325 lines
8.8 KiB
C
325 lines
8.8 KiB
C
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/*
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* Copyright 2016 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
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*/
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#include <drm/ttm/ttm_range_manager.h>
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#include "amdgpu.h"
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static inline struct amdgpu_gtt_mgr *
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to_gtt_mgr(struct ttm_resource_manager *man)
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{
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return container_of(man, struct amdgpu_gtt_mgr, manager);
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}
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/**
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* DOC: mem_info_gtt_total
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*
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* The amdgpu driver provides a sysfs API for reporting current total size of
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* the GTT.
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* The file mem_info_gtt_total is used for this, and returns the total size of
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* the GTT block, in bytes
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*/
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static ssize_t amdgpu_mem_info_gtt_total_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;
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man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
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return sysfs_emit(buf, "%llu\n", man->size);
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}
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/**
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* DOC: mem_info_gtt_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 GTT.
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* The file mem_info_gtt_used is used for this, and returns the current used
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* size of the GTT block, in bytes
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*/
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static ssize_t amdgpu_mem_info_gtt_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.gtt_mgr.manager;
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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(mem_info_gtt_total, S_IRUGO,
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amdgpu_mem_info_gtt_total_show, NULL);
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static DEVICE_ATTR(mem_info_gtt_used, S_IRUGO,
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amdgpu_mem_info_gtt_used_show, NULL);
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static struct attribute *amdgpu_gtt_mgr_attributes[] = {
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&dev_attr_mem_info_gtt_total.attr,
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&dev_attr_mem_info_gtt_used.attr,
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NULL
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};
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const struct attribute_group amdgpu_gtt_mgr_attr_group = {
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.attrs = amdgpu_gtt_mgr_attributes
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};
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/**
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* amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space
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*
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* @res: the mem object to check
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*
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* Check if a mem object has already address space allocated.
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*/
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bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *res)
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{
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struct ttm_range_mgr_node *node = to_ttm_range_mgr_node(res);
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return drm_mm_node_allocated(&node->mm_nodes[0]);
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}
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/**
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* amdgpu_gtt_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: the resulting mem object
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*
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* Dummy, allocate the node but no space for it yet.
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*/
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static int amdgpu_gtt_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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struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
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uint32_t num_pages = PFN_UP(tbo->base.size);
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struct ttm_range_mgr_node *node;
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int r;
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node = kzalloc(struct_size(node, mm_nodes, 1), GFP_KERNEL);
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if (!node)
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return -ENOMEM;
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ttm_resource_init(tbo, place, &node->base);
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if (!(place->flags & TTM_PL_FLAG_TEMPORARY) &&
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ttm_resource_manager_usage(man) > man->size) {
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r = -ENOSPC;
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goto err_free;
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}
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if (place->lpfn) {
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spin_lock(&mgr->lock);
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r = drm_mm_insert_node_in_range(&mgr->mm, &node->mm_nodes[0],
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num_pages, tbo->page_alignment,
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0, place->fpfn, place->lpfn,
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DRM_MM_INSERT_BEST);
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spin_unlock(&mgr->lock);
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if (unlikely(r))
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goto err_free;
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node->base.start = node->mm_nodes[0].start;
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} else {
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node->mm_nodes[0].start = 0;
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node->mm_nodes[0].size = PFN_UP(node->base.size);
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node->base.start = AMDGPU_BO_INVALID_OFFSET;
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}
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*res = &node->base;
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return 0;
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err_free:
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ttm_resource_fini(man, &node->base);
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kfree(node);
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return r;
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}
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/**
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* amdgpu_gtt_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_gtt_mgr_del(struct ttm_resource_manager *man,
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struct ttm_resource *res)
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{
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struct ttm_range_mgr_node *node = to_ttm_range_mgr_node(res);
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struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
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spin_lock(&mgr->lock);
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if (drm_mm_node_allocated(&node->mm_nodes[0]))
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drm_mm_remove_node(&node->mm_nodes[0]);
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spin_unlock(&mgr->lock);
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ttm_resource_fini(man, res);
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kfree(node);
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}
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/**
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* amdgpu_gtt_mgr_recover - re-init gart
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*
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* @mgr: amdgpu_gtt_mgr pointer
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*
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* Re-init the gart for each known BO in the GTT.
