Has anyone contemplated providing access to the PCI config space (pci_read_config_[byte|word|dword]) for DPDK? It seems simple to perform, some preliminary testing by me seems to indicate opening the /sys/bus/pci/devices/<domain:bus:loc.func>/config file, seeking to the correct offset and reading off the value.
It seems to be correctly returning expected values and sysfs-pci.txt seems to indicate that this is RW so you can set values as well. It would seem a natural to make the PCI support code in DPDK more fully capable of porting PCI drivers. I realize that somethings should be avoid (ie. causing interrupts), but I know that my device needs to modify bits in both the DEVCTL field of the PCI config and a BAR0 register to ensure they have the same value. Thoughts? Thanks, Patrick
