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>
diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index d9495d2..053971e 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -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;