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1 | /************************************************************************** |
2 | * | |
3 | * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | /* | |
28 | * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> | |
29 | * Keith Packard. | |
30 | */ | |
31 | ||
32 | #include "ttm/ttm_module.h" | |
33 | #include "ttm/ttm_bo_driver.h" | |
dea7e0ac | 34 | #include "ttm/ttm_page_alloc.h" |
ba4e7d97 TH |
35 | #ifdef TTM_HAS_AGP |
36 | #include "ttm/ttm_placement.h" | |
37 | #include <linux/agp_backend.h> | |
38 | #include <linux/module.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
ba4e7d97 TH |
40 | #include <linux/io.h> |
41 | #include <asm/agp.h> | |
42 | ||
43 | struct ttm_agp_backend { | |
649bf3ca | 44 | struct ttm_tt ttm; |
ba4e7d97 TH |
45 | struct agp_memory *mem; |
46 | struct agp_bridge_data *bridge; | |
47 | }; | |
48 | ||
649bf3ca | 49 | static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem) |
ba4e7d97 | 50 | { |
649bf3ca JG |
51 | struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); |
52 | struct drm_mm_node *node = bo_mem->mm_node; | |
ba4e7d97 | 53 | struct agp_memory *mem; |
649bf3ca JG |
54 | int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED); |
55 | unsigned i; | |
ba4e7d97 | 56 | |
649bf3ca | 57 | mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY); |
ba4e7d97 TH |
58 | if (unlikely(mem == NULL)) |
59 | return -ENOMEM; | |
60 | ||
61 | mem->page_count = 0; | |
649bf3ca JG |
62 | for (i = 0; i < ttm->num_pages; i++) { |
63 | struct page *page = ttm->pages[i]; | |
64 | ||
ba4e7d97 | 65 | if (!page) |
649bf3ca | 66 | page = ttm->dummy_read_page; |
ba4e7d97 | 67 | |
07613ba2 | 68 | mem->pages[mem->page_count++] = page; |
ba4e7d97 TH |
69 | } |
70 | agp_be->mem = mem; | |
ba4e7d97 TH |
71 | |
72 | mem->is_flushed = 1; | |
73 | mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY; | |
74 | ||
d961db75 | 75 | ret = agp_bind_memory(mem, node->start); |
ba4e7d97 TH |
76 | if (ret) |
77 | printk(KERN_ERR TTM_PFX "AGP Bind memory failed.\n"); | |
78 | ||
79 | return ret; | |
80 | } | |
81 | ||
649bf3ca | 82 | static int ttm_agp_unbind(struct ttm_tt *ttm) |
ba4e7d97 | 83 | { |
649bf3ca | 84 | struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); |
ba4e7d97 | 85 | |
649bf3ca JG |
86 | if (agp_be->mem) { |
87 | if (agp_be->mem->is_bound) | |
88 | return agp_unbind_memory(agp_be->mem); | |
89 | agp_free_memory(agp_be->mem); | |
90 | agp_be->mem = NULL; | |
ba4e7d97 | 91 | } |
649bf3ca | 92 | return 0; |
ba4e7d97 TH |
93 | } |
94 | ||
649bf3ca | 95 | static void ttm_agp_destroy(struct ttm_tt *ttm) |
ba4e7d97 | 96 | { |
649bf3ca | 97 | struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); |
ba4e7d97 TH |
98 | |
99 | if (agp_be->mem) | |
649bf3ca | 100 | ttm_agp_unbind(ttm); |
dea7e0ac | 101 | ttm_tt_fini(ttm); |
ba4e7d97 TH |
102 | kfree(agp_be); |
103 | } | |
104 | ||
105 | static struct ttm_backend_func ttm_agp_func = { | |
ba4e7d97 TH |
106 | .bind = ttm_agp_bind, |
107 | .unbind = ttm_agp_unbind, | |
108 | .destroy = ttm_agp_destroy, | |
109 | }; | |
110 | ||
649bf3ca JG |
111 | struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev, |
112 | struct agp_bridge_data *bridge, | |
113 | unsigned long size, uint32_t page_flags, | |
114 | struct page *dummy_read_page) | |
ba4e7d97 TH |
115 | { |
116 | struct ttm_agp_backend *agp_be; | |
117 | ||
118 | agp_be = kmalloc(sizeof(*agp_be), GFP_KERNEL); | |
119 | if (!agp_be) | |
120 | return NULL; | |
121 | ||
122 | agp_be->mem = NULL; | |
123 | agp_be->bridge = bridge; | |
649bf3ca JG |
124 | agp_be->ttm.func = &ttm_agp_func; |
125 | ||
126 | if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) { | |
127 | return NULL; | |
128 | } | |
129 | ||
130 | return &agp_be->ttm; | |
ba4e7d97 | 131 | } |
649bf3ca | 132 | EXPORT_SYMBOL(ttm_agp_tt_create); |
ba4e7d97 | 133 | |
dea7e0ac JG |
134 | int ttm_agp_tt_populate(struct ttm_tt *ttm) |
135 | { | |
136 | if (ttm->state != tt_unpopulated) | |
137 | return 0; | |
138 | ||
139 | return ttm_pool_populate(ttm); | |
140 | } | |
141 | EXPORT_SYMBOL(ttm_agp_tt_populate); | |
142 | ||
143 | void ttm_agp_tt_unpopulate(struct ttm_tt *ttm) | |
144 | { | |
145 | ttm_pool_unpopulate(ttm); | |
146 | } | |
147 | EXPORT_SYMBOL(ttm_agp_tt_unpopulate); | |
148 | ||
ba4e7d97 | 149 | #endif |