From nobody Mon Feb 9 06:00:01 2026 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (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 7048334AB1D for ; Fri, 14 Nov 2025 21:12:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763154750; cv=none; b=UDXpM6j/FnKkHJElk4O9WkmmzewpBGT/aME6kp46T2KfaM7x9N2nyLcM5nhv541tHtIWwBhcMA4Enrg8isMZNV361lFsDYGo+PFkEPD5LjAvIknB9tefqf0QvJjB34RxDRa+5aGvFtxE5WF+6cwWTDr0c9d6/5RlwjVp7keJqII= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763154750; c=relaxed/simple; bh=zVyF4eCmetz8qkPkTMcTx44ahznevhy/p0XTEImdKRw=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=K+NDhAyQQdyEn0UPkqg/M0kUyVdHwVoLzJK2hkfIBXeYhVRW2ncZVgiotNPwmQlEgVwkElFkVO8DgVHIKy3Jd62xsWKXe2ekf1amEk7tR8+/Sr97wUa2LfNO1XwPgN3FdY820AFZJhFVVC3QbcDJ4aNZTwXKZoeALfnVKA2xDso= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--joshwash.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=nn8j/TDv; arc=none smtp.client-ip=209.85.216.74 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--joshwash.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="nn8j/TDv" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-340c261fb38so4898159a91.0 for ; Fri, 14 Nov 2025 13:12:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1763154747; x=1763759547; 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=7Y/piwZstoQ4BnBjUX1Vciq6F5LLISS027ouNsEaB94=; b=nn8j/TDvGb/931H6AnnnuA/eLPLzpytrDyBKJuQH1sUT48X5oXeQHLqS9lb1TRh7N3 Aw5KplDLpTtBxy3sFGymgxgniuJ5tHILA5XuZEvoMG9i8x+XG9a6gCfbrJinBt87wE89 d2rmFDlMIg5t9nmAqF+LY+CdOUSZhSsblt+sqon9GMnKK/NCal1HAAuQdingMFBP5uFm PK67i+QreuP1kU671zugAX3LeqVuIeVPueXh7qCWy7JuhdS6xyytoGYO3YceMCFHWRoi X5gcVhMbCd4rMUviKen+mRkUjrdk0NSGHBFYSiwUKkWVR0UPdwCgBukLc3mdxPMpl33E Yv0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763154747; x=1763759547; 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=7Y/piwZstoQ4BnBjUX1Vciq6F5LLISS027ouNsEaB94=; b=Q3M1DvC/QxrmwciySM8iYUxzLgC69At7TQ2g+M089lI0K8oqjGrecfg+EKobvK5jB0 Ny4cMdlCoIANWPxyxGlYSeb0M2W0JdIePK4heBM+JnnxgAQuvbW6rXdU5OC/BADz0aLi 8x7gs1pCpxFggU3Sq/ZuUNcEpgclyeyMnKZZwcJmjJkNxWHavlNuF0xTPPzrL3FyXUX+ lfDIjvrLmGByoMTySmgczuoMz3lEpyKQGEv4YiOsv1Nvldg2nhH7cSCz3uNRE1aJM97Q zyu8yq1QxekzeKMvV8UyTqCf+q+5SbljfoH1Fu/NK/c+vKK0xbckFbaUes/lOokxeF2G chyQ== X-Forwarded-Encrypted: i=1; AJvYcCUujrWzcKHVqEuIi4HmqjN2RMlCfh9ISXWNbYW+B4uxqFty/+LA9IEVv+yE5+wopg182fWyXGIONnwZYeY=@vger.kernel.org X-Gm-Message-State: AOJu0YwlB0rzuVb1LgnFLMt9Uym8ryF4uAP6VptTUCdi7l9hteXY2Kk8 g7GkObpJ262WvzwRmH+8dK26h8tNyS0M/q9bU39aBhq4ujjqwOY9msBv0zfx10TFXKzaD0Sxor0 UDQOJUHUpJtMXZw== X-Google-Smtp-Source: AGHT+IGZU0N5DqgSQDGu2t1JpZWqiC9MfzdAhqENlzoLqYOPfSiO6nWEDpRKF/5fje3psrOGSncU1GiPoXN8ag== X-Received: from pjblp4.prod.google.com ([2002:a17:90b:4a84:b0:340:bb32:f5cf]) (user=joshwash job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:17cc:b0:340:cb39:74cd with SMTP id 98e67ed59e1d1-343fa74d17amr4615610a91.32.1763154746769; Fri, 14 Nov 2025 13:12:26 -0800 (PST) Date: Fri, 14 Nov 2025 13:11:45 -0800 In-Reply-To: <20251114211146.292068-1-joshwash@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251114211146.292068-1-joshwash@google.com> X-Mailer: git-send-email 2.52.0.rc1.455.g30608eb744-goog Message-ID: <20251114211146.292068-4-joshwash@google.com> Subject: [PATCH net-next 3/4] gve: Prepare bpf_xdp_metadata_rx_timestamp support From: joshwash@google.com To: netdev@vger.kernel.org Cc: Joshua Washington , Harshitha Ramamurthy , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Richard Cochran , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Willem de Bruijn , Praveen Kaligineedi , Tim Hostetler , Kevin Yang , linux-kernel@vger.kernel.org, bpf@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Tim Hostetler Support populating XDP RX metadata with hardware RX timestamps. This patch utilizes the same underlying logic to calculate hardware timestamps as the