diff options
Diffstat (limited to 'include/scsi/scsi_cmnd.h')
| -rw-r--r-- | include/scsi/scsi_cmnd.h | 36 |
1 files changed, 26 insertions, 10 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 73f349044941..522a5f27f553 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -10,9 +10,10 @@ #include <scsi/scsi_device.h> struct Scsi_Host; -struct scsi_device; struct scsi_driver; +#include <scsi/scsi_device.h> + /* * MAX_COMMAND_SIZE is: * The longest fixed-length SCSI CDB as per the SCSI standard. @@ -81,6 +82,7 @@ struct scsi_cmnd { unsigned char prot_op; unsigned char prot_type; + unsigned char prot_flags; unsigned short cmd_len; enum dma_data_direction sc_data_direction; @@ -252,6 +254,14 @@ static inline unsigned char scsi_get_prot_op(struct scsi_cmnd *scmd) return scmd->prot_op; } +enum scsi_prot_flags { + SCSI_PROT_TRANSFER_PI = 1 << 0, + SCSI_PROT_GUARD_CHECK = 1 << 1, + SCSI_PROT_REF_CHECK = 1 << 2, + SCSI_PROT_REF_INCREMENT = 1 << 3, + SCSI_PROT_IP_CHECKSUM = 1 << 4, +}; + /* * The controller usually does not know anything about the target it * is communicating with. However, when DIX is enabled the controller @@ -280,6 +290,17 @@ static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd) return blk_rq_pos(scmd->request); } +static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd) +{ + return scmd->device->sector_size; +} + +static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd) +{ + return blk_rq_pos(scmd->request) >> + (ilog2(scsi_prot_interval(scmd)) - 9) & 0xffffffff; +} + static inline unsigned scsi_prot_sg_count(struct scsi_cmnd *cmd) { return cmd->prot_sdb ? cmd->prot_sdb->table.nents : 0; @@ -316,17 +337,12 @@ static inline void set_driver_byte(struct scsi_cmnd *cmd, char status) static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd) { unsigned int xfer_len = scsi_out(scmd)->length; - unsigned int prot_op = scsi_get_prot_op(scmd); - unsigned int sector_size = scmd->device->sector_size; + unsigned int prot_interval = scsi_prot_interval(scmd); - switch (prot_op) { - case SCSI_PROT_NORMAL: - case SCSI_PROT_WRITE_STRIP: - case SCSI_PROT_READ_INSERT: - return xfer_len; - } + if (scmd->prot_flags & SCSI_PROT_TRANSFER_PI) + xfer_len += (xfer_len >> ilog2(prot_interval)) * 8; - return xfer_len + (xfer_len >> ilog2(sector_size)) * 8; + return xfer_len; } #endif /* _SCSI_SCSI_CMND_H */ |