T10 DIF Fixes
- Fix the case where the SCSI Host supplies the CRC and driver to controller
protection is on.
- Only support T10 DIF type 1. LBA always goes in ref tag and app tag is not
checked.
- Change the format of the sense data passed up to the SCSI layer to match the
Descriptor Format Sense Data found in SPC-4 sections 4.5.2.1 and 4.5.2.2.
- Fix Slip PDE implementation.
- Remove BUG() in else casein lpfc_sc_to_bg_opcodes.
Signed-off-by: Alex Iannicelli <alex.iannicelli@xxxxxxxxxx>
Signed-off-by: James Smart <james.smart@xxxxxxxxxx>
---
lpfc_attr.c | 4 +-
lpfc_scsi.c | 97 ++++++++++++++++++------------------------------------------
2 files changed, 33 insertions(+), 68 deletions(-)
diff -upNr a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
--- a/drivers/scsi/lpfc/lpfc_attr.c 2011-07-06 10:53:52.000000000 -0400
+++ b/drivers/scsi/lpfc/lpfc_attr.c 2011-07-22 15:58:40.000000000 -0400
@@ -3678,7 +3678,9 @@ LPFC_ATTR_R(enable_bg, 0, 0, 1, "Enable
# - Default will result in registering capabilities for all profiles.
#
*/
-unsigned int lpfc_prot_mask = SHOST_DIF_TYPE1_PROTECTION;
+unsigned int lpfc_prot_mask = SHOST_DIF_TYPE1_PROTECTION |
+ SHOST_DIX_TYPE0_PROTECTION |
+ SHOST_DIX_TYPE1_PROTECTION;
module_param(lpfc_prot_mask, uint, S_IRUGO);
MODULE_PARM_DESC(lpfc_prot_mask, "host protection mask");
diff -upNr a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
--- a/drivers/scsi/lpfc/lpfc_scsi.c 2011-07-06 10:53:52.000000000 -0400
+++ b/drivers/scsi/lpfc/lpfc_scsi.c 2011-07-22 15:58:40.000000000 -0400
@@ -1302,13 +1302,13 @@ lpfc_sc_to_bg_opcodes(struct lpfc_hba *p
case SCSI_PROT_NORMAL:
default:
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
- "9063 BLKGRD: Bad op/guard:%d/%d combination\n",
- scsi_get_prot_op(sc), guard_type);
+ "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
+ scsi_get_prot_op(sc));
ret = 1;
break;
}
- } else if (guard_type == SHOST_DIX_GUARD_CRC) {
+ } else {
switch (scsi_get_prot_op(sc)) {
case SCSI_PROT_READ_STRIP:
case SCSI_PROT_WRITE_INSERT:
@@ -1324,17 +1324,18 @@ lpfc_sc_to_bg_opcodes(struct lpfc_hba *p
case SCSI_PROT_READ_INSERT:
case SCSI_PROT_WRITE_STRIP:
+ *txop = BG_OP_IN_CRC_OUT_NODIF;
+ *rxop = BG_OP_IN_NODIF_OUT_CRC;
+ break;
+
case SCSI_PROT_NORMAL:
default:
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
- "9075 BLKGRD: Bad op/guard:%d/%d combination\n",
- scsi_get_prot_op(sc), guard_type);
+ "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
+ scsi_get_prot_op(sc));
ret = 1;
break;
}
- } else {
- /* unsupported format */
- BUG();
}
return ret;
@@ -1352,45 +1353,6 @@ lpfc_cmd_blksize(struct scsi_cmnd *sc)
return sc->device->sector_size;
}
-/**
- * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command
- * @sc: in: SCSI command
- * @apptagmask: out: app tag mask
- * @apptagval: out: app tag value
- * @reftag: out: ref tag (reference tag)
- *
- * Description:
- * Extract DIF parameters from the command if possible. Otherwise,
- * use default parameters.
