Merging upstream version 2.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 788 insertions, 0 deletions

diff --git a/plugins/ocp/ocp-nvme.c b/plugins/ocp/ocp-nvme.c
new file mode 100644
index 0000000..6b7fc9d
--- /dev/null
+++ b/plugins/ocp/ocp-nvme.c
@@ -0,0 +1,788 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2022 Meta Platforms, Inc.
+ *
+ * Authors: Arthur Shau <arthurshau@fb.com>,
+ *          Wei Zhang <wzhang@fb.com>,
+ *   	    Venkat Ramesh <venkatraghavan@fb.com>
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <limits.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "nvme.h"
+#include "libnvme.h"
+#include "plugin.h"
+#include "linux/types.h"
+#include "nvme-print.h"
+
+#define CREATE_CMD
+#include "ocp-nvme.h"
+
+/* C0 SCAO Log Page */
+#define C0_SMART_CLOUD_ATTR_LEN             0x200
+#define C0_SMART_CLOUD_ATTR_OPCODE          0xC0
+#define C0_GUID_LENGTH                      16
+#define C0_ACTIVE_BUCKET_TIMER_INCREMENT    5
+#define C0_ACTIVE_THRESHOLD_INCREMENT       5
+#define C0_MINIMUM_WINDOW_INCREMENT         100
+
+static __u8 scao_guid[C0_GUID_LENGTH]    = { 0xC5, 0xAF, 0x10, 0x28, 0xEA, 0xBF,
+                0xF2, 0xA4, 0x9C, 0x4F, 0x6F, 0x7C, 0xC9, 0x14, 0xD5, 0xAF };
+
+/* C3 Latency Monitor Log Page */
+#define C3_LATENCY_MON_LOG_BUF_LEN          0x200
+#define C3_LATENCY_MON_OPCODE               0xC3
+#define C3_LATENCY_MON_VERSION              0x0001
+#define C3_GUID_LENGTH                      16
+static __u8 lat_mon_guid[C3_GUID_LENGTH] = { 0x92, 0x7a, 0xc0, 0x8c, 0xd0, 0x84,
+                0x6c, 0x9c, 0x70, 0x43, 0xe6, 0xd4, 0x58, 0x5e, 0xd4, 0x85 };
+
+#define READ            0
+#define WRITE           1
+#define TRIM            2
+#define RESERVED        3
+
+typedef enum {
+        SCAO_PMUW               =  0,	/* Physical media units written */
+        SCAO_PMUR               = 16,	/* Physical media units read */
+        SCAO_BUNBR              = 32,	/* Bad user nand blocks raw */
+        SCAO_BUNBN              = 38,	/* Bad user nand blocks normalized */
+        SCAO_BSNBR              = 40,	/* Bad system nand blocks raw */
+        SCAO_BSNBN              = 46,	/* Bad system nand blocks normalized */
+        SCAO_XRC                = 48,	/* XOR recovery count */
+        SCAO_UREC               = 56,	/* Uncorrectable read error count */
+        SCAO_SEEC               = 64,	/* Soft ecc error count */
+        SCAO_EECE               = 72,	/* End to end corrected errors */
+        SCAO_EEDC               = 76,	/* End to end detected errors */
+        SCAO_SDPU               = 80,	/* System data percent used */
+        SCAO_RFSC               = 81,	/* Refresh counts */
+        SCAO_MXUDEC             = 88,	/* Max User data erase counts */
+        SCAO_MNUDEC             = 92,	/* Min User data erase counts */
+        SCAO_NTTE               = 96,	/* Number of Thermal throttling events */
+        SCAO_CTS                = 97,	/* Current throttling status */
+        SCAO_EVF                = 98,   /* Errata Version Field */
+        SCAO_PVF                = 99,   /* Point Version Field */
+        SCAO_MIVF               = 101,  /* Minor Version Field */
+        SCAO_MAVF               = 103,  /* Major Version Field */
+        SCAO_PCEC               = 104,	/* PCIe correctable error count */
+        SCAO_ICS                = 112,	/* Incomplete shutdowns */
+        SCAO_PFB                = 120,	/* Percent free blocks */
+        SCAO_CPH                = 128,	/* Capacitor health */
+        SCAO_NEV                = 130,  /* NVMe Errata Version */
+        SCAO_UIO                = 136,	/* Unaligned I/O */
+        SCAO_SVN                = 144,	/* Security Version Number */
+        SCAO_NUSE               = 152,	/* NUSE - Namespace utilization */
+        SCAO_PSC                = 160,	/* PLP start count */
+        SCAO_EEST               = 176,	/* Endurance estimate */
+        SCAO_PLRC               = 192,  /* PCIe Link Retraining Count */
+        SCAO_LPV                = 494,	/* Log page version */
+        SCAO_LPG                = 496,	/* Log page GUID */
+} SMART_CLOUD_ATTRIBUTE_OFFSETS;
+
+struct __attribute__((__packed__)) ssd_latency_monitor_log {
+        __u8    feature_status;                         /* 0x00  */
+        __u8    rsvd1;                                  /* 0x01  */
+        __le16  active_bucket_timer;                    /* 0x02  */
+        __le16  active_bucket_timer_threshold;          /* 0x04  */
+        __u8    active_threshold_a;                     /* 0x06  */
+        __u8    active_threshold_b;                     /* 0x07  */
+        __u8    active_threshold_c;                     /* 0x08  */
