bfgminer/driver-opencl.c

/*
 * Copyright 2011-2012 Con Kolivas
 * Copyright 2011-2013 Luke Dashjr
 * Copyright 2010 Jeff Garzik
 *
 * 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"

#ifdef HAVE_CURSES
// Must be before stdbool, since pdcurses typedefs bool :/
#include <curses.h>
#endif

#ifndef WIN32
#include <dlfcn.h>
#else
#include <windows.h>
#endif

#include <string.h>
#include <stdbool.h>
#include <stdint.h>

#include <sys/types.h>

#ifndef WIN32
#include <sys/resource.h>
#endif

#define OMIT_OPENCL_API

#include "compat.h"
#include "miner.h"
#include "deviceapi.h"
#include "driver-opencl.h"
#include "findnonce.h"
#include "ocl.h"
#include "adl.h"
#include "util.h"

/* TODO: cleanup externals ********************/


#ifdef HAVE_OPENCL
/* Platform API */
CL_API_ENTRY cl_int CL_API_CALL
(*clGetPlatformIDs)(cl_uint          /* num_entries */,
                 cl_platform_id * /* platforms */,
                 cl_uint *        /* num_platforms */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clGetPlatformInfo)(cl_platform_id   /* platform */,
                  cl_platform_info /* param_name */,
                  size_t           /* param_value_size */,
                  void *           /* param_value */,
                  size_t *         /* param_value_size_ret */) CL_API_SUFFIX__VERSION_1_0;

/* Device APIs */
CL_API_ENTRY cl_int CL_API_CALL
(*clGetDeviceIDs)(cl_platform_id   /* platform */,
               cl_device_type   /* device_type */,
               cl_uint          /* num_entries */,
               cl_device_id *   /* devices */,
               cl_uint *        /* num_devices */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clGetDeviceInfo)(cl_device_id    /* device */,
                cl_device_info  /* param_name */,
                size_t          /* param_value_size */,
                void *          /* param_value */,
                size_t *        /* param_value_size_ret */) CL_API_SUFFIX__VERSION_1_0;

/* Context APIs  */
CL_API_ENTRY cl_context CL_API_CALL
(*clCreateContextFromType)(const cl_context_properties * /* properties */,
                        cl_device_type          /* device_type */,
                        void (CL_CALLBACK *     /* pfn_notify*/ )(const char *, const void *, size_t, void *),
                        void *                  /* user_data */,
                        cl_int *                /* errcode_ret */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clReleaseContext)(cl_context /* context */) CL_API_SUFFIX__VERSION_1_0;

/* Command Queue APIs */
CL_API_ENTRY cl_command_queue CL_API_CALL
(*clCreateCommandQueue)(cl_context                     /* context */,
                     cl_device_id                   /* device */,
                     cl_command_queue_properties    /* properties */,
                     cl_int *                       /* errcode_ret */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clReleaseCommandQueue)(cl_command_queue /* command_queue */) CL_API_SUFFIX__VERSION_1_0;

/* Memory Object APIs */
CL_API_ENTRY cl_mem CL_API_CALL
(*clCreateBuffer)(cl_context   /* context */,
               cl_mem_flags /* flags */,
               size_t       /* size */,
               void *       /* host_ptr */,
               cl_int *     /* errcode_ret */) CL_API_SUFFIX__VERSION_1_0;

/* Program Object APIs  */
CL_API_ENTRY cl_program CL_API_CALL
(*clCreateProgramWithSource)(cl_context        /* context */,
                          cl_uint           /* count */,
                          const char **     /* strings */,
                          const size_t *    /* lengths */,
                          cl_int *          /* errcode_ret */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_program CL_API_CALL
(*clCreateProgramWithBinary)(cl_context                     /* context */,
                          cl_uint                        /* num_devices */,
                          const cl_device_id *           /* device_list */,
                          const size_t *                 /* lengths */,
                          const unsigned char **         /* binaries */,
                          cl_int *                       /* binary_status */,
                          cl_int *                       /* errcode_ret */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clReleaseProgram)(cl_program /* program */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clBuildProgram)(cl_program           /* program */,
               cl_uint              /* num_devices */,
               const cl_device_id * /* device_list */,
               const char *         /* options */,
               void (CL_CALLBACK *  /* pfn_notify */)(cl_program /* program */, void * /* user_data */),
               void *               /* user_data */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clGetProgramInfo)(cl_program         /* program */,
                 cl_program_info    /* param_name */,
                 size_t             /* param_value_size */,
                 void *             /* param_value */,
                 size_t *           /* param_value_size_ret */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clGetProgramBuildInfo)(cl_program            /* program */,
                      cl_device_id          /* device */,
                      cl_program_build_info /* param_name */,
                      size_t                /* param_value_size */,
                      void *                /* param_value */,
                      size_t *              /* param_value_size_ret */) CL_API_SUFFIX__VERSION_1_0;

/* Kernel Object APIs */
CL_API_ENTRY cl_kernel CL_API_CALL
(*clCreateKernel)(cl_program      /* program */,
               const char *    /* kernel_name */,
               cl_int *        /* errcode_ret */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clReleaseKernel)(cl_kernel   /* kernel */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clSetKernelArg)(cl_kernel    /* kernel */,
               cl_uint      /* arg_index */,
               size_t       /* arg_size */,
               const void * /* arg_value */) CL_API_SUFFIX__VERSION_1_0;

/* Flush and Finish APIs */
CL_API_ENTRY cl_int CL_API_CALL
(*clFinish)(cl_command_queue /* command_queue */) CL_API_SUFFIX__VERSION_1_0;

/* Enqueued Commands APIs */
CL_API_ENTRY cl_int CL_API_CALL
(*clEnqueueReadBuffer)(cl_command_queue    /* command_queue */,
                    cl_mem              /* buffer */,
                    cl_bool             /* blocking_read */,
                    size_t              /* offset */,
                    size_t              /* size */,
                    void *              /* ptr */,
                    cl_uint             /* num_events_in_wait_list */,
                    const cl_event *    /* event_wait_list */,
                    cl_event *          /* event */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clEnqueueWriteBuffer)(cl_command_queue   /* command_queue */,
                     cl_mem             /* buffer */,
                     cl_bool            /* blocking_write */,
                     size_t             /* offset */,
                     size_t             /* size */,
                     const void *       /* ptr */,
                     cl_uint            /* num_events_in_wait_list */,
                     const cl_event *   /* event_wait_list */,
                     cl_event *         /* event */) CL_API_SUFFIX__VERSION_1_0;

