drivers/scsi/pmcraid.h

   1 /*
   2  * pmcraid.h -- PMC Sierra MaxRAID controller driver header file
   3  *
   4  * Copyright (C) 2008, 2009 PMC Sierra Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #ifndef _PMCRAID_H
  22 #define _PMCRAID_H
  23
  24 #include <linux/version.h>
  25 #include <linux/types.h>
  26 #include <linux/completion.h>
  27 #include <linux/list.h>
  28 #include <scsi/scsi.h>
  29 #include <scsi/scsi_cmnd.h>
  30 #include <linux/cdev.h>
  31 #include <net/netlink.h>
  32 #include <net/genetlink.h>
  33 #include <linux/connector.h>
  34 /*
  35  * Driver name   : string representing the driver name
  36  * Device file   : /dev file to be used for management interfaces
  37  * Driver version: version string in major_version.minor_version.patch format
  38  * Driver date   : date information in "Mon dd yyyy" format
  39  */
  40 #define PMCRAID_DRIVER_NAME             "PMC MaxRAID"
  41 #define PMCRAID_DEVFILE                 "pmcsas"
  42 #define PMCRAID_DRIVER_VERSION          "1.0.2"
  43 #define PMCRAID_DRIVER_DATE             __DATE__
  44
  45 /* Maximum number of adapters supported by current version of the driver */
  46 #define PMCRAID_MAX_ADAPTERS            1024
  47
  48 /* Bit definitions as per firmware, bit position [0][1][2].....[31] */
  49 #define PMC_BIT8(n)          (1 << (7-n))
  50 #define PMC_BIT16(n)         (1 << (15-n))
  51 #define PMC_BIT32(n)         (1 << (31-n))
  52
  53 /* PMC PCI vendor ID and device ID values */
  54 #define PCI_VENDOR_ID_PMC                       0x11F8
  55 #define PCI_DEVICE_ID_PMC_MAXRAID               0x5220
  56
  57 /*
  58  * MAX_CMD          : maximum commands that can be outstanding with IOA
  59  * MAX_IO_CMD       : command blocks available for IO commands
  60  * MAX_HCAM_CMD     : command blocks avaibale for HCAMS
  61  * MAX_INTERNAL_CMD : command blocks avaible for internal commands like reset
  62  */
  63 #define PMCRAID_MAX_CMD                         1024
  64 #define PMCRAID_MAX_IO_CMD                      1020
  65 #define PMCRAID_MAX_HCAM_CMD                    2
  66 #define PMCRAID_MAX_INTERNAL_CMD                2
  67
  68 /* MAX_IOADLS       : max number of scatter-gather lists supported by IOA
  69  * IOADLS_INTERNAL  : number of ioadls included as part of IOARCB.
  70  * IOADLS_EXTERNAL  : number of ioadls allocated external to IOARCB
  71  */
  72 #define PMCRAID_IOADLS_INTERNAL                  27
  73 #define PMCRAID_IOADLS_EXTERNAL                  37
  74 #define PMCRAID_MAX_IOADLS                       PMCRAID_IOADLS_INTERNAL
  75
  76 /* HRRQ_ENTRY_SIZE  : size of hrrq buffer
  77  * IOARCB_ALIGNMENT : alignment required for IOARCB
  78  * IOADL_ALIGNMENT  : alignment requirement for IOADLs
  79  * MSIX_VECTORS     : number of MSIX vectors supported
  80  */
  81 #define HRRQ_ENTRY_SIZE                          sizeof(__le32)
  82 #define PMCRAID_IOARCB_ALIGNMENT                 32
  83 #define PMCRAID_IOADL_ALIGNMENT                  16
  84 #define PMCRAID_IOASA_ALIGNMENT                  4
  85 #define PMCRAID_NUM_MSIX_VECTORS                 1
  86
  87 /* various other limits */
  88 #define PMCRAID_VENDOR_ID_LEN                    8
  89 #define PMCRAID_PRODUCT_ID_LEN                   16
  90 #define PMCRAID_SERIAL_NUM_LEN                   8
  91 #define PMCRAID_LUN_LEN                          8
  92 #define PMCRAID_MAX_CDB_LEN                      16
  93 #define PMCRAID_DEVICE_ID_LEN                    8
  94 #define PMCRAID_SENSE_DATA_LEN                   256
  95 #define PMCRAID_ADD_CMD_PARAM_LEN                48
  96
  97 #define PMCRAID_MAX_BUS_TO_SCAN                  1
  98 #define PMCRAID_MAX_NUM_TARGETS_PER_BUS          256
  99 #define PMCRAID_MAX_NUM_LUNS_PER_TARGET          8
 100
 101 /* IOA bus/target/lun number of IOA resources */
 102 #define PMCRAID_IOA_BUS_ID                       0xfe
 103 #define PMCRAID_IOA_TARGET_ID                    0xff
 104 #define PMCRAID_IOA_LUN_ID                       0xff
 105 #define PMCRAID_VSET_BUS_ID                      0x1
 106 #define PMCRAID_VSET_LUN_ID                      0x0
 107 #define PMCRAID_PHYS_BUS_ID                      0x0
 108 #define PMCRAID_VIRTUAL_ENCL_BUS_ID              0x8
 109 #define PMCRAID_MAX_VSET_TARGETS                 240
 110 #define PMCRAID_MAX_VSET_LUNS_PER_TARGET         8
 111
 112 #define PMCRAID_IOA_MAX_SECTORS                  32767
 113 #define PMCRAID_VSET_MAX_SECTORS                 512
 114 #define PMCRAID_MAX_CMD_PER_LUN                  254
 115
 116 /* Number of configuration table entries (resources) */
 117 #define PMCRAID_MAX_NUM_OF_VSETS                 240
 118
 119 /* Todo : Check max limit for Phase 1 */
 120 #define PMCRAID_MAX_NUM_OF_PHY_DEVS              256
 121
 122 /* MAX_NUM_OF_DEVS includes 1 FP, 1 Dummy Enclosure device */
 123 #define PMCRAID_MAX_NUM_OF_DEVS                        \
 124     (PMCRAID_MAX_NUM_OF_VSETS + PMCRAID_MAX_NUM_OF_PHY_DEVS + 2)
 125
 126 #define PMCRAID_MAX_RESOURCES                    PMCRAID_MAX_NUM_OF_DEVS
 127
 128 /* Adapter Commands used by driver */
 129 #define PMCRAID_QUERY_RESOURCE_STATE             0xC2
 130 #define PMCRAID_RESET_DEVICE                     0xC3
 131 /* options to select reset target */
 132 #define ENABLE_RESET_MODIFIER                    0x80
 133 #define RESET_DEVICE_LUN                         0x40
