tools/testing/selftests/drivers/net/ocelot/psfp.sh

Source file repositories/reference/linux-study-clean/tools/testing/selftests/drivers/net/ocelot/psfp.sh

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/drivers/net/ocelot/psfp.sh
Extension
.sh
Size
6951 bytes
Lines
324
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright 2021-2022 NXP

# Note: On LS1028A, in lack of enough user ports, this setup requires patching
# the device tree to use the second CPU port as a user port

WAIT_TIME=1
NUM_NETIFS=4
STABLE_MAC_ADDRS=yes
NETIF_CREATE=no
lib_dir=$(dirname $0)/../../../net/forwarding
source $lib_dir/tc_common.sh
source $lib_dir/lib.sh
source $lib_dir/tsn_lib.sh

UDS_ADDRESS_H1="/var/run/ptp4l_h1"
UDS_ADDRESS_SWP1="/var/run/ptp4l_swp1"

# Tunables
NUM_PKTS=1000
STREAM_VID=100
STREAM_PRIO=6
# Use a conservative cycle of 10 ms to allow the test to still pass when the
# kernel has some extra overhead like lockdep etc
CYCLE_TIME_NS=10000000
# Create two Gate Control List entries, one OPEN and one CLOSE, of equal
# durations
GATE_DURATION_NS=$((${CYCLE_TIME_NS} / 2))
# Give 2/3 of the cycle time to user space and 1/3 to the kernel
FUDGE_FACTOR=$((${CYCLE_TIME_NS} / 3))
# Shift the isochron base time by half the gate time, so that packets are
# always received by swp1 close to the middle of the time slot, to minimize
# inaccuracies due to network sync
SHIFT_TIME_NS=$((${GATE_DURATION_NS} / 2))

h1=${NETIFS[p1]}
swp1=${NETIFS[p2]}
swp2=${NETIFS[p3]}
h2=${NETIFS[p4]}

H1_IPV4="192.0.2.1"
H2_IPV4="192.0.2.2"
H1_IPV6="2001:db8:1::1"
H2_IPV6="2001:db8:1::2"

# Chain number exported by the ocelot driver for
# Per-Stream Filtering and Policing filters
PSFP()
{
	echo 30000
}

psfp_chain_create()
{
	local if_name=$1

	tc qdisc add dev $if_name clsact

	tc filter add dev $if_name ingress chain 0 pref 49152 flower \
		skip_sw action goto chain $(PSFP)
}

psfp_chain_destroy()
{
	local if_name=$1

	tc qdisc del dev $if_name clsact
}

Annotation

Implementation Notes