| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Functions used by both the SCSI initiator code and the SCSI target code. |
| */ |
| |
| #ifndef _SCSI_COMMON_H_ |
| #define _SCSI_COMMON_H_ |
| |
| #include <linux/types.h> |
| #include <scsi/scsi_proto.h> |
| |
| static inline unsigned |
| scsi_varlen_cdb_length(const void *hdr) |
| { |
| return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8; |
| } |
| |
| extern const unsigned char scsi_command_size_tbl[8]; |
| #define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7] |
| |
| static inline unsigned |
| scsi_command_size(const unsigned char *cmnd) |
| { |
| return (cmnd[0] == VARIABLE_LENGTH_CMD) ? |
| scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]); |
| } |
| |
| /* Returns a human-readable name for the device */ |
| extern const char *scsi_device_type(unsigned type); |
| |
| extern void int_to_scsilun(u64, struct scsi_lun *); |
| extern u64 scsilun_to_int(struct scsi_lun *); |
| |
| /* |
| * This is a slightly modified SCSI sense "descriptor" format header. |
| * The addition is to allow the 0x70 and 0x71 response codes. The idea |
| * is to place the salient data from either "fixed" or "descriptor" sense |
| * format into one structure to ease application processing. |
| * |
| * The original sense buffer should be kept around for those cases |
| * in which more information is required (e.g. the LBA of a MEDIUM ERROR). |
| */ |
| struct scsi_sense_hdr { /* See SPC-3 section 4.5 */ |
| u8 response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */ |
| u8 sense_key; |
| u8 asc; |
| u8 ascq; |
| u8 byte4; |
| u8 byte5; |
| u8 byte6; |
| u8 additional_length; /* always 0 for fixed sense format */ |
| }; |
| |
| static inline bool scsi_sense_valid(const struct scsi_sense_hdr *sshdr) |
| { |
| if (!sshdr) |
| return false; |
| |
| return (sshdr->response_code & 0x70) == 0x70; |
| } |
| |
| extern bool scsi_normalize_sense(const u8 *sense_buffer, int sb_len, |
| struct scsi_sense_hdr *sshdr); |
| |
| extern void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq); |
| int scsi_set_sense_information(u8 *buf, int buf_len, u64 info); |
| int scsi_set_sense_field_pointer(u8 *buf, int buf_len, u16 fp, u8 bp, bool cd); |
| extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len, |
| int desc_type); |
| |
| #endif /* _SCSI_COMMON_H_ */ |