From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out30-42.freemail.mail.aliyun.com ([115.124.30.42]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nbwah-003dwK-DX for linux-um@lists.infradead.org; Wed, 06 Apr 2022 03:44:22 +0000 From: Xuan Zhuo Subject: [PATCH v9 12/32] virtio_ring: packed: extract the logic of alloc queue Date: Wed, 6 Apr 2022 11:43:26 +0800 Message-Id: <20220406034346.74409-13-xuanzhuo@linux.alibaba.com> In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-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: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Separate the logic of packed to create vring queue. For the convenience of passing parameters, add a structure vring_packed. This feature is required for subsequent virtuqueue reset vring. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 70 ++++++++++++++++++++++++++++-------- 1 file changed, 56 insertions(+), 14 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 33864134a744..ea451ae2aaef 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1817,19 +1817,17 @@ static struct vring_desc_extra *vring_alloc_desc_extra(unsigned int num) return 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 virtio_device *vdev, + u32 num, + struct vring_packed_desc **_ring, + struct vring_packed_desc_event **_driver, + struct vring_packed_desc_event **_device, + dma_addr_t *_ring_dma_addr, + dma_addr_t *_driver_event_dma_addr, + dma_addr_t *_device_event_dma_addr, + size_t *_ring_size_in_bytes, + size_t *_event_size_in_bytes) { - 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; @@ -1857,6 +1855,52 @@ static struct virtqueue *vring_create_virtqueue_packed( if (!device) goto err_device; + *_ring = ring; + *_driver = driver; + *_device = device; + *_ring_dma_addr = ring_dma_addr; + *_driver_event_dma_addr = driver_event_dma_addr; + *_device_event_dma_addr = device_event_dma_addr; + *_ring_size_in_bytes = ring_size_in_bytes; + *_event_size_in_bytes = event_size_in_bytes; + + return 0; + +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); + +err_ring: + 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) +{ + dma_addr_t ring_dma_addr, driver_event_dma_addr, device_event_dma_addr; + struct vring_packed_desc_event *driver, *device; + size_t ring_size_in_bytes, event_size_in_bytes; + struct vring_packed_desc *ring; + struct vring_virtqueue *vq; + + if (vring_alloc_queue_packed(vdev, num, &ring, &driver, &device, + &ring_dma_addr, &driver_event_dma_addr, + &device_event_dma_addr, + &ring_size_in_bytes, + &event_size_in_bytes)) + goto err_ring; + vq = kmalloc(sizeof(*vq), GFP_KERNEL); if (!vq) goto err_vq; @@ -1939,9 +1983,7 @@ static struct virtqueue *vring_create_virtqueue_packed( 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); err_ring: return NULL; -- 2.31.0 _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um