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driver-lketc.c
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driver-lketc.c
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/*
* Copyright 2013-2014 Con Kolivas <kernel@kolivas.org>
* Copyright 2014 Lketc Integrated Systems Limited
* Copyright 2014 Dominik Lehner
*
* 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.
*/
#include "config.h"
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#ifndef WIN32
#include <sys/select.h>
#include <termios.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
#else
#include "compat.h"
#include <windows.h>
#include <io.h>
#endif
#include "miner.h"
#include "usbutils.h"
#include "fpgautils.h"
#include "elist.h"
#include "util.h"
#include "driver-lketc.h"
#define using_libusb(info) ((info)->using_libusb > 0)
#define using_serial(info) ((info)->using_libusb == 0)
// Configuration options
extern bool opt_lketc_debug;
extern int opt_lketc_chips_count; // number of Lketc chips chained together
extern int opt_lketc_chip_clk; // frequency to run chips with
extern bool opt_lketc_nocheck_golden; // bypass hashrate check
//static int opt_lketc_chips_count_max = 1; // smallest power of 2 >= opt_lketc_chips_count
// is currently auto-calculated
// Index for device-specific options
//static int option_offset = -1;
// Unset upon first hotplug check
static bool initial_startup_phase = true;
static struct name_chip_map {
char *model_name;
int chips_count;
} lketc_models[] = {
{ "lketc", 1 },
{ "Twins", 2 },
{ NULL, 0 }
};
/************************************************************
* Utility Functions
************************************************************/
static void flush_uart(int fd)
{
#ifdef WIN32
const HANDLE fh = (HANDLE)_get_osfhandle(fd);
PurgeComm(fh, PURGE_RXCLEAR);
#else
tcflush(fd, TCIFLUSH);
#endif
}
/*static int __maybe_unused flush_fd(int fd)
{
static char discard[10];
return read(fd, discard, sizeof(discard));
}
*/
static void rev(unsigned char *s, size_t l)
{
size_t i, j;
unsigned char t;
for (i = 0, j = l - 1; i < j; i++, j--) {
t = s[i];
s[i] = s[j];
s[j] = t;
}
}
static int log_2(int value)
{
int x = 0;
while (value > 1) {
value >>= 1;
x++;
}
return x;
}
/*static uint32_t __maybe_unused chip_index(uint32_t value, int bit_num)
{
uint32_t newvalue = 0;
int i;
// isolate bits 19-28, then shift right to get the
// highest bits that distinguish multiple chips
value = (value & 0x1ff80000) >> (29 - bit_num);
for (i = 0; i < bit_num; i++) {
newvalue = newvalue << 1;
newvalue += value & 0x01;
value = value >> 1;
}
return newvalue;
}
*/
static int lowest_pow2(int min)
{
int i;
for (i = 1; i < 1024; i = i * 2) {
if (min <= i){
return i;
}
}
return 1024;
}
static void notify_send_work_thread(struct cgpu_info *lketc)
{
struct LKETC_INFO *info = lketc->device_data;
cgsem_post(&info->wusem);
}
/************************************************************
* I/O helper functions
************************************************************/
#define lketc_serial_open_detect(devpath, baud, purge) serial_open_ex(devpath, baud, LKETC_READ_FAULT_DECISECONDS, 0, purge, true)
#define lketc_serial_open(devpath, baud, purge) serial_open_ex(devpath, baud, LKETC_READ_FAULT_DECISECONDS, 0, purge, true)
#define lketc_serial_close(fd) close(fd)
static bool lketc_reopen(struct cgpu_info *lketc)
{
struct LKETC_INFO *info = lketc->device_data;
int try, fd = -1;
if (!using_serial(info)) // sanity check
return false;
