include/linux/i2o.h

   1 /*
   2  * I2O kernel space accessible structures/APIs
   3  *
   4  * (c) Copyright 1999, 2000 Red Hat Software
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  *************************************************************************
  12  *
  13  * This header file defined the I2O APIs/structures for use by
  14  * the I2O kernel modules.
  15  *
  16  */
  17
  18 #ifndef _I2O_H
  19 #define _I2O_H
  20
  21 #include <linux/i2o-dev.h>
  22
  23 /* How many different OSM's are we allowing */
  24 #define I2O_MAX_DRIVERS         8
  25
  26 #include <linux/pci.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/string.h>
  29 #include <linux/slab.h>
  30 #include <linux/workqueue.h>    /* work_struct */
  31 #include <linux/mempool.h>
  32 #include <linux/mutex.h>
  33 #include <linux/scatterlist.h>
  34 #include <linux/semaphore.h>    /* Needed for MUTEX init macros */
  35
  36 #include <asm/io.h>
  37
  38 /* message queue empty */
  39 #define I2O_QUEUE_EMPTY         0xffffffff
  40
  41 /*
  42  *      Cache strategies
  43  */
  44
  45 /*      The NULL strategy leaves everything up to the controller. This tends to be a
  46  *      pessimal but functional choice.
  47  */
  48 #define CACHE_NULL              0
  49 /*      Prefetch data when reading. We continually attempt to load the next 32 sectors
  50  *      into the controller cache.
  51  */
  52 #define CACHE_PREFETCH          1
  53 /*      Prefetch data when reading. We sometimes attempt to load the next 32 sectors
  54  *      into the controller cache. When an I/O is less <= 8K we assume its probably
  55  *      not sequential and don't prefetch (default)
  56  */
  57 #define CACHE_SMARTFETCH        2
  58 /*      Data is written to the cache and then out on to the disk. The I/O must be
  59  *      physically on the medium before the write is acknowledged (default without
  60  *      NVRAM)
  61  */
  62 #define CACHE_WRITETHROUGH      17
  63 /*      Data is written to the cache and then out on to the disk. The controller
  64  *      is permitted to write back the cache any way it wants. (default if battery
  65  *      backed NVRAM is present). It can be useful to set this for swap regardless of
  66  *      battery state.
  67  */
  68 #define CACHE_WRITEBACK         18
  69 /*      Optimise for under powered controllers, especially on RAID1 and RAID0. We
  70  *      write large I/O's directly to disk bypassing the cache to avoid the extra
  71  *      memory copy hits. Small writes are writeback cached
  72  */
  73 #define CACHE_SMARTBACK         19
  74 /*      Optimise for under powered controllers, especially on RAID1 and RAID0. We
  75  *      write large I/O's directly to disk bypassing the cache to avoid the extra
  76  *      memory copy hits. Small writes are writethrough cached. Suitable for devices
  77  *      lacking battery backup
  78  */
  79 #define CACHE_SMARTTHROUGH      20
  80
  81 /*
  82  *      Ioctl structures
  83  */
  84
  85 #define         BLKI2OGRSTRAT   _IOR('2', 1, int)
  86 #define         BLKI2OGWSTRAT   _IOR('2', 2, int)
  87 #define         BLKI2OSRSTRAT   _IOW('2', 3, int)
  88 #define         BLKI2OSWSTRAT   _IOW('2', 4, int)
  89
  90 /*
  91  *      I2O Function codes
  92  */
  93
  94 /*
  95  *      Executive Class
  96  */
  97 #define I2O_CMD_ADAPTER_ASSIGN          0xB3
  98 #define I2O_CMD_ADAPTER_READ            0xB2
  99 #define I2O_CMD_ADAPTER_RELEASE         0xB5
 100 #define I2O_CMD_BIOS_INFO_SET           0xA5
 101 #define I2O_CMD_BOOT_DEVICE_SET         0xA7
 102 #define I2O_CMD_CONFIG_VALIDATE         0xBB
 103 #define I2O_CMD_CONN_SETUP              0xCA
 104 #define I2O_CMD_DDM_DESTROY             0xB1
 105 #define I2O_CMD_DDM_ENABLE              0xD5
 106 #define I2O_CMD_DDM_QUIESCE             0xC7
 107 #define I2O_CMD_DDM_RESET               0xD9
 108 #define I2O_CMD_DDM_SUSPEND             0xAF
 109 #define I2O_CMD_DEVICE_ASSIGN           0xB7
 110 #define I2O_CMD_DEVICE_RELEASE          0xB9
 111 #define I2O_CMD_HRT_GET                 0xA8
 112 #define I2O_CMD_ADAPTER_CLEAR           0xBE
 113 #define I2O_CMD_ADAPTER_CONNECT         0xC9
 114 #define I2O_CMD_ADAPTER_RESET           0xBD
 115 #define I2O_CMD_LCT_NOTIFY              0xA2
 116 #define I2O_CMD_OUTBOUND_INIT           0xA1
 117 #define I2O_CMD_PATH_ENABLE             0xD3
 118 #define I2O_CMD_PATH_QUIESCE            0xC5
