drivers/scsi/pmcraid.h

   1 /*
   2  * pmcraid.h -- PMC Sierra MaxRAID controller driver header file
   3  *
   4  * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
   5  *             PMC-Sierra Inc
   6  *
   7  * Copyright (C) 2008, 2009 PMC Sierra Inc.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #ifndef _PMCRAID_H
  25 #define _PMCRAID_H
  26
  27 #include <linux/version.h>
  28 #include <linux/types.h>
  29 #include <linux/completion.h>
  30 #include <linux/list.h>
  31 #include <scsi/scsi.h>
  32 #include <scsi/scsi_cmnd.h>
  33 #include <linux/cdev.h>
  34 #include <net/netlink.h>
  35 #include <net/genetlink.h>
  36 #include <linux/connector.h>
  37 /*
  38  * Driver name   : string representing the driver name
  39  * Device file   : /dev file to be used for management interfaces
  40  * Driver version: version string in major_version.minor_version.patch format
  41  * Driver date   : date information in "Mon dd yyyy" format
  42  */
  43 #define PMCRAID_DRIVER_NAME             "PMC MaxRAID"
  44 #define PMCRAID_DEVFILE                 "pmcsas"
  45 #define PMCRAID_DRIVER_VERSION          "2.0.2"
  46 #define PMCRAID_DRIVER_DATE             __DATE__
  47
  48 #define PMCRAID_FW_VERSION_1            0x002
  49
  50 /* Maximum number of adapters supported by current version of the driver */
  51 #define PMCRAID_MAX_ADAPTERS            1024
  52
  53 /* Bit definitions as per firmware, bit position [0][1][2].....[31] */
  54 #define PMC_BIT8(n)          (1 << (7-n))
  55 #define PMC_BIT16(n)         (1 << (15-n))
  56 #define PMC_BIT32(n)         (1 << (31-n))
  57
  58 /* PMC PCI vendor ID and device ID values */
  59 #define PCI_VENDOR_ID_PMC                       0x11F8
  60 #define PCI_DEVICE_ID_PMC_MAXRAID               0x5220
  61
  62 /*
  63  * MAX_CMD          : maximum commands that can be outstanding with IOA
  64  * MAX_IO_CMD       : command blocks available for IO commands
  65  * MAX_HCAM_CMD     : command blocks avaibale for HCAMS
  66  * MAX_INTERNAL_CMD : command blocks avaible for internal commands like reset
  67  */
  68 #define PMCRAID_MAX_CMD                         1024
  69 #define PMCRAID_MAX_IO_CMD                      1020
  70 #define PMCRAID_MAX_HCAM_CMD                    2
  71 #define PMCRAID_MAX_INTERNAL_CMD                2
  72
  73 /* MAX_IOADLS       : max number of scatter-gather lists supported by IOA
  74  * IOADLS_INTERNAL  : number of ioadls included as part of IOARCB.
  75  * IOADLS_EXTERNAL  : number of ioadls allocated external to IOARCB
  76  */
  77 #define PMCRAID_IOADLS_INTERNAL                  27
  78 #define PMCRAID_IOADLS_EXTERNAL                  37
  79 #define PMCRAID_MAX_IOADLS                       PMCRAID_IOADLS_INTERNAL
  80
  81 /* HRRQ_ENTRY_SIZE  : size of hrrq buffer
  82  * IOARCB_ALIGNMENT : alignment required for IOARCB
  83  * IOADL_ALIGNMENT  : alignment requirement for IOADLs
  84  * MSIX_VECTORS     : number of MSIX vectors supported
  85  */
  86 #define HRRQ_ENTRY_SIZE                          sizeof(__le32)
  87 #define PMCRAID_IOARCB_ALIGNMENT                 32
  88 #define PMCRAID_IOADL_ALIGNMENT                  16
  89 #define PMCRAID_IOASA_ALIGNMENT                  4
  90 #define PMCRAID_NUM_MSIX_VECTORS                 16
  91
  92 /* various other limits */
  93 #define PMCRAID_VENDOR_ID_LEN                   8
  94 #define PMCRAID_PRODUCT_ID_LEN                  16
  95 #define PMCRAID_SERIAL_NUM_LEN                  8
  96 #define PMCRAID_LUN_LEN                         8
  97 #define PMCRAID_MAX_CDB_LEN                     16
  98 #define PMCRAID_DEVICE_ID_LEN                   8
  99 #define PMCRAID_SENSE_DATA_LEN                  256
 100 #define PMCRAID_ADD_CMD_PARAM_LEN               48
 101
 102 #define PMCRAID_MAX_BUS_TO_SCAN                  1
 103 #define PMCRAID_MAX_NUM_TARGETS_PER_BUS          256
 104 #define PMCRAID_MAX_NUM_LUNS_PER_TARGET          8
 105
 106 /* IOA bus/target/lun number of IOA resources */
 107 #define PMCRAID_IOA_BUS_ID                       0xfe
 108 #define PMCRAID_IOA_TARGET_ID                    0xff
 109 #define PMCRAID_IOA_LUN_ID                       0xff
 110 #define PMCRAID_VSET_BUS_ID                      0x1
 111 #define PMCRAID_VSET_LUN_ID                      0x0
 112 #define PMCRAID_PHYS_BUS_ID                      0x0
 113 #define PMCRAID_VIRTUAL_ENCL_BUS_ID              0x8
 114 #define PMCRAID_MAX_VSET_TARGETS                 0x7F
 115 #define PMCRAID_MAX_VSET_LUNS_PER_TARGET         8
 116
 117 #define PMCRAID_IOA_MAX_SECTORS                  32767
 118 #define PMCRAID_VSET_MAX_SECTORS                 512
 119 #define PMCRAID_MAX_CMD_PER_LUN                  254
 120
 121 /* Number of configuration table entries (resources), includes 1 FP,
 122  * 1 Enclosure device
 123  */
 124 #define PMCRAID_MAX_RESOURCES                    256
 125
 126 /* Adapter Commands used by driver */
 127 #define PMCRAID_QUERY_RESOURCE_STATE             0xC2
 128 #define PMCRAID_RESET_DEVICE                     0xC3
 129 /* options to select reset target */
 130 #define ENABLE_RESET_MODIFIER                    0x80
 131 #define RESET_DEVICE_LUN                         0x40
 132 #define RESET_DEVICE_TARGET                      0x20
 133 #define RESET_DEVICE_BUS                         0x10
 134
 135 #define PMCRAID_IDENTIFY_HRRQ                    0xC4
 136 #define PMCRAID_QUERY_IOA_CONFIG                 0xC5
 137 #define PMCRAID_QUERY_CMD_STATUS                 0xCB
 138 #define PMCRAID_ABORT_CMD                        0xC7
 139
 140 /* CANCEL ALL command, provides option for setting SYNC_COMPLETE
 141  * on the target resources for which commands got cancelled
