diff options
Diffstat (limited to 'freebsd/sys/dev/pci/pci_pci.c')
| -rw-r--r-- | freebsd/sys/dev/pci/pci_pci.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/freebsd/sys/dev/pci/pci_pci.c b/freebsd/sys/dev/pci/pci_pci.c index 20364cf9..ec52e1fb 100644 --- a/freebsd/sys/dev/pci/pci_pci.c +++ b/freebsd/sys/dev/pci/pci_pci.c @@ -2547,6 +2547,22 @@ pcib_enable_ari(struct pcib_softc *sc, uint32_t pcie_pos) int pcib_maxslots(device_t dev) { +#if !defined(__amd64__) && !defined(__i386__) + uint32_t pcie_pos; + uint16_t val; + + /* + * If this is a PCIe rootport or downstream switch port, there's only + * one slot permitted. + */ + if (pci_find_cap(dev, PCIY_EXPRESS, &pcie_pos) == 0) { + val = pci_read_config(dev, pcie_pos + PCIER_FLAGS, 2); + val &= PCIEM_FLAGS_TYPE; + if (val == PCIEM_TYPE_ROOT_PORT || + val == PCIEM_TYPE_DOWNSTREAM_PORT) + return (0); + } +#endif return (PCI_SLOTMAX); } @@ -2560,7 +2576,7 @@ pcib_ari_maxslots(device_t dev) if (sc->flags & PCIB_ENABLE_ARI) return (PCIE_ARI_SLOTMAX); else - return (PCI_SLOTMAX); + return (pcib_maxslots(dev)); } static int |