xref: /linux/include/target/target_core_backend.h (revision 26b0d14106954ae46d2f4f7eec3481828a210f7d)
1 #ifndef TARGET_CORE_BACKEND_H
2 #define TARGET_CORE_BACKEND_H
3 
4 #define TRANSPORT_PLUGIN_PHBA_PDEV		1
5 #define TRANSPORT_PLUGIN_VHBA_PDEV		2
6 #define TRANSPORT_PLUGIN_VHBA_VDEV		3
7 
8 struct se_subsystem_api {
9 	struct list_head sub_api_list;
10 
11 	char name[16];
12 	struct module *owner;
13 
14 	u8 transport_type;
15 
16 	unsigned int fua_write_emulated : 1;
17 	unsigned int write_cache_emulated : 1;
18 
19 	int (*attach_hba)(struct se_hba *, u32);
20 	void (*detach_hba)(struct se_hba *);
21 	int (*pmode_enable_hba)(struct se_hba *, unsigned long);
22 	void *(*allocate_virtdevice)(struct se_hba *, const char *);
23 	struct se_device *(*create_virtdevice)(struct se_hba *,
24 				struct se_subsystem_dev *, void *);
25 	void (*free_device)(void *);
26 	int (*transport_complete)(struct se_cmd *cmd, struct scatterlist *);
27 	int (*execute_cmd)(struct se_cmd *, struct scatterlist *, u32,
28 			enum dma_data_direction);
29 	int (*do_discard)(struct se_device *, sector_t, u32);
30 	void (*do_sync_cache)(struct se_cmd *);
31 	ssize_t (*check_configfs_dev_params)(struct se_hba *,
32 			struct se_subsystem_dev *);
33 	ssize_t (*set_configfs_dev_params)(struct se_hba *,
34 			struct se_subsystem_dev *, const char *, ssize_t);
35 	ssize_t (*show_configfs_dev_params)(struct se_hba *,
36 			struct se_subsystem_dev *, char *);
37 	u32 (*get_device_rev)(struct se_device *);
38 	u32 (*get_device_type)(struct se_device *);
39 	sector_t (*get_blocks)(struct se_device *);
40 	unsigned char *(*get_sense_buffer)(struct se_cmd *);
41 };
42 
43 int	transport_subsystem_register(struct se_subsystem_api *);
44 void	transport_subsystem_release(struct se_subsystem_api *);
45 
46 struct se_device *transport_add_device_to_core_hba(struct se_hba *,
47 		struct se_subsystem_api *, struct se_subsystem_dev *, u32,
48 		void *, struct se_dev_limits *, const char *, const char *);
49 
50 void	target_complete_cmd(struct se_cmd *, u8);
51 
52 void	transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
53 int	transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
54 int	transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
55 int	transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
56 
57 /* core helpers also used by command snooping in pscsi */
58 void	*transport_kmap_data_sg(struct se_cmd *);
59 void	transport_kunmap_data_sg(struct se_cmd *);
60 
61 void	array_free(void *array, int n);
62 
63 #endif /* TARGET_CORE_BACKEND_H */
64