diff options
Diffstat (limited to 'arch/powerpc/kernel/pci_iommu.c')
| -rw-r--r-- | arch/powerpc/kernel/pci_iommu.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/arch/powerpc/kernel/pci_iommu.c b/arch/powerpc/kernel/pci_iommu.c deleted file mode 100644 index 0688b2534ac..00000000000 --- a/arch/powerpc/kernel/pci_iommu.c +++ /dev/null @@ -1,164 +0,0 @@ -/* - * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation - * - * Rewrite, cleanup, new allocation schemes: - * Copyright (C) 2004 Olof Johansson, IBM Corporation - * - * Dynamic DMA mapping support, platform-independent parts. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - - -#include <linux/init.h> -#include <linux/types.h> -#include <linux/slab.h> -#include <linux/mm.h> -#include <linux/spinlock.h> -#include <linux/string.h> -#include <linux/pci.h> -#include <linux/dma-mapping.h> -#include <asm/io.h> -#include <asm/prom.h> -#include <asm/iommu.h> -#include <asm/pci-bridge.h> -#include <asm/machdep.h> -#include <asm/ppc-pci.h> - -/* - * We can use ->sysdata directly and avoid the extra work in - * pci_device_to_OF_node since ->sysdata will have been initialised - * in the iommu init code for all devices. - */ -#define PCI_GET_DN(dev) ((struct device_node *)((dev)->sysdata)) - -static inline struct iommu_table *device_to_table(struct device *hwdev) -{ - struct pci_dev *pdev; - - if (!hwdev) { - pdev = ppc64_isabridge_dev; - if (!pdev) - return NULL; - } else - pdev = to_pci_dev(hwdev); - - return PCI_DN(PCI_GET_DN(pdev))->iommu_table; -} - - -static inline unsigned long device_to_mask(struct device *hwdev) -{ - struct pci_dev *pdev; - - if (!hwdev) { - pdev = ppc64_isabridge_dev; - if (!pdev) /* This is the best guess we can do */ - return 0xfffffffful; - } else - pdev = to_pci_dev(hwdev); - - if (pdev->dma_mask) - return pdev->dma_mask; - - /* Assume devices without mask can take 32 bit addresses */ - return 0xfffffffful; -} - - -/* Allocates a contiguous real buffer and creates mappings over it. - * Returns the virtual address of the buffer and sets dma_handle - * to the dma address (mapping) of the first page. - */ -static void *pci_iommu_alloc_coherent(struct device *hwdev, size_t size, - dma_addr_t *dma_handle, gfp_t flag) -{ - return iommu_alloc_coherent(device_to_table(hwdev), size, dma_handle, - device_to_mask(hwdev), flag, - pcibus_to_node(to_pci_dev(hwdev)->bus)); -} - -static void pci_iommu_free_coherent(struct device *hwdev, size_t size, - void *vaddr, dma_addr_t dma_handle) -{ - iommu_free_coherent(device_to_table(hwdev), size, vaddr, dma_handle); -} - -/* Creates TCEs for a user provided buffer. The user buffer must be - * contiguous real kernel storage (not vmalloc). The address of the buffer - * passed here is the kernel (virtual) address of the buffer. The buffer - * need not be page aligned, the dma_addr_t returned will point to the same - * byte within the page as vaddr. - */ -static dma_addr_t pci_iommu_map_single(struct device *hwdev, void *vaddr, - size_t size, enum dma_data_direction direction) -{ - return iommu_map_single(device_to_table(hwdev), vaddr, size, - device_to_mask(hwdev), direction); -} - - -static void pci_iommu_unmap_single(struct device *hwdev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction direction) -{ - iommu_unmap_single(device_to_table(hwdev), dma_handle, size, direction); -} - - -static int pci_iommu_map_sg(struct device *pdev, struct scatterlist *sglist, - int nelems, enum dma_data_direction direction) -{ - return iommu_map_sg(pdev, device_to_table(pdev), sglist, - nelems, device_to_mask(pdev), direction); -} - -static void pci_iommu_unmap_sg(struct device *pdev, struct scatterlist *sglist, - int nelems, enum dma_data_direction direction) -{ - iommu_unmap_sg(device_to_table(pdev), sglist, nelems, direction); -} - -/* We support DMA to/from any memory page via the iommu */ -static int pci_iommu_dma_supported(struct device *dev, u64 mask) -{ - struct iommu_table *tbl = device_to_table(dev); - - if (!tbl || tbl->it_offset > mask) { - printk(KERN_INFO "Warning: IOMMU table offset too big for device mask\n"); - if (tbl) - printk(KERN_INFO "mask: 0x%08lx, table offset: 0x%08lx\n", - mask, tbl->it_offset); - else - printk(KERN_INFO "mask: 0x%08lx, table unavailable\n", - mask); - return 0; - } else - return 1; -} - -struct dma_mapping_ops pci_iommu_ops = { - .alloc_coherent = pci_iommu_alloc_coherent, - .free_coherent = pci_iommu_free_coherent, - .map_single = pci_iommu_map_single, - .unmap_single = pci_iommu_unmap_single, - .map_sg = pci_iommu_map_sg, - .unmap_sg = pci_iommu_unmap_sg, - .dma_supported = pci_iommu_dma_supported, -}; - -void pci_iommu_init(void) -{ - pci_dma_ops = pci_iommu_ops; -} |