1/*
 2 * Copyright (c) Red Hat Inc.
 3
 4 * Permission is hereby granted, free of charge, to any person obtaining a
 5 * copy of this software and associated documentation files (the "Software"),
 6 * to deal in the Software without restriction, including without limitation
 7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 8 * and/or sell copies of the Software, and to permit persons to whom the
 9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors: Dave Airlie <airlied@redhat.com>
24 *          Jerome Glisse <jglisse@redhat.com>
25 */
26#ifndef TTM_PAGE_ALLOC
27#define TTM_PAGE_ALLOC
28
29#include "ttm_bo_driver.h"
30#include "ttm_memory.h"
31
32/**
33 * Get count number of pages from pool to pages list.
 
 
 
 
 
 
 
 
 
 
 
34 *
35 * @pages: head of empty linked list where pages are filled.
36 * @flags: ttm flags for page allocation.
37 * @cstate: ttm caching state for the page.
38 * @count: number of pages to allocate.
39 * @dma_address: The DMA (bus) address of pages (if TTM_PAGE_FLAG_DMA32 set).
40 */
41int ttm_get_pages(struct list_head *pages,
42		  int flags,
43		  enum ttm_caching_state cstate,
44		  unsigned count,
45		  dma_addr_t *dma_address);
46/**
47 * Put linked list of pages to pool.
48 *
49 * @pages: list of pages to free.
50 * @page_count: number of pages in the list. Zero can be passed for unknown
51 * count.
52 * @flags: ttm flags for page allocation.
53 * @cstate: ttm caching state.
54 * @dma_address: The DMA (bus) address of pages (if TTM_PAGE_FLAG_DMA32 set).
55 */
56void ttm_put_pages(struct list_head *pages,
57		   unsigned page_count,
58		   int flags,
59		   enum ttm_caching_state cstate,
60		   dma_addr_t *dma_address);
 
61/**
62 * Initialize pool allocator.
63 */
64int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
 
65/**
66 * Free pool allocator.
67 */
68void ttm_page_alloc_fini(void);
69
70/**
71 * Output the state of pools to debugfs file
72 */
73extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
74#endif

 1/*
 2 * Copyright (c) Red Hat Inc.
 3
 4 * Permission is hereby granted, free of charge, to any person obtaining a
 5 * copy of this software and associated documentation files (the "Software"),
 6 * to deal in the Software without restriction, including without limitation
 7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 8 * and/or sell copies of the Software, and to permit persons to whom the
 9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors: Dave Airlie <airlied@redhat.com>
24 *          Jerome Glisse <jglisse@redhat.com>
25 */
26#ifndef TTM_PAGE_ALLOC
27#define TTM_PAGE_ALLOC
28
29#include "ttm_bo_driver.h"
30#include "ttm_memory.h"
31
32/**
33 * Initialize pool allocator.
34 */
35int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
36/**
37 * Free pool allocator.
38 */
39void ttm_page_alloc_fini(void);
40
41/**
42 * ttm_pool_populate:
43 *
44 * @ttm: The struct ttm_tt to contain the backing pages.
45 *
46 * Add backing pages to all of @ttm
47 */
48extern int ttm_pool_populate(struct ttm_tt *ttm);
49
 
 
 
 
 
 
 
50/**
51 * ttm_pool_unpopulate:
52 *
53 * @ttm: The struct ttm_tt which to free backing pages.
54 *
55 * Free all pages of @ttm
56 */
57extern void ttm_pool_unpopulate(struct ttm_tt *ttm);
58
59/**
60 * Output the state of pools to debugfs file
61 */
62extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
63
64
65#ifdef CONFIG_SWIOTLB
66/**
67 * Initialize pool allocator.
68 */
69int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
70
71/**
72 * Free pool allocator.
73 */
74void ttm_dma_page_alloc_fini(void);
75
76/**
77 * Output the state of pools to debugfs file
78 */
79extern int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
80
81extern int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev);
82extern void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev);
83
84#else
85static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
86					  unsigned max_pages)
87{
88	return -ENODEV;
89}
90
91static inline void ttm_dma_page_alloc_fini(void) { return; }
92
93static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
94{
95	return 0;
96}
97#endif
98
99#endif