Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4

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 unsigned int ipr_fast_reboot;
103 static DEFINE_SPINLOCK(ipr_driver_lock);
104 
105 /* This table describes the differences between DMA controller chips */
106 static const struct ipr_chip_cfg_t ipr_chip_cfg[] = {
107         { /* Gemstone, Citrine, Obsidian, and Obsidian-E */
108                 .mailbox = 0x0042C,
109                 .max_cmds = 100,
110                 .cache_line_size = 0x20,
111                 .clear_isr = 1,
112                 .iopoll_weight = 0,
113                 {
114                         .set_interrupt_mask_reg = 0x0022C,
115                         .clr_interrupt_mask_reg = 0x00230,
116                         .clr_interrupt_mask_reg32 = 0x00230,
117                         .sense_interrupt_mask_reg = 0x0022C,
118                         .sense_interrupt_mask_reg32 = 0x0022C,
119                         .clr_interrupt_reg = 0x00228,
120                         .clr_interrupt_reg32 = 0x00228,
121                         .sense_interrupt_reg = 0x00224,
122                         .sense_interrupt_reg32 = 0x00224,
123                         .ioarrin_reg = 0x00404,
124                         .sense_uproc_interrupt_reg = 0x00214,
125                         .sense_uproc_interrupt_reg32 = 0x00214,
126                         .set_uproc_interrupt_reg = 0x00214,
127                         .set_uproc_interrupt_reg32 = 0x00214,
128                         .clr_uproc_interrupt_reg = 0x00218,
129                         .clr_uproc_interrupt_reg32 = 0x00218
130                 }
131         },
132         { /* Snipe and Scamp */
133                 .mailbox = 0x0052C,
134                 .max_cmds = 100,
135                 .cache_line_size = 0x20,
136                 .clear_isr = 1,
137                 .iopoll_weight = 0,
138                 {
139                         .set_interrupt_mask_reg = 0x00288,
140                         .clr_interrupt_mask_reg = 0x0028C,
141                         .clr_interrupt_mask_reg32 = 0x0028C,
142                         .sense_interrupt_mask_reg = 0x00288,
143                         .sense_interrupt_mask_reg32 = 0x00288,
144                         .clr_interrupt_reg = 0x00284,
145                         .clr_interrupt_reg32 = 0x00284,
146                         .sense_interrupt_reg = 0x00280,
147                         .sense_interrupt_reg32 = 0x00280,
148                         .ioarrin_reg = 0x00504,
149                         .sense_uproc_interrupt_reg = 0x00290,
150                         .sense_uproc_interrupt_reg32 = 0x00290,
151                         .set_uproc_interrupt_reg = 0x00290,
152                         .set_uproc_interrupt_reg32 = 0x00290,
153                         .clr_uproc_interrupt_reg = 0x00294,
154                         .clr_uproc_interrupt_reg32 = 0x00294
155                 }
156         },
157         { /* CRoC */
158                 .mailbox = 0x00044,
159                 .max_cmds = 1000,
160                 .cache_line_size = 0x20,
161                 .clear_isr = 0,
162                 .iopoll_weight = 64,
163                 {
164                         .set_interrupt_mask_reg = 0x00010,
165                         .clr_interrupt_mask_reg = 0x00018,
166                         .clr_interrupt_mask_reg32 = 0x0001C,
167                         .sense_interrupt_mask_reg = 0x00010,
168                         .sense_interrupt_mask_reg32 = 0x00014,
169                         .clr_interrupt_reg = 0x00008,
170                         .clr_interrupt_reg32 = 0x0000C,
171                         .sense_interrupt_reg = 0x00000,
172                         .sense_interrupt_reg32 = 0x00004,
173                         .ioarrin_reg = 0x00070,
174                         .sense_uproc_interrupt_reg = 0x00020,
175                         .sense_uproc_interrupt_reg32 = 0x00024,
176                         .set_uproc_interrupt_reg = 0x00020,
177                         .set_uproc_interrupt_reg32 = 0x00024,
178                         .clr_uproc_interrupt_reg = 0x00028,
179                         .clr_uproc_interrupt_reg32 = 0x0002C,
180                         .init_feedback_reg = 0x0005C,
181                         .dump_addr_reg = 0x00064,
182                         .dump_data_reg = 0x00068,
183                         .endian_swap_reg = 0x00084
184                 }
185         },
186 };
187 
188 static const struct ipr_chip_t ipr_chip[] = {
189         { PCI_VENDOR_ID_MYLEX, PCI_DEVICE_ID_IBM_GEMSTONE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
190         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
191         { PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_OBSIDIAN, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
192         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
193         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E, IPR_USE_MSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
194         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_SNIPE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[1] },
195         { PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_SCAMP, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[1] },
196         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROC_FPGA_E2, IPR_USE_MSI, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] },
197         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE, IPR_USE_MSI, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] }
198 };
199 
200 static int ipr_max_bus_speeds[] = {
201         IPR_80MBs_SCSI_RATE, IPR_U160_SCSI_RATE, IPR_U320_SCSI_RATE
202 };
203 
204 MODULE_AUTHOR("Brian King <brking@us.ibm.com>");
205 MODULE_DESCRIPTION("IBM Power RAID SCSI Adapter Driver");
206 module_param_named(max_speed, ipr_max_speed, uint, 0);
207 MODULE_PARM_DESC(max_speed, "Maximum bus speed (0-2). Default: 1=U160. Speeds: 0=80 MB/s, 1=U160, 2=U320");
208 module_param_named(log_level, ipr_log_level, uint, 0);
209 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver");
210 module_param_named(testmode, ipr_testmode, int, 0);
211 MODULE_PARM_DESC(testmode, "DANGEROUS!!! Allows unsupported configurations");
212 module_param_named(fastfail, ipr_fastfail, int, S_IRUGO | S_IWUSR);
213 MODULE_PARM_DESC(fastfail, "Reduce timeouts and retries");
214 module_param_named(transop_timeout, ipr_transop_timeout, int, 0);
215 MODULE_PARM_DESC(transop_timeout, "Time in seconds to wait for adapter to come operational (default: 300)");
216 module_param_named(debug, ipr_debug, int, S_IRUGO | S_IWUSR);
217 MODULE_PARM_DESC(debug, "Enable device driver debugging logging. Set to 1 to enable. (default: 0)");
218 module_param_named(dual_ioa_raid, ipr_dual_ioa_raid, int, 0);
219 MODULE_PARM_DESC(dual_ioa_raid, "Enable dual adapter RAID support. Set to 1 to enable. (default: 1)");
220 module_param_named(max_devs, ipr_max_devs, int, 0);
221 MODULE_PARM_DESC(max_devs, "Specify the maximum number of physical devices. "
222                  "[Default=" __stringify(IPR_DEFAULT_SIS64_DEVS) "]");
223 module_param_named(number_of_msix, ipr_number_of_msix, int, 0);
224 MODULE_PARM_DESC(number_of_msix, "Specify the number of MSIX interrupts to use on capable adapters (1 - 16).  (default:2)");
225 module_param_named(fast_reboot, ipr_fast_reboot, int, S_IRUGO | S_IWUSR);
226 MODULE_PARM_DESC(fast_reboot, "Skip adapter shutdown during reboot. Set to 1 to enable. (default: 0)");
227 MODULE_LICENSE("GPL");
228 MODULE_VERSION(IPR_DRIVER_VERSION);
229 
230 /*  A constant array of IOASCs/URCs/Error Messages */
231 static const
232 struct ipr_error_table_t ipr_error_table[] = {
233         {0x00000000, 1, IPR_DEFAULT_LOG_LEVEL,
234         "8155: An unknown error was received"},
235         {0x00330000, 0, 0,
236         "Soft underlength error"},
237         {0x005A0000, 0, 0,
238         "Command to be cancelled not found"},
239         {0x00808000, 0, 0,
240         "Qualified success"},
241         {0x01080000, 1, IPR_DEFAULT_LOG_LEVEL,
242         "FFFE: Soft device bus error recovered by the IOA"},
243         {0x01088100, 0, IPR_DEFAULT_LOG_LEVEL,
244         "4101: Soft device bus fabric error"},
245         {0x01100100, 0, IPR_DEFAULT_LOG_LEVEL,
246         "FFFC: Logical block guard error recovered by the device"},
247         {0x01100300, 0, IPR_DEFAULT_LOG_LEVEL,
248         "FFFC: Logical block reference tag error recovered by the device"},
249         {0x01108300, 0, IPR_DEFAULT_LOG_LEVEL,
250         "4171: Recovered scatter list tag / sequence number error"},
251         {0x01109000, 0, IPR_DEFAULT_LOG_LEVEL,
252         "FF3D: Recovered logical block CRC error on IOA to Host transfer"},
253         {0x01109200, 0, IPR_DEFAULT_LOG_LEVEL,
254         "4171: Recovered logical block sequence number error on IOA to Host transfer"},
255         {0x0110A000, 0, IPR_DEFAULT_LOG_LEVEL,
256         "FFFD: Recovered logical block reference tag error detected by the IOA"},
257         {0x0110A100, 0, IPR_DEFAULT_LOG_LEVEL,
258         "FFFD: Logical block guard error recovered by the IOA"},
259         {0x01170600, 0, IPR_DEFAULT_LOG_LEVEL,
260         "FFF9: Device sector reassign successful"},
261         {0x01170900, 0, IPR_DEFAULT_LOG_LEVEL,
262         "FFF7: Media error recovered by device rewrite procedures"},
263         {0x01180200, 0, IPR_DEFAULT_LOG_LEVEL,
264         "7001: IOA sector reassignment successful"},
265         {0x01180500, 0, IPR_DEFAULT_LOG_LEVEL,
266         "FFF9: Soft media error. Sector reassignment recommended"},
267         {0x01180600, 0, IPR_DEFAULT_LOG_LEVEL,
268         "FFF7: Media error recovered by IOA rewrite procedures"},
269         {0x01418000, 0, IPR_DEFAULT_LOG_LEVEL,
270         "FF3D: Soft PCI bus error recovered by the IOA"},
271         {0x01440000, 1, IPR_DEFAULT_LOG_LEVEL,
272         "FFF6: Device hardware error recovered by the IOA"},
273         {0x01448100, 0, IPR_DEFAULT_LOG_LEVEL,
274         "FFF6: Device hardware error recovered by the device"},
275         {0x01448200, 1, IPR_DEFAULT_LOG_LEVEL,
276         "FF3D: Soft IOA error recovered by the IOA"},
277         {0x01448300, 0, IPR_DEFAULT_LOG_LEVEL,
278         "FFFA: Undefined device response recovered by the IOA"},
279         {0x014A0000, 1, IPR_DEFAULT_LOG_LEVEL,
280         "FFF6: Device bus error, message or command phase"},
281         {0x014A8000, 0, IPR_DEFAULT_LOG_LEVEL,
282         "FFFE: Task Management Function failed"},
283         {0x015D0000, 0, IPR_DEFAULT_LOG_LEVEL,
284         "FFF6: Failure prediction threshold exceeded"},
285         {0x015D9200, 0, IPR_DEFAULT_LOG_LEVEL,
286         "8009: Impending cache battery pack failure"},
287         {0x02040100, 0, 0,
288         "Logical Unit in process of becoming ready"},
289         {0x02040200, 0, 0,
290         "Initializing command required"},
291         {0x02040400, 0, 0,
292         "34FF: Disk device format in progress"},
293         {0x02040C00, 0, 0,
294         "Logical unit not accessible, target port in unavailable state"},
295         {0x02048000, 0, IPR_DEFAULT_LOG_LEVEL,
296         "9070: IOA requested reset"},
297         {0x023F0000, 0, 0,
298         "Synchronization required"},
299         {0x02408500, 0, 0,
300         "IOA microcode download required"},
301         {0x02408600, 0, 0,
302         "Device bus connection is prohibited by host"},
303         {0x024E0000, 0, 0,
304         "No ready, IOA shutdown"},
305         {0x025A0000, 0, 0,
306         "Not ready, IOA has been shutdown"},
307         {0x02670100, 0, IPR_DEFAULT_LOG_LEVEL,
308         "3020: Storage subsystem configuration error"},
309         {0x03110B00, 0, 0,
310         "FFF5: Medium error, data unreadable, recommend reassign"},
311         {0x03110C00, 0, 0,
312         "7000: Medium error, data unreadable, do not reassign"},
313         {0x03310000, 0, IPR_DEFAULT_LOG_LEVEL,
314         "FFF3: Disk media format bad"},
315         {0x04050000, 0, IPR_DEFAULT_LOG_LEVEL,
316         "3002: Addressed device failed to respond to selection"},
317         {0x04080000, 1, IPR_DEFAULT_LOG_LEVEL,
318         "3100: Device bus error"},
319         {0x04080100, 0, IPR_DEFAULT_LOG_LEVEL,
320         "3109: IOA timed out a device command"},
321         {0x04088000, 0, 0,
322         "3120: SCSI bus is not operational"},
323         {0x04088100, 0, IPR_DEFAULT_LOG_LEVEL,
324         "4100: Hard device bus fabric error"},
325         {0x04100100, 0, IPR_DEFAULT_LOG_LEVEL,
326         "310C: Logical block guard error detected by the device"},
327         {0x04100300, 0, IPR_DEFAULT_LOG_LEVEL,
328         "310C: Logical block reference tag error detected by the device"},
329         {0x04108300, 1, IPR_DEFAULT_LOG_LEVEL,
330         "4170: Scatter list tag / sequence number error"},
331         {0x04109000, 1, IPR_DEFAULT_LOG_LEVEL,
332         "8150: Logical block CRC error on IOA to Host transfer"},
333         {0x04109200, 1, IPR_DEFAULT_LOG_LEVEL,
334         "4170: Logical block sequence number error on IOA to Host transfer"},
335         {0x0410A000, 0, IPR_DEFAULT_LOG_LEVEL,
336         "310D: Logical block reference tag error detected by the IOA"},
337         {0x0410A100, 0, IPR_DEFAULT_LOG_LEVEL,
338         "310D: Logical block guard error detected by the IOA"},
339         {0x04118000, 0, IPR_DEFAULT_LOG_LEVEL,
340         "9000: IOA reserved area data check"},
341         {0x04118100, 0, IPR_DEFAULT_LOG_LEVEL,
342         "9001: IOA reserved area invalid data pattern"},
343         {0x04118200, 0, IPR_DEFAULT_LOG_LEVEL,
344         "9002: IOA reserved area LRC error"},
345         {0x04118300, 1, IPR_DEFAULT_LOG_LEVEL,
346         "Hardware Error, IOA metadata access error"},
347         {0x04320000, 0, IPR_DEFAULT_LOG_LEVEL,
348         "102E: Out of alternate sectors for disk storage"},
349         {0x04330000, 1, IPR_DEFAULT_LOG_LEVEL,
350         "FFF4: Data transfer underlength error"},
351         {0x04338000, 1, IPR_DEFAULT_LOG_LEVEL,
352         "FFF4: Data transfer overlength error"},
353         {0x043E0100, 0, IPR_DEFAULT_LOG_LEVEL,
354         "3400: Logical unit failure"},
355         {0x04408500, 0, IPR_DEFAULT_LOG_LEVEL,
356         "FFF4: Device microcode is corrupt"},
357         {0x04418000, 1, IPR_DEFAULT_LOG_LEVEL,
358         "8150: PCI bus error"},
359         {0x04430000, 1, 0,
360         "Unsupported device bus message received"},
361         {0x04440000, 1, IPR_DEFAULT_LOG_LEVEL,
362         "FFF4: Disk device problem"},
363         {0x04448200, 1, IPR_DEFAULT_LOG_LEVEL,
364         "8150: Permanent IOA failure"},
365         {0x04448300, 0, IPR_DEFAULT_LOG_LEVEL,
366         "3010: Disk device returned wrong response to IOA"},
367         {0x04448400, 0, IPR_DEFAULT_LOG_LEVEL,
368         "8151: IOA microcode error"},
369         {0x04448500, 0, 0,
370         "Device bus status error"},
371         {0x04448600, 0, IPR_DEFAULT_LOG_LEVEL,
372         "8157: IOA error requiring IOA reset to recover"},
373         {0x04448700, 0, 0,
374         "ATA device status error"},
375         {0x04490000, 0, 0,
376         "Message reject received from the device"},
377         {0x04449200, 0, IPR_DEFAULT_LOG_LEVEL,
378         "8008: A permanent cache battery pack failure occurred"},
379         {0x0444A000, 0, IPR_DEFAULT_LOG_LEVEL,
380         "9090: Disk unit has been modified after the last known status"},
381         {0x0444A200, 0, IPR_DEFAULT_LOG_LEVEL,
382         "9081: IOA detected device error"},
383         {0x0444A300, 0, IPR_DEFAULT_LOG_LEVEL,
384         "9082: IOA detected device error"},
385         {0x044A0000, 1, IPR_DEFAULT_LOG_LEVEL,
386         "3110: Device bus error, message or command phase"},
387         {0x044A8000, 1, IPR_DEFAULT_LOG_LEVEL,
388         "3110: SAS Command / Task Management Function failed"},
389         {0x04670400, 0, IPR_DEFAULT_LOG_LEVEL,
390         "9091: Incorrect hardware configuration change has been detected"},
391         {0x04678000, 0, IPR_DEFAULT_LOG_LEVEL,
392         "9073: Invalid multi-adapter configuration"},
393         {0x04678100, 0, IPR_DEFAULT_LOG_LEVEL,
394         "4010: Incorrect connection between cascaded expanders"},
395         {0x04678200, 0, IPR_DEFAULT_LOG_LEVEL,
396         "4020: Connections exceed IOA design limits"},
397         {0x04678300, 0, IPR_DEFAULT_LOG_LEVEL,
398         "4030: Incorrect multipath connection"},
399         {0x04679000, 0, IPR_DEFAULT_LOG_LEVEL,
400         "4110: Unsupported enclosure function"},
401         {0x04679800, 0, IPR_DEFAULT_LOG_LEVEL,
402         "4120: SAS cable VPD cannot be read"},
403         {0x046E0000, 0, IPR_DEFAULT_LOG_LEVEL,
404         "FFF4: Command to logical unit failed"},
405         {0x05240000, 1, 0,
406         "Illegal request, invalid request type or request packet"},
407         {0x05250000, 0, 0,
408         "Illegal request, invalid resource handle"},
409         {0x05258000, 0, 0,
410         "Illegal request, commands not allowed to this device"},
411         {0x05258100, 0, 0,
412         "Illegal request, command not allowed to a secondary adapter"},
413         {0x05258200, 0, 0,
414         "Illegal request, command not allowed to a non-optimized resource"},
415         {0x05260000, 0, 0,
416         "Illegal request, invalid field in parameter list"},
417         {0x05260100, 0, 0,
418         "Illegal request, parameter not supported"},
419         {0x05260200, 0, 0,
420         "Illegal request, parameter value invalid"},
421         {0x052C0000, 0, 0,
422         "Illegal request, command sequence error"},
423         {0x052C8000, 1, 0,
424         "Illegal request, dual adapter support not enabled"},
425         {0x052C8100, 1, 0,
426         "Illegal request, another cable connector was physically disabled"},
427         {0x054E8000, 1, 0,
428         "Illegal request, inconsistent group id/group count"},
429         {0x06040500, 0, IPR_DEFAULT_LOG_LEVEL,
430         "9031: Array protection temporarily suspended, protection resuming"},
431         {0x06040600, 0, IPR_DEFAULT_LOG_LEVEL,
432         "9040: Array protection temporarily suspended, protection resuming"},
433         {0x060B0100, 0, IPR_DEFAULT_LOG_LEVEL,
434         "4080: IOA exceeded maximum operating temperature"},
435         {0x060B8000, 0, IPR_DEFAULT_LOG_LEVEL,
436         "4085: Service required"},
437         {0x06288000, 0, IPR_DEFAULT_LOG_LEVEL,
438         "3140: Device bus not ready to ready transition"},
439         {0x06290000, 0, IPR_DEFAULT_LOG_LEVEL,
440         "FFFB: SCSI bus was reset"},
441         {0x06290500, 0, 0,
442         "FFFE: SCSI bus transition to single ended"},
443         {0x06290600, 0, 0,
444         "FFFE: SCSI bus transition to LVD"},
445         {0x06298000, 0, IPR_DEFAULT_LOG_LEVEL,
446         "FFFB: SCSI bus was reset by another initiator"},
447         {0x063F0300, 0, IPR_DEFAULT_LOG_LEVEL,
448         "3029: A device replacement has occurred"},
449         {0x063F8300, 0, IPR_DEFAULT_LOG_LEVEL,
450         "4102: Device bus fabric performance degradation"},
451         {0x064C8000, 0, IPR_DEFAULT_LOG_LEVEL,
452         "9051: IOA cache data exists for a missing or failed device"},
453         {0x064C8100, 0, IPR_DEFAULT_LOG_LEVEL,
454         "9055: Auxiliary cache IOA contains cache data needed by the primary IOA"},
455         {0x06670100, 0, IPR_DEFAULT_LOG_LEVEL,
456         "9025: Disk unit is not supported at its physical location"},
457         {0x06670600, 0, IPR_DEFAULT_LOG_LEVEL,
458         "3020: IOA detected a SCSI bus configuration error"},
459         {0x06678000, 0, IPR_DEFAULT_LOG_LEVEL,
460         "3150: SCSI bus configuration error"},
461         {0x06678100, 0, IPR_DEFAULT_LOG_LEVEL,
462         "9074: Asymmetric advanced function disk configuration"},
463         {0x06678300, 0, IPR_DEFAULT_LOG_LEVEL,
464         "4040: Incomplete multipath connection between IOA and enclosure"},
465         {0x06678400, 0, IPR_DEFAULT_LOG_LEVEL,
466         "4041: Incomplete multipath connection between enclosure and device"},
467         {0x06678500, 0, IPR_DEFAULT_LOG_LEVEL,
468         "9075: Incomplete multipath connection between IOA and remote IOA"},
469         {0x06678600, 0, IPR_DEFAULT_LOG_LEVEL,
470         "9076: Configuration error, missing remote IOA"},
471         {0x06679100, 0, IPR_DEFAULT_LOG_LEVEL,
472         "4050: Enclosure does not support a required multipath function"},
473         {0x06679800, 0, IPR_DEFAULT_LOG_LEVEL,
474         "4121: Configuration error, required cable is missing"},
475         {0x06679900, 0, IPR_DEFAULT_LOG_LEVEL,
476         "4122: Cable is not plugged into the correct location on remote IOA"},
477         {0x06679A00, 0, IPR_DEFAULT_LOG_LEVEL,
478         "4123: Configuration error, invalid cable vital product data"},
479         {0x06679B00, 0, IPR_DEFAULT_LOG_LEVEL,
480         "4124: Configuration error, both cable ends are plugged into the same IOA"},
481         {0x06690000, 0, IPR_DEFAULT_LOG_LEVEL,
482         "4070: Logically bad block written on device"},
483         {0x06690200, 0, IPR_DEFAULT_LOG_LEVEL,
484         "9041: Array protection temporarily suspended"},
485         {0x06698200, 0, IPR_DEFAULT_LOG_LEVEL,
486         "9042: Corrupt array parity detected on specified device"},
487         {0x066B0200, 0, IPR_DEFAULT_LOG_LEVEL,
488         "9030: Array no longer protected due to missing or failed disk unit"},
489         {0x066B8000, 0, IPR_DEFAULT_LOG_LEVEL,
490         "9071: Link operational transition"},
491         {0x066B8100, 0, IPR_DEFAULT_LOG_LEVEL,
492         "9072: Link not operational transition"},
493         {0x066B8200, 0, IPR_DEFAULT_LOG_LEVEL,
494         "9032: Array exposed but still protected"},
495         {0x066B8300, 0, IPR_DEFAULT_LOG_LEVEL + 1,
496         "70DD: Device forced failed by disrupt device command"},
497         {0x066B9100, 0, IPR_DEFAULT_LOG_LEVEL,
498         "4061: Multipath redundancy level got better"},
499         {0x066B9200, 0, IPR_DEFAULT_LOG_LEVEL,
500         "4060: Multipath redundancy level got worse"},
501         {0x06808100, 0, IPR_DEFAULT_LOG_LEVEL,
502         "9083: Device raw mode enabled"},
503         {0x06808200, 0, IPR_DEFAULT_LOG_LEVEL,
504         "9084: Device raw mode disabled"},
505         {0x07270000, 0, 0,
506         "Failure due to other device"},
507         {0x07278000, 0, IPR_DEFAULT_LOG_LEVEL,
508         "9008: IOA does not support functions expected by devices"},
509         {0x07278100, 0, IPR_DEFAULT_LOG_LEVEL,
510         "9010: Cache data associated with attached devices cannot be found"},
511         {0x07278200, 0, IPR_DEFAULT_LOG_LEVEL,
512         "9011: Cache data belongs to devices other than those attached"},
513         {0x07278400, 0, IPR_DEFAULT_LOG_LEVEL,
514         "9020: Array missing 2 or more devices with only 1 device present"},
515         {0x07278500, 0, IPR_DEFAULT_LOG_LEVEL,
516         "9021: Array missing 2 or more devices with 2 or more devices present"},
517         {0x07278600, 0, IPR_DEFAULT_LOG_LEVEL,
518         "9022: Exposed array is missing a required device"},
519         {0x07278700, 0, IPR_DEFAULT_LOG_LEVEL,
520         "9023: Array member(s) not at required physical locations"},
521         {0x07278800, 0, IPR_DEFAULT_LOG_LEVEL,
522         "9024: Array not functional due to present hardware configuration"},
523         {0x07278900, 0, IPR_DEFAULT_LOG_LEVEL,
524         "9026: Array not functional due to present hardware configuration"},
525         {0x07278A00, 0, IPR_DEFAULT_LOG_LEVEL,
526         "9027: Array is missing a device and parity is out of sync"},
527         {0x07278B00, 0, IPR_DEFAULT_LOG_LEVEL,
528         "9028: Maximum number of arrays already exist"},
529         {0x07278C00, 0, IPR_DEFAULT_LOG_LEVEL,
530         "9050: Required cache data cannot be located for a disk unit"},
531         {0x07278D00, 0, IPR_DEFAULT_LOG_LEVEL,
532         "9052: Cache data exists for a device that has been modified"},
533         {0x07278F00, 0, IPR_DEFAULT_LOG_LEVEL,
534         "9054: IOA resources not available due to previous problems"},
535         {0x07279100, 0, IPR_DEFAULT_LOG_LEVEL,
536         "9092: Disk unit requires initialization before use"},
537         {0x07279200, 0, IPR_DEFAULT_LOG_LEVEL,
538         "9029: Incorrect hardware configuration change has been detected"},
539         {0x07279600, 0, IPR_DEFAULT_LOG_LEVEL,
540         "9060: One or more disk pairs are missing from an array"},
541         {0x07279700, 0, IPR_DEFAULT_LOG_LEVEL,
542         "9061: One or more disks are missing from an array"},
543         {0x07279800, 0, IPR_DEFAULT_LOG_LEVEL,
544         "9062: One or more disks are missing from an array"},
545         {0x07279900, 0, IPR_DEFAULT_LOG_LEVEL,
546         "9063: Maximum number of functional arrays has been exceeded"},
547         {0x07279A00, 0, 0,
548         "Data protect, other volume set problem"},
549         {0x0B260000, 0, 0,
550         "Aborted command, invalid descriptor"},
551         {0x0B3F9000, 0, 0,
552         "Target operating conditions have changed, dual adapter takeover"},
553         {0x0B530200, 0, 0,
554         "Aborted command, medium removal prevented"},
555         {0x0B5A0000, 0, 0,
556         "Command terminated by host"},
557         {0x0B5B8000, 0, 0,
558         "Aborted command, command terminated by host"}
559 };
560 
561 static const struct ipr_ses_table_entry ipr_ses_table[] = {
562         { "2104-DL1        ", "XXXXXXXXXXXXXXXX", 80 },
563         { "2104-TL1        ", "XXXXXXXXXXXXXXXX", 80 },
564         { "HSBP07M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 7 slot */
565         { "HSBP05M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 5 slot */
566         { "HSBP05M S U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Bowtie */
567         { "HSBP06E ASU2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* MartinFenning */
568         { "2104-DU3        ", "XXXXXXXXXXXXXXXX", 160 },
569         { "2104-TU3        ", "XXXXXXXXXXXXXXXX", 160 },
570         { "HSBP04C RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
571         { "HSBP06E RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
572         { "St  V1S2        ", "XXXXXXXXXXXXXXXX", 160 },
573         { "HSBPD4M  PU3SCSI", "XXXXXXX*XXXXXXXX", 160 },
574         { "VSBPD1H   U3SCSI", "XXXXXXX*XXXXXXXX", 160 }
575 };
576 
577 /*
578  *  Function Prototypes
579  */
580 static int ipr_reset_alert(struct ipr_cmnd *);
581 static void ipr_process_ccn(struct ipr_cmnd *);
582 static void ipr_process_error(struct ipr_cmnd *);
583 static void ipr_reset_ioa_job(struct ipr_cmnd *);
584 static void ipr_initiate_ioa_reset(struct ipr_ioa_cfg *,
585                                    enum ipr_shutdown_type);
586 
587 #ifdef CONFIG_SCSI_IPR_TRACE
588 /**
589  * ipr_trc_hook - Add a trace entry to the driver trace
590  * @ipr_cmd:    ipr command struct
591  * @type:               trace type
592  * @add_data:   additional data
593  *
594  * Return value:
595  *      none
596  **/
597 static void ipr_trc_hook(struct ipr_cmnd *ipr_cmd,
598                          u8 type, u32 add_data)
599 {
600         struct ipr_trace_entry *trace_entry;
601         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
602         unsigned int trace_index;
603 
604         trace_index = atomic_add_return(1, &ioa_cfg->trace_index) & IPR_TRACE_INDEX_MASK;
605         trace_entry = &ioa_cfg->trace[trace_index];
606         trace_entry->time = jiffies;
607         trace_entry->op_code = ipr_cmd->ioarcb.cmd_pkt.cdb[0];
608         trace_entry->type = type;
609         if (ipr_cmd->ioa_cfg->sis64)
610                 trace_entry->ata_op_code = ipr_cmd->i.ata_ioadl.regs.command;
611         else
612                 trace_entry->ata_op_code = ipr_cmd->ioarcb.u.add_data.u.regs.command;
613         trace_entry->cmd_index = ipr_cmd->cmd_index & 0xff;
614         trace_entry->res_handle = ipr_cmd->ioarcb.res_handle;
615         trace_entry->u.add_data = add_data;
616         wmb();
617 }
618 #else
619 #define ipr_trc_hook(ipr_cmd, type, add_data) do { } while (0)
620 #endif
621 
622 /**
623  * ipr_lock_and_done - Acquire lock and complete command
624  * @ipr_cmd:    ipr command struct
625  *
626  * Return value:
627  *      none
628  **/
629 static void ipr_lock_and_done(struct ipr_cmnd *ipr_cmd)
630 {
631         unsigned long lock_flags;
632         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
633 
634         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
635         ipr_cmd->done(ipr_cmd);
636         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
637 }
638 
639 /**
640  * ipr_reinit_ipr_cmnd - Re-initialize an IPR Cmnd block for reuse
641  * @ipr_cmd:    ipr command struct
642  *
643  * Return value:
644  *      none
645  **/
646 static void ipr_reinit_ipr_cmnd(struct ipr_cmnd *ipr_cmd)
647 {
648         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
649         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
650         struct ipr_ioasa64 *ioasa64 = &ipr_cmd->s.ioasa64;
651         dma_addr_t dma_addr = ipr_cmd->dma_addr;
652         int hrrq_id;
653 
654         hrrq_id = ioarcb->cmd_pkt.hrrq_id;
655         memset(&ioarcb->cmd_pkt, 0, sizeof(struct ipr_cmd_pkt));
656         ioarcb->cmd_pkt.hrrq_id = hrrq_id;
657         ioarcb->data_transfer_length = 0;
658         ioarcb->read_data_transfer_length = 0;
659         ioarcb->ioadl_len = 0;
660         ioarcb->read_ioadl_len = 0;
661 
662         if (ipr_cmd->ioa_cfg->sis64) {
663                 ioarcb->u.sis64_addr_data.data_ioadl_addr =
664                         cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ioadl64));
665                 ioasa64->u.gata.status = 0;
666         } else {
667                 ioarcb->write_ioadl_addr =
668                         cpu_to_be32(dma_addr + offsetof(struct ipr_cmnd, i.ioadl));
669                 ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
670                 ioasa->u.gata.status = 0;
671         }
672 
673         ioasa->hdr.ioasc = 0;
674         ioasa->hdr.residual_data_len = 0;
675         ipr_cmd->scsi_cmd = NULL;
676         ipr_cmd->qc = NULL;
677         ipr_cmd->sense_buffer[0] = 0;
678         ipr_cmd->dma_use_sg = 0;
679 }
680 
681 /**
682  * ipr_init_ipr_cmnd - Initialize an IPR Cmnd block
683  * @ipr_cmd:    ipr command struct
684  *
685  * Return value:
686  *      none
687  **/
688 static void ipr_init_ipr_cmnd(struct ipr_cmnd *ipr_cmd,
689                               void (*fast_done) (struct ipr_cmnd *))
690 {
691         ipr_reinit_ipr_cmnd(ipr_cmd);
692         ipr_cmd->u.scratch = 0;
693         ipr_cmd->sibling = NULL;
694         ipr_cmd->eh_comp = NULL;
695         ipr_cmd->fast_done = fast_done;
696         init_timer(&ipr_cmd->timer);
697 }
698 
699 /**
700  * __ipr_get_free_ipr_cmnd - Get a free IPR Cmnd block
701  * @ioa_cfg:    ioa config struct
702  *
703  * Return value:
704  *      pointer to ipr command struct
705  **/
706 static
707 struct ipr_cmnd *__ipr_get_free_ipr_cmnd(struct ipr_hrr_queue *hrrq)
708 {
709         struct ipr_cmnd *ipr_cmd = NULL;
710 
711         if (likely(!list_empty(&hrrq->hrrq_free_q))) {
712                 ipr_cmd = list_entry(hrrq->hrrq_free_q.next,
713                         struct ipr_cmnd, queue);
714                 list_del(&ipr_cmd->queue);
715         }
716 
717 
718         return ipr_cmd;
719 }
720 
721 /**
722  * ipr_get_free_ipr_cmnd - Get a free IPR Cmnd block and initialize it
723  * @ioa_cfg:    ioa config struct
724  *
725  * Return value:
726  *      pointer to ipr command struct
727  **/
728 static
729 struct ipr_cmnd *ipr_get_free_ipr_cmnd(struct ipr_ioa_cfg *ioa_cfg)
730 {
731         struct ipr_cmnd *ipr_cmd =
732                 __ipr_get_free_ipr_cmnd(&ioa_cfg->hrrq[IPR_INIT_HRRQ]);
733         ipr_init_ipr_cmnd(ipr_cmd, ipr_lock_and_done);
734         return ipr_cmd;
735 }
736 
737 /**
738  * ipr_mask_and_clear_interrupts - Mask all and clear specified interrupts
739  * @ioa_cfg:    ioa config struct
740  * @clr_ints:     interrupts to clear
741  *
742  * This function masks all interrupts on the adapter, then clears the
743  * interrupts specified in the mask
744  *
745  * Return value:
746  *      none
747  **/
748 static void ipr_mask_and_clear_interrupts(struct ipr_ioa_cfg *ioa_cfg,
749                                           u32 clr_ints)
750 {
751         volatile u32 int_reg;
752         int i;
753 
754         /* Stop new interrupts */
755         for (i = 0; i < ioa_cfg->hrrq_num; i++) {
756                 spin_lock(&ioa_cfg->hrrq[i]._lock);
757                 ioa_cfg->hrrq[i].allow_interrupts = 0;
758                 spin_unlock(&ioa_cfg->hrrq[i]._lock);
759         }
760         wmb();
761 
762         /* Set interrupt mask to stop all new interrupts */
763         if (ioa_cfg->sis64)
764                 writeq(~0, ioa_cfg->regs.set_interrupt_mask_reg);
765         else
766                 writel(~0, ioa_cfg->regs.set_interrupt_mask_reg);
767 
768         /* Clear any pending interrupts */
769         if (ioa_cfg->sis64)
770                 writel(~0, ioa_cfg->regs.clr_interrupt_reg);
771         writel(clr_ints, ioa_cfg->regs.clr_interrupt_reg32);
772         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
773 }
774 
775 /**
776  * ipr_save_pcix_cmd_reg - Save PCI-X command register
777  * @ioa_cfg:    ioa config struct
778  *
779  * Return value:
780  *      0 on success / -EIO on failure
781  **/
782 static int ipr_save_pcix_cmd_reg(struct ipr_ioa_cfg *ioa_cfg)
783 {
784         int pcix_cmd_reg = pci_find_capability(ioa_cfg->pdev, PCI_CAP_ID_PCIX);
785 
786         if (pcix_cmd_reg == 0)
787                 return 0;
788 
789         if (pci_read_config_word(ioa_cfg->pdev, pcix_cmd_reg + PCI_X_CMD,
790                                  &ioa_cfg->saved_pcix_cmd_reg) != PCIBIOS_SUCCESSFUL) {
791                 dev_err(&ioa_cfg->pdev->dev, "Failed to save PCI-X command register\n");
792                 return -EIO;
793         }
794 
795         ioa_cfg->saved_pcix_cmd_reg |= PCI_X_CMD_DPERR_E | PCI_X_CMD_ERO;
796         return 0;
797 }
798 
799 /**
800  * ipr_set_pcix_cmd_reg - Setup PCI-X command register
801  * @ioa_cfg:    ioa config struct
802  *
803  * Return value:
804  *      0 on success / -EIO on failure
805  **/
806 static int ipr_set_pcix_cmd_reg(struct ipr_ioa_cfg *ioa_cfg)
807 {
808         int pcix_cmd_reg = pci_find_capability(ioa_cfg->pdev, PCI_CAP_ID_PCIX);
809 
810         if (pcix_cmd_reg) {
811                 if (pci_write_config_word(ioa_cfg->pdev, pcix_cmd_reg + PCI_X_CMD,
812                                           ioa_cfg->saved_pcix_cmd_reg) != PCIBIOS_SUCCESSFUL) {
813                         dev_err(&ioa_cfg->pdev->dev, "Failed to setup PCI-X command register\n");
814                         return -EIO;
815                 }
816         }
817 
818         return 0;
819 }
820 
821 /**
822  * ipr_sata_eh_done - done function for aborted SATA commands
823  * @ipr_cmd:    ipr command struct
824  *
825  * This function is invoked for ops generated to SATA
826  * devices which are being aborted.
827  *
828  * Return value:
829  *      none
830  **/
831 static void ipr_sata_eh_done(struct ipr_cmnd *ipr_cmd)
832 {
833         struct ata_queued_cmd *qc = ipr_cmd->qc;
834         struct ipr_sata_port *sata_port = qc->ap->private_data;
835 
836         qc->err_mask |= AC_ERR_OTHER;
837         sata_port->ioasa.status |= ATA_BUSY;
838         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
839         ata_qc_complete(qc);
840 }
841 
842 /**
843  * ipr_scsi_eh_done - mid-layer done function for aborted ops
844  * @ipr_cmd:    ipr command struct
845  *
846  * This function is invoked by the interrupt handler for
847  * ops generated by the SCSI mid-layer which are being aborted.
