09fe63205c
- Stateful TCP offload drivers for Terminator 3 and 4 (T3 and T4) ASICs. These are available as t3_tom and t4_tom modules that augment cxgb(4) and cxgbe(4) respectively. The cxgb/cxgbe drivers continue to work as usual with or without these extra features. - iWARP driver for Terminator 3 ASIC (kernel verbs). T4 iWARP in the works and will follow soon. Build-tested with make universe. 30s overview ============ What interfaces support TCP offload? Look for TOE4 and/or TOE6 in the capabilities of an interface: # ifconfig -m | grep TOE Enable/disable TCP offload on an interface (just like any other ifnet capability): # ifconfig cxgbe0 toe # ifconfig cxgbe0 -toe Which connections are offloaded? Look for toe4 and/or toe6 in the output of netstat and sockstat: # netstat -np tcp | grep toe # sockstat -46c | grep toe Reviewed by: bz, gnn Sponsored by: Chelsio communications. MFC after: ~3 months (after 9.1, and after ensuring MFC is feasible)
249 lines
7.4 KiB
C
249 lines
7.4 KiB
C
/*-
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* Copyright (c) 2012 Chelsio Communications, Inc.
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* All rights reserved.
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* Written by: Navdeep Parhar <np@FreeBSD.org>
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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, this list of conditions and the following 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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*/
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#ifndef __T4_TOM_H__
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#define __T4_TOM_H__
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#define KTR_CXGBE KTR_SPARE3
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#define LISTEN_HASH_SIZE 32
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/*
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* Min receive window. We want it to be large enough to accommodate receive
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* coalescing, handle jumbo frames, and not trigger sender SWS avoidance.
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*/
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#define MIN_RCV_WND (24 * 1024U)
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/*
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* Max receive window supported by HW in bytes. Only a small part of it can
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* be set through option0, the rest needs to be set through RX_DATA_ACK.
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*/
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#define MAX_RCV_WND ((1U << 27) - 1)
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/* TOE PCB flags */
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enum {
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TPF_ATTACHED, /* a tcpcb refers to this toepcb */
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TPF_FLOWC_WR_SENT, /* firmware flow context WR sent */
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TPF_TX_DATA_SENT, /* some data sent */
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TPF_TX_SUSPENDED, /* tx suspended for lack of resources */
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TPF_SEND_FIN, /* send FIN after sending all pending data */
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TPF_FIN_SENT, /* FIN has been sent */
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TPF_ABORT_SHUTDOWN, /* connection abort is in progress */
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TPF_CPL_PENDING, /* haven't received the last CPL */
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TPF_SYNQE, /* synq_entry, not really a toepcb */
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TPF_SYNQE_NEEDFREE, /* synq_entry was allocated externally */
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};
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struct ofld_tx_sdesc {
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uint32_t plen; /* payload length */
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uint8_t tx_credits; /* firmware tx credits (unit is 16B) */
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};
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struct toepcb {
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TAILQ_ENTRY(toepcb) link; /* toep_list */
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unsigned int flags; /* miscellaneous flags */
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struct tom_data *td;
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struct inpcb *inp; /* backpointer to host stack's PCB */
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struct port_info *port; /* physical port */
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struct sge_wrq *ofld_txq;
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struct sge_ofld_rxq *ofld_rxq;
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struct sge_wrq *ctrlq;
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struct l2t_entry *l2te; /* L2 table entry used by this connection */
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int tid; /* Connection identifier */
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unsigned int tx_credits;/* tx WR credits (in 16 byte units) remaining */
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unsigned int enqueued; /* # of bytes added to so_rcv (not yet read) */
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int rx_credits; /* rx credits (in bytes) to be returned to hw */
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unsigned int ulp_mode; /* ULP mode */
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/* Tx software descriptor */
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uint8_t txsd_total;
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uint8_t txsd_pidx;
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uint8_t txsd_cidx;
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uint8_t txsd_avail;
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struct ofld_tx_sdesc txsd[];
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};
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struct flowc_tx_params {
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uint32_t snd_nxt;
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uint32_t rcv_nxt;
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unsigned int snd_space;
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unsigned int mss;
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};
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static inline int
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toepcb_flag(struct toepcb *toep, int flag)
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{
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return isset(&toep->flags, flag);
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}
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static inline void
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toepcb_set_flag(struct toepcb *toep, int flag)
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{
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setbit(&toep->flags, flag);
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}
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static inline void
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toepcb_clr_flag(struct toepcb *toep, int flag)
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{
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clrbit(&toep->flags, flag);
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}
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/*
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* Compressed state for embryonic connections for a listener. Barely fits in
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* 64B, try not to grow it further.
