On Wed, Nov 05, 2014 at 03:28:13PM +0530, Manoj Viswanath wrote: > Hi, > > I have a DPDK application running on QEMU-KVM environment using DPDK 1.6.0. > I am trying to port the same to DPDK version 1.7.1. > > I am using Virt-manager GUI to assign e1000 emulated port to the VM. This > works fine in DPDK 1.6.0. The device is identified by IGB_UIO and > initialized by my application as expected. > > However in case of DPDK 1.7.1, the emulated e1000 devices do not seem to be > recognized. > Following is my analysis: > > 1. The API pci_get_uio_dev() is returning ERROR. This is called from > pci_uio_map_resource() in the flow of PCI PROBE [rte_eal_pci_probe()]. > > 2. Due to this, the PCI device is not getting mapped to the correct driver > (EM > ? Driver? > ). > > 3. The reason for the error in [1] appears to be that "uio" sub-directory > doesn't seem to be correctly created for interfaces assigned to this VM. > > 4. Upon further analysis i found that IGB_UIO probe function > ["igbuio_pci_probe()"] is not getting triggered indicating the port has *not > been assigned* to the IGB_UIO. > > Kindly refer to the attachments:- > - "Output of sys-bus-pci-devices" - indicating "uio" subdirectory not > created for PCI devices in case of DPDK 1.7.1 > - "Output of lspci -v" - indicating device not bound to driver in case of > DPDK 1.7.1 > - IGB_UIO init log snippet - indicating PCI devices not detected and > initialized by IGB_UIO in case of DPDK 1.7.1 > - CONFIG file used for DPDK compilation > > Not sure what has changed between 1.6.0 and 1.7.1 which is impacting this. > > Could someone throw light in this regard as to what i may be missing ? > > Thanks in advance. > > Regards, > Manoj
Hi Manoj, can you perhaps give some details on how you were binding the device to the uio module both for 1.6 and for 1.7? /Bruce
