[SCSI] qla2xxx: T10 DIF - Handle uninitalized sectors.
Driver needs to update protection bytes for uninitialized sectors as they are
not DMA-d.
Signed-off-by: Arun Easi <arun.easi@qlogic.com>
Reviewed-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 7836eb0..8100670 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -1788,11 +1788,14 @@
if ((IS_QLA25XX(ha) || IS_QLA81XX(ha)) && ql2xenabledif) {
if (ha->fw_attributes & BIT_4) {
+ int prot = 0;
vha->flags.difdix_supported = 1;
ql_dbg(ql_dbg_user, vha, 0x7082,
"Registered for DIF/DIX type 1 and 3 protection.\n");
+ if (ql2xenabledif == 1)
+ prot = SHOST_DIX_TYPE0_PROTECTION;
scsi_host_set_prot(vha->host,
- SHOST_DIF_TYPE1_PROTECTION
+ prot | SHOST_DIF_TYPE1_PROTECTION
| SHOST_DIF_TYPE2_PROTECTION
| SHOST_DIF_TYPE3_PROTECTION
| SHOST_DIX_TYPE1_PROTECTION
diff --git a/drivers/scsi/qla2xxx/qla_fw.h b/drivers/scsi/qla2xxx/qla_fw.h
index 691783a..aa69486 100644
--- a/drivers/scsi/qla2xxx/qla_fw.h
+++ b/drivers/scsi/qla2xxx/qla_fw.h
@@ -537,6 +537,11 @@
/*
* If DIF Error is set in comp_status, these additional fields are
* defined:
+ *
+ * !!! NOTE: Firmware sends expected/actual DIF data in big endian
+ * format; but all of the "data" field gets swab32-d in the beginning
+ * of qla2x00_status_entry().
+ *
* &data[10] : uint8_t report_runt_bg[2]; - computed guard
* &data[12] : uint8_t actual_dif[8]; - DIF Data received
* &data[20] : uint8_t expected_dif[8]; - DIF Data computed
diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h
index d2e904b..c06e5f9 100644
--- a/drivers/scsi/qla2xxx/qla_inline.h
+++ b/drivers/scsi/qla2xxx/qla_inline.h
@@ -102,3 +102,24 @@
fcport->d_id.b.al_pa);
}
}
+
+static inline int
+qla2x00_hba_err_chk_enabled(unsigned char op)
+{
+ switch (op) {
+ case SCSI_PROT_READ_STRIP:
+ case SCSI_PROT_WRITE_INSERT:
+ if (ql2xenablehba_err_chk >= 1)
+ return 1;
+ break;
+ case SCSI_PROT_READ_PASS:
+ case SCSI_PROT_WRITE_PASS:
+ if (ql2xenablehba_err_chk >= 2)
+ return 1;
+ break;
+ case SCSI_PROT_READ_INSERT:
+ case SCSI_PROT_WRITE_STRIP:
+ return 1;
+ }
+ return 0;
+}
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index 49d6906..09ad3ce 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -717,12 +717,17 @@
unsigned char op = scsi_get_prot_op(cmd);
switch (scsi_get_prot_type(cmd)) {
- /* For TYPE 0 protection: no checking */
case SCSI_PROT_DIF_TYPE0:
- pkt->ref_tag_mask[0] = 0x00;
- pkt->ref_tag_mask[1] = 0x00;
- pkt->ref_tag_mask[2] = 0x00;
- pkt->ref_tag_mask[3] = 0x00;
+ /*
+ * No check for ql2xenablehba_err_chk, as it would be an
+ * I/O error if hba tag generation is not done.
+ */
+ pkt->ref_tag = cpu_to_le32((uint32_t)
+ (0xffffffff & scsi_get_lba(cmd)));
+ pkt->ref_tag_mask[0] = 0xff;
+ pkt->ref_tag_mask[1] = 0xff;
+ pkt->ref_tag_mask[2] = 0xff;
+ pkt->ref_tag_mask[3] = 0xff;
break;
/*
@@ -730,7 +735,7 @@
* match LBA in CDB + N
*/
case SCSI_PROT_DIF_TYPE2:
- if (!ql2xenablehba_err_chk)
+ if (!qla2x00_hba_err_chk_enabled(op))
break;
if (scsi_prot_sg_count(cmd)) {
@@ -763,7 +768,7 @@
* 16 bit app tag.