 134 #define RESET_DEVICE_TARGET                      0x20
 135 #define RESET_DEVICE_BUS                         0x10
 136
 137 #define PMCRAID_IDENTIFY_HRRQ                    0xC4
 138 #define PMCRAID_QUERY_IOA_CONFIG                 0xC5
 139 #define PMCRAID_QUERY_CMD_STATUS                 0xCB
 140 #define PMCRAID_ABORT_CMD                        0xC7
 141
 142 /* CANCEL ALL command, provides option for setting SYNC_COMPLETE
 143  * on the target resources for which commands got cancelled
 144  */
 145 #define PMCRAID_CANCEL_ALL_REQUESTS              0xCE
 146 #define PMCRAID_SYNC_COMPLETE_AFTER_CANCEL       PMC_BIT8(0)
 147
 148 /* HCAM command and types of HCAM supported by IOA */
 149 #define PMCRAID_HOST_CONTROLLED_ASYNC            0xCF
 150 #define PMCRAID_HCAM_CODE_CONFIG_CHANGE          0x01
 151 #define PMCRAID_HCAM_CODE_LOG_DATA               0x02
 152
 153 /* IOA shutdown command and various shutdown types */
 154 #define PMCRAID_IOA_SHUTDOWN                     0xF7
 155 #define PMCRAID_SHUTDOWN_NORMAL                  0x00
 156 #define PMCRAID_SHUTDOWN_PREPARE_FOR_NORMAL      0x40
 157 #define PMCRAID_SHUTDOWN_NONE                    0x100
 158 #define PMCRAID_SHUTDOWN_ABBREV                  0x80
 159
 160 /* SET SUPPORTED DEVICES command and the option to select all the
 161  * devices to be supported
 162  */
 163 #define PMCRAID_SET_SUPPORTED_DEVICES            0xFB
 164 #define ALL_DEVICES_SUPPORTED                    PMC_BIT8(0)
 165
 166 /* This option is used with SCSI WRITE_BUFFER command */
 167 #define PMCRAID_WR_BUF_DOWNLOAD_AND_SAVE         0x05
 168
 169 /* IOASC Codes used by driver */
 170 #define PMCRAID_IOASC_SENSE_MASK                 0xFFFFFF00
 171 #define PMCRAID_IOASC_SENSE_KEY(ioasc)           ((ioasc) >> 24)
 172 #define PMCRAID_IOASC_SENSE_CODE(ioasc)          (((ioasc) & 0x00ff0000) >> 16)
 173 #define PMCRAID_IOASC_SENSE_QUAL(ioasc)          (((ioasc) & 0x0000ff00) >> 8)
 174 #define PMCRAID_IOASC_SENSE_STATUS(ioasc)        ((ioasc) & 0x000000ff)
 175
 176 #define PMCRAID_IOASC_GOOD_COMPLETION                   0x00000000
 177 #define PMCRAID_IOASC_NR_INIT_CMD_REQUIRED              0x02040200
 178 #define PMCRAID_IOASC_NR_IOA_RESET_REQUIRED             0x02048000
 179 #define PMCRAID_IOASC_NR_SYNC_REQUIRED                  0x023F0000
 180 #define PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC          0x03110C00
 181 #define PMCRAID_IOASC_HW_CANNOT_COMMUNICATE             0x04050000
 182 #define PMCRAID_IOASC_HW_DEVICE_TIMEOUT                 0x04080100
 183 #define PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR        0x04448500
 184 #define PMCRAID_IOASC_HW_IOA_RESET_REQUIRED             0x04448600
 185 #define PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE        0x05250000
 186 #define PMCRAID_IOASC_AC_TERMINATED_BY_HOST             0x0B5A0000
 187 #define PMCRAID_IOASC_UA_BUS_WAS_RESET                  0x06290000
 188 #define PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER         0x06298000
 189
 190 /* Driver defined IOASCs */
 191 #define PMCRAID_IOASC_IOA_WAS_RESET                     0x10000001
 192 #define PMCRAID_IOASC_PCI_ACCESS_ERROR                  0x10000002
 193
 194 /* Various timeout values (in milliseconds) used. If any of these are chip
 195  * specific, move them to pmcraid_chip_details structure.
 196  */
 197 #define PMCRAID_PCI_DEASSERT_TIMEOUT            2000
 198 #define PMCRAID_BIST_TIMEOUT                    2000
 199 #define PMCRAID_AENWAIT_TIMEOUT                 5000
 200 #define PMCRAID_TRANSOP_TIMEOUT                 60000
 201
 202 #define PMCRAID_RESET_TIMEOUT                   (2 * HZ)
 203 #define PMCRAID_CHECK_FOR_RESET_TIMEOUT         ((HZ / 10))
 204 #define PMCRAID_VSET_IO_TIMEOUT                 (60 * HZ)
 205 #define PMCRAID_INTERNAL_TIMEOUT                (60 * HZ)
 206 #define PMCRAID_SHUTDOWN_TIMEOUT                (150 * HZ)
 207 #define PMCRAID_RESET_BUS_TIMEOUT               (60 * HZ)
 208 #define PMCRAID_RESET_HOST_TIMEOUT              (150 * HZ)
 209 #define PMCRAID_REQUEST_SENSE_TIMEOUT           (30 * HZ)
 210 #define PMCRAID_SET_SUP_DEV_TIMEOUT             (2 * 60 * HZ)
 211
 212 /* structure to represent a scatter-gather element (IOADL descriptor) */
 213 struct pmcraid_ioadl_desc {
 214         __le64 address;
 215         __le32 data_len;
 216         __u8  reserved[3];
 217         __u8  flags;
 218 } __attribute__((packed, aligned(PMCRAID_IOADL_ALIGNMENT)));
 219
 220 /* pmcraid_ioadl_desc.flags values */
 221 #define IOADL_FLAGS_CHAINED      PMC_BIT8(0)
 222 #define IOADL_FLAGS_LAST_DESC    PMC_BIT8(1)
 223 #define IOADL_FLAGS_READ_LAST    PMC_BIT8(1)
 224 #define IOADL_FLAGS_WRITE_LAST   PMC_BIT8(1)
 225
 226
 227 /* additional IOARCB data which can be CDB or additional request parameters
 228  * or list of IOADLs. Firmware supports max of 512 bytes for IOARCB, hence then
 229  * number of IOADLs are limted to 27. In case they are more than 27, they will
 230  * be used in chained form
 231  */
 232 struct pmcraid_ioarcb_add_data {
 233         union {
 234                 struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_INTERNAL];
 235                 __u8 add_cmd_params[PMCRAID_ADD_CMD_PARAM_LEN];
 236         } u;
 237 };
 238
 239 /*
 240  * IOA Request Control Block
 241  */
 242 struct pmcraid_ioarcb {
 243         __le64 ioarcb_bus_addr;
