312 lines
11 KiB
C
312 lines
11 KiB
C
#ifndef TARGET_CORE_TRANSPORT_H
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#define TARGET_CORE_TRANSPORT_H
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#define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION
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/* Attempts before moving from SHORT to LONG */
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#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
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#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
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#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
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#define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
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#define PYX_TRANSPORT_SENT_TO_TRANSPORT 0
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#define PYX_TRANSPORT_WRITE_PENDING 1
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#define PYX_TRANSPORT_UNKNOWN_SAM_OPCODE -1
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#define PYX_TRANSPORT_HBA_QUEUE_FULL -2
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#define PYX_TRANSPORT_REQ_TOO_MANY_SECTORS -3
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#define PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES -4
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#define PYX_TRANSPORT_INVALID_CDB_FIELD -5
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#define PYX_TRANSPORT_INVALID_PARAMETER_LIST -6
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#define PYX_TRANSPORT_LU_COMM_FAILURE -7
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#define PYX_TRANSPORT_UNKNOWN_MODE_PAGE -8
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#define PYX_TRANSPORT_WRITE_PROTECTED -9
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#define PYX_TRANSPORT_RESERVATION_CONFLICT -10
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#define PYX_TRANSPORT_ILLEGAL_REQUEST -11
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#define PYX_TRANSPORT_USE_SENSE_REASON -12
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#ifndef SAM_STAT_RESERVATION_CONFLICT
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#define SAM_STAT_RESERVATION_CONFLICT 0x18
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#endif
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#define TRANSPORT_PLUGIN_FREE 0
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#define TRANSPORT_PLUGIN_REGISTERED 1
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#define TRANSPORT_PLUGIN_PHBA_PDEV 1
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#define TRANSPORT_PLUGIN_VHBA_PDEV 2
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#define TRANSPORT_PLUGIN_VHBA_VDEV 3
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/*
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* struct se_subsystem_dev->su_dev_flags
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*/
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#define SDF_FIRMWARE_VPD_UNIT_SERIAL 0x00000001
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#define SDF_EMULATED_VPD_UNIT_SERIAL 0x00000002
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#define SDF_USING_UDEV_PATH 0x00000004
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#define SDF_USING_ALIAS 0x00000008
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/*
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* struct se_device->dev_flags
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*/
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#define DF_READ_ONLY 0x00000001
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#define DF_SPC2_RESERVATIONS 0x00000002
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#define DF_SPC2_RESERVATIONS_WITH_ISID 0x00000004
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/* struct se_dev_attrib sanity values */
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/* Default max_unmap_lba_count */
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#define DA_MAX_UNMAP_LBA_COUNT 0
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/* Default max_unmap_block_desc_count */
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#define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
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/* Default unmap_granularity */
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#define DA_UNMAP_GRANULARITY_DEFAULT 0
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/* Default unmap_granularity_alignment */
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#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
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/* Emulation for Direct Page Out */
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#define DA_EMULATE_DPO 0
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/* Emulation for Forced Unit Access WRITEs */
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#define DA_EMULATE_FUA_WRITE 1
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/* Emulation for Forced Unit Access READs */
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#define DA_EMULATE_FUA_READ 0
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/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
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#define DA_EMULATE_WRITE_CACHE 0
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/* Emulation for UNIT ATTENTION Interlock Control */
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#define DA_EMULATE_UA_INTLLCK_CTRL 0
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/* Emulation for TASK_ABORTED status (TAS) by default */
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#define DA_EMULATE_TAS 1
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/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
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#define DA_EMULATE_TPU 0
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/*
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* Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
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* block/blk-lib.c:blkdev_issue_discard()
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*/
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#define DA_EMULATE_TPWS 0
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/* No Emulation for PSCSI by default */
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#define DA_EMULATE_RESERVATIONS 0
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/* No Emulation for PSCSI by default */
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#define DA_EMULATE_ALUA 0
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/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
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#define DA_ENFORCE_PR_ISIDS 1
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#define DA_STATUS_MAX_SECTORS_MIN 16
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#define DA_STATUS_MAX_SECTORS_MAX 8192
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/* By default don't report non-rotating (solid state) medium */
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#define DA_IS_NONROT 0
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/* Queue Algorithm Modifier default for restricted reordering in control mode page */
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#define DA_EMULATE_REST_REORD 0
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#define SE_MODE_PAGE_BUF 512
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#define MOD_MAX_SECTORS(ms, bs) (ms % (PAGE_SIZE / bs))
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struct se_subsystem_api;
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extern int init_se_kmem_caches(void);
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extern void release_se_kmem_caches(void);
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extern u32 scsi_get_new_index(scsi_index_t);
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extern void transport_init_queue_obj(struct se_queue_obj *);
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extern void transport_subsystem_check_init(void);
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extern int transport_subsystem_register(struct se_subsystem_api *);
