Merge branch 'mymerge' of ssh://ozlabs.org/home/sfr/kernel-sfr

3 files changed, 110 insertions, 181 deletions

diff --git a/include/asm-ppc/dma-mapping.h b/include/asm-powerpc/dma-mapping.h
index 6e96351..59a8016 100644
--- a/include/asm-ppc/dma-mapping.h
+++ b/include/asm-powerpc/dma-mapping.h
@@ -1,15 +1,22 @@
 /*
- * This is based on both include/asm-sh/dma-mapping.h and
- * include/asm-ppc/pci.h
+ * Copyright (C) 2004 IBM
+ *
+ * Implements the generic device dma API for powerpc.
+ * the pci and vio busses
  */
-#ifndef __ASM_PPC_DMA_MAPPING_H
-#define __ASM_PPC_DMA_MAPPING_H
+#ifndef _ASM_DMA_MAPPING_H
+#define _ASM_DMA_MAPPING_H
 
 #include <linux/config.h>
+#include <linux/types.h>
+#include <linux/cache.h>
 /* need struct page definitions */
 #include <linux/mm.h>
 #include <asm/scatterlist.h>
 #include <asm/io.h>
+#include <asm/bug.h>
+
+#define DMA_ERROR_CODE		(~(dma_addr_t)0x0)
 
 #ifdef CONFIG_NOT_COHERENT_CACHE
 /*
@@ -24,22 +31,12 @@ extern void __dma_free_coherent(size_t size, void *vaddr);
 extern void __dma_sync(void *vaddr, size_t size, int direction);
 extern void __dma_sync_page(struct page *page, unsigned long offset,
 				 size_t size, int direction);
-#define dma_cache_inv(_start,_size) \
-	invalidate_dcache_range(_start, (_start + _size))
-#define dma_cache_wback(_start,_size) \
-	clean_dcache_range(_start, (_start + _size))
-#define dma_cache_wback_inv(_start,_size) \
-	flush_dcache_range(_start, (_start + _size))
 
 #else /* ! CONFIG_NOT_COHERENT_CACHE */
 /*
  * Cache coherent cores.
  */
 
-#define dma_cache_inv(_start,_size)		do { } while (0)
-#define dma_cache_wback(_start,_size)		do { } while (0)
-#define dma_cache_wback_inv(_start,_size)	do { } while (0)
-
 #define __dma_alloc_coherent(gfp, size, handle)	NULL
 #define __dma_free_coherent(size, addr)		do { } while (0)
 #define __dma_sync(addr, size, rw)		do { } while (0)
@@ -47,6 +44,30 @@ extern void __dma_sync_page(struct page *page, unsigned long offset,
 
 #endif /* ! CONFIG_NOT_COHERENT_CACHE */
 
+#ifdef CONFIG_PPC64
+
+extern int dma_supported(struct device *dev, u64 mask);
+extern int dma_set_mask(struct device *dev, u64 dma_mask);
+extern void *dma_alloc_coherent(struct device *dev, size_t size,
+		dma_addr_t *dma_handle, gfp_t flag);
+extern void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
+		dma_addr_t dma_handle);
+extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
+		size_t size, enum dma_data_direction direction);
+extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
+		size_t size, enum dma_data_direction direction);
+extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
+		unsigned long offset, size_t size,
+		enum dma_data_direction direction);
+extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
+		size_t size, enum dma_data_direction direction);
+extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+		enum dma_data_direction direction);
+extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+		int nhwentries, enum dma_data_direction direction);
+
+#else /* CONFIG_PPC64 */
+
 #define dma_supported(dev, mask)	(1)
 
 static inline int dma_set_mask(struct device *dev, u64 dma_mask)
@@ -144,29 +165,27 @@ dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 /* We don't do anything here. */
 #define dma_unmap_sg(dev, sg, nents, dir)	do { } while (0)
 
-static inline void
-dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
-			size_t size,
-			enum dma_data_direction direction)
+#endif /* CONFIG_PPC64 */
+
+static inline void dma_sync_single_for_cpu(struct device *dev,
+		dma_addr_t dma_handle, size_t size,
+		enum dma_data_direction direction)
 {
 	BUG_ON(direction == DMA_NONE);
-
 	__dma_sync(bus_to_virt(dma_handle), size, direction);
 }
 
-static inline void
-dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
-			size_t size,
-			enum dma_data_direction direction)
+static inline void dma_sync_single_for_device(struct device *dev,
+		dma_addr_t dma_handle, size_t size,
+		enum dma_data_direction direction)
 {
 	BUG_ON(direction == DMA_NONE);
-
 	__dma_sync(bus_to_virt(dma_handle), size, direction);
 }
 
