leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Blackfin arch: push cache flushing up to dma_memcpy

Browse Source 
push cache flushing up to dma_memcpy() so that we call the flush
functions just once

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Mike Frysinger 2009-01-07 23:14:39 +08:00 committed by Bryan Wu
parent 596b565bd1
commit 7ad883a94d
1 changed files with 14 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
arch/blackfin/kernel/bfin_dma_5xx.c
View File

@ -304,7 +304,7 @@ static void __dma_memcpy(u32 daddr, s16 dmod, u32 saddr, s16 smod, size_t cnt, u
* _dma_memcpy - translate C memcpy settings into MDMA settings
*
* Handle all the high level steps before we touch the MDMA registers. So
* handle caching, tweaking of sizes, and formatting of addresses.
* handle direction, tweaking of sizes, and formatting of addresses.
*/
static void *_dma_memcpy(void *pdst, const void *psrc, size_t size)
{
@ -316,12 +316,6 @@ static void *_dma_memcpy(void *pdst, const void *psrc, size_t size)
if (size == 0)
return NULL;
if (bfin_addr_dcachable(src))
blackfin_dcache_flush_range(src, src + size);
if (bfin_addr_dcachable(dst))
blackfin_dcache_invalidate_range(dst, dst + size);
if (dst % 4 == 0 && src % 4 == 0 && size % 4 == 0) {
conf = WDSIZE_32;
shift = 2;
@ -360,15 +354,24 @@ static void *_dma_memcpy(void *pdst, const void *psrc, size_t size)
* up into two pieces. The first transfer is in multiples of 64k and the
* second transfer is the piece smaller than 64k.
*/
void *dma_memcpy(void *dst, const void *src, size_t size)
void *dma_memcpy(void *pdst, const void *psrc, size_t size)
{
unsigned long dst = (unsigned long)pdst;
unsigned long src = (unsigned long)psrc;
size_t bulk, rest;
if (bfin_addr_dcachable(src))
blackfin_dcache_flush_range(src, src + size);
if (bfin_addr_dcachable(dst))
blackfin_dcache_invalidate_range(dst, dst + size);
bulk = size & ~0xffff;
rest = size - bulk;
if (bulk)
_dma_memcpy(dst, src, bulk);
_dma_memcpy(dst + bulk, src + bulk, rest);
return dst;
_dma_memcpy(pdst, psrc, bulk);
_dma_memcpy(pdst + bulk, psrc + bulk, rest);
return pdst;
}
EXPORT_SYMBOL(dma_memcpy);