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/ioport.h>
  63 #include <linux/delay.h>
  64 #include <linux/pci.h>
  65 #include <linux/wait.h>
  66 #include <linux/spinlock.h>
  67 #include <linux/sched.h>
  68 #include <linux/interrupt.h>
  69 #include <linux/blkdev.h>
  70 #include <linux/firmware.h>
  71 #include <linux/module.h>
  72 #include <linux/moduleparam.h>
  73 #include <linux/libata.h>
  74 #include <asm/io.h>
  75 #include <asm/irq.h>
  76 #include <asm/processor.h>
  77 #include <scsi/scsi.h>
  78 #include <scsi/scsi_host.h>
  79 #include <scsi/scsi_tcq.h>
  80 #include <scsi/scsi_eh.h>
  81 #include <scsi/scsi_cmnd.h>
  82 #include "ipr.h"
  83
  84 /*
  85  *   Global Data
  86  */
  87 static struct list_head ipr_ioa_head = LIST_HEAD_INIT(ipr_ioa_head);
  88 static unsigned int ipr_log_level = IPR_DEFAULT_LOG_LEVEL;
  89 static unsigned int ipr_max_speed = 1;
  90 static int ipr_testmode = 0;
  91 static unsigned int ipr_fastfail = 0;
  92 static unsigned int ipr_transop_timeout = 0;
  93 static unsigned int ipr_enable_cache = 1;
  94 static unsigned int ipr_debug = 0;
  95 static unsigned int ipr_dual_ioa_raid = 1;
  96 static DEFINE_SPINLOCK(ipr_driver_lock);
  97
  98 /* This table describes the differences between DMA controller chips */
  99 static const struct ipr_chip_cfg_t ipr_chip_cfg[] = {
 100         { /* Gemstone, Citrine, Obsidian, and Obsidian-E */
 101                 .mailbox = 0x0042C,
 102                 .cache_line_size = 0x20,
 103                 {
 104                         .set_interrupt_mask_reg = 0x0022C,
 105                         .clr_interrupt_mask_reg = 0x00230,
 106                         .sense_interrupt_mask_reg = 0x0022C,
 107                         .clr_interrupt_reg = 0x00228,
 108                         .sense_interrupt_reg = 0x00224,
 109                         .ioarrin_reg = 0x00404,
 110                         .sense_uproc_interrupt_reg = 0x00214,
 111                         .set_uproc_interrupt_reg = 0x00214,
 112                         .clr_uproc_interrupt_reg = 0x00218
 113                 }
 114         },
 115         { /* Snipe and Scamp */
 116                 .mailbox = 0x0052C,
 117                 .cache_line_size = 0x20,
 118                 {
 119                         .set_interrupt_mask_reg = 0x00288,
 120                         .clr_interrupt_mask_reg = 0x0028C,
 121                         .sense_interrupt_mask_reg = 0x00288,
 122                         .clr_interrupt_reg = 0x00284,
 123                         .sense_interrupt_reg = 0x00280,
 124                         .ioarrin_reg = 0x00504,
 125                         .sense_uproc_interrupt_reg = 0x00290,
 126                         .set_uproc_interrupt_reg = 0x00290,
 127                         .clr_uproc_interrupt_reg = 0x00294
 128                 }
 129         },
 130 };
 131
 132 static const struct ipr_chip_t ipr_chip[] = {
 133         { PCI_VENDOR_ID_MYLEX, PCI_DEVICE_ID_IBM_GEMSTONE, &ipr_chip_cfg[0] },
 134         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE, &ipr_chip_cfg[0] },
 135         { PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_OBSIDIAN, &ipr_chip_cfg[0] },
 136         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN, &ipr_chip_cfg[0] },
 137         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E, &ipr_chip_cfg[0] },
 138         { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_SNIPE, &ipr_chip_cfg[1] },
 139         { PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_SCAMP, &ipr_chip_cfg[1] }
 140 };
 141
 142 static int ipr_max_bus_speeds [] = {
 143         IPR_80MBs_SCSI_RATE, IPR_U160_SCSI_RATE, IPR_U320_SCSI_RATE
 144 };
 145
 146 MODULE_AUTHOR("Brian King <brking@us.ibm.com>");
 147 MODULE_DESCRIPTION("IBM Power RAID SCSI Adapter Driver");
 148 module_param_named(max_speed, ipr_max_speed, uint, 0);
 149 MODULE_PARM_DESC(max_speed, "Maximum bus speed (0-2). Default: 1=U160. Speeds: 0=80 MB/s, 1=U160, 2=U320");
 150 module_param_named(log_level, ipr_log_level, uint, 0);
 151 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver");
 152 module_param_named(testmode, ipr_testmode, int, 0);
 153 MODULE_PARM_DESC(testmode, "DANGEROUS!!! Allows unsupported configurations");
 154 module_param_named(fastfail, ipr_fastfail, int, 0);
 155 MODULE_PARM_DESC(fastfail, "Reduce timeouts and retries");
 156 module_param_named(transop_timeout, ipr_transop_timeout, int, 0);
 157 MODULE_PARM_DESC(transop_timeout, "Time in seconds to wait for adapter to come operational (default: 300)");
 158 module_param_named(enable_cache, ipr_enable_cache, int, 0);
 159 MODULE_PARM_DESC(enable_cache, "Enable adapter's non-volatile write cache (default: 1)");
 160 module_param_named(debug, ipr_debug, int, 0);
 161 MODULE_PARM_DESC(debug, "Enable device driver debugging logging. Set to 1 to enable. (default: 0)");
 162 module_param_named(dual_ioa_raid, ipr_dual_ioa_raid, int, 0);
 163 MODULE_PARM_DESC(dual_ioa_raid, "Enable dual adapter RAID support. Set to 1 to enable. (default: 1)");
 164 MODULE_LICENSE("GPL");
 165 MODULE_VERSION(IPR_DRIVER_VERSION);
 166
 167 /*  A constant array of IOASCs/URCs/Error Messages */
 168 static const
 169 struct ipr_error_table_t ipr_error_table[] = {
 170         {0x00000000, 1, IPR_DEFAULT_LOG_LEVEL,
 171         "8155: An unknown error was received"},
 172         {0x00330000, 0, 0,
 173         "Soft underlength error"},
 174         {0x005A0000, 0, 0,
 175         "Command to be cancelled not found"},
 176         {0x00808000, 0, 0,
 177         "Qualified success"},
 178         {0x01080000, 1, IPR_DEFAULT_LOG_LEVEL,
 179         "FFFE: Soft device bus error recovered by the IOA"},
 180         {0x01088100, 0, IPR_DEFAULT_LOG_LEVEL,
 181         "4101: Soft device bus fabric error"},
 182         {0x01170600, 0, IPR_DEFAULT_LOG_LEVEL,
 183         "FFF9: Device sector reassign successful"},
 184         {0x01170900, 0, IPR_DEFAULT_LOG_LEVEL,
 185         "FFF7: Media error recovered by device rewrite procedures"},
 186         {0x01180200, 0, IPR_DEFAULT_LOG_LEVEL,
 187         "7001: IOA sector reassignment successful"},
 188         {0x01180500, 0, IPR_DEFAULT_LOG_LEVEL,
 189         "FFF9: Soft media error. Sector reassignment recommended"},
 190         {0x01180600, 0, IPR_DEFAULT_LOG_LEVEL,
 191         "FFF7: Media error recovered by IOA rewrite procedures"},
 192         {0x01418000, 0, IPR_DEFAULT_LOG_LEVEL,
 193         "FF3D: Soft PCI bus error recovered by the IOA"},
 194         {0x01440000, 1, IPR_DEFAULT_LOG_LEVEL,
 195         "FFF6: Device hardware error recovered by the IOA"},
 196         {0x01448100, 0, IPR_DEFAULT_LOG_LEVEL,
 197         "FFF6: Device hardware error recovered by the device"},
 198         {0x01448200, 1, IPR_DEFAULT_LOG_LEVEL,
 199         "FF3D: Soft IOA error recovered by the IOA"},
 200         {0x01448300, 0, IPR_DEFAULT_LOG_LEVEL,
 201         "FFFA: Undefined device response recovered by the IOA"},
 202         {0x014A0000, 1, IPR_DEFAULT_LOG_LEVEL,
 203         "FFF6: Device bus error, message or command phase"},
 204         {0x014A8000, 0, IPR_DEFAULT_LOG_LEVEL,
 205         "FFFE: Task Management Function failed"},
 206         {0x015D0000, 0, IPR_DEFAULT_LOG_LEVEL,
 207         "FFF6: Failure prediction threshold exceeded"},
 208         {0x015D9200, 0, IPR_DEFAULT_LOG_LEVEL,
 209         "8009: Impending cache battery pack failure"},
 210         {0x02040400, 0, 0,
 211         "34FF: Disk device format in progress"},
 212         {0x02048000, 0, IPR_DEFAULT_LOG_LEVEL,
 213         "9070: IOA requested reset"},
 214         {0x023F0000, 0, 0,
 215         "Synchronization required"},
 216         {0x024E0000, 0, 0,
 217         "No ready, IOA shutdown"},
 218         {0x025A0000, 0, 0,
 219         "Not ready, IOA has been shutdown"},
 220         {0x02670100, 0, IPR_DEFAULT_LOG_LEVEL,
 221         "3020: Storage subsystem configuration error"},
 222         {0x03110B00, 0, 0,
 223         "FFF5: Medium error, data unreadable, recommend reassign"},
 224         {0x03110C00, 0, 0,
 225         "7000: Medium error, data unreadable, do not reassign"},
 226         {0x03310000, 0, IPR_DEFAULT_LOG_LEVEL,
 227         "FFF3: Disk media format bad"},
 228         {0x04050000, 0, IPR_DEFAULT_LOG_LEVEL,
 229         "3002: Addressed device failed to respond to selection"},
 230         {0x04080000, 1, IPR_DEFAULT_LOG_LEVEL,
 231         "3100: Device bus error"},
 232         {0x04080100, 0, IPR_DEFAULT_LOG_LEVEL,
 233         "3109: IOA timed out a device command"},
 234         {0x04088000, 0, 0,
 235         "3120: SCSI bus is not operational"},
 236         {0x04088100, 0, IPR_DEFAULT_LOG_LEVEL,
 237         "4100: Hard device bus fabric error"},
 238         {0x04118000, 0, IPR_DEFAULT_LOG_LEVEL,
 239         "9000: IOA reserved area data check"},
 240         {0x04118100, 0, IPR_DEFAULT_LOG_LEVEL,
 241         "9001: IOA reserved area invalid data pattern"},
 242         {0x04118200, 0, IPR_DEFAULT_LOG_LEVEL,
 243         "9002: IOA reserved area LRC error"},
 244         {0x04320000, 0, IPR_DEFAULT_LOG_LEVEL,
 245         "102E: Out of alternate sectors for disk storage"},
 246         {0x04330000, 1, IPR_DEFAULT_LOG_LEVEL,
 247         "FFF4: Data transfer underlength error"},
 248         {0x04338000, 1, IPR_DEFAULT_LOG_LEVEL,
 249         "FFF4: Data transfer overlength error"},
 250         {0x043E0100, 0, IPR_DEFAULT_LOG_LEVEL,
 251         "3400: Logical unit failure"},
 252         {0x04408500, 0, IPR_DEFAULT_LOG_LEVEL,
 253         "FFF4: Device microcode is corrupt"},
 254         {0x04418000, 1, IPR_DEFAULT_LOG_LEVEL,
 255         "8150: PCI bus error"},
 256         {0x04430000, 1, 0,
 257         "Unsupported device bus message received"},
 258         {0x04440000, 1, IPR_DEFAULT_LOG_LEVEL,
 259         "FFF4: Disk device problem"},
 260         {0x04448200, 1, IPR_DEFAULT_LOG_LEVEL,
 261         "8150: Permanent IOA failure"},
 262         {0x04448300, 0, IPR_DEFAULT_LOG_LEVEL,
 263         "3010: Disk device returned wrong response to IOA"},
 264         {0x04448400, 0, IPR_DEFAULT_LOG_LEVEL,
 265         "8151: IOA microcode error"},
 266         {0x04448500, 0, 0,
 267         "Device bus status error"},
 268         {0x04448600, 0, IPR_DEFAULT_LOG_LEVEL,
 269         "8157: IOA error requiring IOA reset to recover"},
 270         {0x04448700, 0, 0,
 271         "ATA device status error"},
 272         {0x04490000, 0, 0,
 273         "Message reject received from the device"},
 274         {0x04449200, 0, IPR_DEFAULT_LOG_LEVEL,
 275         "8008: A permanent cache battery pack failure occurred"},
 276         {0x0444A000, 0, IPR_DEFAULT_LOG_LEVEL,
 277         "9090: Disk unit has been modified after the last known status"},
 278         {0x0444A200, 0, IPR_DEFAULT_LOG_LEVEL,
 279         "9081: IOA detected device error"},
 280         {0x0444A300, 0, IPR_DEFAULT_LOG_LEVEL,
 281         "9082: IOA detected device error"},
 282         {0x044A0000, 1, IPR_DEFAULT_LOG_LEVEL,
 283         "3110: Device bus error, message or command phase"},
 284         {0x044A8000, 1, IPR_DEFAULT_LOG_LEVEL,
 285         "3110: SAS Command / Task Management Function failed"},
 286         {0x04670400, 0, IPR_DEFAULT_LOG_LEVEL,
 287         "9091: Incorrect hardware configuration change has been detected"},
 288         {0x04678000, 0, IPR_DEFAULT_LOG_LEVEL,
 289         "9073: Invalid multi-adapter configuration"},
 290         {0x04678100, 0, IPR_DEFAULT_LOG_LEVEL,
 291         "4010: Incorrect connection between cascaded expanders"},
 292         {0x04678200, 0, IPR_DEFAULT_LOG_LEVEL,
 293         "4020: Connections exceed IOA design limits"},
 294         {0x04678300, 0, IPR_DEFAULT_LOG_LEVEL,
 295         "4030: Incorrect multipath connection"},
 296         {0x04679000, 0, IPR_DEFAULT_LOG_LEVEL,
 297         "4110: Unsupported enclosure function"},
 298         {0x046E0000, 0, IPR_DEFAULT_LOG_LEVEL,
 299         "FFF4: Command to logical unit failed"},
 300         {0x05240000, 1, 0,
 301         "Illegal request, invalid request type or request packet"},
 302         {0x05250000, 0, 0,
 303         "Illegal request, invalid resource handle"},
 304         {0x05258000, 0, 0,
 305         "Illegal request, commands not allowed to this device"},
 306         {0x05258100, 0, 0,
 307         "Illegal request, command not allowed to a secondary adapter"},
 308         {0x05260000, 0, 0,
 309         "Illegal request, invalid field in parameter list"},
 310         {0x05260100, 0, 0,
 311         "Illegal request, parameter not supported"},
 312         {0x05260200, 0, 0,
 313         "Illegal request, parameter value invalid"},
 314         {0x052C0000, 0, 0,
 315         "Illegal request, command sequence error"},
 316         {0x052C8000, 1, 0,
 317         "Illegal request, dual adapter support not enabled"},
 318         {0x06040500, 0, IPR_DEFAULT_LOG_LEVEL,
 319         "9031: Array protection temporarily suspended, protection resuming"},
 320         {0x06040600, 0, IPR_DEFAULT_LOG_LEVEL,
 321         "9040: Array protection temporarily suspended, protection resuming"},
 322         {0x06288000, 0, IPR_DEFAULT_LOG_LEVEL,
 323         "3140: Device bus not ready to ready transition"},
 324         {0x06290000, 0, IPR_DEFAULT_LOG_LEVEL,
 325         "FFFB: SCSI bus was reset"},
 326         {0x06290500, 0, 0,
 327         "FFFE: SCSI bus transition to single ended"},
 328         {0x06290600, 0, 0,
 329         "FFFE: SCSI bus transition to LVD"},
 330         {0x06298000, 0, IPR_DEFAULT_LOG_LEVEL,
 331         "FFFB: SCSI bus was reset by another initiator"},
 332         {0x063F0300, 0, IPR_DEFAULT_LOG_LEVEL,
 333         "3029: A device replacement has occurred"},
 334         {0x064C8000, 0, IPR_DEFAULT_LOG_LEVEL,
 335         "9051: IOA cache data exists for a missing or failed device"},
 336         {0x064C8100, 0, IPR_DEFAULT_LOG_LEVEL,
 337         "9055: Auxiliary cache IOA contains cache data needed by the primary IOA"},
 338         {0x06670100, 0, IPR_DEFAULT_LOG_LEVEL,
 339         "9025: Disk unit is not supported at its physical location"},
 340         {0x06670600, 0, IPR_DEFAULT_LOG_LEVEL,
 341         "3020: IOA detected a SCSI bus configuration error"},
 342         {0x06678000, 0, IPR_DEFAULT_LOG_LEVEL,
 343         "3150: SCSI bus configuration error"},
 344         {0x06678100, 0, IPR_DEFAULT_LOG_LEVEL,
 345         "9074: Asymmetric advanced function disk configuration"},
 346         {0x06678300, 0, IPR_DEFAULT_LOG_LEVEL,
 347         "4040: Incomplete multipath connection between IOA and enclosure"},
