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freebsd-skq/sys/dev/cxgbe/iw_cxgbe/cm.c
Navdeep Parhar 7df135c055 cxgbe/iw_cxgbe: Various fixes to the iWARP driver. 
- Return appropriate error code instead of ENOMEM when sosend() fails in
  send_mpa_req.
- Fix for problematic race during destroy_qp.
- Abortive close in the failure of send_mpa_reject() instead of normal close.
- Remove the unnecessary doorbell flowcontrol logic.

Submitted by:	Krishnamraju Eraparaju at Chelsio
MFC after:	1 month
Sponsored by:	Chelsio communications
2016-08-26 17:38:13 +00:00

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/*
* Copyright (c) 2009-2013, 2016 Chelsio, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#ifdef TCP_OFFLOAD
#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sockio.h>
#include <sys/taskqueue.h>
#include <netinet/in.h>
#include <net/route.h>
#include <netinet/in_systm.h>
#include <netinet/in_pcb.h>
#include <netinet/ip.h>
#include <netinet/in_fib.h>
#include <netinet/ip_var.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcpip.h>
#include <netinet/toecore.h>
struct sge_iq;
struct rss_header;
struct cpl_set_tcb_rpl;
#include <linux/types.h>
#include "offload.h"
#include "tom/t4_tom.h"
#define TOEPCB(so) ((struct toepcb *)(so_sototcpcb((so))->t_toe))
#include "iw_cxgbe.h"
#include <linux/module.h>
#include <linux/workqueue.h>
#include <linux/notifier.h>
#include <linux/inetdevice.h>
#include <linux/if_vlan.h>
#include <net/netevent.h>
static spinlock_t req_lock;
static TAILQ_HEAD(c4iw_ep_list, c4iw_ep_common) req_list;
static struct work_struct c4iw_task;
static struct workqueue_struct *c4iw_taskq;
static LIST_HEAD(timeout_list);
static spinlock_t timeout_lock;
static void process_req(struct work_struct *ctx);
static void start_ep_timer(struct c4iw_ep *ep);
static int stop_ep_timer(struct c4iw_ep *ep);
static int set_tcpinfo(struct c4iw_ep *ep);
static void process_timeout(struct c4iw_ep *ep);
static void process_timedout_eps(void);
static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc);
static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state tostate);
static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state tostate);
static void *alloc_ep(int size, gfp_t flags);
void __free_ep(struct c4iw_ep_common *epc);
static int find_route(__be32 local_ip, __be32 peer_ip, __be16 local_port,
__be16 peer_port, u8 tos, struct nhop4_extended *pnh4);
static int close_socket(struct c4iw_ep_common *epc, int close);
static int shutdown_socket(struct c4iw_ep_common *epc);
static void abort_socket(struct c4iw_ep *ep);
static int send_mpa_req(struct c4iw_ep *ep);
static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen);
static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen);
static void close_complete_upcall(struct c4iw_ep *ep, int status);
static int send_abort(struct c4iw_ep *ep);
static void peer_close_upcall(struct c4iw_ep *ep);
static void peer_abort_upcall(struct c4iw_ep *ep);
static void connect_reply_upcall(struct c4iw_ep *ep, int status);
static int connect_request_upcall(struct c4iw_ep *ep);
static void established_upcall(struct c4iw_ep *ep);
static int process_mpa_reply(struct c4iw_ep *ep);
static int process_mpa_request(struct c4iw_ep *ep);
static void process_peer_close(struct c4iw_ep *ep);
static void process_conn_error(struct c4iw_ep *ep);
static void process_close_complete(struct c4iw_ep *ep);
static void ep_timeout(unsigned long arg);
static void init_sock(struct c4iw_ep_common *epc);
static void process_data(struct c4iw_ep *ep);
static void process_connected(struct c4iw_ep *ep);
static int c4iw_so_upcall(struct socket *so, void *arg, int waitflag);
static void process_socket_event(struct c4iw_ep *ep);
static void release_ep_resources(struct c4iw_ep *ep);
#define START_EP_TIMER(ep) \
do { \
CTR3(KTR_IW_CXGBE, "start_ep_timer (%s:%d) ep %p", \
__func__, __LINE__, (ep)); \
start_ep_timer(ep); \
} while (0)
#define STOP_EP_TIMER(ep) \
({ \
CTR3(KTR_IW_CXGBE, "stop_ep_timer (%s:%d) ep %p", \
__func__, __LINE__, (ep)); \
stop_ep_timer(ep); \
})
#ifdef KTR
static char *states[] = {
"idle",
"listen",
"connecting",
"mpa_wait_req",
"mpa_req_sent",
"mpa_req_rcvd",
"mpa_rep_sent",
"fpdu_mode",
"aborting",
"closing",
"moribund",
"dead",
NULL,
};
#endif
static void deref_cm_id(struct c4iw_ep_common *epc)
{
epc->cm_id->rem_ref(epc->cm_id);
epc->cm_id = NULL;
set_bit(CM_ID_DEREFED, &epc->history);
}
static void ref_cm_id(struct c4iw_ep_common *epc)
{
set_bit(CM_ID_REFED, &epc->history);
epc->cm_id->add_ref(epc->cm_id);
}
static void deref_qp(struct c4iw_ep *ep)
{
c4iw_qp_rem_ref(&ep->com.qp->ibqp);
clear_bit(QP_REFERENCED, &ep->com.flags);
set_bit(QP_DEREFED, &ep->com.history);
}
static void ref_qp(struct c4iw_ep *ep)
{
set_bit(QP_REFERENCED, &ep->com.flags);
set_bit(QP_REFED, &ep->com.history);
c4iw_qp_add_ref(&ep->com.qp->ibqp);
}
static void process_timeout(struct c4iw_ep *ep)
{
struct c4iw_qp_attributes attrs;
int abort = 1;
mutex_lock(&ep->com.mutex);
CTR4(KTR_IW_CXGBE, "%s ep :%p, tid:%u, state %d", __func__,
ep, ep->hwtid, ep->com.state);
set_bit(TIMEDOUT, &ep->com.history);
switch (ep->com.state) {
case MPA_REQ_SENT:
connect_reply_upcall(ep, -ETIMEDOUT);
break;
case MPA_REQ_WAIT:
case MPA_REQ_RCVD:
case MPA_REP_SENT:
case FPDU_MODE:
break;
case CLOSING:
case MORIBUND:
if (ep->com.cm_id && ep->com.qp) {
attrs.next_state = C4IW_QP_STATE_ERROR;
c4iw_modify_qp(ep->com.dev, ep->com.qp,
C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
}
close_complete_upcall(ep, -ETIMEDOUT);
break;
case ABORTING:
case DEAD:
/*
* These states are expected if the ep timed out at the same
* time as another thread was calling stop_ep_timer().
* So we silently do nothing for these states.
*/
abort = 0;
break;
default:
CTR4(KTR_IW_CXGBE, "%s unexpected state ep %p tid %u state %u\n"
, __func__, ep, ep->hwtid, ep->com.state);
abort = 0;
}
mutex_unlock(&ep->com.mutex);
if (abort)
c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
c4iw_put_ep(&ep->com);
return;
}
static void process_timedout_eps(void)
{
struct c4iw_ep *ep;
spin_lock(&timeout_lock);
while (!list_empty(&timeout_list)) {
struct list_head *tmp;
tmp = timeout_list.next;
list_del(tmp);
tmp->next = tmp->prev = NULL;
spin_unlock(&timeout_lock);
ep = list_entry(tmp, struct c4iw_ep, entry);
process_timeout(ep);
spin_lock(&timeout_lock);
}
spin_unlock(&timeout_lock);
return;
}
static void
process_req(struct work_struct *ctx)
{
struct c4iw_ep_common *epc;
process_timedout_eps();
spin_lock(&req_lock);
while (!TAILQ_EMPTY(&req_list)) {
epc = TAILQ_FIRST(&req_list);
TAILQ_REMOVE(&req_list, epc, entry);
epc->entry.tqe_prev = NULL;
spin_unlock(&req_lock);
CTR3(KTR_IW_CXGBE, "%s so :%p, ep:%p", __func__,
epc->so, epc);
if (epc->so)
process_socket_event((struct c4iw_ep *)epc);
c4iw_put_ep(epc);
process_timedout_eps();
spin_lock(&req_lock);
}
spin_unlock(&req_lock);
}
/*
* XXX: doesn't belong here in the iWARP driver.
* XXX: assumes that the connection was offloaded by cxgbe/t4_tom if TF_TOE is
* set. Is this a valid assumption for active open?
