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[80];
uint32_t *swap32 = (uint32_t *)swap;
unsigned char hash1[32];
unsigned char hash2[32];
uint32_t *hash2_32 = (uint32_t *)hash2;
int i;
#if defined(__BIGENDIAN__) || defined(MIPSEB)
hdata->nonce = swab32(hdata->nonce);
hdata->hash7 = swab32(hdata->hash7);
#endif
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 defined(__BIGENDIAN__) || defined(MIPSEB)
if (hash2_32[7] != ((hdata->hash7 + 0x5be0cd19) & 0xFFFFFFFF)) {
#else
if (swab32(hash2_32[7]) != ((hdata->hash7 + 0x5be0cd19) & 0xFFFFFFFF)) {
#endif
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 int64_t ztex_scanhash(struct thr_info *thr, struct work *work,
__maybe_unused int64_t max_nonce)
{
struct libztex_device *ztex;
unsigned char sendbuf[44];
int i, j, k;
uint32_t *backlog;
int backlog_p = 0, backlog_max;
uint32_t *lastnonce;
uint32_t nonce, noncecnt = 0;
bool overflow, found;
struct libztex_hash_data hdata[GOLDEN_BACKLOG];
if (thr->cgpu->deven == DEV_DISABLED)
return -1;
ztex = thr->cgpu->device_ztex;
memcpy(sendbuf, work->data + 64, 12);
memcpy(sendbuf + 12, work->midstate, 32);
ztex_selectFpga(ztex);
i = libztex_sendHashData(ztex, sendbuf);
if (i < 0) {
// Something wrong happened in send
applog(LOG_ERR, "%s: Failed to send hash data with err %d, retrying", ztex->repr, i);
nmsleep(500);
i = libztex_sendHashData(ztex, sendbuf);
if (i < 0) {
// And there's nothing we can do about it
ztex_disable(thr);
applog(LOG_ERR, "%s: Failed to send hash data with err %d, giving up", ztex->repr, i);
ztex_releaseFpga(ztex);
return -1;
}
}
ztex_releaseFpga(ztex);
applog(LOG_DEBUG, "%s: sent hashdata", ztex->repr);
lastnonce = calloc(1, sizeof(uint32_t)*ztex->numNonces);
if (lastnonce == NULL) {
applog(LOG_ERR, "%s: failed to allocate lastnonce[%d]", ztex->repr, ztex->numNonces);
return -1;
}
/* Add an extra slot for detecting dupes that lie around */
backlog_max = ztex->numNonces * (2 + ztex->extraSolutions);
backlog = calloc(1, sizeof(uint32_t) * backlog_max);
if (backlog == NULL) {
applog(LOG_ERR, "%s: failed to allocate backlog[%d]", ztex->repr, backlog_max);
return -1;
}
overflow = false;
applog(LOG_DEBUG, "%s: entering poll loop", ztex->repr);
while (!(overflow || thr->work_restart)) {
nmsleep(250);
if (thr->work_restart) {
applog(LOG_DEBUG, "%s: New work detected", ztex->repr);
break;
}
ztex_selectFpga(ztex);
i = libztex_readHashData(ztex, &hdata[0]);
if (i < 0) {
// Something wrong happened in read
applog(LOG_ERR, "%s: Failed to read hash data with err %d, retrying", ztex->repr, i);
nmsleep(500);
i = libztex_readHashData(ztex, &hdata[0]);
if (i < 0) {
// And there's nothing we can do about it
ztex_disable(thr);
applog(LOG_ERR, "%s: Failed to read hash data with err %d, giving up", ztex->repr, i);
free(lastnonce);
free(backlog);
ztex_releaseFpga(ztex);
return -1;
}
}
ztex_releaseFpga(ztex);
if (thr->work_restart) {
applog(LOG_DEBUG, "%s: New work detected", ztex->repr);
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 defined(__BIGENDIAN__) || defined(MIPSEB)
nonce = swab32(nonce);
#endif
if (nonce > noncecnt)
noncecnt = nonce;
if (((0xffffffff - nonce) < (nonce - lastnonce[i])) || nonce < lastnonce[i]) {
applog(LOG_DEBUG, "%s: overflow nonce=%0.8x lastnonce=%0.8x", ztex->repr, nonce, lastnonce[i]);
overflow = true;
} else
lastnonce[i] = nonce;
#if !(defined(__BIGENDIAN__) || defined(MIPSEB))
nonce = swab32(nonce);
#endif
if (!ztex_checkNonce(ztex, work, &hdata[i])) {
thr->cgpu->hw_errors++;
continue;
}
for (j=0; j<=ztex->extraSolutions; j++) {
nonce = hdata[i].goldenNonce[j];
if (nonce > 0) {
found = false;
for (k = 0; k < backlog_max; k++) {
if (backlog[k] == nonce) {
found = true;
break;
}
}
if (!found) {
applog(LOG_DEBUG, "%s: Share found N%dE%d", ztex->repr, i, j);
backlog[backlog_p++] = nonce;
if (backlog_p >= backlog_max)
backlog_p = 0;
#if defined(__BIGENDIAN__) || defined(MIPSEB)
nonce = swab32(nonce);
#endif
work->blk.nonce = 0xffffffff;
submit_nonce(thr, work, nonce);
applog(LOG_DEBUG, "%s: submitted %0.8x", ztex->repr, nonce);
}
}
}
}
}
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!
