drivers/ieee1394/sbp2.h

   1 /*
   2  * sbp2.h - Defines and prototypes for sbp2.c
   3  *
   4  * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
   5  * jamesg@filanet.com
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software Foundation,
  19  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21
  22 #ifndef SBP2_H
  23 #define SBP2_H
  24
  25 #define SBP2_DEVICE_NAME                "sbp2"
  26
  27 /*
  28  * SBP2 specific structures and defines
  29  */
  30
  31 #define ORB_DIRECTION_WRITE_TO_MEDIA    0x0
  32 #define ORB_DIRECTION_READ_FROM_MEDIA   0x1
  33 #define ORB_DIRECTION_NO_DATA_TRANSFER  0x2
  34
  35 #define ORB_SET_NULL_PTR(value)                 ((value & 0x1) << 31)
  36 #define ORB_SET_NOTIFY(value)                   ((value & 0x1) << 31)
  37 #define ORB_SET_RQ_FMT(value)                   ((value & 0x3) << 29)   /* unused ? */
  38 #define ORB_SET_NODE_ID(value)                  ((value & 0xffff) << 16)
  39 #define ORB_SET_STATUS_FIFO_HI(value, id)       (value >> 32 | ORB_SET_NODE_ID(id))
  40 #define ORB_SET_STATUS_FIFO_LO(value)           (value & 0xffffffff)
  41 #define ORB_SET_DATA_SIZE(value)                (value & 0xffff)
  42 #define ORB_SET_PAGE_SIZE(value)                ((value & 0x7) << 16)
  43 #define ORB_SET_PAGE_TABLE_PRESENT(value)       ((value & 0x1) << 19)
  44 #define ORB_SET_MAX_PAYLOAD(value)              ((value & 0xf) << 20)
  45 #define ORB_SET_SPEED(value)                    ((value & 0x7) << 24)
  46 #define ORB_SET_DIRECTION(value)                ((value & 0x1) << 27)
  47
  48 struct sbp2_command_orb {
  49         volatile u32 next_ORB_hi;
  50         volatile u32 next_ORB_lo;
  51         u32 data_descriptor_hi;
  52         u32 data_descriptor_lo;
  53         u32 misc;
  54         u8 cdb[12];
  55 };
  56
  57 #define SBP2_LOGIN_REQUEST              0x0
  58 #define SBP2_QUERY_LOGINS_REQUEST       0x1
  59 #define SBP2_RECONNECT_REQUEST          0x3
  60 #define SBP2_SET_PASSWORD_REQUEST       0x4
  61 #define SBP2_LOGOUT_REQUEST             0x7
  62 #define SBP2_ABORT_TASK_REQUEST         0xb
  63 #define SBP2_ABORT_TASK_SET             0xc
  64 #define SBP2_LOGICAL_UNIT_RESET         0xe
  65 #define SBP2_TARGET_RESET_REQUEST       0xf
  66
  67 #define ORB_SET_LUN(value)                      (value & 0xffff)
  68 #define ORB_SET_FUNCTION(value)                 ((value & 0xf) << 16)
  69 #define ORB_SET_RECONNECT(value)                ((value & 0xf) << 20)
  70 #define ORB_SET_EXCLUSIVE(value)                ((value & 0x1) << 28)
  71 #define ORB_SET_LOGIN_RESP_LENGTH(value)        (value & 0xffff)
  72 #define ORB_SET_PASSWD_LENGTH(value)            ((value & 0xffff) << 16)
  73
  74 struct sbp2_login_orb {
  75         u32 password_hi;
  76         u32 password_lo;
  77         u32 login_response_hi;
  78         u32 login_response_lo;
  79         u32 lun_misc;
  80         u32 passwd_resp_lengths;
  81         u32 status_fifo_hi;
  82         u32 status_fifo_lo;
  83 };
  84
  85 #define RESPONSE_GET_LOGIN_ID(value)            (value & 0xffff)
  86 #define RESPONSE_GET_LENGTH(value)              ((value >> 16) & 0xffff)
  87 #define RESPONSE_GET_RECONNECT_HOLD(value)      (value & 0xffff)
