srpt_cm.c revision 1bdd6c0e3710e91cb1f31aa78de33cb638494480
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* IB CM handlers for s Solaris SCSI RDMA Protocol Target (SRP)
* transport port provider module for the COMSTAR framework.
*/
#include <sys/cpuvar.h>
#include <sys/types.h>
#include <sys/conf.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/modctl.h>
#include <sys/sysmacros.h>
#include <sys/sdt.h>
#include <sys/taskq.h>
#include <sys/ib/ibtl/ibti.h>
#include <stmf.h>
#include <stmf_ioctl.h>
#include <portif.h>
#include "srp.h"
#include "srpt_impl.h"
#include "srpt_cm.h"
#include "srpt_stp.h"
#include "srpt_ch.h"
extern uint16_t srpt_send_msg_depth;
extern srpt_ctxt_t *srpt_ctxt;
/*
* srpt_cm_req_hdlr() - Login request
*
* CM has called back with a CM REQ message associated with an
* SRP initiator login request.
*/
static ibt_cm_status_t
srpt_cm_req_hdlr(srpt_target_port_t *tgt, ibt_cm_event_t *event,
ibt_cm_return_args_t *ret_args, void *ret_priv_data,
ibt_priv_data_len_t ret_priv_data_len)
{
ibt_cm_status_t status;
ibt_cm_req_rcv_t *req;
srp_login_req_t login;
srp_login_rej_t login_rej;
srp_login_rsp_t login_rsp;
srpt_channel_t *ch = NULL;
ASSERT(tgt != NULL);
req = &event->cm_event.req;
if (event->cm_priv_data_len < sizeof (srp_login_req_t)) {
SRPT_DPRINTF_L2("cm_req_hdlr, IU size expected (>= %d),"
" received size (%d)", (uint_t)sizeof (srp_login_req_t),
event->cm_priv_data_len);
return (IBT_CM_REJECT);
}
if (event->cm_priv_data == NULL) {
SRPT_DPRINTF_L2("cm_req_hdlr, NULL ULP private data pointer");
return (IBT_CM_REJECT);
}
if (ret_priv_data_len < sizeof (srp_login_rej_t)) {
SRPT_DPRINTF_L2("cm_req_hdlr, return private len too"
" small (%d)", ret_priv_data_len);
return (IBT_CM_REJECT);
}
if (ret_priv_data == NULL) {
SRPT_DPRINTF_L2("cm_req_hdlr, NULL ULP return private data"
" pointer");
return (IBT_CM_REJECT);
}
/*
* Copy to avoid potential alignment problems, process login
* creating a new channel and possibly session.
*/
bcopy(event->cm_priv_data, &login, sizeof (login));
ch = srpt_stp_login(tgt, &login, &login_rsp,
&login_rej, req->req_prim_hca_port);
if (ch != NULL) {
bcopy(&login_rsp, ret_priv_data, SRP_LOGIN_RSP_SIZE);
ret_args->cm_ret_len = SRP_LOGIN_RSP_SIZE;
SRPT_DPRINTF_L3("cm_req_hdlr, rsp priv len(%d)"
" ch created on port(%d)"
", cm_req_hdlr, req ra_out(%d), ra_in(%d)"
", retry(%d)",
ret_args->cm_ret_len, req->req_prim_hca_port,
req->req_rdma_ra_out, req->req_rdma_ra_in,
req->req_retry_cnt);
ret_args->cm_ret.rep.cm_channel = ch->ch_chan_hdl;
ret_args->cm_ret.rep.cm_rdma_ra_out =
min(tgt->tp_ioc->ioc_attr.hca_max_rdma_out_chan,
req->req_rdma_ra_in);
ret_args->cm_ret.rep.cm_rdma_ra_in =
min(tgt->tp_ioc->ioc_attr.hca_max_rdma_in_chan,
req->req_rdma_ra_out);
ret_args->cm_ret.rep.cm_rnr_retry_cnt = req->req_retry_cnt;
SRPT_DPRINTF_L3("cm_req_hdlr, hca_max_rdma_in_chan (%d)"
", hca_max_rdma_out_chan (%d)"
", updated ra_out(%d), ra_in(%d), retry(%d)",
tgt->tp_ioc->ioc_attr.hca_max_rdma_in_chan,
tgt->tp_ioc->ioc_attr.hca_max_rdma_out_chan,
ret_args->cm_ret.rep.cm_rdma_ra_out,
ret_args->cm_ret.rep.cm_rdma_ra_in,
ret_args->cm_ret.rep.cm_rnr_retry_cnt);
status = IBT_CM_ACCEPT;
} else {
bcopy(&login_rej, ret_priv_data, sizeof (login_rej));
ret_args->cm_ret_len = sizeof (login_rej);
status = IBT_CM_REJECT;
}
return (status);
}
/*
* srpt_cm_conn_est_hdlr() - Connection established
*
* CM has called back to inform us that a connection attempt has
* completed (explicit or implicit) and may now be used.
*/
/* ARGSUSED */
static ibt_cm_status_t
srpt_cm_conn_est_hdlr(srpt_target_port_t *tgt, ibt_cm_event_t *event)
{
srpt_channel_t *ch;
ASSERT(tgt != NULL);
ASSERT(event != NULL);
ch = (srpt_channel_t *)ibt_get_chan_private(event->cm_channel);
ASSERT(ch != NULL);
SRPT_DPRINTF_L3("cm_conn_est_hdlr, invoked for ch(%p)",
(void *)ch);
rw_enter(&ch->ch_rwlock, RW_WRITER);
if (ch->ch_state != SRPT_CHANNEL_CONNECTING &&
ch->ch_state != SRPT_CHANNEL_CONNECTED) {
SRPT_DPRINTF_L2("cm_conn_est_hdlr, invalid ch state (%d)",
ch->ch_state);
rw_exit(&ch->ch_rwlock);
return (IBT_CM_REJECT);
}
ch->ch_state = SRPT_CHANNEL_CONNECTED;
rw_exit(&ch->ch_rwlock);
return (IBT_CM_ACCEPT);
}
/*
* srpt_cm_conn_closed_hdlr() - Channel closed
*
* CM callback indicating a channel has been completely closed.
