Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

Linux/drivers/scsi/ipr.c

  1 /*
  2  * ipr.c -- driver for IBM Power Linux RAID adapters
  3  *
  4  * Written By: Brian King <brking@us.ibm.com>, IBM Corporation
  5  *
  6  * Copyright (C) 2003, 2004 IBM Corporation
  7  *
  8  * This program is free software; you can redistribute it and/or modify
  9  * it under the terms of the GNU General Public License as published by
 10  * the Free Software Foundation; either version 2 of the License, or
 11  * (at your option) any later version.
 12  *
 13  * This program is distributed in the hope that it will be useful,
 14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16  * GNU General Public License for more details.
 17  *
 18  * You should have received a copy of the GNU General Public License
 19  * along with this program; if not, write to the Free Software
 20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 21  *
 22  */
 23 
 24 /*
 25  * Notes:
 26  *
 27  * This driver is used to control the following SCSI adapters:
 28  *
 29  * IBM iSeries: 5702, 5703, 2780, 5709, 570A, 570B
 30  *
 31  * IBM pSeries: PCI-X Dual Channel Ultra 320 SCSI RAID Adapter
 32  *              PCI-X Dual Channel Ultra 320 SCSI Adapter
 33  *              PCI-X Dual Channel Ultra 320 SCSI RAID Enablement Card
 34  *              Embedded SCSI adapter on p615 and p655 systems
 35  *
 36  * Supported Hardware Features:
 37  *      - Ultra 320 SCSI controller
 38  *      - PCI-X host interface
 39  *      - Embedded PowerPC RISC Processor and Hardware XOR DMA Engine
 40  *      - Non-Volatile Write Cache
 41  *      - Supports attachment of non-RAID disks, tape, and optical devices
 42  *      - RAID Levels 0, 5, 10
 43  *      - Hot spare
 44  *      - Background Parity Checking
 45  *      - Background Data Scrubbing
 46  *      - Ability to increase the capacity of an existing RAID 5 disk array
 47  *              by adding disks
 48  *
 49  * Driver Features:
 50  *      - Tagged command queuing
 51  *      - Adapter microcode download
 52  *      - PCI hot plug
 53  *      - SCSI device hot plug
 54  *
 55  */
 56 
 57 #include <linux/fs.h>
 58 #include <linux/init.h>
 59 #include <linux/types.h>
 60 #include <linux/errno.h>
 61 #include <linux/kernel.h>
 62 #include <linux/slab.h>
 63 #include <linux/vmalloc.h>
 64 #include <linux/ioport.h>
 65 #include <linux/delay.h>
 66 #include <linux/pci.h>
 67 #include <linux/wait.h>
 68 #include <linux/spinlock.h>
 69 #include <linux/sched.h>
 70 #include <linux/interrupt.h>
 71 #include <linux/blkdev.h>
 72 #include <linux/firmware.h>
 73 #include <linux/module.h>
 74 #include <linux/moduleparam.h>
 75 #include <linux/libata.h>
 76 #include <linux/hdreg.h>
 77 #include <linux/reboot.h>
 78 #include <linux/stringify.h>
 79 #include <asm/io.h>
 80 #include <asm/irq.h>
 81 #include <asm/processor.h>
 82 #include <scsi/scsi.h>
 83 #include <scsi/scsi_host.h>
 84 #include <scsi/scsi_tcq.h>
 85 #include <scsi/scsi_eh.h>
 86 #include <scsi/scsi_cmnd.h>
 87 #include "ipr.h"
 88 
 89 /*
 90  *   Global Data
 91  */
 92 static LIST_HEAD(ipr_ioa_head);
 93 static unsigned int ipr_log_level = IPR_DEFAULT_LOG_LEVEL;
 94 static unsigned int ipr_max_speed = 1;
 95 static int ipr_testmode = 0;
 96 static unsigned int ipr_fastfail = 0;
 97 static unsigned int ipr_transop_timeout = 0;
 98 static unsigned int ipr_debug = 0;
 99 static unsigned int ipr_max_devs = IPR_DEFAULT_SIS64_DEVS;
100 static unsigned int ipr_dual_ioa_raid = 1;
101 static unsigned int ipr_number_of_msix = 2;
102 static DEFINE_SPINLOCK(ipr_driver_lock);
103 
104 /* This table describes the differences between DMA controller chips */
105 static const struct ipr_chip_cfg_t ipr_chip_cfg[] = {
106         { /* Gemstone, Citrine, Obsidian, and Obsidian-E */
107                 .mailbox = 0x0042C,
108                 .max_cmds = 100,
109                 .cache_line_size = 0x20,
110                 .clear_isr = 1,
111                 .iopoll_weight = 0,
112                 {
113                         .set_interrupt_mask_reg = 0x0022C,
114                         .clr_interrupt_mask_reg = 0x00230,
115                         .clr_interrupt_mask_reg32 = 0x00230,
116                         .sense_interrupt_mask_reg = 0x0022C,
117                         .sense_interrupt_mask_reg32 = 0x0022C,
118                         .clr_interrupt_reg = 0x00228,
119                         .clr_interrupt_reg32 = 0x00228,
120                         .sense_interrupt_reg = 0x00224,
121                         .sense_interrupt_reg32 = 0x00224,
122                         .ioarrin_reg = 0x00404,
123                         .sense_uproc_interrupt_reg = 0x00214,
124                         .sense_uproc_interrupt_reg32 = 0x00214,
125                         .set_uproc_interrupt_reg = 0x00214,
126                         .set_uproc_interrupt_reg32 = 0x00214,
127                         .clr_uproc_interrupt_reg = 0x00218,
128                         .clr_uproc_interrupt_reg32 = 0x00218
129                 }
130         },
131         { /* Snipe and Scamp */
132                 .mailbox = 0x0052C,
133                 .max_cmds = 100,
134                 .cache_line_size = 0x20,
135                 .clear_isr = 1,
136                 .iopoll_weight = 0,
137                 {
138                         .set_interrupt_mask_reg = 0x00288,
139                         .clr_interrupt_mask_reg = 0x0028C,
140                         .clr_interrupt_mask_reg32 = 0x0028C,
141                         .sense_interrupt_mask_reg = 0x00288,
142                         .sense_interrupt_mask_reg32 = 0x00288,
143                         .clr_interrupt_reg = 0x00284,
144                         .clr_interrupt_reg32 = 0x00284,
145                         .sense_interrupt_reg = 0x00280,
146                         .sense_interrupt_reg32 = 0x00280,
147                         .ioarrin_reg = 0x00504,
148                         .sense_uproc_interrupt_reg = 0x00290,
149                         .sense_uproc_interrupt_reg32 = 0x00290,
150                         .set_uproc_interrupt_reg = 0x00290,
151                         .set_uproc_interrupt_reg32 = 0x00290,
152                         .clr_uproc_interrupt_reg = 0x00294,
153                         .clr_uproc_interrupt_reg32 = 0x00294
154                 }
155         },
156         { /* CRoC */
157                 .mailbox = 0x00044,
158                 .max_cmds = 1000,
159                 .cache_line_size = 0x20,
160                 .clear_isr = 0,
161                 .iopoll_weight = 64,
162                 {
163                         .set_interrupt_mask_reg = 0x00010,
164                         .clr_interrupt_mask_reg = 0x00018,
165                         .clr_interrupt_mask_reg32 = 0x0001C,
166                         .sense_interrupt_mask_reg = 0x00010,
167                         .sense_interrupt_mask_reg32 = 0x00014,
168                         .clr_interrupt_reg = 0x00008,
169                         .clr_interrupt_reg32 = 0x0000C,
170                         .sense_interrupt_reg = 0x00000,
171                         .sense_interrupt_reg32 = 0x00004,
172                         .ioarrin_reg = 0x00070,
173                         .sense_uproc_interrupt_reg = 0x00020,
174                         .sense_uproc_interrupt_reg32 = 0x00024,
175                         .set_uproc_interrupt_reg = 0x00020,
176                         .set_uproc_interrupt_reg32 = 0x00024,
177                         .clr_uproc_interrupt_reg = 0x00028,
178                         .clr_uproc_interrupt_reg32 = 0x0002C,
179                         .init_feedback_reg = 0x0005C,
180                         .dump_addr_reg = 0x00064,
181                         .dump_data_reg = 0x00068,
182                         .endian_swap_reg = 0x00084
183                 }
184         },
185 };
186 
187 static const struct ipr_chip_t ipr_chip[] = {
188         { PCI_VENDOR_ID_MYLEX, PCI_DEVICE_ID_IBM_GEMSTONE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
189         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
190         { PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_OBSIDIAN, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
191         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
192         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E, IPR_USE_MSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
193         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_SNIPE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[1] },
194         { PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_SCAMP, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[1] },
195         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROC_FPGA_E2, IPR_USE_MSI, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] },
196         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE, IPR_USE_MSI, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] }
197 };
198 
199 static int ipr_max_bus_speeds[] = {
200         IPR_80MBs_SCSI_RATE, IPR_U160_SCSI_RATE, IPR_U320_SCSI_RATE
201 };
202 
203 MODULE_AUTHOR("Brian King <brking@us.ibm.com>");
204 MODULE_DESCRIPTION("IBM Power RAID SCSI Adapter Driver");
205 module_param_named(max_speed, ipr_max_speed, uint, 0);
206 MODULE_PARM_DESC(max_speed, "Maximum bus speed (0-2). Default: 1=U160. Speeds: 0=80 MB/s, 1=U160, 2=U320");
207 module_param_named(log_level, ipr_log_level, uint, 0);
208 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver");
209 module_param_named(testmode, ipr_testmode, int, 0);
210 MODULE_PARM_DESC(testmode, "DANGEROUS!!! Allows unsupported configurations");
211 module_param_named(fastfail, ipr_fastfail, int, S_IRUGO | S_IWUSR);
212 MODULE_PARM_DESC(fastfail, "Reduce timeouts and retries");
213 module_param_named(transop_timeout, ipr_transop_timeout, int, 0);
214 MODULE_PARM_DESC(transop_timeout, "Time in seconds to wait for adapter to come operational (default: 300)");
215 module_param_named(debug, ipr_debug, int, S_IRUGO | S_IWUSR);
216 MODULE_PARM_DESC(debug, "Enable device driver debugging logging. Set to 1 to enable. (default: 0)");
217 module_param_named(dual_ioa_raid, ipr_dual_ioa_raid, int, 0);
218 MODULE_PARM_DESC(dual_ioa_raid, "Enable dual adapter RAID support. Set to 1 to enable. (default: 1)");
219 module_param_named(max_devs, ipr_max_devs, int, 0);
220 MODULE_PARM_DESC(max_devs, "Specify the maximum number of physical devices. "
221                  "[Default=" __stringify(IPR_DEFAULT_SIS64_DEVS) "]");
222 module_param_named(number_of_msix, ipr_number_of_msix, int, 0);
223 MODULE_PARM_DESC(number_of_msix, "Specify the number of MSIX interrupts to use on capable adapters (1 - 16).  (default:2)");
224 MODULE_LICENSE("GPL");
225 MODULE_VERSION(IPR_DRIVER_VERSION);
226 
227 /*  A constant array of IOASCs/URCs/Error Messages */
228 static const
229 struct ipr_error_table_t ipr_error_table[] = {
230         {0x00000000, 1, IPR_DEFAULT_LOG_LEVEL,
231         "8155: An unknown error was received"},
232         {0x00330000, 0, 0,
233         "Soft underlength error"},
234         {0x005A0000, 0, 0,
235         "Command to be cancelled not found"},
236         {0x00808000, 0, 0,
237         "Qualified success"},
238         {0x01080000, 1, IPR_DEFAULT_LOG_LEVEL,
239         "FFFE: Soft device bus error recovered by the IOA"},
240         {0x01088100, 0, IPR_DEFAULT_LOG_LEVEL,
241         "4101: Soft device bus fabric error"},
242         {0x01100100, 0, IPR_DEFAULT_LOG_LEVEL,
243         "FFFC: Logical block guard error recovered by the device"},
244         {0x01100300, 0, IPR_DEFAULT_LOG_LEVEL,
245         "FFFC: Logical block reference tag error recovered by the device"},
246         {0x01108300, 0, IPR_DEFAULT_LOG_LEVEL,
247         "4171: Recovered scatter list tag / sequence number error"},
248         {0x01109000, 0, IPR_DEFAULT_LOG_LEVEL,
249         "FF3D: Recovered logical block CRC error on IOA to Host transfer"},
250         {0x01109200, 0, IPR_DEFAULT_LOG_LEVEL,
251         "4171: Recovered logical block sequence number error on IOA to Host transfer"},
252         {0x0110A000, 0, IPR_DEFAULT_LOG_LEVEL,
253         "FFFD: Recovered logical block reference tag error detected by the IOA"},
254         {0x0110A100, 0, IPR_DEFAULT_LOG_LEVEL,
255         "FFFD: Logical block guard error recovered by the IOA"},
256         {0x01170600, 0, IPR_DEFAULT_LOG_LEVEL,
257         "FFF9: Device sector reassign successful"},
258         {0x01170900, 0, IPR_DEFAULT_LOG_LEVEL,
259         "FFF7: Media error recovered by device rewrite procedures"},
260         {0x01180200, 0, IPR_DEFAULT_LOG_LEVEL,
261         "7001: IOA sector reassignment successful"},
262         {0x01180500, 0, IPR_DEFAULT_LOG_LEVEL,
263         "FFF9: Soft media error. Sector reassignment recommended"},
264         {0x01180600, 0, IPR_DEFAULT_LOG_LEVEL,
265         "FFF7: Media error recovered by IOA rewrite procedures"},
266         {0x01418000, 0, IPR_DEFAULT_LOG_LEVEL,
267         "FF3D: Soft PCI bus error recovered by the IOA"},
268         {0x01440000, 1, IPR_DEFAULT_LOG_LEVEL,
269         "FFF6: Device hardware error recovered by the IOA"},
270         {0x01448100, 0, IPR_DEFAULT_LOG_LEVEL,
271         "FFF6: Device hardware error recovered by the device"},
272         {0x01448200, 1, IPR_DEFAULT_LOG_LEVEL,
273         "FF3D: Soft IOA error recovered by the IOA"},
274         {0x01448300, 0, IPR_DEFAULT_LOG_LEVEL,
275         "FFFA: Undefined device response recovered by the IOA"},
276         {0x014A0000, 1, IPR_DEFAULT_LOG_LEVEL,
277         "FFF6: Device bus error, message or command phase"},
278         {0x014A8000, 0, IPR_DEFAULT_LOG_LEVEL,
279         "FFFE: Task Management Function failed"},
280         {0x015D0000, 0, IPR_DEFAULT_LOG_LEVEL,
281         "FFF6: Failure prediction threshold exceeded"},
282         {0x015D9200, 0, IPR_DEFAULT_LOG_LEVEL,
283         "8009: Impending cache battery pack failure"},
284         {0x02040100, 0, 0,
285         "Logical Unit in process of becoming ready"},
286         {0x02040200, 0, 0,
287         "Initializing command required"},
288         {0x02040400, 0, 0,
289         "34FF: Disk device format in progress"},
290         {0x02040C00, 0, 0,
291         "Logical unit not accessible, target port in unavailable state"},
292         {0x02048000, 0, IPR_DEFAULT_LOG_LEVEL,
293         "9070: IOA requested reset"},
294         {0x023F0000, 0, 0,
295         "Synchronization required"},
296         {0x02408500, 0, 0,
297         "IOA microcode download required"},
298         {0x02408600, 0, 0,
299         "Device bus connection is prohibited by host"},
300         {0x024E0000, 0, 0,
301         "No ready, IOA shutdown"},
302         {0x025A0000, 0, 0,
303         "Not ready, IOA has been shutdown"},
304         {0x02670100, 0, IPR_DEFAULT_LOG_LEVEL,
305         "3020: Storage subsystem configuration error"},
306         {0x03110B00, 0, 0,
307         "FFF5: Medium error, data unreadable, recommend reassign"},
308         {0x03110C00, 0, 0,
309         "7000: Medium error, data unreadable, do not reassign"},
310         {0x03310000, 0, IPR_DEFAULT_LOG_LEVEL,
311         "FFF3: Disk media format bad"},
312         {0x04050000, 0, IPR_DEFAULT_LOG_LEVEL,
313         "3002: Addressed device failed to respond to selection"},
314         {0x04080000, 1, IPR_DEFAULT_LOG_LEVEL,
315         "3100: Device bus error"},
316         {0x04080100, 0, IPR_DEFAULT_LOG_LEVEL,
317         "3109: IOA timed out a device command"},
318         {0x04088000, 0, 0,
319         "3120: SCSI bus is not operational"},
320         {0x04088100, 0, IPR_DEFAULT_LOG_LEVEL,
321         "4100: Hard device bus fabric error"},
322         {0x04100100, 0, IPR_DEFAULT_LOG_LEVEL,
323         "310C: Logical block guard error detected by the device"},
324         {0x04100300, 0, IPR_DEFAULT_LOG_LEVEL,
325         "310C: Logical block reference tag error detected by the device"},
326         {0x04108300, 1, IPR_DEFAULT_LOG_LEVEL,
327         "4170: Scatter list tag / sequence number error"},
328         {0x04109000, 1, IPR_DEFAULT_LOG_LEVEL,
329         "8150: Logical block CRC error on IOA to Host transfer"},
330         {0x04109200, 1, IPR_DEFAULT_LOG_LEVEL,
331         "4170: Logical block sequence number error on IOA to Host transfer"},
332         {0x0410A000, 0, IPR_DEFAULT_LOG_LEVEL,
333         "310D: Logical block reference tag error detected by the IOA"},
334         {0x0410A100, 0, IPR_DEFAULT_LOG_LEVEL,
335         "310D: Logical block guard error detected by the IOA"},
336         {0x04118000, 0, IPR_DEFAULT_LOG_LEVEL,
337         "9000: IOA reserved area data check"},
338         {0x04118100, 0, IPR_DEFAULT_LOG_LEVEL,
339         "9001: IOA reserved area invalid data pattern"},
340         {0x04118200, 0, IPR_DEFAULT_LOG_LEVEL,
341         "9002: IOA reserved area LRC error"},
342         {0x04118300, 1, IPR_DEFAULT_LOG_LEVEL,
343         "Hardware Error, IOA metadata access error"},
344         {0x04320000, 0, IPR_DEFAULT_LOG_LEVEL,
345         "102E: Out of alternate sectors for disk storage"},
346         {0x04330000, 1, IPR_DEFAULT_LOG_LEVEL,
347         "FFF4: Data transfer underlength error"},
348         {0x04338000, 1, IPR_DEFAULT_LOG_LEVEL,
349         "FFF4: Data transfer overlength error"},
350         {0x043E0100, 0, IPR_DEFAULT_LOG_LEVEL,
351         "3400: Logical unit failure"},
352         {0x04408500, 0, IPR_DEFAULT_LOG_LEVEL,
353         "FFF4: Device microcode is corrupt"},
354         {0x04418000, 1, IPR_DEFAULT_LOG_LEVEL,
355         "8150: PCI bus error"},
356         {0x04430000, 1, 0,
357         "Unsupported device bus message received"},
358         {0x04440000, 1, IPR_DEFAULT_LOG_LEVEL,
359         "FFF4: Disk device problem"},
360         {0x04448200, 1, IPR_DEFAULT_LOG_LEVEL,
361         "8150: Permanent IOA failure"},
362         {0x04448300, 0, IPR_DEFAULT_LOG_LEVEL,
363         "3010: Disk device returned wrong response to IOA"},
364         {0x04448400, 0, IPR_DEFAULT_LOG_LEVEL,
365         "8151: IOA microcode error"},
366         {0x04448500, 0, 0,
367         "Device bus status error"},
368         {0x04448600, 0, IPR_DEFAULT_LOG_LEVEL,
369         "8157: IOA error requiring IOA reset to recover"},
370         {0x04448700, 0, 0,
371         "ATA device status error"},
372         {0x04490000, 0, 0,
373         "Message reject received from the device"},
374         {0x04449200, 0, IPR_DEFAULT_LOG_LEVEL,
375         "8008: A permanent cache battery pack failure occurred"},
376         {0x0444A000, 0, IPR_DEFAULT_LOG_LEVEL,
377         "9090: Disk unit has been modified after the last known status"},
378         {0x0444A200, 0, IPR_DEFAULT_LOG_LEVEL,
379         "9081: IOA detected device error"},
380         {0x0444A300, 0, IPR_DEFAULT_LOG_LEVEL,
381         "9082: IOA detected device error"},
382         {0x044A0000, 1, IPR_DEFAULT_LOG_LEVEL,
383         "3110: Device bus error, message or command phase"},
384         {0x044A8000, 1, IPR_DEFAULT_LOG_LEVEL,
385         "3110: SAS Command / Task Management Function failed"},
386         {0x04670400, 0, IPR_DEFAULT_LOG_LEVEL,
387         "9091: Incorrect hardware configuration change has been detected"},
388         {0x04678000, 0, IPR_DEFAULT_LOG_LEVEL,
389         "9073: Invalid multi-adapter configuration"},
390         {0x04678100, 0, IPR_DEFAULT_LOG_LEVEL,
391         "4010: Incorrect connection between cascaded expanders"},
392         {0x04678200, 0, IPR_DEFAULT_LOG_LEVEL,
393         "4020: Connections exceed IOA design limits"},
394         {0x04678300, 0, IPR_DEFAULT_LOG_LEVEL,
395         "4030: Incorrect multipath connection"},
396         {0x04679000, 0, IPR_DEFAULT_LOG_LEVEL,
397         "4110: Unsupported enclosure function"},
398         {0x04679800, 0, IPR_DEFAULT_LOG_LEVEL,
399         "4120: SAS cable VPD cannot be read"},
400         {0x046E0000, 0, IPR_DEFAULT_LOG_LEVEL,
401         "FFF4: Command to logical unit failed"},
402         {0x05240000, 1, 0,
403         "Illegal request, invalid request type or request packet"},
404         {0x05250000, 0, 0,
405         "Illegal request, invalid resource handle"},
406         {0x05258000, 0, 0,
407         "Illegal request, commands not allowed to this device"},
408         {0x05258100, 0, 0,
409         "Illegal request, command not allowed to a secondary adapter"},
410         {0x05258200, 0, 0,
411         "Illegal request, command not allowed to a non-optimized resource"},
412         {0x05260000, 0, 0,
413         "Illegal request, invalid field in parameter list"},
414         {0x05260100, 0, 0,
415         "Illegal request, parameter not supported"},
416         {0x05260200, 0, 0,
417         "Illegal request, parameter value invalid"},
418         {0x052C0000, 0, 0,
419         "Illegal request, command sequence error"},
420         {0x052C8000, 1, 0,
421         "Illegal request, dual adapter support not enabled"},
422         {0x052C8100, 1, 0,
423         "Illegal request, another cable connector was physically disabled"},
424         {0x054E8000, 1, 0,
425         "Illegal request, inconsistent group id/group count"},
426         {0x06040500, 0, IPR_DEFAULT_LOG_LEVEL,
427         "9031: Array protection temporarily suspended, protection resuming"},
428         {0x06040600, 0, IPR_DEFAULT_LOG_LEVEL,
429         "9040: Array protection temporarily suspended, protection resuming"},
430         {0x060B0100, 0, IPR_DEFAULT_LOG_LEVEL,
431         "4080: IOA exceeded maximum operating temperature"},
432         {0x060B8000, 0, IPR_DEFAULT_LOG_LEVEL,
433         "4085: Service required"},
434         {0x06288000, 0, IPR_DEFAULT_LOG_LEVEL,
435         "3140: Device bus not ready to ready transition"},
436         {0x06290000, 0, IPR_DEFAULT_LOG_LEVEL,
437         "FFFB: SCSI bus was reset"},
438         {0x06290500, 0, 0,
439         "FFFE: SCSI bus transition to single ended"},
440         {0x06290600, 0, 0,
441         "FFFE: SCSI bus transition to LVD"},
442         {0x06298000, 0, IPR_DEFAULT_LOG_LEVEL,
443         "FFFB: SCSI bus was reset by another initiator"},
444         {0x063F0300, 0, IPR_DEFAULT_LOG_LEVEL,
445         "3029: A device replacement has occurred"},
446         {0x063F8300, 0, IPR_DEFAULT_LOG_LEVEL,
447         "4102: Device bus fabric performance degradation"},
448         {0x064C8000, 0, IPR_DEFAULT_LOG_LEVEL,
449         "9051: IOA cache data exists for a missing or failed device"},
450         {0x064C8100, 0, IPR_DEFAULT_LOG_LEVEL,
451         "9055: Auxiliary cache IOA contains cache data needed by the primary IOA"},
452         {0x06670100, 0, IPR_DEFAULT_LOG_LEVEL,
453         "9025: Disk unit is not supported at its physical location"},
454         {0x06670600, 0, IPR_DEFAULT_LOG_LEVEL,
455         "3020: IOA detected a SCSI bus configuration error"},
456         {0x06678000, 0, IPR_DEFAULT_LOG_LEVEL,
457         "3150: SCSI bus configuration error"},
458         {0x06678100, 0, IPR_DEFAULT_LOG_LEVEL,
459         "9074: Asymmetric advanced function disk configuration"},
460         {0x06678300, 0, IPR_DEFAULT_LOG_LEVEL,
461         "4040: Incomplete multipath connection between IOA and enclosure"},
462         {0x06678400, 0, IPR_DEFAULT_LOG_LEVEL,
463         "4041: Incomplete multipath connection between enclosure and device"},
464         {0x06678500, 0, IPR_DEFAULT_LOG_LEVEL,
465         "9075: Incomplete multipath connection between IOA and remote IOA"},
466         {0x06678600, 0, IPR_DEFAULT_LOG_LEVEL,
467         "9076: Configuration error, missing remote IOA"},
468         {0x06679100, 0, IPR_DEFAULT_LOG_LEVEL,
469         "4050: Enclosure does not support a required multipath function"},
470         {0x06679800, 0, IPR_DEFAULT_LOG_LEVEL,
471         "4121: Configuration error, required cable is missing"},
472         {0x06679900, 0, IPR_DEFAULT_LOG_LEVEL,
473         "4122: Cable is not plugged into the correct location on remote IOA"},
474         {0x06679A00, 0, IPR_DEFAULT_LOG_LEVEL,
475         "4123: Configuration error, invalid cable vital product data"},
476         {0x06679B00, 0, IPR_DEFAULT_LOG_LEVEL,
477         "4124: Configuration error, both cable ends are plugged into the same IOA"},
478         {0x06690000, 0, IPR_DEFAULT_LOG_LEVEL,
479         "4070: Logically bad block written on device"},
480         {0x06690200, 0, IPR_DEFAULT_LOG_LEVEL,
481         "9041: Array protection temporarily suspended"},
482         {0x06698200, 0, IPR_DEFAULT_LOG_LEVEL,
483         "9042: Corrupt array parity detected on specified device"},
484         {0x066B0200, 0, IPR_DEFAULT_LOG_LEVEL,
485         "9030: Array no longer protected due to missing or failed disk unit"},
486         {0x066B8000, 0, IPR_DEFAULT_LOG_LEVEL,
487         "9071: Link operational transition"},
488         {0x066B8100, 0, IPR_DEFAULT_LOG_LEVEL,
489         "9072: Link not operational transition"},
490         {0x066B8200, 0, IPR_DEFAULT_LOG_LEVEL,
491         "9032: Array exposed but still protected"},
492         {0x066B8300, 0, IPR_DEFAULT_LOG_LEVEL + 1,
493         "70DD: Device forced failed by disrupt device command"},
494         {0x066B9100, 0, IPR_DEFAULT_LOG_LEVEL,
495         "4061: Multipath redundancy level got better"},
496         {0x066B9200, 0, IPR_DEFAULT_LOG_LEVEL,
497         "4060: Multipath redundancy level got worse"},
498         {0x07270000, 0, 0,
499         "Failure due to other device"},
500         {0x07278000, 0, IPR_DEFAULT_LOG_LEVEL,
501         "9008: IOA does not support functions expected by devices"},
502         {0x07278100, 0, IPR_DEFAULT_LOG_LEVEL,
503         "9010: Cache data associated with attached devices cannot be found"},
504         {0x07278200, 0, IPR_DEFAULT_LOG_LEVEL,
505         "9011: Cache data belongs to devices other than those attached"},
506         {0x07278400, 0, IPR_DEFAULT_LOG_LEVEL,
507         "9020: Array missing 2 or more devices with only 1 device present"},
508         {0x07278500, 0, IPR_DEFAULT_LOG_LEVEL,
509         "9021: Array missing 2 or more devices with 2 or more devices present"},
510         {0x07278600, 0, IPR_DEFAULT_LOG_LEVEL,
511         "9022: Exposed array is missing a required device"},
512         {0x07278700, 0, IPR_DEFAULT_LOG_LEVEL,
513         "9023: Array member(s) not at required physical locations"},
514         {0x07278800, 0, IPR_DEFAULT_LOG_LEVEL,
515         "9024: Array not functional due to present hardware configuration"},
516         {0x07278900, 0, IPR_DEFAULT_LOG_LEVEL,
517         "9026: Array not functional due to present hardware configuration"},
518         {0x07278A00, 0, IPR_DEFAULT_LOG_LEVEL,
519         "9027: Array is missing a device and parity is out of sync"},
520         {0x07278B00, 0, IPR_DEFAULT_LOG_LEVEL,
521         "9028: Maximum number of arrays already exist"},
522         {0x07278C00, 0, IPR_DEFAULT_LOG_LEVEL,
523         "9050: Required cache data cannot be located for a disk unit"},
524         {0x07278D00, 0, IPR_DEFAULT_LOG_LEVEL,
525         "9052: Cache data exists for a device that has been modified"},
526         {0x07278F00, 0, IPR_DEFAULT_LOG_LEVEL,
527         "9054: IOA resources not available due to previous problems"},
528         {0x07279100, 0, IPR_DEFAULT_LOG_LEVEL,
529         "9092: Disk unit requires initialization before use"},
530         {0x07279200, 0, IPR_DEFAULT_LOG_LEVEL,
531         "9029: Incorrect hardware configuration change has been detected"},
532         {0x07279600, 0, IPR_DEFAULT_LOG_LEVEL,
533         "9060: One or more disk pairs are missing from an array"},
534         {0x07279700, 0, IPR_DEFAULT_LOG_LEVEL,
535         "9061: One or more disks are missing from an array"},
536         {0x07279800, 0, IPR_DEFAULT_LOG_LEVEL,
537         "9062: One or more disks are missing from an array"},
538         {0x07279900, 0, IPR_DEFAULT_LOG_LEVEL,
539         "9063: Maximum number of functional arrays has been exceeded"},
540         {0x07279A00, 0, 0,
541         "Data protect, other volume set problem"},
542         {0x0B260000, 0, 0,
543         "Aborted command, invalid descriptor"},
544         {0x0B3F9000, 0, 0,
545         "Target operating conditions have changed, dual adapter takeover"},
546         {0x0B530200, 0, 0,
547         "Aborted command, medium removal prevented"},
548         {0x0B5A0000, 0, 0,
549         "Command terminated by host"},
550         {0x0B5B8000, 0, 0,
551         "Aborted command, command terminated by host"}
552 };
553 
554 static const struct ipr_ses_table_entry ipr_ses_table[] = {
555         { "2104-DL1        ", "XXXXXXXXXXXXXXXX", 80 },
556         { "2104-TL1        ", "XXXXXXXXXXXXXXXX", 80 },
557         { "HSBP07M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 7 slot */
558         { "HSBP05M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 5 slot */
559         { "HSBP05M S U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Bowtie */
560         { "HSBP06E ASU2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* MartinFenning */
561         { "2104-DU3        ", "XXXXXXXXXXXXXXXX", 160 },
562         { "2104-TU3        ", "XXXXXXXXXXXXXXXX", 160 },
563         { "HSBP04C RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
564         { "HSBP06E RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
565         { "St  V1S2        ", "XXXXXXXXXXXXXXXX", 160 },
566         { "HSBPD4M  PU3SCSI", "XXXXXXX*XXXXXXXX", 160 },
567         { "VSBPD1H   U3SCSI", "XXXXXXX*XXXXXXXX", 160 }
568 };
569 
570 /*
571  *  Function Prototypes
572  */
573 static int ipr_reset_alert(struct ipr_cmnd *);
574 static void ipr_process_ccn(struct ipr_cmnd *);
575 static void ipr_process_error(struct ipr_cmnd *);
576 static void ipr_reset_ioa_job(struct ipr_cmnd *);
577 static void ipr_initiate_ioa_reset(struct ipr_ioa_cfg *,
578                                    enum ipr_shutdown_type);
579 
580 #ifdef CONFIG_SCSI_IPR_TRACE
581 /**
582  * ipr_trc_hook - Add a trace entry to the driver trace
583  * @ipr_cmd:    ipr command struct
584  * @type:               trace type
585  * @add_data:   additional data
586  *
587  * Return value:
588  *      none
589  **/
590 static void ipr_trc_hook(struct ipr_cmnd *ipr_cmd,
591                          u8 type, u32 add_data)
592 {
593         struct ipr_trace_entry *trace_entry;
594         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
595 
596         trace_entry = &ioa_cfg->trace[atomic_add_return
597                         (1, &ioa_cfg->trace_index)%IPR_NUM_TRACE_ENTRIES];
598         trace_entry->time = jiffies;
599         trace_entry->op_code = ipr_cmd->ioarcb.cmd_pkt.cdb[0];
600         trace_entry->type = type;
601         if (ipr_cmd->ioa_cfg->sis64)
602                 trace_entry->ata_op_code = ipr_cmd->i.ata_ioadl.regs.command;
603         else
604                 trace_entry->ata_op_code = ipr_cmd->ioarcb.u.add_data.u.regs.command;
605         trace_entry->cmd_index = ipr_cmd->cmd_index & 0xff;
606         trace_entry->res_handle = ipr_cmd->ioarcb.res_handle;
607         trace_entry->u.add_data = add_data;
608         wmb();
609 }
610 #else
611 #define ipr_trc_hook(ipr_cmd, type, add_data) do { } while (0)
612 #endif
613 
614 /**
615  * ipr_lock_and_done - Acquire lock and complete command
616  * @ipr_cmd:    ipr command struct
617  *
618  * Return value:
619  *      none
620  **/
621 static void ipr_lock_and_done(struct ipr_cmnd *ipr_cmd)
622 {
623         unsigned long lock_flags;
624         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
625 
626         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
627         ipr_cmd->done(ipr_cmd);
628         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
629 }
630 
631 /**
632  * ipr_reinit_ipr_cmnd - Re-initialize an IPR Cmnd block for reuse
633  * @ipr_cmd:    ipr command struct
634  *
635  * Return value:
636  *      none
637  **/
638 static void ipr_reinit_ipr_cmnd(struct ipr_cmnd *ipr_cmd)
639 {
640         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
641         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
642         struct ipr_ioasa64 *ioasa64 = &ipr_cmd->s.ioasa64;
643         dma_addr_t dma_addr = ipr_cmd->dma_addr;
644         int hrrq_id;
645 
646         hrrq_id = ioarcb->cmd_pkt.hrrq_id;
647         memset(&ioarcb->cmd_pkt, 0, sizeof(struct ipr_cmd_pkt));
648         ioarcb->cmd_pkt.hrrq_id = hrrq_id;
649         ioarcb->data_transfer_length = 0;
650         ioarcb->read_data_transfer_length = 0;
651         ioarcb->ioadl_len = 0;
652         ioarcb->read_ioadl_len = 0;
653 
654         if (ipr_cmd->ioa_cfg->sis64) {
655                 ioarcb->u.sis64_addr_data.data_ioadl_addr =
656                         cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ioadl64));
657                 ioasa64->u.gata.status = 0;
658         } else {
659                 ioarcb->write_ioadl_addr =
660                         cpu_to_be32(dma_addr + offsetof(struct ipr_cmnd, i.ioadl));
661                 ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
662                 ioasa->u.gata.status = 0;
663         }
664 
665         ioasa->hdr.ioasc = 0;
666         ioasa->hdr.residual_data_len = 0;
667         ipr_cmd->scsi_cmd = NULL;
668         ipr_cmd->qc = NULL;
669         ipr_cmd->sense_buffer[0] = 0;
670         ipr_cmd->dma_use_sg = 0;
671 }
672 
673 /**
674  * ipr_init_ipr_cmnd - Initialize an IPR Cmnd block
675  * @ipr_cmd:    ipr command struct
676  *
677  * Return value:
678  *      none
679  **/
680 static void ipr_init_ipr_cmnd(struct ipr_cmnd *ipr_cmd,
681                               void (*fast_done) (struct ipr_cmnd *))
682 {
683         ipr_reinit_ipr_cmnd(ipr_cmd);
684         ipr_cmd->u.scratch = 0;
685         ipr_cmd->sibling = NULL;
686         ipr_cmd->fast_done = fast_done;
687         init_timer(&ipr_cmd->timer);
688 }
689 
690 /**
691  * __ipr_get_free_ipr_cmnd - Get a free IPR Cmnd block
692  * @ioa_cfg:    ioa config struct
693  *
694  * Return value:
695  *      pointer to ipr command struct
696  **/
697 static
698 struct ipr_cmnd *__ipr_get_free_ipr_cmnd(struct ipr_hrr_queue *hrrq)
699 {
700         struct ipr_cmnd *ipr_cmd = NULL;
701 
702         if (likely(!list_empty(&hrrq->hrrq_free_q))) {
703                 ipr_cmd = list_entry(hrrq->hrrq_free_q.next,
704                         struct ipr_cmnd, queue);
705                 list_del(&ipr_cmd->queue);
706         }
707 
708 
709         return ipr_cmd;
710 }
711 
712 /**
713  * ipr_get_free_ipr_cmnd - Get a free IPR Cmnd block and initialize it
714  * @ioa_cfg:    ioa config struct
715  *
716  * Return value:
717  *      pointer to ipr command struct
718  **/
719 static
720 struct ipr_cmnd *ipr_get_free_ipr_cmnd(struct ipr_ioa_cfg *ioa_cfg)
721 {
722         struct ipr_cmnd *ipr_cmd =
723                 __ipr_get_free_ipr_cmnd(&ioa_cfg->hrrq[IPR_INIT_HRRQ]);
724         ipr_init_ipr_cmnd(ipr_cmd, ipr_lock_and_done);
725         return ipr_cmd;
726 }
727 
728 /**
729  * ipr_mask_and_clear_interrupts - Mask all and clear specified interrupts
730  * @ioa_cfg:    ioa config struct
731  * @clr_ints:     interrupts to clear
732  *
733  * This function masks all interrupts on the adapter, then clears the
734  * interrupts specified in the mask
735  *
736  * Return value:
737  *      none
738  **/
739 static void ipr_mask_and_clear_interrupts(struct ipr_ioa_cfg *ioa_cfg,
740                                           u32 clr_ints)
741 {
742         volatile u32 int_reg;
743         int i;
744 
745         /* Stop new interrupts */
746         for (i = 0; i < ioa_cfg->hrrq_num; i++) {
747                 spin_lock(&ioa_cfg->hrrq[i]._lock);
748                 ioa_cfg->hrrq[i].allow_interrupts = 0;
749                 spin_unlock(&ioa_cfg->hrrq[i]._lock);
750         }
751         wmb();
752 
753         /* Set interrupt mask to stop all new interrupts */
754         if (ioa_cfg->sis64)
755                 writeq(~0, ioa_cfg->regs.set_interrupt_mask_reg);
756         else
757                 writel(~0, ioa_cfg->regs.set_interrupt_mask_reg);
758 
759         /* Clear any pending interrupts */
760         if (ioa_cfg->sis64)
761                 writel(~0, ioa_cfg->regs.clr_interrupt_reg);
762         writel(clr_ints, ioa_cfg->regs.clr_interrupt_reg32);
763         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
764 }
765 
766 /**
767  * ipr_save_pcix_cmd_reg - Save PCI-X command register
768  * @ioa_cfg:    ioa config struct
769  *
770  * Return value:
771  *      0 on success / -EIO on failure
772  **/
773 static int ipr_save_pcix_cmd_reg(struct ipr_ioa_cfg *ioa_cfg)
774 {
775         int pcix_cmd_reg = pci_find_capability(ioa_cfg->pdev, PCI_CAP_ID_PCIX);
776 
777         if (pcix_cmd_reg == 0)
778                 return 0;
779 
780         if (pci_read_config_word(ioa_cfg->pdev, pcix_cmd_reg + PCI_X_CMD,
781                                  &ioa_cfg->saved_pcix_cmd_reg) != PCIBIOS_SUCCESSFUL) {
782                 dev_err(&ioa_cfg->pdev->dev, "Failed to save PCI-X command register\n");
783                 return -EIO;
784         }
785 
786         ioa_cfg->saved_pcix_cmd_reg |= PCI_X_CMD_DPERR_E | PCI_X_CMD_ERO;
787         return 0;
788 }
789 
790 /**
791  * ipr_set_pcix_cmd_reg - Setup PCI-X command register
792  * @ioa_cfg:    ioa config struct
793  *
794  * Return value:
795  *      0 on success / -EIO on failure
796  **/
797 static int ipr_set_pcix_cmd_reg(struct ipr_ioa_cfg *ioa_cfg)
798 {
799         int pcix_cmd_reg = pci_find_capability(ioa_cfg->pdev, PCI_CAP_ID_PCIX);
800 
801         if (pcix_cmd_reg) {
802                 if (pci_write_config_word(ioa_cfg->pdev, pcix_cmd_reg + PCI_X_CMD,
803                                           ioa_cfg->saved_pcix_cmd_reg) != PCIBIOS_SUCCESSFUL) {
804                         dev_err(&ioa_cfg->pdev->dev, "Failed to setup PCI-X command register\n");
805                         return -EIO;
806                 }
807         }
808 
809         return 0;
810 }
811 
812 /**
813  * ipr_sata_eh_done - done function for aborted SATA commands
814  * @ipr_cmd:    ipr command struct
815  *
816  * This function is invoked for ops generated to SATA
817  * devices which are being aborted.
