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Subject[PATCH 20/32] Blackfin arch: dma_memcpy borken for > 64K
Date
From: Aubrey Li <aubrey.li@analog.com>

Signed-off-by: Aubrey Li <aubrey.li@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
---
arch/blackfin/kernel/bfin_dma_5xx.c | 17 ++++++++++++++++-
1 files changed, 16 insertions(+), 1 deletions(-)

diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
index 1c344ac..0ccb0dc 100644
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -595,7 +595,7 @@ unsigned short get_dma_curr_ycount(unsigned int channel)
}
EXPORT_SYMBOL(get_dma_curr_ycount);

-void *dma_memcpy(void *dest, const void *src, size_t size)
+void *_dma_memcpy(void *dest, const void *src, size_t size)
{
int direction; /* 1 - address decrease, 0 - address increase */
int flag_align; /* 1 - address aligned, 0 - address unaligned */
@@ -734,6 +734,21 @@ void *dma_memcpy(void *dest, const void *src, size_t size)

return dest;
}
+
+void *dma_memcpy(void *dest, const void *src, size_t size)
+{
+ size_t bulk;
+ size_t rest;
+ void * addr;
+
+ bulk = (size >> 16) << 16;
+ rest = size - bulk;
+ if (bulk)
+ _dma_memcpy(dest, src, bulk);
+ addr = _dma_memcpy(dest+bulk, src+bulk, rest);
+ return addr;
+}
+
EXPORT_SYMBOL(dma_memcpy);

void *safe_dma_memcpy(void *dest, const void *src, size_t size)
--
1.5.1.2
-
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