*/
/* ARGSUSED */
static ibt_cm_status_t
srpt_cm_conn_closed_hdlr(srpt_target_port_t *tgt, ibt_cm_event_t *event)
{
ibt_cm_status_t status = IBT_CM_ACCEPT;
srpt_channel_t *ch;
ASSERT(tgt != NULL);
ASSERT(event != NULL);
ch = (srpt_channel_t *)ibt_get_chan_private(event->cm_channel);
ASSERT(ch != NULL);
SRPT_DPRINTF_L3("cm_conn_closed_hdlr, invoked for chan_hdl(%p),"
" event(%d)", (void *)ch->ch_chan_hdl,
event->cm_event.closed);
switch (event->cm_event.closed) {
case IBT_CM_CLOSED_DREP_RCVD:
case IBT_CM_CLOSED_DREQ_TIMEOUT:
case IBT_CM_CLOSED_DUP:
case IBT_CM_CLOSED_ABORT:
case IBT_CM_CLOSED_ALREADY:
/*
* These cases indicate the SRP target initiated
* the closing of the channel and it is now closed.
* Cleanup the channel (which will remove the targets
* reference) and then release CM's reference.
*/
SRPT_DPRINTF_L3("cm_conn_closed_hdlr, local close call-back");
srpt_ch_cleanup(ch);
srpt_ch_release_ref(ch, 1);
break;
case IBT_CM_CLOSED_DREQ_RCVD:
case IBT_CM_CLOSED_REJ_RCVD:
case IBT_CM_CLOSED_STALE:
/*
* These cases indicate that the SRP initiator is closing
* the channel. CM will have already closed the RC channel,
* so simply initiate cleanup which will remove the target
* ports reference to the channel and then release the
* reference held by the CM.
*/
SRPT_DPRINTF_L3("cm_conn_closed_hdlr, remote close,"
" free channel");
if (ch != NULL) {
srpt_ch_cleanup(ch);
srpt_ch_release_ref(ch, 1);
} else {
SRPT_DPRINTF_L2("cm_conn_closed_hdlr, NULL channel");
}
break;
default:
SRPT_DPRINTF_L2("cm_conn_closed_hdlr, unknown close type (%d)",
event->cm_event.closed);
status = IBT_CM_DEFAULT;
break;
}
return (status);
}
/*
* srpt_cm_failure_hdlr() - Called when the channel is in error. Cleanup
* and release the channel.
*/
static ibt_cm_status_t
srpt_cm_failure_hdlr(ibt_cm_event_t *event)
{
srpt_channel_t *ch;
ASSERT(event != NULL);
ch = (srpt_channel_t *)ibt_get_chan_private(event->cm_channel);
ASSERT(ch != NULL);
SRPT_DPRINTF_L3("cm_failure_hdlr, chan_hdl: 0x%p, code: %d"
"msg: %d reason: %d", (void *)event->cm_channel,
event->cm_event.failed.cf_code,
event->cm_event.failed.cf_msg,
event->cm_event.failed.cf_reason);
srpt_ch_cleanup(ch);
srpt_ch_release_ref(ch, 1);
return (IBT_CM_ACCEPT);
}
/*
* srpt_cm_hdlr() - CM call-back handler.
*/
ibt_cm_status_t
srpt_cm_hdlr(void *cm_private, ibt_cm_event_t *event,
ibt_cm_return_args_t *ret_args, void *ret_priv_data,
ibt_priv_data_len_t ret_len_max)
{
ibt_cm_status_t status = IBT_CM_ACCEPT;
switch (event->cm_type) {
case IBT_CM_EVENT_REQ_RCV:
SRPT_DPRINTF_L3("cm_hdlr, REQ received");
status = srpt_cm_req_hdlr((srpt_target_port_t *)cm_private,
event, ret_args, ret_priv_data, ret_len_max);
break;
case IBT_CM_EVENT_REP_RCV:
SRPT_DPRINTF_L3("cm_hdlr, REP received");
break;
case IBT_CM_EVENT_MRA_RCV:
SRPT_DPRINTF_L3("cm_hdlr, MRA received");
break;
case IBT_CM_EVENT_CONN_EST:
SRPT_DPRINTF_L3("cm_hdlr, Connection established");
status = srpt_cm_conn_est_hdlr(
(srpt_target_port_t *)cm_private, event);
break;
case IBT_CM_EVENT_CONN_CLOSED:
SRPT_DPRINTF_L3("cm_hdlr, Connection closed");
status = srpt_cm_conn_closed_hdlr(
(srpt_target_port_t *)cm_private, event);
break;
case IBT_CM_EVENT_FAILURE:
SRPT_DPRINTF_L3("cm_hdlr, Event failure");
status = srpt_cm_failure_hdlr(event);
break;
case IBT_CM_EVENT_LAP_RCV:
SRPT_DPRINTF_L3("cm_hdlr, LAP received");
break;
case IBT_CM_EVENT_APR_RCV:
SRPT_DPRINTF_L3("cm_hdlr, APR received");
break;
default:
SRPT_DPRINTF_L3("cm_hdlr, unknown event received");
break;
}
return (status);
}