From patchwork Wed Jun 9 18:41:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vladimir Oltean X-Patchwork-Id: 12311063 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B3D8AC48BCD for ; Wed, 9 Jun 2021 18:43:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9D3B4613DF for ; Wed, 9 Jun 2021 18:43:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230040AbhFISp2 (ORCPT ); Wed, 9 Jun 2021 14:45:28 -0400 Received: from mail-ed1-f45.google.com ([209.85.208.45]:37688 "EHLO mail-ed1-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230081AbhFISp0 (ORCPT ); Wed, 9 Jun 2021 14:45:26 -0400 Received: by mail-ed1-f45.google.com with SMTP id b11so29705030edy.4 for ; Wed, 09 Jun 2021 11:43:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Em2Aa6J9F9kVM3gPQWlF7kYj4x4JvyM78lJMl8Zig3o=; b=JoSVQVFTNTAEeYjHGzozM7gQyg24oygZV7KkZt7iI7GlIADiwfPTg6I7QYepOfOQNk aB6Hho0cd+sBAuXZoV2T5XcK9yqrKwUuv3tLSCZ8nt6eZcupa3+DZlck363CM42RiBo8 3vxnIIGXrdiDlgBXb1iuMzvZzdvioDtut273R2+I5oyRxhRQ1ycjUVJHbZfZ2IpdybHy EpkOieHxFz4ByGiRgTtTEmA0LSHf9V6qQoHgWuJ+o/ZUHkh5ntAsrhfkHvIfYPMeigKS idaDECsgD2Fft8wQR1LPA4jHfiUWAhHv+bVmy6HS8LnvN+X4aAOWVVBQYtn0Hj3vjLGW UTPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Em2Aa6J9F9kVM3gPQWlF7kYj4x4JvyM78lJMl8Zig3o=; b=f7dNE6K/wY1WTq1i7BZvHfUcBPV2AvZVDi0BQ9bviaOUqQIA3BXHi2rcBfPOVMY5SX CI9j+bbs9p38WyRoC8ZmwFNblbEdtyMd3U6ke8sQem7eBZiuAEG3R4CeP6n+e4jIDYP0 xbeSzsvlYpKrEL58hsE+vPVcvja26AHccUi9uc1/LaZLlfOl17lupgcxuSQHlYEzs/03 8TKjiG9gslBh6CbRw8TpCmlzEnIihERsaiANdLPRkQEstHvAdUQWC4cldW+Ly9Eej/K5 Ss/lHLIwH9eBk0iLoCU+wG7dn1B/FC11fQ+2/rSlhMNIePVmQ61AlSxz1Y4ZRm0P/upR ki9g== X-Gm-Message-State: AOAM53125ybTlqGnukvqZFsNfXcgsY5J24+pO3apZKvncHAAP7/O+fip kdaU9hTGP7J6n43WyRAVdFc= X-Google-Smtp-Source: ABdhPJw/5MfgzEKbAgmGT6YPTzNE8HTYTLO6hT0SrTjIkVUCJskE9HRcxvqZOxbPYLX/p9++tg5SXQ== X-Received: by 2002:a05:6402:612:: with SMTP id n18mr765642edv.83.1623264143511; Wed, 09 Jun 2021 11:42:23 -0700 (PDT) Received: from localhost.localdomain ([188.26.52.84]) by smtp.gmail.com with ESMTPSA id oz11sm194935ejb.16.2021.06.09.11.42.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Jun 2021 11:42:23 -0700 (PDT) From: Vladimir Oltean To: Jakub Kicinski , "David S. Miller" , netdev@vger.kernel.org Cc: Wong Vee Khee , Ong Boon Leong , Michael Sit Wei Hong , Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , Jose Abreu , Maxime Coquelin , Heiner Kallweit , Russell King - ARM Linux admin , Florian Fainelli , Andrew Lunn , Vivien Didelot , Vladimir Oltean Subject: [PATCH net-next 09/13] net: pcs: xpcs: export xpcs_do_config and xpcs_link_up Date: Wed, 9 Jun 2021 21:41:51 +0300 Message-Id: <20210609184155.921662-10-olteanv@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210609184155.921662-1-olteanv@gmail.com> References: <20210609184155.921662-1-olteanv@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Vladimir Oltean The sja1105 hardware has a quirk in that some changes require a switch reset, which loses all configuration. When the reset is initiated, everything needs to be reprogrammed, including the MACs and the PCS. This is currently done in sja1105_static_config_reload() - we manually call sja1105_adjust_port_config(), sja1105_sgmii_pcs_config() and sja1105_sgmii_pcs_force_speed() which are all internal functions. There