*/
static int
set_tcpinfo(struct c4iw_ep *ep)
{
struct socket *so = ep->com.so;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
struct toepcb *toep;
int rc = 0;
INP_WLOCK(inp);
tp = intotcpcb(inp);
if ((tp->t_flags & TF_TOE) == 0) {
rc = EINVAL;
log(LOG_ERR, "%s: connection not offloaded (so %p, ep %p)\n",
__func__, so, ep);
goto done;
}
toep = TOEPCB(so);
ep->hwtid = toep->tid;
ep->snd_seq = tp->snd_nxt;
ep->rcv_seq = tp->rcv_nxt;
ep->emss = max(tp->t_maxseg, 128);
done:
INP_WUNLOCK(inp);
return (rc);
}
static int
find_route(__be32 local_ip, __be32 peer_ip, __be16 local_port,
__be16 peer_port, u8 tos, struct nhop4_extended *pnh4)
{
struct in_addr addr;
int err;
CTR5(KTR_IW_CXGBE, "%s:frtB %x, %x, %d, %d", __func__, local_ip,
peer_ip, ntohs(local_port), ntohs(peer_port));
addr.s_addr = peer_ip;
err = fib4_lookup_nh_ext(RT_DEFAULT_FIB, addr, NHR_REF, 0, pnh4);
CTR2(KTR_IW_CXGBE, "%s:frtE %d", __func__, err);
return err;
}
static int
close_socket(struct c4iw_ep_common *epc, int close)
{
struct socket *so = epc->so;
int rc;
CTR5(KTR_IW_CXGBE, "%s:csoB so %p, ep %p, state %s, tid %d", __func__,
so, epc, states[epc->state],
((struct c4iw_ep *)epc)->hwtid);
mutex_lock(&epc->so_mutex);
if ((so == NULL) || (so->so_count == 0)) {
mutex_unlock(&epc->so_mutex);
CTR5(KTR_IW_CXGBE, "%s:cso1 so %p, ep %p, state %s, tid %d",
__func__, so, epc, states[epc->state],
((struct c4iw_ep *)epc)->hwtid);
return -EINVAL;
}
SOCK_LOCK(so);
soupcall_clear(so, SO_RCV);
SOCK_UNLOCK(so);
if (close)
rc = soclose(so);
else
rc = soshutdown(so, SHUT_WR | SHUT_RD);
epc->so = NULL;
mutex_unlock(&epc->so_mutex);
return (rc);
}
static int
shutdown_socket(struct c4iw_ep_common *epc)
{
struct socket *so = epc->so;
int rc;
CTR5(KTR_IW_CXGBE, "%s:ssoB so %p, ep %p, state %s, tid %d", __func__,
epc->so, epc, states[epc->state],
((struct c4iw_ep *)epc)->hwtid);
mutex_lock(&epc->so_mutex);
if ((so == NULL) || (so->so_count == 0)) {
mutex_unlock(&epc->so_mutex);
CTR5(KTR_IW_CXGBE, "%s:sso1 so %p, ep %p, state %s, tid %d",
__func__, epc->so, epc, states[epc->state],
((struct c4iw_ep *)epc)->hwtid);
return -EINVAL;
}
rc = soshutdown(so, SHUT_WR);
mutex_unlock(&epc->so_mutex);
return rc;
}
static void
abort_socket(struct c4iw_ep *ep)
{
struct sockopt sopt;
int rc;
struct linger l;
CTR5(KTR_IW_CXGBE, "%s ep %p so %p state %s tid %d", __func__, ep,
ep->com.so, states[ep->com.state], ep->hwtid);
mutex_lock(&ep->com.so_mutex);
l.l_onoff = 1;
l.l_linger = 0;
/* linger_time of 0 forces RST to be sent */
sopt.sopt_dir = SOPT_SET;
sopt.sopt_level = SOL_SOCKET;
sopt.sopt_name = SO_LINGER;
sopt.sopt_val = (caddr_t)&l;
sopt.sopt_valsize = sizeof l;
sopt.sopt_td = NULL;
rc = sosetopt(ep->com.so, &sopt);
if (rc) {
log(LOG_ERR, "%s: can't set linger to 0, no RST! err %d\n",
__func__, rc);
}
mutex_unlock(&ep->com.so_mutex);
}
static void
process_peer_close(struct c4iw_ep *ep)
{
struct c4iw_qp_attributes attrs;
int disconnect = 1;
int release = 0;
CTR4(KTR_IW_CXGBE, "%s:ppcB ep %p so %p state %s", __func__, ep,
ep->com.so, states[ep->com.state]);
mutex_lock(&ep->com.mutex);
switch (ep->com.state) {
case MPA_REQ_WAIT:
CTR2(KTR_IW_CXGBE, "%s:ppc1 %p MPA_REQ_WAIT CLOSING",
__func__, ep);
__state_set(&ep->com, CLOSING);
break;
case MPA_REQ_SENT:
CTR2(KTR_IW_CXGBE, "%s:ppc2 %p MPA_REQ_SENT CLOSING",
__func__, ep);
__state_set(&ep->com, DEAD);
connect_reply_upcall(ep, -ECONNABORTED);
disconnect = 0;
STOP_EP_TIMER(ep);
close_socket(&ep->com, 0);
deref_cm_id(&ep->com);
release = 1;
break;
case MPA_REQ_RCVD:
/*
* We're gonna mark this puppy DEAD, but keep
* the reference on it until the ULP accepts or
* rejects the CR.
*/
CTR2(KTR_IW_CXGBE, "%s:ppc3 %p MPA_REQ_RCVD CLOSING",
__func__, ep);
__state_set(&ep->com, CLOSING);
c4iw_get_ep(&ep->com);
break;
case MPA_REP_SENT:
CTR2(KTR_IW_CXGBE, "%s:ppc4 %p MPA_REP_SENT CLOSING",
__func__, ep);
__state_set(&ep->com, CLOSING);
break;
case FPDU_MODE:
CTR2(KTR_IW_CXGBE, "%s:ppc5 %p FPDU_MODE CLOSING",
__func__, ep);
START_EP_TIMER(ep);
__state_set(&ep->com, CLOSING);
attrs.next_state = C4IW_QP_STATE_CLOSING;
c4iw_modify_qp(ep->com.dev, ep->com.qp,
C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
peer_close_upcall(ep);
break;
case ABORTING:
CTR2(KTR_IW_CXGBE, "%s:ppc6 %p ABORTING (disconn)",
__func__, ep);
disconnect = 0;
break;
case CLOSING:
CTR2(KTR_IW_CXGBE, "%s:ppc7 %p CLOSING MORIBUND",
__func__, ep);
__state_set(&ep->com, MORIBUND);
disconnect = 0;
break;
case MORIBUND:
CTR2(KTR_IW_CXGBE, "%s:ppc8 %p MORIBUND DEAD", __func__,
ep);
STOP_EP_TIMER(ep);
if (ep->com.cm_id && ep->com.qp) {
attrs.next_state = C4IW_QP_STATE_IDLE;
c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
}
close_socket(&ep->com, 0);
close_complete_upcall(ep, 0);
__state_set(&ep->com, DEAD);
release = 1;
disconnect = 0;
break;
case DEAD:
CTR2(KTR_IW_CXGBE, "%s:ppc9 %p DEAD (disconn)",
__func__, ep);
disconnect = 0;
break;
default:
panic("%s: ep %p state %d", __func__, ep,
ep->com.state);
break;
}
mutex_unlock(&ep->com.mutex);
if (disconnect) {
CTR2(KTR_IW_CXGBE, "%s:ppca %p", __func__, ep);
c4iw_ep_disconnect(ep, 0, M_NOWAIT);
}
if (release) {
CTR2(KTR_IW_CXGBE, "%s:ppcb %p", __func__, ep);
c4iw_put_ep(&ep->com);
}
CTR2(KTR_IW_CXGBE, "%s:ppcE %p", __func__, ep);
return;
}
static void
process_conn_error(struct c4iw_ep *ep)
{
struct c4iw_qp_attributes attrs;
int ret;
int state;
mutex_lock(&ep->com.mutex);
state = ep->com.state;
CTR5(KTR_IW_CXGBE, "%s:pceB ep %p so %p so->so_error %u state %s",
__func__, ep, ep->com.so, ep->com.so->so_error,
states[ep->com.state]);
switch (state) {
case MPA_REQ_WAIT:
STOP_EP_TIMER(ep);
break;
case MPA_REQ_SENT:
STOP_EP_TIMER(ep);
connect_reply_upcall(ep, -ECONNRESET);
break;
case MPA_REP_SENT:
ep->com.rpl_err = ECONNRESET;
CTR1(KTR_IW_CXGBE, "waking up ep %p", ep);
break;
case MPA_REQ_RCVD:
/*
* We're gonna mark this puppy DEAD, but keep
* the reference on it until the ULP accepts or
* rejects the CR.
