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| author | Xuan Zhuo <xuanzhuo@linux.alibaba.com> | 2022-08-01 08:38:26 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-08-11 10:06:38 +0200 |
| commit | 3a897128d3193459a87551e54a7f0a71edb65153 (patch) | |
| tree | e1c0d70dc1d5077742bc28879752bf3383e50469 /drivers/virtio/virtio_ring.c | |
| parent | virtio_ring: split vring_virtqueue (diff) | |
| download | linux-3a897128d3193459a87551e54a7f0a71edb65153.tar.xz linux-3a897128d3193459a87551e54a7f0a71edb65153.zip | |
virtio_ring: introduce virtqueue_init()
Separate the logic of virtqueue initialization. These variables should
be reset during reset.
This logic can be called independently when implementing resize/reset
later.
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220801063902.129329-7-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio/virtio_ring.c')
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 1bc5794e9739..a63ef2d99955 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -368,6 +368,24 @@ static int vring_mapping_error(const struct vring_virtqueue *vq, return dma_mapping_error(vring_dma_dev(vq), addr); } +static void virtqueue_init(struct vring_virtqueue *vq, u32 num) +{ + vq->vq.num_free = num; + + if (vq->packed_ring) + vq->last_used_idx = 0 | (1 << VRING_PACKED_EVENT_F_WRAP_CTR); + else + vq->last_used_idx = 0; + + vq->event_triggered = false; + vq->num_added = 0; + +#ifdef DEBUG + vq->in_use = false; + vq->last_add_time_valid = false; +#endif +} + /* * Split ring specific functions - *_split(). @@ -1706,7 +1724,6 @@ static struct virtqueue *vring_create_virtqueue_packed( vq->vq.callback = callback; vq->vq.vdev = vdev; vq->vq.name = name; - vq->vq.num_free = num; vq->vq.index = index; vq->we_own_ring = true; vq->notify = notify; @@ -1716,15 +1733,8 @@ static struct virtqueue *vring_create_virtqueue_packed( #else vq->broken = false; #endif - vq->last_used_idx = 0 | (1 << VRING_PACKED_EVENT_F_WRAP_CTR); - vq->event_triggered = false; - vq->num_added = 0; vq->packed_ring = true; vq->use_dma_api = vring_use_dma_api(vdev); -#ifdef DEBUG - vq->in_use = false; - vq->last_add_time_valid = false; -#endif vq->indirect = virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC) && !context; @@ -1773,6 +1783,8 @@ static struct virtqueue *vring_create_virtqueue_packed( cpu_to_le16(vq->packed.event_flags_shadow); } + virtqueue_init(vq, num); + spin_lock(&vdev->vqs_list_lock); list_add_tail(&vq->vq.list, &vdev->vqs); spin_unlock(&vdev->vqs_list_lock); @@ -2205,7 +2217,6 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, vq->vq.callback = callback; vq->vq.vdev = vdev; vq->vq.name = name; - vq->vq.num_free = vring.num; vq->vq.index = index; vq->we_own_ring = false; vq->notify = notify; @@ -2215,14 +2226,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, #else vq->broken = false; #endif - vq->last_used_idx = 0; - vq->event_triggered = false; - vq->num_added = 0; vq->use_dma_api = vring_use_dma_api(vdev); -#ifdef DEBUG - vq->in_use = false; - vq->last_add_time_valid = false; -#endif vq->indirect = virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC) && !context; @@ -2260,6 +2264,8 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, memset(vq->split.desc_state, 0, vring.num * sizeof(struct vring_desc_state_split)); + virtqueue_init(vq, vring.num); + spin_lock(&vdev->vqs_list_lock); list_add_tail(&vq->vq.list, &vdev->vqs); spin_unlock(&vdev->vqs_list_lock); |