From patchwork Mon Aug 15 21:53:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Michael S. Tsirkin" X-Patchwork-Id: 12944210 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 7777AC00140 for ; Tue, 16 Aug 2022 02:03:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231786AbiHPCDS (ORCPT ); Mon, 15 Aug 2022 22:03:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233699AbiHPCB6 (ORCPT ); Mon, 15 Aug 2022 22:01:58 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id F19CF221113 for ; Mon, 15 Aug 2022 14:54:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1660600442; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=7KUDnR7ITSXzGuGHvfD+T/glFccQWZ3L+AQhNkH7LGU=; b=Yi3WHG2wuBGf6wBfUgdKG1oHb0ID9MUJ8nNBgBF6lVqzUXw8WqLFqGnPCR5At2QY5n9tvB M5Tmv1WQg6wVZh+yP8S0pxOTgAlnb6jsWBU2GfbAW6iSnwFg3jFTYyZbLBpRwzgG/sTHib 9wtfsJv8kL8gj2qvDda3ksvKs6TRTtQ= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-36-mY0Z_Ei6Pb2Y5iEnLqiumw-1; Mon, 15 Aug 2022 17:53:52 -0400 X-MC-Unique: mY0Z_Ei6Pb2Y5iEnLqiumw-1 Received: by mail-wm1-f72.google.com with SMTP id 133-20020a1c028b000000b003a5f307844bso1298477wmc.2 for ; Mon, 15 Aug 2022 14:53:52 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc; bh=7KUDnR7ITSXzGuGHvfD+T/glFccQWZ3L+AQhNkH7LGU=; b=va07TDcjVAv9coA4624DrFgxPepWnv8h6bBczI75LOXFzJ3ZbAXva7uibvaYgU+sTp sCpvNMVatmLBy23w9hHfoOoTB9/AKcF8ul4KtS8d6d/O1pTme1ZfgSO0/Os9ccdRwoZ+ 1mQ1aQjxRKF5gIkF/3wpEKFpyOK24RP0/VbLI5H4WFl+QCWxj31VGeCwxrTjgReC+PFr O0lQ0ULNk/TP0rNGErjtyDNJTX3vFGBJpHKivluLGjwCz6hboijya5BV5zZlsrRcmF5z gosz7VuyV1U51g68k8tSBWrFbc9zUfobQ3dJE3Ka/IM84gTv5VzYCcNXMDWYsd/oO8Tt 6bqw== X-Gm-Message-State: ACgBeo3yQ9i7JYQC3sIcrFQMCkppvQbLcPvKnm5Olw3Db8WCa/F1ByZi DNpLBRuJ57VMUwiFHcDmcPlED+gYgKChmKB3mi9gcZE9QFI91xQJ86SfOMZ09NlfJ7yruKqFAvj IJvSLBMZ/1PWRqp6V X-Received: by 2002:a05:600c:350:b0:3a5:3473:1c23 with SMTP id u16-20020a05600c035000b003a534731c23mr11674292wmd.9.1660600430087; Mon, 15 Aug 2022 14:53:50 -0700 (PDT) X-Google-Smtp-Source: AA6agR53rMzE4U5pnUK7BCCMlD2tXkJnPNsZxIff5xbTlNR7OU7KWTxyNA44s3F5a7zCujaD/ntPbw== X-Received: by 2002:a05:600c:350:b0:3a5:3473:1c23 with SMTP id u16-20020a05600c035000b003a534731c23mr11674278wmd.9.1660600429861; Mon, 15 Aug 2022 14:53:49 -0700 (PDT) Received: from redhat.com ([2.55.4.37]) by smtp.gmail.com with ESMTPSA id z1-20020adfec81000000b0021e51c039c5sm8409417wrn.80.2022.08.15.14.53.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Aug 2022 14:53:49 -0700 (PDT) Date: Mon, 15 Aug 2022 17:53:46 -0400 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: Xuan Zhuo , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, Linus Torvalds , Jens Axboe , James Bottomley , "Martin K. Petersen" , Guenter Roeck , Greg KH , Andres Freund Subject: [PATCH v2 4/5] virtio_pci: Revert "virtio_pci: support the arg sizes of find_vqs()" Message-ID: <20220815215251.154451-7-mst@redhat.com> References: <20220815215251.154451-1-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220815215251.154451-1-mst@redhat.com> X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This reverts commit cdb44806fca2d0ad29ca644cbf1505433902ee0c: the legacy path is wrong and in fact can not support the proposed API since for a legacy device we never communicate the vq size to the hypervisor. Reported-by: Andres Freund Fixes: cdb44806fca2 ("virtio_pci: support the arg sizes of find_vqs()") Signed-off-by: Michael S. Tsirkin --- 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, 12 insertions(+), 23 deletions(-) diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index 00ad476a815d..7ad734584823 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -174,7 +174,6 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned int index, void (*callback)(struct virtqueue *vq), const char *name, - u32 size, bool ctx, u16 msix_vec) { @@ -187,7 +186,7 @@ static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned int in if (!info) return ERR_PTR(-ENOMEM); - vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, size, ctx, + vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, ctx, msix_vec); if (IS_ERR(vq)) goto out_info; @@ -284,7 +283,7 @@ void vp_del_vqs(struct virtio_device *vdev) static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], u32 sizes[], bool per_vq_vectors, + const char * const names[], bool per_vq_vectors, const bool *ctx, struct irq_affinity *desc) { @@ -327,8 +326,8 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs, else msix_vec = VP_MSIX_VQ_VECTOR; vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i], - sizes ? sizes[i] : 0, - ctx ? ctx[i] : false, msix_vec); + ctx ? ctx[i] : false, + msix_vec); if (IS_ERR(vqs[i])) { err = PTR_ERR(vqs[i]); goto error_find; @@ -358,7 +357,7 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs, static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned int nvqs, struct virtqueue *vqs[], vq_callback_t *callbacks[], - const char * const names[], u32 sizes[], const bool *ctx) + const char * const names[], const bool *ctx) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); int i, err, queue_idx = 0; @@ -380,7 +379,6 @@ static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned int 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])) { @@ -404,15 +402,15 @@ int vp_find_vqs(struct virtio_device *vdev, unsigned int nvqs, int err; /* Try MSI-X with one vector per queue. */ - err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, sizes, true, ctx, desc); + err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, 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, sizes, false, ctx, desc); + err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, false, ctx, desc); if (!err) return 0; /* Finally fall back to regular interrupts. */ - return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names, sizes, ctx); + return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names, 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 c0448378b698..a5ff838b85a5 100644 --- a/drivers/virtio/virtio_pci_common.h +++ b/drivers/virtio/virtio_pci_common.h @@ -80,7 +80,6 @@ struct virtio_pci_device { unsigned int 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 d75e5c4e637f..2257f1b3d8ae 100644 --- a/drivers/virtio/virtio_pci_legacy.c +++ b/drivers/virtio/virtio_pci_legacy.c @@ -112,7 +112,6 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, unsigned int index, void (*callback)(struct virtqueue *vq), const char *name, - u32 size, bool ctx, u16 msix_vec) { @@ -126,13 +125,10 @@ 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, size, + vq = vring_create_virtqueue(index, num, 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 f7965c5dd36b..be51ec849252 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -293,7 +293,6 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, unsigned int index, void (*callback)(struct virtqueue *vq), const char *name, - u32 size, bool ctx, u16 msix_vec) { @@ -311,18 +310,15 @@ 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 (!size || size > num) - size = num; - - if (size & (size - 1)) { - dev_warn(&vp_dev->pci_dev->dev, "bad queue size %u", size); + if (num & (num - 1)) { + dev_warn(&vp_dev->pci_dev->dev, "bad queue size %u", num); return ERR_PTR(-EINVAL); } info->msix_vector = msix_vec; /* create the vring */ - vq = vring_create_virtqueue(index, size, + vq = vring_create_virtqueue(index, num, SMP_CACHE_BYTES, &vp_dev->vdev, true, true, ctx, vp_notify, callback, name);