 119 #define I2O_CMD_PATH_RESET              0xD7
 120 #define I2O_CMD_STATIC_MF_CREATE        0xDD
 121 #define I2O_CMD_STATIC_MF_RELEASE       0xDF
 122 #define I2O_CMD_STATUS_GET              0xA0
 123 #define I2O_CMD_SW_DOWNLOAD             0xA9
 124 #define I2O_CMD_SW_UPLOAD               0xAB
 125 #define I2O_CMD_SW_REMOVE               0xAD
 126 #define I2O_CMD_SYS_ENABLE              0xD1
 127 #define I2O_CMD_SYS_MODIFY              0xC1
 128 #define I2O_CMD_SYS_QUIESCE             0xC3
 129 #define I2O_CMD_SYS_TAB_SET             0xA3
 130
 131 /*
 132  * Utility Class
 133  */
 134 #define I2O_CMD_UTIL_NOP                0x00
 135 #define I2O_CMD_UTIL_ABORT              0x01
 136 #define I2O_CMD_UTIL_CLAIM              0x09
 137 #define I2O_CMD_UTIL_RELEASE            0x0B
 138 #define I2O_CMD_UTIL_PARAMS_GET         0x06
 139 #define I2O_CMD_UTIL_PARAMS_SET         0x05
 140 #define I2O_CMD_UTIL_EVT_REGISTER       0x13
 141 #define I2O_CMD_UTIL_EVT_ACK            0x14
 142 #define I2O_CMD_UTIL_CONFIG_DIALOG      0x10
 143 #define I2O_CMD_UTIL_DEVICE_RESERVE     0x0D
 144 #define I2O_CMD_UTIL_DEVICE_RELEASE     0x0F
 145 #define I2O_CMD_UTIL_LOCK               0x17
 146 #define I2O_CMD_UTIL_LOCK_RELEASE       0x19
 147 #define I2O_CMD_UTIL_REPLY_FAULT_NOTIFY 0x15
 148
 149 /*
 150  * SCSI Host Bus Adapter Class
 151  */
 152 #define I2O_CMD_SCSI_EXEC               0x81
 153 #define I2O_CMD_SCSI_ABORT              0x83
 154 #define I2O_CMD_SCSI_BUSRESET           0x27
 155
 156 /*
 157  * Bus Adapter Class
 158  */
 159 #define I2O_CMD_BUS_ADAPTER_RESET       0x85
 160 #define I2O_CMD_BUS_RESET               0x87
 161 #define I2O_CMD_BUS_SCAN                0x89
 162 #define I2O_CMD_BUS_QUIESCE             0x8b
 163
 164 /*
 165  * Random Block Storage Class
 166  */
 167 #define I2O_CMD_BLOCK_READ              0x30
 168 #define I2O_CMD_BLOCK_WRITE             0x31
 169 #define I2O_CMD_BLOCK_CFLUSH            0x37
 170 #define I2O_CMD_BLOCK_MLOCK             0x49
 171 #define I2O_CMD_BLOCK_MUNLOCK           0x4B
 172 #define I2O_CMD_BLOCK_MMOUNT            0x41
 173 #define I2O_CMD_BLOCK_MEJECT            0x43
 174 #define I2O_CMD_BLOCK_POWER             0x70
 175
 176 #define I2O_CMD_PRIVATE                 0xFF
 177
 178 /* Command status values  */
 179
 180 #define I2O_CMD_IN_PROGRESS     0x01
 181 #define I2O_CMD_REJECTED        0x02
 182 #define I2O_CMD_FAILED          0x03
 183 #define I2O_CMD_COMPLETED       0x04
 184
 185 /* I2O API function return values */
 186
 187 #define I2O_RTN_NO_ERROR                        0
 188 #define I2O_RTN_NOT_INIT                        1
 189 #define I2O_RTN_FREE_Q_EMPTY                    2
 190 #define I2O_RTN_TCB_ERROR                       3
 191 #define I2O_RTN_TRANSACTION_ERROR               4
 192 #define I2O_RTN_ADAPTER_ALREADY_INIT            5
 193 #define I2O_RTN_MALLOC_ERROR                    6
 194 #define I2O_RTN_ADPTR_NOT_REGISTERED            7
 195 #define I2O_RTN_MSG_REPLY_TIMEOUT               8
 196 #define I2O_RTN_NO_STATUS                       9
 197 #define I2O_RTN_NO_FIRM_VER                     10
 198 #define I2O_RTN_NO_LINK_SPEED                   11
 199
 200 /* Reply message status defines for all messages */
 201
 202 #define I2O_REPLY_STATUS_SUCCESS                        0x00
 203 #define I2O_REPLY_STATUS_ABORT_DIRTY                    0x01
 204 #define I2O_REPLY_STATUS_ABORT_NO_DATA_TRANSFER         0x02
 205 #define I2O_REPLY_STATUS_ABORT_PARTIAL_TRANSFER         0x03
 206 #define I2O_REPLY_STATUS_ERROR_DIRTY                    0x04
 207 #define I2O_REPLY_STATUS_ERROR_NO_DATA_TRANSFER         0x05
 208 #define I2O_REPLY_STATUS_ERROR_PARTIAL_TRANSFER         0x06
 209 #define I2O_REPLY_STATUS_PROCESS_ABORT_DIRTY            0x08
 210 #define I2O_REPLY_STATUS_PROCESS_ABORT_NO_DATA_TRANSFER 0x09
 211 #define I2O_REPLY_STATUS_PROCESS_ABORT_PARTIAL_TRANSFER 0x0A
 212 #define I2O_REPLY_STATUS_TRANSACTION_ERROR              0x0B
 213 #define I2O_REPLY_STATUS_PROGRESS_REPORT                0x80
 214
 215 /* Status codes and Error Information for Parameter functions */
 216
 217 #define I2O_PARAMS_STATUS_SUCCESS               0x00
 218 #define I2O_PARAMS_STATUS_BAD_KEY_ABORT         0x01
 219 #define I2O_PARAMS_STATUS_BAD_KEY_CONTINUE      0x02
 220 #define I2O_PARAMS_STATUS_BUFFER_FULL           0x03
 221 #define I2O_PARAMS_STATUS_BUFFER_TOO_SMALL      0x04
 222 #define I2O_PARAMS_STATUS_FIELD_UNREADABLE      0x05
