On Sun, Mar 14, 2010 at 11:18:05PM +0400, Manu Abraham wrote: > Hi All, > > I have one of these PCIe switches on one of the PCIe cards that I have: > > http://www.plxtech.com/products/expresslane/pex8604 > > I was wondering how to handle this thing, ie; > > I have to PCIe devices behind this switch, which looks thus: > > 06:00.0 PCI bridge: PLX Technology, Inc. Device 8604 (rev ba) > 07:01.0 PCI bridge: PLX Technology, Inc. Device 8604 (rev ba) > 07:04.0 PCI bridge: PLX Technology, Inc. Device 8604 (rev ba) > 07:05.0 PCI bridge: PLX Technology, Inc. Device 8604 (rev ba) > 09:00.0 Multimedia controller: Philips Semiconductors Device 7231 (rev aa) > 0a:00.0 Multimedia controller: Philips Semiconductors Device 7231 (rev aa) Can you post "lspci -vt" and "lspci -v" output? It will tell us alot more about the heirarchy and address space routing. > I am wondering if i need to access or address the switch specifically > to forward data specifically to one of the bridges behind the switch. No. MMIO routing is handling by MMIO "window" register in the bridge. While it's called a "switch" because it can route MMIO transactions from one downstream PCI-e link to any other. > At present I can access one of the Multimedia controllers (09:00.0) , > but it seems I can't access the other one and hence my question as to > determine whether it is something else. "lspci -vt" will show what is visible in PCI Config space. "lspci -v" will tell us how the bridge is configured. hth, grant -- 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
