powerpc/dma: implement new dma_*map*_attrs() interfaces

Update powerpc to use the new dma_*map*_attrs() interfaces. In doing so
update struct dma_mapping_ops to accept a struct dma_attrs and propagate
these changes through to all users of the code (generic IOMMU and the
64bit DMA code, and the iseries and ps3 platform code).

The old dma_*map_*() interfaces are reimplemented as calls to the
corresponding new interfaces.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 files changed, 144 insertions, 63 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index f2a0f50146e1..462c86a4eefb 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -110,6 +110,7 @@ config PPC
         select HAVE_KPROBES
         select HAVE_KRETPROBES
         select HAVE_LMB
+        select HAVE_DMA_ATTRS
 
 config EARLY_PRINTK
         bool
diff --git a/arch/powerpc/kernel/dma_64.c b/arch/powerpc/kernel/dma_64.c
index 739744508c6e..3ae0c35d21f9 100644
--- a/arch/powerpc/kernel/dma_64.c
+++ b/arch/powerpc/kernel/dma_64.c
@@ -50,32 +50,38 @@ static void dma_iommu_free_coherent(struct device *dev, size_t size,
  */
 static dma_addr_t dma_iommu_map_single(struct device *dev, void *vaddr,
                                        size_t size,
-                                       enum dma_data_direction direction)
+                                       enum dma_data_direction direction,
+                                       struct dma_attrs *attrs)
 {
         return iommu_map_single(dev, dev->archdata.dma_data, vaddr, size,
-                                device_to_mask(dev), direction);
+                                device_to_mask(dev), direction, attrs);
 }
 
 
 static void dma_iommu_unmap_single(struct device *dev, dma_addr_t dma_handle,
                                    size_t size,
-                                   enum dma_data_direction direction)
+                                   enum dma_data_direction direction,
+                                   struct dma_attrs *attrs)
 {
-        iommu_unmap_single(dev->archdata.dma_data, dma_handle, size, direction);
+        iommu_unmap_single(dev->archdata.dma_data, dma_handle, size, direction,
+                           attrs);
 }
 
 
 static int dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
-                            int nelems, enum dma_data_direction direction)
+                            int nelems, enum dma_data_direction direction,
+                            struct dma_attrs *attrs)
 {
         return iommu_map_sg(dev, dev->archdata.dma_data, sglist, nelems,
-                            device_to_mask(dev), direction);
+                            device_to_mask(dev), direction, attrs);
 }
 
 static void dma_iommu_unmap_sg(struct device *dev, struct scatterlist *sglist,
-                int nelems, enum dma_data_direction direction)
+                int nelems, enum dma_data_direction direction,
+                struct dma_attrs *attrs)
 {
-        iommu_unmap_sg(dev->archdata.dma_data, sglist, nelems, direction);
+        iommu_unmap_sg(dev->archdata.dma_data, sglist, nelems, direction,
+                       attrs);
 }
 
 /* We support DMA to/from any memory page via the iommu */
@@ -148,19 +154,22 @@ static void dma_direct_free_coherent(struct device *dev, size_t size,
 
 static dma_addr_t dma_direct_map_single(struct device *dev, void *ptr,
                                         size_t size,
-                                        enum dma_data_direction direction)
+                                        enum dma_data_direction direction,
+                                        struct dma_attrs *attrs)
 {
         return virt_to_abs(ptr) + get_dma_direct_offset(dev);
 }
 
 static void dma_direct_unmap_single(struct device *dev, dma_addr_t dma_addr,
                                     size_t size,
-                                    enum dma_data_direction direction)
+                                    enum dma_data_direction direction,
+                                    struct dma_attrs *attrs)
 {
 }
 
 static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,
-                             int nents, enum dma_data_direction direction)
+                             int nents, enum dma_data_direction direction,
+                             struct dma_attrs *attrs)
 {
         struct scatterlist *sg;
         int i;
@@ -174,7 +183,8 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,
 }
 
 static void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sg,
-                                int nents, enum dma_data_direction direction)
+                                int nents, enum dma_data_direction direction,
+                                struct dma_attrs *attrs)
 {
 }
 
