/* * Copyright (C) 2013 - Virtual Open Systems * Author: Antonios Motakis <a.motakis@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/module.h> #include <linux/slab.h> #include <linux/vfio.h> #include <linux/platform_device.h> #include "vfio_platform_private.h" #define DRIVER_VERSION "0.10" #define DRIVER_AUTHOR "Antonios Motakis <a.motakis@virtualopensystems.com>" #define DRIVER_DESC "VFIO for platform devices - User Level meta-driver" static bool reset_required = true; module_param(reset_required, bool, 0444); MODULE_PARM_DESC(reset_required, "override reset requirement (default: 1)"); /* probing devices from the linux platform bus */ static struct resource *get_platform_resource(struct vfio_platform_device *vdev, int num) { struct platform_device *dev = (struct platform_device *) vdev->opaque; int i; for (i = 0; i < dev->num_resources; i++) { struct resource *r = &dev->resource[i]; if (resource_type(r) & (IORESOURCE_MEM|IORESOURCE_IO)) { if (!num) return r; num--; } } return NULL; } 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; vdev->parent_module = THIS_MODULE; vdev->reset_required = reset_required; ret = vfio_platform_probe_common(vdev, &pdev->dev); if (ret) kfree(vdev); return ret; } 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; } return -EINVAL; } static struct platform_driver vfio_platform_driver = { .probe = vfio_platform_probe, .remove = vfio_platform_remove, .driver = { .name = "vfio-platform", }, }; module_platform_driver(vfio_platform_driver); MODULE_VERSION(DRIVER_VERSION); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC);