This patch fixup iommu-map property on pci node to have a valid mapping of requester-id to stream-id. The requester-id to stream-id mapping is based on PCI-LUT table initialization.
Signed-off-by: Bharat Bhushan Bharat.Bhushan@nxp.com --- v1->v2 - Typo error in comment about phandle of MSI node rather than iommu
drivers/pci/pcie_layerscape_fixup.c | 53 +++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+)
diff --git a/drivers/pci/pcie_layerscape_fixup.c b/drivers/pci/pcie_layerscape_fixup.c index 8f8f6b6..3aea587 100644 --- a/drivers/pci/pcie_layerscape_fixup.c +++ b/drivers/pci/pcie_layerscape_fixup.c @@ -103,6 +103,56 @@ static void fdt_pcie_set_msi_map_entry(void *blob, struct ls_pcie *pcie, fdt_appendprop_u32(blob, nodeoffset, "msi-map", 1); }
+/* + * An iommu-map is a property to be added to the pci controller + * node. It is a table, where each entry consists of 4 fields + * e.g.: + * + * iommu-map = <[devid] [phandle-to-iommu-ctrl] [stream-id] [count] + * [devid] [phandle-to-iommu-ctrl] [stream-id] [count]>; + */ +static void fdt_pcie_set_iommu_map_entry(void *blob, struct ls_pcie *pcie, + u32 devid, u32 streamid) +{ + u32 *prop; + u32 iommu_map[4]; + int nodeoffset; + int lenp; + + /* find pci controller node */ + nodeoffset = fdt_node_offset_by_compat_reg(blob, "fsl,ls-pcie", + pcie->dbi_res.start); + if (nodeoffset < 0) { +#ifdef CONFIG_FSL_PCIE_COMPAT /* Compatible with older version of dts node */ + nodeoffset = fdt_node_offset_by_compat_reg(blob, + CONFIG_FSL_PCIE_COMPAT, pcie->dbi_res.start); + if (nodeoffset < 0) + return; +#else + return; +#endif + } + + /* get phandle to iommu controller */ + prop = fdt_getprop_w(blob, nodeoffset, "iommu-map", &lenp); + if (prop == NULL) { + debug("\n%s: ERROR: missing iommu-map: PCIe%d\n", + __func__, pcie->idx); + return; + } + + /* set iommu-map row */ + iommu_map[0] = cpu_to_fdt32(devid); + iommu_map[1] = *++prop; + iommu_map[2] = cpu_to_fdt32(streamid); + iommu_map[3] = cpu_to_fdt32(1); + + if (devid == 0) + fdt_setprop_inplace(blob, nodeoffset, "iommu-map", iommu_map, 16); + else + fdt_appendprop(blob, nodeoffset, "iommu-map", iommu_map, 16); +} + static void fdt_fixup_pcie(void *blob) { struct udevice *dev, *bus; @@ -139,6 +189,9 @@ static void fdt_fixup_pcie(void *blob) /* update msi-map in device tree */ fdt_pcie_set_msi_map_entry(blob, pcie, bdf >> 8, streamid); + /* update iommu-map in device tree */ + fdt_pcie_set_iommu_map_entry(blob, pcie, bdf >> 8, + streamid); } } #endif