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driver-SPI-bitmine-A1.c
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driver-SPI-bitmine-A1.c
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/*
* cgminer SPI driver for Bitmine.ch A1 devices
*
* Copyright 2013, 2014 Zefir Kurtisi <[email protected]>
*
* 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 <stdlib.h>
#include <assert.h>
#include <fcntl.h>
#include <limits.h>
#include <unistd.h>
#include <stdbool.h>
#include "spi-context.h"
#include "logging.h"
#include "miner.h"
#include "util.h"
///////////////////////////////////////////////////////////////////////////
#if 1
#define MAX_BOARDS 5
/*
* TODO: yes, we include a C file for now until we set up a framework
* to support different variants of A1 products
*/
#include "A1-desk-board-selector-tca9535.c"
#else
#define MAX_BOARDS 1
bool a1_board_selector_init() { return true; }
void a1_board_selector_exit() {}
void a1_board_selector_reset_all_boards() {}
void a1_board_selector_select_board(uint8_t b) {};
void unlock_board_selector() {}
#endif
///////////////////////////////////////////////////////////////////////////
/********** work queue */
struct work_ent {
struct work *work;
struct list_head head;
};
struct work_queue {
int num_elems;
struct list_head head;
};
static bool wq_enqueue(struct work_queue *wq, struct work *work)
{
if (work == NULL)
return false;
struct work_ent *we = malloc(sizeof(*we));
assert(we != NULL);
we->work = work;
INIT_LIST_HEAD(&we->head);
list_add_tail(&we->head, &wq->head);
wq->num_elems++;
return true;
}
static struct work *wq_dequeue(struct work_queue *wq)
{
if (wq == NULL)
return NULL;
if (wq->num_elems == 0)
return NULL;
struct work_ent *we;
we = list_entry(wq->head.next, struct work_ent, head);
struct work *work = we->work;
list_del(&we->head);
free(we);
wq->num_elems--;
return work;
}
/********** chip and chain context structures */
/*
* if not cooled sufficiently, communication fails and chip is temporary
* disabled. we let it inactive for 30 seconds to cool down
*
* TODO: to be removed after bring up / test phase
*/
#define COOLDOWN_MS (30 * 1000)
/* if after this number of retries a chip is still inaccessible, disable it */
#define DISABLE_CHIP_FAIL_THRESHOLD 7
/* the WRITE_JOB command is the largest (2 bytes command, 56 bytes payload) */
#define WRITE_JOB_LENGTH 58
#define MAX_CHAIN_LENGTH 64
/*
* For commands to traverse the chain, we need to issue dummy writes to
* keep SPI clock running. To reach the last chip in the chain, we need to
* write the command, followed by chain-length words to pass it through the
* chain and another chain-length words to get the ACK back to host
*/
#define MAX_CMD_LENGTH (WRITE_JOB_LENGTH + MAX_CHAIN_LENGTH * 2 * 2)
struct A1_chip {
int num_cores;
int last_queued_id;
struct work *work[4];
/* stats */
int hw_errors;
int stales;
int nonces_found;
int nonce_ranges_done;
/* systime in ms when chip was disabled */
int cooldown_begin;
/* number of consecutive failures to access the chip */
int fail_count;
/* mark chip disabled, do not try to re-enable it */
bool disabled;
};
struct A1_chain {
int board_id;
struct cgpu_info *cgpu;
int num_chips;
int num_cores;
int num_active_chips;
int chain_skew;
uint8_t spi_tx[MAX_CMD_LENGTH];
uint8_t spi_rx[MAX_CMD_LENGTH];
struct spi_ctx *spi_ctx;
struct A1_chip *chips;
