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From: Jason Gunthorpe <jgg@nvidia.com>
To: Alex Williamson <alex.williamson@redhat.com>, kvm@vger.kernel.org
Cc: "Raj, Ashok" <ashok.raj@intel.com>,
	Cornelia Huck <cohuck@redhat.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Daniel Vetter <daniel@ffwll.ch>,
	Eric Auger <eric.auger@redhat.com>,
	Christoph Hellwig <hch@lst.de>,
	Leon Romanovsky <leonro@nvidia.com>,
	Max Gurtovoy <mgurtovoy@nvidia.com>,
	Tarun Gupta <targupta@nvidia.com>
Subject: [PATCH v3 04/14] vfio/platform: Use vfio_init/register/unregister_group_dev
Date: Tue, 23 Mar 2021 13:14:56 -0300	[thread overview]
Message-ID: <4-v3-225de1400dfc+4e074-vfio1_jgg@nvidia.com> (raw)
In-Reply-To: <0-v3-225de1400dfc+4e074-vfio1_jgg@nvidia.com>

platform already allocates a struct vfio_platform_device with exactly
the same lifetime as vfio_device, switch to the new API and embed
vfio_device in vfio_platform_device.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/vfio/platform/vfio_amba.c             |  8 ++++---
 drivers/vfio/platform/vfio_platform.c         | 20 ++++++++--------
 drivers/vfio/platform/vfio_platform_common.c  | 23 +++++++------------
 drivers/vfio/platform/vfio_platform_private.h |  5 ++--
 4 files changed, 25 insertions(+), 31 deletions(-)

diff --git a/drivers/vfio/platform/vfio_amba.c b/drivers/vfio/platform/vfio_amba.c
index 3626c21501017e..f970eb2a999f29 100644
--- a/drivers/vfio/platform/vfio_amba.c
+++ b/drivers/vfio/platform/vfio_amba.c
@@ -66,16 +66,18 @@ static int vfio_amba_probe(struct amba_device *adev, const struct amba_id *id)
 	if (ret) {
 		kfree(vdev->name);
 		kfree(vdev);
+		return ret;
 	}
 
-	return ret;
+	dev_set_drvdata(&adev->dev, vdev);
+	return 0;
 }
 
 static void vfio_amba_remove(struct amba_device *adev)
 {
-	struct vfio_platform_device *vdev =
-		vfio_platform_remove_common(&adev->dev);
+	struct vfio_platform_device *vdev = dev_get_drvdata(&adev->dev);
 
+	vfio_platform_remove_common(vdev);
 	kfree(vdev->name);
 	kfree(vdev);
 }
diff --git a/drivers/vfio/platform/vfio_platform.c b/drivers/vfio/platform/vfio_platform.c
index 9fb6818cea12cb..e4027799a154ff 100644
--- a/drivers/vfio/platform/vfio_platform.c
+++ b/drivers/vfio/platform/vfio_platform.c
@@ -54,23 +54,21 @@ static int vfio_platform_probe(struct platform_device *pdev)
 	vdev->reset_required = reset_required;
 
 	ret = vfio_platform_probe_common(vdev, &pdev->dev);
-	if (ret)
+	if (ret) {
 		kfree(vdev);
-
-	return ret;
+		return ret;
+	}
+	dev_set_drvdata(&pdev->dev, vdev);
+	return 0;
 }
 
 static int vfio_platform_remove(struct platform_device *pdev)
 {
-	struct vfio_platform_device *vdev;
-
-	vdev = vfio_platform_remove_common(&pdev->dev);
-	if (vdev) {
-		kfree(vdev);
-		return 0;
-	}
+	struct vfio_platform_device *vdev = dev_get_drvdata(&pdev->dev);
 
-	return -EINVAL;
+	vfio_platform_remove_common(vdev);
+	kfree(vdev);
+	return 0;
 }
 
 static struct platform_driver vfio_platform_driver = {
diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
index fb4b385191f288..6eb749250ee41c 100644
--- a/drivers/vfio/platform/vfio_platform_common.c
+++ b/drivers/vfio/platform/vfio_platform_common.c
@@ -659,8 +659,7 @@ int vfio_platform_probe_common(struct vfio_platform_device *vdev,
 	struct iommu_group *group;
 	int ret;
 
-	if (!vdev)
-		return -EINVAL;
+	vfio_init_group_dev(&vdev->vdev, dev, &vfio_platform_ops, vdev);
 
 	ret = vfio_platform_acpi_probe(vdev, dev);
 	if (ret)
@@ -685,13 +684,13 @@ int vfio_platform_probe_common(struct vfio_platform_device *vdev,
 		goto put_reset;
 	}
 
-	ret = vfio_add_group_dev(dev, &vfio_platform_ops, vdev);
+	ret = vfio_register_group_dev(&vdev->vdev);
 	if (ret)
 		goto put_iommu;
 
 	mutex_init(&vdev->igate);
 
