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[SCSI] sd: Detach DIF from block integrity infrastructure

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So far we have only issued DIF commands if CONFIG_BLK_DEV_INTEGRITY is
enabled.  However, communication between initiator and target should be
independent of protection information DMA.  There are DIF-only host
adapters coming out that will be able to take advantage of this.

Move the relevant DIF bits to sd.c.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Martin K. Petersen
2009-09-18 17:33:00 -04:00
committed by James Bottomley
parent c6af404215
commit 35e1a5d90b
4 changed files with 53 additions and 80 deletions
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4
drivers/scsi/sd.h
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@ -101,16 +101,12 @@ struct sd_dif_tuple {
#ifdef CONFIG_BLK_DEV_INTEGRITY
extern void sd_dif_op(struct scsi_cmnd *, unsigned int, unsigned int, unsigned int);
extern void sd_dif_config_host(struct scsi_disk *);
extern int sd_dif_prepare(struct request *rq, sector_t, unsigned int);
extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
#else /* CONFIG_BLK_DEV_INTEGRITY */
static inline void sd_dif_op(struct scsi_cmnd *cmd, unsigned int a, unsigned int b, unsigned int c)
{
}
static inline void sd_dif_config_host(struct scsi_disk *disk)
{
}