From patchwork Thu Dec 21 18:00:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502487 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9400F634F9; Thu, 21 Dec 2023 18:00:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="UGoakVxE" Received: by mail.gandi.net (Postfix) with ESMTPSA id 5FF0F1C000B; Thu, 21 Dec 2023 18:00:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181653; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=JKTpkJ6pIUUyWzdbY/c6gXFptNPtOL0v8uXIEg8Ejd0=; b=UGoakVxEG/vLnuvgV1eezDl4ns65G1qAw5bdginE6Y3s3mf4q+1CFch0+eKIKeCN114Xvb aDvN5WKYeDKbTV8I51yqIk1NO71Hf290Q8IE+IT+Fj4Ra5ZwZTnQ1mhBbDEk1lvktF5sR8 gRD5NClF1g8w/2TrFPWWedyUtuHJYFpCAXdyqVKkrbirBUs/dD98PPVYMDQ/VWTEi3+STm qXpo4z62C0w+72JdQPq1bm3Ul89ahz0CS1gtnmqO5JknVVD3887RC5MFAcT4dts7f12/Ft V/wxgZZcD30s7+gS7G9/AMD+N4xVXaPtWCw2BfnD8zUnpUbIHQaLQsnwbMQs9Q== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 01/13] net: phy: Introduce ethernet link topology representation Date: Thu, 21 Dec 2023 19:00:34 +0100 Message-ID: <20231221180047.1924733-2-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org Link topologies containing multiple network PHYs attached to the same net_device can be found when using a PHY as a media converter for use with an SFP connector, on which an SFP transceiver containing a PHY can be used. With the current model, the transceiver's PHY can't be used for operations such as cable testing, timestamping, macsec offload, etc. The reason being that most of the logic for these configuration, coming from either ethtool netlink or ioctls tend to use netdev->phydev, which in multi-phy systems will reference the PHY closest to the MAC. Introduce a numbering scheme allowing to enumerate PHY devices that belong to any netdev, which can in turn allow userspace to take more precise decisions with regard to each PHY's configuration. The numbering is maintained per-netdev, in a phy_device_list. The numbering works similarly to a netdevice's ifindex, with identifiers that are only recycled once INT_MAX has been reached. This prevents races that could occur between PHY listing and SFP transceiver removal/insertion. The identifiers are assigned at phy_attach time, as the numbering depends on the netdevice the phy is attached to. Signed-off-by: Maxime Chevallier --- V5: - Dropped the ASSERT_RTNL() - Made the phy_link_topo_get_phy inline V4: - Moved the phy_link_topo_init() code to an inline header function - Made the code build without phylib V3: - Renamed to phy_link_topology - Added assertions for RTNL - Various cleanups of leftover, unused test code - Made the PHY index u32 MAINTAINERS | 2 + drivers/net/phy/Makefile | 2 +- drivers/net/phy/phy_device.c | 7 +++ drivers/net/phy/phy_link_topology.c | 66 +++++++++++++++++++++++++ include/linux/netdevice.h | 4 +- include/linux/phy.h | 4 ++ include/linux/phy_link_topology.h | 67 ++++++++++++++++++++++++++ include/linux/phy_link_topology_core.h | 19 ++++++++ include/uapi/linux/ethtool.h | 16 ++++++ net/core/dev.c | 3 ++ 10 files changed, 188 insertions(+), 2 deletions(-) create mode 100644 drivers/net/phy/phy_link_topology.c create mode 100644 include/linux/phy_link_topology.h create mode 100644 include/linux/phy_link_topology_core.h diff --git a/MAINTAINERS b/MAINTAINERS index dda78b4ce707..f09b1d4e5487 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7873,6 +7873,8 @@ F: include/linux/mii.h F: include/linux/of_net.h F: include/linux/phy.h F: include/linux/phy_fixed.h +F: include/linux/phy_link_topology.h +F: include/linux/phy_link_topology_core.h F: include/linux/phylib_stubs.h F: include/linux/platform_data/mdio-bcm-unimac.h F: include/linux/platform_data/mdio-gpio.h diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index e35ea69d9cb4..a7a9640bfa3a 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -2,7 +2,7 @@ # Makefile for Linux PHY drivers libphy-y := phy.o phy-c45.o phy-core.o phy_device.o \ - linkmode.o + linkmode.o phy_link_topology.o mdio-bus-y += mdio_bus.o mdio_device.o ifdef CONFIG_MDIO_DEVICE diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 0c52a9eff188..d7c0812bd107 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -29,6 +29,7 @@ #include #include #include +#include #include #include #include @@ -1491,6 +1492,11 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, if (phydev->sfp_bus_attached) dev->sfp_bus = phydev->sfp_bus; + + err = phy_link_topo_add_phy(&dev->link_topo, phydev, + PHY_UPSTREAM_MAC, dev); + if (err) + goto error; } /* Some Ethernet drivers try to connect to a PHY device before @@ -1819,6 +1825,7 @@ void phy_detach(struct phy_device *phydev) if (dev) { phydev->attached_dev->phydev = NULL; phydev->attached_dev = NULL; + phy_link_topo_del_phy(&dev->link_topo, phydev); } phydev->phylink = NULL; diff --git a/drivers/net/phy/phy_link_topology.c b/drivers/net/phy/phy_link_topology.c new file mode 100644 index 000000000000..34e7e08fbfc3 --- /dev/null +++ b/drivers/net/phy/phy_link_topology.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Infrastructure to handle all PHY devices connected to a given netdev, + * either directly or indirectly attached. + * + * Copyright (c) 2023 Maxime Chevallier + */ + +#include +#include +#include +#include +#include + +int phy_link_topo_add_phy(struct phy_link_topology *topo, + struct phy_device *phy, + enum phy_upstream upt, void *upstream) +{ + struct phy_device_node *pdn; + int ret; + + pdn = kzalloc(sizeof(*pdn), GFP_KERNEL); + if (!pdn) + return -ENOMEM; + + pdn->phy = phy; + switch (upt) { + case PHY_UPSTREAM_MAC: + pdn->upstream.netdev = (struct net_device *)upstream; + if (phy_on_sfp(phy)) + pdn->parent_sfp_bus = pdn->upstream.netdev->sfp_bus; + break; + case PHY_UPSTREAM_PHY: + pdn->upstream.phydev = (struct phy_device *)upstream; + if (phy_on_sfp(phy)) + pdn->parent_sfp_bus = pdn->upstream.phydev->sfp_bus; + break; + default: + ret = -EINVAL; + goto err; + } + pdn->upstream_type = upt; + + ret = xa_alloc_cyclic(&topo->phys, &phy->phyindex, pdn, xa_limit_32b, + &topo->next_phy_index, GFP_KERNEL); + if (ret) + goto err; + + return 0; + +err: + kfree(pdn); + return ret; +} +EXPORT_SYMBOL_GPL(phy_link_topo_add_phy); + +void phy_link_topo_del_phy(struct phy_link_topology *topo, + struct phy_device *phy) +{ + struct phy_device_node *pdn = xa_erase(&topo->phys, phy->phyindex); + + phy->phyindex = 0; + + kfree(pdn); +} +EXPORT_SYMBOL_GPL(phy_link_topo_del_phy); diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 75c7725e5e4f..5baa5517f533 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -40,7 +40,6 @@ #include #endif #include - #include #include #include @@ -52,6 +51,7 @@ #include #include #include +#include struct netpoll_info; struct device; @@ -2047,6 +2047,7 @@ enum netdev_stat_type { * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp * * @priomap: XXX: need comments on this one + * @link_topo: Physical link topology tracking attached PHYs * @phydev: Physical device may attach itself * for hardware timestamping * @sfp_bus: attached &struct sfp_bus structure. @@ -2441,6 +2442,7 @@ struct net_device { #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) struct netprio_map __rcu *priomap; #endif + struct phy_link_topology link_topo; struct phy_device *phydev; struct sfp_bus *sfp_bus; struct lock_class_key *qdisc_tx_busylock; diff --git a/include/linux/phy.h b/include/linux/phy.h index e9e85d347587..9f21eb380475 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -544,6 +544,9 @@ struct macsec_ops; * @drv: Pointer to the driver for this PHY instance * @devlink: Create a link between phy dev and mac dev, if the external phy * used by current mac interface is managed by another mac interface. + * @phyindex: Unique id across the phy's parent tree of phys to address the PHY + * from userspace, similar to ifindex. A zero index means the PHY + * wasn't assigned an id yet. * @phy_id: UID for this device found during discovery * @c45_ids: 802.3-c45 Device Identifiers if is_c45. * @is_c45: Set to true if this PHY uses clause 45 addressing. @@ -643,6 +646,7 @@ struct phy_device { struct device_link *devlink; + u32 phyindex; u32 phy_id; struct phy_c45_device_ids c45_ids; diff --git a/include/linux/phy_link_topology.h b/include/linux/phy_link_topology.h new file mode 100644 index 000000000000..91902263ec0e --- /dev/null +++ b/include/linux/phy_link_topology.h @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * PHY device list allow maintaining a list of PHY devices that are + * part of a netdevice's link topology. PHYs can for example be chained, + * as is the case when using a PHY that exposes an SFP module, on which an + * SFP transceiver that embeds a PHY is connected. + * + * This list can then be used by userspace to leverage individual PHY + * capabilities. + */ +#ifndef __PHY_LINK_TOPOLOGY_H +#define __PHY_LINK_TOPOLOGY_H + +#include +#include + +struct xarray; +struct phy_device; +struct net_device; +struct sfp_bus; + +struct phy_device_node { + enum phy_upstream upstream_type; + + union { + struct net_device *netdev; + struct phy_device *phydev; + } upstream; + + struct sfp_bus *parent_sfp_bus; + + struct phy_device *phy; +}; + +static inline struct phy_device * +phy_link_topo_get_phy(struct phy_link_topology *topo, u32 phyindex) +{ + struct phy_device_node *pdn = xa_load(&topo->phys, phyindex); + + if (pdn) + return pdn->phy; + + return NULL; +} + +#if IS_ENABLED(CONFIG_PHYLIB) +int phy_link_topo_add_phy(struct phy_link_topology *topo, + struct phy_device *phy, + enum phy_upstream upt, void *upstream); + +void phy_link_topo_del_phy(struct phy_link_topology *lt, struct phy_device *phy); + +#else +static inline int phy_link_topo_add_phy(struct phy_link_topology *topo, + struct phy_device *phy, + enum phy_upstream upt, void *upstream) +{ + return 0; +} + +static inline void phy_link_topo_del_phy(struct phy_link_topology *topo, + struct phy_device *phy) +{ +} +#endif + +#endif /* __PHY_LINK_TOPOLOGY_H */ diff --git a/include/linux/phy_link_topology_core.h b/include/linux/phy_link_topology_core.h new file mode 100644 index 000000000000..78c75f909489 --- /dev/null +++ b/include/linux/phy_link_topology_core.