 244         __le32 resource_handle;
 245         __le32 response_handle;
 246         __le64 ioadl_bus_addr;
 247         __le32 ioadl_length;
 248         __le32 data_transfer_length;
 249         __le64 ioasa_bus_addr;
 250         __le16 ioasa_len;
 251         __le16 cmd_timeout;
 252         __le16 add_cmd_param_offset;
 253         __le16 add_cmd_param_length;
 254         __le32 reserved1[2];
 255         __le32 reserved2;
 256         __u8  request_type;
 257         __u8  request_flags0;
 258         __u8  request_flags1;
 259         __u8  hrrq_id;
 260         __u8  cdb[PMCRAID_MAX_CDB_LEN];
 261         struct pmcraid_ioarcb_add_data add_data;
 262 } __attribute__((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
 263
 264 /* well known resource handle values */
 265 #define PMCRAID_IOA_RES_HANDLE        0xffffffff
 266 #define PMCRAID_INVALID_RES_HANDLE    0
 267
 268 /* pmcraid_ioarcb.request_type values */
 269 #define REQ_TYPE_SCSI                 0x00
 270 #define REQ_TYPE_IOACMD               0x01
 271 #define REQ_TYPE_HCAM                 0x02
 272
 273 /* pmcraid_ioarcb.flags0 values */
 274 #define TRANSFER_DIR_WRITE            PMC_BIT8(0)
 275 #define INHIBIT_UL_CHECK              PMC_BIT8(2)
 276 #define SYNC_OVERRIDE                 PMC_BIT8(3)
 277 #define SYNC_COMPLETE                 PMC_BIT8(4)
 278 #define NO_LINK_DESCS                 PMC_BIT8(5)
 279
 280 /* pmcraid_ioarcb.flags1 values */
 281 #define DELAY_AFTER_RESET             PMC_BIT8(0)
 282 #define TASK_TAG_SIMPLE               0x10
 283 #define TASK_TAG_ORDERED              0x20
 284 #define TASK_TAG_QUEUE_HEAD           0x30
 285
 286 /* toggle bit offset in response handle */
 287 #define HRRQ_TOGGLE_BIT               0x01
 288 #define HRRQ_RESPONSE_BIT             0x02
 289
 290 /* IOA Status Area */
 291 struct pmcraid_ioasa_vset {
 292         __le32 failing_lba_hi;
 293         __le32 failing_lba_lo;
 294         __le32 reserved;
 295 } __attribute__((packed, aligned(4)));
 296
 297 struct pmcraid_ioasa {
 298         __le32 ioasc;
 299         __le16 returned_status_length;
 300         __le16 available_status_length;
 301         __le32 residual_data_length;
 302         __le32 ilid;
 303         __le32 fd_ioasc;
 304         __le32 fd_res_address;
 305         __le32 fd_res_handle;
 306         __le32 reserved;
 307
 308         /* resource specific sense information */
 309         union {
 310                 struct pmcraid_ioasa_vset vset;
 311         } u;
 312
 313         /* IOA autosense data */
 314         __le16 auto_sense_length;
 315         __le16 error_data_length;
 316         __u8  sense_data[PMCRAID_SENSE_DATA_LEN];
 317 } __attribute__((packed, aligned(4)));
 318
 319 #define PMCRAID_DRIVER_ILID           0xffffffff
 320
 321 /* Config Table Entry per Resource */
 322 struct pmcraid_config_table_entry {
 323         __u8  resource_type;
 324         __u8  bus_protocol;
 325         __le16 array_id;
 326         __u8  common_flags0;
 327         __u8  common_flags1;
 328         __u8  unique_flags0;
 329         __u8  unique_flags1;    /*also used as vset target_id */
 330         __le32 resource_handle;
 331         __le32 resource_address;
 332         __u8  device_id[PMCRAID_DEVICE_ID_LEN];
 333         __u8  lun[PMCRAID_LUN_LEN];
 334 } __attribute__((packed, aligned(4)));
 335
 336 /* resource types (config_table_entry.resource_type values) */
 337 #define RES_TYPE_AF_DASD     0x00
 338 #define RES_TYPE_GSCSI       0x01
 339 #define RES_TYPE_VSET        0x02
 340 #define RES_TYPE_IOA_FP      0xFF
 341
 342 #define RES_IS_IOA(res)      ((res).resource_type == RES_TYPE_IOA_FP)
 343 #define RES_IS_GSCSI(res)    ((res).resource_type == RES_TYPE_GSCSI)
 344 #define RES_IS_VSET(res)     ((res).resource_type == RES_TYPE_VSET)
 345 #define RES_IS_AFDASD(res)   ((res).resource_type == RES_TYPE_AF_DASD)
 346
 347 /* bus_protocol values used by driver */
 348 #define RES_TYPE_VENCLOSURE  0x8
 349
 350 /* config_table_entry.common_flags0 */
 351 #define MULTIPATH_RESOURCE   PMC_BIT32(0)
 352
 353 /* unique_flags1 */
 354 #define IMPORT_MODE_MANUAL   PMC_BIT8(0)
 355
 356 /* well known resource handle values */
 357 #define RES_HANDLE_IOA       0xFFFFFFFF
 358 #define RES_HANDLE_NONE      0x00000000
 359
 360 /* well known resource address values */
 361 #define RES_ADDRESS_IOAFP    0xFEFFFFFF
 362 #define RES_ADDRESS_INVALID  0xFFFFFFFF
 363
 364 /* BUS/TARGET/LUN values from resource_addrr */
 365 #define RES_BUS(res_addr)    (le32_to_cpu(res_addr) & 0xFF)
 366 #define RES_TARGET(res_addr) ((le32_to_cpu(res_addr) >> 16) & 0xFF)
 367 #define RES_LUN(res_addr)    0x0
 368
 369 /* configuration table structure */
 370 struct pmcraid_config_table {
 371         __le16 num_entries;
 372         __u8  table_format;
 373         __u8  reserved1;
 374         __u8  flags;
 375         __u8  reserved2[11];
 376         struct pmcraid_config_table_entry entries[PMCRAID_MAX_RESOURCES];
 377 } __attribute__((packed, aligned(4)));
 378
 379 /* config_table.flags value */
 380 #define MICROCODE_UPDATE_REQUIRED               PMC_BIT32(0)
 381
 382 /*
 383  * HCAM format
 384  */
 385 #define PMCRAID_HOSTRCB_LDNSIZE                 4056
 386
 387 /* Error log notification format */
 388 struct pmcraid_hostrcb_error {
 389         __le32 fd_ioasc;
 390         __le32 fd_ra;
