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