thodg/cgminer/libbitfury.c

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• Hash : 425d2ce5
  Author :
  Date : 2014-01-06T09:52:30
  

  spi_txrx should always send and receive the same size message

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• libbitfury.c

• /*
   * Copyright 2014 Con Kolivas
   * Copyright 2013 Andrew Smith
   * Copyright 2013 bitfury
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License as published by the Free
   * Software Foundation; either version 3 of the License, or (at your option)
   * any later version.  See COPYING for more details.
   */
  
  #include "miner.h"
  #include "libbitfury.h"
  #include "sha2.h"
  
  #define BITFURY_REFRESH_DELAY 100
  
  void ms3steps(uint32_t *p)
  {
  	uint32_t a, b, c, d, e, f, g, h, new_e, new_a;
  	int i;
  
  	a = p[0];
  	b = p[1];
  	c = p[2];
  	d = p[3];
  	e = p[4];
  	f = p[5];
  	g = p[6];
  	h = p[7];
  	for (i = 0; i < 3; i++) {
  		new_e = p[i+16] + sha256_k[i] + h + CH(e,f,g) + SHA256_F2(e) + d;
  		new_a = p[i+16] + sha256_k[i] + h + CH(e,f,g) + SHA256_F2(e) +
  			SHA256_F1(a) + MAJ(a,b,c);
  		d = c;
  		c = b;
  		b = a;
  		a = new_a;
  		h = g;
  		g = f;
  		f = e;
  		e = new_e;
  	}
  	p[15] = a;
  	p[14] = b;
  	p[13] = c;
  	p[12] = d;
  	p[11] = e;
  	p[10] = f;
  	p[9] = g;
  	p[8] = h;
  }
  
  uint32_t decnonce(uint32_t in)
  {
  	uint32_t out;
  
  	/* First part load */
  	out = (in & 0xFF) << 24;
  	in >>= 8;
  
  	/* Byte reversal */
  	in = (((in & 0xaaaaaaaa) >> 1) | ((in & 0x55555555) << 1));
  	in = (((in & 0xcccccccc) >> 2) | ((in & 0x33333333) << 2));
  	in = (((in & 0xf0f0f0f0) >> 4) | ((in & 0x0f0f0f0f) << 4));
  
  	out |= (in >> 2) & 0x3FFFFF;
  
  	/* Extraction */
  	if (in & 1)
  		out |= (1 << 23);
  	if (in & 2)
  		out |= (1 << 22);
  
  	out -= 0x800004;
  	return out;
  }
  
  /* Test vectors to calculate (using address-translated loads) */
  static unsigned int atrvec[] = {
  	0xb0e72d8e, 0x1dc5b862, 0xe9e7c4a6, 0x3050f1f5, 0x8a1a6b7e, 0x7ec384e8, 0x42c1c3fc, 0x8ed158a1, /* MIDSTATE */
  	0,0,0,0,0,0,0,0,
  	0x8a0bb7b7, 0x33af304f, 0x0b290c1a, 0xf0c4e61f, /* WDATA: hashMerleRoot[7], nTime, nBits, nNonce */
  
  	0x9c4dfdc0, 0xf055c9e1, 0xe60f079d, 0xeeada6da, 0xd459883d, 0xd8049a9d, 0xd49f9a96, 0x15972fed, /* MIDSTATE */
  	0,0,0,0,0,0,0,0,
  	0x048b2528, 0x7acb2d4f, 0x0b290c1a, 0xbe00084a, /* WDATA: hashMerleRoot[7], nTime, nBits, nNonce */
  
  	0x0317b3ea, 0x1d227d06, 0x3cca281e, 0xa6d0b9da, 0x1a359fe2, 0xa7287e27, 0x8b79c296, 0xc4d88274, /* MIDSTATE */
  	0,0,0,0,0,0,0,0,
  	0x328bcd4f, 0x75462d4f, 0x0b290c1a, 0x002c6dbc, /* WDATA: hashMerleRoot[7], nTime, nBits, nNonce */
  
  	0xac4e38b6, 0xba0e3b3b, 0x649ad6f8, 0xf72e4c02, 0x93be06fb, 0x366d1126, 0xf4aae554, 0x4ff19c5b, /* MIDSTATE */
  	0,0,0,0,0,0,0,0,
  	0x72698140, 0x3bd62b4f, 0x3fd40c1a, 0x801e43e9, /* WDATA: hashMerleRoot[7], nTime, nBits, nNonce */
  
