6b946662d9
The former works better with qualifiers, but also properly type checks the input pointer.
276 lines
8.9 KiB
C
276 lines
8.9 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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#define DDP_RSVD_WIN (16 * 1024U)
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#define SB_DDP_INDICATE SB_IN_TOE /* soreceive must respond to indicate */
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#define M_DDP M_PROTO1
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#define USE_DDP_RX_FLOW_CONTROL
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/* TOE PCB flags */
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enum {
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TPF_ATTACHED = (1 << 0), /* a tcpcb refers to this toepcb */
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TPF_FLOWC_WR_SENT = (1 << 1), /* firmware flow context WR sent */
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TPF_TX_DATA_SENT = (1 << 2), /* some data sent */
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TPF_TX_SUSPENDED = (1 << 3), /* tx suspended for lack of resources */
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TPF_SEND_FIN = (1 << 4), /* send FIN after all pending data */
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TPF_FIN_SENT = (1 << 5), /* FIN has been sent */
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TPF_ABORT_SHUTDOWN = (1 << 6), /* connection abort is in progress */
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TPF_CPL_PENDING = (1 << 7), /* haven't received the last CPL */
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TPF_SYNQE = (1 << 8), /* synq_entry, not really a toepcb */
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TPF_SYNQE_NEEDFREE = (1 << 9), /* synq_entry was malloc'd separately */
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TPF_SYNQE_TCPDDP = (1 << 10), /* ulp_mode TCPDDP in toepcb */
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TPF_SYNQE_EXPANDED = (1 << 11), /* toepcb ready, tid context updated */
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};
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enum {
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DDP_OK = (1 << 0), /* OK to turn on DDP */
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DDP_SC_REQ = (1 << 1), /* state change (on/off) requested */
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DDP_ON = (1 << 2), /* DDP is turned on */
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DDP_BUF0_ACTIVE = (1 << 3), /* buffer 0 in use (not invalidated) */
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DDP_BUF1_ACTIVE = (1 << 4), /* buffer 1 in use (not invalidated) */
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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 ppod_region {
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TAILQ_ENTRY(ppod_region) link;
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int used; /* # of pods used by this region */
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int free; /* # of contiguous pods free right after this region */
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};
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struct ddp_buffer {
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uint32_t tag; /* includes color, page pod addr, and DDP page size */
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int nppods;
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int offset;
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int len;
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struct ppod_region ppod_region;
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int npages;
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vm_page_t *pages;
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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 sb_cc; /* last noted value of so_rcv->sb_cc */
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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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unsigned int ddp_flags;
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struct ddp_buffer *db[2];
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time_t ddp_disabled;
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uint8_t ddp_score;
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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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#define DDP_RETRY_WAIT 5 /* seconds to wait before re-enabling DDP */
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#define DDP_LOW_SCORE 1
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#define DDP_HIGH_SCORE 3
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static inline void
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set_tcpddp_ulp_mode(struct toepcb *toep)
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{
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toep->ulp_mode = ULP_MODE_TCPDDP;
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toep->ddp_flags = DDP_OK;
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toep->ddp_score = DDP_LOW_SCORE;
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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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/* 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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TAILQ_HEAD(ppod_head, ppod_region);
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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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struct mtx lctx_hash_lock;
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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 ppod_lock;
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int nppods;
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int nppods_free; /* # of available ppods */
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int nppods_free_head; /* # of available ppods at the begining */
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struct ppod_head ppods;
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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 (__containerof(tod, struct tom_data, 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 t4_uninit_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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void t4_set_tcb_field(struct adapter *, struct toepcb *, uint16_t, uint64_t,
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uint64_t);
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/* t4_ddp.c */
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void t4_init_ddp(struct adapter *, struct tom_data *);
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void t4_uninit_ddp(struct adapter *, struct tom_data *);
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int t4_soreceive_ddp(struct socket *, struct sockaddr **, struct uio *,
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struct mbuf **, struct mbuf **, int *);
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void enable_ddp(struct adapter *, struct toepcb *toep);
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void release_ddp_resources(struct toepcb *toep);
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#endif
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