From patchwork Sun Feb 7 08:44:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Parav Pandit X-Patchwork-Id: 378338 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16783C43381 for ; Sun, 7 Feb 2021 08:45:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D7EAB64EA7 for ; Sun, 7 Feb 2021 08:45:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229669AbhBGIpP (ORCPT ); Sun, 7 Feb 2021 03:45:15 -0500 Received: from hqnvemgate26.nvidia.com ([216.228.121.65]:2843 "EHLO hqnvemgate26.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229581AbhBGIpI (ORCPT ); Sun, 7 Feb 2021 03:45:08 -0500 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate26.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Sun, 07 Feb 2021 00:44:28 -0800 Received: from sw-mtx-036.mtx.labs.mlnx (172.20.145.6) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Sun, 7 Feb 2021 08:44:27 +0000 From: Parav Pandit To: , , CC: Parav Pandit Subject: [PATCH net-next v2 3/7] netdevsim: Simulate get hardware address of a PCI port Date: Sun, 7 Feb 2021 10:44:08 +0200 Message-ID: <20210207084412.252259-4-parav@nvidia.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210207084412.252259-1-parav@nvidia.com> References: <20210206125551.8616-1-parav@nvidia.com> <20210207084412.252259-1-parav@nvidia.com> MIME-Version: 1.0 X-Originating-IP: [172.20.145.6] X-ClientProxiedBy: HQMAIL111.nvidia.com (172.20.187.18) To HQMAIL107.nvidia.com (172.20.187.13) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1612687468; bh=mH3pMqgVGdMcGe+Ta7PrYlOYFc3VnRFvayqJLOv+XJs=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To: References:MIME-Version:Content-Transfer-Encoding:Content-Type: X-Originating-IP:X-ClientProxiedBy; b=ViiugQPCxqlvEc02BhLevtG8ADrZSxUildcLZhxYBLxJu/jZM4BO/1hn4q3uYCtq3 f8scJ+e4FyL4gbr464dzNaIhO/Pk8I85+69nuRUeq6y3SNpbk+z6gZLwwmE8ZzF8uB X8gkpTLOSlhOjfTyEtNThODePwpb8BFJJA7phXxQZhDxw9WwM7gB8hUwYiHZfG4waB /ZsN9CYXOyEA6/WpRkAnWzW6nrQoIeOfGAitZjt/YibfzyiS2wJcmi/v2PnS/jsZC8 ZkjS/qbtkvbTpjf5tFC8WtwRzPfsVm3m6CAsA2Dnp0AijcK6bN6xy+CJeIveQ8X1gV Q2jjCWQjtEL2w== Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Allow users to get hardware address for the PCI port. Below example creates one devlink port, queries a port and its hardware address. Example of a PCI SF port which supports a port function hw_addr set: Create a device with ID=10 and one physical port. $ echo "10 1" > /sys/bus/netdevsim/new_device Add PCI PF port: $ devlink port add netdevsim/netdevsim10 flavour pcipf pfnum 2 netdevsim/netdevsim10/1: type eth netdev eth1 flavour pcipf controller 0 pfnum 2 external false splittable false function: hw_addr 00:00:00:00:00:00 $ devlink port add netdevsim/netdevsim10 flavour pcisf pfnum 2 netdevsim/netdevsim10/2: type eth netdev eth2 flavour pcisf controller 0 pfnum 2 sfnum 0 splittable false function: hw_addr 00:00:00:00:00:00 Show devlink ports: $ devlink port show netdevsim/netdevsim10/0: type eth netdev eth0 flavour physical port 1 splittable false netdevsim/netdevsim10/1: type eth netdev eth1 flavour pcipf controller 0 pfnum 2 external false splittable false function: hw_addr 00:00:00:00:00:00 netdevsim/netdevsim10/2: type eth netdev eth2 flavour pcisf controller 0 pfnum 2 sfnum 0 splittable false function: hw_addr 00:00:00:00:00:00 Show the port and function attributes in JSON format: $ devlink port show netdevsim/netdevsim10/2 -jp { "port": { "netdevsim/netdevsim10/2": { "type": "eth", "netdev": "eth2", "flavour": "pcisf", "controller": 0, "pfnum": 2, "sfnum": 0, "splittable": false, "function": { "hw_addr": "00:00:00:00:00:00" } } } } Signed-off-by: Parav Pandit --- drivers/net/netdevsim/dev.c | 1 + drivers/net/netdevsim/netdevsim.h | 4 ++++ drivers/net/netdevsim/port_function.c | 30 +++++++++++++++++++++++++++ 3 files changed, 35 insertions(+) diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c index 806e387918fe..6046906d6b85 100644 --- a/drivers/net/netdevsim/dev.c +++ b/drivers/net/netdevsim/dev.c @@ -907,6 +907,7 @@ static const struct devlink_ops nsim_dev_devlink_ops = { .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get, .port_new = nsim_dev_devlink_port_new, .port_del = nsim_dev_devlink_port_del, + .port_function_hw_addr_get = nsim_dev_port_fn_hw_addr_get, }; #define NSIM_DEV_MAX_MACS_DEFAULT 32 diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h index efa7c08d842a..e910c3cf480d 100644 --- a/drivers/net/netdevsim/netdevsim.h +++ b/drivers/net/netdevsim/netdevsim.h @@ -320,3 +320,7 @@ int nsim_dev_devlink_port_new(struct devlink *devlink, unsigned int *new_port_index); int nsim_dev_devlink_port_del(struct devlink *devlink, unsigned int port_index, struct netlink_ext_ack *extack); +int nsim_dev_port_fn_hw_addr_get(struct devlink *devlink, + struct devlink_port *port, + u8 *hw_addr, int *hw_addr_len, + struct netlink_ext_ack *extack); diff --git a/drivers/net/netdevsim/port_function.c b/drivers/net/netdevsim/port_function.c index 86607d574930..882d1bdbfcf5 100644 --- a/drivers/net/netdevsim/port_function.c +++ b/drivers/net/netdevsim/port_function.c @@ -16,6 +16,7 @@ struct nsim_port_fn { int refcount; /* Counts how many sf ports are bound attached to this pf port. */ u32 sfnum; u16 pfnum; + u8 hw_addr[ETH_ALEN]; }; static struct devlink_port * @@ -431,3 +432,32 @@ void nsim_dev_port_fn_disable(struct nsim_dev *nsim_dev) nsim_devlink_port_fn_free(nsim_dev, port); } } + +static struct nsim_port_fn * +nsim_dev_to_port_fn(struct nsim_dev *nsim_dev, struct devlink_port *dl_port, + struct netlink_ext_ack *extack) +{ + if (nsim_dev_port_index_internal(nsim_dev, dl_port->index)) { + NL_SET_ERR_MSG_MOD(extack, + "Port index doesn't belong to user created port"); + return ERR_PTR(-EOPNOTSUPP); + } + return container_of(dl_port, struct nsim_port_fn, dl_port); +} + +int nsim_dev_port_fn_hw_addr_get(struct devlink *devlink, + struct devlink_port *dl_port, + u8 *hw_addr, int *hw_addr_len, + struct netlink_ext_ack *extack) +{ + struct nsim_dev *nsim_dev = devlink_priv(devlink); + struct nsim_port_fn *port; + + port = nsim_dev_to_port_fn(nsim_dev, dl_port, extack); + if (IS_ERR(port)) + return PTR_ERR(port); + + memcpy(hw_addr, port->hw_addr, ETH_ALEN); + *hw_addr_len = ETH_ALEN; + return 0; +}