818  *
819  * Return value:
820  *      none
821  **/
822 static void ipr_sata_eh_done(struct ipr_cmnd *ipr_cmd)
823 {
824         struct ata_queued_cmd *qc = ipr_cmd->qc;
825         struct ipr_sata_port *sata_port = qc->ap->private_data;
826 
827         qc->err_mask |= AC_ERR_OTHER;
828         sata_port->ioasa.status |= ATA_BUSY;
829         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
830         ata_qc_complete(qc);
831 }
832 
833 /**
834  * ipr_scsi_eh_done - mid-layer done function for aborted ops
835  * @ipr_cmd:    ipr command struct
836  *
837  * This function is invoked by the interrupt handler for
838  * ops generated by the SCSI mid-layer which are being aborted.
839  *
840  * Return value:
841  *      none
842  **/
843 static void ipr_scsi_eh_done(struct ipr_cmnd *ipr_cmd)
844 {
845         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
846 
847         scsi_cmd->result |= (DID_ERROR << 16);
848 
849         scsi_dma_unmap(ipr_cmd->scsi_cmd);
850         scsi_cmd->scsi_done(scsi_cmd);
851         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
852 }
853 
854 /**
855  * ipr_fail_all_ops - Fails all outstanding ops.
856  * @ioa_cfg:    ioa config struct
857  *
858  * This function fails all outstanding ops.
859  *
860  * Return value:
861  *      none
862  **/
863 static void ipr_fail_all_ops(struct ipr_ioa_cfg *ioa_cfg)
864 {
865         struct ipr_cmnd *ipr_cmd, *temp;
866         struct ipr_hrr_queue *hrrq;
867 
868         ENTER;
869         for_each_hrrq(hrrq, ioa_cfg) {
870                 spin_lock(&hrrq->_lock);
871                 list_for_each_entry_safe(ipr_cmd,
872                                         temp, &hrrq->hrrq_pending_q, queue) {
873                         list_del(&ipr_cmd->queue);
874 
875                         ipr_cmd->s.ioasa.hdr.ioasc =
876                                 cpu_to_be32(IPR_IOASC_IOA_WAS_RESET);
877                         ipr_cmd->s.ioasa.hdr.ilid =
878                                 cpu_to_be32(IPR_DRIVER_ILID);
879 
880                         if (ipr_cmd->scsi_cmd)
881                                 ipr_cmd->done = ipr_scsi_eh_done;
882                         else if (ipr_cmd->qc)
883                                 ipr_cmd->done = ipr_sata_eh_done;
884 
885                         ipr_trc_hook(ipr_cmd, IPR_TRACE_FINISH,
886                                      IPR_IOASC_IOA_WAS_RESET);
887                         del_timer(&ipr_cmd->timer);
888                         ipr_cmd->done(ipr_cmd);
889                 }
890                 spin_unlock(&hrrq->_lock);
891         }
892         LEAVE;
893 }
894 
895 /**
896  * ipr_send_command -  Send driver initiated requests.
897  * @ipr_cmd:            ipr command struct
898  *
899  * This function sends a command to the adapter using the correct write call.
900  * In the case of sis64, calculate the ioarcb size required. Then or in the
901  * appropriate bits.
902  *
903  * Return value:
904  *      none
905  **/
906 static void ipr_send_command(struct ipr_cmnd *ipr_cmd)
907 {
908         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
909         dma_addr_t send_dma_addr = ipr_cmd->dma_addr;
910 
911         if (ioa_cfg->sis64) {
912                 /* The default size is 256 bytes */
913                 send_dma_addr |= 0x1;
914 
915                 /* If the number of ioadls * size of ioadl > 128 bytes,
916                    then use a 512 byte ioarcb */
917                 if (ipr_cmd->dma_use_sg * sizeof(struct ipr_ioadl64_desc) > 128 )
918                         send_dma_addr |= 0x4;
919                 writeq(send_dma_addr, ioa_cfg->regs.ioarrin_reg);
920         } else
921                 writel(send_dma_addr, ioa_cfg->regs.ioarrin_reg);
922 }
923 
924 /**
925  * ipr_do_req -  Send driver initiated requests.
926  * @ipr_cmd:            ipr command struct
927  * @done:                       done function
928  * @timeout_func:       timeout function
929  * @timeout:            timeout value
930  *
931  * This function sends the specified command to the adapter with the
932  * timeout given. The done function is invoked on command completion.
933  *
934  * Return value:
935  *      none
936  **/
937 static void ipr_do_req(struct ipr_cmnd *ipr_cmd,
938                        void (*done) (struct ipr_cmnd *),
939                        void (*timeout_func) (struct ipr_cmnd *), u32 timeout)
940 {
941         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
942 
943         ipr_cmd->done = done;
944 
945         ipr_cmd->timer.data = (unsigned long) ipr_cmd;
946         ipr_cmd->timer.expires = jiffies + timeout;
947         ipr_cmd->timer.function = (void (*)(unsigned long))timeout_func;
948 
949         add_timer(&ipr_cmd->timer);
950 
951         ipr_trc_hook(ipr_cmd, IPR_TRACE_START, 0);
952 
953         ipr_send_command(ipr_cmd);
954 }
955 
956 /**
957  * ipr_internal_cmd_done - Op done function for an internally generated op.
958  * @ipr_cmd:    ipr command struct
959  *
960  * This function is the op done function for an internally generated,
961  * blocking op. It simply wakes the sleeping thread.
962  *
963  * Return value:
964  *      none
965  **/
966 static void ipr_internal_cmd_done(struct ipr_cmnd *ipr_cmd)
967 {
968         if (ipr_cmd->sibling)
969                 ipr_cmd->sibling = NULL;
970         else
971                 complete(&ipr_cmd->completion);
972 }
973 
974 /**
975  * ipr_init_ioadl - initialize the ioadl for the correct SIS type
976  * @ipr_cmd:    ipr command struct
977  * @dma_addr:   dma address
978  * @len:        transfer length
979  * @flags:      ioadl flag value
980  *
981  * This function initializes an ioadl in the case where there is only a single
982  * descriptor.
983  *
984  * Return value:
985  *      nothing
986  **/
987 static void ipr_init_ioadl(struct ipr_cmnd *ipr_cmd, dma_addr_t dma_addr,
988                            u32 len, int flags)
989 {
990         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
991         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
992 
993         ipr_cmd->dma_use_sg = 1;
994 
995         if (ipr_cmd->ioa_cfg->sis64) {
996                 ioadl64->flags = cpu_to_be32(flags);
997                 ioadl64->data_len = cpu_to_be32(len);
998                 ioadl64->address = cpu_to_be64(dma_addr);
999 
1000                 ipr_cmd->ioarcb.ioadl_len =
1001                         cpu_to_be32(sizeof(struct ipr_ioadl64_desc));
1002                 ipr_cmd->ioarcb.data_transfer_length = cpu_to_be32(len);
1003         } else {
1004                 ioadl->flags_and_data_len = cpu_to_be32(flags | len);
1005                 ioadl->address = cpu_to_be32(dma_addr);
1006 
1007                 if (flags == IPR_IOADL_FLAGS_READ_LAST) {
1008                         ipr_cmd->ioarcb.read_ioadl_len =
1009                                 cpu_to_be32(sizeof(struct ipr_ioadl_desc));
1010                         ipr_cmd->ioarcb.read_data_transfer_length = cpu_to_be32(len);
1011                 } else {
1012                         ipr_cmd->ioarcb.ioadl_len =
1013                                 cpu_to_be32(sizeof(struct ipr_ioadl_desc));
1014                         ipr_cmd->ioarcb.data_transfer_length = cpu_to_be32(len);
1015                 }
1016         }
1017 }
1018 
1019 /**
1020  * ipr_send_blocking_cmd - Send command and sleep on its completion.
1021  * @ipr_cmd:    ipr command struct
1022  * @timeout_func:       function to invoke if command times out
1023  * @timeout:    timeout
1024  *
1025  * Return value:
1026  *      none
1027  **/
1028 static void ipr_send_blocking_cmd(struct ipr_cmnd *ipr_cmd,
1029                                   void (*timeout_func) (struct ipr_cmnd *ipr_cmd),
1030                                   u32 timeout)
1031 {
1032         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
1033 
1034         init_completion(&ipr_cmd->completion);
1035         ipr_do_req(ipr_cmd, ipr_internal_cmd_done, timeout_func, timeout);
1036 
1037         spin_unlock_irq(ioa_cfg->host->host_lock);
1038         wait_for_completion(&ipr_cmd->completion);
1039         spin_lock_irq(ioa_cfg->host->host_lock);
1040 }
1041 
1042 static int ipr_get_hrrq_index(struct ipr_ioa_cfg *ioa_cfg)
1043 {
1044         if (ioa_cfg->hrrq_num == 1)
1045                 return 0;
1046         else
1047                 return (atomic_add_return(1, &ioa_cfg->hrrq_index) % (ioa_cfg->hrrq_num - 1)) + 1;
1048 }
1049 
1050 /**
1051  * ipr_send_hcam - Send an HCAM to the adapter.
1052  * @ioa_cfg:    ioa config struct
1053  * @type:               HCAM type
1054  * @hostrcb:    hostrcb struct
1055  *
1056  * This function will send a Host Controlled Async command to the adapter.
1057  * If HCAMs are currently not allowed to be issued to the adapter, it will
1058  * place the hostrcb on the free queue.
1059  *
1060  * Return value:
1061  *      none
1062  **/
1063 static void ipr_send_hcam(struct ipr_ioa_cfg *ioa_cfg, u8 type,
1064                           struct ipr_hostrcb *hostrcb)
1065 {
1066         struct ipr_cmnd *ipr_cmd;
1067         struct ipr_ioarcb *ioarcb;
1068 
1069         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds) {
1070                 ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
1071                 list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
1072                 list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_pending_q);
1073 
1074                 ipr_cmd->u.hostrcb = hostrcb;
1075                 ioarcb = &ipr_cmd->ioarcb;
1076 
1077                 ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
1078                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_HCAM;
1079                 ioarcb->cmd_pkt.cdb[0] = IPR_HOST_CONTROLLED_ASYNC;
1080                 ioarcb->cmd_pkt.cdb[1] = type;
1081                 ioarcb->cmd_pkt.cdb[7] = (sizeof(hostrcb->hcam) >> 8) & 0xff;
1082                 ioarcb->cmd_pkt.cdb[8] = sizeof(hostrcb->hcam) & 0xff;
1083 
1084                 ipr_init_ioadl(ipr_cmd, hostrcb->hostrcb_dma,
1085                                sizeof(hostrcb->hcam), IPR_IOADL_FLAGS_READ_LAST);
1086 
1087                 if (type == IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE)
1088                         ipr_cmd->done = ipr_process_ccn;
1089                 else
1090                         ipr_cmd->done = ipr_process_error;
1091 
1092                 ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_IOA_RES_ADDR);
1093 
1094                 ipr_send_command(ipr_cmd);
1095         } else {
1096                 list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_free_q);
1097         }
1098 }
1099 
1100 /**
1101  * ipr_update_ata_class - Update the ata class in the resource entry
1102  * @res:        resource entry struct
1103  * @proto:      cfgte device bus protocol value
1104  *
1105  * Return value:
1106  *      none
1107  **/
1108 static void ipr_update_ata_class(struct ipr_resource_entry *res, unsigned int proto)
1109 {
1110         switch (proto) {
1111         case IPR_PROTO_SATA:
1112         case IPR_PROTO_SAS_STP:
1113                 res->ata_class = ATA_DEV_ATA;
1114                 break;
1115         case IPR_PROTO_SATA_ATAPI:
1116         case IPR_PROTO_SAS_STP_ATAPI:
1117                 res->ata_class = ATA_DEV_ATAPI;
1118                 break;
1119         default:
1120                 res->ata_class = ATA_DEV_UNKNOWN;
1121                 break;
1122         };
1123 }
1124 
1125 /**
1126  * ipr_init_res_entry - Initialize a resource entry struct.
1127  * @res:        resource entry struct
1128  * @cfgtew:     config table entry wrapper struct
1129  *
1130  * Return value:
1131  *      none
1132  **/
1133 static void ipr_init_res_entry(struct ipr_resource_entry *res,
1134                                struct ipr_config_table_entry_wrapper *cfgtew)
1135 {
1136         int found = 0;
1137         unsigned int proto;
1138         struct ipr_ioa_cfg *ioa_cfg = res->ioa_cfg;
1139         struct ipr_resource_entry *gscsi_res = NULL;
1140 
1141         res->needs_sync_complete = 0;
1142         res->in_erp = 0;
1143         res->add_to_ml = 0;
1144         res->del_from_ml = 0;
1145         res->resetting_device = 0;
1146         res->sdev = NULL;
1147         res->sata_port = NULL;
1148 
1149         if (ioa_cfg->sis64) {
1150                 proto = cfgtew->u.cfgte64->proto;
1151                 res->res_flags = cfgtew->u.cfgte64->res_flags;
1152                 res->qmodel = IPR_QUEUEING_MODEL64(res);
1153                 res->type = cfgtew->u.cfgte64->res_type;
1154 
1155                 memcpy(res->res_path, &cfgtew->u.cfgte64->res_path,
1156                         sizeof(res->res_path));
1157 
1158                 res->bus = 0;
1159                 memcpy(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1160                         sizeof(res->dev_lun.scsi_lun));
1161                 res->lun = scsilun_to_int(&res->dev_lun);
1162 
1163                 if (res->type == IPR_RES_TYPE_GENERIC_SCSI) {
1164                         list_for_each_entry(gscsi_res, &ioa_cfg->used_res_q, queue) {
1165                                 if (gscsi_res->dev_id == cfgtew->u.cfgte64->dev_id) {
1166                                         found = 1;
1167                                         res->target = gscsi_res->target;
1168                                         break;
1169                                 }
1170                         }
1171                         if (!found) {
1172                                 res->target = find_first_zero_bit(ioa_cfg->target_ids,
1173                                                                   ioa_cfg->max_devs_supported);
1174                                 set_bit(res->target, ioa_cfg->target_ids);
1175                         }
1176                 } else if (res->type == IPR_RES_TYPE_IOAFP) {
1177                         res->bus = IPR_IOAFP_VIRTUAL_BUS;
1178                         res->target = 0;
1179                 } else if (res->type == IPR_RES_TYPE_ARRAY) {
1180                         res->bus = IPR_ARRAY_VIRTUAL_BUS;
1181                         res->target = find_first_zero_bit(ioa_cfg->array_ids,
1182                                                           ioa_cfg->max_devs_supported);
1183                         set_bit(res->target, ioa_cfg->array_ids);
1184                 } else if (res->type == IPR_RES_TYPE_VOLUME_SET) {
1185                         res->bus = IPR_VSET_VIRTUAL_BUS;
1186                         res->target = find_first_zero_bit(ioa_cfg->vset_ids,
1187                                                           ioa_cfg->max_devs_supported);
1188                         set_bit(res->target, ioa_cfg->vset_ids);
1189                 } else {
1190                         res->target = find_first_zero_bit(ioa_cfg->target_ids,
1191                                                           ioa_cfg->max_devs_supported);
1192                         set_bit(res->target, ioa_cfg->target_ids);
1193                 }
1194         } else {
1195                 proto = cfgtew->u.cfgte->proto;
1196                 res->qmodel = IPR_QUEUEING_MODEL(res);
1197                 res->flags = cfgtew->u.cfgte->flags;
1198                 if (res->flags & IPR_IS_IOA_RESOURCE)
1199                         res->type = IPR_RES_TYPE_IOAFP;
1200                 else
1201                         res->type = cfgtew->u.cfgte->rsvd_subtype & 0x0f;
1202 
1203                 res->bus = cfgtew->u.cfgte->res_addr.bus;
1204                 res->target = cfgtew->u.cfgte->res_addr.target;
1205                 res->lun = cfgtew->u.cfgte->res_addr.lun;
1206                 res->lun_wwn = get_unaligned_be64(cfgtew->u.cfgte->lun_wwn);
1207         }
1208 
1209         ipr_update_ata_class(res, proto);
1210 }
1211 
1212 /**
1213  * ipr_is_same_device - Determine if two devices are the same.
1214  * @res:        resource entry struct
1215  * @cfgtew:     config table entry wrapper struct
1216  *
1217  * Return value:
1218  *      1 if the devices are the same / 0 otherwise
1219  **/
1220 static int ipr_is_same_device(struct ipr_resource_entry *res,
1221                               struct ipr_config_table_entry_wrapper *cfgtew)
1222 {
1223         if (res->ioa_cfg->sis64) {
1224                 if (!memcmp(&res->dev_id, &cfgtew->u.cfgte64->dev_id,
1225                                         sizeof(cfgtew->u.cfgte64->dev_id)) &&
1226                         !memcmp(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1227                                         sizeof(cfgtew->u.cfgte64->lun))) {
1228                         return 1;
1229                 }
1230         } else {
1231                 if (res->bus == cfgtew->u.cfgte->res_addr.bus &&
1232                     res->target == cfgtew->u.cfgte->res_addr.target &&
1233                     res->lun == cfgtew->u.cfgte->res_addr.lun)
1234                         return 1;
1235         }
1236 
1237         return 0;
1238 }
1239 
1240 /**
1241  * __ipr_format_res_path - Format the resource path for printing.
1242  * @res_path:   resource path
1243  * @buf:        buffer
1244  * @len:        length of buffer provided
1245  *
1246  * Return value:
1247  *      pointer to buffer
1248  **/
1249 static char *__ipr_format_res_path(u8 *res_path, char *buffer, int len)
1250 {
1251         int i;
1252         char *p = buffer;
1253 
1254         *p = '\0';
1255         p += snprintf(p, buffer + len - p, "%02X", res_path[0]);
1256         for (i = 1; res_path[i] != 0xff && ((i * 3) < len); i++)
1257                 p += snprintf(p, buffer + len - p, "-%02X", res_path[i]);
1258 
1259         return buffer;
1260 }
1261 
1262 /**
1263  * ipr_format_res_path - Format the resource path for printing.
1264  * @ioa_cfg:    ioa config struct
1265  * @res_path:   resource path
1266  * @buf:        buffer
1267  * @len:        length of buffer provided
1268  *
1269  * Return value:
1270  *      pointer to buffer
1271  **/
1272 static char *ipr_format_res_path(struct ipr_ioa_cfg *ioa_cfg,
1273                                  u8 *res_path, char *buffer, int len)
1274 {
1275         char *p = buffer;
1276 
1277         *p = '\0';
1278         p += snprintf(p, buffer + len - p, "%d/", ioa_cfg->host->host_no);
1279         __ipr_format_res_path(res_path, p, len - (buffer - p));
1280         return buffer;
1281 }
1282 
1283 /**
1284  * ipr_update_res_entry - Update the resource entry.
1285  * @res:        resource entry struct
1286  * @cfgtew:     config table entry wrapper struct
1287  *
1288  * Return value:
1289  *      none
1290  **/
1291 static void ipr_update_res_entry(struct ipr_resource_entry *res,
1292                                  struct ipr_config_table_entry_wrapper *cfgtew)
1293 {
1294         char buffer[IPR_MAX_RES_PATH_LENGTH];
1295         unsigned int proto;
1296         int new_path = 0;
1297 
1298         if (res->ioa_cfg->sis64) {
1299                 res->flags = cfgtew->u.cfgte64->flags;
1300                 res->res_flags = cfgtew->u.cfgte64->res_flags;
1301                 res->type = cfgtew->u.cfgte64->res_type;
1302 
1303                 memcpy(&res->std_inq_data, &cfgtew->u.cfgte64->std_inq_data,
1304                         sizeof(struct ipr_std_inq_data));
1305 
1306                 res->qmodel = IPR_QUEUEING_MODEL64(res);
1307                 proto = cfgtew->u.cfgte64->proto;
1308                 res->res_handle = cfgtew->u.cfgte64->res_handle;
1309                 res->dev_id = cfgtew->u.cfgte64->dev_id;
1310 
1311                 memcpy(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1312                         sizeof(res->dev_lun.scsi_lun));
1313 
1314                 if (memcmp(res->res_path, &cfgtew->u.cfgte64->res_path,
1315                                         sizeof(res->res_path))) {
1316                         memcpy(res->res_path, &cfgtew->u.cfgte64->res_path,
1317                                 sizeof(res->res_path));
1318                         new_path = 1;
1319                 }
1320 
1321                 if (res->sdev && new_path)
1322                         sdev_printk(KERN_INFO, res->sdev, "Resource path: %s\n",
1323                                     ipr_format_res_path(res->ioa_cfg,
1324                                         res->res_path, buffer, sizeof(buffer)));
1325         } else {
1326                 res->flags = cfgtew->u.cfgte->flags;
1327                 if (res->flags & IPR_IS_IOA_RESOURCE)
1328                         res->type = IPR_RES_TYPE_IOAFP;
1329                 else
1330                         res->type = cfgtew->u.cfgte->rsvd_subtype & 0x0f;
1331 
1332                 memcpy(&res->std_inq_data, &cfgtew->u.cfgte->std_inq_data,
1333                         sizeof(struct ipr_std_inq_data));
1334 
1335                 res->qmodel = IPR_QUEUEING_MODEL(res);
1336                 proto = cfgtew->u.cfgte->proto;
1337                 res->res_handle = cfgtew->u.cfgte->res_handle;
1338         }
1339 
1340         ipr_update_ata_class(res, proto);
1341 }
1342 
1343 /**
1344  * ipr_clear_res_target - Clear the bit in the bit map representing the target
1345  *                        for the resource.
1346  * @res:        resource entry struct
1347  * @cfgtew:     config table entry wrapper struct
1348  *
1349  * Return value:
1350  *      none
1351  **/
1352 static void ipr_clear_res_target(struct ipr_resource_entry *res)
1353 {
1354         struct ipr_resource_entry *gscsi_res = NULL;
1355         struct ipr_ioa_cfg *ioa_cfg = res->ioa_cfg;
1356 
1357         if (!ioa_cfg->sis64)
1358                 return;
1359 
1360         if (res->bus == IPR_ARRAY_VIRTUAL_BUS)
1361                 clear_bit(res->target, ioa_cfg->array_ids);
1362         else if (res->bus == IPR_VSET_VIRTUAL_BUS)
1363                 clear_bit(res->target, ioa_cfg->vset_ids);
1364         else if (res->bus == 0 && res->type == IPR_RES_TYPE_GENERIC_SCSI) {
1365                 list_for_each_entry(gscsi_res, &ioa_cfg->used_res_q, queue)
1366                         if (gscsi_res->dev_id == res->dev_id && gscsi_res != res)
1367                                 return;
1368                 clear_bit(res->target, ioa_cfg->target_ids);
1369 
1370         } else if (res->bus == 0)
1371                 clear_bit(res->target, ioa_cfg->target_ids);
1372 }
1373 
1374 /**
1375  * ipr_handle_config_change - Handle a config change from the adapter
1376  * @ioa_cfg:    ioa config struct
1377  * @hostrcb:    hostrcb
1378  *
1379  * Return value:
1380  *      none
1381  **/
1382 static void ipr_handle_config_change(struct ipr_ioa_cfg *ioa_cfg,
1383                                      struct ipr_hostrcb *hostrcb)
1384 {
1385         struct ipr_resource_entry *res = NULL;
1386         struct ipr_config_table_entry_wrapper cfgtew;
1387         __be32 cc_res_handle;
1388 
1389         u32 is_ndn = 1;
1390 
1391         if (ioa_cfg->sis64) {
1392                 cfgtew.u.cfgte64 = &hostrcb->hcam.u.ccn.u.cfgte64;
1393                 cc_res_handle = cfgtew.u.cfgte64->res_handle;
1394         } else {
1395                 cfgtew.u.cfgte = &hostrcb->hcam.u.ccn.u.cfgte;
1396                 cc_res_handle = cfgtew.u.cfgte->res_handle;
1397         }
1398 
1399         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
1400                 if (res->res_handle == cc_res_handle) {
1401                         is_ndn = 0;
1402                         break;
1403                 }
1404         }
1405 
1406         if (is_ndn) {
1407                 if (list_empty(&ioa_cfg->free_res_q)) {
1408                         ipr_send_hcam(ioa_cfg,
1409                                       IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE,
1410                                       hostrcb);
1411                         return;
1412                 }
1413 
1414                 res = list_entry(ioa_cfg->free_res_q.next,
1415                                  struct ipr_resource_entry, queue);
1416 
1417                 list_del(&res->queue);
1418                 ipr_init_res_entry(res, &cfgtew);
1419                 list_add_tail(&res->queue, &ioa_cfg->used_res_q);
1420         }
1421 
1422         ipr_update_res_entry(res, &cfgtew);
1423 
1424         if (hostrcb->hcam.notify_type == IPR_HOST_RCB_NOTIF_TYPE_REM_ENTRY) {
1425                 if (res->sdev) {
1426                         res->del_from_ml = 1;
1427                         res->res_handle = IPR_INVALID_RES_HANDLE;
1428                         if (ioa_cfg->allow_ml_add_del)
1429                                 schedule_work(&ioa_cfg->work_q);
1430                 } else {
1431                         ipr_clear_res_target(res);
1432                         list_move_tail(&res->queue, &ioa_cfg->free_res_q);
1433                 }
1434         } else if (!res->sdev || res->del_from_ml) {
1435                 res->add_to_ml = 1;
1436                 if (ioa_cfg->allow_ml_add_del)
1437                         schedule_work(&ioa_cfg->work_q);
1438         }
1439 
1440         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
1441 }
1442 
1443 /**
1444  * ipr_process_ccn - Op done function for a CCN.
1445  * @ipr_cmd:    ipr command struct
1446  *
1447  * This function is the op done function for a configuration
1448  * change notification host controlled async from the adapter.
1449  *
1450  * Return value:
1451  *      none
1452  **/
1453 static void ipr_process_ccn(struct ipr_cmnd *ipr_cmd)
1454 {
1455         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
1456         struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
1457         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
1458 
1459         list_del(&hostrcb->queue);
1460         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
1461 
1462         if (ioasc) {
1463                 if (ioasc != IPR_IOASC_IOA_WAS_RESET)
1464                         dev_err(&ioa_cfg->pdev->dev,
1465                                 "Host RCB failed with IOASC: 0x%08X\n", ioasc);
1466 
1467                 ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
1468         } else {
1469                 ipr_handle_config_change(ioa_cfg, hostrcb);
1470         }
1471 }
1472 
1473 /**
1474  * strip_and_pad_whitespace - Strip and pad trailing whitespace.
1475  * @i:          index into buffer
1476  * @buf:                string to modify
1477  *
1478  * This function will strip all trailing whitespace, pad the end
1479  * of the string with a single space, and NULL terminate the string.
1480  *
1481  * Return value:
1482  *      new length of string
1483  **/
1484 static int strip_and_pad_whitespace(int i, char *buf)
1485 {
1486         while (i && buf[i] == ' ')
1487                 i--;
1488         buf[i+1] = ' ';
1489         buf[i+2] = '\0';
1490         return i + 2;
1491 }
1492 
1493 /**
1494  * ipr_log_vpd_compact - Log the passed extended VPD compactly.
1495  * @prefix:             string to print at start of printk
1496  * @hostrcb:    hostrcb pointer
1497  * @vpd:                vendor/product id/sn struct
1498  *
1499  * Return value:
1500  *      none
1501  **/
1502 static void ipr_log_vpd_compact(char *prefix, struct ipr_hostrcb *hostrcb,
1503                                 struct ipr_vpd *vpd)
1504 {
1505         char buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN + IPR_SERIAL_NUM_LEN + 3];
1506         int i = 0;
1507 
1508         memcpy(buffer, vpd->vpids.vendor_id, IPR_VENDOR_ID_LEN);
1509         i = strip_and_pad_whitespace(IPR_VENDOR_ID_LEN - 1, buffer);
1510 
1511         memcpy(&buffer[i], vpd->vpids.product_id, IPR_PROD_ID_LEN);
1512         i = strip_and_pad_whitespace(i + IPR_PROD_ID_LEN - 1, buffer);
1513 
1514         memcpy(&buffer[i], vpd->sn, IPR_SERIAL_NUM_LEN);
1515         buffer[IPR_SERIAL_NUM_LEN + i] = '\0';
1516 
1517         ipr_hcam_err(hostrcb, "%s VPID/SN: %s\n", prefix, buffer);
1518 }
1519 
1520 /**
1521  * ipr_log_vpd - Log the passed VPD to the error log.
1522  * @vpd:                vendor/product id/sn struct
1523  *
1524  * Return value:
1525  *      none
1526  **/
1527 static void ipr_log_vpd(struct ipr_vpd *vpd)
1528 {
1529         char buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN
1530                     + IPR_SERIAL_NUM_LEN];
1531 
1532         memcpy(buffer, vpd->vpids.vendor_id, IPR_VENDOR_ID_LEN);
1533         memcpy(buffer + IPR_VENDOR_ID_LEN, vpd->vpids.product_id,
1534                IPR_PROD_ID_LEN);
1535         buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN] = '\0';
1536         ipr_err("Vendor/Product ID: %s\n", buffer);
1537 
1538         memcpy(buffer, vpd->sn, IPR_SERIAL_NUM_LEN);
1539         buffer[IPR_SERIAL_NUM_LEN] = '\0';
1540         ipr_err("    Serial Number: %s\n", buffer);
1541 }
1542 
1543 /**
1544  * ipr_log_ext_vpd_compact - Log the passed extended VPD compactly.
1545  * @prefix:             string to print at start of printk
1546  * @hostrcb:    hostrcb pointer
1547  * @vpd:                vendor/product id/sn/wwn struct
1548  *
1549  * Return value:
1550  *      none
1551  **/
1552 static void ipr_log_ext_vpd_compact(char *prefix, struct ipr_hostrcb *hostrcb,
1553                                     struct ipr_ext_vpd *vpd)
1554 {
1555         ipr_log_vpd_compact(prefix, hostrcb, &vpd->vpd);
1556         ipr_hcam_err(hostrcb, "%s WWN: %08X%08X\n", prefix,
1557                      be32_to_cpu(vpd->wwid[0]), be32_to_cpu(vpd->wwid[1]));
1558 }
1559 
1560 /**
1561  * ipr_log_ext_vpd - Log the passed extended VPD to the error log.
1562  * @vpd:                vendor/product id/sn/wwn struct
1563  *
1564  * Return value:
1565  *      none
1566  **/
1567 static void ipr_log_ext_vpd(struct ipr_ext_vpd *vpd)
1568 {
1569         ipr_log_vpd(&vpd->vpd);
1570         ipr_err("    WWN: %08X%08X\n", be32_to_cpu(vpd->wwid[0]),
1571                 be32_to_cpu(vpd->wwid[1]));
1572 }
1573 
1574 /**
1575  * ipr_log_enhanced_cache_error - Log a cache error.
1576  * @ioa_cfg:    ioa config struct
1577  * @hostrcb:    hostrcb struct
1578  *
1579  * Return value:
1580  *      none
1581  **/
1582 static void ipr_log_enhanced_cache_error(struct ipr_ioa_cfg *ioa_cfg,
1583                                          struct ipr_hostrcb *hostrcb)
1584 {
1585         struct ipr_hostrcb_type_12_error *error;
1586 
1587         if (ioa_cfg->sis64)
1588                 error = &hostrcb->hcam.u.error64.u.type_12_error;
1589         else
1590                 error = &hostrcb->hcam.u.error.u.type_12_error;
1591 
1592         ipr_err("-----Current Configuration-----\n");
1593         ipr_err("Cache Directory Card Information:\n");
1594         ipr_log_ext_vpd(&error->ioa_vpd);
1595         ipr_err("Adapter Card Information:\n");
1596         ipr_log_ext_vpd(&error->cfc_vpd);
1597 
1598         ipr_err("-----Expected Configuration-----\n");
1599         ipr_err("Cache Directory Card Information:\n");
1600         ipr_log_ext_vpd(&error->ioa_last_attached_to_cfc_vpd);
1601         ipr_err("Adapter Card Information:\n");
1602         ipr_log_ext_vpd(&error->cfc_last_attached_to_ioa_vpd);
1603 
1604         ipr_err("Additional IOA Data: %08X %08X %08X\n",
1605                      be32_to_cpu(error->ioa_data[0]),
1606                      be32_to_cpu(error->ioa_data[1]),
1607                      be32_to_cpu(error->ioa_data[2]));
1608 }
1609 
1610 /**
1611  * ipr_log_cache_error - Log a cache error.
1612  * @ioa_cfg:    ioa config struct
1613  * @hostrcb:    hostrcb struct
1614  *
1615  * Return value:
1616  *      none
1617  **/
1618 static void ipr_log_cache_error(struct ipr_ioa_cfg *ioa_cfg,
1619                                 struct ipr_hostrcb *hostrcb)
1620 {
1621         struct ipr_hostrcb_type_02_error *error =
1622                 &hostrcb->hcam.u.error.u.type_02_error;
1623 
1624         ipr_err("-----Current Configuration-----\n");
1625         ipr_err("Cache Directory Card Information:\n");
1626         ipr_log_vpd(&error->ioa_vpd);
1627         ipr_err("Adapter Card Information:\n");
1628         ipr_log_vpd(&error->cfc_vpd);
1629 
1630         ipr_err("-----Expected Configuration-----\n");
1631         ipr_err("Cache Directory Card Information:\n");
1632         ipr_log_vpd(&error->ioa_last_attached_to_cfc_vpd);
1633         ipr_err("Adapter Card Information:\n");
1634         ipr_log_vpd(&error->cfc_last_attached_to_ioa_vpd);
1635 
1636         ipr_err("Additional IOA Data: %08X %08X %08X\n",
1637                      be32_to_cpu(error->ioa_data[0]),
1638                      be32_to_cpu(error->ioa_data[1]),
1639                      be32_to_cpu(error->ioa_data[2]));
1640 }
1641 
1642 /**
1643  * ipr_log_enhanced_config_error - Log a configuration error.
1644  * @ioa_cfg:    ioa config struct
1645  * @hostrcb:    hostrcb struct
1646  *
1647  * Return value:
1648  *      none
1649  **/
1650 static void ipr_log_enhanced_config_error(struct ipr_ioa_cfg *ioa_cfg,
1651                                           struct ipr_hostrcb *hostrcb)
1652 {
1653         int errors_logged, i;
1654         struct ipr_hostrcb_device_data_entry_enhanced *dev_entry;
1655         struct ipr_hostrcb_type_13_error *error;
1656 
1657         error = &hostrcb->hcam.u.error.u.type_13_error;
1658         errors_logged = be32_to_cpu(error->errors_logged);
1659 
1660         ipr_err("Device Errors Detected/Logged: %d/%d\n",
1661                 be32_to_cpu(error->errors_detected), errors_logged);
1662 
1663         dev_entry = error->dev;
1664 
1665         for (i = 0; i < errors_logged; i++, dev_entry++) {
1666                 ipr_err_separator;
1667 
1668                 ipr_phys_res_err(ioa_cfg, dev_entry->dev_res_addr, "Device %d", i + 1);
1669                 ipr_log_ext_vpd(&dev_entry->vpd);
1670 
1671                 ipr_err("-----New Device Information-----\n");
1672                 ipr_log_ext_vpd(&dev_entry->new_vpd);
1673 
1674                 ipr_err("Cache Directory Card Information:\n");
1675                 ipr_log_ext_vpd(&dev_entry->ioa_last_with_dev_vpd);
1676 
1677                 ipr_err("Adapter Card Information:\n");
1678                 ipr_log_ext_vpd(&dev_entry->cfc_last_with_dev_vpd);
1679         }
1680 }
1681 
1682 /**
1683  * ipr_log_sis64_config_error - Log a device error.
1684  * @ioa_cfg:    ioa config struct
1685  * @hostrcb:    hostrcb struct
1686  *
1687  * Return value:
1688  *      none
1689  **/
1690 static void ipr_log_sis64_config_error(struct ipr_ioa_cfg *ioa_cfg,
1691                                        struct ipr_hostrcb *hostrcb)
1692 {
1693         int errors_logged, i;
1694         struct ipr_hostrcb64_device_data_entry_enhanced *dev_entry;
1695         struct ipr_hostrcb_type_23_error *error;
1696         char buffer[IPR_MAX_RES_PATH_LENGTH];
1697 
1698         error = &hostrcb->hcam.u.error64.u.type_23_error;
1699         errors_logged = be32_to_cpu(error->errors_logged);
1700 
1701         ipr_err("Device Errors Detected/Logged: %d/%d\n",
1702                 be32_to_cpu(error->errors_detected), errors_logged);
1703 
1704         dev_entry = error->dev;
1705 
1706         for (i = 0; i < errors_logged; i++, dev_entry++) {
1707                 ipr_err_separator;
1708 
1709                 ipr_err("Device %d : %s", i + 1,
1710                         __ipr_format_res_path(dev_entry->res_path,
1711                                               buffer, sizeof(buffer)));
1712                 ipr_log_ext_vpd(&dev_entry->vpd);
1713 
1714                 ipr_err("-----New Device Information-----\n");
1715                 ipr_log_ext_vpd(&dev_entry->new_vpd);
1716 
1717                 ipr_err("Cache Directory Card Information:\n");
1718                 ipr_log_ext_vpd(&dev_entry->ioa_last_with_dev_vpd);
1719 
1720                 ipr_err("Adapter Card Information:\n");
1721                 ipr_log_ext_vpd(&dev_entry->cfc_last_with_dev_vpd);
1722         }
1723 }
1724 
1725 /**
1726  * ipr_log_config_error - Log a configuration error.
