aboutsummaryrefslogtreecommitdiff
path: root/include/target/target_core_backend.h
blob: 80d9e486e33ede2472a5e77b8cf4aa66029beddc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
#ifndef TARGET_CORE_BACKEND_H
#define TARGET_CORE_BACKEND_H

#define TRANSPORT_FLAG_PASSTHROUGH		1

struct target_backend_cits {
	struct config_item_type tb_dev_cit;
	struct config_item_type tb_dev_attrib_cit;
	struct config_item_type tb_dev_pr_cit;
	struct config_item_type tb_dev_wwn_cit;
	struct config_item_type tb_dev_alua_tg_pt_gps_cit;
	struct config_item_type tb_dev_stat_cit;
};

struct se_subsystem_api {
	struct list_head sub_api_list;

	char name[16];
	char inquiry_prod[16];
	char inquiry_rev[4];
	struct module *owner;

	u8 transport_flags;

	int (*attach_hba)(struct se_hba *, u32);
	void (*detach_hba)(struct se_hba *);
	int (*pmode_enable_hba)(struct se_hba *, unsigned long);

	struct se_device *(*alloc_device)(struct se_hba *, const char *);
	int (*configure_device)(struct se_device *);
	void (*free_device)(struct se_device *device);

	ssize_t (*set_configfs_dev_params)(struct se_device *,
					   const char *, ssize_t);
	ssize_t (*show_configfs_dev_params)(struct se_device *, char *);

	void (*transport_complete)(struct se_cmd *cmd,
				   struct scatterlist *,
				   unsigned char *);

	sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
	u32 (*get_device_type)(struct se_device *);
	sector_t (*get_blocks)(struct se_device *);
	sector_t (*get_alignment_offset_lbas)(struct se_device *);
	/* lbppbe = logical blocks per physical block exponent. see SBC-3 */
	unsigned int (*get_lbppbe)(struct se_device *);
	unsigned int (*get_io_min)(struct se_device *);
	unsigned int (*get_io_opt)(struct se_device *);
	unsigned char *(*get_sense_buffer)(struct se_cmd *);
	bool (*get_write_cache)(struct se_device *);
	int (*init_prot)(struct se_device *);
	int (*format_prot)(struct se_device *);
	void (*free_prot)(struct se_device *);

	struct target_backend_cits tb_cits;
};

struct sbc_ops {
	sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *,
				     u32, enum dma_data_direction);
	sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
	sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
	sense_reason_t (*execute_write_same_unmap)(struct se_cmd *cmd);
	sense_reason_t (*execute_unmap)(struct se_cmd *cmd);
};

int	transport_subsystem_register(struct se_subsystem_api *);
void	transport_subsystem_release(struct se_subsystem_api *);

void	target_complete_cmd(struct se_cmd *, u8);
void	target_complete_cmd_with_length(struct se_cmd *, u8, int);

sense_reason_t	spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
sense_reason_t	spc_emulate_report_luns(struct se_cmd *cmd);
sense_reason_t	spc_emulate_inquiry_std(struct se_cmd *, unsigned char *);
sense_reason_t	spc_emulate_evpd_83(struct se_cmd *, unsigned char *);

sense_reason_t	sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
u32	sbc_get_device_rev(struct se_device *dev);
u32	sbc_get_device_type(struct se_device *dev);
sector_t	sbc_get_write_same_sectors(struct se_cmd *cmd);
sense_reason_t sbc_execute_unmap(struct se_cmd *cmd,
	sense_reason_t (*do_unmap_fn)(struct se_cmd *cmd, void *priv,
				      sector_t lba, sector_t nolb),
	void *priv);
void	sbc_dif_generate(struct se_cmd *);
sense_reason_t	sbc_dif_verify(struct se_cmd *, sector_t, unsigned int,
				     unsigned int, struct scatterlist *, int);
void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool,
		       struct scatterlist *, int);
void	transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
int	transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
int	transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
int	transport_set_vpd_ident(struct t10_vpd *, unsigned char *);

/* core helpers also used by command snooping in pscsi */
void	*transport_kmap_data_sg(struct se_cmd *);
void	transport_kunmap_data_sg(struct se_cmd *);
/* core helpers also used by xcopy during internal command setup */
int	target_alloc_sgl(struct scatterlist **, unsigned int *, u32, bool);
sense_reason_t	transport_generic_map_mem_to_cmd(struct se_cmd *,
		struct scatterlist *, u32, struct scatterlist *, u32);

bool	target_lun_is_rdonly(struct se_cmd *);

/* From target_core_configfs.c to setup default backend config_item_types */
void	target_core_setup_sub_cits(struct se_subsystem_api *);

/* attribute helpers from target_core_device.c for backend drivers */
bool	se_dev_check_wce(struct se_device *);
int	se_dev_set_max_unmap_lba_count(struct se_device *, u32);
int	se_dev_set_max_unmap_block_desc_count(struct se_device *, u32);
int	se_dev_set_unmap_granularity(struct se_device *, u32);
int	se_dev_set_unmap_granularity_alignment(struct se_device *, u32);
int	se_dev_set_max_write_same_len(struct se_device *, u32);
int	se_dev_set_emulate_model_alias(struct se_device *, int);
int	se_dev_set_emulate_dpo(struct se_device *, int);
int	se_dev_set_emulate_fua_write(struct se_device *, int);
int	se_dev_set_emulate_fua_read(struct se_device *, int);
int	se_dev_set_emulate_write_cache(struct se_device *, int);
int	se_dev_set_emulate_ua_intlck_ctrl(struct se_device *, int);
int	se_dev_set_emulate_tas(struct se_device *, int);
int	se_dev_set_emulate_tpu(struct se_device *, int);
int	se_dev_set_emulate_tpws(struct se_device *, int);
int	se_dev_set_emulate_caw(struct se_device *, int);
int	se_dev_set_emulate_3pc(struct se_device *, int);
int	se_dev_set_pi_prot_type(struct se_device *, int);
int	se_dev_set_pi_prot_format(struct se_device *, int);
int	se_dev_set_enforce_pr_isids(struct se_device *, int);
int	se_dev_set_force_pr_aptpl(struct se_device *, int);
int	se_dev_set_is_nonrot(struct se_device *, int);
int	se_dev_set_emulate_rest_reord(struct se_device *dev, int);
int	se_dev_set_queue_depth(struct se_device *, u32);
int	se_dev_set_max_sectors(struct se_device *, u32);
int	se_dev_set_optimal_sectors(struct se_device *, u32);
int	se_dev_set_block_size(struct se_device *, u32);
sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,
	sense_reason_t (*exec_cmd)(struct se_cmd *cmd));

#endif /* TARGET_CORE_BACKEND_H */