Move cl-utils back out of libcrystfel

2 files changed, 227 insertions, 0 deletions

diff --git a/src/cl-utils.c b/src/cl-utils.c
new file mode 100644
index 00000000..65a09363
--- /dev/null
+++ b/src/cl-utils.c
@@ -0,0 +1,200 @@
+/*
+ * cl-utils.c
+ *
+ * OpenCL utility functions
+ *
+ * (c) 2006-2011 Thomas White <taw@physics.org>
+ *
+ * Part of CrystFEL - crystallography with a FEL
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#ifdef HAVE_CL_CL_H
+#include <CL/cl.h>
+#else
+#include <cl.h>
+#endif
+
+#include "utils.h"
+
+
+const char *clError(cl_int err)
+{
+	switch ( err ) {
+	case CL_SUCCESS : return "no error";
+	case CL_INVALID_PLATFORM : return "invalid platform";
+	case CL_INVALID_KERNEL : return "invalid kernel";
+	case CL_INVALID_ARG_INDEX : return "invalid argument index";
+	case CL_INVALID_ARG_VALUE : return "invalid argument value";
+	case CL_INVALID_MEM_OBJECT : return "invalid memory object";
+	case CL_INVALID_SAMPLER : return "invalid sampler";
+	case CL_INVALID_ARG_SIZE : return "invalid argument size";
+	case CL_INVALID_COMMAND_QUEUE  : return "invalid command queue";
+	case CL_INVALID_CONTEXT : return "invalid context";
+	case CL_INVALID_VALUE : return "invalid value";
+	case CL_INVALID_EVENT_WAIT_LIST : return "invalid wait list";
+	case CL_MAP_FAILURE : return "map failure";
+	case CL_MEM_OBJECT_ALLOCATION_FAILURE : return "object allocation failure";
+	case CL_OUT_OF_HOST_MEMORY : return "out of host memory";
+	case CL_OUT_OF_RESOURCES : return "out of resources";
+	case CL_INVALID_KERNEL_NAME : return "invalid kernel name";
+	case CL_INVALID_KERNEL_ARGS : return "invalid kernel arguments";
+	case CL_INVALID_WORK_GROUP_SIZE : return "invalid work group size";
+	case CL_IMAGE_FORMAT_NOT_SUPPORTED : return "image format not supported";
+	case CL_INVALID_WORK_DIMENSION : return "invalid work dimension";
+	default :
+		return "unknown error";
+	}
+}
+
+
+static char *get_device_string(cl_device_id dev, cl_device_info info)
+{
+	int r;
+	size_t size;
+	char *val;
+
+	r = clGetDeviceInfo(dev, info, 0, NULL, &size);
+	if ( r != CL_SUCCESS ) {
+		ERROR("Couldn't get device vendor size: %s\n",
+		      clError(r));
+		return NULL;
+	}
+	val = malloc(size);
+	r = clGetDeviceInfo(dev, info, size, val, NULL);
+	if ( r != CL_SUCCESS ) {
+		ERROR("Couldn't get dev vendor: %s\n", clError(r));
+		return NULL;
+	}
+
+	return val;
+}
+
+
+cl_device_id get_cl_dev(cl_context ctx, int n)
+{
+	cl_device_id *dev;
+	cl_int r;
+	size_t size;
+	int i, num_devs;
+
+	/* Get the required size of the array */
+	r = clGetContextInfo(ctx, CL_CONTEXT_DEVICES, 0, NULL, &size);
+	if ( r != CL_SUCCESS ) {
+		ERROR("Couldn't get array size for devices: %s\n", clError(r));
+		return 0;
+	}
+
+	dev = malloc(size);
+	r = clGetContextInfo(ctx, CL_CONTEXT_DEVICES, size, dev, NULL);
+	if ( r != CL_SUCCESS ) {
+		ERROR("Couldn't get device: %s\n", clError(r));
