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1da177e4 LT |
1 | #ifndef _SCSI_SCSI_EH_H |
2 | #define _SCSI_SCSI_EH_H | |
3 | ||
e1c23468 | 4 | #include <scsi/scsi_cmnd.h> |
1da177e4 | 5 | struct scsi_device; |
1da177e4 LT |
6 | struct Scsi_Host; |
7 | ||
8 | /* | |
9 | * This is a slightly modified SCSI sense "descriptor" format header. | |
10 | * The addition is to allow the 0x70 and 0x71 response codes. The idea | |
11 | * is to place the salient data from either "fixed" or "descriptor" sense | |
12 | * format into one structure to ease application processing. | |
13 | * | |
14 | * The original sense buffer should be kept around for those cases | |
15 | * in which more information is required (e.g. the LBA of a MEDIUM ERROR). | |
16 | */ | |
17 | struct scsi_sense_hdr { /* See SPC-3 section 4.5 */ | |
18 | u8 response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */ | |
19 | u8 sense_key; | |
20 | u8 asc; | |
21 | u8 ascq; | |
22 | u8 byte4; | |
23 | u8 byte5; | |
24 | u8 byte6; | |
25 | u8 additional_length; /* always 0 for fixed sense format */ | |
26 | }; | |
27 | ||
33aa687d JB |
28 | static inline int scsi_sense_valid(struct scsi_sense_hdr *sshdr) |
29 | { | |
30 | if (!sshdr) | |
31 | return 0; | |
32 | ||
33 | return (sshdr->response_code & 0x70) == 0x70; | |
34 | } | |
35 | ||
1da177e4 | 36 | |
041c5fc3 TH |
37 | extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd, |
38 | struct list_head *done_q); | |
39 | extern void scsi_eh_flush_done_q(struct list_head *done_q); | |
1da177e4 LT |
40 | extern void scsi_report_bus_reset(struct Scsi_Host *, int); |
41 | extern void scsi_report_device_reset(struct Scsi_Host *, int, int); | |
42 | extern int scsi_block_when_processing_errors(struct scsi_device *); | |
43 | extern int scsi_normalize_sense(const u8 *sense_buffer, int sb_len, | |
44 | struct scsi_sense_hdr *sshdr); | |
1da177e4 LT |
45 | extern int scsi_command_normalize_sense(struct scsi_cmnd *cmd, |
46 | struct scsi_sense_hdr *sshdr); | |
47 | ||
48 | static inline int scsi_sense_is_deferred(struct scsi_sense_hdr *sshdr) | |
49 | { | |
50 | return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1)); | |
51 | } | |
52 | ||
53 | extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len, | |
54 | int desc_type); | |
55 | ||
56 | extern 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 | ||
66 | extern int scsi_reset_provider(struct scsi_device *, int); | |
67 | ||
e1c23468 BH |
68 | struct scsi_eh_save { |
69 | int result; | |
70 | enum dma_data_direction data_direction; | |
71 | unsigned char cmd_len; | |
72 | unsigned char cmnd[MAX_COMMAND_SIZE]; | |
73 | ||
74 | void *buffer; | |
75 | unsigned bufflen; | |
76 | unsigned short use_sg; | |
77 | int resid; | |
78 | ||
79 | struct scatterlist sense_sgl; | |
80 | }; | |
81 | ||
82 | extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, | |
83 | struct scsi_eh_save *ses, unsigned char *cmnd, | |
84 | int cmnd_size, unsigned sense_bytes); | |
85 | ||
86 | extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd, | |
87 | struct scsi_eh_save *ses); | |
88 | ||
1da177e4 | 89 | #endif /* _SCSI_SCSI_EH_H */ |