Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754663Ab1ESAQL (ORCPT ); Wed, 18 May 2011 20:16:11 -0400 Received: from smtp-out.google.com ([74.125.121.67]:40128 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752737Ab1ESAPM (ORCPT ); Wed, 18 May 2011 20:15:12 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to: references:organization; b=trLANmr8VdR/uaOqQYqU9aktKqf+HvXgIV97L0lOcJ5PfkuuZOUOu4IMW7ixM22+C 3VPxDUWkYFdvhB2p/TeZw== From: David Decotigny To: "David S. Miller" , Joe Perches , Szymon Janc , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: kernel-net-upstream@google.com, Sameer Nanda , David Decotigny Subject: [PATCH 3/6] forcedeth: allow to silence tx_timeout debug messages Date: Wed, 18 May 2011 17:14:37 -0700 Message-Id: <1305764080-24853-3-git-send-email-decot@google.com> X-Mailer: git-send-email 1.7.3.1 In-Reply-To: <1305764080-24853-1-git-send-email-decot@google.com> References: <1305764080-24853-1-git-send-email-decot@google.com> Organization: Google, Inc. Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6049 Lines: 150 From: Sameer Nanda This adds a new module parameter "debug_tx_timeout" to silence most debug messages in case of TX timeout. These messages don't provide a signal/noise ratio high enough for production systems and, with ~30kB logged each time, they tend to add to a cascade effect if the system is already under stress (memory pressure, disk, etc.). By default, the parameter is clear, meaning the debug messages are not displayed. Signed-off-by: David Decotigny --- drivers/net/forcedeth.c | 91 ++++++++++++++++++++++++++-------------------- 1 files changed, 51 insertions(+), 40 deletions(-) diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c index 112dc0b..7a6aa08 100644 --- a/drivers/net/forcedeth.c +++ b/drivers/net/forcedeth.c @@ -896,6 +896,11 @@ enum { static int dma_64bit = NV_DMA_64BIT_ENABLED; /* + * Debug output control for tx_timeout + */ +static bool debug_tx_timeout = false; + +/* * Crossover Detection * Realtek 8201 phy + some OEM boards do not work properly. */ @@ -2473,7 +2478,6 @@ static void nv_tx_timeout(struct net_device *dev) u32 status; union ring_type put_tx; int saved_tx_limit; - int i; if (np->msi_flags & NV_MSI_X_ENABLED) status = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQSTAT_MASK; @@ -2482,47 +2486,51 @@ static void nv_tx_timeout(struct net_device *dev) netdev_info(dev, "Got tx_timeout. irq: %08x\n", status); - netdev_info(dev, "Ring at %lx\n", (unsigned long)np->ring_addr); - netdev_info(dev, "Dumping tx registers\n"); - for (i = 0; i <= np->register_size; i += 32) { - netdev_info(dev, - "%3x: %08x %08x %08x %08x %08x %08x %08x %08x\n", - i, - readl(base + i + 0), readl(base + i + 4), - readl(base + i + 8), readl(base + i + 12), - readl(base + i + 16), readl(base + i + 20), - readl(base + i + 24), readl(base + i + 28)); - } - netdev_info(dev, "Dumping tx ring\n"); - for (i = 0; i < np->tx_ring_size; i += 4) { - if (!nv_optimized(np)) { - netdev_info(dev, - "%03x: %08x %08x // %08x %08x // %08x %08x // %08x %08x\n", - i, - le32_to_cpu(np->tx_ring.orig[i].buf), - le32_to_cpu(np->tx_ring.orig[i].flaglen), - le32_to_cpu(np->tx_ring.orig[i+1].buf), - le32_to_cpu(np->tx_ring.orig[i+1].flaglen), - le32_to_cpu(np->tx_ring.orig[i+2].buf), - le32_to_cpu(np->tx_ring.orig[i+2].flaglen), - le32_to_cpu(np->tx_ring.orig[i+3].buf), - le32_to_cpu(np->tx_ring.orig[i+3].flaglen)); - } else { + if (unlikely(debug_tx_timeout)) { + int i; + + netdev_info(dev, "Ring at %lx\n", (unsigned long)np->ring_addr); + netdev_info(dev, "Dumping tx registers\n"); + for (i = 0; i <= np->register_size; i += 32) { netdev_info(dev, - "%03x: %08x %08x %08x // %08x %08x %08x // %08x %08x %08x // %08x %08x %08x\n", + "%3x: %08x %08x %08x %08x %08x %08x %08x %08x\n", i, - le32_to_cpu(np->tx_ring.ex[i].bufhigh), - le32_to_cpu(np->tx_ring.ex[i].buflow), - le32_to_cpu(np->tx_ring.ex[i].flaglen), - le32_to_cpu(np->tx_ring.ex[i+1].bufhigh), - le32_to_cpu(np->tx_ring.ex[i+1].buflow), - le32_to_cpu(np->tx_ring.ex[i+1].flaglen), - le32_to_cpu(np->tx_ring.ex[i+2].bufhigh), - le32_to_cpu(np->tx_ring.ex[i+2].buflow), - le32_to_cpu(np->tx_ring.ex[i+2].flaglen), - le32_to_cpu(np->tx_ring.ex[i+3].bufhigh), - le32_to_cpu(np->tx_ring.ex[i+3].buflow), - le32_to_cpu(np->tx_ring.ex[i+3].flaglen)); + readl(base + i + 0), readl(base + i + 4), + readl(base + i + 8), readl(base + i + 12), + readl(base + i + 16), readl(base + i + 20), + readl(base + i + 24), readl(base + i + 28)); + } + netdev_info(dev, "Dumping tx ring\n"); + for (i = 0; i < np->tx_ring_size; i += 4) { + if (!nv_optimized(np)) { + netdev_info(dev, + "%03x: %08x %08x // %08x %08x // %08x %08x // %08x %08x\n", + i, + le32_to_cpu(np->tx_ring.orig[i].buf), + le32_to_cpu(np->tx_ring.orig[i].flaglen), + le32_to_cpu(np->tx_ring.orig[i+1].buf), + le32_to_cpu(np->tx_ring.orig[i+1].flaglen), + le32_to_cpu(np->tx_ring.orig[i+2].buf), + le32_to_cpu(np->tx_ring.orig[i+2].flaglen), + le32_to_cpu(np->tx_ring.orig[i+3].buf), + le32_to_cpu(np->tx_ring.orig[i+3].flaglen)); + } else { + netdev_info(dev, + "%03x: %08x %08x %08x // %08x %08x %08x // %08x %08x %08x // %08x %08x %08x\n", + i, + le32_to_cpu(np->tx_ring.ex[i].bufhigh), + le32_to_cpu(np->tx_ring.ex[i].buflow), + le32_to_cpu(np->tx_ring.ex[i].flaglen), + le32_to_cpu(np->tx_ring.ex[i+1].bufhigh), + le32_to_cpu(np->tx_ring.ex[i+1].buflow), + le32_to_cpu(np->tx_ring.ex[i+1].flaglen), + le32_to_cpu(np->tx_ring.ex[i+2].bufhigh), + le32_to_cpu(np->tx_ring.ex[i+2].buflow), + le32_to_cpu(np->tx_ring.ex[i+2].flaglen), + le32_to_cpu(np->tx_ring.ex[i+3].bufhigh), + le32_to_cpu(np->tx_ring.ex[i+3].buflow), + le32_to_cpu(np->tx_ring.ex[i+3].flaglen)); + } } } @@ -6006,6 +6014,9 @@ module_param(phy_cross, int, 0); MODULE_PARM_DESC(phy_cross, "Phy crossover detection for Realtek 8201 phy is enabled by setting to 1 and disabled by setting to 0."); module_param(phy_power_down, int, 0); MODULE_PARM_DESC(phy_power_down, "Power down phy and disable link when interface is down (1), or leave phy powered up (0)."); +module_param(debug_tx_timeout, bool, false); +MODULE_PARM_DESC(debug_tx_timeout, + "Dump tx related registers and ring when tx_timeout happens"); MODULE_AUTHOR("Manfred Spraul "); MODULE_DESCRIPTION("Reverse Engineered nForce ethernet driver"); -- 1.7.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/