This matches how this would be done in Linux and these functions
do the alignment for us which makes the code look cleaner.
Signed-off-by: Andrew Davis <a...@ti.com>
---
common/bouncebuf.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/common/bouncebuf.c b/common/bouncebuf.c
index 6d98920de66..93a35668cc2 100644
--- a/common/bouncebuf.c
+++ b/common/bouncebuf.c
@@ -12,6 +12,7 @@
#include <errno.h>
#include <bouncebuf.h>
#include <asm/cache.h>
+#include <linux/dma-mapping.h>
static int addr_aligned(struct bounce_buffer *state)
{
@@ -59,9 +60,9 @@ int bounce_buffer_start_extalign(struct bounce_buffer *state,
void *data,
* Flush data to RAM so DMA reads can pick it up,
* and any CPU writebacks don't race with DMA writes
*/
- flush_dcache_range((unsigned long)state->bounce_buffer,
- (unsigned long)(state->bounce_buffer) +
- state->len_aligned);
+ dma_map_single(state->bounce_buffer,
+ state->len_aligned,
+ DMA_BIDIRECTIONAL);
return 0;
}
@@ -78,9 +79,9 @@ int bounce_buffer_stop(struct bounce_buffer *state)
{
if (state->flags & GEN_BB_WRITE) {
/* Invalidate cache so that CPU can see any newly DMA'd data */
- invalidate_dcache_range((unsigned long)state->bounce_buffer,
- (unsigned long)(state->bounce_buffer) +
- state->len_aligned);
+ dma_unmap_single((dma_addr_t)state->bounce_buffer,
+ state->len_aligned,
+ DMA_BIDIRECTIONAL);
}
if (state->bounce_buffer == state->user_buffer)
--
2.38.1
