[deliverable/linux.git] / include / target / target_core_transport.h

#ifndef TARGET_CORE_TRANSPORT_H
#define TARGET_CORE_TRANSPORT_H

#define TARGET_CORE_VERSION			TARGET_CORE_MOD_VERSION

/* Attempts before moving from SHORT to LONG */
#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD	3
#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT	3  /* In milliseconds */
#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG	10 /* In milliseconds */

#define PYX_TRANSPORT_STATUS_INTERVAL		5 /* In seconds */

#define PYX_TRANSPORT_SENT_TO_TRANSPORT		0
#define PYX_TRANSPORT_WRITE_PENDING		1

#define PYX_TRANSPORT_UNKNOWN_SAM_OPCODE	-1
#define PYX_TRANSPORT_HBA_QUEUE_FULL		-2
#define PYX_TRANSPORT_REQ_TOO_MANY_SECTORS	-3
#define PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES	-4
#define PYX_TRANSPORT_INVALID_CDB_FIELD		-5
#define PYX_TRANSPORT_INVALID_PARAMETER_LIST	-6
#define PYX_TRANSPORT_LU_COMM_FAILURE		-7
#define PYX_TRANSPORT_UNKNOWN_MODE_PAGE		-8
#define PYX_TRANSPORT_WRITE_PROTECTED		-9
#define PYX_TRANSPORT_TASK_TIMEOUT		-10
#define PYX_TRANSPORT_RESERVATION_CONFLICT	-11
#define PYX_TRANSPORT_ILLEGAL_REQUEST		-12
#define PYX_TRANSPORT_USE_SENSE_REASON		-13

#ifndef SAM_STAT_RESERVATION_CONFLICT
#define SAM_STAT_RESERVATION_CONFLICT		0x18
#endif

#define TRANSPORT_PLUGIN_FREE			0
#define TRANSPORT_PLUGIN_REGISTERED		1

#define TRANSPORT_PLUGIN_PHBA_PDEV		1
#define TRANSPORT_PLUGIN_VHBA_PDEV		2
#define TRANSPORT_PLUGIN_VHBA_VDEV		3

/* For SE OBJ Plugins, in seconds */
#define TRANSPORT_TIMEOUT_TUR			10
#define TRANSPORT_TIMEOUT_TYPE_DISK		60
#define TRANSPORT_TIMEOUT_TYPE_ROM		120
#define TRANSPORT_TIMEOUT_TYPE_TAPE		600
#define TRANSPORT_TIMEOUT_TYPE_OTHER		300

/* For se_task->task_state_flags */
#define TSF_EXCEPTION_CLEARED			0x01

/*
 * struct se_subsystem_dev->su_dev_flags
*/
#define SDF_FIRMWARE_VPD_UNIT_SERIAL		0x00000001
#define SDF_EMULATED_VPD_UNIT_SERIAL		0x00000002
#define SDF_USING_UDEV_PATH			0x00000004
#define SDF_USING_ALIAS				0x00000008

/*
 * struct se_device->dev_flags
 */
#define DF_READ_ONLY				0x00000001
#define DF_SPC2_RESERVATIONS			0x00000002
#define DF_SPC2_RESERVATIONS_WITH_ISID		0x00000004

