linux-kernel - Re: [PATCH v7 00/15] dmaengine: dw-edma: HDMA support

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Message-ID: <YFDq41YjkZ9V5Gl3@vkoul-mobl>
Date:   Tue, 16 Mar 2021 22:59:07 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>
Cc:     dmaengine@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Dan Williams <dan.j.williams@...el.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Lukas Wunner <lukas@...ner.de>
Subject: Re: [PATCH v7 00/15] dmaengine: dw-edma: HDMA support

On 18-02-21, 20:03, Gustavo Pimentel wrote:
> This patch series adds the HDMA support, as long the IP design has set
> the compatible register map parameter, which allows compatibility at
> some degree for the existing Synopsys DesignWare eDMA driver that is
> already available on the Kernel.
> 
> The HDMA "Hyper-DMA" IP is an enhancement of the eDMA "embedded-DMA" IP.
> 
> This new improvement comes with a PCI DVSEC that allows to the driver
> recognize and switch behavior if it's an eDMA or an HDMA, becoming
> retrocompatible, in the absence of this DVSEC, the driver will assume
> that is an eDMA IP.
> 
> It also adds the interleaved support, since it will be similar to the
> current scatter-gather implementation.
> 
> As well fixes/improves some abnormal behaviors not detected before, such as:
>  - crash on loading/unloading driver
>  - memory space definition for the data area and for the linked list space
>  - scatter-gather address calculation on 32 bits platforms
>  - minor comment and variable reordering

Applied, thanks

-- 
~Vinod