[PATCH v7 02/10] PCI: imx6: Fix i.MX8MP PCIe EP's occasional failure to trigger MSI

[Manivannan Sadhasivam]

On Mon, Jul 08, 2024 at 01:08:06PM -0400, Frank Li wrote:
> From: Richard Zhu <hongxing.zhu at nxp.com>
> 
> Correct occasional MSI triggering failures in i.MX8MP PCIe EP by applying
> the correct hardware outbound alignment requirement.
> 
> The i.MX platform has a restriction about outbound address translation. The
> pci-epc-mem uses page_size to manage it. Set the correct page_size for i.MX
> platform to meet the hardware requirement, which is the same as inbound
> address alignment. Align it with epc_features::align.
> 
> Fixes: 1bd0d43dcf3b ("PCI: imx6: Clean up addr_space retrieval code")
> Signed-off-by: Richard Zhu <hongxing.zhu at nxp.com>
> Acked-by: Jason Liu <jason.hui.liu at nxp.com>
> Signed-off-by: Frank Li <Frank.Li at nxp.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>

- Mani

> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 9a71b8aa09b3c..ca9a000c9a96d 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -1118,6 +1118,8 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_pcie,
>  	if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_SUPPORT_64BIT))
>  		dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
>  
> +	ep->page_size = imx6_pcie->drvdata->epc_features->align;
> +
>  	ret = dw_pcie_ep_init(ep);
>  	if (ret) {
>  		dev_err(dev, "failed to initialize endpoint\n");
> 
> -- 
> 2.34.1
> 

-- 
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