Blackfin: dma-mapping.h: flesh out missing DMA mapping functions
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/include/asm/dma-mapping.h b/arch/blackfin/include/asm/dma-mapping.h
index 7a23d82..f9172ff 100644
--- a/arch/blackfin/include/asm/dma-mapping.h
+++ b/arch/blackfin/include/asm/dma-mapping.h
@@ -7,9 +7,9 @@
#ifndef _BLACKFIN_DMA_MAPPING_H
#define _BLACKFIN_DMA_MAPPING_H
-#include <asm/scatterlist.h>
+#include <asm/cacheflush.h>
+struct scatterlist;
-void dma_alloc_init(unsigned long start, unsigned long end);
void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp);
void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
@@ -20,13 +20,51 @@
*/
#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_supported(d, m) (1)
+#define dma_get_cache_alignment() (32)
+#define dma_is_consistent(d, h) (1)
-static inline
-int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+static inline int
+dma_set_mask(struct device *dev, u64 dma_mask)
+{
+ if (!dev->dma_mask || !dma_supported(dev, dma_mask))
+ return -EIO;
+
+ *dev->dma_mask = dma_mask;
+
+ return 0;
+}
+
+static inline int
+dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
+extern void
+__dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir);
+static inline void
+_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir)
+{
+ if (!__builtin_constant_p(dir)) {
+ __dma_sync(addr, size, dir);
+ return;
+ }
+
+ switch (dir) {
+ case DMA_NONE:
+ BUG();
+ case DMA_TO_DEVICE: /* writeback only */
+ flush_dcache_range(addr, addr + size);
+ break;
+ case DMA_FROM_DEVICE: /* invalidate only */
+ case DMA_BIDIRECTIONAL: /* flush and invalidate */
+ /* Blackfin has no dedicated invalidate (it includes a flush) */
+ invalidate_dcache_range(addr, addr + size);
+ break;
+ }
+}
+
/*
* Map a single buffer of the indicated size for DMA in streaming mode.
* The 32-bit bus address to use is returned.
@@ -34,8 +72,13 @@
* Once the device is given the dma address, the device owns this memory
* until either pci_unmap_single or pci_dma_sync_single is performed.
*/
-extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
- enum dma_data_direction direction);
+static inline dma_addr_t
+dma_map_single(struct device *dev, void *ptr, size_t size,
+ enum dma_data_direction dir)
+{
+ _dma_sync((dma_addr_t)ptr, size, dir);
+ return (dma_addr_t) ptr;
+}
static inline dma_addr_t
dma_map_page(struct device *dev, struct page *page,
@@ -53,8 +96,12 @@
* After this call, reads by the cpu to the buffer are guarenteed to see
* whatever the device wrote there.
*/
-extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
- enum dma_data_direction direction);
+static inline void
+dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+ enum dma_data_direction dir)
+{
+ BUG_ON(!valid_dma_direction(dir));
+}
static inline void
dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
@@ -80,38 +127,66 @@
* the same here.
*/
extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
- enum dma_data_direction direction);
+ enum dma_data_direction dir);
/*
* Unmap a set of streaming mode DMA translations.
* Again, cpu read rules concerning calls here are the same as for
* pci_unmap_single() above.
*/
-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 handle, size_t size,
- enum dma_data_direction dir)
+static inline void
+dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+ int nhwentries, enum dma_data_direction dir)
{
+ BUG_ON(!valid_dma_direction(dir));
}
-static inline void dma_sync_single_for_device(struct device *dev,
- dma_addr_t handle, size_t size,
- enum dma_data_direction dir)
+static inline void
+dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t handle,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir)
{
+ BUG_ON(!valid_dma_direction(dir));
}
-static inline void dma_sync_sg_for_cpu(struct device *dev,
- struct scatterlist *sg,
- int nents, enum dma_data_direction dir)
+static inline void
+dma_sync_single_range_for_device(struct device *dev, dma_addr_t handle,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir)
{
+ _dma_sync(handle + offset, size, dir);
}
-static inline void dma_sync_sg_for_device(struct device *dev,
- struct scatterlist *sg,
- int nents, enum dma_data_direction dir)
+static inline void
+dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size,
+ enum dma_data_direction dir)
{
+ dma_sync_single_range_for_cpu(dev, handle, 0, size, dir);
+}
+
+static inline void
+dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size,
+ enum dma_data_direction dir)
+{
+ dma_sync_single_range_for_device(dev, handle, 0, size, dir);
+}
+
+static inline void
+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
+ enum dma_data_direction dir)
+{
+ BUG_ON(!valid_dma_direction(dir));
+}
+
+extern void
+dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir);
+
+static inline void
+dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+ enum dma_data_direction dir)
+{
+ _dma_sync((dma_addr_t)vaddr, size, dir);
}
#endif /* _BLACKFIN_DMA_MAPPING_H */
diff --git a/arch/blackfin/include/asm/dma.h b/arch/blackfin/include/asm/dma.h
index 5eb2950..bd2e622 100644
--- a/arch/blackfin/include/asm/dma.h
+++ b/arch/blackfin/include/asm/dma.h
@@ -13,8 +13,7 @@
#include <asm/atomic.h>
#include <asm/blackfin.h>
#include <asm/page.h>
-
-#define MAX_DMA_ADDRESS PAGE_OFFSET
+#include <asm-generic/dma.h>
/* DMA_CONFIG Masks */
#define DMAEN 0x0001 /* DMA Channel Enable */
@@ -257,8 +256,6 @@
dma_ch[channel].regs->curr_y_count = 0;
dma_ch[channel].regs->cfg |= DMAEN;
}
-void free_dma(unsigned int channel);
-int request_dma(unsigned int channel, const char *device_id);
int set_dma_callback(unsigned int channel, irq_handler_t callback, void *data);
static inline void dma_disable_irq(unsigned int channel)