 142  */
 143 #define PMCRAID_CANCEL_ALL_REQUESTS              0xCE
 144 #define PMCRAID_SYNC_COMPLETE_AFTER_CANCEL       PMC_BIT8(0)
 145
 146 /* HCAM command and types of HCAM supported by IOA */
 147 #define PMCRAID_HOST_CONTROLLED_ASYNC            0xCF
 148 #define PMCRAID_HCAM_CODE_CONFIG_CHANGE          0x01
 149 #define PMCRAID_HCAM_CODE_LOG_DATA               0x02
 150
 151 /* IOA shutdown command and various shutdown types */
 152 #define PMCRAID_IOA_SHUTDOWN                     0xF7
 153 #define PMCRAID_SHUTDOWN_NORMAL                  0x00
 154 #define PMCRAID_SHUTDOWN_PREPARE_FOR_NORMAL      0x40
 155 #define PMCRAID_SHUTDOWN_NONE                    0x100
 156 #define PMCRAID_SHUTDOWN_ABBREV                  0x80
 157
 158 /* SET SUPPORTED DEVICES command and the option to select all the
 159  * devices to be supported
 160  */
 161 #define PMCRAID_SET_SUPPORTED_DEVICES            0xFB
 162 #define ALL_DEVICES_SUPPORTED                    PMC_BIT8(0)
 163
 164 /* This option is used with SCSI WRITE_BUFFER command */
 165 #define PMCRAID_WR_BUF_DOWNLOAD_AND_SAVE         0x05
 166
 167 /* IOASC Codes used by driver */
 168 #define PMCRAID_IOASC_SENSE_MASK                 0xFFFFFF00
 169 #define PMCRAID_IOASC_SENSE_KEY(ioasc)           ((ioasc) >> 24)
 170 #define PMCRAID_IOASC_SENSE_CODE(ioasc)          (((ioasc) & 0x00ff0000) >> 16)
 171 #define PMCRAID_IOASC_SENSE_QUAL(ioasc)          (((ioasc) & 0x0000ff00) >> 8)
 172 #define PMCRAID_IOASC_SENSE_STATUS(ioasc)        ((ioasc) & 0x000000ff)
 173
 174 #define PMCRAID_IOASC_GOOD_COMPLETION                   0x00000000
 175 #define PMCRAID_IOASC_GC_IOARCB_NOTFOUND                0x005A0000
 176 #define PMCRAID_IOASC_NR_INIT_CMD_REQUIRED              0x02040200
 177 #define PMCRAID_IOASC_NR_IOA_RESET_REQUIRED             0x02048000
 178 #define PMCRAID_IOASC_NR_SYNC_REQUIRED                  0x023F0000
 179 #define PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC          0x03110C00
 180 #define PMCRAID_IOASC_HW_CANNOT_COMMUNICATE             0x04050000
 181 #define PMCRAID_IOASC_HW_DEVICE_TIMEOUT                 0x04080100
 182 #define PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR        0x04448500
 183 #define PMCRAID_IOASC_HW_IOA_RESET_REQUIRED             0x04448600
 184 #define PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE        0x05250000
 185 #define PMCRAID_IOASC_AC_TERMINATED_BY_HOST             0x0B5A0000
 186 #define PMCRAID_IOASC_UA_BUS_WAS_RESET                  0x06290000
 187 #define PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER         0x06298000
 188
 189 /* Driver defined IOASCs */
 190 #define PMCRAID_IOASC_IOA_WAS_RESET                     0x10000001
 191 #define PMCRAID_IOASC_PCI_ACCESS_ERROR                  0x10000002
 192
 193 /* Various timeout values (in milliseconds) used. If any of these are chip
 194  * specific, move them to pmcraid_chip_details structure.
 195  */
 196 #define PMCRAID_PCI_DEASSERT_TIMEOUT            2000
 197 #define PMCRAID_BIST_TIMEOUT                    2000
 198 #define PMCRAID_AENWAIT_TIMEOUT                 5000
 199 #define PMCRAID_TRANSOP_TIMEOUT                 60000
 200
 201 #define PMCRAID_RESET_TIMEOUT                   (2 * HZ)
 202 #define PMCRAID_CHECK_FOR_RESET_TIMEOUT         ((HZ / 10))
 203 #define PMCRAID_VSET_IO_TIMEOUT                 (60 * HZ)
 204 #define PMCRAID_INTERNAL_TIMEOUT                (60 * HZ)
 205 #define PMCRAID_SHUTDOWN_TIMEOUT                (150 * HZ)
 206 #define PMCRAID_RESET_BUS_TIMEOUT               (60 * HZ)
 207 #define PMCRAID_RESET_HOST_TIMEOUT              (150 * HZ)
 208 #define PMCRAID_REQUEST_SENSE_TIMEOUT           (30 * HZ)
 209 #define PMCRAID_SET_SUP_DEV_TIMEOUT             (2 * 60 * HZ)
 210
 211 /* structure to represent a scatter-gather element (IOADL descriptor) */
 212 struct pmcraid_ioadl_desc {
 213         __le64 address;
 214         __le32 data_len;
 215         __u8  reserved[3];
 216         __u8  flags;
 217 } __attribute__((packed, aligned(PMCRAID_IOADL_ALIGNMENT)));
 218
 219 /* pmcraid_ioadl_desc.flags values */
 220 #define IOADL_FLAGS_CHAINED      PMC_BIT8(0)
 221 #define IOADL_FLAGS_LAST_DESC    PMC_BIT8(1)
 222 #define IOADL_FLAGS_READ_LAST    PMC_BIT8(1)
 223 #define IOADL_FLAGS_WRITE_LAST   PMC_BIT8(1)
 224
 225
 226 /* additional IOARCB data which can be CDB or additional request parameters
 227  * or list of IOADLs. Firmware supports max of 512 bytes for IOARCB, hence then
 228  * number of IOADLs are limted to 27. In case they are more than 27, they will
 229  * be used in chained form
 230  */
 231 struct pmcraid_ioarcb_add_data {
 232         union {
 233                 struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_INTERNAL];
 234                 __u8 add_cmd_params[PMCRAID_ADD_CMD_PARAM_LEN];
 235         } u;
 236 };
 237
 238 /*
 239  * IOA Request Control Block
 240  */
 241 struct pmcraid_ioarcb {
 242         __le64 ioarcb_bus_addr;
 243         __le32 resource_handle;
 244         __le32 response_handle;
 245         __le64 ioadl_bus_addr;
 246         __le32 ioadl_length;
 247         __le32 data_transfer_length;
 248         __le64 ioasa_bus_addr;
 249         __le16 ioasa_len;
 250         __le16 cmd_timeout;
 251         __le16 add_cmd_param_offset;
 252         __le16 add_cmd_param_length;
 253         __le32 reserved1[2];
 254         __le32 reserved2;
 255         __u8  request_type;
 256         __u8  request_flags0;
 257         __u8  request_flags1;
 258         __u8  hrrq_id;
 259         __u8  cdb[PMCRAID_MAX_CDB_LEN];
 260         struct pmcraid_ioarcb_add_data add_data;
