From patchwork Wed Apr 6 03:43:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803438 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 573A0C43219 for ; Wed, 6 Apr 2022 13:31:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233538AbiDFNdQ (ORCPT ); Wed, 6 Apr 2022 09:33:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42810 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234014AbiDFNdC (ORCPT ); Wed, 6 Apr 2022 09:33:02 -0400 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 C3B9A2128C9; Tue, 5 Apr 2022 20:43:55 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R181e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e01424;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9KCOAc_1649216628; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9KCOAc_1649216628) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:43:49 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 01/32] virtio: add helper virtqueue_get_vring_max_size() Date: Wed, 6 Apr 2022 11:43:15 +0800 Message-Id: <20220406034346.74409-2-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@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 ba562d68dc04..904993d15a85 100644 --- a/arch/um/drivers/virtio_uml.c +++ b/arch/um/drivers/virtio_uml.c @@ -945,6 +945,7 @@ 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 70ab496d0431..7611755d0ae2 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 = len; + rvring->vq = vq; vq->priv = rvring; diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c index d35e7a3f7067..468da60b56c5 100644 --- a/drivers/s390/virtio/virtio_ccw.c +++ b/drivers/s390/virtio/virtio_ccw.c @@ -529,6 +529,9 @@ 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 56128b9c46eb..a41abc8051b9 100644 --- a/drivers/virtio/virtio_mmio.c +++ b/drivers/virtio/virtio_mmio.c @@ -390,6 +390,8 @@ static struct virtqueue *vm_setup_vq(struct virtio_device *vdev, unsigned index, 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 34141b9abe27..b68934fe6b5d 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 5455bc041fb6..86d301f272b8 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 962f1477b1fa..b87130c8f312 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2371,6 +2371,20 @@ 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 7767a7f0119b..39e4c08eb0f2 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 = virtio_vdpa_virtqueue_cb; cb.private = info; diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 72292a62cd90..d59adc4be068 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); From patchwork Wed Apr 6 03:43:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803439 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 0128DC433EF for ; Wed, 6 Apr 2022 13:31:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233242AbiDFNds (ORCPT ); Wed, 6 Apr 2022 09:33:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232432AbiDFNdF (ORCPT ); Wed, 6 Apr 2022 09:33:05 -0400 Received: from out30-54.freemail.mail.aliyun.com (out30-54.freemail.mail.aliyun.com [115.124.30.54]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C78732128CD; Tue, 5 Apr 2022 20:43:57 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R141e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e01424;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JzijI_1649216630; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JzijI_1649216630) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:43:52 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 02/32] virtio: struct virtio_config_ops add callbacks for queue_reset Date: Wed, 6 Apr 2022 11:43:16 +0800 Message-Id: <20220406034346.74409-3-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Performing reset on a queue is divided into four steps: 1. transport: notify the device to reset the queue 2. vring: recycle the buffer submitted 3. vring: reset/resize the vring (may re-alloc) 4. transport: mmap vring to device, and enable the queue In order to support queue reset, add two callbacks(reset_vq, enable_reset_vq) in struct virtio_config_ops to implement steps 1 and 4. Signed-off-by: Xuan Zhuo --- include/linux/virtio_config.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 4d107ad31149..d4adcd0e1c57 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -74,6 +74,16 @@ 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 + * reset_vq will guarantee that the callbacks are disabled and synchronized. + * Except for the callback, the 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 +110,8 @@ 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. */ From patchwork Wed Apr 6 03:43:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803743 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 A5198C43217 for ; Wed, 6 Apr 2022 16:11:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237175AbiDFQN2 (ORCPT ); Wed, 6 Apr 2022 12:13:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237676AbiDFQMg (ORCPT ); Wed, 6 Apr 2022 12:12:36 -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 20DCD231905; Tue, 5 Apr 2022 20:43:59 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04423;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9Jzik2_1649216632; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9Jzik2_1649216632) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:43:54 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 03/32] virtio_ring: update the document of the virtqueue_detach_unused_buf for queue reset Date: Wed, 6 Apr 2022 11:43:17 +0800 Message-Id: <20220406034346.74409-4-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Added documentation for virtqueue_detach_unused_buf, allowing it to be called on queue reset. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/virtio/virtio_ring.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index b87130c8f312..f1807f6b06a5 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2127,8 +2127,8 @@ EXPORT_SYMBOL_GPL(virtqueue_enable_cb_delayed); * @_vq: the struct virtqueue we're talking about. * * Returns NULL or the "data" token handed to virtqueue_add_*(). - * This is not valid on an active queue; it is useful only for device - * shutdown. + * This is not valid on an active queue; it is useful for device + * shutdown or the reset queue. */ void *virtqueue_detach_unused_buf(struct virtqueue *_vq) { From patchwork Wed Apr 6 03:43:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803121 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 2AAC4C433EF for ; Wed, 6 Apr 2022 10:18:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348386AbiDFKUq (ORCPT ); Wed, 6 Apr 2022 06:20:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377512AbiDFKSm (ORCPT ); Wed, 6 Apr 2022 06:18:42 -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 930F023190E; Tue, 5 Apr 2022 20:44:01 -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=e01e01424;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JmraU_1649216635; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JmraU_1649216635) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:43:56 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 04/32] virtio_ring: remove the arg vq of vring_alloc_desc_extra() Date: Wed, 6 Apr 2022 11:43:18 +0800 Message-Id: <20220406034346.74409-5-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org The parameter vq of vring_alloc_desc_extra() is useless. This patch removes this parameter. Subsequent patches will call this function to avoid passing useless arguments. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/virtio/virtio_ring.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index f1807f6b06a5..cb6010750a94 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1636,8 +1636,7 @@ static void *virtqueue_detach_unused_buf_packed(struct virtqueue *_vq) return NULL; } -static struct vring_desc_extra *vring_alloc_desc_extra(struct vring_virtqueue *vq, - unsigned int num) +static struct vring_desc_extra *vring_alloc_desc_extra(unsigned int num) { struct vring_desc_extra *desc_extra; unsigned int i; @@ -1755,7 +1754,7 @@ static struct virtqueue *vring_create_virtqueue_packed( /* Put everything in free lists. */ vq->free_head = 0; - vq->packed.desc_extra = vring_alloc_desc_extra(vq, num); + vq->packed.desc_extra = vring_alloc_desc_extra(num); if (!vq->packed.desc_extra) goto err_desc_extra; @@ -2233,7 +2232,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, if (!vq->split.desc_state) goto err_state; - vq->split.desc_extra = vring_alloc_desc_extra(vq, vring.num); + vq->split.desc_extra = vring_alloc_desc_extra(vring.num); if (!vq->split.desc_extra) goto err_extra; From patchwork Wed Apr 6 03:43:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803437 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 478B3C433F5 for ; Wed, 6 Apr 2022 13:31:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233594AbiDFNdR (ORCPT ); Wed, 6 Apr 2022 09:33:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234017AbiDFNdC (ORCPT ); Wed, 6 Apr 2022 09:33:02 -0400 Received: from out30-43.freemail.mail.aliyun.com (out30-43.freemail.mail.aliyun.com [115.124.30.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C7C1B23C0EE; Tue, 5 Apr 2022 20:44:03 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R201e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04394;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9Jmrau_1649216637; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9Jmrau_1649216637) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:43:58 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 05/32] virtio_ring: extract the logic of freeing vring Date: Wed, 6 Apr 2022 11:43:19 +0800 Message-Id: <20220406034346.74409-6-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Introduce vring_free() to free the vring of vq. Subsequent patches will use vring_free() alone. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/virtio/virtio_ring.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index cb6010750a94..33fddfb907a6 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2301,14 +2301,10 @@ struct virtqueue *vring_new_virtqueue(unsigned int index, } EXPORT_SYMBOL_GPL(vring_new_virtqueue); -void vring_del_virtqueue(struct virtqueue *_vq) +static void vring_free(struct virtqueue *_vq) { struct vring_virtqueue *vq = to_vvq(_vq); - spin_lock(&vq->vq.vdev->vqs_list_lock); - list_del(&_vq->list); - spin_unlock(&vq->vq.vdev->vqs_list_lock); - if (vq->we_own_ring) { if (vq->packed_ring) { vring_free_queue(vq->vq.vdev, @@ -2339,6 +2335,18 @@ void vring_del_virtqueue(struct virtqueue *_vq) kfree(vq->split.desc_state); kfree(vq->split.desc_extra); } +} + +void vring_del_virtqueue(struct virtqueue *_vq) +{ + struct vring_virtqueue *vq = to_vvq(_vq); + + spin_lock(&vq->vq.vdev->vqs_list_lock); + list_del(&_vq->list); + spin_unlock(&vq->vq.vdev->vqs_list_lock); + + vring_free(_vq); + kfree(vq); } EXPORT_SYMBOL_GPL(vring_del_virtqueue); From patchwork Wed Apr 6 03:43:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803489 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 06E40C4167B for ; Wed, 6 Apr 2022 13:59:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234026AbiDFOB4 (ORCPT ); Wed, 6 Apr 2022 10:01:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47908 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233995AbiDFOB2 (ORCPT ); Wed, 6 Apr 2022 10:01:28 -0400 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 DF79623DEB7; Tue, 5 Apr 2022 20:44:06 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R261e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04423;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9K2X4R_1649216639; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9K2X4R_1649216639) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:00 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 06/32] virtio_ring: split: extract the logic of alloc queue Date: Wed, 6 Apr 2022 11:43:20 +0800 Message-Id: <20220406034346.74409-7-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Separate the logic of split to create vring queue. This feature is required for subsequent virtuqueue reset vring. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 53 ++++++++++++++++++++++++------------ 1 file changed, 36 insertions(+), 17 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 33fddfb907a6..72d5ae063fa0 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -915,23 +915,15 @@ static void *virtqueue_detach_unused_buf_split(struct virtqueue *_vq) return NULL; } -static struct virtqueue *vring_create_virtqueue_split( - unsigned int index, - unsigned int num, - unsigned int vring_align, - struct virtio_device *vdev, - bool weak_barriers, - bool may_reduce_num, - bool context, - bool (*notify)(struct virtqueue *), - void (*callback)(struct virtqueue *), - const char *name) +static void *vring_alloc_queue_split(struct virtio_device *vdev, + dma_addr_t *dma_addr, + u32 *n, + unsigned int vring_align, + bool weak_barriers, + bool may_reduce_num) { - struct virtqueue *vq; void *queue = NULL; - dma_addr_t dma_addr; - size_t queue_size_in_bytes; - struct vring vring; + u32 num = *n; /* We assume num is a power of 2. */ if (num & (num - 1)) { @@ -942,7 +934,7 @@ static struct virtqueue *vring_create_virtqueue_split( /* TODO: allocate each queue chunk individually */ for (; num && vring_size(num, vring_align) > PAGE_SIZE; num /= 2) { queue = vring_alloc_queue(vdev, vring_size(num, vring_align), - &dma_addr, + dma_addr, GFP_KERNEL|__GFP_NOWARN|__GFP_ZERO); if (queue) break; @@ -956,11 +948,38 @@ static struct virtqueue *vring_create_virtqueue_split( if (!queue) { /* Try to get a single page. You are my only hope! */ queue = vring_alloc_queue(vdev, vring_size(num, vring_align), - &dma_addr, GFP_KERNEL|__GFP_ZERO); + dma_addr, GFP_KERNEL|__GFP_ZERO); } if (!queue) return NULL; + *n = num; + return queue; +} + +static struct virtqueue *vring_create_virtqueue_split( + unsigned int index, + unsigned int num, + unsigned int vring_align, + struct virtio_device *vdev, + bool weak_barriers, + bool may_reduce_num, + bool context, + bool (*notify)(struct virtqueue *), + void (*callback)(struct virtqueue *), + const char *name) +{ + size_t queue_size_in_bytes; + struct virtqueue *vq; + dma_addr_t dma_addr; + struct vring vring; + void *queue; + + queue = vring_alloc_queue_split(vdev, &dma_addr, &num, vring_align, + weak_barriers, may_reduce_num); + if (!queue) + return NULL; + queue_size_in_bytes = vring_size(num, vring_align); vring_init(&vring, num, queue, vring_align); From patchwork Wed Apr 6 03:43:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803742 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 EE44BC43217 for ; Wed, 6 Apr 2022 16:11:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237017AbiDFQNZ (ORCPT ); Wed, 6 Apr 2022 12:13:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59368 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237673AbiDFQMf (ORCPT ); Wed, 6 Apr 2022 12:12:35 -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 39E8724BD75; Tue, 5 Apr 2022 20:44:10 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R321e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04357;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JzimG_1649216641; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JzimG_1649216641) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:03 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 07/32] virtio_ring: split: extract the logic of alloc state and extra Date: Wed, 6 Apr 2022 11:43:21 +0800 Message-Id: <20220406034346.74409-8-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 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 --- drivers/virtio/virtio_ring.c | 53 ++++++++++++++++++++++++++---------- 1 file changed, 38 insertions(+), 15 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 72d5ae063fa0..6de67439cb57 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -198,6 +198,7 @@ struct vring_virtqueue { #endif }; +static struct vring_desc_extra *vring_alloc_desc_extra(unsigned int num); /* * Helpers. @@ -915,6 +916,33 @@ static void *virtqueue_detach_unused_buf_split(struct virtqueue *_vq) return NULL; } +static int vring_alloc_state_extra_split(u32 num, + struct vring_desc_state_split **desc_state, + struct vring_desc_extra **desc_extra) +{ + struct vring_desc_state_split *state; + struct vring_desc_extra *extra; + + 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)); + + *desc_state = state; + *desc_extra = extra; + return 0; + +err_extra: + kfree(state); +err_state: + return -ENOMEM; +} + static void *vring_alloc_queue_split(struct virtio_device *vdev, dma_addr_t *dma_addr, u32 *n, @@ -2196,7 +2224,10 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, void (*callback)(struct virtqueue *), const char *name) { + struct vring_desc_state_split *state; + struct vring_desc_extra *extra; struct vring_virtqueue *vq; + int err; if (virtio_has_feature(vdev, VIRTIO_F_RING_PACKED)) return NULL; @@ -2246,30 +2277,22 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, vq->split.avail_flags_shadow); } - vq->split.desc_state = kmalloc_array(vring.num, - sizeof(struct vring_desc_state_split), GFP_KERNEL); - if (!vq->split.desc_state) - goto err_state; + err = vring_alloc_state_extra_split(vring.num, &state, &extra); + if (err) { + kfree(vq); + return NULL; + } - vq->split.desc_extra = vring_alloc_desc_extra(vring.num); - if (!vq->split.desc_extra) - goto err_extra; + vq->split.desc_state = state; + vq->split.desc_extra = extra; /* Put everything in free lists. */ vq->free_head = 0; - memset(vq->split.desc_state, 0, vring.num * - sizeof(struct vring_desc_state_split)); spin_lock(&vdev->vqs_list_lock); 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; } EXPORT_SYMBOL_GPL(__vring_new_virtqueue); From patchwork Wed Apr 6 03:43:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803744 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 2E924C433FE for ; Wed, 6 Apr 2022 16:11:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237227AbiDFQNd (ORCPT ); Wed, 6 Apr 2022 12:13:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237680AbiDFQMg (ORCPT ); Wed, 6 Apr 2022 12:12:36 -0400 Received: from out30-54.freemail.mail.aliyun.com (out30-54.freemail.mail.aliyun.com [115.124.30.54]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 39D9424BD73; Tue, 5 Apr 2022 20:44:10 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R181e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e01424;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JmrcR_1649216644; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JmrcR_1649216644) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:05 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 08/32] virtio_ring: split: extract the logic of attach vring Date: Wed, 6 Apr 2022 11:43:22 +0800 Message-Id: <20220406034346.74409-9-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Separate the logic of attach vring, subsequent patches will call it separately. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 6de67439cb57..083f2992ba0d 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -916,6 +916,19 @@ static void *virtqueue_detach_unused_buf_split(struct virtqueue *_vq) return NULL; } +static void vring_virtqueue_attach_split(struct vring_virtqueue *vq, + struct vring vring, + struct vring_desc_state_split *desc_state, + struct vring_desc_extra *desc_extra) +{ + vq->split.vring = vring; + vq->split.queue_dma_addr = 0; + vq->split.queue_size_in_bytes = 0; + + vq->split.desc_state = desc_state; + vq->split.desc_extra = desc_extra; +} + static int vring_alloc_state_extra_split(u32 num, struct vring_desc_state_split **desc_state, struct vring_desc_extra **desc_extra) @@ -2262,10 +2275,6 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, 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; - - vq->split.vring = vring; vq->split.avail_flags_shadow = 0; vq->split.avail_idx_shadow = 0; @@ -2283,8 +2292,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, return NULL; } - vq->split.desc_state = state; - vq->split.desc_extra = extra; + vring_virtqueue_attach_split(vq, vring, state, extra); /* Put everything in free lists. */ vq->free_head = 0; From patchwork Wed Apr 6 03:43:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803086 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 45FB5C4332F for ; Wed, 6 Apr 2022 10:17:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376463AbiDFKTi (ORCPT ); Wed, 6 Apr 2022 06:19:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36330 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376905AbiDFKSe (ORCPT ); Wed, 6 Apr 2022 06:18:34 -0400 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 989BA264558; Tue, 5 Apr 2022 20:44:15 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R191e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04407;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JnaOQ_1649216646; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JnaOQ_1649216646) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:07 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 09/32] virtio_ring: split: extract the logic of vq init Date: Wed, 6 Apr 2022 11:43:23 +0800 Message-Id: <20220406034346.74409-10-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Separate the logic of initializing vq, and subsequent patches will call it separately. The feature of this part is that it does not depend on the information passed by the upper layer and can be called repeatedly. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 68 ++++++++++++++++++++---------------- 1 file changed, 38 insertions(+), 30 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 083f2992ba0d..874f878087a3 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -916,6 +916,43 @@ static void *virtqueue_detach_unused_buf_split(struct virtqueue *_vq) return NULL; } +static void vring_virtqueue_init_split(struct vring_virtqueue *vq, + struct virtio_device *vdev, + bool own_ring) +{ + vq->packed_ring = false; + vq->vq.num_free = vq->split.vring.num; + vq->we_own_ring = own_ring; + vq->broken = false; + 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; + + vq->split.avail_flags_shadow = 0; + vq->split.avail_idx_shadow = 0; + + /* No callback? Tell other side not to bother us. */ + if (!vq->vq.callback) { + vq->split.avail_flags_shadow |= VRING_AVAIL_F_NO_INTERRUPT; + if (!vq->event) + vq->split.vring.avail->flags = cpu_to_virtio16(vdev, + vq->split.avail_flags_shadow); + } + + /* Put everything in free lists. */ + vq->free_head = 0; +} + static void vring_virtqueue_attach_split(struct vring_virtqueue *vq, struct vring vring, struct vring_desc_state_split *desc_state, @@ -2249,42 +2286,15 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, if (!vq) return NULL; - vq->packed_ring = false; 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 = false; - 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.avail_flags_shadow = 0; - vq->split.avail_idx_shadow = 0; - - /* No callback? Tell other side not to bother us. */ - if (!callback) { - vq->split.avail_flags_shadow |= VRING_AVAIL_F_NO_INTERRUPT; - if (!vq->event) - vq->split.vring.avail->flags = cpu_to_virtio16(vdev, - vq->split.avail_flags_shadow); - } err = vring_alloc_state_extra_split(vring.num, &state, &extra); if (err) { @@ -2293,9 +2303,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, } vring_virtqueue_attach_split(vq, vring, state, extra); - - /* Put everything in free lists. */ - vq->free_head = 0; + vring_virtqueue_init_split(vq, vdev, false); spin_lock(&vdev->vqs_list_lock); list_add_tail(&vq->vq.list, &vdev->vqs); From patchwork Wed Apr 6 03:43:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803488 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 BFFDAC433FE for ; Wed, 6 Apr 2022 13:59:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234037AbiDFOBx (ORCPT ); Wed, 6 Apr 2022 10:01:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234026AbiDFOB2 (ORCPT ); Wed, 6 Apr 2022 10:01:28 -0400 Received: from out30-57.freemail.mail.aliyun.com (out30-57.freemail.mail.aliyun.com [115.124.30.57]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5D18262D74; Tue, 5 Apr 2022 20:44:14 -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=e01e04423;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9K2X73_1649216648; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9K2X73_1649216648) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:09 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 10/32] virtio_ring: split: introduce virtqueue_reinit_split() Date: Wed, 6 Apr 2022 11:43:24 +0800 Message-Id: <20220406034346.74409-11-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Introduce a function to initialize vq without allocating new ring, desc_state, desc_extra. Subsequent patches will call this function after reset vq to reinitialize vq. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/virtio/virtio_ring.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 874f878087a3..3dc6ace2ba7a 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -953,6 +953,25 @@ static void vring_virtqueue_init_split(struct vring_virtqueue *vq, vq->free_head = 0; } +static void virtqueue_reinit_split(struct vring_virtqueue *vq) +{ + struct virtio_device *vdev = vq->vq.vdev; + int size, i; + + memset(vq->split.vring.desc, 0, vq->split.queue_size_in_bytes); + + size = sizeof(struct vring_desc_state_split) * vq->split.vring.num; + memset(vq->split.desc_state, 0, size); + + size = sizeof(struct vring_desc_extra) * vq->split.vring.num; + memset(vq->split.desc_extra, 0, size); + + for (i = 0; i < vq->split.vring.num - 1; i++) + vq->split.desc_extra[i].next = i + 1; + + vring_virtqueue_init_split(vq, vdev, true); +} + static void vring_virtqueue_attach_split(struct vring_virtqueue *vq, struct vring vring, struct vring_desc_state_split *desc_state, From patchwork Wed Apr 6 03:43:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803745 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 B9C11C4332F for ; Wed, 6 Apr 2022 16:11:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237201AbiDFQNf (ORCPT ); Wed, 6 Apr 2022 12:13:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60138 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237707AbiDFQMh (ORCPT ); Wed, 6 Apr 2022 12:12:37 -0400 Received: from out199-3.us.a.mail.aliyun.com (out199-3.us.a.mail.aliyun.com [47.90.199.3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B92F264830; Tue, 5 Apr 2022 20:44:18 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R111e4;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=34;SR=0;TI=SMTPD_---0V9Jziol_1649216650; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9Jziol_1649216650) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:11 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 11/32] virtio_ring: split: introduce virtqueue_resize_split() Date: Wed, 6 Apr 2022 11:43:25 +0800 Message-Id: <20220406034346.74409-12-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org virtio ring split supports resize. Only after the new vring is successfully allocated based on the new num, we will release the old vring. In any case, an error is returned, indicating that the vring still points to the old vring. In the case of an error, the caller must re-initialize(virtqueue_reinit_split()) the virtqueue to ensure that the vring can be used. In addition, vring_align, may_reduce_num are necessary for reallocating vring, so they are retained for creating vq. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 47 ++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 3dc6ace2ba7a..33864134a744 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -139,6 +139,12 @@ struct vring_virtqueue { /* DMA address and size information */ dma_addr_t queue_dma_addr; size_t queue_size_in_bytes; + + /* The parameters for creating vrings are reserved for + * creating new vring. + */ + u32 vring_align; + bool may_reduce_num; } split; /* Available for packed ring */ @@ -199,6 +205,7 @@ struct vring_virtqueue { }; static struct vring_desc_extra *vring_alloc_desc_extra(unsigned int num); +static void vring_free(struct virtqueue *_vq); /* * Helpers. @@ -1088,6 +1095,8 @@ static struct virtqueue *vring_create_virtqueue_split( return NULL; } + to_vvq(vq)->split.vring_align = vring_align; + to_vvq(vq)->split.may_reduce_num = may_reduce_num; to_vvq(vq)->split.queue_dma_addr = dma_addr; to_vvq(vq)->split.queue_size_in_bytes = queue_size_in_bytes; to_vvq(vq)->we_own_ring = true; @@ -1095,6 +1104,44 @@ static struct virtqueue *vring_create_virtqueue_split( return vq; } +static int virtqueue_resize_split(struct virtqueue *_vq, u32 num) +{ + struct vring_virtqueue *vq = to_vvq(_vq); + struct virtio_device *vdev = _vq->vdev; + struct vring_desc_state_split *state; + struct vring_desc_extra *extra; + size_t queue_size_in_bytes; + dma_addr_t dma_addr; + struct vring vring; + int err = -ENOMEM; + void *queue; + + queue = vring_alloc_queue_split(vdev, &dma_addr, &num, + vq->split.vring_align, + vq->weak_barriers, + vq->split.may_reduce_num); + if (!queue) + return -ENOMEM; + + queue_size_in_bytes = vring_size(num, vq->split.vring_align); + + err = vring_alloc_state_extra_split(num, &state, &extra); + if (err) { + vring_free_queue(vdev, queue_size_in_bytes, queue, dma_addr); + return -ENOMEM; + } + + vring_free(&vq->vq); + + vring_init(&vring, num, queue, vq->split.vring_align); + vring_virtqueue_attach_split(vq, vring, state, extra); + vq->split.queue_dma_addr = dma_addr; + vq->split.queue_size_in_bytes = queue_size_in_bytes; + + vring_virtqueue_init_split(vq, vdev, true); + return 0; +} + /* * Packed ring specific functions - *_packed(). From patchwork Wed Apr 6 03:43:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803087 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 D7837C4321E for ; Wed, 6 Apr 2022 10:17:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378342AbiDFKTr (ORCPT ); Wed, 6 Apr 2022 06:19:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36748 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376940AbiDFKSe (ORCPT ); Wed, 6 Apr 2022 06:18:34 -0400 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 97A2A2662C5; Tue, 5 Apr 2022 20:44:19 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R181e4;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=34;SR=0;TI=SMTPD_---0V9K8DYd_1649216652; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9K8DYd_1649216652) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:14 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 12/32] virtio_ring: packed: extract the logic of alloc queue Date: Wed, 6 Apr 2022 11:43:26 +0800 Message-Id: <20220406034346.74409-13-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Separate the logic of packed to create vring queue. For the convenience of passing parameters, add a structure vring_packed. This feature is required for subsequent virtuqueue reset vring. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 70 ++++++++++++++++++++++++++++-------- 1 file changed, 56 insertions(+), 14 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 33864134a744..ea451ae2aaef 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1817,19 +1817,17 @@ static struct vring_desc_extra *vring_alloc_desc_extra(unsigned int num) return desc_extra; } -static struct virtqueue *vring_create_virtqueue_packed( - unsigned int index, - unsigned int num, - unsigned int vring_align, - struct virtio_device *vdev, - bool weak_barriers, - bool may_reduce_num, - bool context, - bool (*notify)(struct virtqueue *), - void (*callback)(struct virtqueue *), - const char *name) +static int vring_alloc_queue_packed(struct virtio_device *vdev, + u32 num, + struct vring_packed_desc **_ring, + struct vring_packed_desc_event **_driver, + struct vring_packed_desc_event **_device, + dma_addr_t *_ring_dma_addr, + dma_addr_t *_driver_event_dma_addr, + dma_addr_t *_device_event_dma_addr, + size_t *_ring_size_in_bytes, + size_t *_event_size_in_bytes) { - struct vring_virtqueue *vq; struct vring_packed_desc *ring; struct vring_packed_desc_event *driver, *device; dma_addr_t ring_dma_addr, driver_event_dma_addr, device_event_dma_addr; @@ -1857,6 +1855,52 @@ static struct virtqueue *vring_create_virtqueue_packed( if (!device) goto err_device; + *_ring = ring; + *_driver = driver; + *_device = device; + *_ring_dma_addr = ring_dma_addr; + *_driver_event_dma_addr = driver_event_dma_addr; + *_device_event_dma_addr = device_event_dma_addr; + *_ring_size_in_bytes = ring_size_in_bytes; + *_event_size_in_bytes = event_size_in_bytes; + + return 0; + +err_device: + vring_free_queue(vdev, event_size_in_bytes, driver, driver_event_dma_addr); + +err_driver: + vring_free_queue(vdev, ring_size_in_bytes, ring, ring_dma_addr); + +err_ring: + return -ENOMEM; +} + +static struct virtqueue *vring_create_virtqueue_packed( + unsigned int index, + unsigned int num, + unsigned int vring_align, + struct virtio_device *vdev, + bool weak_barriers, + bool may_reduce_num, + bool context, + bool (*notify)(struct virtqueue *), + void (*callback)(struct virtqueue *), + const char *name) +{ + dma_addr_t ring_dma_addr, driver_event_dma_addr, device_event_dma_addr; + struct vring_packed_desc_event *driver, *device; + size_t ring_size_in_bytes, event_size_in_bytes; + struct vring_packed_desc *ring; + struct vring_virtqueue *vq; + + if (vring_alloc_queue_packed(vdev, num, &ring, &driver, &device, + &ring_dma_addr, &driver_event_dma_addr, + &device_event_dma_addr, + &ring_size_in_bytes, + &event_size_in_bytes)) + goto err_ring; + vq = kmalloc(sizeof(*vq), GFP_KERNEL); if (!vq) goto err_vq; @@ -1939,9 +1983,7 @@ static struct virtqueue *vring_create_virtqueue_packed( kfree(vq); err_vq: vring_free_queue(vdev, event_size_in_bytes, device, device_event_dma_addr); -err_device: vring_free_queue(vdev, event_size_in_bytes, driver, driver_event_dma_addr); -err_driver: vring_free_queue(vdev, ring_size_in_bytes, ring, ring_dma_addr); err_ring: return NULL; From patchwork Wed Apr 6 03:43:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803541 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 15A08C433F5 for ; Wed, 6 Apr 2022 14:22:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234579AbiDFOYp (ORCPT ); Wed, 6 Apr 2022 10:24:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234843AbiDFOYL (ORCPT ); Wed, 6 Apr 2022 10:24:11 -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 EA5E6267AC6; Tue, 5 Apr 2022 20:44:21 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R651e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04426;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JmreT_1649216654; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JmreT_1649216654) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:16 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 13/32] virtio_ring: packed: extract the logic of alloc state and extra Date: Wed, 6 Apr 2022 11:43:27 +0800 Message-Id: <20220406034346.74409-14-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 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 | 51 ++++++++++++++++++++++++++---------- 1 file changed, 37 insertions(+), 14 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index ea451ae2aaef..5b5976c5742e 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1876,6 +1876,34 @@ static int vring_alloc_queue_packed(struct virtio_device *vdev, return -ENOMEM; } +static int vring_alloc_state_extra_packed(u32 num, + struct vring_desc_state_packed **desc_state, + struct vring_desc_extra **desc_extra) +{ + struct vring_desc_state_packed *state; + struct vring_desc_extra *extra; + + 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; + + *desc_state = state; + *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, @@ -1891,8 +1919,11 @@ static struct virtqueue *vring_create_virtqueue_packed( dma_addr_t ring_dma_addr, driver_event_dma_addr, device_event_dma_addr; struct vring_packed_desc_event *driver, *device; size_t ring_size_in_bytes, event_size_in_bytes; + struct vring_desc_state_packed *state; + struct vring_desc_extra *extra; struct vring_packed_desc *ring; struct vring_virtqueue *vq; + int err; if (vring_alloc_queue_packed(vdev, num, &ring, &driver, &device, &ring_dma_addr, &driver_event_dma_addr, @@ -1949,22 +1980,16 @@ 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(num, &state, &extra); + if (err) + goto err_state_extra; - memset(vq->packed.desc_state, 0, - num * sizeof(struct vring_desc_state_packed)); + vq->packed.desc_state = state; + vq->packed.desc_extra = extra; /* Put everything in free lists. */ vq->free_head = 0; - 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; @@ -1977,9 +2002,7 @@ 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_queue(vdev, event_size_in_bytes, device, device_event_dma_addr); From patchwork Wed Apr 6 03:43:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803309 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 2C340C433F5 for ; Wed, 6 Apr 2022 12:16:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232749AbiDFMSj (ORCPT ); Wed, 6 Apr 2022 08:18:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40180 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232990AbiDFMSB (ORCPT ); Wed, 6 Apr 2022 08:18:01 -0400 Received: from out30-54.freemail.mail.aliyun.com (out30-54.freemail.mail.aliyun.com [115.124.30.54]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3FFC201B9; Tue, 5 Apr 2022 20:44:23 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R941e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04423;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9Jmrek_1649216657; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9Jmrek_1649216657) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:18 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 14/32] virtio_ring: packed: extract the logic of attach vring Date: Wed, 6 Apr 2022 11:43:28 +0800 Message-Id: <20220406034346.74409-15-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Separate the logic of attach vring, the subsequent patch will call it separately. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 47 +++++++++++++++++++++++++----------- 1 file changed, 33 insertions(+), 14 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 5b5976c5742e..80d446fa8d16 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1904,6 +1904,35 @@ static int vring_alloc_state_extra_packed(u32 num, return -ENOMEM; } +static void vring_virtqueue_attach_packed(struct vring_virtqueue *vq, + u32 num, + struct vring_packed_desc *ring, + struct vring_packed_desc_event *driver, + struct vring_packed_desc_event *device, + dma_addr_t ring_dma_addr, + dma_addr_t driver_event_dma_addr, + dma_addr_t device_event_dma_addr, + size_t ring_size_in_bytes, + size_t event_size_in_bytes, + struct vring_desc_state_packed *state, + struct vring_desc_extra *extra) +{ + vq->packed.ring_dma_addr = ring_dma_addr; + vq->packed.driver_event_dma_addr = driver_event_dma_addr; + vq->packed.device_event_dma_addr = device_event_dma_addr; + + vq->packed.ring_size_in_bytes = ring_size_in_bytes; + vq->packed.event_size_in_bytes = event_size_in_bytes; + + vq->packed.vring.num = num; + vq->packed.vring.desc = ring; + vq->packed.vring.driver = driver; + vq->packed.vring.device = device; + + vq->packed.desc_state = state; + vq->packed.desc_extra = extra; +} + static struct virtqueue *vring_create_virtqueue_packed( unsigned int index, unsigned int num, @@ -1962,18 +1991,6 @@ static struct virtqueue *vring_create_virtqueue_packed( 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; - vq->packed.device_event_dma_addr = device_event_dma_addr; - - vq->packed.ring_size_in_bytes = ring_size_in_bytes; - vq->packed.event_size_in_bytes = event_size_in_bytes; - - vq->packed.vring.num = num; - vq->packed.vring.desc = ring; - vq->packed.vring.driver = driver; - vq->packed.vring.device = device; - vq->packed.next_avail_idx = 0; vq->packed.avail_wrap_counter = 1; vq->packed.used_wrap_counter = 1; @@ -1984,8 +2001,10 @@ static struct virtqueue *vring_create_virtqueue_packed( if (err) goto err_state_extra; - vq->packed.desc_state = state; - vq->packed.desc_extra = extra; + vring_virtqueue_attach_packed(vq, num, ring, driver, device, + ring_dma_addr, driver_event_dma_addr, + device_event_dma_addr, ring_size_in_bytes, + event_size_in_bytes, state, extra); /* Put everything in free lists. */ vq->free_head = 0; From patchwork Wed Apr 6 03:43:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803407 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 5AFAAC433FE for ; Wed, 6 Apr 2022 13:13:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232799AbiDFNPC (ORCPT ); Wed, 6 Apr 2022 09:15:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45892 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233013AbiDFNNz (ORCPT ); Wed, 6 Apr 2022 09:13:55 -0400 Received: from out30-44.freemail.mail.aliyun.com (out30-44.freemail.mail.aliyun.com [115.124.30.44]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BCEC9205CB; Tue, 5 Apr 2022 20:44:25 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R321e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04426;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JnaQg_1649216659; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JnaQg_1649216659) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:20 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 15/32] virtio_ring: packed: extract the logic of vq init Date: Wed, 6 Apr 2022 11:43:29 +0800 Message-Id: <20220406034346.74409-16-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Separate the logic of initializing vq, and subsequent patches will call it separately. The characteristic of this part of the logic is that it does not depend on the information passed by the upper layer, and can be called repeatedly. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 71 ++++++++++++++++++++---------------- 1 file changed, 39 insertions(+), 32 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 80d446fa8d16..c783eb272468 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1933,6 +1933,44 @@ static void vring_virtqueue_attach_packed(struct vring_virtqueue *vq, vq->packed.desc_extra = extra; } +static void vring_virtqueue_init_packed(struct vring_virtqueue *vq, + struct virtio_device *vdev) +{ + vq->vq.num_free = vq->packed.vring.num; + vq->we_own_ring = true; + vq->broken = false; + 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->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.next_avail_idx = 0; + vq->packed.avail_wrap_counter = 1; + vq->packed.used_wrap_counter = 1; + vq->packed.event_flags_shadow = 0; + vq->packed.avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL; + + /* Put everything in free lists. */ + vq->free_head = 0; + + /* No callback? Tell other side not to bother us. */ + if (!vq->vq.callback) { + vq->packed.event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE; + vq->packed.vring.driver->flags = + cpu_to_le16(vq->packed.event_flags_shadow); + } +} + static struct virtqueue *vring_create_virtqueue_packed( unsigned int index, unsigned int num, @@ -1968,34 +2006,12 @@ 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 = false; - 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.next_avail_idx = 0; - vq->packed.avail_wrap_counter = 1; - vq->packed.used_wrap_counter = 1; - vq->packed.event_flags_shadow = 0; - vq->packed.avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL; err = vring_alloc_state_extra_packed(num, &state, &extra); if (err) @@ -2005,16 +2021,7 @@ static struct virtqueue *vring_create_virtqueue_packed( ring_dma_addr, driver_event_dma_addr, device_event_dma_addr, ring_size_in_bytes, event_size_in_bytes, state, extra); - - /* Put everything in free lists. */ - vq->free_head = 0; - - /* No callback? Tell other side not to bother us. */ - if (!callback) { - vq->packed.event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE; - vq->packed.vring.driver->flags = - cpu_to_le16(vq->packed.event_flags_shadow); - } + vring_virtqueue_init_packed(vq, vdev); spin_lock(&vdev->vqs_list_lock); list_add_tail(&vq->vq.list, &vdev->vqs); From patchwork Wed Apr 6 03:43:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803490 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 C308FC433EF for ; Wed, 6 Apr 2022 14:00:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234172AbiDFOCH (ORCPT ); Wed, 6 Apr 2022 10:02:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34918 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234221AbiDFOBi (ORCPT ); Wed, 6 Apr 2022 10:01:38 -0400 Received: from out30-42.freemail.mail.aliyun.com (out30-42.freemail.mail.aliyun.com [115.124.30.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DCF9E21828; Tue, 5 Apr 2022 20:44:27 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R941e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04407;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JnaR0_1649216661; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JnaR0_1649216661) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:22 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 16/32] virtio_ring: packed: introduce virtqueue_reinit_packed() Date: Wed, 6 Apr 2022 11:43:30 +0800 Message-Id: <20220406034346.74409-17-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Introduce a function to initialize vq without allocating new ring, desc_state, desc_extra. Subsequent patches will call this function after reset vq to reinitialize vq. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index c783eb272468..9a4f2db718bd 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1971,6 +1971,27 @@ static void vring_virtqueue_init_packed(struct vring_virtqueue *vq, } } +static void virtqueue_reinit_packed(struct vring_virtqueue *vq) +{ + struct virtio_device *vdev = vq->vq.vdev; + int size, i; + + memset(vq->packed.vring.device, 0, vq->packed.event_size_in_bytes); + memset(vq->packed.vring.driver, 0, vq->packed.event_size_in_bytes); + memset(vq->packed.vring.desc, 0, vq->packed.ring_size_in_bytes); + + size = sizeof(struct vring_desc_state_packed) * vq->packed.vring.num; + memset(vq->packed.desc_state, 0, size); + + size = sizeof(struct vring_desc_extra) * vq->packed.vring.num; + memset(vq->packed.desc_extra, 0, size); + + for (i = 0; i < vq->packed.vring.num - 1; i++) + vq->packed.desc_extra[i].next = i + 1; + + vring_virtqueue_init_packed(vq, vdev); +} + static struct virtqueue *vring_create_virtqueue_packed( unsigned int index, unsigned int num, From patchwork Wed Apr 6 03:43:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803739 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 7A4BBC4167B for ; Wed, 6 Apr 2022 16:09:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237560AbiDFQLw (ORCPT ); Wed, 6 Apr 2022 12:11:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44614 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237519AbiDFQLl (ORCPT ); Wed, 6 Apr 2022 12:11:41 -0400 Received: from out199-2.us.a.mail.aliyun.com (out199-2.us.a.mail.aliyun.com [47.90.199.2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32236BF012; Tue, 5 Apr 2022 20:44:31 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R811e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04395;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JzisK_1649216663; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JzisK_1649216663) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:24 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 17/32] virtio_ring: packed: introduce virtqueue_resize_packed() Date: Wed, 6 Apr 2022 11:43:31 +0800 Message-Id: <20220406034346.74409-18-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org virtio ring packed supports resize. Only after the new vring is successfully allocated based on the new num, we will release the old vring. In any case, an error is returned, indicating that the vring still points to the old vring. In the case of an error, the caller must re-initialize(by virtqueue_reinit_packed()) the virtqueue to ensure that the vring can be used. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 40 ++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 9a4f2db718bd..06f66b15c86c 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2059,6 +2059,46 @@ static struct virtqueue *vring_create_virtqueue_packed( return NULL; } +static int virtqueue_resize_packed(struct virtqueue *_vq, u32 num) +{ + dma_addr_t ring_dma_addr, driver_event_dma_addr, device_event_dma_addr; + struct vring_packed_desc_event *driver, *device; + size_t ring_size_in_bytes, event_size_in_bytes; + struct vring_virtqueue *vq = to_vvq(_vq); + struct virtio_device *vdev = _vq->vdev; + struct vring_desc_state_packed *state; + struct vring_desc_extra *extra; + struct vring_packed_desc *ring; + int err; + + if (vring_alloc_queue_packed(vdev, num, &ring, &driver, &device, + &ring_dma_addr, &driver_event_dma_addr, + &device_event_dma_addr, + &ring_size_in_bytes, &event_size_in_bytes)) + goto err_ring; + + + err = vring_alloc_state_extra_packed(num, &state, &extra); + if (err) + goto err_state_extra; + + vring_free(&vq->vq); + + vring_virtqueue_attach_packed(vq, num, ring, driver, device, + ring_dma_addr, driver_event_dma_addr, + device_event_dma_addr, ring_size_in_bytes, + event_size_in_bytes, state, extra); + vring_virtqueue_init_packed(vq, vdev); + return 0; + +err_state_extra: + vring_free_queue(vdev, event_size_in_bytes, device, device_event_dma_addr); + vring_free_queue(vdev, event_size_in_bytes, driver, driver_event_dma_addr); + vring_free_queue(vdev, ring_size_in_bytes, ring, ring_dma_addr); +err_ring: + return -ENOMEM; +} + /* * Generic functions and exported symbols. From patchwork Wed Apr 6 03:43:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803741 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 EFA8AC43217 for ; Wed, 6 Apr 2022 16:10:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237482AbiDFQMC (ORCPT ); Wed, 6 Apr 2022 12:12:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44636 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237459AbiDFQLm (ORCPT ); Wed, 6 Apr 2022 12:11:42 -0400 Received: from out30-130.freemail.mail.aliyun.com (out30-130.freemail.mail.aliyun.com [115.124.30.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10756C12EA; Tue, 5 Apr 2022 20:44:32 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04357;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JmrgX_1649216665; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JmrgX_1649216665) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:26 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 18/32] virtio_ring: introduce virtqueue_resize() Date: Wed, 6 Apr 2022 11:43:32 +0800 Message-Id: <20220406034346.74409-19-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Introduce virtqueue_resize() to implement the resize of vring. Based on these, the driver can dynamically adjust the size of the vring. For example: ethtool -G. virtqueue_resize() implements resize based on the vq reset function. In case of failure to allocate a new vring, it will give up resize and use the original vring. During this process, if the re-enable reset vq fails, the vq can no longer be used. Although the probability of this situation is not high. The parameter recycle is used to recycle the buffer that is no longer used. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 69 ++++++++++++++++++++++++++++++++++++ include/linux/virtio.h | 3 ++ 2 files changed, 72 insertions(+) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 06f66b15c86c..6250e19fc5bf 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2554,6 +2554,75 @@ struct virtqueue *vring_create_virtqueue( } EXPORT_SYMBOL_GPL(vring_create_virtqueue); +/** + * virtqueue_resize - resize the vring of vq + * @_vq: the struct virtqueue we're talking about. + * @num: new ring num + * @recycle: callback for recycle the useless buffer + * + * When it is really necessary to create a new vring, it will set the current vq + * into the reset state. Then call the passed callback to recycle the buffer + * that is no longer used. Only after the new vring is successfully created, the + * old vring will be released. + * + * Caller must ensure we don't call this with other virtqueue operations + * at the same time (except where noted). + * + * Returns zero or a negative error. + */ +int virtqueue_resize(struct virtqueue *_vq, u32 num, + void (*recycle)(struct virtqueue *vq, void *buf)) +{ + struct vring_virtqueue *vq = to_vvq(_vq); + struct virtio_device *vdev = vq->vq.vdev; + bool packed; + void *buf; + int err; + + if (!vq->we_own_ring) + return -EINVAL; + + if (num > vq->vq.num_max) + return -E2BIG; + + if (!num) + return -EINVAL; + + packed = virtio_has_feature(vdev, VIRTIO_F_RING_PACKED) ? true : false; + + if ((packed ? vq->packed.vring.num : vq->split.vring.num) == num) + return 0; + + if (!vdev->config->reset_vq) + return -ENOENT; + + if (!vdev->config->enable_reset_vq) + return -ENOENT; + + err = vdev->config->reset_vq(_vq); + if (err) + return err; + + while ((buf = virtqueue_detach_unused_buf(_vq)) != NULL) + recycle(_vq, buf); + + if (packed) { + err = virtqueue_resize_packed(_vq, num); + if (err) + virtqueue_reinit_packed(vq); + } else { + err = virtqueue_resize_split(_vq, num); + if (err) + virtqueue_reinit_split(vq); + } + + if (vdev->config->enable_reset_vq(_vq)) + return -EBUSY; + + return err; +} +EXPORT_SYMBOL_GPL(virtqueue_resize); + /* Only available for split ring */ struct virtqueue *vring_new_virtqueue(unsigned int index, unsigned int num, diff --git a/include/linux/virtio.h b/include/linux/virtio.h index d59adc4be068..c86ff02e0ca0 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -91,6 +91,9 @@ dma_addr_t virtqueue_get_desc_addr(struct virtqueue *vq); dma_addr_t virtqueue_get_avail_addr(struct virtqueue *vq); dma_addr_t virtqueue_get_used_addr(struct virtqueue *vq); +int virtqueue_resize(struct virtqueue *vq, u32 num, + void (*recycle)(struct virtqueue *vq, void *buf)); + /** * virtio_device - representation of a device using virtio * @index: unique position on the virtio bus From patchwork Wed Apr 6 03:43:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803308 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 9C886C433EF for ; Wed, 6 Apr 2022 12:16:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231927AbiDFMSf (ORCPT ); Wed, 6 Apr 2022 08:18:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34084 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233001AbiDFMSG (ORCPT ); Wed, 6 Apr 2022 08:18:06 -0400 Received: from out30-42.freemail.mail.aliyun.com (out30-42.freemail.mail.aliyun.com [115.124.30.