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_FLAG_PASSTHROUGH 1
5
6struct target_backend_ops {
7 char name[16];
8 char inquiry_prod[16];
9 char inquiry_rev[4];
10 struct module *owner;
11
12 u8 transport_flags;
13
14 int (*attach_hba)(struct se_hba *, u32);
15 void (*detach_hba)(struct se_hba *);
16 int (*pmode_enable_hba)(struct se_hba *, unsigned long);
17
18 struct se_device *(*alloc_device)(struct se_hba *, const char *);
19 int (*configure_device)(struct se_device *);
20 void (*free_device)(struct se_device *device);
21
22 ssize_t (*set_configfs_dev_params)(struct se_device *,
23 const char *, ssize_t);
24 ssize_t (*show_configfs_dev_params)(struct se_device *, char *);
25
26 void (*transport_complete)(struct se_cmd *cmd,
27 struct scatterlist *,
28 unsigned char *);
29
30 sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
31 u32 (*get_device_type)(struct se_device *);
32 sector_t (*get_blocks)(struct se_device *);
33 sector_t (*get_alignment_offset_lbas)(struct se_device *);
34 /* lbppbe = logical blocks per physical block exponent. see SBC-3 */
35 unsigned int (*get_lbppbe)(struct se_device *);
36 unsigned int (*get_io_min)(struct se_device *);
37 unsigned int (*get_io_opt)(struct se_device *);
38 unsigned char *(*get_sense_buffer)(struct se_cmd *);
39 bool (*get_write_cache)(struct se_device *);
40 int (*init_prot)(struct se_device *);
41 int (*format_prot)(struct se_device *);
42 void (*free_prot)(struct se_device *);
43
44 struct configfs_attribute **tb_dev_attrib_attrs;
45};
46
47struct sbc_ops {
48 sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *,
49 u32, enum dma_data_direction);
50 sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
51 sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
52 sense_reason_t (*execute_unmap)(struct se_cmd *cmd,
53 sector_t lba, sector_t nolb);
54};
55
56int transport_backend_register(const struct target_backend_ops *);
57void target_backend_unregister(const struct target_backend_ops *);
58
59void target_complete_cmd(struct se_cmd *, u8);
60void target_complete_cmd_with_length(struct se_cmd *, u8, int);
61
62sense_reason_t spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
63sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd);
64sense_reason_t spc_emulate_inquiry_std(struct se_cmd *, unsigned char *);
65sense_reason_t spc_emulate_evpd_83(struct se_cmd *, unsigned char *);
66
67sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
68u32 sbc_get_device_rev(struct se_device *dev);
69u32 sbc_get_device_type(struct se_device *dev);
70sector_t sbc_get_write_same_sectors(struct se_cmd *cmd);
71void sbc_dif_generate(struct se_cmd *);
72sense_reason_t sbc_dif_verify(struct se_cmd *, sector_t, unsigned int,
73 unsigned int, struct scatterlist *, int);
74void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool,
75 struct scatterlist *, int);
76void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
77int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
78int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
79int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
80
81extern struct configfs_attribute *sbc_attrib_attrs[];
82extern struct configfs_attribute *passthrough_attrib_attrs[];
83
84/* core helpers also used by command snooping in pscsi */
85void *transport_kmap_data_sg(struct se_cmd *);
86void transport_kunmap_data_sg(struct se_cmd *);
87/* core helpers also used by xcopy during internal command setup */
88sense_reason_t transport_generic_map_mem_to_cmd(struct se_cmd *,
89 struct scatterlist *, u32, struct scatterlist *, u32);
90
91bool target_lun_is_rdonly(struct se_cmd *);
92sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,
93 sense_reason_t (*exec_cmd)(struct se_cmd *cmd));
94
95bool target_sense_desc_format(struct se_device *dev);
96sector_t target_to_linux_sector(struct se_device *dev, sector_t lb);
97bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
98 struct request_queue *q, int block_size);
99
100#endif /* TARGET_CORE_BACKEND_H */