Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
arch/nios2/Kconfig | 1 +
arch/nios2/include/asm/dma-mapping.h | 123 ++---------------------------
arch/nios2/mm/dma-mapping.c | 147 +++++++++++++++++++----------------
3 files changed, 85 insertions(+), 186 deletions(-)
diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig
index 4375554..4b2504d 100644
--- a/arch/nios2/Kconfig
+++ b/arch/nios2/Kconfig
@@ -16,6 +16,7 @@ config NIOS2
select SOC_BUS
select SPARSE_IRQ
select USB_ARCH_HAS_HCD if USB_SUPPORT
+ select HAVE_DMA_ATTRS
config GENERIC_CSUM
def_bool y
diff --git a/arch/nios2/include/asm/dma-mapping.h b/arch/nios2/include/asm/dma-mapping.h
index b556723..bec8ac8 100644
--- a/arch/nios2/include/asm/dma-mapping.h
+++ b/arch/nios2/include/asm/dma-mapping.h
@@ -10,131 +10,20 @@
#ifndef _ASM_NIOS2_DMA_MAPPING_H
#define _ASM_NIOS2_DMA_MAPPING_H
-#include <linux/scatterlist.h>
-#include <linux/cache.h>
-#include <asm/cacheflush.h>
+extern struct dma_map_ops nios2_dma_ops;
-static inline void __dma_sync_for_device(void *vaddr, size_t size,
- enum dma_data_direction direction)
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
- switch (direction) {
- case DMA_FROM_DEVICE:
- invalidate_dcache_range((unsigned long)vaddr,
- (unsigned long)(vaddr + size));
- break;
- case DMA_TO_DEVICE:
- /*
- * We just need to flush the caches here , but Nios2 flush
- * instruction will do both writeback and invalidate.
- */
- case DMA_BIDIRECTIONAL: /* flush and invalidate */
- flush_dcache_range((unsigned long)vaddr,
- (unsigned long)(vaddr + size));
- break;
- default:
- BUG();
- }
-}
-
-static inline void __dma_sync_for_cpu(void *vaddr, size_t size,
- enum dma_data_direction direction)
-{
- switch (direction) {
- case DMA_BIDIRECTIONAL:
- case DMA_FROM_DEVICE:
- invalidate_dcache_range((unsigned long)vaddr,
- (unsigned long)(vaddr + size));
- break;
- case DMA_TO_DEVICE:
- break;
- default:
- BUG();
- }
-}
-
-#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)
-
-void *dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag);
-
-void dma_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle);
-
-static inline dma_addr_t dma_map_single(struct device *dev, void *ptr,
- size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(!valid_dma_direction(direction));
- __dma_sync_for_device(ptr, size, direction);
- return virt_to_phys(ptr);
-}
-
-static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
- 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 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 void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
- int nhwentries, enum dma_data_direction direction);
-extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
- size_t size, enum dma_data_direction direction);
-extern void dma_sync_single_for_device(struct device *dev,
- dma_addr_t dma_handle, size_t size, enum dma_data_direction direction);
-extern 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);
-extern 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);
-extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
- int nelems, enum dma_data_direction direction);
-extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
- int nelems, enum dma_data_direction direction);
-
-static inline int dma_supported(struct device *dev, u64 mask)
-{
- return 1;
-}
-
-static inline int dma_set_mask(struct device *dev, u64 mask)
-{
- if (!dev->dma_mask || !dma_supported(dev, mask))
- return -EIO;
-
- *dev->dma_mask = mask;
-
- return 0;
-}
-
-static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
- return 0;
+ return &nios2_dma_ops;
}
/*
-* dma_alloc_noncoherent() returns non-cacheable memory, so there's no need to
-* do any flushing here.
-*/
+ * dma_alloc_noncoherent() returns non-cacheable memory, so there's no need to
+ * do any flushing here.
+ */
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
}
-/* drivers/base/dma-mapping.c */
-extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
- void *cpu_addr, dma_addr_t dma_addr, size_t size);
-extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
- void *cpu_addr, dma_addr_t dma_addr,
- size_t size);
-
-#define dma_mmap_coherent(d, v, c, h, s) dma_common_mmap(d, v, c, h, s)
-#define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s)
-
#endif /* _ASM_NIOS2_DMA_MAPPING_H */
diff --git a/arch/nios2/mm/dma-mapping.c b/arch/nios2/mm/dma-mapping.c
index ac5da75..43c1149 100644
--- a/arch/nios2/mm/dma-mapping.c
+++ b/arch/nios2/mm/dma-mapping.c
@@ -20,9 +20,46 @@
#include <linux/cache.h>
#include <asm/cacheflush.h>
+static inline void __dma_sync_for_device(void *vaddr, size_t size,
+ enum dma_data_direction direction)
+{
+ switch (direction) {
+ case DMA_FROM_DEVICE:
+ invalidate_dcache_range((unsigned long)vaddr,
+ (unsigned long)(vaddr + size));
+ break;
+ case DMA_TO_DEVICE:
+ /*
+ * We just need to flush the caches here , but Nios2 flush
+ * instruction will do both writeback and invalidate.
