[ndctl PATCH v4] cxl: Add list verbose option to the cxl command

[sunfishho12@gmail.com]

From: Matthew Ho <sunfishho12@gmail.com>

This adds the new subcommands cxl list -v, cxl list -vv, and cxl list -vvv.

cxl list -v is now equivalent to cxl list -RMBDPT, cxl list -vv is
equivalent to cxl list -RMBDPTi, and cxl list -vvv is equivalent to
cxl list -RMBDPTiHI. These additions make it easier to list all of the CXL
devices without having to remember which subcommand must be appended for each
type of device.

Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Adam Manzanares <a.manzanares@samsung.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Matthew Ho <sunfishho12@gmail.com>
---
Changes since v3[1]

 - Fixed formatting of patch
 - Amended patch to apply to latest region driver patches [2]
 - Added missed "Acked-by"

[1]: https://lore.kernel.org/linux-cxl/20220722183705.26936-1-sunfishho12@gmail.com/
[2]: https://lore.kernel.org/linux-cxl/20220810230914.549611-1-vishal.l.verma@intel.com/

Maybe this could be added to the region driver series?

 Documentation/cxl/cxl-list.txt | 20 ++++++++++++++++++++
 cxl/filter.h                   |  1 +
 cxl/list.c                     | 21 +++++++++++++++++++++
 3 files changed, 42 insertions(+)

diff --git a/Documentation/cxl/cxl-list.txt b/Documentation/cxl/cxl-list.txt
index 2906c2f6ef4b..0e7727ca167f 100644
--- a/Documentation/cxl/cxl-list.txt
+++ b/Documentation/cxl/cxl-list.txt
@@ -336,6 +336,26 @@ OPTIONS
 --region::
 	Specify the region name to filter the emitted regions.

+-v::
+--verbose::
+	Increase verbosity of the output. This can be specified
+	multiple times to be even more verbose on the
+	informational and miscellaneous output, and can be used
+	to override omitted flags for showing specific
+	information. Note that cxl list --verbose --verbose is
+	equivalent to cxl list -vv, and likewise
+	cxl list --verbose --verbose --verbose is equivalent to
+	cxl list -vvv.
+	- *-v*
+	  Enable --memdevs, --regions, --buses,
+	  --ports, --decoders, and --targets.
+	- *-vv*
+	  Everything *-v* provides, plus include disabled
+	  devices with --idle.
+	- *-vvv*
+	  Everything *-vvv* provides, plus enable
+	  --health and --partition.
+
 --debug::
 	If the cxl tool was built with debug enabled, turn on debug
 	messages.
diff --git a/cxl/filter.h b/cxl/filter.h
index d22d8b1f798b..256df49c3d0c 100644
--- a/cxl/filter.h
+++ b/cxl/filter.h
@@ -26,6 +26,7 @@ struct cxl_filter_params {
 	bool human;
 	bool health;
 	bool partition;
+	int verbose;
 	struct log_ctx ctx;
 };

diff --git a/cxl/list.c b/cxl/list.c
index 5f604ecddf3c..8c48fbbaaec3 100644
--- a/cxl/list.c
+++ b/cxl/list.c
@@ -52,6 +52,8 @@ static const struct option options[] = {
 		    "include memory device health information"),
 	OPT_BOOLEAN('I', "partition", &param.partition,
 		    "include memory device partition information"),
+	OPT_INCR('v', "verbose", &param.verbose,
+		 "increase output detail"),
 #ifdef ENABLE_DEBUG
 	OPT_BOOLEAN(0, "debug", &debug, "debug list walk"),
 #endif
@@ -106,6 +108,25 @@ int cmd_list(int argc, const char **argv, struct cxl_ctx *ctx)
 		param.memdevs = true;
 	}

+	switch(param.verbose){
+	default:
+	case 3:
+		param.health = true;
+		param.partition = true;
+		/* fallthrough */
+	case 2:
+		param.idle = true;
+		/* fallthrough */
+	case 1:
+		param.buses = true;
+		param.ports = true;
+		param.decoders = true;
+		param.targets = true;
+		/*fallthrough*/
+	case 0:
+		break;
+	}
+
 	log_init(&param.ctx, "cxl list", "CXL_LIST_LOG");
 	if (debug) {
 		cxl_set_log_priority(ctx, LOG_DEBUG);
--
2.34.1