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 /* 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 68 extern int scsi_reset_provider(struct scsi_device *, int); 69 70 struct scsi_eh_save { 71 /* saved state */ 72 int result; 73 enum dma_data_direction data_direction; 74 unsigned char cmd_len; 75 unsigned char cmnd[MAX_COMMAND_SIZE]; 76 struct scsi_data_buffer sdb; 77 struct request *next_rq; 78 79 /* new command support */ 80 struct scatterlist sense_sgl; 81 }; 82 83 extern 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 87 extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd, 88 struct scsi_eh_save *ses); 89 90 #endif /* _SCSI_SCSI_EH_H */ 91