CL_API_ENTRY cl_int CL_API_CALL
(*clEnqueueNDRangeKernel)(cl_command_queue /* command_queue */,
                       cl_kernel        /* kernel */,
                       cl_uint          /* work_dim */,
                       const size_t *   /* global_work_offset */,
                       const size_t *   /* global_work_size */,
                       const size_t *   /* local_work_size */,
                       cl_uint          /* num_events_in_wait_list */,
                       const cl_event * /* event_wait_list */,
                       cl_event *       /* event */) CL_API_SUFFIX__VERSION_1_0;

#ifdef WIN32
#define dlsym (void*)GetProcAddress
#define dlclose FreeLibrary
#endif

#define LOAD_OCL_SYM(sym)  do { \
	if (!(sym = dlsym(cl, #sym))) {  \
		applog(LOG_ERR, "Failed to load OpenCL symbol " #sym ", no GPUs usable");  \
		dlclose(cl);  \
		return false;  \
	}  \
} while(0)

static bool
load_opencl_symbols() {
#if defined(__APPLE__)
	void *cl = dlopen("/System/Library/Frameworks/OpenCL.framework/Versions/Current/OpenCL", RTLD_LAZY);
#elif !defined(WIN32)
	void *cl = dlopen("libOpenCL.so", RTLD_LAZY);
#else
	HMODULE cl = LoadLibrary("OpenCL.dll");
#endif
	if (!cl)
	{
		applog(LOG_ERR, "Failed to load OpenCL library, no GPUs usable");
		return false;
	}
	
	LOAD_OCL_SYM(clGetPlatformIDs);
	LOAD_OCL_SYM(clGetPlatformInfo);
	LOAD_OCL_SYM(clGetDeviceIDs);
	LOAD_OCL_SYM(clGetDeviceInfo);
	LOAD_OCL_SYM(clCreateContextFromType);
	LOAD_OCL_SYM(clReleaseContext);
	LOAD_OCL_SYM(clCreateCommandQueue);
	LOAD_OCL_SYM(clReleaseCommandQueue);
	LOAD_OCL_SYM(clCreateBuffer);
	LOAD_OCL_SYM(clCreateProgramWithSource);
	LOAD_OCL_SYM(clCreateProgramWithBinary);
	LOAD_OCL_SYM(clReleaseProgram);
	LOAD_OCL_SYM(clBuildProgram);
	LOAD_OCL_SYM(clGetProgramInfo);
	LOAD_OCL_SYM(clGetProgramBuildInfo);
	LOAD_OCL_SYM(clCreateKernel);
	LOAD_OCL_SYM(clReleaseKernel);
	LOAD_OCL_SYM(clSetKernelArg);
	LOAD_OCL_SYM(clFinish);
	LOAD_OCL_SYM(clEnqueueReadBuffer);
	LOAD_OCL_SYM(clEnqueueWriteBuffer);
	LOAD_OCL_SYM(clEnqueueNDRangeKernel);
	
	return true;
}
#endif


#ifdef HAVE_CURSES
extern WINDOW *mainwin, *statuswin, *logwin;
extern void enable_curses(void);
#endif

extern int mining_threads;
extern int opt_g_threads;
extern bool ping;
extern bool opt_loginput;
extern char *opt_kernel_path;
extern int gpur_thr_id;
extern bool opt_noadl;
extern bool have_opencl;



extern void *miner_thread(void *userdata);
extern int dev_from_id(int thr_id);
extern void decay_time(double *f, double fadd);


/**********************************************/

#ifdef HAVE_ADL
extern float gpu_temp(int gpu);
extern int gpu_fanspeed(int gpu);
extern int gpu_fanpercent(int gpu);
#endif


#ifdef HAVE_SENSORS
#include <sensors/sensors.h>

struct opencl_device_data {
	const sensors_chip_name *sensor;
};
#endif


static
const char *_set_list(char * const arg, const char * const emsg, bool (*set_func)(struct cgpu_info *, const char *))
{
	int i, device = 0;
	char *nextptr, buf[0x10];

	nextptr = strtok(arg, ",");
	if (nextptr == NULL)
		return emsg;
	if (!set_func(&gpus[device++], nextptr))
		return emsg;
	snprintf(buf, sizeof(buf), "%s", nextptr);

	while ((nextptr = strtok(NULL, ",")) != NULL)
		if (!set_func(&gpus[device++], nextptr))
			return emsg;
	if (device == 1) {
		for (i = device; i < MAX_GPUDEVICES; i++)
			set_func(&gpus[i], buf);
	}

	return NULL;
}

#define _SET_INT_LIST(PNAME, VCHECK, FIELD)  \
static  \
bool _set_ ## PNAME (struct cgpu_info * const cgpu, const char * const _val)  \
{  \
	const int v = atoi(_val);  \
	if (!(VCHECK))  \
		return false;  \
	cgpu->FIELD = v;  \
	return true;  \
}  \
const char *set_ ## PNAME(char *arg)  \
{  \
	return _set_list(arg, "Invalid value passed to " #PNAME, _set_ ## PNAME);  \
}  \
// END OF _SET_INT_LIST


#ifdef HAVE_OPENCL
_SET_INT_LIST(vector  , (v == 1 || v == 2 || v == 4), vwidth   )
_SET_INT_LIST(worksize, (v >= 1 && v <= 9999)       , work_size)

#ifdef USE_SCRYPT
_SET_INT_LIST(shaders           , true, shaders)
_SET_INT_LIST(lookup_gap        , true, opt_lg )
_SET_INT_LIST(thread_concurrency, true, opt_tc )
#endif

static
enum cl_kernels select_kernel(const char * const arg)
{
	if (!strcmp(arg, "diablo"))
		return KL_DIABLO;
	if (!strcmp(arg, "diakgcn"))
		return KL_DIAKGCN;
	if (!strcmp(arg, "poclbm"))
		return KL_POCLBM;
	if (!strcmp(arg, "phatk"))
		return KL_PHATK;
#ifdef USE_SCRYPT
	if (!strcmp(arg, "scrypt"))
		return KL_SCRYPT;
#endif
	return KL_NONE;
}

static
bool _set_kernel(struct cgpu_info * const cgpu, const char * const _val)
{
	const enum cl_kernels kern = select_kernel(_val);
	if (kern == KL_NONE)
		return false;
	cgpu->kernel = kern;
	return true;
}
const char *set_kernel(char *arg)
{
	if (opt_scrypt)
		return "Cannot specify a kernel with scrypt";
	return _set_list(arg, "Invalid value passed to set_kernel", _set_kernel);
}
#endif

