| Current Path : /sys/dev/cxgbe/tom/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/dev/cxgbe/tom/t4_tom.c |
/*-
* 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: release/9.1.0/sys/dev/cxgbe/tom/t4_tom.c 237263 2012-06-19 07:34:13Z np $");
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/types.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 <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/ip.h>
#include <netinet/tcp_var.h>
#define TCPSTATES
#include <netinet/tcp_fsm.h>
#include <netinet/toecore.h>
#ifdef TCP_OFFLOAD
#include "common/common.h"
#include "common/t4_msg.h"
#include "common/t4_regs.h"
#include "tom/t4_tom_l2t.h"
#include "tom/t4_tom.h"
/* Module ops */
static int t4_tom_mod_load(void);
static int t4_tom_mod_unload(void);
static int t4_tom_modevent(module_t, int, void *);
/* ULD ops and helpers */
static int t4_tom_activate(struct adapter *);
static int t4_tom_deactivate(struct adapter *);
static struct uld_info tom_uld_info = {
.uld_id = ULD_TOM,
.activate = t4_tom_activate,
.deactivate = t4_tom_deactivate,
};
static void queue_tid_release(struct adapter *, int);
static void release_offload_resources(struct toepcb *);
static int alloc_tid_tabs(struct tid_info *);
static void free_tid_tabs(struct tid_info *);
static void free_tom_data(struct adapter *, struct tom_data *);
struct toepcb *
alloc_toepcb(struct port_info *pi, int txqid, int rxqid, int flags)
{
struct adapter *sc = pi->adapter;
struct toepcb *toep;
int tx_credits, txsd_total, len;
/*
* The firmware counts tx work request credits in units of 16 bytes
* each. Reserve room for an ABORT_REQ so the driver never has to worry
* about tx credits if it wants to abort a connection.
*/
tx_credits = sc->params.ofldq_wr_cred;
tx_credits -= howmany(sizeof(struct cpl_abort_req), 16);
/*
* Shortest possible tx work request is a fw_ofld_tx_data_wr + 1 byte
* immediate payload, and firmware counts tx work request credits in
* units of 16 byte. Calculate the maximum work requests possible.
*/
txsd_total = tx_credits /
howmany((sizeof(struct fw_ofld_tx_data_wr) + 1), 16);
if (txqid < 0)
txqid = (arc4random() % pi->nofldtxq) + pi->first_ofld_txq;
KASSERT(txqid >= pi->first_ofld_txq &&
txqid < pi->first_ofld_txq + pi->nofldtxq,
("%s: txqid %d for port %p (first %d, n %d)", __func__, txqid, pi,
pi->first_ofld_txq, pi->nofldtxq));
if (rxqid < 0)
rxqid = (arc4random() % pi->nofldrxq) + pi->first_ofld_rxq;
KASSERT(rxqid >= pi->first_ofld_rxq &&
rxqid < pi->first_ofld_rxq + pi->nofldrxq,
("%s: rxqid %d for port %p (first %d, n %d)", __func__, rxqid, pi,
pi->first_ofld_rxq, pi->nofldrxq));
len = offsetof(struct toepcb, txsd) +
txsd_total * sizeof(struct ofld_tx_sdesc);
toep = malloc(len, M_CXGBE, M_ZERO | flags);
if (toep == NULL)
return (NULL);
toep->td = sc->tom_softc;
toep->port = pi;
toep->tx_credits = tx_credits;
toep->ofld_txq = &sc->sge.ofld_txq[txqid];
toep->ofld_rxq = &sc->sge.ofld_rxq[rxqid];
toep->ctrlq = &sc->sge.ctrlq[pi->port_id];
toep->txsd_total = txsd_total;
toep->txsd_avail = txsd_total;
toep->txsd_pidx = 0;
toep->txsd_cidx = 0;
return (toep);
}
void
free_toepcb(struct toepcb *toep)
{
KASSERT(toepcb_flag(toep, TPF_ATTACHED) == 0,
("%s: attached to an inpcb", __func__));
KASSERT(toepcb_flag(toep, TPF_CPL_PENDING) == 0,
("%s: CPL pending", __func__));
free(toep, M_CXGBE);
}
/*
* Set up the socket for TCP offload.
