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driver-icarus.c
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/*
* Copyright 2012-2015 Luke Dashjr
* Copyright 2012 Xiangfu
* Copyright 2014 Nate Woolls
* Copyright 2012 Andrew Smith
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at your option)
* any later version. See COPYING for more details.
*/
/*
* Those code should be works fine with V2 and V3 bitstream of Icarus.
* Operation:
* No detection implement.
* Input: 64B = 32B midstate + 20B fill bytes + last 12 bytes of block head.
* Return: send back 32bits immediately when Icarus found a valid nonce.
* no query protocol implemented here, if no data send back in ~11.3
* seconds (full cover time on 32bit nonce range by 380MH/s speed)
* just send another work.
* Notice:
* 1. Icarus will start calculate when you push a work to them, even they
* are busy.
* 2. The 2 FPGAs on Icarus will distribute the job, one will calculate the
* 0 ~ 7FFFFFFF, another one will cover the 80000000 ~ FFFFFFFF.
* 3. It's possible for 2 FPGAs both find valid nonce in the meantime, the 2
* valid nonce will all be send back.
* 4. Icarus will stop work when: a valid nonce has been found or 32 bits
* nonce range is completely calculated.
*/
#include "config.h"
#include "miner.h"
#include <limits.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>
#ifndef WIN32
#include <termios.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
#else
#include <windows.h>
#include <io.h>
#endif
#ifdef HAVE_SYS_EPOLL_H
#include <sys/epoll.h>
#define HAVE_EPOLL
#endif
#include "compat.h"
#include "dynclock.h"
#include "driver-icarus.h"
#include "lowl-vcom.h"
// The serial I/O speed - Linux uses a define 'B115200' in bits/termios.h
#define ICARUS_IO_SPEED 115200
// The number of bytes in a nonce (always 4)
// This is NOT the read-size for the Icarus driver
// That is defined in ICARUS_INFO->read_size
#define ICARUS_NONCE_SIZE 4
#define ASSERT1(condition) __maybe_unused static char sizeof_uint32_t_must_be_4[(condition)?1:-1]
ASSERT1(sizeof(uint32_t) == 4);
#define ICARUS_READ_TIME(baud, read_size) ((double)read_size * (double)8.0 / (double)(baud))
// Defined in deciseconds
// There's no need to have this bigger, since the overhead/latency of extra work
// is pretty small once you get beyond a 10s nonce range time and 10s also
// means that nothing slower than 429MH/s can go idle so most icarus devices
// will always mine without idling
#define ICARUS_READ_COUNT_LIMIT_MAX 100
// In timing mode: Default starting value until an estimate can be obtained
#define ICARUS_READ_COUNT_TIMING_MS 75
// For a standard Icarus REV3
#define ICARUS_REV3_HASH_TIME 0.00000000264083
// Icarus Rev3 doesn't send a completion message when it finishes
// the full nonce range, so to avoid being idle we must abort the
// work (by starting a new work) shortly before it finishes
//
// Thus we need to estimate 2 things:
// 1) How many hashes were done if the work was aborted
// 2) How high can the timeout be before the Icarus is idle,
// to minimise the number of work started
// We set 2) to 'the calculated estimate' - 1
// to ensure the estimate ends before idle
//
// The simple calculation used is:
// Tn = Total time in seconds to calculate n hashes
// Hs = seconds per hash
// Xn = number of hashes
// W = code overhead per work
//
// Rough but reasonable estimate:
// Tn = Hs * Xn + W (of the form y = mx + b)
//
// Thus:
// Line of best fit (using least squares)
//
// Hs = (n*Sum(XiTi)-Sum(Xi)*Sum(Ti))/(n*Sum(Xi^2)-Sum(Xi)^2)
// W = Sum(Ti)/n - (Hs*Sum(Xi))/n
//
// N.B. W is less when aborting work since we aren't waiting for the reply
