From 11ca099b52ec339b7464946db144e60399ffa344 Mon Sep 17 00:00:00 2001

From: Vishal Verma <vishal.l.verma@intel.com>

Date: Mon, 15 Aug 2022 13:22:13 -0600

Subject: [PATCH 198/217] test: add a cxl-create-region test

Add a unit test to exercise the cxl-create-region command with different

combinations of memdevs and decoders, using cxl_test based mocked

devices.

Link: https://lore.kernel.org/r/20220815192214.545800-11-vishal.l.verma@intel.com

Cc: Dan Williams <dan.j.williams@intel.com>

Reviewed-by: Dan Williams <dan.j.williams@intel.com>

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>

---

 test/cxl-create-region.sh | 125 ++++++++++++++++++++++++++++++++++++++

 test/meson.build          |   2 +

 2 files changed, 127 insertions(+)

 create mode 100644 test/cxl-create-region.sh

diff --git a/test/cxl-create-region.sh b/test/cxl-create-region.sh

new file mode 100644

index 0000000..66df38f

--- /dev/null

+++ b/test/cxl-create-region.sh

@@ -0,0 +1,125 @@

+#!/bin/bash

+# SPDX-License-Identifier: GPL-2.0

+# Copyright (C) 2022 Intel Corporation. All rights reserved.

+

+. $(dirname $0)/common

+

+rc=1

+

+set -ex

+

+trap 'err $LINENO' ERR

+

+check_prereq "jq"

+

+modprobe -r cxl_test

+modprobe cxl_test

+udevadm settle

+

+destroy_regions()

+{

+	if [[ "$*" ]]; then

+		$CXL destroy-region -f -b cxl_test "$@"

+	else

+		$CXL destroy-region -f -b cxl_test all

+	fi

+}

+

+create_x1_region()

+{

+	mem="$1"

+

+	# find a pmem capable root decoder for this mem

+	decoder=$($CXL list -b cxl_test -D -d root -m "$mem" |

+		  jq -r ".[] |

+		  select(.pmem_capable == true) |

+		  select(.nr_targets == 1) |

+		  .decoder")

+

+	if [[ ! $decoder ]]; then

+		echo "no suitable decoder found for $mem, skipping"

+		return

+	fi

+

+	# create region

+	region=$($CXL create-region -d "$decoder" -m "$mem" | jq -r ".region")

+

+	if [[ ! $region ]]; then

+		echo "create-region failed for $decoder / $mem"

+		err "$LINENO"

+	fi

+

+	# cycle disable/enable

+	$CXL disable-region --bus=cxl_test "$region"

+	$CXL enable-region --bus=cxl_test "$region"

+

+	# cycle destroying and creating the same region

+	destroy_regions "$region"

+	region=$($CXL create-region -d "$decoder" -m "$mem" | jq -r ".region")

+

+	if [[ ! $region ]]; then

+		echo "create-region failed for $decoder / $mem"

+		err "$LINENO"

+	fi

+	destroy_regions "$region"

+}

+

+create_subregions()

+{

+	slice=$((256 << 20))

+	mem="$1"

+

+	# find a pmem capable root decoder for this mem

+	decoder=$($CXL list -b cxl_test -D -d root -m "$mem" |

+		  jq -r ".[] |

+		  select(.pmem_capable == true) |

+		  select(.nr_targets == 1) |

+		  .decoder")

+

+	if [[ ! $decoder ]]; then

+		echo "no suitable decoder found for $mem, skipping"

+		return

+	fi

+

+	size="$($CXL list -m "$mem" | jq -r '.[].pmem_size')"

+	if [[ ! $size ]]; then

+		echo "$mem: unable to determine size"

+		err "$LINENO"

+	fi

+

+	num_regions=$((size / slice))

+

+	declare -a regions

+	for (( i = 0; i < num_regions; i++ )); do

+		regions[$i]=$($CXL create-region -d "$decoder" -m "$mem" -s "$slice" | jq -r ".region")

+		if [[ ! ${regions[$i]} ]]; then

+			echo "create sub-region failed for $decoder / $mem"

+			err "$LINENO"

+		fi

+		udevadm settle

+	done

+

+	echo "created $num_regions subregions:"

+	for (( i = 0; i < num_regions; i++ )); do

+		echo "${regions[$i]}"

+	done

+

+	for (( i = (num_regions - 1); i >= 0; i-- )); do

+		destroy_regions "${regions[$i]}"

+	done

+}

+

+# test reading labels directly through cxl-cli

+readarray -t mems < <("$CXL" list -b cxl_test -M | jq -r '.[].memdev')

+

+for mem in ${mems[@]}; do

+	create_x1_region "$mem"

+done

+

+# test multiple subregions under the same decoder, using slices of the same memdev

+# to test out back-to-back pmem DPA allocations on memdevs

+for mem in ${mems[@]}; do

+	create_subregions "$mem"

+done

+

+modprobe -r cxl_test

diff --git a/test/meson.build b/test/meson.build

index b382f46..5953c28 100644

--- a/test/meson.build

+++ b/test/meson.build

@@ -153,6 +153,7 @@ track_uuid = find_program('track-uuid.sh')

 cxl_topo = find_program('cxl-topology.sh')

 cxl_sysfs = find_program('cxl-region-sysfs.sh')

 cxl_labels = find_program('cxl-labels.sh')

+cxl_create_region = find_program('cxl-create-region.sh')

 tests = [

   [ 'libndctl',               libndctl,		  'ndctl' ],

@@ -180,6 +181,7 @@ tests = [

   [ 'cxl-topology.sh',	      cxl_topo,		  'cxl'   ],

   [ 'cxl-region-sysfs.sh',    cxl_sysfs,	  'cxl'   ],

   [ 'cxl-labels.sh',          cxl_labels,	  'cxl'   ],

+  [ 'cxl-create-region.sh',   cxl_create_region,  'cxl'   ],

 ]

 if get_option('destructive').enabled()

-- 

2.27.0