pthread_mutex_t lock;
struct work_queue active_wq;
};
enum A1_command {
A1_BIST_START = 0x01,
A1_BIST_FIX = 0x03,
A1_RESET = 0x04,
A1_WRITE_JOB = 0x07,
A1_READ_RESULT = 0x08,
A1_WRITE_REG = 0x09,
A1_READ_REG = 0x0a,
A1_READ_REG_RESP = 0x1a,
};
/********** config paramters */
struct A1_config_options {
int ref_clk_khz;
int sys_clk_khz;
int spi_clk_khz;
/* limit chip chain to this number of chips (testing only) */
int override_chip_num;
};
/*
* for now, we have one global config, defaulting values:
* - ref_clk 16MHz / sys_clk 800MHz
* - 2000 kHz SPI clock
*/
static struct A1_config_options config_options = {
.ref_clk_khz = 16000, .sys_clk_khz = 800000, .spi_clk_khz = 2000,
};
/* override values with --bitmine-a1-options ref:sys:spi: - use 0 for default */
static struct A1_config_options *parsed_config_options;
/********** temporary helper for hexdumping SPI traffic */
static void applog_hexdump(char *prefix, uint8_t *buff, int len, int level)
{
static char line[256];
char *pos = line;
int i;
if (len < 1)
return;
pos += sprintf(pos, "%s: %d bytes:", prefix, len);
for (i = 0; i < len; i++) {
if (i > 0 && (i % 32) == 0) {
applog(LOG_DEBUG, "%s", line);
pos = line;
pos += sprintf(pos, "\t");
}
pos += sprintf(pos, "%.2X ", buff[i]);
}
applog(LOG_DEBUG, "%s", line);
}
static void hexdump(char *prefix, uint8_t *buff, int len)
{
applog_hexdump(prefix, buff, len, LOG_DEBUG);
}
static void hexdump_error(char *prefix, uint8_t *buff, int len)
{
applog_hexdump(prefix, buff, len, LOG_ERR);
}
static void flush_spi(struct A1_chain *a1)
{
memset(a1->spi_tx, 0, 64);
spi_transfer(a1->spi_ctx, a1->spi_tx, a1->spi_rx, 64);
}
/********** upper layer SPI functions */
static uint8_t *exec_cmd(struct A1_chain *a1,
uint8_t cmd, uint8_t chip_id,
uint8_t *data, uint8_t len,
uint8_t resp_len)
{
int tx_len = 4 + len;
memset(a1->spi_tx, 0, tx_len);
a1->spi_tx[0] = cmd;
a1->spi_tx[1] = chip_id;
if (data != NULL)
memcpy(a1->spi_tx + 2, data, len);
bool retval = spi_transfer(a1->spi_ctx, a1->spi_tx, a1->spi_rx, tx_len);
hexdump("send: TX", a1->spi_tx, tx_len);
hexdump("send: RX", a1->spi_rx, tx_len);
int poll_len = resp_len;
if (chip_id == 0) {
if (a1->num_chips == 0) {
applog(LOG_ERR, "%d: unknown chips in chain, assuming 8",
a1->board_id);
poll_len += 32;
}
poll_len += 4 * a1->num_chips;
}
else {
poll_len += 4 * chip_id - 2;
}
assert(spi_transfer(a1->spi_ctx, NULL, a1->spi_rx + tx_len, poll_len));
hexdump("poll: RX", a1->spi_rx + tx_len, poll_len);
int ack_len = tx_len + resp_len;
int ack_pos = tx_len + poll_len - ack_len;
hexdump("poll: ACK", a1->spi_rx + ack_pos, ack_len - 2);
return (a1->spi_rx + ack_pos);
}
/********** A1 SPI commands */
static uint8_t *cmd_BIST_FIX_BCAST(struct A1_chain *a1)
{
uint8_t *ret = exec_cmd(a1, A1_BIST_FIX, 0x00, NULL, 0, 0);
if (ret == NULL || ret[0] != A1_BIST_FIX) {
applog(LOG_ERR, "%d: cmd_BIST_FIX_BCAST failed", a1->board_id);
return NULL;
}
return ret;
}
static uint8_t *cmd_RESET_BCAST(struct A1_chain *a1, uint8_t strategy)
{
static uint8_t s[2];
s[0] = strategy;
s[1] = strategy;
uint8_t *ret = exec_cmd(a1, A1_RESET, 0x00, s, 2, 0);
if (ret == NULL || (ret[0] != A1_RESET && a1->num_chips != 0)) {
applog(LOG_ERR, "%d: cmd_RESET_BCAST failed", a1->board_id);
return NULL;
}
return ret;
}
static uint8_t *cmd_READ_RESULT_BCAST(struct A1_chain *a1)
{
int tx_len = 8;
memset(a1->spi_tx, 0, tx_len);
