root/drivers/scsi/pmcraid.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * pmcraid.h -- PMC Sierra MaxRAID controller driver header file
   4  *
   5  * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
   6  *             PMC-Sierra Inc
   7  *
   8  * Copyright (C) 2008, 2009 PMC Sierra Inc.
   9  */
  10 
  11 #ifndef _PMCRAID_H
  12 #define _PMCRAID_H
  13 
  14 #include <linux/types.h>
  15 #include <linux/completion.h>
  16 #include <linux/list.h>
  17 #include <scsi/scsi.h>
  18 #include <scsi/scsi_cmnd.h>
  19 #include <linux/cdev.h>
  20 #include <net/netlink.h>
  21 #include <net/genetlink.h>
  22 #include <linux/connector.h>
  23 /*
  24  * Driver name   : string representing the driver name
  25  * Device file   : /dev file to be used for management interfaces
  26  * Driver version: version string in major_version.minor_version.patch format
  27  * Driver date   : date information in "Mon dd yyyy" format
  28  */
  29 #define PMCRAID_DRIVER_NAME             "PMC MaxRAID"
  30 #define PMCRAID_DEVFILE                 "pmcsas"
  31 #define PMCRAID_DRIVER_VERSION          "1.0.3"
  32 
  33 #define PMCRAID_FW_VERSION_1            0x002
  34 
  35 /* Maximum number of adapters supported by current version of the driver */
  36 #define PMCRAID_MAX_ADAPTERS            1024
  37 
  38 /* Bit definitions as per firmware, bit position [0][1][2].....[31] */
  39 #define PMC_BIT8(n)          (1 << (7-n))
  40 #define PMC_BIT16(n)         (1 << (15-n))
  41 #define PMC_BIT32(n)         (1 << (31-n))
  42 
  43 /* PMC PCI vendor ID and device ID values */
  44 #define PCI_VENDOR_ID_PMC                       0x11F8
  45 #define PCI_DEVICE_ID_PMC_MAXRAID               0x5220
  46 
  47 /*
  48  * MAX_CMD          : maximum commands that can be outstanding with IOA
  49  * MAX_IO_CMD       : command blocks available for IO commands
  50  * MAX_HCAM_CMD     : command blocks avaibale for HCAMS
  51  * MAX_INTERNAL_CMD : command blocks avaible for internal commands like reset
  52  */
  53 #define PMCRAID_MAX_CMD                         1024
  54 #define PMCRAID_MAX_IO_CMD                      1020
  55 #define PMCRAID_MAX_HCAM_CMD                    2
  56 #define PMCRAID_MAX_INTERNAL_CMD                2
  57 
  58 /* MAX_IOADLS       : max number of scatter-gather lists supported by IOA
  59  * IOADLS_INTERNAL  : number of ioadls included as part of IOARCB.
  60  * IOADLS_EXTERNAL  : number of ioadls allocated external to IOARCB
  61  */
  62 #define PMCRAID_IOADLS_INTERNAL                  27
  63 #define PMCRAID_IOADLS_EXTERNAL                  37
  64 #define PMCRAID_MAX_IOADLS                       PMCRAID_IOADLS_INTERNAL
  65 
  66 /* HRRQ_ENTRY_SIZE  : size of hrrq buffer
  67  * IOARCB_ALIGNMENT : alignment required for IOARCB
  68  * IOADL_ALIGNMENT  : alignment requirement for IOADLs
  69  * MSIX_VECTORS     : number of MSIX vectors supported
  70  */
  71 #define HRRQ_ENTRY_SIZE                          sizeof(__le32)
  72 #define PMCRAID_IOARCB_ALIGNMENT                 32
  73 #define PMCRAID_IOADL_ALIGNMENT                  16
  74 #define PMCRAID_IOASA_ALIGNMENT                  4
  75 #define PMCRAID_NUM_MSIX_VECTORS                 16
  76 
  77 /* various other limits */
  78 #define PMCRAID_VENDOR_ID_LEN                   8
  79 #define PMCRAID_PRODUCT_ID_LEN                  16
  80 #define PMCRAID_SERIAL_NUM_LEN                  8
  81 #define PMCRAID_LUN_LEN                         8
  82 #define PMCRAID_MAX_CDB_LEN                     16
  83 #define PMCRAID_DEVICE_ID_LEN                   8
  84 #define PMCRAID_SENSE_DATA_LEN                  256
  85 #define PMCRAID_ADD_CMD_PARAM_LEN               48
  86 
  87 #define PMCRAID_MAX_BUS_TO_SCAN                  1
  88 #define PMCRAID_MAX_NUM_TARGETS_PER_BUS          256
  89 #define PMCRAID_MAX_NUM_LUNS_PER_TARGET          8
  90 
  91 /* IOA bus/target/lun number of IOA resources */
  92 #define PMCRAID_IOA_BUS_ID                       0xfe
  93 #define PMCRAID_IOA_TARGET_ID                    0xff
  94 #define PMCRAID_IOA_LUN_ID                       0xff
  95 #define PMCRAID_VSET_BUS_ID                      0x1
  96 #define PMCRAID_VSET_LUN_ID                      0x0
  97 #define PMCRAID_PHYS_BUS_ID                      0x0
  98 #define PMCRAID_VIRTUAL_ENCL_BUS_ID              0x8
  99 #define PMCRAID_MAX_VSET_TARGETS                 0x7F
 100 #define PMCRAID_MAX_VSET_LUNS_PER_TARGET         8
 101 
 102 #define PMCRAID_IOA_MAX_SECTORS                  32767
 103 #define PMCRAID_VSET_MAX_SECTORS                 512
 104 #define PMCRAID_MAX_CMD_PER_LUN                  254
 105 
 106 /* Number of configuration table entries (resources), includes 1 FP,
 107  * 1 Enclosure device
 108  */
 109 #define PMCRAID_MAX_RESOURCES                    256
 110 
 111 /* Adapter Commands used by driver */
 112 #define PMCRAID_QUERY_RESOURCE_STATE             0xC2
 113 #define PMCRAID_RESET_DEVICE                     0xC3
 114 /* options to select reset target */
 115 #define ENABLE_RESET_MODIFIER                    0x80
 116 #define RESET_DEVICE_LUN                         0x40
 117 #define RESET_DEVICE_TARGET                      0x20
 118 #define RESET_DEVICE_BUS                         0x10
 119 
 120 #define PMCRAID_IDENTIFY_HRRQ                    0xC4
 121 #define PMCRAID_QUERY_IOA_CONFIG                 0xC5
 122 #define PMCRAID_QUERY_CMD_STATUS                 0xCB
 123 #define PMCRAID_ABORT_CMD                        0xC7
 124 
 125 /* CANCEL ALL command, provides option for setting SYNC_COMPLETE
 126  * on the target resources for which commands got cancelled
 127  */
