thodg/cgminer/driver-ztex.c

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• Hash : 88751974
  Author :
  Date : 2013-09-28T10:25:48
  

  Create a macro list of drivers to enable easier addition of further drivers.

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• driver-ztex.c

• /**
   *   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 was
   *   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 "miner.h"
  #include <unistd.h>
  #include <sha2.h>
  #include "libztex.h"
  #include "util.h"
  
  #define GOLDEN_BACKLOG 5
  
  struct device_drv ztex_drv;
  
  // Forward declarations
  static void ztex_disable(struct thr_info* thr);
  static bool ztex_prepare(struct thr_info *thr);
  
  static void ztex_selectFpga(struct libztex_device* ztex)
  {
  	if (ztex->root->numberOfFpgas > 1) {
  		if (ztex->root->selectedFpga != ztex->fpgaNum)
  			mutex_lock(&ztex->root->mutex);
  		libztex_selectFpga(ztex);
  	}
  }
  
  static void ztex_releaseFpga(struct libztex_device* ztex)
  {
  	if (ztex->root->numberOfFpgas > 1) {
  		ztex->root->selectedFpga = -1;
  		mutex_unlock(&ztex->root->mutex);
  	}
  }
  
  static void ztex_detect(void)
  {
  	int cnt;
  	int i,j;
  	int fpgacount;
  	struct libztex_dev_list **ztex_devices;
  	struct libztex_device *ztex_slave;
  	struct cgpu_info *ztex;
  
  	cnt = libztex_scanDevices(&ztex_devices);
  	if (cnt > 0)
  		applog(LOG_WARNING, "Found %d ztex board%s", cnt, cnt > 1 ? "s" : "");
  
  	for (i = 0; i < cnt; i++) {
  		ztex = calloc(1, sizeof(struct cgpu_info));
  		ztex->drv = &ztex_drv;
  		ztex->device_ztex = ztex_devices[i]->dev;
  		ztex->threads = 1;
  		ztex->device_ztex->fpgaNum = 0;
  		ztex->device_ztex->root = ztex->device_ztex;
  		add_cgpu(ztex);
  
  		fpgacount = libztex_numberOfFpgas(ztex->device_ztex);
  
  		if (fpgacount > 1)
  			pthread_mutex_init(&ztex->device_ztex->mutex, NULL);
  
  		for (j = 1; j < fpgacount; j++) {
  			ztex = calloc(1, sizeof(struct cgpu_info));
  			ztex->drv = &ztex_drv;
  			ztex_slave = calloc(1, sizeof(struct libztex_device));
  			memcpy(ztex_slave, ztex_devices[i]->dev, sizeof(struct libztex_device));
  			ztex->device_ztex = ztex_slave;
  			ztex->threads = 1;
  			ztex_slave->fpgaNum = j;
  			ztex_slave->root = ztex_devices[i]->dev;
  			ztex_slave->repr[strlen(ztex_slave->repr) - 1] = ('1' + j);
  			add_cgpu(ztex);
  		}
  
  		applog(LOG_WARNING,"%s: Found Ztex (fpga count = %d) , mark as %d", ztex->device_ztex->repr, fpgacount, 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) {
  		ztex_selectFpga(ztex);
  		libztex_setFreq(ztex, bestM);
  		ztex_releaseFpga(ztex);
  	}
  
  	maxM = ztex->freqMDefault;
  	while (maxM < ztex->freqMaxM && ztex->errorWeight[maxM + 1] > 100)
  		maxM++;
  	if ((bestM < (1.0 - LIBZTEX_OVERHEATTHRESHOLD) * maxM) && bestM < maxM - 1) {
  		ztex_selectFpga(ztex);
  		libztex_resetFpga(ztex);
  		ztex_releaseFpga(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 uint32_t ztex_checkNonce(struct work *work, uint32_t nonce)
  {
  	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;
  
  	swap32[76/4] = htonl(nonce);
  
  	for (i = 0; i < 76 / 4; i++)
  		swap32[i] = swab32(data32[i]);
  
  	sha256(swap, 80, hash1);
  	sha256(hash1, 32, hash2);
  
  	return htonl(hash2_32[7]);
  }
  
  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);
  		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, "%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) {
  			cgsleep_ms(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);
  			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, "%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=%08x lastnonce=%08x", 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 %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_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];
  
  	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, size_t bufsiz, struct cgpu_info *cgpu)
  {
  	if (cgpu->deven == DEV_ENABLED) {
  		tailsprintf(buf, bufsiz, "%s-%d | ", cgpu->device_ztex->snString, cgpu->device_ztex->fpgaNum+1);
  		tailsprintf(buf, bufsiz, "%0.1fMHz | ", cgpu->device_ztex->freqM1 * (cgpu->device_ztex->freqM + 1));
  	}
  }
  
  static bool ztex_prepare(struct thr_info *thr)
  {
  	struct cgpu_info *cgpu = thr->cgpu;
  	struct libztex_device *ztex = cgpu->device_ztex;
  
  	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)
  {
  	struct cgpu_info *cgpu;
  
  	applog(LOG_ERR, "%s: Disabling!", thr->cgpu->device_ztex->repr);
  	cgpu = get_devices(thr->cgpu->device_id);
  	cgpu->deven = DEV_DISABLED;
  	ztex_shutdown(thr);
  }
  
  struct device_drv ztex_drv = {
  	.drv_id = DRIVER_ztex,
  	.dname = "ztex",
  	.name = "ZTX",
  	.drv_detect = ztex_detect,
  	.get_statline_before = ztex_statline_before,
  	.thread_prepare = ztex_prepare,
  	.scanhash = ztex_scanhash,
  	.thread_shutdown = ztex_shutdown,
  };
  
  

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