8e7e70522d
Move dma data to a superset ttm_dma_tt structure which herit from ttm_tt. This allow driver that don't use dma functionalities to not have to waste memory for it. V2 Rebase on top of no memory account changes (where/when is my delorean when i need it ?) V3 Make sure page list is initialized empty V4 typo/syntax fixes Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
100 lines
2.7 KiB
C
100 lines
2.7 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 "ttm_bo_driver.h"
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#include "ttm_memory.h"
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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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extern int ttm_pool_populate(struct ttm_tt *ttm);
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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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extern void ttm_pool_unpopulate(struct ttm_tt *ttm);
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/**
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* Output the state of pools to debugfs file
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*/
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extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
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#ifdef CONFIG_SWIOTLB
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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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extern int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
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extern int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev);
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extern 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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#endif
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#endif
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