dmaengine: ti: k3-udma: Initial support for K3 PKTDMA

Browse source

One of the DMAs introduced with AM64 is the Packet DMA (PKTDMA).
It serves similar purpose as K3 UDMAP channels in packet mode, but with
notable differences, like tflow support and channels being allocated to
service specific peripherals.
The rings for the PKTDMA is integrated within the DMA itself instead of
using rings from the general purpose ringacc.

PKTDMA can be used to service PSI-L peripherals, similarly to
K3 UDMA channels.

Most of the driver code can be reused for PKTDMA tchan/rchan support but
new setup and allocation functions are needed to handle the differences
between the DMAs.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20201208090440.31792-20-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

...

This commit is contained in:

Peter Ujfalusi 2020-12-08 11:04:39 +02:00 • committed by Vinod Koul

parent 8844898028

commit d2abc98233

3 changed files with 533 additions and 25 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

9

drivers/dma/ti/k3-udma-private.c

View file

545

drivers/dma/ti/k3-udma.c

View file

4

drivers/dma/ti/k3-udma.h

View file