From patchwork Thu Oct 7 16:25:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeroen de Borst X-Patchwork-Id: 12542309 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC65BC433FE for ; Thu, 7 Oct 2021 16:25:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B954D61245 for ; Thu, 7 Oct 2021 16:25:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233610AbhJGQ1k (ORCPT ); Thu, 7 Oct 2021 12:27:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55716 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242664AbhJGQ1e (ORCPT ); Thu, 7 Oct 2021 12:27:34 -0400 Received: from mail-pg1-x549.google.com (mail-pg1-x549.google.com [IPv6:2607:f8b0:4864:20::549]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 94F0AC061762 for ; Thu, 7 Oct 2021 09:25:40 -0700 (PDT) Received: by mail-pg1-x549.google.com with SMTP id n22-20020a6563d6000000b0029261ffde9bso121249pgv.22 for ; Thu, 07 Oct 2021 09:25:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:message-id:mime-version:subject:from:to:cc; bh=MLNq0Ecu/DTuLkV9EQCwfPnAyKraiDA8g5gWng3WZe4=; b=LjqHvqT8SH/cHaVN0k7538hp+srgMMgDZqZm6OIzOL0M2hahn+Xbvy3a7Zz/C6Dexi /TH0Jo47yObdm67BPV53GJPBgSerB449VkGnMjGA3A/1nu36moiC8aOoBbpYjSXUp2F3 FcXuK1ROhBgzd03Imsja6F9or23X7VZealSi5TaPRwzR8qrASuubQ+G0N1Esr8GrD0z0 lKkKL8GcJtloZGQL4jWVMJaQa6vbHQs87j5WXdQEVCRtqz30fJPlZ/1hmUgLsPnW4BxC NnoFpGGSdKNeX03eLpJcitFlQbwa8iY6S6SobpmllbBlbU0Usty3pX1ER5c0+03wKvJT /hMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=MLNq0Ecu/DTuLkV9EQCwfPnAyKraiDA8g5gWng3WZe4=; b=eSYLvmkLk7nV5odhWuFpdGYtQ3jvSeXrMyquHedHzXjmmpW+K+0Mfvf6gsqm0dJp/p x/V5NNy206kINeVThY9GgcqZbiyUP8Ob1kCW7FJZEf49/upJMmArYE1LxH8XERqZANmV BlUf81A3hPlMs9JQPaoQ9vnwUBCGRJTfVPL3iXUf1rCbOTcpbrbucT6X2XEeONgb7kTQ zNwLw+z9sp7SBCD0aLsKuKU0/qisa9sXijkGo9EHQnz+9Ov4eK3ZLGTxe8Ip1S9Usdgr GKknBU47K7UvHK/qirXsmqfzdCK4hl0MCFNVYasS7NIwzvmIFJJDGNz7BCV5jniRBzif +xhw== X-Gm-Message-State: AOAM5303gN31YAbXSfFvjHTM847+Jbb32m6B5T9le3FImm+fx3MZyHKF 6B5iphgqo5Ukbwztp07Hw1NuF+jE0sSHHpUP4JleWsU9yqudul+nDVlB0OcDagPdKQ/ULR6AbUl L0cpqT3iTccng77FpjOHA1Cge5T524ZKg9ZcHyA5eHjsDghKwp81RyqFiS1VVd2mXjDQ= X-Google-Smtp-Source: ABdhPJwbXCC+E3iY/Okreuc4VazyysECZJHcFaNP9JMc6HZzxtGTWHPtkcQ4wJIfiDZOMVinUhkawEOq5LPSmg== X-Received: from jeroendb.sea.corp.google.com ([2620:15c:100:202:fe55:7411:11ac:c2a7]) (user=jeroendb job=sendgmr) by 2002:aa7:9203:0:b0:44c:aa4f:5496 with SMTP id 3-20020aa79203000000b0044caa4f5496mr5254454pfo.60.1633623938725; Thu, 07 Oct 2021 09:25:38 -0700 (PDT) Date: Thu, 7 Oct 2021 09:25:28 -0700 Message-Id: <20211007162534.1502578-1-jeroendb@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.33.0.800.g4c38ced690-goog Subject: [PATCH net-next 1/7] gve: Switch to use napi_complete_done From: Jeroen de Borst To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, Yangchun Fu , Catherine Sullivan , David Awogbemila Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Yangchun Fu Use napi_complete_done to allow for the use of gro_flush_timeout. Fixes: f5cedc84a30d2 ("gve: Add transmit and receive support") Signed-off-by: Yangchun Fu Signed-off-by: Catherine Sullivan Signed-off-by: David Awogbemila --- drivers/net/ethernet/google/gve/gve.h | 5 ++- drivers/net/ethernet/google/gve/gve_main.c | 38 +++++++++++++--------- drivers/net/ethernet/google/gve/gve_rx.c | 37 +++++++++++---------- 3 files changed, 43 insertions(+), 37 deletions(-) diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index 85bf825606e8..59c525800e5d 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -825,11 +825,10 @@ __be32 gve_tx_load_event_counter(struct gve_priv *priv, struct gve_tx_ring *tx); /* rx handling */ void gve_rx_write_doorbell(struct gve_priv *priv, struct gve_rx_ring *rx); -bool gve_rx_poll(struct gve_notify_block *block, int budget); +int gve_rx_poll(struct gve_notify_block *block, int budget); +bool gve_rx_work_pending(struct gve_rx_ring *rx); int gve_rx_alloc_rings(struct gve_priv *priv); void gve_rx_free_rings_gqi(struct gve_priv *priv); -bool gve_clean_rx_done(struct gve_rx_ring *rx, int budget, - netdev_features_t feat); /* Reset */ void gve_schedule_reset(struct gve_priv *priv); int gve_reset(struct gve_priv *priv, bool