linux-kernel - Re: [PATCH RESEND 2/2] damengine: dw-edma: Add msi wartermark configuration

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Message-Id: <20240706075931.306-1-zhengdongxiong@gxmicro.cn>
Date: Sat,  6 Jul 2024 15:59:31 +0800
From: dongxiong zheng <zhengdongxiong@...icro.cn>
To: manivannan.sadhasivam@...aro.org
Cc: dmaengine@...r.kernel.org,
	fancer.lancer@...il.com,
	linux-kernel@...r.kernel.org,
	vkoul@...nel.org,
	zhengdongxiong@...icro.cn
Subject: Re: [PATCH RESEND 2/2] damengine: dw-edma: Add msi wartermark configuration

> On Fri, Jul 05, 2024 at 06:57:35PM +0800, zheng.dongxiong wrote:
> > HDMA trigger wartermark interrupt, When use the RIE flag.
> > PCIe RC will trigger AER, If msi wartermark addr is not configuration.
> > This patch fix it by add msi wartermark configuration
> >
> > Signed-off-by: zheng.dongxiong <zheng.dongxiong@...look.com>
>
> HDMA driver is not at all using watermark interrupts. So we should be disabling
> them altogether.
>
> See: https://lore.kernel.org/dmaengine/1720187733-5380-3-git-send-email-quic_msarkar@quicinc.com/
>
> - Mani
>

Hi Mani:

Ok, Thanks you!

> > ---
> >  drivers/dma/dw-edma/dw-hdma-v0-core.c | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/dma/dw-edma/dw-hdma-v0-core.c b/drivers/dma/dw-edma/dw-hdma-v0-core.c
> > index d77051d1e..c4d15a7a7 100644
> > --- a/drivers/dma/dw-edma/dw-hdma-v0-core.c
> > +++ b/drivers/dma/dw-edma/dw-hdma-v0-core.c
> > @@ -280,6 +280,9 @@ static void dw_hdma_v0_core_ch_config(struct dw_edma_chan *chan)
> >  	/* MSI done addr - low, high */
> >  	SET_CH_32(dw, chan->dir, chan->id, msi_stop.lsb, chan->msi.address_lo);
> >  	SET_CH_32(dw, chan->dir, chan->id, msi_stop.msb, chan->msi.address_hi);
> > +	/* MSI watermark addr - low, high */
> > +	SET_CH_32(dw, chan->dir, chan->id, msi_watermark.lsb, chan->msi.address_lo);
> > +	SET_CH_32(dw, chan->dir, chan->id, msi_watermark.msb, chan->msi.address_hi);
> >  	/* MSI abort addr - low, high */
> >  	SET_CH_32(dw, chan->dir, chan->id, msi_abort.lsb, chan->msi.address_lo);
> >  	SET_CH_32(dw, chan->dir, chan->id, msi_abort.msb, chan->msi.address_hi);
> > --
> > 2.34.1
> >
>

Regards,
dongxiong zheng