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Commit 9171bfdd authored by Mike Marciniszyn's avatar Mike Marciniszyn Committed by Doug Ledford
Browse files

staging/rdma/hfi1: centralize timer routines into rc 



Centralize disparate timer maintenance.

This allow for central control and changes to the RC
timer handling including future optimizations.

Reviewed-by: default avatarJubin John <jubin.john@intel.com>
Signed-off-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent cd93a9e8

drivers/staging/rdma/hfi1/rc.c

+107 −0
Original line number Diff line number Diff line
@@ -62,6 +62,113 @@ 


static void rc_timeout(unsigned long arg);



/**

 * hfi1_add_retry_timer - add/start a retry timer

 * @qp - the QP

 *

 * add a retry timer on the QP

 */

static inline void hfi1_add_retry_timer(struct rvt_qp *qp)

{

	qp->s_flags |= RVT_S_TIMER;

	qp->s_timer.function = rc_timeout;

	/* 4.096 usec. * (1 << qp->timeout) */

	qp->s_timer.expires = jiffies + qp->timeout_jiffies;

	add_timer(&qp->s_timer);

}



/**

 * hfi1_add_rnr_timer - add/start an rnr timer

 * @qp - the QP

 * @to - timeout in usecs

 *

 * add an rnr timer on the QP

 */

static inline void hfi1_add_rnr_timer(struct rvt_qp *qp, u32 to)

{

	qp->s_flags |= RVT_S_WAIT_RNR;

	qp->s_timer.function = hfi1_rc_rnr_retry;

	qp->s_timer.expires = jiffies + usecs_to_jiffies(to);

	add_timer(&qp->s_timer);

}



/**

 * hfi1_mod_retry_timer - mod a retry timer

 * @qp - the QP

 *

 * Modify a potentially already running retry

 * timer

 */

static inline void hfi1_mod_retry_timer(struct rvt_qp *qp)

{

	qp->s_flags |= RVT_S_TIMER;

	qp->s_timer.function = rc_timeout;

	/* 4.096 usec. * (1 << qp->timeout) */

	mod_timer(&qp->s_timer, jiffies + qp->timeout_jiffies);

}



/**

 * hfi1_stop_retry_timer - stop a retry timer

 * @qp - the QP

 *

 * stop a retry timer and return if the timer

 * had been pending.

 */

static inline int hfi1_stop_retry_timer(struct rvt_qp *qp)

{

	int rval = 0;



	/* Remove QP from retry */

	if (qp->s_flags & RVT_S_TIMER) {

		qp->s_flags &= ~RVT_S_TIMER;

		rval = del_timer(&qp->s_timer);

	}

	return rval;

}



/**

 * hfi1_stop_rc_timers - stop all timers

 * @qp - the QP

 *

 * stop any pending timers

 */

static inline void hfi1_stop_rc_timers(struct rvt_qp *qp)

{

	/* Remove QP from all timers */

	if (qp->s_flags & (RVT_S_TIMER | RVT_S_WAIT_RNR)) {

		qp->s_flags &= ~(RVT_S_TIMER | RVT_S_WAIT_RNR);

		del_timer(&qp->s_timer);

	}

}



/**

 * hfi1_stop_rnr_timer - stop an rnr timer

 * @qp - the QP

 *

 * stop an rnr timer and return if the timer

 * had been pending.

 */

static inline int hfi1_stop_rnr_timer(struct rvt_qp *qp)

{

	int rval = 0;



	/* Remove QP from rnr timer */

	if (qp->s_flags & RVT_S_WAIT_RNR) {

		qp->s_flags &= ~RVT_S_WAIT_RNR;

		rval = del_timer(&qp->s_timer);

	}

	return rval;

}



/**

 * hfi1_del_timers_sync - wait for any timeout routines to exit

 * @qp - the QP

 */

static inline void hfi1_del_timers_sync(struct rvt_qp *qp)

{

	del_timer_sync(&qp->s_timer);

}



static u32 restart_sge(struct rvt_sge_state *ss, struct rvt_swqe *wqe,

		       u32 psn, u32 pmtu)

{