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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
c4795fb2 CH |
2 | #ifndef TARGET_CORE_BACKEND_H |
3 | #define TARGET_CORE_BACKEND_H | |
4 | ||
8dcf07be | 5 | #include <linux/types.h> |
a85d667e | 6 | #include <asm/unaligned.h> |
8dcf07be BVA |
7 | #include <target/target_core_base.h> |
8 | ||
530c6891 MC |
9 | #define TRANSPORT_FLAG_PASSTHROUGH 0x1 |
10 | /* | |
11 | * ALUA commands, state checks and setup operations are handled by the | |
12 | * backend module. | |
13 | */ | |
14 | #define TRANSPORT_FLAG_PASSTHROUGH_ALUA 0x2 | |
4ec5bf0e | 15 | #define TRANSPORT_FLAG_PASSTHROUGH_PGR 0x4 |
c4795fb2 | 16 | |
8dcf07be BVA |
17 | struct request_queue; |
18 | struct scatterlist; | |
19 | ||
0a06d430 | 20 | struct target_backend_ops { |
c4795fb2 | 21 | char name[16]; |
0fd97ccf CH |
22 | char inquiry_prod[16]; |
23 | char inquiry_rev[4]; | |
c4795fb2 CH |
24 | struct module *owner; |
25 | ||
a3541703 | 26 | u8 transport_flags; |
c4795fb2 | 27 | |
c4795fb2 CH |
28 | int (*attach_hba)(struct se_hba *, u32); |
29 | void (*detach_hba)(struct se_hba *); | |
30 | int (*pmode_enable_hba)(struct se_hba *, unsigned long); | |
0fd97ccf CH |
31 | |
32 | struct se_device *(*alloc_device)(struct se_hba *, const char *); | |
33 | int (*configure_device)(struct se_device *); | |
92634706 | 34 | void (*destroy_device)(struct se_device *); |
0fd97ccf CH |
35 | void (*free_device)(struct se_device *device); |
36 | ||
37 | ssize_t (*set_configfs_dev_params)(struct se_device *, | |
38 | const char *, ssize_t); | |
39 | ssize_t (*show_configfs_dev_params)(struct se_device *, char *); | |
40 | ||
de103c93 | 41 | sense_reason_t (*parse_cdb)(struct se_cmd *cmd); |
c4795fb2 CH |
42 | u32 (*get_device_type)(struct se_device *); |
43 | sector_t (*get_blocks)(struct se_device *); | |
7f7caf6a AG |
44 | sector_t (*get_alignment_offset_lbas)(struct se_device *); |
45 | /* lbppbe = logical blocks per physical block exponent. see SBC-3 */ | |
46 | unsigned int (*get_lbppbe)(struct se_device *); | |
47 | unsigned int (*get_io_min)(struct se_device *); | |
48 | unsigned int (*get_io_opt)(struct se_device *); | |
5787cacd | 49 | unsigned char *(*get_sense_buffer)(struct se_cmd *); |
d0c8b259 | 50 | bool (*get_write_cache)(struct se_device *); |
ce65e5b9 NB |
51 | int (*init_prot)(struct se_device *); |
52 | int (*format_prot)(struct se_device *); | |
53 | void (*free_prot)(struct se_device *); | |
73112edc | 54 | |
0a06d430 | 55 | struct configfs_attribute **tb_dev_attrib_attrs; |
c4795fb2 CH |
56 | }; |
57 | ||
9e999a6c | 58 | struct sbc_ops { |
a82a9538 NB |
59 | sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *, |
60 | u32, enum dma_data_direction); | |
de103c93 CH |
61 | sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd); |
62 | sense_reason_t (*execute_write_same)(struct se_cmd *cmd); | |
62e46942 CH |
63 | sense_reason_t (*execute_unmap)(struct se_cmd *cmd, |
64 | sector_t lba, sector_t nolb); | |
0c2ad7d1 CH |
65 | }; |
66 | ||
0a06d430 CH |
67 | int transport_backend_register(const struct target_backend_ops *); |
68 | void target_backend_unregister(const struct target_backend_ops *); | |
c4795fb2 | 69 | |
6bb35e00 | 70 | void target_complete_cmd(struct se_cmd *, u8); |
2426bd45 | 71 | void target_complete_cmd_with_length(struct se_cmd *, u8, int); |
c4795fb2 | 72 | |
c6d66aba MC |
73 | void transport_copy_sense_to_cmd(struct se_cmd *, unsigned char *); |
74 | ||
de103c93 CH |
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); | |
0dfa1c5d HR |
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 *); | |
d6e0175c | 79 | |
de103c93 | 80 | sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops); |
6f23ac8a CH |
81 | u32 sbc_get_device_rev(struct se_device *dev); |
82 | u32 sbc_get_device_type(struct se_device *dev); | |
972b29c8 | 83 | sector_t sbc_get_write_same_sectors(struct se_cmd *cmd); |
66a3d5bc | 84 | void sbc_dif_generate(struct se_cmd *); |
f75b6fae | 85 | sense_reason_t sbc_dif_verify(struct se_cmd *, sector_t, unsigned int, |
41861fa8 | 86 | unsigned int, struct scatterlist *, int); |
f75b6fae SG |
87 | void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool, |
88 | struct scatterlist *, int); | |
c4795fb2 CH |
89 | void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *); |
90 | int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *); | |
91 | int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *); | |
92 | int transport_set_vpd_ident(struct t10_vpd *, unsigned char *); | |
93 | ||
5873c4d1 CH |
94 | extern struct configfs_attribute *sbc_attrib_attrs[]; |
95 | extern struct configfs_attribute *passthrough_attrib_attrs[]; | |
96 | ||
c4795fb2 | 97 | /* core helpers also used by command snooping in pscsi */ |
4949314c AG |
98 | void *transport_kmap_data_sg(struct se_cmd *); |
99 | void transport_kunmap_data_sg(struct se_cmd *); | |
c5ff8d6b | 100 | /* core helpers also used by xcopy during internal command setup */ |
c5ff8d6b NB |
101 | sense_reason_t transport_generic_map_mem_to_cmd(struct se_cmd *, |
102 | struct scatterlist *, u32, struct scatterlist *, u32); | |
c4795fb2 | 103 | |
29a05dee | 104 | bool target_lun_is_rdonly(struct se_cmd *); |
7bfea53b AG |
105 | sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd, |
106 | sense_reason_t (*exec_cmd)(struct se_cmd *cmd)); | |
d30cd123 | 107 | |
85441e6b MC |
108 | struct se_device *target_find_device(int id, bool do_depend); |
109 | ||
4e4937e8 | 110 | bool target_sense_desc_format(struct se_device *dev); |
8a9ebe71 MC |
111 | sector_t target_to_linux_sector(struct se_device *dev, sector_t lb); |
112 | bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib, | |
ea263c7f | 113 | struct request_queue *q); |
4e4937e8 | 114 | |
a85d667e BVA |
115 | |
116 | /* Only use get_unaligned_be24() if reading p - 1 is allowed. */ | |
117 | static inline uint32_t get_unaligned_be24(const uint8_t *const p) | |
118 | { | |
119 | return get_unaligned_be32(p - 1) & 0xffffffU; | |
120 | } | |
121 | ||
c4795fb2 | 122 | #endif /* TARGET_CORE_BACKEND_H */ |