848  *
849  * Return value:
850  *      none
851  **/
852 static void ipr_scsi_eh_done(struct ipr_cmnd *ipr_cmd)
853 {
854         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
855 
856         scsi_cmd->result |= (DID_ERROR << 16);
857 
858         scsi_dma_unmap(ipr_cmd->scsi_cmd);
859         scsi_cmd->scsi_done(scsi_cmd);
860         if (ipr_cmd->eh_comp)
861                 complete(ipr_cmd->eh_comp);
862         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
863 }
864 
865 /**
866  * ipr_fail_all_ops - Fails all outstanding ops.
867  * @ioa_cfg:    ioa config struct
868  *
869  * This function fails all outstanding ops.
870  *
871  * Return value:
872  *      none
873  **/
874 static void ipr_fail_all_ops(struct ipr_ioa_cfg *ioa_cfg)
875 {
876         struct ipr_cmnd *ipr_cmd, *temp;
877         struct ipr_hrr_queue *hrrq;
878 
879         ENTER;
880         for_each_hrrq(hrrq, ioa_cfg) {
881                 spin_lock(&hrrq->_lock);
882                 list_for_each_entry_safe(ipr_cmd,
883                                         temp, &hrrq->hrrq_pending_q, queue) {
884                         list_del(&ipr_cmd->queue);
885 
886                         ipr_cmd->s.ioasa.hdr.ioasc =
887                                 cpu_to_be32(IPR_IOASC_IOA_WAS_RESET);
888                         ipr_cmd->s.ioasa.hdr.ilid =
889                                 cpu_to_be32(IPR_DRIVER_ILID);
890 
891                         if (ipr_cmd->scsi_cmd)
892                                 ipr_cmd->done = ipr_scsi_eh_done;
893                         else if (ipr_cmd->qc)
894                                 ipr_cmd->done = ipr_sata_eh_done;
895 
896                         ipr_trc_hook(ipr_cmd, IPR_TRACE_FINISH,
897                                      IPR_IOASC_IOA_WAS_RESET);
898                         del_timer(&ipr_cmd->timer);
899                         ipr_cmd->done(ipr_cmd);
900                 }
901                 spin_unlock(&hrrq->_lock);
902         }
903         LEAVE;
904 }
905 
906 /**
907  * ipr_send_command -  Send driver initiated requests.
908  * @ipr_cmd:            ipr command struct
909  *
910  * This function sends a command to the adapter using the correct write call.
911  * In the case of sis64, calculate the ioarcb size required. Then or in the
912  * appropriate bits.
913  *
914  * Return value:
915  *      none
916  **/
917 static void ipr_send_command(struct ipr_cmnd *ipr_cmd)
918 {
919         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
920         dma_addr_t send_dma_addr = ipr_cmd->dma_addr;
921 
922         if (ioa_cfg->sis64) {
923                 /* The default size is 256 bytes */
924                 send_dma_addr |= 0x1;
925 
926                 /* If the number of ioadls * size of ioadl > 128 bytes,
927                    then use a 512 byte ioarcb */
928                 if (ipr_cmd->dma_use_sg * sizeof(struct ipr_ioadl64_desc) > 128 )
929                         send_dma_addr |= 0x4;
930                 writeq(send_dma_addr, ioa_cfg->regs.ioarrin_reg);
931         } else
932                 writel(send_dma_addr, ioa_cfg->regs.ioarrin_reg);
933 }
934 
935 /**
936  * ipr_do_req -  Send driver initiated requests.
937  * @ipr_cmd:            ipr command struct
938  * @done:                       done function
939  * @timeout_func:       timeout function
940  * @timeout:            timeout value
941  *
942  * This function sends the specified command to the adapter with the
943  * timeout given. The done function is invoked on command completion.
944  *
945  * Return value:
946  *      none
947  **/
948 static void ipr_do_req(struct ipr_cmnd *ipr_cmd,
949                        void (*done) (struct ipr_cmnd *),
950                        void (*timeout_func) (struct ipr_cmnd *), u32 timeout)
951 {
952         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
953 
954         ipr_cmd->done = done;
955 
956         ipr_cmd->timer.data = (unsigned long) ipr_cmd;
957         ipr_cmd->timer.expires = jiffies + timeout;
958         ipr_cmd->timer.function = (void (*)(unsigned long))timeout_func;
959 
960         add_timer(&ipr_cmd->timer);
961 
962         ipr_trc_hook(ipr_cmd, IPR_TRACE_START, 0);
963 
964         ipr_send_command(ipr_cmd);
965 }
966 
967 /**
968  * ipr_internal_cmd_done - Op done function for an internally generated op.
969  * @ipr_cmd:    ipr command struct
970  *
971  * This function is the op done function for an internally generated,
972  * blocking op. It simply wakes the sleeping thread.
973  *
974  * Return value:
975  *      none
976  **/
977 static void ipr_internal_cmd_done(struct ipr_cmnd *ipr_cmd)
978 {
979         if (ipr_cmd->sibling)
980                 ipr_cmd->sibling = NULL;
981         else
982                 complete(&ipr_cmd->completion);
983 }
984 
985 /**
986  * ipr_init_ioadl - initialize the ioadl for the correct SIS type
987  * @ipr_cmd:    ipr command struct
988  * @dma_addr:   dma address
989  * @len:        transfer length
990  * @flags:      ioadl flag value
991  *
992  * This function initializes an ioadl in the case where there is only a single
993  * descriptor.
994  *
995  * Return value:
996  *      nothing
997  **/
998 static void ipr_init_ioadl(struct ipr_cmnd *ipr_cmd, dma_addr_t dma_addr,
999                            u32 len, int flags)
1000 {
1001         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
1002         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
1003 
1004         ipr_cmd->dma_use_sg = 1;
1005 
1006         if (ipr_cmd->ioa_cfg->sis64) {
1007                 ioadl64->flags = cpu_to_be32(flags);
1008                 ioadl64->data_len = cpu_to_be32(len);
1009                 ioadl64->address = cpu_to_be64(dma_addr);
1010 
1011                 ipr_cmd->ioarcb.ioadl_len =
1012                         cpu_to_be32(sizeof(struct ipr_ioadl64_desc));
1013                 ipr_cmd->ioarcb.data_transfer_length = cpu_to_be32(len);
1014         } else {
1015                 ioadl->flags_and_data_len = cpu_to_be32(flags | len);
1016                 ioadl->address = cpu_to_be32(dma_addr);
1017 
1018                 if (flags == IPR_IOADL_FLAGS_READ_LAST) {
1019                         ipr_cmd->ioarcb.read_ioadl_len =
1020                                 cpu_to_be32(sizeof(struct ipr_ioadl_desc));
1021                         ipr_cmd->ioarcb.read_data_transfer_length = cpu_to_be32(len);
1022                 } else {
1023                         ipr_cmd->ioarcb.ioadl_len =
1024                                 cpu_to_be32(sizeof(struct ipr_ioadl_desc));
1025                         ipr_cmd->ioarcb.data_transfer_length = cpu_to_be32(len);
1026                 }
1027         }
1028 }
1029 
1030 /**
1031  * ipr_send_blocking_cmd - Send command and sleep on its completion.
1032  * @ipr_cmd:    ipr command struct
1033  * @timeout_func:       function to invoke if command times out
1034  * @timeout:    timeout
1035  *
1036  * Return value:
1037  *      none
1038  **/
1039 static void ipr_send_blocking_cmd(struct ipr_cmnd *ipr_cmd,
1040                                   void (*timeout_func) (struct ipr_cmnd *ipr_cmd),
1041                                   u32 timeout)
1042 {
1043         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
1044 
1045         init_completion(&ipr_cmd->completion);
1046         ipr_do_req(ipr_cmd, ipr_internal_cmd_done, timeout_func, timeout);
1047 
1048         spin_unlock_irq(ioa_cfg->host->host_lock);
1049         wait_for_completion(&ipr_cmd->completion);
1050         spin_lock_irq(ioa_cfg->host->host_lock);
1051 }
1052 
1053 static int ipr_get_hrrq_index(struct ipr_ioa_cfg *ioa_cfg)
1054 {
1055         unsigned int hrrq;
1056 
1057         if (ioa_cfg->hrrq_num == 1)
1058                 hrrq = 0;
1059         else {
1060                 hrrq = atomic_add_return(1, &ioa_cfg->hrrq_index);
1061                 hrrq = (hrrq % (ioa_cfg->hrrq_num - 1)) + 1;
1062         }
1063         return hrrq;
1064 }
1065 
1066 /**
1067  * ipr_send_hcam - Send an HCAM to the adapter.
1068  * @ioa_cfg:    ioa config struct
1069  * @type:               HCAM type
1070  * @hostrcb:    hostrcb struct
1071  *
1072  * This function will send a Host Controlled Async command to the adapter.
1073  * If HCAMs are currently not allowed to be issued to the adapter, it will
1074  * place the hostrcb on the free queue.
1075  *
1076  * Return value:
1077  *      none
1078  **/
1079 static void ipr_send_hcam(struct ipr_ioa_cfg *ioa_cfg, u8 type,
1080                           struct ipr_hostrcb *hostrcb)
1081 {
1082         struct ipr_cmnd *ipr_cmd;
1083         struct ipr_ioarcb *ioarcb;
1084 
1085         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds) {
1086                 ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
1087                 list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
1088                 list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_pending_q);
1089 
1090                 ipr_cmd->u.hostrcb = hostrcb;
1091                 ioarcb = &ipr_cmd->ioarcb;
1092 
1093                 ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
1094                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_HCAM;
1095                 ioarcb->cmd_pkt.cdb[0] = IPR_HOST_CONTROLLED_ASYNC;
1096                 ioarcb->cmd_pkt.cdb[1] = type;
1097                 ioarcb->cmd_pkt.cdb[7] = (sizeof(hostrcb->hcam) >> 8) & 0xff;
1098                 ioarcb->cmd_pkt.cdb[8] = sizeof(hostrcb->hcam) & 0xff;
1099 
1100                 ipr_init_ioadl(ipr_cmd, hostrcb->hostrcb_dma,
1101                                sizeof(hostrcb->hcam), IPR_IOADL_FLAGS_READ_LAST);
1102 
1103                 if (type == IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE)
1104                         ipr_cmd->done = ipr_process_ccn;
1105                 else
1106                         ipr_cmd->done = ipr_process_error;
1107 
1108                 ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_IOA_RES_ADDR);
1109 
1110                 ipr_send_command(ipr_cmd);
1111         } else {
1112                 list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_free_q);
1113         }
1114 }
1115 
1116 /**
1117  * ipr_update_ata_class - Update the ata class in the resource entry
1118  * @res:        resource entry struct
1119  * @proto:      cfgte device bus protocol value
1120  *
1121  * Return value:
1122  *      none
1123  **/
1124 static void ipr_update_ata_class(struct ipr_resource_entry *res, unsigned int proto)
1125 {
1126         switch (proto) {
1127         case IPR_PROTO_SATA:
1128         case IPR_PROTO_SAS_STP:
1129                 res->ata_class = ATA_DEV_ATA;
1130                 break;
1131         case IPR_PROTO_SATA_ATAPI:
1132         case IPR_PROTO_SAS_STP_ATAPI:
1133                 res->ata_class = ATA_DEV_ATAPI;
1134                 break;
1135         default:
1136                 res->ata_class = ATA_DEV_UNKNOWN;
1137                 break;
1138         };
1139 }
1140 
1141 /**
1142  * ipr_init_res_entry - Initialize a resource entry struct.
1143  * @res:        resource entry struct
1144  * @cfgtew:     config table entry wrapper struct
1145  *
1146  * Return value:
1147  *      none
1148  **/
1149 static void ipr_init_res_entry(struct ipr_resource_entry *res,
1150                                struct ipr_config_table_entry_wrapper *cfgtew)
1151 {
1152         int found = 0;
1153         unsigned int proto;
1154         struct ipr_ioa_cfg *ioa_cfg = res->ioa_cfg;
1155         struct ipr_resource_entry *gscsi_res = NULL;
1156 
1157         res->needs_sync_complete = 0;
1158         res->in_erp = 0;
1159         res->add_to_ml = 0;
1160         res->del_from_ml = 0;
1161         res->resetting_device = 0;
1162         res->reset_occurred = 0;
1163         res->sdev = NULL;
1164         res->sata_port = NULL;
1165 
1166         if (ioa_cfg->sis64) {
1167                 proto = cfgtew->u.cfgte64->proto;
1168                 res->flags = be16_to_cpu(cfgtew->u.cfgte64->flags);
1169                 res->res_flags = be16_to_cpu(cfgtew->u.cfgte64->res_flags);
1170                 res->qmodel = IPR_QUEUEING_MODEL64(res);
1171                 res->type = cfgtew->u.cfgte64->res_type;
1172 
1173                 memcpy(res->res_path, &cfgtew->u.cfgte64->res_path,
1174                         sizeof(res->res_path));
1175 
1176                 res->bus = 0;
1177                 memcpy(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1178                         sizeof(res->dev_lun.scsi_lun));
1179                 res->lun = scsilun_to_int(&res->dev_lun);
1180 
1181                 if (res->type == IPR_RES_TYPE_GENERIC_SCSI) {
1182                         list_for_each_entry(gscsi_res, &ioa_cfg->used_res_q, queue) {
1183                                 if (gscsi_res->dev_id == cfgtew->u.cfgte64->dev_id) {
1184                                         found = 1;
1185                                         res->target = gscsi_res->target;
1186                                         break;
1187                                 }
1188                         }
1189                         if (!found) {
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 if (res->type == IPR_RES_TYPE_IOAFP) {
1195                         res->bus = IPR_IOAFP_VIRTUAL_BUS;
1196                         res->target = 0;
1197                 } else if (res->type == IPR_RES_TYPE_ARRAY) {
1198                         res->bus = IPR_ARRAY_VIRTUAL_BUS;
1199                         res->target = find_first_zero_bit(ioa_cfg->array_ids,
1200                                                           ioa_cfg->max_devs_supported);
1201                         set_bit(res->target, ioa_cfg->array_ids);
1202                 } else if (res->type == IPR_RES_TYPE_VOLUME_SET) {
1203                         res->bus = IPR_VSET_VIRTUAL_BUS;
1204                         res->target = find_first_zero_bit(ioa_cfg->vset_ids,
1205                                                           ioa_cfg->max_devs_supported);
1206                         set_bit(res->target, ioa_cfg->vset_ids);
1207                 } else {
1208                         res->target = find_first_zero_bit(ioa_cfg->target_ids,
1209                                                           ioa_cfg->max_devs_supported);
1210                         set_bit(res->target, ioa_cfg->target_ids);
1211                 }
1212         } else {
1213                 proto = cfgtew->u.cfgte->proto;
1214                 res->qmodel = IPR_QUEUEING_MODEL(res);
1215                 res->flags = cfgtew->u.cfgte->flags;
1216                 if (res->flags & IPR_IS_IOA_RESOURCE)
1217                         res->type = IPR_RES_TYPE_IOAFP;
1218                 else
1219                         res->type = cfgtew->u.cfgte->rsvd_subtype & 0x0f;
1220 
1221                 res->bus = cfgtew->u.cfgte->res_addr.bus;
1222                 res->target = cfgtew->u.cfgte->res_addr.target;
1223                 res->lun = cfgtew->u.cfgte->res_addr.lun;
1224                 res->lun_wwn = get_unaligned_be64(cfgtew->u.cfgte->lun_wwn);
1225         }
1226 
1227         ipr_update_ata_class(res, proto);
1228 }
1229 
1230 /**
1231  * ipr_is_same_device - Determine if two devices are the same.
1232  * @res:        resource entry struct
1233  * @cfgtew:     config table entry wrapper struct
1234  *
1235  * Return value:
1236  *      1 if the devices are the same / 0 otherwise
1237  **/
1238 static int ipr_is_same_device(struct ipr_resource_entry *res,
1239                               struct ipr_config_table_entry_wrapper *cfgtew)
1240 {
1241         if (res->ioa_cfg->sis64) {
1242                 if (!memcmp(&res->dev_id, &cfgtew->u.cfgte64->dev_id,
1243                                         sizeof(cfgtew->u.cfgte64->dev_id)) &&
1244                         !memcmp(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1245                                         sizeof(cfgtew->u.cfgte64->lun))) {
1246                         return 1;
1247                 }
1248         } else {
1249                 if (res->bus == cfgtew->u.cfgte->res_addr.bus &&
1250                     res->target == cfgtew->u.cfgte->res_addr.target &&
1251                     res->lun == cfgtew->u.cfgte->res_addr.lun)
1252                         return 1;
1253         }
1254 
1255         return 0;
1256 }
1257 
1258 /**
1259  * __ipr_format_res_path - Format the resource path for printing.
1260  * @res_path:   resource path
1261  * @buf:        buffer
1262  * @len:        length of buffer provided
1263  *
1264  * Return value:
1265  *      pointer to buffer
1266  **/
1267 static char *__ipr_format_res_path(u8 *res_path, char *buffer, int len)
1268 {
1269         int i;
1270         char *p = buffer;
1271 
1272         *p = '\0';
1273         p += snprintf(p, buffer + len - p, "%02X", res_path[0]);
1274         for (i = 1; res_path[i] != 0xff && ((i * 3) < len); i++)
1275                 p += snprintf(p, buffer + len - p, "-%02X", res_path[i]);
1276 
1277         return buffer;
1278 }
1279 
1280 /**
1281  * ipr_format_res_path - Format the resource path for printing.
1282  * @ioa_cfg:    ioa config struct
1283  * @res_path:   resource path
1284  * @buf:        buffer
1285  * @len:        length of buffer provided
1286  *
1287  * Return value:
1288  *      pointer to buffer
1289  **/
1290 static char *ipr_format_res_path(struct ipr_ioa_cfg *ioa_cfg,
1291                                  u8 *res_path, char *buffer, int len)
1292 {
1293         char *p = buffer;
1294 
1295         *p = '\0';
1296         p += snprintf(p, buffer + len - p, "%d/", ioa_cfg->host->host_no);
1297         __ipr_format_res_path(res_path, p, len - (buffer - p));
1298         return buffer;
1299 }
1300 
1301 /**
1302  * ipr_update_res_entry - Update the resource entry.
1303  * @res:        resource entry struct
1304  * @cfgtew:     config table entry wrapper struct
1305  *
1306  * Return value:
1307  *      none
1308  **/
1309 static void ipr_update_res_entry(struct ipr_resource_entry *res,
1310                                  struct ipr_config_table_entry_wrapper *cfgtew)
1311 {
1312         char buffer[IPR_MAX_RES_PATH_LENGTH];
1313         unsigned int proto;
1314         int new_path = 0;
1315 
1316         if (res->ioa_cfg->sis64) {
1317                 res->flags = be16_to_cpu(cfgtew->u.cfgte64->flags);
1318                 res->res_flags = be16_to_cpu(cfgtew->u.cfgte64->res_flags);
1319                 res->type = cfgtew->u.cfgte64->res_type;
1320 
1321                 memcpy(&res->std_inq_data, &cfgtew->u.cfgte64->std_inq_data,
1322                         sizeof(struct ipr_std_inq_data));
1323 
1324                 res->qmodel = IPR_QUEUEING_MODEL64(res);
1325                 proto = cfgtew->u.cfgte64->proto;
1326                 res->res_handle = cfgtew->u.cfgte64->res_handle;
1327                 res->dev_id = cfgtew->u.cfgte64->dev_id;
1328 
1329                 memcpy(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1330                         sizeof(res->dev_lun.scsi_lun));
1331 
1332                 if (memcmp(res->res_path, &cfgtew->u.cfgte64->res_path,
1333                                         sizeof(res->res_path))) {
1334                         memcpy(res->res_path, &cfgtew->u.cfgte64->res_path,
1335                                 sizeof(res->res_path));
1336                         new_path = 1;
1337                 }
1338 
1339                 if (res->sdev && new_path)
1340                         sdev_printk(KERN_INFO, res->sdev, "Resource path: %s\n",
1341                                     ipr_format_res_path(res->ioa_cfg,
1342                                         res->res_path, buffer, sizeof(buffer)));
1343         } else {
1344                 res->flags = cfgtew->u.cfgte->flags;
1345                 if (res->flags & IPR_IS_IOA_RESOURCE)
1346                         res->type = IPR_RES_TYPE_IOAFP;
1347                 else
1348                         res->type = cfgtew->u.cfgte->rsvd_subtype & 0x0f;
1349 
1350                 memcpy(&res->std_inq_data, &cfgtew->u.cfgte->std_inq_data,
1351                         sizeof(struct ipr_std_inq_data));
1352 
1353                 res->qmodel = IPR_QUEUEING_MODEL(res);
1354                 proto = cfgtew->u.cfgte->proto;
1355                 res->res_handle = cfgtew->u.cfgte->res_handle;
1356         }
1357 
1358         ipr_update_ata_class(res, proto);
1359 }
1360 
1361 /**
1362  * ipr_clear_res_target - Clear the bit in the bit map representing the target
1363  *                        for the resource.
1364  * @res:        resource entry struct
1365  * @cfgtew:     config table entry wrapper struct
1366  *
1367  * Return value:
1368  *      none
1369  **/
1370 static void ipr_clear_res_target(struct ipr_resource_entry *res)
1371 {
1372         struct ipr_resource_entry *gscsi_res = NULL;
1373         struct ipr_ioa_cfg *ioa_cfg = res->ioa_cfg;
1374 
1375         if (!ioa_cfg->sis64)
1376                 return;
1377 
1378         if (res->bus == IPR_ARRAY_VIRTUAL_BUS)
1379                 clear_bit(res->target, ioa_cfg->array_ids);
1380         else if (res->bus == IPR_VSET_VIRTUAL_BUS)
1381                 clear_bit(res->target, ioa_cfg->vset_ids);
1382         else if (res->bus == 0 && res->type == IPR_RES_TYPE_GENERIC_SCSI) {
1383                 list_for_each_entry(gscsi_res, &ioa_cfg->used_res_q, queue)
1384                         if (gscsi_res->dev_id == res->dev_id && gscsi_res != res)
1385                                 return;
1386                 clear_bit(res->target, ioa_cfg->target_ids);
1387 
1388         } else if (res->bus == 0)
1389                 clear_bit(res->target, ioa_cfg->target_ids);
1390 }
1391 
1392 /**
1393  * ipr_handle_config_change - Handle a config change from the adapter
1394  * @ioa_cfg:    ioa config struct
1395  * @hostrcb:    hostrcb
1396  *
1397  * Return value:
1398  *      none
1399  **/
1400 static void ipr_handle_config_change(struct ipr_ioa_cfg *ioa_cfg,
1401                                      struct ipr_hostrcb *hostrcb)
1402 {
1403         struct ipr_resource_entry *res = NULL;
1404         struct ipr_config_table_entry_wrapper cfgtew;
1405         __be32 cc_res_handle;
1406 
1407         u32 is_ndn = 1;
1408 
1409         if (ioa_cfg->sis64) {
1410                 cfgtew.u.cfgte64 = &hostrcb->hcam.u.ccn.u.cfgte64;
1411                 cc_res_handle = cfgtew.u.cfgte64->res_handle;
1412         } else {
1413                 cfgtew.u.cfgte = &hostrcb->hcam.u.ccn.u.cfgte;
1414                 cc_res_handle = cfgtew.u.cfgte->res_handle;
1415         }
1416 
1417         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
1418                 if (res->res_handle == cc_res_handle) {
1419                         is_ndn = 0;
1420                         break;
1421                 }
1422         }
1423 
1424         if (is_ndn) {
1425                 if (list_empty(&ioa_cfg->free_res_q)) {
1426                         ipr_send_hcam(ioa_cfg,
1427                                       IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE,
1428                                       hostrcb);
1429                         return;
1430                 }
1431 
1432                 res = list_entry(ioa_cfg->free_res_q.next,
1433                                  struct ipr_resource_entry, queue);
1434 
1435                 list_del(&res->queue);
1436                 ipr_init_res_entry(res, &cfgtew);
1437                 list_add_tail(&res->queue, &ioa_cfg->used_res_q);
1438         }
1439 
1440         ipr_update_res_entry(res, &cfgtew);
1441 
1442         if (hostrcb->hcam.notify_type == IPR_HOST_RCB_NOTIF_TYPE_REM_ENTRY) {
1443                 if (res->sdev) {
1444                         res->del_from_ml = 1;
1445                         res->res_handle = IPR_INVALID_RES_HANDLE;
1446                         schedule_work(&ioa_cfg->work_q);
1447                 } else {
1448                         ipr_clear_res_target(res);
1449                         list_move_tail(&res->queue, &ioa_cfg->free_res_q);
1450                 }
1451         } else if (!res->sdev || res->del_from_ml) {
1452                 res->add_to_ml = 1;
1453                 schedule_work(&ioa_cfg->work_q);
1454         }
1455 
1456         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
1457 }
1458 
1459 /**
1460  * ipr_process_ccn - Op done function for a CCN.
1461  * @ipr_cmd:    ipr command struct
1462  *
1463  * This function is the op done function for a configuration
1464  * change notification host controlled async from the adapter.
1465  *
1466  * Return value:
1467  *      none
1468  **/
1469 static void ipr_process_ccn(struct ipr_cmnd *ipr_cmd)
1470 {
1471         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
1472         struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
1473         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
1474 
1475         list_del(&hostrcb->queue);
1476         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
1477 
1478         if (ioasc) {
1479                 if (ioasc != IPR_IOASC_IOA_WAS_RESET &&
1480                     ioasc != IPR_IOASC_ABORTED_CMD_TERM_BY_HOST)
1481                         dev_err(&ioa_cfg->pdev->dev,
1482                                 "Host RCB failed with IOASC: 0x%08X\n", ioasc);
1483 
1484                 ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
1485         } else {
1486                 ipr_handle_config_change(ioa_cfg, hostrcb);
1487         }
1488 }
1489 
1490 /**
1491  * strip_and_pad_whitespace - Strip and pad trailing whitespace.
1492  * @i:          index into buffer
1493  * @buf:                string to modify
1494  *
1495  * This function will strip all trailing whitespace, pad the end
1496  * of the string with a single space, and NULL terminate the string.
1497  *
1498  * Return value:
1499  *      new length of string
1500  **/
1501 static int strip_and_pad_whitespace(int i, char *buf)
1502 {
1503         while (i && buf[i] == ' ')
1504                 i--;
1505         buf[i+1] = ' ';
1506         buf[i+2] = '\0';
1507         return i + 2;
1508 }
1509 
1510 /**
1511  * ipr_log_vpd_compact - Log the passed extended VPD compactly.
1512  * @prefix:             string to print at start of printk
1513  * @hostrcb:    hostrcb pointer
1514  * @vpd:                vendor/product id/sn struct
1515  *
1516  * Return value:
1517  *      none
1518  **/
1519 static void ipr_log_vpd_compact(char *prefix, struct ipr_hostrcb *hostrcb,
1520                                 struct ipr_vpd *vpd)
1521 {
1522         char buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN + IPR_SERIAL_NUM_LEN + 3];
1523         int i = 0;
1524 
1525         memcpy(buffer, vpd->vpids.vendor_id, IPR_VENDOR_ID_LEN);
1526         i = strip_and_pad_whitespace(IPR_VENDOR_ID_LEN - 1, buffer);
1527 
1528         memcpy(&buffer[i], vpd->vpids.product_id, IPR_PROD_ID_LEN);
1529         i = strip_and_pad_whitespace(i + IPR_PROD_ID_LEN - 1, buffer);
1530 
1531         memcpy(&buffer[i], vpd->sn, IPR_SERIAL_NUM_LEN);
1532         buffer[IPR_SERIAL_NUM_LEN + i] = '\0';
1533 
1534         ipr_hcam_err(hostrcb, "%s VPID/SN: %s\n", prefix, buffer);
1535 }
1536 
1537 /**
1538  * ipr_log_vpd - Log the passed VPD to the error log.
1539  * @vpd:                vendor/product id/sn struct
1540  *
1541  * Return value:
1542  *      none
1543  **/
1544 static void ipr_log_vpd(struct ipr_vpd *vpd)
1545 {
1546         char buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN
1547                     + IPR_SERIAL_NUM_LEN];
1548 
1549         memcpy(buffer, vpd->vpids.vendor_id, IPR_VENDOR_ID_LEN);
1550         memcpy(buffer + IPR_VENDOR_ID_LEN, vpd->vpids.product_id,
1551                IPR_PROD_ID_LEN);
1552         buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN] = '\0';
1553         ipr_err("Vendor/Product ID: %s\n", buffer);
1554 
1555         memcpy(buffer, vpd->sn, IPR_SERIAL_NUM_LEN);
1556         buffer[IPR_SERIAL_NUM_LEN] = '\0';
1557         ipr_err("    Serial Number: %s\n", buffer);
1558 }
1559 
1560 /**
1561  * ipr_log_ext_vpd_compact - Log the passed extended VPD compactly.
1562  * @prefix:             string to print at start of printk
1563  * @hostrcb:    hostrcb pointer
1564  * @vpd:                vendor/product id/sn/wwn struct
1565  *
1566  * Return value:
1567  *      none
1568  **/
1569 static void ipr_log_ext_vpd_compact(char *prefix, struct ipr_hostrcb *hostrcb,
1570                                     struct ipr_ext_vpd *vpd)
1571 {
1572         ipr_log_vpd_compact(prefix, hostrcb, &vpd->vpd);
1573         ipr_hcam_err(hostrcb, "%s WWN: %08X%08X\n", prefix,
1574                      be32_to_cpu(vpd->wwid[0]), be32_to_cpu(vpd->wwid[1]));
1575 }
1576 
1577 /**
1578  * ipr_log_ext_vpd - Log the passed extended VPD to the error log.
1579  * @vpd:                vendor/product id/sn/wwn struct
1580  *
1581  * Return value:
1582  *      none
1583  **/
1584 static void ipr_log_ext_vpd(struct ipr_ext_vpd *vpd)
1585 {
1586         ipr_log_vpd(&vpd->vpd);
1587         ipr_err("    WWN: %08X%08X\n", be32_to_cpu(vpd->wwid[0]),
1588                 be32_to_cpu(vpd->wwid[1]));
1589 }
1590 
1591 /**
1592  * ipr_log_enhanced_cache_error - Log a cache error.
1593  * @ioa_cfg:    ioa config struct
1594  * @hostrcb:    hostrcb struct
1595  *
1596  * Return value:
1597  *      none
1598  **/
1599 static void ipr_log_enhanced_cache_error(struct ipr_ioa_cfg *ioa_cfg,
1600                                          struct ipr_hostrcb *hostrcb)
1601 {
1602         struct ipr_hostrcb_type_12_error *error;
1603 
1604         if (ioa_cfg->sis64)
1605                 error = &hostrcb->hcam.u.error64.u.type_12_error;
1606         else
1607                 error = &hostrcb->hcam.u.error.u.type_12_error;
1608 
1609         ipr_err("-----Current Configuration-----\n");
1610         ipr_err("Cache Directory Card Information:\n");
1611         ipr_log_ext_vpd(&error->ioa_vpd);
1612         ipr_err("Adapter Card Information:\n");
1613         ipr_log_ext_vpd(&error->cfc_vpd);
1614 
1615         ipr_err("-----Expected Configuration-----\n");
1616         ipr_err("Cache Directory Card Information:\n");
1617         ipr_log_ext_vpd(&error->ioa_last_attached_to_cfc_vpd);
1618         ipr_err("Adapter Card Information:\n");
1619         ipr_log_ext_vpd(&error->cfc_last_attached_to_ioa_vpd);
1620 
1621         ipr_err("Additional IOA Data: %08X %08X %08X\n",
1622                      be32_to_cpu(error->ioa_data[0]),
1623                      be32_to_cpu(error->ioa_data[1]),
1624                      be32_to_cpu(error->ioa_data[2]));
1625 }
1626 
1627 /**
1628  * ipr_log_cache_error - Log a cache error.
1629  * @ioa_cfg:    ioa config struct
1630  * @hostrcb:    hostrcb struct
1631  *
1632  * Return value:
1633  *      none
1634  **/
1635 static void ipr_log_cache_error(struct ipr_ioa_cfg *ioa_cfg,
1636                                 struct ipr_hostrcb *hostrcb)
1637 {
1638         struct ipr_hostrcb_type_02_error *error =
1639                 &hostrcb->hcam.u.error.u.type_02_error;
1640 
1641         ipr_err("-----Current Configuration-----\n");
1642         ipr_err("Cache Directory Card Information:\n");
1643         ipr_log_vpd(&error->ioa_vpd);
1644         ipr_err("Adapter Card Information:\n");
1645         ipr_log_vpd(&error->cfc_vpd);
1646 
1647         ipr_err("-----Expected Configuration-----\n");
1648         ipr_err("Cache Directory Card Information:\n");
1649         ipr_log_vpd(&error->ioa_last_attached_to_cfc_vpd);
1650         ipr_err("Adapter Card Information:\n");
1651         ipr_log_vpd(&error->cfc_last_attached_to_ioa_vpd);
1652 
1653         ipr_err("Additional IOA Data: %08X %08X %08X\n",
1654                      be32_to_cpu(error->ioa_data[0]),
1655                      be32_to_cpu(error->ioa_data[1]),
1656                      be32_to_cpu(error->ioa_data[2]));
1657 }
1658 
1659 /**
1660  * ipr_log_enhanced_config_error - Log a configuration error.
1661  * @ioa_cfg:    ioa config struct
1662  * @hostrcb:    hostrcb struct
1663  *
1664  * Return value:
1665  *      none
1666  **/
1667 static void ipr_log_enhanced_config_error(struct ipr_ioa_cfg *ioa_cfg,
1668                                           struct ipr_hostrcb *hostrcb)
1669 {
1670         int errors_logged, i;
1671         struct ipr_hostrcb_device_data_entry_enhanced *dev_entry;
1672         struct ipr_hostrcb_type_13_error *error;
1673 
1674         error = &hostrcb->hcam.u.error.u.type_13_error;
1675         errors_logged = be32_to_cpu(error->errors_logged);
1676 
1677         ipr_err("Device Errors Detected/Logged: %d/%d\n",
1678                 be32_to_cpu(error->errors_detected), errors_logged);
1679 
1680         dev_entry = error->dev;
1681 
1682         for (i = 0; i < errors_logged; i++, dev_entry++) {
1683                 ipr_err_separator;
1684 
1685                 ipr_phys_res_err(ioa_cfg, dev_entry->dev_res_addr, "Device %d", i + 1);
1686                 ipr_log_ext_vpd(&dev_entry->vpd);
1687 
1688                 ipr_err("-----New Device Information-----\n");
1689                 ipr_log_ext_vpd(&dev_entry->new_vpd);
1690 
1691                 ipr_err("Cache Directory Card Information:\n");
1692                 ipr_log_ext_vpd(&dev_entry->ioa_last_with_dev_vpd);
1693 
1694                 ipr_err("Adapter Card Information:\n");
1695                 ipr_log_ext_vpd(&dev_entry->cfc_last_with_dev_vpd);
1696         }
1697 }
1698 
1699 /**
1700  * ipr_log_sis64_config_error - Log a device error.
1701  * @ioa_cfg:    ioa config struct
1702  * @hostrcb:    hostrcb struct
1703  *
1704  * Return value:
1705  *      none
1706  **/
1707 static void ipr_log_sis64_config_error(struct ipr_ioa_cfg *ioa_cfg,
1708                                        struct ipr_hostrcb *hostrcb)
1709 {
1710         int errors_logged, i;
1711         struct ipr_hostrcb64_device_data_entry_enhanced *dev_entry;
1712         struct ipr_hostrcb_type_23_error *error;
1713         char buffer[IPR_MAX_RES_PATH_LENGTH];
1714 
1715         error = &hostrcb->hcam.u.error64.u.type_23_error;
1716         errors_logged = be32_to_cpu(error->errors_logged);
1717 
1718         ipr_err("Device Errors Detected/Logged: %d/%d\n",
1719                 be32_to_cpu(error->errors_detected), errors_logged);
1720 
1721         dev_entry = error->dev;
1722 
1723         for (i = 0; i < errors_logged; i++, dev_entry++) {
1724                 ipr_err_separator;
1725 
1726                 ipr_err("Device %d : %s", i + 1,
1727                         __ipr_format_res_path(dev_entry->res_path,
1728                                               buffer, sizeof(buffer)));
1729                 ipr_log_ext_vpd(&dev_entry->vpd);
1730 
1731                 ipr_err("-----New Device Information-----\n");
1732                 ipr_log_ext_vpd(&dev_entry->new_vpd);
1733 
1734                 ipr_err("Cache Directory Card Information:\n");
1735                 ipr_log_ext_vpd(&dev_entry->ioa_last_with_dev_vpd);
1736 
1737                 ipr_err("Adapter Card Information:\n");
1738                 ipr_log_ext_vpd(&dev_entry->cfc_last_with_dev_vpd);
1739         }
1740 }
1741 
1742 /**
1743  * ipr_log_config_error - Log a configuration error.
1744  * @ioa_cfg:    ioa config struct
1745  * @hostrcb:    hostrcb struct
1746  *
1747  * Return value:
1748  *      none
1749  **/
1750 static void ipr_log_config_error(struct ipr_ioa_cfg *ioa_cfg,
1751                                  struct ipr_hostrcb *hostrcb)
1752 {
1753         int errors_logged, i;
1754         struct ipr_hostrcb_device_data_entry *dev_entry;
1755         struct ipr_hostrcb_type_03_error *error;
1756 
1757         error = &hostrcb->hcam.u.error.u.type_03_error;
1758         errors_logged = be32_to_cpu(error->errors_logged);
1759 
1760         ipr_err("Device Errors Detected/Logged: %d/%d\n",
1761                 be32_to_cpu(error->errors_detected), errors_logged);
1762 
1763         dev_entry = error->dev;
1764 
1765         for (i = 0; i < errors_logged; i++, dev_entry++) {
1766                 ipr_err_separator;
1767 
1768                 ipr_phys_res_err(ioa_cfg, dev_entry->dev_res_addr, "Device %d", i + 1);
1769                 ipr_log_vpd(&dev_entry->vpd);
1770 
1771                 ipr_err("-----New Device Information-----\n");
1772                 ipr_log_vpd(&dev_entry->new_vpd);
1773 
1774                 ipr_err("Cache Directory Card Information:\n");
1775                 ipr_log_vpd(&dev_entry->ioa_last_with_dev_vpd);
1776 
1777                 ipr_err("Adapter Card Information:\n");
1778                 ipr_log_vpd(&dev_entry->cfc_last_with_dev_vpd);
1779 
1780                 ipr_err("Additional IOA Data: %08X %08X %08X %08X %08X\n",
1781                         be32_to_cpu(dev_entry->ioa_data[0]),
1782                         be32_to_cpu(dev_entry->ioa_data[1]),
1783                         be32_to_cpu(dev_entry->ioa_data[2]),
1784                         be32_to_cpu(dev_entry->ioa_data[3]),
1785                         be32_to_cpu(dev_entry->ioa_data[4]));
1786         }
1787 }
1788 
1789 /**
1790  * ipr_log_enhanced_array_error - Log an array configuration error.