 261 } __attribute__((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
 262
 263 /* well known resource handle values */
 264 #define PMCRAID_IOA_RES_HANDLE        0xffffffff
 265 #define PMCRAID_INVALID_RES_HANDLE    0
 266
 267 /* pmcraid_ioarcb.request_type values */
 268 #define REQ_TYPE_SCSI                 0x00
 269 #define REQ_TYPE_IOACMD               0x01
 270 #define REQ_TYPE_HCAM                 0x02
 271
 272 /* pmcraid_ioarcb.flags0 values */
 273 #define TRANSFER_DIR_WRITE            PMC_BIT8(0)
 274 #define INHIBIT_UL_CHECK              PMC_BIT8(2)
 275 #define SYNC_OVERRIDE                 PMC_BIT8(3)
 276 #define SYNC_COMPLETE                 PMC_BIT8(4)
 277 #define NO_LINK_DESCS                 PMC_BIT8(5)
 278
 279 /* pmcraid_ioarcb.flags1 values */
 280 #define DELAY_AFTER_RESET             PMC_BIT8(0)
 281 #define TASK_TAG_SIMPLE               0x10
 282 #define TASK_TAG_ORDERED              0x20
 283 #define TASK_TAG_QUEUE_HEAD           0x30
 284
 285 /* toggle bit offset in response handle */
 286 #define HRRQ_TOGGLE_BIT               0x01
 287 #define HRRQ_RESPONSE_BIT             0x02
 288
 289 /* IOA Status Area */
 290 struct pmcraid_ioasa_vset {
 291         __le32 failing_lba_hi;
 292         __le32 failing_lba_lo;
 293         __le32 reserved;
 294 } __attribute__((packed, aligned(4)));
 295
 296 struct pmcraid_ioasa {
 297         __le32 ioasc;
 298         __le16 returned_status_length;
 299         __le16 available_status_length;
 300         __le32 residual_data_length;
 301         __le32 ilid;
 302         __le32 fd_ioasc;
 303         __le32 fd_res_address;
 304         __le32 fd_res_handle;
 305         __le32 reserved;
 306
 307         /* resource specific sense information */
 308         union {
 309                 struct pmcraid_ioasa_vset vset;
 310         } u;
 311
 312         /* IOA autosense data */
 313         __le16 auto_sense_length;
 314         __le16 error_data_length;
 315         __u8  sense_data[PMCRAID_SENSE_DATA_LEN];
 316 } __attribute__((packed, aligned(4)));
 317
 318 #define PMCRAID_DRIVER_ILID           0xffffffff
 319
 320 /* Config Table Entry per Resource */
 321 struct pmcraid_config_table_entry {
 322         __u8  resource_type;
 323         __u8  bus_protocol;
 324         __le16 array_id;
 325         __u8  common_flags0;
 326         __u8  common_flags1;
 327         __u8  unique_flags0;
 328         __u8  unique_flags1;    /*also used as vset target_id */
 329         __le32 resource_handle;
 330         __le32 resource_address;
 331         __u8  device_id[PMCRAID_DEVICE_ID_LEN];
 332         __u8  lun[PMCRAID_LUN_LEN];
 333 } __attribute__((packed, aligned(4)));
 334
 335 /* extended configuration table sizes are of 64 bytes in size */
 336 #define PMCRAID_CFGTE_EXT_SIZE  32
 337 struct pmcraid_config_table_entry_ext {
 338         struct pmcraid_config_table_entry cfgte;
 339         __u8  cfgte_ext[PMCRAID_CFGTE_EXT_SIZE];
 340 };
 341
 342 /* resource types (config_table_entry.resource_type values) */
 343 #define RES_TYPE_AF_DASD     0x00
 344 #define RES_TYPE_GSCSI       0x01
 345 #define RES_TYPE_VSET        0x02
 346 #define RES_TYPE_IOA_FP      0xFF
 347
 348 #define RES_IS_IOA(res)      ((res).resource_type == RES_TYPE_IOA_FP)
 349 #define RES_IS_GSCSI(res)    ((res).resource_type == RES_TYPE_GSCSI)
 350 #define RES_IS_VSET(res)     ((res).resource_type == RES_TYPE_VSET)
 351 #define RES_IS_AFDASD(res)   ((res).resource_type == RES_TYPE_AF_DASD)
 352
 353 /* bus_protocol values used by driver */
 354 #define RES_TYPE_VENCLOSURE  0x8
 355
 356 /* config_table_entry.common_flags0 */
 357 #define MULTIPATH_RESOURCE   PMC_BIT32(0)
 358
 359 /* unique_flags1 */
 360 #define IMPORT_MODE_MANUAL   PMC_BIT8(0)
 361
 362 /* well known resource handle values */
 363 #define RES_HANDLE_IOA       0xFFFFFFFF
 364 #define RES_HANDLE_NONE      0x00000000
 365
 366 /* well known resource address values */
 367 #define RES_ADDRESS_IOAFP    0xFEFFFFFF
 368 #define RES_ADDRESS_INVALID  0xFFFFFFFF
 369
 370 /* BUS/TARGET/LUN values from resource_addrr */
 371 #define RES_BUS(res_addr)    (le32_to_cpu(res_addr) & 0xFF)
 372 #define RES_TARGET(res_addr) ((le32_to_cpu(res_addr) >> 16) & 0xFF)
 373 #define RES_LUN(res_addr)    0x0
 374
 375 /* configuration table structure */
 376 struct pmcraid_config_table {
 377         __le16 num_entries;
 378         __u8  table_format;
 379         __u8  reserved1;
 380         __u8  flags;
 381         __u8  reserved2[11];
 382         union {
 383                 struct pmcraid_config_table_entry
 384                                 entries[PMCRAID_MAX_RESOURCES];
 385                 struct pmcraid_config_table_entry_ext
 386                                 entries_ext[PMCRAID_MAX_RESOURCES];
 387         };
 388 } __attribute__((packed, aligned(4)));
 389
 390 /* config_table.flags value */
 391 #define MICROCODE_UPDATE_REQUIRED               PMC_BIT32(0)
 392
 393 /*
 394  * HCAM format
 395  */
 396 #define PMCRAID_HOSTRCB_LDNSIZE                 4056
 397
 398 /* Error log notification format */
 399 struct pmcraid_hostrcb_error {
 400         __le32 fd_ioasc;
 401         __le32 fd_ra;
 402         __le32 fd_rh;
 403         __le32 prc;
 404         union {
 405                 __u8 data[PMCRAID_HOSTRCB_LDNSIZE];
 406         } u;
 407 } __attribute__ ((packed, aligned(4)));
 408
 409 struct pmcraid_hcam_hdr {
 410         __u8  op_code;
 411         __u8  notification_type;
 412         __u8  notification_lost;
 413         __u8  flags;
 414         __u8  overlay_id;
 415         __u8  reserved1[3];
 416         __le32 ilid;
 417         __le32 timestamp1;
