From patchwork Thu Jul 29 07:34:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yongji Xie X-Patchwork-Id: 12407961 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9E66CC4338F for ; Thu, 29 Jul 2021 07:36:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F2A360F02 for ; Thu, 29 Jul 2021 07:36:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235170AbhG2HhA (ORCPT ); Thu, 29 Jul 2021 03:37:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235162AbhG2Hgq (ORCPT ); Thu, 29 Jul 2021 03:36:46 -0400 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E6E7C061381 for ; Thu, 29 Jul 2021 00:36:40 -0700 (PDT) Received: by mail-pj1-x1034.google.com with SMTP id k4-20020a17090a5144b02901731c776526so14234212pjm.4 for ; Thu, 29 Jul 2021 00:36:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=t/Mv+HEad+Mm0KXM51+RZNvY/SJHCBiAHseh+BVH8NU=; b=m90svpJzE0nzBWjlFAdvM3aAFHtWP/DlxqcYbayFc782jYlMWShvCEVJ0CTahZE/4c OFcZuIKMRY7g/484tMHPBybe/0F58rG2ian0mz6D2JwKCvUXXG0YIQIgDOENccOXypun 5n1IX472knippk8leuZrYqHK0NPdOkkBE9wzi/IOAvv/VaXFlofWyjGV7EAW2m1Cdjmc riCH1qwqxWeaz29T80miRK27dO8k6o3PtY2CGlFq/NE13QmSrReo7eR7gBPi8fS9c1P8 y351q7SiHU47741aY4t6v82hxTS7BcTp9jciEVxgSv8YcKn8TV94Lr6dI+nWRMf2NQCz 5x2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=t/Mv+HEad+Mm0KXM51+RZNvY/SJHCBiAHseh+BVH8NU=; b=pK/c5+plHXfpVkke8wjSRZXwBCnbR9+y9u88IrLUtI3E1wAunaMhvuPfBc6KHhysOL R4F6b5QXOwItThIQmpvKIL19VUKZ6S0/gS9ecUTQDZdlVzqaOfkIWZCyjnd2Hg6CxYxI qqlE6mNpbUhOvlWBJAqVaU2Cf7A0wNU7XdojfoNbB67HJT5tatxm9Xmxc9X2eWllNI+V cFgK60OKINq43ocST8JKLsSLmsV6f/kIOUuTI8T5wlONVlJKKiOTUF1UNCU2HKxXELP2 y3mfbUvtnIKLkZTxMMUv/3x8O9dPqiam+yUVtmvHglenJZP/PIMyr6lx0O96GrOHWJbQ +GIg== X-Gm-Message-State: AOAM531IMA/VP2XIbQ6bmA3NKiZIlD2UCziSODoMaGIOSHLvcnKNoNwa /5ezm+bNhkxfLh3golPS56hA X-Google-Smtp-Source: ABdhPJyhmuXfKE1NaeP74fAHMH1dtIHSozYXkqdngLO3jW1LBkz8W+OaQ0EIVcLXjVhhD5uH00JunQ== X-Received: by 2002:a17:902:e742:b029:12b:5431:24fe with SMTP id p2-20020a170902e742b029012b543124femr3584330plf.20.1627544199577; Thu, 29 Jul 2021 00:36:39 -0700 (PDT) Received: from localhost ([139.177.225.253]) by smtp.gmail.com with ESMTPSA id dw15sm2121343pjb.42.2021.07.29.00.36.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Jul 2021 00:36:39 -0700 (PDT) From: Xie Yongji To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, hch@infradead.org, christian.brauner@canonical.com, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net, mika.penttila@nextfour.com, dan.carpenter@oracle.com, joro@8bytes.org, gregkh@linuxfoundation.org, zhe.he@windriver.com, xiaodong.liu@intel.com, joe@perches.com Cc: songmuchun@bytedance.com, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-fsdevel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v10 08/17] virtio_config: Add a return value to reset function Date: Thu, 29 Jul 2021 15:34:54 +0800 Message-Id: <20210729073503.187-9-xieyongji@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210729073503.187-1-xieyongji@bytedance.com> References: <20210729073503.187-1-xieyongji@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This adds a return value to reset function so that we can handle the reset failure later. No functional changes. Signed-off-by: Xie Yongji --- arch/um/drivers/virtio_uml.c | 4 +++- drivers/platform/mellanox/mlxbf-tmfifo.c | 4 +++- drivers/remoteproc/remoteproc_virtio.c | 4 +++- drivers/s390/virtio/virtio_ccw.c | 6 ++++-- drivers/virtio/virtio_mmio.c | 4 +++- drivers/virtio/virtio_pci_legacy.c | 4 +++- drivers/virtio/virtio_pci_modern.c | 4 +++- drivers/virtio/virtio_vdpa.c | 4 +++- include/linux/virtio_config.h | 3 ++- 9 files changed, 27 insertions(+), 10 deletions(-) diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c index 4412d6febade..ca02deaf9b32 100644 --- a/arch/um/drivers/virtio_uml.c +++ b/arch/um/drivers/virtio_uml.c @@ -828,11 +828,13 @@ static void vu_set_status(struct virtio_device *vdev, u8 status) vu_dev->status = status; } -static void vu_reset(struct virtio_device *vdev) +static int vu_reset(struct virtio_device *vdev) { struct virtio_uml_device *vu_dev = to_virtio_uml_device(vdev); vu_dev->status = 0; + + return 0; } static void vu_del_vq(struct virtqueue *vq) diff --git a/drivers/platform/mellanox/mlxbf-tmfifo.c b/drivers/platform/mellanox/mlxbf-tmfifo.c index 38800e86ed8a..e3c513c2d4fa 100644 --- a/drivers/platform/mellanox/mlxbf-tmfifo.c +++ b/drivers/platform/mellanox/mlxbf-tmfifo.c @@ -989,11 +989,13 @@ static void mlxbf_tmfifo_virtio_set_status(struct virtio_device *vdev, } /* Reset the device. Not much here for now. */ -static void mlxbf_tmfifo_virtio_reset(struct virtio_device *vdev) +static int mlxbf_tmfifo_virtio_reset(struct virtio_device *vdev) { struct mlxbf_tmfifo_vdev *tm_vdev = mlxbf_vdev_to_tmfifo(vdev); tm_vdev->status = 0; + + return 0; } /* Read the value of a configuration field. */ diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c index cf4d54e98e6a..975c845b3187 100644 --- a/drivers/remoteproc/remoteproc_virtio.c +++ b/drivers/remoteproc/remoteproc_virtio.c @@ -191,7 +191,7 @@ static void rproc_virtio_set_status(struct virtio_device *vdev, u8 status) dev_dbg(&vdev->dev, "status: %d\n", status); } -static void rproc_virtio_reset(struct virtio_device *vdev) +static int rproc_virtio_reset(struct virtio_device *vdev) { struct rproc_vdev *rvdev = vdev_to_rvdev(vdev); struct fw_rsc_vdev *rsc; @@ -200,6 +200,8 @@ static void rproc_virtio_reset(struct virtio_device *vdev) rsc->status = 0; dev_dbg(&vdev->dev, "reset !\n"); + + return 0; } /* provide the vdev features as retrieved from the firmware */ diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c index d35e7a3f7067..5221cdad531d 100644 --- a/drivers/s390/virtio/virtio_ccw.c +++ b/drivers/s390/virtio/virtio_ccw.c @@ -710,14 +710,14 @@ static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs, return ret; } -static void virtio_ccw_reset(struct virtio_device *vdev) +static int virtio_ccw_reset(struct virtio_device *vdev) { struct virtio_ccw_device *vcdev = to_vc_device(vdev); struct ccw1 *ccw; ccw = ccw_device_dma_zalloc(vcdev->cdev, sizeof(*ccw)); if (!ccw) - return; + return -ENOMEM; /* Zero status bits. */ vcdev->dma_area->status = 0; @@ -729,6 +729,8 @@ static void virtio_ccw_reset(struct virtio_device *vdev) ccw->cda = 0; ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_RESET); ccw_device_dma_free(vcdev->cdev, ccw, sizeof(*ccw)); + + return 0; } static u64 virtio_ccw_get_features(struct virtio_device *vdev) diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c index 56128b9c46eb..c0a65efa4a65 100644 --- a/drivers/virtio/virtio_mmio.c +++ b/drivers/virtio/virtio_mmio.c @@ -256,12 +256,14 @@ static void vm_set_status(struct virtio_device *vdev, u8 status) writel(status, vm_dev->base + VIRTIO_MMIO_STATUS); } -static void vm_reset(struct virtio_device *vdev) +static int vm_reset(struct virtio_device *vdev) { struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev); /* 0 status means a reset. */ writel(0, vm_dev->base + VIRTIO_MMIO_STATUS); + + return 0; } diff --git a/drivers/virtio/virtio_pci_legacy.c b/drivers/virtio/virtio_pci_legacy.c index d62e9835aeec..0b5d95e3efa1 100644 --- a/drivers/virtio/virtio_pci_legacy.c +++ b/drivers/virtio/virtio_pci_legacy.c @@ -89,7 +89,7 @@ static void vp_set_status(struct virtio_device *vdev, u8 status) iowrite8(status, vp_dev->ioaddr + VIRTIO_PCI_STATUS); } -static void vp_reset(struct virtio_device *vdev) +static int vp_reset(struct virtio_device *vdev) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); /* 0 status means a reset. */ @@ -99,6 +99,8 @@ static void vp_reset(struct virtio_device *vdev) ioread8(vp_dev->ioaddr + VIRTIO_PCI_STATUS); /* Flush pending VQ/configuration callbacks. */ vp_synchronize_vectors(vdev); + + return 0; } static u16 vp_config_vector(struct virtio_pci_device *vp_dev, u16 vector) diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index 30654d3a0b41..b0cde3b2f0ff 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -158,7 +158,7 @@ static void vp_set_status(struct virtio_device *vdev, u8 status) vp_modern_set_status(&vp_dev->mdev, status); } -static void vp_reset(struct virtio_device *vdev) +static int vp_reset(struct virtio_device *vdev) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); struct virtio_pci_modern_device *mdev = &vp_dev->mdev; @@ -174,6 +174,8 @@ static void vp_reset(struct virtio_device *vdev) msleep(1); /* Flush pending VQ/configuration callbacks. */ vp_synchronize_vectors(vdev); + + return 0; } static u16 vp_config_vector(struct virtio_pci_device *vp_dev, u16 vector) diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index ff43f9b62b2f..3e666f70e829 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -97,11 +97,13 @@ static void virtio_vdpa_set_status(struct virtio_device *vdev, u8 status) return ops->set_status(vdpa, status); } -static void virtio_vdpa_reset(struct virtio_device *vdev) +static int virtio_vdpa_reset(struct virtio_device *vdev) { struct vdpa_device *vdpa = vd_get_vdpa(vdev); vdpa_reset(vdpa); + + return 0; } static bool virtio_vdpa_notify(struct virtqueue *vq) diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 8519b3ae5d52..203407992c30 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -47,6 +47,7 @@ struct virtio_shm_region { * After this, status and feature negotiation must be done again * Device must not be reset from its vq/config callbacks, or in * parallel with being added/removed. + * Returns 0 on success or error status * @find_vqs: find virtqueues and instantiate them. * vdev: the virtio_device * nvqs: the number of virtqueues to find @@ -82,7 +83,7 @@ struct virtio_config_ops { u32 (*generation)(struct virtio_device *vdev); u8 (*get_status)(struct virtio_device *vdev); void (*set_status)(struct virtio_device *vdev, u8 status); - void (*reset)(struct virtio_device *vdev); + int (*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,