  88
  89 struct sbp2_login_response {
  90         u32 length_login_ID;
  91         u32 command_block_agent_hi;
  92         u32 command_block_agent_lo;
  93         u32 reconnect_hold;
  94 };
  95
  96 #define ORB_SET_LOGIN_ID(value)                 (value & 0xffff)
  97
  98 #define ORB_SET_QUERY_LOGINS_RESP_LENGTH(value) (value & 0xffff)
  99
 100 struct sbp2_query_logins_orb {
 101         u32 reserved1;
 102         u32 reserved2;
 103         u32 query_response_hi;
 104         u32 query_response_lo;
 105         u32 lun_misc;
 106         u32 reserved_resp_length;
 107         u32 status_fifo_hi;
 108         u32 status_fifo_lo;
 109 };
 110
 111 #define RESPONSE_GET_MAX_LOGINS(value)          (value & 0xffff)
 112 #define RESPONSE_GET_ACTIVE_LOGINS(value)       ((RESPONSE_GET_LENGTH(value) - 4) / 12)
 113
 114 struct sbp2_query_logins_response {
 115         u32 length_max_logins;
 116         u32 misc_IDs;
 117         u32 initiator_misc_hi;
 118         u32 initiator_misc_lo;
 119 };
 120
 121 struct sbp2_reconnect_orb {
 122         u32 reserved1;
 123         u32 reserved2;
 124         u32 reserved3;
 125         u32 reserved4;
 126         u32 login_ID_misc;
 127         u32 reserved5;
 128         u32 status_fifo_hi;
 129         u32 status_fifo_lo;
 130 };
 131
 132 struct sbp2_logout_orb {
 133         u32 reserved1;
 134         u32 reserved2;
 135         u32 reserved3;
 136         u32 reserved4;
 137         u32 login_ID_misc;
 138         u32 reserved5;
 139         u32 status_fifo_hi;
 140         u32 status_fifo_lo;
 141 };
 142
 143 #define PAGE_TABLE_SET_SEGMENT_BASE_HI(value)   (value & 0xffff)
 144 #define PAGE_TABLE_SET_SEGMENT_LENGTH(value)    ((value & 0xffff) << 16)
 145
 146 struct sbp2_unrestricted_page_table {
 147         u32 length_segment_base_hi;
 148         u32 segment_base_lo;
 149 };
 150
 151 #define RESP_STATUS_REQUEST_COMPLETE            0x0
 152 #define RESP_STATUS_TRANSPORT_FAILURE           0x1
 153 #define RESP_STATUS_ILLEGAL_REQUEST             0x2
 154 #define RESP_STATUS_VENDOR_DEPENDENT            0x3
 155
 156 #define SBP2_STATUS_NO_ADDITIONAL_INFO          0x0
 157 #define SBP2_STATUS_REQ_TYPE_NOT_SUPPORTED      0x1
 158 #define SBP2_STATUS_SPEED_NOT_SUPPORTED         0x2
 159 #define SBP2_STATUS_PAGE_SIZE_NOT_SUPPORTED     0x3
 160 #define SBP2_STATUS_ACCESS_DENIED               0x4
 161 #define SBP2_STATUS_LU_NOT_SUPPORTED            0x5
 162 #define SBP2_STATUS_MAX_PAYLOAD_TOO_SMALL       0x6
 163 #define SBP2_STATUS_RESOURCES_UNAVAILABLE       0x8
 164 #define SBP2_STATUS_FUNCTION_REJECTED           0x9
 165 #define SBP2_STATUS_LOGIN_ID_NOT_RECOGNIZED     0xa
 166 #define SBP2_STATUS_DUMMY_ORB_COMPLETED         0xb
 167 #define SBP2_STATUS_REQUEST_ABORTED             0xc
 168 #define SBP2_STATUS_UNSPECIFIED_ERROR           0xff
 169
 170 #define SFMT_CURRENT_ERROR                      0x0
 171 #define SFMT_DEFERRED_ERROR                     0x1
 172 #define SFMT_VENDOR_DEPENDENT_STATUS            0x3
 173
 174 #define SBP2_SCSI_STATUS_GOOD                   0x0
 175 #define SBP2_SCSI_STATUS_CHECK_CONDITION        0x2
 176 #define SBP2_SCSI_STATUS_CONDITION_MET          0x4
