From nobody Fri Dec 19 20:17:16 2025 Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3B5D624DCE8 for ; Thu, 22 May 2025 23:57:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747958267; cv=none; b=ia++7yoQg+IykQxazIxhGKQ6wSaSoGjDE7tzh4eYTrXqWgdL9oxhEUlT52uuxx3mznNT15R00U7jLyoHM5DYadgNAn9Lu14sHxzvgNBic8j1JhrCEeV/UWzKWyQb8+jTTBuN+JPJPYhWY5MJHIDmvLYs0sfuDkyTXpaI08ue2Nc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747958267; c=relaxed/simple; bh=/d1wmfmY/H2ZGTSo9UGf2XcEy9s/ROiMcqO2TlSq5CQ=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=MNioGI9Jm2332COLaHwmx6XPd0qiv0Kw2je2UV/vTAqR5Pk/GGNR3hsay3XI8kqcJ5rwE6mNugyc48x6o5BfFS/7WiXPtQdOEfZ4yqU6mWG4Z3Lm1QkK0UbkCEprIKw4ki2ecmR/eeSNJXVKt9wTF0VvUMwcKR6evVIJQHARiU4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--hramamurthy.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=ZEWh/Cp7; arc=none smtp.client-ip=209.85.210.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--hramamurthy.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ZEWh/Cp7" Received: by mail-pf1-f201.google.com with SMTP id d2e1a72fcca58-74089884644so7537339b3a.3 for ; Thu, 22 May 2025 16:57:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1747958265; x=1748563065; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=m3lfvrPJ0AXxA1NVOjRkYI+TzJFJEUDkaJgP2lifyhg=; b=ZEWh/Cp7g5EYZQk3C4eFimQxcXu6sT4dn+T+LjTUuENy+qjEo5kJ20XrbGhtM6o74s vJ3m4mr8wQ3mwEiFC8Fha92j+g7F7GUhLLp80lNugKYcxy/1f/up8m4UxGT0JhsPFgRl w+rKsj3UKUeYnSwSVXvr+Zv1lGMMDfVojHK7hMgAuRcVZWKnKFCLlc+PLnIKG4dlaD/m 12GWR+uOUDGzEwY6gT16h/dcIkxFkxS3x+wEpZ87mbwWhlEkF4T7mJOlqwRuAlZ44ugD wP3RC5BZlIoyP1UWFYB893kLiPBXNJTvWCzYm9d2Uhp5rh+Bbvk529Ce4Z+stGSKmAc4 cRPA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747958265; x=1748563065; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=m3lfvrPJ0AXxA1NVOjRkYI+TzJFJEUDkaJgP2lifyhg=; b=WGAygpJgOiYmsk8XlB2Hef9P0maYvzaodJMATZzwYnKCm9zwHyCb/myPDY1ckWNA5p teTZReCSPZAEIKkvj3FOSlo+jPMzm/b+uTjuJxJyVcD3EICKvI2xemymd2VVAAGSyFs6 OQrAhYgLC3w2lG2vq444QO6aC/C3NhdMkPSk21wvhxvdc5ntDIbhjnWpvW9DNV7l5iEx xpP2yy3Jw1uKbgQ/XtB7tnE5DWqdUyaEVPAglFVoBaPHosEtySQuquePfm3B0Al/BkhB 8w2CFyTubUXOENlR1cXey/343mJn7TDv0PC0/tjcTB+ReG8cKVZI4PhuNkHrSYfbg0J1 REHA== X-Forwarded-Encrypted: i=1; AJvYcCX++RNAyCM/jk1WvBvOgSfLOrgeFhf63PArDWo0jeqy6sAvqVFXTlJr59YHLcnNNn+9KDJUnX87gORsZSs=@vger.kernel.org X-Gm-Message-State: AOJu0YzTpsKp11AmITXaMUZ3363L7Ef4hg+kz/ktomxFlwnc/VszL9wn h/ETsZHobZKai51wr/PsPBVHqRCZzFfBw39VbczsHaCF/bKdhFpGKDWF8A0UxOXrOI17Y7MpLcC s6vkiViLsbfHFCqMiK4Q7rZWR3A== X-Google-Smtp-Source: AGHT+IFyQmLu0B+sReid8v2Gzfs5xGL7Y5gVFJhFAppmYxeZxmGUm/kaohdm2+eedhxluTWc+13DhQfworWepJuK/Q== X-Received: from pfus6.prod.google.com ([2002:a05:6a00:8c6:b0:736:a134:94ad]) (user=hramamurthy job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:66d8:b0:740:9d6b:db1a with SMTP id d2e1a72fcca58-742acd507ccmr31565135b3a.15.1747958265417; Thu, 22 May 2025 16:57:45 -0700 (PDT) Date: Thu, 22 May 2025 23:57:32 +0000 In-Reply-To: <20250522235737.1925605-1-hramamurthy@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250522235737.1925605-1-hramamurthy@google.com> X-Mailer: git-send-email 2.49.0.1151.ga128411c76-goog Message-ID: <20250522235737.1925605-4-hramamurthy@google.com> Subject: [PATCH net-next v3 3/8] gve: Add initial PTP device support From: Harshitha Ramamurthy To: netdev@vger.kernel.org Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, jeroendb@google.com, hramamurthy@google.com, andrew+netdev@lunn.ch, willemb@google.com, ziweixiao@google.com, pkaligineedi@google.com, yyd@google.com, joshwash@google.com, shailend@google.com, linux@treblig.org, thostet@google.com, jfraker@google.com, richardcochran@gmail.com, jdamato@fastly.com, vadim.fedorenko@linux.dev, horms@kernel.org, linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" If