 223 #define I2O_PARAMS_STATUS_FIELD_UNWRITEABLE     0x06
 224 #define I2O_PARAMS_STATUS_INSUFFICIENT_FIELDS   0x07
 225 #define I2O_PARAMS_STATUS_INVALID_GROUP_ID      0x08
 226 #define I2O_PARAMS_STATUS_INVALID_OPERATION     0x09
 227 #define I2O_PARAMS_STATUS_NO_KEY_FIELD          0x0A
 228 #define I2O_PARAMS_STATUS_NO_SUCH_FIELD         0x0B
 229 #define I2O_PARAMS_STATUS_NON_DYNAMIC_GROUP     0x0C
 230 #define I2O_PARAMS_STATUS_OPERATION_ERROR       0x0D
 231 #define I2O_PARAMS_STATUS_SCALAR_ERROR          0x0E
 232 #define I2O_PARAMS_STATUS_TABLE_ERROR           0x0F
 233 #define I2O_PARAMS_STATUS_WRONG_GROUP_TYPE      0x10
 234
 235 /* DetailedStatusCode defines for Executive, DDM, Util and Transaction error
 236  * messages: Table 3-2 Detailed Status Codes.*/
 237
 238 #define I2O_DSC_SUCCESS                        0x0000
 239 #define I2O_DSC_BAD_KEY                        0x0002
 240 #define I2O_DSC_TCL_ERROR                      0x0003
 241 #define I2O_DSC_REPLY_BUFFER_FULL              0x0004
 242 #define I2O_DSC_NO_SUCH_PAGE                   0x0005
 243 #define I2O_DSC_INSUFFICIENT_RESOURCE_SOFT     0x0006
 244 #define I2O_DSC_INSUFFICIENT_RESOURCE_HARD     0x0007
 245 #define I2O_DSC_CHAIN_BUFFER_TOO_LARGE         0x0009
 246 #define I2O_DSC_UNSUPPORTED_FUNCTION           0x000A
 247 #define I2O_DSC_DEVICE_LOCKED                  0x000B
 248 #define I2O_DSC_DEVICE_RESET                   0x000C
 249 #define I2O_DSC_INAPPROPRIATE_FUNCTION         0x000D
 250 #define I2O_DSC_INVALID_INITIATOR_ADDRESS      0x000E
 251 #define I2O_DSC_INVALID_MESSAGE_FLAGS          0x000F
 252 #define I2O_DSC_INVALID_OFFSET                 0x0010
 253 #define I2O_DSC_INVALID_PARAMETER              0x0011
 254 #define I2O_DSC_INVALID_REQUEST                0x0012
 255 #define I2O_DSC_INVALID_TARGET_ADDRESS         0x0013
 256 #define I2O_DSC_MESSAGE_TOO_LARGE              0x0014
 257 #define I2O_DSC_MESSAGE_TOO_SMALL              0x0015
 258 #define I2O_DSC_MISSING_PARAMETER              0x0016
 259 #define I2O_DSC_TIMEOUT                        0x0017
 260 #define I2O_DSC_UNKNOWN_ERROR                  0x0018
 261 #define I2O_DSC_UNKNOWN_FUNCTION               0x0019
 262 #define I2O_DSC_UNSUPPORTED_VERSION            0x001A
 263 #define I2O_DSC_DEVICE_BUSY                    0x001B
 264 #define I2O_DSC_DEVICE_NOT_AVAILABLE           0x001C
 265
 266 /* DetailedStatusCode defines for Block Storage Operation: Table 6-7 Detailed
 267    Status Codes.*/
 268
 269 #define I2O_BSA_DSC_SUCCESS               0x0000
 270 #define I2O_BSA_DSC_MEDIA_ERROR           0x0001
 271 #define I2O_BSA_DSC_ACCESS_ERROR          0x0002
 272 #define I2O_BSA_DSC_DEVICE_FAILURE        0x0003
 273 #define I2O_BSA_DSC_DEVICE_NOT_READY      0x0004
 274 #define I2O_BSA_DSC_MEDIA_NOT_PRESENT     0x0005
 275 #define I2O_BSA_DSC_MEDIA_LOCKED          0x0006
 276 #define I2O_BSA_DSC_MEDIA_FAILURE         0x0007
 277 #define I2O_BSA_DSC_PROTOCOL_FAILURE      0x0008
 278 #define I2O_BSA_DSC_BUS_FAILURE           0x0009
 279 #define I2O_BSA_DSC_ACCESS_VIOLATION      0x000A
 280 #define I2O_BSA_DSC_WRITE_PROTECTED       0x000B
 281 #define I2O_BSA_DSC_DEVICE_RESET          0x000C
 282 #define I2O_BSA_DSC_VOLUME_CHANGED        0x000D
 283 #define I2O_BSA_DSC_TIMEOUT               0x000E
 284
 285 /* FailureStatusCodes, Table 3-3 Message Failure Codes */
 286
 287 #define I2O_FSC_TRANSPORT_SERVICE_SUSPENDED             0x81
 288 #define I2O_FSC_TRANSPORT_SERVICE_TERMINATED            0x82
 289 #define I2O_FSC_TRANSPORT_CONGESTION                    0x83
 290 #define I2O_FSC_TRANSPORT_FAILURE                       0x84
 291 #define I2O_FSC_TRANSPORT_STATE_ERROR                   0x85
 292 #define I2O_FSC_TRANSPORT_TIME_OUT                      0x86
 293 #define I2O_FSC_TRANSPORT_ROUTING_FAILURE               0x87
 294 #define I2O_FSC_TRANSPORT_INVALID_VERSION               0x88
 295 #define I2O_FSC_TRANSPORT_INVALID_OFFSET                0x89
 296 #define I2O_FSC_TRANSPORT_INVALID_MSG_FLAGS             0x8A
 297 #define I2O_FSC_TRANSPORT_FRAME_TOO_SMALL               0x8B
 298 #define I2O_FSC_TRANSPORT_FRAME_TOO_LARGE               0x8C
 299 #define I2O_FSC_TRANSPORT_INVALID_TARGET_ID             0x8D
 300 #define I2O_FSC_TRANSPORT_INVALID_INITIATOR_ID          0x8E
 301 #define I2O_FSC_TRANSPORT_INVALID_INITIATOR_CONTEXT     0x8F
 302 #define I2O_FSC_TRANSPORT_UNKNOWN_FAILURE               0xFF
