1 #ifndef _SCSI_SCSI_EH_H
2 #define _SCSI_SCSI_EH_H
3
4 struct scsi_cmnd;
5 struct scsi_device;
6 struct scsi_request;
7 struct 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 */
18 struct 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
29
30 extern void scsi_add_timer(struct scsi_cmnd *, int,
31 void (*)(struct scsi_cmnd *));
32 extern int scsi_delete_timer(struct scsi_cmnd *);
33 extern void scsi_report_bus_reset(struct Scsi_Host *, int);
34 extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
35 extern int scsi_block_when_processing_errors(struct scsi_device *);
36 extern int scsi_normalize_sense(const u8 *sense_buffer, int sb_len,
37 struct scsi_sense_hdr *sshdr);
38 extern int scsi_request_normalize_sense(struct scsi_request *sreq,
39 struct scsi_sense_hdr *sshdr);
40 extern int scsi_command_normalize_sense(struct scsi_cmnd *cmd,
41 struct scsi_sense_hdr *sshdr);
42
43 static inline int scsi_sense_is_deferred(struct scsi_sense_hdr *sshdr)
44 {
45 return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
46 }
47
48 extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len,
49 int desc_type);
50
51 extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len,
52 u64 * info_out);
53
54 /*
55 * Reset request from external source
56 */
57 #define SCSI_TRY_RESET_DEVICE 1
58 #define SCSI_TRY_RESET_BUS 2
59 #define SCSI_TRY_RESET_HOST 3
60
61 extern int scsi_reset_provider(struct scsi_device *, int);
62
63 #endif /* _SCSI_SCSI_EH_H */
64
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