97d814fe4f
amdxcp is a platform driver for creating partition devices. libdrm library identifies a platform device based on 'OF_FULLNAME' or 'MODALIAS'. If two or more devices have the same platform name, drm library only picks the first device. Platform driver core uses name of the device to populate 'MODALIAS'. When 'amdgpu_xcp' is used as the base name, only first partition device gets identified. Assign unique name so that drm library identifies partition devices separately. amdxcp doesn't support probe of partitions, it doesn't bother about modaliases. Signed-off-by: Lijo Lazar <lijo.lazar@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Acked-by: James Zhu <James.Zhu@amd.com> Reviewed-by: Asad Kamal <asad.kamal@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
113 lines
3 KiB
C
113 lines
3 KiB
C
/*
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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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char dev_name[20];
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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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snprintf(dev_name, sizeof(dev_name), "amdgpu_xcp_%d", pdev_num);
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pdev = platform_device_register_simple(dev_name, -1, 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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struct platform_device *pdev = xcp_dev[pdev_num]->pdev;
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devres_release_group(&pdev->dev, NULL);
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platform_device_unregister(pdev);
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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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