+		return 0;
+	}
+	num_devs = size/sizeof(cl_device_id);
+
+	if ( n >= num_devs ) {
+		ERROR("Device ID out of range\n");
+		return 0;
+	}
+
+	if ( n < 0 ) {
+
+		STATUS("Available devices:\n");
+		for ( i=0; i<num_devs; i++ ) {
+
+			char *vendor;
+			char *name;
+
+			vendor = get_device_string(dev[i], CL_DEVICE_VENDOR);
+			name = get_device_string(dev[i], CL_DEVICE_NAME);
+
+			STATUS("Device %i: %s %s\n", i, vendor, name);
+
+		}
+		n = 0;
+
+		STATUS("Using device 0.  Use --gpu-dev to choose another.\n");
+
+	} else {
+
+		char *vendor;
+		char *name;
+
+		vendor = get_device_string(dev[n], CL_DEVICE_VENDOR);
+		name = get_device_string(dev[n], CL_DEVICE_NAME);
+
+		STATUS("Using device %i: %s %s\n", n, vendor, name);
+
+	}
+
+	return dev[n];
+}
+
+
+static void show_build_log(cl_program prog, cl_device_id dev)
+{
+	cl_int r;
+	char log[4096];
+	size_t s;
+
+	r = clGetProgramBuildInfo(prog, dev, CL_PROGRAM_BUILD_LOG, 4096, log,
+	                          &s);
+
+	STATUS("%s\n", log);
+}
+
+
+cl_program load_program(const char *filename, cl_context ctx,
+                        cl_device_id dev, cl_int *err, const char *extra_cflags)
+{
+	FILE *fh;
+	cl_program prog;
+	char *source;
+	size_t len;
+	cl_int r;
+	char cflags[1024] = "";
+
+	fh = fopen(filename, "r");
+	if ( fh == NULL ) {
+		ERROR("Couldn't open '%s'\n", filename);
+		*err = CL_INVALID_PROGRAM;
+		return 0;
+	}
+	source = malloc(16384);
+	len = fread(source, 1, 16383, fh);
+	fclose(fh);
+	source[len] = '\0';
+
+	prog = clCreateProgramWithSource(ctx, 1, (const char **)&source,
+	                                 NULL, err);
+	if ( *err != CL_SUCCESS ) {
+		ERROR("Couldn't load source\n");
+		return 0;
+	}
+
+	snprintf(cflags, 1023, "-Werror ");
+	strncat(cflags, "-I"DATADIR"/crystfel/ ", 1023-strlen(cflags));
+	strncat(cflags, "-cl-no-signed-zeros ", 1023-strlen(cflags));
+	strncat(cflags, extra_cflags, 1023-strlen(cflags));
+
+	r = clBuildProgram(prog, 0, NULL, cflags, NULL, NULL);
+	if ( r != CL_SUCCESS ) {
+		ERROR("Couldn't build program '%s'\n", filename);
+		show_build_log(prog, dev);
+		*err = r;
+		return 0;
+	}
+
+	free(source);
+	*err = CL_SUCCESS;
+	return prog;
+}
diff --git a/src/cl-utils.h b/src/cl-utils.h
new file mode 100644
index 00000000..21a7ecd2
--- /dev/null
+++ b/src/cl-utils.h
@@ -0,0 +1,27 @@
+/*
+ * cl-utils.h
+ *
+ * OpenCL utility functions
+ *
+ * (c) 2006-2010 Thomas White <taw@physics.org>
+ *
+ * Part of CrystFEL - crystallography with a FEL
+ *
+ */
+
+#ifndef CLUTILS_H
+#define CLUTILS_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+
+extern const char *clError(cl_int err);
+extern cl_device_id get_cl_dev(cl_context ctx, int n);
+extern cl_program load_program(const char *filename, cl_context ctx,
+                        cl_device_id dev, cl_int *err,
+                        const char *extra_cflags);
+
+
+#endif	/* CLUTILS_H */