diff options
| author | Patrick Rudolph <patrick.rudolph@9elements.com> | 2023-10-02 08:55:52 +0200 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2023-10-12 12:39:42 +0000 |
| commit | 2fcef78ff84c184f7a9dd0e007c95b56cda552f5 (patch) | |
| tree | 8d70116da99863027a0df44d707202bb820314b7 /src/southbridge/intel | |
| parent | f94a522086acb7ce2d4b9483953f73caad5c38d8 (diff) | |
sb/intel/bd82x6x: Warn about slow PCIe downstream devices
Warn when a device took longer than usual to appear.
Use the PDS bit to detect if a root port has a downstream
device connected and warn if enumeration failed.
Test: On Lenovo X220 all PCIe device are visible, thus the
added code path is never taken.
Change-Id: I86b498b89d672b239d9951e116dc3680030666a6
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78229
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/southbridge/intel')
| -rw-r--r-- | src/southbridge/intel/bd82x6x/pcie.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/southbridge/intel/bd82x6x/pcie.c b/src/southbridge/intel/bd82x6x/pcie.c index 2658fd31ef..45ce5aadd3 100644 --- a/src/southbridge/intel/bd82x6x/pcie.c +++ b/src/southbridge/intel/bd82x6x/pcie.c @@ -243,12 +243,18 @@ static void pch_pcie_enable(struct device *dev) static void pch_pciexp_scan_bridge(struct device *dev) { + uint32_t cap = pci_find_capability(dev, PCI_CAP_ID_PCIE); + if (CONFIG(PCIEXP_HOTPLUG) && pci_is_hotplugable(dev)) { pciexp_hotplug_scan_bridge(dev); } else { /* Normal PCIe Scan */ pciexp_scan_bridge(dev); } + if ((pci_read_config16(dev, cap + PCI_EXP_SLTSTA) & PCI_EXP_SLTSTA_PDS) && + !dev_is_active_bridge(dev)) + printk(BIOS_WARNING, "%s: Has a slow downstream device. Enumeration failed.\n", + dev_path(dev)); /* Late Power Management init after bridge device enumeration */ pch_pcie_pm_late(dev); |