d68875eb7e
controller. These controllers are also known as L1C(AR8131) and L2C(AR8132) respectively. These controllers resembles the first generation controller L1 but usage of different descriptor format and new register mappings over L1 register space requires a new driver. There are a couple of registers I still don't understand but the driver seems to have no critical issues for performance and stability. Currently alc(4) supports the following hardware features. o MSI o TCP Segmentation offload o Hardware VLAN tag insertion/stripping o Tx/Rx interrupt moderation o Hardware statistics counters(dev.alc.%d.stats) o Jumbo frame o WOL AR8131/AR8132 also supports Tx checksum offloading but I disabled it due to stability issues. I'm not sure this comes from broken sample boards or hardware bugs. If you know your controller works without problems you can still enable it. The controller has a silicon bug for Rx checksum offloading, so the feature was not implemented. I'd like to say big thanks to Atheros. Atheros kindly sent sample boards to me and answered several questions I had. HW donated by: Atheros Communications, Inc.
275 lines
7.9 KiB
C
275 lines
7.9 KiB
C
/*-
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* Copyright (c) 2009, Pyun YongHyeon <yongari@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _IF_ALCVAR_H
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#define _IF_ALCVAR_H
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#define ALC_TX_RING_CNT 256
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#define ALC_TX_RING_ALIGN sizeof(struct tx_desc)
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#define ALC_RX_RING_CNT 256
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#define ALC_RX_RING_ALIGN sizeof(struct rx_desc)
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#define ALC_RX_BUF_ALIGN 4
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#define ALC_RR_RING_CNT ALC_RX_RING_CNT
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#define ALC_RR_RING_ALIGN sizeof(struct rx_rdesc)
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#define ALC_CMB_ALIGN 8
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#define ALC_SMB_ALIGN 8
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#define ALC_TSO_MAXSEGSIZE 4096
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#define ALC_TSO_MAXSIZE (65535 + sizeof(struct ether_vlan_header))
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#define ALC_MAXTXSEGS 32
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#define ALC_ADDR_LO(x) ((uint64_t) (x) & 0xFFFFFFFF)
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#define ALC_ADDR_HI(x) ((uint64_t) (x) >> 32)
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#define ALC_DESC_INC(x, y) ((x) = ((x) + 1) % (y))
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/* Water mark to kick reclaiming Tx buffers. */
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#define ALC_TX_DESC_HIWAT ((ALC_TX_RING_CNT * 6) / 10)
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#define ALC_MSI_MESSAGES 1
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#define ALC_MSIX_MESSAGES 1
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#define ALC_TX_RING_SZ \
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(sizeof(struct tx_desc) * ALC_TX_RING_CNT)
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#define ALC_RX_RING_SZ \
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(sizeof(struct rx_desc) * ALC_RX_RING_CNT)
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#define ALC_RR_RING_SZ \
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(sizeof(struct rx_rdesc) * ALC_RR_RING_CNT)
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#define ALC_CMB_SZ (sizeof(struct cmb))
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#define ALC_SMB_SZ (sizeof(struct smb))
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#define ALC_PROC_MIN 16
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#define ALC_PROC_MAX (ALC_RX_RING_CNT - 1)
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#define ALC_PROC_DEFAULT (ALC_RX_RING_CNT / 4)
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#define ALC_JUMBO_FRAMELEN (9 * 1024)
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#define ALC_JUMBO_MTU \
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(ALC_JUMBO_FRAMELEN - sizeof(struct ether_vlan_header) - ETHER_CRC_LEN)
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#define ALC_MAX_FRAMELEN (ETHER_MAX_LEN + ETHER_VLAN_ENCAP_LEN)
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/*
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* The number of bits reserved for MSS in AR8121/AR8132 controllers
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* are 13 bits. This limits the maximum interface MTU size in TSO
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* case(8191 + sizeof(struct ip) + sizeof(struct tcphdr)) as upper
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* stack should not generate TCP segments with MSS greater than the
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* limit. Also Atheros says that maximum MTU for TSO is 6KB.
