thodg/cgminer/driver-hashfast.c

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• Hash : 21bbe20d
  Author :
  Date : 2013-09-30T08:45:44
  

  Remove now unnecessary forward declaration of hashfast_drv

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• driver-hashfast.c

• /*
   * Copyright 2013 Con Kolivas <kernel@kolivas.org>
   * Copyright 2013 Hashfast Inc.
   *
   * 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 "config.h"
  
  #include <stdbool.h>
  
  #include "usbutils.h"
  
  #include "driver-hashfast.h"
  
  ////////////////////////////////////////////////////////////////////////////////
  // Support for the CRC's used in header (CRC-8) and packet body (CRC-32)
  ////////////////////////////////////////////////////////////////////////////////
  
  #define GP8  0x107   /* x^8 + x^2 + x + 1 */
  #define DI8  0x07
  
  static unsigned char crc8_table[256];	/* CRC-8 table */
  static uint32_t crc32_table[256];	/* CRC-32 table */
  
  void hf_init_crc8(void)
  {
  	int i,j;
  	unsigned char crc;
  
  	for (i = 0; i < 256; i++) {
  		crc = i;
  		for (j = 0; j < 8; j++)
  			crc = (crc << 1) ^ ((crc & 0x80) ? DI8 : 0);
  		crc8_table[i] = crc & 0xFF;
  	}
  }
  
  static unsigned char __maybe_unused hf_crc8(unsigned char *h)
  {
  	int i;
  	unsigned char crc;
  
  	h++;	// Preamble not included
  	for (i = 1, crc = 0xff; i < 7; i++)
  		crc = crc8_table[crc ^ *h++];
  
  	return crc;
  }
  
  #define DI32 0x04c11db7L
  
  void hf_init_crc32(void)
  {
  	uint32_t i, j;
  	uint32_t crc;
  
  	for (i = 0; i < 256; i++){
  		crc = i << 24;
  		for (j = 0; j < 8; j++) {
  			if (crc & 0x80000000L)
  				crc = (crc << 1) ^ DI32;
  			else
  				crc = (crc << 1);
  		}
  		crc32_table[i] = crc;
  	}
  }
  
  static uint32_t __maybe_unused hf_crc32(unsigned char *p, int len, int plug_in)
  {
  	uint32_t crc = 0xffffffffU, crc_sav;
  	uint32_t i;
  
  	while (len--) {
  		i = ((crc >> 24) ^ *p++) & 0xff;
  		crc = (crc << 8) ^ crc32_table[i];
  	}
  
  	crc_sav = crc;
  
  	applog(LOG_DEBUG, "hf_crc32: crc is 0x%08x", crc);
  
  	if (plug_in) {
  		for (i = 0; i < 4; i++, crc >>= 8)
  			*p++ = crc & 0xff;
  	}
  
  	return crc_sav;
  }
  
  static hf_info_t **hashfast_infos;
  
  struct hf_cmd {
  	int cmd;
  	char *cmd_name;
  	enum usb_cmds usb_cmd;
  };
  
  #define C_NULL C_MAX
  static const struct hf_cmd hf_cmds[] = {
  	{OP_NULL, "OP_NULL", C_NULL},
  	{OP_ROOT, "OP_ROOT", C_NULL},
  	{OP_RESET, "OP_RESET", C_HF_RESET},
  	{OP_PLL_CONFIG, "OP_PLL_CONFIG", C_HF_PLL_CONFIG},
  	{OP_ADDRESS, "OP_ADDRESS", C_HF_ADDRESS},
  	{OP_READDRESS, "OP_READDRESS", C_NULL},
  	{OP_HIGHEST, "OP_HIGHEST", C_NULL},
  	{OP_BAUD, "OP_BAUD", C_HF_BAUD},
  	{OP_UNROOT, "OP_UNROOT", C_NULL},
  	{OP_HASH, "OP_HASH", C_HF_HASH},
  	{OP_NONCE, "OP_NONCE", C_HF_NONCE},
  	{OP_ABORT, "OP_ABORT", C_HF_ABORT},
  	{OP_STATUS, "OP_STATUS", C_HF_STATUS},
  	{OP_GPIO, "OP_GPIO", C_NULL},
  	{OP_CONFIG, "OP_CONFIG", C_HF_CONFIG},
  	{OP_STATISTICS, "OP_STATISTICS", C_HF_STATISTICS},
  	{OP_GROUP, "OP_GROUP", C_NULL},
  	{OP_CLOCKGATE, "OP_CLOCKGATE", C_HF_CLOCKGATE}
  };
  
