Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-4.9 / 95f6fb578970c9dbfcaa436ff98d2f3c6bdea953 / . / include / scsi / scsi_eh.h
blob: 25071d5d9bf813e95b49efa567fbed23c16f2236 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1#ifndef _SCSI_SCSI_EH_H
2#define _SCSI_SCSI_EH_H
3
James Bottomley645a0c62007-10-15 21:07:17 -0400[diff] [blame]4#include <linux/scatterlist.h>
5
Boaz Harroshe1c23462007-10-08 16:36:45 +0200[diff] [blame]6#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]7struct scsi_device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]8struct Scsi_Host;
9
10/*
11 * This is a slightly modified SCSI sense "descriptor" format header.
12 * The addition is to allow the 0x70 and 0x71 response codes. The idea
13 * is to place the salient data from either "fixed" or "descriptor" sense
14 * format into one structure to ease application processing.
15 *
16 * The original sense buffer should be kept around for those cases
17 * in which more information is required (e.g. the LBA of a MEDIUM ERROR).
18 */
19struct scsi_sense_hdr { /* See SPC-3 section 4.5 */
20 u8 response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */
21 u8 sense_key;
22 u8 asc;
23 u8 ascq;
24 u8 byte4;
25 u8 byte5;
26 u8 byte6;
27 u8 additional_length; /* always 0 for fixed sense format */
28};
29
James Bottomley33aa6872005-08-28 11:31:14 -0500[diff] [blame]30static inline int scsi_sense_valid(struct scsi_sense_hdr *sshdr)
31{
32 if (!sshdr)
33 return 0;
34
35 return (sshdr->response_code & 0x70) == 0x70;
36}
37
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]38
Tejun Heo041c5fc2006-01-23 13:09:36 +0900[diff] [blame]39extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
40 struct list_head *done_q);
41extern void scsi_eh_flush_done_q(struct list_head *done_q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]42extern void scsi_report_bus_reset(struct Scsi_Host *, int);
43extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
44extern int scsi_block_when_processing_errors(struct scsi_device *);
45extern int scsi_normalize_sense(const u8 *sense_buffer, int sb_len,
46 struct scsi_sense_hdr *sshdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]47extern int scsi_command_normalize_sense(struct scsi_cmnd *cmd,
48 struct scsi_sense_hdr *sshdr);
49
50static inline int scsi_sense_is_deferred(struct scsi_sense_hdr *sshdr)
51{
52 return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
53}
54
55extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len,
56 int desc_type);
57
58extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len,
59 u64 * info_out);
60
61/*
62 * Reset request from external source
63 */
64#define SCSI_TRY_RESET_DEVICE 1
65#define SCSI_TRY_RESET_BUS 2
66#define SCSI_TRY_RESET_HOST 3
67
68extern int scsi_reset_provider(struct scsi_device *, int);
69
Boaz Harroshe1c23462007-10-08 16:36:45 +0200[diff] [blame]70struct scsi_eh_save {
Boaz Harrosh30b0c372007-12-13 13:47:40 +0200[diff] [blame]71 /* saved state */
Boaz Harroshe1c23462007-10-08 16:36:45 +0200[diff] [blame]72 int result;
73 enum dma_data_direction data_direction;
74 unsigned char cmd_len;
75 unsigned char cmnd[MAX_COMMAND_SIZE];
Boaz Harrosh30b0c372007-12-13 13:47:40 +0200[diff] [blame]76 struct scsi_data_buffer sdb;
Boaz Harrosh6f9a35e2007-12-13 13:50:53 +0200[diff] [blame]77 struct request *next_rq;
Boaz Harroshe1c23462007-10-08 16:36:45 +0200[diff] [blame]78
Boaz Harrosh30b0c372007-12-13 13:47:40 +0200[diff] [blame]79 /* new command support */
Boaz Harroshe1c23462007-10-08 16:36:45 +0200[diff] [blame]80 struct scatterlist sense_sgl;
81};
82
83extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd,
84 struct scsi_eh_save *ses, unsigned char *cmnd,
85 int cmnd_size, unsigned sense_bytes);
86
87extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd,
88 struct scsi_eh_save *ses);
89
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]90#endif /* _SCSI_SCSI_EH_H */