103 lines
3.0 KiB
C
103 lines
3.0 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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/*-
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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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*/
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#include "drmP.h"
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#define ATI_PCIGART_PAGE_SIZE 4096 /* PCI GART page size */
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#define ATI_MAX_PCIGART_PAGES 8192 /* 32 MB aperture, 4K pages */
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#define ATI_PCIGART_TABLE_SIZE 32768
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int drm_ati_pcigart_init(drm_device_t *dev, unsigned long *addr,
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dma_addr_t *bus_addr, int is_pcie)
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{
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unsigned long pages;
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u32 *pci_gart = 0, page_base;
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int i, j;
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*addr = 0;
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*bus_addr = 0;
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if (dev->sg == NULL) {
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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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dev->sg->dmah = drm_pci_alloc(dev, ATI_PCIGART_TABLE_SIZE, 0,
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0xfffffffful);
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if (dev->sg->dmah == NULL) {
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DRM_ERROR("cannot allocate PCI GART table!\n");
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return 0;
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}
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*addr = (long)dev->sg->dmah->vaddr;
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*bus_addr = dev->sg->dmah->busaddr;
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pci_gart = (u32 *)dev->sg->dmah->vaddr;
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pages = DRM_MIN(dev->sg->pages, ATI_MAX_PCIGART_PAGES);
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bzero(pci_gart, ATI_PCIGART_TABLE_SIZE);
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KASSERT(PAGE_SIZE >= ATI_PCIGART_PAGE_SIZE, "page size too small");
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for ( i = 0 ; i < pages ; i++ ) {
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page_base = (u32) dev->sg->busaddr[i];
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for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
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if (is_pcie) {
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*pci_gart = (cpu_to_le32(page_base)>>8) | 0xc;
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DRM_DEBUG("PCIE: %d %08X %08X to %p\n", i,
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page_base, (cpu_to_le32(page_base)>>8)|0xc,
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pci_gart);
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} else
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*pci_gart = cpu_to_le32(page_base);
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pci_gart++;
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page_base += ATI_PCIGART_PAGE_SIZE;
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}
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}
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DRM_MEMORYBARRIER();
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return 1;
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}
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int drm_ati_pcigart_cleanup(drm_device_t *dev, unsigned long addr,
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dma_addr_t bus_addr)
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{
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if (dev->sg == NULL) {
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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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drm_pci_free(dev, dev->sg->dmah);
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return 1;
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}
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