tools/testing/selftests/drivers/net/mlxsw/qos_headroom.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 ALL_TESTS="
   5         test_defaults
   6         test_dcb_ets
   7         test_mtu
   8         test_pfc
   9         test_int_buf
  10         test_tc_priomap
  11         test_tc_mtu
  12         test_tc_sizes
  13         test_tc_int_buf
  14 "
  15
  16 lib_dir=$(dirname $0)/../../../net/forwarding
  17
  18 NUM_NETIFS=0
  19 source $lib_dir/lib.sh
  20 source $lib_dir/devlink_lib.sh
  21 source qos_lib.sh
  22
  23 swp=$NETIF_NO_CABLE
  24
  25 cleanup()
  26 {
  27         pre_cleanup
  28 }
  29
  30 get_prio_pg()
  31 {
  32         __mlnx_qos -i $swp | sed -n '/^PFC/,/^[^[:space:]]/p' |
  33                 grep buffer | sed 's/ \+/ /g' | cut -d' ' -f 2-
  34 }
  35
  36 get_prio_pfc()
  37 {
  38         __mlnx_qos -i $swp | sed -n '/^PFC/,/^[^[:space:]]/p' |
  39                 grep enabled | sed 's/ \+/ /g' | cut -d' ' -f 2-
  40 }
  41
  42 get_prio_tc()
  43 {
  44         __mlnx_qos -i $swp | sed -n '/^tc/,$p' |
  45                 awk '/^tc/ { TC = $2 }
  46                      /priority:/ { PRIO[$2]=TC }
  47                      END {
  48                         for (i in PRIO)
  49                             printf("%d ", PRIO[i])
  50                      }'
  51 }
  52
  53 get_buf_size()
  54 {
  55         local idx=$1; shift
  56
  57         __mlnx_qos -i $swp | grep Receive | sed 's/.*: //' | cut -d, -f $((idx + 1))
  58 }
  59
  60 get_tot_size()
  61 {
  62         __mlnx_qos -i $swp | grep Receive | sed 's/.*total_size=//'
  63 }
  64
  65 check_prio_pg()
  66 {
  67         local expect=$1; shift
  68
  69         local current=$(get_prio_pg)
  70         test "$current" = "$expect"
  71         check_err $? "prio2buffer is '$current', expected '$expect'"
  72 }
  73
  74 check_prio_pfc()
  75 {
  76         local expect=$1; shift
  77
  78         local current=$(get_prio_pfc)
  79         test "$current" = "$expect"
  80         check_err $? "prio PFC is '$current', expected '$expect'"
  81 }
  82
  83 check_prio_tc()
  84 {
  85         local expect=$1; shift
  86
  87         local current=$(get_prio_tc)
  88         test "$current" = "$expect"
  89         check_err $? "prio_tc is '$current', expected '$expect'"
  90 }
  91
  92 __check_buf_size()
  93 {
  94         local idx=$1; shift
  95         local expr=$1; shift
  96         local what=$1; shift
  97
  98         local current=$(get_buf_size $idx)
  99         ((current $expr))
 100         check_err $? "${what}buffer $idx size is '$current', expected '$expr'"
 101         echo $current
 102 }
 103
 104 check_buf_size()
 105 {
 106         __check_buf_size "$@" > /dev/null
 107 }
 108
 109 test_defaults()
 110 {
 111         RET=0
 112
 113         check_prio_pg "0 0 0 0 0 0 0 0 "
 114         check_prio_tc "0 0 0 0 0 0 0 0 "
 115         check_prio_pfc "0 0 0 0 0 0 0 0 "
 116
 117         log_test "Default headroom configuration"
 118 }
 119
 120 test_dcb_ets()
 121 {
 122         RET=0
 123
 124         __mlnx_qos -i $swp --prio_tc=0,2,4,6,1,3,5,7 > /dev/null
 125
 126         check_prio_pg "0 2 4 6 1 3 5 7 "
 127         check_prio_tc "0 2 4 6 1 3 5 7 "
 128         check_prio_pfc "0 0 0 0 0 0 0 0 "
 129
 130         __mlnx_qos -i $swp --prio_tc=0,0,0,0,0,0,0,0 > /dev/null
 131
 132         check_prio_pg "0 0 0 0 0 0 0 0 "
 133         check_prio_tc "0 0 0 0 0 0 0 0 "
 134
 135         __mlnx_qos -i $swp --prio2buffer=1,3,5,7,0,2,4,6 &> /dev/null
 136         check_fail $? "prio2buffer accepted in DCB mode"
 137
 138         log_test "Configuring headroom through ETS"
 139 }
 140
 141 test_mtu()
 142 {
 143         local what=$1; shift
 144         local buf0size_2
 145         local buf0size
 146
 147         RET=0
 148         buf0size=$(__check_buf_size 0 "> 0")
 149
 150         mtu_set $swp 3000
 151         buf0size_2=$(__check_buf_size 0 "> $buf0size" "MTU 3000: ")
 152         mtu_restore $swp
 153
 154         mtu_set $swp 6000
 155         check_buf_size 0 "> $buf0size_2" "MTU 6000: "
 156         mtu_restore $swp
 157
 158         check_buf_size 0 "== $buf0size"
 159
 160         log_test "${what}MTU impacts buffer size"
 161 }
 162
 163 test_tc_mtu()
 164 {
 165         # In TC mode, MTU still impacts the threshold below which a buffer is
 166         # not permitted to go.
