include/target/target_core_transport.h

   1 #ifndef TARGET_CORE_TRANSPORT_H
   2 #define TARGET_CORE_TRANSPORT_H
   3
   4 #define TARGET_CORE_VERSION                     TARGET_CORE_MOD_VERSION
   5
   6 /* Attempts before moving from SHORT to LONG */
   7 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD   3
   8 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT  3  /* In milliseconds */
   9 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG   10 /* In milliseconds */
  10
  11 #define PYX_TRANSPORT_STATUS_INTERVAL           5 /* In seconds */
  12
  13 #define PYX_TRANSPORT_SENT_TO_TRANSPORT         0
  14 #define PYX_TRANSPORT_WRITE_PENDING             1
  15
  16 #define PYX_TRANSPORT_UNKNOWN_SAM_OPCODE        -1
  17 #define PYX_TRANSPORT_HBA_QUEUE_FULL            -2
  18 #define PYX_TRANSPORT_REQ_TOO_MANY_SECTORS      -3
  19 #define PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES   -4
  20 #define PYX_TRANSPORT_INVALID_CDB_FIELD         -5
  21 #define PYX_TRANSPORT_INVALID_PARAMETER_LIST    -6
  22 #define PYX_TRANSPORT_LU_COMM_FAILURE           -7
  23 #define PYX_TRANSPORT_UNKNOWN_MODE_PAGE         -8
  24 #define PYX_TRANSPORT_WRITE_PROTECTED           -9
  25 #define PYX_TRANSPORT_TASK_TIMEOUT              -10
  26 #define PYX_TRANSPORT_RESERVATION_CONFLICT      -11
  27 #define PYX_TRANSPORT_ILLEGAL_REQUEST           -12
  28 #define PYX_TRANSPORT_USE_SENSE_REASON          -13
  29
  30 #ifndef SAM_STAT_RESERVATION_CONFLICT
  31 #define SAM_STAT_RESERVATION_CONFLICT           0x18
  32 #endif
  33
  34 #define TRANSPORT_PLUGIN_FREE                   0
  35 #define TRANSPORT_PLUGIN_REGISTERED             1
  36
  37 #define TRANSPORT_PLUGIN_PHBA_PDEV              1
  38 #define TRANSPORT_PLUGIN_VHBA_PDEV              2
  39 #define TRANSPORT_PLUGIN_VHBA_VDEV              3
  40
  41 /* For SE OBJ Plugins, in seconds */
  42 #define TRANSPORT_TIMEOUT_TUR                   10
  43 #define TRANSPORT_TIMEOUT_TYPE_DISK             60
  44 #define TRANSPORT_TIMEOUT_TYPE_ROM              120
  45 #define TRANSPORT_TIMEOUT_TYPE_TAPE             600
  46 #define TRANSPORT_TIMEOUT_TYPE_OTHER            300
  47
  48 /* For se_task->task_state_flags */
  49 #define TSF_EXCEPTION_CLEARED                   0x01
  50
  51 /*
  52  * struct se_subsystem_dev->su_dev_flags
  53 */
  54 #define SDF_FIRMWARE_VPD_UNIT_SERIAL            0x00000001
  55 #define SDF_EMULATED_VPD_UNIT_SERIAL            0x00000002
  56 #define SDF_USING_UDEV_PATH                     0x00000004
  57 #define SDF_USING_ALIAS                         0x00000008
  58
  59 /*
  60  * struct se_device->dev_flags
  61  */
  62 #define DF_READ_ONLY                            0x00000001
  63 #define DF_SPC2_RESERVATIONS                    0x00000002
  64 #define DF_SPC2_RESERVATIONS_WITH_ISID          0x00000004
  65
  66 /* struct se_dev_attrib sanity values */
  67 /* 10 Minutes */
  68 #define DA_TASK_TIMEOUT_MAX                     600
  69 /* Default max_unmap_lba_count */
  70 #define DA_MAX_UNMAP_LBA_COUNT                  0
  71 /* Default max_unmap_block_desc_count */
  72 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT           0
  73 /* Default unmap_granularity */
  74 #define DA_UNMAP_GRANULARITY_DEFAULT            0
  75 /* Default unmap_granularity_alignment */
  76 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT  0
  77 /* Emulation for Direct Page Out */
  78 #define DA_EMULATE_DPO                          0
  79 /* Emulation for Forced Unit Access WRITEs */
  80 #define DA_EMULATE_FUA_WRITE                    1
  81 /* Emulation for Forced Unit Access READs */
  82 #define DA_EMULATE_FUA_READ                     0
  83 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
  84 #define DA_EMULATE_WRITE_CACHE                  0
  85 /* Emulation for UNIT ATTENTION Interlock Control */
  86 #define DA_EMULATE_UA_INTLLCK_CTRL              0
