diff options
Diffstat (limited to 'sys/dev/drm/ati_pcigart.c')
-rw-r--r-- | sys/dev/drm/ati_pcigart.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/sys/dev/drm/ati_pcigart.c b/sys/dev/drm/ati_pcigart.c new file mode 100644 index 0000000..df8e5da --- /dev/null +++ b/sys/dev/drm/ati_pcigart.c @@ -0,0 +1,116 @@ +/* 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> + * + * $FreeBSD$ + */ + +#include "dev/drm/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; +} |