On Mon, Feb 1, 2016 at 6:14 AM, Alex Williamson <alex.williamson@xxxxxxxxxx> wrote: > On Sun, 2016-01-31 at 02:15 -0500, Ran Shalit wrote: >> Hello, >> >> I am new to pci express drivers, and would please like to ask a question. >> We develop a linux driver for a PCIe device board with 4 lanes. >> 1. Is it expected that this will be recognized as a single device or >> multiple device ? > > It depends whether your device is multifunction. > It is a video capture & output deivce, (video4linux), so I guess it means it has single functionality (video).' and therefore will aprear as a single device. >> 2. Is it that each lane rales to a different BAR or there is no >> connection between these two ? > > No relation, all PCI/e devices have the same set of standard BARs > available to them. > Thanks, So it probably means that there is no added complexity in terms of device driver with multi lanes PCIe (compared to single lane). Thank you, Ran -- 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
