diff options
Diffstat (limited to 'nx-X11/extras/drm/bsd-core/ati_pcigart.c')
| -rw-r--r-- | nx-X11/extras/drm/bsd-core/ati_pcigart.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/nx-X11/extras/drm/bsd-core/ati_pcigart.c b/nx-X11/extras/drm/bsd-core/ati_pcigart.c new file mode 100644 index 000000000..d48d0a80c --- /dev/null +++ b/nx-X11/extras/drm/bsd-core/ati_pcigart.c @@ -0,0 +1,100 @@ +/* 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> + * + */ + +#include "drmP.h" + +#define ATI_PCIGART_PAGE_SIZE 4096 /* PCI GART page size */ +#define ATI_MAX_PCIGART_PAGES 8192 /* 32 MB aperture, 4K pages */ +#define ATI_PCIGART_TABLE_SIZE 32768 + +int drm_ati_pcigart_init(drm_device_t *dev, drm_ati_pcigart_info *gart_info) +{ + unsigned long pages; + u32 *pci_gart = NULL, page_base; + int i, j; + + if (dev->sg == NULL) { + DRM_ERROR( "no scatter/gather memory!\n" ); + return 0; + } + + if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) { + /* GART table in system memory */ + dev->sg->dmah = drm_pci_alloc(dev, ATI_PCIGART_TABLE_SIZE, 0, + 0xfffffffful); + if (dev->sg->dmah == NULL) { + DRM_ERROR("cannot allocate PCI GART table!\n"); + return 0; + } + + gart_info->addr = (void *)dev->sg->dmah->vaddr; + gart_info->bus_addr = dev->sg->dmah->busaddr; + pci_gart = (u32 *)dev->sg->dmah->vaddr; + } else { + /* GART table in framebuffer memory */ + pci_gart = gart_info->addr; + } + + pages = DRM_MIN(dev->sg->pages, ATI_MAX_PCIGART_PAGES); + + bzero(pci_gart, ATI_PCIGART_TABLE_SIZE); + + KASSERT(PAGE_SIZE >= ATI_PCIGART_PAGE_SIZE, ("page size too small")); + + for ( i = 0 ; i < pages ; i++ ) { + page_base = (u32) dev->sg->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; + } + } + + DRM_MEMORYBARRIER(); + + return 1; +} + +int drm_ati_pcigart_cleanup(drm_device_t *dev, drm_ati_pcigart_info *gart_info) +{ + if (dev->sg == NULL) { + DRM_ERROR( "no scatter/gather memory!\n" ); + return 0; + } + + drm_pci_free(dev, dev->sg->dmah); + + return 1; +} |