tests: estbalish drv_ prefix

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

tests/drv_hangman

@@ -0,0 +1,70 @@
+#!/bin/bash
+#
+# Testcase: Simulate gpu hang
+#
+# This check uses the stop_rings facility to exercise the gpu hang code.
+# by reading /sys/kernel/debug/dri/0/i915_emon_status too quickly
+#
+
+SOURCE_DIR="$( dirname "${BASH_SOURCE[0]}" )"
+. $SOURCE_DIR/drm_lib.sh
+
+oldpath=`pwd`
+
+cd $i915_dfs_path
+
+if [ ! -f i915_ring_stop ] ; then
+	echo "kernel doesn't support ring stopping"
+	exit 77
+fi
+
+function check_iface {
+    dir="$1"
+    file="$2"
+    mandatory="$3"
+
+    [ -z "$dir" ] && return
+
+    path="$dir/$file"
+    echo checking ${path}
+
+    if [ ! -f "$path" ] ; then
+	if [  $mandatory != 0 ] ; then
+	    echo "'${path}' not found";
+	    exit 1;
+	else
+	    echo "${path} not mandatory";
+	    return;
+	fi
+    fi
+
+    if cat "$path" | grep -v "no error state collected" > /dev/null ; then
+	echo "gpu hang detected"
+	exit 2
+    fi
+
+    echo 0xf > i915_ring_stop
+    echo "rings stopped"
+
+    (cd $oldpath; $SOURCE_DIR/gem_exec_big) > /dev/null
+
+    if cat "$path" | grep -v "no error state collected" > /dev/null ; then
+	echo "gpu hang correctly detected"
+    else
+	echo "gpu hang not detected"
+	exit 3
+    fi
+
+# clear error state
+    echo > "$path"
+
+    if cat "$path" | grep -v "no error state collected" > /dev/null ; then
+	echo "gpu hang still present"
+	exit 4
+    fi
+}
+
+check_iface "$i915_dfs_path" i915_error_state 1
+check_iface "$i915_sfs_path" error 0
+
+exit 0