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Message-Id: <47650719c85908eb4dff05f5d243cc0e9e181748.1321384662.git.david.decotigny@google.com>
Date: Tue, 15 Nov 2011 11:25:36 -0800
From: David Decotigny <david.decotigny@...gle.com>
To: netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
Ian Campbell <ian.campbell@...rix.com>,
Eric Dumazet <eric.dumazet@...il.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
Ben Hutchings <bhutchings@...arflare.com>,
Jiri Pirko <jpirko@...hat.com>, Joe Perches <joe@...ches.com>,
Szymon Janc <szymon@...c.net.pl>,
Richard Jones <rick.jones2@...com>,
Ayaz Abdulla <AAbdulla@...dia.com>,
Sameer Nanda <snanda@...gle.com>,
David Decotigny <david.decotigny@...gle.com>
Subject: [PATCH net-next v4 3/8] forcedeth: allow to silence "TX timeout" debug messages
From: Sameer Nanda <snanda@...gle.com>
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 that only a single warning
will be reported.
Signed-off-by: David Decotigny <david.decotigny@...gle.com>
---
drivers/net/ethernet/nvidia/forcedeth.c | 98 ++++++++++++++++++-------------
1 files changed, 57 insertions(+), 41 deletions(-)
diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
index fe17e42..9b917ff 100644
--- a/drivers/net/ethernet/nvidia/forcedeth.c
+++ b/drivers/net/ethernet/nvidia/forcedeth.c
@@ -892,6 +892,11 @@ 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.
*/
@@ -2477,56 +2482,64 @@ 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;
else
status = readl(base + NvRegIrqStatus) & NVREG_IRQSTAT_MASK;
- netdev_info(dev, "Got tx_timeout. irq: %08x\n", status);
+ netdev_warn(dev, "Got tx_timeout. irq status: %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));
+ }
}
}
@@ -6156,6 +6169,9 @@ 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, 0);
+MODULE_PARM_DESC(debug_tx_timeout,
+ "Dump tx related registers and ring when tx_timeout happens");
MODULE_AUTHOR("Manfred Spraul <manfred@...orfullife.com>");
MODULE_DESCRIPTION("Reverse Engineered nForce ethernet driver");
--
1.7.3.1
--
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