new file mode 100644
@@ -0,0 +1,656 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2024 Intel Corporation. All rights reserved.
+
+. "$(dirname "$0")/common"
+
+rc=77
+set -ex
+
+trap 'err $LINENO' ERR
+
+check_prereq "jq"
+
+modprobe -r cxl_test
+modprobe cxl_test
+rc=1
+
+dev_path="/sys/bus/platform/devices"
+cxl_path="/sys/bus/cxl/devices"
+
+# a test extent tag
+test_tag=dc-test-tag
+
+#
+# The test devices have 2G of non DC capacity. A single DC reagion of 1G is
+# added beyond that.
+#
+# The testing centers around 3 extents. Two are pre-existing on test load
+# called pre-existing. The other is created within this script alone called
+# base.
+
+#
+# | 2G non- | DC region (1G) |
+# | DC cap | |
+# | ... |-------------------------------------------------------|
+# | |--------| |----------| |----------| |
+# | | (base) | | (pre)- | | (pre2)- | |
+# | | | | existing | | existing | |
+
+dcsize=""
+
+base_dpa=0x80000000
+
+# base extent at dpa 2G - 64M long
+base_ext_offset=0x0
+base_ext_dpa=$(($base_dpa + $base_ext_offset))
+base_ext_length=0x4000000
+
+# pre existing extent base + 128M, 64M length
+# 0x00000088000000-0x0000008bffffff
+pre_ext_offset=0x8000000
+pre_ext_dpa=$(($base_dpa + $pre_ext_offset))
+pre_ext_length=0x4000000
+
+# pre2 existing extent base + 256M, 64M length
+# 0x00000090000000-0x00000093ffffff
+pre2_ext_offset=0x10000000
+pre2_ext_dpa=$(($base_dpa + $pre2_ext_offset))
+pre2_ext_length=0x4000000
+
+mem=""
+bus=""
+device=""
+decoder=""
+
+create_dcd_region()
+{
+ mem="$1"
+ decoder="$2"
+ reg_size_string=""
+ if [ "$3" != "" ]; then
+ reg_size_string="-s $3"
+ fi
+ dcd_partition="dc0"
+ if [ "$4" != "" ]; then
+ dcd_partition="$4"
+ fi
+
+ # create region
+ rc=$($CXL create-region -t ${dcd_partition} -d "$decoder" -m "$mem" ${reg_size_string} | jq -r ".region")
+
+ if [[ ! $rc ]]; then
+ echo "create-region failed for $decoder / $mem"
+ err "$LINENO"
+ fi
+
+ echo ${rc}
+}
+
+check_region()
+{
+ search=$1
+ region_size=$2
+
+ result=$($CXL list -r "$search" | jq -r ".[].region")
+ if [ "$result" != "$search" ]; then
+ echo "check region failed to find $search"
+ err "$LINENO"
+ fi
+
+ result=$($CXL list -r "$search" | jq -r ".[].size")
+ if [ "$result" != "$region_size" ]; then
+ echo "check region failed invalid size $result != $region_size"
+ err "$LINENO"
+ fi
+}
+
+check_not_region()
+{
+ search=$1
+
+ result=$($CXL list -r "$search" | jq -r ".[].region")
+ if [ "$result" == "$search" ]; then
+ echo "check not region failed; $search found"
+ err "$LINENO"
+ fi
+}
+
+destroy_region()
+{
+ local region=$1
+ $CXL disable-region $region
+ $CXL destroy-region $region
+}
+
+inject_extent()
+{
+ device="$1"
+ dpa="$2"
+ length="$3"
+ tag="$4"
+
+ more="0"
+ if [ "$5" != "" ]; then
+ more="1"
+ fi
+
+ echo ${dpa}:${length}:${tag}:${more} > "${dev_path}/${device}/dc_inject_extent"
+}
+
+remove_extent()
+{
+ device="$1"
+ dpa="$2"
+ length="$3"
+
+ echo ${dpa}:${length} > "${dev_path}/${device}/dc_del_extent"
+}
+
+create_dax_dev()
+{
+ reg="$1"
+
+ dax_dev=$($DAXCTL create-device -r $reg | jq -er '.[].chardev')
+
+ echo ${dax_dev}
+}
+
+fail_create_dax_dev()
+{
+ reg="$1"
+
+ set +e
+ result=$($DAXCTL create-device -r $reg)
+ set -e
+ if [ "$result" == "0" ]; then
+ echo "FAIL device created"
+ err "$LINENO"
+ fi
+}
+
+shrink_dax_dev()