a1->spi_tx[0] = A1_READ_RESULT;
bool retval = spi_transfer(a1->spi_ctx, a1->spi_tx, a1->spi_rx, tx_len);
hexdump("send: TX", a1->spi_tx, tx_len);
hexdump("send: RX", a1->spi_rx, tx_len);
int poll_len = tx_len + 4 * a1->num_chips;
retval = spi_transfer(a1->spi_ctx, NULL, a1->spi_rx + tx_len, poll_len);
hexdump("poll: RX", a1->spi_rx + tx_len, poll_len);
uint8_t *scan = a1->spi_rx;
int i;
for (i = 0; i < poll_len; i += 2) {
if ((scan[i] & 0x0f) == A1_READ_RESULT) {
return scan + i;
}
}
applog(LOG_ERR, "%d: cmd_READ_RESULT_BCAST failed", a1->board_id);
return NULL;
}
static uint8_t *cmd_WRITE_REG(struct A1_chain *a1, uint8_t chip, uint8_t *reg)
{
uint8_t *ret = exec_cmd(a1, A1_WRITE_REG, chip, reg, 6, 0);
if (ret == NULL || ret[0] != A1_WRITE_REG) {
applog(LOG_ERR, "%d: cmd_WRITE_REG failed", a1->board_id);
return NULL;
}
return ret;
}
static uint8_t *cmd_READ_REG(struct A1_chain *a1, uint8_t chip)
{
uint8_t *ret = exec_cmd(a1, A1_READ_REG, chip, NULL, 0, 6);
if (ret == NULL || ret[0] != A1_READ_REG_RESP || ret[1] != chip) {
applog(LOG_ERR, "%d: cmd_READ_REG chip %d failed",
a1->board_id, chip);
return NULL;
}
memcpy(a1->spi_rx, ret, 8);
return ret;
}
static uint8_t *cmd_WRITE_JOB(struct A1_chain *a1, uint8_t chip_id,
uint8_t *job)
{
uint8_t cmd = (a1->spi_tx[0] << 8) | a1->spi_tx[1];
/* ensure we push the SPI command to the last chip in chain */
int tx_len = WRITE_JOB_LENGTH + 2;
memcpy(a1->spi_tx, job, WRITE_JOB_LENGTH);
memset(a1->spi_tx + WRITE_JOB_LENGTH, 0, tx_len - WRITE_JOB_LENGTH);
bool retval = spi_transfer(a1->spi_ctx, a1->spi_tx, a1->spi_rx, tx_len);
hexdump("send: TX", a1->spi_tx, tx_len);
hexdump("send: RX", a1->spi_rx, tx_len);
int poll_len = 4 * chip_id - 2;
retval = spi_transfer(a1->spi_ctx, NULL, a1->spi_rx + tx_len, poll_len);
hexdump("poll: RX", a1->spi_rx + tx_len, poll_len);
int ack_len = tx_len;
int ack_pos = tx_len + poll_len - ack_len;
hexdump("poll: ACK", a1->spi_rx + ack_pos, tx_len);
uint8_t *ret = a1->spi_rx + ack_pos;
if (ret[0] != a1->spi_tx[0] || ret[1] != a1->spi_tx[1]){
applog(LOG_ERR, "%d: cmd_WRITE_JOB failed: "
"0x%02x%02x/0x%02x%02x", a1->board_id,
ret[0], ret[1], a1->spi_tx[0], a1->spi_tx[1]);
return NULL;
}
return ret;
}
/********** A1 low level functions */
static bool A1_hw_reset(void)
{
/*
* TODO: issue cold reset
*
* NOTE: suggested sequence
* a) reset the RSTN pin for at least 1s
* b) release the RSTN pin
* c) wait at least 1s before sending the first CMD
*/
if (!a1_board_selector_init()) {
applog(LOG_ERR, "Failed to init board selector");
a1_board_selector_exit();
return false;
}
a1_board_selector_reset_all_boards();
return true;
}
#define MAX_PLL_WAIT_CYCLES 25
#define PLL_CYCLE_WAIT_TIME 40
static bool check_chip_pll_lock(struct A1_chain *a1, int chip_id, uint8_t *wr)
{
int n;
for (n = 0; n < MAX_PLL_WAIT_CYCLES; n++) {
/* check for PLL lock status */
if (cmd_READ_REG(a1, chip_id) && (a1->spi_rx[4] & 1) == 1)
/* double check that we read back what we set before */
return wr[0] == a1->spi_rx[2] && wr[1] == a1->spi_rx[3];
cgsleep_ms(PLL_CYCLE_WAIT_TIME);
}
applog(LOG_ERR, "%d: chip %d failed PLL lock", a1->board_id, chip_id);
return false;
}
static uint8_t *get_pll_reg(struct A1_chain *a1, int ref_clock_khz,
int sys_clock_khz)
{
/*
* TODO: this is only an initial approach with binary adjusted
* dividers and thus not exploiting the whole divider range.
