GOSTcoin support for ccminer CUDA miner project, compatible with most nvidia cards
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/**
* bmw-256 MDT
* tpruvot - 2015
*/
extern "C" {
#include "sph/sph_bmw.h"
}
#include <miner.h>
#include <cuda_helper.h>
static uint32_t *d_hash[MAX_GPUS];
extern void bmw256_midstate_init(int thr_id, uint32_t threads);
extern void bmw256_midstate_free(int thr_id);
extern void bmw256_setBlock_80(int thr_id, void *pdata);
extern void bmw256_cpu_hash_80(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_outputHash, int swap);
extern uint32_t cuda_check_hash_32(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_inputHash);
// CPU Hash
extern "C" void bmw_hash(void *state, const void *input)
{
uint32_t _ALIGN(64) hash[16];
sph_bmw256_context ctx;
sph_bmw256_init(&ctx);
sph_bmw256(&ctx, input, 80);
sph_bmw256_close(&ctx, (void*) hash);
memcpy(state, hash, 32);
}
static bool init[MAX_GPUS] = { 0 };
extern "C" int scanhash_bmw(int thr_id, struct work* work, uint32_t max_nonce, unsigned long *hashes_done)
{
uint32_t _ALIGN(64) endiandata[20];
uint32_t *pdata = work->data;
uint32_t *ptarget = work->target;
const uint32_t first_nonce = pdata[19];
uint32_t throughput = cuda_default_throughput(thr_id, 1U << 21);
if (init[thr_id]) throughput = min(throughput, max_nonce - first_nonce);
if (opt_benchmark)
ptarget[7] = 0x0005;
if (!init[thr_id]) {
cudaSetDevice(device_map[thr_id]);
if (opt_cudaschedule == -1 && gpu_threads == 1) {
cudaDeviceReset();
// reduce cpu usage
cudaSetDeviceFlags(cudaDeviceScheduleBlockingSync);
}
gpulog(LOG_INFO, thr_id, "Intensity set to %g, %u cuda threads", throughput2intensity(throughput), throughput);
cuda_check_cpu_init(thr_id, throughput);
bmw256_midstate_init(thr_id, throughput);
CUDA_SAFE_CALL(cudaMalloc(&d_hash[thr_id], (size_t)32 * throughput));
init[thr_id] = true;
}
for (int k=0; k < 20; k++) {
be32enc(&endiandata[k], ((uint32_t*)pdata)[k]);
}
cudaGetLastError();
bmw256_setBlock_80(thr_id, (void*)endiandata);
cuda_check_cpu_setTarget(ptarget);
do {
bmw256_cpu_hash_80(thr_id, (int) throughput, pdata[19], d_hash[thr_id], 1);
*hashes_done = pdata[19] - first_nonce + throughput;
work->nonces[0] = cuda_check_hash_32(thr_id, throughput, pdata[19], d_hash[thr_id]);
if (work->nonces[0] != UINT32_MAX)
{
const uint32_t Htarg = ptarget[7];
uint32_t _ALIGN(64) vhash[8];
be32enc(&endiandata[19], work->nonces[0]);
bmw_hash(vhash, endiandata);
if (vhash[7] <= Htarg && fulltest(vhash, ptarget)) {
work->valid_nonces = 1;
work_set_target_ratio(work, vhash);
work->nonces[1] = cuda_check_hash_suppl(thr_id, throughput, pdata[19], d_hash[thr_id], 1);
if (work->nonces[1] != 0) {
be32enc(&endiandata[19], work->nonces[1]);
bmw_hash(vhash, endiandata);
bn_set_target_ratio(work, vhash, 1);
work->valid_nonces++;
pdata[19] = max(work->nonces[0], work->nonces[1]) + 1;
} else {
pdata[19] = work->nonces[0] + 1; // cursor
}
return work->valid_nonces;
}
else if (vhash[7] > Htarg) {
gpulog(LOG_WARNING, thr_id, "result for %08x does not validate on CPU!", work->nonces[0]);
pdata[19] = work->nonces[0] + 1;
continue;
}
}
if ((uint64_t) throughput + pdata[19] >= max_nonce) {
pdata[19] = max_nonce;
break;
}
pdata[19] += throughput;
} while (!work_restart[thr_id].restart);
*hashes_done = pdata[19] - first_nonce;
return 0;
}
// cleanup
extern "C" void free_bmw(int thr_id)
{
if (!init[thr_id])
return;
cudaThreadSynchronize();
cudaFree(d_hash[thr_id]);
bmw256_midstate_free(thr_id);
cuda_check_cpu_free(thr_id);
cudaDeviceSynchronize();
init[thr_id] = false;
}