RASCSI/cpp/scsimon/sm_core.cpp

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//---------------------------------------------------------------------------
//
// SCSI Target Emulator PiSCSI
// for Raspberry Pi
//
// Powered by XM6 TypeG Technology.
// Copyright (C) 2016-2020 GIMONS
// Copyright (C) 2021-2022 akuker
//
//---------------------------------------------------------------------------
#include "scsimon/sm_core.h"
#include "hal/gpiobus.h"
#include "hal/gpiobus_factory.h"
#include "scsimon/sm_reports.h"
#include "hal/log.h"
#include "shared/piscsi_version.h"
#include "shared/piscsi_util.h"
#include <climits>
#include <csignal>
#include <getopt.h>
#include <iostream>
#include <sched.h>
#include <sys/time.h>
using namespace std;
using namespace piscsi_util;
void ScsiMon::KillHandler(int)
{
running = false;
}
void ScsiMon::ParseArguments(const vector<char *> &args)
{
int opt;
while ((opt = getopt(static_cast<int>(args.size()), args.data(), "-Hhb:i:")) != -1) {
switch (opt) {
// The three options below are kind of a compound option with two letters
case 'h':
case 'H':
print_help = true;
break;
case 'b':
buff_size = atoi(optarg);
break;
case 'i':
input_file_name = optarg;
import_data = true;
break;
case 1:
file_base_name = optarg;
break;
default:
cout << "default: " << optarg << endl;
break;
}
}
/* Process any remaining command line arguments (not options). */
if (optind < static_cast<int>(args.size())) {
while (optind < static_cast<int>(args.size())) {
file_base_name = args[optind];
optind++;
}
}
vcd_file_name = file_base_name;
vcd_file_name += ".vcd";
json_file_name = file_base_name;
json_file_name += ".json";
html_file_name = file_base_name;
html_file_name += ".html";
}
void ScsiMon::PrintHelpText(const vector<char *> &args) const
{
spdlog::info(string(args[0]) + " -i [input file json] -b [buffer size] [output file]");
spdlog::info(" -i [input file json] - scsimon will parse the json file instead of capturing new data");
spdlog::info(" If -i option is not specified, scsimon will read the gpio pins");
spdlog::info(" -b [buffer size] - Override the default buffer size of " + to_string(buff_size));
spdlog::info(" [output file] - Base name of the output files. The file extension (ex: .json)");
spdlog::info(" will be appended to this file name");
}
void ScsiMon::Banner() const
{
if (import_data) {
spdlog::info("Reading input file: " + input_file_name);
} else {
spdlog::info("Reading live data from the GPIO pins");
spdlog::info(" Connection type: " + CONNECT_DESC);
}
spdlog::info(" Data buffer size: " + to_string(buff_size));
spdlog::info(" ");
spdlog::info("Generating output files:");
spdlog::info(" " + vcd_file_name + " - Value Change Dump file that can be opened with GTKWave");
spdlog::info(" " + json_file_name + " - JSON file with raw data");
spdlog::info(" " + html_file_name + " - HTML file with summary of commands");
}
bool ScsiMon::Init()
{
// Interrupt handler settings
if (signal(SIGINT, KillHandler) == SIG_ERR) {
return false;
}
if (signal(SIGHUP, KillHandler) == SIG_ERR) {
return false;
}
if (signal(SIGTERM, KillHandler) == SIG_ERR) {
return false;
}
bus = GPIOBUS_Factory::Create(BUS::mode_e::TARGET);
if (bus == nullptr) {
spdlog::error("Unable to intiailize the GPIO bus. Exiting....");
return false;
}
running = false;
return true;
}
void ScsiMon::Cleanup() const
{
if (!import_data) {
spdlog::info("Stopping data collection ...");
}
spdlog::info(" ");
spdlog::info("Generating " + vcd_file_name + "...");
scsimon_generate_value_change_dump(vcd_file_name, data_buffer);
spdlog::info("Generating " + json_file_name + "...");
scsimon_generate_json(json_file_name, data_buffer);
spdlog::info("Generating " + html_file_name + "...");
scsimon_generate_html(html_file_name, data_buffer);
bus->Cleanup();
}
void ScsiMon::Reset() const
{
bus->Reset();
}
int ScsiMon::run(const vector<char *> &args)
{
#ifdef DEBUG
spdlog::set_level(spdlog::level::trace);
#else
spdlog::set_level(spdlog::level::info);
#endif
spdlog::set_pattern("%^[%l]%$ %v");
piscsi_util::Banner("(SCSI Monitor Capture Tool)");
ParseArguments(args);
shared_ptr<DataSample> prev_sample = nullptr;
shared_ptr<DataSample> this_sample = nullptr;
timeval start_time;
timeval stop_time;
uint64_t loop_count = 0;
timeval time_diff;
uint64_t elapsed_us;
if (print_help) {
PrintHelpText(args);
exit(0);
}
Banner();
data_buffer.reserve(buff_size);
if (import_data) {
data_idx = scsimon_read_json(input_file_name, data_buffer);
if (data_idx > 0) {
spdlog::debug("Read " + to_string(data_idx) + " samples from '" + input_file_name + "'");
Cleanup();
}
exit(0);
}
spdlog::info(" ");
spdlog::info("Now collecting data.... Press CTRL-C to stop.");
spdlog::info(" ");
// Initialize
int ret = 0;
if (!Init()) {
ret = EPERM;
goto init_exit;
}
// Reset
Reset();
#ifdef __linux__
// Set the affinity to a specific processor core
FixCpu(3);
// Scheduling policy setting (highest priority)
struct sched_param schparam;
schparam.sched_priority = sched_get_priority_max(SCHED_FIFO);
sched_setscheduler(0, SCHED_FIFO, &schparam);
#endif
// Start execution
running = true;
bus->SetACK(false);
(void)gettimeofday(&start_time, nullptr);
// Main Loop
while (running) {
loop_count++;
if (loop_count > LLONG_MAX - 1) {
spdlog::info("Maximum amount of time has elapsed. SCSIMON is terminating.");
running = false;
}
if (data_idx >= (buff_size - 2)) {
spdlog::info("Internal data buffer is full. SCSIMON is terminating.");
running = false;
}
this_sample = bus->GetSample(loop_count);
if ((prev_sample == nullptr) || (this_sample->GetRawCapture() != prev_sample->GetRawCapture())) {
data_buffer.push_back(this_sample);
data_idx++;
prev_sample = this_sample;
}
continue;
}
// Collect one last sample, otherwise it looks like the end of the data was cut off
if (data_idx < buff_size) {
data_buffer.push_back(bus->GetSample(loop_count));
data_idx++;
}
(void)gettimeofday(&stop_time, nullptr);
timersub(&stop_time, &start_time, &time_diff);
elapsed_us = ((time_diff.tv_sec * 1000000) + time_diff.tv_usec);
spdlog::info("Elapsed time: " + to_string(elapsed_us) + " microseconds (" + to_string(elapsed_us / 1000000) +
" seconds");
spdlog::info("Collected " + to_string(data_idx) + " changes");
ns_per_loop = (double)(elapsed_us * 1000) / (double)loop_count;
spdlog::info("Read the SCSI bus " + to_string(loop_count) + " times with an average of " +
to_string(ns_per_loop) + " ns for each read");
Cleanup();
init_exit:
exit(ret);
}