diff options
Diffstat (limited to '')
| -rwxr-xr-x | tools/testing/selftests/drivers/net/mlxsw/qos_headroom.sh | 380 |
1 files changed, 380 insertions, 0 deletions
diff --git a/tools/testing/selftests/drivers/net/mlxsw/qos_headroom.sh b/tools/testing/selftests/drivers/net/mlxsw/qos_headroom.sh new file mode 100755 index 000000000000..3569ff45f7d5 --- /dev/null +++ b/tools/testing/selftests/drivers/net/mlxsw/qos_headroom.sh @@ -0,0 +1,380 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +ALL_TESTS=" + test_defaults + test_dcb_ets + test_mtu + test_pfc + test_int_buf + test_tc_priomap + test_tc_mtu + test_tc_sizes + test_tc_int_buf +" + +lib_dir=$(dirname $0)/../../../net/forwarding + +NUM_NETIFS=0 +source $lib_dir/lib.sh +source $lib_dir/devlink_lib.sh +source qos_lib.sh + +swp=$NETIF_NO_CABLE + +cleanup() +{ + pre_cleanup +} + +get_prio_pg() +{ + # Produces a string of numbers "<B0> <B1> ... <B7> ", where BX is number + # of buffer that priority X is mapped to. + dcb -j buffer show dev $swp | + jq -r '[.prio_buffer | .[] | tostring + " "] | add' +} + +get_prio_pfc() +{ + # Produces a string of numbers "<P0> <P1> ... <P7> ", where PX denotes + # whether priority X has PFC enabled (the value is 1) or disabled (0). + dcb -j pfc show dev $swp | + jq -r '[.prio_pfc | .[] | if . then "1 " else "0 " end] | add' +} + +get_prio_tc() +{ + # Produces a string of numbers "<T0> <T1> ... <T7> ", where TC is number + # of TC that priority X is mapped to. + dcb -j ets show dev $swp | + jq -r '[.prio_tc | .[] | tostring + " "] | add' +} + +get_buf_size() +{ + local idx=$1; shift + + dcb -j buffer show dev $swp | jq ".buffer_size[$idx]" +} + +get_tot_size() +{ + dcb -j buffer show dev $swp | jq '.total_size' +} + +check_prio_pg() +{ + local expect=$1; shift + + local current=$(get_prio_pg) + test "$current" = "$expect" + check_err $? "prio2buffer is '$current', expected '$expect'" +} + +check_prio_pfc() +{ + local expect=$1; shift + + local current=$(get_prio_pfc) + test "$current" = "$expect" + check_err $? "prio PFC is '$current', expected '$expect'" +} + +check_prio_tc() +{ + local expect=$1; shift + + local current=$(get_prio_tc) + test "$current" = "$expect" + check_err $? "prio_tc is '$current', expected '$expect'" +} + +__check_buf_size() +{ + local idx=$1; shift + local expr=$1; shift + local what=$1; shift + + local current=$(get_buf_size $idx) + ((current $expr)) + check_err $? "${what}buffer $idx size is '$current', expected '$expr'" + echo $current +} + +check_buf_size() +{ + __check_buf_size "$@" > /dev/null +} + +test_defaults() +{ + RET=0 + + check_prio_pg "0 0 0 0 0 0 0 0 " + check_prio_tc "0 0 0 0 0 0 0 0 " + check_prio_pfc "0 0 0 0 0 0 0 0 " + + log_test "Default headroom configuration" +} + +test_dcb_ets() +{ + RET=0 + + dcb ets set dev $swp prio-tc 0:0 1:2 2:4 3:6 4:1 5:3 6:5 7:7 + + check_prio_pg "0 2 4 6 1 3 5 7 " + check_prio_tc "0 2 4 6 1 3 5 7 " + check_prio_pfc "0 0 0 0 0 0 0 0 " + + dcb ets set dev $swp prio-tc all:0 + + check_prio_pg "0 0 0 0 0 0 0 0 " + check_prio_tc "0 0 0 0 0 0 0 0 " + + dcb