From patchwork Fri Jun 24 02:55:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12893380 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 5B9F7CCA481 for ; Fri, 24 Jun 2022 02:56:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231190AbiFXC4n (ORCPT ); Thu, 23 Jun 2022 22:56:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43534 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230264AbiFXC4f (ORCPT ); Thu, 23 Jun 2022 22:56:35 -0400 Received: from out30-133.freemail.mail.aliyun.com (out30-133.freemail.mail.aliyun.com [115.124.30.133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA08856C0A; Thu, 23 Jun 2022 19:56:32 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R121e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046051;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=37;SR=0;TI=SMTPD_---0VHEuVqg_1656039386; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0VHEuVqg_1656039386) by smtp.aliyun-inc.com; Fri, 24 Jun 2022 10:56:27 +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 02/41] virtio: add helper virtqueue_get_vring_max_size() Date: Fri, 24 Jun 2022 10:55:42 +0800 Message-Id: <20220624025621.128843-3-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: netdev@vger.kernel.org Record the maximum queue num supported by the device. virtio-net can display the maximum (supported by hardware) ring size in ethtool -g eth0. When the subsequent patch implements vring reset, it can judge whether the ring size passed by the driver is legal based on this. Signed-off-by: Xuan Zhuo --- arch/um/drivers/virtio_uml.c | 1 + drivers/platform/mellanox/mlxbf-tmfifo.c | 2 ++ drivers/remoteproc/remoteproc_virtio.c | 2 ++ drivers/s390/virtio/virtio_ccw.c | 3 +++ drivers/virtio/virtio_mmio.c | 2 ++ drivers/virtio/virtio_pci_legacy.c | 2 ++ drivers/virtio/virtio_pci_modern.c | 2 ++ drivers/virtio/virtio_ring.c | 14 ++++++++++++++ drivers/virtio/virtio_vdpa.c | 2 ++ include/linux/virtio.h | 2 ++ 10 files changed, 32 insertions(+) diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c index 82ff3785bf69..e719af8bdf56 100644 --- a/arch/um/drivers/virtio_uml.c +++ b/arch/um/drivers/virtio_uml.c @@ -958,6 +958,7 @@ static struct virtqueue *vu_setup_vq(struct virtio_device *vdev, goto error_create; } vq->priv = info; + vq->num_max = num; num = virtqueue_get_vring_size(vq); if (vu_dev->protocol_features & diff --git a/drivers/platform/mellanox/mlxbf-tmfifo.c b/drivers/platform/mellanox/mlxbf-tmfifo.c index 38800e86ed8a..1ae3c56b66b0 100644 --- a/drivers/platform/mellanox/mlxbf-tmfifo.c +++ b/drivers/platform/mellanox/mlxbf-tmfifo.c @@ -959,6 +959,8 @@ static int mlxbf_tmfifo_virtio_find_vqs(struct virtio_device *vdev, goto error; } + vq->num_max = vring->num; + vqs[i] = vq; vring->vq = vq; vq->priv = vring; diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c index d43d74733f0a..0f7706e23eb9 100644 --- a/drivers/remoteproc/remoteproc_virtio.c +++ b/drivers/remoteproc/remoteproc_virtio.c @@ -125,6 +125,8 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev, return ERR_PTR(-ENOMEM); } + vq->num_max = num; + rvring->vq = vq; vq->priv = rvring; diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c index 97e51c34e6cf..cbcdba00e7e9 100644 --- a/drivers/s390/virtio/virtio_ccw.c +++ b/drivers/s390/virtio/virtio_ccw.c @@ -530,6 +530,9 @@ static struct virtqueue *virtio_ccw_setup_vq(struct virtio_device *vdev, err = -ENOMEM; goto out_err; } + + vq->num_max = info->num; + /* it may have been reduced */ info->num = virtqueue_get_vring_size(vq); diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c index c9bec3813e94..2e7cbbd21043 100644 --- a/drivers/virtio/virtio_mmio.c +++ b/drivers/virtio/virtio_mmio.c @@ -402,6 +402,8 @@ static struct virtqueue *vm_setup_vq(struct virtio_device *vdev, unsigned int in goto error_new_virtqueue; } + vq->num_max = num; + /* Activate the queue */ writel(virtqueue_get_vring_size(vq), vm_dev->base + VIRTIO_MMIO_QUEUE_NUM); if (vm_dev->version == 1) { diff --git a/drivers/virtio/virtio_pci_legacy.c b/drivers/virtio/virtio_pci_legacy.c index a5e5721145c7..2257f1b3d8ae 100644 --- a/drivers/virtio/virtio_pci_legacy.c +++ b/drivers/virtio/virtio_pci_legacy.c @@ -135,6 +135,8 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, if (!vq) return ERR_PTR(-ENOMEM); + vq->num_max = num; + q_pfn = virtqueue_get_desc_addr(vq) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT; if (q_pfn >> 32) { dev_err(&vp_dev->pci_dev->dev, diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index 623906b4996c..e7e0b8c850f6 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -218,6 +218,8 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, if (!vq) return ERR_PTR(-ENOMEM); + vq->num_max = num; + /* activate the queue */ vp_modern_set_queue_size(mdev, index, virtqueue_get_vring_size(vq)); vp_modern_queue_address(mdev, index, virtqueue_get_desc_addr(vq), diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 13a7348cedff..68f55336566c 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2355,6 +2355,20 @@ void vring_transport_features(struct virtio_device *vdev) } EXPORT_SYMBOL_GPL(vring_transport_features); +/** + * virtqueue_get_vring_max_size - return the max size of the virtqueue's vring + * @_vq: the struct virtqueue containing the vring of interest. + * + * Returns the max size of the vring. + * + * Unlike other operations, this need not be serialized. + */ +unsigned int virtqueue_get_vring_max_size(struct virtqueue *_vq) +{ + return _vq->num_max; +} +EXPORT_SYMBOL_GPL(virtqueue_get_vring_max_size); + /** * virtqueue_get_vring_size - return the size of the virtqueue's vring * @_vq: the struct virtqueue containing the vring of interest. diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index c40f7deb6b5a..9670cc79371d 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -183,6 +183,8 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index, goto error_new_virtqueue; } + vq->num_max = max_num; + /* Setup virtqueue callback */ cb.callback = callback ? virtio_vdpa_virtqueue_cb : NULL; cb.private = info; diff --git a/include/linux/virtio.h b/include/linux/virtio.h index d8fdf170637c..a82620032e43 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -31,6 +31,7 @@ struct virtqueue { struct virtio_device *vdev; unsigned int index; unsigned int num_free; + unsigned int num_max; void *priv; }; @@ -80,6 +81,7 @@ bool virtqueue_enable_cb_delayed(struct virtqueue *vq); void *virtqueue_detach_unused_buf(struct virtqueue *vq); +unsigned int virtqueue_get_vring_max_size(struct virtqueue *vq); unsigned int virtqueue_get_vring_size(struct virtqueue *vq); bool virtqueue_is_broken(struct virtqueue *vq);