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Commit 9c6aa9d7 authored by James Smart's avatar James Smart Committed by James Bottomley
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[SCSI] lpfc 8.3.40: Fix BlockGuard error checking 

Signed-off-by: default avatarJames Smart <james.smart@emulex.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent 3bf41ba9
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Showing with 62 additions and 47 deletions
drivers/scsi/lpfc/lpfc_scsi.c
View file @ 9c6aa9d7
......@@ -68,14 +68,12 @@ struct scsi_dif_tuple {
__be32 ref_tag; /* Target LBA or indirect LBA */
};
#if !defined(SCSI_PROT_GUARD_CHECK) || !defined(SCSI_PROT_REF_CHECK)
#define scsi_prot_flagged(sc, flg) sc
#endif
static void
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
static void
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
static int
lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
static void
lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
......@@ -134,6 +132,30 @@ lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
}
}
static inline unsigned
lpfc_cmd_blksize(struct scsi_cmnd *sc)
{
return sc->device->sector_size;
}
#define LPFC_CHECK_PROTECT_GUARD 1
#define LPFC_CHECK_PROTECT_REF 2
static inline unsigned
lpfc_cmd_protect(struct scsi_cmnd *sc, int flag)
{
return 1;
}
static inline unsigned
lpfc_cmd_guard_csum(struct scsi_cmnd *sc)
{
if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF)
return 0;
if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP)
return 1;
return 0;
}
/**
* lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
* @phba: Pointer to HBA object.
......@@ -1409,12 +1431,6 @@ lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
return 0;
}
static inline unsigned
lpfc_cmd_blksize(struct scsi_cmnd *sc)
{
return sc->device->sector_size;
}
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
/* Return if if error injection is detected by Initiator */
......@@ -1847,10 +1863,9 @@ static int
lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
uint8_t *txop, uint8_t *rxop)
{
uint8_t guard_type = scsi_host_get_guard(sc->device->host);
uint8_t ret = 0;
if (guard_type == SHOST_DIX_GUARD_IP) {
if (lpfc_cmd_guard_csum(sc)) {
switch (scsi_get_prot_op(sc)) {
case SCSI_PROT_READ_INSERT:
case SCSI_PROT_WRITE_STRIP:
......@@ -1928,10 +1943,9 @@ static int
lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
uint8_t *txop, uint8_t *rxop)
{
uint8_t guard_type = scsi_host_get_guard(sc->device->host);
uint8_t ret = 0;
if (guard_type == SHOST_DIX_GUARD_IP) {
if (lpfc_cmd_guard_csum(sc)) {
switch (scsi_get_prot_op(sc)) {
case SCSI_PROT_READ_INSERT:
case SCSI_PROT_WRITE_STRIP:
......@@ -2078,12 +2092,12 @@ lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
* protection data is automatically generated, not checked.
*/
if (datadir == DMA_FROM_DEVICE) {
if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
bf_set(pde6_ce, pde6, checking);
else
bf_set(pde6_ce, pde6, 0);
if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
bf_set(pde6_re, pde6, checking);
else
bf_set(pde6_re, pde6, 0);
......@@ -2240,12 +2254,12 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
bf_set(pde6_optx, pde6, txop);
bf_set(pde6_oprx, pde6, rxop);
if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
bf_set(pde6_ce, pde6, checking);
else
bf_set(pde6_ce, pde6, 0);
if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
bf_set(pde6_re, pde6, checking);
else
bf_set(pde6_re, pde6, 0);
......@@ -2454,12 +2468,12 @@ lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
* protection data is automatically generated, not checked.
*/
if (sc->sc_data_direction == DMA_FROM_DEVICE) {
if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
else
bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
else
bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
......@@ -2610,7 +2624,7 @@ lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
diseed->ref_tag = cpu_to_le32(reftag);
diseed->ref_tag_tran = diseed->ref_tag;
if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK)) {
if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
} else {
......@@ -2629,7 +2643,7 @@ lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
}
if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
else
bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
......@@ -2792,11 +2806,12 @@ lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
ret = LPFC_PG_TYPE_DIF_BUF;
break;
default:
if (phba)
lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
"9021 Unsupported protection op:%d\n", op);
"9021 Unsupported protection op:%d\n",
op);
break;
}
return ret;
}
......@@ -2821,21 +2836,21 @@ lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
/* Check if there is protection data on the wire */
if (sc->sc_data_direction == DMA_FROM_DEVICE) {
/* Read */
/* Read check for protection data */
if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT)
return fcpdl;
} else {
/* Write */
/* Write check for protection data */
if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP)
return fcpdl;
}
/*
* If we are in DIF Type 1 mode every data block has a 8 byte
* DIF (trailer) attached to it. Must ajust FCP data length.
* DIF (trailer) attached to it. Must ajust FCP data length
* to account for the protection data.
*/
if (scsi_prot_flagged(sc, SCSI_PROT_TRANSFER_PI))
fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
return fcpdl;
......@@ -3090,12 +3105,20 @@ lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
goto skipit;
}
/* App Tag checking */
app_tag = src->app_tag;
if (chk_app && (app_tag != start_app_tag)) {
err_type = BGS_APPTAG_ERR_MASK;
/* First Guard Tag checking */
if (chk_guard) {
guard_tag = src->guard_tag;
if (lpfc_cmd_guard_csum(cmd))
sum = lpfc_bg_csum(data_src,
blksize);
else
sum = lpfc_bg_crc(data_src,
blksize);
if ((guard_tag != sum)) {
err_type = BGS_GUARD_ERR_MASK;
goto out;
}
}
/* Reference Tag checking */
ref_tag = be32_to_cpu(src->ref_tag);
......@@ -3105,20 +3128,12 @@ lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
}
start_ref_tag++;
/* Guard Tag checking */
if (chk_guard) {
guard_tag = src->guard_tag;
if (guard_type == SHOST_DIX_GUARD_IP)
sum = lpfc_bg_csum(data_src,
blksize);
else
sum = lpfc_bg_crc(data_src,
blksize);
if ((guard_tag != sum)) {
err_type = BGS_GUARD_ERR_MASK;
/* App Tag checking */
app_tag = src->app_tag;
if (chk_app && (app_tag != start_app_tag)) {
err_type = BGS_APPTAG_ERR_MASK;
goto out;
}
}
skipit:
len -= sizeof(struct scsi_dif_tuple);
if (len < 0)
......
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