if (info->device_fd != -1) {
applog(LOG_DEBUG, "Closing %s%d on %s (fd=%d)",
lketc->drv->name, lketc->device_id, lketc->device_path, info->device_fd);
lketc_serial_close(info->device_fd);
info->device_fd = -1;
cgsleep_ms(2000);
}
applog(LOG_DEBUG, "Attempting to open %s%d on %s",
lketc->drv->name, lketc->device_id, lketc->device_path);
for (try = 0; try < 3; ++try) {
fd = lketc_serial_open(lketc->device_path, info->baud, true);
if (likely(fd > -1))
break;
cgsleep_ms(3000);
}
if (unlikely(fd < 0)) {
applog(LOG_ERR, "Failed to open %s%d on %s (%d attempts)",
lketc->drv->name, lketc->device_id, lketc->device_path, try);
return false;
}
info->device_fd = fd;
applog(LOG_DEBUG, "Successfully opened %s%d on %s (%d attempts, fd=%d)",
lketc->drv->name, lketc->device_id, lketc->device_path, try, info->device_fd);
return true;
}
static int lketc_serial_write(int fd, const void *buf, size_t len)
{
ssize_t ret;
size_t total = 0;
#if LKETC_PROTOCOL_DEBUG
if (opt_lketc_debug) {
char *hexstr;
hexstr = bin2hex(buf, len);
applog(LOG_DEBUG, "> %s", hexstr);
free(hexstr);
}
#endif
while (total < len) {
#ifndef WIN32
ret = write(fd, buf, len);
#else
ret = win32write(fd, buf, len);
#endif
if (ret < 0) {
applog(LOG_ERR, "lketc_serial_write (%d): error on write: %s", fd, strerror(errno));
return -1;
}
total += (size_t)ret;
}
return total;
}
static int lketc_serial_read(int fd, void *buf, size_t len, int read_count, struct timeval *tv_firstbyte)
{
ssize_t ret;
size_t total = 0;
int rc = 0;
while (total < len) {
#ifndef WIN32
ret = read(fd, buf + total, len - total);
#else
ret = win32read(fd, buf + total, len - total);
#endif
if (ret < 0) {
applog(LOG_ERR, "lketc_serial_read (%d): error on read: %s", fd, strerror(errno));
return -1;
}
if (tv_firstbyte != NULL && total == 0)
cgtime(tv_firstbyte);
applog(LOG_DEBUG, "lketc_serial_read: read returned %d", (int)ret);
if (ret == 0 && ++rc >= read_count)
break;
total += (size_t)ret;
}
/*#if LKETC_PROTOCOL_DEBUG
if (opt_lketc_debug) {
char *hexstr;
if (total > 0) {
hexstr = bin2hex(buf, total);
applog(LOG_DEBUG, "< %s", hexstr);
free(hexstr);
} else {
applog(LOG_DEBUG, "< (no data)");
}
}
#endif
*/
return total;
}
/************************************************************
* Detection and setup
************************************************************/
static unsigned char lketc_clk_to_freqcode(int clkfreq)
{
if (clkfreq > LKETC_CLK_MAX) {
applog(LOG_WARNING, "Clock frequency %d too high, resetting to %d",
clkfreq, LKETC_CLK_MAX);
clkfreq = LKETC_CLK_MAX;
}
if (clkfreq < LKETC_CLK_MIN) {
applog(LOG_WARNING, "Clock frequency %d too low, resetting to %d",
clkfreq, LKETC_CLK_MIN);
clkfreq = LKETC_CLK_MIN;
}
return (unsigned char)((double)clkfreq * 2. / 3.);
}
static void lketc_get_device_options(const char *devid, int *chips_count, int *chip_clk, const char *options)
{
char *p, *all, *found = NULL;
long lval;
int index = 0;
char *lastslsh = MAX(strrchr(devid, '/'), strrchr(devid, '\\'));
if (lastslsh != NULL)
++lastslsh;
// set global default options
*chips_count = (opt_lketc_chips_count) ? opt_lketc_chips_count : LKETC_MIN_CHIPS;
*chip_clk = (opt_lketc_chip_clk) ? opt_lketc_chip_clk : LKETC_CLK_MIN;
if (options == NULL)
return;
all = strdup(options);
for (p = strtok(all, ";"); p != NULL; p = strtok(NULL, ";")) {
if (strncmp(p, devid, strlen(devid)) == 0) {
found = p;
break;
}
if (lastslsh != NULL && strncmp(p, lastslsh, strlen(lastslsh)) == 0) {
found = p;
break;
}
}