regular RX path. xdp_metadata_ops is registered with the net_device in a future patch. gve_rx_calculate_hwtstamp was pulled out so as to not duplicate logic between gve_xdp_rx_timestamp and gve_rx_hwtstamp. Signed-off-by: Tim Hostetler Reviewed-by: Willem de Bruijn Reviewed-by: Harshitha Ramamurthy Signed-off-by: Joshua Washington --- drivers/net/ethernet/google/gve/gve.h | 2 + drivers/net/ethernet/google/gve/gve_dqo.h | 1 + drivers/net/ethernet/google/gve/gve_rx_dqo.c | 41 +++++++++++++++----- 3 files changed, 34 insertions(+), 10 deletions(-) diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/g= oogle/gve/gve.h index a21e599cf710..970d5ca8cdde 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -208,6 +208,8 @@ struct gve_rx_buf_state_dqo { /* Wrapper for XDP Rx metadata */ struct gve_xdp_buff { struct xdp_buff xdp; + struct gve_priv *gve; + const struct gve_rx_compl_desc_dqo *compl_desc; }; =20 /* `head` and `tail` are indices into an array, or -1 if empty. */ diff --git a/drivers/net/ethernet/google/gve/gve_dqo.h b/drivers/net/ethern= et/google/gve/gve_dqo.h index 6eb442096e02..5871f773f0c7 100644 --- a/drivers/net/ethernet/google/gve/gve_dqo.h +++ b/drivers/net/ethernet/google/gve/gve_dqo.h @@ -36,6 +36,7 @@ netdev_tx_t gve_tx_dqo(struct sk_buff *skb, struct net_de= vice *dev); netdev_features_t gve_features_check_dqo(struct sk_buff *skb, struct net_device *dev, netdev_features_t features); +int gve_xdp_rx_timestamp(const struct xdp_md *_ctx, u64 *timestamp); bool gve_tx_poll_dqo(struct gve_notify_block *block, bool do_clean); bool gve_xdp_poll_dqo(struct gve_notify_block *block); bool gve_xsk_tx_poll_dqo(struct gve_notify_block *block, int budget); diff --git a/drivers/net/ethernet/google/gve/gve_rx_dqo.c b/drivers/net/eth= ernet/google/gve/gve_rx_dqo.c index 76b26896f572..f20d1b1d06e6 100644 --- a/drivers/net/ethernet/google/gve/gve_rx_dqo.c +++ b/drivers/net/ethernet/google/gve/gve_rx_dqo.c @@ -456,20 +456,38 @@ static void gve_rx_skb_hash(struct sk_buff *skb, * Note that this means if the time delta between packet reception and the= last * clock read is greater than ~2 seconds, this will provide invalid result= s. */ +static ktime_t gve_rx_get_hwtstamp(struct gve_priv *gve, u32 hwts) +{ + u64 last_read =3D READ_ONCE(gve->last_sync_nic_counter); + u32 low =3D (u32)last_read; + s32 diff =3D hwts - low; + + return ns_to_ktime(last_read + diff); +} + static void gve_rx_skb_hwtstamp(struct gve_rx_ring *rx, const struct gve_rx_compl_desc_dqo *desc) { - u64 last_read =3D READ_ONCE(rx->gve->last_sync_nic_counter); struct sk_buff *skb =3D rx->ctx.skb_head; - u32 ts, low; - s32 diff; - - if (desc->ts_sub_nsecs_low & GVE_DQO_RX_HWTSTAMP_VALID) { - ts =3D le32_to_cpu(desc->ts); - low =3D (u32)last_read; - diff =3D ts - low; - skb_hwtstamps(skb)->hwtstamp =3D ns_to_ktime(last_read + diff); - } + + if (desc->ts_sub_nsecs_low & GVE_DQO_RX_HWTSTAMP_VALID) + skb_hwtstamps(skb)->hwtstamp =3D + gve_rx_get_hwtstamp(rx->gve, le32_to_cpu(desc->ts)); +} + +int gve_xdp_rx_timestamp(const struct xdp_md *_ctx, u64 *timestamp) +{ + const struct gve_xdp_buff *ctx =3D (void *)_ctx; + + if (!ctx->gve->nic_ts_report) + return -ENODATA; + + if (!(ctx->compl_desc->ts_sub_nsecs_low & GVE_DQO_RX_HWTSTAMP_VALID)) + return -ENODATA; + + *timestamp =3D gve_rx_get_hwtstamp(ctx->gve, + le32_to_cpu(ctx->compl_desc->ts)); + return 0; } =20 static void gve_rx_free_skb(struct napi_struct *napi, struct gve_rx_ring *= rx) @@ -851,6 +869,9 @@ static int gve_rx_dqo(struct napi_struct *napi, struct = gve_rx_ring *rx, buf_state->page_info.page_offset, buf_state->page_info.pad, buf_len, false); + gve_xdp.gve =3D priv; + gve_xdp.compl_desc =3D compl_desc; + old_data =3D gve_xdp.xdp.data; xdp_act =3D bpf_prog_run_xdp(xprog, &gve_xdp.xdp); buf_state->page_info.pad +=3D gve_xdp.xdp.data - old_data; --=20 2.51.2.1041.gc1ab5b90ca-goog