+{
+ dev="$1"
+ new_size="$2"
+
+ $DAXCTL disable-device $dev
+ $DAXCTL reconfigure-device $dev -s $new_size
+ $DAXCTL enable-device $dev
+}
+
+destroy_dax_dev()
+{
+ dev="$1"
+
+ $DAXCTL disable-device $dev
+ $DAXCTL destroy-device $dev
+}
+
+check_dax_dev()
+{
+ search="$1"
+ size="$2"
+
+ result=$($DAXCTL list -d $search | jq -er '.[].chardev')
+ if [ "$result" != "$search" ]; then
+ echo "check dax device failed to find $search"
+ err "$LINENO"
+ fi
+ result=$($DAXCTL list -d $search | jq -er '.[].size')
+ if [ "$result" -ne "$size" ]; then
+ echo "check dax device failed incorrect size $result; exp $size"
+ err "$LINENO"
+ fi
+}
+
+# check that the dax device is not there.
+check_not_dax_dev()
+{
+ reg="$1"
+ search="$2"
+ result=$($DAXCTL list -r $reg -D | jq -er '.[].chardev')
+ if [ "$result" == "$search" ]; then
+ echo "FAIL found $search"
+ err "$LINENO"
+ fi
+}
+
+check_extent()
+{
+ region=$1
+ offset=$(($2))
+ length=$(($3))
+
+ result=$($CXL list -r "$region" -N | jq -r ".[].extents[] | select(.offset == ${offset}) | .length")
+ if [[ $result != $length ]]; then
+ echo "FAIL region $1 could not find extent @ $offset ($length)"
+ err "$LINENO"
+ fi
+}
+
+check_extent_cnt()
+{
+ region=$1
+ count=$(($2))
+
+ result=$($CXL list -r $region -N | jq -r '.[].extents[].offset' | wc -l)
+ if [[ $result != $count ]]; then
+ echo "FAIL region $1: found wrong number of extents $result; expect $count"
+ err "$LINENO"
+ fi
+}
+
+readarray -t memdevs < <("$CXL" list -b cxl_test -Mi | jq -r '.[].memdev')
+
+for mem in ${memdevs[@]}; do
+ dcsize=$($CXL list -m $mem | jq -r '.[].dc0_size')
+ if [ "$dcsize" == "null" ]; then
+ continue
+ fi
+ decoder=$($CXL list -b cxl_test -D -d root -m "$mem" |
+ jq -r ".[] |
+ select(.dc0_capable == true) |
+ select(.nr_targets == 1) |
+ select(.max_available_extent >= ${dcsize}) |
+ .decoder")
+ if [[ $decoder ]]; then
+ bus=`"$CXL" list -b cxl_test -m ${mem} | jq -r '.[].bus'`
+ device=$($CXL list -m $mem | jq -r '.[].host')
+ break
+ fi
+done
+
+echo "TEST: DCD test device bus:${bus} decoder:${decoder} mem:${mem} device:${device} size:${dcsize}"
+
+if [ "$decoder" == "" ] || [ "$device" == "" ] || [ "$dcsize" == "" ]; then
+ echo "No mem device/decoder found with DCD support"
+ exit 77
+fi
+
+echo ""
+echo "Test: pre-existing extent"
+echo ""
+region=$(create_dcd_region ${mem} ${decoder})
+check_region ${region} ${dcsize}
+# should contain pre-created extents
+check_extent ${region} ${pre_ext_offset} ${pre_ext_length}
+check_extent ${region} ${pre2_ext_offset} ${pre2_ext_length}
+
+
+# | 2G non- | DC region |
+# | DC cap | |
+# | ... |-------------------------------------------------------|
+# | | |----------| |----------| |
+# | | | (pre)- | | (pre2)- | |
+# | | | existing | | existing | |
+
+# Remove the pre-created test extent out from under dax device
+# stack should hold ref until dax device deleted
+echo ""
+echo "Test: Remove extent from under DAX dev"
+echo ""
+dax_dev=$(create_dax_dev ${region})
+check_extent_cnt ${region} 2
+remove_extent ${device} $pre_ext_dpa $pre_ext_length
+length="$(($pre_ext_length + $pre2_ext_length))"
+check_dax_dev ${dax_dev} $length
+check_extent_cnt ${region} 2
+destroy_dax_dev ${dax_dev}
+check_not_dax_dev ${region} ${dax_dev}
+
+# In-use extents are not released. Remove after use.
