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sgminer/ocl.c

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/*
* Copyright 2011-2012 Con Kolivas
*
* 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 <signal.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <limits.h>
#include <sys/types.h>
#ifdef WIN32
#include <winsock2.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#endif
#include <time.h>
#include <sys/time.h>
#include <pthread.h>
#include <sys/stat.h>
#include <unistd.h>
#include "findnonce.h"
#include "ocl.h"
/* FIXME: only here for global config vars, replace with configuration.h
* or similar as soon as config is in a struct instead of littered all
* over the global namespace.
*/
#include "miner.h"
int opt_platform_id = -1;
char *file_contents(const char *filename, int *length)
{
char *fullpath = (char *)alloca(PATH_MAX);
void *buffer;
FILE *f;
/* Try in the optional kernel path first, defaults to PREFIX */
strcpy(fullpath, opt_kernel_path);
strcat(fullpath, filename);
f = fopen(fullpath, "rb");
if (!f) {
/* Then try from the path sgminer was called */
strcpy(fullpath, sgminer_path);
strcat(fullpath, filename);
f = fopen(fullpath, "rb");
}
if (!f) {
/* Then from `pwd`/kernel/ */
strcpy(fullpath, sgminer_path);
strcat(fullpath, "kernel/");
strcat(fullpath, filename);
f = fopen(fullpath, "rb");
}
/* Finally try opening it directly */
if (!f)
f = fopen(filename, "rb");
if (!f) {
applog(LOG_ERR, "Unable to open %s or %s for reading",
filename, fullpath);
return NULL;
}
fseek(f, 0, SEEK_END);
*length = ftell(f);
fseek(f, 0, SEEK_SET);
buffer = malloc(*length+1);
*length = fread(buffer, 1, *length, f);
fclose(f);
((char*)buffer)[*length] = '\0';
return (char*)buffer;
}
int clDevicesNum(void) {
cl_int status;
char pbuff[256];
cl_uint numDevices;
cl_uint numPlatforms;
int most_devices = -1;
cl_platform_id *platforms;
cl_platform_id platform = NULL;
unsigned int i, mdplatform = 0;
status = clGetPlatformIDs(0, NULL, &numPlatforms);
/* If this fails, assume no GPUs. */
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: clGetPlatformsIDs failed (no OpenCL SDK installed?)", status);
return -1;
}
if (numPlatforms == 0) {
applog(LOG_ERR, "clGetPlatformsIDs returned no platforms (no OpenCL SDK installed?)");
return -1;
}
platforms = (cl_platform_id *)alloca(numPlatforms*sizeof(cl_platform_id));
status = clGetPlatformIDs(numPlatforms, platforms, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Getting Platform Ids. (clGetPlatformsIDs)", status);
return -1;
}
for (i = 0; i < numPlatforms; i++) {
if (opt_platform_id >= 0 && (int)i != opt_platform_id)
continue;
status = clGetPlatformInfo( platforms[i], CL_PLATFORM_VENDOR, sizeof(pbuff), pbuff, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Getting Platform Info. (clGetPlatformInfo)", status);
return -1;
}
platform = platforms[i];
applog(LOG_INFO, "CL Platform %d vendor: %s", i, pbuff);
status = clGetPlatformInfo(platform, CL_PLATFORM_NAME, sizeof(pbuff), pbuff, NULL);
if (status == CL_SUCCESS)
applog(LOG_INFO, "CL Platform %d name: %s", i, pbuff);
status = clGetPlatformInfo(platform, CL_PLATFORM_VERSION, sizeof(pbuff), pbuff, NULL);
if (status == CL_SUCCESS)
applog(LOG_INFO, "CL Platform %d version: %s", i, pbuff);
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 0, NULL, &numDevices);
if (status != CL_SUCCESS) {
applog(LOG_INFO, "Error %d: Getting Device IDs (num)", status);
continue;
}
applog(LOG_INFO, "Platform %d devices: %d", i, numDevices);
if ((int)numDevices > most_devices) {
most_devices = numDevices;
mdplatform = i;
}
if (numDevices) {
unsigned int j;
cl_device_id *devices = (cl_device_id *)malloc(numDevices*sizeof(cl_device_id));
clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, numDevices, devices, NULL);
for (j = 0; j < numDevices; j++) {