1727  * @ioa_cfg:    ioa config struct
1728  * @hostrcb:    hostrcb struct
1729  *
1730  * Return value:
1731  *      none
1732  **/
1733 static void ipr_log_config_error(struct ipr_ioa_cfg *ioa_cfg,
1734                                  struct ipr_hostrcb *hostrcb)
1735 {
1736         int errors_logged, i;
1737         struct ipr_hostrcb_device_data_entry *dev_entry;
1738         struct ipr_hostrcb_type_03_error *error;
1739 
1740         error = &hostrcb->hcam.u.error.u.type_03_error;
1741         errors_logged = be32_to_cpu(error->errors_logged);
1742 
1743         ipr_err("Device Errors Detected/Logged: %d/%d\n",
1744                 be32_to_cpu(error->errors_detected), errors_logged);
1745 
1746         dev_entry = error->dev;
1747 
1748         for (i = 0; i < errors_logged; i++, dev_entry++) {
1749                 ipr_err_separator;
1750 
1751                 ipr_phys_res_err(ioa_cfg, dev_entry->dev_res_addr, "Device %d", i + 1);
1752                 ipr_log_vpd(&dev_entry->vpd);
1753 
1754                 ipr_err("-----New Device Information-----\n");
1755                 ipr_log_vpd(&dev_entry->new_vpd);
1756 
1757                 ipr_err("Cache Directory Card Information:\n");
1758                 ipr_log_vpd(&dev_entry->ioa_last_with_dev_vpd);
1759 
1760                 ipr_err("Adapter Card Information:\n");
1761                 ipr_log_vpd(&dev_entry->cfc_last_with_dev_vpd);
1762 
1763                 ipr_err("Additional IOA Data: %08X %08X %08X %08X %08X\n",
1764                         be32_to_cpu(dev_entry->ioa_data[0]),
1765                         be32_to_cpu(dev_entry->ioa_data[1]),
1766                         be32_to_cpu(dev_entry->ioa_data[2]),
1767                         be32_to_cpu(dev_entry->ioa_data[3]),
1768                         be32_to_cpu(dev_entry->ioa_data[4]));
1769         }
1770 }
1771 
1772 /**
1773  * ipr_log_enhanced_array_error - Log an array configuration error.
1774  * @ioa_cfg:    ioa config struct
1775  * @hostrcb:    hostrcb struct
1776  *
1777  * Return value:
1778  *      none
1779  **/
1780 static void ipr_log_enhanced_array_error(struct ipr_ioa_cfg *ioa_cfg,
1781                                          struct ipr_hostrcb *hostrcb)
1782 {
1783         int i, num_entries;
1784         struct ipr_hostrcb_type_14_error *error;
1785         struct ipr_hostrcb_array_data_entry_enhanced *array_entry;
1786         const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '' };
1787 
1788         error = &hostrcb->hcam.u.error.u.type_14_error;
1789 
1790         ipr_err_separator;
1791 
1792         ipr_err("RAID %s Array Configuration: %d:%d:%d:%d\n",
1793                 error->protection_level,
1794                 ioa_cfg->host->host_no,
1795                 error->last_func_vset_res_addr.bus,
1796                 error->last_func_vset_res_addr.target,
1797                 error->last_func_vset_res_addr.lun);
1798 
1799         ipr_err_separator;
1800 
1801         array_entry = error->array_member;
1802         num_entries = min_t(u32, be32_to_cpu(error->num_entries),
1803                             ARRAY_SIZE(error->array_member));
1804 
1805         for (i = 0; i < num_entries; i++, array_entry++) {
1806                 if (!memcmp(array_entry->vpd.vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
1807                         continue;
1808 
1809                 if (be32_to_cpu(error->exposed_mode_adn) == i)
1810                         ipr_err("Exposed Array Member %d:\n", i);
1811                 else
1812                         ipr_err("Array Member %d:\n", i);
1813 
1814                 ipr_log_ext_vpd(&array_entry->vpd);
1815                 ipr_phys_res_err(ioa_cfg, array_entry->dev_res_addr, "Current Location");
1816                 ipr_phys_res_err(ioa_cfg, array_entry->expected_dev_res_addr,
1817                                  "Expected Location");
1818 
1819                 ipr_err_separator;
1820         }
1821 }
1822 
1823 /**
1824  * ipr_log_array_error - Log an array configuration error.
1825  * @ioa_cfg:    ioa config struct
1826  * @hostrcb:    hostrcb struct
1827  *
1828  * Return value:
1829  *      none
1830  **/
1831 static void ipr_log_array_error(struct ipr_ioa_cfg *ioa_cfg,
1832                                 struct ipr_hostrcb *hostrcb)
1833 {
1834         int i;
1835         struct ipr_hostrcb_type_04_error *error;
1836         struct ipr_hostrcb_array_data_entry *array_entry;
1837         const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '' };
1838 
1839         error = &hostrcb->hcam.u.error.u.type_04_error;
1840 
1841         ipr_err_separator;
1842 
1843         ipr_err("RAID %s Array Configuration: %d:%d:%d:%d\n",
1844                 error->protection_level,
1845                 ioa_cfg->host->host_no,
1846                 error->last_func_vset_res_addr.bus,
1847                 error->last_func_vset_res_addr.target,
1848                 error->last_func_vset_res_addr.lun);
1849 
1850         ipr_err_separator;
1851 
1852         array_entry = error->array_member;
1853 
1854         for (i = 0; i < 18; i++) {
1855                 if (!memcmp(array_entry->vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
1856                         continue;
1857 
1858                 if (be32_to_cpu(error->exposed_mode_adn) == i)
1859                         ipr_err("Exposed Array Member %d:\n", i);
1860                 else
1861                         ipr_err("Array Member %d:\n", i);
1862 
1863                 ipr_log_vpd(&array_entry->vpd);
1864 
1865                 ipr_phys_res_err(ioa_cfg, array_entry->dev_res_addr, "Current Location");
1866                 ipr_phys_res_err(ioa_cfg, array_entry->expected_dev_res_addr,
1867                                  "Expected Location");
1868 
1869                 ipr_err_separator;
1870 
1871                 if (i == 9)
1872                         array_entry = error->array_member2;
1873                 else
1874                         array_entry++;
1875         }
1876 }
1877 
1878 /**
1879  * ipr_log_hex_data - Log additional hex IOA error data.
1880  * @ioa_cfg:    ioa config struct
1881  * @data:               IOA error data
1882  * @len:                data length
1883  *
1884  * Return value:
1885  *      none
1886  **/
1887 static void ipr_log_hex_data(struct ipr_ioa_cfg *ioa_cfg, u32 *data, int len)
1888 {
1889         int i;
1890 
1891         if (len == 0)
1892                 return;
1893 
1894         if (ioa_cfg->log_level <= IPR_DEFAULT_LOG_LEVEL)
1895                 len = min_t(int, len, IPR_DEFAULT_MAX_ERROR_DUMP);
1896 
1897         for (i = 0; i < len / 4; i += 4) {
1898                 ipr_err("%08X: %08X %08X %08X %08X\n", i*4,
1899                         be32_to_cpu(data[i]),
1900                         be32_to_cpu(data[i+1]),
1901                         be32_to_cpu(data[i+2]),
1902                         be32_to_cpu(data[i+3]));
1903         }
1904 }
1905 
1906 /**
1907  * ipr_log_enhanced_dual_ioa_error - Log an enhanced dual adapter error.
1908  * @ioa_cfg:    ioa config struct
1909  * @hostrcb:    hostrcb struct
1910  *
1911  * Return value:
1912  *      none
1913  **/
1914 static void ipr_log_enhanced_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
1915                                             struct ipr_hostrcb *hostrcb)
1916 {
1917         struct ipr_hostrcb_type_17_error *error;
1918 
1919         if (ioa_cfg->sis64)
1920                 error = &hostrcb->hcam.u.error64.u.type_17_error;
1921         else
1922                 error = &hostrcb->hcam.u.error.u.type_17_error;
1923 
1924         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
1925         strim(error->failure_reason);
1926 
1927         ipr_hcam_err(hostrcb, "%s [PRC: %08X]\n", error->failure_reason,
1928                      be32_to_cpu(hostrcb->hcam.u.error.prc));
1929         ipr_log_ext_vpd_compact("Remote IOA", hostrcb, &error->vpd);
1930         ipr_log_hex_data(ioa_cfg, error->data,
1931                          be32_to_cpu(hostrcb->hcam.length) -
1932                          (offsetof(struct ipr_hostrcb_error, u) +
1933                           offsetof(struct ipr_hostrcb_type_17_error, data)));
1934 }
1935 
1936 /**
1937  * ipr_log_dual_ioa_error - Log a dual adapter error.
1938  * @ioa_cfg:    ioa config struct
1939  * @hostrcb:    hostrcb struct
1940  *
1941  * Return value:
1942  *      none
1943  **/
1944 static void ipr_log_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
1945                                    struct ipr_hostrcb *hostrcb)
1946 {
1947         struct ipr_hostrcb_type_07_error *error;
1948 
1949         error = &hostrcb->hcam.u.error.u.type_07_error;
1950         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
1951         strim(error->failure_reason);
1952 
1953         ipr_hcam_err(hostrcb, "%s [PRC: %08X]\n", error->failure_reason,
1954                      be32_to_cpu(hostrcb->hcam.u.error.prc));
1955         ipr_log_vpd_compact("Remote IOA", hostrcb, &error->vpd);
1956         ipr_log_hex_data(ioa_cfg, error->data,
1957                          be32_to_cpu(hostrcb->hcam.length) -
1958                          (offsetof(struct ipr_hostrcb_error, u) +
1959                           offsetof(struct ipr_hostrcb_type_07_error, data)));
1960 }
1961 
1962 static const struct {
1963         u8 active;
1964         char *desc;
1965 } path_active_desc[] = {
1966         { IPR_PATH_NO_INFO, "Path" },
1967         { IPR_PATH_ACTIVE, "Active path" },
1968         { IPR_PATH_NOT_ACTIVE, "Inactive path" }
1969 };
1970 
1971 static const struct {
1972         u8 state;
1973         char *desc;
1974 } path_state_desc[] = {
1975         { IPR_PATH_STATE_NO_INFO, "has no path state information available" },
1976         { IPR_PATH_HEALTHY, "is healthy" },
1977         { IPR_PATH_DEGRADED, "is degraded" },
1978         { IPR_PATH_FAILED, "is failed" }
1979 };
1980 
1981 /**
1982  * ipr_log_fabric_path - Log a fabric path error
1983  * @hostrcb:    hostrcb struct
1984  * @fabric:             fabric descriptor
1985  *
1986  * Return value:
1987  *      none
1988  **/
1989 static void ipr_log_fabric_path(struct ipr_hostrcb *hostrcb,
1990                                 struct ipr_hostrcb_fabric_desc *fabric)
1991 {
1992         int i, j;
1993         u8 path_state = fabric->path_state;
1994         u8 active = path_state & IPR_PATH_ACTIVE_MASK;
1995         u8 state = path_state & IPR_PATH_STATE_MASK;
1996 
1997         for (i = 0; i < ARRAY_SIZE(path_active_desc); i++) {
1998                 if (path_active_desc[i].active != active)
1999                         continue;
2000 
2001                 for (j = 0; j < ARRAY_SIZE(path_state_desc); j++) {
2002                         if (path_state_desc[j].state != state)
2003                                 continue;
2004 
2005                         if (fabric->cascaded_expander == 0xff && fabric->phy == 0xff) {
2006                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d\n",
2007                                              path_active_desc[i].desc, path_state_desc[j].desc,
2008                                              fabric->ioa_port);
2009                         } else if (fabric->cascaded_expander == 0xff) {
2010                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Phy=%d\n",
2011                                              path_active_desc[i].desc, path_state_desc[j].desc,
2012                                              fabric->ioa_port, fabric->phy);
2013                         } else if (fabric->phy == 0xff) {
2014                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d\n",
2015                                              path_active_desc[i].desc, path_state_desc[j].desc,
2016                                              fabric->ioa_port, fabric->cascaded_expander);
2017                         } else {
2018                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d, Phy=%d\n",
2019                                              path_active_desc[i].desc, path_state_desc[j].desc,
2020                                              fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
2021                         }
2022                         return;
2023                 }
2024         }
2025 
2026         ipr_err("Path state=%02X IOA Port=%d Cascade=%d Phy=%d\n", path_state,
2027                 fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
2028 }
2029 
2030 /**
2031  * ipr_log64_fabric_path - Log a fabric path error
2032  * @hostrcb:    hostrcb struct
2033  * @fabric:             fabric descriptor
2034  *
2035  * Return value:
2036  *      none
2037  **/
2038 static void ipr_log64_fabric_path(struct ipr_hostrcb *hostrcb,
2039                                   struct ipr_hostrcb64_fabric_desc *fabric)
2040 {
2041         int i, j;
2042         u8 path_state = fabric->path_state;
2043         u8 active = path_state & IPR_PATH_ACTIVE_MASK;
2044         u8 state = path_state & IPR_PATH_STATE_MASK;
2045         char buffer[IPR_MAX_RES_PATH_LENGTH];
2046 
2047         for (i = 0; i < ARRAY_SIZE(path_active_desc); i++) {
2048                 if (path_active_desc[i].active != active)
2049                         continue;
2050 
2051                 for (j = 0; j < ARRAY_SIZE(path_state_desc); j++) {
2052                         if (path_state_desc[j].state != state)
2053                                 continue;
2054 
2055                         ipr_hcam_err(hostrcb, "%s %s: Resource Path=%s\n",
2056                                      path_active_desc[i].desc, path_state_desc[j].desc,
2057                                      ipr_format_res_path(hostrcb->ioa_cfg,
2058                                                 fabric->res_path,
2059                                                 buffer, sizeof(buffer)));
2060                         return;
2061                 }
2062         }
2063 
2064         ipr_err("Path state=%02X Resource Path=%s\n", path_state,
2065                 ipr_format_res_path(hostrcb->ioa_cfg, fabric->res_path,
2066                                     buffer, sizeof(buffer)));
2067 }
2068 
2069 static const struct {
2070         u8 type;
2071         char *desc;
2072 } path_type_desc[] = {
2073         { IPR_PATH_CFG_IOA_PORT, "IOA port" },
2074         { IPR_PATH_CFG_EXP_PORT, "Expander port" },
2075         { IPR_PATH_CFG_DEVICE_PORT, "Device port" },
2076         { IPR_PATH_CFG_DEVICE_LUN, "Device LUN" }
2077 };
2078 
2079 static const struct {
2080         u8 status;
2081         char *desc;
2082 } path_status_desc[] = {
2083         { IPR_PATH_CFG_NO_PROB, "Functional" },
2084         { IPR_PATH_CFG_DEGRADED, "Degraded" },
2085         { IPR_PATH_CFG_FAILED, "Failed" },
2086         { IPR_PATH_CFG_SUSPECT, "Suspect" },
2087         { IPR_PATH_NOT_DETECTED, "Missing" },
2088         { IPR_PATH_INCORRECT_CONN, "Incorrectly connected" }
2089 };
2090 
2091 static const char *link_rate[] = {
2092         "unknown",
2093         "disabled",
2094         "phy reset problem",
2095         "spinup hold",
2096         "port selector",
2097         "unknown",
2098         "unknown",
2099         "unknown",
2100         "1.5Gbps",
2101         "3.0Gbps",
2102         "unknown",
2103         "unknown",
2104         "unknown",
2105         "unknown",
2106         "unknown",
2107         "unknown"
2108 };
2109 
2110 /**
2111  * ipr_log_path_elem - Log a fabric path element.
2112  * @hostrcb:    hostrcb struct
2113  * @cfg:                fabric path element struct
2114  *
2115  * Return value:
2116  *      none
2117  **/
2118 static void ipr_log_path_elem(struct ipr_hostrcb *hostrcb,
2119                               struct ipr_hostrcb_config_element *cfg)
2120 {
2121         int i, j;
2122         u8 type = cfg->type_status & IPR_PATH_CFG_TYPE_MASK;
2123         u8 status = cfg->type_status & IPR_PATH_CFG_STATUS_MASK;
2124 
2125         if (type == IPR_PATH_CFG_NOT_EXIST)
2126                 return;
2127 
2128         for (i = 0; i < ARRAY_SIZE(path_type_desc); i++) {
2129                 if (path_type_desc[i].type != type)
2130                         continue;
2131 
2132                 for (j = 0; j < ARRAY_SIZE(path_status_desc); j++) {
2133                         if (path_status_desc[j].status != status)
2134                                 continue;
2135 
2136                         if (type == IPR_PATH_CFG_IOA_PORT) {
2137                                 ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, WWN=%08X%08X\n",
2138                                              path_status_desc[j].desc, path_type_desc[i].desc,
2139                                              cfg->phy, link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2140                                              be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2141                         } else {
2142                                 if (cfg->cascaded_expander == 0xff && cfg->phy == 0xff) {
2143                                         ipr_hcam_err(hostrcb, "%s %s: Link rate=%s, WWN=%08X%08X\n",
2144                                                      path_status_desc[j].desc, path_type_desc[i].desc,
2145                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2146                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2147                                 } else if (cfg->cascaded_expander == 0xff) {
2148                                         ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, "
2149                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
2150                                                      path_type_desc[i].desc, cfg->phy,
2151                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2152                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2153                                 } else if (cfg->phy == 0xff) {
2154                                         ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Link rate=%s, "
2155                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
2156                                                      path_type_desc[i].desc, cfg->cascaded_expander,
2157                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2158                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2159                                 } else {
2160                                         ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Phy=%d, Link rate=%s "
2161                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
2162                                                      path_type_desc[i].desc, cfg->cascaded_expander, cfg->phy,
2163                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2164                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2165                                 }
2166                         }
2167                         return;
2168                 }
2169         }
2170 
2171         ipr_hcam_err(hostrcb, "Path element=%02X: Cascade=%d Phy=%d Link rate=%s "
2172                      "WWN=%08X%08X\n", cfg->type_status, cfg->cascaded_expander, cfg->phy,
2173                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2174                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2175 }
2176 
2177 /**
2178  * ipr_log64_path_elem - Log a fabric path element.
2179  * @hostrcb:    hostrcb struct
2180  * @cfg:                fabric path element struct
2181  *
2182  * Return value:
2183  *      none
2184  **/
2185 static void ipr_log64_path_elem(struct ipr_hostrcb *hostrcb,
2186                                 struct ipr_hostrcb64_config_element *cfg)
2187 {
2188         int i, j;
2189         u8 desc_id = cfg->descriptor_id & IPR_DESCRIPTOR_MASK;
2190         u8 type = cfg->type_status & IPR_PATH_CFG_TYPE_MASK;
2191         u8 status = cfg->type_status & IPR_PATH_CFG_STATUS_MASK;
2192         char buffer[IPR_MAX_RES_PATH_LENGTH];
2193 
2194         if (type == IPR_PATH_CFG_NOT_EXIST || desc_id != IPR_DESCRIPTOR_SIS64)
2195                 return;
2196 
2197         for (i = 0; i < ARRAY_SIZE(path_type_desc); i++) {
2198                 if (path_type_desc[i].type != type)
2199                         continue;
2200 
2201                 for (j = 0; j < ARRAY_SIZE(path_status_desc); j++) {
2202                         if (path_status_desc[j].status != status)
2203                                 continue;
2204 
2205                         ipr_hcam_err(hostrcb, "%s %s: Resource Path=%s, Link rate=%s, WWN=%08X%08X\n",
2206                                      path_status_desc[j].desc, path_type_desc[i].desc,
2207                                      ipr_format_res_path(hostrcb->ioa_cfg,
2208                                         cfg->res_path, buffer, sizeof(buffer)),
2209                                         link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2210                                         be32_to_cpu(cfg->wwid[0]),
2211                                         be32_to_cpu(cfg->wwid[1]));
2212                         return;
2213                 }
2214         }
2215         ipr_hcam_err(hostrcb, "Path element=%02X: Resource Path=%s, Link rate=%s "
2216                      "WWN=%08X%08X\n", cfg->type_status,
2217                      ipr_format_res_path(hostrcb->ioa_cfg,
2218                         cfg->res_path, buffer, sizeof(buffer)),
2219                         link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2220                         be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2221 }
2222 
2223 /**
2224  * ipr_log_fabric_error - Log a fabric error.
2225  * @ioa_cfg:    ioa config struct
2226  * @hostrcb:    hostrcb struct
2227  *
2228  * Return value:
2229  *      none
2230  **/
2231 static void ipr_log_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
2232                                  struct ipr_hostrcb *hostrcb)
2233 {
2234         struct ipr_hostrcb_type_20_error *error;
2235         struct ipr_hostrcb_fabric_desc *fabric;
2236         struct ipr_hostrcb_config_element *cfg;
2237         int i, add_len;
2238 
2239         error = &hostrcb->hcam.u.error.u.type_20_error;
2240         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
2241         ipr_hcam_err(hostrcb, "%s\n", error->failure_reason);
2242 
2243         add_len = be32_to_cpu(hostrcb->hcam.length) -
2244                 (offsetof(struct ipr_hostrcb_error, u) +
2245                  offsetof(struct ipr_hostrcb_type_20_error, desc));
2246 
2247         for (i = 0, fabric = error->desc; i < error->num_entries; i++) {
2248                 ipr_log_fabric_path(hostrcb, fabric);
2249                 for_each_fabric_cfg(fabric, cfg)
2250                         ipr_log_path_elem(hostrcb, cfg);
2251 
2252                 add_len -= be16_to_cpu(fabric->length);
2253                 fabric = (struct ipr_hostrcb_fabric_desc *)
2254                         ((unsigned long)fabric + be16_to_cpu(fabric->length));
2255         }
2256 
2257         ipr_log_hex_data(ioa_cfg, (u32 *)fabric, add_len);
2258 }
2259 
2260 /**
2261  * ipr_log_sis64_array_error - Log a sis64 array error.
2262  * @ioa_cfg:    ioa config struct
2263  * @hostrcb:    hostrcb struct
2264  *
2265  * Return value:
2266  *      none
2267  **/
2268 static void ipr_log_sis64_array_error(struct ipr_ioa_cfg *ioa_cfg,
2269                                       struct ipr_hostrcb *hostrcb)
2270 {
2271         int i, num_entries;
2272         struct ipr_hostrcb_type_24_error *error;
2273         struct ipr_hostrcb64_array_data_entry *array_entry;
2274         char buffer[IPR_MAX_RES_PATH_LENGTH];
2275         const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '' };
2276 
2277         error = &hostrcb->hcam.u.error64.u.type_24_error;
2278 
2279         ipr_err_separator;
2280 
2281         ipr_err("RAID %s Array Configuration: %s\n",
2282                 error->protection_level,
2283                 ipr_format_res_path(ioa_cfg, error->last_res_path,
2284                         buffer, sizeof(buffer)));
2285 
2286         ipr_err_separator;
2287 
2288         array_entry = error->array_member;
2289         num_entries = min_t(u32, error->num_entries,
2290                             ARRAY_SIZE(error->array_member));
2291 
2292         for (i = 0; i < num_entries; i++, array_entry++) {
2293 
2294                 if (!memcmp(array_entry->vpd.vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
2295                         continue;
2296 
2297                 if (error->exposed_mode_adn == i)
2298                         ipr_err("Exposed Array Member %d:\n", i);
2299                 else
2300                         ipr_err("Array Member %d:\n", i);
2301 
2302                 ipr_err("Array Member %d:\n", i);
2303                 ipr_log_ext_vpd(&array_entry->vpd);
2304                 ipr_err("Current Location: %s\n",
2305                          ipr_format_res_path(ioa_cfg, array_entry->res_path,
2306                                 buffer, sizeof(buffer)));
2307                 ipr_err("Expected Location: %s\n",
2308                          ipr_format_res_path(ioa_cfg,
2309                                 array_entry->expected_res_path,
2310                                 buffer, sizeof(buffer)));
2311 
2312                 ipr_err_separator;
2313         }
2314 }
2315 
2316 /**
2317  * ipr_log_sis64_fabric_error - Log a sis64 fabric error.
2318  * @ioa_cfg:    ioa config struct
2319  * @hostrcb:    hostrcb struct
2320  *
2321  * Return value:
2322  *      none
2323  **/
2324 static void ipr_log_sis64_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
2325                                        struct ipr_hostrcb *hostrcb)
2326 {
2327         struct ipr_hostrcb_type_30_error *error;
2328         struct ipr_hostrcb64_fabric_desc *fabric;
2329         struct ipr_hostrcb64_config_element *cfg;
2330         int i, add_len;
2331 
2332         error = &hostrcb->hcam.u.error64.u.type_30_error;
2333 
2334         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
2335         ipr_hcam_err(hostrcb, "%s\n", error->failure_reason);
2336 
2337         add_len = be32_to_cpu(hostrcb->hcam.length) -
2338                 (offsetof(struct ipr_hostrcb64_error, u) +
2339                  offsetof(struct ipr_hostrcb_type_30_error, desc));
2340 
2341         for (i = 0, fabric = error->desc; i < error->num_entries; i++) {
2342                 ipr_log64_fabric_path(hostrcb, fabric);
2343                 for_each_fabric_cfg(fabric, cfg)
2344                         ipr_log64_path_elem(hostrcb, cfg);
2345 
2346                 add_len -= be16_to_cpu(fabric->length);
2347                 fabric = (struct ipr_hostrcb64_fabric_desc *)
2348                         ((unsigned long)fabric + be16_to_cpu(fabric->length));
2349         }
2350 
2351         ipr_log_hex_data(ioa_cfg, (u32 *)fabric, add_len);
2352 }
2353 
2354 /**
2355  * ipr_log_generic_error - Log an adapter error.
2356  * @ioa_cfg:    ioa config struct
2357  * @hostrcb:    hostrcb struct
2358  *
2359  * Return value:
2360  *      none
2361  **/
2362 static void ipr_log_generic_error(struct ipr_ioa_cfg *ioa_cfg,
2363                                   struct ipr_hostrcb *hostrcb)
2364 {
2365         ipr_log_hex_data(ioa_cfg, hostrcb->hcam.u.raw.data,
2366                          be32_to_cpu(hostrcb->hcam.length));
2367 }
2368 
2369 /**
2370  * ipr_get_error - Find the specfied IOASC in the ipr_error_table.
2371  * @ioasc:      IOASC
2372  *
2373  * This function will return the index of into the ipr_error_table
2374  * for the specified IOASC. If the IOASC is not in the table,
2375  * 0 will be returned, which points to the entry used for unknown errors.
2376  *
2377  * Return value:
2378  *      index into the ipr_error_table
2379  **/
2380 static u32 ipr_get_error(u32 ioasc)
2381 {
2382         int i;
2383 
2384         for (i = 0; i < ARRAY_SIZE(ipr_error_table); i++)
2385                 if (ipr_error_table[i].ioasc == (ioasc & IPR_IOASC_IOASC_MASK))
2386                         return i;
2387 
2388         return 0;
2389 }
2390 
2391 /**
2392  * ipr_handle_log_data - Log an adapter error.
2393  * @ioa_cfg:    ioa config struct
2394  * @hostrcb:    hostrcb struct
2395  *
2396  * This function logs an adapter error to the system.
2397  *
2398  * Return value:
2399  *      none
2400  **/
2401 static void ipr_handle_log_data(struct ipr_ioa_cfg *ioa_cfg,
2402                                 struct ipr_hostrcb *hostrcb)
2403 {
2404         u32 ioasc;
2405         int error_index;
2406 
2407         if (hostrcb->hcam.notify_type != IPR_HOST_RCB_NOTIF_TYPE_ERROR_LOG_ENTRY)
2408                 return;
2409 
2410         if (hostrcb->hcam.notifications_lost == IPR_HOST_RCB_NOTIFICATIONS_LOST)
2411                 dev_err(&ioa_cfg->pdev->dev, "Error notifications lost\n");
2412 
2413         if (ioa_cfg->sis64)
2414                 ioasc = be32_to_cpu(hostrcb->hcam.u.error64.fd_ioasc);
2415         else
2416                 ioasc = be32_to_cpu(hostrcb->hcam.u.error.fd_ioasc);
2417 
2418         if (!ioa_cfg->sis64 && (ioasc == IPR_IOASC_BUS_WAS_RESET ||
2419             ioasc == IPR_IOASC_BUS_WAS_RESET_BY_OTHER)) {
2420                 /* Tell the midlayer we had a bus reset so it will handle the UA properly */
2421                 scsi_report_bus_reset(ioa_cfg->host,
2422                                       hostrcb->hcam.u.error.fd_res_addr.bus);
2423         }
2424 
2425         error_index = ipr_get_error(ioasc);
2426 
2427         if (!ipr_error_table[error_index].log_hcam)
2428                 return;
2429 
2430         ipr_hcam_err(hostrcb, "%s\n", ipr_error_table[error_index].error);
2431 
2432         /* Set indication we have logged an error */
2433         ioa_cfg->errors_logged++;
2434 
2435         if (ioa_cfg->log_level < ipr_error_table[error_index].log_hcam)
2436                 return;
2437         if (be32_to_cpu(hostrcb->hcam.length) > sizeof(hostrcb->hcam.u.raw))
2438                 hostrcb->hcam.length = cpu_to_be32(sizeof(hostrcb->hcam.u.raw));
2439 
2440         switch (hostrcb->hcam.overlay_id) {
2441         case IPR_HOST_RCB_OVERLAY_ID_2:
2442                 ipr_log_cache_error(ioa_cfg, hostrcb);
2443                 break;
2444         case IPR_HOST_RCB_OVERLAY_ID_3:
2445                 ipr_log_config_error(ioa_cfg, hostrcb);
2446                 break;
2447         case IPR_HOST_RCB_OVERLAY_ID_4:
2448         case IPR_HOST_RCB_OVERLAY_ID_6:
2449                 ipr_log_array_error(ioa_cfg, hostrcb);
2450                 break;
2451         case IPR_HOST_RCB_OVERLAY_ID_7:
2452                 ipr_log_dual_ioa_error(ioa_cfg, hostrcb);
2453                 break;
2454         case IPR_HOST_RCB_OVERLAY_ID_12:
2455                 ipr_log_enhanced_cache_error(ioa_cfg, hostrcb);
2456                 break;
2457         case IPR_HOST_RCB_OVERLAY_ID_13:
2458                 ipr_log_enhanced_config_error(ioa_cfg, hostrcb);
2459                 break;
2460         case IPR_HOST_RCB_OVERLAY_ID_14:
2461         case IPR_HOST_RCB_OVERLAY_ID_16:
2462                 ipr_log_enhanced_array_error(ioa_cfg, hostrcb);
2463                 break;
2464         case IPR_HOST_RCB_OVERLAY_ID_17:
2465                 ipr_log_enhanced_dual_ioa_error(ioa_cfg, hostrcb);
2466                 break;
2467         case IPR_HOST_RCB_OVERLAY_ID_20:
2468                 ipr_log_fabric_error(ioa_cfg, hostrcb);
2469                 break;
2470         case IPR_HOST_RCB_OVERLAY_ID_23:
2471                 ipr_log_sis64_config_error(ioa_cfg, hostrcb);
2472                 break;
2473         case IPR_HOST_RCB_OVERLAY_ID_24:
2474         case IPR_HOST_RCB_OVERLAY_ID_26:
2475                 ipr_log_sis64_array_error(ioa_cfg, hostrcb);
2476                 break;
2477         case IPR_HOST_RCB_OVERLAY_ID_30:
2478                 ipr_log_sis64_fabric_error(ioa_cfg, hostrcb);
2479                 break;
2480         case IPR_HOST_RCB_OVERLAY_ID_1:
2481         case IPR_HOST_RCB_OVERLAY_ID_DEFAULT:
2482         default:
2483                 ipr_log_generic_error(ioa_cfg, hostrcb);
2484                 break;
2485         }
2486 }
2487 
2488 /**
2489  * ipr_process_error - Op done function for an adapter error log.
2490  * @ipr_cmd:    ipr command struct
2491  *
2492  * This function is the op done function for an error log host
2493  * controlled async from the adapter. It will log the error and
2494  * send the HCAM back to the adapter.
2495  *
2496  * Return value:
2497  *      none
2498  **/
2499 static void ipr_process_error(struct ipr_cmnd *ipr_cmd)
2500 {
2501         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2502         struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
2503         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
2504         u32 fd_ioasc;
2505 
2506         if (ioa_cfg->sis64)
2507                 fd_ioasc = be32_to_cpu(hostrcb->hcam.u.error64.fd_ioasc);
2508         else
2509                 fd_ioasc = be32_to_cpu(hostrcb->hcam.u.error.fd_ioasc);
2510 
2511         list_del(&hostrcb->queue);
2512         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
2513 
2514         if (!ioasc) {
2515                 ipr_handle_log_data(ioa_cfg, hostrcb);
2516                 if (fd_ioasc == IPR_IOASC_NR_IOA_RESET_REQUIRED)
2517                         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_ABBREV);
2518         } else if (ioasc != IPR_IOASC_IOA_WAS_RESET) {
2519                 dev_err(&ioa_cfg->pdev->dev,
2520                         "Host RCB failed with IOASC: 0x%08X\n", ioasc);
2521         }
2522 
2523         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
2524 }
2525 
2526 /**
2527  * ipr_timeout -  An internally generated op has timed out.
2528  * @ipr_cmd:    ipr command struct
2529  *
2530  * This function blocks host requests and initiates an
2531  * adapter reset.
2532  *
2533  * Return value:
2534  *      none
2535  **/
2536 static void ipr_timeout(struct ipr_cmnd *ipr_cmd)
2537 {
2538         unsigned long lock_flags = 0;
2539         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2540 
2541         ENTER;
2542         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2543 
2544         ioa_cfg->errors_logged++;
2545         dev_err(&ioa_cfg->pdev->dev,
2546                 "Adapter being reset due to command timeout.\n");
2547 
2548         if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
2549                 ioa_cfg->sdt_state = GET_DUMP;
2550 
2551         if (!ioa_cfg->in_reset_reload || ioa_cfg->reset_cmd == ipr_cmd)
2552                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
2553 
2554         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2555         LEAVE;
2556 }
2557 
2558 /**
2559  * ipr_oper_timeout -  Adapter timed out transitioning to operational
2560  * @ipr_cmd:    ipr command struct
2561  *
2562  * This function blocks host requests and initiates an
2563  * adapter reset.
2564  *
2565  * Return value:
2566  *      none
2567  **/
2568 static void ipr_oper_timeout(struct ipr_cmnd *ipr_cmd)
2569 {
2570         unsigned long lock_flags = 0;
2571         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2572 
2573         ENTER;
2574         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2575 
2576         ioa_cfg->errors_logged++;
2577         dev_err(&ioa_cfg->pdev->dev,
2578                 "Adapter timed out transitioning to operational.\n");
2579 
2580         if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
2581                 ioa_cfg->sdt_state = GET_DUMP;
2582 
2583         if (!ioa_cfg->in_reset_reload || ioa_cfg->reset_cmd == ipr_cmd) {
2584                 if (ipr_fastfail)
2585                         ioa_cfg->reset_retries += IPR_NUM_RESET_RELOAD_RETRIES;
2586                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
2587         }
2588 
2589         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2590         LEAVE;
2591 }
2592 
2593 /**
2594  * ipr_find_ses_entry - Find matching SES in SES table
2595  * @res:        resource entry struct of SES
2596  *
2597  * Return value:
2598  *      pointer to SES table entry / NULL on failure
2599  **/
2600 static const struct ipr_ses_table_entry *
2601 ipr_find_ses_entry(struct ipr_resource_entry *res)
2602 {
2603         int i, j, matches;
2604         struct ipr_std_inq_vpids *vpids;
2605         const struct ipr_ses_table_entry *ste = ipr_ses_table;
2606 
2607         for (i = 0; i < ARRAY_SIZE(ipr_ses_table); i++, ste++) {
2608                 for (j = 0, matches = 0; j < IPR_PROD_ID_LEN; j++) {
2609                         if (ste->compare_product_id_byte[j] == 'X') {
2610                                 vpids = &res->std_inq_data.vpids;
2611                                 if (vpids->product_id[j] == ste->product_id[j])
2612                                         matches++;
2613                                 else
2614                                         break;
2615                         } else
2616                                 matches++;
2617                 }
2618 
2619                 if (matches == IPR_PROD_ID_LEN)
2620                         return ste;
2621         }
2622 
2623         return NULL;
2624 }
2625 
2626 /**
2627  * ipr_get_max_scsi_speed - Determine max SCSI speed for a given bus
2628  * @ioa_cfg:    ioa config struct
2629  * @bus:                SCSI bus
2630  * @bus_width:  bus width
2631  *
2632  * Return value:
2633  *      SCSI bus speed in units of 100KHz, 1600 is 160 MHz
2634  *      For a 2-byte wide SCSI bus, the maximum transfer speed is
2635  *      twice the maximum transfer rate (e.g. for a wide enabled bus,
2636  *      max 160MHz = max 320MB/sec).
2637  **/
2638 static u32 ipr_get_max_scsi_speed(struct ipr_ioa_cfg *ioa_cfg, u8 bus, u8 bus_width)
2639 {
2640         struct ipr_resource_entry *res;
2641         const struct ipr_ses_table_entry *ste;
2642         u32 max_xfer_rate = IPR_MAX_SCSI_RATE(bus_width);
2643 
2644         /* Loop through each config table entry in the config table buffer */
2645         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
2646                 if (!(IPR_IS_SES_DEVICE(res->std_inq_data)))
2647                         continue;
2648 
2649                 if (bus != res->bus)
2650                         continue;
2651 
2652                 if (!(ste = ipr_find_ses_entry(res)))
2653                         continue;
2654 
2655                 max_xfer_rate = (ste->max_bus_speed_limit * 10) / (bus_width / 8);
2656         }
2657 
2658         return max_xfer_rate;
2659 }
2660 
2661 /**
2662  * ipr_wait_iodbg_ack - Wait for an IODEBUG ACK from the IOA
2663  * @ioa_cfg:            ioa config struct
2664  * @max_delay:          max delay in micro-seconds to wait
2665  *
2666  * Waits for an IODEBUG ACK from the IOA, doing busy looping.