// to be transferred back (ICARUS_READ_TIME)
// Calculating the hashes aborted at n seconds is thus just n/Hs
// (though this is still a slight overestimate due to code delays)
//
// Both below must be exceeded to complete a set of data
// Minimum how long after the first, the last data point must be
#define HISTORY_SEC 60
// Minimum how many points a single ICARUS_HISTORY should have
#define MIN_DATA_COUNT 5
// The value above used is doubled each history until it exceeds:
#define MAX_MIN_DATA_COUNT 100
static struct timeval history_sec = { HISTORY_SEC, 0 };
static const char *MODE_DEFAULT_STR = "default";
static const char *MODE_SHORT_STR = "short";
static const char *MODE_SHORT_STREQ = "short=";
static const char *MODE_LONG_STR = "long";
static const char *MODE_LONG_STREQ = "long=";
static const char *MODE_VALUE_STR = "value";
static const char *MODE_UNKNOWN_STR = "unknown";
#define END_CONDITION 0x0000ffff
#define DEFAULT_DETECT_THRESHOLD 1
BFG_REGISTER_DRIVER(icarus_drv)
extern const struct bfg_set_device_definition icarus_set_device_funcs[];
extern const struct bfg_set_device_definition icarus_set_device_funcs_live[];
extern void convert_icarus_to_cairnsmore(struct cgpu_info *);
static inline
uint32_t icarus_nonce32toh(const struct ICARUS_INFO * const info, const uint32_t nonce)
{
return info->nonce_littleendian ? le32toh(nonce) : be32toh(nonce);
}
#define icarus_open2(devpath, baud, purge) serial_open(devpath, baud, ICARUS_READ_FAULT_DECISECONDS, purge)
#define icarus_open(devpath, baud) icarus_open2(devpath, baud, false)
static
void icarus_log_protocol(const char * const repr, const void *buf, size_t bufLen, const char *prefix)
{
char hex[(bufLen * 2) + 1];
bin2hex(hex, buf, bufLen);
applog(LOG_DEBUG, "%s: DEVPROTO: %s %s", repr, prefix, hex);
}
int icarus_read(const char * const repr, uint8_t *buf, const int fd, struct timeval * const tvp_finish, struct thr_info * const thr, const struct timeval * const tvp_timeout, struct timeval * const tvp_now, int read_size)
{
int rv;
long remaining_ms;
ssize_t ret;
struct timeval tv_start = *tvp_now;
bool first = true;
// If there is no thr, then there's no work restart to watch..
#ifdef HAVE_EPOLL
bool watching_work_restart = !thr;
int epollfd;
struct epoll_event evr[2];
epollfd = epoll_create(2);
if (epollfd != -1) {
struct epoll_event ev = {
.events = EPOLLIN,
.data.fd = fd,
};
if (-1 == epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev)) {
applog(LOG_DEBUG, "%s: Error adding %s fd to epoll", "device", repr);
close(epollfd);
epollfd = -1;
}
else
if (thr && thr->work_restart_notifier[1] != -1)
{
ev.data.fd = thr->work_restart_notifier[0];
if (-1 == epoll_ctl(epollfd, EPOLL_CTL_ADD, thr->work_restart_notifier[0], &ev))
applog(LOG_DEBUG, "%s: Error adding %s fd to epoll", "work restart", repr);
else
watching_work_restart = true;
}
}
else
applog(LOG_DEBUG, "%s: Error creating epoll", repr);
if (epollfd == -1 && (remaining_ms = timer_remaining_us(tvp_timeout, tvp_now)) < 100000)
applog(LOG_WARNING, "%s: Failed to use epoll, and very short read timeout (%ldms)", repr, remaining_ms);
#endif
while (true) {
remaining_ms = timer_remaining_us(tvp_timeout, tvp_now) / 1000;
#ifdef HAVE_EPOLL
if (epollfd != -1)
{
if ((!watching_work_restart) && remaining_ms > 100)
remaining_ms = 100;
ret = epoll_wait(epollfd, evr, 2, remaining_ms);
timer_set_now(tvp_now);
switch (ret)
{
case -1:
if (unlikely(errno != EINTR))
return_via(out, rv = ICA_GETS_ERROR);
ret = 0;
break;
case 0: // timeout
// handled after switch
break;
case 1:
if (evr[0].data.fd != fd) // must be work restart notifier
{
notifier_read(thr->work_restart_notifier);
ret = 0;
break;
}
// fallthru to...