clGetDeviceInfo(devices[j], CL_DEVICE_NAME, sizeof(pbuff), pbuff, NULL);
applog(LOG_INFO, "\t%i\t%s", j, pbuff);
}
free(devices);
}
}
if (opt_platform_id < 0)
opt_platform_id = mdplatform;;
return most_devices;
}
static int advance(char **area, unsigned *remaining, const char *marker)
{
char *find = (char *)memmem(*area, *remaining, (void *)marker, strlen(marker));
if (!find) {
applog(LOG_DEBUG, "Marker \"%s\" not found", marker);
return 0;
}
*remaining -= find - *area;
*area = find;
return 1;
}
#define OP3_INST_BFE_UINT 4ULL
#define OP3_INST_BFE_INT 5ULL
#define OP3_INST_BFI_INT 6ULL
#define OP3_INST_BIT_ALIGN_INT 12ULL
#define OP3_INST_BYTE_ALIGN_INT 13ULL
void patch_opcodes(char *w, unsigned remaining)
{
uint64_t *opcode = (uint64_t *)w;
int patched = 0;
int count_bfe_int = 0;
int count_bfe_uint = 0;
int count_byte_align = 0;
while (42) {
int clamp = (*opcode >> (32 + 31)) & 0x1;
int dest_rel = (*opcode >> (32 + 28)) & 0x1;
int alu_inst = (*opcode >> (32 + 13)) & 0x1f;
int s2_neg = (*opcode >> (32 + 12)) & 0x1;
int s2_rel = (*opcode >> (32 + 9)) & 0x1;
int pred_sel = (*opcode >> 29) & 0x3;
if (!clamp && !dest_rel && !s2_neg && !s2_rel && !pred_sel) {
if (alu_inst == OP3_INST_BFE_INT) {
count_bfe_int++;
} else if (alu_inst == OP3_INST_BFE_UINT) {
count_bfe_uint++;
} else if (alu_inst == OP3_INST_BYTE_ALIGN_INT) {
count_byte_align++;
// patch this instruction to BFI_INT
*opcode &= 0xfffc1fffffffffffULL;
*opcode |= OP3_INST_BFI_INT << (32 + 13);
patched++;
}
}
if (remaining <= 8)
break;
opcode++;
remaining -= 8;
}
applog(LOG_DEBUG, "Potential OP3 instructions identified: "
"%i BFE_INT, %i BFE_UINT, %i BYTE_ALIGN",
count_bfe_int, count_bfe_uint, count_byte_align);
applog(LOG_DEBUG, "Patched a total of %i BFI_INT instructions", patched);
}
_clState *initCl(unsigned int gpu, char *name, size_t nameSize)
{
_clState *clState = (_clState *)calloc(1, sizeof(_clState));
bool patchbfi = false, prog_built = false;
struct cgpu_info *cgpu = &gpus[gpu];
cl_platform_id platform = NULL;
char pbuff[256], vbuff[255];
cl_platform_id* platforms;
cl_uint preferred_vwidth;
cl_device_id *devices;
cl_uint numPlatforms;
cl_uint numDevices;
cl_int status;
status = clGetPlatformIDs(0, NULL, &numPlatforms);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Getting Platforms. (clGetPlatformsIDs)", status);
return NULL;
}
platforms = (cl_platform_id *)alloca(numPlatforms*sizeof(cl_platform_id));
status = clGetPlatformIDs(numPlatforms, platforms, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Getting Platform Ids. (clGetPlatformsIDs)", status);
return NULL;
}
if (opt_platform_id >= (int)numPlatforms) {
applog(LOG_ERR, "Specified platform that does not exist");
return NULL;
}
status = clGetPlatformInfo(platforms[opt_platform_id], CL_PLATFORM_VENDOR, sizeof(pbuff), pbuff, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Getting Platform Info. (clGetPlatformInfo)", status);
return NULL;
}
platform = platforms[opt_platform_id];
if (platform == NULL) {
perror("NULL platform found!\n");
return NULL;
}
applog(LOG_INFO, "CL Platform vendor: %s", pbuff);
status = clGetPlatformInfo(platform, CL_PLATFORM_NAME, sizeof(pbuff), pbuff, NULL);
if (status == CL_SUCCESS)
applog(LOG_INFO, "CL Platform name: %s", pbuff);
status = clGetPlatformInfo(platform, CL_PLATFORM_VERSION, sizeof(vbuff), vbuff, NULL);
if (status == CL_SUCCESS)
applog(LOG_INFO, "CL Platform version: %s", vbuff);
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 0, NULL, &numDevices);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Getting Device IDs (num)", status);
return NULL;
}
if (numDevices > 0 ) {
devices = (cl_device_id *)malloc(numDevices*sizeof(cl_device_id));
/* Now, get the device list data */
