thodg/cgminer/ztex.c

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• Hash : 0902f21a
  Author :
  Date : 2012-03-11T16:58:50
  

  add license headers and some cleanup

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• 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 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 "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_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;
    }
    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)) {
      libztex_readHashData(ztex, &hdata[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;
        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);
          }
        }
      }
  
    }
  
    applog(LOG_DEBUG, "exit %0.8X", noncecnt);
    return noncecnt;
  }
  
  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,
  };
  
  

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