 348         {0x06678400, 0, IPR_DEFAULT_LOG_LEVEL,
 349         "4041: Incomplete multipath connection between enclosure and device"},
 350         {0x06678500, 0, IPR_DEFAULT_LOG_LEVEL,
 351         "9075: Incomplete multipath connection between IOA and remote IOA"},
 352         {0x06678600, 0, IPR_DEFAULT_LOG_LEVEL,
 353         "9076: Configuration error, missing remote IOA"},
 354         {0x06679100, 0, IPR_DEFAULT_LOG_LEVEL,
 355         "4050: Enclosure does not support a required multipath function"},
 356         {0x06690200, 0, IPR_DEFAULT_LOG_LEVEL,
 357         "9041: Array protection temporarily suspended"},
 358         {0x06698200, 0, IPR_DEFAULT_LOG_LEVEL,
 359         "9042: Corrupt array parity detected on specified device"},
 360         {0x066B0200, 0, IPR_DEFAULT_LOG_LEVEL,
 361         "9030: Array no longer protected due to missing or failed disk unit"},
 362         {0x066B8000, 0, IPR_DEFAULT_LOG_LEVEL,
 363         "9071: Link operational transition"},
 364         {0x066B8100, 0, IPR_DEFAULT_LOG_LEVEL,
 365         "9072: Link not operational transition"},
 366         {0x066B8200, 0, IPR_DEFAULT_LOG_LEVEL,
 367         "9032: Array exposed but still protected"},
 368         {0x066B8300, 0, IPR_DEFAULT_LOG_LEVEL + 1,
 369         "70DD: Device forced failed by disrupt device command"},
 370         {0x066B9100, 0, IPR_DEFAULT_LOG_LEVEL,
 371         "4061: Multipath redundancy level got better"},
 372         {0x066B9200, 0, IPR_DEFAULT_LOG_LEVEL,
 373         "4060: Multipath redundancy level got worse"},
 374         {0x07270000, 0, 0,
 375         "Failure due to other device"},
 376         {0x07278000, 0, IPR_DEFAULT_LOG_LEVEL,
 377         "9008: IOA does not support functions expected by devices"},
 378         {0x07278100, 0, IPR_DEFAULT_LOG_LEVEL,
 379         "9010: Cache data associated with attached devices cannot be found"},
 380         {0x07278200, 0, IPR_DEFAULT_LOG_LEVEL,
 381         "9011: Cache data belongs to devices other than those attached"},
 382         {0x07278400, 0, IPR_DEFAULT_LOG_LEVEL,
 383         "9020: Array missing 2 or more devices with only 1 device present"},
 384         {0x07278500, 0, IPR_DEFAULT_LOG_LEVEL,
 385         "9021: Array missing 2 or more devices with 2 or more devices present"},
 386         {0x07278600, 0, IPR_DEFAULT_LOG_LEVEL,
 387         "9022: Exposed array is missing a required device"},
 388         {0x07278700, 0, IPR_DEFAULT_LOG_LEVEL,
 389         "9023: Array member(s) not at required physical locations"},
 390         {0x07278800, 0, IPR_DEFAULT_LOG_LEVEL,
 391         "9024: Array not functional due to present hardware configuration"},
 392         {0x07278900, 0, IPR_DEFAULT_LOG_LEVEL,
 393         "9026: Array not functional due to present hardware configuration"},
 394         {0x07278A00, 0, IPR_DEFAULT_LOG_LEVEL,
 395         "9027: Array is missing a device and parity is out of sync"},
 396         {0x07278B00, 0, IPR_DEFAULT_LOG_LEVEL,
 397         "9028: Maximum number of arrays already exist"},
 398         {0x07278C00, 0, IPR_DEFAULT_LOG_LEVEL,
 399         "9050: Required cache data cannot be located for a disk unit"},
 400         {0x07278D00, 0, IPR_DEFAULT_LOG_LEVEL,
 401         "9052: Cache data exists for a device that has been modified"},
 402         {0x07278F00, 0, IPR_DEFAULT_LOG_LEVEL,
 403         "9054: IOA resources not available due to previous problems"},
 404         {0x07279100, 0, IPR_DEFAULT_LOG_LEVEL,
 405         "9092: Disk unit requires initialization before use"},
 406         {0x07279200, 0, IPR_DEFAULT_LOG_LEVEL,
 407         "9029: Incorrect hardware configuration change has been detected"},
 408         {0x07279600, 0, IPR_DEFAULT_LOG_LEVEL,
 409         "9060: One or more disk pairs are missing from an array"},
 410         {0x07279700, 0, IPR_DEFAULT_LOG_LEVEL,
 411         "9061: One or more disks are missing from an array"},
 412         {0x07279800, 0, IPR_DEFAULT_LOG_LEVEL,
 413         "9062: One or more disks are missing from an array"},
 414         {0x07279900, 0, IPR_DEFAULT_LOG_LEVEL,
 415         "9063: Maximum number of functional arrays has been exceeded"},
 416         {0x0B260000, 0, 0,
 417         "Aborted command, invalid descriptor"},
 418         {0x0B5A0000, 0, 0,
 419         "Command terminated by host"}
 420 };
 421
 422 static const struct ipr_ses_table_entry ipr_ses_table[] = {
 423         { "2104-DL1        ", "XXXXXXXXXXXXXXXX", 80 },
 424         { "2104-TL1        ", "XXXXXXXXXXXXXXXX", 80 },
 425         { "HSBP07M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 7 slot */
 426         { "HSBP05M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 5 slot */
 427         { "HSBP05M S U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Bowtie */
 428         { "HSBP06E ASU2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* MartinFenning */
 429         { "2104-DU3        ", "XXXXXXXXXXXXXXXX", 160 },
 430         { "2104-TU3        ", "XXXXXXXXXXXXXXXX", 160 },
 431         { "HSBP04C RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
 432         { "HSBP06E RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
 433         { "St  V1S2        ", "XXXXXXXXXXXXXXXX", 160 },
 434         { "HSBPD4M  PU3SCSI", "XXXXXXX*XXXXXXXX", 160 },
 435         { "VSBPD1H   U3SCSI", "XXXXXXX*XXXXXXXX", 160 }
 436 };
 437
 438 /*
 439  *  Function Prototypes
 440  */
 441 static int ipr_reset_alert(struct ipr_cmnd *);
 442 static void ipr_process_ccn(struct ipr_cmnd *);
 443 static void ipr_process_error(struct ipr_cmnd *);
 444 static void ipr_reset_ioa_job(struct ipr_cmnd *);
 445 static void ipr_initiate_ioa_reset(struct ipr_ioa_cfg *,
 446                                    enum ipr_shutdown_type);
 447
 448 #ifdef CONFIG_SCSI_IPR_TRACE
 449 /**
 450  * ipr_trc_hook - Add a trace entry to the driver trace
 451  * @ipr_cmd:    ipr command struct
 452  * @type:               trace type
 453  * @add_data:   additional data
 454  *
 455  * Return value:
 456  *      none
 457  **/
 458 static void ipr_trc_hook(struct ipr_cmnd *ipr_cmd,
 459                          u8 type, u32 add_data)
 460 {
 461         struct ipr_trace_entry *trace_entry;
 462         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
 463
 464         trace_entry = &ioa_cfg->trace[ioa_cfg->trace_index++];
 465         trace_entry->time = jiffies;
 466         trace_entry->op_code = ipr_cmd->ioarcb.cmd_pkt.cdb[0];
 467         trace_entry->type = type;
 468         trace_entry->ata_op_code = ipr_cmd->ioarcb.add_data.u.regs.command;
 469         trace_entry->cmd_index = ipr_cmd->cmd_index & 0xff;
 470         trace_entry->res_handle = ipr_cmd->ioarcb.res_handle;
 471         trace_entry->u.add_data = add_data;
 472 }
 473 #else
 474 #define ipr_trc_hook(ipr_cmd, type, add_data) do { } while(0)
 475 #endif
 476
 477 /**
 478  * ipr_reinit_ipr_cmnd - Re-initialize an IPR Cmnd block for reuse
 479  * @ipr_cmd:    ipr command struct
 480  *
 481  * Return value:
 482  *      none
 483  **/
 484 static void ipr_reinit_ipr_cmnd(struct ipr_cmnd *ipr_cmd)
 485 {
 486         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
 487         struct ipr_ioasa *ioasa = &ipr_cmd->ioasa;
 488         dma_addr_t dma_addr = be32_to_cpu(ioarcb->ioarcb_host_pci_addr);
 489
 490         memset(&ioarcb->cmd_pkt, 0, sizeof(struct ipr_cmd_pkt));
 491         ioarcb->write_data_transfer_length = 0;
 492         ioarcb->read_data_transfer_length = 0;
 493         ioarcb->write_ioadl_len = 0;
 494         ioarcb->read_ioadl_len = 0;
 495         ioarcb->write_ioadl_addr =
 496                 cpu_to_be32(dma_addr + offsetof(struct ipr_cmnd, ioadl));
 497         ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
 498         ioasa->ioasc = 0;
 499         ioasa->residual_data_len = 0;
 500         ioasa->u.gata.status = 0;
 501
 502         ipr_cmd->scsi_cmd = NULL;
 503         ipr_cmd->qc = NULL;
 504         ipr_cmd->sense_buffer[0] = 0;
 505         ipr_cmd->dma_use_sg = 0;
 506 }
 507
 508 /**
 509  * ipr_init_ipr_cmnd - Initialize an IPR Cmnd block
 510  * @ipr_cmd:    ipr command struct
 511  *
 512  * Return value:
 513  *      none
 514  **/
 515 static void ipr_init_ipr_cmnd(struct ipr_cmnd *ipr_cmd)
 516 {
 517         ipr_reinit_ipr_cmnd(ipr_cmd);
 518         ipr_cmd->u.scratch = 0;
 519         ipr_cmd->sibling = NULL;
 520         init_timer(&ipr_cmd->timer);
 521 }
 522
 523 /**
 524  * ipr_get_free_ipr_cmnd - Get a free IPR Cmnd block
 525  * @ioa_cfg:    ioa config struct
 526  *
 527  * Return value:
 528  *      pointer to ipr command struct
 529  **/
 530 static
 531 struct ipr_cmnd *ipr_get_free_ipr_cmnd(struct ipr_ioa_cfg *ioa_cfg)
 532 {
 533         struct ipr_cmnd *ipr_cmd;
 534
 535         ipr_cmd = list_entry(ioa_cfg->free_q.next, struct ipr_cmnd, queue);
 536         list_del(&ipr_cmd->queue);
 537         ipr_init_ipr_cmnd(ipr_cmd);
 538
 539         return ipr_cmd;
 540 }
 541
 542 /**
 543  * ipr_mask_and_clear_interrupts - Mask all and clear specified interrupts
 544  * @ioa_cfg:    ioa config struct
 545  * @clr_ints:     interrupts to clear
 546  *
 547  * This function masks all interrupts on the adapter, then clears the
 548  * interrupts specified in the mask
 549  *
 550  * Return value:
 551  *      none
 552  **/
 553 static void ipr_mask_and_clear_interrupts(struct ipr_ioa_cfg *ioa_cfg,
 554                                           u32 clr_ints)
 555 {
 556         volatile u32 int_reg;
 557
 558         /* Stop new interrupts */
 559         ioa_cfg->allow_interrupts = 0;
 560
 561         /* Set interrupt mask to stop all new interrupts */
 562         writel(~0, ioa_cfg->regs.set_interrupt_mask_reg);
 563
 564         /* Clear any pending interrupts */
 565         writel(clr_ints, ioa_cfg->regs.clr_interrupt_reg);
 566         int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
 567 }
 568
 569 /**
 570  * ipr_save_pcix_cmd_reg - Save PCI-X command register
 571  * @ioa_cfg:    ioa config struct
 572  *
 573  * Return value:
 574  *      0 on success / -EIO on failure
 575  **/
 576 static int ipr_save_pcix_cmd_reg(struct ipr_ioa_cfg *ioa_cfg)
 577 {
 578         int pcix_cmd_reg = pci_find_capability(ioa_cfg->pdev, PCI_CAP_ID_PCIX);
 579
 580         if (pcix_cmd_reg == 0)
 581                 return 0;
 582
 583         if (pci_read_config_word(ioa_cfg->pdev, pcix_cmd_reg + PCI_X_CMD,
 584                                  &ioa_cfg->saved_pcix_cmd_reg) != PCIBIOS_SUCCESSFUL) {
 585                 dev_err(&ioa_cfg->pdev->dev, "Failed to save PCI-X command register\n");
 586                 return -EIO;
 587         }
 588
 589         ioa_cfg->saved_pcix_cmd_reg |= PCI_X_CMD_DPERR_E | PCI_X_CMD_ERO;
 590         return 0;
 591 }
 592
 593 /**
 594  * ipr_set_pcix_cmd_reg - Setup PCI-X command register
 595  * @ioa_cfg:    ioa config struct
 596  *
 597  * Return value:
 598  *      0 on success / -EIO on failure
 599  **/
 600 static int ipr_set_pcix_cmd_reg(struct ipr_ioa_cfg *ioa_cfg)
 601 {
 602         int pcix_cmd_reg = pci_find_capability(ioa_cfg->pdev, PCI_CAP_ID_PCIX);
 603
 604         if (pcix_cmd_reg) {
 605                 if (pci_write_config_word(ioa_cfg->pdev, pcix_cmd_reg + PCI_X_CMD,
 606                                           ioa_cfg->saved_pcix_cmd_reg) != PCIBIOS_SUCCESSFUL) {
 607                         dev_err(&ioa_cfg->pdev->dev, "Failed to setup PCI-X command register\n");
 608                         return -EIO;
 609                 }
 610         }
 611
 612         return 0;
 613 }
 614
 615 /**
 616  * ipr_sata_eh_done - done function for aborted SATA commands
 617  * @ipr_cmd:    ipr command struct
 618  *
 619  * This function is invoked for ops generated to SATA
 620  * devices which are being aborted.
 621  *
 622  * Return value:
 623  *      none
 624  **/
 625 static void ipr_sata_eh_done(struct ipr_cmnd *ipr_cmd)
 626 {
 627         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
 628         struct ata_queued_cmd *qc = ipr_cmd->qc;
 629         struct ipr_sata_port *sata_port = qc->ap->private_data;
 630
 631         qc->err_mask |= AC_ERR_OTHER;
 632         sata_port->ioasa.status |= ATA_BUSY;
 633         list_add_tail(&ipr_cmd->queue, &ioa_cfg->free_q);
 634         ata_qc_complete(qc);
 635 }
 636
 637 /**
 638  * ipr_scsi_eh_done - mid-layer done function for aborted ops
 639  * @ipr_cmd:    ipr command struct
 640  *
 641  * This function is invoked by the interrupt handler for
 642  * ops generated by the SCSI mid-layer which are being aborted.
 643  *
 644  * Return value:
 645  *      none
 646  **/
 647 static void ipr_scsi_eh_done(struct ipr_cmnd *ipr_cmd)
 648 {
 649         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
 650         struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
 651
 652         scsi_cmd->result |= (DID_ERROR << 16);
 653
 654         scsi_dma_unmap(ipr_cmd->scsi_cmd);
 655         scsi_cmd->scsi_done(scsi_cmd);
 656         list_add_tail(&ipr_cmd->queue, &ioa_cfg->free_q);
 657 }
 658
 659 /**
 660  * ipr_fail_all_ops - Fails all outstanding ops.
 661  * @ioa_cfg:    ioa config struct
 662  *
 663  * This function fails all outstanding ops.
 664  *
 665  * Return value:
 666  *      none
 667  **/
 668 static void ipr_fail_all_ops(struct ipr_ioa_cfg *ioa_cfg)
 669 {
 670         struct ipr_cmnd *ipr_cmd, *temp;
 671
 672         ENTER;
 673         list_for_each_entry_safe(ipr_cmd, temp, &ioa_cfg->pending_q, queue) {
 674                 list_del(&ipr_cmd->queue);
 675
 676                 ipr_cmd->ioasa.ioasc = cpu_to_be32(IPR_IOASC_IOA_WAS_RESET);
 677                 ipr_cmd->ioasa.ilid = cpu_to_be32(IPR_DRIVER_ILID);
 678
 679                 if (ipr_cmd->scsi_cmd)
 680                         ipr_cmd->done = ipr_scsi_eh_done;
 681                 else if (ipr_cmd->qc)
 682                         ipr_cmd->done = ipr_sata_eh_done;
 683
 684                 ipr_trc_hook(ipr_cmd, IPR_TRACE_FINISH, IPR_IOASC_IOA_WAS_RESET);
 685                 del_timer(&ipr_cmd->timer);
 686                 ipr_cmd->done(ipr_cmd);
 687         }
 688
 689         LEAVE;
 690 }
 691
 692 /**
 693  * ipr_do_req -  Send driver initiated requests.
 694  * @ipr_cmd:            ipr command struct
 695  * @done:                       done function
 696  * @timeout_func:       timeout function
 697  * @timeout:            timeout value
 698  *
 699  * This function sends the specified command to the adapter with the
 700  * timeout given. The done function is invoked on command completion.
