Message-ID: <20240920175842.388781-1-quic_wasimn@quicinc.com>
Date: Fri, 20 Sep 2024 23:28:42 +0530
From: Wasim Nazir <quic_wasimn@...cinc.com>
To: Shuah Khan <shuah@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>
Cc: linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-remoteproc@...r.kernel.org,
        Wasim Nazir <quic_wasimn@...cinc.com>
Subject: [PATCH] selftest: remoteproc: Add basic test for start/stop sequence

Add new basic remoteproc test that check start/stop
sequence of all subsystems available.

diff --git a/MAINTAINERS b/MAINTAINERS
index e062b5328341..aff76edc4242 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18225,6 +18225,7 @@ F:	Documentation/staging/remoteproc.rst
 F:	drivers/remoteproc/
 F:	include/linux/remoteproc.h
 F:	include/linux/remoteproc/
+F:	tools/testing/selftests/remoteproc/

 REMOTE PROCESSOR MESSAGING (RPMSG) SUBSYSTEM
 M:	Bjorn Andersson <andersson@...nel.org>
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 697f13bbbc32..31db0311efdc 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -68,6 +68,7 @@ TARGETS += proc
 TARGETS += pstore
 TARGETS += ptrace
 TARGETS += openat2
+TARGETS += remoteproc
 TARGETS += resctrl
 TARGETS += riscv
 TARGETS += rlimits
diff --git a/tools/testing/selftests/remoteproc/Makefile b/tools/testing/selftests/remoteproc/Makefile
new file mode 100644
index 000000000000..a84b3934fd36
--- /dev/null
+++ b/tools/testing/selftests/remoteproc/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+TEST_PROGS := remoteproc_test.sh
+
+include ../lib.mk
diff --git a/tools/testing/selftests/remoteproc/config b/tools/testing/selftests/remoteproc/config
new file mode 100644
index 000000000000..a5c237d2f3b4
--- /dev/null
+++ b/tools/testing/selftests/remoteproc/config
@@ -0,0 +1 @@
+CONFIG_REMOTEPROC=y
diff --git a/tools/testing/selftests/remoteproc/remoteproc_test.sh b/tools/testing/selftests/remoteproc/remoteproc_test.sh
new file mode 100644
index 000000000000..88c8f15d8406
--- /dev/null
+++ b/tools/testing/selftests/remoteproc/remoteproc_test.sh
@@ -0,0 +1,165 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
+#
+
+DIR="$(dirname $(readlink -f "$0"))"
+
+KTAP_HELPERS="${DIR}/../kselftest/ktap_helpers.sh"
+if [ -e "$KTAP_HELPERS" ]; then
+    source "$KTAP_HELPERS"
+else
+    echo -n "1..0 # SKIP $KTAP_HELPERS file not found"
+	exit 4
+fi
+
+RPROC_SYS=/sys/class/remoteproc
+RPROC_SEQ_SLEEP=5
+rproc_ss_files=
+num_tests=0
+test_err=0
+
+check_error() {
+	if [ $? -ne 0 ]; then
+		test_err=$((test_err+1))
+		ktap_print_msg "$@"
+	fi
+}
+
+rproc_seq_test_ss_one() {
+	ss=$1
+	rproc=${RPROC_SYS}/$ss
+	rproc_name=$(cat $rproc/name)
+	rproc_state=$(cat $rproc/state)
+	rproc_ssr=$(cat $rproc/recovery)
+	ktap_print_msg "Testing rproc sequence for $rproc_name"
+
+	# Reset test_err value
+	test_err=0
+	if [ "$rproc_ssr" != "enabled" ]; then
+		echo enabled > $rproc/recovery
+		check_error "$rproc_name SSR-enabled failed"
+	fi
+
+	if [ "$rproc_state" != "running" ]; then
+		echo start > "$rproc/state"
