Version:  2.0.40 2.2.26 2.4.37 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 4.5 4.6 4.7 4.8

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 = 16;
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         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_RATTLESNAKE, IPR_USE_MSI, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] }
199 };
200 
201 static int ipr_max_bus_speeds[] = {
202         IPR_80MBs_SCSI_RATE, IPR_U160_SCSI_RATE, IPR_U320_SCSI_RATE
203 };
204 
205 MODULE_AUTHOR("Brian King <brking@us.ibm.com>");
206 MODULE_DESCRIPTION("IBM Power RAID SCSI Adapter Driver");
207 module_param_named(max_speed, ipr_max_speed, uint, 0);
208 MODULE_PARM_DESC(max_speed, "Maximum bus speed (0-2). Default: 1=U160. Speeds: 0=80 MB/s, 1=U160, 2=U320");
209 module_param_named(log_level, ipr_log_level, uint, 0);
210 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver");
211 module_param_named(testmode, ipr_testmode, int, 0);
212 MODULE_PARM_DESC(testmode, "DANGEROUS!!! Allows unsupported configurations");
213 module_param_named(fastfail, ipr_fastfail, int, S_IRUGO | S_IWUSR);
214 MODULE_PARM_DESC(fastfail, "Reduce timeouts and retries");
215 module_param_named(transop_timeout, ipr_transop_timeout, int, 0);
216 MODULE_PARM_DESC(transop_timeout, "Time in seconds to wait for adapter to come operational (default: 300)");
217 module_param_named(debug, ipr_debug, int, S_IRUGO | S_IWUSR);
218 MODULE_PARM_DESC(debug, "Enable device driver debugging logging. Set to 1 to enable. (default: 0)");
219 module_param_named(dual_ioa_raid, ipr_dual_ioa_raid, int, 0);
220 MODULE_PARM_DESC(dual_ioa_raid, "Enable dual adapter RAID support. Set to 1 to enable. (default: 1)");
221 module_param_named(max_devs, ipr_max_devs, int, 0);
222 MODULE_PARM_DESC(max_devs, "Specify the maximum number of physical devices. "
223                  "[Default=" __stringify(IPR_DEFAULT_SIS64_DEVS) "]");
224 module_param_named(number_of_msix, ipr_number_of_msix, int, 0);
225 MODULE_PARM_DESC(number_of_msix, "Specify the number of MSIX interrupts to use on capable adapters (1 - 16).  (default:16)");
226 module_param_named(fast_reboot, ipr_fast_reboot, int, S_IRUGO | S_IWUSR);
227 MODULE_PARM_DESC(fast_reboot, "Skip adapter shutdown during reboot. Set to 1 to enable. (default: 0)");
228 MODULE_LICENSE("GPL");
229 MODULE_VERSION(IPR_DRIVER_VERSION);
230 
231 /*  A constant array of IOASCs/URCs/Error Messages */
232 static const
233 struct ipr_error_table_t ipr_error_table[] = {
234         {0x00000000, 1, IPR_DEFAULT_LOG_LEVEL,
235         "8155: An unknown error was received"},
236         {0x00330000, 0, 0,
237         "Soft underlength error"},
238         {0x005A0000, 0, 0,
239         "Command to be cancelled not found"},
240         {0x00808000, 0, 0,
241         "Qualified success"},
242         {0x01080000, 1, IPR_DEFAULT_LOG_LEVEL,
243         "FFFE: Soft device bus error recovered by the IOA"},
244         {0x01088100, 0, IPR_DEFAULT_LOG_LEVEL,
245         "4101: Soft device bus fabric error"},
246         {0x01100100, 0, IPR_DEFAULT_LOG_LEVEL,
247         "FFFC: Logical block guard error recovered by the device"},
248         {0x01100300, 0, IPR_DEFAULT_LOG_LEVEL,
249         "FFFC: Logical block reference tag error recovered by the device"},
250         {0x01108300, 0, IPR_DEFAULT_LOG_LEVEL,
251         "4171: Recovered scatter list tag / sequence number error"},
252         {0x01109000, 0, IPR_DEFAULT_LOG_LEVEL,
253         "FF3D: Recovered logical block CRC error on IOA to Host transfer"},
254         {0x01109200, 0, IPR_DEFAULT_LOG_LEVEL,
255         "4171: Recovered logical block sequence number error on IOA to Host transfer"},
256         {0x0110A000, 0, IPR_DEFAULT_LOG_LEVEL,
257         "FFFD: Recovered logical block reference tag error detected by the IOA"},
258         {0x0110A100, 0, IPR_DEFAULT_LOG_LEVEL,
259         "FFFD: Logical block guard error recovered by the IOA"},
260         {0x01170600, 0, IPR_DEFAULT_LOG_LEVEL,
261         "FFF9: Device sector reassign successful"},
262         {0x01170900, 0, IPR_DEFAULT_LOG_LEVEL,
263         "FFF7: Media error recovered by device rewrite procedures"},
264         {0x01180200, 0, IPR_DEFAULT_LOG_LEVEL,
265         "7001: IOA sector reassignment successful"},
266         {0x01180500, 0, IPR_DEFAULT_LOG_LEVEL,
267         "FFF9: Soft media error. Sector reassignment recommended"},
268         {0x01180600, 0, IPR_DEFAULT_LOG_LEVEL,
269         "FFF7: Media error recovered by IOA rewrite procedures"},
270         {0x01418000, 0, IPR_DEFAULT_LOG_LEVEL,
271         "FF3D: Soft PCI bus error recovered by the IOA"},
272         {0x01440000, 1, IPR_DEFAULT_LOG_LEVEL,
273         "FFF6: Device hardware error recovered by the IOA"},
274         {0x01448100, 0, IPR_DEFAULT_LOG_LEVEL,
275         "FFF6: Device hardware error recovered by the device"},
276         {0x01448200, 1, IPR_DEFAULT_LOG_LEVEL,
277         "FF3D: Soft IOA error recovered by the IOA"},
278         {0x01448300, 0, IPR_DEFAULT_LOG_LEVEL,
279         "FFFA: Undefined device response recovered by the IOA"},
280         {0x014A0000, 1, IPR_DEFAULT_LOG_LEVEL,
281         "FFF6: Device bus error, message or command phase"},
282         {0x014A8000, 0, IPR_DEFAULT_LOG_LEVEL,
283         "FFFE: Task Management Function failed"},
284         {0x015D0000, 0, IPR_DEFAULT_LOG_LEVEL,
285         "FFF6: Failure prediction threshold exceeded"},
286         {0x015D9200, 0, IPR_DEFAULT_LOG_LEVEL,
287         "8009: Impending cache battery pack failure"},
288         {0x02040100, 0, 0,
289         "Logical Unit in process of becoming ready"},
290         {0x02040200, 0, 0,
291         "Initializing command required"},
292         {0x02040400, 0, 0,
293         "34FF: Disk device format in progress"},
294         {0x02040C00, 0, 0,
295         "Logical unit not accessible, target port in unavailable state"},
296         {0x02048000, 0, IPR_DEFAULT_LOG_LEVEL,
297         "9070: IOA requested reset"},
298         {0x023F0000, 0, 0,
299         "Synchronization required"},
300         {0x02408500, 0, 0,
301         "IOA microcode download required"},
302         {0x02408600, 0, 0,
303         "Device bus connection is prohibited by host"},
304         {0x024E0000, 0, 0,
305         "No ready, IOA shutdown"},
306         {0x025A0000, 0, 0,
307         "Not ready, IOA has been shutdown"},
308         {0x02670100, 0, IPR_DEFAULT_LOG_LEVEL,
309         "3020: Storage subsystem configuration error"},
310         {0x03110B00, 0, 0,
311         "FFF5: Medium error, data unreadable, recommend reassign"},
312         {0x03110C00, 0, 0,
313         "7000: Medium error, data unreadable, do not reassign"},
314         {0x03310000, 0, IPR_DEFAULT_LOG_LEVEL,
315         "FFF3: Disk media format bad"},
316         {0x04050000, 0, IPR_DEFAULT_LOG_LEVEL,
317         "3002: Addressed device failed to respond to selection"},
318         {0x04080000, 1, IPR_DEFAULT_LOG_LEVEL,
319         "3100: Device bus error"},
320         {0x04080100, 0, IPR_DEFAULT_LOG_LEVEL,
321         "3109: IOA timed out a device command"},
322         {0x04088000, 0, 0,
323         "3120: SCSI bus is not operational"},
324         {0x04088100, 0, IPR_DEFAULT_LOG_LEVEL,
325         "4100: Hard device bus fabric error"},
326         {0x04100100, 0, IPR_DEFAULT_LOG_LEVEL,
327         "310C: Logical block guard error detected by the device"},
328         {0x04100300, 0, IPR_DEFAULT_LOG_LEVEL,
329         "310C: Logical block reference tag error detected by the device"},
330         {0x04108300, 1, IPR_DEFAULT_LOG_LEVEL,
331         "4170: Scatter list tag / sequence number error"},
332         {0x04109000, 1, IPR_DEFAULT_LOG_LEVEL,
333         "8150: Logical block CRC error on IOA to Host transfer"},
334         {0x04109200, 1, IPR_DEFAULT_LOG_LEVEL,
335         "4170: Logical block sequence number error on IOA to Host transfer"},
336         {0x0410A000, 0, IPR_DEFAULT_LOG_LEVEL,
337         "310D: Logical block reference tag error detected by the IOA"},
338         {0x0410A100, 0, IPR_DEFAULT_LOG_LEVEL,
339         "310D: Logical block guard error detected by the IOA"},
340         {0x04118000, 0, IPR_DEFAULT_LOG_LEVEL,
341         "9000: IOA reserved area data check"},
342         {0x04118100, 0, IPR_DEFAULT_LOG_LEVEL,
343         "9001: IOA reserved area invalid data pattern"},
344         {0x04118200, 0, IPR_DEFAULT_LOG_LEVEL,
345         "9002: IOA reserved area LRC error"},
346         {0x04118300, 1, IPR_DEFAULT_LOG_LEVEL,
347         "Hardware Error, IOA metadata access error"},
348         {0x04320000, 0, IPR_DEFAULT_LOG_LEVEL,
349         "102E: Out of alternate sectors for disk storage"},
350         {0x04330000, 1, IPR_DEFAULT_LOG_LEVEL,
351         "FFF4: Data transfer underlength error"},
352         {0x04338000, 1, IPR_DEFAULT_LOG_LEVEL,
353         "FFF4: Data transfer overlength error"},
354         {0x043E0100, 0, IPR_DEFAULT_LOG_LEVEL,
355         "3400: Logical unit failure"},
356         {0x04408500, 0, IPR_DEFAULT_LOG_LEVEL,
357         "FFF4: Device microcode is corrupt"},
358         {0x04418000, 1, IPR_DEFAULT_LOG_LEVEL,
359         "8150: PCI bus error"},
360         {0x04430000, 1, 0,
361         "Unsupported device bus message received"},
362         {0x04440000, 1, IPR_DEFAULT_LOG_LEVEL,
363         "FFF4: Disk device problem"},
364         {0x04448200, 1, IPR_DEFAULT_LOG_LEVEL,
365         "8150: Permanent IOA failure"},
366         {0x04448300, 0, IPR_DEFAULT_LOG_LEVEL,
367         "3010: Disk device returned wrong response to IOA"},
368         {0x04448400, 0, IPR_DEFAULT_LOG_LEVEL,
369         "8151: IOA microcode error"},
370         {0x04448500, 0, 0,
371         "Device bus status error"},
372         {0x04448600, 0, IPR_DEFAULT_LOG_LEVEL,
373         "8157: IOA error requiring IOA reset to recover"},
374         {0x04448700, 0, 0,
375         "ATA device status error"},
376         {0x04490000, 0, 0,
377         "Message reject received from the device"},
378         {0x04449200, 0, IPR_DEFAULT_LOG_LEVEL,
379         "8008: A permanent cache battery pack failure occurred"},
380         {0x0444A000, 0, IPR_DEFAULT_LOG_LEVEL,
381         "9090: Disk unit has been modified after the last known status"},
382         {0x0444A200, 0, IPR_DEFAULT_LOG_LEVEL,
383         "9081: IOA detected device error"},
384         {0x0444A300, 0, IPR_DEFAULT_LOG_LEVEL,
385         "9082: IOA detected device error"},
386         {0x044A0000, 1, IPR_DEFAULT_LOG_LEVEL,
387         "3110: Device bus error, message or command phase"},
388         {0x044A8000, 1, IPR_DEFAULT_LOG_LEVEL,
389         "3110: SAS Command / Task Management Function failed"},
390         {0x04670400, 0, IPR_DEFAULT_LOG_LEVEL,
391         "9091: Incorrect hardware configuration change has been detected"},
392         {0x04678000, 0, IPR_DEFAULT_LOG_LEVEL,
393         "9073: Invalid multi-adapter configuration"},
394         {0x04678100, 0, IPR_DEFAULT_LOG_LEVEL,
395         "4010: Incorrect connection between cascaded expanders"},
396         {0x04678200, 0, IPR_DEFAULT_LOG_LEVEL,
397         "4020: Connections exceed IOA design limits"},
398         {0x04678300, 0, IPR_DEFAULT_LOG_LEVEL,
399         "4030: Incorrect multipath connection"},
400         {0x04679000, 0, IPR_DEFAULT_LOG_LEVEL,
401         "4110: Unsupported enclosure function"},
402         {0x04679800, 0, IPR_DEFAULT_LOG_LEVEL,
403         "4120: SAS cable VPD cannot be read"},
404         {0x046E0000, 0, IPR_DEFAULT_LOG_LEVEL,
405         "FFF4: Command to logical unit failed"},
406         {0x05240000, 1, 0,
407         "Illegal request, invalid request type or request packet"},
408         {0x05250000, 0, 0,
409         "Illegal request, invalid resource handle"},
410         {0x05258000, 0, 0,
411         "Illegal request, commands not allowed to this device"},
412         {0x05258100, 0, 0,
413         "Illegal request, command not allowed to a secondary adapter"},
414         {0x05258200, 0, 0,
415         "Illegal request, command not allowed to a non-optimized resource"},
416         {0x05260000, 0, 0,
417         "Illegal request, invalid field in parameter list"},
418         {0x05260100, 0, 0,
419         "Illegal request, parameter not supported"},
420         {0x05260200, 0, 0,
421         "Illegal request, parameter value invalid"},
422         {0x052C0000, 0, 0,
423         "Illegal request, command sequence error"},
424         {0x052C8000, 1, 0,
425         "Illegal request, dual adapter support not enabled"},
426         {0x052C8100, 1, 0,
427         "Illegal request, another cable connector was physically disabled"},
428         {0x054E8000, 1, 0,
429         "Illegal request, inconsistent group id/group count"},
430         {0x06040500, 0, IPR_DEFAULT_LOG_LEVEL,
431         "9031: Array protection temporarily suspended, protection resuming"},
432         {0x06040600, 0, IPR_DEFAULT_LOG_LEVEL,
433         "9040: Array protection temporarily suspended, protection resuming"},
434         {0x060B0100, 0, IPR_DEFAULT_LOG_LEVEL,
435         "4080: IOA exceeded maximum operating temperature"},
436         {0x060B8000, 0, IPR_DEFAULT_LOG_LEVEL,
437         "4085: Service required"},
438         {0x06288000, 0, IPR_DEFAULT_LOG_LEVEL,
439         "3140: Device bus not ready to ready transition"},
440         {0x06290000, 0, IPR_DEFAULT_LOG_LEVEL,
441         "FFFB: SCSI bus was reset"},
442         {0x06290500, 0, 0,
443         "FFFE: SCSI bus transition to single ended"},
444         {0x06290600, 0, 0,
445         "FFFE: SCSI bus transition to LVD"},
446         {0x06298000, 0, IPR_DEFAULT_LOG_LEVEL,
447         "FFFB: SCSI bus was reset by another initiator"},
448         {0x063F0300, 0, IPR_DEFAULT_LOG_LEVEL,
449         "3029: A device replacement has occurred"},
450         {0x063F8300, 0, IPR_DEFAULT_LOG_LEVEL,
451         "4102: Device bus fabric performance degradation"},
452         {0x064C8000, 0, IPR_DEFAULT_LOG_LEVEL,
453         "9051: IOA cache data exists for a missing or failed device"},
454         {0x064C8100, 0, IPR_DEFAULT_LOG_LEVEL,
455         "9055: Auxiliary cache IOA contains cache data needed by the primary IOA"},
456         {0x06670100, 0, IPR_DEFAULT_LOG_LEVEL,
457         "9025: Disk unit is not supported at its physical location"},
458         {0x06670600, 0, IPR_DEFAULT_LOG_LEVEL,
459         "3020: IOA detected a SCSI bus configuration error"},
460         {0x06678000, 0, IPR_DEFAULT_LOG_LEVEL,
461         "3150: SCSI bus configuration error"},
462         {0x06678100, 0, IPR_DEFAULT_LOG_LEVEL,
463         "9074: Asymmetric advanced function disk configuration"},
464         {0x06678300, 0, IPR_DEFAULT_LOG_LEVEL,
465         "4040: Incomplete multipath connection between IOA and enclosure"},
466         {0x06678400, 0, IPR_DEFAULT_LOG_LEVEL,
467         "4041: Incomplete multipath connection between enclosure and device"},
468         {0x06678500, 0, IPR_DEFAULT_LOG_LEVEL,
469         "9075: Incomplete multipath connection between IOA and remote IOA"},
470         {0x06678600, 0, IPR_DEFAULT_LOG_LEVEL,
471         "9076: Configuration error, missing remote IOA"},
472         {0x06679100, 0, IPR_DEFAULT_LOG_LEVEL,
473         "4050: Enclosure does not support a required multipath function"},
474         {0x06679800, 0, IPR_DEFAULT_LOG_LEVEL,
475         "4121: Configuration error, required cable is missing"},
476         {0x06679900, 0, IPR_DEFAULT_LOG_LEVEL,
477         "4122: Cable is not plugged into the correct location on remote IOA"},
478         {0x06679A00, 0, IPR_DEFAULT_LOG_LEVEL,
479         "4123: Configuration error, invalid cable vital product data"},
480         {0x06679B00, 0, IPR_DEFAULT_LOG_LEVEL,
481         "4124: Configuration error, both cable ends are plugged into the same IOA"},
482         {0x06690000, 0, IPR_DEFAULT_LOG_LEVEL,
483         "4070: Logically bad block written on device"},
484         {0x06690200, 0, IPR_DEFAULT_LOG_LEVEL,
485         "9041: Array protection temporarily suspended"},
486         {0x06698200, 0, IPR_DEFAULT_LOG_LEVEL,
487         "9042: Corrupt array parity detected on specified device"},
488         {0x066B0200, 0, IPR_DEFAULT_LOG_LEVEL,
489         "9030: Array no longer protected due to missing or failed disk unit"},
490         {0x066B8000, 0, IPR_DEFAULT_LOG_LEVEL,
491         "9071: Link operational transition"},
492         {0x066B8100, 0, IPR_DEFAULT_LOG_LEVEL,
493         "9072: Link not operational transition"},
494         {0x066B8200, 0, IPR_DEFAULT_LOG_LEVEL,
495         "9032: Array exposed but still protected"},
496         {0x066B8300, 0, IPR_DEFAULT_LOG_LEVEL + 1,
497         "70DD: Device forced failed by disrupt device command"},
498         {0x066B9100, 0, IPR_DEFAULT_LOG_LEVEL,
499         "4061: Multipath redundancy level got better"},
500         {0x066B9200, 0, IPR_DEFAULT_LOG_LEVEL,
501         "4060: Multipath redundancy level got worse"},
502         {0x06808100, 0, IPR_DEFAULT_LOG_LEVEL,
503         "9083: Device raw mode enabled"},
504         {0x06808200, 0, IPR_DEFAULT_LOG_LEVEL,
505         "9084: Device raw mode disabled"},
506         {0x07270000, 0, 0,
507         "Failure due to other device"},
508         {0x07278000, 0, IPR_DEFAULT_LOG_LEVEL,
509         "9008: IOA does not support functions expected by devices"},
510         {0x07278100, 0, IPR_DEFAULT_LOG_LEVEL,
511         "9010: Cache data associated with attached devices cannot be found"},
512         {0x07278200, 0, IPR_DEFAULT_LOG_LEVEL,
513         "9011: Cache data belongs to devices other than those attached"},
514         {0x07278400, 0, IPR_DEFAULT_LOG_LEVEL,
515         "9020: Array missing 2 or more devices with only 1 device present"},
516         {0x07278500, 0, IPR_DEFAULT_LOG_LEVEL,
517         "9021: Array missing 2 or more devices with 2 or more devices present"},
518         {0x07278600, 0, IPR_DEFAULT_LOG_LEVEL,
519         "9022: Exposed array is missing a required device"},
520         {0x07278700, 0, IPR_DEFAULT_LOG_LEVEL,
521         "9023: Array member(s) not at required physical locations"},
522         {0x07278800, 0, IPR_DEFAULT_LOG_LEVEL,
523         "9024: Array not functional due to present hardware configuration"},
524         {0x07278900, 0, IPR_DEFAULT_LOG_LEVEL,
525         "9026: Array not functional due to present hardware configuration"},
526         {0x07278A00, 0, IPR_DEFAULT_LOG_LEVEL,
527         "9027: Array is missing a device and parity is out of sync"},
528         {0x07278B00, 0, IPR_DEFAULT_LOG_LEVEL,
529         "9028: Maximum number of arrays already exist"},
530         {0x07278C00, 0, IPR_DEFAULT_LOG_LEVEL,
531         "9050: Required cache data cannot be located for a disk unit"},
532         {0x07278D00, 0, IPR_DEFAULT_LOG_LEVEL,
533         "9052: Cache data exists for a device that has been modified"},
534         {0x07278F00, 0, IPR_DEFAULT_LOG_LEVEL,
535         "9054: IOA resources not available due to previous problems"},
536         {0x07279100, 0, IPR_DEFAULT_LOG_LEVEL,
537         "9092: Disk unit requires initialization before use"},
538         {0x07279200, 0, IPR_DEFAULT_LOG_LEVEL,
539         "9029: Incorrect hardware configuration change has been detected"},
540         {0x07279600, 0, IPR_DEFAULT_LOG_LEVEL,
541         "9060: One or more disk pairs are missing from an array"},
542         {0x07279700, 0, IPR_DEFAULT_LOG_LEVEL,
543         "9061: One or more disks are missing from an array"},
544         {0x07279800, 0, IPR_DEFAULT_LOG_LEVEL,
545         "9062: One or more disks are missing from an array"},
546         {0x07279900, 0, IPR_DEFAULT_LOG_LEVEL,
547         "9063: Maximum number of functional arrays has been exceeded"},
548         {0x07279A00, 0, 0,
549         "Data protect, other volume set problem"},
550         {0x0B260000, 0, 0,
551         "Aborted command, invalid descriptor"},
552         {0x0B3F9000, 0, 0,
553         "Target operating conditions have changed, dual adapter takeover"},
554         {0x0B530200, 0, 0,
555         "Aborted command, medium removal prevented"},
556         {0x0B5A0000, 0, 0,
557         "Command terminated by host"},
558         {0x0B5B8000, 0, 0,
559         "Aborted command, command terminated by host"}
560 };
561 
562 static const struct ipr_ses_table_entry ipr_ses_table[] = {
563         { "2104-DL1        ", "XXXXXXXXXXXXXXXX", 80 },
564         { "2104-TL1        ", "XXXXXXXXXXXXXXXX", 80 },
565         { "HSBP07M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 7 slot */
566         { "HSBP05M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 5 slot */
567         { "HSBP05M S U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Bowtie */
568         { "HSBP06E ASU2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* MartinFenning */
569         { "2104-DU3        ", "XXXXXXXXXXXXXXXX", 160 },
570         { "2104-TU3        ", "XXXXXXXXXXXXXXXX", 160 },
571         { "HSBP04C RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
572         { "HSBP06E RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
573         { "St  V1S2        ", "XXXXXXXXXXXXXXXX", 160 },
574         { "HSBPD4M  PU3SCSI", "XXXXXXX*XXXXXXXX", 160 },
575         { "VSBPD1H   U3SCSI", "XXXXXXX*XXXXXXXX", 160 }
576 };
577 
578 /*
579  *  Function Prototypes
580  */
581 static int ipr_reset_alert(struct ipr_cmnd *);
582 static void ipr_process_ccn(struct ipr_cmnd *);
583 static void ipr_process_error(struct ipr_cmnd *);
584 static void ipr_reset_ioa_job(struct ipr_cmnd *);
585 static void ipr_initiate_ioa_reset(struct ipr_ioa_cfg *,
586                                    enum ipr_shutdown_type);
587 
588 #ifdef CONFIG_SCSI_IPR_TRACE
589 /**
590  * ipr_trc_hook - Add a trace entry to the driver trace
591  * @ipr_cmd:    ipr command struct
592  * @type:               trace type
593  * @add_data:   additional data
594  *
595  * Return value:
596  *      none
597  **/
598 static void ipr_trc_hook(struct ipr_cmnd *ipr_cmd,
599                          u8 type, u32 add_data)
600 {
601         struct ipr_trace_entry *trace_entry;
602         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
603         unsigned int trace_index;
604 
605         trace_index = atomic_add_return(1, &ioa_cfg->trace_index) & IPR_TRACE_INDEX_MASK;
606         trace_entry = &ioa_cfg->trace[trace_index];
607         trace_entry->time = jiffies;
608         trace_entry->op_code = ipr_cmd->ioarcb.cmd_pkt.cdb[0];
609         trace_entry->type = type;
610         if (ipr_cmd->ioa_cfg->sis64)
611                 trace_entry->ata_op_code = ipr_cmd->i.ata_ioadl.regs.command;
612         else
613                 trace_entry->ata_op_code = ipr_cmd->ioarcb.u.add_data.u.regs.command;
614         trace_entry->cmd_index = ipr_cmd->cmd_index & 0xff;
615         trace_entry->res_handle = ipr_cmd->ioarcb.res_handle;
616         trace_entry->u.add_data = add_data;
617         wmb();
618 }
619 #else
620 #define ipr_trc_hook(ipr_cmd, type, add_data) do { } while (0)
621 #endif
622 
623 /**
624  * ipr_lock_and_done - Acquire lock and complete command
625  * @ipr_cmd:    ipr command struct
626  *
627  * Return value:
628  *      none
629  **/
630 static void ipr_lock_and_done(struct ipr_cmnd *ipr_cmd)
631 {
632         unsigned long lock_flags;
633         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
634 
635         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
636         ipr_cmd->done(ipr_cmd);
637         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
638 }
639 
640 /**
641  * ipr_reinit_ipr_cmnd - Re-initialize an IPR Cmnd block for reuse
642  * @ipr_cmd:    ipr command struct
643  *
644  * Return value:
645  *      none
646  **/
647 static void ipr_reinit_ipr_cmnd(struct ipr_cmnd *ipr_cmd)
648 {
649         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
650         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
651         struct ipr_ioasa64 *ioasa64 = &ipr_cmd->s.ioasa64;
652         dma_addr_t dma_addr = ipr_cmd->dma_addr;
653         int hrrq_id;
654 
655         hrrq_id = ioarcb->cmd_pkt.hrrq_id;
656         memset(&ioarcb->cmd_pkt, 0, sizeof(struct ipr_cmd_pkt));
657         ioarcb->cmd_pkt.hrrq_id = hrrq_id;
658         ioarcb->data_transfer_length = 0;
659         ioarcb->read_data_transfer_length = 0;
660         ioarcb->ioadl_len = 0;
661         ioarcb->read_ioadl_len = 0;
662 
663         if (ipr_cmd->ioa_cfg->sis64) {
664                 ioarcb->u.sis64_addr_data.data_ioadl_addr =
665                         cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ioadl64));
666                 ioasa64->u.gata.status = 0;
667         } else {
668                 ioarcb->write_ioadl_addr =
669                         cpu_to_be32(dma_addr + offsetof(struct ipr_cmnd, i.ioadl));
670                 ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
671                 ioasa->u.gata.status = 0;
672         }
673 
674         ioasa->hdr.ioasc = 0;
675         ioasa->hdr.residual_data_len = 0;
676         ipr_cmd->scsi_cmd = NULL;
677         ipr_cmd->qc = NULL;
678         ipr_cmd->sense_buffer[0] = 0;
679         ipr_cmd->dma_use_sg = 0;
680 }
681 
682 /**
683  * ipr_init_ipr_cmnd - Initialize an IPR Cmnd block
684  * @ipr_cmd:    ipr command struct
685  *
686  * Return value:
687  *      none
688  **/
689 static void ipr_init_ipr_cmnd(struct ipr_cmnd *ipr_cmd,
690                               void (*fast_done) (struct ipr_cmnd *))
691 {
692         ipr_reinit_ipr_cmnd(ipr_cmd);
693         ipr_cmd->u.scratch = 0;
694         ipr_cmd->sibling = NULL;
695         ipr_cmd->eh_comp = NULL;
696         ipr_cmd->fast_done = fast_done;
697         init_timer(&ipr_cmd->timer);
698 }
699 
700 /**
701  * __ipr_get_free_ipr_cmnd - Get a free IPR Cmnd block
702  * @ioa_cfg:    ioa config struct
703  *
704  * Return value:
705  *      pointer to ipr command struct
706  **/
707 static
708 struct ipr_cmnd *__ipr_get_free_ipr_cmnd(struct ipr_hrr_queue *hrrq)
709 {
710         struct ipr_cmnd *ipr_cmd = NULL;
711 
712         if (likely(!list_empty(&hrrq->hrrq_free_q))) {
713                 ipr_cmd = list_entry(hrrq->hrrq_free_q.next,
714                         struct ipr_cmnd, queue);
715                 list_del(&ipr_cmd->queue);
716         }
717 
718 
719         return ipr_cmd;
720 }
721 
722 /**
723  * ipr_get_free_ipr_cmnd - Get a free IPR Cmnd block and initialize it
724  * @ioa_cfg:    ioa config struct
725  *
726  * Return value:
727  *      pointer to ipr command struct
728  **/
729 static
730 struct ipr_cmnd *ipr_get_free_ipr_cmnd(struct ipr_ioa_cfg *ioa_cfg)
731 {
732         struct ipr_cmnd *ipr_cmd =
733                 __ipr_get_free_ipr_cmnd(&ioa_cfg->hrrq[IPR_INIT_HRRQ]);
734         ipr_init_ipr_cmnd(ipr_cmd, ipr_lock_and_done);
735         return ipr_cmd;
736 }
737 
738 /**
739  * ipr_mask_and_clear_interrupts - Mask all and clear specified interrupts
740  * @ioa_cfg:    ioa config struct
741  * @clr_ints:     interrupts to clear
742  *
743  * This function masks all interrupts on the adapter, then clears the
744  * interrupts specified in the mask
745  *
746  * Return value:
747  *      none
748  **/
749 static void ipr_mask_and_clear_interrupts(struct ipr_ioa_cfg *ioa_cfg,
750                                           u32 clr_ints)
751 {
752         volatile u32 int_reg;
753         int i;
754 
755         /* Stop new interrupts */
756         for (i = 0; i < ioa_cfg->hrrq_num; i++) {
757                 spin_lock(&ioa_cfg->hrrq[i]._lock);
758                 ioa_cfg->hrrq[i].allow_interrupts = 0;
759                 spin_unlock(&ioa_cfg->hrrq[i]._lock);
760         }
761         wmb();
762 
763         /* Set interrupt mask to stop all new interrupts */
764         if (ioa_cfg->sis64)
765                 writeq(~0, ioa_cfg->regs.set_interrupt_mask_reg);
766         else
767                 writel(~0, ioa_cfg->regs.set_interrupt_mask_reg);
768 
769         /* Clear any pending interrupts */
770         if (ioa_cfg->sis64)
771                 writel(~0, ioa_cfg->regs.clr_interrupt_reg);
772         writel(clr_ints, ioa_cfg->regs.clr_interrupt_reg32);
773         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
774 }
775 
776 /**
777  * ipr_save_pcix_cmd_reg - Save PCI-X command register
778  * @ioa_cfg:    ioa config struct
779  *
780  * Return value:
781  *      0 on success / -EIO on failure
782  **/
783 static int ipr_save_pcix_cmd_reg(struct ipr_ioa_cfg *ioa_cfg)
784 {
785         int pcix_cmd_reg = pci_find_capability(ioa_cfg->pdev, PCI_CAP_ID_PCIX);
786 
787         if (pcix_cmd_reg == 0)
788                 return 0;
789 
790         if (pci_read_config_word(ioa_cfg->pdev, pcix_cmd_reg + PCI_X_CMD,
791                                  &ioa_cfg->saved_pcix_cmd_reg) != PCIBIOS_SUCCESSFUL) {
792                 dev_err(&ioa_cfg->pdev->dev, "Failed to save PCI-X command register\n");
793                 return -EIO;
794         }
795 
796         ioa_cfg->saved_pcix_cmd_reg |= PCI_X_CMD_DPERR_E | PCI_X_CMD_ERO;
797         return 0;
798 }
799 
800 /**
801  * ipr_set_pcix_cmd_reg - Setup PCI-X command register
802  * @ioa_cfg:    ioa config struct
803  *
804  * Return value:
805  *      0 on success / -EIO on failure
806  **/
807 static int ipr_set_pcix_cmd_reg(struct ipr_ioa_cfg *ioa_cfg)
808 {
809         int pcix_cmd_reg = pci_find_capability(ioa_cfg->pdev, PCI_CAP_ID_PCIX);
810 
811         if (pcix_cmd_reg) {
812                 if (pci_write_config_word(ioa_cfg->pdev, pcix_cmd_reg + PCI_X_CMD,
813                                           ioa_cfg->saved_pcix_cmd_reg) != PCIBIOS_SUCCESSFUL) {
814                         dev_err(&ioa_cfg->pdev->dev, "Failed to setup PCI-X command register\n");
815                         return -EIO;
816                 }
817         }
818 
819         return 0;
820 }
821 
822 /**
823  * ipr_sata_eh_done - done function for aborted SATA commands
824  * @ipr_cmd:    ipr command struct
825  *
826  * This function is invoked for ops generated to SATA
827  * devices which are being aborted.
828  *
829  * Return value:
830  *      none
831  **/
832 static void ipr_sata_eh_done(struct ipr_cmnd *ipr_cmd)
833 {
834         struct ata_queued_cmd *qc = ipr_cmd->qc;
835         struct ipr_sata_port *sata_port = qc->ap->private_data;
836 
837         qc->err_mask |= AC_ERR_OTHER;
838         sata_port->ioasa.status |= ATA_BUSY;
839         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
840         ata_qc_complete(qc);
841 }
842 
843 /**
844  * ipr_scsi_eh_done - mid-layer done function for aborted ops
845  * @ipr_cmd:    ipr command struct
846  *
847  * This function is invoked by the interrupt handler for
848  * ops generated by the SCSI mid-layer which are being aborted.
849  *
850  * Return value:
851  *      none
852  **/
853 static void ipr_scsi_eh_done(struct ipr_cmnd *ipr_cmd)
854 {
855         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
856 
857         scsi_cmd->result |= (DID_ERROR << 16);
858 
859         scsi_dma_unmap(ipr_cmd->scsi_cmd);
860         scsi_cmd->scsi_done(scsi_cmd);
861         if (ipr_cmd->eh_comp)
862                 complete(ipr_cmd->eh_comp);
863         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
864 }
865 
866 /**
867  * ipr_fail_all_ops - Fails all outstanding ops.
868  * @ioa_cfg:    ioa config struct
869  *
870  * This function fails all outstanding ops.
871  *
872  * Return value:
873  *      none
874  **/
875 static void ipr_fail_all_ops(struct ipr_ioa_cfg *ioa_cfg)
876 {
877         struct ipr_cmnd *ipr_cmd, *temp;
878         struct ipr_hrr_queue *hrrq;
879 
880         ENTER;
881         for_each_hrrq(hrrq, ioa_cfg) {
882                 spin_lock(&hrrq->_lock);
883                 list_for_each_entry_safe(ipr_cmd,
884                                         temp, &hrrq->hrrq_pending_q, queue) {
885                         list_del(&ipr_cmd->queue);
886 
887                         ipr_cmd->s.ioasa.hdr.ioasc =
888                                 cpu_to_be32(IPR_IOASC_IOA_WAS_RESET);
889                         ipr_cmd->s.ioasa.hdr.ilid =
890                                 cpu_to_be32(IPR_DRIVER_ILID);
891 
892                         if (ipr_cmd->scsi_cmd)
893                                 ipr_cmd->done = ipr_scsi_eh_done;
894                         else if (ipr_cmd->qc)
895                                 ipr_cmd->done = ipr_sata_eh_done;
896 
897                         ipr_trc_hook(ipr_cmd, IPR_TRACE_FINISH,
898                                      IPR_IOASC_IOA_WAS_RESET);
899                         del_timer(&ipr_cmd->timer);
900                         ipr_cmd->done(ipr_cmd);
901                 }
902                 spin_unlock(&hrrq->_lock);
903         }
904         LEAVE;
905 }
906 
907 /**
908  * ipr_send_command -  Send driver initiated requests.
909  * @ipr_cmd:            ipr command struct
910  *
911  * This function sends a command to the adapter using the correct write call.
912  * In the case of sis64, calculate the ioarcb size required. Then or in the
913  * appropriate bits.
914  *
915  * Return value:
916  *      none
917  **/
918 static void ipr_send_command(struct ipr_cmnd *ipr_cmd)
919 {
920         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
921         dma_addr_t send_dma_addr = ipr_cmd->dma_addr;
922 
923         if (ioa_cfg->sis64) {
924                 /* The default size is 256 bytes */
925                 send_dma_addr |= 0x1;
926 
927                 /* If the number of ioadls * size of ioadl > 128 bytes,
928                    then use a 512 byte ioarcb */
929                 if (ipr_cmd->dma_use_sg * sizeof(struct ipr_ioadl64_desc) > 128 )
930                         send_dma_addr |= 0x4;
931                 writeq(send_dma_addr, ioa_cfg->regs.ioarrin_reg);
932         } else
933                 writel(send_dma_addr, ioa_cfg->regs.ioarrin_reg);
934 }
935 
936 /**
937  * ipr_do_req -  Send driver initiated requests.
938  * @ipr_cmd:            ipr command struct
939  * @done:                       done function
940  * @timeout_func:       timeout function
941  * @timeout:            timeout value
942  *
943  * This function sends the specified command to the adapter with the
944  * timeout given. The done function is invoked on command completion.
