[PATCH 0/3] dmaengine: dw-edma: Add support for native HDMA

Cai Huoqing
2022-09-21T06:49:27Z

From: caihuoqing <caihuoqing@baidu.com>

Add support for HDMA NATIVE, as long the IP design has set
the compatible register map parameter-HDMA_NATIVE,
which allows compatibility for native HDMA register configuration.

The HDMA Hyper-DMA IP is an enhancement of the eDMA embedded-DMA IP.
And the native HDMA registers are different from eDMA,
so this patch add support for HDMA NATIVE mode.

HDMA write and read channels operate independently to maximize
the performance of the HDMA read and write data transfer over
the link When you configure the HDMA with multiple read channels,
then it uses a round robin (RR) arbitration scheme to select
the next read channel to be serviced.
The same applies when you have multiple write channels.

The native HDMA driver also supports a maximum of 16 independent
channels (8 write + 8 read), which can run simultaneously.
Both SAR (Source Address Register) and DAR (Destination Address Register)
are alignmented to byte.dmaengine: dw-edma: Add support for native HDMA

These series based on the series
https://lore.kernel.org/dmaengine/20220822185332.26149-1-Sergey.Semin@baikalelectronics.ru/

Cai Huoqing (3):
dmaengine: dw-edma: Rename dw_edma_core_ops structure to
dw_edma_plat_ops
dmaengine: dw-edma: Create a new dw_edma_core_ops structure to
abstract controller operation
dmaengine: dw-edma: Add support for native HDMA

drivers/dma/dw-edma/Makefile | 6 +-
drivers/dma/dw-edma/dw-edma-core.c | 65 ++---
drivers/dma/dw-edma/dw-edma-core.h | 19 ++
drivers/dma/dw-edma/dw-edma-pcie.c | 4 +-
drivers/dma/dw-edma/dw-edma-v0-core.c | 90 ++++++-
drivers/dma/dw-edma/dw-edma-v0-core.h | 14 +-
drivers/dma/dw-edma/dw-hdma-v0-core.c | 304 +++++++++++++++++++++++
drivers/dma/dw-edma/dw-hdma-v0-core.h | 17 ++
drivers/dma/dw-edma/dw-hdma-v0-debugfs.c | 150 +++++++++++
drivers/dma/dw-edma/dw-hdma-v0-debugfs.h | 22 ++
drivers/dma/dw-edma/dw-hdma-v0-regs.h | 98 ++++++++
include/linux/dma/edma.h | 7 +-
12 files changed, 725 insertions(+), 71 deletions(-)
create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-core.c
create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-core.h
create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-debugfs.c
create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-debugfs.h
create mode 100644 drivers/dma/dw-edma/dw-hdma-v0-regs.h

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2.25.1