#ifdef HAVE_ADL
/* This function allows us to map an adl device to an opencl device for when
 * simple enumeration has failed to match them. */
char *set_gpu_map(char *arg)
{
	int val1 = 0, val2 = 0;
	char *nextptr;

	nextptr = strtok(arg, ",");
	if (nextptr == NULL)
		return "Invalid parameters for set gpu map";
	if (sscanf(arg, "%d:%d", &val1, &val2) != 2)
		return "Invalid description for map pair";
	if (val1 < 0 || val1 > MAX_GPUDEVICES || val2 < 0 || val2 > MAX_GPUDEVICES)
		return "Invalid value passed to set_gpu_map";

	gpus[val1].virtual_adl = val2;
	gpus[val1].mapped = true;

	while ((nextptr = strtok(NULL, ",")) != NULL) {
		if (sscanf(nextptr, "%d:%d", &val1, &val2) != 2)
			return "Invalid description for map pair";
		if (val1 < 0 || val1 > MAX_GPUDEVICES || val2 < 0 || val2 > MAX_GPUDEVICES)
			return "Invalid value passed to set_gpu_map";
		gpus[val1].virtual_adl = val2;
		gpus[val1].mapped = true;
	}

	return NULL;
}

static
bool _set_gpu_engine(struct cgpu_info * const cgpu, const char * const _val)
{
	int val1, val2;
	get_intrange(_val, &val1, &val2);
	if (val1 < 0 || val1 > 9999 || val2 < 0 || val2 > 9999)
		return false;
	cgpu->min_engine = val1;
	cgpu->gpu_engine = val2;
	return true;
}
const char *set_gpu_engine(char *arg)
{
	return _set_list(arg, "Invalid value passed to set_gpu_engine", _set_gpu_engine);
}

static
bool _set_gpu_fan(struct cgpu_info * const cgpu, const char * const _val)
{
	int val1, val2;
	get_intrange(_val, &val1, &val2);
	if (val1 < 0 || val1 > 100 || val2 < 0 || val2 > 100)
		return false;
	cgpu->min_fan = val1;
	cgpu->gpu_fan = val2;
	return true;
}
const char *set_gpu_fan(char *arg)
{
	return _set_list(arg, "Invalid value passed to set_gpu_fan", _set_gpu_fan);
}

_SET_INT_LIST(gpu_memclock , (v >=     1 && v <  9999), gpu_memclock )
_SET_INT_LIST(gpu_memdiff  , (v >= -9999 && v <= 9999), gpu_memdiff  )
_SET_INT_LIST(gpu_powertune, (v >=   -99 && v <=   99), gpu_powertune)
_SET_INT_LIST(gpu_vddc     , (v >=     0 && v <  9999), gpu_vddc     )
_SET_INT_LIST(temp_overheat, (v >=     0 && v <   200), adl.overtemp )
#endif

#ifdef HAVE_OPENCL
static
bool _set_intensity(struct cgpu_info * const cgpu, const char * const _val)
{
	if (!strncasecmp(_val, "d", 1))
		cgpu->dynamic = true;
	else
	{
		const int v = atoi(_val);
		if (v < MIN_INTENSITY || v > MAX_GPU_INTENSITY)
			return false;
		cgpu->dynamic = false;
		cgpu->intensity = v;
	}
	return true;
}
const char *set_intensity(char *arg)
{
	return _set_list(arg, "Invalid value passed to intensity", _set_intensity);
}
#endif


#ifdef HAVE_OPENCL
BFG_REGISTER_DRIVER(opencl_api)

char *print_ndevs_and_exit(int *ndevs)
{
	opt_log_output = true;
	opencl_api.drv_detect();
	clear_adl(*ndevs);
	applog(LOG_INFO, "%i GPU devices max detected", *ndevs);
	exit(*ndevs);
}
#endif


struct cgpu_info gpus[MAX_GPUDEVICES]; /* Maximum number apparently possible */
struct cgpu_info *cpus;



#ifdef HAVE_OPENCL

/* In dynamic mode, only the first thread of each device will be in use.
 * This potentially could start a thread that was stopped with the start-stop
 * options if one were to disable dynamic from the menu on a paused GPU */
void pause_dynamic_threads(int gpu)
{
	struct cgpu_info *cgpu = &gpus[gpu];
	int i;

	for (i = 1; i < cgpu->threads; i++) {
		struct thr_info *thr;

		thr = cgpu->thr[i];
		if (!thr->pause && cgpu->dynamic) {
			applog(LOG_WARNING, "Disabling extra threads due to dynamic mode.");
			applog(LOG_WARNING, "Tune dynamic intensity with --gpu-dyninterval");
		}

		thr->pause = cgpu->dynamic;
		if (!cgpu->dynamic && cgpu->deven != DEV_DISABLED)
			mt_enable(thr);
	}
}


struct device_drv opencl_api;

#endif /* HAVE_OPENCL */

#if defined(HAVE_OPENCL) && defined(HAVE_CURSES)
static
void opencl_wlogprint_status(struct cgpu_info *cgpu)
{
	struct thr_info *thr;
	int i;
	char checkin[40];
	double displayed_rolling;
	bool mhash_base = !(cgpu->rolling < 1);
	char logline[255];
	strcpy(logline, ""); // In case it has no data
	
	tailsprintf(logline, sizeof(logline), "I:%s%d  ", (cgpu->dynamic ? "d" : ""), cgpu->intensity);
#ifdef HAVE_ADL
	if (cgpu->has_adl) {
		int engineclock = 0, memclock = 0, activity = 0, fanspeed = 0, fanpercent = 0, powertune = 0;
		float temp = 0, vddc = 0;

