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[Qemu-devel] [PATCH RFC 13/14] hw/block/virtio-blk: create num_queues vq
From: |
Ming Lei |
Subject: |
[Qemu-devel] [PATCH RFC 13/14] hw/block/virtio-blk: create num_queues vqs if dataplane is enabled |
Date: |
Thu, 17 Jul 2014 00:31:20 +0800 |
Now we only support multi vqs for dataplane case.
Signed-off-by: Ming Lei <address@hidden>
---
hw/block/virtio-blk.c | 16 +++++++++++++++-
include/hw/virtio/virtio-blk.h | 3 +++
2 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index ab99156..160b021 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -556,6 +556,7 @@ static void virtio_blk_update_config(VirtIODevice *vdev,
uint8_t *config)
blkcfg.physical_block_exp = get_physical_block_exp(s->conf);
blkcfg.alignment_offset = 0;
blkcfg.wce = bdrv_enable_write_cache(s->bs);
+ stw_p(&blkcfg.num_queues, s->blk.num_queues);
memcpy(config, &blkcfg, sizeof(struct virtio_blk_config));
}
@@ -590,6 +591,12 @@ static uint32_t virtio_blk_get_features(VirtIODevice
*vdev, uint32_t features)
if (bdrv_is_read_only(s->bs))
features |= 1 << VIRTIO_BLK_F_RO;
+#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
+ if (s->blk.num_queues > 1) {
+ features |= 1 << VIRTIO_BLK_F_MQ;
+ }
+#endif
+
return features;
}
@@ -739,8 +746,13 @@ static void virtio_blk_device_realize(DeviceState *dev,
Error **errp)
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
Error *err = NULL;
#endif
+ int i;
static int virtio_blk_id;
+#ifndef CONFIG_VIRTIO_BLK_DATA_PLANE
+ blk->num_queues = 1;
+#endif
+
if (!blk->conf.bs) {
error_setg(errp, "drive property not set");
return;
@@ -765,7 +777,9 @@ static void virtio_blk_device_realize(DeviceState *dev,
Error **errp)
s->rq = NULL;
s->sector_mask = (s->conf->logical_block_size / BDRV_SECTOR_SIZE) - 1;
- s->vq = virtio_add_queue(vdev, 128, virtio_blk_handle_output);
+ for (i = 0; i < blk->num_queues; i++)
+ s->vqs[i] = virtio_add_queue(vdev, 128, virtio_blk_handle_output);
+ s->vq = s->vqs[0];
s->complete_request = virtio_blk_complete_request;
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
virtio_blk_data_plane_create(vdev, blk, &s->dataplane, &err);
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
index ad70c9a..91489b0 100644
--- a/include/hw/virtio/virtio-blk.h
+++ b/include/hw/virtio/virtio-blk.h
@@ -50,6 +50,8 @@
#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */
+#define VIRTIO_BLK_MAX_VQS 16 /* max virtio queues supported now */
+
struct virtio_blk_config
{
uint64_t capacity;
@@ -132,6 +134,7 @@ typedef struct VirtIOBlock {
VirtIODevice parent_obj;
BlockDriverState *bs;
VirtQueue *vq;
+ VirtQueue *vqs[VIRTIO_BLK_MAX_VQS];
void *rq;
QEMUBH *bh;
BlockConf *conf;
--
1.7.9.5
- [Qemu-devel] [PATCH RFC 03/14] block: support to bypass qemu coroutinue, (continued)
- [Qemu-devel] [PATCH RFC 03/14] block: support to bypass qemu coroutinue, Ming Lei, 2014/07/16
- [Qemu-devel] [PATCH RFC 04/14] Revert "raw-posix: drop raw_get_aio_fd() since it is no longer used", Ming Lei, 2014/07/16
- [Qemu-devel] [PATCH RFC 05/14] dataplane: enable selective bypassing coroutine, Ming Lei, 2014/07/16
- [Qemu-devel] [PATCH RFC 06/14] qemu/obj_pool.h: introduce object allocation pool, Ming Lei, 2014/07/16
- [Qemu-devel] [PATCH RFC 07/14] dataplane: use object pool to speed up allocation for virtio blk request, Ming Lei, 2014/07/16
- [Qemu-devel] [PATCH RFC 08/14] linux-aio: fix submit aio as a batch, Ming Lei, 2014/07/16
- [Qemu-devel] [PATCH RFC 09/14] linux-aio: increase max event to 256, Ming Lei, 2014/07/16
- [Qemu-devel] [PATCH RFC 10/14] linux-aio: remove 'node' from 'struct qemu_laiocb', Ming Lei, 2014/07/16
- [Qemu-devel] [PATCH RFC 11/14] hw/virtio-pci: introduce num_queues property, Ming Lei, 2014/07/16
- [Qemu-devel] [PATCH RFC 12/14] hw/virtio/virtio-blk.h: introduce VIRTIO_BLK_F_MQ, Ming Lei, 2014/07/16
- [Qemu-devel] [PATCH RFC 13/14] hw/block/virtio-blk: create num_queues vqs if dataplane is enabled,
Ming Lei <=
- [Qemu-devel] [PATCH RFC 14/14] dataplane: virtio-blk: support mutlti virtqueue, Ming Lei, 2014/07/16