case 2: // device has data
ret = read(fd, buf, read_size);
break;
default:
return_via(out, rv = ICA_GETS_ERROR);
}
}
else
#endif
{
if (remaining_ms > 100)
remaining_ms = 100;
else
if (remaining_ms < 1)
remaining_ms = 1;
vcom_set_timeout_ms(fd, remaining_ms);
// Read first byte alone to get earliest tv_finish
ret = read(fd, buf, first ? 1 : read_size);
timer_set_now(tvp_now);
}
if (first)
*tvp_finish = *tvp_now;
if (ret)
{
if (unlikely(ret < 0))
return_via(out, rv = ICA_GETS_ERROR);
first = false;
if (opt_dev_protocol && opt_debug)
icarus_log_protocol(repr, buf, ret, "RECV");
if (ret >= read_size)
return_via(out, rv = ICA_GETS_OK);
read_size -= ret;
buf += ret;
// Always continue reading while data is coming in, ignoring the timeout
continue;
}
if (thr && thr->work_restart)
return_via_applog(out, rv = ICA_GETS_RESTART, LOG_DEBUG, "%s: Interrupted by work restart", repr);
if (timer_passed(tvp_timeout, tvp_now))
return_via_applog(out, rv = ICA_GETS_TIMEOUT, LOG_DEBUG, "%s: No data in %.3f seconds", repr, timer_elapsed_us(&tv_start, tvp_now) / 1e6);
}
out:
#ifdef HAVE_EPOLL
if (epollfd != -1)
close(epollfd);
#endif
return rv;
}
int icarus_write(const char * const repr, int fd, const void *buf, size_t bufLen)
{
size_t ret;
if (opt_dev_protocol && opt_debug)
icarus_log_protocol(repr, buf, bufLen, "SEND");
if (unlikely(fd == -1))
return 1;
ret = write(fd, buf, bufLen);
if (unlikely(ret != bufLen))
return 1;
return 0;
}
#define icarus_close(fd) serial_close(fd)
void do_icarus_close(struct thr_info *thr)
{
struct cgpu_info *icarus = thr->cgpu;
const int fd = icarus->device_fd;
if (fd == -1)
return;
icarus_close(fd);
icarus->device_fd = -1;
}
static const char *timing_mode_str(enum timing_mode timing_mode)
{
switch(timing_mode) {
case MODE_DEFAULT:
return MODE_DEFAULT_STR;
case MODE_SHORT:
return MODE_SHORT_STR;
case MODE_LONG:
return MODE_LONG_STR;
case MODE_VALUE:
return MODE_VALUE_STR;
default:
return MODE_UNKNOWN_STR;
}
}
static
const char *_icarus_set_timing(struct ICARUS_INFO * const info, const char * const repr, const struct device_drv * const drv, const char * const buf)
{
double Hs;
char *eq;
if (strcasecmp(buf, MODE_SHORT_STR) == 0) {
// short
info->read_timeout_ms = ICARUS_READ_COUNT_TIMING_MS;
info->read_count_limit = 0; // 0 = no limit
info->timing_mode = MODE_SHORT;
info->do_icarus_timing = true;
} else if (strncasecmp(buf, MODE_SHORT_STREQ, strlen(MODE_SHORT_STREQ)) == 0) {
// short=limit
info->read_timeout_ms = ICARUS_READ_COUNT_TIMING_MS;
info->timing_mode = MODE_SHORT;
info->do_icarus_timing = true;
info->read_count_limit = atoi(&buf[strlen(MODE_SHORT_STREQ)]);
if (info->read_count_limit < 0)
info->read_count_limit = 0;
if (info->read_count_limit > ICARUS_READ_COUNT_LIMIT_MAX)
info->read_count_limit = ICARUS_READ_COUNT_LIMIT_MAX;
} else if (strcasecmp(buf, MODE_LONG_STR) == 0) {
// long
info->read_timeout_ms = ICARUS_READ_COUNT_TIMING_MS;
info->read_count_limit = 0; // 0 = no limit
info->timing_mode = MODE_LONG;
info->do_icarus_timing = true;
} else if (strncasecmp(buf, MODE_LONG_STREQ, strlen(MODE_LONG_STREQ)) == 0) {
// long=limit
info->read_timeout_ms = ICARUS_READ_COUNT_TIMING_MS;
info->timing_mode = MODE_LONG;
info->do_icarus_timing = true;
info->read_count_limit = atoi(&buf[strlen(MODE_LONG_STREQ)]);
if (info->read_count_limit < 0)
info->read_count_limit = 0;
if (info->read_count_limit > ICARUS_READ_COUNT_LIMIT_MAX)