945  *
946  * Return value:
947  *      none
948  **/
949 static void ipr_do_req(struct ipr_cmnd *ipr_cmd,
950                        void (*done) (struct ipr_cmnd *),
951                        void (*timeout_func) (struct ipr_cmnd *), u32 timeout)
952 {
953         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
954 
955         ipr_cmd->done = done;
956 
957         ipr_cmd->timer.data = (unsigned long) ipr_cmd;
958         ipr_cmd->timer.expires = jiffies + timeout;
959         ipr_cmd->timer.function = (void (*)(unsigned long))timeout_func;
960 
961         add_timer(&ipr_cmd->timer);
962 
963         ipr_trc_hook(ipr_cmd, IPR_TRACE_START, 0);
964 
965         ipr_send_command(ipr_cmd);
966 }
967 
968 /**
969  * ipr_internal_cmd_done - Op done function for an internally generated op.
970  * @ipr_cmd:    ipr command struct
971  *
972  * This function is the op done function for an internally generated,
973  * blocking op. It simply wakes the sleeping thread.
974  *
975  * Return value:
976  *      none
977  **/
978 static void ipr_internal_cmd_done(struct ipr_cmnd *ipr_cmd)
979 {
980         if (ipr_cmd->sibling)
981                 ipr_cmd->sibling = NULL;
982         else
983                 complete(&ipr_cmd->completion);
984 }
985 
986 /**
987  * ipr_init_ioadl - initialize the ioadl for the correct SIS type
988  * @ipr_cmd:    ipr command struct
989  * @dma_addr:   dma address
990  * @len:        transfer length
991  * @flags:      ioadl flag value
992  *
993  * This function initializes an ioadl in the case where there is only a single
994  * descriptor.
995  *
996  * Return value:
997  *      nothing
998  **/
999 static void ipr_init_ioadl(struct ipr_cmnd *ipr_cmd, dma_addr_t dma_addr,
1000                            u32 len, int flags)
1001 {
1002         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
1003         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
1004 
1005         ipr_cmd->dma_use_sg = 1;
1006 
1007         if (ipr_cmd->ioa_cfg->sis64) {
1008                 ioadl64->flags = cpu_to_be32(flags);
1009                 ioadl64->data_len = cpu_to_be32(len);
1010                 ioadl64->address = cpu_to_be64(dma_addr);
1011 
1012                 ipr_cmd->ioarcb.ioadl_len =
1013                         cpu_to_be32(sizeof(struct ipr_ioadl64_desc));
1014                 ipr_cmd->ioarcb.data_transfer_length = cpu_to_be32(len);
1015         } else {
1016                 ioadl->flags_and_data_len = cpu_to_be32(flags | len);
1017                 ioadl->address = cpu_to_be32(dma_addr);
1018 
1019                 if (flags == IPR_IOADL_FLAGS_READ_LAST) {
1020                         ipr_cmd->ioarcb.read_ioadl_len =
1021                                 cpu_to_be32(sizeof(struct ipr_ioadl_desc));
1022                         ipr_cmd->ioarcb.read_data_transfer_length = cpu_to_be32(len);
1023                 } else {
1024                         ipr_cmd->ioarcb.ioadl_len =
1025                                 cpu_to_be32(sizeof(struct ipr_ioadl_desc));
1026                         ipr_cmd->ioarcb.data_transfer_length = cpu_to_be32(len);
1027                 }
1028         }
1029 }
1030 
1031 /**
1032  * ipr_send_blocking_cmd - Send command and sleep on its completion.
1033  * @ipr_cmd:    ipr command struct
1034  * @timeout_func:       function to invoke if command times out
1035  * @timeout:    timeout
1036  *
1037  * Return value:
1038  *      none
1039  **/
1040 static void ipr_send_blocking_cmd(struct ipr_cmnd *ipr_cmd,
1041                                   void (*timeout_func) (struct ipr_cmnd *ipr_cmd),
1042                                   u32 timeout)
1043 {
1044         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
1045 
1046         init_completion(&ipr_cmd->completion);
1047         ipr_do_req(ipr_cmd, ipr_internal_cmd_done, timeout_func, timeout);
1048 
1049         spin_unlock_irq(ioa_cfg->host->host_lock);
1050         wait_for_completion(&ipr_cmd->completion);
1051         spin_lock_irq(ioa_cfg->host->host_lock);
1052 }
1053 
1054 static int ipr_get_hrrq_index(struct ipr_ioa_cfg *ioa_cfg)
1055 {
1056         unsigned int hrrq;
1057 
1058         if (ioa_cfg->hrrq_num == 1)
1059                 hrrq = 0;
1060         else {
1061                 hrrq = atomic_add_return(1, &ioa_cfg->hrrq_index);
1062                 hrrq = (hrrq % (ioa_cfg->hrrq_num - 1)) + 1;
1063         }
1064         return hrrq;
1065 }
1066 
1067 /**
1068  * ipr_send_hcam - Send an HCAM to the adapter.
1069  * @ioa_cfg:    ioa config struct
1070  * @type:               HCAM type
1071  * @hostrcb:    hostrcb struct
1072  *
1073  * This function will send a Host Controlled Async command to the adapter.
1074  * If HCAMs are currently not allowed to be issued to the adapter, it will
1075  * place the hostrcb on the free queue.
1076  *
1077  * Return value:
1078  *      none
1079  **/
1080 static void ipr_send_hcam(struct ipr_ioa_cfg *ioa_cfg, u8 type,
1081                           struct ipr_hostrcb *hostrcb)
1082 {
1083         struct ipr_cmnd *ipr_cmd;
1084         struct ipr_ioarcb *ioarcb;
1085 
1086         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds) {
1087                 ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
1088                 list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
1089                 list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_pending_q);
1090 
1091                 ipr_cmd->u.hostrcb = hostrcb;
1092                 ioarcb = &ipr_cmd->ioarcb;
1093 
1094                 ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
1095                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_HCAM;
1096                 ioarcb->cmd_pkt.cdb[0] = IPR_HOST_CONTROLLED_ASYNC;
1097                 ioarcb->cmd_pkt.cdb[1] = type;
1098                 ioarcb->cmd_pkt.cdb[7] = (sizeof(hostrcb->hcam) >> 8) & 0xff;
1099                 ioarcb->cmd_pkt.cdb[8] = sizeof(hostrcb->hcam) & 0xff;
1100 
1101                 ipr_init_ioadl(ipr_cmd, hostrcb->hostrcb_dma,
1102                                sizeof(hostrcb->hcam), IPR_IOADL_FLAGS_READ_LAST);
1103 
1104                 if (type == IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE)
1105                         ipr_cmd->done = ipr_process_ccn;
1106                 else
1107                         ipr_cmd->done = ipr_process_error;
1108 
1109                 ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_IOA_RES_ADDR);
1110 
1111                 ipr_send_command(ipr_cmd);
1112         } else {
1113                 list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_free_q);
1114         }
1115 }
1116 
1117 /**
1118  * ipr_update_ata_class - Update the ata class in the resource entry
1119  * @res:        resource entry struct
1120  * @proto:      cfgte device bus protocol value
1121  *
1122  * Return value:
1123  *      none
1124  **/
1125 static void ipr_update_ata_class(struct ipr_resource_entry *res, unsigned int proto)
1126 {
1127         switch (proto) {
1128         case IPR_PROTO_SATA:
1129         case IPR_PROTO_SAS_STP:
1130                 res->ata_class = ATA_DEV_ATA;
1131                 break;
1132         case IPR_PROTO_SATA_ATAPI:
1133         case IPR_PROTO_SAS_STP_ATAPI:
1134                 res->ata_class = ATA_DEV_ATAPI;
1135                 break;
1136         default:
1137                 res->ata_class = ATA_DEV_UNKNOWN;
1138                 break;
1139         };
1140 }
1141 
1142 /**
1143  * ipr_init_res_entry - Initialize a resource entry struct.
1144  * @res:        resource entry struct
1145  * @cfgtew:     config table entry wrapper struct
1146  *
1147  * Return value:
1148  *      none
1149  **/
1150 static void ipr_init_res_entry(struct ipr_resource_entry *res,
1151                                struct ipr_config_table_entry_wrapper *cfgtew)
1152 {
1153         int found = 0;
1154         unsigned int proto;
1155         struct ipr_ioa_cfg *ioa_cfg = res->ioa_cfg;
1156         struct ipr_resource_entry *gscsi_res = NULL;
1157 
1158         res->needs_sync_complete = 0;
1159         res->in_erp = 0;
1160         res->add_to_ml = 0;
1161         res->del_from_ml = 0;
1162         res->resetting_device = 0;
1163         res->reset_occurred = 0;
1164         res->sdev = NULL;
1165         res->sata_port = NULL;
1166 
1167         if (ioa_cfg->sis64) {
1168                 proto = cfgtew->u.cfgte64->proto;
1169                 res->flags = be16_to_cpu(cfgtew->u.cfgte64->flags);
1170                 res->res_flags = be16_to_cpu(cfgtew->u.cfgte64->res_flags);
1171                 res->qmodel = IPR_QUEUEING_MODEL64(res);
1172                 res->type = cfgtew->u.cfgte64->res_type;
1173 
1174                 memcpy(res->res_path, &cfgtew->u.cfgte64->res_path,
1175                         sizeof(res->res_path));
1176 
1177                 res->bus = 0;
1178                 memcpy(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1179                         sizeof(res->dev_lun.scsi_lun));
1180                 res->lun = scsilun_to_int(&res->dev_lun);
1181 
1182                 if (res->type == IPR_RES_TYPE_GENERIC_SCSI) {
1183                         list_for_each_entry(gscsi_res, &ioa_cfg->used_res_q, queue) {
1184                                 if (gscsi_res->dev_id == cfgtew->u.cfgte64->dev_id) {
1185                                         found = 1;
1186                                         res->target = gscsi_res->target;
1187                                         break;
1188                                 }
1189                         }
1190                         if (!found) {
1191                                 res->target = find_first_zero_bit(ioa_cfg->target_ids,
1192                                                                   ioa_cfg->max_devs_supported);
1193                                 set_bit(res->target, ioa_cfg->target_ids);
1194                         }
1195                 } else if (res->type == IPR_RES_TYPE_IOAFP) {
1196                         res->bus = IPR_IOAFP_VIRTUAL_BUS;
1197                         res->target = 0;
1198                 } else if (res->type == IPR_RES_TYPE_ARRAY) {
1199                         res->bus = IPR_ARRAY_VIRTUAL_BUS;
1200                         res->target = find_first_zero_bit(ioa_cfg->array_ids,
1201                                                           ioa_cfg->max_devs_supported);
1202                         set_bit(res->target, ioa_cfg->array_ids);
1203                 } else if (res->type == IPR_RES_TYPE_VOLUME_SET) {
1204                         res->bus = IPR_VSET_VIRTUAL_BUS;
1205                         res->target = find_first_zero_bit(ioa_cfg->vset_ids,
1206                                                           ioa_cfg->max_devs_supported);
1207                         set_bit(res->target, ioa_cfg->vset_ids);
1208                 } else {
1209                         res->target = find_first_zero_bit(ioa_cfg->target_ids,
1210                                                           ioa_cfg->max_devs_supported);
1211                         set_bit(res->target, ioa_cfg->target_ids);
1212                 }
1213         } else {
1214                 proto = cfgtew->u.cfgte->proto;
1215                 res->qmodel = IPR_QUEUEING_MODEL(res);
1216                 res->flags = cfgtew->u.cfgte->flags;
1217                 if (res->flags & IPR_IS_IOA_RESOURCE)
1218                         res->type = IPR_RES_TYPE_IOAFP;
1219                 else
1220                         res->type = cfgtew->u.cfgte->rsvd_subtype & 0x0f;
1221 
1222                 res->bus = cfgtew->u.cfgte->res_addr.bus;
1223                 res->target = cfgtew->u.cfgte->res_addr.target;
1224                 res->lun = cfgtew->u.cfgte->res_addr.lun;
1225                 res->lun_wwn = get_unaligned_be64(cfgtew->u.cfgte->lun_wwn);
1226         }
1227 
1228         ipr_update_ata_class(res, proto);
1229 }
1230 
1231 /**
1232  * ipr_is_same_device - Determine if two devices are the same.
1233  * @res:        resource entry struct
1234  * @cfgtew:     config table entry wrapper struct
1235  *
1236  * Return value:
1237  *      1 if the devices are the same / 0 otherwise
1238  **/
1239 static int ipr_is_same_device(struct ipr_resource_entry *res,
1240                               struct ipr_config_table_entry_wrapper *cfgtew)
1241 {
1242         if (res->ioa_cfg->sis64) {
1243                 if (!memcmp(&res->dev_id, &cfgtew->u.cfgte64->dev_id,
1244                                         sizeof(cfgtew->u.cfgte64->dev_id)) &&
1245                         !memcmp(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1246                                         sizeof(cfgtew->u.cfgte64->lun))) {
1247                         return 1;
1248                 }
1249         } else {
1250                 if (res->bus == cfgtew->u.cfgte->res_addr.bus &&
1251                     res->target == cfgtew->u.cfgte->res_addr.target &&
1252                     res->lun == cfgtew->u.cfgte->res_addr.lun)
1253                         return 1;
1254         }
1255 
1256         return 0;
1257 }
1258 
1259 /**
1260  * __ipr_format_res_path - Format the resource path for printing.
1261  * @res_path:   resource path
1262  * @buf:        buffer
1263  * @len:        length of buffer provided
1264  *
1265  * Return value:
1266  *      pointer to buffer
1267  **/
1268 static char *__ipr_format_res_path(u8 *res_path, char *buffer, int len)
1269 {
1270         int i;
1271         char *p = buffer;
1272 
1273         *p = '\0';
1274         p += snprintf(p, buffer + len - p, "%02X", res_path[0]);
1275         for (i = 1; res_path[i] != 0xff && ((i * 3) < len); i++)
1276                 p += snprintf(p, buffer + len - p, "-%02X", res_path[i]);
1277 
1278         return buffer;
1279 }
1280 
1281 /**
1282  * ipr_format_res_path - Format the resource path for printing.
1283  * @ioa_cfg:    ioa config struct
1284  * @res_path:   resource path
1285  * @buf:        buffer
1286  * @len:        length of buffer provided
1287  *
1288  * Return value:
1289  *      pointer to buffer
1290  **/
1291 static char *ipr_format_res_path(struct ipr_ioa_cfg *ioa_cfg,
1292                                  u8 *res_path, char *buffer, int len)
1293 {
1294         char *p = buffer;
1295 
1296         *p = '\0';
1297         p += snprintf(p, buffer + len - p, "%d/", ioa_cfg->host->host_no);
1298         __ipr_format_res_path(res_path, p, len - (buffer - p));
1299         return buffer;
1300 }
1301 
1302 /**
1303  * ipr_update_res_entry - Update the resource entry.
1304  * @res:        resource entry struct
1305  * @cfgtew:     config table entry wrapper struct
1306  *
1307  * Return value:
1308  *      none
1309  **/
1310 static void ipr_update_res_entry(struct ipr_resource_entry *res,
1311                                  struct ipr_config_table_entry_wrapper *cfgtew)
1312 {
1313         char buffer[IPR_MAX_RES_PATH_LENGTH];
1314         unsigned int proto;
1315         int new_path = 0;
1316 
1317         if (res->ioa_cfg->sis64) {
1318                 res->flags = be16_to_cpu(cfgtew->u.cfgte64->flags);
1319                 res->res_flags = be16_to_cpu(cfgtew->u.cfgte64->res_flags);
1320                 res->type = cfgtew->u.cfgte64->res_type;
1321 
1322                 memcpy(&res->std_inq_data, &cfgtew->u.cfgte64->std_inq_data,
1323                         sizeof(struct ipr_std_inq_data));
1324 
1325                 res->qmodel = IPR_QUEUEING_MODEL64(res);
1326                 proto = cfgtew->u.cfgte64->proto;
1327                 res->res_handle = cfgtew->u.cfgte64->res_handle;
1328                 res->dev_id = cfgtew->u.cfgte64->dev_id;
1329 
1330                 memcpy(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1331                         sizeof(res->dev_lun.scsi_lun));
1332 
1333                 if (memcmp(res->res_path, &cfgtew->u.cfgte64->res_path,
1334                                         sizeof(res->res_path))) {
1335                         memcpy(res->res_path, &cfgtew->u.cfgte64->res_path,
1336                                 sizeof(res->res_path));
1337                         new_path = 1;
1338                 }
1339 
1340                 if (res->sdev && new_path)
1341                         sdev_printk(KERN_INFO, res->sdev, "Resource path: %s\n",
1342                                     ipr_format_res_path(res->ioa_cfg,
1343                                         res->res_path, buffer, sizeof(buffer)));
1344         } else {
1345                 res->flags = cfgtew->u.cfgte->flags;
1346                 if (res->flags & IPR_IS_IOA_RESOURCE)
1347                         res->type = IPR_RES_TYPE_IOAFP;
1348                 else
1349                         res->type = cfgtew->u.cfgte->rsvd_subtype & 0x0f;
1350 
1351                 memcpy(&res->std_inq_data, &cfgtew->u.cfgte->std_inq_data,
1352                         sizeof(struct ipr_std_inq_data));
1353 
1354                 res->qmodel = IPR_QUEUEING_MODEL(res);
1355                 proto = cfgtew->u.cfgte->proto;
1356                 res->res_handle = cfgtew->u.cfgte->res_handle;
1357         }
1358 
1359         ipr_update_ata_class(res, proto);
1360 }
1361 
1362 /**
1363  * ipr_clear_res_target - Clear the bit in the bit map representing the target
1364  *                        for the resource.
1365  * @res:        resource entry struct
1366  * @cfgtew:     config table entry wrapper struct
1367  *
1368  * Return value:
1369  *      none
1370  **/
1371 static void ipr_clear_res_target(struct ipr_resource_entry *res)
1372 {
1373         struct ipr_resource_entry *gscsi_res = NULL;
1374         struct ipr_ioa_cfg *ioa_cfg = res->ioa_cfg;
1375 
1376         if (!ioa_cfg->sis64)
1377                 return;
1378 
1379         if (res->bus == IPR_ARRAY_VIRTUAL_BUS)
1380                 clear_bit(res->target, ioa_cfg->array_ids);
1381         else if (res->bus == IPR_VSET_VIRTUAL_BUS)
1382                 clear_bit(res->target, ioa_cfg->vset_ids);
1383         else if (res->bus == 0 && res->type == IPR_RES_TYPE_GENERIC_SCSI) {
1384                 list_for_each_entry(gscsi_res, &ioa_cfg->used_res_q, queue)
1385                         if (gscsi_res->dev_id == res->dev_id && gscsi_res != res)
1386                                 return;
1387                 clear_bit(res->target, ioa_cfg->target_ids);
1388 
1389         } else if (res->bus == 0)
1390                 clear_bit(res->target, ioa_cfg->target_ids);
1391 }
1392 
1393 /**
1394  * ipr_handle_config_change - Handle a config change from the adapter
1395  * @ioa_cfg:    ioa config struct
1396  * @hostrcb:    hostrcb
1397  *
1398  * Return value:
1399  *      none
1400  **/
1401 static void ipr_handle_config_change(struct ipr_ioa_cfg *ioa_cfg,
1402                                      struct ipr_hostrcb *hostrcb)
1403 {
1404         struct ipr_resource_entry *res = NULL;
1405         struct ipr_config_table_entry_wrapper cfgtew;
1406         __be32 cc_res_handle;
1407 
1408         u32 is_ndn = 1;
1409 
1410         if (ioa_cfg->sis64) {
1411                 cfgtew.u.cfgte64 = &hostrcb->hcam.u.ccn.u.cfgte64;
1412                 cc_res_handle = cfgtew.u.cfgte64->res_handle;
1413         } else {
1414                 cfgtew.u.cfgte = &hostrcb->hcam.u.ccn.u.cfgte;
1415                 cc_res_handle = cfgtew.u.cfgte->res_handle;
1416         }
1417 
1418         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
1419                 if (res->res_handle == cc_res_handle) {
1420                         is_ndn = 0;
1421                         break;
1422                 }
1423         }
1424 
1425         if (is_ndn) {
1426                 if (list_empty(&ioa_cfg->free_res_q)) {
1427                         ipr_send_hcam(ioa_cfg,
1428                                       IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE,
1429                                       hostrcb);
1430                         return;
1431                 }
1432 
1433                 res = list_entry(ioa_cfg->free_res_q.next,
1434                                  struct ipr_resource_entry, queue);
1435 
1436                 list_del(&res->queue);
1437                 ipr_init_res_entry(res, &cfgtew);
1438                 list_add_tail(&res->queue, &ioa_cfg->used_res_q);
1439         }
1440 
1441         ipr_update_res_entry(res, &cfgtew);
1442 
1443         if (hostrcb->hcam.notify_type == IPR_HOST_RCB_NOTIF_TYPE_REM_ENTRY) {
1444                 if (res->sdev) {
1445                         res->del_from_ml = 1;
1446                         res->res_handle = IPR_INVALID_RES_HANDLE;
1447                         schedule_work(&ioa_cfg->work_q);
1448                 } else {
1449                         ipr_clear_res_target(res);
1450                         list_move_tail(&res->queue, &ioa_cfg->free_res_q);
1451                 }
1452         } else if (!res->sdev || res->del_from_ml) {
1453                 res->add_to_ml = 1;
1454                 schedule_work(&ioa_cfg->work_q);
1455         }
1456 
1457         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
1458 }
1459 
1460 /**
1461  * ipr_process_ccn - Op done function for a CCN.
1462  * @ipr_cmd:    ipr command struct
1463  *
1464  * This function is the op done function for a configuration
1465  * change notification host controlled async from the adapter.
1466  *
1467  * Return value:
1468  *      none
1469  **/
1470 static void ipr_process_ccn(struct ipr_cmnd *ipr_cmd)
1471 {
1472         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
1473         struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
1474         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
1475 
1476         list_del(&hostrcb->queue);
1477         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
1478 
1479         if (ioasc) {
1480                 if (ioasc != IPR_IOASC_IOA_WAS_RESET &&
1481                     ioasc != IPR_IOASC_ABORTED_CMD_TERM_BY_HOST)
1482                         dev_err(&ioa_cfg->pdev->dev,
1483                                 "Host RCB failed with IOASC: 0x%08X\n", ioasc);
1484 
1485                 ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
1486         } else {
1487                 ipr_handle_config_change(ioa_cfg, hostrcb);
1488         }
1489 }
1490 
1491 /**
1492  * strip_and_pad_whitespace - Strip and pad trailing whitespace.
1493  * @i:          index into buffer
1494  * @buf:                string to modify
1495  *
1496  * This function will strip all trailing whitespace, pad the end
1497  * of the string with a single space, and NULL terminate the string.
1498  *
1499  * Return value:
1500  *      new length of string
1501  **/
1502 static int strip_and_pad_whitespace(int i, char *buf)
1503 {
1504         while (i && buf[i] == ' ')
1505                 i--;
1506         buf[i+1] = ' ';
1507         buf[i+2] = '\0';
1508         return i + 2;
1509 }
1510 
1511 /**
1512  * ipr_log_vpd_compact - Log the passed extended VPD compactly.
1513  * @prefix:             string to print at start of printk
1514  * @hostrcb:    hostrcb pointer
1515  * @vpd:                vendor/product id/sn struct
1516  *
1517  * Return value:
1518  *      none
1519  **/
1520 static void ipr_log_vpd_compact(char *prefix, struct ipr_hostrcb *hostrcb,
1521                                 struct ipr_vpd *vpd)
1522 {
1523         char buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN + IPR_SERIAL_NUM_LEN + 3];
1524         int i = 0;
1525 
1526         memcpy(buffer, vpd->vpids.vendor_id, IPR_VENDOR_ID_LEN);
1527         i = strip_and_pad_whitespace(IPR_VENDOR_ID_LEN - 1, buffer);
1528 
1529         memcpy(&buffer[i], vpd->vpids.product_id, IPR_PROD_ID_LEN);
1530         i = strip_and_pad_whitespace(i + IPR_PROD_ID_LEN - 1, buffer);
1531 
1532         memcpy(&buffer[i], vpd->sn, IPR_SERIAL_NUM_LEN);
1533         buffer[IPR_SERIAL_NUM_LEN + i] = '\0';
1534 
1535         ipr_hcam_err(hostrcb, "%s VPID/SN: %s\n", prefix, buffer);
1536 }
1537 
1538 /**
1539  * ipr_log_vpd - Log the passed VPD to the error log.
1540  * @vpd:                vendor/product id/sn struct
1541  *
1542  * Return value:
1543  *      none
1544  **/
1545 static void ipr_log_vpd(struct ipr_vpd *vpd)
1546 {
1547         char buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN
1548                     + IPR_SERIAL_NUM_LEN];
1549 
1550         memcpy(buffer, vpd->vpids.vendor_id, IPR_VENDOR_ID_LEN);
1551         memcpy(buffer + IPR_VENDOR_ID_LEN, vpd->vpids.product_id,
1552                IPR_PROD_ID_LEN);
1553         buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN] = '\0';
1554         ipr_err("Vendor/Product ID: %s\n", buffer);
1555 
1556         memcpy(buffer, vpd->sn, IPR_SERIAL_NUM_LEN);
1557         buffer[IPR_SERIAL_NUM_LEN] = '\0';
1558         ipr_err("    Serial Number: %s\n", buffer);
1559 }
1560 
1561 /**
1562  * ipr_log_ext_vpd_compact - Log the passed extended VPD compactly.
1563  * @prefix:             string to print at start of printk
1564  * @hostrcb:    hostrcb pointer
1565  * @vpd:                vendor/product id/sn/wwn struct
1566  *
1567  * Return value:
1568  *      none
1569  **/
1570 static void ipr_log_ext_vpd_compact(char *prefix, struct ipr_hostrcb *hostrcb,
1571                                     struct ipr_ext_vpd *vpd)
1572 {
1573         ipr_log_vpd_compact(prefix, hostrcb, &vpd->vpd);
1574         ipr_hcam_err(hostrcb, "%s WWN: %08X%08X\n", prefix,
1575                      be32_to_cpu(vpd->wwid[0]), be32_to_cpu(vpd->wwid[1]));
1576 }
1577 
1578 /**
1579  * ipr_log_ext_vpd - Log the passed extended VPD to the error log.
1580  * @vpd:                vendor/product id/sn/wwn struct
1581  *
1582  * Return value:
1583  *      none
1584  **/
1585 static void ipr_log_ext_vpd(struct ipr_ext_vpd *vpd)
1586 {
1587         ipr_log_vpd(&vpd->vpd);
1588         ipr_err("    WWN: %08X%08X\n", be32_to_cpu(vpd->wwid[0]),
1589                 be32_to_cpu(vpd->wwid[1]));
1590 }
1591 
1592 /**
1593  * ipr_log_enhanced_cache_error - Log a cache error.
1594  * @ioa_cfg:    ioa config struct
1595  * @hostrcb:    hostrcb struct
1596  *
1597  * Return value:
1598  *      none
1599  **/
1600 static void ipr_log_enhanced_cache_error(struct ipr_ioa_cfg *ioa_cfg,
1601                                          struct ipr_hostrcb *hostrcb)
1602 {
1603         struct ipr_hostrcb_type_12_error *error;
1604 
1605         if (ioa_cfg->sis64)
1606                 error = &hostrcb->hcam.u.error64.u.type_12_error;
1607         else
1608                 error = &hostrcb->hcam.u.error.u.type_12_error;
1609 
1610         ipr_err("-----Current Configuration-----\n");
1611         ipr_err("Cache Directory Card Information:\n");
1612         ipr_log_ext_vpd(&error->ioa_vpd);
1613         ipr_err("Adapter Card Information:\n");
1614         ipr_log_ext_vpd(&error->cfc_vpd);
1615 
1616         ipr_err("-----Expected Configuration-----\n");
1617         ipr_err("Cache Directory Card Information:\n");
1618         ipr_log_ext_vpd(&error->ioa_last_attached_to_cfc_vpd);
1619         ipr_err("Adapter Card Information:\n");
1620         ipr_log_ext_vpd(&error->cfc_last_attached_to_ioa_vpd);
1621 
1622         ipr_err("Additional IOA Data: %08X %08X %08X\n",
1623                      be32_to_cpu(error->ioa_data[0]),
1624                      be32_to_cpu(error->ioa_data[1]),
1625                      be32_to_cpu(error->ioa_data[2]));
1626 }
1627 
1628 /**
1629  * ipr_log_cache_error - Log a cache error.
1630  * @ioa_cfg:    ioa config struct
1631  * @hostrcb:    hostrcb struct
1632  *
1633  * Return value:
1634  *      none
1635  **/
1636 static void ipr_log_cache_error(struct ipr_ioa_cfg *ioa_cfg,
1637                                 struct ipr_hostrcb *hostrcb)
1638 {
1639         struct ipr_hostrcb_type_02_error *error =
1640                 &hostrcb->hcam.u.error.u.type_02_error;
1641 
1642         ipr_err("-----Current Configuration-----\n");
1643         ipr_err("Cache Directory Card Information:\n");
1644         ipr_log_vpd(&error->ioa_vpd);
1645         ipr_err("Adapter Card Information:\n");
1646         ipr_log_vpd(&error->cfc_vpd);
1647 
1648         ipr_err("-----Expected Configuration-----\n");
1649         ipr_err("Cache Directory Card Information:\n");
1650         ipr_log_vpd(&error->ioa_last_attached_to_cfc_vpd);
1651         ipr_err("Adapter Card Information:\n");
1652         ipr_log_vpd(&error->cfc_last_attached_to_ioa_vpd);
1653 
1654         ipr_err("Additional IOA Data: %08X %08X %08X\n",
1655                      be32_to_cpu(error->ioa_data[0]),
1656                      be32_to_cpu(error->ioa_data[1]),
1657                      be32_to_cpu(error->ioa_data[2]));
1658 }
1659 
1660 /**
1661  * ipr_log_enhanced_config_error - Log a configuration error.
1662  * @ioa_cfg:    ioa config struct
1663  * @hostrcb:    hostrcb struct
1664  *
1665  * Return value:
1666  *      none
1667  **/
1668 static void ipr_log_enhanced_config_error(struct ipr_ioa_cfg *ioa_cfg,
1669                                           struct ipr_hostrcb *hostrcb)
1670 {
1671         int errors_logged, i;
1672         struct ipr_hostrcb_device_data_entry_enhanced *dev_entry;
1673         struct ipr_hostrcb_type_13_error *error;
1674 
1675         error = &hostrcb->hcam.u.error.u.type_13_error;
1676         errors_logged = be32_to_cpu(error->errors_logged);
1677 
1678         ipr_err("Device Errors Detected/Logged: %d/%d\n",
1679                 be32_to_cpu(error->errors_detected), errors_logged);
1680 
1681         dev_entry = error->dev;
1682 
1683         for (i = 0; i < errors_logged; i++, dev_entry++) {
1684                 ipr_err_separator;
1685 
1686                 ipr_phys_res_err(ioa_cfg, dev_entry->dev_res_addr, "Device %d", i + 1);
1687                 ipr_log_ext_vpd(&dev_entry->vpd);
1688 
1689                 ipr_err("-----New Device Information-----\n");
1690                 ipr_log_ext_vpd(&dev_entry->new_vpd);
1691 
1692                 ipr_err("Cache Directory Card Information:\n");
1693                 ipr_log_ext_vpd(&dev_entry->ioa_last_with_dev_vpd);
1694 
1695                 ipr_err("Adapter Card Information:\n");
1696                 ipr_log_ext_vpd(&dev_entry->cfc_last_with_dev_vpd);
1697         }
1698 }
1699 
1700 /**
1701  * ipr_log_sis64_config_error - Log a device error.
1702  * @ioa_cfg:    ioa config struct
1703  * @hostrcb:    hostrcb struct
1704  *
1705  * Return value:
1706  *      none
1707  **/
1708 static void ipr_log_sis64_config_error(struct ipr_ioa_cfg *ioa_cfg,
1709                                        struct ipr_hostrcb *hostrcb)
1710 {
1711         int errors_logged, i;
1712         struct ipr_hostrcb64_device_data_entry_enhanced *dev_entry;
1713         struct ipr_hostrcb_type_23_error *error;
1714         char buffer[IPR_MAX_RES_PATH_LENGTH];
1715 
1716         error = &hostrcb->hcam.u.error64.u.type_23_error;
1717         errors_logged = be32_to_cpu(error->errors_logged);
1718 
1719         ipr_err("Device Errors Detected/Logged: %d/%d\n",
1720                 be32_to_cpu(error->errors_detected), errors_logged);
1721 
1722         dev_entry = error->dev;
1723 
1724         for (i = 0; i < errors_logged; i++, dev_entry++) {
1725                 ipr_err_separator;
1726 
1727                 ipr_err("Device %d : %s", i + 1,
1728                         __ipr_format_res_path(dev_entry->res_path,
1729                                               buffer, sizeof(buffer)));
1730                 ipr_log_ext_vpd(&dev_entry->vpd);
1731 
1732                 ipr_err("-----New Device Information-----\n");
1733                 ipr_log_ext_vpd(&dev_entry->new_vpd);
1734 
1735                 ipr_err("Cache Directory Card Information:\n");
1736                 ipr_log_ext_vpd(&dev_entry->ioa_last_with_dev_vpd);
1737 
1738                 ipr_err("Adapter Card Information:\n");
1739                 ipr_log_ext_vpd(&dev_entry->cfc_last_with_dev_vpd);
1740         }
1741 }
1742 
1743 /**
1744  * ipr_log_config_error - Log a configuration error.
1745  * @ioa_cfg:    ioa config struct
1746  * @hostrcb:    hostrcb struct
1747  *
1748  * Return value:
1749  *      none
1750  **/
1751 static void ipr_log_config_error(struct ipr_ioa_cfg *ioa_cfg,
1752                                  struct ipr_hostrcb *hostrcb)
1753 {
1754         int errors_logged, i;
1755         struct ipr_hostrcb_device_data_entry *dev_entry;
1756         struct ipr_hostrcb_type_03_error *error;
1757 
1758         error = &hostrcb->hcam.u.error.u.type_03_error;
1759         errors_logged = be32_to_cpu(error->errors_logged);
1760 
1761         ipr_err("Device Errors Detected/Logged: %d/%d\n",
1762                 be32_to_cpu(error->errors_detected), errors_logged);
1763 
1764         dev_entry = error->dev;
1765 
1766         for (i = 0; i < errors_logged; i++, dev_entry++) {
1767                 ipr_err_separator;
1768 
1769                 ipr_phys_res_err(ioa_cfg, dev_entry->dev_res_addr, "Device %d", i + 1);
1770                 ipr_log_vpd(&dev_entry->vpd);
1771 
1772                 ipr_err("-----New Device Information-----\n");
1773                 ipr_log_vpd(&dev_entry->new_vpd);
1774 
1775                 ipr_err("Cache Directory Card Information:\n");
1776                 ipr_log_vpd(&dev_entry->ioa_last_with_dev_vpd);
1777 
1778                 ipr_err("Adapter Card Information:\n");
1779                 ipr_log_vpd(&dev_entry->cfc_last_with_dev_vpd);
1780 
1781                 ipr_err("Additional IOA Data: %08X %08X %08X %08X %08X\n",
1782                         be32_to_cpu(dev_entry->ioa_data[0]),
1783                         be32_to_cpu(dev_entry->ioa_data[1]),
1784                         be32_to_cpu(dev_entry->ioa_data[2]),
1785                         be32_to_cpu(dev_entry->ioa_data[3]),
1786                         be32_to_cpu(dev_entry->ioa_data[4]));
1787         }
1788 }
1789 
1790 /**
1791  * ipr_log_enhanced_array_error - Log an array configuration error.
1792  * @ioa_cfg:    ioa config struct
1793  * @hostrcb:    hostrcb struct
1794  *
1795  * Return value:
1796  *      none
1797  **/
1798 static void ipr_log_enhanced_array_error(struct ipr_ioa_cfg *ioa_cfg,
1799                                          struct ipr_hostrcb *hostrcb)
1800 {
1801         int i, num_entries;
1802         struct ipr_hostrcb_type_14_error *error;
1803         struct ipr_hostrcb_array_data_entry_enhanced *array_entry;
1804         const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '' };
1805 
1806         error = &hostrcb->hcam.u.error.u.type_14_error;
1807 
1808         ipr_err_separator;
1809 
1810         ipr_err("RAID %s Array Configuration: %d:%d:%d:%d\n",
1811                 error->protection_level,
1812                 ioa_cfg->host->host_no,
1813                 error->last_func_vset_res_addr.bus,
1814                 error->last_func_vset_res_addr.target,
1815                 error->last_func_vset_res_addr.lun);
1816 
1817         ipr_err_separator;
1818 
1819         array_entry = error->array_member;
1820         num_entries = min_t(u32, be32_to_cpu(error->num_entries),
1821                             ARRAY_SIZE(error->array_member));
1822 
1823         for (i = 0; i < num_entries; i++, array_entry++) {
1824                 if (!memcmp(array_entry->vpd.vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
1825                         continue;
1826 
1827                 if (be32_to_cpu(error->exposed_mode_adn) == i)
1828                         ipr_err("Exposed Array Member %d:\n", i);
1829                 else
1830                         ipr_err("Array Member %d:\n", i);
1831 
1832                 ipr_log_ext_vpd(&array_entry->vpd);
1833                 ipr_phys_res_err(ioa_cfg, array_entry->dev_res_addr, "Current Location");
1834                 ipr_phys_res_err(ioa_cfg, array_entry->expected_dev_res_addr,
1835                                  "Expected Location");
1836 
1837                 ipr_err_separator;
1838         }
1839 }
1840 
1841 /**
1842  * ipr_log_array_error - Log an array configuration error.