+        __u8    active_threshold_d;                     /* 0x09  */
+        __le16  active_latency_config;                  /* 0x0A  */
+        __u8    active_latency_min_window;              /* 0x0C  */
+        __u8    rsvd2[0x13];                            /* 0x0D  */
+
+        __le32  active_bucket_counter[4][4] ;           /* 0x20 - 0x5F   */
+        __le64  active_latency_timestamp[4][3];         /* 0x60 - 0xBF   */
+        __le16  active_measured_latency[4][3];          /* 0xC0 - 0xD7   */
+        __le16  active_latency_stamp_units;             /* 0xD8  */
+        __u8    rsvd3[0x16];                            /* 0xDA  */
+
+        __le32  static_bucket_counter[4][4] ;           /* 0xF0  - 0x12F */
+        __le64  static_latency_timestamp[4][3];         /* 0x130 - 0x18F */
+        __le16  static_measured_latency[4][3];          /* 0x190 - 0x1A7 */
+        __le16  static_latency_stamp_units;             /* 0x1A8 */
+        __u8    rsvd4[0x16];                            /* 0x1AA */
+
+        __le16  debug_log_trigger_enable;               /* 0x1C0 */
+        __le16  debug_log_measured_latency;             /* 0x1C2 */
+        __le64  debug_log_latency_stamp;                /* 0x1C4 */
+        __le16  debug_log_ptr;                          /* 0x1CC */
+        __le16  debug_log_counter_trigger;              /* 0x1CE */
+        __u8    debug_log_stamp_units;                  /* 0x1D0 */
+        __u8    rsvd5[0x1D];                            /* 0x1D1 */
+
+        __le16  log_page_version;                       /* 0x1EE */
+        __u8    log_page_guid[0x10];                    /* 0x1F0 */
+};
+
+static long double int128_to_double(__u8 *data)
+{
+        int i;
+        long double result = 0;
+
+        for (i = 0; i < 16; i++) {
+                result *= 256;
+                result += data[15 - i];
+        }
+        return result;
+}
+
+static int convert_ts(time_t time, char *ts_buf)
+{
+        struct tm  gmTimeInfo;
+        time_t     time_Human, time_ms;
+        char       buf[80];
+
+        time_Human = time/1000;
+        time_ms = time % 1000;
+
+        gmtime_r((const time_t *)&time_Human, &gmTimeInfo);
+
+        strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", &gmTimeInfo);
+        sprintf(ts_buf, "%s.%03ld GMT", buf, time_ms);
+
+        return 0;
+}
+
+static void ocp_print_C0_log_normal(void *data)
+{
+        __u8 *log_data = (__u8*)data;
+        uint16_t smart_log_ver = 0;
+
+        printf("SMART Cloud Attributes :- \n");
+
+        printf("  Physical media units written -   	        %"PRIu64" %"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PMUW+8] & 0xFFFFFFFFFFFFFFFF),
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PMUW] & 0xFFFFFFFFFFFFFFFF));
+        printf("  Physical media units read    - 	        %"PRIu64" %"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PMUR+8] & 0xFFFFFFFFFFFFFFFF),
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PMUR] & 0xFFFFFFFFFFFFFFFF));
+        printf("  Bad user nand blocks - Raw			%"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_BUNBR] & 0x0000FFFFFFFFFFFF));
+        printf("  Bad user nand blocks - Normalized		%d\n",
+                        (uint16_t)le16_to_cpu(*(uint16_t *)&log_data[SCAO_BUNBN]));
+        printf("  Bad system nand blocks - Raw			%"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_BSNBR] & 0x0000FFFFFFFFFFFF));
+        printf("  Bad system nand blocks - Normalized		%d\n",
+                        (uint16_t)le16_to_cpu(*(uint16_t *)&log_data[SCAO_BSNBN]));
+        printf("  XOR recovery count				%"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_XRC]));
+        printf("  Uncorrectable read error count		%"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_UREC]));
+        printf("  Soft ecc error count				%"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_SEEC]));
+        printf("  End to end corrected errors			%"PRIu32"\n",
+                        (uint32_t)le32_to_cpu(*(uint32_t *)&log_data[SCAO_EECE]));
+        printf("  End to end detected errors			%"PRIu32"\n",
+                        (uint32_t)le32_to_cpu(*(uint32_t *)&log_data[SCAO_EEDC]));
+        printf("  System data percent used			%d\n",
+                        (__u8)log_data[SCAO_SDPU]);
+        printf("  Refresh counts				%"PRIu64"\n",
+                        (uint64_t)(le64_to_cpu(*(uint64_t *)&log_data[SCAO_RFSC])& 0x00FFFFFFFFFFFFFF));
+        printf("  Max User data erase counts			%"PRIu32"\n",
+                        (uint32_t)le32_to_cpu(*(uint32_t *)&log_data[SCAO_MXUDEC]));
+        printf("  Min User data erase counts			%"PRIu32"\n",
+                        (uint32_t)le32_to_cpu(*(uint32_t *)&log_data[SCAO_MNUDEC]));
