Merge "cnss2: Collect firmware dump after SMMU fault happens" (9b7b1644) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/net/wireless/cnss2/pci.c

+21 −0

Original line number	Diff line number	Diff line
		@@ -1998,6 +1998,25 @@ void cnss_pci_fw_boot_timeout_hdlr(struct cnss_pci_data *pci_priv)
		CNSS_REASON_TIMEOUT);
		}

		static int cnss_pci_smmu_fault_handler(struct iommu_domain *domain,
		struct device *dev, unsigned long iova,
		int flags, void *handler_token)
		{
		struct cnss_pci_data *pci_priv = handler_token;

		cnss_pr_err("SMMU fault happened with IOVA 0x%lx\n", iova);

		if (!pci_priv) {
		cnss_pr_err("pci_priv is NULL\n");
		return -ENODEV;
		}

		cnss_force_fw_assert(&pci_priv->pci_dev->dev);

		/* IOMMU driver requires non-zero return value to print debug info. */
		return -EINVAL;
		}

		static int cnss_pci_init_smmu(struct cnss_pci_data *pci_priv)
		{
		struct pci_dev *pci_dev = pci_priv->pci_dev;
		@@ -2021,6 +2040,8 @@ static int cnss_pci_init_smmu(struct cnss_pci_data *pci_priv)
		if (!ret && !strcmp("fastmap", iommu_dma_type)) {
		cnss_pr_dbg("Enabling SMMU S1 stage\n");
		pci_priv->smmu_s1_enable = true;
		iommu_set_fault_handler(pci_priv->iommu_domain,
		cnss_pci_smmu_fault_handler, pci_priv);
		}

		ret = of_property_read_u32_array(of_node, "qcom,iommu-dma-addr-pool",