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*/
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struct synq_entry {
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TAILQ_ENTRY(synq_entry) link; /* listen_ctx's synq link */
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int flags; /* same as toepcb's tp_flags */
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int tid;
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struct listen_ctx *lctx; /* backpointer to listen ctx */
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struct mbuf *syn;
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uint32_t iss;
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uint32_t ts;
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volatile uintptr_t wr;
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volatile u_int refcnt;
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uint16_t l2e_idx;
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uint16_t rcv_bufsize;
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};
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static inline int
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synqe_flag(struct synq_entry *synqe, int flag)
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{
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return isset(&synqe->flags, flag);
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}
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static inline void
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synqe_set_flag(struct synq_entry *synqe, int flag)
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{
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setbit(&synqe->flags, flag);
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}
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static inline void
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synqe_clr_flag(struct synq_entry *synqe, int flag)
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{
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clrbit(&synqe->flags, flag);
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}
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/* listen_ctx flags */
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#define LCTX_RPL_PENDING 1 /* waiting for a CPL_PASS_OPEN_RPL */
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struct listen_ctx {
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LIST_ENTRY(listen_ctx) link; /* listen hash linkage */
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volatile int refcount;
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int stid;
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int flags;
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struct inpcb *inp; /* listening socket's inp */
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struct sge_wrq *ctrlq;
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struct sge_ofld_rxq *ofld_rxq;
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TAILQ_HEAD(, synq_entry) synq;
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};
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struct tom_data {
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struct toedev tod;
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/* toepcb's associated with this TOE device */
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struct mtx toep_list_lock;
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TAILQ_HEAD(, toepcb) toep_list;
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LIST_HEAD(, listen_ctx) *listen_hash;
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u_long listen_mask;
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int lctx_count; /* # of lctx in the hash table */
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struct mtx lctx_hash_lock;
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};
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static inline struct tom_data *
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tod_td(struct toedev *tod)
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{
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return (member2struct(tom_data, tod, tod));
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}
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static inline struct adapter *
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td_adapter(struct tom_data *td)
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{
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return (td->tod.tod_softc);
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}
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/* t4_tom.c */
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struct toepcb *alloc_toepcb(struct port_info *, int, int, int);
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void free_toepcb(struct toepcb *);
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void offload_socket(struct socket *, struct toepcb *);
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void undo_offload_socket(struct socket *);
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void final_cpl_received(struct toepcb *);
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void insert_tid(struct adapter *, int, void *);
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void *lookup_tid(struct adapter *, int);
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void update_tid(struct adapter *, int, void *);
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void remove_tid(struct adapter *, int);
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void release_tid(struct adapter *, int, struct sge_wrq *);
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int find_best_mtu_idx(struct adapter *, struct in_conninfo *, int);
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u_long select_rcv_wnd(struct socket *);
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int select_rcv_wscale(void);
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uint64_t calc_opt0(struct socket *, struct port_info *, struct l2t_entry *,
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int, int, int, int);
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uint32_t select_ntuple(struct port_info *, struct l2t_entry *, uint32_t);
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/* t4_connect.c */
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void t4_init_connect_cpl_handlers(struct adapter *);
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int t4_connect(struct toedev *, struct socket *, struct rtentry *,
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struct sockaddr *);
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/* t4_listen.c */
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void t4_init_listen_cpl_handlers(struct adapter *);
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int t4_listen_start(struct toedev *, struct tcpcb *);
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int t4_listen_stop(struct toedev *, struct tcpcb *);
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void t4_syncache_added(struct toedev *, void *);
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void t4_syncache_removed(struct toedev *, void *);
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int t4_syncache_respond(struct toedev *, void *, struct mbuf *);
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int do_abort_req_synqe(struct sge_iq *, const struct rss_header *,
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struct mbuf *);
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int do_abort_rpl_synqe(struct sge_iq *, const struct rss_header *,
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struct mbuf *);
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void t4_offload_socket(struct toedev *, void *, struct socket *);
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/* t4_cpl_io.c */
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void t4_init_cpl_io_handlers(struct adapter *);
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void send_abort_rpl(struct adapter *, struct sge_wrq *, int , int);
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void send_flowc_wr(struct toepcb *, struct flowc_tx_params *);
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void send_reset(struct adapter *, struct toepcb *, uint32_t);
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void make_established(struct toepcb *, uint32_t, uint32_t, uint16_t);
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void t4_rcvd(struct toedev *, struct tcpcb *);
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int t4_tod_output(struct toedev *, struct tcpcb *);
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int t4_send_fin(struct toedev *, struct tcpcb *);
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int t4_send_rst(struct toedev *, struct tcpcb *);
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#endif
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