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB22C267AE8; Tue, 5 Apr 2022 20:44:36 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R201e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04357;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JnaSb_1649216667; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JnaSb_1649216667) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:29 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 19/32] virtio_pci: struct virtio_pci_common_cfg add queue_notify_data Date: Wed, 6 Apr 2022 11:43:33 +0800 Message-Id: <20220406034346.74409-20-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add queue_notify_data in struct virtio_pci_common_cfg, which comes from here https://github.com/oasis-tcs/virtio-spec/issues/89 For not breaks uABI, add a new struct virtio_pci_common_cfg_notify. Since I want to add queue_reset after queue_notify_data, I submitted this patch first. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- include/uapi/linux/virtio_pci.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h index 3a86f36d7e3d..22bec9bd0dfc 100644 --- a/include/uapi/linux/virtio_pci.h +++ b/include/uapi/linux/virtio_pci.h @@ -166,6 +166,13 @@ struct virtio_pci_common_cfg { __le32 queue_used_hi; /* read-write */ }; +struct virtio_pci_common_cfg_notify { + struct virtio_pci_common_cfg cfg; + + __le16 queue_notify_data; /* read-write */ + __le16 padding; +}; + /* Fields in VIRTIO_PCI_CAP_PCI_CFG: */ struct virtio_pci_cfg_cap { struct virtio_pci_cap cap; From patchwork Wed Apr 6 03:43:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803119 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 7FD60C433EF for ; Wed, 6 Apr 2022 10:18:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240811AbiDFKUC (ORCPT ); Wed, 6 Apr 2022 06:20:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377532AbiDFKSn (ORCPT ); Wed, 6 Apr 2022 06:18:43 -0400 Received: from out30-44.freemail.mail.aliyun.com (out30-44.freemail.mail.aliyun.com [115.124.30.44]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9AE30267AE7; Tue, 5 Apr 2022 20:44:36 -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=e01e04394;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9KCOLw_1649216670; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9KCOLw_1649216670) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:31 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 20/32] virtio: queue_reset: add VIRTIO_F_RING_RESET Date: Wed, 6 Apr 2022 11:43:34 +0800 Message-Id: <20220406034346.74409-21-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Added VIRTIO_F_RING_RESET, it came from here https://github.com/oasis-tcs/virtio-spec/issues/124 This feature indicates that the driver can reset a queue individually. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- include/uapi/linux/virtio_config.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/virtio_config.h b/include/uapi/linux/virtio_config.h index b5eda06f0d57..0862be802ff8 100644 --- a/include/uapi/linux/virtio_config.h +++ b/include/uapi/linux/virtio_config.h @@ -52,7 +52,7 @@ * rest are per-device feature bits. */ #define VIRTIO_TRANSPORT_F_START 28 -#define VIRTIO_TRANSPORT_F_END 38 +#define VIRTIO_TRANSPORT_F_END 41 #ifndef VIRTIO_CONFIG_NO_LEGACY /* Do we get callbacks when the ring is completely used, even if we've @@ -92,4 +92,9 @@ * Does the device support Single Root I/O Virtualization? */ #define VIRTIO_F_SR_IOV 37 + +/* + * This feature indicates that the driver can reset a queue individually. + */ +#define VIRTIO_F_RING_RESET 40 #endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */ From patchwork Wed Apr 6 03:43:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803085 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 2F99DC433EF for ; Wed, 6 Apr 2022 10:17:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1358318AbiDFKT3 (ORCPT ); Wed, 6 Apr 2022 06:19:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376952AbiDFKSe (ORCPT ); Wed, 6 Apr 2022 06:18:34 -0400 Received: from out30-54.freemail.mail.aliyun.com (out30-54.freemail.mail.aliyun.com [115.124.30.54]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 96838267AF5; Tue, 5 Apr 2022 20:44:38 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R181e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04357;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9KCOMY_1649216672; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9KCOMY_1649216672) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:33 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 21/32] virtio_pci: queue_reset: update struct virtio_pci_common_cfg and option functions Date: Wed, 6 Apr 2022 11:43:35 +0800 Message-Id: <20220406034346.74409-22-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add queue_reset in virtio_pci_common_cfg, and add related operation functions. For not breaks uABI, add a new struct virtio_pci_common_cfg_reset. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_pci_modern_dev.c | 36 ++++++++++++++++++++++++++ include/linux/virtio_pci_modern.h | 2 ++ include/uapi/linux/virtio_pci.h | 7 +++++ 3 files changed, 45 insertions(+) diff --git a/drivers/virtio/virtio_pci_modern_dev.c b/drivers/virtio/virtio_pci_modern_dev.c index e8b3ff2b9fbc..8c74b00bc511 100644 --- a/drivers/virtio/virtio_pci_modern_dev.c +++ b/drivers/virtio/virtio_pci_modern_dev.c @@ -3,6 +3,7 @@ #include #include #include +#include /* * vp_modern_map_capability - map a part of virtio pci capability @@ -463,6 +464,41 @@ void vp_modern_set_status(struct virtio_pci_modern_device *mdev, } EXPORT_SYMBOL_GPL(vp_modern_set_status); +/* + * vp_modern_get_queue_reset - get the queue reset status + * @mdev: the modern virtio-pci device + * @index: queue index + */ +int vp_modern_get_queue_reset(struct virtio_pci_modern_device *mdev, u16 index) +{ + struct virtio_pci_common_cfg_reset __iomem *cfg; + + cfg = (struct virtio_pci_common_cfg_reset __iomem *)mdev->common; + + vp_iowrite16(index, &cfg->cfg.queue_select); + return vp_ioread16(&cfg->queue_reset); +} +EXPORT_SYMBOL_GPL(vp_modern_get_queue_reset); + +/* + * vp_modern_set_queue_reset - reset the queue + * @mdev: the modern virtio-pci device + * @index: queue index + */ +void vp_modern_set_queue_reset(struct virtio_pci_modern_device *mdev, u16 index) +{ + struct virtio_pci_common_cfg_reset __iomem *cfg; + + cfg = (struct virtio_pci_common_cfg_reset __iomem *)mdev->common; + + vp_iowrite16(index, &cfg->cfg.queue_select); + vp_iowrite16(1, &cfg->queue_reset); + + while (vp_ioread16(&cfg->queue_reset) != 1) + msleep(1); +} +EXPORT_SYMBOL_GPL(vp_modern_set_queue_reset); + /* * vp_modern_queue_vector - set the MSIX vector for a specific virtqueue * @mdev: the modern virtio-pci device diff --git a/include/linux/virtio_pci_modern.h b/include/linux/virtio_pci_modern.h index eb2bd9b4077d..cc4154dd7b28 100644 --- a/include/linux/virtio_pci_modern.h +++ b/include/linux/virtio_pci_modern.h @@ -106,4 +106,6 @@ void __iomem * vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev, u16 index, resource_size_t *pa); int vp_modern_probe(struct virtio_pci_modern_device *mdev); void vp_modern_remove(struct virtio_pci_modern_device *mdev); +int vp_modern_get_queue_reset(struct virtio_pci_modern_device *mdev, u16 index); +void vp_modern_set_queue_reset(struct virtio_pci_modern_device *mdev, u16 index); #endif diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h index 22bec9bd0dfc..d9462efd6ce8 100644 --- a/include/uapi/linux/virtio_pci.h +++ b/include/uapi/linux/virtio_pci.h @@ -173,6 +173,13 @@ struct virtio_pci_common_cfg_notify { __le16 padding; }; +struct virtio_pci_common_cfg_reset { + struct virtio_pci_common_cfg cfg; + + __le16 queue_notify_data; /* read-write */ + __le16 queue_reset; /* read-write */ +}; + /* Fields in VIRTIO_PCI_CAP_PCI_CFG: */ struct virtio_pci_cfg_cap { struct virtio_pci_cap cap; From patchwork Wed Apr 6 03:43:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803116 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 0293AC433EF for ; Wed, 6 Apr 2022 10:18:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378447AbiDFKTu (ORCPT ); Wed, 6 Apr 2022 06:19:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58534 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376955AbiDFKSe (ORCPT ); Wed, 6 Apr 2022 06:18:34 -0400 Received: from out30-44.freemail.mail.aliyun.com (out30-44.freemail.mail.aliyun.com [115.124.30.44]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 94C5F26B3BF; Tue, 5 Apr 2022 20:44:42 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;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=34;SR=0;TI=SMTPD_---0V9K8DcK_1649216674; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9K8DcK_1649216674) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:35 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 22/32] virtio_pci: queue_reset: extract the logic of active vq for modern pci Date: Wed, 6 Apr 2022 11:43:36 +0800 Message-Id: <20220406034346.74409-23-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Introduce vp_active_vq() to configure vring to backend after vq attach vring. And configure vq vector if necessary. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/virtio/virtio_pci_modern.c | 46 ++++++++++++++++++------------ 1 file changed, 28 insertions(+), 18 deletions(-) diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index 86d301f272b8..49a4493732cf 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -176,6 +176,29 @@ static void vp_reset(struct virtio_device *vdev) vp_disable_cbs(vdev); } +static int vp_active_vq(struct virtqueue *vq, u16 msix_vec) +{ + struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev); + struct virtio_pci_modern_device *mdev = &vp_dev->mdev; + unsigned long index; + + index = vq->index; + + /* 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), + virtqueue_get_avail_addr(vq), + virtqueue_get_used_addr(vq)); + + if (msix_vec != VIRTIO_MSI_NO_VECTOR) { + msix_vec = vp_modern_queue_vector(mdev, index, msix_vec); + if (msix_vec == VIRTIO_MSI_NO_VECTOR) + return -EBUSY; + } + + return 0; +} + static u16 vp_config_vector(struct virtio_pci_device *vp_dev, u16 vector) { return vp_modern_config_vector(&vp_dev->mdev, vector); @@ -220,32 +243,19 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, 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), - virtqueue_get_avail_addr(vq), - virtqueue_get_used_addr(vq)); + err = vp_active_vq(vq, msix_vec); + if (err) + goto err; vq->priv = (void __force *)vp_modern_map_vq_notify(mdev, index, NULL); if (!vq->priv) { err = -ENOMEM; - goto err_map_notify; - } - - if (msix_vec != VIRTIO_MSI_NO_VECTOR) { - msix_vec = vp_modern_queue_vector(mdev, index, msix_vec); - if (msix_vec == VIRTIO_MSI_NO_VECTOR) { - err = -EBUSY; - goto err_assign_vector; - } + goto err; } return vq; -err_assign_vector: - if (!mdev->notify_base) - pci_iounmap(mdev->pci_dev, (void __iomem __force *)vq->priv); -err_map_notify: +err: vring_del_virtqueue(vq); return ERR_PTR(err); } From patchwork Wed Apr 6 03:43:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803306 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 71604C43217 for ; Wed, 6 Apr 2022 12:16:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231357AbiDFMSW (ORCPT ); Wed, 6 Apr 2022 08:18:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232533AbiDFMRY (ORCPT ); Wed, 6 Apr 2022 08:17:24 -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 A3EA426B58C; Tue, 5 Apr 2022 20:44:42 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R251e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04426;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9Jmri3_1649216676; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9Jmri3_1649216676) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:37 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 23/32] virtio_pci: queue_reset: support VIRTIO_F_RING_RESET Date: Wed, 6 Apr 2022 11:43:37 +0800 Message-Id: <20220406034346.74409-24-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This patch implements virtio pci support for QUEUE RESET. Performing reset on a queue is divided into these steps: 1. notify the device to reset the queue 2. recycle the buffer submitted 3. reset the vring (may re-alloc) 4. mmap vring to device, and enable the queue This patch implements virtio_reset_vq(), virtio_enable_resetq() in the pci scenario. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_pci_common.c | 8 +-- drivers/virtio/virtio_pci_modern.c | 84 ++++++++++++++++++++++++++++++ drivers/virtio/virtio_ring.c | 2 + include/linux/virtio.h | 1 + 4 files changed, 92 insertions(+), 3 deletions(-) diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index fdbde1db5ec5..863d3a8a0956 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -248,9 +248,11 @@ static void vp_del_vq(struct virtqueue *vq) struct virtio_pci_vq_info *info = vp_dev->vqs[vq->index]; unsigned long flags; - spin_lock_irqsave(&vp_dev->lock, flags); - list_del(&info->node); - spin_unlock_irqrestore(&vp_dev->lock, flags); + if (!vq->reset) { + spin_lock_irqsave(&vp_dev->lock, flags); + list_del(&info->node); + spin_unlock_irqrestore(&vp_dev->lock, flags); + } vp_dev->del_vq(info); kfree(info); diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index 49a4493732cf..cb5d38f1c9c8 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -34,6 +34,9 @@ static void vp_transport_features(struct virtio_device *vdev, u64 features) if ((features & BIT_ULL(VIRTIO_F_SR_IOV)) && pci_find_ext_capability(pci_dev, PCI_EXT_CAP_ID_SRIOV)) __virtio_set_bit(vdev, VIRTIO_F_SR_IOV); + + if (features & BIT_ULL(VIRTIO_F_RING_RESET)) + __virtio_set_bit(vdev, VIRTIO_F_RING_RESET); } /* virtio config->finalize_features() implementation */ @@ -199,6 +202,83 @@ static int vp_active_vq(struct virtqueue *vq, u16 msix_vec) return 0; } +static int vp_modern_reset_vq(struct virtqueue *vq) +{ + struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev); + struct virtio_pci_modern_device *mdev = &vp_dev->mdev; + struct virtio_pci_vq_info *info; + unsigned long flags; + + if (!virtio_has_feature(vq->vdev, VIRTIO_F_RING_RESET)) + return -ENOENT; + + vp_modern_set_queue_reset(mdev, vq->index); + + info = vp_dev->vqs[vq->index]; + + /* delete vq from irq handler */ + spin_lock_irqsave(&vp_dev->lock, flags); + list_del(&info->node); + spin_unlock_irqrestore(&vp_dev->lock, flags); + + INIT_LIST_HEAD(&info->node); + + /* For the case where vq has an exclusive irq, to prevent the irq from + * being received again and the pending irq, call disable_irq(). + * + * In the scenario based on shared interrupts, vq will be searched from + * the queue virtqueues. Since the previous list_del() has been deleted + * from the queue, it is impossible for vq to be called in this case. + * There is no need to close the corresponding interrupt. + */ + if (vp_dev->per_vq_vectors && info->msix_vector != VIRTIO_MSI_NO_VECTOR) + disable_irq(pci_irq_vector(vp_dev->pci_dev, info->msix_vector)); + + vq->reset = true; + + return 0; +} + +static int vp_modern_enable_reset_vq(struct virtqueue *vq) +{ + struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev); + struct virtio_pci_modern_device *mdev = &vp_dev->mdev; + struct virtio_pci_vq_info *info; + unsigned long flags, index; + int err; + + if (!vq->reset) + return -EBUSY; + + index = vq->index; + info = vp_dev->vqs[index]; + + /* check queue reset status */ + if (vp_modern_get_queue_reset(mdev, index) != 1) + return -EBUSY; + + err = vp_active_vq(vq, info->msix_vector); + if (err) + return err; + + if (vq->callback) { + spin_lock_irqsave(&vp_dev->lock, flags); + list_add(&info->node, &vp_dev->virtqueues); + spin_unlock_irqrestore(&vp_dev->lock, flags); + } else { + INIT_LIST_HEAD(&info->node); + } + + vp_modern_set_queue_enable(&vp_dev->mdev, index, true); + + if (vp_dev->per_vq_vectors && info->msix_vector != VIRTIO_MSI_NO_VECTOR) + enable_irq(pci_irq_vector(vp_dev->pci_dev, info->msix_vector)); + + vq->reset = false; + + return 0; +} + static u16 vp_config_vector(struct virtio_pci_device *vp_dev, u16 vector) { return vp_modern_config_vector(&vp_dev->mdev, vector); @@ -407,6 +487,8 @@ static const struct virtio_config_ops virtio_pci_config_nodev_ops = { .set_vq_affinity = vp_set_vq_affinity, .get_vq_affinity = vp_get_vq_affinity, .get_shm_region = vp_get_shm_region, + .reset_vq = vp_modern_reset_vq, + .enable_reset_vq = vp_modern_enable_reset_vq, }; static const struct virtio_config_ops virtio_pci_config_ops = { @@ -425,6 +507,8 @@ static const struct virtio_config_ops virtio_pci_config_ops = { .set_vq_affinity = vp_set_vq_affinity, .get_vq_affinity = vp_get_vq_affinity, .get_shm_region = vp_get_shm_region, + .reset_vq = vp_modern_reset_vq, + .enable_reset_vq = vp_modern_enable_reset_vq, }; /* the PCI probing function */ diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 6250e19fc5bf..91937e21edca 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2028,6 +2028,7 @@ static struct virtqueue *vring_create_virtqueue_packed( vq->vq.vdev = vdev; vq->vq.name = name; vq->vq.index = index; + vq->vq.reset = false; vq->notify = notify; vq->weak_barriers = weak_barriers; @@ -2508,6 +2509,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, vq->vq.vdev = vdev; vq->vq.name = name; vq->vq.index = index; + vq->vq.reset = false; vq->notify = notify; vq->weak_barriers = weak_barriers; diff --git a/include/linux/virtio.h b/include/linux/virtio.h index c86ff02e0ca0..33ab003c5100 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -33,6 +33,7 @@ struct virtqueue { unsigned int num_free; unsigned int num_max; void *priv; + bool reset; }; int virtqueue_add_outbuf(struct virtqueue *vq, From patchwork Wed Apr 6 03:43:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803117 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 88135C4332F for ; Wed, 6 Apr 2022 10:18:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378139AbiDFKTm (ORCPT ); Wed, 6 Apr 2022 06:19:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56646 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376980AbiDFKSe (ORCPT ); Wed, 6 Apr 2022 06:18:34 -0400 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 938B9273DD1; Tue, 5 Apr 2022 20:44:45 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R141e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04395;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JziwX_1649216678; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JziwX_1649216678) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:39 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 24/32] virtio: find_vqs() add arg sizes Date: Wed, 6 Apr 2022 11:43:38 +0800 Message-Id: <20220406034346.74409-25-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org find_vqs() adds a new parameter sizes to specify the size of each vq vring. 0 means use the maximum size supported by the backend. In the split scenario, the meaning of size is the largest size, because it may be limited by memory, the virtio core will try a smaller size. And the size is power of 2. Signed-off-by: Xuan Zhuo Acked-by: Hans de Goede Reviewed-by: Mathieu Poirier --- arch/um/drivers/virtio_uml.c | 2 +- drivers/platform/mellanox/mlxbf-tmfifo.c | 1 + drivers/remoteproc/remoteproc_virtio.c | 1 + drivers/s390/virtio/virtio_ccw.c | 1 + drivers/virtio/virtio_mmio.c | 1 + drivers/virtio/virtio_pci_common.c | 2 +- drivers/virtio/virtio_pci_common.h | 2 +- drivers/virtio/virtio_pci_modern.c | 7 +++++-- drivers/virtio/virtio_vdpa.c | 1 + include/linux/virtio_config.h | 14 +++++++++----- 10 files changed, 22 insertions(+), 10 deletions(-) diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c index 904993d15a85..6af98d130840 100644 --- a/arch/um/drivers/virtio_uml.c +++ b/arch/um/drivers/virtio_uml.c @@ -998,7 +998,7 @@ static struct virtqueue *vu_setup_vq(struct virtio_device *vdev, static int vu_find_vqs(struct virtio_device *vdev, unsigned nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], const bool *ctx, + const char * const names[], u32 sizes[], const bool *ctx, struct irq_affinity *desc) { struct virtio_uml_device *vu_dev = to_virtio_uml_device(vdev); diff --git a/drivers/platform/mellanox/mlxbf-tmfifo.c b/drivers/platform/mellanox/mlxbf-tmfifo.c index 1ae3c56b66b0..8be13d416f48 100644 --- a/drivers/platform/mellanox/mlxbf-tmfifo.c +++ b/drivers/platform/mellanox/mlxbf-tmfifo.c @@ -928,6 +928,7 @@ static int mlxbf_tmfifo_virtio_find_vqs(struct virtio_device *vdev, struct virtqueue *vqs[], vq_callback_t *callbacks[], const char * const names[], + u32 sizes[], const bool *ctx, struct irq_affinity *desc) { diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c index 7611755d0ae2..baad31c9da45 100644 --- a/drivers/remoteproc/remoteproc_virtio.c +++ b/drivers/remoteproc/remoteproc_virtio.c @@ -158,6 +158,7 @@ static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned int nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], const char * const names[], + u32 sizes[], const bool * ctx, struct irq_affinity *desc) { diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c index 468da60b56c5..f0c814a54e78 100644 --- a/drivers/s390/virtio/virtio_ccw.c +++ b/drivers/s390/virtio/virtio_ccw.c @@ -634,6 +634,7 @@ static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], const char * const names[], + u32 sizes[], const bool *ctx, struct irq_affinity *desc) { diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c index a41abc8051b9..9d5a674bdeec 100644 --- a/drivers/virtio/virtio_mmio.c +++ b/drivers/virtio/virtio_mmio.c @@ -461,6 +461,7 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], const char * const names[], + u32 sizes[], const bool *ctx, struct irq_affinity *desc) { diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index 863d3a8a0956..826ea2e35d54 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -427,7 +427,7 @@ static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned nvqs, /* the config->find_vqs() implementation */ int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], const bool *ctx, + const char * const names[], u32 sizes[], const bool *ctx, struct irq_affinity *desc) { int err; diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h index 23f6c5c678d5..859eed559e10 100644 --- a/drivers/virtio/virtio_pci_common.h +++ b/drivers/virtio/virtio_pci_common.h @@ -113,7 +113,7 @@ void vp_del_vqs(struct virtio_device *vdev); /* the config->find_vqs() implementation */ int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], const bool *ctx, + const char * const names[], u32 sizes[], const bool *ctx, struct irq_affinity *desc); const char *vp_bus_name(struct virtio_device *vdev); diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index cb5d38f1c9c8..3b35e5056165 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -343,12 +343,15 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, static int vp_modern_find_vqs(struct virtio_device *vdev, unsigned nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], const bool *ctx, + const char * const names[], + u32 sizes[], + const bool *ctx, struct irq_affinity *desc) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); struct virtqueue *vq; - int rc = vp_find_vqs(vdev, nvqs, vqs, callbacks, names, ctx, desc); + int rc = vp_find_vqs(vdev, nvqs, vqs, callbacks, names, sizes, ctx, + desc); if (rc) return rc; diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index 39e4c08eb0f2..ac86d3a6633c 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -269,6 +269,7 @@ static int virtio_vdpa_find_vqs(struct virtio_device *vdev, unsigned nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], const char * const names[], + u32 sizes[], const bool *ctx, struct irq_affinity *desc) { diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index d4adcd0e1c57..0f7def7ddfd2 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -57,6 +57,7 @@ struct virtio_shm_region { * include a NULL entry for vqs that do not need a callback * names: array of virtqueue names (mainly for debugging) * include a NULL entry for vqs unused by driver + * sizes: array of virtqueue sizes * Returns 0 on success or error status * @del_vqs: free virtqueues found by find_vqs(). * @get_features: get the array of feature bits for this device. @@ -98,7 +99,9 @@ struct virtio_config_ops { void (*reset)(struct virtio_device *vdev); int (*find_vqs)(struct virtio_device *, unsigned nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], const bool *ctx, + const char * const names[], + u32 sizes[], + const bool *ctx, struct irq_affinity *desc); void (*del_vqs)(struct virtio_device *); u64 (*get_features)(struct virtio_device *vdev); @@ -206,7 +209,7 @@ struct virtqueue *virtio_find_single_vq(struct virtio_device *vdev, const char *names[] = { n }; struct virtqueue *vq; int err = vdev->config->find_vqs(vdev, 1, &vq, callbacks, names, NULL, - NULL); + NULL, NULL); if (err < 0) return ERR_PTR(err); return vq; @@ -218,7 +221,8 @@ int virtio_find_vqs(struct virtio_device *vdev, unsigned nvqs, const char * const names[], struct irq_affinity *desc) { - return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, NULL, desc); + return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, NULL, + NULL, desc); } static inline @@ -227,8 +231,8 @@ int virtio_find_vqs_ctx(struct virtio_device *vdev, unsigned nvqs, const char * const names[], const bool *ctx, struct irq_affinity *desc) { - return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, ctx, - desc); + return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, NULL, + ctx, desc); } /** From patchwork Wed Apr 6 03:43:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803307 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 A8002C433FE for ; Wed, 6 Apr 2022 12:16:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232248AbiDFMS0 (ORCPT ); Wed, 6 Apr 2022 08:18:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44132 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232336AbiDFMRY (ORCPT ); Wed, 6 Apr 2022 08:17:24 -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 A45EB273DE0; Tue, 5 Apr 2022 20:44:47 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R211e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04407;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JnaV1_1649216680; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JnaV1_1649216680) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:42 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 25/32] virtio_pci: support the arg sizes of find_vqs() Date: Wed, 6 Apr 2022 11:43:39 +0800 Message-Id: <20220406034346.74409-26-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Virtio PCI supports new parameter sizes of find_vqs(). Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/virtio/virtio_pci_common.c | 18 ++++++++++-------- drivers/virtio/virtio_pci_common.h | 1 + drivers/virtio/virtio_pci_legacy.c | 6 +++++- drivers/virtio/virtio_pci_modern.c | 10 +++++++--- 4 files changed, 23 insertions(+), 12 deletions(-) diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index 826ea2e35d54..23976c61583f 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -208,6 +208,7 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned index, void (*callback)(struct virtqueue *vq), const char *name, + u32 size, bool ctx, u16 msix_vec) { @@ -220,7 +221,7 @@ static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned index, if (!info) return ERR_PTR(-ENOMEM); - vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, ctx, + vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, size, ctx, msix_vec); if (IS_ERR(vq)) goto out_info; @@ -314,7 +315,7 @@ void vp_del_vqs(struct virtio_device *vdev) static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], bool per_vq_vectors, + const char * const names[], u32 sizes[], bool per_vq_vectors, const bool *ctx, struct irq_affinity *desc) { @@ -357,8 +358,8 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs, else msix_vec = VP_MSIX_VQ_VECTOR; vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i], - ctx ? ctx[i] : false, - msix_vec); + sizes ? sizes[i] : 0, + ctx ? ctx[i] : false, msix_vec); if (IS_ERR(vqs[i])) { err = PTR_ERR(vqs[i]); goto error_find; @@ -388,7 +389,7 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs, static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], const bool *ctx) + const char * const names[], u32 sizes[], const bool *ctx) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); int i, err, queue_idx = 0; @@ -410,6 +411,7 @@ static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned nvqs, continue; } vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i], + sizes ? sizes[i] : 0, ctx ? ctx[i] : false, VIRTIO_MSI_NO_VECTOR); if (IS_ERR(vqs[i])) { @@ -433,15 +435,15 @@ int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs, int err; /* Try MSI-X with one vector per queue. */ - err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, true, ctx, desc); + err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, sizes, true, ctx, desc); if (!err) return 0; /* Fallback: MSI-X with one vector for config, one shared for queues. */ - err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, false, ctx, desc); + err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, sizes, false, ctx, desc); if (!err) return 0; /* Finally fall back to regular interrupts. */ - return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names, ctx); + return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names, sizes, ctx); } const char *vp_bus_name(struct virtio_device *vdev) diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h index 859eed559e10..fbf5a6d4b164 100644 --- a/drivers/virtio/virtio_pci_common.h +++ b/drivers/virtio/virtio_pci_common.h @@ -81,6 +81,7 @@ struct virtio_pci_device { unsigned idx, void (*callback)(struct virtqueue *vq), const char *name, + u32 size, bool ctx, u16 msix_vec); void (*del_vq)(struct virtio_pci_vq_info *info); diff --git a/drivers/virtio/virtio_pci_legacy.c b/drivers/virtio/virtio_pci_legacy.c index b68934fe6b5d..2c4ade5fb420 100644 --- a/drivers/virtio/virtio_pci_legacy.c +++ b/drivers/virtio/virtio_pci_legacy.c @@ -112,6 +112,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, unsigned index, void (*callback)(struct virtqueue *vq), const char *name, + u32 size, bool ctx, u16 msix_vec) { @@ -125,10 +126,13 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, if (!num || vp_legacy_get_queue_enable(&vp_dev->ldev, index)) return ERR_PTR(-ENOENT); + if (!size || size > num) + size = num; + info->msix_vector = msix_vec; /* create the vring */ - vq = vring_create_virtqueue(index, num, + vq = vring_create_virtqueue(index, size, VIRTIO_PCI_VRING_ALIGN, &vp_dev->vdev, true, false, ctx, vp_notify, callback, name); diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index 3b35e5056165..a17c47d4435a 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -289,6 +289,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, unsigned index, void (*callback)(struct virtqueue *vq), const char *name, + u32 size, bool ctx, u16 msix_vec) { @@ -306,15 +307,18 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, if (!num || vp_modern_get_queue_enable(mdev, index)) return ERR_PTR(-ENOENT); - if (num & (num - 1)) { - dev_warn(&vp_dev->pci_dev->dev, "bad queue size %u", num); + if (!size || size > num) + size = num; + + if (size & (size - 1)) { + dev_warn(&vp_dev->pci_dev->dev, "bad queue size %u", size); return ERR_PTR(-EINVAL); } info->msix_vector = msix_vec; /* create the vring */ - vq = vring_create_virtqueue(index, num, + vq = vring_create_virtqueue(index, size, SMP_CACHE_BYTES, &vp_dev->vdev, true, true, ctx, vp_notify, callback, name); From patchwork Wed Apr 6 03:43:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803740 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 5D013C4167E for ; Wed, 6 Apr 2022 16:09:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237600AbiDFQLy (ORCPT ); Wed, 6 Apr 2022 12:11:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237537AbiDFQLm (ORCPT ); Wed, 6 Apr 2022 12:11:42 -0400 Received: from out30-56.freemail.mail.aliyun.com (out30-56.freemail.mail.aliyun.com [115.124.30.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D3422816B5; Tue, 5 Apr 2022 20:44:49 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R771e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04423;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JnaVR_1649216682; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JnaVR_1649216682) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:44 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 26/32] virtio_mmio: support the arg sizes of find_vqs() Date: Wed, 6 Apr 2022 11:43:40 +0800 Message-Id: <20220406034346.74409-27-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Virtio MMIO support the new parameter sizes of find_vqs(). Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/virtio/virtio_mmio.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c index 9d5a674bdeec..51cf51764a92 100644 --- a/drivers/virtio/virtio_mmio.c +++ b/drivers/virtio/virtio_mmio.c @@ -347,7 +347,7 @@ static void vm_del_vqs(struct virtio_device *vdev) static struct virtqueue *vm_setup_vq(struct virtio_device *vdev, unsigned index, void (*callback)(struct virtqueue *vq), - const char *name, bool ctx) + const char *name, u32 size, bool ctx) { struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev); struct virtio_mmio_vq_info *info; @@ -382,8 +382,11 @@ static struct virtqueue *vm_setup_vq(struct virtio_device *vdev, unsigned index, goto error_new_virtqueue; } + if (!size || size > num) + size = num; + /* Create the vring */ - vq = vring_create_virtqueue(index, num, VIRTIO_MMIO_VRING_ALIGN, vdev, + vq = vring_create_virtqueue(index, size, VIRTIO_MMIO_VRING_ALIGN, vdev, true, true, ctx, vm_notify, callback, name); if (!vq) { err = -ENOMEM; @@ -484,6 +487,7 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs, } vqs[i] = vm_setup_vq(vdev, queue_idx++, callbacks[i], names[i], + sizes ? sizes[i] : 0, ctx ? ctx[i] : false); if (IS_ERR(vqs[i])) { vm_del_vqs(vdev); From patchwork Wed Apr 6 03:43:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803118 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 98A7EC433FE for ; Wed, 6 Apr 2022 10:18:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350328AbiDFKT7 (ORCPT ); Wed, 6 Apr 2022 06:19:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33658 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376984AbiDFKSg (ORCPT ); Wed, 6 Apr 2022 06:18:36 -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 9CBDD28255C; Tue, 5 Apr 2022 20:44:51 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R161e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04357;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9K2XHM_1649216685; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9K2XHM_1649216685) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:46 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 27/32] virtio: add helper virtio_find_vqs_ctx_size() Date: Wed, 6 Apr 2022 11:43:41 +0800 Message-Id: <20220406034346.74409-28-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Introduce helper virtio_find_vqs_ctx_size() to call find_vqs and specify the maximum size of each vq ring. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- include/linux/virtio_config.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 0f7def7ddfd2..22e29c926946 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -235,6 +235,18 @@ int virtio_find_vqs_ctx(struct virtio_device *vdev, unsigned nvqs, ctx, desc); } +static inline +int virtio_find_vqs_ctx_size(struct virtio_device *vdev, u32 nvqs, + struct virtqueue *vqs[], + vq_callback_t *callbacks[], + const char * const names[], + u32 sizes[], + const bool *ctx, struct irq_affinity *desc) +{ + return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, sizes, + ctx, desc); +} + /** * virtio_device_ready - enable vq use in probe function * @vdev: the device From patchwork Wed Apr 6 03:43:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803540 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 62674C433EF for ; Wed, 6 Apr 2022 14:22:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234768AbiDFOYe (ORCPT ); Wed, 6 Apr 2022 10:24:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234765AbiDFOYN (ORCPT ); Wed, 6 Apr 2022 10:24:13 -0400 Received: from out30-42.freemail.mail.aliyun.com (out30-42.freemail.mail.aliyun.com [115.124.30.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC2AF28AC63; Tue, 5 Apr 2022 20:44:53 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04407;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9K8Del_1649216687; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9K8Del_1649216687) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:48 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 28/32] virtio_net: set the default max ring size by find_vqs() Date: Wed, 6 Apr 2022 11:43:42 +0800 Message-Id: <20220406034346.74409-29-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Use virtio_find_vqs_ctx_size() to specify the maximum ring size of tx, rx at the same time. | rx/tx ring size ------------------------------------------- speed == UNKNOWN or < 10G| 1024 speed < 40G | 4096 speed >= 40G | 8192 Call virtnet_update_settings() once before calling init_vqs() to update speed. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/net/virtio_net.c | 42 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 38 insertions(+), 4 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index a801ea40908f..dad497a47b3a 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2861,6 +2861,29 @@ static unsigned int mergeable_min_buf_len(struct virtnet_info *vi, struct virtqu (unsigned int)GOOD_PACKET_LEN); } +static void virtnet_config_sizes(struct virtnet_info *vi, u32 *sizes) +{ + u32 i, rx_size, tx_size; + + if (vi->speed == SPEED_UNKNOWN || vi->speed < SPEED_10000) { + rx_size = 1024; + tx_size = 1024; + + } else if (vi->speed < SPEED_40000) { + rx_size = 1024 * 4; + tx_size = 1024 * 4; + + } else { + rx_size = 1024 * 8; + tx_size = 1024 * 8; + } + + for (i = 0; i < vi->max_queue_pairs; i++) { + sizes[rxq2vq(i)] = rx_size; + sizes[txq2vq(i)] = tx_size; + } +} + static int virtnet_find_vqs(struct virtnet_info *vi) { vq_callback_t **callbacks; @@ -2868,6 +2891,7 @@ static int virtnet_find_vqs(struct virtnet_info *vi) int ret = -ENOMEM; int i, total_vqs; const char **names; + u32 *sizes; bool *ctx; /* We expect 1 RX virtqueue followed by 1 TX virtqueue, followed by @@ -2895,10 +2919,15 @@ static int virtnet_find_vqs(struct virtnet_info *vi) ctx = NULL; } + sizes = kmalloc_array(total_vqs, sizeof(*sizes), GFP_KERNEL); + if (!sizes) + goto err_sizes; + /* Parameters for control virtqueue, if any */ if (vi->has_cvq) { callbacks[total_vqs - 1] = NULL; names[total_vqs - 1] = "control"; + sizes[total_vqs - 1] = 64; } /* Allocate/initialize parameters for send/receive virtqueues */ @@ -2913,8 +2942,10 @@ static int virtnet_find_vqs(struct virtnet_info *vi) ctx[rxq2vq(i)] = true; } - ret = virtio_find_vqs_ctx(vi->vdev, total_vqs, vqs, callbacks, - names, ctx, NULL); + virtnet_config_sizes(vi, sizes); + + ret = virtio_find_vqs_ctx_size(vi->vdev, total_vqs, vqs, callbacks, + names, sizes, ctx, NULL); if (ret) goto err_find; @@ -2934,6 +2965,8 @@ static int virtnet_find_vqs(struct virtnet_info *vi) err_find: + kfree(sizes); +err_sizes: kfree(ctx); err_ctx: kfree(names); @@ -3252,6 +3285,9 @@ static int virtnet_probe(struct virtio_device *vdev) vi->curr_queue_pairs = num_online_cpus(); vi->max_queue_pairs = max_queue_pairs; + virtnet_init_settings(dev); + virtnet_update_settings(vi); + /* Allocate/initialize the rx/tx queues, and invoke find_vqs */ err = init_vqs(vi); if (err) @@ -3264,8 +3300,6 @@ static int virtnet_probe(struct virtio_device *vdev) netif_set_real_num_tx_queues(dev, vi->curr_queue_pairs); netif_set_real_num_rx_queues(dev, vi->curr_queue_pairs); - virtnet_init_settings(dev); - if (virtio_has_feature(vdev, VIRTIO_NET_F_STANDBY)) { vi->failover = net_failover_create(vi->dev); if (IS_ERR(vi->failover)) { From patchwork Wed Apr 6 03:43:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803405 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 093BAC433F5 for ; Wed, 6 Apr 2022 13:12:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232531AbiDFNOx (ORCPT ); Wed, 6 Apr 2022 09:14:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232677AbiDFNNx (ORCPT ); Wed, 6 Apr 2022 09:13:53 -0400 Received: from out30-42.freemail.mail.aliyun.com (out30-42.freemail.mail.aliyun.com [115.124.30.