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freebsd-dev/sys/dev/cxgbe/tom/t4_connect.c
Pedro F. Giffuni 718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#ifdef TCP_OFFLOAD
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/module.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/ip.h>
#define TCPSTATES
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_var.h>
#include <netinet/toecore.h>
#include "common/common.h"
#include "common/t4_msg.h"
#include "common/t4_regs.h"
#include "common/t4_regs_values.h"
#include "tom/t4_tom_l2t.h"
#include "tom/t4_tom.h"
/* atid services */
static int alloc_atid(struct adapter *, void *);
static void *lookup_atid(struct adapter *, int);
static void free_atid(struct adapter *, int);
static int
alloc_atid(struct adapter *sc, void *ctx)
{
struct tid_info *t = &sc->tids;
int atid = -1;
mtx_lock(&t->atid_lock);
if (t->afree) {
union aopen_entry *p = t->afree;
atid = p - t->atid_tab;
t->afree = p->next;
p->data = ctx;
t->atids_in_use++;
}
mtx_unlock(&t->atid_lock);
return (atid);
}
static void *
lookup_atid(struct adapter *sc, int atid)
{
struct tid_info *t = &sc->tids;
return (t->atid_tab[atid].data);
}
static void
free_atid(struct adapter *sc, int atid)
{
struct tid_info *t = &sc->tids;
union aopen_entry *p = &t->atid_tab[atid];
mtx_lock(&t->atid_lock);
p->next = t->afree;
t->afree = p;
t->atids_in_use--;
mtx_unlock(&t->atid_lock);
}
/*
* Active open succeeded.
*/
static int
do_act_establish(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_act_establish *cpl = (const void *)(rss + 1);
u_int tid = GET_TID(cpl);
u_int atid = G_TID_TID(ntohl(cpl->tos_atid));
struct toepcb *toep = lookup_atid(sc, atid);
struct inpcb *inp = toep->inp;
KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__));
KASSERT(toep->tid == atid, ("%s: toep tid/atid mismatch", __func__));
CTR3(KTR_CXGBE, "%s: atid %u, tid %u", __func__, atid, tid);
free_atid(sc, atid);
CURVNET_SET(toep->vnet);
INP_WLOCK(inp);
toep->tid = tid;
insert_tid(sc, tid, toep, inp->inp_vflag & INP_IPV6 ? 2 : 1);
if (inp->inp_flags & INP_DROPPED) {
/* socket closed by the kernel before hw told us it connected */
send_flowc_wr(toep, NULL);
send_reset(sc, toep, be32toh(cpl->snd_isn));
goto done;
}
make_established(toep, cpl->snd_isn, cpl->rcv_isn, cpl->tcp_opt);
done:
INP_WUNLOCK(inp);
CURVNET_RESTORE();
return (0);
}
/*
* Convert an ACT_OPEN_RPL status to an errno.
*/
static inline int
act_open_rpl_status_to_errno(int status)
{
switch (status) {
case CPL_ERR_CONN_RESET:
return (ECONNREFUSED);
case CPL_ERR_ARP_MISS:
return (EHOSTUNREACH);
case CPL_ERR_CONN_TIMEDOUT:
return (ETIMEDOUT);
case CPL_ERR_TCAM_FULL:
return (EAGAIN);
case CPL_ERR_CONN_EXIST:
log(LOG_ERR, "ACTIVE_OPEN_RPL: 4-tuple in use\n");
return (EAGAIN);
default:
return (EIO);
}
}
void
act_open_failure_cleanup(struct adapter *sc, u_int atid, u_int status)
{
struct toepcb *toep = lookup_atid(sc, atid);
struct inpcb *inp = toep->inp;
struct toedev *tod = &toep->td->tod;
free_atid(sc, atid);
toep->tid = -1;
CURVNET_SET(toep->vnet);
if (status != EAGAIN)
INP_INFO_RLOCK(&V_tcbinfo);
INP_WLOCK(inp);
toe_connect_failed(tod, inp, status);
final_cpl_received(toep); /* unlocks inp */
if (status != EAGAIN)
INP_INFO_RUNLOCK(&V_tcbinfo);
CURVNET_RESTORE();
}
/*
* Active open failed.
*/
static int
do_act_open_rpl(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_act_open_rpl *cpl = (const void *)(rss + 1);
u_int atid = G_TID_TID(G_AOPEN_ATID(be32toh(cpl->atid_status)));
u_int status = G_AOPEN_STATUS(be32toh(cpl->atid_status));
struct toepcb *toep = lookup_atid(sc, atid);
int rc;
KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__));
KASSERT(toep->tid == atid, ("%s: toep tid/atid mismatch", __func__));
CTR3(KTR_CXGBE, "%s: atid %u, status %u ", __func__, atid, status);
/* Ignore negative advice */
if (negative_advice(status))
return (0);
if (status && act_open_has_tid(status))
release_tid(sc, GET_TID(cpl), toep->ctrlq);
rc = act_open_rpl_status_to_errno(status);
act_open_failure_cleanup(sc, atid, rc);
return (0);
}
/*
* Options2 for active open.