1843  * @ioa_cfg:    ioa config struct
1844  * @hostrcb:    hostrcb struct
1845  *
1846  * Return value:
1847  *      none
1848  **/
1849 static void ipr_log_array_error(struct ipr_ioa_cfg *ioa_cfg,
1850                                 struct ipr_hostrcb *hostrcb)
1851 {
1852         int i;
1853         struct ipr_hostrcb_type_04_error *error;
1854         struct ipr_hostrcb_array_data_entry *array_entry;
1855         const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '' };
1856 
1857         error = &hostrcb->hcam.u.error.u.type_04_error;
1858 
1859         ipr_err_separator;
1860 
1861         ipr_err("RAID %s Array Configuration: %d:%d:%d:%d\n",
1862                 error->protection_level,
1863                 ioa_cfg->host->host_no,
1864                 error->last_func_vset_res_addr.bus,
1865                 error->last_func_vset_res_addr.target,
1866                 error->last_func_vset_res_addr.lun);
1867 
1868         ipr_err_separator;
1869 
1870         array_entry = error->array_member;
1871 
1872         for (i = 0; i < 18; i++) {
1873                 if (!memcmp(array_entry->vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
1874                         continue;
1875 
1876                 if (be32_to_cpu(error->exposed_mode_adn) == i)
1877                         ipr_err("Exposed Array Member %d:\n", i);
1878                 else
1879                         ipr_err("Array Member %d:\n", i);
1880 
1881                 ipr_log_vpd(&array_entry->vpd);
1882 
1883                 ipr_phys_res_err(ioa_cfg, array_entry->dev_res_addr, "Current Location");
1884                 ipr_phys_res_err(ioa_cfg, array_entry->expected_dev_res_addr,
1885                                  "Expected Location");
1886 
1887                 ipr_err_separator;
1888 
1889                 if (i == 9)
1890                         array_entry = error->array_member2;
1891                 else
1892                         array_entry++;
1893         }
1894 }
1895 
1896 /**
1897  * ipr_log_hex_data - Log additional hex IOA error data.
1898  * @ioa_cfg:    ioa config struct
1899  * @data:               IOA error data
1900  * @len:                data length
1901  *
1902  * Return value:
1903  *      none
1904  **/
1905 static void ipr_log_hex_data(struct ipr_ioa_cfg *ioa_cfg, __be32 *data, int len)
1906 {
1907         int i;
1908 
1909         if (len == 0)
1910                 return;
1911 
1912         if (ioa_cfg->log_level <= IPR_DEFAULT_LOG_LEVEL)
1913                 len = min_t(int, len, IPR_DEFAULT_MAX_ERROR_DUMP);
1914 
1915         for (i = 0; i < len / 4; i += 4) {
1916                 ipr_err("%08X: %08X %08X %08X %08X\n", i*4,
1917                         be32_to_cpu(data[i]),
1918                         be32_to_cpu(data[i+1]),
1919                         be32_to_cpu(data[i+2]),
1920                         be32_to_cpu(data[i+3]));
1921         }
1922 }
1923 
1924 /**
1925  * ipr_log_enhanced_dual_ioa_error - Log an enhanced dual adapter error.
1926  * @ioa_cfg:    ioa config struct
1927  * @hostrcb:    hostrcb struct
1928  *
1929  * Return value:
1930  *      none
1931  **/
1932 static void ipr_log_enhanced_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
1933                                             struct ipr_hostrcb *hostrcb)
1934 {
1935         struct ipr_hostrcb_type_17_error *error;
1936 
1937         if (ioa_cfg->sis64)
1938                 error = &hostrcb->hcam.u.error64.u.type_17_error;
1939         else
1940                 error = &hostrcb->hcam.u.error.u.type_17_error;
1941 
1942         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
1943         strim(error->failure_reason);
1944 
1945         ipr_hcam_err(hostrcb, "%s [PRC: %08X]\n", error->failure_reason,
1946                      be32_to_cpu(hostrcb->hcam.u.error.prc));
1947         ipr_log_ext_vpd_compact("Remote IOA", hostrcb, &error->vpd);
1948         ipr_log_hex_data(ioa_cfg, error->data,
1949                          be32_to_cpu(hostrcb->hcam.length) -
1950                          (offsetof(struct ipr_hostrcb_error, u) +
1951                           offsetof(struct ipr_hostrcb_type_17_error, data)));
1952 }
1953 
1954 /**
1955  * ipr_log_dual_ioa_error - Log a dual adapter error.
1956  * @ioa_cfg:    ioa config struct
1957  * @hostrcb:    hostrcb struct
1958  *
1959  * Return value:
1960  *      none
1961  **/
1962 static void ipr_log_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
1963                                    struct ipr_hostrcb *hostrcb)
1964 {
1965         struct ipr_hostrcb_type_07_error *error;
1966 
1967         error = &hostrcb->hcam.u.error.u.type_07_error;
1968         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
1969         strim(error->failure_reason);
1970 
1971         ipr_hcam_err(hostrcb, "%s [PRC: %08X]\n", error->failure_reason,
1972                      be32_to_cpu(hostrcb->hcam.u.error.prc));
1973         ipr_log_vpd_compact("Remote IOA", hostrcb, &error->vpd);
1974         ipr_log_hex_data(ioa_cfg, error->data,
1975                          be32_to_cpu(hostrcb->hcam.length) -
1976                          (offsetof(struct ipr_hostrcb_error, u) +
1977                           offsetof(struct ipr_hostrcb_type_07_error, data)));
1978 }
1979 
1980 static const struct {
1981         u8 active;
1982         char *desc;
1983 } path_active_desc[] = {
1984         { IPR_PATH_NO_INFO, "Path" },
1985         { IPR_PATH_ACTIVE, "Active path" },
1986         { IPR_PATH_NOT_ACTIVE, "Inactive path" }
1987 };
1988 
1989 static const struct {
1990         u8 state;
1991         char *desc;
1992 } path_state_desc[] = {
1993         { IPR_PATH_STATE_NO_INFO, "has no path state information available" },
1994         { IPR_PATH_HEALTHY, "is healthy" },
1995         { IPR_PATH_DEGRADED, "is degraded" },
1996         { IPR_PATH_FAILED, "is failed" }
1997 };
1998 
1999 /**
2000  * ipr_log_fabric_path - Log a fabric path error
2001  * @hostrcb:    hostrcb struct
2002  * @fabric:             fabric descriptor
2003  *
2004  * Return value:
2005  *      none
2006  **/
2007 static void ipr_log_fabric_path(struct ipr_hostrcb *hostrcb,
2008                                 struct ipr_hostrcb_fabric_desc *fabric)
2009 {
2010         int i, j;
2011         u8 path_state = fabric->path_state;
2012         u8 active = path_state & IPR_PATH_ACTIVE_MASK;
2013         u8 state = path_state & IPR_PATH_STATE_MASK;
2014 
2015         for (i = 0; i < ARRAY_SIZE(path_active_desc); i++) {
2016                 if (path_active_desc[i].active != active)
2017                         continue;
2018 
2019                 for (j = 0; j < ARRAY_SIZE(path_state_desc); j++) {
2020                         if (path_state_desc[j].state != state)
2021                                 continue;
2022 
2023                         if (fabric->cascaded_expander == 0xff && fabric->phy == 0xff) {
2024                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d\n",
2025                                              path_active_desc[i].desc, path_state_desc[j].desc,
2026                                              fabric->ioa_port);
2027                         } else if (fabric->cascaded_expander == 0xff) {
2028                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Phy=%d\n",
2029                                              path_active_desc[i].desc, path_state_desc[j].desc,
2030                                              fabric->ioa_port, fabric->phy);
2031                         } else if (fabric->phy == 0xff) {
2032                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d\n",
2033                                              path_active_desc[i].desc, path_state_desc[j].desc,
2034                                              fabric->ioa_port, fabric->cascaded_expander);
2035                         } else {
2036                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d, Phy=%d\n",
2037                                              path_active_desc[i].desc, path_state_desc[j].desc,
2038                                              fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
2039                         }
2040                         return;
2041                 }
2042         }
2043 
2044         ipr_err("Path state=%02X IOA Port=%d Cascade=%d Phy=%d\n", path_state,
2045                 fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
2046 }
2047 
2048 /**
2049  * ipr_log64_fabric_path - Log a fabric path error
2050  * @hostrcb:    hostrcb struct
2051  * @fabric:             fabric descriptor
2052  *
2053  * Return value:
2054  *      none
2055  **/
2056 static void ipr_log64_fabric_path(struct ipr_hostrcb *hostrcb,
2057                                   struct ipr_hostrcb64_fabric_desc *fabric)
2058 {
2059         int i, j;
2060         u8 path_state = fabric->path_state;
2061         u8 active = path_state & IPR_PATH_ACTIVE_MASK;
2062         u8 state = path_state & IPR_PATH_STATE_MASK;
2063         char buffer[IPR_MAX_RES_PATH_LENGTH];
2064 
2065         for (i = 0; i < ARRAY_SIZE(path_active_desc); i++) {
2066                 if (path_active_desc[i].active != active)
2067                         continue;
2068 
2069                 for (j = 0; j < ARRAY_SIZE(path_state_desc); j++) {
2070                         if (path_state_desc[j].state != state)
2071                                 continue;
2072 
2073                         ipr_hcam_err(hostrcb, "%s %s: Resource Path=%s\n",
2074                                      path_active_desc[i].desc, path_state_desc[j].desc,
2075                                      ipr_format_res_path(hostrcb->ioa_cfg,
2076                                                 fabric->res_path,
2077                                                 buffer, sizeof(buffer)));
2078                         return;
2079                 }
2080         }
2081 
2082         ipr_err("Path state=%02X Resource Path=%s\n", path_state,
2083                 ipr_format_res_path(hostrcb->ioa_cfg, fabric->res_path,
2084                                     buffer, sizeof(buffer)));
2085 }
2086 
2087 static const struct {
2088         u8 type;
2089         char *desc;
2090 } path_type_desc[] = {
2091         { IPR_PATH_CFG_IOA_PORT, "IOA port" },
2092         { IPR_PATH_CFG_EXP_PORT, "Expander port" },
2093         { IPR_PATH_CFG_DEVICE_PORT, "Device port" },
2094         { IPR_PATH_CFG_DEVICE_LUN, "Device LUN" }
2095 };
2096 
2097 static const struct {
2098         u8 status;
2099         char *desc;
2100 } path_status_desc[] = {
2101         { IPR_PATH_CFG_NO_PROB, "Functional" },
2102         { IPR_PATH_CFG_DEGRADED, "Degraded" },
2103         { IPR_PATH_CFG_FAILED, "Failed" },
2104         { IPR_PATH_CFG_SUSPECT, "Suspect" },
2105         { IPR_PATH_NOT_DETECTED, "Missing" },
2106         { IPR_PATH_INCORRECT_CONN, "Incorrectly connected" }
2107 };
2108 
2109 static const char *link_rate[] = {
2110         "unknown",
2111         "disabled",
2112         "phy reset problem",
2113         "spinup hold",
2114         "port selector",
2115         "unknown",
2116         "unknown",
2117         "unknown",
2118         "1.5Gbps",
2119         "3.0Gbps",
2120         "unknown",
2121         "unknown",
2122         "unknown",
2123         "unknown",
2124         "unknown",
2125         "unknown"
2126 };
2127 
2128 /**
2129  * ipr_log_path_elem - Log a fabric path element.
2130  * @hostrcb:    hostrcb struct
2131  * @cfg:                fabric path element struct
2132  *
2133  * Return value:
2134  *      none
2135  **/
2136 static void ipr_log_path_elem(struct ipr_hostrcb *hostrcb,
2137                               struct ipr_hostrcb_config_element *cfg)
2138 {
2139         int i, j;
2140         u8 type = cfg->type_status & IPR_PATH_CFG_TYPE_MASK;
2141         u8 status = cfg->type_status & IPR_PATH_CFG_STATUS_MASK;
2142 
2143         if (type == IPR_PATH_CFG_NOT_EXIST)
2144                 return;
2145 
2146         for (i = 0; i < ARRAY_SIZE(path_type_desc); i++) {
2147                 if (path_type_desc[i].type != type)
2148                         continue;
2149 
2150                 for (j = 0; j < ARRAY_SIZE(path_status_desc); j++) {
2151                         if (path_status_desc[j].status != status)
2152                                 continue;
2153 
2154                         if (type == IPR_PATH_CFG_IOA_PORT) {
2155                                 ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, WWN=%08X%08X\n",
2156                                              path_status_desc[j].desc, path_type_desc[i].desc,
2157                                              cfg->phy, link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2158                                              be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2159                         } else {
2160                                 if (cfg->cascaded_expander == 0xff && cfg->phy == 0xff) {
2161                                         ipr_hcam_err(hostrcb, "%s %s: Link rate=%s, WWN=%08X%08X\n",
2162                                                      path_status_desc[j].desc, path_type_desc[i].desc,
2163                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2164                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2165                                 } else if (cfg->cascaded_expander == 0xff) {
2166                                         ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, "
2167                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
2168                                                      path_type_desc[i].desc, cfg->phy,
2169                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2170                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2171                                 } else if (cfg->phy == 0xff) {
2172                                         ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Link rate=%s, "
2173                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
2174                                                      path_type_desc[i].desc, cfg->cascaded_expander,
2175                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2176                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2177                                 } else {
2178                                         ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Phy=%d, Link rate=%s "
2179                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
2180                                                      path_type_desc[i].desc, cfg->cascaded_expander, cfg->phy,
2181                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2182                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2183                                 }
2184                         }
2185                         return;
2186                 }
2187         }
2188 
2189         ipr_hcam_err(hostrcb, "Path element=%02X: Cascade=%d Phy=%d Link rate=%s "
2190                      "WWN=%08X%08X\n", cfg->type_status, cfg->cascaded_expander, cfg->phy,
2191                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2192                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2193 }
2194 
2195 /**
2196  * ipr_log64_path_elem - Log a fabric path element.
2197  * @hostrcb:    hostrcb struct
2198  * @cfg:                fabric path element struct
2199  *
2200  * Return value:
2201  *      none
2202  **/
2203 static void ipr_log64_path_elem(struct ipr_hostrcb *hostrcb,
2204                                 struct ipr_hostrcb64_config_element *cfg)
2205 {
2206         int i, j;
2207         u8 desc_id = cfg->descriptor_id & IPR_DESCRIPTOR_MASK;
2208         u8 type = cfg->type_status & IPR_PATH_CFG_TYPE_MASK;
2209         u8 status = cfg->type_status & IPR_PATH_CFG_STATUS_MASK;
2210         char buffer[IPR_MAX_RES_PATH_LENGTH];
2211 
2212         if (type == IPR_PATH_CFG_NOT_EXIST || desc_id != IPR_DESCRIPTOR_SIS64)
2213                 return;
2214 
2215         for (i = 0; i < ARRAY_SIZE(path_type_desc); i++) {
2216                 if (path_type_desc[i].type != type)
2217                         continue;
2218 
2219                 for (j = 0; j < ARRAY_SIZE(path_status_desc); j++) {
2220                         if (path_status_desc[j].status != status)
2221                                 continue;
2222 
2223                         ipr_hcam_err(hostrcb, "%s %s: Resource Path=%s, Link rate=%s, WWN=%08X%08X\n",
2224                                      path_status_desc[j].desc, path_type_desc[i].desc,
2225                                      ipr_format_res_path(hostrcb->ioa_cfg,
2226                                         cfg->res_path, buffer, sizeof(buffer)),
2227                                         link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2228                                         be32_to_cpu(cfg->wwid[0]),
2229                                         be32_to_cpu(cfg->wwid[1]));
2230                         return;
2231                 }
2232         }
2233         ipr_hcam_err(hostrcb, "Path element=%02X: Resource Path=%s, Link rate=%s "
2234                      "WWN=%08X%08X\n", cfg->type_status,
2235                      ipr_format_res_path(hostrcb->ioa_cfg,
2236                         cfg->res_path, buffer, sizeof(buffer)),
2237                         link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2238                         be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2239 }
2240 
2241 /**
2242  * ipr_log_fabric_error - Log a fabric error.
2243  * @ioa_cfg:    ioa config struct
2244  * @hostrcb:    hostrcb struct
2245  *
2246  * Return value:
2247  *      none
2248  **/
2249 static void ipr_log_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
2250                                  struct ipr_hostrcb *hostrcb)
2251 {
2252         struct ipr_hostrcb_type_20_error *error;
2253         struct ipr_hostrcb_fabric_desc *fabric;
2254         struct ipr_hostrcb_config_element *cfg;
2255         int i, add_len;
2256 
2257         error = &hostrcb->hcam.u.error.u.type_20_error;
2258         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
2259         ipr_hcam_err(hostrcb, "%s\n", error->failure_reason);
2260 
2261         add_len = be32_to_cpu(hostrcb->hcam.length) -
2262                 (offsetof(struct ipr_hostrcb_error, u) +
2263                  offsetof(struct ipr_hostrcb_type_20_error, desc));
2264 
2265         for (i = 0, fabric = error->desc; i < error->num_entries; i++) {
2266                 ipr_log_fabric_path(hostrcb, fabric);
2267                 for_each_fabric_cfg(fabric, cfg)
2268                         ipr_log_path_elem(hostrcb, cfg);
2269 
2270                 add_len -= be16_to_cpu(fabric->length);
2271                 fabric = (struct ipr_hostrcb_fabric_desc *)
2272                         ((unsigned long)fabric + be16_to_cpu(fabric->length));
2273         }
2274 
2275         ipr_log_hex_data(ioa_cfg, (__be32 *)fabric, add_len);
2276 }
2277 
2278 /**
2279  * ipr_log_sis64_array_error - Log a sis64 array error.
2280  * @ioa_cfg:    ioa config struct
2281  * @hostrcb:    hostrcb struct
2282  *
2283  * Return value:
2284  *      none
2285  **/
2286 static void ipr_log_sis64_array_error(struct ipr_ioa_cfg *ioa_cfg,
2287                                       struct ipr_hostrcb *hostrcb)
2288 {
2289         int i, num_entries;
2290         struct ipr_hostrcb_type_24_error *error;
2291         struct ipr_hostrcb64_array_data_entry *array_entry;
2292         char buffer[IPR_MAX_RES_PATH_LENGTH];
2293         const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '' };
2294 
2295         error = &hostrcb->hcam.u.error64.u.type_24_error;
2296 
2297         ipr_err_separator;
2298 
2299         ipr_err("RAID %s Array Configuration: %s\n",
2300                 error->protection_level,
2301                 ipr_format_res_path(ioa_cfg, error->last_res_path,
2302                         buffer, sizeof(buffer)));
2303 
2304         ipr_err_separator;
2305 
2306         array_entry = error->array_member;
2307         num_entries = min_t(u32, error->num_entries,
2308                             ARRAY_SIZE(error->array_member));
2309 
2310         for (i = 0; i < num_entries; i++, array_entry++) {
2311 
2312                 if (!memcmp(array_entry->vpd.vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
2313                         continue;
2314 
2315                 if (error->exposed_mode_adn == i)
2316                         ipr_err("Exposed Array Member %d:\n", i);
2317                 else
2318                         ipr_err("Array Member %d:\n", i);
2319 
2320                 ipr_err("Array Member %d:\n", i);
2321                 ipr_log_ext_vpd(&array_entry->vpd);
2322                 ipr_err("Current Location: %s\n",
2323                          ipr_format_res_path(ioa_cfg, array_entry->res_path,
2324                                 buffer, sizeof(buffer)));
2325                 ipr_err("Expected Location: %s\n",
2326                          ipr_format_res_path(ioa_cfg,
2327                                 array_entry->expected_res_path,
2328                                 buffer, sizeof(buffer)));
2329 
2330                 ipr_err_separator;
2331         }
2332 }
2333 
2334 /**
2335  * ipr_log_sis64_fabric_error - Log a sis64 fabric error.
2336  * @ioa_cfg:    ioa config struct
2337  * @hostrcb:    hostrcb struct
2338  *
2339  * Return value:
2340  *      none
2341  **/
2342 static void ipr_log_sis64_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
2343                                        struct ipr_hostrcb *hostrcb)
2344 {
2345         struct ipr_hostrcb_type_30_error *error;
2346         struct ipr_hostrcb64_fabric_desc *fabric;
2347         struct ipr_hostrcb64_config_element *cfg;
2348         int i, add_len;
2349 
2350         error = &hostrcb->hcam.u.error64.u.type_30_error;
2351 
2352         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
2353         ipr_hcam_err(hostrcb, "%s\n", error->failure_reason);
2354 
2355         add_len = be32_to_cpu(hostrcb->hcam.length) -
2356                 (offsetof(struct ipr_hostrcb64_error, u) +
2357                  offsetof(struct ipr_hostrcb_type_30_error, desc));
2358 
2359         for (i = 0, fabric = error->desc; i < error->num_entries; i++) {
2360                 ipr_log64_fabric_path(hostrcb, fabric);
2361                 for_each_fabric_cfg(fabric, cfg)
2362                         ipr_log64_path_elem(hostrcb, cfg);
2363 
2364                 add_len -= be16_to_cpu(fabric->length);
2365                 fabric = (struct ipr_hostrcb64_fabric_desc *)
2366                         ((unsigned long)fabric + be16_to_cpu(fabric->length));
2367         }
2368 
2369         ipr_log_hex_data(ioa_cfg, (__be32 *)fabric, add_len);
2370 }
2371 
2372 /**
2373  * ipr_log_generic_error - Log an adapter error.
2374  * @ioa_cfg:    ioa config struct
2375  * @hostrcb:    hostrcb struct
2376  *
2377  * Return value:
2378  *      none
2379  **/
2380 static void ipr_log_generic_error(struct ipr_ioa_cfg *ioa_cfg,
2381                                   struct ipr_hostrcb *hostrcb)
2382 {
2383         ipr_log_hex_data(ioa_cfg, hostrcb->hcam.u.raw.data,
2384                          be32_to_cpu(hostrcb->hcam.length));
2385 }
2386 
2387 /**
2388  * ipr_log_sis64_device_error - Log a cache error.
2389  * @ioa_cfg:    ioa config struct
2390  * @hostrcb:    hostrcb struct
2391  *
2392  * Return value:
2393  *      none
2394  **/
2395 static void ipr_log_sis64_device_error(struct ipr_ioa_cfg *ioa_cfg,
2396                                          struct ipr_hostrcb *hostrcb)
2397 {
2398         struct ipr_hostrcb_type_21_error *error;
2399         char buffer[IPR_MAX_RES_PATH_LENGTH];
2400 
2401         error = &hostrcb->hcam.u.error64.u.type_21_error;
2402 
2403         ipr_err("-----Failing Device Information-----\n");
2404         ipr_err("World Wide Unique ID: %08X%08X%08X%08X\n",
2405                 be32_to_cpu(error->wwn[0]), be32_to_cpu(error->wwn[1]),
2406                  be32_to_cpu(error->wwn[2]), be32_to_cpu(error->wwn[3]));
2407         ipr_err("Device Resource Path: %s\n",
2408                 __ipr_format_res_path(error->res_path,
2409                                       buffer, sizeof(buffer)));
2410         error->primary_problem_desc[sizeof(error->primary_problem_desc) - 1] = '\0';
2411         error->second_problem_desc[sizeof(error->second_problem_desc) - 1] = '\0';
2412         ipr_err("Primary Problem Description: %s\n", error->primary_problem_desc);
2413         ipr_err("Secondary Problem Description:  %s\n", error->second_problem_desc);
2414         ipr_err("SCSI Sense Data:\n");
2415         ipr_log_hex_data(ioa_cfg, error->sense_data, sizeof(error->sense_data));
2416         ipr_err("SCSI Command Descriptor Block: \n");
2417         ipr_log_hex_data(ioa_cfg, error->cdb, sizeof(error->cdb));
2418 
2419         ipr_err("Additional IOA Data:\n");
2420         ipr_log_hex_data(ioa_cfg, error->ioa_data, be32_to_cpu(error->length_of_error));
2421 }
2422 
2423 /**
2424  * ipr_get_error - Find the specfied IOASC in the ipr_error_table.
2425  * @ioasc:      IOASC
2426  *
2427  * This function will return the index of into the ipr_error_table
2428  * for the specified IOASC. If the IOASC is not in the table,
2429  * 0 will be returned, which points to the entry used for unknown errors.
2430  *
2431  * Return value:
2432  *      index into the ipr_error_table
2433  **/
2434 static u32 ipr_get_error(u32 ioasc)
2435 {
2436         int i;
2437 
2438         for (i = 0; i < ARRAY_SIZE(ipr_error_table); i++)
2439                 if (ipr_error_table[i].ioasc == (ioasc & IPR_IOASC_IOASC_MASK))
2440                         return i;
2441 
2442         return 0;
2443 }
2444 
2445 /**
2446  * ipr_handle_log_data - Log an adapter error.
2447  * @ioa_cfg:    ioa config struct
2448  * @hostrcb:    hostrcb struct
2449  *
2450  * This function logs an adapter error to the system.
2451  *
2452  * Return value:
2453  *      none
2454  **/
2455 static void ipr_handle_log_data(struct ipr_ioa_cfg *ioa_cfg,
2456                                 struct ipr_hostrcb *hostrcb)
2457 {
2458         u32 ioasc;
2459         int error_index;
2460         struct ipr_hostrcb_type_21_error *error;
2461 
2462         if (hostrcb->hcam.notify_type != IPR_HOST_RCB_NOTIF_TYPE_ERROR_LOG_ENTRY)
2463                 return;
2464 
2465         if (hostrcb->hcam.notifications_lost == IPR_HOST_RCB_NOTIFICATIONS_LOST)
2466                 dev_err(&ioa_cfg->pdev->dev, "Error notifications lost\n");
2467 
2468         if (ioa_cfg->sis64)
2469                 ioasc = be32_to_cpu(hostrcb->hcam.u.error64.fd_ioasc);
2470         else
2471                 ioasc = be32_to_cpu(hostrcb->hcam.u.error.fd_ioasc);
2472 
2473         if (!ioa_cfg->sis64 && (ioasc == IPR_IOASC_BUS_WAS_RESET ||
2474             ioasc == IPR_IOASC_BUS_WAS_RESET_BY_OTHER)) {
2475                 /* Tell the midlayer we had a bus reset so it will handle the UA properly */
2476                 scsi_report_bus_reset(ioa_cfg->host,
2477                                       hostrcb->hcam.u.error.fd_res_addr.bus);
2478         }
2479 
2480         error_index = ipr_get_error(ioasc);
2481 
2482         if (!ipr_error_table[error_index].log_hcam)
2483                 return;
2484 
2485         if (ioasc == IPR_IOASC_HW_CMD_FAILED &&
2486             hostrcb->hcam.overlay_id == IPR_HOST_RCB_OVERLAY_ID_21) {
2487                 error = &hostrcb->hcam.u.error64.u.type_21_error;
2488 
2489                 if (((be32_to_cpu(error->sense_data[0]) & 0x0000ff00) >> 8) == ILLEGAL_REQUEST &&
2490                         ioa_cfg->log_level <= IPR_DEFAULT_LOG_LEVEL)
2491                                 return;
2492         }
2493 
2494         ipr_hcam_err(hostrcb, "%s\n", ipr_error_table[error_index].error);
2495 
2496         /* Set indication we have logged an error */
2497         ioa_cfg->errors_logged++;
2498 
2499         if (ioa_cfg->log_level < ipr_error_table[error_index].log_hcam)
2500                 return;
2501         if (be32_to_cpu(hostrcb->hcam.length) > sizeof(hostrcb->hcam.u.raw))
2502                 hostrcb->hcam.length = cpu_to_be32(sizeof(hostrcb->hcam.u.raw));
2503 
2504         switch (hostrcb->hcam.overlay_id) {
2505         case IPR_HOST_RCB_OVERLAY_ID_2:
2506                 ipr_log_cache_error(ioa_cfg, hostrcb);
2507                 break;
2508         case IPR_HOST_RCB_OVERLAY_ID_3:
2509                 ipr_log_config_error(ioa_cfg, hostrcb);
2510                 break;
2511         case IPR_HOST_RCB_OVERLAY_ID_4:
2512         case IPR_HOST_RCB_OVERLAY_ID_6:
2513                 ipr_log_array_error(ioa_cfg, hostrcb);
2514                 break;
2515         case IPR_HOST_RCB_OVERLAY_ID_7:
2516                 ipr_log_dual_ioa_error(ioa_cfg, hostrcb);
2517                 break;
2518         case IPR_HOST_RCB_OVERLAY_ID_12:
2519                 ipr_log_enhanced_cache_error(ioa_cfg, hostrcb);
2520                 break;
2521         case IPR_HOST_RCB_OVERLAY_ID_13:
2522                 ipr_log_enhanced_config_error(ioa_cfg, hostrcb);
2523                 break;
2524         case IPR_HOST_RCB_OVERLAY_ID_14:
2525         case IPR_HOST_RCB_OVERLAY_ID_16:
2526                 ipr_log_enhanced_array_error(ioa_cfg, hostrcb);
2527                 break;
2528         case IPR_HOST_RCB_OVERLAY_ID_17:
2529                 ipr_log_enhanced_dual_ioa_error(ioa_cfg, hostrcb);
2530                 break;
2531         case IPR_HOST_RCB_OVERLAY_ID_20:
2532                 ipr_log_fabric_error(ioa_cfg, hostrcb);
2533                 break;
2534         case IPR_HOST_RCB_OVERLAY_ID_21:
2535                 ipr_log_sis64_device_error(ioa_cfg, hostrcb);
2536                 break;
2537         case IPR_HOST_RCB_OVERLAY_ID_23:
2538                 ipr_log_sis64_config_error(ioa_cfg, hostrcb);
2539                 break;
2540         case IPR_HOST_RCB_OVERLAY_ID_24:
2541         case IPR_HOST_RCB_OVERLAY_ID_26:
2542                 ipr_log_sis64_array_error(ioa_cfg, hostrcb);
2543                 break;
2544         case IPR_HOST_RCB_OVERLAY_ID_30:
2545                 ipr_log_sis64_fabric_error(ioa_cfg, hostrcb);
2546                 break;
2547         case IPR_HOST_RCB_OVERLAY_ID_1:
2548         case IPR_HOST_RCB_OVERLAY_ID_DEFAULT:
2549         default:
2550                 ipr_log_generic_error(ioa_cfg, hostrcb);
2551                 break;
2552         }
2553 }
2554 
2555 /**
2556  * ipr_process_error - Op done function for an adapter error log.
2557  * @ipr_cmd:    ipr command struct
2558  *
2559  * This function is the op done function for an error log host
2560  * controlled async from the adapter. It will log the error and
2561  * send the HCAM back to the adapter.
2562  *
2563  * Return value:
2564  *      none
2565  **/
2566 static void ipr_process_error(struct ipr_cmnd *ipr_cmd)
2567 {
2568         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2569         struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
2570         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
2571         u32 fd_ioasc;
2572 
2573         if (ioa_cfg->sis64)
2574                 fd_ioasc = be32_to_cpu(hostrcb->hcam.u.error64.fd_ioasc);
2575         else
2576                 fd_ioasc = be32_to_cpu(hostrcb->hcam.u.error.fd_ioasc);
2577 
2578         list_del(&hostrcb->queue);
2579         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
2580 
2581         if (!ioasc) {
2582                 ipr_handle_log_data(ioa_cfg, hostrcb);
2583                 if (fd_ioasc == IPR_IOASC_NR_IOA_RESET_REQUIRED)
2584                         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_ABBREV);
2585         } else if (ioasc != IPR_IOASC_IOA_WAS_RESET &&
2586                    ioasc != IPR_IOASC_ABORTED_CMD_TERM_BY_HOST) {
2587                 dev_err(&ioa_cfg->pdev->dev,
2588                         "Host RCB failed with IOASC: 0x%08X\n", ioasc);
2589         }
2590 
2591         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
2592 }
2593 
2594 /**
2595  * ipr_timeout -  An internally generated op has timed out.
2596  * @ipr_cmd:    ipr command struct
2597  *
2598  * This function blocks host requests and initiates an
2599  * adapter reset.
2600  *
2601  * Return value:
2602  *      none
2603  **/
2604 static void ipr_timeout(struct ipr_cmnd *ipr_cmd)
2605 {
2606         unsigned long lock_flags = 0;
2607         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2608 
2609         ENTER;
2610         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2611 
2612         ioa_cfg->errors_logged++;
2613         dev_err(&ioa_cfg->pdev->dev,
2614                 "Adapter being reset due to command timeout.\n");
2615 
2616         if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
2617                 ioa_cfg->sdt_state = GET_DUMP;
2618 
2619         if (!ioa_cfg->in_reset_reload || ioa_cfg->reset_cmd == ipr_cmd)
2620                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
2621 
2622         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2623         LEAVE;
2624 }
2625 
2626 /**
2627  * ipr_oper_timeout -  Adapter timed out transitioning to operational
2628  * @ipr_cmd:    ipr command struct
2629  *
2630  * This function blocks host requests and initiates an
2631  * adapter reset.
2632  *
2633  * Return value:
2634  *      none
2635  **/
2636 static void ipr_oper_timeout(struct ipr_cmnd *ipr_cmd)
2637 {
2638         unsigned long lock_flags = 0;
2639         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2640 
2641         ENTER;
2642         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2643 
2644         ioa_cfg->errors_logged++;
2645         dev_err(&ioa_cfg->pdev->dev,
2646                 "Adapter timed out transitioning to operational.\n");
2647 
2648         if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
2649                 ioa_cfg->sdt_state = GET_DUMP;
2650 
2651         if (!ioa_cfg->in_reset_reload || ioa_cfg->reset_cmd == ipr_cmd) {
2652                 if (ipr_fastfail)
2653                         ioa_cfg->reset_retries += IPR_NUM_RESET_RELOAD_RETRIES;
2654                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
2655         }
2656 
2657         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2658         LEAVE;
2659 }
2660 
2661 /**
2662  * ipr_find_ses_entry - Find matching SES in SES table
2663  * @res:        resource entry struct of SES
2664  *
2665  * Return value:
2666  *      pointer to SES table entry / NULL on failure
2667  **/
2668 static const struct ipr_ses_table_entry *
2669 ipr_find_ses_entry(struct ipr_resource_entry *res)
2670 {
2671         int i, j, matches;
2672         struct ipr_std_inq_vpids *vpids;
2673         const struct ipr_ses_table_entry *ste = ipr_ses_table;
2674 
2675         for (i = 0; i < ARRAY_SIZE(ipr_ses_table); i++, ste++) {
2676                 for (j = 0, matches = 0; j < IPR_PROD_ID_LEN; j++) {
2677                         if (ste->compare_product_id_byte[j] == 'X') {
2678                                 vpids = &res->std_inq_data.vpids;
2679                                 if (vpids->product_id[j] == ste->product_id[j])
2680                                         matches++;
2681                                 else
2682                                         break;
2683                         } else
2684                                 matches++;
2685                 }
2686 
2687                 if (matches == IPR_PROD_ID_LEN)
2688                         return ste;
2689         }
2690 
2691         return NULL;
2692 }
2693 
2694 /**
2695  * ipr_get_max_scsi_speed - Determine max SCSI speed for a given bus
2696  * @ioa_cfg:    ioa config struct
2697  * @bus:                SCSI bus
2698  * @bus_width:  bus width
2699  *
2700  * Return value:
2701  *      SCSI bus speed in units of 100KHz, 1600 is 160 MHz
2702  *      For a 2-byte wide SCSI bus, the maximum transfer speed is
2703  *      twice the maximum transfer rate (e.g. for a wide enabled bus,
2704  *      max 160MHz = max 320MB/sec).
2705  **/
2706 static u32 ipr_get_max_scsi_speed(struct ipr_ioa_cfg *ioa_cfg, u8 bus, u8 bus_width)
2707 {
2708         struct ipr_resource_entry *res;
2709         const struct ipr_ses_table_entry *ste;
2710         u32 max_xfer_rate = IPR_MAX_SCSI_RATE(bus_width);
2711 
2712         /* Loop through each config table entry in the config table buffer */
2713         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
2714                 if (!(IPR_IS_SES_DEVICE(res->std_inq_data)))
2715                         continue;
2716 
2717                 if (bus != res->bus)
2718                         continue;
2719 
2720                 if (!(ste = ipr_find_ses_entry(res)))
2721                         continue;
2722 
2723                 max_xfer_rate = (ste->max_bus_speed_limit * 10) / (bus_width / 8);
2724         }
2725 
2726         return max_xfer_rate;
2727 }
2728 
2729 /**
2730  * ipr_wait_iodbg_ack - Wait for an IODEBUG ACK from the IOA
2731  * @ioa_cfg:            ioa config struct
2732  * @max_delay:          max delay in micro-seconds to wait
2733  *
2734  * Waits for an IODEBUG ACK from the IOA, doing busy looping.
2735  *
2736  * Return value:
2737  *      0 on success / other on failure
2738  **/
2739 static int ipr_wait_iodbg_ack(struct ipr_ioa_cfg *ioa_cfg, int max_delay)
2740 {
2741         volatile u32 pcii_reg;
2742         int delay = 1;
2743 
2744         /* Read interrupt reg until IOA signals IO Debug Acknowledge */
2745         while (delay < max_delay) {
2746                 pcii_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
2747 
2748                 if (pcii_reg & IPR_PCII_IO_DEBUG_ACKNOWLEDGE)
2749                         return 0;
2750 
2751                 /* udelay cannot be used if delay is more than a few milliseconds */
2752                 if ((delay / 1000) > MAX_UDELAY_MS)
2753                         mdelay(delay / 1000);
2754                 else
2755                         udelay(delay);
2756 
2757                 delay += delay;
2758         }
2759         return -EIO;
2760 }
2761 
2762 /**
2763  * ipr_get_sis64_dump_data_section - Dump IOA memory
2764  * @ioa_cfg:                    ioa config struct
2765  * @start_addr:                 adapter address to dump
2766  * @dest:                       destination kernel buffer
2767  * @length_in_words:            length to dump in 4 byte words
2768  *
2769  * Return value:
2770  *      0 on success
2771  **/
2772 static int ipr_get_sis64_dump_data_section(struct ipr_ioa_cfg *ioa_cfg,
2773                                            u32 start_addr,
2774                                            __be32 *dest, u32 length_in_words)
2775 {
2776         int i;
2777 
2778         for (i = 0; i < length_in_words; i++) {
2779                 writel(start_addr+(i*4), ioa_cfg->regs.dump_addr_reg);
2780                 *dest = cpu_to_be32(readl(ioa_cfg->regs.dump_data_reg));
2781                 dest++;
2782         }
2783 
2784         return 0;
2785 }
2786 
2787 /**
2788  * ipr_get_ldump_data_section - Dump IOA memory
2789  * @ioa_cfg:                    ioa config struct
2790  * @start_addr:                 adapter address to dump
2791  * @dest:                               destination kernel buffer
2792  * @length_in_words:    length to dump in 4 byte words
2793  *
2794  * Return value:
2795  *      0 on success / -EIO on failure
2796  **/
2797 static int ipr_get_ldump_data_section(struct ipr_ioa_cfg *ioa_cfg,
2798                                       u32 start_addr,
2799                                       __be32 *dest, u32 length_in_words)
2800 {
2801         volatile u32 temp_pcii_reg;
2802         int i, delay = 0;
2803 
2804         if (ioa_cfg->sis64)
2805                 return ipr_get_sis64_dump_data_section(ioa_cfg, start_addr,
2806                                                        dest, length_in_words);
2807 
2808         /* Write IOA interrupt reg starting LDUMP state  */
2809         writel((IPR_UPROCI_RESET_ALERT | IPR_UPROCI_IO_DEBUG_ALERT),
2810                ioa_cfg->regs.set_uproc_interrupt_reg32);
2811 
2812         /* Wait for IO debug acknowledge */
2813         if (ipr_wait_iodbg_ack(ioa_cfg,
2814                                IPR_LDUMP_MAX_LONG_ACK_DELAY_IN_USEC)) {
2815                 dev_err(&ioa_cfg->pdev->dev,
2816                         "IOA dump long data transfer timeout\n");
2817                 return -EIO;
2818         }
2819 
2820         /* Signal LDUMP interlocked - clear IO debug ack */
2821         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2822                ioa_cfg->regs.clr_interrupt_reg);
2823 
2824         /* Write Mailbox with starting address */
2825         writel(start_addr, ioa_cfg->ioa_mailbox);
2826 
2827         /* Signal address valid - clear IOA Reset alert */
2828         writel(IPR_UPROCI_RESET_ALERT,
2829                ioa_cfg->regs.clr_uproc_interrupt_reg32);
2830 
2831         for (i = 0; i < length_in_words; i++) {
2832                 /* Wait for IO debug acknowledge */
2833                 if (ipr_wait_iodbg_ack(ioa_cfg,
2834                                        IPR_LDUMP_MAX_SHORT_ACK_DELAY_IN_USEC)) {
2835                         dev_err(&ioa_cfg->pdev->dev,
2836                                 "IOA dump short data transfer timeout\n");
2837                         return -EIO;
2838                 }
2839 
2840                 /* Read data from mailbox and increment destination pointer */
2841                 *dest = cpu_to_be32(readl(ioa_cfg->ioa_mailbox));
2842                 dest++;
2843 
2844                 /* For all but the last word of data, signal data received */
2845                 if (i < (length_in_words - 1)) {
2846                         /* Signal dump data received - Clear IO debug Ack */
2847                         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2848                                ioa_cfg->regs.clr_interrupt_reg);
2849                 }
2850         }
2851 
2852         /* Signal end of block transfer. Set reset alert then clear IO debug ack */
2853         writel(IPR_UPROCI_RESET_ALERT,
2854                ioa_cfg->regs.set_uproc_interrupt_reg32);
2855 
2856         writel(IPR_UPROCI_IO_DEBUG_ALERT,
2857                ioa_cfg->regs.clr_uproc_interrupt_reg32);
2858 
2859         /* Signal dump data received - Clear IO debug Ack */
2860         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2861                ioa_cfg->regs.clr_interrupt_reg);
2862 
2863         /* Wait for IOA to signal LDUMP exit - IOA reset alert will be cleared */
2864         while (delay < IPR_LDUMP_MAX_SHORT_ACK_DELAY_IN_USEC) {
2865                 temp_pcii_reg =
2866                     readl(ioa_cfg->regs.sense_uproc_interrupt_reg32);
2867 
2868                 if (!(temp_pcii_reg & IPR_UPROCI_RESET_ALERT))
2869                         return 0;
2870 
2871                 udelay(10);
2872                 delay += 10;
2873         }
2874 
2875         return 0;
2876 }
2877 
2878 #ifdef CONFIG_SCSI_IPR_DUMP
2879 /**
2880  * ipr_sdt_copy - Copy Smart Dump Table to kernel buffer
2881  * @ioa_cfg:            ioa config struct
2882  * @pci_address:        adapter address
2883  * @length:                     length of data to copy
2884  *
2885  * Copy data from PCI adapter to kernel buffer.
2886  * Note: length MUST be a 4 byte multiple
2887  * Return value:
2888  *      0 on success / other on failure
2889  **/
2890 static int ipr_sdt_copy(struct ipr_ioa_cfg *ioa_cfg,
2891                         unsigned long pci_address, u32 length)
2892 {
2893         int bytes_copied = 0;
2894         int cur_len, rc, rem_len, rem_page_len, max_dump_size;
2895         __be32 *page;
2896         unsigned long lock_flags = 0;
2897         struct ipr_ioa_dump *ioa_dump = &ioa_cfg->dump->ioa_dump;
2898 
2899         if (ioa_cfg->sis64)
2900                 max_dump_size = IPR_FMT3_MAX_IOA_DUMP_SIZE;
2901         else
2902                 max_dump_size = IPR_FMT2_MAX_IOA_DUMP_SIZE;
2903 
2904         while (bytes_copied < length &&
2905                (ioa_dump->hdr.len + bytes_copied) < max_dump_size) {
2906                 if (ioa_dump->page_offset >= PAGE_SIZE ||
2907                     ioa_dump->page_offset == 0) {
2908                         page = (__be32 *)__get_free_page(GFP_ATOMIC);
2909 
2910                         if (!page) {
2911                                 ipr_trace;
2912                                 return bytes_copied;
2913                         }
2914 
2915                         ioa_dump->page_offset = 0;
2916                         ioa_dump->ioa_data[ioa_dump->next_page_index] = page;
2917                         ioa_dump->next_page_index++;
2918                 } else
2919                         page = ioa_dump->ioa_data[ioa_dump->next_page_index - 1];
2920 
2921                 rem_len = length - bytes_copied;
2922                 rem_page_len = PAGE_SIZE - ioa_dump->page_offset;
2923                 cur_len = min(rem_len, rem_page_len);
2924 
2925                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2926                 if (ioa_cfg->sdt_state == ABORT_DUMP) {
2927                         rc = -EIO;
2928                 } else {
2929                         rc = ipr_get_ldump_data_section(ioa_cfg,
2930                                                         pci_address + bytes_copied,
2931                                                         &page[ioa_dump->page_offset / 4],
2932                                                         (cur_len / sizeof(u32)));
2933                 }
2934                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2935 
2936                 if (!rc) {
2937                         ioa_dump->page_offset += cur_len;
2938                         bytes_copied += cur_len;
2939                 } else {
2940                         ipr_trace;
2941                         break;
2942                 }
2943                 schedule();
2944         }
2945 
2946         return bytes_copied;
2947 }
2948 
2949 /**
2950  * ipr_init_dump_entry_hdr - Initialize a dump entry header.
2951  * @hdr:        dump entry header struct
2952  *
2953  * Return value:
2954  *      nothing
2955  **/
2956 static void ipr_init_dump_entry_hdr(struct ipr_dump_entry_header *hdr)
2957 {
2958         hdr->eye_catcher = IPR_DUMP_EYE_CATCHER;
2959         hdr->num_elems = 1;
2960         hdr->offset = sizeof(*hdr);
2961         hdr->status = IPR_DUMP_STATUS_SUCCESS;
2962 }
2963 
2964 /**
2965  * ipr_dump_ioa_type_data - Fill in the adapter type in the dump.
2966  * @ioa_cfg:    ioa config struct
2967  * @driver_dump:        driver dump struct
2968  *
2969  * Return value:
2970  *      nothing
2971  **/
2972 static void ipr_dump_ioa_type_data(struct ipr_ioa_cfg *ioa_cfg,
2973                                    struct ipr_driver_dump *driver_dump)
2974 {
2975         struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
2976 
2977         ipr_init_dump_entry_hdr(&driver_dump->ioa_type_entry.hdr);
2978         driver_dump->ioa_type_entry.hdr.len =
2979                 sizeof(struct ipr_dump_ioa_type_entry) -
2980                 sizeof(struct ipr_dump_entry_header);
2981         driver_dump->ioa_type_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
2982         driver_dump->ioa_type_entry.hdr.id = IPR_DUMP_DRIVER_TYPE_ID;
2983         driver_dump->ioa_type_entry.type = ioa_cfg->type;
2984         driver_dump->ioa_type_entry.fw_version = (ucode_vpd->major_release << 24) |
2985                 (ucode_vpd->card_type << 16) | (ucode_vpd->minor_release[0] << 8) |
2986                 ucode_vpd->minor_release[1];
2987         driver_dump->hdr.num_entries++;
2988 }
2989 
2990 /**
2991  * ipr_dump_version_data - Fill in the driver version in the dump.
2992  * @ioa_cfg:    ioa config struct
2993  * @driver_dump:        driver dump struct
2994  *
2995  * Return value:
2996  *      nothing
2997  **/
2998 static void ipr_dump_version_data(struct ipr_ioa_cfg *ioa_cfg,
2999                                   struct ipr_driver_dump *driver_dump)
3000 {
3001         ipr_init_dump_entry_hdr(&driver_dump->version_entry.hdr);
3002         driver_dump->version_entry.hdr.len =
3003                 sizeof(struct ipr_dump_version_entry) -
3004                 sizeof(struct ipr_dump_entry_header);
3005         driver_dump->version_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_ASCII;
3006         driver_dump->version_entry.hdr.id = IPR_DUMP_DRIVER_VERSION_ID;
3007         strcpy(driver_dump->version_entry.version, IPR_DRIVER_VERSION);
3008         driver_dump->hdr.num_entries++;
3009 }
3010 
3011 /**
3012  * ipr_dump_trace_data - Fill in the IOA trace in the dump.
3013  * @ioa_cfg:    ioa config struct
3014  * @driver_dump:        driver dump struct
3015  *
3016  * Return value:
3017  *      nothing
3018  **/
3019 static void ipr_dump_trace_data(struct ipr_ioa_cfg *ioa_cfg,
3020                                    struct ipr_driver_dump *driver_dump)
3021 {
3022         ipr_init_dump_entry_hdr(&driver_dump->trace_entry.hdr);
3023         driver_dump->trace_entry.hdr.len =
3024                 sizeof(struct ipr_dump_trace_entry) -
3025                 sizeof(struct ipr_dump_entry_header);
3026         driver_dump->trace_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
3027         driver_dump->trace_entry.hdr.id = IPR_DUMP_TRACE_ID;
3028         memcpy(driver_dump->trace_entry.trace, ioa_cfg->trace, IPR_TRACE_SIZE);
3029         driver_dump->hdr.num_entries++;
3030 }
3031 
3032 /**
3033  * ipr_dump_location_data - Fill in the IOA location in the dump.
3034  * @ioa_cfg:    ioa config struct
3035  * @driver_dump:        driver dump struct
3036  *
3037  * Return value:
3038  *      nothing
3039  **/
3040 static void ipr_dump_location_data(struct ipr_ioa_cfg *ioa_cfg,
3041                                    struct ipr_driver_dump *driver_dump)
3042 {
3043         ipr_init_dump_entry_hdr(&driver_dump->location_entry.hdr);
3044         driver_dump->location_entry.hdr.len =
3045                 sizeof(struct ipr_dump_location_entry) -
3046                 sizeof(struct ipr_dump_entry_header);
3047         driver_dump->location_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_ASCII;
3048         driver_dump->location_entry.hdr.id = IPR_DUMP_LOCATION_ID;
3049         strcpy(driver_dump->location_entry.location, dev_name(&ioa_cfg->pdev->dev));
3050         driver_dump->hdr.num_entries++;
3051 }
3052 
3053 /**
3054  * ipr_get_ioa_dump - Perform a dump of the driver and adapter.
3055  * @ioa_cfg:    ioa config struct
3056  * @dump:               dump struct
3057  *
3058  * Return value:
3059  *      nothing
3060  **/
3061 static void ipr_get_ioa_dump(struct ipr_ioa_cfg *ioa_cfg, struct ipr_dump *dump)
3062 {
3063         unsigned long start_addr, sdt_word;
3064         unsigned long lock_flags = 0;
3065         struct ipr_driver_dump *driver_dump = &dump->driver_dump;
3066         struct ipr_ioa_dump *ioa_dump = &dump->ioa_dump;
3067         u32 num_entries, max_num_entries, start_off, end_off;
3068         u32 max_dump_size, bytes_to_copy, bytes_copied, rc;
3069         struct ipr_sdt *sdt;
3070         int valid = 1;
3071         int i;
3072 
3073         ENTER;
3074 
3075         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3076 
3077         if (ioa_cfg->sdt_state != READ_DUMP) {
3078                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3079                 return;
3080         }
3081 
3082         if (ioa_cfg->sis64) {
3083                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3084                 ssleep(IPR_DUMP_DELAY_SECONDS);
3085                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3086         }
3087 
3088         start_addr = readl(ioa_cfg->ioa_mailbox);
3089 
3090         if (!ioa_cfg->sis64 && !ipr_sdt_is_fmt2(start_addr)) {
3091                 dev_err(&ioa_cfg->pdev->dev,
3092                         "Invalid dump table format: %lx\n", start_addr);
3093                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3094                 return;
3095         }
3096 
3097         dev_err(&ioa_cfg->pdev->dev, "Dump of IOA initiated\n");
3098 
3099         driver_dump->hdr.eye_catcher = IPR_DUMP_EYE_CATCHER;
3100 
3101         /* Initialize the overall dump header */
3102         driver_dump->hdr.len = sizeof(struct ipr_driver_dump);
3103         driver_dump->hdr.num_entries = 1;
3104         driver_dump->hdr.first_entry_offset = sizeof(struct ipr_dump_header);
3105         driver_dump->hdr.status = IPR_DUMP_STATUS_SUCCESS;
3106         driver_dump->hdr.os = IPR_DUMP_OS_LINUX;
3107         driver_dump->hdr.driver_name = IPR_DUMP_DRIVER_NAME;
3108 
3109         ipr_dump_version_data(ioa_cfg, driver_dump);
3110         ipr_dump_location_data(ioa_cfg, driver_dump);
3111         ipr_dump_ioa_type_data(ioa_cfg, driver_dump);
3112         ipr_dump_trace_data(ioa_cfg, driver_dump);
3113 
3114         /* Update dump_header */
3115         driver_dump->hdr.len += sizeof(struct ipr_dump_entry_header);
3116 
3117         /* IOA Dump entry */
3118         ipr_init_dump_entry_hdr(&ioa_dump->hdr);
3119         ioa_dump->hdr.len = 0;
3120         ioa_dump->hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
3121         ioa_dump->hdr.id = IPR_DUMP_IOA_DUMP_ID;
3122 
3123         /* First entries in sdt are actually a list of dump addresses and
3124          lengths to gather the real dump data.  sdt represents the pointer
3125          to the ioa generated dump table.  Dump data will be extracted based
3126          on entries in this table */
3127         sdt = &ioa_dump->sdt;
3128 
3129         if (ioa_cfg->sis64) {
3130                 max_num_entries = IPR_FMT3_NUM_SDT_ENTRIES;
3131                 max_dump_size = IPR_FMT3_MAX_IOA_DUMP_SIZE;
3132         } else {
3133                 max_num_entries = IPR_FMT2_NUM_SDT_ENTRIES;
3134                 max_dump_size = IPR_FMT2_MAX_IOA_DUMP_SIZE;
3135         }
3136 
3137         bytes_to_copy = offsetof(struct ipr_sdt, entry) +
3138                         (max_num_entries * sizeof(struct ipr_sdt_entry));
3139         rc = ipr_get_ldump_data_section(ioa_cfg, start_addr, (__be32 *)sdt,
3140                                         bytes_to_copy / sizeof(__be32));
3141 
3142         /* Smart Dump table is ready to use and the first entry is valid */
3143         if (rc || ((be32_to_cpu(sdt->hdr.state) != IPR_FMT3_SDT_READY_TO_USE) &&
3144             (be32_to_cpu(sdt->hdr.state) != IPR_FMT2_SDT_READY_TO_USE))) {
3145                 dev_err(&ioa_cfg->pdev->dev,
3146                         "Dump of IOA failed. Dump table not valid: %d, %X.\n",
3147                         rc, be32_to_cpu(sdt->hdr.state));
3148                 driver_dump->hdr.status = IPR_DUMP_STATUS_FAILED;
3149                 ioa_cfg->sdt_state = DUMP_OBTAINED;
3150                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3151                 return;
3152         }
3153 
3154         num_entries = be32_to_cpu(sdt->hdr.num_entries_used);
3155 
3156         if (num_entries > max_num_entries)
3157                 num_entries = max_num_entries;
3158 
3159         /* Update dump length to the actual data to be copied */
3160         dump->driver_dump.hdr.len += sizeof(struct ipr_sdt_header);
3161         if (ioa_cfg->sis64)
3162                 dump->driver_dump.hdr.len += num_entries * sizeof(struct ipr_sdt_entry);
3163         else
3164                 dump->driver_dump.hdr.len += max_num_entries * sizeof(struct ipr_sdt_entry);
3165 
3166         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3167 
3168         for (i = 0; i < num_entries; i++) {
3169                 if (ioa_dump->hdr.len > max_dump_size) {
3170                         driver_dump->hdr.status = IPR_DUMP_STATUS_QUAL_SUCCESS;
3171                         break;
3172                 }
3173 
3174                 if (sdt->entry[i].flags & IPR_SDT_VALID_ENTRY) {
3175                         sdt_word = be32_to_cpu(sdt->entry[i].start_token);
3176                         if (ioa_cfg->sis64)
3177                                 bytes_to_copy = be32_to_cpu(sdt->entry[i].end_token);
3178                         else {
3179                                 start_off = sdt_word & IPR_FMT2_MBX_ADDR_MASK;
3180                                 end_off = be32_to_cpu(sdt->entry[i].end_token);
3181 
3182                                 if (ipr_sdt_is_fmt2(sdt_word) && sdt_word)
3183                                         bytes_to_copy = end_off - start_off;
3184                                 else
3185                                         valid = 0;
3186                         }
3187                         if (valid) {
3188                                 if (bytes_to_copy > max_dump_size) {
3189                                         sdt->entry[i].flags &= ~IPR_SDT_VALID_ENTRY;
3190                                         continue;
3191                                 }
3192 
3193                                 /* Copy data from adapter to driver buffers */
3194                                 bytes_copied = ipr_sdt_copy(ioa_cfg, sdt_word,
3195                                                             bytes_to_copy);
3196 
3197                                 ioa_dump->hdr.len += bytes_copied;
3198 
3199                                 if (bytes_copied != bytes_to_copy) {
3200                                         driver_dump->hdr.status = IPR_DUMP_STATUS_QUAL_SUCCESS;
3201                                         break;
3202                                 }
3203                         }
3204                 }
3205         }
3206 
3207         dev_err(&ioa_cfg->pdev->dev, "Dump of IOA completed.\n");
3208 
3209         /* Update dump_header */
3210         driver_dump->hdr.len += ioa_dump->hdr.len;
3211         wmb();
3212         ioa_cfg->sdt_state = DUMP_OBTAINED;
3213         LEAVE;
3214 }
3215 
3216 #else
3217 #define ipr_get_ioa_dump(ioa_cfg, dump) do { } while (0)
3218 #endif
3219 
3220 /**
3221  * ipr_release_dump - Free adapter dump memory
3222  * @kref:       kref struct
3223  *
3224  * Return value:
3225  *      nothing
3226  **/
3227 static void ipr_release_dump(struct kref *kref)
3228 {
3229         struct ipr_dump *dump = container_of(kref, struct ipr_dump, kref);
3230         struct ipr_ioa_cfg *ioa_cfg = dump->ioa_cfg;
3231         unsigned long lock_flags = 0;
3232         int i;
3233 
3234         ENTER;
3235         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3236         ioa_cfg->dump = NULL;
3237         ioa_cfg->sdt_state = INACTIVE;
3238         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3239 
3240         for (i = 0; i < dump->ioa_dump.next_page_index; i++)
3241                 free_page((unsigned long) dump->ioa_dump.ioa_data[i]);
3242 
3243         vfree(dump->ioa_dump.ioa_data);
3244         kfree(dump);
3245         LEAVE;
3246 }
3247 
3248 /**
3249  * ipr_worker_thread - Worker thread
3250  * @work:               ioa config struct
3251  *
3252  * Called at task level from a work thread. This function takes care
3253  * of adding and removing device from the mid-layer as configuration
3254  * changes are detected by the adapter.
3255  *
3256  * Return value:
3257  *      nothing
3258  **/
3259 static void ipr_worker_thread(struct work_struct *work)
3260 {
3261         unsigned long lock_flags;
3262         struct ipr_resource_entry *res;
3263         struct scsi_device *sdev;
3264         struct ipr_dump *dump;
3265         struct ipr_ioa_cfg *ioa_cfg =
3266                 container_of(work, struct ipr_ioa_cfg, work_q);
3267         u8 bus, target, lun;
3268         int did_work;
3269 
3270         ENTER;
3271         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3272 
3273         if (ioa_cfg->sdt_state == READ_DUMP) {
3274                 dump = ioa_cfg->dump;
3275                 if (!dump) {
3276                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3277                         return;
3278                 }
3279                 kref_get(&dump->kref);
3280                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3281                 ipr_get_ioa_dump(ioa_cfg, dump);
3282                 kref_put(&dump->kref, ipr_release_dump);
3283 
3284                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3285                 if (ioa_cfg->sdt_state == DUMP_OBTAINED && !ioa_cfg->dump_timeout)
3286                         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
3287                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3288                 return;
3289         }
3290 
3291         if (!ioa_cfg->scan_enabled) {
3292                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3293                 return;
3294         }
3295 
3296 restart:
3297         do {
3298                 did_work = 0;
3299                 if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds) {
3300                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3301                         return;
3302                 }
3303 
3304                 list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
3305                         if (res->del_from_ml && res->sdev) {
3306                                 did_work = 1;
3307                                 sdev = res->sdev;
3308                                 if (!scsi_device_get(sdev)) {
3309                                         if (!res->add_to_ml)
3310                                                 list_move_tail(&res->queue, &ioa_cfg->free_res_q);
3311                                         else
3312                                                 res->del_from_ml = 0;
3313                                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3314                                         scsi_remove_device(sdev);
3315                                         scsi_device_put(sdev);
3316                                         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3317                                 }
3318                                 break;
3319                         }
3320                 }
3321         } while (did_work);
3322 
3323         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
3324                 if (res->add_to_ml) {
3325                         bus = res->bus;
3326                         target = res->target;
3327                         lun = res->lun;
3328                         res->add_to_ml = 0;
3329                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3330                         scsi_add_device(ioa_cfg->host, bus, target, lun);
3331                         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3332                         goto restart;
3333                 }
3334         }
3335 
3336         ioa_cfg->scan_done = 1;
3337         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3338         kobject_uevent(&ioa_cfg->host->shost_dev.kobj, KOBJ_CHANGE);
3339         LEAVE;
3340 }
3341 
3342 #ifdef CONFIG_SCSI_IPR_TRACE
3343 /**
3344  * ipr_read_trace - Dump the adapter trace
3345  * @filp:               open sysfs file
3346  * @kobj:               kobject struct
3347  * @bin_attr:           bin_attribute struct
3348  * @buf:                buffer
3349  * @off:                offset
3350  * @count:              buffer size
3351  *
3352  * Return value:
3353  *      number of bytes printed to buffer
3354  **/
3355 static ssize_t ipr_read_trace(struct file *filp, struct kobject *kobj,
3356                               struct bin_attribute *bin_attr,
3357                               char *buf, loff_t off, size_t count)
3358 {
3359         struct device *dev = container_of(kobj, struct device, kobj);
3360         struct Scsi_Host *shost = class_to_shost(dev);
3361         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3362         unsigned long lock_flags = 0;
3363         ssize_t ret;
3364 
3365         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3366         ret = memory_read_from_buffer(buf, count, &off, ioa_cfg->trace,
3367                                 IPR_TRACE_SIZE);
3368         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3369 
3370         return ret;
3371 }
3372 
3373 static struct bin_attribute ipr_trace_attr = {
3374         .attr = {
3375                 .name = "trace",
3376                 .mode = S_IRUGO,
3377         },
3378         .size = 0,
3379         .read = ipr_read_trace,
3380 };
3381 #endif
3382 
3383 /**
3384  * ipr_show_fw_version - Show the firmware version
3385  * @dev:        class device struct
3386  * @buf:        buffer
3387  *
3388  * Return value:
3389  *      number of bytes printed to buffer
3390  **/
3391 static ssize_t ipr_show_fw_version(struct device *dev,
3392                                    struct device_attribute *attr, char *buf)
3393 {
3394         struct Scsi_Host *shost = class_to_shost(dev);
3395         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3396         struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
3397         unsigned long lock_flags = 0;
3398         int len;
3399 
3400         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3401         len = snprintf(buf, PAGE_SIZE, "%02X%02X%02X%02X\n",
3402                        ucode_vpd->major_release, ucode_vpd->card_type,
3403                        ucode_vpd->minor_release[0],
3404                        ucode_vpd->minor_release[1]);
3405         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3406         return len;
3407 }
3408 
3409 static struct device_attribute ipr_fw_version_attr = {
3410         .attr = {
3411                 .name =         "fw_version",
3412                 .mode =         S_IRUGO,
3413         },
3414         .show = ipr_show_fw_version,
3415 };
3416 
3417 /**
3418  * ipr_show_log_level - Show the adapter's error logging level
3419  * @dev:        class device struct
3420  * @buf:        buffer
3421  *
3422  * Return value:
3423  *      number of bytes printed to buffer
3424  **/
3425 static ssize_t ipr_show_log_level(struct device *dev,
3426                                    struct device_attribute *attr, char *buf)
3427 {
3428         struct Scsi_Host *shost = class_to_shost(dev);
3429         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3430         unsigned long lock_flags = 0;
3431         int len;
3432 
3433         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3434         len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->log_level);
3435         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3436         return len;
3437 }
3438 
3439 /**
3440  * ipr_store_log_level - Change the adapter's error logging level
3441  * @dev:        class device struct
3442  * @buf:        buffer
3443  *
3444  * Return value:
3445  *      number of bytes printed to buffer
3446  **/
3447 static ssize_t ipr_store_log_level(struct device *dev,
3448                                    struct device_attribute *attr,
3449                                    const char *buf, size_t count)
3450 {
3451         struct Scsi_Host *shost = class_to_shost(dev);
3452         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3453         unsigned long lock_flags = 0;
3454 
3455         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3456         ioa_cfg->log_level = simple_strtoul(buf, NULL, 10);
3457         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3458         return strlen(buf);
3459 }
3460 
3461 static struct device_attribute ipr_log_level_attr = {
3462         .attr = {
3463                 .name =         "log_level",
3464                 .mode =         S_IRUGO | S_IWUSR,
3465         },
3466         .show = ipr_show_log_level,
3467         .store = ipr_store_log_level
3468 };
3469 
3470 /**
3471  * ipr_store_diagnostics - IOA Diagnostics interface
3472  * @dev:        device struct
3473  * @buf:        buffer
3474  * @count:      buffer size
3475  *
3476  * This function will reset the adapter and wait a reasonable
3477  * amount of time for any errors that the adapter might log.
3478  *
3479  * Return value:
3480  *      count on success / other on failure
3481  **/
3482 static ssize_t ipr_store_diagnostics(struct device *dev,
3483                                      struct device_attribute *attr,
3484                                      const char *buf, size_t count)
3485 {
3486         struct Scsi_Host *shost = class_to_shost(dev);
3487         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3488         unsigned long lock_flags = 0;
3489         int rc = count;
3490 
3491         if (!capable(CAP_SYS_ADMIN))
3492                 return -EACCES;
3493 
3494         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3495         while (ioa_cfg->in_reset_reload) {
3496                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3497                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3498                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3499         }
3500 
3501         ioa_cfg->errors_logged = 0;
3502         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3503 
3504         if (ioa_cfg->in_reset_reload) {
3505                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3506                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3507 
3508                 /* Wait for a second for any errors to be logged */
3509                 msleep(1000);
3510         } else {
3511                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3512                 return -EIO;
3513         }
3514 
3515         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3516         if (ioa_cfg->in_reset_reload || ioa_cfg->errors_logged)
3517                 rc = -EIO;
3518         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3519 
3520         return rc;
3521 }
3522 
3523 static struct device_attribute ipr_diagnostics_attr = {
3524         .attr = {
3525                 .name =         "run_diagnostics",
3526                 .mode =         S_IWUSR,
3527         },
3528         .store = ipr_store_diagnostics
3529 };
3530 
3531 /**
3532  * ipr_show_adapter_state - Show the adapter's state
3533  * @class_dev:  device struct
3534  * @buf:        buffer
3535  *
3536  * Return value:
3537  *      number of bytes printed to buffer
3538  **/
3539 static ssize_t ipr_show_adapter_state(struct device *dev,
3540                                       struct device_attribute *attr, char *buf)
3541 {
3542         struct Scsi_Host *shost = class_to_shost(dev);
3543         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3544         unsigned long lock_flags = 0;
3545         int len;
3546 
3547         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3548         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
3549                 len = snprintf(buf, PAGE_SIZE, "offline\n");
3550         else
3551                 len = snprintf(buf, PAGE_SIZE, "online\n");
3552         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3553         return len;
3554 }
3555 
3556 /**
3557  * ipr_store_adapter_state - Change adapter state
3558  * @dev:        device struct
3559  * @buf:        buffer
3560  * @count:      buffer size
3561  *
3562  * This function will change the adapter's state.
3563  *
3564  * Return value:
3565  *      count on success / other on failure
3566  **/
3567 static ssize_t ipr_store_adapter_state(struct device *dev,
3568                                        struct device_attribute *attr,
3569                                        const char *buf, size_t count)
3570 {
3571         struct Scsi_Host *shost = class_to_shost(dev);
3572         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3573         unsigned long lock_flags;
3574         int result = count, i;
3575 
3576         if (!capable(CAP_SYS_ADMIN))
3577                 return -EACCES;
3578 
3579         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3580         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead &&
3581             !strncmp(buf, "online", 6)) {
3582                 for (i = 0; i < ioa_cfg->hrrq_num; i++) {
3583                         spin_lock(&ioa_cfg->hrrq[i]._lock);
3584                         ioa_cfg->hrrq[i].ioa_is_dead = 0;
3585                         spin_unlock(&ioa_cfg->hrrq[i]._lock);
3586                 }
3587                 wmb();
3588                 ioa_cfg->reset_retries = 0;
3589                 ioa_cfg->in_ioa_bringdown = 0;
3590                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
3591         }
3592         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3593         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3594 
3595         return result;
3596 }
3597 
3598 static struct device_attribute ipr_ioa_state_attr = {
3599         .attr = {
3600                 .name =         "online_state",
3601                 .mode =         S_IRUGO | S_IWUSR,
3602         },
3603         .show = ipr_show_adapter_state,
3604         .store = ipr_store_adapter_state
3605 };
3606 
3607 /**
3608  * ipr_store_reset_adapter - Reset the adapter
3609  * @dev:        device struct
3610  * @buf:        buffer
3611  * @count:      buffer size
3612  *
3613  * This function will reset the adapter.
3614  *
3615  * Return value:
3616  *      count on success / other on failure
3617  **/
3618 static ssize_t ipr_store_reset_adapter(struct device *dev,
3619                                        struct device_attribute *attr,
3620                                        const char *buf, size_t count)
3621 {
3622         struct Scsi_Host *shost = class_to_shost(dev);
3623         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3624         unsigned long lock_flags;
3625         int result = count;
3626 
3627         if (!capable(CAP_SYS_ADMIN))
3628                 return -EACCES;
3629 
3630         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3631         if (!ioa_cfg->in_reset_reload)
3632                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3633         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3634         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3635 
3636         return result;
3637 }
3638 
3639 static struct device_attribute ipr_ioa_reset_attr = {
3640         .attr = {
3641                 .name =         "reset_host",
3642                 .mode =         S_IWUSR,
3643         },
3644         .store = ipr_store_reset_adapter
3645 };
3646 
3647 static int ipr_iopoll(struct irq_poll *iop, int budget);
3648  /**
3649  * ipr_show_iopoll_weight - Show ipr polling mode
3650  * @dev:        class device struct
3651  * @buf:        buffer
3652  *
3653  * Return value:
3654  *      number of bytes printed to buffer
3655  **/
3656 static ssize_t ipr_show_iopoll_weight(struct device *dev,
3657                                    struct device_attribute *attr, char *buf)
3658 {
3659         struct Scsi_Host *shost = class_to_shost(dev);
3660         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3661         unsigned long lock_flags = 0;
3662         int len;
3663 
3664         spin_lock_irqsave(shost->host_lock, lock_flags);
3665         len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->iopoll_weight);
3666         spin_unlock_irqrestore(shost->host_lock, lock_flags);
3667 
3668         return len;
3669 }
3670 
3671 /**
3672  * ipr_store_iopoll_weight - Change the adapter's polling mode
3673  * @dev:        class device struct
3674  * @buf:        buffer
3675  *
3676  * Return value:
3677  *      number of bytes printed to buffer
3678  **/
3679 static ssize_t ipr_store_iopoll_weight(struct device *dev,
3680                                         struct device_attribute *attr,
3681                                         const char *buf, size_t count)
3682 {
3683         struct Scsi_Host *shost = class_to_shost(dev);
3684         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3685         unsigned long user_iopoll_weight;
3686         unsigned long lock_flags = 0;
3687         int i;
3688 
3689         if (!ioa_cfg->sis64) {
3690                 dev_info(&ioa_cfg->pdev->dev, "irq_poll not supported on this adapter\n");
3691                 return -EINVAL;
3692         }
3693         if (kstrtoul(buf, 10, &user_iopoll_weight))
3694                 return -EINVAL;
3695 
3696         if (user_iopoll_weight > 256) {
3697                 dev_info(&ioa_cfg->pdev->dev, "Invalid irq_poll weight. It must be less than 256\n");
3698                 return -EINVAL;
3699         }
3700 
3701         if (user_iopoll_weight == ioa_cfg->iopoll_weight) {
3702                 dev_info(&ioa_cfg->pdev->dev, "Current irq_poll weight has the same weight\n");
3703                 return strlen(buf);
3704         }
3705 
3706         if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
3707                 for (i = 1; i < ioa_cfg->hrrq_num; i++)
3708                         irq_poll_disable(&ioa_cfg->hrrq[i].iopoll);
3709         }
3710 
3711         spin_lock_irqsave(shost->host_lock, lock_flags);
3712         ioa_cfg->iopoll_weight = user_iopoll_weight;
3713         if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
3714                 for (i = 1; i < ioa_cfg->hrrq_num; i++) {
3715                         irq_poll_init(&ioa_cfg->hrrq[i].iopoll,
3716                                         ioa_cfg->iopoll_weight, ipr_iopoll);
3717                 }
3718         }
3719         spin_unlock_irqrestore(shost->host_lock, lock_flags);
3720 
3721         return strlen(buf);
3722 }
3723 
3724 static struct device_attribute ipr_iopoll_weight_attr = {
3725         .attr = {
3726                 .name =         "iopoll_weight",
3727                 .mode =         S_IRUGO | S_IWUSR,
3728         },
3729         .show = ipr_show_iopoll_weight,
3730         .store = ipr_store_iopoll_weight
3731 };
3732 
3733 /**
3734  * ipr_alloc_ucode_buffer - Allocates a microcode download buffer
3735  * @buf_len:            buffer length
3736  *
3737  * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3738  * list to use for microcode download
3739  *
3740  * Return value:
3741  *      pointer to sglist / NULL on failure
3742  **/
3743 static struct ipr_sglist *ipr_alloc_ucode_buffer(int buf_len)
3744 {
3745         int sg_size, order, bsize_elem, num_elem, i, j;
3746         struct ipr_sglist *sglist;
3747         struct scatterlist *scatterlist;
3748         struct page *page;
3749 
3750         /* Get the minimum size per scatter/gather element */
3751         sg_size = buf_len / (IPR_MAX_SGLIST - 1);
3752 
3753         /* Get the actual size per element */
3754         order = get_order(sg_size);
3755 
3756         /* Determine the actual number of bytes per element */
3757         bsize_elem = PAGE_SIZE * (1 << order);
3758 
3759         /* Determine the actual number of sg entries needed */
3760         if (buf_len % bsize_elem)
3761                 num_elem = (buf_len / bsize_elem) + 1;
3762         else
3763                 num_elem = buf_len / bsize_elem;
3764 
3765         /* Allocate a scatter/gather list for the DMA */
3766         sglist = kzalloc(sizeof(struct ipr_sglist) +
3767                          (sizeof(struct scatterlist) * (num_elem - 1)),
3768                          GFP_KERNEL);
3769 
3770         if (sglist == NULL) {
3771                 ipr_trace;
3772                 return NULL;
3773         }
3774 
3775         scatterlist = sglist->scatterlist;
3776         sg_init_table(scatterlist, num_elem);
3777 
3778         sglist->order = order;
3779         sglist->num_sg = num_elem;
3780 
3781         /* Allocate a bunch of sg elements */
3782         for (i = 0; i < num_elem; i++) {
3783                 page = alloc_pages(GFP_KERNEL, order);
3784                 if (!page) {
3785                         ipr_trace;
3786 
3787                         /* Free up what we already allocated */
3788                         for (j = i - 1; j >= 0; j--)
3789                                 __free_pages(sg_page(&scatterlist[j]), order);
3790                         kfree(sglist);
3791                         return NULL;
3792                 }
3793 
3794                 sg_set_page(&scatterlist[i], page, 0, 0);
3795         }
3796 
3797         return sglist;
3798 }
3799 
3800 /**
3801  * ipr_free_ucode_buffer - Frees a microcode download buffer
3802  * @p_dnld:             scatter/gather list pointer
3803  *
3804  * Free a DMA'able ucode download buffer previously allocated with
3805  * ipr_alloc_ucode_buffer
3806  *
3807  * Return value:
3808  *      nothing
3809  **/
3810 static void ipr_free_ucode_buffer(struct ipr_sglist *sglist)
3811 {
3812         int i;
3813 
3814         for (i = 0; i < sglist->num_sg; i++)
3815                 __free_pages(sg_page(&sglist->scatterlist[i]), sglist->order);
3816 
3817         kfree(sglist);
3818 }
3819 
3820 /**
3821  * ipr_copy_ucode_buffer - Copy user buffer to kernel buffer
3822  * @sglist:             scatter/gather list pointer
3823  * @buffer:             buffer pointer
3824  * @len:                buffer length
3825  *
3826  * Copy a microcode image from a user buffer into a buffer allocated by
3827  * ipr_alloc_ucode_buffer
3828  *
3829  * Return value:
3830  *      0 on success / other on failure
3831  **/
3832 static int ipr_copy_ucode_buffer(struct ipr_sglist *sglist,
3833                                  u8 *buffer, u32 len)
3834 {
3835         int bsize_elem, i, result = 0;
3836         struct scatterlist *scatterlist;
3837         void *kaddr;
3838 
3839         /* Determine the actual number of bytes per element */
3840         bsize_elem = PAGE_SIZE * (1 << sglist->order);
3841 
3842         scatterlist = sglist->scatterlist;
3843 
3844         for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3845                 struct page *page = sg_page(&scatterlist[i]);
3846 
3847                 kaddr = kmap(page);
3848                 memcpy(kaddr, buffer, bsize_elem);
3849                 kunmap(page);
3850 
3851                 scatterlist[i].length = bsize_elem;
3852 
3853                 if (result != 0) {
3854                         ipr_trace;
3855                         return result;
3856                 }
3857         }
3858 
3859         if (len % bsize_elem) {
3860                 struct page *page = sg_page(&scatterlist[i]);
3861 
3862                 kaddr = kmap(page);
3863                 memcpy(kaddr, buffer, len % bsize_elem);
3864                 kunmap(page);
3865 
3866                 scatterlist[i].length = len % bsize_elem;
3867         }
3868 
3869         sglist->buffer_len = len;
3870         return result;
3871 }
3872 
3873 /**
3874  * ipr_build_ucode_ioadl64 - Build a microcode download IOADL
3875  * @ipr_cmd:            ipr command struct
3876  * @sglist:             scatter/gather list
3877  *
3878  * Builds a microcode download IOA data list (IOADL).