 167
 168         tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
 169         test_mtu "TC: "
 170         tc qdisc delete dev $swp root
 171 }
 172
 173 test_pfc()
 174 {
 175         RET=0
 176
 177         __mlnx_qos -i $swp --prio_tc=0,0,0,0,0,1,2,3 > /dev/null
 178
 179         local buf0size=$(get_buf_size 0)
 180         local buf1size=$(get_buf_size 1)
 181         local buf2size=$(get_buf_size 2)
 182         local buf3size=$(get_buf_size 3)
 183         check_buf_size 0 "> 0"
 184         check_buf_size 1 "> 0"
 185         check_buf_size 2 "> 0"
 186         check_buf_size 3 "> 0"
 187         check_buf_size 4 "== 0"
 188         check_buf_size 5 "== 0"
 189         check_buf_size 6 "== 0"
 190         check_buf_size 7 "== 0"
 191
 192         log_test "Buffer size sans PFC"
 193
 194         RET=0
 195
 196         __mlnx_qos -i $swp --pfc=0,0,0,0,0,1,1,1 --cable_len=0 > /dev/null
 197
 198         check_prio_pg "0 0 0 0 0 1 2 3 "
 199         check_prio_pfc "0 0 0 0 0 1 1 1 "
 200         check_buf_size 0 "== $buf0size"
 201         check_buf_size 1 "> $buf1size"
 202         check_buf_size 2 "> $buf2size"
 203         check_buf_size 3 "> $buf3size"
 204
 205         local buf1size=$(get_buf_size 1)
 206         check_buf_size 2 "== $buf1size"
 207         check_buf_size 3 "== $buf1size"
 208
 209         log_test "PFC: Cable length 0"
 210
 211         RET=0
 212
 213         __mlnx_qos -i $swp --pfc=0,0,0,0,0,1,1,1 --cable_len=1000 > /dev/null
 214
 215         check_buf_size 0 "== $buf0size"
 216         check_buf_size 1 "> $buf1size"
 217         check_buf_size 2 "> $buf1size"
 218         check_buf_size 3 "> $buf1size"
 219
 220         log_test "PFC: Cable length 1000"
 221
 222         RET=0
 223
 224         __mlnx_qos -i $swp --pfc=0,0,0,0,0,0,0,0 --cable_len=0 > /dev/null
 225         __mlnx_qos -i $swp --prio_tc=0,0,0,0,0,0,0,0 > /dev/null
 226
 227         check_prio_pg "0 0 0 0 0 0 0 0 "
 228         check_prio_tc "0 0 0 0 0 0 0 0 "
 229         check_buf_size 0 "> 0"
 230         check_buf_size 1 "== 0"
 231         check_buf_size 2 "== 0"
 232         check_buf_size 3 "== 0"
 233         check_buf_size 4 "== 0"
 234         check_buf_size 5 "== 0"
 235         check_buf_size 6 "== 0"
 236         check_buf_size 7 "== 0"
 237
 238         log_test "PFC: Restore defaults"
 239 }
 240
 241 test_tc_priomap()
 242 {
 243         RET=0
 244
 245         __mlnx_qos -i $swp --prio_tc=0,1,2,3,4,5,6,7 > /dev/null
 246         check_prio_pg "0 1 2 3 4 5 6 7 "
 247
 248         tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
 249         check_prio_pg "0 0 0 0 0 0 0 0 "
 250
 251         __mlnx_qos -i $swp --prio2buffer=1,3,5,7,0,2,4,6 > /dev/null
 252         check_prio_pg "1 3 5 7 0 2 4 6 "
 253
 254         tc qdisc delete dev $swp root
 255         check_prio_pg "0 1 2 3 4 5 6 7 "
 256
 257         # Clean up.
