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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>
This commit is contained in:
Ayaz Abdulla 2008-08-06 12:12:34 -04:00 committed by Jeff Garzik
parent 06941931d8
commit 9a33e88356
1 changed files with 6 additions and 1 deletions
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7
drivers/net/forcedeth.c
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@ -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;