b1e5f17232
Move the page allocation and freeing to driver callback and provide ttm code helper function for those. Most intrusive change, is the fact that we now only fully populate an object this simplify some of code designed around the page fault design. V2 Rebase on top of memory accounting overhaul V3 New rebase on top of more memory accouting changes V4 Rebase on top of no memory account changes (where/when is my delorean when i need it ?) Signed-off-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
92 lines
2.9 KiB
C
92 lines
2.9 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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* Get count number of pages from pool to pages list.
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*
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* @pages: head of empty linked list where pages are filled.
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* @flags: ttm flags for page allocation.
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* @cstate: ttm caching state for the page.
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* @count: number of pages to allocate.
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* @dma_address: The DMA (bus) address of pages (if TTM_PAGE_FLAG_DMA32 set).
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*/
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int ttm_get_pages(struct page **pages,
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int flags,
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enum ttm_caching_state cstate,
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unsigned npages,
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dma_addr_t *dma_address);
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/**
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* Put linked list of pages to pool.
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*
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* @pages: list of pages to free.
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* @page_count: number of pages in the list. Zero can be passed for unknown
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* count.
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* @flags: ttm flags for page allocation.
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* @cstate: ttm caching state.
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* @dma_address: The DMA (bus) address of pages (if TTM_PAGE_FLAG_DMA32 set).
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*/
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void ttm_put_pages(struct page **pages,
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unsigned npages,
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int flags,
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enum ttm_caching_state cstate,
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dma_addr_t *dma_address);
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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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#endif
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