*/
case SCSI_PROT_DIF_TYPE1:
- if (!ql2xenablehba_err_chk)
+ if (!qla2x00_hba_err_chk_enabled(op))
break;
if (protcnt && (op == SCSI_PROT_WRITE_STRIP ||
@@ -798,7 +803,161 @@
scsi_get_prot_type(cmd), cmd);
}
+struct qla2_sgx {
+ dma_addr_t dma_addr; /* OUT */
+ uint32_t dma_len; /* OUT */
+ uint32_t tot_bytes; /* IN */
+ struct scatterlist *cur_sg; /* IN */
+
+ /* for book keeping, bzero on initial invocation */
+ uint32_t bytes_consumed;
+ uint32_t num_bytes;
+ uint32_t tot_partial;
+
+ /* for debugging */
+ uint32_t num_sg;
+ srb_t *sp;
+};
+
+static int
+qla24xx_get_one_block_sg(uint32_t blk_sz, struct qla2_sgx *sgx,
+ uint32_t *partial)
+{
+ struct scatterlist *sg;
+ uint32_t cumulative_partial, sg_len;
+ dma_addr_t sg_dma_addr;
+
+ if (sgx->num_bytes == sgx->tot_bytes)
+ return 0;
+
+ sg = sgx->cur_sg;
+ cumulative_partial = sgx->tot_partial;
+
+ sg_dma_addr = sg_dma_address(sg);
+ sg_len = sg_dma_len(sg);
+
+ sgx->dma_addr = sg_dma_addr + sgx->bytes_consumed;
+
+ if ((cumulative_partial + (sg_len - sgx->bytes_consumed)) >= blk_sz) {
+ sgx->dma_len = (blk_sz - cumulative_partial);
+ sgx->tot_partial = 0;
+ sgx->num_bytes += blk_sz;
+ *partial = 0;
+ } else {
+ sgx->dma_len = sg_len - sgx->bytes_consumed;
+ sgx->tot_partial += sgx->dma_len;
+ *partial = 1;
+ }
+
+ sgx->bytes_consumed += sgx->dma_len;
+
+ if (sg_len == sgx->bytes_consumed) {
+ sg = sg_next(sg);
+ sgx->num_sg++;
+ sgx->cur_sg = sg;
+ sgx->bytes_consumed = 0;
+ }
+
+ return 1;
+}
+
+static int
+qla24xx_walk_and_build_sglist_no_difb(struct qla_hw_data *ha, srb_t *sp,
+ uint32_t *dsd, uint16_t tot_dsds)
+{
+ void *next_dsd;
+ uint8_t avail_dsds = 0;
+ uint32_t dsd_list_len;
+ struct dsd_dma *dsd_ptr;
+ struct scatterlist *sg_prot;
+ uint32_t *cur_dsd = dsd;
+ uint16_t used_dsds = tot_dsds;
+
+ uint32_t prot_int;
+ uint32_t partial;
+ struct qla2_sgx sgx;
+ dma_addr_t sle_dma;
+ uint32_t sle_dma_len, tot_prot_dma_len = 0;
+ struct scsi_cmnd *cmd = sp->cmd;
+
+ prot_int = cmd->device->sector_size;
+
+ memset(&sgx, 0, sizeof(struct qla2_sgx));
+ sgx.tot_bytes = scsi_bufflen(sp->cmd);
+ sgx.cur_sg = scsi_sglist(sp->cmd);
+ sgx.sp = sp;
+
+ sg_prot = scsi_prot_sglist(sp->cmd);
+
+ while (qla24xx_get_one_block_sg(prot_int, &sgx, &partial)) {
+
+ sle_dma = sgx.dma_addr;
+ sle_dma_len = sgx.dma_len;
+alloc_and_fill:
+ /* Allocate additional continuation packets? */
+ if (avail_dsds == 0) {
+ avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
+ QLA_DSDS_PER_IOCB : used_dsds;
+ dsd_list_len = (avail_dsds + 1) * 12;
+ used_dsds -= avail_dsds;
+
+ /* allocate tracking DS */
+ dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
+ if (!dsd_ptr)
+ return 1;
+
+ /* allocate new list */
+ dsd_ptr->dsd_addr = next_dsd =
+ dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
+ &dsd_ptr->dsd_list_dma);
+
+ if (!next_dsd) {
+ /*
+ * Need to cleanup only this dsd_ptr, rest
+ * will be done by sp_free_dma()
+ */
+ kfree(dsd_ptr);
+ return 1;
+ }
+
+ list_add_tail(&dsd_ptr->list,
+ &((struct crc_context *)sp->ctx)->dsd_list);
+
+ sp->flags |= SRB_CRC_CTX_DSD_VALID;
+
+ /* add new list to cmd iocb or last list */
