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authorLinus Torvalds <torvalds@linux-foundation.org>2017-03-02 13:53:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-03-02 13:53:13 -0800
commit54d7989f476ca57fc3c5cc71524c480ccb74c481 (patch)
tree62a6b61edac708358d949af6c44b9ea3eb02c6fc /drivers/block
parent0f221a3102bba2d982d01bad38eb68507c343830 (diff)
parentc4baad50297d84bde1a7ad45e50c73adae4a2192 (diff)
downloadlinux-54d7989f476ca57fc3c5cc71524c480ccb74c481.tar.bz2
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull vhost updates from Michael Tsirkin: "virtio, vhost: optimizations, fixes Looks like a quiet cycle for vhost/virtio, just a couple of minor tweaks. Most notable is automatic interrupt affinity for blk and scsi. Hopefully other devices are not far behind" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio-console: avoid DMA from stack vhost: introduce O(1) vq metadata cache virtio_scsi: use virtio IRQ affinity virtio_blk: use virtio IRQ affinity blk-mq: provide a default queue mapping for virtio device virtio: provide a method to get the IRQ affinity mask for a virtqueue virtio: allow drivers to request IRQ affinity when creating VQs virtio_pci: simplify MSI-X setup virtio_pci: don't duplicate the msix_enable flag in struct pci_dev virtio_pci: use shared interrupts for virtqueues virtio_pci: remove struct virtio_pci_vq_info vhost: try avoiding avail index access when getting descriptor virtio_mmio: expose header to userspace
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/virtio_blk.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 024b473524c0..1d4c9f8bc1e1 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -5,6 +5,7 @@
#include <linux/hdreg.h>
#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/interrupt.h>
#include <linux/virtio.h>
#include <linux/virtio_blk.h>
#include <linux/scatterlist.h>
@@ -12,6 +13,7 @@
#include <scsi/scsi_cmnd.h>
#include <linux/idr.h>
#include <linux/blk-mq.h>
+#include <linux/blk-mq-virtio.h>
#include <linux/numa.h>
#define PART_BITS 4
@@ -426,6 +428,7 @@ static int init_vq(struct virtio_blk *vblk)
struct virtqueue **vqs;
unsigned short num_vqs;
struct virtio_device *vdev = vblk->vdev;
+ struct irq_affinity desc = { 0, };
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_MQ,
struct virtio_blk_config, num_queues,
@@ -452,7 +455,8 @@ static int init_vq(struct virtio_blk *vblk)
}
/* Discover virtqueues and write information to configuration. */
- err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names);
+ err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names,
+ &desc);
if (err)
goto out;
@@ -586,10 +590,18 @@ static int virtblk_init_request(void *data, struct request *rq,
return 0;
}
+static int virtblk_map_queues(struct blk_mq_tag_set *set)
+{
+ struct virtio_blk *vblk = set->driver_data;
+
+ return blk_mq_virtio_map_queues(set, vblk->vdev, 0);
+}
+
static struct blk_mq_ops virtio_mq_ops = {
.queue_rq = virtio_queue_rq,
.complete = virtblk_request_done,
.init_request = virtblk_init_request,
+ .map_queues = virtblk_map_queues,
};
static unsigned int virtblk_queue_depth;