Merge branch 'for-linus' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping

Pull DMA mapping branch from Marek Szyprowski:
 "Short summary for the whole series:

  A few limitations have been identified in the current dma-mapping
  design and its implementations for various architectures.  There exist
  more than one function for allocating and freeing the buffers:
  currently these 3 are used dma_{alloc, free}_coherent,
  dma_{alloc,free}_writecombine, dma_{alloc,free}_noncoherent.

  For most of the systems these calls are almost equivalent and can be
  interchanged.  For others, especially the truly non-coherent ones
  (like ARM), the difference can be easily noticed in overall driver
  performance.  Sadly not all architectures provide implementations for
  all of them, so the drivers might need to be adapted and cannot be
  easily shared between different architectures.  The provided patches
  unify all these functions and hide the differences under the already
  existing dma attributes concept.  The thread with more references is
  available here:

    http://www.spinics.net/lists/linux-sh/msg09777.html

  These patches are also a prerequisite for unifying DMA-mapping
  implementation on ARM architecture with the common one provided by
  dma_map_ops structure and extending it with IOMMU support.  More
  information is available in the following thread:

    http://thread.gmane.org/gmane.linux.kernel.cross-arch/12819

  More works on dma-mapping framework are planned, especially in the
  area of buffer sharing and managing the shared mappings (together with
  the recently introduced dma_buf interface: commit d15bd7ee445d
  "dma-buf: Introduce dma buffer sharing mechanism").

  The patches in the current set introduce a new alloc/free methods
  (with support for memory attributes) in dma_map_ops structure, which
  will later replace dma_alloc_coherent and dma_alloc_writecombine
  functions."

People finally started piping up with support for merging this, so I'm
merging it as the last of the pending stuff from the merge window.
Looks like pohmelfs is going to wait for 3.5 and more external support
for merging.

* 'for-linus' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
  common: DMA-mapping: add NON-CONSISTENT attribute
  common: DMA-mapping: add WRITE_COMBINE attribute
  common: dma-mapping: introduce mmap method
  common: dma-mapping: remove old alloc_coherent and free_coherent methods
  Hexagon: adapt for dma_map_ops changes
  Unicore32: adapt for dma_map_ops changes
  Microblaze: adapt for dma_map_ops changes
  SH: adapt for dma_map_ops changes
  Alpha: adapt for dma_map_ops changes
  SPARC: adapt for dma_map_ops changes
  PowerPC: adapt for dma_map_ops changes
  MIPS: adapt for dma_map_ops changes
  X86 & IA64: adapt for dma_map_ops changes
  common: dma-mapping: introduce generic alloc() and free() methods

4 files changed, 33 insertions, 22 deletions

diff --git a/arch/sparc/include/asm/dma-mapping.h b/arch/sparc/include/asm/dma-mapping.h
index 8c0e4f7..48a7c65 100644
--- a/arch/sparc/include/asm/dma-mapping.h
+++ b/arch/sparc/include/asm/dma-mapping.h
@@ -26,24 +26,30 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
 
 #include <asm-generic/dma-mapping-common.h>
 
-static inline void *dma_alloc_coherent(struct device *dev, size_t size,
-				       dma_addr_t *dma_handle, gfp_t flag)
+#define dma_alloc_coherent(d,s,h,f)	dma_alloc_attrs(d,s,h,f,NULL)
+
+static inline void *dma_alloc_attrs(struct device *dev, size_t size,
+				    dma_addr_t *dma_handle, gfp_t flag,
+				    struct dma_attrs *attrs)
 {
 	struct dma_map_ops *ops = get_dma_ops(dev);
 	void *cpu_addr;
 
-	cpu_addr = ops->alloc_coherent(dev, size, dma_handle, flag);
+	cpu_addr = ops->alloc(dev, size, dma_handle, flag, attrs);
 	debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
 	return cpu_addr;
 }
 
-static inline void dma_free_coherent(struct device *dev, size_t size,
-				     void *cpu_addr, dma_addr_t dma_handle)
+#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
+
+static inline void dma_free_attrs(struct device *dev, size_t size,
+				  void *cpu_addr, dma_addr_t dma_handle,
+				  struct dma_attrs *attrs)
 {
 	struct dma_map_ops *ops = get_dma_ops(dev);
 
 	debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
-	ops->free_coherent(dev, size, cpu_addr, dma_handle);
+	ops->free(dev, size, cpu_addr, dma_handle, attrs);
 }
 
