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
 105 #define SE_MODE_PAGE_BUF                        512
 106
 107 #define MOD_MAX_SECTORS(ms, bs)                 (ms % (PAGE_SIZE / bs))
 108
 109 struct se_mem;
 110 struct se_subsystem_api;
 111
 112 extern int init_se_global(void);
 113 extern void release_se_global(void);
 114 extern void init_scsi_index_table(void);
 115 extern u32 scsi_get_new_index(scsi_index_t);
 116 extern void transport_init_queue_obj(struct se_queue_obj *);
 117 extern int transport_subsystem_check_init(void);
 118 extern int transport_subsystem_register(struct se_subsystem_api *);
 119 extern void transport_subsystem_release(struct se_subsystem_api *);
 120 extern void transport_load_plugins(void);
 121 extern struct se_session *transport_init_session(void);
 122 extern void __transport_register_session(struct se_portal_group *,
 123                                         struct se_node_acl *,
 124                                         struct se_session *, void *);
 125 extern void transport_register_session(struct se_portal_group *,
 126                                         struct se_node_acl *,
 127                                         struct se_session *, void *);
 128 extern void transport_free_session(struct se_session *);
 129 extern void transport_deregister_session_configfs(struct se_session *);
 130 extern void transport_deregister_session(struct se_session *);
 131 extern void transport_cmd_finish_abort(struct se_cmd *, int);
 132 extern void transport_cmd_finish_abort_tmr(struct se_cmd *);
 133 extern void transport_complete_sync_cache(struct se_cmd *, int);
 134 extern void transport_complete_task(struct se_task *, int);
 135 extern void transport_add_task_to_execute_queue(struct se_task *,
 136                                                 struct se_task *,
 137                                                 struct se_device *);
 138 unsigned char *transport_dump_cmd_direction(struct se_cmd *);
 139 extern void transport_dump_dev_state(struct se_device *, char *, int *);
 140 extern void transport_dump_dev_info(struct se_device *, struct se_lun *,
 141                                         unsigned long long, char *, int *);
 142 extern void transport_dump_vpd_proto_id(struct t10_vpd *,
 143                                         unsigned char *, int);
 144 extern void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
 145 extern int transport_dump_vpd_assoc(struct t10_vpd *,
 146                                         unsigned char *, int);
 147 extern int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
 148 extern int transport_dump_vpd_ident_type(struct t10_vpd *,
 149                                         unsigned char *, int);
 150 extern int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
 151 extern int transport_dump_vpd_ident(struct t10_vpd *,
 152                                         unsigned char *, int);
 153 extern int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
 154 extern struct se_device *transport_add_device_to_core_hba(struct se_hba *,
 155                                         struct se_subsystem_api *,
 156                                         struct se_subsystem_dev *, u32,
 157                                         void *, struct se_dev_limits *,
 158                                         const char *, const char *);
 159 extern void transport_device_setup_cmd(struct se_cmd *);
 160 extern void transport_init_se_cmd(struct se_cmd *,
 161                                         struct target_core_fabric_ops *,
 162                                         struct se_session *, u32, int, int,
 163                                         unsigned char *);
 164 extern void transport_free_se_cmd(struct se_cmd *);
 165 extern int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
 166 extern int transport_generic_handle_cdb(struct se_cmd *);
 167 extern int transport_generic_handle_cdb_map(struct se_cmd *);
 168 extern int transport_generic_handle_data(struct se_cmd *);
 169 extern void transport_new_cmd_failure(struct se_cmd *);
 170 extern int transport_generic_handle_tmr(struct se_cmd *);
 171 extern void __transport_stop_task_timer(struct se_task *, unsigned long *);
 172 extern unsigned char transport_asciihex_to_binaryhex(unsigned char val[2]);
 173 extern int transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *, u32,
 174                                 struct scatterlist *, u32);
 175 extern int transport_clear_lun_from_sessions(struct se_lun *);
 176 extern int transport_check_aborted_status(struct se_cmd *, int);
 177 extern int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
 178 extern void transport_send_task_abort(struct se_cmd *);
 179 extern void transport_release_cmd_to_pool(struct se_cmd *);
 180 extern void transport_generic_free_cmd(struct se_cmd *, int, int, int);
 181 extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
 182 extern u32 transport_calc_sg_num(struct se_task *, struct se_mem *, u32);
 183 extern int transport_map_mem_to_sg(struct se_task *, struct list_head *,
 184                                         void *, struct se_mem *,
 185                                         struct se_mem **, u32 *, u32 *);
 186 extern void transport_do_task_sg_chain(struct se_cmd *);
 187 extern void transport_generic_process_write(struct se_cmd *);
 188 extern int transport_generic_do_tmr(struct se_cmd *);
 189 /* From target_core_alua.c */
 190 extern int core_alua_check_nonop_delay(struct se_cmd *);
 191
 192 /*
 193  * Each se_transport_task_t can have N number of possible struct se_task's
 194  * for the storage transport(s) to possibly execute.
 195  * Used primarily for splitting up CDBs that exceed the physical storage
 196  * HBA's maximum sector count per task.
