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 static 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 38 extern void scsi_report_bus_reset(struct Scsi_Host *, int); 39 extern void scsi_report_device_reset(struct Scsi_Host *, int, int); 40 extern int scsi_block_when_processing_errors(struct scsi_device *); 41 extern int scsi_normalize_sense(const u8 *sense_buffer, int sb_len, 42 struct scsi_sense_hdr *sshdr); 43 extern int scsi_request_normalize_sense(struct scsi_request *sreq, 44 struct scsi_sense_hdr *sshdr); 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 68 #endif /* _SCSI_SCSI_EH_H */ 69