linux-kernel - Re: [PATCH v4 0/4] dmaengine: dw-edma: Add support for native HDMA

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Date:   Wed, 1 Mar 2023 10:22:53 +0800
From:   Cai Huoqing <cai.huoqing@...ux.dev>
To:     fancer.lancer@...il.com
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 v4 0/4] dmaengine: dw-edma: Add support for native HDMA

On 21 2月 23 11:46:51, 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.
Just ping this patch v4

Thanks,
Cai-
> 
> Cai huoqing (4):
>   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
>   dmaengine: dw-edma: Add HDMA DebugFS support
> 
>   v3->v4:
>     [1/4]
>     1.Update the structure name dw_edma_plat_ops in commit log
>     2.Fix code stytle.
>     [2/4]
>     3.Refactor dw_edma_interrupt() and related callbacks to
>       make the code more readable, the calls hierarchy like this:
> 
>       irq: dw_edma_interrupt_{write,read}()
>       +-> dw_edma_core_handle_int() (dw-edma-v0-core.c)
>           +-> dw_edma_v0_core_status_done_int() (dw-edma-v0-core.c)
>           +-> dw_edma_v0_core_clear_done_int() (dw-edma-v0-core.c)
>           +-> dw_edma_done_interrupt() (dw-edma-core.c)
>           +-> dw_edma_v0_core_status_abort_int() (dw-edma-v0-core.c)
>           +-> dw_edma_v0_core_clear_abort_int() (dw-edma-v0-core.c)
>           +-> dw_edma_abort_interrupt() (dw-edma-core.c)
>     4.Use the dw_edma_v0_core name for the dw_edma_core_ops structure instance.
>     [3/4]
>     5.Fix weird indentation of control1, func_num, etc.
>     6.Include 'linux/io-64-nonatomic-lo-hi.h' to fix warning.
>     7.Refactor dw_edma_core_handle_int related callback in dw_hdma_v0_core ops.
>     [4/4]
>     8.Add field watermark_en, func_num, qos, msi_watermark,etc.
>     9.Make variables reverse xmas tree order.
>     10.Declare const for 'struct dw_hdma_debugfs_entry'
> 
>   v3 link:
>   https://lore.kernel.org/lkml/20230213132411.65524-1-cai.huoqing@linux.dev/
> 
>  drivers/dma/dw-edma/Makefile                 |   8 +-
>  drivers/dma/dw-edma/dw-edma-core.c           |  77 ++---
>  drivers/dma/dw-edma/dw-edma-core.h           |  56 ++++
>  drivers/dma/dw-edma/dw-edma-pcie.c           |   4 +-
>  drivers/dma/dw-edma/dw-edma-v0-core.c        |  73 ++++-
>  drivers/dma/dw-edma/dw-edma-v0-core.h        |  14 +-
>  drivers/dma/dw-edma/dw-hdma-v0-core.c        | 302 +++++++++++++++++++
>  drivers/dma/dw-edma/dw-hdma-v0-core.h        |  17 ++
>  drivers/dma/dw-edma/dw-hdma-v0-debugfs.c     | 181 +++++++++++
>  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(+), 85 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
>