-static inline void
-dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
-		    enum dma_data_direction direction)
+static inline void dma_sync_sg_for_cpu(struct device *dev,
+		struct scatterlist *sg, int nents,
+		enum dma_data_direction direction)
 {
 	int i;
 
@@ -176,9 +195,9 @@ dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
 		__dma_sync_page(sg->page, sg->offset, sg->length, direction);
 }
 
-static inline void
-dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
-		    enum dma_data_direction direction)
+static inline void dma_sync_sg_for_device(struct device *dev,
+		struct scatterlist *sg, int nents,
+		enum dma_data_direction direction)
 {
 	int i;
 
@@ -188,6 +207,15 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
 		__dma_sync_page(sg->page, sg->offset, sg->length, direction);
 }
 
+static inline int dma_mapping_error(dma_addr_t dma_addr)
+{
+#ifdef CONFIG_PPC64
+	return (dma_addr == DMA_ERROR_CODE);
+#else
+	return 0;
+#endif
+}
+
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 #ifdef CONFIG_NOT_COHERENT_CACHE
@@ -198,40 +226,60 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
 
 static inline int dma_get_cache_alignment(void)
 {
+#ifdef CONFIG_PPC64
+	/* no easy way to get cache size on all processors, so return
+	 * the maximum possible, to be safe */
+	return (1 << L1_CACHE_SHIFT_MAX);
+#else
 	/*
 	 * Each processor family will define its own L1_CACHE_SHIFT,
 	 * L1_CACHE_BYTES wraps to this, so this is always safe.
 	 */
 	return L1_CACHE_BYTES;
+#endif
 }
 
-static inline void
-dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
-		      	      unsigned long offset, size_t size,
-		      	      enum dma_data_direction direction)
+static inline void dma_sync_single_range_for_cpu(struct device *dev,
+		dma_addr_t dma_handle, unsigned long offset, size_t size,
+		enum dma_data_direction direction)
 {
 	/* just sync everything for now */
 	dma_sync_single_for_cpu(dev, dma_handle, offset + size, direction);
 }
 
-static inline void
-dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
-		    		 unsigned long offset, size_t size,
-				 enum dma_data_direction direction)
+static inline void dma_sync_single_range_for_device(struct device *dev,
+		dma_addr_t dma_handle, unsigned long offset, size_t size,
+		enum dma_data_direction direction)
 {
 	/* just sync everything for now */
 	dma_sync_single_for_device(dev, dma_handle, offset + size, direction);
 }
 
 static inline void dma_cache_sync(void *vaddr, size_t size,
-				  enum dma_data_direction direction)
+		enum dma_data_direction direction)
 {
+	BUG_ON(direction == DMA_NONE);
 	__dma_sync(vaddr, size, (int)direction);
 }
 
-static inline int dma_mapping_error(dma_addr_t dma_addr)
-{
-	return 0;
-}
-
-#endif				/* __ASM_PPC_DMA_MAPPING_H */
+/*
+ * DMA operations are abstracted for G5 vs. i/pSeries, PCI vs. VIO
+ */
+struct dma_mapping_ops {
+	void *		(*alloc_coherent)(struct device *dev, size_t size,
+				dma_addr_t *dma_handle, gfp_t flag);
+	void		(*free_coherent)(struct device *dev, size_t size,
+				void *vaddr, dma_addr_t dma_handle);
+	dma_addr_t	(*map_single)(struct device *dev, void *ptr,
+				size_t size, enum dma_data_direction direction);
+	void		(*unmap_single)(struct device *dev, dma_addr_t dma_addr,
+				size_t size, enum dma_data_direction direction);
+	int		(*map_sg)(struct device *dev, struct scatterlist *sg,
+				int nents, enum dma_data_direction direction);
+	void		(*unmap_sg)(struct device *dev, struct scatterlist *sg,
+				int nents, enum dma_data_direction direction);
+	int		(*dma_supported)(struct device *dev, u64 mask);
+	int		(*dac_dma_supported)(struct device *dev, u64 mask);
+};
+
+#endif	/* _ASM_DMA_MAPPING_H */
diff --git a/include/asm-ppc/io.h b/include/asm-ppc/io.h
index 2bfdf9c..84ac6e2 100644
--- a/include/asm-ppc/io.h
+++ b/include/asm-ppc/io.h
@@ -545,6 +545,23 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
 #include <asm/mpc8260_pci9.h>
 #endif
 