*/
void
offload_socket(struct socket *so, struct toepcb *toep)
{
struct tom_data *td = toep->td;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp = intotcpcb(inp);
struct sockbuf *sb;
INP_WLOCK_ASSERT(inp);
/* Update socket */
sb = &so->so_snd;
SOCKBUF_LOCK(sb);
sb->sb_flags |= SB_NOCOALESCE;
SOCKBUF_UNLOCK(sb);
sb = &so->so_rcv;
SOCKBUF_LOCK(sb);
sb->sb_flags |= SB_NOCOALESCE;
SOCKBUF_UNLOCK(sb);
/* Update TCP PCB */
tp->tod = &td->tod;
tp->t_toe = toep;
tp->t_flags |= TF_TOE;
/* Install an extra hold on inp */
toep->inp = inp;
toepcb_set_flag(toep, TPF_ATTACHED);
in_pcbref(inp);
/* Add the TOE PCB to the active list */
mtx_lock(&td->toep_list_lock);
TAILQ_INSERT_HEAD(&td->toep_list, toep, link);
mtx_unlock(&td->toep_list_lock);
}
/* This is _not_ the normal way to "unoffload" a socket. */
void
undo_offload_socket(struct socket *so)
{
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp = intotcpcb(inp);
struct toepcb *toep = tp->t_toe;
struct tom_data *td = toep->td;
struct sockbuf *sb;
INP_WLOCK_ASSERT(inp);
sb = &so->so_snd;
SOCKBUF_LOCK(sb);
sb->sb_flags &= ~SB_NOCOALESCE;
SOCKBUF_UNLOCK(sb);
sb = &so->so_rcv;
SOCKBUF_LOCK(sb);
sb->sb_flags &= ~SB_NOCOALESCE;
SOCKBUF_UNLOCK(sb);
tp->tod = NULL;
tp->t_toe = NULL;
tp->t_flags &= ~TF_TOE;
toep->inp = NULL;
toepcb_clr_flag(toep, TPF_ATTACHED);
if (in_pcbrele_wlocked(inp))
panic("%s: inp freed.", __func__);
mtx_lock(&td->toep_list_lock);
TAILQ_REMOVE(&td->toep_list, toep, link);
mtx_unlock(&td->toep_list_lock);
}
static void
release_offload_resources(struct toepcb *toep)
{
struct tom_data *td = toep->td;
struct adapter *sc = td_adapter(td);
int tid = toep->tid;
KASSERT(toepcb_flag(toep, TPF_CPL_PENDING) == 0,
("%s: %p has CPL pending.", __func__, toep));
KASSERT(toepcb_flag(toep, TPF_ATTACHED) == 0,
("%s: %p is still attached.", __func__, toep));
CTR4(KTR_CXGBE, "%s: toep %p (tid %d, l2te %p)",
__func__, toep, tid, toep->l2te);
if (toep->l2te)
t4_l2t_release(toep->l2te);
if (tid >= 0) {
remove_tid(sc, tid);
release_tid(sc, tid, toep->ctrlq);
}
mtx_lock(&td->toep_list_lock);
TAILQ_REMOVE(&td->toep_list, toep, link);
mtx_unlock(&td->toep_list_lock);
free_toepcb(toep);
}
/*
* The kernel is done with the TCP PCB and this is our opportunity to unhook the
* toepcb hanging off of it. If the TOE driver is also done with the toepcb (no
* pending CPL) then it is time to release all resources tied to the toepcb.
*
* Also gets called when an offloaded active open fails and the TOM wants the
* kernel to take the TCP PCB back.
