From patchwork Mon Aug 1 06:38:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12933482 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 ED825C00144 for ; Mon, 1 Aug 2022 06:40:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236675AbiHAGk3 (ORCPT ); Mon, 1 Aug 2022 02:40:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230377AbiHAGkB (ORCPT ); Mon, 1 Aug 2022 02:40:01 -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 1F4081570F; Sun, 31 Jul 2022 23:39:35 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R361e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045168;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=37;SR=0;TI=SMTPD_---0VL1aLdp_1659335963; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0VL1aLdp_1659335963) by smtp.aliyun-inc.com; Mon, 01 Aug 2022 14:39:25 +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 v14 11/42] virtio_ring: split: extract the logic of alloc state and extra Date: Mon, 1 Aug 2022 14:38:31 +0800 Message-Id: <20220801063902.129329-12-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220801063902.129329-1-xuanzhuo@linux.alibaba.com> References: <20220801063902.129329-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 0f12e405b061 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Separate the logic of creating desc_state, desc_extra, and subsequent patches will call it independently. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/virtio/virtio_ring.c | 52 +++++++++++++++++++++++++----------- 1 file changed, 36 insertions(+), 16 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 5597a9b9e518..03fc656b1f40 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -212,6 +212,7 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index, bool (*notify)(struct virtqueue *), void (*callback)(struct virtqueue *), const char *name); +static struct vring_desc_extra *vring_alloc_desc_extra(unsigned int num); /* * Helpers. @@ -937,6 +938,32 @@ static void *virtqueue_detach_unused_buf_split(struct virtqueue *_vq) return NULL; } +static int vring_alloc_state_extra_split(struct vring_virtqueue_split *vring_split) +{ + struct vring_desc_state_split *state; + struct vring_desc_extra *extra; + u32 num = vring_split->vring.num; + + state = kmalloc_array(num, sizeof(struct vring_desc_state_split), GFP_KERNEL); + if (!state) + goto err_state; + + extra = vring_alloc_desc_extra(num); + if (!extra) + goto err_extra; + + memset(state, 0, num * sizeof(struct vring_desc_state_split)); + + vring_split->desc_state = state; + vring_split->desc_extra = extra; + return 0; + +err_extra: + kfree(state); +err_state: + return -ENOMEM; +} + static void vring_free_split(struct vring_virtqueue_split *vring_split, struct virtio_device *vdev) { @@ -2240,6 +2267,7 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index, const char *name) { struct vring_virtqueue *vq; + int err; if (virtio_has_feature(vdev, VIRTIO_F_RING_PACKED)) return NULL; @@ -2285,19 +2313,17 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index, vq->split.avail_flags_shadow); } - vq->split.desc_state = kmalloc_array(vring_split->vring.num, - sizeof(struct vring_desc_state_split), GFP_KERNEL); - if (!vq->split.desc_state) - goto err_state; - - vq->split.desc_extra = vring_alloc_desc_extra(vring_split->vring.num); - if (!vq->split.desc_extra) - goto err_extra; + err = vring_alloc_state_extra_split(vring_split); + if (err) { + kfree(vq); + return NULL; + } /* Put everything in free lists. */ vq->free_head = 0; - memset(vq->split.desc_state, 0, vring_split->vring.num * - sizeof(struct vring_desc_state_split)); + + vq->split.desc_state = vring_split->desc_state; + vq->split.desc_extra = vring_split->desc_extra; virtqueue_init(vq, vring_split->vring.num); @@ -2305,12 +2331,6 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index, list_add_tail(&vq->vq.list, &vdev->vqs); spin_unlock(&vdev->vqs_list_lock); return &vq->vq; - -err_extra: - kfree(vq->split.desc_state); -err_state: - kfree(vq); - return NULL; } struct virtqueue *vring_create_virtqueue(