+        printf("  Number of Thermal throttling events		%d\n",
+                        (__u8)log_data[SCAO_NTTE]);
+        printf("  Current throttling status		  	0x%x\n",
+                        (__u8)log_data[SCAO_CTS]);
+        printf("  PCIe correctable error count			%"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PCEC]));
+        printf("  Incomplete shutdowns				%"PRIu32"\n",
+                        (uint32_t)le32_to_cpu(*(uint32_t *)&log_data[SCAO_ICS]));
+        printf("  Percent free blocks				%d\n",
+                        (__u8)log_data[SCAO_PFB]);
+        printf("  Capacitor health				%"PRIu16"\n",
+                        (uint16_t)le16_to_cpu(*(uint16_t *)&log_data[SCAO_CPH]));
+        printf("  Unaligned I/O					%"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_UIO]));
+        printf("  Security Version Number			%"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_SVN]));
+        printf("  NUSE - Namespace utilization			%"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_NUSE]));
+        printf("  PLP start count				%.0Lf\n",
+                        int128_to_double(&log_data[SCAO_PSC]));
+        printf("  Endurance estimate				%.0Lf\n",
+                        int128_to_double(&log_data[SCAO_EEST]));
+        smart_log_ver = (uint16_t)le16_to_cpu(*(uint16_t *)&log_data[SCAO_LPV]);
+        printf("  Log page version				%"PRIu16"\n",smart_log_ver);
+        printf("  Log page GUID					0x");
+        printf("%"PRIx64"%"PRIx64"\n",(uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_LPG + 8]),
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_LPG]));
+        if(smart_log_ver > 2) {
+                printf("  Errata Version Field                          %d\n",
+                                (__u8)log_data[SCAO_EVF]);
+                printf("  Point Version Field                           %"PRIu16"\n",
+                                (uint16_t)log_data[SCAO_PVF]);
+                printf("  Minor Version Field                           %"PRIu16"\n",
+                                (uint16_t)log_data[SCAO_MIVF]);
+                printf("  Major Version Field                           %d\n",
+                                (__u8)log_data[SCAO_MAVF]);
+                printf("  NVMe Errata Version				%d\n",
+                                (__u8)log_data[SCAO_NEV]);
+                printf("  PCIe Link Retraining Count			%"PRIu64"\n",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PLRC]));
+        }
+        printf("\n");
+}
+
+static void ocp_print_C0_log_json(void *data)
+{
+        __u8 *log_data = (__u8*)data;
+        struct json_object *root;
+        struct json_object *pmuw;
+        struct json_object *pmur;
+        uint16_t smart_log_ver = 0;
+
+        root = json_create_object();
+        pmuw = json_create_object();
+        pmur = json_create_object();
+
+        json_object_add_value_uint64(pmuw, "hi",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PMUW+8] & 0xFFFFFFFFFFFFFFFF));
+        json_object_add_value_uint64(pmuw, "lo",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PMUW] & 0xFFFFFFFFFFFFFFFF));
+        json_object_add_value_object(root, "Physical media units written", pmuw);
+        json_object_add_value_uint64(pmur, "hi",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PMUR+8] & 0xFFFFFFFFFFFFFFFF));
+        json_object_add_value_uint64(pmur, "lo",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PMUR] & 0xFFFFFFFFFFFFFFFF));
+        json_object_add_value_object(root, "Physical media units read", pmur);
+        json_object_add_value_uint64(root, "Bad user nand blocks - Raw",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_BUNBR] & 0x0000FFFFFFFFFFFF));
+        json_object_add_value_uint(root, "Bad user nand blocks - Normalized",
+                        (uint16_t)le16_to_cpu(*(uint16_t *)&log_data[SCAO_BUNBN]));
+        json_object_add_value_uint64(root, "Bad system nand blocks - Raw",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_BSNBR] & 0x0000FFFFFFFFFFFF));
+        json_object_add_value_uint(root, "Bad system nand blocks - Normalized",
+                        (uint16_t)le16_to_cpu(*(uint16_t *)&log_data[SCAO_BSNBN]));
+        json_object_add_value_uint64(root, "XOR recovery count",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_XRC]));
+        json_object_add_value_uint64(root, "Uncorrectable read error count",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_UREC]));
+        json_object_add_value_uint64(root, "Soft ecc error count",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_SEEC]));
+        json_object_add_value_uint(root, "End to end corrected errors",