 391         __le32 fd_rh;
 392         __le32 prc;
 393         union {
 394                 __u8 data[PMCRAID_HOSTRCB_LDNSIZE];
 395         } u;
 396 } __attribute__ ((packed, aligned(4)));
 397
 398 struct pmcraid_hcam_hdr {
 399         __u8  op_code;
 400         __u8  notification_type;
 401         __u8  notification_lost;
 402         __u8  flags;
 403         __u8  overlay_id;
 404         __u8  reserved1[3];
 405         __le32 ilid;
 406         __le32 timestamp1;
 407         __le32 timestamp2;
 408         __le32 data_len;
 409 } __attribute__((packed, aligned(4)));
 410
 411 #define PMCRAID_AEN_GROUP       0x3
 412
 413 struct pmcraid_hcam_ccn {
 414         struct pmcraid_hcam_hdr header;
 415         struct pmcraid_config_table_entry cfg_entry;
 416 } __attribute__((packed, aligned(4)));
 417
 418 struct pmcraid_hcam_ldn {
 419         struct pmcraid_hcam_hdr header;
 420         struct pmcraid_hostrcb_error error_log;
 421 } __attribute__((packed, aligned(4)));
 422
 423 /* pmcraid_hcam.op_code values */
 424 #define HOSTRCB_TYPE_CCN                        0xE1
 425 #define HOSTRCB_TYPE_LDN                        0xE2
 426
 427 /* pmcraid_hcam.notification_type values */
 428 #define NOTIFICATION_TYPE_ENTRY_CHANGED         0x0
 429 #define NOTIFICATION_TYPE_ENTRY_NEW             0x1
 430 #define NOTIFICATION_TYPE_ENTRY_DELETED         0x2
 431 #define NOTIFICATION_TYPE_ERROR_LOG             0x10
 432 #define NOTIFICATION_TYPE_INFORMATION_LOG       0x11
 433
 434 #define HOSTRCB_NOTIFICATIONS_LOST              PMC_BIT8(0)
 435
 436 /* pmcraid_hcam.flags values */
 437 #define HOSTRCB_INTERNAL_OP_ERROR               PMC_BIT8(0)
 438 #define HOSTRCB_ERROR_RESPONSE_SENT             PMC_BIT8(1)
 439
 440 /* pmcraid_hcam.overlay_id values */
 441 #define HOSTRCB_OVERLAY_ID_08                   0x08
 442 #define HOSTRCB_OVERLAY_ID_09                   0x09
 443 #define HOSTRCB_OVERLAY_ID_11                   0x11
 444 #define HOSTRCB_OVERLAY_ID_12                   0x12
 445 #define HOSTRCB_OVERLAY_ID_13                   0x13
 446 #define HOSTRCB_OVERLAY_ID_14                   0x14
 447 #define HOSTRCB_OVERLAY_ID_16                   0x16
 448 #define HOSTRCB_OVERLAY_ID_17                   0x17
 449 #define HOSTRCB_OVERLAY_ID_20                   0x20
 450 #define HOSTRCB_OVERLAY_ID_FF                   0xFF
 451
 452 /* Implementation specific card details */
 453 struct pmcraid_chip_details {
 454         /* hardware register offsets */
 455         unsigned long  ioastatus;
 456         unsigned long  ioarrin;
 457         unsigned long  mailbox;
 458         unsigned long  global_intr_mask;
 459         unsigned long  ioa_host_intr;
 460         unsigned long  ioa_host_intr_clr;
 461         unsigned long  ioa_host_mask;
 462         unsigned long  ioa_host_mask_clr;
 463         unsigned long  host_ioa_intr;
 464         unsigned long  host_ioa_intr_clr;
 465
 466         /* timeout used during transitional to operational state */
 467         unsigned long transop_timeout;
 468 };
 469
 470 /* IOA to HOST doorbells (interrupts) */
 471 #define INTRS_TRANSITION_TO_OPERATIONAL         PMC_BIT32(0)
 472 #define INTRS_IOARCB_TRANSFER_FAILED            PMC_BIT32(3)
 473 #define INTRS_IOA_UNIT_CHECK                    PMC_BIT32(4)
 474 #define INTRS_NO_HRRQ_FOR_CMD_RESPONSE          PMC_BIT32(5)
 475 #define INTRS_CRITICAL_OP_IN_PROGRESS           PMC_BIT32(6)
 476 #define INTRS_IO_DEBUG_ACK                      PMC_BIT32(7)
 477 #define INTRS_IOARRIN_LOST                      PMC_BIT32(27)
 478 #define INTRS_SYSTEM_BUS_MMIO_ERROR             PMC_BIT32(28)
 479 #define INTRS_IOA_PROCESSOR_ERROR               PMC_BIT32(29)
 480 #define INTRS_HRRQ_VALID                        PMC_BIT32(30)
 481 #define INTRS_OPERATIONAL_STATUS                PMC_BIT32(0)
 482
 483 /* Host to IOA Doorbells */
 484 #define DOORBELL_RUNTIME_RESET                  PMC_BIT32(1)
 485 #define DOORBELL_IOA_RESET_ALERT                PMC_BIT32(7)
 486 #define DOORBELL_IOA_DEBUG_ALERT                PMC_BIT32(9)
 487 #define DOORBELL_ENABLE_DESTRUCTIVE_DIAGS       PMC_BIT32(8)
 488 #define DOORBELL_IOA_START_BIST                 PMC_BIT32(23)
 489 #define DOORBELL_RESET_IOA                      PMC_BIT32(31)
 490
 491 /* Global interrupt mask register value */
 492 #define GLOBAL_INTERRUPT_MASK                   0x4ULL
 493
 494 #define PMCRAID_ERROR_INTERRUPTS        (INTRS_IOARCB_TRANSFER_FAILED | \
 495                                          INTRS_IOA_UNIT_CHECK | \
 496                                          INTRS_NO_HRRQ_FOR_CMD_RESPONSE | \
 497                                          INTRS_IOARRIN_LOST | \
 498                                          INTRS_SYSTEM_BUS_MMIO_ERROR | \
 499                                          INTRS_IOA_PROCESSOR_ERROR)
 500
 501 #define PMCRAID_PCI_INTERRUPTS          (PMCRAID_ERROR_INTERRUPTS | \
 502                                          INTRS_HRRQ_VALID | \
 503                                          INTRS_CRITICAL_OP_IN_PROGRESS |\
 504                                          INTRS_TRANSITION_TO_OPERATIONAL)
 505
 506 /* control_block, associated with each of the commands contains IOARCB, IOADLs
 507  * memory for IOASA. Additional 3 * 16 bytes are allocated in order to support
 508  * additional request parameters (of max size 48) any command.
