151 lines
4.1 KiB
C
151 lines
4.1 KiB
C
/* ati_pcigart.h -- ATI PCI GART support -*- linux-c -*-
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* Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
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*
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Gareth Hughes <gareth@valinux.com>
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*/
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#include "drmP.h"
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#if PAGE_SIZE == 8192
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# define ATI_PCIGART_TABLE_ORDER 2
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# define ATI_PCIGART_TABLE_PAGES (1 << 2)
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#elif PAGE_SIZE == 4096
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# define ATI_PCIGART_TABLE_ORDER 3
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# define ATI_PCIGART_TABLE_PAGES (1 << 3)
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#elif
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# error - PAGE_SIZE not 8K or 4K
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#endif
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# define ATI_MAX_PCIGART_PAGES 8192 /* 32 MB aperture, 4K pages */
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# define ATI_PCIGART_PAGE_SIZE 4096 /* PCI GART page size */
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static unsigned long DRM(ati_alloc_pcigart_table)( void )
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{
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unsigned long address;
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DRM_DEBUG( "\n" );
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address = (unsigned long) malloc( (1 << ATI_PCIGART_TABLE_ORDER) * PAGE_SIZE, DRM(M_DRM), M_WAITOK );
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DRM_DEBUG( "returning 0x%08lx\n", address );
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return address;
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}
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static void DRM(ati_free_pcigart_table)( unsigned long address )
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{
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DRM_DEBUG( "\n" );
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free( (void *)address, DRM(M_DRM));
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}
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int DRM(ati_pcigart_init)( drm_device_t *dev,
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unsigned long *addr,
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dma_addr_t *bus_addr)
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{
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drm_sg_mem_t *entry = dev->sg;
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unsigned long address = 0;
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unsigned long pages;
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u32 *pci_gart=0, page_base, bus_address = 0;
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int i, j, ret = 0;
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if ( !entry ) {
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DRM_ERROR( "no scatter/gather memory!\n" );
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goto done;
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}
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address = DRM(ati_alloc_pcigart_table)();
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if ( !address ) {
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DRM_ERROR( "cannot allocate PCI GART page!\n" );
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goto done;
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}
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/* FIXME non-vtophys==bustophys-arches */
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bus_address = vtophys( address );
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/*pci_map_single(dev->pdev, (void *)address,
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ATI_PCIGART_TABLE_PAGES * PAGE_SIZE,
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PCI_DMA_TODEVICE);*/
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/* if (bus_address == 0) {
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DRM_ERROR( "unable to map PCIGART pages!\n" );
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DRM(ati_free_pcigart_table)( (unsigned long)address );
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address = 0;
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goto done;
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}*/
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pci_gart = (u32 *)address;
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pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES )
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? entry->pages : ATI_MAX_PCIGART_PAGES;
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bzero( pci_gart, ATI_MAX_PCIGART_PAGES * sizeof(u32) );
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for ( i = 0 ; i < pages ; i++ ) {
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/* we need to support large memory configurations */
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/* FIXME non-vtophys==vtobus-arches */
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entry->busaddr[i] = vtophys( entry->handle + (i*PAGE_SIZE) );
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/* if (entry->busaddr[i] == 0) {
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DRM_ERROR( "unable to map PCIGART pages!\n" );
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DRM(ati_pcigart_cleanup)( dev, (unsigned long)address, bus_address );
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address = 0;
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bus_address = 0;
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goto done;
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}*/
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page_base = (u32) entry->busaddr[i];
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for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
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*pci_gart++ = cpu_to_le32( page_base );
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page_base += ATI_PCIGART_PAGE_SIZE;
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}
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}
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ret = 1;
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DRM_READMEMORYBARRIER();
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done:
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*addr = address;
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*bus_addr = bus_address;
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return ret;
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}
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int DRM(ati_pcigart_cleanup)( drm_device_t *dev,
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unsigned long addr,
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dma_addr_t bus_addr)
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{
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drm_sg_mem_t *entry = dev->sg;
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/* we need to support large memory configurations */
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if ( !entry ) {
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DRM_ERROR( "no scatter/gather memory!\n" );
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return 0;
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}
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if ( addr ) {
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DRM(ati_free_pcigart_table)( addr );
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}
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return 1;
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}
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