info->read_count_limit = ICARUS_READ_COUNT_LIMIT_MAX;
} else if ((Hs = atof(buf)) != 0) {
// ns[=read_count]
info->Hs = Hs / NANOSEC;
info->fullnonce = info->Hs * (((double)0xffffffff) + 1);
info->read_timeout_ms = 0;
if ((eq = strchr(buf, '=')) != NULL)
info->read_timeout_ms = atof(&eq[1]) * 100;
if (info->read_timeout_ms < 1)
{
info->read_timeout_ms = info->fullnonce * 1000;
if (unlikely(info->read_timeout_ms < 2))
info->read_timeout_ms = 1;
else
--info->read_timeout_ms;
}
info->read_count_limit = 0; // 0 = no limit
info->timing_mode = MODE_VALUE;
info->do_icarus_timing = false;
} else {
// Anything else in buf just uses DEFAULT mode
info->fullnonce = info->Hs * (((double)0xffffffff) + 1);
info->read_timeout_ms = 0;
if ((eq = strchr(buf, '=')) != NULL)
info->read_timeout_ms = atof(&eq[1]) * 100;
unsigned def_read_timeout_ms = ICARUS_READ_COUNT_TIMING_MS;
if (info->timing_mode == MODE_DEFAULT) {
if (drv == &icarus_drv) {
info->do_default_detection = 0x10;
} else {
def_read_timeout_ms = info->fullnonce * 1000;
if (def_read_timeout_ms > 0)
--def_read_timeout_ms;
}
info->do_icarus_timing = false;
}
if (info->read_timeout_ms < 1)
info->read_timeout_ms = def_read_timeout_ms;
info->read_count_limit = 0; // 0 = no limit
}
info->min_data_count = MIN_DATA_COUNT;
applog(LOG_DEBUG, "%s: Init: mode=%s read_timeout_ms=%u limit=%dms Hs=%e",
repr,
timing_mode_str(info->timing_mode),
info->read_timeout_ms, info->read_count_limit, info->Hs);
return NULL;
}
const char *icarus_set_timing(struct cgpu_info * const proc, const char * const optname, const char * const buf, char * const replybuf, enum bfg_set_device_replytype * const out_success)
{
struct ICARUS_INFO * const info = proc->device_data;
return _icarus_set_timing(info, proc->dev_repr, proc->drv, buf);
}
static uint32_t mask(int work_division)
{
return 0xffffffff / work_division;
}
// Number of bytes remaining after reading a nonce from Icarus
int icarus_excess_nonce_size(int fd, struct ICARUS_INFO *info)
{
// How big a buffer?
int excess_size = info->read_size - ICARUS_NONCE_SIZE;
// Try to read one more to ensure the device doesn't return
// more than we want for this driver
excess_size++;
unsigned char excess_bin[excess_size];
// Read excess_size from Icarus
struct timeval tv_now;
timer_set_now(&tv_now);
int bytes_read = read(fd, excess_bin, excess_size);
// Number of bytes that were still available
return bytes_read;
}
int icarus_probe_work_division(const int fd, const char * const repr, struct ICARUS_INFO * const info)
{
struct timeval tv_now, tv_timeout;
struct timeval tv_finish;
// For reading the nonce from Icarus
unsigned char res_bin[info->read_size];
// For storing the the 32-bit nonce
uint32_t res;
int work_division = 0;
applog(LOG_DEBUG, "%s: Work division not specified - autodetecting", repr);
// Special packet to probe work_division
unsigned char pkt[64] =
"\x2e\x4c\x8f\x91\xfd\x59\x5d\x2d\x7e\xa2\x0a\xaa\xcb\x64\xa2\xa0"
"\x43\x82\x86\x02\x77\xcf\x26\xb6\xa1\xee\x04\xc5\x6a\x5b\x50\x4a"
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
"\x64\x61\x01\x1a\xc9\x06\xa9\x51\xfb\x9b\x3c\x73";
icarus_write(repr, fd, pkt, sizeof(pkt));
memset(res_bin, 0, sizeof(res_bin));
timer_set_now(&tv_now);
timer_set_delay(&tv_timeout, &tv_now, info->read_timeout_ms * 1000);
if (ICA_GETS_OK == icarus_read(repr, res_bin, fd, &tv_finish, NULL, &tv_timeout, &tv_now, info->read_size))
{
memcpy(&res, res_bin, sizeof(res));
