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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* ISSUES
*/
#include <sys/scsi/scsi.h>
#include <sys/note.h>
#include <sys/scsi/adapters/fasreg.h>
#include <sys/scsi/adapters/fasvar.h>
#include <sys/scsi/adapters/fascmd.h>
#include <sys/vtrace.h>
#ifdef FASDEBUG
extern int fasdebug;
extern int fasdebug_instance; /* debug all instances */
#endif /* FASDEBUG */
void fas_complete_arq_pkt(struct scsi_pkt *pkt);
void fas_call_pkt_comp(register struct fas *fas,
register struct fas_cmd *sp);
void fas_empty_callbackQ(struct fas *fas);
int fas_init_callbacks(struct fas *fas);
void fas_destroy_callbacks(struct fas *fas);
void fas_printf(struct fas *fas, const char *fmt, ...);
int
fas_init_callbacks(struct fas *fas)
{
mutex_init(&fas->f_c_mutex, NULL, MUTEX_DRIVER, fas->f_iblock);
return (0);
}
void
fas_destroy_callbacks(struct fas *fas)
{
mutex_destroy(&fas->f_c_mutex);
}
void
fas_empty_callbackQ(struct fas *fas)
{
register struct fas_cmd *sp;
TRACE_0(TR_FAC_SCSI, TR_FAS_EMPTY_CALLBACKQ_START,
"fas_empty_callbackQ_start");
mutex_enter(&fas->f_c_mutex);
/*
* don't recurse into calling back: the target driver
* may call scsi_transport() again which may call
* fas_empty_callbackQ again
*/
if (fas->f_c_in_callback) {
goto done;
}
fas->f_c_in_callback = 1;
while (fas->f_c_qf) {
register struct fas_cmd *qf = fas->f_c_qf;
fas->f_c_qf = fas->f_c_qb = NULL;
mutex_exit(&fas->f_c_mutex);
while (qf) {
sp = qf;
qf = sp->cmd_forw;
(*sp->cmd_pkt->pkt_comp)(sp->cmd_pkt);
}
mutex_enter(&fas->f_c_mutex);
}
fas->f_c_in_callback = 0;
done:
mutex_exit(&fas->f_c_mutex);
TRACE_0(TR_FAC_SCSI, TR_FAS_EMPTY_CALLBACKQ_END,
"fas_empty_callbackQ_end");
}
/*
* fas_call_pkt_comp does sanity checking to ensure that we don't
* call completion twice on the same packet or a packet that has been freed.
* if there is a completion function specified, the packet is queued
* up and it is left to the fas_callback thread to empty the queue at
* a lower priority; note that there is one callback queue per fas
*
* we use a separate thread for calling back into the target driver
* this thread unqueues packets from the callback queue
*/
void
fas_call_pkt_comp(register struct fas *fas, register struct fas_cmd *sp)
{
TRACE_0(TR_FAC_SCSI, TR_FAS_CALL_PKT_COMP_START,
"fas_call_pkt_comp_start");
ASSERT(sp != 0);
ASSERT((sp->cmd_flags & CFLAG_COMPLETED) == 0);
ASSERT((sp->cmd_flags & CFLAG_FREE) == 0);
ASSERT(sp->cmd_flags & CFLAG_FINISHED);
ASSERT(fas->f_ncmds >= fas->f_ndisc);
ASSERT((sp->cmd_flags & CFLAG_CMDDISC) == 0);
ASSERT(sp != fas->f_current_sp);
ASSERT(sp != fas->f_active[sp->cmd_slot]->f_slot[sp->cmd_tag[1]]);
sp->cmd_flags &= ~CFLAG_IN_TRANSPORT;
sp->cmd_flags |= CFLAG_COMPLETED;
sp->cmd_qfull_retries = 0;
/*
* if this was an auto request sense, complete immediately to free
* the arq pkt
*/
if (sp->cmd_pkt->pkt_comp && !(sp->cmd_flags & CFLAG_CMDARQ)) {
if (sp->cmd_pkt->pkt_reason != CMD_CMPLT) {
IPRINTF6("completion for %d.%d, sp=0x%p, "
"reason=%s, stats=%x, state=%x\n",
Tgt(sp), Lun(sp), (void *)sp,
scsi_rname(sp->cmd_pkt->pkt_reason),
sp->cmd_pkt->pkt_statistics,
sp->cmd_pkt->pkt_state);
} else {
EPRINTF2("completion queued for %d.%dn",
Tgt(sp), Lun(sp));
}
/*
* append the packet or start a new queue
*/
mutex_enter(&fas->f_c_mutex);
if (fas->f_c_qf) {
/*
* add to tail
*/
register struct fas_cmd *dp = fas->f_c_qb;
ASSERT(dp != NULL);
fas->f_c_qb = sp;
sp->cmd_forw = NULL;
dp->cmd_forw = sp;
} else {
/*
* start new queue
*/
fas->f_c_qf = fas->f_c_qb = sp;
sp->cmd_forw = NULL;
}
mutex_exit(&fas->f_c_mutex);
} else if ((sp->cmd_flags & CFLAG_CMDARQ) && sp->cmd_pkt->pkt_comp) {
/*
* pkt_comp may be NULL when we are aborting/resetting but then
* the callback will be redone later
*/
fas_complete_arq_pkt(sp->cmd_pkt);
} else {
EPRINTF2("No completion routine for 0x%p reason %x\n",
(void *)sp, sp->cmd_pkt->pkt_reason);
}
TRACE_0(TR_FAC_SCSI, TR_FAS_CALL_PKT_COMP_END,
"fas_call_pkt_comp_end");
}
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