From: Christoph Hellwig <hch@lst.de>
To: tglx@linutronix.de
Cc: axboe@kernel.dk, linux-block@vger.kernel.org,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 7/7] blk-mq: add a first_vec argument to blk_mq_pci_map_queues
Date: Mon, 7 Nov 2016 10:47:42 -0800 [thread overview]
Message-ID: <1478544462-9549-8-git-send-email-hch@lst.de> (raw)
In-Reply-To: <1478544462-9549-1-git-send-email-hch@lst.de>
This allows skipping the first N IRQ vectors in case they are used for
control or admin interrupts.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
block/blk-mq-pci.c | 6 ++++--
drivers/nvme/host/pci.c | 2 +-
include/linux/blk-mq-pci.h | 3 ++-
3 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/block/blk-mq-pci.c b/block/blk-mq-pci.c
index 966c216..03ff7c4 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.
+ * @first_vec: first interrupt vectors to use for queues (usually 0)
*
* This function assumes the PCI device @pdev has at least as many available
* interrupt vetors as @set has queues. It will then queuery the vector
@@ -28,12 +29,13 @@
* 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 first_vec)
{
const struct cpumask *mask;
unsigned int queue, cpu;
- for (queue = 0; queue < set->nr_hw_queues; queue++) {
+ for (queue = first_vec; queue < set->nr_hw_queues; queue++) {
mask = pci_irq_get_affinity(pdev, queue);
if (!mask)
return -EINVAL;
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 0248d0e..6e6b917 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -273,7 +273,7 @@ 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/include/linux/blk-mq-pci.h b/include/linux/blk-mq-pci.h
index 6ab5952..fde26d2 100644
--- a/include/linux/blk-mq-pci.h
+++ b/include/linux/blk-mq-pci.h
@@ -4,6 +4,7 @@
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 first_vec);
#endif /* _LINUX_BLK_MQ_PCI_H */
--
2.1.4
next prev parent reply other threads:[~2016-11-07 18:49 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-07 18:47 support for partial irq affinity assignment Christoph Hellwig
2016-11-07 18:47 ` [PATCH 1/7] genirq/affinity: Introduce struct irq_affinity Christoph Hellwig
2016-11-08 8:11 ` Hannes Reinecke
2016-11-08 8:19 ` Johannes Thumshirn
2016-11-08 21:25 ` Bjorn Helgaas
2016-11-08 22:30 ` Christoph Hellwig
2016-11-07 18:47 ` [PATCH 2/7] genirq/affinity: Handle pre/post vectors in irq_calc_affinity_vectors() Christoph Hellwig
2016-11-08 8:14 ` Hannes Reinecke
2016-11-08 14:40 ` Thomas Gleixner
2016-11-07 18:47 ` [PATCH 3/7] genirq/affinity: Handle pre/post vectors in irq_create_affinity_masks() Christoph Hellwig
2016-11-08 8:15 ` Hannes Reinecke
2016-11-08 14:55 ` Christoph Hellwig
2016-11-08 14:59 ` Hannes Reinecke
2016-11-08 15:00 ` Christoph Hellwig
2016-11-08 16:27 ` Thomas Gleixner
2016-11-08 16:33 ` Christoph Hellwig
2016-11-08 21:20 ` Bjorn Helgaas
2016-11-07 18:47 ` [PATCH 4/7] pci/msi: Propagate irq affinity description through the MSI code Christoph Hellwig
2016-11-08 8:16 ` Hannes Reinecke
2016-11-08 8:24 ` Johannes Thumshirn
2016-11-08 21:18 ` Bjorn Helgaas
2016-11-07 18:47 ` [PATCH 5/7] pci/msi: Provide pci_alloc_irq_vectors_affinity() Christoph Hellwig
2016-11-08 8:17 ` Hannes Reinecke
2016-11-08 8:27 ` Johannes Thumshirn
2016-11-08 21:17 ` Bjorn Helgaas
2016-11-08 21:20 ` Christoph Hellwig
2016-11-07 18:47 ` [PATCH 6/7] pci: Remove the irq_affinity mask from struct pci_dev Christoph Hellwig
2016-11-08 8:17 ` Hannes Reinecke
2016-11-08 8:27 ` Johannes Thumshirn
2016-11-08 20:59 ` Bjorn Helgaas
2016-11-07 18:47 ` Christoph Hellwig [this message]
2016-11-08 8:27 ` [PATCH 7/7] blk-mq: add a first_vec argument to blk_mq_pci_map_queues Johannes Thumshirn
2016-11-09 1:15 support for partial irq affinity assignment V3 Christoph Hellwig
2016-11-09 1:15 ` [PATCH 7/7] blk-mq: add a first_vec argument to blk_mq_pci_map_queues Christoph Hellwig
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