 418         __le32 timestamp2;
 419         __le32 data_len;
 420 } __attribute__((packed, aligned(4)));
 421
 422 #define PMCRAID_AEN_GROUP       0x3
 423
 424 struct pmcraid_hcam_ccn {
 425         struct pmcraid_hcam_hdr header;
 426         struct pmcraid_config_table_entry cfg_entry;
 427         struct pmcraid_config_table_entry cfg_entry_old;
 428 } __attribute__((packed, aligned(4)));
 429
 430 #define PMCRAID_CCN_EXT_SIZE    3944
 431 struct pmcraid_hcam_ccn_ext {
 432         struct pmcraid_hcam_hdr header;
 433         struct pmcraid_config_table_entry_ext cfg_entry;
 434         struct pmcraid_config_table_entry_ext cfg_entry_old;
 435         __u8   reserved[PMCRAID_CCN_EXT_SIZE];
 436 } __attribute__((packed, aligned(4)));
 437
 438 struct pmcraid_hcam_ldn {
 439         struct pmcraid_hcam_hdr header;
 440         struct pmcraid_hostrcb_error error_log;
 441 } __attribute__((packed, aligned(4)));
 442
 443 /* pmcraid_hcam.op_code values */
 444 #define HOSTRCB_TYPE_CCN                        0xE1
 445 #define HOSTRCB_TYPE_LDN                        0xE2
 446
 447 /* pmcraid_hcam.notification_type values */
 448 #define NOTIFICATION_TYPE_ENTRY_CHANGED         0x0
 449 #define NOTIFICATION_TYPE_ENTRY_NEW             0x1
 450 #define NOTIFICATION_TYPE_ENTRY_DELETED         0x2
 451 #define NOTIFICATION_TYPE_STATE_CHANGE          0x3
 452 #define NOTIFICATION_TYPE_ENTRY_STATECHANGED    0x4
 453 #define NOTIFICATION_TYPE_ERROR_LOG             0x10
 454 #define NOTIFICATION_TYPE_INFORMATION_LOG       0x11
 455
 456 #define HOSTRCB_NOTIFICATIONS_LOST              PMC_BIT8(0)
 457
 458 /* pmcraid_hcam.flags values */
 459 #define HOSTRCB_INTERNAL_OP_ERROR               PMC_BIT8(0)
 460 #define HOSTRCB_ERROR_RESPONSE_SENT             PMC_BIT8(1)
 461
 462 /* pmcraid_hcam.overlay_id values */
 463 #define HOSTRCB_OVERLAY_ID_08                   0x08
 464 #define HOSTRCB_OVERLAY_ID_09                   0x09
 465 #define HOSTRCB_OVERLAY_ID_11                   0x11
 466 #define HOSTRCB_OVERLAY_ID_12                   0x12
 467 #define HOSTRCB_OVERLAY_ID_13                   0x13
 468 #define HOSTRCB_OVERLAY_ID_14                   0x14
 469 #define HOSTRCB_OVERLAY_ID_16                   0x16
 470 #define HOSTRCB_OVERLAY_ID_17                   0x17
 471 #define HOSTRCB_OVERLAY_ID_20                   0x20
 472 #define HOSTRCB_OVERLAY_ID_FF                   0xFF
 473
 474 /* Implementation specific card details */
 475 struct pmcraid_chip_details {
 476         /* hardware register offsets */
 477         unsigned long  ioastatus;
 478         unsigned long  ioarrin;
 479         unsigned long  mailbox;
 480         unsigned long  global_intr_mask;
 481         unsigned long  ioa_host_intr;
 482         unsigned long  ioa_host_msix_intr;
 483         unsigned long  ioa_host_intr_clr;
 484         unsigned long  ioa_host_mask;
 485         unsigned long  ioa_host_mask_clr;
 486         unsigned long  host_ioa_intr;
 487         unsigned long  host_ioa_intr_clr;
 488
 489         /* timeout used during transitional to operational state */
 490         unsigned long transop_timeout;
 491 };
 492
 493 /* IOA to HOST doorbells (interrupts) */
 494 #define INTRS_TRANSITION_TO_OPERATIONAL         PMC_BIT32(0)
 495 #define INTRS_IOARCB_TRANSFER_FAILED            PMC_BIT32(3)
 496 #define INTRS_IOA_UNIT_CHECK                    PMC_BIT32(4)
 497 #define INTRS_NO_HRRQ_FOR_CMD_RESPONSE          PMC_BIT32(5)
 498 #define INTRS_CRITICAL_OP_IN_PROGRESS           PMC_BIT32(6)
 499 #define INTRS_IO_DEBUG_ACK                      PMC_BIT32(7)
 500 #define INTRS_IOARRIN_LOST                      PMC_BIT32(27)
 501 #define INTRS_SYSTEM_BUS_MMIO_ERROR             PMC_BIT32(28)
 502 #define INTRS_IOA_PROCESSOR_ERROR               PMC_BIT32(29)
 503 #define INTRS_HRRQ_VALID                        PMC_BIT32(30)
 504 #define INTRS_OPERATIONAL_STATUS                PMC_BIT32(0)
 505 #define INTRS_ALLOW_MSIX_VECTOR0                PMC_BIT32(31)
 506
 507 /* Host to IOA Doorbells */
 508 #define DOORBELL_RUNTIME_RESET                  PMC_BIT32(1)
 509 #define DOORBELL_IOA_RESET_ALERT                PMC_BIT32(7)
 510 #define DOORBELL_IOA_DEBUG_ALERT                PMC_BIT32(9)
 511 #define DOORBELL_ENABLE_DESTRUCTIVE_DIAGS       PMC_BIT32(8)
 512 #define DOORBELL_IOA_START_BIST                 PMC_BIT32(23)
 513 #define DOORBELL_INTR_MODE_MSIX                 PMC_BIT32(25)
 514 #define DOORBELL_INTR_MSIX_CLR                  PMC_BIT32(26)
 515 #define DOORBELL_RESET_IOA                      PMC_BIT32(31)
 516
 517 /* Global interrupt mask register value */
 518 #define GLOBAL_INTERRUPT_MASK                   0x5ULL
 519
 520 #define PMCRAID_ERROR_INTERRUPTS        (INTRS_IOARCB_TRANSFER_FAILED | \
 521                                          INTRS_IOA_UNIT_CHECK | \
 522                                          INTRS_NO_HRRQ_FOR_CMD_RESPONSE | \
 523                                          INTRS_IOARRIN_LOST | \
 524                                          INTRS_SYSTEM_BUS_MMIO_ERROR | \
 525                                          INTRS_IOA_PROCESSOR_ERROR)
 526
 527 #define PMCRAID_PCI_INTERRUPTS          (PMCRAID_ERROR_INTERRUPTS | \
 528                                          INTRS_HRRQ_VALID | \
 529                                          INTRS_TRANSITION_TO_OPERATIONAL |\
 530                                          INTRS_ALLOW_MSIX_VECTOR0)
 531
 532 /* control_block, associated with each of the commands contains IOARCB, IOADLs
 533  * memory for IOASA. Additional 3 * 16 bytes are allocated in order to support
 534  * additional request parameters (of max size 48) any command.
