1 #ifndef TARGET_CORE_TRANSPORT_H
2 #define TARGET_CORE_TRANSPORT_H
4 #define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION
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 */
11 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
13 #define PYX_TRANSPORT_SENT_TO_TRANSPORT 0
14 #define PYX_TRANSPORT_WRITE_PENDING 1
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
30 #ifndef SAM_STAT_RESERVATION_CONFLICT
31 #define SAM_STAT_RESERVATION_CONFLICT 0x18
34 #define TRANSPORT_PLUGIN_FREE 0
35 #define TRANSPORT_PLUGIN_REGISTERED 1
37 #define TRANSPORT_PLUGIN_PHBA_PDEV 1
38 #define TRANSPORT_PLUGIN_VHBA_PDEV 2
39 #define TRANSPORT_PLUGIN_VHBA_VDEV 3
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
48 /* For se_task->task_state_flags */
49 #define TSF_EXCEPTION_CLEARED 0x01
52 * struct se_subsystem_dev->su_dev_flags
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
60 * struct se_device->dev_flags
62 #define DF_READ_ONLY 0x00000001
63 #define DF_SPC2_RESERVATIONS 0x00000002
64 #define DF_SPC2_RESERVATIONS_WITH_ISID 0x00000004
66 /* struct se_dev_attrib sanity values */
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
92 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
93 * block/blk-lib.c:blkdev_issue_discard()
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
109 #define SE_MODE_PAGE_BUF 512
111 #define MOD_MAX_SECTORS(ms, bs) (ms % (PAGE_SIZE / bs))
114 struct se_subsystem_api;
116 extern struct kmem_cache *se_mem_cache;
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 *,
143 extern void transport_remove_task_from_execute_queue(struct se_task *,
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,
170 void *transport_kmap_first_data_page(struct se_cmd *cmd);
171 void transport_kunmap_first_data_page(struct se_cmd *cmd);
172 extern int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
173 extern int transport_handle_cdb_direct(struct se_cmd *);
174 extern int transport_generic_handle_cdb_map(struct se_cmd *);
175 extern int transport_generic_handle_data(struct se_cmd *);
176 extern void transport_new_cmd_failure(struct se_cmd *);
177 extern int transport_generic_handle_tmr(struct se_cmd *);
178 extern void transport_generic_free_cmd_intr(struct se_cmd *);
179 extern void __transport_stop_task_timer(struct se_task *, unsigned long *);
180 extern int transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *, u32,
181 struct scatterlist *, u32);
182 extern int transport_clear_lun_from_sessions(struct se_lun *);
183 extern void transport_wait_for_tasks(struct se_cmd *);
184 extern int transport_check_aborted_status(struct se_cmd *, int);
185 extern int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
186 extern void transport_send_task_abort(struct se_cmd *);
187 extern void transport_release_cmd(struct se_cmd *);
188 extern void transport_generic_free_cmd(struct se_cmd *, int);
189 extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
190 extern int transport_init_task_sg(struct se_task *, struct se_mem *, u32);
191 extern int transport_map_mem_to_sg(struct se_task *, struct list_head *,
192 struct scatterlist *, struct se_mem *,
193 struct se_mem **, u32 *, u32 *);
194 extern void transport_do_task_sg_chain(struct se_cmd *);
195 extern void transport_generic_process_write(struct se_cmd *);
196 extern int transport_generic_new_cmd(struct se_cmd *);
197 extern int transport_generic_do_tmr(struct se_cmd *);
198 /* From target_core_alua.c */
199 extern int core_alua_check_nonop_delay(struct se_cmd *);
200 /* From target_core_cdb.c */
201 extern int transport_emulate_control_cdb(struct se_task *);
204 * Each se_transport_task_t can have N number of possible struct se_task's
205 * for the storage transport(s) to possibly execute.
206 * Used primarily for splitting up CDBs that exceed the physical storage
207 * HBA's maximum sector count per task.
210 struct page *se_page;
213 struct list_head se_list;
214 } ____cacheline_aligned;
217 * Each type of disk transport supported MUST have a template defined
218 * within its .h file.
220 struct se_subsystem_api {
230 * struct module for struct se_hba references
232 struct module *owner;
234 * Used for global se_subsystem_api list_head
236 struct list_head sub_api_list;
240 int (*attach_hba)(struct se_hba *, u32);
244 void (*detach_hba)(struct se_hba *);
246 * pmode_hba(): Used for TCM/pSCSI subsystem plugin HBA ->
247 * Linux/SCSI struct Scsi_Host passthrough
249 int (*pmode_enable_hba)(struct se_hba *, unsigned long);
251 * allocate_virtdevice():
253 void *(*allocate_virtdevice)(struct se_hba *, const char *);
255 * create_virtdevice(): Only for Virtual HBAs
257 struct se_device *(*create_virtdevice)(struct se_hba *,
258 struct se_subsystem_dev *, void *);
262 void (*free_device)(void *);
267 int (*dpo_emulated)(struct se_device *);
269 * fua_write_emulated():
271 int (*fua_write_emulated)(struct se_device *);
273 * fua_read_emulated():
275 int (*fua_read_emulated)(struct se_device *);
277 * write_cache_emulated():
279 int (*write_cache_emulated)(struct se_device *);
281 * transport_complete():
283 * Use transport_generic_complete() for majority of DAS transport
284 * drivers. Provided out of convenience.
286 int (*transport_complete)(struct se_task *task);
287 struct se_task *(*alloc_task)(unsigned char *cdb);
291 int (*do_task)(struct se_task *);
293 * Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
294 * UNMAP and WRITE_SAME_* w/ UNMAP=1 <-> Linux/Block Discard
296 int (*do_discard)(struct se_device *, sector_t, u32);
298 * Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
299 * SYNCHRONIZE_CACHE_* <-> Linux/Block blkdev_issue_flush()
301 void (*do_sync_cache)(struct se_task *);
305 void (*free_task)(struct se_task *);
307 * check_configfs_dev_params():
309 ssize_t (*check_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *);
311 * set_configfs_dev_params():
313 ssize_t (*set_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
314 const char *, ssize_t);
316 * show_configfs_dev_params():
318 ssize_t (*show_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
323 unsigned char *(*get_cdb)(struct se_task *);
327 u32 (*get_device_rev)(struct se_device *);
331 u32 (*get_device_type)(struct se_device *);
333 * Get the sector_t from a subsystem backstore..
335 sector_t (*get_blocks)(struct se_device *);
337 * get_sense_buffer():
339 unsigned char *(*get_sense_buffer)(struct se_task *);
340 } ____cacheline_aligned;
342 #endif /* TARGET_CORE_TRANSPORT_H */