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __PHY_LINK_TOPOLOGY_CORE_H +#define __PHY_LINK_TOPOLOGY_CORE_H + +struct xarray; + +struct phy_link_topology { + struct xarray phys; + + u32 next_phy_index; +}; + +static inline void phy_link_topo_init(struct phy_link_topology *topo) +{ + xa_init_flags(&topo->phys, XA_FLAGS_ALLOC1); + topo->next_phy_index = 1; +} + +#endif /* __PHY_LINK_TOPOLOGY_CORE_H */ diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index 0787d561ace0..9cff798c6df9 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -2216,4 +2216,20 @@ struct ethtool_link_settings { * __u32 map_lp_advertising[link_mode_masks_nwords]; */ }; + +/** + * enum phy_upstream - Represents the upstream component a given PHY device + * is connected to, as in what is on the other end of the MII bus. Most PHYs + * will be attached to an Ethernet MAC controller, but in some cases, there's + * an intermediate PHY used as a media-converter, which will driver another + * MII interface as its output. + * @PHY_UPSTREAM_MAC: Upstream component is a MAC (a switch port, + * or ethernet controller) + * @PHY_UPSTREAM_PHY: Upstream component is a PHY (likely a media converter) + */ +enum phy_upstream { + PHY_UPSTREAM_MAC, + PHY_UPSTREAM_PHY, +}; + #endif /* _UAPI_LINUX_ETHTOOL_H */ diff --git a/net/core/dev.c b/net/core/dev.c index b87504078320..476acd22956c 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -153,6 +153,7 @@ #include #include #include +#include #include "dev.h" #include "net-sysfs.h" @@ -10872,6 +10873,8 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, #ifdef CONFIG_NET_SCHED hash_init(dev->qdisc_hash); #endif + phy_link_topo_init(&dev->link_topo); + dev->priv_flags = IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM; setup(dev); From patchwork Thu Dec 21 18:00:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502488 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C334A6350B; Thu, 21 Dec 2023 18:00:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="No+OfNxH" Received: by mail.gandi.net (Postfix) with ESMTPSA id AEFF81C0007; Thu, 21 Dec 2023 18:00:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181654; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xPqx0OEQXus59iwv9XtKV+tNtHOhTw4nBV+Sv6aVjh4=; b=No+OfNxHY0T2RxpPgajCLss61f/DIaYN/7ijdGBpDptoyp154Jn3PmBXmXHct5+YaUnr2N E9TKhvFu5aKfEADWcQudIb5mXlPM681kDP6dvNzed8uHIRjSi22NIFWniVnD44w1Qb3bcn Cz6l6GNDR4plwHnk5l5NwlcyZD4cU09L1tkEFUBeKIzZMVCvgZD+RR5cYRoNTExmt8VHOk 8VWLNPBei4Y4mLIjZ6BnocLVhp+llTJvbnH9bKl0ZlOVZA83kKuCor8UBznQdl3woK1iaj sUx6sxamtrkyoq95uTiENF/F1nZ1mrDyqyWBgHZjNTHfb0EnvNbnXeGEJ3sIgw== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 02/13] net: sfp: pass the phy_device when disconnecting an sfp module's PHY Date: Thu, 21 Dec 2023 19:00:35 +0100 Message-ID: <20231221180047.1924733-3-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org Pass the phy_device as a parameter to the sfp upstream .disconnect_phy operation. This is preparatory work to help track phy devices across a net_device's link. Signed-off-by: Maxime Chevallier --- V5: No changes V4: No changes V3: No changes drivers/net/phy/phy_device.c | 8 ++++++++ drivers/net/phy/phylink.c | 3 ++- drivers/net/phy/sfp-bus.c | 4 ++-- include/linux/sfp.h | 2 +- 4 files changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index d7c0812bd107..aad78e3f7894 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -266,6 +266,14 @@ static void phy_mdio_device_remove(struct mdio_device *mdiodev) static struct phy_driver genphy_driver; +static struct phy_link_topology *phy_get_link_topology(struct phy_device *phydev) +{ + if (phydev->attached_dev) + return &phydev->attached_dev->link_topo; + + return NULL; +} + static LIST_HEAD(phy_fixup_list); static DEFINE_MUTEX(phy_fixup_lock); diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 298dfd6982a5..3d25a4a6212b 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -3319,7 +3319,8 @@ static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) return ret; } -static void phylink_sfp_disconnect_phy(void *upstream) +static void phylink_sfp_disconnect_phy(void *upstream, + struct phy_device *phydev) { phylink_disconnect_phy(upstream); } diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c index 6fa679b36290..3a86c41e1235 100644 --- a/drivers/net/phy/sfp-bus.c +++ b/drivers/net/phy/sfp-bus.c @@ -486,7 +486,7 @@ static void sfp_unregister_bus(struct sfp_bus *bus) bus->socket_ops->stop(bus->sfp); bus->socket_ops->detach(bus->sfp); if (bus->phydev && ops && ops->disconnect_phy) - ops->disconnect_phy(bus->upstream); + ops->disconnect_phy(bus->upstream, bus->phydev); } bus->registered = false; } @@ -742,7 +742,7 @@ void sfp_remove_phy(struct sfp_bus *bus) const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus); if (ops && ops->disconnect_phy) - ops->disconnect_phy(bus->upstream); + ops->disconnect_phy(bus->upstream, bus->phydev); bus->phydev = NULL; } EXPORT_SYMBOL_GPL(sfp_remove_phy); diff --git a/include/linux/sfp.h b/include/linux/sfp.h index 9346cd44814d..0573e53b0c11 100644 --- a/include/linux/sfp.h +++ b/include/linux/sfp.h @@ -544,7 +544,7 @@ struct sfp_upstream_ops { void (*link_down)(void *priv); void (*link_up)(void *priv); int (*connect_phy)(void *priv, struct phy_device *); - void (*disconnect_phy)(void *priv); + void (*disconnect_phy)(void *priv, struct phy_device *); }; #if IS_ENABLED(CONFIG_SFP) From patchwork Thu Dec 21 18:00:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502489 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0080863516; Thu, 21 Dec 2023 18:00:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="Io5ZnaGn" Received: by mail.gandi.net (Postfix) with ESMTPSA id E7B421C0008; Thu, 21 Dec 2023 18:00:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181656; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=y5N5WzUd2S/X/9BffbusO0YmcdoD10S4ae7/rzIWNrc=; b=Io5ZnaGnjwvgHpKbhe8/bZMhNRMuVE7+Gw3g+tTjXNHPUkAKKfDWF8R+nZryT0z7scDXNy G7+88jZDQwCmiZxBnFvdWMFFtoDmuYAnv54MIWI/sPA5AQxxP+dDgRJpVE1n6ffLNm1Nbp HUqRP2sI1D8f/mEb2SoArdpvYr+oSUj9bHJambckTmq9bDYjGR0iVwugKEdoLN4HdkrD3V LlvmSZ0FV4cRRWTNxVXtEEyBAD0DQPRim88bkyYmYwpVr9k3kjxy5dyeXSDnWuPG+ThZ1k lVEVW4zgDHdcgPl9aC3AfRPiHY651LFM3oJ5DpCppa0AwAjkq4+yE+c0aSLfzA== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 03/13] net: phy: add helpers to handle sfp phy connect/disconnect Date: Thu, 21 Dec 2023 19:00:36 +0100 Message-ID: <20231221180047.1924733-4-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org There are a few PHY drivers that can handle SFP modules through their sfp_upstream_ops. Introduce Phylib helpers to keep track of connected SFP PHYs in a netdevice's namespace, by adding the SFP PHY to the upstream PHY's netdev's namespace. By doing so, these SFP PHYs can be enumerated and exposed to users, which will be able to use their capabilities. Signed-off-by: Maxime Chevallier --- V5: No Changes V4: Rebased the at803x part with the newer version on net-next V3: Renaming V2: Renaming drivers/net/phy/at803x.c | 2 ++ drivers/net/phy/marvell-88x2222.c | 2 ++ drivers/net/phy/marvell.c | 2 ++ drivers/net/phy/marvell10g.c | 2 ++ drivers/net/phy/phy_device.c | 40 +++++++++++++++++++++++++++++++ include/linux/phy.h | 2 ++ 6 files changed, 50 insertions(+) diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index d5dc927618ab..1a62f868ec40 100644 --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -1452,6 +1452,8 @@ static const struct sfp_upstream_ops at8031_sfp_ops = { .attach = phy_sfp_attach, .detach = phy_sfp_detach, .module_insert = at8031_sfp_insert, + .connect_phy = phy_sfp_connect_phy, + .disconnect_phy = phy_sfp_disconnect_phy, }; static int at8031_parse_dt(struct phy_device *phydev) diff --git a/drivers/net/phy/marvell-88x2222.c b/drivers/net/phy/marvell-88x2222.c index e3aa30dad2e6..3f77bbc7e04f 