linux-kernel - RE: [PATCH v3 1/1] PCI: layerscape-ep: set 64-bit DMA mask

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Message-ID: <VI1PR04MB5967E43A9EF62DCDD939552C8BC2A@VI1PR04MB5967.eurprd04.prod.outlook.com>
Date:   Wed, 27 Sep 2023 13:25:47 +0000
From:   Roy Zang <roy.zang@....com>
To:     Frank Li <frank.li@....com>,
        "hch@...radead.org" <hch@...radead.org>
CC:     "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "christophe.jaillet@...adoo.fr" <christophe.jaillet@...adoo.fr>,
        "imx@...ts.linux.dev" <imx@...ts.linux.dev>,
        "kw@...ux.com" <kw@...ux.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "lpieralisi@...nel.org" <lpieralisi@...nel.org>,
        "M.H. Lian" <minghuan.lian@....com>,
        Mingkai Hu <mingkai.hu@....com>,
        "robh@...nel.org" <robh@...nel.org>
Subject: RE: [PATCH v3 1/1] PCI: layerscape-ep: set 64-bit DMA mask

> -----Original Message-----
> From: Frank Li <frank.li@....com>
> Sent: Tuesday, September 26, 2023 9:05 AM
> From: Guanhua Gao <guanhua.gao@....com>
> 
> Set DMA mask and coherent DMA mask to enable 64-bit addressing.
> 
> Signed-off-by: Guanhua Gao <guanhua.gao@....com>
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
> 
> Notes:
>     change from v2 to v3
>     - remove check return value of dma_set_mask_and_coherent. 64bit mask
> always
>     return success.
>     - remove redundate comments
>     change from v1 to v2
>     - Remove 32bit DMA mask set.
> 
>  drivers/pci/controller/dwc/pci-layerscape-ep.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c
> b/drivers/pci/controller/dwc/pci-layerscape-ep.c
> index de4c1758a6c3..2c2c9aaa8700 100644
> --- a/drivers/pci/controller/dwc/pci-layerscape-ep.c
> +++ b/drivers/pci/controller/dwc/pci-layerscape-ep.c
> @@ -249,6 +249,8 @@ static int __init ls_pcie_ep_probe(struct
> platform_device *pdev)
> 
>  	pcie->big_endian = of_property_read_bool(dev->of_node, "big-
> endian");
> 
> +	dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
> +
Acked-by:  Roy Zang <Roy.Zang@....com>

-R