From 7725ccfda59715ecf8f99e3b520a0b84cc2ea79e Mon Sep 17 00:00:00 2001 From: Jing Huang Date: Wed, 23 Sep 2009 17:46:15 -0700 Subject: [SCSI] bfa: Brocade BFA FC SCSI driver Add new driver for Brocade Hardware Signed-off-by: Jing Huang Signed-off-by: James Bottomley --- drivers/scsi/bfa/bfa_timer.c | 90 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+) create mode 100644 drivers/scsi/bfa/bfa_timer.c (limited to 'drivers/scsi/bfa/bfa_timer.c') diff --git a/drivers/scsi/bfa/bfa_timer.c b/drivers/scsi/bfa/bfa_timer.c new file mode 100644 index 000000000000..cb76481f5cb1 --- /dev/null +++ b/drivers/scsi/bfa/bfa_timer.c @@ -0,0 +1,90 @@ +/* + * Copyright (c) 2005-2009 Brocade Communications Systems, Inc. + * All rights reserved + * www.brocade.com + * + * Linux driver for Brocade Fibre Channel Host Bus Adapter. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License (GPL) Version 2 as + * published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include +#include + +void +bfa_timer_init(struct bfa_timer_mod_s *mod) +{ + INIT_LIST_HEAD(&mod->timer_q); +} + +void +bfa_timer_beat(struct bfa_timer_mod_s *mod) +{ + struct list_head *qh = &mod->timer_q; + struct list_head *qe, *qe_next; + struct bfa_timer_s *elem; + struct list_head timedout_q; + + INIT_LIST_HEAD(&timedout_q); + + qe = bfa_q_next(qh); + + while (qe != qh) { + qe_next = bfa_q_next(qe); + + elem = (struct bfa_timer_s *) qe; + if (elem->timeout <= BFA_TIMER_FREQ) { + elem->timeout = 0; + list_del(&elem->qe); + list_add_tail(&elem->qe, &timedout_q); + } else { + elem->timeout -= BFA_TIMER_FREQ; + } + + qe = qe_next; /* go to next elem */ + } + + /* + * Pop all the timeout entries + */ + while (!list_empty(&timedout_q)) { + bfa_q_deq(&timedout_q, &elem); + elem->timercb(elem->arg); + } +} + +/** + * Should be called with lock protection + */ +void +bfa_timer_begin(struct bfa_timer_mod_s *mod, struct bfa_timer_s *timer, + void (*timercb) (void *), void *arg, unsigned int timeout) +{ + + bfa_assert(timercb != NULL); + bfa_assert(!bfa_q_is_on_q(&mod->timer_q, timer)); + + timer->timeout = timeout; + timer->timercb = timercb; + timer->arg = arg; + + list_add_tail(&timer->qe, &mod->timer_q); +} + +/** + * Should be called with lock protection + */ +void +bfa_timer_stop(struct bfa_timer_s *timer) +{ + bfa_assert(!list_empty(&timer->qe)); + + list_del(&timer->qe); +} -- cgit v1.2.3