linux-kernel - Re: [PATCH RESEND v9 0/4] dmaengine: dw-edma: Add support for native HDMA

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Date:   Mon, 8 May 2023 19:27:03 +0800
From:   Cai Huoqing <cai.huoqing@...ux.dev>
To:     vkoul@...nel.org
Cc:     Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Vinod Koul <vkoul@...nel.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH RESEND v9 0/4] dmaengine: dw-edma: Add support for native
 HDMA

On 13 4月 23 11:31:51, Cai Huoqing wrote:
> 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
> youhave 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 aligned to byte.
> 
> Cai Huoqing (1):
>   dmaengine: dw-edma: Add support for native HDMA
> 
> 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 HDMA DebugFS support
> 
> Tested-by: Serge Semin <fancer.lancer@...il.com>
Hi Vinod

Just ping this patch.

I have rebased this patch series, pls try it.

Thanks,
-Cai
> 
> v8->v9:
>   [3/4]
>   1.Drop an empty line.
>   [4/4]
>   2.Update commit log.
>   3.Remove unused macro
> 
> v8 link:
>   https://lore.kernel.org/lkml/20230323034944.78357-1-cai.huoqing@linux.dev/
> 
>  drivers/dma/dw-edma/Makefile                 |   8 +-
>  drivers/dma/dw-edma/dw-edma-core.c           |  86 ++----
>  drivers/dma/dw-edma/dw-edma-core.h           |  58 ++++
>  drivers/dma/dw-edma/dw-edma-pcie.c           |   4 +-
>  drivers/dma/dw-edma/dw-edma-v0-core.c        |  85 +++++-
>  drivers/dma/dw-edma/dw-edma-v0-core.h        |  14 +-
>  drivers/dma/dw-edma/dw-hdma-v0-core.c        | 296 +++++++++++++++++++
>  drivers/dma/dw-edma/dw-hdma-v0-core.h        |  17 ++
>  drivers/dma/dw-edma/dw-hdma-v0-debugfs.c     | 170 +++++++++++
>  drivers/dma/dw-edma/dw-hdma-v0-debugfs.h     |  22 ++
>  drivers/dma/dw-edma/dw-hdma-v0-regs.h        | 129 ++++++++
>  drivers/pci/controller/dwc/pcie-designware.c |   2 +-
>  include/linux/dma/edma.h                     |   7 +-
>  13 files changed, 807 insertions(+), 91 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
> 
> -- 
> 2.34.1
>