/**
* ztex.c - cgminer worker for Ztex 1.15x fpga board
*
* Copyright (c) 2012 nelisky.btc@gmail.com
*
* This work is based upon the Java SDK provided by ztex which is
* Copyright (C) 2009-2011 ZTEX GmbH.
* http://www.ztex.de
*
* This work is based upon the icarus.c worker which is
* Copyright 2012 Luke Dashjr
* Copyright 2012 Xiangfu <xiangfu@openmobilefree.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see http://www.gnu.org/licenses/.
**/
#include <unistd.h>
#include <sha2.h>
#include "miner.h"
#include "libztex.h"
#define GOLDEN_BACKLOG 5
struct device_api ztex_api;
static void ztex_detect()
{
int cnt;
int i;
struct libztex_dev_list **ztex_devices;
cnt = libztex_scanDevices(&ztex_devices);
applog(LOG_WARNING, "Found %d ztex board(s)", cnt);
for (i=0; i<cnt; i++) {
if (total_devices == MAX_DEVICES)
break;
struct cgpu_info *ztex;
ztex = calloc(1, sizeof(struct cgpu_info));
ztex->api = &ztex_api;
ztex->device_id = total_devices;
ztex->device = ztex_devices[i]->dev;
ztex->threads = 1;
devices[total_devices++] = ztex;
applog(LOG_WARNING,"%s: Found Ztex, mark as %d", ztex->device->repr, ztex->device_id);
}
if (cnt > 0) {
libztex_freeDevList(ztex_devices);
}
}
static bool ztex_updateFreq (struct libztex_device* ztex)
{
int i, maxM, bestM;
double bestR, r;
for (i=0; i<ztex->freqMaxM; i++) {
if (ztex->maxErrorRate[i+1]*i < ztex->maxErrorRate[i]*(i+20))
ztex->maxErrorRate[i+1] = ztex->maxErrorRate[i]*(1.0+20.0/i);
}
maxM = 0;
while (maxM<ztex->freqMDefault && ztex->maxErrorRate[maxM+1]<LIBZTEX_MAXMAXERRORRATE)
maxM++;
while (maxM<ztex->freqMaxM && ztex->errorWeight[maxM]>150 && ztex->maxErrorRate[maxM+1]<LIBZTEX_MAXMAXERRORRATE)
maxM++;
bestM = 0;
bestR = 0;
for (i=0; i<=maxM; i++) {
r = (i + 1 + ( i == ztex->freqM ? LIBZTEX_ERRORHYSTERESIS : 0))*(1-ztex->maxErrorRate[i]);
if (r > bestR) {
bestM = i;
bestR = r;
}
}
if (bestM != ztex->freqM) {
libztex_setFreq(ztex, bestM);
}
maxM = ztex->freqMDefault;
while (maxM<ztex->freqMaxM && ztex->errorWeight[maxM+1] > 100)
maxM++;
if ((bestM < (1.0-LIBZTEX_OVERHEATTHRESHOLD) * maxM) && bestM < maxM - 1) {
libztex_resetFpga(ztex);
applog(LOG_ERR, "%s: frequency drop of %.1f%% detect. This may be caused by overheating. FPGA is shut down to prevent damage.", ztex->repr, (1.0-1.0*bestM/maxM)*100);
return false;
}
return true;
}
static bool ztex_checkNonce (struct libztex_device *ztex,
struct work *work,
struct libztex_hash_data *hdata)
{
uint32_t *data32 = (uint32_t *)(work->data);
unsigned char swap[128];
uint32_t *swap32 = (uint32_t *)swap;
unsigned char hash1[32];
unsigned char hash2[32];
uint32_t *hash2_32 = (uint32_t *)hash2;
int i;
work->data[64 + 12 + 0] = (hdata->nonce >> 0) & 0xff;
work->data[64 + 12 + 1] = (hdata->nonce >> 8) & 0xff;
work->data[64 + 12 + 2] = (hdata->nonce >> 16) & 0xff;
work->data[64 + 12 + 3] = (hdata->nonce >> 24) & 0xff;
for (i = 0; i < 80 / 4; i++)
swap32[i] = swab32(data32[i]);
sha2(swap, 80, hash1, false);
sha2(hash1, 32, hash2, false);
if (swab32(hash2_32[7]) != ((hdata->hash7 + 0x5be0cd19) & 0xFFFFFFFF)) {