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extern void transport_subsystem_release(struct se_subsystem_api *);
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extern void transport_load_plugins(void);
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extern struct se_session *transport_init_session(void);
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extern void __transport_register_session(struct se_portal_group *,
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struct se_node_acl *,
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struct se_session *, void *);
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extern void transport_register_session(struct se_portal_group *,
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struct se_node_acl *,
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struct se_session *, void *);
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extern void transport_free_session(struct se_session *);
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extern void transport_deregister_session_configfs(struct se_session *);
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extern void transport_deregister_session(struct se_session *);
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extern void transport_cmd_finish_abort(struct se_cmd *, int);
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extern void transport_complete_sync_cache(struct se_cmd *, int);
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extern void transport_complete_task(struct se_task *, int);
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extern void transport_add_task_to_execute_queue(struct se_task *,
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struct se_task *,
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struct se_device *);
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extern void transport_remove_task_from_execute_queue(struct se_task *,
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struct se_device *);
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extern void __transport_remove_task_from_execute_queue(struct se_task *,
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struct se_device *);
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unsigned char *transport_dump_cmd_direction(struct se_cmd *);
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extern void transport_dump_dev_state(struct se_device *, char *, int *);
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extern void transport_dump_dev_info(struct se_device *, struct se_lun *,
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unsigned long long, char *, int *);
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extern void transport_dump_vpd_proto_id(struct t10_vpd *,
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unsigned char *, int);
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extern void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
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extern int transport_dump_vpd_assoc(struct t10_vpd *,
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unsigned char *, int);
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extern int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
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extern int transport_dump_vpd_ident_type(struct t10_vpd *,
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unsigned char *, int);
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extern int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
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extern int transport_dump_vpd_ident(struct t10_vpd *,
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unsigned char *, int);
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extern int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
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extern struct se_device *transport_add_device_to_core_hba(struct se_hba *,
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struct se_subsystem_api *,
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struct se_subsystem_dev *, u32,
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void *, struct se_dev_limits *,
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const char *, const char *);
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extern void transport_init_se_cmd(struct se_cmd *,
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struct target_core_fabric_ops *,
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struct se_session *, u32, int, int,
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unsigned char *);
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void *transport_kmap_first_data_page(struct se_cmd *cmd);
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void transport_kunmap_first_data_page(struct se_cmd *cmd);
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extern int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
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extern int transport_handle_cdb_direct(struct se_cmd *);
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extern int transport_generic_handle_cdb_map(struct se_cmd *);
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extern int transport_generic_handle_data(struct se_cmd *);
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extern void transport_new_cmd_failure(struct se_cmd *);
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extern int transport_generic_handle_tmr(struct se_cmd *);
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extern bool target_stop_task(struct se_task *task, unsigned long *flags);
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extern int transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *, u32,
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struct scatterlist *, u32);
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extern int transport_clear_lun_from_sessions(struct se_lun *);
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extern bool transport_wait_for_tasks(struct se_cmd *);
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extern int transport_check_aborted_status(struct se_cmd *, int);
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extern int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
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extern void transport_send_task_abort(struct se_cmd *);
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extern void transport_release_cmd(struct se_cmd *);
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extern void transport_generic_free_cmd(struct se_cmd *, int);
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extern void target_get_sess_cmd(struct se_session *, struct se_cmd *);
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extern int target_put_sess_cmd(struct se_session *, struct se_cmd *);
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extern void target_splice_sess_cmd_list(struct se_session *);
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extern void target_wait_for_sess_cmds(struct se_session *, int);
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extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
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extern void transport_do_task_sg_chain(struct se_cmd *);
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extern void transport_generic_process_write(struct se_cmd *);
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extern int transport_generic_new_cmd(struct se_cmd *);
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extern int transport_generic_do_tmr(struct se_cmd *);
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/* From target_core_alua.c */
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extern int core_alua_check_nonop_delay(struct se_cmd *);
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/* From target_core_cdb.c */
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extern int transport_emulate_control_cdb(struct se_task *);
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extern void target_get_task_cdb(struct se_task *task, unsigned char *cdb);
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/*
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* Each se_transport_task_t can have N number of possible struct se_task's
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* for the storage transport(s) to possibly execute.