 177 #define SBP2_SCSI_STATUS_BUSY                   0x8
 178 #define SBP2_SCSI_STATUS_RESERVATION_CONFLICT   0x18
 179 #define SBP2_SCSI_STATUS_COMMAND_TERMINATED     0x22
 180
 181 #define SBP2_SCSI_STATUS_SELECTION_TIMEOUT      0xff
 182
 183 #define STATUS_GET_ORB_OFFSET_HI(value)         (value & 0xffff)
 184 #define STATUS_GET_SBP_STATUS(value)            ((value >> 16) & 0xff)
 185 #define STATUS_GET_LENGTH(value)                ((value >> 24) & 0x7)
 186 #define STATUS_GET_DEAD_BIT(value)              ((value >> 27) & 0x1)
 187 #define STATUS_GET_RESP(value)                  ((value >> 28) & 0x3)
 188 #define STATUS_GET_SRC(value)                   ((value >> 30) & 0x3)
 189
 190 struct sbp2_status_block {
 191         u32 ORB_offset_hi_misc;
 192         u32 ORB_offset_lo;
 193         u8 command_set_dependent[24];
 194 };
 195
 196 /*
 197  * Miscellaneous SBP2 related config rom defines
 198  */
 199
 200 #define SBP2_UNIT_DIRECTORY_OFFSET_KEY                          0xd1
 201 #define SBP2_CSR_OFFSET_KEY                                     0x54
 202 #define SBP2_UNIT_SPEC_ID_KEY                                   0x12
 203 #define SBP2_UNIT_SW_VERSION_KEY                                0x13
 204 #define SBP2_COMMAND_SET_SPEC_ID_KEY                            0x38
 205 #define SBP2_COMMAND_SET_KEY                                    0x39
 206 #define SBP2_UNIT_CHARACTERISTICS_KEY                           0x3a
 207 #define SBP2_DEVICE_TYPE_AND_LUN_KEY                            0x14
 208 #define SBP2_FIRMWARE_REVISION_KEY                              0x3c
 209
 210 #define SBP2_AGENT_STATE_OFFSET                                 0x00ULL
 211 #define SBP2_AGENT_RESET_OFFSET                                 0x04ULL
 212 #define SBP2_ORB_POINTER_OFFSET                                 0x08ULL
 213 #define SBP2_DOORBELL_OFFSET                                    0x10ULL
 214 #define SBP2_UNSOLICITED_STATUS_ENABLE_OFFSET                   0x14ULL
 215 #define SBP2_UNSOLICITED_STATUS_VALUE                           0xf
 216
 217 #define SBP2_BUSY_TIMEOUT_ADDRESS                               0xfffff0000210ULL
 218 #define SBP2_BUSY_TIMEOUT_VALUE                                 0xf
 219
 220 #define SBP2_AGENT_RESET_DATA                                   0xf
 221
 222 /*
 223  * Unit spec id and sw version entry for SBP-2 devices
 224  */
 225
 226 #define SBP2_UNIT_SPEC_ID_ENTRY                                 0x0000609e
 227 #define SBP2_SW_VERSION_ENTRY                                   0x00010483
 228
 229 /*
 230  * Other misc defines
 231  */
 232 #define SBP2_128KB_BROKEN_FIRMWARE                              0xa0b800
 233
 234 /*
 235  * SCSI specific stuff
 236  */
 237
 238 #define SBP2_MAX_SG_ELEMENT_LENGTH      0xf000
 239 #define SBP2_MAX_SECTORS                255     /* Max sectors supported */
 240 #define SBP2_MAX_CMDS                   8       /* This should be safe */
 241
 242 /* This is the two dma types we use for cmd_dma below */
 243 enum cmd_dma_types {
 244         CMD_DMA_NONE,
 245         CMD_DMA_PAGE,
 246         CMD_DMA_SINGLE
 247 };
 248
 249 /*
 250  * Encapsulates all the info necessary for an outstanding command.