*/
static uint32_t
calc_opt2a(struct socket *so, struct toepcb *toep)
{
struct tcpcb *tp = so_sototcpcb(so);
struct port_info *pi = toep->vi->pi;
struct adapter *sc = pi->adapter;
uint32_t opt2;
opt2 = V_TX_QUEUE(sc->params.tp.tx_modq[pi->tx_chan]) |
F_RSS_QUEUE_VALID | V_RSS_QUEUE(toep->ofld_rxq->iq.abs_id);
if (tp->t_flags & TF_SACK_PERMIT)
opt2 |= F_SACK_EN;
if (tp->t_flags & TF_REQ_TSTMP)
opt2 |= F_TSTAMPS_EN;
if (tp->t_flags & TF_REQ_SCALE)
opt2 |= F_WND_SCALE_EN;
if (V_tcp_do_ecn)
opt2 |= F_CCTRL_ECN;
/* RX_COALESCE is always a valid value (M_RX_COALESCE). */
if (is_t4(sc))
opt2 |= F_RX_COALESCE_VALID;
else {
opt2 |= F_T5_OPT_2_VALID;
opt2 |= F_T5_ISS;
}
if (sc->tt.rx_coalesce)
opt2 |= V_RX_COALESCE(M_RX_COALESCE);
if (sc->tt.cong_algorithm != -1)
opt2 |= V_CONG_CNTRL(sc->tt.cong_algorithm & M_CONG_CNTRL);
#ifdef USE_DDP_RX_FLOW_CONTROL
if (toep->ulp_mode == ULP_MODE_TCPDDP)
opt2 |= F_RX_FC_VALID | F_RX_FC_DDP;
#endif
return (htobe32(opt2));
}
void
t4_init_connect_cpl_handlers(void)
{
t4_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
t4_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
}
void
t4_uninit_connect_cpl_handlers(void)
{
t4_register_cpl_handler(CPL_ACT_ESTABLISH, NULL);
t4_register_cpl_handler(CPL_ACT_OPEN_RPL, NULL);
}
#define DONT_OFFLOAD_ACTIVE_OPEN(x) do { \
reason = __LINE__; \
rc = (x); \
goto failed; \
} while (0)
static inline int
act_open_cpl_size(struct adapter *sc, int isipv6)
{
int idx;
static const int sz_table[3][2] = {
{
sizeof (struct cpl_act_open_req),
sizeof (struct cpl_act_open_req6)
},
{
sizeof (struct cpl_t5_act_open_req),
sizeof (struct cpl_t5_act_open_req6)
},
{
sizeof (struct cpl_t6_act_open_req),
sizeof (struct cpl_t6_act_open_req6)
},
};
MPASS(chip_id(sc) >= CHELSIO_T4);
idx = min(chip_id(sc) - CHELSIO_T4, 2);
return (sz_table[idx][!!isipv6]);
}
/*
* active open (soconnect).
*
* State of affairs on entry:
* soisconnecting (so_state |= SS_ISCONNECTING)
* tcbinfo not locked (This has changed - used to be WLOCKed)
* inp WLOCKed
* tp->t_state = TCPS_SYN_SENT
* rtalloc1, RT_UNLOCK on rt.
*/
int
t4_connect(struct toedev *tod, struct socket *so, struct rtentry *rt,
struct sockaddr *nam)
{
struct adapter *sc = tod->tod_softc;
struct tom_data *td = tod_td(tod);
struct toepcb *toep = NULL;
struct wrqe *wr = NULL;
struct ifnet *rt_ifp = rt->rt_ifp;
struct vi_info *vi;
int mtu_idx, rscale, qid_atid, rc, isipv6;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp = intotcpcb(inp);
int reason;
INP_WLOCK_ASSERT(inp);
KASSERT(nam->sa_family == AF_INET || nam->sa_family == AF_INET6,
("%s: dest addr %p has family %u", __func__, nam, nam->sa_family));
if (rt_ifp->if_type == IFT_ETHER)
vi = rt_ifp->if_softc;
else if (rt_ifp->if_type == IFT_L2VLAN) {
struct ifnet *ifp = VLAN_COOKIE(rt_ifp);
vi = ifp->if_softc;
} else if (rt_ifp->if_type == IFT_IEEE8023ADLAG)
DONT_OFFLOAD_ACTIVE_OPEN(ENOSYS); /* XXX: implement lagg+TOE */
else
DONT_OFFLOAD_ACTIVE_OPEN(ENOTSUP);
toep = alloc_toepcb(vi, -1, -1, M_NOWAIT | M_ZERO);
if (toep == NULL)
DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM);
toep->tid = alloc_atid(sc, toep);
if (toep->tid < 0)
DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM);
toep->l2te = t4_l2t_get(vi->pi, rt_ifp,
rt->rt_flags & RTF_GATEWAY ? rt->rt_gateway : nam);
if (toep->l2te == NULL)
DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM);
isipv6 = nam->sa_family == AF_INET6;
wr = alloc_wrqe(act_open_cpl_size(sc, isipv6), toep->ctrlq);
if (wr == NULL)
DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM);
toep->vnet = so->so_vnet;
if (sc->tt.ddp && (so->so_options & SO_NO_DDP) == 0)
set_tcpddp_ulp_mode(toep);
else
toep->ulp_mode = ULP_MODE_NONE;
SOCKBUF_LOCK(&so->so_rcv);
/* opt0 rcv_bufsiz initially, assumes its normal meaning later */
toep->rx_credits = min(select_rcv_wnd(so) >> 10, M_RCV_BUFSIZ);
SOCKBUF_UNLOCK(&so->so_rcv);
/*
* The kernel sets request_r_scale based on sb_max whereas we need to
* take hardware's MAX_RCV_WND into account too. This is normally a
* no-op as MAX_RCV_WND is much larger than the default sb_max.