3879  *
3880  **/
3881 static void ipr_build_ucode_ioadl64(struct ipr_cmnd *ipr_cmd,
3882                                     struct ipr_sglist *sglist)
3883 {
3884         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
3885         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
3886         struct scatterlist *scatterlist = sglist->scatterlist;
3887         int i;
3888 
3889         ipr_cmd->dma_use_sg = sglist->num_dma_sg;
3890         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
3891         ioarcb->data_transfer_length = cpu_to_be32(sglist->buffer_len);
3892 
3893         ioarcb->ioadl_len =
3894                 cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
3895         for (i = 0; i < ipr_cmd->dma_use_sg; i++) {
3896                 ioadl64[i].flags = cpu_to_be32(IPR_IOADL_FLAGS_WRITE);
3897                 ioadl64[i].data_len = cpu_to_be32(sg_dma_len(&scatterlist[i]));
3898                 ioadl64[i].address = cpu_to_be64(sg_dma_address(&scatterlist[i]));
3899         }
3900 
3901         ioadl64[i-1].flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
3902 }
3903 
3904 /**
3905  * ipr_build_ucode_ioadl - Build a microcode download IOADL
3906  * @ipr_cmd:    ipr command struct
3907  * @sglist:             scatter/gather list
3908  *
3909  * Builds a microcode download IOA data list (IOADL).
3910  *
3911  **/
3912 static void ipr_build_ucode_ioadl(struct ipr_cmnd *ipr_cmd,
3913                                   struct ipr_sglist *sglist)
3914 {
3915         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
3916         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
3917         struct scatterlist *scatterlist = sglist->scatterlist;
3918         int i;
3919 
3920         ipr_cmd->dma_use_sg = sglist->num_dma_sg;
3921         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
3922         ioarcb->data_transfer_length = cpu_to_be32(sglist->buffer_len);
3923 
3924         ioarcb->ioadl_len =
3925                 cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
3926 
3927         for (i = 0; i < ipr_cmd->dma_use_sg; i++) {
3928                 ioadl[i].flags_and_data_len =
3929                         cpu_to_be32(IPR_IOADL_FLAGS_WRITE | sg_dma_len(&scatterlist[i]));
3930                 ioadl[i].address =
3931                         cpu_to_be32(sg_dma_address(&scatterlist[i]));
3932         }
3933 
3934         ioadl[i-1].flags_and_data_len |=
3935                 cpu_to_be32(IPR_IOADL_FLAGS_LAST);
3936 }
3937 
3938 /**
3939  * ipr_update_ioa_ucode - Update IOA's microcode
3940  * @ioa_cfg:    ioa config struct
3941  * @sglist:             scatter/gather list
3942  *
3943  * Initiate an adapter reset to update the IOA's microcode
3944  *
3945  * Return value:
3946  *      0 on success / -EIO on failure
3947  **/
3948 static int ipr_update_ioa_ucode(struct ipr_ioa_cfg *ioa_cfg,
3949                                 struct ipr_sglist *sglist)
3950 {
3951         unsigned long lock_flags;
3952 
3953         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3954         while (ioa_cfg->in_reset_reload) {
3955                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3956                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3957                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3958         }
3959 
3960         if (ioa_cfg->ucode_sglist) {
3961                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3962                 dev_err(&ioa_cfg->pdev->dev,
3963                         "Microcode download already in progress\n");
3964                 return -EIO;
3965         }
3966 
3967         sglist->num_dma_sg = dma_map_sg(&ioa_cfg->pdev->dev,
3968                                         sglist->scatterlist, sglist->num_sg,
3969                                         DMA_TO_DEVICE);
3970 
3971         if (!sglist->num_dma_sg) {
3972                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3973                 dev_err(&ioa_cfg->pdev->dev,
3974                         "Failed to map microcode download buffer!\n");
3975                 return -EIO;
3976         }
3977 
3978         ioa_cfg->ucode_sglist = sglist;
3979         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3980         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3981         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3982 
3983         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3984         ioa_cfg->ucode_sglist = NULL;
3985         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3986         return 0;
3987 }
3988 
3989 /**
3990  * ipr_store_update_fw - Update the firmware on the adapter
3991  * @class_dev:  device struct
3992  * @buf:        buffer
3993  * @count:      buffer size
3994  *
3995  * This function will update the firmware on the adapter.
3996  *
3997  * Return value:
3998  *      count on success / other on failure
3999  **/
4000 static ssize_t ipr_store_update_fw(struct device *dev,
4001                                    struct device_attribute *attr,
4002                                    const char *buf, size_t count)
4003 {
4004         struct Scsi_Host *shost = class_to_shost(dev);
4005         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4006         struct ipr_ucode_image_header *image_hdr;
4007         const struct firmware *fw_entry;
4008         struct ipr_sglist *sglist;
4009         char fname[100];
4010         char *src;
4011         char *endline;
4012         int result, dnld_size;
4013 
4014         if (!capable(CAP_SYS_ADMIN))
4015                 return -EACCES;
4016 
4017         snprintf(fname, sizeof(fname), "%s", buf);
4018 
4019         endline = strchr(fname, '\n');
4020         if (endline)
4021                 *endline = '\0';
4022 
4023         if (request_firmware(&fw_entry, fname, &ioa_cfg->pdev->dev)) {
4024                 dev_err(&ioa_cfg->pdev->dev, "Firmware file %s not found\n", fname);
4025                 return -EIO;
4026         }
4027 
4028         image_hdr = (struct ipr_ucode_image_header *)fw_entry->data;
4029 
4030         src = (u8 *)image_hdr + be32_to_cpu(image_hdr->header_length);
4031         dnld_size = fw_entry->size - be32_to_cpu(image_hdr->header_length);
4032         sglist = ipr_alloc_ucode_buffer(dnld_size);
4033 
4034         if (!sglist) {
4035                 dev_err(&ioa_cfg->pdev->dev, "Microcode buffer allocation failed\n");
4036                 release_firmware(fw_entry);
4037                 return -ENOMEM;
4038         }
4039 
4040         result = ipr_copy_ucode_buffer(sglist, src, dnld_size);
4041 
4042         if (result) {
4043                 dev_err(&ioa_cfg->pdev->dev,
4044                         "Microcode buffer copy to DMA buffer failed\n");
4045                 goto out;
4046         }
4047 
4048         ipr_info("Updating microcode, please be patient.  This may take up to 30 minutes.\n");
4049 
4050         result = ipr_update_ioa_ucode(ioa_cfg, sglist);
4051 
4052         if (!result)
4053                 result = count;
4054 out:
4055         ipr_free_ucode_buffer(sglist);
4056         release_firmware(fw_entry);
4057         return result;
4058 }
4059 
4060 static struct device_attribute ipr_update_fw_attr = {
4061         .attr = {
4062                 .name =         "update_fw",
4063                 .mode =         S_IWUSR,
4064         },
4065         .store = ipr_store_update_fw
4066 };
4067 
4068 /**
4069  * ipr_show_fw_type - Show the adapter's firmware type.
4070  * @dev:        class device struct
4071  * @buf:        buffer
4072  *
4073  * Return value:
4074  *      number of bytes printed to buffer
4075  **/
4076 static ssize_t ipr_show_fw_type(struct device *dev,
4077                                 struct device_attribute *attr, char *buf)
4078 {
4079         struct Scsi_Host *shost = class_to_shost(dev);
4080         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4081         unsigned long lock_flags = 0;
4082         int len;
4083 
4084         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4085         len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->sis64);
4086         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4087         return len;
4088 }
4089 
4090 static struct device_attribute ipr_ioa_fw_type_attr = {
4091         .attr = {
4092                 .name =         "fw_type",
4093                 .mode =         S_IRUGO,
4094         },
4095         .show = ipr_show_fw_type
4096 };
4097 
4098 static struct device_attribute *ipr_ioa_attrs[] = {
4099         &ipr_fw_version_attr,
4100         &ipr_log_level_attr,
4101         &ipr_diagnostics_attr,
4102         &ipr_ioa_state_attr,
4103         &ipr_ioa_reset_attr,
4104         &ipr_update_fw_attr,
4105         &ipr_ioa_fw_type_attr,
4106         &ipr_iopoll_weight_attr,
4107         NULL,
4108 };
4109 
4110 #ifdef CONFIG_SCSI_IPR_DUMP
4111 /**
4112  * ipr_read_dump - Dump the adapter
4113  * @filp:               open sysfs file
4114  * @kobj:               kobject struct
4115  * @bin_attr:           bin_attribute struct
4116  * @buf:                buffer
4117  * @off:                offset
4118  * @count:              buffer size
4119  *
4120  * Return value:
4121  *      number of bytes printed to buffer
4122  **/
4123 static ssize_t ipr_read_dump(struct file *filp, struct kobject *kobj,
4124                              struct bin_attribute *bin_attr,
4125                              char *buf, loff_t off, size_t count)
4126 {
4127         struct device *cdev = container_of(kobj, struct device, kobj);
4128         struct Scsi_Host *shost = class_to_shost(cdev);
4129         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4130         struct ipr_dump *dump;
4131         unsigned long lock_flags = 0;
4132         char *src;
4133         int len, sdt_end;
4134         size_t rc = count;
4135 
4136         if (!capable(CAP_SYS_ADMIN))
4137                 return -EACCES;
4138 
4139         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4140         dump = ioa_cfg->dump;
4141 
4142         if (ioa_cfg->sdt_state != DUMP_OBTAINED || !dump) {
4143                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4144                 return 0;
4145         }
4146         kref_get(&dump->kref);
4147         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4148 
4149         if (off > dump->driver_dump.hdr.len) {
4150                 kref_put(&dump->kref, ipr_release_dump);
4151                 return 0;
4152         }
4153 
4154         if (off + count > dump->driver_dump.hdr.len) {
4155                 count = dump->driver_dump.hdr.len - off;
4156                 rc = count;
4157         }
4158 
4159         if (count && off < sizeof(dump->driver_dump)) {
4160                 if (off + count > sizeof(dump->driver_dump))
4161                         len = sizeof(dump->driver_dump) - off;
4162                 else
4163                         len = count;
4164                 src = (u8 *)&dump->driver_dump + off;
4165                 memcpy(buf, src, len);
4166                 buf += len;
4167                 off += len;
4168                 count -= len;
4169         }
4170 
4171         off -= sizeof(dump->driver_dump);
4172 
4173         if (ioa_cfg->sis64)
4174                 sdt_end = offsetof(struct ipr_ioa_dump, sdt.entry) +
4175                           (be32_to_cpu(dump->ioa_dump.sdt.hdr.num_entries_used) *
4176                            sizeof(struct ipr_sdt_entry));
4177         else
4178                 sdt_end = offsetof(struct ipr_ioa_dump, sdt.entry) +
4179                           (IPR_FMT2_NUM_SDT_ENTRIES * sizeof(struct ipr_sdt_entry));
4180 
4181         if (count && off < sdt_end) {
4182                 if (off + count > sdt_end)
4183                         len = sdt_end - off;
4184                 else
4185                         len = count;
4186                 src = (u8 *)&dump->ioa_dump + off;
4187                 memcpy(buf, src, len);
4188                 buf += len;
4189                 off += len;
4190                 count -= len;
4191         }
4192 
4193         off -= sdt_end;
4194 
4195         while (count) {
4196                 if ((off & PAGE_MASK) != ((off + count) & PAGE_MASK))
4197                         len = PAGE_ALIGN(off) - off;
4198                 else
4199                         len = count;
4200                 src = (u8 *)dump->ioa_dump.ioa_data[(off & PAGE_MASK) >> PAGE_SHIFT];
4201                 src += off & ~PAGE_MASK;
4202                 memcpy(buf, src, len);
4203                 buf += len;
4204                 off += len;
4205                 count -= len;
4206         }
4207 
4208         kref_put(&dump->kref, ipr_release_dump);
4209         return rc;
4210 }
4211 
4212 /**
4213  * ipr_alloc_dump - Prepare for adapter dump
4214  * @ioa_cfg:    ioa config struct
4215  *
4216  * Return value:
4217  *      0 on success / other on failure
4218  **/
4219 static int ipr_alloc_dump(struct ipr_ioa_cfg *ioa_cfg)
4220 {
4221         struct ipr_dump *dump;
4222         __be32 **ioa_data;
4223         unsigned long lock_flags = 0;
4224 
4225         dump = kzalloc(sizeof(struct ipr_dump), GFP_KERNEL);
4226 
4227         if (!dump) {
4228                 ipr_err("Dump memory allocation failed\n");
4229                 return -ENOMEM;
4230         }
4231 
4232         if (ioa_cfg->sis64)
4233                 ioa_data = vmalloc(IPR_FMT3_MAX_NUM_DUMP_PAGES * sizeof(__be32 *));
4234         else
4235                 ioa_data = vmalloc(IPR_FMT2_MAX_NUM_DUMP_PAGES * sizeof(__be32 *));
4236 
4237         if (!ioa_data) {
4238                 ipr_err("Dump memory allocation failed\n");
4239                 kfree(dump);
4240                 return -ENOMEM;
4241         }
4242 
4243         dump->ioa_dump.ioa_data = ioa_data;
4244 
4245         kref_init(&dump->kref);
4246         dump->ioa_cfg = ioa_cfg;
4247 
4248         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4249 
4250         if (INACTIVE != ioa_cfg->sdt_state) {
4251                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4252                 vfree(dump->ioa_dump.ioa_data);
4253                 kfree(dump);
4254                 return 0;
4255         }
4256 
4257         ioa_cfg->dump = dump;
4258         ioa_cfg->sdt_state = WAIT_FOR_DUMP;
4259         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead && !ioa_cfg->dump_taken) {
4260                 ioa_cfg->dump_taken = 1;
4261                 schedule_work(&ioa_cfg->work_q);
4262         }
4263         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4264 
4265         return 0;
4266 }
4267 
4268 /**
4269  * ipr_free_dump - Free adapter dump memory
4270  * @ioa_cfg:    ioa config struct
4271  *
4272  * Return value:
4273  *      0 on success / other on failure
4274  **/
4275 static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg)
4276 {
4277         struct ipr_dump *dump;
4278         unsigned long lock_flags = 0;
4279 
4280         ENTER;
4281 
4282         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4283         dump = ioa_cfg->dump;
4284         if (!dump) {
4285                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4286                 return 0;
4287         }
4288 
4289         ioa_cfg->dump = NULL;
4290         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4291 
4292         kref_put(&dump->kref, ipr_release_dump);
4293 
4294         LEAVE;
4295         return 0;
4296 }
4297 
4298 /**
4299  * ipr_write_dump - Setup dump state of adapter
4300  * @filp:               open sysfs file
4301  * @kobj:               kobject struct
4302  * @bin_attr:           bin_attribute struct
4303  * @buf:                buffer
4304  * @off:                offset
4305  * @count:              buffer size
4306  *
4307  * Return value:
4308  *      number of bytes printed to buffer
4309  **/
4310 static ssize_t ipr_write_dump(struct file *filp, struct kobject *kobj,
4311                               struct bin_attribute *bin_attr,
4312                               char *buf, loff_t off, size_t count)
4313 {
4314         struct device *cdev = container_of(kobj, struct device, kobj);
4315         struct Scsi_Host *shost = class_to_shost(cdev);
4316         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4317         int rc;
4318 
4319         if (!capable(CAP_SYS_ADMIN))
4320                 return -EACCES;
4321 
4322         if (buf[0] == '1')
4323                 rc = ipr_alloc_dump(ioa_cfg);
4324         else if (buf[0] == '')
4325                 rc = ipr_free_dump(ioa_cfg);
4326         else
4327                 return -EINVAL;
4328 
4329         if (rc)
4330                 return rc;
4331         else
4332                 return count;
4333 }
4334 
4335 static struct bin_attribute ipr_dump_attr = {
4336         .attr = {
4337                 .name = "dump",
4338                 .mode = S_IRUSR | S_IWUSR,
4339         },
4340         .size = 0,
4341         .read = ipr_read_dump,
4342         .write = ipr_write_dump
4343 };
4344 #else
4345 static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg) { return 0; };
4346 #endif
4347 
4348 /**
4349  * ipr_change_queue_depth - Change the device's queue depth
4350  * @sdev:       scsi device struct
4351  * @qdepth:     depth to set
4352  * @reason:     calling context
4353  *
4354  * Return value:
4355  *      actual depth set
4356  **/
4357 static int ipr_change_queue_depth(struct scsi_device *sdev, int qdepth)
4358 {
4359         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4360         struct ipr_resource_entry *res;
4361         unsigned long lock_flags = 0;
4362 
4363         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4364         res = (struct ipr_resource_entry *)sdev->hostdata;
4365 
4366         if (res && ipr_is_gata(res) && qdepth > IPR_MAX_CMD_PER_ATA_LUN)
4367                 qdepth = IPR_MAX_CMD_PER_ATA_LUN;
4368         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4369 
4370         scsi_change_queue_depth(sdev, qdepth);
4371         return sdev->queue_depth;
4372 }
4373 
4374 /**
4375  * ipr_show_adapter_handle - Show the adapter's resource handle for this device
4376  * @dev:        device struct
4377  * @attr:       device attribute structure
4378  * @buf:        buffer
4379  *
4380  * Return value:
4381  *      number of bytes printed to buffer
4382  **/
4383 static ssize_t ipr_show_adapter_handle(struct device *dev, struct device_attribute *attr, char *buf)
4384 {
4385         struct scsi_device *sdev = to_scsi_device(dev);
4386         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4387         struct ipr_resource_entry *res;
4388         unsigned long lock_flags = 0;
4389         ssize_t len = -ENXIO;
4390 
4391         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4392         res = (struct ipr_resource_entry *)sdev->hostdata;
4393         if (res)
4394                 len = snprintf(buf, PAGE_SIZE, "%08X\n", res->res_handle);
4395         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4396         return len;
4397 }
4398 
4399 static struct device_attribute ipr_adapter_handle_attr = {
4400         .attr = {
4401                 .name =         "adapter_handle",
4402                 .mode =         S_IRUSR,
4403         },
4404         .show = ipr_show_adapter_handle
4405 };
4406 
4407 /**
4408  * ipr_show_resource_path - Show the resource path or the resource address for
4409  *                          this device.
4410  * @dev:        device struct
4411  * @attr:       device attribute structure
4412  * @buf:        buffer
4413  *
4414  * Return value:
4415  *      number of bytes printed to buffer
4416  **/
4417 static ssize_t ipr_show_resource_path(struct device *dev, struct device_attribute *attr, char *buf)
4418 {
4419         struct scsi_device *sdev = to_scsi_device(dev);
4420         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4421         struct ipr_resource_entry *res;
4422         unsigned long lock_flags = 0;
4423         ssize_t len = -ENXIO;
4424         char buffer[IPR_MAX_RES_PATH_LENGTH];
4425 
4426         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4427         res = (struct ipr_resource_entry *)sdev->hostdata;
4428         if (res && ioa_cfg->sis64)
4429                 len = snprintf(buf, PAGE_SIZE, "%s\n",
4430                                __ipr_format_res_path(res->res_path, buffer,
4431                                                      sizeof(buffer)));
4432         else if (res)
4433                 len = snprintf(buf, PAGE_SIZE, "%d:%d:%d:%d\n", ioa_cfg->host->host_no,
4434                                res->bus, res->target, res->lun);
4435 
4436         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4437         return len;
4438 }
4439 
4440 static struct device_attribute ipr_resource_path_attr = {
4441         .attr = {
4442                 .name =         "resource_path",
4443                 .mode =         S_IRUGO,
4444         },
4445         .show = ipr_show_resource_path
4446 };
4447 
4448 /**
4449  * ipr_show_device_id - Show the device_id for this device.
4450  * @dev:        device struct
4451  * @attr:       device attribute structure
4452  * @buf:        buffer
4453  *
4454  * Return value:
4455  *      number of bytes printed to buffer
4456  **/
4457 static ssize_t ipr_show_device_id(struct device *dev, struct device_attribute *attr, char *buf)
4458 {
4459         struct scsi_device *sdev = to_scsi_device(dev);
4460         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4461         struct ipr_resource_entry *res;
4462         unsigned long lock_flags = 0;
4463         ssize_t len = -ENXIO;
4464 
4465         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4466         res = (struct ipr_resource_entry *)sdev->hostdata;
4467         if (res && ioa_cfg->sis64)
4468                 len = snprintf(buf, PAGE_SIZE, "0x%llx\n", be64_to_cpu(res->dev_id));
4469         else if (res)
4470                 len = snprintf(buf, PAGE_SIZE, "0x%llx\n", res->lun_wwn);
4471 
4472         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4473         return len;
4474 }
4475 
4476 static struct device_attribute ipr_device_id_attr = {
4477         .attr = {
4478                 .name =         "device_id",
4479                 .mode =         S_IRUGO,
4480         },
4481         .show = ipr_show_device_id
4482 };
4483 
4484 /**
4485  * ipr_show_resource_type - Show the resource type for this device.
4486  * @dev:        device struct
4487  * @attr:       device attribute structure
4488  * @buf:        buffer
4489  *
4490  * Return value:
4491  *      number of bytes printed to buffer
4492  **/
4493 static ssize_t ipr_show_resource_type(struct device *dev, struct device_attribute *attr, char *buf)
4494 {
4495         struct scsi_device *sdev = to_scsi_device(dev);
4496         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4497         struct ipr_resource_entry *res;
4498         unsigned long lock_flags = 0;
4499         ssize_t len = -ENXIO;
4500 
4501         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4502         res = (struct ipr_resource_entry *)sdev->hostdata;
4503 
4504         if (res)
4505                 len = snprintf(buf, PAGE_SIZE, "%x\n", res->type);
4506 
4507         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4508         return len;
4509 }
4510 
4511 static struct device_attribute ipr_resource_type_attr = {
4512         .attr = {
4513                 .name =         "resource_type",
4514                 .mode =         S_IRUGO,
4515         },
4516         .show = ipr_show_resource_type
4517 };
4518 
4519 /**
4520  * ipr_show_raw_mode - Show the adapter's raw mode
4521  * @dev:        class device struct
4522  * @buf:        buffer
4523  *
4524  * Return value:
4525  *      number of bytes printed to buffer
4526  **/
4527 static ssize_t ipr_show_raw_mode(struct device *dev,
4528                                  struct device_attribute *attr, char *buf)
4529 {
4530         struct scsi_device *sdev = to_scsi_device(dev);
4531         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4532         struct ipr_resource_entry *res;
4533         unsigned long lock_flags = 0;
4534         ssize_t len;
4535 
4536         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4537         res = (struct ipr_resource_entry *)sdev->hostdata;
4538         if (res)
4539                 len = snprintf(buf, PAGE_SIZE, "%d\n", res->raw_mode);
4540         else
4541                 len = -ENXIO;
4542         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4543         return len;
4544 }
4545 
4546 /**
4547  * ipr_store_raw_mode - Change the adapter's raw mode
4548  * @dev:        class device struct
4549  * @buf:        buffer
4550  *
4551  * Return value:
4552  *      number of bytes printed to buffer
4553  **/
4554 static ssize_t ipr_store_raw_mode(struct device *dev,
4555                                   struct device_attribute *attr,
4556                                   const char *buf, size_t count)
4557 {
4558         struct scsi_device *sdev = to_scsi_device(dev);
4559         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4560         struct ipr_resource_entry *res;
4561         unsigned long lock_flags = 0;
4562         ssize_t len;
4563 
4564         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4565         res = (struct ipr_resource_entry *)sdev->hostdata;
4566         if (res) {
4567                 if (ipr_is_af_dasd_device(res)) {
4568                         res->raw_mode = simple_strtoul(buf, NULL, 10);
4569                         len = strlen(buf);
4570                         if (res->sdev)
4571                                 sdev_printk(KERN_INFO, res->sdev, "raw mode is %s\n",
4572                                         res->raw_mode ? "enabled" : "disabled");
4573                 } else
4574                         len = -EINVAL;
4575         } else
4576                 len = -ENXIO;
4577         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4578         return len;
4579 }
4580 
4581 static struct device_attribute ipr_raw_mode_attr = {
4582         .attr = {
4583                 .name =         "raw_mode",
4584                 .mode =         S_IRUGO | S_IWUSR,
4585         },
4586         .show = ipr_show_raw_mode,
4587         .store = ipr_store_raw_mode
4588 };
4589 
4590 static struct device_attribute *ipr_dev_attrs[] = {
4591         &ipr_adapter_handle_attr,
4592         &ipr_resource_path_attr,
4593         &ipr_device_id_attr,
4594         &ipr_resource_type_attr,
4595         &ipr_raw_mode_attr,
4596         NULL,
4597 };
4598 
4599 /**
4600  * ipr_biosparam - Return the HSC mapping
4601  * @sdev:                       scsi device struct
4602  * @block_device:       block device pointer
4603  * @capacity:           capacity of the device
4604  * @parm:                       Array containing returned HSC values.
4605  *
4606  * This function generates the HSC parms that fdisk uses.
4607  * We want to make sure we return something that places partitions
4608  * on 4k boundaries for best performance with the IOA.
4609  *
4610  * Return value:
4611  *      0 on success
4612  **/
4613 static int ipr_biosparam(struct scsi_device *sdev,
4614                          struct block_device *block_device,
4615                          sector_t capacity, int *parm)
4616 {
4617         int heads, sectors;
4618         sector_t cylinders;
4619 
4620         heads = 128;
4621         sectors = 32;
4622 
4623         cylinders = capacity;
4624         sector_div(cylinders, (128 * 32));
4625 
4626         /* return result */
4627         parm[0] = heads;
4628         parm[1] = sectors;
4629         parm[2] = cylinders;
4630 
4631         return 0;
4632 }
4633 
4634 /**
4635  * ipr_find_starget - Find target based on bus/target.
4636  * @starget:    scsi target struct
4637  *
4638  * Return value:
4639  *      resource entry pointer if found / NULL if not found
4640  **/
4641 static struct ipr_resource_entry *ipr_find_starget(struct scsi_target *starget)
4642 {
4643         struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4644         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4645         struct ipr_resource_entry *res;
4646 
4647         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
4648                 if ((res->bus == starget->channel) &&
4649                     (res->target == starget->id)) {
4650                         return res;
4651                 }
4652         }
4653 
4654         return NULL;
4655 }
4656 
4657 static struct ata_port_info sata_port_info;
4658 
4659 /**
4660  * ipr_target_alloc - Prepare for commands to a SCSI target
4661  * @starget:    scsi target struct
4662  *
4663  * If the device is a SATA device, this function allocates an
4664  * ATA port with libata, else it does nothing.
4665  *
4666  * Return value:
4667  *      0 on success / non-0 on failure
4668  **/
4669 static int ipr_target_alloc(struct scsi_target *starget)
4670 {
4671         struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4672         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4673         struct ipr_sata_port *sata_port;
4674         struct ata_port *ap;
4675         struct ipr_resource_entry *res;
4676         unsigned long lock_flags;
4677 
4678         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4679         res = ipr_find_starget(starget);
4680         starget->hostdata = NULL;
4681 
4682         if (res && ipr_is_gata(res)) {
4683                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4684                 sata_port = kzalloc(sizeof(*sata_port), GFP_KERNEL);
4685                 if (!sata_port)
4686                         return -ENOMEM;
4687 
4688                 ap = ata_sas_port_alloc(&ioa_cfg->ata_host, &sata_port_info, shost);
4689                 if (ap) {
4690                         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4691                         sata_port->ioa_cfg = ioa_cfg;
4692                         sata_port->ap = ap;
4693                         sata_port->res = res;
4694 
4695                         res->sata_port = sata_port;
4696                         ap->private_data = sata_port;
4697                         starget->hostdata = sata_port;
4698                 } else {
4699                         kfree(sata_port);
4700                         return -ENOMEM;
4701                 }
4702         }
4703         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4704 
4705         return 0;
4706 }
4707 
4708 /**
4709  * ipr_target_destroy - Destroy a SCSI target
4710  * @starget:    scsi target struct
4711  *
4712  * If the device was a SATA device, this function frees the libata
4713  * ATA port, else it does nothing.
4714  *
4715  **/
4716 static void ipr_target_destroy(struct scsi_target *starget)
4717 {
4718         struct ipr_sata_port *sata_port = starget->hostdata;
4719         struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4720         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4721 
4722         if (ioa_cfg->sis64) {
4723                 if (!ipr_find_starget(starget)) {
4724                         if (starget->channel == IPR_ARRAY_VIRTUAL_BUS)
4725                                 clear_bit(starget->id, ioa_cfg->array_ids);
4726                         else if (starget->channel == IPR_VSET_VIRTUAL_BUS)
4727                                 clear_bit(starget->id, ioa_cfg->vset_ids);
4728                         else if (starget->channel == 0)
4729                                 clear_bit(starget->id, ioa_cfg->target_ids);
4730                 }
4731         }
4732 
4733         if (sata_port) {
4734                 starget->hostdata = NULL;
4735                 ata_sas_port_destroy(sata_port->ap);
4736                 kfree(sata_port);
4737         }
4738 }
4739 
4740 /**
4741  * ipr_find_sdev - Find device based on bus/target/lun.
4742  * @sdev:       scsi device struct
4743  *
4744  * Return value:
4745  *      resource entry pointer if found / NULL if not found
4746  **/
4747 static struct ipr_resource_entry *ipr_find_sdev(struct scsi_device *sdev)
4748 {
4749         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4750         struct ipr_resource_entry *res;
4751 
4752         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
4753                 if ((res->bus == sdev->channel) &&
4754                     (res->target == sdev->id) &&
4755                     (res->lun == sdev->lun))
4756                         return res;
4757         }
4758 
4759         return NULL;
4760 }
4761 
4762 /**
4763  * ipr_slave_destroy - Unconfigure a SCSI device
4764  * @sdev:       scsi device struct
4765  *
4766  * Return value:
4767  *      nothing
4768  **/
4769 static void ipr_slave_destroy(struct scsi_device *sdev)
4770 {
4771         struct ipr_resource_entry *res;
4772         struct ipr_ioa_cfg *ioa_cfg;
4773         unsigned long lock_flags = 0;
4774 
4775         ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4776 
4777         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4778         res = (struct ipr_resource_entry *) sdev->hostdata;
4779         if (res) {
4780                 if (res->sata_port)
4781                         res->sata_port->ap->link.device[0].class = ATA_DEV_NONE;
4782                 sdev->hostdata = NULL;
4783                 res->sdev = NULL;
4784                 res->sata_port = NULL;
4785         }
4786         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4787 }
4788 
4789 /**
4790  * ipr_slave_configure - Configure a SCSI device
4791  * @sdev:       scsi device struct
4792  *
4793  * This function configures the specified scsi device.
4794  *
4795  * Return value:
4796  *      0 on success
4797  **/
4798 static int ipr_slave_configure(struct scsi_device *sdev)
4799 {
4800         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4801         struct ipr_resource_entry *res;
4802         struct ata_port *ap = NULL;
4803         unsigned long lock_flags = 0;
4804         char buffer[IPR_MAX_RES_PATH_LENGTH];
4805 
4806         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4807         res = sdev->hostdata;
4808         if (res) {
4809                 if (ipr_is_af_dasd_device(res))
4810                         sdev->type = TYPE_RAID;
4811                 if (ipr_is_af_dasd_device(res) || ipr_is_ioa_resource(res)) {
4812                         sdev->scsi_level = 4;
4813                         sdev->no_uld_attach = 1;
4814                 }
4815                 if (ipr_is_vset_device(res)) {
4816                         sdev->scsi_level = SCSI_SPC_3;
4817                         blk_queue_rq_timeout(sdev->request_queue,
4818                                              IPR_VSET_RW_TIMEOUT);
4819                         blk_queue_max_hw_sectors(sdev->request_queue, IPR_VSET_MAX_SECTORS);
4820                 }
4821                 if (ipr_is_gata(res) && res->sata_port)
4822                         ap = res->sata_port->ap;
4823                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4824 
4825                 if (ap) {
4826                         scsi_change_queue_depth(sdev, IPR_MAX_CMD_PER_ATA_LUN);
4827                         ata_sas_slave_configure(sdev, ap);
4828                 }
4829 
4830                 if (ioa_cfg->sis64)
4831                         sdev_printk(KERN_INFO, sdev, "Resource path: %s\n",
4832                                     ipr_format_res_path(ioa_cfg,
4833                                 res->res_path, buffer, sizeof(buffer)));
4834                 return 0;
4835         }
4836         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4837         return 0;
4838 }
4839 
4840 /**
4841  * ipr_ata_slave_alloc - Prepare for commands to a SATA device
4842  * @sdev:       scsi device struct
4843  *
4844  * This function initializes an ATA port so that future commands
4845  * sent through queuecommand will work.
4846  *
4847  * Return value:
4848  *      0 on success
4849  **/
4850 static int ipr_ata_slave_alloc(struct scsi_device *sdev)
4851 {
4852         struct ipr_sata_port *sata_port = NULL;
4853         int rc = -ENXIO;
4854 
4855         ENTER;
4856         if (sdev->sdev_target)
4857                 sata_port = sdev->sdev_target->hostdata;
4858         if (sata_port) {
4859                 rc = ata_sas_port_init(sata_port->ap);
4860                 if (rc == 0)
4861                         rc = ata_sas_sync_probe(sata_port->ap);
4862         }
4863 
4864         if (rc)
4865                 ipr_slave_destroy(sdev);
4866 
4867         LEAVE;
4868         return rc;
4869 }
4870 
4871 /**
4872  * ipr_slave_alloc - Prepare for commands to a device.
4873  * @sdev:       scsi device struct
4874  *
4875  * This function saves a pointer to the resource entry
4876  * in the scsi device struct if the device exists. We
4877  * can then use this pointer in ipr_queuecommand when
4878  * handling new commands.
4879  *
4880  * Return value:
4881  *      0 on success / -ENXIO if device does not exist
4882  **/
4883 static int ipr_slave_alloc(struct scsi_device *sdev)
4884 {
4885         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4886         struct ipr_resource_entry *res;
4887         unsigned long lock_flags;
4888         int rc = -ENXIO;
4889 
4890         sdev->hostdata = NULL;
4891 
4892         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4893 
4894         res = ipr_find_sdev(sdev);
4895         if (res) {
4896                 res->sdev = sdev;
4897                 res->add_to_ml = 0;
4898                 res->in_erp = 0;
4899                 sdev->hostdata = res;
4900                 if (!ipr_is_naca_model(res))
4901                         res->needs_sync_complete = 1;
4902                 rc = 0;
4903                 if (ipr_is_gata(res)) {
4904                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4905                         return ipr_ata_slave_alloc(sdev);
4906                 }
4907         }
4908 
4909         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4910 
4911         return rc;
4912 }
4913 
4914 /**
4915  * ipr_match_lun - Match function for specified LUN
4916  * @ipr_cmd:    ipr command struct
4917  * @device:             device to match (sdev)
4918  *
4919  * Returns:
4920  *      1 if command matches sdev / 0 if command does not match sdev
4921  **/
4922 static int ipr_match_lun(struct ipr_cmnd *ipr_cmd, void *device)
4923 {
4924         if (ipr_cmd->scsi_cmd && ipr_cmd->scsi_cmd->device == device)
4925                 return 1;
4926         return 0;
4927 }
4928 
4929 /**
4930  * ipr_wait_for_ops - Wait for matching commands to complete
4931  * @ipr_cmd:    ipr command struct
4932  * @device:             device to match (sdev)
4933  * @match:              match function to use
4934  *
4935  * Returns:
4936  *      SUCCESS / FAILED
4937  **/
4938 static int ipr_wait_for_ops(struct ipr_ioa_cfg *ioa_cfg, void *device,
4939                             int (*match)(struct ipr_cmnd *, void *))
4940 {
4941         struct ipr_cmnd *ipr_cmd;
4942         int wait;
4943         unsigned long flags;
4944         struct ipr_hrr_queue *hrrq;
4945         signed long timeout = IPR_ABORT_TASK_TIMEOUT;
4946         DECLARE_COMPLETION_ONSTACK(comp);
4947 
4948         ENTER;
4949         do {
4950                 wait = 0;
4951 
4952                 for_each_hrrq(hrrq, ioa_cfg) {
4953                         spin_lock_irqsave(hrrq->lock, flags);
4954                         list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
4955                                 if (match(ipr_cmd, device)) {
4956                                         ipr_cmd->eh_comp = &comp;
4957                                         wait++;
4958                                 }
4959                         }
4960                         spin_unlock_irqrestore(hrrq->lock, flags);
4961                 }
4962 
4963                 if (wait) {
4964                         timeout = wait_for_completion_timeout(&comp, timeout);
4965 
4966                         if (!timeout) {
4967                                 wait = 0;
4968 
4969                                 for_each_hrrq(hrrq, ioa_cfg) {
4970                                         spin_lock_irqsave(hrrq->lock, flags);
4971                                         list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
4972                                                 if (match(ipr_cmd, device)) {
4973                                                         ipr_cmd->eh_comp = NULL;
4974                                                         wait++;
4975                                                 }
4976                                         }
4977                                         spin_unlock_irqrestore(hrrq->lock, flags);
4978                                 }
4979 
4980                                 if (wait)
4981                                         dev_err(&ioa_cfg->pdev->dev, "Timed out waiting for aborted commands\n");
4982                                 LEAVE;
4983                                 return wait ? FAILED : SUCCESS;
4984                         }
4985                 }
4986         } while (wait);
4987 
4988         LEAVE;
4989         return SUCCESS;
4990 }
4991 
4992 static int ipr_eh_host_reset(struct scsi_cmnd *cmd)
4993 {
4994         struct ipr_ioa_cfg *ioa_cfg;
4995         unsigned long lock_flags = 0;
4996         int rc = SUCCESS;
4997 
4998         ENTER;
4999         ioa_cfg = (struct ipr_ioa_cfg *) cmd->device->host->hostdata;
5000         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5001 
5002         if (!ioa_cfg->in_reset_reload && !ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
5003                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_ABBREV);
5004                 dev_err(&ioa_cfg->pdev->dev,
5005                         "Adapter being reset as a result of error recovery.\n");
5006 
5007                 if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
5008                         ioa_cfg->sdt_state = GET_DUMP;
5009         }
5010 
5011         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5012         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
5013         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5014 
5015         /* If we got hit with a host reset while we were already resetting
5016          the adapter for some reason, and the reset failed. */
5017         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
5018                 ipr_trace;
5019                 rc = FAILED;
5020         }
5021 
5022         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5023         LEAVE;
5024         return rc;
5025 }
5026 
5027 /**
5028  * ipr_device_reset - Reset the device
5029  * @ioa_cfg:    ioa config struct
5030  * @res:                resource entry struct
5031  *
5032  * This function issues a device reset to the affected device.
