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 target_backend_cits {
9 	struct config_item_type tb_dev_cit;
10 	struct config_item_type tb_dev_attrib_cit;
11 	struct config_item_type tb_dev_pr_cit;
12 	struct config_item_type tb_dev_wwn_cit;
13 	struct config_item_type tb_dev_alua_tg_pt_gps_cit;
14 	struct config_item_type tb_dev_stat_cit;
15 };
16 
17 struct se_subsystem_api {
18 	struct list_head sub_api_list;
19 
20 	char name[16];
21 	char inquiry_prod[16];
22 	char inquiry_rev[4];
23 	struct module *owner;
24 
25 	u8 transport_type;
26 
27 	int (*attach_hba)(struct se_hba *, u32);
28 	void (*detach_hba)(struct se_hba *);
29 	int (*pmode_enable_hba)(struct se_hba *, unsigned long);
30 
31 	struct se_device *(*alloc_device)(struct se_hba *, const char *);
32 	int (*configure_device)(struct se_device *);
33 	void (*free_device)(struct se_device *device);
34 
35 	ssize_t (*set_configfs_dev_params)(struct se_device *,
36 					   const char *, ssize_t);
37 	ssize_t (*show_configfs_dev_params)(struct se_device *, char *);
38 
39 	void (*transport_complete)(struct se_cmd *cmd,
40 				   struct scatterlist *,
41 				   unsigned char *);
42 
43 	sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
44 	u32 (*get_device_type)(struct se_device *);
45 	sector_t (*get_blocks)(struct se_device *);
46 	sector_t (*get_alignment_offset_lbas)(struct se_device *);
47 	/* lbppbe = logical blocks per physical block exponent. see SBC-3 */
48 	unsigned int (*get_lbppbe)(struct se_device *);
49 	unsigned int (*get_io_min)(struct se_device *);
50 	unsigned int (*get_io_opt)(struct se_device *);
51 	unsigned char *(*get_sense_buffer)(struct se_cmd *);
52 	bool (*get_write_cache)(struct se_device *);
53 	int (*init_prot)(struct se_device *);
54 	int (*format_prot)(struct se_device *);
55 	void (*free_prot)(struct se_device *);
56 
57 	struct target_backend_cits tb_cits;
58 };
59 
60 struct sbc_ops {
61 	sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *,
62 				     u32, enum dma_data_direction);
63 	sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
64 	sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
65 	sense_reason_t (*execute_write_same_unmap)(struct se_cmd *cmd);
66 	sense_reason_t (*execute_unmap)(struct se_cmd *cmd);
67 };
68 
69 int	transport_subsystem_register(struct se_subsystem_api *);
70 void	transport_subsystem_release(struct se_subsystem_api *);
71 
72 void	target_complete_cmd(struct se_cmd *, u8);
73 void	target_complete_cmd_with_length(struct se_cmd *, u8, int);
74 
75 sense_reason_t	spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
76 sense_reason_t	spc_emulate_report_luns(struct se_cmd *cmd);
77 sense_reason_t	spc_emulate_inquiry_std(struct se_cmd *, unsigned char *);
78 sense_reason_t	spc_emulate_evpd_83(struct se_cmd *, unsigned char *);
79 
80 sense_reason_t	sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
81 u32	sbc_get_device_rev(struct se_device *dev);
82 u32	sbc_get_device_type(struct se_device *dev);
83 sector_t	sbc_get_write_same_sectors(struct se_cmd *cmd);
84 sense_reason_t sbc_execute_unmap(struct se_cmd *cmd,
85 	sense_reason_t (*do_unmap_fn)(struct se_cmd *cmd, void *priv,
86 				      sector_t lba, sector_t nolb),
87 	void *priv);
88 void	sbc_dif_generate(struct se_cmd *);
89 sense_reason_t	sbc_dif_verify_write(struct se_cmd *, sector_t, unsigned int,
90 				     unsigned int, struct scatterlist *, int);
91 sense_reason_t	sbc_dif_verify_read(struct se_cmd *, sector_t, unsigned int,
92 				    unsigned int, struct scatterlist *, int);
93 sense_reason_t	sbc_dif_read_strip(struct se_cmd *);
94 
95 void	transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
96 int	transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
97 int	transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
98 int	transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
99 
100 /* core helpers also used by command snooping in pscsi */
101 void	*transport_kmap_data_sg(struct se_cmd *);
102 void	transport_kunmap_data_sg(struct se_cmd *);
103 /* core helpers also used by xcopy during internal command setup */
104 int	target_alloc_sgl(struct scatterlist **, unsigned int *, u32, bool);
105 sense_reason_t	transport_generic_map_mem_to_cmd(struct se_cmd *,
106 		struct scatterlist *, u32, struct scatterlist *, u32);
107 
108 void	array_free(void *array, int n);
109 
110 /* From target_core_configfs.c to setup default backend config_item_types */
111 void	target_core_setup_sub_cits(struct se_subsystem_api *);
112 
113 /* attribute helpers from target_core_device.c for backend drivers */
114 bool	se_dev_check_wce(struct se_device *);
115 int	se_dev_set_max_unmap_lba_count(struct se_device *, u32);
116 int	se_dev_set_max_unmap_block_desc_count(struct se_device *, u32);
117 int	se_dev_set_unmap_granularity(struct se_device *, u32);
118 int	se_dev_set_unmap_granularity_alignment(struct se_device *, u32);
119 int	se_dev_set_max_write_same_len(struct se_device *, u32);
120 int	se_dev_set_emulate_model_alias(struct se_device *, int);
121 int	se_dev_set_emulate_dpo(struct se_device *, int);
122 int	se_dev_set_emulate_fua_write(struct se_device *, int);
123 int	se_dev_set_emulate_fua_read(struct se_device *, int);
124 int	se_dev_set_emulate_write_cache(struct se_device *, int);
125 int	se_dev_set_emulate_ua_intlck_ctrl(struct se_device *, int);
126 int	se_dev_set_emulate_tas(struct se_device *, int);
127 int	se_dev_set_emulate_tpu(struct se_device *, int);
128 int	se_dev_set_emulate_tpws(struct se_device *, int);
129 int	se_dev_set_emulate_caw(struct se_device *, int);
130 int	se_dev_set_emulate_3pc(struct se_device *, int);
131 int	se_dev_set_pi_prot_type(struct se_device *, int);
132 int	se_dev_set_pi_prot_format(struct se_device *, int);
133 int	se_dev_set_enforce_pr_isids(struct se_device *, int);
134 int	se_dev_set_force_pr_aptpl(struct se_device *, int);
135 int	se_dev_set_is_nonrot(struct se_device *, int);
136 int	se_dev_set_emulate_rest_reord(struct se_device *dev, int);
137 int	se_dev_set_queue_depth(struct se_device *, u32);
138 int	se_dev_set_max_sectors(struct se_device *, u32);
139 int	se_dev_set_optimal_sectors(struct se_device *, u32);
140 int	se_dev_set_block_size(struct se_device *, u32);
141 
142 #endif /* TARGET_CORE_BACKEND_H */
143