/* struct se_dev_attrib sanity values */
/* 10 Minutes */
#define DA_TASK_TIMEOUT_MAX			600
/* Default max_unmap_lba_count */
#define DA_MAX_UNMAP_LBA_COUNT			0
/* Default max_unmap_block_desc_count */
#define DA_MAX_UNMAP_BLOCK_DESC_COUNT		0
/* Default unmap_granularity */
#define DA_UNMAP_GRANULARITY_DEFAULT		0
/* Default unmap_granularity_alignment */
#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT	0
/* Emulation for Direct Page Out */
#define DA_EMULATE_DPO				0
/* Emulation for Forced Unit Access WRITEs */
#define DA_EMULATE_FUA_WRITE			1
/* Emulation for Forced Unit Access READs */
#define DA_EMULATE_FUA_READ			0
/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
#define DA_EMULATE_WRITE_CACHE			0
/* Emulation for UNIT ATTENTION Interlock Control */
#define DA_EMULATE_UA_INTLLCK_CTRL		0
/* Emulation for TASK_ABORTED status (TAS) by default */
#define DA_EMULATE_TAS				1
/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
#define DA_EMULATE_TPU				0
/*
 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
 * block/blk-lib.c:blkdev_issue_discard()
 */
#define DA_EMULATE_TPWS				0
/* No Emulation for PSCSI by default */
#define DA_EMULATE_RESERVATIONS			0
/* No Emulation for PSCSI by default */
#define DA_EMULATE_ALUA				0
/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
#define DA_ENFORCE_PR_ISIDS			1
#define DA_STATUS_MAX_SECTORS_MIN		16
#define DA_STATUS_MAX_SECTORS_MAX		8192

#define SE_MODE_PAGE_BUF			512

#define MOD_MAX_SECTORS(ms, bs)			(ms % (PAGE_SIZE / bs))

struct se_mem;
struct se_subsystem_api;

extern struct kmem_cache *se_mem_cache;

extern int init_se_kmem_caches(void);
extern void release_se_kmem_caches(void);
extern u32 scsi_get_new_index(scsi_index_t);
extern void transport_init_queue_obj(struct se_queue_obj *);
extern int transport_subsystem_check_init(void);
extern int transport_subsystem_register(struct se_subsystem_api *);
extern void transport_subsystem_release(struct se_subsystem_api *);
extern void transport_load_plugins(void);
extern struct se_session *transport_init_session(void);
extern void __transport_register_session(struct se_portal_group *,
					struct se_node_acl *,
					struct se_session *, void *);
extern void transport_register_session(struct se_portal_group *,
					struct se_node_acl *,
					struct se_session *, void *);
extern void transport_free_session(struct se_session *);
extern void transport_deregister_session_configfs(struct se_session *);
extern void transport_deregister_session(struct se_session *);
extern void transport_cmd_finish_abort(struct se_cmd *, int);
extern void transport_cmd_finish_abort_tmr(struct se_cmd *);
extern void transport_complete_sync_cache(struct se_cmd *, int);
extern void transport_complete_task(struct se_task *, int);
extern void transport_add_task_to_execute_queue(struct se_task *,
						struct se_task *,
						struct se_device *);
extern void transport_remove_task_from_execute_queue(struct se_task *,
						struct se_device *);
unsigned char *transport_dump_cmd_direction(struct se_cmd *);
extern void transport_dump_dev_state(struct se_device *, char *, int *);
extern void transport_dump_dev_info(struct se_device *, struct se_lun *,
					unsigned long long, char *, int *);
extern void transport_dump_vpd_proto_id(struct t10_vpd *,
					unsigned char *, int);
extern void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
extern int transport_dump_vpd_assoc(struct t10_vpd *,
					unsigned char *, int);
extern int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
extern int transport_dump_vpd_ident_type(struct t10_vpd *,
					unsigned char *, int);
extern int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
extern int transport_dump_vpd_ident(struct t10_vpd *,
					unsigned char *, int);
extern int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
extern struct se_device *transport_add_device_to_core_hba(struct se_hba *,
					struct se_subsystem_api *,
					struct se_subsystem_dev *, u32,
					void *, struct se_dev_limits *,
					const char *, const char *);
extern void transport_init_se_cmd(struct se_cmd *,
					struct target_core_fabric_ops *,
					struct se_session *, u32, int, int,
					unsigned char *);
extern void transport_free_se_cmd(struct se_cmd *);
extern int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
extern int transport_generic_handle_cdb(struct se_cmd *);
extern int transport_generic_handle_cdb_map(struct se_cmd *);
extern int transport_generic_handle_data(struct se_cmd *);
extern void transport_new_cmd_failure(struct se_cmd *);
extern int transport_generic_handle_tmr(struct se_cmd *);
extern void transport_generic_free_cmd_intr(struct se_cmd *);
extern void __transport_stop_task_timer(struct se_task *, unsigned long *);
extern unsigned char transport_asciihex_to_binaryhex(unsigned char val[2]);
extern int transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *, u32,
				struct scatterlist *, u32);
extern int transport_clear_lun_from_sessions(struct se_lun *);
extern int transport_check_aborted_status(struct se_cmd *, int);
extern int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
extern void transport_send_task_abort(struct se_cmd *);
extern void transport_release_cmd_to_pool(struct se_cmd *);
extern void transport_generic_free_cmd(struct se_cmd *, int, int, int);
extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
extern int transport_init_task_sg(struct se_task *, struct se_mem *, u32);
extern int transport_map_mem_to_sg(struct se_task *, struct list_head *,
					struct scatterlist *, struct se_mem *,
					struct se_mem **, u32 *, u32 *);
extern void transport_do_task_sg_chain(struct se_cmd *);
extern void transport_generic_process_write(struct se_cmd *);
extern int transport_generic_new_cmd(struct se_cmd *);
extern int transport_generic_do_tmr(struct se_cmd *);
/* From target_core_alua.c */
extern int core_alua_check_nonop_delay(struct se_cmd *);
/* From target_core_cdb.c */
extern int transport_emulate_control_cdb(struct se_task *);