1791  * @ioa_cfg:    ioa config struct
1792  * @hostrcb:    hostrcb struct
1793  *
1794  * Return value:
1795  *      none
1796  **/
1797 static void ipr_log_enhanced_array_error(struct ipr_ioa_cfg *ioa_cfg,
1798                                          struct ipr_hostrcb *hostrcb)
1799 {
1800         int i, num_entries;
1801         struct ipr_hostrcb_type_14_error *error;
1802         struct ipr_hostrcb_array_data_entry_enhanced *array_entry;
1803         const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '' };
1804 
1805         error = &hostrcb->hcam.u.error.u.type_14_error;
1806 
1807         ipr_err_separator;
1808 
1809         ipr_err("RAID %s Array Configuration: %d:%d:%d:%d\n",
1810                 error->protection_level,
1811                 ioa_cfg->host->host_no,
1812                 error->last_func_vset_res_addr.bus,
1813                 error->last_func_vset_res_addr.target,
1814                 error->last_func_vset_res_addr.lun);
1815 
1816         ipr_err_separator;
1817 
1818         array_entry = error->array_member;
1819         num_entries = min_t(u32, be32_to_cpu(error->num_entries),
1820                             ARRAY_SIZE(error->array_member));
1821 
1822         for (i = 0; i < num_entries; i++, array_entry++) {
1823                 if (!memcmp(array_entry->vpd.vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
1824                         continue;
1825 
1826                 if (be32_to_cpu(error->exposed_mode_adn) == i)
1827                         ipr_err("Exposed Array Member %d:\n", i);
1828                 else
1829                         ipr_err("Array Member %d:\n", i);
1830 
1831                 ipr_log_ext_vpd(&array_entry->vpd);
1832                 ipr_phys_res_err(ioa_cfg, array_entry->dev_res_addr, "Current Location");
1833                 ipr_phys_res_err(ioa_cfg, array_entry->expected_dev_res_addr,
1834                                  "Expected Location");
1835 
1836                 ipr_err_separator;
1837         }
1838 }
1839 
1840 /**
1841  * ipr_log_array_error - Log an array configuration error.
1842  * @ioa_cfg:    ioa config struct
1843  * @hostrcb:    hostrcb struct
1844  *
1845  * Return value:
1846  *      none
1847  **/
1848 static void ipr_log_array_error(struct ipr_ioa_cfg *ioa_cfg,
1849                                 struct ipr_hostrcb *hostrcb)
1850 {
1851         int i;
1852         struct ipr_hostrcb_type_04_error *error;
1853         struct ipr_hostrcb_array_data_entry *array_entry;
1854         const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '' };
1855 
1856         error = &hostrcb->hcam.u.error.u.type_04_error;
1857 
1858         ipr_err_separator;
1859 
1860         ipr_err("RAID %s Array Configuration: %d:%d:%d:%d\n",
1861                 error->protection_level,
1862                 ioa_cfg->host->host_no,
1863                 error->last_func_vset_res_addr.bus,
1864                 error->last_func_vset_res_addr.target,
1865                 error->last_func_vset_res_addr.lun);
1866 
1867         ipr_err_separator;
1868 
1869         array_entry = error->array_member;
1870 
1871         for (i = 0; i < 18; i++) {
1872                 if (!memcmp(array_entry->vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
1873                         continue;
1874 
1875                 if (be32_to_cpu(error->exposed_mode_adn) == i)
1876                         ipr_err("Exposed Array Member %d:\n", i);
1877                 else
1878                         ipr_err("Array Member %d:\n", i);
1879 
1880                 ipr_log_vpd(&array_entry->vpd);
1881 
1882                 ipr_phys_res_err(ioa_cfg, array_entry->dev_res_addr, "Current Location");
1883                 ipr_phys_res_err(ioa_cfg, array_entry->expected_dev_res_addr,
1884                                  "Expected Location");
1885 
1886                 ipr_err_separator;
1887 
1888                 if (i == 9)
1889                         array_entry = error->array_member2;
1890                 else
1891                         array_entry++;
1892         }
1893 }
1894 
1895 /**
1896  * ipr_log_hex_data - Log additional hex IOA error data.
1897  * @ioa_cfg:    ioa config struct
1898  * @data:               IOA error data
1899  * @len:                data length
1900  *
1901  * Return value:
1902  *      none
1903  **/
1904 static void ipr_log_hex_data(struct ipr_ioa_cfg *ioa_cfg, __be32 *data, int len)
1905 {
1906         int i;
1907 
1908         if (len == 0)
1909                 return;
1910 
1911         if (ioa_cfg->log_level <= IPR_DEFAULT_LOG_LEVEL)
1912                 len = min_t(int, len, IPR_DEFAULT_MAX_ERROR_DUMP);
1913 
1914         for (i = 0; i < len / 4; i += 4) {
1915                 ipr_err("%08X: %08X %08X %08X %08X\n", i*4,
1916                         be32_to_cpu(data[i]),
1917                         be32_to_cpu(data[i+1]),
1918                         be32_to_cpu(data[i+2]),
1919                         be32_to_cpu(data[i+3]));
1920         }
1921 }
1922 
1923 /**
1924  * ipr_log_enhanced_dual_ioa_error - Log an enhanced dual adapter error.
1925  * @ioa_cfg:    ioa config struct
1926  * @hostrcb:    hostrcb struct
1927  *
1928  * Return value:
1929  *      none
1930  **/
1931 static void ipr_log_enhanced_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
1932                                             struct ipr_hostrcb *hostrcb)
1933 {
1934         struct ipr_hostrcb_type_17_error *error;
1935 
1936         if (ioa_cfg->sis64)
1937                 error = &hostrcb->hcam.u.error64.u.type_17_error;
1938         else
1939                 error = &hostrcb->hcam.u.error.u.type_17_error;
1940 
1941         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
1942         strim(error->failure_reason);
1943 
1944         ipr_hcam_err(hostrcb, "%s [PRC: %08X]\n", error->failure_reason,
1945                      be32_to_cpu(hostrcb->hcam.u.error.prc));
1946         ipr_log_ext_vpd_compact("Remote IOA", hostrcb, &error->vpd);
1947         ipr_log_hex_data(ioa_cfg, error->data,
1948                          be32_to_cpu(hostrcb->hcam.length) -
1949                          (offsetof(struct ipr_hostrcb_error, u) +
1950                           offsetof(struct ipr_hostrcb_type_17_error, data)));
1951 }
1952 
1953 /**
1954  * ipr_log_dual_ioa_error - Log a dual adapter error.
1955  * @ioa_cfg:    ioa config struct
1956  * @hostrcb:    hostrcb struct
1957  *
1958  * Return value:
1959  *      none
1960  **/
1961 static void ipr_log_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
1962                                    struct ipr_hostrcb *hostrcb)
1963 {
1964         struct ipr_hostrcb_type_07_error *error;
1965 
1966         error = &hostrcb->hcam.u.error.u.type_07_error;
1967         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
1968         strim(error->failure_reason);
1969 
1970         ipr_hcam_err(hostrcb, "%s [PRC: %08X]\n", error->failure_reason,
1971                      be32_to_cpu(hostrcb->hcam.u.error.prc));
1972         ipr_log_vpd_compact("Remote IOA", hostrcb, &error->vpd);
1973         ipr_log_hex_data(ioa_cfg, error->data,
1974                          be32_to_cpu(hostrcb->hcam.length) -
1975                          (offsetof(struct ipr_hostrcb_error, u) +
1976                           offsetof(struct ipr_hostrcb_type_07_error, data)));
1977 }
1978 
1979 static const struct {
1980         u8 active;
1981         char *desc;
1982 } path_active_desc[] = {
1983         { IPR_PATH_NO_INFO, "Path" },
1984         { IPR_PATH_ACTIVE, "Active path" },
1985         { IPR_PATH_NOT_ACTIVE, "Inactive path" }
1986 };
1987 
1988 static const struct {
1989         u8 state;
1990         char *desc;
1991 } path_state_desc[] = {
1992         { IPR_PATH_STATE_NO_INFO, "has no path state information available" },
1993         { IPR_PATH_HEALTHY, "is healthy" },
1994         { IPR_PATH_DEGRADED, "is degraded" },
1995         { IPR_PATH_FAILED, "is failed" }
1996 };
1997 
1998 /**
1999  * ipr_log_fabric_path - Log a fabric path error
2000  * @hostrcb:    hostrcb struct
2001  * @fabric:             fabric descriptor
2002  *
2003  * Return value:
2004  *      none
2005  **/
2006 static void ipr_log_fabric_path(struct ipr_hostrcb *hostrcb,
2007                                 struct ipr_hostrcb_fabric_desc *fabric)
2008 {
2009         int i, j;
2010         u8 path_state = fabric->path_state;
2011         u8 active = path_state & IPR_PATH_ACTIVE_MASK;
2012         u8 state = path_state & IPR_PATH_STATE_MASK;
2013 
2014         for (i = 0; i < ARRAY_SIZE(path_active_desc); i++) {
2015                 if (path_active_desc[i].active != active)
2016                         continue;
2017 
2018                 for (j = 0; j < ARRAY_SIZE(path_state_desc); j++) {
2019                         if (path_state_desc[j].state != state)
2020                                 continue;
2021 
2022                         if (fabric->cascaded_expander == 0xff && fabric->phy == 0xff) {
2023                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d\n",
2024                                              path_active_desc[i].desc, path_state_desc[j].desc,
2025                                              fabric->ioa_port);
2026                         } else if (fabric->cascaded_expander == 0xff) {
2027                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Phy=%d\n",
2028                                              path_active_desc[i].desc, path_state_desc[j].desc,
2029                                              fabric->ioa_port, fabric->phy);
2030                         } else if (fabric->phy == 0xff) {
2031                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d\n",
2032                                              path_active_desc[i].desc, path_state_desc[j].desc,
2033                                              fabric->ioa_port, fabric->cascaded_expander);
2034                         } else {
2035                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d, Phy=%d\n",
2036                                              path_active_desc[i].desc, path_state_desc[j].desc,
2037                                              fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
2038                         }
2039                         return;
2040                 }
2041         }
2042 
2043         ipr_err("Path state=%02X IOA Port=%d Cascade=%d Phy=%d\n", path_state,
2044                 fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
2045 }
2046 
2047 /**
2048  * ipr_log64_fabric_path - Log a fabric path error
2049  * @hostrcb:    hostrcb struct
2050  * @fabric:             fabric descriptor
2051  *
2052  * Return value:
2053  *      none
2054  **/
2055 static void ipr_log64_fabric_path(struct ipr_hostrcb *hostrcb,
2056                                   struct ipr_hostrcb64_fabric_desc *fabric)
2057 {
2058         int i, j;
2059         u8 path_state = fabric->path_state;
2060         u8 active = path_state & IPR_PATH_ACTIVE_MASK;
2061         u8 state = path_state & IPR_PATH_STATE_MASK;
2062         char buffer[IPR_MAX_RES_PATH_LENGTH];
2063 
2064         for (i = 0; i < ARRAY_SIZE(path_active_desc); i++) {
2065                 if (path_active_desc[i].active != active)
2066                         continue;
2067 
2068                 for (j = 0; j < ARRAY_SIZE(path_state_desc); j++) {
2069                         if (path_state_desc[j].state != state)
2070                                 continue;
2071 
2072                         ipr_hcam_err(hostrcb, "%s %s: Resource Path=%s\n",
2073                                      path_active_desc[i].desc, path_state_desc[j].desc,
2074                                      ipr_format_res_path(hostrcb->ioa_cfg,
2075                                                 fabric->res_path,
2076                                                 buffer, sizeof(buffer)));
2077                         return;
2078                 }
2079         }
2080 
2081         ipr_err("Path state=%02X Resource Path=%s\n", path_state,
2082                 ipr_format_res_path(hostrcb->ioa_cfg, fabric->res_path,
2083                                     buffer, sizeof(buffer)));
2084 }
2085 
2086 static const struct {
2087         u8 type;
2088         char *desc;
2089 } path_type_desc[] = {
2090         { IPR_PATH_CFG_IOA_PORT, "IOA port" },
2091         { IPR_PATH_CFG_EXP_PORT, "Expander port" },
2092         { IPR_PATH_CFG_DEVICE_PORT, "Device port" },
2093         { IPR_PATH_CFG_DEVICE_LUN, "Device LUN" }
2094 };
2095 
2096 static const struct {
2097         u8 status;
2098         char *desc;
2099 } path_status_desc[] = {
2100         { IPR_PATH_CFG_NO_PROB, "Functional" },
2101         { IPR_PATH_CFG_DEGRADED, "Degraded" },
2102         { IPR_PATH_CFG_FAILED, "Failed" },
2103         { IPR_PATH_CFG_SUSPECT, "Suspect" },
2104         { IPR_PATH_NOT_DETECTED, "Missing" },
2105         { IPR_PATH_INCORRECT_CONN, "Incorrectly connected" }
2106 };
2107 
2108 static const char *link_rate[] = {
2109         "unknown",
2110         "disabled",
2111         "phy reset problem",
2112         "spinup hold",
2113         "port selector",
2114         "unknown",
2115         "unknown",
2116         "unknown",
2117         "1.5Gbps",
2118         "3.0Gbps",
2119         "unknown",
2120         "unknown",
2121         "unknown",
2122         "unknown",
2123         "unknown",
2124         "unknown"
2125 };
2126 
2127 /**
2128  * ipr_log_path_elem - Log a fabric path element.
2129  * @hostrcb:    hostrcb struct
2130  * @cfg:                fabric path element struct
2131  *
2132  * Return value:
2133  *      none
2134  **/
2135 static void ipr_log_path_elem(struct ipr_hostrcb *hostrcb,
2136                               struct ipr_hostrcb_config_element *cfg)
2137 {
2138         int i, j;
2139         u8 type = cfg->type_status & IPR_PATH_CFG_TYPE_MASK;
2140         u8 status = cfg->type_status & IPR_PATH_CFG_STATUS_MASK;
2141 
2142         if (type == IPR_PATH_CFG_NOT_EXIST)
2143                 return;
2144 
2145         for (i = 0; i < ARRAY_SIZE(path_type_desc); i++) {
2146                 if (path_type_desc[i].type != type)
2147                         continue;
2148 
2149                 for (j = 0; j < ARRAY_SIZE(path_status_desc); j++) {
2150                         if (path_status_desc[j].status != status)
2151                                 continue;
2152 
2153                         if (type == IPR_PATH_CFG_IOA_PORT) {
2154                                 ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, WWN=%08X%08X\n",
2155                                              path_status_desc[j].desc, path_type_desc[i].desc,
2156                                              cfg->phy, link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2157                                              be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2158                         } else {
2159                                 if (cfg->cascaded_expander == 0xff && cfg->phy == 0xff) {
2160                                         ipr_hcam_err(hostrcb, "%s %s: Link rate=%s, WWN=%08X%08X\n",
2161                                                      path_status_desc[j].desc, path_type_desc[i].desc,
2162                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2163                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2164                                 } else if (cfg->cascaded_expander == 0xff) {
2165                                         ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, "
2166                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
2167                                                      path_type_desc[i].desc, cfg->phy,
2168                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2169                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2170                                 } else if (cfg->phy == 0xff) {
2171                                         ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Link rate=%s, "
2172                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
2173                                                      path_type_desc[i].desc, cfg->cascaded_expander,
2174                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2175                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2176                                 } else {
2177                                         ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Phy=%d, Link rate=%s "
2178                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
2179                                                      path_type_desc[i].desc, cfg->cascaded_expander, cfg->phy,
2180                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2181                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2182                                 }
2183                         }
2184                         return;
2185                 }
2186         }
2187 
2188         ipr_hcam_err(hostrcb, "Path element=%02X: Cascade=%d Phy=%d Link rate=%s "
2189                      "WWN=%08X%08X\n", cfg->type_status, cfg->cascaded_expander, cfg->phy,
2190                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2191                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2192 }
2193 
2194 /**
2195  * ipr_log64_path_elem - Log a fabric path element.
2196  * @hostrcb:    hostrcb struct
2197  * @cfg:                fabric path element struct
2198  *
2199  * Return value:
2200  *      none
2201  **/
2202 static void ipr_log64_path_elem(struct ipr_hostrcb *hostrcb,
2203                                 struct ipr_hostrcb64_config_element *cfg)
2204 {
2205         int i, j;
2206         u8 desc_id = cfg->descriptor_id & IPR_DESCRIPTOR_MASK;
2207         u8 type = cfg->type_status & IPR_PATH_CFG_TYPE_MASK;
2208         u8 status = cfg->type_status & IPR_PATH_CFG_STATUS_MASK;
2209         char buffer[IPR_MAX_RES_PATH_LENGTH];
2210 
2211         if (type == IPR_PATH_CFG_NOT_EXIST || desc_id != IPR_DESCRIPTOR_SIS64)
2212                 return;
2213 
2214         for (i = 0; i < ARRAY_SIZE(path_type_desc); i++) {
2215                 if (path_type_desc[i].type != type)
2216                         continue;
2217 
2218                 for (j = 0; j < ARRAY_SIZE(path_status_desc); j++) {
2219                         if (path_status_desc[j].status != status)
2220                                 continue;
2221 
2222                         ipr_hcam_err(hostrcb, "%s %s: Resource Path=%s, Link rate=%s, WWN=%08X%08X\n",
2223                                      path_status_desc[j].desc, path_type_desc[i].desc,
2224                                      ipr_format_res_path(hostrcb->ioa_cfg,
2225                                         cfg->res_path, buffer, sizeof(buffer)),
2226                                         link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2227                                         be32_to_cpu(cfg->wwid[0]),
2228                                         be32_to_cpu(cfg->wwid[1]));
2229                         return;
2230                 }
2231         }
2232         ipr_hcam_err(hostrcb, "Path element=%02X: Resource Path=%s, Link rate=%s "
2233                      "WWN=%08X%08X\n", cfg->type_status,
2234                      ipr_format_res_path(hostrcb->ioa_cfg,
2235                         cfg->res_path, buffer, sizeof(buffer)),
2236                         link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2237                         be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2238 }
2239 
2240 /**
2241  * ipr_log_fabric_error - Log a fabric error.
2242  * @ioa_cfg:    ioa config struct
2243  * @hostrcb:    hostrcb struct
2244  *
2245  * Return value:
2246  *      none
2247  **/
2248 static void ipr_log_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
2249                                  struct ipr_hostrcb *hostrcb)
2250 {
2251         struct ipr_hostrcb_type_20_error *error;
2252         struct ipr_hostrcb_fabric_desc *fabric;
2253         struct ipr_hostrcb_config_element *cfg;
2254         int i, add_len;
2255 
2256         error = &hostrcb->hcam.u.error.u.type_20_error;
2257         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
2258         ipr_hcam_err(hostrcb, "%s\n", error->failure_reason);
2259 
2260         add_len = be32_to_cpu(hostrcb->hcam.length) -
2261                 (offsetof(struct ipr_hostrcb_error, u) +
2262                  offsetof(struct ipr_hostrcb_type_20_error, desc));
2263 
2264         for (i = 0, fabric = error->desc; i < error->num_entries; i++) {
2265                 ipr_log_fabric_path(hostrcb, fabric);
2266                 for_each_fabric_cfg(fabric, cfg)
2267                         ipr_log_path_elem(hostrcb, cfg);
2268 
2269                 add_len -= be16_to_cpu(fabric->length);
2270                 fabric = (struct ipr_hostrcb_fabric_desc *)
2271                         ((unsigned long)fabric + be16_to_cpu(fabric->length));
2272         }
2273 
2274         ipr_log_hex_data(ioa_cfg, (__be32 *)fabric, add_len);
2275 }
2276 
2277 /**
2278  * ipr_log_sis64_array_error - Log a sis64 array error.
2279  * @ioa_cfg:    ioa config struct
2280  * @hostrcb:    hostrcb struct
2281  *
2282  * Return value:
2283  *      none
2284  **/
2285 static void ipr_log_sis64_array_error(struct ipr_ioa_cfg *ioa_cfg,
2286                                       struct ipr_hostrcb *hostrcb)
2287 {
2288         int i, num_entries;
2289         struct ipr_hostrcb_type_24_error *error;
2290         struct ipr_hostrcb64_array_data_entry *array_entry;
2291         char buffer[IPR_MAX_RES_PATH_LENGTH];
2292         const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '' };
2293 
2294         error = &hostrcb->hcam.u.error64.u.type_24_error;
2295 
2296         ipr_err_separator;
2297 
2298         ipr_err("RAID %s Array Configuration: %s\n",
2299                 error->protection_level,
2300                 ipr_format_res_path(ioa_cfg, error->last_res_path,
2301                         buffer, sizeof(buffer)));
2302 
2303         ipr_err_separator;
2304 
2305         array_entry = error->array_member;
2306         num_entries = min_t(u32, error->num_entries,
2307                             ARRAY_SIZE(error->array_member));
2308 
2309         for (i = 0; i < num_entries; i++, array_entry++) {
2310 
2311                 if (!memcmp(array_entry->vpd.vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
2312                         continue;
2313 
2314                 if (error->exposed_mode_adn == i)
2315                         ipr_err("Exposed Array Member %d:\n", i);
2316                 else
2317                         ipr_err("Array Member %d:\n", i);
2318 
2319                 ipr_err("Array Member %d:\n", i);
2320                 ipr_log_ext_vpd(&array_entry->vpd);
2321                 ipr_err("Current Location: %s\n",
2322                          ipr_format_res_path(ioa_cfg, array_entry->res_path,
2323                                 buffer, sizeof(buffer)));
2324                 ipr_err("Expected Location: %s\n",
2325                          ipr_format_res_path(ioa_cfg,
2326                                 array_entry->expected_res_path,
2327                                 buffer, sizeof(buffer)));
2328 
2329                 ipr_err_separator;
2330         }
2331 }
2332 
2333 /**
2334  * ipr_log_sis64_fabric_error - Log a sis64 fabric error.
2335  * @ioa_cfg:    ioa config struct
2336  * @hostrcb:    hostrcb struct
2337  *
2338  * Return value:
2339  *      none
2340  **/
2341 static void ipr_log_sis64_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
2342                                        struct ipr_hostrcb *hostrcb)
2343 {
2344         struct ipr_hostrcb_type_30_error *error;
2345         struct ipr_hostrcb64_fabric_desc *fabric;
2346         struct ipr_hostrcb64_config_element *cfg;
2347         int i, add_len;
2348 
2349         error = &hostrcb->hcam.u.error64.u.type_30_error;
2350 
2351         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
2352         ipr_hcam_err(hostrcb, "%s\n", error->failure_reason);
2353 
2354         add_len = be32_to_cpu(hostrcb->hcam.length) -
2355                 (offsetof(struct ipr_hostrcb64_error, u) +
2356                  offsetof(struct ipr_hostrcb_type_30_error, desc));
2357 
2358         for (i = 0, fabric = error->desc; i < error->num_entries; i++) {
2359                 ipr_log64_fabric_path(hostrcb, fabric);
2360                 for_each_fabric_cfg(fabric, cfg)
2361                         ipr_log64_path_elem(hostrcb, cfg);
2362 
2363                 add_len -= be16_to_cpu(fabric->length);
2364                 fabric = (struct ipr_hostrcb64_fabric_desc *)
2365                         ((unsigned long)fabric + be16_to_cpu(fabric->length));
2366         }
2367 
2368         ipr_log_hex_data(ioa_cfg, (__be32 *)fabric, add_len);
2369 }
2370 
2371 /**
2372  * ipr_log_generic_error - Log an adapter error.
2373  * @ioa_cfg:    ioa config struct
2374  * @hostrcb:    hostrcb struct
2375  *
2376  * Return value:
2377  *      none
2378  **/
2379 static void ipr_log_generic_error(struct ipr_ioa_cfg *ioa_cfg,
2380                                   struct ipr_hostrcb *hostrcb)
2381 {
2382         ipr_log_hex_data(ioa_cfg, hostrcb->hcam.u.raw.data,
2383                          be32_to_cpu(hostrcb->hcam.length));
2384 }
2385 
2386 /**
2387  * ipr_log_sis64_device_error - Log a cache error.
2388  * @ioa_cfg:    ioa config struct
2389  * @hostrcb:    hostrcb struct
2390  *
2391  * Return value:
2392  *      none
2393  **/
2394 static void ipr_log_sis64_device_error(struct ipr_ioa_cfg *ioa_cfg,
2395                                          struct ipr_hostrcb *hostrcb)
2396 {
2397         struct ipr_hostrcb_type_21_error *error;
2398         char buffer[IPR_MAX_RES_PATH_LENGTH];
2399 
2400         error = &hostrcb->hcam.u.error64.u.type_21_error;
2401 
2402         ipr_err("-----Failing Device Information-----\n");
2403         ipr_err("World Wide Unique ID: %08X%08X%08X%08X\n",
2404                 be32_to_cpu(error->wwn[0]), be32_to_cpu(error->wwn[1]),
2405                  be32_to_cpu(error->wwn[2]), be32_to_cpu(error->wwn[3]));
2406         ipr_err("Device Resource Path: %s\n",
2407                 __ipr_format_res_path(error->res_path,
2408                                       buffer, sizeof(buffer)));
2409         error->primary_problem_desc[sizeof(error->primary_problem_desc) - 1] = '\0';
2410         error->second_problem_desc[sizeof(error->second_problem_desc) - 1] = '\0';
2411         ipr_err("Primary Problem Description: %s\n", error->primary_problem_desc);
2412         ipr_err("Secondary Problem Description:  %s\n", error->second_problem_desc);
2413         ipr_err("SCSI Sense Data:\n");
2414         ipr_log_hex_data(ioa_cfg, error->sense_data, sizeof(error->sense_data));
2415         ipr_err("SCSI Command Descriptor Block: \n");
2416         ipr_log_hex_data(ioa_cfg, error->cdb, sizeof(error->cdb));
2417 
2418         ipr_err("Additional IOA Data:\n");
2419         ipr_log_hex_data(ioa_cfg, error->ioa_data, be32_to_cpu(error->length_of_error));
2420 }
2421 
2422 /**
2423  * ipr_get_error - Find the specfied IOASC in the ipr_error_table.
2424  * @ioasc:      IOASC
2425  *
2426  * This function will return the index of into the ipr_error_table
2427  * for the specified IOASC. If the IOASC is not in the table,
2428  * 0 will be returned, which points to the entry used for unknown errors.
2429  *
2430  * Return value:
2431  *      index into the ipr_error_table
2432  **/
2433 static u32 ipr_get_error(u32 ioasc)
2434 {
2435         int i;
2436 
2437         for (i = 0; i < ARRAY_SIZE(ipr_error_table); i++)
2438                 if (ipr_error_table[i].ioasc == (ioasc & IPR_IOASC_IOASC_MASK))
2439                         return i;
2440 
2441         return 0;
2442 }
2443 
2444 /**
2445  * ipr_handle_log_data - Log an adapter error.
2446  * @ioa_cfg:    ioa config struct
2447  * @hostrcb:    hostrcb struct
2448  *
2449  * This function logs an adapter error to the system.
2450  *
2451  * Return value:
2452  *      none
2453  **/
2454 static void ipr_handle_log_data(struct ipr_ioa_cfg *ioa_cfg,
2455                                 struct ipr_hostrcb *hostrcb)
2456 {
2457         u32 ioasc;
2458         int error_index;
2459         struct ipr_hostrcb_type_21_error *error;
2460 
2461         if (hostrcb->hcam.notify_type != IPR_HOST_RCB_NOTIF_TYPE_ERROR_LOG_ENTRY)
2462                 return;
2463 
2464         if (hostrcb->hcam.notifications_lost == IPR_HOST_RCB_NOTIFICATIONS_LOST)
2465                 dev_err(&ioa_cfg->pdev->dev, "Error notifications lost\n");
2466 
2467         if (ioa_cfg->sis64)
2468                 ioasc = be32_to_cpu(hostrcb->hcam.u.error64.fd_ioasc);
2469         else
2470                 ioasc = be32_to_cpu(hostrcb->hcam.u.error.fd_ioasc);
2471 
2472         if (!ioa_cfg->sis64 && (ioasc == IPR_IOASC_BUS_WAS_RESET ||
2473             ioasc == IPR_IOASC_BUS_WAS_RESET_BY_OTHER)) {
2474                 /* Tell the midlayer we had a bus reset so it will handle the UA properly */
2475                 scsi_report_bus_reset(ioa_cfg->host,
2476                                       hostrcb->hcam.u.error.fd_res_addr.bus);
2477         }
2478 
2479         error_index = ipr_get_error(ioasc);
2480 
2481         if (!ipr_error_table[error_index].log_hcam)
2482                 return;
2483 
2484         if (ioasc == IPR_IOASC_HW_CMD_FAILED &&
2485             hostrcb->hcam.overlay_id == IPR_HOST_RCB_OVERLAY_ID_21) {
2486                 error = &hostrcb->hcam.u.error64.u.type_21_error;
2487 
2488                 if (((be32_to_cpu(error->sense_data[0]) & 0x0000ff00) >> 8) == ILLEGAL_REQUEST &&
2489                         ioa_cfg->log_level <= IPR_DEFAULT_LOG_LEVEL)
2490                                 return;
2491         }
2492 
2493         ipr_hcam_err(hostrcb, "%s\n", ipr_error_table[error_index].error);
2494 
2495         /* Set indication we have logged an error */
2496         ioa_cfg->errors_logged++;
2497 
2498         if (ioa_cfg->log_level < ipr_error_table[error_index].log_hcam)
2499                 return;
2500         if (be32_to_cpu(hostrcb->hcam.length) > sizeof(hostrcb->hcam.u.raw))
2501                 hostrcb->hcam.length = cpu_to_be32(sizeof(hostrcb->hcam.u.raw));
2502 
2503         switch (hostrcb->hcam.overlay_id) {
2504         case IPR_HOST_RCB_OVERLAY_ID_2:
2505                 ipr_log_cache_error(ioa_cfg, hostrcb);
2506                 break;
2507         case IPR_HOST_RCB_OVERLAY_ID_3:
2508                 ipr_log_config_error(ioa_cfg, hostrcb);
2509                 break;
2510         case IPR_HOST_RCB_OVERLAY_ID_4:
2511         case IPR_HOST_RCB_OVERLAY_ID_6:
2512                 ipr_log_array_error(ioa_cfg, hostrcb);
2513                 break;
2514         case IPR_HOST_RCB_OVERLAY_ID_7:
2515                 ipr_log_dual_ioa_error(ioa_cfg, hostrcb);
2516                 break;
2517         case IPR_HOST_RCB_OVERLAY_ID_12:
2518                 ipr_log_enhanced_cache_error(ioa_cfg, hostrcb);
2519                 break;
2520         case IPR_HOST_RCB_OVERLAY_ID_13:
2521                 ipr_log_enhanced_config_error(ioa_cfg, hostrcb);
2522                 break;
2523         case IPR_HOST_RCB_OVERLAY_ID_14:
2524         case IPR_HOST_RCB_OVERLAY_ID_16:
2525                 ipr_log_enhanced_array_error(ioa_cfg, hostrcb);
2526                 break;
2527         case IPR_HOST_RCB_OVERLAY_ID_17:
2528                 ipr_log_enhanced_dual_ioa_error(ioa_cfg, hostrcb);
2529                 break;
2530         case IPR_HOST_RCB_OVERLAY_ID_20:
2531                 ipr_log_fabric_error(ioa_cfg, hostrcb);
2532                 break;
2533         case IPR_HOST_RCB_OVERLAY_ID_21:
2534                 ipr_log_sis64_device_error(ioa_cfg, hostrcb);
2535                 break;
2536         case IPR_HOST_RCB_OVERLAY_ID_23:
2537                 ipr_log_sis64_config_error(ioa_cfg, hostrcb);
2538                 break;
2539         case IPR_HOST_RCB_OVERLAY_ID_24:
2540         case IPR_HOST_RCB_OVERLAY_ID_26:
2541                 ipr_log_sis64_array_error(ioa_cfg, hostrcb);
2542                 break;
2543         case IPR_HOST_RCB_OVERLAY_ID_30:
2544                 ipr_log_sis64_fabric_error(ioa_cfg, hostrcb);
2545                 break;
2546         case IPR_HOST_RCB_OVERLAY_ID_1:
2547         case IPR_HOST_RCB_OVERLAY_ID_DEFAULT:
2548         default:
2549                 ipr_log_generic_error(ioa_cfg, hostrcb);
2550                 break;
2551         }
2552 }
2553 
2554 /**
2555  * ipr_process_error - Op done function for an adapter error log.
2556  * @ipr_cmd:    ipr command struct
2557  *
2558  * This function is the op done function for an error log host
2559  * controlled async from the adapter. It will log the error and
2560  * send the HCAM back to the adapter.
2561  *
2562  * Return value:
2563  *      none
2564  **/
2565 static void ipr_process_error(struct ipr_cmnd *ipr_cmd)
2566 {
2567         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2568         struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
2569         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
2570         u32 fd_ioasc;
2571 
2572         if (ioa_cfg->sis64)
2573                 fd_ioasc = be32_to_cpu(hostrcb->hcam.u.error64.fd_ioasc);
2574         else
2575                 fd_ioasc = be32_to_cpu(hostrcb->hcam.u.error.fd_ioasc);
2576 
2577         list_del(&hostrcb->queue);
2578         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
2579 
2580         if (!ioasc) {
2581                 ipr_handle_log_data(ioa_cfg, hostrcb);
2582                 if (fd_ioasc == IPR_IOASC_NR_IOA_RESET_REQUIRED)
2583                         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_ABBREV);
2584         } else if (ioasc != IPR_IOASC_IOA_WAS_RESET &&
2585                    ioasc != IPR_IOASC_ABORTED_CMD_TERM_BY_HOST) {
2586                 dev_err(&ioa_cfg->pdev->dev,
2587                         "Host RCB failed with IOASC: 0x%08X\n", ioasc);
2588         }
2589 
2590         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
2591 }
2592 
2593 /**
2594  * ipr_timeout -  An internally generated op has timed out.
2595  * @ipr_cmd:    ipr command struct
2596  *
2597  * This function blocks host requests and initiates an
2598  * adapter reset.
2599  *
2600  * Return value:
2601  *      none
2602  **/
2603 static void ipr_timeout(struct ipr_cmnd *ipr_cmd)
2604 {
2605         unsigned long lock_flags = 0;
2606         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2607 
2608         ENTER;
2609         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2610 
2611         ioa_cfg->errors_logged++;
2612         dev_err(&ioa_cfg->pdev->dev,
2613                 "Adapter being reset due to command timeout.\n");
2614 
2615         if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
2616                 ioa_cfg->sdt_state = GET_DUMP;
2617 
2618         if (!ioa_cfg->in_reset_reload || ioa_cfg->reset_cmd == ipr_cmd)
2619                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
2620 
2621         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2622         LEAVE;
2623 }
2624 
2625 /**
2626  * ipr_oper_timeout -  Adapter timed out transitioning to operational
2627  * @ipr_cmd:    ipr command struct
2628  *
2629  * This function blocks host requests and initiates an
2630  * adapter reset.
2631  *
2632  * Return value:
2633  *      none
2634  **/
2635 static void ipr_oper_timeout(struct ipr_cmnd *ipr_cmd)
2636 {
2637         unsigned long lock_flags = 0;
2638         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2639 
2640         ENTER;
2641         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2642 
2643         ioa_cfg->errors_logged++;
2644         dev_err(&ioa_cfg->pdev->dev,
2645                 "Adapter timed out transitioning to operational.\n");
2646 
2647         if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
2648                 ioa_cfg->sdt_state = GET_DUMP;
2649 
2650         if (!ioa_cfg->in_reset_reload || ioa_cfg->reset_cmd == ipr_cmd) {
2651                 if (ipr_fastfail)
2652                         ioa_cfg->reset_retries += IPR_NUM_RESET_RELOAD_RETRIES;
2653                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
2654         }
2655 
2656         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2657         LEAVE;
2658 }
2659 
2660 /**
2661  * ipr_find_ses_entry - Find matching SES in SES table
2662  * @res:        resource entry struct of SES
2663  *
2664  * Return value:
2665  *      pointer to SES table entry / NULL on failure
2666  **/
2667 static const struct ipr_ses_table_entry *
2668 ipr_find_ses_entry(struct ipr_resource_entry *res)
2669 {
2670         int i, j, matches;
2671         struct ipr_std_inq_vpids *vpids;
2672         const struct ipr_ses_table_entry *ste = ipr_ses_table;
2673 
2674         for (i = 0; i < ARRAY_SIZE(ipr_ses_table); i++, ste++) {
2675                 for (j = 0, matches = 0; j < IPR_PROD_ID_LEN; j++) {
2676                         if (ste->compare_product_id_byte[j] == 'X') {
2677                                 vpids = &res->std_inq_data.vpids;
2678                                 if (vpids->product_id[j] == ste->product_id[j])
2679                                         matches++;
2680                                 else
2681                                         break;
2682                         } else
2683                                 matches++;
2684                 }
2685 
2686                 if (matches == IPR_PROD_ID_LEN)
2687                         return ste;
2688         }
2689 
2690         return NULL;
2691 }
2692 
2693 /**
2694  * ipr_get_max_scsi_speed - Determine max SCSI speed for a given bus
2695  * @ioa_cfg:    ioa config struct
2696  * @bus:                SCSI bus
2697  * @bus_width:  bus width
2698  *
2699  * Return value:
2700  *      SCSI bus speed in units of 100KHz, 1600 is 160 MHz
2701  *      For a 2-byte wide SCSI bus, the maximum transfer speed is
2702  *      twice the maximum transfer rate (e.g. for a wide enabled bus,
2703  *      max 160MHz = max 320MB/sec).
2704  **/
2705 static u32 ipr_get_max_scsi_speed(struct ipr_ioa_cfg *ioa_cfg, u8 bus, u8 bus_width)
2706 {
2707         struct ipr_resource_entry *res;
2708         const struct ipr_ses_table_entry *ste;
2709         u32 max_xfer_rate = IPR_MAX_SCSI_RATE(bus_width);
2710 
2711         /* Loop through each config table entry in the config table buffer */
2712         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
2713                 if (!(IPR_IS_SES_DEVICE(res->std_inq_data)))
2714                         continue;
2715 
2716                 if (bus != res->bus)
2717                         continue;
2718 
2719                 if (!(ste = ipr_find_ses_entry(res)))
2720                         continue;
2721 
2722                 max_xfer_rate = (ste->max_bus_speed_limit * 10) / (bus_width / 8);
2723         }
2724 
2725         return max_xfer_rate;
2726 }
2727 
2728 /**
2729  * ipr_wait_iodbg_ack - Wait for an IODEBUG ACK from the IOA
2730  * @ioa_cfg:            ioa config struct
2731  * @max_delay:          max delay in micro-seconds to wait
2732  *
2733  * Waits for an IODEBUG ACK from the IOA, doing busy looping.