*/
static void
t4_pcb_detach(struct toedev *tod __unused, struct tcpcb *tp)
{
#if defined(KTR) || defined(INVARIANTS)
struct inpcb *inp = tp->t_inpcb;
#endif
struct toepcb *toep = tp->t_toe;
INP_WLOCK_ASSERT(inp);
KASSERT(toep != NULL, ("%s: toep is NULL", __func__));
KASSERT(toepcb_flag(toep, TPF_ATTACHED),
("%s: not attached", __func__));
#ifdef KTR
if (tp->t_state == TCPS_SYN_SENT) {
CTR6(KTR_CXGBE, "%s: atid %d, toep %p (0x%x), inp %p (0x%x)",
__func__, toep->tid, toep, toep->flags, inp,
inp->inp_flags);
} else {
CTR6(KTR_CXGBE,
"t4_pcb_detach: tid %d (%s), toep %p (0x%x), inp %p (0x%x)",
toep->tid, tcpstates[tp->t_state], toep, toep->flags, inp,
inp->inp_flags);
}
#endif
tp->t_toe = NULL;
tp->t_flags &= ~TF_TOE;
toepcb_clr_flag(toep, TPF_ATTACHED);
if (toepcb_flag(toep, TPF_CPL_PENDING) == 0)
release_offload_resources(toep);
}
/*
* The TOE driver will not receive any more CPLs for the tid associated with the
* toepcb; release the hold on the inpcb.
*/
void
final_cpl_received(struct toepcb *toep)
{
struct inpcb *inp = toep->inp;
KASSERT(inp != NULL, ("%s: inp is NULL", __func__));
INP_WLOCK_ASSERT(inp);
KASSERT(toepcb_flag(toep, TPF_CPL_PENDING),
("%s: CPL not pending already?", __func__));
CTR6(KTR_CXGBE, "%s: tid %d, toep %p (0x%x), inp %p (0x%x)",
__func__, toep->tid, toep, toep->flags, inp, inp->inp_flags);
toep->inp = NULL;
toepcb_clr_flag(toep, TPF_CPL_PENDING);
if (toepcb_flag(toep, TPF_ATTACHED) == 0)
release_offload_resources(toep);
if (!in_pcbrele_wlocked(inp))
INP_WUNLOCK(inp);
}
void
insert_tid(struct adapter *sc, int tid, void *ctx)
{
struct tid_info *t = &sc->tids;
t->tid_tab[tid] = ctx;
atomic_add_int(&t->tids_in_use, 1);
}
void *
lookup_tid(struct adapter *sc, int tid)
{
struct tid_info *t = &sc->tids;
return (t->tid_tab[tid]);
}
void
update_tid(struct adapter *sc, int tid, void *ctx)
{
struct tid_info *t = &sc->tids;
t->tid_tab[tid] = ctx;
}
void
remove_tid(struct adapter *sc, int tid)
{
struct tid_info *t = &sc->tids;
t->tid_tab[tid] = NULL;
atomic_subtract_int(&t->tids_in_use, 1);
}
void
release_tid(struct adapter *sc, int tid, struct sge_wrq *ctrlq)
{
struct wrqe *wr;
struct cpl_tid_release *req;
wr = alloc_wrqe(sizeof(*req), ctrlq);
if (wr == NULL) {
queue_tid_release(sc, tid); /* defer */
return;
}
req = wrtod(wr);
INIT_TP_WR_MIT_CPL(req, CPL_TID_RELEASE, tid);
t4_wrq_tx(sc, wr);
}
static void
queue_tid_release(struct adapter *sc, int tid)
{
CXGBE_UNIMPLEMENTED("deferred tid release");
}
/*
* What mtu_idx to use, given a 4-tuple and/or an MSS cap
*/
int
find_best_mtu_idx(struct adapter *sc, struct in_conninfo *inc, int pmss)
{
unsigned short *mtus = &sc->params.mtus[0];
int i = 0, mss;
KASSERT(inc != NULL || pmss > 0,
("%s: at least one of inc/pmss must be specified", __func__));
mss = inc ? tcp_mssopt(inc) : pmss;
if (pmss > 0 && mss > pmss)
mss = pmss;
while (i < NMTUS - 1 && mtus[i + 1] <= mss + 40)
++i;
return (i);
}
/*
* Determine the receive window size for a socket.