 128 #define PMCRAID_CANCEL_ALL_REQUESTS              0xCE
 129 #define PMCRAID_SYNC_COMPLETE_AFTER_CANCEL       PMC_BIT8(0)
 130 
 131 /* HCAM command and types of HCAM supported by IOA */
 132 #define PMCRAID_HOST_CONTROLLED_ASYNC            0xCF
 133 #define PMCRAID_HCAM_CODE_CONFIG_CHANGE          0x01
 134 #define PMCRAID_HCAM_CODE_LOG_DATA               0x02
 135 
 136 /* IOA shutdown command and various shutdown types */
 137 #define PMCRAID_IOA_SHUTDOWN                     0xF7
 138 #define PMCRAID_SHUTDOWN_NORMAL                  0x00
 139 #define PMCRAID_SHUTDOWN_PREPARE_FOR_NORMAL      0x40
 140 #define PMCRAID_SHUTDOWN_NONE                    0x100
 141 #define PMCRAID_SHUTDOWN_ABBREV                  0x80
 142 
 143 /* SET SUPPORTED DEVICES command and the option to select all the
 144  * devices to be supported
 145  */
 146 #define PMCRAID_SET_SUPPORTED_DEVICES            0xFB
 147 #define ALL_DEVICES_SUPPORTED                    PMC_BIT8(0)
 148 
 149 /* This option is used with SCSI WRITE_BUFFER command */
 150 #define PMCRAID_WR_BUF_DOWNLOAD_AND_SAVE         0x05
 151 
 152 /* IOASC Codes used by driver */
 153 #define PMCRAID_IOASC_SENSE_MASK                 0xFFFFFF00
 154 #define PMCRAID_IOASC_SENSE_KEY(ioasc)           ((ioasc) >> 24)
 155 #define PMCRAID_IOASC_SENSE_CODE(ioasc)          (((ioasc) & 0x00ff0000) >> 16)
 156 #define PMCRAID_IOASC_SENSE_QUAL(ioasc)          (((ioasc) & 0x0000ff00) >> 8)
 157 #define PMCRAID_IOASC_SENSE_STATUS(ioasc)        ((ioasc) & 0x000000ff)
 158 
 159 #define PMCRAID_IOASC_GOOD_COMPLETION                   0x00000000
 160 #define PMCRAID_IOASC_GC_IOARCB_NOTFOUND                0x005A0000
 161 #define PMCRAID_IOASC_NR_INIT_CMD_REQUIRED              0x02040200
 162 #define PMCRAID_IOASC_NR_IOA_RESET_REQUIRED             0x02048000
 163 #define PMCRAID_IOASC_NR_SYNC_REQUIRED                  0x023F0000
 164 #define PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC          0x03110C00
 165 #define PMCRAID_IOASC_HW_CANNOT_COMMUNICATE             0x04050000
 166 #define PMCRAID_IOASC_HW_DEVICE_TIMEOUT                 0x04080100
 167 #define PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR        0x04448500
 168 #define PMCRAID_IOASC_HW_IOA_RESET_REQUIRED             0x04448600
 169 #define PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE        0x05250000
 170 #define PMCRAID_IOASC_AC_TERMINATED_BY_HOST             0x0B5A0000
 171 #define PMCRAID_IOASC_UA_BUS_WAS_RESET                  0x06290000
 172 #define PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC            0x06908B00
 173 #define PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER         0x06298000
 174 
 175 /* Driver defined IOASCs */
 176 #define PMCRAID_IOASC_IOA_WAS_RESET                     0x10000001
 177 #define PMCRAID_IOASC_PCI_ACCESS_ERROR                  0x10000002
 178 
 179 /* Various timeout values (in milliseconds) used. If any of these are chip
 180  * specific, move them to pmcraid_chip_details structure.
 181  */
 182 #define PMCRAID_PCI_DEASSERT_TIMEOUT            2000
 183 #define PMCRAID_BIST_TIMEOUT                    2000
 184 #define PMCRAID_AENWAIT_TIMEOUT                 5000
 185 #define PMCRAID_TRANSOP_TIMEOUT                 60000
 186 
 187 #define PMCRAID_RESET_TIMEOUT                   (2 * HZ)
 188 #define PMCRAID_CHECK_FOR_RESET_TIMEOUT         ((HZ / 10))
 189 #define PMCRAID_VSET_IO_TIMEOUT                 (60 * HZ)
 190 #define PMCRAID_INTERNAL_TIMEOUT                (60 * HZ)
 191 #define PMCRAID_SHUTDOWN_TIMEOUT                (150 * HZ)
 192 #define PMCRAID_RESET_BUS_TIMEOUT               (60 * HZ)
 193 #define PMCRAID_RESET_HOST_TIMEOUT              (150 * HZ)
 194 #define PMCRAID_REQUEST_SENSE_TIMEOUT           (30 * HZ)
 195 #define PMCRAID_SET_SUP_DEV_TIMEOUT             (2 * 60 * HZ)
 196 
 197 /* structure to represent a scatter-gather element (IOADL descriptor) */
 198 struct pmcraid_ioadl_desc {
 199         __le64 address;
 200         __le32 data_len;
 201         __u8  reserved[3];
 202         __u8  flags;
 203 } __attribute__((packed, aligned(PMCRAID_IOADL_ALIGNMENT)));
 204 
 205 /* pmcraid_ioadl_desc.flags values */
 206 #define IOADL_FLAGS_CHAINED      PMC_BIT8(0)
 207 #define IOADL_FLAGS_LAST_DESC    PMC_BIT8(1)
 208 #define IOADL_FLAGS_READ_LAST    PMC_BIT8(1)
 209 #define IOADL_FLAGS_WRITE_LAST   PMC_BIT8(1)
 210 
 211 
 212 /* additional IOARCB data which can be CDB or additional request parameters
 213  * or list of IOADLs. Firmware supports max of 512 bytes for IOARCB, hence then
 214  * number of IOADLs are limted to 27. In case they are more than 27, they will
 215  * be used in chained form
 216  */
 217 struct pmcraid_ioarcb_add_data {
 218         union {
 219                 struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_INTERNAL];
 220                 __u8 add_cmd_params[PMCRAID_ADD_CMD_PARAM_LEN];
 221         } u;
 222 };
 223 
 224 /*
 225  * IOA Request Control Block
 226  */
 227 struct pmcraid_ioarcb {
 228         __le64 ioarcb_bus_addr;
 229         __le32 resource_handle;
 230         __le32 response_handle;
 231         __le64 ioadl_bus_addr;
 232         __le32 ioadl_length;
 233         __le32 data_transfer_length;
 234         __le64 ioasa_bus_addr;
 235         __le16 ioasa_len;
 236         __le16 cmd_timeout;
 237         __le16 add_cmd_param_offset;
 238         __le16 add_cmd_param_length;
 239         __le32 reserved1[2];
 240         __le32 reserved2;
 241         __u8  request_type;
 242         __u8  request_flags0;
 243         __u8  request_flags1;
 244         __u8  hrrq_id;
 245         __u8  cdb[PMCRAID_MAX_CDB_LEN];
