ixgbe: fix several counter register errata
Several counters behave differently on 82598 causing them to display incorrect values. Adjust the accounting so the reported numbers make sense and do not double count or represent the wrong item. Signed-off-by: Ayyappan Veeraiyan <ayyappan.veeraiyan@intel.com> Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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@ -2026,22 +2026,26 @@ static int ixgbe_close(struct net_device *netdev)
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void ixgbe_update_stats(struct ixgbe_adapter *adapter)
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{
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struct ixgbe_hw *hw = &adapter->hw;
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u64 good_rx, missed_rx, bprc;
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u64 total_mpc = 0;
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u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
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adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
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good_rx = IXGBE_READ_REG(hw, IXGBE_GPRC);
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missed_rx = IXGBE_READ_REG(hw, IXGBE_MPC(0));
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missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(1));
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missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(2));
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missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(3));
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missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(4));
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missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(5));
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missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(6));
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missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(7));
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adapter->stats.gprc += (good_rx - missed_rx);
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for (i = 0; i < 8; i++) {
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/* for packet buffers not used, the register should read 0 */
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mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
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missed_rx += mpc;
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adapter->stats.mpc[i] += mpc;
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total_mpc += adapter->stats.mpc[i];
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adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
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}
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adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
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/* work around hardware counting issue */
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adapter->stats.gprc -= missed_rx;
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adapter->stats.mpc[0] += missed_rx;
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/* 82598 hardware only has a 32 bit counter in the high register */
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adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
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adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
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adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
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bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
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adapter->stats.bprc += bprc;
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adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
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@ -2053,28 +2057,34 @@ void ixgbe_update_stats(struct ixgbe_adapter *adapter)
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adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
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adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
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adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
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adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
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adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
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adapter->stats.lxontxc += IXGBE_READ_REG(hw, IXGBE_LXONTXC);
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adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
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adapter->stats.lxofftxc += IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
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lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
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adapter->stats.lxontxc += lxon;
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lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
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adapter->stats.lxofftxc += lxoff;
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adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
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adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
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adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
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adapter->stats.rnbc[0] += IXGBE_READ_REG(hw, IXGBE_RNBC(0));
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adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
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/*
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* 82598 errata - tx of flow control packets is included in tx counters
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*/
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xon_off_tot = lxon + lxoff;
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adapter->stats.gptc -= xon_off_tot;
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adapter->stats.mptc -= xon_off_tot;
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adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
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adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
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adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
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adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
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adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
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adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
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adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
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adapter->stats.ptc64 -= xon_off_tot;
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adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
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adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
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adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
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adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
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adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
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adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
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adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
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/* Fill out the OS statistics structure */
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@ -2090,8 +2100,7 @@ void ixgbe_update_stats(struct ixgbe_adapter *adapter)
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adapter->net_stats.rx_dropped = 0;
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adapter->net_stats.rx_length_errors = adapter->stats.rlec;
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adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
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adapter->net_stats.rx_missed_errors = adapter->stats.mpc[0];
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adapter->net_stats.rx_missed_errors = total_mpc;
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}
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/**
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