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/*-
* Copyright (c) 2012 Chelsio Communications, Inc.
* All rights reserved.
* Written by: Navdeep Parhar <np@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: release/9.1.0/sys/dev/cxgbe/tom/t4_tom.h 237263 2012-06-19 07:34:13Z np $
*
*/
#ifndef __T4_TOM_H__
#define __T4_TOM_H__
#define KTR_CXGBE KTR_SPARE3
#define LISTEN_HASH_SIZE 32
/*
* Min receive window. We want it to be large enough to accommodate receive
* coalescing, handle jumbo frames, and not trigger sender SWS avoidance.
*/
#define MIN_RCV_WND (24 * 1024U)
/*
* Max receive window supported by HW in bytes. Only a small part of it can
* be set through option0, the rest needs to be set through RX_DATA_ACK.
*/
#define MAX_RCV_WND ((1U << 27) - 1)
/* TOE PCB flags */
enum {
TPF_ATTACHED, /* a tcpcb refers to this toepcb */
TPF_FLOWC_WR_SENT, /* firmware flow context WR sent */
TPF_TX_DATA_SENT, /* some data sent */
TPF_TX_SUSPENDED, /* tx suspended for lack of resources */
TPF_SEND_FIN, /* send FIN after sending all pending data */
TPF_FIN_SENT, /* FIN has been sent */
TPF_ABORT_SHUTDOWN, /* connection abort is in progress */
TPF_CPL_PENDING, /* haven't received the last CPL */
TPF_SYNQE, /* synq_entry, not really a toepcb */
TPF_SYNQE_NEEDFREE, /* synq_entry was allocated externally */
};
struct ofld_tx_sdesc {
uint32_t plen; /* payload length */
uint8_t tx_credits; /* firmware tx credits (unit is 16B) */
};
struct toepcb {
TAILQ_ENTRY(toepcb) link; /* toep_list */
unsigned int flags; /* miscellaneous flags */
struct tom_data *td;
struct inpcb *inp; /* backpointer to host stack's PCB */
struct port_info *port; /* physical port */
struct sge_wrq *ofld_txq;
struct sge_ofld_rxq *ofld_rxq;
struct sge_wrq *ctrlq;
struct l2t_entry *l2te; /* L2 table entry used by this connection */
int tid; /* Connection identifier */
unsigned int tx_credits;/* tx WR credits (in 16 byte units) remaining */
unsigned int enqueued; /* # of bytes added to so_rcv (not yet read) */
int rx_credits; /* rx credits (in bytes) to be returned to hw */
unsigned int ulp_mode; /* ULP mode */
/* Tx software descriptor */
uint8_t txsd_total;
uint8_t txsd_pidx;
uint8_t txsd_cidx;
uint8_t txsd_avail;
struct ofld_tx_sdesc txsd[];
};
struct flowc_tx_params {
uint32_t snd_nxt;
uint32_t rcv_nxt;
unsigned int snd_space;
unsigned int mss;
};
static inline int
toepcb_flag(struct toepcb *toep, int flag)
{
return isset(&toep->flags, flag);
}
static inline void
toepcb_set_flag(struct toepcb *toep, int flag)
{
setbit(&toep->flags, flag);
}
static inline void
toepcb_clr_flag(struct toepcb *toep, int flag)
{
clrbit(&toep->flags, flag);
}
/*
* Compressed state for embryonic connections for a listener. Barely fits in
* 64B, try not to grow it further.