		if (gpu_stats(cgpu->device_id, &temp, &engineclock, &memclock, &vddc, &activity, &fanspeed, &fanpercent, &powertune)) {
			if (fanspeed != -1 || fanpercent != -1) {
				tailsprintf(logline, sizeof(logline), "F: ");
				if (fanspeed > 9999)
					fanspeed = 9999;
				if (fanpercent != -1)
				{
					tailsprintf(logline, sizeof(logline), "%d%% ", fanpercent);
					if (fanspeed != -1)
						tailsprintf(logline, sizeof(logline), "(%d RPM) ", fanspeed);
				}
				else
					tailsprintf(logline, sizeof(logline), "%d RPM ", fanspeed);
				tailsprintf(logline, sizeof(logline), " ");
			}
			if (engineclock != -1)
				tailsprintf(logline, sizeof(logline), "E: %d MHz  ", engineclock);
			if (memclock != -1)
				tailsprintf(logline, sizeof(logline), "M: %d MHz  ", memclock);
			if (vddc != -1)
				tailsprintf(logline, sizeof(logline), "V: %.3fV  ", vddc);
			if (activity != -1)
				tailsprintf(logline, sizeof(logline), "A: %d%%  ", activity);
			if (powertune != -1)
				tailsprintf(logline, sizeof(logline), "P: %d%%", powertune);
		}
	}
#endif
	
	wlogprint("%s\n", logline);
	
	wlogprint("Last initialised: %s\n", cgpu->init);
	
	for (i = 0; i < mining_threads; i++) {
		thr = get_thread(i);
		if (thr->cgpu != cgpu)
			continue;
		
		get_datestamp(checkin, sizeof(checkin), time(NULL) - timer_elapsed(&thr->last, NULL));
		displayed_rolling = thr->rolling;
		if (!mhash_base)
			displayed_rolling *= 1000;
		snprintf(logline, sizeof(logline), "Thread %d: %.1f %sh/s %s ", i, displayed_rolling, mhash_base ? "M" : "K" , cgpu->deven != DEV_DISABLED ? "Enabled" : "Disabled");
		switch (cgpu->status) {
			default:
			case LIFE_WELL:
				tailsprintf(logline, sizeof(logline), "ALIVE");
				break;
			case LIFE_SICK:
				tailsprintf(logline, sizeof(logline), "SICK reported in %s", checkin);
				break;
			case LIFE_DEAD:
				tailsprintf(logline, sizeof(logline), "DEAD reported in %s", checkin);
				break;
			case LIFE_INIT:
			case LIFE_NOSTART:
				tailsprintf(logline, sizeof(logline), "Never started");
				break;
		}
		if (thr->pause)
			tailsprintf(logline, sizeof(logline), " paused");
		wlogprint("%s\n", logline);
	}
}

static
void opencl_tui_wlogprint_choices(struct cgpu_info *cgpu)
{
	wlogprint("[I]ntensity [R]estart GPU ");
#ifdef HAVE_ADL
	if (cgpu->has_adl)
		wlogprint("[C]hange settings ");
#endif
}

static
const char *opencl_tui_handle_choice(struct cgpu_info *cgpu, int input)
{
	switch (input)
	{
		case 'i': case 'I':
		{
			int intensity;
			char *intvar;

			if (opt_scrypt) {
				intvar = curses_input("Set GPU scan intensity (d or "
						      MIN_SCRYPT_INTENSITY_STR " -> "
						      MAX_SCRYPT_INTENSITY_STR ")");
			} else {
				intvar = curses_input("Set GPU scan intensity (d or "
						      MIN_SHA_INTENSITY_STR " -> "
						      MAX_SHA_INTENSITY_STR ")");
			}
			if (!intvar)
				return "Invalid intensity\n";
			if (!strncasecmp(intvar, "d", 1)) {
				cgpu->dynamic = true;
				pause_dynamic_threads(cgpu->device_id);
				free(intvar);
				return "Dynamic mode enabled\n";
			}
			intensity = atoi(intvar);
			free(intvar);
			if (intensity < MIN_INTENSITY || intensity > MAX_INTENSITY)
				return "Invalid intensity (out of range)\n";
			cgpu->dynamic = false;
			cgpu->intensity = intensity;
			pause_dynamic_threads(cgpu->device_id);
			return "Intensity changed\n";
		}
		case 'r': case 'R':
			reinit_device(cgpu);
			return "Attempting to restart\n";
		case 'c': case 'C':
		{
			char logline[256];
			
			clear_logwin();
			get_statline3(logline, sizeof(logline), cgpu, true, true);
			wattron(logwin, A_BOLD);
			wlogprint("%s", logline);
			wattroff(logwin, A_BOLD);
			wlogprint("\n");
			
			change_gpusettings(cgpu->device_id);
			return "";  // Force refresh
		}
	}
	return NULL;
}

#endif


#ifdef HAVE_OPENCL
static _clState *clStates[MAX_GPUDEVICES];

#define CL_SET_BLKARG(blkvar) status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->blkvar)
#define CL_SET_ARG(var) status |= clSetKernelArg(*kernel, num++, sizeof(var), (void *)&var)
#define CL_SET_VARG(args, var) status |= clSetKernelArg(*kernel, num++, args * sizeof(uint), (void *)var)

static cl_int queue_poclbm_kernel(_clState *clState, dev_blk_ctx *blk, cl_uint threads)
{
	cl_kernel *kernel = &clState->kernel;
	unsigned int num = 0;
	cl_int status = 0;

	CL_SET_BLKARG(ctx_a);
	CL_SET_BLKARG(ctx_b);
	CL_SET_BLKARG(ctx_c);
	CL_SET_BLKARG(ctx_d);
	CL_SET_BLKARG(ctx_e);
	CL_SET_BLKARG(ctx_f);
	CL_SET_BLKARG(ctx_g);
	CL_SET_BLKARG(ctx_h);

	CL_SET_BLKARG(cty_b);
	CL_SET_BLKARG(cty_c);

	
	CL_SET_BLKARG(cty_f);
	CL_SET_BLKARG(cty_g);
	CL_SET_BLKARG(cty_h);

	if (!clState->goffset) {
		cl_uint vwidth = clState->vwidth;
		uint *nonces = alloca(sizeof(uint) * vwidth);
		unsigned int i;

		for (i = 0; i < vwidth; i++)
			nonces[i] = blk->nonce + (i * threads);
		CL_SET_VARG(vwidth, nonces);
	}

	CL_SET_BLKARG(fW0);
	CL_SET_BLKARG(fW1);
	CL_SET_BLKARG(fW2);
	CL_SET_BLKARG(fW3);
	CL_SET_BLKARG(fW15);
	CL_SET_BLKARG(fW01r);

	CL_SET_BLKARG(D1A);
	CL_SET_BLKARG(C1addK5);
	CL_SET_BLKARG(B1addK6);
	CL_SET_BLKARG(W16addK16);
	CL_SET_BLKARG(W17addK17);
	CL_SET_BLKARG(PreVal4addT1);
	CL_SET_BLKARG(PreVal0);

