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 /*
  49  * struct se_subsystem_dev->su_dev_flags
  50 */
  51 #define SDF_FIRMWARE_VPD_UNIT_SERIAL            0x00000001
  52 #define SDF_EMULATED_VPD_UNIT_SERIAL            0x00000002
  53 #define SDF_USING_UDEV_PATH                     0x00000004
  54 #define SDF_USING_ALIAS                         0x00000008
  55
  56 /*
  57  * struct se_device->dev_flags
  58  */
  59 #define DF_READ_ONLY                            0x00000001
  60 #define DF_SPC2_RESERVATIONS                    0x00000002
  61 #define DF_SPC2_RESERVATIONS_WITH_ISID          0x00000004
  62
  63 /* struct se_dev_attrib sanity values */
  64 /* 10 Minutes */
  65 #define DA_TASK_TIMEOUT_MAX                     600
  66 /* Default max_unmap_lba_count */
  67 #define DA_MAX_UNMAP_LBA_COUNT                  0
  68 /* Default max_unmap_block_desc_count */
  69 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT           0
  70 /* Default unmap_granularity */
  71 #define DA_UNMAP_GRANULARITY_DEFAULT            0
  72 /* Default unmap_granularity_alignment */
  73 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT  0
  74 /* Emulation for Direct Page Out */
  75 #define DA_EMULATE_DPO                          0
  76 /* Emulation for Forced Unit Access WRITEs */
  77 #define DA_EMULATE_FUA_WRITE                    1
  78 /* Emulation for Forced Unit Access READs */
  79 #define DA_EMULATE_FUA_READ                     0
  80 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
  81 #define DA_EMULATE_WRITE_CACHE                  0
  82 /* Emulation for UNIT ATTENTION Interlock Control */
  83 #define DA_EMULATE_UA_INTLLCK_CTRL              0
  84 /* Emulation for TASK_ABORTED status (TAS) by default */
  85 #define DA_EMULATE_TAS                          1
  86 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
  87 #define DA_EMULATE_TPU                          0
  88 /*
  89  * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
  90  * block/blk-lib.c:blkdev_issue_discard()
  91  */
  92 #define DA_EMULATE_TPWS                         0
  93 /* No Emulation for PSCSI by default */
  94 #define DA_EMULATE_RESERVATIONS                 0
  95 /* No Emulation for PSCSI by default */
  96 #define DA_EMULATE_ALUA                         0
  97 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
  98 #define DA_ENFORCE_PR_ISIDS                     1
  99 #define DA_STATUS_MAX_SECTORS_MIN               16
 100 #define DA_STATUS_MAX_SECTORS_MAX               8192
 101 /* By default don't report non-rotating (solid state) medium */
 102 #define DA_IS_NONROT                            0
 103 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
 104 #define DA_EMULATE_REST_REORD                   0
 105
 106 #define SE_MODE_PAGE_BUF                        512
 107
 108 #define MOD_MAX_SECTORS(ms, bs)                 (ms % (PAGE_SIZE / bs))
 109
 110 struct se_subsystem_api;
 111
 112 extern int init_se_kmem_caches(void);
 113 extern void release_se_kmem_caches(void);
 114 extern u32 scsi_get_new_index(scsi_index_t);
 115 extern void transport_init_queue_obj(struct se_queue_obj *);
 116 extern int transport_subsystem_check_init(void);
 117 extern int transport_subsystem_register(struct se_subsystem_api *);
 118 extern void transport_subsystem_release(struct se_subsystem_api *);
 119 extern void transport_load_plugins(void);
 120 extern struct se_session *transport_init_session(void);
 121 extern void __transport_register_session(struct se_portal_group *,
 122                                         struct se_node_acl *,
 123                                         struct se_session *, void *);
 124 extern void transport_register_session(struct se_portal_group *,
 125                                         struct se_node_acl *,
 126                                         struct se_session *, void *);
 127 extern void transport_free_session(struct se_session *);
 128 extern void transport_deregister_session_configfs(struct se_session *);
 129 extern void transport_deregister_session(struct se_session *);
 130 extern void transport_cmd_finish_abort(struct se_cmd *, int);
 131 extern void transport_complete_sync_cache(struct se_cmd *, int);
 132 extern void transport_complete_task(struct se_task *, int);
