1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright 2021-2022 NXP
4
5 # Note: On LS1028A, in lack of enough user ports, this setup requires patching
6 # the device tree to use the second CPU port as a user port
7
8 WAIT_TIME=1
9 NUM_NETIFS=4
10 STABLE_MAC_ADDRS=yes
11 NETIF_CREATE=no
12 lib_dir=$(dirname $0)/../../../net/forwarding
13 source $lib_dir/tc_common.sh
14 source $lib_dir/lib.sh
15 source $lib_dir/tsn_lib.sh
16
17 UDS_ADDRESS_H1="/var/run/ptp4l_h1"
18 UDS_ADDRESS_SWP1="/var/run/ptp4l_swp1"
19
20 # Tunables
21 NUM_PKTS=1000
22 STREAM_VID=100
23 STREAM_PRIO=6
24 # Use a conservative cycle of 10 ms to allow the test to still pass when the
25 # kernel has some extra overhead like lockdep etc
26 CYCLE_TIME_NS=10000000
27 # Create two Gate Control List entries, one OPEN and one CLOSE, of equal
28 # durations
29 GATE_DURATION_NS=$((${CYCLE_TIME_NS} / 2))
30 # Give 2/3 of the cycle time to user space and 1/3 to the kernel
31 FUDGE_FACTOR=$((${CYCLE_TIME_NS} / 3))
32 # Shift the isochron base time by half the gate time, so that packets are
33 # always received by swp1 close to the middle of the time slot, to minimize
34 # inaccuracies due to network sync
35 SHIFT_TIME_NS=$((${GATE_DURATION_NS} / 2))
36
37 h1=${NETIFS[p1]}
38 swp1=${NETIFS[p2]}
39 swp2=${NETIFS[p3]}
40 h2=${NETIFS[p4]}
41
42 H1_IPV4="192.0.2.1"
43 H2_IPV4="192.0.2.2"
44 H1_IPV6="2001:db8:1::1"
45 H2_IPV6="2001:db8:1::2"
46
47 # Chain number exported by the ocelot driver for
48 # Per-Stream Filtering and Policing filters
49 PSFP()
50 {
51 echo 30000
52 }
53
54 psfp_chain_create()
55 {
56 local if_name=$1
57
58 tc qdisc add dev $if_name clsact
59
60 tc filter add dev $if_name ingress chain 0 pref 49152 flower \
61 skip_sw action goto chain $(PSFP)
62 }
63
64 psfp_chain_destroy()
65 {
66 local if_name=$1
67
68 tc qdisc del dev $if_name clsact
69 }
70
71 psfp_filter_check()
72 {
73 local expected=$1
74 local packets=""
75 local drops=""
76 local stats=""
77
78 stats=$(tc -j -s filter show dev ${swp1} ingress chain $(PSFP) pref 1)
79 packets=$(echo ${stats} | jq ".[1].options.actions[].stats.packets")
80 drops=$(echo ${stats} | jq ".[1].options.actions[].stats.drops")
81
82 if ! [ "${packets}" = "${expected}" ]; then
83 printf "Expected filter to match on %d packets but matched on %d instead\n" \
84 "${expected}" "${packets}"
85 fi
86
87 echo "Hardware filter reports ${drops} drops"
88 }
89
90 h1_create()
91 {
92 simple_if_init $h1 $H1_IPV4/24 $H1_IPV6/64
93 }
94
95 h1_destroy()
96 {
97 simple_if_fini $h1 $H1_IPV4/24 $H1_IPV6/64
98 }
99
100 h2_create()
101 {
102 simple_if_init $h2 $H2_IPV4/24 $H2_IPV6/64
103 }
104
105 h2_destroy()
106 {
107 simple_if_fini $h2 $H2_IPV4/24 $H2_IPV6/64
108 }
109
110 switch_create()
111 {
112 local h2_mac_addr=$(mac_get $h2)
113
114 ip link set ${swp1} up
115 ip link set ${swp2} up
116
117 ip link add br0 type bridge vlan_filtering 1
118 ip link set ${swp1} master br0
119 ip link set ${swp2} master br0
120 ip link set br0 up
121
122 bridge vlan add dev ${swp2} vid ${STREAM_VID}
123 bridge vlan add dev ${swp1} vid ${STREAM_VID}
124 # PSFP on Ocelot requires the filter to also be added to the bridge
125 # FDB, and not be removed
126 bridge fdb add dev ${swp2} \
127 ${h2_mac_addr} vlan ${STREAM_VID} static master
128
129 psfp_chain_create ${swp1}
130
131 tc filter add dev ${swp1} ingress chain $(PSFP) pref 1 \
132 protocol 802.1Q flower skip_sw \
133 dst_mac ${h2_mac_addr} vlan_id ${STREAM_VID} \
134 action gate base-time 0.000000000 \
135 sched-entry OPEN ${GATE_DURATION_NS} -1 -1 \
136 sched-entry CLOSE ${GATE_DURATION_NS} -1 -1
137 }
138
139 switch_destroy()
140 {
141 psfp_chain_destroy ${swp1}
142 ip link del br0
143 }
144
145 txtime_setup()
146 {
147 local if_name=$1
148
149 tc qdisc add dev ${if_name} clsact
150 # Classify PTP on TC 7 and isochron on TC 6
151 tc filter add dev ${if_name} egress protocol 0x88f7 \
152 flower action skbedit priority 7
153 tc filter add dev ${if_name} egress protocol 802.1Q \
154 flower vlan_ethtype 0xdead action skbedit priority 6
155 tc qdisc add dev ${if_name} handle 100: parent root mqprio num_tc 8 \
156 queues 1@0 1@1 1@2 1@3 1@4 1@5 1@6 1@7 \
157 map 0 1 2 3 4 5 6 7 \
158 hw 1
159 # Set up TC 6 for SO_TXTIME. tc-mqprio queues count from 1.