 246         struct pmcraid_ioarcb_add_data add_data;
 247 } __attribute__((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
 248 
 249 /* well known resource handle values */
 250 #define PMCRAID_IOA_RES_HANDLE        0xffffffff
 251 #define PMCRAID_INVALID_RES_HANDLE    0
 252 
 253 /* pmcraid_ioarcb.request_type values */
 254 #define REQ_TYPE_SCSI                 0x00
 255 #define REQ_TYPE_IOACMD               0x01
 256 #define REQ_TYPE_HCAM                 0x02
 257 
 258 /* pmcraid_ioarcb.flags0 values */
 259 #define TRANSFER_DIR_WRITE            PMC_BIT8(0)
 260 #define INHIBIT_UL_CHECK              PMC_BIT8(2)
 261 #define SYNC_OVERRIDE                 PMC_BIT8(3)
 262 #define SYNC_COMPLETE                 PMC_BIT8(4)
 263 #define NO_LINK_DESCS                 PMC_BIT8(5)
 264 
 265 /* pmcraid_ioarcb.flags1 values */
 266 #define DELAY_AFTER_RESET             PMC_BIT8(0)
 267 #define TASK_TAG_SIMPLE               0x10
 268 #define TASK_TAG_ORDERED              0x20
 269 #define TASK_TAG_QUEUE_HEAD           0x30
 270 
 271 /* toggle bit offset in response handle */
 272 #define HRRQ_TOGGLE_BIT               0x01
 273 #define HRRQ_RESPONSE_BIT             0x02
 274 
 275 /* IOA Status Area */
 276 struct pmcraid_ioasa_vset {
 277         __le32 failing_lba_hi;
 278         __le32 failing_lba_lo;
 279         __le32 reserved;
 280 } __attribute__((packed, aligned(4)));
 281 
 282 struct pmcraid_ioasa {
 283         __le32 ioasc;
 284         __le16 returned_status_length;
 285         __le16 available_status_length;
 286         __le32 residual_data_length;
 287         __le32 ilid;
 288         __le32 fd_ioasc;
 289         __le32 fd_res_address;
 290         __le32 fd_res_handle;
 291         __le32 reserved;
 292 
 293         /* resource specific sense information */
 294         union {
 295                 struct pmcraid_ioasa_vset vset;
 296         } u;
 297 
 298         /* IOA autosense data */
 299         __le16 auto_sense_length;
 300         __le16 error_data_length;
 301         __u8  sense_data[PMCRAID_SENSE_DATA_LEN];
 302 } __attribute__((packed, aligned(4)));
 303 
 304 #define PMCRAID_DRIVER_ILID           0xffffffff
 305 
 306 /* Config Table Entry per Resource */
 307 struct pmcraid_config_table_entry {
 308         __u8  resource_type;
 309         __u8  bus_protocol;
 310         __le16 array_id;
 311         __u8  common_flags0;
 312         __u8  common_flags1;
 313         __u8  unique_flags0;
 314         __u8  unique_flags1;    /*also used as vset target_id */
 315         __le32 resource_handle;
 316         __le32 resource_address;
 317         __u8  device_id[PMCRAID_DEVICE_ID_LEN];
 318         __u8  lun[PMCRAID_LUN_LEN];
 319 } __attribute__((packed, aligned(4)));
 320 
 321 /* extended configuration table sizes are also of 32 bytes in size */
 322 struct pmcraid_config_table_entry_ext {
 323         struct pmcraid_config_table_entry cfgte;
 324 };
 325 
 326 /* resource types (config_table_entry.resource_type values) */
 327 #define RES_TYPE_AF_DASD     0x00
 328 #define RES_TYPE_GSCSI       0x01
 329 #define RES_TYPE_VSET        0x02
 330 #define RES_TYPE_IOA_FP      0xFF
 331 
 332 #define RES_IS_IOA(res)      ((res).resource_type == RES_TYPE_IOA_FP)
 333 #define RES_IS_GSCSI(res)    ((res).resource_type == RES_TYPE_GSCSI)
 334 #define RES_IS_VSET(res)     ((res).resource_type == RES_TYPE_VSET)
 335 #define RES_IS_AFDASD(res)   ((res).resource_type == RES_TYPE_AF_DASD)
 336 
 337 /* bus_protocol values used by driver */
 338 #define RES_TYPE_VENCLOSURE  0x8
 339 
 340 /* config_table_entry.common_flags0 */
 341 #define MULTIPATH_RESOURCE   PMC_BIT32(0)
 342 
 343 /* unique_flags1 */
 344 #define IMPORT_MODE_MANUAL   PMC_BIT8(0)
 345 
 346 /* well known resource handle values */
 347 #define RES_HANDLE_IOA       0xFFFFFFFF
 348 #define RES_HANDLE_NONE      0x00000000
 349 
 350 /* well known resource address values */
 351 #define RES_ADDRESS_IOAFP    0xFEFFFFFF
 352 #define RES_ADDRESS_INVALID  0xFFFFFFFF
 353 
 354 /* BUS/TARGET/LUN values from resource_addrr */
 355 #define RES_BUS(res_addr)    (le32_to_cpu(res_addr) & 0xFF)
 356 #define RES_TARGET(res_addr) ((le32_to_cpu(res_addr) >> 16) & 0xFF)
 357 #define RES_LUN(res_addr)    0x0
 358 
 359 /* configuration table structure */
 360 struct pmcraid_config_table {
 361         __le16 num_entries;
 362         __u8  table_format;
 363         __u8  reserved1;
 364         __u8  flags;
 365         __u8  reserved2[11];
 366         union {
 367                 struct pmcraid_config_table_entry
 368                                 entries[PMCRAID_MAX_RESOURCES];
 369                 struct pmcraid_config_table_entry_ext
 370                                 entries_ext[PMCRAID_MAX_RESOURCES];
 371         };
 372 } __attribute__((packed, aligned(4)));
 373 
 374 /* config_table.flags value */
 375 #define MICROCODE_UPDATE_REQUIRED               PMC_BIT32(0)
 376 
 377 /*
 378  * HCAM format
 379  */
 380 #define PMCRAID_HOSTRCB_LDNSIZE                 4056
 381 
 382 /* Error log notification format */
 383 struct pmcraid_hostrcb_error {
 384         __le32 fd_ioasc;
 385         __le32 fd_ra;
 386         __le32 fd_rh;
 387         __le32 prc;
 388         union {
 389                 __u8 data[PMCRAID_HOSTRCB_LDNSIZE];
 390         } u;
 391 } __attribute__ ((packed, aligned(4)));
 392 
 393 struct pmcraid_hcam_hdr {
 394         __u8  op_code;
 395         __u8  notification_type;
 396         __u8  notification_lost;
 397         __u8  flags;
 398         __u8  overlay_id;
 399         __u8  reserved1[3];
 400         __le32 ilid;
 401         __le32 timestamp1;
 402         __le32 timestamp2;