 509  */
 510 struct pmcraid_control_block {
 511         struct pmcraid_ioarcb ioarcb;
 512         struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_EXTERNAL + 3];
 513         struct pmcraid_ioasa ioasa;
 514 } __attribute__ ((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
 515
 516 /* pmcraid_sglist - Scatter-gather list allocated for passthrough ioctls
 517  */
 518 struct pmcraid_sglist {
 519         u32 order;
 520         u32 num_sg;
 521         u32 num_dma_sg;
 522         u32 buffer_len;
 523         struct scatterlist scatterlist[1];
 524 };
 525
 526 /* pmcraid_cmd - LLD representation of SCSI command */
 527 struct pmcraid_cmd {
 528
 529         /* Ptr and bus address of DMA.able control block for this command */
 530         struct pmcraid_control_block *ioa_cb;
 531         dma_addr_t ioa_cb_bus_addr;
 532
 533         /* sense buffer for REQUEST SENSE command if firmware is not sending
 534          * auto sense data
 535          */
 536         dma_addr_t sense_buffer_dma;
 537         dma_addr_t dma_handle;
 538         u8 *sense_buffer;
 539
 540         /* pointer to mid layer structure of SCSI commands */
 541         struct scsi_cmnd *scsi_cmd;
 542
 543         struct list_head free_list;
 544         struct completion wait_for_completion;
 545         struct timer_list timer;        /* needed for internal commands */
 546         u32 timeout;                    /* current timeout value */
 547         u32 index;                      /* index into the command list */
 548         u8 completion_req;              /* for handling internal commands */
 549         u8 release;                     /* for handling completions */
 550
 551         void (*cmd_done) (struct pmcraid_cmd *);
 552         struct pmcraid_instance *drv_inst;
 553
 554         struct pmcraid_sglist *sglist; /* used for passthrough IOCTLs */
 555
 556         /* scratch used during reset sequence */
 557         union {
 558                 unsigned long time_left;
 559                 struct pmcraid_resource_entry *res;
 560         } u;
 561 };
 562
 563 /*
 564  * Interrupt registers of IOA
 565  */
 566 struct pmcraid_interrupts {
 567         void __iomem *ioa_host_interrupt_reg;
 568         void __iomem *ioa_host_interrupt_clr_reg;
 569         void __iomem *ioa_host_interrupt_mask_reg;
 570         void __iomem *ioa_host_interrupt_mask_clr_reg;
 571         void __iomem *global_interrupt_mask_reg;
 572         void __iomem *host_ioa_interrupt_reg;
 573         void __iomem *host_ioa_interrupt_clr_reg;
 574 };
 575
 576 /* ISR parameters LLD allocates (one for each MSI-X if enabled) vectors */
 577 struct pmcraid_isr_param {
 578         u8 hrrq_id;                     /* hrrq entry index */
 579         u16 vector;                     /* allocated msi-x vector */
 580         struct pmcraid_instance *drv_inst;
 581 };
 582
 583 /* AEN message header sent as part of event data to applications */
 584 struct pmcraid_aen_msg {
 585         u32 hostno;
 586         u32 length;
 587         u8  reserved[8];
 588         u8  data[0];
 589 };
 590
 591 struct pmcraid_hostrcb {
 592         struct pmcraid_instance *drv_inst;
 593         struct pmcraid_aen_msg *msg;
 594         struct pmcraid_hcam_hdr *hcam;  /* pointer to hcam buffer */
 595         struct pmcraid_cmd  *cmd;       /* pointer to command block used */
 596         dma_addr_t baddr;               /* system address of hcam buffer */
 597         atomic_t ignore;                /* process HCAM response ? */
 598 };
 599
 600 #define PMCRAID_AEN_HDR_SIZE    sizeof(struct pmcraid_aen_msg)
 601
 602
 603
 604 /*
 605  * Per adapter structure maintained by LLD
 606  */
 607 struct pmcraid_instance {
 608         /* Array of allowed-to-be-exposed resources, initialized from
 609          * Configutation Table, later updated with CCNs
 610          */
 611         struct pmcraid_resource_entry *res_entries;
 612
 613         struct list_head free_res_q;    /* res_entries lists for easy lookup */
 614         struct list_head used_res_q;    /* List of to be exposed resources */
 615         spinlock_t resource_lock;       /* spinlock to protect resource list */
 616
 617         void __iomem *mapped_dma_addr;
 618         void __iomem *ioa_status;       /* Iomapped IOA status register */
 619         void __iomem *mailbox;          /* Iomapped mailbox register */
 620         void __iomem *ioarrin;          /* IOmapped IOARR IN register */
 621
 622         struct pmcraid_interrupts int_regs;
 623         struct pmcraid_chip_details *chip_cfg;
 624
 625         /* HostRCBs needed for HCAM */
 626         struct pmcraid_hostrcb ldn;
 627         struct pmcraid_hostrcb ccn;
 628
 629
 630         /* Bus address of start of HRRQ */
 631         dma_addr_t hrrq_start_bus_addr[PMCRAID_NUM_MSIX_VECTORS];
 632
 633         /* Pointer to 1st entry of HRRQ */
 634         __be32 *hrrq_start[PMCRAID_NUM_MSIX_VECTORS];
 635
 636         /* Pointer to last entry of HRRQ */
 637         __be32 *hrrq_end[PMCRAID_NUM_MSIX_VECTORS];
 638
 639         /* Pointer to current pointer of hrrq */
 640         __be32 *hrrq_curr[PMCRAID_NUM_MSIX_VECTORS];
 641
 642         /* Lock for HRRQ access */
 643         spinlock_t hrrq_lock[PMCRAID_NUM_MSIX_VECTORS];
 644
 645         /* Expected toggle bit at host */
 646         u8 host_toggle_bit[PMCRAID_NUM_MSIX_VECTORS];
 647
 648         /* No of Reset IOA retries . IOA marked dead if threshold exceeds */
