[v3,15/20] dmaengine: ti: Add support for k3 event routers

Message ID 20201208090440.31792-16-peter.ujfalusi@ti.com
State Accepted
Commit fc373e47d72605cc3f5012ddda49d2dca430d51f
Headers show
  • dmaengine/soc: k3-udma: Add support for BCDMA and PKTDMA
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Commit Message

Peter Ujfalusi Dec. 8, 2020, 9:04 a.m.
In k3 architecture a DMA channel (in TR momde) can be triggered by global
events, origination from different modules.

The events for triggers can be sent from any module which is connected to
PSI-L fabric, but the event number to be sent is DMA channel specific, it
is only known after the channel itself is requested.

The router operation needs to be split up:
- route_allocate: configure the dma_spec for the DMA and store the
  configuration which is needed for the router's input
- set_event: callback used by the DMA driver to set the event number for
  the channel and enable the routing

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

 include/linux/dma/k3-event-router.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 include/linux/dma/k3-event-router.h


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diff --git a/include/linux/dma/k3-event-router.h b/include/linux/dma/k3-event-router.h
new file mode 100644
index 000000000000..e3f88b2f87be
--- /dev/null
+++ b/include/linux/dma/k3-event-router.h
@@ -0,0 +1,16 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+ *  Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com
+ */
+#ifndef K3_EVENT_ROUTER_
+#define K3_EVENT_ROUTER_
+#include <linux/types.h>
+struct k3_event_route_data {
+	void *priv;
+	int (*set_event)(void *priv, u32 event);
+#endif /* K3_EVENT_ROUTER_ */