+                        (uint32_t)le32_to_cpu(*(uint32_t *)&log_data[SCAO_EECE]));
+        json_object_add_value_uint(root, "End to end detected errors",
+                        (uint32_t)le32_to_cpu(*(uint32_t *)&log_data[SCAO_EEDC]));
+        json_object_add_value_uint(root, "System data percent used",
+                        (__u8)log_data[SCAO_SDPU]);
+        json_object_add_value_uint64(root, "Refresh counts",
+                        (uint64_t)(le64_to_cpu(*(uint64_t *)&log_data[SCAO_RFSC])& 0x00FFFFFFFFFFFFFF));
+        json_object_add_value_uint(root, "Max User data erase counts",
+                        (uint32_t)le32_to_cpu(*(uint32_t *)&log_data[SCAO_MXUDEC]));
+        json_object_add_value_uint(root, "Min User data erase counts",
+                        (uint32_t)le32_to_cpu(*(uint32_t *)&log_data[SCAO_MNUDEC]));
+        json_object_add_value_uint(root, "Number of Thermal throttling events",
+                        (__u8)log_data[SCAO_NTTE]);
+        json_object_add_value_uint(root, "Current throttling status",
+                        (__u8)log_data[SCAO_CTS]);
+        json_object_add_value_uint64(root, "PCIe correctable error count",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PCEC]));
+        json_object_add_value_uint(root, "Incomplete shutdowns",
+                        (uint32_t)le32_to_cpu(*(uint32_t *)&log_data[SCAO_ICS]));
+        json_object_add_value_uint(root, "Percent free blocks",
+                        (__u8)log_data[SCAO_PFB]);
+        json_object_add_value_uint(root, "Capacitor health",
+                        (uint16_t)le16_to_cpu(*(uint16_t *)&log_data[SCAO_CPH]));
+        json_object_add_value_uint64(root, "Unaligned I/O",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_UIO]));
+        json_object_add_value_uint64(root, "Security Version Number",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_SVN]));
+        json_object_add_value_uint64(root, "NUSE - Namespace utilization",
+                        (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_NUSE]));
+        json_object_add_value_uint(root, "PLP start count",
+                        int128_to_double(&log_data[SCAO_PSC]));
+        json_object_add_value_uint64(root, "Endurance estimate",
+                        int128_to_double(&log_data[SCAO_EEST]));
+        smart_log_ver = (uint16_t)le16_to_cpu(*(uint16_t *)&log_data[SCAO_LPV]);
+        json_object_add_value_uint(root, "Log page version", smart_log_ver);
+        char guid[40];
+        memset((void*)guid, 0, 40);
+        sprintf((char*)guid, "0x%"PRIx64"%"PRIx64"",(uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_LPG + 8]),
+                (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_LPG]));
+        json_object_add_value_string(root, "Log page GUID", guid);
+        if(smart_log_ver > 2){
+                json_object_add_value_uint(root, "Errata Version Field",
+                                (__u8)log_data[SCAO_EVF]);
+                json_object_add_value_uint(root, "Point Version Field",
+                                (uint16_t)log_data[SCAO_PVF]);
+                json_object_add_value_uint(root, "Minor Version Field",
+                                (uint16_t)log_data[SCAO_MIVF]);
+                json_object_add_value_uint(root, "Major Version Field",
+                                (__u8)log_data[SCAO_MAVF]);
+                json_object_add_value_uint(root, "NVMe Errata Version",
+                                (__u8)log_data[SCAO_NEV]);
+                json_object_add_value_uint(root, "PCIe Link Retraining Count",
+                                (uint64_t)le64_to_cpu(*(uint64_t *)&log_data[SCAO_PLRC]));
+        }
+        json_print_object(root, NULL);
+        printf("\n");
+        json_free_object(root);
+}
+
+static int get_c0_log_page(int fd, char *format)
+{
+        int ret = 0;
+        int fmt = -1;
+        __u8 *data;
+        int i;
+
+        fmt = validate_output_format(format);
+        if (fmt < 0) {
+                fprintf(stderr, "ERROR : OCP : invalid output format\n");
+                return fmt;
+        }
+
+        if ((data = (__u8 *) malloc(sizeof(__u8) * C0_SMART_CLOUD_ATTR_LEN)) == NULL) {
+                fprintf(stderr, "ERROR : OCP : malloc : %s\n", strerror(errno));
+                return -1;
+        }
+        memset(data, 0, sizeof (__u8) * C0_SMART_CLOUD_ATTR_LEN);
+
+        ret = nvme_get_log_simple(fd, C0_SMART_CLOUD_ATTR_OPCODE,
+                        C0_SMART_CLOUD_ATTR_LEN, data);
+
+        if (strcmp(format, "json"))
+                fprintf(stderr, "NVMe Status:%s(%x)\n",
+                        nvme_status_to_string(ret, false), ret);