 649         u8 ioa_reset_attempts;
 650 #define PMCRAID_RESET_ATTEMPTS 3
 651
 652         /* Wait Q for  threads to wait for Reset IOA completion */
 653         wait_queue_head_t reset_wait_q;
 654         struct pmcraid_cmd *reset_cmd;
 655
 656         /* structures for supporting SIGIO based AEN. */
 657         struct fasync_struct *aen_queue;
 658         struct mutex aen_queue_lock;    /* lock for aen subscribers list */
 659         struct cdev cdev;
 660
 661         struct Scsi_Host *host; /* mid layer interface structure handle */
 662         struct pci_dev *pdev;   /* PCI device structure handle */
 663
 664         u8  current_log_level;  /* default level for logging IOASC errors */
 665
 666         u8  num_hrrq;           /* Number of interrupt vectors allocated */
 667         dev_t dev;              /* Major-Minor numbers for Char device */
 668
 669         /* Used as ISR handler argument */
 670         struct pmcraid_isr_param hrrq_vector[PMCRAID_NUM_MSIX_VECTORS];
 671
 672         /* configuration table */
 673         struct pmcraid_config_table *cfg_table;
 674         dma_addr_t cfg_table_bus_addr;
 675
 676         /* structures related to command blocks */
 677         struct kmem_cache *cmd_cachep;          /* cache for cmd blocks */
 678         struct pci_pool *control_pool;          /* pool for control blocks */
 679         char   cmd_pool_name[64];               /* name of cmd cache */
 680         char   ctl_pool_name[64];               /* name of control cache */
 681
 682         struct pmcraid_cmd *cmd_list[PMCRAID_MAX_CMD];
 683
 684         struct list_head free_cmd_pool;
 685         struct list_head pending_cmd_pool;
 686         spinlock_t free_pool_lock;              /* free pool lock */
 687         spinlock_t pending_pool_lock;           /* pending pool lock */
 688
 689         /* No of IO commands pending with FW */
 690         atomic_t outstanding_cmds;
 691
 692         /* should add/delete resources to mid-layer now ?*/
 693         atomic_t expose_resources;
 694
 695         /* Tasklet to handle deferred processing */
 696         struct tasklet_struct isr_tasklet[PMCRAID_NUM_MSIX_VECTORS];
 697
 698         /* Work-queue (Shared) for deferred reset processing */
 699         struct work_struct worker_q;
 700
 701
 702         u32 ioa_state:4;        /* For IOA Reset sequence FSM */
 703 #define IOA_STATE_OPERATIONAL       0x0
 704 #define IOA_STATE_UNKNOWN           0x1
 705 #define IOA_STATE_DEAD              0x2
 706 #define IOA_STATE_IN_SOFT_RESET     0x3
 707 #define IOA_STATE_IN_HARD_RESET     0x4
 708 #define IOA_STATE_IN_RESET_ALERT    0x5
 709 #define IOA_STATE_IN_BRINGDOWN      0x6
 710 #define IOA_STATE_IN_BRINGUP        0x7
 711
 712         u32 ioa_reset_in_progress:1; /* true if IOA reset is in progress */
 713         u32 ioa_hard_reset:1;   /* TRUE if Hard Reset is needed */
 714         u32 ioa_unit_check:1;   /* Indicates Unit Check condition */
 715         u32 ioa_bringdown:1;    /* whether IOA needs to be brought down */
 716         u32 force_ioa_reset:1;  /* force adapter reset ? */
 717         u32 reinit_cfg_table:1; /* reinit config table due to lost CCN */
 718         u32 ioa_shutdown_type:2;/* shutdown type used during reset */
 719 #define SHUTDOWN_NONE               0x0
 720 #define SHUTDOWN_NORMAL             0x1
 721 #define SHUTDOWN_ABBREV             0x2
 722
 723 };
 724
 725 /* LLD maintained resource entry structure */
 726 struct pmcraid_resource_entry {
 727         struct list_head queue; /* link to "to be exposed" resources */
 728         struct pmcraid_config_table_entry cfg_entry;
 729         struct scsi_device *scsi_dev;   /* Link scsi_device structure */
 730         atomic_t read_failures;         /* count of failed READ commands */
 731         atomic_t write_failures;        /* count of failed WRITE commands */
 732
 733         /* To indicate add/delete/modify during CCN */
 734         u8 change_detected;
 735 #define RES_CHANGE_ADD          0x1     /* add this to mid-layer */
 736 #define RES_CHANGE_DEL          0x2     /* remove this from mid-layer */
 737
 738         u8 reset_progress;      /* Device is resetting */
 739
 740         /*
 741          * When IOA asks for sync (i.e. IOASC = Not Ready, Sync Required), this
 742          * flag will be set, mid layer will be asked to retry. In the next
 743          * attempt, this flag will be checked in queuecommand() to set
 744          * SYNC_COMPLETE flag in IOARCB (flag_0).
 745          */
 746         u8 sync_reqd;
 747
 748         /* target indicates the mapped target_id assigned to this resource if
 749          * this is VSET resource. For non-VSET resources this will be un-used
 750          * or zero
 751          */
 752         u8 target;
 753 };
 754
 755 /* Data structures used in IOASC error code logging */
 756 struct pmcraid_ioasc_error {
 757         u32 ioasc_code;         /* IOASC code */
 758         u8 log_level;           /* default log level assignment. */
 759         char *error_string;
 760 };
 761
 762 /* Initial log_level assignments for various IOASCs */
 763 #define IOASC_LOG_LEVEL_NONE        0x0 /* no logging */
 764 #define IOASC_LOG_LEVEL_MUST        0x1 /* must log: all high-severity errors */
 765 #define IOASC_LOG_LEVEL_HARD        0x2 /* optional – low severity errors */
 766
 767 /* Error information maintained by LLD. LLD initializes the pmcraid_error_table
 768  * statically.