free(lastnonce);
free(backlog);
return -1;
}
applog(LOG_DEBUG, "%s: exit %1.8X", ztex->repr, noncecnt);
work->blk.nonce = 0xffffffff;
free(lastnonce);
free(backlog);
return noncecnt;
}
static void ztex_statline_before(char *buf, struct cgpu_info *cgpu)
{
if (cgpu->deven == DEV_ENABLED) {
tailsprintf(buf, "%s-%d | ", cgpu->device_ztex->snString, cgpu->device_ztex->fpgaNum+1);
tailsprintf(buf, "%0.1fMHz | ", cgpu->device_ztex->freqM1 * (cgpu->device_ztex->freqM + 1));
}
}
static bool ztex_prepare(struct thr_info *thr)
{
struct timeval now;
struct cgpu_info *cgpu = thr->cgpu;
struct libztex_device *ztex = cgpu->device_ztex;
gettimeofday(&now, NULL);
get_datestamp(cgpu->init, &now);
ztex_selectFpga(ztex);
if (libztex_configureFpga(ztex) != 0) {
libztex_resetFpga(ztex);
ztex_releaseFpga(ztex);
applog(LOG_ERR, "%s: Disabling!", thr->cgpu->device_ztex->repr);
thr->cgpu->deven = DEV_DISABLED;
return true;
}
ztex->freqM = ztex->freqMaxM+1;;
//ztex_updateFreq(ztex);
libztex_setFreq(ztex, ztex->freqMDefault);
ztex_releaseFpga(ztex);
applog(LOG_DEBUG, "%s: prepare", ztex->repr);
return true;
}
static void ztex_shutdown(struct thr_info *thr)
{
if (thr->cgpu->device_ztex != NULL) {
if (thr->cgpu->device_ztex->fpgaNum == 0)
pthread_mutex_destroy(&thr->cgpu->device_ztex->mutex);
applog(LOG_DEBUG, "%s: shutdown", thr->cgpu->device_ztex->repr);
libztex_destroy_device(thr->cgpu->device_ztex);
thr->cgpu->device_ztex = NULL;
}
}
static void ztex_disable(struct thr_info *thr)
{
applog(LOG_ERR, "%s: Disabling!", thr->cgpu->device_ztex->repr);
devices[thr->cgpu->device_id]->deven = DEV_DISABLED;
ztex_shutdown(thr);
}
static int64_t ztex_scanhash(struct thr_info *thr, struct work *work,
__maybe_unused int64_t max_nonce)
{
struct cgpu_info *cgpu = thr->cgpu;
struct libztex_device *ztex;
unsigned char sendbuf[44];
int i, j, k;
uint32_t *backlog;
int backlog_p = 0, backlog_max;
uint32_t *lastnonce;
uint32_t nonce, noncecnt = 0;
bool overflow, found;
struct libztex_hash_data hdata[GOLDEN_BACKLOG];
if (thr->cgpu->deven == DEV_DISABLED)
return -1;
ztex = thr->cgpu->device_ztex;
memcpy(sendbuf, work->data + 64, 12);
memcpy(sendbuf + 12, work->midstate, 32);
ztex_selectFpga(ztex, cgpu->proc_id);
i = libztex_sendHashData(ztex, sendbuf);
if (i < 0) {
// Something wrong happened in send
applog(LOG_ERR, "%"PRIpreprv": Failed to send hash data with err %d, retrying", cgpu->proc_repr, i);
cgsleep_ms(500);
i = libztex_sendHashData(ztex, sendbuf);
if (i < 0) {
// And there's nothing we can do about it
ztex_disable(thr);
applog(LOG_ERR, "%"PRIpreprv": Failed to send hash data with err %d, giving up", cgpu->proc_repr, i);
ztex_releaseFpga(ztex);
return -1;
}
}
ztex_releaseFpga(ztex);
