From patchwork Thu Sep 17 08:17:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Parav Pandit X-Patchwork-Id: 1365968 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=nvidia.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=nvidia.com header.i=@nvidia.com header.a=rsa-sha256 header.s=n1 header.b=f1ZLKHRC; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4BsVN91Zbcz9sRf for ; Thu, 17 Sep 2020 18:23:21 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726402AbgIQIXR (ORCPT ); Thu, 17 Sep 2020 04:23:17 -0400 Received: from hqnvemgate24.nvidia.com ([216.228.121.143]:3198 "EHLO hqnvemgate24.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726321AbgIQIW5 (ORCPT ); Thu, 17 Sep 2020 04:22:57 -0400 Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate24.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 17 Sep 2020 01:16:21 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Thu, 17 Sep 2020 01:17:49 -0700 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Thu, 17 Sep 2020 01:17:49 -0700 Received: from sw-mtx-036.mtx.labs.mlnx (10.124.1.5) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 17 Sep 2020 08:17:49 +0000 From: Parav Pandit To: , , CC: Parav Pandit , Jiri Pirko Subject: [PATCH net-next 4/8] devlink: Support get and set state of port function Date: Thu, 17 Sep 2020 11:17:27 +0300 Message-ID: <20200917081731.8363-5-parav@nvidia.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200917081731.8363-1-parav@nvidia.com> References: <20200917081731.8363-1-parav@nvidia.com> MIME-Version: 1.0 X-Originating-IP: [10.124.1.5] X-ClientProxiedBy: HQMAIL101.nvidia.com (172.20.187.10) To HQMAIL107.nvidia.com (172.20.187.13) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1600330581; bh=wVUPQlv106oY+JsL8GVyqHIX8yKor1zTAaU/FqVuZ3A=; h=X-PGP-Universal: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=f1ZLKHRC1MfWG+hk8DK8U+cc2kxnwY2IUengEn0vHDGn3fmjjWmCT0leQzkqe6hpr NqrVpdkVZCDAWg3qvxs86uvy2vO0VhUF/G8d563uxfHTx5sHBSHBv6aSQZ1kG3sUOm Mn2yJy8guhsrrtgJviQEJz+Ia8LqlH24K0bNWVCl9nchjjbMDi7nb0t9heJNHirNpo K9UofXAjgwFZA1RkDGyX5hkskZk5AoVzKHafrm1OKDFZmPi21Lm6l+VETzEGx+teqI +5iSeNJWJ43lec9P5CwQT0mAAp56XtV4XiF5CvgxbPJv1VM0QWleNYBSCZo5prKPMz E97HXc+/oP+nA== Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org devlink port function can be in active or inactive state. Allow users to get and set port function's state. Example of a PCI SF port which supports a port function: Create a device with ID=10 and one physical port. $ echo "10 1" > /sys/bus/netdevsim/new_device $ devlink port show netdevsim/netdevsim10/0: type eth netdev eni10np1 flavour physical port 1 splittable false $ devlink port add netdevsim/netdevsim10/10 flavour pcipf pfnum 0 $ devlink port add netdevsim/netdevsim10/11 flavour pcisf pfnum 0 sfnum 44 $ devlink port show netdevsim/netdevsim10/11 netdevsim/netdevsim10/11: type eth netdev eni10npf0sf44 flavour pcisf controller 0 pfnum 0 sfnum 44 external false splittable false function: hw_addr 00:00:00:00:00:00 state inactive $ devlink port function set netdevsim/netdevsim10/11 hw_addr 00:11:22:33:44:55 state active $ devlink port show netdevsim/netdevsim10/11 -jp { "port": { "netdevsim/netdevsim10/11": { "type": "eth", "netdev": "eni10npf0sf44", "flavour": "pcisf", "controller": 0, "pfnum": 0, "sfnum": 44, "external": false, "splittable": false, "function": { "hw_addr": "00:11:22:33:44:55", "state": "active" } } } } Signed-off-by: Parav Pandit Reviewed-by: Jiri Pirko --- include/net/devlink.h | 20 ++++++++++ include/uapi/linux/devlink.h | 6 +++ net/core/devlink.c | 77 +++++++++++++++++++++++++++++++++++- 3 files changed, 101 insertions(+), 2 deletions(-) diff --git a/include/net/devlink.h b/include/net/devlink.h index ebab2c0360d0..500c22835686 100644 --- a/include/net/devlink.h +++ b/include/net/devlink.h @@ -1200,6 +1200,26 @@ struct devlink_ops { int (*port_function_hw_addr_set)(struct devlink *devlink, struct devlink_port *port, const u8 *hw_addr, int hw_addr_len, struct netlink_ext_ack *extack); + /** + * @port_function_state_get: Port function's state get function. + * + * Should be used by device drivers to report the state of a function managed + * by the devlink port. Driver should return -EOPNOTSUPP if it doesn't support port + * function handling for a particular port. + */ + int (*port_function_state_get)(struct devlink *devlink, struct devlink_port *port, + enum devlink_port_function_state *state, + struct netlink_ext_ack *extack); + /** + * @port_function_state_set: Port function's state set function. + * + * Should be used by