if (found == NULL) {
free(all);
return;
}
for (p = strtok(found, ","); p != NULL; p = strtok(NULL, ",")) {
lval = strtol(p, NULL, 10);
switch (index++) {
case 1: // chip count
if (lval < LKETC_MIN_CHIPS || lval > LKETC_MAX_CHIPS) {
applog(LOG_ERR, "Invalid chip count %ld for Lketc device %s",
lval, devid);
break;
}
*chips_count = (int)lval;
break;
case 2: // clock
if (lval < LKETC_CLK_MIN || lval > LKETC_CLK_MAX) {
applog(LOG_ERR, "Invalid clock speed %ld for Lketc device %s",
lval, devid);
break;
}
*chip_clk = (int)lval;
break;
default:
break;
}
}
free(all);
return;
}
static char *lketc_device_name(int chips_count)
{
struct name_chip_map *p;
for (p = lketc_models; p->model_name != NULL; ++p) {
if (p->chips_count == chips_count)
return p->model_name;
}
return NULL;
}
static int lketc_usb_control_transfer_data(struct cgpu_info *lketc, uint8_t request_type, uint8_t bRequest,
uint16_t wValue, uint16_t wIndex, uint32_t *data, int siz, enum usb_cmds cmd)
{
int err = usb_transfer_data(lketc, request_type, bRequest, wValue, wIndex, data, siz, cmd);
if (err)
applog(LOG_DEBUG, "%s%d: error %d on USB control transfer %s",
lketc->drv->name, lketc->cgminer_id, err, usb_cmdname(cmd));
return err;
}
static inline int lketc_usb_control_transfer(struct cgpu_info *lketc, uint8_t request_type, uint8_t bRequest,
uint16_t wValue, uint16_t wIndex, enum usb_cmds cmd)
{
return lketc_usb_control_transfer_data(lketc, request_type, bRequest, wValue, wIndex, NULL, 0, cmd);
}
static bool lketc_initialize_cp2102(struct cgpu_info *lketc)
{
int interface = usb_interface(lketc);
//uint32_t baudrate = CP210X_DATA_BAUD;
// Enable the UART
if (lketc_usb_control_transfer(lketc, CP210X_TYPE_OUT, CP210X_REQUEST_IFC_ENABLE,
CP210X_VALUE_UART_ENABLE, interface, C_ENABLE_UART))
return false;
// Set data control
if (lketc_usb_control_transfer(lketc, CP210X_TYPE_OUT, CP210X_REQUEST_DATA,
CP210X_VALUE_DATA, interface, C_SETDATA))
return false;
// Lketcminers have baud hardcoded to 115200, and reject baud commands, even to same value
// Set the baud
//if (lketc_usb_control_transfer_data(lketc, CP210X_TYPE_OUT, CP210X_REQUEST_BAUD,
// 0, interface, &baudrate, sizeof(baudrate), C_SETBAUD))
// return false;
return true;
}
static bool lketc_initialize_usb(struct cgpu_info *lketc)
{
struct LKETC_INFO *info = lketc->device_data;
enum sub_ident ident;
if (lketc->usbinfo.nodev)
return false;
ident = usb_ident(lketc);
switch (ident) {
case IDENT_LKE:
info->read_data_offset = 0;
return lketc_initialize_cp2102(lketc);
default:
applog(LOG_ERR, "lketc_initialize_usb called on wrong device, ident=%d", ident);
return false;
}
}
static struct cgpu_info *lketc_detect_one_usb(struct libusb_device *dev, struct usb_find_devices *found)
{
struct cgpu_info *lketc;
struct LKETC_INFO *info;
lketc = usb_alloc_cgpu(&lketc_drv, 1);
if (!usb_init(lketc, dev, found))
goto usbdealloc;
info = calloc(1, sizeof(struct LKETC_INFO));
if (unlikely(!info))
goto usbdealloc;
lketc->device_data = info;
lketc->deven = DEV_ENABLED;
lketc->threads = 1;
info->device_fd = -1;
info->using_libusb = 1;
if (lketc->usbdev->serial_string && strlen(lketc->usbdev->serial_string) > 4)
lketc->unique_id = lketc->usbdev->serial_string;
else
lketc->unique_id = lketc->device_path;
strncpy(info->device_name, lketc->unique_id, sizeof(info->device_name) - 1);
info->device_name[sizeof(info->device_name) - 1] = '\0';
lketc_get_device_options(lketc->unique_id, &info->chips_count, &info->chip_clk, opt_lketc_options);
