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.bhus...@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
--
1.9.3
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