  /* Send an arbitrary frame, consisting of an 8 byte header and an optional
   * packet body. */
  
  static int __maybe_unused hashfast_send_frame(struct cgpu_info *hashfast, uint8_t opcode,
  			       uint8_t chip, uint8_t core, uint16_t hdata,
  			       uint8_t *data, int len)
  {
  	int tx_length, ret, amount, id = hashfast->device_id;
  	uint8_t packet[256];
  	struct hf_header *p = (struct hf_header *)packet;
  
  	p->preamble = HF_PREAMBLE;
  	p->operation_code = opcode;
  	p->chip_address = chip;
  	p->core_address = core;
  	p->hdata = htole16(hdata);
  	p->data_length = len / 4;
  	p->crc8 = hf_crc8(packet);
  	tx_length = sizeof(struct hf_header);
  	if (len) {
  		memcpy(&packet[sizeof(struct hf_header)], data, len);
  		hf_crc32(&packet[sizeof(struct hf_header)], len, 1);
  		tx_length += len + 4;
  	}
  
  	ret = usb_write(hashfast, (char *)packet, tx_length, &amount,
  			hf_cmds[opcode].usb_cmd);
  	if (ret < 0 || amount != tx_length) {
  		applog(LOG_ERR, "HF%d: hashfast_send_frame: USB Send error, ret %d amount %d vs. tx_length %d",
  		       id, ret, amount, tx_length);
  		return 1;
  	}
  	return 0;
  }
  
  static int hashfast_reset(struct cgpu_info __maybe_unused *hashfast)
  {
  	return 0;
  }
  
  static bool hashfast_detect_common(struct cgpu_info *hashfast, int baud)
  {
  	hf_core_t **c, *core;
  	hf_info_t *info;
  	hf_job_t *j;
  	int i, k, ret;
  
  	hashfast_infos = realloc(hashfast_infos, sizeof(hf_info_t *) * (total_devices + 1));
  	if (unlikely(!hashfast_infos))
  		quit(1, "Failed to realloc hashfast_infos in hashfast_detect_common");
  	// Assume success, allocate info ahead of reset, so reset can fill fields in
  	info = calloc(sizeof(hf_info_t), 1);
  	if (unlikely(!info))
  		quit(1, "Failed to calloc info in hashfast_detect_common");
  	hashfast_infos[hashfast->device_id] = info;
  	info->tacho_enable = 1;
  	info->miner_count = 1;
  	info->max_search_difficulty = 12;
  	info->baud_rate = baud;
  
  	ret = hashfast_reset(hashfast);
  	if (unlikely(ret)) {
  		free(info);
  		hashfast_infos[hashfast->device_id] = NULL;
  		return false;
  	}
  
  	/* 1 Pending, 1 active for each */
  	info->inflight_target = info->asic_count * info->core_count *2;
  
  	switch (info->device_type) {
  		default:
  		case HFD_G1:
  			/* Implies hash_loops = 0 for full nonce range */
  			break;
  		case HFD_ExpressAGX:
  			/* ExpressAGX */
  			info->hash_loops = 1 << 26;
  			break;
  		case HFD_VC709:
  			/* Virtex 7
  			 * Adjust according to fast or slow configuration */
  			if (info->core_count > 5)
  				info->hash_loops = 1 << 26;
  			else
  				info->hash_loops = 1 << 30;
  			break;
  	}
  	applog(LOG_INFO, "Hashfast Detect: chips %d cores %d inflight_target %d entries",
  	       info->asic_count, info->core_count, info->inflight_target);
  
  	/* Initialize list heads */
  	info->active.next = &info->active;
  	info->active.prev = &info->active;
  	info->inactive.next = &info->inactive;
  	info->inactive.prev = &info->inactive;
  