2734  *
2735  * Return value:
2736  *      0 on success / other on failure
2737  **/
2738 static int ipr_wait_iodbg_ack(struct ipr_ioa_cfg *ioa_cfg, int max_delay)
2739 {
2740         volatile u32 pcii_reg;
2741         int delay = 1;
2742 
2743         /* Read interrupt reg until IOA signals IO Debug Acknowledge */
2744         while (delay < max_delay) {
2745                 pcii_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
2746 
2747                 if (pcii_reg & IPR_PCII_IO_DEBUG_ACKNOWLEDGE)
2748                         return 0;
2749 
2750                 /* udelay cannot be used if delay is more than a few milliseconds */
2751                 if ((delay / 1000) > MAX_UDELAY_MS)
2752                         mdelay(delay / 1000);
2753                 else
2754                         udelay(delay);
2755 
2756                 delay += delay;
2757         }
2758         return -EIO;
2759 }
2760 
2761 /**
2762  * ipr_get_sis64_dump_data_section - Dump IOA memory
2763  * @ioa_cfg:                    ioa config struct
2764  * @start_addr:                 adapter address to dump
2765  * @dest:                       destination kernel buffer
2766  * @length_in_words:            length to dump in 4 byte words
2767  *
2768  * Return value:
2769  *      0 on success
2770  **/
2771 static int ipr_get_sis64_dump_data_section(struct ipr_ioa_cfg *ioa_cfg,
2772                                            u32 start_addr,
2773                                            __be32 *dest, u32 length_in_words)
2774 {
2775         int i;
2776 
2777         for (i = 0; i < length_in_words; i++) {
2778                 writel(start_addr+(i*4), ioa_cfg->regs.dump_addr_reg);
2779                 *dest = cpu_to_be32(readl(ioa_cfg->regs.dump_data_reg));
2780                 dest++;
2781         }
2782 
2783         return 0;
2784 }
2785 
2786 /**
2787  * ipr_get_ldump_data_section - Dump IOA memory
2788  * @ioa_cfg:                    ioa config struct
2789  * @start_addr:                 adapter address to dump
2790  * @dest:                               destination kernel buffer
2791  * @length_in_words:    length to dump in 4 byte words
2792  *
2793  * Return value:
2794  *      0 on success / -EIO on failure
2795  **/
2796 static int ipr_get_ldump_data_section(struct ipr_ioa_cfg *ioa_cfg,
2797                                       u32 start_addr,
2798                                       __be32 *dest, u32 length_in_words)
2799 {
2800         volatile u32 temp_pcii_reg;
2801         int i, delay = 0;
2802 
2803         if (ioa_cfg->sis64)
2804                 return ipr_get_sis64_dump_data_section(ioa_cfg, start_addr,
2805                                                        dest, length_in_words);
2806 
2807         /* Write IOA interrupt reg starting LDUMP state  */
2808         writel((IPR_UPROCI_RESET_ALERT | IPR_UPROCI_IO_DEBUG_ALERT),
2809                ioa_cfg->regs.set_uproc_interrupt_reg32);
2810 
2811         /* Wait for IO debug acknowledge */
2812         if (ipr_wait_iodbg_ack(ioa_cfg,
2813                                IPR_LDUMP_MAX_LONG_ACK_DELAY_IN_USEC)) {
2814                 dev_err(&ioa_cfg->pdev->dev,
2815                         "IOA dump long data transfer timeout\n");
2816                 return -EIO;
2817         }
2818 
2819         /* Signal LDUMP interlocked - clear IO debug ack */
2820         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2821                ioa_cfg->regs.clr_interrupt_reg);
2822 
2823         /* Write Mailbox with starting address */
2824         writel(start_addr, ioa_cfg->ioa_mailbox);
2825 
2826         /* Signal address valid - clear IOA Reset alert */
2827         writel(IPR_UPROCI_RESET_ALERT,
2828                ioa_cfg->regs.clr_uproc_interrupt_reg32);
2829 
2830         for (i = 0; i < length_in_words; i++) {
2831                 /* Wait for IO debug acknowledge */
2832                 if (ipr_wait_iodbg_ack(ioa_cfg,
2833                                        IPR_LDUMP_MAX_SHORT_ACK_DELAY_IN_USEC)) {
2834                         dev_err(&ioa_cfg->pdev->dev,
2835                                 "IOA dump short data transfer timeout\n");
2836                         return -EIO;
2837                 }
2838 
2839                 /* Read data from mailbox and increment destination pointer */
2840                 *dest = cpu_to_be32(readl(ioa_cfg->ioa_mailbox));
2841                 dest++;
2842 
2843                 /* For all but the last word of data, signal data received */
2844                 if (i < (length_in_words - 1)) {
2845                         /* Signal dump data received - Clear IO debug Ack */
2846                         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2847                                ioa_cfg->regs.clr_interrupt_reg);
2848                 }
2849         }
2850 
2851         /* Signal end of block transfer. Set reset alert then clear IO debug ack */
2852         writel(IPR_UPROCI_RESET_ALERT,
2853                ioa_cfg->regs.set_uproc_interrupt_reg32);
2854 
2855         writel(IPR_UPROCI_IO_DEBUG_ALERT,
2856                ioa_cfg->regs.clr_uproc_interrupt_reg32);
2857 
2858         /* Signal dump data received - Clear IO debug Ack */
2859         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2860                ioa_cfg->regs.clr_interrupt_reg);
2861 
2862         /* Wait for IOA to signal LDUMP exit - IOA reset alert will be cleared */
2863         while (delay < IPR_LDUMP_MAX_SHORT_ACK_DELAY_IN_USEC) {
2864                 temp_pcii_reg =
2865                     readl(ioa_cfg->regs.sense_uproc_interrupt_reg32);
2866 
2867                 if (!(temp_pcii_reg & IPR_UPROCI_RESET_ALERT))
2868                         return 0;
2869 
2870                 udelay(10);
2871                 delay += 10;
2872         }
2873 
2874         return 0;
2875 }
2876 
2877 #ifdef CONFIG_SCSI_IPR_DUMP
2878 /**
2879  * ipr_sdt_copy - Copy Smart Dump Table to kernel buffer
2880  * @ioa_cfg:            ioa config struct
2881  * @pci_address:        adapter address
2882  * @length:                     length of data to copy
2883  *
2884  * Copy data from PCI adapter to kernel buffer.
2885  * Note: length MUST be a 4 byte multiple
2886  * Return value:
2887  *      0 on success / other on failure
2888  **/
2889 static int ipr_sdt_copy(struct ipr_ioa_cfg *ioa_cfg,
2890                         unsigned long pci_address, u32 length)
2891 {
2892         int bytes_copied = 0;
2893         int cur_len, rc, rem_len, rem_page_len, max_dump_size;
2894         __be32 *page;
2895         unsigned long lock_flags = 0;
2896         struct ipr_ioa_dump *ioa_dump = &ioa_cfg->dump->ioa_dump;
2897 
2898         if (ioa_cfg->sis64)
2899                 max_dump_size = IPR_FMT3_MAX_IOA_DUMP_SIZE;
2900         else
2901                 max_dump_size = IPR_FMT2_MAX_IOA_DUMP_SIZE;
2902 
2903         while (bytes_copied < length &&
2904                (ioa_dump->hdr.len + bytes_copied) < max_dump_size) {
2905                 if (ioa_dump->page_offset >= PAGE_SIZE ||
2906                     ioa_dump->page_offset == 0) {
2907                         page = (__be32 *)__get_free_page(GFP_ATOMIC);
2908 
2909                         if (!page) {
2910                                 ipr_trace;
2911                                 return bytes_copied;
2912                         }
2913 
2914                         ioa_dump->page_offset = 0;
2915                         ioa_dump->ioa_data[ioa_dump->next_page_index] = page;
2916                         ioa_dump->next_page_index++;
2917                 } else
2918                         page = ioa_dump->ioa_data[ioa_dump->next_page_index - 1];
2919 
2920                 rem_len = length - bytes_copied;
2921                 rem_page_len = PAGE_SIZE - ioa_dump->page_offset;
2922                 cur_len = min(rem_len, rem_page_len);
2923 
2924                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2925                 if (ioa_cfg->sdt_state == ABORT_DUMP) {
2926                         rc = -EIO;
2927                 } else {
2928                         rc = ipr_get_ldump_data_section(ioa_cfg,
2929                                                         pci_address + bytes_copied,
2930                                                         &page[ioa_dump->page_offset / 4],
2931                                                         (cur_len / sizeof(u32)));
2932                 }
2933                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2934 
2935                 if (!rc) {
2936                         ioa_dump->page_offset += cur_len;
2937                         bytes_copied += cur_len;
2938                 } else {
2939                         ipr_trace;
2940                         break;
2941                 }
2942                 schedule();
2943         }
2944 
2945         return bytes_copied;
2946 }
2947 
2948 /**
2949  * ipr_init_dump_entry_hdr - Initialize a dump entry header.
2950  * @hdr:        dump entry header struct
2951  *
2952  * Return value:
2953  *      nothing
2954  **/
2955 static void ipr_init_dump_entry_hdr(struct ipr_dump_entry_header *hdr)
2956 {
2957         hdr->eye_catcher = IPR_DUMP_EYE_CATCHER;
2958         hdr->num_elems = 1;
2959         hdr->offset = sizeof(*hdr);
2960         hdr->status = IPR_DUMP_STATUS_SUCCESS;
2961 }
2962 
2963 /**
2964  * ipr_dump_ioa_type_data - Fill in the adapter type in the dump.
2965  * @ioa_cfg:    ioa config struct
2966  * @driver_dump:        driver dump struct
2967  *
2968  * Return value:
2969  *      nothing
2970  **/
2971 static void ipr_dump_ioa_type_data(struct ipr_ioa_cfg *ioa_cfg,
2972                                    struct ipr_driver_dump *driver_dump)
2973 {
2974         struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
2975 
2976         ipr_init_dump_entry_hdr(&driver_dump->ioa_type_entry.hdr);
2977         driver_dump->ioa_type_entry.hdr.len =
2978                 sizeof(struct ipr_dump_ioa_type_entry) -
2979                 sizeof(struct ipr_dump_entry_header);
2980         driver_dump->ioa_type_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
2981         driver_dump->ioa_type_entry.hdr.id = IPR_DUMP_DRIVER_TYPE_ID;
2982         driver_dump->ioa_type_entry.type = ioa_cfg->type;
2983         driver_dump->ioa_type_entry.fw_version = (ucode_vpd->major_release << 24) |
2984                 (ucode_vpd->card_type << 16) | (ucode_vpd->minor_release[0] << 8) |
2985                 ucode_vpd->minor_release[1];
2986         driver_dump->hdr.num_entries++;
2987 }
2988 
2989 /**
2990  * ipr_dump_version_data - Fill in the driver version in the dump.
2991  * @ioa_cfg:    ioa config struct
2992  * @driver_dump:        driver dump struct
2993  *
2994  * Return value:
2995  *      nothing
2996  **/
2997 static void ipr_dump_version_data(struct ipr_ioa_cfg *ioa_cfg,
2998                                   struct ipr_driver_dump *driver_dump)
2999 {
3000         ipr_init_dump_entry_hdr(&driver_dump->version_entry.hdr);
3001         driver_dump->version_entry.hdr.len =
3002                 sizeof(struct ipr_dump_version_entry) -
3003                 sizeof(struct ipr_dump_entry_header);
3004         driver_dump->version_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_ASCII;
3005         driver_dump->version_entry.hdr.id = IPR_DUMP_DRIVER_VERSION_ID;
3006         strcpy(driver_dump->version_entry.version, IPR_DRIVER_VERSION);
3007         driver_dump->hdr.num_entries++;
3008 }
3009 
3010 /**
3011  * ipr_dump_trace_data - Fill in the IOA trace in the dump.
3012  * @ioa_cfg:    ioa config struct
3013  * @driver_dump:        driver dump struct
3014  *
3015  * Return value:
3016  *      nothing
3017  **/
3018 static void ipr_dump_trace_data(struct ipr_ioa_cfg *ioa_cfg,
3019                                    struct ipr_driver_dump *driver_dump)
3020 {
3021         ipr_init_dump_entry_hdr(&driver_dump->trace_entry.hdr);
3022         driver_dump->trace_entry.hdr.len =
3023                 sizeof(struct ipr_dump_trace_entry) -
3024                 sizeof(struct ipr_dump_entry_header);
3025         driver_dump->trace_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
3026         driver_dump->trace_entry.hdr.id = IPR_DUMP_TRACE_ID;
3027         memcpy(driver_dump->trace_entry.trace, ioa_cfg->trace, IPR_TRACE_SIZE);
3028         driver_dump->hdr.num_entries++;
3029 }
3030 
3031 /**
3032  * ipr_dump_location_data - Fill in the IOA location in the dump.
3033  * @ioa_cfg:    ioa config struct
3034  * @driver_dump:        driver dump struct
3035  *
3036  * Return value:
3037  *      nothing
3038  **/
3039 static void ipr_dump_location_data(struct ipr_ioa_cfg *ioa_cfg,
3040                                    struct ipr_driver_dump *driver_dump)
3041 {
3042         ipr_init_dump_entry_hdr(&driver_dump->location_entry.hdr);
3043         driver_dump->location_entry.hdr.len =
3044                 sizeof(struct ipr_dump_location_entry) -
3045                 sizeof(struct ipr_dump_entry_header);
3046         driver_dump->location_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_ASCII;
3047         driver_dump->location_entry.hdr.id = IPR_DUMP_LOCATION_ID;
3048         strcpy(driver_dump->location_entry.location, dev_name(&ioa_cfg->pdev->dev));
3049         driver_dump->hdr.num_entries++;
3050 }
3051 
3052 /**
3053  * ipr_get_ioa_dump - Perform a dump of the driver and adapter.
3054  * @ioa_cfg:    ioa config struct
3055  * @dump:               dump struct
3056  *
3057  * Return value:
3058  *      nothing
3059  **/
3060 static void ipr_get_ioa_dump(struct ipr_ioa_cfg *ioa_cfg, struct ipr_dump *dump)
3061 {
3062         unsigned long start_addr, sdt_word;
3063         unsigned long lock_flags = 0;
3064         struct ipr_driver_dump *driver_dump = &dump->driver_dump;
3065         struct ipr_ioa_dump *ioa_dump = &dump->ioa_dump;
3066         u32 num_entries, max_num_entries, start_off, end_off;
3067         u32 max_dump_size, bytes_to_copy, bytes_copied, rc;
3068         struct ipr_sdt *sdt;
3069         int valid = 1;
3070         int i;
3071 
3072         ENTER;
3073 
3074         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3075 
3076         if (ioa_cfg->sdt_state != READ_DUMP) {
3077                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3078                 return;
3079         }
3080 
3081         if (ioa_cfg->sis64) {
3082                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3083                 ssleep(IPR_DUMP_DELAY_SECONDS);
3084                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3085         }
3086 
3087         start_addr = readl(ioa_cfg->ioa_mailbox);
3088 
3089         if (!ioa_cfg->sis64 && !ipr_sdt_is_fmt2(start_addr)) {
3090                 dev_err(&ioa_cfg->pdev->dev,
3091                         "Invalid dump table format: %lx\n", start_addr);
3092                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3093                 return;
3094         }
3095 
3096         dev_err(&ioa_cfg->pdev->dev, "Dump of IOA initiated\n");
3097 
3098         driver_dump->hdr.eye_catcher = IPR_DUMP_EYE_CATCHER;
3099 
3100         /* Initialize the overall dump header */
3101         driver_dump->hdr.len = sizeof(struct ipr_driver_dump);
3102         driver_dump->hdr.num_entries = 1;
3103         driver_dump->hdr.first_entry_offset = sizeof(struct ipr_dump_header);
3104         driver_dump->hdr.status = IPR_DUMP_STATUS_SUCCESS;
3105         driver_dump->hdr.os = IPR_DUMP_OS_LINUX;
3106         driver_dump->hdr.driver_name = IPR_DUMP_DRIVER_NAME;
3107 
3108         ipr_dump_version_data(ioa_cfg, driver_dump);
3109         ipr_dump_location_data(ioa_cfg, driver_dump);
3110         ipr_dump_ioa_type_data(ioa_cfg, driver_dump);
3111         ipr_dump_trace_data(ioa_cfg, driver_dump);
3112 
3113         /* Update dump_header */
3114         driver_dump->hdr.len += sizeof(struct ipr_dump_entry_header);
3115 
3116         /* IOA Dump entry */
3117         ipr_init_dump_entry_hdr(&ioa_dump->hdr);
3118         ioa_dump->hdr.len = 0;
3119         ioa_dump->hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
3120         ioa_dump->hdr.id = IPR_DUMP_IOA_DUMP_ID;
3121 
3122         /* First entries in sdt are actually a list of dump addresses and
3123          lengths to gather the real dump data.  sdt represents the pointer
3124          to the ioa generated dump table.  Dump data will be extracted based
3125          on entries in this table */
3126         sdt = &ioa_dump->sdt;
3127 
3128         if (ioa_cfg->sis64) {
3129                 max_num_entries = IPR_FMT3_NUM_SDT_ENTRIES;
3130                 max_dump_size = IPR_FMT3_MAX_IOA_DUMP_SIZE;
3131         } else {
3132                 max_num_entries = IPR_FMT2_NUM_SDT_ENTRIES;
3133                 max_dump_size = IPR_FMT2_MAX_IOA_DUMP_SIZE;
3134         }
3135 
3136         bytes_to_copy = offsetof(struct ipr_sdt, entry) +
3137                         (max_num_entries * sizeof(struct ipr_sdt_entry));
3138         rc = ipr_get_ldump_data_section(ioa_cfg, start_addr, (__be32 *)sdt,
3139                                         bytes_to_copy / sizeof(__be32));
3140 
3141         /* Smart Dump table is ready to use and the first entry is valid */
3142         if (rc || ((be32_to_cpu(sdt->hdr.state) != IPR_FMT3_SDT_READY_TO_USE) &&
3143             (be32_to_cpu(sdt->hdr.state) != IPR_FMT2_SDT_READY_TO_USE))) {
3144                 dev_err(&ioa_cfg->pdev->dev,
3145                         "Dump of IOA failed. Dump table not valid: %d, %X.\n",
3146                         rc, be32_to_cpu(sdt->hdr.state));
3147                 driver_dump->hdr.status = IPR_DUMP_STATUS_FAILED;
3148                 ioa_cfg->sdt_state = DUMP_OBTAINED;
3149                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3150                 return;
3151         }
3152 
3153         num_entries = be32_to_cpu(sdt->hdr.num_entries_used);
3154 
3155         if (num_entries > max_num_entries)
3156                 num_entries = max_num_entries;
3157 
3158         /* Update dump length to the actual data to be copied */
3159         dump->driver_dump.hdr.len += sizeof(struct ipr_sdt_header);
3160         if (ioa_cfg->sis64)
3161                 dump->driver_dump.hdr.len += num_entries * sizeof(struct ipr_sdt_entry);
3162         else
3163                 dump->driver_dump.hdr.len += max_num_entries * sizeof(struct ipr_sdt_entry);
3164 
3165         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3166 
3167         for (i = 0; i < num_entries; i++) {
3168                 if (ioa_dump->hdr.len > max_dump_size) {
3169                         driver_dump->hdr.status = IPR_DUMP_STATUS_QUAL_SUCCESS;
3170                         break;
3171                 }
3172 
3173                 if (sdt->entry[i].flags & IPR_SDT_VALID_ENTRY) {
3174                         sdt_word = be32_to_cpu(sdt->entry[i].start_token);
3175                         if (ioa_cfg->sis64)
3176                                 bytes_to_copy = be32_to_cpu(sdt->entry[i].end_token);
3177                         else {
3178                                 start_off = sdt_word & IPR_FMT2_MBX_ADDR_MASK;
3179                                 end_off = be32_to_cpu(sdt->entry[i].end_token);
3180 
3181                                 if (ipr_sdt_is_fmt2(sdt_word) && sdt_word)
3182                                         bytes_to_copy = end_off - start_off;
3183                                 else
3184                                         valid = 0;
3185                         }
3186                         if (valid) {
3187                                 if (bytes_to_copy > max_dump_size) {
3188                                         sdt->entry[i].flags &= ~IPR_SDT_VALID_ENTRY;
3189                                         continue;
3190                                 }
3191 
3192                                 /* Copy data from adapter to driver buffers */
3193                                 bytes_copied = ipr_sdt_copy(ioa_cfg, sdt_word,
3194                                                             bytes_to_copy);
3195 
3196                                 ioa_dump->hdr.len += bytes_copied;
3197 
3198                                 if (bytes_copied != bytes_to_copy) {
3199                                         driver_dump->hdr.status = IPR_DUMP_STATUS_QUAL_SUCCESS;
3200                                         break;
3201                                 }
3202                         }
3203                 }
3204         }
3205 
3206         dev_err(&ioa_cfg->pdev->dev, "Dump of IOA completed.\n");
3207 
3208         /* Update dump_header */
3209         driver_dump->hdr.len += ioa_dump->hdr.len;
3210         wmb();
3211         ioa_cfg->sdt_state = DUMP_OBTAINED;
3212         LEAVE;
3213 }
3214 
3215 #else
3216 #define ipr_get_ioa_dump(ioa_cfg, dump) do { } while (0)
3217 #endif
3218 
3219 /**
3220  * ipr_release_dump - Free adapter dump memory
3221  * @kref:       kref struct
3222  *
3223  * Return value:
3224  *      nothing
3225  **/
3226 static void ipr_release_dump(struct kref *kref)
3227 {
3228         struct ipr_dump *dump = container_of(kref, struct ipr_dump, kref);
3229         struct ipr_ioa_cfg *ioa_cfg = dump->ioa_cfg;
3230         unsigned long lock_flags = 0;
3231         int i;
3232 
3233         ENTER;
3234         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3235         ioa_cfg->dump = NULL;
3236         ioa_cfg->sdt_state = INACTIVE;
3237         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3238 
3239         for (i = 0; i < dump->ioa_dump.next_page_index; i++)
3240                 free_page((unsigned long) dump->ioa_dump.ioa_data[i]);
3241 
3242         vfree(dump->ioa_dump.ioa_data);
3243         kfree(dump);
3244         LEAVE;
3245 }
3246 
3247 /**
3248  * ipr_worker_thread - Worker thread
3249  * @work:               ioa config struct
3250  *
3251  * Called at task level from a work thread. This function takes care
3252  * of adding and removing device from the mid-layer as configuration
3253  * changes are detected by the adapter.
3254  *
3255  * Return value:
3256  *      nothing
3257  **/
3258 static void ipr_worker_thread(struct work_struct *work)
3259 {
3260         unsigned long lock_flags;
3261         struct ipr_resource_entry *res;
3262         struct scsi_device *sdev;
3263         struct ipr_dump *dump;
3264         struct ipr_ioa_cfg *ioa_cfg =
3265                 container_of(work, struct ipr_ioa_cfg, work_q);
3266         u8 bus, target, lun;
3267         int did_work;
3268 
3269         ENTER;
3270         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3271 
3272         if (ioa_cfg->sdt_state == READ_DUMP) {
3273                 dump = ioa_cfg->dump;
3274                 if (!dump) {
3275                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3276                         return;
3277                 }
3278                 kref_get(&dump->kref);
3279                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3280                 ipr_get_ioa_dump(ioa_cfg, dump);
3281                 kref_put(&dump->kref, ipr_release_dump);
3282 
3283                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3284                 if (ioa_cfg->sdt_state == DUMP_OBTAINED && !ioa_cfg->dump_timeout)
3285                         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
3286                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3287                 return;
3288         }
3289 
3290 restart:
3291         do {
3292                 did_work = 0;
3293                 if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds) {
3294                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3295                         return;
3296                 }
3297 
3298                 list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
3299                         if (res->del_from_ml && res->sdev) {
3300                                 did_work = 1;
3301                                 sdev = res->sdev;
3302                                 if (!scsi_device_get(sdev)) {
3303                                         if (!res->add_to_ml)
3304                                                 list_move_tail(&res->queue, &ioa_cfg->free_res_q);
3305                                         else
3306                                                 res->del_from_ml = 0;
3307                                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3308                                         scsi_remove_device(sdev);
3309                                         scsi_device_put(sdev);
3310                                         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3311                                 }
3312                                 break;
3313                         }
3314                 }
3315         } while (did_work);
3316 
3317         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
3318                 if (res->add_to_ml) {
3319                         bus = res->bus;
3320                         target = res->target;
3321                         lun = res->lun;
3322                         res->add_to_ml = 0;
3323                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3324                         scsi_add_device(ioa_cfg->host, bus, target, lun);
3325                         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3326                         goto restart;
3327                 }
3328         }
3329 
3330         ioa_cfg->scan_done = 1;
3331         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3332         kobject_uevent(&ioa_cfg->host->shost_dev.kobj, KOBJ_CHANGE);
3333         LEAVE;
3334 }
3335 
3336 #ifdef CONFIG_SCSI_IPR_TRACE
3337 /**
3338  * ipr_read_trace - Dump the adapter trace
3339  * @filp:               open sysfs file
3340  * @kobj:               kobject struct
3341  * @bin_attr:           bin_attribute struct
3342  * @buf:                buffer
3343  * @off:                offset
3344  * @count:              buffer size
3345  *
3346  * Return value:
3347  *      number of bytes printed to buffer
3348  **/
3349 static ssize_t ipr_read_trace(struct file *filp, struct kobject *kobj,
3350                               struct bin_attribute *bin_attr,
3351                               char *buf, loff_t off, size_t count)
3352 {
3353         struct device *dev = container_of(kobj, struct device, kobj);
3354         struct Scsi_Host *shost = class_to_shost(dev);
3355         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3356         unsigned long lock_flags = 0;
3357         ssize_t ret;
3358 
3359         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3360         ret = memory_read_from_buffer(buf, count, &off, ioa_cfg->trace,
3361                                 IPR_TRACE_SIZE);
3362         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3363 
3364         return ret;
3365 }
3366 
3367 static struct bin_attribute ipr_trace_attr = {
3368         .attr = {
3369                 .name = "trace",
3370                 .mode = S_IRUGO,
3371         },
3372         .size = 0,
3373         .read = ipr_read_trace,
3374 };
3375 #endif
3376 
3377 /**
3378  * ipr_show_fw_version - Show the firmware version
3379  * @dev:        class device struct
3380  * @buf:        buffer
3381  *
3382  * Return value:
3383  *      number of bytes printed to buffer
3384  **/
3385 static ssize_t ipr_show_fw_version(struct device *dev,
3386                                    struct device_attribute *attr, char *buf)
3387 {
3388         struct Scsi_Host *shost = class_to_shost(dev);
3389         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3390         struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
3391         unsigned long lock_flags = 0;
3392         int len;
3393 
3394         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3395         len = snprintf(buf, PAGE_SIZE, "%02X%02X%02X%02X\n",
3396                        ucode_vpd->major_release, ucode_vpd->card_type,
3397                        ucode_vpd->minor_release[0],
3398                        ucode_vpd->minor_release[1]);
3399         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3400         return len;
3401 }
3402 
3403 static struct device_attribute ipr_fw_version_attr = {
3404         .attr = {
3405                 .name =         "fw_version",
3406                 .mode =         S_IRUGO,
3407         },
3408         .show = ipr_show_fw_version,
3409 };
3410 
3411 /**
3412  * ipr_show_log_level - Show the adapter's error logging level
3413  * @dev:        class device struct
3414  * @buf:        buffer
3415  *
3416  * Return value:
3417  *      number of bytes printed to buffer
3418  **/
3419 static ssize_t ipr_show_log_level(struct device *dev,
3420                                    struct device_attribute *attr, char *buf)
3421 {
3422         struct Scsi_Host *shost = class_to_shost(dev);
3423         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3424         unsigned long lock_flags = 0;
3425         int len;
3426 
3427         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3428         len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->log_level);
3429         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3430         return len;
3431 }
3432 
3433 /**
3434  * ipr_store_log_level - Change the adapter's error logging level
3435  * @dev:        class device struct
3436  * @buf:        buffer
3437  *
3438  * Return value:
3439  *      number of bytes printed to buffer
3440  **/
3441 static ssize_t ipr_store_log_level(struct device *dev,
3442                                    struct device_attribute *attr,
3443                                    const char *buf, size_t count)
3444 {
3445         struct Scsi_Host *shost = class_to_shost(dev);
3446         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3447         unsigned long lock_flags = 0;
3448 
3449         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3450         ioa_cfg->log_level = simple_strtoul(buf, NULL, 10);
3451         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3452         return strlen(buf);
3453 }
3454 
3455 static struct device_attribute ipr_log_level_attr = {
3456         .attr = {
3457                 .name =         "log_level",
3458                 .mode =         S_IRUGO | S_IWUSR,
3459         },
3460         .show = ipr_show_log_level,
3461         .store = ipr_store_log_level
3462 };
3463 
3464 /**
3465  * ipr_store_diagnostics - IOA Diagnostics interface
3466  * @dev:        device struct
3467  * @buf:        buffer
3468  * @count:      buffer size
3469  *
3470  * This function will reset the adapter and wait a reasonable
3471  * amount of time for any errors that the adapter might log.
3472  *
3473  * Return value:
3474  *      count on success / other on failure
3475  **/
3476 static ssize_t ipr_store_diagnostics(struct device *dev,
3477                                      struct device_attribute *attr,
3478                                      const char *buf, size_t count)
3479 {
3480         struct Scsi_Host *shost = class_to_shost(dev);
3481         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3482         unsigned long lock_flags = 0;
3483         int rc = count;
3484 
3485         if (!capable(CAP_SYS_ADMIN))
3486                 return -EACCES;
3487 
3488         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3489         while (ioa_cfg->in_reset_reload) {
3490                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3491                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3492                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3493         }
3494 
3495         ioa_cfg->errors_logged = 0;
3496         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3497 
3498         if (ioa_cfg->in_reset_reload) {
3499                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3500                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3501 
3502                 /* Wait for a second for any errors to be logged */
3503                 msleep(1000);
3504         } else {
3505                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3506                 return -EIO;
3507         }
3508 
3509         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3510         if (ioa_cfg->in_reset_reload || ioa_cfg->errors_logged)
3511                 rc = -EIO;
3512         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3513 
3514         return rc;
3515 }
3516 
3517 static struct device_attribute ipr_diagnostics_attr = {
3518         .attr = {
3519                 .name =         "run_diagnostics",
3520                 .mode =         S_IWUSR,
3521         },
3522         .store = ipr_store_diagnostics
3523 };
3524 
3525 /**
3526  * ipr_show_adapter_state - Show the adapter's state
3527  * @class_dev:  device struct
3528  * @buf:        buffer
3529  *
3530  * Return value:
3531  *      number of bytes printed to buffer
3532  **/
3533 static ssize_t ipr_show_adapter_state(struct device *dev,
3534                                       struct device_attribute *attr, char *buf)
3535 {
3536         struct Scsi_Host *shost = class_to_shost(dev);
3537         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3538         unsigned long lock_flags = 0;
3539         int len;
3540 
3541         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3542         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
3543                 len = snprintf(buf, PAGE_SIZE, "offline\n");
3544         else
3545                 len = snprintf(buf, PAGE_SIZE, "online\n");
3546         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3547         return len;
3548 }
3549 
3550 /**
3551  * ipr_store_adapter_state - Change adapter state
3552  * @dev:        device struct
3553  * @buf:        buffer
3554  * @count:      buffer size
3555  *
3556  * This function will change the adapter's state.
3557  *
3558  * Return value:
3559  *      count on success / other on failure
3560  **/
3561 static ssize_t ipr_store_adapter_state(struct device *dev,
3562                                        struct device_attribute *attr,
3563                                        const char *buf, size_t count)
3564 {
3565         struct Scsi_Host *shost = class_to_shost(dev);
3566         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3567         unsigned long lock_flags;
3568         int result = count, i;
3569 
3570         if (!capable(CAP_SYS_ADMIN))
3571                 return -EACCES;
3572 
3573         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3574         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead &&
3575             !strncmp(buf, "online", 6)) {
3576                 for (i = 0; i < ioa_cfg->hrrq_num; i++) {
3577                         spin_lock(&ioa_cfg->hrrq[i]._lock);
3578                         ioa_cfg->hrrq[i].ioa_is_dead = 0;
3579                         spin_unlock(&ioa_cfg->hrrq[i]._lock);
3580                 }
3581                 wmb();
3582                 ioa_cfg->reset_retries = 0;
3583                 ioa_cfg->in_ioa_bringdown = 0;
3584                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
3585         }
3586         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3587         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3588 
3589         return result;
3590 }
3591 
3592 static struct device_attribute ipr_ioa_state_attr = {
3593         .attr = {
3594                 .name =         "online_state",
3595                 .mode =         S_IRUGO | S_IWUSR,
3596         },
3597         .show = ipr_show_adapter_state,
3598         .store = ipr_store_adapter_state
3599 };
3600 
3601 /**
3602  * ipr_store_reset_adapter - Reset the adapter
3603  * @dev:        device struct
3604  * @buf:        buffer
3605  * @count:      buffer size
3606  *
3607  * This function will reset the adapter.
3608  *
3609  * Return value:
3610  *      count on success / other on failure
3611  **/
3612 static ssize_t ipr_store_reset_adapter(struct device *dev,
3613                                        struct device_attribute *attr,
3614                                        const char *buf, size_t count)
3615 {
3616         struct Scsi_Host *shost = class_to_shost(dev);
3617         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3618         unsigned long lock_flags;
3619         int result = count;
3620 
3621         if (!capable(CAP_SYS_ADMIN))
3622                 return -EACCES;
3623 
3624         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3625         if (!ioa_cfg->in_reset_reload)
3626                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3627         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3628         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3629 
3630         return result;
3631 }
3632 
3633 static struct device_attribute ipr_ioa_reset_attr = {
3634         .attr = {
3635                 .name =         "reset_host",
3636                 .mode =         S_IWUSR,
3637         },
3638         .store = ipr_store_reset_adapter
3639 };
3640 
3641 static int ipr_iopoll(struct blk_iopoll *iop, int budget);
3642  /**
3643  * ipr_show_iopoll_weight - Show ipr polling mode
3644  * @dev:        class device struct
3645  * @buf:        buffer
3646  *
3647  * Return value:
3648  *      number of bytes printed to buffer
3649  **/
3650 static ssize_t ipr_show_iopoll_weight(struct device *dev,
3651                                    struct device_attribute *attr, char *buf)
3652 {
3653         struct Scsi_Host *shost = class_to_shost(dev);
3654         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3655         unsigned long lock_flags = 0;
3656         int len;
3657 
3658         spin_lock_irqsave(shost->host_lock, lock_flags);
3659         len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->iopoll_weight);
3660         spin_unlock_irqrestore(shost->host_lock, lock_flags);
3661 
3662         return len;
3663 }
3664 
3665 /**
3666  * ipr_store_iopoll_weight - Change the adapter's polling mode
3667  * @dev:        class device struct
3668  * @buf:        buffer
3669  *
3670  * Return value:
3671  *      number of bytes printed to buffer
3672  **/
3673 static ssize_t ipr_store_iopoll_weight(struct device *dev,
3674                                         struct device_attribute *attr,
3675                                         const char *buf, size_t count)
3676 {
3677         struct Scsi_Host *shost = class_to_shost(dev);
3678         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3679         unsigned long user_iopoll_weight;
3680         unsigned long lock_flags = 0;
3681         int i;
3682 
3683         if (!ioa_cfg->sis64) {
3684                 dev_info(&ioa_cfg->pdev->dev, "blk-iopoll not supported on this adapter\n");
3685                 return -EINVAL;
3686         }
3687         if (kstrtoul(buf, 10, &user_iopoll_weight))
3688                 return -EINVAL;
3689 
3690         if (user_iopoll_weight > 256) {
3691                 dev_info(&ioa_cfg->pdev->dev, "Invalid blk-iopoll weight. It must be less than 256\n");
3692                 return -EINVAL;
3693         }
3694 
3695         if (user_iopoll_weight == ioa_cfg->iopoll_weight) {
3696                 dev_info(&ioa_cfg->pdev->dev, "Current blk-iopoll weight has the same weight\n");
3697                 return strlen(buf);
3698         }
3699 
3700         if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
3701                 for (i = 1; i < ioa_cfg->hrrq_num; i++)
3702                         blk_iopoll_disable(&ioa_cfg->hrrq[i].iopoll);
3703         }
3704 
3705         spin_lock_irqsave(shost->host_lock, lock_flags);
3706         ioa_cfg->iopoll_weight = user_iopoll_weight;
3707         if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
3708                 for (i = 1; i < ioa_cfg->hrrq_num; i++) {
3709                         blk_iopoll_init(&ioa_cfg->hrrq[i].iopoll,
3710                                         ioa_cfg->iopoll_weight, ipr_iopoll);
3711                         blk_iopoll_enable(&ioa_cfg->hrrq[i].iopoll);
3712                 }
3713         }
3714         spin_unlock_irqrestore(shost->host_lock, lock_flags);
3715 
3716         return strlen(buf);
3717 }
3718 
3719 static struct device_attribute ipr_iopoll_weight_attr = {
3720         .attr = {
3721                 .name =         "iopoll_weight",
3722                 .mode =         S_IRUGO | S_IWUSR,
3723         },
3724         .show = ipr_show_iopoll_weight,
3725         .store = ipr_store_iopoll_weight
3726 };
3727 
3728 /**
3729  * ipr_alloc_ucode_buffer - Allocates a microcode download buffer
3730  * @buf_len:            buffer length
3731  *
3732  * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3733  * list to use for microcode download
3734  *
3735  * Return value:
3736  *      pointer to sglist / NULL on failure
3737  **/
3738 static struct ipr_sglist *ipr_alloc_ucode_buffer(int buf_len)
3739 {
3740         int sg_size, order, bsize_elem, num_elem, i, j;
3741         struct ipr_sglist *sglist;
3742         struct scatterlist *scatterlist;
3743         struct page *page;
3744 
3745         /* Get the minimum size per scatter/gather element */
3746         sg_size = buf_len / (IPR_MAX_SGLIST - 1);
3747 
3748         /* Get the actual size per element */
3749         order = get_order(sg_size);
3750 
3751         /* Determine the actual number of bytes per element */
3752         bsize_elem = PAGE_SIZE * (1 << order);
3753 
3754         /* Determine the actual number of sg entries needed */
3755         if (buf_len % bsize_elem)
3756                 num_elem = (buf_len / bsize_elem) + 1;
3757         else
3758                 num_elem = buf_len / bsize_elem;
3759 
3760         /* Allocate a scatter/gather list for the DMA */
3761         sglist = kzalloc(sizeof(struct ipr_sglist) +
3762                          (sizeof(struct scatterlist) * (num_elem - 1)),
3763                          GFP_KERNEL);
3764 
3765         if (sglist == NULL) {
3766                 ipr_trace;
3767                 return NULL;
3768         }
3769 
3770         scatterlist = sglist->scatterlist;
3771         sg_init_table(scatterlist, num_elem);
3772 
3773         sglist->order = order;
3774         sglist->num_sg = num_elem;
3775 
3776         /* Allocate a bunch of sg elements */
3777         for (i = 0; i < num_elem; i++) {
3778                 page = alloc_pages(GFP_KERNEL, order);
3779                 if (!page) {
3780                         ipr_trace;
3781 
3782                         /* Free up what we already allocated */
3783                         for (j = i - 1; j >= 0; j--)
3784                                 __free_pages(sg_page(&scatterlist[j]), order);
3785                         kfree(sglist);
3786                         return NULL;
3787                 }
3788 
3789                 sg_set_page(&scatterlist[i], page, 0, 0);
3790         }
3791 
3792         return sglist;
3793 }
3794 
3795 /**
3796  * ipr_free_ucode_buffer - Frees a microcode download buffer
3797  * @p_dnld:             scatter/gather list pointer
3798  *
3799  * Free a DMA'able ucode download buffer previously allocated with
3800  * ipr_alloc_ucode_buffer
3801  *
3802  * Return value:
3803  *      nothing
3804  **/
3805 static void ipr_free_ucode_buffer(struct ipr_sglist *sglist)
3806 {
3807         int i;
3808 
3809         for (i = 0; i < sglist->num_sg; i++)
3810                 __free_pages(sg_page(&sglist->scatterlist[i]), sglist->order);
3811 
3812         kfree(sglist);
3813 }
3814 
3815 /**
3816  * ipr_copy_ucode_buffer - Copy user buffer to kernel buffer
3817  * @sglist:             scatter/gather list pointer
3818  * @buffer:             buffer pointer
3819  * @len:                buffer length
3820  *
3821  * Copy a microcode image from a user buffer into a buffer allocated by
3822  * ipr_alloc_ucode_buffer
3823  *
3824  * Return value:
3825  *      0 on success / other on failure
3826  **/
3827 static int ipr_copy_ucode_buffer(struct ipr_sglist *sglist,
3828                                  u8 *buffer, u32 len)
3829 {
3830         int bsize_elem, i, result = 0;
3831         struct scatterlist *scatterlist;
3832         void *kaddr;
3833 
3834         /* Determine the actual number of bytes per element */
3835         bsize_elem = PAGE_SIZE * (1 << sglist->order);
3836 
3837         scatterlist = sglist->scatterlist;
3838 
3839         for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3840                 struct page *page = sg_page(&scatterlist[i]);
3841 
3842                 kaddr = kmap(page);
3843                 memcpy(kaddr, buffer, bsize_elem);
3844                 kunmap(page);
3845 
3846                 scatterlist[i].length = bsize_elem;
3847 
3848                 if (result != 0) {
3849                         ipr_trace;
3850                         return result;
3851                 }
3852         }
3853 
3854         if (len % bsize_elem) {
3855                 struct page *page = sg_page(&scatterlist[i]);
3856 
3857                 kaddr = kmap(page);
3858                 memcpy(kaddr, buffer, len % bsize_elem);
3859                 kunmap(page);
3860 
3861                 scatterlist[i].length = len % bsize_elem;
3862         }
3863 
3864         sglist->buffer_len = len;
3865         return result;
3866 }
3867 
3868 /**
3869  * ipr_build_ucode_ioadl64 - Build a microcode download IOADL
3870  * @ipr_cmd:            ipr command struct
3871  * @sglist:             scatter/gather list
3872  *
3873  * Builds a microcode download IOA data list (IOADL).