  87 /* Emulation for TASK_ABORTED status (TAS) by default */
  88 #define DA_EMULATE_TAS                          1
  89 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
  90 #define DA_EMULATE_TPU                          0
  91 /*
  92  * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
  93  * block/blk-lib.c:blkdev_issue_discard()
  94  */
  95 #define DA_EMULATE_TPWS                         0
  96 /* No Emulation for PSCSI by default */
  97 #define DA_EMULATE_RESERVATIONS                 0
  98 /* No Emulation for PSCSI by default */
  99 #define DA_EMULATE_ALUA                         0
 100 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
 101 #define DA_ENFORCE_PR_ISIDS                     1
 102 #define DA_STATUS_MAX_SECTORS_MIN               16
 103 #define DA_STATUS_MAX_SECTORS_MAX               8192
 104 /* By default don't report non-rotating (solid state) medium */
 105 #define DA_IS_NONROT                            0
 106 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
 107 #define DA_EMULATE_REST_REORD                   0
 108
 109 #define SE_MODE_PAGE_BUF                        512
 110
 111 #define MOD_MAX_SECTORS(ms, bs)                 (ms % (PAGE_SIZE / bs))
 112
 113 struct se_mem;
 114 struct se_subsystem_api;
 115
 116 extern struct kmem_cache *se_mem_cache;
 117
 118 extern int init_se_kmem_caches(void);
 119 extern void release_se_kmem_caches(void);
 120 extern u32 scsi_get_new_index(scsi_index_t);
 121 extern void transport_init_queue_obj(struct se_queue_obj *);
 122 extern int transport_subsystem_check_init(void);
 123 extern int transport_subsystem_register(struct se_subsystem_api *);
 124 extern void transport_subsystem_release(struct se_subsystem_api *);
 125 extern void transport_load_plugins(void);
 126 extern struct se_session *transport_init_session(void);
 127 extern void __transport_register_session(struct se_portal_group *,
 128                                         struct se_node_acl *,
 129                                         struct se_session *, void *);
 130 extern void transport_register_session(struct se_portal_group *,
 131                                         struct se_node_acl *,
 132                                         struct se_session *, void *);
 133 extern void transport_free_session(struct se_session *);
 134 extern void transport_deregister_session_configfs(struct se_session *);
 135 extern void transport_deregister_session(struct se_session *);
 136 extern void transport_cmd_finish_abort(struct se_cmd *, int);
 137 extern void transport_cmd_finish_abort_tmr(struct se_cmd *);
 138 extern void transport_complete_sync_cache(struct se_cmd *, int);
 139 extern void transport_complete_task(struct se_task *, int);
 140 extern void transport_add_task_to_execute_queue(struct se_task *,
 141                                                 struct se_task *,
 142                                                 struct se_device *);
 143 extern void transport_remove_task_from_execute_queue(struct se_task *,
 144                                                 struct se_device *);
 145 unsigned char *transport_dump_cmd_direction(struct se_cmd *);
 146 extern void transport_dump_dev_state(struct se_device *, char *, int *);
 147 extern void transport_dump_dev_info(struct se_device *, struct se_lun *,
 148                                         unsigned long long, char *, int *);
 149 extern void transport_dump_vpd_proto_id(struct t10_vpd *,
 150                                         unsigned char *, int);
 151 extern void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
 152 extern int transport_dump_vpd_assoc(struct t10_vpd *,
 153                                         unsigned char *, int);
 154 extern int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
 155 extern int transport_dump_vpd_ident_type(struct t10_vpd *,