+ */
+ case DMA_BIDIRECTIONAL: /* flush and invalidate */
+ flush_dcache_range((unsigned long)vaddr,
+ (unsigned long)(vaddr + size));
+ break;
+ default:
+ BUG();
+ }
+}
-void *dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp)
+static inline void __dma_sync_for_cpu(void *vaddr, size_t size,
+ enum dma_data_direction direction)
+{
+ switch (direction) {
+ case DMA_BIDIRECTIONAL:
+ case DMA_FROM_DEVICE:
+ invalidate_dcache_range((unsigned long)vaddr,
+ (unsigned long)(vaddr + size));
+ break;
+ case DMA_TO_DEVICE:
+ break;
+ default:
+ BUG();
+ }
+}
+
+static void *nios2_dma_alloc(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp, struct dma_attrs *attrs)
{
void *ret;
@@ -45,24 +82,21 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
return ret;
}
-EXPORT_SYMBOL(dma_alloc_coherent);
-void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle)
+static void nios2_dma_free(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle, struct dma_attrs *attrs)
{
unsigned long addr = (unsigned long) CAC_ADDR((unsigned long) vaddr);
free_pages(addr, get_order(size));
}
-EXPORT_SYMBOL(dma_free_coherent);
-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
- enum dma_data_direction direction)
+static int nios2_dma_map_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction direction,
+ struct dma_attrs *attrs)
{
int i;
- BUG_ON(!valid_dma_direction(direction));
-
for_each_sg(sg, sg, nents, i) {
void *addr;
@@ -75,40 +109,32 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
return nents;
}
-EXPORT_SYMBOL(dma_map_sg);
-dma_addr_t dma_map_page(struct device *dev, struct page *page,
+static dma_addr_t nios2_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
- enum dma_data_direction direction)
+ enum dma_data_direction direction,
+ struct dma_attrs *attrs)
{
- void *addr;
-
- BUG_ON(!valid_dma_direction(direction));
+ void *addr = page_address(page) + offset;
- addr = page_address(page) + offset;
__dma_sync_for_device(addr, size, direction);
-
return page_to_phys(page) + offset;
}
-EXPORT_SYMBOL(dma_map_page);
-void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
- enum dma_data_direction direction)
+static void nios2_dma_unmap_page(struct device *dev, dma_addr_t dma_address,
+ size_t size, enum dma_data_direction direction,
+ struct dma_attrs *attrs)
{
- BUG_ON(!valid_dma_direction(direction));
-
__dma_sync_for_cpu(phys_to_virt(dma_address), size, direction);
}
-EXPORT_SYMBOL(dma_unmap_page);
-void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
- enum dma_data_direction direction)
+static void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+ int nhwentries, enum dma_data_direction direction,
+ struct dma_attrs *attrs)
{
void *addr;
int i;
- BUG_ON(!valid_dma_direction(direction));
-
if (direction == DMA_TO_DEVICE)
return;
@@ -118,69 +144,52 @@ void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
__dma_sync_for_cpu(addr, sg->length, direction);
}
}
-EXPORT_SYMBOL(dma_unmap_sg);
-
-void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
- size_t size, enum dma_data_direction direction)
-{
- BUG_ON(!valid_dma_direction(direction));
- __dma_sync_for_cpu(phys_to_virt(dma_handle), size, direction);
-}
-EXPORT_SYMBOL(dma_sync_single_for_cpu);
-
-void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
- size_t size, enum dma_data_direction direction)
-{
- BUG_ON(!valid_dma_direction(direction));
-
- __dma_sync_for_device(phys_to_virt(dma_handle), size, direction);
-}
-EXPORT_SYMBOL(dma_sync_single_for_device);
-
-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 void nios2_dma_sync_single_for_cpu(struct device *dev,
+ dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction direction)
{
- BUG_ON(!valid_dma_direction(direction));
-
__dma_sync_for_cpu(phys_to_virt(dma_handle), size, direction);
}
-EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
-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 void nios2_dma_sync_single_for_device(struct device *dev,
+ dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction direction)
{
- BUG_ON(!valid_dma_direction(direction));
-
__dma_sync_for_device(phys_to_virt(dma_handle), size, direction);
}
-EXPORT_SYMBOL(dma_sync_single_range_for_device);
-void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
- enum dma_data_direction direction)
+static void nios2_dma_sync_sg_for_cpu(struct device *dev,
+ struct scatterlist *sg, int nelems,
+ enum dma_data_direction direction)
{
int i;
- BUG_ON(!valid_dma_direction(direction));
-
/* Make sure that gcc doesn't leave the empty loop body. */
for_each_sg(sg, sg, nelems, i)
__dma_sync_for_cpu(sg_virt(sg), sg->length, direction);
}
-EXPORT_SYMBOL(dma_sync_sg_for_cpu);
-void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
- int nelems, enum dma_data_direction direction)
+static void nios2_dma_sync_sg_for_device(struct device *dev,
+ struct scatterlist *sg, int nelems,
+ enum dma_data_direction direction)
{
int i;
- BUG_ON(!valid_dma_direction(direction));
-
/* Make sure that gcc doesn't leave the empty loop body. */
for_each_sg(sg, sg, nelems, i)
__dma_sync_for_device(sg_virt(sg), sg->length, direction);
}
-EXPORT_SYMBOL(dma_sync_sg_for_device);
+
+struct dma_map_ops nios2_dma_ops = {
+ .alloc = nios2_dma_alloc,
+ .free = nios2_dma_free,
+ .map_page = nios2_dma_map_page,
+ .map_sg = nios2_dma_map_sg,
+ .sync_single_for_device = nios2_dma_sync_single_for_device,
+ .sync_single_for_cpu = nios2_dma_sync_single_for_cpu,
+ .sync_sg_for_cpu = nios2_dma_sync_sg_for_cpu,
+ .sync_sg_for_dev = nios2_dma_sync_sg_for_device,
+};
+EXPORT_SYMBOL(nios2_dma_ops);
--
1.9.1
--
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