From patchwork Fri Jun 9 12:18:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kubalewski, Arkadiusz" X-Patchwork-Id: 13273834 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6781C83003 for ; Fri, 9 Jun 2023 12:23:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240752AbjFIMXK (ORCPT ); Fri, 9 Jun 2023 08:23:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34730 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240514AbjFIMWs (ORCPT ); Fri, 9 Jun 2023 08:22:48 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7C79835BE; Fri, 9 Jun 2023 05:22:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1686313333; x=1717849333; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Zhbjko0NgU1oleUi+zxl4wXpj+Yil0aX0uPPaAmiadI=; b=YRaQr2P1qKzviuIA5OMebnRD1a8eMQQG2ROBRT4S6GNA6gbg9FOld29l z/EXO8mCxjUKc+ppGqQp781TIIPXHtcc/1uzTDRWjWXVgKXxkqXa0H1Pb jybVRc+FklYJ1zDirUdnpYHUEtchAAUCDLulPnc6QnVqUH89ODYHBenwa osw+AX0/MaX+efgvnvsj/cxjqX3j9iZqNBaNNlNa+vfp6rrVXss5QQOCS GlSWvYCXD7MyV10Q1XVihjfBzpv98xYBF/etpv3gqE7j08Pu/xAA2hUpW GVxbENeVUBjy4hhi6LgmdDH7v2dypghBmjBaeg6ZCu3iZCyfMxupPc/6M A==; X-IronPort-AV: E=McAfee;i="6600,9927,10735"; a="337220246" X-IronPort-AV: E=Sophos;i="6.00,229,1681196400"; d="scan'208";a="337220246" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Jun 2023 05:22:11 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10735"; a="710348658" X-IronPort-AV: E=Sophos;i="6.00,229,1681196400"; d="scan'208";a="710348658" Received: from amlin-018-114.igk.intel.com ([10.102.18.114]) by orsmga002.jf.intel.com with ESMTP; 09 Jun 2023 05:21:59 -0700 From: Arkadiusz Kubalewski To: kuba@kernel.org, jiri@resnulli.us, arkadiusz.kubalewski@intel.com, vadfed@meta.com, jonathan.lemon@gmail.com, pabeni@redhat.com Cc: corbet@lwn.net, davem@davemloft.net, edumazet@google.com, vadfed@fb.com, jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com, saeedm@nvidia.com, leon@kernel.org, richardcochran@gmail.com, sj@kernel.org, javierm@redhat.com, ricardo.canuelo@collabora.com, mst@redhat.com, tzimmermann@suse.de, michal.michalik@intel.com, gregkh@linuxfoundation.org, jacek.lawrynowicz@linux.intel.com, airlied@redhat.com, ogabbay@kernel.org, arnd@arndb.de, nipun.gupta@amd.com, axboe@kernel.dk, linux@zary.sk, masahiroy@kernel.org, benjamin.tissoires@redhat.com, geert+renesas@glider.be, milena.olech@intel.com, kuniyu@amazon.com, liuhangbin@gmail.com, hkallweit1@gmail.com, andy.ren@getcruise.com, razor@blackwall.org, idosch@nvidia.com, lucien.xin@gmail.com, nicolas.dichtel@6wind.com, phil@nwl.cc, claudiajkang@gmail.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, linux-rdma@vger.kernel.org, linux-arm-kernel@lists.infradead.org, poros@redhat.com, mschmidt@redhat.com, linux-clk@vger.kernel.org, vadim.fedorenko@linux.dev, Jiri Pirko Subject: [RFC PATCH v8 06/10] netdev: expose DPLL pin handle for netdevice Date: Fri, 9 Jun 2023 14:18:49 +0200 Message-Id: <20230609121853.3607724-7-arkadiusz.kubalewski@intel.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20230609121853.3607724-1-arkadiusz.kubalewski@intel.com> References: <20230609121853.3607724-1-arkadiusz.kubalewski@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Jiri Pirko In case netdevice represents a SyncE port, the user needs to understand the connection between netdevice and associated DPLL pin. There might me multiple netdevices pointing to the same pin, in case of VF/SF implementation. Add a IFLA Netlink attribute to nest the DPLL pin handle, similar to how it is implemented for devlink port. Add a struct dpll_pin pointer to netdev and protect access to it by RTNL. Expose netdev_dpll_pin_set() and netdev_dpll_pin_clear() helpers to the drivers so they can set/clear the DPLL pin