 156                                         unsigned char *, int);
 157 extern int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
 158 extern int transport_dump_vpd_ident(struct t10_vpd *,
 159                                         unsigned char *, int);
 160 extern int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
 161 extern struct se_device *transport_add_device_to_core_hba(struct se_hba *,
 162                                         struct se_subsystem_api *,
 163                                         struct se_subsystem_dev *, u32,
 164                                         void *, struct se_dev_limits *,
 165                                         const char *, const char *);
 166 extern void transport_init_se_cmd(struct se_cmd *,
 167                                         struct target_core_fabric_ops *,
 168                                         struct se_session *, u32, int, int,
 169                                         unsigned char *);
 170 void *transport_kmap_first_data_page(struct se_cmd *cmd);
 171 void transport_kunmap_first_data_page(struct se_cmd *cmd);
 172 extern void transport_free_se_cmd(struct se_cmd *);
 173 extern int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
 174 extern int transport_generic_handle_cdb(struct se_cmd *);
 175 extern int transport_handle_cdb_direct(struct se_cmd *);
 176 extern int transport_generic_handle_cdb_map(struct se_cmd *);
 177 extern int transport_generic_handle_data(struct se_cmd *);
 178 extern void transport_new_cmd_failure(struct se_cmd *);
 179 extern int transport_generic_handle_tmr(struct se_cmd *);
 180 extern void transport_generic_free_cmd_intr(struct se_cmd *);
 181 extern void __transport_stop_task_timer(struct se_task *, unsigned long *);
 182 extern int transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *, u32,
 183                                 struct scatterlist *, u32);
 184 extern int transport_clear_lun_from_sessions(struct se_lun *);
 185 extern int transport_check_aborted_status(struct se_cmd *, int);
 186 extern int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
 187 extern void transport_send_task_abort(struct se_cmd *);
 188 extern void transport_release_cmd(struct se_cmd *);
 189 extern void transport_generic_free_cmd(struct se_cmd *, int, int);
 190 extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
 191 extern int transport_init_task_sg(struct se_task *, struct se_mem *, u32);
 192 extern int transport_map_mem_to_sg(struct se_task *, struct list_head *,
 193                                         struct scatterlist *, struct se_mem *,
 194                                         struct se_mem **, u32 *, u32 *);
 195 extern void transport_do_task_sg_chain(struct se_cmd *);
 196 extern void transport_generic_process_write(struct se_cmd *);
 197 extern int transport_generic_new_cmd(struct se_cmd *);
 198 extern int transport_generic_do_tmr(struct se_cmd *);
 199 /* From target_core_alua.c */
 200 extern int core_alua_check_nonop_delay(struct se_cmd *);
 201 /* From target_core_cdb.c */
 202 extern int transport_emulate_control_cdb(struct se_task *);
 203
 204 /*
 205  * Each se_transport_task_t can have N number of possible struct se_task's
 206  * for the storage transport(s) to possibly execute.
 207  * Used primarily for splitting up CDBs that exceed the physical storage
 208  * HBA's maximum sector count per task.
 209  */
 210 struct se_mem {
 211         struct page     *se_page;
 212         u32             se_len;
 213         u32             se_off;
 214         struct list_head se_list;
 215 } ____cacheline_aligned;
 216
 217 /*
 218  *      Each type of disk transport supported MUST have a template defined
 219  *      within its .h file.
 220  */
 221 struct se_subsystem_api {
 222         /*
 223          * The Name. :-)
 224          */
 225         char name[16];
 226         /*
 227          * Transport Type.
