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  * SBP-2 specific definitions
  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(v)             (((v) & 0x1) << 31)
  36 #define ORB_SET_NOTIFY(v)               (((v) & 0x1) << 31)
  37 #define ORB_SET_RQ_FMT(v)               (((v) & 0x3) << 29)
  38 #define ORB_SET_NODE_ID(v)              (((v) & 0xffff) << 16)
  39 #define ORB_SET_STATUS_FIFO_HI(v, id)   ((v) >> 32 | ORB_SET_NODE_ID(id))
  40 #define ORB_SET_STATUS_FIFO_LO(v)       ((v) & 0xffffffff)
  41 #define ORB_SET_DATA_SIZE(v)            ((v) & 0xffff)
  42 #define ORB_SET_PAGE_SIZE(v)            (((v) & 0x7) << 16)
  43 #define ORB_SET_PAGE_TABLE_PRESENT(v)   (((v) & 0x1) << 19)
  44 #define ORB_SET_MAX_PAYLOAD(v)          (((v) & 0xf) << 20)
  45 #define ORB_SET_SPEED(v)                (((v) & 0x7) << 24)
  46 #define ORB_SET_DIRECTION(v)            (((v) & 0x1) << 27)
  47
  48 struct sbp2_command_orb {
  49         u32 next_ORB_hi;
  50         u32 next_ORB_lo;
  51         u32 data_descriptor_hi;
  52         u32 data_descriptor_lo;
  53         u32 misc;
  54         u8 cdb[12];
  55 } __attribute__((packed));
  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(v)                  ((v) & 0xffff)
  68 #define ORB_SET_FUNCTION(v)             (((v) & 0xf) << 16)
  69 #define ORB_SET_RECONNECT(v)            (((v) & 0xf) << 20)
  70 #define ORB_SET_EXCLUSIVE(v)            (((v) & 0x1) << 28)
  71 #define ORB_SET_LOGIN_RESP_LENGTH(v)    ((v) & 0xffff)
  72 #define ORB_SET_PASSWD_LENGTH(v)        (((v) & 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 } __attribute__((packed));
  84
  85 #define RESPONSE_GET_LOGIN_ID(v)        ((v) & 0xffff)
  86 #define RESPONSE_GET_LENGTH(v)          (((v) >> 16) & 0xffff)
  87 #define RESPONSE_GET_RECONNECT_HOLD(v)  ((v) & 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 } __attribute__((packed));
  95
  96 #define ORB_SET_LOGIN_ID(v)                 ((v) & 0xffff)
  97 #define ORB_SET_QUERY_LOGINS_RESP_LENGTH(v) ((v) & 0xffff)
  98
  99 struct sbp2_query_logins_orb {
 100         u32 reserved1;
 101         u32 reserved2;
 102         u32 query_response_hi;
 103         u32 query_response_lo;
 104         u32 lun_misc;
 105         u32 reserved_resp_length;
 106         u32 status_fifo_hi;
 107         u32 status_fifo_lo;
 108 } __attribute__((packed));
 109
 110 #define RESPONSE_GET_MAX_LOGINS(v)      ((v) & 0xffff)
 111 #define RESPONSE_GET_ACTIVE_LOGINS(v)   ((RESPONSE_GET_LENGTH((v)) - 4) / 12)
 112
 113 struct sbp2_query_logins_response {
 114         u32 length_max_logins;
 115         u32 misc_IDs;
 116         u32 initiator_misc_hi;
 117         u32 initiator_misc_lo;
 118 } __attribute__((packed));
 119
 120 struct sbp2_reconnect_orb {
 121         u32 reserved1;
 122         u32 reserved2;
 123         u32 reserved3;
 124         u32 reserved4;
 125         u32 login_ID_misc;
 126         u32 reserved5;
 127         u32 status_fifo_hi;
 128         u32 status_fifo_lo;
 129 } __attribute__((packed));
 130
 131 struct sbp2_logout_orb {
 132         u32 reserved1;
 133         u32 reserved2;
 134         u32 reserved3;
 135         u32 reserved4;
 136         u32 login_ID_misc;
 137         u32 reserved5;
 138         u32 status_fifo_hi;
 139         u32 status_fifo_lo;
 140 } __attribute__((packed));
 141
 142 #define PAGE_TABLE_SET_SEGMENT_BASE_HI(v)       ((v) & 0xffff)
 143 #define PAGE_TABLE_SET_SEGMENT_LENGTH(v)        (((v) & 0xffff) << 16)
 144
 145 struct sbp2_unrestricted_page_table {
 146         u32 length_segment_base_hi;
 147         u32 segment_base_lo;
 148 } __attribute__((packed));
 149
 150 #define RESP_STATUS_REQUEST_COMPLETE            0x0
 151 #define RESP_STATUS_TRANSPORT_FAILURE           0x1
 152 #define RESP_STATUS_ILLEGAL_REQUEST             0x2
 153 #define RESP_STATUS_VENDOR_DEPENDENT            0x3
 154
 155 #define SBP2_STATUS_NO_ADDITIONAL_INFO          0x0
