linux-kernel - Re: [RESEND PATCH V1 XDMA 0/1] xilinx XDMA driver

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Message-ID: <3fad221a-69f6-f30f-36f4-f4f54653a5d4@amd.com>
Date:   Tue, 23 Aug 2022 21:42:10 -0700
From:   Lizhi Hou <lizhi.hou@....com>
To:     <vkoul@...nel.org>, <dmaengine@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <max.zhen@....com>, <sonal.santan@....com>, <larry.liu@....com>,
        <brian.xu@....com>, <trix@...hat.com>
Subject: Re: [RESEND PATCH V1 XDMA 0/1] xilinx XDMA driver

Hi Vinod,


Just a kind reminder and we are looking forward your review and comment.


Thanks,

Lizhi

On 8/10/22 15:45, Lizhi Hou wrote:
> Hello,
>
> This V1 of patch series is to provide the platform driver to support the
> Xilinx XDMA subsystem. The XDMA subsystem is used in conjunction with the
> PCI Express IP block to provide high performance data transfer between host
> memory and the card's DMA subsystem. It also provides up to 16 user
> interrupt wires to user logic that generate interrupts to the host.
>
>              +-------+       +-------+       +-----------+
>     PCIe     |       |       |       |       |           |
>     Tx/Rx    |       |       |       |  AXI  |           |
>   <=======>  | PCIE  | <===> | XDMA  | <====>| User Logic|
>              |       |       |       |       |           |
>              +-------+       +-------+       +-----------+
>
> The XDMA has been used for Xilinx Alveo PCIe devices.
> And it is also integrated into Versal ACAP DMA and Bridge Subsystem.
>      https://www.xilinx.com/products/boards-and-kits/alveo.html
>      https://docs.xilinx.com/r/en-US/pg344-pcie-dma-versal/Introduction-to-the-DMA-and-Bridge-Subsystems
>
> The device driver for any FPGA based PCIe device which leverages XDMA can
> call the standard dmaengine APIs to discover and use the XDMA subsystem
> without duplicating the XDMA driver code in its own driver.
>
> Lizhi Hou (1):
>    dmaengine: xilinx: xdma: add xilinx xdma driver
>
>   MAINTAINERS                            |  10 +
>   drivers/dma/Kconfig                    |  13 +
>   drivers/dma/xilinx/Makefile            |   1 +
>   drivers/dma/xilinx/xdma-regs.h         | 179 +++++
>   drivers/dma/xilinx/xdma.c              | 952 +++++++++++++++++++++++++
>   include/linux/platform_data/amd_xdma.h |  34 +
>   6 files changed, 1189 insertions(+)
>   create mode 100644 drivers/dma/xilinx/xdma-regs.h
>   create mode 100644 drivers/dma/xilinx/xdma.c
>   create mode 100644 include/linux/platform_data/amd_xdma.h
>