100644 --- a/drivers/net/phy/marvell-88x2222.c +++ b/drivers/net/phy/marvell-88x2222.c @@ -555,6 +555,8 @@ static const struct sfp_upstream_ops sfp_phy_ops = { .link_down = mv2222_sfp_link_down, .attach = phy_sfp_attach, .detach = phy_sfp_detach, + .connect_phy = phy_sfp_connect_phy, + .disconnect_phy = phy_sfp_disconnect_phy, }; static int mv2222_probe(struct phy_device *phydev) diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c index eba652a4c1d8..674e29bce2cc 100644 --- a/drivers/net/phy/marvell.c +++ b/drivers/net/phy/marvell.c @@ -3254,6 +3254,8 @@ static const struct sfp_upstream_ops m88e1510_sfp_ops = { .module_remove = m88e1510_sfp_remove, .attach = phy_sfp_attach, .detach = phy_sfp_detach, + .connect_phy = phy_sfp_connect_phy, + .disconnect_phy = phy_sfp_disconnect_phy, }; static int m88e1510_probe(struct phy_device *phydev) diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c index ad43e280930c..6642eb642d4b 100644 --- a/drivers/net/phy/marvell10g.c +++ b/drivers/net/phy/marvell10g.c @@ -503,6 +503,8 @@ static int mv3310_sfp_insert(void *upstream, const struct sfp_eeprom_id *id) static const struct sfp_upstream_ops mv3310_sfp_ops = { .attach = phy_sfp_attach, .detach = phy_sfp_detach, + .connect_phy = phy_sfp_connect_phy, + .disconnect_phy = phy_sfp_disconnect_phy, .module_insert = mv3310_sfp_insert, }; diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index aad78e3f7894..6a7a05802bc6 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1363,6 +1363,46 @@ phy_standalone_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(phy_standalone); +/** + * phy_sfp_connect_phy - Connect the SFP module's PHY to the upstream PHY + * @upstream: pointer to the upstream phy device + * @phy: pointer to the SFP module's phy device + * + * This helper allows keeping track of PHY devices on the link. It adds the + * SFP module's phy to the phy namespace of the upstream phy + */ +int phy_sfp_connect_phy(void *upstream, struct phy_device *phy) +{ + struct phy_device *phydev = upstream; + struct phy_link_topology *topo = phy_get_link_topology(phydev); + + if (topo) + return phy_link_topo_add_phy(topo, phy, PHY_UPSTREAM_PHY, phydev); + + return 0; +} +EXPORT_SYMBOL(phy_sfp_connect_phy); + +/** + * phy_sfp_disconnect_phy - Disconnect the SFP module's PHY from the upstream PHY + * @upstream: pointer to the upstream phy device + * @phy: pointer to the SFP module's phy device + * + * This helper allows keeping track of PHY devices on the link. It removes the + * SFP module's phy to the phy namespace of the upstream phy. As the module phy + * will be destroyed, re-inserting the same module will add a new phy with a + * new index. + */ +void phy_sfp_disconnect_phy(void *upstream, struct phy_device *phy) +{ + struct phy_device *phydev = upstream; + struct phy_link_topology *topo = phy_get_link_topology(phydev); + + if (topo) + phy_link_topo_del_phy(topo, phy); +} +EXPORT_SYMBOL(phy_sfp_disconnect_phy); + /** * phy_sfp_attach - attach the SFP bus to the PHY upstream network device * @upstream: pointer to the phy device diff --git a/include/linux/phy.h b/include/linux/phy.h index 9f21eb380475..6cb9d843aee9 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -1726,6 +1726,8 @@ int phy_suspend(struct phy_device *phydev); int phy_resume(struct phy_device *phydev); int __phy_resume(struct phy_device *phydev); int phy_loopback(struct phy_device *phydev, bool enable); +int phy_sfp_connect_phy(void *upstream, struct phy_device *phy); +void phy_sfp_disconnect_phy(void *upstream, struct phy_device *phy); void phy_sfp_attach(void *upstream, struct sfp_bus *bus); void phy_sfp_detach(void *upstream, struct sfp_bus *bus); int phy_sfp_probe(struct phy_device *phydev, From patchwork Thu Dec 21 18:00:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502490 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1E35064AA0; Thu, 21 Dec 2023 18:00:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="J31c6vCb" Received: by mail.gandi.net (Postfix) with ESMTPSA id 28CCE1C000C; Thu, 21 Dec 2023 18:00:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181657; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ITNuUCoNP4s99jBMgEvKjUP+EuwHLWosDtc700xOI2s=; b=J31c6vCbqoze4gmtIRgEynkkjwDAc0ukSww2JVl0+4eJuh6lSzN5FuI82RtvdR4qjZhfbd aL5cnQX5HHhom3E6qhvCdCRc+3jrT1gP0D514dRz0Ob9zOIXMG9fAYJO5rSu5oGwy5z0xO Q3CYN68+R62Ci/Ig7I8MwM9d7Xi0nkkIwUWE6r88yaA0UL/lWJutyDUH0B8NzU78lAzUdb cubYDLSq8/o3aCQ7LguceB0zXqOXxk7jd5ylYJ+2zAUUfOJuxSx+FCECFN4Po0mOR/OQrZ Jm/09zgQlmypxMv+kWBA/J8UdPBAf5cgj9+7ZC1ftCDGUFceVIKZaOPR7ayNdg== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 04/13] net: sfp: Add helper to return the SFP bus name Date: Thu, 21 Dec 2023 19:00:37 +0100 Message-ID: <20231221180047.1924733-5-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org Knowing the bus name is helpful when we want to expose the link topology to userspace, add a helper to return the SFP bus name. Signed-off-by: Maxime Chevallier Reviewed-by: Andrew Lunn --- V5: - Added Andrew's R-b V4: - No changes V3: - Added RTNL assert - Made the stub inline V2: New patch drivers/net/phy/sfp-bus.c | 11 +++++++++++ include/linux/sfp.h | 6 ++++++ 2 files changed, 17 insertions(+) diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c index 3a86c41e1235..fb1c102714b5 100644 --- a/drivers/net/phy/sfp-bus.c +++ b/drivers/net/phy/sfp-bus.c @@ -859,3 +859,14 @@ void sfp_unregister_socket(struct sfp_bus *bus) sfp_bus_put(bus); } EXPORT_SYMBOL_GPL(sfp_unregister_socket); + +const char *sfp_get_name(struct sfp_bus *bus) +{ + ASSERT_RTNL(); + + if (bus->sfp_dev) + return dev_name(bus->sfp_dev); + + return NULL; +} +EXPORT_SYMBOL_GPL(sfp_get_name); diff --git a/include/linux/sfp.h b/include/linux/sfp.h index 0573e53b0c11..55c0ab17c9e2 100644 --- a/include/linux/sfp.h +++ b/include/linux/sfp.h @@ -570,6 +570,7 @@ struct sfp_bus *sfp_bus_find_fwnode(const struct fwnode_handle *fwnode); int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream, const struct sfp_upstream_ops *ops); void sfp_bus_del_upstream(struct sfp_bus *bus); +const char *sfp_get_name(struct sfp_bus *bus); #else static inline int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id, @@ -648,6 +649,11 @@ static inline int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream, static inline void sfp_bus_del_upstream(struct sfp_bus *bus) { } + +static inline const char *sfp_get_name(struct sfp_bus *bus) +{ + return NULL; +} #endif #endif From patchwork Thu Dec 21 18:00:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502491 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 820EA65192; Thu, 21 Dec 2023 18:01:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="ROWF+iZx" Received: by mail.gandi.net (Postfix) with ESMTPSA id 6CFAC1C000D; Thu, 21 Dec 2023 18:00:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181658; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=WTUq7XThAixNYoy7FuSN1PPsQ5HUfW2P/MgBaY5NynY=; b=ROWF+iZxo2RQ6WAOWQ0b30DkrhW/LiGQPBnXdnrQjSP3Tm6bNbjxz5Wm8yn0MNLy2/KvRt YEtTPQnNpcekkfbj6rfcor4KrqTR5RHcOPXSuGgv6RenCBbhCUMHll/woKe0MwMDMqBWVu 8LBraI/3EZPthUWZnB3Kqq8SdP6CIfhDcTjAzVKnurbwhvs03C5fAJ8C/nDs0sqU0UbCh8 eV4nkNyGLMDXZIWeR2Z7pvCEIZMhUYP468SXsGaPIfVp06MJlmo/rIgqrm3iWOm3YtQIDe tnuZc8Aqr4hdaIRA8bL31wqNUKnwS2iN3QWybqWcVvICLnDv6BruUvcEhMBZFQ== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 05/13] net: ethtool: Allow passing a phy index for some commands Date: Thu, 21 Dec 2023 19:00:38 +0100 Message-ID: <20231221180047.1924733-6-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org Some netlink commands are target towards ethernet PHYs, to control some of their features. As there's several such commands, add the ability to pass a PHY index in the ethnl request, which will populate the generic ethnl_req_info with the relevant phydev when the command targets a PHY. Signed-off-by: Maxime Chevallier Reviewed-by: Andrew Lunn --- V5: - Added Andrew's R-b - Fix a typo reported by Simon V4: - No Changes V3: - Fixed the documentation V2: - New patch Documentation/networking/ethtool-netlink.rst | 7 ++++++ include/uapi/linux/ethtool_netlink.h | 1 + net/ethtool/netlink.c | 24 ++++++++++++++++++++ net/ethtool/netlink.h | 7 ++++-- 4 files changed, 37 insertions(+), 2 deletions(-) diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index d583d9abf2f8..3ca6c21e74af 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -57,6 +57,7 @@ Structure of this header is ``ETHTOOL_A_HEADER_DEV_INDEX`` u32 device ifindex ``ETHTOOL_A_HEADER_DEV_NAME`` string device name ``ETHTOOL_A_HEADER_FLAGS`` u32 flags common for all requests + ``ETHTOOL_A_HEADER_PHY_INDEX`` u32 phy device index ============================== ====== ============================= ``ETHTOOL_A_HEADER_DEV_INDEX`` and ``ETHTOOL_A_HEADER_DEV_NAME`` identify the @@ -81,6 +82,12 @@ the behaviour is backward compatible, i.e. requests from old clients not aware of the flag should be interpreted the way the client expects. A client must not set flags it does