 701  *
 702  * Return value:
 703  *      none
 704  **/
 705 static void ipr_do_req(struct ipr_cmnd *ipr_cmd,
 706                        void (*done) (struct ipr_cmnd *),
 707                        void (*timeout_func) (struct ipr_cmnd *), u32 timeout)
 708 {
 709         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
 710
 711         list_add_tail(&ipr_cmd->queue, &ioa_cfg->pending_q);
 712
 713         ipr_cmd->done = done;
 714
 715         ipr_cmd->timer.data = (unsigned long) ipr_cmd;
 716         ipr_cmd->timer.expires = jiffies + timeout;
 717         ipr_cmd->timer.function = (void (*)(unsigned long))timeout_func;
 718
 719         add_timer(&ipr_cmd->timer);
 720
 721         ipr_trc_hook(ipr_cmd, IPR_TRACE_START, 0);
 722
 723         mb();
 724         writel(be32_to_cpu(ipr_cmd->ioarcb.ioarcb_host_pci_addr),
 725                ioa_cfg->regs.ioarrin_reg);
 726 }
 727
 728 /**
 729  * ipr_internal_cmd_done - Op done function for an internally generated op.
 730  * @ipr_cmd:    ipr command struct
 731  *
 732  * This function is the op done function for an internally generated,
 733  * blocking op. It simply wakes the sleeping thread.
 734  *
 735  * Return value:
 736  *      none
 737  **/
 738 static void ipr_internal_cmd_done(struct ipr_cmnd *ipr_cmd)
 739 {
 740         if (ipr_cmd->sibling)
 741                 ipr_cmd->sibling = NULL;
 742         else
 743                 complete(&ipr_cmd->completion);
 744 }
 745
 746 /**
 747  * ipr_send_blocking_cmd - Send command and sleep on its completion.
 748  * @ipr_cmd:    ipr command struct
 749  * @timeout_func:       function to invoke if command times out
 750  * @timeout:    timeout
 751  *
 752  * Return value:
 753  *      none
 754  **/
 755 static void ipr_send_blocking_cmd(struct ipr_cmnd *ipr_cmd,
 756                                   void (*timeout_func) (struct ipr_cmnd *ipr_cmd),
 757                                   u32 timeout)
 758 {
 759         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
 760
 761         init_completion(&ipr_cmd->completion);
 762         ipr_do_req(ipr_cmd, ipr_internal_cmd_done, timeout_func, timeout);
 763
 764         spin_unlock_irq(ioa_cfg->host->host_lock);
 765         wait_for_completion(&ipr_cmd->completion);
 766         spin_lock_irq(ioa_cfg->host->host_lock);
 767 }
 768
 769 /**
 770  * ipr_send_hcam - Send an HCAM to the adapter.
 771  * @ioa_cfg:    ioa config struct
 772  * @type:               HCAM type
 773  * @hostrcb:    hostrcb struct
 774  *
 775  * This function will send a Host Controlled Async command to the adapter.
 776  * If HCAMs are currently not allowed to be issued to the adapter, it will
 777  * place the hostrcb on the free queue.
 778  *
 779  * Return value:
 780  *      none
 781  **/
 782 static void ipr_send_hcam(struct ipr_ioa_cfg *ioa_cfg, u8 type,
 783                           struct ipr_hostrcb *hostrcb)
 784 {
 785         struct ipr_cmnd *ipr_cmd;
 786         struct ipr_ioarcb *ioarcb;
 787
 788         if (ioa_cfg->allow_cmds) {
 789                 ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
 790                 list_add_tail(&ipr_cmd->queue, &ioa_cfg->pending_q);
 791                 list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_pending_q);
 792
 793                 ipr_cmd->u.hostrcb = hostrcb;
 794                 ioarcb = &ipr_cmd->ioarcb;
 795
 796                 ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
 797                 ioarcb->cmd_pkt.request_type = IPR_RQTYPE_HCAM;
 798                 ioarcb->cmd_pkt.cdb[0] = IPR_HOST_CONTROLLED_ASYNC;
 799                 ioarcb->cmd_pkt.cdb[1] = type;
 800                 ioarcb->cmd_pkt.cdb[7] = (sizeof(hostrcb->hcam) >> 8) & 0xff;
 801                 ioarcb->cmd_pkt.cdb[8] = sizeof(hostrcb->hcam) & 0xff;
 802
 803                 ioarcb->read_data_transfer_length = cpu_to_be32(sizeof(hostrcb->hcam));
 804                 ioarcb->read_ioadl_len = cpu_to_be32(sizeof(struct ipr_ioadl_desc));
 805                 ipr_cmd->ioadl[0].flags_and_data_len =
 806                         cpu_to_be32(IPR_IOADL_FLAGS_READ_LAST | sizeof(hostrcb->hcam));
 807                 ipr_cmd->ioadl[0].address = cpu_to_be32(hostrcb->hostrcb_dma);
 808
 809                 if (type == IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE)
 810                         ipr_cmd->done = ipr_process_ccn;
 811                 else
 812                         ipr_cmd->done = ipr_process_error;
 813
 814                 ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_IOA_RES_ADDR);
 815
 816                 mb();
 817                 writel(be32_to_cpu(ipr_cmd->ioarcb.ioarcb_host_pci_addr),
 818                        ioa_cfg->regs.ioarrin_reg);
 819         } else {
 820                 list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_free_q);
 821         }
 822 }
 823
 824 /**
 825  * ipr_init_res_entry - Initialize a resource entry struct.
 826  * @res:        resource entry struct
 827  *
 828  * Return value:
 829  *      none
 830  **/
 831 static void ipr_init_res_entry(struct ipr_resource_entry *res)
 832 {
 833         res->needs_sync_complete = 0;
 834         res->in_erp = 0;
 835         res->add_to_ml = 0;
 836         res->del_from_ml = 0;
 837         res->resetting_device = 0;
 838         res->sdev = NULL;
 839         res->sata_port = NULL;
 840 }
 841
 842 /**
 843  * ipr_handle_config_change - Handle a config change from the adapter
 844  * @ioa_cfg:    ioa config struct
 845  * @hostrcb:    hostrcb
 846  *
 847  * Return value:
 848  *      none
 849  **/
 850 static void ipr_handle_config_change(struct ipr_ioa_cfg *ioa_cfg,
 851                               struct ipr_hostrcb *hostrcb)
 852 {
 853         struct ipr_resource_entry *res = NULL;
 854         struct ipr_config_table_entry *cfgte;
 855         u32 is_ndn = 1;
 856
 857         cfgte = &hostrcb->hcam.u.ccn.cfgte;
 858
 859         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
 860                 if (!memcmp(&res->cfgte.res_addr, &cfgte->res_addr,
 861                             sizeof(cfgte->res_addr))) {
 862                         is_ndn = 0;
 863                         break;
 864                 }
 865         }
 866
 867         if (is_ndn) {
 868                 if (list_empty(&ioa_cfg->free_res_q)) {
 869                         ipr_send_hcam(ioa_cfg,
 870                                       IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE,
 871                                       hostrcb);
 872                         return;
 873                 }
 874
 875                 res = list_entry(ioa_cfg->free_res_q.next,
 876                                  struct ipr_resource_entry, queue);
 877
 878                 list_del(&res->queue);
 879                 ipr_init_res_entry(res);
 880                 list_add_tail(&res->queue, &ioa_cfg->used_res_q);
 881         }
 882
 883         memcpy(&res->cfgte, cfgte, sizeof(struct ipr_config_table_entry));
 884
 885         if (hostrcb->hcam.notify_type == IPR_HOST_RCB_NOTIF_TYPE_REM_ENTRY) {
 886                 if (res->sdev) {
 887                         res->del_from_ml = 1;
 888                         res->cfgte.res_handle = IPR_INVALID_RES_HANDLE;
 889                         if (ioa_cfg->allow_ml_add_del)
 890                                 schedule_work(&ioa_cfg->work_q);
 891                 } else
 892                         list_move_tail(&res->queue, &ioa_cfg->free_res_q);
 893         } else if (!res->sdev) {
 894                 res->add_to_ml = 1;
 895                 if (ioa_cfg->allow_ml_add_del)
 896                         schedule_work(&ioa_cfg->work_q);
 897         }
 898
 899         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
 900 }
 901
 902 /**
 903  * ipr_process_ccn - Op done function for a CCN.
 904  * @ipr_cmd:    ipr command struct
 905  *
 906  * This function is the op done function for a configuration
 907  * change notification host controlled async from the adapter.
 908  *
 909  * Return value:
 910  *      none
 911  **/
 912 static void ipr_process_ccn(struct ipr_cmnd *ipr_cmd)
 913 {
 914         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
 915         struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
 916         u32 ioasc = be32_to_cpu(ipr_cmd->ioasa.ioasc);
 917
 918         list_del(&hostrcb->queue);
 919         list_add_tail(&ipr_cmd->queue, &ioa_cfg->free_q);
 920
 921         if (ioasc) {
 922                 if (ioasc != IPR_IOASC_IOA_WAS_RESET)
 923                         dev_err(&ioa_cfg->pdev->dev,
 924                                 "Host RCB failed with IOASC: 0x%08X\n", ioasc);
 925
 926                 ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
 927         } else {
 928                 ipr_handle_config_change(ioa_cfg, hostrcb);
 929         }
 930 }
 931
 932 /**
 933  * strip_and_pad_whitespace - Strip and pad trailing whitespace.
 934  * @i:          index into buffer
 935  * @buf:                string to modify
 936  *
 937  * This function will strip all trailing whitespace, pad the end
 938  * of the string with a single space, and NULL terminate the string.
 939  *
 940  * Return value:
 941  *      new length of string
 942  **/
 943 static int strip_and_pad_whitespace(int i, char *buf)
 944 {
 945         while (i && buf[i] == ' ')
 946                 i--;
 947         buf[i+1] = ' ';
 948         buf[i+2] = '\0';
 949         return i + 2;
 950 }
 951
 952 /**
 953  * ipr_log_vpd_compact - Log the passed extended VPD compactly.
 954  * @prefix:             string to print at start of printk
 955  * @hostrcb:    hostrcb pointer
 956  * @vpd:                vendor/product id/sn struct
 957  *
 958  * Return value:
 959  *      none
 960  **/
 961 static void ipr_log_vpd_compact(char *prefix, struct ipr_hostrcb *hostrcb,
 962                                 struct ipr_vpd *vpd)
 963 {
 964         char buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN + IPR_SERIAL_NUM_LEN + 3];
 965         int i = 0;
 966
 967         memcpy(buffer, vpd->vpids.vendor_id, IPR_VENDOR_ID_LEN);
 968         i = strip_and_pad_whitespace(IPR_VENDOR_ID_LEN - 1, buffer);
 969
 970         memcpy(&buffer[i], vpd->vpids.product_id, IPR_PROD_ID_LEN);
 971         i = strip_and_pad_whitespace(i + IPR_PROD_ID_LEN - 1, buffer);
 972
 973         memcpy(&buffer[i], vpd->sn, IPR_SERIAL_NUM_LEN);
 974         buffer[IPR_SERIAL_NUM_LEN + i] = '\0';
 975
 976         ipr_hcam_err(hostrcb, "%s VPID/SN: %s\n", prefix, buffer);
 977 }
 978
 979 /**
 980  * ipr_log_vpd - Log the passed VPD to the error log.
 981  * @vpd:                vendor/product id/sn struct
 982  *
 983  * Return value:
 984  *      none
 985  **/
 986 static void ipr_log_vpd(struct ipr_vpd *vpd)
 987 {
 988         char buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN
 989                     + IPR_SERIAL_NUM_LEN];
 990
 991         memcpy(buffer, vpd->vpids.vendor_id, IPR_VENDOR_ID_LEN);
 992         memcpy(buffer + IPR_VENDOR_ID_LEN, vpd->vpids.product_id,
 993                IPR_PROD_ID_LEN);
 994         buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN] = '\0';
 995         ipr_err("Vendor/Product ID: %s\n", buffer);
 996
 997         memcpy(buffer, vpd->sn, IPR_SERIAL_NUM_LEN);
 998         buffer[IPR_SERIAL_NUM_LEN] = '\0';
 999         ipr_err("    Serial Number: %s\n", buffer);
1000 }
1001
1002 /**
1003  * ipr_log_ext_vpd_compact - Log the passed extended VPD compactly.
1004  * @prefix:             string to print at start of printk
1005  * @hostrcb:    hostrcb pointer
1006  * @vpd:                vendor/product id/sn/wwn struct
1007  *
1008  * Return value:
1009  *      none
1010  **/
1011 static void ipr_log_ext_vpd_compact(char *prefix, struct ipr_hostrcb *hostrcb,
1012                                     struct ipr_ext_vpd *vpd)
1013 {
1014         ipr_log_vpd_compact(prefix, hostrcb, &vpd->vpd);
1015         ipr_hcam_err(hostrcb, "%s WWN: %08X%08X\n", prefix,
1016                      be32_to_cpu(vpd->wwid[0]), be32_to_cpu(vpd->wwid[1]));
1017 }
1018
1019 /**
1020  * ipr_log_ext_vpd - Log the passed extended VPD to the error log.
1021  * @vpd:                vendor/product id/sn/wwn struct
1022  *
1023  * Return value:
1024  *      none
1025  **/
1026 static void ipr_log_ext_vpd(struct ipr_ext_vpd *vpd)
1027 {
1028         ipr_log_vpd(&vpd->vpd);
1029         ipr_err("    WWN: %08X%08X\n", be32_to_cpu(vpd->wwid[0]),
1030                 be32_to_cpu(vpd->wwid[1]));
1031 }
1032
1033 /**
1034  * ipr_log_enhanced_cache_error - Log a cache error.
1035  * @ioa_cfg:    ioa config struct
1036  * @hostrcb:    hostrcb struct
1037  *
1038  * Return value:
1039  *      none
1040  **/
1041 static void ipr_log_enhanced_cache_error(struct ipr_ioa_cfg *ioa_cfg,
1042                                          struct ipr_hostrcb *hostrcb)
1043 {
1044         struct ipr_hostrcb_type_12_error *error =
1045                 &hostrcb->hcam.u.error.u.type_12_error;
1046
1047         ipr_err("-----Current Configuration-----\n");
1048         ipr_err("Cache Directory Card Information:\n");
1049         ipr_log_ext_vpd(&error->ioa_vpd);
1050         ipr_err("Adapter Card Information:\n");
1051         ipr_log_ext_vpd(&error->cfc_vpd);
1052
1053         ipr_err("-----Expected Configuration-----\n");
1054         ipr_err("Cache Directory Card Information:\n");
1055         ipr_log_ext_vpd(&error->ioa_last_attached_to_cfc_vpd);
1056         ipr_err("Adapter Card Information:\n");
1057         ipr_log_ext_vpd(&error->cfc_last_attached_to_ioa_vpd);
1058
1059         ipr_err("Additional IOA Data: %08X %08X %08X\n",
1060                      be32_to_cpu(error->ioa_data[0]),
1061                      be32_to_cpu(error->ioa_data[1]),
1062                      be32_to_cpu(error->ioa_data[2]));
1063 }
1064
1065 /**
1066  * ipr_log_cache_error - Log a cache error.
1067  * @ioa_cfg:    ioa config struct
1068  * @hostrcb:    hostrcb struct
1069  *
1070  * Return value:
1071  *      none
1072  **/
1073 static void ipr_log_cache_error(struct ipr_ioa_cfg *ioa_cfg,
1074                                 struct ipr_hostrcb *hostrcb)
1075 {
1076         struct ipr_hostrcb_type_02_error *error =
1077                 &hostrcb->hcam.u.error.u.type_02_error;
1078
1079         ipr_err("-----Current Configuration-----\n");
1080         ipr_err("Cache Directory Card Information:\n");
1081         ipr_log_vpd(&error->ioa_vpd);
1082         ipr_err("Adapter Card Information:\n");
1083         ipr_log_vpd(&error->cfc_vpd);
1084
1085         ipr_err("-----Expected Configuration-----\n");
1086         ipr_err("Cache Directory Card Information:\n");
1087         ipr_log_vpd(&error->ioa_last_attached_to_cfc_vpd);
1088         ipr_err("Adapter Card Information:\n");
1089         ipr_log_vpd(&error->cfc_last_attached_to_ioa_vpd);
1090
1091         ipr_err("Additional IOA Data: %08X %08X %08X\n",
1092                      be32_to_cpu(error->ioa_data[0]),
1093                      be32_to_cpu(error->ioa_data[1]),
1094                      be32_to_cpu(error->ioa_data[2]));
1095 }
1096
1097 /**
1098  * ipr_log_enhanced_config_error - Log a configuration error.
