/**
* 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, ztex_hotplug_api;
// Forward declarations
static void ztex_disable(struct thr_info* thr);
static bool ztex_prepare(struct thr_info *thr);
static void ztex_detect(void)
{
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_ztex = ztex_devices[i]->dev;
ztex->threads = 1;
add_cgpu(ztex);
applog(LOG_WARNING,"%s: Found Ztex, mark as %d", ztex->device_ztex->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;
#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 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_ztex;
memcpy(sendbuf, work->data + 64, 12);
memcpy(sendbuf + 12, work->midstate, 32);
memset(backlog, 0, sizeof(backlog));
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);
usleep(500000);
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);
return 0;
}
}
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) {
applog(LOG_DEBUG, "%s: New work detected", ztex->repr);
break;
}
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);
usleep(500000);
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);
return 0;
}
}
if (work_restart[thr->id].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 (((nonce & 0x7fffffff) >> 4) < ((lastnonce[i] & 0x7fffffff) >> 4)) {
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;
}
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) {
applog(LOG_DEBUG, "%s: Share found", ztex->repr);
backlog[backlog_p++] = nonce;
if (backlog_p >= GOLDEN_BACKLOG)
backlog_p = 0;
#if defined(__BIGENDIAN__) || defined(MIPSEB)
nonce = swab32(nonce);
#endif
work->blk.nonce = 0xffffffff;
rv = submit_nonce(thr, work, nonce);
applog(LOG_DEBUG, "%s: submitted %0.8x %d", ztex->repr, 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!
return 0;
applog(LOG_DEBUG, "%s: exit %1.8X", ztex->repr, noncecnt);
work->blk.nonce = 0xffffffff;
return noncecnt > 0? noncecnt: 1;
}
static void ztex_statline_before(char *buf, struct cgpu_info *cgpu)
{
if (cgpu->deven == DEV_ENABLED) {
tailsprintf(buf, "%s | ", cgpu->device_ztex->snString);
tailsprintf(buf, "%0.2fMhz | ", cgpu->device_ztex->freqM1 * (cgpu->device_ztex->freqM + 1));
}
}
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_ztex) != 0)
return false;
ztex->device_ztex->freqM = -1;
ztex_updateFreq(ztex->device_ztex);
applog(LOG_DEBUG, "%s: prepare", ztex->device_ztex->repr);
return true;
}
static void ztex_shutdown(struct thr_info *thr)
{
if (thr->cgpu->device_ztex != NULL) {
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);
}
struct device_api ztex_api = {
.dname = "ztex",
.name = "PGA",
.api_detect = ztex_detect,
.get_statline_before = ztex_statline_before,
.thread_prepare = ztex_prepare,
.scanhash = ztex_scanhash,
.thread_shutdown = ztex_shutdown,
};
