From patchwork Wed Jun 29 06:56:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12899444 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 CA653C43334 for ; Wed, 29 Jun 2022 06:58:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231217AbiF2G6T (ORCPT ); Wed, 29 Jun 2022 02:58:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37434 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232646AbiF2G5q (ORCPT ); Wed, 29 Jun 2022 02:57:46 -0400 Received: from out30-45.freemail.mail.aliyun.com (out30-45.freemail.mail.aliyun.com [115.124.30.45]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CC5E3313A3; Tue, 28 Jun 2022 23:57:39 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R441e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046060;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=37;SR=0;TI=SMTPD_---0VHmYOvc_1656485853; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0VHmYOvc_1656485853) by smtp.aliyun-inc.com; Wed, 29 Jun 2022 14:57:34 +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 v11 17/40] virtio_ring: packed: extract the logic of alloc state and extra Date: Wed, 29 Jun 2022 14:56:33 +0800 Message-Id: <20220629065656.54420-18-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220629065656.54420-1-xuanzhuo@linux.alibaba.com> References: <20220629065656.54420-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 3fdaf102dd89 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Separate the logic for alloc desc_state and desc_extra, which will be called separately by subsequent patches. Use struct vring_packed to pass desc_state, desc_extra. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 48 +++++++++++++++++++++++++----------- 1 file changed, 34 insertions(+), 14 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 891257d9cdf8..0c4109eb6c6c 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1902,6 +1902,33 @@ static int vring_alloc_queue_packed(struct vring_virtqueue_packed *vring, return -ENOMEM; } +static int vring_alloc_state_extra_packed(struct vring_virtqueue_packed *vring) +{ + struct vring_desc_state_packed *state; + struct vring_desc_extra *extra; + u32 num = vring->vring.num; + + state = kmalloc_array(num, sizeof(struct vring_desc_state_packed), GFP_KERNEL); + if (!state) + goto err_desc_state; + + memset(state, 0, num * sizeof(struct vring_desc_state_packed)); + + extra = vring_alloc_desc_extra(num); + if (!extra) + goto err_desc_extra; + + vring->desc_state = state; + vring->desc_extra = extra; + + return 0; + +err_desc_extra: + kfree(state); +err_desc_state: + return -ENOMEM; +} + static struct virtqueue *vring_create_virtqueue_packed( unsigned int index, unsigned int num, @@ -1916,6 +1943,7 @@ static struct virtqueue *vring_create_virtqueue_packed( { struct vring_virtqueue_packed vring = {}; struct vring_virtqueue *vq; + int err; if (vring_alloc_queue_packed(&vring, vdev, num)) goto err_ring; @@ -1955,21 +1983,15 @@ static struct virtqueue *vring_create_virtqueue_packed( vq->packed.event_flags_shadow = 0; vq->packed.avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL; - vq->packed.desc_state = kmalloc_array(num, - sizeof(struct vring_desc_state_packed), - GFP_KERNEL); - if (!vq->packed.desc_state) - goto err_desc_state; + err = vring_alloc_state_extra_packed(&vring); + if (err) + goto err_state_extra; - memset(vq->packed.desc_state, 0, - num * sizeof(struct vring_desc_state_packed)); + vq->packed.desc_state = vring.desc_state; + vq->packed.desc_extra = vring.desc_extra; virtqueue_init(vq, num); - vq->packed.desc_extra = vring_alloc_desc_extra(num); - if (!vq->packed.desc_extra) - goto err_desc_extra; - /* No callback? Tell other side not to bother us. */ if (!callback) { vq->packed.event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE; @@ -1982,9 +2004,7 @@ static struct virtqueue *vring_create_virtqueue_packed( spin_unlock(&vdev->vqs_list_lock); return &vq->vq; -err_desc_extra: - kfree(vq->packed.desc_state); -err_desc_state: +err_state_extra: kfree(vq); err_vq: vring_free_packed(&vring, vdev);