 133 extern void transport_add_task_to_execute_queue(struct se_task *,
 134                                                 struct se_task *,
 135                                                 struct se_device *);
 136 extern void transport_remove_task_from_execute_queue(struct se_task *,
 137                                                 struct se_device *);
 138 extern void __transport_remove_task_from_execute_queue(struct se_task *,
 139                                                 struct se_device *);
 140 unsigned char *transport_dump_cmd_direction(struct se_cmd *);
 141 extern void transport_dump_dev_state(struct se_device *, char *, int *);
 142 extern void transport_dump_dev_info(struct se_device *, struct se_lun *,
 143                                         unsigned long long, char *, int *);
 144 extern void transport_dump_vpd_proto_id(struct t10_vpd *,
 145                                         unsigned char *, int);
 146 extern void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
 147 extern int transport_dump_vpd_assoc(struct t10_vpd *,
 148                                         unsigned char *, int);
 149 extern int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
 150 extern int transport_dump_vpd_ident_type(struct t10_vpd *,
 151                                         unsigned char *, int);
 152 extern int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
 153 extern int transport_dump_vpd_ident(struct t10_vpd *,
 154                                         unsigned char *, int);
 155 extern int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
 156 extern struct se_device *transport_add_device_to_core_hba(struct se_hba *,
 157                                         struct se_subsystem_api *,
 158                                         struct se_subsystem_dev *, u32,
 159                                         void *, struct se_dev_limits *,
 160                                         const char *, const char *);
 161 extern void transport_init_se_cmd(struct se_cmd *,
 162                                         struct target_core_fabric_ops *,
 163                                         struct se_session *, u32, int, int,
 164                                         unsigned char *);
 165 void *transport_kmap_first_data_page(struct se_cmd *cmd);
 166 void transport_kunmap_first_data_page(struct se_cmd *cmd);
 167 extern int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
 168 extern int transport_handle_cdb_direct(struct se_cmd *);
 169 extern int transport_generic_handle_cdb_map(struct se_cmd *);
 170 extern int transport_generic_handle_data(struct se_cmd *);
 171 extern void transport_new_cmd_failure(struct se_cmd *);
 172 extern int transport_generic_handle_tmr(struct se_cmd *);
 173 extern void transport_generic_free_cmd_intr(struct se_cmd *);
 174 extern bool target_stop_task(struct se_task *task, unsigned long *flags);
 175 extern int transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *, u32,
 176                                 struct scatterlist *, u32);
 177 extern int transport_clear_lun_from_sessions(struct se_lun *);
 178 extern void transport_wait_for_tasks(struct se_cmd *);
 179 extern int transport_check_aborted_status(struct se_cmd *, int);
 180 extern int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
 181 extern void transport_send_task_abort(struct se_cmd *);
 182 extern void transport_release_cmd(struct se_cmd *);
 183 extern void transport_generic_free_cmd(struct se_cmd *, int);
 184 extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
 185 extern void transport_do_task_sg_chain(struct se_cmd *);
 186 extern void transport_generic_process_write(struct se_cmd *);
 187 extern int transport_generic_new_cmd(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 /* From target_core_cdb.c */
 192 extern int transport_emulate_control_cdb(struct se_task *);
 193 extern void target_get_task_cdb(struct se_task *task, unsigned char *cdb);
 194
 195 /*
 196  * Each se_transport_task_t can have N number of possible struct se_task's
 197  * for the storage transport(s) to possibly execute.
 198  * Used primarily for splitting up CDBs that exceed the physical storage
 199  * HBA's maximum sector count per task.