not understand. +``ETHTOOL_A_HEADER_PHY_INDEX`` identify the ethernet PHY the message relates to. +As there are numerous commands that are related to PHY configuration, and because +we can have more than one PHY on the link, the PHY index can be passed in the +request for the commands that needs it. It is however not mandatory, and if it +is not passed for commands that target a PHY, the net_device.phydev pointer +is used, as a fallback that keeps the legacy behaviour. Bit sets ======== diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index 3f89074aa06c..422e8cfdd98c 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -133,6 +133,7 @@ enum { ETHTOOL_A_HEADER_DEV_INDEX, /* u32 */ ETHTOOL_A_HEADER_DEV_NAME, /* string */ ETHTOOL_A_HEADER_FLAGS, /* u32 - ETHTOOL_FLAG_* */ + ETHTOOL_A_HEADER_PHY_INDEX, /* u32 */ /* add new constants above here */ __ETHTOOL_A_HEADER_CNT, diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index fe3553f60bf3..1c26766ce996 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -4,6 +4,7 @@ #include #include #include "netlink.h" +#include static struct genl_family ethtool_genl_family; @@ -20,6 +21,7 @@ const struct nla_policy ethnl_header_policy[] = { .len = ALTIFNAMSIZ - 1 }, [ETHTOOL_A_HEADER_FLAGS] = NLA_POLICY_MASK(NLA_U32, ETHTOOL_FLAGS_BASIC), + [ETHTOOL_A_HEADER_PHY_INDEX] = NLA_POLICY_MIN(NLA_U32, 1), }; const struct nla_policy ethnl_header_policy_stats[] = { @@ -28,6 +30,7 @@ const struct nla_policy ethnl_header_policy_stats[] = { .len = ALTIFNAMSIZ - 1 }, [ETHTOOL_A_HEADER_FLAGS] = NLA_POLICY_MASK(NLA_U32, ETHTOOL_FLAGS_STATS), + [ETHTOOL_A_HEADER_PHY_INDEX] = NLA_POLICY_MIN(NLA_U32, 1), }; int ethnl_ops_begin(struct net_device *dev) @@ -91,6 +94,7 @@ int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info, { struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy)]; const struct nlattr *devname_attr; + struct phy_device *phydev = NULL; struct net_device *dev = NULL; u32 flags = 0; int ret; @@ -145,6 +149,26 @@ int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info, return -EINVAL; } + if (dev) { + if (tb[ETHTOOL_A_HEADER_PHY_INDEX]) { + u32 phy_index = nla_get_u32(tb[ETHTOOL_A_HEADER_PHY_INDEX]); + + phydev = phy_link_topo_get_phy(&dev->link_topo, + phy_index); + if (!phydev) { + NL_SET_ERR_MSG_ATTR(extack, header, + "no phy matches phy index"); + return -EINVAL; + } + } else { + /* If we need a PHY but no phy index is specified, fallback + * to dev->phydev + */ + phydev = dev->phydev; + } + } + + req_info->phydev = phydev; req_info->dev = dev; req_info->flags = flags; return 0; diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h index 9a333a8d04c1..def84e2def9e 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -250,6 +250,7 @@ static inline unsigned int ethnl_reply_header_size(void) * @dev: network device the request is for (may be null) * @dev_tracker: refcount tracker for @dev reference * @flags: request flags common for all request types + * @phydev: phy_device connected to @dev this request is for (may be null) * * This is a common base for request specific structures holding data from * parsed userspace request. These always embed struct ethnl_req_info at @@ -259,6 +260,7 @@ struct ethnl_req_info { struct net_device *dev; netdevice_tracker dev_tracker; u32 flags; + struct phy_device *phydev; }; static inline void ethnl_parse_header_dev_put(struct ethnl_req_info *req_info) @@ -395,9 +397,10 @@ extern const struct ethnl_request_ops ethnl_rss_request_ops; extern const struct ethnl_request_ops ethnl_plca_cfg_request_ops; extern const struct ethnl_request_ops ethnl_plca_status_request_ops; extern const struct ethnl_request_ops ethnl_mm_request_ops; +extern const struct ethnl_request_ops ethnl_phy_request_ops; -extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1]; -extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_FLAGS + 1]; +extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_PHY_INDEX + 1]; +extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_PHY_INDEX + 1]; extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_COUNTS_ONLY + 1]; extern const struct nla_policy ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_HEADER + 1]; extern const struct nla_policy ethnl_linkinfo_set_policy[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL + 1]; From patchwork Thu Dec 21 18:00:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502492 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5EDFC6EB63; Thu, 21 Dec 2023 18:01:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="kVDlQce7" Received: by mail.gandi.net (Postfix) with ESMTPSA id B12DB1C000E; Thu, 21 Dec 2023 18:00:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181659; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=MdJWImCQJ1m/KrG/6TN8XupS4VHpoUJ+SRO2wKb8JX4=; b=kVDlQce7t47hS6xkdauzdd2Fh3KujCZPNTFT87B6wi0T3RjCduHNc/e44/BDEXTCpvr+hC ic5SM/Rgb+7mysIqag1oOZ8Uy31LcgELTr6BSf2pyRZFUq4bvOqMSu9Qvl3H3s4sTbDMtB 27iIg2XrTaX2Jv7kda1wkxM7j6pWH4NBpQgoiZXjHzqRBGP1pZGSLsvnyl/no35+D0kZQ2 O2bMGx/qODlloJzzFAmWA2PqHwd7lV50pGazP7s0jK9C5AkK87FdeuGt1etvWZqDgiTkF8 tIkoVUaVO9hmIdiCaHXDCPZf5HeGcS97iut5dYCRPcaouVWtCAG8amMVOwNxAw== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 06/13] netlink: specs: add phy-index as a header parameter Date: Thu, 21 Dec 2023 19:00:39 +0100 Message-ID: <20231221180047.1924733-7-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org Update the spec to take the newly introduced phy-index as a generic request parameter. Signed-off-by: Maxime Chevallier Reviewed-by: Andrew Lunn --- V5: Added Andrew's R-b V4: Ditch the ethtool-user generated code V3: New patch Documentation/netlink/specs/ethtool.yaml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/netlink/specs/ethtool.yaml b/Documentation/netlink/specs/ethtool.yaml index 197208f419dc..bb6e1dc6d1c5 100644 --- a/Documentation/netlink/specs/ethtool.yaml +++ b/Documentation/netlink/specs/ethtool.yaml @@ -30,6 +30,9 @@ attribute-sets: - name: flags type: u32 + - + name: phy-index + type: u32 - name: bitset-bit From patchwork Thu Dec 21 18:00:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502493 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D9C6074E00; Thu, 21 Dec 2023 18:01:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="W/UiYEOY" Received: by mail.gandi.net (Postfix) with ESMTPSA id 00D301C000F; Thu, 21 Dec 2023 18:00:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181661; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=q4AeVMNo1LN3RCr8IplrTzCGX2Ey6rhnsXThym/pmFA=; b=W/UiYEOY7vYCfN7BpbyyxFGjYW1dfdyN/O7FJSDC/7D4GdWLpMSWeUnKRXGaMrN7KRoWv0 iCMidFM2HRfIK/7HzsS2wO2YIxuc+QTVFJOgTwULy6LUMRrNvsqxi5KX2SDjeQuID86vY0 9MX7eAQ5pBIycnFAjsNw0c7QPICKzkx3xIseNasuJvQUotnQOWWPjoBDrPyglYiD+iDZex mi4BDDljq6CXOv87p5h22jBdznpnIIk1pu3CD96VqGwrmXiPSm8zssSAWPAQWqzndFTVDu RT9nEMf5LlK3TaW6ObNWocqFmpARe9ICDlDuqiw+L0JoDIqY6nnMiMNmVy0+JQ== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 07/13] net: ethtool: Introduce a command to list PHYs on an interface Date: Thu, 21 Dec 2023 19:00:40 +0100 Message-ID: <20231221180047.1924733-8-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org As we have the ability to track the PHYs connected to a net_device through the link_topology, we can expose this list to userspace. This allows userspace to use these identifiers for phy-specific commands and take the decision of which PHY to target by knowing the link topology. Add PHY_GET and PHY_DUMP, which can be a filtered DUMP operation to list devices on only one interface. Signed-off-by: Maxime Chevallier --- V5: - Fixed xmas tree - Fixed uninitialized return variable (Simon) V4: - Fixed errors when not having SFP enabled, resulting in null names being passed as parameters to strlen. V3: - Fixed the documentation - Fixed the DUMP implementation V2: New patch Documentation/networking/ethtool-netlink.rst | 44 +++ include/uapi/linux/ethtool_netlink.h | 29 ++ net/ethtool/Makefile | 2 +- net/ethtool/netlink.c | 9 + net/ethtool/netlink.h | 5 + net/ethtool/phy.c | 306 +++++++++++++++++++ 6 files changed, 394 insertions(+), 1 deletion(-) create mode 100644 net/ethtool/phy.c diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index 3ca6c21e74af..97ff787a7dd8 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -2011,6 +2011,49 @@ The attributes are propagated to the driver through the following structure: .. kernel-doc:: include/linux/ethtool.h :identifiers: ethtool_mm_cfg +PHY_GET +======= + +Retrieve information about a given Ethernet PHY sitting on the link. As there +can be more than one PHY, the DUMP operation can be used to list the PHYs +present on a given interface, by passing an interface index or name in +the dump request + +Request contents: + + ==================================== ====== ========================== + ``ETHTOOL_A_PHY_HEADER`` nested request header + ==================================== ====== ========================== + +Kernel response contents: + + ===================================== ====== ========================== + ``ETHTOOL_A_PHY_HEADER`` nested request header + ``ETHTOOL_A_PHY_INDEX`` u32 the phy's unique index, that can + be used for phy-specific requests + ``ETHTOOL_A_PHY_DRVNAME`` string the phy driver name + ``ETHTOOL_A_PHY_NAME`` string the phy device name + ``ETHTOOL_A_PHY_UPSTREAM_TYPE`` u32 the type of device this phy is + connected to + ``ETHTOOL_A_PHY_UPSTREAM_PHY`` nested if the phy is connected to another + phy, this nest contains info on + that connection + ``ETHTOOL_A_PHY_DOWNSTREAM_SFP_NAME`` string if the phy controls an sfp bus, + the name of the sfp bus + ``ETHTOOL_A_PHY_ID`` u32 the phy id if the phy is C22 + ===================================== ====== ========================== + +When ``ETHTOOL_A_PHY_UPSTREAM_TYPE`` is PHY_UPSTREAM_PHY, the PHY's parent is +another PHY. Information on the parent PHY will be set in the +``ETHTOOL_A_PHY_UPSTREAM_PHY`` nest, which has the following structure : + + =================================== ====== ========================== + ``ETHTOOL_A_PHY_UPSTREAM_INDEX`` u32 the PHY index of the upstream PHY + ``ETHTOOL_A_PHY_UPSTREAM_SFP_NAME`` string if this PHY is connected to it's + parent PHY through an SFP bus, the + name of this sfp bus + =================================== ====== ========================== + Request translation =================== @@ -2117,4 +2160,5 @@ are netlink only. n/a ``ETHTOOL_MSG_PLCA_GET_STATUS`` n/a ``ETHTOOL_MSG_MM_GET`` n/a ``ETHTOOL_MSG_MM_SET`` + n/a ``ETHTOOL_MSG_PHY_GET`` =================================== ===================================== diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index 422e8cfdd98c..00cd7ad16709 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -57,6 +57,7 @@ enum { ETHTOOL_MSG_PLCA_GET_STATUS, ETHTOOL_MSG_MM_GET, ETHTOOL_MSG_MM_SET, + ETHTOOL_MSG_PHY_GET, /* add new constants above here */ __ETHTOOL_MSG_USER_CNT, @@ -109,6 +110,8 @@ enum { ETHTOOL_MSG_PLCA_NTF, ETHTOOL_MSG_MM_GET_REPLY, ETHTOOL_MSG_MM_NTF, + ETHTOOL_MSG_PHY_GET_REPLY, + ETHTOOL_MSG_PHY_NTF, /* add new constants above here */ __ETHTOOL_MSG_KERNEL_CNT, @@ -977,6 +980,32 @@ enum { ETHTOOL_A_MM_MAX = (__ETHTOOL_A_MM_CNT - 1) }; +enum { + ETHTOOL_A_PHY_UPSTREAM_UNSPEC, + ETHTOOL_A_PHY_UPSTREAM_INDEX, /* u32 */ + ETHTOOL_A_PHY_UPSTREAM_SFP_NAME, /* string */ + + /* add new constants above here */ + __ETHTOOL_A_PHY_UPSTREAM_CNT, + ETHTOOL_A_PHY_UPSTREAM_MAX = (__ETHTOOL_A_PHY_UPSTREAM_CNT - 1) +}; + +enum { + ETHTOOL_A_PHY_UNSPEC, + ETHTOOL_A_PHY_HEADER, /* nest - _A_HEADER_* */ + ETHTOOL_A_PHY_INDEX, /* u32 */ + ETHTOOL_A_PHY_DRVNAME, /* string */ + ETHTOOL_A_PHY_NAME, /* string */ + ETHTOOL_A_PHY_UPSTREAM_TYPE, /* u8 */ + ETHTOOL_A_PHY_UPSTREAM, /* nest - _A_PHY_UPSTREAM_* */ + ETHTOOL_A_PHY_DOWNSTREAM_SFP_NAME, /* string */ + ETHTOOL_A_PHY_ID, /* u32 */ + + /* add new constants above here */ + __ETHTOOL_A_PHY_CNT, + ETHTOOL_A_PHY_MAX = (__ETHTOOL_A_PHY_CNT - 1) +}; + /* generic netlink info */ #define ETHTOOL_GENL_NAME "ethtool" #define ETHTOOL_GENL_VERSION 1 diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile index 504f954a1b28..0ccd0e9afd3f 100644 --- a/net/ethtool/Makefile +++ b/net/ethtool/Makefile @@ -8,4 +8,4 @@ ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o rss.o \ linkstate.o debug.o wol.o features.o privflags.o rings.o \ channels.o coalesce.o pause.o eee.o tsinfo.o cabletest.o \ tunnels.o fec.o eeprom.o stats.o phc_vclocks.o mm.o \ - module.o pse-pd.o plca.o mm.o + module.o pse-pd.o plca.o mm.o phy.o diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index 1c26766ce996..92b0dd8ca046 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -1153,6 +1153,15 @@ static const struct genl_ops ethtool_genl_ops[] = { .policy = ethnl_mm_set_policy, .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1, }, + { + .cmd = ETHTOOL_MSG_PHY_GET, + .doit = ethnl_phy_doit, + .start = ethnl_phy_start, + .dumpit = ethnl_phy_dumpit, + .done = ethnl_phy_done, + .policy = ethnl_phy_get_policy, + .maxattr = ARRAY_SIZE(ethnl_phy_get_policy) - 1, + }, }; static const struct genl_multicast_group ethtool_nl_mcgrps[] = { diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h index def84e2def9e..5e6a43e35a09 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -444,6 +444,7 @@ extern const struct nla_policy ethnl_plca_set_cfg_policy[ETHTOOL_A_PLCA_MAX + 1] extern const struct nla_policy ethnl_plca_get_status_policy[ETHTOOL_A_PLCA_HEADER + 1]; extern const struct nla_policy ethnl_mm_get_policy[ETHTOOL_A_MM_HEADER + 1]; extern const struct nla_policy ethnl_mm_set_policy[ETHTOOL_A_MM_MAX + 1]; +extern const struct nla_policy ethnl_phy_get_policy[ETHTOOL_A_PHY_HEADER + 1]; int ethnl_set_features(struct sk_buff *skb, struct genl_info *info); int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info); @@ -451,6 +452,10 @@ int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info); int ethnl_tunnel_info_doit(struct sk_buff *skb, struct genl_info *info); int ethnl_tunnel_info_start(struct netlink_callback *cb); int ethnl_tunnel_info_dumpit(struct sk_buff *skb, struct netlink_callback *cb); +int ethnl_phy_start(struct netlink_callback *cb); +int ethnl_phy_doit(struct sk_buff *skb, struct genl_info *info); +int ethnl_phy_dumpit(struct sk_buff *skb, struct netlink_callback *cb); +int ethnl_phy_done(struct netlink_callback *cb); extern const char stats_std_names[__ETHTOOL_STATS_CNT][ETH_GSTRING_LEN]; extern const char stats_eth_phy_names[__ETHTOOL_A_STATS_ETH_PHY_CNT][ETH_GSTRING_LEN]; diff --git a/net/ethtool/phy.c b/net/ethtool/phy.c new file mode 100644 index 000000000000..5add2840aaeb --- /dev/null +++ b/net/ethtool/phy.c @@ -0,0 +1,306 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2023 Bootlin + * + */ +#include "common.h" +#include "netlink.h" + +#include +#include +#include + +struct phy_req_info { + struct ethnl_req_info base; + struct phy_device_node pdn; +}; + +#define PHY_REQINFO(__req_base) \ + container_of(__req_base, struct phy_req_info, base) + +const struct nla_policy ethnl_phy_get_policy[ETHTOOL_A_PHY_HEADER + 1] = { + [ETHTOOL_A_PHY_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), +}; + +/* Caller holds rtnl */ +static ssize_t +ethnl_phy_reply_size(const struct ethnl_req_info *req_base, + struct netlink_ext_ack *extack) +{ + struct phy_link_topology *topo; + struct phy_device_node *pdn; + struct phy_device *phydev; + unsigned long index; + size_t size; + + ASSERT_RTNL(); + + topo = &req_base->dev->link_topo; + + size = nla_total_size(0); + + xa_for_each(&topo->phys, index, pdn) { + phydev = pdn->phy; + + /* ETHTOOL_A_PHY_INDEX */ + size += nla_total_size(sizeof(u32)); + + /* ETHTOOL_A_DRVNAME */ + size += nla_total_size(strlen(phydev->drv->name) + 1); + + /* ETHTOOL_A_NAME */ + size += nla_total_size(strlen(dev_name(&phydev->mdio.dev)) + 1); + + /* ETHTOOL_A_PHY_UPSTREAM_TYPE */ + size += nla_total_size(sizeof(u8)); + + /* ETHTOOL_A_PHY_ID */ + size += nla_total_size(sizeof(u32)); + + if (phy_on_sfp(phydev)) { + const char *upstream_sfp_name = sfp_get_name(pdn->parent_sfp_bus); + + /* ETHTOOL_A_PHY_UPSTREAM_SFP_NAME */ + if (upstream_sfp_name) + size += nla_total_size(strlen(upstream_sfp_name) + 1); + + /* ETHTOOL_A_PHY_UPSTREAM_INDEX */ + size += nla_total_size(sizeof(u32)); + } + + /* ETHTOOL_A_PHY_DOWNSTREAM_SFP_NAME */ + if (phydev->sfp_bus) { + const char *sfp_name = sfp_get_name(phydev->sfp_bus); + + if (sfp_name) + size += nla_total_size(strlen(sfp_name) + 1); + } + } + + return size; +} + +static int +ethnl_phy_fill_reply(const struct ethnl_req_info *req_base, struct sk_buff *skb) +{ + struct phy_req_info *req_info = PHY_REQINFO(req_base); + struct phy_device_node *pdn = &req_info->pdn; + struct phy_device *phydev = pdn->phy; + enum phy_upstream ptype; + struct nlattr *nest; + + ptype = pdn->upstream_type; + + if (nla_put_u32(skb, ETHTOOL_A_PHY_INDEX, phydev->phyindex) || + nla_put_string(skb, ETHTOOL_A_PHY_DRVNAME, phydev->drv->name) || + nla_put_string(skb, ETHTOOL_A_PHY_NAME, dev_name(&phydev->mdio.dev)) || + nla_put_u8(skb, ETHTOOL_A_PHY_UPSTREAM_TYPE, ptype) || + nla_put_u32(skb, ETHTOOL_A_PHY_ID, phydev->phy_id)) + return -EMSGSIZE; + + if (ptype == PHY_UPSTREAM_PHY) { + struct phy_device *upstream = pdn->upstream.phydev; + const char *sfp_upstream_name; + + nest = nla_nest_start(skb, ETHTOOL_A_PHY_UPSTREAM); + if (!nest) + return -EMSGSIZE; + + /* Parent index */ + if (nla_put_u32(skb, ETHTOOL_A_PHY_UPSTREAM_INDEX, upstream->phyindex)) + return -EMSGSIZE; + + if (pdn->parent_sfp_bus) { + sfp_upstream_name = sfp_get_name(pdn->parent_sfp_bus); + if (sfp_upstream_name && nla_put_string(skb, + ETHTOOL_A_PHY_UPSTREAM_SFP_NAME, + sfp_upstream_name)) + return -EMSGSIZE; + } + + nla_nest_end(skb, nest); + } + + if (phydev->sfp_bus) { + const char *sfp_name = sfp_get_name(phydev->sfp_bus); + + if (sfp_name && + nla_put_string(skb, ETHTOOL_A_PHY_DOWNSTREAM_SFP_NAME, + sfp_name)) + return -EMSGSIZE; + } + + return 0; +} + +static int ethnl_phy_parse_request(struct