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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 <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include <dev/drm2/drmP.h>
36 #include <dev/drm2/ttm/ttm_module.h>
37 #include <dev/drm2/ttm/ttm_bo_driver.h>
38 #include <dev/drm2/ttm/ttm_page_alloc.h>
39 #ifdef TTM_HAS_AGP
40 #include <dev/drm2/ttm/ttm_placement.h>
41
42 struct ttm_agp_backend {
43         struct ttm_tt ttm;
44         vm_offset_t offset;
45         vm_page_t *pages;
46         device_t bridge;
47 };
48
49 MALLOC_DEFINE(M_TTM_AGP, "ttm_agp", "TTM AGP Backend");
50
51 static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
52 {
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;
55         int ret;
56         unsigned i;
57
58         for (i = 0; i < ttm->num_pages; i++) {
59                 vm_page_t page = ttm->pages[i];
60
61                 if (!page)
62                         page = ttm->dummy_read_page;
63
64                 agp_be->pages[i] = page;
65         }
66
67         agp_be->offset = node->start * PAGE_SIZE;
68         ret = -agp_bind_pages(agp_be->bridge, agp_be->pages,
69                               ttm->num_pages << PAGE_SHIFT, agp_be->offset);
70         if (ret)
71                 printf("[TTM] AGP Bind memory failed\n");
72
73         return ret;
74 }
75
76 static int ttm_agp_unbind(struct ttm_tt *ttm)
77 {
78         struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
79
80         return -agp_unbind_pages(agp_be->bridge, ttm->num_pages << PAGE_SHIFT,
81                                  agp_be->offset);
82 }
83
84 static void ttm_agp_destroy(struct ttm_tt *ttm)
85 {
86         struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
87
88         ttm_tt_fini(ttm);
89         free(agp_be->pages, M_TTM_AGP);
90         free(agp_be, M_TTM_AGP);
91 }
92
93 static struct ttm_backend_func ttm_agp_func = {
94         .bind = ttm_agp_bind,
95         .unbind = ttm_agp_unbind,
96         .destroy = ttm_agp_destroy,
97 };
98
99 struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
100                                  device_t bridge,
101                                  unsigned long size, uint32_t page_flags,
102                                  vm_page_t dummy_read_page)
103 {
104         struct ttm_agp_backend *agp_be;
105
106         agp_be = malloc(sizeof(*agp_be), M_TTM_AGP, M_WAITOK | M_ZERO);
107
108         agp_be->bridge = bridge;
109         agp_be->ttm.func = &ttm_agp_func;
110
111         if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
112                 free(agp_be, M_TTM_AGP);
113                 return NULL;
114         }
115
116         agp_be->offset = 0;
117         agp_be->pages = malloc(agp_be->ttm.num_pages * sizeof(*agp_be->pages),
118                                M_TTM_AGP, M_WAITOK);
119
120         return &agp_be->ttm;
121 }
122
123 int ttm_agp_tt_populate(struct ttm_tt *ttm)
124 {
125         if (ttm->state != tt_unpopulated)
126                 return 0;
127
128         return ttm_pool_populate(ttm);
129 }
130
131 void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
132 {
133         ttm_pool_unpopulate(ttm);
134 }
135
136 #endif