2667  *
2668  * Return value:
2669  *      0 on success / other on failure
2670  **/
2671 static int ipr_wait_iodbg_ack(struct ipr_ioa_cfg *ioa_cfg, int max_delay)
2672 {
2673         volatile u32 pcii_reg;
2674         int delay = 1;
2675 
2676         /* Read interrupt reg until IOA signals IO Debug Acknowledge */
2677         while (delay < max_delay) {
2678                 pcii_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
2679 
2680                 if (pcii_reg & IPR_PCII_IO_DEBUG_ACKNOWLEDGE)
2681                         return 0;
2682 
2683                 /* udelay cannot be used if delay is more than a few milliseconds */
2684                 if ((delay / 1000) > MAX_UDELAY_MS)
2685                         mdelay(delay / 1000);
2686                 else
2687                         udelay(delay);
2688 
2689                 delay += delay;
2690         }
2691         return -EIO;
2692 }
2693 
2694 /**
2695  * ipr_get_sis64_dump_data_section - Dump IOA memory
2696  * @ioa_cfg:                    ioa config struct
2697  * @start_addr:                 adapter address to dump
2698  * @dest:                       destination kernel buffer
2699  * @length_in_words:            length to dump in 4 byte words
2700  *
2701  * Return value:
2702  *      0 on success
2703  **/
2704 static int ipr_get_sis64_dump_data_section(struct ipr_ioa_cfg *ioa_cfg,
2705                                            u32 start_addr,
2706                                            __be32 *dest, u32 length_in_words)
2707 {
2708         int i;
2709 
2710         for (i = 0; i < length_in_words; i++) {
2711                 writel(start_addr+(i*4), ioa_cfg->regs.dump_addr_reg);
2712                 *dest = cpu_to_be32(readl(ioa_cfg->regs.dump_data_reg));
2713                 dest++;
2714         }
2715 
2716         return 0;
2717 }
2718 
2719 /**
2720  * ipr_get_ldump_data_section - Dump IOA memory
2721  * @ioa_cfg:                    ioa config struct
2722  * @start_addr:                 adapter address to dump
2723  * @dest:                               destination kernel buffer
2724  * @length_in_words:    length to dump in 4 byte words
2725  *
2726  * Return value:
2727  *      0 on success / -EIO on failure
2728  **/
2729 static int ipr_get_ldump_data_section(struct ipr_ioa_cfg *ioa_cfg,
2730                                       u32 start_addr,
2731                                       __be32 *dest, u32 length_in_words)
2732 {
2733         volatile u32 temp_pcii_reg;
2734         int i, delay = 0;
2735 
2736         if (ioa_cfg->sis64)
2737                 return ipr_get_sis64_dump_data_section(ioa_cfg, start_addr,
2738                                                        dest, length_in_words);
2739 
2740         /* Write IOA interrupt reg starting LDUMP state  */
2741         writel((IPR_UPROCI_RESET_ALERT | IPR_UPROCI_IO_DEBUG_ALERT),
2742                ioa_cfg->regs.set_uproc_interrupt_reg32);
2743 
2744         /* Wait for IO debug acknowledge */
2745         if (ipr_wait_iodbg_ack(ioa_cfg,
2746                                IPR_LDUMP_MAX_LONG_ACK_DELAY_IN_USEC)) {
2747                 dev_err(&ioa_cfg->pdev->dev,
2748                         "IOA dump long data transfer timeout\n");
2749                 return -EIO;
2750         }
2751 
2752         /* Signal LDUMP interlocked - clear IO debug ack */
2753         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2754                ioa_cfg->regs.clr_interrupt_reg);
2755 
2756         /* Write Mailbox with starting address */
2757         writel(start_addr, ioa_cfg->ioa_mailbox);
2758 
2759         /* Signal address valid - clear IOA Reset alert */
2760         writel(IPR_UPROCI_RESET_ALERT,
2761                ioa_cfg->regs.clr_uproc_interrupt_reg32);
2762 
2763         for (i = 0; i < length_in_words; i++) {
2764                 /* Wait for IO debug acknowledge */
2765                 if (ipr_wait_iodbg_ack(ioa_cfg,
2766                                        IPR_LDUMP_MAX_SHORT_ACK_DELAY_IN_USEC)) {
2767                         dev_err(&ioa_cfg->pdev->dev,
2768                                 "IOA dump short data transfer timeout\n");
2769                         return -EIO;
2770                 }
2771 
2772                 /* Read data from mailbox and increment destination pointer */
2773                 *dest = cpu_to_be32(readl(ioa_cfg->ioa_mailbox));
2774                 dest++;
2775 
2776                 /* For all but the last word of data, signal data received */
2777                 if (i < (length_in_words - 1)) {
2778                         /* Signal dump data received - Clear IO debug Ack */
2779                         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2780                                ioa_cfg->regs.clr_interrupt_reg);
2781                 }
2782         }
2783 
2784         /* Signal end of block transfer. Set reset alert then clear IO debug ack */
2785         writel(IPR_UPROCI_RESET_ALERT,
2786                ioa_cfg->regs.set_uproc_interrupt_reg32);
2787 
2788         writel(IPR_UPROCI_IO_DEBUG_ALERT,
2789                ioa_cfg->regs.clr_uproc_interrupt_reg32);
2790 
2791         /* Signal dump data received - Clear IO debug Ack */
2792         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2793                ioa_cfg->regs.clr_interrupt_reg);
2794 
2795         /* Wait for IOA to signal LDUMP exit - IOA reset alert will be cleared */
2796         while (delay < IPR_LDUMP_MAX_SHORT_ACK_DELAY_IN_USEC) {
2797                 temp_pcii_reg =
2798                     readl(ioa_cfg->regs.sense_uproc_interrupt_reg32);
2799 
2800                 if (!(temp_pcii_reg & IPR_UPROCI_RESET_ALERT))
2801                         return 0;
2802 
2803                 udelay(10);
2804                 delay += 10;
2805         }
2806 
2807         return 0;
2808 }
2809 
2810 #ifdef CONFIG_SCSI_IPR_DUMP
2811 /**
2812  * ipr_sdt_copy - Copy Smart Dump Table to kernel buffer
2813  * @ioa_cfg:            ioa config struct
2814  * @pci_address:        adapter address
2815  * @length:                     length of data to copy
2816  *
2817  * Copy data from PCI adapter to kernel buffer.
2818  * Note: length MUST be a 4 byte multiple
2819  * Return value:
2820  *      0 on success / other on failure
2821  **/
2822 static int ipr_sdt_copy(struct ipr_ioa_cfg *ioa_cfg,
2823                         unsigned long pci_address, u32 length)
2824 {
2825         int bytes_copied = 0;
2826         int cur_len, rc, rem_len, rem_page_len, max_dump_size;
2827         __be32 *page;
2828         unsigned long lock_flags = 0;
2829         struct ipr_ioa_dump *ioa_dump = &ioa_cfg->dump->ioa_dump;
2830 
2831         if (ioa_cfg->sis64)
2832                 max_dump_size = IPR_FMT3_MAX_IOA_DUMP_SIZE;
2833         else
2834                 max_dump_size = IPR_FMT2_MAX_IOA_DUMP_SIZE;
2835 
2836         while (bytes_copied < length &&
2837                (ioa_dump->hdr.len + bytes_copied) < max_dump_size) {
2838                 if (ioa_dump->page_offset >= PAGE_SIZE ||
2839                     ioa_dump->page_offset == 0) {
2840                         page = (__be32 *)__get_free_page(GFP_ATOMIC);
2841 
2842                         if (!page) {
2843                                 ipr_trace;
2844                                 return bytes_copied;
2845                         }
2846 
2847                         ioa_dump->page_offset = 0;
2848                         ioa_dump->ioa_data[ioa_dump->next_page_index] = page;
2849                         ioa_dump->next_page_index++;
2850                 } else
2851                         page = ioa_dump->ioa_data[ioa_dump->next_page_index - 1];
2852 
2853                 rem_len = length - bytes_copied;
2854                 rem_page_len = PAGE_SIZE - ioa_dump->page_offset;
2855                 cur_len = min(rem_len, rem_page_len);
2856 
2857                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2858                 if (ioa_cfg->sdt_state == ABORT_DUMP) {
2859                         rc = -EIO;
2860                 } else {
2861                         rc = ipr_get_ldump_data_section(ioa_cfg,
2862                                                         pci_address + bytes_copied,
2863                                                         &page[ioa_dump->page_offset / 4],
2864                                                         (cur_len / sizeof(u32)));
2865                 }
2866                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2867 
2868                 if (!rc) {
2869                         ioa_dump->page_offset += cur_len;
2870                         bytes_copied += cur_len;
2871                 } else {
2872                         ipr_trace;
2873                         break;
2874                 }
2875                 schedule();
2876         }
2877 
2878         return bytes_copied;
2879 }
2880 
2881 /**
2882  * ipr_init_dump_entry_hdr - Initialize a dump entry header.
2883  * @hdr:        dump entry header struct
2884  *
2885  * Return value:
2886  *      nothing
2887  **/
2888 static void ipr_init_dump_entry_hdr(struct ipr_dump_entry_header *hdr)
2889 {
2890         hdr->eye_catcher = IPR_DUMP_EYE_CATCHER;
2891         hdr->num_elems = 1;
2892         hdr->offset = sizeof(*hdr);
2893         hdr->status = IPR_DUMP_STATUS_SUCCESS;
2894 }
2895 
2896 /**
2897  * ipr_dump_ioa_type_data - Fill in the adapter type in the dump.
2898  * @ioa_cfg:    ioa config struct
2899  * @driver_dump:        driver dump struct
2900  *
2901  * Return value:
2902  *      nothing
2903  **/
2904 static void ipr_dump_ioa_type_data(struct ipr_ioa_cfg *ioa_cfg,
2905                                    struct ipr_driver_dump *driver_dump)
2906 {
2907         struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
2908 
2909         ipr_init_dump_entry_hdr(&driver_dump->ioa_type_entry.hdr);
2910         driver_dump->ioa_type_entry.hdr.len =
2911                 sizeof(struct ipr_dump_ioa_type_entry) -
2912                 sizeof(struct ipr_dump_entry_header);
2913         driver_dump->ioa_type_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
2914         driver_dump->ioa_type_entry.hdr.id = IPR_DUMP_DRIVER_TYPE_ID;
2915         driver_dump->ioa_type_entry.type = ioa_cfg->type;
2916         driver_dump->ioa_type_entry.fw_version = (ucode_vpd->major_release << 24) |
2917                 (ucode_vpd->card_type << 16) | (ucode_vpd->minor_release[0] << 8) |
2918                 ucode_vpd->minor_release[1];
2919         driver_dump->hdr.num_entries++;
2920 }
2921 
2922 /**
2923  * ipr_dump_version_data - Fill in the driver version in the dump.
2924  * @ioa_cfg:    ioa config struct
2925  * @driver_dump:        driver dump struct
2926  *
2927  * Return value:
2928  *      nothing
2929  **/
2930 static void ipr_dump_version_data(struct ipr_ioa_cfg *ioa_cfg,
2931                                   struct ipr_driver_dump *driver_dump)
2932 {
2933         ipr_init_dump_entry_hdr(&driver_dump->version_entry.hdr);
2934         driver_dump->version_entry.hdr.len =
2935                 sizeof(struct ipr_dump_version_entry) -
2936                 sizeof(struct ipr_dump_entry_header);
2937         driver_dump->version_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_ASCII;
2938         driver_dump->version_entry.hdr.id = IPR_DUMP_DRIVER_VERSION_ID;
2939         strcpy(driver_dump->version_entry.version, IPR_DRIVER_VERSION);
2940         driver_dump->hdr.num_entries++;
2941 }
2942 
2943 /**
2944  * ipr_dump_trace_data - Fill in the IOA trace in the dump.
2945  * @ioa_cfg:    ioa config struct
2946  * @driver_dump:        driver dump struct
2947  *
2948  * Return value:
2949  *      nothing
2950  **/
2951 static void ipr_dump_trace_data(struct ipr_ioa_cfg *ioa_cfg,
2952                                    struct ipr_driver_dump *driver_dump)
2953 {
2954         ipr_init_dump_entry_hdr(&driver_dump->trace_entry.hdr);
2955         driver_dump->trace_entry.hdr.len =
2956                 sizeof(struct ipr_dump_trace_entry) -
2957                 sizeof(struct ipr_dump_entry_header);
2958         driver_dump->trace_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
2959         driver_dump->trace_entry.hdr.id = IPR_DUMP_TRACE_ID;
2960         memcpy(driver_dump->trace_entry.trace, ioa_cfg->trace, IPR_TRACE_SIZE);
2961         driver_dump->hdr.num_entries++;
2962 }
2963 
2964 /**
2965  * ipr_dump_location_data - Fill in the IOA location in the dump.
2966  * @ioa_cfg:    ioa config struct
2967  * @driver_dump:        driver dump struct
2968  *
2969  * Return value:
2970  *      nothing
2971  **/
2972 static void ipr_dump_location_data(struct ipr_ioa_cfg *ioa_cfg,
2973                                    struct ipr_driver_dump *driver_dump)
2974 {
2975         ipr_init_dump_entry_hdr(&driver_dump->location_entry.hdr);
2976         driver_dump->location_entry.hdr.len =
2977                 sizeof(struct ipr_dump_location_entry) -
2978                 sizeof(struct ipr_dump_entry_header);
2979         driver_dump->location_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_ASCII;
2980         driver_dump->location_entry.hdr.id = IPR_DUMP_LOCATION_ID;
2981         strcpy(driver_dump->location_entry.location, dev_name(&ioa_cfg->pdev->dev));
2982         driver_dump->hdr.num_entries++;
2983 }
2984 
2985 /**
2986  * ipr_get_ioa_dump - Perform a dump of the driver and adapter.
2987  * @ioa_cfg:    ioa config struct
2988  * @dump:               dump struct
2989  *
2990  * Return value:
2991  *      nothing
2992  **/
2993 static void ipr_get_ioa_dump(struct ipr_ioa_cfg *ioa_cfg, struct ipr_dump *dump)
2994 {
2995         unsigned long start_addr, sdt_word;
2996         unsigned long lock_flags = 0;
2997         struct ipr_driver_dump *driver_dump = &dump->driver_dump;
2998         struct ipr_ioa_dump *ioa_dump = &dump->ioa_dump;
2999         u32 num_entries, max_num_entries, start_off, end_off;
3000         u32 max_dump_size, bytes_to_copy, bytes_copied, rc;
3001         struct ipr_sdt *sdt;
3002         int valid = 1;
3003         int i;
3004 
3005         ENTER;
3006 
3007         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3008 
3009         if (ioa_cfg->sdt_state != READ_DUMP) {
3010                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3011                 return;
3012         }
3013 
3014         if (ioa_cfg->sis64) {
3015                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3016                 ssleep(IPR_DUMP_DELAY_SECONDS);
3017                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3018         }
3019 
3020         start_addr = readl(ioa_cfg->ioa_mailbox);
3021 
3022         if (!ioa_cfg->sis64 && !ipr_sdt_is_fmt2(start_addr)) {
3023                 dev_err(&ioa_cfg->pdev->dev,
3024                         "Invalid dump table format: %lx\n", start_addr);
3025                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3026                 return;
3027         }
3028 
3029         dev_err(&ioa_cfg->pdev->dev, "Dump of IOA initiated\n");
3030 
3031         driver_dump->hdr.eye_catcher = IPR_DUMP_EYE_CATCHER;
3032 
3033         /* Initialize the overall dump header */
3034         driver_dump->hdr.len = sizeof(struct ipr_driver_dump);
3035         driver_dump->hdr.num_entries = 1;
3036         driver_dump->hdr.first_entry_offset = sizeof(struct ipr_dump_header);
3037         driver_dump->hdr.status = IPR_DUMP_STATUS_SUCCESS;
3038         driver_dump->hdr.os = IPR_DUMP_OS_LINUX;
3039         driver_dump->hdr.driver_name = IPR_DUMP_DRIVER_NAME;
3040 
3041         ipr_dump_version_data(ioa_cfg, driver_dump);
3042         ipr_dump_location_data(ioa_cfg, driver_dump);
3043         ipr_dump_ioa_type_data(ioa_cfg, driver_dump);
3044         ipr_dump_trace_data(ioa_cfg, driver_dump);
3045 
3046         /* Update dump_header */
3047         driver_dump->hdr.len += sizeof(struct ipr_dump_entry_header);
3048 
3049         /* IOA Dump entry */
3050         ipr_init_dump_entry_hdr(&ioa_dump->hdr);
3051         ioa_dump->hdr.len = 0;
3052         ioa_dump->hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
3053         ioa_dump->hdr.id = IPR_DUMP_IOA_DUMP_ID;
3054 
3055         /* First entries in sdt are actually a list of dump addresses and
3056          lengths to gather the real dump data.  sdt represents the pointer
3057          to the ioa generated dump table.  Dump data will be extracted based
3058          on entries in this table */
3059         sdt = &ioa_dump->sdt;
3060 
3061         if (ioa_cfg->sis64) {
3062                 max_num_entries = IPR_FMT3_NUM_SDT_ENTRIES;
3063                 max_dump_size = IPR_FMT3_MAX_IOA_DUMP_SIZE;
3064         } else {
3065                 max_num_entries = IPR_FMT2_NUM_SDT_ENTRIES;
3066                 max_dump_size = IPR_FMT2_MAX_IOA_DUMP_SIZE;
3067         }
3068 
3069         bytes_to_copy = offsetof(struct ipr_sdt, entry) +
3070                         (max_num_entries * sizeof(struct ipr_sdt_entry));
3071         rc = ipr_get_ldump_data_section(ioa_cfg, start_addr, (__be32 *)sdt,
3072                                         bytes_to_copy / sizeof(__be32));
3073 
3074         /* Smart Dump table is ready to use and the first entry is valid */
3075         if (rc || ((be32_to_cpu(sdt->hdr.state) != IPR_FMT3_SDT_READY_TO_USE) &&
3076             (be32_to_cpu(sdt->hdr.state) != IPR_FMT2_SDT_READY_TO_USE))) {
3077                 dev_err(&ioa_cfg->pdev->dev,
3078                         "Dump of IOA failed. Dump table not valid: %d, %X.\n",
3079                         rc, be32_to_cpu(sdt->hdr.state));
3080                 driver_dump->hdr.status = IPR_DUMP_STATUS_FAILED;
3081                 ioa_cfg->sdt_state = DUMP_OBTAINED;
3082                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3083                 return;
3084         }
3085 
3086         num_entries = be32_to_cpu(sdt->hdr.num_entries_used);
3087 
3088         if (num_entries > max_num_entries)
3089                 num_entries = max_num_entries;
3090 
3091         /* Update dump length to the actual data to be copied */
3092         dump->driver_dump.hdr.len += sizeof(struct ipr_sdt_header);
3093         if (ioa_cfg->sis64)
3094                 dump->driver_dump.hdr.len += num_entries * sizeof(struct ipr_sdt_entry);
3095         else
3096                 dump->driver_dump.hdr.len += max_num_entries * sizeof(struct ipr_sdt_entry);
3097 
3098         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3099 
3100         for (i = 0; i < num_entries; i++) {
3101                 if (ioa_dump->hdr.len > max_dump_size) {
3102                         driver_dump->hdr.status = IPR_DUMP_STATUS_QUAL_SUCCESS;
3103                         break;
3104                 }
3105 
3106                 if (sdt->entry[i].flags & IPR_SDT_VALID_ENTRY) {
3107                         sdt_word = be32_to_cpu(sdt->entry[i].start_token);
3108                         if (ioa_cfg->sis64)
3109                                 bytes_to_copy = be32_to_cpu(sdt->entry[i].end_token);
3110                         else {
3111                                 start_off = sdt_word & IPR_FMT2_MBX_ADDR_MASK;
3112                                 end_off = be32_to_cpu(sdt->entry[i].end_token);
3113 
3114                                 if (ipr_sdt_is_fmt2(sdt_word) && sdt_word)
3115                                         bytes_to_copy = end_off - start_off;
3116                                 else
3117                                         valid = 0;
3118                         }
3119                         if (valid) {
3120                                 if (bytes_to_copy > max_dump_size) {
3121                                         sdt->entry[i].flags &= ~IPR_SDT_VALID_ENTRY;
3122                                         continue;
3123                                 }
3124 
3125                                 /* Copy data from adapter to driver buffers */
3126                                 bytes_copied = ipr_sdt_copy(ioa_cfg, sdt_word,
3127                                                             bytes_to_copy);
3128 
3129                                 ioa_dump->hdr.len += bytes_copied;
3130 
3131                                 if (bytes_copied != bytes_to_copy) {
3132                                         driver_dump->hdr.status = IPR_DUMP_STATUS_QUAL_SUCCESS;
3133                                         break;
3134                                 }
3135                         }
3136                 }
3137         }
3138 
3139         dev_err(&ioa_cfg->pdev->dev, "Dump of IOA completed.\n");
3140 
3141         /* Update dump_header */
3142         driver_dump->hdr.len += ioa_dump->hdr.len;
3143         wmb();
3144         ioa_cfg->sdt_state = DUMP_OBTAINED;
3145         LEAVE;
3146 }
3147 
3148 #else
3149 #define ipr_get_ioa_dump(ioa_cfg, dump) do { } while (0)
3150 #endif
3151 
3152 /**
3153  * ipr_release_dump - Free adapter dump memory
3154  * @kref:       kref struct
3155  *
3156  * Return value:
3157  *      nothing
3158  **/
3159 static void ipr_release_dump(struct kref *kref)
3160 {
3161         struct ipr_dump *dump = container_of(kref, struct ipr_dump, kref);
3162         struct ipr_ioa_cfg *ioa_cfg = dump->ioa_cfg;
3163         unsigned long lock_flags = 0;
3164         int i;
3165 
3166         ENTER;
3167         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3168         ioa_cfg->dump = NULL;
3169         ioa_cfg->sdt_state = INACTIVE;
3170         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3171 
3172         for (i = 0; i < dump->ioa_dump.next_page_index; i++)
3173                 free_page((unsigned long) dump->ioa_dump.ioa_data[i]);
3174 
3175         vfree(dump->ioa_dump.ioa_data);
3176         kfree(dump);
3177         LEAVE;
3178 }
3179 
3180 /**
3181  * ipr_worker_thread - Worker thread
3182  * @work:               ioa config struct
3183  *
3184  * Called at task level from a work thread. This function takes care
3185  * of adding and removing device from the mid-layer as configuration
3186  * changes are detected by the adapter.
3187  *
3188  * Return value:
3189  *      nothing
3190  **/
3191 static void ipr_worker_thread(struct work_struct *work)
3192 {
3193         unsigned long lock_flags;
3194         struct ipr_resource_entry *res;
3195         struct scsi_device *sdev;
3196         struct ipr_dump *dump;
3197         struct ipr_ioa_cfg *ioa_cfg =
3198                 container_of(work, struct ipr_ioa_cfg, work_q);
3199         u8 bus, target, lun;
3200         int did_work;
3201 
3202         ENTER;
3203         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3204 
3205         if (ioa_cfg->sdt_state == READ_DUMP) {
3206                 dump = ioa_cfg->dump;
3207                 if (!dump) {
3208                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3209                         return;
3210                 }
3211                 kref_get(&dump->kref);
3212                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3213                 ipr_get_ioa_dump(ioa_cfg, dump);
3214                 kref_put(&dump->kref, ipr_release_dump);
3215 
3216                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3217                 if (ioa_cfg->sdt_state == DUMP_OBTAINED && !ioa_cfg->dump_timeout)
3218                         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
3219                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3220                 return;
3221         }
3222 
3223 restart:
3224         do {
3225                 did_work = 0;
3226                 if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds ||
3227                     !ioa_cfg->allow_ml_add_del) {
3228                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3229                         return;
3230                 }
3231 
3232                 list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
3233                         if (res->del_from_ml && res->sdev) {
3234                                 did_work = 1;
3235                                 sdev = res->sdev;
3236                                 if (!scsi_device_get(sdev)) {
3237                                         if (!res->add_to_ml)
3238                                                 list_move_tail(&res->queue, &ioa_cfg->free_res_q);
3239                                         else
3240                                                 res->del_from_ml = 0;
3241                                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3242                                         scsi_remove_device(sdev);
3243                                         scsi_device_put(sdev);
3244                                         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3245                                 }
3246                                 break;
3247                         }
3248                 }
3249         } while (did_work);
3250 
3251         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
3252                 if (res->add_to_ml) {
3253                         bus = res->bus;
3254                         target = res->target;
3255                         lun = res->lun;
3256                         res->add_to_ml = 0;
3257                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3258                         scsi_add_device(ioa_cfg->host, bus, target, lun);
3259                         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3260                         goto restart;
3261                 }
3262         }
3263 
3264         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3265         kobject_uevent(&ioa_cfg->host->shost_dev.kobj, KOBJ_CHANGE);
3266         LEAVE;
3267 }
3268 
3269 #ifdef CONFIG_SCSI_IPR_TRACE
3270 /**
3271  * ipr_read_trace - Dump the adapter trace
3272  * @filp:               open sysfs file
3273  * @kobj:               kobject struct
3274  * @bin_attr:           bin_attribute struct
3275  * @buf:                buffer
3276  * @off:                offset
3277  * @count:              buffer size
3278  *
3279  * Return value:
3280  *      number of bytes printed to buffer
3281  **/
3282 static ssize_t ipr_read_trace(struct file *filp, struct kobject *kobj,
3283                               struct bin_attribute *bin_attr,
3284                               char *buf, loff_t off, size_t count)
3285 {
3286         struct device *dev = container_of(kobj, struct device, kobj);
3287         struct Scsi_Host *shost = class_to_shost(dev);
3288         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3289         unsigned long lock_flags = 0;
3290         ssize_t ret;
3291 
3292         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3293         ret = memory_read_from_buffer(buf, count, &off, ioa_cfg->trace,
3294                                 IPR_TRACE_SIZE);
3295         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3296 
3297         return ret;
3298 }
3299 
3300 static struct bin_attribute ipr_trace_attr = {
3301         .attr = {
3302                 .name = "trace",
3303                 .mode = S_IRUGO,
3304         },
3305         .size = 0,
3306         .read = ipr_read_trace,
3307 };
3308 #endif
3309 
3310 /**
3311  * ipr_show_fw_version - Show the firmware version
3312  * @dev:        class device struct
3313  * @buf:        buffer
3314  *
3315  * Return value:
3316  *      number of bytes printed to buffer
3317  **/
3318 static ssize_t ipr_show_fw_version(struct device *dev,
3319                                    struct device_attribute *attr, char *buf)
3320 {
3321         struct Scsi_Host *shost = class_to_shost(dev);
3322         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3323         struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
3324         unsigned long lock_flags = 0;
3325         int len;
3326 
3327         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3328         len = snprintf(buf, PAGE_SIZE, "%02X%02X%02X%02X\n",
3329                        ucode_vpd->major_release, ucode_vpd->card_type,
3330                        ucode_vpd->minor_release[0],
3331                        ucode_vpd->minor_release[1]);
3332         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3333         return len;
3334 }
3335 
3336 static struct device_attribute ipr_fw_version_attr = {
3337         .attr = {
3338                 .name =         "fw_version",
3339                 .mode =         S_IRUGO,
3340         },
3341         .show = ipr_show_fw_version,
3342 };
3343 
3344 /**
3345  * ipr_show_log_level - Show the adapter's error logging level
3346  * @dev:        class device struct
3347  * @buf:        buffer
3348  *
3349  * Return value:
3350  *      number of bytes printed to buffer
3351  **/
3352 static ssize_t ipr_show_log_level(struct device *dev,
3353                                    struct device_attribute *attr, char *buf)
3354 {
3355         struct Scsi_Host *shost = class_to_shost(dev);
3356         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3357         unsigned long lock_flags = 0;
3358         int len;
3359 
3360         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3361         len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->log_level);
3362         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3363         return len;
3364 }
3365 
3366 /**
3367  * ipr_store_log_level - Change the adapter's error logging level
3368  * @dev:        class device struct
3369  * @buf:        buffer
3370  *
3371  * Return value:
3372  *      number of bytes printed to buffer
3373  **/
3374 static ssize_t ipr_store_log_level(struct device *dev,
3375                                    struct device_attribute *attr,
3376                                    const char *buf, size_t count)
3377 {
3378         struct Scsi_Host *shost = class_to_shost(dev);
3379         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3380         unsigned long lock_flags = 0;
3381 
3382         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3383         ioa_cfg->log_level = simple_strtoul(buf, NULL, 10);
3384         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3385         return strlen(buf);
3386 }
3387 
3388 static struct device_attribute ipr_log_level_attr = {
3389         .attr = {
3390                 .name =         "log_level",
3391                 .mode =         S_IRUGO | S_IWUSR,
3392         },
3393         .show = ipr_show_log_level,
3394         .store = ipr_store_log_level
3395 };
3396 
3397 /**
3398  * ipr_store_diagnostics - IOA Diagnostics interface
3399  * @dev:        device struct
3400  * @buf:        buffer
3401  * @count:      buffer size
3402  *
3403  * This function will reset the adapter and wait a reasonable
3404  * amount of time for any errors that the adapter might log.
3405  *
3406  * Return value:
3407  *      count on success / other on failure
3408  **/
3409 static ssize_t ipr_store_diagnostics(struct device *dev,
3410                                      struct device_attribute *attr,
3411                                      const char *buf, size_t count)
3412 {
3413         struct Scsi_Host *shost = class_to_shost(dev);
3414         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3415         unsigned long lock_flags = 0;
3416         int rc = count;
3417 
3418         if (!capable(CAP_SYS_ADMIN))
3419                 return -EACCES;
3420 
3421         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3422         while (ioa_cfg->in_reset_reload) {
3423                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3424                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3425                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3426         }
3427 
3428         ioa_cfg->errors_logged = 0;
3429         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3430 
3431         if (ioa_cfg->in_reset_reload) {
3432                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3433                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3434 
3435                 /* Wait for a second for any errors to be logged */
3436                 msleep(1000);
3437         } else {
3438                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3439                 return -EIO;
3440         }
3441 
3442         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3443         if (ioa_cfg->in_reset_reload || ioa_cfg->errors_logged)
3444                 rc = -EIO;
3445         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3446 
3447         return rc;
3448 }
3449 
3450 static struct device_attribute ipr_diagnostics_attr = {
3451         .attr = {
3452                 .name =         "run_diagnostics",
3453                 .mode =         S_IWUSR,
3454         },
3455         .store = ipr_store_diagnostics
3456 };
3457 
3458 /**
3459  * ipr_show_adapter_state - Show the adapter's state
3460  * @class_dev:  device struct
3461  * @buf:        buffer
3462  *
3463  * Return value:
3464  *      number of bytes printed to buffer
3465  **/
3466 static ssize_t ipr_show_adapter_state(struct device *dev,
3467                                       struct device_attribute *attr, char *buf)
3468 {
3469         struct Scsi_Host *shost = class_to_shost(dev);
3470         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3471         unsigned long lock_flags = 0;
3472         int len;
3473 
3474         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3475         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
3476                 len = snprintf(buf, PAGE_SIZE, "offline\n");
3477         else
3478                 len = snprintf(buf, PAGE_SIZE, "online\n");
3479         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3480         return len;
3481 }
3482 
3483 /**
3484  * ipr_store_adapter_state - Change adapter state
3485  * @dev:        device struct
3486  * @buf:        buffer
3487  * @count:      buffer size
3488  *
3489  * This function will change the adapter's state.
3490  *
3491  * Return value:
3492  *      count on success / other on failure
3493  **/
3494 static ssize_t ipr_store_adapter_state(struct device *dev,
3495                                        struct device_attribute *attr,
3496                                        const char *buf, size_t count)
3497 {
3498         struct Scsi_Host *shost = class_to_shost(dev);
3499         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3500         unsigned long lock_flags;
3501         int result = count, i;
3502 
3503         if (!capable(CAP_SYS_ADMIN))
3504                 return -EACCES;
3505 
3506         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3507         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead &&
3508             !strncmp(buf, "online", 6)) {
3509                 for (i = 0; i < ioa_cfg->hrrq_num; i++) {
3510                         spin_lock(&ioa_cfg->hrrq[i]._lock);
3511                         ioa_cfg->hrrq[i].ioa_is_dead = 0;
3512                         spin_unlock(&ioa_cfg->hrrq[i]._lock);
3513                 }
3514                 wmb();
3515                 ioa_cfg->reset_retries = 0;
3516                 ioa_cfg->in_ioa_bringdown = 0;
3517                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
3518         }
3519         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3520         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3521 
3522         return result;
3523 }
3524 
3525 static struct device_attribute ipr_ioa_state_attr = {
3526         .attr = {
3527                 .name =         "online_state",
3528                 .mode =         S_IRUGO | S_IWUSR,
3529         },
3530         .show = ipr_show_adapter_state,
3531         .store = ipr_store_adapter_state
3532 };
3533 
3534 /**
3535  * ipr_store_reset_adapter - Reset the adapter
3536  * @dev:        device struct
3537  * @buf:        buffer
3538  * @count:      buffer size
3539  *
3540  * This function will reset the adapter.
3541  *
3542  * Return value:
3543  *      count on success / other on failure
3544  **/
3545 static ssize_t ipr_store_reset_adapter(struct device *dev,
3546                                        struct device_attribute *attr,
3547                                        const char *buf, size_t count)
3548 {
3549         struct Scsi_Host *shost = class_to_shost(dev);
3550         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3551         unsigned long lock_flags;
3552         int result = count;
3553 
3554         if (!capable(CAP_SYS_ADMIN))
3555                 return -EACCES;
3556 
3557         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3558         if (!ioa_cfg->in_reset_reload)
3559                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3560         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3561         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3562 
3563         return result;
3564 }
3565 
3566 static struct device_attribute ipr_ioa_reset_attr = {
3567         .attr = {
3568                 .name =         "reset_host",
3569                 .mode =         S_IWUSR,
3570         },
3571         .store = ipr_store_reset_adapter
3572 };
3573 
3574 static int ipr_iopoll(struct blk_iopoll *iop, int budget);
3575  /**
3576  * ipr_show_iopoll_weight - Show ipr polling mode
3577  * @dev:        class device struct
3578  * @buf:        buffer
3579  *
3580  * Return value:
3581  *      number of bytes printed to buffer
3582  **/
3583 static ssize_t ipr_show_iopoll_weight(struct device *dev,
3584                                    struct device_attribute *attr, char *buf)
3585 {
3586         struct Scsi_Host *shost = class_to_shost(dev);
3587         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3588         unsigned long lock_flags = 0;
3589         int len;
3590 
3591         spin_lock_irqsave(shost->host_lock, lock_flags);
3592         len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->iopoll_weight);
3593         spin_unlock_irqrestore(shost->host_lock, lock_flags);
3594 
3595         return len;
3596 }
3597 
3598 /**
3599  * ipr_store_iopoll_weight - Change the adapter's polling mode
3600  * @dev:        class device struct
3601  * @buf:        buffer
3602  *
3603  * Return value:
3604  *      number of bytes printed to buffer
3605  **/
3606 static ssize_t ipr_store_iopoll_weight(struct device *dev,
3607                                         struct device_attribute *attr,
3608                                         const char *buf, size_t count)
3609 {
3610         struct Scsi_Host *shost = class_to_shost(dev);
3611         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3612         unsigned long user_iopoll_weight;
3613         unsigned long lock_flags = 0;
3614         int i;
3615 
3616         if (!ioa_cfg->sis64) {
3617                 dev_info(&ioa_cfg->pdev->dev, "blk-iopoll not supported on this adapter\n");
3618                 return -EINVAL;
3619         }
3620         if (kstrtoul(buf, 10, &user_iopoll_weight))
3621                 return -EINVAL;
3622 
3623         if (user_iopoll_weight > 256) {
3624                 dev_info(&ioa_cfg->pdev->dev, "Invalid blk-iopoll weight. It must be less than 256\n");
3625                 return -EINVAL;
3626         }
3627 
3628         if (user_iopoll_weight == ioa_cfg->iopoll_weight) {
3629                 dev_info(&ioa_cfg->pdev->dev, "Current blk-iopoll weight has the same weight\n");
3630                 return strlen(buf);
3631         }
3632 
3633         if (blk_iopoll_enabled && ioa_cfg->iopoll_weight &&
3634                         ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
3635                 for (i = 1; i < ioa_cfg->hrrq_num; i++)
3636                         blk_iopoll_disable(&ioa_cfg->hrrq[i].iopoll);
3637         }
3638 
3639         spin_lock_irqsave(shost->host_lock, lock_flags);
3640         ioa_cfg->iopoll_weight = user_iopoll_weight;
3641         if (blk_iopoll_enabled && ioa_cfg->iopoll_weight &&
3642                         ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
3643                 for (i = 1; i < ioa_cfg->hrrq_num; i++) {
3644                         blk_iopoll_init(&ioa_cfg->hrrq[i].iopoll,
3645                                         ioa_cfg->iopoll_weight, ipr_iopoll);
3646                         blk_iopoll_enable(&ioa_cfg->hrrq[i].iopoll);
3647                 }
3648         }
3649         spin_unlock_irqrestore(shost->host_lock, lock_flags);
3650 
3651         return strlen(buf);
3652 }
3653 
3654 static struct device_attribute ipr_iopoll_weight_attr = {
3655         .attr = {
3656                 .name =         "iopoll_weight",
3657                 .mode =         S_IRUGO | S_IWUSR,
3658         },
3659         .show = ipr_show_iopoll_weight,
3660         .store = ipr_store_iopoll_weight
3661 };
3662 
3663 /**
3664  * ipr_alloc_ucode_buffer - Allocates a microcode download buffer
3665  * @buf_len:            buffer length
3666  *
3667  * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3668  * list to use for microcode download
3669  *
3670  * Return value:
3671  *      pointer to sglist / NULL on failure
3672  **/
3673 static struct ipr_sglist *ipr_alloc_ucode_buffer(int buf_len)
3674 {
3675         int sg_size, order, bsize_elem, num_elem, i, j;
3676         struct ipr_sglist *sglist;
3677         struct scatterlist *scatterlist;
3678         struct page *page;
3679 
3680         /* Get the minimum size per scatter/gather element */
3681         sg_size = buf_len / (IPR_MAX_SGLIST - 1);
3682 
3683         /* Get the actual size per element */
3684         order = get_order(sg_size);
3685 
3686         /* Determine the actual number of bytes per element */
3687         bsize_elem = PAGE_SIZE * (1 << order);
3688 
3689         /* Determine the actual number of sg entries needed */
3690         if (buf_len % bsize_elem)
3691                 num_elem = (buf_len / bsize_elem) + 1;
3692         else
3693                 num_elem = buf_len / bsize_elem;
3694 
3695         /* Allocate a scatter/gather list for the DMA */
3696         sglist = kzalloc(sizeof(struct ipr_sglist) +
3697                          (sizeof(struct scatterlist) * (num_elem - 1)),
3698                          GFP_KERNEL);
3699 
3700         if (sglist == NULL) {
3701                 ipr_trace;
3702                 return NULL;
3703         }
3704 
3705         scatterlist = sglist->scatterlist;
3706         sg_init_table(scatterlist, num_elem);
3707 
3708         sglist->order = order;
3709         sglist->num_sg = num_elem;
3710 
3711         /* Allocate a bunch of sg elements */
3712         for (i = 0; i < num_elem; i++) {
3713                 page = alloc_pages(GFP_KERNEL, order);
3714                 if (!page) {
3715                         ipr_trace;
3716 
3717                         /* Free up what we already allocated */
3718                         for (j = i - 1; j >= 0; j--)
3719                                 __free_pages(sg_page(&scatterlist[j]), order);
3720                         kfree(sglist);
3721                         return NULL;
3722                 }
3723 
3724                 sg_set_page(&scatterlist[i], page, 0, 0);
3725         }
3726 
3727         return sglist;
3728 }
3729 
3730 /**
3731  * ipr_free_ucode_buffer - Frees a microcode download buffer
3732  * @p_dnld:             scatter/gather list pointer
3733  *
3734  * Free a DMA'able ucode download buffer previously allocated with
3735  * ipr_alloc_ucode_buffer
3736  *
3737  * Return value:
3738  *      nothing
3739  **/
3740 static void ipr_free_ucode_buffer(struct ipr_sglist *sglist)
3741 {
3742         int i;
3743 
3744         for (i = 0; i < sglist->num_sg; i++)
3745                 __free_pages(sg_page(&sglist->scatterlist[i]), sglist->order);
3746 
3747         kfree(sglist);
3748 }
3749 
3750 /**
3751  * ipr_copy_ucode_buffer - Copy user buffer to kernel buffer
3752  * @sglist:             scatter/gather list pointer
3753  * @buffer:             buffer pointer
3754  * @len:                buffer length
3755  *
3756  * Copy a microcode image from a user buffer into a buffer allocated by
3757  * ipr_alloc_ucode_buffer
3758  *
3759  * Return value:
3760  *      0 on success / other on failure
3761  **/
3762 static int ipr_copy_ucode_buffer(struct ipr_sglist *sglist,
3763                                  u8 *buffer, u32 len)
3764 {
3765         int bsize_elem, i, result = 0;
3766         struct scatterlist *scatterlist;
3767         void *kaddr;
3768 
3769         /* Determine the actual number of bytes per element */
3770         bsize_elem = PAGE_SIZE * (1 << sglist->order);
3771 
3772         scatterlist = sglist->scatterlist;
3773 
3774         for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3775                 struct page *page = sg_page(&scatterlist[i]);
3776 
3777                 kaddr = kmap(page);
3778                 memcpy(kaddr, buffer, bsize_elem);
3779                 kunmap(page);
3780 
3781                 scatterlist[i].length = bsize_elem;
3782 
3783                 if (result != 0) {
3784                         ipr_trace;
3785                         return result;
3786                 }
3787         }
3788 
3789         if (len % bsize_elem) {
3790                 struct page *page = sg_page(&scatterlist[i]);
3791 
3792                 kaddr = kmap(page);
3793                 memcpy(kaddr, buffer, len % bsize_elem);
3794                 kunmap(page);
3795 
3796                 scatterlist[i].length = len % bsize_elem;
3797         }
3798 
3799         sglist->buffer_len = len;
3800         return result;
3801 }
3802 
3803 /**
3804  * ipr_build_ucode_ioadl64 - Build a microcode download IOADL
3805  * @ipr_cmd:            ipr command struct
3806  * @sglist:             scatter/gather list
3807  *
3808  * Builds a microcode download IOA data list (IOADL).
