diff options
Diffstat (limited to 'include/scsi/scsi_cmnd.h')
| -rw-r--r-- | include/scsi/scsi_cmnd.h | 80 |
1 files changed, 69 insertions, 11 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index fed024f4c02a..31078063afac 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -111,9 +111,6 @@ struct scsi_cmnd { reconnects. Probably == sector size */ - struct request *request; /* The command we are - working on */ - unsigned char *sense_buffer; /* obtained by REQUEST SENSE when * CHECK CONDITION is received on original @@ -142,10 +139,15 @@ struct scsi_cmnd { int flags; /* Command flags */ unsigned long state; /* Command completion state */ - unsigned char tag; /* SCSI-II queued command tag */ unsigned int extra_len; /* length of alignment and padding */ }; +/* Variant of blk_mq_rq_from_pdu() that verifies the type of its argument. */ +static inline struct request *scsi_cmd_to_rq(struct scsi_cmnd *scmd) +{ + return blk_mq_rq_from_pdu(scmd); +} + /* * Return the driver private allocation behind the command. * Only works if cmd_size is set in the host template. @@ -158,7 +160,9 @@ static inline void *scsi_cmd_priv(struct scsi_cmnd *cmd) /* make sure not to use it with passthrough commands */ static inline struct scsi_driver *scsi_cmd_to_driver(struct scsi_cmnd *cmd) { - return *(struct scsi_driver **)cmd->request->rq_disk->private_data; + struct request *rq = scsi_cmd_to_rq(cmd); + + return *(struct scsi_driver **)rq->rq_disk->private_data; } extern void scsi_finish_command(struct scsi_cmnd *cmd); @@ -220,6 +224,25 @@ static inline int scsi_sg_copy_to_buffer(struct scsi_cmnd *cmd, buf, buflen); } +static inline sector_t scsi_get_sector(struct scsi_cmnd *scmd) +{ + return blk_rq_pos(scsi_cmd_to_rq(scmd)); +} + +static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd) +{ + unsigned int shift = ilog2(scmd->device->sector_size) - SECTOR_SHIFT; + + return blk_rq_pos(scsi_cmd_to_rq(scmd)) >> shift; +} + +static inline unsigned int scsi_logical_block_count(struct scsi_cmnd *scmd) +{ + unsigned int shift = ilog2(scmd->device->sector_size) - SECTOR_SHIFT; + + return blk_rq_bytes(scsi_cmd_to_rq(scmd)) >> shift; +} + /* * The operations below are hints that tell the controller driver how * to handle I/Os with DIF or similar types of protection information. @@ -282,9 +305,11 @@ static inline unsigned char scsi_get_prot_type(struct scsi_cmnd *scmd) return scmd->prot_type; } -static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd) +static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd) { - return blk_rq_pos(scmd->request); + struct request *rq = blk_mq_rq_from_pdu(scmd); + + return t10_pi_ref_tag(rq); } static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd) @@ -315,9 +340,9 @@ static inline void set_status_byte(struct scsi_cmnd *cmd, char status) cmd->result = (cmd->result & 0xffffff00) | status; } -static inline void set_msg_byte(struct scsi_cmnd *cmd, char status) +static inline u8 get_status_byte(struct scsi_cmnd *cmd) { - cmd->result = (cmd->result & 0xffff00ff) | (status << 8); + return cmd->result & 0xff; } static inline void set_host_byte(struct scsi_cmnd *cmd, char status) @@ -325,9 +350,36 @@ static inline void set_host_byte(struct scsi_cmnd *cmd, char status) cmd->result = (cmd->result & 0xff00ffff) | (status << 16); } -static inline void set_driver_byte(struct scsi_cmnd *cmd, char status) +static inline u8 get_host_byte(struct scsi_cmnd *cmd) { - cmd->result = (cmd->result & 0x00ffffff) | (status << 24); + return (cmd->result >> 16) & 0xff; +} + +/** + * scsi_msg_to_host_byte() - translate message byte + * + * Translate the SCSI parallel message byte to a matching + * host byte setting. A message of COMMAND_COMPLETE indicates + * a successful command execution, any other message indicate + * an error. As the messages themselves only have a meaning + * for the SCSI parallel protocol this function translates + * them into a matching host byte value for SCSI EH. + */ +static inline void scsi_msg_to_host_byte(struct scsi_cmnd *cmd, u8 msg) +{ + switch (msg) { + case COMMAND_COMPLETE: + break; + case ABORT_TASK_SET: + set_host_byte(cmd, DID_ABORT); + break; + case TARGET_RESET: + set_host_byte(cmd, DID_RESET); + break; + default: + set_host_byte(cmd, DID_ERROR); + break; + } } static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd) @@ -341,4 +393,10 @@ static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd) return xfer_len; } +extern void scsi_build_sense(struct scsi_cmnd *scmd, int desc, + u8 key, u8 asc, u8 ascq); + +struct request *scsi_alloc_request(struct request_queue *q, + unsigned int op, blk_mq_req_flags_t flags); + #endif /* _SCSI_SCSI_CMND_H */ |