+
+        if (ret == 0) {
+
+                /* check log page guid */
+                /* Verify GUID matches */
+                for (i=0; i<16; i++) {
+                        if (scao_guid[i] != data[SCAO_LPG + i])	{
+                                fprintf(stderr, "ERROR : OCP : Unknown GUID in C0 Log Page data\n");
+                                int j;
+                                fprintf(stderr, "ERROR : OCP : Expected GUID:  0x");
+                                for (j = 0; j<16; j++) {
+                                        fprintf(stderr, "%x", scao_guid[j]);
+                                }
+                                fprintf(stderr, "\nERROR : OCP : Actual GUID:    0x");
+                                for (j = 0; j<16; j++) {
+                                        fprintf(stderr, "%x", data[SCAO_LPG + j]);
+                                }
+                                fprintf(stderr, "\n");
+
+                                ret = -1;
+                                goto out;
+                        }
+                }
+
+                /* print the data */
+                if (!data) {
+                        fprintf(stderr, "ERROR : OCP : Invalid buffer to read 0xC0 log\n");
+                        ret = -1;
+                        goto out;
+                }
+                switch (fmt) {
+                case NORMAL:
+                        ocp_print_C0_log_normal(data);
+                        break;
+                case JSON:
+                        ocp_print_C0_log_json(data);
+                        break;
+                }
+        } else {
+                fprintf(stderr, "ERROR : OCP : Unable to read C0 data from buffer\n");
+        }
+
+out:
+        free(data);
+        return ret;
+}
+
+static int ocp_smart_add_log(int argc, char **argv, struct command *cmd,
+                struct plugin *plugin)
+{
+        const char *desc = "Retrieve latency monitor log data.";
+        int fd;
+        int ret = 0;
+
+        struct config {
+                char *output_format;
+        };
+
+        struct config cfg = {
+                .output_format = "normal",
+        };
+
+        OPT_ARGS(opts) = {
+                OPT_FMT("output-format", 'o', &cfg.output_format, "output Format: normal|json"),
+                OPT_END()
+        };
+
+        fd = parse_and_open(argc, argv, desc, opts);
+        if (fd < 0)
+                return fd;
+
+        ret = get_c0_log_page(fd, cfg.output_format);
+        if (ret)
+                fprintf(stderr, "ERROR : OCP : Failure reading the C0 Log Page, ret = %d\n",
+                        ret);
+
+        return ret;
+}
+
+static int ocp_print_C3_log_normal(int fd, struct ssd_latency_monitor_log *log_data)
+{
+        printf("-Latency Monitor/C3 Log Page Data- \n");
+        printf("  Controller   :  %s\n", devicename);
+        int i, j;
+        int pos = 0;
+        char       ts_buf[128];
+
+        printf("  Feature Status                     0x%x \n",
+                log_data->feature_status);
+        printf("  Active Bucket Timer                %d min \n",
+                 C0_ACTIVE_BUCKET_TIMER_INCREMENT *
+                 le16_to_cpu(log_data->active_bucket_timer));
+        printf("  Active Bucket Timer Threshold      %d min \n",
+                 C0_ACTIVE_BUCKET_TIMER_INCREMENT *
+                 le16_to_cpu(log_data->active_bucket_timer_threshold));
+        printf("  Active Threshold A                 %d ms \n",
+                 C0_ACTIVE_THRESHOLD_INCREMENT *
+                 le16_to_cpu(log_data->active_threshold_a+1));
+        printf("  Active Threshold B                 %d ms \n",
+                 C0_ACTIVE_THRESHOLD_INCREMENT *
+                 le16_to_cpu(log_data->active_threshold_b+1));
+        printf("  Active Threshold C                 %d ms \n",
+                 C0_ACTIVE_THRESHOLD_INCREMENT *
+                 le16_to_cpu(log_data->active_threshold_c+1));
+        printf("  Active Threshold D                 %d ms \n",
+                 C0_ACTIVE_THRESHOLD_INCREMENT *
+                 le16_to_cpu(log_data->active_threshold_d+1));
+        printf("  Active Latency Minimum Window      %d ms \n",
+                 C0_MINIMUM_WINDOW_INCREMENT *
+                 le16_to_cpu(log_data->active_latency_min_window));
+        printf("  Active Latency Stamp Units         %d \n",
+                 le16_to_cpu(log_data->active_latency_stamp_units));
+        printf("  Static Latency Stamp Units         %d \n",
+                 le16_to_cpu(log_data->static_latency_stamp_units));
+        printf("  Debug Log Trigger Enable           %d \n",
+                 le16_to_cpu(log_data->debug_log_trigger_enable));
