Adding dmaengine core helper function in order to prep for error
reporting.
Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
---
drivers/dma/dmaengine.h | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/dma/dmaengine.h b/drivers/dma/dmaengine.h
index 17f983a..6fb5edc 100644
--- a/drivers/dma/dmaengine.h
+++ b/drivers/dma/dmaengine.h
@@ -86,4 +86,34 @@ static inline void dma_set_residue(struct dma_tx_state *state, u32 residue)
state->residue = residue;
}
+struct dmaengine_desc_callback {
+ dma_async_tx_callback callback;
+ void *callback_param;
+};
+
+static inline void
+dmaengine_desc_get_callback(struct dma_async_tx_descriptor *tx,
+ struct dmaengine_desc_callback *cb)
+{
+ cb->callback = tx->callback;
+ cb->callback_param = tx->callback_param;
+}
+
+static inline void
+dmaengine_desc_callback_invoke(struct dmaengine_desc_callback *cb,
+ const void *result)
+{
+ if (cb->callback)
+ cb->callback(cb->callback_param);
+}
+
+static inline void
+dmaengine_desc_get_callback_invoke(struct dma_async_tx_descriptor *tx,
+ struct dmaengine_desc_callback *cb,
+ const void *result)
+{
+ dmaengine_desc_get_callback(tx, cb);
+ dmaengine_desc_callback_invoke(cb, result);
+}
+
#endif
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