applog(LOG_DEBUG, "%"PRIpreprv": sent hashdata", cgpu->proc_repr);
lastnonce = calloc(1, sizeof(uint32_t)*ztex->numNonces);
if (lastnonce == NULL) {
applog(LOG_ERR, "%"PRIpreprv": failed to allocate lastnonce[%d]", cgpu->proc_repr, ztex->numNonces);
return -1;
}
/* Add an extra slot for detecting dupes that lie around */
backlog_max = ztex->numNonces * (2 + ztex->extraSolutions);
backlog = calloc(1, sizeof(uint32_t) * backlog_max);
if (backlog == NULL) {
applog(LOG_ERR, "%"PRIpreprv": failed to allocate backlog[%d]", cgpu->proc_repr, backlog_max);
free(lastnonce);
return -1;
}
overflow = false;
int count = 0;
applog(LOG_DEBUG, "%"PRIpreprv": entering poll loop", cgpu->proc_repr);
while (!(overflow || thr->work_restart)) {
count++;
if (!restart_wait(thr, 250))
{
applog(LOG_DEBUG, "%"PRIpreprv": New work detected", cgpu->proc_repr);
break;
}
ztex_selectFpga(ztex, cgpu->proc_id);
i = libztex_readHashData(ztex, &hdata[0]);
if (i < 0) {
// Something wrong happened in read
applog(LOG_ERR, "%"PRIpreprv": Failed to read hash data with err %d, retrying", cgpu->proc_repr, i);
cgsleep_ms(500);
i = libztex_readHashData(ztex, &hdata[0]);
if (i < 0) {
// And there's nothing we can do about it
ztex_disable(thr);
applog(LOG_ERR, "%"PRIpreprv": Failed to read hash data with err %d, giving up", cgpu->proc_repr, i);
free(lastnonce);
free(backlog);
ztex_releaseFpga(ztex);
return -1;
}
}
ztex_releaseFpga(ztex);
if (thr->work_restart) {
applog(LOG_DEBUG, "%"PRIpreprv": New work detected", cgpu->proc_repr);
break;
}
dclk_gotNonces(&ztex->dclk);
for (i = 0; i < ztex->numNonces; i++) {
nonce = hdata[i].nonce;
if (nonce > noncecnt)
noncecnt = nonce;
if (((0xffffffff - nonce) < (nonce - lastnonce[i])) || nonce < lastnonce[i]) {
applog(LOG_DEBUG, "%"PRIpreprv": overflow nonce=%08x lastnonce=%08x", cgpu->proc_repr, nonce, lastnonce[i]);
overflow = true;
} else
lastnonce[i] = nonce;
if (!ztex_checkNonce(cgpu, work, &hdata[i])) {
// do not count errors in the first 500ms after sendHashData (2x250 wait time)
if (count > 2)
dclk_errorCount(&ztex->dclk, 1.0 / ztex->numNonces);
inc_hw_errors_only(thr);
}
for (j=0; j<=ztex->extraSolutions; j++) {
nonce = hdata[i].goldenNonce[j];
if (nonce == ztex->offsNonces) {
continue;
}
found = false;
for (k = 0; k < backlog_max; k++) {
if (backlog[k] == nonce) {
found = true;
break;
}
}
if (!found) {
backlog[backlog_p++] = nonce;
if (backlog_p >= backlog_max)
backlog_p = 0;
work->blk.nonce = 0xffffffff;
if (!j || test_nonce(work, nonce, false))
submit_nonce(thr, work, nonce);
applog(LOG_DEBUG, "%"PRIpreprv": submitted %08x (from N%dE%d)", cgpu->proc_repr, nonce, i, j);
}
}
}
}
dclk_preUpdate(&ztex->dclk);
if (!ztex_updateFreq(thr)) {
// Something really serious happened, so mark this thread as dead!
