5 * \author Gareth Hughes <gareth@valinux.com>
9 * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
12 * All Rights Reserved.
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:
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
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.
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)
49 # error - PAGE_SIZE not 64K, 16K, 8K or 4K
52 # define ATI_MAX_PCIGART_PAGES 8192 /**< 32 MB aperture, 4K pages */
53 # define ATI_PCIGART_PAGE_SIZE 4096 /**< PCI GART page size */
55 static unsigned long drm_ati_alloc_pcigart_table( void )
57 unsigned long address
;
60 DRM_DEBUG( "%s\n", __FUNCTION__
);
62 address
= __get_free_pages( GFP_KERNEL
, ATI_PCIGART_TABLE_ORDER
);
63 if ( address
== 0UL ) {
67 page
= virt_to_page( address
);
69 for ( i
= 0 ; i
< ATI_PCIGART_TABLE_PAGES
; i
++, page
++ ) {
71 SetPageReserved( page
);
74 DRM_DEBUG( "%s: returning 0x%08lx\n", __FUNCTION__
, address
);
78 static void drm_ati_free_pcigart_table( unsigned long address
)
82 DRM_DEBUG( "%s\n", __FUNCTION__
);
84 page
= virt_to_page( address
);
86 for ( i
= 0 ; i
< ATI_PCIGART_TABLE_PAGES
; i
++, page
++ ) {
88 ClearPageReserved( page
);
91 free_pages( address
, ATI_PCIGART_TABLE_ORDER
);
94 int drm_ati_pcigart_cleanup(drm_device_t
*dev
, drm_ati_pcigart_info
*gart_info
)
96 drm_sg_mem_t
*entry
= dev
->sg
;
100 /* we need to support large memory configurations */
102 DRM_ERROR( "no scatter/gather memory!\n" );
106 if (gart_info
->bus_addr
) {
107 if (gart_info
->gart_table_location
==DRM_ATI_GART_MAIN
) {
108 pci_unmap_single(dev
->pdev
, gart_info
->bus_addr
,
109 ATI_PCIGART_TABLE_PAGES
* PAGE_SIZE
,
113 pages
= ( entry
->pages
<= ATI_MAX_PCIGART_PAGES
)
114 ? entry
->pages
: ATI_MAX_PCIGART_PAGES
;
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
);
122 if (gart_info
->gart_table_location
==DRM_ATI_GART_MAIN
)
123 gart_info
->bus_addr
=0;
126 if (gart_info
->gart_table_location
==DRM_ATI_GART_MAIN
&& gart_info
->addr
) {
127 drm_ati_free_pcigart_table(gart_info
->addr
);
133 EXPORT_SYMBOL(drm_ati_pcigart_cleanup
);
135 int drm_ati_pcigart_init(drm_device_t
*dev
, drm_ati_pcigart_info
*gart_info
)
137 drm_sg_mem_t
*entry
= dev
->sg
;
138 unsigned long address
= 0;
140 u32
*pci_gart
, page_base
, bus_address
= 0;
144 DRM_ERROR( "no scatter/gather memory!\n" );
148 if (gart_info
->gart_table_location
== DRM_ATI_GART_MAIN
)
150 DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
152 address
= drm_ati_alloc_pcigart_table();
154 DRM_ERROR( "cannot allocate PCI GART page!\n" );
159 DRM_ERROR( "PCI device unknown!\n" );
163 bus_address
= pci_map_single(dev
->pdev
, (void *)address
,
164 ATI_PCIGART_TABLE_PAGES
* PAGE_SIZE
,
166 if (bus_address
== 0) {
167 DRM_ERROR( "unable to map PCIGART pages!\n" );
168 drm_ati_free_pcigart_table( address
);
175 address
= gart_info
->addr
;
176 bus_address
= gart_info
->bus_addr
;
177 DRM_DEBUG("PCI: Gart Table: VRAM %08X mapped at %08lX\n", bus_address
, address
);
180 pci_gart
= (u32
*)address
;
182 pages
= ( entry
->pages
<= ATI_MAX_PCIGART_PAGES
)
183 ? entry
->pages
: ATI_MAX_PCIGART_PAGES
;
185 memset( pci_gart
, 0, ATI_MAX_PCIGART_PAGES
* sizeof(u32
) );
187 for ( i
= 0 ; i
< pages
; i
++ ) {
188 /* we need to support large memory configurations */
189 entry
->busaddr
[i
] = pci_map_single(dev
->pdev
,
190 page_address( entry
->pagelist
[i
] ),
193 if (entry
->busaddr
[i
] == 0) {
194 DRM_ERROR( "unable to map PCIGART pages!\n" );
195 drm_ati_pcigart_cleanup(dev
, gart_info
);
200 page_base
= (u32
) entry
->busaddr
[i
];
202 for (j
= 0; j
< (PAGE_SIZE
/ ATI_PCIGART_PAGE_SIZE
); j
++) {
203 if (gart_info
->is_pcie
)
204 *pci_gart
= (cpu_to_le32(page_base
)>>8) | 0xc;
206 *pci_gart
++ = cpu_to_le32( page_base
);
207 page_base
+= ATI_PCIGART_PAGE_SIZE
;
213 #if defined(__i386__) || defined(__x86_64__)
220 gart_info
->addr
= address
;
221 gart_info
->bus_addr
= bus_address
;
224 EXPORT_SYMBOL(drm_ati_pcigart_init
);
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