 535  */
 536 struct pmcraid_control_block {
 537         struct pmcraid_ioarcb ioarcb;
 538         struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_EXTERNAL + 3];
 539         struct pmcraid_ioasa ioasa;
 540 } __attribute__ ((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
 541
 542 /* pmcraid_sglist - Scatter-gather list allocated for passthrough ioctls
 543  */
 544 struct pmcraid_sglist {
 545         u32 order;
 546         u32 num_sg;
 547         u32 num_dma_sg;
 548         u32 buffer_len;
 549         struct scatterlist scatterlist[1];
 550 };
 551
 552 /* page D0 inquiry data of focal point resource */
 553 struct pmcraid_inquiry_data {
 554         __u8    ph_dev_type;
 555         __u8    page_code;
 556         __u8    reserved1;
 557         __u8    add_page_len;
 558         __u8    length;
 559         __u8    reserved2;
 560         __le16  fw_version;
 561         __u8    reserved3[16];
 562 };
 563
 564 /* pmcraid_cmd - LLD representation of SCSI command */
 565 struct pmcraid_cmd {
 566
 567         /* Ptr and bus address of DMA.able control block for this command */
 568         struct pmcraid_control_block *ioa_cb;
 569         dma_addr_t ioa_cb_bus_addr;
 570         dma_addr_t dma_handle;
 571         u8 *sense_buffer;
 572
 573         /* pointer to mid layer structure of SCSI commands */
 574         struct scsi_cmnd *scsi_cmd;
 575
 576         struct list_head free_list;
 577         struct completion wait_for_completion;
 578         struct timer_list timer;        /* needed for internal commands */
 579         u32 timeout;                    /* current timeout value */
 580         u32 index;                      /* index into the command list */
 581         u8 completion_req;              /* for handling internal commands */
 582         u8 release;                     /* for handling completions */
 583
 584         void (*cmd_done) (struct pmcraid_cmd *);
 585         struct pmcraid_instance *drv_inst;
 586
 587         struct pmcraid_sglist *sglist; /* used for passthrough IOCTLs */
 588
 589         /* scratch used */
 590         union {
 591                 /* during reset sequence */
 592                 unsigned long time_left;
 593                 struct pmcraid_resource_entry *res;
 594                 int hrrq_index;
 595
 596                 /* used during IO command error handling. Sense buffer
 597                  * for REQUEST SENSE command if firmware is not sending
 598                  * auto sense data
 599                  */
 600                 struct  {
 601                         u8 *sense_buffer;
 602                         dma_addr_t sense_buffer_dma;
 603                 };
 604         };
 605 };
 606
 607 /*
 608  * Interrupt registers of IOA
 609  */
 610 struct pmcraid_interrupts {
 611         void __iomem *ioa_host_interrupt_reg;
 612         void __iomem *ioa_host_msix_interrupt_reg;
 613         void __iomem *ioa_host_interrupt_clr_reg;
 614         void __iomem *ioa_host_interrupt_mask_reg;
 615         void __iomem *ioa_host_interrupt_mask_clr_reg;
 616         void __iomem *global_interrupt_mask_reg;
 617         void __iomem *host_ioa_interrupt_reg;
 618         void __iomem *host_ioa_interrupt_clr_reg;
 619 };
 620
 621 /* ISR parameters LLD allocates (one for each MSI-X if enabled) vectors */
 622 struct pmcraid_isr_param {
 623         struct pmcraid_instance *drv_inst;
 624         u16 vector;                     /* allocated msi-x vector */
 625         u8 hrrq_id;                     /* hrrq entry index */
 626 };
 627
 628
 629 /* AEN message header sent as part of event data to applications */
 630 struct pmcraid_aen_msg {
 631         u32 hostno;
 632         u32 length;
 633         u8  reserved[8];
 634         u8  data[0];
 635 };
 636
 637 /* Controller state event message type */
 638 struct pmcraid_state_msg {
 639         struct pmcraid_aen_msg msg;
 640         u32 ioa_state;
 641 };
 642
 643 #define PMC_DEVICE_EVENT_RESET_START            0x11000000
 644 #define PMC_DEVICE_EVENT_RESET_SUCCESS          0x11000001
 645 #define PMC_DEVICE_EVENT_RESET_FAILED           0x11000002
 646 #define PMC_DEVICE_EVENT_SHUTDOWN_START         0x11000003
 647 #define PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS       0x11000004
 648 #define PMC_DEVICE_EVENT_SHUTDOWN_FAILED        0x11000005
 649
 650 struct pmcraid_hostrcb {
 651         struct pmcraid_instance *drv_inst;
 652         struct pmcraid_aen_msg *msg;
 653         struct pmcraid_hcam_hdr *hcam;  /* pointer to hcam buffer */
 654         struct pmcraid_cmd  *cmd;       /* pointer to command block used */
 655         dma_addr_t baddr;               /* system address of hcam buffer */
 656         atomic_t ignore;                /* process HCAM response ? */
 657 };
 658
 659 #define PMCRAID_AEN_HDR_SIZE    sizeof(struct pmcraid_aen_msg)
 660
 661
 662
 663 /*
 664  * Per adapter structure maintained by LLD
 665  */
 666 struct pmcraid_instance {
 667         /* Array of allowed-to-be-exposed resources, initialized from
 668          * Configutation Table, later updated with CCNs
 669          */
 670         struct pmcraid_resource_entry *res_entries;
 671
 672         struct list_head free_res_q;    /* res_entries lists for easy lookup */
 673         struct list_head used_res_q;    /* List of to be exposed resources */
 674         spinlock_t resource_lock;       /* spinlock to protect resource list */
 675
 676         void __iomem *mapped_dma_addr;
 677         void __iomem *ioa_status;       /* Iomapped IOA status register */
 678         void __iomem *mailbox;          /* Iomapped mailbox register */
 679         void __iomem *ioarrin;          /* IOmapped IOARR IN register */
 680
 681         struct pmcraid_interrupts int_regs;
 682         struct pmcraid_chip_details *chip_cfg;
 683
 684         /* HostRCBs needed for HCAM */
 685         struct pmcraid_hostrcb ldn;
 686         struct pmcraid_hostrcb ccn;
 687         struct pmcraid_state_msg scn;   /* controller state change msg */
 688
 689
 690         /* Bus address of start of HRRQ */
 691         dma_addr_t hrrq_start_bus_addr[PMCRAID_NUM_MSIX_VECTORS];
 692
 693         /* Pointer to 1st entry of HRRQ */
 694         __be32 *hrrq_start[PMCRAID_NUM_MSIX_VECTORS];
 695
 696         /* Pointer to last entry of HRRQ */
 697         __be32 *hrrq_end[PMCRAID_NUM_MSIX_VECTORS];
 698