	CL_SET_ARG(clState->outputBuffer);

	return status;
}

static cl_int queue_phatk_kernel(_clState *clState, dev_blk_ctx *blk,
				 __maybe_unused cl_uint threads)
{
	cl_kernel *kernel = &clState->kernel;
	cl_uint vwidth = clState->vwidth;
	unsigned int i, num = 0;
	cl_int status = 0;
	uint *nonces;

	CL_SET_BLKARG(ctx_a);
	CL_SET_BLKARG(ctx_b);
	CL_SET_BLKARG(ctx_c);
	CL_SET_BLKARG(ctx_d);
	CL_SET_BLKARG(ctx_e);
	CL_SET_BLKARG(ctx_f);
	CL_SET_BLKARG(ctx_g);
	CL_SET_BLKARG(ctx_h);

	CL_SET_BLKARG(cty_b);
	CL_SET_BLKARG(cty_c);
	CL_SET_BLKARG(cty_d);
	CL_SET_BLKARG(cty_f);
	CL_SET_BLKARG(cty_g);
	CL_SET_BLKARG(cty_h);

	nonces = alloca(sizeof(uint) * vwidth);
	for (i = 0; i < vwidth; i++)
		nonces[i] = blk->nonce + i;
	CL_SET_VARG(vwidth, nonces);

	CL_SET_BLKARG(W16);
	CL_SET_BLKARG(W17);
	CL_SET_BLKARG(PreVal4_2);
	CL_SET_BLKARG(PreVal0);
	CL_SET_BLKARG(PreW18);
	CL_SET_BLKARG(PreW19);
	CL_SET_BLKARG(PreW31);
	CL_SET_BLKARG(PreW32);

	CL_SET_ARG(clState->outputBuffer);

	return status;
}

static cl_int queue_diakgcn_kernel(_clState *clState, dev_blk_ctx *blk,
				   __maybe_unused cl_uint threads)
{
	cl_kernel *kernel = &clState->kernel;
	unsigned int num = 0;
	cl_int status = 0;

	if (!clState->goffset) {
		cl_uint vwidth = clState->vwidth;
		uint *nonces = alloca(sizeof(uint) * vwidth);
		unsigned int i;
		for (i = 0; i < vwidth; i++)
			nonces[i] = blk->nonce + i;
		CL_SET_VARG(vwidth, nonces);
	}

	CL_SET_BLKARG(PreVal0);
	CL_SET_BLKARG(PreVal4_2);
	CL_SET_BLKARG(cty_h);
	CL_SET_BLKARG(D1A);
	CL_SET_BLKARG(cty_b);
	CL_SET_BLKARG(cty_c);
	CL_SET_BLKARG(cty_f);
	CL_SET_BLKARG(cty_g);
	CL_SET_BLKARG(C1addK5);
	CL_SET_BLKARG(B1addK6);
	CL_SET_BLKARG(PreVal0addK7);
	CL_SET_BLKARG(W16addK16);
	CL_SET_BLKARG(W17addK17);
	CL_SET_BLKARG(PreW18);
	CL_SET_BLKARG(PreW19);
	CL_SET_BLKARG(W16);
	CL_SET_BLKARG(W17);
	CL_SET_BLKARG(PreW31);
	CL_SET_BLKARG(PreW32);

	CL_SET_BLKARG(ctx_a);
	CL_SET_BLKARG(ctx_b);
	CL_SET_BLKARG(ctx_c);
	CL_SET_BLKARG(ctx_d);
	CL_SET_BLKARG(ctx_e);
	CL_SET_BLKARG(ctx_f);
	CL_SET_BLKARG(ctx_g);
	CL_SET_BLKARG(ctx_h);

	CL_SET_BLKARG(zeroA);
	CL_SET_BLKARG(zeroB);

	CL_SET_BLKARG(oneA);
	CL_SET_BLKARG(twoA);
	CL_SET_BLKARG(threeA);
	CL_SET_BLKARG(fourA);
	CL_SET_BLKARG(fiveA);
	CL_SET_BLKARG(sixA);
	CL_SET_BLKARG(sevenA);

	CL_SET_ARG(clState->outputBuffer);

	return status;
}

static cl_int queue_diablo_kernel(_clState *clState, dev_blk_ctx *blk, cl_uint threads)
{
	cl_kernel *kernel = &clState->kernel;
	unsigned int num = 0;
	cl_int status = 0;

	if (!clState->goffset) {
		cl_uint vwidth = clState->vwidth;
		uint *nonces = alloca(sizeof(uint) * vwidth);
		unsigned int i;

		for (i = 0; i < vwidth; i++)
			nonces[i] = blk->nonce + (i * threads);
		CL_SET_VARG(vwidth, nonces);
	}


	CL_SET_BLKARG(PreVal0);
	CL_SET_BLKARG(PreVal0addK7);
	CL_SET_BLKARG(PreVal4addT1);
	CL_SET_BLKARG(PreW18);
	CL_SET_BLKARG(PreW19);
	CL_SET_BLKARG(W16);
	CL_SET_BLKARG(W17);
	CL_SET_BLKARG(W16addK16);
	CL_SET_BLKARG(W17addK17);
	CL_SET_BLKARG(PreW31);
	CL_SET_BLKARG(PreW32);

	CL_SET_BLKARG(D1A);
	CL_SET_BLKARG(cty_b);
	CL_SET_BLKARG(cty_c);
	CL_SET_BLKARG(cty_h);
	CL_SET_BLKARG(cty_f);
	CL_SET_BLKARG(cty_g);

	CL_SET_BLKARG(C1addK5);
	CL_SET_BLKARG(B1addK6);

	CL_SET_BLKARG(ctx_a);
	CL_SET_BLKARG(ctx_b);
	CL_SET_BLKARG(ctx_c);
	CL_SET_BLKARG(ctx_d);
	CL_SET_BLKARG(ctx_e);
	CL_SET_BLKARG(ctx_f);
	CL_SET_BLKARG(ctx_g);
	CL_SET_BLKARG(ctx_h);

