projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 7010645b RB |
28 | static inline unsigned char |
| 29 | scsi_command_control(const unsigned char *cmnd) | |
| 30 | { | |
| 31 | return (cmnd[0] == VARIABLE_LENGTH_CMD) ? | |
| 32 | cmnd[1] : cmnd[COMMAND_SIZE(cmnd[0]) - 1]; | |
| 33 | } | |
| 34 | ||
| 07e38420 BVA |
35 | /* Returns a human-readable name for the device */ |
| 36 | extern const char *scsi_device_type(unsigned type); | |
| 37 | ||
| 38 | extern void int_to_scsilun(u64, struct scsi_lun *); | |
| 39 | extern u64 scsilun_to_int(struct scsi_lun *); | |
| 40 | ||
| 41 | /* | |
| 42 | * This is a slightly modified SCSI sense "descriptor" format header. | |
| 43 | * The addition is to allow the 0x70 and 0x71 response codes. The idea | |
| 44 | * is to place the salient data from either "fixed" or "descriptor" sense | |
| 45 | * format into one structure to ease application processing. | |
| 46 | * | |
| 47 | * The original sense buffer should be kept around for those cases | |
| 48 | * in which more information is required (e.g. the LBA of a MEDIUM ERROR). | |
| 49 | */ | |
| 50 | struct scsi_sense_hdr { /* See SPC-3 section 4.5 */ | |
| 51 | u8 response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */ | |
| 52 | u8 sense_key; | |
| 53 | u8 asc; | |
| 54 | u8 ascq; | |
| 55 | u8 byte4; | |
| 56 | u8 byte5; | |
| 57 | u8 byte6; | |
| 58 | u8 additional_length; /* always 0 for fixed sense format */ | |
| 59 | }; | |
| 60 | ||
| 61 | static inline bool scsi_sense_valid(const struct scsi_sense_hdr *sshdr) | |
| 62 | { | |
| 63 | if (!sshdr) | |
| 64 | return false; | |
| 65 | ||
| 66 | return (sshdr->response_code & 0x70) == 0x70; | |
| 67 | } | |
| 68 | ||
| 69 | extern bool scsi_normalize_sense(const u8 *sense_buffer, int sb_len, | |
| 70 | struct scsi_sense_hdr *sshdr); | |
| 71 | ||
| 7708c165 | 72 | extern void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq); |
| f5a8b3a7 | 73 | int scsi_set_sense_information(u8 *buf, int buf_len, u64 info); |
| 78db6e30 | 74 | int scsi_set_sense_field_pointer(u8 *buf, int buf_len, u16 fp, u8 bp, bool cd); |
| 7708c165 SG |
75 | extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len, |
| 76 | int desc_type); | |
| 77 | ||
| 07e38420 | 78 | #endif /* _SCSI_COMMON_H_ */ |