// SPDX-License-Identifier: GPL-2.0 OR MIT /* * Copyright 2016-2021 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: Christian König, Felix Kuehling */ #include "amdgpu.h" /** * DOC: mem_info_preempt_used * * The amdgpu driver provides a sysfs API for reporting current total amount of * used preemptible memory. * The file mem_info_preempt_used is used for this, and returns the current * used size of the preemptible block, in bytes */ static ssize_t mem_info_preempt_used_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(mem_info_preempt_used); /** * amdgpu_preempt_mgr_new - allocate a new node * * @man: TTM memory type manager * @tbo: TTM BO we need this range for * @place: placement flags and restrictions * @res: TTM memory object * * Dummy, just count the space used without allocating resources or any limit. */ static int amdgpu_preempt_mgr_new(struct ttm_resource_manager *man, struct ttm_buffer_object *tbo, const struct ttm_place *place, struct ttm_resource **res) { … } /** * amdgpu_preempt_mgr_del - free ranges * * @man: TTM memory type manager * @res: TTM memory object * * Free the allocated GTT again. */ static void amdgpu_preempt_mgr_del(struct ttm_resource_manager *man, struct ttm_resource *res) { … } static const struct ttm_resource_manager_func amdgpu_preempt_mgr_func = …; /** * amdgpu_preempt_mgr_init - init PREEMPT manager and DRM MM * * @adev: amdgpu_device pointer * * Allocate and initialize the GTT manager. */ int amdgpu_preempt_mgr_init(struct amdgpu_device *adev) { … } /** * amdgpu_preempt_mgr_fini - free and destroy GTT manager * * @adev: amdgpu_device pointer * * Destroy and free the GTT manager, returns -EBUSY if ranges are still * allocated inside it. */ void amdgpu_preempt_mgr_fini(struct amdgpu_device *adev) { … }