/*
 * Each se_transport_task_t can have N number of possible struct se_task's
 * for the storage transport(s) to possibly execute.
 * Used primarily for splitting up CDBs that exceed the physical storage
 * HBA's maximum sector count per task.
 */
struct se_mem {
	struct page	*se_page;
	u32		se_len;
	u32		se_off;
	struct list_head se_list;
} ____cacheline_aligned;

/*
 * 	Each type of disk transport supported MUST have a template defined
 *	within its .h file.
 */
struct se_subsystem_api {
	/*
	 * The Name. :-)
	 */
	char name[16];
	/*
	 * Transport Type.
	 */
	u8 transport_type;
	/*
	 * struct module for struct se_hba references
	 */
	struct module *owner;
	/*
	 * Used for global se_subsystem_api list_head
	 */
	struct list_head sub_api_list;
	/*
	 * For SCF_SCSI_NON_DATA_CDB
	 */
	int (*cdb_none)(struct se_task *);
	/*
	 * For SCF_SCSI_CONTROL_NONSG_IO_CDB
	 */
	int (*map_task_non_SG)(struct se_task *);
	/*
	 * For SCF_SCSI_DATA_SG_IO_CDB and SCF_SCSI_CONTROL_SG_IO_CDB
	 */
	int (*map_task_SG)(struct se_task *);
	/*
	 * attach_hba():
	 */
	int (*attach_hba)(struct se_hba *, u32);
	/*
	 * detach_hba():
	 */
	void (*detach_hba)(struct se_hba *);
	/*
	 * pmode_hba(): Used for TCM/pSCSI subsystem plugin HBA ->
	 *		Linux/SCSI struct Scsi_Host passthrough
	*/
	int (*pmode_enable_hba)(struct se_hba *, unsigned long);
	/*
	 * allocate_virtdevice():
	 */
	void *(*allocate_virtdevice)(struct se_hba *, const char *);
	/*
	 * create_virtdevice(): Only for Virtual HBAs
	 */
	struct se_device *(*create_virtdevice)(struct se_hba *,
				struct se_subsystem_dev *, void *);
	/*
	 * free_device():
	 */
	void (*free_device)(void *);

