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authorAyaz Abdulla <aabdulla@nvidia.com>2008-08-06 12:12:34 -0400
committerJeff Garzik <jgarzik@redhat.com>2008-08-07 02:11:01 -0400
commit9a33e883564c2db8e1b3b645de4579a98ac084d2 (patch)
tree32b786f7e8b52a9ff81cc2d876daa0d9b11a6e76 /drivers/net/forcedeth.c
parent06941931d8697dd939d7cac379565b1b2de1415f (diff)
forcedeth: add tx pause limit
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> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/net/forcedeth.c')
-rw-r--r--drivers/net/forcedeth.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index d9495d2fd80..053971e5fc9 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -249,6 +249,8 @@ enum {
#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 @@ static void nv_update_pause(struct net_device *dev, u32 pause_flags)
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;