ethnl_req_info *req_base, + struct nlattr **tb) +{ + struct phy_link_topology *topo = &req_base->dev->link_topo; + struct phy_req_info *req_info = PHY_REQINFO(req_base); + struct phy_device_node *pdn; + + if (!req_base->phydev) + return 0; + + pdn = xa_load(&topo->phys, req_base->phydev->phyindex); + memcpy(&req_info->pdn, pdn, sizeof(*pdn)); + + return 0; +} + +int ethnl_phy_doit(struct sk_buff *skb, struct genl_info *info) +{ + struct phy_req_info req_info = {}; + struct nlattr **tb = info->attrs; + struct sk_buff *rskb; + void *reply_payload; + int reply_len; + int ret; + + ret = ethnl_parse_header_dev_get(&req_info.base, + tb[ETHTOOL_A_PHY_HEADER], + genl_info_net(info), info->extack, + true); + if (ret < 0) + return ret; + + rtnl_lock(); + + ret = ethnl_phy_parse_request(&req_info.base, tb); + if (ret < 0) + goto err_unlock_rtnl; + + /* No PHY, return early */ + if (!req_info.pdn.phy) + goto err_unlock_rtnl; + + ret = ethnl_phy_reply_size(&req_info.base, info->extack); + if (ret < 0) + goto err_unlock_rtnl; + reply_len = ret + ethnl_reply_header_size(); + + rskb = ethnl_reply_init(reply_len, req_info.base.dev, + ETHTOOL_MSG_PHY_GET_REPLY, + ETHTOOL_A_PHY_HEADER, + info, &reply_payload); + if (!rskb) { + ret = -ENOMEM; + goto err_unlock_rtnl; + } + + ret = ethnl_phy_fill_reply(&req_info.base, rskb); + if (ret) + goto err_free_msg; + + rtnl_unlock(); + ethnl_parse_header_dev_put(&req_info.base); + genlmsg_end(rskb, reply_payload); + + return genlmsg_reply(rskb, info); + +err_free_msg: + nlmsg_free(rskb); +err_unlock_rtnl: + rtnl_unlock(); + ethnl_parse_header_dev_put(&req_info.base); + return ret; +} + +struct ethnl_phy_dump_ctx { + struct phy_req_info *phy_req_info; +}; + +int ethnl_phy_start(struct netlink_callback *cb) +{ + const struct genl_dumpit_info *info = genl_dumpit_info(cb); + struct ethnl_phy_dump_ctx *ctx = (void *)cb->ctx; + struct nlattr **tb = info->info.attrs; + int ret; + + BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); + + ctx->phy_req_info = kzalloc(sizeof(*ctx->phy_req_info), GFP_KERNEL); + if (!ctx->phy_req_info) + return -ENOMEM; + + ret = ethnl_parse_header_dev_get(&ctx->phy_req_info->base, + tb[ETHTOOL_A_PHY_HEADER], + sock_net(cb->skb->sk), cb->extack, + false); + return ret; +} + +int ethnl_phy_done(struct netlink_callback *cb) +{ + struct ethnl_phy_dump_ctx *ctx = (void *)cb->ctx; + + kfree(ctx->phy_req_info); + + return 0; +} + +static int ethnl_phy_dump_one_dev(struct sk_buff *skb, struct net_device *dev, + struct netlink_callback *cb) +{ + struct ethnl_phy_dump_ctx *ctx = (void *)cb->ctx; + struct phy_req_info *pri = ctx->phy_req_info; + struct phy_device_node *pdn; + unsigned long index = 1; + int ret = 0; + void *ehdr; + + pri->base.dev = dev; + + xa_for_each(&dev->link_topo.phys, index, pdn) { + ehdr = ethnl_dump_put(skb, cb, + ETHTOOL_MSG_PHY_GET_REPLY); + if (!ehdr) { + ret = -EMSGSIZE; + break; + } + + ret = ethnl_fill_reply_header(skb, dev, + ETHTOOL_A_PHY_HEADER); + if (ret < 0) { + genlmsg_cancel(skb, ehdr); + break; + } + + memcpy(&pri->pdn, pdn, sizeof(*pdn)); + ret = ethnl_phy_fill_reply(&pri->base, skb); + + genlmsg_end(skb, ehdr); + } + + return ret; +} + +int ethnl_phy_dumpit(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct ethnl_phy_dump_ctx *ctx = (void *)cb->ctx; + struct net *net = sock_net(skb->sk); + unsigned long ifindex = 1; + struct net_device *dev; + int ret = 0; + + rtnl_lock(); + + if (ctx->phy_req_info->base.dev) { + ret = ethnl_phy_dump_one_dev(skb, ctx->phy_req_info->base.dev, cb); + ethnl_parse_header_dev_put(&ctx->phy_req_info->base); + ctx->phy_req_info->base.dev = NULL; + } else { + for_each_netdev_dump(net, dev, ifindex) { + ret = ethnl_phy_dump_one_dev(skb, dev, cb); + if (ret) + break; + } + } + rtnl_unlock(); + + if (ret == -EMSGSIZE && skb->len) + return skb->len; + return ret; +} + From patchwork Thu Dec 21 18:00:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502494 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2F1DD76912; Thu, 21 Dec 2023 18:01:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="l3TJDEPe" Received: by mail.gandi.net (Postfix) with ESMTPSA id 4ED6A1C0010; Thu, 21 Dec 2023 18:01:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181662; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Wx2Xb3yBI5nDc2ovBsIgjH+D56lUacx8ViJl/dOCbdg=; b=l3TJDEPelTAzu/9j4WDDGDr/nXWRTnPaMgjhFfNAm4kxnE4CVHDAYAONkQ8MUzzkw52Eos NqIiFnEQynOW2OwSqpWdhjzYPppFlL4Y3J6N2GAyVSBrMdh1FBBPcaQqItw5c2tFvCgtcW 0/x9hZq09GExUYVrLvjl/WWFA3LW98lXZx8A9PeP5lkCt38oXnSeh2pUpBT7ewyKmyp/Xm 6Z0MG2C9gzwIWVdKpU6dZ/2kUA8HjTpoVVhNcWPWg/9a0DcQhcHvwYZQKOwrv5Xx0WBO9s N0frmnArjneewEm8nm3dwe86xeUX3UOkxPw8Q9YMcBorELXQihCYuLMwUnA0AA== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 08/13] netlink: specs: add ethnl PHY_GET command set Date: Thu, 21 Dec 2023 19:00:41 +0100 Message-ID: <20231221180047.1924733-9-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org The PHY_GET command, supporting both DUMP and GET operations, is used to retrieve the list of PHYs connected to a netdevice, and get topology information to know where exactly it sits on the physical link. Add the netlink specs corresponding to that command. Signed-off-by: Maxime Chevallier --- V5: No changes V4: Remove the ethtool-user generated code V3: New patch Documentation/netlink/specs/ethtool.yaml | 65 ++++++++++++++++++++++++ 1 file changed, 65 insertions(+) diff --git a/Documentation/netlink/specs/ethtool.yaml b/Documentation/netlink/specs/ethtool.yaml index bb6e1dc6d1c5..7f6fb1f61dd4 100644 --- a/Documentation/netlink/specs/ethtool.yaml +++ b/Documentation/netlink/specs/ethtool.yaml @@ -16,6 +16,11 @@ definitions: name: stringset type: enum entries: [] + - + name: phy-upstream-type + enum-name: + type: enum + entries: [ mac, phy ] attribute-sets: - @@ -945,6 +950,45 @@ attribute-sets: - name: burst-tmr type: u32 + - + name: phy-upstream + attributes: + - + name: index + type: u32 + - + name: sfp-name + type: string + - + name: phy + attributes: + - + name: header + type: nest + nested-attributes: header + - + name: index + type: u32 + - + name: drvname + type: string + - + name: name + type: string + - + name: upstream-type + type: u8 + enum: phy-upstream-type + - + name: upstream + type: nest + nested-attributes: phy-upstream + - + name: downstream-sfp-name + type: string + - + name: id + type: u32 operations: enum-model: directional @@ -1696,3 +1740,24 @@ operations: name: mm-ntf doc: Notification for change in MAC Merge configuration. notify: mm-get + - + name: phy-get + doc: Get PHY devices attached to an interface + + attribute-set: phy + + do: &phy-get-op + request: + attributes: + - header + reply: + attributes: + - header + - index + - drvname + - name + - upstream-type + - upstream + - downstream-sfp-name + - id + dump: *phy-get-op From patchwork Thu Dec 21 18:00:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502495 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 373D576DA7; Thu, 21 Dec 2023 18:01:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="BGkMYwDq" Received: by mail.gandi.net (Postfix) with ESMTPSA id 8ECC61C0011; Thu, 21 Dec 2023 18:01:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181663; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mW9L0yXxHluFS6u9qGTLhsIKJ7Hnc+ZoX5GiJeMlEyY=; b=BGkMYwDqNWtAuHi3HCNW0EE5qJOpZj6AptqeXQ3WAwMQIrnxFWZgLKkazuA8A2g5MNFIeD VVZ1h/xkRlNFnq4frEs8Y/qFepRQfYuJfXUFvTtOAxLVtos0x49lqPqeM7j2Ixri2DKi/P +PtuREGj2zuDKOT6DXEe5OBkpS9m4rgnTev0tSFbcCPxkH4Su8GrLVDwkq/4A01ehFEgr8 FQYzPyy01Aj2ALczJXll2Pm1f/8aJptoAIi5k0V9FZOFD1fcsfXXMQOPgVzJ4GMyeWp4/f Nrx4/HCnRe0jj17cQYBEQXHEr9Szov+a6XQ/nNiAlbiWF/EVV0VGcqYRAw03oA== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 09/13] net: ethtool: plca: Target the command to the requested PHY Date: Thu, 21 Dec 2023 19:00:42 +0100 Message-ID: <20231221180047.1924733-10-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org PLCA is a PHY-specific command. Instead of targeting the command towards dev->phydev, use the request to pick the targeted PHY. Signed-off-by: Maxime Chevallier Reviewed-by: Andrew Lunn --- V5: Added Andrew's R-b V4: No changes V3: No changes V2: New patch net/ethtool/plca.