+check_extent_cnt ${region} 2
+remove_extent ${device} $pre_ext_dpa $pre_ext_length
+remove_extent ${device} $pre2_ext_dpa $pre2_ext_length
+check_extent_cnt ${region} 0
+
+echo ""
+echo "Test: Create dax device spanning 2 extents"
+echo ""
+inject_extent ${device} $pre_ext_dpa $pre_ext_length ""
+check_extent ${region} ${pre_ext_offset} ${pre_ext_length}
+inject_extent ${device} $base_ext_dpa $base_ext_length ""
+check_extent ${region} ${base_ext_offset} ${base_ext_length}
+
+# | 2G non- | DC region |
+# | DC cap | |
+# | ... |-------------------------------------------------------|
+# | |--------| |----------| |
+# | | (base) | | (pre)- | |
+# | | | | existing | |
+
+check_extent_cnt ${region} 2
+dax_dev=$(create_dax_dev ${region})
+
+echo ""
+echo "Test: dev dax is spanning sparse extents"
+echo ""
+ext_sum_length="$(($base_ext_length + $pre_ext_length))"
+check_dax_dev ${dax_dev} $ext_sum_length
+
+
+echo ""
+echo "Test: Remove extents under sparse dax device"
+echo ""
+remove_extent ${device} $base_ext_dpa $base_ext_length
+check_extent_cnt ${region} 2
+remove_extent ${device} $pre_ext_dpa $pre_ext_length
+check_extent_cnt ${region} 2
+destroy_dax_dev ${dax_dev}
+check_not_dax_dev ${region} ${dax_dev}
+
+# In-use extents are not released. Remove after use.
+check_extent_cnt ${region} 2
+remove_extent ${device} $base_ext_dpa $base_ext_length
+remove_extent ${device} $pre_ext_dpa $pre_ext_length
+check_extent_cnt ${region} 0
+
+echo ""
+echo "Test: inject without/with tag"
+echo ""
+inject_extent ${device} $pre_ext_dpa $pre_ext_length ""
+check_extent ${region} ${pre_ext_offset} ${pre_ext_length}
+inject_extent ${device} $base_ext_dpa $base_ext_length ""
+check_extent ${region} ${base_ext_offset} ${base_ext_length}
+remove_extent ${device} $base_ext_dpa $base_ext_length
+remove_extent ${device} $pre_ext_dpa $pre_ext_length
+check_extent_cnt ${region} 0
+
+
+echo ""
+echo "Test: partial extent remove"
+echo ""
+inject_extent ${device} $base_ext_dpa $base_ext_length ""
+dax_dev=$(create_dax_dev ${region})
+
+# | 2G non- | DC region |
+# | DC cap | |
+# | ... |-------------------------------------------------------|
+# | |--------| |
+# | | (base) | |
+# | | |---| |
+# Partial
+
+partial_ext_dpa="$(($base_ext_dpa + ($base_ext_length / 2)))"
+partial_ext_length="$(($base_ext_length / 2))"
+echo "Removing Partial : $partial_ext_dpa $partial_ext_length"
+remove_extent ${device} $partial_ext_dpa $partial_ext_length
+check_extent_cnt ${region} 1
+destroy_dax_dev ${dax_dev}
+check_not_dax_dev ${region} ${dax_dev}
+
+# In-use extents are not released. Remove after use.