buffer set dev $swp prio-buffer 0:1 1:3 2:5 3:7 4:0 5:2 6:4 7:6 2>/dev/null + check_fail $? "prio2buffer accepted in DCB mode" + + log_test "Configuring headroom through ETS" +} + +test_mtu() +{ + local what=$1; shift + local buf0size_2 + local buf0size + + RET=0 + buf0size=$(__check_buf_size 0 "> 0") + + mtu_set $swp 3000 + buf0size_2=$(__check_buf_size 0 "> $buf0size" "MTU 3000: ") + mtu_restore $swp + + mtu_set $swp 6000 + check_buf_size 0 "> $buf0size_2" "MTU 6000: " + mtu_restore $swp + + check_buf_size 0 "== $buf0size" + + log_test "${what}MTU impacts buffer size" +} + +test_tc_mtu() +{ + # In TC mode, MTU still impacts the threshold below which a buffer is + # not permitted to go. + + tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M + test_mtu "TC: " + tc qdisc delete dev $swp root +} + +test_pfc() +{ + RET=0 + + dcb ets set dev $swp prio-tc all:0 5:1 6:2 7:3 + + local buf0size=$(get_buf_size 0) + local buf1size=$(get_buf_size 1) + local buf2size=$(get_buf_size 2) + local buf3size=$(get_buf_size 3) + check_buf_size 0 "> 0" + check_buf_size 1 "> 0" + check_buf_size 2 "> 0" + check_buf_size 3 "> 0" + check_buf_size 4 "== 0" + check_buf_size 5 "== 0" + check_buf_size 6 "== 0" + check_buf_size 7 "== 0" + + log_test "Buffer size sans PFC" + + RET=0 + + dcb pfc set dev $swp prio-pfc all:off 5:on 6:on 7:on delay 0 + + check_prio_pg "0 0 0 0 0 1 2 3 " + check_prio_pfc "0 0 0 0 0 1 1 1 " + check_buf_size 0 "== $buf0size" + check_buf_size 1 "> $buf1size" + check_buf_size 2 "> $buf2size" + check_buf_size 3 "> $buf3size" + + local buf1size=$(get_buf_size 1) + check_buf_size 2 "== $buf1size" + check_buf_size 3 "== $buf1size" + + log_test "PFC: Cable length 0" + + RET=0 + + dcb pfc set dev $swp delay 1000 + + check_buf_size 0 "== $buf0size" + check_buf_size 1 "> $buf1size" + check_buf_size 2 "> $buf1size" + check_buf_size 3 "> $buf1size" + + log_test "PFC: Cable length 1000" + + RET=0 + + dcb pfc set dev $swp prio-pfc all:off delay 0 + dcb ets set dev $swp prio-tc all:0 + + check_prio_pg "0 0 0 0 0 0 0 0 " + check_prio_tc "0 0 0 0 0 0 0 0 " + check_buf_size 0 "> 0" + check_buf_size 1 "== 0" + check_buf_size 2 "== 0" + check_buf_size 3 "== 0" + check_buf_size 4 "== 0" + check_buf_size 5 "== 0" + check_buf_size 6 "== 0" + check_buf_size 7 "== 0" + + log_test "PFC: Restore defaults" +} + +test_tc_priomap() +{ + RET=0 + + dcb ets set dev $swp prio-tc 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 + check_prio_pg "0 1 2 3 4 5 6 7 " + + tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M + check_prio_pg "0 0 0 0 0 0 0 0 " + + dcb buffer set dev $swp prio-buffer 0:1 1:3 2:5 3:7 4:0 5:2 6:4 7:6 + check_prio_pg "1 3 5 7 0 2 4 6 " + + tc qdisc delete dev $swp root + check_prio_pg "0 1 2 3 4 5 6 7 " + + # Clean up. + tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M + dcb buffer set dev $swp prio-buffer all:0 + tc qdisc delete dev $swp root + dcb ets set dev $swp prio-tc all:0 + + log_test "TC: priomap" +} + +test_tc_sizes() +{ + local cell_size=$(devlink_cell_size_get) + local size=$((cell_size * 1000)) + + RET=0 + + dcb buffer set dev $swp buffer-size all:0 0:$size 2>/dev/null + check_fail $? "buffer_size should fail before qdisc is added" + + tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M + + dcb buffer set dev $swp buffer-size all:0 0:$size + check_err $? "buffer_size should pass after qdisc is added" + check_buf_size 0 "== $size" "set size: " + + mtu_set $swp 6000 + check_buf_size 0 "== $size" "set MTU: " + mtu_restore $swp + + dcb buffer set dev $swp buffer-size all:0 + + # After replacing the qdisc for the same kind, buffer_size still has to + # work. + tc qdisc replace dev $swp root handle 1: bfifo limit 1M + + dcb buffer set dev $swp buffer-size all:0 0:$size + check_buf_size 0 "== $size" "post replace, set size: " + + dcb buffer set dev $swp buffer-size all:0 + + # Likewise after replacing for a different kind. + tc qdisc replace dev $swp root handle 2: prio bands 8 + + dcb buffer set dev $swp buffer-size all:0 0:$size + check_buf_size 0 "== $size" "post replace different kind, set size: " + + tc qdisc delete dev $swp root + + dcb buffer set dev $swp buffer-size all:0 0:$size 2>/dev/null + check_fail $? "buffer_size should fail after qdisc is deleted" + + log_test "TC: buffer size" +} + +test_int_buf() +{ + local what=$1; shift + + RET=0 + + local buf0size=$(get_buf_size 0) + local tot_size=$(get_tot_size) + + # Size of internal buffer and buffer 9. + local dsize=$((tot_size - buf0size)) + + tc qdisc add dev $swp clsact + tc filter add dev $swp egress matchall skip_sw action mirred egress mirror dev $swp + + local buf0size_2=$(get_buf_size 0) + local tot_size_2=$(get_tot_size) + local dsize_2=$((tot_size_2 - buf0size_2)) + + # Egress SPAN should have added to the "invisible" buffer configuration. + ((dsize_2 > dsize)) + check_err $? "Invisible buffers account for '$dsize_2', expected '> $dsize'" + + mtu_set $swp 3000 + + local buf0size_3=$(get_buf_size 0) + local tot_size_3=$(get_tot_size) + local dsize_3=$((tot_size_3 - buf0size_3)) + + # MTU change might change buffer 0, which will show at total, but the + # hidden buffers should stay the same size. + ((dsize_3 == dsize_2)) + check_err $? "MTU change: Invisible buffers account for '$dsize_3', expected '== $dsize_2'" + + mtu_restore $swp + tc qdisc del dev $swp clsact + + # After SPAN removal, hidden buffers should be back to the original sizes. + local buf0size_4=$(get_buf_size 0) + local tot_size_4=$(get_tot_size) + local dsize_4=$((tot_size_4 - buf0size_4)) + ((dsize_4 == dsize)) + check_err $? "SPAN removed: Invisible buffers account for '$dsize_4', expected '== $dsize'" + + log_test "${what}internal buffer size" +} + +test_tc_int_buf() +{ + local cell_size=$(devlink_cell_size_get) + local size=$((cell_size * 1000)) + + tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M + test_int_buf "TC: " + + dcb buffer set dev $swp buffer-size all:0 0:$size + test_int_buf "TC+buffsize: " + + dcb buffer set dev $swp buffer-size all:0 + tc qdisc delete dev $swp root +} + +bail_on_lldpad + +trap cleanup EXIT +setup_wait +tests_run + +exit $EXIT_STATUS |