	CL_SET_ARG(clState->outputBuffer);

	return status;
}

#ifdef USE_SCRYPT
static cl_int queue_scrypt_kernel(_clState *clState, dev_blk_ctx *blk, __maybe_unused cl_uint threads)
{
	unsigned char *midstate = blk->work->midstate;
	cl_kernel *kernel = &clState->kernel;
	unsigned int num = 0;
	cl_uint le_target;
	cl_int status = 0;

	le_target = *(cl_uint *)(blk->work->target + 28);
	clState->cldata = blk->work->data;
	status = clEnqueueWriteBuffer(clState->commandQueue, clState->CLbuffer0, true, 0, 80, clState->cldata, 0, NULL,NULL);

	CL_SET_ARG(clState->CLbuffer0);
	CL_SET_ARG(clState->outputBuffer);
	CL_SET_ARG(clState->padbuffer8);
	CL_SET_VARG(4, &midstate[0]);
	CL_SET_VARG(4, &midstate[16]);
	CL_SET_ARG(le_target);

	return status;
}
#endif

static void set_threads_hashes(unsigned int vectors,int64_t *hashes, size_t *globalThreads,
			       unsigned int minthreads, __maybe_unused int *intensity)
{
	unsigned int threads = 0;

	while (threads < minthreads) {
		threads = 1 << ((opt_scrypt ? 0 : 15) + *intensity);
		if (threads < minthreads) {
			if (likely(*intensity < MAX_INTENSITY))
				(*intensity)++;
			else
				threads = minthreads;
		}
	}

	*globalThreads = threads;
	*hashes = threads * vectors;
}
#endif /* HAVE_OPENCL */


#ifdef HAVE_OPENCL
/* We have only one thread that ever re-initialises GPUs, thus if any GPU
 * init command fails due to a completely wedged GPU, the thread will never
 * return, unable to harm other GPUs. If it does return, it means we only had
 * a soft failure and then the reinit_gpu thread is ready to tackle another
 * GPU */
void *reinit_gpu(void *userdata)
{
	struct thr_info *mythr = userdata;
	struct cgpu_info *cgpu, *sel_cgpu;
	struct thr_info *thr;
	char name[256];
	int thr_id;
	int i;

	pthread_detach(pthread_self());
	RenameThread("reinit_gpu");

select_cgpu:
	sel_cgpu =
	cgpu = tq_pop(mythr->q, NULL);
	if (!cgpu)
		goto out;

	if (clDevicesNum() != nDevs) {
		applog(LOG_WARNING, "Hardware not reporting same number of active devices, will not attempt to restart GPU");
		goto out;
	}

	for (i = 0; i < cgpu->threads; ++i)
	{
		thr = cgpu->thr[i];
		thr_id = thr->id;

		thr->rolling = thr->cgpu->rolling = 0;
		/* Reports the last time we tried to revive a sick GPU */
		cgtime(&thr->sick);
		if (!pthread_cancel(thr->pth)) {
			applog(LOG_WARNING, "Thread %d still exists, killing it off", thr_id);
		} else
			applog(LOG_WARNING, "Thread %d no longer exists", thr_id);
	}

	for (i = 0; i < cgpu->threads; ++i)
	{
		int virtual_gpu;

		thr = cgpu->thr[i];
		thr_id = thr->id;

		virtual_gpu = cgpu->virtual_gpu;
		/* Lose this ram cause we may get stuck here! */
		//tq_freeze(thr->q);

		thr->q = tq_new();
		if (!thr->q)
			quithere(1, "Failed to tq_new");

		/* Lose this ram cause we may dereference in the dying thread! */
		//free(clState);

		applog(LOG_INFO, "Reinit GPU thread %d", thr_id);
		clStates[thr_id] = initCl(virtual_gpu, name, sizeof(name));
		if (!clStates[thr_id]) {
			applog(LOG_ERR, "Failed to reinit GPU thread %d", thr_id);
			goto select_cgpu;
		}
		applog(LOG_INFO, "initCl() finished. Found %s", name);

		if (unlikely(thr_info_create(thr, NULL, miner_thread, thr))) {
			applog(LOG_ERR, "thread %d create failed", thr_id);
			return NULL;
		}
		applog(LOG_WARNING, "Thread %d restarted", thr_id);
	}

	get_now_datestamp(sel_cgpu->init, sizeof(sel_cgpu->init));

	proc_enable(cgpu);

	goto select_cgpu;
out:
	return NULL;
}
#else
void *reinit_gpu(__maybe_unused void *userdata)
{
	return NULL;
}
#endif


#ifdef HAVE_OPENCL
struct device_drv opencl_api;

static int opencl_autodetect()
{
	RUNONCE(0);
	
#ifndef WIN32
	if (!getenv("DISPLAY")) {
		applog(LOG_DEBUG, "DISPLAY not set, setting :0 just in case");
		setenv("DISPLAY", ":0", 1);
	}
#endif

	if (!load_opencl_symbols()) {
		nDevs = 0;
		return 0;
	}


	int i;

	nDevs = clDevicesNum();
	if (nDevs < 0) {
		applog(LOG_ERR, "clDevicesNum returned error, no GPUs usable");
		nDevs = 0;
	}

	if (!nDevs)
		return 0;

	/* If opt_g_threads is not set, use default 1 thread on scrypt and
	 * 2 for regular mining */
	if (opt_g_threads == -1) {
		if (opt_scrypt)
			opt_g_threads = 1;
		else
			opt_g_threads = 2;
	}

#ifdef HAVE_SENSORS
	struct opencl_device_data *data;
	const sensors_chip_name *cn;
	int c = 0;
	
	sensors_init(NULL);
	sensors_chip_name cnm;
	if (sensors_parse_chip_name("radeon-*", &cnm))
		c = -1;
#endif

	for (i = 0; i < nDevs; ++i) {
		struct cgpu_info *cgpu;

		cgpu = &gpus[i];
		cgpu->devtype = "GPU";
		cgpu->deven = DEV_ENABLED;
		cgpu->drv = &opencl_api;
		cgpu->device_id = i;
		cgpu->threads = opt_g_threads;
		cgpu->virtual_gpu = i;
		
#ifdef HAVE_SENSORS
		cn = (c == -1) ? NULL : sensors_get_detected_chips(&cnm, &c);
		cgpu->device_data = data = malloc(sizeof(*data));
		*data = (struct opencl_device_data){
			.sensor = cn,
		};
#endif
		
		add_cgpu(cgpu);
	}

	if (!opt_noadl)
		init_adl(nDevs);
	
	return nDevs;
}

static void opencl_detect()
{
	int flags = 0;
	if (!opt_scrypt)
		flags |= GDF_DEFAULT_NOAUTO;
	generic_detect(&opencl_api, NULL, opencl_autodetect, flags);
}

static void reinit_opencl_device(struct cgpu_info *gpu)
{
	tq_push(control_thr[gpur_thr_id].q, gpu);
}

