This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-powerpc / iommu.h

diff --git a/include/asm-powerpc/iommu.h b/include/asm-powerpc/iommu.h
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+/*
+ * 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
+#ifdef __KERNEL__
+
+#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 */
+
+/* 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, unsigned long mask,
+               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, unsigned long mask, 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, unsigned long mask,
+               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 /* __KERNEL__ */
+#endif /* _ASM_IOMMU_H */