write to /sys/bus/pci/drivers/uio_pci_generic/bind is failing

Question

root@prab:/usr/src/dpdk-stable-22.11.1/usertools# echo sh -c 0000:51:00.0 > /sys/bus/pci/drivers/uio_pci_generic/bind bash: echo: write error: No such device root@prab:/usr/src/dpdk-stable-22.11.1/usertools# sudo echo sh -c 0000:51:00.0 > /sys/bus/pci/drivers/uio_pci_generic/bind echo: write error: No such device root@prab:/usr/src/dpdk-stable-22.11.1/usertools#

root@prab:/usr/src/dpdk-stable-22.11.1/usertools# lsmod | grep uio_pci_generic uio_pci_generic 16384 0 uio 20480 1 uio_pci_generic root@prab:/usr/src/dpdk-stable-22.11.1/usertools#

root@prab:/usr/src/dpdk-stable-22.11.1/usertools# lspci -v -s 0000:51:00.0 51:00.0 Ethernet controller: Intel Corporation Ethernet Controller X710 for 10GbE SFP+ (rev 02)

root@prab:/usr/src/dpdk-stable-22.11.1/usertools# echo sh -c 0000:51:00.0 > /sys/bus/pci/drivers/uio_pci_generic/bind bash: echo: write error: No such device root@prab:/usr/src/dpdk-stable-22.11.1/usertools# sudo echo sh -c 0000:51:00.0 > /sys/bus/pci/drivers/uio_pci_generic/bind echo: write error: No such device root@prab:/usr/src/dpdk-stable-22.11.1/usertools#

Tried running the script dpdk-devbind.py, that also fails due to the abive reason

root@prab:/usr/src/dpdk-stable-22.11.1/usertools# ./dpdk-devbind.py --status

... ... ... Other Network devices

0000:51:00.0 'Ethernet Controller X710 for 10GbE SFP+ 1572' unused=i40e,vfio-pci,uio_pci_generic

I am using the following versions :

root@prab:/usr/src/dpdk-stable-22.11.1/usertools# uname -a Linux prab 5.15.0-60-generic #66-Ubuntu SMP Fri Jan 20 14:29:49 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux root@prab:/usr/src/dpdk-stable-22.11.1/usertools#

root@prab:/usr/src/dpdk-stable-22.11.1/usertools# pkg-config --modversion libdpdk 22.11.1 root@prab:/usr/src/dpdk-stable-22.11.1/usertools#

Answer 1

I do not know what sh -c means in your command.

A bind in fact needs two write actions: (for kernel > 3.15)

echo uio_pci_generic > /sys/bus/pci/devices/0000:51:00.0/driver_override

echo 0000:51:00.0 > /sys/bus/pci/drivers/uio_pci_generic/bind

Also it should work only after unbind in previous action.

Why don't you use dpdk-devbind.py -b uio_pci_generic 0000:51:00.0 . This script has been developed for this purpose.