From 1a107c87ebcf04ede1b86e5de192df34b6e50bd7 Mon Sep 17 00:00:00 2001 From: Xuan Zhuo Date: Mon, 1 Aug 2022 14:38:40 +0800 Subject: [PATCH] virtio_ring: packed: extract the logic of vring init Separate the logic of initializing vring, and subsequent patches will call it separately. This function completes the variable initialization of packed vring. It together with the logic of atatch constitutes the initialization of vring. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang Message-Id: <20220801063902.129329-21-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin --- drivers/virtio/virtio_ring.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 533af061..a6f90e6 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1932,6 +1932,22 @@ err_desc_state: return -ENOMEM; } +static void virtqueue_vring_init_packed(struct vring_virtqueue_packed *vring_packed, + bool callback) +{ + vring_packed->next_avail_idx = 0; + vring_packed->avail_wrap_counter = 1; + vring_packed->event_flags_shadow = 0; + vring_packed->avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL; + + /* No callback? Tell other side not to bother us. */ + if (!callback) { + vring_packed->event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE; + vring_packed->vring.driver->flags = + cpu_to_le16(vring_packed->event_flags_shadow); + } +} + static struct virtqueue *vring_create_virtqueue_packed( unsigned int index, unsigned int num, @@ -1986,11 +2002,6 @@ static struct virtqueue *vring_create_virtqueue_packed( vq->packed.vring = vring_packed.vring; - vq->packed.next_avail_idx = 0; - vq->packed.avail_wrap_counter = 1; - vq->packed.event_flags_shadow = 0; - vq->packed.avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL; - err = vring_alloc_state_extra_packed(&vring_packed); if (err) goto err_state_extra; @@ -2001,12 +2012,7 @@ static struct virtqueue *vring_create_virtqueue_packed( vq->packed.desc_state = vring_packed.desc_state; vq->packed.desc_extra = vring_packed.desc_extra; - /* No callback? Tell other side not to bother us. */ - if (!callback) { - vq->packed.event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE; - vq->packed.vring.driver->flags = - cpu_to_le16(vq->packed.event_flags_shadow); - } + virtqueue_vring_init_packed(&vring_packed, !!callback); virtqueue_init(vq, num); -- 2.7.4