| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2005 Linux Networx |
| * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/pciexp.h> |
| |
| static void pciexp_tune_dev(device_t dev) |
| { |
| unsigned cap; |
| |
| cap = pci_find_capability(dev, PCI_CAP_ID_PCIE); |
| if (!cap) { |
| /* error... */ |
| return; |
| } |
| #ifdef CONFIG_PCIE_TUNING |
| printk(BIOS_DEBUG, "PCIe: tuning %s\n", dev_path(dev)); |
| |
| // TODO make this depending on ASPM |
| /* Enable ASPM Role Based Error Reporting */ |
| u32 reg32; |
| reg32 = pci_read_config32(dev, cap + PCI_EXP_DEVCAP); |
| reg32 |= PCI_EXP_DEVCAP_RBER; |
| pci_write_config32(dev, cap + PCI_EXP_DEVCAP, reg32); |
| #endif |
| } |
| |
| unsigned int pciexp_scan_bus(struct bus *bus, |
| unsigned min_devfn, unsigned max_devfn, |
| unsigned int max) |
| { |
| device_t child; |
| max = pci_scan_bus(bus, min_devfn, max_devfn, max); |
| for(child = bus->children; child; child = child->sibling) { |
| if ( (child->path.pci.devfn < min_devfn) || |
| (child->path.pci.devfn > max_devfn)) |
| { |
| continue; |
| } |
| pciexp_tune_dev(child); |
| } |
| return max; |
| } |
| |
| unsigned int pciexp_scan_bridge(device_t dev, unsigned int max) |
| { |
| return do_pci_scan_bridge(dev, max, pciexp_scan_bus); |
| } |
| |
| /** Default device operations for PCI Express bridges */ |
| static struct pci_operations pciexp_bus_ops_pci = { |
| .set_subsystem = 0, |
| }; |
| |
| struct device_operations default_pciexp_ops_bus = { |
| .read_resources = pci_bus_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_bus_enable_resources, |
| .init = 0, |
| .scan_bus = pciexp_scan_bridge, |
| .enable = 0, |
| .reset_bus = pci_bus_reset, |
| .ops_pci = &pciexp_bus_ops_pci, |
| }; |