From patchwork Fri Jul 29 15:33:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 12932548 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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81CC9C00144 for ; Fri, 29 Jul 2022 15:34:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237642AbiG2PeJ (ORCPT ); Fri, 29 Jul 2022 11:34:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237613AbiG2PeI (ORCPT ); Fri, 29 Jul 2022 11:34:08 -0400 Received: from relay10.mail.gandi.net (relay10.mail.gandi.net [IPv6:2001:4b98:dc4:8::230]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B031482FA0; Fri, 29 Jul 2022 08:34:06 -0700 (PDT) Received: (Authenticated sender: maxime.chevallier@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 69E97240004; Fri, 29 Jul 2022 15:34:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1659108844; 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=MehLvgxuZZq6sTGGrO5ryf5fGr3lhjU5FMYHDu+xdfM=; b=EpmDu6mPepAiyzlZJahu/e/4irqhHhVdJfYBnphfKMSTPi5noNUX7sAALG233o0dhX3wGl OXcVryYRFNyV998VAqpuMJuQh1ujmV4NM5jUoZNb9iU3XQiaU1gOaPLAOyJKI2rxeUBvIR d23kpg2waovFjlaQCaX0AAs8tOYUveTjbSxAZ/AGIMvU0VwuZbvi/0y+tbg9yMA9Sy2mDI F01R65C2DFomnN8iMpRalTA3E9mSMIU0LA6et276QvN/vklLYQieW3WsGs/6ZzWmc8raXx BbFLC2SM/c4k4PAsBMZGBU2UTUQbqZd9bKvJZgKUHc3W1UlnD0LQ/GELEiC3bg== From: Maxime Chevallier To: davem@davemloft.net, Rob Herring Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Florian Fainelli , Heiner Kallweit , Russell King , linux-arm-kernel@lists.infradead.org, Richard Cochran , Horatiu.Vultur@microchip.com, Allan.Nielsen@microchip.com, UNGLinuxDriver@microchip.com Subject: [PATCH net-next v3 1/4] net: phy: Introduce QUSGMII PHY mode Date: Fri, 29 Jul 2022 17:33:53 +0200 Message-Id: <20220729153356.581444-2-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220729153356.581444-1-maxime.chevallier@bootlin.com> References: <20220729153356.581444-1-maxime.chevallier@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org The QUSGMII mode is a derivative of Cisco's USXGMII standard. This standard is pretty similar to SGMII, but allows for faster speeds, and has the build-in bits for Quad and Octa variants (like QSGMII). The main difference with SGMII/QSGMII is that USXGMII/QUSGMII re-uses the preamble to carry various information, named 'Extensions'. As of today, the USXGMII standard only mentions the "PCH" extension, which is used to convey timestamps, allowing in-band signaling of PTP timestamps without having to modify the frame itself. This commit adds support for that mode. When no extension is in use, it behaves exactly like QSGMII, although it's not compatible with QSGMII. Signed-off-by: Maxime Chevallier Reviewed-by: Andrew Lunn --- V1->V2 : No changes V2->v3 : Added missing documentation on the new enum value Documentation/networking/phy.rst | 9 +++++++++ drivers/net/phy/phylink.c | 3 +++ include/linux/phy.h | 4 ++++ 3 files changed, 16 insertions(+) diff --git a/Documentation/networking/phy.rst b/Documentation/networking/phy.rst index 704f31da5167..712e44caebd0 100644 --- a/Documentation/networking/phy.rst +++ b/Documentation/networking/phy.rst @@ -308,6 +308,15 @@ Some of the interface modes are described below: rate of 125Mpbs using a 4B/5B encoding scheme, resulting in an underlying data rate of 100Mpbs. +``PHY_INTERFACE_MODE_QUSGMII`` + This defines the Cisco the Quad USGMII mode, which is the Quad variant of + the USGMII (Universal SGMII) link. It's very similar to QSGMII, but uses + a Packet Control Header (PCH) instead of the 7 bytes preamble to carry not + only the port id, but also so-called "extensions". The only documented + extension so-far in the specification is the inclusion of timestamps, for + PTP-enabled PHYs. This mode isn't compatible with QSGMII, but offers the + same capabilities in terms of link speed and negociation. + Pause frames / flow control =========================== diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 9bd69328dc4d..d2455df1d8d2 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -321,6 +321,7 @@ void phylink_get_linkmodes(unsigned long *linkmodes, phy_interface_t interface, case PHY_INTERFACE_MODE_RGMII_ID: case PHY_INTERFACE_MODE_RGMII: case PHY_INTERFACE_MODE_QSGMII: + case PHY_INTERFACE_MODE_QUSGMII: case PHY_INTERFACE_MODE_SGMII: case PHY_INTERFACE_MODE_GMII: caps |= MAC_1000HD | MAC_1000FD; @@ -632,6 +633,7 @@ static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode) switch (pl->link_config.interface) { case PHY_INTERFACE_MODE_SGMII: case PHY_INTERFACE_MODE_QSGMII: + case PHY_INTERFACE_MODE_QUSGMII: phylink_set(pl->supported, 10baseT_Half); phylink_set(pl->supported, 10baseT_Full); phylink_set(pl->supported, 100baseT_Half); @@ -2929,6 +2931,7 @@ void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, case PHY_INTERFACE_MODE_SGMII: case PHY_INTERFACE_MODE_QSGMII: + case PHY_INTERFACE_MODE_QUSGMII: phylink_decode_sgmii_word(state, lpa); break; diff --git a/include/linux/phy.h b/include/linux/phy.h index 87638c55d844..9eeab9b9a74c 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -115,6 +115,7 @@ extern const int phy_10gbit_features_array[1]; * @PHY_INTERFACE_MODE_25GBASER: 25G BaseR * @PHY_INTERFACE_MODE_USXGMII: Universal Serial 10GE MII * @PHY_INTERFACE_MODE_10GKR: 10GBASE-KR - with Clause 73 AN + * @PHY_INTERFACE_MODE_QUSGMII: Quad Universal SGMII * @PHY_INTERFACE_MODE_MAX: Book keeping * * Describes the interface between the MAC and PHY. @@ -152,6 +153,7 @@ typedef enum { PHY_INTERFACE_MODE_USXGMII, /* 10GBASE-KR - with Clause 73 AN */ PHY_INTERFACE_MODE_10GKR, + PHY_INTERFACE_MODE_QUSGMII, PHY_INTERFACE_MODE_MAX, } phy_interface_t; @@ -267,6 +269,8 @@ static inline const char *phy_modes(phy_interface_t interface) return "10gbase-kr"; case PHY_INTERFACE_MODE_100BASEX: return "100base-x"; + case PHY_INTERFACE_MODE_QUSGMII: + return "qusgmii"; default: return "unknown"; }