res = icarus_nonce32toh(info, res);
}
else
res = 0;
switch (res) {
case 0x04C0FDB4:
work_division = 1;
break;
case 0x82540E46:
work_division = 2;
break;
case 0x417C0F36:
work_division = 4;
break;
case 0x60C994D5:
work_division = 8;
break;
default:
applog(LOG_ERR, "%s: Work division autodetection failed (assuming 2): got %08x", repr, res);
work_division = 2;
}
applog(LOG_DEBUG, "%s: Work division autodetection got %08x (=%d)", repr, res, work_division);
return work_division;
}
struct cgpu_info *icarus_detect_custom(const char *devpath, struct device_drv *api, struct ICARUS_INFO *info)
{
struct timeval tv_start, tv_finish;
int fd;
unsigned char nonce_bin[ICARUS_NONCE_SIZE];
char nonce_hex[(sizeof(nonce_bin) * 2) + 1];
drv_set_defaults(api, icarus_set_device_funcs, info, devpath, detectone_meta_info.serial, 1);
int baud = info->baud;
int work_division = info->work_division;
int fpga_count = info->fpga_count;
applog(LOG_DEBUG, "%s: Attempting to open %s", api->dname, devpath);
fd = icarus_open2(devpath, baud, true);
if (unlikely(fd == -1)) {
applog(LOG_DEBUG, "%s: Failed to open %s", api->dname, devpath);
return NULL;
}
// Set a default so that individual drivers need not specify
// e.g. Cairnsmore
BFGINIT(info->probe_read_count, 1);
if (info->read_size == 0)
info->read_size = ICARUS_DEFAULT_READ_SIZE;
if (!info->golden_ob)
{
// Block 171874 nonce = (0xa2870100) = 0x000187a2
// NOTE: this MUST take less time to calculate
// than the timeout set in icarus_open()
// This one takes ~0.53ms on Rev3 Icarus
info->golden_ob =
"4679ba4ec99876bf4bfe086082b40025"
"4df6c356451471139a3afa71e48f544a"
"00000000000000000000000000000000"
"0000000087320b1a1426674f2fa722ce";
/* NOTE: This gets sent to basically every port specified in --scan-serial,
* even ones that aren't Icarus; be sure they can all handle it, when
* this is changed...
* BitForce: Ignores entirely
* ModMiner: Starts (useless) work, gets back to clean state
*/
info->golden_nonce = "000187a2";
}
if (info->detect_init_func)
info->detect_init_func(devpath, fd, info);
int ob_size = strlen(info->golden_ob) / 2;
unsigned char ob_bin[ob_size];
BFGINIT(info->ob_size, ob_size);
if (!info->ignore_golden_nonce)
{
hex2bin(ob_bin, info->golden_ob, sizeof(ob_bin));
icarus_write(devpath, fd, ob_bin, sizeof(ob_bin));
cgtime(&tv_start);
memset(nonce_bin, 0, sizeof(nonce_bin));
// Do not use info->read_size here, instead read exactly ICARUS_NONCE_SIZE
// We will then compare the bytes left in fd with info->read_size to determine
// if this is a valid device
struct timeval tv_now, tv_timeout;
timer_set_now(&tv_now);
timer_set_delay(&tv_timeout, &tv_now, info->probe_read_count * 100000);
icarus_read(devpath, nonce_bin, fd, &tv_finish, NULL, &tv_timeout, &tv_now, ICARUS_NONCE_SIZE);
// How many bytes were left after reading the above nonce
int bytes_left = icarus_excess_nonce_size(fd, info);
icarus_close(fd);
bin2hex(nonce_hex, nonce_bin, sizeof(nonce_bin));
if (strncmp(nonce_hex, info->golden_nonce, 8))
{
applog(LOG_DEBUG,
"%s: "
"Test failed at %s: get %s, should: %s",
api->dname,
devpath, nonce_hex, info->golden_nonce);
return NULL;
}
if (info->read_size - ICARUS_NONCE_SIZE != bytes_left)
{
applog(LOG_DEBUG,
"%s: "
"Test failed at %s: expected %d bytes, got %d",
api->dname,
devpath, info->read_size, ICARUS_NONCE_SIZE + bytes_left);
return NULL;
}
}
else
icarus_close(fd);
applog(LOG_DEBUG,
"%s: "
"Test succeeded at %s: got %s",