is a desire for sja1105 to use the common xpcs driver, and that means that the equivalents of those functions, xpcs_do_config() and xpcs_link_up() respectively, will no longer be local functions. Forcing phylink to retrigger a resolve somehow, say by doing dev_close() followed by dev_open() is not really an option, because the CPU port might have a PCS as well, and there is no net device which we can close and reopen for that. Additionally, the dev_close/dev_open sequence might force a renegotiation of the copper-side link for SGMII ports connected to a PHY, and this is undesirable as well, because the switch reset is much quicker than a PHY autoneg, so we would have a lot more downtime. The only solution I see is for the sja1105 driver to keep doing what it's doing, and that means we need to export the equivalents from xpcs for sja1105_sgmii_pcs_config and sja1105_sgmii_pcs_force_speed, and call them directly in sja1105_static_config_reload(). This will be done during the conversion patch. Signed-off-by: Vladimir Oltean --- drivers/net/pcs/pcs-xpcs.c | 10 ++++++---- include/linux/pcs/pcs-xpcs.h | 4 ++++ 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c index b66e46fc88dc..63fda3fc40aa 100644 --- a/drivers/net/pcs/pcs-xpcs.c +++ b/drivers/net/pcs/pcs-xpcs.c @@ -757,8 +757,8 @@ static int xpcs_config_2500basex(struct dw_xpcs *xpcs) return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL, ret); } -static int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface, - unsigned int mode) +int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface, + unsigned int mode) { const struct xpcs_compat *compat; int ret; @@ -797,6 +797,7 @@ static int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface, return 0; } +EXPORT_SYMBOL_GPL(xpcs_do_config); static int xpcs_config(struct phylink_pcs *pcs, unsigned int mode, phy_interface_t interface, @@ -945,8 +946,8 @@ static void xpcs_link_up_sgmii(struct dw_xpcs *xpcs, unsigned int mode, pr_err("%s: xpcs_write returned %pe\n", __func__, ERR_PTR(ret)); } -static void xpcs_link_up(struct phylink_pcs *pcs, unsigned int mode, - phy_interface_t interface, int speed, int duplex) +void xpcs_link_up(struct phylink_pcs *pcs, unsigned int mode, + phy_interface_t interface, int speed, int duplex) { struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs); @@ -955,6 +956,7 @@ static void xpcs_link_up(struct phylink_pcs *pcs, unsigned int mode, if (interface == PHY_INTERFACE_MODE_SGMII) return xpcs_link_up_sgmii(xpcs, mode, speed, duplex); } +EXPORT_SYMBOL_GPL(xpcs_link_up); static u32 xpcs_get_id(struct dw_xpcs *xpcs) { diff --git a/include/linux/pcs/pcs-xpcs.h b/include/linux/pcs/pcs-xpcs.h index dae7dd8ac683..add077a81b21 100644 --- a/include/linux/pcs/pcs-xpcs.h +++ b/include/linux/pcs/pcs-xpcs.h @@ -27,6 +27,10 @@ struct dw_xpcs { }; int xpcs_get_an_mode(struct dw_xpcs *xpcs, phy_interface_t interface); +void xpcs_link_up(struct phylink_pcs *pcs, unsigned int mode, + phy_interface_t interface, int speed, int duplex); +int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface, + unsigned int mode); void xpcs_validate(struct dw_xpcs *xpcs, unsigned long *supported, struct phylink_link_state *state); int xpcs_config_eee(struct dw_xpcs *xpcs, int mult_fact_100ns,