[PATCH v6 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.

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

Signed-off-by: Alison Schofield <alison.schofield@intel.com>
---
 Documentation/cxl/cxl-list.txt | 71 ++++++++++++++++++++++++++++++++++
 cxl/filter.h                   |  3 ++
 cxl/list.c                     |  2 +
 3 files changed, 76 insertions(+)

diff --git a/Documentation/cxl/cxl-list.txt b/Documentation/cxl/cxl-list.txt
index 838de4086678..6105c896938c 100644
--- a/Documentation/cxl/cxl-list.txt
+++ b/Documentation/cxl/cxl-list.txt
@@ -415,6 +415,77 @@ 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.
+
+----
+# 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,
+        "dpa_length":64,
+        "source":"Injected"
+      },
+      {
+        "region":"region5",
+        "dpa":1073741824,
+        "dpa_length":64,
+        "hpa":1035355557888,
+        "source":"Injected"
+      },
+      {
+        "region":"region5",
+        "dpa":1073745920,
+        "dpa_length":64,
+        "hpa":1035355566080,
+        "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":[
+      {
+        "memdev":"mem1",
+        "dpa":1073741824,
+        "dpa_length":64,
+        "hpa":1035355557888,
+        "source":"Injected"
+      },
+      {
+        "memdev":"mem1",
+        "dpa":1073745920,
+        "dpa_length":64,
+        "hpa":1035355566080,
+        "source":"Injected"
+      }
+    ]
+  }
+]
+----
+
 -v::
 --verbose::
 	Increase verbosity of the output. This can be specified
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..bcdee0afd405 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"),
-- 
2.37.3