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1 | #ifndef _SCSI_SCSI_EH_H |
2 | #define _SCSI_SCSI_EH_H |
3 | |
4 | #include <linux/scatterlist.h> |
5 | |
6 | #include <scsi/scsi_cmnd.h> |
7 | struct scsi_device; |
8 | struct 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 | */ |
19 | struct 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 | |
30 | static 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 | |
38 | |
39 | extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd, |
40 | struct list_head *done_q); |
41 | extern void scsi_eh_flush_done_q(struct list_head *done_q); |
42 | extern void scsi_report_bus_reset(struct Scsi_Host *, int); |
43 | extern void scsi_report_device_reset(struct Scsi_Host *, int, int); |
44 | extern int scsi_block_when_processing_errors(struct scsi_device *); |
45 | extern int scsi_normalize_sense(const u8 *sense_buffer, int sb_len, |
46 | struct scsi_sense_hdr *sshdr); |
47 | extern int scsi_command_normalize_sense(struct scsi_cmnd *cmd, |
48 | struct scsi_sense_hdr *sshdr); |
49 | |
50 | static inline int scsi_sense_is_deferred(struct scsi_sense_hdr *sshdr) |
51 | { |
52 | return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1)); |
53 | } |
54 | |
55 | extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len, |
56 | int desc_type); |
57 | |
58 | extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len, |
59 | u64 * info_out); |
60 | |
61 | extern void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq); |
62 | |
63 | /* |
64 | * Reset request from external source |
65 | */ |
66 | #define SCSI_TRY_RESET_DEVICE 1 |
67 | #define SCSI_TRY_RESET_BUS 2 |
68 | #define SCSI_TRY_RESET_HOST 3 |
69 | #define SCSI_TRY_RESET_TARGET 4 |
70 | |
71 | extern int scsi_reset_provider(struct scsi_device *, int); |
72 | |
73 | struct scsi_eh_save { |
74 | /* saved state */ |
75 | int result; |
76 | enum dma_data_direction data_direction; |
77 | unsigned underflow; |
78 | unsigned char cmd_len; |
79 | unsigned char prot_op; |
80 | unsigned char *cmnd; |
81 | struct scsi_data_buffer sdb; |
82 | struct request *next_rq; |
83 | /* new command support */ |
84 | unsigned char eh_cmnd[BLK_MAX_CDB]; |
85 | struct scatterlist sense_sgl; |
86 | }; |
87 | |
88 | extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, |
89 | struct scsi_eh_save *ses, unsigned char *cmnd, |
90 | int cmnd_size, unsigned sense_bytes); |
91 | |
92 | extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd, |
93 | struct scsi_eh_save *ses); |
94 | |
95 | #endif /* _SCSI_SCSI_EH_H */ |
96 |
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