| /* |
| * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation |
| * Rewrite, cleanup: |
| * Copyright (C) 2004 Olof Johansson <olof@lixom.net>, IBM Corporation |
| * |
| * 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 |
| */ |
| |
| #ifndef _ASM_IOMMU_H |
| #define _ASM_IOMMU_H |
| |
| #include <linux/config.h> |
| #include <asm/types.h> |
| #include <linux/spinlock.h> |
| #include <linux/device.h> |
| #include <linux/dma-mapping.h> |
| |
| /* |
| * IOMAP_MAX_ORDER defines the largest contiguous block |
| * of dma space we can get. IOMAP_MAX_ORDER = 13 |
| * allows up to 2**12 pages (4096 * 4096) = 16 MB |
| */ |
| #define IOMAP_MAX_ORDER 13 |
| |
| struct iommu_table { |
| unsigned long it_busno; /* Bus number this table belongs to */ |
| unsigned long it_size; /* Size of iommu table in entries */ |
| unsigned long it_offset; /* Offset into global table */ |
| unsigned long it_base; /* mapped address of tce table */ |
| unsigned long it_index; /* which iommu table this is */ |
| unsigned long it_type; /* type: PCI or Virtual Bus */ |
| unsigned long it_blocksize; /* Entries in each block (cacheline) */ |
| unsigned long it_hint; /* Hint for next alloc */ |
| unsigned long it_largehint; /* Hint for large allocs */ |
| unsigned long it_halfpoint; /* Breaking point for small/large allocs */ |
| spinlock_t it_lock; /* Protects it_map */ |
| unsigned long *it_map; /* A simple allocation bitmap for now */ |
| }; |
| |
| struct scatterlist; |
| struct device_node; |
| |
| #ifdef CONFIG_PPC_MULTIPLATFORM |
| |
| /* Walks all buses and creates iommu tables */ |
| extern void iommu_setup_pSeries(void); |
| extern void iommu_setup_dart(void); |
| |
| /* Frees table for an individual device node */ |
| extern void iommu_free_table(struct device_node *dn); |
| |
| #endif /* CONFIG_PPC_MULTIPLATFORM */ |
| |
| #ifdef CONFIG_PPC_PSERIES |
| |
| /* Creates table for an individual device node */ |
| extern void iommu_devnode_init_pSeries(struct device_node *dn); |
| |
| #endif /* CONFIG_PPC_PSERIES */ |
| |
| #ifdef CONFIG_PPC_ISERIES |
| |
| /* Creates table for an individual device node */ |
| extern void iommu_devnode_init_iSeries(struct device_node *dn); |
| /* Get table parameters from HV */ |
| extern void iommu_table_getparms_iSeries(unsigned long busno, |
| unsigned char slotno, |
| unsigned char virtbus, |
| struct iommu_table* tbl); |
| |
| #endif /* CONFIG_PPC_ISERIES */ |
| |
| /* Initializes an iommu_table based in values set in the passed-in |
| * structure |
| */ |
| extern struct iommu_table *iommu_init_table(struct iommu_table * tbl); |
| |
| extern int iommu_map_sg(struct device *dev, struct iommu_table *tbl, |
| struct scatterlist *sglist, int nelems, |
| enum dma_data_direction direction); |
| extern void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist, |
| int nelems, enum dma_data_direction direction); |
| |
| extern void *iommu_alloc_coherent(struct iommu_table *tbl, size_t size, |
| dma_addr_t *dma_handle, gfp_t flag); |
| extern void iommu_free_coherent(struct iommu_table *tbl, size_t size, |
| void *vaddr, dma_addr_t dma_handle); |
| extern dma_addr_t iommu_map_single(struct iommu_table *tbl, void *vaddr, |
| size_t size, enum dma_data_direction direction); |
| extern void iommu_unmap_single(struct iommu_table *tbl, dma_addr_t dma_handle, |
| size_t size, enum dma_data_direction direction); |
| |
| extern void iommu_init_early_pSeries(void); |
| extern void iommu_init_early_iSeries(void); |
| extern void iommu_init_early_dart(void); |
| |
| #ifdef CONFIG_PCI |
| extern void pci_iommu_init(void); |
| extern void pci_direct_iommu_init(void); |
| #else |
| static inline void pci_iommu_init(void) { } |
| #endif |
| |
| extern void alloc_dart_table(void); |
| |
| #endif /* _ASM_IOMMU_H */ |