From patchwork Wed Feb 28 11:47:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13575316 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 7F20173508; Wed, 28 Feb 2024 11:47:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.197 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709120864; cv=none; b=FWw2uhZbLKTKAN/lyWEQHvzqV1ahIPjQXxaLcRR76yeBSxfHSEtpRSdizoEAws6Bo6aMA1qi4LVabbsORWr+9PVhLbECGnBJTECD3Snwhs95gx7zjGJOMtCkii+hNHw1mTCuiBfFFjsye1VZCwHWRccp4G9bIcf2k0MkLJRh3LY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709120864; c=relaxed/simple; bh=RcL7d+qGE14AeHb7npqTCaJbK5guFs8G1+0JlO3kDzg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FutONZKguD+L4kxOmAsjdMnlb21gwUH9rGFvOktf/UDOo84BfSPAw0g6y3IZoVie+8XAUas5YICeYqjhl3+Bu7asPX/t83QdVSS01ntwiOYYyVxOixJQYG9EefeLLpzLaOo1juFdzYIxtitUIgqwcI4+JI/+SVpTPQvHr0MoG6Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=GOd44AFz; arc=none smtp.client-ip=217.70.183.197 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="GOd44AFz" Received: by mail.gandi.net (Postfix) with ESMTPSA id BD4F91C0007; Wed, 28 Feb 2024 11:47:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1709120861; 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=tvcBjPLWUmreIyO2riLEwuXmJM0fEvL4w6pwgQM5/V8=; b=GOd44AFzQNQTGaZ2W272g989FRKkoW7l+nsbp+FmeP3nweabW8YGhCNBJl+ejo1/wsZaXi 8qOozfpx8HUNSMT6SBYfD1uwpz+6fU3F6ufFwN4EPdFiLClX1/TT/vQkGMUpjlJp4vvSo7 574g/Vrp33mhb8pvVXGqPhV7wi4BQ0y4Gh4Bvadczhpg4bt3dNVNyiW53UE5TyHnoxOReJ mylMFqWxREknvuE7ElGftKnpsFQJE6yxRj+/w8NEzuqtm93Asd0vhhT3eXMNx4dNQUV6tA u8cY1X1E9jQ3wjL7z3kGPoPjOkgTkrqbm5JlAgNJmpB11bQkUAvoE9/HfRapFQ== 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 , mwojtas@chromium.org Subject: [PATCH net-next v9 05/13] net: ethtool: Allow passing a phy index for some commands Date: Wed, 28 Feb 2024 12:47:19 +0100 Message-ID: <20240228114728.51861-6-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240228114728.51861-1-maxime.chevallier@bootlin.com> References: <20240228114728.51861-1-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 --- V9: - No changes V8: - No changes V7: - No changes V6: - Added dedicated policies when passing a PHY index - Dropped Andrew's R-b as there were changes 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 | 44 +++++++++++++++++++- net/ethtool/netlink.h | 5 +++ 4 files changed, 55 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 bd04f28d5cf4..b8f16398ea9d 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; @@ -30,6 +31,24 @@ const struct nla_policy ethnl_header_policy_stats[] = { ETHTOOL_FLAGS_STATS), }; +const struct nla_policy ethnl_header_policy_phy[] = { + [ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 }, + [ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING, + .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_phy_stats[] = { + [ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 }, + [ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING, + .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) { int ret; @@ -89,8 +108,9 @@ int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info, const struct nlattr *header, struct net *net, struct netlink_ext_ack *extack, bool require_dev) { - struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy)]; + struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy_phy)]; const struct nlattr *devname_attr; + struct phy_device *phydev = NULL; struct net_device *dev = NULL; u32 flags = 0; int ret; @@ -104,7 +124,7 @@ int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info, /* No validation here, command policy should have a nested policy set * for the header, therefore validation should have already been done. */ - ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy) - 1, header, + ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy_phy) - 1, header, NULL, extack); if (ret < 0) return ret; @@ -145,6 +165,26 @@ 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..d57a890b5d9e 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 +397,12 @@ 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_phy[ETHTOOL_A_HEADER_PHY_INDEX + 1]; +extern const struct nla_policy ethnl_header_policy_phy_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];