This patch adds support for new feature CRC32C calculation in
dmaengine framework.
Signed-of-by: Rameshwar Prasad Sahu<rs...@apm.com>
---
drivers/dma/dmaengine.c | 2 ++
include/linux/dmaengine.h | 5 +++++
2 files changed, 7 insertions(+)
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 4a4cce1..55ba799 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -853,6 +853,8 @@ int dma_async_device_register(struct dma_device *device)
!device->device_prep_dma_cyclic);
BUG_ON(dma_has_cap(DMA_INTERLEAVE, device->cap_mask) &&
!device->device_prep_interleaved_dma);
+ BUG_ON(dma_has_cap(DMA_CRC32C, device->cap_mask) &&
+ !device->device_prep_dma_crc32c);
BUG_ON(!device->device_tx_status);
BUG_ON(!device->device_issue_pending);
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index e2f5eb4..9da70b6 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -73,6 +73,7 @@ enum dma_transaction_type {
DMA_SLAVE,
DMA_CYCLIC,
DMA_INTERLEAVE,
+ DMA_CRC32C,
/* last transaction type for creation of the capabilities mask */
DMA_TX_TYPE_END,
};
@@ -622,6 +623,7 @@ struct dma_tx_state {
* The function takes a buffer of size buf_len. The callback function will
* be called after period_len bytes have been transferred.
* @device_prep_interleaved_dma: Transfer expression in a generic way.
+ * @device_prep_dma_crc32c: prepares a crc32c operation
* @device_config: Pushes a new configuration to a channel, return 0 or an
error
* code
* @device_pause: Pauses any transfer happening on a channel. Returns
@@ -701,6 +703,9 @@ struct dma_device {
struct dma_async_tx_descriptor *(*device_prep_interleaved_dma)(
struct dma_chan *chan, struct dma_interleaved_template *xt,
unsigned long flags);
+ struct dma_async_tx_descriptor *(*device_prep_dma_crc32c)(
+ struct dma_chan *chan, struct scatterlist *src_sg, size_t len,
+ unsigned int seed, u8 *result, unsigned long flags);
int (*device_config)(struct dma_chan *chan,
struct dma_slave_config *config);
--
1.8.2.1
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