*/
c4iw_get_ep(&ep->com);
break;
case MORIBUND:
case CLOSING:
STOP_EP_TIMER(ep);
/*FALLTHROUGH*/
case FPDU_MODE:
if (ep->com.cm_id && ep->com.qp) {
attrs.next_state = C4IW_QP_STATE_ERROR;
ret = c4iw_modify_qp(ep->com.qp->rhp,
ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
&attrs, 1);
if (ret)
log(LOG_ERR,
"%s - qp <- error failed!\n",
__func__);
}
peer_abort_upcall(ep);
break;
case ABORTING:
break;
case DEAD:
CTR2(KTR_IW_CXGBE, "%s so_error %d IN DEAD STATE!!!!",
__func__, ep->com.so->so_error);
mutex_unlock(&ep->com.mutex);
return;
default:
panic("%s: ep %p state %d", __func__, ep, state);
break;
}
if (state != ABORTING) {
if (ep->parent_ep) {
CTR2(KTR_IW_CXGBE, "%s:pce1 %p", __func__, ep);
close_socket(&ep->com, 1);
} else {
CTR2(KTR_IW_CXGBE, "%s:pce2 %p", __func__, ep);
close_socket(&ep->com, 0);
}
__state_set(&ep->com, DEAD);
c4iw_put_ep(&ep->com);
}
mutex_unlock(&ep->com.mutex);
CTR2(KTR_IW_CXGBE, "%s:pceE %p", __func__, ep);
return;
}
static void
process_close_complete(struct c4iw_ep *ep)
{
struct c4iw_qp_attributes attrs;
int release = 0;
CTR4(KTR_IW_CXGBE, "%s:pccB ep %p so %p state %s", __func__, ep,
ep->com.so, states[ep->com.state]);
/* The cm_id may be null if we failed to connect */
mutex_lock(&ep->com.mutex);
set_bit(CLOSE_CON_RPL, &ep->com.history);
switch (ep->com.state) {
case CLOSING:
CTR2(KTR_IW_CXGBE, "%s:pcc1 %p CLOSING MORIBUND",
__func__, ep);
__state_set(&ep->com, MORIBUND);
break;
case MORIBUND:
CTR2(KTR_IW_CXGBE, "%s:pcc1 %p MORIBUND DEAD", __func__,
ep);
STOP_EP_TIMER(ep);
if ((ep->com.cm_id) && (ep->com.qp)) {
CTR2(KTR_IW_CXGBE, "%s:pcc2 %p QP_STATE_IDLE",
__func__, ep);
attrs.next_state = C4IW_QP_STATE_IDLE;
c4iw_modify_qp(ep->com.dev,
ep->com.qp,
C4IW_QP_ATTR_NEXT_STATE,
&attrs, 1);
}
if (ep->parent_ep) {
CTR2(KTR_IW_CXGBE, "%s:pcc3 %p", __func__, ep);
close_socket(&ep->com, 1);
}
else {
CTR2(KTR_IW_CXGBE, "%s:pcc4 %p", __func__, ep);
close_socket(&ep->com, 0);
}
close_complete_upcall(ep, 0);
__state_set(&ep->com, DEAD);
release = 1;
break;
case ABORTING:
CTR2(KTR_IW_CXGBE, "%s:pcc5 %p ABORTING", __func__, ep);
break;
case DEAD:
CTR2(KTR_IW_CXGBE, "%s:pcc6 %p DEAD", __func__, ep);
break;
default:
CTR2(KTR_IW_CXGBE, "%s:pcc7 %p unknown ep state",
__func__, ep);
panic("%s:pcc6 %p unknown ep state", __func__, ep);
break;
}
mutex_unlock(&ep->com.mutex);
if (release) {
CTR2(KTR_IW_CXGBE, "%s:pcc8 %p", __func__, ep);
c4iw_put_ep(&ep->com);
}
CTR2(KTR_IW_CXGBE, "%s:pccE %p", __func__, ep);
return;
}
static void
init_sock(struct c4iw_ep_common *epc)
{
int rc;
struct sockopt sopt;
struct socket *so = epc->so;
int on = 1;
mutex_lock(&epc->so_mutex);
if ((so == NULL) || (so->so_count == 0)) {
mutex_unlock(&epc->so_mutex);
CTR5(KTR_IW_CXGBE, "%s:iso1 so %p, ep %p, state %s, tid %d",
__func__, so, epc, states[epc->state],
((struct c4iw_ep *)epc)->hwtid);
return;
}
SOCK_LOCK(so);
soupcall_set(so, SO_RCV, c4iw_so_upcall, epc);
so->so_state |= SS_NBIO;
SOCK_UNLOCK(so);
sopt.sopt_dir = SOPT_SET;
sopt.sopt_level = IPPROTO_TCP;
sopt.sopt_name = TCP_NODELAY;
sopt.sopt_val = (caddr_t)&on;
sopt.sopt_valsize = sizeof on;
sopt.sopt_td = NULL;
rc = sosetopt(so, &sopt);
if (rc) {
log(LOG_ERR, "%s: can't set TCP_NODELAY on so %p (%d)\n",
__func__, so, rc);
}
mutex_unlock(&epc->so_mutex);
}
static void
process_data(struct c4iw_ep *ep)
{
struct sockaddr_in *local, *remote;
int disconnect = 0;
CTR5(KTR_IW_CXGBE, "%s: so %p, ep %p, state %s, sbused %d", __func__,
ep->com.so, ep, states[ep->com.state], sbused(&ep->com.so->so_rcv));
switch (state_read(&ep->com)) {
case MPA_REQ_SENT:
disconnect = process_mpa_reply(ep);
break;
case MPA_REQ_WAIT:
in_getsockaddr(ep->com.so, (struct sockaddr **)&local);
in_getpeeraddr(ep->com.so, (struct sockaddr **)&remote);
ep->com.local_addr = *local;
ep->com.remote_addr = *remote;
free(local, M_SONAME);
free(remote, M_SONAME);
disconnect = process_mpa_request(ep);
break;
default:
if (sbused(&ep->com.so->so_rcv))
log(LOG_ERR, "%s: Unexpected streaming data. ep %p, "
"state %d, so %p, so_state 0x%x, sbused %u\n",
__func__, ep, state_read(&ep->com), ep->com.so,
ep->com.so->so_state, sbused(&ep->com.so->so_rcv));
break;
}
if (disconnect)
c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
}
static void
process_connected(struct c4iw_ep *ep)
{
if ((ep->com.so->so_state & SS_ISCONNECTED) && !ep->com.so->so_error) {
if (send_mpa_req(ep))
goto err;
}
else {
connect_reply_upcall(ep, -ep->com.so->so_error);
goto err;
}
return;
err:
close_socket(&ep->com, 0);
state_set(&ep->com, DEAD);
c4iw_put_ep(&ep->com);
return;
}
void
process_newconn(struct iw_cm_id *parent_cm_id, struct socket *child_so)
{
struct c4iw_ep *child_ep;
struct sockaddr_in *local;
struct sockaddr_in *remote;
struct c4iw_ep *parent_ep = parent_cm_id->provider_data;
int ret = 0;
if (!child_so) {
CTR4(KTR_IW_CXGBE,
"%s: parent so %p, parent ep %p, child so %p, invalid so",
__func__, parent_ep->com.so, parent_ep, child_so);
log(LOG_ERR, "%s: invalid child socket\n", __func__);
return;
}
child_ep = alloc_ep(sizeof(*child_ep), M_NOWAIT);
if (!child_ep) {
CTR3(KTR_IW_CXGBE, "%s: parent so %p, parent ep %p, ENOMEM",
__func__, parent_ep->com.so, parent_ep);
log(LOG_ERR, "%s: failed to allocate ep entry\n", __func__);
return;
}
SOCKBUF_LOCK(&child_so->so_rcv);
soupcall_set(child_so, SO_RCV, c4iw_so_upcall, child_ep);
SOCKBUF_UNLOCK(&child_so->so_rcv);
CTR5(KTR_IW_CXGBE,
"%s: parent so %p, parent ep %p, child so %p, child ep %p",
__func__, parent_ep->com.so, parent_ep, child_so, child_ep);
in_getsockaddr(child_so, (struct sockaddr **)&local);
in_getpeeraddr(child_so, (struct sockaddr **)&remote);
child_ep->com.local_addr = *local;
child_ep->com.remote_addr = *remote;
child_ep->com.dev = parent_ep->com.dev;
child_ep->com.so = child_so;
child_ep->com.cm_id = NULL;
child_ep->com.thread = parent_ep->com.thread;
child_ep->parent_ep = parent_ep;
free(local, M_SONAME);
free(remote, M_SONAME);
c4iw_get_ep(&parent_ep->com);
init_timer(&child_ep->timer);
state_set(&child_ep->com, MPA_REQ_WAIT);
START_EP_TIMER(child_ep);
/* maybe the request has already been queued up on the socket... */
ret = process_mpa_request(child_ep);
if (ret == 2)
/* ABORT */
c4iw_ep_disconnect(child_ep, 1, GFP_KERNEL);
else if (ret == 1)
/* CLOSE */
c4iw_ep_disconnect(child_ep, 0, GFP_KERNEL);
return;
}
static int
c4iw_so_upcall(struct socket *so, void *arg, int waitflag)
{
struct c4iw_ep *ep = arg;
spin_lock(&req_lock);
CTR6(KTR_IW_CXGBE,
"%s: so %p, so_state 0x%x, ep %p, ep_state %s, tqe_prev %p",
__func__, so, so->so_state, ep, states[ep->com.state],
ep->com.entry.tqe_prev);
if (ep && ep->com.so && !ep->com.entry.tqe_prev) {
KASSERT(ep->com.so == so, ("%s: XXX review.", __func__));
c4iw_get_ep(&ep->com);
TAILQ_INSERT_TAIL(&req_list, &ep->com, entry);
queue_work(c4iw_taskq, &c4iw_task);
}
spin_unlock(&req_lock);
return (SU_OK);
}
static void
process_socket_event(struct c4iw_ep *ep)
{
int state = state_read(&ep->com);
struct socket *so = ep->com.so;
CTR6(KTR_IW_CXGBE, "process_socket_event: so %p, so_state 0x%x, "
"so_err %d, sb_state 0x%x, ep %p, ep_state %s", so, so->so_state,
so->so_error, so->so_rcv.sb_state, ep, states[state]);
if (state == CONNECTING) {
process_connected(ep);
return;
}
if (state == LISTEN) {
/* socket listening events are handled at IWCM */
CTR3(KTR_IW_CXGBE, "%s Invalid ep state:%u, ep:%p", __func__,
ep->com.state, ep);
BUG();
return;
}
/* connection error */
if (so->so_error) {
process_conn_error(ep);
return;
}
/* peer close */
if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) && state <= CLOSING) {
process_peer_close(ep);
/*
* check whether socket disconnect event is pending before
* returning. Fallthrough if yes.
