tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _SCSI_SCSI_EH_H
2#define _SCSI_SCSI_EH_H
3
4struct scsi_cmnd;
5struct scsi_device;
6struct scsi_request;
7struct Scsi_Host;
8
9/*
10 * This is a slightly modified SCSI sense "descriptor" format header.
11 * The addition is to allow the 0x70 and 0x71 response codes. The idea
12 * is to place the salient data from either "fixed" or "descriptor" sense
13 * format into one structure to ease application processing.
14 *
15 * The original sense buffer should be kept around for those cases
16 * in which more information is required (e.g. the LBA of a MEDIUM ERROR).
17 */
18struct scsi_sense_hdr { /* See SPC-3 section 4.5 */
19 u8 response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */
20 u8 sense_key;
21 u8 asc;
22 u8 ascq;
23 u8 byte4;
24 u8 byte5;
25 u8 byte6;
26 u8 additional_length; /* always 0 for fixed sense format */
27};
28
29static inline int scsi_sense_valid(struct scsi_sense_hdr *sshdr)
30{
31 if (!sshdr)
32 return 0;
33
34 return (sshdr->response_code & 0x70) == 0x70;
35}
36
37
38extern void scsi_report_bus_reset(struct Scsi_Host *, int);
39extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
40extern int scsi_block_when_processing_errors(struct scsi_device *);
41extern int scsi_normalize_sense(const u8 *sense_buffer, int sb_len,
42 struct scsi_sense_hdr *sshdr);
43extern int scsi_request_normalize_sense(struct scsi_request *sreq,
44 struct scsi_sense_hdr *sshdr);
45extern int scsi_command_normalize_sense(struct scsi_cmnd *cmd,
46 struct scsi_sense_hdr *sshdr);
47
48static inline int scsi_sense_is_deferred(struct scsi_sense_hdr *sshdr)
49{
50 return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
51}
52
53extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len,
54 int desc_type);
55
56extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len,
57 u64 * info_out);
58
59/*
60 * Reset request from external source
61 */
62#define SCSI_TRY_RESET_DEVICE 1
63#define SCSI_TRY_RESET_BUS 2
64#define SCSI_TRY_RESET_HOST 3
65
66extern int scsi_reset_provider(struct scsi_device *, int);
67
68#endif /* _SCSI_SCSI_EH_H */