*/
u_long
select_rcv_wnd(struct socket *so)
{
unsigned long wnd;
SOCKBUF_LOCK_ASSERT(&so->so_rcv);
wnd = sbspace(&so->so_rcv);
if (wnd < MIN_RCV_WND)
wnd = MIN_RCV_WND;
return min(wnd, MAX_RCV_WND);
}
int
select_rcv_wscale(void)
{
int wscale = 0;
unsigned long space = sb_max;
if (space > MAX_RCV_WND)
space = MAX_RCV_WND;
while (wscale < TCP_MAX_WINSHIFT && (TCP_MAXWIN << wscale) < space)
wscale++;
return (wscale);
}
extern int always_keepalive;
#define VIID_SMACIDX(v) (((unsigned int)(v) & 0x7f) << 1)
/*
* socket so could be a listening socket too.
*/
uint64_t
calc_opt0(struct socket *so, struct port_info *pi, struct l2t_entry *e,
int mtu_idx, int rscale, int rx_credits, int ulp_mode)
{
uint64_t opt0;
KASSERT(rx_credits <= M_RCV_BUFSIZ,
("%s: rcv_bufsiz too high", __func__));
opt0 = F_TCAM_BYPASS | V_WND_SCALE(rscale) | V_MSS_IDX(mtu_idx) |
V_ULP_MODE(ulp_mode) | V_RCV_BUFSIZ(rx_credits);
if (so != NULL) {
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp = intotcpcb(inp);
int keepalive = always_keepalive ||
so_options_get(so) & SO_KEEPALIVE;
opt0 |= V_NAGLE((tp->t_flags & TF_NODELAY) == 0);
opt0 |= V_KEEP_ALIVE(keepalive != 0);
}
if (e != NULL)
opt0 |= V_L2T_IDX(e->idx);
if (pi != NULL) {
opt0 |= V_SMAC_SEL(VIID_SMACIDX(pi->viid));
opt0 |= V_TX_CHAN(pi->tx_chan);
}
return htobe64(opt0);
}
#define FILTER_SEL_WIDTH_P_FC (3 + 1)
#define FILTER_SEL_WIDTH_VIN_P_FC (6 + 7 + FILTER_SEL_WIDTH_P_FC)
#define FILTER_SEL_WIDTH_TAG_P_FC (3 + FILTER_SEL_WIDTH_VIN_P_FC)
#define FILTER_SEL_WIDTH_VLD_TAG_P_FC (1 + FILTER_SEL_WIDTH_TAG_P_FC)
#define VLAN_NONE 0xfff
#define FILTER_SEL_VLAN_NONE 0xffff
uint32_t
select_ntuple(struct port_info *pi, struct l2t_entry *e, uint32_t filter_mode)
{
uint16_t viid = pi->viid;
uint32_t ntuple = 0;
if (filter_mode == HW_TPL_FR_MT_PR_IV_P_FC) {
if (e->vlan == VLAN_NONE)
ntuple |= FILTER_SEL_VLAN_NONE << FILTER_SEL_WIDTH_P_FC;
else {
ntuple |= e->vlan << FILTER_SEL_WIDTH_P_FC;
ntuple |= 1 << FILTER_SEL_WIDTH_VLD_TAG_P_FC;
}
ntuple |= e->lport << S_PORT;
ntuple |= IPPROTO_TCP << FILTER_SEL_WIDTH_VLD_TAG_P_FC;
} else if (filter_mode == HW_TPL_FR_MT_PR_OV_P_FC) {
ntuple |= G_FW_VIID_VIN(viid) << FILTER_SEL_WIDTH_P_FC;
ntuple |= G_FW_VIID_PFN(viid) << FILTER_SEL_WIDTH_VIN_P_FC;
ntuple |= G_FW_VIID_VIVLD(viid) << FILTER_SEL_WIDTH_TAG_P_FC;
ntuple |= e->lport << S_PORT;
ntuple |= IPPROTO_TCP << FILTER_SEL_WIDTH_VLD_TAG_P_FC;
}
return (htobe32(ntuple));
}
static int
alloc_tid_tabs(struct tid_info *t)
{
size_t size;
unsigned int i;
size = t->ntids * sizeof(*t->tid_tab) +
t->natids * sizeof(*t->atid_tab) +
