/** * \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 <linux/export.h> #include <drm/drmP.h> #include <drm/ati_pcigart.h> # define ATI_PCIGART_PAGE_SIZE 4096 /**< PCI GART page size */ static int drm_ati_alloc_pcigart_table(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info) { gart_info->table_handle = drm_pci_alloc(dev, gart_info->table_size, PAGE_SIZE); if (gart_info->table_handle == NULL) return -ENOMEM; return 0; } static void drm_ati_free_pcigart_table(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info) { drm_pci_free(dev, gart_info->table_handle); gart_info->table_handle = NULL; } 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 max_pages; /* we need to support large memory configurations */ if (!entry) { DRM_ERROR("no scatter/gather memory!\n"); return 0; } if (gart_info->bus_addr) { 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_page(dev->pdev, entry->busaddr[i], PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); } 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->table_handle) { drm_ati_free_pcigart_table(dev, gart_info); } 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_local_map *map = &gart_info->mapping; struct drm_sg_mem *entry = dev->sg; void *address = NULL; unsigned long pages; u32 *pci_gart = NULL, page_base, gart_idx; dma_addr_t bus_address = 0; int i, j, ret = 0; int max_ati_pages, max_real_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"); if (pci_set_dma_mask(dev->pdev, gart_info->table_mask)) { DRM_ERROR("fail to set dma mask to 0x%Lx\n", (unsigned long long)gart_info->table_mask); ret = 1; goto done; } ret = drm_ati_alloc_pcigart_table(dev, gart_info); if (ret) { DRM_ERROR("cannot allocate PCI GART page!\n"); goto done; } pci_gart = gart_info->table_handle->vaddr; address = gart_info->table_handle->vaddr; bus_address = gart_info->table_handle->busaddr; } else { address = gart_info->addr; bus_address = gart_info->bus_addr; DRM_DEBUG("PCI: Gart Table: VRAM %08LX mapped at %08lX\n", (unsigned long long)bus_address, (unsigned long)address); } max_ati_pages = (gart_info->table_size / sizeof(u32)); max_real_pages = max_ati_pages / (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); pages = (entry->pages <= max_real_pages) ? entry->pages : max_real_pages; if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) { memset(pci_gart, 0, max_ati_pages * sizeof(u32)); } else { memset_io((void __iomem *)map->handle, 0, max_ati_pages * sizeof(u32)); } gart_idx = 0; for (i = 0; i < pages; i++) { /* we need to support large memory configurations */ entry->busaddr[i] = pci_map_page(dev->pdev, entry->pagelist[i], 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); if (pci_dma_mapping_error(dev->pdev, entry->busaddr[i])) { 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++) { u32 val; switch(gart_info->gart_reg_if) { case DRM_ATI_GART_IGP: val = page_base | 0xc; break; case DRM_ATI_GART_PCIE: val = (page_base >> 8) | 0xc; break; default: case DRM_ATI_GART_PCI: val = page_base; break; } if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) pci_gart[gart_idx] = cpu_to_le32(val); else DRM_WRITE32(map, gart_idx * sizeof(u32), val); gart_idx++; 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);