+ *cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
+ *cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
+ *cur_dsd++ = dsd_list_len;
+ cur_dsd = (uint32_t *)next_dsd;
+ }
+ *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
+ *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
+ *cur_dsd++ = cpu_to_le32(sle_dma_len);
+ avail_dsds--;
+
+ if (partial == 0) {
+ /* Got a full protection interval */
+ sle_dma = sg_dma_address(sg_prot) + tot_prot_dma_len;
+ sle_dma_len = 8;
+
+ tot_prot_dma_len += sle_dma_len;
+ if (tot_prot_dma_len == sg_dma_len(sg_prot)) {
+ tot_prot_dma_len = 0;
+ sg_prot = sg_next(sg_prot);
+ }
+
+ partial = 1; /* So as to not re-enter this block */
+ goto alloc_and_fill;
+ }
+ }
+ /* Null termination */
+ *cur_dsd++ = 0;
+ *cur_dsd++ = 0;
+ *cur_dsd++ = 0;
+ return 0;
+}
static int
qla24xx_walk_and_build_sglist(struct qla_hw_data *ha, srb_t *sp, uint32_t *dsd,
uint16_t tot_dsds)
@@ -981,7 +1140,7 @@
struct scsi_cmnd *cmd;
struct scatterlist *cur_seg;
int sgc;
- uint32_t total_bytes;
+ uint32_t total_bytes = 0;
uint32_t data_bytes;
uint32_t dif_bytes;
uint8_t bundling = 1;
@@ -1023,8 +1182,10 @@
__constant_cpu_to_le16(CF_READ_DATA);
}
- tot_prot_dsds = scsi_prot_sg_count(cmd);
- if (!tot_prot_dsds)
+ if ((scsi_get_prot_op(sp->cmd) == SCSI_PROT_READ_INSERT) ||
+ (scsi_get_prot_op(sp->cmd) == SCSI_PROT_WRITE_STRIP) ||
+ (scsi_get_prot_op(sp->cmd) == SCSI_PROT_READ_STRIP) ||
+ (scsi_get_prot_op(sp->cmd) == SCSI_PROT_WRITE_INSERT))
bundling = 0;
/* Allocate CRC context from global pool */
@@ -1107,15 +1268,28 @@
cmd_pkt->fcp_rsp_dseg_len = 0; /* Let response come in status iocb */
/* Compute dif len and adjust data len to incude protection */
- total_bytes = data_bytes;
dif_bytes = 0;
blk_size = cmd->device->sector_size;
- if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
- dif_bytes = (data_bytes / blk_size) * 8;
- total_bytes += dif_bytes;
+ dif_bytes = (data_bytes / blk_size) * 8;
+
+ switch (scsi_get_prot_op(sp->cmd)) {
+ case SCSI_PROT_READ_INSERT:
+ case SCSI_PROT_WRITE_STRIP:
+ total_bytes = data_bytes;
+ data_bytes += dif_bytes;
+ break;
+
+ case SCSI_PROT_READ_STRIP:
+ case SCSI_PROT_WRITE_INSERT:
+ case SCSI_PROT_READ_PASS:
+ case SCSI_PROT_WRITE_PASS:
+ total_bytes = data_bytes + dif_bytes;
+ break;
+ default:
+ BUG();
}
- if (!ql2xenablehba_err_chk)
+ if (!qla2x00_hba_err_chk_enabled(scsi_get_prot_op(cmd)))
fw_prot_opts |= 0x10; /* Disable Guard tag checking */
if (!bundling) {
@@ -1151,7 +1325,12 @@
cmd_pkt->control_flags |=
__constant_cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
- if (qla24xx_walk_and_build_sglist(ha, sp, cur_dsd,
+
+ if (!bundling && tot_prot_dsds) {
+ if (qla24xx_walk_and_build_sglist_no_difb(ha, sp,
+ cur_dsd, tot_dsds))
+ goto crc_queuing_error;
+ } else if (qla24xx_walk_and_build_sglist(ha, sp, cur_dsd,
(tot_dsds - tot_prot_dsds)))
goto crc_queuing_error;
@@ -1414,6 +1593,22 @@
goto queuing_error;
else
sp->flags |= SRB_DMA_VALID;
+
+ if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
+ (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
+ struct qla2_sgx sgx;