 699         /* Pointer to current pointer of hrrq */
 700         __be32 *hrrq_curr[PMCRAID_NUM_MSIX_VECTORS];
 701
 702         /* Lock for HRRQ access */
 703         spinlock_t hrrq_lock[PMCRAID_NUM_MSIX_VECTORS];
 704
 705         struct pmcraid_inquiry_data *inq_data;
 706         dma_addr_t  inq_data_baddr;
 707
 708         /* size of configuration table entry, varies based on the firmware */
 709         u32     config_table_entry_size;
 710
 711         /* Expected toggle bit at host */
 712         u8 host_toggle_bit[PMCRAID_NUM_MSIX_VECTORS];
 713
 714
 715         /* Wait Q for  threads to wait for Reset IOA completion */
 716         wait_queue_head_t reset_wait_q;
 717         struct pmcraid_cmd *reset_cmd;
 718
 719         /* structures for supporting SIGIO based AEN. */
 720         struct fasync_struct *aen_queue;
 721         struct mutex aen_queue_lock;    /* lock for aen subscribers list */
 722         struct cdev cdev;
 723
 724         struct Scsi_Host *host; /* mid layer interface structure handle */
 725         struct pci_dev *pdev;   /* PCI device structure handle */
 726
 727         /* No of Reset IOA retries . IOA marked dead if threshold exceeds */
 728         u8 ioa_reset_attempts;
 729 #define PMCRAID_RESET_ATTEMPTS 3
 730
 731         u8  current_log_level;  /* default level for logging IOASC errors */
 732
 733         u8  num_hrrq;           /* Number of interrupt vectors allocated */
 734         u8  interrupt_mode;     /* current interrupt mode legacy or msix */
 735         dev_t dev;              /* Major-Minor numbers for Char device */
 736
 737         /* Used as ISR handler argument */
 738         struct pmcraid_isr_param hrrq_vector[PMCRAID_NUM_MSIX_VECTORS];
 739
 740         /* Message id as filled in last fired IOARCB, used to identify HRRQ */
 741         atomic_t last_message_id;
 742
 743         /* configuration table */
 744         struct pmcraid_config_table *cfg_table;
 745         dma_addr_t cfg_table_bus_addr;
 746
 747         /* structures related to command blocks */
 748         struct kmem_cache *cmd_cachep;          /* cache for cmd blocks */
 749         struct pci_pool *control_pool;          /* pool for control blocks */
 750         char   cmd_pool_name[64];               /* name of cmd cache */
 751         char   ctl_pool_name[64];               /* name of control cache */
 752
 753         struct pmcraid_cmd *cmd_list[PMCRAID_MAX_CMD];
 754
 755         struct list_head free_cmd_pool;
 756         struct list_head pending_cmd_pool;
 757         spinlock_t free_pool_lock;              /* free pool lock */
 758         spinlock_t pending_pool_lock;           /* pending pool lock */
 759
 760         /* Tasklet to handle deferred processing */
 761         struct tasklet_struct isr_tasklet[PMCRAID_NUM_MSIX_VECTORS];
 762
 763         /* Work-queue (Shared) for deferred reset processing */
 764         struct work_struct worker_q;
 765
 766         /* No of IO commands pending with FW */
 767         atomic_t outstanding_cmds;
 768
 769         /* should add/delete resources to mid-layer now ?*/
 770         atomic_t expose_resources;
 771
 772
 773
 774         u32 ioa_state:4;        /* For IOA Reset sequence FSM */
 775 #define IOA_STATE_OPERATIONAL       0x0
 776 #define IOA_STATE_UNKNOWN           0x1
 777 #define IOA_STATE_DEAD              0x2
 778 #define IOA_STATE_IN_SOFT_RESET     0x3
 779 #define IOA_STATE_IN_HARD_RESET     0x4
 780 #define IOA_STATE_IN_RESET_ALERT    0x5
 781 #define IOA_STATE_IN_BRINGDOWN      0x6
 782 #define IOA_STATE_IN_BRINGUP        0x7
 783
 784         u32 ioa_reset_in_progress:1; /* true if IOA reset is in progress */
 785         u32 ioa_hard_reset:1;   /* TRUE if Hard Reset is needed */
 786         u32 ioa_unit_check:1;   /* Indicates Unit Check condition */
 787         u32 ioa_bringdown:1;    /* whether IOA needs to be brought down */
 788         u32 force_ioa_reset:1;  /* force adapter reset ? */
 789         u32 reinit_cfg_table:1; /* reinit config table due to lost CCN */
 790         u32 ioa_shutdown_type:2;/* shutdown type used during reset */
 791 #define SHUTDOWN_NONE               0x0
 792 #define SHUTDOWN_NORMAL             0x1
 793 #define SHUTDOWN_ABBREV             0x2
 794
 795 };
 796
 797 /* LLD maintained resource entry structure */
 798 struct pmcraid_resource_entry {
 799         struct list_head queue; /* link to "to be exposed" resources */
 800         union {
 801                 struct pmcraid_config_table_entry cfg_entry;
 802                 struct pmcraid_config_table_entry_ext cfg_entry_ext;
 803         };
 804         struct scsi_device *scsi_dev;   /* Link scsi_device structure */
 805         atomic_t read_failures;         /* count of failed READ commands */
 806         atomic_t write_failures;        /* count of failed WRITE commands */
 807
 808         /* To indicate add/delete/modify during CCN */
 809         u8 change_detected;
 810 #define RES_CHANGE_ADD          0x1     /* add this to mid-layer */
 811 #define RES_CHANGE_DEL          0x2     /* remove this from mid-layer */
 812
 813         u8 reset_progress;      /* Device is resetting */
 814
 815         /*
 816          * When IOA asks for sync (i.e. IOASC = Not Ready, Sync Required), this
 817          * flag will be set, mid layer will be asked to retry. In the next
 818          * attempt, this flag will be checked in queuecommand() to set
 819          * SYNC_COMPLETE flag in IOARCB (flag_0).
 820          */
 821         u8 sync_reqd;
 822
 823         /* target indicates the mapped target_id assigned to this resource if
 824          * this is VSET resource. For non-VSET resources this will be un-used
 825          * or zero
 826          */
 827         u8 target;
 828 };
 829
 830 /* Data structures used in IOASC error code logging */
 831 struct pmcraid_ioasc_error {
 832         u32 ioasc_code;         /* IOASC code */
 833         u8 log_level;           /* default log level assignment. */
 834         char *error_string;
 835 };
 836
 837 /* Initial log_level assignments for various IOASCs */
 838 #define IOASC_LOG_LEVEL_NONE        0x0 /* no logging */
 839 #define IOASC_LOG_LEVEL_MUST        0x1 /* must log: all high-severity errors */
 840 #define IOASC_LOG_LEVEL_HARD        0x2 /* optional – low severity errors */
 841
 842 /* Error information maintained by LLD. LLD initializes the pmcraid_error_table
 843  * statically.
