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[v2,2/3] dmaengine: Add support for immediate commands in the client API

Message ID 20221027051429.46593-3-sireeshkodali1@gmail.com (mailing list archive)
State Changes Requested
Headers show
Series dmaengine: Add support for immediate commands | expand

Commit Message

Sireesh Kodali Oct. 27, 2022, 5:14 a.m. UTC 
Immediate commands are needed by the IPA network driver, so that it can
send commands via BAM to the IPA microcontroller.

Signed-off-by: Sireesh Kodali <sireeshkodali1@gmail.com>
---
 include/linux/dmaengine.h | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index c923f4e60f24..8da96bb50a63 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -190,6 +190,9 @@  struct dma_interleaved_template {
  *  transaction is marked with DMA_PREP_REPEAT will cause the new transaction
  *  to never be processed and stay in the issued queue forever. The flag is
  *  ignored if the previous transaction is not a repeated transaction.
+ *  @DMA_PREP_IMM_CMD: tell the driver that the data passed to the DMA API is
+ *  immediate command data and the descriptor should be in a different format
+ *  from the normal data and descriptor
  */
 enum dma_ctrl_flags {
 	DMA_PREP_INTERRUPT = (1 << 0),
@@ -202,6 +205,7 @@  enum dma_ctrl_flags {
 	DMA_PREP_CMD = (1 << 7),
 	DMA_PREP_REPEAT = (1 << 8),
 	DMA_PREP_LOAD_EOT = (1 << 9),
+	DMA_PREP_IMM_CMD = (1 << 10),
 };
 
 /**