device drivers to set the state of a function managed + * by the devlink port. Driver should return -EOPNOTSUPP if it doesn't support port + * function handling for a particular port. + */ + int (*port_function_state_set)(struct devlink *devlink, struct devlink_port *port, + enum devlink_port_function_state state, + struct netlink_ext_ack *extack); /** * @port_new: Port add function. * diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h index 09c41b9ce407..8e513f1cd638 100644 --- a/include/uapi/linux/devlink.h +++ b/include/uapi/linux/devlink.h @@ -518,9 +518,15 @@ enum devlink_resource_unit { enum devlink_port_function_attr { DEVLINK_PORT_FUNCTION_ATTR_UNSPEC, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, /* binary */ + DEVLINK_PORT_FUNCTION_ATTR_STATE, /* u8 */ __DEVLINK_PORT_FUNCTION_ATTR_MAX, DEVLINK_PORT_FUNCTION_ATTR_MAX = __DEVLINK_PORT_FUNCTION_ATTR_MAX - 1 }; +enum devlink_port_function_state { + DEVLINK_PORT_FUNCTION_STATE_INACTIVE, + DEVLINK_PORT_FUNCTION_STATE_ACTIVE, +}; + #endif /* _UAPI_LINUX_DEVLINK_H_ */ diff --git a/net/core/devlink.c b/net/core/devlink.c index d152489e48da..c82098cb75da 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -87,6 +87,9 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr); static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = { [DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY }, + [DEVLINK_PORT_FUNCTION_ATTR_STATE] = + NLA_POLICY_RANGE(NLA_U8, DEVLINK_PORT_FUNCTION_STATE_INACTIVE, + DEVLINK_PORT_FUNCTION_STATE_ACTIVE), }; static LIST_HEAD(devlink_list); @@ -595,6 +598,40 @@ devlink_port_function_hw_addr_fill(struct devlink *devlink, const struct devlink return 0; } +static bool devlink_port_function_state_valid(u8 state) +{ + return state == DEVLINK_PORT_FUNCTION_STATE_INACTIVE || + state == DEVLINK_PORT_FUNCTION_STATE_ACTIVE; +} + +static int devlink_port_function_state_fill(struct devlink *devlink, const struct devlink_ops *ops, + struct devlink_port *port, struct sk_buff *msg, + struct netlink_ext_ack *extack, bool *msg_updated) +{ + enum devlink_port_function_state state; + int err; + + if (!ops->port_function_state_get) + return 0; + + err = ops->port_function_state_get(devlink, port, &state, extack); + if (err) { + if (err == -EOPNOTSUPP) + return 0; + return err; + } + if (!devlink_port_function_state_valid(state)) { + WARN_ON(1); + NL_SET_ERR_MSG_MOD(extack, "Invalid state value read from driver"); + return -EINVAL; + } + err = nla_put_u8(msg, DEVLINK_PORT_FUNCTION_ATTR_STATE, state); + if (err) + return err; + *msg_updated = true; + return 0; +} + static int devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port, struct netlink_ext_ack *extack) @@ -611,6 +648,11 @@ devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *por ops = devlink->ops; err = devlink_port_function_hw_addr_fill(devlink, ops, port, msg, extack, &msg_updated); + if (err) + goto out; + err = devlink_port_function_state_fill(devlink, ops, port, msg, extack, &msg_updated); + +out: if (err || !msg_updated) nla_nest_cancel(msg, function_attr); else @@ -879,6 +921,28 @@ devlink_port_function_hw_addr_set(struct devlink *devlink, struct devlink_port * return 0; } +static int +devlink_port_function_state_set(struct devlink *devlink, struct devlink_port *port, + const struct nlattr *attr, struct netlink_ext_ack *extack) +{ + enum devlink_port_function_state state; + const struct devlink_ops *ops; + int err; + + state = nla_get_u8(attr); + ops = devlink->ops; + if (!ops->port_function_state_set) { + NL_SET_ERR_MSG_MOD(extack, "Port function does not support state setting"); + return -EOPNOTSUPP; + } + err = ops->port_function_state_set(devlink, port, state, extack); + if (err) + return err; + + devlink_port_notify(port, DEVLINK_CMD_PORT_NEW); + return 0; +} + static int devlink_port_function_set(struct devlink *devlink, struct devlink_port *port, const struct nlattr *attr, struct netlink_ext_ack *extack) @@ -894,9 +958,18 @@ devlink_port_function_set(struct devlink *devlink, struct devlink_port *port, } attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR]; - if (attr) + if (attr) { err = devlink_port_function_hw_addr_set(devlink, port, attr, extack); - + if (err) + return err; + } + /* Keep this as the last function attribute set, so that when + * multiple port function attributes are set along with state, + * Those can be applied first before activating the state. + */ + attr = tb[DEVLINK_PORT_FUNCTION_ATTR_STATE]; + if (attr) + err = devlink_port_function_state_set(devlink, port, attr, extack); return err; }