diff options
Diffstat (limited to 'plugins/solidigm/solidigm-telemetry/nlog.c')
| -rw-r--r-- | plugins/solidigm/solidigm-telemetry/nlog.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/plugins/solidigm/solidigm-telemetry/nlog.c b/plugins/solidigm/solidigm-telemetry/nlog.c new file mode 100644 index 0000000..926772b --- /dev/null +++ b/plugins/solidigm/solidigm-telemetry/nlog.c @@ -0,0 +1,131 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright (c) 2023 Solidigm. + * + * Author: leonardo.da.cunha@solidigm.com + */ + +#include "nlog.h" +#include "config.h" +#include <string.h> +#include <stdio.h> + +#include "ccan/ilog/ilog.h" + +#define LOG_ENTRY_HEADER_SIZE 1 +#define LOG_ENTRY_TIMESTAMP_SIZE 2 +#define LOG_ENTRY_NUM_ARGS_MAX 8 +#define LOG_ENTRY_MAX_SIZE (LOG_ENTRY_HEADER_SIZE + LOG_ENTRY_TIMESTAMP_SIZE + \ + LOG_ENTRY_NUM_ARGS_MAX) +#define NUM_ARGS_MASK ((1 << ((int)STATIC_ILOG_32(LOG_ENTRY_NUM_ARGS_MAX))) - 1) +#define MAX_HEADER_MISMATCH_TRACK 10 + +static int formats_find(struct json_object *formats, uint32_t val, struct json_object **format) +{ + char hex_header[STR_HEX32_SIZE]; + + snprintf(hex_header, STR_HEX32_SIZE, "0x%08X", val); + return json_object_object_get_ex(formats, hex_header, format); +} + +static uint32_t nlog_get_pos(const uint32_t *nlog, const uint32_t nlog_size, int pos) +{ + return nlog[pos % nlog_size]; +} + +static uint32_t nlog_get_events(const uint32_t *nlog, const uint32_t nlog_size, int start_offset, + struct json_object *formats, struct json_object *events, uint32_t *tail_mismatches) +{ + uint32_t event_count = 0; + int last_bad_header_pos = nlog_size + 1; // invalid nlog offset + uint32_t tail_count = 0; + + for (int i = nlog_size - start_offset - 1; i >= -start_offset; i--) { + struct json_object *format; + uint32_t header = nlog_get_pos(nlog, nlog_size, i); + uint32_t num_data; + + if (header == 0 || !formats_find(formats, header, &format)) { + if (event_count > 0) { + //check if fould circular buffer tail + if (i != (last_bad_header_pos - 1)) { + if (tail_mismatches && + (tail_count < MAX_HEADER_MISMATCH_TRACK)) + tail_mismatches[tail_count] = header; + tail_count++; + } + last_bad_header_pos = i; + } + continue; + } + num_data = header & NUM_ARGS_MASK; + if (events) { + struct json_object *event = json_object_new_array(); + struct json_object *param = json_object_new_array(); + uint32_t val = nlog_get_pos(nlog, nlog_size, i - 1); + + json_object_array_add(events, event); + json_object_array_add(event, json_object_new_int64(val)); + val = nlog_get_pos(nlog, nlog_size, i - 2); + json_object_array_add(event, json_object_new_int64(val)); + json_object_array_add(event, json_object_new_int64(header)); + json_object_array_add(event, param); + for (uint32_t j = 0; j < num_data; j++) { + val = nlog_get_pos(nlog, nlog_size, i - 3 - j); + json_object_array_add(param, json_object_new_int64(val)); + } + json_object_get(format); + json_object_array_add(event, format); + } + i -= 2 + num_data; + event_count++; + } + return tail_count; +} + +int solidigm_nlog_parse(const char *buffer, uint64_t buff_size, struct json_object *formats, + struct json_object *metadata, struct json_object *output) +{ + uint32_t smaller_tail_count = UINT32_MAX; + int best_offset = 0; + uint32_t offset_tail_mismatches[LOG_ENTRY_MAX_SIZE][MAX_HEADER_MISMATCH_TRACK]; + struct json_object *events = json_object_new_array(); + const uint32_t *nlog = (uint32_t *)buffer; + const uint32_t nlog_size = buff_size / sizeof(uint32_t); + + for (int i = 0; i < LOG_ENTRY_MAX_SIZE; i++) { + uint32_t tail_count = nlog_get_events(nlog, nlog_size, i, formats, NULL, + offset_tail_mismatches[i]); + if (tail_count < smaller_tail_count) { + best_offset = i; + smaller_tail_count = tail_count; + } + if (tail_count == 0) + break; + } + if (smaller_tail_count > 1) { + const char *name = ""; + int media_bank = -1; + char str_mismatches[(STR_HEX32_SIZE + 1) * MAX_HEADER_MISMATCH_TRACK]; + int pos = 0; + int show_mismatch_num = smaller_tail_count < MAX_HEADER_MISMATCH_TRACK ? + smaller_tail_count : MAX_HEADER_MISMATCH_TRACK; + struct json_object *jobj; + + if (json_object_object_get_ex(metadata, "objName", &jobj)) + name = json_object_get_string(jobj); + if (json_object_object_get_ex(metadata, "mediaBankId", &jobj)) + media_bank = json_object_get_int(jobj); + + for (int i = 0; i < show_mismatch_num; i++) + pos += snprintf(&str_mismatches[pos], STR_HEX32_SIZE + 1, "0x%08X ", + offset_tail_mismatches[best_offset][i]); + + SOLIDIGM_LOG_WARNING("%s:%d with %d header mismatches ( %s). Configuration file may be missing format headers.", + name, media_bank, smaller_tail_count, str_mismatches); + } + nlog_get_events(nlog, nlog_size, best_offset, formats, events, NULL); + + json_object_object_add(output, "events", events); + return 0; +} |