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*/
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#define ALC_TSO_MTU (6 * 1024)
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struct alc_rxdesc {
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struct mbuf *rx_m;
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bus_dmamap_t rx_dmamap;
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struct rx_desc *rx_desc;
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};
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struct alc_txdesc {
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struct mbuf *tx_m;
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bus_dmamap_t tx_dmamap;
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};
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struct alc_ring_data {
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struct tx_desc *alc_tx_ring;
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bus_addr_t alc_tx_ring_paddr;
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struct rx_desc *alc_rx_ring;
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bus_addr_t alc_rx_ring_paddr;
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struct rx_rdesc *alc_rr_ring;
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bus_addr_t alc_rr_ring_paddr;
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struct cmb *alc_cmb;
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bus_addr_t alc_cmb_paddr;
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struct smb *alc_smb;
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bus_addr_t alc_smb_paddr;
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};
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struct alc_chain_data {
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bus_dma_tag_t alc_parent_tag;
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bus_dma_tag_t alc_buffer_tag;
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bus_dma_tag_t alc_tx_tag;
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struct alc_txdesc alc_txdesc[ALC_TX_RING_CNT];
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bus_dma_tag_t alc_rx_tag;
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struct alc_rxdesc alc_rxdesc[ALC_RX_RING_CNT];
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bus_dma_tag_t alc_tx_ring_tag;
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bus_dmamap_t alc_tx_ring_map;
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bus_dma_tag_t alc_rx_ring_tag;
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bus_dmamap_t alc_rx_ring_map;
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bus_dma_tag_t alc_rr_ring_tag;
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bus_dmamap_t alc_rr_ring_map;
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bus_dmamap_t alc_rx_sparemap;
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bus_dma_tag_t alc_cmb_tag;
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bus_dmamap_t alc_cmb_map;
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bus_dma_tag_t alc_smb_tag;
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bus_dmamap_t alc_smb_map;
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int alc_tx_prod;
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int alc_tx_cons;
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int alc_tx_cnt;
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int alc_rx_cons;
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int alc_rr_cons;
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int alc_rxlen;
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struct mbuf *alc_rxhead;
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struct mbuf *alc_rxtail;
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struct mbuf *alc_rxprev_tail;
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};
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struct alc_hw_stats {
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/* Rx stats. */
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uint32_t rx_frames;
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uint32_t rx_bcast_frames;
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uint32_t rx_mcast_frames;
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uint32_t rx_pause_frames;
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uint32_t rx_control_frames;
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uint32_t rx_crcerrs;
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uint32_t rx_lenerrs;
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uint64_t rx_bytes;
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uint32_t rx_runts;
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uint32_t rx_fragments;
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uint32_t rx_pkts_64;
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uint32_t rx_pkts_65_127;
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uint32_t rx_pkts_128_255;
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uint32_t rx_pkts_256_511;
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uint32_t rx_pkts_512_1023;
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uint32_t rx_pkts_1024_1518;
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uint32_t rx_pkts_1519_max;
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uint32_t rx_pkts_truncated;
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uint32_t rx_fifo_oflows;
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uint32_t rx_rrs_errs;
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uint32_t rx_alignerrs;
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uint64_t rx_bcast_bytes;
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uint64_t rx_mcast_bytes;
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uint32_t rx_pkts_filtered;
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/* Tx stats. */
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uint32_t tx_frames;
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uint32_t tx_bcast_frames;
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uint32_t tx_mcast_frames;
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uint32_t tx_pause_frames;
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uint32_t tx_excess_defer;
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uint32_t tx_control_frames;
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uint32_t tx_deferred;
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uint64_t tx_bytes;
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uint32_t tx_pkts_64;
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uint32_t tx_pkts_65_127;
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uint32_t tx_pkts_128_255;
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uint32_t tx_pkts_256_511;
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uint32_t tx_pkts_512_1023;
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uint32_t tx_pkts_1024_1518;
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uint32_t tx_pkts_1519_max;
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uint32_t tx_single_colls;
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uint32_t tx_multi_colls;
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uint32_t tx_late_colls;
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uint32_t tx_excess_colls;
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uint32_t tx_abort;
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uint32_t tx_underrun;
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uint32_t tx_desc_underrun;
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uint32_t tx_lenerrs;
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uint32_t tx_pkts_truncated;
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uint64_t tx_bcast_bytes;
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uint64_t tx_mcast_bytes;
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};
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/*
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* Software state per device.
