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device/pci_device: Set bridge primary bus number before scanning 

Certain devices, such as the Intel 82575GB, contain multiple nested
PCIe bridges (for example the PES12N3A).  Coreboot does not set
the primary bus number of the lower bridges, causing upstream
forwarding failure.  This in turn causes coreboot to fail to find
the lowest devices (in this case the NICs), and as a result the
required resources are not allocated and the NICs do not function.

Change-Id: I4fd3aa21a04dbe89ac6a5995e7707af914d432b1
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/12186
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Peter Stuge <peter@stuge.se>
This commit is contained in:
Timothy Pearson 2015-10-24 20:34:57 -05:00 committed by Peter Stuge
parent d657446884
commit 7d8a478e70
1 changed files with 1 additions and 0 deletions
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1
src/device/pci_device.c
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@ -1180,6 +1180,7 @@ static void pci_bridge_route(struct bus *link, scan_state state)
if (state == PCI_ROUTE_CLOSE) {
buses |= 0xfeff << 8;
} else if (state == PCI_ROUTE_SCAN) {
buses |= parent->secondary & 0xff;
buses |= ((u32) link->secondary & 0xff) << 8;
buses |= 0xff << 16; /* MAX PCI_BUS number here */
} else if (state == PCI_ROUTE_FINAL) {