+#ifdef CONFIG_NOT_COHERENT_CACHE
+
+#define dma_cache_inv(_start,_size) \
+	invalidate_dcache_range(_start, (_start + _size))
+#define dma_cache_wback(_start,_size) \
+	clean_dcache_range(_start, (_start + _size))
+#define dma_cache_wback_inv(_start,_size) \
+	flush_dcache_range(_start, (_start + _size))
+
+#else
+
+#define dma_cache_inv(_start,_size)		do { } while (0)
+#define dma_cache_wback(_start,_size)		do { } while (0)
+#define dma_cache_wback_inv(_start,_size)	do { } while (0)
+
+#endif
+
 /*
  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
  * access
diff --git a/include/asm-ppc64/dma-mapping.h b/include/asm-ppc64/dma-mapping.h
deleted file mode 100644
index fb68fa2..0000000
--- a/include/asm-ppc64/dma-mapping.h
+++ /dev/null
@@ -1,136 +0,0 @@
-/* Copyright (C) 2004 IBM
- *
- * Implements the generic device dma API for ppc64. Handles
- * the pci and vio busses
- */
-
-#ifndef _ASM_DMA_MAPPING_H
-#define _ASM_DMA_MAPPING_H
-
-#include <linux/types.h>
-#include <linux/cache.h>
-/* need struct page definitions */
-#include <linux/mm.h>
-#include <asm/scatterlist.h>
-#include <asm/bug.h>
-
-#define DMA_ERROR_CODE		(~(dma_addr_t)0x0)
-
-extern int dma_supported(struct device *dev, u64 mask);
-extern int dma_set_mask(struct device *dev, u64 dma_mask);
-extern void *dma_alloc_coherent(struct device *dev, size_t size,
-		dma_addr_t *dma_handle, gfp_t flag);
-extern void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
-		dma_addr_t dma_handle);
-extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
-		size_t size, enum dma_data_direction direction);
-extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
-		size_t size, enum dma_data_direction direction);
-extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
-		unsigned long offset, size_t size,
-		enum dma_data_direction direction);
-extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
-		size_t size, enum dma_data_direction direction);
-extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
-		enum dma_data_direction direction);
-extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
-		int nhwentries, enum dma_data_direction direction);
-
-static inline void
-dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
-			enum dma_data_direction direction)
-{
-	BUG_ON(direction == DMA_NONE);
-	/* nothing to do */
-}
-
-static inline void
-dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
-			   enum dma_data_direction direction)
-{
-	BUG_ON(direction == DMA_NONE);
-	/* nothing to do */
-}
-
-static inline void
-dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
-		    enum dma_data_direction direction)
-{
-	BUG_ON(direction == DMA_NONE);
-	/* nothing to do */
-}
-
-static inline void
-dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
-		       enum dma_data_direction direction)
-{
-	BUG_ON(direction == DMA_NONE);
-	/* nothing to do */
-}
-
-static inline int dma_mapping_error(dma_addr_t dma_addr)
-{
-	return (dma_addr == DMA_ERROR_CODE);
-}
-
-/* Now for the API extensions over the pci_ one */
-
-#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
-#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(d)	(1)
-
-static inline int
-dma_get_cache_alignment(void)
-{
-	/* no easy way to get cache size on all processors, so return
-	 * the maximum possible, to be safe */
-	return (1 << L1_CACHE_SHIFT_MAX);
-}
-
-static inline void
-dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
-			      unsigned long offset, size_t size,
-			      enum dma_data_direction direction)
-{
-	BUG_ON(direction == DMA_NONE);
-	/* nothing to do */
-}
-
-static inline void
-dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
-				 unsigned long offset, size_t size,
-				 enum dma_data_direction direction)
-{
-	BUG_ON(direction == DMA_NONE);
-	/* nothing to do */
-}
-
-static inline void
-dma_cache_sync(void *vaddr, size_t size,
-	       enum dma_data_direction direction)
-{
-	BUG_ON(direction == DMA_NONE);
-	/* nothing to do */
-}
-
-/*
- * DMA operations are abstracted for G5 vs. i/pSeries, PCI vs. VIO
- */
-struct dma_mapping_ops {
-	void *		(*alloc_coherent)(struct device *dev, size_t size,
-				dma_addr_t *dma_handle, gfp_t flag);
-	void		(*free_coherent)(struct device *dev, size_t size,
-				void *vaddr, dma_addr_t dma_handle);
-	dma_addr_t	(*map_single)(struct device *dev, void *ptr,
-				size_t size, enum dma_data_direction direction);
-	void		(*unmap_single)(struct device *dev, dma_addr_t dma_addr,
-				size_t size, enum dma_data_direction direction);
-	int		(*map_sg)(struct device *dev, struct scatterlist *sg,
-				int nents, enum dma_data_direction direction);
-	void		(*unmap_sg)(struct device *dev, struct scatterlist *sg,
-				int nents, enum dma_data_direction direction);
-	int		(*dma_supported)(struct device *dev, u64 mask);
-	int		(*dac_dma_supported)(struct device *dev, u64 mask);
-};
-
-#endif	/* _ASM_DMA_MAPPING_H */