selftest: netdevsim: Add devlink port shared/max tx rate test

Test verifies that netdevsim VFs can set and retrieve shared/max tx
rate through new devlink API.

Co-developed-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
index c654be0e8300fb6170c1a4837aa1241bbc7c0ca3..05dcefc054d1afb586ceb99515f70e78a3cd8bcd 100755 (executable)
--- a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
+++ b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
@@ -516,6 +516,45 @@ rate_leafs_get()
               '.[] | to_entries | .[] | select(.value.type == "leaf") | .key | select(contains("'$handle'"))'
 }
 
+rate_attr_set()
+{
+       local handle=$1
+       local name=$2
+       local value=$3
+       local units=$4
+
+       devlink port function rate set $handle $name $value$units
+}
+
+rate_attr_get()
+{
+       local handle=$1
+       local name=$2
+
+       cmd_jq "devlink port function rate show $handle -j" '.[][].'$name
+}
+
+rate_attr_tx_rate_check()
+{
+       local handle=$1
+       local name=$2
+       local rate=$3
+       local debug_file=$4
+
+       rate_attr_set $handle $name $rate mbit
+       check_err $? "Failed to set $name value"
+
+       local debug_value=$(cat $debug_file)
+       check_err $? "Failed to read $name value from debugfs"
+       [ "$debug_value" == "$rate" ]
+       check_err $? "Unexpected $name debug value $debug_value != $rate"
+
+       local api_value=$(( $(rate_attr_get $handle $name) * 8 / 1000000 ))
+       check_err $? "Failed to get $name attr value"
+       [ "$api_value" == "$rate" ]
+       check_err $? "Unexpected $name attr value $api_value != $rate"
+}
+
 rate_test()
 {
        RET=0
@@ -527,6 +566,22 @@ rate_test()
        [ "$num_leafs" == "$VF_COUNT" ]
        check_err $? "Expected $VF_COUNT rate leafs but got $num_leafs"
 
+       rate=10
+       for r_obj in $leafs
+       do
+               rate_attr_tx_rate_check $r_obj tx_share $rate \
+                       $DEBUGFS_DIR/ports/${r_obj##*/}/tx_share
+               rate=$(($rate+10))
+       done
+
+       rate=100
+       for r_obj in $leafs
+       do
+               rate_attr_tx_rate_check $r_obj tx_max $rate \
+                       $DEBUGFS_DIR/ports/${r_obj##*/}/tx_max
+               rate=$(($rate+100))
+       done
+
        log_test "rate test"
 }