From patchwork Mon Feb 14 08:14:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12745094 X-Patchwork-Delegate: kuba@kernel.org 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 5E285C4321E for ; Mon, 14 Feb 2022 08:14:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241632AbiBNIOk (ORCPT ); Mon, 14 Feb 2022 03:14:40 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:41908 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241619AbiBNIOi (ORCPT ); Mon, 14 Feb 2022 03:14:38 -0500 Received: from out30-132.freemail.mail.aliyun.com (out30-132.freemail.mail.aliyun.com [115.124.30.132]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D761FC6C; Mon, 14 Feb 2022 00:14:30 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R171e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04400;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=11;SR=0;TI=SMTPD_---0V4NGfRz_1644826466; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V4NGfRz_1644826466) by smtp.aliyun-inc.com(127.0.0.1); Mon, 14 Feb 2022 16:14:26 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org Cc: "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , bpf@vger.kernel.org Subject: [PATCH v5 09/22] virtio: queue_reset: struct virtio_config_ops add callbacks for queue_reset Date: Mon, 14 Feb 2022 16:14:03 +0800 Message-Id: <20220214081416.117695-10-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220214081416.117695-1-xuanzhuo@linux.alibaba.com> References: <20220214081416.117695-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 24fd8391539b Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Performing reset on a queue is divided into four steps: 1. reset_vq: reset one vq 2. recycle the buffer from vq by virtqueue_detach_unused_buf() 3. release the ring of the vq by vring_release_virtqueue() 4. enable_reset_vq: re-enable the reset queue So add two callbacks reset_vq, enable_reset_vq to struct virtio_config_ops. Signed-off-by: Xuan Zhuo --- include/linux/virtio_config.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 4d107ad31149..8cde339d40b4 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -74,6 +74,18 @@ struct virtio_shm_region { * @set_vq_affinity: set the affinity for a virtqueue (optional). * @get_vq_affinity: get the affinity for a virtqueue (optional). * @get_shm_region: get a shared memory region based on the index. + * @reset_vq: reset a queue individually (optional). + * vq: the virtqueue + * Returns 0 on success or error status + * After successfully calling this, be sure to call + * virtqueue_detach_unused_buf() to recycle the buffer in the ring, and + * then call vring_release_virtqueue() to release the vq ring. + * Caller should guarantee that the vring is not accessed by any functions + * of virtqueue. + * @enable_reset_vq: enable a reset queue + * vq: the virtqueue + * Returns 0 on success or error status + * If reset_vq is set, then enable_reset_vq must also be set. */ typedef void vq_callback_t(struct virtqueue *); struct virtio_config_ops { @@ -100,6 +112,8 @@ struct virtio_config_ops { int index); bool (*get_shm_region)(struct virtio_device *vdev, struct virtio_shm_region *region, u8 id); + int (*reset_vq)(struct virtqueue *vq); + int (*enable_reset_vq)(struct virtqueue *vq); }; /* If driver didn't advertise the feature, it will never appear. */