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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

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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: stable/10/sys/dev/drm2/ttm/ttm_agp_backend.c 247835 2013-03-05 09:49:34Z kib $");
33__FBSDID("$FreeBSD: stable/10/sys/dev/drm2/ttm/ttm_agp_backend.c 275408 2014-12-02 14:09:54Z tijl $");
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 struct agp_memory *mem;
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;
54 struct agp_memory *mem;
55 int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
55 int ret;
56 unsigned i;
57
58 mem = agp_alloc_memory(agp_be->bridge, AGP_USER_MEMORY, ttm->num_pages);
59 if (unlikely(mem == NULL))
60 return -ENOMEM;
61
62 mem->page_count = 0;
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
69 mem->pages[mem->page_count++] = page;
64 agp_be->pages[i] = page;
65 }
71 agp_be->mem = mem;
66
73 mem->is_flushed = 1;
74 mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
75
76 ret = agp_bind_memory(mem, node->start);
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)
78 pr_err("AGP Bind memory failed\n");
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
87 if (agp_be->mem) {
88 if (agp_be->mem->is_bound)
89 return agp_unbind_memory(agp_be->mem);
90 agp_free_memory(agp_be->mem);
91 agp_be->mem = NULL;
92 }
93 return 0;
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
100 if (agp_be->mem)
101 ttm_agp_unbind(ttm);
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
121 agp_be->mem = NULL;
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