The PCI interrupt vectors intended to be associated with a queue may
not start at 0; a driver may allocate pre_vectors for special use. This
patch adds an offset parameter so blk-mq may find the intended affinity
mask and updates all drivers using this API accordingly.
Cc: Don Brace <don.brace@xxxxxxxxxxxxx>
Cc: <qla2xxx-upstream@xxxxxxxxxx>
Cc: <linux-scsi@xxxxxxxxxxxxxxx>
Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
---
v1 -> v2:
Update blk-mq API directly instead of chaining a default parameter to
a new API, and update all drivers accordingly.
block/blk-mq-pci.c | 6 ++++--
drivers/nvme/host/pci.c | 2 +-
drivers/scsi/qla2xxx/qla_os.c | 2 +-
drivers/scsi/smartpqi/smartpqi_init.c | 2 +-
include/linux/blk-mq-pci.h | 3 ++-
5 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/block/blk-mq-pci.c b/block/blk-mq-pci.c
index 76944e3271bf..e233996bb76f 100644
--- a/block/blk-mq-pci.c
+++ b/block/blk-mq-pci.c
@@ -21,6 +21,7 @@
* blk_mq_pci_map_queues - provide a default queue mapping for PCI device
* @set: tagset to provide the mapping for
* @pdev: PCI device associated with @set.
+ * @offset: Offset to use for the pci irq vector
*
* This function assumes the PCI device @pdev has at least as many available
* interrupt vectors as @set has queues. It will then query the vector
@@ -28,13 +29,14 @@
* that maps a queue to the CPUs that have irq affinity for the corresponding
* vector.
*/
-int blk_mq_pci_map_queues(struct blk_mq_tag_set *set, struct pci_dev *pdev)
+int blk_mq_pci_map_queues(struct blk_mq_tag_set *set, struct pci_dev *pdev,
+ int offset)
{
const struct cpumask *mask;
unsigned int queue, cpu;
for (queue = 0; queue < set->nr_hw_queues; queue++) {
- mask = pci_irq_get_affinity(pdev, queue);
+ mask = pci_irq_get_affinity(pdev, queue + offset);
if (!mask)
goto fallback;
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index cef5ce851a92..e3b9efca0571 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -414,7 +414,7 @@ static int nvme_pci_map_queues(struct blk_mq_tag_set *set)
{
struct nvme_dev *dev = set->driver_data;
- return blk_mq_pci_map_queues(set, to_pci_dev(dev->dev));
+ return blk_mq_pci_map_queues(set, to_pci_dev(dev->dev), 0);
}
/**
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 12ee6e02d146..2c705f3dd265 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -6805,7 +6805,7 @@ static int qla2xxx_map_queues(struct Scsi_Host *shost)
if (USER_CTRL_IRQ(vha->hw))
rc = blk_mq_map_queues(&shost->tag_set);
else
- rc = blk_mq_pci_map_queues(&shost->tag_set, vha->hw->pdev);
+ rc = blk_mq_pci_map_queues(&shost->tag_set, vha->hw->pdev, 0);
return rc;
}
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index b2880c7709e6..10c94011c8a8 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -5348,7 +5348,7 @@ static int pqi_map_queues(struct Scsi_Host *shost)
{
struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
- return blk_mq_pci_map_queues(&shost->tag_set, ctrl_info->pci_dev);
+ return blk_mq_pci_map_queues(&shost->tag_set, ctrl_info->pci_dev, 0);
}
static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
diff --git a/include/linux/blk-mq-pci.h b/include/linux/blk-mq-pci.h
index 6338551e0fb9..9f4c17f0d2d8 100644
--- a/include/linux/blk-mq-pci.h
+++ b/include/linux/blk-mq-pci.h
@@ -5,6 +5,7 @@
struct blk_mq_tag_set;
struct pci_dev;
-int blk_mq_pci_map_queues(struct blk_mq_tag_set *set, struct pci_dev *pdev);
+int blk_mq_pci_map_queues(struct blk_mq_tag_set *set, struct pci_dev *pdev,
+ int offset);
#endif /* _LINUX_BLK_MQ_PCI_H */
--
2.14.3
