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 int8_t pdev_num;
47 static struct xcp_device *xcp_dev[MAX_XCP_PLATFORM_DEVICE];
48
amdgpu_xcp_drm_dev_alloc(struct drm_device ** ddev)49 int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev)
50 {
51 struct platform_device *pdev;
52 struct xcp_device *pxcp_dev;
53 char dev_name[20];
54 int ret;
55
56 if (pdev_num >= MAX_XCP_PLATFORM_DEVICE)
57 return -ENODEV;
58
59 snprintf(dev_name, sizeof(dev_name), "amdgpu_xcp_%d", pdev_num);
60 pdev = platform_device_register_simple(dev_name, -1, NULL, 0);
61 if (IS_ERR(pdev))
62 return PTR_ERR(pdev);
63
64 if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
65 ret = -ENOMEM;
66 goto out_unregister;
67 }
68
69 pxcp_dev = devm_drm_dev_alloc(&pdev->dev, &amdgpu_xcp_driver, struct xcp_device, drm);
70 if (IS_ERR(pxcp_dev)) {
71 ret = PTR_ERR(pxcp_dev);
72 goto out_devres;
73 }
74
75 xcp_dev[pdev_num] = pxcp_dev;
76 xcp_dev[pdev_num]->pdev = pdev;
77 *ddev = &pxcp_dev->drm;
78 pdev_num++;
79
80 return 0;
81
82 out_devres:
83 devres_release_group(&pdev->dev, NULL);
84 out_unregister:
85 platform_device_unregister(pdev);
86
87 return ret;
88 }
89 EXPORT_SYMBOL(amdgpu_xcp_drm_dev_alloc);
90
amdgpu_xcp_drv_release(void)91 void amdgpu_xcp_drv_release(void)
92 {
93 for (--pdev_num; pdev_num >= 0; --pdev_num) {
94 struct platform_device *pdev = xcp_dev[pdev_num]->pdev;
95
96 devres_release_group(&pdev->dev, NULL);
97 platform_device_unregister(pdev);
98 xcp_dev[pdev_num] = NULL;
99 }
100 pdev_num = 0;
101 }
102 EXPORT_SYMBOL(amdgpu_xcp_drv_release);
103
amdgpu_xcp_drv_exit(void)104 static void __exit amdgpu_xcp_drv_exit(void)
105 {
106 amdgpu_xcp_drv_release();
107 }
108
109 module_exit(amdgpu_xcp_drv_exit);
110
111 MODULE_AUTHOR("AMD linux driver team");
112 MODULE_DESCRIPTION("AMD XCP PLATFORM DEVICES");
113 MODULE_LICENSE("GPL and additional rights");
114