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("amdgpu_xcp", pdev_num, NULL, 0); 59 if (IS_ERR(pdev)) 60 return PTR_ERR(pdev); 61 62 if (!devres_open_group(&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(pxcp_dev)) { 69 ret = PTR_ERR(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(&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(&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