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, numDevices, devices, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Getting Device IDs (list)", status);
return NULL;
}
applog(LOG_INFO, "List of devices:");
unsigned int i;
for (i = 0; i < numDevices; i++) {
status = clGetDeviceInfo(devices[i], CL_DEVICE_NAME, sizeof(pbuff), pbuff, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Getting Device Info", status);
return NULL;
}
applog(LOG_INFO, "\t%i\t%s", i, pbuff);
}
if (gpu < numDevices) {
status = clGetDeviceInfo(devices[gpu], CL_DEVICE_NAME, sizeof(pbuff), pbuff, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Getting Device Info", status);
return NULL;
}
applog(LOG_INFO, "Selected %i: %s", gpu, pbuff);
strncpy(name, pbuff, nameSize);
} else {
applog(LOG_ERR, "Invalid GPU %i", gpu);
return NULL;
}
} else return NULL;
cl_context_properties cps[3] = { CL_CONTEXT_PLATFORM, (cl_context_properties)platform, 0 };
clState->context = clCreateContextFromType(cps, CL_DEVICE_TYPE_GPU, NULL, NULL, &status);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Creating Context. (clCreateContextFromType)", status);
return NULL;
}
/////////////////////////////////////////////////////////////////
// Create an OpenCL command queue
/////////////////////////////////////////////////////////////////
clState->commandQueue = clCreateCommandQueue(clState->context, devices[gpu],
CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE, &status);
if (status != CL_SUCCESS) /* Try again without OOE enable */
clState->commandQueue = clCreateCommandQueue(clState->context, devices[gpu], 0 , &status);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Creating Command Queue. (clCreateCommandQueue)", status);
return NULL;
}
/* Check for BFI INT support. Hopefully people don't mix devices with
* and without it! */
char * extensions = (char *)malloc(1024);
const char * camo = "cl_amd_media_ops";
char *find;
status = clGetDeviceInfo(devices[gpu], CL_DEVICE_EXTENSIONS, 1024, (void *)extensions, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Failed to clGetDeviceInfo when trying to get CL_DEVICE_EXTENSIONS", status);
return NULL;
}
find = strstr(extensions, camo);
if (find)
clState->hasBitAlign = true;
/* Check for OpenCL >= 1.0 support, needed for global offset parameter usage. */
char * devoclver = (char *)malloc(1024);
const char * ocl10 = "OpenCL 1.0";
const char * ocl11 = "OpenCL 1.1";
status = clGetDeviceInfo(devices[gpu], CL_DEVICE_VERSION, 1024, (void *)devoclver, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Failed to clGetDeviceInfo when trying to get CL_DEVICE_VERSION", status);
return NULL;
}
find = strstr(devoclver, ocl10);
if (!find) {
clState->hasOpenCL11plus = true;
find = strstr(devoclver, ocl11);
if (!find)
clState->hasOpenCL12plus = true;
}
status = clGetDeviceInfo(devices[gpu], CL_DEVICE_PREFERRED_VECTOR_WIDTH_INT, sizeof(cl_uint), (void *)&preferred_vwidth, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Failed to clGetDeviceInfo when trying to get CL_DEVICE_PREFERRED_VECTOR_WIDTH_INT", status);
return NULL;
}
applog(LOG_DEBUG, "Preferred vector width reported %d", preferred_vwidth);
status = clGetDeviceInfo(devices[gpu], CL_DEVICE_MAX_WORK_GROUP_SIZE, sizeof(size_t), (void *)&clState->max_work_size, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Failed to clGetDeviceInfo when trying to get CL_DEVICE_MAX_WORK_GROUP_SIZE", status);
return NULL;
}
applog(LOG_DEBUG, "Max work group size reported %d", (int)(clState->max_work_size));
size_t compute_units = 0;
status = clGetDeviceInfo(devices[gpu], CL_DEVICE_MAX_COMPUTE_UNITS, sizeof(size_t), (void *)&compute_units, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Failed to clGetDeviceInfo when trying to get CL_DEVICE_MAX_COMPUTE_UNITS", status);
return NULL;
}
// AMD architechture got 64 compute shaders per compute unit.
