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Disable non-ASF packet flushing on Yukon Extreme as vendor's driver

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does. Without this change, Yukon Extreme seems to generate lots of
RX FIFO overruns even though controller has available RX buffers.
These excessive RX FIFO overruns generated lots of pause frames
which in turn killed devices plugged into switch. It seems there is
still occasional RX frame corruption on Yukon Extreme but this
change seems to fix the pause frame storm.

Reported by:	jhb
Tested by:	jhb
MFC after:	5 days
This commit is contained in:
Pyun YongHyeon 2010-04-30 18:04:46 +00:00
parent ad30c76f94
commit 7c8db6fd16
2 changed files with 7 additions and 0 deletions
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5
sys/dev/msk/if_msk.c
View File

@ -3917,6 +3917,11 @@ msk_init_locked(struct msk_if_softc *sc_if)
msk_stop(sc_if);
return;
}
if (sc->msk_hw_id == CHIP_ID_YUKON_EX) {
/* Disable flushing of non-ASF packets. */
CSR_WRITE_4(sc, MR_ADDR(sc_if->msk_port, RX_GMF_CTRL_T),
GMF_RX_MACSEC_FLUSH_OFF);
}
/* Configure interrupt handling. */
if (sc_if->msk_port == MSK_PORT_A) {

2
sys/dev/msk/if_mskreg.h
View File

@ -1941,6 +1941,8 @@
#define RX_TRUNC_OFF BIT_26 /* disable packet truncation */
#define RX_VLAN_STRIP_ON BIT_25 /* enable VLAN stripping */
#define RX_VLAN_STRIP_OFF BIT_24 /* disable VLAN stripping */
#define GMF_RX_MACSEC_FLUSH_ON BIT_23
#define GMF_RX_MACSEC_FLUSH_OFF BIT_22
#define GMF_RX_OVER_ON BIT_19 /* enable flushing on receive overrun */
#define GMF_RX_OVER_OFF BIT_18 /* disable flushing on receive overrun */
#define GMF_ASF_RX_OVER_ON BIT_17 /* enable flushing of ASF when overrun */