 403         __le32 data_len;
 404 } __attribute__((packed, aligned(4)));
 405 
 406 #define PMCRAID_AEN_GROUP       0x3
 407 
 408 struct pmcraid_hcam_ccn {
 409         struct pmcraid_hcam_hdr header;
 410         struct pmcraid_config_table_entry cfg_entry;
 411         struct pmcraid_config_table_entry cfg_entry_old;
 412 } __attribute__((packed, aligned(4)));
 413 
 414 #define PMCRAID_CCN_EXT_SIZE    3944
 415 struct pmcraid_hcam_ccn_ext {
 416         struct pmcraid_hcam_hdr header;
 417         struct pmcraid_config_table_entry_ext cfg_entry;
 418         struct pmcraid_config_table_entry_ext cfg_entry_old;
 419         __u8   reserved[PMCRAID_CCN_EXT_SIZE];
 420 } __attribute__((packed, aligned(4)));
 421 
 422 struct pmcraid_hcam_ldn {
 423         struct pmcraid_hcam_hdr header;
 424         struct pmcraid_hostrcb_error error_log;
 425 } __attribute__((packed, aligned(4)));
 426 
 427 /* pmcraid_hcam.op_code values */
 428 #define HOSTRCB_TYPE_CCN                        0xE1
 429 #define HOSTRCB_TYPE_LDN                        0xE2
 430 
 431 /* pmcraid_hcam.notification_type values */
 432 #define NOTIFICATION_TYPE_ENTRY_CHANGED         0x0
 433 #define NOTIFICATION_TYPE_ENTRY_NEW             0x1
 434 #define NOTIFICATION_TYPE_ENTRY_DELETED         0x2
 435 #define NOTIFICATION_TYPE_STATE_CHANGE          0x3
 436 #define NOTIFICATION_TYPE_ENTRY_STATECHANGED    0x4
 437 #define NOTIFICATION_TYPE_ERROR_LOG             0x10
 438 #define NOTIFICATION_TYPE_INFORMATION_LOG       0x11
 439 
 440 #define HOSTRCB_NOTIFICATIONS_LOST              PMC_BIT8(0)
 441 
 442 /* pmcraid_hcam.flags values */
 443 #define HOSTRCB_INTERNAL_OP_ERROR               PMC_BIT8(0)
 444 #define HOSTRCB_ERROR_RESPONSE_SENT             PMC_BIT8(1)
 445 
 446 /* pmcraid_hcam.overlay_id values */
 447 #define HOSTRCB_OVERLAY_ID_08                   0x08
 448 #define HOSTRCB_OVERLAY_ID_09                   0x09
 449 #define HOSTRCB_OVERLAY_ID_11                   0x11
 450 #define HOSTRCB_OVERLAY_ID_12                   0x12
 451 #define HOSTRCB_OVERLAY_ID_13                   0x13
 452 #define HOSTRCB_OVERLAY_ID_14                   0x14
 453 #define HOSTRCB_OVERLAY_ID_16                   0x16
 454 #define HOSTRCB_OVERLAY_ID_17                   0x17
 455 #define HOSTRCB_OVERLAY_ID_20                   0x20
 456 #define HOSTRCB_OVERLAY_ID_FF                   0xFF
 457 
 458 /* Implementation specific card details */
 459 struct pmcraid_chip_details {
 460         /* hardware register offsets */
 461         unsigned long  ioastatus;
 462         unsigned long  ioarrin;
 463         unsigned long  mailbox;
 464         unsigned long  global_intr_mask;
 465         unsigned long  ioa_host_intr;
 466         unsigned long  ioa_host_msix_intr;
 467         unsigned long  ioa_host_intr_clr;
 468         unsigned long  ioa_host_mask;
 469         unsigned long  ioa_host_mask_clr;
 470         unsigned long  host_ioa_intr;
 471         unsigned long  host_ioa_intr_clr;
 472 
 473         /* timeout used during transitional to operational state */
 474         unsigned long transop_timeout;
 475 };
 476 
 477 /* IOA to HOST doorbells (interrupts) */
 478 #define INTRS_TRANSITION_TO_OPERATIONAL         PMC_BIT32(0)
 479 #define INTRS_IOARCB_TRANSFER_FAILED            PMC_BIT32(3)
 480 #define INTRS_IOA_UNIT_CHECK                    PMC_BIT32(4)
 481 #define INTRS_NO_HRRQ_FOR_CMD_RESPONSE          PMC_BIT32(5)
 482 #define INTRS_CRITICAL_OP_IN_PROGRESS           PMC_BIT32(6)
 483 #define INTRS_IO_DEBUG_ACK                      PMC_BIT32(7)
 484 #define INTRS_IOARRIN_LOST                      PMC_BIT32(27)
 485 #define INTRS_SYSTEM_BUS_MMIO_ERROR             PMC_BIT32(28)
 486 #define INTRS_IOA_PROCESSOR_ERROR               PMC_BIT32(29)
 487 #define INTRS_HRRQ_VALID                        PMC_BIT32(30)
 488 #define INTRS_OPERATIONAL_STATUS                PMC_BIT32(0)
 489 #define INTRS_ALLOW_MSIX_VECTOR0                PMC_BIT32(31)
 490 
 491 /* Host to IOA Doorbells */
 492 #define DOORBELL_RUNTIME_RESET                  PMC_BIT32(1)
 493 #define DOORBELL_IOA_RESET_ALERT                PMC_BIT32(7)
 494 #define DOORBELL_IOA_DEBUG_ALERT                PMC_BIT32(9)
 495 #define DOORBELL_ENABLE_DESTRUCTIVE_DIAGS       PMC_BIT32(8)
 496 #define DOORBELL_IOA_START_BIST                 PMC_BIT32(23)
 497 #define DOORBELL_INTR_MODE_MSIX                 PMC_BIT32(25)
 498 #define DOORBELL_INTR_MSIX_CLR                  PMC_BIT32(26)
 499 #define DOORBELL_RESET_IOA                      PMC_BIT32(31)
 500 
 501 /* Global interrupt mask register value */
 502 #define GLOBAL_INTERRUPT_MASK                   0x5ULL
 503 
 504 #define PMCRAID_ERROR_INTERRUPTS        (INTRS_IOARCB_TRANSFER_FAILED | \
 505                                          INTRS_IOA_UNIT_CHECK | \
 506                                          INTRS_NO_HRRQ_FOR_CMD_RESPONSE | \
 507                                          INTRS_IOARRIN_LOST | \
 508                                          INTRS_SYSTEM_BUS_MMIO_ERROR | \
 509                                          INTRS_IOA_PROCESSOR_ERROR)
 510 
 511 #define PMCRAID_PCI_INTERRUPTS          (PMCRAID_ERROR_INTERRUPTS | \
 512                                          INTRS_HRRQ_VALID | \
 513                                          INTRS_TRANSITION_TO_OPERATIONAL |\
 514                                          INTRS_ALLOW_MSIX_VECTOR0)
 515 
 516 /* control_block, associated with each of the commands contains IOARCB, IOADLs
 517  * memory for IOASA. Additional 3 * 16 bytes are allocated in order to support
 518  * additional request parameters (of max size 48) any command.
