#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
# define ATI_PCIGART_PAGE_SIZE 4096
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,
DRM(M_DRM), M_NOWAIT, 0ul, 0xfffffffful, PAGE_SIZE, 0);
if ( !address ) {
DRM_ERROR( "cannot allocate PCI GART page!\n" );
goto done;
}
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;
if ( !entry ) {
DRM_ERROR( "no scatter/gather memory!\n" );
return 0;
}
#if __FreeBSD_version > 500000
contigfree( (void *)addr, (1 << ATI_PCIGART_TABLE_ORDER) * PAGE_SIZE, DRM(M_DRM));
#endif
return 1;
}