[POWERPC] Use 4kB iommu pages even on 64kB-page systems

[pandora-kernel.git] / include / asm-powerpc / iommu.h

diff --git a/include/asm-powerpc/iommu.h b/include/asm-powerpc/iommu.h
index 18ca29e..39fad68 100644 (file)
--- a/include/asm-powerpc/iommu.h
+++ b/include/asm-powerpc/iommu.h
@@ -22,18 +22,35 @@
 #define _ASM_IOMMU_H
 #ifdef __KERNEL__
 
-#include <linux/config.h>
-#include <asm/types.h>
+#include <linux/compiler.h>
 #include <linux/spinlock.h>
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
+#include <asm/types.h>
+#include <asm/bitops.h>
+
+#define IOMMU_PAGE_SHIFT      12
+#define IOMMU_PAGE_SIZE       (ASM_CONST(1) << IOMMU_PAGE_SHIFT)
+#define IOMMU_PAGE_MASK       (~((1 << IOMMU_PAGE_SHIFT) - 1))
+#define IOMMU_PAGE_ALIGN(addr) _ALIGN_UP(addr, IOMMU_PAGE_SIZE)
+
+#ifndef __ASSEMBLY__
+
+/* Pure 2^n version of get_order */
+static __inline__ __attribute_const__ int get_iommu_order(unsigned long size)
+{
+       return __ilog2((size - 1) >> IOMMU_PAGE_SHIFT) + 1;
+}
+
+#endif   /* __ASSEMBLY__ */
+
 
 /*
  * 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
+#define IOMAP_MAX_ORDER                13
 
 struct iommu_table {
        unsigned long  it_busno;     /* Bus number this table belongs to */
@@ -67,7 +84,8 @@ extern void iommu_free_table(struct device_node *dn);
 /* 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 struct iommu_table *iommu_init_table(struct iommu_table * tbl,
+                                           int nid);
 
 extern int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
                struct scatterlist *sglist, int nelems, unsigned long mask,
@@ -76,7 +94,8 @@ 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);
+               dma_addr_t *dma_handle, unsigned long mask,
+               gfp_t flag, int node);
 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,