RASCSI/cpp/monitor/sm_core.cpp

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//---------------------------------------------------------------------------
//
// SCSI Target Emulator RaSCSI Reloaded
// for Raspberry Pi
//
// Powered by XM6 TypeG Technology.
// Copyright (C) 2016-2020 GIMONS
//
//---------------------------------------------------------------------------
#include "shared/log.h"
#include "shared/rasutil.h"
#include "shared/rascsi_version.h"
#include "hal/gpiobus_factory.h"
#include "hal/gpiobus.h"
#include "monitor/sm_reports.h"
#include "monitor/sm_core.h"
#include "monitor/data_sample.h"
#include <sys/time.h>
#include <climits>
#include <csignal>
#include <iostream>
#include <getopt.h>
#include <sched.h>
using namespace std;
using namespace ras_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++];
}
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
{
LOGINFO("%s -i [input file json] -b [buffer size] [output file]", args[0])
LOGINFO(" -i [input file json] - scsimon will parse the json file instead of capturing new data")
LOGINFO(" If -i option is not specified, scsimon will read the gpio pins")
LOGINFO(" -b [buffer size] - Override the default buffer size of %d.", buff_size)
LOGINFO(" [output file] - Base name of the output files. The file extension (ex: .json)")
LOGINFO(" will be appended to this file name")
}
void ScsiMon::Banner() const
{
if (import_data) {
LOGINFO("Reading input file: %s", input_file_name.c_str())
}
else {
LOGINFO("Reading live data from the GPIO pins")
LOGINFO(" Connection type : %s", CONNECT_DESC.c_str())
}
LOGINFO(" Data buffer size: %u", buff_size)
LOGINFO(" ")
LOGINFO("Generating output files:")
LOGINFO(" %s - Value Change Dump file that can be opened with GTKWave", vcd_file_name.c_str())
LOGINFO(" %s - JSON file with raw data", json_file_name.c_str())
LOGINFO(" %s - HTML file with summary of commands", html_file_name.c_str())
}
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) {
LOGERROR("Unable to intiailize the GPIO bus. Exiting....")
return false;
}
running = false;
return true;
}
void ScsiMon::Cleanup() const
{
if (!import_data) {
LOGINFO("Stopping data collection....")
}
LOGINFO(" ")
LOGINFO("Generating %s...", vcd_file_name.c_str())
scsimon_generate_value_change_dump(vcd_file_name.c_str(), data_buffer, data_idx);
LOGINFO("Generating %s...", json_file_name.c_str())
scsimon_generate_json(json_file_name.c_str(), data_buffer, data_idx);
LOGINFO("Generating %s...", html_file_name.c_str())
scsimon_generate_html(html_file_name.c_str(), data_buffer, data_idx);
bus->Cleanup();
}
void ScsiMon::Reset() const
{
bus->Reset();
}
#ifdef DEBUG
static uint32_t high_bits = 0x0;
static uint32_t low_bits = 0xFFFFFFFF;
#endif
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");
ras_util::Banner("SCSI Monitor Capture Tool");
ParseArguments(args);
#ifdef DEBUG
uint32_t prev_high = high_bits;
uint32_t prev_low = low_bits;
#endif
uint32_t prev_sample = 0xFFFFFFFF;
uint32_t this_sample = 0;
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 = (data_capture *)calloc(buff_size, sizeof(data_capture_t));
if (import_data) {
data_idx = scsimon_read_json(input_file_name.c_str(), data_buffer, buff_size);
if (data_idx > 0)
{
LOGDEBUG("Read %d samples from %s", data_idx, input_file_name.c_str())
Cleanup();
}
exit(0);
}
LOGINFO(" ")
LOGINFO("Now collecting data.... Press CTRL-C to stop.")
LOGINFO(" ")
// 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);
LOGDEBUG("ALL_SCSI_PINS %08X\n", ALL_SCSI_PINS)
// Main Loop
while (running) {
// Work initialization
this_sample = (bus->Acquire() & ALL_SCSI_PINS);
loop_count++;
if (loop_count > LLONG_MAX - 1) {
LOGINFO("Maximum amount of time has elapsed. SCSIMON is terminating.")
running = false;
}
if (data_idx >= (buff_size - 2)) {
LOGINFO("Internal data buffer is full. SCSIMON is terminating.")
running = false;
}
if (this_sample != prev_sample) {
#ifdef DEBUG
// This is intended to be a debug check to see if every pin is set
// high and low at some point.
high_bits |= this_sample;
low_bits &= this_sample;
if ((high_bits != prev_high) || (low_bits != prev_low)) {
LOGDEBUG(" %08X %08X\n", high_bits, low_bits)
}
prev_high = high_bits;
prev_low = low_bits;
if ((data_idx % 1000) == 0) {
LOGDEBUG("%s", ("Collected " + to_string(data_idx) + " samples...").c_str())
}
#endif
data_buffer[data_idx].data = this_sample;
data_buffer[data_idx].timestamp = loop_count;
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[data_idx].data = this_sample;
data_buffer[data_idx].timestamp = 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);
LOGINFO("%s", ("Elapsed time: " + to_string(elapsed_us) + " microseconds (" + to_string(elapsed_us / 1000000)
+ " seconds").c_str())
LOGINFO("%s", ("Collected " + to_string(data_idx) + " changes").c_str())
ns_per_loop = (double)(elapsed_us * 1000) / (double)loop_count;
LOGINFO("%s", ("Read the SCSI bus " + to_string(loop_count) + " times with an average of "
+ to_string(ns_per_loop) + " ns for each read").c_str())
Cleanup();
init_exit:
exit(ret);
}