// Source: http://www.amd.com/us/Documents/GCN_Architecture_whitepaper.pdf
clState->compute_shaders = compute_units * 64;
applog(LOG_DEBUG, "Max shaders calculated %d", (int)(clState->compute_shaders));
status = clGetDeviceInfo(devices[gpu], CL_DEVICE_MAX_MEM_ALLOC_SIZE , sizeof(cl_ulong), (void *)&cgpu->max_alloc, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Failed to clGetDeviceInfo when trying to get CL_DEVICE_MAX_MEM_ALLOC_SIZE", status);
return NULL;
}
applog(LOG_DEBUG, "Max mem alloc size is %lu", (long unsigned int)(cgpu->max_alloc));
/* Create binary filename based on parameters passed to opencl
* compiler to ensure we only load a binary that matches what would
* have otherwise created. The filename is:
* name + kernelname +/- g(offset) + v + vectors + w + work_size + l + sizeof(long) + .bin
* For scrypt the filename is:
* name + kernelname + g + lg + lookup_gap + tc + thread_concurrency + w + work_size + l + sizeof(long) + .bin
*/
char binaryfilename[255];
char filename[255];
char strbuf[32];
if (cgpu->kernelname == NULL) {
applog(LOG_INFO, "No kernel specified, defaulting to ckolivas");
cgpu->kernelname = strdup("ckolivas");
}
sprintf(strbuf, "%s.cl", cgpu->kernelname);
strcpy(filename, strbuf);
strcpy(binaryfilename, cgpu->kernelname);
if ((strcmp(cgpu->kernelname, "zuikkis") == 0) && (cgpu->lookup_gap != 2)) {
applog(LOG_WARNING, "Kernel zuikkis only supports lookup-gap = 2, forcing.");
cgpu->lookup_gap = 2;
}
/* For some reason 2 vectors is still better even if the card says
* otherwise, and many cards lie about their max so use 256 as max
* unless explicitly set on the command line. Tahiti prefers 1 */
if (strstr(name, "Tahiti"))
preferred_vwidth = 1;
else if (preferred_vwidth > 2)
preferred_vwidth = 2;
/* All available kernels only support vector 1 */
cgpu->vwidth = 1;
/* Vectors are hard-set to 1 above. */
if (likely(cgpu->vwidth))
clState->vwidth = cgpu->vwidth;
else {
clState->vwidth = preferred_vwidth;
cgpu->vwidth = preferred_vwidth;
}
clState->goffset = true;
if (cgpu->work_size && cgpu->work_size <= clState->max_work_size)
clState->wsize = cgpu->work_size;
else
clState->wsize = 256;
if (!cgpu->opt_lg) {
applog(LOG_DEBUG, "GPU %d: selecting lookup gap of 2", gpu);
cgpu->lookup_gap = 2;
} else
cgpu->lookup_gap = cgpu->opt_lg;
if (!cgpu->opt_tc) {
unsigned int sixtyfours;
sixtyfours = cgpu->max_alloc / 131072 / 64 / (algorithm->n/1024) - 1;
cgpu->thread_concurrency = sixtyfours * 64;
if (cgpu->shaders && cgpu->thread_concurrency > cgpu->shaders) {
cgpu->thread_concurrency -= cgpu->thread_concurrency % cgpu->shaders;
if (cgpu->thread_concurrency > cgpu->shaders * 5)
cgpu->thread_concurrency = cgpu->shaders * 5;
}
applog(LOG_DEBUG, "GPU %d: selecting thread concurrency of %d", gpu, (int)(cgpu->thread_concurrency));
} else
cgpu->thread_concurrency = cgpu->opt_tc;
FILE *binaryfile;
size_t *binary_sizes;
char **binaries;
int pl;
char *source = file_contents(filename, &pl);
size_t sourceSize[] = {(size_t)pl};
cl_uint slot, cpnd;
slot = cpnd = 0;
if (!source)
return NULL;
binary_sizes = (size_t *)calloc(sizeof(size_t) * MAX_GPUDEVICES * 4, 1);
if (unlikely(!binary_sizes)) {
applog(LOG_ERR, "Unable to calloc binary_sizes");
return NULL;
}
binaries = (char **)calloc(sizeof(char *) * MAX_GPUDEVICES * 4, 1);
if (unlikely(!binaries)) {
applog(LOG_ERR, "Unable to calloc binaries");