 258         tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
 259         __mlnx_qos -i $swp --prio2buffer=0,0,0,0,0,0,0,0 > /dev/null
 260         tc qdisc delete dev $swp root
 261         __mlnx_qos -i $swp --prio_tc=0,0,0,0,0,0,0,0 > /dev/null
 262
 263         log_test "TC: priomap"
 264 }
 265
 266 test_tc_sizes()
 267 {
 268         local cell_size=$(devlink_cell_size_get)
 269         local size=$((cell_size * 1000))
 270
 271         RET=0
 272
 273         __mlnx_qos -i $swp --buffer_size=$size,0,0,0,0,0,0,0 &> /dev/null
 274         check_fail $? "buffer_size should fail before qdisc is added"
 275
 276         tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
 277
 278         __mlnx_qos -i $swp --buffer_size=$size,0,0,0,0,0,0,0 > /dev/null
 279         check_err $? "buffer_size should pass after qdisc is added"
 280         check_buf_size 0 "== $size" "set size: "
 281
 282         mtu_set $swp 6000
 283         check_buf_size 0 "== $size" "set MTU: "
 284         mtu_restore $swp
 285
 286         __mlnx_qos -i $swp --buffer_size=0,0,0,0,0,0,0,0 > /dev/null
 287
 288         # After replacing the qdisc for the same kind, buffer_size still has to
 289         # work.
 290         tc qdisc replace dev $swp root handle 1: bfifo limit 1M
 291
 292         __mlnx_qos -i $swp --buffer_size=$size,0,0,0,0,0,0,0 > /dev/null
 293         check_buf_size 0 "== $size" "post replace, set size: "
 294
 295         __mlnx_qos -i $swp --buffer_size=0,0,0,0,0,0,0,0 > /dev/null
 296
 297         # Likewise after replacing for a different kind.
 298         tc qdisc replace dev $swp root handle 2: prio bands 8
 299
 300         __mlnx_qos -i $swp --buffer_size=$size,0,0,0,0,0,0,0 > /dev/null
 301         check_buf_size 0 "== $size" "post replace different kind, set size: "
 302
 303         tc qdisc delete dev $swp root
 304
 305         __mlnx_qos -i $swp --buffer_size=$size,0,0,0,0,0,0,0 &> /dev/null
 306         check_fail $? "buffer_size should fail after qdisc is deleted"
 307
 308         log_test "TC: buffer size"
 309 }
 310
 311 test_int_buf()
 312 {
 313         local what=$1; shift
 314
 315         RET=0
 316
 317         local buf0size=$(get_buf_size 0)
 318         local tot_size=$(get_tot_size)
 319
 320         # Size of internal buffer and buffer 9.
 321         local dsize=$((tot_size - buf0size))
 322
 323         tc qdisc add dev $swp clsact
 324         tc filter add dev $swp egress matchall skip_sw action mirred egress mirror dev $swp
 325
 326         local buf0size_2=$(get_buf_size 0)
 327         local tot_size_2=$(get_tot_size)
 328         local dsize_2=$((tot_size_2 - buf0size_2))
 329
 330         # Egress SPAN should have added to the "invisible" buffer configuration.
 331         ((dsize_2 > dsize))
 332         check_err $? "Invisible buffers account for '$dsize_2', expected '> $dsize'"
 333
 334         mtu_set $swp 3000
 335
 336         local buf0size_3=$(get_buf_size 0)
 337         local tot_size_3=$(get_tot_size)
 338         local dsize_3=$((tot_size_3 - buf0size_3))
 339
 340         # MTU change might change buffer 0, which will show at total, but the
 341         # hidden buffers should stay the same size.
 342         ((dsize_3 == dsize_2))
 343         check_err $? "MTU change: Invisible buffers account for '$dsize_3', expected '== $dsize_2'"
 344
 345         mtu_restore $swp
 346         tc qdisc del dev $swp clsact
 347
 348         # After SPAN removal, hidden buffers should be back to the original sizes.
 349         local buf0size_4=$(get_buf_size 0)
 350         local tot_size_4=$(get_tot_size)
 351         local dsize_4=$((tot_size_4 - buf0size_4))
 352         ((dsize_4 == dsize))
 353         check_err $? "SPAN removed: Invisible buffers account for '$dsize_4', expected '== $dsize'"
 354
 355         log_test "${what}internal buffer size"
 356 }
 357
 358 test_tc_int_buf()
 359 {
 360         local cell_size=$(devlink_cell_size_get)
 361         local size=$((cell_size * 1000))
 362
 363         tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
 364         test_int_buf "TC: "
 365
 366         __mlnx_qos -i $swp --buffer_size=$size,0,0,0,0,0,0,0 > /dev/null
 367         test_int_buf "TC+buffsize: "
 368
 369         __mlnx_qos -i $swp --buffer_size=0,0,0,0,0,0,0,0 > /dev/null
 370         tc qdisc delete dev $swp root
 371 }
 372
 373 trap cleanup EXIT
 374
 375 bail_on_lldpad
 376 setup_wait
 377 tests_run
 378
 379 exit $EXIT_STATUS