1 files changed, 31 insertions, 9 deletions

diff --git a/include/sound/compress_driver.h b/include/sound/compress_driver.h
index bc88d6f964da..6ce8effa0b12 100644
--- a/include/sound/compress_driver.h
+++ b/include/sound/compress_driver.h
@@ -23,7 +23,6 @@ struct snd_compr_ops;
  * struct snd_compr_runtime: runtime stream description
  * @state: stream state
  * @ops: pointer to DSP callbacks
- * @dma_buffer_p: runtime dma buffer pointer
  * @buffer: pointer to kernel buffer, valid only when not in mmap mode or
  *	DSP doesn't implement copy
  * @buffer_size: size of the above buffer
@@ -34,11 +33,14 @@ struct snd_compr_ops;
  * @total_bytes_transferred: cumulative bytes transferred by offload DSP
  * @sleep: poll sleep
  * @private_data: driver private data pointer
+ * @dma_area: virtual buffer address
+ * @dma_addr: physical buffer address (not accessible from main CPU)
+ * @dma_bytes: size of DMA area
+ * @dma_buffer_p: runtime dma buffer pointer
  */
 struct snd_compr_runtime {
 	snd_pcm_state_t state;
 	struct snd_compr_ops *ops;
-	struct snd_dma_buffer *dma_buffer_p;
 	void *buffer;
 	u64 buffer_size;
 	u32 fragment_size;
@@ -47,6 +49,11 @@ struct snd_compr_runtime {
 	u64 total_bytes_transferred;
 	wait_queue_head_t sleep;
 	void *private_data;
+
+	unsigned char *dma_area;
+	dma_addr_t dma_addr;
+	size_t dma_bytes;
+	struct snd_dma_buffer *dma_buffer_p;
 };
 
 /**
@@ -60,6 +67,7 @@ struct snd_compr_runtime {
  * @metadata_set: metadata set flag, true when set
  * @next_track: has userspace signal next track transition, true when set
  * @private_data: pointer to DSP private data
+ * @dma_buffer: allocated buffer if any
  */
 struct snd_compr_stream {
 	const char *name;
@@ -71,6 +79,7 @@ struct snd_compr_stream {
 	bool metadata_set;
 	bool next_track;
 	void *private_data;
+	struct snd_dma_buffer dma_buffer;
 };
 
 /**
@@ -180,21 +189,34 @@ static inline void snd_compr_drain_notify(struct snd_compr_stream *stream)
 
 /**
  * snd_compr_set_runtime_buffer - Set the Compress runtime buffer
- * @substream: compress substream to set
+ * @stream: compress stream to set
  * @bufp: the buffer information, NULL to clear
  *
  * Copy the buffer information to runtime buffer when @bufp is non-NULL.
  * Otherwise it clears the current buffer information.
  */
-static inline void snd_compr_set_runtime_buffer(
-					struct snd_compr_stream *substream,
-					struct snd_dma_buffer *bufp)
+static inline void
+snd_compr_set_runtime_buffer(struct snd_compr_stream *stream,
+			     struct snd_dma_buffer *bufp)
 {
-	struct snd_compr_runtime *runtime = substream->runtime;
-
-	runtime->dma_buffer_p = bufp;
+	struct snd_compr_runtime *runtime = stream->runtime;
+
+	if (bufp) {
+		runtime->dma_buffer_p = bufp;
+		runtime->dma_area = bufp->area;
+		runtime->dma_addr = bufp->addr;
+		runtime->dma_bytes = bufp->bytes;
+	} else {
+		runtime->dma_buffer_p = NULL;
+		runtime->dma_area = NULL;
+		runtime->dma_addr = 0;
+		runtime->dma_bytes = 0;
+	}
 }
 
+int snd_compr_malloc_pages(struct snd_compr_stream *stream, size_t size);
+int snd_compr_free_pages(struct snd_compr_stream *stream);
+
 int snd_compr_stop_error(struct snd_compr_stream *stream,
 			 snd_pcm_state_t state);