/** * \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" # define ATI_PCIGART_PAGE_SIZE 4096 /**< PCI GART page size */ static void *drm_ati_alloc_pcigart_table(int order) { unsigned long address; struct page *page; int i; DRM_DEBUG("%s: alloc %d order\n", __FUNCTION__, order); address = __get_free_pages(GFP_KERNEL | __GFP_COMP, order); if (address == 0UL) { return NULL; } page = virt_to_page(address); for (i = 0; i < order; i++, page++) SetPageReserved(page); DRM_DEBUG("%s: returning 0x%08lx\n", __FUNCTION__, address); return (void *)address; } static void drm_ati_free_pcigart_table(void *address, int order) { struct page *page; int i; int num_pages = 1 << order; DRM_DEBUG("%s\n", __FUNCTION__); page = virt_to_page((unsigned long)address); for (i = 0; i < num_pages; i++, page++) ClearPageReserved(page); free_pages((unsigned long)address, order); } int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info) { struct drm_sg_mem *entry = dev->sg; unsigned long pages; int i; int order; int num_pages, max_pages; /* we need to support large memory configurations */ if (!entry) { DRM_ERROR("no scatter/gather memory!\n"); return 0; } order = drm_order((gart_info->table_size + (PAGE_SIZE-1)) / PAGE_SIZE); num_pages = 1 << order; if (gart_info->bus_addr) { if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) { pci_unmap_single(dev->pdev, gart_info->bus_addr, num_pages * PAGE_SIZE, PCI_DMA_TODEVICE); } max_pages = (gart_info->table_size / sizeof(u32)); pages = (entry->pages <= max_pages) ? entry->pages : max_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, order); gart_info->addr = NULL; } return 1; } EXPORT_SYMBOL(drm_ati_pcigart_cleanup); int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info) { struct drm_sg_mem *entry = dev->sg; void *address = NULL; unsigned long pages; u32 *pci_gart, page_base, bus_address = 0; int i, j, ret = 0; int order; int max_pages; int num_pages; 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"); order = drm_order((gart_info->table_size + (PAGE_SIZE-1)) / PAGE_SIZE); num_pages = 1 << order; address = drm_ati_alloc_pcigart_table(order); 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, num_pages * PAGE_SIZE, PCI_DMA_TODEVICE); if (bus_address == 0) { DRM_ERROR("unable to map PCIGART pages!\n"); order = drm_order((gart_info->table_size + (PAGE_SIZE-1)) / PAGE_SIZE); drm_ati_free_pcigart_table(address, order); address = NULL; 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; max_pages = (gart_info->table_size / sizeof(u32)); pages = (entry->pages <= max_pages) ? entry->pages : max_pages; memset(pci_gart, 0, max_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++) { switch(gart_info->gart_reg_if) { case DRM_ATI_GART_IGP: *pci_gart = cpu_to_le32((page_base) | 0xc); break; case DRM_ATI_GART_PCIE: *pci_gart = cpu_to_le32((page_base >> 8) | 0xc); break; default: case DRM_ATI_GART_PCI: *pci_gart = cpu_to_le32(page_base); break; } 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);