relationship to netdev. Note that during the lifetime of struct dpll_pin the pin handle does not change. Therefore it is save to access it lockless. It is drivers responsibility to call netdev_dpll_pin_clear() before dpll_pin_put(). Signed-off-by: Jiri Pirko Signed-off-by: Arkadiusz Kubalewski --- drivers/dpll/dpll_netlink.c | 28 ++++++++++++++++++-------- include/linux/dpll.h | 20 +++++++++++++++++++ include/linux/netdevice.h | 10 ++++++++++ include/uapi/linux/if_link.h | 2 ++ net/core/dev.c | 22 +++++++++++++++++++++ net/core/rtnetlink.c | 38 ++++++++++++++++++++++++++++++++++++ 6 files changed, 112 insertions(+), 8 deletions(-) diff --git a/drivers/dpll/dpll_netlink.c b/drivers/dpll/dpll_netlink.c index 44d9699c9e6c..e6efc17aaf26 100644 --- a/drivers/dpll/dpll_netlink.c +++ b/drivers/dpll/dpll_netlink.c @@ -214,10 +214,9 @@ dpll_msg_add_pin_parents(struct sk_buff *msg, struct dpll_pin *pin, nest = nla_nest_start(msg, DPLL_A_PIN_PARENT); if (!nest) return -EMSGSIZE; - if (nla_put_u32(msg, DPLL_A_PIN_ID, ppin->id)) { - ret = -EMSGSIZE; + ret = dpll_msg_add_pin_handle(msg, ppin); + if (ret) goto nest_cancel; - } if (nla_put_u8(msg, DPLL_A_PIN_STATE, state)) { ret = -EMSGSIZE; goto nest_cancel; @@ -274,8 +273,9 @@ dpll_cmd_pin_fill_details(struct sk_buff *msg, struct dpll_pin *pin, const struct dpll_pin_properties *prop = pin->prop; int ret; - if (nla_put_u32(msg, DPLL_A_PIN_ID, pin->id)) - return -EMSGSIZE; + ret = dpll_msg_add_pin_handle(msg, pin); + if (ret) + return ret; if (nla_put_string(msg, DPLL_A_MODULE_NAME, module_name(pin->module))) return -EMSGSIZE; if (nla_put_64bit(msg, DPLL_A_CLOCK_ID, sizeof(pin->clock_id), @@ -301,6 +301,20 @@ dpll_cmd_pin_fill_details(struct sk_buff *msg, struct dpll_pin *pin, return 0; } +size_t dpll_msg_pin_handle_size(struct dpll_pin *pin) +{ + return nla_total_size(4); /* DPLL_A_PIN_ID */ +} +EXPORT_SYMBOL_GPL(dpll_msg_pin_handle_size); + +int dpll_msg_add_pin_handle(struct sk_buff *msg, struct dpll_pin *pin) +{ + if (nla_put_u32(msg, DPLL_A_PIN_ID, pin->id)) + return -EMSGSIZE; + return 0; +} +EXPORT_SYMBOL_GPL(dpll_msg_add_pin_handle); + static int __dpll_cmd_pin_dump_one(struct sk_buff *msg, struct dpll_pin *pin, struct netlink_ext_ack *extack) @@ -690,9 +704,7 @@ dpll_pin_find_from_nlattr(struct genl_info *info, struct sk_buff *skb) panel_label_attr, package_label_attr); if (!pin) return -EINVAL; - if (nla_put_u32(skb, DPLL_A_PIN_ID, pin->id)) - return -EMSGSIZE; - return 0; + return dpll_msg_add_pin_handle(skb, pin); } int dpll_nl_pin_id_get_doit(struct sk_buff *skb, struct genl_info *info) diff --git a/include/linux/dpll.h b/include/linux/dpll.h index a18bcaa13553..8d085dc92cdd 100644 --- a/include/linux/dpll.h +++ b/include/linux/dpll.h @@ -108,6 +108,26 @@ struct dpll_pin_properties { struct dpll_pin_frequency *freq_supported; }; +#if IS_ENABLED(CONFIG_DPLL) + +size_t dpll_msg_pin_handle_size(struct dpll_pin *pin); + +int dpll_msg_add_pin_handle(struct sk_buff *msg, struct dpll_pin *pin); + +#else + +static inline size_t dpll_msg_pin_handle_size(struct dpll_pin *pin) +{ + return 0; +} + +static inline int dpll_msg_add_pin_handle(struct sk_buff *msg, struct dpll_pin *pin) +{ + return 0; +} + +#endif + struct dpll_device *dpll_device_get(u64 clock_id, u32 dev_driver_id, struct module *module); diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 08fbd4622ccf..c57723b12f75 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -34,6 +34,7 @@ #include #include #include +#include #include #ifdef CONFIG_DCB @@ -2055,6 +2056,9 @@ enum netdev_ml_priv_type { * SET_NETDEV_DEVLINK_PORT macro. This pointer is static * during the time netdevice is registered. * + * @dpll_pin: Pointer to the SyncE source pin