// FIXME: Legacy (called by TUI) for side effects
static
bool override_opencl_statline_temp(char *buf, size_t bufsz, struct cgpu_info *gpu, __maybe_unused bool per_processor)
{
#ifdef HAVE_SENSORS
	struct opencl_device_data *data = gpu->device_data;
	if (data->sensor)
	{
		const sensors_chip_name *cn = data->sensor;
		const sensors_feature *feat;
		for (int f = 0; (feat = sensors_get_features(cn, &f)); )
		{
			const sensors_subfeature *subf;
			subf = sensors_get_subfeature(cn, feat, SENSORS_SUBFEATURE_TEMP_INPUT);
			if (!(subf && subf->flags & SENSORS_MODE_R))
				continue;
			
			double val;
			int rc = sensors_get_value(cn, subf->number, &val);
			if (rc)
				continue;
			
			gpu->temp = val;
			return false;
		}
	}
#endif
#ifdef HAVE_ADL
	if (gpu->has_adl) {
		int gpuid = gpu->device_id;
		gpu_temp(gpuid);
		gpu_fanspeed(gpuid);
	}
#endif
	return false;
}

static struct api_data*
get_opencl_api_extra_device_status(struct cgpu_info *gpu)
{
	struct api_data*root = NULL;

	float gt, gv;
	int ga, gf, gp, gc, gm, pt;
#ifdef HAVE_ADL
	if (!gpu_stats(gpu->device_id, &gt, &gc, &gm, &gv, &ga, &gf, &gp, &pt))
#endif
		gt = gv = gm = gc = ga = gf = gp = pt = 0;
	root = api_add_int(root, "Fan Speed", &gf, true);
	root = api_add_int(root, "Fan Percent", &gp, true);
	root = api_add_int(root, "GPU Clock", &gc, true);
	root = api_add_int(root, "Memory Clock", &gm, true);
	root = api_add_volts(root, "GPU Voltage", &gv, true);
	root = api_add_int(root, "GPU Activity", &ga, true);
	root = api_add_int(root, "Powertune", &pt, true);

	char intensity[20];
	if (gpu->dynamic)
		strcpy(intensity, "D");
	else
		sprintf(intensity, "%d", gpu->intensity);
	root = api_add_string(root, "Intensity", intensity, true);

	return root;
}

struct opencl_thread_data {
	cl_int (*queue_kernel_parameters)(_clState *, dev_blk_ctx *, cl_uint);
	uint32_t *res;
};

static uint32_t *blank_res;

static bool opencl_thread_prepare(struct thr_info *thr)
{
	char name[256];
	struct cgpu_info *cgpu = thr->cgpu;
	int gpu = cgpu->device_id;
	int virtual_gpu = cgpu->virtual_gpu;
	int i = thr->id;
	static bool failmessage = false;
	int buffersize = opt_scrypt ? SCRYPT_BUFFERSIZE : BUFFERSIZE;

	if (!blank_res)
		blank_res = calloc(buffersize, 1);
	if (!blank_res) {
		applog(LOG_ERR, "Failed to calloc in opencl_thread_init");
		return false;
	}

	strcpy(name, "");
	applog(LOG_INFO, "Init GPU thread %i GPU %i virtual GPU %i", i, gpu, virtual_gpu);
	clStates[i] = initCl(virtual_gpu, name, sizeof(name));
	if (!clStates[i]) {
#ifdef HAVE_CURSES
		if (use_curses)
			enable_curses();
#endif
		applog(LOG_ERR, "Failed to init GPU thread %d, disabling device %d", i, gpu);
		if (!failmessage) {
			applog(LOG_ERR, "Restarting the GPU from the menu will not fix this.");
			applog(LOG_ERR, "Try restarting BFGMiner.");
			failmessage = true;
#ifdef HAVE_CURSES
			char *buf;
			if (use_curses) {
				buf = curses_input("Press enter to continue");
				if (buf)
					free(buf);
			}
#endif
		}
		cgpu->deven = DEV_DISABLED;
		cgpu->status = LIFE_NOSTART;

		dev_error(cgpu, REASON_DEV_NOSTART);

		return false;
	}
	if (!cgpu->name)
		cgpu->name = strdup(name);
	if (!cgpu->kname)
	{
		switch (clStates[i]->chosen_kernel) {
			case KL_DIABLO:
				cgpu->kname = "diablo";
				break;
			case KL_DIAKGCN:
				cgpu->kname = "diakgcn";
				break;
			case KL_PHATK:
				cgpu->kname = "phatk";
				break;
#ifdef USE_SCRYPT
			case KL_SCRYPT:
				cgpu->kname = "scrypt";
				break;
#endif
			case KL_POCLBM:
				cgpu->kname = "poclbm";
				break;
			default:
				break;
		}
	}
	applog(LOG_INFO, "initCl() finished. Found %s", name);
	get_now_datestamp(cgpu->init, sizeof(cgpu->init));

	have_opencl = true;

	return true;
}

static bool opencl_thread_init(struct thr_info *thr)
{
	const int thr_id = thr->id;
	struct cgpu_info *gpu = thr->cgpu;
	struct opencl_thread_data *thrdata;
	_clState *clState = clStates[thr_id];
	cl_int status = 0;
	thrdata = calloc(1, sizeof(*thrdata));
	thr->cgpu_data = thrdata;
	int buffersize = opt_scrypt ? SCRYPT_BUFFERSIZE : BUFFERSIZE;

	if (!thrdata) {
		applog(LOG_ERR, "Failed to calloc in opencl_thread_init");
		return false;
	}

	switch (clState->chosen_kernel) {
		case KL_POCLBM:
			thrdata->queue_kernel_parameters = &queue_poclbm_kernel;
			break;
		case KL_PHATK:
			thrdata->queue_kernel_parameters = &queue_phatk_kernel;
			break;
		case KL_DIAKGCN:
			thrdata->queue_kernel_parameters = &queue_diakgcn_kernel;
			break;
#ifdef USE_SCRYPT
		case KL_SCRYPT:
			thrdata->queue_kernel_parameters = &queue_scrypt_kernel;
			gpu->min_nonce_diff = 1./0x10000;
			break;
#endif
		default:
		case KL_DIABLO:
			thrdata->queue_kernel_parameters = &queue_diablo_kernel;
			break;
	}

