add userspace library

git-svn-id: svn+ssh://en.codiert.org/home/staff/ben/dev/misc.svn/projects/fpgafs@393 766a2236-cff9-0310-b0c0-a81a5f92509a

libfpga/Makefile

@@ -0,0 +1,13 @@
+
+CFLAGS=-c -fPIC
+
+CC = gcc
+
+SRCS = libfpga.c
+OBJS = $(SRCS:%.c=%.o)
+
+libfpga: ${OBJS}
+	${CC} -shared -Wl,-soname,$@.so.1 -o $@.so.1.0.1 $^
+
+clean:
+	rm *.o *.so.*

libfpga/libfpga.c

@@ -0,0 +1,200 @@
+/*********************************************
+ * Benjamin Krill <ben@codiert.org>
+ *********************************************/
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+int fpgafs_create_context(int fd, const char *lldrv, const char *dir)
+{
+	char *cdir;
+	int res,fd1;
+
+	/* create context directory */
+	cdir=malloc(sizeof(dir) + 8);
+	sprintf(cdir, "/fpgafs/%s", dir);
+	if (mkdir(dir, 0777) == -1) {
+		printf("ERROR-1: %s\n", strerror(errno));
+		free(cdir);
+		return -1;
+	}
+
+	/* change to the context directory */
+	if (chdir(cdir) == -1) {
+		printf("ERROR-2: %s\n", strerror(errno));
+		free(cdir);
+		return -1;
+	}
+
+	free(cdir);
+	/* open the load file */
+	if ((fd1 = open("load", O_WRONLY, 0)) == -1) {
+		printf("ERROR-3: %s\n", strerror(errno));
+		return -1;
+	}
+
+	/* write the file into load */
+	free(cdir);
+	cdir=malloc(1024);
+	while ((res=read(fd, cdir, 1024)))
+		write(fd1, cdir, res);
+
+	free(cdir);
+	return 0;
+}
+
+int fpgafs_send_data(const char *dir, const void *buf, size_t count)
+{
+	int fd, res;
+	char *cdir;
+	cdir=malloc(sizeof(dir) + 8);
+	sprintf(cdir, "/fpgafs/%s", dir);
+
+	/* change to the context directory */
+	if (chdir(cdir) == -1) {
+		printf("ERROR-1: %s\n", strerror(errno));
+		free(cdir);
+		return -1;
+	}
+
+	free(cdir);
+	/* open the load file */
+	if ((fd = open("dout", O_RDONLY, 0)) == -1) {
+		printf("ERROR-2: %s\n", strerror(errno));
+		return -1;
+	}
+
+	/* write stuff into the file */
+	if ((res=write(fd, buf, count)) == -1) {
+		printf("ERROR-3: %s\n", strerror(errno));
+		return -1;
+	}
+
+	return res;
+}
+
+int fpgafs_recv_data(const char *dir, void *buf, size_t count)
+{
+	int fd, res;
+	char *cdir;
+	cdir=malloc(sizeof(dir) + 8);
+	sprintf(cdir, "/fpgafs/%s", dir);
+
+	/* change to the context directory */
+	if (chdir(cdir) == -1) {
+		printf("ERROR-1: %s\n", strerror(errno));
+		free(cdir);
+		return -1;
+	}
+
+	free(cdir);
+	/* open the load file */
+	if ((fd = open("din", O_WRONLY, 0)) == -1) {
+		printf("ERROR-2: %s\n", strerror(errno));
+		return -1;
+	}
+
+	/* write stuff into the file */
+	if ((res=read(fd, buf, count)) == -1) {
+		printf("ERROR-3: %s\n", strerror(errno));
+		return -1;
+	}
+
+	return res;
+}
+
+int fpgafs_send_cmd(const char *dir, unsigned int cmd)
+{
+	int fd, res;
+	char *cdir;
+	cdir=malloc(sizeof(dir) + 8);
+	sprintf(cdir, "/fpgafs/%s", dir);
+
+	/* change to the context directory */
+	if (chdir(cdir) == -1) {
+		printf("ERROR-1: %s\n", strerror(errno));
+		free(cdir);
+		return -1;
+	}
+
+	free(cdir);
+	/* open the load file */
+	if ((fd = open("cmd", O_WRONLY, 0)) == -1) {
+		printf("ERROR-2: %s\n", strerror(errno));
+		return -1;
+	}
+
+	/* write stuff into the file */
+	if ((res=write(fd, (const char *)&cmd, 4)) == -1) {
+		printf("ERROR-3: %s\n", strerror(errno));
+		return -1;
+	}
+
+	return res;
+}
+
+int fpgafs_get_stat(const char *dir)
+{
+	int fd;
+	char *cdir;
+	char buf[4];
+	int res;
+	cdir=malloc(sizeof(dir) + 8);
+	sprintf(cdir, "/fpgafs/%s", dir);
+
+	/* change to the context directory */
+	if (chdir(cdir) == -1) {
+		printf("ERROR-1: %s\n", strerror(errno));
+		free(cdir);
+		return -1;
+	}
+
+	free(cdir);
+	/* open the load file */
+	if ((fd = open("stat", O_RDONLY, 0)) == -1) {
+		printf("ERROR-2: %s\n", strerror(errno));
+		return -1;
+	}
+
+	/* write stuff into the file */
+	if ((res=read(fd, buf, 4)) == -1) {
+		printf("ERROR-3: %s\n", strerror(errno));
+		return -1;
+	}
+
+	return (int)*(int*)&buf[0];
+}
+
+int fpgafs_set_lldrv(const char *dir, const char* name)
+{
+	int fd;
+	char *cdir;
+	int res;
+	cdir=malloc(sizeof(dir) + 8);
+	sprintf(cdir, "/fpgafs/%s", dir);
+
+	/* change to the context directory */
+	if (chdir(cdir) == -1) {
+		printf("ERROR-1: %s\n", strerror(errno));
+		free(cdir);
+		return -1;
+	}
+
+	free(cdir);
+	/* open the load file */
+	if ((fd = open("lldrv", O_WRONLY, 0)) == -1) {
+		printf("ERROR-2: %s\n", strerror(errno));
+		return -1;
+	}
+
+	/* write stuff into the file */
+	if ((res=write(fd, name, 5)) == -1) {
+		printf("ERROR-3: %s\n", strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}

libfpga/libfpga.h

@@ -0,0 +1,9 @@
+/*********************************************
+ * Benjamin Krill <ben@codiert.org>
+ *********************************************/
+int fpgafs_create_context(int fd, const char *name)
+int fpgafs_send_data(const void *buf, size_t count);
+int fpgafs_recv_data(void *buf, size_t count);
+int fpgafs_send_cmd(unsigned int cmd);
+int fpgafs_get_stat();
+int fpgafs_set_lldrv(const char* name);