 200  */
 201 struct se_mem {
 202         struct page     *se_page;
 203         u32             se_len;
 204         u32             se_off;
 205         struct list_head se_list;
 206 } ____cacheline_aligned;
 207
 208 /*
 209  *      Each type of disk transport supported MUST have a template defined
 210  *      within its .h file.
 211  */
 212 struct se_subsystem_api {
 213         /*
 214          * The Name. :-)
 215          */
 216         char name[16];
 217         /*
 218          * Transport Type.
 219          */
 220         u8 transport_type;
 221
 222         unsigned int fua_write_emulated : 1;
 223         unsigned int write_cache_emulated : 1;
 224
 225         /*
 226          * struct module for struct se_hba references
 227          */
 228         struct module *owner;
 229         /*
 230          * Used for global se_subsystem_api list_head
 231          */
 232         struct list_head sub_api_list;
 233         /*
 234          * attach_hba():
 235          */
 236         int (*attach_hba)(struct se_hba *, u32);
 237         /*
 238          * detach_hba():
 239          */
 240         void (*detach_hba)(struct se_hba *);
 241         /*
 242          * pmode_hba(): Used for TCM/pSCSI subsystem plugin HBA ->
 243          *              Linux/SCSI struct Scsi_Host passthrough
 244         */
 245         int (*pmode_enable_hba)(struct se_hba *, unsigned long);
 246         /*
 247          * allocate_virtdevice():
 248          */
 249         void *(*allocate_virtdevice)(struct se_hba *, const char *);
 250         /*
 251          * create_virtdevice(): Only for Virtual HBAs
 252          */
 253         struct se_device *(*create_virtdevice)(struct se_hba *,
 254                                 struct se_subsystem_dev *, void *);
 255         /*
 256          * free_device():
 257          */
 258         void (*free_device)(void *);
 259
 260         /*
 261          * transport_complete():
 262          *
 263          * Use transport_generic_complete() for majority of DAS transport
 264          * drivers.  Provided out of convenience.
 265          */
 266         int (*transport_complete)(struct se_task *task);
 267         struct se_task *(*alloc_task)(unsigned char *cdb);
 268         /*
 269          * do_task():
 270          */
 271         int (*do_task)(struct se_task *);
 272         /*
 273          * Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
 274          * UNMAP and WRITE_SAME_* w/ UNMAP=1 <-> Linux/Block Discard
 275          */
 276         int (*do_discard)(struct se_device *, sector_t, u32);
 277         /*
 278          * Used  by virtual subsystem plugins IBLOCK and FILEIO to emulate
 279          * SYNCHRONIZE_CACHE_* <-> Linux/Block blkdev_issue_flush()
 280          */
 281         void (*do_sync_cache)(struct se_task *);
 282         /*
 283          * free_task():
 284          */
 285         void (*free_task)(struct se_task *);
 286         /*
 287          * check_configfs_dev_params():
 288          */
 289         ssize_t (*check_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *);
 290         /*
 291          * set_configfs_dev_params():
 292          */
 293         ssize_t (*set_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
 294                                                 const char *, ssize_t);
 295         /*
 296          * show_configfs_dev_params():
 297          */
 298         ssize_t (*show_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
 299                                                 char *);
 300         /*
 301          * get_device_rev():
 302          */
 303         u32 (*get_device_rev)(struct se_device *);
 304         /*
 305          * get_device_type():
 306          */
 307         u32 (*get_device_type)(struct se_device *);
 308         /*
 309          * Get the sector_t from a subsystem backstore..
 310          */
 311         sector_t (*get_blocks)(struct se_device *);
 312         /*
 313          * get_sense_buffer():
 314          */
 315         unsigned char *(*get_sense_buffer)(struct se_task *);
 316 } ____cacheline_aligned;
 317
 318 #endif /* TARGET_CORE_TRANSPORT_H */