Il 17/02/22 12:34, Yong Wu ha scritto:
Currently the code for of_iommu_configure_dev_id is like this:static int of_iommu_configure_dev_id(struct device_node *master_np, struct device *dev, const u32 *id) { struct of_phandle_args iommu_spec = { .args_count = 1 }; err = of_map_id(master_np, *id, "iommu-map", "iommu-map-mask", &iommu_spec.np, iommu_spec.args); ... } It supports only one id output. BUT our PCIe HW has two ID(one is for writing, the other is for reading). I'm not sure if we should change of_map_id to support output MAX_PHANDLE_ARGS. Here add the solution in ourselve drivers. If it's pcie case, enable one more bit. Not all infra iommu support PCIe, thus add a PCIe support flag here. Signed-off-by: Yong Wu <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]> _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
