On Tue, 2014-09-23 at 16:46 +0200, Antonios Motakis wrote: > Driver to bind to Linux platform devices, and callbacks to discover their > resources to be used by the main VFIO PLATFORM code. > > Signed-off-by: Antonios Motakis <a.mota...@virtualopensystems.com> > --- > drivers/vfio/platform/vfio_platform.c | 96 > +++++++++++++++++++++++++++++++++++ > include/uapi/linux/vfio.h | 1 + > 2 files changed, 97 insertions(+) > create mode 100644 drivers/vfio/platform/vfio_platform.c > > diff --git a/drivers/vfio/platform/vfio_platform.c > b/drivers/vfio/platform/vfio_platform.c > new file mode 100644 > index 0000000..024c026 > --- /dev/null > +++ b/drivers/vfio/platform/vfio_platform.c > @@ -0,0 +1,96 @@ > +/* > + * Copyright (C) 2013 - Virtual Open Systems > + * Author: Antonios Motakis <a.mota...@virtualopensystems.com> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License, version 2, as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include <linux/device.h> > +#include <linux/eventfd.h> > +#include <linux/interrupt.h> > +#include <linux/iommu.h> > +#include <linux/module.h> > +#include <linux/mutex.h> > +#include <linux/notifier.h> > +#include <linux/pm_runtime.h> > +#include <linux/slab.h> > +#include <linux/types.h> > +#include <linux/uaccess.h> > +#include <linux/vfio.h> > +#include <linux/io.h> > +#include <linux/platform_device.h> > +#include <linux/irq.h> > + > +#include "vfio_platform_private.h" > + > +#define DRIVER_VERSION "0.7" > +#define DRIVER_AUTHOR "Antonios Motakis <a.mota...@virtualopensystems.com>" > +#define DRIVER_DESC "VFIO for platform devices - User Level meta-driver" > + > +/* probing devices from the linux platform bus */ > + > +static struct resource *get_platform_resource(struct vfio_platform_device > *vdev, > + int i) > +{ > + struct platform_device *pdev = (struct platform_device *) vdev->opaque; > + > + return platform_get_resource(pdev, IORESOURCE_MEM, i);
ARM may only support IORESOURCE_MEM, but I don't think platform devices are limited to MMIO, right? vfio-platform shouldn't be either. > +} > + > +static int get_platform_irq(struct vfio_platform_device *vdev, int i) > +{ > + struct platform_device *pdev = (struct platform_device *) vdev->opaque; > + > + return platform_get_irq(pdev, i); > +} > + > + > +static int vfio_platform_probe(struct platform_device *pdev) > +{ > + struct vfio_platform_device *vdev; > + int ret; > + > + vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); > + if (!vdev) > + return -ENOMEM; > + > + vdev->opaque = (void *) pdev; > + vdev->name = pdev->name; > + vdev->flags = VFIO_DEVICE_FLAGS_PLATFORM; > + vdev->get_resource = get_platform_resource; > + vdev->get_irq = get_platform_irq; > + > + ret = vfio_platform_probe_common(vdev, &pdev->dev); > + if (ret) > + kfree(vdev); > + > + return ret; > +} > + > +static int vfio_platform_remove(struct platform_device *pdev) > +{ > + return vfio_platform_remove_common(&pdev->dev); > +} > + > +static struct platform_driver vfio_platform_driver = { > + .probe = vfio_platform_probe, > + .remove = vfio_platform_remove, > + .driver = { > + .name = "vfio-platform", > + .owner = THIS_MODULE, > + }, > +}; > + > +module_platform_driver(vfio_platform_driver); > + > +MODULE_VERSION(DRIVER_VERSION); > +MODULE_LICENSE("GPL v2"); > +MODULE_AUTHOR(DRIVER_AUTHOR); > +MODULE_DESCRIPTION(DRIVER_DESC); > diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h > index 30f630c..b022a25 100644 > --- a/include/uapi/linux/vfio.h > +++ b/include/uapi/linux/vfio.h > @@ -158,6 +158,7 @@ struct vfio_device_info { > __u32 flags; > #define VFIO_DEVICE_FLAGS_RESET (1 << 0) /* Device supports > reset */ > #define VFIO_DEVICE_FLAGS_PCI (1 << 1) /* vfio-pci device */ > +#define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2) /* vfio-platform device */ > __u32 num_regions; /* Max region index + 1 */ > __u32 num_irqs; /* Max IRQ index + 1 */ > }; -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html