231 lines
6 KiB
C
231 lines
6 KiB
C
/**
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* \file ati_pcigart.c
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* ATI PCI GART support
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*
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* \author Gareth Hughes <gareth@valinux.com>
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*/
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/*
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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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#include "drmP.h"
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# define ATI_PCIGART_PAGE_SIZE 4096 /**< PCI GART page size */
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static void *drm_ati_alloc_pcigart_table(int order)
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{
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unsigned long address;
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struct page *page;
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int i;
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DRM_DEBUG("%s: alloc %d order\n", __FUNCTION__, order);
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address = __get_free_pages(GFP_KERNEL | __GFP_COMP,
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order);
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if (address == 0UL) {
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return NULL;
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}
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page = virt_to_page(address);
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for (i = 0; i < order; i++, page++)
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SetPageReserved(page);
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DRM_DEBUG("%s: returning 0x%08lx\n", __FUNCTION__, address);
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return (void *)address;
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}
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static void drm_ati_free_pcigart_table(void *address, int order)
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{
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struct page *page;
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int i;
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int num_pages = 1 << order;
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DRM_DEBUG("%s\n", __FUNCTION__);
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page = virt_to_page((unsigned long)address);
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for (i = 0; i < num_pages; i++, page++)
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ClearPageReserved(page);
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free_pages((unsigned long)address, order);
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}
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int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
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{
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struct drm_sg_mem *entry = dev->sg;
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unsigned long pages;
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int i;
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int order;
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int num_pages, max_pages;
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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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order = drm_order((gart_info->table_size + (PAGE_SIZE-1)) / PAGE_SIZE);
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num_pages = 1 << order;
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if (gart_info->bus_addr) {
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if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
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pci_unmap_single(dev->pdev, gart_info->bus_addr,
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num_pages * PAGE_SIZE,
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PCI_DMA_TODEVICE);
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}
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max_pages = (gart_info->table_size / sizeof(u32));
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pages = (entry->pages <= max_pages)
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? entry->pages : max_pages;
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for (i = 0; i < pages; i++) {
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if (!entry->busaddr[i])
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break;
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pci_unmap_single(dev->pdev, entry->busaddr[i],
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PAGE_SIZE, PCI_DMA_TODEVICE);
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}
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if (gart_info->gart_table_location == DRM_ATI_GART_MAIN)
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gart_info->bus_addr = 0;
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}
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if (gart_info->gart_table_location == DRM_ATI_GART_MAIN
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&& gart_info->addr) {
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drm_ati_free_pcigart_table(gart_info->addr, order);
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gart_info->addr = NULL;
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}
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return 1;
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}
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EXPORT_SYMBOL(drm_ati_pcigart_cleanup);
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int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
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{
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struct drm_sg_mem *entry = dev->sg;
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void *address = NULL;
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unsigned long pages;
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u32 *pci_gart, page_base, bus_address = 0;
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int i, j, ret = 0;
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int order;
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int max_pages;
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int num_pages;
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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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if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
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DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
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order = drm_order((gart_info->table_size +
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(PAGE_SIZE-1)) / PAGE_SIZE);
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num_pages = 1 << order;
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address = drm_ati_alloc_pcigart_table(order);
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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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if (!dev->pdev) {
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DRM_ERROR("PCI device unknown!\n");
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goto done;
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}
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bus_address = pci_map_single(dev->pdev, address,
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num_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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order = drm_order((gart_info->table_size +
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(PAGE_SIZE-1)) / PAGE_SIZE);
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drm_ati_free_pcigart_table(address, order);
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address = NULL;
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goto done;
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}
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} else {
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address = gart_info->addr;
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bus_address = gart_info->bus_addr;
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DRM_DEBUG("PCI: Gart Table: VRAM %08X mapped at %08lX\n",
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bus_address, (unsigned long)address);
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}
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pci_gart = (u32 *) address;
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max_pages = (gart_info->table_size / sizeof(u32));
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pages = (entry->pages <= max_pages)
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? entry->pages : max_pages;
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memset(pci_gart, 0, max_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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entry->busaddr[i] = pci_map_single(dev->pdev,
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page_address(entry->
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pagelist[i]),
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PAGE_SIZE, PCI_DMA_TODEVICE);
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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, gart_info);
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address = NULL;
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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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switch(gart_info->gart_reg_if) {
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case DRM_ATI_GART_IGP:
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*pci_gart = cpu_to_le32((page_base) | 0xc);
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break;
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case DRM_ATI_GART_PCIE:
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*pci_gart = cpu_to_le32((page_base >> 8) | 0xc);
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break;
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default:
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case DRM_ATI_GART_PCI:
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*pci_gart = cpu_to_le32(page_base);
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break;
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}
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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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ret = 1;
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#if defined(__i386__) || defined(__x86_64__)
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wbinvd();
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#else
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mb();
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#endif
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done:
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gart_info->addr = address;
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gart_info->bus_addr = bus_address;
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return ret;
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}
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EXPORT_SYMBOL(drm_ati_pcigart_init);
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