3874  *
3875  **/
3876 static void ipr_build_ucode_ioadl64(struct ipr_cmnd *ipr_cmd,
3877                                     struct ipr_sglist *sglist)
3878 {
3879         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
3880         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
3881         struct scatterlist *scatterlist = sglist->scatterlist;
3882         int i;
3883 
3884         ipr_cmd->dma_use_sg = sglist->num_dma_sg;
3885         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
3886         ioarcb->data_transfer_length = cpu_to_be32(sglist->buffer_len);
3887 
3888         ioarcb->ioadl_len =
3889                 cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
3890         for (i = 0; i < ipr_cmd->dma_use_sg; i++) {
3891                 ioadl64[i].flags = cpu_to_be32(IPR_IOADL_FLAGS_WRITE);
3892                 ioadl64[i].data_len = cpu_to_be32(sg_dma_len(&scatterlist[i]));
3893                 ioadl64[i].address = cpu_to_be64(sg_dma_address(&scatterlist[i]));
3894         }
3895 
3896         ioadl64[i-1].flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
3897 }
3898 
3899 /**
3900  * ipr_build_ucode_ioadl - Build a microcode download IOADL
3901  * @ipr_cmd:    ipr command struct
3902  * @sglist:             scatter/gather list
3903  *
3904  * Builds a microcode download IOA data list (IOADL).
3905  *
3906  **/
3907 static void ipr_build_ucode_ioadl(struct ipr_cmnd *ipr_cmd,
3908                                   struct ipr_sglist *sglist)
3909 {
3910         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
3911         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
3912         struct scatterlist *scatterlist = sglist->scatterlist;
3913         int i;
3914 
3915         ipr_cmd->dma_use_sg = sglist->num_dma_sg;
3916         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
3917         ioarcb->data_transfer_length = cpu_to_be32(sglist->buffer_len);
3918 
3919         ioarcb->ioadl_len =
3920                 cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
3921 
3922         for (i = 0; i < ipr_cmd->dma_use_sg; i++) {
3923                 ioadl[i].flags_and_data_len =
3924                         cpu_to_be32(IPR_IOADL_FLAGS_WRITE | sg_dma_len(&scatterlist[i]));
3925                 ioadl[i].address =
3926                         cpu_to_be32(sg_dma_address(&scatterlist[i]));
3927         }
3928 
3929         ioadl[i-1].flags_and_data_len |=
3930                 cpu_to_be32(IPR_IOADL_FLAGS_LAST);
3931 }
3932 
3933 /**
3934  * ipr_update_ioa_ucode - Update IOA's microcode
3935  * @ioa_cfg:    ioa config struct
3936  * @sglist:             scatter/gather list
3937  *
3938  * Initiate an adapter reset to update the IOA's microcode
3939  *
3940  * Return value:
3941  *      0 on success / -EIO on failure
3942  **/
3943 static int ipr_update_ioa_ucode(struct ipr_ioa_cfg *ioa_cfg,
3944                                 struct ipr_sglist *sglist)
3945 {
3946         unsigned long lock_flags;
3947 
3948         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3949         while (ioa_cfg->in_reset_reload) {
3950                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3951                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3952                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3953         }
3954 
3955         if (ioa_cfg->ucode_sglist) {
3956                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3957                 dev_err(&ioa_cfg->pdev->dev,
3958                         "Microcode download already in progress\n");
3959                 return -EIO;
3960         }
3961 
3962         sglist->num_dma_sg = dma_map_sg(&ioa_cfg->pdev->dev,
3963                                         sglist->scatterlist, sglist->num_sg,
3964                                         DMA_TO_DEVICE);
3965 
3966         if (!sglist->num_dma_sg) {
3967                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3968                 dev_err(&ioa_cfg->pdev->dev,
3969                         "Failed to map microcode download buffer!\n");
3970                 return -EIO;
3971         }
3972 
3973         ioa_cfg->ucode_sglist = sglist;
3974         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3975         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3976         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3977 
3978         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3979         ioa_cfg->ucode_sglist = NULL;
3980         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3981         return 0;
3982 }
3983 
3984 /**
3985  * ipr_store_update_fw - Update the firmware on the adapter
3986  * @class_dev:  device struct
3987  * @buf:        buffer
3988  * @count:      buffer size
3989  *
3990  * This function will update the firmware on the adapter.
3991  *
3992  * Return value:
3993  *      count on success / other on failure
3994  **/
3995 static ssize_t ipr_store_update_fw(struct device *dev,
3996                                    struct device_attribute *attr,
3997                                    const char *buf, size_t count)
3998 {
3999         struct Scsi_Host *shost = class_to_shost(dev);
4000         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4001         struct ipr_ucode_image_header *image_hdr;
4002         const struct firmware *fw_entry;
4003         struct ipr_sglist *sglist;
4004         char fname[100];
4005         char *src;
4006         int len, result, dnld_size;
4007 
4008         if (!capable(CAP_SYS_ADMIN))
4009                 return -EACCES;
4010 
4011         len = snprintf(fname, 99, "%s", buf);
4012         fname[len-1] = '\0';
4013 
4014         if (request_firmware(&fw_entry, fname, &ioa_cfg->pdev->dev)) {
4015                 dev_err(&ioa_cfg->pdev->dev, "Firmware file %s not found\n", fname);
4016                 return -EIO;
4017         }
4018 
4019         image_hdr = (struct ipr_ucode_image_header *)fw_entry->data;
4020 
4021         src = (u8 *)image_hdr + be32_to_cpu(image_hdr->header_length);
4022         dnld_size = fw_entry->size - be32_to_cpu(image_hdr->header_length);
4023         sglist = ipr_alloc_ucode_buffer(dnld_size);
4024 
4025         if (!sglist) {
4026                 dev_err(&ioa_cfg->pdev->dev, "Microcode buffer allocation failed\n");
4027                 release_firmware(fw_entry);
4028                 return -ENOMEM;
4029         }
4030 
4031         result = ipr_copy_ucode_buffer(sglist, src, dnld_size);
4032 
4033         if (result) {
4034                 dev_err(&ioa_cfg->pdev->dev,
4035                         "Microcode buffer copy to DMA buffer failed\n");
4036                 goto out;
4037         }
4038 
4039         ipr_info("Updating microcode, please be patient.  This may take up to 30 minutes.\n");
4040 
4041         result = ipr_update_ioa_ucode(ioa_cfg, sglist);
4042 
4043         if (!result)
4044                 result = count;
4045 out:
4046         ipr_free_ucode_buffer(sglist);
4047         release_firmware(fw_entry);
4048         return result;
4049 }
4050 
4051 static struct device_attribute ipr_update_fw_attr = {
4052         .attr = {
4053                 .name =         "update_fw",
4054                 .mode =         S_IWUSR,
4055         },
4056         .store = ipr_store_update_fw
4057 };
4058 
4059 /**
4060  * ipr_show_fw_type - Show the adapter's firmware type.
4061  * @dev:        class device struct
4062  * @buf:        buffer
4063  *
4064  * Return value:
4065  *      number of bytes printed to buffer
4066  **/
4067 static ssize_t ipr_show_fw_type(struct device *dev,
4068                                 struct device_attribute *attr, char *buf)
4069 {
4070         struct Scsi_Host *shost = class_to_shost(dev);
4071         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4072         unsigned long lock_flags = 0;
4073         int len;
4074 
4075         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4076         len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->sis64);
4077         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4078         return len;
4079 }
4080 
4081 static struct device_attribute ipr_ioa_fw_type_attr = {
4082         .attr = {
4083                 .name =         "fw_type",
4084                 .mode =         S_IRUGO,
4085         },
4086         .show = ipr_show_fw_type
4087 };
4088 
4089 static struct device_attribute *ipr_ioa_attrs[] = {
4090         &ipr_fw_version_attr,
4091         &ipr_log_level_attr,
4092         &ipr_diagnostics_attr,
4093         &ipr_ioa_state_attr,
4094         &ipr_ioa_reset_attr,
4095         &ipr_update_fw_attr,
4096         &ipr_ioa_fw_type_attr,
4097         &ipr_iopoll_weight_attr,
4098         NULL,
4099 };
4100 
4101 #ifdef CONFIG_SCSI_IPR_DUMP
4102 /**
4103  * ipr_read_dump - Dump the adapter
4104  * @filp:               open sysfs file
4105  * @kobj:               kobject struct
4106  * @bin_attr:           bin_attribute struct
4107  * @buf:                buffer
4108  * @off:                offset
4109  * @count:              buffer size
4110  *
4111  * Return value:
4112  *      number of bytes printed to buffer
4113  **/
4114 static ssize_t ipr_read_dump(struct file *filp, struct kobject *kobj,
4115                              struct bin_attribute *bin_attr,
4116                              char *buf, loff_t off, size_t count)
4117 {
4118         struct device *cdev = container_of(kobj, struct device, kobj);
4119         struct Scsi_Host *shost = class_to_shost(cdev);
4120         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4121         struct ipr_dump *dump;
4122         unsigned long lock_flags = 0;
4123         char *src;
4124         int len, sdt_end;
4125         size_t rc = count;
4126 
4127         if (!capable(CAP_SYS_ADMIN))
4128                 return -EACCES;
4129 
4130         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4131         dump = ioa_cfg->dump;
4132 
4133         if (ioa_cfg->sdt_state != DUMP_OBTAINED || !dump) {
4134                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4135                 return 0;
4136         }
4137         kref_get(&dump->kref);
4138         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4139 
4140         if (off > dump->driver_dump.hdr.len) {
4141                 kref_put(&dump->kref, ipr_release_dump);
4142                 return 0;
4143         }
4144 
4145         if (off + count > dump->driver_dump.hdr.len) {
4146                 count = dump->driver_dump.hdr.len - off;
4147                 rc = count;
4148         }
4149 
4150         if (count && off < sizeof(dump->driver_dump)) {
4151                 if (off + count > sizeof(dump->driver_dump))
4152                         len = sizeof(dump->driver_dump) - off;
4153                 else
4154                         len = count;
4155                 src = (u8 *)&dump->driver_dump + off;
4156                 memcpy(buf, src, len);
4157                 buf += len;
4158                 off += len;
4159                 count -= len;
4160         }
4161 
4162         off -= sizeof(dump->driver_dump);
4163 
4164         if (ioa_cfg->sis64)
4165                 sdt_end = offsetof(struct ipr_ioa_dump, sdt.entry) +
4166                           (be32_to_cpu(dump->ioa_dump.sdt.hdr.num_entries_used) *
4167                            sizeof(struct ipr_sdt_entry));
4168         else
4169                 sdt_end = offsetof(struct ipr_ioa_dump, sdt.entry) +
4170                           (IPR_FMT2_NUM_SDT_ENTRIES * sizeof(struct ipr_sdt_entry));
4171 
4172         if (count && off < sdt_end) {
4173                 if (off + count > sdt_end)
4174                         len = sdt_end - off;
4175                 else
4176                         len = count;
4177                 src = (u8 *)&dump->ioa_dump + off;
4178                 memcpy(buf, src, len);
4179                 buf += len;
4180                 off += len;
4181                 count -= len;
4182         }
4183 
4184         off -= sdt_end;
4185 
4186         while (count) {
4187                 if ((off & PAGE_MASK) != ((off + count) & PAGE_MASK))
4188                         len = PAGE_ALIGN(off) - off;
4189                 else
4190                         len = count;
4191                 src = (u8 *)dump->ioa_dump.ioa_data[(off & PAGE_MASK) >> PAGE_SHIFT];
4192                 src += off & ~PAGE_MASK;
4193                 memcpy(buf, src, len);
4194                 buf += len;
4195                 off += len;
4196                 count -= len;
4197         }
4198 
4199         kref_put(&dump->kref, ipr_release_dump);
4200         return rc;
4201 }
4202 
4203 /**
4204  * ipr_alloc_dump - Prepare for adapter dump
4205  * @ioa_cfg:    ioa config struct
4206  *
4207  * Return value:
4208  *      0 on success / other on failure
4209  **/
4210 static int ipr_alloc_dump(struct ipr_ioa_cfg *ioa_cfg)
4211 {
4212         struct ipr_dump *dump;
4213         __be32 **ioa_data;
4214         unsigned long lock_flags = 0;
4215 
4216         dump = kzalloc(sizeof(struct ipr_dump), GFP_KERNEL);
4217 
4218         if (!dump) {
4219                 ipr_err("Dump memory allocation failed\n");
4220                 return -ENOMEM;
4221         }
4222 
4223         if (ioa_cfg->sis64)
4224                 ioa_data = vmalloc(IPR_FMT3_MAX_NUM_DUMP_PAGES * sizeof(__be32 *));
4225         else
4226                 ioa_data = vmalloc(IPR_FMT2_MAX_NUM_DUMP_PAGES * sizeof(__be32 *));
4227 
4228         if (!ioa_data) {
4229                 ipr_err("Dump memory allocation failed\n");
4230                 kfree(dump);
4231                 return -ENOMEM;
4232         }
4233 
4234         dump->ioa_dump.ioa_data = ioa_data;
4235 
4236         kref_init(&dump->kref);
4237         dump->ioa_cfg = ioa_cfg;
4238 
4239         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4240 
4241         if (INACTIVE != ioa_cfg->sdt_state) {
4242                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4243                 vfree(dump->ioa_dump.ioa_data);
4244                 kfree(dump);
4245                 return 0;
4246         }
4247 
4248         ioa_cfg->dump = dump;
4249         ioa_cfg->sdt_state = WAIT_FOR_DUMP;
4250         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead && !ioa_cfg->dump_taken) {
4251                 ioa_cfg->dump_taken = 1;
4252                 schedule_work(&ioa_cfg->work_q);
4253         }
4254         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4255 
4256         return 0;
4257 }
4258 
4259 /**
4260  * ipr_free_dump - Free adapter dump memory
4261  * @ioa_cfg:    ioa config struct
4262  *
4263  * Return value:
4264  *      0 on success / other on failure
4265  **/
4266 static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg)
4267 {
4268         struct ipr_dump *dump;
4269         unsigned long lock_flags = 0;
4270 
4271         ENTER;
4272 
4273         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4274         dump = ioa_cfg->dump;
4275         if (!dump) {
4276                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4277                 return 0;
4278         }
4279 
4280         ioa_cfg->dump = NULL;
4281         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4282 
4283         kref_put(&dump->kref, ipr_release_dump);
4284 
4285         LEAVE;
4286         return 0;
4287 }
4288 
4289 /**
4290  * ipr_write_dump - Setup dump state of adapter
4291  * @filp:               open sysfs file
4292  * @kobj:               kobject struct
4293  * @bin_attr:           bin_attribute struct
4294  * @buf:                buffer
4295  * @off:                offset
4296  * @count:              buffer size
4297  *
4298  * Return value:
4299  *      number of bytes printed to buffer
4300  **/
4301 static ssize_t ipr_write_dump(struct file *filp, struct kobject *kobj,
4302                               struct bin_attribute *bin_attr,
4303                               char *buf, loff_t off, size_t count)
4304 {
4305         struct device *cdev = container_of(kobj, struct device, kobj);
4306         struct Scsi_Host *shost = class_to_shost(cdev);
4307         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4308         int rc;
4309 
4310         if (!capable(CAP_SYS_ADMIN))
4311                 return -EACCES;
4312 
4313         if (buf[0] == '1')
4314                 rc = ipr_alloc_dump(ioa_cfg);
4315         else if (buf[0] == '')
4316                 rc = ipr_free_dump(ioa_cfg);
4317         else
4318                 return -EINVAL;
4319 
4320         if (rc)
4321                 return rc;
4322         else
4323                 return count;
4324 }
4325 
4326 static struct bin_attribute ipr_dump_attr = {
4327         .attr = {
4328                 .name = "dump",
4329                 .mode = S_IRUSR | S_IWUSR,
4330         },
4331         .size = 0,
4332         .read = ipr_read_dump,
4333         .write = ipr_write_dump
4334 };
4335 #else
4336 static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg) { return 0; };
4337 #endif
4338 
4339 /**
4340  * ipr_change_queue_depth - Change the device's queue depth
4341  * @sdev:       scsi device struct
4342  * @qdepth:     depth to set
4343  * @reason:     calling context
4344  *
4345  * Return value:
4346  *      actual depth set
4347  **/
4348 static int ipr_change_queue_depth(struct scsi_device *sdev, int qdepth)
4349 {
4350         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4351         struct ipr_resource_entry *res;
4352         unsigned long lock_flags = 0;
4353 
4354         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4355         res = (struct ipr_resource_entry *)sdev->hostdata;
4356 
4357         if (res && ipr_is_gata(res) && qdepth > IPR_MAX_CMD_PER_ATA_LUN)
4358                 qdepth = IPR_MAX_CMD_PER_ATA_LUN;
4359         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4360 
4361         scsi_change_queue_depth(sdev, qdepth);
4362         return sdev->queue_depth;
4363 }
4364 
4365 /**
4366  * ipr_show_adapter_handle - Show the adapter's resource handle for this device
4367  * @dev:        device struct
4368  * @attr:       device attribute structure
4369  * @buf:        buffer
4370  *
4371  * Return value:
4372  *      number of bytes printed to buffer
4373  **/
4374 static ssize_t ipr_show_adapter_handle(struct device *dev, struct device_attribute *attr, char *buf)
4375 {
4376         struct scsi_device *sdev = to_scsi_device(dev);
4377         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4378         struct ipr_resource_entry *res;
4379         unsigned long lock_flags = 0;
4380         ssize_t len = -ENXIO;
4381 
4382         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4383         res = (struct ipr_resource_entry *)sdev->hostdata;
4384         if (res)
4385                 len = snprintf(buf, PAGE_SIZE, "%08X\n", res->res_handle);
4386         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4387         return len;
4388 }
4389 
4390 static struct device_attribute ipr_adapter_handle_attr = {
4391         .attr = {
4392                 .name =         "adapter_handle",
4393                 .mode =         S_IRUSR,
4394         },
4395         .show = ipr_show_adapter_handle
4396 };
4397 
4398 /**
4399  * ipr_show_resource_path - Show the resource path or the resource address for
4400  *                          this device.
4401  * @dev:        device struct
4402  * @attr:       device attribute structure
4403  * @buf:        buffer
4404  *
4405  * Return value:
4406  *      number of bytes printed to buffer
4407  **/
4408 static ssize_t ipr_show_resource_path(struct device *dev, struct device_attribute *attr, char *buf)
4409 {
4410         struct scsi_device *sdev = to_scsi_device(dev);
4411         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4412         struct ipr_resource_entry *res;
4413         unsigned long lock_flags = 0;
4414         ssize_t len = -ENXIO;
4415         char buffer[IPR_MAX_RES_PATH_LENGTH];
4416 
4417         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4418         res = (struct ipr_resource_entry *)sdev->hostdata;
4419         if (res && ioa_cfg->sis64)
4420                 len = snprintf(buf, PAGE_SIZE, "%s\n",
4421                                __ipr_format_res_path(res->res_path, buffer,
4422                                                      sizeof(buffer)));
4423         else if (res)
4424                 len = snprintf(buf, PAGE_SIZE, "%d:%d:%d:%d\n", ioa_cfg->host->host_no,
4425                                res->bus, res->target, res->lun);
4426 
4427         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4428         return len;
4429 }
4430 
4431 static struct device_attribute ipr_resource_path_attr = {
4432         .attr = {
4433                 .name =         "resource_path",
4434                 .mode =         S_IRUGO,
4435         },
4436         .show = ipr_show_resource_path
4437 };
4438 
4439 /**
4440  * ipr_show_device_id - Show the device_id for this device.
4441  * @dev:        device struct
4442  * @attr:       device attribute structure
4443  * @buf:        buffer
4444  *
4445  * Return value:
4446  *      number of bytes printed to buffer
4447  **/
4448 static ssize_t ipr_show_device_id(struct device *dev, struct device_attribute *attr, char *buf)
4449 {
4450         struct scsi_device *sdev = to_scsi_device(dev);
4451         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4452         struct ipr_resource_entry *res;
4453         unsigned long lock_flags = 0;
4454         ssize_t len = -ENXIO;
4455 
4456         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4457         res = (struct ipr_resource_entry *)sdev->hostdata;
4458         if (res && ioa_cfg->sis64)
4459                 len = snprintf(buf, PAGE_SIZE, "0x%llx\n", be64_to_cpu(res->dev_id));
4460         else if (res)
4461                 len = snprintf(buf, PAGE_SIZE, "0x%llx\n", res->lun_wwn);
4462 
4463         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4464         return len;
4465 }
4466 
4467 static struct device_attribute ipr_device_id_attr = {
4468         .attr = {
4469                 .name =         "device_id",
4470                 .mode =         S_IRUGO,
4471         },
4472         .show = ipr_show_device_id
4473 };
4474 
4475 /**
4476  * ipr_show_resource_type - Show the resource type for this device.
4477  * @dev:        device struct
4478  * @attr:       device attribute structure
4479  * @buf:        buffer
4480  *
4481  * Return value:
4482  *      number of bytes printed to buffer
4483  **/
4484 static ssize_t ipr_show_resource_type(struct device *dev, struct device_attribute *attr, char *buf)
4485 {
4486         struct scsi_device *sdev = to_scsi_device(dev);
4487         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4488         struct ipr_resource_entry *res;
4489         unsigned long lock_flags = 0;
4490         ssize_t len = -ENXIO;
4491 
4492         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4493         res = (struct ipr_resource_entry *)sdev->hostdata;
4494 
4495         if (res)
4496                 len = snprintf(buf, PAGE_SIZE, "%x\n", res->type);
4497 
4498         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4499         return len;
4500 }
4501 
4502 static struct device_attribute ipr_resource_type_attr = {
4503         .attr = {
4504                 .name =         "resource_type",
4505                 .mode =         S_IRUGO,
4506         },
4507         .show = ipr_show_resource_type
4508 };
4509 
4510 /**
4511  * ipr_show_raw_mode - Show the adapter's raw mode
4512  * @dev:        class device struct
4513  * @buf:        buffer
4514  *
4515  * Return value:
4516  *      number of bytes printed to buffer
4517  **/
4518 static ssize_t ipr_show_raw_mode(struct device *dev,
4519                                  struct device_attribute *attr, char *buf)
4520 {
4521         struct scsi_device *sdev = to_scsi_device(dev);
4522         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4523         struct ipr_resource_entry *res;
4524         unsigned long lock_flags = 0;
4525         ssize_t len;
4526 
4527         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4528         res = (struct ipr_resource_entry *)sdev->hostdata;
4529         if (res)
4530                 len = snprintf(buf, PAGE_SIZE, "%d\n", res->raw_mode);
4531         else
4532                 len = -ENXIO;
4533         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4534         return len;
4535 }
4536 
4537 /**
4538  * ipr_store_raw_mode - Change the adapter's raw mode
4539  * @dev:        class device struct
4540  * @buf:        buffer
4541  *
4542  * Return value:
4543  *      number of bytes printed to buffer
4544  **/
4545 static ssize_t ipr_store_raw_mode(struct device *dev,
4546                                   struct device_attribute *attr,
4547                                   const char *buf, size_t count)
4548 {
4549         struct scsi_device *sdev = to_scsi_device(dev);
4550         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4551         struct ipr_resource_entry *res;
4552         unsigned long lock_flags = 0;
4553         ssize_t len;
4554 
4555         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4556         res = (struct ipr_resource_entry *)sdev->hostdata;
4557         if (res) {
4558                 if (ipr_is_af_dasd_device(res)) {
4559                         res->raw_mode = simple_strtoul(buf, NULL, 10);
4560                         len = strlen(buf);
4561                         if (res->sdev)
4562                                 sdev_printk(KERN_INFO, res->sdev, "raw mode is %s\n",
4563                                         res->raw_mode ? "enabled" : "disabled");
4564                 } else
4565                         len = -EINVAL;
4566         } else
4567                 len = -ENXIO;
4568         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4569         return len;
4570 }
4571 
4572 static struct device_attribute ipr_raw_mode_attr = {
4573         .attr = {
4574                 .name =         "raw_mode",
4575                 .mode =         S_IRUGO | S_IWUSR,
4576         },
4577         .show = ipr_show_raw_mode,
4578         .store = ipr_store_raw_mode
4579 };
4580 
4581 static struct device_attribute *ipr_dev_attrs[] = {
4582         &ipr_adapter_handle_attr,
4583         &ipr_resource_path_attr,
4584         &ipr_device_id_attr,
4585         &ipr_resource_type_attr,
4586         &ipr_raw_mode_attr,
4587         NULL,
4588 };
4589 
4590 /**
4591  * ipr_biosparam - Return the HSC mapping
4592  * @sdev:                       scsi device struct
4593  * @block_device:       block device pointer
4594  * @capacity:           capacity of the device
4595  * @parm:                       Array containing returned HSC values.
4596  *
4597  * This function generates the HSC parms that fdisk uses.
4598  * We want to make sure we return something that places partitions
4599  * on 4k boundaries for best performance with the IOA.
4600  *
4601  * Return value:
4602  *      0 on success
4603  **/
4604 static int ipr_biosparam(struct scsi_device *sdev,
4605                          struct block_device *block_device,
4606                          sector_t capacity, int *parm)
4607 {
4608         int heads, sectors;
4609         sector_t cylinders;
4610 
4611         heads = 128;
4612         sectors = 32;
4613 
4614         cylinders = capacity;
4615         sector_div(cylinders, (128 * 32));
4616 
4617         /* return result */
4618         parm[0] = heads;
4619         parm[1] = sectors;
4620         parm[2] = cylinders;
4621 
4622         return 0;
4623 }
4624 
4625 /**
4626  * ipr_find_starget - Find target based on bus/target.
4627  * @starget:    scsi target struct
4628  *
4629  * Return value:
4630  *      resource entry pointer if found / NULL if not found
4631  **/
4632 static struct ipr_resource_entry *ipr_find_starget(struct scsi_target *starget)
4633 {
4634         struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4635         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4636         struct ipr_resource_entry *res;
4637 
4638         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
4639                 if ((res->bus == starget->channel) &&
4640                     (res->target == starget->id)) {
4641                         return res;
4642                 }
4643         }
4644 
4645         return NULL;
4646 }
4647 
4648 static struct ata_port_info sata_port_info;
4649 
4650 /**
4651  * ipr_target_alloc - Prepare for commands to a SCSI target
4652  * @starget:    scsi target struct
4653  *
4654  * If the device is a SATA device, this function allocates an
4655  * ATA port with libata, else it does nothing.
4656  *
4657  * Return value:
4658  *      0 on success / non-0 on failure
4659  **/
4660 static int ipr_target_alloc(struct scsi_target *starget)
4661 {
4662         struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4663         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4664         struct ipr_sata_port *sata_port;
4665         struct ata_port *ap;
4666         struct ipr_resource_entry *res;
4667         unsigned long lock_flags;
4668 
4669         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4670         res = ipr_find_starget(starget);
4671         starget->hostdata = NULL;
4672 
4673         if (res && ipr_is_gata(res)) {
4674                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4675                 sata_port = kzalloc(sizeof(*sata_port), GFP_KERNEL);
4676                 if (!sata_port)
4677                         return -ENOMEM;
4678 
4679                 ap = ata_sas_port_alloc(&ioa_cfg->ata_host, &sata_port_info, shost);
4680                 if (ap) {
4681                         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4682                         sata_port->ioa_cfg = ioa_cfg;
4683                         sata_port->ap = ap;
4684                         sata_port->res = res;
4685 
4686                         res->sata_port = sata_port;
4687                         ap->private_data = sata_port;
4688                         starget->hostdata = sata_port;
4689                 } else {
4690                         kfree(sata_port);
4691                         return -ENOMEM;
4692                 }
4693         }
4694         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4695 
4696         return 0;
4697 }
4698 
4699 /**
4700  * ipr_target_destroy - Destroy a SCSI target
4701  * @starget:    scsi target struct
4702  *
4703  * If the device was a SATA device, this function frees the libata
4704  * ATA port, else it does nothing.
4705  *
4706  **/
4707 static void ipr_target_destroy(struct scsi_target *starget)
4708 {
4709         struct ipr_sata_port *sata_port = starget->hostdata;
4710         struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4711         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4712 
4713         if (ioa_cfg->sis64) {
4714                 if (!ipr_find_starget(starget)) {
4715                         if (starget->channel == IPR_ARRAY_VIRTUAL_BUS)
4716                                 clear_bit(starget->id, ioa_cfg->array_ids);
4717                         else if (starget->channel == IPR_VSET_VIRTUAL_BUS)
4718                                 clear_bit(starget->id, ioa_cfg->vset_ids);
4719                         else if (starget->channel == 0)
4720                                 clear_bit(starget->id, ioa_cfg->target_ids);
4721                 }
4722         }
4723 
4724         if (sata_port) {
4725                 starget->hostdata = NULL;
4726                 ata_sas_port_destroy(sata_port->ap);
4727                 kfree(sata_port);
4728         }
4729 }
4730 
4731 /**
4732  * ipr_find_sdev - Find device based on bus/target/lun.
4733  * @sdev:       scsi device struct
4734  *
4735  * Return value:
4736  *      resource entry pointer if found / NULL if not found
4737  **/
4738 static struct ipr_resource_entry *ipr_find_sdev(struct scsi_device *sdev)
4739 {
4740         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4741         struct ipr_resource_entry *res;
4742 
4743         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
4744                 if ((res->bus == sdev->channel) &&
4745                     (res->target == sdev->id) &&
4746                     (res->lun == sdev->lun))
4747                         return res;
4748         }
4749 
4750         return NULL;
4751 }
4752 
4753 /**
4754  * ipr_slave_destroy - Unconfigure a SCSI device
4755  * @sdev:       scsi device struct
4756  *
4757  * Return value:
4758  *      nothing
4759  **/
4760 static void ipr_slave_destroy(struct scsi_device *sdev)
4761 {
4762         struct ipr_resource_entry *res;
4763         struct ipr_ioa_cfg *ioa_cfg;
4764         unsigned long lock_flags = 0;
4765 
4766         ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4767 
4768         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4769         res = (struct ipr_resource_entry *) sdev->hostdata;
4770         if (res) {
4771                 if (res->sata_port)
4772                         res->sata_port->ap->link.device[0].class = ATA_DEV_NONE;
4773                 sdev->hostdata = NULL;
4774                 res->sdev = NULL;
4775                 res->sata_port = NULL;
4776         }
4777         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4778 }
4779 
4780 /**
4781  * ipr_slave_configure - Configure a SCSI device
4782  * @sdev:       scsi device struct
4783  *
4784  * This function configures the specified scsi device.
4785  *
4786  * Return value:
4787  *      0 on success
4788  **/
4789 static int ipr_slave_configure(struct scsi_device *sdev)
4790 {
4791         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4792         struct ipr_resource_entry *res;
4793         struct ata_port *ap = NULL;
4794         unsigned long lock_flags = 0;
4795         char buffer[IPR_MAX_RES_PATH_LENGTH];
4796 
4797         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4798         res = sdev->hostdata;
4799         if (res) {
4800                 if (ipr_is_af_dasd_device(res))
4801                         sdev->type = TYPE_RAID;
4802                 if (ipr_is_af_dasd_device(res) || ipr_is_ioa_resource(res)) {
4803                         sdev->scsi_level = 4;
4804                         sdev->no_uld_attach = 1;
4805                 }
4806                 if (ipr_is_vset_device(res)) {
4807                         sdev->scsi_level = SCSI_SPC_3;
4808                         blk_queue_rq_timeout(sdev->request_queue,
4809                                              IPR_VSET_RW_TIMEOUT);
4810                         blk_queue_max_hw_sectors(sdev->request_queue, IPR_VSET_MAX_SECTORS);
4811                 }
4812                 if (ipr_is_gata(res) && res->sata_port)
4813                         ap = res->sata_port->ap;
4814                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4815 
4816                 if (ap) {
4817                         scsi_change_queue_depth(sdev, IPR_MAX_CMD_PER_ATA_LUN);
4818                         ata_sas_slave_configure(sdev, ap);
4819                 }
4820 
4821                 if (ioa_cfg->sis64)
4822                         sdev_printk(KERN_INFO, sdev, "Resource path: %s\n",
4823                                     ipr_format_res_path(ioa_cfg,
4824                                 res->res_path, buffer, sizeof(buffer)));
4825                 return 0;
4826         }
4827         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4828         return 0;
4829 }
4830 
4831 /**
4832  * ipr_ata_slave_alloc - Prepare for commands to a SATA device
4833  * @sdev:       scsi device struct
4834  *
4835  * This function initializes an ATA port so that future commands
4836  * sent through queuecommand will work.
4837  *
4838  * Return value:
4839  *      0 on success
4840  **/
4841 static int ipr_ata_slave_alloc(struct scsi_device *sdev)
4842 {
4843         struct ipr_sata_port *sata_port = NULL;
4844         int rc = -ENXIO;
4845 
4846         ENTER;
4847         if (sdev->sdev_target)
4848                 sata_port = sdev->sdev_target->hostdata;
4849         if (sata_port) {
4850                 rc = ata_sas_port_init(sata_port->ap);
4851                 if (rc == 0)
4852                         rc = ata_sas_sync_probe(sata_port->ap);
4853         }
4854 
4855         if (rc)
4856                 ipr_slave_destroy(sdev);
4857 
4858         LEAVE;
4859         return rc;
4860 }
4861 
4862 /**
4863  * ipr_slave_alloc - Prepare for commands to a device.
4864  * @sdev:       scsi device struct
4865  *
4866  * This function saves a pointer to the resource entry
4867  * in the scsi device struct if the device exists. We
4868  * can then use this pointer in ipr_queuecommand when
4869  * handling new commands.
