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/* ati_pcigart.h -- ATI PCI GART support -*- linux-c -*-
* 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.
*
* Authors:
* Gareth Hughes <gareth@valinux.com>
*
*/
#include "drmP.h"
#if 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)
#elif
# error - PAGE_SIZE not 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 */
int drm_ati_pcigart_init(drm_device_t *dev, unsigned long *addr,
dma_addr_t *bus_addr)
{
drm_sg_mem_t *entry = dev->sg;
unsigned long address = 0;
unsigned long pages;
u32 *pci_gart=0, page_base, bus_address = 0;
int i, j, ret = 0;
if ( !entry ) {
DRM_ERROR( "no scatter/gather memory!\n" );
goto done;
}
address = (long)contigmalloc((1 << ATI_PCIGART_TABLE_ORDER) * PAGE_SIZE,
M_DRM, M_NOWAIT, 0ul, 0xfffffffful, PAGE_SIZE, 0);
if ( !address ) {
DRM_ERROR( "cannot allocate PCI GART page!\n" );
goto done;
}
/* XXX: we need to busdma this */
bus_address = vtophys( address );
pci_gart = (u32 *)address;
pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES )
? entry->pages : ATI_MAX_PCIGART_PAGES;
bzero( pci_gart, ATI_MAX_PCIGART_PAGES * sizeof(u32) );
for ( i = 0 ; i < pages ; i++ ) {
entry->busaddr[i] = vtophys( entry->handle + (i*PAGE_SIZE) );
page_base = (u32) entry->busaddr[i];
for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
*pci_gart++ = cpu_to_le32( page_base );
page_base += ATI_PCIGART_PAGE_SIZE;
}
}
DRM_MEMORYBARRIER();
ret = 1;
done:
*addr = address;
*bus_addr = bus_address;
return ret;
}
int drm_ati_pcigart_cleanup(drm_device_t *dev, unsigned long addr,
dma_addr_t bus_addr)
{
drm_sg_mem_t *entry = dev->sg;
/* we need to support large memory configurations */
if ( !entry ) {
DRM_ERROR( "no scatter/gather memory!\n" );
return 0;
}
#if __FreeBSD_version > 500000
/* Not available on 4.x */
contigfree((void *)addr, (1 << ATI_PCIGART_TABLE_ORDER) * PAGE_SIZE,
M_DRM);
#endif
return 1;
}
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