 251  */
 252 struct sbp2_command_info {
 253
 254         struct list_head list;
 255         struct sbp2_command_orb command_orb ____cacheline_aligned;
 256         dma_addr_t command_orb_dma ____cacheline_aligned;
 257         struct scsi_cmnd *Current_SCpnt;
 258         void (*Current_done)(struct scsi_cmnd *);
 259
 260         /* Also need s/g structure for each sbp2 command */
 261         struct sbp2_unrestricted_page_table scatter_gather_element[SG_ALL] ____cacheline_aligned;
 262         dma_addr_t sge_dma ____cacheline_aligned;
 263         void *sge_buffer;
 264         dma_addr_t cmd_dma;
 265         enum cmd_dma_types dma_type;
 266         unsigned long dma_size;
 267         int dma_dir;
 268
 269 };
 270
 271 /* A list of flags for detected oddities and brokeness. */
 272 #define SBP2_BREAKAGE_128K_MAX_TRANSFER         0x1
 273 #define SBP2_BREAKAGE_INQUIRY_HACK              0x2
 274
 275 struct sbp2scsi_host_info;
 276
 277 /*
 278  * Information needed on a per scsi id basis (one for each sbp2 device)
 279  */
 280 struct scsi_id_instance_data {
 281         /*
 282          * Various sbp2 specific structures
 283          */
 284         struct sbp2_command_orb *last_orb;
 285         dma_addr_t last_orb_dma;
 286         struct sbp2_login_orb *login_orb;
 287         dma_addr_t login_orb_dma;
 288         struct sbp2_login_response *login_response;
 289         dma_addr_t login_response_dma;
 290         struct sbp2_query_logins_orb *query_logins_orb;
 291         dma_addr_t query_logins_orb_dma;
 292         struct sbp2_query_logins_response *query_logins_response;
 293         dma_addr_t query_logins_response_dma;
 294         struct sbp2_reconnect_orb *reconnect_orb;
 295         dma_addr_t reconnect_orb_dma;
 296         struct sbp2_logout_orb *logout_orb;
 297         dma_addr_t logout_orb_dma;
 298         struct sbp2_status_block status_block;
 299
 300         /*
 301          * Stuff we need to know about the sbp2 device itself
 302          */
 303         u64 sbp2_management_agent_addr;
 304         u64 sbp2_command_block_agent_addr;
 305         u32 speed_code;
 306         u32 max_payload_size;
 307
 308         /*
 309          * Values pulled from the device's unit directory
 310          */
 311         u32 sbp2_command_set_spec_id;
 312         u32 sbp2_command_set;
 313         u32 sbp2_unit_characteristics;
 314         u32 sbp2_lun;
 315         u32 sbp2_firmware_revision;
 316
 317         /*
 318          * Address for the device to write status blocks to
 319          */
 320         u64 status_fifo_addr;
 321
 322         /*
 323          * Variable used for logins, reconnects, logouts, query logins
 324          */
 325         atomic_t sbp2_login_complete;
 326
 327         /*
 328          * Pool of command orbs, so we can have more than overlapped command per id
 329          */
 330         spinlock_t sbp2_command_orb_lock;
 331         struct list_head sbp2_command_orb_inuse;
 332         struct list_head sbp2_command_orb_completed;
 333
 334         struct list_head scsi_list;
 335
 336         /* Node entry, as retrieved from NodeMgr entries */
 337         struct node_entry *ne;
 338         struct unit_directory *ud;
 339
 340         /* A backlink to our host_info */
 341         struct sbp2scsi_host_info *hi;
 342
 343         /* SCSI related pointers */
 344         struct scsi_device *sdev;
 345         struct Scsi_Host *scsi_host;
 346
 347         /* Device specific workarounds/brokeness */
 348         u32 workarounds;
 349 };
 350
 351 /* Sbp2 host data structure (one per IEEE1394 host) */
 352 struct sbp2scsi_host_info {
 353         struct hpsb_host *host;         /* IEEE1394 host */
 354         struct list_head scsi_ids;      /* List of scsi ids on this host */
 355 };
 356
 357 /*
 358  * Function prototypes
 359  */
 360
 361 /*
 362  * Various utility prototypes
 363  */
 364 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id);
 365 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id);
 366 static struct sbp2_command_info *sbp2util_find_command_for_orb(struct scsi_id_instance_data *scsi_id, dma_addr_t orb);
 367 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt);
 368 static struct sbp2_command_info *sbp2util_allocate_command_orb(struct scsi_id_instance_data *scsi_id,
 369                                                           struct scsi_cmnd *Current_SCpnt,
 370                                                           void (*Current_done)(struct scsi_cmnd *));
 371 static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id,
 372                 struct sbp2_command_info *command);
 373
 374
 375 static int sbp2_start_device(struct scsi_id_instance_data *scsi_id);
 376 static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id);
 377
 378 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
 379 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data,
 380                                      u64 addr, size_t length, u16 flags);
 381 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, quadlet_t *data,
 382                                     u64 addr, size_t length, u16 flags);
 383 #endif
 384
 385 /*
 386  * SBP-2 protocol related prototypes
 387  */
 388 static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id);
 389 static int sbp2_login_device(struct scsi_id_instance_data *scsi_id);
 390 static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id);
 391 static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id);
 392 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
 393                                     quadlet_t *data, u64 addr, size_t length, u16 flags);
 394 static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait);
 395 static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
 396                                  struct sbp2_command_info *command);
 397 static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
 398                              struct scsi_cmnd *SCpnt,
 399                              void (*done)(struct scsi_cmnd *));
 400 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data);
 401 static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
 402                                      struct scsi_cmnd *SCpnt);
 403 static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
 404                                       struct unit_directory *ud);
 405 static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id);
 406 static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id);
 407
 408 #endif /* SBP2_H */