On Wed, Aug 1, 2012 at 6:42 AM, Miguel Ángel Álvarez <caronteycerbero@xxxxxxxxx> wrote: > Dear all, > > We are developing a board using a Freescale P2020. This micro has > three PCIexpress ports. 2 1xlane PCIe and 1 2xlane PCIe. > > We have been able to successfully use the PCIe interfaces. > > However, now we want to expand the number of PCIe slots connecting the > 2xlane PCIe to a PCIe switch (89HPES6T5E). This switch offers a 2xlane > upstream port and 4 1xlane downstream ports. > > The problem is that we do not really know how PCIe switches are > managed in Linux. If any of you can recommend us some resources to > read, we will appreciate it very much. pcie switch should show as three or more pci bridges in the pci tree. > > If there is no information to read, let me describe our main problem. > > The question is that if I let u-boot scan the PCIe, the upstream and > downstream ports are detected as well as the cards connected to the > downstream port. However when u-boot launches Linux, this last just > finds a device (the HPES6T5E), and none of the downstream ports or > card connected to them. > > > I know that the problem could be in the u-boot, so I am trying to > analyse its code also... but I think there could be something in Linux > I am not taking into account yet. can you post whole log with pci debug enabled? Thanks Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
