111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
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/*
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* Copyright 2023 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <drm/drm_drv.h>
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#include "amdgpu_xcp_drv.h"
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#define MAX_XCP_PLATFORM_DEVICE 64
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struct xcp_device {
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struct drm_device drm;
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struct platform_device *pdev;
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};
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static const struct drm_driver amdgpu_xcp_driver = {
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.driver_features = DRIVER_GEM | DRIVER_RENDER,
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.name = "amdgpu_xcp_drv",
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.major = 1,
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.minor = 0,
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};
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static int pdev_num;
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static struct xcp_device *xcp_dev[MAX_XCP_PLATFORM_DEVICE];
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int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev)
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{
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struct platform_device *pdev;
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struct xcp_device *pxcp_dev;
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int ret;
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if (pdev_num >= MAX_XCP_PLATFORM_DEVICE)
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return -ENODEV;
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pdev = platform_device_register_simple("amdgpu_xcp", pdev_num, NULL, 0);
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if (IS_ERR(pdev))
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return PTR_ERR(pdev);
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if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
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ret = -ENOMEM;
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goto out_unregister;
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}
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pxcp_dev = devm_drm_dev_alloc(&pdev->dev, &amdgpu_xcp_driver, struct xcp_device, drm);
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if (IS_ERR(pxcp_dev)) {
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ret = PTR_ERR(pxcp_dev);
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goto out_devres;
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}
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xcp_dev[pdev_num] = pxcp_dev;
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xcp_dev[pdev_num]->pdev = pdev;
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*ddev = &pxcp_dev->drm;
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pdev_num++;
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return 0;
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out_devres:
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devres_release_group(&pdev->dev, NULL);
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out_unregister:
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platform_device_unregister(pdev);
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return ret;
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}
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EXPORT_SYMBOL(amdgpu_xcp_drm_dev_alloc);
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void amdgpu_xcp_drv_release(void)
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{
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for (--pdev_num; pdev_num >= 0; --pdev_num) {
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devres_release_group(&xcp_dev[pdev_num]->pdev->dev, NULL);
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platform_device_unregister(xcp_dev[pdev_num]->pdev);
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xcp_dev[pdev_num]->pdev = NULL;
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xcp_dev[pdev_num] = NULL;
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}
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pdev_num = 0;
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}
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EXPORT_SYMBOL(amdgpu_xcp_drv_release);
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static void __exit amdgpu_xcp_drv_exit(void)
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{
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amdgpu_xcp_drv_release();
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}
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module_exit(amdgpu_xcp_drv_exit);
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MODULE_AUTHOR("AMD linux driver team");
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MODULE_DESCRIPTION("AMD XCP PLATFORM DEVICES");
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MODULE_LICENSE("GPL and additional rights");
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