tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
8struct 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
17struct 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
60struct 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
69int transport_subsystem_register(struct se_subsystem_api *);
70void transport_subsystem_release(struct se_subsystem_api *);
71
72void target_complete_cmd(struct se_cmd *, u8);
73void target_complete_cmd_with_length(struct se_cmd *, u8, int);
74
75sense_reason_t spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
76sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd);
77sense_reason_t spc_emulate_inquiry_std(struct se_cmd *, unsigned char *);
78sense_reason_t spc_emulate_evpd_83(struct se_cmd *, unsigned char *);
79
80sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
81u32 sbc_get_device_rev(struct se_device *dev);
82u32 sbc_get_device_type(struct se_device *dev);
83sector_t sbc_get_write_same_sectors(struct se_cmd *cmd);
84sense_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);
88void sbc_dif_generate(struct se_cmd *);
89sense_reason_t sbc_dif_verify_write(struct se_cmd *, sector_t, unsigned int,
90 unsigned int, struct scatterlist *, int);
91sense_reason_t sbc_dif_verify_read(struct se_cmd *, sector_t, unsigned int,
92 unsigned int, struct scatterlist *, int);
93sense_reason_t sbc_dif_read_strip(struct se_cmd *);
94
95void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
96int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
97int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
98int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
99
100/* core helpers also used by command snooping in pscsi */
101void *transport_kmap_data_sg(struct se_cmd *);
102void transport_kunmap_data_sg(struct se_cmd *);
103/* core helpers also used by xcopy during internal command setup */
104int target_alloc_sgl(struct scatterlist **, unsigned int *, u32, bool);
105sense_reason_t transport_generic_map_mem_to_cmd(struct se_cmd *,
106 struct scatterlist *, u32, struct scatterlist *, u32);
107
108void array_free(void *array, int n);
109
110/* From target_core_configfs.c to setup default backend config_item_types */
111void target_core_setup_sub_cits(struct se_subsystem_api *);
112
113/* attribute helpers from target_core_device.c for backend drivers */
114int se_dev_set_max_unmap_lba_count(struct se_device *, u32);
115int se_dev_set_max_unmap_block_desc_count(struct se_device *, u32);
116int se_dev_set_unmap_granularity(struct se_device *, u32);
117int se_dev_set_unmap_granularity_alignment(struct se_device *, u32);
118int se_dev_set_max_write_same_len(struct se_device *, u32);
119int se_dev_set_emulate_model_alias(struct se_device *, int);
120int se_dev_set_emulate_dpo(struct se_device *, int);
121int se_dev_set_emulate_fua_write(struct se_device *, int);
122int se_dev_set_emulate_fua_read(struct se_device *, int);
123int se_dev_set_emulate_write_cache(struct se_device *, int);
124int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *, int);
125int se_dev_set_emulate_tas(struct se_device *, int);
126int se_dev_set_emulate_tpu(struct se_device *, int);
127int se_dev_set_emulate_tpws(struct se_device *, int);
128int se_dev_set_emulate_caw(struct se_device *, int);
129int se_dev_set_emulate_3pc(struct se_device *, int);
130int se_dev_set_pi_prot_type(struct se_device *, int);
131int se_dev_set_pi_prot_format(struct se_device *, int);
132int se_dev_set_enforce_pr_isids(struct se_device *, int);
133int se_dev_set_force_pr_aptpl(struct se_device *, int);
134int se_dev_set_is_nonrot(struct se_device *, int);
135int se_dev_set_emulate_rest_reord(struct se_device *dev, int);
136int se_dev_set_queue_depth(struct se_device *, u32);
137int se_dev_set_max_sectors(struct se_device *, u32);
138int se_dev_set_optimal_sectors(struct se_device *, u32);
139int se_dev_set_block_size(struct se_device *, u32);
140
141#endif /* TARGET_CORE_BACKEND_H */