On Wed, Jul 19, 2017 at 04:20:14PM +0300, Aleksandr Bezzubikov wrote:
> In case of RedHat PCI bridges reserve additional buses, which number is
> provided
It is "Red Hat"
> in a vendor-specific capability.
And perhaps also a #define ?
>
> Signed-off-by: Aleksandr Bezzubikov <zuban...@gmail.com>
> ---
> src/fw/pciinit.c | 12 ++++++++++--
> 1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/src/fw/pciinit.c b/src/fw/pciinit.c
> index 08221e6..b6f3a01 100644
> --- a/src/fw/pciinit.c
> +++ b/src/fw/pciinit.c
> @@ -578,9 +578,17 @@ pci_bios_init_bus_rec(int bus, u8 *pci_bus)
> pci_bios_init_bus_rec(secbus, pci_bus);
>
> if (subbus != *pci_bus) {
> + u16 vendor = pci_config_readw(bdf, PCI_VENDOR_ID);
> + u8 res_bus = 0;
> + if (vendor == 0x1b36) {
> + u8 cap = pci_find_capability_bdf(bdf, PCI_CAP_ID_VNDR, 0);
> + if (cap) {
> + res_bus = pci_config_readb(bdf, cap + 16);
> + }
> + }
> dprintf(1, "PCI: subordinate bus = 0x%x -> 0x%x\n",
> - subbus, *pci_bus);
> - subbus = *pci_bus;
> + subbus, *pci_bus + res_bus);
> + subbus = *pci_bus + res_bus;
> } else {
> dprintf(1, "PCI: subordinate bus = 0x%x\n", subbus);
> }
> --
> 2.7.4
>
>
