summaryrefslogtreecommitdiff
path: root/drivers/scsi
diff options
context:
space:
mode:
authorMichael Hernandez <michael.hernandez@cavium.com>2016-12-13 01:40:08 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2016-12-14 23:37:59 +0300
commit5601236b6f7948cd1783298f6d4cacce02e22fde (patch)
tree231c6677224f5c68c586648b3109aac6cba01e57 /drivers/scsi
parentd74595278f4ab192af66d9e60a9087464638beee (diff)
downloadlinux-5601236b6f7948cd1783298f6d4cacce02e22fde.tar.xz
scsi: qla2xxx: Add Block Multi Queue functionality.
Tell the SCSI layer how many hardware queues we have based on the number of max queue pairs created. The number of max queue pairs created will depend on number of MSI-X vector count. This feature can be turned on via CONFIG_SCSI_MQ_DEFAULT or passing scsi_mod.use_blk_mq=Y as a parameter to the kernel Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Sawan Chandak <sawan.chandak@cavium.com> Signed-off-by: Michael Hernandez <michael.hernandez@cavium.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/qla2xxx/qla_os.c47
1 files changed, 42 insertions, 5 deletions
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 6ef32c932826..d10a8763caaf 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -13,6 +13,7 @@
#include <linux/mutex.h>
#include <linux/kobject.h>
#include <linux/slab.h>
+#include <linux/blk-mq-pci.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsicam.h>
#include <scsi/scsi_transport.h>
@@ -254,6 +255,7 @@ static int qla2xxx_eh_host_reset(struct scsi_cmnd *);
static void qla2x00_clear_drv_active(struct qla_hw_data *);
static void qla2x00_free_device(scsi_qla_host_t *);
static void qla83xx_disable_laser(scsi_qla_host_t *vha);
+static int qla2xxx_map_queues(struct Scsi_Host *shost);
struct scsi_host_template qla2xxx_driver_template = {
.module = THIS_MODULE,
@@ -273,6 +275,7 @@ struct scsi_host_template qla2xxx_driver_template = {
.scan_finished = qla2xxx_scan_finished,
.scan_start = qla2xxx_scan_start,
.change_queue_depth = scsi_change_queue_depth,
+ .map_queues = qla2xxx_map_queues,
.this_id = -1,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
@@ -738,16 +741,26 @@ qla2xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
srb_t *sp;
int rval;
- struct qla_qpair *qpair;
+ struct qla_qpair *qpair = NULL;
+ uint32_t tag;
+ uint16_t hwq;
if (unlikely(test_bit(UNLOADING, &base_vha->dpc_flags))) {
cmd->result = DID_NO_CONNECT << 16;
goto qc24_fail_command;
}
- if (vha->vp_idx && vha->qpair) {
- qpair = vha->qpair;
- return qla2xxx_mqueuecommand(host, cmd, qpair);
+ if (ha->mqenable) {
+ if (shost_use_blk_mq(vha->host)) {
+ tag = blk_mq_unique_tag(cmd->request);
+ hwq = blk_mq_unique_tag_to_hwq(tag);
+ qpair = ha->queue_pair_map[hwq];
+ } else if (vha->vp_idx && vha->qpair) {
+ qpair = vha->qpair;
+ }
+
+ if (qpair)
+ return qla2xxx_mqueuecommand(host, cmd, qpair);
}
if (ha->flags.eeh_busy) {
@@ -2509,6 +2522,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
uint16_t req_length = 0, rsp_length = 0;
struct req_que *req = NULL;
struct rsp_que *rsp = NULL;
+ int i;
bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
sht = &qla2xxx_driver_template;
@@ -2874,6 +2888,16 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
goto probe_init_failed;
}
+ if (ha->mqenable && shost_use_blk_mq(host)) {
+ /* number of hardware queues supported by blk/scsi-mq*/
+ host->nr_hw_queues = ha->max_qpairs;
+
+ ql_dbg(ql_dbg_init, base_vha, 0x0192,
+ "blk/scsi-mq enabled, HW queues = %d.\n", host->nr_hw_queues);
+ } else
+ ql_dbg(ql_dbg_init, base_vha, 0x0193,
+ "blk/scsi-mq disabled.\n");
+
qlt_probe_one_stage1(base_vha, ha);
pci_save_state(pdev);
@@ -2965,8 +2989,14 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
host->can_queue, base_vha->req,
base_vha->mgmt_svr_loop_id, host->sg_tablesize);
- if (ha->mqenable)
+ if (ha->mqenable) {
ha->wq = alloc_workqueue("qla2xxx_wq", WQ_MEM_RECLAIM, 1);
+ /* Create start of day qpairs for Block MQ */
+ if (shost_use_blk_mq(host)) {
+ for (i = 0; i < ha->max_qpairs; i++)
+ qla2xxx_create_qpair(base_vha, 5, 0);
+ }
+ }
if (ha->flags.running_gold_fw)
goto skip_dpc;
@@ -6109,6 +6139,13 @@ qla83xx_disable_laser(scsi_qla_host_t *vha)
qla83xx_wr_reg(vha, reg, data);
}
+static int qla2xxx_map_queues(struct Scsi_Host *shost)
+{
+ scsi_qla_host_t *vha = (scsi_qla_host_t *)shost->hostdata;
+
+ return blk_mq_pci_map_queues(&shost->tag_set, vha->hw->pdev);
+}
+
static const struct pci_error_handlers qla2xxx_err_handler = {
.error_detected = qla2xxx_pci_error_detected,
.mmio_enabled = qla2xxx_pci_mmio_enabled,