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pci: layerscape: move per-pci device fdt fixup in a function

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Move the pci device related fdt fixup in a function in order to
re-use it in a following patch. While at it, improve the error
handling.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
[Rebased]
Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
This commit is contained in:
Laurentiu Tudor 2020-10-23 13:35:27 +05:30 committed by Priyanka Jain
parent 2a70e4bec3
commit 1f46e6790a
1 changed files with 34 additions and 26 deletions
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60
drivers/pci/pcie_layerscape_fixup.c
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@ -174,12 +174,41 @@ static void fdt_pcie_set_iommu_map_entry_ls(void *blob,
}
}
static int fdt_fixup_pcie_device_ls(void *blob, pci_dev_t bdf,
struct ls_pcie_rc *pcie_rc)
{
int streamid, index;
streamid = pcie_next_streamid(pcie_rc->stream_id_cur,
pcie_rc->pcie->idx);
if (streamid < 0) {
printf("ERROR: out of stream ids for BDF %d.%d.%d\n",
PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
return -ENOENT;
}
pcie_rc->stream_id_cur++;
index = ls_pcie_next_lut_index(pcie_rc);
if (index < 0) {
printf("ERROR: out of LUT indexes for BDF %d.%d.%d\n",
PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
return -ENOENT;
}
/* map PCI b.d.f to streamID in LUT */
ls_pcie_lut_set_mapping(pcie_rc, index, bdf >> 8, streamid);
/* update msi-map in device tree */
fdt_pcie_set_msi_map_entry_ls(blob, pcie_rc, bdf >> 8, streamid);
/* update iommu-map in device tree */
fdt_pcie_set_iommu_map_entry_ls(blob, pcie_rc, bdf >> 8, streamid);
return 0;
}
static void fdt_fixup_pcie_ls(void *blob)
{
struct udevice *dev, *bus;
struct ls_pcie_rc *pcie_rc;
int streamid;
int index;
pci_dev_t bdf;
/* Scan all known buses */
@ -196,32 +225,11 @@ static void fdt_fixup_pcie_ls(void *blob)
pcie_rc = dev_get_priv(bus);
streamid = pcie_next_streamid(pcie_rc->stream_id_cur,
pcie_rc->pcie->idx);
if (streamid < 0) {
debug("ERROR: no stream ids free\n");
continue;
} else {
pcie_rc->stream_id_cur++;
}
index = ls_pcie_next_lut_index(pcie_rc);
if (index < 0) {
debug("ERROR: no LUT indexes free\n");
continue;
}
/* the DT fixup must be relative to the hose first_busno */
bdf = dm_pci_get_bdf(dev) - PCI_BDF(bus->seq, 0, 0);
/* map PCI b.d.f to streamID in LUT */
ls_pcie_lut_set_mapping(pcie_rc, index, bdf >> 8,
streamid);
/* update msi-map in device tree */
fdt_pcie_set_msi_map_entry_ls(blob, pcie_rc, bdf >> 8,
streamid);
/* update iommu-map in device tree */
fdt_pcie_set_iommu_map_entry_ls(blob, pcie_rc, bdf >> 8,
streamid);
if (fdt_fixup_pcie_device_ls(blob, bdf, pcie_rc) < 0)
break;
}
pcie_board_fix_fdt(blob);
}