346 lines
9.0 KiB
C
346 lines
9.0 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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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
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get_page(page);
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#endif
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SetPageReserved(page);
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}
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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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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
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__put_page(page);
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#endif
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ClearPageReserved(page);
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}
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free_pages((unsigned long)address, order);
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}
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int drm_ati_pcigart_cleanup(drm_device_t *dev, drm_ati_pcigart_info *gart_info)
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{
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drm_sg_mem_t *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(drm_device_t *dev, drm_ati_pcigart_info *gart_info)
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{
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drm_sg_mem_t *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 + (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 + (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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if (gart_info->is_pcie)
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*pci_gart = cpu_to_le32((page_base >> 8) | 0xc);
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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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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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static int ati_pcigart_needs_unbind_cache_adjust(drm_ttm_backend_t *backend)
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{
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return ((backend->flags & DRM_BE_FLAG_BOUND_CACHED) ? 0 : 1);
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}
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static int ati_pcigart_populate(drm_ttm_backend_t *backend,
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unsigned long num_pages,
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struct page **pages)
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{
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ati_pcigart_ttm_priv *atipci_priv = (ati_pcigart_ttm_priv *)backend->private;
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struct page **cur_page, **last_page = pages + num_pages;
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struct ati_pcigart_memory *mem;
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DRM_DEBUG("%d\n", num_pages);
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if (drm_alloc_memctl(num_pages * sizeof(void *)))
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return -1;
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mem = drm_alloc(sizeof(struct ati_pcigart_memory), DRM_MEM_MAPPINGS);
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if (!mem) {
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drm_free_memctl(num_pages * sizeof(void *));
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return -1;
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}
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mem->page_count = num_pages;
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atipci_priv->mem = mem;
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return 0;
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}
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static int ati_pcigart_bind_ttm(drm_ttm_backend_t *backend,
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unsigned long offset,
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int cached)
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{
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ati_pcigart_ttm_priv *atipci_priv = (ati_pcigart_ttm_priv *)backend->private;
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DRM_DEBUG("\n");
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return -1;
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}
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static int ati_pcigart_unbind_ttm(drm_ttm_backend_t *backend)
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{
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ati_pcigart_ttm_priv *atipci_priv = (ati_pcigart_ttm_priv *)backend->private;
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DRM_DEBUG("\n");
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return -1;
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}
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static void ati_pcigart_clear_ttm(drm_ttm_backend_t *backend)
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{
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ati_pcigart_ttm_priv *atipci_priv = (ati_pcigart_ttm_priv *)backend->private;
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struct ati_pcigart_memory *mem = atipci_priv->mem;
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DRM_DEBUG("\n");
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if (mem) {
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unsigned long num_pages = mem->page_count;
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backend->unbind(backend);
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/* free test */
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drm_free(mem, sizeof(struct ati_pcigart_memory), DRM_MEM_MAPPINGS);
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drm_free_memctl(num_pages * sizeof(void *));
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}
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atipci_priv->mem = NULL;
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}
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static void ati_pcigart_destroy_ttm(drm_ttm_backend_t *backend)
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{
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ati_pcigart_ttm_priv *atipci_priv;
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if (backend) {
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DRM_DEBUG("\n");
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atipci_priv = (ati_pcigart_ttm_priv *)backend->private;
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if (atipci_priv) {
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if (atipci_priv->mem) {
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backend->clear(backend);
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}
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drm_ctl_free(atipci_priv, sizeof(*atipci_priv), DRM_MEM_MAPPINGS);
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backend->private = NULL;
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}
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if (backend->flags & DRM_BE_FLAG_NEEDS_FREE) {
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drm_ctl_free(backend, sizeof(*backend), DRM_MEM_MAPPINGS);
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}
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}
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}
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drm_ttm_backend_t *ati_pcigart_init_ttm(struct drm_device *dev,
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drm_ttm_backend_t *backend)
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{
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drm_ttm_backend_t *atipci_be;
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ati_pcigart_ttm_priv *atipci_priv;
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atipci_be = (backend != NULL) ? backend :
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drm_ctl_calloc(1, sizeof (*atipci_be), DRM_MEM_MAPPINGS);
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if (!atipci_be)
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return NULL;
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atipci_priv = drm_ctl_calloc(1, sizeof(*atipci_priv), DRM_MEM_MAPPINGS);
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if (!atipci_priv) {
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drm_ctl_free(atipci_be, sizeof(*atipci_be), DRM_MEM_MAPPINGS);
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return NULL;
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}
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atipci_priv->populated = FALSE;
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atipci_be->needs_ub_cache_adjust = ati_pcigart_needs_unbind_cache_adjust;
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atipci_be->populate = ati_pcigart_populate;
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atipci_be->clear = ati_pcigart_clear_ttm;
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atipci_be->bind = ati_pcigart_bind_ttm;
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atipci_be->unbind = ati_pcigart_unbind_ttm;
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atipci_be->destroy = ati_pcigart_destroy_ttm;
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DRM_FLAG_MASKED(atipci_be->flags, (backend == NULL) ? DRM_BE_FLAG_NEEDS_FREE : 0, DRM_BE_FLAG_NEEDS_FREE);
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atipci_be->drm_map_type = _DRM_SCATTER_GATHER;
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return atipci_be;
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}
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EXPORT_SYMBOL(ati_pcigart_init_ttm);
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