svn commit: r308856 - head/sbin/nvmecontrol

[Warner Losh]

Author: imp
Date: Sat Nov 19 17:13:12 2016
New Revision: 308856
URL: https://svnweb.freebsd.org/changeset/base/308856

Log:
  Decode the Intel-specific Additional SMART data page (0xca) and print
  it in human readable form. Include a pointer to the public spec that
  was followed to implement this in the code. Samsung also implements
  page 0xca on some of their drives, but the format is slighly
  different, so the code skips printing zero keys. Samsung's log page
  has additional, unknown data after the end of Intel defined data which
  isn't displayed.
  
  Supported by: Netfix, Inc

Modified:
  head/sbin/nvmecontrol/logpage.c

Modified: head/sbin/nvmecontrol/logpage.c
==============================================================================
--- head/sbin/nvmecontrol/logpage.c	Sat Nov 19 17:13:08 2016	(r308855)
+++ head/sbin/nvmecontrol/logpage.c	Sat Nov 19 17:13:12 2016	(r308856)
@@ -55,7 +55,6 @@ __FBSDID("$FreeBSD$");
 
 typedef void (*print_fn_t)(void *buf, uint32_t size);
 
-
 struct kv_name
 {
 	uint32_t key;
@@ -106,6 +105,15 @@ uint128_to_str(uint128_t u, char *buf, s
 	return end;
 }
 
+/* "fMissing" from endian.h */
+static __inline uint64_t
+le48dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return (((uint64_t)le16dec(p + 4) << 32) | le32dec(p));
+}
+
 static void *
 get_log_buffer(uint32_t size)
 {
@@ -278,6 +286,13 @@ print_log_firmware(void *buf, uint32_t s
 	}
 }
 
+/*
+ * Intel specific log pages from
+ * http://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/ssd-dc-p3700-spec.pdf
+ *
+ * Though the version as of this date has a typo for the size of log page 0xca,
+ * offset 147: it is only 1 byte, not 6.
+ */
 static void
 print_intel_temp_stats(void *buf, uint32_t size __unused)
 {
@@ -301,6 +316,68 @@ print_intel_temp_stats(void *buf, uint32
 	printf("Estimated Temperature Offset:   %ju C/K\n", (uintmax_t)temp->est_offset);
 }
 
+static void
+print_intel_add_smart(void *buf, uint32_t size __unused)
+{
+	uint8_t *walker = buf;
+	uint8_t *end = walker + 150;
+	const char *name;
+	uint64_t raw;
+	uint8_t normalized;
+
+	static struct kv_name kv[] =
+	{
+		{ 0xab, "Program Fail Count" },
+		{ 0xac, "Erase Fail Count" },
+		{ 0xad, "Wear Leveling Count" },
+		{ 0xb8, "End to End Error Count" },
+		{ 0xc7, "CRC Error Count" },
+		{ 0xe2, "Timed: Media Wear" },
+		{ 0xe3, "Timed: Host Read %" },
+		{ 0xe4, "Timed: Elapsed Time" },
+		{ 0xea, "Thermal Throttle Status" },
+		{ 0xf0, "Retry Buffer Overflows" },
+		{ 0xf3, "PLL Lock Loss Count" },
+		{ 0xf4, "NAND Bytes Written" },
+		{ 0xf5, "Host Bytes Written" },
+	};
+
+	printf("Additional SMART Data Log\n");
+	printf("=========================\n");
+	/*
+	 * walker[0] = Key
+	 * walker[1,2] = reserved
+	 * walker[3] = Normalized Value
+	 * walker[4] = reserved
+	 * walker[5..10] = Little Endian Raw value
+	 *	(or other represenations)
+	 * walker[11] = reserved
+	 */
+	while (walker < end) {
+		name = kv_lookup(kv, nitems(kv), *walker);
+		normalized = walker[3];
+		raw = le48dec(walker + 5);
+		switch (*walker){
+		case 0:
+			break;
+		case 0xad:
+			printf("%-32s: %3d min: %u max: %u ave: %u\n", name, normalized,
+			    le16dec(walker + 5), le16dec(walker + 7), le16dec(walker + 9));
+			break;
+		case 0xe2:
+			printf("%-32s: %3d %.3f%%\n", name, normalized, raw / 1024.0);
+			break;
+		case 0xea:
+			printf("%-32s: %3d %d%% %d times\n", name, normalized, walker[5], le32dec(walker+6));
+			break;
+		default:
+			printf("%-32s: %3d %ju\n", name, normalized, (uintmax_t)raw);
+			break;
+		}
+		walker += 12;
+	}
+}
+
 /*
  * HGST's 0xc1 page. This is a grab bag of additional data. Please see
  * https://www.hgst.com/sites/default/files/resources/US_SN150_ProdManual.pdf
@@ -719,6 +796,8 @@ static struct logpage_function {
 	 sizeof(struct nvme_firmware_page)},
 	{INTEL_LOG_TEMP_STATS,		print_intel_temp_stats,
 	 sizeof(struct intel_log_temp_stats)},
+	{INTEL_LOG_ADD_SMART,		print_intel_add_smart,
+	 DEFAULT_SIZE},
 	{HGST_INFO_LOG,			print_hgst_info_log,
 	 DEFAULT_SIZE},
 	{0,				NULL,