*/
if (tp->t_flags & TF_REQ_SCALE)
rscale = tp->request_r_scale = select_rcv_wscale();
else
rscale = 0;
mtu_idx = find_best_mtu_idx(sc, &inp->inp_inc, 0);
qid_atid = (toep->ofld_rxq->iq.abs_id << 14) | toep->tid;
if (isipv6) {
struct cpl_act_open_req6 *cpl = wrtod(wr);
struct cpl_t5_act_open_req6 *cpl5 = (void *)cpl;
struct cpl_t6_act_open_req6 *cpl6 = (void *)cpl;
if ((inp->inp_vflag & INP_IPV6) == 0)
DONT_OFFLOAD_ACTIVE_OPEN(ENOTSUP);
toep->ce = hold_lip(td, &inp->in6p_laddr, NULL);
if (toep->ce == NULL)
DONT_OFFLOAD_ACTIVE_OPEN(ENOENT);
switch (chip_id(sc)) {
case CHELSIO_T4:
INIT_TP_WR(cpl, 0);
cpl->params = select_ntuple(vi, toep->l2te);
break;
case CHELSIO_T5:
INIT_TP_WR(cpl5, 0);
cpl5->iss = htobe32(tp->iss);
cpl5->params = select_ntuple(vi, toep->l2te);
break;
case CHELSIO_T6:
default:
INIT_TP_WR(cpl6, 0);
cpl6->iss = htobe32(tp->iss);
cpl6->params = select_ntuple(vi, toep->l2te);
break;
}
OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
qid_atid));
cpl->local_port = inp->inp_lport;
cpl->local_ip_hi = *(uint64_t *)&inp->in6p_laddr.s6_addr[0];
cpl->local_ip_lo = *(uint64_t *)&inp->in6p_laddr.s6_addr[8];
cpl->peer_port = inp->inp_fport;
cpl->peer_ip_hi = *(uint64_t *)&inp->in6p_faddr.s6_addr[0];
cpl->peer_ip_lo = *(uint64_t *)&inp->in6p_faddr.s6_addr[8];
cpl->opt0 = calc_opt0(so, vi, toep->l2te, mtu_idx, rscale,
toep->rx_credits, toep->ulp_mode);
cpl->opt2 = calc_opt2a(so, toep);
} else {
struct cpl_act_open_req *cpl = wrtod(wr);
struct cpl_t5_act_open_req *cpl5 = (void *)cpl;
struct cpl_t6_act_open_req *cpl6 = (void *)cpl;
switch (chip_id(sc)) {
case CHELSIO_T4:
INIT_TP_WR(cpl, 0);
cpl->params = select_ntuple(vi, toep->l2te);
break;
case CHELSIO_T5:
INIT_TP_WR(cpl5, 0);
cpl5->iss = htobe32(tp->iss);
cpl5->params = select_ntuple(vi, toep->l2te);
break;
case CHELSIO_T6:
default:
INIT_TP_WR(cpl6, 0);
cpl6->iss = htobe32(tp->iss);
cpl6->params = select_ntuple(vi, toep->l2te);
break;
}
OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
qid_atid));
inp_4tuple_get(inp, &cpl->local_ip, &cpl->local_port,
&cpl->peer_ip, &cpl->peer_port);
cpl->opt0 = calc_opt0(so, vi, toep->l2te, mtu_idx, rscale,
toep->rx_credits, toep->ulp_mode);
cpl->opt2 = calc_opt2a(so, toep);
}
CTR5(KTR_CXGBE, "%s: atid %u (%s), toep %p, inp %p", __func__,
toep->tid, tcpstates[tp->t_state], toep, inp);
offload_socket(so, toep);
rc = t4_l2t_send(sc, wr, toep->l2te);
if (rc == 0) {
toep->flags |= TPF_CPL_PENDING;
return (0);
}
undo_offload_socket(so);
reason = __LINE__;
failed:
CTR3(KTR_CXGBE, "%s: not offloading (%d), rc %d", __func__, reason, rc);
if (wr)
free_wrqe(wr);
if (toep) {
if (toep->tid >= 0)
free_atid(sc, toep->tid);
if (toep->l2te)
t4_l2t_release(toep->l2te);
if (toep->ce)
release_lip(td, toep->ce);
free_toepcb(toep);
}
return (rc);
}
#endif
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