 844  */
 845 static struct pmcraid_ioasc_error pmcraid_ioasc_error_table[] = {
 846         {0x01180600, IOASC_LOG_LEVEL_HARD,
 847          "Recovered Error, soft media error, sector reassignment suggested"},
 848         {0x015D0000, IOASC_LOG_LEVEL_HARD,
 849          "Recovered Error, failure prediction thresold exceeded"},
 850         {0x015D9200, IOASC_LOG_LEVEL_HARD,
 851          "Recovered Error, soft Cache Card Battery error thresold"},
 852         {0x015D9200, IOASC_LOG_LEVEL_HARD,
 853          "Recovered Error, soft Cache Card Battery error thresold"},
 854         {0x02048000, IOASC_LOG_LEVEL_HARD,
 855          "Not Ready, IOA Reset Required"},
 856         {0x02408500, IOASC_LOG_LEVEL_HARD,
 857          "Not Ready, IOA microcode download required"},
 858         {0x03110B00, IOASC_LOG_LEVEL_HARD,
 859          "Medium Error, data unreadable, reassignment suggested"},
 860         {0x03110C00, IOASC_LOG_LEVEL_MUST,
 861          "Medium Error, data unreadable do not reassign"},
 862         {0x03310000, IOASC_LOG_LEVEL_HARD,
 863          "Medium Error, media corrupted"},
 864         {0x04050000, IOASC_LOG_LEVEL_HARD,
 865          "Hardware Error, IOA can't communicate with device"},
 866         {0x04080000, IOASC_LOG_LEVEL_MUST,
 867          "Hardware Error, device bus error"},
 868         {0x04088000, IOASC_LOG_LEVEL_MUST,
 869          "Hardware Error, device bus is not functioning"},
 870         {0x04118000, IOASC_LOG_LEVEL_HARD,
 871          "Hardware Error, IOA reserved area data check"},
 872         {0x04118100, IOASC_LOG_LEVEL_HARD,
 873          "Hardware Error, IOA reserved area invalid data pattern"},
 874         {0x04118200, IOASC_LOG_LEVEL_HARD,
 875          "Hardware Error, IOA reserved area LRC error"},
 876         {0x04320000, IOASC_LOG_LEVEL_HARD,
 877          "Hardware Error, reassignment space exhausted"},
 878         {0x04330000, IOASC_LOG_LEVEL_HARD,
 879          "Hardware Error, data transfer underlength error"},
 880         {0x04330000, IOASC_LOG_LEVEL_HARD,
 881          "Hardware Error, data transfer overlength error"},
 882         {0x04418000, IOASC_LOG_LEVEL_MUST,
 883          "Hardware Error, PCI bus error"},
 884         {0x04440000, IOASC_LOG_LEVEL_HARD,
 885          "Hardware Error, device error"},
 886         {0x04448200, IOASC_LOG_LEVEL_MUST,
 887          "Hardware Error, IOA error"},
 888         {0x04448300, IOASC_LOG_LEVEL_HARD,
 889          "Hardware Error, undefined device response"},
 890         {0x04448400, IOASC_LOG_LEVEL_HARD,
 891          "Hardware Error, IOA microcode error"},
 892         {0x04448600, IOASC_LOG_LEVEL_HARD,
 893          "Hardware Error, IOA reset required"},
 894         {0x04449200, IOASC_LOG_LEVEL_HARD,
 895          "Hardware Error, hard Cache Fearuee Card Battery error"},
 896         {0x0444A000, IOASC_LOG_LEVEL_HARD,
 897          "Hardware Error, failed device altered"},
 898         {0x0444A200, IOASC_LOG_LEVEL_HARD,
 899          "Hardware Error, data check after reassignment"},
 900         {0x0444A300, IOASC_LOG_LEVEL_HARD,
 901          "Hardware Error, LRC error after reassignment"},
 902         {0x044A0000, IOASC_LOG_LEVEL_HARD,
 903          "Hardware Error, device bus error (msg/cmd phase)"},
 904         {0x04670400, IOASC_LOG_LEVEL_HARD,
 905          "Hardware Error, new device can't be used"},
 906         {0x04678000, IOASC_LOG_LEVEL_HARD,
 907          "Hardware Error, invalid multiadapter configuration"},
 908         {0x04678100, IOASC_LOG_LEVEL_HARD,
 909          "Hardware Error, incorrect connection between enclosures"},
 910         {0x04678200, IOASC_LOG_LEVEL_HARD,
 911          "Hardware Error, connections exceed IOA design limits"},
 912         {0x04678300, IOASC_LOG_LEVEL_HARD,
 913          "Hardware Error, incorrect multipath connection"},
 914         {0x04679000, IOASC_LOG_LEVEL_HARD,
 915          "Hardware Error, command to LUN failed"},
 916         {0x064C8000, IOASC_LOG_LEVEL_HARD,
 917          "Unit Attention, cache exists for missing/failed device"},
 918         {0x06670100, IOASC_LOG_LEVEL_HARD,
 919          "Unit Attention, incompatible exposed mode device"},
 920         {0x06670600, IOASC_LOG_LEVEL_HARD,
 921          "Unit Attention, attachment of logical unit failed"},
 922         {0x06678000, IOASC_LOG_LEVEL_HARD,
 923          "Unit Attention, cables exceed connective design limit"},
 924         {0x06678300, IOASC_LOG_LEVEL_HARD,
 925          "Unit Attention, incomplete multipath connection between" \
 926          "IOA and enclosure"},
 927         {0x06678400, IOASC_LOG_LEVEL_HARD,
 928          "Unit Attention, incomplete multipath connection between" \
 929          "device and enclosure"},
 930         {0x06678500, IOASC_LOG_LEVEL_HARD,
 931          "Unit Attention, incomplete multipath connection between" \
 932          "IOA and remote IOA"},
 933         {0x06678600, IOASC_LOG_LEVEL_HARD,
 934          "Unit Attention, missing remote IOA"},
 935         {0x06679100, IOASC_LOG_LEVEL_HARD,
 936          "Unit Attention, enclosure doesn't support required multipath" \
 937          "function"},
 938         {0x06698200, IOASC_LOG_LEVEL_HARD,
 939          "Unit Attention, corrupt array parity detected on device"},
 940         {0x066B0200, IOASC_LOG_LEVEL_HARD,
 941          "Unit Attention, array exposed"},
 942         {0x066B8200, IOASC_LOG_LEVEL_HARD,
 943          "Unit Attention, exposed array is still protected"},
 944         {0x066B9200, IOASC_LOG_LEVEL_HARD,
 945          "Unit Attention, Multipath redundancy level got worse"},
 946         {0x07270000, IOASC_LOG_LEVEL_HARD,
 947          "Data Protect, device is read/write protected by IOA"},
 948         {0x07278000, IOASC_LOG_LEVEL_HARD,
 949          "Data Protect, IOA doesn't support device attribute"},
 950         {0x07278100, IOASC_LOG_LEVEL_HARD,
 951          "Data Protect, NVRAM mirroring prohibited"},
 952         {0x07278400, IOASC_LOG_LEVEL_HARD,