160 tc qdisc replace dev ${if_name} parent 100:$((${STREAM_PRIO} + 1)) etf \
161 clockid CLOCK_TAI offload delta ${FUDGE_FACTOR}
162 }
163
164 txtime_cleanup()
165 {
166 local if_name=$1
167
168 tc qdisc del dev ${if_name} root
169 tc qdisc del dev ${if_name} clsact
170 }
171
172 setup_prepare()
173 {
174 vrf_prepare
175
176 h1_create
177 h2_create
178 switch_create
179
180 txtime_setup ${h1}
181
182 # Set up swp1 as a master PHC for h1, synchronized to the local
183 # CLOCK_REALTIME.
184 phc2sys_start ${UDS_ADDRESS_SWP1}
185
186 # Assumption true for LS1028A: h1 and h2 use the same PHC. So by
187 # synchronizing h1 to swp1 via PTP, h2 is also implicitly synchronized
188 # to swp1 (and both to CLOCK_REALTIME).
189 ptp4l_start ${h1} true ${UDS_ADDRESS_H1}
190 ptp4l_start ${swp1} false ${UDS_ADDRESS_SWP1}
191
192 # Make sure there are no filter matches at the beginning of the test
193 psfp_filter_check 0
194 }
195
196 cleanup()
197 {
198 pre_cleanup
199
200 ptp4l_stop ${swp1}
201 ptp4l_stop ${h1}
202 phc2sys_stop
203 isochron_recv_stop
204
205 txtime_cleanup ${h1}
206
207 h2_destroy
208 h1_destroy
209 switch_destroy
210
211 vrf_cleanup
212 }
213
214 debug_incorrectly_dropped_packets()
215 {
216 local isochron_dat=$1
217 local dropped_seqids
218 local seqid
219
220 echo "Packets incorrectly dropped:"
221
222 dropped_seqids=$(isochron report \
223 --input-file "${isochron_dat}" \
224 --printf-format "%u RX hw %T\n" \
225 --printf-args "qR" | \
226 grep 'RX hw 0.000000000' | \
227 awk '{print $1}')
228
229 for seqid in ${dropped_seqids}; do
230 isochron report \
231 --input-file "${isochron_dat}" \
232 --start ${seqid} --stop ${seqid} \
233 --printf-format "seqid %u scheduled for %T, HW TX timestamp %T\n" \
234 --printf-args "qST"
235 done
236 }
237
238 debug_incorrectly_received_packets()
239 {
240 local isochron_dat=$1
241
242 echo "Packets incorrectly received:"
243
244 isochron report \
245 --input-file "${isochron_dat}" \
246 --printf-format "seqid %u scheduled for %T, HW TX timestamp %T, HW RX timestamp %T\n" \
247 --printf-args "qSTR" |
248 grep -v 'HW RX timestamp 0.000000000'
249 }
250
251 run_test()
252 {
253 local base_time=$1
254 local expected=$2
255 local test_name=$3
256 local debug=$4
257 local isochron_dat="$(mktemp)"
258 local extra_args=""
259 local received
260
261 isochron_do \
262 "${h1}" \
263 "${h2}" \
264 "${UDS_ADDRESS_H1}" \
265 "" \
266 "${base_time}" \
267 "${CYCLE_TIME_NS}" \
268 "${SHIFT_TIME_NS}" \
269 "${NUM_PKTS}" \
270 "${STREAM_VID}" \
271 "${STREAM_PRIO}" \
272 "" \
273 "${isochron_dat}"
274
275 # Count all received packets by looking at the non-zero RX timestamps
276 received=$(isochron report \
277 --input-file "${isochron_dat}" \
278 --printf-format "%u\n" --printf-args "R" | \
279 grep -w -v '0' | wc -l)
280
281 if [ "${received}" = "${expected}" ]; then
282 RET=0
283 else
284 RET=1
285 echo "Expected isochron to receive ${expected} packets but received ${received}"
286 fi
287
288 log_test "${test_name}"
289
290 if [ "$RET" = "1" ]; then
291 ${debug} "${isochron_dat}"
292 fi
293
294 rm ${isochron_dat} 2> /dev/null
295 }
296
297 test_gate_in_band()
298 {
299 # Send packets in-band with the OPEN gate entry
300 run_test 0.000000000 ${NUM_PKTS} "In band" \
301 debug_incorrectly_dropped_packets
302
303 psfp_filter_check ${NUM_PKTS}
304 }
305
306 test_gate_out_of_band()
307 {
308 # Send packets in-band with the CLOSE gate entry
309 run_test 0.005000000 0 "Out of band" \
310 debug_incorrectly_received_packets
311
312 psfp_filter_check $((2 * ${NUM_PKTS}))
313 }
314
315 trap cleanup EXIT
316
317 ALL_TESTS="
318 test_gate_in_band
319 test_gate_out_of_band
320 "
321
322 setup_prepare
323 setup_wait
324
325 tests_run
326
327 exit $EXIT_STATUS
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