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[v8,02/11] PCI: imx6: Fix i.MX8MP PCIe EP's occasional failure to trigger MSI

Message ID 20240729-pci2_upstream-v8-2-b68ee5ef2b4d@nxp.com (mailing list archive)
State Not Applicable
Headers show
Series PCI: imx6: Fix\rename\clean up and add lut information for imx95 | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Frank Li July 29, 2024, 8:18 p.m. UTC 
From: Richard Zhu <hongxing.zhu@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@nxp.com>
Acked-by: Jason Liu <jason.hui.liu@nxp.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/pci/controller/dwc/pci-imx6.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 42fd17fbadfa5..3b739aa7c5166 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -1113,6 +1113,8 @@  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");