gro: Allow tunnel stacking in the case of FOU/GUE
[linux/fpc-iii.git] / include / drm / ttm / ttm_page_alloc.h
blob49a828425fa2d984615b6352812681a455d7d99b
1 /*
2 * Copyright (c) Red Hat Inc.
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:
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.
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.
23 * Authors: Dave Airlie <airlied@redhat.com>
24 * Jerome Glisse <jglisse@redhat.com>
26 #ifndef TTM_PAGE_ALLOC
27 #define TTM_PAGE_ALLOC
29 #include <drm/ttm/ttm_bo_driver.h>
30 #include <drm/ttm/ttm_memory.h>
32 struct device;
34 /**
35 * Initialize pool allocator.
37 int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
38 /**
39 * Free pool allocator.
41 void ttm_page_alloc_fini(void);
43 /**
44 * ttm_pool_populate:
46 * @ttm: The struct ttm_tt to contain the backing pages.
48 * Add backing pages to all of @ttm
50 extern int ttm_pool_populate(struct ttm_tt *ttm);
52 /**
53 * ttm_pool_unpopulate:
55 * @ttm: The struct ttm_tt which to free backing pages.
57 * Free all pages of @ttm
59 extern void ttm_pool_unpopulate(struct ttm_tt *ttm);
61 /**
62 * Output the state of pools to debugfs file
64 extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
67 #if defined(CONFIG_SWIOTLB) || defined(CONFIG_INTEL_IOMMU)
68 /**
69 * Initialize pool allocator.
71 int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
73 /**
74 * Free pool allocator.
76 void ttm_dma_page_alloc_fini(void);
78 /**
79 * Output the state of pools to debugfs file
81 extern int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
83 extern int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev);
84 extern void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev);
86 #else
87 static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
88 unsigned max_pages)
90 return -ENODEV;
93 static inline void ttm_dma_page_alloc_fini(void) { return; }
95 static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
97 return 0;
99 static inline int ttm_dma_populate(struct ttm_dma_tt *ttm_dma,
100 struct device *dev)
102 return -ENOMEM;
104 static inline void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma,
105 struct device *dev)
108 #endif
110 #endif