- *
- **/
-static inline void
-lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask,
- uint16_t *apptagval, uint32_t *reftag)
-{
- struct scsi_dif_tuple *spt;
- unsigned char op = scsi_get_prot_op(sc);
- unsigned int protcnt = scsi_prot_sg_count(sc);
- static int cnt;
-
- if (protcnt && (op == SCSI_PROT_WRITE_STRIP ||
- op == SCSI_PROT_WRITE_PASS)) {
-
- cnt++;
- spt = page_address(sg_page(scsi_prot_sglist(sc))) +
- scsi_prot_sglist(sc)[0].offset;
- *apptagmask = 0;
- *apptagval = 0;
- *reftag = cpu_to_be32(spt->ref_tag);
-
- } else {
- /* SBC defines ref tag to be lower 32bits of LBA */
- *reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc));
- *apptagmask = 0;
- *apptagval = 0;
- }
-}
-
/*
* This function sets up buffer list for protection groups of
* type LPFC_PG_TYPE_NO_DIF
@@ -1427,9 +1389,8 @@ lpfc_bg_setup_bpl(struct lpfc_hba *phba,
dma_addr_t physaddr;
int i = 0, num_bde = 0, status;
int datadir = sc->sc_data_direction;
- unsigned blksize;
uint32_t reftag;
- uint16_t apptagmask, apptagval;
+ unsigned blksize;
uint8_t txop, rxop;
status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
@@ -1438,17 +1399,16 @@ lpfc_bg_setup_bpl(struct lpfc_hba *phba,
/* extract some info from the scsi command for pde*/
blksize = lpfc_cmd_blksize(sc);
- lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
+ reftag = scsi_get_lba(sc) & 0xffffffff;
/* setup PDE5 with what we have */
pde5 = (struct lpfc_pde5 *) bpl;
memset(pde5, 0, sizeof(struct lpfc_pde5));
bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
- pde5->reftag = reftag;
/* Endianness conversion if necessary for PDE5 */
pde5->word0 = cpu_to_le32(pde5->word0);
- pde5->reftag = cpu_to_le32(pde5->reftag);
+ pde5->reftag = cpu_to_le32(reftag);
/* advance bpl and increment bde count */
num_bde++;
@@ -1463,10 +1423,10 @@ lpfc_bg_setup_bpl(struct lpfc_hba *phba,
if (datadir == DMA_FROM_DEVICE) {
bf_set(pde6_ce, pde6, 1);
bf_set(pde6_re, pde6, 1);
- bf_set(pde6_ae, pde6, 1);
}
bf_set(pde6_ai, pde6, 1);
- bf_set(pde6_apptagval, pde6, apptagval);
+ bf_set(pde6_ae, pde6, 0);
+ bf_set(pde6_apptagval, pde6, 0);
/* Endianness conversion if necessary for PDE6 */
pde6->word0 = cpu_to_le32(pde6->word0);
@@ -1551,7 +1511,6 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *
unsigned char pgdone = 0, alldone = 0;
unsigned blksize;
uint32_t reftag;
- uint16_t apptagmask, apptagval;
uint8_t txop, rxop;
int num_bde = 0;
@@ -1571,7 +1530,7 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *
/* extract some info from the scsi command */
blksize = lpfc_cmd_blksize(sc);
- lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
+ reftag = scsi_get_lba(sc) & 0xffffffff;
split_offset = 0;
do {
@@ -1579,11 +1538,10 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *
pde5 = (struct lpfc_pde5 *) bpl;
memset(pde5, 0, sizeof(struct lpfc_pde5));
bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
- pde5->reftag = reftag;
/* Endianness conversion if necessary for PDE5 */
pde5->word0 = cpu_to_le32(pde5->word0);
- pde5->reftag = cpu_to_le32(pde5->reftag);
+ pde5->reftag = cpu_to_le32(reftag);
/* advance bpl and increment bde count */
num_bde++;
@@ -1597,9 +1555,9 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *
bf_set(pde6_oprx, pde6, rxop);
bf_set(pde6_ce, pde6, 1);
bf_set(pde6_re, pde6, 1);
- bf_set(pde6_ae, pde6, 1);
bf_set(pde6_ai, pde6, 1);
- bf_set(pde6_apptagval, pde6, apptagval);
+ bf_set(pde6_ae, pde6, 0);
+ bf_set(pde6_apptagval, pde6, 0);
/* Endianness conversion if necessary for PDE6 */
pde6->word0 = cpu_to_le32(pde6->word0);
@@ -1621,8 +1579,8 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *
memset(pde7, 0, sizeof(struct lpfc_pde7));
bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
- pde7->addrHigh = le32_to_cpu(putPaddrLow(protphysaddr));
- pde7->addrLow = le32_to_cpu(putPaddrHigh(protphysaddr));
+ pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
+ pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
protgrp_blks = protgroup_len / 8;
protgrp_bytes = protgrp_blks * blksize;
@@ -1632,7 +1590,7 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *
protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
protgroup_offset += protgroup_remainder;
protgrp_blks = protgroup_remainder / 8;
- protgrp_bytes = protgroup_remainder * blksize;
+ protgrp_bytes = protgrp_blks * blksize;
} else {
protgroup_offset = 0;
curr_prot++;
@@ -2006,16 +1964,21 @@ lpfc_parse_bg_err(struct lpfc_hba *phba,
if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
/*
* setup sense data descriptor 0 per SPC-4 as an information
- * field, and put the failing LBA in it
+ * field, and put the failing LBA in it.
+ * This code assumes there was also a guard/app/ref tag error
+ * indication.
*/
- cmd->sense_buffer[8] = 0; /* Information */
- cmd->sense_buffer[9] = 0xa; /* Add. length */
+ cmd->sense_buffer[7] = 0xc; /* Additional sense length */
+ cmd->sense_buffer[8] = 0; /* Information descriptor type */
+ cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */
+ cmd->sense_buffer[10] = 0x80; /* Validity bit */
bghm /= cmd->device->sector_size;
failing_sector = scsi_get_lba(cmd);
failing_sector += bghm;
- put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]);
+ /* Descriptor Information */
+ put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
}
if (!ret) {
--
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