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*/
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void amdgpu_gtt_mgr_recover(struct amdgpu_gtt_mgr *mgr)
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{
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struct ttm_range_mgr_node *node;
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struct drm_mm_node *mm_node;
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struct amdgpu_device *adev;
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adev = container_of(mgr, typeof(*adev), mman.gtt_mgr);
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spin_lock(&mgr->lock);
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drm_mm_for_each_node(mm_node, &mgr->mm) {
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node = container_of(mm_node, typeof(*node), mm_nodes[0]);
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amdgpu_ttm_recover_gart(node->base.bo);
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}
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spin_unlock(&mgr->lock);
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amdgpu_gart_invalidate_tlb(adev);
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}
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/**
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* amdgpu_gtt_mgr_intersects - test for intersection
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*
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* @man: Our manager object
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* @res: The resource to test
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* @place: The place for the new allocation
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* @size: The size of the new allocation
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*
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* Simplified intersection test, only interesting if we need GART or not.
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*/
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static bool amdgpu_gtt_mgr_intersects(struct ttm_resource_manager *man,
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struct ttm_resource *res,
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const struct ttm_place *place,
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size_t size)
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{
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return !place->lpfn || amdgpu_gtt_mgr_has_gart_addr(res);
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}
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/**
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* amdgpu_gtt_mgr_compatible - test for compatibility
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*
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* @man: Our manager object
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* @res: The resource to test
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* @place: The place for the new allocation
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* @size: The size of the new allocation
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*
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* Simplified compatibility test.
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*/
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static bool amdgpu_gtt_mgr_compatible(struct ttm_resource_manager *man,
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struct ttm_resource *res,
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const struct ttm_place *place,
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size_t size)
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{
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return !place->lpfn || amdgpu_gtt_mgr_has_gart_addr(res);
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}
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/**
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* amdgpu_gtt_mgr_debug - dump VRAM table
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*
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* @man: TTM memory type manager
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* @printer: DRM printer to use
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*
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* Dump the table content using printk.
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*/
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static void amdgpu_gtt_mgr_debug(struct ttm_resource_manager *man,
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struct drm_printer *printer)
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{
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struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
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spin_lock(&mgr->lock);
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drm_mm_print(&mgr->mm, printer);
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spin_unlock(&mgr->lock);
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}
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static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func = {
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.alloc = amdgpu_gtt_mgr_new,
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.free = amdgpu_gtt_mgr_del,
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.intersects = amdgpu_gtt_mgr_intersects,
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.compatible = amdgpu_gtt_mgr_compatible,
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.debug = amdgpu_gtt_mgr_debug
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};
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/**
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* amdgpu_gtt_mgr_init - init GTT manager and DRM MM
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*
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* @adev: amdgpu_device pointer
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* @gtt_size: maximum size of GTT
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*
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* Allocate and initialize the GTT manager.
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*/
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int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
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{
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struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
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struct ttm_resource_manager *man = &mgr->manager;
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uint64_t start, size;
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man->use_tt = true;
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man->func = &amdgpu_gtt_mgr_func;
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ttm_resource_manager_init(man, &adev->mman.bdev, gtt_size);
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start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
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size = (adev->gmc.gart_size >> PAGE_SHIFT) - start;
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drm_mm_init(&mgr->mm, start, size);
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spin_lock_init(&mgr->lock);
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ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, &mgr->manager);
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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_gtt_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_gtt_mgr_fini(struct amdgpu_device *adev)
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{
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struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
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struct ttm_resource_manager *man = &mgr->manager;
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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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spin_lock(&mgr->lock);
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drm_mm_takedown(&mgr->mm);
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spin_unlock(&mgr->lock);
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ttm_resource_manager_cleanup(man);
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ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, NULL);
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}
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