5033  * If the device is a SCSI device, a LUN reset will be sent
5034  * to the device first. If that does not work, a target reset
5035  * will be sent. If the device is a SATA device, a PHY reset will
5036  * be sent.
5037  *
5038  * Return value:
5039  *      0 on success / non-zero on failure
5040  **/
5041 static int ipr_device_reset(struct ipr_ioa_cfg *ioa_cfg,
5042                             struct ipr_resource_entry *res)
5043 {
5044         struct ipr_cmnd *ipr_cmd;
5045         struct ipr_ioarcb *ioarcb;
5046         struct ipr_cmd_pkt *cmd_pkt;
5047         struct ipr_ioarcb_ata_regs *regs;
5048         u32 ioasc;
5049 
5050         ENTER;
5051         ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
5052         ioarcb = &ipr_cmd->ioarcb;
5053         cmd_pkt = &ioarcb->cmd_pkt;
5054 
5055         if (ipr_cmd->ioa_cfg->sis64) {
5056                 regs = &ipr_cmd->i.ata_ioadl.regs;
5057                 ioarcb->add_cmd_parms_offset = cpu_to_be16(sizeof(*ioarcb));
5058         } else
5059                 regs = &ioarcb->u.add_data.u.regs;
5060 
5061         ioarcb->res_handle = res->res_handle;
5062         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5063         cmd_pkt->cdb[0] = IPR_RESET_DEVICE;
5064         if (ipr_is_gata(res)) {
5065                 cmd_pkt->cdb[2] = IPR_ATA_PHY_RESET;
5066                 ioarcb->add_cmd_parms_len = cpu_to_be16(sizeof(regs->flags));
5067                 regs->flags |= IPR_ATA_FLAG_STATUS_ON_GOOD_COMPLETION;
5068         }
5069 
5070         ipr_send_blocking_cmd(ipr_cmd, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
5071         ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5072         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5073         if (ipr_is_gata(res) && res->sata_port && ioasc != IPR_IOASC_IOA_WAS_RESET) {
5074                 if (ipr_cmd->ioa_cfg->sis64)
5075                         memcpy(&res->sata_port->ioasa, &ipr_cmd->s.ioasa64.u.gata,
5076                                sizeof(struct ipr_ioasa_gata));
5077                 else
5078                         memcpy(&res->sata_port->ioasa, &ipr_cmd->s.ioasa.u.gata,
5079                                sizeof(struct ipr_ioasa_gata));
5080         }
5081 
5082         LEAVE;
5083         return IPR_IOASC_SENSE_KEY(ioasc) ? -EIO : 0;
5084 }
5085 
5086 /**
5087  * ipr_sata_reset - Reset the SATA port
5088  * @link:       SATA link to reset
5089  * @classes:    class of the attached device
5090  *
5091  * This function issues a SATA phy reset to the affected ATA link.
5092  *
5093  * Return value:
5094  *      0 on success / non-zero on failure
5095  **/
5096 static int ipr_sata_reset(struct ata_link *link, unsigned int *classes,
5097                                 unsigned long deadline)
5098 {
5099         struct ipr_sata_port *sata_port = link->ap->private_data;
5100         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
5101         struct ipr_resource_entry *res;
5102         unsigned long lock_flags = 0;
5103         int rc = -ENXIO;
5104 
5105         ENTER;
5106         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5107         while (ioa_cfg->in_reset_reload) {
5108                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5109                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
5110                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5111         }
5112 
5113         res = sata_port->res;
5114         if (res) {
5115                 rc = ipr_device_reset(ioa_cfg, res);
5116                 *classes = res->ata_class;
5117         }
5118 
5119         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5120         LEAVE;
5121         return rc;
5122 }
5123 
5124 /**
5125  * ipr_eh_dev_reset - Reset the device
5126  * @scsi_cmd:   scsi command struct
5127  *
5128  * This function issues a device reset to the affected device.
5129  * A LUN reset will be sent to the device first. If that does
5130  * not work, a target reset will be sent.
5131  *
5132  * Return value:
5133  *      SUCCESS / FAILED
5134  **/
5135 static int __ipr_eh_dev_reset(struct scsi_cmnd *scsi_cmd)
5136 {
5137         struct ipr_cmnd *ipr_cmd;
5138         struct ipr_ioa_cfg *ioa_cfg;
5139         struct ipr_resource_entry *res;
5140         struct ata_port *ap;
5141         int rc = 0;
5142         struct ipr_hrr_queue *hrrq;
5143 
5144         ENTER;
5145         ioa_cfg = (struct ipr_ioa_cfg *) scsi_cmd->device->host->hostdata;
5146         res = scsi_cmd->device->hostdata;
5147 
5148         if (!res)
5149                 return FAILED;
5150 
5151         /*
5152          * If we are currently going through reset/reload, return failed. This will force the
5153          * mid-layer to call ipr_eh_host_reset, which will then go to sleep and wait for the
5154          * reset to complete
5155          */
5156         if (ioa_cfg->in_reset_reload)
5157                 return FAILED;
5158         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
5159                 return FAILED;
5160 
5161         for_each_hrrq(hrrq, ioa_cfg) {
5162                 spin_lock(&hrrq->_lock);
5163                 list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
5164                         if (ipr_cmd->ioarcb.res_handle == res->res_handle) {
5165                                 if (ipr_cmd->scsi_cmd)
5166                                         ipr_cmd->done = ipr_scsi_eh_done;
5167                                 if (ipr_cmd->qc)
5168                                         ipr_cmd->done = ipr_sata_eh_done;
5169                                 if (ipr_cmd->qc &&
5170                                     !(ipr_cmd->qc->flags & ATA_QCFLAG_FAILED)) {
5171                                         ipr_cmd->qc->err_mask |= AC_ERR_TIMEOUT;
5172                                         ipr_cmd->qc->flags |= ATA_QCFLAG_FAILED;
5173                                 }
5174                         }
5175                 }
5176                 spin_unlock(&hrrq->_lock);
5177         }
5178         res->resetting_device = 1;
5179         scmd_printk(KERN_ERR, scsi_cmd, "Resetting device\n");
5180 
5181         if (ipr_is_gata(res) && res->sata_port) {
5182                 ap = res->sata_port->ap;
5183                 spin_unlock_irq(scsi_cmd->device->host->host_lock);
5184                 ata_std_error_handler(ap);
5185                 spin_lock_irq(scsi_cmd->device->host->host_lock);
5186 
5187                 for_each_hrrq(hrrq, ioa_cfg) {
5188                         spin_lock(&hrrq->_lock);
5189                         list_for_each_entry(ipr_cmd,
5190                                             &hrrq->hrrq_pending_q, queue) {
5191                                 if (ipr_cmd->ioarcb.res_handle ==
5192                                     res->res_handle) {
5193                                         rc = -EIO;
5194                                         break;
5195                                 }
5196                         }
5197                         spin_unlock(&hrrq->_lock);
5198                 }
5199         } else
5200                 rc = ipr_device_reset(ioa_cfg, res);
5201         res->resetting_device = 0;
5202         res->reset_occurred = 1;
5203 
5204         LEAVE;
5205         return rc ? FAILED : SUCCESS;
5206 }
5207 
5208 static int ipr_eh_dev_reset(struct scsi_cmnd *cmd)
5209 {
5210         int rc;
5211         struct ipr_ioa_cfg *ioa_cfg;
5212 
5213         ioa_cfg = (struct ipr_ioa_cfg *) cmd->device->host->hostdata;
5214 
5215         spin_lock_irq(cmd->device->host->host_lock);
5216         rc = __ipr_eh_dev_reset(cmd);
5217         spin_unlock_irq(cmd->device->host->host_lock);
5218 
5219         if (rc == SUCCESS)
5220                 rc = ipr_wait_for_ops(ioa_cfg, cmd->device, ipr_match_lun);
5221 
5222         return rc;
5223 }
5224 
5225 /**
5226  * ipr_bus_reset_done - Op done function for bus reset.
5227  * @ipr_cmd:    ipr command struct
5228  *
5229  * This function is the op done function for a bus reset
5230  *
5231  * Return value:
5232  *      none
5233  **/
5234 static void ipr_bus_reset_done(struct ipr_cmnd *ipr_cmd)
5235 {
5236         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
5237         struct ipr_resource_entry *res;
5238 
5239         ENTER;
5240         if (!ioa_cfg->sis64)
5241                 list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
5242                         if (res->res_handle == ipr_cmd->ioarcb.res_handle) {
5243                                 scsi_report_bus_reset(ioa_cfg->host, res->bus);
5244                                 break;
5245                         }
5246                 }
5247 
5248         /*
5249          * If abort has not completed, indicate the reset has, else call the
5250          * abort's done function to wake the sleeping eh thread
5251          */
5252         if (ipr_cmd->sibling->sibling)
5253                 ipr_cmd->sibling->sibling = NULL;
5254         else
5255                 ipr_cmd->sibling->done(ipr_cmd->sibling);
5256 
5257         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5258         LEAVE;
5259 }
5260 
5261 /**
5262  * ipr_abort_timeout - An abort task has timed out
5263  * @ipr_cmd:    ipr command struct
5264  *
5265  * This function handles when an abort task times out. If this
5266  * happens we issue a bus reset since we have resources tied
5267  * up that must be freed before returning to the midlayer.
5268  *
5269  * Return value:
5270  *      none
5271  **/
5272 static void ipr_abort_timeout(struct ipr_cmnd *ipr_cmd)
5273 {
5274         struct ipr_cmnd *reset_cmd;
5275         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
5276         struct ipr_cmd_pkt *cmd_pkt;
5277         unsigned long lock_flags = 0;
5278 
5279         ENTER;
5280         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5281         if (ipr_cmd->completion.done || ioa_cfg->in_reset_reload) {
5282                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5283                 return;
5284         }
5285 
5286         sdev_printk(KERN_ERR, ipr_cmd->u.sdev, "Abort timed out. Resetting bus.\n");
5287         reset_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
5288         ipr_cmd->sibling = reset_cmd;
5289         reset_cmd->sibling = ipr_cmd;
5290         reset_cmd->ioarcb.res_handle = ipr_cmd->ioarcb.res_handle;
5291         cmd_pkt = &reset_cmd->ioarcb.cmd_pkt;
5292         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5293         cmd_pkt->cdb[0] = IPR_RESET_DEVICE;
5294         cmd_pkt->cdb[2] = IPR_RESET_TYPE_SELECT | IPR_BUS_RESET;
5295 
5296         ipr_do_req(reset_cmd, ipr_bus_reset_done, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
5297         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5298         LEAVE;
5299 }
5300 
5301 /**
5302  * ipr_cancel_op - Cancel specified op
5303  * @scsi_cmd:   scsi command struct
5304  *
5305  * This function cancels specified op.
5306  *
5307  * Return value:
5308  *      SUCCESS / FAILED
5309  **/
5310 static int ipr_cancel_op(struct scsi_cmnd *scsi_cmd)
5311 {
5312         struct ipr_cmnd *ipr_cmd;
5313         struct ipr_ioa_cfg *ioa_cfg;
5314         struct ipr_resource_entry *res;
5315         struct ipr_cmd_pkt *cmd_pkt;
5316         u32 ioasc, int_reg;
5317         int op_found = 0;
5318         struct ipr_hrr_queue *hrrq;
5319 
5320         ENTER;
5321         ioa_cfg = (struct ipr_ioa_cfg *)scsi_cmd->device->host->hostdata;
5322         res = scsi_cmd->device->hostdata;
5323 
5324         /* If we are currently going through reset/reload, return failed.
5325          * This will force the mid-layer to call ipr_eh_host_reset,
5326          * which will then go to sleep and wait for the reset to complete
5327          */
5328         if (ioa_cfg->in_reset_reload ||
5329             ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
5330                 return FAILED;
5331         if (!res)
5332                 return FAILED;
5333 
5334         /*
5335          * If we are aborting a timed out op, chances are that the timeout was caused
5336          * by a still not detected EEH error. In such cases, reading a register will
5337          * trigger the EEH recovery infrastructure.
5338          */
5339         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
5340 
5341         if (!ipr_is_gscsi(res))
5342                 return FAILED;
5343 
5344         for_each_hrrq(hrrq, ioa_cfg) {
5345                 spin_lock(&hrrq->_lock);
5346                 list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
5347                         if (ipr_cmd->scsi_cmd == scsi_cmd) {
5348                                 ipr_cmd->done = ipr_scsi_eh_done;
5349                                 op_found = 1;
5350                                 break;
5351                         }
5352                 }
5353                 spin_unlock(&hrrq->_lock);
5354         }
5355 
5356         if (!op_found)
5357                 return SUCCESS;
5358 
5359         ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
5360         ipr_cmd->ioarcb.res_handle = res->res_handle;
5361         cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5362         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5363         cmd_pkt->cdb[0] = IPR_CANCEL_ALL_REQUESTS;
5364         ipr_cmd->u.sdev = scsi_cmd->device;
5365 
5366         scmd_printk(KERN_ERR, scsi_cmd, "Aborting command: %02X\n",
5367                     scsi_cmd->cmnd[0]);
5368         ipr_send_blocking_cmd(ipr_cmd, ipr_abort_timeout, IPR_CANCEL_ALL_TIMEOUT);
5369         ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5370 
5371         /*
5372          * If the abort task timed out and we sent a bus reset, we will get
5373          * one the following responses to the abort
5374          */
5375         if (ioasc == IPR_IOASC_BUS_WAS_RESET || ioasc == IPR_IOASC_SYNC_REQUIRED) {
5376                 ioasc = 0;
5377                 ipr_trace;
5378         }
5379 
5380         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5381         if (!ipr_is_naca_model(res))
5382                 res->needs_sync_complete = 1;
5383 
5384         LEAVE;
5385         return IPR_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
5386 }
5387 
5388 /**
5389  * ipr_eh_abort - Abort a single op
5390  * @scsi_cmd:   scsi command struct
5391  *
5392  * Return value:
5393  *      0 if scan in progress / 1 if scan is complete
5394  **/
5395 static int ipr_scan_finished(struct Scsi_Host *shost, unsigned long elapsed_time)
5396 {
5397         unsigned long lock_flags;
5398         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
5399         int rc = 0;
5400 
5401         spin_lock_irqsave(shost->host_lock, lock_flags);
5402         if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead || ioa_cfg->scan_done)
5403                 rc = 1;
5404         if ((elapsed_time/HZ) > (ioa_cfg->transop_timeout * 2))
5405                 rc = 1;
5406         spin_unlock_irqrestore(shost->host_lock, lock_flags);
5407         return rc;
5408 }
5409 
5410 /**
5411  * ipr_eh_host_reset - Reset the host adapter
5412  * @scsi_cmd:   scsi command struct
5413  *
5414  * Return value:
5415  *      SUCCESS / FAILED
5416  **/
5417 static int ipr_eh_abort(struct scsi_cmnd *scsi_cmd)
5418 {
5419         unsigned long flags;
5420         int rc;
5421         struct ipr_ioa_cfg *ioa_cfg;
5422 
5423         ENTER;
5424 
5425         ioa_cfg = (struct ipr_ioa_cfg *) scsi_cmd->device->host->hostdata;
5426 
5427         spin_lock_irqsave(scsi_cmd->device->host->host_lock, flags);
5428         rc = ipr_cancel_op(scsi_cmd);
5429         spin_unlock_irqrestore(scsi_cmd->device->host->host_lock, flags);
5430 
5431         if (rc == SUCCESS)
5432                 rc = ipr_wait_for_ops(ioa_cfg, scsi_cmd->device, ipr_match_lun);
5433         LEAVE;
5434         return rc;
5435 }
5436 
5437 /**
5438  * ipr_handle_other_interrupt - Handle "other" interrupts
5439  * @ioa_cfg:    ioa config struct
5440  * @int_reg:    interrupt register
5441  *
5442  * Return value:
5443  *      IRQ_NONE / IRQ_HANDLED
5444  **/
5445 static irqreturn_t ipr_handle_other_interrupt(struct ipr_ioa_cfg *ioa_cfg,
5446                                               u32 int_reg)
5447 {
5448         irqreturn_t rc = IRQ_HANDLED;
5449         u32 int_mask_reg;
5450 
5451         int_mask_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg32);
5452         int_reg &= ~int_mask_reg;
5453 
5454         /* If an interrupt on the adapter did not occur, ignore it.
5455          * Or in the case of SIS 64, check for a stage change interrupt.
5456          */
5457         if ((int_reg & IPR_PCII_OPER_INTERRUPTS) == 0) {
5458                 if (ioa_cfg->sis64) {
5459                         int_mask_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
5460                         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg) & ~int_mask_reg;
5461                         if (int_reg & IPR_PCII_IPL_STAGE_CHANGE) {
5462 
5463                                 /* clear stage change */
5464                                 writel(IPR_PCII_IPL_STAGE_CHANGE, ioa_cfg->regs.clr_interrupt_reg);
5465                                 int_reg = readl(ioa_cfg->regs.sense_interrupt_reg) & ~int_mask_reg;
5466                                 list_del(&ioa_cfg->reset_cmd->queue);
5467                                 del_timer(&ioa_cfg->reset_cmd->timer);
5468                                 ipr_reset_ioa_job(ioa_cfg->reset_cmd);
5469                                 return IRQ_HANDLED;
5470                         }
5471                 }
5472 
5473                 return IRQ_NONE;
5474         }
5475 
5476         if (int_reg & IPR_PCII_IOA_TRANS_TO_OPER) {
5477                 /* Mask the interrupt */
5478                 writel(IPR_PCII_IOA_TRANS_TO_OPER, ioa_cfg->regs.set_interrupt_mask_reg);
5479                 int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
5480 
5481                 list_del(&ioa_cfg->reset_cmd->queue);
5482                 del_timer(&ioa_cfg->reset_cmd->timer);
5483                 ipr_reset_ioa_job(ioa_cfg->reset_cmd);
5484         } else if ((int_reg & IPR_PCII_HRRQ_UPDATED) == int_reg) {
5485                 if (ioa_cfg->clear_isr) {
5486                         if (ipr_debug && printk_ratelimit())
5487                                 dev_err(&ioa_cfg->pdev->dev,
5488                                         "Spurious interrupt detected. 0x%08X\n", int_reg);
5489                         writel(IPR_PCII_HRRQ_UPDATED, ioa_cfg->regs.clr_interrupt_reg32);
5490                         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5491                         return IRQ_NONE;
5492                 }
5493         } else {
5494                 if (int_reg & IPR_PCII_IOA_UNIT_CHECKED)
5495                         ioa_cfg->ioa_unit_checked = 1;
5496                 else if (int_reg & IPR_PCII_NO_HOST_RRQ)
5497                         dev_err(&ioa_cfg->pdev->dev,
5498                                 "No Host RRQ. 0x%08X\n", int_reg);
5499                 else
5500                         dev_err(&ioa_cfg->pdev->dev,
5501                                 "Permanent IOA failure. 0x%08X\n", int_reg);
5502 
5503                 if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
5504                         ioa_cfg->sdt_state = GET_DUMP;
5505 
5506                 ipr_mask_and_clear_interrupts(ioa_cfg, ~0);
5507                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
5508         }
5509 
5510         return rc;
5511 }
5512 
5513 /**
5514  * ipr_isr_eh - Interrupt service routine error handler
5515  * @ioa_cfg:    ioa config struct
5516  * @msg:        message to log
5517  *
5518  * Return value:
5519  *      none
5520  **/
5521 static void ipr_isr_eh(struct ipr_ioa_cfg *ioa_cfg, char *msg, u16 number)
5522 {
5523         ioa_cfg->errors_logged++;
5524         dev_err(&ioa_cfg->pdev->dev, "%s %d\n", msg, number);
5525 
5526         if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
5527                 ioa_cfg->sdt_state = GET_DUMP;
5528 
5529         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
5530 }
5531 
5532 static int ipr_process_hrrq(struct ipr_hrr_queue *hrr_queue, int budget,
5533                                                 struct list_head *doneq)
5534 {
5535         u32 ioasc;
5536         u16 cmd_index;
5537         struct ipr_cmnd *ipr_cmd;
5538         struct ipr_ioa_cfg *ioa_cfg = hrr_queue->ioa_cfg;
5539         int num_hrrq = 0;
5540 
5541         /* If interrupts are disabled, ignore the interrupt */
5542         if (!hrr_queue->allow_interrupts)
5543                 return 0;
5544 
5545         while ((be32_to_cpu(*hrr_queue->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5546                hrr_queue->toggle_bit) {
5547 
5548                 cmd_index = (be32_to_cpu(*hrr_queue->hrrq_curr) &
5549                              IPR_HRRQ_REQ_RESP_HANDLE_MASK) >>
5550                              IPR_HRRQ_REQ_RESP_HANDLE_SHIFT;
5551 
5552                 if (unlikely(cmd_index > hrr_queue->max_cmd_id ||
5553                              cmd_index < hrr_queue->min_cmd_id)) {
5554                         ipr_isr_eh(ioa_cfg,
5555                                 "Invalid response handle from IOA: ",
5556                                 cmd_index);
5557                         break;
5558                 }
5559 
5560                 ipr_cmd = ioa_cfg->ipr_cmnd_list[cmd_index];
5561                 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5562 
5563                 ipr_trc_hook(ipr_cmd, IPR_TRACE_FINISH, ioasc);
5564 
5565                 list_move_tail(&ipr_cmd->queue, doneq);
5566 
5567                 if (hrr_queue->hrrq_curr < hrr_queue->hrrq_end) {
5568                         hrr_queue->hrrq_curr++;
5569                 } else {
5570                         hrr_queue->hrrq_curr = hrr_queue->hrrq_start;
5571                         hrr_queue->toggle_bit ^= 1u;
5572                 }
5573                 num_hrrq++;
5574                 if (budget > 0 && num_hrrq >= budget)
5575                         break;
5576         }
5577 
5578         return num_hrrq;
5579 }
5580 
5581 static int ipr_iopoll(struct irq_poll *iop, int budget)
5582 {
5583         struct ipr_ioa_cfg *ioa_cfg;
5584         struct ipr_hrr_queue *hrrq;
5585         struct ipr_cmnd *ipr_cmd, *temp;
5586         unsigned long hrrq_flags;
5587         int completed_ops;
5588         LIST_HEAD(doneq);
5589 
5590         hrrq = container_of(iop, struct ipr_hrr_queue, iopoll);
5591         ioa_cfg = hrrq->ioa_cfg;
5592 
5593         spin_lock_irqsave(hrrq->lock, hrrq_flags);
5594         completed_ops = ipr_process_hrrq(hrrq, budget, &doneq);
5595 
5596         if (completed_ops < budget)
5597                 irq_poll_complete(iop);
5598         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5599 
5600         list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5601                 list_del(&ipr_cmd->queue);
5602                 del_timer(&ipr_cmd->timer);
5603                 ipr_cmd->fast_done(ipr_cmd);
5604         }
5605 
5606         return completed_ops;
5607 }
5608 
5609 /**
5610  * ipr_isr - Interrupt service routine
5611  * @irq:        irq number
5612  * @devp:       pointer to ioa config struct
5613  *
5614  * Return value:
5615  *      IRQ_NONE / IRQ_HANDLED
5616  **/
5617 static irqreturn_t ipr_isr(int irq, void *devp)
5618 {
5619         struct ipr_hrr_queue *hrrq = (struct ipr_hrr_queue *)devp;
5620         struct ipr_ioa_cfg *ioa_cfg = hrrq->ioa_cfg;
5621         unsigned long hrrq_flags = 0;
5622         u32 int_reg = 0;
5623         int num_hrrq = 0;
5624         int irq_none = 0;
5625         struct ipr_cmnd *ipr_cmd, *temp;
5626         irqreturn_t rc = IRQ_NONE;
5627         LIST_HEAD(doneq);
5628 
5629         spin_lock_irqsave(hrrq->lock, hrrq_flags);
5630         /* If interrupts are disabled, ignore the interrupt */
5631         if (!hrrq->allow_interrupts) {
5632                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5633                 return IRQ_NONE;
5634         }
5635 
5636         while (1) {
5637                 if (ipr_process_hrrq(hrrq, -1, &doneq)) {
5638                         rc =  IRQ_HANDLED;
5639 
5640                         if (!ioa_cfg->clear_isr)
5641                                 break;
5642 
5643                         /* Clear the PCI interrupt */
5644                         num_hrrq = 0;
5645                         do {
5646                                 writel(IPR_PCII_HRRQ_UPDATED,
5647                                      ioa_cfg->regs.clr_interrupt_reg32);
5648                                 int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5649                         } while (int_reg & IPR_PCII_HRRQ_UPDATED &&
5650                                 num_hrrq++ < IPR_MAX_HRRQ_RETRIES);
5651 
5652                 } else if (rc == IRQ_NONE && irq_none == 0) {
5653                         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5654                         irq_none++;
5655                 } else if (num_hrrq == IPR_MAX_HRRQ_RETRIES &&
5656                            int_reg & IPR_PCII_HRRQ_UPDATED) {
5657                         ipr_isr_eh(ioa_cfg,
5658                                 "Error clearing HRRQ: ", num_hrrq);
5659                         rc = IRQ_HANDLED;
5660                         break;
5661                 } else
5662                         break;
5663         }
5664 
5665         if (unlikely(rc == IRQ_NONE))
5666                 rc = ipr_handle_other_interrupt(ioa_cfg, int_reg);
5667 
5668         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5669         list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5670                 list_del(&ipr_cmd->queue);
5671                 del_timer(&ipr_cmd->timer);
5672                 ipr_cmd->fast_done(ipr_cmd);
5673         }
5674         return rc;
5675 }
5676 
5677 /**
5678  * ipr_isr_mhrrq - Interrupt service routine
5679  * @irq:        irq number
5680  * @devp:       pointer to ioa config struct
5681  *
5682  * Return value:
5683  *      IRQ_NONE / IRQ_HANDLED
5684  **/
5685 static irqreturn_t ipr_isr_mhrrq(int irq, void *devp)
5686 {
5687         struct ipr_hrr_queue *hrrq = (struct ipr_hrr_queue *)devp;
5688         struct ipr_ioa_cfg *ioa_cfg = hrrq->ioa_cfg;
5689         unsigned long hrrq_flags = 0;
5690         struct ipr_cmnd *ipr_cmd, *temp;
5691         irqreturn_t rc = IRQ_NONE;
5692         LIST_HEAD(doneq);
5693 
5694         spin_lock_irqsave(hrrq->lock, hrrq_flags);
5695 
5696         /* If interrupts are disabled, ignore the interrupt */
5697         if (!hrrq->allow_interrupts) {
5698                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5699                 return IRQ_NONE;
5700         }
5701 
5702         if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
5703                 if ((be32_to_cpu(*hrrq->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5704                        hrrq->toggle_bit) {
5705                         irq_poll_sched(&hrrq->iopoll);
5706                         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5707                         return IRQ_HANDLED;
5708                 }
5709         } else {
5710                 if ((be32_to_cpu(*hrrq->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5711                         hrrq->toggle_bit)
5712 
5713                         if (ipr_process_hrrq(hrrq, -1, &doneq))
5714                                 rc =  IRQ_HANDLED;
5715         }
5716 
5717         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5718 
5719         list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5720                 list_del(&ipr_cmd->queue);
5721                 del_timer(&ipr_cmd->timer);
5722                 ipr_cmd->fast_done(ipr_cmd);
5723         }
5724         return rc;
5725 }
5726 
5727 /**
5728  * ipr_build_ioadl64 - Build a scatter/gather list and map the buffer
5729  * @ioa_cfg:    ioa config struct
5730  * @ipr_cmd:    ipr command struct
5731  *
5732  * Return value:
5733  *      0 on success / -1 on failure
5734  **/
5735 static int ipr_build_ioadl64(struct ipr_ioa_cfg *ioa_cfg,
5736                              struct ipr_cmnd *ipr_cmd)
5737 {
5738         int i, nseg;
5739         struct scatterlist *sg;
5740         u32 length;
5741         u32 ioadl_flags = 0;
5742         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5743         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5744         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
5745 
5746         length = scsi_bufflen(scsi_cmd);
5747         if (!length)
5748                 return 0;
5749 
5750         nseg = scsi_dma_map(scsi_cmd);
5751         if (nseg < 0) {
5752                 if (printk_ratelimit())
5753                         dev_err(&ioa_cfg->pdev->dev, "scsi_dma_map failed!\n");
5754                 return -1;
5755         }
5756 
5757         ipr_cmd->dma_use_sg = nseg;
5758 
5759         ioarcb->data_transfer_length = cpu_to_be32(length);
5760         ioarcb->ioadl_len =
5761                 cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
5762 
5763         if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) {
5764                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
5765                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
5766         } else if (scsi_cmd->sc_data_direction == DMA_FROM_DEVICE)
5767                 ioadl_flags = IPR_IOADL_FLAGS_READ;
5768 
5769         scsi_for_each_sg(scsi_cmd, sg, ipr_cmd->dma_use_sg, i) {
5770                 ioadl64[i].flags = cpu_to_be32(ioadl_flags);
5771                 ioadl64[i].data_len = cpu_to_be32(sg_dma_len(sg));
5772                 ioadl64[i].address = cpu_to_be64(sg_dma_address(sg));
5773         }
5774 
5775         ioadl64[i-1].flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
5776         return 0;
5777 }
5778 
5779 /**
5780  * ipr_build_ioadl - Build a scatter/gather list and map the buffer
5781  * @ioa_cfg:    ioa config struct
5782  * @ipr_cmd:    ipr command struct
5783  *
5784  * Return value:
5785  *      0 on success / -1 on failure
5786  **/
5787 static int ipr_build_ioadl(struct ipr_ioa_cfg *ioa_cfg,
5788                            struct ipr_cmnd *ipr_cmd)
5789 {
5790         int i, nseg;
5791         struct scatterlist *sg;
5792         u32 length;
5793         u32 ioadl_flags = 0;
5794         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5795         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5796         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
5797 
5798         length = scsi_bufflen(scsi_cmd);
5799         if (!length)
5800                 return 0;
5801 
5802         nseg = scsi_dma_map(scsi_cmd);
5803         if (nseg < 0) {
5804                 dev_err(&ioa_cfg->pdev->dev, "scsi_dma_map failed!\n");
5805                 return -1;
5806         }
5807 
5808         ipr_cmd->dma_use_sg = nseg;
5809 
5810         if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) {
5811                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
5812                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
5813                 ioarcb->data_transfer_length = cpu_to_be32(length);
5814                 ioarcb->ioadl_len =
5815                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
5816         } else if (scsi_cmd->sc_data_direction == DMA_FROM_DEVICE) {
5817                 ioadl_flags = IPR_IOADL_FLAGS_READ;
5818                 ioarcb->read_data_transfer_length = cpu_to_be32(length);
5819                 ioarcb->read_ioadl_len =
5820                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
5821         }
5822 
5823         if (ipr_cmd->dma_use_sg <= ARRAY_SIZE(ioarcb->u.add_data.u.ioadl)) {
5824                 ioadl = ioarcb->u.add_data.u.ioadl;
5825                 ioarcb->write_ioadl_addr = cpu_to_be32((ipr_cmd->dma_addr) +
5826                                     offsetof(struct ipr_ioarcb, u.add_data));
5827                 ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
5828         }
5829 
5830         scsi_for_each_sg(scsi_cmd, sg, ipr_cmd->dma_use_sg, i) {
5831                 ioadl[i].flags_and_data_len =
5832                         cpu_to_be32(ioadl_flags | sg_dma_len(sg));
5833                 ioadl[i].address = cpu_to_be32(sg_dma_address(sg));
5834         }
5835 
5836         ioadl[i-1].flags_and_data_len |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
5837         return 0;
5838 }
5839 
5840 /**
5841  * ipr_erp_done - Process completion of ERP for a device
5842  * @ipr_cmd:            ipr command struct
5843  *
5844  * This function copies the sense buffer into the scsi_cmd
5845  * struct and pushes the scsi_done function.
5846  *
5847  * Return value:
5848  *      nothing
5849  **/
5850 static void ipr_erp_done(struct ipr_cmnd *ipr_cmd)
5851 {
5852         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5853         struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
5854         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5855 
5856         if (IPR_IOASC_SENSE_KEY(ioasc) > 0) {
5857                 scsi_cmd->result |= (DID_ERROR << 16);
5858                 scmd_printk(KERN_ERR, scsi_cmd,
5859                             "Request Sense failed with IOASC: 0x%08X\n", ioasc);
5860         } else {
5861                 memcpy(scsi_cmd->sense_buffer, ipr_cmd->sense_buffer,
5862                        SCSI_SENSE_BUFFERSIZE);
5863         }
5864 
5865         if (res) {
5866                 if (!ipr_is_naca_model(res))
5867                         res->needs_sync_complete = 1;
5868                 res->in_erp = 0;
5869         }
5870         scsi_dma_unmap(ipr_cmd->scsi_cmd);
5871         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5872         scsi_cmd->scsi_done(scsi_cmd);
5873 }
5874 
5875 /**
5876  * ipr_reinit_ipr_cmnd_for_erp - Re-initialize a cmnd block to be used for ERP
5877  * @ipr_cmd:    ipr command struct
5878  *
5879  * Return value:
5880  *      none
5881  **/
5882 static void ipr_reinit_ipr_cmnd_for_erp(struct ipr_cmnd *ipr_cmd)
5883 {
5884         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5885         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
5886         dma_addr_t dma_addr = ipr_cmd->dma_addr;
5887 
5888         memset(&ioarcb->cmd_pkt, 0, sizeof(struct ipr_cmd_pkt));
5889         ioarcb->data_transfer_length = 0;
5890         ioarcb->read_data_transfer_length = 0;
5891         ioarcb->ioadl_len = 0;
5892         ioarcb->read_ioadl_len = 0;
5893         ioasa->hdr.ioasc = 0;
5894         ioasa->hdr.residual_data_len = 0;
5895 
5896         if (ipr_cmd->ioa_cfg->sis64)
5897                 ioarcb->u.sis64_addr_data.data_ioadl_addr =
5898                         cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ioadl64));
5899         else {
5900                 ioarcb->write_ioadl_addr =
5901                         cpu_to_be32(dma_addr + offsetof(struct ipr_cmnd, i.ioadl));
5902                 ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
5903         }
5904 }
5905 
5906 /**
5907  * ipr_erp_request_sense - Send request sense to a device
5908  * @ipr_cmd:    ipr command struct
5909  *
5910  * This function sends a request sense to a device as a result
5911  * of a check condition.
5912  *
5913  * Return value:
5914  *      nothing
5915  **/
5916 static void ipr_erp_request_sense(struct ipr_cmnd *ipr_cmd)
5917 {
5918         struct ipr_cmd_pkt *cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5919         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5920 
5921         if (IPR_IOASC_SENSE_KEY(ioasc) > 0) {
5922                 ipr_erp_done(ipr_cmd);
5923                 return;
5924         }
5925 
5926         ipr_reinit_ipr_cmnd_for_erp(ipr_cmd);
5927 
5928         cmd_pkt->request_type = IPR_RQTYPE_SCSICDB;
5929         cmd_pkt->cdb[0] = REQUEST_SENSE;
5930         cmd_pkt->cdb[4] = SCSI_SENSE_BUFFERSIZE;
5931         cmd_pkt->flags_hi |= IPR_FLAGS_HI_SYNC_OVERRIDE;
5932         cmd_pkt->flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
5933         cmd_pkt->timeout = cpu_to_be16(IPR_REQUEST_SENSE_TIMEOUT / HZ);
5934 
5935         ipr_init_ioadl(ipr_cmd, ipr_cmd->sense_buffer_dma,
5936                        SCSI_SENSE_BUFFERSIZE, IPR_IOADL_FLAGS_READ_LAST);
5937 
5938         ipr_do_req(ipr_cmd, ipr_erp_done, ipr_timeout,
5939                    IPR_REQUEST_SENSE_TIMEOUT * 2);
5940 }
5941 
5942 /**
5943  * ipr_erp_cancel_all - Send cancel all to a device
5944  * @ipr_cmd:    ipr command struct
5945  *
5946  * This function sends a cancel all to a device to clear the
5947  * queue. If we are running TCQ on the device, QERR is set to 1,
5948  * which means all outstanding ops have been dropped on the floor.
5949  * Cancel all will return them to us.
5950  *
5951  * Return value:
5952  *      nothing
5953  **/
5954 static void ipr_erp_cancel_all(struct ipr_cmnd *ipr_cmd)
5955 {
5956         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5957         struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
5958         struct ipr_cmd_pkt *cmd_pkt;
5959 
5960         res->in_erp = 1;
5961 
5962         ipr_reinit_ipr_cmnd_for_erp(ipr_cmd);
5963 
5964         if (!scsi_cmd->device->simple_tags) {
5965                 ipr_erp_request_sense(ipr_cmd);
5966                 return;
5967         }
5968 
5969         cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5970         cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5971         cmd_pkt->cdb[0] = IPR_CANCEL_ALL_REQUESTS;
5972 
5973         ipr_do_req(ipr_cmd, ipr_erp_request_sense, ipr_timeout,
5974                    IPR_CANCEL_ALL_TIMEOUT);
5975 }
5976 
5977 /**
5978  * ipr_dump_ioasa - Dump contents of IOASA
5979  * @ioa_cfg:    ioa config struct
5980  * @ipr_cmd:    ipr command struct
5981  * @res:                resource entry struct
5982  *
5983  * This function is invoked by the interrupt handler when ops
5984  * fail. It will log the IOASA if appropriate. Only called
5985  * for GPDD ops.
