From: Andrew Lunn <andrew@lunn•ch>
To: Rafa Corvillo <rafael.corvillo@aoifes•com>
Cc: Stephen Hemminger <stephen@networkplumber•org>, netdev@vger•kernel.org
Subject: Re: [ISSUE: sky2 - rx error] Link stops working under heavy traffic load connected to a mv88e6176
Date: Tue, 16 May 2017 14:47:59 +0200 [thread overview]
Message-ID: <20170516124759.GB27959@lunn.ch> (raw)
In-Reply-To: <591AD990.901@aoifes.com>
> Adding 8 bytes (sky2->netdev->mtu + ETH_HLEN + VLAN_HLEN + 8
> (EDSA_HLEN)) does not fix the error, because the interface keep
> having a maximum length of 1518 bytes (sky2->netdev->mtu + ETH_HLEN
> + VLAN_HLEN).
Did you check the value being written to here:
/*
* The receiver hangs if it receives frames larger than the
* packet buffer. As a workaround, truncate oversize frames, but
* the register is limited to 9 bits, so if you do frames > 2052
* you better get the MTU right!
*/
thresh = sky2_get_rx_threshold(sky2);
if (thresh > 0x1ff)
sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_OFF);
else {
sky2_write16(hw, SK_REG(sky2->port, RX_GMF_TR_THR), thresh);
sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_ON);
}
What is thresh?
Andrew
next prev parent reply other threads:[~2017-05-16 12:48 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-21 12:39 [ISSUE: sky2 - rx error] Link stops working under heavy traffic load connected to a mv88e6176 Rafa Corvillo
2017-04-24 6:45 ` Rafa Corvillo
2017-04-25 15:27 ` Stephen Hemminger
2017-04-27 12:05 ` Rafa Corvillo
2017-04-27 13:04 ` Andrew Lunn
2017-04-28 11:54 ` Rafa Corvillo
2017-04-28 12:22 ` Andrew Lunn
2017-05-08 12:03 ` Rafa Corvillo
2017-05-08 12:38 ` Andrew Lunn
2017-05-16 10:50 ` Rafa Corvillo
2017-05-16 12:47 ` Andrew Lunn [this message]
2017-05-16 13:09 ` Rafa Corvillo
2017-05-16 13:21 ` Andrew Lunn
2017-05-16 15:50 ` Rafa Corvillo
2017-05-16 15:58 ` Andrew Lunn
2017-05-16 16:19 ` Rafa Corvillo
2017-05-26 10:13 ` Rafa Corvillo
2017-05-31 19:31 ` Andrew Lunn
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