*/
if (!(so->so_state & SS_ISDISCONNECTED))
return;
}
/* close complete */
if (so->so_state & SS_ISDISCONNECTED) {
process_close_complete(ep);
return;
}
/* rx data */
process_data(ep);
}
SYSCTL_NODE(_hw, OID_AUTO, iw_cxgbe, CTLFLAG_RD, 0, "iw_cxgbe driver parameters");
static int dack_mode = 0;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, dack_mode, CTLFLAG_RWTUN, &dack_mode, 0,
"Delayed ack mode (default = 0)");
int c4iw_max_read_depth = 8;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, c4iw_max_read_depth, CTLFLAG_RWTUN, &c4iw_max_read_depth, 0,
"Per-connection max ORD/IRD (default = 8)");
static int enable_tcp_timestamps;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_timestamps, CTLFLAG_RWTUN, &enable_tcp_timestamps, 0,
"Enable tcp timestamps (default = 0)");
static int enable_tcp_sack;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_sack, CTLFLAG_RWTUN, &enable_tcp_sack, 0,
"Enable tcp SACK (default = 0)");
static int enable_tcp_window_scaling = 1;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_window_scaling, CTLFLAG_RWTUN, &enable_tcp_window_scaling, 0,
"Enable tcp window scaling (default = 1)");
int c4iw_debug = 1;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, c4iw_debug, CTLFLAG_RWTUN, &c4iw_debug, 0,
"Enable debug logging (default = 0)");
static int peer2peer = 1;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, peer2peer, CTLFLAG_RWTUN, &peer2peer, 0,
"Support peer2peer ULPs (default = 1)");
static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, p2p_type, CTLFLAG_RWTUN, &p2p_type, 0,
"RDMAP opcode to use for the RTR message: 1 = RDMA_READ 0 = RDMA_WRITE (default 1)");
static int ep_timeout_secs = 60;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, ep_timeout_secs, CTLFLAG_RWTUN, &ep_timeout_secs, 0,
"CM Endpoint operation timeout in seconds (default = 60)");
static int mpa_rev = 1;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, mpa_rev, CTLFLAG_RWTUN, &mpa_rev, 0,
"MPA Revision, 0 supports amso1100, 1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft compliant (default = 1)");
static int markers_enabled;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, markers_enabled, CTLFLAG_RWTUN, &markers_enabled, 0,
"Enable MPA MARKERS (default(0) = disabled)");
static int crc_enabled = 1;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, crc_enabled, CTLFLAG_RWTUN, &crc_enabled, 0,
"Enable MPA CRC (default(1) = enabled)");
static int rcv_win = 256 * 1024;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, rcv_win, CTLFLAG_RWTUN, &rcv_win, 0,
"TCP receive window in bytes (default = 256KB)");
static int snd_win = 128 * 1024;
SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, snd_win, CTLFLAG_RWTUN, &snd_win, 0,
"TCP send window in bytes (default = 128KB)");
static void
start_ep_timer(struct c4iw_ep *ep)
{
if (timer_pending(&ep->timer)) {
CTR2(KTR_IW_CXGBE, "%s: ep %p, already started", __func__, ep);
printk(KERN_ERR "%s timer already started! ep %p\n", __func__,
ep);
return;
}
clear_bit(TIMEOUT, &ep->com.flags);
c4iw_get_ep(&ep->com);
ep->timer.expires = jiffies + ep_timeout_secs * HZ;
ep->timer.data = (unsigned long)ep;
ep->timer.function = ep_timeout;
add_timer(&ep->timer);
}
static int
stop_ep_timer(struct c4iw_ep *ep)
{
del_timer_sync(&ep->timer);
if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
c4iw_put_ep(&ep->com);
return 0;
}
return 1;
}
static enum
c4iw_ep_state state_read(struct c4iw_ep_common *epc)
{
enum c4iw_ep_state state;
mutex_lock(&epc->mutex);
state = epc->state;
mutex_unlock(&epc->mutex);
return (state);
}
static void
__state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
{
epc->state = new;
}
static void
state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
{
mutex_lock(&epc->mutex);
__state_set(epc, new);
mutex_unlock(&epc->mutex);
}
static void *
alloc_ep(int size, gfp_t gfp)
{
struct c4iw_ep_common *epc;
epc = kzalloc(size, gfp);
if (epc == NULL)
return (NULL);
kref_init(&epc->kref);
mutex_init(&epc->mutex);
mutex_init(&epc->so_mutex);
c4iw_init_wr_wait(&epc->wr_wait);
return (epc);
}
void
__free_ep(struct c4iw_ep_common *epc)
{
CTR2(KTR_IW_CXGBE, "%s:feB %p", __func__, epc);
KASSERT(!epc->so, ("%s warning ep->so %p \n", __func__, epc->so));
KASSERT(!epc->entry.tqe_prev, ("%s epc %p still on req list!\n", __func__, epc));
free(epc, M_DEVBUF);
CTR2(KTR_IW_CXGBE, "%s:feE %p", __func__, epc);
}
void _c4iw_free_ep(struct kref *kref)
{
struct c4iw_ep *ep;
struct c4iw_ep_common *epc;
ep = container_of(kref, struct c4iw_ep, com.kref);
epc = &ep->com;
KASSERT(!epc->entry.tqe_prev, ("%s epc %p still on req list",
__func__, epc));
if (test_bit(QP_REFERENCED, &ep->com.flags))
deref_qp(ep);
kfree(ep);
}
static void release_ep_resources(struct c4iw_ep *ep)
{
CTR2(KTR_IW_CXGBE, "%s:rerB %p", __func__, ep);
set_bit(RELEASE_RESOURCES, &ep->com.flags);
c4iw_put_ep(&ep->com);
CTR2(KTR_IW_CXGBE, "%s:rerE %p", __func__, ep);
}
static int
send_mpa_req(struct c4iw_ep *ep)
{
int mpalen;
struct mpa_message *mpa;
struct mpa_v2_conn_params mpa_v2_params;
struct mbuf *m;
char mpa_rev_to_use = mpa_rev;
int err = 0;
if (ep->retry_with_mpa_v1)
mpa_rev_to_use = 1;
mpalen = sizeof(*mpa) + ep->plen;
if (mpa_rev_to_use == 2)
mpalen += sizeof(struct mpa_v2_conn_params);
mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
if (mpa == NULL) {
err = -ENOMEM;
CTR3(KTR_IW_CXGBE, "%s:smr1 ep: %p , error: %d",
__func__, ep, err);
goto err;
}
memset(mpa, 0, mpalen);
memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
mpa->flags = (crc_enabled ? MPA_CRC : 0) |
(markers_enabled ? MPA_MARKERS : 0) |
(mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
mpa->private_data_size = htons(ep->plen);
mpa->revision = mpa_rev_to_use;
if (mpa_rev_to_use == 1) {
ep->tried_with_mpa_v1 = 1;
ep->retry_with_mpa_v1 = 0;
}
if (mpa_rev_to_use == 2) {
mpa->private_data_size +=
htons(sizeof(struct mpa_v2_conn_params));
mpa_v2_params.ird = htons((u16)ep->ird);
mpa_v2_params.ord = htons((u16)ep->ord);
if (peer2peer) {
mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) {
mpa_v2_params.ord |=
htons(MPA_V2_RDMA_WRITE_RTR);
} else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) {
mpa_v2_params.ord |=
htons(MPA_V2_RDMA_READ_RTR);
}
}
memcpy(mpa->private_data, &mpa_v2_params,
sizeof(struct mpa_v2_conn_params));
if (ep->plen) {
memcpy(mpa->private_data +
sizeof(struct mpa_v2_conn_params),
ep->mpa_pkt + sizeof(*mpa), ep->plen);
}
} else {
if (ep->plen)
memcpy(mpa->private_data,
ep->mpa_pkt + sizeof(*mpa), ep->plen);
CTR2(KTR_IW_CXGBE, "%s:smr7 %p", __func__, ep);
}
m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
if (m == NULL) {
err = -ENOMEM;
CTR3(KTR_IW_CXGBE, "%s:smr2 ep: %p , error: %d",
__func__, ep, err);
free(mpa, M_CXGBE);
goto err;
}
m_copyback(m, 0, mpalen, (void *)mpa);
free(mpa, M_CXGBE);
err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT,
ep->com.thread);
if (err) {
CTR3(KTR_IW_CXGBE, "%s:smr3 ep: %p , error: %d",
__func__, ep, err);
goto err;
}
START_EP_TIMER(ep);
state_set(&ep->com, MPA_REQ_SENT);
ep->mpa_attr.initiator = 1;
CTR3(KTR_IW_CXGBE, "%s:smrE %p, error: %d", __func__, ep, err);
return 0;
err:
connect_reply_upcall(ep, err);
CTR3(KTR_IW_CXGBE, "%s:smrE %p, error: %d", __func__, ep, err);
return err;
}
static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
{
int mpalen ;
struct mpa_message *mpa;
struct mpa_v2_conn_params mpa_v2_params;
struct mbuf *m;
int err;
CTR4(KTR_IW_CXGBE, "%s:smrejB %p %u %d", __func__, ep, ep->hwtid,
ep->plen);
mpalen = sizeof(*mpa) + plen;
if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
mpalen += sizeof(struct mpa_v2_conn_params);
CTR4(KTR_IW_CXGBE, "%s:smrej1 %p %u %d", __func__, ep,
ep->mpa_attr.version, mpalen);
}
mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
if (mpa == NULL)
return (-ENOMEM);
memset(mpa, 0, mpalen);
memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
mpa->flags = MPA_REJECT;
mpa->revision = mpa_rev;
mpa->private_data_size = htons(plen);
if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
mpa->flags |= MPA_ENHANCED_RDMA_CONN;
mpa->private_data_size +=
htons(sizeof(struct mpa_v2_conn_params));
mpa_v2_params.ird = htons(((u16)ep->ird) |
(peer2peer ? MPA_V2_PEER2PEER_MODEL :
0));
mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
(p2p_type ==
FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
MPA_V2_RDMA_WRITE_RTR : p2p_type ==
FW_RI_INIT_P2PTYPE_READ_REQ ?