+
+        printf("                                                            Read                           Write                 Deallocate/Trim \n");
+        for (i = 0; i <= 3; i++) {
+                printf("  Active Latency Mode: Bucket %d      %27d     %27d     %27d \n",
+                        i,
+                        log_data->active_latency_config & (1 << pos),
+                        log_data->active_latency_config & (1 << pos),
+                        log_data->active_latency_config & (1 << pos));
+        }
+        printf("\n");
+        for (i = 0; i <= 3; i++) {
+                printf("  Active Bucket Counter: Bucket %d    %27d     %27d     %27d \n",
+                        i,
+                        le32_to_cpu(log_data->active_bucket_counter[i][READ]),
+                        le32_to_cpu(log_data->active_bucket_counter[i][WRITE]),
+                        le32_to_cpu(log_data->active_bucket_counter[i][TRIM]));
+        }
+
+        for (i = 0; i <= 3; i++) {
+                printf("  Active Measured Latency: Bucket %d  %27d ms  %27d ms  %27d ms \n",
+                        i,
+                        le16_to_cpu(log_data->active_measured_latency[i][READ]),
+                        le16_to_cpu(log_data->active_measured_latency[i][WRITE]),
+                        le16_to_cpu(log_data->active_measured_latency[i][TRIM]));
+        }
+
+        for (i = 0; i <= 3; i++) {
+                printf("  Active Latency Time Stamp: Bucket %d    ", i);
+                for (j = 0; j <= 2; j++) {
+                        if (le64_to_cpu(log_data->active_latency_timestamp[i][j]) == -1)
+                                printf("                    N/A         ");
+                        else {
+                                convert_ts(le64_to_cpu(log_data->active_latency_timestamp[i][j]), ts_buf);
+                                printf("%s     ", ts_buf);
+                        }
+                }
+                printf("\n");
+        }
+
+        for (i = 0; i <= 3; i++) {
+                printf("  Static Bucket Counter: Bucket %d    %27d     %27d     %27d \n",
+                        i,
+                        le32_to_cpu(log_data->static_bucket_counter[i][READ]),
+                        le32_to_cpu(log_data->static_bucket_counter[i][WRITE]),
+                        le32_to_cpu(log_data->static_bucket_counter[i][TRIM]));
+        }
+
+        for (i = 0; i <= 3; i++) {
+                printf("  Static Measured Latency: Bucket %d  %27d ms  %27d ms  %27d ms \n",
+                        i,
+                        le16_to_cpu(log_data->static_measured_latency[i][READ]),
+                        le16_to_cpu(log_data->static_measured_latency[i][WRITE]),
+                        le16_to_cpu(log_data->static_measured_latency[i][TRIM]));
+        }
+
+        for (i = 0; i <= 3; i++) {
+                printf("  Static Latency Time Stamp: Bucket %d    ", i);
+                for (j = 0; j <= 2; j++) {
+                        if (le64_to_cpu(log_data->static_latency_timestamp[i][j]) == -1)
+                                printf("                    N/A         ");
+                        else {
+                                convert_ts(le64_to_cpu(log_data->static_latency_timestamp[i][j]), ts_buf);
+                                printf("%s     ", ts_buf);
+                        }
+                }
+                printf("\n");
+        }
+
+        return 0;
+}
+
+static void ocp_print_C3_log_json(struct ssd_latency_monitor_log *log_data)
+{
+        int i, j;
+        int pos = 0;
+        char	buf[128];
+        char    ts_buf[128];
+        char	*operation[3] = {"Read", "Write", "Trim"};
+        struct json_object *root;
+        root = json_create_object();
+
+        json_object_add_value_uint(root, "Feature Status",
+                        log_data->feature_status);
+        json_object_add_value_uint(root, "Active Bucket Timer",
+                        C0_ACTIVE_BUCKET_TIMER_INCREMENT *
+                        le16_to_cpu(log_data->active_bucket_timer));
+        json_object_add_value_uint(root, "Active Bucket Timer Threshold",
+                        C0_ACTIVE_BUCKET_TIMER_INCREMENT *
+                        le16_to_cpu(log_data->active_bucket_timer_threshold));
+        json_object_add_value_uint(root, "Active Threshold A",
+                        C0_ACTIVE_THRESHOLD_INCREMENT *
+                        le16_to_cpu(log_data->active_threshold_a+1));
+        json_object_add_value_uint(root, "Active Threshold B",
+                        C0_ACTIVE_THRESHOLD_INCREMENT *
+                        le16_to_cpu(log_data->active_threshold_b+1));