 156 #define SBP2_STATUS_REQ_TYPE_NOT_SUPPORTED      0x1
 157 #define SBP2_STATUS_SPEED_NOT_SUPPORTED         0x2
 158 #define SBP2_STATUS_PAGE_SIZE_NOT_SUPPORTED     0x3
 159 #define SBP2_STATUS_ACCESS_DENIED               0x4
 160 #define SBP2_STATUS_LU_NOT_SUPPORTED            0x5
 161 #define SBP2_STATUS_MAX_PAYLOAD_TOO_SMALL       0x6
 162 #define SBP2_STATUS_RESOURCES_UNAVAILABLE       0x8
 163 #define SBP2_STATUS_FUNCTION_REJECTED           0x9
 164 #define SBP2_STATUS_LOGIN_ID_NOT_RECOGNIZED     0xa
 165 #define SBP2_STATUS_DUMMY_ORB_COMPLETED         0xb
 166 #define SBP2_STATUS_REQUEST_ABORTED             0xc
 167 #define SBP2_STATUS_UNSPECIFIED_ERROR           0xff
 168
 169 #define SFMT_CURRENT_ERROR                      0x0
 170 #define SFMT_DEFERRED_ERROR                     0x1
 171 #define SFMT_VENDOR_DEPENDENT_STATUS            0x3
 172
 173 #define STATUS_GET_SRC(v)                       (((v) >> 30) & 0x3)
 174 #define STATUS_GET_RESP(v)                      (((v) >> 28) & 0x3)
 175 #define STATUS_GET_LEN(v)                       (((v) >> 24) & 0x7)
 176 #define STATUS_GET_SBP_STATUS(v)                (((v) >> 16) & 0xff)
 177 #define STATUS_GET_ORB_OFFSET_HI(v)             ((v) & 0x0000ffff)
 178 #define STATUS_TEST_DEAD(v)                     ((v) & 0x08000000)
 179 /* test 'resp' | 'dead' | 'sbp2_status' */
 180 #define STATUS_TEST_RDS(v)                      ((v) & 0x38ff0000)
 181
 182 struct sbp2_status_block {
 183         u32 ORB_offset_hi_misc;
 184         u32 ORB_offset_lo;
 185         u8 command_set_dependent[24];
 186 } __attribute__((packed));
 187
 188
 189 /*
 190  * SBP2 related configuration ROM definitions
 191  */
 192
 193 #define SBP2_UNIT_DIRECTORY_OFFSET_KEY          0xd1
 194 #define SBP2_CSR_OFFSET_KEY                     0x54
 195 #define SBP2_UNIT_SPEC_ID_KEY                   0x12
 196 #define SBP2_UNIT_SW_VERSION_KEY                0x13
 197 #define SBP2_COMMAND_SET_SPEC_ID_KEY            0x38
 198 #define SBP2_COMMAND_SET_KEY                    0x39
 199 #define SBP2_UNIT_CHARACTERISTICS_KEY           0x3a
 200 #define SBP2_DEVICE_TYPE_AND_LUN_KEY            0x14
 201 #define SBP2_FIRMWARE_REVISION_KEY              0x3c
 202
 203 #define SBP2_AGENT_STATE_OFFSET                 0x00ULL
 204 #define SBP2_AGENT_RESET_OFFSET                 0x04ULL
 205 #define SBP2_ORB_POINTER_OFFSET                 0x08ULL
 206 #define SBP2_DOORBELL_OFFSET                    0x10ULL
 207 #define SBP2_UNSOLICITED_STATUS_ENABLE_OFFSET   0x14ULL
 208 #define SBP2_UNSOLICITED_STATUS_VALUE           0xf
 209
 210 #define SBP2_BUSY_TIMEOUT_ADDRESS               0xfffff0000210ULL
 211 /* biggest possible value for Single Phase Retry count is 0xf */
 212 #define SBP2_BUSY_TIMEOUT_VALUE                 0xf
 213
 214 #define SBP2_AGENT_RESET_DATA                   0xf
 215
 216 #define SBP2_UNIT_SPEC_ID_ENTRY                 0x0000609e
 217 #define SBP2_SW_VERSION_ENTRY                   0x00010483
 218
 219
 220 /*
 221  * SCSI specific definitions
 222  */
 223
 224 #define SBP2_MAX_SG_ELEMENT_LENGTH              0xf000
 225 #define SBP2_MAX_SECTORS                        255
 226 /* There is no real limitation of the queue depth (i.e. length of the linked
 227  * list of command ORBs) at the target. The chosen depth is merely an
 228  * implementation detail of the sbp2 driver. */
 229 #define SBP2_MAX_CMDS                           8
 230
 231 #define SBP2_SCSI_STATUS_GOOD                   0x0
 232 #define SBP2_SCSI_STATUS_CHECK_CONDITION        0x2
 233 #define SBP2_SCSI_STATUS_CONDITION_MET          0x4
 234 #define SBP2_SCSI_STATUS_BUSY                   0x8
 235 #define SBP2_SCSI_STATUS_RESERVATION_CONFLICT   0x18
 236 #define SBP2_SCSI_STATUS_COMMAND_TERMINATED     0x22
 237 #define SBP2_SCSI_STATUS_SELECTION_TIMEOUT      0xff
 238
 239
 240 /*
 241  * Representations of commands and devices
