Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * iommu.h |
| 3 | * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation |
| 4 | * Rewrite, cleanup: |
| 5 | * Copyright (C) 2004 Olof Johansson <olof@austin.ibm.com>, IBM Corporation |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | #ifndef _ASM_IOMMU_H |
| 23 | #define _ASM_IOMMU_H |
| 24 | |
| 25 | #include <asm/types.h> |
| 26 | #include <linux/spinlock.h> |
| 27 | #include <linux/device.h> |
| 28 | #include <linux/dma-mapping.h> |
| 29 | |
| 30 | /* |
| 31 | * IOMAP_MAX_ORDER defines the largest contiguous block |
| 32 | * of dma (tce) space we can get. IOMAP_MAX_ORDER = 13 |
| 33 | * allows up to 2**12 pages (4096 * 4096) = 16 MB |
| 34 | */ |
| 35 | #define IOMAP_MAX_ORDER 13 |
| 36 | |
| 37 | /* |
| 38 | * Tces come in two formats, one for the virtual bus and a different |
| 39 | * format for PCI |
| 40 | */ |
| 41 | #define TCE_VB 0 |
| 42 | #define TCE_PCI 1 |
| 43 | |
| 44 | /* tce_entry |
| 45 | * Used by pSeries (SMP) and iSeries/pSeries LPAR, but there it's |
| 46 | * abstracted so layout is irrelevant. |
| 47 | */ |
| 48 | union tce_entry { |
| 49 | unsigned long te_word; |
| 50 | struct { |
| 51 | unsigned int tb_cacheBits :6; /* Cache hash bits - not used */ |
| 52 | unsigned int tb_rsvd :6; |
| 53 | unsigned long tb_rpn :40; /* Real page number */ |
| 54 | unsigned int tb_valid :1; /* Tce is valid (vb only) */ |
| 55 | unsigned int tb_allio :1; /* Tce is valid for all lps (vb only) */ |
| 56 | unsigned int tb_lpindex :8; /* LpIndex for user of TCE (vb only) */ |
| 57 | unsigned int tb_pciwr :1; /* Write allowed (pci only) */ |
| 58 | unsigned int tb_rdwr :1; /* Read allowed (pci), Write allowed (vb) */ |
| 59 | } te_bits; |
| 60 | #define te_cacheBits te_bits.tb_cacheBits |
| 61 | #define te_rpn te_bits.tb_rpn |
| 62 | #define te_valid te_bits.tb_valid |
| 63 | #define te_allio te_bits.tb_allio |
| 64 | #define te_lpindex te_bits.tb_lpindex |
| 65 | #define te_pciwr te_bits.tb_pciwr |
| 66 | #define te_rdwr te_bits.tb_rdwr |
| 67 | }; |
| 68 | |
| 69 | |
| 70 | struct iommu_table { |
| 71 | unsigned long it_busno; /* Bus number this table belongs to */ |
| 72 | unsigned long it_size; /* Size of iommu table in entries */ |
| 73 | unsigned long it_offset; /* Offset into global table */ |
| 74 | unsigned long it_base; /* mapped address of tce table */ |
| 75 | unsigned long it_index; /* which iommu table this is */ |
| 76 | unsigned long it_type; /* type: PCI or Virtual Bus */ |
| 77 | unsigned long it_blocksize; /* Entries in each block (cacheline) */ |
| 78 | unsigned long it_hint; /* Hint for next alloc */ |
| 79 | unsigned long it_largehint; /* Hint for large allocs */ |
| 80 | unsigned long it_halfpoint; /* Breaking point for small/large allocs */ |
| 81 | spinlock_t it_lock; /* Protects it_map */ |
| 82 | unsigned long *it_map; /* A simple allocation bitmap for now */ |
| 83 | }; |
| 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | struct scatterlist; |
| 86 | |
| 87 | #ifdef CONFIG_PPC_MULTIPLATFORM |
| 88 | |
| 89 | /* Walks all buses and creates iommu tables */ |
| 90 | extern void iommu_setup_pSeries(void); |
| 91 | extern void iommu_setup_u3(void); |
| 92 | |
| 93 | /* Frees table for an individual device node */ |
| 94 | extern void iommu_free_table(struct device_node *dn); |
| 95 | |
| 96 | #endif /* CONFIG_PPC_MULTIPLATFORM */ |
| 97 | |
| 98 | #ifdef CONFIG_PPC_PSERIES |
| 99 | |
| 100 | /* Creates table for an individual device node */ |
| 101 | extern void iommu_devnode_init_pSeries(struct device_node *dn); |
| 102 | |
| 103 | #endif /* CONFIG_PPC_PSERIES */ |
| 104 | |
| 105 | #ifdef CONFIG_PPC_ISERIES |
| 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | /* Initializes tables for bio buses */ |
| 108 | extern void __init iommu_vio_init(void); |
| 109 | |
| 110 | struct iSeries_Device_Node; |
| 111 | /* Creates table for an individual device node */ |
| 112 | extern void iommu_devnode_init_iSeries(struct iSeries_Device_Node *dn); |
| 113 | |
| 114 | #endif /* CONFIG_PPC_ISERIES */ |
| 115 | |
| 116 | /* Initializes an iommu_table based in values set in the passed-in |
| 117 | * structure |
| 118 | */ |
| 119 | extern struct iommu_table *iommu_init_table(struct iommu_table * tbl); |
| 120 | |
| 121 | extern int iommu_map_sg(struct device *dev, struct iommu_table *tbl, |
| 122 | struct scatterlist *sglist, int nelems, |
| 123 | enum dma_data_direction direction); |
| 124 | extern void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist, |
| 125 | int nelems, enum dma_data_direction direction); |
| 126 | |
| 127 | extern void *iommu_alloc_coherent(struct iommu_table *tbl, size_t size, |
| 128 | dma_addr_t *dma_handle, unsigned int __nocast flag); |
| 129 | extern void iommu_free_coherent(struct iommu_table *tbl, size_t size, |
| 130 | void *vaddr, dma_addr_t dma_handle); |
| 131 | extern dma_addr_t iommu_map_single(struct iommu_table *tbl, void *vaddr, |
| 132 | size_t size, enum dma_data_direction direction); |
| 133 | extern void iommu_unmap_single(struct iommu_table *tbl, dma_addr_t dma_handle, |
| 134 | size_t size, enum dma_data_direction direction); |
| 135 | |
| 136 | extern void iommu_init_early_pSeries(void); |
| 137 | extern void iommu_init_early_iSeries(void); |
| 138 | extern void iommu_init_early_u3(void); |
| 139 | |
Stephen Rothwell | 145d01e | 2005-06-21 17:15:52 -0700 | [diff] [blame^] | 140 | #ifdef CONFIG_PCI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | extern void pci_iommu_init(void); |
| 142 | extern void pci_direct_iommu_init(void); |
Stephen Rothwell | 145d01e | 2005-06-21 17:15:52 -0700 | [diff] [blame^] | 143 | #else |
| 144 | static inline void pci_iommu_init(void) { } |
| 145 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | extern void alloc_u3_dart_table(void); |
| 148 | |
| 149 | #endif /* _ASM_IOMMU_H */ |