 769  */
 770 static struct pmcraid_ioasc_error pmcraid_ioasc_error_table[] = {
 771         {0x01180600, IOASC_LOG_LEVEL_MUST,
 772          "Recovered Error, soft media error, sector reassignment suggested"},
 773         {0x015D0000, IOASC_LOG_LEVEL_MUST,
 774          "Recovered Error, failure prediction threshold exceeded"},
 775         {0x015D9200, IOASC_LOG_LEVEL_MUST,
 776          "Recovered Error, soft Cache Card Battery error threshold"},
 777         {0x015D9200, IOASC_LOG_LEVEL_MUST,
 778          "Recovered Error, soft Cache Card Battery error threshold"},
 779         {0x02048000, IOASC_LOG_LEVEL_MUST,
 780          "Not Ready, IOA Reset Required"},
 781         {0x02408500, IOASC_LOG_LEVEL_MUST,
 782          "Not Ready, IOA microcode download required"},
 783         {0x03110B00, IOASC_LOG_LEVEL_MUST,
 784          "Medium Error, data unreadable, reassignment suggested"},
 785         {0x03110C00, IOASC_LOG_LEVEL_MUST,
 786          "Medium Error, data unreadable do not reassign"},
 787         {0x03310000, IOASC_LOG_LEVEL_MUST,
 788          "Medium Error, media corrupted"},
 789         {0x04050000, IOASC_LOG_LEVEL_MUST,
 790          "Hardware Error, IOA can't communicate with device"},
 791         {0x04080000, IOASC_LOG_LEVEL_MUST,
 792          "Hardware Error, device bus error"},
 793         {0x04080000, IOASC_LOG_LEVEL_MUST,
 794          "Hardware Error, device bus is not functioning"},
 795         {0x04118000, IOASC_LOG_LEVEL_MUST,
 796          "Hardware Error, IOA reserved area data check"},
 797         {0x04118100, IOASC_LOG_LEVEL_MUST,
 798          "Hardware Error, IOA reserved area invalid data pattern"},
 799         {0x04118200, IOASC_LOG_LEVEL_MUST,
 800          "Hardware Error, IOA reserved area LRC error"},
 801         {0x04320000, IOASC_LOG_LEVEL_MUST,
 802          "Hardware Error, reassignment space exhausted"},
 803         {0x04330000, IOASC_LOG_LEVEL_MUST,
 804          "Hardware Error, data transfer underlength error"},
 805         {0x04330000, IOASC_LOG_LEVEL_MUST,
 806          "Hardware Error, data transfer overlength error"},
 807         {0x04418000, IOASC_LOG_LEVEL_MUST,
 808          "Hardware Error, PCI bus error"},
 809         {0x04440000, IOASC_LOG_LEVEL_MUST,
 810          "Hardware Error, device error"},
 811         {0x04448300, IOASC_LOG_LEVEL_MUST,
 812          "Hardware Error, undefined device response"},
 813         {0x04448400, IOASC_LOG_LEVEL_MUST,
 814          "Hardware Error, IOA microcode error"},
 815         {0x04448600, IOASC_LOG_LEVEL_MUST,
 816          "Hardware Error, IOA reset required"},
 817         {0x04449200, IOASC_LOG_LEVEL_MUST,
 818          "Hardware Error, hard Cache Fearuee Card Battery error"},
 819         {0x0444A000, IOASC_LOG_LEVEL_MUST,
 820          "Hardware Error, failed device altered"},
 821         {0x0444A200, IOASC_LOG_LEVEL_MUST,
 822          "Hardware Error, data check after reassignment"},
 823         {0x0444A300, IOASC_LOG_LEVEL_MUST,
 824          "Hardware Error, LRC error after reassignment"},
 825         {0x044A0000, IOASC_LOG_LEVEL_MUST,
 826          "Hardware Error, device bus error (msg/cmd phase)"},
 827         {0x04670400, IOASC_LOG_LEVEL_MUST,
 828          "Hardware Error, new device can't be used"},
 829         {0x04678000, IOASC_LOG_LEVEL_MUST,
 830          "Hardware Error, invalid multiadapter configuration"},
 831         {0x04678100, IOASC_LOG_LEVEL_MUST,
 832          "Hardware Error, incorrect connection between enclosures"},
 833         {0x04678200, IOASC_LOG_LEVEL_MUST,
 834          "Hardware Error, connections exceed IOA design limits"},
 835         {0x04678300, IOASC_LOG_LEVEL_MUST,
 836          "Hardware Error, incorrect multipath connection"},
 837         {0x04679000, IOASC_LOG_LEVEL_MUST,
 838          "Hardware Error, command to LUN failed"},
 839         {0x064C8000, IOASC_LOG_LEVEL_HARD,
 840          "Unit Attention, cache exists for missing/failed device"},
 841         {0x06670100, IOASC_LOG_LEVEL_HARD,
 842          "Unit Attention, incompatible exposed mode device"},
 843         {0x06670600, IOASC_LOG_LEVEL_HARD,
 844          "Unit Attention, attachment of logical unit failed"},
 845         {0x06678000, IOASC_LOG_LEVEL_MUST,
 846          "Unit Attention, cables exceed connective design limit"},
 847         {0x06678300, IOASC_LOG_LEVEL_MUST,
 848          "Unit Attention, incomplete multipath connection between" \
 849          "IOA and enclosure"},
 850         {0x06678400, IOASC_LOG_LEVEL_MUST,
 851          "Unit Attention, incomplete multipath connection between" \
 852          "device and enclosure"},
 853         {0x06678500, IOASC_LOG_LEVEL_MUST,
 854          "Unit Attention, incomplete multipath connection between" \
 855          "IOA and remote IOA"},
 856         {0x06678600, IOASC_LOG_LEVEL_HARD,
 857          "Unit Attention, missing remote IOA"},
 858         {0x06679100, IOASC_LOG_LEVEL_HARD,
 859          "Unit Attention, enclosure doesn't support required multipath" \
 860          "function"},
 861         {0x06698200, IOASC_LOG_LEVEL_HARD,
 862          "Unit Attention, corrupt array parity detected on device"},
 863         {0x066B0200, IOASC_LOG_LEVEL_MUST,
 864          "Unit Attention, array exposed"},
 865         {0x066B8200, IOASC_LOG_LEVEL_HARD,
 866          "Unit Attention, exposed array is still protected"},
 867         {0x066B9200, IOASC_LOG_LEVEL_MUST,
 868          "Unit Attention, Multipath redundancy level got worse"},
 869         {0x07270000, IOASC_LOG_LEVEL_HARD,
 870          "Data Protect, device is read/write protected by IOA"},
 871         {0x07278000, IOASC_LOG_LEVEL_HARD,
 872          "Data Protect, IOA doesn't support device attribute"},
 873         {0x07278100, IOASC_LOG_LEVEL_HARD,
 874          "Data Protect, NVRAM mirroring prohibited"},
 875         {0x07278400, IOASC_LOG_LEVEL_MUST,
 876          "Data Protect, array is short 2 or more devices"},
 877         {0x07278600, IOASC_LOG_LEVEL_MUST,
 878          "Data Protect, exposed array is short a required device"},
 879         {0x07278700, IOASC_LOG_LEVEL_MUST,
 880          "Data Protect, array members not at required addresses"},
 881         {0x07278800, IOASC_LOG_LEVEL_MUST,
