100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
|
|
/*
|
|
* Copyright(c) 2016 - 2018 Intel Corporation.
|
|
*/
|
|
|
|
#include "hfi.h"
|
|
#include "verbs_txreq.h"
|
|
#include "qp.h"
|
|
#include "trace.h"
|
|
|
|
#define TXREQ_LEN 24
|
|
|
|
void hfi1_put_txreq(struct verbs_txreq *tx)
|
|
{
|
|
struct hfi1_ibdev *dev;
|
|
struct rvt_qp *qp;
|
|
unsigned long flags;
|
|
unsigned int seq;
|
|
struct hfi1_qp_priv *priv;
|
|
|
|
qp = tx->qp;
|
|
dev = to_idev(qp->ibqp.device);
|
|
|
|
if (tx->mr)
|
|
rvt_put_mr(tx->mr);
|
|
|
|
sdma_txclean(dd_from_dev(dev), &tx->txreq);
|
|
|
|
/* Free verbs_txreq and return to slab cache */
|
|
kmem_cache_free(dev->verbs_txreq_cache, tx);
|
|
|
|
do {
|
|
seq = read_seqbegin(&dev->txwait_lock);
|
|
if (!list_empty(&dev->txwait)) {
|
|
struct iowait *wait;
|
|
|
|
write_seqlock_irqsave(&dev->txwait_lock, flags);
|
|
wait = list_first_entry(&dev->txwait, struct iowait,
|
|
list);
|
|
qp = iowait_to_qp(wait);
|
|
priv = qp->priv;
|
|
list_del_init(&priv->s_iowait.list);
|
|
/* refcount held until actual wake up */
|
|
write_sequnlock_irqrestore(&dev->txwait_lock, flags);
|
|
hfi1_qp_wakeup(qp, RVT_S_WAIT_TX);
|
|
break;
|
|
}
|
|
} while (read_seqretry(&dev->txwait_lock, seq));
|
|
}
|
|
|
|
struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,
|
|
struct rvt_qp *qp)
|
|
__must_hold(&qp->s_lock)
|
|
{
|
|
struct verbs_txreq *tx = NULL;
|
|
|
|
write_seqlock(&dev->txwait_lock);
|
|
if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
|
|
struct hfi1_qp_priv *priv;
|
|
|
|
tx = kmem_cache_alloc(dev->verbs_txreq_cache, VERBS_TXREQ_GFP);
|
|
if (tx)
|
|
goto out;
|
|
priv = qp->priv;
|
|
if (list_empty(&priv->s_iowait.list)) {
|
|
dev->n_txwait++;
|
|
qp->s_flags |= RVT_S_WAIT_TX;
|
|
list_add_tail(&priv->s_iowait.list, &dev->txwait);
|
|
priv->s_iowait.lock = &dev->txwait_lock;
|
|
trace_hfi1_qpsleep(qp, RVT_S_WAIT_TX);
|
|
rvt_get_qp(qp);
|
|
}
|
|
qp->s_flags &= ~RVT_S_BUSY;
|
|
}
|
|
out:
|
|
write_sequnlock(&dev->txwait_lock);
|
|
return tx;
|
|
}
|
|
|
|
int verbs_txreq_init(struct hfi1_ibdev *dev)
|
|
{
|
|
char buf[TXREQ_LEN];
|
|
struct hfi1_devdata *dd = dd_from_dev(dev);
|
|
|
|
snprintf(buf, sizeof(buf), "hfi1_%u_vtxreq_cache", dd->unit);
|
|
dev->verbs_txreq_cache = kmem_cache_create(buf,
|
|
sizeof(struct verbs_txreq),
|
|
0, SLAB_HWCACHE_ALIGN,
|
|
NULL);
|
|
if (!dev->verbs_txreq_cache)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
void verbs_txreq_exit(struct hfi1_ibdev *dev)
|
|
{
|
|
kmem_cache_destroy(dev->verbs_txreq_cache);
|
|
dev->verbs_txreq_cache = NULL;
|
|
}
|