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From 11ca099b52ec339b7464946db144e60399ffa344 Mon Sep 17 00:00:00 2001
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From: Vishal Verma <vishal.l.verma@intel.com>
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Date: Mon, 15 Aug 2022 13:22:13 -0600
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Subject: [PATCH 198/217] test: add a cxl-create-region test
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Add a unit test to exercise the cxl-create-region command with different
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combinations of memdevs and decoders, using cxl_test based mocked
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devices.
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Link: https://lore.kernel.org/r/20220815192214.545800-11-vishal.l.verma@intel.com
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Cc: Dan Williams <dan.j.williams@intel.com>
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Reviewed-by: Dan Williams <dan.j.williams@intel.com>
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Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
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---
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test/cxl-create-region.sh | 125 ++++++++++++++++++++++++++++++++++++++
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test/meson.build | 2 +
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2 files changed, 127 insertions(+)
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create mode 100644 test/cxl-create-region.sh
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diff --git a/test/cxl-create-region.sh b/test/cxl-create-region.sh
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new file mode 100644
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index 0000000..66df38f
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--- /dev/null
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+++ b/test/cxl-create-region.sh
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@@ -0,0 +1,125 @@
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+#!/bin/bash
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+# SPDX-License-Identifier: GPL-2.0
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+# Copyright (C) 2022 Intel Corporation. All rights reserved.
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+
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+. $(dirname $0)/common
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+
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+rc=1
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+
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+set -ex
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+
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+trap 'err $LINENO' ERR
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+
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+check_prereq "jq"
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+
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+modprobe -r cxl_test
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+modprobe cxl_test
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+udevadm settle
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+
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+destroy_regions()
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+{
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+ if [[ "$*" ]]; then
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+ $CXL destroy-region -f -b cxl_test "$@"
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+ else
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+ $CXL destroy-region -f -b cxl_test all
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+ fi
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+}
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+
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+create_x1_region()
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+{
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+ mem="$1"
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+
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+ # find a pmem capable root decoder for this mem
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+ decoder=$($CXL list -b cxl_test -D -d root -m "$mem" |
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+ jq -r ".[] |
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+ select(.pmem_capable == true) |
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+ select(.nr_targets == 1) |
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+ .decoder")
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+
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+ if [[ ! $decoder ]]; then
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+ echo "no suitable decoder found for $mem, skipping"
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+ return
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+ fi
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+
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+ # create region
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+ region=$($CXL create-region -d "$decoder" -m "$mem" | jq -r ".region")
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+
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+ if [[ ! $region ]]; then
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+ echo "create-region failed for $decoder / $mem"
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+ err "$LINENO"
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+ fi
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+
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+ # cycle disable/enable
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+ $CXL disable-region --bus=cxl_test "$region"
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+ $CXL enable-region --bus=cxl_test "$region"
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+
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+ # cycle destroying and creating the same region
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+ destroy_regions "$region"
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+ region=$($CXL create-region -d "$decoder" -m "$mem" | jq -r ".region")
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+
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+ if [[ ! $region ]]; then
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+ echo "create-region failed for $decoder / $mem"
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+ err "$LINENO"
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+ fi
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+ destroy_regions "$region"
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+}
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+
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+create_subregions()
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+{
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+ slice=$((256 << 20))
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+ mem="$1"
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+
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+ # find a pmem capable root decoder for this mem
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+ decoder=$($CXL list -b cxl_test -D -d root -m "$mem" |
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+ jq -r ".[] |
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+ select(.pmem_capable == true) |
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+ select(.nr_targets == 1) |
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+ .decoder")
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+
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+ if [[ ! $decoder ]]; then
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+ echo "no suitable decoder found for $mem, skipping"
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+ return
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+ fi
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+
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+ size="$($CXL list -m "$mem" | jq -r '.[].pmem_size')"
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+ if [[ ! $size ]]; then
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+ echo "$mem: unable to determine size"
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+ err "$LINENO"
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+ fi
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+
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+ num_regions=$((size / slice))
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+
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+ declare -a regions
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+ for (( i = 0; i < num_regions; i++ )); do
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+ regions[$i]=$($CXL create-region -d "$decoder" -m "$mem" -s "$slice" | jq -r ".region")
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+ if [[ ! ${regions[$i]} ]]; then
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+ echo "create sub-region failed for $decoder / $mem"
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+ err "$LINENO"
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+ fi
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+ udevadm settle
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+ done
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+
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+ echo "created $num_regions subregions:"
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+ for (( i = 0; i < num_regions; i++ )); do
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+ echo "${regions[$i]}"
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+ done
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+
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+ for (( i = (num_regions - 1); i >= 0; i-- )); do
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+ destroy_regions "${regions[$i]}"
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+ done
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+}
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+
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+# test reading labels directly through cxl-cli
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+readarray -t mems < <("$CXL" list -b cxl_test -M | jq -r '.[].memdev')
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+
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+for mem in ${mems[@]}; do
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+ create_x1_region "$mem"
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+done
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+
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+# test multiple subregions under the same decoder, using slices of the same memdev
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+# to test out back-to-back pmem DPA allocations on memdevs
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+for mem in ${mems[@]}; do
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+ create_subregions "$mem"
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+done
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+
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+modprobe -r cxl_test
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diff --git a/test/meson.build b/test/meson.build
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index b382f46..5953c28 100644
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--- a/test/meson.build
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+++ b/test/meson.build
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@@ -153,6 +153,7 @@ track_uuid = find_program('track-uuid.sh')
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cxl_topo = find_program('cxl-topology.sh')
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cxl_sysfs = find_program('cxl-region-sysfs.sh')
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cxl_labels = find_program('cxl-labels.sh')
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+cxl_create_region = find_program('cxl-create-region.sh')
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tests = [
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[ 'libndctl', libndctl, 'ndctl' ],
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@@ -180,6 +181,7 @@ tests = [
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[ 'cxl-topology.sh', cxl_topo, 'cxl' ],
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[ 'cxl-region-sysfs.sh', cxl_sysfs, 'cxl' ],
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[ 'cxl-labels.sh', cxl_labels, 'cxl' ],
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+ [ 'cxl-create-region.sh', cxl_create_region, 'cxl' ],
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]
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if get_option('destructive').enabled()
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--
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2.27.0
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