return NULL;
}
strcat(binaryfilename, name);
if (clState->goffset)
strcat(binaryfilename, "g");
sprintf(strbuf, "lg%utc%unf%u", cgpu->lookup_gap, (unsigned int)cgpu->thread_concurrency, algorithm->nfactor);
strcat(binaryfilename, strbuf);
sprintf(strbuf, "w%d", (int)clState->wsize);
strcat(binaryfilename, strbuf);
sprintf(strbuf, "l%d", (int)sizeof(long));
strcat(binaryfilename, strbuf);
strcat(binaryfilename, ".bin");
binaryfile = fopen(binaryfilename, "rb");
if (!binaryfile) {
applog(LOG_DEBUG, "No binary found, generating from source");
} else {
struct stat binary_stat;
if (unlikely(stat(binaryfilename, &binary_stat))) {
applog(LOG_DEBUG, "Unable to stat binary, generating from source");
fclose(binaryfile);
goto build;
}
if (!binary_stat.st_size)
goto build;
binary_sizes[slot] = binary_stat.st_size;
binaries[slot] = (char *)calloc(binary_sizes[slot], 1);
if (unlikely(!binaries[slot])) {
applog(LOG_ERR, "Unable to calloc binaries");
fclose(binaryfile);
return NULL;
}
if (fread(binaries[slot], 1, binary_sizes[slot], binaryfile) != binary_sizes[slot]) {
applog(LOG_ERR, "Unable to fread binaries");
fclose(binaryfile);
free(binaries[slot]);
goto build;
}
clState->program = clCreateProgramWithBinary(clState->context, 1, &devices[gpu], &binary_sizes[slot], (const unsigned char **)binaries, &status, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Loading Binary into cl_program (clCreateProgramWithBinary)", status);
fclose(binaryfile);
free(binaries[slot]);
goto build;
}
fclose(binaryfile);
applog(LOG_DEBUG, "Loaded binary image %s", binaryfilename);
goto built;
}
/////////////////////////////////////////////////////////////////
// Load CL file, build CL program object, create CL kernel object
/////////////////////////////////////////////////////////////////
build:
applog(LOG_NOTICE, "Building binary %s", binaryfilename);
clState->program = clCreateProgramWithSource(clState->context, 1, (const char **)&source, sourceSize, &status);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Loading Binary into cl_program (clCreateProgramWithSource)", status);
return NULL;
}
/* create a cl program executable for all the devices specified */
char *CompilerOptions = (char *)calloc(1, 256);
sprintf(CompilerOptions, "-D LOOKUP_GAP=%d -D CONCURRENT_THREADS=%d -D WORKSIZE=%d -D NFACTOR=%d",
cgpu->lookup_gap, (unsigned int)cgpu->thread_concurrency, (int)clState->wsize, (unsigned int)algorithm->nfactor);
applog(LOG_DEBUG, "Setting worksize to %d", (int)(clState->wsize));
if (clState->vwidth > 1)
applog(LOG_DEBUG, "Patched source to suit %d vectors", clState->vwidth);
if (clState->hasBitAlign) {
strcat(CompilerOptions, " -D BITALIGN");
applog(LOG_DEBUG, "cl_amd_media_ops found, setting BITALIGN");
if (!clState->hasOpenCL12plus &&
(strstr(name, "Cedar") ||
strstr(name, "Redwood") ||
strstr(name, "Juniper") ||
strstr(name, "Cypress" ) ||
strstr(name, "Hemlock" ) ||
strstr(name, "Caicos" ) ||
strstr(name, "Turks" ) ||
strstr(name, "Barts" ) ||
strstr(name, "Cayman" ) ||
strstr(name, "Antilles" ) ||
strstr(name, "Wrestler" ) ||
strstr(name, "Zacate" ) ||
strstr(name, "WinterPark" )))
patchbfi = true;
} else
applog(LOG_DEBUG, "cl_amd_media_ops not found, will not set BITALIGN");
if (patchbfi) {
strcat(CompilerOptions, " -D BFI_INT");
applog(LOG_DEBUG, "BFI_INT patch requiring device found, patched source with BFI_INT");