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*/
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struct alc_softc {
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struct ifnet *alc_ifp;
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device_t alc_dev;
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device_t alc_miibus;
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struct resource *alc_res[1];
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struct resource_spec *alc_res_spec;
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struct resource *alc_irq[ALC_MSI_MESSAGES];
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struct resource_spec *alc_irq_spec;
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void *alc_intrhand[ALC_MSI_MESSAGES];
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int alc_rev;
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int alc_chip_rev;
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int alc_phyaddr;
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uint8_t alc_eaddr[ETHER_ADDR_LEN];
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uint32_t alc_dma_rd_burst;
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uint32_t alc_dma_wr_burst;
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uint32_t alc_rcb;
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int alc_flags;
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#define ALC_FLAG_PCIE 0x0001
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#define ALC_FLAG_PCIX 0x0002
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#define ALC_FLAG_MSI 0x0004
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#define ALC_FLAG_MSIX 0x0008
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#define ALC_FLAG_FASTETHER 0x0020
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#define ALC_FLAG_JUMBO 0x0040
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#define ALC_FLAG_ASPM_MON 0x0080
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#define ALC_FLAG_CMB_BUG 0x0100
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#define ALC_FLAG_SMB_BUG 0x0200
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#define ALC_FLAG_DETACH 0x4000
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#define ALC_FLAG_LINK 0x8000
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struct callout alc_tick_ch;
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struct alc_hw_stats alc_stats;
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struct alc_chain_data alc_cdata;
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struct alc_ring_data alc_rdata;
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int alc_if_flags;
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int alc_watchdog_timer;
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int alc_process_limit;
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volatile int alc_morework;
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int alc_int_rx_mod;
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int alc_int_tx_mod;
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int alc_buf_size;
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struct task alc_int_task;
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struct task alc_tx_task;
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struct taskqueue *alc_tq;
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struct mtx alc_mtx;
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};
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/* Register access macros. */
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#define CSR_WRITE_4(_sc, reg, val) \
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bus_write_4((_sc)->alc_res[0], (reg), (val))
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#define CSR_WRITE_2(_sc, reg, val) \
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bus_write_2((_sc)->alc_res[0], (reg), (val))
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#define CSR_WRITE_1(_sc, reg, val) \
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bus_write_1((_sc)->alc_res[0], (reg), (val))
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#define CSR_READ_2(_sc, reg) \
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bus_read_2((_sc)->alc_res[0], (reg))
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#define CSR_READ_4(_sc, reg) \
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bus_read_4((_sc)->alc_res[0], (reg))
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#define ALC_RXCHAIN_RESET(_sc) \
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do { \
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(_sc)->alc_cdata.alc_rxhead = NULL; \
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(_sc)->alc_cdata.alc_rxtail = NULL; \
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(_sc)->alc_cdata.alc_rxprev_tail = NULL; \
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(_sc)->alc_cdata.alc_rxlen = 0; \
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} while (0)
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#define ALC_LOCK(_sc) mtx_lock(&(_sc)->alc_mtx)
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#define ALC_UNLOCK(_sc) mtx_unlock(&(_sc)->alc_mtx)
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#define ALC_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->alc_mtx, MA_OWNED)
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#define ALC_TX_TIMEOUT 5
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#define ALC_RESET_TIMEOUT 100
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#define ALC_TIMEOUT 1000
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#define ALC_PHY_TIMEOUT 1000
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#endif /* _IF_ALCVAR_H */
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