MPA_V2_RDMA_READ_RTR : 0) : 0));
memcpy(mpa->private_data, &mpa_v2_params,
sizeof(struct mpa_v2_conn_params));
if (ep->plen)
memcpy(mpa->private_data +
sizeof(struct mpa_v2_conn_params), pdata, plen);
CTR5(KTR_IW_CXGBE, "%s:smrej3 %p %d %d %d", __func__, ep,
mpa_v2_params.ird, mpa_v2_params.ord, ep->plen);
} else
if (plen)
memcpy(mpa->private_data, pdata, plen);
m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
if (m == NULL) {
free(mpa, M_CXGBE);
return (-ENOMEM);
}
m_copyback(m, 0, mpalen, (void *)mpa);
free(mpa, M_CXGBE);
err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT, ep->com.thread);
if (!err)
ep->snd_seq += mpalen;
CTR4(KTR_IW_CXGBE, "%s:smrejE %p %u %d", __func__, ep, ep->hwtid, err);
return err;
}
static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
{
int mpalen;
struct mpa_message *mpa;
struct mbuf *m;
struct mpa_v2_conn_params mpa_v2_params;
int err;
CTR2(KTR_IW_CXGBE, "%s:smrepB %p", __func__, ep);
mpalen = sizeof(*mpa) + plen;
if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
CTR3(KTR_IW_CXGBE, "%s:smrep1 %p %d", __func__, ep,
ep->mpa_attr.version);
mpalen += sizeof(struct mpa_v2_conn_params);
}
mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
if (mpa == NULL)
return (-ENOMEM);
memset(mpa, 0, sizeof(*mpa));
memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
(markers_enabled ? MPA_MARKERS : 0);
mpa->revision = ep->mpa_attr.version;
mpa->private_data_size = htons(plen);
if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
mpa->flags |= MPA_ENHANCED_RDMA_CONN;
mpa->private_data_size +=
htons(sizeof(struct mpa_v2_conn_params));
mpa_v2_params.ird = htons((u16)ep->ird);
mpa_v2_params.ord = htons((u16)ep->ord);
CTR5(KTR_IW_CXGBE, "%s:smrep3 %p %d %d %d", __func__, ep,
ep->mpa_attr.version, mpa_v2_params.ird, mpa_v2_params.ord);
if (peer2peer && (ep->mpa_attr.p2p_type !=
FW_RI_INIT_P2PTYPE_DISABLED)) {
mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) {
mpa_v2_params.ord |=
htons(MPA_V2_RDMA_WRITE_RTR);
CTR5(KTR_IW_CXGBE, "%s:smrep4 %p %d %d %d",
__func__, ep, p2p_type, mpa_v2_params.ird,
mpa_v2_params.ord);
}
else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) {
mpa_v2_params.ord |=
htons(MPA_V2_RDMA_READ_RTR);
CTR5(KTR_IW_CXGBE, "%s:smrep5 %p %d %d %d",
__func__, ep, p2p_type, mpa_v2_params.ird,
mpa_v2_params.ord);
}
}
memcpy(mpa->private_data, &mpa_v2_params,
sizeof(struct mpa_v2_conn_params));
if (ep->plen)
memcpy(mpa->private_data +
sizeof(struct mpa_v2_conn_params), pdata, plen);
} else
if (plen)
memcpy(mpa->private_data, pdata, plen);
m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
if (m == NULL) {
free(mpa, M_CXGBE);
return (-ENOMEM);
}
m_copyback(m, 0, mpalen, (void *)mpa);
free(mpa, M_CXGBE);
state_set(&ep->com, MPA_REP_SENT);
ep->snd_seq += mpalen;
err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT,
ep->com.thread);
CTR3(KTR_IW_CXGBE, "%s:smrepE %p %d", __func__, ep, err);
return err;
}
static void close_complete_upcall(struct c4iw_ep *ep, int status)
{
struct iw_cm_event event;
CTR2(KTR_IW_CXGBE, "%s:ccuB %p", __func__, ep);
memset(&event, 0, sizeof(event));
event.event = IW_CM_EVENT_CLOSE;
event.status = status;
if (ep->com.cm_id) {
CTR2(KTR_IW_CXGBE, "%s:ccu1 %1", __func__, ep);
ep->com.cm_id->event_handler(ep->com.cm_id, &event);
deref_cm_id(&ep->com);
set_bit(CLOSE_UPCALL, &ep->com.history);
}
CTR2(KTR_IW_CXGBE, "%s:ccuE %p", __func__, ep);
}
static int send_abort(struct c4iw_ep *ep)
{
int err;
CTR2(KTR_IW_CXGBE, "%s:abB %p", __func__, ep);
abort_socket(ep);
/*
* Since socket options were set as l_onoff=1 and l_linger=0 in in
* abort_socket, invoking soclose here sends a RST (reset) to the peer.
*/
err = close_socket(&ep->com, 1);
set_bit(ABORT_CONN, &ep->com.history);
CTR2(KTR_IW_CXGBE, "%s:abE %p", __func__, ep);
/*
* TBD: iw_cgbe driver should receive ABORT reply for every ABORT
* request it has sent. But the current TOE driver is not propagating
* this ABORT reply event (via do_abort_rpl) to iw_cxgbe. So as a work-
* around de-refer 'ep' (which was refered before sending ABORT request)
* here instead of doing it in abort_rpl() handler of iw_cxgbe driver.
*/
c4iw_put_ep(&ep->com);
return err;
}
static void peer_close_upcall(struct c4iw_ep *ep)
{
struct iw_cm_event event;
CTR2(KTR_IW_CXGBE, "%s:pcuB %p", __func__, ep);
memset(&event, 0, sizeof(event));
event.event = IW_CM_EVENT_DISCONNECT;
if (ep->com.cm_id) {
CTR2(KTR_IW_CXGBE, "%s:pcu1 %p", __func__, ep);
ep->com.cm_id->event_handler(ep->com.cm_id, &event);
set_bit(DISCONN_UPCALL, &ep->com.history);
}
CTR2(KTR_IW_CXGBE, "%s:pcuE %p", __func__, ep);
}
static void peer_abort_upcall(struct c4iw_ep *ep)
{
struct iw_cm_event event;
CTR2(KTR_IW_CXGBE, "%s:pauB %p", __func__, ep);
memset(&event, 0, sizeof(event));
event.event = IW_CM_EVENT_CLOSE;
event.status = -ECONNRESET;
if (ep->com.cm_id) {
CTR2(KTR_IW_CXGBE, "%s:pau1 %p", __func__, ep);
ep->com.cm_id->event_handler(ep->com.cm_id, &event);
deref_cm_id(&ep->com);
set_bit(ABORT_UPCALL, &ep->com.history);
}
CTR2(KTR_IW_CXGBE, "%s:pauE %p", __func__, ep);
}
static void connect_reply_upcall(struct c4iw_ep *ep, int status)
{
struct iw_cm_event event;
CTR3(KTR_IW_CXGBE, "%s:cruB %p, status: %d", __func__, ep, status);
memset(&event, 0, sizeof(event));
event.event = IW_CM_EVENT_CONNECT_REPLY;
event.status = ((status == -ECONNABORTED) || (status == -EPIPE)) ?
-ECONNRESET : status;
event.local_addr = ep->com.local_addr;
event.remote_addr = ep->com.remote_addr;
if ((status == 0) || (status == -ECONNREFUSED)) {
if (!ep->tried_with_mpa_v1) {
CTR2(KTR_IW_CXGBE, "%s:cru1 %p", __func__, ep);
/* this means MPA_v2 is used */
event.private_data_len = ep->plen -
sizeof(struct mpa_v2_conn_params);
event.private_data = ep->mpa_pkt +
sizeof(struct mpa_message) +
sizeof(struct mpa_v2_conn_params);
} else {
CTR2(KTR_IW_CXGBE, "%s:cru2 %p", __func__, ep);
/* this means MPA_v1 is used */
event.private_data_len = ep->plen;
event.private_data = ep->mpa_pkt +
sizeof(struct mpa_message);
}
}
if (ep->com.cm_id) {
CTR2(KTR_IW_CXGBE, "%s:cru3 %p", __func__, ep);
set_bit(CONN_RPL_UPCALL, &ep->com.history);
ep->com.cm_id->event_handler(ep->com.cm_id, &event);
}
if(status == -ECONNABORTED) {
CTR3(KTR_IW_CXGBE, "%s:cruE %p %d", __func__, ep, status);
return;
}
if (status < 0) {
CTR3(KTR_IW_CXGBE, "%s:cru4 %p %d", __func__, ep, status);
deref_cm_id(&ep->com);
}
CTR2(KTR_IW_CXGBE, "%s:cruE %p", __func__, ep);
}
static int connect_request_upcall(struct c4iw_ep *ep)
{
struct iw_cm_event event;
int ret;
CTR3(KTR_IW_CXGBE, "%s: ep %p, mpa_v1 %d", __func__, ep,
ep->tried_with_mpa_v1);
memset(&event, 0, sizeof(event));
event.event = IW_CM_EVENT_CONNECT_REQUEST;
event.local_addr = ep->com.local_addr;
event.remote_addr = ep->com.remote_addr;
event.provider_data = ep;
event.so = ep->com.so;
if (!ep->tried_with_mpa_v1) {
/* this means MPA_v2 is used */
event.ord = ep->ord;
event.ird = ep->ird;
event.private_data_len = ep->plen -
sizeof(struct mpa_v2_conn_params);
event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
sizeof(struct mpa_v2_conn_params);
} else {
/* this means MPA_v1 is used. Send max supported */
event.ord = c4iw_max_read_depth;
event.ird = c4iw_max_read_depth;
event.private_data_len = ep->plen;
event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
}
c4iw_get_ep(&ep->com);
ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
&event);
if(ret)
c4iw_put_ep(&ep->com);
set_bit(CONNREQ_UPCALL, &ep->com.history);
c4iw_put_ep(&ep->parent_ep->com);
return ret;
}
static void established_upcall(struct c4iw_ep *ep)
{
struct iw_cm_event event;
CTR2(KTR_IW_CXGBE, "%s:euB %p", __func__, ep);
memset(&event, 0, sizeof(event));
event.event = IW_CM_EVENT_ESTABLISHED;
event.ird = ep->ird;
event.ord = ep->ord;
if (ep->com.cm_id) {
CTR2(KTR_IW_CXGBE, "%s:eu1 %p", __func__, ep);
ep->com.cm_id->event_handler(ep->com.cm_id, &event);
set_bit(ESTAB_UPCALL, &ep->com.history);
}
CTR2(KTR_IW_CXGBE, "%s:euE %p", __func__, ep);
}
/*
* process_mpa_reply - process streaming mode MPA reply
*
* Returns:
*
* 0 upon success indicating a connect request was delivered to the ULP
* or the mpa request is incomplete but valid so far.
*
* 1 if a failure requires the caller to close the connection.
*
* 2 if a failure requires the caller to abort the connection.
*/
static int process_mpa_reply(struct c4iw_ep *ep)
{
struct mpa_message *mpa;
struct mpa_v2_conn_params *mpa_v2_params;
u16 plen;
u16 resp_ird, resp_ord;
u8 rtr_mismatch = 0, insuff_ird = 0;
struct c4iw_qp_attributes attrs;
enum c4iw_qp_attr_mask mask;
int err;
struct mbuf *top, *m;
int flags = MSG_DONTWAIT;
struct uio uio;
int disconnect = 0;
CTR2(KTR_IW_CXGBE, "%s:pmrB %p", __func__, ep);
/*
* Stop mpa timer. If it expired, then
* we ignore the MPA reply. process_timeout()
* will abort the connection.
*/
if (STOP_EP_TIMER(ep))
return 0;
uio.uio_resid = 1000000;
uio.uio_td = ep->com.thread;
err = soreceive(ep->com.so, NULL, &uio, &top, NULL, &flags);
if (err) {
if (err == EWOULDBLOCK) {
CTR2(KTR_IW_CXGBE, "%s:pmr1 %p", __func__, ep);
START_EP_TIMER(ep);
return 0;
}
err = -err;
CTR2(KTR_IW_CXGBE, "%s:pmr2 %p", __func__, ep);
goto err;
}
if (ep->com.so->so_rcv.sb_mb) {
CTR2(KTR_IW_CXGBE, "%s:pmr3 %p", __func__, ep);
printf("%s data after soreceive called! so %p sb_mb %p top %p\n",
__func__, ep->com.so, ep->com.so->so_rcv.sb_mb, top);
}
m = top;
do {
CTR2(KTR_IW_CXGBE, "%s:pmr4 %p", __func__, ep);
/*
* If we get more than the supported amount of private data
* then we must fail this connection.