lketc->name = lketc_device_name(info->chips_count);
info->freqcode = lketc_clk_to_freqcode(info->chip_clk);
info->baud = LKETC_IO_SPEED;
info->cores_per_chip = LKETC_CHIP_CORES;
info->chips_count_max = lowest_pow2(info->chips_count);
info->chips_bit_num = log_2(info->chips_count_max);
info->next_chip_clk = -1;
libusb_reset_device(lketc->usbdev->handle);
update_usb_stats(lketc);
lketc->usbdev->usb_type = USB_TYPE_STD;
if (!lketc_initialize_usb(lketc)) {
applog(LOG_ERR, "Failed to initialize Lketc USB-UART interface");
goto alldealloc;
}
info->golden_speed_per_core = (((info->chip_clk * 2.) / 3.) * 1024.) / 8.;
info->work_timeout.tv_sec = 4294967296LL / (info->golden_speed_per_core * info->cores_per_chip * info->chips_count_max) * 0.9;
info->work_timeout.tv_usec = 0;
info->read_count = (uint32_t)((4294967296LL*10)/(info->cores_per_chip*info->chips_count_max*info->golden_speed_per_core*2));
info->read_count = info->read_count*3/4;
if (!add_cgpu(lketc))
goto alldealloc;
return lketc;
alldealloc:
usb_uninit(lketc);
free(lketc->device_data);
lketc->device_data = NULL;
usbdealloc:
lketc = usb_free_cgpu(lketc);
return NULL;
}
static bool lketc_detect_one_serial(const char *devpath)
{
struct timeval tv_start, tv_finish;
int i, fd, baud, cores_per_chip, chips_count_max, chips_count, chip_clk;
//int this_option_offset = ++option_offset;
unsigned char freqcode_init, freqcode;
uint32_t nonce;
uint64_t golden_speed_per_core;
/* this check here is needed as a failsafe because the serial_detect
* functions do not keep track of devices already opened */
for (i = 0; i < total_devices; ++i) {
if (devices[i]->device_path && !strcasecmp(devices[i]->device_path, devpath))
return false;
}
uint32_t golden_nonce_val = be32toh(0x268d0300); // 0xd26 = 3366
unsigned char ob_bin[LKETC_COMMAND_PKT_LEN], nonce_bin[LKETC_EVENT_PKT_LEN];
static const char golden_ob[] =
"55aa0001"
"00038000063b0b1b028f32535e900609c15dc49a42b1d8492a6dd4f8f15295c989a1decf584a6aa93be26066d3185f55ef635b5865a7a79b7fa74121a6bb819da416328a9bd2f8cef72794bf02000000";
static const char golden_ob2[] =
"55aa00ff"
"c00278894532091be6f16a5381ad33619dacb9e6a4a6e79956aac97b51112bfb93dc450b8fc765181a344b6244d42d78625f5c39463bbfdc10405ff711dc1222dd065b015ac9c2c66e28da7202000000";
lketc_get_device_options(devpath, &chips_count, &chip_clk, opt_lketc_options);
baud = LKETC_IO_SPEED; // baud rate is fixed
cores_per_chip = LKETC_CHIP_CORES; // cores/chip also fixed
chips_count_max = lowest_pow2(chips_count);
//if (chips_count > opt_lketc_chips_count_max)
// opt_lketc_chips_count_max = lowest_pow2(chips_count);
//chips_count_max = opt_lketc_chips_count_max;
if (initial_startup_phase)
applog(LOG_INFO, "Lketc Detect: Attempting to open %s", devpath);
fd = lketc_serial_open_detect(devpath, baud, true);
if (unlikely(fd == -1)) {
if (initial_startup_phase)
applog(LOG_ERR, "Lketc Detect: Failed to open %s", devpath);
return false;
}
freqcode = lketc_clk_to_freqcode(chip_clk);
// from 150M step to the high or low speed. we need to add delay and resend to init chip
if (chip_clk > 150)
freqcode_init = lketc_clk_to_freqcode(165);
else
freqcode_init = lketc_clk_to_freqcode(139);
flush_uart(fd);
hex2bin(ob_bin, golden_ob2, sizeof(ob_bin));
ob_bin[0] = freqcode_init;
ob_bin[1] = ~freqcode_init;
ob_bin[2] = 0x00;
ob_bin[3] = 0x01;
for (i = 0; i < 2; ++i) {
lketc_serial_write(fd, ob_bin, sizeof(ob_bin));
cgsleep_ms(500); // what is the minimum the miners need/will accept?