attempt_teardown); diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index cd9df68cc01e..388262c61b8d 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -181,34 +181,40 @@ static int gve_napi_poll(struct napi_struct *napi, int budget) __be32 __iomem *irq_doorbell; bool reschedule = false; struct gve_priv *priv; + int work_done = 0; block = container_of(napi, struct gve_notify_block, napi); priv = block->priv; if (block->tx) reschedule |= gve_tx_poll(block, budget); - if (block->rx) - reschedule |= gve_rx_poll(block, budget); + if (block->rx) { + work_done = gve_rx_poll(block, budget); + reschedule |= work_done == budget; + } if (reschedule) return budget; - napi_complete(napi); - irq_doorbell = gve_irq_doorbell(priv, block); - iowrite32be(GVE_IRQ_ACK | GVE_IRQ_EVENT, irq_doorbell); + /* Complete processing - don't unmask irq if busy polling is enabled */ + if (likely(napi_complete_done(napi, work_done))) { + irq_doorbell = gve_irq_doorbell(priv, block); + iowrite32be(GVE_IRQ_ACK | GVE_IRQ_EVENT, irq_doorbell); - /* Double check we have no extra work. - * Ensure unmask synchronizes with checking for work. - */ - mb(); - if (block->tx) - reschedule |= gve_tx_poll(block, -1); - if (block->rx) - reschedule |= gve_rx_poll(block, -1); - if (reschedule && napi_reschedule(napi)) - iowrite32be(GVE_IRQ_MASK, irq_doorbell); + /* Double check we have no extra work. + * Ensure unmask synchronizes with checking for work. + */ + mb(); - return 0; + if (block->tx) + reschedule |= gve_tx_poll(block, -1); + if (block->rx) + reschedule |= gve_rx_work_pending(block->rx); + + if (reschedule && napi_reschedule(napi)) + iowrite32be(GVE_IRQ_MASK, irq_doorbell); + } + return work_done; } static int gve_napi_poll_dqo(struct napi_struct *napi, int budget) diff --git a/drivers/net/ethernet/google/gve/gve_rx.c b/drivers/net/ethernet/google/gve/gve_rx.c index bb8261368250..bb9fc456416b 100644 --- a/drivers/net/ethernet/google/gve/gve_rx.c +++ b/drivers/net/ethernet/google/gve/gve_rx.c @@ -450,7 +450,7 @@ static bool gve_rx(struct gve_rx_ring *rx, struct gve_rx_desc *rx_desc, return true; } -static bool gve_rx_work_pending(struct gve_rx_ring *rx) +bool gve_rx_work_pending(struct gve_rx_ring *rx) { struct gve_rx_desc *desc; __be16 flags_seq; @@ -518,8 +518,8 @@ static bool gve_rx_refill_buffers(struct gve_priv *priv, struct gve_rx_ring *rx) return true; } -bool gve_clean_rx_done(struct gve_rx_ring *rx, int budget, - netdev_features_t feat) +int gve_clean_rx_done(struct gve_rx_ring *rx, int budget, + netdev_features_t feat) { struct gve_priv *priv = rx->gve; u32 work_done = 0, packets = 0; @@ -553,13 +553,15 @@ bool gve_clean_rx_done(struct gve_rx_ring *rx, int budget, } if (!work_done && rx->fill_cnt - cnt > rx->db_threshold) - return false; + return 0; - u64_stats_update_begin(&rx->statss); - rx->rpackets += packets; - rx->rbytes += bytes; - u64_stats_update_end(&rx->statss); - rx->cnt = cnt; + if (work_done) { + u64_stats_update_begin(&rx->statss); + rx->rpackets += packets; + rx->rbytes += bytes; + u64_stats_update_end(&rx->statss); + rx->cnt = cnt; + } /* restock ring slots */ if (!rx->data.raw_addressing) { @@ -570,26 +572,26 @@ bool gve_clean_rx_done(struct gve_rx_ring *rx, int budget, * falls below a threshold. */ if (!gve_rx_refill_buffers(priv, rx)) - return false; + return 0; /* If we were not able to completely refill buffers, we'll want * to schedule this queue for work again to refill buffers. */ if (rx->fill_cnt - cnt <= rx->db_threshold) { gve_rx_write_doorbell(priv, rx); - return true; + return budget; } } gve_rx_write_doorbell(priv, rx); - return gve_rx_work_pending(rx); + return work_done; } -bool gve_rx_poll(struct gve_notify_block *block, int budget) +int gve_rx_poll(struct gve_notify_block *block, int budget) { struct gve_rx_ring *rx = block->rx; netdev_features_t feat; - bool repoll = false; + int work_done = 0; feat = block->napi.dev->features; @@ -598,8 +600,7 @@ bool gve_rx_poll(struct gve_notify_block *block, int budget) budget = INT_MAX; if (budget > 0) - repoll |= gve_clean_rx_done(rx, budget, feat); - else - repoll |= gve_rx_work_pending(rx); - return repoll; + work_done = gve_clean_rx_done(rx, budget, feat); + + return work_done; }