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

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Date:   Tue, 26 Sep 2023 10:04:45 -0400
From:   Frank Li <Frank.Li@....com>
To:     hch@...radead.org
Cc:     Frank.Li@....com, 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: [PATCH v3 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>
---

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