blob: 3302f99e7497002edf15f842d1b0abcebb71fbe4 [file] [log] [blame]
Thomas Hellstromba4e7d92009-06-10 15:20:19 +02001/**************************************************************************
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
Joe Perches25d04792012-03-16 21:43:50 -070032#define pr_fmt(fmt) "[TTM] " fmt
33
David Howells760285e2012-10-02 18:01:07 +010034#include <drm/ttm/ttm_module.h>
35#include <drm/ttm/ttm_bo_driver.h>
36#include <drm/ttm/ttm_page_alloc.h>
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020037#ifdef TTM_HAS_AGP
David Howells760285e2012-10-02 18:01:07 +010038#include <drm/ttm/ttm_placement.h>
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020039#include <linux/agp_backend.h>
40#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090041#include <linux/slab.h>
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020042#include <linux/io.h>
43#include <asm/agp.h>
44
45struct ttm_agp_backend {
Jerome Glisse649bf3c2011-11-01 20:46:13 -040046 struct ttm_tt ttm;
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020047 struct agp_memory *mem;
48 struct agp_bridge_data *bridge;
49};
50
Jerome Glisse649bf3c2011-11-01 20:46:13 -040051static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020052{
Jerome Glisse649bf3c2011-11-01 20:46:13 -040053 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
54 struct drm_mm_node *node = bo_mem->mm_node;
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020055 struct agp_memory *mem;
Jerome Glisse649bf3c2011-11-01 20:46:13 -040056 int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
57 unsigned i;
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020058
Jerome Glisse649bf3c2011-11-01 20:46:13 -040059 mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY);
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020060 if (unlikely(mem == NULL))
61 return -ENOMEM;
62
63 mem->page_count = 0;
Jerome Glisse649bf3c2011-11-01 20:46:13 -040064 for (i = 0; i < ttm->num_pages; i++) {
65 struct page *page = ttm->pages[i];
66
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020067 if (!page)
Jerome Glisse649bf3c2011-11-01 20:46:13 -040068 page = ttm->dummy_read_page;
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020069
Dave Airlie07613ba2009-06-12 14:11:41 +100070 mem->pages[mem->page_count++] = page;
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020071 }
72 agp_be->mem = mem;
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020073
74 mem->is_flushed = 1;
75 mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
76
Ben Skeggsd961db72010-08-05 10:48:18 +100077 ret = agp_bind_memory(mem, node->start);
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020078 if (ret)
Joe Perches25d04792012-03-16 21:43:50 -070079 pr_err("AGP Bind memory failed\n");
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020080
81 return ret;
82}
83
Jerome Glisse649bf3c2011-11-01 20:46:13 -040084static int ttm_agp_unbind(struct ttm_tt *ttm)
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020085{
Jerome Glisse649bf3c2011-11-01 20:46:13 -040086 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020087
Jerome Glisse649bf3c2011-11-01 20:46:13 -040088 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;
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020093 }
Jerome Glisse649bf3c2011-11-01 20:46:13 -040094 return 0;
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020095}
96
Jerome Glisse649bf3c2011-11-01 20:46:13 -040097static void ttm_agp_destroy(struct ttm_tt *ttm)
Thomas Hellstromba4e7d92009-06-10 15:20:19 +020098{
Jerome Glisse649bf3c2011-11-01 20:46:13 -040099 struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
Thomas Hellstromba4e7d92009-06-10 15:20:19 +0200100
101 if (agp_be->mem)
Jerome Glisse649bf3c2011-11-01 20:46:13 -0400102 ttm_agp_unbind(ttm);
Jerome Glissedea7e0a2012-01-03 17:37:37 -0500103 ttm_tt_fini(ttm);
Thomas Hellstromba4e7d92009-06-10 15:20:19 +0200104 kfree(agp_be);
105}
106
107static struct ttm_backend_func ttm_agp_func = {
Thomas Hellstromba4e7d92009-06-10 15:20:19 +0200108 .bind = ttm_agp_bind,
109 .unbind = ttm_agp_unbind,
110 .destroy = ttm_agp_destroy,
111};
112
Jerome Glisse649bf3c2011-11-01 20:46:13 -0400113struct 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)
Thomas Hellstromba4e7d92009-06-10 15:20:19 +0200117{
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;
Jerome Glisse649bf3c2011-11-01 20:46:13 -0400126 agp_be->ttm.func = &ttm_agp_func;
127
128 if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
129 return NULL;
130 }
131
132 return &agp_be->ttm;
Thomas Hellstromba4e7d92009-06-10 15:20:19 +0200133}
Jerome Glisse649bf3c2011-11-01 20:46:13 -0400134EXPORT_SYMBOL(ttm_agp_tt_create);
Thomas Hellstromba4e7d92009-06-10 15:20:19 +0200135
Jerome Glissedea7e0a2012-01-03 17:37:37 -0500136int ttm_agp_tt_populate(struct ttm_tt *ttm)
137{
138 if (ttm->state != tt_unpopulated)
139 return 0;
140
141 return ttm_pool_populate(ttm);
142}
143EXPORT_SYMBOL(ttm_agp_tt_populate);
144
145void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
146{
147 ttm_pool_unpopulate(ttm);
148}
149EXPORT_SYMBOL(ttm_agp_tt_unpopulate);
150
Thomas Hellstromba4e7d92009-06-10 15:20:19 +0200151#endif