From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 48A27A0547; Fri, 28 May 2021 15:56:10 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 7744B410F2; Fri, 28 May 2021 15:56:05 +0200 (CEST) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by mails.dpdk.org (Postfix) with ESMTP id 31C1740040 for ; Fri, 28 May 2021 15:56:04 +0200 (CEST) IronPort-SDR: 2YPrlEB5l+3tNaKYv7CMuWHd5i/2ZbO5CRMfkVdCcpeAcKLFZwh3mIUN3DZAmKh5yBqc2+nmhh swcV68ktDYkQ== X-IronPort-AV: E=McAfee;i="6200,9189,9998"; a="183301277" X-IronPort-AV: E=Sophos;i="5.83,229,1616482800"; d="scan'208";a="183301277" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 May 2021 06:56:02 -0700 IronPort-SDR: GGjejH0aaq6CgKZUPenJLW28ndqrxl5epEqY6faYRpFPfEcMlkdSJmRYU/FOwZkbK5xcEczK/G utfM1wEMfI7g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.83,229,1616482800"; d="scan'208";a="477934775" Received: from silpixa00401026.ir.intel.com ([10.243.23.108]) by orsmga001.jf.intel.com with ESMTP; 28 May 2021 06:56:01 -0700 From: Kevin Laatz To: dev@dpdk.org Cc: bruce.richardson@intel.com, Kevin Laatz Date: Fri, 28 May 2021 14:55:58 +0100 Message-Id: <20210528135559.344815-2-kevin.laatz@intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210528135559.344815-1-kevin.laatz@intel.com> References: <20210528131902.344423-1-kevin.laatz@intel.com> <20210528135559.344815-1-kevin.laatz@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v3 1/2] raw/ioat: add pci address handling to python script X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Currently the user needs to find the DSA instance number for any DSA device they would like to configure using this script, which can be cumbersome and error-prone since the instance numbering may change when changing the binding of the devices between vfio-pci and idxd. This patch improves the usability of the script by adding the ability to specify the DSA device to configure using the device's PCI address instead of the DSA instance number. For example, "$dpdk_idxd_cfg.py 0" and "$dpdk_idxd_cfg.py 6a:01.0" are both valid references to the same device (assuming the numbering). Signed-off-by: Kevin Laatz Acked-by: Bruce Richardson --- v2: - split the device reset change into its own patch - changed sysfs dir search - improved error case handling v3: minor commit log updates --- drivers/raw/ioat/dpdk_idxd_cfg.py | 28 ++++++++++++++++++++++++++-- 1 file changed, 26 insertions(+), 2 deletions(-) diff --git a/drivers/raw/ioat/dpdk_idxd_cfg.py b/drivers/raw/ioat/dpdk_idxd_cfg.py index ff06d9e240..ad8393a645 100755 --- a/drivers/raw/ioat/dpdk_idxd_cfg.py +++ b/drivers/raw/ioat/dpdk_idxd_cfg.py @@ -29,6 +29,26 @@ def write_values(self, values): f.write(str(contents)) +def get_pci_dir(pci): + "Search for the sysfs directory of the PCI device" + base_dir = '/sys/bus/pci/devices/' + for path, dirs, files in os.walk(base_dir): + for dir in dirs: + if pci in dir: + return os.path.join(base_dir, dir) + sys.exit(f"Could not find sysfs directory for device {pci}") + + +def get_dsa_id(pci): + "Get the DSA instance ID using the PCI address of the device" + pci_dir = get_pci_dir(pci) + for path, dirs, files in os.walk(pci_dir): + for dir in dirs: + if dir.startswith('dsa') and 'wq' not in dir: + return int(dir[3:]) + sys.exit(f"Could not get device ID for device {pci}") + + def configure_dsa(dsa_id, queues, prefix): "Configure the DSA instance with appropriate number of queues" dsa_dir = SysfsDir(f"/sys/bus/dsa/devices/dsa{dsa_id}") @@ -68,14 +88,18 @@ def main(args): "Main function, does arg parsing and calls config function" arg_p = argparse.ArgumentParser( description="Configure whole DSA device instance for DPDK use") - arg_p.add_argument('dsa_id', type=int, help="DSA instance number") + arg_p.add_argument('dsa_id', + help="Specify DSA instance either via DSA instance number or PCI address") arg_p.add_argument('-q', metavar='queues', type=int, default=255, help="Number of queues to set up") arg_p.add_argument('--name-prefix', metavar='prefix', dest='prefix', default="dpdk", help="Prefix for workqueue name to mark for DPDK use [default: 'dpdk']") parsed_args = arg_p.parse_args(args[1:]) - configure_dsa(parsed_args.dsa_id, parsed_args.q, parsed_args.prefix) + + dsa_id = parsed_args.dsa_id + dsa_id = get_dsa_id(dsa_id) if ':' in dsa_id else dsa_id + configure_dsa(dsa_id, parsed_args.q, parsed_args.prefix) if __name__ == "__main__": -- 2.30.2