1099  * @ioa_cfg:    ioa config struct
1100  * @hostrcb:    hostrcb struct
1101  *
1102  * Return value:
1103  *      none
1104  **/
1105 static void ipr_log_enhanced_config_error(struct ipr_ioa_cfg *ioa_cfg,
1106                                           struct ipr_hostrcb *hostrcb)
1107 {
1108         int errors_logged, i;
1109         struct ipr_hostrcb_device_data_entry_enhanced *dev_entry;
1110         struct ipr_hostrcb_type_13_error *error;
1111
1112         error = &hostrcb->hcam.u.error.u.type_13_error;
1113         errors_logged = be32_to_cpu(error->errors_logged);
1114
1115         ipr_err("Device Errors Detected/Logged: %d/%d\n",
1116                 be32_to_cpu(error->errors_detected), errors_logged);
1117
1118         dev_entry = error->dev;
1119
1120         for (i = 0; i < errors_logged; i++, dev_entry++) {
1121                 ipr_err_separator;
1122
1123                 ipr_phys_res_err(ioa_cfg, dev_entry->dev_res_addr, "Device %d", i + 1);
1124                 ipr_log_ext_vpd(&dev_entry->vpd);
1125
1126                 ipr_err("-----New Device Information-----\n");
1127                 ipr_log_ext_vpd(&dev_entry->new_vpd);
1128
1129                 ipr_err("Cache Directory Card Information:\n");
1130                 ipr_log_ext_vpd(&dev_entry->ioa_last_with_dev_vpd);
1131
1132                 ipr_err("Adapter Card Information:\n");
1133                 ipr_log_ext_vpd(&dev_entry->cfc_last_with_dev_vpd);
1134         }
1135 }
1136
1137 /**
1138  * ipr_log_config_error - Log a configuration error.
1139  * @ioa_cfg:    ioa config struct
1140  * @hostrcb:    hostrcb struct
1141  *
1142  * Return value:
1143  *      none
1144  **/
1145 static void ipr_log_config_error(struct ipr_ioa_cfg *ioa_cfg,
1146                                  struct ipr_hostrcb *hostrcb)
1147 {
1148         int errors_logged, i;
1149         struct ipr_hostrcb_device_data_entry *dev_entry;
1150         struct ipr_hostrcb_type_03_error *error;
1151
1152         error = &hostrcb->hcam.u.error.u.type_03_error;
1153         errors_logged = be32_to_cpu(error->errors_logged);
1154
1155         ipr_err("Device Errors Detected/Logged: %d/%d\n",
1156                 be32_to_cpu(error->errors_detected), errors_logged);
1157
1158         dev_entry = error->dev;
1159
1160         for (i = 0; i < errors_logged; i++, dev_entry++) {
1161                 ipr_err_separator;
1162
1163                 ipr_phys_res_err(ioa_cfg, dev_entry->dev_res_addr, "Device %d", i + 1);
1164                 ipr_log_vpd(&dev_entry->vpd);
1165
1166                 ipr_err("-----New Device Information-----\n");
1167                 ipr_log_vpd(&dev_entry->new_vpd);
1168
1169                 ipr_err("Cache Directory Card Information:\n");
1170                 ipr_log_vpd(&dev_entry->ioa_last_with_dev_vpd);
1171
1172                 ipr_err("Adapter Card Information:\n");
1173                 ipr_log_vpd(&dev_entry->cfc_last_with_dev_vpd);
1174
1175                 ipr_err("Additional IOA Data: %08X %08X %08X %08X %08X\n",
1176                         be32_to_cpu(dev_entry->ioa_data[0]),
1177                         be32_to_cpu(dev_entry->ioa_data[1]),
1178                         be32_to_cpu(dev_entry->ioa_data[2]),
1179                         be32_to_cpu(dev_entry->ioa_data[3]),
1180                         be32_to_cpu(dev_entry->ioa_data[4]));
1181         }
1182 }
1183
1184 /**
1185  * ipr_log_enhanced_array_error - Log an array configuration error.
1186  * @ioa_cfg:    ioa config struct
1187  * @hostrcb:    hostrcb struct
1188  *
1189  * Return value:
1190  *      none
1191  **/
1192 static void ipr_log_enhanced_array_error(struct ipr_ioa_cfg *ioa_cfg,
1193                                          struct ipr_hostrcb *hostrcb)
1194 {
1195         int i, num_entries;
1196         struct ipr_hostrcb_type_14_error *error;
1197         struct ipr_hostrcb_array_data_entry_enhanced *array_entry;
1198         const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '0' };
1199
1200         error = &hostrcb->hcam.u.error.u.type_14_error;
1201
1202         ipr_err_separator;
1203
1204         ipr_err("RAID %s Array Configuration: %d:%d:%d:%d\n",
1205                 error->protection_level,
1206                 ioa_cfg->host->host_no,
1207                 error->last_func_vset_res_addr.bus,
1208                 error->last_func_vset_res_addr.target,
1209                 error->last_func_vset_res_addr.lun);
1210
1211         ipr_err_separator;
1212
1213         array_entry = error->array_member;
1214         num_entries = min_t(u32, be32_to_cpu(error->num_entries),
1215                             sizeof(error->array_member));
1216
1217         for (i = 0; i < num_entries; i++, array_entry++) {
1218                 if (!memcmp(array_entry->vpd.vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
1219                         continue;
1220
1221                 if (be32_to_cpu(error->exposed_mode_adn) == i)
1222                         ipr_err("Exposed Array Member %d:\n", i);
1223                 else
1224                         ipr_err("Array Member %d:\n", i);
1225
1226                 ipr_log_ext_vpd(&array_entry->vpd);
1227                 ipr_phys_res_err(ioa_cfg, array_entry->dev_res_addr, "Current Location");
1228                 ipr_phys_res_err(ioa_cfg, array_entry->expected_dev_res_addr,
1229                                  "Expected Location");
1230
1231                 ipr_err_separator;
1232         }
1233 }
1234
1235 /**
1236  * ipr_log_array_error - Log an array configuration error.
1237  * @ioa_cfg:    ioa config struct
1238  * @hostrcb:    hostrcb struct
1239  *
1240  * Return value:
1241  *      none
1242  **/
1243 static void ipr_log_array_error(struct ipr_ioa_cfg *ioa_cfg,
1244                                 struct ipr_hostrcb *hostrcb)
1245 {
1246         int i;
1247         struct ipr_hostrcb_type_04_error *error;
1248         struct ipr_hostrcb_array_data_entry *array_entry;
1249         const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '0' };
1250
1251         error = &hostrcb->hcam.u.error.u.type_04_error;
1252
1253         ipr_err_separator;
1254
1255         ipr_err("RAID %s Array Configuration: %d:%d:%d:%d\n",
1256                 error->protection_level,
1257                 ioa_cfg->host->host_no,
1258                 error->last_func_vset_res_addr.bus,
1259                 error->last_func_vset_res_addr.target,
1260                 error->last_func_vset_res_addr.lun);
1261
1262         ipr_err_separator;
1263
1264         array_entry = error->array_member;
1265
1266         for (i = 0; i < 18; i++) {
1267                 if (!memcmp(array_entry->vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
1268                         continue;
1269
1270                 if (be32_to_cpu(error->exposed_mode_adn) == i)
1271                         ipr_err("Exposed Array Member %d:\n", i);
1272                 else
1273                         ipr_err("Array Member %d:\n", i);
1274
1275                 ipr_log_vpd(&array_entry->vpd);
1276
1277                 ipr_phys_res_err(ioa_cfg, array_entry->dev_res_addr, "Current Location");
1278                 ipr_phys_res_err(ioa_cfg, array_entry->expected_dev_res_addr,
1279                                  "Expected Location");
1280
1281                 ipr_err_separator;
1282
1283                 if (i == 9)
1284                         array_entry = error->array_member2;
1285                 else
1286                         array_entry++;
1287         }
1288 }
1289
1290 /**
1291  * ipr_log_hex_data - Log additional hex IOA error data.
1292  * @ioa_cfg:    ioa config struct
1293  * @data:               IOA error data
1294  * @len:                data length
1295  *
1296  * Return value:
1297  *      none
1298  **/
1299 static void ipr_log_hex_data(struct ipr_ioa_cfg *ioa_cfg, u32 *data, int len)
1300 {
1301         int i;
1302
1303         if (len == 0)
1304                 return;
1305
1306         if (ioa_cfg->log_level <= IPR_DEFAULT_LOG_LEVEL)
1307                 len = min_t(int, len, IPR_DEFAULT_MAX_ERROR_DUMP);
1308
1309         for (i = 0; i < len / 4; i += 4) {
1310                 ipr_err("%08X: %08X %08X %08X %08X\n", i*4,
1311                         be32_to_cpu(data[i]),
1312                         be32_to_cpu(data[i+1]),
1313                         be32_to_cpu(data[i+2]),
1314                         be32_to_cpu(data[i+3]));
1315         }
1316 }
1317
1318 /**
1319  * ipr_log_enhanced_dual_ioa_error - Log an enhanced dual adapter error.
1320  * @ioa_cfg:    ioa config struct
1321  * @hostrcb:    hostrcb struct
1322  *
1323  * Return value:
1324  *      none
1325  **/
1326 static void ipr_log_enhanced_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
1327                                             struct ipr_hostrcb *hostrcb)
1328 {
1329         struct ipr_hostrcb_type_17_error *error;
1330
1331         error = &hostrcb->hcam.u.error.u.type_17_error;
1332         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
1333         strstrip(error->failure_reason);
1334
1335         ipr_hcam_err(hostrcb, "%s [PRC: %08X]\n", error->failure_reason,
1336                      be32_to_cpu(hostrcb->hcam.u.error.prc));
1337         ipr_log_ext_vpd_compact("Remote IOA", hostrcb, &error->vpd);
1338         ipr_log_hex_data(ioa_cfg, error->data,
1339                          be32_to_cpu(hostrcb->hcam.length) -
1340                          (offsetof(struct ipr_hostrcb_error, u) +
1341                           offsetof(struct ipr_hostrcb_type_17_error, data)));
1342 }
1343
1344 /**
1345  * ipr_log_dual_ioa_error - Log a dual adapter error.
1346  * @ioa_cfg:    ioa config struct
1347  * @hostrcb:    hostrcb struct
1348  *
1349  * Return value:
1350  *      none
1351  **/
1352 static void ipr_log_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
1353                                    struct ipr_hostrcb *hostrcb)
1354 {
1355         struct ipr_hostrcb_type_07_error *error;
1356
1357         error = &hostrcb->hcam.u.error.u.type_07_error;
1358         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
1359         strstrip(error->failure_reason);
1360
1361         ipr_hcam_err(hostrcb, "%s [PRC: %08X]\n", error->failure_reason,
1362                      be32_to_cpu(hostrcb->hcam.u.error.prc));
1363         ipr_log_vpd_compact("Remote IOA", hostrcb, &error->vpd);
1364         ipr_log_hex_data(ioa_cfg, error->data,
1365                          be32_to_cpu(hostrcb->hcam.length) -
1366                          (offsetof(struct ipr_hostrcb_error, u) +
1367                           offsetof(struct ipr_hostrcb_type_07_error, data)));
1368 }
1369
1370 static const struct {
1371         u8 active;
1372         char *desc;
1373 } path_active_desc[] = {
1374         { IPR_PATH_NO_INFO, "Path" },
1375         { IPR_PATH_ACTIVE, "Active path" },
1376         { IPR_PATH_NOT_ACTIVE, "Inactive path" }
1377 };
1378
1379 static const struct {
1380         u8 state;
1381         char *desc;
1382 } path_state_desc[] = {
1383         { IPR_PATH_STATE_NO_INFO, "has no path state information available" },
1384         { IPR_PATH_HEALTHY, "is healthy" },
1385         { IPR_PATH_DEGRADED, "is degraded" },
1386         { IPR_PATH_FAILED, "is failed" }
1387 };
1388
1389 /**
1390  * ipr_log_fabric_path - Log a fabric path error
1391  * @hostrcb:    hostrcb struct
1392  * @fabric:             fabric descriptor
1393  *
1394  * Return value:
1395  *      none
1396  **/
1397 static void ipr_log_fabric_path(struct ipr_hostrcb *hostrcb,
1398                                 struct ipr_hostrcb_fabric_desc *fabric)
1399 {
1400         int i, j;
1401         u8 path_state = fabric->path_state;
1402         u8 active = path_state & IPR_PATH_ACTIVE_MASK;
1403         u8 state = path_state & IPR_PATH_STATE_MASK;
1404
1405         for (i = 0; i < ARRAY_SIZE(path_active_desc); i++) {
1406                 if (path_active_desc[i].active != active)
1407                         continue;
1408
1409                 for (j = 0; j < ARRAY_SIZE(path_state_desc); j++) {
1410                         if (path_state_desc[j].state != state)
1411                                 continue;
1412
1413                         if (fabric->cascaded_expander == 0xff && fabric->phy == 0xff) {
1414                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d\n",
1415                                              path_active_desc[i].desc, path_state_desc[j].desc,
1416                                              fabric->ioa_port);
1417                         } else if (fabric->cascaded_expander == 0xff) {
1418                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Phy=%d\n",
1419                                              path_active_desc[i].desc, path_state_desc[j].desc,
1420                                              fabric->ioa_port, fabric->phy);
1421                         } else if (fabric->phy == 0xff) {
1422                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d\n",
1423                                              path_active_desc[i].desc, path_state_desc[j].desc,
1424                                              fabric->ioa_port, fabric->cascaded_expander);
1425                         } else {
1426                                 ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d, Phy=%d\n",
1427                                              path_active_desc[i].desc, path_state_desc[j].desc,
1428                                              fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
1429                         }
1430                         return;
1431                 }
1432         }
1433
1434         ipr_err("Path state=%02X IOA Port=%d Cascade=%d Phy=%d\n", path_state,
1435                 fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
1436 }
1437
1438 static const struct {
1439         u8 type;
1440         char *desc;
1441 } path_type_desc[] = {
1442         { IPR_PATH_CFG_IOA_PORT, "IOA port" },
1443         { IPR_PATH_CFG_EXP_PORT, "Expander port" },
1444         { IPR_PATH_CFG_DEVICE_PORT, "Device port" },
1445         { IPR_PATH_CFG_DEVICE_LUN, "Device LUN" }
1446 };
1447
1448 static const struct {
1449         u8 status;
1450         char *desc;
1451 } path_status_desc[] = {
1452         { IPR_PATH_CFG_NO_PROB, "Functional" },
1453         { IPR_PATH_CFG_DEGRADED, "Degraded" },
1454         { IPR_PATH_CFG_FAILED, "Failed" },
1455         { IPR_PATH_CFG_SUSPECT, "Suspect" },
1456         { IPR_PATH_NOT_DETECTED, "Missing" },
1457         { IPR_PATH_INCORRECT_CONN, "Incorrectly connected" }
1458 };
1459
1460 static const char *link_rate[] = {
1461         "unknown",
1462         "disabled",
1463         "phy reset problem",
1464         "spinup hold",
1465         "port selector",
1466         "unknown",
1467         "unknown",
1468         "unknown",
1469         "1.5Gbps",
1470         "3.0Gbps",
1471         "unknown",
1472         "unknown",
1473         "unknown",
1474         "unknown",
1475         "unknown",
1476         "unknown"
1477 };
1478
1479 /**
1480  * ipr_log_path_elem - Log a fabric path element.
1481  * @hostrcb:    hostrcb struct
1482  * @cfg:                fabric path element struct
1483  *
1484  * Return value:
1485  *      none
1486  **/
1487 static void ipr_log_path_elem(struct ipr_hostrcb *hostrcb,
1488                               struct ipr_hostrcb_config_element *cfg)
1489 {
1490         int i, j;
1491         u8 type = cfg->type_status & IPR_PATH_CFG_TYPE_MASK;
1492         u8 status = cfg->type_status & IPR_PATH_CFG_STATUS_MASK;
1493
1494         if (type == IPR_PATH_CFG_NOT_EXIST)
1495                 return;
1496
1497         for (i = 0; i < ARRAY_SIZE(path_type_desc); i++) {
1498                 if (path_type_desc[i].type != type)
1499                         continue;
1500
1501                 for (j = 0; j < ARRAY_SIZE(path_status_desc); j++) {
1502                         if (path_status_desc[j].status != status)
1503                                 continue;
1504
1505                         if (type == IPR_PATH_CFG_IOA_PORT) {
1506                                 ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, WWN=%08X%08X\n",
1507                                              path_status_desc[j].desc, path_type_desc[i].desc,
1508                                              cfg->phy, link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
1509                                              be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
1510                         } else {
1511                                 if (cfg->cascaded_expander == 0xff && cfg->phy == 0xff) {
1512                                         ipr_hcam_err(hostrcb, "%s %s: Link rate=%s, WWN=%08X%08X\n",
1513                                                      path_status_desc[j].desc, path_type_desc[i].desc,
1514                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
1515                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
1516                                 } else if (cfg->cascaded_expander == 0xff) {
1517                                         ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, "
1518                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
1519                                                      path_type_desc[i].desc, cfg->phy,
1520                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
1521                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
1522                                 } else if (cfg->phy == 0xff) {
1523                                         ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Link rate=%s, "
1524                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
1525                                                      path_type_desc[i].desc, cfg->cascaded_expander,
1526                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
1527                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
1528                                 } else {
1529                                         ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Phy=%d, Link rate=%s "
1530                                                      "WWN=%08X%08X\n", path_status_desc[j].desc,
1531                                                      path_type_desc[i].desc, cfg->cascaded_expander, cfg->phy,
1532                                                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
1533                                                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
1534                                 }
1535                         }
1536                         return;
1537                 }
1538         }
1539
1540         ipr_hcam_err(hostrcb, "Path element=%02X: Cascade=%d Phy=%d Link rate=%s "
1541                      "WWN=%08X%08X\n", cfg->type_status, cfg->cascaded_expander, cfg->phy,
1542                      link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
1543                      be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
1544 }
1545
1546 /**
1547  * ipr_log_fabric_error - Log a fabric error.