flush_uart(fd);
}
hex2bin(ob_bin, golden_ob2, sizeof(ob_bin));
ob_bin[0] = freqcode;
ob_bin[1] = ~freqcode;
ob_bin[2] = 0x00;
ob_bin[3] = 0x01;
for (i = 0; i < 2; ++i) {
lketc_serial_write(fd, ob_bin, sizeof(ob_bin));
cgsleep_ms(500);
flush_uart(fd);
}
if (!opt_lketc_nocheck_golden) {
memset(nonce_bin, 0, sizeof(nonce_bin));
hex2bin(ob_bin, golden_ob, sizeof(ob_bin));
ob_bin[0] = freqcode;
ob_bin[1] = ~freqcode;
ob_bin[2] = 0x00;
ob_bin[3] = 0x01;
for (i = 0; i < 2; ++i) {
lketc_serial_write(fd, ob_bin, sizeof(ob_bin));
cgtime(&tv_start);
if (lketc_serial_read(fd, nonce_bin, sizeof(nonce_bin), 25, &tv_finish) == sizeof(nonce_bin))
break;
}
lketc_serial_close(fd);
memcpy(&nonce, nonce_bin, sizeof(nonce_bin));
nonce = be32toh(nonce);
if (nonce != golden_nonce_val) {
applog(LOG_ERR, "Lketc Detect: "
"Test failed at %s: got %08x, should be: %08x",
devpath, nonce, golden_nonce_val);
return false;
}
golden_speed_per_core = (uint64_t)((double)0xd26 / tdiff(&tv_finish, &tv_start));
if (opt_lketc_debug)
applog(LOG_INFO, "Test succeeded at %s: got %08x",
devpath, nonce);
} else {
lketc_serial_close(fd);
golden_speed_per_core = (((chip_clk * 2.) / 3.) * 1024.) / 8.;
}
/* We have a real Lketc miner! */
struct cgpu_info *lketc;
struct LKETC_INFO *info;
lketc = calloc(1, sizeof(struct cgpu_info));
if (unlikely(!lketc))
quit(1, "Failed to malloc struct cgpu_info");
info = calloc(1, sizeof(struct LKETC_INFO));
if (unlikely(!info))
quit(1, "Failed to malloc struct LKETC_INFO");
lketc->drv = &lketc_drv;
lketc->name = lketc_device_name(chips_count);
lketc->device_path = strdup(devpath);
lketc->device_data = info;
lketc->deven = DEV_ENABLED;
lketc->threads = 1;
applog(LOG_NOTICE, "Found Lketc at %s, mark as %d",
devpath, lketc->device_id);
applog(LOG_INFO, "Lketc: Init: %d baud=%d cores_per_chip=%d chips_count=%d",
lketc->device_id, baud, cores_per_chip, chips_count);
info->device_fd = -1;
info->using_libusb = 0;
lketc->unique_id = MAX( strrchr(lketc->device_path, '/'),
strrchr(lketc->device_path, '\\'));
if (lketc->unique_id == NULL)
lketc->unique_id = lketc->device_path;
else
++lketc->unique_id;
strncpy(info->device_name, lketc->unique_id, sizeof(info->device_name) - 1);
info->device_name[sizeof(info->device_name) - 1] = '\0';
info->work_timeout.tv_sec = 4294967296LL / (golden_speed_per_core * cores_per_chip * chips_count_max) * 0.9;
info->work_timeout.tv_usec = 0;
info->golden_speed_per_core = golden_speed_per_core;
info->read_count = (uint32_t)((4294967296LL*10)/(cores_per_chip*chips_count_max*golden_speed_per_core*2));
info->read_count = info->read_count*3/4;
info->next_chip_clk = -1;
info->freqcode = freqcode;
info->baud = baud;
info->cores_per_chip = cores_per_chip;
info->chips_count = chips_count;
info->chips_count_max = chips_count_max;
if ((chips_count_max & (chips_count_max - 1)) != 0)
quit(1, "chips_count_max must be a power of 2");
info->chip_clk = chip_clk;
info->chips_bit_num = log_2(chips_count_max);