	/*
	 * dpo_emulated():
	 */
	int (*dpo_emulated)(struct se_device *);
	/*
	 * fua_write_emulated():
	 */
	int (*fua_write_emulated)(struct se_device *);
	/*
	 * fua_read_emulated():
	 */
	int (*fua_read_emulated)(struct se_device *);
	/*
	 * write_cache_emulated():
	 */
	int (*write_cache_emulated)(struct se_device *);
	/*
	 * transport_complete():
	 *
	 * Use transport_generic_complete() for majority of DAS transport
	 * drivers.  Provided out of convenience.
	 */
	int (*transport_complete)(struct se_task *task);
	struct se_task *(*alloc_task)(struct se_cmd *);
	/*
	 * do_task():
	 */
	int (*do_task)(struct se_task *);
	/*
	 * Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
	 * UNMAP and WRITE_SAME_* w/ UNMAP=1 <-> Linux/Block Discard
	 */
	int (*do_discard)(struct se_device *, sector_t, u32);
	/*
	 * Used  by virtual subsystem plugins IBLOCK and FILEIO to emulate
	 * SYNCHRONIZE_CACHE_* <-> Linux/Block blkdev_issue_flush()
	 */
	void (*do_sync_cache)(struct se_task *);
	/*
	 * free_task():
	 */
	void (*free_task)(struct se_task *);
	/*
	 * check_configfs_dev_params():
	 */
	ssize_t (*check_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *);
	/*
	 * set_configfs_dev_params():
	 */
	ssize_t (*set_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
						const char *, ssize_t);
	/*
	 * show_configfs_dev_params():
	 */
	ssize_t (*show_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
						char *);
	/*
	 * get_cdb():
	 */
	unsigned char *(*get_cdb)(struct se_task *);
	/*
	 * get_device_rev():
	 */
	u32 (*get_device_rev)(struct se_device *);
	/*
	 * get_device_type():
	 */
	u32 (*get_device_type)(struct se_device *);
	/*
	 * Get the sector_t from a subsystem backstore..
	 */
	sector_t (*get_blocks)(struct se_device *);
	/*
	 * do_se_mem_map():
	 */
	int (*do_se_mem_map)(struct se_task *, struct list_head *, void *,
				struct se_mem *, struct se_mem **, u32 *, u32 *);
	/*
	 * get_sense_buffer():
	 */
	unsigned char *(*get_sense_buffer)(struct se_task *);
} ____cacheline_aligned;

