From 76802851b6e1b78b614ba611d6b5d27a83f60ded Mon Sep 17 00:00:00 2001 From: Andreas Mohr Date: Sun, 31 Jan 2010 02:58:19 +0000 Subject: [PATCH] MCS7830 USB-Ether: add Rx error support ChangeLog: - evaluate Rx error statistics from trailing Rx status byte - add driver TODO list - add myself to authors Quilt series run-tested, based on 2.6.33-rc4 (net-2.6.git mcs7830 has idle history, should be good to go). Signed-off-by: Andreas Mohr Signed-off-by: David S. Miller --- drivers/net/usb/mcs7830.c | 43 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 42 insertions(+), 1 deletion(-) diff --git a/drivers/net/usb/mcs7830.c b/drivers/net/usb/mcs7830.c index 87374317f480..22cccda33366 100644 --- a/drivers/net/usb/mcs7830.c +++ b/drivers/net/usb/mcs7830.c @@ -3,11 +3,27 @@ * * based on usbnet.c, asix.c and the vendor provided mcs7830 driver * + * Copyright (C) 2010 Andreas Mohr * Copyright (C) 2006 Arnd Bergmann * Copyright (C) 2003-2005 David Hollis * Copyright (C) 2005 Phil Chang * Copyright (c) 2002-2003 TiVo Inc. * + * Definitions gathered from MOSCHIP, Data Sheet_7830DA.pdf (thanks!). + * + * TODO: + * - add .reset_resume support (iface is _gone_ after resume w/ power loss) + * - verify that mcs7830_get_regs() does have same output pre-/post-suspend + * - support HIF_REG_CONFIG_SLEEPMODE/HIF_REG_CONFIG_TXENABLE (via autopm?) + * - implement ethtool_ops get_pauseparam/set_pauseparam + * via HIF_REG_PAUSE_THRESHOLD (>= revision C only!) + * - implement get_eeprom/[set_eeprom] + * - switch PHY on/off on ifup/ifdown (perhaps in usbnet.c, via MII) + * - mcs7830_get_regs() handling is weird: for rev 2 we return 32 regs, + * can access only ~ 24, remaining user buffer is uninitialized garbage + * - anything else? + * + * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or @@ -83,6 +99,17 @@ enum { HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0, }; +/* Trailing status byte in Ethernet Rx frame */ +enum { + MCS7830_RX_SHORT_FRAME = 0x01, /* < 64 bytes */ + MCS7830_RX_LENGTH_ERROR = 0x02, /* framelen != Ethernet length field */ + MCS7830_RX_ALIGNMENT_ERROR = 0x04, /* non-even number of nibbles */ + MCS7830_RX_CRC_ERROR = 0x08, + MCS7830_RX_LARGE_FRAME = 0x10, /* > 1518 bytes */ + MCS7830_RX_FRAME_CORRECT = 0x20, /* frame is correct */ + /* [7:6] reserved */ +}; + struct mcs7830_data { u8 multi_filter[8]; u8 config; @@ -539,9 +566,23 @@ static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb) skb_trim(skb, skb->len - 1); status = skb->data[skb->len]; - if (status != 0x20) + if (status != MCS7830_RX_FRAME_CORRECT) { dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status); + /* hmm, perhaps usbnet.c already sees a globally visible + frame error and increments rx_errors on its own already? */ + dev->net->stats.rx_errors++; + + if (status & (MCS7830_RX_SHORT_FRAME + |MCS7830_RX_LENGTH_ERROR + |MCS7830_RX_LARGE_FRAME)) + dev->net->stats.rx_length_errors++; + if (status & MCS7830_RX_ALIGNMENT_ERROR) + dev->net->stats.rx_frame_errors++; + if (status & MCS7830_RX_CRC_ERROR) + dev->net->stats.rx_crc_errors++; + } + return skb->len > 0; }