ztex->errorCount[ztex->freqM] += 1.0/ztex->numNonces;
applog(LOG_DEBUG, "%s: checkNonce failed for %0.8X", ztex->repr, hdata->nonce);
return false;
}
return true;
}
static uint64_t ztex_scanhash(struct thr_info *thr, struct work *work,
__maybe_unused uint64_t max_nonce)
{
struct libztex_device *ztex;
unsigned char sendbuf[44];
int i, j;
uint32_t backlog[GOLDEN_BACKLOG];
int backlog_p = 0;
uint32_t lastnonce[GOLDEN_BACKLOG], nonce, noncecnt = 0;
bool overflow, found, rv;
struct libztex_hash_data hdata[GOLDEN_BACKLOG];
ztex = thr->cgpu->device;
memcpy(sendbuf, work->data + 64, 12);
memcpy(sendbuf+12, work->midstate, 32);
memset(backlog, 0, sizeof(backlog));
libztex_sendHashData(ztex, sendbuf);
applog(LOG_DEBUG, "sent hashdata");
for (i=0; i<ztex->numNonces; i++) {
lastnonce[i] = 0;
}
overflow = false;
while (!(overflow || work_restart[thr->id].restart)) {
usleep(250000);
if (work_restart[thr->id].restart) {
break;
}
libztex_readHashData(ztex, &hdata[0]);
if (work_restart[thr->id].restart) {
break;
}
ztex->errorCount[ztex->freqM] *= 0.995;
ztex->errorWeight[ztex->freqM] = ztex->errorWeight[ztex->freqM] * 0.995 + 1.0;
for (i=0; i<ztex->numNonces; i++) {
nonce = hdata[i].nonce;
if (nonce > noncecnt)
noncecnt = nonce;
if ((nonce >> 4) < (lastnonce[i] >> 4)) {
overflow = true;
} else {
lastnonce[i] = nonce;
}
if (!ztex_checkNonce(ztex, work, &hdata[i])) {
thr->cgpu->hw_errors++;
continue;
}
nonce = hdata[i].goldenNonce;
if (nonce > 0) {
found = false;
for (j=0; j<GOLDEN_BACKLOG; j++) {
if (backlog[j] == nonce) {
found = true;
break;
}
}
if (!found) {
// new nonce found!
backlog[backlog_p++] = nonce;
if (backlog_p >= GOLDEN_BACKLOG) {
backlog_p = 0;
}
#ifdef __BIG_ENDIAN__
nonce = swab32(nonce);
#endif
work->blk.nonce = 0xffffffff;
rv = submit_nonce(thr, work, nonce);
applog(LOG_DEBUG, "submitted %0.8X %d", nonce, rv);
}
}
}
}
ztex->errorRate[ztex->freqM] = ztex->errorCount[ztex->freqM] / ztex->errorWeight[ztex->freqM] * (ztex->errorWeight[ztex->freqM]<100 ? ztex->errorWeight[ztex->freqM]*0.01 : 1.0);
if (ztex->errorRate[ztex->freqM] > ztex->maxErrorRate[ztex->freqM]) {
ztex->maxErrorRate[ztex->freqM] = ztex->errorRate[ztex->freqM];
}
if (!ztex_updateFreq(ztex)) {
// Something really serious happened, so mark this thread as dead!
thr->cgpu->status = LIFE_DEAD;
}
applog(LOG_DEBUG, "exit %1.8X", noncecnt);
work->blk.nonce = 0xffffffff;
return noncecnt;
}
static bool ztex_prepare(struct thr_info *thr)
{
struct timeval now;
struct cgpu_info *ztex = thr->cgpu;
gettimeofday(&now, NULL);
get_datestamp(ztex->init, &now);
if (libztex_configureFpga(ztex->device) != 0) {
return false;
}
ztex->device->freqM = -1;
ztex_updateFreq(ztex->device);
return true;
}
static void ztex_shutdown(struct thr_info *thr)
{
if (thr->cgpu) {
libztex_destroy_device(thr->cgpu->device);
thr->cgpu = NULL;
}
}
struct device_api ztex_api = {
.name = "ZTX",
.api_detect = ztex_detect,
.thread_prepare = ztex_prepare,
.scanhash = ztex_scanhash,
.thread_shutdown = ztex_shutdown,
};
