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The unrolled version of the internal ATU has been available since the DWC PCIe v4.80a IP core, but it may not be enabled. Per [1], if unrolled ATU is enabled, the PCIE_ATU_VIEWPORT does not exist and reads as 0xffffffff; while if unrolled ATU is disabled, PCIE_ATU_VIEWPORT will contain some zeros. Simplify dw_pcie_iatu_unroll_enabled() by checking the value of PCIE_ATU_VIEWPORT. [1] DesignWare Cores, PCI Express Controller, Register Desciptions, v.4.90a, December 2016, p.855 [bhelgaas: commit log] Link: https://lore.kernel.org/r/20220624143428.8334-10-Sergey.Semin@baikalelectronics.ru Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| pci-dra7xx.c | ||
| pci-exynos.c | ||
| pci-imx6.c | ||
| pci-keystone.c | ||
| pci-layerscape-ep.c | ||
| pci-layerscape.c | ||
| pci-meson.c | ||
| pcie-al.c | ||
| pcie-armada8k.c | ||
| pcie-artpec6.c | ||
| pcie-designware-ep.c | ||
| pcie-designware-host.c | ||
| pcie-designware-plat.c | ||
| pcie-designware.c | ||
| pcie-designware.h | ||
| pcie-dw-rockchip.c | ||
| pcie-fu740.c | ||
| pcie-hisi.c | ||
| pcie-histb.c | ||
| pcie-intel-gw.c | ||
| pcie-keembay.c | ||
| pcie-kirin.c | ||
| pcie-qcom-ep.c | ||
| pcie-qcom.c | ||
| pcie-spear13xx.c | ||
| pcie-tegra194-acpi.c | ||
| pcie-tegra194.c | ||
| pcie-uniphier-ep.c | ||
| pcie-uniphier.c | ||
| pcie-visconti.c | ||