 519  */
 520 struct pmcraid_control_block {
 521         struct pmcraid_ioarcb ioarcb;
 522         struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_EXTERNAL + 3];
 523         struct pmcraid_ioasa ioasa;
 524 } __attribute__ ((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
 525 
 526 /* pmcraid_sglist - Scatter-gather list allocated for passthrough ioctls
 527  */
 528 struct pmcraid_sglist {
 529         u32 order;
 530         u32 num_sg;
 531         u32 num_dma_sg;
 532         struct scatterlist *scatterlist;
 533 };
 534 
 535 /* page D0 inquiry data of focal point resource */
 536 struct pmcraid_inquiry_data {
 537         __u8    ph_dev_type;
 538         __u8    page_code;
 539         __u8    reserved1;
 540         __u8    add_page_len;
 541         __u8    length;
 542         __u8    reserved2;
 543         __be16  fw_version;
 544         __u8    reserved3[16];
 545 };
 546 
 547 #define PMCRAID_TIMESTAMP_LEN           12
 548 #define PMCRAID_REQ_TM_STR_LEN          6
 549 #define PMCRAID_SCSI_SET_TIMESTAMP      0xA4
 550 #define PMCRAID_SCSI_SERVICE_ACTION     0x0F
 551 
 552 struct pmcraid_timestamp_data {
 553         __u8 reserved1[4];
 554         __u8 timestamp[PMCRAID_REQ_TM_STR_LEN];         /* current time value */
 555         __u8 reserved2[2];
 556 };
 557 
 558 /* pmcraid_cmd - LLD representation of SCSI command */
 559 struct pmcraid_cmd {
 560 
 561         /* Ptr and bus address of DMA.able control block for this command */
 562         struct pmcraid_control_block *ioa_cb;
 563         dma_addr_t ioa_cb_bus_addr;
 564         dma_addr_t dma_handle;
 565 
 566         /* pointer to mid layer structure of SCSI commands */
 567         struct scsi_cmnd *scsi_cmd;
 568 
 569         struct list_head free_list;
 570         struct completion wait_for_completion;
 571         struct timer_list timer;        /* needed for internal commands */
 572         u32 timeout;                    /* current timeout value */
 573         u32 index;                      /* index into the command list */
 574         u8 completion_req;              /* for handling internal commands */
 575         u8 release;                     /* for handling completions */
 576 
 577         void (*cmd_done) (struct pmcraid_cmd *);
 578         struct pmcraid_instance *drv_inst;
 579 
 580         struct pmcraid_sglist *sglist; /* used for passthrough IOCTLs */
 581 
 582         /* scratch used */
 583         union {
 584                 /* during reset sequence */
 585                 unsigned long time_left;
 586                 struct pmcraid_resource_entry *res;
 587                 int hrrq_index;
 588 
 589                 /* used during IO command error handling. Sense buffer
 590                  * for REQUEST SENSE command if firmware is not sending
 591                  * auto sense data
 592                  */
 593                 struct  {
 594                         u8 *sense_buffer;
 595                         dma_addr_t sense_buffer_dma;
 596                 };
 597         };
 598 };
 599 
 600 /*
 601  * Interrupt registers of IOA
 602  */
 603 struct pmcraid_interrupts {
 604         void __iomem *ioa_host_interrupt_reg;
 605         void __iomem *ioa_host_msix_interrupt_reg;
 606         void __iomem *ioa_host_interrupt_clr_reg;
 607         void __iomem *ioa_host_interrupt_mask_reg;
 608         void __iomem *ioa_host_interrupt_mask_clr_reg;
 609         void __iomem *global_interrupt_mask_reg;
 610         void __iomem *host_ioa_interrupt_reg;
 611         void __iomem *host_ioa_interrupt_clr_reg;
 612 };
 613 
 614 /* ISR parameters LLD allocates (one for each MSI-X if enabled) vectors */
 615 struct pmcraid_isr_param {
 616         struct pmcraid_instance *drv_inst;
 617         u8 hrrq_id;                     /* hrrq entry index */
 618 };
 619 
 620 
 621 /* AEN message header sent as part of event data to applications */
 622 struct pmcraid_aen_msg {
 623         u32 hostno;
 624         u32 length;
 625         u8  reserved[8];
 626         u8  data[0];
 627 };
 628 
 629 /* Controller state event message type */
 630 struct pmcraid_state_msg {
 631         struct pmcraid_aen_msg msg;
 632         u32 ioa_state;
 633 };
 634 
 635 #define PMC_DEVICE_EVENT_RESET_START            0x11000000
 636 #define PMC_DEVICE_EVENT_RESET_SUCCESS          0x11000001
 637 #define PMC_DEVICE_EVENT_RESET_FAILED           0x11000002
 638 #define PMC_DEVICE_EVENT_SHUTDOWN_START         0x11000003
 639 #define PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS       0x11000004
 640 #define PMC_DEVICE_EVENT_SHUTDOWN_FAILED        0x11000005
 641 
 642 struct pmcraid_hostrcb {
 643         struct pmcraid_instance *drv_inst;
 644         struct pmcraid_aen_msg *msg;
 645         struct pmcraid_hcam_hdr *hcam;  /* pointer to hcam buffer */
 646         struct pmcraid_cmd  *cmd;       /* pointer to command block used */
 647         dma_addr_t baddr;               /* system address of hcam buffer */
 648         atomic_t ignore;                /* process HCAM response ? */
 649 };
 650 
 651 #define PMCRAID_AEN_HDR_SIZE    sizeof(struct pmcraid_aen_msg)
 652 
 653 
 654 
 655 /*
 656  * Per adapter structure maintained by LLD
 657  */
 658 struct pmcraid_instance {
 659         /* Array of allowed-to-be-exposed resources, initialized from
 660          * Configutation Table, later updated with CCNs
 661          */
 662         struct pmcraid_resource_entry *res_entries;
 663 
 664         struct list_head free_res_q;    /* res_entries lists for easy lookup */
 665         struct list_head used_res_q;    /* List of to be exposed resources */
 666         spinlock_t resource_lock;       /* spinlock to protect resource list */
 667 
 668         void __iomem *mapped_dma_addr;
 669         void __iomem *ioa_status;       /* Iomapped IOA status register */
 670         void __iomem *mailbox;          /* Iomapped mailbox register */
 671         void __iomem *ioarrin;          /* IOmapped IOARR IN register */
 672 
 673         struct pmcraid_interrupts int_regs;
 674         struct pmcraid_chip_details *chip_cfg;
 675 
 676         /* HostRCBs needed for HCAM */
 677         struct pmcraid_hostrcb ldn;
 678         struct pmcraid_hostrcb ccn;
 679         struct pmcraid_state_msg scn;   /* controller state change msg */
 680 
 681 
 682         /* Bus address of start of HRRQ */
 683         dma_addr_t hrrq_start_bus_addr[PMCRAID_NUM_MSIX_VECTORS];
 684 
 685         /* Pointer to 1st entry of HRRQ */
 686         __le32 *hrrq_start[PMCRAID_NUM_MSIX_VECTORS];
 687 
 688         /* Pointer to last entry of HRRQ */
 689         __le32 *hrrq_end[PMCRAID_NUM_MSIX_VECTORS];