1548  * @ioa_cfg:    ioa config struct
1549  * @hostrcb:    hostrcb struct
1550  *
1551  * Return value:
1552  *      none
1553  **/
1554 static void ipr_log_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
1555                                  struct ipr_hostrcb *hostrcb)
1556 {
1557         struct ipr_hostrcb_type_20_error *error;
1558         struct ipr_hostrcb_fabric_desc *fabric;
1559         struct ipr_hostrcb_config_element *cfg;
1560         int i, add_len;
1561
1562         error = &hostrcb->hcam.u.error.u.type_20_error;
1563         error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
1564         ipr_hcam_err(hostrcb, "%s\n", error->failure_reason);
1565
1566         add_len = be32_to_cpu(hostrcb->hcam.length) -
1567                 (offsetof(struct ipr_hostrcb_error, u) +
1568                  offsetof(struct ipr_hostrcb_type_20_error, desc));
1569
1570         for (i = 0, fabric = error->desc; i < error->num_entries; i++) {
1571                 ipr_log_fabric_path(hostrcb, fabric);
1572                 for_each_fabric_cfg(fabric, cfg)
1573                         ipr_log_path_elem(hostrcb, cfg);
1574
1575                 add_len -= be16_to_cpu(fabric->length);
1576                 fabric = (struct ipr_hostrcb_fabric_desc *)
1577                         ((unsigned long)fabric + be16_to_cpu(fabric->length));
1578         }
1579
1580         ipr_log_hex_data(ioa_cfg, (u32 *)fabric, add_len);
1581 }
1582
1583 /**
1584  * ipr_log_generic_error - Log an adapter error.
1585  * @ioa_cfg:    ioa config struct
1586  * @hostrcb:    hostrcb struct
1587  *
1588  * Return value:
1589  *      none
1590  **/
1591 static void ipr_log_generic_error(struct ipr_ioa_cfg *ioa_cfg,
1592                                   struct ipr_hostrcb *hostrcb)
1593 {
1594         ipr_log_hex_data(ioa_cfg, hostrcb->hcam.u.raw.data,
1595                          be32_to_cpu(hostrcb->hcam.length));
1596 }
1597
1598 /**
1599  * ipr_get_error - Find the specfied IOASC in the ipr_error_table.
1600  * @ioasc:      IOASC
1601  *
1602  * This function will return the index of into the ipr_error_table
1603  * for the specified IOASC. If the IOASC is not in the table,
1604  * 0 will be returned, which points to the entry used for unknown errors.
1605  *
1606  * Return value:
1607  *      index into the ipr_error_table
1608  **/
1609 static u32 ipr_get_error(u32 ioasc)
1610 {
1611         int i;
1612
1613         for (i = 0; i < ARRAY_SIZE(ipr_error_table); i++)
1614                 if (ipr_error_table[i].ioasc == (ioasc & IPR_IOASC_IOASC_MASK))
1615                         return i;
1616
1617         return 0;
1618 }
1619
1620 /**
1621  * ipr_handle_log_data - Log an adapter error.
1622  * @ioa_cfg:    ioa config struct
1623  * @hostrcb:    hostrcb struct
1624  *
1625  * This function logs an adapter error to the system.
1626  *
1627  * Return value:
1628  *      none
1629  **/
1630 static void ipr_handle_log_data(struct ipr_ioa_cfg *ioa_cfg,
1631                                 struct ipr_hostrcb *hostrcb)
1632 {
1633         u32 ioasc;
1634         int error_index;
1635
1636         if (hostrcb->hcam.notify_type != IPR_HOST_RCB_NOTIF_TYPE_ERROR_LOG_ENTRY)
1637                 return;
1638
1639         if (hostrcb->hcam.notifications_lost == IPR_HOST_RCB_NOTIFICATIONS_LOST)
1640                 dev_err(&ioa_cfg->pdev->dev, "Error notifications lost\n");
1641
1642         ioasc = be32_to_cpu(hostrcb->hcam.u.error.failing_dev_ioasc);
1643
1644         if (ioasc == IPR_IOASC_BUS_WAS_RESET ||
1645             ioasc == IPR_IOASC_BUS_WAS_RESET_BY_OTHER) {
1646                 /* Tell the midlayer we had a bus reset so it will handle the UA properly */
1647                 scsi_report_bus_reset(ioa_cfg->host,
1648                                       hostrcb->hcam.u.error.failing_dev_res_addr.bus);
1649         }
1650
1651         error_index = ipr_get_error(ioasc);
1652
1653         if (!ipr_error_table[error_index].log_hcam)
1654                 return;
1655
1656         ipr_hcam_err(hostrcb, "%s\n", ipr_error_table[error_index].error);
1657
1658         /* Set indication we have logged an error */
1659         ioa_cfg->errors_logged++;
1660
1661         if (ioa_cfg->log_level < ipr_error_table[error_index].log_hcam)
1662                 return;
1663         if (be32_to_cpu(hostrcb->hcam.length) > sizeof(hostrcb->hcam.u.raw))
1664                 hostrcb->hcam.length = cpu_to_be32(sizeof(hostrcb->hcam.u.raw));
1665
1666         switch (hostrcb->hcam.overlay_id) {
1667         case IPR_HOST_RCB_OVERLAY_ID_2:
1668                 ipr_log_cache_error(ioa_cfg, hostrcb);
1669                 break;
1670         case IPR_HOST_RCB_OVERLAY_ID_3:
1671                 ipr_log_config_error(ioa_cfg, hostrcb);
1672                 break;
1673         case IPR_HOST_RCB_OVERLAY_ID_4:
1674         case IPR_HOST_RCB_OVERLAY_ID_6:
1675                 ipr_log_array_error(ioa_cfg, hostrcb);
1676                 break;
1677         case IPR_HOST_RCB_OVERLAY_ID_7:
1678                 ipr_log_dual_ioa_error(ioa_cfg, hostrcb);
1679                 break;
1680         case IPR_HOST_RCB_OVERLAY_ID_12:
1681                 ipr_log_enhanced_cache_error(ioa_cfg, hostrcb);
1682                 break;
1683         case IPR_HOST_RCB_OVERLAY_ID_13:
1684                 ipr_log_enhanced_config_error(ioa_cfg, hostrcb);
1685                 break;
1686         case IPR_HOST_RCB_OVERLAY_ID_14:
1687         case IPR_HOST_RCB_OVERLAY_ID_16:
1688                 ipr_log_enhanced_array_error(ioa_cfg, hostrcb);
1689                 break;
1690         case IPR_HOST_RCB_OVERLAY_ID_17:
1691                 ipr_log_enhanced_dual_ioa_error(ioa_cfg, hostrcb);
1692                 break;
1693         case IPR_HOST_RCB_OVERLAY_ID_20:
1694                 ipr_log_fabric_error(ioa_cfg, hostrcb);
1695                 break;
1696         case IPR_HOST_RCB_OVERLAY_ID_1:
1697         case IPR_HOST_RCB_OVERLAY_ID_DEFAULT:
1698         default:
1699                 ipr_log_generic_error(ioa_cfg, hostrcb);
1700                 break;
1701         }
1702 }
1703
1704 /**
1705  * ipr_process_error - Op done function for an adapter error log.
1706  * @ipr_cmd:    ipr command struct
1707  *
1708  * This function is the op done function for an error log host
1709  * controlled async from the adapter. It will log the error and
1710  * send the HCAM back to the adapter.
1711  *
1712  * Return value:
1713  *      none
1714  **/
1715 static void ipr_process_error(struct ipr_cmnd *ipr_cmd)
1716 {
1717         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
1718         struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
1719         u32 ioasc = be32_to_cpu(ipr_cmd->ioasa.ioasc);
1720         u32 fd_ioasc = be32_to_cpu(hostrcb->hcam.u.error.failing_dev_ioasc);
1721
1722         list_del(&hostrcb->queue);
1723         list_add_tail(&ipr_cmd->queue, &ioa_cfg->free_q);
1724
1725         if (!ioasc) {
1726                 ipr_handle_log_data(ioa_cfg, hostrcb);
1727                 if (fd_ioasc == IPR_IOASC_NR_IOA_RESET_REQUIRED)
1728                         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_ABBREV);
1729         } else if (ioasc != IPR_IOASC_IOA_WAS_RESET) {
1730                 dev_err(&ioa_cfg->pdev->dev,
1731                         "Host RCB failed with IOASC: 0x%08X\n", ioasc);
1732         }
1733
1734         ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
1735 }
1736
1737 /**
1738  * ipr_timeout -  An internally generated op has timed out.
1739  * @ipr_cmd:    ipr command struct
1740  *
1741  * This function blocks host requests and initiates an
1742  * adapter reset.
1743  *
1744  * Return value:
1745  *      none
1746  **/
1747 static void ipr_timeout(struct ipr_cmnd *ipr_cmd)
1748 {
1749         unsigned long lock_flags = 0;
1750         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
1751
1752         ENTER;
1753         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
1754
1755         ioa_cfg->errors_logged++;
1756         dev_err(&ioa_cfg->pdev->dev,
1757                 "Adapter being reset due to command timeout.\n");
1758
1759         if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
1760                 ioa_cfg->sdt_state = GET_DUMP;
1761
1762         if (!ioa_cfg->in_reset_reload || ioa_cfg->reset_cmd == ipr_cmd)
1763                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
1764
1765         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
1766         LEAVE;
1767 }
1768
1769 /**
1770  * ipr_oper_timeout -  Adapter timed out transitioning to operational
1771  * @ipr_cmd:    ipr command struct
1772  *
1773  * This function blocks host requests and initiates an
1774  * adapter reset.
1775  *
1776  * Return value:
1777  *      none
1778  **/
1779 static void ipr_oper_timeout(struct ipr_cmnd *ipr_cmd)
1780 {
1781         unsigned long lock_flags = 0;
1782         struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
1783
1784         ENTER;
1785         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
1786
1787         ioa_cfg->errors_logged++;
1788         dev_err(&ioa_cfg->pdev->dev,
1789                 "Adapter timed out transitioning to operational.\n");
1790
1791         if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
1792                 ioa_cfg->sdt_state = GET_DUMP;
1793
1794         if (!ioa_cfg->in_reset_reload || ioa_cfg->reset_cmd == ipr_cmd) {
1795                 if (ipr_fastfail)
1796                         ioa_cfg->reset_retries += IPR_NUM_RESET_RELOAD_RETRIES;
1797                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
1798         }
1799
1800         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
1801         LEAVE;
1802 }
1803
1804 /**
1805  * ipr_reset_reload - Reset/Reload the IOA
1806  * @ioa_cfg:            ioa config struct
1807  * @shutdown_type:      shutdown type
1808  *
1809  * This function resets the adapter and re-initializes it.
1810  * This function assumes that all new host commands have been stopped.
1811  * Return value:
1812  *      SUCCESS / FAILED
1813  **/
1814 static int ipr_reset_reload(struct ipr_ioa_cfg *ioa_cfg,
1815                             enum ipr_shutdown_type shutdown_type)
1816 {
1817         if (!ioa_cfg->in_reset_reload)
1818                 ipr_initiate_ioa_reset(ioa_cfg, shutdown_type);
1819
1820         spin_unlock_irq(ioa_cfg->host->host_lock);
1821         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
1822         spin_lock_irq(ioa_cfg->host->host_lock);
1823
1824         /* If we got hit with a host reset while we were already resetting
1825          the adapter for some reason, and the reset failed. */
1826         if (ioa_cfg->ioa_is_dead) {
1827                 ipr_trace;
1828                 return FAILED;
1829         }
1830
1831         return SUCCESS;
1832 }
1833
1834 /**
1835  * ipr_find_ses_entry - Find matching SES in SES table
1836  * @res:        resource entry struct of SES
1837  *
1838  * Return value:
1839  *      pointer to SES table entry / NULL on failure
1840  **/
1841 static const struct ipr_ses_table_entry *
1842 ipr_find_ses_entry(struct ipr_resource_entry *res)
1843 {
1844         int i, j, matches;
1845         const struct ipr_ses_table_entry *ste = ipr_ses_table;
1846
1847         for (i = 0; i < ARRAY_SIZE(ipr_ses_table); i++, ste++) {
1848                 for (j = 0, matches = 0; j < IPR_PROD_ID_LEN; j++) {
1849                         if (ste->compare_product_id_byte[j] == 'X') {
1850                                 if (res->cfgte.std_inq_data.vpids.product_id[j] == ste->product_id[j])
1851                                         matches++;
1852                                 else
1853                                         break;
1854                         } else
1855                                 matches++;
1856                 }
1857
1858                 if (matches == IPR_PROD_ID_LEN)
1859                         return ste;
1860         }
1861
1862         return NULL;
1863 }
1864
1865 /**
1866  * ipr_get_max_scsi_speed - Determine max SCSI speed for a given bus
1867  * @ioa_cfg:    ioa config struct
1868  * @bus:                SCSI bus
1869  * @bus_width:  bus width
1870  *
1871  * Return value:
1872  *      SCSI bus speed in units of 100KHz, 1600 is 160 MHz
1873  *      For a 2-byte wide SCSI bus, the maximum transfer speed is
1874  *      twice the maximum transfer rate (e.g. for a wide enabled bus,
1875  *      max 160MHz = max 320MB/sec).
1876  **/
1877 static u32 ipr_get_max_scsi_speed(struct ipr_ioa_cfg *ioa_cfg, u8 bus, u8 bus_width)
1878 {
1879         struct ipr_resource_entry *res;
1880         const struct ipr_ses_table_entry *ste;
1881         u32 max_xfer_rate = IPR_MAX_SCSI_RATE(bus_width);
1882
1883         /* Loop through each config table entry in the config table buffer */
1884         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
1885                 if (!(IPR_IS_SES_DEVICE(res->cfgte.std_inq_data)))
1886                         continue;
1887
1888                 if (bus != res->cfgte.res_addr.bus)
1889                         continue;
1890
1891                 if (!(ste = ipr_find_ses_entry(res)))
1892                         continue;
1893
1894                 max_xfer_rate = (ste->max_bus_speed_limit * 10) / (bus_width / 8);
1895         }
1896
1897         return max_xfer_rate;
1898 }
1899
1900 /**
1901  * ipr_wait_iodbg_ack - Wait for an IODEBUG ACK from the IOA
1902  * @ioa_cfg:            ioa config struct
1903  * @max_delay:          max delay in micro-seconds to wait
1904  *
1905  * Waits for an IODEBUG ACK from the IOA, doing busy looping.