t->nstids * sizeof(*t->stid_tab);
t->tid_tab = malloc(size, M_CXGBE, M_ZERO | M_NOWAIT);
if (t->tid_tab == NULL)
return (ENOMEM);
mtx_init(&t->atid_lock, "atid lock", NULL, MTX_DEF);
t->atid_tab = (union aopen_entry *)&t->tid_tab[t->ntids];
t->afree = t->atid_tab;
t->atids_in_use = 0;
for (i = 1; i < t->natids; i++)
t->atid_tab[i - 1].next = &t->atid_tab[i];
t->atid_tab[t->natids - 1].next = NULL;
mtx_init(&t->stid_lock, "stid lock", NULL, MTX_DEF);
t->stid_tab = (union serv_entry *)&t->atid_tab[t->natids];
t->sfree = t->stid_tab;
t->stids_in_use = 0;
for (i = 1; i < t->nstids; i++)
t->stid_tab[i - 1].next = &t->stid_tab[i];
t->stid_tab[t->nstids - 1].next = NULL;
atomic_store_rel_int(&t->tids_in_use, 0);
return (0);
}
static void
free_tid_tabs(struct tid_info *t)
{
KASSERT(t->tids_in_use == 0,
("%s: %d tids still in use.", __func__, t->tids_in_use));
KASSERT(t->atids_in_use == 0,
("%s: %d atids still in use.", __func__, t->atids_in_use));
KASSERT(t->stids_in_use == 0,
("%s: %d tids still in use.", __func__, t->stids_in_use));
free(t->tid_tab, M_CXGBE);
t->tid_tab = NULL;
if (mtx_initialized(&t->atid_lock))
mtx_destroy(&t->atid_lock);
if (mtx_initialized(&t->stid_lock))
mtx_destroy(&t->stid_lock);
}
static void
free_tom_data(struct adapter *sc, struct tom_data *td)
{
KASSERT(TAILQ_EMPTY(&td->toep_list),
("%s: TOE PCB list is not empty.", __func__));
KASSERT(td->lctx_count == 0,
("%s: lctx hash table is not empty.", __func__));
t4_uninit_l2t_cpl_handlers(sc);
if (td->listen_mask != 0)
hashdestroy(td->listen_hash, M_CXGBE, td->listen_mask);
if (mtx_initialized(&td->lctx_hash_lock))
mtx_destroy(&td->lctx_hash_lock);
if (mtx_initialized(&td->toep_list_lock))
mtx_destroy(&td->toep_list_lock);
free_tid_tabs(&sc->tids);
free(td, M_CXGBE);
}
/*
* Ground control to Major TOM
* Commencing countdown, engines on
*/
static int
t4_tom_activate(struct adapter *sc)
{
struct tom_data *td;
struct toedev *tod;
int i, rc;
ADAPTER_LOCK_ASSERT_OWNED(sc); /* for sc->flags */
/* per-adapter softc for TOM */
td = malloc(sizeof(*td), M_CXGBE, M_ZERO | M_NOWAIT);
if (td == NULL)
return (ENOMEM);
/* List of TOE PCBs and associated lock */
mtx_init(&td->toep_list_lock, "PCB list lock", NULL, MTX_DEF);
TAILQ_INIT(&td->toep_list);
/* Listen context */
mtx_init(&td->lctx_hash_lock, "lctx hash lock", NULL, MTX_DEF);
td->listen_hash = hashinit_flags(LISTEN_HASH_SIZE, M_CXGBE,
&td->listen_mask, HASH_NOWAIT);
/* TID tables */
rc = alloc_tid_tabs(&sc->tids);
if (rc != 0)
goto done;
/* CPL handlers */
t4_init_connect_cpl_handlers(sc);
t4_init_l2t_cpl_handlers(sc);
