Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-10 15:14:43 +00:00
Code Issues Projects Releases Packages Wiki Activity

common: bouncebuf: Use dma-mapping for cache ops

Browse source 
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 <afd@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Andrew Davis 2023-01-06 12:02:50 -06:00 committed by Tom Rini
parent 9787ecfd0d
commit b75ca26b22
1 changed files with 7 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
common/bouncebuf.c
View file

@ -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)