 228          */
 229         u8 transport_type;
 230         /*
 231          * struct module for struct se_hba references
 232          */
 233         struct module *owner;
 234         /*
 235          * Used for global se_subsystem_api list_head
 236          */
 237         struct list_head sub_api_list;
 238         /*
 239          * For SCF_SCSI_NON_DATA_CDB
 240          */
 241         int (*cdb_none)(struct se_task *);
 242         /*
 243          * For SCF_SCSI_DATA_SG_IO_CDB
 244          */
 245         int (*map_data_SG)(struct se_task *);
 246         /*
 247          * For SCF_SCSI_CONTROL_SG_IO_CDB
 248          */
 249         int (*map_control_SG)(struct se_task *);
 250         /*
 251          * attach_hba():
 252          */
 253         int (*attach_hba)(struct se_hba *, u32);
 254         /*
 255          * detach_hba():
 256          */
 257         void (*detach_hba)(struct se_hba *);
 258         /*
 259          * pmode_hba(): Used for TCM/pSCSI subsystem plugin HBA ->
 260          *              Linux/SCSI struct Scsi_Host passthrough
 261         */
 262         int (*pmode_enable_hba)(struct se_hba *, unsigned long);
 263         /*
 264          * allocate_virtdevice():
 265          */
 266         void *(*allocate_virtdevice)(struct se_hba *, const char *);
 267         /*
 268          * create_virtdevice(): Only for Virtual HBAs
 269          */
 270         struct se_device *(*create_virtdevice)(struct se_hba *,
 271                                 struct se_subsystem_dev *, void *);
 272         /*
 273          * free_device():
 274          */
 275         void (*free_device)(void *);
 276
 277         /*
 278          * dpo_emulated():
 279          */
 280         int (*dpo_emulated)(struct se_device *);
 281         /*
 282          * fua_write_emulated():
 283          */
 284         int (*fua_write_emulated)(struct se_device *);
 285         /*
 286          * fua_read_emulated():
 287          */
 288         int (*fua_read_emulated)(struct se_device *);
 289         /*
 290          * write_cache_emulated():
 291          */
 292         int (*write_cache_emulated)(struct se_device *);
 293         /*
 294          * transport_complete():
 295          *
 296          * Use transport_generic_complete() for majority of DAS transport
 297          * drivers.  Provided out of convenience.
 298          */
 299         int (*transport_complete)(struct se_task *task);
 300         struct se_task *(*alloc_task)(unsigned char *cdb);
 301         /*
 302          * do_task():
 303          */
 304         int (*do_task)(struct se_task *);
 305         /*
 306          * Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
 307          * UNMAP and WRITE_SAME_* w/ UNMAP=1 <-> Linux/Block Discard
 308          */
 309         int (*do_discard)(struct se_device *, sector_t, u32);
 310         /*
 311          * Used  by virtual subsystem plugins IBLOCK and FILEIO to emulate
 312          * SYNCHRONIZE_CACHE_* <-> Linux/Block blkdev_issue_flush()
 313          */
 314         void (*do_sync_cache)(struct se_task *);
 315         /*
 316          * free_task():
 317          */
 318         void (*free_task)(struct se_task *);
 319         /*
 320          * check_configfs_dev_params():
 321          */
 322         ssize_t (*check_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *);
 323         /*
 324          * set_configfs_dev_params():
 325          */
 326         ssize_t (*set_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
 327                                                 const char *, ssize_t);
 328         /*
 329          * show_configfs_dev_params():
 330          */
 331         ssize_t (*show_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
 332                                                 char *);
 333         /*
 334          * get_cdb():
 335          */
 336         unsigned char *(*get_cdb)(struct se_task *);
 337         /*
 338          * get_device_rev():
 339          */
 340         u32 (*get_device_rev)(struct se_device *);
 341         /*
 342          * get_device_type():
 343          */
 344         u32 (*get_device_type)(struct se_device *);
 345         /*
 346          * Get the sector_t from a subsystem backstore..
 347          */
 348         sector_t (*get_blocks)(struct se_device *);
 349         /*
 350          * get_sense_buffer():
 351          */
 352         unsigned char *(*get_sense_buffer)(struct se_task *);
 353 } ____cacheline_aligned;
 354
 355 #endif /* TARGET_CORE_TRANSPORT_H */