From: Stuart Yoder stuart.yoder@nxp.com
for all PCI devices discovered in a system: -allocate a LUT (look-up-table) entry in that PCI controller -allocate a stream ID for the device -program and enable a LUT entry (maps PCI requester id to stream ID) -set the msi-map property on the controller reflecting the LUT mapping
basic bus scanning loop/logic was taken from drivers/pci/pci.c pci_hose_scan_bus().
Signed-off-by: Stuart Yoder stuart.yoder@nxp.com --- drivers/pci/pcie_layerscape.c | 68 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+)
diff --git a/drivers/pci/pcie_layerscape.c b/drivers/pci/pcie_layerscape.c index dfafaf2..eaac9e1 100644 --- a/drivers/pci/pcie_layerscape.c +++ b/drivers/pci/pcie_layerscape.c @@ -569,6 +569,70 @@ static void fdt_pcie_set_msi_map_entry(void *blob, struct ls_pcie *pcie, fdt_appendprop_u32(blob, nodeoffset, "msi-map", 1); }
+static void fdt_fixup_pcie(void *blob) +{ + unsigned int found_multi = 0; + unsigned char header_type; + int index; + u32 streamid; + pci_dev_t dev; + int bus; + unsigned short id; + struct pci_controller *hose; + struct ls_pcie *pcie; + int i; + + for (i = 0, hose = pci_get_hose_head(); hose; hose = hose->next, i++) { + pcie = hose->priv_data; + for (bus = hose->first_busno; bus <= hose->last_busno; bus++) { + + for (dev = PCI_BDF(bus, 0, 0); + dev < PCI_BDF(bus, PCI_MAX_PCI_DEVICES - 1, + PCI_MAX_PCI_FUNCTIONS - 1); + dev += PCI_BDF(0, 0, 1)) { + + /* skip the host bridge */ + if (dev == PCI_BDF(0, 0, 0)) + continue; + + if (PCI_FUNC(dev) && !found_multi) + continue; + + pci_read_config_word(dev, PCI_VENDOR_ID, &id); + + pci_read_config_byte(dev, PCI_HEADER_TYPE, + &header_type); + + if ((id == 0xFFFF) || (id == 0x0000)) + continue; + + if (!PCI_FUNC(dev)) + found_multi = header_type & 0x80; + + streamid = ls_pcie_next_streamid(); + if (streamid < 0) { + printf("ERROR: no stream ids free\n"); + continue; + } + + index = ls_pcie_next_lut_index(pcie); + if (index < 0) { + printf("ERROR: no LUT indexes free\n"); + continue; + } + + /* map PCI b.d.f to streamID in LUT */ + ls_pcie_lut_set_mapping(pcie, index, dev >> 8, + streamid); + + /* update msi-map in device tree */ + fdt_pcie_set_msi_map_entry(blob, pcie, dev >> 8, + streamid); + } + } + } +} + int ls_pcie_init_ctrl(int busno, enum srds_prtcl dev, struct ls_pcie_info *info) { struct ls_pcie *pcie; @@ -745,6 +809,10 @@ void ft_pci_setup(void *blob, bd_t *bd) #ifdef CONFIG_PCIE4 ft_pcie_ls_setup(blob, FSL_PCIE_COMPAT, CONFIG_SYS_PCIE4_ADDR, PCIE4); #endif + + #if defined(CONFIG_LS2080A) || defined(CONFIG_LS2085A) + fdt_fixup_pcie(blob); + #endif }
#else