 690 
 691         /* Pointer to current pointer of hrrq */
 692         __le32 *hrrq_curr[PMCRAID_NUM_MSIX_VECTORS];
 693 
 694         /* Lock for HRRQ access */
 695         spinlock_t hrrq_lock[PMCRAID_NUM_MSIX_VECTORS];
 696 
 697         struct pmcraid_inquiry_data *inq_data;
 698         dma_addr_t  inq_data_baddr;
 699 
 700         struct pmcraid_timestamp_data *timestamp_data;
 701         dma_addr_t  timestamp_data_baddr;
 702 
 703         /* size of configuration table entry, varies based on the firmware */
 704         u32     config_table_entry_size;
 705 
 706         /* Expected toggle bit at host */
 707         u8 host_toggle_bit[PMCRAID_NUM_MSIX_VECTORS];
 708 
 709 
 710         /* Wait Q for  threads to wait for Reset IOA completion */
 711         wait_queue_head_t reset_wait_q;
 712         struct pmcraid_cmd *reset_cmd;
 713 
 714         /* structures for supporting SIGIO based AEN. */
 715         struct fasync_struct *aen_queue;
 716         struct mutex aen_queue_lock;    /* lock for aen subscribers list */
 717         struct cdev cdev;
 718 
 719         struct Scsi_Host *host; /* mid layer interface structure handle */
 720         struct pci_dev *pdev;   /* PCI device structure handle */
 721 
 722         /* No of Reset IOA retries . IOA marked dead if threshold exceeds */
 723         u8 ioa_reset_attempts;
 724 #define PMCRAID_RESET_ATTEMPTS 3
 725 
 726         u8  current_log_level;  /* default level for logging IOASC errors */
 727 
 728         u8  num_hrrq;           /* Number of interrupt vectors allocated */
 729         u8  interrupt_mode;     /* current interrupt mode legacy or msix */
 730         dev_t dev;              /* Major-Minor numbers for Char device */
 731 
 732         /* Used as ISR handler argument */
 733         struct pmcraid_isr_param hrrq_vector[PMCRAID_NUM_MSIX_VECTORS];
 734 
 735         /* Message id as filled in last fired IOARCB, used to identify HRRQ */
 736         atomic_t last_message_id;
 737 
 738         /* configuration table */
 739         struct pmcraid_config_table *cfg_table;
 740         dma_addr_t cfg_table_bus_addr;
 741 
 742         /* structures related to command blocks */
 743         struct kmem_cache *cmd_cachep;          /* cache for cmd blocks */
 744         struct dma_pool *control_pool;          /* pool for control blocks */
 745         char   cmd_pool_name[64];               /* name of cmd cache */
 746         char   ctl_pool_name[64];               /* name of control cache */
 747 
 748         struct pmcraid_cmd *cmd_list[PMCRAID_MAX_CMD];
 749 
 750         struct list_head free_cmd_pool;
 751         struct list_head pending_cmd_pool;
 752         spinlock_t free_pool_lock;              /* free pool lock */
 753         spinlock_t pending_pool_lock;           /* pending pool lock */
 754 
 755         /* Tasklet to handle deferred processing */
 756         struct tasklet_struct isr_tasklet[PMCRAID_NUM_MSIX_VECTORS];
 757 
 758         /* Work-queue (Shared) for deferred reset processing */
 759         struct work_struct worker_q;
 760 
 761         /* No of IO commands pending with FW */
 762         atomic_t outstanding_cmds;
 763 
 764         /* should add/delete resources to mid-layer now ?*/
 765         atomic_t expose_resources;
 766 
 767 
 768 
 769         u32 ioa_state:4;        /* For IOA Reset sequence FSM */
 770 #define IOA_STATE_OPERATIONAL       0x0
 771 #define IOA_STATE_UNKNOWN           0x1
 772 #define IOA_STATE_DEAD              0x2
 773 #define IOA_STATE_IN_SOFT_RESET     0x3
 774 #define IOA_STATE_IN_HARD_RESET     0x4
 775 #define IOA_STATE_IN_RESET_ALERT    0x5
 776 #define IOA_STATE_IN_BRINGDOWN      0x6
 777 #define IOA_STATE_IN_BRINGUP        0x7
 778 
 779         u32 ioa_reset_in_progress:1; /* true if IOA reset is in progress */
 780         u32 ioa_hard_reset:1;   /* TRUE if Hard Reset is needed */
 781         u32 ioa_unit_check:1;   /* Indicates Unit Check condition */
 782         u32 ioa_bringdown:1;    /* whether IOA needs to be brought down */
 783         u32 force_ioa_reset:1;  /* force adapter reset ? */
 784         u32 reinit_cfg_table:1; /* reinit config table due to lost CCN */
 785         u32 ioa_shutdown_type:2;/* shutdown type used during reset */
 786 #define SHUTDOWN_NONE               0x0
 787 #define SHUTDOWN_NORMAL             0x1
 788 #define SHUTDOWN_ABBREV             0x2
 789         u32 timestamp_error:1; /* indicate set timestamp for out of sync */
 790 
 791 };
 792 
 793 /* LLD maintained resource entry structure */
 794 struct pmcraid_resource_entry {
 795         struct list_head queue; /* link to "to be exposed" resources */
 796         union {
 797                 struct pmcraid_config_table_entry cfg_entry;
 798                 struct pmcraid_config_table_entry_ext cfg_entry_ext;
 799         };
 800         struct scsi_device *scsi_dev;   /* Link scsi_device structure */
 801         atomic_t read_failures;         /* count of failed READ commands */
 802         atomic_t write_failures;        /* count of failed WRITE commands */
 803 
 804         /* To indicate add/delete/modify during CCN */
 805         u8 change_detected;
 806 #define RES_CHANGE_ADD          0x1     /* add this to mid-layer */
 807 #define RES_CHANGE_DEL          0x2     /* remove this from mid-layer */
 808 
 809         u8 reset_progress;      /* Device is resetting */
 810 
 811         /*
 812          * When IOA asks for sync (i.e. IOASC = Not Ready, Sync Required), this
 813          * flag will be set, mid layer will be asked to retry. In the next
 814          * attempt, this flag will be checked in queuecommand() to set
 815          * SYNC_COMPLETE flag in IOARCB (flag_0).
 816          */
 817         u8 sync_reqd;
 818 
 819         /* target indicates the mapped target_id assigned to this resource if
 820          * this is VSET resource. For non-VSET resources this will be un-used
 821          * or zero
 822          */
 823         u8 target;
 824 };
 825 
 826 /* Data structures used in IOASC error code logging */
 827 struct pmcraid_ioasc_error {
 828         u32 ioasc_code;         /* IOASC code */
 829         u8 log_level;           /* default log level assignment. */
 830         char *error_string;
 831 };
 832 
 833 /* Initial log_level assignments for various IOASCs */
 834 #define IOASC_LOG_LEVEL_NONE        0x0 /* no logging */
 835 #define IOASC_LOG_LEVEL_MUST        0x1 /* must log: all high-severity errors */
 836 #define IOASC_LOG_LEVEL_HARD        0x2 /* optional – low severity errors */
 837 
 838 /* Error information maintained by LLD. LLD initializes the pmcraid_error_table
 839  * statically.