free(lastnonce);
free(backlog);
return -1;
}
applog(LOG_DEBUG, "%"PRIpreprv": exit %1.8X", cgpu->proc_repr, noncecnt);
work->blk.nonce = 0xffffffff;
free(lastnonce);
free(backlog);
return noncecnt;
}
static int64_t ztex_scanhash(struct thr_info *thr, struct work *work,
__maybe_unused int64_t max_nonce)
{
struct libztex_device *ztex;
unsigned char sendbuf[44];
int i, j, k;
uint32_t *backlog;
int backlog_p = 0, backlog_max;
uint32_t *lastnonce;
uint32_t nonce, noncecnt = 0;
bool overflow, found;
struct libztex_hash_data hdata[GOLDEN_BACKLOG];
if (thr->cgpu->deven == DEV_DISABLED)
return -1;
ztex = thr->cgpu->device_ztex;
memcpy(sendbuf, work->data + 64, 12);
memcpy(sendbuf + 12, work->midstate, 32);
ztex_selectFpga(ztex);
i = libztex_sendHashData(ztex, sendbuf);
if (i < 0) {
// Something wrong happened in send
applog(LOG_ERR, "%s: Failed to send hash data with err %d, retrying", ztex->repr, i);
nmsleep(500);
i = libztex_sendHashData(ztex, sendbuf);
if (i < 0) {
// And there's nothing we can do about it
ztex_disable(thr);
applog(LOG_ERR, "%s: Failed to send hash data with err %d, giving up", ztex->repr, i);
ztex_releaseFpga(ztex);
return -1;
}
}
ztex_releaseFpga(ztex);
applog(LOG_DEBUG, "%s: sent hashdata", ztex->repr);
lastnonce = calloc(1, sizeof(uint32_t)*ztex->numNonces);
if (lastnonce == NULL) {
applog(LOG_ERR, "%s: failed to allocate lastnonce[%d]", ztex->repr, ztex->numNonces);
return -1;
}
/* Add an extra slot for detecting dupes that lie around */
backlog_max = ztex->numNonces * (2 + ztex->extraSolutions);
backlog = calloc(1, sizeof(uint32_t) * backlog_max);
if (backlog == NULL) {
applog(LOG_ERR, "%s: failed to allocate backlog[%d]", ztex->repr, backlog_max);
return -1;
}
overflow = false;
int count = 0;
int validNonces = 0;
double errorCount = 0;
applog(LOG_DEBUG, "%s: entering poll loop", ztex->repr);
while (!(overflow || thr->work_restart)) {
count++;
int sleepcount = 0;
while (thr->work_restart == 0 && sleepcount < 25) {
nmsleep(10);
sleepcount += 1;
}
if (thr->work_restart) {
applog(LOG_DEBUG, "%s: New work detected", ztex->repr);
break;
}
ztex_selectFpga(ztex);
i = libztex_readHashData(ztex, &hdata[0]);
if (i < 0) {
// Something wrong happened in read
applog(LOG_ERR, "%s: Failed to read hash data with err %d, retrying", ztex->repr, i);
nmsleep(500);
i = libztex_readHashData(ztex, &hdata[0]);
if (i < 0) {
// And there's nothing we can do about it
ztex_disable(thr);
applog(LOG_ERR, "%s: Failed to read hash data with err %d, giving up", ztex->repr, i);
free(lastnonce);
free(backlog);
ztex_releaseFpga(ztex);
return -1;
}
}
ztex_releaseFpga(ztex);
if (thr->work_restart) {
applog(LOG_DEBUG, "%s: New work detected", ztex->repr);
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 (((0xffffffff - nonce) < (nonce - lastnonce[i])) || nonce < lastnonce[i]) {
applog(LOG_DEBUG, "%s: overflow nonce=%0.8x lastnonce=%0.8x", ztex->repr, nonce, lastnonce[i]);
overflow = true;
} else
lastnonce[i] = nonce;
if (ztex_checkNonce(work, nonce) != (hdata->hash7 + 0x5be0cd19)) {
applog(LOG_DEBUG, "%s: checkNonce failed for %0.8X", ztex->repr, nonce);
// do not count errors in the first 500ms after sendHashData (2x250 wait time)
if (count > 2) {
thr->cgpu->hw_errors++;
errorCount += (1.0 / ztex->numNonces);
}
}
else
validNonces++;
for (j=0; j<=ztex->extraSolutions; j++) {
nonce = hdata[i].goldenNonce[j];
if (nonce == ztex->offsNonces) {
continue;
}
// precheck the extraSolutions since they often fail
if (j > 0 && ztex_checkNonce(work, nonce) != 0) {
continue;
}
found = false;
for (k = 0; k < backlog_max; k++) {
if (backlog[k] == nonce) {
found = true;
break;
}
}
if (!found) {
applog(LOG_DEBUG, "%s: Share found N%dE%d", ztex->repr, i, j);
backlog[backlog_p++] = nonce;
if (backlog_p >= backlog_max)
backlog_p = 0;
work->blk.nonce = 0xffffffff;
submit_nonce(thr, work, nonce);
applog(LOG_DEBUG, "%s: submitted %0.8x", ztex->repr, nonce);
}
}
}
}
// only add the errorCount if we had at least some valid nonces or
// had no valid nonces in the last round
if (errorCount > 0.0) {
if (ztex->nonceCheckValid > 0 && validNonces == 0) {
applog(LOG_ERR, "%s: resetting %.1f errors", ztex->repr, errorCount);
}
else {
ztex->errorCount[ztex->freqM] += errorCount;
}
}
// remember the number of valid nonces for the check in the next round
ztex->nonceCheckValid = validNonces;
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!