5986  *
5987  * Return value:
5988  *      none
5989  **/
5990 static void ipr_dump_ioasa(struct ipr_ioa_cfg *ioa_cfg,
5991                            struct ipr_cmnd *ipr_cmd, struct ipr_resource_entry *res)
5992 {
5993         int i;
5994         u16 data_len;
5995         u32 ioasc, fd_ioasc;
5996         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
5997         __be32 *ioasa_data = (__be32 *)ioasa;
5998         int error_index;
5999 
6000         ioasc = be32_to_cpu(ioasa->hdr.ioasc) & IPR_IOASC_IOASC_MASK;
6001         fd_ioasc = be32_to_cpu(ioasa->hdr.fd_ioasc) & IPR_IOASC_IOASC_MASK;
6002 
6003         if (0 == ioasc)
6004                 return;
6005 
6006         if (ioa_cfg->log_level < IPR_DEFAULT_LOG_LEVEL)
6007                 return;
6008 
6009         if (ioasc == IPR_IOASC_BUS_WAS_RESET && fd_ioasc)
6010                 error_index = ipr_get_error(fd_ioasc);
6011         else
6012                 error_index = ipr_get_error(ioasc);
6013 
6014         if (ioa_cfg->log_level < IPR_MAX_LOG_LEVEL) {
6015                 /* Don't log an error if the IOA already logged one */
6016                 if (ioasa->hdr.ilid != 0)
6017                         return;
6018 
6019                 if (!ipr_is_gscsi(res))
6020                         return;
6021 
6022                 if (ipr_error_table[error_index].log_ioasa == 0)
6023                         return;
6024         }
6025 
6026         ipr_res_err(ioa_cfg, res, "%s\n", ipr_error_table[error_index].error);
6027 
6028         data_len = be16_to_cpu(ioasa->hdr.ret_stat_len);
6029         if (ioa_cfg->sis64 && sizeof(struct ipr_ioasa64) < data_len)
6030                 data_len = sizeof(struct ipr_ioasa64);
6031         else if (!ioa_cfg->sis64 && sizeof(struct ipr_ioasa) < data_len)
6032                 data_len = sizeof(struct ipr_ioasa);
6033 
6034         ipr_err("IOASA Dump:\n");
6035 
6036         for (i = 0; i < data_len / 4; i += 4) {
6037                 ipr_err("%08X: %08X %08X %08X %08X\n", i*4,
6038                         be32_to_cpu(ioasa_data[i]),
6039                         be32_to_cpu(ioasa_data[i+1]),
6040                         be32_to_cpu(ioasa_data[i+2]),
6041                         be32_to_cpu(ioasa_data[i+3]));
6042         }
6043 }
6044 
6045 /**
6046  * ipr_gen_sense - Generate SCSI sense data from an IOASA
6047  * @ioasa:              IOASA
6048  * @sense_buf:  sense data buffer
6049  *
6050  * Return value:
6051  *      none
6052  **/
6053 static void ipr_gen_sense(struct ipr_cmnd *ipr_cmd)
6054 {
6055         u32 failing_lba;
6056         u8 *sense_buf = ipr_cmd->scsi_cmd->sense_buffer;
6057         struct ipr_resource_entry *res = ipr_cmd->scsi_cmd->device->hostdata;
6058         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
6059         u32 ioasc = be32_to_cpu(ioasa->hdr.ioasc);
6060 
6061         memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
6062 
6063         if (ioasc >= IPR_FIRST_DRIVER_IOASC)
6064                 return;
6065 
6066         ipr_cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
6067 
6068         if (ipr_is_vset_device(res) &&
6069             ioasc == IPR_IOASC_MED_DO_NOT_REALLOC &&
6070             ioasa->u.vset.failing_lba_hi != 0) {
6071                 sense_buf[0] = 0x72;
6072                 sense_buf[1] = IPR_IOASC_SENSE_KEY(ioasc);
6073                 sense_buf[2] = IPR_IOASC_SENSE_CODE(ioasc);
6074                 sense_buf[3] = IPR_IOASC_SENSE_QUAL(ioasc);
6075 
6076                 sense_buf[7] = 12;
6077                 sense_buf[8] = 0;
6078                 sense_buf[9] = 0x0A;
6079                 sense_buf[10] = 0x80;
6080 
6081                 failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_hi);
6082 
6083                 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
6084                 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
6085                 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
6086                 sense_buf[15] = failing_lba & 0x000000ff;
6087 
6088                 failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_lo);
6089 
6090                 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
6091                 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
6092                 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
6093                 sense_buf[19] = failing_lba & 0x000000ff;
6094         } else {
6095                 sense_buf[0] = 0x70;
6096                 sense_buf[2] = IPR_IOASC_SENSE_KEY(ioasc);
6097                 sense_buf[12] = IPR_IOASC_SENSE_CODE(ioasc);
6098                 sense_buf[13] = IPR_IOASC_SENSE_QUAL(ioasc);
6099 
6100                 /* Illegal request */
6101                 if ((IPR_IOASC_SENSE_KEY(ioasc) == 0x05) &&
6102                     (be32_to_cpu(ioasa->hdr.ioasc_specific) & IPR_FIELD_POINTER_VALID)) {
6103                         sense_buf[7] = 10;      /* additional length */
6104 
6105                         /* IOARCB was in error */
6106                         if (IPR_IOASC_SENSE_CODE(ioasc) == 0x24)
6107                                 sense_buf[15] = 0xC0;
6108                         else    /* Parameter data was invalid */
6109                                 sense_buf[15] = 0x80;
6110 
6111                         sense_buf[16] =
6112                             ((IPR_FIELD_POINTER_MASK &
6113                               be32_to_cpu(ioasa->hdr.ioasc_specific)) >> 8) & 0xff;
6114                         sense_buf[17] =
6115                             (IPR_FIELD_POINTER_MASK &
6116                              be32_to_cpu(ioasa->hdr.ioasc_specific)) & 0xff;
6117                 } else {
6118                         if (ioasc == IPR_IOASC_MED_DO_NOT_REALLOC) {
6119                                 if (ipr_is_vset_device(res))
6120                                         failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_lo);
6121                                 else
6122                                         failing_lba = be32_to_cpu(ioasa->u.dasd.failing_lba);
6123 
6124                                 sense_buf[0] |= 0x80;   /* Or in the Valid bit */
6125                                 sense_buf[3] = (failing_lba & 0xff000000) >> 24;
6126                                 sense_buf[4] = (failing_lba & 0x00ff0000) >> 16;
6127                                 sense_buf[5] = (failing_lba & 0x0000ff00) >> 8;
6128                                 sense_buf[6] = failing_lba & 0x000000ff;
6129                         }
6130 
6131                         sense_buf[7] = 6;       /* additional length */
6132                 }
6133         }
6134 }
6135 
6136 /**
6137  * ipr_get_autosense - Copy autosense data to sense buffer
6138  * @ipr_cmd:    ipr command struct
6139  *
6140  * This function copies the autosense buffer to the buffer
6141  * in the scsi_cmd, if there is autosense available.
6142  *
6143  * Return value:
6144  *      1 if autosense was available / 0 if not
6145  **/
6146 static int ipr_get_autosense(struct ipr_cmnd *ipr_cmd)
6147 {
6148         struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
6149         struct ipr_ioasa64 *ioasa64 = &ipr_cmd->s.ioasa64;
6150 
6151         if ((be32_to_cpu(ioasa->hdr.ioasc_specific) & IPR_AUTOSENSE_VALID) == 0)
6152                 return 0;
6153 
6154         if (ipr_cmd->ioa_cfg->sis64)
6155                 memcpy(ipr_cmd->scsi_cmd->sense_buffer, ioasa64->auto_sense.data,
6156                        min_t(u16, be16_to_cpu(ioasa64->auto_sense.auto_sense_len),
6157                            SCSI_SENSE_BUFFERSIZE));
6158         else
6159                 memcpy(ipr_cmd->scsi_cmd->sense_buffer, ioasa->auto_sense.data,
6160                        min_t(u16, be16_to_cpu(ioasa->auto_sense.auto_sense_len),
6161                            SCSI_SENSE_BUFFERSIZE));
6162         return 1;
6163 }
6164 
6165 /**
6166  * ipr_erp_start - Process an error response for a SCSI op
6167  * @ioa_cfg:    ioa config struct
6168  * @ipr_cmd:    ipr command struct
6169  *
6170  * This function determines whether or not to initiate ERP
6171  * on the affected device.
6172  *
6173  * Return value:
6174  *      nothing
6175  **/
6176 static void ipr_erp_start(struct ipr_ioa_cfg *ioa_cfg,
6177                               struct ipr_cmnd *ipr_cmd)
6178 {
6179         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
6180         struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
6181         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
6182         u32 masked_ioasc = ioasc & IPR_IOASC_IOASC_MASK;
6183 
6184         if (!res) {
6185                 ipr_scsi_eh_done(ipr_cmd);
6186                 return;
6187         }
6188 
6189         if (!ipr_is_gscsi(res) && masked_ioasc != IPR_IOASC_HW_DEV_BUS_STATUS)
6190                 ipr_gen_sense(ipr_cmd);
6191 
6192         ipr_dump_ioasa(ioa_cfg, ipr_cmd, res);
6193 
6194         switch (masked_ioasc) {
6195         case IPR_IOASC_ABORTED_CMD_TERM_BY_HOST:
6196                 if (ipr_is_naca_model(res))
6197                         scsi_cmd->result |= (DID_ABORT << 16);
6198                 else
6199                         scsi_cmd->result |= (DID_IMM_RETRY << 16);
6200                 break;
6201         case IPR_IOASC_IR_RESOURCE_HANDLE:
6202         case IPR_IOASC_IR_NO_CMDS_TO_2ND_IOA:
6203                 scsi_cmd->result |= (DID_NO_CONNECT << 16);
6204                 break;
6205         case IPR_IOASC_HW_SEL_TIMEOUT:
6206                 scsi_cmd->result |= (DID_NO_CONNECT << 16);
6207                 if (!ipr_is_naca_model(res))
6208                         res->needs_sync_complete = 1;
6209                 break;
6210         case IPR_IOASC_SYNC_REQUIRED:
6211                 if (!res->in_erp)
6212                         res->needs_sync_complete = 1;
6213                 scsi_cmd->result |= (DID_IMM_RETRY << 16);
6214                 break;
6215         case IPR_IOASC_MED_DO_NOT_REALLOC: /* prevent retries */
6216         case IPR_IOASA_IR_DUAL_IOA_DISABLED:
6217                 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
6218                 break;
6219         case IPR_IOASC_BUS_WAS_RESET:
6220         case IPR_IOASC_BUS_WAS_RESET_BY_OTHER:
6221                 /*
6222                  * Report the bus reset and ask for a retry. The device
6223                  * will give CC/UA the next command.
6224                  */
6225                 if (!res->resetting_device)
6226                         scsi_report_bus_reset(ioa_cfg->host, scsi_cmd->device->channel);
6227                 scsi_cmd->result |= (DID_ERROR << 16);
6228                 if (!ipr_is_naca_model(res))
6229                         res->needs_sync_complete = 1;
6230                 break;
6231         case IPR_IOASC_HW_DEV_BUS_STATUS:
6232                 scsi_cmd->result |= IPR_IOASC_SENSE_STATUS(ioasc);
6233                 if (IPR_IOASC_SENSE_STATUS(ioasc) == SAM_STAT_CHECK_CONDITION) {
6234                         if (!ipr_get_autosense(ipr_cmd)) {
6235                                 if (!ipr_is_naca_model(res)) {
6236                                         ipr_erp_cancel_all(ipr_cmd);
6237                                         return;
6238                                 }
6239                         }
6240                 }
6241                 if (!ipr_is_naca_model(res))
6242                         res->needs_sync_complete = 1;
6243                 break;
6244         case IPR_IOASC_NR_INIT_CMD_REQUIRED:
6245                 break;
6246         case IPR_IOASC_IR_NON_OPTIMIZED:
6247                 if (res->raw_mode) {
6248                         res->raw_mode = 0;
6249                         scsi_cmd->result |= (DID_IMM_RETRY << 16);
6250                 } else
6251                         scsi_cmd->result |= (DID_ERROR << 16);
6252                 break;
6253         default:
6254                 if (IPR_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
6255                         scsi_cmd->result |= (DID_ERROR << 16);
6256                 if (!ipr_is_vset_device(res) && !ipr_is_naca_model(res))
6257                         res->needs_sync_complete = 1;
6258                 break;
6259         }
6260 
6261         scsi_dma_unmap(ipr_cmd->scsi_cmd);
6262         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6263         scsi_cmd->scsi_done(scsi_cmd);
6264 }
6265 
6266 /**
6267  * ipr_scsi_done - mid-layer done function
6268  * @ipr_cmd:    ipr command struct
6269  *
6270  * This function is invoked by the interrupt handler for
6271  * ops generated by the SCSI mid-layer
6272  *
6273  * Return value:
6274  *      none
6275  **/
6276 static void ipr_scsi_done(struct ipr_cmnd *ipr_cmd)
6277 {
6278         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6279         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
6280         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
6281         unsigned long lock_flags;
6282 
6283         scsi_set_resid(scsi_cmd, be32_to_cpu(ipr_cmd->s.ioasa.hdr.residual_data_len));
6284 
6285         if (likely(IPR_IOASC_SENSE_KEY(ioasc) == 0)) {
6286                 scsi_dma_unmap(scsi_cmd);
6287 
6288                 spin_lock_irqsave(ipr_cmd->hrrq->lock, lock_flags);
6289                 list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6290                 scsi_cmd->scsi_done(scsi_cmd);
6291                 spin_unlock_irqrestore(ipr_cmd->hrrq->lock, lock_flags);
6292         } else {
6293                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
6294                 spin_lock(&ipr_cmd->hrrq->_lock);
6295                 ipr_erp_start(ioa_cfg, ipr_cmd);
6296                 spin_unlock(&ipr_cmd->hrrq->_lock);
6297                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
6298         }
6299 }
6300 
6301 /**
6302  * ipr_queuecommand - Queue a mid-layer request
6303  * @shost:              scsi host struct
6304  * @scsi_cmd:   scsi command struct
6305  *
6306  * This function queues a request generated by the mid-layer.
6307  *
6308  * Return value:
6309  *      0 on success
6310  *      SCSI_MLQUEUE_DEVICE_BUSY if device is busy
6311  *      SCSI_MLQUEUE_HOST_BUSY if host is busy
6312  **/
6313 static int ipr_queuecommand(struct Scsi_Host *shost,
6314                             struct scsi_cmnd *scsi_cmd)
6315 {
6316         struct ipr_ioa_cfg *ioa_cfg;
6317         struct ipr_resource_entry *res;
6318         struct ipr_ioarcb *ioarcb;
6319         struct ipr_cmnd *ipr_cmd;
6320         unsigned long hrrq_flags, lock_flags;
6321         int rc;
6322         struct ipr_hrr_queue *hrrq;
6323         int hrrq_id;
6324 
6325         ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
6326 
6327         scsi_cmd->result = (DID_OK << 16);
6328         res = scsi_cmd->device->hostdata;
6329 
6330         if (ipr_is_gata(res) && res->sata_port) {
6331                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
6332                 rc = ata_sas_queuecmd(scsi_cmd, res->sata_port->ap);
6333                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
6334                 return rc;
6335         }
6336 
6337         hrrq_id = ipr_get_hrrq_index(ioa_cfg);
6338         hrrq = &ioa_cfg->hrrq[hrrq_id];
6339 
6340         spin_lock_irqsave(hrrq->lock, hrrq_flags);
6341         /*
6342          * We are currently blocking all devices due to a host reset
6343          * We have told the host to stop giving us new requests, but
6344          * ERP ops don't count. FIXME
6345          */
6346         if (unlikely(!hrrq->allow_cmds && !hrrq->ioa_is_dead && !hrrq->removing_ioa)) {
6347                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6348                 return SCSI_MLQUEUE_HOST_BUSY;
6349         }
6350 
6351         /*
6352          * FIXME - Create scsi_set_host_offline interface
6353          *  and the ioa_is_dead check can be removed
6354          */
6355         if (unlikely(hrrq->ioa_is_dead || hrrq->removing_ioa || !res)) {
6356                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6357                 goto err_nodev;
6358         }
6359 
6360         ipr_cmd = __ipr_get_free_ipr_cmnd(hrrq);
6361         if (ipr_cmd == NULL) {
6362                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6363                 return SCSI_MLQUEUE_HOST_BUSY;
6364         }
6365         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6366 
6367         ipr_init_ipr_cmnd(ipr_cmd, ipr_scsi_done);
6368         ioarcb = &ipr_cmd->ioarcb;
6369 
6370         memcpy(ioarcb->cmd_pkt.cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
6371         ipr_cmd->scsi_cmd = scsi_cmd;
6372         ipr_cmd->done = ipr_scsi_eh_done;
6373 
6374         if (ipr_is_gscsi(res)) {
6375                 if (scsi_cmd->underflow == 0)
6376                         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
6377 
6378                 if (res->reset_occurred) {
6379                         res->reset_occurred = 0;
6380                         ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_DELAY_AFTER_RST;
6381                 }
6382         }
6383 
6384         if (ipr_is_gscsi(res) || ipr_is_vset_device(res)) {
6385                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_LINK_DESC;
6386 
6387                 ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_ALIGNED_BFR;
6388                 if (scsi_cmd->flags & SCMD_TAGGED)
6389                         ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_SIMPLE_TASK;
6390                 else
6391                         ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_UNTAGGED_TASK;
6392         }
6393 
6394         if (scsi_cmd->cmnd[0] >= 0xC0 &&
6395             (!ipr_is_gscsi(res) || scsi_cmd->cmnd[0] == IPR_QUERY_RSRC_STATE)) {
6396                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
6397         }
6398         if (res->raw_mode && ipr_is_af_dasd_device(res)) {
6399                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_PIPE;
6400 
6401                 if (scsi_cmd->underflow == 0)
6402                         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
6403         }
6404 
6405         if (ioa_cfg->sis64)
6406                 rc = ipr_build_ioadl64(ioa_cfg, ipr_cmd);
6407         else
6408                 rc = ipr_build_ioadl(ioa_cfg, ipr_cmd);
6409 
6410         spin_lock_irqsave(hrrq->lock, hrrq_flags);
6411         if (unlikely(rc || (!hrrq->allow_cmds && !hrrq->ioa_is_dead))) {
6412                 list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_free_q);
6413                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6414                 if (!rc)
6415                         scsi_dma_unmap(scsi_cmd);
6416                 return SCSI_MLQUEUE_HOST_BUSY;
6417         }
6418 
6419         if (unlikely(hrrq->ioa_is_dead)) {
6420                 list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_free_q);
6421                 spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6422                 scsi_dma_unmap(scsi_cmd);
6423                 goto err_nodev;
6424         }
6425 
6426         ioarcb->res_handle = res->res_handle;
6427         if (res->needs_sync_complete) {
6428                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_SYNC_COMPLETE;
6429                 res->needs_sync_complete = 0;
6430         }
6431         list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_pending_q);
6432         ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_GET_RES_PHYS_LOC(res));
6433         ipr_send_command(ipr_cmd);
6434         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6435         return 0;
6436 
6437 err_nodev:
6438         spin_lock_irqsave(hrrq->lock, hrrq_flags);
6439         memset(scsi_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
6440         scsi_cmd->result = (DID_NO_CONNECT << 16);
6441         scsi_cmd->scsi_done(scsi_cmd);
6442         spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6443         return 0;
6444 }
6445 
6446 /**
6447  * ipr_ioctl - IOCTL handler
6448  * @sdev:       scsi device struct
6449  * @cmd:        IOCTL cmd
6450  * @arg:        IOCTL arg
6451  *
6452  * Return value:
6453  *      0 on success / other on failure
6454  **/
6455 static int ipr_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
6456 {
6457         struct ipr_resource_entry *res;
6458 
6459         res = (struct ipr_resource_entry *)sdev->hostdata;
6460         if (res && ipr_is_gata(res)) {
6461                 if (cmd == HDIO_GET_IDENTITY)
6462                         return -ENOTTY;
6463                 return ata_sas_scsi_ioctl(res->sata_port->ap, sdev, cmd, arg);
6464         }
6465 
6466         return -EINVAL;
6467 }
6468 
6469 /**
6470  * ipr_info - Get information about the card/driver
6471  * @scsi_host:  scsi host struct
6472  *
6473  * Return value:
6474  *      pointer to buffer with description string
6475  **/
6476 static const char *ipr_ioa_info(struct Scsi_Host *host)
6477 {
6478         static char buffer[512];
6479         struct ipr_ioa_cfg *ioa_cfg;
6480         unsigned long lock_flags = 0;
6481 
6482         ioa_cfg = (struct ipr_ioa_cfg *) host->hostdata;
6483 
6484         spin_lock_irqsave(host->host_lock, lock_flags);
6485         sprintf(buffer, "IBM %X Storage Adapter", ioa_cfg->type);
6486         spin_unlock_irqrestore(host->host_lock, lock_flags);
6487 
6488         return buffer;
6489 }
6490 
6491 static struct scsi_host_template driver_template = {
6492         .module = THIS_MODULE,
6493         .name = "IPR",
6494         .info = ipr_ioa_info,
6495         .ioctl = ipr_ioctl,
6496         .queuecommand = ipr_queuecommand,
6497         .eh_abort_handler = ipr_eh_abort,
6498         .eh_device_reset_handler = ipr_eh_dev_reset,
6499         .eh_host_reset_handler = ipr_eh_host_reset,
6500         .slave_alloc = ipr_slave_alloc,
6501         .slave_configure = ipr_slave_configure,
6502         .slave_destroy = ipr_slave_destroy,
6503         .scan_finished = ipr_scan_finished,
6504         .target_alloc = ipr_target_alloc,
6505         .target_destroy = ipr_target_destroy,
6506         .change_queue_depth = ipr_change_queue_depth,
6507         .bios_param = ipr_biosparam,
6508         .can_queue = IPR_MAX_COMMANDS,
6509         .this_id = -1,
6510         .sg_tablesize = IPR_MAX_SGLIST,
6511         .max_sectors = IPR_IOA_MAX_SECTORS,
6512         .cmd_per_lun = IPR_MAX_CMD_PER_LUN,
6513         .use_clustering = ENABLE_CLUSTERING,
6514         .shost_attrs = ipr_ioa_attrs,
6515         .sdev_attrs = ipr_dev_attrs,
6516         .proc_name = IPR_NAME,
6517 };
6518 
6519 /**
6520  * ipr_ata_phy_reset - libata phy_reset handler
6521  * @ap:         ata port to reset
6522  *
6523  **/
6524 static void ipr_ata_phy_reset(struct ata_port *ap)
6525 {
6526         unsigned long flags;
6527         struct ipr_sata_port *sata_port = ap->private_data;
6528         struct ipr_resource_entry *res = sata_port->res;
6529         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6530         int rc;
6531 
6532         ENTER;
6533         spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6534         while (ioa_cfg->in_reset_reload) {
6535                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6536                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
6537                 spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6538         }
6539 
6540         if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds)
6541                 goto out_unlock;
6542 
6543         rc = ipr_device_reset(ioa_cfg, res);
6544 
6545         if (rc) {
6546                 ap->link.device[0].class = ATA_DEV_NONE;
6547                 goto out_unlock;
6548         }
6549 
6550         ap->link.device[0].class = res->ata_class;
6551         if (ap->link.device[0].class == ATA_DEV_UNKNOWN)
6552                 ap->link.device[0].class = ATA_DEV_NONE;
6553 
6554 out_unlock:
6555         spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6556         LEAVE;
6557 }
6558 
6559 /**
6560  * ipr_ata_post_internal - Cleanup after an internal command
6561  * @qc: ATA queued command
6562  *
6563  * Return value:
6564  *      none
6565  **/
6566 static void ipr_ata_post_internal(struct ata_queued_cmd *qc)
6567 {
6568         struct ipr_sata_port *sata_port = qc->ap->private_data;
6569         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6570         struct ipr_cmnd *ipr_cmd;
6571         struct ipr_hrr_queue *hrrq;
6572         unsigned long flags;
6573 
6574         spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6575         while (ioa_cfg->in_reset_reload) {
6576                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6577                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
6578                 spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6579         }
6580 
6581         for_each_hrrq(hrrq, ioa_cfg) {
6582                 spin_lock(&hrrq->_lock);
6583                 list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
6584                         if (ipr_cmd->qc == qc) {
6585                                 ipr_device_reset(ioa_cfg, sata_port->res);
6586                                 break;
6587                         }
6588                 }
6589                 spin_unlock(&hrrq->_lock);
6590         }
6591         spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6592 }
6593 
6594 /**
6595  * ipr_copy_sata_tf - Copy a SATA taskfile to an IOA data structure
6596  * @regs:       destination
6597  * @tf: source ATA taskfile
6598  *
6599  * Return value:
6600  *      none
6601  **/
6602 static void ipr_copy_sata_tf(struct ipr_ioarcb_ata_regs *regs,
6603                              struct ata_taskfile *tf)
6604 {
6605         regs->feature = tf->feature;
6606         regs->nsect = tf->nsect;
6607         regs->lbal = tf->lbal;
6608         regs->lbam = tf->lbam;
6609         regs->lbah = tf->lbah;
6610         regs->device = tf->device;
6611         regs->command = tf->command;
6612         regs->hob_feature = tf->hob_feature;
6613         regs->hob_nsect = tf->hob_nsect;
6614         regs->hob_lbal = tf->hob_lbal;
6615         regs->hob_lbam = tf->hob_lbam;
6616         regs->hob_lbah = tf->hob_lbah;
6617         regs->ctl = tf->ctl;
6618 }
6619 
6620 /**
6621  * ipr_sata_done - done function for SATA commands
6622  * @ipr_cmd:    ipr command struct
6623  *
6624  * This function is invoked by the interrupt handler for
6625  * ops generated by the SCSI mid-layer to SATA devices
6626  *
6627  * Return value:
6628  *      none
6629  **/
6630 static void ipr_sata_done(struct ipr_cmnd *ipr_cmd)
6631 {
6632         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6633         struct ata_queued_cmd *qc = ipr_cmd->qc;
6634         struct ipr_sata_port *sata_port = qc->ap->private_data;
6635         struct ipr_resource_entry *res = sata_port->res;
6636         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
6637 
6638         spin_lock(&ipr_cmd->hrrq->_lock);
6639         if (ipr_cmd->ioa_cfg->sis64)
6640                 memcpy(&sata_port->ioasa, &ipr_cmd->s.ioasa64.u.gata,
6641                        sizeof(struct ipr_ioasa_gata));
6642         else
6643                 memcpy(&sata_port->ioasa, &ipr_cmd->s.ioasa.u.gata,
6644                        sizeof(struct ipr_ioasa_gata));
6645         ipr_dump_ioasa(ioa_cfg, ipr_cmd, res);
6646 
6647         if (be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc_specific) & IPR_ATA_DEVICE_WAS_RESET)
6648                 scsi_report_device_reset(ioa_cfg->host, res->bus, res->target);
6649 
6650         if (IPR_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
6651                 qc->err_mask |= __ac_err_mask(sata_port->ioasa.status);
6652         else
6653                 qc->err_mask |= ac_err_mask(sata_port->ioasa.status);
6654         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6655         spin_unlock(&ipr_cmd->hrrq->_lock);
6656         ata_qc_complete(qc);
6657 }
6658 
6659 /**
6660  * ipr_build_ata_ioadl64 - Build an ATA scatter/gather list
6661  * @ipr_cmd:    ipr command struct
6662  * @qc:         ATA queued command
6663  *
6664  **/
6665 static void ipr_build_ata_ioadl64(struct ipr_cmnd *ipr_cmd,
6666                                   struct ata_queued_cmd *qc)
6667 {
6668         u32 ioadl_flags = 0;
6669         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
6670         struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ata_ioadl.ioadl64;
6671         struct ipr_ioadl64_desc *last_ioadl64 = NULL;
6672         int len = qc->nbytes;
6673         struct scatterlist *sg;
6674         unsigned int si;
6675         dma_addr_t dma_addr = ipr_cmd->dma_addr;
6676 
6677         if (len == 0)
6678                 return;
6679 
6680         if (qc->dma_dir == DMA_TO_DEVICE) {
6681                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
6682                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
6683         } else if (qc->dma_dir == DMA_FROM_DEVICE)
6684                 ioadl_flags = IPR_IOADL_FLAGS_READ;
6685 
6686         ioarcb->data_transfer_length = cpu_to_be32(len);
6687         ioarcb->ioadl_len =
6688                 cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
6689         ioarcb->u.sis64_addr_data.data_ioadl_addr =
6690                 cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ata_ioadl.ioadl64));
6691 
6692         for_each_sg(qc->sg, sg, qc->n_elem, si) {
6693                 ioadl64->flags = cpu_to_be32(ioadl_flags);
6694                 ioadl64->data_len = cpu_to_be32(sg_dma_len(sg));
6695                 ioadl64->address = cpu_to_be64(sg_dma_address(sg));
6696 
6697                 last_ioadl64 = ioadl64;
6698                 ioadl64++;
6699         }
6700 
6701         if (likely(last_ioadl64))
6702                 last_ioadl64->flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
6703 }
6704 
6705 /**
6706  * ipr_build_ata_ioadl - Build an ATA scatter/gather list
6707  * @ipr_cmd:    ipr command struct
6708  * @qc:         ATA queued command
6709  *
6710  **/
6711 static void ipr_build_ata_ioadl(struct ipr_cmnd *ipr_cmd,
6712                                 struct ata_queued_cmd *qc)
6713 {
6714         u32 ioadl_flags = 0;
6715         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
6716         struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
6717         struct ipr_ioadl_desc *last_ioadl = NULL;
6718         int len = qc->nbytes;
6719         struct scatterlist *sg;
6720         unsigned int si;
6721 
6722         if (len == 0)
6723                 return;
6724 
6725         if (qc->dma_dir == DMA_TO_DEVICE) {
6726                 ioadl_flags = IPR_IOADL_FLAGS_WRITE;
6727                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
6728                 ioarcb->data_transfer_length = cpu_to_be32(len);
6729                 ioarcb->ioadl_len =
6730                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
6731         } else if (qc->dma_dir == DMA_FROM_DEVICE) {
6732                 ioadl_flags = IPR_IOADL_FLAGS_READ;
6733                 ioarcb->read_data_transfer_length = cpu_to_be32(len);
6734                 ioarcb->read_ioadl_len =
6735                         cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
6736         }
6737 
6738         for_each_sg(qc->sg, sg, qc->n_elem, si) {
6739                 ioadl->flags_and_data_len = cpu_to_be32(ioadl_flags | sg_dma_len(sg));
6740                 ioadl->address = cpu_to_be32(sg_dma_address(sg));
6741 
6742                 last_ioadl = ioadl;
6743                 ioadl++;
6744         }
6745 
6746         if (likely(last_ioadl))
6747                 last_ioadl->flags_and_data_len |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
6748 }
6749 
6750 /**
6751  * ipr_qc_defer - Get a free ipr_cmd
6752  * @qc: queued command
6753  *
6754  * Return value:
6755  *      0 if success
6756  **/
6757 static int ipr_qc_defer(struct ata_queued_cmd *qc)
6758 {
6759         struct ata_port *ap = qc->ap;
6760         struct ipr_sata_port *sata_port = ap->private_data;
6761         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6762         struct ipr_cmnd *ipr_cmd;
6763         struct ipr_hrr_queue *hrrq;
6764         int hrrq_id;
6765 
6766         hrrq_id = ipr_get_hrrq_index(ioa_cfg);
6767         hrrq = &ioa_cfg->hrrq[hrrq_id];
6768 
6769         qc->lldd_task = NULL;
6770         spin_lock(&hrrq->_lock);
6771         if (unlikely(hrrq->ioa_is_dead)) {
6772                 spin_unlock(&hrrq->_lock);
6773                 return 0;
6774         }
6775 
6776         if (unlikely(!hrrq->allow_cmds)) {
6777                 spin_unlock(&hrrq->_lock);
6778                 return ATA_DEFER_LINK;
6779         }
6780 
6781         ipr_cmd = __ipr_get_free_ipr_cmnd(hrrq);
6782         if (ipr_cmd == NULL) {
6783                 spin_unlock(&hrrq->_lock);
6784                 return ATA_DEFER_LINK;
6785         }
6786 
6787         qc->lldd_task = ipr_cmd;
6788         spin_unlock(&hrrq->_lock);
6789         return 0;
6790 }
6791 
6792 /**
6793  * ipr_qc_issue - Issue a SATA qc to a device
6794  * @qc: queued command
6795  *
6796  * Return value:
6797  *      0 if success
6798  **/
6799 static unsigned int ipr_qc_issue(struct ata_queued_cmd *qc)
6800 {
6801         struct ata_port *ap = qc->ap;
6802         struct ipr_sata_port *sata_port = ap->private_data;
6803         struct ipr_resource_entry *res = sata_port->res;
6804         struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6805         struct ipr_cmnd *ipr_cmd;
6806         struct ipr_ioarcb *ioarcb;
6807         struct ipr_ioarcb_ata_regs *regs;
6808 
6809         if (qc->lldd_task == NULL)
6810                 ipr_qc_defer(qc);
6811 
6812         ipr_cmd = qc->lldd_task;
6813         if (ipr_cmd == NULL)
6814                 return AC_ERR_SYSTEM;
6815 
6816         qc->lldd_task = NULL;
6817         spin_lock(&ipr_cmd->hrrq->_lock);
6818         if (unlikely(!ipr_cmd->hrrq->allow_cmds ||
6819                         ipr_cmd->hrrq->ioa_is_dead)) {
6820                 list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6821                 spin_unlock(&ipr_cmd->hrrq->_lock);
6822                 return AC_ERR_SYSTEM;
6823         }
6824 
6825         ipr_init_ipr_cmnd(ipr_cmd, ipr_lock_and_done);
6826         ioarcb = &ipr_cmd->ioarcb;
6827 
6828         if (ioa_cfg->sis64) {
6829                 regs = &ipr_cmd->i.ata_ioadl.regs;
6830                 ioarcb->add_cmd_parms_offset = cpu_to_be16(sizeof(*ioarcb));
6831         } else
6832                 regs = &ioarcb->u.add_data.u.regs;
6833 
6834         memset(regs, 0, sizeof(*regs));
6835         ioarcb->add_cmd_parms_len = cpu_to_be16(sizeof(*regs));
6836 
6837         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
6838         ipr_cmd->qc = qc;
6839         ipr_cmd->done = ipr_sata_done;
6840         ipr_cmd->ioarcb.res_handle = res->res_handle;
6841         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_ATA_PASSTHRU;
6842         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_LINK_DESC;
6843         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
6844         ipr_cmd->dma_use_sg = qc->n_elem;
6845 
6846         if (ioa_cfg->sis64)
6847                 ipr_build_ata_ioadl64(ipr_cmd, qc);
6848         else
6849                 ipr_build_ata_ioadl(ipr_cmd, qc);
6850 
6851         regs->flags |= IPR_ATA_FLAG_STATUS_ON_GOOD_COMPLETION;
6852         ipr_copy_sata_tf(regs, &qc->tf);
6853         memcpy(ioarcb->cmd_pkt.cdb, qc->cdb, IPR_MAX_CDB_LEN);
6854         ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_GET_RES_PHYS_LOC(res));
6855 
6856         switch (qc->tf.protocol) {
6857         case ATA_PROT_NODATA:
6858         case ATA_PROT_PIO:
6859                 break;
6860 
6861         case ATA_PROT_DMA:
6862                 regs->flags |= IPR_ATA_FLAG_XFER_TYPE_DMA;
6863                 break;
6864 
6865         case ATAPI_PROT_PIO:
6866         case ATAPI_PROT_NODATA:
6867                 regs->flags |= IPR_ATA_FLAG_PACKET_CMD;
6868                 break;
6869 
6870         case ATAPI_PROT_DMA:
6871                 regs->flags |= IPR_ATA_FLAG_PACKET_CMD;
6872                 regs->flags |= IPR_ATA_FLAG_XFER_TYPE_DMA;
6873                 break;
6874 
6875         default:
6876                 WARN_ON(1);
6877                 spin_unlock(&ipr_cmd->hrrq->_lock);
6878                 return AC_ERR_INVALID;
6879         }
6880 
6881         ipr_send_command(ipr_cmd);
6882         spin_unlock(&ipr_cmd->hrrq->_lock);
6883 
6884         return 0;
6885 }
6886 
6887 /**
6888  * ipr_qc_fill_rtf - Read result TF
6889  * @qc: ATA queued command
6890  *
6891  * Return value:
6892  *      true
6893  **/
6894 static bool ipr_qc_fill_rtf(struct ata_queued_cmd *qc)
6895 {
6896         struct ipr_sata_port *sata_port = qc->ap->private_data;
6897         struct ipr_ioasa_gata *g = &sata_port->ioasa;
6898         struct ata_taskfile *tf = &qc->result_tf;
6899 
6900         tf->feature = g->error;
6901         tf->nsect = g->nsect;
6902         tf->lbal = g->lbal;
6903         tf->lbam = g->lbam;
6904         tf->lbah = g->lbah;
6905         tf->device = g->device;
6906         tf->command = g->status;
6907         tf->hob_nsect = g->hob_nsect;
6908         tf->hob_lbal = g->hob_lbal;
6909         tf->hob_lbam = g->hob_lbam;
6910         tf->hob_lbah = g->hob_lbah;
6911 
6912         return true;
6913 }
6914 
6915 static struct ata_port_operations ipr_sata_ops = {
6916         .phy_reset = ipr_ata_phy_reset,
6917         .hardreset = ipr_sata_reset,
6918         .post_internal_cmd = ipr_ata_post_internal,
6919         .qc_prep = ata_noop_qc_prep,
6920         .qc_defer = ipr_qc_defer,
6921         .qc_issue = ipr_qc_issue,
6922         .qc_fill_rtf = ipr_qc_fill_rtf,
6923         .port_start = ata_sas_port_start,
6924         .port_stop = ata_sas_port_stop
6925 };
6926 
6927 static struct ata_port_info sata_port_info = {
6928         .flags          = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
6929                           ATA_FLAG_SAS_HOST,
6930         .pio_mask       = ATA_PIO4_ONLY,
6931         .mwdma_mask     = ATA_MWDMA2,
6932         .udma_mask      = ATA_UDMA6,
6933         .port_ops       = &ipr_sata_ops
6934 };
6935 
6936 #ifdef CONFIG_PPC_PSERIES
6937 static const u16 ipr_blocked_processors[] = {
6938         PVR_NORTHSTAR,
6939         PVR_PULSAR,
6940         PVR_POWER4,
6941         PVR_ICESTAR,
6942         PVR_SSTAR,
6943         PVR_POWER4p,
6944         PVR_630,
6945         PVR_630p
6946 };
6947 
6948 /**
6949  * ipr_invalid_adapter - Determine if this adapter is supported on this hardware
6950  * @ioa_cfg:    ioa cfg struct
6951  *
6952  * Adapters that use Gemstone revision < 3.1 do not work reliably on
6953  * certain pSeries hardware. This function determines if the given
6954  * adapter is in one of these confgurations or not.
