diff options
| -rw-r--r-- | linux/ati_pcigart.c | 207 | ||||
| -rw-r--r-- | linux/drm_mem.h | 54 |
2 files changed, 261 insertions, 0 deletions
diff --git a/linux/ati_pcigart.c b/linux/ati_pcigart.c new file mode 100644 index 00000000..b4f75128 --- /dev/null +++ b/linux/ati_pcigart.c @@ -0,0 +1,207 @@ +/** + * \file ati_pcigart.h + * ATI PCI GART support + * + * \author Gareth Hughes <gareth@valinux.com> + */ + +/* + * 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. + */ + +#define __NO_VERSION__ +#include "drmP.h" + +#if PAGE_SIZE == 65536 +# define ATI_PCIGART_TABLE_ORDER 0 +# define ATI_PCIGART_TABLE_PAGES (1 << 0) +#elif PAGE_SIZE == 16384 +# define ATI_PCIGART_TABLE_ORDER 1 +# define ATI_PCIGART_TABLE_PAGES (1 << 1) +#elif 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) +#else +# error - PAGE_SIZE not 64K, 16K, 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 */ + +static unsigned long drm_ati_alloc_pcigart_table( void ) +{ + unsigned long address; + struct page *page; + int i; + DRM_DEBUG( "%s\n", __FUNCTION__ ); + + address = __get_free_pages( GFP_KERNEL, ATI_PCIGART_TABLE_ORDER ); + if ( address == 0UL ) { + return 0; + } + + page = virt_to_page( address ); + + for ( i = 0 ; i < ATI_PCIGART_TABLE_PAGES ; i++, page++ ) { + atomic_inc( &page->count ); + SetPageReserved( page ); + } + + DRM_DEBUG( "%s: returning 0x%08lx\n", __FUNCTION__, address ); + return address; +} + +static void drm_ati_free_pcigart_table( unsigned long address ) +{ + struct page *page; + int i; + DRM_DEBUG( "%s\n", __FUNCTION__ ); + + page = virt_to_page( address ); + + for ( i = 0 ; i < ATI_PCIGART_TABLE_PAGES ; i++, page++ ) { + atomic_dec( &page->count ); + ClearPageReserved( page ); + } + + free_pages( address, ATI_PCIGART_TABLE_ORDER ); +} + +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, page_base, bus_address = 0; + int i, j, ret = 0; + + if ( !entry ) { + DRM_ERROR( "no scatter/gather memory!\n" ); + goto done; + } + + address = drm_ati_alloc_pcigart_table(); + if ( !address ) { + DRM_ERROR( "cannot allocate PCI GART page!\n" ); + goto done; + } + + if ( !dev->pdev ) { + DRM_ERROR( "PCI device unknown!\n" ); + goto done; + } + + bus_address = pci_map_single(dev->pdev, (void *)address, + ATI_PCIGART_TABLE_PAGES * PAGE_SIZE, + PCI_DMA_TODEVICE); + if (bus_address == 0) { + DRM_ERROR( "unable to map PCIGART pages!\n" ); + drm_ati_free_pcigart_table( address ); + address = 0; + goto done; + } + + pci_gart = (u32 *)address; + + pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES ) + ? entry->pages : ATI_MAX_PCIGART_PAGES; + + memset( pci_gart, 0, ATI_MAX_PCIGART_PAGES * sizeof(u32) ); + + for ( i = 0 ; i < pages ; i++ ) { + /* we need to support large memory configurations */ + entry->busaddr[i] = pci_map_single(dev->pdev, + page_address( entry->pagelist[i] ), + PAGE_SIZE, + PCI_DMA_TODEVICE); + if (entry->busaddr[i] == 0) { + DRM_ERROR( "unable to map PCIGART pages!\n" ); + drm_ati_pcigart_cleanup( dev, address, bus_address ); + address = 0; + bus_address = 0; + goto done; + } + 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; + } + } + + ret = 1; + +#if defined(__i386__) || defined(__x86_64__) + asm volatile ( "wbinvd" ::: "memory" ); +#else + mb(); +#endif + +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; + unsigned long pages; + int i; + + /* we need to support large memory configurations */ + if ( !entry ) { + DRM_ERROR( "no scatter/gather memory!\n" ); + return 0; + } + + if ( bus_addr ) { + pci_unmap_single(dev->pdev, bus_addr, + ATI_PCIGART_TABLE_PAGES * PAGE_SIZE, + PCI_DMA_TODEVICE); + + pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES ) + ? entry->pages : ATI_MAX_PCIGART_PAGES; + + for ( i = 0 ; i < pages ; i++ ) { + if ( !entry->busaddr[i] ) break; + pci_unmap_single(dev->pdev, entry->busaddr[i], + PAGE_SIZE, PCI_DMA_TODEVICE); + } + } + + if ( addr ) { + drm_ati_free_pcigart_table( addr ); + } + + return 1; +} diff --git a/linux/drm_mem.h b/linux/drm_mem.h new file mode 100644 index 00000000..6dce0ccc --- /dev/null +++ b/linux/drm_mem.h @@ -0,0 +1,54 @@ +/** + * \file drm_mem.h + * Memory management wrappers for DRM + * + * \author Rickard E. (Rik) Faith <faith@valinux.com> + * \author Gareth Hughes <gareth@valinux.com> + */ + +/* + * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. + * 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 + * VA LINUX SYSTEMS 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. + */ + + +#ifndef _DRM_MEMORY_H_ +#define _DRM_MEMORY_H_ + + +/** \name Prototypes */ +/*@{*/ + +extern void *drm_alloc(size_t size); +extern void *drm_realloc(void *ptr, size_t oldsize, size_t size); +extern void drm_free(void *ptr); +extern unsigned long drm_alloc_pages(int order); +extern void drm_free_pages(unsigned long address, int order); +extern void *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t *dev); +extern void *drm_ioremap_nocache(unsigned long offset, unsigned long size, drm_device_t *dev); +extern void drm_ioremapfree(void *pt, unsigned long size, drm_device_t *dev); + +/*@}*/ + + +#endif /* !_DRM_MEMORY_H_ */ |