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RASCSI
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RASCSI/src/raspberrypi/scsimon.cpp

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//---------------------------------------------------------------------------
//
// SCSI Target Emulator RaSCSI Reloaded
// for Raspberry Pi
//
// Powered by XM6 TypeG Technology.
// Copyright (C) 2016-2020 GIMONS
//
//---------------------------------------------------------------------------
#include "os.h"
#include "log.h"
#include "hal/gpiobus.h"
#include "rascsi_version.h"
#include "spdlog/spdlog.h"
#include <sys/time.h>
#include <climits>
#include <csignal>
#include <sstream>
#include <iostream>
#include <getopt.h>
#include <sched.h>
#include "monitor/sm_reports.h"
#include "monitor/data_sample.h"
using namespace std;
static const int _MAX_FNAME = 256;
//---------------------------------------------------------------------------
//
// Variable declarations
//
//---------------------------------------------------------------------------
static volatile bool running; // Running flag
GPIOBUS bus; // GPIO Bus
DWORD buff_size = 1000000;
data_capture *data_buffer;
DWORD data_idx = 0;
double ns_per_loop;
bool print_help = false;
bool import_data = false;
// We don't really need to support 256 character file names - this causes
// all kinds of compiler warnings when the log filename can be up to 256
// characters. _MAX_FNAME/2 is just an arbitrary value.
char file_base_name[_MAX_FNAME / 2] = "log";
char vcd_file_name[_MAX_FNAME];
char json_file_name[_MAX_FNAME];
char html_file_name[_MAX_FNAME];
char input_file_name[_MAX_FNAME];
//---------------------------------------------------------------------------
//
// Signal Processing
//
//---------------------------------------------------------------------------
void KillHandler(int)
{
// Stop instruction
running = false;
}
void parse_arguments(int argc, char *argv[])
{
int opt;
while ((opt = getopt(argc, argv, "-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':
strncpy(input_file_name, optarg, sizeof(input_file_name)-1);
import_data = true;
break;
case 1:
strncpy(file_base_name, optarg, sizeof(file_base_name) - 5);
break;
default:
cout << "default: " << optarg << endl;
break;
}
}
/* Process any remaining command line arguments (not options). */
if (optind < argc)
{
while (optind < argc)
strncpy(file_base_name, argv[optind++], sizeof(file_base_name)-1);
}
strcpy(vcd_file_name, file_base_name);
strcat(vcd_file_name, ".vcd");
strcpy(json_file_name, file_base_name);
strcat(json_file_name, ".json");
strcpy(html_file_name, file_base_name);
strcat(html_file_name, ".html");
}
//---------------------------------------------------------------------------
//
// Copyright text
//
//---------------------------------------------------------------------------
void print_copyright_text(int, char *[])
{
LOGINFO("SCSI Monitor Capture Tool - part of RaSCSI(*^..^*) ")
LOGINFO("version %s (%s, %s)",
rascsi_get_version_string().c_str(),
__DATE__,
__TIME__)
LOGINFO("Powered by XM6 TypeG Technology ")
LOGINFO("Copyright (C) 2016-2020 GIMONS")
LOGINFO("Copyright (C) 2020-2022 Contributors to the RaSCSI project")
LOGINFO(" ")
}
//---------------------------------------------------------------------------
//
// Help text
//
//---------------------------------------------------------------------------
void print_help_text(int, char *argv[])
{
LOGINFO("%s -i [input file json] -b [buffer size] [output file]", argv[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")
}
//---------------------------------------------------------------------------
//
// Banner Output
//
//---------------------------------------------------------------------------
void Banner(int, char *[])
{
if (import_data)
{
LOGINFO("Reading input file: %s", input_file_name)
}
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)
LOGINFO(" %s - JSON file with raw data", json_file_name)
LOGINFO(" %s - HTML file with summary of commands", html_file_name)
}
//---------------------------------------------------------------------------
//
// Initialization
//
//---------------------------------------------------------------------------
bool 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;
}
// GPIO Initialization
if (!bus.Init())
{
LOGERROR("Unable to intiailize the GPIO bus. Exiting....")
return false;
}
// Bus Reset
bus.Reset();
// Other
running = false;
return true;
}
void Cleanup()
{
if (!import_data) {
LOGINFO("Stopping data collection....")
}
LOGINFO(" ")
LOGINFO("Generating %s...", vcd_file_name)
scsimon_generate_value_change_dump(vcd_file_name, data_buffer, data_idx);
LOGINFO("Generating %s...", json_file_name)
scsimon_generate_json(json_file_name, data_buffer, data_idx);
LOGINFO("Generating %s...", html_file_name)
scsimon_generate_html(html_file_name, data_buffer, data_idx);
// Cleanup the Bus
bus.Cleanup();
}
void Reset()
{
// Reset the bus
bus.Reset();
}
//---------------------------------------------------------------------------
//
// Pin the thread to a specific CPU (Only applies to Linux)
//
//---------------------------------------------------------------------------
#ifdef __linux__
void FixCpu(int cpu)
{
// Get the number of CPUs
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
sched_getaffinity(0, sizeof(cpu_set_t), &cpuset);
int cpus = CPU_COUNT(&cpuset);
// Set the thread affinity
if (cpu < cpus)
{
CPU_ZERO(&cpuset);
CPU_SET(cpu, &cpuset);
sched_setaffinity(0, sizeof(cpu_set_t), &cpuset);
}
}
#endif
#ifdef DEBUG
static DWORD high_bits = 0x0;
static DWORD low_bits = 0xFFFFFFFF;
#endif
//---------------------------------------------------------------------------
//
// Main processing
//
//---------------------------------------------------------------------------
int main(int argc, char *argv[])
{
#ifdef DEBUG
spdlog::set_level(spdlog::level::trace);
#else
spdlog::set_level(spdlog::level::info);
#endif
spdlog::set_pattern("%^[%l]%$ %v");
print_copyright_text(argc, argv);
parse_arguments(argc, argv);
#ifdef DEBUG
DWORD prev_high = high_bits;
DWORD prev_low = low_bits;
#endif
ostringstream s;
DWORD prev_sample = 0xFFFFFFFF;
DWORD this_sample = 0;
timeval start_time;
timeval stop_time;
uint64_t loop_count = 0;
timeval time_diff;
uint64_t elapsed_us;
if (print_help)
{
print_help_text(argc, argv);
exit(0);
}
// Output the Banner
Banner(argc, argv);
data_buffer = (data_capture *)calloc(buff_size, sizeof(data_capture_t));
if (import_data)
{
data_idx = scsimon_read_json(input_file_name, data_buffer, buff_size);
if (data_idx > 0)
{
LOGDEBUG("Read %d samples from %s", data_idx, input_file_name)
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.SetACT(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)
{
s.str("");
s << "Collected " << data_idx << " samples...";
LOGDEBUG("%s", s.str().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);
s.str("");
s << "Elapsed time: " << elapsed_us << " microseconds (" << elapsed_us / 1000000 << " seconds)";
LOGINFO("%s", s.str().c_str())
s.str("");
s << "Collected " << data_idx << " changes";
LOGINFO("%s", s.str().c_str())
// Note: ns_per_loop is a global variable that is used by Cleanup() to printout the timestamps.
ns_per_loop = (elapsed_us * 1000) / (double)loop_count;
s.str("");
s << "Read the SCSI bus " << loop_count << " times with an average of " << ns_per_loop << " ns for each read";
LOGINFO("%s", s.str().c_str())
Cleanup();
init_exit:
exit(ret);
}
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