selftests: mlxsw: Add TC flower test for Spectrum-2

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/drivers/net/mlxsw/spectrum-2/tc_flower.sh b/tools/testing/selftests/drivers/net/mlxsw/spectrum-2/tc_flower.sh
new file mode 100755 (executable)
index 0000000..3b75180
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/mlxsw/spectrum-2/tc_flower.sh
@@ -0,0 +1,366 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# This test is for checking the A-TCAM and C-TCAM operation in Spectrum-2.
+# It tries to exercise as many code paths in the eRP state machine as
+# possible.
+
+lib_dir=$(dirname $0)/../../../../net/forwarding
+
+ALL_TESTS="single_mask_test identical_filters_test two_masks_test \
+       multiple_masks_test ctcam_edge_cases_test"
+NUM_NETIFS=2
+source $lib_dir/tc_common.sh
+source $lib_dir/lib.sh
+
+tcflags="skip_hw"
+
+h1_create()
+{
+       simple_if_init $h1 192.0.2.1/24 198.51.100.1/24
+}
+
+h1_destroy()
+{
+       simple_if_fini $h1 192.0.2.1/24 198.51.100.1/24
+}
+
+h2_create()
+{
+       simple_if_init $h2 192.0.2.2/24 198.51.100.2/24
+       tc qdisc add dev $h2 clsact
+}
+
+h2_destroy()
+{
+       tc qdisc del dev $h2 clsact
+       simple_if_fini $h2 192.0.2.2/24 198.51.100.2/24
+}
+
+single_mask_test()
+{
+       # When only a single mask is required, the device uses the master
+       # mask and not the eRP table. Verify that under this mode the right
+       # filter is matched
+
+       RET=0
+
+       tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
+               $tcflags dst_ip 192.0.2.2 action drop
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 101 1
+       check_err $? "Single filter - did not match"
+
+       tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
+               $tcflags dst_ip 198.51.100.2 action drop
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 101 2
+       check_err $? "Two filters - did not match highest priority"
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 198.51.100.1 -B 198.51.100.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 102 1
+       check_err $? "Two filters - did not match lowest priority"
+
+       tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 198.51.100.1 -B 198.51.100.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 102 2
+       check_err $? "Single filter - did not match after delete"
+
+       tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
+
+       log_test "single mask test ($tcflags)"
+}
+
+identical_filters_test()
+{
+       # When two filters that only differ in their priority are used,
+       # one needs to be inserted into the C-TCAM. This test verifies
+       # that filters are correctly spilled to C-TCAM and that the right
+       # filter is matched
+
+       RET=0
+
+       tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
+               $tcflags dst_ip 192.0.2.2 action drop
+       tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
+               $tcflags dst_ip 192.0.2.2 action drop
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 101 1
+       check_err $? "Did not match A-TCAM filter"
+
+       tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 102 1
+       check_err $? "Did not match C-TCAM filter after A-TCAM delete"
+
+       tc filter add dev $h2 ingress protocol ip pref 3 handle 103 flower \
+               $tcflags dst_ip 192.0.2.2 action drop
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 102 2
+       check_err $? "Did not match C-TCAM filter after A-TCAM add"
+
+       tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 103 1
+       check_err $? "Did not match A-TCAM filter after C-TCAM delete"
+
+       tc filter del dev $h2 ingress protocol ip pref 3 handle 103 flower
+
+       log_test "identical filters test ($tcflags)"
+}
+
+two_masks_test()
+{
+       # When more than one mask is required, the eRP table is used. This
+       # test verifies that the eRP table is correctly allocated and used
+
+       RET=0
+
+       tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
+               $tcflags dst_ip 192.0.2.2 action drop
+       tc filter add dev $h2 ingress protocol ip pref 3 handle 103 flower \
+               $tcflags dst_ip 192.0.0.0/16 action drop
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 101 1
+       check_err $? "Two filters - did not match highest priority"
+
+       tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 103 1
+       check_err $? "Single filter - did not match"
+
+       tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
+               $tcflags dst_ip 192.0.2.0/24 action drop
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 102 1
+       check_err $? "Two filters - did not match highest priority after add"
+
+       tc filter del dev $h2 ingress protocol ip pref 3 handle 103 flower
+       tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
+
+       log_test "two masks test ($tcflags)"
+}
+
+multiple_masks_test()
+{
+       # The number of masks in a region is limited. Once the maximum
+       # number of masks has been reached filters that require new
+       # masks are spilled to the C-TCAM. This test verifies that
+       # spillage is performed correctly and that the right filter is
+       # matched
+
+       local index
+
+       RET=0
+
+       NUM_MASKS=32
+       BASE_INDEX=100
+
+       for i in $(eval echo {1..$NUM_MASKS}); do
+               index=$((BASE_INDEX - i))
+
+               tc filter add dev $h2 ingress protocol ip pref $index \
+                       handle $index \
+                       flower $tcflags dst_ip 192.0.2.2/${i} src_ip 192.0.2.1 \
+                       action drop
+
+               $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 \
+                       -B 192.0.2.2 -t ip -q
+
+               tc_check_packets "dev $h2 ingress" $index 1
+               check_err $? "$i filters - did not match highest priority (add)"
+       done
+
+       for i in $(eval echo {$NUM_MASKS..1}); do
+               index=$((BASE_INDEX - i))
+
+               $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 \
+                       -B 192.0.2.2 -t ip -q
+
+               tc_check_packets "dev $h2 ingress" $index 2
+               check_err $? "$i filters - did not match highest priority (del)"
+
+               tc filter del dev $h2 ingress protocol ip pref $index \
+                       handle $index flower
+       done
+
+       log_test "multiple masks test ($tcflags)"
+}
+
+ctcam_two_atcam_masks_test()
+{
+       RET=0
+
+       # First case: C-TCAM is disabled when there are two A-TCAM masks.