*
* If required, the algorithm can be adapted to find the PLL
* parameters after:
*
* sys_clk = (ref_clk * pll_fbdiv) / (pll_prediv * 2^(pll_postdiv - 1))
*
* with a higher pll_postdiv being desired over a higher pll_prediv
*/
static uint8_t writereg[6] = { 0x00, 0x00, 0x21, 0x84, };
uint8_t pre_div = 1;
uint8_t post_div = 1;
uint32_t fb_div = sys_clock_khz / ref_clock_khz;
int bid = a1->board_id;
applog(LOG_WARNING, "%d: Setting PLL: CLK_REF=%dMHz, SYS_CLK=%dMHz",
bid, ref_clock_khz / 1000, sys_clock_khz / 1000);
while (fb_div > 511) {
if (post_div < 4)
post_div++;
else
pre_div <<= 1;
fb_div >>= 1;
}
if (pre_div > 31) {
applog(LOG_WARNING, "%d: can't set PLL parameters", bid);
return NULL;
}
writereg[0] = (post_div << 6) | (pre_div << 1) | (fb_div >> 8);
writereg[1] = fb_div & 0xff;
applog(LOG_WARNING, "%d: setting PLL: pre_div=%d, post_div=%d, fb_div=%d"
": 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x", bid,
pre_div, post_div, fb_div,
writereg[0], writereg[1], writereg[2],
writereg[3], writereg[4], writereg[5]);
return writereg;
}
static bool set_pll_config(struct A1_chain *a1, int chip_id,
int ref_clock_khz, int sys_clock_khz)
{
uint8_t *writereg = get_pll_reg(a1, ref_clock_khz, sys_clock_khz);
if (writereg == NULL)
return false;
if (!cmd_WRITE_REG(a1, chip_id, writereg))
return false;
int from, to;
if (chip_id == 0) {
from = 0;
to = a1->num_active_chips;
} else {
from = chip_id - 1;
to = chip_id - 1;
}
int i;
for (i = from; i < to; i++) {
int cid = i + 1;
if (!check_chip_pll_lock(a1, chip_id, writereg)) {
applog(LOG_ERR, "%d: chip %d failed PLL lock",
a1->board_id, cid);
return false;
}
}
return true;
}
#define WEAK_CHIP_THRESHOLD 30
#define BROKEN_CHIP_THRESHOLD 26
#define WEAK_CHIP_SYS_CLK (600 * 1000)
#define BROKEN_CHIP_SYS_CLK (400 * 1000)
static bool check_chip(struct A1_chain *a1, int i)
{
int chip_id = i + 1;
int bid = a1->board_id;
if (!cmd_READ_REG(a1, chip_id)) {
applog(LOG_WARNING, "%d: Failed to read register for "
"chip %d -> disabling", bid, chip_id);
a1->chips[i].num_cores = 0;
a1->chips[i].disabled = 1;
return false;;
}
a1->chips[i].num_cores = a1->spi_rx[7];
a1->num_cores += a1->chips[i].num_cores;
applog(LOG_WARNING, "%d: Found chip %d with %d active cores",
bid, chip_id, a1->chips[i].num_cores);
if (a1->chips[i].num_cores < BROKEN_CHIP_THRESHOLD) {
applog(LOG_WARNING, "%d: broken chip %d with %d active "
"cores (threshold = %d)", bid, chip_id,
a1->chips[i].num_cores, BROKEN_CHIP_THRESHOLD);
set_pll_config(a1, chip_id, config_options.ref_clk_khz,
BROKEN_CHIP_SYS_CLK);
cmd_READ_REG(a1, chip_id);
hexdump_error("new.PLL", a1->spi_rx, 8);
a1->chips[i].disabled = true;
