[ndctl PATCH v8 6/7] cxl/list: add --media-errors option to cxl list

[alison.schofield@intel.com]

From: Alison Schofield <alison.schofield@intel.com>

The --media-errors option to 'cxl list' retrieves poison lists from
memory devices supporting the capability and displays the returned
media_error records in the cxl list json. This option can apply to
memdevs or regions.

Include media-errors in the -vvv verbose option.

Example usage in the Documentation/cxl/cxl-list.txt update.

Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
---
 Documentation/cxl/cxl-list.txt | 79 +++++++++++++++++++++++++++++++++-
 cxl/filter.h                   |  3 ++
 cxl/list.c                     |  3 ++
 3 files changed, 84 insertions(+), 1 deletion(-)

diff --git a/Documentation/cxl/cxl-list.txt b/Documentation/cxl/cxl-list.txt
index 838de4086678..5c20614ef579 100644
--- a/Documentation/cxl/cxl-list.txt
+++ b/Documentation/cxl/cxl-list.txt
@@ -415,6 +415,83 @@ OPTIONS
 --region::
 	Specify CXL region device name(s), or device id(s), to filter the listing.
 
+-L::
+--media-errors::
+	Include media-error information. The poison list is retrieved from the
+	device(s) and media_error records are added to the listing. Apply this
+	option to memdevs and regions where devices support the poison list
+	capability.
+
+	"decoder" and "hpa" are included when the media-error is in a mapped
+        address.
+
+	"source" will be one of: External, Internal, Injected, Vendor Specific,
+        or Unknown, as defined in CXL Specification v3.1 Table 8-140.
+
+----
+# cxl list -m mem1 --media-errors
+[
+  {
+    "memdev":"mem1",
+    "pmem_size":1073741824,
+    "ram_size":1073741824,
+    "serial":1,
+    "numa_node":1,
+    "host":"cxl_mem.1",
+    "media_errors":[
+      {
+        "dpa":0,
+        "length":64,
+        "source":"Internal"
+      },
+      {
+        "decoder":"decoder10.0",
+        "hpa":1035355557888,
+        "dpa":1073741824,
+        "length":64,
+        "source":"External"
+      },
+      {
+        "decoder":"decoder10.0",
+        "hpa":1035355566080,
+        "dpa":1073745920,
+        "length":64,
+        "source":"Injected"
+      }
+    ]
+  }
+]
+
+# cxl list -r region5 --media-errors
+[
+  {
+    "region":"region5",
+    "resource":1035355553792,
+    "size":2147483648,
+    "type":"pmem",
+    "interleave_ways":2,
+    "interleave_granularity":4096,
+    "decode_state":"commit",
+    "media_errors":[
+      {
+        "decoder":"decoder10.0",
+        "hpa":1035355557888,
+        "dpa":1073741824,
+        "length":64,
+        "source":"External"
+      },
+      {
+        "decoder":"decoder8.1",
+        "hpa":1035355553792,
+        "dpa":1073741824,
+        "length":64,
+        "source":"Internal"
+      }
+    ]
+  }
+]
+----
+
 -v::
 --verbose::
 	Increase verbosity of the output. This can be specified
@@ -431,7 +508,7 @@ OPTIONS
 	  devices with --idle.
 	- *-vvv*
 	  Everything *-vv* provides, plus enable
-	  --health and --partition.
+	  --health, --partition, --media-errors.
 
 --debug::
 	If the cxl tool was built with debug enabled, turn on debug
diff --git a/cxl/filter.h b/cxl/filter.h
index 3f65990f835a..956a46e0c7a9 100644
--- a/cxl/filter.h
+++ b/cxl/filter.h
@@ -30,6 +30,7 @@ struct cxl_filter_params {
 	bool fw;
 	bool alert_config;
 	bool dax;
+	bool media_errors;
 	int verbose;
 	struct log_ctx ctx;
 };
@@ -88,6 +89,8 @@ static inline unsigned long cxl_filter_to_flags(struct cxl_filter_params *param)
 		flags |= UTIL_JSON_ALERT_CONFIG;
 	if (param->dax)
 		flags |= UTIL_JSON_DAX | UTIL_JSON_DAX_DEVS;
+	if (param->media_errors)
+		flags |= UTIL_JSON_MEDIA_ERRORS;
 	return flags;
 }
 
diff --git a/cxl/list.c b/cxl/list.c
index 93ba51ef895c..0b25d78248d5 100644
--- a/cxl/list.c
+++ b/cxl/list.c
@@ -57,6 +57,8 @@ static const struct option options[] = {
 		    "include memory device firmware information"),
 	OPT_BOOLEAN('A', "alert-config", &param.alert_config,
 		    "include alert configuration information"),
+	OPT_BOOLEAN('L', "media-errors", &param.media_errors,
+		    "include media-error information "),
 	OPT_INCR('v', "verbose", &param.verbose, "increase output detail"),
 #ifdef ENABLE_DEBUG
 	OPT_BOOLEAN(0, "debug", &debug, "debug list walk"),
@@ -121,6 +123,7 @@ int cmd_list(int argc, const char **argv, struct cxl_ctx *ctx)
 		param.fw = true;
 		param.alert_config = true;
 		param.dax = true;
+		param.media_errors = true;
 		/* fallthrough */
 	case 2:
 		param.idle = true;
-- 
2.37.3