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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 | ||
26 | /* probing devices from the linux platform bus */ | |
27 | ||
28 | static struct resource *get_platform_resource(struct vfio_platform_device *vdev, | |
29 | int num) | |
30 | { | |
31 | struct platform_device *dev = (struct platform_device *) vdev->opaque; | |
32 | int i; | |
33 | ||
34 | for (i = 0; i < dev->num_resources; i++) { | |
35 | struct resource *r = &dev->resource[i]; | |
36 | ||
37 | if (resource_type(r) & (IORESOURCE_MEM|IORESOURCE_IO)) { | |
38 | if (!num) | |
39 | return r; | |
40 | ||
41 | num--; | |
42 | } | |
43 | } | |
44 | return NULL; | |
45 | } | |
46 | ||
47 | static int get_platform_irq(struct vfio_platform_device *vdev, int i) | |
48 | { | |
49 | struct platform_device *pdev = (struct platform_device *) vdev->opaque; | |
50 | ||
51 | return platform_get_irq(pdev, i); | |
52 | } | |
53 | ||
54 | static int vfio_platform_probe(struct platform_device *pdev) | |
55 | { | |
56 | struct vfio_platform_device *vdev; | |
57 | int ret; | |
58 | ||
59 | vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); | |
60 | if (!vdev) | |
61 | return -ENOMEM; | |
62 | ||
63 | vdev->opaque = (void *) pdev; | |
64 | vdev->name = pdev->name; | |
65 | vdev->flags = VFIO_DEVICE_FLAGS_PLATFORM; | |
66 | vdev->get_resource = get_platform_resource; | |
67 | vdev->get_irq = get_platform_irq; | |
32a2d71c | 68 | vdev->parent_module = THIS_MODULE; |
9df85aaa AM |
69 | |
70 | ret = vfio_platform_probe_common(vdev, &pdev->dev); | |
71 | if (ret) | |
72 | kfree(vdev); | |
73 | ||
74 | return ret; | |
75 | } | |
76 | ||
77 | static int vfio_platform_remove(struct platform_device *pdev) | |
78 | { | |
79 | struct vfio_platform_device *vdev; | |
80 | ||
81 | vdev = vfio_platform_remove_common(&pdev->dev); | |
82 | if (vdev) { | |
83 | kfree(vdev); | |
84 | return 0; | |
85 | } | |
86 | ||
87 | return -EINVAL; | |
88 | } | |
89 | ||
90 | static struct platform_driver vfio_platform_driver = { | |
91 | .probe = vfio_platform_probe, | |
92 | .remove = vfio_platform_remove, | |
93 | .driver = { | |
94 | .name = "vfio-platform", | |
9df85aaa AM |
95 | }, |
96 | }; | |
97 | ||
98 | module_platform_driver(vfio_platform_driver); | |
99 | ||
100 | MODULE_VERSION(DRIVER_VERSION); | |
101 | MODULE_LICENSE("GPL v2"); | |
102 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
103 | MODULE_DESCRIPTION(DRIVER_DESC); |