 303
 304 /* Device Claim Types */
 305 #define I2O_CLAIM_PRIMARY                                       0x01000000
 306 #define I2O_CLAIM_MANAGEMENT                                    0x02000000
 307 #define I2O_CLAIM_AUTHORIZED                                    0x03000000
 308 #define I2O_CLAIM_SECONDARY                                     0x04000000
 309
 310 /* Message header defines for VersionOffset */
 311 #define I2OVER15        0x0001
 312 #define I2OVER20        0x0002
 313
 314 /* Default is 1.5 */
 315 #define I2OVERSION      I2OVER15
 316
 317 #define SGL_OFFSET_0    I2OVERSION
 318 #define SGL_OFFSET_4    (0x0040 | I2OVERSION)
 319 #define SGL_OFFSET_5    (0x0050 | I2OVERSION)
 320 #define SGL_OFFSET_6    (0x0060 | I2OVERSION)
 321 #define SGL_OFFSET_7    (0x0070 | I2OVERSION)
 322 #define SGL_OFFSET_8    (0x0080 | I2OVERSION)
 323 #define SGL_OFFSET_9    (0x0090 | I2OVERSION)
 324 #define SGL_OFFSET_10   (0x00A0 | I2OVERSION)
 325 #define SGL_OFFSET_11   (0x00B0 | I2OVERSION)
 326 #define SGL_OFFSET_12   (0x00C0 | I2OVERSION)
 327 #define SGL_OFFSET(x)   (((x)<<4) | I2OVERSION)
 328
 329 /* Transaction Reply Lists (TRL) Control Word structure */
 330 #define TRL_SINGLE_FIXED_LENGTH         0x00
 331 #define TRL_SINGLE_VARIABLE_LENGTH      0x40
 332 #define TRL_MULTIPLE_FIXED_LENGTH       0x80
 333
 334  /* msg header defines for MsgFlags */
 335 #define MSG_STATIC      0x0100
 336 #define MSG_64BIT_CNTXT 0x0200
 337 #define MSG_MULTI_TRANS 0x1000
 338 #define MSG_FAIL        0x2000
 339 #define MSG_FINAL       0x4000
 340 #define MSG_REPLY       0x8000
 341
 342  /* minimum size msg */
 343 #define THREE_WORD_MSG_SIZE     0x00030000
 344 #define FOUR_WORD_MSG_SIZE      0x00040000
 345 #define FIVE_WORD_MSG_SIZE      0x00050000
 346 #define SIX_WORD_MSG_SIZE       0x00060000
 347 #define SEVEN_WORD_MSG_SIZE     0x00070000
 348 #define EIGHT_WORD_MSG_SIZE     0x00080000
 349 #define NINE_WORD_MSG_SIZE      0x00090000
 350 #define TEN_WORD_MSG_SIZE       0x000A0000
 351 #define ELEVEN_WORD_MSG_SIZE    0x000B0000
 352 #define I2O_MESSAGE_SIZE(x)     ((x)<<16)
 353
 354 /* special TID assignments */
 355 #define ADAPTER_TID             0
 356 #define HOST_TID                1
 357
 358 /* outbound queue defines */
 359 #define I2O_MAX_OUTBOUND_MSG_FRAMES     128
 360 #define I2O_OUTBOUND_MSG_FRAME_SIZE     128     /* in 32-bit words */
 361
 362 /* inbound queue definitions */
 363 #define I2O_MSG_INPOOL_MIN              32
 364 #define I2O_INBOUND_MSG_FRAME_SIZE      128     /* in 32-bit words */
 365
 366 #define I2O_POST_WAIT_OK        0
 367 #define I2O_POST_WAIT_TIMEOUT   -ETIMEDOUT
 368
 369 #define I2O_CONTEXT_LIST_MIN_LENGTH     15
 370 #define I2O_CONTEXT_LIST_USED           0x01
 371 #define I2O_CONTEXT_LIST_DELETED        0x02
 372
 373 /* timeouts */
 374 #define I2O_TIMEOUT_INIT_OUTBOUND_QUEUE 15
 375 #define I2O_TIMEOUT_MESSAGE_GET         5
 376 #define I2O_TIMEOUT_RESET               30
 377 #define I2O_TIMEOUT_STATUS_GET          5
 378 #define I2O_TIMEOUT_LCT_GET             360
 379 #define I2O_TIMEOUT_SCSI_SCB_ABORT      240
 380
 381 /* retries */
 382 #define I2O_HRT_GET_TRIES               3
 383 #define I2O_LCT_GET_TRIES               3
 384
 385 /* defines for max_sectors and max_phys_segments */
 386 #define I2O_MAX_SECTORS                 1024
 387 #define I2O_MAX_SECTORS_LIMITED         128
 388 #define I2O_MAX_PHYS_SEGMENTS           BLK_MAX_SEGMENTS
 389
 390 /*
 391  *      Message structures
 392  */
 393 struct i2o_message {
 394         union {
 395                 struct {
 396                         u8 version_offset;
 397                         u8 flags;
 398                         u16 size;
 399                         u32 target_tid:12;
 400                         u32 init_tid:12;
 401                         u32 function:8;
 402                         u32 icntxt;     /* initiator context */
 403                         u32 tcntxt;     /* transaction context */
 404                 } s;
 405                 u32 head[4];
 406         } u;
 407         /* List follows */
 408         u32 body[0];
 409 };
 410
 411 /* MFA and I2O message used by mempool */
 412 struct i2o_msg_mfa {
 413         u32 mfa;                /* MFA returned by the controller */
 414         struct i2o_message msg; /* I2O message */
 415 };
 416
 417 /*
 418  *      Each I2O device entity has one of these. There is one per device.
