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

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Message-ID: <20230927124621.GD18050@thinkpad>
Date:   Wed, 27 Sep 2023 14:46:21 +0200
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Frank Li <Frank.Li@....com>
Cc:     hch@...radead.org, bhelgaas@...gle.com,
        christophe.jaillet@...adoo.fr, imx@...ts.linux.dev, kw@...ux.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        lpieralisi@...nel.org, minghuan.Lian@....com, mingkai.hu@....com,
        robh@...nel.org, roy.zang@....com
Subject: Re: [PATCH v3 1/1] PCI: layerscape-ep: set 64-bit DMA mask

On Tue, Sep 26, 2023 at 10:04:45AM -0400, Frank Li wrote:
> 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>

Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

- Mani

> ---
> 
> 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));
> +
>  	platform_set_drvdata(pdev, pcie);
>  
>  	ret = dw_pcie_ep_init(&pci->ep);
> -- 
> 2.34.1
> 

-- 
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