  	0x9dbf91c9, 0x12e5066c, 0xf4184b87, 0x8060bc4d, 0x18f9c115, 0xf589d551, 0x0f7f18ae, 0x885aca59, /* MIDSTATE */
  	0,0,0,0,0,0,0,0,
  	0x6f3806c3, 0x41f82a4f, 0x3fd40c1a, 0x00334b39, /* WDATA: hashMerleRoot[7], nTime, nBits, nNonce */
  };
  
  static int rehash(unsigned char *midstate, unsigned m7, unsigned ntime, unsigned nbits,
  		  unsigned nnonce)
  {
  	unsigned char in[16];
  	unsigned int *in32 = (unsigned int *)in;
  	char *hex;
  	unsigned int *mid32 = (unsigned int *)midstate;
  	unsigned out32[8];
  	unsigned char *out = (unsigned char *) out32;
  	sha256_ctx ctx;
  
  	memset( &ctx, 0, sizeof( sha256_ctx ) );
  	memcpy(ctx.h, mid32, 8*4);
  	ctx.tot_len = 64;
  
  	nnonce = bswap_32(nnonce);
  	in32[0] = bswap_32(m7);
  	in32[1] = bswap_32(ntime);
  	in32[2] = bswap_32(nbits);
  	in32[3] = nnonce;
  
  	sha256_update(&ctx, in, 16);
  	sha256_final(&ctx, out);
  	sha256(out, 32, out);
  
  	if (out32[7] == 0) {
  		hex = bin2hex(midstate, 32);
  		hex = bin2hex(out, 32);
  		applog(LOG_INFO, "! MS0: %08x, m7: %08x, ntime: %08x, nbits: %08x, nnonce: %08x\n\t\t\t out: %s\n", mid32[0], m7, ntime, nbits, nnonce, hex);
  		return 1;
  	}
  	return 0;
  }
  
  void bitfury_work_to_payload(struct bitfury_payload *p, struct work *w)
  {
  	unsigned char flipped_data[80];
  
  	memset(p, 0, sizeof(struct bitfury_payload));
  	flip80(flipped_data, w->data);
  
  	memcpy(p->midstate, w->midstate, 32);
  	p->m7 = bswap_32(*(unsigned *)(flipped_data + 64));
  	p->ntime = bswap_32(*(unsigned *)(flipped_data + 68));
  	p->nbits = bswap_32(*(unsigned *)(flipped_data + 72));
  	applog(LOG_INFO, "INFO nonc: %08x bitfury_scanHash MS0: %08x, ", p->nnonce, ((unsigned int *)w->midstate)[0]);
  	applog(LOG_INFO, "INFO merkle[7]: %08x, ntime: %08x, nbits: %08x", p->m7, p->ntime, p->nbits);
  }
  
  void spi_clear_buf(struct bitfury_info *info)
  {
  	info->spibufsz = 0;
  }
  
  void spi_add_buf(struct bitfury_info *info, const void *buf, const int sz)
  {
  	if (unlikely(info->spibufsz + sz > NF1_SPIBUF_SIZE)) {
  		applog(LOG_WARNING, "SPI bufsize overflow!");
  		return;
  	}
  	memcpy(&info->spibuf[info->spibufsz], buf, sz);
  	info->spibufsz += sz;
  }
  
  void spi_add_break(struct bitfury_info *info)
  {
  	spi_add_buf(info, "\x4", 1);
  }
  
  static void spi_add_buf_reverse(struct bitfury_info *info, const char *buf, const int sz)
  {
  	int i;
  
  	for (i = 0; i < sz; i++) { // Reverse bit order in each byte!
  		unsigned char p = buf[i];
  
  		p = ((p & 0xaa) >> 1) | ((p & 0x55) << 1);
  		p = ((p & 0xcc) >> 2) | ((p & 0x33) << 2);
  		p = ((p & 0xf0) >> 4) | ((p & 0x0f) << 4);
  		info->spibuf[info->spibufsz + i] = p;
  	}
  	info->spibufsz += sz;
  }
  
  void spi_add_data(struct bitfury_info *info, uint16_t addr, const void *buf, int len)
  {
  	unsigned char otmp[3];
  
  	if (len < 4 || len > 128) {
  		applog(LOG_WARNING, "Can't add SPI data size %d", len);
  		return;
  	}
  	len /= 4; /* Strip */
  	otmp[0] = (len - 1) | 0xE0;
  	otmp[1] = addr >> 8;
  	otmp[2] = addr & 0xFF;
  	spi_add_buf(info, otmp, 3);
  	len *= 4;
  	spi_add_buf_reverse(info, buf, len);
  }
  
  // Bit-banging reset... Each 3 reset cycles reset first chip in chain
  bool spi_reset(struct cgpu_info *bitfury, struct bitfury_info *info)
  {
  	struct mcp_settings *mcp = &info->mcp;
  	int r;
  