a1->num_cores -= a1->chips[i].num_cores;
return false;
}
if (a1->chips[i].num_cores < WEAK_CHIP_THRESHOLD) {
applog(LOG_WARNING, "%d: weak chip %d with %d active "
"cores (threshold = %d)", bid,
chip_id, a1->chips[i].num_cores, WEAK_CHIP_THRESHOLD);
set_pll_config(a1, chip_id, config_options.ref_clk_khz,
WEAK_CHIP_SYS_CLK);
cmd_READ_REG(a1, chip_id);
hexdump_error("new.PLL", a1->spi_rx, 8);
return false;
}
return true;
}
/*
* BIST_START works only once after HW reset, on subsequent calls it
* returns 0 as number of chips.
*/
static int chain_detect(struct A1_chain *a1)
{
int tx_len = 6;
memset(a1->spi_tx, 0, tx_len);
a1->spi_tx[0] = A1_BIST_START;
a1->spi_tx[1] = 0;
if (!spi_transfer(a1->spi_ctx, a1->spi_tx, a1->spi_rx, tx_len))
return 0;
hexdump("TX", a1->spi_tx, 6);
hexdump("RX", a1->spi_rx, 6);
int i;
int bid = a1->board_id;
int max_poll_words = MAX_CHAIN_LENGTH * 2;
for(i = 1; i < max_poll_words; i++) {
if (a1->spi_rx[0] == A1_BIST_START && a1->spi_rx[1] == 0) {
spi_transfer(a1->spi_ctx, NULL, a1->spi_rx, 2);
hexdump("RX", a1->spi_rx, 2);
uint8_t n = a1->spi_rx[1];
a1->num_chips = (i / 2) + 1;
if (a1->num_chips != n) {
applog(LOG_ERR, "%d: enumeration: %d <-> %d",
bid, a1->num_chips, n);
if (n != 0)
a1->num_chips = n;
}
applog(LOG_WARNING, "%d: detected %d chips",
bid, a1->num_chips);
return a1->num_chips;
}
bool s = spi_transfer(a1->spi_ctx, NULL, a1->spi_rx, 2);
hexdump("RX", a1->spi_rx, 2);
if (!s)
return 0;
}
applog(LOG_WARNING, "%d: no A1 chip-chain detected", bid);
return 0;
}
/********** disable / re-enable related section (temporary for testing) */
static int get_current_ms(void)
{
cgtimer_t ct;
cgtimer_time(&ct);
return cgtimer_to_ms(&ct);
}
static bool is_chip_disabled(struct A1_chain *a1, uint8_t chip_id)
{
struct A1_chip *chip = &a1->chips[chip_id - 1];
return chip->disabled || chip->cooldown_begin != 0;
}
/* check and disable chip, remember time */
static void disable_chip(struct A1_chain *a1, uint8_t chip_id)
{
flush_spi(a1);
struct A1_chip *chip = &a1->chips[chip_id - 1];
int bid = a1->board_id;
if (is_chip_disabled(a1, chip_id)) {
applog(LOG_WARNING, "%d: chip %d already disabled",
bid, chip_id);
return;
}
applog(LOG_WARNING, "%d: temporary disabling chip %d", bid, chip_id);
chip->cooldown_begin = get_current_ms();
}
/* check if disabled chips can be re-enabled */
void check_disabled_chips(struct A1_chain *a1)
{
int i;
int bid = a1->board_id;
for (i = 0; i < a1->num_active_chips; i++) {
int chip_id = i + 1;
struct A1_chip *chip = &a1->chips[i];
if (!is_chip_disabled(a1, chip_id))
continue;
/* do not re-enable fully disabled chips */
if (chip->disabled)
continue;
if (chip->cooldown_begin + COOLDOWN_MS > get_current_ms())
