dmaengine: mv_xor: Enlarge descriptor pool size

Now that we have 2 channels assigned to 2 CPUs and all requests are chained
on same channels, we need much more descriptors available to satisfy
async_tx workload.

3072 descriptors was found in our lab as the number of descriptors which
allow the async_tx stack to work without waiting for free descriptors on
submission of new requests.

Signed-off-by: Lior Amsalem <alior@marvell.com>
Reviewed-by: Nadav Haklai <nadavh@marvell.com>
Tested-by: Nadav Haklai <nadavh@marvell.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h
index ac1ce87935de71ea14cb7cab38cc876e1608ae4a..6b10c8c647b9a1f62df9b57935aae006ede1bee5 100644 (file)
--- a/drivers/dma/mv_xor.h
+++ b/drivers/dma/mv_xor.h
@@ -19,7 +19,7 @@
 #include <linux/dmaengine.h>
 #include <linux/interrupt.h>
 
-#define MV_XOR_POOL_SIZE               PAGE_SIZE
+#define MV_XOR_POOL_SIZE               (MV_XOR_SLOT_SIZE * 3072)
 #define MV_XOR_SLOT_SIZE               64
 #define MV_XOR_THRESHOLD               1
 #define MV_XOR_MAX_CHANNELS             2