diff --git a/arch/powerpc/kernel/ibmebus.c b/arch/powerpc/kernel/ibmebus.c
index 9971159c8040..e3b1fcd6d991 100644
--- a/arch/powerpc/kernel/ibmebus.c
+++ b/arch/powerpc/kernel/ibmebus.c
@@ -82,7 +82,8 @@ static void ibmebus_free_coherent(struct device *dev,
 static dma_addr_t ibmebus_map_single(struct device *dev,
                                      void *ptr,
                                      size_t size,
-                                     enum dma_data_direction direction)
+                                     enum dma_data_direction direction,
+                                     struct dma_attrs *attrs)
 {
         return (dma_addr_t)(ptr);
 }
@@ -90,14 +91,16 @@ static dma_addr_t ibmebus_map_single(struct device *dev,
 static void ibmebus_unmap_single(struct device *dev,
                                  dma_addr_t dma_addr,
                                  size_t size,
-                                 enum dma_data_direction direction)
+                                 enum dma_data_direction direction,
+                                 struct dma_attrs *attrs)
 {
         return;
 }
 
 static int ibmebus_map_sg(struct device *dev,
                           struct scatterlist *sgl,
-                          int nents, enum dma_data_direction direction)
+                          int nents, enum dma_data_direction direction,
+                          struct dma_attrs *attrs)
 {
         struct scatterlist *sg;
         int i;
@@ -112,7 +115,8 @@ static int ibmebus_map_sg(struct device *dev,
 
 static void ibmebus_unmap_sg(struct device *dev,
                              struct scatterlist *sg,
-                             int nents, enum dma_data_direction direction)
+                             int nents, enum dma_data_direction direction,
+                             struct dma_attrs *attrs)
 {
         return;
 }
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index ccf00fe9cee6..8c68ee9e5d1c 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -269,7 +269,8 @@ static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr,
 
 int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
                  struct scatterlist *sglist, int nelems,
-                 unsigned long mask, enum dma_data_direction direction)
+                 unsigned long mask, enum dma_data_direction direction,
+                 struct dma_attrs *attrs)
 {
         dma_addr_t dma_next = 0, dma_addr;
         unsigned long flags;
@@ -411,7 +412,8 @@ int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
 
 
 void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,
-                int nelems, enum dma_data_direction direction)
+                int nelems, enum dma_data_direction direction,
+                struct dma_attrs *attrs)
 {
         struct scatterlist *sg;
         unsigned long flags;
@@ -553,7 +555,7 @@ void iommu_free_table(struct iommu_table *tbl, const char *node_name)
  */
 dma_addr_t iommu_map_single(struct device *dev, struct iommu_table *tbl,
                             void *vaddr, size_t size, unsigned long mask,
-                            enum dma_data_direction direction)
+                enum dma_data_direction direction, struct dma_attrs *attrs)
 {
         dma_addr_t dma_handle = DMA_ERROR_CODE;
         unsigned long uaddr;
@@ -586,7 +588,8 @@ dma_addr_t iommu_map_single(struct device *dev, struct iommu_table *tbl,
 }
 
 void iommu_unmap_single(struct iommu_table *tbl, dma_addr_t dma_handle,
-                size_t size, enum dma_data_direction direction)
+                size_t size, enum dma_data_direction direction,
+                struct dma_attrs *attrs)
 {
         unsigned int npages;
 
diff --git a/arch/powerpc/platforms/iseries/iommu.c b/arch/powerpc/platforms/iseries/iommu.c
index 11fa3c772ed5..ab5d8687c3cf 100644
--- a/arch/powerpc/platforms/iseries/iommu.c
+++ b/arch/powerpc/platforms/iseries/iommu.c
@@ -214,13 +214,13 @@ dma_addr_t iseries_hv_map(void *vaddr, size_t size,
                         enum dma_data_direction direction)
 {
         return iommu_map_single(NULL, &vio_iommu_table, vaddr, size,
-                                DMA_32BIT_MASK, direction);
+                                DMA_32BIT_MASK, direction, NULL);
 }
 
 void iseries_hv_unmap(dma_addr_t dma_handle, size_t size,
                         enum dma_data_direction direction)
 {
-        iommu_unmap_single(&vio_iommu_table, dma_handle, size, direction);
+        iommu_unmap_single(&vio_iommu_table, dma_handle, size, direction, NULL);
 }
 
 void __init iommu_vio_init(void)
diff --git a/arch/powerpc/platforms/ps3/system-bus.c b/arch/powerpc/platforms/ps3/system-bus.c
index cf215e981c3e..d66c3628a112 100644
--- a/arch/powerpc/platforms/ps3/system-bus.c
+++ b/arch/powerpc/platforms/ps3/system-bus.c
@@ -555,7 +555,7 @@ static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
  */
 
