[SCSI] qla2xxx: T10 DIF support added.
Signed-off-by: Duane Grigsby <duane.grigsby@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index eed71ea..be3d8be 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -10,6 +10,7 @@
#include <linux/slab.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_bsg_fc.h>
+#include <scsi/scsi_eh.h>
static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
static void qla2x00_process_completed_request(struct scsi_qla_host *,
@@ -1364,6 +1365,78 @@
DEBUG5(qla2x00_dump_buffer(cp->sense_buffer, sense_len));
}
+struct scsi_dif_tuple {
+ __be16 guard; /* Checksum */
+ __be16 app_tag; /* APPL identifer */
+ __be32 ref_tag; /* Target LBA or indirect LBA */
+};
+
+/*
+ * Checks the guard or meta-data for the type of error
+ * detected by the HBA. In case of errors, we set the
+ * ASC/ASCQ fields in the sense buffer with ILLEGAL_REQUEST
+ * to indicate to the kernel that the HBA detected error.
+ */
+static inline void
+qla2x00_handle_dif_error(srb_t *sp, struct sts_entry_24xx *sts24)
+{
+ 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];
+ 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);
+
+ DEBUG18(printk(KERN_DEBUG
+ "%s(): iocb(s) %p Returned STATUS\n", __func__, sts24));
+
+ DEBUG18(printk(KERN_ERR "DIF ERROR in cmd 0x%x lba 0x%llx act ref"
+ " tag=0x%x, exp ref_tag=0x%x, act app tag=0x%x, exp app"
+ " tag=0x%x, act guard=0x%x, exp guard=0x%x\n",
+ cmd->cmnd[0], (u64)scsi_get_lba(cmd), a_ref_tag, e_ref_tag,
+ a_app_tag, e_app_tag, a_guard, e_guard));
+
+
+ /* check guard */
+ if (e_guard != a_guard) {
+ scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
+ 0x10, 0x1);
+ set_driver_byte(cmd, DRIVER_SENSE);
+ set_host_byte(cmd, DID_ABORT);
+ cmd->result |= SAM_STAT_CHECK_CONDITION << 1;
+ return;
+ }
+
+ /* check appl tag */
+ if (e_app_tag != a_app_tag) {
+ scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
+ 0x10, 0x2);
+ set_driver_byte(cmd, DRIVER_SENSE);
+ set_host_byte(cmd, DID_ABORT);
+ cmd->result |= SAM_STAT_CHECK_CONDITION << 1;
+ return;
+ }
+
+ /* check ref tag */
+ if (e_ref_tag != a_ref_tag) {
+ scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
+ 0x10, 0x3);
+ set_driver_byte(cmd, DRIVER_SENSE);
+ set_host_byte(cmd, DID_ABORT);
+ cmd->result |= SAM_STAT_CHECK_CONDITION << 1;
+ return;
+ }
+}
+
/**
* qla2x00_status_entry() - Process a Status IOCB entry.
* @ha: SCSI driver HA context
@@ -1630,6 +1703,10 @@
case CS_ABORTED:
cp->result = DID_RESET << 16;
break;
+
+ case CS_DIF_ERROR:
+ qla2x00_handle_dif_error(sp, sts24);
+ break;
default:
cp->result = DID_ERROR << 16;
break;