From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out30-56.freemail.mail.aliyun.com ([115.124.30.56]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oGEuJ-009LAM-Li for linux-um@lists.infradead.org; Tue, 26 Jul 2022 07:23:10 +0000 From: Xuan Zhuo Subject: [PATCH v13 18/42] virtio_ring: packed: extract the logic of alloc queue Date: Tue, 26 Jul 2022 15:22:01 +0800 Message-Id: <20220726072225.19884-19-xuanzhuo@linux.alibaba.com> In-Reply-To: <20220726072225.19884-1-xuanzhuo@linux.alibaba.com> References: <20220726072225.19884-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-um" Errors-To: linux-um-bounces+geert=linux-m68k.org@lists.infradead.org To: virtualization@lists.linux-foundation.org Cc: Richard Weinberger , Anton Ivanov , Johannes Berg , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Eric Farman , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Xuan Zhuo , Vincent Whitchurch , linux-um@lists.infradead.org, netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, bpf@vger.kernel.org, kangjie.xu@linux.alibaba.com Separate the logic of packed to create vring queue. This feature is required for subsequent virtuqueue reset vring. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 80 +++++++++++++++++++++++------------- 1 file changed, 51 insertions(+), 29 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 891900b31c3d..10cc2b7e3588 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1857,19 +1857,10 @@ static void vring_free_packed(struct vring_virtqueue_packed *vring_packed, kfree(vring_packed->desc_extra); } -static struct virtqueue *vring_create_virtqueue_packed( - unsigned int index, - unsigned int num, - unsigned int vring_align, - struct virtio_device *vdev, - bool weak_barriers, - bool may_reduce_num, - bool context, - bool (*notify)(struct virtqueue *), - void (*callback)(struct virtqueue *), - const char *name) +static int vring_alloc_queue_packed(struct vring_virtqueue_packed *vring_packed, + struct virtio_device *vdev, + u32 num) { - struct vring_virtqueue *vq; struct vring_packed_desc *ring; struct vring_packed_desc_event *driver, *device; dma_addr_t ring_dma_addr, driver_event_dma_addr, device_event_dma_addr; @@ -1881,7 +1872,11 @@ static struct virtqueue *vring_create_virtqueue_packed( &ring_dma_addr, GFP_KERNEL|__GFP_NOWARN|__GFP_ZERO); if (!ring) - goto err_ring; + goto err; + + vring_packed->vring.desc = ring; + vring_packed->ring_dma_addr = ring_dma_addr; + vring_packed->ring_size_in_bytes = ring_size_in_bytes; event_size_in_bytes = sizeof(struct vring_packed_desc_event); @@ -1889,13 +1884,47 @@ static struct virtqueue *vring_create_virtqueue_packed( &driver_event_dma_addr, GFP_KERNEL|__GFP_NOWARN|__GFP_ZERO); if (!driver) - goto err_driver; + goto err; + + vring_packed->vring.driver = driver; + vring_packed->event_size_in_bytes = event_size_in_bytes; + vring_packed->driver_event_dma_addr = driver_event_dma_addr; device = vring_alloc_queue(vdev, event_size_in_bytes, &device_event_dma_addr, GFP_KERNEL|__GFP_NOWARN|__GFP_ZERO); if (!device) - goto err_device; + goto err; + + vring_packed->vring.device = device; + vring_packed->device_event_dma_addr = device_event_dma_addr; + + vring_packed->vring.num = num; + + return 0; + +err: + vring_free_packed(vring_packed, vdev); + return -ENOMEM; +} + +static struct virtqueue *vring_create_virtqueue_packed( + unsigned int index, + unsigned int num, + unsigned int vring_align, + struct virtio_device *vdev, + bool weak_barriers, + bool may_reduce_num, + bool context, + bool (*notify)(struct virtqueue *), + void (*callback)(struct virtqueue *), + const char *name) +{ + struct vring_virtqueue_packed vring_packed = {}; + struct vring_virtqueue *vq; + + if (vring_alloc_queue_packed(&vring_packed, vdev, num)) + goto err_ring; vq = kmalloc(sizeof(*vq), GFP_KERNEL); if (!vq) @@ -1918,17 +1947,14 @@ static struct virtqueue *vring_create_virtqueue_packed( vq->indirect = virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC) && !context; - vq->packed.ring_dma_addr = ring_dma_addr; - vq->packed.driver_event_dma_addr = driver_event_dma_addr; - vq->packed.device_event_dma_addr = device_event_dma_addr; + vq->packed.ring_dma_addr = vring_packed.ring_dma_addr; + vq->packed.driver_event_dma_addr = vring_packed.driver_event_dma_addr; + vq->packed.device_event_dma_addr = vring_packed.device_event_dma_addr; - vq->packed.ring_size_in_bytes = ring_size_in_bytes; - vq->packed.event_size_in_bytes = event_size_in_bytes; + vq->packed.ring_size_in_bytes = vring_packed.ring_size_in_bytes; + vq->packed.event_size_in_bytes = vring_packed.event_size_in_bytes; - vq->packed.vring.num = num; - vq->packed.vring.desc = ring; - vq->packed.vring.driver = driver; - vq->packed.vring.device = device; + vq->packed.vring = vring_packed.vring; vq->packed.next_avail_idx = 0; vq->packed.avail_wrap_counter = 1; @@ -1967,11 +1993,7 @@ static struct virtqueue *vring_create_virtqueue_packed( err_desc_state: kfree(vq); err_vq: - vring_free_queue(vdev, event_size_in_bytes, device, device_event_dma_addr); -err_device: - vring_free_queue(vdev, event_size_in_bytes, driver, driver_event_dma_addr); -err_driver: - vring_free_queue(vdev, ring_size_in_bytes, ring, ring_dma_addr); + vring_free_packed(&vring_packed, vdev); err_ring: return NULL; } -- 2.31.0 _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um