145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/*
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* Copyright 2016-2021 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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* Authors: Christian König, Felix Kuehling
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*/
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#include "amdgpu.h"
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/**
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* DOC: mem_info_preempt_used
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*
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* The amdgpu driver provides a sysfs API for reporting current total amount of
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* used preemptible memory.
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* The file mem_info_preempt_used is used for this, and returns the current
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* used size of the preemptible block, in bytes
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*/
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static ssize_t mem_info_preempt_used_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct drm_device *ddev = dev_get_drvdata(dev);
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struct amdgpu_device *adev = drm_to_adev(ddev);
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struct ttm_resource_manager *man = &adev->mman.preempt_mgr;
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return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man));
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}
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static DEVICE_ATTR_RO(mem_info_preempt_used);
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/**
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* amdgpu_preempt_mgr_new - allocate a new node
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*
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* @man: TTM memory type manager
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* @tbo: TTM BO we need this range for
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* @place: placement flags and restrictions
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* @res: TTM memory object
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*
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* Dummy, just count the space used without allocating resources or any limit.
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*/
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static int amdgpu_preempt_mgr_new(struct ttm_resource_manager *man,
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struct ttm_buffer_object *tbo,
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const struct ttm_place *place,
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struct ttm_resource **res)
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{
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*res = kzalloc(sizeof(**res), GFP_KERNEL);
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if (!*res)
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return -ENOMEM;
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ttm_resource_init(tbo, place, *res);
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(*res)->start = AMDGPU_BO_INVALID_OFFSET;
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return 0;
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}
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/**
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* amdgpu_preempt_mgr_del - free ranges
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*
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* @man: TTM memory type manager
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* @res: TTM memory object
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*
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* Free the allocated GTT again.
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*/
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static void amdgpu_preempt_mgr_del(struct ttm_resource_manager *man,
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struct ttm_resource *res)
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{
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ttm_resource_fini(man, res);
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kfree(res);
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}
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static const struct ttm_resource_manager_func amdgpu_preempt_mgr_func = {
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.alloc = amdgpu_preempt_mgr_new,
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.free = amdgpu_preempt_mgr_del,
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};
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/**
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* amdgpu_preempt_mgr_init - init PREEMPT manager and DRM MM
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*
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* @adev: amdgpu_device pointer
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*
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* Allocate and initialize the GTT manager.
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*/
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int amdgpu_preempt_mgr_init(struct amdgpu_device *adev)
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{
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struct ttm_resource_manager *man = &adev->mman.preempt_mgr;
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int ret;
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man->use_tt = true;
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man->func = &amdgpu_preempt_mgr_func;
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ttm_resource_manager_init(man, &adev->mman.bdev, (1 << 30));
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ret = device_create_file(adev->dev, &dev_attr_mem_info_preempt_used);
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if (ret) {
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DRM_ERROR("Failed to create device file mem_info_preempt_used\n");
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return ret;
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}
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ttm_set_driver_manager(&adev->mman.bdev, AMDGPU_PL_PREEMPT, man);
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ttm_resource_manager_set_used(man, true);
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return 0;
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}
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/**
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* amdgpu_preempt_mgr_fini - free and destroy GTT manager
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*
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* @adev: amdgpu_device pointer
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*
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* Destroy and free the GTT manager, returns -EBUSY if ranges are still
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* allocated inside it.
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*/
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void amdgpu_preempt_mgr_fini(struct amdgpu_device *adev)
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{
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struct ttm_resource_manager *man = &adev->mman.preempt_mgr;
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int ret;
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ttm_resource_manager_set_used(man, false);
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ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
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if (ret)
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return;
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device_remove_file(adev->dev, &dev_attr_mem_info_preempt_used);
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ttm_resource_manager_cleanup(man);
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ttm_set_driver_manager(&adev->mman.bdev, AMDGPU_PL_PREEMPT, NULL);
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}
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