From bcc9897b38be91df38f81fb3105d2351f7941377 Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@intel.com>
Date: Fri, 5 Aug 2022 13:38:26 -0700
Subject: [PATCH 206/217] cxl/test: Validate switch port settings in
 cxl-region-sysfs.sh

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.

Link: https://lore.kernel.org/r/165973190625.1528532.12244196912617964754.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@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 110e037..ae0f556 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
 
-- 
2.27.0