 419  */
 420 struct i2o_device {
 421         i2o_lct_entry lct_data; /* Device LCT information */
 422
 423         struct i2o_controller *iop;     /* Controlling IOP */
 424         struct list_head list;  /* node in IOP devices list */
 425
 426         struct device device;
 427
 428         struct mutex lock;      /* device lock */
 429 };
 430
 431 /*
 432  *      Event structure provided to the event handling function
 433  */
 434 struct i2o_event {
 435         struct work_struct work;
 436         struct i2o_device *i2o_dev;     /* I2O device pointer from which the
 437                                            event reply was initiated */
 438         u16 size;               /* Size of data in 32-bit words */
 439         u32 tcntxt;             /* Transaction context used at
 440                                    registration */
 441         u32 event_indicator;    /* Event indicator from reply */
 442         u32 data[0];            /* Event data from reply */
 443 };
 444
 445 /*
 446  *      I2O classes which could be handled by the OSM
 447  */
 448 struct i2o_class_id {
 449         u16 class_id:12;
 450 };
 451
 452 /*
 453  *      I2O driver structure for OSMs
 454  */
 455 struct i2o_driver {
 456         char *name;             /* OSM name */
 457         int context;            /* Low 8 bits of the transaction info */
 458         struct i2o_class_id *classes;   /* I2O classes that this OSM handles */
 459
 460         /* Message reply handler */
 461         int (*reply) (struct i2o_controller *, u32, struct i2o_message *);
 462
 463         /* Event handler */
 464         work_func_t event;
 465
 466         struct workqueue_struct *event_queue;   /* Event queue */
 467
 468         struct device_driver driver;
 469
 470         /* notification of changes */
 471         void (*notify_controller_add) (struct i2o_controller *);
 472         void (*notify_controller_remove) (struct i2o_controller *);
 473         void (*notify_device_add) (struct i2o_device *);
 474         void (*notify_device_remove) (struct i2o_device *);
 475
 476         struct semaphore lock;
 477 };
 478
 479 /*
 480  *      Contains DMA mapped address information
 481  */
 482 struct i2o_dma {
 483         void *virt;
 484         dma_addr_t phys;
 485         size_t len;
 486 };
 487
 488 /*
 489  *      Contains slab cache and mempool information
 490  */
 491 struct i2o_pool {
 492         char *name;
 493         struct kmem_cache *slab;
 494         mempool_t *mempool;
 495 };
 496
 497 /*
 498  *      Contains IO mapped address information
 499  */
 500 struct i2o_io {
 501         void __iomem *virt;
 502         unsigned long phys;
 503         unsigned long len;
 504 };
 505
 506 /*
 507  *      Context queue entry, used for 32-bit context on 64-bit systems
 508  */
 509 struct i2o_context_list_element {
 510         struct list_head list;
 511         u32 context;
 512         void *ptr;
 513         unsigned long timestamp;
 514 };
 515
 516 /*
 517  * Each I2O controller has one of these objects
 518  */
 519 struct i2o_controller {
 520         char name[16];
 521         int unit;
 522         int type;
 523
 524         struct pci_dev *pdev;   /* PCI device */
 525
 526         unsigned int promise:1; /* Promise controller */
 527         unsigned int adaptec:1; /* DPT / Adaptec controller */
 528         unsigned int raptor:1;  /* split bar */
 529         unsigned int no_quiesce:1;      /* dont quiesce before reset */
 530         unsigned int short_req:1;       /* use small block sizes */
 531         unsigned int limit_sectors:1;   /* limit number of sectors / request */
 532         unsigned int pae_support:1;     /* controller has 64-bit SGL support */
 533
 534         struct list_head devices;       /* list of I2O devices */
 535         struct list_head list;  /* Controller list */
 536
 537         void __iomem *in_port;  /* Inbout port address */
 538         void __iomem *out_port; /* Outbound port address */
 539         void __iomem *irq_status;       /* Interrupt status register address */
 540         void __iomem *irq_mask; /* Interrupt mask register address */
 541
 542         struct i2o_dma status;  /* IOP status block */
 543
 544         struct i2o_dma hrt;     /* HW Resource Table */
 545         i2o_lct *lct;           /* Logical Config Table */
 546         struct i2o_dma dlct;    /* Temp LCT */
 547         struct mutex lct_lock;  /* Lock for LCT updates */
 548         struct i2o_dma status_block;    /* IOP status block */
 549
 550         struct i2o_io base;     /* controller messaging unit */
 551         struct i2o_io in_queue; /* inbound message queue Host->IOP */
 552         struct i2o_dma out_queue;       /* outbound message queue IOP->Host */
 553
 554         struct i2o_pool in_msg; /* mempool for inbound messages */
 555
 556         unsigned int battery:1; /* Has a battery backup */
 557         unsigned int io_alloc:1;        /* An I/O resource was allocated */
 558         unsigned int mem_alloc:1;       /* A memory resource was allocated */
 559
 560         struct resource io_resource;    /* I/O resource allocated to the IOP */
 561         struct resource mem_resource;   /* Mem resource allocated to the IOP */
 562
 563         struct device device;
 564         struct i2o_device *exec;        /* Executive */
 565 #if BITS_PER_LONG == 64
 566         spinlock_t context_list_lock;   /* lock for context_list */
 567         atomic_t context_list_counter;  /* needed for unique contexts */
 568         struct list_head context_list;  /* list of context id's
 569                                            and pointers */
 570 #endif
 571         spinlock_t lock;        /* lock for controller
 572                                    configuration */
 573         void *driver_data[I2O_MAX_DRIVERS];     /* storage for drivers */
 574 };
 575
 576 /*
 577  * I2O System table entry
 578  *
 579  * The system table contains information about all the IOPs in the
 580  * system.  It is sent to all IOPs so that they can create peer2peer
 581  * connections between them.