1906  *
1907  * Return value:
1908  *      0 on success / other on failure
1909  **/
1910 static int ipr_wait_iodbg_ack(struct ipr_ioa_cfg *ioa_cfg, int max_delay)
1911 {
1912         volatile u32 pcii_reg;
1913         int delay = 1;
1914
1915         /* Read interrupt reg until IOA signals IO Debug Acknowledge */
1916         while (delay < max_delay) {
1917                 pcii_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
1918
1919                 if (pcii_reg & IPR_PCII_IO_DEBUG_ACKNOWLEDGE)
1920                         return 0;
1921
1922                 /* udelay cannot be used if delay is more than a few milliseconds */
1923                 if ((delay / 1000) > MAX_UDELAY_MS)
1924                         mdelay(delay / 1000);
1925                 else
1926                         udelay(delay);
1927
1928                 delay += delay;
1929         }
1930         return -EIO;
1931 }
1932
1933 /**
1934  * ipr_get_ldump_data_section - Dump IOA memory
1935  * @ioa_cfg:                    ioa config struct
1936  * @start_addr:                 adapter address to dump
1937  * @dest:                               destination kernel buffer
1938  * @length_in_words:    length to dump in 4 byte words
1939  *
1940  * Return value:
1941  *      0 on success / -EIO on failure
1942  **/
1943 static int ipr_get_ldump_data_section(struct ipr_ioa_cfg *ioa_cfg,
1944                                       u32 start_addr,
1945                                       __be32 *dest, u32 length_in_words)
1946 {
1947         volatile u32 temp_pcii_reg;
1948         int i, delay = 0;
1949
1950         /* Write IOA interrupt reg starting LDUMP state  */
1951         writel((IPR_UPROCI_RESET_ALERT | IPR_UPROCI_IO_DEBUG_ALERT),
1952                ioa_cfg->regs.set_uproc_interrupt_reg);
1953
1954         /* Wait for IO debug acknowledge */
1955         if (ipr_wait_iodbg_ack(ioa_cfg,
1956                                IPR_LDUMP_MAX_LONG_ACK_DELAY_IN_USEC)) {
1957                 dev_err(&ioa_cfg->pdev->dev,
1958                         "IOA dump long data transfer timeout\n");
1959                 return -EIO;
1960         }
1961
1962         /* Signal LDUMP interlocked - clear IO debug ack */
1963         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
1964                ioa_cfg->regs.clr_interrupt_reg);
1965
1966         /* Write Mailbox with starting address */
1967         writel(start_addr, ioa_cfg->ioa_mailbox);
1968
1969         /* Signal address valid - clear IOA Reset alert */
1970         writel(IPR_UPROCI_RESET_ALERT,
1971                ioa_cfg->regs.clr_uproc_interrupt_reg);
1972
1973         for (i = 0; i < length_in_words; i++) {
1974                 /* Wait for IO debug acknowledge */
1975                 if (ipr_wait_iodbg_ack(ioa_cfg,
1976                                        IPR_LDUMP_MAX_SHORT_ACK_DELAY_IN_USEC)) {
1977                         dev_err(&ioa_cfg->pdev->dev,
1978                                 "IOA dump short data transfer timeout\n");
1979                         return -EIO;
1980                 }
1981
1982                 /* Read data from mailbox and increment destination pointer */
1983                 *dest = cpu_to_be32(readl(ioa_cfg->ioa_mailbox));
1984                 dest++;
1985
1986                 /* For all but the last word of data, signal data received */
1987                 if (i < (length_in_words - 1)) {
1988                         /* Signal dump data received - Clear IO debug Ack */
1989                         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
1990                                ioa_cfg->regs.clr_interrupt_reg);
1991                 }
1992         }
1993
1994         /* Signal end of block transfer. Set reset alert then clear IO debug ack */
1995         writel(IPR_UPROCI_RESET_ALERT,
1996                ioa_cfg->regs.set_uproc_interrupt_reg);
1997
1998         writel(IPR_UPROCI_IO_DEBUG_ALERT,
1999                ioa_cfg->regs.clr_uproc_interrupt_reg);
2000
2001         /* Signal dump data received - Clear IO debug Ack */
2002         writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2003                ioa_cfg->regs.clr_interrupt_reg);
2004
2005         /* Wait for IOA to signal LDUMP exit - IOA reset alert will be cleared */
2006         while (delay < IPR_LDUMP_MAX_SHORT_ACK_DELAY_IN_USEC) {
2007                 temp_pcii_reg =
2008                     readl(ioa_cfg->regs.sense_uproc_interrupt_reg);
2009
2010                 if (!(temp_pcii_reg & IPR_UPROCI_RESET_ALERT))
2011                         return 0;
2012
2013                 udelay(10);
2014                 delay += 10;
2015         }
2016
2017         return 0;
2018 }
2019
2020 #ifdef CONFIG_SCSI_IPR_DUMP
2021 /**
2022  * ipr_sdt_copy - Copy Smart Dump Table to kernel buffer
2023  * @ioa_cfg:            ioa config struct
2024  * @pci_address:        adapter address
2025  * @length:                     length of data to copy
2026  *
2027  * Copy data from PCI adapter to kernel buffer.
2028  * Note: length MUST be a 4 byte multiple
2029  * Return value:
2030  *      0 on success / other on failure
2031  **/
2032 static int ipr_sdt_copy(struct ipr_ioa_cfg *ioa_cfg,
2033                         unsigned long pci_address, u32 length)
2034 {
2035         int bytes_copied = 0;
2036         int cur_len, rc, rem_len, rem_page_len;
2037         __be32 *page;
2038         unsigned long lock_flags = 0;
2039         struct ipr_ioa_dump *ioa_dump = &ioa_cfg->dump->ioa_dump;
2040
2041         while (bytes_copied < length &&
2042                (ioa_dump->hdr.len + bytes_copied) < IPR_MAX_IOA_DUMP_SIZE) {
2043                 if (ioa_dump->page_offset >= PAGE_SIZE ||
2044                     ioa_dump->page_offset == 0) {
2045                         page = (__be32 *)__get_free_page(GFP_ATOMIC);
2046
2047                         if (!page) {
2048                                 ipr_trace;
2049                                 return bytes_copied;
2050                         }
2051
2052                         ioa_dump->page_offset = 0;
2053                         ioa_dump->ioa_data[ioa_dump->next_page_index] = page;
2054                         ioa_dump->next_page_index++;
2055                 } else
2056                         page = ioa_dump->ioa_data[ioa_dump->next_page_index - 1];
2057
2058                 rem_len = length - bytes_copied;
2059                 rem_page_len = PAGE_SIZE - ioa_dump->page_offset;
2060                 cur_len = min(rem_len, rem_page_len);
2061
2062                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2063                 if (ioa_cfg->sdt_state == ABORT_DUMP) {
2064                         rc = -EIO;
2065                 } else {
2066                         rc = ipr_get_ldump_data_section(ioa_cfg,
2067                                                         pci_address + bytes_copied,
2068                                                         &page[ioa_dump->page_offset / 4],
2069                                                         (cur_len / sizeof(u32)));
2070                 }
2071                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2072
2073                 if (!rc) {
2074                         ioa_dump->page_offset += cur_len;
2075                         bytes_copied += cur_len;
2076                 } else {
2077                         ipr_trace;
2078                         break;
2079                 }
2080                 schedule();
2081         }
2082
2083         return bytes_copied;
2084 }
2085
2086 /**
2087  * ipr_init_dump_entry_hdr - Initialize a dump entry header.
2088  * @hdr:        dump entry header struct
2089  *
2090  * Return value:
2091  *      nothing
2092  **/
2093 static void ipr_init_dump_entry_hdr(struct ipr_dump_entry_header *hdr)
2094 {
2095         hdr->eye_catcher = IPR_DUMP_EYE_CATCHER;
2096         hdr->num_elems = 1;
2097         hdr->offset = sizeof(*hdr);
2098         hdr->status = IPR_DUMP_STATUS_SUCCESS;
2099 }
2100
2101 /**
2102  * ipr_dump_ioa_type_data - Fill in the adapter type in the dump.
2103  * @ioa_cfg:    ioa config struct
2104  * @driver_dump:        driver dump struct
2105  *
2106  * Return value:
2107  *      nothing
2108  **/
2109 static void ipr_dump_ioa_type_data(struct ipr_ioa_cfg *ioa_cfg,
2110                                    struct ipr_driver_dump *driver_dump)
2111 {
2112         struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
2113
2114         ipr_init_dump_entry_hdr(&driver_dump->ioa_type_entry.hdr);
2115         driver_dump->ioa_type_entry.hdr.len =
2116                 sizeof(struct ipr_dump_ioa_type_entry) -
2117                 sizeof(struct ipr_dump_entry_header);
2118         driver_dump->ioa_type_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
2119         driver_dump->ioa_type_entry.hdr.id = IPR_DUMP_DRIVER_TYPE_ID;
2120         driver_dump->ioa_type_entry.type = ioa_cfg->type;
2121         driver_dump->ioa_type_entry.fw_version = (ucode_vpd->major_release << 24) |
2122                 (ucode_vpd->card_type << 16) | (ucode_vpd->minor_release[0] << 8) |
2123                 ucode_vpd->minor_release[1];
2124         driver_dump->hdr.num_entries++;
2125 }
2126
2127 /**
2128  * ipr_dump_version_data - Fill in the driver version in the dump.
2129  * @ioa_cfg:    ioa config struct
2130  * @driver_dump:        driver dump struct
2131  *
2132  * Return value:
2133  *      nothing
2134  **/
2135 static void ipr_dump_version_data(struct ipr_ioa_cfg *ioa_cfg,
2136                                   struct ipr_driver_dump *driver_dump)
2137 {
2138         ipr_init_dump_entry_hdr(&driver_dump->version_entry.hdr);
2139         driver_dump->version_entry.hdr.len =
2140                 sizeof(struct ipr_dump_version_entry) -
2141                 sizeof(struct ipr_dump_entry_header);
2142         driver_dump->version_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_ASCII;
2143         driver_dump->version_entry.hdr.id = IPR_DUMP_DRIVER_VERSION_ID;
2144         strcpy(driver_dump->version_entry.version, IPR_DRIVER_VERSION);
2145         driver_dump->hdr.num_entries++;
2146 }
2147
2148 /**
2149  * ipr_dump_trace_data - Fill in the IOA trace in the dump.
2150  * @ioa_cfg:    ioa config struct
2151  * @driver_dump:        driver dump struct
2152  *
2153  * Return value:
2154  *      nothing
2155  **/
2156 static void ipr_dump_trace_data(struct ipr_ioa_cfg *ioa_cfg,
2157                                    struct ipr_driver_dump *driver_dump)
2158 {
2159         ipr_init_dump_entry_hdr(&driver_dump->trace_entry.hdr);
2160         driver_dump->trace_entry.hdr.len =
2161                 sizeof(struct ipr_dump_trace_entry) -
2162                 sizeof(struct ipr_dump_entry_header);
2163         driver_dump->trace_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
2164         driver_dump->trace_entry.hdr.id = IPR_DUMP_TRACE_ID;
2165         memcpy(driver_dump->trace_entry.trace, ioa_cfg->trace, IPR_TRACE_SIZE);
2166         driver_dump->hdr.num_entries++;
2167 }
2168
2169 /**
2170  * ipr_dump_location_data - Fill in the IOA location in the dump.
2171  * @ioa_cfg:    ioa config struct
2172  * @driver_dump:        driver dump struct
2173  *
2174  * Return value:
2175  *      nothing
2176  **/
2177 static void ipr_dump_location_data(struct ipr_ioa_cfg *ioa_cfg,
2178                                    struct ipr_driver_dump *driver_dump)
2179 {
2180         ipr_init_dump_entry_hdr(&driver_dump->location_entry.hdr);
2181         driver_dump->location_entry.hdr.len =
2182                 sizeof(struct ipr_dump_location_entry) -
2183                 sizeof(struct ipr_dump_entry_header);
2184         driver_dump->location_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_ASCII;
2185         driver_dump->location_entry.hdr.id = IPR_DUMP_LOCATION_ID;
2186         strcpy(driver_dump->location_entry.location, ioa_cfg->pdev->dev.bus_id);
2187         driver_dump->hdr.num_entries++;
2188 }
2189
2190 /**
2191  * ipr_get_ioa_dump - Perform a dump of the driver and adapter.
2192  * @ioa_cfg:    ioa config struct
2193  * @dump:               dump struct
2194  *
2195  * Return value:
2196  *      nothing
2197  **/
2198 static void ipr_get_ioa_dump(struct ipr_ioa_cfg *ioa_cfg, struct ipr_dump *dump)
2199 {
2200         unsigned long start_addr, sdt_word;
2201         unsigned long lock_flags = 0;
2202         struct ipr_driver_dump *driver_dump = &dump->driver_dump;
2203         struct ipr_ioa_dump *ioa_dump = &dump->ioa_dump;
2204         u32 num_entries, start_off, end_off;
2205         u32 bytes_to_copy, bytes_copied, rc;
2206         struct ipr_sdt *sdt;
2207         int i;
2208
2209         ENTER;
2210
2211         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2212
2213         if (ioa_cfg->sdt_state != GET_DUMP) {
2214                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2215                 return;
2216         }
2217
2218         start_addr = readl(ioa_cfg->ioa_mailbox);
2219
2220         if (!ipr_sdt_is_fmt2(start_addr)) {
2221                 dev_err(&ioa_cfg->pdev->dev,
2222                         "Invalid dump table format: %lx\n", start_addr);
2223                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2224                 return;
2225         }
2226
2227         dev_err(&ioa_cfg->pdev->dev, "Dump of IOA initiated\n");
2228
2229         driver_dump->hdr.eye_catcher = IPR_DUMP_EYE_CATCHER;
2230
2231         /* Initialize the overall dump header */
2232         driver_dump->hdr.len = sizeof(struct ipr_driver_dump);
2233         driver_dump->hdr.num_entries = 1;
2234         driver_dump->hdr.first_entry_offset = sizeof(struct ipr_dump_header);
2235         driver_dump->hdr.status = IPR_DUMP_STATUS_SUCCESS;
2236         driver_dump->hdr.os = IPR_DUMP_OS_LINUX;
2237         driver_dump->hdr.driver_name = IPR_DUMP_DRIVER_NAME;
2238
2239         ipr_dump_version_data(ioa_cfg, driver_dump);
2240         ipr_dump_location_data(ioa_cfg, driver_dump);
2241         ipr_dump_ioa_type_data(ioa_cfg, driver_dump);
2242         ipr_dump_trace_data(ioa_cfg, driver_dump);
2243
2244         /* Update dump_header */
2245         driver_dump->hdr.len += sizeof(struct ipr_dump_entry_header);
2246
2247         /* IOA Dump entry */
2248         ipr_init_dump_entry_hdr(&ioa_dump->hdr);
2249         ioa_dump->format = IPR_SDT_FMT2;
2250         ioa_dump->hdr.len = 0;
2251         ioa_dump->hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
2252         ioa_dump->hdr.id = IPR_DUMP_IOA_DUMP_ID;
2253
2254         /* First entries in sdt are actually a list of dump addresses and
2255          lengths to gather the real dump data.  sdt represents the pointer
2256          to the ioa generated dump table.  Dump data will be extracted based
2257          on entries in this table */
2258         sdt = &ioa_dump->sdt;
2259
2260         rc = ipr_get_ldump_data_section(ioa_cfg, start_addr, (__be32 *)sdt,
2261                                         sizeof(struct ipr_sdt) / sizeof(__be32));
2262
2263         /* Smart Dump table is ready to use and the first entry is valid */
2264         if (rc || (be32_to_cpu(sdt->hdr.state) != IPR_FMT2_SDT_READY_TO_USE)) {
2265                 dev_err(&ioa_cfg->pdev->dev,
2266                         "Dump of IOA failed. Dump table not valid: %d, %X.\n",
2267                         rc, be32_to_cpu(sdt->hdr.state));
2268                 driver_dump->hdr.status = IPR_DUMP_STATUS_FAILED;
2269                 ioa_cfg->sdt_state = DUMP_OBTAINED;
2270                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2271                 return;
2272         }
2273
2274         num_entries = be32_to_cpu(sdt->hdr.num_entries_used);
2275
2276         if (num_entries > IPR_NUM_SDT_ENTRIES)
2277                 num_entries = IPR_NUM_SDT_ENTRIES;
2278
2279         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2280
2281         for (i = 0; i < num_entries; i++) {
2282                 if (ioa_dump->hdr.len > IPR_MAX_IOA_DUMP_SIZE) {
2283                         driver_dump->hdr.status = IPR_DUMP_STATUS_QUAL_SUCCESS;
2284                         break;
2285                 }
2286
2287                 if (sdt->entry[i].flags & IPR_SDT_VALID_ENTRY) {
2288                         sdt_word = be32_to_cpu(sdt->entry[i].bar_str_offset);
2289                         start_off = sdt_word & IPR_FMT2_MBX_ADDR_MASK;
2290                         end_off = be32_to_cpu(sdt->entry[i].end_offset);
2291
2292                         if (ipr_sdt_is_fmt2(sdt_word) && sdt_word) {
2293                                 bytes_to_copy = end_off - start_off;
2294                                 if (bytes_to_copy > IPR_MAX_IOA_DUMP_SIZE) {
2295                                         sdt->entry[i].flags &= ~IPR_SDT_VALID_ENTRY;
2296                                         continue;
2297                                 }
2298
2299                                 /* Copy data from adapter to driver buffers */
2300                                 bytes_copied = ipr_sdt_copy(ioa_cfg, sdt_word,
2301                                                             bytes_to_copy);
2302
2303                                 ioa_dump->hdr.len += bytes_copied;
2304
2305                                 if (bytes_copied != bytes_to_copy) {
2306                                         driver_dump->hdr.status = IPR_DUMP_STATUS_QUAL_SUCCESS;
2307                                         break;
2308                                 }
2309                         }
2310                 }
2311         }
2312
2313         dev_err(&ioa_cfg->pdev->dev, "Dump of IOA completed.\n");
2314
2315         /* Update dump_header */
2316         driver_dump->hdr.len += ioa_dump->hdr.len;
2317         wmb();
2318         ioa_cfg->sdt_state = DUMP_OBTAINED;
2319         LEAVE;
2320 }
2321
2322 #else
2323 #define ipr_get_ioa_dump(ioa_cfg, dump) do { } while(0)
2324 #endif
2325
2326 /**
2327  * ipr_release_dump - Free adapter dump memory
2328  * @kref:       kref struct
2329  *
2330  * Return value:
2331  *      nothing
2332  **/
2333 static void ipr_release_dump(struct kref *kref)
2334 {
2335         struct ipr_dump *dump = container_of(kref,struct ipr_dump,kref);
2336         struct ipr_ioa_cfg *ioa_cfg = dump->ioa_cfg;
2337         unsigned long lock_flags = 0;
2338         int i;
2339
2340         ENTER;
2341         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2342         ioa_cfg->dump = NULL;
2343         ioa_cfg->sdt_state = INACTIVE;
2344         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2345
2346         for (i = 0; i < dump->ioa_dump.next_page_index; i++)
2347                 free_page((unsigned long) dump->ioa_dump.ioa_data[i]);
2348
2349         kfree(dump);
2350         LEAVE;
2351 }
2352
2353 /**
2354  * ipr_worker_thread - Worker thread
2355  * @work:               ioa config struct
2356  *
2357  * Called at task level from a work thread. This function takes care
2358  * of adding and removing device from the mid-layer as configuration
2359  * changes are detected by the adapter.
