From patchwork Sat Apr 1 15:18:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13197115 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0DAD4C77B6D for ; Sat, 1 Apr 2023 15:18:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6040A10E23B; Sat, 1 Apr 2023 15:18:58 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4A98B10E139; Sat, 1 Apr 2023 15:18:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1680362325; x=1711898325; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=jhycbiJB2gQIjPxNEaOUCxxLoPupQjQJSQK0WKWK3hQ=; b=TyN6UWl3XcVQ+199sHHZRF5Ht2vqBWc3dU8PnAVVjZt8tOCNgQdH1PGl E4IQLoCqVDg8tGgR+MzLOzm2k4sr8C50uMBhfDrSnppRvE0eH4R93e1J3 31weyeKHa4jSxT4jw7bWYdnL/sqfHs+uAXssO8Xj9VDGpbWU90JFP0UQo dvBt6CSldof1L7tH9sjLm3Y7LI49B/Udtr0W0/HWHa5EZJclC4ZZ8j3xM q0uLtOSZ6UnKAlffAVHgSe6EkcLe/g5k2KvXnVYRFNwNb/Q/rF6Y7DIvi b92o3PghO/yXjruEgE5ZZVtOMSqHXN1jULgTl5354yMuuqZDn8vmJ9JDi Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10667"; a="404411312" X-IronPort-AV: E=Sophos;i="5.98,310,1673942400"; d="scan'208";a="404411312" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Apr 2023 08:18:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10667"; a="678937205" X-IronPort-AV: E=Sophos;i="5.98,310,1673942400"; d="scan'208";a="678937205" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga007.jf.intel.com with ESMTP; 01 Apr 2023 08:18:43 -0700 From: Yi Liu To: alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com Date: Sat, 1 Apr 2023 08:18:22 -0700 Message-Id: <20230401151833.124749-15-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230401151833.124749-1-yi.l.liu@intel.com> References: <20230401151833.124749-1-yi.l.liu@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v9 14/25] vfio: Record devid in vfio_device_file X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mjrosato@linux.ibm.com, jasowang@redhat.com, xudong.hao@intel.com, peterx@redhat.com, terrence.xu@intel.com, chao.p.peng@linux.intel.com, linux-s390@vger.kernel.org, yi.l.liu@intel.com, kvm@vger.kernel.org, lulu@redhat.com, yanting.jiang@intel.com, joro@8bytes.org, nicolinc@nvidia.com, yan.y.zhao@intel.com, intel-gfx@lists.freedesktop.org, eric.auger@redhat.com, intel-gvt-dev@lists.freedesktop.org, yi.y.sun@linux.intel.com, cohuck@redhat.com, shameerali.kolothum.thodi@huawei.com, suravee.suthikulpanit@amd.com, robin.murphy@arm.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" .bind_iommufd() will generate an ID to represent this bond, which is needed by userspace for further usage. Store devid in vfio_device_file to avoid passing the pointer in multiple places. Reviewed-by: Kevin Tian Tested-by: Terrence Xu Tested-by: Nicolin Chen Tested-by: Yanting Jiang Signed-off-by: Yi Liu --- drivers/vfio/iommufd.c | 12 +++++++----- drivers/vfio/vfio.h | 10 +++++----- drivers/vfio/vfio_main.c | 6 +++--- 3 files changed, 15 insertions(+), 13 deletions(-) diff --git a/drivers/vfio/iommufd.c b/drivers/vfio/iommufd.c index 20fd250c247c..6ef9316a16a5 100644 --- a/drivers/vfio/iommufd.c +++ b/drivers/vfio/iommufd.c @@ -28,14 +28,14 @@ int vfio_iommufd_enable_noiommu_compat(struct vfio_device *device, return 0; } -int vfio_iommufd_bind(struct vfio_device *vdev, struct iommufd_ctx *ictx) +int vfio_iommufd_bind(struct vfio_device_file *df) { - u32 device_id; + struct vfio_device *vdev = df->device; + struct iommufd_ctx *ictx = df->iommufd; lockdep_assert_held(&vdev->dev_set->lock); - /* The legacy path has no way to return the device id */ - return vdev->ops->bind_iommufd(vdev, ictx, &device_id); + return vdev->ops->bind_iommufd(vdev, ictx, &df->devid); } int vfio_iommufd_attach_compat_ioas(struct vfio_device *vdev, @@ -54,8 +54,10 @@ int vfio_iommufd_attach_compat_ioas(struct vfio_device *vdev, return vdev->ops->attach_ioas(vdev, &ioas_id); } -void vfio_iommufd_unbind(struct vfio_device *vdev) +void vfio_iommufd_unbind(struct vfio_device_file *df) { + struct vfio_device *vdev = df->device; + lockdep_assert_held(&vdev->dev_set->lock); if (vdev->ops->unbind_iommufd) diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index abfaf85cc266..b47b186573ac 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -24,6 +24,7 @@ struct vfio_device_file { spinlock_t kvm_ref_lock; /* protect kvm field */ struct kvm *kvm; struct iommufd_ctx *iommufd; /* protected by struct vfio_device_set::lock */ + u32 devid; /* only valid when iommufd is valid */ }; void vfio_device_put_registration(struct vfio_device *device); @@ -240,8 +241,8 @@ int vfio_iommufd_enable_noiommu_compat(struct vfio_device *device, struct iommufd_ctx *ictx); int vfio_iommufd_attach_compat_ioas(struct vfio_device *device, struct iommufd_ctx *ictx); -int vfio_iommufd_bind(struct vfio_device *device, struct iommufd_ctx *ictx); -void vfio_iommufd_unbind(struct vfio_device *device); +int vfio_iommufd_bind(struct vfio_device_file *df); +void vfio_iommufd_unbind(struct vfio_device_file *df); #else static inline int vfio_iommufd_enable_noiommu_compat(struct vfio_device *device, @@ -257,13 +258,12 @@ vfio_iommufd_attach_compat_ioas(struct vfio_device *device, return -EOPNOTSUPP; } -static inline int vfio_iommufd_bind(struct vfio_device *device, - struct iommufd_ctx *ictx) +static inline int vfio_iommufd_bind(struct vfio_device_file *df) { return -EOPNOTSUPP; } -static inline void vfio_iommufd_unbind(struct vfio_device *device) +static inline void vfio_iommufd_unbind(struct vfio_device_file *df) { } #endif diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index f4c9c27c7d74..74da44973594 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -435,7 +435,7 @@ static int vfio_device_first_open(struct vfio_device_file *df) * noiommu mode then just go ahead to open it. */ if (iommufd) - ret = vfio_iommufd_bind(device, iommufd); + ret = vfio_iommufd_bind(df); else if (vfio_device_group_uses_container(df)) ret = vfio_device_group_use_iommu(device); if (ret) @@ -450,7 +450,7 @@ static int vfio_device_first_open(struct vfio_device_file *df) err_unuse_iommu: if (iommufd) - vfio_iommufd_unbind(device); + vfio_iommufd_unbind(df); else if (vfio_device_group_uses_container(df)) vfio_device_group_unuse_iommu(device); err_module_put: @@ -468,7 +468,7 @@ static void vfio_device_last_close(struct vfio_device_file *df) if (device->ops->close_device) device->ops->close_device(device); if (iommufd) - vfio_iommufd_unbind(device); + vfio_iommufd_unbind(df); else if (vfio_device_group_uses_container(df)) vfio_device_group_unuse_iommu(device); module_put(device->dev->driver->owner);