	thrdata->res = calloc(buffersize, 1);

	if (!thrdata->res) {
		free(thrdata);
		applog(LOG_ERR, "Failed to calloc in opencl_thread_init");
		return false;
	}

	status |= clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_TRUE, 0,
				       buffersize, blank_res, 0, NULL, NULL);
	if (unlikely(status != CL_SUCCESS)) {
		applog(LOG_ERR, "Error: clEnqueueWriteBuffer failed.");
		return false;
	}

	gpu->status = LIFE_WELL;

	gpu->device_last_well = time(NULL);

	return true;
}


static bool opencl_prepare_work(struct thr_info __maybe_unused *thr, struct work *work)
{
#ifdef USE_SCRYPT
	if (opt_scrypt)
		work->blk.work = work;
	else
#endif
		precalc_hash(&work->blk, (uint32_t *)(work->midstate), (uint32_t *)(work->data + 64));
	return true;
}

extern int opt_dynamic_interval;

static int64_t opencl_scanhash(struct thr_info *thr, struct work *work,
				int64_t __maybe_unused max_nonce)
{
	const int thr_id = thr->id;
	struct opencl_thread_data *thrdata = thr->cgpu_data;
	struct cgpu_info *gpu = thr->cgpu;
	_clState *clState = clStates[thr_id];
	const cl_kernel *kernel = &clState->kernel;
	const int dynamic_us = opt_dynamic_interval * 1000;

	cl_int status;
	size_t globalThreads[1];
	size_t localThreads[1] = { clState->wsize };
	int64_t hashes;
	int found = opt_scrypt ? SCRYPT_FOUND : FOUND;
	int buffersize = opt_scrypt ? SCRYPT_BUFFERSIZE : BUFFERSIZE;

	/* Windows' timer resolution is only 15ms so oversample 5x */
	if (gpu->dynamic && (++gpu->intervals * dynamic_us) > 70000) {
		struct timeval tv_gpuend;
		double gpu_us;

		cgtime(&tv_gpuend);
		gpu_us = us_tdiff(&tv_gpuend, &gpu->tv_gpustart) / gpu->intervals;
		if (gpu_us > dynamic_us) {
			if (gpu->intensity > MIN_INTENSITY)
				--gpu->intensity;
		} else if (gpu_us < dynamic_us / 2) {
			if (gpu->intensity < MAX_INTENSITY)
				++gpu->intensity;
		}
		memcpy(&(gpu->tv_gpustart), &tv_gpuend, sizeof(struct timeval));
		gpu->intervals = 0;
	}

	set_threads_hashes(clState->vwidth, &hashes, globalThreads, localThreads[0], &gpu->intensity);
	if (hashes > gpu->max_hashes)
		gpu->max_hashes = hashes;

	status = thrdata->queue_kernel_parameters(clState, &work->blk, globalThreads[0]);
	if (unlikely(status != CL_SUCCESS)) {
		applog(LOG_ERR, "Error: clSetKernelArg of all params failed.");
		return -1;
	}

	if (clState->goffset) {
		size_t global_work_offset[1];

		global_work_offset[0] = work->blk.nonce;
		status = clEnqueueNDRangeKernel(clState->commandQueue, *kernel, 1, global_work_offset,
						globalThreads, localThreads, 0,  NULL, NULL);
	} else
		status = clEnqueueNDRangeKernel(clState->commandQueue, *kernel, 1, NULL,
						globalThreads, localThreads, 0,  NULL, NULL);
	if (unlikely(status != CL_SUCCESS)) {
		applog(LOG_ERR, "Error %d: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)", status);
		return -1;
	}

	status = clEnqueueReadBuffer(clState->commandQueue, clState->outputBuffer, CL_FALSE, 0,
				     buffersize, thrdata->res, 0, NULL, NULL);
	if (unlikely(status != CL_SUCCESS)) {
		applog(LOG_ERR, "Error: clEnqueueReadBuffer failed error %d. (clEnqueueReadBuffer)", status);
		return -1;
	}

	/* The amount of work scanned can fluctuate when intensity changes
	 * and since we do this one cycle behind, we increment the work more
	 * than enough to prevent repeating work */
	work->blk.nonce += gpu->max_hashes;

	/* This finish flushes the readbuffer set with CL_FALSE in clEnqueueReadBuffer */
	clFinish(clState->commandQueue);

	/* FOUND entry is used as a counter to say how many nonces exist */
	if (thrdata->res[found]) {
		/* Clear the buffer again */
		status = clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_FALSE, 0,
					      buffersize, blank_res, 0, NULL, NULL);
		if (unlikely(status != CL_SUCCESS)) {
			applog(LOG_ERR, "Error: clEnqueueWriteBuffer failed.");
			return -1;
		}
		applog(LOG_DEBUG, "GPU %d found something?", gpu->device_id);
		postcalc_hash_async(thr, work, thrdata->res);
		memset(thrdata->res, 0, buffersize);
		/* This finish flushes the writebuffer set with CL_FALSE in clEnqueueWriteBuffer */
		clFinish(clState->commandQueue);
	}

	return hashes;
}

static void opencl_thread_shutdown(struct thr_info *thr)
{
	const int thr_id = thr->id;
	_clState *clState = clStates[thr_id];

	clReleaseKernel(clState->kernel);
	clReleaseProgram(clState->program);
	clReleaseCommandQueue(clState->commandQueue);
	clReleaseContext(clState->context);
}

struct device_drv opencl_api = {
	.dname = "opencl",
	.name = "OCL",
	.probe_priority = 110,
	.supported_algos = POW_SHA256D | POW_SCRYPT,
	.drv_detect = opencl_detect,
	.reinit_device = reinit_opencl_device,
	.override_statline_temp2 = override_opencl_statline_temp,
#ifdef HAVE_CURSES
	.proc_wlogprint_status = opencl_wlogprint_status,
	.proc_tui_wlogprint_choices = opencl_tui_wlogprint_choices,
	.proc_tui_handle_choice = opencl_tui_handle_choice,
#endif
	.get_api_extra_device_status = get_opencl_api_extra_device_status,
	.thread_prepare = opencl_thread_prepare,
	.thread_init = opencl_thread_init,
	.prepare_work = opencl_prepare_work,
	.scanhash = opencl_scanhash,
	.thread_shutdown = opencl_thread_shutdown,
};
#endif