*/
if (ep->mpa_pkt_len + m->m_len > sizeof(ep->mpa_pkt)) {
CTR3(KTR_IW_CXGBE, "%s:pmr5 %p %d", __func__, ep,
ep->mpa_pkt_len + m->m_len);
err = (-EINVAL);
goto err_stop_timer;
}
/*
* copy the new data into our accumulation buffer.
*/
m_copydata(m, 0, m->m_len, &(ep->mpa_pkt[ep->mpa_pkt_len]));
ep->mpa_pkt_len += m->m_len;
if (!m->m_next)
m = m->m_nextpkt;
else
m = m->m_next;
} while (m);
m_freem(top);
/*
* if we don't even have the mpa message, then bail.
*/
if (ep->mpa_pkt_len < sizeof(*mpa)) {
return 0;
}
mpa = (struct mpa_message *) ep->mpa_pkt;
/* Validate MPA header. */
if (mpa->revision > mpa_rev) {
CTR4(KTR_IW_CXGBE, "%s:pmr6 %p %d %d", __func__, ep,
mpa->revision, mpa_rev);
printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d, "
" Received = %d\n", __func__, mpa_rev, mpa->revision);
err = -EPROTO;
goto err_stop_timer;
}
if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
CTR2(KTR_IW_CXGBE, "%s:pmr7 %p", __func__, ep);
err = -EPROTO;
goto err_stop_timer;
}
plen = ntohs(mpa->private_data_size);
/*
* Fail if there's too much private data.
*/
if (plen > MPA_MAX_PRIVATE_DATA) {
CTR2(KTR_IW_CXGBE, "%s:pmr8 %p", __func__, ep);
err = -EPROTO;
goto err_stop_timer;
}
/*
* If plen does not account for pkt size
*/
if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
CTR2(KTR_IW_CXGBE, "%s:pmr9 %p", __func__, ep);
STOP_EP_TIMER(ep);
err = -EPROTO;
goto err_stop_timer;
}
ep->plen = (u8) plen;
/*
* If we don't have all the pdata yet, then bail.
* We'll continue process when more data arrives.
*/
if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) {
CTR2(KTR_IW_CXGBE, "%s:pmra %p", __func__, ep);
return 0;
}
if (mpa->flags & MPA_REJECT) {
CTR2(KTR_IW_CXGBE, "%s:pmrb %p", __func__, ep);
err = -ECONNREFUSED;
goto err_stop_timer;
}
/*
* If we get here we have accumulated the entire mpa
* start reply message including private data. And
* the MPA header is valid.
*/
state_set(&ep->com, FPDU_MODE);
ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
ep->mpa_attr.recv_marker_enabled = markers_enabled;
ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
ep->mpa_attr.version = mpa->revision;
ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
if (mpa->revision == 2) {
CTR2(KTR_IW_CXGBE, "%s:pmrc %p", __func__, ep);
ep->mpa_attr.enhanced_rdma_conn =
mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
if (ep->mpa_attr.enhanced_rdma_conn) {
CTR2(KTR_IW_CXGBE, "%s:pmrd %p", __func__, ep);
mpa_v2_params = (struct mpa_v2_conn_params *)
(ep->mpa_pkt + sizeof(*mpa));
resp_ird = ntohs(mpa_v2_params->ird) &
MPA_V2_IRD_ORD_MASK;
resp_ord = ntohs(mpa_v2_params->ord) &
MPA_V2_IRD_ORD_MASK;
/*
* This is a double-check. Ideally, below checks are
* not required since ird/ord stuff has been taken
* care of in c4iw_accept_cr
*/
if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) {
CTR2(KTR_IW_CXGBE, "%s:pmre %p", __func__, ep);
err = -ENOMEM;
ep->ird = resp_ord;
ep->ord = resp_ird;
insuff_ird = 1;
}
if (ntohs(mpa_v2_params->ird) &
MPA_V2_PEER2PEER_MODEL) {
CTR2(KTR_IW_CXGBE, "%s:pmrf %p", __func__, ep);
if (ntohs(mpa_v2_params->ord) &
MPA_V2_RDMA_WRITE_RTR) {
CTR2(KTR_IW_CXGBE, "%s:pmrg %p", __func__, ep);
ep->mpa_attr.p2p_type =
FW_RI_INIT_P2PTYPE_RDMA_WRITE;
}
else if (ntohs(mpa_v2_params->ord) &
MPA_V2_RDMA_READ_RTR) {
CTR2(KTR_IW_CXGBE, "%s:pmrh %p", __func__, ep);
ep->mpa_attr.p2p_type =
FW_RI_INIT_P2PTYPE_READ_REQ;
}
}
}
} else {
CTR2(KTR_IW_CXGBE, "%s:pmri %p", __func__, ep);
if (mpa->revision == 1) {
CTR2(KTR_IW_CXGBE, "%s:pmrj %p", __func__, ep);
if (peer2peer) {
CTR2(KTR_IW_CXGBE, "%s:pmrk %p", __func__, ep);
ep->mpa_attr.p2p_type = p2p_type;
}
}
}
if (set_tcpinfo(ep)) {
CTR2(KTR_IW_CXGBE, "%s:pmrl %p", __func__, ep);
printf("%s set_tcpinfo error\n", __func__);
err = -ECONNRESET;
goto err;
}
CTR6(KTR_IW_CXGBE, "%s - crc_enabled = %d, recv_marker_enabled = %d, "
"xmit_marker_enabled = %d, version = %d p2p_type = %d", __func__,
ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
ep->mpa_attr.p2p_type);
/*
* If responder's RTR does not match with that of initiator, assign
* FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
* generated when moving QP to RTS state.
* A TERM message will be sent after QP has moved to RTS state
*/
if ((ep->mpa_attr.version == 2) && peer2peer &&
(ep->mpa_attr.p2p_type != p2p_type)) {
CTR2(KTR_IW_CXGBE, "%s:pmrm %p", __func__, ep);
ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
rtr_mismatch = 1;
}
//ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq;
attrs.mpa_attr = ep->mpa_attr;
attrs.max_ird = ep->ird;
attrs.max_ord = ep->ord;
attrs.llp_stream_handle = ep;
attrs.next_state = C4IW_QP_STATE_RTS;
mask = C4IW_QP_ATTR_NEXT_STATE |
C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
/* bind QP and TID with INIT_WR */
err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1);
if (err) {
CTR2(KTR_IW_CXGBE, "%s:pmrn %p", __func__, ep);
goto err;
}
/*
* If responder's RTR requirement did not match with what initiator
* supports, generate TERM message
*/
if (rtr_mismatch) {
CTR2(KTR_IW_CXGBE, "%s:pmro %p", __func__, ep);
printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
attrs.layer_etype = LAYER_MPA | DDP_LLP;
attrs.ecode = MPA_NOMATCH_RTR;
attrs.next_state = C4IW_QP_STATE_TERMINATE;
err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
err = -ENOMEM;
disconnect = 1;
goto out;
}
/*
* Generate TERM if initiator IRD is not sufficient for responder
* provided ORD. Currently, we do the same behaviour even when
* responder provided IRD is also not sufficient as regards to
* initiator ORD.
*/
if (insuff_ird) {
CTR2(KTR_IW_CXGBE, "%s:pmrp %p", __func__, ep);
printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
__func__);
attrs.layer_etype = LAYER_MPA | DDP_LLP;
attrs.ecode = MPA_INSUFF_IRD;
attrs.next_state = C4IW_QP_STATE_TERMINATE;
err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
err = -ENOMEM;
disconnect = 1;
goto out;
}
goto out;
err_stop_timer:
STOP_EP_TIMER(ep);
err:
disconnect = 2;
out:
connect_reply_upcall(ep, err);
CTR2(KTR_IW_CXGBE, "%s:pmrE %p", __func__, ep);
return disconnect;
}
/*
* process_mpa_request - process streaming mode MPA request
*
* Returns:
*
* 0 upon success indicating a connect request was delivered to the ULP
* or the mpa request is incomplete but valid so far.
*
* 1 if a failure requires the caller to close the connection.
*
* 2 if a failure requires the caller to abort the connection.
*/
static int
process_mpa_request(struct c4iw_ep *ep)
{
struct mpa_message *mpa;
u16 plen;
int flags = MSG_DONTWAIT;
int rc;
struct iovec iov;
struct uio uio;
enum c4iw_ep_state state = state_read(&ep->com);
CTR3(KTR_IW_CXGBE, "%s: ep %p, state %s", __func__, ep, states[state]);
if (state != MPA_REQ_WAIT)
return 0;
iov.iov_base = &ep->mpa_pkt[ep->mpa_pkt_len];
iov.iov_len = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len;
uio.uio_iov = &iov;
uio.uio_iovcnt = 1;
uio.uio_offset = 0;
uio.uio_resid = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len;
uio.uio_segflg = UIO_SYSSPACE;
uio.uio_rw = UIO_READ;
uio.uio_td = NULL; /* uio.uio_td = ep->com.thread; */
rc = soreceive(ep->com.so, NULL, &uio, NULL, NULL, &flags);
if (rc == EAGAIN)
return 0;
else if (rc)
goto err_stop_timer;
KASSERT(uio.uio_offset > 0, ("%s: sorecieve on so %p read no data",
__func__, ep->com.so));
ep->mpa_pkt_len += uio.uio_offset;
/*
* If we get more than the supported amount of private data then we must
* fail this connection. XXX: check so_rcv->sb_cc, or peek with another
* soreceive, or increase the size of mpa_pkt by 1 and abort if the last
* byte is filled by the soreceive above.
*/
/* Don't even have the MPA message. Wait for more data to arrive. */
if (ep->mpa_pkt_len < sizeof(*mpa))
return 0;
mpa = (struct mpa_message *) ep->mpa_pkt;
/*
* Validate MPA Header.
*/
if (mpa->revision > mpa_rev) {
log(LOG_ERR, "%s: MPA version mismatch. Local = %d,"
" Received = %d\n", __func__, mpa_rev, mpa->revision);
goto err_stop_timer;
}
if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
goto err_stop_timer;
/*
* Fail if there's too much private data.
