scsi: lpfc: Expand WQE capability of every NVME hardware queue
Hardware queues are a fast staging area to push commands into the
adapter. The adapter should drain them extremely quickly. However,
under heavy io load, the host cpu is pushing commands faster than the
drain rate of the adapter causing the driver to resource busy commands.
Enlarge the hardware queue (wq & cq) to support a larger number of queue
entries (4x the prior size) before backpressure. Enlarging the queue
requires larger contiguous buffers (16k) per logical page for the
hardware. This changed calling sequences that were expecting 4K page
sizes that now must pass a parameter with the page sizes. It also
required use of a new version of an adapter command that can vary the
page size values.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h
index 2b14596..73c2f69 100644
--- a/drivers/scsi/lpfc/lpfc_hw4.h
+++ b/drivers/scsi/lpfc/lpfc_hw4.h
@@ -1122,6 +1122,7 @@ struct cq_context {
#define LPFC_CQ_CNT_256 0x0
#define LPFC_CQ_CNT_512 0x1
#define LPFC_CQ_CNT_1024 0x2
+#define LPFC_CQ_CNT_WORD7 0x3
uint32_t word1;
#define lpfc_cq_eq_id_SHIFT 22 /* Version 0 Only */
#define lpfc_cq_eq_id_MASK 0x000000FF
@@ -1129,7 +1130,7 @@ struct cq_context {
#define lpfc_cq_eq_id_2_SHIFT 0 /* Version 2 Only */
#define lpfc_cq_eq_id_2_MASK 0x0000FFFF
#define lpfc_cq_eq_id_2_WORD word1
- uint32_t reserved0;
+ uint32_t lpfc_cq_context_count; /* Version 2 Only */
uint32_t reserved1;
};
@@ -1193,6 +1194,9 @@ struct lpfc_mbx_cq_create_set {
#define lpfc_mbx_cq_create_set_arm_SHIFT 31
#define lpfc_mbx_cq_create_set_arm_MASK 0x00000001
#define lpfc_mbx_cq_create_set_arm_WORD word2
+#define lpfc_mbx_cq_create_set_cq_cnt_SHIFT 16
+#define lpfc_mbx_cq_create_set_cq_cnt_MASK 0x00007FFF
+#define lpfc_mbx_cq_create_set_cq_cnt_WORD word2
#define lpfc_mbx_cq_create_set_num_cq_SHIFT 0
#define lpfc_mbx_cq_create_set_num_cq_MASK 0x0000FFFF
#define lpfc_mbx_cq_create_set_num_cq_WORD word2