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/net/ethtool/plca.c b/net/ethtool/plca.c index b1e2e3b5027f..2b3e419f4dc2 100644 --- a/net/ethtool/plca.c +++ b/net/ethtool/plca.c @@ -61,7 +61,7 @@ static int plca_get_cfg_prepare_data(const struct ethnl_req_info *req_base, int ret; // check that the PHY device is available and connected - if (!dev->phydev) { + if (!req_base->phydev) { ret = -EOPNOTSUPP; goto out; } @@ -80,7 +80,7 @@ static int plca_get_cfg_prepare_data(const struct ethnl_req_info *req_base, memset(&data->plca_cfg, 0xff, sizeof_field(struct plca_reply_data, plca_cfg)); - ret = ops->get_plca_cfg(dev->phydev, &data->plca_cfg); + ret = ops->get_plca_cfg(req_base->phydev, &data->plca_cfg); ethnl_ops_complete(dev); out: @@ -141,7 +141,6 @@ const struct nla_policy ethnl_plca_set_cfg_policy[] = { static int ethnl_set_plca(struct ethnl_req_info *req_info, struct genl_info *info) { - struct net_device *dev = req_info->dev; const struct ethtool_phy_ops *ops; struct nlattr **tb = info->attrs; struct phy_plca_cfg plca_cfg; @@ -149,7 +148,7 @@ ethnl_set_plca(struct ethnl_req_info *req_info, struct genl_info *info) int ret; // check that the PHY device is available and connected - if (!dev->phydev) + if (!req_info->phydev) return -EOPNOTSUPP; ops = ethtool_phy_ops; @@ -168,7 +167,7 @@ ethnl_set_plca(struct ethnl_req_info *req_info, struct genl_info *info) if (!mod) return 0; - ret = ops->set_plca_cfg(dev->phydev, &plca_cfg, info->extack); + ret = ops->set_plca_cfg(req_info->phydev, &plca_cfg, info->extack); return ret < 0 ? ret : 1; } @@ -204,7 +203,7 @@ static int plca_get_status_prepare_data(const struct ethnl_req_info *req_base, int ret; // check that the PHY device is available and connected - if (!dev->phydev) { + if (!req_base->phydev) { ret = -EOPNOTSUPP; goto out; } @@ -223,7 +222,7 @@ static int plca_get_status_prepare_data(const struct ethnl_req_info *req_base, memset(&data->plca_st, 0xff, sizeof_field(struct plca_reply_data, plca_st)); - ret = ops->get_plca_status(dev->phydev, &data->plca_st); + ret = ops->get_plca_status(req_base->phydev, &data->plca_st); ethnl_ops_complete(dev); out: return ret; From patchwork Thu Dec 21 18:00:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502496 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9E92077628; Thu, 21 Dec 2023 18:01:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="he59HTwz" Received: by mail.gandi.net (Postfix) with ESMTPSA id C0F461C0013; Thu, 21 Dec 2023 18:01:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181664; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RkeAnsXmMy6aYQwaTCxZem0lTvH7EaUMRYZjn8TT7Ok=; b=he59HTwzZHxC073jD/+o2VHPxP7KoBUx2QIkTK9+hbAcFdwhtfZLSceVQOP0b4U7UaqBVp 3y3nf/+ZCk/9MNtZo0rkr2h+b+SyuxZAHkmhoagPLDXbb4nbz8YwTEg0aEmWhYymIcfsWY gZ6Bg8nmhB98RSH1nZoQ7swLOsNGRmGpfx3II86qdC/J6uzQsRqGeD31+WHBTjWWwsLpgC 4CJKFAZr42br3YaV/GwJpHcDxC1ujVUxFW9JywavsAWKw3dqTXT00ku3TrtYUn+rrpUCCv 274kBIu2CaMdcc5BhHxKf4pk2cC2khDrC1aZF0XoEIBOBAEYfEYTEKWqSn3jFg== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 10/13] net: ethtool: pse-pd: Target the command to the requested PHY Date: Thu, 21 Dec 2023 19:00:43 +0100 Message-ID: <20231221180047.1924733-11-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org PSE and PD configuration is a PHY-specific command. Instead of targeting the command towards dev->phydev, use the request to pick the targeted PHY device. Signed-off-by: Maxime Chevallier --- V5: Added-back an incorrectly removed check V4: No changes V3: No changes V2: New patch net/ethtool/pse-pd.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/net/ethtool/pse-pd.c b/net/ethtool/pse-pd.c index cc478af77111..4a1c8d37bd3d 100644 --- a/net/ethtool/pse-pd.c +++ b/net/ethtool/pse-pd.c @@ -31,12 +31,10 @@ const struct nla_policy ethnl_pse_get_policy[ETHTOOL_A_PSE_HEADER + 1] = { [ETHTOOL_A_PSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), }; -static int pse_get_pse_attributes(struct net_device *dev, +static int pse_get_pse_attributes(struct phy_device *phydev, struct netlink_ext_ack *extack, struct pse_reply_data *data) { - struct phy_device *phydev = dev->phydev; - if (!phydev) { NL_SET_ERR_MSG(extack, "No PHY is attached"); return -EOPNOTSUPP; @@ -64,7 +62,7 @@ static int pse_prepare_data(const struct ethnl_req_info *req_base, if (ret < 0) return ret; - ret = pse_get_pse_attributes(dev, info->extack, data); + ret = pse_get_pse_attributes(req_base->phydev, info->extack, data); ethnl_ops_complete(dev); @@ -124,7 +122,6 @@ ethnl_set_pse_validate(struct ethnl_req_info *req_info, struct genl_info *info) static int ethnl_set_pse(struct ethnl_req_info *req_info, struct genl_info *info) { - struct net_device *dev = req_info->dev; struct pse_control_config config = {}; struct nlattr **tb = info->attrs; struct phy_device *phydev; @@ -132,7 +129,7 @@ ethnl_set_pse(struct ethnl_req_info *req_info, struct genl_info *info) /* this values are already validated by the ethnl_pse_set_policy */ config.admin_cotrol = nla_get_u32(tb[ETHTOOL_A_PODL_PSE_ADMIN_CONTROL]); - phydev = dev->phydev; + phydev = req_info->phydev; if (!phydev) { NL_SET_ERR_MSG(info->extack, "No PHY is attached"); return -EOPNOTSUPP; From patchwork Thu Dec 21 18:00:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502497 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0951C77B2D; Thu, 21 Dec 2023 18:01:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="VyH2yd6j" Received: by mail.gandi.net (Postfix) with ESMTPSA id 031711C0014; Thu, 21 Dec 2023 18:01:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181666; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=h/OcM575L8jfFrXX7VS5ua1XDSMjSEzffW/tbXnntiI=; b=VyH2yd6jgkQerMi4KTWgfHqLztMfSWsKsUpetFQzgZGycFFvcdutjL/CCXb5HJOv8E3LIk wjZ7aw82tUPnOTtd/d44oloODjD1it13YaHZ/dWfuYYnLAiYZ0xPWu0fpJBEyp8SmAIzd1 3Qo5eD00lmTLuJ7sHY0nI8erKmiSdGhYLd3iny+VD11Vq6+zYSUXOr8/EjRJCBaFkaAIkA jHZBh6bG6cIMm+kytQvI88DU2xR2tSr2xcnbiZomH4DJ9GAgtlGmwkHQ2x+Ct6P6S2HoKL +tIUlvy+JXQW7yUrls9cB7yoUuqPg8in5y6vtdT1VUoxZsMOrtvGy8sAkfipqA== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 11/13] net: ethtool: cable-test: Target the command to the requested PHY Date: Thu, 21 Dec 2023 19:00:44 +0100 Message-ID: <20231221180047.1924733-12-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org Cable testing is a PHY-specific command. Instead of targeting the command towards dev->phydev, use the request to pick the targeted PHY. Signed-off-by: Maxime Chevallier Reviewed-by: Andrew Lunn --- V5: Added Andrew's R-b V4: No changes V3: No changes V2: New patch net/ethtool/cabletest.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/net/ethtool/cabletest.c b/net/ethtool/cabletest.c index 06a151165c31..6b00d0800f23 100644 --- a/net/ethtool/cabletest.c +++ b/net/ethtool/cabletest.c @@ -69,7 +69,7 @@ int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info) return ret; dev = req_info.dev; - if (!dev->phydev) { + if (!req_info.phydev) { ret = -EOPNOTSUPP; goto out_dev_put; } @@ -85,12 +85,12 @@ int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info) if (ret < 0) goto out_rtnl; - ret = ops->start_cable_test(dev->phydev, info->extack); + ret = ops->start_cable_test(req_info.phydev, info->extack); ethnl_ops_complete(dev); if (!ret) - ethnl_cable_test_started(dev->phydev, + ethnl_cable_test_started(req_info.phydev, ETHTOOL_MSG_CABLE_TEST_NTF); out_rtnl: @@ -321,7 +321,7 @@ int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info) return ret; dev = req_info.dev; - if (!dev->phydev) { + if (!req_info.phydev) { ret = -EOPNOTSUPP; goto out_dev_put; } @@ -342,12 +342,12 @@ int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info) if (ret < 0) goto out_rtnl; - ret = ops->start_cable_test_tdr(dev->phydev, info->extack, &cfg); + ret = ops->start_cable_test_tdr(req_info.phydev, info->extack, &cfg); ethnl_ops_complete(dev); if (!ret) - ethnl_cable_test_started(dev->phydev, + ethnl_cable_test_started(req_info.phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF); out_rtnl: From patchwork Thu Dec 21 18:00:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502498 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D213577F15; Thu, 21 Dec 2023 18:01:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="P6xGgCOK" Received: by mail.gandi.net (Postfix) with ESMTPSA id 3E95E1C0016; Thu, 21 Dec 2023 18:01:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181667; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/L19pZWpSlfJz7sFcUtDttLXAqUoAX7c8SoAYBK8OTY=; b=P6xGgCOKorZryCpY6TqXW4ee+fpKUS3ufxMako30VtrgsBSpMao5GVTiipfMuAqcrLOpOp cGnbWs+8Cmv6ED6C+T3amboYSJm+SFOmildQqMEAsEAIeZJB+E8wxKpYDXZCQ8CW4L62dx 03+SDYBURFfmjf3FjQRp0BU8r1/0jD/q6KvcSD+lfFYXEITbMG/6WLQIvtE9EbfzElpohv YHg546L8k9t3ug/sCwP6E743YHUz9DLqag//ifXK8l+bbg0RTpXXLqGoVh11bEL3HK1iY9 DWNlBwZEROul3C7X5IlvPzaTMaGZnvzYgdNh3Mw78Wc00SYBBj/uWSSoS7z5tQ== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 12/13] net: ethtool: strset: Allow querying phy stats by index Date: Thu, 21 Dec 2023 19:00:45 +0100 Message-ID: <20231221180047.1924733-13-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org The ETH_SS_PHY_STATS command gets PHY statistics. Use the phydev pointer from the ethnl request to allow query phy stats from each PHY on the link. Signed-off-by: Maxime Chevallier Reviewed-by: Andrew Lunn --- V5: Added Andrew's R-b V4: No changes V3: No changes V2: New patch net/ethtool/strset.