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1/*2 * Copyright 2023 Advanced Micro Devices, Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * 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 6433 34struct xcp_device {35 struct drm_device drm;36 struct platform_device *pdev;37};38 39static 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 46static int8_t pdev_num;47static struct xcp_device *xcp_dev[MAX_XCP_PLATFORM_DEVICE];48 49int 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 82out_devres:83 devres_release_group(&pdev->dev, NULL);84out_unregister:85 platform_device_unregister(pdev);86 87 return ret;88}89EXPORT_SYMBOL(amdgpu_xcp_drm_dev_alloc);90 91void 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}102EXPORT_SYMBOL(amdgpu_xcp_drv_release);103 104static void __exit amdgpu_xcp_drv_exit(void)105{106 amdgpu_xcp_drv_release();107}108 109module_exit(amdgpu_xcp_drv_exit);110 111MODULE_AUTHOR("AMD linux driver team");112MODULE_DESCRIPTION("AMD XCP PLATFORM DEVICES");113MODULE_LICENSE("GPL and additional rights");114