the device supports reading of the nic clock, add support to initialize and register the PTP clock. Signed-off-by: Ziwei Xiao Reviewed-by: Willem de Bruijn Signed-off-by: Harshitha Ramamurthy --- drivers/net/ethernet/google/Kconfig | 1 + drivers/net/ethernet/google/gve/Makefile | 4 +- drivers/net/ethernet/google/gve/gve.h | 8 +++ drivers/net/ethernet/google/gve/gve_ptp.c | 59 +++++++++++++++++++++++ 4 files changed, 71 insertions(+), 1 deletion(-) create mode 100644 drivers/net/ethernet/google/gve/gve_ptp.c diff --git a/drivers/net/ethernet/google/Kconfig b/drivers/net/ethernet/goo= gle/Kconfig index 564862a57124..14c9431e15e5 100644 --- a/drivers/net/ethernet/google/Kconfig +++ b/drivers/net/ethernet/google/Kconfig @@ -18,6 +18,7 @@ if NET_VENDOR_GOOGLE config GVE tristate "Google Virtual NIC (gVNIC) support" depends on (PCI_MSI && (X86 || CPU_LITTLE_ENDIAN)) + depends on PTP_1588_CLOCK_OPTIONAL select PAGE_POOL help This driver supports Google Virtual NIC (gVNIC)" diff --git a/drivers/net/ethernet/google/gve/Makefile b/drivers/net/etherne= t/google/gve/Makefile index 4520f1c07a63..e0ec227a50f7 100644 --- a/drivers/net/ethernet/google/gve/Makefile +++ b/drivers/net/ethernet/google/gve/Makefile @@ -1,5 +1,7 @@ # Makefile for the Google virtual Ethernet (gve) driver =20 obj-$(CONFIG_GVE) +=3D gve.o -gve-objs :=3D gve_main.o gve_tx.o gve_tx_dqo.o gve_rx.o gve_rx_dqo.o gve_e= thtool.o gve_adminq.o gve_utils.o gve_flow_rule.o \ +gve-y :=3D gve_main.o gve_tx.o gve_tx_dqo.o gve_rx.o gve_rx_dqo.o gve_etht= ool.o gve_adminq.o gve_utils.o gve_flow_rule.o \ gve_buffer_mgmt_dqo.o + +gve-$(CONFIG_PTP_1588_CLOCK) +=3D gve_ptp.o diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/g= oogle/gve/gve.h index cf6947731a9b..8d2aa654fd4c 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -750,6 +751,12 @@ struct gve_rss_config { u32 *hash_lut; }; =20 +struct gve_ptp { + struct ptp_clock_info info; + struct ptp_clock *clock; + struct gve_priv *priv; +}; + struct gve_priv { struct net_device *dev; struct gve_tx_ring *tx; /* array of tx_cfg.num_queues */ @@ -874,6 +881,7 @@ struct gve_priv { =20 /* True if the device supports reading the nic clock */ bool nic_timestamp_supported; + struct gve_ptp *ptp; }; =20 enum gve_service_task_flags_bit { diff --git a/drivers/net/ethernet/google/gve/gve_ptp.c b/drivers/net/ethern= et/google/gve/gve_ptp.c new file mode 100644 index 000000000000..293f8dd49afe --- /dev/null +++ b/drivers/net/ethernet/google/gve/gve_ptp.c @@ -0,0 +1,59 @@ +// SPDX-License-Identifier: (GPL-2.0 OR MIT) +/* Google virtual Ethernet (gve) driver + * + * Copyright (C) 2025 Google LLC + */ + +#include "gve.h" + +static const struct ptp_clock_info gve_ptp_caps =3D { + .owner =3D THIS_MODULE, + .name =3D "gve clock", +}; + +static int __maybe_unused gve_ptp_init(struct gve_priv *priv) +{ + struct gve_ptp *ptp; + int err; + + if (!priv->nic_timestamp_supported) { + dev_dbg(&priv->pdev->dev, "Device does not support PTP\n"); + return -EOPNOTSUPP; + } + + priv->ptp =3D kzalloc(sizeof(*priv->ptp), GFP_KERNEL); + if (!priv->ptp) + return -ENOMEM; + + ptp =3D priv->ptp; + ptp->info =3D gve_ptp_caps; + ptp->clock =3D ptp_clock_register(&ptp->info, &priv->pdev->dev); + + if (IS_ERR(ptp->clock)) { + dev_err(&priv->pdev->dev, "PTP clock registration failed\n"); + err =3D PTR_ERR(ptp->clock); + goto free_ptp; + } + + ptp->priv =3D priv; + return 0; + +free_ptp: + kfree(ptp); + priv->ptp =3D NULL; + return err; +} + +static void __maybe_unused gve_ptp_release(struct gve_priv *priv) +{ + struct gve_ptp *ptp =3D priv->ptp; + + if (!ptp) + return; + + if (ptp->clock) + ptp_clock_unregister(ptp->clock); + + kfree(ptp); + priv->ptp =3D NULL; +} --=20 2.49.0.1143.g0be31eac6b-goog