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/*
* Intel MIC Platform Software Stack (MPSS)
*
* Copyright(c) 2014 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, 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.
*
* Intel SCIF driver.
*
*/
#include "scif_main.h"
#include "scif_map.h"
void scif_cleanup_ep_qp(struct scif_endpt *ep)
{
struct scif_qp *qp = ep->qp_info.qp;
if (qp->outbound_q.rb_base) {
scif_iounmap((void *)qp->outbound_q.rb_base,
qp->outbound_q.size, ep->remote_dev);
qp->outbound_q.rb_base = NULL;
}
if (qp->remote_qp) {
scif_iounmap((void *)qp->remote_qp,
sizeof(struct scif_qp), ep->remote_dev);
qp->remote_qp = NULL;
}
if (qp->local_qp) {
scif_unmap_single(qp->local_qp, ep->remote_dev,
sizeof(struct scif_qp));
qp->local_qp = 0x0;
}
if (qp->local_buf) {
scif_unmap_single(qp->local_buf, ep->remote_dev,
SCIF_ENDPT_QP_SIZE);
qp->local_buf = 0;
}
}
void scif_teardown_ep(void *endpt)
{
struct scif_endpt *ep = endpt;
struct scif_qp *qp = ep->qp_info.qp;
if (qp) {
spin_lock(&ep->lock);
scif_cleanup_ep_qp(ep);
spin_unlock(&ep->lock);
kfree(qp->inbound_q.rb_base);
kfree(qp);
}
}
/*
* Enqueue the endpoint to the zombie list for cleanup.
* The endpoint should not be accessed once this API returns.
*/
void scif_add_epd_to_zombie_list(struct scif_endpt *ep, bool eplock_held)
{
if (!eplock_held)
spin_lock(&scif_info.eplock);
spin_lock(&ep->lock);
ep->state = SCIFEP_ZOMBIE;
spin_unlock(&ep->lock);
list_add_tail(&ep->list, &scif_info.zombie);
scif_info.nr_zombies++;
if (!eplock_held)
spin_unlock(&scif_info.eplock);
schedule_work(&scif_info.misc_work);
}
void scif_cleanup_zombie_epd(void)
{
struct list_head *pos, *tmpq;
struct scif_endpt *ep;
spin_lock(&scif_info.eplock);
list_for_each_safe(pos, tmpq, &scif_info.zombie) {
ep = list_entry(pos, struct scif_endpt, list);
list_del(pos);
scif_info.nr_zombies--;
kfree(ep);
}
spin_unlock(&scif_info.eplock);
}
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