leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

pcie-layerscape: Fixup iommu-map property of pci node

Browse Source 
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>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Bharat Bhushan 2017-03-22 12:12:33 +05:30 committed by York Sun
parent 47d1736231
commit 78be6222b0
1 changed files with 55 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
drivers/pci/pcie_layerscape_fixup.c
View File

@ -110,6 +110,58 @@ 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;
@ -146,6 +198,9 @@ 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