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
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13
libfpga/Makefile
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13
libfpga/Makefile
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CFLAGS=-c -fPIC
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CC = gcc
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SRCS = libfpga.c
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OBJS = $(SRCS:%.c=%.o)
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libfpga: ${OBJS}
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${CC} -shared -Wl,-soname,$@.so.1 -o $@.so.1.0.1 $^
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clean:
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rm *.o *.so.*
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200
libfpga/libfpga.c
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libfpga/libfpga.c
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/*********************************************
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* Benjamin Krill <ben@codiert.org>
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*********************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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int fpgafs_create_context(int fd, const char *lldrv, const char *dir)
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{
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char *cdir;
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int res,fd1;
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/* create context directory */
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cdir=malloc(sizeof(dir) + 8);
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sprintf(cdir, "/fpgafs/%s", dir);
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if (mkdir(dir, 0777) == -1) {
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printf("ERROR-1: %s\n", strerror(errno));
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free(cdir);
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return -1;
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}
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/* change to the context directory */
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if (chdir(cdir) == -1) {
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printf("ERROR-2: %s\n", strerror(errno));
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free(cdir);
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return -1;
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}
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free(cdir);
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/* open the load file */
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if ((fd1 = open("load", O_WRONLY, 0)) == -1) {
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printf("ERROR-3: %s\n", strerror(errno));
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return -1;
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}
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/* write the file into load */
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free(cdir);
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cdir=malloc(1024);
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while ((res=read(fd, cdir, 1024)))
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write(fd1, cdir, res);
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free(cdir);
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return 0;
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}
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int fpgafs_send_data(const char *dir, const void *buf, size_t count)
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{
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int fd, res;
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char *cdir;
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cdir=malloc(sizeof(dir) + 8);
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sprintf(cdir, "/fpgafs/%s", dir);
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/* change to the context directory */
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if (chdir(cdir) == -1) {
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printf("ERROR-1: %s\n", strerror(errno));
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free(cdir);
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return -1;
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}
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free(cdir);
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/* open the load file */
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if ((fd = open("dout", O_RDONLY, 0)) == -1) {
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printf("ERROR-2: %s\n", strerror(errno));
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return -1;
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}
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/* write stuff into the file */
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if ((res=write(fd, buf, count)) == -1) {
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printf("ERROR-3: %s\n", strerror(errno));
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return -1;
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}
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return res;
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}
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int fpgafs_recv_data(const char *dir, void *buf, size_t count)
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{
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int fd, res;
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char *cdir;
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cdir=malloc(sizeof(dir) + 8);
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sprintf(cdir, "/fpgafs/%s", dir);
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/* change to the context directory */
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if (chdir(cdir) == -1) {
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printf("ERROR-1: %s\n", strerror(errno));
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free(cdir);
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return -1;
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}
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free(cdir);
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/* open the load file */
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if ((fd = open("din", O_WRONLY, 0)) == -1) {
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printf("ERROR-2: %s\n", strerror(errno));
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return -1;
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}
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/* write stuff into the file */
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if ((res=read(fd, buf, count)) == -1) {
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printf("ERROR-3: %s\n", strerror(errno));
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return -1;
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}
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return res;
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}
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int fpgafs_send_cmd(const char *dir, unsigned int cmd)
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{
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int fd, res;
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char *cdir;
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cdir=malloc(sizeof(dir) + 8);
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sprintf(cdir, "/fpgafs/%s", dir);
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/* change to the context directory */
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if (chdir(cdir) == -1) {
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printf("ERROR-1: %s\n", strerror(errno));
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free(cdir);
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return -1;
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}
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free(cdir);
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/* open the load file */
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if ((fd = open("cmd", O_WRONLY, 0)) == -1) {
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printf("ERROR-2: %s\n", strerror(errno));
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return -1;
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}
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/* write stuff into the file */
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if ((res=write(fd, (const char *)&cmd, 4)) == -1) {
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printf("ERROR-3: %s\n", strerror(errno));
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return -1;
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}
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return res;
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}
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int fpgafs_get_stat(const char *dir)
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{
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int fd;
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char *cdir;
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char buf[4];
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int res;
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cdir=malloc(sizeof(dir) + 8);
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sprintf(cdir, "/fpgafs/%s", dir);
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/* change to the context directory */
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if (chdir(cdir) == -1) {
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printf("ERROR-1: %s\n", strerror(errno));
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free(cdir);
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return -1;
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}
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free(cdir);
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/* open the load file */
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if ((fd = open("stat", O_RDONLY, 0)) == -1) {
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printf("ERROR-2: %s\n", strerror(errno));
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return -1;
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}
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/* write stuff into the file */
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if ((res=read(fd, buf, 4)) == -1) {
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printf("ERROR-3: %s\n", strerror(errno));
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return -1;
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}
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return (int)*(int*)&buf[0];
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}
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int fpgafs_set_lldrv(const char *dir, const char* name)
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{
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int fd;
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char *cdir;
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int res;
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cdir=malloc(sizeof(dir) + 8);
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sprintf(cdir, "/fpgafs/%s", dir);
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/* change to the context directory */
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if (chdir(cdir) == -1) {
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printf("ERROR-1: %s\n", strerror(errno));
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free(cdir);
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return -1;
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}
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free(cdir);
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/* open the load file */
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if ((fd = open("lldrv", O_WRONLY, 0)) == -1) {
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printf("ERROR-2: %s\n", strerror(errno));
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return -1;
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}
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/* write stuff into the file */
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if ((res=write(fd, name, 5)) == -1) {
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printf("ERROR-3: %s\n", strerror(errno));
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return -1;
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}
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return 0;
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}
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9
libfpga/libfpga.h
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9
libfpga/libfpga.h
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@ -0,0 +1,9 @@
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/*********************************************
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* Benjamin Krill <ben@codiert.org>
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*********************************************/
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int fpgafs_create_context(int fd, const char *name)
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int fpgafs_send_data(const void *buf, size_t count);
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int fpgafs_recv_data(void *buf, size_t count);
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int fpgafs_send_cmd(unsigned int cmd);
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int fpgafs_get_stat();
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int fpgafs_set_lldrv(const char* name);
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