api->dname,
devpath, nonce_hex);
if (serial_claim_v(devpath, api))
return NULL;
_icarus_set_timing(info, devpath, api, "");
if (!info->fpga_count)
{
if (!info->work_division)
{
fd = icarus_open2(devpath, baud, true);
info->work_division = icarus_probe_work_division(fd, api->dname, info);
icarus_close(fd);
}
info->fpga_count = info->work_division;
}
// Lock fpga_count from set_work_division
info->user_set |= IUS_FPGA_COUNT;
/* We have a real Icarus! */
struct cgpu_info *icarus;
icarus = calloc(1, sizeof(struct cgpu_info));
icarus->drv = api;
icarus->device_path = strdup(devpath);
icarus->device_fd = -1;
icarus->threads = 1;
icarus->procs = info->fpga_count;
icarus->device_data = info;
icarus->set_device_funcs = icarus_set_device_funcs_live;
add_cgpu(icarus);
applog(LOG_INFO, "Found %s at %s",
icarus->dev_repr,
devpath);
applog(LOG_DEBUG, "%s: Init: baud=%d work_division=%d fpga_count=%d",
icarus->dev_repr,
baud, work_division, fpga_count);
timersub(&tv_finish, &tv_start, &(info->golden_tv));
return icarus;
}
static bool icarus_detect_one(const char *devpath)
{
struct ICARUS_INFO *info = calloc(1, sizeof(struct ICARUS_INFO));
if (unlikely(!info))
quit(1, "Failed to malloc ICARUS_INFO");
// TODO: try some higher speeds with the Icarus and BFL to see
// if they support them and if setting them makes any difference
// N.B. B3000000 doesn't work on Icarus
info->baud = ICARUS_IO_SPEED;
info->reopen_mode = IRM_TIMEOUT;
info->Hs = ICARUS_REV3_HASH_TIME;
info->timing_mode = MODE_DEFAULT;
info->read_size = ICARUS_DEFAULT_READ_SIZE;
if (!icarus_detect_custom(devpath, &icarus_drv, info)) {
free(info);
return false;
}
return true;
}
static
bool icarus_lowl_probe(const struct lowlevel_device_info * const info)
{
return vcom_lowl_probe_wrapper(info, icarus_detect_one);
}
static bool icarus_prepare(struct thr_info *thr)
{
struct cgpu_info *icarus = thr->cgpu;
struct icarus_state *state;
thr->cgpu_data = state = calloc(1, sizeof(*state));
state->firstrun = true;
#ifdef HAVE_EPOLL
int epollfd = epoll_create(2);
if (epollfd != -1)
{
close(epollfd);
notifier_init(thr->work_restart_notifier);
}
#endif
icarus->status = LIFE_INIT2;
return true;
}
bool icarus_init(struct thr_info *thr)
{
struct cgpu_info *icarus = thr->cgpu;
struct ICARUS_INFO *info = icarus->device_data;
struct icarus_state * const state = thr->cgpu_data;
int fd = icarus_open2(icarus->device_path, info->baud, true);
icarus->device_fd = fd;
if (unlikely(-1 == fd)) {
applog(LOG_ERR, "%s: Failed to open %s",
icarus->dev_repr,
icarus->device_path);
return false;
}
applog(LOG_INFO, "%s: Opened %s", icarus->dev_repr, icarus->device_path);
BFGINIT(info->job_start_func, icarus_job_start);
BFGINIT(state->ob_bin, calloc(1, info->ob_size));
if (!info->work_division)
info->work_division = icarus_probe_work_division(fd, icarus->dev_repr, info);
if (!is_power_of_two(info->work_division))
info->work_division = upper_power_of_two_u32(info->work_division);
info->nonce_mask = mask(info->work_division);
return true;
}
static
const struct cgpu_info *icarus_proc_for_nonce(const struct cgpu_info * const icarus, const uint32_t nonce)
{
struct ICARUS_INFO * const info = icarus->device_data;
unsigned proc_id = 0;
for (int i = info->work_division, j = 0; i /= 2; ++j)
if (nonce & (1UL << (31 - j)))
proc_id |= (1 << j);
const struct cgpu_info * const proc = device_proc_by_id(icarus, proc_id) ?: icarus;
return proc;
