Adding a callback function that provides a way to report
transation error and residue DMA data.
Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
---
include/linux/dmaengine.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 30de019..abb8440 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -440,6 +440,7 @@ void dma_chan_cleanup(struct kref *kref);
typedef bool (*dma_filter_fn)(struct dma_chan *chan, void *filter_param);
typedef void (*dma_async_tx_callback)(void *dma_async_param);
+typedef struct dma_results * (*dma_async_tx_with_err_callback)(void *dma_async_param);
struct dmaengine_unmap_data {
u8 map_cnt;
@@ -452,6 +453,18 @@ struct dmaengine_unmap_data {
dma_addr_t addr[0];
};
+enum dma_trans_error {
+ DMA_TRANS_NOERROR = 0,
+ DMA_TRANS_READ_FAILED,
+ DMA_TRANS_WRITE_FAILED,
+ DMA_TRANS_ABORTED,
+};
+
+struct dma_results {
+ enum dma_trans_error result;
+ u32 residue;
+};
+
/**
* struct dma_async_tx_descriptor - async transaction descriptor
* ---dma generic offload fields---
@@ -478,6 +491,7 @@ struct dma_async_tx_descriptor {
dma_cookie_t (*tx_submit)(struct dma_async_tx_descriptor *tx);
int (*desc_free)(struct dma_async_tx_descriptor *tx);
dma_async_tx_callback callback;
+ dma_async_tx_with_err_callback callback_result;
void *callback_param;
struct dmaengine_unmap_data *unmap;
#ifdef CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH
--
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