info->read_data_offset = 0;
if (!add_cgpu(lketc))
quit(1, "Failed to add_cgpu");
return true;
}
/************************************************************
* Host <-> ASIC protocol implementation
************************************************************/
static void lketc_purge_work(struct cgpu_info *lketc)
{
struct LKETC_INFO *info = lketc->device_data;
mutex_lock(&info->lock);
if (info->current_work != NULL) {
free_work(info->current_work);
info->current_work = NULL;
}
notify_send_work_thread(lketc);
mutex_unlock(&info->lock);
}
#define nonce_range_start(cperc, cmax, core, chip) \
(((0xffffffff / cperc + 1) * core) + ((0x1fffffff / cmax + 1) * chip))
static bool lketc_read_response(struct cgpu_info *lketc)
{
struct LKETC_INFO *info = lketc->device_data;
unsigned char evtpkt[LKETC_READ_BUFFER];
uint32_t nonce, chip, core;
int ret, err;
double duration_s;
bool valid;
if (using_libusb(info)) {
//err = usb_read_timeout(lketc, (char *)evtpkt, sizeof(evtpkt), &ret, 250, C_GETRESULTS);
err = usb_read_once(lketc, (char *)evtpkt, sizeof(evtpkt), &ret, C_GETRESULTS);
#if LKETC_PROTOCOL_DEBUG
if (opt_lketc_debug) {
char *hexstr;
hexstr = bin2hex(evtpkt, ret);
applog(LOG_DEBUG, "< %s err=%d ret=%d", hexstr, err, ret);
free(hexstr);
}
#endif
if (err != LIBUSB_SUCCESS && err != LIBUSB_ERROR_TIMEOUT) {
applog(LOG_ERR, "%s%d: USB read error: %s",
lketc->drv->name, lketc->device_id, libusb_error_name(err));
return false;
}
if (ret < LKETC_EVENT_PKT_LEN + info->read_data_offset)
return true;
} else {
ret = lketc_serial_read(info->device_fd, evtpkt, LKETC_EVENT_PKT_LEN, 1, NULL);
if (ret < 0) { // error
info->serial_reopen = true;
notify_send_work_thread(lketc);
return false;
} else if (ret == 0) { // timeout
return true;
}
flush_uart(info->device_fd);
}
cgtime(&info->workend);
memcpy(&nonce, evtpkt + info->read_data_offset, LKETC_EVENT_PKT_LEN);
nonce = be32toh(nonce);
mutex_lock(&info->lock);
if (info->current_work == NULL) { // work was flushed before we read response
applog(LOG_DEBUG, "%s%d: Received nonce for flushed work",
lketc->drv->name, lketc->device_id);
mutex_unlock(&info->lock);
return true;
}
valid = submit_nonce(info->thr, info->current_work, nonce);
++info->workdone;
core = (nonce & 0xe0000000) >> 29; // core indicated by 3 highest bits
chip = (nonce & 0x1ff80000) >> (29 - info->chips_bit_num);
duration_s = tdiff(&info->workend, &info->workstart);
if (chip < LKETC_MAX_CHIPS && core < LKETC_CHIP_CORES) {
++info->nonce_count[chip][core];
if (!valid)
++info->error_count[chip][core];
if (valid && duration_s > 0) {
info->hashes_per_s = (nonce - nonce_range_start(info->cores_per_chip, info->chips_count_max, core, chip)) / duration_s * info->cores_per_chip * info->chips_count;
info->last_nonce = nonce;
}
} else {
applog(LOG_INFO, "%s%d: Corrupt nonce message received, cannot determine chip and core",
lketc->drv->name, lketc->device_id);
}
mutex_unlock(&info->lock);
return true;
}
static bool lketc_check_need_work(struct cgpu_info *lketc)