}
static bool icarus_reopen(struct cgpu_info *icarus, struct icarus_state *state, int *fdp)
{
struct ICARUS_INFO *info = icarus->device_data;
// Reopen the serial port to workaround a USB-host-chipset-specific issue with the Icarus's buggy USB-UART
do_icarus_close(icarus->thr[0]);
*fdp = icarus->device_fd = icarus_open(icarus->device_path, info->baud);
if (unlikely(-1 == *fdp)) {
applog(LOG_ERR, "%s: Failed to reopen on %s", icarus->dev_repr, icarus->device_path);
dev_error(icarus, REASON_DEV_COMMS_ERROR);
state->firstrun = true;
return false;
}
return true;
}
static
bool icarus_job_prepare(struct thr_info *thr, struct work *work, __maybe_unused uint64_t max_nonce)
{
struct cgpu_info * const icarus = thr->cgpu;
struct icarus_state * const state = thr->cgpu_data;
uint8_t * const ob_bin = state->ob_bin;
swab256(ob_bin, work->midstate);
bswap_96p(&ob_bin[0x34], &work->data[0x40]);
if (!(memcmp(&ob_bin[56], "\xff\xff\xff\xff", 4)
|| memcmp(&ob_bin[0], "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32))) {
// This sequence is used on cairnsmore bitstreams for commands, NEVER send it otherwise
applog(LOG_WARNING, "%s: Received job attempting to send a command, corrupting it!",
icarus->dev_repr);
ob_bin[56] = 0;
}
return true;
}
bool icarus_job_start(struct thr_info *thr)
{
struct cgpu_info *icarus = thr->cgpu;
struct ICARUS_INFO *info = icarus->device_data;
struct icarus_state *state = thr->cgpu_data;
const uint8_t * const ob_bin = state->ob_bin;
int fd = icarus->device_fd;
int ret;
// Handle dynamic clocking for "subclass" devices
// This needs to run before sending next job, since it hashes the command too
if (info->dclk.freqM && likely(!state->firstrun)) {
dclk_preUpdate(&info->dclk);
dclk_updateFreq(&info->dclk, info->dclk_change_clock_func, thr);
}
cgtime(&state->tv_workstart);
ret = icarus_write(icarus->dev_repr, fd, ob_bin, info->ob_size);
if (ret) {
do_icarus_close(thr);
applog(LOG_ERR, "%s: Comms error (werr=%d)", icarus->dev_repr, ret);
dev_error(icarus, REASON_DEV_COMMS_ERROR);
return false; /* This should never happen */
}
return true;
}
static
struct work *icarus_process_worknonce(const struct ICARUS_INFO * const info, struct icarus_state *state, uint32_t *nonce)
{
*nonce = icarus_nonce32toh(info, *nonce);
if (test_nonce(state->last_work, *nonce, false))
return state->last_work;
if (likely(state->last2_work && test_nonce(state->last2_work, *nonce, false)))
return state->last2_work;
return NULL;
}
static
void handle_identify(struct thr_info * const thr, int ret, const bool was_first_run)
{
const struct cgpu_info * const icarus = thr->cgpu;
const struct ICARUS_INFO * const info = icarus->device_data;
struct icarus_state * const state = thr->cgpu_data;
int fd = icarus->device_fd;
struct timeval tv_now;
struct timeval tv_timeout, tv_finish;
double delapsed;
// For reading the nonce from Icarus
unsigned char nonce_bin[info->read_size];
// For storing the the 32-bit nonce
uint32_t nonce;
if (fd == -1)
return;
// If identify is requested (block erupters):
// 1. Don't start the next job right away (above)
// 2. Wait for the current job to complete 100%
if (!was_first_run)
{
applog(LOG_DEBUG, "%s: Identify: Waiting for current job to finish", icarus->dev_repr);
while (true)
{
cgtime(&tv_now);
delapsed = tdiff(&tv_now, &state->tv_workstart);
if (delapsed + 0.1 > info->fullnonce)
break;
// Try to get more nonces (ignoring work restart)
