[NDCTL PATCH v4 4/4] ndctl: add test for qos_class in cxl-topology.sh

[Dave Jiang <dave.jiang@intel.com>]

Add tests in cxl-topology.sh to verify qos_class are set with the fake
qos_class create by the kernel.  Root decoders should have qos_class
attribute set. Memory devices should have ram_qos_class or pmem_qos_class
set depending on which partitions are valid.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
 test/common          |  4 ++++
 test/cxl-topology.sh | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/test/common b/test/common
index f1023ef20f7e..5694820c7adc 100644
--- a/test/common
+++ b/test/common
@@ -150,3 +150,7 @@ check_dmesg()
 	grep -q "Call Trace" <<< $log && err $1
 	true
 }
+
+
+# CXL COMMON
+TEST_QOS_CLASS=42
diff --git a/test/cxl-topology.sh b/test/cxl-topology.sh
index e8b9f56543b5..d11a8cf11965 100644
--- a/test/cxl-topology.sh
+++ b/test/cxl-topology.sh
@@ -2,6 +2,45 @@
 # SPDX-License-Identifier: GPL-2.0
 # Copyright (C) 2022 Intel Corporation. All rights reserved.
 
+check_qos_decoders () {
+	# check root decoders have expected fake qos_class
+	# also make sure the number of root decoders equal to the number
+	# with qos_class found
+	json=$($CXL list -b cxl_test -D -d root)
+	decoders=$(echo "$json" | jq length)
+	count=0
+	while read -r qos_class
+	do
+		((qos_class == TEST_QOS_CLASS)) || err "$LINENO"
+		count=$((count+1))
+	done <<< "$(echo "$json" | jq -r '.[] | .qos_class')"
+
+	((count == decoders)) || err "$LINENO";
+}
+
+check_qos_memdevs () {
+	# Check that memdevs that expose ram_qos_class or pmem_qos_class have
+	# expected fake value programmed.
+	json=$(cxl list -b cxl_test -M)
+	readarray -t lines < <(jq ".[] | .ram_size, .pmem_size, .ram_qos_class, .pmem_qos_class" <<<"$json")
+	for (( i = 0; i < ${#lines[@]}; i += 4 ))
+	do
+		ram_size=${lines[i]}
+		pmem_size=${lines[i+1]}
+		ram_qos_class=${lines[i+2]}
+		pmem_qos_class=${lines[i+3]}
+
+		if [[ "$ram_size" != null ]]
+		then
+			((ram_qos_class == TEST_QOS_CLASS)) || err "$LINENO"
+		fi
+		if [[ "$pmem_size" != null ]]
+		then
+			((pmem_qos_class == TEST_QOS_CLASS)) || err "$LINENO"
+		fi
+	done
+}
+
 . $(dirname $0)/common
 
 rc=77
@@ -121,6 +160,8 @@ if (( bridges == 3 )); then
 	((count == 1)) || err "$LINENO"
 fi
 
+check_min_kver "6.9" && check_qos_decoders
+
 # check that all 8 or 10 cxl_test memdevs are enabled by default and have a
 # pmem size of 256M, or 1G
 json=$($CXL list -b cxl_test -M)
@@ -128,6 +169,7 @@ count=$(jq "map(select(.pmem_size == $pmem_size)) | length" <<< $json)
 ((bridges == 2 && count == 8 || bridges == 3 && count == 10 ||
   bridges == 4 && count == 11)) || err "$LINENO"
 
+check_min_kver "6.9" && check_qos_memdevs
 
 # check that switch ports disappear after all of their memdevs have been
 # disabled, and return when the memdevs are enabled.
-- 
2.43.0