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c index c678b484a079..70c00631c51f 100644 --- a/net/ethtool/strset.c +++ b/net/ethtool/strset.c @@ -233,17 +233,18 @@ static void strset_cleanup_data(struct ethnl_reply_data *reply_base) } static int strset_prepare_set(struct strset_info *info, struct net_device *dev, - unsigned int id, bool counts_only) + struct phy_device *phydev, unsigned int id, + bool counts_only) { const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops; const struct ethtool_ops *ops = dev->ethtool_ops; void *strings; int count, ret; - if (id == ETH_SS_PHY_STATS && dev->phydev && + if (id == ETH_SS_PHY_STATS && phydev && !ops->get_ethtool_phy_stats && phy_ops && phy_ops->get_sset_count) - ret = phy_ops->get_sset_count(dev->phydev); + ret = phy_ops->get_sset_count(phydev); else if (ops->get_sset_count && ops->get_strings) ret = ops->get_sset_count(dev, id); else @@ -258,10 +259,10 @@ static int strset_prepare_set(struct strset_info *info, struct net_device *dev, strings = kcalloc(count, ETH_GSTRING_LEN, GFP_KERNEL); if (!strings) return -ENOMEM; - if (id == ETH_SS_PHY_STATS && dev->phydev && + if (id == ETH_SS_PHY_STATS && phydev && !ops->get_ethtool_phy_stats && phy_ops && phy_ops->get_strings) - phy_ops->get_strings(dev->phydev, strings); + phy_ops->get_strings(phydev, strings); else ops->get_strings(dev, id, strings); info->strings = strings; @@ -305,8 +306,8 @@ static int strset_prepare_data(const struct ethnl_req_info *req_base, !data->sets[i].per_dev) continue; - ret = strset_prepare_set(&data->sets[i], dev, i, - req_info->counts_only); + ret = strset_prepare_set(&data->sets[i], dev, req_base->phydev, + i, req_info->counts_only); if (ret < 0) goto err_ops; } From patchwork Thu Dec 21 18:00:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13502499 X-Patchwork-Delegate: kuba@kernel.org Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 53EEC76DA7; Thu, 21 Dec 2023 18:01:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="IaB5sNvp" Received: by mail.gandi.net (Postfix) with ESMTPSA id 75D121C001A; Thu, 21 Dec 2023 18:01:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1703181668; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=qeMvXt4aojMjFNc/UhiZXP4+CU905smgqiOl3QZSW7E=; b=IaB5sNvpZdpp0DH7lXF6ZpVGyvWyHgc9h1bV9rmrN614LJd6ihtgm97/qV7jWoEuvKrby9 vUMO6fMam/9HUk/tEccvZzB2vTpxkX+VaS1kATuieNhbxhBdiXkVoQHEojZLkJD/djKN6I pH7ln3DtN4WjAPd0GoCU4vQLboD/kIZPzsU2EYmbIfXg6GdCsm1HOrKHYAi98nDliPSq4l GBsDsvpRK89D9wANX8/dHm92hYX6BWjPZlSUY+fpKXt+Zd+gtYGTaWgTDGK2Ket+px7tyj ZqCdvbeOK8Wj9biRETFr5Pz/qht7U7h56b2R2jNrManZVZOqt5g5kf/ZcAZtuQ== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH net-next v5 13/13] Documentation: networking: document phy_link_topology Date: Thu, 21 Dec 2023 19:00:46 +0100 Message-ID: <20231221180047.1924733-14-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> References: <20231221180047.1924733-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: kuba@kernel.org The newly introduced phy_link_topology tracks all ethernet PHYs that are attached to a netdevice. Document the base principle, internal and external APIs. As the phy_link_topology is expected to be extended, this documentation will hold any further improvements and additions made relative to topology handling. Signed-off-by: Maxime Chevallier --- V5: Fixed a lot of typos V4: No changes V3: New patch Documentation/networking/index.rst | 1 + .../networking/phy-link-topology.rst | 121 ++++++++++++++++++ 2 files changed, 122 insertions(+) create mode 100644 Documentation/networking/phy-link-topology.rst diff --git a/Documentation/networking/index.rst b/Documentation/networking/index.rst index 69f3d6dcd9fd..a2c45a75a4a6 100644 --- a/Documentation/networking/index.rst +++ b/Documentation/networking/index.rst @@ -88,6 +88,7 @@ Contents: operstates packet_mmap phonet + phy-link-topology pktgen plip ppp_generic diff --git a/Documentation/networking/phy-link-topology.rst b/Documentation/networking/phy-link-topology.rst new file mode 100644 index 000000000000..1fd8e904ef4b --- /dev/null +++ b/Documentation/networking/phy-link-topology.rst @@ -0,0 +1,121 @@ +.. SPDX-License-Identifier: GPL-2.0 + +================= +PHY link topology +================= + +Overview +======== + +The PHY link topology representation in the networking stack aims at representing +the hardware layout for any given Ethernet link. + +An Ethernet Interface from userspace's point of view is nothing but a +:c:type:`struct net_device `, which exposes configuration options +through the legacy ioctls and the ethool netlink commands. The base assumption +when designing these configuration channels were that the link looked +something like this :: + + +-----------------------+ +----------+ +--------------+ + | Ethernet Controller / | | Ethernet | | Connector / | + | MAC | ------ | PHY | ---- | Port | ---... to LP + +-----------------------+ +----------+ +--------------+ + struct net_device struct phy_device + +Commands that needs to configure the PHY will go through the net_device.phydev +field to reach the PHY and perform the relevant configuration. + +This assumption falls apart in more complex topologies that can arise when, +for example, using SFP transceivers (although that's not the only specific case). + +Here, we have 2 basic scenarios. Either the MAC is able to output a serialized +interface, that can directly be fed to an SFP cage, such as SGMII, 1000BaseX, +10GBaseR, etc. + +The link topology then looks like this (when an SFP module is inserted) :: + + +-----+ SGMII +------------+ + | MAC | ------- | SFP Module | + +-----+ +------------+ + +Knowing that some modules embed a PHY, the actual link is more like :: + + +-----+ SGMII +--------------+ + | MAC | -------- | PHY (on SFP) | + +-----+ +--------------+ + +In this case, the SFP PHY is handled by phylib, and registered by phylink through +its SFP upstream ops. + +Now some Ethernet controllers aren't able to output a serialized interface, so +we can't directly connect them to an SFP cage. However, some PHYs can be used +as media-converters, to translate the non-serialized MAC MII interface to a +serialized MII interface fed to the SFP :: + + +-----+ RGMII +-----------------------+ SGMII +--------------+ + | MAC | ------- | PHY (media converter) | ------- | PHY (on SFP) | + +-----+ +-----------------------+ +--------------+ + +This is where the model of having a single net_device.phydev pointer shows its +limitations, as we now have 2 PHYs on the link. + +The phy_link topology framework aims at providing a way to keep track of every +PHY on the link, for use by both kernel drivers and subsystems, but also to +report the topology to userspace, allowing to target individual PHYs in configuration +commands. + +API +=== + +The :c:type:`struct phy_link_topology ` is a per-netdevice +resource, that gets initialized at netdevice creation. Once it's initialized, +it is then possible to register PHYs to the topology through : + +:c:func:`phy_link_topo_add_phy` + +Besides registering the PHY to the topology, this call will also assign a unique +index to the PHY, which can then be reported to userspace to refer to this PHY +(akin to the ifindex). This index is a u32, ranging from 1 to U32_MAX. The value +0 is reserved to indicate the PHY doesn't belong to any topology yet. + +The PHY can then be removed from the topology through + +:c:func:`phy_link_topo_del_phy` + +These function are already hooked into the phylib subsystem, so all PHYs that +are linked to a net_device through :c:func:`phy_attach_direct` will automatically +join the netdev's topology. + +PHYs that are on a SFP module will also be automatically registered IF the SFP +upstream is phylink (so, no media-converter). + +PHY drivers that can be used as SFP upstream need to call :c:func:`phy_sfp_attach_phy` +and :c:func:`phy_sfp_detach_phy`, which can be used as a +.attach_phy / .detach_phy implementation for the +:c:type:`struct sfp_upstream_ops `. + +UAPI +==== + +There exist a set of netlink commands to query the link topology from userspace, +see ``Documentation/networking/ethtool-netlink.rst``. + +The whole point of having a topology representation is to assign the phyindex +field in :c:type:`struct phy_device `. This index is reported to +userspace using the ``ETHTOOL_MSG_PHY_GET`` ethtnl command. Performing a DUMP operation +will result in all PHYs from all net_device being listed. The DUMP command +accepts either a ``ETHTOOL_A_HEADER_DEV_INDEX`` or ``ETHTOOL_A_HEADER_DEV_NAME`` +to be passed in the request to filter the DUMP to a single net_device. + +The retrieved index can then be passed as a request parameter using the +``ETHTOOL_A_HEADER_PHY_INDEX`` field in the following ethnl commands : + +* ``ETHTOOL_MSG_STRSET_GET`` to get the stats string set from a given PHY +* ``ETHTOOL_MSG_CABLE_TEST_ACT`` and ``ETHTOOL_MSG_CABLE_TEST_ACT``, to perform + cable testing on a given PHY on the link (most likely the outermost PHY) +* ``ETHTOOL_MSG_PSE_SET`` and ``ETHTOOL_MSG_PSE_GET`` for PHY-controlled PoE and PSE settings +* ``ETHTOOL_MSG_PLCA_GET_CFG``, ``ETHTOOL_MSG_PLCA_SET_CFG`` and ``ETHTOOL_MSG_PLCA_GET_STATUS`` + to set the PLCA (Physical Layer Collision Avoidance) parameters + +Note that the PHY index can be passed to other requests, which will silently +ignore it if present and irrelevant.