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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
07e38420 BVA |
2 | /* |
3 | * Functions used by both the SCSI initiator code and the SCSI target code. | |
4 | */ | |
5 | ||
6 | #ifndef _SCSI_COMMON_H_ | |
7 | #define _SCSI_COMMON_H_ | |
8 | ||
9 | #include <linux/types.h> | |
10 | #include <scsi/scsi_proto.h> | |
11 | ||
12 | static inline unsigned | |
13 | scsi_varlen_cdb_length(const void *hdr) | |
14 | { | |
15 | return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8; | |
16 | } | |
17 | ||
18 | extern const unsigned char scsi_command_size_tbl[8]; | |
19 | #define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7] | |
20 | ||
21 | static inline unsigned | |
22 | scsi_command_size(const unsigned char *cmnd) | |
23 | { | |
24 | return (cmnd[0] == VARIABLE_LENGTH_CMD) ? | |
25 | scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]); | |
26 | } | |
27 | ||
28 | /* Returns a human-readable name for the device */ | |
29 | extern const char *scsi_device_type(unsigned type); | |
30 | ||
31 | extern void int_to_scsilun(u64, struct scsi_lun *); | |
32 | extern u64 scsilun_to_int(struct scsi_lun *); | |
33 | ||
34 | /* | |
35 | * This is a slightly modified SCSI sense "descriptor" format header. | |
36 | * The addition is to allow the 0x70 and 0x71 response codes. The idea | |
37 | * is to place the salient data from either "fixed" or "descriptor" sense | |
38 | * format into one structure to ease application processing. | |
39 | * | |
40 | * The original sense buffer should be kept around for those cases | |
41 | * in which more information is required (e.g. the LBA of a MEDIUM ERROR). | |
42 | */ | |
43 | struct scsi_sense_hdr { /* See SPC-3 section 4.5 */ | |
44 | u8 response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */ | |
45 | u8 sense_key; | |
46 | u8 asc; | |
47 | u8 ascq; | |
48 | u8 byte4; | |
49 | u8 byte5; | |
50 | u8 byte6; | |
51 | u8 additional_length; /* always 0 for fixed sense format */ | |
52 | }; | |
53 | ||
54 | static inline bool scsi_sense_valid(const struct scsi_sense_hdr *sshdr) | |
55 | { | |
56 | if (!sshdr) | |
57 | return false; | |
58 | ||
59 | return (sshdr->response_code & 0x70) == 0x70; | |
60 | } | |
61 | ||
62 | extern bool scsi_normalize_sense(const u8 *sense_buffer, int sb_len, | |
63 | struct scsi_sense_hdr *sshdr); | |
64 | ||
7708c165 | 65 | extern void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq); |
f5a8b3a7 | 66 | int scsi_set_sense_information(u8 *buf, int buf_len, u64 info); |
78db6e30 | 67 | int scsi_set_sense_field_pointer(u8 *buf, int buf_len, u16 fp, u8 bp, bool cd); |
7708c165 SG |
68 | extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len, |
69 | int desc_type); | |
70 | ||
07e38420 | 71 | #endif /* _SCSI_COMMON_H_ */ |