#! /usr/bin/python3
# Copyright(c) 2017, Intel Corporation
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * Neither the name of Intel Corporation nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import fcntl, os, sys, argparse, stat, struct
FPGA_FME_PORT_ASSIGN = 0xB582
FPGA_FME_PORT_RELEASE = 0xB581
if __name__ == "__main__":
# parse command line arguments
parser = argparse.ArgumentParser()
parser.add_argument('action', help = 'action to perform', action = 'store', choices = ['assign', 'release'])
parser.add_argument('device', help = 'the FPGA (FME) device')
parser.add_argument('port', type = int, help = 'the number of the port')
args = parser.parse_args()
# check device file
try:
mode = os.stat(args.device).st_mode
if not stat.S_ISCHR(mode):
print( args.device, "is not a device file.")
except Exception as e:
print("Couldn't open", args.device, ":", e)
sys.exit(1)
# open FPGA device
try:
f = open(args.device, "rw")
except Exception as e:
print("open() failed:", e)
sys.exit(1)
# send IOCTL
ioctl_data = struct.pack('III', 12, 0, args.port)
try:
if args.action == 'assign':
ret = fcntl.ioctl(f, FPGA_FME_PORT_ASSIGN, ioctl_data)
else:
ret = fcntl.ioctl(f, FPGA_FME_PORT_RELEASE, ioctl_data)
except Exception as e:
print("ioctl() failed:", e)
f.close()
sys.exit(1)
# close FPGA device
f.close()