{
struct LKETC_INFO *info = lketc->device_data;
struct thr_info *thr = info->thr;
struct work *work;
bool need_work;
need_work = (info->current_work == NULL);
if (need_work) {
work = get_work(thr, thr->id); // get_work can block, so done outside mutex_lock
mutex_lock(&info->lock);
if (info->current_work == NULL) { // verify still NULL
work->devflag = false;
info->current_work = work;
} else {
need_work = false;
}
mutex_unlock(&info->lock);
if (!need_work)
discard_work(work);
}
return need_work;
}
static bool lketc_send_work(struct cgpu_info *lketc, struct work *work)
{
struct LKETC_INFO *info = lketc->device_data;
unsigned char cmdpkt[LKETC_COMMAND_PKT_LEN];
uint32_t diff_code, diff;
int ret;
diff = work->work_difficulty;
if (diff < 1)
diff = 1;
diff_code = 0xffff / diff;
applog(LOG_DEBUG, "lketc_send_work: diff=%d diff_code=%04x", diff, diff_code);
cmdpkt[0] = info->freqcode;
cmdpkt[1] = ~(info->freqcode);
cmdpkt[2] = (diff_code & 0xff00) >> 8;
cmdpkt[3] = (diff_code & 0x00ff);
memcpy(cmdpkt + 4, work->data, 80);
rev(cmdpkt + 4, 80);
if (using_libusb(info)) { // in libusb mode we send via usb ;)
#if LKETC_PROTOCOL_DEBUG
if (opt_lketc_debug) {
char *hexstr;
hexstr = bin2hex(cmdpkt, sizeof(cmdpkt));
applog(LOG_DEBUG, "> %s", hexstr);
free(hexstr);
}
#endif
if (usb_write(lketc, (char *)cmdpkt, sizeof(cmdpkt), &ret, C_SENDWORK) != LIBUSB_SUCCESS ||
ret != sizeof(cmdpkt))
return false;
} else { // otherwise direct via serial port
ret = lketc_serial_write(info->device_fd, cmdpkt, sizeof(cmdpkt));
if (ret < 0) {
info->serial_reopen = true;
notify_send_work_thread(lketc);
return false;
}
}
return true;
}
static void *lketc_send_work_thread(void *data)
{
struct cgpu_info *lketc = (struct cgpu_info *)data;
struct LKETC_INFO *info = lketc->device_data;
char threadname[24];
struct timeval tv_now, tv_spent, tv_rem;
int retval;
snprintf(threadname, sizeof(threadname), "Lketc/%d", lketc->device_id);
RenameThread(threadname);
applog(LOG_INFO, "%s%d: serial I/O thread running, %s",
lketc->drv->name, lketc->device_id, threadname);
while (likely(!lketc->shutdown)) {
if (unlikely(info->thr->pause || lketc->deven != DEV_ENABLED)) {
cgsem_wait(&info->wusem);
lketc_purge_work(lketc);
continue;
}
if (unlikely(using_libusb(info) && lketc->usbinfo.nodev))
break;
if (unlikely(info->serial_reopen)) {
if (using_serial(info) && !lketc_reopen(lketc)) {
applog(LOG_ERR, "Failed to reopen %s%d on %s, shutting down",
lketc->drv->name, lketc->device_id, lketc->device_path);
break;
}
info->serial_reopen = false;
lketc_purge_work(lketc);
}
lketc_check_need_work(lketc);
mutex_lock(&info->lock);
if (info->current_work && !info->current_work->devflag) {
/* send task to device */
if (opt_lketc_debug)
applog(LOG_INFO, "Sending work");
if (lketc_send_work(lketc, info->current_work)) {
info->current_work->devflag = true;
cgtime(&info->workstart);
if (info->next_chip_clk != -1) {
info->chip_clk = info->next_chip_clk;
