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);