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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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e2e966636a
Drivers like vmwgfx may want to test whether the dma page pool is present or not. Since it's activated by default by TTM if compiled-in, define a hidden configuration option that the driver can test for. Cc: Christian König <christian.koenig@amd.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Christian König <christian.koenig@amd.com>
123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/*
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* Copyright (c) Red Hat Inc.
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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, sub license,
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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 (including the
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* next paragraph) shall be included in all copies or substantial portions
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* 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 NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors: Dave Airlie <airlied@redhat.com>
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* Jerome Glisse <jglisse@redhat.com>
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*/
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#ifndef TTM_PAGE_ALLOC
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#define TTM_PAGE_ALLOC
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#include <drm/ttm/ttm_bo_driver.h>
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#include <drm/ttm/ttm_memory.h>
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struct device;
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/**
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* Initialize pool allocator.
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*/
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int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
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/**
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* Free pool allocator.
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*/
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void ttm_page_alloc_fini(void);
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/**
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* ttm_pool_populate:
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*
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* @ttm: The struct ttm_tt to contain the backing pages.
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*
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* Add backing pages to all of @ttm
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*/
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int ttm_pool_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx);
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/**
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* ttm_pool_unpopulate:
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*
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* @ttm: The struct ttm_tt which to free backing pages.
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*
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* Free all pages of @ttm
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*/
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void ttm_pool_unpopulate(struct ttm_tt *ttm);
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/**
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* Populates and DMA maps pages to fullfil a ttm_dma_populate() request
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*/
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int ttm_populate_and_map_pages(struct device *dev, struct ttm_dma_tt *tt,
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struct ttm_operation_ctx *ctx);
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/**
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* Unpopulates and DMA unmaps pages as part of a
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* ttm_dma_unpopulate() request */
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void ttm_unmap_and_unpopulate_pages(struct device *dev, struct ttm_dma_tt *tt);
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/**
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* Output the state of pools to debugfs file
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*/
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int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
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#if defined(CONFIG_DRM_TTM_DMA_PAGE_POOL)
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/**
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* Initialize pool allocator.
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*/
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int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
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/**
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* Free pool allocator.
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*/
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void ttm_dma_page_alloc_fini(void);
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/**
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* Output the state of pools to debugfs file
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*/
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int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
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int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev,
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struct ttm_operation_ctx *ctx);
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void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev);
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#else
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static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
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unsigned max_pages)
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{
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return -ENODEV;
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}
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static inline void ttm_dma_page_alloc_fini(void) { return; }
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static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
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{
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return 0;
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}
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static inline int ttm_dma_populate(struct ttm_dma_tt *ttm_dma,
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struct device *dev,
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struct ttm_operation_ctx *ctx)
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{
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return -ENOMEM;
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}
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static inline void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma,
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struct device *dev)
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{
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}
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#endif
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#endif
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