 840  */
 841 static struct pmcraid_ioasc_error pmcraid_ioasc_error_table[] = {
 842         {0x01180600, IOASC_LOG_LEVEL_HARD,
 843          "Recovered Error, soft media error, sector reassignment suggested"},
 844         {0x015D0000, IOASC_LOG_LEVEL_HARD,
 845          "Recovered Error, failure prediction threshold exceeded"},
 846         {0x015D9200, IOASC_LOG_LEVEL_HARD,
 847          "Recovered Error, soft Cache Card Battery error threshold"},
 848         {0x015D9200, IOASC_LOG_LEVEL_HARD,
 849          "Recovered Error, soft Cache Card Battery error threshold"},
 850         {0x02048000, IOASC_LOG_LEVEL_HARD,
 851          "Not Ready, IOA Reset Required"},
 852         {0x02408500, IOASC_LOG_LEVEL_HARD,
 853          "Not Ready, IOA microcode download required"},
 854         {0x03110B00, IOASC_LOG_LEVEL_HARD,
 855          "Medium Error, data unreadable, reassignment suggested"},
 856         {0x03110C00, IOASC_LOG_LEVEL_MUST,
 857          "Medium Error, data unreadable do not reassign"},
 858         {0x03310000, IOASC_LOG_LEVEL_HARD,
 859          "Medium Error, media corrupted"},
 860         {0x04050000, IOASC_LOG_LEVEL_HARD,
 861          "Hardware Error, IOA can't communicate with device"},
 862         {0x04080000, IOASC_LOG_LEVEL_MUST,
 863          "Hardware Error, device bus error"},
 864         {0x04088000, IOASC_LOG_LEVEL_MUST,
 865          "Hardware Error, device bus is not functioning"},
 866         {0x04118000, IOASC_LOG_LEVEL_HARD,
 867          "Hardware Error, IOA reserved area data check"},
 868         {0x04118100, IOASC_LOG_LEVEL_HARD,
 869          "Hardware Error, IOA reserved area invalid data pattern"},
 870         {0x04118200, IOASC_LOG_LEVEL_HARD,
 871          "Hardware Error, IOA reserved area LRC error"},
 872         {0x04320000, IOASC_LOG_LEVEL_HARD,
 873          "Hardware Error, reassignment space exhausted"},
 874         {0x04330000, IOASC_LOG_LEVEL_HARD,
 875          "Hardware Error, data transfer underlength error"},
 876         {0x04330000, IOASC_LOG_LEVEL_HARD,
 877          "Hardware Error, data transfer overlength error"},
 878         {0x04418000, IOASC_LOG_LEVEL_MUST,
 879          "Hardware Error, PCI bus error"},
 880         {0x04440000, IOASC_LOG_LEVEL_HARD,
 881          "Hardware Error, device error"},
 882         {0x04448200, IOASC_LOG_LEVEL_MUST,
 883          "Hardware Error, IOA error"},
 884         {0x04448300, IOASC_LOG_LEVEL_HARD,
 885          "Hardware Error, undefined device response"},
 886         {0x04448400, IOASC_LOG_LEVEL_HARD,
 887          "Hardware Error, IOA microcode error"},
 888         {0x04448600, IOASC_LOG_LEVEL_HARD,
 889          "Hardware Error, IOA reset required"},
 890         {0x04449200, IOASC_LOG_LEVEL_HARD,
 891          "Hardware Error, hard Cache Fearuee Card Battery error"},
 892         {0x0444A000, IOASC_LOG_LEVEL_HARD,
 893          "Hardware Error, failed device altered"},
 894         {0x0444A200, IOASC_LOG_LEVEL_HARD,
 895          "Hardware Error, data check after reassignment"},
 896         {0x0444A300, IOASC_LOG_LEVEL_HARD,
 897          "Hardware Error, LRC error after reassignment"},
 898         {0x044A0000, IOASC_LOG_LEVEL_HARD,
 899          "Hardware Error, device bus error (msg/cmd phase)"},
 900         {0x04670400, IOASC_LOG_LEVEL_HARD,
 901          "Hardware Error, new device can't be used"},
 902         {0x04678000, IOASC_LOG_LEVEL_HARD,
 903          "Hardware Error, invalid multiadapter configuration"},
 904         {0x04678100, IOASC_LOG_LEVEL_HARD,
 905          "Hardware Error, incorrect connection between enclosures"},
 906         {0x04678200, IOASC_LOG_LEVEL_HARD,
 907          "Hardware Error, connections exceed IOA design limits"},
 908         {0x04678300, IOASC_LOG_LEVEL_HARD,
 909          "Hardware Error, incorrect multipath connection"},
 910         {0x04679000, IOASC_LOG_LEVEL_HARD,
 911          "Hardware Error, command to LUN failed"},
 912         {0x064C8000, IOASC_LOG_LEVEL_HARD,
 913          "Unit Attention, cache exists for missing/failed device"},
 914         {0x06670100, IOASC_LOG_LEVEL_HARD,
 915          "Unit Attention, incompatible exposed mode device"},
 916         {0x06670600, IOASC_LOG_LEVEL_HARD,
 917          "Unit Attention, attachment of logical unit failed"},
 918         {0x06678000, IOASC_LOG_LEVEL_HARD,
 919          "Unit Attention, cables exceed connective design limit"},
 920         {0x06678300, IOASC_LOG_LEVEL_HARD,
 921          "Unit Attention, incomplete multipath connection between" \
 922          "IOA and enclosure"},
 923         {0x06678400, IOASC_LOG_LEVEL_HARD,
 924          "Unit Attention, incomplete multipath connection between" \
 925          "device and enclosure"},
 926         {0x06678500, IOASC_LOG_LEVEL_HARD,
 927          "Unit Attention, incomplete multipath connection between" \
 928          "IOA and remote IOA"},
 929         {0x06678600, IOASC_LOG_LEVEL_HARD,
 930          "Unit Attention, missing remote IOA"},
 931         {0x06679100, IOASC_LOG_LEVEL_HARD,
 932          "Unit Attention, enclosure doesn't support required multipath" \
 933          "function"},
 934         {0x06698200, IOASC_LOG_LEVEL_HARD,
 935          "Unit Attention, corrupt array parity detected on device"},
 936         {0x066B0200, IOASC_LOG_LEVEL_HARD,
 937          "Unit Attention, array exposed"},
 938         {0x066B8200, IOASC_LOG_LEVEL_HARD,
 939          "Unit Attention, exposed array is still protected"},
 940         {0x066B9200, IOASC_LOG_LEVEL_HARD,
 941          "Unit Attention, Multipath redundancy level got worse"},
 942         {0x07270000, IOASC_LOG_LEVEL_HARD,
 943          "Data Protect, device is read/write protected by IOA"},
 944         {0x07278000, IOASC_LOG_LEVEL_HARD,
 945          "Data Protect, IOA doesn't support device attribute"},
 946         {0x07278100, IOASC_LOG_LEVEL_HARD,
 947          "Data Protect, NVRAM mirroring prohibited"},
 948         {0x07278400, IOASC_LOG_LEVEL_HARD,
