From patchwork Tue Mar 8 12:35:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12773642 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67042C4332F for ; Tue, 8 Mar 2022 12:38:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347001AbiCHMjR (ORCPT ); Tue, 8 Mar 2022 07:39:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235447AbiCHMhV (ORCPT ); Tue, 8 Mar 2022 07:37:21 -0500 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 A98C448327; Tue, 8 Mar 2022 04:36:06 -0800 (PST) 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_---0V6eTXfL_1646742959; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V6eTXfL_1646742959) by smtp.aliyun-inc.com(127.0.0.1); Tue, 08 Mar 2022 20:36:01 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org, netdev@vger.kernel.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 , Vincent Whitchurch , Xuan Zhuo , linux-um@lists.infradead.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 v7 19/26] virtio_pci: support the arg sizes of find_vqs() Date: Tue, 8 Mar 2022 20:35:11 +0800 Message-Id: <20220308123518.33800-20-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220308123518.33800-1-xuanzhuo@linux.alibaba.com> References: <20220308123518.33800-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: f06b131dbfed Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Virtio PCI supports new parameter sizes of find_vqs(). Signed-off-by: Xuan Zhuo --- 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 8e8fa7e5ad80..1faf65325060 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) { @@ -221,7 +222,7 @@ static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned index, return ERR_PTR(-ENOMEM); vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, ctx, - msix_vec); + size, 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 9dbf1d555dff..a15ac5570ddd 100644 --- a/drivers/virtio/virtio_pci_common.h +++ b/drivers/virtio/virtio_pci_common.h @@ -82,6 +82,7 @@ struct virtio_pci_device { void (*callback)(struct virtqueue *vq), const char *name, bool ctx, + u32 size, 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..efa98d2debe0 100644 --- a/drivers/virtio/virtio_pci_legacy.c +++ b/drivers/virtio/virtio_pci_legacy.c @@ -113,6 +113,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, void (*callback)(struct virtqueue *vq), const char *name, bool ctx, + u32 size, u16 msix_vec) { struct virtqueue *vq; @@ -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 342795175c29..0e17e0df6a8a 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, void (*callback)(struct virtqueue *vq), const char *name, bool ctx, + u32 size, u16 msix_vec) { @@ -305,15 +306,18 @@ 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);