Adding upstream version 2.8.upstream/2.8

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

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;
+}