3809  *
3810  **/
3811 static void ipr_build_ucode_ioadl64(struct ipr_cmnd *ipr_cmd,
3812                                     struct ipr_sglist *sglist)
3813 {
3814         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
3815         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
3816         struct scatterlist *scatterlist = sglist->scatterlist;
3817         int i;
3818 
3819         ipr_cmd->dma_use_sg = sglist->num_dma_sg;
3820         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
3821         ioarcb->data_transfer_length = cpu_to_be32(sglist->buffer_len);
3822 
3823         ioarcb->ioadl_len =
3824                 cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
3825         for (i = 0; i < ipr_cmd->dma_use_sg; i++) {
3826                 ioadl64[i].flags = cpu_to_be32(IPR_IOADL_FLAGS_WRITE);
3827                 ioadl64[i].data_len = cpu_to_be32(sg_dma_len(&scatterlist[i]));
3828                 ioadl64[i].address = cpu_to_be64(sg_dma_address(&scatterlist[i]));
3829         }
3830 
3831         ioadl64[i-1].flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
3832 }
3833 
3834 /**
3835  * ipr_build_ucode_ioadl - Build a microcode download IOADL
3836  * @ipr_cmd:    ipr command struct
3837  * @sglist:             scatter/gather list
3838  *
3839  * Builds a microcode download IOA data list (IOADL).
3840  *
3841  **/
3842 static void ipr_build_ucode_ioadl(struct ipr_cmnd *ipr_cmd,
3843                                   struct ipr_sglist *sglist)
3844 {
3845         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
3846         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
3847         struct scatterlist *scatterlist = sglist->scatterlist;
3848         int i;
3849 
3850         ipr_cmd->dma_use_sg = sglist->num_dma_sg;
3851         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
3852         ioarcb->data_transfer_length = cpu_to_be32(sglist->buffer_len);
3853 
3854         ioarcb->ioadl_len =
3855                 cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
3856 
3857         for (i = 0; i < ipr_cmd->dma_use_sg; i++) {
3858                 ioadl[i].flags_and_data_len =
3859                         cpu_to_be32(IPR_IOADL_FLAGS_WRITE | sg_dma_len(&scatterlist[i]));
3860                 ioadl[i].address =
3861                         cpu_to_be32(sg_dma_address(&scatterlist[i]));
3862         }
3863 
3864         ioadl[i-1].flags_and_data_len |=
3865                 cpu_to_be32(IPR_IOADL_FLAGS_LAST);
3866 }
3867 
3868 /**
3869  * ipr_update_ioa_ucode - Update IOA's microcode
3870  * @ioa_cfg:    ioa config struct
3871  * @sglist:             scatter/gather list
3872  *
3873  * Initiate an adapter reset to update the IOA's microcode
3874  *
3875  * Return value:
3876  *      0 on success / -EIO on failure
3877  **/
3878 static int ipr_update_ioa_ucode(struct ipr_ioa_cfg *ioa_cfg,
3879                                 struct ipr_sglist *sglist)
3880 {
3881         unsigned long lock_flags;
3882 
3883         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3884         while (ioa_cfg->in_reset_reload) {
3885                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3886                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3887                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3888         }
3889 
3890         if (ioa_cfg->ucode_sglist) {
3891                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3892                 dev_err(&ioa_cfg->pdev->dev,
3893                         "Microcode download already in progress\n");
3894                 return -EIO;
3895         }
3896 
3897         sglist->num_dma_sg = pci_map_sg(ioa_cfg->pdev, sglist->scatterlist,
3898                                         sglist->num_sg, DMA_TO_DEVICE);
3899 
3900         if (!sglist->num_dma_sg) {
3901                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3902                 dev_err(&ioa_cfg->pdev->dev,
3903                         "Failed to map microcode download buffer!\n");
3904                 return -EIO;
3905         }
3906 
3907         ioa_cfg->ucode_sglist = sglist;
3908         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3909         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3910         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3911 
3912         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3913         ioa_cfg->ucode_sglist = NULL;
3914         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3915         return 0;
3916 }
3917 
3918 /**
3919  * ipr_store_update_fw - Update the firmware on the adapter
3920  * @class_dev:  device struct
3921  * @buf:        buffer
3922  * @count:      buffer size
3923  *
3924  * This function will update the firmware on the adapter.
3925  *
3926  * Return value:
3927  *      count on success / other on failure
3928  **/
3929 static ssize_t ipr_store_update_fw(struct device *dev,
3930                                    struct device_attribute *attr,
3931                                    const char *buf, size_t count)
3932 {
3933         struct Scsi_Host *shost = class_to_shost(dev);
3934         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3935         struct ipr_ucode_image_header *image_hdr;
3936         const struct firmware *fw_entry;
3937         struct ipr_sglist *sglist;
3938         char fname[100];
3939         char *src;
3940         int len, result, dnld_size;
3941 
3942         if (!capable(CAP_SYS_ADMIN))
3943                 return -EACCES;
3944 
3945         len = snprintf(fname, 99, "%s", buf);
3946         fname[len-1] = '\0';
3947 
3948         if (request_firmware(&fw_entry, fname, &ioa_cfg->pdev->dev)) {
3949                 dev_err(&ioa_cfg->pdev->dev, "Firmware file %s not found\n", fname);
3950                 return -EIO;
3951         }
3952 
3953         image_hdr = (struct ipr_ucode_image_header *)fw_entry->data;
3954 
3955         src = (u8 *)image_hdr + be32_to_cpu(image_hdr->header_length);
3956         dnld_size = fw_entry->size - be32_to_cpu(image_hdr->header_length);
3957         sglist = ipr_alloc_ucode_buffer(dnld_size);
3958 
3959         if (!sglist) {
3960                 dev_err(&ioa_cfg->pdev->dev, "Microcode buffer allocation failed\n");
3961                 release_firmware(fw_entry);
3962                 return -ENOMEM;
3963         }
3964 
3965         result = ipr_copy_ucode_buffer(sglist, src, dnld_size);
3966 
3967         if (result) {
3968                 dev_err(&ioa_cfg->pdev->dev,
3969                         "Microcode buffer copy to DMA buffer failed\n");
3970                 goto out;
3971         }
3972 
3973         ipr_info("Updating microcode, please be patient.  This may take up to 30 minutes.\n");
3974 
3975         result = ipr_update_ioa_ucode(ioa_cfg, sglist);
3976 
3977         if (!result)
3978                 result = count;
3979 out:
3980         ipr_free_ucode_buffer(sglist);
3981         release_firmware(fw_entry);
3982         return result;
3983 }
3984 
3985 static struct device_attribute ipr_update_fw_attr = {
3986         .attr = {
3987                 .name =         "update_fw",
3988                 .mode =         S_IWUSR,
3989         },
3990         .store = ipr_store_update_fw
3991 };
3992 
3993 /**
3994  * ipr_show_fw_type - Show the adapter's firmware type.
3995  * @dev:        class device struct
3996  * @buf:        buffer
3997  *
3998  * Return value:
3999  *      number of bytes printed to buffer
4000  **/
4001 static ssize_t ipr_show_fw_type(struct device *dev,
4002                                 struct device_attribute *attr, char *buf)
4003 {
4004         struct Scsi_Host *shost = class_to_shost(dev);
4005         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4006         unsigned long lock_flags = 0;
4007         int len;
4008 
4009         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4010         len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->sis64);
4011         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4012         return len;
4013 }
4014 
4015 static struct device_attribute ipr_ioa_fw_type_attr = {
4016         .attr = {
4017                 .name =         "fw_type",
4018                 .mode =         S_IRUGO,
4019         },
4020         .show = ipr_show_fw_type
4021 };
4022 
4023 static struct device_attribute *ipr_ioa_attrs[] = {
4024         &ipr_fw_version_attr,
4025         &ipr_log_level_attr,
4026         &ipr_diagnostics_attr,
4027         &ipr_ioa_state_attr,
4028         &ipr_ioa_reset_attr,
4029         &ipr_update_fw_attr,
4030         &ipr_ioa_fw_type_attr,
4031         &ipr_iopoll_weight_attr,
4032         NULL,
4033 };
4034 
4035 #ifdef CONFIG_SCSI_IPR_DUMP
4036 /**
4037  * ipr_read_dump - Dump the adapter
4038  * @filp:               open sysfs file
4039  * @kobj:               kobject struct
4040  * @bin_attr:           bin_attribute struct
4041  * @buf:                buffer
4042  * @off:                offset
4043  * @count:              buffer size
4044  *
4045  * Return value:
4046  *      number of bytes printed to buffer
4047  **/
4048 static ssize_t ipr_read_dump(struct file *filp, struct kobject *kobj,
4049                              struct bin_attribute *bin_attr,
4050                              char *buf, loff_t off, size_t count)
4051 {
4052         struct device *cdev = container_of(kobj, struct device, kobj);
4053         struct Scsi_Host *shost = class_to_shost(cdev);
4054         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4055         struct ipr_dump *dump;
4056         unsigned long lock_flags = 0;
4057         char *src;
4058         int len, sdt_end;
4059         size_t rc = count;
4060 
4061         if (!capable(CAP_SYS_ADMIN))
4062                 return -EACCES;
4063 
4064         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4065         dump = ioa_cfg->dump;
4066 
4067         if (ioa_cfg->sdt_state != DUMP_OBTAINED || !dump) {
4068                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4069                 return 0;
4070         }
4071         kref_get(&dump->kref);
4072         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4073 
4074         if (off > dump->driver_dump.hdr.len) {
4075                 kref_put(&dump->kref, ipr_release_dump);
4076                 return 0;
4077         }
4078 
4079         if (off + count > dump->driver_dump.hdr.len) {
4080                 count = dump->driver_dump.hdr.len - off;
4081                 rc = count;
4082         }
4083 
4084         if (count && off < sizeof(dump->driver_dump)) {
4085                 if (off + count > sizeof(dump->driver_dump))
4086                         len = sizeof(dump->driver_dump) - off;
4087                 else
4088                         len = count;
4089                 src = (u8 *)&dump->driver_dump + off;
4090                 memcpy(buf, src, len);
4091                 buf += len;
4092                 off += len;
4093                 count -= len;
4094         }
4095 
4096         off -= sizeof(dump->driver_dump);
4097 
4098         if (ioa_cfg->sis64)
4099                 sdt_end = offsetof(struct ipr_ioa_dump, sdt.entry) +
4100                           (be32_to_cpu(dump->ioa_dump.sdt.hdr.num_entries_used) *
4101                            sizeof(struct ipr_sdt_entry));
4102         else
4103                 sdt_end = offsetof(struct ipr_ioa_dump, sdt.entry) +
4104                           (IPR_FMT2_NUM_SDT_ENTRIES * sizeof(struct ipr_sdt_entry));
4105 
4106         if (count && off < sdt_end) {
4107                 if (off + count > sdt_end)
4108                         len = sdt_end - off;
4109                 else
4110                         len = count;
4111                 src = (u8 *)&dump->ioa_dump + off;
4112                 memcpy(buf, src, len);
4113                 buf += len;
4114                 off += len;
4115                 count -= len;
4116         }
4117 
4118         off -= sdt_end;
4119 
4120         while (count) {
4121                 if ((off & PAGE_MASK) != ((off + count) & PAGE_MASK))
4122                         len = PAGE_ALIGN(off) - off;
4123                 else
4124                         len = count;
4125                 src = (u8 *)dump->ioa_dump.ioa_data[(off & PAGE_MASK) >> PAGE_SHIFT];
4126                 src += off & ~PAGE_MASK;
4127                 memcpy(buf, src, len);
4128                 buf += len;
4129                 off += len;
4130                 count -= len;
4131         }
4132 
4133         kref_put(&dump->kref, ipr_release_dump);
4134         return rc;
4135 }
4136 
4137 /**
4138  * ipr_alloc_dump - Prepare for adapter dump
4139  * @ioa_cfg:    ioa config struct
4140  *
4141  * Return value:
4142  *      0 on success / other on failure
4143  **/
4144 static int ipr_alloc_dump(struct ipr_ioa_cfg *ioa_cfg)
4145 {
4146         struct ipr_dump *dump;
4147         __be32 **ioa_data;
4148         unsigned long lock_flags = 0;
4149 
4150         dump = kzalloc(sizeof(struct ipr_dump), GFP_KERNEL);
4151 
4152         if (!dump) {
4153                 ipr_err("Dump memory allocation failed\n");
4154                 return -ENOMEM;
4155         }
4156 
4157         if (ioa_cfg->sis64)
4158                 ioa_data = vmalloc(IPR_FMT3_MAX_NUM_DUMP_PAGES * sizeof(__be32 *));
4159         else
4160                 ioa_data = vmalloc(IPR_FMT2_MAX_NUM_DUMP_PAGES * sizeof(__be32 *));
4161 
4162         if (!ioa_data) {
4163                 ipr_err("Dump memory allocation failed\n");
4164                 kfree(dump);
4165                 return -ENOMEM;
4166         }
4167 
4168         dump->ioa_dump.ioa_data = ioa_data;
4169 
4170         kref_init(&dump->kref);
4171         dump->ioa_cfg = ioa_cfg;
4172 
4173         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4174 
4175         if (INACTIVE != ioa_cfg->sdt_state) {
4176                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4177                 vfree(dump->ioa_dump.ioa_data);
4178                 kfree(dump);
4179                 return 0;
4180         }
4181 
4182         ioa_cfg->dump = dump;
4183         ioa_cfg->sdt_state = WAIT_FOR_DUMP;
4184         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead && !ioa_cfg->dump_taken) {
4185                 ioa_cfg->dump_taken = 1;
4186                 schedule_work(&ioa_cfg->work_q);
4187         }
4188         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4189 
4190         return 0;
4191 }
4192 
4193 /**
4194  * ipr_free_dump - Free adapter dump memory
4195  * @ioa_cfg:    ioa config struct
4196  *
4197  * Return value:
4198  *      0 on success / other on failure
4199  **/
4200 static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg)
4201 {
4202         struct ipr_dump *dump;
4203         unsigned long lock_flags = 0;
4204 
4205         ENTER;
4206 
4207         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4208         dump = ioa_cfg->dump;
4209         if (!dump) {
4210                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4211                 return 0;
4212         }
4213 
4214         ioa_cfg->dump = NULL;
4215         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4216 
4217         kref_put(&dump->kref, ipr_release_dump);
4218 
4219         LEAVE;
4220         return 0;
4221 }
4222 
4223 /**
4224  * ipr_write_dump - Setup dump state of adapter
4225  * @filp:               open sysfs file
4226  * @kobj:               kobject struct
4227  * @bin_attr:           bin_attribute struct
4228  * @buf:                buffer
4229  * @off:                offset
4230  * @count:              buffer size
4231  *
4232  * Return value:
4233  *      number of bytes printed to buffer
4234  **/
4235 static ssize_t ipr_write_dump(struct file *filp, struct kobject *kobj,
4236                               struct bin_attribute *bin_attr,
4237                               char *buf, loff_t off, size_t count)
4238 {
4239         struct device *cdev = container_of(kobj, struct device, kobj);
4240         struct Scsi_Host *shost = class_to_shost(cdev);
4241         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4242         int rc;
4243 
4244         if (!capable(CAP_SYS_ADMIN))
4245                 return -EACCES;
4246 
4247         if (buf[0] == '1')
4248                 rc = ipr_alloc_dump(ioa_cfg);
4249         else if (buf[0] == '')
4250                 rc = ipr_free_dump(ioa_cfg);
4251         else
4252                 return -EINVAL;
4253 
4254         if (rc)
4255                 return rc;
4256         else
4257                 return count;
4258 }
4259 
4260 static struct bin_attribute ipr_dump_attr = {
4261         .attr = {
4262                 .name = "dump",
4263                 .mode = S_IRUSR | S_IWUSR,
4264         },
4265         .size = 0,
4266         .read = ipr_read_dump,
4267         .write = ipr_write_dump
4268 };
4269 #else
4270 static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg) { return 0; };
4271 #endif
4272 
4273 /**
4274  * ipr_change_queue_depth - Change the device's queue depth
4275  * @sdev:       scsi device struct
4276  * @qdepth:     depth to set
4277  * @reason:     calling context
4278  *
4279  * Return value:
4280  *      actual depth set
4281  **/
4282 static int ipr_change_queue_depth(struct scsi_device *sdev, int qdepth,
4283                                   int reason)
4284 {
4285         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4286         struct ipr_resource_entry *res;
4287         unsigned long lock_flags = 0;
4288 
4289         if (reason != SCSI_QDEPTH_DEFAULT)
4290                 return -EOPNOTSUPP;
4291 
4292         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4293         res = (struct ipr_resource_entry *)sdev->hostdata;
4294 
4295         if (res && ipr_is_gata(res) && qdepth > IPR_MAX_CMD_PER_ATA_LUN)
4296                 qdepth = IPR_MAX_CMD_PER_ATA_LUN;
4297         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4298 
4299         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
4300         return sdev->queue_depth;
4301 }
4302 
4303 /**
4304  * ipr_change_queue_type - Change the device's queue type
4305  * @dsev:               scsi device struct
4306  * @tag_type:   type of tags to use
4307  *
4308  * Return value:
4309  *      actual queue type set
4310  **/
4311 static int ipr_change_queue_type(struct scsi_device *sdev, int tag_type)
4312 {
4313         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4314         struct ipr_resource_entry *res;
4315         unsigned long lock_flags = 0;
4316 
4317         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4318         res = (struct ipr_resource_entry *)sdev->hostdata;
4319 
4320         if (res) {
4321                 if (ipr_is_gscsi(res) && sdev->tagged_supported) {
4322                         /*
4323                          * We don't bother quiescing the device here since the
4324                          * adapter firmware does it for us.
4325                          */
4326                         scsi_set_tag_type(sdev, tag_type);
4327 
4328                         if (tag_type)
4329                                 scsi_activate_tcq(sdev, sdev->queue_depth);
4330                         else
4331                                 scsi_deactivate_tcq(sdev, sdev->queue_depth);
4332                 } else
4333                         tag_type = 0;
4334         } else
4335                 tag_type = 0;
4336 
4337         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4338         return tag_type;
4339 }
4340 
4341 /**
4342  * ipr_show_adapter_handle - Show the adapter's resource handle for this device
4343  * @dev:        device struct
4344  * @attr:       device attribute structure
4345  * @buf:        buffer
4346  *
4347  * Return value:
4348  *      number of bytes printed to buffer
4349  **/
4350 static ssize_t ipr_show_adapter_handle(struct device *dev, struct device_attribute *attr, char *buf)
4351 {
4352         struct scsi_device *sdev = to_scsi_device(dev);
4353         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4354         struct ipr_resource_entry *res;
4355         unsigned long lock_flags = 0;
4356         ssize_t len = -ENXIO;
4357 
4358         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4359         res = (struct ipr_resource_entry *)sdev->hostdata;
4360         if (res)
4361                 len = snprintf(buf, PAGE_SIZE, "%08X\n", res->res_handle);
4362         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4363         return len;
4364 }
4365 
4366 static struct device_attribute ipr_adapter_handle_attr = {
4367         .attr = {
4368                 .name =         "adapter_handle",
4369                 .mode =         S_IRUSR,
4370         },
4371         .show = ipr_show_adapter_handle
4372 };
4373 
4374 /**
4375  * ipr_show_resource_path - Show the resource path or the resource address for
4376  *                          this device.
4377  * @dev:        device struct
4378  * @attr:       device attribute structure
4379  * @buf:        buffer
4380  *
4381  * Return value:
4382  *      number of bytes printed to buffer
4383  **/
4384 static ssize_t ipr_show_resource_path(struct device *dev, struct device_attribute *attr, char *buf)
4385 {
4386         struct scsi_device *sdev = to_scsi_device(dev);
4387         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4388         struct ipr_resource_entry *res;
4389         unsigned long lock_flags = 0;
4390         ssize_t len = -ENXIO;
4391         char buffer[IPR_MAX_RES_PATH_LENGTH];
4392 
4393         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4394         res = (struct ipr_resource_entry *)sdev->hostdata;
4395         if (res && ioa_cfg->sis64)
4396                 len = snprintf(buf, PAGE_SIZE, "%s\n",
4397                                __ipr_format_res_path(res->res_path, buffer,
4398                                                      sizeof(buffer)));
4399         else if (res)
4400                 len = snprintf(buf, PAGE_SIZE, "%d:%d:%d:%d\n", ioa_cfg->host->host_no,
4401                                res->bus, res->target, res->lun);
4402 
4403         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4404         return len;
4405 }
4406 
4407 static struct device_attribute ipr_resource_path_attr = {
4408         .attr = {
4409                 .name =         "resource_path",
4410                 .mode =         S_IRUGO,
4411         },
4412         .show = ipr_show_resource_path
4413 };
4414 
4415 /**
4416  * ipr_show_device_id - Show the device_id for this device.
4417  * @dev:        device struct
4418  * @attr:       device attribute structure
4419  * @buf:        buffer
4420  *
4421  * Return value:
4422  *      number of bytes printed to buffer
4423  **/
4424 static ssize_t ipr_show_device_id(struct device *dev, struct device_attribute *attr, char *buf)
4425 {
4426         struct scsi_device *sdev = to_scsi_device(dev);
4427         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4428         struct ipr_resource_entry *res;
4429         unsigned long lock_flags = 0;
4430         ssize_t len = -ENXIO;
4431 
4432         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4433         res = (struct ipr_resource_entry *)sdev->hostdata;
4434         if (res && ioa_cfg->sis64)
4435                 len = snprintf(buf, PAGE_SIZE, "0x%llx\n", res->dev_id);
4436         else if (res)
4437                 len = snprintf(buf, PAGE_SIZE, "0x%llx\n", res->lun_wwn);
4438 
4439         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4440         return len;
4441 }
4442 
4443 static struct device_attribute ipr_device_id_attr = {
4444         .attr = {
4445                 .name =         "device_id",
4446                 .mode =         S_IRUGO,
4447         },
4448         .show = ipr_show_device_id
4449 };
4450 
4451 /**
4452  * ipr_show_resource_type - Show the resource type for this device.
4453  * @dev:        device struct
4454  * @attr:       device attribute structure
4455  * @buf:        buffer
4456  *
4457  * Return value:
4458  *      number of bytes printed to buffer
4459  **/
4460 static ssize_t ipr_show_resource_type(struct device *dev, struct device_attribute *attr, char *buf)
4461 {
4462         struct scsi_device *sdev = to_scsi_device(dev);
4463         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4464         struct ipr_resource_entry *res;
4465         unsigned long lock_flags = 0;
4466         ssize_t len = -ENXIO;
4467 
4468         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4469         res = (struct ipr_resource_entry *)sdev->hostdata;
4470 
4471         if (res)
4472                 len = snprintf(buf, PAGE_SIZE, "%x\n", res->type);
4473 
4474         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4475         return len;
4476 }
4477 
4478 static struct device_attribute ipr_resource_type_attr = {
4479         .attr = {
4480                 .name =         "resource_type",
4481                 .mode =         S_IRUGO,
4482         },
4483         .show = ipr_show_resource_type
4484 };
4485 
4486 static struct device_attribute *ipr_dev_attrs[] = {
4487         &ipr_adapter_handle_attr,
4488         &ipr_resource_path_attr,
4489         &ipr_device_id_attr,
4490         &ipr_resource_type_attr,
4491         NULL,
4492 };
4493 
4494 /**
4495  * ipr_biosparam - Return the HSC mapping
4496  * @sdev:                       scsi device struct
4497  * @block_device:       block device pointer
4498  * @capacity:           capacity of the device
4499  * @parm:                       Array containing returned HSC values.
4500  *
4501  * This function generates the HSC parms that fdisk uses.
4502  * We want to make sure we return something that places partitions
4503  * on 4k boundaries for best performance with the IOA.
4504  *
4505  * Return value:
4506  *      0 on success
4507  **/
4508 static int ipr_biosparam(struct scsi_device *sdev,
4509                          struct block_device *block_device,
4510                          sector_t capacity, int *parm)
4511 {
4512         int heads, sectors;
4513         sector_t cylinders;
4514 
4515         heads = 128;
4516         sectors = 32;
4517 
4518         cylinders = capacity;
4519         sector_div(cylinders, (128 * 32));
4520 
4521         /* return result */
4522         parm[0] = heads;
4523         parm[1] = sectors;
4524         parm[2] = cylinders;
4525 
4526         return 0;
4527 }
4528 
4529 /**
4530  * ipr_find_starget - Find target based on bus/target.
4531  * @starget:    scsi target struct
4532  *
4533  * Return value:
4534  *      resource entry pointer if found / NULL if not found
4535  **/
4536 static struct ipr_resource_entry *ipr_find_starget(struct scsi_target *starget)
4537 {
4538         struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4539         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4540         struct ipr_resource_entry *res;
4541 
4542         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
4543                 if ((res->bus == starget->channel) &&
4544                     (res->target == starget->id)) {
4545                         return res;
4546                 }
4547         }
4548 
4549         return NULL;
4550 }
4551 
4552 static struct ata_port_info sata_port_info;
4553 
4554 /**
4555  * ipr_target_alloc - Prepare for commands to a SCSI target
4556  * @starget:    scsi target struct
4557  *
4558  * If the device is a SATA device, this function allocates an
4559  * ATA port with libata, else it does nothing.
4560  *
4561  * Return value:
4562  *      0 on success / non-0 on failure
4563  **/
4564 static int ipr_target_alloc(struct scsi_target *starget)
4565 {
4566         struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4567         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4568         struct ipr_sata_port *sata_port;
4569         struct ata_port *ap;
4570         struct ipr_resource_entry *res;
4571         unsigned long lock_flags;
4572 
4573         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4574         res = ipr_find_starget(starget);
4575         starget->hostdata = NULL;
4576 
4577         if (res && ipr_is_gata(res)) {
4578                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4579                 sata_port = kzalloc(sizeof(*sata_port), GFP_KERNEL);
4580                 if (!sata_port)
4581                         return -ENOMEM;
4582 
4583                 ap = ata_sas_port_alloc(&ioa_cfg->ata_host, &sata_port_info, shost);
4584                 if (ap) {
4585                         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4586                         sata_port->ioa_cfg = ioa_cfg;
4587                         sata_port->ap = ap;
4588                         sata_port->res = res;
4589 
4590                         res->sata_port = sata_port;
4591                         ap->private_data = sata_port;
4592                         starget->hostdata = sata_port;
4593                 } else {
4594                         kfree(sata_port);
4595                         return -ENOMEM;
4596                 }
4597         }
4598         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4599 
4600         return 0;
4601 }
4602 
4603 /**
4604  * ipr_target_destroy - Destroy a SCSI target
4605  * @starget:    scsi target struct
4606  *
4607  * If the device was a SATA device, this function frees the libata
4608  * ATA port, else it does nothing.
4609  *
4610  **/
4611 static void ipr_target_destroy(struct scsi_target *starget)
4612 {
4613         struct ipr_sata_port *sata_port = starget->hostdata;
4614         struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4615         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4616 
4617         if (ioa_cfg->sis64) {
4618                 if (!ipr_find_starget(starget)) {
4619                         if (starget->channel == IPR_ARRAY_VIRTUAL_BUS)
4620                                 clear_bit(starget->id, ioa_cfg->array_ids);
4621                         else if (starget->channel == IPR_VSET_VIRTUAL_BUS)
4622                                 clear_bit(starget->id, ioa_cfg->vset_ids);
4623                         else if (starget->channel == 0)
4624                                 clear_bit(starget->id, ioa_cfg->target_ids);
4625                 }
4626         }
4627 
4628         if (sata_port) {
4629                 starget->hostdata = NULL;
4630                 ata_sas_port_destroy(sata_port->ap);
4631                 kfree(sata_port);
4632         }
4633 }
4634 
4635 /**
4636  * ipr_find_sdev - Find device based on bus/target/lun.
4637  * @sdev:       scsi device struct
4638  *
4639  * Return value:
4640  *      resource entry pointer if found / NULL if not found
4641  **/
4642 static struct ipr_resource_entry *ipr_find_sdev(struct scsi_device *sdev)
4643 {
4644         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4645         struct ipr_resource_entry *res;
4646 
4647         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
4648                 if ((res->bus == sdev->channel) &&
4649                     (res->target == sdev->id) &&
4650                     (res->lun == sdev->lun))
4651                         return res;
4652         }
4653 
4654         return NULL;
4655 }
4656 
4657 /**
4658  * ipr_slave_destroy - Unconfigure a SCSI device
4659  * @sdev:       scsi device struct
4660  *
4661  * Return value:
4662  *      nothing
4663  **/
4664 static void ipr_slave_destroy(struct scsi_device *sdev)
4665 {
4666         struct ipr_resource_entry *res;
4667         struct ipr_ioa_cfg *ioa_cfg;
4668         unsigned long lock_flags = 0;
4669 
4670         ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4671 
4672         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4673         res = (struct ipr_resource_entry *) sdev->hostdata;
4674         if (res) {
4675                 if (res->sata_port)
4676                         res->sata_port->ap->link.device[0].class = ATA_DEV_NONE;
4677                 sdev->hostdata = NULL;
4678                 res->sdev = NULL;
4679                 res->sata_port = NULL;
4680         }
4681         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4682 }
4683 
4684 /**
4685  * ipr_slave_configure - Configure a SCSI device
4686  * @sdev:       scsi device struct
4687  *
4688  * This function configures the specified scsi device.
4689  *
4690  * Return value:
4691  *      0 on success
4692  **/
4693 static int ipr_slave_configure(struct scsi_device *sdev)
4694 {
4695         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4696         struct ipr_resource_entry *res;
4697         struct ata_port *ap = NULL;
4698         unsigned long lock_flags = 0;
4699         char buffer[IPR_MAX_RES_PATH_LENGTH];
4700 
4701         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4702         res = sdev->hostdata;
4703         if (res) {
4704                 if (ipr_is_af_dasd_device(res))
4705                         sdev->type = TYPE_RAID;
4706                 if (ipr_is_af_dasd_device(res) || ipr_is_ioa_resource(res)) {
4707                         sdev->scsi_level = 4;
4708                         sdev->no_uld_attach = 1;
4709                 }
4710                 if (ipr_is_vset_device(res)) {
4711                         blk_queue_rq_timeout(sdev->request_queue,
4712                                              IPR_VSET_RW_TIMEOUT);
4713                         blk_queue_max_hw_sectors(sdev->request_queue, IPR_VSET_MAX_SECTORS);
4714                 }
4715                 if (ipr_is_gata(res) && res->sata_port)
4716                         ap = res->sata_port->ap;
4717                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4718 
4719                 if (ap) {
4720                         scsi_adjust_queue_depth(sdev, 0, IPR_MAX_CMD_PER_ATA_LUN);
4721                         ata_sas_slave_configure(sdev, ap);
4722                 } else
4723                         scsi_adjust_queue_depth(sdev, 0, sdev->host->cmd_per_lun);
4724                 if (ioa_cfg->sis64)
4725                         sdev_printk(KERN_INFO, sdev, "Resource path: %s\n",
4726                                     ipr_format_res_path(ioa_cfg,
4727                                 res->res_path, buffer, sizeof(buffer)));
4728                 return 0;
4729         }
4730         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4731         return 0;
4732 }
4733 
4734 /**
4735  * ipr_ata_slave_alloc - Prepare for commands to a SATA device
4736  * @sdev:       scsi device struct
4737  *
4738  * This function initializes an ATA port so that future commands
4739  * sent through queuecommand will work.
4740  *
4741  * Return value:
4742  *      0 on success
4743  **/
4744 static int ipr_ata_slave_alloc(struct scsi_device *sdev)
4745 {
4746         struct ipr_sata_port *sata_port = NULL;
4747         int rc = -ENXIO;
4748 
4749         ENTER;
4750         if (sdev->sdev_target)
4751                 sata_port = sdev->sdev_target->hostdata;
4752         if (sata_port) {
4753                 rc = ata_sas_port_init(sata_port->ap);
4754                 if (rc == 0)
4755                         rc = ata_sas_sync_probe(sata_port->ap);
4756         }
4757 
4758         if (rc)
4759                 ipr_slave_destroy(sdev);
4760 
4761         LEAVE;
4762         return rc;
4763 }
4764 
4765 /**
4766  * ipr_slave_alloc - Prepare for commands to a device.
4767  * @sdev:       scsi device struct
4768  *
4769  * This function saves a pointer to the resource entry
4770  * in the scsi device struct if the device exists. We
4771  * can then use this pointer in ipr_queuecommand when
4772  * handling new commands.
4773  *
4774  * Return value:
4775  *      0 on success / -ENXIO if device does not exist
4776  **/
4777 static int ipr_slave_alloc(struct scsi_device *sdev)
4778 {
4779         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4780         struct ipr_resource_entry *res;
4781         unsigned long lock_flags;
4782         int rc = -ENXIO;
4783 
4784         sdev->hostdata = NULL;
4785 
4786         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4787 
4788         res = ipr_find_sdev(sdev);
4789         if (res) {
4790                 res->sdev = sdev;
4791                 res->add_to_ml = 0;
4792                 res->in_erp = 0;
4793                 sdev->hostdata = res;
4794                 if (!ipr_is_naca_model(res))
4795                         res->needs_sync_complete = 1;
4796                 rc = 0;
4797                 if (ipr_is_gata(res)) {
4798                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4799                         return ipr_ata_slave_alloc(sdev);
4800                 }
4801         }
4802 
4803         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4804 
4805         return rc;
4806 }
4807 
4808 static int ipr_eh_host_reset(struct scsi_cmnd *cmd)
4809 {
4810         struct ipr_ioa_cfg *ioa_cfg;
4811         unsigned long lock_flags = 0;
4812         int rc = SUCCESS;
4813 
4814         ENTER;
4815         ioa_cfg = (struct ipr_ioa_cfg *) cmd->device->host->hostdata;
4816         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4817 
4818         if (!ioa_cfg->in_reset_reload && !ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
4819                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_ABBREV);
4820                 dev_err(&ioa_cfg->pdev->dev,
4821                         "Adapter being reset as a result of error recovery.\n");
4822 
4823                 if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
4824                         ioa_cfg->sdt_state = GET_DUMP;
4825         }
4826 
4827         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4828         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
4829         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4830 
4831         /* If we got hit with a host reset while we were already resetting
4832          the adapter for some reason, and the reset failed. */
4833         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
4834                 ipr_trace;
4835                 rc = FAILED;
4836         }
4837 
4838         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4839         LEAVE;
4840         return rc;
4841 }
4842 
4843 /**
4844  * ipr_device_reset - Reset the device
4845  * @ioa_cfg:    ioa config struct
4846  * @res:                resource entry struct
4847  *
4848  * This function issues a device reset to the affected device.
4849  * If the device is a SCSI device, a LUN reset will be sent
4850  * to the device first. If that does not work, a target reset
4851  * will be sent. If the device is a SATA device, a PHY reset will
4852  * be sent.
4853  *
4854  * Return value:
4855  *      0 on success / non-zero on failure
4856  **/
4857 static int ipr_device_reset(struct ipr_ioa_cfg *ioa_cfg,
4858                             struct ipr_resource_entry *res)
4859 {
4860         struct ipr_cmnd *ipr_cmd;
4861         struct ipr_ioarcb *ioarcb;
4862         struct ipr_cmd_pkt *cmd_pkt;
4863         struct ipr_ioarcb_ata_regs *regs;
4864         u32 ioasc;
4865 
4866         ENTER;
4867         ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
4868         ioarcb = &ipr_cmd->ioarcb;
4869         cmd_pkt = &ioarcb->cmd_pkt;
4870 
4871         if (ipr_cmd->ioa_cfg->sis64) {
4872                 regs = &ipr_cmd->i.ata_ioadl.regs;
4873                 ioarcb->add_cmd_parms_offset = cpu_to_be16(sizeof(*ioarcb));
4874         } else
4875                 regs = &ioarcb->u.add_data.u.regs;
4876 
4877         ioarcb->res_handle = res->res_handle;
4878         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
4879         cmd_pkt->cdb[0] = IPR_RESET_DEVICE;
4880         if (ipr_is_gata(res)) {
4881                 cmd_pkt->cdb[2] = IPR_ATA_PHY_RESET;
4882                 ioarcb->add_cmd_parms_len = cpu_to_be16(sizeof(regs->flags));
4883                 regs->flags |= IPR_ATA_FLAG_STATUS_ON_GOOD_COMPLETION;
4884         }
4885 
4886         ipr_send_blocking_cmd(ipr_cmd, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
4887         ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
4888         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
4889         if (ipr_is_gata(res) && res->sata_port && ioasc != IPR_IOASC_IOA_WAS_RESET) {
4890                 if (ipr_cmd->ioa_cfg->sis64)
4891                         memcpy(&res->sata_port->ioasa, &ipr_cmd->s.ioasa64.u.gata,
4892                                sizeof(struct ipr_ioasa_gata));
4893                 else
4894                         memcpy(&res->sata_port->ioasa, &ipr_cmd->s.ioasa.u.gata,
4895                                sizeof(struct ipr_ioasa_gata));
4896         }
4897 
4898         LEAVE;
4899         return IPR_IOASC_SENSE_KEY(ioasc) ? -EIO : 0;
4900 }
4901 
4902 /**
4903  * ipr_sata_reset - Reset the SATA port
4904  * @link:       SATA link to reset
4905  * @classes:    class of the attached device
4906  *
4907  * This function issues a SATA phy reset to the affected ATA link.
4908  *
4909  * Return value:
4910  *      0 on success / non-zero on failure
4911  **/
4912 static int ipr_sata_reset(struct ata_link *link, unsigned int *classes,
4913                                 unsigned long deadline)
4914 {
4915         struct ipr_sata_port *sata_port = link->ap->private_data;
4916         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
4917         struct ipr_resource_entry *res;
4918         unsigned long lock_flags = 0;
4919         int rc = -ENXIO;
4920 
4921         ENTER;
4922         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4923         while (ioa_cfg->in_reset_reload) {
4924                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4925                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
4926                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4927         }
4928 
4929         res = sata_port->res;
4930         if (res) {
4931                 rc = ipr_device_reset(ioa_cfg, res);
4932                 *classes = res->ata_class;
4933         }
4934 
4935         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4936         LEAVE;
4937         return rc;
4938 }
4939 
4940 /**
4941  * ipr_eh_dev_reset - Reset the device
4942  * @scsi_cmd:   scsi command struct
4943  *
4944  * This function issues a device reset to the affected device.
4945  * A LUN reset will be sent to the device first. If that does
4946  * not work, a target reset will be sent.
4947  *
4948  * Return value:
4949  *      SUCCESS / FAILED
4950  **/
4951 static int __ipr_eh_dev_reset(struct scsi_cmnd *scsi_cmd)
4952 {
4953         struct ipr_cmnd *ipr_cmd;
4954         struct ipr_ioa_cfg *ioa_cfg;
4955         struct ipr_resource_entry *res;
4956         struct ata_port *ap;
4957         int rc = 0;
4958         struct ipr_hrr_queue *hrrq;
4959 
4960         ENTER;
4961         ioa_cfg = (struct ipr_ioa_cfg *) scsi_cmd->device->host->hostdata;
4962         res = scsi_cmd->device->hostdata;
4963 
4964         if (!res)
4965                 return FAILED;
4966 
4967         /*
4968          * If we are currently going through reset/reload, return failed. This will force the
4969          * mid-layer to call ipr_eh_host_reset, which will then go to sleep and wait for the
4970          * reset to complete
4971          */
4972         if (ioa_cfg->in_reset_reload)
4973                 return FAILED;
4974         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
4975                 return FAILED;
4976 
4977         for_each_hrrq(hrrq, ioa_cfg) {
4978                 spin_lock(&hrrq->_lock);
4979                 list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
4980                         if (ipr_cmd->ioarcb.res_handle == res->res_handle) {
4981                                 if (ipr_cmd->scsi_cmd)
4982                                         ipr_cmd->done = ipr_scsi_eh_done;
4983                                 if (ipr_cmd->qc)
4984                                         ipr_cmd->done = ipr_sata_eh_done;
4985                                 if (ipr_cmd->qc &&
4986                                     !(ipr_cmd->qc->flags & ATA_QCFLAG_FAILED)) {
4987                                         ipr_cmd->qc->err_mask |= AC_ERR_TIMEOUT;
4988                                         ipr_cmd->qc->flags |= ATA_QCFLAG_FAILED;
4989                                 }
4990                         }
4991                 }
4992                 spin_unlock(&hrrq->_lock);
4993         }
4994         res->resetting_device = 1;
4995         scmd_printk(KERN_ERR, scsi_cmd, "Resetting device\n");
4996 
4997         if (ipr_is_gata(res) && res->sata_port) {
4998                 ap = res->sata_port->ap;
4999                 spin_unlock_irq(scsi_cmd->device->host->host_lock);
5000                 ata_std_error_handler(ap);
5001                 spin_lock_irq(scsi_cmd->device->host->host_lock);
5002 
5003                 for_each_hrrq(hrrq, ioa_cfg) {
5004                         spin_lock(&hrrq->_lock);
5005                         list_for_each_entry(ipr_cmd,
5006                                             &hrrq->hrrq_pending_q, queue) {
5007                                 if (ipr_cmd->ioarcb.res_handle ==
5008                                     res->res_handle) {
5009                                         rc = -EIO;
5010                                         break;
5011                                 }
5012                         }
5013                         spin_unlock(&hrrq->_lock);
5014                 }
5015         } else
5016                 rc = ipr_device_reset(ioa_cfg, res);
5017         res->resetting_device = 0;
5018 
5019         LEAVE;
5020         return rc ? FAILED : SUCCESS;
5021 }
5022 
5023 static int ipr_eh_dev_reset(struct scsi_cmnd *cmd)
5024 {
5025         int rc;
5026 
5027         spin_lock_irq(cmd->device->host->host_lock);
5028         rc = __ipr_eh_dev_reset(cmd);
5029         spin_unlock_irq(cmd->device->host->host_lock);
5030 
5031         return rc;
5032 }
5033 
5034 /**
5035  * ipr_bus_reset_done - Op done function for bus reset.
5036  * @ipr_cmd:    ipr command struct
5037  *
5038  * This function is the op done function for a bus reset
5039  *
5040  * Return value:
5041  *      none
5042  **/
5043 static void ipr_bus_reset_done(struct ipr_cmnd *ipr_cmd)
5044 {
5045         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
5046         struct ipr_resource_entry *res;
5047 
5048         ENTER;
5049         if (!ioa_cfg->sis64)
5050                 list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
5051                         if (res->res_handle == ipr_cmd->ioarcb.res_handle) {
5052                                 scsi_report_bus_reset(ioa_cfg->host, res->bus);
5053                                 break;
5054                         }
5055                 }
5056 
5057         /*
5058          * If abort has not completed, indicate the reset has, else call the
5059          * abort's done function to wake the sleeping eh thread
5060          */
5061         if (ipr_cmd->sibling->sibling)
5062                 ipr_cmd->sibling->sibling = NULL;
5063         else
5064                 ipr_cmd->sibling->done(ipr_cmd->sibling);
5065 
5066         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5067         LEAVE;
5068 }
5069 
5070 /**
5071  * ipr_abort_timeout - An abort task has timed out
5072  * @ipr_cmd:    ipr command struct
5073  *
5074  * This function handles when an abort task times out. If this
5075  * happens we issue a bus reset since we have resources tied
5076  * up that must be freed before returning to the midlayer.
5077  *
5078  * Return value:
5079  *      none
5080  **/
5081 static void ipr_abort_timeout(struct ipr_cmnd *ipr_cmd)
5082 {
5083         struct ipr_cmnd *reset_cmd;
5084         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
5085         struct ipr_cmd_pkt *cmd_pkt;
5086         unsigned long lock_flags = 0;
5087 
5088         ENTER;
5089         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5090         if (ipr_cmd->completion.done || ioa_cfg->in_reset_reload) {
5091                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5092                 return;
5093         }
5094 
5095         sdev_printk(KERN_ERR, ipr_cmd->u.sdev, "Abort timed out. Resetting bus.\n");
5096         reset_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
5097         ipr_cmd->sibling = reset_cmd;
5098         reset_cmd->sibling = ipr_cmd;
5099         reset_cmd->ioarcb.res_handle = ipr_cmd->ioarcb.res_handle;
5100         cmd_pkt = &reset_cmd->ioarcb.cmd_pkt;
5101         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5102         cmd_pkt->cdb[0] = IPR_RESET_DEVICE;
5103         cmd_pkt->cdb[2] = IPR_RESET_TYPE_SELECT | IPR_BUS_RESET;
5104 
5105         ipr_do_req(reset_cmd, ipr_bus_reset_done, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
5106         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5107         LEAVE;
5108 }
5109 
5110 /**
5111  * ipr_cancel_op - Cancel specified op
5112  * @scsi_cmd:   scsi command struct
5113  *
5114  * This function cancels specified op.
5115  *
5116  * Return value:
5117  *      SUCCESS / FAILED
5118  **/
5119 static int ipr_cancel_op(struct scsi_cmnd *scsi_cmd)
5120 {
5121         struct ipr_cmnd *ipr_cmd;
5122         struct ipr_ioa_cfg *ioa_cfg;
5123         struct ipr_resource_entry *res;
5124         struct ipr_cmd_pkt *cmd_pkt;
5125         u32 ioasc, int_reg;
5126         int op_found = 0;
5127         struct ipr_hrr_queue *hrrq;
5128 
5129         ENTER;
5130         ioa_cfg = (struct ipr_ioa_cfg *)scsi_cmd->device->host->hostdata;
5131         res = scsi_cmd->device->hostdata;
5132 
5133         /* If we are currently going through reset/reload, return failed.
5134          * This will force the mid-layer to call ipr_eh_host_reset,
5135          * which will then go to sleep and wait for the reset to complete
5136          */
5137         if (ioa_cfg->in_reset_reload ||
5138             ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
5139                 return FAILED;
5140         if (!res)
5141                 return FAILED;
5142 
5143         /*
5144          * If we are aborting a timed out op, chances are that the timeout was caused
5145          * by a still not detected EEH error. In such cases, reading a register will
5146          * trigger the EEH recovery infrastructure.
5147          */
5148         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
5149 
5150         if (!ipr_is_gscsi(res))
5151                 return FAILED;
5152 
5153         for_each_hrrq(hrrq, ioa_cfg) {
5154                 spin_lock(&hrrq->_lock);
5155                 list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
5156                         if (ipr_cmd->scsi_cmd == scsi_cmd) {
5157                                 ipr_cmd->done = ipr_scsi_eh_done;
5158                                 op_found = 1;
5159                                 break;
5160                         }
5161                 }
5162                 spin_unlock(&hrrq->_lock);
5163         }
5164 
5165         if (!op_found)
5166                 return SUCCESS;
5167 
5168         ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
5169         ipr_cmd->ioarcb.res_handle = res->res_handle;
5170         cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5171         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5172         cmd_pkt->cdb[0] = IPR_CANCEL_ALL_REQUESTS;
5173         ipr_cmd->u.sdev = scsi_cmd->device;
5174 
5175         scmd_printk(KERN_ERR, scsi_cmd, "Aborting command: %02X\n",
5176                     scsi_cmd->cmnd[0]);
5177         ipr_send_blocking_cmd(ipr_cmd, ipr_abort_timeout, IPR_CANCEL_ALL_TIMEOUT);
5178         ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5179 
5180         /*
5181          * If the abort task timed out and we sent a bus reset, we will get
5182          * one the following responses to the abort
5183          */
5184         if (ioasc == IPR_IOASC_BUS_WAS_RESET || ioasc == IPR_IOASC_SYNC_REQUIRED) {
5185                 ioasc = 0;
5186                 ipr_trace;
5187         }
5188 
5189         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5190         if (!ipr_is_naca_model(res))
5191                 res->needs_sync_complete = 1;
5192 
5193         LEAVE;
5194         return IPR_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
5195 }
5196 
5197 /**
5198  * ipr_eh_abort - Abort a single op
5199  * @scsi_cmd:   scsi command struct
5200  *
5201  * Return value:
5202  *      SUCCESS / FAILED
5203  **/
5204 static int ipr_eh_abort(struct scsi_cmnd *scsi_cmd)
5205 {
5206         unsigned long flags;
5207         int rc;
5208 
5209         ENTER;
5210 
5211         spin_lock_irqsave(scsi_cmd->device->host->host_lock, flags);
5212         rc = ipr_cancel_op(scsi_cmd);
5213         spin_unlock_irqrestore(scsi_cmd->device->host->host_lock, flags);
5214 
5215         LEAVE;
5216         return rc;
5217 }
5218 
5219 /**
5220  * ipr_handle_other_interrupt - Handle "other" interrupts
5221  * @ioa_cfg:    ioa config struct
5222  * @int_reg:    interrupt register
5223  *
5224  * Return value:
5225  *      IRQ_NONE / IRQ_HANDLED
5226  **/
5227 static irqreturn_t ipr_handle_other_interrupt(struct ipr_ioa_cfg *ioa_cfg,
5228                                               u32 int_reg)
5229 {
5230         irqreturn_t rc = IRQ_HANDLED;
5231         u32 int_mask_reg;
5232 
5233         int_mask_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg32);
5234         int_reg &= ~int_mask_reg;
5235 
5236         /* If an interrupt on the adapter did not occur, ignore it.
5237          * Or in the case of SIS 64, check for a stage change interrupt.
5238          */
5239         if ((int_reg & IPR_PCII_OPER_INTERRUPTS) == 0) {
5240                 if (ioa_cfg->sis64) {
5241                         int_mask_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
5242                         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg) & ~int_mask_reg;
5243                         if (int_reg & IPR_PCII_IPL_STAGE_CHANGE) {
5244 
5245                                 /* clear stage change */
5246                                 writel(IPR_PCII_IPL_STAGE_CHANGE, ioa_cfg->regs.clr_interrupt_reg);
5247                                 int_reg = readl(ioa_cfg->regs.sense_interrupt_reg) & ~int_mask_reg;
5248                                 list_del(&ioa_cfg->reset_cmd->queue);
5249                                 del_timer(&ioa_cfg->reset_cmd->timer);
5250                                 ipr_reset_ioa_job(ioa_cfg->reset_cmd);
5251                                 return IRQ_HANDLED;
5252                         }
5253                 }
5254 
5255                 return IRQ_NONE;
5256         }
5257 
5258         if (int_reg & IPR_PCII_IOA_TRANS_TO_OPER) {
5259                 /* Mask the interrupt */
5260                 writel(IPR_PCII_IOA_TRANS_TO_OPER, ioa_cfg->regs.set_interrupt_mask_reg);
5261 
5262                 /* Clear the interrupt */
5263                 writel(IPR_PCII_IOA_TRANS_TO_OPER, ioa_cfg->regs.clr_interrupt_reg);
5264                 int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
5265 
5266                 list_del(&ioa_cfg->reset_cmd->queue);
5267                 del_timer(&ioa_cfg->reset_cmd->timer);
5268                 ipr_reset_ioa_job(ioa_cfg->reset_cmd);
5269         } else if ((int_reg & IPR_PCII_HRRQ_UPDATED) == int_reg) {
5270                 if (ioa_cfg->clear_isr) {
5271                         if (ipr_debug && printk_ratelimit())
5272                                 dev_err(&ioa_cfg->pdev->dev,
5273                                         "Spurious interrupt detected. 0x%08X\n", int_reg);
5274                         writel(IPR_PCII_HRRQ_UPDATED, ioa_cfg->regs.clr_interrupt_reg32);
5275                         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5276                         return IRQ_NONE;
5277                 }
5278         } else {
5279                 if (int_reg & IPR_PCII_IOA_UNIT_CHECKED)
5280                         ioa_cfg->ioa_unit_checked = 1;
5281                 else if (int_reg & IPR_PCII_NO_HOST_RRQ)
5282                         dev_err(&ioa_cfg->pdev->dev,
5283                                 "No Host RRQ. 0x%08X\n", int_reg);
5284                 else
5285                         dev_err(&ioa_cfg->pdev->dev,
5286                                 "Permanent IOA failure. 0x%08X\n", int_reg);
5287 
5288                 if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
5289                         ioa_cfg->sdt_state = GET_DUMP;
5290 
5291                 ipr_mask_and_clear_interrupts(ioa_cfg, ~0);
5292                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
5293         }
5294 
5295         return rc;
5296 }
5297 
5298 /**
5299  * ipr_isr_eh - Interrupt service routine error handler
5300  * @ioa_cfg:    ioa config struct
5301  * @msg:        message to log
5302  *
5303  * Return value:
5304  *      none
5305  **/
5306 static void ipr_isr_eh(struct ipr_ioa_cfg *ioa_cfg, char *msg, u16 number)
5307 {
5308         ioa_cfg->errors_logged++;
5309         dev_err(&ioa_cfg->pdev->dev, "%s %d\n", msg, number);
5310 
5311         if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
5312                 ioa_cfg->sdt_state = GET_DUMP;
5313 
5314         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
5315 }
5316 
5317 static int ipr_process_hrrq(struct ipr_hrr_queue *hrr_queue, int budget,
5318                                                 struct list_head *doneq)
5319 {
5320         u32 ioasc;
5321         u16 cmd_index;
5322         struct ipr_cmnd *ipr_cmd;
5323         struct ipr_ioa_cfg *ioa_cfg = hrr_queue->ioa_cfg;
5324         int num_hrrq = 0;
5325 
5326         /* If interrupts are disabled, ignore the interrupt */
5327         if (!hrr_queue->allow_interrupts)
5328                 return 0;
5329 
5330         while ((be32_to_cpu(*hrr_queue->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5331                hrr_queue->toggle_bit) {
5332 
5333                 cmd_index = (be32_to_cpu(*hrr_queue->hrrq_curr) &
5334                              IPR_HRRQ_REQ_RESP_HANDLE_MASK) >>
5335                              IPR_HRRQ_REQ_RESP_HANDLE_SHIFT;
5336 
5337                 if (unlikely(cmd_index > hrr_queue->max_cmd_id ||
5338                              cmd_index < hrr_queue->min_cmd_id)) {
5339                         ipr_isr_eh(ioa_cfg,
5340                                 "Invalid response handle from IOA: ",
5341                                 cmd_index);
5342                         break;
5343                 }
5344 
5345                 ipr_cmd = ioa_cfg->ipr_cmnd_list[cmd_index];
5346                 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5347 
5348                 ipr_trc_hook(ipr_cmd, IPR_TRACE_FINISH, ioasc);
5349 
5350                 list_move_tail(&ipr_cmd->queue, doneq);
5351 
5352                 if (hrr_queue->hrrq_curr < hrr_queue->hrrq_end) {
5353                         hrr_queue->hrrq_curr++;
5354                 } else {
5355                         hrr_queue->hrrq_curr = hrr_queue->hrrq_start;
5356                         hrr_queue->toggle_bit ^= 1u;
5357                 }
5358                 num_hrrq++;
5359                 if (budget > 0 && num_hrrq >= budget)
5360                         break;
5361         }
5362 
5363         return num_hrrq;
5364 }
5365 
5366 static int ipr_iopoll(struct blk_iopoll *iop, int budget)
5367 {
5368         struct ipr_ioa_cfg *ioa_cfg;
5369         struct ipr_hrr_queue *hrrq;
5370         struct ipr_cmnd *ipr_cmd, *temp;
5371         unsigned long hrrq_flags;
5372         int completed_ops;
5373         LIST_HEAD(doneq);
5374 
5375         hrrq = container_of(iop, struct ipr_hrr_queue, iopoll);
5376         ioa_cfg = hrrq->ioa_cfg;
5377 
5378         spin_lock_irqsave(hrrq->lock, hrrq_flags);
5379         completed_ops = ipr_process_hrrq(hrrq, budget, &doneq);
5380 
5381         if (completed_ops < budget)
5382                 blk_iopoll_complete(iop);
5383         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5384 
5385         list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5386                 list_del(&ipr_cmd->queue);
5387                 del_timer(&ipr_cmd->timer);
5388                 ipr_cmd->fast_done(ipr_cmd);
5389         }
5390 
5391         return completed_ops;
5392 }
5393 
5394 /**
5395  * ipr_isr - Interrupt service routine
5396  * @irq:        irq number
5397  * @devp:       pointer to ioa config struct
5398  *
5399  * Return value:
5400  *      IRQ_NONE / IRQ_HANDLED
5401  **/
5402 static irqreturn_t ipr_isr(int irq, void *devp)
5403 {
5404         struct ipr_hrr_queue *hrrq = (struct ipr_hrr_queue *)devp;
5405         struct ipr_ioa_cfg *ioa_cfg = hrrq->ioa_cfg;
5406         unsigned long hrrq_flags = 0;
5407         u32 int_reg = 0;
5408         int num_hrrq = 0;
5409         int irq_none = 0;
5410         struct ipr_cmnd *ipr_cmd, *temp;
5411         irqreturn_t rc = IRQ_NONE;
5412         LIST_HEAD(doneq);
5413 
5414         spin_lock_irqsave(hrrq->lock, hrrq_flags);
5415         /* If interrupts are disabled, ignore the interrupt */
5416         if (!hrrq->allow_interrupts) {
5417                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5418                 return IRQ_NONE;
5419         }
5420 
5421         while (1) {
5422                 if (ipr_process_hrrq(hrrq, -1, &doneq)) {
5423                         rc =  IRQ_HANDLED;
5424 
5425                         if (!ioa_cfg->clear_isr)
5426                                 break;
5427 
5428                         /* Clear the PCI interrupt */
5429                         num_hrrq = 0;
5430                         do {
5431                                 writel(IPR_PCII_HRRQ_UPDATED,
5432                                      ioa_cfg->regs.clr_interrupt_reg32);
5433                                 int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5434                         } while (int_reg & IPR_PCII_HRRQ_UPDATED &&
5435                                 num_hrrq++ < IPR_MAX_HRRQ_RETRIES);
5436 
5437                 } else if (rc == IRQ_NONE && irq_none == 0) {
5438                         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5439                         irq_none++;
5440                 } else if (num_hrrq == IPR_MAX_HRRQ_RETRIES &&
5441                            int_reg & IPR_PCII_HRRQ_UPDATED) {
5442                         ipr_isr_eh(ioa_cfg,
5443                                 "Error clearing HRRQ: ", num_hrrq);
5444                         rc = IRQ_HANDLED;
5445                         break;
5446                 } else
5447                         break;
5448         }
5449 
5450         if (unlikely(rc == IRQ_NONE))
5451                 rc = ipr_handle_other_interrupt(ioa_cfg, int_reg);
5452 
5453         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5454         list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5455                 list_del(&ipr_cmd->queue);
5456                 del_timer(&ipr_cmd->timer);
5457                 ipr_cmd->fast_done(ipr_cmd);
5458         }
5459         return rc;
5460 }
5461 
5462 /**
5463  * ipr_isr_mhrrq - Interrupt service routine
5464  * @irq:        irq number
5465  * @devp:       pointer to ioa config struct
5466  *
5467  * Return value:
5468  *      IRQ_NONE / IRQ_HANDLED
5469  **/
5470 static irqreturn_t ipr_isr_mhrrq(int irq, void *devp)
5471 {
5472         struct ipr_hrr_queue *hrrq = (struct ipr_hrr_queue *)devp;
5473         struct ipr_ioa_cfg *ioa_cfg = hrrq->ioa_cfg;
5474         unsigned long hrrq_flags = 0;
5475         struct ipr_cmnd *ipr_cmd, *temp;
5476         irqreturn_t rc = IRQ_NONE;
5477         LIST_HEAD(doneq);
5478 
5479         spin_lock_irqsave(hrrq->lock, hrrq_flags);
5480 
5481         /* If interrupts are disabled, ignore the interrupt */
5482         if (!hrrq->allow_interrupts) {
5483                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5484                 return IRQ_NONE;
5485         }
5486 
5487         if (blk_iopoll_enabled && ioa_cfg->iopoll_weight &&
5488                         ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
5489                 if ((be32_to_cpu(*hrrq->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5490                        hrrq->toggle_bit) {
5491                         if (!blk_iopoll_sched_prep(&hrrq->iopoll))
5492                                 blk_iopoll_sched(&hrrq->iopoll);
5493                         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5494                         return IRQ_HANDLED;
5495                 }
5496         } else {
5497                 if ((be32_to_cpu(*hrrq->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5498                         hrrq->toggle_bit)
5499 
5500                         if (ipr_process_hrrq(hrrq, -1, &doneq))
5501                                 rc =  IRQ_HANDLED;
5502         }
5503 
5504         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5505 
5506         list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5507                 list_del(&ipr_cmd->queue);
5508                 del_timer(&ipr_cmd->timer);
5509                 ipr_cmd->fast_done(ipr_cmd);
5510         }
5511         return rc;
5512 }
5513 
5514 /**
5515  * ipr_build_ioadl64 - Build a scatter/gather list and map the buffer
5516  * @ioa_cfg:    ioa config struct
5517  * @ipr_cmd:    ipr command struct
5518  *
5519  * Return value:
5520  *      0 on success / -1 on failure
5521  **/
5522 static int ipr_build_ioadl64(struct ipr_ioa_cfg *ioa_cfg,
5523                              struct ipr_cmnd *ipr_cmd)
5524 {
5525         int i, nseg;
5526         struct scatterlist *sg;
5527         u32 length;
5528         u32 ioadl_flags = 0;
5529         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5530         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5531         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
5532 
5533         length = scsi_bufflen(scsi_cmd);
5534         if (!length)
5535                 return 0;
5536 
5537         nseg = scsi_dma_map(scsi_cmd);
5538         if (nseg < 0) {
5539                 if (printk_ratelimit())
5540                         dev_err(&ioa_cfg->pdev->dev, "pci_map_sg failed!\n");
5541                 return -1;
5542         }
5543 
5544         ipr_cmd->dma_use_sg = nseg;
5545 
5546         ioarcb->data_transfer_length = cpu_to_be32(length);
5547         ioarcb->ioadl_len =
5548                 cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
5549 
5550         if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) {
5551                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
5552                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
5553         } else if (scsi_cmd->sc_data_direction == DMA_FROM_DEVICE)
5554                 ioadl_flags = IPR_IOADL_FLAGS_READ;
5555 
5556         scsi_for_each_sg(scsi_cmd, sg, ipr_cmd->dma_use_sg, i) {
5557                 ioadl64[i].flags = cpu_to_be32(ioadl_flags);
5558                 ioadl64[i].data_len = cpu_to_be32(sg_dma_len(sg));
5559                 ioadl64[i].address = cpu_to_be64(sg_dma_address(sg));
5560         }
5561 
5562         ioadl64[i-1].flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
5563         return 0;
5564 }
5565 
5566 /**
5567  * ipr_build_ioadl - Build a scatter/gather list and map the buffer
5568  * @ioa_cfg:    ioa config struct
5569  * @ipr_cmd:    ipr command struct
5570  *
5571  * Return value:
5572  *      0 on success / -1 on failure
5573  **/
5574 static int ipr_build_ioadl(struct ipr_ioa_cfg *ioa_cfg,
5575                            struct ipr_cmnd *ipr_cmd)
5576 {
5577         int i, nseg;
5578         struct scatterlist *sg;
5579         u32 length;
5580         u32 ioadl_flags = 0;
5581         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5582         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5583         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
5584 
5585         length = scsi_bufflen(scsi_cmd);
5586         if (!length)
5587                 return 0;
5588 
5589         nseg = scsi_dma_map(scsi_cmd);
5590         if (nseg < 0) {
5591                 dev_err(&ioa_cfg->pdev->dev, "pci_map_sg failed!\n");
5592                 return -1;
5593         }
5594 
5595         ipr_cmd->dma_use_sg = nseg;
5596 
5597         if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) {
5598                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
5599                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
5600                 ioarcb->data_transfer_length = cpu_to_be32(length);
5601                 ioarcb->ioadl_len =
5602                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
5603         } else if (scsi_cmd->sc_data_direction == DMA_FROM_DEVICE) {
5604                 ioadl_flags = IPR_IOADL_FLAGS_READ;
5605                 ioarcb->read_data_transfer_length = cpu_to_be32(length);
5606                 ioarcb->read_ioadl_len =
5607                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
5608         }
5609 
5610         if (ipr_cmd->dma_use_sg <= ARRAY_SIZE(ioarcb->u.add_data.u.ioadl)) {
5611                 ioadl = ioarcb->u.add_data.u.ioadl;
5612                 ioarcb->write_ioadl_addr = cpu_to_be32((ipr_cmd->dma_addr) +
5613                                     offsetof(struct ipr_ioarcb, u.add_data));
5614                 ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
5615         }
5616 
5617         scsi_for_each_sg(scsi_cmd, sg, ipr_cmd->dma_use_sg, i) {
5618                 ioadl[i].flags_and_data_len =
5619                         cpu_to_be32(ioadl_flags | sg_dma_len(sg));
5620                 ioadl[i].address = cpu_to_be32(sg_dma_address(sg));
5621         }
5622 
5623         ioadl[i-1].flags_and_data_len |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
5624         return 0;
5625 }
5626 
5627 /**
5628  * ipr_get_task_attributes - Translate SPI Q-Tag to task attributes
5629  * @scsi_cmd:   scsi command struct
5630  *
5631  * Return value:
5632  *      task attributes
5633  **/
5634 static u8 ipr_get_task_attributes(struct scsi_cmnd *scsi_cmd)
5635 {
5636         u8 tag[2];
5637         u8 rc = IPR_FLAGS_LO_UNTAGGED_TASK;
5638 
5639         if (scsi_populate_tag_msg(scsi_cmd, tag)) {
5640                 switch (tag[0]) {
5641                 case MSG_SIMPLE_TAG:
5642                         rc = IPR_FLAGS_LO_SIMPLE_TASK;
5643                         break;
5644                 case MSG_HEAD_TAG:
5645                         rc = IPR_FLAGS_LO_HEAD_OF_Q_TASK;
5646                         break;
5647                 case MSG_ORDERED_TAG:
5648                         rc = IPR_FLAGS_LO_ORDERED_TASK;
5649                         break;
5650                 };
5651         }
5652 
5653         return rc;
5654 }
5655 
5656 /**
5657  * ipr_erp_done - Process completion of ERP for a device
5658  * @ipr_cmd:            ipr command struct
5659  *
5660  * This function copies the sense buffer into the scsi_cmd
5661  * struct and pushes the scsi_done function.
5662  *
5663  * Return value:
5664  *      nothing
5665  **/
5666 static void ipr_erp_done(struct ipr_cmnd *ipr_cmd)
5667 {
5668         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5669         struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
5670         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5671 
5672         if (IPR_IOASC_SENSE_KEY(ioasc) > 0) {
5673                 scsi_cmd->result |= (DID_ERROR << 16);
5674                 scmd_printk(KERN_ERR, scsi_cmd,
5675                             "Request Sense failed with IOASC: 0x%08X\n", ioasc);
5676         } else {
5677                 memcpy(scsi_cmd->sense_buffer, ipr_cmd->sense_buffer,
5678                        SCSI_SENSE_BUFFERSIZE);
5679         }
5680 
5681         if (res) {
5682                 if (!ipr_is_naca_model(res))
5683                         res->needs_sync_complete = 1;
5684                 res->in_erp = 0;
5685         }
5686         scsi_dma_unmap(ipr_cmd->scsi_cmd);
5687         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5688         scsi_cmd->scsi_done(scsi_cmd);
5689 }
5690 
5691 /**
5692  * ipr_reinit_ipr_cmnd_for_erp - Re-initialize a cmnd block to be used for ERP
5693  * @ipr_cmd:    ipr command struct
5694  *
5695  * Return value:
5696  *      none
5697  **/
5698 static void ipr_reinit_ipr_cmnd_for_erp(struct ipr_cmnd *ipr_cmd)
5699 {
5700         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5701         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
5702         dma_addr_t dma_addr = ipr_cmd->dma_addr;
5703 
5704         memset(&ioarcb->cmd_pkt, 0, sizeof(struct ipr_cmd_pkt));
5705         ioarcb->data_transfer_length = 0;
5706         ioarcb->read_data_transfer_length = 0;
5707         ioarcb->ioadl_len = 0;
5708         ioarcb->read_ioadl_len = 0;
5709         ioasa->hdr.ioasc = 0;
5710         ioasa->hdr.residual_data_len = 0;
5711 
5712         if (ipr_cmd->ioa_cfg->sis64)
5713                 ioarcb->u.sis64_addr_data.data_ioadl_addr =
5714                         cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ioadl64));
5715         else {
5716                 ioarcb->write_ioadl_addr =
5717                         cpu_to_be32(dma_addr + offsetof(struct ipr_cmnd, i.ioadl));
5718                 ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
5719         }
5720 }
5721 
5722 /**
5723  * ipr_erp_request_sense - Send request sense to a device
5724  * @ipr_cmd:    ipr command struct
5725  *
5726  * This function sends a request sense to a device as a result
5727  * of a check condition.
5728  *
5729  * Return value:
5730  *      nothing
5731  **/
5732 static void ipr_erp_request_sense(struct ipr_cmnd *ipr_cmd)
5733 {
5734         struct ipr_cmd_pkt *cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5735         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5736 
5737         if (IPR_IOASC_SENSE_KEY(ioasc) > 0) {
5738                 ipr_erp_done(ipr_cmd);
5739                 return;
5740         }
5741 
5742         ipr_reinit_ipr_cmnd_for_erp(ipr_cmd);
5743 
5744         cmd_pkt->request_type = IPR_RQTYPE_SCSICDB;
5745         cmd_pkt->cdb[0] = REQUEST_SENSE;
5746         cmd_pkt->cdb[4] = SCSI_SENSE_BUFFERSIZE;
5747         cmd_pkt->flags_hi |= IPR_FLAGS_HI_SYNC_OVERRIDE;
5748         cmd_pkt->flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
5749         cmd_pkt->timeout = cpu_to_be16(IPR_REQUEST_SENSE_TIMEOUT / HZ);
5750 
5751         ipr_init_ioadl(ipr_cmd, ipr_cmd->sense_buffer_dma,
5752                        SCSI_SENSE_BUFFERSIZE, IPR_IOADL_FLAGS_READ_LAST);
5753 
5754         ipr_do_req(ipr_cmd, ipr_erp_done, ipr_timeout,
5755                    IPR_REQUEST_SENSE_TIMEOUT * 2);
5756 }
5757 
5758 /**
5759  * ipr_erp_cancel_all - Send cancel all to a device
5760  * @ipr_cmd:    ipr command struct
5761  *
5762  * This function sends a cancel all to a device to clear the
5763  * queue. If we are running TCQ on the device, QERR is set to 1,
5764  * which means all outstanding ops have been dropped on the floor.
5765  * Cancel all will return them to us.
5766  *
5767  * Return value:
5768  *      nothing
5769  **/
5770 static void ipr_erp_cancel_all(struct ipr_cmnd *ipr_cmd)
5771 {
5772         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5773         struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
5774         struct ipr_cmd_pkt *cmd_pkt;
5775 
5776         res->in_erp = 1;
5777 
5778         ipr_reinit_ipr_cmnd_for_erp(ipr_cmd);
5779 
5780         if (!scsi_get_tag_type(scsi_cmd->device)) {
5781                 ipr_erp_request_sense(ipr_cmd);
5782                 return;
5783         }
5784 
5785         cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5786         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5787         cmd_pkt->cdb[0] = IPR_CANCEL_ALL_REQUESTS;
5788 
5789         ipr_do_req(ipr_cmd, ipr_erp_request_sense, ipr_timeout,
5790                    IPR_CANCEL_ALL_TIMEOUT);
5791 }
5792 
5793 /**
5794  * ipr_dump_ioasa - Dump contents of IOASA
5795  * @ioa_cfg:    ioa config struct
5796  * @ipr_cmd:    ipr command struct
5797  * @res:                resource entry struct
5798  *
5799  * This function is invoked by the interrupt handler when ops
5800  * fail. It will log the IOASA if appropriate. Only called
5801  * for GPDD ops.
5802  *
5803  * Return value:
5804  *      none
5805  **/
5806 static void ipr_dump_ioasa(struct ipr_ioa_cfg *ioa_cfg,
5807                            struct ipr_cmnd *ipr_cmd, struct ipr_resource_entry *res)
5808 {
5809         int i;
5810         u16 data_len;
5811         u32 ioasc, fd_ioasc;
5812         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
5813         __be32 *ioasa_data = (__be32 *)ioasa;
5814         int error_index;
5815 
5816         ioasc = be32_to_cpu(ioasa->hdr.ioasc) & IPR_IOASC_IOASC_MASK;
5817         fd_ioasc = be32_to_cpu(ioasa->hdr.fd_ioasc) & IPR_IOASC_IOASC_MASK;
5818 
5819         if (0 == ioasc)
5820                 return;
5821 
5822         if (ioa_cfg->log_level < IPR_DEFAULT_LOG_LEVEL)
5823                 return;
5824 
5825         if (ioasc == IPR_IOASC_BUS_WAS_RESET && fd_ioasc)
5826                 error_index = ipr_get_error(fd_ioasc);
5827         else
5828                 error_index = ipr_get_error(ioasc);
5829 
5830         if (ioa_cfg->log_level < IPR_MAX_LOG_LEVEL) {
5831                 /* Don't log an error if the IOA already logged one */
5832                 if (ioasa->hdr.ilid != 0)
5833                         return;
5834 
5835                 if (!ipr_is_gscsi(res))
5836                         return;
5837 
5838                 if (ipr_error_table[error_index].log_ioasa == 0)
5839                         return;
5840         }
5841 
5842         ipr_res_err(ioa_cfg, res, "%s\n", ipr_error_table[error_index].error);
5843 
5844         data_len = be16_to_cpu(ioasa->hdr.ret_stat_len);
5845         if (ioa_cfg->sis64 && sizeof(struct ipr_ioasa64) < data_len)
5846                 data_len = sizeof(struct ipr_ioasa64);
5847         else if (!ioa_cfg->sis64 && sizeof(struct ipr_ioasa) < data_len)
5848                 data_len = sizeof(struct ipr_ioasa);
5849 
5850         ipr_err("IOASA Dump:\n");
5851 
5852         for (i = 0; i < data_len / 4; i += 4) {
5853                 ipr_err("%08X: %08X %08X %08X %08X\n", i*4,
5854                         be32_to_cpu(ioasa_data[i]),
5855                         be32_to_cpu(ioasa_data[i+1]),
5856                         be32_to_cpu(ioasa_data[i+2]),
5857                         be32_to_cpu(ioasa_data[i+3]));
5858         }
5859 }
5860 
5861 /**
5862  * ipr_gen_sense - Generate SCSI sense data from an IOASA
5863  * @ioasa:              IOASA
5864  * @sense_buf:  sense data buffer
5865  *
5866  * Return value:
5867  *      none
5868  **/
5869 static void ipr_gen_sense(struct ipr_cmnd *ipr_cmd)
5870 {
5871         u32 failing_lba;
5872         u8 *sense_buf = ipr_cmd->scsi_cmd->sense_buffer;
5873         struct ipr_resource_entry *res = ipr_cmd->scsi_cmd->device->hostdata;
5874         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
5875         u32 ioasc = be32_to_cpu(ioasa->hdr.ioasc);
5876 
5877         memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
5878 
5879         if (ioasc >= IPR_FIRST_DRIVER_IOASC)
5880                 return;
5881 
5882         ipr_cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
5883 
5884         if (ipr_is_vset_device(res) &&
5885             ioasc == IPR_IOASC_MED_DO_NOT_REALLOC &&
5886             ioasa->u.vset.failing_lba_hi != 0) {
5887                 sense_buf[0] = 0x72;
5888                 sense_buf[1] = IPR_IOASC_SENSE_KEY(ioasc);
5889                 sense_buf[2] = IPR_IOASC_SENSE_CODE(ioasc);
5890                 sense_buf[3] = IPR_IOASC_SENSE_QUAL(ioasc);
5891 
5892                 sense_buf[7] = 12;
5893                 sense_buf[8] = 0;
5894                 sense_buf[9] = 0x0A;
5895                 sense_buf[10] = 0x80;
5896 
5897                 failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_hi);
5898 
5899                 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
5900                 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
5901                 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
5902                 sense_buf[15] = failing_lba & 0x000000ff;
5903 
5904                 failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_lo);
5905 
5906                 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
5907                 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
5908                 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
5909                 sense_buf[19] = failing_lba & 0x000000ff;
5910         } else {
5911                 sense_buf[0] = 0x70;
5912                 sense_buf[2] = IPR_IOASC_SENSE_KEY(ioasc);
5913                 sense_buf[12] = IPR_IOASC_SENSE_CODE(ioasc);
5914                 sense_buf[13] = IPR_IOASC_SENSE_QUAL(ioasc);
5915 
5916                 /* Illegal request */
5917                 if ((IPR_IOASC_SENSE_KEY(ioasc) == 0x05) &&
5918                     (be32_to_cpu(ioasa->hdr.ioasc_specific) & IPR_FIELD_POINTER_VALID)) {
5919                         sense_buf[7] = 10;      /* additional length */
5920 
5921                         /* IOARCB was in error */
5922                         if (IPR_IOASC_SENSE_CODE(ioasc) == 0x24)
5923                                 sense_buf[15] = 0xC0;
5924                         else    /* Parameter data was invalid */
5925                                 sense_buf[15] = 0x80;
5926 
5927                         sense_buf[16] =
5928                             ((IPR_FIELD_POINTER_MASK &
5929                               be32_to_cpu(ioasa->hdr.ioasc_specific)) >> 8) & 0xff;
5930                         sense_buf[17] =
5931                             (IPR_FIELD_POINTER_MASK &
5932                              be32_to_cpu(ioasa->hdr.ioasc_specific)) & 0xff;
5933                 } else {
5934                         if (ioasc == IPR_IOASC_MED_DO_NOT_REALLOC) {
5935                                 if (ipr_is_vset_device(res))
5936                                         failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_lo);
5937                                 else
5938                                         failing_lba = be32_to_cpu(ioasa->u.dasd.failing_lba);
5939 
5940                                 sense_buf[0] |= 0x80;   /* Or in the Valid bit */
5941                                 sense_buf[3] = (failing_lba & 0xff000000) >> 24;
5942                                 sense_buf[4] = (failing_lba & 0x00ff0000) >> 16;
5943                                 sense_buf[5] = (failing_lba & 0x0000ff00) >> 8;
5944                                 sense_buf[6] = failing_lba & 0x000000ff;
5945                         }
5946 
5947                         sense_buf[7] = 6;       /* additional length */
5948                 }
5949         }
5950 }
5951 
5952 /**
5953  * ipr_get_autosense - Copy autosense data to sense buffer
5954  * @ipr_cmd:    ipr command struct
5955  *
5956  * This function copies the autosense buffer to the buffer
5957  * in the scsi_cmd, if there is autosense available.
5958  *
5959  * Return value:
5960  *      1 if autosense was available / 0 if not
5961  **/
5962 static int ipr_get_autosense(struct ipr_cmnd *ipr_cmd)
5963 {
5964         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
5965         struct ipr_ioasa64 *ioasa64 = &ipr_cmd->s.ioasa64;
5966 
5967         if ((be32_to_cpu(ioasa->hdr.ioasc_specific) & IPR_AUTOSENSE_VALID) == 0)
5968                 return 0;
5969 
5970         if (ipr_cmd->ioa_cfg->sis64)
5971                 memcpy(ipr_cmd->scsi_cmd->sense_buffer, ioasa64->auto_sense.data,
5972                        min_t(u16, be16_to_cpu(ioasa64->auto_sense.auto_sense_len),
5973                            SCSI_SENSE_BUFFERSIZE));
5974         else
5975                 memcpy(ipr_cmd->scsi_cmd->sense_buffer, ioasa->auto_sense.data,
5976                        min_t(u16, be16_to_cpu(ioasa->auto_sense.auto_sense_len),
5977                            SCSI_SENSE_BUFFERSIZE));
5978         return 1;
5979 }
5980 
5981 /**
5982  * ipr_erp_start - Process an error response for a SCSI op
5983  * @ioa_cfg:    ioa config struct
5984  * @ipr_cmd:    ipr command struct
5985  *
5986  * This function determines whether or not to initiate ERP
5987  * on the affected device.
5988  *
5989  * Return value:
5990  *      nothing
5991  **/
5992 static void ipr_erp_start(struct ipr_ioa_cfg *ioa_cfg,
5993                               struct ipr_cmnd *ipr_cmd)
5994 {
5995         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5996         struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
5997         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5998         u32 masked_ioasc = ioasc & IPR_IOASC_IOASC_MASK;
5999 
6000         if (!res) {
6001                 ipr_scsi_eh_done(ipr_cmd);
6002                 return;
6003         }
6004 
6005         if (!ipr_is_gscsi(res) && masked_ioasc != IPR_IOASC_HW_DEV_BUS_STATUS)
6006                 ipr_gen_sense(ipr_cmd);
6007 
6008         ipr_dump_ioasa(ioa_cfg, ipr_cmd, res);
6009 
6010         switch (masked_ioasc) {
6011         case IPR_IOASC_ABORTED_CMD_TERM_BY_HOST:
6012                 if (ipr_is_naca_model(res))
6013                         scsi_cmd->result |= (DID_ABORT << 16);
6014                 else
6015                         scsi_cmd->result |= (DID_IMM_RETRY << 16);
6016                 break;
6017         case IPR_IOASC_IR_RESOURCE_HANDLE:
6018         case IPR_IOASC_IR_NO_CMDS_TO_2ND_IOA:
6019                 scsi_cmd->result |= (DID_NO_CONNECT << 16);
6020                 break;
6021         case IPR_IOASC_HW_SEL_TIMEOUT:
6022                 scsi_cmd->result |= (DID_NO_CONNECT << 16);
6023                 if (!ipr_is_naca_model(res))
6024                         res->needs_sync_complete = 1;
6025                 break;
6026         case IPR_IOASC_SYNC_REQUIRED:
6027                 if (!res->in_erp)
6028                         res->needs_sync_complete = 1;
6029                 scsi_cmd->result |= (DID_IMM_RETRY << 16);
6030                 break;
6031         case IPR_IOASC_MED_DO_NOT_REALLOC: /* prevent retries */
6032         case IPR_IOASA_IR_DUAL_IOA_DISABLED:
6033                 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
6034                 break;
6035         case IPR_IOASC_BUS_WAS_RESET:
6036         case IPR_IOASC_BUS_WAS_RESET_BY_OTHER:
6037                 /*
6038                  * Report the bus reset and ask for a retry. The device
6039                  * will give CC/UA the next command.
6040                  */
6041                 if (!res->resetting_device)
6042                         scsi_report_bus_reset(ioa_cfg->host, scsi_cmd->device->channel);
6043                 scsi_cmd->result |= (DID_ERROR << 16);
6044                 if (!ipr_is_naca_model(res))
6045                         res->needs_sync_complete = 1;
6046                 break;
6047         case IPR_IOASC_HW_DEV_BUS_STATUS:
6048                 scsi_cmd->result |= IPR_IOASC_SENSE_STATUS(ioasc);
6049                 if (IPR_IOASC_SENSE_STATUS(ioasc) == SAM_STAT_CHECK_CONDITION) {
6050                         if (!ipr_get_autosense(ipr_cmd)) {
6051                                 if (!ipr_is_naca_model(res)) {
6052                                         ipr_erp_cancel_all(ipr_cmd);
6053                                         return;
6054                                 }
6055                         }
6056                 }
6057                 if (!ipr_is_naca_model(res))
6058                         res->needs_sync_complete = 1;
6059                 break;
6060         case IPR_IOASC_NR_INIT_CMD_REQUIRED:
6061                 break;
6062         default:
6063                 if (IPR_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
6064                         scsi_cmd->result |= (DID_ERROR << 16);
6065                 if (!ipr_is_vset_device(res) && !ipr_is_naca_model(res))
6066                         res->needs_sync_complete = 1;
6067                 break;
6068         }
6069 
6070         scsi_dma_unmap(ipr_cmd->scsi_cmd);
6071         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6072         scsi_cmd->scsi_done(scsi_cmd);
6073 }
6074 
6075 /**
6076  * ipr_scsi_done - mid-layer done function
6077  * @ipr_cmd:    ipr command struct
6078  *
6079  * This function is invoked by the interrupt handler for
6080  * ops generated by the SCSI mid-layer
6081  *
6082  * Return value:
6083  *      none
6084  **/
6085 static void ipr_scsi_done(struct ipr_cmnd *ipr_cmd)
6086 {
6087         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6088         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
6089         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
6090         unsigned long hrrq_flags;
6091 
6092         scsi_set_resid(scsi_cmd, be32_to_cpu(ipr_cmd->s.ioasa.hdr.residual_data_len));
6093 
6094         if (likely(IPR_IOASC_SENSE_KEY(ioasc) == 0)) {
6095                 scsi_dma_unmap(scsi_cmd);
6096 
6097                 spin_lock_irqsave(ipr_cmd->hrrq->lock, hrrq_flags);
6098                 list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6099                 scsi_cmd->scsi_done(scsi_cmd);
6100                 spin_unlock_irqrestore(ipr_cmd->hrrq->lock, hrrq_flags);
6101         } else {
6102                 spin_lock_irqsave(ipr_cmd->hrrq->lock, hrrq_flags);
6103                 ipr_erp_start(ioa_cfg, ipr_cmd);
6104                 spin_unlock_irqrestore(ipr_cmd->hrrq->lock, hrrq_flags);
6105         }
6106 }
6107 
6108 /**
6109  * ipr_queuecommand - Queue a mid-layer request
6110  * @shost:              scsi host struct
6111  * @scsi_cmd:   scsi command struct
6112  *
6113  * This function queues a request generated by the mid-layer.
6114  *
6115  * Return value:
6116  *      0 on success
6117  *      SCSI_MLQUEUE_DEVICE_BUSY if device is busy
6118  *      SCSI_MLQUEUE_HOST_BUSY if host is busy
6119  **/
6120 static int ipr_queuecommand(struct Scsi_Host *shost,
6121                             struct scsi_cmnd *scsi_cmd)
6122 {
6123         struct ipr_ioa_cfg *ioa_cfg;
6124         struct ipr_resource_entry *res;
6125         struct ipr_ioarcb *ioarcb;
6126         struct ipr_cmnd *ipr_cmd;
6127         unsigned long hrrq_flags, lock_flags;
6128         int rc;
6129         struct ipr_hrr_queue *hrrq;
6130         int hrrq_id;
6131 
6132         ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
6133 
6134         scsi_cmd->result = (DID_OK << 16);
6135         res = scsi_cmd->device->hostdata;
6136 
6137         if (ipr_is_gata(res) && res->sata_port) {
6138                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
6139                 rc = ata_sas_queuecmd(scsi_cmd, res->sata_port->ap);
6140                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
6141                 return rc;
6142         }
6143 
6144         hrrq_id = ipr_get_hrrq_index(ioa_cfg);
6145         hrrq = &ioa_cfg->hrrq[hrrq_id];
6146 
6147         spin_lock_irqsave(hrrq->lock, hrrq_flags);
6148         /*
6149          * We are currently blocking all devices due to a host reset
6150          * We have told the host to stop giving us new requests, but
6151          * ERP ops don't count. FIXME
6152          */
6153         if (unlikely(!hrrq->allow_cmds && !hrrq->ioa_is_dead && !hrrq->removing_ioa)) {
6154                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6155                 return SCSI_MLQUEUE_HOST_BUSY;
6156         }
6157 
6158         /*
6159          * FIXME - Create scsi_set_host_offline interface
6160          *  and the ioa_is_dead check can be removed
6161          */
6162         if (unlikely(hrrq->ioa_is_dead || hrrq->removing_ioa || !res)) {
6163                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6164                 goto err_nodev;
6165         }
6166 
6167         ipr_cmd = __ipr_get_free_ipr_cmnd(hrrq);
6168         if (ipr_cmd == NULL) {
6169                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6170                 return SCSI_MLQUEUE_HOST_BUSY;
6171         }
6172         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6173 
6174         ipr_init_ipr_cmnd(ipr_cmd, ipr_scsi_done);
6175         ioarcb = &ipr_cmd->ioarcb;
6176 
6177         memcpy(ioarcb->cmd_pkt.cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
6178         ipr_cmd->scsi_cmd = scsi_cmd;
6179         ipr_cmd->done = ipr_scsi_eh_done;
6180 
6181         if (ipr_is_gscsi(res) || ipr_is_vset_device(res)) {
6182                 if (scsi_cmd->underflow == 0)
6183                         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
6184 
6185                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_LINK_DESC;
6186                 if (ipr_is_gscsi(res))
6187                         ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_DELAY_AFTER_RST;
6188                 ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_ALIGNED_BFR;
6189                 ioarcb->cmd_pkt.flags_lo |= ipr_get_task_attributes(scsi_cmd);
6190         }
6191 
6192         if (scsi_cmd->cmnd[0] >= 0xC0 &&
6193             (!ipr_is_gscsi(res) || scsi_cmd->cmnd[0] == IPR_QUERY_RSRC_STATE)) {
6194                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
6195         }
6196 
6197         if (ioa_cfg->sis64)
6198                 rc = ipr_build_ioadl64(ioa_cfg, ipr_cmd);
6199         else
6200                 rc = ipr_build_ioadl(ioa_cfg, ipr_cmd);
6201 
6202         spin_lock_irqsave(hrrq->lock, hrrq_flags);
6203         if (unlikely(rc || (!hrrq->allow_cmds && !hrrq->ioa_is_dead))) {
6204                 list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_free_q);
6205                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6206                 if (!rc)
6207                         scsi_dma_unmap(scsi_cmd);
6208                 return SCSI_MLQUEUE_HOST_BUSY;
6209         }
6210 
6211         if (unlikely(hrrq->ioa_is_dead)) {
6212                 list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_free_q);
6213                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6214                 scsi_dma_unmap(scsi_cmd);
6215                 goto err_nodev;
6216         }
6217 
6218         ioarcb->res_handle = res->res_handle;
6219         if (res->needs_sync_complete) {
6220                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_SYNC_COMPLETE;
6221                 res->needs_sync_complete = 0;
6222         }
6223         list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_pending_q);
6224         ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_GET_RES_PHYS_LOC(res));
6225         ipr_send_command(ipr_cmd);
6226         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6227         return 0;
6228 
6229 err_nodev:
6230         spin_lock_irqsave(hrrq->lock, hrrq_flags);
6231         memset(scsi_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
6232         scsi_cmd->result = (DID_NO_CONNECT << 16);
6233         scsi_cmd->scsi_done(scsi_cmd);
6234         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6235         return 0;
6236 }
6237 
6238 /**
6239  * ipr_ioctl - IOCTL handler
6240  * @sdev:       scsi device struct
6241  * @cmd:        IOCTL cmd
6242  * @arg:        IOCTL arg
6243  *
6244  * Return value:
6245  *      0 on success / other on failure
6246  **/
6247 static int ipr_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
6248 {
6249         struct ipr_resource_entry *res;
6250 
6251         res = (struct ipr_resource_entry *)sdev->hostdata;
6252         if (res && ipr_is_gata(res)) {
6253                 if (cmd == HDIO_GET_IDENTITY)
6254                         return -ENOTTY;
6255                 return ata_sas_scsi_ioctl(res->sata_port->ap, sdev, cmd, arg);
6256         }
6257 
6258         return -EINVAL;
6259 }
6260 
6261 /**
6262  * ipr_info - Get information about the card/driver
6263  * @scsi_host:  scsi host struct
6264  *
6265  * Return value:
6266  *      pointer to buffer with description string
6267  **/
6268 static const char *ipr_ioa_info(struct Scsi_Host *host)
6269 {
6270         static char buffer[512];
6271         struct ipr_ioa_cfg *ioa_cfg;
6272         unsigned long lock_flags = 0;
6273 
6274         ioa_cfg = (struct ipr_ioa_cfg *) host->hostdata;
6275 
6276         spin_lock_irqsave(host->host_lock, lock_flags);
6277         sprintf(buffer, "IBM %X Storage Adapter", ioa_cfg->type);
6278         spin_unlock_irqrestore(host->host_lock, lock_flags);
6279 
6280         return buffer;
6281 }
6282 
6283 static struct scsi_host_template driver_template = {
6284         .module = THIS_MODULE,
6285         .name = "IPR",
6286         .info = ipr_ioa_info,
6287         .ioctl = ipr_ioctl,
6288         .queuecommand = ipr_queuecommand,
6289         .eh_abort_handler = ipr_eh_abort,
6290         .eh_device_reset_handler = ipr_eh_dev_reset,
6291         .eh_host_reset_handler = ipr_eh_host_reset,
6292         .slave_alloc = ipr_slave_alloc,
6293         .slave_configure = ipr_slave_configure,
6294         .slave_destroy = ipr_slave_destroy,
6295         .target_alloc = ipr_target_alloc,
6296         .target_destroy = ipr_target_destroy,
6297         .change_queue_depth = ipr_change_queue_depth,
6298         .change_queue_type = ipr_change_queue_type,
6299         .bios_param = ipr_biosparam,
6300         .can_queue = IPR_MAX_COMMANDS,
6301         .this_id = -1,
6302         .sg_tablesize = IPR_MAX_SGLIST,
6303         .max_sectors = IPR_IOA_MAX_SECTORS,
6304         .cmd_per_lun = IPR_MAX_CMD_PER_LUN,
6305         .use_clustering = ENABLE_CLUSTERING,
6306         .shost_attrs = ipr_ioa_attrs,
6307         .sdev_attrs = ipr_dev_attrs,
6308         .proc_name = IPR_NAME,
6309         .no_write_same = 1,
6310 };
6311 
6312 /**
6313  * ipr_ata_phy_reset - libata phy_reset handler
6314  * @ap:         ata port to reset
6315  *
6316  **/
6317 static void ipr_ata_phy_reset(struct ata_port *ap)
6318 {
6319         unsigned long flags;
6320         struct ipr_sata_port *sata_port = ap->private_data;
6321         struct ipr_resource_entry *res = sata_port->res;
6322         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6323         int rc;
6324 
6325         ENTER;
6326         spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6327         while (ioa_cfg->in_reset_reload) {
6328                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6329                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
6330                 spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6331         }
6332 
6333         if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds)
6334                 goto out_unlock;
6335 
6336         rc = ipr_device_reset(ioa_cfg, res);
6337 
6338         if (rc) {
6339                 ap->link.device[0].class = ATA_DEV_NONE;
6340                 goto out_unlock;
6341         }
6342 
6343         ap->link.device[0].class = res->ata_class;
6344         if (ap->link.device[0].class == ATA_DEV_UNKNOWN)
6345                 ap->link.device[0].class = ATA_DEV_NONE;
6346 
6347 out_unlock:
6348         spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6349         LEAVE;
6350 }
6351 
6352 /**
6353  * ipr_ata_post_internal - Cleanup after an internal command
6354  * @qc: ATA queued command
6355  *
6356  * Return value:
6357  *      none
6358  **/
6359 static void ipr_ata_post_internal(struct ata_queued_cmd *qc)
6360 {
6361         struct ipr_sata_port *sata_port = qc->ap->private_data;
6362         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6363         struct ipr_cmnd *ipr_cmd;
6364         struct ipr_hrr_queue *hrrq;
6365         unsigned long flags;
6366 
6367         spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6368         while (ioa_cfg->in_reset_reload) {
6369                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6370                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
6371                 spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6372         }
6373 
6374         for_each_hrrq(hrrq, ioa_cfg) {
6375                 spin_lock(&hrrq->_lock);
6376                 list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
6377                         if (ipr_cmd->qc == qc) {
6378                                 ipr_device_reset(ioa_cfg, sata_port->res);
6379                                 break;
6380                         }
6381                 }
6382                 spin_unlock(&hrrq->_lock);
6383         }
6384         spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6385 }
6386 
6387 /**
6388  * ipr_copy_sata_tf - Copy a SATA taskfile to an IOA data structure
6389  * @regs:       destination
6390  * @tf: source ATA taskfile
6391  *
6392  * Return value:
6393  *      none
6394  **/
6395 static void ipr_copy_sata_tf(struct ipr_ioarcb_ata_regs *regs,
6396                              struct ata_taskfile *tf)
6397 {
6398         regs->feature = tf->feature;
6399         regs->nsect = tf->nsect;
6400         regs->lbal = tf->lbal;
6401         regs->lbam = tf->lbam;
6402         regs->lbah = tf->lbah;
6403         regs->device = tf->device;
6404         regs->command = tf->command;
6405         regs->hob_feature = tf->hob_feature;
6406         regs->hob_nsect = tf->hob_nsect;
6407         regs->hob_lbal = tf->hob_lbal;
6408         regs->hob_lbam = tf->hob_lbam;
6409         regs->hob_lbah = tf->hob_lbah;
6410         regs->ctl = tf->ctl;
6411 }
6412 
6413 /**
6414  * ipr_sata_done - done function for SATA commands
6415  * @ipr_cmd:    ipr command struct
6416  *
6417  * This function is invoked by the interrupt handler for
6418  * ops generated by the SCSI mid-layer to SATA devices
6419  *
6420  * Return value:
6421  *      none
6422  **/
6423 static void ipr_sata_done(struct ipr_cmnd *ipr_cmd)
6424 {
6425         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6426         struct ata_queued_cmd *qc = ipr_cmd->qc;
6427         struct ipr_sata_port *sata_port = qc->ap->private_data;
6428         struct ipr_resource_entry *res = sata_port->res;
6429         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
6430 
6431         spin_lock(&ipr_cmd->hrrq->_lock);
6432         if (ipr_cmd->ioa_cfg->sis64)
6433                 memcpy(&sata_port->ioasa, &ipr_cmd->s.ioasa64.u.gata,
6434                        sizeof(struct ipr_ioasa_gata));
6435         else
6436                 memcpy(&sata_port->ioasa, &ipr_cmd->s.ioasa.u.gata,
6437                        sizeof(struct ipr_ioasa_gata));
6438         ipr_dump_ioasa(ioa_cfg, ipr_cmd, res);
6439 
6440         if (be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc_specific) & IPR_ATA_DEVICE_WAS_RESET)
6441                 scsi_report_device_reset(ioa_cfg->host, res->bus, res->target);
6442 
6443         if (IPR_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
6444                 qc->err_mask |= __ac_err_mask(sata_port->ioasa.status);
6445         else
6446                 qc->err_mask |= ac_err_mask(sata_port->ioasa.status);
6447         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6448         spin_unlock(&ipr_cmd->hrrq->_lock);
6449         ata_qc_complete(qc);
6450 }
6451 
6452 /**
6453  * ipr_build_ata_ioadl64 - Build an ATA scatter/gather list
6454  * @ipr_cmd:    ipr command struct
6455  * @qc:         ATA queued command
6456  *
6457  **/
6458 static void ipr_build_ata_ioadl64(struct ipr_cmnd *ipr_cmd,
6459                                   struct ata_queued_cmd *qc)
6460 {
6461         u32 ioadl_flags = 0;
6462         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
6463         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ata_ioadl.ioadl64;
6464         struct ipr_ioadl64_desc *last_ioadl64 = NULL;
6465         int len = qc->nbytes;
6466         struct scatterlist *sg;
6467         unsigned int si;
6468         dma_addr_t dma_addr = ipr_cmd->dma_addr;
6469 
6470         if (len == 0)
6471                 return;
6472 
6473         if (qc->dma_dir == DMA_TO_DEVICE) {
6474                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
6475                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
6476         } else if (qc->dma_dir == DMA_FROM_DEVICE)
6477                 ioadl_flags = IPR_IOADL_FLAGS_READ;
6478 
6479         ioarcb->data_transfer_length = cpu_to_be32(len);
6480         ioarcb->ioadl_len =
6481                 cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
6482         ioarcb->u.sis64_addr_data.data_ioadl_addr =
6483                 cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ata_ioadl.ioadl64));
6484 
6485         for_each_sg(qc->sg, sg, qc->n_elem, si) {
6486                 ioadl64->flags = cpu_to_be32(ioadl_flags);
6487                 ioadl64->data_len = cpu_to_be32(sg_dma_len(sg));
6488                 ioadl64->address = cpu_to_be64(sg_dma_address(sg));
6489 
6490                 last_ioadl64 = ioadl64;
6491                 ioadl64++;
6492         }
6493 
6494         if (likely(last_ioadl64))
6495                 last_ioadl64->flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
6496 }
6497 
6498 /**
6499  * ipr_build_ata_ioadl - Build an ATA scatter/gather list
6500  * @ipr_cmd:    ipr command struct
6501  * @qc:         ATA queued command
6502  *
6503  **/
6504 static void ipr_build_ata_ioadl(struct ipr_cmnd *ipr_cmd,
6505                                 struct ata_queued_cmd *qc)
6506 {
6507         u32 ioadl_flags = 0;
6508         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
6509         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
6510         struct ipr_ioadl_desc *last_ioadl = NULL;
6511         int len = qc->nbytes;
6512         struct scatterlist *sg;
6513         unsigned int si;
6514 
6515         if (len == 0)
6516                 return;
6517 
6518         if (qc->dma_dir == DMA_TO_DEVICE) {
6519                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
6520                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
6521                 ioarcb->data_transfer_length = cpu_to_be32(len);
6522                 ioarcb->ioadl_len =
6523                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
6524         } else if (qc->dma_dir == DMA_FROM_DEVICE) {
6525                 ioadl_flags = IPR_IOADL_FLAGS_READ;
6526                 ioarcb->read_data_transfer_length = cpu_to_be32(len);
6527                 ioarcb->read_ioadl_len =
6528                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
6529         }
6530 
6531         for_each_sg(qc->sg, sg, qc->n_elem, si) {
6532                 ioadl->flags_and_data_len = cpu_to_be32(ioadl_flags | sg_dma_len(sg));
6533                 ioadl->address = cpu_to_be32(sg_dma_address(sg));
6534 
6535                 last_ioadl = ioadl;
6536                 ioadl++;
6537         }
6538 
6539         if (likely(last_ioadl))
6540                 last_ioadl->flags_and_data_len |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
6541 }
6542 
6543 /**
6544  * ipr_qc_defer - Get a free ipr_cmd
6545  * @qc: queued command
6546  *
6547  * Return value:
6548  *      0 if success
6549  **/
6550 static int ipr_qc_defer(struct ata_queued_cmd *qc)
6551 {
6552         struct ata_port *ap = qc->ap;
6553         struct ipr_sata_port *sata_port = ap->private_data;
6554         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6555         struct ipr_cmnd *ipr_cmd;
6556         struct ipr_hrr_queue *hrrq;
6557         int hrrq_id;
6558 
6559         hrrq_id = ipr_get_hrrq_index(ioa_cfg);
6560         hrrq = &ioa_cfg->hrrq[hrrq_id];
6561 
6562         qc->lldd_task = NULL;
6563         spin_lock(&hrrq->_lock);
6564         if (unlikely(hrrq->ioa_is_dead)) {
6565                 spin_unlock(&hrrq->_lock);
6566                 return 0;
6567         }
6568 
6569         if (unlikely(!hrrq->allow_cmds)) {
6570                 spin_unlock(&hrrq->_lock);
6571                 return ATA_DEFER_LINK;
6572         }
6573 
6574         ipr_cmd = __ipr_get_free_ipr_cmnd(hrrq);
6575         if (ipr_cmd == NULL) {
6576                 spin_unlock(&hrrq->_lock);
6577                 return ATA_DEFER_LINK;
6578         }
6579 
6580         qc->lldd_task = ipr_cmd;
6581         spin_unlock(&hrrq->_lock);
6582         return 0;
6583 }
6584 
6585 /**
6586  * ipr_qc_issue - Issue a SATA qc to a device
6587  * @qc: queued command
6588  *
6589  * Return value:
6590  *      0 if success
6591  **/
6592 static unsigned int ipr_qc_issue(struct ata_queued_cmd *qc)
6593 {
6594         struct ata_port *ap = qc->ap;
6595         struct ipr_sata_port *sata_port = ap->private_data;
6596         struct ipr_resource_entry *res = sata_port->res;
6597         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6598         struct ipr_cmnd *ipr_cmd;
6599         struct ipr_ioarcb *ioarcb;
6600         struct ipr_ioarcb_ata_regs *regs;
6601 
6602         if (qc->lldd_task == NULL)
6603                 ipr_qc_defer(qc);
6604 
6605         ipr_cmd = qc->lldd_task;
6606         if (ipr_cmd == NULL)
6607                 return AC_ERR_SYSTEM;
6608 
6609         qc->lldd_task = NULL;
6610         spin_lock(&ipr_cmd->hrrq->_lock);
6611         if (unlikely(!ipr_cmd->hrrq->allow_cmds ||
6612                         ipr_cmd->hrrq->ioa_is_dead)) {
6613                 list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6614                 spin_unlock(&ipr_cmd->hrrq->_lock);
6615                 return AC_ERR_SYSTEM;
6616         }
6617 
6618         ipr_init_ipr_cmnd(ipr_cmd, ipr_lock_and_done);
6619         ioarcb = &ipr_cmd->ioarcb;
6620 
6621         if (ioa_cfg->sis64) {
6622                 regs = &ipr_cmd->i.ata_ioadl.regs;
6623                 ioarcb->add_cmd_parms_offset = cpu_to_be16(sizeof(*ioarcb));
6624         } else
6625                 regs = &ioarcb->u.add_data.u.regs;
6626 
6627         memset(regs, 0, sizeof(*regs));
6628         ioarcb->add_cmd_parms_len = cpu_to_be16(sizeof(*regs));
6629 
6630         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
6631         ipr_cmd->qc = qc;
6632         ipr_cmd->done = ipr_sata_done;
6633         ipr_cmd->ioarcb.res_handle = res->res_handle;
6634         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_ATA_PASSTHRU;
6635         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_LINK_DESC;
6636         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
6637         ipr_cmd->dma_use_sg = qc->n_elem;
6638 
6639         if (ioa_cfg->sis64)
6640                 ipr_build_ata_ioadl64(ipr_cmd, qc);
6641         else
6642                 ipr_build_ata_ioadl(ipr_cmd, qc);
6643 
6644         regs->flags |= IPR_ATA_FLAG_STATUS_ON_GOOD_COMPLETION;
6645         ipr_copy_sata_tf(regs, &qc->tf);
6646         memcpy(ioarcb->cmd_pkt.cdb, qc->cdb, IPR_MAX_CDB_LEN);
6647         ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_GET_RES_PHYS_LOC(res));
6648 
6649         switch (qc->tf.protocol) {
6650         case ATA_PROT_NODATA:
6651         case ATA_PROT_PIO:
6652                 break;
6653 
6654         case ATA_PROT_DMA:
6655                 regs->flags |= IPR_ATA_FLAG_XFER_TYPE_DMA;
6656                 break;
6657 
6658         case ATAPI_PROT_PIO:
6659         case ATAPI_PROT_NODATA:
6660                 regs->flags |= IPR_ATA_FLAG_PACKET_CMD;
6661                 break;
6662 
6663         case ATAPI_PROT_DMA:
6664                 regs->flags |= IPR_ATA_FLAG_PACKET_CMD;
6665                 regs->flags |= IPR_ATA_FLAG_XFER_TYPE_DMA;
6666                 break;
6667 
6668         default:
6669                 WARN_ON(1);
6670                 spin_unlock(&ipr_cmd->hrrq->_lock);
6671                 return AC_ERR_INVALID;
6672         }
6673 
6674         ipr_send_command(ipr_cmd);
6675         spin_unlock(&ipr_cmd->hrrq->_lock);
6676 
6677         return 0;
6678 }
6679 
6680 /**
6681  * ipr_qc_fill_rtf - Read result TF
6682  * @qc: ATA queued command
6683  *
6684  * Return value:
6685  *      true
6686  **/
6687 static bool ipr_qc_fill_rtf(struct ata_queued_cmd *qc)
6688 {
6689         struct ipr_sata_port *sata_port = qc->ap->private_data;
6690         struct ipr_ioasa_gata *g = &sata_port->ioasa;
6691         struct ata_taskfile *tf = &qc->result_tf;
6692 
6693         tf->feature = g->error;
6694         tf->nsect = g->nsect;
6695         tf->lbal = g->lbal;
6696         tf->lbam = g->lbam;
6697         tf->lbah = g->lbah;
6698         tf->device = g->device;
6699         tf->command = g->status;
6700         tf->hob_nsect = g->hob_nsect;
6701         tf->hob_lbal = g->hob_lbal;
6702         tf->hob_lbam = g->hob_lbam;
6703         tf->hob_lbah = g->hob_lbah;
6704 
6705         return true;
6706 }
6707 
6708 static struct ata_port_operations ipr_sata_ops = {
6709         .phy_reset = ipr_ata_phy_reset,
6710         .hardreset = ipr_sata_reset,
6711         .post_internal_cmd = ipr_ata_post_internal,
6712         .qc_prep = ata_noop_qc_prep,
6713         .qc_defer = ipr_qc_defer,
6714         .qc_issue = ipr_qc_issue,
6715         .qc_fill_rtf = ipr_qc_fill_rtf,
6716         .port_start = ata_sas_port_start,
6717         .port_stop = ata_sas_port_stop
6718 };
6719 
6720 static struct ata_port_info sata_port_info = {
6721         .flags          = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA,
6722         .pio_mask       = ATA_PIO4_ONLY,
6723         .mwdma_mask     = ATA_MWDMA2,
6724         .udma_mask      = ATA_UDMA6,
6725         .port_ops       = &ipr_sata_ops
6726 };
6727 
6728 #ifdef CONFIG_PPC_PSERIES
6729 static const u16 ipr_blocked_processors[] = {
6730         PVR_NORTHSTAR,
6731         PVR_PULSAR,
6732         PVR_POWER4,
6733         PVR_ICESTAR,
6734         PVR_SSTAR,
6735         PVR_POWER4p,
6736         PVR_630,
6737         PVR_630p
6738 };
6739 
6740 /**
6741  * ipr_invalid_adapter - Determine if this adapter is supported on this hardware
6742  * @ioa_cfg:    ioa cfg struct
6743  *
6744  * Adapters that use Gemstone revision < 3.1 do not work reliably on
6745  * certain pSeries hardware. This function determines if the given
6746  * adapter is in one of these confgurations or not.
6747  *
6748  * Return value:
6749  *      1 if adapter is not supported / 0 if adapter is supported
6750  **/
6751 static int ipr_invalid_adapter(struct ipr_ioa_cfg *ioa_cfg)
6752 {
6753         int i;
6754 
6755         if ((ioa_cfg->type == 0x5702) && (ioa_cfg->pdev->revision < 4)) {
6756                 for (i = 0; i < ARRAY_SIZE(ipr_blocked_processors); i++) {
6757                         if (pvr_version_is(ipr_blocked_processors[i]))
6758                                 return 1;
6759                 }
6760         }
6761         return 0;
6762 }
6763 #else
6764 #define ipr_invalid_adapter(ioa_cfg) 0
6765 #endif
6766 
6767 /**
6768  * ipr_ioa_bringdown_done - IOA bring down completion.
6769  * @ipr_cmd:    ipr command struct
6770  *
6771  * This function processes the completion of an adapter bring down.
6772  * It wakes any reset sleepers.
6773  *
6774  * Return value:
6775  *      IPR_RC_JOB_RETURN
6776  **/
6777 static int ipr_ioa_bringdown_done(struct ipr_cmnd *ipr_cmd)
6778 {
6779         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6780         int i;
6781 
6782         ENTER;
6783         if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].removing_ioa) {
6784                 ipr_trace;
6785                 spin_unlock_irq(ioa_cfg->host->host_lock);
6786                 scsi_unblock_requests(ioa_cfg->host);
6787                 spin_lock_irq(ioa_cfg->host->host_lock);
6788         }
6789 
6790         ioa_cfg->in_reset_reload = 0;
6791         ioa_cfg->reset_retries = 0;
6792         for (i = 0; i < ioa_cfg->hrrq_num; i++) {
6793                 spin_lock(&ioa_cfg->hrrq[i]._lock);
6794                 ioa_cfg->hrrq[i].ioa_is_dead = 1;
6795                 spin_unlock(&ioa_cfg->hrrq[i]._lock);
6796         }
6797         wmb();
6798 
6799         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6800         wake_up_all(&ioa_cfg->reset_wait_q);
6801         LEAVE;
6802 
6803         return IPR_RC_JOB_RETURN;
6804 }
6805 
6806 /**
6807  * ipr_ioa_reset_done - IOA reset completion.
6808  * @ipr_cmd:    ipr command struct
6809  *
6810  * This function processes the completion of an adapter reset.
6811  * It schedules any necessary mid-layer add/removes and
6812  * wakes any reset sleepers.
6813  *
6814  * Return value:
6815  *      IPR_RC_JOB_RETURN
6816  **/
6817 static int ipr_ioa_reset_done(struct ipr_cmnd *ipr_cmd)
6818 {
6819         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6820         struct ipr_resource_entry *res;
6821         struct ipr_hostrcb *hostrcb, *temp;
6822         int i = 0, j;
6823 
6824         ENTER;
6825         ioa_cfg->in_reset_reload = 0;
6826         for (j = 0; j < ioa_cfg->hrrq_num; j++) {
6827                 spin_lock(&ioa_cfg->hrrq[j]._lock);
6828                 ioa_cfg->hrrq[j].allow_cmds = 1;
6829                 spin_unlock(&ioa_cfg->hrrq[j]._lock);
6830         }
6831         wmb();
6832         ioa_cfg->reset_cmd = NULL;
6833         ioa_cfg->doorbell |= IPR_RUNTIME_RESET;
6834 
6835         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
6836                 if (ioa_cfg->allow_ml_add_del && (res->add_to_ml || res->del_from_ml)) {
6837                         ipr_trace;
6838                         break;
6839                 }
6840         }
6841         schedule_work(&ioa_cfg->work_q);
6842 
6843         list_for_each_entry_safe(hostrcb, temp, &ioa_cfg->hostrcb_free_q, queue) {
6844                 list_del(&hostrcb->queue);
6845                 if (i++ < IPR_NUM_LOG_HCAMS)
6846                         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
6847                 else
6848                         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
6849         }
6850 
6851         scsi_report_bus_reset(ioa_cfg->host, IPR_VSET_BUS);
6852         dev_info(&ioa_cfg->pdev->dev, "IOA initialized.\n");
6853 
6854         ioa_cfg->reset_retries = 0;
6855         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6856         wake_up_all(&ioa_cfg->reset_wait_q);
6857 
6858         spin_unlock(ioa_cfg->host->host_lock);
6859         scsi_unblock_requests(ioa_cfg->host);
6860         spin_lock(ioa_cfg->host->host_lock);
6861 
6862         if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds)
6863                 scsi_block_requests(ioa_cfg->host);
6864 
6865         LEAVE;
6866         return IPR_RC_JOB_RETURN;
6867 }
6868 
6869 /**
6870  * ipr_set_sup_dev_dflt - Initialize a Set Supported Device buffer
6871  * @supported_dev:      supported device struct
6872  * @vpids:                      vendor product id struct
6873  *
6874  * Return value:
6875  *      none
6876  **/
6877 static void ipr_set_sup_dev_dflt(struct ipr_supported_device *supported_dev,
6878                                  struct ipr_std_inq_vpids *vpids)
6879 {
6880         memset(supported_dev, 0, sizeof(struct ipr_supported_device));
6881         memcpy(&supported_dev->vpids, vpids, sizeof(struct ipr_std_inq_vpids));
6882         supported_dev->num_records = 1;
6883         supported_dev->data_length =
6884                 cpu_to_be16(sizeof(struct ipr_supported_device));
6885         supported_dev->reserved = 0;
6886 }
6887 
6888 /**
6889  * ipr_set_supported_devs - Send Set Supported Devices for a device
6890  * @ipr_cmd:    ipr command struct
6891  *
6892  * This function sends a Set Supported Devices to the adapter
6893  *
6894  * Return value:
6895  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
6896  **/
6897 static int ipr_set_supported_devs(struct ipr_cmnd *ipr_cmd)
6898 {
6899         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6900         struct ipr_supported_device *supp_dev = &ioa_cfg->vpd_cbs->supp_dev;
6901         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
6902         struct ipr_resource_entry *res = ipr_cmd->u.res;
6903 
6904         ipr_cmd->job_step = ipr_ioa_reset_done;
6905 
6906         list_for_each_entry_continue(res, &ioa_cfg->used_res_q, queue) {
6907                 if (!ipr_is_scsi_disk(res))
6908                         continue;
6909 
6910                 ipr_cmd->u.res = res;
6911                 ipr_set_sup_dev_dflt(supp_dev, &res->std_inq_data.vpids);
6912 
6913                 ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
6914                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
6915                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
6916 
6917                 ioarcb->cmd_pkt.cdb[0] = IPR_SET_SUPPORTED_DEVICES;
6918                 ioarcb->cmd_pkt.cdb[1] = IPR_SET_ALL_SUPPORTED_DEVICES;
6919                 ioarcb->cmd_pkt.cdb[7] = (sizeof(struct ipr_supported_device) >> 8) & 0xff;
6920                 ioarcb->cmd_pkt.cdb[8] = sizeof(struct ipr_supported_device) & 0xff;
6921 
6922                 ipr_init_ioadl(ipr_cmd,
6923                                ioa_cfg->vpd_cbs_dma +
6924                                  offsetof(struct ipr_misc_cbs, supp_dev),
6925                                sizeof(struct ipr_supported_device),
6926                                IPR_IOADL_FLAGS_WRITE_LAST);
6927 
6928                 ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout,
6929                            IPR_SET_SUP_DEVICE_TIMEOUT);
6930 
6931                 if (!ioa_cfg->sis64)
6932                         ipr_cmd->job_step = ipr_set_supported_devs;
6933                 LEAVE;
6934                 return IPR_RC_JOB_RETURN;
6935         }
6936 
6937         LEAVE;
6938         return IPR_RC_JOB_CONTINUE;
6939 }
6940 
6941 /**
6942  * ipr_get_mode_page - Locate specified mode page
6943  * @mode_pages: mode page buffer
6944  * @page_code:  page code to find
6945  * @len:                minimum required length for mode page
6946  *
6947  * Return value:
6948  *      pointer to mode page / NULL on failure
6949  **/
6950 static void *ipr_get_mode_page(struct ipr_mode_pages *mode_pages,
6951                                u32 page_code, u32 len)
6952 {
6953         struct ipr_mode_page_hdr *mode_hdr;
6954         u32 page_length;
6955         u32 length;
6956 
6957         if (!mode_pages || (mode_pages->hdr.length == 0))
6958                 return NULL;
6959 
6960         length = (mode_pages->hdr.length + 1) - 4 - mode_pages->hdr.block_desc_len;
6961         mode_hdr = (struct ipr_mode_page_hdr *)
6962                 (mode_pages->data + mode_pages->hdr.block_desc_len);
6963 
6964         while (length) {
6965                 if (IPR_GET_MODE_PAGE_CODE(mode_hdr) == page_code) {
6966                         if (mode_hdr->page_length >= (len - sizeof(struct ipr_mode_page_hdr)))
6967                                 return mode_hdr;
6968                         break;
6969                 } else {
6970                         page_length = (sizeof(struct ipr_mode_page_hdr) +
6971                                        mode_hdr->page_length);
6972                         length -= page_length;
6973                         mode_hdr = (struct ipr_mode_page_hdr *)
6974                                 ((unsigned long)mode_hdr + page_length);
6975                 }
6976         }
6977         return NULL;
6978 }
6979 
6980 /**
6981  * ipr_check_term_power - Check for term power errors
6982  * @ioa_cfg:    ioa config struct
6983  * @mode_pages: IOAFP mode pages buffer
6984  *
6985  * Check the IOAFP's mode page 28 for term power errors
6986  *
6987  * Return value:
6988  *      nothing
6989  **/
6990 static void ipr_check_term_power(struct ipr_ioa_cfg *ioa_cfg,
6991                                  struct ipr_mode_pages *mode_pages)
6992 {
6993         int i;
6994         int entry_length;
6995         struct ipr_dev_bus_entry *bus;
6996         struct ipr_mode_page28 *mode_page;
6997 
6998         mode_page = ipr_get_mode_page(mode_pages, 0x28,
6999                                       sizeof(struct ipr_mode_page28));
7000 
7001         entry_length = mode_page->entry_length;
7002 
7003         bus = mode_page->bus;
7004 
7005         for (i = 0; i < mode_page->num_entries; i++) {
7006                 if (bus->flags & IPR_SCSI_ATTR_NO_TERM_PWR) {
7007                         dev_err(&ioa_cfg->pdev->dev,
7008                                 "Term power is absent on scsi bus %d\n",
7009                                 bus->res_addr.bus);
7010                 }
7011 
7012                 bus = (struct ipr_dev_bus_entry *)((char *)bus + entry_length);
7013         }
7014 }
7015 
7016 /**
7017  * ipr_scsi_bus_speed_limit - Limit the SCSI speed based on SES table
7018  * @ioa_cfg:    ioa config struct
7019  *
7020  * Looks through the config table checking for SES devices. If
7021  * the SES device is in the SES table indicating a maximum SCSI
7022  * bus speed, the speed is limited for the bus.