continue;
if (!cmd_READ_REG(a1, chip_id)) {
chip->fail_count++;
applog(LOG_WARNING, "%d: chip %d not yet working - %d",
bid, chip_id, chip->fail_count);
if (chip->fail_count > DISABLE_CHIP_FAIL_THRESHOLD) {
applog(LOG_WARNING,
"%d: completely disabling chip %d at %d",
bid, chip_id, chip->fail_count);
chip->disabled = true;
a1->num_cores -= chip->num_cores;
continue;
}
/* restart cooldown period */
chip->cooldown_begin = get_current_ms();
continue;
}
applog(LOG_WARNING, "%d: chip %d is working again",
bid, chip_id);
chip->cooldown_begin = 0;
chip->fail_count = 0;
}
}
/********** job creation and result evaluation */
uint32_t get_diff(double diff)
{
uint32_t n_bits;
int shift = 29;
double f = (double) 0x0000ffff / diff;
while (f < (double) 0x00008000) {
shift--;
f *= 256.0;
}
while (f >= (double) 0x00800000) {
shift++;
f /= 256.0;
}
n_bits = (int) f + (shift << 24);
return n_bits;
}
static uint8_t *create_job(uint8_t chip_id, uint8_t job_id, struct work *work)
{
static uint8_t job[WRITE_JOB_LENGTH] = {
/* command */
0x00, 0x00,
/* midstate */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* wdata */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
/* start nonce */
0x00, 0x00, 0x00, 0x00,
/* difficulty 1 */
0xff, 0xff, 0x00, 0x1d,
/* end nonce */
0xff, 0xff, 0xff, 0xff,
};
uint8_t *midstate = work->midstate;
uint8_t *wdata = work->data + 64;
uint32_t *p1 = (uint32_t *) &job[34];
uint32_t *p2 = (uint32_t *) wdata;
job[0] = (job_id << 4) | A1_WRITE_JOB;
job[1] = chip_id;
swab256(job + 2, midstate);
p1[0] = bswap_32(p2[0]);
p1[1] = bswap_32(p2[1]);
p1[2] = bswap_32(p2[2]);
p1[4] = get_diff(work->sdiff);
return job;
}
/* set work for given chip, returns true if a nonce range was finished */
static bool set_work(struct A1_chain *a1, uint8_t chip_id, struct work *work,
uint8_t queue_states)
{
int bid = a1->board_id;
struct A1_chip *chip = &a1->chips[chip_id - 1];
bool retval = false;
int job_id = chip->last_queued_id + 1;
applog(LOG_INFO, "%d: queuing chip %d with job_id %d, state=0x%02x",
bid, chip_id, job_id, queue_states);
if (job_id == (queue_states & 0x0f) || job_id == (queue_states >> 4))
applog(LOG_WARNING, "%d: job overlap: %d, 0x%02x",
bid, job_id, queue_states);
if (chip->work[chip->last_queued_id] != NULL) {
work_completed(a1->cgpu, chip->work[chip->last_queued_id]);
chip->work[chip->last_queued_id] = NULL;
retval = true;
}
uint8_t *jobdata = create_job(chip_id, job_id, work);
if (!cmd_WRITE_JOB(a1, chip_id, jobdata)) {
/* give back work */
work_completed(a1->cgpu, work);
applog(LOG_ERR, "%d: failed to set work for chip %d.%d",
bid, chip_id, job_id);
// TODO: what else?
