1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/**
* \file ati_pcigart.c
* ATI PCI GART support
*
* \author Gareth Hughes <gareth@valinux.com>
*/
/*
* Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
*
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "drmP.h"
#if PAGE_SIZE == 65536
# define ATI_PCIGART_TABLE_ORDER 0
# define ATI_PCIGART_TABLE_PAGES (1 << 0)
#elif PAGE_SIZE == 16384
# define ATI_PCIGART_TABLE_ORDER 1
# define ATI_PCIGART_TABLE_PAGES (1 << 1)
#elif PAGE_SIZE == 8192
# define ATI_PCIGART_TABLE_ORDER 2
# define ATI_PCIGART_TABLE_PAGES (1 << 2)
#elif PAGE_SIZE == 4096
# define ATI_PCIGART_TABLE_ORDER 3
# define ATI_PCIGART_TABLE_PAGES (1 << 3)
#else
# error - PAGE_SIZE not 64K, 16K, 8K or 4K
#endif
# define ATI_MAX_PCIGART_PAGES 8192 /**< 32 MB aperture, 4K pages */
# define ATI_PCIGART_PAGE_SIZE 4096 /**< PCI GART page size */
static unsigned long drm_ati_alloc_pcigart_table(void)
{
unsigned long address;
struct page *page;
int i;
DRM_DEBUG("%s\n", __FUNCTION__);
address = __get_free_pages(GFP_KERNEL, ATI_PCIGART_TABLE_ORDER);
if (address == 0UL) {
return 0;
}
page = virt_to_page(address);
for (i = 0; i < ATI_PCIGART_TABLE_PAGES; i++, page++) {
get_page(page);
SetPageReserved(page);
}
DRM_DEBUG("%s: returning 0x%08lx\n", __FUNCTION__, address);
return address;
}
static void drm_ati_free_pcigart_table(unsigned long address)
{
struct page *page;
int i;
DRM_DEBUG("%s\n", __FUNCTION__);
page = virt_to_page(address);
for (i = 0; i < ATI_PCIGART_TABLE_PAGES; i++, page++) {
__put_page(page);
ClearPageReserved(page);
}
free_pages(address, ATI_PCIGART_TABLE_ORDER);
}
int drm_ati_pcigart_cleanup(drm_device_t * dev,
drm_ati_pcigart_info * gart_info)
{
drm_sg_mem_t *entry = dev->sg;
unsigned long pages;
int i;
/* we need to support large memory configurations */
if (!entry) {
DRM_ERROR("no scatter/gather memory!\n");
return 0;
}
if (gart_info->bus_addr) {
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
pci_unmap_single(dev->pdev, gart_info->bus_addr,
ATI_PCIGART_TABLE_PAGES * PAGE_SIZE,
PCI_DMA_TODEVICE);
}
pages = (entry->pages <= ATI_MAX_PCIGART_PAGES)
? entry->pages : ATI_MAX_PCIGART_PAGES;
for (i = 0; i < pages; i++) {
if (!entry->busaddr[i])
break;
pci_unmap_single(dev->pdev, entry->busaddr[i],
PAGE_SIZE, PCI_DMA_TODEVICE);
}
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN)
gart_info->bus_addr = 0;
}
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN
&& gart_info->addr) {
drm_ati_free_pcigart_table(gart_info->addr);
gart_info->addr = 0;
}
return 1;
}
EXPORT_SYMBOL(drm_ati_pcigart_cleanup);
int drm_ati_pcigart_init(drm_device_t * dev, drm_ati_pcigart_info * gart_info)
{
drm_sg_mem_t *entry = dev->sg;
unsigned long address = 0;
unsigned long pages;
u32 *pci_gart, page_base, bus_address = 0;
int i, j, ret = 0;
if (!entry) {
DRM_ERROR("no scatter/gather memory!\n");
goto done;
}
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
address = drm_ati_alloc_pcigart_table();
if (!address) {
DRM_ERROR("cannot allocate PCI GART page!\n");
goto done;
}
if (!dev->pdev) {
DRM_ERROR("PCI device unknown!\n");
goto done;
}
bus_address = pci_map_single(dev->pdev, (void *)address,
ATI_PCIGART_TABLE_PAGES *
PAGE_SIZE, PCI_DMA_TODEVICE);
if (bus_address == 0) {
DRM_ERROR("unable to map PCIGART pages!\n");
drm_ati_free_pcigart_table(address);
address = 0;
goto done;
}
} else {
address = gart_info->addr;
bus_address = gart_info->bus_addr;
DRM_DEBUG("PCI: Gart Table: VRAM %08X mapped at %08lX\n",
bus_address, address);
}
pci_gart = (u32 *) address;
pages = (entry->pages <= ATI_MAX_PCIGART_PAGES)
? entry->pages : ATI_MAX_PCIGART_PAGES;
memset(pci_gart, 0, ATI_MAX_PCIGART_PAGES * sizeof(u32));
for (i = 0; i < pages; i++) {
/* we need to support large memory configurations */
entry->busaddr[i] = pci_map_single(dev->pdev,
page_address(entry->
pagelist[i]),
PAGE_SIZE, PCI_DMA_TODEVICE);
if (entry->busaddr[i] == 0) {
DRM_ERROR("unable to map PCIGART pages!\n");
drm_ati_pcigart_cleanup(dev, gart_info);
address = 0;
bus_address = 0;
goto done;
}
page_base = (u32) entry->busaddr[i];
for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
if (gart_info->is_pcie)
*pci_gart = (cpu_to_le32(page_base) >> 8) | 0xc;
else
*pci_gart++ = cpu_to_le32(page_base);
page_base += ATI_PCIGART_PAGE_SIZE;
}
}
ret = 1;
#if defined(__i386__) || defined(__x86_64__)
wbinvd();
#else
mb();
#endif
done:
gart_info->addr = address;
gart_info->bus_addr = bus_address;
return ret;
}
EXPORT_SYMBOL(drm_ati_pcigart_init);
|