 953          "Data Protect, array is short 2 or more devices"},
 954         {0x07278600, IOASC_LOG_LEVEL_HARD,
 955          "Data Protect, exposed array is short a required device"},
 956         {0x07278700, IOASC_LOG_LEVEL_HARD,
 957          "Data Protect, array members not at required addresses"},
 958         {0x07278800, IOASC_LOG_LEVEL_HARD,
 959          "Data Protect, exposed mode device resource address conflict"},
 960         {0x07278900, IOASC_LOG_LEVEL_HARD,
 961          "Data Protect, incorrect resource address of exposed mode device"},
 962         {0x07278A00, IOASC_LOG_LEVEL_HARD,
 963          "Data Protect, Array is missing a device and parity is out of sync"},
 964         {0x07278B00, IOASC_LOG_LEVEL_HARD,
 965          "Data Protect, maximum number of arrays already exist"},
 966         {0x07278C00, IOASC_LOG_LEVEL_HARD,
 967          "Data Protect, cannot locate cache data for device"},
 968         {0x07278D00, IOASC_LOG_LEVEL_HARD,
 969          "Data Protect, cache data exits for a changed device"},
 970         {0x07279100, IOASC_LOG_LEVEL_HARD,
 971          "Data Protect, detection of a device requiring format"},
 972         {0x07279200, IOASC_LOG_LEVEL_HARD,
 973          "Data Protect, IOA exceeds maximum number of devices"},
 974         {0x07279600, IOASC_LOG_LEVEL_HARD,
 975          "Data Protect, missing array, volume set is not functional"},
 976         {0x07279700, IOASC_LOG_LEVEL_HARD,
 977          "Data Protect, single device for a volume set"},
 978         {0x07279800, IOASC_LOG_LEVEL_HARD,
 979          "Data Protect, missing multiple devices for a volume set"},
 980         {0x07279900, IOASC_LOG_LEVEL_HARD,
 981          "Data Protect, maximum number of volument sets already exists"},
 982         {0x07279A00, IOASC_LOG_LEVEL_HARD,
 983          "Data Protect, other volume set problem"},
 984 };
 985
 986 /* macros to help in debugging */
 987 #define pmcraid_err(...)  \
 988         printk(KERN_ERR "MaxRAID: "__VA_ARGS__)
 989
 990 #define pmcraid_info(...) \
 991         if (pmcraid_debug_log) \
 992                 printk(KERN_INFO "MaxRAID: "__VA_ARGS__)
 993
 994 /* check if given command is a SCSI READ or SCSI WRITE command */
 995 #define SCSI_READ_CMD           0x1     /* any of SCSI READ commands */
 996 #define SCSI_WRITE_CMD          0x2     /* any of SCSI WRITE commands */
 997 #define SCSI_CMD_TYPE(opcode) \
 998 ({  u8 op = opcode; u8 __type = 0;\
 999         if (op == READ_6 || op == READ_10 || op == READ_12 || op == READ_16)\
1000                 __type = SCSI_READ_CMD;\
1001         else if (op == WRITE_6 || op == WRITE_10 || op == WRITE_12 || \
1002                  op == WRITE_16)\
1003                 __type = SCSI_WRITE_CMD;\
1004         __type;\
1005 })
1006
1007 #define IS_SCSI_READ_WRITE(opcode) \
1008 ({      u8 __type = SCSI_CMD_TYPE(opcode); \
1009         (__type == SCSI_READ_CMD || __type == SCSI_WRITE_CMD) ? 1 : 0;\
1010 })
1011
1012
1013 /*
1014  * pmcraid_ioctl_header - definition of header structure that preceeds all the
1015  * buffers given as ioctl arguments.
1016  *
1017  * .signature           : always ASCII string, "PMCRAID"
1018  * .reserved            : not used
1019  * .buffer_length       : length of the buffer following the header
1020  */
1021 struct pmcraid_ioctl_header {
1022         u8  signature[8];
1023         u32 reserved;
1024         u32 buffer_length;
1025 };
1026
1027 #define PMCRAID_IOCTL_SIGNATURE      "PMCRAID"
1028
1029 /*
1030  * pmcraid_passthrough_ioctl_buffer - structure given as argument to
1031  * passthrough(or firmware handled) IOCTL commands. Note that ioarcb requires
1032  * 32-byte alignment so, it is necessary to pack this structure to avoid any
1033  * holes between ioctl_header and passthrough buffer
1034  *
1035  * .ioactl_header : ioctl header
1036  * .ioarcb        : filled-up ioarcb buffer, driver always reads this buffer
1037  * .ioasa         : buffer for ioasa, driver fills this with IOASA from firmware
1038  * .request_buffer: The I/O buffer (flat), driver reads/writes to this based on
1039  *                  the transfer directions passed in ioarcb.flags0. Contents
1040  *                  of this buffer are valid only when ioarcb.data_transfer_len
1041  *                  is not zero.
1042  */
1043 struct pmcraid_passthrough_ioctl_buffer {
1044         struct pmcraid_ioctl_header ioctl_header;
1045         struct pmcraid_ioarcb ioarcb;
1046         struct pmcraid_ioasa  ioasa;
1047         u8  request_buffer[1];
1048 } __attribute__ ((packed));
1049
1050 /*
1051  * keys to differentiate between driver handled IOCTLs and passthrough
1052  * IOCTLs passed to IOA. driver determines the ioctl type using macro
1053  * _IOC_TYPE
1054  */
1055 #define PMCRAID_DRIVER_IOCTL         'D'
1056 #define PMCRAID_PASSTHROUGH_IOCTL    'F'
1057
1058 #define DRV_IOCTL(n, size) \
1059     _IOC(_IOC_READ|_IOC_WRITE, PMCRAID_DRIVER_IOCTL, (n), (size))
1060
1061 #define FMW_IOCTL(n, size) \
1062     _IOC(_IOC_READ|_IOC_WRITE, PMCRAID_PASSTHROUGH_IOCTL,  (n), (size))
1063
1064 /*
1065  * _ARGSIZE: macro that gives size of the argument type passed to an IOCTL cmd.
1066  * This is to facilitate applications avoiding un-necessary memory allocations.
1067  * For example, most of driver handled ioctls do not require ioarcb, ioasa.
1068  */
1069 #define _ARGSIZE(arg) (sizeof(struct pmcraid_ioctl_header) + sizeof(arg))
1070
1071 /* Driver handled IOCTL command definitions */
1072
1073 #define PMCRAID_IOCTL_RESET_ADAPTER          \
1074         DRV_IOCTL(5, sizeof(struct pmcraid_ioctl_header))
1075
1076 /* passthrough/firmware handled commands */
1077 #define PMCRAID_IOCTL_PASSTHROUGH_COMMAND         \
1078         FMW_IOCTL(1, sizeof(struct pmcraid_passthrough_ioctl_buffer))
1079
1080 #define PMCRAID_IOCTL_DOWNLOAD_MICROCODE     \
1081         FMW_IOCTL(2, sizeof(struct pmcraid_passthrough_ioctl_buffer))
1082
1083
1084 #endif /* _PMCRAID_H */