mutex_unlock(&sd_ref_mutex);
}
-static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif)
-{
- unsigned int prot_op = SCSI_PROT_NORMAL;
- unsigned int dix = scsi_prot_sg_count(scmd);
-
- if (scmd->sc_data_direction == DMA_FROM_DEVICE) {
- if (dif && dix)
- prot_op = SCSI_PROT_READ_PASS;
- else if (dif && !dix)
- prot_op = SCSI_PROT_READ_STRIP;
- else if (!dif && dix)
- prot_op = SCSI_PROT_READ_INSERT;
- } else {
- if (dif && dix)
- prot_op = SCSI_PROT_WRITE_PASS;
- else if (dif && !dix)
- prot_op = SCSI_PROT_WRITE_INSERT;
- else if (!dif && dix)
- prot_op = SCSI_PROT_WRITE_STRIP;
+
+
+static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd,
+ unsigned int dix, unsigned int dif)
+{
+ struct bio *bio = scmd->request->bio;
+ unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif);
+ unsigned int protect = 0;
+
+ if (dix) { /* DIX Type 0, 1, 2, 3 */
+ if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM))
+ scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM;
+
+ if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
+ scmd->prot_flags |= SCSI_PROT_GUARD_CHECK;
+ }
+
+ if (dif != SD_DIF_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */
+ scmd->prot_flags |= SCSI_PROT_REF_INCREMENT;
+
+ if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
+ scmd->prot_flags |= SCSI_PROT_REF_CHECK;
+ }
+
+ if (dif) { /* DIX/DIF Type 1, 2, 3 */
+ scmd->prot_flags |= SCSI_PROT_TRANSFER_PI;
+
+ if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK))
+ protect = 3 << 5; /* Disable target PI checking */
+ else
+ protect = 1 << 5; /* Enable target PI checking */
}
scsi_set_prot_op(scmd, prot_op);
scsi_set_prot_type(scmd, dif);
+ scmd->prot_flags &= sd_prot_flag_mask(prot_op);
+
+ return protect;
}
static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
sector_t block = blk_rq_pos(rq);
sector_t threshold;
unsigned int this_count = blk_rq_sectors(rq);
- int ret, host_dif;
+ unsigned int dif, dix;
+ int ret;
unsigned char protect;
ret = scsi_init_io(SCpnt, GFP_ATOMIC);
SCpnt->cmnd[0] = WRITE_6;
if (blk_integrity_rq(rq))
- sd_dif_prepare(rq, block, sdp->sector_size);
+ sd_dif_prepare(SCpnt);
} else if (rq_data_dir(rq) == READ) {
SCpnt->cmnd[0] = READ_6;
"writing" : "reading", this_count,
blk_rq_sectors(rq)));
- /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */
- host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
- if (host_dif)
- protect = 1 << 5;
+ dix = scsi_prot_sg_count(SCpnt);
+ dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type);
+
+ if (dif || dix)
+ protect = sd_setup_protect_cmnd(SCpnt, dix, dif);
else
protect = 0;
- if (host_dif == SD_DIF_TYPE2_PROTECTION) {
+ if (protect && sdkp->protection_type == SD_DIF_TYPE2_PROTECTION) {
SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC);
if (unlikely(SCpnt->cmnd == NULL)) {
}
SCpnt->sdb.length = this_count * sdp->sector_size;
- /* If DIF or DIX is enabled, tell HBA how to handle request */
- if (host_dif || scsi_prot_sg_count(SCpnt))
- sd_prot_op(SCpnt, host_dif);
-
/*
* We shouldn't disconnect in the middle of a sector, so with a dumb
* host adapter, it's safe to assume that we can at least transfer
SD_DIF_TYPE3_PROTECTION = 0x3,
};
+/*
+ * Look up the DIX operation based on whether the command is read or
+ * write and whether dix and dif are enabled.
+ */
+static inline unsigned int sd_prot_op(bool write, bool dix, bool dif)
+{
+ /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
+ const unsigned int ops[] = { /* wrt dix dif */
+ SCSI_PROT_NORMAL, /* 0 0 0 */
+ SCSI_PROT_READ_STRIP, /* 0 0 1 */
+ SCSI_PROT_READ_INSERT, /* 0 1 0 */
+ SCSI_PROT_READ_PASS, /* 0 1 1 */
+ SCSI_PROT_NORMAL, /* 1 0 0 */
+ SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
+ SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
+ SCSI_PROT_WRITE_PASS, /* 1 1 1 */
+ };
+
+ return ops[write << 2 | dix << 1 | dif];
+}
+
+/*
+ * Returns a mask of the protection flags that are valid for a given DIX
+ * operation.
+ */
+static inline unsigned int sd_prot_flag_mask(unsigned int prot_op)
+{
+ const unsigned int flag_mask[] = {
+ [SCSI_PROT_NORMAL] = 0,
+
+ [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT,
+
+ [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+
+ [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+
+ [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_REF_INCREMENT,
+
+ [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+
+ [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
+ };
+
+ return flag_mask[prot_op];
+}
+
/*
* Data Integrity Field tuple.
