From: Ayaz Abdulla <aabdulla@nvidia.com>
To: Jeff Garzik <jgarzik@pobox.com>,
Manfred Spraul <manfred@colorfullife.com>,
Andrew Morton <akpm@osdl.org>, nedev <netdev@vger.kernel.org>
Subject: [PATCH 4/4] forcedeth: add tx pause limit
Date: Wed, 06 Aug 2008 12:16:11 -0400 [thread overview]
Message-ID: <4899CE4B.1000606@nvidia.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 211 bytes --]
This patch adds support for limiting the number of tx pause frames to a
default of 8. Previously, hardware would send out continuous stream of
pause frames.
Signed-off-by: Ayaz Abdulla <aabdulla@nvidia.com>
[-- Attachment #2: patch-forcedeth-txpauselimit --]
[-- Type: text/plain, Size: 1180 bytes --]
--- old/drivers/net/forcedeth.c 2008-08-06 12:03:13.000000000 -0400
+++ new/drivers/net/forcedeth.c 2008-08-06 12:05:05.000000000 -0400
@@ -249,6 +249,8 @@
#define NVREG_TX_PAUSEFRAME_ENABLE_V1 0x01800010
#define NVREG_TX_PAUSEFRAME_ENABLE_V2 0x056003f0
#define NVREG_TX_PAUSEFRAME_ENABLE_V3 0x09f00880
+ NvRegTxPauseFrameLimit = 0x174,
+#define NVREG_TX_PAUSEFRAMELIMIT_ENABLE 0x00010000
NvRegMIIStatus = 0x180,
#define NVREG_MIISTAT_ERROR 0x0001
#define NVREG_MIISTAT_LINKCHANGE 0x0008
@@ -3076,8 +3078,11 @@
u32 pause_enable = NVREG_TX_PAUSEFRAME_ENABLE_V1;
if (np->driver_data & DEV_HAS_PAUSEFRAME_TX_V2)
pause_enable = NVREG_TX_PAUSEFRAME_ENABLE_V2;
- if (np->driver_data & DEV_HAS_PAUSEFRAME_TX_V3)
+ if (np->driver_data & DEV_HAS_PAUSEFRAME_TX_V3) {
pause_enable = NVREG_TX_PAUSEFRAME_ENABLE_V3;
+ /* limit the number of tx pause frames to a default of 8 */
+ writel(readl(base + NvRegTxPauseFrameLimit)|NVREG_TX_PAUSEFRAMELIMIT_ENABLE, base + NvRegTxPauseFrameLimit);
+ }
writel(pause_enable, base + NvRegTxPauseFrame);
writel(regmisc|NVREG_MISC1_PAUSE_TX, base + NvRegMisc1);
np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
reply other threads:[~2008-08-06 19:27 UTC|newest]
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