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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#define pr_fmt(fmt) "[TTM] " fmt
33
34#include <drm/ttm/ttm_module.h>
35#include <drm/ttm/ttm_bo_driver.h>
36#include <drm/ttm/ttm_page_alloc.h>
37#ifdef TTM_HAS_AGP
38#include <drm/ttm/ttm_placement.h>
39#include <linux/agp_backend.h>
40#include <linux/module.h>
41#include <linux/slab.h>
42#include <linux/io.h>
43#include <asm/agp.h>
44
45struct ttm_agp_backend {
46 struct ttm_tt ttm;
47 struct agp_memory *mem;
48 struct agp_bridge_data *bridge;
49};
50
51static 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 struct agp_memory *mem;
56 int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
57 unsigned i;
58
59 mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY);
60 if (unlikely(mem == NULL))
61 return -ENOMEM;
62
63 mem->page_count = 0;
64 for (i = 0; i < ttm->num_pages; i++) {
65 struct page *page = ttm->pages[i];
66
67 if (!page)
68 page = ttm->dummy_read_page;
69
70 mem->pages[mem->page_count++] = page;
71 }
72 agp_be->mem = mem;
73
74 mem->is_flushed = 1;
75 mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
76
77 ret = agp_bind_memory(mem, node->start);
78 if (ret)
79 pr_err("AGP Bind memory failed\n");
80
81 return ret;
82}
83
84static int ttm_agp_unbind(struct ttm_tt *ttm)
85{
86 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
87
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;
93 }
94 return 0;
95}
96
97static void ttm_agp_destroy(struct ttm_tt *ttm)
98{
99 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
100
101 if (agp_be->mem)
102 ttm_agp_unbind(ttm);
103 ttm_tt_fini(ttm);
104 kfree(agp_be);
105}
106
107static struct ttm_backend_func ttm_agp_func = {
108 .bind = ttm_agp_bind,
109 .unbind = ttm_agp_unbind,
110 .destroy = ttm_agp_destroy,
111};
112
113struct 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)
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;
126 agp_be->ttm.func = &ttm_agp_func;
127
128 if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
129 kfree(agp_be);
130 return NULL;
131 }
132
133 return &agp_be->ttm;
134}
135EXPORT_SYMBOL(ttm_agp_tt_create);
136
137int 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}
144EXPORT_SYMBOL(ttm_agp_tt_populate);
145
146void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
147{
148 ttm_pool_unpopulate(ttm);
149}
150EXPORT_SYMBOL(ttm_agp_tt_unpopulate);
151
152#endif
1/* SPDX-License-Identifier: GPL-2.0 OR MIT */
2/**************************************************************************
3 *
4 * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
25 * USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28/*
29 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
30 * Keith Packard.
31 */
32
33#define pr_fmt(fmt) "[TTM] " fmt
34
35#include <drm/ttm/ttm_module.h>
36#include <drm/ttm/ttm_bo_driver.h>
37#include <drm/ttm/ttm_page_alloc.h>
38#include <drm/ttm/ttm_placement.h>
39#include <linux/agp_backend.h>
40#include <linux/module.h>
41#include <linux/slab.h>
42#include <linux/io.h>
43#include <asm/agp.h>
44
45struct ttm_agp_backend {
46 struct ttm_tt ttm;
47 struct agp_memory *mem;
48 struct agp_bridge_data *bridge;
49};
50
51static 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 page *dummy_read_page = ttm_bo_glob.dummy_read_page;
55 struct drm_mm_node *node = bo_mem->mm_node;
56 struct agp_memory *mem;
57 int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
58 unsigned i;
59
60 mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY);
61 if (unlikely(mem == NULL))
62 return -ENOMEM;
63
64 mem->page_count = 0;
65 for (i = 0; i < ttm->num_pages; i++) {
66 struct page *page = ttm->pages[i];
67
68 if (!page)
69 page = dummy_read_page;
70
71 mem->pages[mem->page_count++] = page;
72 }
73 agp_be->mem = mem;
74
75 mem->is_flushed = 1;
76 mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
77
78 ret = agp_bind_memory(mem, node->start);
79 if (ret)
80 pr_err("AGP Bind memory failed\n");
81
82 return ret;
83}
84
85static void ttm_agp_unbind(struct ttm_tt *ttm)
86{
87 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
88
89 if (agp_be->mem) {
90 if (agp_be->mem->is_bound) {
91 agp_unbind_memory(agp_be->mem);
92 return;
93 }
94 agp_free_memory(agp_be->mem);
95 agp_be->mem = NULL;
96 }
97}
98
99static void ttm_agp_destroy(struct ttm_tt *ttm)
100{
101 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
102
103 if (agp_be->mem)
104 ttm_agp_unbind(ttm);
105 ttm_tt_fini(ttm);
106 kfree(agp_be);
107}
108
109static struct ttm_backend_func ttm_agp_func = {
110 .bind = ttm_agp_bind,
111 .unbind = ttm_agp_unbind,
112 .destroy = ttm_agp_destroy,
113};
114
115struct ttm_tt *ttm_agp_tt_create(struct ttm_buffer_object *bo,
116 struct agp_bridge_data *bridge,
117 uint32_t page_flags)
118{
119 struct ttm_agp_backend *agp_be;
120
121 agp_be = kmalloc(sizeof(*agp_be), GFP_KERNEL);
122 if (!agp_be)
123 return NULL;
124
125 agp_be->mem = NULL;
126 agp_be->bridge = bridge;
127 agp_be->ttm.func = &ttm_agp_func;
128
129 if (ttm_tt_init(&agp_be->ttm, bo, page_flags)) {
130 kfree(agp_be);
131 return NULL;
132 }
133
134 return &agp_be->ttm;
135}
136EXPORT_SYMBOL(ttm_agp_tt_create);
137
138int ttm_agp_tt_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
139{
140 if (ttm->state != tt_unpopulated)
141 return 0;
142
143 return ttm_pool_populate(ttm, ctx);
144}
145EXPORT_SYMBOL(ttm_agp_tt_populate);
146
147void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
148{
149 ttm_pool_unpopulate(ttm);
150}
151EXPORT_SYMBOL(ttm_agp_tt_unpopulate);