free(lastnonce);
free(backlog);
return -1;
}
applog(LOG_DEBUG, "%s: exit %1.8X", ztex->repr, noncecnt);
work->blk.nonce = 0xffffffff;
free(lastnonce);
free(backlog);
return noncecnt;
}
static int64_t ztex_scanhash(struct thr_info *thr, struct work *work,
__maybe_unused int64_t max_nonce)
{
// int numbytes = 80; // KRAMBLE 80 byte protocol
int numbytes = 76; // KRAMBLE 76 byte protocol
struct libztex_device *ztex;
unsigned char sendbuf[80]; // KRAMBLE
int i, j, k;
uint32_t *backlog;
int backlog_p = 0, backlog_max;
uint32_t *lastnonce;
uint32_t nonce, noncecnt = 0;
bool overflow, found;
struct libztex_hash_data hdata[GOLDEN_BACKLOG];
if (thr->cgpu->deven == DEV_DISABLED)
return -1;
ztex = thr->cgpu->device_ztex;
// memcpy(sendbuf, work->data + 64, 12);
// memcpy(sendbuf + 12, work->midstate, 32);
memcpy(sendbuf, work->data, numbytes); // KRAMBLE
ztex_selectFpga(ztex);
i = libztex_sendHashData(ztex, sendbuf, numbytes);
if (i < 0) {
// Something wrong happened in send
applog(LOG_ERR, "%s: Failed to send hash data with err %d, retrying", ztex->repr, i);
nmsleep(500);
i = libztex_sendHashData(ztex, sendbuf, numbytes);
if (i < 0) {
// And there's nothing we can do about it
ztex_disable(thr);
applog(LOG_ERR, "%s: Failed to send hash data with err %d, giving up", ztex->repr, i);
ztex_releaseFpga(ztex);
return -1;
}
}
ztex_releaseFpga(ztex);
#if 0 // KRAMBLE
char *data = bin2hex(work->data, sizeof(work->data));
applog(LOG_INFO, "%s: sent data %s", ztex->repr, data);
#endif
lastnonce = calloc(1, sizeof(uint32_t)*ztex->numNonces);
if (lastnonce == NULL) {
applog(LOG_ERR, "%s: failed to allocate lastnonce[%d]", ztex->repr, ztex->numNonces);
return -1;
}
/* Add an extra slot for detecting dupes that lie around */
backlog_max = ztex->numNonces * (2 + ztex->extraSolutions);
backlog = calloc(1, sizeof(uint32_t) * backlog_max);
if (backlog == NULL) {
applog(LOG_ERR, "%s: failed to allocate backlog[%d]", ztex->repr, backlog_max);
return -1;
}
overflow = false;
int count = 0;
int validNonces = 0;
double errorCount = 0;
applog(LOG_DEBUG, "%s: entering poll loop", ztex->repr);
while (!(overflow || thr->work_restart)) {
count++;
int sleepcount = 0;
while (thr->work_restart == 0 && sleepcount < 25) {
nmsleep(10);
sleepcount += 1;
}
if (thr->work_restart) {
applog(LOG_DEBUG, "%s: New work detected", ztex->repr);
break;
}
ztex_selectFpga(ztex);
i = libztex_readHashData(ztex, &hdata[0]);
if (i < 0) {
// Something wrong happened in read
applog(LOG_ERR, "%s: Failed to read hash data with err %d, retrying", ztex->repr, i);
nmsleep(500);
i = libztex_readHashData(ztex, &hdata[0]);
if (i < 0) {
// And there's nothing we can do about it
ztex_disable(thr);
applog(LOG_ERR, "%s: Failed to read hash data with err %d, giving up", ztex->repr, i);
free(lastnonce);
free(backlog);
ztex_releaseFpga(ztex);
return -1;
}
}
ztex_releaseFpga(ztex);
if (thr->work_restart) {
applog(LOG_DEBUG, "%s: New work detected", ztex->repr);
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) by smartbitcoin
// fix the verilog bug which send INT_MAX as nonce sometime.