*/
#ifdef CONFIG_BLK_DEV_INTEGRITY
extern void sd_dif_config_host(struct scsi_disk *);
-extern void sd_dif_prepare(struct request *rq, sector_t, unsigned int);
+extern void sd_dif_prepare(struct scsi_cmnd *scmd);
extern void sd_dif_complete(struct scsi_cmnd *, unsigned int);
#else /* CONFIG_BLK_DEV_INTEGRITY */
static inline void sd_dif_config_host(struct scsi_disk *disk)
{
}
-static inline int sd_dif_prepare(struct request *rq, sector_t s, unsigned int a)
+static inline int sd_dif_prepare(struct scsi_cmnd *scmd)
{
return 0;
}
*
* Type 3 does not have a reference tag so no remapping is required.
*/
-void sd_dif_prepare(struct request *rq, sector_t hw_sector,
- unsigned int sector_sz)
+void sd_dif_prepare(struct scsi_cmnd *scmd)
{
const int tuple_sz = sizeof(struct t10_pi_tuple);
struct bio *bio;
struct t10_pi_tuple *pi;
u32 phys, virt;
- sdkp = rq->bio->bi_bdev->bd_disk->private_data;
+ sdkp = scsi_disk(scmd->request->rq_disk);
if (sdkp->protection_type == SD_DIF_TYPE3_PROTECTION)
return;
- phys = hw_sector & 0xffffffff;
+ phys = scsi_prot_ref_tag(scmd);
- __rq_for_each_bio(bio, rq) {
+ __rq_for_each_bio(bio, scmd->request) {
struct bio_integrity_payload *bip = bio_integrity(bio);
struct bio_vec iv;
struct bvec_iter iter;
struct scsi_disk *sdkp;
struct bio *bio;
struct t10_pi_tuple *pi;
- unsigned int j, sectors, sector_sz;
+ unsigned int j, intervals;
u32 phys, virt;
sdkp = scsi_disk(scmd->request->rq_disk);
if (sdkp->protection_type == SD_DIF_TYPE3_PROTECTION || good_bytes == 0)
return;
- sector_sz = scmd->device->sector_size;
- sectors = good_bytes / sector_sz;
-
- phys = blk_rq_pos(scmd->request) & 0xffffffff;
- if (sector_sz == 4096)
- phys >>= 3;
+ intervals = good_bytes / scsi_prot_interval(scmd);
+ phys = scsi_prot_ref_tag(scmd);
__rq_for_each_bio(bio, scmd->request) {
struct bio_integrity_payload *bip = bio_integrity(bio);
for (j = 0; j < iv.bv_len; j += tuple_sz, pi++) {
- if (sectors == 0) {
+ if (intervals == 0) {
kunmap_atomic(pi);
return;
}
virt++;
phys++;
- sectors--;
+ intervals--;
}
kunmap_atomic(pi);
*/
#define bio_get(bio) atomic_inc(&(bio)->bi_cnt)
+enum bip_flags {
+ BIP_BLOCK_INTEGRITY = 1 << 0, /* block layer owns integrity data */
+ BIP_MAPPED_INTEGRITY = 1 << 1, /* ref tag has been remapped */
+ BIP_CTRL_NOCHECK = 1 << 2, /* disable HBA integrity checking */
+ BIP_DISK_NOCHECK = 1 << 3, /* disable disk integrity checking */
+ BIP_IP_CHECKSUM = 1 << 4, /* IP checksum */
+};
+
#if defined(CONFIG_BLK_DEV_INTEGRITY)
static inline struct bio_integrity_payload *bio_integrity(struct bio *bio)
struct bio_vec bip_inline_vecs[0];/* embedded bvec array */
};
-enum bip_flags {
- BIP_BLOCK_INTEGRITY = 1 << 0, /* block layer owns integrity data */
- BIP_MAPPED_INTEGRITY = 1 << 1, /* ref tag has been remapped */
- BIP_CTRL_NOCHECK = 1 << 2, /* disable HBA integrity checking */
- BIP_DISK_NOCHECK = 1 << 3, /* disable disk integrity checking */
- BIP_IP_CHECKSUM = 1 << 4, /* IP checksum */
-};
+static inline bool bio_integrity_flagged(struct bio *bio, enum bip_flags flag)
+{
+ struct bio_integrity_payload *bip = bio_integrity(bio);
+
+ if (bip)
+ return bip->bip_flags & flag;
+
+ return false;
+}
static inline sector_t bip_get_seed(struct bio_integrity_payload *bip)
{
#else /* CONFIG_BLK_DEV_INTEGRITY */
-static inline int bio_integrity(struct bio *bio)
+static inline void *bio_integrity(struct bio *bio)
{
- return 0;
+ return NULL;
}
static inline bool bio_integrity_enabled(struct bio *bio)
return;
}
+static inline bool bio_integrity_flagged(struct bio *bio, enum bip_flags flag)
+{
+ return false;
+}
+
#endif /* CONFIG_BLK_DEV_INTEGRITY */
#endif /* CONFIG_BLOCK */
#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.
unsigned char prot_op;
unsigned char prot_type;
+ unsigned char prot_flags;
unsigned short cmd_len;
enum dma_data_direction sc_data_direction;
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
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;
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 */
projects / users / jedix / linux-maple.git / commitdiff