linux-kernel - [PATCH 2/5] VFIO: platform: add get

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Date:	Thu,  7 May 2015 16:27:20 +0200
From:	Eric Auger <eric.auger@...aro.org>
To:	eric.auger@...com, eric.auger@...aro.org,
	christoffer.dall@...aro.org, linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.cs.columbia.edu, kvm@...r.kernel.org,
	alex.williamson@...hat.com, b.reynal@...tualopensystems.com
Cc:	linux-kernel@...r.kernel.org, patches@...aro.org, agraf@...e.de,
	Bharat.Bhushan@...escale.com
Subject: [PATCH 2/5] VFIO: platform: add get_device callback

It is needed to introduce a new callback enabling to retrieve the
struct device* from the vfio_platform_device. Implementation depends
on the underlying device, platform or amba. This will be used to retrieve
the compatibility string of the device.

Signed-off-by: Eric Auger <eric.auger@...aro.org>
---
 drivers/vfio/platform/vfio_amba.c             |  9 +++++++++
 drivers/vfio/platform/vfio_platform.c         | 10 ++++++++++
 drivers/vfio/platform/vfio_platform_private.h |  1 +
 3 files changed, 20 insertions(+)

diff --git a/drivers/vfio/platform/vfio_amba.c b/drivers/vfio/platform/vfio_amba.c
index ff0331f..fd68115 100644
--- a/drivers/vfio/platform/vfio_amba.c
+++ b/drivers/vfio/platform/vfio_amba.c
@@ -48,6 +48,14 @@ static int get_amba_irq(struct vfio_platform_device *vdev, int i)
 	return ret ? ret : -ENXIO;
 }
 
+static struct device *vfio_amba_get_device(struct vfio_platform_device *vdev)
+{
+	struct amba_device *pdev = (struct amba_device *) vdev->opaque;
+	struct device *dev = &pdev->dev;
+
+	return dev;
+}
+
 static int vfio_amba_probe(struct amba_device *adev, const struct amba_id *id)
 {
 	struct vfio_platform_device *vdev;
@@ -67,6 +75,7 @@ static int vfio_amba_probe(struct amba_device *adev, const struct amba_id *id)
 	vdev->flags = VFIO_DEVICE_FLAGS_AMBA;
 	vdev->get_resource = get_amba_resource;
 	vdev->get_irq = get_amba_irq;
+	vdev->get_device = vfio_amba_get_device;
 
 	ret = vfio_platform_probe_common(vdev, &adev->dev);
 	if (ret) {
diff --git a/drivers/vfio/platform/vfio_platform.c b/drivers/vfio/platform/vfio_platform.c
index cef645c..c025d76 100644
--- a/drivers/vfio/platform/vfio_platform.c
+++ b/drivers/vfio/platform/vfio_platform.c
@@ -51,6 +51,15 @@ static int get_platform_irq(struct vfio_platform_device *vdev, int i)
 	return platform_get_irq(pdev, i);
 }
 
+static struct device *vfio_platform_get_device(
+				struct vfio_platform_device *vdev)
+{
+	struct platform_device *pdev = (struct platform_device *) vdev->opaque;
+	struct device *dev = &pdev->dev;
+
+	return dev;
+}
+
 static int vfio_platform_probe(struct platform_device *pdev)
 {
 	struct vfio_platform_device *vdev;
@@ -65,6 +74,7 @@ static int vfio_platform_probe(struct platform_device *pdev)
 	vdev->flags = VFIO_DEVICE_FLAGS_PLATFORM;
 	vdev->get_resource = get_platform_resource;
 	vdev->get_irq = get_platform_irq;
+	vdev->get_device = vfio_platform_get_device;
 
 	ret = vfio_platform_probe_common(vdev, &pdev->dev);
 	if (ret)
diff --git a/drivers/vfio/platform/vfio_platform_private.h b/drivers/vfio/platform/vfio_platform_private.h
index da2d60b..68909a4 100644
--- a/drivers/vfio/platform/vfio_platform_private.h
+++ b/drivers/vfio/platform/vfio_platform_private.h
@@ -67,6 +67,7 @@ struct vfio_platform_device {
 	struct resource*
 		(*get_resource)(struct vfio_platform_device *vdev, int i);
 	int	(*get_irq)(struct vfio_platform_device *vdev, int i);
+	struct device *(*get_device)(struct vfio_platform_device *vdev);
 };
 
 typedef int (*vfio_platform_reset_fn_t)(struct vfio_platform_device *vdev);
-- 
1.9.1

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