ALSA: core: Expand DMA buffer information

Update DMA buffer definition for snd_compr_runtime so it is represented
similarly as in snd_pcm_runtime. While at it, modify
snd_compr_set_runtime_buffer to account for newly added members.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Vinod Koul <vkoul@kernel.org>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200218143924.10565-2-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/include/sound/compress_driver.h b/include/sound/compress_driver.h
index bc88d6f..00f633c 100644 (file)
--- 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;
 };
 
 /**
@@ -180,19 +187,29 @@ 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_stop_error(struct snd_compr_stream *stream,