 582  */
 583 struct i2o_sys_tbl_entry {
 584         u16 org_id;
 585         u16 reserved1;
 586         u32 iop_id:12;
 587         u32 reserved2:20;
 588         u16 seg_num:12;
 589         u16 i2o_version:4;
 590         u8 iop_state;
 591         u8 msg_type;
 592         u16 frame_size;
 593         u16 reserved3;
 594         u32 last_changed;
 595         u32 iop_capabilities;
 596         u32 inbound_low;
 597         u32 inbound_high;
 598 };
 599
 600 struct i2o_sys_tbl {
 601         u8 num_entries;
 602         u8 version;
 603         u16 reserved1;
 604         u32 change_ind;
 605         u32 reserved2;
 606         u32 reserved3;
 607         struct i2o_sys_tbl_entry iops[0];
 608 };
 609
 610 extern struct list_head i2o_controllers;
 611
 612 /* Message functions */
 613 extern struct i2o_message *i2o_msg_get_wait(struct i2o_controller *, int);
 614 extern int i2o_msg_post_wait_mem(struct i2o_controller *, struct i2o_message *,
 615                                  unsigned long, struct i2o_dma *);
 616
 617 /* IOP functions */
 618 extern int i2o_status_get(struct i2o_controller *);
 619
 620 extern int i2o_event_register(struct i2o_device *, struct i2o_driver *, int,
 621                               u32);
 622 extern struct i2o_device *i2o_iop_find_device(struct i2o_controller *, u16);
 623 extern struct i2o_controller *i2o_find_iop(int);
 624
 625 /* Functions needed for handling 64-bit pointers in 32-bit context */
 626 #if BITS_PER_LONG == 64
 627 extern u32 i2o_cntxt_list_add(struct i2o_controller *, void *);
 628 extern void *i2o_cntxt_list_get(struct i2o_controller *, u32);
 629 extern u32 i2o_cntxt_list_remove(struct i2o_controller *, void *);
 630 extern u32 i2o_cntxt_list_get_ptr(struct i2o_controller *, void *);
 631
 632 static inline u32 i2o_ptr_low(void *ptr)
 633 {
 634         return (u32) (u64) ptr;
 635 };
 636
 637 static inline u32 i2o_ptr_high(void *ptr)
 638 {
 639         return (u32) ((u64) ptr >> 32);
 640 };
 641
 642 static inline u32 i2o_dma_low(dma_addr_t dma_addr)
 643 {
 644         return (u32) (u64) dma_addr;
 645 };
 646
 647 static inline u32 i2o_dma_high(dma_addr_t dma_addr)
 648 {
 649         return (u32) ((u64) dma_addr >> 32);
 650 };
 651 #else
 652 static inline u32 i2o_cntxt_list_add(struct i2o_controller *c, void *ptr)
 653 {
 654         return (u32) ptr;
 655 };
 656
 657 static inline void *i2o_cntxt_list_get(struct i2o_controller *c, u32 context)
 658 {
 659         return (void *)context;
 660 };
 661
 662 static inline u32 i2o_cntxt_list_remove(struct i2o_controller *c, void *ptr)
 663 {
 664         return (u32) ptr;
 665 };
 666
 667 static inline u32 i2o_cntxt_list_get_ptr(struct i2o_controller *c, void *ptr)
 668 {
 669         return (u32) ptr;
 670 };
 671
 672 static inline u32 i2o_ptr_low(void *ptr)
 673 {
 674         return (u32) ptr;
 675 };
 676
 677 static inline u32 i2o_ptr_high(void *ptr)
 678 {
 679         return 0;
 680 };
 681
 682 static inline u32 i2o_dma_low(dma_addr_t dma_addr)
 683 {
 684         return (u32) dma_addr;
 685 };
 686
 687 static inline u32 i2o_dma_high(dma_addr_t dma_addr)
 688 {
 689         return 0;
 690 };
 691 #endif
 692
 693 extern u16 i2o_sg_tablesize(struct i2o_controller *c, u16 body_size);
 694 extern dma_addr_t i2o_dma_map_single(struct i2o_controller *c, void *ptr,
 695                                             size_t size,
 696                                             enum dma_data_direction direction,
 697                                             u32 ** sg_ptr);
 698 extern int i2o_dma_map_sg(struct i2o_controller *c,
 699                                  struct scatterlist *sg, int sg_count,
 700                                  enum dma_data_direction direction,
 701                                  u32 ** sg_ptr);
 702 extern int i2o_dma_alloc(struct device *dev, struct i2o_dma *addr, size_t len);
 703 extern void i2o_dma_free(struct device *dev, struct i2o_dma *addr);
 704 extern int i2o_dma_realloc(struct device *dev, struct i2o_dma *addr,
 705                                                                 size_t len);
 706 extern int i2o_pool_alloc(struct i2o_pool *pool, const char *name,
 707                                  size_t size, int min_nr);
 708 extern void i2o_pool_free(struct i2o_pool *pool);
 709 /* I2O driver (OSM) functions */
 710 extern int i2o_driver_register(struct i2o_driver *);
 711 extern void i2o_driver_unregister(struct i2o_driver *);
 712
 713 /**
 714  *      i2o_driver_notify_controller_add - Send notification of added controller
 715  *      @drv: I2O driver
 716  *      @c: I2O controller
 717  *
 718  *      Send notification of added controller to a single registered driver.