// NB: cgminer , nonce counter was int64, but ztex driver was int32.
if( nonce > noncecnt && nonce < 1<<28 )
noncecnt = nonce;
// KRAMBLE don't overflow if nonce == 0 (eg if fpga is not hashing)
if ( (((0xffffffff - nonce) < (nonce - lastnonce[i])) || nonce < lastnonce[i]) && nonce ) {
applog(LOG_INFO, "%s: overflow nonce=%08x lastnonce=%08x", ztex->repr, nonce, lastnonce[i]); // KRAMBLE not in production ??
// applog(LOG_DEBUG, "%s: overflow nonce=%08x lastnonce=%08x", ztex->repr, nonce, lastnonce[i]);
// overflow = true; // KRAMBLE disabled as it should not happen at litecoin hash rates (except when broken
// so leave warning message enabled)
} else
lastnonce[i] = nonce;
// KRAMBLE try forcing overflow every so often to see if this fixes DIFF & SICK problems
// if (nonce > 0x00040000) // Overflow every 256k nonces (a few times a minute, depending on hash rate)
if (nonce > 0x00100000) // Overflow every 1M nonces (single core needs larger range to avoid duplicates)
{
// applog(LOG_INFO, "%s: force overflow nonce=%08x lastnonce=%08x", ztex->repr, nonce, lastnonce[i]); // KRAMBLE not in production
overflow = true;
}
if (ztex_checkNonce(work, nonce) != (hdata->hash7)) {
applog(LOG_INFO, "%s: checkNonce failed for %08X hash7 %08X", ztex->repr, nonce, hdata->hash7); // KRAMBLE not in production ??
// applog(LOG_DEBUG, "%s: checkNonce failed for %08X", ztex->repr, nonce);
// do not count errors in the first 500ms after sendHashData (2x250 wait time)
if (count > 2) {
thr->cgpu->hw_errors++;
errorCount += (1.0 / ztex->numNonces);
}
}
else
validNonces++;
for (j=0; j<=ztex->extraSolutions; j++) {
nonce = hdata[i].goldenNonce[j];
if (nonce == ztex->offsNonces) {
continue;
}
// precheck the extraSolutions since they often fail
if (j > 0 && ztex_checkNonce(work, nonce) != 0) {
continue;
}
found = false;
for (k = 0; k < backlog_max; k++) {
if (backlog[k] == nonce) {
found = true;
break;
}
}
if (!found) {
applog(LOG_INFO, "%s: Share found %08x", ztex->repr, nonce); // KRAMBLE useful to show its working
// applog(LOG_DEBUG, "%s: Share found N%dE%d", ztex->repr, i, j);
backlog[backlog_p++] = nonce;
if (backlog_p >= backlog_max)
backlog_p = 0;
work->blk.nonce = 0xffffffff;
submit_nonce(thr, work, nonce);
applog(LOG_DEBUG, "%s: submitted %08x", ztex->repr, nonce);
}
}
}
}
// only add the errorCount if we had at least some valid nonces or
// had no valid nonces in the last round
if (errorCount > 0.0) {
if (ztex->nonceCheckValid > 0 && validNonces == 0) {
applog(LOG_ERR, "%s: resetting %.1f errors", ztex->repr, errorCount);
}
else {
ztex->errorCount[ztex->freqM] += errorCount;
}
}
// remember the number of valid nonces for the check in the next round
ztex->nonceCheckValid = validNonces;
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];
// KRAMBLE Disable ztex_updateFreq if lockClock flag set (ie --ztex-clock set initial and max freq to the same value)
if (!ztex->lockClock) {
if (!ztex_updateFreq(ztex)) {
// Something really serious happened, so mark this thread as dead!
free(lastnonce);
free(backlog);
return -1;
}
}
applog(LOG_DEBUG, "%s: exit %1.8X", ztex->repr, noncecnt);
work->blk.nonce = 0xffffffff;
free(lastnonce);
free(backlog);
return noncecnt;
}