add dma_get_ops to struct ia64_machine_vector

This adds dma_get_ops hook to struct ia64_machine_vector. We use
dma_get_ops() in arch/ia64/kernel/dma-mapping.c, which simply returns
the global dma_ops. This is for removing hwsw_dma_ops.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

4 files changed, 39 insertions, 18 deletions

diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h
index 5298f4064e3c..bac3159379f7 100644
--- a/arch/ia64/include/asm/dma-mapping.h
+++ b/arch/ia64/include/asm/dma-mapping.h
@@ -68,13 +68,15 @@ extern void set_iommu_machvec(void);
 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
                                        dma_addr_t *daddr, gfp_t gfp)
 {
-        return dma_ops->alloc_coherent(dev, size, daddr, gfp | GFP_DMA);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        return ops->alloc_coherent(dev, size, daddr, gfp | GFP_DMA);
 }
 
 static inline void dma_free_coherent(struct device *dev, size_t size,
                                      void *caddr, dma_addr_t daddr)
 {
-        dma_ops->free_coherent(dev, size, caddr, daddr);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        ops->free_coherent(dev, size, caddr, daddr);
 }
 
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
@@ -85,7 +87,8 @@ static inline dma_addr_t dma_map_single_attrs(struct device *dev,
                                               enum dma_data_direction dir,
                                               struct dma_attrs *attrs)
 {
-        return dma_ops->map_single_attrs(dev, caddr, size, dir, attrs);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        return ops->map_single_attrs(dev, caddr, size, dir, attrs);
 }
 
 static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t daddr,
@@ -93,7 +96,8 @@ static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t daddr,
                                           enum dma_data_direction dir,
                                           struct dma_attrs *attrs)
 {
-        dma_ops->unmap_single_attrs(dev, daddr, size, dir, attrs);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        ops->unmap_single_attrs(dev, daddr, size, dir, attrs);
 }
 
 #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
@@ -103,7 +107,8 @@ static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
                                    int nents, enum dma_data_direction dir,
                                    struct dma_attrs *attrs)
 {
-        return dma_ops->map_sg_attrs(dev, sgl, nents, dir, attrs);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        return ops->map_sg_attrs(dev, sgl, nents, dir, attrs);
 }
 
 static inline void dma_unmap_sg_attrs(struct device *dev,
@@ -111,7 +116,8 @@ static inline void dma_unmap_sg_attrs(struct device *dev,
                                       enum dma_data_direction dir,
                                       struct dma_attrs *attrs)
 {
-        dma_ops->unmap_sg_attrs(dev, sgl, nents, dir, attrs);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        ops->unmap_sg_attrs(dev, sgl, nents, dir, attrs);
 }
 
 #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
@@ -121,14 +127,16 @@ static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t daddr,
                                            size_t size,
                                            enum dma_data_direction dir)
 {
-        dma_ops->sync_single_for_cpu(dev, daddr, size, dir);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        ops->sync_single_for_cpu(dev, daddr, size, dir);
 }
 
 static inline void dma_sync_sg_for_cpu(struct device *dev,
                                        struct scatterlist *sgl,
                                        int nents, enum dma_data_direction dir)
 {
-        dma_ops->sync_sg_for_cpu(dev, sgl, nents, dir);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        ops->sync_sg_for_cpu(dev, sgl, nents, dir);
 }
 
 static inline void dma_sync_single_for_device(struct device *dev,
@@ -136,7 +144,8 @@ static inline void dma_sync_single_for_device(struct device *dev,
                                               size_t size,
                                               enum dma_data_direction dir)
 {
-        dma_ops->sync_single_for_device(dev, daddr, size, dir);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        ops->sync_single_for_device(dev, daddr, size, dir);
 }
 
 static inline void dma_sync_sg_for_device(struct device *dev,
@@ -144,12 +153,14 @@ static inline void dma_sync_sg_for_device(struct device *dev,
                                           int nents,
                                           enum dma_data_direction dir)
 {
-        dma_ops->sync_sg_for_device(dev, sgl, nents, dir);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        ops->sync_sg_for_device(dev, sgl, nents, dir);
 }
 
 static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
 {
-        return dma_ops->mapping_error(dev, daddr);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        return ops->mapping_error(dev, daddr);
 }
 
 #define dma_map_page(dev, pg, off, size, dir)                           \
@@ -169,7 +180,8 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
 
 static inline int dma_supported(struct device *dev, u64 mask)
 {
-        return dma_ops->dma_supported_op(dev, mask);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+        return ops->dma_supported_op(dev, mask);
 }
 
 static inline int
@@ -196,9 +208,4 @@ dma_cache_sync (struct device *dev, void *vaddr, size_t size,
 
