projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 9df85aaa AM |
1 | /* |
| 2 | * Copyright (C) 2013 - Virtual Open Systems | |
| 3 | * Author: Antonios Motakis <a.motakis@virtualopensystems.com> | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License, version 2, as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | */ | |
| 14 | ||
| 15 | #include <linux/module.h> | |
| 16 | #include <linux/slab.h> | |
| 17 | #include <linux/vfio.h> | |
| 18 | #include <linux/platform_device.h> | |
| 19 | ||
| 20 | #include "vfio_platform_private.h" | |
| 21 | ||
| 22 | #define DRIVER_VERSION "0.10" | |
| 23 | #define DRIVER_AUTHOR "Antonios Motakis <a.motakis@virtualopensystems.com>" | |
| 24 | #define DRIVER_DESC "VFIO for platform devices - User Level meta-driver" | |
| 25 | ||
| b5add544 SK |
26 | static bool reset_required = true; |
| 27 | module_param(reset_required, bool, 0444); | |
| 28 | MODULE_PARM_DESC(reset_required, "override reset requirement (default: 1)"); | |
| 29 | ||
| 9df85aaa AM |
30 | /* probing devices from the linux platform bus */ |
| 31 | ||
| 32 | static struct resource *get_platform_resource(struct vfio_platform_device *vdev, | |
| 33 | int num) | |
| 34 | { | |
| 35 | struct platform_device *dev = (struct platform_device *) vdev->opaque; | |
| 36 | int i; | |
| 37 | ||
| 38 | for (i = 0; i < dev->num_resources; i++) { | |
| 39 | struct resource *r = &dev->resource[i]; | |
| 40 | ||
| 41 | if (resource_type(r) & (IORESOURCE_MEM|IORESOURCE_IO)) { | |
| 42 | if (!num) | |
| 43 | return r; | |
| 44 | ||
| 45 | num--; | |
| 46 | } | |
| 47 | } | |
| 48 | return NULL; | |
| 49 | } | |
| 50 | ||
| 51 | static int get_platform_irq(struct vfio_platform_device *vdev, int i) | |
| 52 | { | |
| 53 | struct platform_device *pdev = (struct platform_device *) vdev->opaque; | |
| 54 | ||
| 55 | return platform_get_irq(pdev, i); | |
| 56 | } | |
| 57 | ||
| 58 | static int vfio_platform_probe(struct platform_device *pdev) | |
| 59 | { | |
| 60 | struct vfio_platform_device *vdev; | |
| 61 | int ret; | |
| 62 | ||
| 63 | vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); | |
| 64 | if (!vdev) | |
| 65 | return -ENOMEM; | |
| 66 | ||
| 67 | vdev->opaque = (void *) pdev; | |
| 68 | vdev->name = pdev->name; | |
| 69 | vdev->flags = VFIO_DEVICE_FLAGS_PLATFORM; | |
| 70 | vdev->get_resource = get_platform_resource; | |
| 71 | vdev->get_irq = get_platform_irq; | |
| 32a2d71c | 72 | vdev->parent_module = THIS_MODULE; |
| b5add544 | 73 | vdev->reset_required = reset_required; |
| 9df85aaa AM |
74 | |
| 75 | ret = vfio_platform_probe_common(vdev, &pdev->dev); | |
| 76 | if (ret) | |
| 77 | kfree(vdev); | |
| 78 | ||
| 79 | return ret; | |
| 80 | } | |
| 81 | ||
| 82 | static int vfio_platform_remove(struct platform_device *pdev) | |
| 83 | { | |
| 84 | struct vfio_platform_device *vdev; | |
| 85 | ||
| 86 | vdev = vfio_platform_remove_common(&pdev->dev); | |
| 87 | if (vdev) { | |
| 88 | kfree(vdev); | |
| 89 | return 0; | |
| 90 | } | |
| 91 | ||
| 92 | return -EINVAL; | |
| 93 | } | |
| 94 | ||
| 95 | static struct platform_driver vfio_platform_driver = { | |
| 96 | .probe = vfio_platform_probe, | |
| 97 | .remove = vfio_platform_remove, | |
| 98 | .driver = { | |
| 99 | .name = "vfio-platform", | |
| 9df85aaa AM |
100 | }, |
| 101 | }; | |
| 102 | ||
| 103 | module_platform_driver(vfio_platform_driver); | |
| 104 | ||
| 105 | MODULE_VERSION(DRIVER_VERSION); | |
| 106 | MODULE_LICENSE("GPL v2"); | |
| 107 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
| 108 | MODULE_DESCRIPTION(DRIVER_DESC); |