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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h')
-rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h new file mode 100644 index 0000000000..3c988cc406 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h @@ -0,0 +1,168 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Copyright 2020 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 + */ + +#ifndef __AMDGPU_RES_CURSOR_H__ +#define __AMDGPU_RES_CURSOR_H__ + +#include <drm/drm_mm.h> +#include <drm/ttm/ttm_resource.h> +#include <drm/ttm/ttm_range_manager.h> + +#include "amdgpu_vram_mgr.h" + +/* state back for walking over vram_mgr and gtt_mgr allocations */ +struct amdgpu_res_cursor { + uint64_t start; + uint64_t size; + uint64_t remaining; + void *node; + uint32_t mem_type; +}; + +/** + * amdgpu_res_first - initialize a amdgpu_res_cursor + * + * @res: TTM resource object to walk + * @start: Start of the range + * @size: Size of the range + * @cur: cursor object to initialize + * + * Start walking over the range of allocations between @start and @size. + */ +static inline void amdgpu_res_first(struct ttm_resource *res, + uint64_t start, uint64_t size, + struct amdgpu_res_cursor *cur) +{ + struct drm_buddy_block *block; + struct list_head *head, *next; + struct drm_mm_node *node; + + if (!res) + goto fallback; + + BUG_ON(start + size > res->size); + + cur->mem_type = res->mem_type; + + switch (cur->mem_type) { + case TTM_PL_VRAM: + head = &to_amdgpu_vram_mgr_resource(res)->blocks; + + block = list_first_entry_or_null(head, + struct drm_buddy_block, + link); + if (!block) + goto fallback; + + while (start >= amdgpu_vram_mgr_block_size(block)) { + start -= amdgpu_vram_mgr_block_size(block); + + next = block->link.next; + if (next != head) + block = list_entry(next, struct drm_buddy_block, link); + } + + cur->start = amdgpu_vram_mgr_block_start(block) + start; + cur->size = min(amdgpu_vram_mgr_block_size(block) - start, size); + cur->remaining = size; + cur->node = block; + break; + case TTM_PL_TT: + case AMDGPU_PL_DOORBELL: + node = to_ttm_range_mgr_node(res)->mm_nodes; + while (start >= node->size << PAGE_SHIFT) + start -= node++->size << PAGE_SHIFT; + + cur->start = (node->start << PAGE_SHIFT) + start; + cur->size = min((node->size << PAGE_SHIFT) - start, size); + cur->remaining = size; + cur->node = node; + break; + default: + goto fallback; + } + + return; + +fallback: + cur->start = start; + cur->size = size; + cur->remaining = size; + cur->node = NULL; + WARN_ON(res && start + size > res->size); + return; +} + +/** + * amdgpu_res_next - advance the cursor + * + * @cur: the cursor to advance + * @size: number of bytes to move forward + * + * Move the cursor @size bytes forwrad, walking to the next node if necessary. + */ +static inline void amdgpu_res_next(struct amdgpu_res_cursor *cur, uint64_t size) +{ + struct drm_buddy_block *block; + struct drm_mm_node *node; + struct list_head *next; + + BUG_ON(size > cur->remaining); + + cur->remaining -= size; + if (!cur->remaining) + return; + + cur->size -= size; + if (cur->size) { + cur->start += size; + return; + } + + switch (cur->mem_type) { + case TTM_PL_VRAM: + block = cur->node; + + next = block->link.next; + block = list_entry(next, struct drm_buddy_block, link); + + cur->node = block; + cur->start = amdgpu_vram_mgr_block_start(block); + cur->size = min(amdgpu_vram_mgr_block_size(block), cur->remaining); + break; + case TTM_PL_TT: + case AMDGPU_PL_DOORBELL: + node = cur->node; + + cur->node = ++node; + cur->start = node->start << PAGE_SHIFT; + cur->size = min(node->size << PAGE_SHIFT, cur->remaining); + break; + default: + return; + } +} + +#endif |