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1da177e4 LT |
1 | /** |
2 | * \file ati_pcigart.h | |
3 | * ATI PCI GART support | |
4 | * | |
5 | * \author Gareth Hughes <gareth@valinux.com> | |
6 | */ | |
7 | ||
8 | /* | |
9 | * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com | |
10 | * | |
11 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
12 | * All Rights Reserved. | |
13 | * | |
14 | * Permission is hereby granted, free of charge, to any person obtaining a | |
15 | * copy of this software and associated documentation files (the "Software"), | |
16 | * to deal in the Software without restriction, including without limitation | |
17 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
18 | * and/or sell copies of the Software, and to permit persons to whom the | |
19 | * Software is furnished to do so, subject to the following conditions: | |
20 | * | |
21 | * The above copyright notice and this permission notice (including the next | |
22 | * paragraph) shall be included in all copies or substantial portions of the | |
23 | * Software. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
26 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
27 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
28 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
29 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
30 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
31 | * DEALINGS IN THE SOFTWARE. | |
32 | */ | |
33 | ||
34 | #include "drmP.h" | |
35 | ||
36 | #if PAGE_SIZE == 65536 | |
37 | # define ATI_PCIGART_TABLE_ORDER 0 | |
38 | # define ATI_PCIGART_TABLE_PAGES (1 << 0) | |
39 | #elif PAGE_SIZE == 16384 | |
40 | # define ATI_PCIGART_TABLE_ORDER 1 | |
41 | # define ATI_PCIGART_TABLE_PAGES (1 << 1) | |
42 | #elif PAGE_SIZE == 8192 | |
43 | # define ATI_PCIGART_TABLE_ORDER 2 | |
44 | # define ATI_PCIGART_TABLE_PAGES (1 << 2) | |
45 | #elif PAGE_SIZE == 4096 | |
46 | # define ATI_PCIGART_TABLE_ORDER 3 | |
47 | # define ATI_PCIGART_TABLE_PAGES (1 << 3) | |
48 | #else | |
49 | # error - PAGE_SIZE not 64K, 16K, 8K or 4K | |
50 | #endif | |
51 | ||
52 | # define ATI_MAX_PCIGART_PAGES 8192 /**< 32 MB aperture, 4K pages */ | |
53 | # define ATI_PCIGART_PAGE_SIZE 4096 /**< PCI GART page size */ | |
54 | ||
c94f7029 | 55 | static unsigned long drm_ati_alloc_pcigart_table( void ) |
1da177e4 LT |
56 | { |
57 | unsigned long address; | |
58 | struct page *page; | |
59 | int i; | |
60 | DRM_DEBUG( "%s\n", __FUNCTION__ ); | |
61 | ||
62 | address = __get_free_pages( GFP_KERNEL, ATI_PCIGART_TABLE_ORDER ); | |
63 | if ( address == 0UL ) { | |
64 | return 0; | |
65 | } | |
66 | ||
67 | page = virt_to_page( address ); | |
68 | ||
69 | for ( i = 0 ; i < ATI_PCIGART_TABLE_PAGES ; i++, page++ ) { | |
70 | get_page(page); | |
71 | SetPageReserved( page ); | |
72 | } | |
73 | ||
74 | DRM_DEBUG( "%s: returning 0x%08lx\n", __FUNCTION__, address ); | |
75 | return address; | |
76 | } | |
77 | ||
78 | static void drm_ati_free_pcigart_table( unsigned long address ) | |
79 | { | |
80 | struct page *page; | |
81 | int i; | |
82 | DRM_DEBUG( "%s\n", __FUNCTION__ ); | |
83 | ||
84 | page = virt_to_page( address ); | |
85 | ||
86 | for ( i = 0 ; i < ATI_PCIGART_TABLE_PAGES ; i++, page++ ) { | |
87 | __put_page(page); | |
88 | ClearPageReserved( page ); | |
89 | } | |
90 | ||
91 | free_pages( address, ATI_PCIGART_TABLE_ORDER ); | |
92 | } | |
93 | ||
94 | int drm_ati_pcigart_cleanup( drm_device_t *dev, | |
