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

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Message-ID: <20230411165342.u6k6vamyejuqqb5z@mobilestation>
Date:   Tue, 11 Apr 2023 19:53:42 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     Cai Huoqing <cai.huoqing@...ux.dev>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        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 v9 0/4] dmaengine: dw-edma: Add support for native HDMA

On Fri, Mar 24, 2023 at 10:44:58AM +0300, Serge Semin wrote:
> Hi Vinod
> 
> On Fri, Mar 24, 2023 at 10:14:14AM +0800, 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>
> 
> I finished the patchset review and testing. Could you have a look at
> the series. If you are ok with what it does please merge in.

@Vinod, merge window will supposedly be in the next week. Could you
give your resolution about this series?

-Serge(y)

> 
> -Serge(y)
> 
> > 
> > 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
> >