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
42struct ttm_agp_backend {
43	struct ttm_tt ttm;
44	vm_offset_t offset;
45	vm_page_t *pages;
46	device_t bridge;
47};
48
49MALLOC_DEFINE(M_TTM_AGP, "ttm_agp", "TTM AGP Backend");
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	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
76static 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
84static 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
93static struct ttm_backend_func ttm_agp_func = {
94	.bind = ttm_agp_bind,
95	.unbind = ttm_agp_unbind,
96	.destroy = ttm_agp_destroy,
97};
98
99struct 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
123int 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
131void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
132{
133	ttm_pool_unpopulate(ttm);
134}
135
136#endif
137