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// 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;
}
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