+check_extent_cnt ${region} 1
+remove_extent ${device} $partial_ext_dpa $partial_ext_length
+check_extent_cnt ${region} 0
+
+# Test multiple extent remove
+echo ""
+echo "Test: multiple extent remove with single extent remove command"
+echo ""
+inject_extent ${device} $pre_ext_dpa $pre_ext_length ""
+inject_extent ${device} $base_ext_dpa $base_ext_length ""
+check_extent_cnt ${region} 2
+dax_dev=$(create_dax_dev ${region})
+
+# | 2G non- | DC region |
+# | DC cap | |
+# | ... |-------------------------------------------------------|
+# | |--------| |-------------------| |
+# | | (base) | | (pre)-existing | |
+# |------------------|
+# Partial
+
+partial_ext_dpa="$(($base_ext_dpa + ($base_ext_length / 2)))"
+partial_ext_length="$(($pre_ext_dpa - $base_ext_dpa))"
+echo "Removing multiple in span : $partial_ext_dpa $partial_ext_length"
+remove_extent ${device} $partial_ext_dpa $partial_ext_length
+check_extent_cnt ${region} 2
+destroy_dax_dev ${dax_dev}
+check_not_dax_dev ${region} ${dax_dev}
+
+
+echo ""
+echo "Test: Destroy region without extent removal"
+echo ""
+
+# In-use extents are not released.
+check_extent_cnt ${region} 2
+destroy_region ${region}
+check_not_region ${region}
+
+
+echo ""
+echo "Test: Destroy region with extents and dax devices"
+echo ""
+region=$(create_dcd_region ${mem} ${decoder})
+check_region ${region} ${dcsize}
+check_extent_cnt ${region} 0
+inject_extent ${device} $pre_ext_dpa $pre_ext_length ""
+
+# | 2G non- | DC region |
+# | DC cap | |
+# | ... |-------------------------------------------------------|
+# | | |----------| |
+# | | | (pre)- | |
+# | | | existing | |
+
+check_extent_cnt ${region} 1
+dax_dev=$(create_dax_dev ${region})
+destroy_region ${region}
+check_not_region ${region}
+
+echo ""
+echo "Test: Fail sparse dax dev creation without space"
+echo ""
+region=$(create_dcd_region ${mem} ${decoder})
+check_region ${region} ${dcsize}
+inject_extent ${device} $pre_ext_dpa $pre_ext_length ""
+
+# | 2G non- | DC region |
+# | DC cap | |
+# | ... |-------------------------------------------------------|
+# | | |-------------------| |
+# | | | (pre)-existing | |
+
+check_extent_cnt ${region} 1
+
+# | | | dax0.1 | |
+
+dax_dev=$(create_dax_dev ${region})
+check_dax_dev ${dax_dev} $pre_ext_length
+fail_create_dax_dev ${region}
+
+echo ""
+echo "Test: Resize sparse dax device"
+echo ""
+
+# Shrink
+# | | | dax0.1 | |
+resize_ext_length=$(($pre_ext_length / 2))
+shrink_dax_dev ${dax_dev} $resize_ext_length
+check_dax_dev ${dax_dev} $resize_ext_length
+
+# Fill
+# | | | dax0.1 | dax0.2 | |
+dax_dev=$(create_dax_dev ${region})
+check_dax_dev ${dax_dev} $resize_ext_length
+destroy_region ${region}
+check_not_region ${region}
+
+
+# 2 extent
+# create dax dev
+# resize into 1st extent
+# create dev on rest of 1st and all of second
+# Ensure both devices are correct
+
+echo ""
+echo "Test: Resize sparse dax device across extents"
+echo ""
+region=$(create_dcd_region ${mem} ${decoder})
+check_region ${region} ${dcsize}
+inject_extent ${device} $pre_ext_dpa $pre_ext_length ""
+inject_extent ${device} $base_ext_dpa $base_ext_length ""
+
+# | 2G non- | DC region |