 242  */
 243
 244 enum sbp2_dma_types {
 245         CMD_DMA_NONE,
 246         CMD_DMA_PAGE,
 247         CMD_DMA_SINGLE
 248 };
 249
 250 /* Per SCSI command */
 251 struct sbp2_command_info {
 252         struct list_head list;
 253         struct sbp2_command_orb command_orb;
 254         dma_addr_t command_orb_dma;
 255         struct scsi_cmnd *Current_SCpnt;
 256         void (*Current_done)(struct scsi_cmnd *);
 257
 258         /* Also need s/g structure for each sbp2 command */
 259         struct sbp2_unrestricted_page_table
 260                 scatter_gather_element[SG_ALL] __attribute__((aligned(8)));
 261         dma_addr_t sge_dma;
 262         void *sge_buffer;
 263         dma_addr_t cmd_dma;
 264         enum sbp2_dma_types dma_type;
 265         unsigned long dma_size;
 266         enum dma_data_direction dma_dir;
 267 };
 268
 269 /* Per FireWire host */
 270 struct sbp2_fwhost_info {
 271         struct hpsb_host *host;
 272         struct list_head logical_units;
 273 };
 274
 275 /* Per logical unit */
 276 struct sbp2_lu {
 277         /* Operation request blocks */
 278         struct sbp2_command_orb *last_orb;
 279         dma_addr_t last_orb_dma;
 280         struct sbp2_login_orb *login_orb;
 281         dma_addr_t login_orb_dma;
 282         struct sbp2_login_response *login_response;
 283         dma_addr_t login_response_dma;
 284         struct sbp2_query_logins_orb *query_logins_orb;
 285         dma_addr_t query_logins_orb_dma;
 286         struct sbp2_query_logins_response *query_logins_response;
 287         dma_addr_t query_logins_response_dma;
 288         struct sbp2_reconnect_orb *reconnect_orb;
 289         dma_addr_t reconnect_orb_dma;
 290         struct sbp2_logout_orb *logout_orb;
 291         dma_addr_t logout_orb_dma;
 292         struct sbp2_status_block status_block;
 293
 294         /* How to talk to the unit */
 295         u64 management_agent_addr;
 296         u64 command_block_agent_addr;
 297         u32 speed_code;
 298         u32 max_payload_size;
 299         u16 lun;
 300
 301         /* Address for the unit to write status blocks to */
 302         u64 status_fifo_addr;
 303
 304         /* Waitqueue flag for logins, reconnects, logouts, query logins */
 305         unsigned int access_complete:1;
 306
 307         /* Pool of command ORBs for this logical unit */
 308         spinlock_t cmd_orb_lock;
 309         struct list_head cmd_orb_inuse;
 310         struct list_head cmd_orb_completed;
 311
 312         /* Backlink to FireWire host; list of units attached to the host */
 313         struct sbp2_fwhost_info *hi;
 314         struct list_head lu_list;
 315
 316         /* IEEE 1394 core's device representations */
 317         struct node_entry *ne;
 318         struct unit_directory *ud;
 319
 320         /* SCSI core's device representations */
 321         struct scsi_device *sdev;
 322         struct Scsi_Host *shost;
 323
 324         /* Device specific workarounds/brokeness */
 325         unsigned workarounds;
 326
 327         /* Connection state */
 328         atomic_t state;
 329
 330         /* For deferred requests to the fetch agent */
 331         struct work_struct protocol_work;
 332 };
 333
 334 /* For use in sbp2_lu.state */
 335 enum sbp2lu_state_types {
 336         SBP2LU_STATE_RUNNING,           /* all normal */
 337         SBP2LU_STATE_IN_RESET,          /* between bus reset and reconnect */
 338         SBP2LU_STATE_IN_SHUTDOWN        /* when sbp2_remove was called */
 339 };
 340
 341 /* For use in sbp2_lu.workarounds and in the corresponding
 342  * module load parameter */
 343 #define SBP2_WORKAROUND_128K_MAX_TRANS  0x1
 344 #define SBP2_WORKAROUND_INQUIRY_36      0x2
 345 #define SBP2_WORKAROUND_MODE_SENSE_8    0x4
 346 #define SBP2_WORKAROUND_FIX_CAPACITY    0x8
 347 #define SBP2_WORKAROUND_OVERRIDE        0x100
 348
 349 #endif /* SBP2_H */