} else {
chip->work[chip->last_queued_id] = work;
chip->last_queued_id++;
chip->last_queued_id &= 3;
}
return retval;
}
static bool get_nonce(struct A1_chain *a1, uint8_t *nonce,
uint8_t *chip, uint8_t *job_id)
{
uint8_t *ret = cmd_READ_RESULT_BCAST(a1);
if (ret == NULL)
return false;
if (ret[1] == 0) {
applog(LOG_DEBUG, "%d: output queue empty", a1->board_id);
return false;
}
*job_id = ret[0] >> 4;
*chip = ret[1];
memcpy(nonce, ret + 2, 4);
return true;
}
/* reset input work queues in chip chain */
static bool abort_work(struct A1_chain *a1)
{
/* drop jobs already queued: reset strategy 0xed */
return cmd_RESET_BCAST(a1, 0xed);
}
/********** driver interface */
void exit_A1_chain(struct A1_chain *a1)
{
if (a1 == NULL)
return;
free(a1->chips);
a1->chips = NULL;
spi_exit(a1->spi_ctx);
a1->spi_ctx = NULL;
free(a1);
}
struct A1_chain *init_A1_chain(struct spi_ctx *ctx, int board_id)
{
int i;
struct A1_chain *a1 = malloc(sizeof(*a1));
assert(a1 != NULL);
applog(LOG_DEBUG, "%d: A1 init chain", a1->board_id);
memset(a1, 0, sizeof(*a1));
a1->spi_ctx = ctx;
a1->board_id = board_id;
a1->num_chips = chain_detect(a1);
if (a1->num_chips == 0)
goto failure;
applog(LOG_WARNING, "spidev%d.%d: %d: Found %d A1 chips",
a1->spi_ctx->config.bus, a1->spi_ctx->config.cs_line,
a1->board_id, a1->num_chips);
if (!set_pll_config(a1, 0, config_options.ref_clk_khz,
config_options.sys_clk_khz))
goto failure;
/* override max number of active chips if requested */
a1->num_active_chips = a1->num_chips;
if (config_options.override_chip_num > 0 &&
a1->num_chips > config_options.override_chip_num) {
a1->num_active_chips = config_options.override_chip_num;
applog(LOG_WARNING, "%d: limiting chain to %d chips",
a1->board_id, a1->num_active_chips);
}
a1->chips = calloc(a1->num_active_chips, sizeof(struct A1_chip));
assert (a1->chips != NULL);
if (!cmd_BIST_FIX_BCAST(a1))
goto failure;
for (i = 0; i < a1->num_active_chips; i++)
check_chip(a1, i);
applog(LOG_WARNING, "%d: found %d chips with total %d active cores",
a1->board_id, a1->num_active_chips, a1->num_cores);
mutex_init(&a1->lock);
INIT_LIST_HEAD(&a1->active_wq.head);
return a1;
failure:
exit_A1_chain(a1);
return NULL;
}
static bool A1_detect_one_chain(struct spi_config *cfg)
{
struct cgpu_info *cgpu;
int board_id;
for (board_id = 0; board_id < MAX_BOARDS; board_id++) {
struct spi_ctx *ctx = spi_init(cfg);
if (ctx == NULL)
return false;
applog(LOG_WARNING, "checking board %d...", board_id);
a1_board_selector_select_board(board_id);
// a1_board_selector_reset_board();
struct A1_chain *a1 = init_A1_chain(ctx, board_id);
unlock_board_selector();
if (a1 == NULL)
continue;
cgpu = malloc(sizeof(*cgpu));
assert(cgpu != NULL);
memset(cgpu, 0, sizeof(*cgpu));
cgpu->drv = &bitmineA1_drv;
cgpu->name = "BitmineA1";
cgpu->threads = 1;
cgpu->device_data = a1;
a1->cgpu = cgpu;
add_cgpu(cgpu);
}
return true;
}
#define MAX_SPI_BUS 1
#define MAX_SPI_CS 1
/* Probe SPI channel and register chip chain */
void A1_detect(bool hotplug)
{
int bus;
int cs_line;
int board_id;
/* no hotplug support for now */
if (hotplug)
return;
if (opt_bitmine_a1_options != NULL && parsed_config_options == NULL) {
int ref_clk = 0;
int sys_clk = 0;
int spi_clk = 0;