+       # We push a filter into the C-TCAM by using two identical filters
+       # as in identical_filters_test()
+
+       # Filter goes into A-TCAM
+       tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
+               $tcflags dst_ip 192.0.2.2 action drop
+       # Filter goes into C-TCAM
+       tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
+               $tcflags dst_ip 192.0.2.2 action drop
+       # Filter goes into A-TCAM
+       tc filter add dev $h2 ingress protocol ip pref 3 handle 103 flower \
+               $tcflags dst_ip 192.0.2.0/24 action drop
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 101 1
+       check_err $? "Did not match A-TCAM filter"
+
+       # Delete both A-TCAM and C-TCAM filters and make sure the remaining
+       # A-TCAM filter still works
+       tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
+       tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 103 1
+       check_err $? "Did not match A-TCAM filter"
+
+       tc filter del dev $h2 ingress protocol ip pref 3 handle 103 flower
+
+       log_test "ctcam with two atcam masks test ($tcflags)"
+}
+
+ctcam_one_atcam_mask_test()
+{
+       RET=0
+
+       # Second case: C-TCAM is disabled when there is one A-TCAM mask.
+       # The test is similar to identical_filters_test()
+
+       # Filter goes into A-TCAM
+       tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
+               $tcflags dst_ip 192.0.2.2 action drop
+       # Filter goes into C-TCAM
+       tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
+               $tcflags dst_ip 192.0.2.2 action drop
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 101 1
+       check_err $? "Did not match C-TCAM filter"
+
+       tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
+
+       $MZ $h1 -c 1 -p 64 -a $h1mac -b $h2mac -A 192.0.2.1 -B 192.0.2.2 \
+               -t ip -q
+
+       tc_check_packets "dev $h2 ingress" 102 1
+       check_err $? "Did not match A-TCAM filter"
+
+       tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
+
+       log_test "ctcam with one atcam mask test ($tcflags)"
+}
+
+ctcam_no_atcam_masks_test()
+{
+       RET=0
+
+       # Third case: C-TCAM is disabled when there are no A-TCAM masks
+       # This test exercises the code path that transitions the eRP table
+       # to its initial state after deleting the last C-TCAM mask
+
+       # Filter goes into A-TCAM
+       tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
+               $tcflags dst_ip 192.0.2.2 action drop
+       # Filter goes into C-TCAM
+       tc filter add dev $h2 ingress protocol ip pref 2 handle 102 flower \
+               $tcflags dst_ip 192.0.2.2 action drop
+
+       tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower
+       tc filter del dev $h2 ingress protocol ip pref 2 handle 102 flower
+
+       log_test "ctcam with no atcam masks test ($tcflags)"
+}
+
+ctcam_edge_cases_test()
+{
+       # When the C-TCAM is disabled after deleting the last C-TCAM
+       # mask, we want to make sure the eRP state machine is put in
+       # the correct state
+
+       ctcam_two_atcam_masks_test
+       ctcam_one_atcam_mask_test
+       ctcam_no_atcam_masks_test
+}
+
+setup_prepare()
+{
+       h1=${NETIFS[p1]}
+       h2=${NETIFS[p2]}
+       h1mac=$(mac_get $h1)
+       h2mac=$(mac_get $h2)
+
+       vrf_prepare
+
+       h1_create
+       h2_create
+}
+
+cleanup()
+{
+       pre_cleanup
+
+       h2_destroy
+       h1_destroy
+
+       vrf_cleanup
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+if ! tc_offload_check; then
+       check_err 1 "Could not test offloaded functionality"
+       log_test "mlxsw-specific tests for tc flower"
+       exit
+else
+       tcflags="skip_sw"
+       tests_run
+fi
+
+exit $EXIT_STATUS