+ uint32_t partial;
+
+ memset(&sgx, 0, sizeof(struct qla2_sgx));
+ sgx.tot_bytes = scsi_bufflen(cmd);
+ sgx.cur_sg = scsi_sglist(cmd);
+ sgx.sp = sp;
+
+ nseg = 0;
+ while (qla24xx_get_one_block_sg(
+ cmd->device->sector_size, &sgx, &partial))
+ nseg++;
+ }
} else
nseg = 0;
@@ -1428,6 +1623,11 @@
goto queuing_error;
else
sp->flags |= SRB_CRC_PROT_DMA_VALID;
+
+ if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
+ (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
+ nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
+ }
} else {
nseg = 0;
}
@@ -1454,6 +1654,7 @@
/* Build header part of command packet (excluding the OPCODE). */
req->current_outstanding_cmd = handle;
req->outstanding_cmds[handle] = sp;
+ sp->handle = handle;
sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle;
req->cnt -= req_cnt;
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index b16b772..53339f1 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1435,25 +1435,27 @@
* ASC/ASCQ fields in the sense buffer with ILLEGAL_REQUEST
* to indicate to the kernel that the HBA detected error.
*/
-static inline void
+static inline int
qla2x00_handle_dif_error(srb_t *sp, struct sts_entry_24xx *sts24)
{
struct scsi_qla_host *vha = sp->fcport->vha;
struct scsi_cmnd *cmd = sp->cmd;
- struct scsi_dif_tuple *ep =
- (struct scsi_dif_tuple *)&sts24->data[20];
- struct scsi_dif_tuple *ap =
- (struct scsi_dif_tuple *)&sts24->data[12];
+ uint8_t *ap = &sts24->data[12];
+ uint8_t *ep = &sts24->data[20];
uint32_t e_ref_tag, a_ref_tag;
uint16_t e_app_tag, a_app_tag;
uint16_t e_guard, a_guard;
- e_ref_tag = be32_to_cpu(ep->ref_tag);
- a_ref_tag = be32_to_cpu(ap->ref_tag);
- e_app_tag = be16_to_cpu(ep->app_tag);
- a_app_tag = be16_to_cpu(ap->app_tag);
- e_guard = be16_to_cpu(ep->guard);
- a_guard = be16_to_cpu(ap->guard);
+ /*
+ * swab32 of the "data" field in the beginning of qla2x00_status_entry()
+ * would make guard field appear at offset 2
+ */
+ a_guard = le16_to_cpu(*(uint16_t *)(ap + 2));
+ a_app_tag = le16_to_cpu(*(uint16_t *)(ap + 0));
+ a_ref_tag = le32_to_cpu(*(uint32_t *)(ap + 4));
+ e_guard = le16_to_cpu(*(uint16_t *)(ep + 2));
+ e_app_tag = le16_to_cpu(*(uint16_t *)(ep + 0));
+ e_ref_tag = le32_to_cpu(*(uint32_t *)(ep + 4));
ql_dbg(ql_dbg_io, vha, 0x3023,
"iocb(s) %p Returned STATUS.\n", sts24);
@@ -1465,6 +1467,63 @@
cmd->cmnd[0], (u64)scsi_get_lba(cmd), a_ref_tag, e_ref_tag,
a_app_tag, e_app_tag, a_guard, e_guard);
+ /*
+ * Ignore sector if:
+ * For type 3: ref & app tag is all 'f's
+ * For type 0,1,2: app tag is all 'f's
+ */
+ if ((a_app_tag == 0xffff) &&
+ ((scsi_get_prot_type(cmd) != SCSI_PROT_DIF_TYPE3) ||
+ (a_ref_tag == 0xffffffff))) {
+ uint32_t blocks_done, resid;
+ sector_t lba_s = scsi_get_lba(cmd);
+
+ /* 2TB boundary case covered automatically with this */
+ blocks_done = e_ref_tag - (uint32_t)lba_s + 1;
+
+ resid = scsi_bufflen(cmd) - (blocks_done *
+ cmd->device->sector_size);
+
+ scsi_set_resid(cmd, resid);
+ cmd->result = DID_OK << 16;
+
+ /* Update protection tag */
+ if (scsi_prot_sg_count(cmd)) {
+ uint32_t i, j = 0, k = 0, num_ent;
+ struct scatterlist *sg;