t4_init_listen_cpl_handlers(sc);
t4_init_cpl_io_handlers(sc);
/* toedev ops */
tod = &td->tod;
init_toedev(tod);
tod->tod_softc = sc;
tod->tod_connect = t4_connect;
tod->tod_listen_start = t4_listen_start;
tod->tod_listen_stop = t4_listen_stop;
tod->tod_rcvd = t4_rcvd;
tod->tod_output = t4_tod_output;
tod->tod_send_rst = t4_send_rst;
tod->tod_send_fin = t4_send_fin;
tod->tod_pcb_detach = t4_pcb_detach;
tod->tod_l2_update = t4_l2_update;
tod->tod_syncache_added = t4_syncache_added;
tod->tod_syncache_removed = t4_syncache_removed;
tod->tod_syncache_respond = t4_syncache_respond;
tod->tod_offload_socket = t4_offload_socket;
for_each_port(sc, i)
TOEDEV(sc->port[i]->ifp) = &td->tod;
sc->tom_softc = td;
sc->flags |= TOM_INIT_DONE;
register_toedev(sc->tom_softc);
done:
if (rc != 0)
free_tom_data(sc, td);
return (rc);
}
static int
t4_tom_deactivate(struct adapter *sc)
{
int rc = 0;
struct tom_data *td = sc->tom_softc;
ADAPTER_LOCK_ASSERT_OWNED(sc); /* for sc->flags */
if (td == NULL)
return (0); /* XXX. KASSERT? */
if (sc->offload_map != 0)
return (EBUSY); /* at least one port has IFCAP_TOE enabled */
mtx_lock(&td->toep_list_lock);
if (!TAILQ_EMPTY(&td->toep_list))
rc = EBUSY;
mtx_unlock(&td->toep_list_lock);
mtx_lock(&td->lctx_hash_lock);
if (td->lctx_count > 0)
rc = EBUSY;
mtx_unlock(&td->lctx_hash_lock);
if (rc == 0) {
unregister_toedev(sc->tom_softc);
free_tom_data(sc, td);
sc->tom_softc = NULL;
sc->flags &= ~TOM_INIT_DONE;
}
return (rc);
}
static int
t4_tom_mod_load(void)
{
int rc;
rc = t4_register_uld(&tom_uld_info);
if (rc != 0)
t4_tom_mod_unload();
return (rc);
}
static void
tom_uninit(struct adapter *sc, void *arg __unused)
{
/* Try to free resources (works only if no port has IFCAP_TOE) */
ADAPTER_LOCK(sc);
if (sc->flags & TOM_INIT_DONE)
t4_deactivate_uld(sc, ULD_TOM);
ADAPTER_UNLOCK(sc);
}
static int
t4_tom_mod_unload(void)
{
t4_iterate(tom_uninit, NULL);
if (t4_unregister_uld(&tom_uld_info) == EBUSY)
return (EBUSY);
return (0);
}
#endif /* TCP_OFFLOAD */
static int
t4_tom_modevent(module_t mod, int cmd, void *arg)
{
int rc = 0;
#ifdef TCP_OFFLOAD
switch (cmd) {
case MOD_LOAD:
rc = t4_tom_mod_load();
break;
case MOD_UNLOAD:
rc = t4_tom_mod_unload();
break;
default:
rc = EINVAL;
}
#else
printf("t4_tom: compiled without TCP_OFFLOAD support.\n");
rc = EOPNOTSUPP;
#endif
return (rc);
}
static moduledata_t t4_tom_moddata= {
"t4_tom",
t4_tom_modevent,
0
};
MODULE_VERSION(t4_tom, 1);
MODULE_DEPEND(t4_tom, toecore, 1, 1, 1);
MODULE_DEPEND(t4_tom, t4nex, 1, 1, 1);
DECLARE_MODULE(t4_tom, t4_tom_moddata, SI_SUB_EXEC, SI_ORDER_ANY);