static void search_for_extra_nonce(struct thr_info *thr, struct work *work,
                                   struct hf_candidate_nonce *n)
{
    uint32_t nonce = n->nonce;
    int i;

    /* No function to test with ntime offsets yet */
    if (n->ntime & HF_NTIME_MASK)
        return;
    for (i = 0; i < 128; i++, nonce++) {
        /* We could break out of this early if nonce wraps or if we
         * find one correct nonce since the chance of more is extremely
         * low but this function will be hit so infrequently we may as
         * well test the entire range with the least code. */
        if (test_nonce(work, nonce))
            submit_tested_work(thr, work);
    }
}
Exemple #2
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static void gridseed_test_btc_nonce(struct cgpu_info *gridseed, GRIDSEED_INFO *info,
		struct thr_info *thr, unsigned char *data)
{
	struct work *work;
	uint32_t nonce;
	int workid, index, i;
	bool valid = false;
	bool nowork = false;

	memcpy(&workid, data+8, 4);
	memcpy(&nonce, data+4, 4);
	nonce = htole32(nonce);

	mutex_lock(&info->qlock);
	nowork = (info->soft_queue_len <= 0);
	for(i=0; i<info->soft_queue_len; i++) {
		struct work *dupwork;
		work = info->workqueue[i];
		if (work->devflag == false)
			continue;
		if (work->id > workid)
			break;
		dupwork = copy_work(work);
		if (dupwork == NULL)
			continue;
		if (test_nonce(dupwork, nonce)) {
			submit_tested_work(thr, dupwork);
			index = i;
			valid = true;
			free_work(dupwork);
			break;
		} else
			free_work(dupwork);
	}
	if (valid)
		__gridseed_purge_work_queue(gridseed, info, index);
	mutex_unlock(&info->qlock);

	if (!valid && !nowork)
		inc_hw_errors(thr);
	return;
}
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;
}