From nobody Mon Dec 15 03:10:20 2025 Received: from out-172.mta0.migadu.com (out-172.mta0.migadu.com [91.218.175.172]) (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 B5E5921ABBD; Fri, 23 May 2025 20:34:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748032493; cv=none; b=tq9VNS3W3K9bgJE8yJ93kyDwqOIvl1tgvH+0OsVMdZ+Ut2o4AqcbI4191L4GhWCdsahhBxelTCw2YjmNI+xmh2sozNNKsBdEvhPeR++qn2T7ba9SG/ziT5i9we4ZTmrHX9sDy4n3i9+t6kJIzh475b0B4Pe9+kG+dCPV/1IGk/0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748032493; c=relaxed/simple; bh=Voeku10SRRpAK3a7wYX3w8F5JvBkAbzS8NwPZ78KNt8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=eHadmRh2lIi9nGvKUwYDg9XGCegHW+wEI2co4jL8bxWSQg6q6rVpCg+EDa+ic12W41RzKzUNrNQzwNyUYbVg5pQLuYkadZG/bufpXqx+RFWME7tZiFWg1Rg7I3qvedC581XzPfF4GGq8gcMi1q6/3xt0EfCSAVrWbVIJZPgnQLs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=oMAp3hCp; arc=none smtp.client-ip=91.218.175.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="oMAp3hCp" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1748032489; 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=r1XKemuy6/UrY+NE8ZaaQVwiJse3Wts0PodHIHVO3tk=; b=oMAp3hCpm8XS2Ki0ylJ942GaAlNc56AiVC1ylzCJco5vl+Y1emLMc5Ll5CCOQq2aW3CtWs iBQoG/7DJGfvfRrq+XeoblRf7Y1hZBWb66br1sunsbGGxPnjw3NOqIjG80kWNSpsIQW5cQ RtB0ubOi/u+5JJe2R5lD/1W7m1Ez/HA= From: Sean Anderson To: netdev@vger.kernel.org, Andrew Lunn , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Russell King Cc: Lei Wei , Heiner Kallweit , Christian Marangi , Kory Maincent , Simon Horman , Daniel Golle , Vineeth Karumanchi , linux-kernel@vger.kernel.org, Sean Anderson , Claudiu Beznea , Nicolas Ferre Subject: [net-next PATCH v5 09/10] net: macb: Support external PCSs Date: Fri, 23 May 2025 16:33:38 -0400 Message-Id: <20250523203339.1993685-10-sean.anderson@linux.dev> In-Reply-To: <20250523203339.1993685-1-sean.anderson@linux.dev> References: <20250523203339.1993685-1-sean.anderson@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" This adds support for external PCSs. For example, the Xilinx UltraScale+ processor exposes its GMII interface to the FPGA fabric. This fabric may implement PCS to convert GMII to a serial interface such as SGMII or 1000BASE-X. When present, the external PCS takes precedence over the internal PCSs. Signed-off-by: Sean Anderson --- (no changes since v4) Changes in v4: - Convert to dev-less pcs_put Changes in v2: - Move update to macb_pcs_get_state to previous patch drivers/net/ethernet/cadence/macb.h | 1 + drivers/net/ethernet/cadence/macb_main.c | 26 ++++++++++++++++++++++-- 2 files changed, 25 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cad= ence/macb.h index c9a5c8beb2fa..9d310814f052 100644 --- a/drivers/net/ethernet/cadence/macb.h +++ b/drivers/net/ethernet/cadence/macb.h @@ -1291,6 +1291,7 @@ struct macb { struct phylink_config phylink_config; struct phylink_pcs phylink_usx_pcs; struct phylink_pcs phylink_sgmii_pcs; + struct phylink_pcs *phylink_ext_pcs; =20 u32 caps; unsigned int dma_burst_length; diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/etherne= t/cadence/macb_main.c index 30591ce8be88..a35f2a3b9fc9 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include #include @@ -707,7 +708,10 @@ static struct phylink_pcs *macb_mac_select_pcs(struct = phylink_config *config, struct net_device *ndev =3D to_net_dev(config->dev); struct macb *bp =3D netdev_priv(ndev); =20 - if (interface =3D=3D PHY_INTERFACE_MODE_10GBASER) + if (bp->phylink_ext_pcs && + test_bit(interface, bp->phylink_ext_pcs->supported_interfaces)) + return bp->phylink_ext_pcs; + else if (interface =3D=3D PHY_INTERFACE_MODE_10GBASER) return &bp->phylink_usx_pcs; else if (interface =3D=3D PHY_INTERFACE_MODE_SGMII) return &bp->phylink_sgmii_pcs; @@ -733,7 +737,10 @@ static void macb_mac_config(struct phylink_config *con= fig, unsigned int mode, if (state->interface =3D=3D PHY_INTERFACE_MODE_RMII) ctrl |=3D MACB_BIT(RM9200_RMII); } else if (macb_is_gem(bp)) { - if (macb_mac_select_pcs(config, state->interface)) + struct phylink_pcs *pcs =3D macb_mac_select_pcs(config, + state->interface); + + if (pcs && pcs !=3D bp->phylink_ext_pcs) ctrl |=3D GEM_BIT(PCSSEL); else ctrl &=3D ~GEM_BIT(PCSSEL); @@ -907,6 +914,14 @@ static int macb_mii_probe(struct net_device *dev) bp->phylink_sgmii_pcs.ops =3D &macb_phylink_pcs_ops; bp->phylink_usx_pcs.ops =3D &macb_phylink_usx_pcs_ops; =20 + bp->phylink_ext_pcs =3D pcs_get_by_fwnode_optional(&bp->pdev->dev, + bp->pdev->dev.fwnode, + NULL); + if (IS_ERR(bp->phylink_ext_pcs)) + return dev_err_probe(&bp->pdev->dev, + PTR_ERR(bp->phylink_ext_pcs), + "Could not get external PCS\n"); + bp->phylink_config.dev =3D &dev->dev; bp->phylink_config.type =3D PHYLINK_NETDEV; bp->phylink_config.mac_managed_pm =3D true; @@ -924,6 +939,11 @@ static int macb_mii_probe(struct net_device *dev) __set_bit(PHY_INTERFACE_MODE_RMII, bp->phylink_config.supported_interfaces); =20 + if (bp->phylink_ext_pcs) + phy_interface_or(bp->phylink_config.supported_interfaces, + bp->phylink_config.supported_interfaces, + bp->phylink_ext_pcs->supported_interfaces); + /* Determine what modes are supported */ if (macb_is_gem(bp) && (bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE)) { bp->phylink_config.mac_capabilities |=3D MAC_1000FD; @@ -950,6 +970,7 @@ static int macb_mii_probe(struct net_device *dev) if (IS_ERR(bp->phylink)) { netdev_err(dev, "Could not create a phylink instance (%ld)\n", PTR_ERR(bp->phylink)); + pcs_put(bp->phylink_ext_pcs); return PTR_ERR(bp->phylink); } =20 @@ -5455,6 +5476,7 @@ static void macb_remove(struct platform_device *pdev) bp->rx_clk, bp->tsu_clk); pm_runtime_set_suspended(&pdev->dev); } + pcs_put(bp->phylink_ext_pcs); phylink_destroy(bp->phylink); free_netdev(dev); } --=20 2.35.1.1320.gc452695387.dirty