drm/ttm: Move headers to <include/drm/ttm>
[dragonfly.git] / sys / dev / drm / ttm / ttm_agp_backend.c
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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 * $FreeBSD: head/sys/dev/drm2/ttm/ttm_agp_backend.c 247835 2013-03-05 09:49:34Z kib $
32 */
33
18e26a6d 34#include <drm/drmP.h>
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35#include <drm/ttm/ttm_module.h>
36#include <drm/ttm/ttm_bo_driver.h>
37#include <drm/ttm/ttm_page_alloc.h>
5c9d63cf 38#ifdef TTM_HAS_AGP
216f7a2c 39#include <drm/ttm/ttm_placement.h>
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40
41struct ttm_agp_backend {
42 struct ttm_tt ttm;
43 struct agp_memory *mem;
44 device_t bridge;
45};
46
47MALLOC_DEFINE(M_TTM_AGP, "ttm_agp", "TTM AGP Backend");
48
49static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
50{
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;
53 struct agp_memory *mem;
54 int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
55 unsigned i;
56
57 mem = agp_alloc_memory(agp_be->bridge, AGP_USER_MEMORY, ttm->num_pages);
58 if (unlikely(mem == NULL))
59 return -ENOMEM;
60
61 mem->page_count = 0;
62 for (i = 0; i < ttm->num_pages; i++) {
63 vm_page_t page = ttm->pages[i];
64
65 if (!page)
66 page = ttm->dummy_read_page;
67
68 mem->pages[mem->page_count++] = page;
69 }
70 agp_be->mem = mem;
71
72 mem->is_flushed = 1;
73 mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
74
75 ret = agp_bind_memory(mem, node->start);
76 if (ret)
77 pr_err("AGP Bind memory failed\n");
78
79 return ret;
80}
81
82static int ttm_agp_unbind(struct ttm_tt *ttm)
83{
84 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
85
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;
91 }
92 return 0;
93}
94
95static void ttm_agp_destroy(struct ttm_tt *ttm)
96{
97 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
98
99 if (agp_be->mem)
100 ttm_agp_unbind(ttm);
101 ttm_tt_fini(ttm);
926deccb 102 drm_free(agp_be, M_TTM_AGP);
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103}
104
105static struct ttm_backend_func ttm_agp_func = {
106 .bind = ttm_agp_bind,
107 .unbind = ttm_agp_unbind,
108 .destroy = ttm_agp_destroy,
109};
110
111struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
112 device_t bridge,
113 unsigned long size, uint32_t page_flags,
114 vm_page_t dummy_read_page)
115{
116 struct ttm_agp_backend *agp_be;
117
926deccb 118 agp_be = kmalloc(sizeof(*agp_be), M_TTM_AGP, M_WAITOK | M_ZERO);
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119
120 agp_be->mem = NULL;
121 agp_be->bridge = bridge;
122 agp_be->ttm.func = &ttm_agp_func;
123
124 if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
125 return NULL;
126 }
127
128 return &agp_be->ttm;
129}
130
131int ttm_agp_tt_populate(struct ttm_tt *ttm)
132{
133 if (ttm->state != tt_unpopulated)
134 return 0;
135
136 return ttm_pool_populate(ttm);
137}
138
139void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
140{
141 ttm_pool_unpopulate(ttm);
142}
143
144#endif