 719  */
 720 static inline void i2o_driver_notify_controller_add(struct i2o_driver *drv,
 721                                                     struct i2o_controller *c)
 722 {
 723         if (drv->notify_controller_add)
 724                 drv->notify_controller_add(c);
 725 };
 726
 727 /**
 728  *      i2o_driver_notify_controller_remove - Send notification of removed controller
 729  *      @drv: I2O driver
 730  *      @c: I2O controller
 731  *
 732  *      Send notification of removed controller to a single registered driver.
 733  */
 734 static inline void i2o_driver_notify_controller_remove(struct i2o_driver *drv,
 735                                                        struct i2o_controller *c)
 736 {
 737         if (drv->notify_controller_remove)
 738                 drv->notify_controller_remove(c);
 739 };
 740
 741 /**
 742  *      i2o_driver_notify_device_add - Send notification of added device
 743  *      @drv: I2O driver
 744  *      @i2o_dev: the added i2o_device
 745  *
 746  *      Send notification of added device to a single registered driver.
 747  */
 748 static inline void i2o_driver_notify_device_add(struct i2o_driver *drv,
 749                                                 struct i2o_device *i2o_dev)
 750 {
 751         if (drv->notify_device_add)
 752                 drv->notify_device_add(i2o_dev);
 753 };
 754
 755 /**
 756  *      i2o_driver_notify_device_remove - Send notification of removed device
 757  *      @drv: I2O driver
 758  *      @i2o_dev: the added i2o_device
 759  *
 760  *      Send notification of removed device to a single registered driver.
 761  */
 762 static inline void i2o_driver_notify_device_remove(struct i2o_driver *drv,
 763                                                    struct i2o_device *i2o_dev)
 764 {
 765         if (drv->notify_device_remove)
 766                 drv->notify_device_remove(i2o_dev);
 767 };
 768
 769 extern void i2o_driver_notify_controller_add_all(struct i2o_controller *);
 770 extern void i2o_driver_notify_controller_remove_all(struct i2o_controller *);
 771 extern void i2o_driver_notify_device_add_all(struct i2o_device *);
 772 extern void i2o_driver_notify_device_remove_all(struct i2o_device *);
 773
 774 /* I2O device functions */
 775 extern int i2o_device_claim(struct i2o_device *);
 776 extern int i2o_device_claim_release(struct i2o_device *);
 777
 778 /* Exec OSM functions */
 779 extern int i2o_exec_lct_get(struct i2o_controller *);
 780
 781 /* device / driver / kobject conversion functions */
 782 #define to_i2o_driver(drv) container_of(drv,struct i2o_driver, driver)
 783 #define to_i2o_device(dev) container_of(dev, struct i2o_device, device)
 784 #define to_i2o_controller(dev) container_of(dev, struct i2o_controller, device)
 785
 786 /**
 787  *      i2o_out_to_virt - Turn an I2O message to a virtual address
 788  *      @c: controller
 789  *      @m: message engine value
 790  *
 791  *      Turn a receive message from an I2O controller bus address into
 792  *      a Linux virtual address. The shared page frame is a linear block
 793  *      so we simply have to shift the offset. This function does not
 794  *      work for sender side messages as they are ioremap objects
 795  *      provided by the I2O controller.
 796  */
 797 static inline struct i2o_message *i2o_msg_out_to_virt(struct i2o_controller *c,
 798                                                       u32 m)
 799 {
 800         BUG_ON(m < c->out_queue.phys
 801                || m >= c->out_queue.phys + c->out_queue.len);
 802
 803         return c->out_queue.virt + (m - c->out_queue.phys);
 804 };
 805
 806 /**
 807  *      i2o_msg_in_to_virt - Turn an I2O message to a virtual address
 808  *      @c: controller
 809  *      @m: message engine value
 810  *
 811  *      Turn a send message from an I2O controller bus address into
 812  *      a Linux virtual address. The shared page frame is a linear block
 813  *      so we simply have to shift the offset. This function does not
 814  *      work for receive side messages as they are kmalloc objects
 815  *      in a different pool.
 816  */
 817 static inline struct i2o_message __iomem *i2o_msg_in_to_virt(struct
 818                                                              i2o_controller *c,
 819                                                              u32 m)
 820 {
 821         return c->in_queue.virt + m;
 822 };
 823
 824 /**
 825  *      i2o_msg_get - obtain an I2O message from the IOP
 826  *      @c: I2O controller
 827  *
 828  *      This function tries to get a message frame. If no message frame is
 829  *      available do not wait until one is availabe (see also i2o_msg_get_wait).
 830  *      The returned pointer to the message frame is not in I/O memory, it is
 831  *      allocated from a mempool. But because a MFA is allocated from the
 832  *      controller too it is guaranteed that i2o_msg_post() will never fail.
 833  *
 834  *      On a success a pointer to the message frame is returned. If the message
 835  *      queue is empty -EBUSY is returned and if no memory is available -ENOMEM
 836  *      is returned.
 837  */
 838 static inline struct i2o_message *i2o_msg_get(struct i2o_controller *c)
 839 {
 840         struct i2o_msg_mfa *mmsg = mempool_alloc(c->in_msg.mempool, GFP_ATOMIC);
 841         if (!mmsg)
 842                 return ERR_PTR(-ENOMEM);
 843
 844         mmsg->mfa = readl(c->in_port);
 845         if (unlikely(mmsg->mfa >= c->in_queue.len)) {
 846                 u32 mfa = mmsg->mfa;
 847
 848                 mempool_free(mmsg, c->in_msg.mempool);
 849
 850                 if (mfa == I2O_QUEUE_EMPTY)
 851                         return ERR_PTR(-EBUSY);
 852                 return ERR_PTR(-EFAULT);
 853         }
 854
 855         return &mmsg->msg;
 856 };
 857
 858 /**
 859  *      i2o_msg_post - Post I2O message to I2O controller
 860  *      @c: I2O controller to which the message should be send
 861  *      @msg: message returned by i2o_msg_get()
 862  *
 863  *      Post the message to the I2O controller and return immediately.
