[ndctl PATCH 6/6] cxl/test: Validate switch port settings in cxl-region-sysfs.sh

[Dan Williams <dan.j.williams@intel.com>]

A recent kernel fix to add the missing update of endpoint decoder HPA range
settings regressed switch decoder HPA range settings. Add validation for
switch port settings to avoid regressions like that going forward.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 test/cxl-region-sysfs.sh |   32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/test/cxl-region-sysfs.sh b/test/cxl-region-sysfs.sh
index 110e03709e39..ae0f55653814 100644
--- a/test/cxl-region-sysfs.sh
+++ b/test/cxl-region-sysfs.sh
@@ -112,6 +112,38 @@ do
 	[ $res -ne $region_base ] && err "$LINENO: decoder: $i base: $res region_base: $region_base"
 done
 
+# validate all switch decoders have the correct settings
+nr_switches=$((nr_targets/2))
+nr_host_bridges=$((nr_switches/2))
+nr_switch_decoders=$((nr_switches + nr_host_bridges))
+
+json=$($CXL list -D -r $region -d switch)
+readarray -t switch_decoders < <(echo $json | jq -r ".[].decoder")
+
+[ ${#switch_decoders[@]} -ne $nr_switch_decoders ] && err \
+"$LINENO: expected $nr_switch_decoders got ${#switch_decoders[@]} switch decoders"
+
+for i in ${switch_decoders[@]}
+do
+	decoder=$(echo $json | jq -r ".[] | select(.decoder == \"$i\")")
+	id=${i#decoder}
+	port_id=${id%.*}
+	depth=$($CXL list -p $port_id -S | jq -r ".[].depth")
+	iw=$(echo $decoder | jq -r ".interleave_ways")
+	ig=$(echo $decoder | jq -r ".interleave_granularity")
+
+	[ $iw -ne 2 ] && err "$LINENO: decoder: $i iw: $iw targets: 2"
+	[ $ig -ne $((r_ig << depth)) ] && err \
+	"$LINENO: decoder: $i ig: $ig switch_ig: $((r_ig << depth))"
+
+	res=$(echo $decoder | jq -r ".resource")
+	sz=$(echo $decoder | jq -r ".size")
+	[ $sz -ne $region_size ] && err \
+	"$LINENO: decoder: $i sz: $sz region_size: $region_size"
+	[ $res -ne $region_base ] && err \
+	"$LINENO: decoder: $i base: $res region_base: $region_base"
+done
+
 # walk up the topology and commit all decoders
 echo 1 > /sys/bus/cxl/devices/$region/commit