 static dma_addr_t ps3_sb_map_single(struct device *_dev, void *ptr, size_t size,
-        enum dma_data_direction direction)
+        enum dma_data_direction direction, struct dma_attrs *attrs)
 {
         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
         int result;
@@ -575,7 +575,8 @@ static dma_addr_t ps3_sb_map_single(struct device *_dev, void *ptr, size_t size,
 
 static dma_addr_t ps3_ioc0_map_single(struct device *_dev, void *ptr,
                                       size_t size,
-                                      enum dma_data_direction direction)
+                                      enum dma_data_direction direction,
+                                      struct dma_attrs *attrs)
 {
         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
         int result;
@@ -608,7 +609,7 @@ static dma_addr_t ps3_ioc0_map_single(struct device *_dev, void *ptr,
 }
 
 static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
-        size_t size, enum dma_data_direction direction)
+        size_t size, enum dma_data_direction direction, struct dma_attrs *attrs)
 {
         struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
         int result;
@@ -622,7 +623,7 @@ static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
 }
 
 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
-        int nents, enum dma_data_direction direction)
+        int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
 {
 #if defined(CONFIG_PS3_DYNAMIC_DMA)
         BUG_ON("do");
@@ -651,14 +652,15 @@ static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
 
 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
                            int nents,
-                           enum dma_data_direction direction)
+                           enum dma_data_direction direction,
+                           struct dma_attrs *attrs)
 {
         BUG();
         return 0;
 }
 
 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
-        int nents, enum dma_data_direction direction)
+        int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
 {
 #if defined(CONFIG_PS3_DYNAMIC_DMA)
         BUG_ON("do");
@@ -666,7 +668,8 @@ static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
 }
 
 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
-                            int nents, enum dma_data_direction direction)
+                            int nents, enum dma_data_direction direction,
+                            struct dma_attrs *attrs)
 {
         BUG();
 }
diff --git a/include/asm-powerpc/dma-mapping.h b/include/asm-powerpc/dma-mapping.h
index bbefb69bfb67..de1395023cb1 100644
--- a/include/asm-powerpc/dma-mapping.h
+++ b/include/asm-powerpc/dma-mapping.h
@@ -13,6 +13,7 @@
 /* need struct page definitions */
 #include <linux/mm.h>
 #include <linux/scatterlist.h>
+#include <linux/dma-attrs.h>
 #include <asm/io.h>
 
 #define DMA_ERROR_CODE          (~(dma_addr_t)0x0)
@@ -53,13 +54,17 @@ struct dma_mapping_ops {
         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);
+                                size_t size, enum dma_data_direction direction,
+                                struct dma_attrs *attrs);
         void            (*unmap_single)(struct device *dev, dma_addr_t dma_addr,
-                                size_t size, enum dma_data_direction direction);
+                                size_t size, enum dma_data_direction direction,
+                                struct dma_attrs *attrs);
         int             (*map_sg)(struct device *dev, struct scatterlist *sg,
-                                int nents, enum dma_data_direction direction);
+                                int nents, enum dma_data_direction direction,
+                                struct dma_attrs *attrs);
         void            (*unmap_sg)(struct device *dev, struct scatterlist *sg,
-                                int nents, enum dma_data_direction direction);
+                                int nents, enum dma_data_direction direction,
+                                struct dma_attrs *attrs);
         int             (*dma_supported)(struct device *dev, u64 mask);
         int             (*set_dma_mask)(struct device *dev, u64 dma_mask);
 };
@@ -109,6 +114,77 @@ static inline int dma_set_mask(struct device *dev, u64 dma_mask)
         return 0;
 }
 