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B317E295243; Tue, 5 Apr 2022 20:44:56 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R851e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04395;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9Jmrkf_1649216689; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9Jmrkf_1649216689) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:50 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 29/32] virtio_net: get ringparam by virtqueue_get_vring_max_size() Date: Wed, 6 Apr 2022 11:43:43 +0800 Message-Id: <20220406034346.74409-30-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Use virtqueue_get_vring_max_size() in virtnet_get_ringparam() to set tx,rx_max_pending. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/net/virtio_net.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index dad497a47b3a..96d96c666c8c 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2177,10 +2177,10 @@ static void virtnet_get_ringparam(struct net_device *dev, { struct virtnet_info *vi = netdev_priv(dev); - ring->rx_max_pending = virtqueue_get_vring_size(vi->rq[0].vq); - ring->tx_max_pending = virtqueue_get_vring_size(vi->sq[0].vq); - ring->rx_pending = ring->rx_max_pending; - ring->tx_pending = ring->tx_max_pending; + ring->rx_max_pending = virtqueue_get_vring_max_size(vi->rq[0].vq); + ring->tx_max_pending = virtqueue_get_vring_max_size(vi->sq[0].vq); + ring->rx_pending = virtqueue_get_vring_size(vi->rq[0].vq); + ring->tx_pending = virtqueue_get_vring_size(vi->sq[0].vq); } From patchwork Wed Apr 6 03:43:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803120 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 52A66C4332F for ; Wed, 6 Apr 2022 10:18:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376358AbiDFKUH (ORCPT ); Wed, 6 Apr 2022 06:20:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53190 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377555AbiDFKSn (ORCPT ); Wed, 6 Apr 2022 06:18:43 -0400 Received: from out30-57.freemail.mail.aliyun.com (out30-57.freemail.mail.aliyun.com [115.124.30.57]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F317FABD6; Tue, 5 Apr 2022 20:44:57 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R691e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04394;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9JnaX5_1649216691; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9JnaX5_1649216691) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:52 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 30/32] virtio_net: split free_unused_bufs() Date: Wed, 6 Apr 2022 11:43:44 +0800 Message-Id: <20220406034346.74409-31-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This patch separates two functions for freeing sq buf and rq buf from free_unused_bufs(). When supporting the enable/disable tx/rq queue in the future, it is necessary to support separate recovery of a sq buf or a rq buf. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/net/virtio_net.c | 41 ++++++++++++++++++++++++---------------- 1 file changed, 25 insertions(+), 16 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 96d96c666c8c..b8bf00525177 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2804,6 +2804,27 @@ static void free_receive_page_frags(struct virtnet_info *vi) put_page(vi->rq[i].alloc_frag.page); } +static void virtnet_sq_free_unused_buf(struct virtqueue *vq, void *buf) +{ + if (!is_xdp_frame(buf)) + dev_kfree_skb(buf); + else + xdp_return_frame(ptr_to_xdp(buf)); +} + +static void virtnet_rq_free_unused_buf(struct virtqueue *vq, void *buf) +{ + struct virtnet_info *vi = vq->vdev->priv; + int i = vq2rxq(vq); + + if (vi->mergeable_rx_bufs) + put_page(virt_to_head_page(buf)); + else if (vi->big_packets) + give_pages(&vi->rq[i], buf); + else + put_page(virt_to_head_page(buf)); +} + static void free_unused_bufs(struct virtnet_info *vi) { void *buf; @@ -2811,26 +2832,14 @@ static void free_unused_bufs(struct virtnet_info *vi) for (i = 0; i < vi->max_queue_pairs; i++) { struct virtqueue *vq = vi->sq[i].vq; - while ((buf = virtqueue_detach_unused_buf(vq)) != NULL) { - if (!is_xdp_frame(buf)) - dev_kfree_skb(buf); - else - xdp_return_frame(ptr_to_xdp(buf)); - } + while ((buf = virtqueue_detach_unused_buf(vq)) != NULL) + virtnet_sq_free_unused_buf(vq, buf); } for (i = 0; i < vi->max_queue_pairs; i++) { struct virtqueue *vq = vi->rq[i].vq; - - while ((buf = virtqueue_detach_unused_buf(vq)) != NULL) { - if (vi->mergeable_rx_bufs) { - put_page(virt_to_head_page(buf)); - } else if (vi->big_packets) { - give_pages(&vi->rq[i], buf); - } else { - put_page(virt_to_head_page(buf)); - } - } + while ((buf = virtqueue_detach_unused_buf(vq)) != NULL) + virtnet_rq_free_unused_buf(vq, buf); } } From patchwork Wed Apr 6 03:43:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803310 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 7DCB2C43217 for ; Wed, 6 Apr 2022 12:17:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232845AbiDFMS7 (ORCPT ); Wed, 6 Apr 2022 08:18:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36084 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233194AbiDFMSL (ORCPT ); Wed, 6 Apr 2022 08:18:11 -0400 Received: from out30-42.freemail.mail.aliyun.com (out30-42.freemail.mail.aliyun.com [115.124.30.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1D7B2963D1; Tue, 5 Apr 2022 20:45:01 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R101e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04426;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=34;SR=0;TI=SMTPD_---0V9KCOR._1649216693; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9KCOR._1649216693) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:54 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 31/32] virtio_net: support rx/tx queue resize Date: Wed, 6 Apr 2022 11:43:45 +0800 Message-Id: <20220406034346.74409-32-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This patch implements the resize function of the rx, tx queues. Based on this function, it is possible to modify the ring num of the queue. There may be an exception during the resize process, the resize may fail, or the vq can no longer be used. Either way, we must execute napi_enable(). Because napi_disable is similar to a lock, napi_enable must be called after calling napi_disable. Signed-off-by: Xuan Zhuo --- drivers/net/virtio_net.c | 81 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index b8bf00525177..ba6859f305f7 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -251,6 +251,9 @@ struct padded_vnet_hdr { char padding[4]; }; +static void virtnet_sq_free_unused_buf(struct virtqueue *vq, void *buf); +static void virtnet_rq_free_unused_buf(struct virtqueue *vq, void *buf); + static bool is_xdp_frame(void *ptr) { return (unsigned long)ptr & VIRTIO_XDP_FLAG; @@ -1369,6 +1372,15 @@ static void virtnet_napi_enable(struct virtqueue *vq, struct napi_struct *napi) { napi_enable(napi); + /* Check if vq is in reset state. The normal reset/resize process will + * be protected by napi. However, the protection of napi is only enabled + * during the operation, and the protection of napi will end after the + * operation is completed. If re-enable fails during the process, vq + * will remain unavailable with reset state. + */ + if (vq->reset) + return; + /* If all buffers were filled by other side before we napi_enabled, we * won't get another interrupt, so process any outstanding packets now. * Call local_bh_enable after to trigger softIRQ processing. @@ -1413,6 +1425,15 @@ static void refill_work(struct work_struct *work) struct receive_queue *rq = &vi->rq[i]; napi_disable(&rq->napi); + + /* Check if vq is in reset state. See more in + * virtnet_napi_enable() + */ + if (rq->vq->reset) { + virtnet_napi_enable(rq->vq, &rq->napi); + continue; + } + still_empty = !try_fill_recv(vi, rq, GFP_KERNEL); virtnet_napi_enable(rq->vq, &rq->napi); @@ -1523,6 +1544,10 @@ static void virtnet_poll_cleantx(struct receive_queue *rq) if (!sq->napi.weight || is_xdp_raw_buffer_queue(vi, index)) return; + /* Check if vq is in reset state. See more in virtnet_napi_enable() */ + if (sq->vq->reset) + return; + if (__netif_tx_trylock(txq)) { do { virtqueue_disable_cb(sq->vq); @@ -1769,6 +1794,62 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_OK; } +static int virtnet_rx_resize(struct virtnet_info *vi, + struct receive_queue *rq, u32 ring_num) +{ + int err; + + napi_disable(&rq->napi); + + err = virtqueue_resize(rq->vq, ring_num, virtnet_rq_free_unused_buf); + if (err) + goto err; + + if (!try_fill_recv(vi, rq, GFP_KERNEL)) + schedule_delayed_work(&vi->refill, 0); + + virtnet_napi_enable(rq->vq, &rq->napi); + return 0; + +err: + netdev_err(vi->dev, + "reset rx reset vq fail: rx queue index: %td err: %d\n", + rq - vi->rq, err); + virtnet_napi_enable(rq->vq, &rq->napi); + return err; +} + +static int virtnet_tx_resize(struct virtnet_info *vi, + struct send_queue *sq, u32 ring_num) +{ + struct netdev_queue *txq; + int err, qindex; + + qindex = sq - vi->sq; + + virtnet_napi_tx_disable(&sq->napi); + + txq = netdev_get_tx_queue(vi->dev, qindex); + __netif_tx_lock_bh(txq); + netif_stop_subqueue(vi->dev, qindex); + __netif_tx_unlock_bh(txq); + + err = virtqueue_resize(sq->vq, ring_num, virtnet_sq_free_unused_buf); + if (err) + goto err; + + netif_start_subqueue(vi->dev, qindex); + virtnet_napi_tx_enable(vi, sq->vq, &sq->napi); + return 0; + +err: + netdev_err(vi->dev, + "reset tx reset vq fail: tx queue index: %td err: %d\n", + sq - vi->sq, err); + virtnet_napi_tx_enable(vi, sq->vq, &sq->napi); + return err; +} + /* * Send command via the control virtqueue and check status. Commands * supported by the hypervisor, as indicated by feature bits, should From patchwork Wed Apr 6 03:43:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12803406 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 96D36C4321E for ; Wed, 6 Apr 2022 13:12:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232576AbiDFNOz (ORCPT ); Wed, 6 Apr 2022 09:14:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43982 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233018AbiDFNNz (ORCPT ); Wed, 6 Apr 2022 09:13:55 -0400 Received: from out30-56.freemail.mail.aliyun.com (out30-56.freemail.mail.aliyun.com [115.124.30.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B541E2963E6; Tue, 5 Apr 2022 20:45:02 -0700 (PDT) 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=34;SR=0;TI=SMTPD_---0V9Jzj-E_1649216695; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V9Jzj-E_1649216695) by smtp.aliyun-inc.com(127.0.0.1); Wed, 06 Apr 2022 11:44:57 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , 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 Subject: [PATCH v9 32/32] virtio_net: support set_ringparam Date: Wed, 6 Apr 2022 11:43:46 +0800 Message-Id: <20220406034346.74409-33-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 881cb3483d12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Support set_ringparam based on virtio queue reset. Users can use ethtool -G eth0 to modify the ring size of virtio-net. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/net/virtio_net.c | 47 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index ba6859f305f7..37e4e27f1e4e 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2264,6 +2264,52 @@ static void virtnet_get_ringparam(struct net_device *dev, ring->tx_pending = virtqueue_get_vring_size(vi->sq[0].vq); } +static int virtnet_set_ringparam(struct net_device *dev, + struct ethtool_ringparam *ring, + struct kernel_ethtool_ringparam *kernel_ring, + struct netlink_ext_ack *extack) +{ + struct virtnet_info *vi = netdev_priv(dev); + u32 rx_pending, tx_pending; + struct receive_queue *rq; + struct send_queue *sq; + int i, err; + + if (ring->rx_mini_pending || ring->rx_jumbo_pending) + return -EINVAL; + + rx_pending = virtqueue_get_vring_size(vi->rq[0].vq); + tx_pending = virtqueue_get_vring_size(vi->sq[0].vq); + + if (ring->rx_pending == rx_pending && + ring->tx_pending == tx_pending) + return 0; + + if (ring->rx_pending > virtqueue_get_vring_max_size(vi->rq[0].vq)) + return -EINVAL; + + if (ring->tx_pending > virtqueue_get_vring_max_size(vi->sq[0].vq)) + return -EINVAL; + + for (i = 0; i < vi->max_queue_pairs; i++) { + rq = vi->rq + i; + sq = vi->sq + i; + + if (ring->tx_pending != tx_pending) { + err = virtnet_tx_resize(vi, sq, ring->tx_pending); + if (err) + return err; + } + + if (ring->rx_pending != rx_pending) { + err = virtnet_rx_resize(vi, rq, ring->rx_pending); + if (err) + return err; + } + } + + return 0; +} static void virtnet_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) @@ -2497,6 +2543,7 @@ static const struct ethtool_ops virtnet_ethtool_ops = { .get_drvinfo = virtnet_get_drvinfo, .get_link = ethtool_op_get_link, .get_ringparam = virtnet_get_ringparam, + .set_ringparam = virtnet_set_ringparam, .get_strings = virtnet_get_strings, .get_sset_count = virtnet_get_sset_count, .get_ethtool_stats = virtnet_get_ethtool_stats,