  	// SCK_OVRRIDE
  	mcp->value.pin[NF1_PIN_SCK_OVR] = MCP2210_GPIO_PIN_HIGH;
  	mcp->direction.pin[NF1_PIN_SCK_OVR] = MCP2210_GPIO_OUTPUT;
  	mcp->designation.pin[NF1_PIN_SCK_OVR] = MCP2210_PIN_GPIO;
  	if (!mcp2210_set_gpio_settings(bitfury, mcp))
  		return false;
  
  	for (r = 0; r < 16; ++r) {
  		char buf[1] = {0x81}; // will send this waveform: - _ _ _ _ _ _ -
  		unsigned int length = 1;
  
  		if (!mcp2210_spi_transfer(bitfury, buf, &length))
  			return false;
  	}
  
  	// Deactivate override
  	mcp->direction.pin[NF1_PIN_SCK_OVR] = MCP2210_GPIO_INPUT;
  	if (!mcp2210_set_gpio_settings(bitfury, mcp))
  		return false;
  
  	return true;
  }
  
  bool spi_txrx(struct cgpu_info *bitfury, struct bitfury_info *info)
  {
  	unsigned int length, sendrcv;
  	int offset = 0;
  
  	if (!spi_reset(bitfury, info))
  		return false;
  	length = info->spibufsz;
  	applog(LOG_DEBUG, "%s %d: SPI sending %u bytes total", bitfury->drv->name,
  	       bitfury->device_id, length);
  	while (length > MCP2210_TRANSFER_MAX) {
  		sendrcv = MCP2210_TRANSFER_MAX;
  		if (!mcp2210_spi_transfer(bitfury, info->spibuf + offset, &sendrcv))
  			return false;
  		if (sendrcv != MCP2210_TRANSFER_MAX) {
  			applog(LOG_DEBUG, "%s %d: Send/Receive size mismatch sent %d received %d",
  			       bitfury->drv->name, bitfury->device_id, MCP2210_TRANSFER_MAX, sendrcv);
  		}
  		length -= MCP2210_TRANSFER_MAX;
  		offset += MCP2210_TRANSFER_MAX;
  	}
  	sendrcv = length;
  	if (!mcp2210_spi_transfer(bitfury, info->spibuf + offset, &sendrcv))
  		return false;
  	if (sendrcv != length) {
  		applog(LOG_WARNING, "%s %d: Send/Receive size mismatch sent %d received %d",
  		       bitfury->drv->name, bitfury->device_id, length, sendrcv);
  		return false;
  	}
  	return true;
  }
  
  void libbitfury_sendHashData(struct cgpu_info *bf)
  {
  	struct bitfury_info *info = bf->device_data;
  	static unsigned second_run;
  	unsigned *newbuf = info->newbuf;
  	unsigned *oldbuf = info->oldbuf;
  	struct bitfury_payload *p = &(info->payload);
  	struct bitfury_payload *op = &(info->opayload);
  
  	/* Programming next value */
  	memcpy(atrvec, p, 20 * 4);
  	ms3steps(atrvec);
  
  	spi_clear_buf(info);
  	spi_add_break(info);
  	spi_add_data(info, 0x3000, (void*)&atrvec[0], 19 * 4);
  	spi_txrx(bf, info);
  
  	memcpy(newbuf, info->spibuf + 4, 17 * 4);
  
  	info->job_switched = newbuf[16] != oldbuf[16];
  
  	if (second_run && info->job_switched) {
  		int i;
  		int results_num = 0;
  		unsigned int *results = info->results;
  
  		for (i = 0; i < 16; i++) {
  			if (oldbuf[i] != newbuf[i]) {
  				unsigned pn; //possible nonce
  				unsigned int s = 0; //TODO zero may be solution
  
  				pn = decnonce(newbuf[i]);
  				s |= rehash(op->midstate, op->m7, op->ntime, op->nbits, pn) ? pn : 0;
  				s |= rehash(op->midstate, op->m7, op->ntime, op->nbits, pn-0x400000) ? pn - 0x400000 : 0;
  				s |= rehash(op->midstate, op->m7, op->ntime, op->nbits, pn-0x800000) ? pn - 0x800000 : 0;
  				s |= rehash(op->midstate, op->m7, op->ntime, op->nbits, pn+0x2800000)? pn + 0x2800000 : 0;
  				s |= rehash(op->midstate, op->m7, op->ntime, op->nbits, pn+0x2C00000)? pn + 0x2C00000 : 0;
  				s |= rehash(op->midstate, op->m7, op->ntime, op->nbits, pn+0x400000) ? pn + 0x400000 : 0;
  				if (s)
  					results[results_num++] = bswap_32(s);
  			}
  		}
  		info->results_n = results_num;
  
  		memcpy(op, p, sizeof(struct bitfury_payload));
  		memcpy(oldbuf, newbuf, 17 * 4);
  	}
  
  	cgsleep_ms(BITFURY_REFRESH_DELAY);
  	second_run = 1;
  }
  

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