 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
diff --git a/arch/sparc/kernel/iommu.c b/arch/sparc/kernel/iommu.c
index 4643d68..070ed14 100644
--- a/arch/sparc/kernel/iommu.c
+++ b/arch/sparc/kernel/iommu.c
@@ -280,7 +280,8 @@ static inline void iommu_free_ctx(struct iommu *iommu, int ctx)
 }
 
 static void *dma_4u_alloc_coherent(struct device *dev, size_t size,
-				   dma_addr_t *dma_addrp, gfp_t gfp)
+				   dma_addr_t *dma_addrp, gfp_t gfp,
+				   struct dma_attrs *attrs)
 {
 	unsigned long flags, order, first_page;
 	struct iommu *iommu;
@@ -330,7 +331,8 @@ static void *dma_4u_alloc_coherent(struct device *dev, size_t size,
 }
 
 static void dma_4u_free_coherent(struct device *dev, size_t size,
-				 void *cpu, dma_addr_t dvma)
+				 void *cpu, dma_addr_t dvma,
+				 struct dma_attrs *attrs)
 {
 	struct iommu *iommu;
 	unsigned long flags, order, npages;
@@ -825,8 +827,8 @@ static void dma_4u_sync_sg_for_cpu(struct device *dev,
 }
 
 static struct dma_map_ops sun4u_dma_ops = {
-	.alloc_coherent		= dma_4u_alloc_coherent,
-	.free_coherent		= dma_4u_free_coherent,
+	.alloc			= dma_4u_alloc_coherent,
+	.free			= dma_4u_free_coherent,
 	.map_page		= dma_4u_map_page,
 	.unmap_page		= dma_4u_unmap_page,
 	.map_sg			= dma_4u_map_sg,
diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index d0479e2..21bd739 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -261,7 +261,8 @@ EXPORT_SYMBOL(sbus_set_sbus64);
  * CPU may access them without any explicit flushing.
  */
 static void *sbus_alloc_coherent(struct device *dev, size_t len,
-				 dma_addr_t *dma_addrp, gfp_t gfp)
+				 dma_addr_t *dma_addrp, gfp_t gfp,
+				 struct dma_attrs *attrs)
 {
 	struct platform_device *op = to_platform_device(dev);
 	unsigned long len_total = PAGE_ALIGN(len);
@@ -315,7 +316,7 @@ err_nopages:
 }
 
 static void sbus_free_coherent(struct device *dev, size_t n, void *p,
-			       dma_addr_t ba)
+			       dma_addr_t ba, struct dma_attrs *attrs)
 {
 	struct resource *res;
 	struct page *pgv;
@@ -407,8 +408,8 @@ static void sbus_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
 }
 
 struct dma_map_ops sbus_dma_ops = {
-	.alloc_coherent		= sbus_alloc_coherent,
-	.free_coherent		= sbus_free_coherent,
+	.alloc			= sbus_alloc_coherent,
+	.free			= sbus_free_coherent,
 	.map_page		= sbus_map_page,
 	.unmap_page		= sbus_unmap_page,
 	.map_sg			= sbus_map_sg,
@@ -436,7 +437,8 @@ arch_initcall(sparc_register_ioport);
  * hwdev should be valid struct pci_dev pointer for PCI devices.
  */
 static void *pci32_alloc_coherent(struct device *dev, size_t len,
-				  dma_addr_t *pba, gfp_t gfp)
+				  dma_addr_t *pba, gfp_t gfp,
+				  struct dma_attrs *attrs)
 {
 	unsigned long len_total = PAGE_ALIGN(len);
 	void *va;
@@ -489,7 +491,7 @@ err_nopages:
  * past this call are illegal.
  */
 static void pci32_free_coherent(struct device *dev, size_t n, void *p,
-				dma_addr_t ba)
+				dma_addr_t ba, struct dma_attrs *attrs)
 {
 	struct resource *res;
 
@@ -645,8 +647,8 @@ static void pci32_sync_sg_for_device(struct device *device, struct scatterlist *
 }
 
 struct dma_map_ops pci32_dma_ops = {
-	.alloc_coherent		= pci32_alloc_coherent,
-	.free_coherent		= pci32_free_coherent,
+	.alloc			= pci32_alloc_coherent,
+	.free			= pci32_free_coherent,
 	.map_page		= pci32_map_page,
 	.unmap_page		= pci32_unmap_page,
 	.map_sg			= pci32_map_sg,
diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c
index af5755d..7661e84 100644
--- a/arch/sparc/kernel/pci_sun4v.c
+++ b/arch/sparc/kernel/pci_sun4v.c
@@ -128,7 +128,8 @@ static inline long iommu_batch_end(void)
 }
 
 static void *dma_4v_alloc_coherent(struct device *dev, size_t size,
-				   dma_addr_t *dma_addrp, gfp_t gfp)
+				   dma_addr_t *dma_addrp, gfp_t gfp,
+				   struct dma_attrs *attrs)
 {
 	unsigned long flags, order, first_page, npages, n;
 	struct iommu *iommu;
@@ -198,7 +199,7 @@ range_alloc_fail:
 }
 
 static void dma_4v_free_coherent(struct device *dev, size_t size, void *cpu,
-				 dma_addr_t dvma)
+				 dma_addr_t dvma, struct dma_attrs *attrs)
 {
 	struct pci_pbm_info *pbm;
 	struct iommu *iommu;
@@ -527,8 +528,8 @@ static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
 }
 
 static struct dma_map_ops sun4v_dma_ops = {
-	.alloc_coherent			= dma_4v_alloc_coherent,
-	.free_coherent			= dma_4v_free_coherent,
+	.alloc				= dma_4v_alloc_coherent,
+	.free				= dma_4v_free_coherent,
 	.map_page			= dma_4v_map_page,
 	.unmap_page			= dma_4v_unmap_page,
 	.map_sg				= dma_4v_map_sg,