+static inline dma_addr_t dma_map_single_attrs(struct device *dev,
+                                              void *cpu_addr,
+                                              size_t size,
+                                              enum dma_data_direction direction,
+                                              struct dma_attrs *attrs)
+{
+        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+        BUG_ON(!dma_ops);
+        return dma_ops->map_single(dev, cpu_addr, size, direction, attrs);
+}
+
+static inline void dma_unmap_single_attrs(struct device *dev,
+                                          dma_addr_t dma_addr,
+                                          size_t size,
+                                          enum dma_data_direction direction,
+                                          struct dma_attrs *attrs)
+{
+        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+        BUG_ON(!dma_ops);
+        dma_ops->unmap_single(dev, dma_addr, size, direction, attrs);
+}
+
+static inline dma_addr_t dma_map_page_attrs(struct device *dev,
+                                            struct page *page,
+                                            unsigned long offset, size_t size,
+                                            enum dma_data_direction direction,
+                                            struct dma_attrs *attrs)
+{
+        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+        BUG_ON(!dma_ops);
+        return dma_ops->map_single(dev, page_address(page) + offset, size,
+                        direction, attrs);
+}
+
+static inline void dma_unmap_page_attrs(struct device *dev,
+                                        dma_addr_t dma_address,
+                                        size_t size,
+                                        enum dma_data_direction direction,
+                                        struct dma_attrs *attrs)
+{
+        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+        BUG_ON(!dma_ops);
+        dma_ops->unmap_single(dev, dma_address, size, direction, attrs);
+}
+
+static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
+                                   int nents, enum dma_data_direction direction,
+                                   struct dma_attrs *attrs)
+{
+        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+        BUG_ON(!dma_ops);
+        return dma_ops->map_sg(dev, sg, nents, direction, attrs);
+}
+
+static inline void dma_unmap_sg_attrs(struct device *dev,
+                                      struct scatterlist *sg,
+                                      int nhwentries,
+                                      enum dma_data_direction direction,
+                                      struct dma_attrs *attrs)
+{
+        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
+
+        BUG_ON(!dma_ops);
+        dma_ops->unmap_sg(dev, sg, nhwentries, direction, attrs);
+}
+
 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
                                        dma_addr_t *dma_handle, gfp_t flag)
 {
@@ -131,63 +207,43 @@ static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
                                         size_t size,
                                         enum dma_data_direction direction)
 {
-        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-        BUG_ON(!dma_ops);
-        return dma_ops->map_single(dev, cpu_addr, size, direction);
+        return dma_map_single_attrs(dev, cpu_addr, size, direction, NULL);
 }
 
 static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
                                     size_t size,
                                     enum dma_data_direction direction)
 {
-        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-        BUG_ON(!dma_ops);
-        dma_ops->unmap_single(dev, dma_addr, size, direction);
+        dma_unmap_single_attrs(dev, dma_addr, size, direction, NULL);
 }
 
 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
                                       unsigned long offset, size_t size,
                                       enum dma_data_direction direction)
 {
-        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-        BUG_ON(!dma_ops);
-        return dma_ops->map_single(dev, page_address(page) + offset, size,
-                        direction);
+        return dma_map_page_attrs(dev, page, offset, size, direction, NULL);
 }
 
 static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
                                   size_t size,
                                   enum dma_data_direction direction)
 {
-        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-        BUG_ON(!dma_ops);
-        dma_ops->unmap_single(dev, dma_address, size, direction);
+        dma_unmap_page_attrs(dev, dma_address, size, direction, NULL);
 }
 
 static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
                              int nents, enum dma_data_direction direction)
 {
-        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-        BUG_ON(!dma_ops);
-        return dma_ops->map_sg(dev, sg, nents, direction);
+        return dma_map_sg_attrs(dev, sg, nents, direction, NULL);
 }
 
 static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
                                 int nhwentries,
                                 enum dma_data_direction direction)
 {
-        struct dma_mapping_ops *dma_ops = get_dma_ops(dev);
-
-        BUG_ON(!dma_ops);
-        dma_ops->unmap_sg(dev, sg, nhwentries, direction);
+        dma_unmap_sg_attrs(dev, sg, nhwentries, direction, NULL);
 }
 
-
 /*
  * Available generic sets of operations
  */
diff --git a/include/asm-powerpc/iommu.h b/include/asm-powerpc/iommu.h
index 65f6682bee87..51ecfef8d843 100644
--- a/include/asm-powerpc/iommu.h
+++ b/include/asm-powerpc/iommu.h
@@ -81,9 +81,11 @@ 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);
+                        unsigned long mask, enum dma_data_direction direction,
+                        struct dma_attrs *attrs);
 extern void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,
-                           int nelems, enum dma_data_direction direction);
+                           int nelems, enum dma_data_direction direction,
+                           struct dma_attrs *attrs);
 
 extern void *iommu_alloc_coherent(struct device *dev, struct iommu_table *tbl,
                                   size_t size, dma_addr_t *dma_handle,
@@ -92,9 +94,11 @@ 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 device *dev, struct iommu_table *tbl,
                                    void *vaddr, size_t size, unsigned long mask,
-                                   enum dma_data_direction direction);
+                                   enum dma_data_direction direction,
+                                   struct dma_attrs *attrs);
 extern void iommu_unmap_single(struct iommu_table *tbl, dma_addr_t dma_handle,
-                               size_t size, enum dma_data_direction direction);
+                               size_t size, enum dma_data_direction direction,
+                               struct dma_attrs *attrs);
 
 extern void iommu_init_early_pSeries(void);
 extern void iommu_init_early_iSeries(void);