int override_chip_num = 0;
sscanf(opt_bitmine_a1_options, "%d:%d:%d:%d",
&ref_clk, &sys_clk, &spi_clk, &override_chip_num);
if (ref_clk != 0)
config_options.ref_clk_khz = ref_clk;
if (sys_clk != 0)
config_options.sys_clk_khz = sys_clk;
if (spi_clk != 0)
config_options.spi_clk_khz = spi_clk;
if (override_chip_num != 0)
config_options.override_chip_num = override_chip_num;
/* config options are global, scan them once */
parsed_config_options = &config_options;
}
applog(LOG_DEBUG, "A1 detect");
A1_hw_reset();
for (bus = 0; bus < MAX_SPI_BUS; bus++) {
for (cs_line = 0; cs_line < MAX_SPI_CS; cs_line++) {
struct spi_config cfg = default_spi_config;
cfg.mode = SPI_MODE_1;
cfg.speed = config_options.spi_clk_khz * 1000;
cfg.bus = bus;
cfg.cs_line = cs_line;
A1_detect_one_chain(&cfg);
}
}
}
static int64_t A1_scanwork(struct thr_info *thr)
{
int i;
struct cgpu_info *cgpu = thr->cgpu;
struct A1_chain *a1 = cgpu->device_data;
int32_t nonce_ranges_processed = 0;
a1_board_selector_select_board(a1->board_id);
applog(LOG_DEBUG, "A1 running scanwork");
uint32_t nonce;
uint8_t chip_id;
uint8_t job_id;
bool work_updated = false;
mutex_lock(&a1->lock);
int bid = a1->board_id;
/* poll queued results */
while (true) {
int res = get_nonce(a1, (uint8_t*)&nonce, &chip_id, &job_id);
if (res < 0) {
flush_spi(a1);
break;
}
if (res == 0)
break;
nonce = bswap_32(nonce);
work_updated = true;
if (chip_id < 1 || chip_id > a1->num_active_chips) {
applog(LOG_WARNING, "%d: wrong chip_id %d",
bid, chip_id);
continue;
}
if (job_id < 1 && job_id > 4) {
applog(LOG_WARNING, "%d: chip %d: result has wrong job_id %d",
bid, chip_id, job_id);
flush_spi(a1);
continue;
}
struct A1_chip *chip = &a1->chips[chip_id - 1];
struct work *work = chip->work[job_id - 1];
if (work == NULL) {
/* already been flushed => stale */
applog(LOG_WARNING, "%d: chip %d: stale nonce 0x%08x",
bid, chip_id, nonce);
chip->stales++;
continue;
}
if (!submit_nonce(thr, work, nonce)) {
applog(LOG_WARNING, "%d: chip %d: invalid nonce 0x%08x",
bid, chip_id, nonce);
chip->hw_errors++;
/* add a penalty of a full nonce range on HW errors */
nonce_ranges_processed--;
continue;
}
applog(LOG_DEBUG, "YEAH: %d: chip %d / job_id %d: nonce 0x%08x",
bid, chip_id, job_id, nonce);
chip->nonces_found++;
}
/* check for completed works */
for (i = a1->num_active_chips; i > 0; i--) {
uint8_t c = i;
if (is_chip_disabled(a1, c))
continue;
if (!cmd_READ_REG(a1, c)) {
disable_chip(a1, c);
continue;
}
uint8_t qstate = a1->spi_rx[5] & 3;
uint8_t qbuff = a1->spi_rx[6];
struct work *work;
struct A1_chip *chip = &a1->chips[i - 1];
switch(qstate) {
case 3:
continue;
case 2:
applog(LOG_ERR, "%d: chip %d: invalid state = 2",
bid, c);
continue;
case 1:
/* fall through */
case 0:
work_updated = true;
work = wq_dequeue(&a1->active_wq);
if (work == NULL) {
applog(LOG_ERR, "%d: chip %d: work underflow",
bid, c);
break;
}
if (set_work(a1, c, work, qbuff)) {
chip->nonce_ranges_done++;
nonce_ranges_processed++;
}
applog(LOG_DEBUG, "%d: chip %d: job done: %d/%d/%d/%d",
bid, c,
chip->nonce_ranges_done, chip->nonces_found,
chip->hw_errors, chip->stales);
break;
}
}
check_disabled_chips(a1);
mutex_unlock(&a1->lock);
unlock_board_selector();
if (nonce_ranges_processed < 0)