Messages in this thread | | | Date | Fri, 18 Feb 2022 13:52:25 +0100 | Subject | Re: [PATCH v5 21/34] iommu/mediatek: Add PCIe support | From | AngeloGioacchino Del Regno <> |
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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 <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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