 949          "Data Protect, array is short 2 or more devices"},
 950         {0x07278600, IOASC_LOG_LEVEL_HARD,
 951          "Data Protect, exposed array is short a required device"},
 952         {0x07278700, IOASC_LOG_LEVEL_HARD,
 953          "Data Protect, array members not at required addresses"},
 954         {0x07278800, IOASC_LOG_LEVEL_HARD,
 955          "Data Protect, exposed mode device resource address conflict"},
 956         {0x07278900, IOASC_LOG_LEVEL_HARD,
 957          "Data Protect, incorrect resource address of exposed mode device"},
 958         {0x07278A00, IOASC_LOG_LEVEL_HARD,
 959          "Data Protect, Array is missing a device and parity is out of sync"},
 960         {0x07278B00, IOASC_LOG_LEVEL_HARD,
 961          "Data Protect, maximum number of arrays already exist"},
 962         {0x07278C00, IOASC_LOG_LEVEL_HARD,
 963          "Data Protect, cannot locate cache data for device"},
 964         {0x07278D00, IOASC_LOG_LEVEL_HARD,
 965          "Data Protect, cache data exits for a changed device"},
 966         {0x07279100, IOASC_LOG_LEVEL_HARD,
 967          "Data Protect, detection of a device requiring format"},
 968         {0x07279200, IOASC_LOG_LEVEL_HARD,
 969          "Data Protect, IOA exceeds maximum number of devices"},
 970         {0x07279600, IOASC_LOG_LEVEL_HARD,
 971          "Data Protect, missing array, volume set is not functional"},
 972         {0x07279700, IOASC_LOG_LEVEL_HARD,
 973          "Data Protect, single device for a volume set"},
 974         {0x07279800, IOASC_LOG_LEVEL_HARD,
 975          "Data Protect, missing multiple devices for a volume set"},
 976         {0x07279900, IOASC_LOG_LEVEL_HARD,
 977          "Data Protect, maximum number of volument sets already exists"},
 978         {0x07279A00, IOASC_LOG_LEVEL_HARD,
 979          "Data Protect, other volume set problem"},
 980 };
 981 
 982 /* macros to help in debugging */
 983 #define pmcraid_err(...)  \
 984         printk(KERN_ERR "MaxRAID: "__VA_ARGS__)
 985 
 986 #define pmcraid_info(...) \
 987         if (pmcraid_debug_log) \
 988                 printk(KERN_INFO "MaxRAID: "__VA_ARGS__)
 989 
 990 /* check if given command is a SCSI READ or SCSI WRITE command */
 991 #define SCSI_READ_CMD           0x1     /* any of SCSI READ commands */
 992 #define SCSI_WRITE_CMD          0x2     /* any of SCSI WRITE commands */
 993 #define SCSI_CMD_TYPE(opcode) \
 994 ({  u8 op = opcode; u8 __type = 0;\
 995         if (op == READ_6 || op == READ_10 || op == READ_12 || op == READ_16)\
 996                 __type = SCSI_READ_CMD;\
 997         else if (op == WRITE_6 || op == WRITE_10 || op == WRITE_12 || \
 998                  op == WRITE_16)\
 999                 __type = SCSI_WRITE_CMD;\
1000         __type;\
1001 })
1002 
1003 #define IS_SCSI_READ_WRITE(opcode) \
1004 ({      u8 __type = SCSI_CMD_TYPE(opcode); \
1005         (__type == SCSI_READ_CMD || __type == SCSI_WRITE_CMD) ? 1 : 0;\
1006 })
1007 
1008 
1009 /*
1010  * pmcraid_ioctl_header - definition of header structure that precedes all the
1011  * buffers given as ioctl arguments.
1012  *
1013  * .signature           : always ASCII string, "PMCRAID"
1014  * .reserved            : not used
1015  * .buffer_length       : length of the buffer following the header
1016  */
1017 struct pmcraid_ioctl_header {
1018         u8  signature[8];
1019         u32 reserved;
1020         u32 buffer_length;
1021 };
1022 
1023 #define PMCRAID_IOCTL_SIGNATURE      "PMCRAID"
1024 
1025 /*
1026  * pmcraid_passthrough_ioctl_buffer - structure given as argument to
1027  * passthrough(or firmware handled) IOCTL commands. Note that ioarcb requires
1028  * 32-byte alignment so, it is necessary to pack this structure to avoid any
1029  * holes between ioctl_header and passthrough buffer
1030  *
1031  * .ioactl_header : ioctl header
1032  * .ioarcb        : filled-up ioarcb buffer, driver always reads this buffer
1033  * .ioasa         : buffer for ioasa, driver fills this with IOASA from firmware
1034  * .request_buffer: The I/O buffer (flat), driver reads/writes to this based on
1035  *                  the transfer directions passed in ioarcb.flags0. Contents
1036  *                  of this buffer are valid only when ioarcb.data_transfer_len
1037  *                  is not zero.
1038  */
1039 struct pmcraid_passthrough_ioctl_buffer {
1040         struct pmcraid_ioctl_header ioctl_header;
1041         struct pmcraid_ioarcb ioarcb;
1042         struct pmcraid_ioasa  ioasa;
1043         u8  request_buffer[1];
1044 } __attribute__ ((packed));
1045 
1046 /*
1047  * keys to differentiate between driver handled IOCTLs and passthrough
1048  * IOCTLs passed to IOA. driver determines the ioctl type using macro
1049  * _IOC_TYPE
1050  */
1051 #define PMCRAID_DRIVER_IOCTL         'D'
1052 #define PMCRAID_PASSTHROUGH_IOCTL    'F'
1053 
1054 #define DRV_IOCTL(n, size) \
1055         _IOC(_IOC_READ|_IOC_WRITE, PMCRAID_DRIVER_IOCTL, (n), (size))
1056 
1057 #define FMW_IOCTL(n, size) \
1058         _IOC(_IOC_READ|_IOC_WRITE, PMCRAID_PASSTHROUGH_IOCTL,  (n), (size))
1059 
1060 /*
1061  * _ARGSIZE: macro that gives size of the argument type passed to an IOCTL cmd.
1062  * This is to facilitate applications avoiding un-necessary memory allocations.
1063  * For example, most of driver handled ioctls do not require ioarcb, ioasa.
1064  */
1065 #define _ARGSIZE(arg) (sizeof(struct pmcraid_ioctl_header) + sizeof(arg))
1066 
1067 /* Driver handled IOCTL command definitions */
1068 
1069 #define PMCRAID_IOCTL_RESET_ADAPTER          \
1070         DRV_IOCTL(5, sizeof(struct pmcraid_ioctl_header))
1071 
1072 /* passthrough/firmware handled commands */
1073 #define PMCRAID_IOCTL_PASSTHROUGH_COMMAND         \
1074         FMW_IOCTL(1, sizeof(struct pmcraid_passthrough_ioctl_buffer))
1075 
1076 #define PMCRAID_IOCTL_DOWNLOAD_MICROCODE     \
1077         FMW_IOCTL(2, sizeof(struct pmcraid_passthrough_ioctl_buffer))
1078 
1079 
1080 #endif /* _PMCRAID_H */