95 | unsigned long addr, | |
96 | dma_addr_t bus_addr) | |
97 | { | |
98 | drm_sg_mem_t *entry = dev->sg; | |
99 | unsigned long pages; | |
100 | int i; | |
101 | ||
102 | /* we need to support large memory configurations */ | |
103 | if ( !entry ) { | |
104 | DRM_ERROR( "no scatter/gather memory!\n" ); | |
105 | return 0; | |
106 | } | |
107 | ||
108 | if ( bus_addr ) { | |
109 | pci_unmap_single(dev->pdev, bus_addr, | |
110 | ATI_PCIGART_TABLE_PAGES * PAGE_SIZE, | |
111 | PCI_DMA_TODEVICE); | |
112 | ||
113 | pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES ) | |
114 | ? entry->pages : ATI_MAX_PCIGART_PAGES; | |
115 | ||
116 | for ( i = 0 ; i < pages ; i++ ) { | |
117 | if ( !entry->busaddr[i] ) break; | |
118 | pci_unmap_single(dev->pdev, entry->busaddr[i], | |
119 | PAGE_SIZE, PCI_DMA_TODEVICE); | |
120 | } | |
121 | } | |
122 | ||
123 | if ( addr ) { | |
124 | drm_ati_free_pcigart_table( addr ); | |
125 | } | |
126 | ||
127 | return 1; | |
128 | } | |
129 | EXPORT_SYMBOL(drm_ati_pcigart_cleanup); | |
130 | ||
131 | int drm_ati_pcigart_init( drm_device_t *dev, | |
132 | unsigned long *addr, | |
133 | dma_addr_t *bus_addr) | |
134 | { | |
135 | drm_sg_mem_t *entry = dev->sg; | |
136 | unsigned long address = 0; | |
137 | unsigned long pages; | |
138 | u32 *pci_gart, page_base, bus_address = 0; | |
139 | int i, j, ret = 0; | |
140 | ||
141 | if ( !entry ) { | |
142 | DRM_ERROR( "no scatter/gather memory!\n" ); | |
143 | goto done; | |
144 | } | |
145 | ||
146 | address = drm_ati_alloc_pcigart_table(); | |
147 | if ( !address ) { | |
148 | DRM_ERROR( "cannot allocate PCI GART page!\n" ); | |
149 | goto done; | |
150 | } | |
151 | ||
152 | if ( !dev->pdev ) { | |
153 | DRM_ERROR( "PCI device unknown!\n" ); | |
154 | goto done; | |
155 | } | |
156 | ||
157 | bus_address = pci_map_single(dev->pdev, (void *)address, | |
158 | ATI_PCIGART_TABLE_PAGES * PAGE_SIZE, | |
159 | PCI_DMA_TODEVICE); | |
160 | if (bus_address == 0) { | |
161 | DRM_ERROR( "unable to map PCIGART pages!\n" ); | |
162 | drm_ati_free_pcigart_table( address ); | |
163 | address = 0; | |
164 | goto done; | |
165 | } | |
166 | ||
167 | pci_gart = (u32 *)address; | |
168 | ||
169 | pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES ) | |
170 | ? entry->pages : ATI_MAX_PCIGART_PAGES; | |
171 | ||
172 | memset( pci_gart, 0, ATI_MAX_PCIGART_PAGES * sizeof(u32) ); | |
173 | ||
174 | for ( i = 0 ; i < pages ; i++ ) { | |
175 | /* we need to support large memory configurations */ | |
176 | entry->busaddr[i] = pci_map_single(dev->pdev, | |
177 | page_address( entry->pagelist[i] ), | |
178 | PAGE_SIZE, | |
179 | PCI_DMA_TODEVICE); | |
180 | if (entry->busaddr[i] == 0) { | |
181 | DRM_ERROR( "unable to map PCIGART pages!\n" ); | |
182 | drm_ati_pcigart_cleanup( dev, address, bus_address ); | |
183 | address = 0; | |
184 | bus_address = 0; | |
185 | goto done; | |
186 | } | |
187 | page_base = (u32) entry->busaddr[i]; | |
188 | ||
189 | for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) { | |
190 | *pci_gart++ = cpu_to_le32( page_base ); | |
191 | page_base += ATI_PCIGART_PAGE_SIZE; | |
192 | } | |
193 | } | |
194 | ||
195 | ret = 1; | |
196 | ||
197 | #if defined(__i386__) || defined(__x86_64__) | |
198 | wbinvd(); | |
199 | #else | |
200 | mb(); | |
201 | #endif | |
202 | ||
203 | done: | |
204 | *addr = address; | |
205 | *bus_addr = bus_address; | |
206 | return ret; | |
207 | } | |
208 | EXPORT_SYMBOL(drm_ati_pcigart_init); |