-	pm_runtime_enable(vdev->device);
+	pm_runtime_enable(dev);
 	return 0;
 
 put_iommu:
@@ -702,19 +701,13 @@ int vfio_platform_probe_common(struct vfio_platform_device *vdev,
 }
 EXPORT_SYMBOL_GPL(vfio_platform_probe_common);
 
-struct vfio_platform_device *vfio_platform_remove_common(struct device *dev)
+void vfio_platform_remove_common(struct vfio_platform_device *vdev)
 {
-	struct vfio_platform_device *vdev;
-
-	vdev = vfio_del_group_dev(dev);
+	vfio_unregister_group_dev(&vdev->vdev);
 
-	if (vdev) {
-		pm_runtime_disable(vdev->device);
-		vfio_platform_put_reset(vdev);
-		vfio_iommu_group_put(dev->iommu_group, dev);
-	}
-
-	return vdev;
+	pm_runtime_disable(vdev->device);
+	vfio_platform_put_reset(vdev);
+	vfio_iommu_group_put(vdev->vdev.dev->iommu_group, vdev->vdev.dev);
 }
 EXPORT_SYMBOL_GPL(vfio_platform_remove_common);
 
diff --git a/drivers/vfio/platform/vfio_platform_private.h b/drivers/vfio/platform/vfio_platform_private.h
index 289089910643ac..a5ba82c8cbc354 100644
--- a/drivers/vfio/platform/vfio_platform_private.h
+++ b/drivers/vfio/platform/vfio_platform_private.h
@@ -9,6 +9,7 @@
 
 #include <linux/types.h>
 #include <linux/interrupt.h>
+#include <linux/vfio.h>
 
 #define VFIO_PLATFORM_OFFSET_SHIFT   40
 #define VFIO_PLATFORM_OFFSET_MASK (((u64)(1) << VFIO_PLATFORM_OFFSET_SHIFT) - 1)
@@ -42,6 +43,7 @@ struct vfio_platform_region {
 };
 
 struct vfio_platform_device {
+	struct vfio_device		vdev;
 	struct vfio_platform_region	*regions;
 	u32				num_regions;
 	struct vfio_platform_irq	*irqs;
@@ -80,8 +82,7 @@ struct vfio_platform_reset_node {
 
 extern int vfio_platform_probe_common(struct vfio_platform_device *vdev,
 				      struct device *dev);
-extern struct vfio_platform_device *vfio_platform_remove_common
-				     (struct device *dev);
+void vfio_platform_remove_common(struct vfio_platform_device *vdev);
 
 extern int vfio_platform_irq_init(struct vfio_platform_device *vdev);
 extern void vfio_platform_irq_cleanup(struct vfio_platform_device *vdev);
-- 
2.31.0


  parent reply	other threads:[~2021-03-23 16:16 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-23 16:14 [PATCH v3 00/14] Embed struct vfio_device in all sub-structures Jason Gunthorpe
2021-03-23 16:14 ` [PATCH v3 01/14] vfio: Remove extra put/gets around vfio_device->group Jason Gunthorpe
2021-03-23 16:14 ` [PATCH v3 02/14] vfio: Simplify the lifetime logic for vfio_device Jason Gunthorpe
2021-03-23 16:14 ` [PATCH v3 03/14] vfio: Split creation of a vfio_device into init and register ops Jason Gunthorpe
2021-03-23 16:14 ` Jason Gunthorpe [this message]
2021-03-23 16:14 ` [PATCH v3 05/14] vfio/fsl-mc: Re-order vfio_fsl_mc_probe() Jason Gunthorpe
2021-03-26 16:54   ` Diana Craciun OSS
2021-03-23 16:14 ` [PATCH v3 06/14] vfio/fsl-mc: Use vfio_init/register/unregister_group_dev Jason Gunthorpe
2021-03-23 16:14 ` [PATCH v3 07/14] vfio/pci: Move VGA and VF initialization to functions Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 08/14] vfio/pci: Re-order vfio_pci_probe() Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 09/14] vfio/pci: Use vfio_init/register/unregister_group_dev Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 10/14] vfio/mdev: " Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 11/14] vfio/mdev: Make to_mdev_device() into a static inline Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 12/14] vfio: Make vfio_device_ops pass a 'struct vfio_device *' instead of 'void *' Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 13/14] vfio/pci: Replace uses of vfio_device_data() with container_of Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 14/14] vfio: Remove device_data from the vfio bus driver API Jason Gunthorpe
2021-04-06 15:57 ` [PATCH v3 00/14] Embed struct vfio_device in all sub-structures Jason Gunthorpe
2021-04-06 19:38 ` Alex Williamson
2021-04-06 19:45   ` Jason Gunthorpe

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