+		check_error "$rproc_name state-start failed"
+
+		sleep ${RPROC_SEQ_SLEEP}
+
+		echo stop > "$rproc/state"
+		check_error "$rproc_name state-stop failed"
+	else
+		echo stop > "$rproc/state"
+		check_error "$rproc_name state-stop failed"
+
+		sleep ${RPROC_SEQ_SLEEP}
+
+		echo start > "$rproc/state"
+		check_error "$rproc_name state-start failed"
+	fi
+
+	if [ $test_err -ne 0 ]; then
+		ktap_test_fail "$rproc_name"
+	else
+		ktap_test_pass "$rproc_name"
+	fi
+}
+
+rproc_seq_test_all_ss() {
+	# Declare an array to save initial states of each ss
+	org_ss_to_state=""
+
+	# Reset test_err value
+	test_err=0
+
+	for ss in ${rproc_ss_files}; do
+		rproc=${RPROC_SYS}/$ss
+		rproc_name=$(cat $rproc/name)
+		rproc_ssr=$(cat $rproc/recovery)
+
+		# Enable SSR-recovery support
+		if [ "$rproc_ssr" != "enabled" ]; then
+			echo enabled > $rproc/recovery
+			check_error "$rproc_name SSR-enabled failed"
+		fi
+	done
+
+	for ss in ${rproc_ss_files}; do
+		rproc=${RPROC_SYS}/$ss
+		rproc_name=$(cat $rproc/name)
+		rproc_state=$(cat $rproc/state)
+
+		# Save initial states for each ss
+		org_ss_to_state="$org_ss_to_state $rproc_state"
+
+		# Initiate start/stop sequence
+		if [ "$rproc_state" != "running" ]; then
+			echo start > "$rproc/state"
+			check_error "$rproc_name state-start failed"
+		else
+			echo stop > "$rproc/state"
+			check_error "$rproc_name state-stop failed"
+		fi
+		sleep ${RPROC_SEQ_SLEEP}
+	done
+
+	index=1
+	for ss in ${rproc_ss_files}; do
+		rproc=${RPROC_SYS}/$ss
+		rproc_name=$(cat $rproc/name)
+		rproc_state=$(cat $rproc/state)
+
+		ss_state=$(echo $org_ss_to_state | cut -d' ' -f$index)
+		# Terminate start/stop sequence
+		if [ "$ss_state" != "running" ]; then
+			echo stop > "$rproc/state"
+			check_error "$rproc_name state-stop failed"
+		else
+			echo start > "$rproc/state"
+			check_error "$rproc_name state-start failed"
+		fi
+		index=$((index+1))
+		sleep ${RPROC_SEQ_SLEEP}
+	done
+
+	if [ $test_err -ne 0 ]; then
+		ktap_test_fail "for any of $rproc_ss_files"
+	else
+		ktap_test_pass "for all $rproc_ss_files"
+	fi
+}
+
+ktap_print_header
+
+if [[ ! -d "${RPROC_SYS}" ]]; then
+	ktap_skip_all "${RPROC_SYS} doesn't exist."
+	exit "${KSFT_SKIP}"
+fi
+
+rproc_ss_files=$(find ${RPROC_SYS}/remoteproc* -maxdepth 1 -exec basename {} \;)
+num_tests=$(echo ${rproc_ss_files} | wc -w)
+if [[ "${num_tests}" -eq 0 ]]; then
+	ktap_skip_all "${RPROC_SYS}/remoteproc* doesn't exist."
+	exit "${KSFT_SKIP}"
+fi
+
+# Total tests will be:
+# 1) Seq tests for each subsystem sequencially
+# 2) Seq tests for all subsystems concurrently
+num_tests=$((num_tests+1))
+
+ktap_set_plan "${num_tests}"
+
+# Test 1
+ktap_print_msg "Testing rproc up/down sequence for each subsystem sequencially"
+for ss in ${rproc_ss_files}; do
+	rproc_seq_test_ss_one $ss
+done
+
+# Test 2
+ktap_print_msg "Testing rproc up/down sequence for all subsystems concurrently"
+rproc_seq_test_all_ss
+
+ktap_finished
--
2.46.1

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