memset(nonce_bin, 0, sizeof(nonce_bin));
timer_set_delay(&tv_timeout, &tv_now, (uint64_t)(info->fullnonce - delapsed) * 1000000);
ret = icarus_read(icarus->dev_repr, nonce_bin, fd, &tv_finish, NULL, &tv_timeout, &tv_now, info->read_size);
if (ret == ICA_GETS_OK)
{
memcpy(&nonce, nonce_bin, sizeof(nonce));
nonce = icarus_nonce32toh(info, nonce);
submit_nonce(icarus_proc_for_nonce(icarus, nonce)->thr[0], state->last_work, nonce);
}
}
}
else
applog(LOG_DEBUG, "%s: Identify: Current job should already be finished", icarus->dev_repr);
// 3. Delay 3 more seconds
applog(LOG_DEBUG, "%s: Identify: Leaving idle for 3 seconds", icarus->dev_repr);
cgsleep_ms(3000);
// Check for work restart in the meantime
if (thr->work_restart)
{
applog(LOG_DEBUG, "%s: Identify: Work restart requested during delay", icarus->dev_repr);
goto no_job_start;
}
// 4. Start next job
if (!state->firstrun)
{
applog(LOG_DEBUG, "%s: Identify: Starting next job", icarus->dev_repr);
if (!info->job_start_func(thr))
no_job_start:
state->firstrun = true;
}
state->identify = false;
}
static
void icarus_transition_work(struct icarus_state *state, struct work *work)
{
if (state->last2_work)
free_work(state->last2_work);
state->last2_work = state->last_work;
state->last_work = copy_work(work);
}
static int64_t icarus_scanhash(struct thr_info *thr, struct work *work,
__maybe_unused int64_t max_nonce)
{
struct cgpu_info *icarus;
int fd;
int ret;
struct ICARUS_INFO *info;
struct work *nonce_work;
int64_t hash_count;
struct timeval tv_start = {.tv_sec=0}, elapsed;
struct timeval tv_history_start, tv_history_finish;
struct timeval tv_now, tv_timeout;
double Ti, Xi;
int i;
bool was_hw_error = false;
bool was_first_run;
struct ICARUS_HISTORY *history0, *history;
int count;
double Hs, W, fullnonce;
int read_timeout_ms;
bool limited;
uint32_t values;
int64_t hash_count_range;
elapsed.tv_sec = elapsed.tv_usec = 0;
icarus = thr->cgpu;
struct icarus_state *state = thr->cgpu_data;
was_first_run = state->firstrun;
icarus->drv->job_prepare(thr, work, max_nonce);
// Wait for the previous run's result
fd = icarus->device_fd;
info = icarus->device_data;
// For reading the nonce from Icarus
unsigned char nonce_bin[info->read_size];
// For storing the the 32-bit nonce
uint32_t nonce;
if (unlikely(fd == -1) && !icarus_reopen(icarus, state, &fd))
return -1;
if (!state->firstrun) {
if (state->changework)
{
state->changework = false;
ret = ICA_GETS_RESTART;
}
else
{
read_timeout_ms = info->read_timeout_ms;
keepwaiting:
/* Icarus will return info->read_size bytes nonces or nothing */
memset(nonce_bin, 0, sizeof(nonce_bin));
timer_set_now(&tv_now);
timer_set_delay(&tv_timeout, &tv_now, read_timeout_ms * 1000);
ret = icarus_read(icarus->dev_repr, nonce_bin, fd, &state->tv_workfinish, thr, &tv_timeout, &tv_now, info->read_size);
switch (ret) {
case ICA_GETS_RESTART:
// The prepared work is invalid, and the current work is abandoned
// Go back to the main loop to get the next work, and stuff
// Returning to the main loop will clear work_restart, so use a flag...
state->changework = true;
return 0;
case ICA_GETS_ERROR:
do_icarus_close(thr);
applog(LOG_ERR, "%s: Comms error (rerr)", icarus->dev_repr);
dev_error(icarus, REASON_DEV_COMMS_ERROR);
if (!icarus_reopen(icarus, state, &fd))
return -1;
break;
case ICA_GETS_TIMEOUT:
if (info->reopen_mode == IRM_TIMEOUT && !icarus_reopen(icarus, state, &fd))
return -1;
case ICA_GETS_OK: