qca-wifi: Add CFR capture test application

Add CFR capture test application with streamfs APIs.
This is test application to read CFR dump from driver

Change-Id: I6925646678d1e87ecef2fb5405e992246a6d4eb4
CRs-Fixed: 2372061

tools/linux/cfr_test_app.c

@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 2019 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * DOC: cfr capture test application
+ * This file provides test application to dump cfr capture from driver
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <stdint.h>
+#include <sys/time.h>
+#include <time.h>
+#include <signal.h>
+
+#define CFR_DUMP_STREAMFS_FILE "/sys/kernel/debug/%s/cfr_dump0"
+#define CFR_DUMP_FILE "/tmp/cfr_dump_%s.bin"
+
+#define MAX_CAPTURE_SIZE 2048
+static char rbuffer[MAX_CAPTURE_SIZE];
+
+int stop_capture;
+
+void print_usage(char *argv[])
+{
+	printf("Usage:cfr_test_app -i <interfacename>\n");
+}
+
+void streamfs_read_handler(int sfd, int cfd)
+{
+	int rlen = 0;
+
+	memset(rbuffer, 0, sizeof(rbuffer));
+	rlen = read(sfd, rbuffer, sizeof(rbuffer));
+	if (rlen <= 0)
+		return;
+
+	write(cfd, rbuffer, rlen);
+}
+
+int start_cfr_capture_daemon(int streamfs_fd, int cfr_dump_fd)
+{
+	fd_set sfs_fdset;
+	int maxfd = 0, retval = 0;
+
+	FD_ZERO(&sfs_fdset);
+	FD_SET(streamfs_fd, &sfs_fdset);
+	maxfd = streamfs_fd;
+
+	while (!stop_capture) {
+		retval = select(maxfd + 1, &sfs_fdset, NULL, NULL, NULL);
+		if (retval < 0) {
+			perror("select()");
+			exit(EXIT_FAILURE);
+		}
+
+		if (FD_ISSET(streamfs_fd, &sfs_fdset))
+			streamfs_read_handler(streamfs_fd, cfr_dump_fd);
+	}
+
+	close(streamfs_fd);
+	close(cfr_dump_fd);
+	return 0;
+}
+
+int open_streamfs_file(char *iface)
+{
+	int fd = -1;
+	char filename[128];
+
+	snprintf(filename, sizeof(filename), CFR_DUMP_STREAMFS_FILE, iface);
+	fd = open(filename, O_RDONLY);
+	return fd;
+}
+
+int initialize_cfr_dump_file(char *iface)
+{
+	int fd = -1;
+	static char filename[128];
+	char time[50] = {0};
+	struct timeval tv = {0};
+	time_t curtime = 0;
+	struct tm *tm_val = NULL;
+
+	gettimeofday(&tv, NULL);
+	curtime = tv.tv_sec;
+	tm_val = localtime(&curtime);
+	if (tm_val) {
+		strftime(time, 50, "%Y_%m_%d_%T", tm_val);
+		snprintf(filename, sizeof(filename), CFR_DUMP_FILE, time);
+		fd = open(filename, O_WRONLY | O_CREAT);
+	} else {
+		perror("Unable to get time value to generate filename \n");
+	}
+
+	return fd;
+}
+
+/* Signal Hnadler to overide CTRL+C */
+void sig_handler(int signum)
+{
+	stop_capture = 1;
+}
+
+int main(int argc, char *argv[])
+{
+	int option = 0;
+	char *iface = NULL;
+	int streamfs_fd = -1, cfr_dump_fd = -1;
+
+	while ((option = getopt(argc, argv, "i:")) != -1) {
+		switch (option) {
+		case 'i':
+			iface = optarg;
+			break;
+		default:
+			printf("Invalid argument\n");
+			print_usage(argv);
+			exit(EXIT_FAILURE);
+			break;
+		}
+	}
+
+	if (iface == NULL) {
+		printf("Invalid interface option\n");
+		exit(EXIT_FAILURE);
+	}
+
+	streamfs_fd = open_streamfs_file(iface);
+
+	if (streamfs_fd < 0) {
+		printf("Invalid interface: %s, CFR capture file not found\n", iface);
+		exit(EXIT_FAILURE);
+	}
+
+	cfr_dump_fd = initialize_cfr_dump_file(iface);
+
+	if (cfr_dump_fd < 0) {
+		printf(" Could not open CFR dump file for write\n");
+		close(streamfs_fd);
+		exit(EXIT_FAILURE);
+	}
+
+	printf("Starting CFR capture deamon, Press CTRL+C to exit \n");
+	signal(SIGINT, sig_handler);
+	start_cfr_capture_daemon(streamfs_fd, cfr_dump_fd);
+	return 0;
+}