*/
struct synq_entry {
TAILQ_ENTRY(synq_entry) link; /* listen_ctx's synq link */
int flags; /* same as toepcb's tp_flags */
int tid;
struct listen_ctx *lctx; /* backpointer to listen ctx */
struct mbuf *syn;
uint32_t iss;
uint32_t ts;
volatile uintptr_t wr;
volatile u_int refcnt;
uint16_t l2e_idx;
uint16_t rcv_bufsize;
};
static inline int
synqe_flag(struct synq_entry *synqe, int flag)
{
return isset(&synqe->flags, flag);
}
static inline void
synqe_set_flag(struct synq_entry *synqe, int flag)
{
setbit(&synqe->flags, flag);
}
static inline void
synqe_clr_flag(struct synq_entry *synqe, int flag)
{
clrbit(&synqe->flags, flag);
}
/* listen_ctx flags */
#define LCTX_RPL_PENDING 1 /* waiting for a CPL_PASS_OPEN_RPL */
struct listen_ctx {
LIST_ENTRY(listen_ctx) link; /* listen hash linkage */
volatile int refcount;
int stid;
int flags;
struct inpcb *inp; /* listening socket's inp */
struct sge_wrq *ctrlq;
struct sge_ofld_rxq *ofld_rxq;
TAILQ_HEAD(, synq_entry) synq;
};
struct tom_data {
struct toedev tod;
/* toepcb's associated with this TOE device */
struct mtx toep_list_lock;
TAILQ_HEAD(, toepcb) toep_list;
LIST_HEAD(, listen_ctx) *listen_hash;
u_long listen_mask;
int lctx_count; /* # of lctx in the hash table */
struct mtx lctx_hash_lock;
};
static inline struct tom_data *
tod_td(struct toedev *tod)
{
return (member2struct(tom_data, tod, tod));
}
static inline struct adapter *
td_adapter(struct tom_data *td)
{
return (td->tod.tod_softc);
}
/* t4_tom.c */
struct toepcb *alloc_toepcb(struct port_info *, int, int, int);
void free_toepcb(struct toepcb *);
void offload_socket(struct socket *, struct toepcb *);
void undo_offload_socket(struct socket *);
void final_cpl_received(struct toepcb *);
void insert_tid(struct adapter *, int, void *);
void *lookup_tid(struct adapter *, int);
void update_tid(struct adapter *, int, void *);
void remove_tid(struct adapter *, int);
void release_tid(struct adapter *, int, struct sge_wrq *);
int find_best_mtu_idx(struct adapter *, struct in_conninfo *, int);
u_long select_rcv_wnd(struct socket *);
int select_rcv_wscale(void);
uint64_t calc_opt0(struct socket *, struct port_info *, struct l2t_entry *,
int, int, int, int);
uint32_t select_ntuple(struct port_info *, struct l2t_entry *, uint32_t);
/* t4_connect.c */
void t4_init_connect_cpl_handlers(struct adapter *);
int t4_connect(struct toedev *, struct socket *, struct rtentry *,
struct sockaddr *);
/* t4_listen.c */
void t4_init_listen_cpl_handlers(struct adapter *);
int t4_listen_start(struct toedev *, struct tcpcb *);
int t4_listen_stop(struct toedev *, struct tcpcb *);
void t4_syncache_added(struct toedev *, void *);
void t4_syncache_removed(struct toedev *, void *);
int t4_syncache_respond(struct toedev *, void *, struct mbuf *);
int do_abort_req_synqe(struct sge_iq *, const struct rss_header *,
struct mbuf *);
int do_abort_rpl_synqe(struct sge_iq *, const struct rss_header *,
struct mbuf *);
void t4_offload_socket(struct toedev *, void *, struct socket *);
/* t4_cpl_io.c */
void t4_init_cpl_io_handlers(struct adapter *);
void send_abort_rpl(struct adapter *, struct sge_wrq *, int , int);
void send_flowc_wr(struct toepcb *, struct flowc_tx_params *);
void send_reset(struct adapter *, struct toepcb *, uint32_t);
void make_established(struct toepcb *, uint32_t, uint32_t, uint16_t);
void t4_rcvd(struct toedev *, struct tcpcb *);
int t4_tod_output(struct toedev *, struct tcpcb *);
int t4_send_fin(struct toedev *, struct tcpcb *);
int t4_send_rst(struct toedev *, struct tcpcb *);
#endif