 #define dma_is_consistent(d, h) (1)     /* all we do is coherent memory... */
 
-static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
-{
-        return dma_ops;
-}
-
 #endif /* _ASM_IA64_DMA_MAPPING_H */
diff --git a/arch/ia64/include/asm/machvec.h b/arch/ia64/include/asm/machvec.h
index 6be3010d746a..95e1708fa4e3 100644
--- a/arch/ia64/include/asm/machvec.h
+++ b/arch/ia64/include/asm/machvec.h
@@ -45,6 +45,7 @@ typedef void ia64_mv_kernel_launch_event_t(void);
 
 /* DMA-mapping interface: */
 typedef void ia64_mv_dma_init (void);
+typedef struct dma_mapping_ops *ia64_mv_dma_get_ops(struct device *);
 
 /*
  * WARNING: The legacy I/O space is _architected_.  Platforms are
@@ -130,6 +131,7 @@ extern void machvec_tlb_migrate_finish (struct mm_struct *);
 #  define platform_global_tlb_purge     ia64_mv.global_tlb_purge
 #  define platform_tlb_migrate_finish   ia64_mv.tlb_migrate_finish
 #  define platform_dma_init             ia64_mv.dma_init
+#  define platform_dma_get_ops          ia64_mv.dma_get_ops
 #  define platform_irq_to_vector        ia64_mv.irq_to_vector
 #  define platform_local_vector_to_irq  ia64_mv.local_vector_to_irq
 #  define platform_pci_get_legacy_mem   ia64_mv.pci_get_legacy_mem
@@ -172,6 +174,7 @@ struct ia64_machine_vector {
         ia64_mv_global_tlb_purge_t *global_tlb_purge;
         ia64_mv_tlb_migrate_finish_t *tlb_migrate_finish;
         ia64_mv_dma_init *dma_init;
+        ia64_mv_dma_get_ops *dma_get_ops;
         ia64_mv_irq_to_vector *irq_to_vector;
         ia64_mv_local_vector_to_irq *local_vector_to_irq;
         ia64_mv_pci_get_legacy_mem_t *pci_get_legacy_mem;
@@ -210,6 +213,7 @@ struct ia64_machine_vector {
         platform_global_tlb_purge,              \
         platform_tlb_migrate_finish,            \
         platform_dma_init,                      \
+        platform_dma_get_ops,                   \
         platform_irq_to_vector,                 \
         platform_local_vector_to_irq,           \
         platform_pci_get_legacy_mem,            \
@@ -246,6 +250,7 @@ extern void machvec_init_from_cmdline(const char *cmdline);
 # endif /* CONFIG_IA64_GENERIC */
 
 extern void swiotlb_dma_init(void);
+extern struct dma_mapping_ops *dma_get_ops(struct device *);
 
 /*
  * Define default versions so we can extend machvec for new platforms without having
@@ -279,6 +284,9 @@ extern void swiotlb_dma_init(void);
 #ifndef platform_dma_init
 # define platform_dma_init              swiotlb_dma_init
 #endif
+#ifndef platform_dma_get_ops
+# define platform_dma_get_ops           dma_get_ops
+#endif
 #ifndef platform_irq_to_vector
 # define platform_irq_to_vector         __ia64_irq_to_vector
 #endif
diff --git a/arch/ia64/kernel/dma-mapping.c b/arch/ia64/kernel/dma-mapping.c
index 876665ae9fff..427f69617226 100644
--- a/arch/ia64/kernel/dma-mapping.c
+++ b/arch/ia64/kernel/dma-mapping.c
@@ -2,3 +2,9 @@
 
 struct dma_mapping_ops *dma_ops;
 EXPORT_SYMBOL(dma_ops);
+
+struct dma_mapping_ops *dma_get_ops(struct device *dev)
+{
+        return dma_ops;
+}
+EXPORT_SYMBOL(dma_get_ops);
diff --git a/arch/ia64/kernel/pci-dma.c b/arch/ia64/kernel/pci-dma.c
index 1c1224bd0179..640669eba5d4 100644
--- a/arch/ia64/kernel/pci-dma.c
+++ b/arch/ia64/kernel/pci-dma.c
@@ -81,7 +81,7 @@ iommu_dma_init(void)
 
 int iommu_dma_supported(struct device *dev, u64 mask)
 {
-        struct dma_mapping_ops *ops = get_dma_ops(dev);
+        struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
 
         if (ops->dma_supported_op)
                 return ops->dma_supported_op(dev, mask);