1 | /* |
2 | * Copyright 2023 Advanced Micro Devices, Inc. |
3 | * |
4 | * Permission is hereby granted, free of charge, to any person obtaining a |
5 | * copy of this software and associated documentation files (the "Software"), |
6 | * to deal in the Software without restriction, including without limitation |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
8 | * and/or sell copies of the Software, and to permit persons to whom the |
9 | * Software is furnished to do so, subject to the following conditions: |
10 | * |
11 | * The above copyright notice and this permission notice shall be included in |
12 | * all copies or substantial portions of the Software. |
13 | * |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
20 | * OTHER DEALINGS IN THE SOFTWARE. |
21 | * |
22 | */ |
23 | |
24 | #include <linux/init.h> |
25 | #include <linux/module.h> |
26 | #include <linux/platform_device.h> |
27 | |
28 | #include <drm/drm_drv.h> |
29 | |
30 | #include "amdgpu_xcp_drv.h" |
31 | |
32 | #define MAX_XCP_PLATFORM_DEVICE 64 |
33 | |
34 | struct xcp_device { |
35 | struct drm_device drm; |
36 | struct platform_device *pdev; |
37 | }; |
38 | |
39 | static const struct drm_driver amdgpu_xcp_driver = { |
40 | .driver_features = DRIVER_GEM | DRIVER_RENDER, |
41 | .name = "amdgpu_xcp_drv" , |
42 | .major = 1, |
43 | .minor = 0, |
44 | }; |
45 | |
46 | static int pdev_num; |
47 | static struct xcp_device *xcp_dev[MAX_XCP_PLATFORM_DEVICE]; |
48 | |
49 | int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev) |
50 | { |
51 | struct platform_device *pdev; |
52 | struct xcp_device *pxcp_dev; |
53 | int ret; |
54 | |
55 | if (pdev_num >= MAX_XCP_PLATFORM_DEVICE) |
56 | return -ENODEV; |
57 | |
58 | pdev = platform_device_register_simple(name: "amdgpu_xcp" , id: pdev_num, NULL, num: 0); |
59 | if (IS_ERR(ptr: pdev)) |
60 | return PTR_ERR(ptr: pdev); |
61 | |
62 | if (!devres_open_group(dev: &pdev->dev, NULL, GFP_KERNEL)) { |
63 | ret = -ENOMEM; |
64 | goto out_unregister; |
65 | } |
66 | |
67 | pxcp_dev = devm_drm_dev_alloc(&pdev->dev, &amdgpu_xcp_driver, struct xcp_device, drm); |
68 | if (IS_ERR(ptr: pxcp_dev)) { |
69 | ret = PTR_ERR(ptr: pxcp_dev); |
70 | goto out_devres; |
71 | } |
72 | |
73 | xcp_dev[pdev_num] = pxcp_dev; |
74 | xcp_dev[pdev_num]->pdev = pdev; |
75 | *ddev = &pxcp_dev->drm; |
76 | pdev_num++; |
77 | |
78 | return 0; |
79 | |
80 | out_devres: |
81 | devres_release_group(dev: &pdev->dev, NULL); |
82 | out_unregister: |
83 | platform_device_unregister(pdev); |
84 | |
85 | return ret; |
86 | } |
87 | EXPORT_SYMBOL(amdgpu_xcp_drm_dev_alloc); |
88 | |
89 | void amdgpu_xcp_drv_release(void) |
90 | { |
91 | for (--pdev_num; pdev_num >= 0; --pdev_num) { |
92 | struct platform_device *pdev = xcp_dev[pdev_num]->pdev; |
93 | |
94 | devres_release_group(dev: &pdev->dev, NULL); |
95 | platform_device_unregister(pdev); |
96 | xcp_dev[pdev_num] = NULL; |
97 | } |
98 | pdev_num = 0; |
99 | } |
100 | EXPORT_SYMBOL(amdgpu_xcp_drv_release); |
101 | |
102 | static void __exit amdgpu_xcp_drv_exit(void) |
103 | { |
104 | amdgpu_xcp_drv_release(); |
105 | } |
106 | |
107 | module_exit(amdgpu_xcp_drv_exit); |
108 | |
109 | MODULE_AUTHOR("AMD linux driver team" ); |
110 | MODULE_DESCRIPTION("AMD XCP PLATFORM DEVICES" ); |
111 | MODULE_LICENSE("GPL and additional rights" ); |
112 | |