From: Shreyas Deodhar <sdeodhar@xxxxxxxxxxx>
Add ql2xnvme_queues module parameter to configure number of NVME queues
Usage:
Number of NVMe Queues that can be configured.
Final value will be min(ql2xnvme_queues, num_cpus, num_chip_queues),
1 - Minimum number of queues supported
128 - Maximum number of queues supported
8 - Default value
Signed-off-by: Shreyas Deodhar <sdeodhar@xxxxxxxxxxx>
Signed-off-by: Nilesh Javali <njavali@xxxxxxxxxxx>
---
drivers/scsi/qla2xxx/qla_gbl.h | 1 +
drivers/scsi/qla2xxx/qla_nvme.c | 16 ++++++++++++++--
drivers/scsi/qla2xxx/qla_nvme.h | 4 ++++
drivers/scsi/qla2xxx/qla_os.c | 8 ++++++++
4 files changed, 27 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index 3f8b8bbabe6d..cedc347e3c33 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -192,6 +192,7 @@ extern int ql2xfulldump_on_mpifail;
extern int ql2xsecenable;
extern int ql2xenforce_iocb_limit;
extern int ql2xabts_wait_nvme;
+extern u32 ql2xnvme_queues;
extern int qla2x00_loop_reset(scsi_qla_host_t *);
extern void qla2x00_abort_all_cmds(scsi_qla_host_t *, int);
diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index e22ec7cb65db..718c761ff5f8 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -710,7 +710,7 @@ static struct nvme_fc_port_template qla_nvme_fc_transport = {
.fcp_io = qla_nvme_post_cmd,
.fcp_abort = qla_nvme_fcp_abort,
.map_queues = qla_nvme_map_queues,
- .max_hw_queues = 8,
+ .max_hw_queues = DEF_NVME_HW_QUEUES,
.max_sgl_segments = 1024,
.max_dif_sgl_segments = 64,
.dma_boundary = 0xFFFFFFFF,
@@ -779,10 +779,22 @@ int qla_nvme_register_hba(struct scsi_qla_host *vha)
WARN_ON(vha->nvme_local_port);
+ if (ql2xnvme_queues < MIN_NVME_HW_QUEUES || ql2xnvme_queues > MAX_NVME_HW_QUEUES) {
+ ql_log(ql_log_warn, vha, 0xfffd,
+ "ql2xnvme_queues=%d is out of range(MIN:%d - MAX:%d). Resetting ql2xnvme_queues to:%d\n",
+ ql2xnvme_queues, MIN_NVME_HW_QUEUES, MAX_NVME_HW_QUEUES,
+ DEF_NVME_HW_QUEUES);
+ ql2xnvme_queues = DEF_NVME_HW_QUEUES;
+ }
+
qla_nvme_fc_transport.max_hw_queues =
- min((uint8_t)(qla_nvme_fc_transport.max_hw_queues),
+ min((uint8_t)(ql2xnvme_queues),
(uint8_t)(ha->max_qpairs ? ha->max_qpairs : 1));
+ ql_log(ql_log_info, vha, 0xfffb,
+ "Number of NVME queues used for this port: %d\n",
+ qla_nvme_fc_transport.max_hw_queues);
+
pinfo.node_name = wwn_to_u64(vha->node_name);
pinfo.port_name = wwn_to_u64(vha->port_name);
pinfo.port_role = FC_PORT_ROLE_NVME_INITIATOR;
diff --git a/drivers/scsi/qla2xxx/qla_nvme.h b/drivers/scsi/qla2xxx/qla_nvme.h
index f81f219c7c7d..d0e3c0e07baa 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.h
+++ b/drivers/scsi/qla2xxx/qla_nvme.h
@@ -13,6 +13,10 @@
#include "qla_def.h"
#include "qla_dsd.h"
+#define MIN_NVME_HW_QUEUES 1
+#define MAX_NVME_HW_QUEUES 128
+#define DEF_NVME_HW_QUEUES 8
+
#define NVME_ATIO_CMD_OFF 32
#define NVME_FIRST_PACKET_CMDLEN (64 - NVME_ATIO_CMD_OFF)
#define Q2T_NVME_NUM_TAGS 2048
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index c4b4b4496399..7d5159306112 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -338,6 +338,14 @@ static void qla2x00_free_device(scsi_qla_host_t *);
static int qla2xxx_map_queues(struct Scsi_Host *shost);
static void qla2x00_destroy_deferred_work(struct qla_hw_data *);
+u32 ql2xnvme_queues = DEF_NVME_HW_QUEUES;
+module_param(ql2xnvme_queues, uint, S_IRUGO);
+MODULE_PARM_DESC(ql2xnvme_queues,
+ "Number of NVMe Queues that can be configured.\n"
+ "Final value will be min(ql2xnvme_queues, num_cpus,num_chip_queues)\n"
+ "1 - Minimum number of queues supported\n"
+ "128 - Maximum number of queues supported\n"
+ "8 - Default value");
static struct scsi_transport_template *qla2xxx_transport_template = NULL;
struct scsi_transport_template *qla2xxx_transport_vport_template = NULL;
--
2.23.1