 197  */
 198 struct se_mem {
 199         struct page     *se_page;
 200         u32             se_len;
 201         u32             se_off;
 202         struct list_head se_list;
 203 } ____cacheline_aligned;
 204
 205 /*
 206  *      Each type of disk transport supported MUST have a template defined
 207  *      within its .h file.
 208  */
 209 struct se_subsystem_api {
 210         /*
 211          * The Name. :-)
 212          */
 213         char name[16];
 214         /*
 215          * Transport Type.
 216          */
 217         u8 transport_type;
 218         /*
 219          * struct module for struct se_hba references
 220          */
 221         struct module *owner;
 222         /*
 223          * Used for global se_subsystem_api list_head
 224          */
 225         struct list_head sub_api_list;
 226         /*
 227          * For SCF_SCSI_NON_DATA_CDB
 228          */
 229         int (*cdb_none)(struct se_task *);
 230         /*
 231          * For SCF_SCSI_CONTROL_NONSG_IO_CDB
 232          */
 233         int (*map_task_non_SG)(struct se_task *);
 234         /*
 235          * For SCF_SCSI_DATA_SG_IO_CDB and SCF_SCSI_CONTROL_SG_IO_CDB
 236          */
 237         int (*map_task_SG)(struct se_task *);
 238         /*
 239          * attach_hba():
 240          */
 241         int (*attach_hba)(struct se_hba *, u32);
 242         /*
 243          * detach_hba():
 244          */
 245         void (*detach_hba)(struct se_hba *);
 246         /*
 247          * pmode_hba(): Used for TCM/pSCSI subsystem plugin HBA ->
 248          *              Linux/SCSI struct Scsi_Host passthrough
 249         */
 250         int (*pmode_enable_hba)(struct se_hba *, unsigned long);
 251         /*
 252          * allocate_virtdevice():
 253          */
 254         void *(*allocate_virtdevice)(struct se_hba *, const char *);
 255         /*
 256          * create_virtdevice(): Only for Virtual HBAs
 257          */
 258         struct se_device *(*create_virtdevice)(struct se_hba *,
 259                                 struct se_subsystem_dev *, void *);
 260         /*
 261          * free_device():
 262          */
 263         void (*free_device)(void *);
 264
 265         /*
 266          * dpo_emulated():
 267          */
 268         int (*dpo_emulated)(struct se_device *);
 269         /*
 270          * fua_write_emulated():
 271          */
 272         int (*fua_write_emulated)(struct se_device *);
 273         /*
 274          * fua_read_emulated():
 275          */
 276         int (*fua_read_emulated)(struct se_device *);
 277         /*
 278          * write_cache_emulated():
 279          */
 280         int (*write_cache_emulated)(struct se_device *);
 281         /*
 282          * transport_complete():
 283          *
 284          * Use transport_generic_complete() for majority of DAS transport
 285          * drivers.  Provided out of convenience.
 286          */
 287         int (*transport_complete)(struct se_task *task);
 288         struct se_task *(*alloc_task)(struct se_cmd *);
 289         /*
 290          * do_task():
 291          */
 292         int (*do_task)(struct se_task *);
 293         /*
 294          * Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
 295          * UNMAP and WRITE_SAME_* w/ UNMAP=1 <-> Linux/Block Discard
 296          */
 297         int (*do_discard)(struct se_device *, sector_t, u32);
 298         /*
 299          * Used  by virtual subsystem plugins IBLOCK and FILEIO to emulate
 300          * SYNCHRONIZE_CACHE_* <-> Linux/Block blkdev_issue_flush()
 301          */
 302         void (*do_sync_cache)(struct se_task *);
 303         /*
 304          * free_task():
 305          */
 306         void (*free_task)(struct se_task *);
 307         /*
 308          * check_configfs_dev_params():
 309          */
 310         ssize_t (*check_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *);
 311         /*
 312          * set_configfs_dev_params():
 313          */
 314         ssize_t (*set_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
 315                                                 const char *, ssize_t);
 316         /*
 317          * show_configfs_dev_params():
 318          */
 319         ssize_t (*show_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
 320                                                 char *);
 321         /*
 322          * get_cdb():
 323          */
 324         unsigned char *(*get_cdb)(struct se_task *);
 325         /*
 326          * get_device_rev():
 327          */
 328         u32 (*get_device_rev)(struct se_device *);
 329         /*
 330          * get_device_type():
 331          */
 332         u32 (*get_device_type)(struct se_device *);
 333         /*
 334          * Get the sector_t from a subsystem backstore..
 335          */
 336         sector_t (*get_blocks)(struct se_device *);
 337         /*
 338          * do_se_mem_map():
 339          */
 340         int (*do_se_mem_map)(struct se_task *, struct list_head *, void *,
 341                                 struct se_mem *, struct se_mem **, u32 *, u32 *);
 342         /*
 343          * get_sense_buffer():
 344          */
 345         unsigned char *(*get_sense_buffer)(struct se_task *);
 346 } ____cacheline_aligned;
 347
 348 #define TRANSPORT(dev)          ((dev)->transport)
 349 #define HBA_TRANSPORT(hba)      ((hba)->transport)
 350
 351 extern struct se_global *se_global;
 352
 353 #endif /* TARGET_CORE_TRANSPORT_H */