cb1c81467a
Instead of both driver and TTM allocating memory finalize embedding the ttm_resource object as base into the driver backends. v2: fix typo in vmwgfx grid mgr and double init in amdgpu_vram_mgr.c Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210602100914.46246-10-christian.koenig@amd.com
107 lines
3.0 KiB
C
107 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/*
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* Copyright 2020 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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#ifndef __AMDGPU_RES_CURSOR_H__
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#define __AMDGPU_RES_CURSOR_H__
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#include <drm/drm_mm.h>
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#include <drm/ttm/ttm_resource.h>
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#include <drm/ttm/ttm_range_manager.h>
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/* state back for walking over vram_mgr and gtt_mgr allocations */
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struct amdgpu_res_cursor {
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uint64_t start;
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uint64_t size;
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uint64_t remaining;
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struct drm_mm_node *node;
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};
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/**
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* amdgpu_res_first - initialize a amdgpu_res_cursor
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*
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* @res: TTM resource object to walk
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* @start: Start of the range
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* @size: Size of the range
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* @cur: cursor object to initialize
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*
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* Start walking over the range of allocations between @start and @size.
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*/
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static inline void amdgpu_res_first(struct ttm_resource *res,
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uint64_t start, uint64_t size,
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struct amdgpu_res_cursor *cur)
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{
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struct drm_mm_node *node;
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if (!res) {
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cur->start = start;
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cur->size = size;
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cur->remaining = size;
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cur->node = NULL;
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return;
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}
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BUG_ON(start + size > res->num_pages << PAGE_SHIFT);
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node = to_ttm_range_mgr_node(res)->mm_nodes;
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while (start >= node->size << PAGE_SHIFT)
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start -= node++->size << PAGE_SHIFT;
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cur->start = (node->start << PAGE_SHIFT) + start;
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cur->size = min((node->size << PAGE_SHIFT) - start, size);
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cur->remaining = size;
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cur->node = node;
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}
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/**
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* amdgpu_res_next - advance the cursor
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*
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* @cur: the cursor to advance
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* @size: number of bytes to move forward
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*
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* Move the cursor @size bytes forwrad, walking to the next node if necessary.
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*/
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static inline void amdgpu_res_next(struct amdgpu_res_cursor *cur, uint64_t size)
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{
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struct drm_mm_node *node = cur->node;
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BUG_ON(size > cur->remaining);
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cur->remaining -= size;
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if (!cur->remaining)
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return;
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cur->size -= size;
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if (cur->size) {
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cur->start += size;
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return;
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}
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cur->node = ++node;
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cur->start = node->start << PAGE_SHIFT;
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cur->size = min(node->size << PAGE_SHIFT, cur->remaining);
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}
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#endif
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