*/
plen = ntohs(mpa->private_data_size);
if (plen > MPA_MAX_PRIVATE_DATA)
goto err_stop_timer;
/*
* If plen does not account for pkt size
*/
if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
goto err_stop_timer;
ep->plen = (u8) plen;
/*
* If we don't have all the pdata yet, then bail.
*/
if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
return 0;
/*
* If we get here we have accumulated the entire mpa
* start reply message including private data.
*/
ep->mpa_attr.initiator = 0;
ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
ep->mpa_attr.recv_marker_enabled = markers_enabled;
ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
ep->mpa_attr.version = mpa->revision;
if (mpa->revision == 1)
ep->tried_with_mpa_v1 = 1;
ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
if (mpa->revision == 2) {
ep->mpa_attr.enhanced_rdma_conn =
mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
if (ep->mpa_attr.enhanced_rdma_conn) {
struct mpa_v2_conn_params *mpa_v2_params;
u16 ird, ord;
mpa_v2_params = (void *)&ep->mpa_pkt[sizeof(*mpa)];
ird = ntohs(mpa_v2_params->ird);
ord = ntohs(mpa_v2_params->ord);
ep->ird = ird & MPA_V2_IRD_ORD_MASK;
ep->ord = ord & MPA_V2_IRD_ORD_MASK;
if (ird & MPA_V2_PEER2PEER_MODEL && peer2peer) {
if (ord & MPA_V2_RDMA_WRITE_RTR) {
ep->mpa_attr.p2p_type =
FW_RI_INIT_P2PTYPE_RDMA_WRITE;
} else if (ord & MPA_V2_RDMA_READ_RTR) {
ep->mpa_attr.p2p_type =
FW_RI_INIT_P2PTYPE_READ_REQ;
}
}
}
} else if (mpa->revision == 1 && peer2peer)
ep->mpa_attr.p2p_type = p2p_type;
if (set_tcpinfo(ep))
goto err_stop_timer;
CTR5(KTR_IW_CXGBE, "%s: crc_enabled = %d, recv_marker_enabled = %d, "
"xmit_marker_enabled = %d, version = %d", __func__,
ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
state_set(&ep->com, MPA_REQ_RCVD);
STOP_EP_TIMER(ep);
/* drive upcall */
mutex_lock(&ep->parent_ep->com.mutex);
if (ep->parent_ep->com.state != DEAD) {
if (connect_request_upcall(ep))
goto err_unlock_parent;
} else
goto err_unlock_parent;
mutex_unlock(&ep->parent_ep->com.mutex);
return 0;
err_unlock_parent:
mutex_unlock(&ep->parent_ep->com.mutex);
goto err_out;
err_stop_timer:
STOP_EP_TIMER(ep);
err_out:
return 2;
}
/*
* Upcall from the adapter indicating data has been transmitted.
* For us its just the single MPA request or reply. We can now free
* the skb holding the mpa message.
*/
int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
{
int err;
struct c4iw_ep *ep = to_ep(cm_id);
CTR2(KTR_IW_CXGBE, "%s:crcB %p", __func__, ep);
int abort = 0;
if ((state_read(&ep->com) == DEAD) ||
(state_read(&ep->com) != MPA_REQ_RCVD)) {
CTR2(KTR_IW_CXGBE, "%s:crc1 %p", __func__, ep);
c4iw_put_ep(&ep->com);
return -ECONNRESET;
}
set_bit(ULP_REJECT, &ep->com.history);
if (mpa_rev == 0) {
CTR2(KTR_IW_CXGBE, "%s:crc2 %p", __func__, ep);
abort = 1;
}
else {
CTR2(KTR_IW_CXGBE, "%s:crc3 %p", __func__, ep);
abort = send_mpa_reject(ep, pdata, pdata_len);
}
stop_ep_timer(ep);
err = c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
c4iw_put_ep(&ep->com);
CTR3(KTR_IW_CXGBE, "%s:crc4 %p, err: %d", __func__, ep, err);
return 0;
}
int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
{
int err;
struct c4iw_qp_attributes attrs;
enum c4iw_qp_attr_mask mask;
struct c4iw_ep *ep = to_ep(cm_id);
struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
int abort = 0;
CTR2(KTR_IW_CXGBE, "%s:cacB %p", __func__, ep);
if (state_read(&ep->com) == DEAD) {
CTR2(KTR_IW_CXGBE, "%s:cac1 %p", __func__, ep);
err = -ECONNRESET;
goto err_out;
}
BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
BUG_ON(!qp);
set_bit(ULP_ACCEPT, &ep->com.history);
if ((conn_param->ord > c4iw_max_read_depth) ||
(conn_param->ird > c4iw_max_read_depth)) {
CTR2(KTR_IW_CXGBE, "%s:cac2 %p", __func__, ep);
err = -EINVAL;
goto err_abort;
}
if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
CTR2(KTR_IW_CXGBE, "%s:cac3 %p", __func__, ep);
if (conn_param->ord > ep->ird) {
CTR2(KTR_IW_CXGBE, "%s:cac4 %p", __func__, ep);
ep->ird = conn_param->ird;
ep->ord = conn_param->ord;
send_mpa_reject(ep, conn_param->private_data,
conn_param->private_data_len);
err = -ENOMEM;
goto err_abort;
}
if (conn_param->ird > ep->ord) {
CTR2(KTR_IW_CXGBE, "%s:cac5 %p", __func__, ep);
if (!ep->ord) {
CTR2(KTR_IW_CXGBE, "%s:cac6 %p", __func__, ep);
conn_param->ird = 1;
}
else {
CTR2(KTR_IW_CXGBE, "%s:cac7 %p", __func__, ep);
err = -ENOMEM;
goto err_abort;
}
}
}
ep->ird = conn_param->ird;
ep->ord = conn_param->ord;
if (ep->mpa_attr.version != 2) {
CTR2(KTR_IW_CXGBE, "%s:cac8 %p", __func__, ep);
if (peer2peer && ep->ird == 0) {
CTR2(KTR_IW_CXGBE, "%s:cac9 %p", __func__, ep);
ep->ird = 1;
}
}
ep->com.cm_id = cm_id;
ref_cm_id(&ep->com);
ep->com.qp = qp;
ref_qp(ep);
//ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq;
/* bind QP to EP and move to RTS */
attrs.mpa_attr = ep->mpa_attr;
attrs.max_ird = ep->ird;
attrs.max_ord = ep->ord;
attrs.llp_stream_handle = ep;
attrs.next_state = C4IW_QP_STATE_RTS;
/* bind QP and TID with INIT_WR */
mask = C4IW_QP_ATTR_NEXT_STATE |
C4IW_QP_ATTR_LLP_STREAM_HANDLE |
C4IW_QP_ATTR_MPA_ATTR |
C4IW_QP_ATTR_MAX_IRD |
C4IW_QP_ATTR_MAX_ORD;
err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1);
if (err) {
CTR2(KTR_IW_CXGBE, "%s:caca %p", __func__, ep);
goto err_defef_cm_id;
}
err = send_mpa_reply(ep, conn_param->private_data,
conn_param->private_data_len);
if (err) {
CTR2(KTR_IW_CXGBE, "%s:caca %p", __func__, ep);
goto err_defef_cm_id;
}
state_set(&ep->com, FPDU_MODE);
established_upcall(ep);
c4iw_put_ep(&ep->com);
CTR2(KTR_IW_CXGBE, "%s:cacE %p", __func__, ep);
return 0;
err_defef_cm_id:
deref_cm_id(&ep->com);
err_abort:
abort = 1;
err_out:
if (abort)
c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
c4iw_put_ep(&ep->com);
CTR2(KTR_IW_CXGBE, "%s:cacE err %p", __func__, ep);
return err;
}
int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
{
int err = 0;
struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
struct c4iw_ep *ep = NULL;
struct nhop4_extended nh4;
struct toedev *tdev;
CTR2(KTR_IW_CXGBE, "%s:ccB %p", __func__, cm_id);
if ((conn_param->ord > c4iw_max_read_depth) ||
(conn_param->ird > c4iw_max_read_depth)) {
CTR2(KTR_IW_CXGBE, "%s:cc1 %p", __func__, cm_id);
err = -EINVAL;
goto out;
}
ep = alloc_ep(sizeof(*ep), M_NOWAIT);
if (!ep) {
CTR2(KTR_IW_CXGBE, "%s:cc2 %p", __func__, cm_id);
printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
err = -ENOMEM;
goto out;
}
init_timer(&ep->timer);
ep->plen = conn_param->private_data_len;
if (ep->plen) {
CTR2(KTR_IW_CXGBE, "%s:cc3 %p", __func__, ep);
memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
conn_param->private_data, ep->plen);
}
ep->ird = conn_param->ird;
ep->ord = conn_param->ord;
if (peer2peer && ep->ord == 0) {
CTR2(KTR_IW_CXGBE, "%s:cc4 %p", __func__, ep);
ep->ord = 1;
}
ep->com.dev = dev;
ep->com.cm_id = cm_id;
ref_cm_id(&ep->com);
ep->com.qp = get_qhp(dev, conn_param->qpn);
if (!ep->com.qp) {
CTR2(KTR_IW_CXGBE, "%s:cc5 %p", __func__, ep);
err = -EINVAL;
goto fail2;
}
ref_qp(ep);
ep->com.thread = curthread;
ep->com.so = cm_id->so;
init_sock(&ep->com);
/* find a route */
err = find_route(
cm_id->local_addr.sin_addr.s_addr,
cm_id->remote_addr.sin_addr.s_addr,
cm_id->local_addr.sin_port,
cm_id->remote_addr.sin_port, 0, &nh4);
if (err) {
CTR2(KTR_IW_CXGBE, "%s:cc7 %p", __func__, ep);
printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
err = -EHOSTUNREACH;
goto fail2;
}
if (!(nh4.nh_ifp->if_capenable & IFCAP_TOE)) {
CTR2(KTR_IW_CXGBE, "%s:cc8 %p", __func__, ep);
printf("%s - interface not TOE capable.\n", __func__);
close_socket(&ep->com, 0);
err = -ENOPROTOOPT;
goto fail3;
}
tdev = TOEDEV(nh4.nh_ifp);
if (tdev == NULL) {
CTR2(KTR_IW_CXGBE, "%s:cc9 %p", __func__, ep);
printf("%s - No toedev for interface.\n", __func__);
goto fail3;
}
fib4_free_nh_ext(RT_DEFAULT_FIB, &nh4);
state_set(&ep->com, CONNECTING);
ep->tos = 0;
ep->com.local_addr = cm_id->local_addr;
ep->com.remote_addr = cm_id->remote_addr;
err = soconnect(ep->com.so, (struct sockaddr *)&ep->com.remote_addr,
ep->com.thread);
if (!err) {
CTR2(KTR_IW_CXGBE, "%s:cca %p", __func__, ep);
goto out;
} else {
close_socket(&ep->com, 0);
goto fail2;
}
fail3:
CTR2(KTR_IW_CXGBE, "%s:ccb %p", __func__, ep);
fib4_free_nh_ext(RT_DEFAULT_FIB, &nh4);
fail2:
deref_cm_id(&ep->com);
c4iw_put_ep(&ep->com);
out:
CTR2(KTR_IW_CXGBE, "%s:ccE %p", __func__, ep);
return err;
}
/*
* iwcm->create_listen_ep. Returns -errno on failure.
