From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/gpu/drm/amd/amdgpu/amdgpu_preempt_mgr.c | 144 ++++++++++++++++++++++++ 1 file changed, 144 insertions(+) create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_preempt_mgr.c (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_preempt_mgr.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_preempt_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_preempt_mgr.c new file mode 100644 index 0000000000..e8adfd0a57 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_preempt_mgr.c @@ -0,0 +1,144 @@ +// 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) +{ + struct drm_device *ddev = dev_get_drvdata(dev); + struct amdgpu_device *adev = drm_to_adev(ddev); + struct ttm_resource_manager *man = &adev->mman.preempt_mgr; + + return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man)); +} + +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) +{ + *res = kzalloc(sizeof(**res), GFP_KERNEL); + if (!*res) + return -ENOMEM; + + ttm_resource_init(tbo, place, *res); + (*res)->start = AMDGPU_BO_INVALID_OFFSET; + return 0; +} + +/** + * 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) +{ + ttm_resource_fini(man, res); + kfree(res); +} + +static const struct ttm_resource_manager_func amdgpu_preempt_mgr_func = { + .alloc = amdgpu_preempt_mgr_new, + .free = amdgpu_preempt_mgr_del, +}; + +/** + * 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) +{ + struct ttm_resource_manager *man = &adev->mman.preempt_mgr; + int ret; + + man->use_tt = true; + man->func = &amdgpu_preempt_mgr_func; + + ttm_resource_manager_init(man, &adev->mman.bdev, (1 << 30)); + + ret = device_create_file(adev->dev, &dev_attr_mem_info_preempt_used); + if (ret) { + DRM_ERROR("Failed to create device file mem_info_preempt_used\n"); + return ret; + } + + ttm_set_driver_manager(&adev->mman.bdev, AMDGPU_PL_PREEMPT, man); + ttm_resource_manager_set_used(man, true); + return 0; +} + +/** + * 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) +{ + struct ttm_resource_manager *man = &adev->mman.preempt_mgr; + int ret; + + ttm_resource_manager_set_used(man, false); + + ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man); + if (ret) + return; + + device_remove_file(adev->dev, &dev_attr_mem_info_preempt_used); + + ttm_resource_manager_cleanup(man); + ttm_set_driver_manager(&adev->mman.bdev, AMDGPU_PL_PREEMPT, NULL); +} -- cgit v1.2.3