+        json_object_add_value_uint(root, "Active Threshold C",
+                        C0_ACTIVE_THRESHOLD_INCREMENT *
+                        le16_to_cpu(log_data->active_threshold_c+1));
+        json_object_add_value_uint(root, "Active Threshold D",
+                        C0_ACTIVE_THRESHOLD_INCREMENT *
+                        le16_to_cpu(log_data->active_threshold_d+1));
+        json_object_add_value_uint(root, "Active Lantency Minimum Window",
+                        C0_MINIMUM_WINDOW_INCREMENT *
+                        le16_to_cpu(log_data->active_latency_min_window));
+        json_object_add_value_uint(root, "Active Latency Stamp Units",
+                        le16_to_cpu(log_data->active_latency_stamp_units));
+        json_object_add_value_uint(root, "Static Latency Stamp Units",
+                        le16_to_cpu(log_data->static_latency_stamp_units));
+        json_object_add_value_uint(root, "Debug Log Trigger Enable",
+                        le16_to_cpu(log_data->debug_log_trigger_enable));
+
+        for (i = 0; i <= 3; i++) {
+                struct json_object *bucket;
+                bucket = json_create_object();
+                sprintf(buf, "Active Latency Mode: Bucket %d", i);
+                for (j = 0; j <= 2; j++) {
+                        json_object_add_value_uint(bucket, operation[j],
+                                        log_data->active_latency_config & (1 << pos));
+                }
+                json_object_add_value_object(root, buf, bucket);
+        }
+        for (i = 0; i <= 3; i++) {
+                struct json_object *bucket;
+                bucket = json_create_object();
+                sprintf(buf, "Active Bucket Counter: Bucket %d", i);
+                for (j = 0; j <= 2; j++) {
+                        json_object_add_value_uint(bucket, operation[j],
+                                        le32_to_cpu(log_data->active_bucket_counter[i][j]));
+                }
+                json_object_add_value_object(root, buf, bucket);
+        }
+        for (i = 0; i <= 3; i++) {
+                struct json_object *bucket;
+                bucket = json_create_object();
+                sprintf(buf, "Active Measured Latency: Bucket %d", i);
+                for (j = 0; j <= 2; j++) {
+                        json_object_add_value_uint(bucket, operation[j],
+                                        le16_to_cpu(log_data->active_measured_latency[i][j]));
+                }
+                json_object_add_value_object(root, buf, bucket);
+        }
+        for (i = 0; i <= 3; i++) {
+                struct json_object *bucket;
+                bucket = json_create_object();
+                sprintf(buf, "Active Latency Time Stamp: Bucket %d", i);
+                for (j = 0; j <= 2; j++) {
+                        if (le64_to_cpu(log_data->active_latency_timestamp[i][j]) == -1)
+                                json_object_add_value_string(bucket, operation[j], "NA");
+                        else {
+                                convert_ts(le64_to_cpu(log_data->active_latency_timestamp[i][j]), ts_buf);
+                                json_object_add_value_string(bucket, operation[j], ts_buf);
+                        }
+                }
+                json_object_add_value_object(root, buf, bucket);
+        }
+        for (i = 0; i <= 3; i++) {
+                struct json_object *bucket;
+                bucket = json_create_object();
+                sprintf(buf, "Static Bucket Counter: Bucket %d", i);
+                for (j = 0; j <= 2; j++) {
+                        json_object_add_value_uint(bucket, operation[j],
+                                        le32_to_cpu(log_data->static_bucket_counter[i][j]));
+                }
+                json_object_add_value_object(root, buf, bucket);
+        }
+        for (i = 0; i <= 3; i++) {
+                struct json_object *bucket;
+                bucket = json_create_object();
+                sprintf(buf, "Static Measured Latency: Bucket %d", i);
+                for (j = 0; j <= 2; j++) {
+                        json_object_add_value_uint(bucket, operation[j],
+                                        le16_to_cpu(log_data->static_measured_latency[i][j]));
+                }
+                json_object_add_value_object(root, buf, bucket);
+        }
+        for (i = 0; i <= 3; i++) {
+                struct json_object *bucket;
+                bucket = json_create_object();
+                sprintf(buf, "Static Latency Time Stamp: Bucket %d", i);
+                for (j = 0; j <= 2; j++) {
+                        if (le64_to_cpu(log_data->static_latency_timestamp[i][j]) == -1)
+                                json_object_add_value_string(bucket, operation[j], "NA");