+# | DC cap | |
+# | ... |-------------------------------------------------------|
+# | |--------| |-------------------| |
+# | | (base) | | (pre)-existing | |
+
+check_extent_cnt ${region} 2
+dax_dev=$(create_dax_dev ${region})
+ext_sum_length="$(($base_ext_length + $pre_ext_length))"
+
+# | | dax0.1 | | dax0.1 | |
+
+check_dax_dev ${dax_dev} $ext_sum_length
+resize_ext_length=33554432 # 32MB
+
+# | | D1 | |
+
+shrink_dax_dev ${dax_dev} $resize_ext_length
+check_dax_dev ${dax_dev} $resize_ext_length
+
+# | | D1 | D2| | dax0.2 | |
+
+dax_dev=$(create_dax_dev ${region})
+remainder_length=$((ext_sum_length - $resize_ext_length))
+check_dax_dev ${dax_dev} $remainder_length
+
+# | | D1 | D2| | dax0.2 | |
+
+remainder_length=$((remainder_length / 2))
+shrink_dax_dev ${dax_dev} $remainder_length
+check_dax_dev ${dax_dev} $remainder_length
+
+# | | D1 | D2| | dax0.2 | dax0.3 | |
+
+dax_dev=$(create_dax_dev ${region})
+check_dax_dev ${dax_dev} $remainder_length
+destroy_region ${region}
+check_not_region ${region}
+
+
+echo ""
+echo "Test: Rejecting overlapping extents"
+echo ""
+
+region=$(create_dcd_region ${mem} ${decoder})
+check_region ${region} ${dcsize}
+inject_extent ${device} $pre_ext_dpa $pre_ext_length ""
+
+# | 2G non- | DC region |
+# | DC cap | |
+# | ... |-------------------------------------------------------|
+# | | |-------------------| |
+# | | | (pre)-existing | |
+
+check_extent_cnt ${region} 1
+
+# Attempt overlapping extent
+#
+# | | |-----------------| |
+# | | | overlapping | |
+
+partial_ext_dpa="$(($base_ext_dpa + ($pre_ext_dpa / 2)))"
+partial_ext_length=$pre_ext_length
+inject_extent ${device} $partial_ext_dpa $partial_ext_length ""
+
+# Should only see the original ext
+check_extent_cnt ${region} 1
+destroy_region ${region}
+check_not_region ${region}
+
+
+echo ""
+echo "Test: create 2 regions in the same DC partition"
+echo ""
+region_size=$(($dcsize / 2))
+region=$(create_dcd_region ${mem} ${decoder} ${region_size} dc1)
+check_region ${region} ${region_size}
+
+region_two=$(create_dcd_region ${mem} ${decoder} ${region_size} dc1)
+check_region ${region_two} ${region_size}
+
+destroy_region ${region_two}
+check_not_region ${region_two}
+destroy_region ${region}
+check_not_region ${region}
+
+
+echo ""
+echo "Test: More bit"
+echo ""
+region=$(create_dcd_region ${mem} ${decoder})
+check_region ${region} ${dcsize}
+inject_extent ${device} $pre_ext_dpa $pre_ext_length "" 1
+# More bit should hold off surfacing extent until the more bit is 0
+check_extent_cnt ${region} 0
+inject_extent ${device} $base_ext_dpa $base_ext_length ""
+check_extent_cnt ${region} 2
+destroy_region ${region}
+check_not_region ${region}
+
+
+# Create a new region for driver tests
+region=$(create_dcd_region ${mem} ${decoder})
+
+echo ""
+echo "Test: driver remove tear down"
+echo ""
+check_region ${region} ${dcsize}
+inject_extent ${device} $pre_ext_dpa $pre_ext_length ""
+check_extent ${region} ${pre_ext_offset} ${pre_ext_length}
+dax_dev=$(create_dax_dev ${region})
+# remove driver releases extents
+modprobe -r dax_cxl
+check_extent_cnt ${region} 0
+
+# leave region up, driver removed.