*/
int
c4iw_create_listen_ep(struct iw_cm_id *cm_id, int backlog)
{
int rc;
struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
struct c4iw_listen_ep *ep;
struct socket *so = cm_id->so;
ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
CTR5(KTR_IW_CXGBE, "%s: cm_id %p, lso %p, ep %p, inp %p", __func__,
cm_id, so, ep, so->so_pcb);
if (ep == NULL) {
log(LOG_ERR, "%s: failed to alloc memory for endpoint\n",
__func__);
rc = ENOMEM;
goto failed;
}
ep->com.cm_id = cm_id;
ref_cm_id(&ep->com);
ep->com.dev = dev;
ep->backlog = backlog;
ep->com.local_addr = cm_id->local_addr;
ep->com.thread = curthread;
state_set(&ep->com, LISTEN);
ep->com.so = so;
cm_id->provider_data = ep;
return (0);
failed:
CTR3(KTR_IW_CXGBE, "%s: cm_id %p, FAILED (%d)", __func__, cm_id, rc);
return (-rc);
}
void
c4iw_destroy_listen_ep(struct iw_cm_id *cm_id)
{
struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
CTR4(KTR_IW_CXGBE, "%s: cm_id %p, so %p, state %s", __func__, cm_id,
cm_id->so, states[ep->com.state]);
state_set(&ep->com, DEAD);
deref_cm_id(&ep->com);
c4iw_put_ep(&ep->com);
return;
}
int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
{
int ret = 0;
int close = 0;
int fatal = 0;
struct c4iw_rdev *rdev;
mutex_lock(&ep->com.mutex);
CTR2(KTR_IW_CXGBE, "%s:cedB %p", __func__, ep);
rdev = &ep->com.dev->rdev;
if (c4iw_fatal_error(rdev)) {
CTR2(KTR_IW_CXGBE, "%s:ced1 %p", __func__, ep);
fatal = 1;
close_complete_upcall(ep, -ECONNRESET);
ep->com.state = DEAD;
}
CTR3(KTR_IW_CXGBE, "%s:ced2 %p %s", __func__, ep,
states[ep->com.state]);
switch (ep->com.state) {
case MPA_REQ_WAIT:
case MPA_REQ_SENT:
case MPA_REQ_RCVD:
case MPA_REP_SENT:
case FPDU_MODE:
close = 1;
if (abrupt)
ep->com.state = ABORTING;
else {
ep->com.state = CLOSING;
START_EP_TIMER(ep);
}
set_bit(CLOSE_SENT, &ep->com.flags);
break;
case CLOSING:
if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
close = 1;
if (abrupt) {
STOP_EP_TIMER(ep);
ep->com.state = ABORTING;
} else
ep->com.state = MORIBUND;
}
break;
case MORIBUND:
case ABORTING:
case DEAD:
CTR3(KTR_IW_CXGBE,
"%s ignoring disconnect ep %p state %u", __func__,
ep, ep->com.state);
break;
default:
BUG();
break;
}
mutex_unlock(&ep->com.mutex);
if (close) {
CTR2(KTR_IW_CXGBE, "%s:ced3 %p", __func__, ep);
if (abrupt) {
CTR2(KTR_IW_CXGBE, "%s:ced4 %p", __func__, ep);
set_bit(EP_DISC_ABORT, &ep->com.history);
close_complete_upcall(ep, -ECONNRESET);
ret = send_abort(ep);
} else {
CTR2(KTR_IW_CXGBE, "%s:ced5 %p", __func__, ep);
set_bit(EP_DISC_CLOSE, &ep->com.history);
if (!ep->parent_ep)
__state_set(&ep->com, MORIBUND);
ret = shutdown_socket(&ep->com);
}
if (ret) {
fatal = 1;
}
}
if (fatal) {
set_bit(EP_DISC_FAIL, &ep->com.history);
if (!abrupt) {
STOP_EP_TIMER(ep);
close_complete_upcall(ep, -EIO);
}
if (ep->com.qp) {
struct c4iw_qp_attributes attrs;
attrs.next_state = C4IW_QP_STATE_ERROR;
ret = c4iw_modify_qp(ep->com.dev, ep->com.qp,
C4IW_QP_ATTR_NEXT_STATE,
&attrs, 1);
if (ret) {
CTR2(KTR_IW_CXGBE, "%s:ced7 %p", __func__, ep);
printf("%s - qp <- error failed!\n", __func__);
}
}
release_ep_resources(ep);
ep->com.state = DEAD;
CTR2(KTR_IW_CXGBE, "%s:ced6 %p", __func__, ep);
}
CTR2(KTR_IW_CXGBE, "%s:cedE %p", __func__, ep);
return ret;
}
#ifdef C4IW_EP_REDIRECT
int c4iw_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
struct l2t_entry *l2t)
{
struct c4iw_ep *ep = ctx;
if (ep->dst != old)
return 0;
PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new,
l2t);
dst_hold(new);
cxgb4_l2t_release(ep->l2t);
ep->l2t = l2t;
dst_release(old);
ep->dst = new;
return 1;
}
#endif
static void ep_timeout(unsigned long arg)
{
struct c4iw_ep *ep = (struct c4iw_ep *)arg;
int kickit = 0;
CTR2(KTR_IW_CXGBE, "%s:etB %p", __func__, ep);
spin_lock(&timeout_lock);
if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
/*
* Only insert if it is not already on the list.
*/
if (!ep->entry.next) {
list_add_tail(&ep->entry, &timeout_list);
kickit = 1;
}
}
spin_unlock(&timeout_lock);
if (kickit) {
CTR2(KTR_IW_CXGBE, "%s:et1 %p", __func__, ep);
queue_work(c4iw_taskq, &c4iw_task);
}
CTR2(KTR_IW_CXGBE, "%s:etE %p", __func__, ep);
}
static int fw6_wr_rpl(struct adapter *sc, const __be64 *rpl)
{
uint64_t val = be64toh(*rpl);
int ret;
struct c4iw_wr_wait *wr_waitp;
ret = (int)((val >> 8) & 0xff);
wr_waitp = (struct c4iw_wr_wait *)rpl[1];
CTR3(KTR_IW_CXGBE, "%s wr_waitp %p ret %u", __func__, wr_waitp, ret);
if (wr_waitp)
c4iw_wake_up(wr_waitp, ret ? -ret : 0);
return (0);
}
static int fw6_cqe_handler(struct adapter *sc, const __be64 *rpl)
{
struct t4_cqe cqe =*(const struct t4_cqe *)(&rpl[0]);
CTR2(KTR_IW_CXGBE, "%s rpl %p", __func__, rpl);
c4iw_ev_dispatch(sc->iwarp_softc, &cqe);
return (0);
}
static int terminate(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_rdma_terminate *cpl = mtod(m, const void *);
unsigned int tid = GET_TID(cpl);
struct c4iw_qp_attributes attrs;
struct toepcb *toep = lookup_tid(sc, tid);
struct socket *so;
struct c4iw_ep *ep;
INP_WLOCK(toep->inp);
so = inp_inpcbtosocket(toep->inp);
ep = so->so_rcv.sb_upcallarg;
INP_WUNLOCK(toep->inp);
CTR2(KTR_IW_CXGBE, "%s:tB %p %d", __func__, ep);
if (ep && ep->com.qp) {
printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
ep->com.qp->wq.sq.qid);
attrs.next_state = C4IW_QP_STATE_TERMINATE;
c4iw_modify_qp(ep->com.dev, ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, &attrs,
1);
} else
printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
CTR2(KTR_IW_CXGBE, "%s:tE %p %d", __func__, ep);
return 0;
}
int __init c4iw_cm_init(void)
{
t4_register_cpl_handler(CPL_RDMA_TERMINATE, terminate);
t4_register_fw_msg_handler(FW6_TYPE_WR_RPL, fw6_wr_rpl);
t4_register_fw_msg_handler(FW6_TYPE_CQE, fw6_cqe_handler);
t4_register_an_handler(c4iw_ev_handler);
TAILQ_INIT(&req_list);
spin_lock_init(&req_lock);
INIT_LIST_HEAD(&timeout_list);
spin_lock_init(&timeout_lock);
INIT_WORK(&c4iw_task, process_req);
c4iw_taskq = create_singlethread_workqueue("iw_cxgbe");
if (!c4iw_taskq)
return -ENOMEM;
return 0;
}
void __exit c4iw_cm_term(void)
{
WARN_ON(!TAILQ_EMPTY(&req_list));
WARN_ON(!list_empty(&timeout_list));
flush_workqueue(c4iw_taskq);
destroy_workqueue(c4iw_taskq);
t4_register_cpl_handler(CPL_RDMA_TERMINATE, NULL);
t4_register_fw_msg_handler(FW6_TYPE_WR_RPL, NULL);
t4_register_fw_msg_handler(FW6_TYPE_CQE, NULL);
t4_register_an_handler(NULL);
}
#endif
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