+                        else {
+                                convert_ts(le64_to_cpu(log_data->static_latency_timestamp[i][j]), ts_buf);
+                                json_object_add_value_string(bucket, operation[j], ts_buf);
+                        }
+                }
+                json_object_add_value_object(root, buf, bucket);
+        }
+
+        json_print_object(root, NULL);
+        printf("\n");
+
+        json_free_object(root);
+}
+
+static int get_c3_log_page(int fd, char *format)
+{
+        int ret = 0;
+        int fmt = -1;
+        __u8 *data;
+        int i;
+        struct ssd_latency_monitor_log *log_data;
+
+        fmt = validate_output_format(format);
+        if (fmt < 0) {
+                fprintf(stderr, "ERROR : OCP : invalid output format\n");
+                return fmt;
+        }
+
+        if ((data = (__u8 *) malloc(sizeof(__u8) * C3_LATENCY_MON_LOG_BUF_LEN)) == NULL) {
+                fprintf(stderr, "ERROR : OCP : malloc : %s\n", strerror(errno));
+                return -1;
+        }
+        memset(data, 0, sizeof (__u8) * C3_LATENCY_MON_LOG_BUF_LEN);
+
+        ret = nvme_get_log_simple(fd, C3_LATENCY_MON_OPCODE,
+                        C3_LATENCY_MON_LOG_BUF_LEN, data);
+
+        if (strcmp(format, "json"))
+                fprintf(stderr,
+                        "NVMe Status:%s(%x)\n",
+                        nvme_status_to_string(ret, false),
+                        ret);
+
+        if (ret == 0) {
+                log_data = (struct ssd_latency_monitor_log*)data;
+
+                /* check log page version */
+                if (log_data->log_page_version != C3_LATENCY_MON_VERSION) {
+                        fprintf(stderr,
+                                "ERROR : OCP : invalid latency monitor version\n");
+                        ret = -1;
+                        goto out;
+                }
+
+                /* check log page guid */
+                /* Verify GUID matches */
+                for (i=0; i<16; i++) {
+                        if (lat_mon_guid[i] != log_data->log_page_guid[i]) {
+                                fprintf(stderr,"ERROR : OCP : Unknown GUID in C3 Log Page data\n");
+                                int j;
+                                fprintf(stderr, "ERROR : OCP : Expected GUID: 0x");
+                                for (j = 0; j<16; j++) {
+                                        fprintf(stderr, "%x", lat_mon_guid[j]);
+                                }
+                                fprintf(stderr, "\nERROR : OCP : Actual GUID: 0x");
+                                for (j = 0; j<16; j++) {
+                                        fprintf(stderr, "%x", log_data->log_page_guid[j]);
+                                }
+                                fprintf(stderr, "\n");
+
+                                ret = -1;
+                                goto out;
+                        }
+                }
+
+                /* print the data */
+                if (!log_data) {
+                        fprintf(stderr,
+                                "ERROR : OCP : Invalid C3 log data buffer\n");
+                        ret = -1;
+                        goto out;
+                }
+                switch (fmt) {
+                case NORMAL:
+                        ocp_print_C3_log_normal(fd, log_data);
+                        break;
+                case JSON:
+                        ocp_print_C3_log_json(log_data);
+                        break;
+                }
+        } else {
+                fprintf(stderr,
+                        "ERROR : OCP : Unable to read C3 data from buffer\n");
+        }
+
+out:
+        free(data);
+        return ret;
+}
+
+static int ocp_latency_monitor_log(int argc, char **argv, struct command *command,
+                struct plugin *plugin)
+{
+        const char *desc = "Retrieve latency monitor log data.";
+        int fd;
+        int ret = 0;
+
+        struct config {
+                char *output_format;
+        };
+
+        struct config cfg = {
+                .output_format = "normal",
+        };
+
+        OPT_ARGS(opts) = {
+                OPT_FMT("output-format", 'o', &cfg.output_format,
+                        "output Format: normal|json"),
+                OPT_END()
+        };
+
+        fd = parse_and_open(argc, argv, desc, opts);
+        if (fd < 0)
+                return fd;
+
+        ret = get_c3_log_page(fd, cfg.output_format);
+        if (ret)
+                fprintf(stderr,
+                        "ERROR : OCP : Failure reading the C3 Log Page, ret = %d\n",
+                        ret);
+
+        return ret;
+}