4870  *
4871  * Return value:
4872  *      0 on success / -ENXIO if device does not exist
4873  **/
4874 static int ipr_slave_alloc(struct scsi_device *sdev)
4875 {
4876         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4877         struct ipr_resource_entry *res;
4878         unsigned long lock_flags;
4879         int rc = -ENXIO;
4880 
4881         sdev->hostdata = NULL;
4882 
4883         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4884 
4885         res = ipr_find_sdev(sdev);
4886         if (res) {
4887                 res->sdev = sdev;
4888                 res->add_to_ml = 0;
4889                 res->in_erp = 0;
4890                 sdev->hostdata = res;
4891                 if (!ipr_is_naca_model(res))
4892                         res->needs_sync_complete = 1;
4893                 rc = 0;
4894                 if (ipr_is_gata(res)) {
4895                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4896                         return ipr_ata_slave_alloc(sdev);
4897                 }
4898         }
4899 
4900         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4901 
4902         return rc;
4903 }
4904 
4905 /**
4906  * ipr_match_lun - Match function for specified LUN
4907  * @ipr_cmd:    ipr command struct
4908  * @device:             device to match (sdev)
4909  *
4910  * Returns:
4911  *      1 if command matches sdev / 0 if command does not match sdev
4912  **/
4913 static int ipr_match_lun(struct ipr_cmnd *ipr_cmd, void *device)
4914 {
4915         if (ipr_cmd->scsi_cmd && ipr_cmd->scsi_cmd->device == device)
4916                 return 1;
4917         return 0;
4918 }
4919 
4920 /**
4921  * ipr_wait_for_ops - Wait for matching commands to complete
4922  * @ipr_cmd:    ipr command struct
4923  * @device:             device to match (sdev)
4924  * @match:              match function to use
4925  *
4926  * Returns:
4927  *      SUCCESS / FAILED
4928  **/
4929 static int ipr_wait_for_ops(struct ipr_ioa_cfg *ioa_cfg, void *device,
4930                             int (*match)(struct ipr_cmnd *, void *))
4931 {
4932         struct ipr_cmnd *ipr_cmd;
4933         int wait;
4934         unsigned long flags;
4935         struct ipr_hrr_queue *hrrq;
4936         signed long timeout = IPR_ABORT_TASK_TIMEOUT;
4937         DECLARE_COMPLETION_ONSTACK(comp);
4938 
4939         ENTER;
4940         do {
4941                 wait = 0;
4942 
4943                 for_each_hrrq(hrrq, ioa_cfg) {
4944                         spin_lock_irqsave(hrrq->lock, flags);
4945                         list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
4946                                 if (match(ipr_cmd, device)) {
4947                                         ipr_cmd->eh_comp = &comp;
4948                                         wait++;
4949                                 }
4950                         }
4951                         spin_unlock_irqrestore(hrrq->lock, flags);
4952                 }
4953 
4954                 if (wait) {
4955                         timeout = wait_for_completion_timeout(&comp, timeout);
4956 
4957                         if (!timeout) {
4958                                 wait = 0;
4959 
4960                                 for_each_hrrq(hrrq, ioa_cfg) {
4961                                         spin_lock_irqsave(hrrq->lock, flags);
4962                                         list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
4963                                                 if (match(ipr_cmd, device)) {
4964                                                         ipr_cmd->eh_comp = NULL;
4965                                                         wait++;
4966                                                 }
4967                                         }
4968                                         spin_unlock_irqrestore(hrrq->lock, flags);
4969                                 }
4970 
4971                                 if (wait)
4972                                         dev_err(&ioa_cfg->pdev->dev, "Timed out waiting for aborted commands\n");
4973                                 LEAVE;
4974                                 return wait ? FAILED : SUCCESS;
4975                         }
4976                 }
4977         } while (wait);
4978 
4979         LEAVE;
4980         return SUCCESS;
4981 }
4982 
4983 static int ipr_eh_host_reset(struct scsi_cmnd *cmd)
4984 {
4985         struct ipr_ioa_cfg *ioa_cfg;
4986         unsigned long lock_flags = 0;
4987         int rc = SUCCESS;
4988 
4989         ENTER;
4990         ioa_cfg = (struct ipr_ioa_cfg *) cmd->device->host->hostdata;
4991         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4992 
4993         if (!ioa_cfg->in_reset_reload && !ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
4994                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_ABBREV);
4995                 dev_err(&ioa_cfg->pdev->dev,
4996                         "Adapter being reset as a result of error recovery.\n");
4997 
4998                 if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
4999                         ioa_cfg->sdt_state = GET_DUMP;
5000         }
5001 
5002         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5003         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
5004         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5005 
5006         /* If we got hit with a host reset while we were already resetting
5007          the adapter for some reason, and the reset failed. */
5008         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
5009                 ipr_trace;
5010                 rc = FAILED;
5011         }
5012 
5013         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5014         LEAVE;
5015         return rc;
5016 }
5017 
5018 /**
5019  * ipr_device_reset - Reset the device
5020  * @ioa_cfg:    ioa config struct
5021  * @res:                resource entry struct
5022  *
5023  * This function issues a device reset to the affected device.
5024  * If the device is a SCSI device, a LUN reset will be sent
5025  * to the device first. If that does not work, a target reset
5026  * will be sent. If the device is a SATA device, a PHY reset will
5027  * be sent.
5028  *
5029  * Return value:
5030  *      0 on success / non-zero on failure
5031  **/
5032 static int ipr_device_reset(struct ipr_ioa_cfg *ioa_cfg,
5033                             struct ipr_resource_entry *res)
5034 {
5035         struct ipr_cmnd *ipr_cmd;
5036         struct ipr_ioarcb *ioarcb;
5037         struct ipr_cmd_pkt *cmd_pkt;
5038         struct ipr_ioarcb_ata_regs *regs;
5039         u32 ioasc;
5040 
5041         ENTER;
5042         ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
5043         ioarcb = &ipr_cmd->ioarcb;
5044         cmd_pkt = &ioarcb->cmd_pkt;
5045 
5046         if (ipr_cmd->ioa_cfg->sis64) {
5047                 regs = &ipr_cmd->i.ata_ioadl.regs;
5048                 ioarcb->add_cmd_parms_offset = cpu_to_be16(sizeof(*ioarcb));
5049         } else
5050                 regs = &ioarcb->u.add_data.u.regs;
5051 
5052         ioarcb->res_handle = res->res_handle;
5053         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5054         cmd_pkt->cdb[0] = IPR_RESET_DEVICE;
5055         if (ipr_is_gata(res)) {
5056                 cmd_pkt->cdb[2] = IPR_ATA_PHY_RESET;
5057                 ioarcb->add_cmd_parms_len = cpu_to_be16(sizeof(regs->flags));
5058                 regs->flags |= IPR_ATA_FLAG_STATUS_ON_GOOD_COMPLETION;
5059         }
5060 
5061         ipr_send_blocking_cmd(ipr_cmd, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
5062         ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5063         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5064         if (ipr_is_gata(res) && res->sata_port && ioasc != IPR_IOASC_IOA_WAS_RESET) {
5065                 if (ipr_cmd->ioa_cfg->sis64)
5066                         memcpy(&res->sata_port->ioasa, &ipr_cmd->s.ioasa64.u.gata,
5067                                sizeof(struct ipr_ioasa_gata));
5068                 else
5069                         memcpy(&res->sata_port->ioasa, &ipr_cmd->s.ioasa.u.gata,
5070                                sizeof(struct ipr_ioasa_gata));
5071         }
5072 
5073         LEAVE;
5074         return IPR_IOASC_SENSE_KEY(ioasc) ? -EIO : 0;
5075 }
5076 
5077 /**
5078  * ipr_sata_reset - Reset the SATA port
5079  * @link:       SATA link to reset
5080  * @classes:    class of the attached device
5081  *
5082  * This function issues a SATA phy reset to the affected ATA link.
5083  *
5084  * Return value:
5085  *      0 on success / non-zero on failure
5086  **/
5087 static int ipr_sata_reset(struct ata_link *link, unsigned int *classes,
5088                                 unsigned long deadline)
5089 {
5090         struct ipr_sata_port *sata_port = link->ap->private_data;
5091         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
5092         struct ipr_resource_entry *res;
5093         unsigned long lock_flags = 0;
5094         int rc = -ENXIO;
5095 
5096         ENTER;
5097         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5098         while (ioa_cfg->in_reset_reload) {
5099                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5100                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
5101                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5102         }
5103 
5104         res = sata_port->res;
5105         if (res) {
5106                 rc = ipr_device_reset(ioa_cfg, res);
5107                 *classes = res->ata_class;
5108         }
5109 
5110         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5111         LEAVE;
5112         return rc;
5113 }
5114 
5115 /**
5116  * ipr_eh_dev_reset - Reset the device
5117  * @scsi_cmd:   scsi command struct
5118  *
5119  * This function issues a device reset to the affected device.
5120  * A LUN reset will be sent to the device first. If that does
5121  * not work, a target reset will be sent.
5122  *
5123  * Return value:
5124  *      SUCCESS / FAILED
5125  **/
5126 static int __ipr_eh_dev_reset(struct scsi_cmnd *scsi_cmd)
5127 {
5128         struct ipr_cmnd *ipr_cmd;
5129         struct ipr_ioa_cfg *ioa_cfg;
5130         struct ipr_resource_entry *res;
5131         struct ata_port *ap;
5132         int rc = 0;
5133         struct ipr_hrr_queue *hrrq;
5134 
5135         ENTER;
5136         ioa_cfg = (struct ipr_ioa_cfg *) scsi_cmd->device->host->hostdata;
5137         res = scsi_cmd->device->hostdata;
5138 
5139         if (!res)
5140                 return FAILED;
5141 
5142         /*
5143          * If we are currently going through reset/reload, return failed. This will force the
5144          * mid-layer to call ipr_eh_host_reset, which will then go to sleep and wait for the
5145          * reset to complete
5146          */
5147         if (ioa_cfg->in_reset_reload)
5148                 return FAILED;
5149         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
5150                 return FAILED;
5151 
5152         for_each_hrrq(hrrq, ioa_cfg) {
5153                 spin_lock(&hrrq->_lock);
5154                 list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
5155                         if (ipr_cmd->ioarcb.res_handle == res->res_handle) {
5156                                 if (ipr_cmd->scsi_cmd)
5157                                         ipr_cmd->done = ipr_scsi_eh_done;
5158                                 if (ipr_cmd->qc)
5159                                         ipr_cmd->done = ipr_sata_eh_done;
5160                                 if (ipr_cmd->qc &&
5161                                     !(ipr_cmd->qc->flags & ATA_QCFLAG_FAILED)) {
5162                                         ipr_cmd->qc->err_mask |= AC_ERR_TIMEOUT;
5163                                         ipr_cmd->qc->flags |= ATA_QCFLAG_FAILED;
5164                                 }
5165                         }
5166                 }
5167                 spin_unlock(&hrrq->_lock);
5168         }
5169         res->resetting_device = 1;
5170         scmd_printk(KERN_ERR, scsi_cmd, "Resetting device\n");
5171 
5172         if (ipr_is_gata(res) && res->sata_port) {
5173                 ap = res->sata_port->ap;
5174                 spin_unlock_irq(scsi_cmd->device->host->host_lock);
5175                 ata_std_error_handler(ap);
5176                 spin_lock_irq(scsi_cmd->device->host->host_lock);
5177 
5178                 for_each_hrrq(hrrq, ioa_cfg) {
5179                         spin_lock(&hrrq->_lock);
5180                         list_for_each_entry(ipr_cmd,
5181                                             &hrrq->hrrq_pending_q, queue) {
5182                                 if (ipr_cmd->ioarcb.res_handle ==
5183                                     res->res_handle) {
5184                                         rc = -EIO;
5185                                         break;
5186                                 }
5187                         }
5188                         spin_unlock(&hrrq->_lock);
5189                 }
5190         } else
5191                 rc = ipr_device_reset(ioa_cfg, res);
5192         res->resetting_device = 0;
5193         res->reset_occurred = 1;
5194 
5195         LEAVE;
5196         return rc ? FAILED : SUCCESS;
5197 }
5198 
5199 static int ipr_eh_dev_reset(struct scsi_cmnd *cmd)
5200 {
5201         int rc;
5202         struct ipr_ioa_cfg *ioa_cfg;
5203 
5204         ioa_cfg = (struct ipr_ioa_cfg *) cmd->device->host->hostdata;
5205 
5206         spin_lock_irq(cmd->device->host->host_lock);
5207         rc = __ipr_eh_dev_reset(cmd);
5208         spin_unlock_irq(cmd->device->host->host_lock);
5209 
5210         if (rc == SUCCESS)
5211                 rc = ipr_wait_for_ops(ioa_cfg, cmd->device, ipr_match_lun);
5212 
5213         return rc;
5214 }
5215 
5216 /**
5217  * ipr_bus_reset_done - Op done function for bus reset.
5218  * @ipr_cmd:    ipr command struct
5219  *
5220  * This function is the op done function for a bus reset
5221  *
5222  * Return value:
5223  *      none
5224  **/
5225 static void ipr_bus_reset_done(struct ipr_cmnd *ipr_cmd)
5226 {
5227         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
5228         struct ipr_resource_entry *res;
5229 
5230         ENTER;
5231         if (!ioa_cfg->sis64)
5232                 list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
5233                         if (res->res_handle == ipr_cmd->ioarcb.res_handle) {
5234                                 scsi_report_bus_reset(ioa_cfg->host, res->bus);
5235                                 break;
5236                         }
5237                 }
5238 
5239         /*
5240          * If abort has not completed, indicate the reset has, else call the
5241          * abort's done function to wake the sleeping eh thread
5242          */
5243         if (ipr_cmd->sibling->sibling)
5244                 ipr_cmd->sibling->sibling = NULL;
5245         else
5246                 ipr_cmd->sibling->done(ipr_cmd->sibling);
5247 
5248         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5249         LEAVE;
5250 }
5251 
5252 /**
5253  * ipr_abort_timeout - An abort task has timed out
5254  * @ipr_cmd:    ipr command struct
5255  *
5256  * This function handles when an abort task times out. If this
5257  * happens we issue a bus reset since we have resources tied
5258  * up that must be freed before returning to the midlayer.
5259  *
5260  * Return value:
5261  *      none
5262  **/
5263 static void ipr_abort_timeout(struct ipr_cmnd *ipr_cmd)
5264 {
5265         struct ipr_cmnd *reset_cmd;
5266         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
5267         struct ipr_cmd_pkt *cmd_pkt;
5268         unsigned long lock_flags = 0;
5269 
5270         ENTER;
5271         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5272         if (ipr_cmd->completion.done || ioa_cfg->in_reset_reload) {
5273                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5274                 return;
5275         }
5276 
5277         sdev_printk(KERN_ERR, ipr_cmd->u.sdev, "Abort timed out. Resetting bus.\n");
5278         reset_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
5279         ipr_cmd->sibling = reset_cmd;
5280         reset_cmd->sibling = ipr_cmd;
5281         reset_cmd->ioarcb.res_handle = ipr_cmd->ioarcb.res_handle;
5282         cmd_pkt = &reset_cmd->ioarcb.cmd_pkt;
5283         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5284         cmd_pkt->cdb[0] = IPR_RESET_DEVICE;
5285         cmd_pkt->cdb[2] = IPR_RESET_TYPE_SELECT | IPR_BUS_RESET;
5286 
5287         ipr_do_req(reset_cmd, ipr_bus_reset_done, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
5288         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5289         LEAVE;
5290 }
5291 
5292 /**
5293  * ipr_cancel_op - Cancel specified op
5294  * @scsi_cmd:   scsi command struct
5295  *
5296  * This function cancels specified op.
5297  *
5298  * Return value:
5299  *      SUCCESS / FAILED
5300  **/
5301 static int ipr_cancel_op(struct scsi_cmnd *scsi_cmd)
5302 {
5303         struct ipr_cmnd *ipr_cmd;
5304         struct ipr_ioa_cfg *ioa_cfg;
5305         struct ipr_resource_entry *res;
5306         struct ipr_cmd_pkt *cmd_pkt;
5307         u32 ioasc, int_reg;
5308         int op_found = 0;
5309         struct ipr_hrr_queue *hrrq;
5310 
5311         ENTER;
5312         ioa_cfg = (struct ipr_ioa_cfg *)scsi_cmd->device->host->hostdata;
5313         res = scsi_cmd->device->hostdata;
5314 
5315         /* If we are currently going through reset/reload, return failed.
5316          * This will force the mid-layer to call ipr_eh_host_reset,
5317          * which will then go to sleep and wait for the reset to complete
5318          */
5319         if (ioa_cfg->in_reset_reload ||
5320             ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
5321                 return FAILED;
5322         if (!res)
5323                 return FAILED;
5324 
5325         /*
5326          * If we are aborting a timed out op, chances are that the timeout was caused
5327          * by a still not detected EEH error. In such cases, reading a register will
5328          * trigger the EEH recovery infrastructure.
5329          */
5330         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
5331 
5332         if (!ipr_is_gscsi(res))
5333                 return FAILED;
5334 
5335         for_each_hrrq(hrrq, ioa_cfg) {
5336                 spin_lock(&hrrq->_lock);
5337                 list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
5338                         if (ipr_cmd->scsi_cmd == scsi_cmd) {
5339                                 ipr_cmd->done = ipr_scsi_eh_done;
5340                                 op_found = 1;
5341                                 break;
5342                         }
5343                 }
5344                 spin_unlock(&hrrq->_lock);
5345         }
5346 
5347         if (!op_found)
5348                 return SUCCESS;
5349 
5350         ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
5351         ipr_cmd->ioarcb.res_handle = res->res_handle;
5352         cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5353         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5354         cmd_pkt->cdb[0] = IPR_CANCEL_ALL_REQUESTS;
5355         ipr_cmd->u.sdev = scsi_cmd->device;
5356 
5357         scmd_printk(KERN_ERR, scsi_cmd, "Aborting command: %02X\n",
5358                     scsi_cmd->cmnd[0]);
5359         ipr_send_blocking_cmd(ipr_cmd, ipr_abort_timeout, IPR_CANCEL_ALL_TIMEOUT);
5360         ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5361 
5362         /*
5363          * If the abort task timed out and we sent a bus reset, we will get
5364          * one the following responses to the abort
5365          */
5366         if (ioasc == IPR_IOASC_BUS_WAS_RESET || ioasc == IPR_IOASC_SYNC_REQUIRED) {
5367                 ioasc = 0;
5368                 ipr_trace;
5369         }
5370 
5371         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5372         if (!ipr_is_naca_model(res))
5373                 res->needs_sync_complete = 1;
5374 
5375         LEAVE;
5376         return IPR_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
5377 }
5378 
5379 /**
5380  * ipr_eh_abort - Abort a single op
5381  * @scsi_cmd:   scsi command struct
5382  *
5383  * Return value:
5384  *      0 if scan in progress / 1 if scan is complete
5385  **/
5386 static int ipr_scan_finished(struct Scsi_Host *shost, unsigned long elapsed_time)
5387 {
5388         unsigned long lock_flags;
5389         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
5390         int rc = 0;
5391 
5392         spin_lock_irqsave(shost->host_lock, lock_flags);
5393         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead || ioa_cfg->scan_done)
5394                 rc = 1;
5395         if ((elapsed_time/HZ) > (ioa_cfg->transop_timeout * 2))
5396                 rc = 1;
5397         spin_unlock_irqrestore(shost->host_lock, lock_flags);
5398         return rc;
5399 }
5400 
5401 /**
5402  * ipr_eh_host_reset - Reset the host adapter
5403  * @scsi_cmd:   scsi command struct
5404  *
5405  * Return value:
5406  *      SUCCESS / FAILED
5407  **/
5408 static int ipr_eh_abort(struct scsi_cmnd *scsi_cmd)
5409 {
5410         unsigned long flags;
5411         int rc;
5412         struct ipr_ioa_cfg *ioa_cfg;
5413 
5414         ENTER;
5415 
5416         ioa_cfg = (struct ipr_ioa_cfg *) scsi_cmd->device->host->hostdata;
5417 
5418         spin_lock_irqsave(scsi_cmd->device->host->host_lock, flags);
5419         rc = ipr_cancel_op(scsi_cmd);
5420         spin_unlock_irqrestore(scsi_cmd->device->host->host_lock, flags);
5421 
5422         if (rc == SUCCESS)
5423                 rc = ipr_wait_for_ops(ioa_cfg, scsi_cmd->device, ipr_match_lun);
5424         LEAVE;
5425         return rc;
5426 }
5427 
5428 /**
5429  * ipr_handle_other_interrupt - Handle "other" interrupts
5430  * @ioa_cfg:    ioa config struct
5431  * @int_reg:    interrupt register
5432  *
5433  * Return value:
5434  *      IRQ_NONE / IRQ_HANDLED
5435  **/
5436 static irqreturn_t ipr_handle_other_interrupt(struct ipr_ioa_cfg *ioa_cfg,
5437                                               u32 int_reg)
5438 {
5439         irqreturn_t rc = IRQ_HANDLED;
5440         u32 int_mask_reg;
5441 
5442         int_mask_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg32);
5443         int_reg &= ~int_mask_reg;
5444 
5445         /* If an interrupt on the adapter did not occur, ignore it.
5446          * Or in the case of SIS 64, check for a stage change interrupt.
5447          */
5448         if ((int_reg & IPR_PCII_OPER_INTERRUPTS) == 0) {
5449                 if (ioa_cfg->sis64) {
5450                         int_mask_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
5451                         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg) & ~int_mask_reg;
5452                         if (int_reg & IPR_PCII_IPL_STAGE_CHANGE) {
5453 
5454                                 /* clear stage change */
5455                                 writel(IPR_PCII_IPL_STAGE_CHANGE, ioa_cfg->regs.clr_interrupt_reg);
5456                                 int_reg = readl(ioa_cfg->regs.sense_interrupt_reg) & ~int_mask_reg;
5457                                 list_del(&ioa_cfg->reset_cmd->queue);
5458                                 del_timer(&ioa_cfg->reset_cmd->timer);
5459                                 ipr_reset_ioa_job(ioa_cfg->reset_cmd);
5460                                 return IRQ_HANDLED;
5461                         }
5462                 }
5463 
5464                 return IRQ_NONE;
5465         }
5466 
5467         if (int_reg & IPR_PCII_IOA_TRANS_TO_OPER) {
5468                 /* Mask the interrupt */
5469                 writel(IPR_PCII_IOA_TRANS_TO_OPER, ioa_cfg->regs.set_interrupt_mask_reg);
5470                 int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
5471 
5472                 list_del(&ioa_cfg->reset_cmd->queue);
5473                 del_timer(&ioa_cfg->reset_cmd->timer);
5474                 ipr_reset_ioa_job(ioa_cfg->reset_cmd);
5475         } else if ((int_reg & IPR_PCII_HRRQ_UPDATED) == int_reg) {
5476                 if (ioa_cfg->clear_isr) {
5477                         if (ipr_debug && printk_ratelimit())
5478                                 dev_err(&ioa_cfg->pdev->dev,
5479                                         "Spurious interrupt detected. 0x%08X\n", int_reg);
5480                         writel(IPR_PCII_HRRQ_UPDATED, ioa_cfg->regs.clr_interrupt_reg32);
5481                         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5482                         return IRQ_NONE;
5483                 }
5484         } else {
5485                 if (int_reg & IPR_PCII_IOA_UNIT_CHECKED)
5486                         ioa_cfg->ioa_unit_checked = 1;
5487                 else if (int_reg & IPR_PCII_NO_HOST_RRQ)
5488                         dev_err(&ioa_cfg->pdev->dev,
5489                                 "No Host RRQ. 0x%08X\n", int_reg);
5490                 else
5491                         dev_err(&ioa_cfg->pdev->dev,
5492                                 "Permanent IOA failure. 0x%08X\n", int_reg);
5493 
5494                 if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
5495                         ioa_cfg->sdt_state = GET_DUMP;
5496 
5497                 ipr_mask_and_clear_interrupts(ioa_cfg, ~0);
5498                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
5499         }
5500 
5501         return rc;
5502 }
5503 
5504 /**
5505  * ipr_isr_eh - Interrupt service routine error handler
5506  * @ioa_cfg:    ioa config struct
5507  * @msg:        message to log
5508  *
5509  * Return value:
5510  *      none
5511  **/
5512 static void ipr_isr_eh(struct ipr_ioa_cfg *ioa_cfg, char *msg, u16 number)
5513 {
5514         ioa_cfg->errors_logged++;
5515         dev_err(&ioa_cfg->pdev->dev, "%s %d\n", msg, number);
5516 
5517         if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
5518                 ioa_cfg->sdt_state = GET_DUMP;
5519 
5520         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
5521 }
5522 
5523 static int ipr_process_hrrq(struct ipr_hrr_queue *hrr_queue, int budget,
5524                                                 struct list_head *doneq)
5525 {
5526         u32 ioasc;
5527         u16 cmd_index;
5528         struct ipr_cmnd *ipr_cmd;
5529         struct ipr_ioa_cfg *ioa_cfg = hrr_queue->ioa_cfg;
5530         int num_hrrq = 0;
5531 
5532         /* If interrupts are disabled, ignore the interrupt */
5533         if (!hrr_queue->allow_interrupts)
5534                 return 0;
5535 
5536         while ((be32_to_cpu(*hrr_queue->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5537                hrr_queue->toggle_bit) {
5538 
5539                 cmd_index = (be32_to_cpu(*hrr_queue->hrrq_curr) &
5540                              IPR_HRRQ_REQ_RESP_HANDLE_MASK) >>
5541                              IPR_HRRQ_REQ_RESP_HANDLE_SHIFT;
5542 
5543                 if (unlikely(cmd_index > hrr_queue->max_cmd_id ||
5544                              cmd_index < hrr_queue->min_cmd_id)) {
5545                         ipr_isr_eh(ioa_cfg,
5546                                 "Invalid response handle from IOA: ",
5547                                 cmd_index);
5548                         break;
5549                 }
5550 
5551                 ipr_cmd = ioa_cfg->ipr_cmnd_list[cmd_index];
5552                 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5553 
5554                 ipr_trc_hook(ipr_cmd, IPR_TRACE_FINISH, ioasc);
5555 
5556                 list_move_tail(&ipr_cmd->queue, doneq);
5557 
5558                 if (hrr_queue->hrrq_curr < hrr_queue->hrrq_end) {
5559                         hrr_queue->hrrq_curr++;
5560                 } else {
5561                         hrr_queue->hrrq_curr = hrr_queue->hrrq_start;
5562                         hrr_queue->toggle_bit ^= 1u;
5563                 }
5564                 num_hrrq++;
5565                 if (budget > 0 && num_hrrq >= budget)
5566                         break;
5567         }
5568 
5569         return num_hrrq;
5570 }
5571 
5572 static int ipr_iopoll(struct blk_iopoll *iop, int budget)
5573 {
5574         struct ipr_ioa_cfg *ioa_cfg;
5575         struct ipr_hrr_queue *hrrq;
5576         struct ipr_cmnd *ipr_cmd, *temp;
5577         unsigned long hrrq_flags;
5578         int completed_ops;
5579         LIST_HEAD(doneq);
5580 
5581         hrrq = container_of(iop, struct ipr_hrr_queue, iopoll);
5582         ioa_cfg = hrrq->ioa_cfg;
5583 
5584         spin_lock_irqsave(hrrq->lock, hrrq_flags);
5585         completed_ops = ipr_process_hrrq(hrrq, budget, &doneq);
5586 
5587         if (completed_ops < budget)
5588                 blk_iopoll_complete(iop);
5589         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5590 
5591         list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5592                 list_del(&ipr_cmd->queue);
5593                 del_timer(&ipr_cmd->timer);
5594                 ipr_cmd->fast_done(ipr_cmd);
5595         }
5596 
5597         return completed_ops;
5598 }
5599 
5600 /**
5601  * ipr_isr - Interrupt service routine
5602  * @irq:        irq number
5603  * @devp:       pointer to ioa config struct
5604  *
5605  * Return value:
5606  *      IRQ_NONE / IRQ_HANDLED
5607  **/
5608 static irqreturn_t ipr_isr(int irq, void *devp)
5609 {
5610         struct ipr_hrr_queue *hrrq = (struct ipr_hrr_queue *)devp;
5611         struct ipr_ioa_cfg *ioa_cfg = hrrq->ioa_cfg;
5612         unsigned long hrrq_flags = 0;
5613         u32 int_reg = 0;
5614         int num_hrrq = 0;
5615         int irq_none = 0;
5616         struct ipr_cmnd *ipr_cmd, *temp;
5617         irqreturn_t rc = IRQ_NONE;
5618         LIST_HEAD(doneq);
5619 
5620         spin_lock_irqsave(hrrq->lock, hrrq_flags);
5621         /* If interrupts are disabled, ignore the interrupt */
5622         if (!hrrq->allow_interrupts) {
5623                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5624                 return IRQ_NONE;
5625         }
5626 
5627         while (1) {
5628                 if (ipr_process_hrrq(hrrq, -1, &doneq)) {
5629                         rc =  IRQ_HANDLED;
5630 
5631                         if (!ioa_cfg->clear_isr)
5632                                 break;
5633 
5634                         /* Clear the PCI interrupt */
5635                         num_hrrq = 0;
5636                         do {
5637                                 writel(IPR_PCII_HRRQ_UPDATED,
5638                                      ioa_cfg->regs.clr_interrupt_reg32);
5639                                 int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5640                         } while (int_reg & IPR_PCII_HRRQ_UPDATED &&
5641                                 num_hrrq++ < IPR_MAX_HRRQ_RETRIES);
5642 
5643                 } else if (rc == IRQ_NONE && irq_none == 0) {
5644                         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5645                         irq_none++;
5646                 } else if (num_hrrq == IPR_MAX_HRRQ_RETRIES &&
5647                            int_reg & IPR_PCII_HRRQ_UPDATED) {
5648                         ipr_isr_eh(ioa_cfg,
5649                                 "Error clearing HRRQ: ", num_hrrq);
5650                         rc = IRQ_HANDLED;
5651                         break;
5652                 } else
5653                         break;
5654         }
5655 
5656         if (unlikely(rc == IRQ_NONE))
5657                 rc = ipr_handle_other_interrupt(ioa_cfg, int_reg);
5658 
5659         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5660         list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5661                 list_del(&ipr_cmd->queue);
5662                 del_timer(&ipr_cmd->timer);
5663                 ipr_cmd->fast_done(ipr_cmd);
5664         }
5665         return rc;
5666 }
5667 
5668 /**
5669  * ipr_isr_mhrrq - Interrupt service routine
5670  * @irq:        irq number
5671  * @devp:       pointer to ioa config struct
5672  *
5673  * Return value:
5674  *      IRQ_NONE / IRQ_HANDLED
5675  **/
5676 static irqreturn_t ipr_isr_mhrrq(int irq, void *devp)
5677 {
5678         struct ipr_hrr_queue *hrrq = (struct ipr_hrr_queue *)devp;
5679         struct ipr_ioa_cfg *ioa_cfg = hrrq->ioa_cfg;
5680         unsigned long hrrq_flags = 0;
5681         struct ipr_cmnd *ipr_cmd, *temp;
5682         irqreturn_t rc = IRQ_NONE;
5683         LIST_HEAD(doneq);
5684 
5685         spin_lock_irqsave(hrrq->lock, hrrq_flags);
5686 
5687         /* If interrupts are disabled, ignore the interrupt */
5688         if (!hrrq->allow_interrupts) {
5689                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5690                 return IRQ_NONE;
5691         }
5692 
5693         if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
5694                 if ((be32_to_cpu(*hrrq->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5695                        hrrq->toggle_bit) {
5696                         if (!blk_iopoll_sched_prep(&hrrq->iopoll))
5697                                 blk_iopoll_sched(&hrrq->iopoll);
5698                         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5699                         return IRQ_HANDLED;
5700                 }
5701         } else {
5702                 if ((be32_to_cpu(*hrrq->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5703                         hrrq->toggle_bit)
5704 
5705                         if (ipr_process_hrrq(hrrq, -1, &doneq))
5706                                 rc =  IRQ_HANDLED;
5707         }
5708 
5709         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5710 
5711         list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5712                 list_del(&ipr_cmd->queue);
5713                 del_timer(&ipr_cmd->timer);
5714                 ipr_cmd->fast_done(ipr_cmd);
5715         }
5716         return rc;
5717 }
5718 
5719 /**
5720  * ipr_build_ioadl64 - Build a scatter/gather list and map the buffer
5721  * @ioa_cfg:    ioa config struct
5722  * @ipr_cmd:    ipr command struct
5723  *
5724  * Return value:
5725  *      0 on success / -1 on failure
5726  **/
5727 static int ipr_build_ioadl64(struct ipr_ioa_cfg *ioa_cfg,
5728                              struct ipr_cmnd *ipr_cmd)
5729 {
5730         int i, nseg;
5731         struct scatterlist *sg;
5732         u32 length;
5733         u32 ioadl_flags = 0;
5734         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5735         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5736         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
5737 
5738         length = scsi_bufflen(scsi_cmd);
5739         if (!length)
5740                 return 0;
5741 
5742         nseg = scsi_dma_map(scsi_cmd);
5743         if (nseg < 0) {
5744                 if (printk_ratelimit())
5745                         dev_err(&ioa_cfg->pdev->dev, "scsi_dma_map failed!\n");
5746                 return -1;
5747         }
5748 
5749         ipr_cmd->dma_use_sg = nseg;
5750 
5751         ioarcb->data_transfer_length = cpu_to_be32(length);
5752         ioarcb->ioadl_len =
5753                 cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
5754 
5755         if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) {
5756                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
5757                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
5758         } else if (scsi_cmd->sc_data_direction == DMA_FROM_DEVICE)
5759                 ioadl_flags = IPR_IOADL_FLAGS_READ;
5760 
5761         scsi_for_each_sg(scsi_cmd, sg, ipr_cmd->dma_use_sg, i) {
5762                 ioadl64[i].flags = cpu_to_be32(ioadl_flags);
5763                 ioadl64[i].data_len = cpu_to_be32(sg_dma_len(sg));
5764                 ioadl64[i].address = cpu_to_be64(sg_dma_address(sg));
5765         }
5766 
5767         ioadl64[i-1].flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
5768         return 0;
5769 }
5770 
5771 /**
5772  * ipr_build_ioadl - Build a scatter/gather list and map the buffer
5773  * @ioa_cfg:    ioa config struct
5774  * @ipr_cmd:    ipr command struct
5775  *
5776  * Return value:
5777  *      0 on success / -1 on failure
5778  **/
5779 static int ipr_build_ioadl(struct ipr_ioa_cfg *ioa_cfg,
5780                            struct ipr_cmnd *ipr_cmd)
5781 {
5782         int i, nseg;
5783         struct scatterlist *sg;
5784         u32 length;
5785         u32 ioadl_flags = 0;
5786         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5787         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5788         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
5789 
5790         length = scsi_bufflen(scsi_cmd);
5791         if (!length)
5792                 return 0;
5793 
5794         nseg = scsi_dma_map(scsi_cmd);
5795         if (nseg < 0) {
5796                 dev_err(&ioa_cfg->pdev->dev, "scsi_dma_map failed!\n");
5797                 return -1;
5798         }
5799 
5800         ipr_cmd->dma_use_sg = nseg;
5801 
5802         if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) {
5803                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
5804                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
5805                 ioarcb->data_transfer_length = cpu_to_be32(length);
5806                 ioarcb->ioadl_len =
5807                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
5808         } else if (scsi_cmd->sc_data_direction == DMA_FROM_DEVICE) {
5809                 ioadl_flags = IPR_IOADL_FLAGS_READ;
5810                 ioarcb->read_data_transfer_length = cpu_to_be32(length);
5811                 ioarcb->read_ioadl_len =
5812                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
5813         }
5814 
5815         if (ipr_cmd->dma_use_sg <= ARRAY_SIZE(ioarcb->u.add_data.u.ioadl)) {
5816                 ioadl = ioarcb->u.add_data.u.ioadl;
5817                 ioarcb->write_ioadl_addr = cpu_to_be32((ipr_cmd->dma_addr) +
5818                                     offsetof(struct ipr_ioarcb, u.add_data));
5819                 ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
5820         }
5821 
5822         scsi_for_each_sg(scsi_cmd, sg, ipr_cmd->dma_use_sg, i) {
5823                 ioadl[i].flags_and_data_len =
5824                         cpu_to_be32(ioadl_flags | sg_dma_len(sg));
5825                 ioadl[i].address = cpu_to_be32(sg_dma_address(sg));
5826         }
5827 
5828         ioadl[i-1].flags_and_data_len |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
5829         return 0;
5830 }
5831 
5832 /**
5833  * ipr_erp_done - Process completion of ERP for a device
5834  * @ipr_cmd:            ipr command struct
5835  *
5836  * This function copies the sense buffer into the scsi_cmd
5837  * struct and pushes the scsi_done function.
5838  *
5839  * Return value:
5840  *      nothing
5841  **/
5842 static void ipr_erp_done(struct ipr_cmnd *ipr_cmd)
5843 {
5844         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5845         struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
5846         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5847 
5848         if (IPR_IOASC_SENSE_KEY(ioasc) > 0) {
5849                 scsi_cmd->result |= (DID_ERROR << 16);
5850                 scmd_printk(KERN_ERR, scsi_cmd,
5851                             "Request Sense failed with IOASC: 0x%08X\n", ioasc);
5852         } else {
5853                 memcpy(scsi_cmd->sense_buffer, ipr_cmd->sense_buffer,
5854                        SCSI_SENSE_BUFFERSIZE);
5855         }
5856 
5857         if (res) {
5858                 if (!ipr_is_naca_model(res))
5859                         res->needs_sync_complete = 1;
5860                 res->in_erp = 0;
5861         }
5862         scsi_dma_unmap(ipr_cmd->scsi_cmd);
5863         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5864         scsi_cmd->scsi_done(scsi_cmd);
5865 }
5866 
5867 /**
5868  * ipr_reinit_ipr_cmnd_for_erp - Re-initialize a cmnd block to be used for ERP
5869  * @ipr_cmd:    ipr command struct
5870  *
5871  * Return value:
5872  *      none
5873  **/
5874 static void ipr_reinit_ipr_cmnd_for_erp(struct ipr_cmnd *ipr_cmd)
5875 {
5876         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5877         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
5878         dma_addr_t dma_addr = ipr_cmd->dma_addr;
5879 
5880         memset(&ioarcb->cmd_pkt, 0, sizeof(struct ipr_cmd_pkt));
5881         ioarcb->data_transfer_length = 0;
5882         ioarcb->read_data_transfer_length = 0;
5883         ioarcb->ioadl_len = 0;
5884         ioarcb->read_ioadl_len = 0;
5885         ioasa->hdr.ioasc = 0;
5886         ioasa->hdr.residual_data_len = 0;
5887 
5888         if (ipr_cmd->ioa_cfg->sis64)
5889                 ioarcb->u.sis64_addr_data.data_ioadl_addr =
5890                         cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ioadl64));
5891         else {
5892                 ioarcb->write_ioadl_addr =
5893                         cpu_to_be32(dma_addr + offsetof(struct ipr_cmnd, i.ioadl));
5894                 ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
5895         }
5896 }
5897 
5898 /**
5899  * ipr_erp_request_sense - Send request sense to a device
5900  * @ipr_cmd:    ipr command struct
5901  *
5902  * This function sends a request sense to a device as a result
5903  * of a check condition.
5904  *
5905  * Return value:
5906  *      nothing
5907  **/
5908 static void ipr_erp_request_sense(struct ipr_cmnd *ipr_cmd)
5909 {
5910         struct ipr_cmd_pkt *cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5911         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5912 
5913         if (IPR_IOASC_SENSE_KEY(ioasc) > 0) {
5914                 ipr_erp_done(ipr_cmd);
5915                 return;
5916         }
5917 
5918         ipr_reinit_ipr_cmnd_for_erp(ipr_cmd);
5919 
5920         cmd_pkt->request_type = IPR_RQTYPE_SCSICDB;
5921         cmd_pkt->cdb[0] = REQUEST_SENSE;
5922         cmd_pkt->cdb[4] = SCSI_SENSE_BUFFERSIZE;
5923         cmd_pkt->flags_hi |= IPR_FLAGS_HI_SYNC_OVERRIDE;
5924         cmd_pkt->flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
5925         cmd_pkt->timeout = cpu_to_be16(IPR_REQUEST_SENSE_TIMEOUT / HZ);
5926 
5927         ipr_init_ioadl(ipr_cmd, ipr_cmd->sense_buffer_dma,
5928                        SCSI_SENSE_BUFFERSIZE, IPR_IOADL_FLAGS_READ_LAST);
5929 
5930         ipr_do_req(ipr_cmd, ipr_erp_done, ipr_timeout,
5931                    IPR_REQUEST_SENSE_TIMEOUT * 2);
5932 }
5933 
5934 /**
5935  * ipr_erp_cancel_all - Send cancel all to a device
5936  * @ipr_cmd:    ipr command struct
5937  *
5938  * This function sends a cancel all to a device to clear the
5939  * queue. If we are running TCQ on the device, QERR is set to 1,
5940  * which means all outstanding ops have been dropped on the floor.
5941  * Cancel all will return them to us.