2360  *
2361  * Return value:
2362  *      nothing
2363  **/
2364 static void ipr_worker_thread(struct work_struct *work)
2365 {
2366         unsigned long lock_flags;
2367         struct ipr_resource_entry *res;
2368         struct scsi_device *sdev;
2369         struct ipr_dump *dump;
2370         struct ipr_ioa_cfg *ioa_cfg =
2371                 container_of(work, struct ipr_ioa_cfg, work_q);
2372         u8 bus, target, lun;
2373         int did_work;
2374
2375         ENTER;
2376         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2377
2378         if (ioa_cfg->sdt_state == GET_DUMP) {
2379                 dump = ioa_cfg->dump;
2380                 if (!dump) {
2381                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2382                         return;
2383                 }
2384                 kref_get(&dump->kref);
2385                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2386                 ipr_get_ioa_dump(ioa_cfg, dump);
2387                 kref_put(&dump->kref, ipr_release_dump);
2388
2389                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2390                 if (ioa_cfg->sdt_state == DUMP_OBTAINED)
2391                         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
2392                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2393                 return;
2394         }
2395
2396 restart:
2397         do {
2398                 did_work = 0;
2399                 if (!ioa_cfg->allow_cmds || !ioa_cfg->allow_ml_add_del) {
2400                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2401                         return;
2402                 }
2403
2404                 list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
2405                         if (res->del_from_ml && res->sdev) {
2406                                 did_work = 1;
2407                                 sdev = res->sdev;
2408                                 if (!scsi_device_get(sdev)) {
2409                                         list_move_tail(&res->queue, &ioa_cfg->free_res_q);
2410                                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2411                                         scsi_remove_device(sdev);
2412                                         scsi_device_put(sdev);
2413                                         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2414                                 }
2415                                 break;
2416                         }
2417                 }
2418         } while(did_work);
2419
2420         list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
2421                 if (res->add_to_ml) {
2422                         bus = res->cfgte.res_addr.bus;
2423                         target = res->cfgte.res_addr.target;
2424                         lun = res->cfgte.res_addr.lun;
2425                         res->add_to_ml = 0;
2426                         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2427                         scsi_add_device(ioa_cfg->host, bus, target, lun);
2428                         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2429                         goto restart;
2430                 }
2431         }
2432
2433         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2434         kobject_uevent(&ioa_cfg->host->shost_classdev.kobj, KOBJ_CHANGE);
2435         LEAVE;
2436 }
2437
2438 #ifdef CONFIG_SCSI_IPR_TRACE
2439 /**
2440  * ipr_read_trace - Dump the adapter trace
2441  * @kobj:               kobject struct
2442  * @bin_attr:           bin_attribute struct
2443  * @buf:                buffer
2444  * @off:                offset
2445  * @count:              buffer size
2446  *
2447  * Return value:
2448  *      number of bytes printed to buffer
2449  **/
2450 static ssize_t ipr_read_trace(struct kobject *kobj,
2451                               struct bin_attribute *bin_attr,
2452                               char *buf, loff_t off, size_t count)
2453 {
2454         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
2455         struct Scsi_Host *shost = class_to_shost(cdev);
2456         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2457         unsigned long lock_flags = 0;
2458         int size = IPR_TRACE_SIZE;
2459         char *src = (char *)ioa_cfg->trace;
2460
2461         if (off > size)
2462                 return 0;
2463         if (off + count > size) {
2464                 size -= off;
2465                 count = size;
2466         }
2467
2468         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2469         memcpy(buf, &src[off], count);
2470         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2471         return count;
2472 }
2473
2474 static struct bin_attribute ipr_trace_attr = {
2475         .attr = {
2476                 .name = "trace",
2477                 .mode = S_IRUGO,
2478         },
2479         .size = 0,
2480         .read = ipr_read_trace,
2481 };
2482 #endif
2483
2484 static const struct {
2485         enum ipr_cache_state state;
2486         char *name;
2487 } cache_state [] = {
2488         { CACHE_NONE, "none" },
2489         { CACHE_DISABLED, "disabled" },
2490         { CACHE_ENABLED, "enabled" }
2491 };
2492
2493 /**
2494  * ipr_show_write_caching - Show the write caching attribute
2495  * @class_dev:  class device struct
2496  * @buf:                buffer
2497  *
2498  * Return value:
2499  *      number of bytes printed to buffer
2500  **/
2501 static ssize_t ipr_show_write_caching(struct class_device *class_dev, char *buf)
2502 {
2503         struct Scsi_Host *shost = class_to_shost(class_dev);
2504         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2505         unsigned long lock_flags = 0;
2506         int i, len = 0;
2507
2508         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2509         for (i = 0; i < ARRAY_SIZE(cache_state); i++) {
2510                 if (cache_state[i].state == ioa_cfg->cache_state) {
2511                         len = snprintf(buf, PAGE_SIZE, "%s\n", cache_state[i].name);
2512                         break;
2513                 }
2514         }
2515         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2516         return len;
2517 }
2518
2519
2520 /**
2521  * ipr_store_write_caching - Enable/disable adapter write cache
2522  * @class_dev:  class_device struct
2523  * @buf:                buffer
2524  * @count:              buffer size
2525  *
2526  * This function will enable/disable adapter write cache.
2527  *
2528  * Return value:
2529  *      count on success / other on failure
2530  **/
2531 static ssize_t ipr_store_write_caching(struct class_device *class_dev,
2532                                         const char *buf, size_t count)
2533 {
2534         struct Scsi_Host *shost = class_to_shost(class_dev);
2535         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2536         unsigned long lock_flags = 0;
2537         enum ipr_cache_state new_state = CACHE_INVALID;
2538         int i;
2539
2540         if (!capable(CAP_SYS_ADMIN))
2541                 return -EACCES;
2542         if (ioa_cfg->cache_state == CACHE_NONE)
2543                 return -EINVAL;
2544
2545         for (i = 0; i < ARRAY_SIZE(cache_state); i++) {
2546                 if (!strncmp(cache_state[i].name, buf, strlen(cache_state[i].name))) {
2547                         new_state = cache_state[i].state;
2548                         break;
2549                 }
2550         }
2551
2552         if (new_state != CACHE_DISABLED && new_state != CACHE_ENABLED)
2553                 return -EINVAL;
2554
2555         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2556         if (ioa_cfg->cache_state == new_state) {
2557                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2558                 return count;
2559         }
2560
2561         ioa_cfg->cache_state = new_state;
2562         dev_info(&ioa_cfg->pdev->dev, "%s adapter write cache.\n",
2563                  new_state == CACHE_ENABLED ? "Enabling" : "Disabling");
2564         if (!ioa_cfg->in_reset_reload)
2565                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
2566         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2567         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
2568
2569         return count;
2570 }
2571
2572 static struct class_device_attribute ipr_ioa_cache_attr = {
2573         .attr = {
2574                 .name =         "write_cache",
2575                 .mode =         S_IRUGO | S_IWUSR,
2576         },
2577         .show = ipr_show_write_caching,
2578         .store = ipr_store_write_caching
2579 };
2580
2581 /**
2582  * ipr_show_fw_version - Show the firmware version
2583  * @class_dev:  class device struct
2584  * @buf:                buffer
2585  *
2586  * Return value:
2587  *      number of bytes printed to buffer
2588  **/
2589 static ssize_t ipr_show_fw_version(struct class_device *class_dev, char *buf)
2590 {
2591         struct Scsi_Host *shost = class_to_shost(class_dev);
2592         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2593         struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
2594         unsigned long lock_flags = 0;
2595         int len;
2596
2597         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2598         len = snprintf(buf, PAGE_SIZE, "%02X%02X%02X%02X\n",
2599                        ucode_vpd->major_release, ucode_vpd->card_type,
2600                        ucode_vpd->minor_release[0],
2601                        ucode_vpd->minor_release[1]);
2602         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2603         return len;
2604 }
2605
2606 static struct class_device_attribute ipr_fw_version_attr = {
2607         .attr = {
2608                 .name =         "fw_version",
2609                 .mode =         S_IRUGO,
2610         },
2611         .show = ipr_show_fw_version,
2612 };
2613
2614 /**
2615  * ipr_show_log_level - Show the adapter's error logging level
2616  * @class_dev:  class device struct
2617  * @buf:                buffer
2618  *
2619  * Return value:
2620  *      number of bytes printed to buffer
2621  **/
2622 static ssize_t ipr_show_log_level(struct class_device *class_dev, char *buf)
2623 {
2624         struct Scsi_Host *shost = class_to_shost(class_dev);
2625         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2626         unsigned long lock_flags = 0;
2627         int len;
2628
2629         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2630         len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->log_level);
2631         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2632         return len;
2633 }
2634
2635 /**
2636  * ipr_store_log_level - Change the adapter's error logging level
2637  * @class_dev:  class device struct
2638  * @buf:                buffer
2639  *
2640  * Return value:
2641  *      number of bytes printed to buffer
2642  **/
2643 static ssize_t ipr_store_log_level(struct class_device *class_dev,
2644                                    const char *buf, size_t count)
2645 {
2646         struct Scsi_Host *shost = class_to_shost(class_dev);
2647         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2648         unsigned long lock_flags = 0;
2649
2650         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2651         ioa_cfg->log_level = simple_strtoul(buf, NULL, 10);
2652         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2653         return strlen(buf);
2654 }
2655
2656 static struct class_device_attribute ipr_log_level_attr = {
2657         .attr = {
2658                 .name =         "log_level",
2659                 .mode =         S_IRUGO | S_IWUSR,
2660         },
2661         .show = ipr_show_log_level,
2662         .store = ipr_store_log_level
2663 };
2664
2665 /**
2666  * ipr_store_diagnostics - IOA Diagnostics interface
2667  * @class_dev:  class_device struct
2668  * @buf:                buffer
2669  * @count:              buffer size
2670  *
2671  * This function will reset the adapter and wait a reasonable
2672  * amount of time for any errors that the adapter might log.
2673  *
2674  * Return value:
2675  *      count on success / other on failure
2676  **/
2677 static ssize_t ipr_store_diagnostics(struct class_device *class_dev,
2678                                      const char *buf, size_t count)
2679 {
2680         struct Scsi_Host *shost = class_to_shost(class_dev);
2681         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2682         unsigned long lock_flags = 0;
2683         int rc = count;
2684
2685         if (!capable(CAP_SYS_ADMIN))
2686                 return -EACCES;
2687
2688         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2689         while(ioa_cfg->in_reset_reload) {
2690                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2691                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
2692                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2693         }
2694
2695         ioa_cfg->errors_logged = 0;
2696         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
2697
2698         if (ioa_cfg->in_reset_reload) {
2699                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2700                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
2701
2702                 /* Wait for a second for any errors to be logged */
2703                 msleep(1000);
2704         } else {
2705                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2706                 return -EIO;
2707         }
2708
2709         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2710         if (ioa_cfg->in_reset_reload || ioa_cfg->errors_logged)
2711                 rc = -EIO;
2712         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2713
2714         return rc;
2715 }
2716
2717 static struct class_device_attribute ipr_diagnostics_attr = {
2718         .attr = {
2719                 .name =         "run_diagnostics",
2720                 .mode =         S_IWUSR,
2721         },
2722         .store = ipr_store_diagnostics
2723 };
2724
2725 /**
2726  * ipr_show_adapter_state - Show the adapter's state
2727  * @class_dev:  class device struct
2728  * @buf:                buffer
2729  *
2730  * Return value:
2731  *      number of bytes printed to buffer
2732  **/
2733 static ssize_t ipr_show_adapter_state(struct class_device *class_dev, char *buf)
2734 {
2735         struct Scsi_Host *shost = class_to_shost(class_dev);
2736         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2737         unsigned long lock_flags = 0;
2738         int len;
2739
2740         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2741         if (ioa_cfg->ioa_is_dead)
2742                 len = snprintf(buf, PAGE_SIZE, "offline\n");
2743         else
2744                 len = snprintf(buf, PAGE_SIZE, "online\n");
2745         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2746         return len;
2747 }
2748
2749 /**
2750  * ipr_store_adapter_state - Change adapter state
2751  * @class_dev:  class_device struct
2752  * @buf:                buffer
2753  * @count:              buffer size
2754  *
2755  * This function will change the adapter's state.
2756  *
2757  * Return value:
2758  *      count on success / other on failure
2759  **/
2760 static ssize_t ipr_store_adapter_state(struct class_device *class_dev,
2761                                        const char *buf, size_t count)
2762 {
2763         struct Scsi_Host *shost = class_to_shost(class_dev);
2764         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2765         unsigned long lock_flags;
2766         int result = count;
2767
2768         if (!capable(CAP_SYS_ADMIN))
2769                 return -EACCES;
2770
2771         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2772         if (ioa_cfg->ioa_is_dead && !strncmp(buf, "online", 6)) {
2773                 ioa_cfg->ioa_is_dead = 0;
2774                 ioa_cfg->reset_retries = 0;
2775                 ioa_cfg->in_ioa_bringdown = 0;
2776                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
2777         }
2778         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2779         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
2780
2781         return result;
2782 }
2783
2784 static struct class_device_attribute ipr_ioa_state_attr = {
2785         .attr = {
2786                 .name =         "state",
2787                 .mode =         S_IRUGO | S_IWUSR,
2788         },
2789         .show = ipr_show_adapter_state,
2790         .store = ipr_store_adapter_state
2791 };
2792
2793 /**
2794  * ipr_store_reset_adapter - Reset the adapter
2795  * @class_dev:  class_device struct
2796  * @buf:                buffer
2797  * @count:              buffer size
2798  *
2799  * This function will reset the adapter.
2800  *
2801  * Return value:
2802  *      count on success / other on failure
2803  **/
2804 static ssize_t ipr_store_reset_adapter(struct class_device *class_dev,
2805                                        const char *buf, size_t count)
2806 {
2807         struct Scsi_Host *shost = class_to_shost(class_dev);
2808         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2809         unsigned long lock_flags;
2810         int result = count;
2811
2812         if (!capable(CAP_SYS_ADMIN))
2813                 return -EACCES;
2814
2815         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2816         if (!ioa_cfg->in_reset_reload)
2817                 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
2818         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2819         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
2820
2821         return result;
2822 }
2823
2824 static struct class_device_attribute ipr_ioa_reset_attr = {
2825         .attr = {
2826                 .name =         "reset_host",
2827                 .mode =         S_IWUSR,
2828         },
2829         .store = ipr_store_reset_adapter
2830 };
2831
2832 /**
2833  * ipr_alloc_ucode_buffer - Allocates a microcode download buffer
2834  * @buf_len:            buffer length
2835  *
2836  * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
2837  * list to use for microcode download
2838  *
2839  * Return value:
2840  *      pointer to sglist / NULL on failure
2841  **/
2842 static struct ipr_sglist *ipr_alloc_ucode_buffer(int buf_len)
2843 {
2844         int sg_size, order, bsize_elem, num_elem, i, j;
2845         struct ipr_sglist *sglist;
2846         struct scatterlist *scatterlist;
2847         struct page *page;
2848
2849         /* Get the minimum size per scatter/gather element */
2850         sg_size = buf_len / (IPR_MAX_SGLIST - 1);
2851
2852         /* Get the actual size per element */
2853         order = get_order(sg_size);
2854
2855         /* Determine the actual number of bytes per element */
2856         bsize_elem = PAGE_SIZE * (1 << order);
2857
2858         /* Determine the actual number of sg entries needed */
2859         if (buf_len % bsize_elem)
2860                 num_elem = (buf_len / bsize_elem) + 1;
2861         else
2862                 num_elem = buf_len / bsize_elem;
2863
2864         /* Allocate a scatter/gather list for the DMA */
2865         sglist = kzalloc(sizeof(struct ipr_sglist) +
2866                          (sizeof(struct scatterlist) * (num_elem - 1)),
2867                          GFP_KERNEL);
2868
2869         if (sglist == NULL) {
2870                 ipr_trace;
2871                 return NULL;
2872         }
2873
2874         scatterlist = sglist->scatterlist;
2875
2876         sglist->order = order;
2877         sglist->num_sg = num_elem;
2878
2879         /* Allocate a bunch of sg elements */
2880         for (i = 0; i < num_elem; i++) {
2881                 page = alloc_pages(GFP_KERNEL, order);
2882                 if (!page) {
2883                         ipr_trace;
2884
2885                         /* Free up what we already allocated */
2886                         for (j = i - 1; j >= 0; j--)
2887                                 __free_pages(scatterlist[j].page, order);
2888                         kfree(sglist);
2889                         return NULL;
2890                 }
2891
2892                 scatterlist[i].page = page;
2893         }
2894
2895         return sglist;
2896 }
2897
2898 /**
2899  * ipr_free_ucode_buffer - Frees a microcode download buffer
2900  * @p_dnld:             scatter/gather list pointer
2901  *
2902  * Free a DMA'able ucode download buffer previously allocated with
2903  * ipr_alloc_ucode_buffer
2904  *
2905  * Return value:
2906  *      nothing
2907  **/
2908 static void ipr_free_ucode_buffer(struct ipr_sglist *sglist)
2909 {
2910         int i;
2911
2912         for (i = 0; i < sglist->num_sg; i++)
2913                 __free_pages(sglist->scatterlist[i].page, sglist->order);
2914
2915         kfree(sglist);
2916 }
2917
2918 /**
2919  * ipr_copy_ucode_buffer - Copy user buffer to kernel buffer
2920  * @sglist:             scatter/gather list pointer
2921  * @buffer:             buffer pointer
2922  * @len:                buffer length
2923  *
2924  * Copy a microcode image from a user buffer into a buffer allocated by
2925  * ipr_alloc_ucode_buffer
2926  *
2927  * Return value:
2928  *      0 on success / other on failure
2929  **/
2930 static int ipr_copy_ucode_buffer(struct ipr_sglist *sglist,
2931                                  u8 *buffer, u32 len)
2932 {
2933         int bsize_elem, i, result = 0;
2934         struct scatterlist *scatterlist;
2935         void *kaddr;
2936
2937         /* Determine the actual number of bytes per element */
2938         bsize_elem = PAGE_SIZE * (1 << sglist->order);
2939
2940         scatterlist = sglist->scatterlist;
2941
2942         for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
2943                 kaddr = kmap(scatterlist[i].page);
2944                 memcpy(kaddr, buffer, bsize_elem);
2945                 kunmap(scatterlist[i].page);
2946
2947                 scatterlist[i].length = bsize_elem;
2948
2949                 if (result != 0) {
2950                         ipr_trace;
2951                         return result;
2952                 }
2953         }
2954
2955         if (len % bsize_elem) {
2956                 kaddr = kmap(scatterlist[i].page);
2957                 memcpy(kaddr, buffer, len % bsize_elem);
2958                 kunmap(scatterlist[i].page);
2959
2960                 scatterlist[i].length = len % bsize_elem;
2961         }
2962
2963         sglist->buffer_len = len;
2964         return result;
2965 }
2966
2967 /**
2968  * ipr_build_ucode_ioadl - Build a microcode download IOADL
2969  * @ipr_cmd:    ipr command struct
2970  * @sglist:             scatter/gather list
2971  *
2972  * Builds a microcode download IOA data list (IOADL).