+echo ""
+echo "Test: no driver inject ok"
+echo ""
+check_region ${region} ${dcsize}
+inject_extent ${device} $pre_ext_dpa $pre_ext_length ""
+check_extent_cnt ${region} 1
+modprobe dax_cxl
+check_extent_cnt ${region} 1
+
+destroy_region ${region}
+check_not_region ${region}
+
+
+# Test event reporting
+# results expected
+num_dcd_events_expected=2
+
+echo "Test: Prep event trace"
+echo "" > /sys/kernel/tracing/trace
+echo 1 > /sys/kernel/tracing/events/cxl/enable
+echo 1 > /sys/kernel/tracing/tracing_on
+
+inject_extent ${device} $base_ext_dpa $base_ext_length ""
+remove_extent ${device} $base_ext_dpa $base_ext_length
+
+echo 0 > /sys/kernel/tracing/tracing_on
+
+echo "Test: Events seen"
+trace_out=$(cat /sys/kernel/tracing/trace)
+
+# Look for DCD events
+num_dcd_events=$(grep -c "cxl_dynamic_capacity" <<< "${trace_out}")
+echo " LOG (Expected) : (Found)"
+echo " DCD events ($num_dcd_events_expected) : $num_dcd_events"
+
+if [ "$num_dcd_events" -ne $num_dcd_events_expected ]; then
+ err "$LINENO"
+fi
+
+modprobe -r cxl_test
+
+check_dmesg "$LINENO"
+
+exit 0
@@ -161,6 +161,7 @@ cxl_sanitize = find_program('cxl-sanitize.sh')
cxl_destroy_region = find_program('cxl-destroy-region.sh')
cxl_qos_class = find_program('cxl-qos-class.sh')
cxl_poison = find_program('cxl-poison.sh')
+cxl_dcd = find_program('cxl-dcd.sh')
tests = [
[ 'libndctl', libndctl, 'ndctl' ],
@@ -194,6 +195,7 @@ tests = [
[ 'cxl-destroy-region.sh', cxl_destroy_region, 'cxl' ],
[ 'cxl-qos-class.sh', cxl_qos_class, 'cxl' ],
[ 'cxl-poison.sh', cxl_poison, 'cxl' ],
+ [ 'cxl-dcd.sh', cxl_dcd, 'cxl' ],
]
if get_option('destructive').enabled()
cxl_test provides a good way to ensure quick smoke and regression testing. The complexity of DCD and the new sparse DAX regions required to use them benefits greatly with a series of smoke tests. The only part of the kernel stack which must be bypassed is the actual irq of DCD events. However, the event processing itself can be tested via cxl_test calling directly the event processing function directly. In this way the rest of the stack; management of sparse regions, the extent device lifetimes, and the dax device operations can be tested. Add Dynamic Capacity Device tests for kernels which have DCD support in cxl_test. Signed-off-by: Ira Weiny <ira.weiny@intel.com> --- Changes; [iweiny: remove tag injection from test] [iweiny: add test for 2 regions in 1 DCD partition] [iweiny: better document region/extent layout expected for each test] [iweiny: Add more bit support and test] [iweiny: Enhance region check to look at the region size.] [iweiny: test allow create region on different dc partitions: default dc0] [iweiny: fix pre-existing extent comments] [iweiny: use new extent output from ndctl to check extents] [iweiny: fix returning the region name from create_dcd_region] [iweiny: add tag testing] --- test/cxl-dcd.sh | 656 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ test/meson.build | 2 + 2 files changed, 658 insertions(+)