} else
applog(LOG_DEBUG, "BFI_INT patch requiring device not found, will not BFI_INT patch");
if (clState->goffset)
strcat(CompilerOptions, " -D GOFFSET");
if (!clState->hasOpenCL11plus)
strcat(CompilerOptions, " -D OCL1");
applog(LOG_DEBUG, "CompilerOptions: %s", CompilerOptions);
status = clBuildProgram(clState->program, 1, &devices[gpu], CompilerOptions , NULL, NULL);
free(CompilerOptions);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Building Program (clBuildProgram)", status);
size_t logSize;
status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, 0, NULL, &logSize);
char *log = (char *)malloc(logSize);
status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, logSize, log, NULL);
applog(LOG_ERR, "%s", log);
return NULL;
}
prog_built = true;
#ifdef __APPLE__
/* OSX OpenCL breaks reading off binaries with >1 GPU so always build
* from source. */
goto built;
#endif
status = clGetProgramInfo(clState->program, CL_PROGRAM_NUM_DEVICES, sizeof(cl_uint), &cpnd, NULL);
if (unlikely(status != CL_SUCCESS)) {
applog(LOG_ERR, "Error %d: Getting program info CL_PROGRAM_NUM_DEVICES. (clGetProgramInfo)", status);
return NULL;
}
status = clGetProgramInfo(clState->program, CL_PROGRAM_BINARY_SIZES, sizeof(size_t)*cpnd, binary_sizes, NULL);
if (unlikely(status != CL_SUCCESS)) {
applog(LOG_ERR, "Error %d: Getting program info CL_PROGRAM_BINARY_SIZES. (clGetProgramInfo)", status);
return NULL;
}
/* The actual compiled binary ends up in a RANDOM slot! Grr, so we have
* to iterate over all the binary slots and find where the real program
* is. What the heck is this!? */
for (slot = 0; slot < cpnd; slot++)
if (binary_sizes[slot])
break;
/* copy over all of the generated binaries. */
applog(LOG_DEBUG, "Binary size for gpu %d found in binary slot %d: %d", gpu, slot, (int)(binary_sizes[slot]));
if (!binary_sizes[slot]) {
applog(LOG_ERR, "OpenCL compiler generated a zero sized binary, FAIL!");
return NULL;
}
binaries[slot] = (char *)calloc(sizeof(char)* binary_sizes[slot], 1);
status = clGetProgramInfo(clState->program, CL_PROGRAM_BINARIES, sizeof(char *) * cpnd, binaries, NULL );
if (unlikely(status != CL_SUCCESS)) {
applog(LOG_ERR, "Error %d: Getting program info. CL_PROGRAM_BINARIES (clGetProgramInfo)", status);
return NULL;
}
/* Patch the kernel if the hardware supports BFI_INT but it needs to
* be hacked in */
if (patchbfi) {
unsigned remaining = binary_sizes[slot];
char *w = binaries[slot];
unsigned int start, length;
/* Find 2nd incidence of .text, and copy the program's
* position and length at a fixed offset from that. Then go
* back and find the 2nd incidence of \x7ELF (rewind by one
* from ELF) and then patch the opcocdes */
if (!advance(&w, &remaining, ".text"))
goto build;
w++; remaining--;
if (!advance(&w, &remaining, ".text")) {
/* 32 bit builds only one ELF */
w--; remaining++;
}
memcpy(&start, w + 285, 4);
memcpy(&length, w + 289, 4);
w = binaries[slot]; remaining = binary_sizes[slot];
if (!advance(&w, &remaining, "ELF"))
goto build;
w++; remaining--;
if (!advance(&w, &remaining, "ELF")) {
/* 32 bit builds only one ELF */
w--; remaining++;
}
w--; remaining++;
w += start; remaining -= start;
applog(LOG_DEBUG, "At %p (%u rem. bytes), to begin patching",
w, remaining);
patch_opcodes(w, length);
status = clReleaseProgram(clState->program);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Releasing program. (clReleaseProgram)", status);
return NULL;
}
clState->program = clCreateProgramWithBinary(clState->context, 1, &devices[gpu], &binary_sizes[slot], (const unsigned char **)&binaries[slot], &status, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Loading Binary into cl_program (clCreateProgramWithBinary)", status);
return NULL;
}
/* Program needs to be rebuilt */
prog_built = false;
}
free(source);
/* Save the binary to be loaded next time */
binaryfile = fopen(binaryfilename, "wb");
if (!binaryfile) {
/* Not fatal, just means we build it again next time */
applog(LOG_DEBUG, "Unable to create file %s", binaryfilename);
} else {
if (unlikely(fwrite(binaries[slot], 1, binary_sizes[slot], binaryfile) != binary_sizes[slot])) {
applog(LOG_ERR, "Unable to fwrite to binaryfile");
return NULL;
}
fclose(binaryfile);
}
built:
if (binaries[slot])
free(binaries[slot]);
free(binaries);
free(binary_sizes);
applog(LOG_NOTICE, "Initialising kernel %s with%s bitalign, %spatched BFI",
filename, clState->hasBitAlign ? "" : "out", patchbfi ? "" : "un");
if (!prog_built) {
/* create a cl program executable for all the devices specified */
status = clBuildProgram(clState->program, 1, &devices[gpu], NULL, NULL, NULL);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Building Program (clBuildProgram)", status);
size_t logSize;
status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, 0, NULL, &logSize);
char *log = (char *)malloc(logSize);
status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, logSize, log, NULL);
applog(LOG_ERR, "%s", log);
return NULL;
}
}
/* get a kernel object handle for a kernel with the given name */
clState->kernel = clCreateKernel(clState->program, "search", &status);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: Creating Kernel from program. (clCreateKernel)", status);
return NULL;
}
size_t ipt = (algorithm->n / cgpu->lookup_gap +
(algorithm->n % cgpu->lookup_gap > 0));
size_t bufsize = 128 * ipt * cgpu->thread_concurrency;
/* Use the max alloc value which has been rounded to a power of
* 2 greater >= required amount earlier */
if (bufsize > cgpu->max_alloc) {
applog(LOG_WARNING, "Maximum buffer memory device %d supports says %lu",
gpu, (unsigned long)(cgpu->max_alloc));
applog(LOG_WARNING, "Your scrypt settings come to %lu", (unsigned long)bufsize);
}
applog(LOG_DEBUG, "Creating scrypt buffer sized %lu", (unsigned long)bufsize);
clState->padbufsize = bufsize;
/* This buffer is weird and might work to some degree even if
* the create buffer call has apparently failed, so check if we
* get anything back before we call it a failure. */
clState->padbuffer8 = NULL;
clState->padbuffer8 = clCreateBuffer(clState->context, CL_MEM_READ_WRITE, bufsize, NULL, &status);
if (status != CL_SUCCESS && !clState->padbuffer8) {
applog(LOG_ERR, "Error %d: clCreateBuffer (padbuffer8), decrease TC or increase LG", status);
return NULL;
}
clState->CLbuffer0 = clCreateBuffer(clState->context, CL_MEM_READ_ONLY, 128, NULL, &status);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: clCreateBuffer (CLbuffer0)", status);
return NULL;
}
clState->outputBuffer = clCreateBuffer(clState->context, CL_MEM_WRITE_ONLY, BUFFERSIZE, NULL, &status);
if (status != CL_SUCCESS) {
applog(LOG_ERR, "Error %d: clCreateBuffer (outputBuffer)", status);
return NULL;
}
return clState;
}