2973  *
2974  **/
2975 static void ipr_build_ucode_ioadl(struct ipr_cmnd *ipr_cmd,
2976                                   struct ipr_sglist *sglist)
2977 {
2978         struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
2979         struct ipr_ioadl_desc *ioadl = ipr_cmd->ioadl;
2980         struct scatterlist *scatterlist = sglist->scatterlist;
2981         int i;
2982
2983         ipr_cmd->dma_use_sg = sglist->num_dma_sg;
2984         ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
2985         ioarcb->write_data_transfer_length = cpu_to_be32(sglist->buffer_len);
2986         ioarcb->write_ioadl_len =
2987                 cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
2988
2989         for (i = 0; i < ipr_cmd->dma_use_sg; i++) {
2990                 ioadl[i].flags_and_data_len =
2991                         cpu_to_be32(IPR_IOADL_FLAGS_WRITE | sg_dma_len(&scatterlist[i]));
2992                 ioadl[i].address =
2993                         cpu_to_be32(sg_dma_address(&scatterlist[i]));
2994         }
2995
2996         ioadl[i-1].flags_and_data_len |=
2997                 cpu_to_be32(IPR_IOADL_FLAGS_LAST);
2998 }
2999
3000 /**
3001  * ipr_update_ioa_ucode - Update IOA's microcode
3002  * @ioa_cfg:    ioa config struct
3003  * @sglist:             scatter/gather list
3004  *
3005  * Initiate an adapter reset to update the IOA's microcode
3006  *
3007  * Return value:
3008  *      0 on success / -EIO on failure
3009  **/
3010 static int ipr_update_ioa_ucode(struct ipr_ioa_cfg *ioa_cfg,
3011                                 struct ipr_sglist *sglist)
3012 {
3013         unsigned long lock_flags;
3014
3015         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3016         while(ioa_cfg->in_reset_reload) {
3017                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3018                 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3019                 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3020         }
3021
3022         if (ioa_cfg->ucode_sglist) {
3023                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3024                 dev_err(&ioa_cfg->pdev->dev,
3025                         "Microcode download already in progress\n");
3026                 return -EIO;
3027         }
3028
3029         sglist->num_dma_sg = pci_map_sg(ioa_cfg->pdev, sglist->scatterlist,
3030                                         sglist->num_sg, DMA_TO_DEVICE);
3031
3032         if (!sglist->num_dma_sg) {
3033                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3034                 dev_err(&ioa_cfg->pdev->dev,
3035                         "Failed to map microcode download buffer!\n");
3036                 return -EIO;
3037         }
3038
3039         ioa_cfg->ucode_sglist = sglist;
3040         ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3041         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3042         wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3043
3044         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3045         ioa_cfg->ucode_sglist = NULL;
3046         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3047         return 0;
3048 }
3049
3050 /**
3051  * ipr_store_update_fw - Update the firmware on the adapter
3052  * @class_dev:  class_device struct
3053  * @buf:                buffer
3054  * @count:              buffer size
3055  *
3056  * This function will update the firmware on the adapter.
3057  *
3058  * Return value:
3059  *      count on success / other on failure
3060  **/
3061 static ssize_t ipr_store_update_fw(struct class_device *class_dev,
3062                                        const char *buf, size_t count)
3063 {
3064         struct Scsi_Host *shost = class_to_shost(class_dev);
3065         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3066         struct ipr_ucode_image_header *image_hdr;
3067         const struct firmware *fw_entry;
3068         struct ipr_sglist *sglist;
3069         char fname[100];
3070         char *src;
3071         int len, result, dnld_size;
3072
3073         if (!capable(CAP_SYS_ADMIN))
3074                 return -EACCES;
3075
3076         len = snprintf(fname, 99, "%s", buf);
3077         fname[len-1] = '\0';
3078
3079         if(request_firmware(&fw_entry, fname, &ioa_cfg->pdev->dev)) {
3080                 dev_err(&ioa_cfg->pdev->dev, "Firmware file %s not found\n", fname);
3081                 return -EIO;
3082         }
3083
3084         image_hdr = (struct ipr_ucode_image_header *)fw_entry->data;
3085
3086         if (be32_to_cpu(image_hdr->header_length) > fw_entry->size ||
3087             (ioa_cfg->vpd_cbs->page3_data.card_type &&
3088              ioa_cfg->vpd_cbs->page3_data.card_type != image_hdr->card_type)) {
3089                 dev_err(&ioa_cfg->pdev->dev, "Invalid microcode buffer\n");
3090                 release_firmware(fw_entry);
3091                 return -EINVAL;
3092         }
3093
3094         src = (u8 *)image_hdr + be32_to_cpu(image_hdr->header_length);
3095         dnld_size = fw_entry->size - be32_to_cpu(image_hdr->header_length);
3096         sglist = ipr_alloc_ucode_buffer(dnld_size);
3097
3098         if (!sglist) {
3099                 dev_err(&ioa_cfg->pdev->dev, "Microcode buffer allocation failed\n");
3100                 release_firmware(fw_entry);
3101                 return -ENOMEM;
3102         }
3103
3104         result = ipr_copy_ucode_buffer(sglist, src, dnld_size);
3105
3106         if (result) {
3107                 dev_err(&ioa_cfg->pdev->dev,
3108                         "Microcode buffer copy to DMA buffer failed\n");
3109                 goto out;
3110         }
3111
3112         result = ipr_update_ioa_ucode(ioa_cfg, sglist);
3113
3114         if (!result)
3115                 result = count;
3116 out:
3117         ipr_free_ucode_buffer(sglist);
3118         release_firmware(fw_entry);
3119         return result;
3120 }
3121
3122 static struct class_device_attribute ipr_update_fw_attr = {
3123         .attr = {
3124                 .name =         "update_fw",
3125                 .mode =         S_IWUSR,
3126         },
3127         .store = ipr_store_update_fw
3128 };
3129
3130 static struct class_device_attribute *ipr_ioa_attrs[] = {
3131         &ipr_fw_version_attr,
3132         &ipr_log_level_attr,
3133         &ipr_diagnostics_attr,
3134         &ipr_ioa_state_attr,
3135         &ipr_ioa_reset_attr,
3136         &ipr_update_fw_attr,
3137         &ipr_ioa_cache_attr,
3138         NULL,
3139 };
3140
3141 #ifdef CONFIG_SCSI_IPR_DUMP
3142 /**
3143  * ipr_read_dump - Dump the adapter
3144  * @kobj:               kobject struct
3145  * @bin_attr:           bin_attribute struct
3146  * @buf:                buffer
3147  * @off:                offset
3148  * @count:              buffer size
3149  *
3150  * Return value:
3151  *      number of bytes printed to buffer
3152  **/
3153 static ssize_t ipr_read_dump(struct kobject *kobj,
3154                              struct bin_attribute *bin_attr,
3155                              char *buf, loff_t off, size_t count)
3156 {
3157         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
3158         struct Scsi_Host *shost = class_to_shost(cdev);
3159         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3160         struct ipr_dump *dump;
3161         unsigned long lock_flags = 0;
3162         char *src;
3163         int len;
3164         size_t rc = count;
3165
3166         if (!capable(CAP_SYS_ADMIN))
3167                 return -EACCES;
3168
3169         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3170         dump = ioa_cfg->dump;
3171
3172         if (ioa_cfg->sdt_state != DUMP_OBTAINED || !dump) {
3173                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3174                 return 0;
3175         }
3176         kref_get(&dump->kref);
3177         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3178
3179         if (off > dump->driver_dump.hdr.len) {
3180                 kref_put(&dump->kref, ipr_release_dump);
3181                 return 0;
3182         }
3183
3184         if (off + count > dump->driver_dump.hdr.len) {
3185                 count = dump->driver_dump.hdr.len - off;
3186                 rc = count;
3187         }
3188
3189         if (count && off < sizeof(dump->driver_dump)) {
3190                 if (off + count > sizeof(dump->driver_dump))
3191                         len = sizeof(dump->driver_dump) - off;
3192                 else
3193                         len = count;
3194                 src = (u8 *)&dump->driver_dump + off;
3195                 memcpy(buf, src, len);
3196                 buf += len;
3197                 off += len;
3198                 count -= len;
3199         }
3200
3201         off -= sizeof(dump->driver_dump);
3202
3203         if (count && off < offsetof(struct ipr_ioa_dump, ioa_data)) {
3204                 if (off + count > offsetof(struct ipr_ioa_dump, ioa_data))
3205                         len = offsetof(struct ipr_ioa_dump, ioa_data) - off;
3206                 else
3207                         len = count;
3208                 src = (u8 *)&dump->ioa_dump + off;
3209                 memcpy(buf, src, len);
3210                 buf += len;
3211                 off += len;
3212                 count -= len;
3213         }
3214
3215         off -= offsetof(struct ipr_ioa_dump, ioa_data);
3216
3217         while (count) {
3218                 if ((off & PAGE_MASK) != ((off + count) & PAGE_MASK))
3219                         len = PAGE_ALIGN(off) - off;
3220                 else
3221                         len = count;
3222                 src = (u8 *)dump->ioa_dump.ioa_data[(off & PAGE_MASK) >> PAGE_SHIFT];
3223                 src += off & ~PAGE_MASK;
3224                 memcpy(buf, src, len);
3225                 buf += len;
3226                 off += len;
3227                 count -= len;
3228         }
3229
3230         kref_put(&dump->kref, ipr_release_dump);
3231         return rc;
3232 }
3233
3234 /**
3235  * ipr_alloc_dump - Prepare for adapter dump
3236  * @ioa_cfg:    ioa config struct
3237  *
3238  * Return value:
3239  *      0 on success / other on failure
3240  **/
3241 static int ipr_alloc_dump(struct ipr_ioa_cfg *ioa_cfg)
3242 {
3243         struct ipr_dump *dump;
3244         unsigned long lock_flags = 0;
3245
3246         dump = kzalloc(sizeof(struct ipr_dump), GFP_KERNEL);
3247
3248         if (!dump) {
3249                 ipr_err("Dump memory allocation failed\n");
3250                 return -ENOMEM;
3251         }
3252
3253         kref_init(&dump->kref);
3254         dump->ioa_cfg = ioa_cfg;
3255
3256         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3257
3258         if (INACTIVE != ioa_cfg->sdt_state) {
3259                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3260                 kfree(dump);
3261                 return 0;
3262         }
3263
3264         ioa_cfg->dump = dump;
3265         ioa_cfg->sdt_state = WAIT_FOR_DUMP;
3266         if (ioa_cfg->ioa_is_dead && !ioa_cfg->dump_taken) {
3267                 ioa_cfg->dump_taken = 1;
3268                 schedule_work(&ioa_cfg->work_q);
3269         }
3270         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3271
3272         return 0;
3273 }
3274
3275 /**
3276  * ipr_free_dump - Free adapter dump memory
3277  * @ioa_cfg:    ioa config struct
3278  *
3279  * Return value:
3280  *      0 on success / other on failure
3281  **/
3282 static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg)
3283 {
3284         struct ipr_dump *dump;
3285         unsigned long lock_flags = 0;
3286
3287         ENTER;
3288
3289         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3290         dump = ioa_cfg->dump;
3291         if (!dump) {
3292                 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3293                 return 0;
3294         }
3295
3296         ioa_cfg->dump = NULL;
3297         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3298
3299         kref_put(&dump->kref, ipr_release_dump);
3300
3301         LEAVE;
3302         return 0;
3303 }
3304
3305 /**
3306  * ipr_write_dump - Setup dump state of adapter
3307  * @kobj:               kobject struct
3308  * @bin_attr:           bin_attribute struct
3309  * @buf:                buffer
3310  * @off:                offset
3311  * @count:              buffer size
3312  *
3313  * Return value:
3314  *      number of bytes printed to buffer
3315  **/
3316 static ssize_t ipr_write_dump(struct kobject *kobj,
3317                               struct bin_attribute *bin_attr,
3318                               char *buf, loff_t off, size_t count)
3319 {
3320         struct class_device *cdev = container_of(kobj,struct class_device,kobj);
3321         struct Scsi_Host *shost = class_to_shost(cdev);
3322         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3323         int rc;
3324
3325         if (!capable(CAP_SYS_ADMIN))
3326                 return -EACCES;
3327
3328         if (buf[0] == '1')
3329                 rc = ipr_alloc_dump(ioa_cfg);
3330         else if (buf[0] == '0')
3331                 rc = ipr_free_dump(ioa_cfg);
3332         else
3333                 return -EINVAL;
3334
3335         if (rc)
3336                 return rc;
3337         else
3338                 return count;
3339 }
3340
3341 static struct bin_attribute ipr_dump_attr = {
3342         .attr = {
3343                 .name = "dump",
3344                 .mode = S_IRUSR | S_IWUSR,
3345         },
3346         .size = 0,
3347         .read = ipr_read_dump,
3348         .write = ipr_write_dump
3349 };
3350 #else
3351 static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg) { return 0; };
3352 #endif
3353
3354 /**
3355  * ipr_change_queue_depth - Change the device's queue depth
3356  * @sdev:       scsi device struct
3357  * @qdepth:     depth to set
3358  *
3359  * Return value:
3360  *      actual depth set
3361  **/
3362 static int ipr_change_queue_depth(struct scsi_device *sdev, int qdepth)
3363 {
3364         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
3365         struct ipr_resource_entry *res;
3366         unsigned long lock_flags = 0;
3367
3368         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3369         res = (struct ipr_resource_entry *)sdev->hostdata;
3370
3371         if (res && ipr_is_gata(res) && qdepth > IPR_MAX_CMD_PER_ATA_LUN)
3372                 qdepth = IPR_MAX_CMD_PER_ATA_LUN;
3373         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3374
3375         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
3376         return sdev->queue_depth;
3377 }
3378
3379 /**
3380  * ipr_change_queue_type - Change the device's queue type
3381  * @dsev:               scsi device struct
3382  * @tag_type:   type of tags to use
3383  *
3384  * Return value:
3385  *      actual queue type set
3386  **/
3387 static int ipr_change_queue_type(struct scsi_device *sdev, int tag_type)
3388 {
3389         struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
3390         struct ipr_resource_entry *res;
3391         unsigned long lock_flags = 0;
3392
3393         spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3394         res = (struct ipr_resource_entry *)sdev->hostdata;
3395
3396         if (res) {
3397                 if (ipr_is_gscsi(res) && sdev->tagged_supported) {
3398                         /*
3399                          * We don't bother quiescing the device here since the
3400                          * adapter firmware does it for us.
3401                          */
3402                         scsi_set_tag_type(sdev, tag_type);
3403
3404                         if (tag_type)
3405                                 scsi_activate_tcq(sdev, sdev->queue_depth);
3406                         else
3407                                 scsi_deactivate_tcq(sdev, sdev->queue_depth);
3408                 } else
3409                         tag_type = 0;
3410         } else
3411                 tag_type = 0;
3412
3413         spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3414         return tag_type;
3415 }
3416
3417 /**
3418  * ipr_show_adapter_handle - Show the adapter's resource handle for this device
3419  * @dev:        device struct
3420  * @buf:        buffer
3421  *