From patchwork Fri Jun 24 02:55:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12893478 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9B8C3C433EF for ; Fri, 24 Jun 2022 02:57:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231350AbiFXC47 (ORCPT ); Thu, 23 Jun 2022 22:56:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44082 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230465AbiFXC45 (ORCPT ); Thu, 23 Jun 2022 22:56:57 -0400 Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE57460E2E; Thu, 23 Jun 2022 19:56:46 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R601e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046050;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=37;SR=0;TI=SMTPD_---0VHF1UA6_1656039399; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0VHF1UA6_1656039399) by smtp.aliyun-inc.com; Fri, 24 Jun 2022 10:56:40 +0800 From: Xuan Zhuo 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 Subject: [PATCH v10 08/41] virtio_ring: introduce virtqueue_init() Date: Fri, 24 Jun 2022 10:55:48 +0800 Message-Id: <20220624025621.128843-9-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220624025621.128843-1-xuanzhuo@linux.alibaba.com> References: <20220624025621.128843-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: fef800c86cd2 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org Separate the logic of virtqueue initialization. This logic is irrelevant to ring layout. This logic can be called independently when implementing resize/reset later. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 59 +++++++++++++++++------------------- 1 file changed, 28 insertions(+), 31 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 973892606144..7bc1eecff7fe 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -366,6 +366,31 @@ 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) +{ + struct virtio_device *vdev; + + vdev = vq->vq.vdev; + + vq->vq.num_free = num; + 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->event = virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX); + + if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM)) + vq->weak_barriers = false; + + /* Put everything in free lists. */ + vq->free_head = 0; +} + /* * Split ring specific functions - *_split(). @@ -1686,28 +1711,15 @@ 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; vq->weak_barriers = weak_barriers; vq->broken = true; - vq->last_used_idx = 0; - 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; - vq->event = virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX); - - if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM)) - vq->weak_barriers = false; vq->packed.ring_dma_addr = ring_dma_addr; vq->packed.driver_event_dma_addr = driver_event_dma_addr; @@ -1736,8 +1748,7 @@ static struct virtqueue *vring_create_virtqueue_packed( memset(vq->packed.desc_state, 0, num * sizeof(struct vring_desc_state_packed)); - /* Put everything in free lists. */ - vq->free_head = 0; + virtqueue_init(vq, num); vq->packed.desc_extra = vring_alloc_desc_extra(num); if (!vq->packed.desc_extra) @@ -2178,27 +2189,13 @@ 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; vq->weak_barriers = weak_barriers; vq->broken = true; - 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; - vq->event = virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX); - - if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM)) - vq->weak_barriers = false; vq->split.queue_dma_addr = 0; vq->split.queue_size_in_bytes = 0; @@ -2224,11 +2221,11 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, if (!vq->split.desc_extra) goto err_extra; - /* Put everything in free lists. */ - vq->free_head = 0; memset(vq->split.desc_state, 0, vring.num * sizeof(struct vring_desc_state_split)); + virtqueue_init(vq, vq->split.vring.num); + spin_lock(&vdev->vqs_list_lock); list_add_tail(&vq->vq.list, &vdev->vqs); spin_unlock(&vdev->vqs_list_lock);