6955  *
6956  * Return value:
6957  *      1 if adapter is not supported / 0 if adapter is supported
6958  **/
6959 static int ipr_invalid_adapter(struct ipr_ioa_cfg *ioa_cfg)
6960 {
6961         int i;
6962 
6963         if ((ioa_cfg->type == 0x5702) && (ioa_cfg->pdev->revision < 4)) {
6964                 for (i = 0; i < ARRAY_SIZE(ipr_blocked_processors); i++) {
6965                         if (pvr_version_is(ipr_blocked_processors[i]))
6966                                 return 1;
6967                 }
6968         }
6969         return 0;
6970 }
6971 #else
6972 #define ipr_invalid_adapter(ioa_cfg) 0
6973 #endif
6974 
6975 /**
6976  * ipr_ioa_bringdown_done - IOA bring down completion.
6977  * @ipr_cmd:    ipr command struct
6978  *
6979  * This function processes the completion of an adapter bring down.
6980  * It wakes any reset sleepers.
6981  *
6982  * Return value:
6983  *      IPR_RC_JOB_RETURN
6984  **/
6985 static int ipr_ioa_bringdown_done(struct ipr_cmnd *ipr_cmd)
6986 {
6987         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6988         int i;
6989 
6990         ENTER;
6991         if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].removing_ioa) {
6992                 ipr_trace;
6993                 spin_unlock_irq(ioa_cfg->host->host_lock);
6994                 scsi_unblock_requests(ioa_cfg->host);
6995                 spin_lock_irq(ioa_cfg->host->host_lock);
6996         }
6997 
6998         ioa_cfg->in_reset_reload = 0;
6999         ioa_cfg->reset_retries = 0;
7000         for (i = 0; i < ioa_cfg->hrrq_num; i++) {
7001                 spin_lock(&ioa_cfg->hrrq[i]._lock);
7002                 ioa_cfg->hrrq[i].ioa_is_dead = 1;
7003                 spin_unlock(&ioa_cfg->hrrq[i]._lock);
7004         }
7005         wmb();
7006 
7007         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
7008         wake_up_all(&ioa_cfg->reset_wait_q);
7009         LEAVE;
7010 
7011         return IPR_RC_JOB_RETURN;
7012 }
7013 
7014 /**
7015  * ipr_ioa_reset_done - IOA reset completion.
7016  * @ipr_cmd:    ipr command struct
7017  *
7018  * This function processes the completion of an adapter reset.
7019  * It schedules any necessary mid-layer add/removes and
7020  * wakes any reset sleepers.
7021  *
7022  * Return value:
7023  *      IPR_RC_JOB_RETURN
7024  **/
7025 static int ipr_ioa_reset_done(struct ipr_cmnd *ipr_cmd)
7026 {
7027         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7028         struct ipr_resource_entry *res;
7029         struct ipr_hostrcb *hostrcb, *temp;
7030         int i = 0, j;
7031 
7032         ENTER;
7033         ioa_cfg->in_reset_reload = 0;
7034         for (j = 0; j < ioa_cfg->hrrq_num; j++) {
7035                 spin_lock(&ioa_cfg->hrrq[j]._lock);
7036                 ioa_cfg->hrrq[j].allow_cmds = 1;
7037                 spin_unlock(&ioa_cfg->hrrq[j]._lock);
7038         }
7039         wmb();
7040         ioa_cfg->reset_cmd = NULL;
7041         ioa_cfg->doorbell |= IPR_RUNTIME_RESET;
7042 
7043         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
7044                 if (res->add_to_ml || res->del_from_ml) {
7045                         ipr_trace;
7046                         break;
7047                 }
7048         }
7049         schedule_work(&ioa_cfg->work_q);
7050 
7051         list_for_each_entry_safe(hostrcb, temp, &ioa_cfg->hostrcb_free_q, queue) {
7052                 list_del(&hostrcb->queue);
7053                 if (i++ < IPR_NUM_LOG_HCAMS)
7054                         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
7055                 else
7056                         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
7057         }
7058 
7059         scsi_report_bus_reset(ioa_cfg->host, IPR_VSET_BUS);
7060         dev_info(&ioa_cfg->pdev->dev, "IOA initialized.\n");
7061 
7062         ioa_cfg->reset_retries = 0;
7063         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
7064         wake_up_all(&ioa_cfg->reset_wait_q);
7065 
7066         spin_unlock(ioa_cfg->host->host_lock);
7067         scsi_unblock_requests(ioa_cfg->host);
7068         spin_lock(ioa_cfg->host->host_lock);
7069 
7070         if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds)
7071                 scsi_block_requests(ioa_cfg->host);
7072 
7073         schedule_work(&ioa_cfg->work_q);
7074         LEAVE;
7075         return IPR_RC_JOB_RETURN;
7076 }
7077 
7078 /**
7079  * ipr_set_sup_dev_dflt - Initialize a Set Supported Device buffer
7080  * @supported_dev:      supported device struct
7081  * @vpids:                      vendor product id struct
7082  *
7083  * Return value:
7084  *      none
7085  **/
7086 static void ipr_set_sup_dev_dflt(struct ipr_supported_device *supported_dev,
7087                                  struct ipr_std_inq_vpids *vpids)
7088 {
7089         memset(supported_dev, 0, sizeof(struct ipr_supported_device));
7090         memcpy(&supported_dev->vpids, vpids, sizeof(struct ipr_std_inq_vpids));
7091         supported_dev->num_records = 1;
7092         supported_dev->data_length =
7093                 cpu_to_be16(sizeof(struct ipr_supported_device));
7094         supported_dev->reserved = 0;
7095 }
7096 
7097 /**
7098  * ipr_set_supported_devs - Send Set Supported Devices for a device
7099  * @ipr_cmd:    ipr command struct
7100  *
7101  * This function sends a Set Supported Devices to the adapter
7102  *
7103  * Return value:
7104  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7105  **/
7106 static int ipr_set_supported_devs(struct ipr_cmnd *ipr_cmd)
7107 {
7108         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7109         struct ipr_supported_device *supp_dev = &ioa_cfg->vpd_cbs->supp_dev;
7110         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7111         struct ipr_resource_entry *res = ipr_cmd->u.res;
7112 
7113         ipr_cmd->job_step = ipr_ioa_reset_done;
7114 
7115         list_for_each_entry_continue(res, &ioa_cfg->used_res_q, queue) {
7116                 if (!ipr_is_scsi_disk(res))
7117                         continue;
7118 
7119                 ipr_cmd->u.res = res;
7120                 ipr_set_sup_dev_dflt(supp_dev, &res->std_inq_data.vpids);
7121 
7122                 ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7123                 ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
7124                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
7125 
7126                 ioarcb->cmd_pkt.cdb[0] = IPR_SET_SUPPORTED_DEVICES;
7127                 ioarcb->cmd_pkt.cdb[1] = IPR_SET_ALL_SUPPORTED_DEVICES;
7128                 ioarcb->cmd_pkt.cdb[7] = (sizeof(struct ipr_supported_device) >> 8) & 0xff;
7129                 ioarcb->cmd_pkt.cdb[8] = sizeof(struct ipr_supported_device) & 0xff;
7130 
7131                 ipr_init_ioadl(ipr_cmd,
7132                                ioa_cfg->vpd_cbs_dma +
7133                                  offsetof(struct ipr_misc_cbs, supp_dev),
7134                                sizeof(struct ipr_supported_device),
7135                                IPR_IOADL_FLAGS_WRITE_LAST);
7136 
7137                 ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout,
7138                            IPR_SET_SUP_DEVICE_TIMEOUT);
7139 
7140                 if (!ioa_cfg->sis64)
7141                         ipr_cmd->job_step = ipr_set_supported_devs;
7142                 LEAVE;
7143                 return IPR_RC_JOB_RETURN;
7144         }
7145 
7146         LEAVE;
7147         return IPR_RC_JOB_CONTINUE;
7148 }
7149 
7150 /**
7151  * ipr_get_mode_page - Locate specified mode page
7152  * @mode_pages: mode page buffer
7153  * @page_code:  page code to find
7154  * @len:                minimum required length for mode page
7155  *
7156  * Return value:
7157  *      pointer to mode page / NULL on failure
7158  **/
7159 static void *ipr_get_mode_page(struct ipr_mode_pages *mode_pages,
7160                                u32 page_code, u32 len)
7161 {
7162         struct ipr_mode_page_hdr *mode_hdr;
7163         u32 page_length;
7164         u32 length;
7165 
7166         if (!mode_pages || (mode_pages->hdr.length == 0))
7167                 return NULL;
7168 
7169         length = (mode_pages->hdr.length + 1) - 4 - mode_pages->hdr.block_desc_len;
7170         mode_hdr = (struct ipr_mode_page_hdr *)
7171                 (mode_pages->data + mode_pages->hdr.block_desc_len);
7172 
7173         while (length) {
7174                 if (IPR_GET_MODE_PAGE_CODE(mode_hdr) == page_code) {
7175                         if (mode_hdr->page_length >= (len - sizeof(struct ipr_mode_page_hdr)))
7176                                 return mode_hdr;
7177                         break;
7178                 } else {
7179                         page_length = (sizeof(struct ipr_mode_page_hdr) +
7180                                        mode_hdr->page_length);
7181                         length -= page_length;
7182                         mode_hdr = (struct ipr_mode_page_hdr *)
7183                                 ((unsigned long)mode_hdr + page_length);
7184                 }
7185         }
7186         return NULL;
7187 }
7188 
7189 /**
7190  * ipr_check_term_power - Check for term power errors
7191  * @ioa_cfg:    ioa config struct
7192  * @mode_pages: IOAFP mode pages buffer
7193  *
7194  * Check the IOAFP's mode page 28 for term power errors
7195  *
7196  * Return value:
7197  *      nothing
7198  **/
7199 static void ipr_check_term_power(struct ipr_ioa_cfg *ioa_cfg,
7200                                  struct ipr_mode_pages *mode_pages)
7201 {
7202         int i;
7203         int entry_length;
7204         struct ipr_dev_bus_entry *bus;
7205         struct ipr_mode_page28 *mode_page;
7206 
7207         mode_page = ipr_get_mode_page(mode_pages, 0x28,
7208                                       sizeof(struct ipr_mode_page28));
7209 
7210         entry_length = mode_page->entry_length;
7211 
7212         bus = mode_page->bus;
7213 
7214         for (i = 0; i < mode_page->num_entries; i++) {
7215                 if (bus->flags & IPR_SCSI_ATTR_NO_TERM_PWR) {
7216                         dev_err(&ioa_cfg->pdev->dev,
7217                                 "Term power is absent on scsi bus %d\n",
7218                                 bus->res_addr.bus);
7219                 }
7220 
7221                 bus = (struct ipr_dev_bus_entry *)((char *)bus + entry_length);
7222         }
7223 }
7224 
7225 /**
7226  * ipr_scsi_bus_speed_limit - Limit the SCSI speed based on SES table
7227  * @ioa_cfg:    ioa config struct
7228  *
7229  * Looks through the config table checking for SES devices. If
7230  * the SES device is in the SES table indicating a maximum SCSI
7231  * bus speed, the speed is limited for the bus.
7232  *
7233  * Return value:
7234  *      none
7235  **/
7236 static void ipr_scsi_bus_speed_limit(struct ipr_ioa_cfg *ioa_cfg)
7237 {
7238         u32 max_xfer_rate;
7239         int i;
7240 
7241         for (i = 0; i < IPR_MAX_NUM_BUSES; i++) {
7242                 max_xfer_rate = ipr_get_max_scsi_speed(ioa_cfg, i,
7243                                                        ioa_cfg->bus_attr[i].bus_width);
7244 
7245                 if (max_xfer_rate < ioa_cfg->bus_attr[i].max_xfer_rate)
7246                         ioa_cfg->bus_attr[i].max_xfer_rate = max_xfer_rate;
7247         }
7248 }
7249 
7250 /**
7251  * ipr_modify_ioafp_mode_page_28 - Modify IOAFP Mode Page 28
7252  * @ioa_cfg:    ioa config struct
7253  * @mode_pages: mode page 28 buffer
7254  *
7255  * Updates mode page 28 based on driver configuration
7256  *
7257  * Return value:
7258  *      none
7259  **/
7260 static void ipr_modify_ioafp_mode_page_28(struct ipr_ioa_cfg *ioa_cfg,
7261                                           struct ipr_mode_pages *mode_pages)
7262 {
7263         int i, entry_length;
7264         struct ipr_dev_bus_entry *bus;
7265         struct ipr_bus_attributes *bus_attr;
7266         struct ipr_mode_page28 *mode_page;
7267 
7268         mode_page = ipr_get_mode_page(mode_pages, 0x28,
7269                                       sizeof(struct ipr_mode_page28));
7270 
7271         entry_length = mode_page->entry_length;
7272 
7273         /* Loop for each device bus entry */
7274         for (i = 0, bus = mode_page->bus;
7275              i < mode_page->num_entries;
7276              i++, bus = (struct ipr_dev_bus_entry *)((u8 *)bus + entry_length)) {
7277                 if (bus->res_addr.bus > IPR_MAX_NUM_BUSES) {
7278                         dev_err(&ioa_cfg->pdev->dev,
7279                                 "Invalid resource address reported: 0x%08X\n",
7280                                 IPR_GET_PHYS_LOC(bus->res_addr));
7281                         continue;
7282                 }
7283 
7284                 bus_attr = &ioa_cfg->bus_attr[i];
7285                 bus->extended_reset_delay = IPR_EXTENDED_RESET_DELAY;
7286                 bus->bus_width = bus_attr->bus_width;
7287                 bus->max_xfer_rate = cpu_to_be32(bus_attr->max_xfer_rate);
7288                 bus->flags &= ~IPR_SCSI_ATTR_QAS_MASK;
7289                 if (bus_attr->qas_enabled)
7290                         bus->flags |= IPR_SCSI_ATTR_ENABLE_QAS;
7291                 else
7292                         bus->flags |= IPR_SCSI_ATTR_DISABLE_QAS;
7293         }
7294 }
7295 
7296 /**
7297  * ipr_build_mode_select - Build a mode select command
7298  * @ipr_cmd:    ipr command struct
7299  * @res_handle: resource handle to send command to
7300  * @parm:               Byte 2 of Mode Sense command
7301  * @dma_addr:   DMA buffer address
7302  * @xfer_len:   data transfer length
7303  *
7304  * Return value:
7305  *      none
7306  **/
7307 static void ipr_build_mode_select(struct ipr_cmnd *ipr_cmd,
7308                                   __be32 res_handle, u8 parm,
7309                                   dma_addr_t dma_addr, u8 xfer_len)
7310 {
7311         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7312 
7313         ioarcb->res_handle = res_handle;
7314         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7315         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
7316         ioarcb->cmd_pkt.cdb[0] = MODE_SELECT;
7317         ioarcb->cmd_pkt.cdb[1] = parm;
7318         ioarcb->cmd_pkt.cdb[4] = xfer_len;
7319 
7320         ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_WRITE_LAST);
7321 }
7322 
7323 /**
7324  * ipr_ioafp_mode_select_page28 - Issue Mode Select Page 28 to IOA
7325  * @ipr_cmd:    ipr command struct
7326  *
7327  * This function sets up the SCSI bus attributes and sends
7328  * a Mode Select for Page 28 to activate them.
7329  *
7330  * Return value:
7331  *      IPR_RC_JOB_RETURN
7332  **/
7333 static int ipr_ioafp_mode_select_page28(struct ipr_cmnd *ipr_cmd)
7334 {
7335         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7336         struct ipr_mode_pages *mode_pages = &ioa_cfg->vpd_cbs->mode_pages;
7337         int length;
7338 
7339         ENTER;
7340         ipr_scsi_bus_speed_limit(ioa_cfg);
7341         ipr_check_term_power(ioa_cfg, mode_pages);
7342         ipr_modify_ioafp_mode_page_28(ioa_cfg, mode_pages);
7343         length = mode_pages->hdr.length + 1;
7344         mode_pages->hdr.length = 0;
7345 
7346         ipr_build_mode_select(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE), 0x11,
7347                               ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, mode_pages),
7348                               length);
7349 
7350         ipr_cmd->job_step = ipr_set_supported_devs;
7351         ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next,
7352                                     struct ipr_resource_entry, queue);
7353         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7354 
7355         LEAVE;
7356         return IPR_RC_JOB_RETURN;
7357 }
7358 
7359 /**
7360  * ipr_build_mode_sense - Builds a mode sense command
7361  * @ipr_cmd:    ipr command struct
7362  * @res:                resource entry struct
7363  * @parm:               Byte 2 of mode sense command
7364  * @dma_addr:   DMA address of mode sense buffer
7365  * @xfer_len:   Size of DMA buffer
7366  *
7367  * Return value:
7368  *      none
7369  **/
7370 static void ipr_build_mode_sense(struct ipr_cmnd *ipr_cmd,
7371                                  __be32 res_handle,
7372                                  u8 parm, dma_addr_t dma_addr, u8 xfer_len)
7373 {
7374         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7375 
7376         ioarcb->res_handle = res_handle;
7377         ioarcb->cmd_pkt.cdb[0] = MODE_SENSE;
7378         ioarcb->cmd_pkt.cdb[2] = parm;
7379         ioarcb->cmd_pkt.cdb[4] = xfer_len;
7380         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7381 
7382         ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_READ_LAST);
7383 }
7384 
7385 /**
7386  * ipr_reset_cmd_failed - Handle failure of IOA reset command
7387  * @ipr_cmd:    ipr command struct
7388  *
7389  * This function handles the failure of an IOA bringup command.
7390  *
7391  * Return value:
7392  *      IPR_RC_JOB_RETURN
7393  **/
7394 static int ipr_reset_cmd_failed(struct ipr_cmnd *ipr_cmd)
7395 {
7396         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7397         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7398 
7399         dev_err(&ioa_cfg->pdev->dev,
7400                 "0x%02X failed with IOASC: 0x%08X\n",
7401                 ipr_cmd->ioarcb.cmd_pkt.cdb[0], ioasc);
7402 
7403         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
7404         list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
7405         return IPR_RC_JOB_RETURN;
7406 }
7407 
7408 /**
7409  * ipr_reset_mode_sense_failed - Handle failure of IOAFP mode sense
7410  * @ipr_cmd:    ipr command struct
7411  *
7412  * This function handles the failure of a Mode Sense to the IOAFP.
7413  * Some adapters do not handle all mode pages.
7414  *
7415  * Return value:
7416  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7417  **/
7418 static int ipr_reset_mode_sense_failed(struct ipr_cmnd *ipr_cmd)
7419 {
7420         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7421         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7422 
7423         if (ioasc == IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT) {
7424                 ipr_cmd->job_step = ipr_set_supported_devs;
7425                 ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next,
7426                                             struct ipr_resource_entry, queue);
7427                 return IPR_RC_JOB_CONTINUE;
7428         }
7429 
7430         return ipr_reset_cmd_failed(ipr_cmd);
7431 }
7432 
7433 /**
7434  * ipr_ioafp_mode_sense_page28 - Issue Mode Sense Page 28 to IOA
7435  * @ipr_cmd:    ipr command struct
7436  *
7437  * This function send a Page 28 mode sense to the IOA to
7438  * retrieve SCSI bus attributes.
7439  *
7440  * Return value:
7441  *      IPR_RC_JOB_RETURN
7442  **/
7443 static int ipr_ioafp_mode_sense_page28(struct ipr_cmnd *ipr_cmd)
7444 {
7445         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7446 
7447         ENTER;
7448         ipr_build_mode_sense(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE),
7449                              0x28, ioa_cfg->vpd_cbs_dma +
7450                              offsetof(struct ipr_misc_cbs, mode_pages),
7451                              sizeof(struct ipr_mode_pages));
7452 
7453         ipr_cmd->job_step = ipr_ioafp_mode_select_page28;
7454         ipr_cmd->job_step_failed = ipr_reset_mode_sense_failed;
7455 
7456         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7457 
7458         LEAVE;
7459         return IPR_RC_JOB_RETURN;
7460 }
7461 
7462 /**
7463  * ipr_ioafp_mode_select_page24 - Issue Mode Select to IOA
7464  * @ipr_cmd:    ipr command struct
7465  *
7466  * This function enables dual IOA RAID support if possible.
7467  *
7468  * Return value:
7469  *      IPR_RC_JOB_RETURN
7470  **/
7471 static int ipr_ioafp_mode_select_page24(struct ipr_cmnd *ipr_cmd)
7472 {
7473         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7474         struct ipr_mode_pages *mode_pages = &ioa_cfg->vpd_cbs->mode_pages;
7475         struct ipr_mode_page24 *mode_page;
7476         int length;
7477 
7478         ENTER;
7479         mode_page = ipr_get_mode_page(mode_pages, 0x24,
7480                                       sizeof(struct ipr_mode_page24));
7481 
7482         if (mode_page)
7483                 mode_page->flags |= IPR_ENABLE_DUAL_IOA_AF;
7484 
7485         length = mode_pages->hdr.length + 1;
7486         mode_pages->hdr.length = 0;
7487 
7488         ipr_build_mode_select(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE), 0x11,
7489                               ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, mode_pages),
7490                               length);
7491 
7492         ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7493         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7494 
7495         LEAVE;
7496         return IPR_RC_JOB_RETURN;
7497 }
7498 
7499 /**
7500  * ipr_reset_mode_sense_page24_failed - Handle failure of IOAFP mode sense
7501  * @ipr_cmd:    ipr command struct
7502  *
7503  * This function handles the failure of a Mode Sense to the IOAFP.
7504  * Some adapters do not handle all mode pages.
7505  *
7506  * Return value:
7507  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7508  **/
7509 static int ipr_reset_mode_sense_page24_failed(struct ipr_cmnd *ipr_cmd)
7510 {
7511         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7512 
7513         if (ioasc == IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT) {
7514                 ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7515                 return IPR_RC_JOB_CONTINUE;
7516         }
7517 
7518         return ipr_reset_cmd_failed(ipr_cmd);
7519 }
7520 
7521 /**
7522  * ipr_ioafp_mode_sense_page24 - Issue Page 24 Mode Sense to IOA
7523  * @ipr_cmd:    ipr command struct
7524  *
7525  * This function send a mode sense to the IOA to retrieve
7526  * the IOA Advanced Function Control mode page.
7527  *
7528  * Return value:
7529  *      IPR_RC_JOB_RETURN
7530  **/
7531 static int ipr_ioafp_mode_sense_page24(struct ipr_cmnd *ipr_cmd)
7532 {
7533         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7534 
7535         ENTER;
7536         ipr_build_mode_sense(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE),
7537                              0x24, ioa_cfg->vpd_cbs_dma +
7538                              offsetof(struct ipr_misc_cbs, mode_pages),
7539                              sizeof(struct ipr_mode_pages));
7540 
7541         ipr_cmd->job_step = ipr_ioafp_mode_select_page24;
7542         ipr_cmd->job_step_failed = ipr_reset_mode_sense_page24_failed;
7543 
7544         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7545 
7546         LEAVE;
7547         return IPR_RC_JOB_RETURN;
7548 }
7549 
7550 /**
7551  * ipr_init_res_table - Initialize the resource table
7552  * @ipr_cmd:    ipr command struct
7553  *
7554  * This function looks through the existing resource table, comparing
7555  * it with the config table. This function will take care of old/new
7556  * devices and schedule adding/removing them from the mid-layer
7557  * as appropriate.
7558  *
7559  * Return value:
7560  *      IPR_RC_JOB_CONTINUE
7561  **/
7562 static int ipr_init_res_table(struct ipr_cmnd *ipr_cmd)
7563 {
7564         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7565         struct ipr_resource_entry *res, *temp;
7566         struct ipr_config_table_entry_wrapper cfgtew;
7567         int entries, found, flag, i;
7568         LIST_HEAD(old_res);
7569 
7570         ENTER;
7571         if (ioa_cfg->sis64)
7572                 flag = ioa_cfg->u.cfg_table64->hdr64.flags;
7573         else
7574                 flag = ioa_cfg->u.cfg_table->hdr.flags;
7575 
7576         if (flag & IPR_UCODE_DOWNLOAD_REQ)
7577                 dev_err(&ioa_cfg->pdev->dev, "Microcode download required\n");
7578 
7579         list_for_each_entry_safe(res, temp, &ioa_cfg->used_res_q, queue)
7580                 list_move_tail(&res->queue, &old_res);
7581 
7582         if (ioa_cfg->sis64)
7583                 entries = be16_to_cpu(ioa_cfg->u.cfg_table64->hdr64.num_entries);
7584         else
7585                 entries = ioa_cfg->u.cfg_table->hdr.num_entries;
7586 
7587         for (i = 0; i < entries; i++) {
7588                 if (ioa_cfg->sis64)
7589                         cfgtew.u.cfgte64 = &ioa_cfg->u.cfg_table64->dev[i];
7590                 else
7591                         cfgtew.u.cfgte = &ioa_cfg->u.cfg_table->dev[i];
7592                 found = 0;
7593 
7594                 list_for_each_entry_safe(res, temp, &old_res, queue) {
7595                         if (ipr_is_same_device(res, &cfgtew)) {
7596                                 list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7597                                 found = 1;
7598                                 break;
7599                         }
7600                 }
7601 
7602                 if (!found) {
7603                         if (list_empty(&ioa_cfg->free_res_q)) {
7604                                 dev_err(&ioa_cfg->pdev->dev, "Too many devices attached\n");
7605                                 break;
7606                         }
7607 
7608                         found = 1;
7609                         res = list_entry(ioa_cfg->free_res_q.next,
7610                                          struct ipr_resource_entry, queue);
7611                         list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7612                         ipr_init_res_entry(res, &cfgtew);
7613                         res->add_to_ml = 1;
7614                 } else if (res->sdev && (ipr_is_vset_device(res) || ipr_is_scsi_disk(res)))
7615                         res->sdev->allow_restart = 1;
7616 
7617                 if (found)
7618                         ipr_update_res_entry(res, &cfgtew);
7619         }
7620 
7621         list_for_each_entry_safe(res, temp, &old_res, queue) {
7622                 if (res->sdev) {
7623                         res->del_from_ml = 1;
7624                         res->res_handle = IPR_INVALID_RES_HANDLE;
7625                         list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7626                 }
7627         }
7628 
7629         list_for_each_entry_safe(res, temp, &old_res, queue) {
7630                 ipr_clear_res_target(res);
7631                 list_move_tail(&res->queue, &ioa_cfg->free_res_q);
7632         }
7633 
7634         if (ioa_cfg->dual_raid && ipr_dual_ioa_raid)
7635                 ipr_cmd->job_step = ipr_ioafp_mode_sense_page24;
7636         else
7637                 ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7638 
7639         LEAVE;
7640         return IPR_RC_JOB_CONTINUE;
7641 }
7642 
7643 /**
7644  * ipr_ioafp_query_ioa_cfg - Send a Query IOA Config to the adapter.
7645  * @ipr_cmd:    ipr command struct
7646  *
7647  * This function sends a Query IOA Configuration command
7648  * to the adapter to retrieve the IOA configuration table.
7649  *
7650  * Return value:
7651  *      IPR_RC_JOB_RETURN
7652  **/
7653 static int ipr_ioafp_query_ioa_cfg(struct ipr_cmnd *ipr_cmd)
7654 {
7655         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7656         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7657         struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
7658         struct ipr_inquiry_cap *cap = &ioa_cfg->vpd_cbs->cap;
7659 
7660         ENTER;
7661         if (cap->cap & IPR_CAP_DUAL_IOA_RAID)
7662                 ioa_cfg->dual_raid = 1;
7663         dev_info(&ioa_cfg->pdev->dev, "Adapter firmware version: %02X%02X%02X%02X\n",
7664                  ucode_vpd->major_release, ucode_vpd->card_type,
7665                  ucode_vpd->minor_release[0], ucode_vpd->minor_release[1]);
7666         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
7667         ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7668 
7669         ioarcb->cmd_pkt.cdb[0] = IPR_QUERY_IOA_CONFIG;
7670         ioarcb->cmd_pkt.cdb[6] = (ioa_cfg->cfg_table_size >> 16) & 0xff;
7671         ioarcb->cmd_pkt.cdb[7] = (ioa_cfg->cfg_table_size >> 8) & 0xff;
7672         ioarcb->cmd_pkt.cdb[8] = ioa_cfg->cfg_table_size & 0xff;
7673 
7674         ipr_init_ioadl(ipr_cmd, ioa_cfg->cfg_table_dma, ioa_cfg->cfg_table_size,
7675                        IPR_IOADL_FLAGS_READ_LAST);
7676 
7677         ipr_cmd->job_step = ipr_init_res_table;
7678 
7679         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7680 
7681         LEAVE;
7682         return IPR_RC_JOB_RETURN;
7683 }
7684 
7685 static int ipr_ioa_service_action_failed(struct ipr_cmnd *ipr_cmd)
7686 {
7687         u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7688 
7689         if (ioasc == IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT)
7690                 return IPR_RC_JOB_CONTINUE;
7691 
7692         return ipr_reset_cmd_failed(ipr_cmd);
7693 }
7694 
7695 static void ipr_build_ioa_service_action(struct ipr_cmnd *ipr_cmd,
7696                                          __be32 res_handle, u8 sa_code)
7697 {
7698         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7699 
7700         ioarcb->res_handle = res_handle;
7701         ioarcb->cmd_pkt.cdb[0] = IPR_IOA_SERVICE_ACTION;
7702         ioarcb->cmd_pkt.cdb[1] = sa_code;
7703         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
7704 }
7705 
7706 /**
7707  * ipr_ioafp_set_caching_parameters - Issue Set Cache parameters service
7708  * action
7709  *
7710  * Return value:
7711  *      none
7712  **/
7713 static int ipr_ioafp_set_caching_parameters(struct ipr_cmnd *ipr_cmd)
7714 {
7715         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7716         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7717         struct ipr_inquiry_pageC4 *pageC4 = &ioa_cfg->vpd_cbs->pageC4_data;
7718 
7719         ENTER;
7720 
7721         ipr_cmd->job_step = ipr_ioafp_query_ioa_cfg;
7722 
7723         if (pageC4->cache_cap[0] & IPR_CAP_SYNC_CACHE) {
7724                 ipr_build_ioa_service_action(ipr_cmd,
7725                                              cpu_to_be32(IPR_IOA_RES_HANDLE),
7726                                              IPR_IOA_SA_CHANGE_CACHE_PARAMS);
7727 
7728                 ioarcb->cmd_pkt.cdb[2] = 0x40;
7729 
7730                 ipr_cmd->job_step_failed = ipr_ioa_service_action_failed;
7731                 ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout,
7732                            IPR_SET_SUP_DEVICE_TIMEOUT);
7733 
7734                 LEAVE;
7735                 return IPR_RC_JOB_RETURN;
7736         }
7737 
7738         LEAVE;
7739         return IPR_RC_JOB_CONTINUE;
7740 }
7741 
7742 /**
7743  * ipr_ioafp_inquiry - Send an Inquiry to the adapter.
7744  * @ipr_cmd:    ipr command struct
7745  *
7746  * This utility function sends an inquiry to the adapter.
7747  *
7748  * Return value:
7749  *      none
7750  **/
7751 static void ipr_ioafp_inquiry(struct ipr_cmnd *ipr_cmd, u8 flags, u8 page,
7752                               dma_addr_t dma_addr, u8 xfer_len)
7753 {
7754         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7755 
7756         ENTER;
7757         ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7758         ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7759 
7760         ioarcb->cmd_pkt.cdb[0] = INQUIRY;
7761         ioarcb->cmd_pkt.cdb[1] = flags;
7762         ioarcb->cmd_pkt.cdb[2] = page;
7763         ioarcb->cmd_pkt.cdb[4] = xfer_len;
7764 
7765         ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_READ_LAST);
7766 
7767         ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7768         LEAVE;
7769 }
7770 
7771 /**
7772  * ipr_inquiry_page_supported - Is the given inquiry page supported
7773  * @page0:              inquiry page 0 buffer
7774  * @page:               page code.
7775  *
7776  * This function determines if the specified inquiry page is supported.
7777  *
7778  * Return value:
7779  *      1 if page is supported / 0 if not
7780  **/
7781 static int ipr_inquiry_page_supported(struct ipr_inquiry_page0 *page0, u8 page)
7782 {
7783         int i;
7784 
7785         for (i = 0; i < min_t(u8, page0->len, IPR_INQUIRY_PAGE0_ENTRIES); i++)
7786                 if (page0->page[i] == page)
7787                         return 1;
7788 
7789         return 0;
7790 }
7791 
7792 /**
7793  * ipr_ioafp_pageC4_inquiry - Send a Page 0xC4 Inquiry to the adapter.
7794  * @ipr_cmd:    ipr command struct
7795  *
7796  * This function sends a Page 0xC4 inquiry to the adapter
7797  * to retrieve software VPD information.
7798  *
7799  * Return value:
7800  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7801  **/
7802 static int ipr_ioafp_pageC4_inquiry(struct ipr_cmnd *ipr_cmd)
7803 {
7804         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7805         struct ipr_inquiry_page0 *page0 = &ioa_cfg->vpd_cbs->page0_data;
7806         struct ipr_inquiry_pageC4 *pageC4 = &ioa_cfg->vpd_cbs->pageC4_data;
7807 
7808         ENTER;
7809         ipr_cmd->job_step = ipr_ioafp_set_caching_parameters;
7810         memset(pageC4, 0, sizeof(*pageC4));
7811 
7812         if (ipr_inquiry_page_supported(page0, 0xC4)) {
7813                 ipr_ioafp_inquiry(ipr_cmd, 1, 0xC4,
7814                                   (ioa_cfg->vpd_cbs_dma
7815                                    + offsetof(struct ipr_misc_cbs,
7816                                               pageC4_data)),
7817                                   sizeof(struct ipr_inquiry_pageC4));
7818                 return IPR_RC_JOB_RETURN;
7819         }
7820 
7821         LEAVE;
7822         return IPR_RC_JOB_CONTINUE;
7823 }
7824 
7825 /**
7826  * ipr_ioafp_cap_inquiry - Send a Page 0xD0 Inquiry to the adapter.
7827  * @ipr_cmd:    ipr command struct
7828  *
7829  * This function sends a Page 0xD0 inquiry to the adapter
7830  * to retrieve adapter capabilities.
7831  *
7832  * Return value:
7833  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7834  **/
7835 static int ipr_ioafp_cap_inquiry(struct ipr_cmnd *ipr_cmd)
7836 {
7837         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7838         struct ipr_inquiry_page0 *page0 = &ioa_cfg->vpd_cbs->page0_data;
7839         struct ipr_inquiry_cap *cap = &ioa_cfg->vpd_cbs->cap;
7840 
7841         ENTER;
7842         ipr_cmd->job_step = ipr_ioafp_pageC4_inquiry;
7843         memset(cap, 0, sizeof(*cap));
7844 
7845         if (ipr_inquiry_page_supported(page0, 0xD0)) {
7846                 ipr_ioafp_inquiry(ipr_cmd, 1, 0xD0,
7847                                   ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, cap),
7848                                   sizeof(struct ipr_inquiry_cap));
7849                 return IPR_RC_JOB_RETURN;
7850         }
7851 
7852         LEAVE;
7853         return IPR_RC_JOB_CONTINUE;
7854 }
7855 
7856 /**
7857  * ipr_ioafp_page3_inquiry - Send a Page 3 Inquiry to the adapter.
7858  * @ipr_cmd:    ipr command struct
7859  *
7860  * This function sends a Page 3 inquiry to the adapter
7861  * to retrieve software VPD information.
7862  *
7863  * Return value:
7864  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7865  **/
7866 static int ipr_ioafp_page3_inquiry(struct ipr_cmnd *ipr_cmd)
7867 {
7868         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7869 
7870         ENTER;
7871 
7872         ipr_cmd->job_step = ipr_ioafp_cap_inquiry;
7873 
7874         ipr_ioafp_inquiry(ipr_cmd, 1, 3,
7875                           ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page3_data),
7876                           sizeof(struct ipr_inquiry_page3));
7877 
7878         LEAVE;
7879         return IPR_RC_JOB_RETURN;
7880 }
7881 
7882 /**
7883  * ipr_ioafp_page0_inquiry - Send a Page 0 Inquiry to the adapter.
7884  * @ipr_cmd:    ipr command struct
7885  *
7886  * This function sends a Page 0 inquiry to the adapter
7887  * to retrieve supported inquiry pages.
7888  *
7889  * Return value:
7890  *      IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7891  **/
7892 static int ipr_ioafp_page0_inquiry(struct ipr_cmnd *ipr_cmd)
7893 {
7894         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7895         char type[5];
7896 
7897         ENTER;
7898 
7899         /* Grab the type out of the VPD and store it away */
7900         memcpy(type, ioa_cfg->vpd_cbs->ioa_vpd.std_inq_data.vpids.product_id, 4);
7901         type[4] = '\0';
7902         ioa_cfg->type = simple_strtoul((char *)type, NULL, 16);
7903 
7904         if (ipr_invalid_adapter(ioa_cfg)) {
7905                 dev_err(&ioa_cfg->pdev->dev,
7906                         "Adapter not supported in this hardware configuration.\n");
7907 
7908                 if (!ipr_testmode) {
7909                         ioa_cfg->reset_retries += IPR_NUM_RESET_RELOAD_RETRIES;
7910                         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
7911                         list_add_tail(&ipr_cmd->queue,
7912                                         &ioa_cfg->hrrq->hrrq_free_q);
7913                         return IPR_RC_JOB_RETURN;
7914                 }
7915         }
7916 
7917         ipr_cmd->job_step = ipr_ioafp_page3_inquiry;
7918 
7919         ipr_ioafp_inquiry(ipr_cmd, 1, 0,
7920