 864  */
 865 static inline void i2o_msg_post(struct i2o_controller *c,
 866                                 struct i2o_message *msg)
 867 {
 868         struct i2o_msg_mfa *mmsg;
 869
 870         mmsg = container_of(msg, struct i2o_msg_mfa, msg);
 871         memcpy_toio(i2o_msg_in_to_virt(c, mmsg->mfa), msg,
 872                     (le32_to_cpu(msg->u.head[0]) >> 16) << 2);
 873         writel(mmsg->mfa, c->in_port);
 874         mempool_free(mmsg, c->in_msg.mempool);
 875 };
 876
 877 /**
 878  *      i2o_msg_post_wait - Post and wait a message and wait until return
 879  *      @c: controller
 880  *      @msg: message to post
 881  *      @timeout: time in seconds to wait
 882  *
 883  *      This API allows an OSM to post a message and then be told whether or
 884  *      not the system received a successful reply. If the message times out
 885  *      then the value '-ETIMEDOUT' is returned.
 886  *
 887  *      Returns 0 on success or negative error code on failure.
 888  */
 889 static inline int i2o_msg_post_wait(struct i2o_controller *c,
 890                                     struct i2o_message *msg,
 891                                     unsigned long timeout)
 892 {
 893         return i2o_msg_post_wait_mem(c, msg, timeout, NULL);
 894 };
 895
 896 /**
 897  *      i2o_msg_nop_mfa - Returns a fetched MFA back to the controller
 898  *      @c: I2O controller from which the MFA was fetched
 899  *      @mfa: MFA which should be returned
 900  *
 901  *      This function must be used for preserved messages, because i2o_msg_nop()
 902  *      also returns the allocated memory back to the msg_pool mempool.
 903  */
 904 static inline void i2o_msg_nop_mfa(struct i2o_controller *c, u32 mfa)
 905 {
 906         struct i2o_message __iomem *msg;
 907         u32 nop[3] = {
 908                 THREE_WORD_MSG_SIZE | SGL_OFFSET_0,
 909                 I2O_CMD_UTIL_NOP << 24 | HOST_TID << 12 | ADAPTER_TID,
 910                 0x00000000
 911         };
 912
 913         msg = i2o_msg_in_to_virt(c, mfa);
 914         memcpy_toio(msg, nop, sizeof(nop));
 915         writel(mfa, c->in_port);
 916 };
 917
 918 /**
 919  *      i2o_msg_nop - Returns a message which is not used
 920  *      @c: I2O controller from which the message was created
 921  *      @msg: message which should be returned
 922  *
 923  *      If you fetch a message via i2o_msg_get, and can't use it, you must
 924  *      return the message with this function. Otherwise the MFA is lost as well
 925  *      as the allocated memory from the mempool.
 926  */
 927 static inline void i2o_msg_nop(struct i2o_controller *c,
 928                                struct i2o_message *msg)
 929 {
 930         struct i2o_msg_mfa *mmsg;
 931         mmsg = container_of(msg, struct i2o_msg_mfa, msg);
 932
 933         i2o_msg_nop_mfa(c, mmsg->mfa);
 934         mempool_free(mmsg, c->in_msg.mempool);
 935 };
 936
 937 /**
 938  *      i2o_flush_reply - Flush reply from I2O controller
 939  *      @c: I2O controller
 940  *      @m: the message identifier
 941  *
 942  *      The I2O controller must be informed that the reply message is not needed
 943  *      anymore. If you forget to flush the reply, the message frame can't be
 944  *      used by the controller anymore and is therefore lost.
 945  */
 946 static inline void i2o_flush_reply(struct i2o_controller *c, u32 m)
 947 {
 948         writel(m, c->out_port);
 949 };
 950
 951 /*
 952  *      Endian handling wrapped into the macro - keeps the core code
 953  *      cleaner.
 954  */
 955
 956 #define i2o_raw_writel(val, mem)        __raw_writel(cpu_to_le32(val), mem)
 957
 958 extern int i2o_parm_field_get(struct i2o_device *, int, int, void *, int);
 959 extern int i2o_parm_table_get(struct i2o_device *, int, int, int, void *, int,
 960                               void *, int);
 961
 962 /* debugging and troubleshooting/diagnostic helpers. */
 963 #define osm_printk(level, format, arg...)  \
 964         printk(level "%s: " format, OSM_NAME , ## arg)
 965
 966 #ifdef DEBUG
 967 #define osm_debug(format, arg...) \
 968         osm_printk(KERN_DEBUG, format , ## arg)
 969 #else
 970 #define osm_debug(format, arg...) \
 971         do { } while (0)
 972 #endif
 973
 974 #define osm_err(format, arg...)         \
 975         osm_printk(KERN_ERR, format , ## arg)
 976 #define osm_info(format, arg...)                \
 977         osm_printk(KERN_INFO, format , ## arg)
 978 #define osm_warn(format, arg...)                \
 979         osm_printk(KERN_WARNING, format , ## arg)
 980
 981 /* debugging functions */
 982 extern void i2o_report_status(const char *, const char *, struct i2o_message *);
 983 extern void i2o_dump_message(struct i2o_message *);
 984 extern void i2o_dump_hrt(struct i2o_controller *c);
 985 extern void i2o_debug_state(struct i2o_controller *c);
 986
 987 #endif                          /* _I2O_H */