  	/* Allocate core data structures */
  	info->cores = calloc(info->asic_count, sizeof(hf_core_t  *));
  	if (unlikely(!info->cores))
  		quit(1, "Failed to calloc info cores in hashfast_detect_common");
  	c = info->cores;
  
  	for (i = 0; i < info->asic_count; i++) {
  		*c = calloc(info->core_count, sizeof(hf_core_t));
  		if (unlikely(!*c))
  			quit(1, "Failed to calloc hf_core_t in hashfast_detect_common");
  		for (k = 0, core = *c; k < info->core_count; k++, core++)
  			core->enabled = 1;
  		c++;
  	}
  
  	/* Now allocate enough structures to hold all the in-flight work
  	 * 2 per core - one active and one pending. These go on the inactive
  	 * queue, and get used/recycled as required. */
  	for (i = 0; i < info->asic_count * info->core_count * 2; i++) {
  		j = calloc(sizeof(hf_job_t), 1);
  		if (unlikely(!j))
  			quit(1, "Failed to calloc hf_job_t in hashfast_detect_common");
  		list_add(&info->inactive, &j->l);
  	}
  
  	info->inactive_count = info->asic_count * info->core_count * 2;
  	applog(LOG_INFO, "Hashfast Detect: Allocated %d job entries",
  	       info->inflight_target);
  
  		// Finally, allocate enough space to hold the work array.
  	info->max_work = info->inflight_target;
  	info->num_sequence = 1024;
  
  	info->work = calloc(info->max_work, sizeof(hf_work_t));
  	if (unlikely(!info->work))
  		quit(1, "Failed to calloc info work in hashfast_detect_common");
  	applog(LOG_INFO, "Hashfast Detect: Allocated space for %d work entries", info->inflight_target);
  
  	return true;
  }
  
  static void hashfast_usb_initialise(struct cgpu_info *hashfast)
  {
  	if (hashfast->usbinfo.nodev)
  		return;
  	// FIXME Do necessary initialising here
  }
  
  static bool hashfast_detect_one_usb(libusb_device *dev, struct usb_find_devices *found)
  {
  	struct cgpu_info *hashfast;
  	int baud = DEFAULT_BAUD_RATE;
  
  	hashfast = usb_alloc_cgpu(&hashfast_drv, HASHFAST_MINER_THREADS);
  	if (!hashfast)
  		return false;
  
  	if (!usb_init(hashfast, dev, found)) {
  		free(hashfast->device_data);
  		hashfast->device_data = NULL;
  		hashfast = usb_free_cgpu(hashfast);
  		return false;
  	}
  
  	hashfast->usbdev->usb_type = USB_TYPE_STD;
  	usb_set_pps(hashfast, HASHFAST_USB_PACKETSIZE);
  
  	hashfast_usb_initialise(hashfast);
  
  	add_cgpu(hashfast);
  	return hashfast_detect_common(hashfast, baud);
  }
  
  static void hashfast_detect(bool hotplug)
  {
  	/* Set up the CRC tables only once. */
  	if (!hotplug) {
  		hf_init_crc8();
  		hf_init_crc32();
  	}
  	usb_detect(&hashfast_drv, hashfast_detect_one_usb);
  }
  
  static bool hashfast_prepare(struct thr_info __maybe_unused *thr)
  {
  	return true;
  }
  
  static bool hashfast_fill(struct cgpu_info __maybe_unused *hashfast)
  {
  	return true;
  }
  
  static int64_t hashfast_scanhash(struct thr_info __maybe_unused *thr)
  {
  	return 0;
  }
  
  static struct api_data *hashfast_api_stats(struct cgpu_info __maybe_unused *cgpu)
  {
  	return NULL;
  }
  
  static void hashfast_init(struct cgpu_info *hashfast)
  {
  	usb_buffer_enable(hashfast);
  }
  
  static void hashfast_shutdown(struct thr_info __maybe_unused *thr)
  {
  }
  
  struct device_drv hashfast_drv = {
  	.drv_id = DRIVER_hashfast,
  	.dname = "Hashfast",
  	.name = "HFA",
  	.drv_detect = hashfast_detect,
  	.thread_prepare = hashfast_prepare,
  	.hash_work = hash_queued_work,
  	.queue_full = hashfast_fill,
  	.scanwork = hashfast_scanhash,
  	.get_api_stats = hashfast_api_stats,
  	.reinit_device = hashfast_init,
  	.thread_shutdown = hashfast_shutdown,
  };
  

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