#endif /* TARGET_CORE_TRANSPORT_H */
Commit	Line	Data
c66ac9db NB	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
5dd7ed2e DC	112	extern struct kmem_cache *se_mem_cache;
5dd7ed2e DC	113
e3d6f909 AG	114	extern int init_se_kmem_caches(void);
e3d6f909 AG	115	extern void release_se_kmem_caches(void);
e89d15ee	116	extern u32 scsi_get_new_index(scsi_index_t);
c66ac9db NB	117	extern void transport_init_queue_obj(struct se_queue_obj *);
	118	extern int transport_subsystem_check_init(void);
	119	extern int transport_subsystem_register(struct se_subsystem_api *);
	120	extern void transport_subsystem_release(struct se_subsystem_api *);
	121	extern void transport_load_plugins(void);
	122	extern struct se_session *transport_init_session(void);
	123	extern void __transport_register_session(struct se_portal_group *,
	124	struct se_node_acl *,
	125	struct se_session , void );
	126	extern void transport_register_session(struct se_portal_group *,
	127	struct se_node_acl *,
	128	struct se_session , void );
	129	extern void transport_free_session(struct se_session *);
	130	extern void transport_deregister_session_configfs(struct se_session *);
	131	extern void transport_deregister_session(struct se_session *);
	132	extern void transport_cmd_finish_abort(struct se_cmd *, int);
	133	extern void transport_cmd_finish_abort_tmr(struct se_cmd *);
	134	extern void transport_complete_sync_cache(struct se_cmd *, int);
	135	extern void transport_complete_task(struct se_task *, int);
	136	extern void transport_add_task_to_execute_queue(struct se_task *,
	137	struct se_task *,
	138	struct se_device *);
52208ae3 NB	139	extern void transport_remove_task_from_execute_queue(struct se_task *,
52208ae3 NB	140	struct se_device *);
c66ac9db NB	141	unsigned char transport_dump_cmd_direction(struct se_cmd );
	142	extern void transport_dump_dev_state(struct se_device , char , int *);
	143	extern void transport_dump_dev_info(struct se_device , struct se_lun ,
	144	unsigned long long, char , int );
	145	extern void transport_dump_vpd_proto_id(struct t10_vpd *,
	146	unsigned char *, int);
	147	extern void transport_set_vpd_proto_id(struct t10_vpd , unsigned char );
	148	extern int transport_dump_vpd_assoc(struct t10_vpd *,
	149	unsigned char *, int);
	150	extern int transport_set_vpd_assoc(struct t10_vpd , unsigned char );
	151	extern int transport_dump_vpd_ident_type(struct t10_vpd *,
	152	unsigned char *, int);
	153	extern int transport_set_vpd_ident_type(struct t10_vpd , unsigned char );
	154	extern int transport_dump_vpd_ident(struct t10_vpd *,
	155	unsigned char *, int);
	156	extern int transport_set_vpd_ident(struct t10_vpd , unsigned char );
	157	extern struct se_device transport_add_device_to_core_hba(struct se_hba ,
	158	struct se_subsystem_api *,
	159	struct se_subsystem_dev *, u32,
	160	void , struct se_dev_limits ,
	161	const char , const char );
c66ac9db NB	162	extern void transport_init_se_cmd(struct se_cmd *,
	163	struct target_core_fabric_ops *,
	164	struct se_session *, u32, int, int,
	165	unsigned char *);
	166	extern void transport_free_se_cmd(struct se_cmd *);
	167	extern int transport_generic_allocate_tasks(struct se_cmd , unsigned char );
	168	extern int transport_generic_handle_cdb(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 *);
f4366772	173	extern void transport_generic_free_cmd_intr(struct se_cmd *);
c66ac9db NB	174	extern void __transport_stop_task_timer(struct se_task , unsigned long );
	175	extern unsigned char transport_asciihex_to_binaryhex(unsigned char val[2]);
	176	extern int transport_generic_map_mem_to_cmd(struct se_cmd cmd, struct scatterlist , u32,
	177	struct scatterlist *, u32);
	178	extern int transport_clear_lun_from_sessions(struct se_lun *);
	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_to_pool(struct se_cmd *);
	183	extern void transport_generic_free_cmd(struct se_cmd *, int, int, int);
	184	extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
e3d6f909	185	extern int transport_init_task_sg(struct se_task , struct se_mem , u32);
c66ac9db	186	extern int transport_map_mem_to_sg(struct se_task , struct list_head ,
a1d8b49a	187	struct scatterlist , struct se_mem ,
c66ac9db NB	188	struct se_mem *, u32 , u32 *);
	189	extern void transport_do_task_sg_chain(struct se_cmd *);
	190	extern void transport_generic_process_write(struct se_cmd *);
a1d8b49a	191	extern int transport_generic_new_cmd(struct se_cmd *);
