79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
|
/* 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]);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline unsigned char
|
||
|
|
scsi_command_control(const unsigned char *cmnd)
|
||
|
|
{
|
||
|
|
return (cmnd[0] == VARIABLE_LENGTH_CMD) ?
|
||
|
|
cmnd[1] : cmnd[COMMAND_SIZE(cmnd[0]) - 1];
|
||
|
|
}
|
||
|
|
|
||
|
|
/* 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_ */
|