NTB: ntb_test: Update ntb_tool DB tests

DB interface of ntb_tool driver hasn't been changed much, but
db_valid_mask DebugFS file has still been added. In this case
it's much better to test all valid DB bits instead of using
the predefined mask, which may be incorrect in general.

Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

diff --git a/tools/testing/selftests/ntb/ntb_test.sh b/tools/testing/selftests/ntb/ntb_test.sh
index a3942f31c057f9af9446d10b1060bc793f0638e6..ec2e51183f8d56754d70a171a1b6d61f7abdd2c8 100755 (executable)
--- a/tools/testing/selftests/ntb/ntb_test.sh
+++ b/tools/testing/selftests/ntb/ntb_test.sh
@@ -18,7 +18,6 @@ LIST_DEVS=FALSE
 
 DEBUGFS=${DEBUGFS-/sys/kernel/debug}
 
-DB_BITMASK=0x7FFF
 PERF_RUN_ORDER=32
 MAX_MW_SIZE=0
 RUN_DMA_TESTS=
@@ -39,7 +38,6 @@ function show_help()
        echo "be highly recommended."
        echo
        echo "Options:"
-       echo "  -b BITMASK      doorbell clear bitmask for ntb_tool"
        echo "  -C              don't cleanup ntb modules on exit"
        echo "  -d              run dma tests"
        echo "  -h              show this help message"
@@ -56,7 +54,6 @@ function parse_args()
        OPTIND=0
        while getopts "b:Cdhlm:r:p:w:" opt; do
                case "$opt" in
-               b)  DB_BITMASK=${OPTARG} ;;
                C)  DONT_CLEANUP=1 ;;
                d)  RUN_DMA_TESTS=1 ;;
                h)  show_help; exit 0 ;;
@@ -215,21 +212,30 @@ function doorbell_test()
 
        echo "Running db tests on: $(basename $LOC) / $(basename $REM)"
 
-       write_file "c $DB_BITMASK" "$REM/db"
+       DB_VALID_MASK=$(read_file "$LOC/db_valid_mask")
 
-       for ((i=1; i <= 8; i++)); do
-               let DB=$(read_file "$REM/db") || true
-               if [[ "$DB" != "$EXP" ]]; then
+       write_file "c $DB_VALID_MASK" "$REM/db"
+
+       for ((i = 0; i < 64; i++)); do
+               DB=$(read_file "$REM/db")
+               if [[ "$DB" -ne "$EXP" ]]; then
                        echo "Doorbell doesn't match expected value $EXP " \
                             "in $REM/db" >&2
                        exit -1
                fi
 
-               let "MASK=1 << ($i-1)" || true
-               let "EXP=$EXP | $MASK" || true
+               let "MASK = (1 << $i) & $DB_VALID_MASK" || true
+               let "EXP = $EXP | $MASK" || true
+
                write_file "s $MASK" "$LOC/peer_db"
        done
 
+       write_file "c $DB_VALID_MASK" "$REM/db_mask"
+       write_file $DB_VALID_MASK "$REM/db_event"
+       write_file "s $DB_VALID_MASK" "$REM/db_mask"
+
+       write_file "c $DB_VALID_MASK" "$REM/db"
+
        echo "  Passed"
 }
 
@@ -393,14 +399,15 @@ function ntb_tool_tests()
        write_file "Y" "$LOCAL_PEER_TOOL/link_event"
        write_file "Y" "$REMOTE_PEER_TOOL/link_event"
 
+       doorbell_test "$LOCAL_TOOL" "$REMOTE_TOOL"
+       doorbell_test "$REMOTE_TOOL" "$LOCAL_TOOL"
+
        for PEER_TRANS in $(ls "$LOCAL_TOOL"/peer_trans*); do
                PT=$(basename $PEER_TRANS)
                write_file $MW_SIZE "$LOCAL_TOOL/$PT"
                write_file $MW_SIZE "$REMOTE_TOOL/$PT"
        done
 
-       doorbell_test "$LOCAL_TOOL" "$REMOTE_TOOL"
-       doorbell_test "$REMOTE_TOOL" "$LOCAL_TOOL"
        scratchpad_test "$LOCAL_TOOL" "$REMOTE_TOOL"
        scratchpad_test "$REMOTE_TOOL" "$LOCAL_TOOL"