implemented userspace reset utility

userspace/vendor-reset.c

@@ -16,7 +16,53 @@ this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 Place, Suite 330, Boston, MA 02111-1307 USA
 */
 
+#include "../include/vendor-reset.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
 int main(int argc, char * argv[])
 {
+  int ret;
+
+  if (argc < 4)
+  {
+    fprintf(stderr,
+      "Usage:\n"
+      "  %s <domain> <bus> <devfn>\n",
+      argv[0]
+    );
+    return -1;
+  }
+
+  int domain = atoi(argv[1]);
+  int bus    = atoi(argv[2]);
+  int devfn  = atoi(argv[3]);
+
+  int fd = open("/dev/vendor_reset", O_RDWR);
+  if (fd < 0)
+  {
+    perror("open");
+    return fd;
+  }
+
+  struct vendor_reset_ioctl dev =
+  {
+    .domain = domain,
+    .bus    = bus,
+    .devfn  = devfn
+  };
+
+  ret = ioctl(fd, VENDOR_RESET_RESET, &dev);
+  if (ret < 0)
+  {
+    perror("ioctl");
+    goto err;
+  }
+
+err:
+  close(fd);
   return 0;
 }