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author | Reinhard Tartler <siretart@tauware.de> | 2011-10-10 17:43:39 +0200 |
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committer | Reinhard Tartler <siretart@tauware.de> | 2011-10-10 17:43:39 +0200 |
commit | f4092abdf94af6a99aff944d6264bc1284e8bdd4 (patch) | |
tree | 2ac1c9cc16ceb93edb2c4382c088dac5aeafdf0f /nx-X11/extras/drm/linux-core/ati_pcigart.c | |
parent | a840692edc9c6d19cd7c057f68e39c7d95eb767d (diff) | |
download | nx-libs-f4092abdf94af6a99aff944d6264bc1284e8bdd4.tar.gz nx-libs-f4092abdf94af6a99aff944d6264bc1284e8bdd4.tar.bz2 nx-libs-f4092abdf94af6a99aff944d6264bc1284e8bdd4.zip |
Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1
Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:
Imported nx-X11-3.1.0-1.tar.gz
into Git repository
Diffstat (limited to 'nx-X11/extras/drm/linux-core/ati_pcigart.c')
-rw-r--r-- | nx-X11/extras/drm/linux-core/ati_pcigart.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/nx-X11/extras/drm/linux-core/ati_pcigart.c b/nx-X11/extras/drm/linux-core/ati_pcigart.c new file mode 100644 index 000000000..404c5b73a --- /dev/null +++ b/nx-X11/extras/drm/linux-core/ati_pcigart.c @@ -0,0 +1,228 @@ +/** + * \file ati_pcigart.c + * 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. + */ + +#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 void *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++) { + get_page(page); + SetPageReserved(page); + } + + DRM_DEBUG("%s: returning 0x%08lx\n", __FUNCTION__, address); + return (void *)address; +} + +static void drm_ati_free_pcigart_table(void *address) +{ + struct page *page; + int i; + DRM_DEBUG("%s\n", __FUNCTION__); + + page = virt_to_page((unsigned long)address); + + for (i = 0; i < ATI_PCIGART_TABLE_PAGES; i++, page++) { + __put_page(page); + ClearPageReserved(page); + } + + free_pages((unsigned long)address, ATI_PCIGART_TABLE_ORDER); +} + +int drm_ati_pcigart_init(drm_device_t * dev, drm_ati_pcigart_info *gart_info) +{ + drm_sg_mem_t *entry = dev->sg; + void *address = NULL; + 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; + } + + if (gart_info->gart_table_location==DRM_ATI_GART_MAIN) + { + DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n"); + + 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, 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; + } + } + else + { + address = gart_info->addr; + bus_address = gart_info->bus_addr; + DRM_DEBUG("PCI: Gart Table: VRAM %08X mapped at %08lX\n", bus_address, (unsigned long)address); + } + + 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, gart_info); + address = NULL; + bus_address = 0; + goto done; + } + page_base = (u32) entry->busaddr[i]; + + for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) { + if (gart_info->is_pcie) + *pci_gart = (cpu_to_le32(page_base)>>8) | 0xc; + else + *pci_gart = cpu_to_le32(page_base); + pci_gart++; + page_base += ATI_PCIGART_PAGE_SIZE; + } + } + + ret = 1; + +#if defined(__i386__) || defined(__x86_64__) + wbinvd(); +#else + mb(); +#endif + + done: + gart_info->addr = address; + gart_info->bus_addr = bus_address; + return ret; +} +EXPORT_SYMBOL(drm_ati_pcigart_init); + +int drm_ati_pcigart_cleanup(drm_device_t * dev, drm_ati_pcigart_info *gart_info) +{ + 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 (gart_info->bus_addr) { + if (gart_info->gart_table_location==DRM_ATI_GART_MAIN) { + pci_unmap_single(dev->pdev, gart_info->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 (gart_info->gart_table_location==DRM_ATI_GART_MAIN) + gart_info->bus_addr=0; + } + + + if (gart_info->gart_table_location==DRM_ATI_GART_MAIN && gart_info->addr) { + drm_ati_free_pcigart_table(gart_info->addr); + gart_info->addr=0; + } + + return 1; +} +EXPORT_SYMBOL(drm_ati_pcigart_cleanup); + |