c66ac9db NB	192	extern int transport_generic_do_tmr(struct se_cmd *);
	193	/* From target_core_alua.c */
	194	extern int core_alua_check_nonop_delay(struct se_cmd *);
5dd7ed2e DC	195	/* From target_core_cdb.c */
5dd7ed2e DC	196	extern int transport_emulate_control_cdb(struct se_task *);
c66ac9db NB	197
	198	/*
	199	* Each se_transport_task_t can have N number of possible struct se_task's
	200	* for the storage transport(s) to possibly execute.
	201	* Used primarily for splitting up CDBs that exceed the physical storage
	202	* HBA's maximum sector count per task.
	203	*/
	204	struct se_mem {
	205	struct page *se_page;
	206	u32 se_len;
	207	u32 se_off;
	208	struct list_head se_list;
	209	} ____cacheline_aligned;
	210
	211	/*
	212	* Each type of disk transport supported MUST have a template defined
	213	* within its .h file.
	214	*/
	215	struct se_subsystem_api {
	216	/*
	217	* The Name. :-)
	218	*/
	219	char name[16];
	220	/*
	221	* Transport Type.
	222	*/
	223	u8 transport_type;
	224	/*
	225	* struct module for struct se_hba references
	226	*/
	227	struct module *owner;
	228	/*
	229	* Used for global se_subsystem_api list_head
	230	*/
	231	struct list_head sub_api_list;
	232	/*
	233	* For SCF_SCSI_NON_DATA_CDB
	234	*/
	235	int (cdb_none)(struct se_task );
	236	/*
	237	* For SCF_SCSI_CONTROL_NONSG_IO_CDB
	238	*/
	239	int (map_task_non_SG)(struct se_task );
	240	/*
	241	* For SCF_SCSI_DATA_SG_IO_CDB and SCF_SCSI_CONTROL_SG_IO_CDB
	242	*/
	243	int (map_task_SG)(struct se_task );
	244	/*
	245	* attach_hba():
	246	*/
	247	int (attach_hba)(struct se_hba , u32);
	248	/*
	249	* detach_hba():
	250	*/
	251	void (detach_hba)(struct se_hba );
	252	/*
	253	* pmode_hba(): Used for TCM/pSCSI subsystem plugin HBA ->
	254	* Linux/SCSI struct Scsi_Host passthrough
	255	*/
	256	int (pmode_enable_hba)(struct se_hba , unsigned long);
	257	/*
	258	* allocate_virtdevice():
	259	*/
	260	void (allocate_virtdevice)(struct se_hba , const char );
261	/*
262	* create_virtdevice(): Only for Virtual HBAs
263	*/
264	struct se_device (create_virtdevice)(struct se_hba *,
265	struct se_subsystem_dev , void );
266	/*
267	* free_device():
268	*/
269	void (free_device)(void );
270
271	/*
272	* dpo_emulated():
273	*/
274	int (dpo_emulated)(struct se_device );
275	/*
276	* fua_write_emulated():
277	*/
278	int (fua_write_emulated)(struct se_device );
279	/*
280	* fua_read_emulated():
281	*/
282	int (fua_read_emulated)(struct se_device );
283	/*
284	* write_cache_emulated():
285	*/
286	int (write_cache_emulated)(struct se_device );
287	/*
288	* transport_complete():
289	*
290	* Use transport_generic_complete() for majority of DAS transport
291	* drivers. Provided out of convenience.
292	*/
293	int (transport_complete)(struct se_task task);
294	struct se_task (alloc_task)(struct se_cmd *);
295	/*
296	* do_task():
297	*/
298	int (do_task)(struct se_task );
299	/*
300	* Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
301	* UNMAP and WRITE_SAME_* w/ UNMAP=1 <-> Linux/Block Discard
302	*/
303	int (do_discard)(struct se_device , sector_t, u32);
304	/*
305	* Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
306	* SYNCHRONIZE_CACHE_* <-> Linux/Block blkdev_issue_flush()
307	*/
308	void (do_sync_cache)(struct se_task );
309	/*
310	* free_task():
311	*/
312	void (free_task)(struct se_task );
313	/*
314	* check_configfs_dev_params():
315	*/
316	ssize_t (check_configfs_dev_params)(struct se_hba , struct se_subsystem_dev *);
317	/*
318	* set_configfs_dev_params():
319	*/
320	ssize_t (set_configfs_dev_params)(struct se_hba , struct se_subsystem_dev *,
321	const char *, ssize_t);
322	/*
323	* show_configfs_dev_params():
324	*/
325	ssize_t (show_configfs_dev_params)(struct se_hba , struct se_subsystem_dev *,
326	char *);
327	/*
328	* get_cdb():
329	*/
330	unsigned char (get_cdb)(struct se_task *);
331	/*
332	* get_device_rev():
333	*/
334	u32 (get_device_rev)(struct se_device );
335	/*
336	* get_device_type():
337	*/
338	u32 (get_device_type)(struct se_device );
339	/*
340	* Get the sector_t from a subsystem backstore..
341	*/
342	sector_t (get_blocks)(struct se_device );
343	/*
344	* do_se_mem_map():
345	*/
346	int (do_se_mem_map)(struct se_task , struct list_head , void ,
347	struct se_mem , struct se_mem , u32 , u32 *);
348	/*
349	* get_sense_buffer():
350	*/
351	unsigned char (get_sense_buffer)(struct se_task *);
352	} ____cacheline_aligned;
353
c66ac9db	354	#endif /* TARGET_CORE_TRANSPORT_H */