info->next_chip_clk = -1;
}
} else {
applog(LOG_NOTICE, "%s%d: I/O error while sending work, will retry",
lketc->drv->name, lketc->device_id);
mutex_unlock(&info->lock);
continue;
}
}
mutex_unlock(&info->lock);
cgtime(&tv_now);
timersub(&tv_now, &info->workstart, &tv_spent);
timersub(&info->work_timeout, &tv_spent, &tv_rem);
if (opt_lketc_debug) {
applog(LOG_DEBUG, "Workstart: %d.%06d", (int)info->workstart.tv_sec, (int)info->workstart.tv_usec);
applog(LOG_DEBUG, "Spent: %d.%06d", (int)tv_spent.tv_sec, (int)tv_spent.tv_usec);
applog(LOG_DEBUG, "Remaining: %d.%06d", (int)tv_rem.tv_sec, (int)tv_rem.tv_usec);
}
retval = cgsem_mswait(&info->wusem, (tv_rem.tv_sec < 1) ? 5000 : tv_rem.tv_sec * 1000);
if (retval == ETIMEDOUT)
lketc_purge_work(lketc); // abandon current work
}
lketc->shutdown = true;
return NULL;
}
/************************************************************
* CGMiner Interface functions
************************************************************/
static int lketc_autoscan()
{
int found = 0;
applog(LOG_DEBUG, "lketc_autoscan() called");
found += serial_autodetect_udev(lketc_detect_one_serial, LKETC_USB_ID_MODEL_STR1);
return found;
}
static void lketc_detect(bool __maybe_unused hotplug)
{
static int serial_usb = 0;
if (initial_startup_phase && hotplug)
initial_startup_phase = false;
if (serial_usb == 0)
serial_usb = (list_empty(&scan_devices)) ? -1 : 1;
if (serial_usb < 0)
usb_detect(&lketc_drv, lketc_detect_one_usb);
else
serial_detect_iauto(&lketc_drv, lketc_detect_one_serial, lketc_autoscan);
}
static bool lketc_prepare(struct thr_info *thr)
{
struct cgpu_info *lketc = thr->cgpu;
struct LKETC_INFO *info = lketc->device_data;
applog(LOG_NOTICE, "%s%d opened on %s",
lketc->drv->name, lketc->device_id, lketc->device_path);
info->serial_reopen = (using_serial(info)) ? true : false;
info->thr = thr;
mutex_init(&info->lock);
cgsem_init(&info->wusem);
// Use qualitative value until first result is returned
info->hashes_per_s = info->golden_speed_per_core * info->cores_per_chip * info->chips_count;
return true;
}
static bool lketc_thread_init(struct thr_info *thr)
{
struct cgpu_info *lketc = thr->cgpu;
struct LKETC_INFO *info = lketc->device_data;
if (pthread_create(&info->sworkpth, NULL, lketc_send_work_thread, lketc)) {
applog(LOG_ERR, "%s%d: Failed to create I/O thread",
lketc->drv->name, lketc->device_id);
return false;
}
return true;
}
static int64_t lketc_scanwork(struct thr_info *thr)
{
struct cgpu_info *lketc = thr->cgpu;
struct LKETC_INFO *info = lketc->device_data;
struct timeval old_scanwork_time;
double elapsed_s;
int64_t estimate_hashes;
if (unlikely(using_libusb(info) && lketc->usbinfo.nodev))
return -1;
if (unlikely(using_serial(info) && info->serial_reopen)) {
cgsleep_ms(500);
return 0;
}
if (unlikely(!lketc_read_response(lketc))) // reads either from serial or libusb or times out
return 0;
if (thr->work_restart || thr->work_update) {
lketc_purge_work(lketc);
thr->work_restart = false;