5942  *
5943  * Return value:
5944  *      nothing
5945  **/
5946 static void ipr_erp_cancel_all(struct ipr_cmnd *ipr_cmd)
5947 {
5948         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5949         struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
5950         struct ipr_cmd_pkt *cmd_pkt;
5951 
5952         res->in_erp = 1;
5953 
5954         ipr_reinit_ipr_cmnd_for_erp(ipr_cmd);
5955 
5956         if (!scsi_cmd->device->simple_tags) {
5957                 ipr_erp_request_sense(ipr_cmd);
5958                 return;
5959         }
5960 
5961         cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5962         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5963         cmd_pkt->cdb[0] = IPR_CANCEL_ALL_REQUESTS;
5964 
5965         ipr_do_req(ipr_cmd, ipr_erp_request_sense, ipr_timeout,
5966                    IPR_CANCEL_ALL_TIMEOUT);
5967 }
5968 
5969 /**
5970  * ipr_dump_ioasa - Dump contents of IOASA
5971  * @ioa_cfg:    ioa config struct
5972  * @ipr_cmd:    ipr command struct
5973  * @res:                resource entry struct
5974  *
5975  * This function is invoked by the interrupt handler when ops
5976  * fail. It will log the IOASA if appropriate. Only called
5977  * for GPDD ops.
5978  *
5979  * Return value:
5980  *      none
5981  **/
5982 static void ipr_dump_ioasa(struct ipr_ioa_cfg *ioa_cfg,
5983                            struct ipr_cmnd *ipr_cmd, struct ipr_resource_entry *res)
5984 {
5985         int i;
5986         u16 data_len;
5987         u32 ioasc, fd_ioasc;
5988         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
5989         __be32 *ioasa_data = (__be32 *)ioasa;
5990         int error_index;
5991 
5992         ioasc = be32_to_cpu(ioasa->hdr.ioasc) & IPR_IOASC_IOASC_MASK;
5993         fd_ioasc = be32_to_cpu(ioasa->hdr.fd_ioasc) & IPR_IOASC_IOASC_MASK;
5994 
5995         if (0 == ioasc)
5996                 return;
5997 
5998         if (ioa_cfg->log_level < IPR_DEFAULT_LOG_LEVEL)
5999                 return;
6000 
6001         if (ioasc == IPR_IOASC_BUS_WAS_RESET && fd_ioasc)
6002                 error_index = ipr_get_error(fd_ioasc);
6003         else
6004                 error_index = ipr_get_error(ioasc);
6005 
6006         if (ioa_cfg->log_level < IPR_MAX_LOG_LEVEL) {
6007                 /* Don't log an error if the IOA already logged one */
6008                 if (ioasa->hdr.ilid != 0)
6009                         return;
6010 
6011                 if (!ipr_is_gscsi(res))
6012                         return;
6013 
6014                 if (ipr_error_table[error_index].log_ioasa == 0)
6015                         return;
6016         }
6017 
6018         ipr_res_err(ioa_cfg, res, "%s\n", ipr_error_table[error_index].error);
6019 
6020         data_len = be16_to_cpu(ioasa->hdr.ret_stat_len);
6021         if (ioa_cfg->sis64 && sizeof(struct ipr_ioasa64) < data_len)
6022                 data_len = sizeof(struct ipr_ioasa64);
6023         else if (!ioa_cfg->sis64 && sizeof(struct ipr_ioasa) < data_len)
6024                 data_len = sizeof(struct ipr_ioasa);
6025 
6026         ipr_err("IOASA Dump:\n");
6027 
6028         for (i = 0; i < data_len / 4; i += 4) {
6029                 ipr_err("%08X: %08X %08X %08X %08X\n", i*4,
6030                         be32_to_cpu(ioasa_data[i]),
6031                         be32_to_cpu(ioasa_data[i+1]),
6032                         be32_to_cpu(ioasa_data[i+2]),
6033                         be32_to_cpu(ioasa_data[i+3]));
6034         }
6035 }
6036 
6037 /**
6038  * ipr_gen_sense - Generate SCSI sense data from an IOASA
6039  * @ioasa:              IOASA
6040  * @sense_buf:  sense data buffer
6041  *
6042  * Return value:
6043  *      none
6044  **/
6045 static void ipr_gen_sense(struct ipr_cmnd *ipr_cmd)
6046 {
6047         u32 failing_lba;
6048         u8 *sense_buf = ipr_cmd->scsi_cmd->sense_buffer;
6049         struct ipr_resource_entry *res = ipr_cmd->scsi_cmd->device->hostdata;
6050         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
6051         u32 ioasc = be32_to_cpu(ioasa->hdr.ioasc);
6052 
6053         memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
6054 
6055         if (ioasc >= IPR_FIRST_DRIVER_IOASC)
6056                 return;
6057 
6058         ipr_cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
6059 
6060         if (ipr_is_vset_device(res) &&
6061             ioasc == IPR_IOASC_MED_DO_NOT_REALLOC &&
6062             ioasa->u.vset.failing_lba_hi != 0) {
6063                 sense_buf[0] = 0x72;
6064                 sense_buf[1] = IPR_IOASC_SENSE_KEY(ioasc);
6065                 sense_buf[2] = IPR_IOASC_SENSE_CODE(ioasc);
6066                 sense_buf[3] = IPR_IOASC_SENSE_QUAL(ioasc);
6067 
6068                 sense_buf[7] = 12;
6069                 sense_buf[8] = 0;
6070                 sense_buf[9] = 0x0A;
6071                 sense_buf[10] = 0x80;
6072 
6073                 failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_hi);
6074 
6075                 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
6076                 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
6077                 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
6078                 sense_buf[15] = failing_lba & 0x000000ff;
6079 
6080                 failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_lo);
6081 
6082                 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
6083                 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
6084                 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
6085                 sense_buf[19] = failing_lba & 0x000000ff;
6086         } else {
6087                 sense_buf[0] = 0x70;
6088                 sense_buf[2] = IPR_IOASC_SENSE_KEY(ioasc);
6089                 sense_buf[12] = IPR_IOASC_SENSE_CODE(ioasc);
6090                 sense_buf[13] = IPR_IOASC_SENSE_QUAL(ioasc);
6091 
6092                 /* Illegal request */
6093                 if ((IPR_IOASC_SENSE_KEY(ioasc) == 0x05) &&
6094                     (be32_to_cpu(ioasa->hdr.ioasc_specific) & IPR_FIELD_POINTER_VALID)) {
6095                         sense_buf[7] = 10;      /* additional length */
6096 
6097                         /* IOARCB was in error */
6098                         if (IPR_IOASC_SENSE_CODE(ioasc) == 0x24)
6099                                 sense_buf[15] = 0xC0;
6100                         else    /* Parameter data was invalid */
6101                                 sense_buf[15] = 0x80;
6102 
6103                         sense_buf[16] =
6104                             ((IPR_FIELD_POINTER_MASK &
6105                               be32_to_cpu(ioasa->hdr.ioasc_specific)) >> 8) & 0xff;
6106                         sense_buf[17] =
6107                             (IPR_FIELD_POINTER_MASK &
6108                              be32_to_cpu(ioasa->hdr.ioasc_specific)) & 0xff;
6109                 } else {
6110                         if (ioasc == IPR_IOASC_MED_DO_NOT_REALLOC) {
6111                                 if (ipr_is_vset_device(res))
6112                                         failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_lo);
6113                                 else
6114                                         failing_lba = be32_to_cpu(ioasa->u.dasd.failing_lba);
6115 
6116                                 sense_buf[0] |= 0x80;   /* Or in the Valid bit */
6117                                 sense_buf[3] = (failing_lba & 0xff000000) >> 24;
6118                                 sense_buf[4] = (failing_lba & 0x00ff0000) >> 16;
6119                                 sense_buf[5] = (failing_lba & 0x0000ff00) >> 8;
6120                                 sense_buf[6] = failing_lba & 0x000000ff;
6121                         }
6122 
6123                         sense_buf[7] = 6;       /* additional length */
6124                 }
6125         }
6126 }
6127 
6128 /**
6129  * ipr_get_autosense - Copy autosense data to sense buffer
6130  * @ipr_cmd:    ipr command struct
6131  *
6132  * This function copies the autosense buffer to the buffer
6133  * in the scsi_cmd, if there is autosense available.
6134  *
6135  * Return value:
6136  *      1 if autosense was available / 0 if not
6137  **/
6138 static int ipr_get_autosense(struct ipr_cmnd *ipr_cmd)
6139 {
6140         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
6141         struct ipr_ioasa64 *ioasa64 = &ipr_cmd->s.ioasa64;
6142 
6143         if ((be32_to_cpu(ioasa->hdr.ioasc_specific) & IPR_AUTOSENSE_VALID) == 0)
6144                 return 0;
6145 
6146         if (ipr_cmd->ioa_cfg->sis64)
6147                 memcpy(ipr_cmd->scsi_cmd->sense_buffer, ioasa64->auto_sense.data,
6148                        min_t(u16, be16_to_cpu(ioasa64->auto_sense.auto_sense_len),
6149                            SCSI_SENSE_BUFFERSIZE));
6150         else
6151                 memcpy(ipr_cmd->scsi_cmd->sense_buffer, ioasa->auto_sense.data,
6152                        min_t(u16, be16_to_cpu(ioasa->auto_sense.auto_sense_len),
6153                            SCSI_SENSE_BUFFERSIZE));
6154         return 1;
6155 }
6156 
6157 /**
6158  * ipr_erp_start - Process an error response for a SCSI op
6159  * @ioa_cfg:    ioa config struct
6160  * @ipr_cmd:    ipr command struct
6161  *
6162  * This function determines whether or not to initiate ERP
6163  * on the affected device.
6164  *
6165  * Return value:
6166  *      nothing
6167  **/
6168 static void ipr_erp_start(struct ipr_ioa_cfg *ioa_cfg,
6169                               struct ipr_cmnd *ipr_cmd)
6170 {
6171         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
6172         struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
6173         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
6174         u32 masked_ioasc = ioasc & IPR_IOASC_IOASC_MASK;
6175 
6176         if (!res) {
6177                 ipr_scsi_eh_done(ipr_cmd);
6178                 return;
6179         }
6180 
6181         if (!ipr_is_gscsi(res) && masked_ioasc != IPR_IOASC_HW_DEV_BUS_STATUS)
6182                 ipr_gen_sense(ipr_cmd);
6183 
6184         ipr_dump_ioasa(ioa_cfg, ipr_cmd, res);
6185 
6186         switch (masked_ioasc) {
6187         case IPR_IOASC_ABORTED_CMD_TERM_BY_HOST:
6188                 if (ipr_is_naca_model(res))
6189                         scsi_cmd->result |= (DID_ABORT << 16);
6190                 else
6191                         scsi_cmd->result |= (DID_IMM_RETRY << 16);
6192                 break;
6193         case IPR_IOASC_IR_RESOURCE_HANDLE:
6194         case IPR_IOASC_IR_NO_CMDS_TO_2ND_IOA:
6195                 scsi_cmd->result |= (DID_NO_CONNECT << 16);
6196                 break;
6197         case IPR_IOASC_HW_SEL_TIMEOUT:
6198                 scsi_cmd->result |= (DID_NO_CONNECT << 16);
6199                 if (!ipr_is_naca_model(res))
6200                         res->needs_sync_complete = 1;
6201                 break;
6202         case IPR_IOASC_SYNC_REQUIRED:
6203                 if (!res->in_erp)
6204                         res->needs_sync_complete = 1;
6205                 scsi_cmd->result |= (DID_IMM_RETRY << 16);
6206                 break;
6207         case IPR_IOASC_MED_DO_NOT_REALLOC: /* prevent retries */
6208         case IPR_IOASA_IR_DUAL_IOA_DISABLED:
6209                 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
6210                 break;
6211         case IPR_IOASC_BUS_WAS_RESET:
6212         case IPR_IOASC_BUS_WAS_RESET_BY_OTHER:
6213                 /*
6214                  * Report the bus reset and ask for a retry. The device
6215                  * will give CC/UA the next command.
6216                  */
6217                 if (!res->resetting_device)
6218                         scsi_report_bus_reset(ioa_cfg->host, scsi_cmd->device->channel);
6219                 scsi_cmd->result |= (DID_ERROR << 16);
6220                 if (!ipr_is_naca_model(res))
6221                         res->needs_sync_complete = 1;
6222                 break;
6223         case IPR_IOASC_HW_DEV_BUS_STATUS:
6224                 scsi_cmd->result |= IPR_IOASC_SENSE_STATUS(ioasc);
6225                 if (IPR_IOASC_SENSE_STATUS(ioasc) == SAM_STAT_CHECK_CONDITION) {
6226                         if (!ipr_get_autosense(ipr_cmd)) {
6227                                 if (!ipr_is_naca_model(res)) {
6228                                         ipr_erp_cancel_all(ipr_cmd);
6229                                         return;
6230                                 }
6231                         }
6232                 }
6233                 if (!ipr_is_naca_model(res))
6234                         res->needs_sync_complete = 1;
6235                 break;
6236         case IPR_IOASC_NR_INIT_CMD_REQUIRED:
6237                 break;
6238         case IPR_IOASC_IR_NON_OPTIMIZED:
6239                 if (res->raw_mode) {
6240                         res->raw_mode = 0;
6241                         scsi_cmd->result |= (DID_IMM_RETRY << 16);
6242                 } else
6243                         scsi_cmd->result |= (DID_ERROR << 16);
6244                 break;
6245         default:
6246                 if (IPR_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
6247                         scsi_cmd->result |= (DID_ERROR << 16);
6248                 if (!ipr_is_vset_device(res) && !ipr_is_naca_model(res))
6249                         res->needs_sync_complete = 1;
6250                 break;
6251         }
6252 
6253         scsi_dma_unmap(ipr_cmd->scsi_cmd);
6254         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6255         scsi_cmd->scsi_done(scsi_cmd);
6256 }
6257 
6258 /**
6259  * ipr_scsi_done - mid-layer done function
6260  * @ipr_cmd:    ipr command struct
6261  *
6262  * This function is invoked by the interrupt handler for
6263  * ops generated by the SCSI mid-layer
6264  *
6265  * Return value:
6266  *      none
6267  **/
6268 static void ipr_scsi_done(struct ipr_cmnd *ipr_cmd)
6269 {
6270         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6271         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
6272         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
6273         unsigned long lock_flags;
6274 
6275         scsi_set_resid(scsi_cmd, be32_to_cpu(ipr_cmd->s.ioasa.hdr.residual_data_len));
6276 
6277         if (likely(IPR_IOASC_SENSE_KEY(ioasc) == 0)) {
6278                 scsi_dma_unmap(scsi_cmd);
6279 
6280                 spin_lock_irqsave(ipr_cmd->hrrq->lock, lock_flags);
6281                 list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6282                 scsi_cmd->scsi_done(scsi_cmd);
6283                 spin_unlock_irqrestore(ipr_cmd->hrrq->lock, lock_flags);
6284         } else {
6285                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
6286                 spin_lock(&ipr_cmd->hrrq->_lock);
6287                 ipr_erp_start(ioa_cfg, ipr_cmd);
6288                 spin_unlock(&ipr_cmd->hrrq->_lock);
6289                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
6290         }
6291 }
6292 
6293 /**
6294  * ipr_queuecommand - Queue a mid-layer request
6295  * @shost:              scsi host struct
6296  * @scsi_cmd:   scsi command struct
6297  *
6298  * This function queues a request generated by the mid-layer.
6299  *
6300  * Return value:
6301  *      0 on success
6302  *      SCSI_MLQUEUE_DEVICE_BUSY if device is busy
6303  *      SCSI_MLQUEUE_HOST_BUSY if host is busy
6304  **/
6305 static int ipr_queuecommand(struct Scsi_Host *shost,
6306                             struct scsi_cmnd *scsi_cmd)
6307 {
6308         struct ipr_ioa_cfg *ioa_cfg;
6309         struct ipr_resource_entry *res;
6310         struct ipr_ioarcb *ioarcb;
6311         struct ipr_cmnd *ipr_cmd;
6312         unsigned long hrrq_flags, lock_flags;
6313         int rc;
6314         struct ipr_hrr_queue *hrrq;
6315         int hrrq_id;
6316 
6317         ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
6318 
6319         scsi_cmd->result = (DID_OK << 16);
6320         res = scsi_cmd->device->hostdata;
6321 
6322         if (ipr_is_gata(res) && res->sata_port) {
6323                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
6324                 rc = ata_sas_queuecmd(scsi_cmd, res->sata_port->ap);
6325                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
6326                 return rc;
6327         }
6328 
6329         hrrq_id = ipr_get_hrrq_index(ioa_cfg);
6330         hrrq = &ioa_cfg->hrrq[hrrq_id];
6331 
6332         spin_lock_irqsave(hrrq->lock, hrrq_flags);
6333         /*
6334          * We are currently blocking all devices due to a host reset
6335          * We have told the host to stop giving us new requests, but
6336          * ERP ops don't count. FIXME
6337          */
6338         if (unlikely(!hrrq->allow_cmds && !hrrq->ioa_is_dead && !hrrq->removing_ioa)) {
6339                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6340                 return SCSI_MLQUEUE_HOST_BUSY;
6341         }
6342 
6343         /*
6344          * FIXME - Create scsi_set_host_offline interface
6345          *  and the ioa_is_dead check can be removed
6346          */
6347         if (unlikely(hrrq->ioa_is_dead || hrrq->removing_ioa || !res)) {
6348                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6349                 goto err_nodev;
6350         }
6351 
6352         ipr_cmd = __ipr_get_free_ipr_cmnd(hrrq);
6353         if (ipr_cmd == NULL) {
6354                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6355                 return SCSI_MLQUEUE_HOST_BUSY;
6356         }
6357         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6358 
6359         ipr_init_ipr_cmnd(ipr_cmd, ipr_scsi_done);
6360         ioarcb = &ipr_cmd->ioarcb;
6361 
6362         memcpy(ioarcb->cmd_pkt.cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
6363         ipr_cmd->scsi_cmd = scsi_cmd;
6364         ipr_cmd->done = ipr_scsi_eh_done;
6365 
6366         if (ipr_is_gscsi(res)) {
6367                 if (scsi_cmd->underflow == 0)
6368                         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
6369 
6370                 if (res->reset_occurred) {
6371                         res->reset_occurred = 0;
6372                         ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_DELAY_AFTER_RST;
6373                 }
6374         }
6375 
6376         if (ipr_is_gscsi(res) || ipr_is_vset_device(res)) {
6377                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_LINK_DESC;
6378 
6379                 ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_ALIGNED_BFR;
6380                 if (scsi_cmd->flags & SCMD_TAGGED)
6381                         ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_SIMPLE_TASK;
6382                 else
6383                         ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_UNTAGGED_TASK;
6384         }
6385 
6386         if (scsi_cmd->cmnd[0] >= 0xC0 &&
6387             (!ipr_is_gscsi(res) || scsi_cmd->cmnd[0] == IPR_QUERY_RSRC_STATE)) {
6388                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
6389         }
6390         if (res->raw_mode && ipr_is_af_dasd_device(res)) {
6391                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_PIPE;
6392 
6393                 if (scsi_cmd->underflow == 0)
6394                         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
6395         }
6396 
6397         if (ioa_cfg->sis64)
6398                 rc = ipr_build_ioadl64(ioa_cfg, ipr_cmd);
6399         else
6400                 rc = ipr_build_ioadl(ioa_cfg, ipr_cmd);
6401 
6402         spin_lock_irqsave(hrrq->lock, hrrq_flags);
6403         if (unlikely(rc || (!hrrq->allow_cmds && !hrrq->ioa_is_dead))) {
6404                 list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_free_q);
6405                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6406                 if (!rc)
6407                         scsi_dma_unmap(scsi_cmd);
6408                 return SCSI_MLQUEUE_HOST_BUSY;
6409         }
6410 
6411         if (unlikely(hrrq->ioa_is_dead)) {
6412                 list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_free_q);
6413                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6414                 scsi_dma_unmap(scsi_cmd);
6415                 goto err_nodev;
6416         }
6417 
6418         ioarcb->res_handle = res->res_handle;
6419         if (res->needs_sync_complete) {
6420                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_SYNC_COMPLETE;
6421                 res->needs_sync_complete = 0;
6422         }
6423         list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_pending_q);
6424         ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_GET_RES_PHYS_LOC(res));
6425         ipr_send_command(ipr_cmd);
6426         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6427         return 0;
6428 
6429 err_nodev:
6430         spin_lock_irqsave(hrrq->lock, hrrq_flags);
6431         memset(scsi_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
6432         scsi_cmd->result = (DID_NO_CONNECT << 16);
6433         scsi_cmd->scsi_done(scsi_cmd);
6434         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6435         return 0;
6436 }
6437 
6438 /**
6439  * ipr_ioctl - IOCTL handler
6440  * @sdev:       scsi device struct
6441  * @cmd:        IOCTL cmd
6442  * @arg:        IOCTL arg
6443  *
6444  * Return value:
6445  *      0 on success / other on failure
6446  **/
6447 static int ipr_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
6448 {
6449         struct ipr_resource_entry *res;
6450 
6451         res = (struct ipr_resource_entry *)sdev->hostdata;
6452         if (res && ipr_is_gata(res)) {
6453                 if (cmd == HDIO_GET_IDENTITY)
6454                         return -ENOTTY;
6455                 return ata_sas_scsi_ioctl(res->sata_port->ap, sdev, cmd, arg);
6456         }
6457 
6458         return -EINVAL;
6459 }
6460 
6461 /**
6462  * ipr_info - Get information about the card/driver
6463  * @scsi_host:  scsi host struct
6464  *
6465  * Return value:
6466  *      pointer to buffer with description string
6467  **/
6468 static const char *ipr_ioa_info(struct Scsi_Host *host)
6469 {
6470         static char buffer[512];
6471         struct ipr_ioa_cfg *ioa_cfg;
6472         unsigned long lock_flags = 0;
6473 
6474         ioa_cfg = (struct ipr_ioa_cfg *) host->hostdata;
6475 
6476         spin_lock_irqsave(host->host_lock, lock_flags);
6477         sprintf(buffer, "IBM %X Storage Adapter", ioa_cfg->type);
6478         spin_unlock_irqrestore(host->host_lock, lock_flags);
6479 
6480         return buffer;
6481 }
6482 
6483 static struct scsi_host_template driver_template = {
6484         .module = THIS_MODULE,
6485         .name = "IPR",
6486         .info = ipr_ioa_info,
6487         .ioctl = ipr_ioctl,
6488         .queuecommand = ipr_queuecommand,
6489         .eh_abort_handler = ipr_eh_abort,
6490         .eh_device_reset_handler = ipr_eh_dev_reset,
6491         .eh_host_reset_handler = ipr_eh_host_reset,
6492         .slave_alloc = ipr_slave_alloc,
6493         .slave_configure = ipr_slave_configure,
6494         .slave_destroy = ipr_slave_destroy,
6495         .scan_finished = ipr_scan_finished,
6496         .target_alloc = ipr_target_alloc,
6497         .target_destroy = ipr_target_destroy,
6498         .change_queue_depth = ipr_change_queue_depth,
6499         .bios_param = ipr_biosparam,
6500         .can_queue = IPR_MAX_COMMANDS,
6501         .this_id = -1,
6502         .sg_tablesize = IPR_MAX_SGLIST,
6503         .max_sectors = IPR_IOA_MAX_SECTORS,
6504         .cmd_per_lun = IPR_MAX_CMD_PER_LUN,
6505         .use_clustering = ENABLE_CLUSTERING,
6506         .shost_attrs = ipr_ioa_attrs,
6507         .sdev_attrs = ipr_dev_attrs,
6508         .proc_name = IPR_NAME,
6509 };
6510 
6511 /**
6512  * ipr_ata_phy_reset - libata phy_reset handler
6513  * @ap:         ata port to reset
6514  *
6515  **/
6516 static void ipr_ata_phy_reset(struct ata_port *ap)
6517 {
6518         unsigned long flags;
6519         struct ipr_sata_port *sata_port = ap->private_data;
6520         struct ipr_resource_entry *res = sata_port->res;
6521         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6522         int rc;
6523 
6524         ENTER;
6525         spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6526         while (ioa_cfg->in_reset_reload) {
6527                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6528                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
6529                 spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6530         }
6531 
6532         if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds)
6533                 goto out_unlock;
6534 
6535         rc = ipr_device_reset(ioa_cfg, res);
6536 
6537         if (rc) {
6538                 ap->link.device[0].class = ATA_DEV_NONE;
6539                 goto out_unlock;
6540         }
6541 
6542         ap->link.device[0].class = res->ata_class;
6543         if (ap->link.device[0].class == ATA_DEV_UNKNOWN)
6544                 ap->link.device[0].class = ATA_DEV_NONE;
6545 
6546 out_unlock:
6547         spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6548         LEAVE;
6549 }
6550 
6551 /**
6552  * ipr_ata_post_internal - Cleanup after an internal command
6553  * @qc: ATA queued command
6554  *
6555  * Return value:
6556  *      none
6557  **/
6558 static void ipr_ata_post_internal(struct ata_queued_cmd *qc)
6559 {
6560         struct ipr_sata_port *sata_port = qc->ap->private_data;
6561         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6562         struct ipr_cmnd *ipr_cmd;
6563         struct ipr_hrr_queue *hrrq;
6564         unsigned long flags;
6565 
6566         spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6567         while (ioa_cfg->in_reset_reload) {
6568                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6569                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
6570                 spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6571         }
6572 
6573         for_each_hrrq(hrrq, ioa_cfg) {
6574                 spin_lock(&hrrq->_lock);
6575                 list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
6576                         if (ipr_cmd->qc == qc) {
6577                                 ipr_device_reset(ioa_cfg, sata_port->res);
6578                                 break;
6579                         }
6580                 }
6581                 spin_unlock(&hrrq->_lock);
6582         }
6583         spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6584 }
6585 
6586 /**
6587  * ipr_copy_sata_tf - Copy a SATA taskfile to an IOA data structure
6588  * @regs:       destination
6589  * @tf: source ATA taskfile
6590  *
6591  * Return value:
6592  *      none
6593  **/
6594 static void ipr_copy_sata_tf(struct ipr_ioarcb_ata_regs *regs,
6595                              struct ata_taskfile *tf)
6596 {
6597         regs->feature = tf->feature;
6598         regs->nsect = tf->nsect;
6599         regs->lbal = tf->lbal;
6600         regs->lbam = tf->lbam;
6601         regs->lbah = tf->lbah;
6602         regs->device = tf->device;
6603         regs->command = tf->command;
6604         regs->hob_feature = tf->hob_feature;
6605         regs->hob_nsect = tf->hob_nsect;
6606         regs->hob_lbal = tf->hob_lbal;
6607         regs->hob_lbam = tf->hob_lbam;
6608         regs->hob_lbah = tf->hob_lbah;
6609         regs->ctl = tf->ctl;
6610 }
6611 
6612 /**
6613  * ipr_sata_done - done function for SATA commands
6614  * @ipr_cmd:    ipr command struct
6615  *
6616  * This function is invoked by the interrupt handler for
6617  * ops generated by the SCSI mid-layer to SATA devices
6618  *
6619  * Return value:
6620  *      none
6621  **/
6622 static void ipr_sata_done(struct ipr_cmnd *ipr_cmd)
6623 {
6624         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6625         struct ata_queued_cmd *qc = ipr_cmd->qc;
6626         struct ipr_sata_port *sata_port = qc->ap->private_data;
6627         struct ipr_resource_entry *res = sata_port->res;
6628         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
6629 
6630         spin_lock(&ipr_cmd->hrrq->_lock);
6631         if (ipr_cmd->ioa_cfg->sis64)
6632                 memcpy(&sata_port->ioasa, &ipr_cmd->s.ioasa64.u.gata,
6633                        sizeof(struct ipr_ioasa_gata));
6634         else
6635                 memcpy(&sata_port->ioasa, &ipr_cmd->s.ioasa.u.gata,
6636                        sizeof(struct ipr_ioasa_gata));
6637         ipr_dump_ioasa(ioa_cfg, ipr_cmd, res);
6638 
6639         if (be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc_specific) & IPR_ATA_DEVICE_WAS_RESET)
6640                 scsi_report_device_reset(ioa_cfg->host, res->bus, res->target);
6641 
6642         if (IPR_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
6643                 qc->err_mask |= __ac_err_mask(sata_port->ioasa.status);
6644         else
6645                 qc->err_mask |= ac_err_mask(sata_port->ioasa.status);
6646         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6647         spin_unlock(&ipr_cmd->hrrq->_lock);
6648         ata_qc_complete(qc);
6649 }
6650 
6651 /**
6652  * ipr_build_ata_ioadl64 - Build an ATA scatter/gather list
6653  * @ipr_cmd:    ipr command struct
6654  * @qc:         ATA queued command
6655  *
6656  **/
6657 static void ipr_build_ata_ioadl64(struct ipr_cmnd *ipr_cmd,
6658                                   struct ata_queued_cmd *qc)
6659 {
6660         u32 ioadl_flags = 0;
6661         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
6662         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ata_ioadl.ioadl64;
6663         struct ipr_ioadl64_desc *last_ioadl64 = NULL;
6664         int len = qc->nbytes;
6665         struct scatterlist *sg;
6666         unsigned int si;
6667         dma_addr_t dma_addr = ipr_cmd->dma_addr;
6668 
6669         if (len == 0)
6670                 return;
6671 
6672         if (qc->dma_dir == DMA_TO_DEVICE) {
6673                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
6674                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
6675         } else if (qc->dma_dir == DMA_FROM_DEVICE)
6676                 ioadl_flags = IPR_IOADL_FLAGS_READ;
6677 
6678         ioarcb->data_transfer_length = cpu_to_be32(len);
6679         ioarcb->ioadl_len =
6680                 cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
6681         ioarcb->u.sis64_addr_data.data_ioadl_addr =
6682                 cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ata_ioadl.ioadl64));
6683 
6684         for_each_sg(qc->sg, sg, qc->n_elem, si) {
6685                 ioadl64->flags = cpu_to_be32(ioadl_flags);
6686                 ioadl64->data_len = cpu_to_be32(sg_dma_len(sg));
6687                 ioadl64->address = cpu_to_be64(sg_dma_address(sg));
6688 
6689                 last_ioadl64 = ioadl64;
6690                 ioadl64++;
6691         }
6692 
6693         if (likely(last_ioadl64))
6694                 last_ioadl64->flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
6695 }
6696 
6697 /**
6698  * ipr_build_ata_ioadl - Build an ATA scatter/gather list
6699  * @ipr_cmd:    ipr command struct
6700  * @qc:         ATA queued command
6701  *
6702  **/
6703 static void ipr_build_ata_ioadl(struct ipr_cmnd *ipr_cmd,
6704                                 struct ata_queued_cmd *qc)
6705 {
6706         u32 ioadl_flags = 0;
6707         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
6708         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
6709         struct ipr_ioadl_desc *last_ioadl = NULL;
6710         int len = qc->nbytes;
6711         struct scatterlist *sg;
6712         unsigned int si;
6713 
6714         if (len == 0)
6715                 return;
6716 
6717         if (qc->dma_dir == DMA_TO_DEVICE) {
6718                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
6719                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
6720                 ioarcb->data_transfer_length = cpu_to_be32(len);
6721                 ioarcb->ioadl_len =
6722                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
6723         } else if (qc->dma_dir == DMA_FROM_DEVICE) {
6724                 ioadl_flags = IPR_IOADL_FLAGS_READ;
6725                 ioarcb->read_data_transfer_length = cpu_to_be32(len);
6726                 ioarcb->read_ioadl_len =
6727                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
6728         }
6729 
6730         for_each_sg(qc->sg, sg, qc->n_elem, si) {
6731                 ioadl->flags_and_data_len = cpu_to_be32(ioadl_flags | sg_dma_len(sg));
6732                 ioadl->address = cpu_to_be32(sg_dma_address(sg));
6733 
6734                 last_ioadl = ioadl;
6735                 ioadl++;
6736         }
6737 
6738         if (likely(last_ioadl))
6739                 last_ioadl->flags_and_data_len |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
6740 }
6741 
6742 /**
6743  * ipr_qc_defer - Get a free ipr_cmd
6744  * @qc: queued command
6745  *
6746  * Return value:
6747  *      0 if success
6748  **/
6749 static int ipr_qc_defer(struct ata_queued_cmd *qc)
6750 {
6751         struct ata_port *ap = qc->ap;
6752         struct ipr_sata_port *sata_port = ap->private_data;
6753         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6754         struct ipr_cmnd *ipr_cmd;
6755         struct ipr_hrr_queue *hrrq;
6756         int hrrq_id;
6757 
6758         hrrq_id = ipr_get_hrrq_index(ioa_cfg);
6759         hrrq = &ioa_cfg->hrrq[hrrq_id];
6760 
6761         qc->lldd_task = NULL;
6762         spin_lock(&hrrq->_lock);
6763         if (unlikely(hrrq->ioa_is_dead)) {
6764                 spin_unlock(&hrrq->_lock);
6765                 return 0;
6766         }
6767 
6768         if (unlikely(!hrrq->allow_cmds)) {
6769                 spin_unlock(&hrrq->_lock);
6770                 return ATA_DEFER_LINK;
6771         }
6772 
6773         ipr_cmd = __ipr_get_free_ipr_cmnd(hrrq);
6774         if (ipr_cmd == NULL) {
6775                 spin_unlock(&hrrq->_lock);
6776                 return ATA_DEFER_LINK;
6777         }
6778 
6779         qc->lldd_task = ipr_cmd;
6780         spin_unlock(&hrrq->_lock);
6781         return 0;
6782 }
6783 
6784 /**
6785  * ipr_qc_issue - Issue a SATA qc to a device
6786  * @qc: queued command
6787  *
6788  * Return value:
6789  *      0 if success
6790  **/
6791 static unsigned int ipr_qc_issue(struct ata_queued_cmd *qc)
6792 {
6793         struct ata_port *ap = qc->ap;
6794         struct ipr_sata_port *sata_port = ap->private_data;
6795         struct ipr_resource_entry *res = sata_port->res;
6796         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6797         struct ipr_cmnd *ipr_cmd;
6798         struct ipr_ioarcb *ioarcb;
6799         struct ipr_ioarcb_ata_regs *regs;
6800 
6801         if (qc->lldd_task == NULL)
6802                 ipr_qc_defer(qc);
6803 
6804         ipr_cmd = qc->lldd_task;
6805         if (ipr_cmd == NULL)
6806                 return AC_ERR_SYSTEM;
6807 
6808         qc->lldd_task = NULL;
6809         spin_lock(&ipr_cmd->hrrq->_lock);
6810         if (unlikely(!ipr_cmd->hrrq->allow_cmds ||
6811                         ipr_cmd->hrrq->ioa_is_dead)) {
6812                 list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6813                 spin_unlock(&ipr_cmd->hrrq->_lock);
6814                 return AC_ERR_SYSTEM;
6815         }
6816 
6817         ipr_init_ipr_cmnd(ipr_cmd, ipr_lock_and_done);
6818         ioarcb = &ipr_cmd->ioarcb;
6819 
6820         if (ioa_cfg->sis64) {
6821                 regs = &ipr_cmd->i.ata_ioadl.regs;
6822                 ioarcb->add_cmd_parms_offset = cpu_to_be16(sizeof(*ioarcb));
6823         } else
6824                 regs = &ioarcb->u.add_data.u.regs;
6825 
6826         memset(regs, 0, sizeof(*regs));
6827         ioarcb->add_cmd_parms_len = cpu_to_be16(sizeof(*regs));
6828 
6829         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
6830         ipr_cmd->qc = qc;
6831         ipr_cmd->done = ipr_sata_done;
6832         ipr_cmd->ioarcb.res_handle = res->res_handle;
6833         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_ATA_PASSTHRU;
6834         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_LINK_DESC;
6835         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
6836         ipr_cmd->dma_use_sg = qc->n_elem;
6837 
6838         if (ioa_cfg->sis64)
6839                 ipr_build_ata_ioadl64(ipr_cmd, qc);
6840         else
6841                 ipr_build_ata_ioadl(ipr_cmd, qc);
6842 
6843         regs->flags |= IPR_ATA_FLAG_STATUS_ON_GOOD_COMPLETION;
6844         ipr_copy_sata_tf(regs, &qc->tf);
6845         memcpy(ioarcb->cmd_pkt.cdb, qc->cdb, IPR_MAX_CDB_LEN);
6846         ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_GET_RES_PHYS_LOC(res));
6847 
6848         switch (qc->tf.protocol) {
6849         case ATA_PROT_NODATA:
6850         case ATA_PROT_PIO:
6851                 break;
6852 
6853         case ATA_PROT_DMA:
6854                 regs->flags |= IPR_ATA_FLAG_XFER_TYPE_DMA;
6855                 break;
6856 
6857         case ATAPI_PROT_PIO:
6858         case ATAPI_PROT_NODATA:
6859                 regs->flags |= IPR_ATA_FLAG_PACKET_CMD;
6860                 break;
6861 
6862         case ATAPI_PROT_DMA:
6863                 regs->flags |= IPR_ATA_FLAG_PACKET_CMD;
6864                 regs->flags |= IPR_ATA_FLAG_XFER_TYPE_DMA;
6865                 break;
6866 
6867         default:
6868                 WARN_ON(1);
6869                 spin_unlock(&ipr_cmd->hrrq->_lock);
6870                 return AC_ERR_INVALID;
6871         }
6872 
6873         ipr_send_command(ipr_cmd);
6874         spin_unlock(&ipr_cmd->hrrq->_lock);
6875 
6876         return 0;
6877 }
6878 
6879 /**
6880  * ipr_qc_fill_rtf - Read result TF
6881  * @qc: ATA queued command
6882  *
6883  * Return value:
6884  *      true
6885  **/
6886 static bool ipr_qc_fill_rtf(struct ata_queued_cmd *qc)
6887 {
6888         struct ipr_sata_port *sata_port = qc->ap->private_data;
6889         struct ipr_ioasa_gata *g = &sata_port->ioasa;
6890         struct ata_taskfile *tf = &qc->result_tf;
6891 
6892         tf->feature = g->error;
6893         tf->nsect = g->nsect;
6894         tf->lbal = g->lbal;
6895         tf->lbam = g->lbam;
6896         tf->lbah = g->lbah;
6897         tf->device = g->device;
6898         tf->command = g->status;
6899         tf->hob_nsect = g->hob_nsect;
6900         tf->hob_lbal = g->hob_lbal;
6901         tf->hob_lbam = g->hob_lbam;
6902         tf->hob_lbah = g->hob_lbah;
6903 
6904         return true;
6905 }
6906 
6907 static struct ata_port_operations ipr_sata_ops = {
6908         .phy_reset = ipr_ata_phy_reset,
6909         .hardreset = ipr_sata_reset,
6910         .post_internal_cmd = ipr_ata_post_internal,
6911         .qc_prep = ata_noop_qc_prep,
6912         .qc_defer = ipr_qc_defer,
6913         .qc_issue = ipr_qc_issue,
6914         .qc_fill_rtf = ipr_qc_fill_rtf,
6915         .port_start = ata_sas_port_start,
6916         .port_stop = ata_sas_port_stop
6917 };
6918 
6919 static struct ata_port_info sata_port_info = {
6920         .flags          = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
6921                           ATA_FLAG_SAS_HOST,
6922         .pio_mask       = ATA_PIO4_ONLY,
6923         .mwdma_mask     = ATA_MWDMA2,
6924         .udma_mask      = ATA_UDMA6,
6925         .port_ops       = &ipr_sata_ops
6926 };
6927 
6928 #ifdef CONFIG_PPC_PSERIES
6929 static const u16 ipr_blocked_processors[] = {
6930         PVR_NORTHSTAR,
6931         PVR_PULSAR,
6932         PVR_POWER4,
6933         PVR_ICESTAR,
6934         PVR_SSTAR,
6935         PVR_POWER4p,
6936         PVR_630,
6937         PVR_630p
6938 };
6939 
6940 /**
6941  * ipr_invalid_adapter - Determine if this adapter is supported on this hardware
6942  * @ioa_cfg:    ioa cfg struct
6943  *
6944  * Adapters that use Gemstone revision < 3.1 do not work reliably on
6945  * certain pSeries hardware. This function determines if the given
6946  * adapter is in one of these confgurations or not.
6947  *
6948  * Return value:
6949  *      1 if adapter is not supported / 0 if adapter is supported
6950  **/
6951 static int ipr_invalid_adapter(struct ipr_ioa_cfg *ioa_cfg)
6952 {
6953         int i;
6954 
6955         if ((ioa_cfg->type == 0x5702) && (ioa_cfg->pdev->revision < 4)) {
6956                 for (i = 0; i < ARRAY_SIZE(ipr_blocked_processors); i++) {
6957                         if (pvr_version_is(ipr_blocked_processors[i]))
6958                                 return 1;
6959                 }
6960         }
6961         return 0;
6962 }
6963 #else
6964 #define ipr_invalid_adapter(ioa_cfg) 0
6965 #endif
6966 
6967 /**
6968  * ipr_ioa_bringdown_done - IOA bring down completion.
6969  * @ipr_cmd:    ipr command struct
6970  *
6971  * This function processes the completion of an adapter bring down.
6972  * It wakes any reset sleepers.
6973  *
6974  * Return value:
6975  *      IPR_RC_JOB_RETURN
6976  **/
6977 static int ipr_ioa_bringdown_done(struct ipr_cmnd *ipr_cmd)
6978 {
6979         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6980         int i;
6981 
6982         ENTER;
6983         if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].removing_ioa) {
6984                 ipr_trace;
6985                 spin_unlock_irq(ioa_cfg->host->host_lock);
6986                 scsi_unblock_requests(ioa_cfg->host);
6987                 spin_lock_irq(ioa_cfg->host->host_lock);
6988         }
6989 
6990         ioa_cfg->in_reset_reload = 0;
6991         ioa_cfg->reset_retries = 0;
6992         for (i = 0; i < ioa_cfg->hrrq_num; i++) {
6993                 spin_lock(&ioa_cfg->hrrq[i]._lock);
6994                 ioa_cfg->hrrq[i].ioa_is_dead = 1;
6995                 spin_unlock(&ioa_cfg->hrrq[i]._lock);
6996         }
6997         wmb();
6998 
6999         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
7000         wake_up_all(&ioa_cfg->reset_wait_q);
7001         LEAVE;
7002 
7003         return IPR_RC_JOB_RETURN;
7004 }
7005 
7006 /**
7007  * ipr_ioa_reset_done - IOA reset completion.
7008  * @ipr_cmd:    ipr command struct
7009  *
7010  * This function processes the completion of an adapter reset.
7011  * It schedules any necessary mid-layer add/removes and
7012  * wakes any reset sleepers.
7013  *
7014  * Return value:
7015  *      IPR_RC_JOB_RETURN
7016  **/
7017 static int ipr_ioa_reset_done(struct ipr_cmnd *ipr_cmd)
7018 {
7019         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7020         struct ipr_resource_entry *res;
7021         struct ipr_hostrcb *hostrcb, *temp;
7022         int i = 0, j;
7023 
7024         ENTER;
7025         ioa_cfg->in_reset_reload = 0;
7026         for (j = 0; j < ioa_cfg->hrrq_num; j++) {
7027                 spin_lock(&ioa_cfg->hrrq[j]._lock);
7028                 ioa_cfg->hrrq[j].allow_cmds = 1;
7029                 spin_unlock(&ioa_cfg->hrrq[j]._lock);
7030         }
7031         wmb();
7032         ioa_cfg->reset_cmd = NULL;
7033         ioa_cfg->doorbell |= IPR_RUNTIME_RESET;
7034 
7035         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
7036                 if (res->add_to_ml || res->del_from_ml) {
7037                         ipr_trace;
7038                         break;
7039                 }
7040         }
7041         schedule_work(&ioa_cfg->work_q);
7042 
7043         list_for_each_entry_safe(hostrcb, temp, &ioa_cfg->hostrcb_free_q, queue) {
7044                 list_del(&hostrcb->queue);
7045                 if (i++ < IPR_NUM_LOG_HCAMS)
7046                         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
7047                 else
7048                         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
7049         }
7050 
7051         scsi_report_bus_reset(ioa_cfg->host, IPR_VSET_BUS);
7052         dev_info(&ioa_cfg->pdev->dev, "IOA initialized.\n");
7053 
7054         ioa_cfg->reset_retries = 0;
7055         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
7056         wake_up_all(&ioa_cfg->reset_wait_q);
7057 
7058         spin_unlock(ioa_cfg->host->host_lock);
7059         scsi_unblock_requests(ioa_cfg->host);
7060         spin_lock(ioa_cfg->host->host_lock);
7061 
7062         if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds)
7063                 scsi_block_requests(ioa_cfg->host);
7064 
7065         schedule_work(&ioa_cfg->work_q);
7066         LEAVE;
7067         return IPR_RC_JOB_RETURN;
7068 }
7069 
7070 /**
7071  * ipr_set_sup_dev_dflt - Initialize a Set Supported Device buffer
7072  * @supported_dev:      supported device struct
7073  * @vpids:                      vendor product id struct
7074  *
7075  * Return value:
7076  *      none
7077  **/
7078 static void ipr_set_sup_dev_dflt(struct ipr_supported_device *supported_dev,
7079                                  struct ipr_std_inq_vpids *vpids)
7080 {
7081         memset(supported_dev, 0, sizeof(struct ipr_supported_device));
7082         memcpy(&supported_dev->vpids, vpids, sizeof(struct ipr_std_inq_vpids));
7083         supported_dev->num_records = 1;
7084         supported_dev->data_length =
7085                 cpu_to_be16(sizeof(struct ipr_supported_device));
7086         supported_dev->reserved = 0;
7087 }
7088 
7089 /**
7090  * ipr_set_supported_devs - Send Set Supported Devices for a device
7091  * @ipr_cmd:    ipr command struct
7092  *
7093  * This function sends a Set Supported Devices to the adapter
7094  *
7095  * Return value:
7096  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7097  **/
7098 static int ipr_set_supported_devs(struct ipr_cmnd *ipr_cmd)
7099 {
7100         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7101         struct ipr_supported_device *supp_dev = &ioa_cfg->vpd_cbs->supp_dev;
7102         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7103         struct ipr_resource_entry *res = ipr_cmd->u.res;
7104 
7105         ipr_cmd->job_step = ipr_ioa_reset_done;
7106 
7107         list_for_each_entry_continue(res, &ioa_cfg->used_res_q, queue) {
7108                 if (!ipr_is_scsi_disk(res))
7109                         continue;
7110 
7111                 ipr_cmd->u.res = res;
7112                 ipr_set_sup_dev_dflt(supp_dev, &res->std_inq_data.vpids);
7113 
7114                 ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7115                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
7116                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
7117 
7118                 ioarcb->cmd_pkt.cdb[0] = IPR_SET_SUPPORTED_DEVICES;
7119                 ioarcb->cmd_pkt.cdb[1] = IPR_SET_ALL_SUPPORTED_DEVICES;
7120                 ioarcb->cmd_pkt.cdb[7] = (sizeof(struct ipr_supported_device) >> 8) & 0xff;
7121                 ioarcb->cmd_pkt.cdb[8] = sizeof(struct ipr_supported_device) & 0xff;
7122 
7123                 ipr_init_ioadl(ipr_cmd,
7124                                ioa_cfg->vpd_cbs_dma +
7125                                  offsetof(struct ipr_misc_cbs, supp_dev),
7126                                sizeof(struct ipr_supported_device),
7127                                IPR_IOADL_FLAGS_WRITE_LAST);
7128 
7129                 ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout,
7130                            IPR_SET_SUP_DEVICE_TIMEOUT);
7131 
7132                 if (!ioa_cfg->sis64)
7133                         ipr_cmd->job_step = ipr_set_supported_devs;
7134                 LEAVE;
7135                 return IPR_RC_JOB_RETURN;
7136         }
7137 
7138         LEAVE;
7139         return IPR_RC_JOB_CONTINUE;
7140 }
7141 
7142 /**
7143  * ipr_get_mode_page - Locate specified mode page
7144  * @mode_pages: mode page buffer
7145  * @page_code:  page code to find
7146  * @len:                minimum required length for mode page
7147  *
7148  * Return value:
7149  *      pointer to mode page / NULL on failure
7150  **/
7151 static void *ipr_get_mode_page(struct ipr_mode_pages *mode_pages,
7152                                u32 page_code, u32 len)
7153 {
7154         struct ipr_mode_page_hdr *mode_hdr;
7155         u32 page_length;
7156         u32 length;
7157 
7158         if (!mode_pages || (mode_pages->hdr.length == 0))
7159                 return NULL;
7160 
7161         length = (mode_pages->hdr.length + 1) - 4 - mode_pages->hdr.block_desc_len;
7162         mode_hdr = (struct ipr_mode_page_hdr *)
7163                 (mode_pages->data + mode_pages->hdr.block_desc_len);
7164 
7165         while (length) {
7166                 if (IPR_GET_MODE_PAGE_CODE(mode_hdr) == page_code) {
7167                         if (mode_hdr->page_length >= (len - sizeof(struct ipr_mode_page_hdr)))
7168                                 return mode_hdr;
7169                         break;
7170                 } else {
7171                         page_length = (sizeof(struct ipr_mode_page_hdr) +
7172                                        mode_hdr->page_length);
7173                         length -= page_length;
7174                         mode_hdr = (struct ipr_mode_page_hdr *)
7175                                 ((unsigned long)mode_hdr + page_length);
7176                 }
7177         }
7178         return NULL;
7179 }
7180 
7181 /**
7182  * ipr_check_term_power - Check for term power errors
7183  * @ioa_cfg:    ioa config struct
7184  * @mode_pages: IOAFP mode pages buffer
7185  *
7186  * Check the IOAFP's mode page 28 for term power errors
7187  *
7188  * Return value:
7189  *      nothing
7190  **/
7191 static void ipr_check_term_power(struct ipr_ioa_cfg *ioa_cfg,
7192                                  struct ipr_mode_pages *mode_pages)
7193 {
7194         int i;
7195         int entry_length;
7196         struct ipr_dev_bus_entry *bus;
7197         struct ipr_mode_page28 *mode_page;
7198 
7199         mode_page = ipr_get_mode_page(mode_pages, 0x28,
7200                                       sizeof(struct ipr_mode_page28));
7201 
7202         entry_length = mode_page->entry_length;
7203 
7204         bus = mode_page->bus;
7205 
7206         for (i = 0; i < mode_page->num_entries; i++) {
7207                 if (bus->flags & IPR_SCSI_ATTR_NO_TERM_PWR) {
7208                         dev_err(&ioa_cfg->pdev->dev,
7209                                 "Term power is absent on scsi bus %d\n",
7210                                 bus->res_addr.bus);
7211                 }
7212 
7213                 bus = (struct ipr_dev_bus_entry *)((char *)bus + entry_length);
7214         }
7215 }
7216 
7217 /**
7218  * ipr_scsi_bus_speed_limit - Limit the SCSI speed based on SES table
7219  * @ioa_cfg:    ioa config struct
7220  *
7221  * Looks through the config table checking for SES devices. If
7222  * the SES device is in the SES table indicating a maximum SCSI
7223  * bus speed, the speed is limited for the bus.
7224  *
7225  * Return value:
7226  *      none
7227  **/
7228 static void ipr_scsi_bus_speed_limit(struct ipr_ioa_cfg *ioa_cfg)
7229 {
7230         u32 max_xfer_rate;
7231         int i;
7232 
7233         for (i = 0; i < IPR_MAX_NUM_BUSES; i++) {
7234                 max_xfer_rate = ipr_get_max_scsi_speed(ioa_cfg, i,
7235                                                        ioa_cfg->bus_attr[i].bus_width);
7236 
7237                 if (max_xfer_rate < ioa_cfg->bus_attr[i].max_xfer_rate)
7238                         ioa_cfg->bus_attr[i].max_xfer_rate = max_xfer_rate;
7239         }
7240 }
7241 
7242 /**
7243  * ipr_modify_ioafp_mode_page_28 - Modify IOAFP Mode Page 28
7244  * @ioa_cfg:    ioa config struct
7245  * @mode_pages: mode page 28 buffer
7246  *
7247  * Updates mode page 28 based on driver configuration
7248  *
7249  * Return value:
7250  *      none
7251  **/
7252 static void ipr_modify_ioafp_mode_page_28(struct ipr_ioa_cfg *ioa_cfg,
7253                                           struct ipr_mode_pages *mode_pages)
7254 {
7255         int i, entry_length;
7256         struct ipr_dev_bus_entry *bus;
7257         struct ipr_bus_attributes *bus_attr;
7258         struct ipr_mode_page28 *mode_page;
7259 
7260         mode_page = ipr_get_mode_page(mode_pages, 0x28,
7261                                       sizeof(struct ipr_mode_page28));
7262 
7263         entry_length = mode_page->entry_length;
7264 
7265         /* Loop for each device bus entry */
7266         for (i = 0, bus = mode_page->bus;
7267              i < mode_page->num_entries;
7268              i++, bus = (struct ipr_dev_bus_entry *)((u8 *)bus + entry_length)) {
7269                 if (bus->res_addr.bus > IPR_MAX_NUM_BUSES) {
7270                         dev_err(&ioa_cfg->pdev->dev,
7271                                 "Invalid resource address reported: 0x%08X\n",
7272                                 IPR_GET_PHYS_LOC(bus->res_addr));
7273                         continue;
7274                 }
7275 
7276                 bus_attr = &ioa_cfg->bus_attr[i];
7277                 bus->extended_reset_delay = IPR_EXTENDED_RESET_DELAY;
7278                 bus->bus_width = bus_attr->bus_width;
7279                 bus->max_xfer_rate = cpu_to_be32(bus_attr->max_xfer_rate);
7280                 bus->flags &= ~IPR_SCSI_ATTR_QAS_MASK;
7281                 if (bus_attr->qas_enabled)
7282                         bus->flags |= IPR_SCSI_ATTR_ENABLE_QAS;
7283                 else
7284                         bus->flags |= IPR_SCSI_ATTR_DISABLE_QAS;
7285         }
7286 }
7287 
7288 /**
7289  * ipr_build_mode_select - Build a mode select command
7290  * @ipr_cmd:    ipr command struct
7291  * @res_handle: resource handle to send command to
7292  * @parm:               Byte 2 of Mode Sense command
7293  * @dma_addr:   DMA buffer address
7294  * @xfer_len:   data transfer length
7295  *
7296  * Return value:
7297  *      none
7298  **/
7299 static void ipr_build_mode_select(struct ipr_cmnd *ipr_cmd,
7300                                   __be32 res_handle, u8 parm,
7301                                   dma_addr_t dma_addr, u8 xfer_len)
7302 {
7303         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7304 
7305         ioarcb->res_handle = res_handle;
7306         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7307         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
7308         ioarcb->cmd_pkt.cdb[0] = MODE_SELECT;
7309         ioarcb->cmd_pkt.cdb[1] = parm;
7310         ioarcb->cmd_pkt.cdb[4] = xfer_len;
7311 
7312         ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_WRITE_LAST);
7313 }
7314 
7315 /**
7316  * ipr_ioafp_mode_select_page28 - Issue Mode Select Page 28 to IOA
7317  * @ipr_cmd:    ipr command struct
7318  *
7319  * This function sets up the SCSI bus attributes and sends
7320  * a Mode Select for Page 28 to activate them.
7321  *
7322  * Return value:
7323  *      IPR_RC_JOB_RETURN
7324  **/
7325 static int ipr_ioafp_mode_select_page28(struct ipr_cmnd *ipr_cmd)
7326 {
7327         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7328         struct ipr_mode_pages *mode_pages = &ioa_cfg->vpd_cbs->mode_pages;
7329         int length;
7330 
7331         ENTER;
7332         ipr_scsi_bus_speed_limit(ioa_cfg);
7333         ipr_check_term_power(ioa_cfg, mode_pages);
7334         ipr_modify_ioafp_mode_page_28(ioa_cfg, mode_pages);
7335         length = mode_pages->hdr.length + 1;
7336         mode_pages->hdr.length = 0;
7337 
7338         ipr_build_mode_select(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE), 0x11,
7339                               ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, mode_pages),
7340                               length);
7341 
7342         ipr_cmd->job_step = ipr_set_supported_devs;
7343         ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next,
7344                                     struct ipr_resource_entry, queue);
7345         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7346 
7347         LEAVE;
7348         return IPR_RC_JOB_RETURN;
7349 }
7350 
7351 /**
7352  * ipr_build_mode_sense - Builds a mode sense command
7353  * @ipr_cmd:    ipr command struct
7354  * @res:                resource entry struct
7355  * @parm:               Byte 2 of mode sense command
7356  * @dma_addr:   DMA address of mode sense buffer
7357  * @xfer_len:   Size of DMA buffer
7358  *
7359  * Return value:
7360  *      none
7361  **/
7362 static void ipr_build_mode_sense(struct ipr_cmnd *ipr_cmd,
7363                                  __be32 res_handle,
7364                                  u8 parm, dma_addr_t dma_addr, u8 xfer_len)
7365 {
7366         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7367 
7368         ioarcb->res_handle = res_handle;
7369         ioarcb->cmd_pkt.cdb[0] = MODE_SENSE;
7370         ioarcb->cmd_pkt.cdb[2] = parm;
7371         ioarcb->cmd_pkt.cdb[4] = xfer_len;
7372         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7373 
7374         ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_READ_LAST);
7375 }
7376 
7377 /**
7378  * ipr_reset_cmd_failed - Handle failure of IOA reset command
7379  * @ipr_cmd:    ipr command struct
7380  *
7381  * This function handles the failure of an IOA bringup command.
7382  *
7383  * Return value:
7384  *      IPR_RC_JOB_RETURN
7385  **/
7386 static int ipr_reset_cmd_failed(struct ipr_cmnd *ipr_cmd)
7387 {
7388         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7389         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7390 
7391         dev_err(&ioa_cfg->pdev->dev,
7392                 "0x%02X failed with IOASC: 0x%08X\n",
7393                 ipr_cmd->ioarcb.cmd_pkt.cdb[0], ioasc);
7394 
7395         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
7396         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
7397         return IPR_RC_JOB_RETURN;
7398 }
7399 
7400 /**
7401  * ipr_reset_mode_sense_failed - Handle failure of IOAFP mode sense
7402  * @ipr_cmd:    ipr command struct
7403  *
7404  * This function handles the failure of a Mode Sense to the IOAFP.
7405  * Some adapters do not handle all mode pages.
7406  *
7407  * Return value:
7408  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7409  **/
7410 static int ipr_reset_mode_sense_failed(struct ipr_cmnd *ipr_cmd)
7411 {
7412         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7413         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7414 
7415         if (ioasc == IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT) {
7416                 ipr_cmd->job_step = ipr_set_supported_devs;
7417                 ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next,
7418                                             struct ipr_resource_entry, queue);
7419                 return IPR_RC_JOB_CONTINUE;
7420         }
7421 
7422         return ipr_reset_cmd_failed(ipr_cmd);
7423 }
7424 
7425 /**
7426  * ipr_ioafp_mode_sense_page28 - Issue Mode Sense Page 28 to IOA
7427  * @ipr_cmd:    ipr command struct
7428  *
7429  * This function send a Page 28 mode sense to the IOA to
7430  * retrieve SCSI bus attributes.
7431  *
7432  * Return value:
7433  *      IPR_RC_JOB_RETURN
7434  **/
7435 static int ipr_ioafp_mode_sense_page28(struct ipr_cmnd *ipr_cmd)
7436 {
7437         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7438 
7439         ENTER;
7440         ipr_build_mode_sense(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE),
7441                              0x28, ioa_cfg->vpd_cbs_dma +
7442                              offsetof(struct ipr_misc_cbs, mode_pages),
7443                              sizeof(struct ipr_mode_pages));
7444 
7445         ipr_cmd->job_step = ipr_ioafp_mode_select_page28;
7446         ipr_cmd->job_step_failed = ipr_reset_mode_sense_failed;
7447 
7448         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7449 
7450         LEAVE;
7451         return IPR_RC_JOB_RETURN;
7452 }
7453 
7454 /**
7455  * ipr_ioafp_mode_select_page24 - Issue Mode Select to IOA
7456  * @ipr_cmd:    ipr command struct
7457  *
7458  * This function enables dual IOA RAID support if possible.
7459  *
7460  * Return value:
7461  *      IPR_RC_JOB_RETURN
7462  **/
7463 static int ipr_ioafp_mode_select_page24(struct ipr_cmnd *ipr_cmd)
7464 {
7465         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7466         struct ipr_mode_pages *mode_pages = &ioa_cfg->vpd_cbs->mode_pages;
7467         struct ipr_mode_page24 *mode_page;
7468         int length;
7469 
7470         ENTER;
7471         mode_page = ipr_get_mode_page(mode_pages, 0x24,
7472                                       sizeof(struct ipr_mode_page24));
7473 
7474         if (mode_page)
7475                 mode_page->flags |= IPR_ENABLE_DUAL_IOA_AF;
7476 
7477         length = mode_pages->hdr.length + 1;
7478         mode_pages->hdr.length = 0;
7479 
7480         ipr_build_mode_select(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE), 0x11,
7481                               ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, mode_pages),
7482                               length);
7483 
7484         ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7485         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7486 
7487         LEAVE;
7488         return IPR_RC_JOB_RETURN;
7489 }
7490 
7491 /**
7492  * ipr_reset_mode_sense_page24_failed - Handle failure of IOAFP mode sense
7493  * @ipr_cmd:    ipr command struct
7494  *
7495  * This function handles the failure of a Mode Sense to the IOAFP.
7496  * Some adapters do not handle all mode pages.
7497  *
7498  * Return value:
7499  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7500  **/
7501 static int ipr_reset_mode_sense_page24_failed(struct ipr_cmnd *ipr_cmd)
7502 {
7503         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7504 
7505         if (ioasc == IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT) {
7506                 ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7507                 return IPR_RC_JOB_CONTINUE;
7508         }
7509 
7510         return ipr_reset_cmd_failed(ipr_cmd);
7511 }
7512 
7513 /**
7514  * ipr_ioafp_mode_sense_page24 - Issue Page 24 Mode Sense to IOA
7515  * @ipr_cmd:    ipr command struct
7516  *
7517  * This function send a mode sense to the IOA to retrieve
7518  * the IOA Advanced Function Control mode page.
7519  *
7520  * Return value:
7521  *      IPR_RC_JOB_RETURN
7522  **/
7523 static int ipr_ioafp_mode_sense_page24(struct ipr_cmnd *ipr_cmd)
7524 {
7525         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7526 
7527         ENTER;
7528         ipr_build_mode_sense(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE),
7529                              0x24, ioa_cfg->vpd_cbs_dma +
7530                              offsetof(struct ipr_misc_cbs, mode_pages),
7531                              sizeof(struct ipr_mode_pages));
7532 
7533         ipr_cmd->job_step = ipr_ioafp_mode_select_page24;
7534         ipr_cmd->job_step_failed = ipr_reset_mode_sense_page24_failed;
7535 
7536         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7537 
7538         LEAVE;
7539         return IPR_RC_JOB_RETURN;
7540 }
7541 
7542 /**
7543  * ipr_init_res_table - Initialize the resource table
7544  * @ipr_cmd:    ipr command struct
7545  *
7546  * This function looks through the existing resource table, comparing
7547  * it with the config table. This function will take care of old/new
7548  * devices and schedule adding/removing them from the mid-layer
7549  * as appropriate.
7550  *
7551  * Return value:
7552  *      IPR_RC_JOB_CONTINUE
7553  **/
7554 static int ipr_init_res_table(struct ipr_cmnd *ipr_cmd)
7555 {
7556         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7557         struct ipr_resource_entry *res, *temp;
7558         struct ipr_config_table_entry_wrapper cfgtew;
7559         int entries, found, flag, i;
7560         LIST_HEAD(old_res);
7561 
7562         ENTER;
7563         if (ioa_cfg->sis64)
7564                 flag = ioa_cfg->u.cfg_table64->hdr64.flags;
7565         else
7566                 flag = ioa_cfg->u.cfg_table->hdr.flags;
7567 
7568         if (flag & IPR_UCODE_DOWNLOAD_REQ)
7569                 dev_err(&ioa_cfg->pdev->dev, "Microcode download required\n");
7570 
7571         list_for_each_entry_safe(res, temp, &ioa_cfg->used_res_q, queue)
7572                 list_move_tail(&res->queue, &old_res);
7573 
7574         if (ioa_cfg->sis64)
7575                 entries = be16_to_cpu(ioa_cfg->u.cfg_table64->hdr64.num_entries);
7576         else
7577                 entries = ioa_cfg->u.cfg_table->hdr.num_entries;
7578 
7579         for (i = 0; i < entries; i++) {
7580                 if (ioa_cfg->sis64)
7581                         cfgtew.u.cfgte64 = &ioa_cfg->u.cfg_table64->dev[i];
7582                 else
7583                         cfgtew.u.cfgte = &ioa_cfg->u.cfg_table->dev[i];
7584                 found = 0;
7585 
7586                 list_for_each_entry_safe(res, temp, &old_res, queue) {
7587                         if (ipr_is_same_device(res, &cfgtew)) {
7588                                 list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7589                                 found = 1;
7590                                 break;
7591                         }
7592                 }
7593 
7594                 if (!found) {
7595                         if (list_empty(&ioa_cfg->free_res_q)) {
7596                                 dev_err(&ioa_cfg->pdev->dev, "Too many devices attached\n");
7597                                 break;
7598                         }
7599 
7600                         found = 1;
7601                         res = list_entry(ioa_cfg->free_res_q.next,
7602                                          struct ipr_resource_entry, queue);
7603                         list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7604                         ipr_init_res_entry(res, &cfgtew);
7605                         res->add_to_ml = 1;
7606                 } else if (res->sdev && (ipr_is_vset_device(res) || ipr_is_scsi_disk(res)))
7607                         res->sdev->allow_restart = 1;
7608 
7609                 if (found)
7610                         ipr_update_res_entry(res, &cfgtew);
7611         }
7612 
7613         list_for_each_entry_safe(res, temp, &old_res, queue) {
7614                 if (res->sdev) {
7615                         res->del_from_ml = 1;
7616                         res->res_handle = IPR_INVALID_RES_HANDLE;
7617                         list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7618                 }
7619         }
7620 
7621         list_for_each_entry_safe(res, temp, &old_res, queue) {
7622                 ipr_clear_res_target(res);
7623                 list_move_tail(&res->queue, &ioa_cfg->free_res_q);
7624         }
7625 
7626         if (ioa_cfg->dual_raid && ipr_dual_ioa_raid)
7627                 ipr_cmd->job_step = ipr_ioafp_mode_sense_page24;
7628         else
7629                 ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7630 
7631         LEAVE;
7632         return IPR_RC_JOB_CONTINUE;
7633 }
7634 
7635 /**
7636  * ipr_ioafp_query_ioa_cfg - Send a Query IOA Config to the adapter.
7637  * @ipr_cmd:    ipr command struct
7638  *
7639  * This function sends a Query IOA Configuration command
7640  * to the adapter to retrieve the IOA configuration table.
7641  *
7642  * Return value:
7643  *      IPR_RC_JOB_RETURN
7644  **/
7645 static int ipr_ioafp_query_ioa_cfg(struct ipr_cmnd *ipr_cmd)
7646 {
7647         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7648         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7649         struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
7650         struct ipr_inquiry_cap *cap = &ioa_cfg->vpd_cbs->cap;
7651 
7652         ENTER;
7653         if (cap->cap & IPR_CAP_DUAL_IOA_RAID)
7654                 ioa_cfg->dual_raid = 1;
7655         dev_info(&ioa_cfg->pdev->dev, "Adapter firmware version: %02X%02X%02X%02X\n",
7656                  ucode_vpd->major_release, ucode_vpd->card_type,
7657                  ucode_vpd->minor_release[0], ucode_vpd->minor_release[1]);
7658         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
7659         ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7660 
7661         ioarcb->cmd_pkt.cdb[0] = IPR_QUERY_IOA_CONFIG;
7662         ioarcb->cmd_pkt.cdb[6] = (ioa_cfg->cfg_table_size >> 16) & 0xff;
7663         ioarcb->cmd_pkt.cdb[7] = (ioa_cfg->cfg_table_size >> 8) & 0xff;
7664         ioarcb->cmd_pkt.cdb[8] = ioa_cfg->cfg_table_size & 0xff;
7665 
7666         ipr_init_ioadl(ipr_cmd, ioa_cfg->cfg_table_dma, ioa_cfg->cfg_table_size,
7667                        IPR_IOADL_FLAGS_READ_LAST);
7668 
7669         ipr_cmd->job_step = ipr_init_res_table;
7670 
7671         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7672 
7673         LEAVE;
7674         return IPR_RC_JOB_RETURN;
7675 }
7676 
7677 static int ipr_ioa_service_action_failed(struct ipr_cmnd *ipr_cmd)
7678 {
7679         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7680 
7681         if (ioasc == IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT)
7682                 return IPR_RC_JOB_CONTINUE;
7683 
7684         return ipr_reset_cmd_failed(ipr_cmd);
7685 }
7686 
7687 static void ipr_build_ioa_service_action(struct ipr_cmnd *ipr_cmd,
7688                                          __be32 res_handle, u8 sa_code)
7689 {
7690         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7691 
7692         ioarcb->res_handle = res_handle;
7693         ioarcb->cmd_pkt.cdb[0] = IPR_IOA_SERVICE_ACTION;
7694         ioarcb->cmd_pkt.cdb[1] = sa_code;
7695         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
7696 }
7697 
7698 /**
7699  * ipr_ioafp_set_caching_parameters - Issue Set Cache parameters service
7700  * action
7701  *
7702  * Return value:
7703  *      none
7704  **/
7705 static int ipr_ioafp_set_caching_parameters(struct ipr_cmnd *ipr_cmd)
7706 {
7707         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7708         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7709         struct ipr_inquiry_pageC4 *pageC4 = &ioa_cfg->vpd_cbs->pageC4_data;
7710 
7711         ENTER;
7712 
7713         ipr_cmd->job_step = ipr_ioafp_query_ioa_cfg;
7714 
7715         if (pageC4->cache_cap[0] & IPR_CAP_SYNC_CACHE) {
7716                 ipr_build_ioa_service_action(ipr_cmd,
7717                                              cpu_to_be32(IPR_IOA_RES_HANDLE),
7718                                              IPR_IOA_SA_CHANGE_CACHE_PARAMS);
7719 
7720                 ioarcb->cmd_pkt.cdb[2] = 0x40;
7721 
7722                 ipr_cmd->job_step_failed = ipr_ioa_service_action_failed;
7723                 ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout,
7724                            IPR_SET_SUP_DEVICE_TIMEOUT);
7725 
7726                 LEAVE;
7727                 return IPR_RC_JOB_RETURN;
7728         }
7729 
7730         LEAVE;
7731         return IPR_RC_JOB_CONTINUE;
7732 }
7733 
7734 /**
7735  * ipr_ioafp_inquiry - Send an Inquiry to the adapter.
7736  * @ipr_cmd:    ipr command struct
7737  *
7738  * This utility function sends an inquiry to the adapter.
7739  *
7740  * Return value:
7741  *      none
7742  **/
7743 static void ipr_ioafp_inquiry(struct ipr_cmnd *ipr_cmd, u8 flags, u8 page,
7744                               dma_addr_t dma_addr, u8 xfer_len)
7745 {
7746         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7747 
7748         ENTER;
7749         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7750         ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7751 
7752         ioarcb->cmd_pkt.cdb[0] = INQUIRY;
7753         ioarcb->cmd_pkt.cdb[1] = flags;
7754         ioarcb->cmd_pkt.cdb[2] = page;
7755         ioarcb->cmd_pkt.cdb[4] = xfer_len;
7756 
7757         ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_READ_LAST);
7758 
7759         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7760         LEAVE;
7761 }
7762 
7763 /**
7764  * ipr_inquiry_page_supported - Is the given inquiry page supported
7765  * @page0:              inquiry page 0 buffer
7766  * @page:               page code.
7767  *
7768  * This function determines if the specified inquiry page is supported.
7769  *
7770  * Return value:
7771  *      1 if page is supported / 0 if not
7772  **/
7773 static int ipr_inquiry_page_supported(struct ipr_inquiry_page0 *page0, u8 page)
7774 {
7775         int i;
7776 
7777         for (i = 0; i < min_t(u8, page0->len, IPR_INQUIRY_PAGE0_ENTRIES); i++)
7778                 if (page0->page[i] == page)
7779                         return 1;
7780 
7781         return 0;
7782 }
7783 
7784 /**
7785  * ipr_ioafp_pageC4_inquiry - Send a Page 0xC4 Inquiry to the adapter.
7786  * @ipr_cmd:    ipr command struct
7787  *
7788  * This function sends a Page 0xC4 inquiry to the adapter
7789  * to retrieve software VPD information.
7790  *
7791  * Return value:
7792  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7793  **/
7794 static int ipr_ioafp_pageC4_inquiry(struct ipr_cmnd *ipr_cmd)
7795 {
7796         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7797         struct ipr_inquiry_page0 *page0 = &ioa_cfg->vpd_cbs->page0_data;
7798         struct ipr_inquiry_pageC4 *pageC4 = &ioa_cfg->vpd_cbs->pageC4_data;
7799 
7800         ENTER;
7801         ipr_cmd->job_step = ipr_ioafp_set_caching_parameters;
7802         memset(pageC4, 0, sizeof(*pageC4));
7803 
7804         if (ipr_inquiry_page_supported(page0, 0xC4)) {
7805                 ipr_ioafp_inquiry(ipr_cmd, 1, 0xC4,
7806                                   (ioa_cfg->vpd_cbs_dma
7807                                    + offsetof(struct ipr_misc_cbs,
7808                                               pageC4_data)),
7809                                   sizeof(struct ipr_inquiry_pageC4));
7810                 return IPR_RC_JOB_RETURN;
7811         }
7812 
7813         LEAVE;
7814         return IPR_RC_JOB_CONTINUE;
7815 }
7816 
7817 /**
7818  * ipr_ioafp_cap_inquiry - Send a Page 0xD0 Inquiry to the adapter.
7819  * @ipr_cmd:    ipr command struct
7820  *
7821  * This function sends a Page 0xD0 inquiry to the adapter
7822  * to retrieve adapter capabilities.
7823  *
7824  * Return value:
7825  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7826  **/
7827 static int ipr_ioafp_cap_inquiry(struct ipr_cmnd *ipr_cmd)
7828 {
7829         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7830         struct ipr_inquiry_page0 *page0 = &ioa_cfg->vpd_cbs->page0_data;
7831         struct ipr_inquiry_cap *cap = &ioa_cfg->vpd_cbs->cap;
7832 
7833         ENTER;
7834         ipr_cmd->job_step = ipr_ioafp_pageC4_inquiry;
7835         memset(cap, 0, sizeof(*cap));
7836 
7837         if (ipr_inquiry_page_supported(page0, 0xD0)) {
7838                 ipr_ioafp_inquiry(ipr_cmd, 1, 0xD0,
7839                                   ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, cap),
7840                                   sizeof(struct ipr_inquiry_cap));
7841                 return IPR_RC_JOB_RETURN;
7842         }
7843 
7844         LEAVE;
7845         return IPR_RC_JOB_CONTINUE;
7846 }
7847 
7848 /**
7849  * ipr_ioafp_page3_inquiry - Send a Page 3 Inquiry to the adapter.
7850  * @ipr_cmd:    ipr command struct
7851  *
7852  * This function sends a Page 3 inquiry to the adapter
7853  * to retrieve software VPD information.
7854  *
7855  * Return value:
7856  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7857  **/
7858 static int ipr_ioafp_page3_inquiry(struct ipr_cmnd *ipr_cmd)
7859 {
7860         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7861 
7862         ENTER;
7863 
7864         ipr_cmd->job_step = ipr_ioafp_cap_inquiry;
7865 
7866         ipr_ioafp_inquiry(ipr_cmd, 1, 3,
7867                           ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page3_data),
7868                           sizeof(struct ipr_inquiry_page3));
7869 
7870         LEAVE;
7871         return IPR_RC_JOB_RETURN;
7872 }
7873 
7874 /**
7875  * ipr_ioafp_page0_inquiry - Send a Page 0 Inquiry to the adapter.
7876  * @ipr_cmd:    ipr command struct
7877  *
7878  * This function sends a Page 0 inquiry to the adapter
7879  * to retrieve supported inquiry pages.
7880  *
7881  * Return value:
7882  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7883  **/
7884 static int ipr_ioafp_page0_inquiry(struct ipr_cmnd *ipr_cmd)
7885 {
7886         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7887         char type[5];
7888 
7889         ENTER;
7890 
7891         /* Grab the type out of the VPD and store it away */
7892         memcpy(type, ioa_cfg->vpd_cbs->ioa_vpd.std_inq_data.vpids.product_id, 4);
7893         type[4] = '\0';
7894         ioa_cfg->type = simple_strtoul((char *)type, NULL, 16);
7895 
7896         if (ipr_invalid_adapter(ioa_cfg)) {
7897                 dev_err(&ioa_cfg->pdev->dev,
7898                         "Adapter not supported in this hardware configuration.\n");
7899 
7900                 if (!ipr_testmode) {
7901                         ioa_cfg->reset_retries += IPR_NUM_RESET_RELOAD_RETRIES;
7902                         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
7903                         list_add_tail(&ipr_cmd->queue,
7904                                         &ioa_cfg->hrrq->hrrq_free_q);
7905                         return IPR_RC_JOB_RETURN;
7906                 }
7907         }
7908 
7909         ipr_cmd->job_step = ipr_ioafp_page3_inquiry;
7910 
7911         ipr_ioafp_inquiry(ipr_cmd, 1, 0,
7912                           ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page0_data),
7913                           sizeof(struct ipr_inquiry_page0));
7914 
7915         LEAVE;
7916         return IPR_RC_JOB_RETURN;
7917 }
7918 
7919 /**
7920  * ipr_ioafp_std_inquiry - Send a Standard Inquiry to the adapter.
7921  * @ipr_cmd:    ipr command struct
7922  *