Re: [ndctl PATCH 14/15] cxl/test: Extend cxl-topology.sh for a single root-port host-bridge

[Alison Schofield <alison.schofield@intel.com>]

On Sun, Nov 06, 2022 at 03:48:07PM -0800, Dan Williams wrote:
> A recent extension of cxl_test adds 2 memory devices attached through a
> switch to a single ported host-bridge to reproduce a bug report.
> 
> Reported-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Link: http://lore.kernel.org/r/20221010172057.00001559@huawei.com
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Tested-by: Alison Schofield <alison.schofield@intel.com>

> ---
>  test/cxl-topology.sh |   48 +++++++++++++++++++++++++++++-------------------
>  1 file changed, 29 insertions(+), 19 deletions(-)
> 
> diff --git a/test/cxl-topology.sh b/test/cxl-topology.sh
> index 1f15d29f0600..f1e0a2b01e98 100644
> --- a/test/cxl-topology.sh
> +++ b/test/cxl-topology.sh
> @@ -29,27 +29,30 @@ count=$(jq "length" <<< $json)
>  root=$(jq -r ".[] | .bus" <<< $json)
>  
>  
> -# validate 2 host bridges under a root port
> +# validate 2 or 3 host bridges under a root port
>  port_sort="sort_by(.port | .[4:] | tonumber)"
>  json=$($CXL list -b cxl_test -BP)
>  count=$(jq ".[] | .[\"ports:$root\"] | length" <<< $json)
> -((count == 2)) || err "$LINENO"
> +((count == 2)) || ((count == 3)) || err "$LINENO"
> +bridges=$count
>  
>  bridge[0]=$(jq -r ".[] | .[\"ports:$root\"] | $port_sort | .[0].port" <<< $json)
>  bridge[1]=$(jq -r ".[] | .[\"ports:$root\"] | $port_sort | .[1].port" <<< $json)
> +((bridges > 2)) && bridge[2]=$(jq -r ".[] | .[\"ports:$root\"] | $port_sort | .[2].port" <<< $json)
>  
> +# validate root ports per host bridge
> +check_host_bridge()
> +{
> +	json=$($CXL list -b cxl_test -T -p $1)
> +	count=$(jq ".[] | .dports | length" <<< $json)
> +	((count == $2)) || err "$3"
> +}
>  
> -# validate 2 root ports per host bridge
> -json=$($CXL list -b cxl_test -T -p ${bridge[0]})
> -count=$(jq ".[] | .dports | length" <<< $json)
> -((count == 2)) || err "$LINENO"
> -
> -json=$($CXL list -b cxl_test -T -p ${bridge[1]})
> -count=$(jq ".[] | .dports | length" <<< $json)
> -((count == 2)) || err "$LINENO"
> +check_host_bridge ${bridge[0]} 2 $LINENO
> +check_host_bridge ${bridge[1]} 2 $LINENO
> +((bridges > 2)) && check_host_bridge ${bridge[2]} 1 $LINENO
>  
> -
> -# validate 2 switches per-root port
> +# validate 2 switches per root-port
>  json=$($CXL list -b cxl_test -P -p ${bridge[0]})
>  count=$(jq ".[] | .[\"ports:${bridge[0]}\"] | length" <<< $json)
>  ((count == 2)) || err "$LINENO"
> @@ -65,9 +68,9 @@ switch[2]=$(jq -r ".[] | .[\"ports:${bridge[1]}\"] | $port_sort | .[0].host" <<<
>  switch[3]=$(jq -r ".[] | .[\"ports:${bridge[1]}\"] | $port_sort | .[1].host" <<< $json)
>  
>  
> -# validate the expected properties of the 4 root decoders
> -# use the size of the first decoder to determine the cxl_test version /
> -# properties
> +# validate the expected properties of the 4 or 5 root decoders
> +# use the size of the first decoder to determine the
> +# cxl_test version / properties
>  json=$($CXL list -b cxl_test -D -d root)
>  port_id=${root:4}
>  port_id_len=${#port_id}
> @@ -103,12 +106,19 @@ count=$(jq "[ $decoder_sort | .[3] |
>  	select(.nr_targets == 2) ] | length" <<< $json)
>  ((count == 1)) || err "$LINENO"
>  
> +if [ $bridges -eq 3 ]; then
> +	count=$(jq "[ $decoder_sort | .[4] |
> +		select(.pmem_capable == true) |
> +		select(.size == $decoder_base_size) |
> +		select(.nr_targets == 1) ] | length" <<< $json)
> +	((count == 1)) || err "$LINENO"
> +fi
>  
> -# check that all 8 cxl_test memdevs are enabled by default and have a
> +# check that all 8 or 10 cxl_test memdevs are enabled by default and have a
>  # pmem size of 256M, or 1G
>  json=$($CXL list -b cxl_test -M)
>  count=$(jq "map(select(.pmem_size == $pmem_size)) | length" <<< $json)
> -((count == 8)) || err "$LINENO"
> +((bridges == 2 && count == 8 || bridges == 3 && count == 10)) || err "$LINENO"
>  
>  
>  # check that switch ports disappear after all of their memdevs have been
> @@ -151,8 +161,8 @@ do
>  done
>  
>  
> -# validate host bridge tear down
> -for b in ${bridge[@]}
> +# validate host bridge tear down for the first 2 bridges
> +for b in ${bridge[0]} ${bridge[1]}
>  do
>  	$CXL disable-port $b -f
>  	json=$($CXL list -M -i -p $b)
>