 882          "Data Protect, exposed mode device resource address conflict"},
 883         {0x07278900, IOASC_LOG_LEVEL_MUST,
 884          "Data Protect, incorrect resource address of exposed mode device"},
 885         {0x07278A00, IOASC_LOG_LEVEL_MUST,
 886          "Data Protect, Array is missing a device and parity is out of sync"},
 887         {0x07278B00, IOASC_LOG_LEVEL_MUST,
 888          "Data Protect, maximum number of arrays already exist"},
 889         {0x07278C00, IOASC_LOG_LEVEL_HARD,
 890          "Data Protect, cannot locate cache data for device"},
 891         {0x07278D00, IOASC_LOG_LEVEL_HARD,
 892          "Data Protect, cache data exits for a changed device"},
 893         {0x07279100, IOASC_LOG_LEVEL_MUST,
 894          "Data Protect, detection of a device requiring format"},
 895         {0x07279200, IOASC_LOG_LEVEL_MUST,
 896          "Data Protect, IOA exceeds maximum number of devices"},
 897         {0x07279600, IOASC_LOG_LEVEL_MUST,
 898          "Data Protect, missing array, volume set is not functional"},
 899         {0x07279700, IOASC_LOG_LEVEL_MUST,
 900          "Data Protect, single device for a volume set"},
 901         {0x07279800, IOASC_LOG_LEVEL_MUST,
 902          "Data Protect, missing multiple devices for a volume set"},
 903         {0x07279900, IOASC_LOG_LEVEL_HARD,
 904          "Data Protect, maximum number of volument sets already exists"},
 905         {0x07279A00, IOASC_LOG_LEVEL_MUST,
 906          "Data Protect, other volume set problem"},
 907 };
 908
 909 /* macros to help in debugging */
 910 #define pmcraid_err(...)  \
 911         printk(KERN_ERR "MaxRAID: "__VA_ARGS__)
 912
 913 #define pmcraid_info(...) \
 914         if (pmcraid_debug_log) \
 915                 printk(KERN_INFO "MaxRAID: "__VA_ARGS__)
 916
 917 /* check if given command is a SCSI READ or SCSI WRITE command */
 918 #define SCSI_READ_CMD           0x1     /* any of SCSI READ commands */
 919 #define SCSI_WRITE_CMD          0x2     /* any of SCSI WRITE commands */
 920 #define SCSI_CMD_TYPE(opcode) \
 921 ({  u8 op = opcode; u8 __type = 0;\
 922         if (op == READ_6 || op == READ_10 || op == READ_12 || op == READ_16)\
 923                 __type = SCSI_READ_CMD;\
 924         else if (op == WRITE_6 || op == WRITE_10 || op == WRITE_12 || \
 925                  op == WRITE_16)\
 926                 __type = SCSI_WRITE_CMD;\
 927         __type;\
 928 })
 929
 930 #define IS_SCSI_READ_WRITE(opcode) \
 931 ({      u8 __type = SCSI_CMD_TYPE(opcode); \
 932         (__type == SCSI_READ_CMD || __type == SCSI_WRITE_CMD) ? 1 : 0;\
 933 })
 934
 935
 936 /*
 937  * pmcraid_ioctl_header - definition of header structure that preceeds all the
 938  * buffers given as ioctl arguements.
 939  *
 940  * .signature           : always ASCII string, "PMCRAID"
 941  * .reserved            : not used
 942  * .buffer_length       : length of the buffer following the header
 943  */
 944 struct pmcraid_ioctl_header {
 945         u8  signature[8];
 946         u32 reserved;
 947         u32 buffer_length;
 948 };
 949
 950 #define PMCRAID_IOCTL_SIGNATURE      "PMCRAID"
 951
 952
 953 /*
 954  * pmcraid_event_details - defines AEN details that apps can retrieve from LLD
 955  *
 956  * .rcb_ccn - complete RCB of CCN
 957  * .rcb_ldn - complete RCB of CCN
 958  */
 959 struct pmcraid_event_details {
 960         struct pmcraid_hcam_ccn rcb_ccn;
 961         struct pmcraid_hcam_ldn rcb_ldn;
 962 };
 963
 964 /*
 965  * pmcraid_driver_ioctl_buffer - structure passed as argument to most of the
 966  * PMC driver handled ioctls.
 967  */
 968 struct pmcraid_driver_ioctl_buffer {
 969         struct pmcraid_ioctl_header ioctl_header;
 970         struct pmcraid_event_details event_details;
 971 };
 972
 973 /*
 974  * pmcraid_passthrough_ioctl_buffer - structure given as argument to
 975  * passthrough(or firmware handled) IOCTL commands. Note that ioarcb requires
 976  * 32-byte alignment so, it is necessary to pack this structure to avoid any
 977  * holes between ioctl_header and passthrough buffer
 978  *
 979  * .ioactl_header : ioctl header
 980  * .ioarcb        : filled-up ioarcb buffer, driver always reads this buffer
 981  * .ioasa         : buffer for ioasa, driver fills this with IOASA from firmware
 982  * .request_buffer: The I/O buffer (flat), driver reads/writes to this based on
 983  *                  the transfer directions passed in ioarcb.flags0. Contents
 984  *                  of this buffer are valid only when ioarcb.data_transfer_len
 985  *                  is not zero.
 986  */
 987 struct pmcraid_passthrough_ioctl_buffer {
 988         struct pmcraid_ioctl_header ioctl_header;
 989         struct pmcraid_ioarcb ioarcb;
 990         struct pmcraid_ioasa  ioasa;
 991         u8  request_buffer[1];
 992 } __attribute__ ((packed));
 993
 994 /*
 995  * keys to differentiate between driver handled IOCTLs and passthrough
 996  * IOCTLs passed to IOA. driver determines the ioctl type using macro
 997  * _IOC_TYPE
 998  */
 999 #define PMCRAID_DRIVER_IOCTL         'D'
1000 #define PMCRAID_PASSTHROUGH_IOCTL    'F'
1001
1002 #define DRV_IOCTL(n, size) \
1003     _IOC(_IOC_READ|_IOC_WRITE, PMCRAID_DRIVER_IOCTL, (n), (size))
1004
1005 #define FMW_IOCTL(n, size) \
1006     _IOC(_IOC_READ|_IOC_WRITE, PMCRAID_PASSTHROUGH_IOCTL,  (n), (size))
1007
1008 /*
1009  * _ARGSIZE: macro that gives size of the argument type passed to an IOCTL cmd.
1010  * This is to facilitate applications avoiding un-necessary memory allocations.
1011  * For example, most of driver handled ioctls do not require ioarcb, ioasa.
1012  */
1013 #define _ARGSIZE(arg) (sizeof(struct pmcraid_ioctl_header) + sizeof(arg))
1014
1015 /* Driver handled IOCTL command definitions */
1016
1017 #define PMCRAID_IOCTL_RESET_ADAPTER          \
1018         DRV_IOCTL(5, sizeof(struct pmcraid_ioctl_header))
1019
1020 /* passthrough/firmware handled commands */
1021 #define PMCRAID_IOCTL_PASSTHROUGH_COMMAND         \
1022         FMW_IOCTL(1, sizeof(struct pmcraid_passthrough_ioctl_buffer))
1023
1024 #define PMCRAID_IOCTL_DOWNLOAD_MICROCODE     \
1025         FMW_IOCTL(2, sizeof(struct pmcraid_passthrough_ioctl_buffer))
1026
1027
1028 #endif /* _PMCRAID_H */