Shell to setup the nic driver interfaces.
This script is given a list of PCI addresses, and will unbind the current
running linux driver and bind the pci-vfio driver there instead.
Also enable user permission for vfio groups...
Must be run as root.
When sourced, also sets the ODP_PKTIO_IF<n> environment variables.
For instance, syntax is: source pktio_setup_nic 0000:23:00.0 0000:23:00.1
The usage of this script is still manual. It is meant to be called in the
future pktio_run_nic script in the future.
Signed-off-by: Christophe Milard <christophe.mil...@linaro.org>
---
platform/linux-generic/test/pktio/pktio_setup_nic | 105 ++++++++++++++++++++++
1 file changed, 105 insertions(+)
create mode 100755 platform/linux-generic/test/pktio/pktio_setup_nic
diff --git a/platform/linux-generic/test/pktio/pktio_setup_nic
b/platform/linux-generic/test/pktio/pktio_setup_nic
new file mode 100755
index 0000000..640930c
--- /dev/null
+++ b/platform/linux-generic/test/pktio/pktio_setup_nic
@@ -0,0 +1,105 @@
+#!/bin/bash
+#this script must be run as root (modprobe etc...)
+
+setup_vfio() {
+ user=$1
+ shift
+
+ #iommu should be running for the following to work:
+ #on intel, put kernel boot option "intel_iommu=on"
+
+ #read the PCI group it belongs to:
+ grp=`readlink /sys/bus/pci/devices/${target}/iommu_group `
+ grp=`echo ${grp} | grep -o '[^/]*$'`
+ echo target ${target} is in group: ${grp}
+
+ modprobe vfio-pci
+
+ #collect the PCI vendor:ID of the selected device:
+ addr=`lspci -n -mm -s ${target} | cut -d' ' -f3-4 | sed -e's/"//g'`
+
+ #unbind the current driver:
+ echo ${target} > /sys/bus/pci/devices/${target}/driver/unbind
+
+ #and bind it to the vfio-pci driver
+ #Binding the device to the vfio-pci driver creates the VFIO group
+ #character devices for this group:
+
+ echo ${addr} > /sys/bus/pci/drivers/vfio-pci/new_id
+
+ #Now we need to look at what other devices are in the group to free
+ #it for use by VFIO:
+
+ #check manually that no other devices are in the same group:
+ #If more than the PCI bridge is listed here, remove these
+ #devices manually from the group.
+ #ls -l /sys/bus/pci/devices/${target}/iommu_group/devices
+
+ #give user access to the group:
+ chown $user:$user /dev/vfio/${grp}
+ #to ba able to map the config space??? not possible via vfio!??
+ chmod a+rw /sys/bus/pci/devices/${target}/config
+}
+
+usage() {
+ prog=$1
+ echo -e "$prog [user=<user>] <pci_address> [<pci_address>*]"
+ echo -e "\t for instance: $prog 0000:23:00.0 0000:23:00.1"
+ echo -e "\t or $prog user=donaldduck 0000:23:00.0 0000:23:00.1"
+ echo -e "\t the script will attempt to sudo if not root."
+ echo -e "\t Environment variables ODP_PKTIO_IF<n> are set if sourced."
+ echo -e "It is assumed that the differents devices belongs to different "
+ echo -e "vfio groups."
+ echo
+}
+
+############################### MAIN #########################
+
+#collect the name of the program being run
+if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then
+ prog=${BASH_SOURCE[0]}
+ sourced=yes
+else
+ sourced=no
+ prog=$0
+fi
+
+
+#help?
+if [[ "x$1" = "x-h" || "x$1" = "x--help" || "x$1" = "x" ]]; then
+ usage $prog
+ if [[ "$sourced" = yes ]]; then
+ return 0
+ else
+ exit 0
+ fi
+fi
+
+#check if first arg is user=<user> (with no space):
+#default to current user if no user given
+first_arg=$1
+if [[ ${first_arg:0:5} = 'user=' ]]; then
+ user=$(echo $first_arg| cut -d'=' -f 2)
+ shift
+else
+ user=$(whoami)
+fi
+
+##root? : do real setup:
+index=0
+if [[ "$(id -u)" = "0" ]]; then
+ for target in $*; do
+ echo "setting up ${target}"
+ setup_vfio $user ${target}
+ export ODP_PKTIO_IF${index}="pmd:${target}"
+ export ODP_WAIT_FOR_NETWORK=1
+ ((index++))
+ done
+else #try to sudo
+ sudo $prog "user=$user" $*
+ for target in $*; do
+ export ODP_PKTIO_IF${index}="pmd:${target}"
+ export ODP_WAIT_FOR_NETWORK=1
+ ((index++))
+ done
+fi
--
2.1.4
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