of a DPLL subsystem, + * where the clock is recovered. + * * FIXME: cleanup struct net_device such that network protocol info * moves out. */ @@ -2411,6 +2415,10 @@ struct net_device { struct rtnl_hw_stats64 *offload_xstats_l3; struct devlink_port *devlink_port; + +#if IS_ENABLED(CONFIG_DPLL) + struct dpll_pin *dpll_pin; +#endif }; #define to_net_dev(d) container_of(d, struct net_device, dev) @@ -3954,6 +3962,8 @@ int dev_get_mac_address(struct sockaddr *sa, struct net *net, char *dev_name); int dev_get_port_parent_id(struct net_device *dev, struct netdev_phys_item_id *ppid, bool recurse); bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b); +void netdev_dpll_pin_set(struct net_device *dev, struct dpll_pin *dpll_pin); +void netdev_dpll_pin_clear(struct net_device *dev); struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again); struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, struct netdev_queue *txq, int *ret); diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index 0f6a0fe09bdb..be03c8292cd7 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -377,6 +377,8 @@ enum { IFLA_GSO_IPV4_MAX_SIZE, IFLA_GRO_IPV4_MAX_SIZE, + IFLA_DPLL_PIN, + __IFLA_MAX }; diff --git a/net/core/dev.c b/net/core/dev.c index 99d99b247bc9..7ae0ce75a5c7 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -8993,6 +8993,28 @@ bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b) } EXPORT_SYMBOL(netdev_port_same_parent_id); +static void netdev_dpll_pin_assign(struct net_device *dev, struct dpll_pin *dpll_pin) +{ +#if IS_ENABLED(CONFIG_DPLL) + rtnl_lock(); + dev->dpll_pin = dpll_pin; + rtnl_unlock(); +#endif +} + +void netdev_dpll_pin_set(struct net_device *dev, struct dpll_pin *dpll_pin) +{ + WARN_ON(!dpll_pin); + netdev_dpll_pin_assign(dev, dpll_pin); +} +EXPORT_SYMBOL(netdev_dpll_pin_set); + +void netdev_dpll_pin_clear(struct net_device *dev) +{ + netdev_dpll_pin_assign(dev, NULL); +} +EXPORT_SYMBOL(netdev_dpll_pin_clear); + /** * dev_change_proto_down - set carrier according to proto_down. * diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 41de3a2f29e1..ebe9ae8608fc 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1052,6 +1052,16 @@ static size_t rtnl_devlink_port_size(const struct net_device *dev) return size; } +static size_t rtnl_dpll_pin_size(const struct net_device *dev) +{ + size_t size = nla_total_size(0); /* nest IFLA_DPLL_PIN */ + + if (dev->dpll_pin) + size += dpll_msg_pin_handle_size(dev->dpll_pin); + + return size; +} + static noinline size_t if_nlmsg_size(const struct net_device *dev, u32 ext_filter_mask) { @@ -1108,6 +1118,7 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev, + rtnl_prop_list_size(dev) + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */ + rtnl_devlink_port_size(dev) + + rtnl_dpll_pin_size(dev) + 0; } @@ -1769,6 +1780,30 @@ static int rtnl_fill_devlink_port(struct sk_buff *skb, return ret; } +static int rtnl_fill_dpll_pin(struct sk_buff *skb, + const struct net_device *dev) +{ + struct nlattr *dpll_pin_nest; + int ret; + + dpll_pin_nest = nla_nest_start(skb, IFLA_DPLL_PIN); + if (!dpll_pin_nest) + return -EMSGSIZE; + + if (dev->dpll_pin) { + ret = dpll_msg_add_pin_handle(skb, dev->dpll_pin); + if (ret < 0) + goto nest_cancel; + } + + nla_nest_end(skb, dpll_pin_nest); + return 0; + +nest_cancel: + nla_nest_cancel(skb, dpll_pin_nest); + return ret; +} + static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, struct net *src_net, int type, u32 pid, u32 seq, u32 change, @@ -1911,6 +1946,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, if (rtnl_fill_devlink_port(skb, dev)) goto nla_put_failure; + if (rtnl_fill_dpll_pin(skb, dev)) + goto nla_put_failure; + nlmsg_end(skb, nlh); return 0;