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* Used primarily for splitting up CDBs that exceed the physical storage
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* HBA's maximum sector count per task.
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*/
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struct se_mem {
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struct page *se_page;
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u32 se_len;
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u32 se_off;
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struct list_head se_list;
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} ____cacheline_aligned;
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/*
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* Each type of disk transport supported MUST have a template defined
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* within its .h file.
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*/
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struct se_subsystem_api {
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/*
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* The Name. :-)
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*/
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char name[16];
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/*
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* Transport Type.
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*/
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u8 transport_type;
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unsigned int fua_write_emulated : 1;
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unsigned int write_cache_emulated : 1;
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/*
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* struct module for struct se_hba references
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*/
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struct module *owner;
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/*
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* Used for global se_subsystem_api list_head
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*/
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struct list_head sub_api_list;
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/*
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* attach_hba():
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*/
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int (*attach_hba)(struct se_hba *, u32);
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/*
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* detach_hba():
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*/
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void (*detach_hba)(struct se_hba *);
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/*
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* pmode_hba(): Used for TCM/pSCSI subsystem plugin HBA ->
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* Linux/SCSI struct Scsi_Host passthrough
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*/
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int (*pmode_enable_hba)(struct se_hba *, unsigned long);
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/*
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* allocate_virtdevice():
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*/
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void *(*allocate_virtdevice)(struct se_hba *, const char *);
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/*
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* create_virtdevice(): Only for Virtual HBAs
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*/
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struct se_device *(*create_virtdevice)(struct se_hba *,
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struct se_subsystem_dev *, void *);
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/*
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* free_device():
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*/
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void (*free_device)(void *);
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/*
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* transport_complete():
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*
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* Use transport_generic_complete() for majority of DAS transport
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* drivers. Provided out of convenience.
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*/
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int (*transport_complete)(struct se_task *task);
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struct se_task *(*alloc_task)(unsigned char *cdb);
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/*
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* do_task():
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*/
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int (*do_task)(struct se_task *);
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/*
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* Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
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* UNMAP and WRITE_SAME_* w/ UNMAP=1 <-> Linux/Block Discard
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*/
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int (*do_discard)(struct se_device *, sector_t, u32);
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/*
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* Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
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* SYNCHRONIZE_CACHE_* <-> Linux/Block blkdev_issue_flush()
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*/
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void (*do_sync_cache)(struct se_task *);
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/*
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* free_task():
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*/
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void (*free_task)(struct se_task *);
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/*
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* check_configfs_dev_params():
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*/
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ssize_t (*check_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *);
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/*
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* set_configfs_dev_params():
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*/
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ssize_t (*set_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
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const char *, ssize_t);
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/*
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* show_configfs_dev_params():
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*/
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ssize_t (*show_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
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char *);
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/*
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* get_device_rev():
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*/
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u32 (*get_device_rev)(struct se_device *);
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/*
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* get_device_type():
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*/
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u32 (*get_device_type)(struct se_device *);
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/*
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* Get the sector_t from a subsystem backstore..
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*/
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sector_t (*get_blocks)(struct se_device *);
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/*
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* get_sense_buffer():
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*/
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unsigned char *(*get_sense_buffer)(struct se_task *);
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} ____cacheline_aligned;
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#endif /* TARGET_CORE_TRANSPORT_H */
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