From: Lior Amsalem <alior@xxxxxxxxxxx>
Some engines (like Marvell mv_xor) do not support mult and sum_product
operations as part of the pq support.
This patch adds new flags: DMA_PREP_PQ_MULT & DMA_PREP_PQ_SUM_PRODUCT these
flags helps the driver identify such operations.
Signed-off-by: Lior Amsalem <alior@xxxxxxxxxxx>
Reviewed-by: Ofer Heifetz <oferh@xxxxxxxxxxx>
Reviewed-by: Nadav Haklai <nadavh@xxxxxxxxxxx>
Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
---
crypto/async_tx/async_raid6_recov.c | 4 ++--
include/linux/dmaengine.h | 4 ++++
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/crypto/async_tx/async_raid6_recov.c b/crypto/async_tx/async_raid6_recov.c
index 934a84981495..2db5486fd873 100644
--- a/crypto/async_tx/async_raid6_recov.c
+++ b/crypto/async_tx/async_raid6_recov.c
@@ -47,7 +47,7 @@ async_sum_product(struct page *dest, struct page **srcs, unsigned char *coef,
struct device *dev = dma->dev;
dma_addr_t pq[2];
struct dma_async_tx_descriptor *tx;
- enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P;
+ enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P | DMA_PREP_PQ_SUM_PRODUCT;
if (submit->flags & ASYNC_TX_FENCE)
dma_flags |= DMA_PREP_FENCE;
@@ -111,7 +111,7 @@ async_mult(struct page *dest, struct page *src, u8 coef, size_t len,
dma_addr_t dma_dest[2];
struct device *dev = dma->dev;
struct dma_async_tx_descriptor *tx;
- enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P;
+ enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P | DMA_PREP_PQ_MULT;
if (submit->flags & ASYNC_TX_FENCE)
dma_flags |= DMA_PREP_FENCE;
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index ad419757241f..f19ecebb4d3f 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -174,6 +174,8 @@ struct dma_interleaved_template {
* operation it continues the calculation with new sources
* @DMA_PREP_FENCE - tell the driver that subsequent operations depend
* on the result of this operation
+ * @DMA_PREP_PQ_MULT - tell the driver that this is a mult request
+ * @DMA_PREP_PQ_SUM_PRODUCT - tell the driver that this is a sum product request
*/
enum dma_ctrl_flags {
DMA_PREP_INTERRUPT = (1 << 0),
@@ -182,6 +184,8 @@ enum dma_ctrl_flags {
DMA_PREP_PQ_DISABLE_Q = (1 << 3),
DMA_PREP_CONTINUE = (1 << 4),
DMA_PREP_FENCE = (1 << 5),
+ DMA_PREP_PQ_MULT = (1 << 10),
+ DMA_PREP_PQ_SUM_PRODUCT = (1 << 11),
};
/**
--
2.4.0
--
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