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

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Message-Id: <20230921153702.3281289-1-Frank.Li@nxp.com>
Date:   Thu, 21 Sep 2023 11:37:02 -0400
From:   Frank Li <Frank.Li@....com>
To:     Minghuan Lian <minghuan.Lian@....com>,
        Mingkai Hu <mingkai.hu@....com>, Roy Zang <roy.zang@....com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linuxppc-dev@...ts.ozlabs.org (open list:PCI DRIVER FOR FREESCALE
        LAYERSCAPE),
        linux-pci@...r.kernel.org (open list:PCI DRIVER FOR FREESCALE
        LAYERSCAPE),
        linux-arm-kernel@...ts.infradead.org (moderated list:PCI DRIVER FOR
        FREESCALE LAYERSCAPE), linux-kernel@...r.kernel.org (open list)
Cc:     imx@...ts.linux.dev
Subject: [PATCH 1/1] PCI: layerscape-ep: set 64-bit DMA mask

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>
---
 drivers/pci/controller/dwc/pci-layerscape-ep.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c b/drivers/pci/controller/dwc/pci-layerscape-ep.c
index de4c1758a6c33..6fd0dea38a32c 100644
--- a/drivers/pci/controller/dwc/pci-layerscape-ep.c
+++ b/drivers/pci/controller/dwc/pci-layerscape-ep.c
@@ -249,6 +249,11 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
 
 	pcie->big_endian = of_property_read_bool(dev->of_node, "big-endian");
 
+	/* set 64-bit DMA mask and coherent DMA mask */
+	if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
+		if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)))
+			return -EIO;
+
 	platform_set_drvdata(pdev, pcie);
 
 	ret = dw_pcie_ep_init(&pci->ep);
-- 
2.34.1