1 /* ati_pcigart.h -- ATI PCI GART support -*- linux-c -*-
2 * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25 * DEALINGS IN THE SOFTWARE.
28 * Gareth Hughes <gareth@valinux.com>
33 #include "dev/drm/drmP.h"
36 # define ATI_PCIGART_TABLE_ORDER 2
37 # define ATI_PCIGART_TABLE_PAGES (1 << 2)
38 #elif PAGE_SIZE == 4096
39 # define ATI_PCIGART_TABLE_ORDER 3
40 # define ATI_PCIGART_TABLE_PAGES (1 << 3)
42 # error - PAGE_SIZE not 8K or 4K
45 # define ATI_MAX_PCIGART_PAGES 8192 /* 32 MB aperture, 4K pages */
46 # define ATI_PCIGART_PAGE_SIZE 4096 /* PCI GART page size */
48 int drm_ati_pcigart_init(drm_device_t *dev, unsigned long *addr,
51 drm_sg_mem_t *entry = dev->sg;
52 unsigned long address = 0;
54 u32 *pci_gart=0, page_base, bus_address = 0;
58 DRM_ERROR( "no scatter/gather memory!\n" );
62 address = (long)contigmalloc((1 << ATI_PCIGART_TABLE_ORDER) * PAGE_SIZE,
63 M_DRM, M_NOWAIT, 0ul, 0xfffffffful, PAGE_SIZE, 0);
65 DRM_ERROR( "cannot allocate PCI GART page!\n" );
69 /* XXX: we need to busdma this */
70 bus_address = vtophys( address );
72 pci_gart = (u32 *)address;
74 pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES )
75 ? entry->pages : ATI_MAX_PCIGART_PAGES;
77 bzero( pci_gart, ATI_MAX_PCIGART_PAGES * sizeof(u32) );
79 for ( i = 0 ; i < pages ; i++ ) {
80 entry->busaddr[i] = vtophys( entry->handle + (i*PAGE_SIZE) );
81 page_base = (u32) entry->busaddr[i];
83 for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
84 *pci_gart++ = cpu_to_le32( page_base );
85 page_base += ATI_PCIGART_PAGE_SIZE;
95 *bus_addr = bus_address;
99 int drm_ati_pcigart_cleanup(drm_device_t *dev, unsigned long addr,
102 drm_sg_mem_t *entry = dev->sg;
104 /* we need to support large memory configurations */
106 DRM_ERROR( "no scatter/gather memory!\n" );
110 #if __FreeBSD_version > 500000
111 /* Not available on 4.x */
112 contigfree((void *)addr, (1 << ATI_PCIGART_TABLE_ORDER) * PAGE_SIZE,