7023  *
7024  * Return value:
7025  *      none
7026  **/
7027 static void ipr_scsi_bus_speed_limit(struct ipr_ioa_cfg *ioa_cfg)
7028 {
7029         u32 max_xfer_rate;
7030         int i;
7031 
7032         for (i = 0; i < IPR_MAX_NUM_BUSES; i++) {
7033                 max_xfer_rate = ipr_get_max_scsi_speed(ioa_cfg, i,
7034                                                        ioa_cfg->bus_attr[i].bus_width);
7035 
7036                 if (max_xfer_rate < ioa_cfg->bus_attr[i].max_xfer_rate)
7037                         ioa_cfg->bus_attr[i].max_xfer_rate = max_xfer_rate;
7038         }
7039 }
7040 
7041 /**
7042  * ipr_modify_ioafp_mode_page_28 - Modify IOAFP Mode Page 28
7043  * @ioa_cfg:    ioa config struct
7044  * @mode_pages: mode page 28 buffer
7045  *
7046  * Updates mode page 28 based on driver configuration
7047  *
7048  * Return value:
7049  *      none
7050  **/
7051 static void ipr_modify_ioafp_mode_page_28(struct ipr_ioa_cfg *ioa_cfg,
7052                                           struct ipr_mode_pages *mode_pages)
7053 {
7054         int i, entry_length;
7055         struct ipr_dev_bus_entry *bus;
7056         struct ipr_bus_attributes *bus_attr;
7057         struct ipr_mode_page28 *mode_page;
7058 
7059         mode_page = ipr_get_mode_page(mode_pages, 0x28,
7060                                       sizeof(struct ipr_mode_page28));
7061 
7062         entry_length = mode_page->entry_length;
7063 
7064         /* Loop for each device bus entry */
7065         for (i = 0, bus = mode_page->bus;
7066              i < mode_page->num_entries;
7067              i++, bus = (struct ipr_dev_bus_entry *)((u8 *)bus + entry_length)) {
7068                 if (bus->res_addr.bus > IPR_MAX_NUM_BUSES) {
7069                         dev_err(&ioa_cfg->pdev->dev,
7070                                 "Invalid resource address reported: 0x%08X\n",
7071                                 IPR_GET_PHYS_LOC(bus->res_addr));
7072                         continue;
7073                 }
7074 
7075                 bus_attr = &ioa_cfg->bus_attr[i];
7076                 bus->extended_reset_delay = IPR_EXTENDED_RESET_DELAY;
7077                 bus->bus_width = bus_attr->bus_width;
7078                 bus->max_xfer_rate = cpu_to_be32(bus_attr->max_xfer_rate);
7079                 bus->flags &= ~IPR_SCSI_ATTR_QAS_MASK;
7080                 if (bus_attr->qas_enabled)
7081                         bus->flags |= IPR_SCSI_ATTR_ENABLE_QAS;
7082                 else
7083                         bus->flags |= IPR_SCSI_ATTR_DISABLE_QAS;
7084         }
7085 }
7086 
7087 /**
7088  * ipr_build_mode_select - Build a mode select command
7089  * @ipr_cmd:    ipr command struct
7090  * @res_handle: resource handle to send command to
7091  * @parm:               Byte 2 of Mode Sense command
7092  * @dma_addr:   DMA buffer address
7093  * @xfer_len:   data transfer length
7094  *
7095  * Return value:
7096  *      none
7097  **/
7098 static void ipr_build_mode_select(struct ipr_cmnd *ipr_cmd,
7099                                   __be32 res_handle, u8 parm,
7100                                   dma_addr_t dma_addr, u8 xfer_len)
7101 {
7102         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7103 
7104         ioarcb->res_handle = res_handle;
7105         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7106         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
7107         ioarcb->cmd_pkt.cdb[0] = MODE_SELECT;
7108         ioarcb->cmd_pkt.cdb[1] = parm;
7109         ioarcb->cmd_pkt.cdb[4] = xfer_len;
7110 
7111         ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_WRITE_LAST);
7112 }
7113 
7114 /**
7115  * ipr_ioafp_mode_select_page28 - Issue Mode Select Page 28 to IOA
7116  * @ipr_cmd:    ipr command struct
7117  *
7118  * This function sets up the SCSI bus attributes and sends
7119  * a Mode Select for Page 28 to activate them.
7120  *
7121  * Return value:
7122  *      IPR_RC_JOB_RETURN
7123  **/
7124 static int ipr_ioafp_mode_select_page28(struct ipr_cmnd *ipr_cmd)
7125 {
7126         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7127         struct ipr_mode_pages *mode_pages = &ioa_cfg->vpd_cbs->mode_pages;
7128         int length;
7129 
7130         ENTER;
7131         ipr_scsi_bus_speed_limit(ioa_cfg);
7132         ipr_check_term_power(ioa_cfg, mode_pages);
7133         ipr_modify_ioafp_mode_page_28(ioa_cfg, mode_pages);
7134         length = mode_pages->hdr.length + 1;
7135         mode_pages->hdr.length = 0;
7136 
7137         ipr_build_mode_select(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE), 0x11,
7138                               ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, mode_pages),
7139                               length);
7140 
7141         ipr_cmd->job_step = ipr_set_supported_devs;
7142         ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next,
7143                                     struct ipr_resource_entry, queue);
7144         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7145 
7146         LEAVE;
7147         return IPR_RC_JOB_RETURN;
7148 }
7149 
7150 /**
7151  * ipr_build_mode_sense - Builds a mode sense command
7152  * @ipr_cmd:    ipr command struct
7153  * @res:                resource entry struct
7154  * @parm:               Byte 2 of mode sense command
7155  * @dma_addr:   DMA address of mode sense buffer
7156  * @xfer_len:   Size of DMA buffer
7157  *
7158  * Return value:
7159  *      none
7160  **/
7161 static void ipr_build_mode_sense(struct ipr_cmnd *ipr_cmd,
7162                                  __be32 res_handle,
7163                                  u8 parm, dma_addr_t dma_addr, u8 xfer_len)
7164 {
7165         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7166 
7167         ioarcb->res_handle = res_handle;
7168         ioarcb->cmd_pkt.cdb[0] = MODE_SENSE;
7169         ioarcb->cmd_pkt.cdb[2] = parm;
7170         ioarcb->cmd_pkt.cdb[4] = xfer_len;
7171         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7172 
7173         ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_READ_LAST);
7174 }
7175 
7176 /**
7177  * ipr_reset_cmd_failed - Handle failure of IOA reset command
7178  * @ipr_cmd:    ipr command struct
7179  *
7180  * This function handles the failure of an IOA bringup command.
7181  *
7182  * Return value:
7183  *      IPR_RC_JOB_RETURN
7184  **/
7185 static int ipr_reset_cmd_failed(struct ipr_cmnd *ipr_cmd)
7186 {
7187         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7188         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7189 
7190         dev_err(&ioa_cfg->pdev->dev,
7191                 "0x%02X failed with IOASC: 0x%08X\n",
7192                 ipr_cmd->ioarcb.cmd_pkt.cdb[0], ioasc);
7193 
7194         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
7195         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
7196         return IPR_RC_JOB_RETURN;
7197 }
7198 
7199 /**
7200  * ipr_reset_mode_sense_failed - Handle failure of IOAFP mode sense
7201  * @ipr_cmd:    ipr command struct
7202  *
7203  * This function handles the failure of a Mode Sense to the IOAFP.
7204  * Some adapters do not handle all mode pages.
7205  *
7206  * Return value:
7207  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7208  **/
7209 static int ipr_reset_mode_sense_failed(struct ipr_cmnd *ipr_cmd)
7210 {
7211         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7212         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7213 
7214         if (ioasc == IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT) {
7215                 ipr_cmd->job_step = ipr_set_supported_devs;
7216                 ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next,
7217                                             struct ipr_resource_entry, queue);
7218                 return IPR_RC_JOB_CONTINUE;
7219         }
7220 
7221         return ipr_reset_cmd_failed(ipr_cmd);
7222 }
7223 
7224 /**
7225  * ipr_ioafp_mode_sense_page28 - Issue Mode Sense Page 28 to IOA
7226  * @ipr_cmd:    ipr command struct
7227  *
7228  * This function send a Page 28 mode sense to the IOA to
7229  * retrieve SCSI bus attributes.
7230  *
7231  * Return value:
7232  *      IPR_RC_JOB_RETURN
7233  **/
7234 static int ipr_ioafp_mode_sense_page28(struct ipr_cmnd *ipr_cmd)
7235 {
7236         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7237 
7238         ENTER;
7239         ipr_build_mode_sense(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE),
7240                              0x28, ioa_cfg->vpd_cbs_dma +
7241                              offsetof(struct ipr_misc_cbs, mode_pages),
7242                              sizeof(struct ipr_mode_pages));
7243 
7244         ipr_cmd->job_step = ipr_ioafp_mode_select_page28;
7245         ipr_cmd->job_step_failed = ipr_reset_mode_sense_failed;
7246 
7247         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7248 
7249         LEAVE;
7250         return IPR_RC_JOB_RETURN;
7251 }
7252 
7253 /**
7254  * ipr_ioafp_mode_select_page24 - Issue Mode Select to IOA
7255  * @ipr_cmd:    ipr command struct
7256  *
7257  * This function enables dual IOA RAID support if possible.
7258  *
7259  * Return value:
7260  *      IPR_RC_JOB_RETURN
7261  **/
7262 static int ipr_ioafp_mode_select_page24(struct ipr_cmnd *ipr_cmd)
7263 {
7264         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7265         struct ipr_mode_pages *mode_pages = &ioa_cfg->vpd_cbs->mode_pages;
7266         struct ipr_mode_page24 *mode_page;
7267         int length;
7268 
7269         ENTER;
7270         mode_page = ipr_get_mode_page(mode_pages, 0x24,
7271                                       sizeof(struct ipr_mode_page24));
7272 
7273         if (mode_page)
7274                 mode_page->flags |= IPR_ENABLE_DUAL_IOA_AF;
7275 
7276         length = mode_pages->hdr.length + 1;
7277         mode_pages->hdr.length = 0;
7278 
7279         ipr_build_mode_select(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE), 0x11,
7280                               ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, mode_pages),
7281                               length);
7282 
7283         ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7284         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7285 
7286         LEAVE;
7287         return IPR_RC_JOB_RETURN;
7288 }
7289 
7290 /**
7291  * ipr_reset_mode_sense_page24_failed - Handle failure of IOAFP mode sense
7292  * @ipr_cmd:    ipr command struct
7293  *
7294  * This function handles the failure of a Mode Sense to the IOAFP.
7295  * Some adapters do not handle all mode pages.
7296  *
7297  * Return value:
7298  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7299  **/
7300 static int ipr_reset_mode_sense_page24_failed(struct ipr_cmnd *ipr_cmd)
7301 {
7302         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7303 
7304         if (ioasc == IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT) {
7305                 ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7306                 return IPR_RC_JOB_CONTINUE;
7307         }
7308 
7309         return ipr_reset_cmd_failed(ipr_cmd);
7310 }
7311 
7312 /**
7313  * ipr_ioafp_mode_sense_page24 - Issue Page 24 Mode Sense to IOA
7314  * @ipr_cmd:    ipr command struct
7315  *
7316  * This function send a mode sense to the IOA to retrieve
7317  * the IOA Advanced Function Control mode page.
7318  *
7319  * Return value:
7320  *      IPR_RC_JOB_RETURN
7321  **/
7322 static int ipr_ioafp_mode_sense_page24(struct ipr_cmnd *ipr_cmd)
7323 {
7324         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7325 
7326         ENTER;
7327         ipr_build_mode_sense(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE),
7328                              0x24, ioa_cfg->vpd_cbs_dma +
7329                              offsetof(struct ipr_misc_cbs, mode_pages),
7330                              sizeof(struct ipr_mode_pages));
7331 
7332         ipr_cmd->job_step = ipr_ioafp_mode_select_page24;
7333         ipr_cmd->job_step_failed = ipr_reset_mode_sense_page24_failed;
7334 
7335         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7336 
7337         LEAVE;
7338         return IPR_RC_JOB_RETURN;
7339 }
7340 
7341 /**
7342  * ipr_init_res_table - Initialize the resource table
7343  * @ipr_cmd:    ipr command struct
7344  *
7345  * This function looks through the existing resource table, comparing
7346  * it with the config table. This function will take care of old/new
7347  * devices and schedule adding/removing them from the mid-layer
7348  * as appropriate.
7349  *
7350  * Return value:
7351  *      IPR_RC_JOB_CONTINUE
7352  **/
7353 static int ipr_init_res_table(struct ipr_cmnd *ipr_cmd)
7354 {
7355         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7356         struct ipr_resource_entry *res, *temp;
7357         struct ipr_config_table_entry_wrapper cfgtew;
7358         int entries, found, flag, i;
7359         LIST_HEAD(old_res);
7360 
7361         ENTER;
7362         if (ioa_cfg->sis64)
7363                 flag = ioa_cfg->u.cfg_table64->hdr64.flags;
7364         else
7365                 flag = ioa_cfg->u.cfg_table->hdr.flags;
7366 
7367         if (flag & IPR_UCODE_DOWNLOAD_REQ)
7368                 dev_err(&ioa_cfg->pdev->dev, "Microcode download required\n");
7369 
7370         list_for_each_entry_safe(res, temp, &ioa_cfg->used_res_q, queue)
7371                 list_move_tail(&res->queue, &old_res);
7372 
7373         if (ioa_cfg->sis64)
7374                 entries = be16_to_cpu(ioa_cfg->u.cfg_table64->hdr64.num_entries);
7375         else
7376                 entries = ioa_cfg->u.cfg_table->hdr.num_entries;
7377 
7378         for (i = 0; i < entries; i++) {
7379                 if (ioa_cfg->sis64)
7380                         cfgtew.u.cfgte64 = &ioa_cfg->u.cfg_table64->dev[i];
7381                 else
7382                         cfgtew.u.cfgte = &ioa_cfg->u.cfg_table->dev[i];
7383                 found = 0;
7384 
7385                 list_for_each_entry_safe(res, temp, &old_res, queue) {
7386                         if (ipr_is_same_device(res, &cfgtew)) {
7387                                 list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7388                                 found = 1;
7389                                 break;
7390                         }
7391                 }
7392 
7393                 if (!found) {
7394                         if (list_empty(&ioa_cfg->free_res_q)) {
7395                                 dev_err(&ioa_cfg->pdev->dev, "Too many devices attached\n");
7396                                 break;
7397                         }
7398 
7399                         found = 1;
7400                         res = list_entry(ioa_cfg->free_res_q.next,
7401                                          struct ipr_resource_entry, queue);
7402                         list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7403                         ipr_init_res_entry(res, &cfgtew);
7404                         res->add_to_ml = 1;
7405                 } else if (res->sdev && (ipr_is_vset_device(res) || ipr_is_scsi_disk(res)))
7406                         res->sdev->allow_restart = 1;
7407 
7408                 if (found)
7409                         ipr_update_res_entry(res, &cfgtew);
7410         }
7411 
7412         list_for_each_entry_safe(res, temp, &old_res, queue) {
7413                 if (res->sdev) {
7414                         res->del_from_ml = 1;
7415                         res->res_handle = IPR_INVALID_RES_HANDLE;
7416                         list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7417                 }
7418         }
7419 
7420         list_for_each_entry_safe(res, temp, &old_res, queue) {
7421                 ipr_clear_res_target(res);
7422                 list_move_tail(&res->queue, &ioa_cfg->free_res_q);
7423         }
7424 
7425         if (ioa_cfg->dual_raid && ipr_dual_ioa_raid)
7426                 ipr_cmd->job_step = ipr_ioafp_mode_sense_page24;
7427         else
7428                 ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7429 
7430         LEAVE;
7431         return IPR_RC_JOB_CONTINUE;
7432 }
7433 
7434 /**
7435  * ipr_ioafp_query_ioa_cfg - Send a Query IOA Config to the adapter.
7436  * @ipr_cmd:    ipr command struct
7437  *
7438  * This function sends a Query IOA Configuration command
7439  * to the adapter to retrieve the IOA configuration table.
7440  *
7441  * Return value:
7442  *      IPR_RC_JOB_RETURN
7443  **/
7444 static int ipr_ioafp_query_ioa_cfg(struct ipr_cmnd *ipr_cmd)
7445 {
7446         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7447         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7448         struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
7449         struct ipr_inquiry_cap *cap = &ioa_cfg->vpd_cbs->cap;
7450 
7451         ENTER;
7452         if (cap->cap & IPR_CAP_DUAL_IOA_RAID)
7453                 ioa_cfg->dual_raid = 1;
7454         dev_info(&ioa_cfg->pdev->dev, "Adapter firmware version: %02X%02X%02X%02X\n",
7455                  ucode_vpd->major_release, ucode_vpd->card_type,
7456                  ucode_vpd->minor_release[0], ucode_vpd->minor_release[1]);
7457         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
7458         ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7459 
7460         ioarcb->cmd_pkt.cdb[0] = IPR_QUERY_IOA_CONFIG;
7461         ioarcb->cmd_pkt.cdb[6] = (ioa_cfg->cfg_table_size >> 16) & 0xff;
7462         ioarcb->cmd_pkt.cdb[7] = (ioa_cfg->cfg_table_size >> 8) & 0xff;
7463         ioarcb->cmd_pkt.cdb[8] = ioa_cfg->cfg_table_size & 0xff;
7464 
7465         ipr_init_ioadl(ipr_cmd, ioa_cfg->cfg_table_dma, ioa_cfg->cfg_table_size,
7466                        IPR_IOADL_FLAGS_READ_LAST);
7467 
7468         ipr_cmd->job_step = ipr_init_res_table;
7469 
7470         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7471 
7472         LEAVE;
7473         return IPR_RC_JOB_RETURN;
7474 }
7475 
7476 /**
7477  * ipr_ioafp_inquiry - Send an Inquiry to the adapter.
7478  * @ipr_cmd:    ipr command struct
7479  *
7480  * This utility function sends an inquiry to the adapter.
7481  *
7482  * Return value:
7483  *      none
7484  **/
7485 static void ipr_ioafp_inquiry(struct ipr_cmnd *ipr_cmd, u8 flags, u8 page,
7486                               dma_addr_t dma_addr, u8 xfer_len)
7487 {
7488         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7489 
7490         ENTER;
7491         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7492         ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7493 
7494         ioarcb->cmd_pkt.cdb[0] = INQUIRY;
7495         ioarcb->cmd_pkt.cdb[1] = flags;
7496         ioarcb->cmd_pkt.cdb[2] = page;
7497         ioarcb->cmd_pkt.cdb[4] = xfer_len;
7498 
7499         ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_READ_LAST);
7500 
7501         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7502         LEAVE;
7503 }
7504 
7505 /**
7506  * ipr_inquiry_page_supported - Is the given inquiry page supported
7507  * @page0:              inquiry page 0 buffer
7508  * @page:               page code.
7509  *
7510  * This function determines if the specified inquiry page is supported.
7511  *
7512  * Return value:
7513  *      1 if page is supported / 0 if not
7514  **/
7515 static int ipr_inquiry_page_supported(struct ipr_inquiry_page0 *page0, u8 page)
7516 {
7517         int i;
7518 
7519         for (i = 0; i < min_t(u8, page0->len, IPR_INQUIRY_PAGE0_ENTRIES); i++)
7520                 if (page0->page[i] == page)
7521                         return 1;
7522 
7523         return 0;
7524 }
7525 
7526 /**
7527  * ipr_ioafp_cap_inquiry - Send a Page 0xD0 Inquiry to the adapter.
7528  * @ipr_cmd:    ipr command struct
7529  *
7530  * This function sends a Page 0xD0 inquiry to the adapter
7531  * to retrieve adapter capabilities.
7532  *
7533  * Return value:
7534  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7535  **/
7536 static int ipr_ioafp_cap_inquiry(struct ipr_cmnd *ipr_cmd)
7537 {
7538         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7539         struct ipr_inquiry_page0 *page0 = &ioa_cfg->vpd_cbs->page0_data;
7540         struct ipr_inquiry_cap *cap = &ioa_cfg->vpd_cbs->cap;
7541 
7542         ENTER;
7543         ipr_cmd->job_step = ipr_ioafp_query_ioa_cfg;
7544         memset(cap, 0, sizeof(*cap));
7545 
7546         if (ipr_inquiry_page_supported(page0, 0xD0)) {
7547                 ipr_ioafp_inquiry(ipr_cmd, 1, 0xD0,
7548                                   ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, cap),
7549                                   sizeof(struct ipr_inquiry_cap));
7550                 return IPR_RC_JOB_RETURN;
7551         }
7552 
7553         LEAVE;
7554         return IPR_RC_JOB_CONTINUE;
7555 }
7556 
7557 /**
7558  * ipr_ioafp_page3_inquiry - Send a Page 3 Inquiry to the adapter.
7559  * @ipr_cmd:    ipr command struct
7560  *
7561  * This function sends a Page 3 inquiry to the adapter
7562  * to retrieve software VPD information.
7563  *
7564  * Return value:
7565  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7566  **/
7567 static int ipr_ioafp_page3_inquiry(struct ipr_cmnd *ipr_cmd)
7568 {
7569         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7570 
7571         ENTER;
7572 
7573         ipr_cmd->job_step = ipr_ioafp_cap_inquiry;
7574 
7575         ipr_ioafp_inquiry(ipr_cmd, 1, 3,
7576                           ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page3_data),
7577                           sizeof(struct ipr_inquiry_page3));
7578 
7579         LEAVE;
7580         return IPR_RC_JOB_RETURN;
7581 }
7582 
7583 /**
7584  * ipr_ioafp_page0_inquiry - Send a Page 0 Inquiry to the adapter.
7585  * @ipr_cmd:    ipr command struct
7586  *
7587  * This function sends a Page 0 inquiry to the adapter
7588  * to retrieve supported inquiry pages.
7589  *
7590  * Return value:
7591  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7592  **/
7593 static int ipr_ioafp_page0_inquiry(struct ipr_cmnd *ipr_cmd)
7594 {
7595         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7596         char type[5];
7597 
7598         ENTER;
7599 
7600         /* Grab the type out of the VPD and store it away */
7601         memcpy(type, ioa_cfg->vpd_cbs->ioa_vpd.std_inq_data.vpids.product_id, 4);
7602         type[4] = '\0';
7603         ioa_cfg->type = simple_strtoul((char *)type, NULL, 16);
7604 
7605         ipr_cmd->job_step = ipr_ioafp_page3_inquiry;
7606 
7607         ipr_ioafp_inquiry(ipr_cmd, 1, 0,
7608                           ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page0_data),
7609                           sizeof(struct ipr_inquiry_page0));
7610 
7611         LEAVE;
7612         return IPR_RC_JOB_RETURN;
7613 }
7614 
7615 /**
7616  * ipr_ioafp_std_inquiry - Send a Standard Inquiry to the adapter.
7617  * @ipr_cmd:    ipr command struct
7618  *
7619  * This function sends a standard inquiry to the adapter.
7620  *
7621  * Return value:
7622  *      IPR_RC_JOB_RETURN
7623  **/
7624 static int ipr_ioafp_std_inquiry(struct ipr_cmnd *ipr_cmd)
7625 {
7626         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7627 
7628         ENTER;
7629         ipr_cmd->job_step = ipr_ioafp_page0_inquiry;
7630 
7631         ipr_ioafp_inquiry(ipr_cmd, 0, 0,
7632                           ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, ioa_vpd),
7633                           sizeof(struct ipr_ioa_vpd));
7634 
7635         LEAVE;
7636         return IPR_RC_JOB_RETURN;
7637 }
7638 
7639 /**
7640  * ipr_ioafp_identify_hrrq - Send Identify Host RRQ.
7641  * @ipr_cmd:    ipr command struct
7642  *
7643  * This function send an Identify Host Request Response Queue
7644  * command to establish the HRRQ with the adapter.
7645  *
7646  * Return value:
7647  *      IPR_RC_JOB_RETURN
7648  **/
7649 static int ipr_ioafp_identify_hrrq(struct ipr_cmnd *ipr_cmd)
7650 {
7651         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7652         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7653         struct ipr_hrr_queue *hrrq;
7654 
7655         ENTER;
7656         ipr_cmd->job_step = ipr_ioafp_std_inquiry;
7657         dev_info(&ioa_cfg->pdev->dev, "Starting IOA initialization sequence.\n");
7658 
7659         if (ioa_cfg->identify_hrrq_index < ioa_cfg->hrrq_num) {
7660                 hrrq = &ioa_cfg->hrrq[ioa_cfg->identify_hrrq_index];
7661 
7662                 ioarcb->cmd_pkt.cdb[0] = IPR_ID_HOST_RR_Q;
7663                 ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7664 
7665                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
7666                 if (ioa_cfg->sis64)
7667                         ioarcb->cmd_pkt.cdb[1] = 0x1;
7668 
7669                 if (ioa_cfg->nvectors == 1)
7670                         ioarcb->cmd_pkt.cdb[1] &= ~IPR_ID_HRRQ_SELE_ENABLE;
7671                 else
7672                         ioarcb->cmd_pkt.cdb[1] |= IPR_ID_HRRQ_SELE_ENABLE;
7673 
7674                 ioarcb->cmd_pkt.cdb[2] =
7675                         ((u64) hrrq->host_rrq_dma >> 24) & 0xff;
7676                 ioarcb->cmd_pkt.cdb[3] =
7677                         ((u64) hrrq->host_rrq_dma >> 16) & 0xff;
7678                 ioarcb->cmd_pkt.cdb[4] =
7679                         ((u64) hrrq->host_rrq_dma >> 8) & 0xff;
7680                 ioarcb->cmd_pkt.cdb[5] =
7681                         ((u64) hrrq->host_rrq_dma) & 0xff;
7682                 ioarcb->cmd_pkt.cdb[7] =
7683                         ((sizeof(u32) * hrrq->size) >> 8) & 0xff;
7684                 ioarcb->cmd_pkt.cdb[8] =
7685                         (sizeof(u32) * hrrq->size) & 0xff;
7686 
7687                 if (ioarcb->cmd_pkt.cdb[1] & IPR_ID_HRRQ_SELE_ENABLE)
7688                         ioarcb->cmd_pkt.cdb[9] =
7689                                         ioa_cfg->identify_hrrq_index;
7690 
7691                 if (ioa_cfg->sis64) {
7692                         ioarcb->cmd_pkt.cdb[10] =
7693                                 ((u64) hrrq->host_rrq_dma >> 56) & 0xff;
7694                         ioarcb->cmd_pkt.cdb[11] =
7695                                 ((u64) hrrq->host_rrq_dma >> 48) & 0xff;
7696                         ioarcb->cmd_pkt.cdb[12] =
7697                                 ((u64) hrrq->host_rrq_dma >> 40) & 0xff;
7698                         ioarcb->cmd_pkt.cdb[13] =
7699                                 ((u64) hrrq->host_rrq_dma >> 32) & 0xff;
7700                 }
7701 
7702                 if (ioarcb->cmd_pkt.cdb[1] & IPR_ID_HRRQ_SELE_ENABLE)
7703                         ioarcb->cmd_pkt.cdb[14] =
7704                                         ioa_cfg->identify_hrrq_index;
7705 
7706                 ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout,
7707                            IPR_INTERNAL_TIMEOUT);
7708 
7709                 if (++ioa_cfg->identify_hrrq_index < ioa_cfg->hrrq_num)
7710                         ipr_cmd->job_step = ipr_ioafp_identify_hrrq;
7711 
7712                 LEAVE;
7713                 return IPR_RC_JOB_RETURN;
7714         }
7715 
7716         LEAVE;
7717         return IPR_RC_JOB_CONTINUE;
7718 }
7719 
7720 /**
7721  * ipr_reset_timer_done - Adapter reset timer function
7722  * @ipr_cmd:    ipr command struct
7723  *
7724  * Description: This function is used in adapter reset processing
7725  * for timing events. If the reset_cmd pointer in the IOA
7726  * config struct is not this adapter's we are doing nested
7727  * resets and fail_all_ops will take care of freeing the
7728  * command block.
7729  *
7730  * Return value:
7731  *      none
7732  **/
7733 static void ipr_reset_timer_done(struct ipr_cmnd *ipr_cmd)
7734 {
7735         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7736         unsigned long lock_flags = 0;
7737 
7738         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
7739 
7740         if (ioa_cfg->reset_cmd == ipr_cmd) {
7741                 list_del(&ipr_cmd->queue);
7742                 ipr_cmd->done(ipr_cmd);
7743         }
7744 
7745         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
7746 }
7747 
7748 /**
7749  * ipr_reset_start_timer - Start a timer for adapter reset job
7750  * @ipr_cmd:    ipr command struct
7751  * @timeout:    timeout value
7752  *
7753  * Description: This function is used in adapter reset processing
7754  * for timing events. If the reset_cmd pointer in the IOA
7755  * config struct is not this adapter's we are doing nested
7756  * resets and fail_all_ops will take care of freeing the
7757  * command block.
7758  *
7759  * Return value:
7760  *      none
7761  **/
7762 static void ipr_reset_start_timer(struct ipr_cmnd *ipr_cmd,
7763                                   unsigned long timeout)
7764 {
7765 
7766         ENTER;
7767         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
7768         ipr_cmd->done = ipr_reset_ioa_job;
7769 
7770         ipr_cmd->timer.data = (unsigned long) ipr_cmd;
7771         ipr_cmd->timer.expires = jiffies + timeout;
7772         ipr_cmd->timer.function = (void (*)(unsigned long))ipr_reset_timer_done;
7773         add_timer(&ipr_cmd->timer);
7774 }
7775 
7776 /**
7777  * ipr_init_ioa_mem - Initialize ioa_cfg control block
7778  * @ioa_cfg:    ioa cfg struct
7779  *
7780  * Return value:
7781  *      nothing
7782  **/
7783 static void ipr_init_ioa_mem(struct ipr_ioa_cfg *ioa_cfg)
7784 {
7785         struct ipr_hrr_queue *hrrq;
7786 
7787         for_each_hrrq(hrrq, ioa_cfg) {
7788                 spin_lock(&hrrq->_lock);
7789                 memset(hrrq->host_rrq, 0, sizeof(u32) * hrrq->size);
7790 
7791                 /* Initialize Host RRQ pointers */
7792                 hrrq->hrrq_start = hrrq->host_rrq;
7793                 hrrq->hrrq_end = &hrrq->host_rrq[hrrq->size - 1];
7794                 hrrq->hrrq_curr = hrrq->hrrq_start;
7795                 hrrq->toggle_bit = 1;
7796                 spin_unlock(&hrrq->_lock);
7797         }
7798         wmb();
7799 
7800         ioa_cfg->identify_hrrq_index = 0;
7801         if (ioa_cfg->hrrq_num == 1)
7802                 atomic_set(&ioa_cfg->hrrq_index, 0);
7803         else
7804                 atomic_set(&ioa_cfg->hrrq_index, 1);
7805 
7806         /* Zero out config table */
7807         memset(ioa_cfg->u.cfg_table, 0, ioa_cfg->cfg_table_size);
7808 }
7809 
7810 /**
7811  * ipr_reset_next_stage - Process IPL stage change based on feedback register.
7812  * @ipr_cmd:    ipr command struct
7813  *
7814  * Return value:
7815  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7816  **/
7817 static int ipr_reset_next_stage(struct ipr_cmnd *ipr_cmd)
7818 {
7819         unsigned long stage, stage_time;
7820         u32 feedback;
7821         volatile u32 int_reg;
7822         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7823         u64 maskval = 0;
7824 
7825         feedback = readl(ioa_cfg->regs.init_feedback_reg);
7826         stage = feedback & IPR_IPL_INIT_STAGE_MASK;
7827         stage_time = feedback & IPR_IPL_INIT_STAGE_TIME_MASK;
7828 
7829         ipr_dbg("IPL stage = 0x%lx, IPL stage time = %ld\n", stage, stage_time);
7830 
7831         /* sanity check the stage_time value */
7832         if (stage_time == 0)
7833                 stage_time = IPR_IPL_INIT_DEFAULT_STAGE_TIME;
7834         else if (stage_time < IPR_IPL_INIT_MIN_STAGE_TIME)
7835                 stage_time = IPR_IPL_INIT_MIN_STAGE_TIME;
7836         else if (stage_time > IPR_LONG_OPERATIONAL_TIMEOUT)
7837                 stage_time = IPR_LONG_OPERATIONAL_TIMEOUT;
7838 
7839         if (stage == IPR_IPL_INIT_STAGE_UNKNOWN) {
7840                 writel(IPR_PCII_IPL_STAGE_CHANGE, ioa_cfg->regs.set_interrupt_mask_reg);
7841                 int_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
7842                 stage_time = ioa_cfg->transop_timeout;
7843                 ipr_cmd->job_step = ipr_ioafp_identify_hrrq;
7844         } else if (stage == IPR_IPL_INIT_STAGE_TRANSOP) {
7845                 int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
7846                 if (int_reg & IPR_PCII_IOA_TRANS_TO_OPER) {
7847                         ipr_cmd->job_step = ipr_ioafp_identify_hrrq;
7848                         maskval = IPR_PCII_IPL_STAGE_CHANGE;
7849                         maskval = (maskval << 32) | IPR_PCII_IOA_TRANS_TO_OPER;
7850                         writeq(maskval, ioa_cfg->regs.set_interrupt_mask_reg);
7851                         int_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
7852                         return IPR_RC_JOB_CONTINUE;
7853                 }
7854         }
7855 
7856         ipr_cmd->timer.data = (unsigned long) ipr_cmd;
7857         ipr_cmd->timer.expires = jiffies + stage_time * HZ;
7858         ipr_cmd->timer.function = (void (*)(unsigned long))ipr_oper_timeout;
7859         ipr_cmd->done = ipr_reset_ioa_job;
7860         add_timer(&ipr_cmd->timer);
7861 
7862         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
7863 
7864         return IPR_RC_JOB_RETURN;
7865 }
7866 
7867 /**
7868  * ipr_reset_enable_ioa - Enable the IOA following a reset.
7869  * @ipr_cmd:    ipr command struct
7870  *
7871  * This function reinitializes some control blocks and
7872  * enables destructive diagnostics on the adapter.
7873  *
7874  * Return value:
7875  *      IPR_RC_JOB_RETURN
7876  **/
7877 static int ipr_reset_enable_ioa(struct ipr_cmnd *ipr_cmd)
7878 {
7879         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7880         volatile u32 int_reg;
7881         volatile u64 maskval;
7882         int i;
7883 
7884         ENTER;
7885         ipr_cmd->job_step = ipr_ioafp_identify_hrrq;
7886         ipr_init_ioa_mem(ioa_cfg);
7887 
7888         for (i = 0; i < ioa_cfg->hrrq_num; i++) {
7889                 spin_lock(&ioa_cfg->hrrq[i]._lock);
7890                 ioa_cfg->hrrq[i].allow_interrupts = 1;
7891                 spin_unlock(&ioa_cfg->hrrq[i]._lock);
7892         }
7893         wmb();
7894         if (ioa_cfg->sis64) {
7895                 /* Set the adapter to the correct endian mode. */
7896                 writel(IPR_ENDIAN_SWAP_KEY, ioa_cfg->regs.endian_swap_reg);
7897                 int_reg = readl(ioa_cfg->regs.endian_swap_reg);
7898         }
7899 
7900         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
7901 
7902         if (int_reg & IPR_PCII_IOA_TRANS_TO_OPER) {
7903                 writel((IPR_PCII_ERROR_INTERRUPTS | IPR_PCII_HRRQ_UPDATED),
7904                        ioa_cfg->regs.clr_interrupt_mask_reg32);
7905                 int_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
7906                 return IPR_RC_JOB_CONTINUE;
7907         }
7908 
7909         /* Enable destructive diagnostics on IOA */
7910         writel(ioa_cfg->doorbell, ioa_cfg->regs.set_uproc_interrupt_reg32);
7911 
7912         if (ioa_cfg->sis64) {
7913                 maskval = IPR_PCII_IPL_STAGE_CHANGE;
7914                 maskval = (maskval << 32) | IPR_PCII_OPER_INTERRUPTS;
7915                 writeq(maskval, ioa_cfg->regs.clr_interrupt_mask_reg);
7916         } else
7917                 writel(IPR_PCII_OPER_INTERRUPTS, ioa_cfg->regs.clr_interrupt_mask_reg32);
7918 
7919         int_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
7920 
7921         dev_info(&ioa_cfg->pdev->dev, "Initializing IOA.\n");
7922 
7923         if (ioa_cfg->sis64) {
7924                 ipr_cmd->job_step = ipr_reset_next_stage;
7925                 return IPR_RC_JOB_CONTINUE;
7926         }
7927 
7928         ipr_cmd->timer.data = (unsigned long) ipr_cmd;
7929         ipr_cmd->timer.expires = jiffies + (ioa_cfg->transop_timeout * HZ);
7930         ipr_cmd->timer.function = (void (*)(unsigned long))ipr_oper_timeout;
7931         ipr_cmd->done = ipr_reset_ioa_job;
7932         add_timer(&ipr_cmd->timer);
7933         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
7934 
7935         LEAVE;
7936         return IPR_RC_JOB_RETURN;
7937 }
7938 
7939 /**
7940  * ipr_reset_wait_for_dump - Wait for a dump to timeout.
7941  * @ipr_cmd:    ipr command struct
7942  *
7943  * This function is invoked when an adapter dump has run out
7944  * of processing time.
7945  *
7946  * Return value:
7947  *      IPR_RC_JOB_CONTINUE
7948  **/
7949 static int ipr_reset_wait_for_dump(struct ipr_cmnd *ipr_cmd)
7950 {
7951         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7952 
7953         if (ioa_cfg->sdt_state == GET_DUMP)
7954                 ioa_cfg->sdt_state = WAIT_FOR_DUMP;
7955         else if (ioa_cfg->sdt_state == READ_DUMP)
7956                 ioa_cfg->sdt_state = ABORT_DUMP;
7957 
7958         ioa_cfg->dump_timeout = 1;
7959         ipr_cmd->job_step = ipr_reset_alert;
7960 
7961         return IPR_RC_JOB_CONTINUE;
7962 }
7963 
7964 /**
7965  * ipr_unit_check_no_data - Log a unit check/no data error log
7966  * @ioa_cfg:            ioa config struct
7967  *
7968  * Logs an error indicating the adapter unit checked, but for some
7969  * reason, we were unable to fetch the unit check buffer.
7970  *
7971  * Return value:
7972  *      nothing
7973  **/
7974 static void ipr_unit_check_no_data(struct ipr_ioa_cfg *ioa_cfg)
7975 {
7976         ioa_cfg->errors_logged++;
7977         dev_err(&ioa_cfg->pdev->dev, "IOA unit check with no data\n");
7978 }
7979 
7980 /**
7981  * ipr_get_unit_check_buffer - Get the unit check buffer from the IOA
7982  * @ioa_cfg:            ioa config struct
7983  *
7984  * Fetches the unit check buffer from the adapter by clocking the data
7985  * through the mailbox register.
7986  *
7987  * Return value:
7988  *      nothing
7989  **/
7990 static void ipr_get_unit_check_buffer(struct ipr_ioa_cfg *ioa_cfg)
7991 {
7992         unsigned long mailbox;