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1 | /* |
2 | * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation | |
3 | * Rewrite, cleanup: | |
91f14480 | 4 | * Copyright (C) 2004 Olof Johansson <olof@lixom.net>, IBM Corporation |
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5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | #ifndef _ASM_IOMMU_H | |
22 | #define _ASM_IOMMU_H | |
23 | ||
426c1a11 | 24 | #include <linux/config.h> |
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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 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 | struct iommu_table { | |
38 | unsigned long it_busno; /* Bus number this table belongs to */ | |
39 | unsigned long it_size; /* Size of iommu table in entries */ | |
40 | unsigned long it_offset; /* Offset into global table */ | |
41 | unsigned long it_base; /* mapped address of tce table */ | |
42 | unsigned long it_index; /* which iommu table this is */ | |
43 | unsigned long it_type; /* type: PCI or Virtual Bus */ | |
44 | unsigned long it_blocksize; /* Entries in each block (cacheline) */ | |
45 | unsigned long it_hint; /* Hint for next alloc */ | |
46 | unsigned long it_largehint; /* Hint for large allocs */ | |
47 | unsigned long it_halfpoint; /* Breaking point for small/large allocs */ | |
48 | spinlock_t it_lock; /* Protects it_map */ | |
49 | unsigned long *it_map; /* A simple allocation bitmap for now */ | |
50 | }; | |
51 | ||
52 | struct scatterlist; | |
53 | struct device_node; | |
54 | ||
55 | #ifdef CONFIG_PPC_MULTIPLATFORM | |
56 | ||
57 | /* Walks all buses and creates iommu tables */ | |
58 | extern void iommu_setup_pSeries(void); | |
1beb6a7d | 59 | extern void iommu_setup_dart(void); |
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60 | |
61 | /* Frees table for an individual device node */ | |
62 | extern void iommu_free_table(struct device_node *dn); | |
63 | ||
64 | #endif /* CONFIG_PPC_MULTIPLATFORM */ | |
65 | ||
66 | #ifdef CONFIG_PPC_PSERIES | |
67 | ||
68 | /* Creates table for an individual device node */ | |
69 | extern void iommu_devnode_init_pSeries(struct device_node *dn); | |
70 | ||
71 | #endif /* CONFIG_PPC_PSERIES */ | |
72 | ||
73 | #ifdef CONFIG_PPC_ISERIES | |
74 | ||
75 | /* Creates table for an individual device node */ | |
76 | extern void iommu_devnode_init_iSeries(struct device_node *dn); | |
3c726f8d BH |
77 | /* Get table parameters from HV */ |
78 | extern void iommu_table_getparms_iSeries(unsigned long busno, | |
79 | unsigned char slotno, | |
80 | unsigned char virtbus, | |
81 | struct iommu_table* tbl); | |
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82 | |
83 | #endif /* CONFIG_PPC_ISERIES */ | |
84 | ||
85 | /* Initializes an iommu_table based in values set in the passed-in | |
86 | * structure | |
87 | */ | |
88 | extern struct iommu_table *iommu_init_table(struct iommu_table * tbl); | |
89 | ||
90 | extern int iommu_map_sg(struct device *dev, struct iommu_table *tbl, | |
91 | struct scatterlist *sglist, int nelems, | |
92 | enum dma_data_direction direction); | |
93 | extern void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist, | |
94 | int nelems, enum dma_data_direction direction); | |
95 | ||
96 | extern void *iommu_alloc_coherent(struct iommu_table *tbl, size_t size, | |
5629d41d | 97 | dma_addr_t *dma_handle, gfp_t flag); |
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98 | extern void iommu_free_coherent(struct iommu_table *tbl, size_t size, |
99 | void *vaddr, dma_addr_t dma_handle); | |
100 | extern dma_addr_t iommu_map_single(struct iommu_table *tbl, void *vaddr, | |
101 | size_t size, enum dma_data_direction direction); | |
102 | extern void iommu_unmap_single(struct iommu_table *tbl, dma_addr_t dma_handle, | |
103 | size_t size, enum dma_data_direction direction); | |
104 | ||
105 | extern void iommu_init_early_pSeries(void); | |
106 | extern void iommu_init_early_iSeries(void); | |
1beb6a7d | 107 | extern void iommu_init_early_dart(void); |
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108 | |
109 | #ifdef CONFIG_PCI | |
110 | extern void pci_iommu_init(void); | |
111 | extern void pci_direct_iommu_init(void); | |
112 | #else | |
113 | static inline void pci_iommu_init(void) { } | |
114 | #endif | |
115 | ||
1beb6a7d | 116 | extern void alloc_dart_table(void); |
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117 | |
118 | #endif /* _ASM_IOMMU_H */ |