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ba4e7d97 TH |
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 | ||
25d0479a JP |
32 | #define pr_fmt(fmt) "[TTM] " fmt |
33 | ||
760285e7 DH |
34 | #include <drm/ttm/ttm_module.h> |
35 | #include <drm/ttm/ttm_bo_driver.h> | |
36 | #include <drm/ttm/ttm_page_alloc.h> | |
ba4e7d97 | 37 | #ifdef TTM_HAS_AGP |
760285e7 | 38 | #include <drm/ttm/ttm_placement.h> |
ba4e7d97 TH |
39 | #include <linux/agp_backend.h> |
40 | #include <linux/module.h> | |
5a0e3ad6 | 41 | #include <linux/slab.h> |
ba4e7d97 TH |
42 | #include <linux/io.h> |
43 | #include <asm/agp.h> | |
44 | ||
45 | struct ttm_agp_backend { | |
649bf3ca | 46 | struct ttm_tt ttm; |
ba4e7d97 TH |
47 | struct agp_memory *mem; |
48 | struct agp_bridge_data *bridge; | |
49 | }; | |
50 | ||
649bf3ca | 51 | static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem) |
ba4e7d97 | 52 | { |
649bf3ca JG |
53 | struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); |
54 | struct drm_mm_node *node = bo_mem->mm_node; | |
ba4e7d97 | 55 | struct agp_memory *mem; |
649bf3ca JG |
56 | int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED); |
57 | unsigned i; | |
ba4e7d97 | 58 | |
649bf3ca | 59 | mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY); |
ba4e7d97 TH |
60 | if (unlikely(mem == NULL)) |
61 | return -ENOMEM; | |
62 | ||
63 | mem->page_count = 0; | |
649bf3ca JG |
64 | for (i = 0; i < ttm->num_pages; i++) { |
65 | struct page *page = ttm->pages[i]; | |
66 | ||
ba4e7d97 | 67 | if (!page) |
649bf3ca | 68 | page = ttm->dummy_read_page; |
ba4e7d97 | 69 | |
07613ba2 | 70 | mem->pages[mem->page_count++] = page; |
ba4e7d97 TH |
71 | } |
72 | agp_be->mem = mem; | |
ba4e7d97 TH |
73 | |
74 | mem->is_flushed = 1; | |
75 | mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY; | |
76 | ||
d961db75 | 77 | ret = agp_bind_memory(mem, node->start); |
ba4e7d97 | 78 | if (ret) |
25d0479a | 79 | pr_err("AGP Bind memory failed\n"); |
ba4e7d97 TH |
80 | |
81 | return ret; | |
82 | } | |
83 | ||
649bf3ca | 84 | static int ttm_agp_unbind(struct ttm_tt *ttm) |
ba4e7d97 | 85 | { |
649bf3ca | 86 | struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); |
ba4e7d97 | 87 | |
649bf3ca JG |
88 | if (agp_be->mem) { |
89 | if (agp_be->mem->is_bound) | |
90 | return agp_unbind_memory(agp_be->mem); | |
91 | agp_free_memory(agp_be->mem); | |
92 | agp_be->mem = NULL; | |
ba4e7d97 | 93 | } |
649bf3ca | 94 | return 0; |
ba4e7d97 TH |
95 | } |
96 | ||
649bf3ca | 97 | static void ttm_agp_destroy(struct ttm_tt *ttm) |
ba4e7d97 | 98 | { |
649bf3ca | 99 | struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm); |
ba4e7d97 TH |
100 | |
101 | if (agp_be->mem) | |
649bf3ca | 102 | ttm_agp_unbind(ttm); |
dea7e0ac | 103 | ttm_tt_fini(ttm); |
ba4e7d97 TH |
104 | kfree(agp_be); |
105 | } | |
106 | ||
107 | static struct ttm_backend_func ttm_agp_func = { | |
ba4e7d97 TH |
108 | .bind = ttm_agp_bind, |
109 | .unbind = ttm_agp_unbind, | |
110 | .destroy = ttm_agp_destroy, | |
111 | }; | |
112 | ||
649bf3ca JG |
113 | struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev, |
114 | struct agp_bridge_data *bridge, | |
115 | unsigned long size, uint32_t page_flags, | |
116 | struct page *dummy_read_page) | |
ba4e7d97 TH |
117 | { |
118 | struct ttm_agp_backend *agp_be; | |
119 | ||
120 | agp_be = kmalloc(sizeof(*agp_be), GFP_KERNEL); | |
121 | if (!agp_be) | |
122 | return NULL; | |
123 | ||
124 | agp_be->mem = NULL; | |
125 | agp_be->bridge = bridge; | |
649bf3ca JG |
126 | agp_be->ttm.func = &ttm_agp_func; |
127 | ||
128 | if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) { | |
7a444d1f | 129 | kfree(agp_be); |
649bf3ca JG |
130 | return NULL; |
131 | } | |
132 | ||
133 | return &agp_be->ttm; | |
ba4e7d97 | 134 | } |
649bf3ca | 135 | EXPORT_SYMBOL(ttm_agp_tt_create); |
ba4e7d97 | 136 | |
dea7e0ac JG |
137 | int ttm_agp_tt_populate(struct ttm_tt *ttm) |
138 | { | |
139 | if (ttm->state != tt_unpopulated) | |
140 | return 0; | |
141 | ||
142 | return ttm_pool_populate(ttm); | |
143 | } | |
144 | EXPORT_SYMBOL(ttm_agp_tt_populate); | |
145 | ||
146 | void ttm_agp_tt_unpopulate(struct ttm_tt *ttm) | |
147 | { | |
148 | ttm_pool_unpopulate(ttm); | |
149 | } | |
150 | EXPORT_SYMBOL(ttm_agp_tt_unpopulate); | |
151 | ||
ba4e7d97 | 152 | #endif |