+ struct sd_dif_tuple *spt;
+
+ /* Patch the corresponding protection tags */
+ scsi_for_each_prot_sg(cmd, sg,
+ scsi_prot_sg_count(cmd), i) {
+ num_ent = sg_dma_len(sg) / 8;
+ if (k + num_ent < blocks_done) {
+ k += num_ent;
+ continue;
+ }
+ j = blocks_done - k - 1;
+ k = blocks_done;
+ break;
+ }
+
+ if (k != blocks_done) {
+ qla_printk(KERN_WARNING, sp->fcport->vha->hw,
+ "unexpected tag values tag:lba=%x:%lx)\n",
+ e_ref_tag, lba_s);
+ return 1;
+ }
+
+ spt = page_address(sg_page(sg)) + sg->offset;
+ spt += j;
+
+ spt->app_tag = 0xffff;
+ if (scsi_get_prot_type(cmd) == SCSI_PROT_DIF_TYPE3)
+ spt->ref_tag = 0xffffffff;
+ }
+
+ return 0;
+ }
+
/* check guard */
if (e_guard != a_guard) {
scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
@@ -1472,7 +1531,7 @@
set_driver_byte(cmd, DRIVER_SENSE);
set_host_byte(cmd, DID_ABORT);
cmd->result |= SAM_STAT_CHECK_CONDITION << 1;
- return;
+ return 1;
}
/* check appl tag */
@@ -1482,7 +1541,7 @@
set_driver_byte(cmd, DRIVER_SENSE);
set_host_byte(cmd, DID_ABORT);
cmd->result |= SAM_STAT_CHECK_CONDITION << 1;
- return;
+ return 1;
}
/* check ref tag */
@@ -1492,8 +1551,9 @@
set_driver_byte(cmd, DRIVER_SENSE);
set_host_byte(cmd, DID_ABORT);
cmd->result |= SAM_STAT_CHECK_CONDITION << 1;
- return;
+ return 1;
}
+ return 1;
}
/**
@@ -1767,7 +1827,7 @@
break;
case CS_DIF_ERROR:
- qla2x00_handle_dif_error(sp, sts24);
+ logit = qla2x00_handle_dif_error(sp, sts24);
break;
default:
cp->result = DID_ERROR << 16;
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index e02df27..d65a300 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -106,17 +106,21 @@
"Maximum queue depth to report for target devices.");
/* Do not change the value of this after module load */
-int ql2xenabledif = 1;
+int ql2xenabledif = 0;
module_param(ql2xenabledif, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xenabledif,
" Enable T10-CRC-DIF "
- " Default is 0 - No DIF Support. 1 - Enable it");
+ " Default is 0 - No DIF Support. 1 - Enable it"
+ ", 2 - Enable DIF for all types, except Type 0.");
-int ql2xenablehba_err_chk;
+int ql2xenablehba_err_chk = 2;
module_param(ql2xenablehba_err_chk, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xenablehba_err_chk,
- " Enable T10-CRC-DIF Error isolation by HBA"
- " Default is 0 - Error isolation disabled, 1 - Enable it");
+ " Enable T10-CRC-DIF Error isolation by HBA:\n"
+ " Default is 1.\n"
+ " 0 -- Error isolation disabled\n"
+ " 1 -- Error isolation enabled only for DIX Type 0\n"
+ " 2 -- Error isolation enabled for all Types\n");
int ql2xiidmaenable=1;
module_param(ql2xiidmaenable, int, S_IRUGO);
@@ -2380,11 +2384,14 @@
if ((IS_QLA25XX(ha) || IS_QLA81XX(ha)) && ql2xenabledif) {
if (ha->fw_attributes & BIT_4) {
+ int prot = 0;
base_vha->flags.difdix_supported = 1;
ql_dbg(ql_dbg_init, base_vha, 0x00f1,
"Registering for DIF/DIX type 1 and 3 protection.\n");
+ if (ql2xenabledif == 1)
+ prot = SHOST_DIX_TYPE0_PROTECTION;
scsi_host_set_prot(host,
- SHOST_DIF_TYPE1_PROTECTION
+ prot | SHOST_DIF_TYPE1_PROTECTION
| SHOST_DIF_TYPE2_PROTECTION
| SHOST_DIF_TYPE3_PROTECTION
| SHOST_DIX_TYPE1_PROTECTION