From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 14DF0255 for ; Fri, 30 Jan 2015 05:59:57 +0100 (CET) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga102.fm.intel.com with ESMTP; 29 Jan 2015 20:59:55 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,490,1418112000"; d="scan'208";a="678388288" Received: from shvmail01.sh.intel.com ([10.239.29.42]) by orsmga002.jf.intel.com with ESMTP; 29 Jan 2015 20:59:56 -0800 Received: from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com [10.239.29.89]) by shvmail01.sh.intel.com with ESMTP id t0U4xrwo016817; Fri, 30 Jan 2015 12:59:53 +0800 Received: from shecgisg004.sh.intel.com (localhost [127.0.0.1]) by shecgisg004.sh.intel.com (8.13.6/8.13.6/SuSE Linux 0.8) with ESMTP id t0U4xpwW015571; Fri, 30 Jan 2015 12:59:53 +0800 Received: (from zzang@localhost) by shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id t0U4xp5a015567; Fri, 30 Jan 2015 12:59:51 +0800 From: zhida zang To: dev@dpdk.org Date: Fri, 30 Jan 2015 12:57:02 +0800 Message-Id: <1422593822-15531-1-git-send-email-zhida.zang@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: References: Subject: [dpdk-dev] [PATCH] scripts: enable extended tag of PCIe X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Jan 2015 04:59:58 -0000 As 'extended tag' of PCIe needs to be enabled for i40e high performance, Linux command of 'setpci' can be used to check and set the corresponding bit of 'extended tag' of PCIe configuration space. The script is to check and set the right bit in PCIe configuration space to enable 'extended tag'. Signed-off-by: Zhida Zang --- tools/set_pci.py | 124 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 124 insertions(+) create mode 100755 tools/set_pci.py diff --git a/tools/set_pci.py b/tools/set_pci.py new file mode 100755 index 0000000..e242efb --- /dev/null +++ b/tools/set_pci.py @@ -0,0 +1,124 @@ +#! /usr/bin/python +import sys +import os +import subprocess +import getopt +from os.path import basename + +# The register to check if extended tag is supported or not. +PCI_DEV_CAP_REG = 0xA4 +# The control register which contains the bit to enable/disable 'extended tag'. +PCI_DEV_CTRL_REG = 0xA8 +# The mask of 'extended tag' in capability register. +PCI_DEV_CAP_EXT_TAG_MASK = 0x20 +# The mask of 'extended tag' in control register. +PCI_DEV_CTRL_EXT_TAG_MASK = 0x100 + +dev_ids = {} +flag = "Set" + + +def usage(): + '''Print usage information for the program''' + argv0 = basename(sys.argv[0]) + print """ +Usage: +------ + + %(argv0)s [options] DEVICE1 DEVICE2 .... + +where DEVICE1, DEVICE2 etc, are specified via PCI "domain:bus:slot.func" syntax +or "bus:slot.func" syntax. For devices bound to Linux kernel drivers, they may +also be referred to by Linux interface name e.g. eth0, eth1, em0, em1, etc. + +Options: + --help, --usage: + Display usage information and quit + + -s --set: + Set the following pci device + + -u --Unset: + Unset the following pci device + +Examples: +--------- +To set pci 0a:00.0 + %(argv0)s -s 0a:00.0 + %(argv0)s --set 0a:00.0 + +To unset 0000:01:00.0 + %(argv0)s -u 0000:01:00.0 + %(argv0)s --unset 0000:01:00.0 + +To set 0000:02:00.0 and 0000:02:00.1 + %(argv0)s -s 02:00.0 02:00.1 + + """ % locals() # replace items from local variables + + +def parse_args(): + global flag + global dev_ids + if len(sys.argv) <= 1: + usage() + sys.exit(0) + try: + opts, dev_ids = getopt.getopt( + sys.argv[1:], + "su", + ["help", "usage", "set", "unset"] + ) + except getopt.GetoptError, error: + print str(error) + print "Run '%s --usage' for further information" % sys.argv[0] + sys.exit(1) + + for opt, arg in opts: + if opt == "--help" or opt == "--usage": + usage() + sys.exit(0) + if opt == "-s" or opt == "--set": + flag = "Set" + if opt == "-u" or opt == "--unset": + flag = "Unset" + + +def check_output(args, stderr=None): + '''Run a command and capture its output''' + return subprocess.Popen( + args, + stdout=subprocess.PIPE, + stderr=stderr + ).communicate()[0] + + +def set_pci(): + if len(dev_ids) == 0: + print "Error: No devices specified." + print "Run '%s --usage' for further information" % sys.argv[0] + sys.exit(1) + param_cap = "%x.W" % PCI_DEV_CAP_REG + for k in range(len(dev_ids)): + val = check_output(["setpci", "-s", dev_ids[k], param_cap]) + if (not (int(val, 16) & PCI_DEV_CAP_EXT_TAG_MASK)): + print dev_ids[k], "Not supported" + continue + if (int(val, 16) & PCI_DEV_CTRL_EXT_TAG_MASK): + continue + param_ctrl = "%x.W" % PCI_DEV_CTRL_REG + val = check_output(["setpci", "-s", dev_ids[k], param_ctrl]) + if flag == "Set": + val = int(val, 16) | PCI_DEV_CTRL_EXT_TAG_MASK + else: + val = int(val, 16) & ~PCI_DEV_CTRL_EXT_TAG_MASK + param_ctrl = "%x.W=%x" % (PCI_DEV_CTRL_REG, val) + check_output(["setpci", "-s", dev_ids[k], param_ctrl]) + + +def main(): + parse_args() + set_pci() + +if __name__ == "__main__": + main() -- 1.9.3