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      1 /*	$NetBSD: ieee8023ad_lacp_sm_ptx.c,v 1.4 2021/11/30 01:17:02 yamaguchi Exp $	*/
      2 
      3 /*-
      4  * Copyright (c)2005 YAMAMOTO Takashi,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: ieee8023ad_lacp_sm_ptx.c,v 1.4 2021/11/30 01:17:02 yamaguchi Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/callout.h>
     34 #include <sys/mbuf.h>
     35 #include <sys/systm.h>
     36 
     37 #include <net/if.h>
     38 #include <net/if_ether.h>
     39 #include <net/ether_slowprotocols.h>
     40 
     41 #include <net/agr/ieee8023_tlv.h>
     42 #include <net/agr/ieee8023ad_lacp.h>
     43 #include <net/agr/ieee8023ad_lacp_impl.h>
     44 #include <net/agr/ieee8023ad_lacp_sm.h>
     45 #include <net/agr/ieee8023ad_lacp_debug.h>
     46 
     47 /* periodic transmit machine */
     48 
     49 void
     50 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate)
     51 {
     52 
     53 	if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
     54 	    LACP_STATE_TIMEOUT)) {
     55 		return;
     56 	}
     57 
     58 	LACP_DPRINTF((lp, "partner timeout changed\n"));
     59 
     60 	/*
     61 	 * FAST_PERIODIC -> SLOW_PERIODIC
     62 	 * or
     63 	 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
     64 	 *
     65 	 * let lacp_sm_ptx_tx_schedule to update timeout.
     66 	 */
     67 
     68 	LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
     69 
     70 	/*
     71 	 * if timeout has been shortened, assert NTT.
     72 	 */
     73 
     74 	if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) {
     75 		lacp_sm_assert_ntt(lp);
     76 	}
     77 }
     78 
     79 void
     80 lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
     81 {
     82 	int timeout;
     83 
     84 	if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
     85 	    !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
     86 
     87 		/*
     88 		 * NO_PERIODIC
     89 		 */
     90 
     91 		LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
     92 		return;
     93 	}
     94 
     95 	if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) {
     96 		return;
     97 	}
     98 
     99 	timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
    100 	    LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
    101 
    102 	LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
    103 }
    104 
    105 void
    106 lacp_sm_ptx_timer(struct lacp_port *lp)
    107 {
    108 
    109 	lacp_sm_assert_ntt(lp);
    110 }
    111