100 lines · c
1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause2/*3 * Copyright(c) 2016 - 2018 Intel Corporation.4 */5 6#include "hfi.h"7#include "verbs_txreq.h"8#include "qp.h"9#include "trace.h"10 11#define TXREQ_LEN 2412 13void hfi1_put_txreq(struct verbs_txreq *tx)14{15 struct hfi1_ibdev *dev;16 struct rvt_qp *qp;17 unsigned long flags;18 unsigned int seq;19 struct hfi1_qp_priv *priv;20 21 qp = tx->qp;22 dev = to_idev(qp->ibqp.device);23 24 if (tx->mr)25 rvt_put_mr(tx->mr);26 27 sdma_txclean(dd_from_dev(dev), &tx->txreq);28 29 /* Free verbs_txreq and return to slab cache */30 kmem_cache_free(dev->verbs_txreq_cache, tx);31 32 do {33 seq = read_seqbegin(&dev->txwait_lock);34 if (!list_empty(&dev->txwait)) {35 struct iowait *wait;36 37 write_seqlock_irqsave(&dev->txwait_lock, flags);38 wait = list_first_entry(&dev->txwait, struct iowait,39 list);40 qp = iowait_to_qp(wait);41 priv = qp->priv;42 list_del_init(&priv->s_iowait.list);43 /* refcount held until actual wake up */44 write_sequnlock_irqrestore(&dev->txwait_lock, flags);45 hfi1_qp_wakeup(qp, RVT_S_WAIT_TX);46 break;47 }48 } while (read_seqretry(&dev->txwait_lock, seq));49}50 51struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,52 struct rvt_qp *qp)53 __must_hold(&qp->s_lock)54{55 struct verbs_txreq *tx = NULL;56 57 write_seqlock(&dev->txwait_lock);58 if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {59 struct hfi1_qp_priv *priv;60 61 tx = kmem_cache_alloc(dev->verbs_txreq_cache, VERBS_TXREQ_GFP);62 if (tx)63 goto out;64 priv = qp->priv;65 if (list_empty(&priv->s_iowait.list)) {66 dev->n_txwait++;67 qp->s_flags |= RVT_S_WAIT_TX;68 list_add_tail(&priv->s_iowait.list, &dev->txwait);69 priv->s_iowait.lock = &dev->txwait_lock;70 trace_hfi1_qpsleep(qp, RVT_S_WAIT_TX);71 rvt_get_qp(qp);72 }73 qp->s_flags &= ~RVT_S_BUSY;74 }75out:76 write_sequnlock(&dev->txwait_lock);77 return tx;78}79 80int verbs_txreq_init(struct hfi1_ibdev *dev)81{82 char buf[TXREQ_LEN];83 struct hfi1_devdata *dd = dd_from_dev(dev);84 85 snprintf(buf, sizeof(buf), "hfi1_%u_vtxreq_cache", dd->unit);86 dev->verbs_txreq_cache = kmem_cache_create(buf,87 sizeof(struct verbs_txreq),88 0, SLAB_HWCACHE_ALIGN,89 NULL);90 if (!dev->verbs_txreq_cache)91 return -ENOMEM;92 return 0;93}94 95void verbs_txreq_exit(struct hfi1_ibdev *dev)96{97 kmem_cache_destroy(dev->verbs_txreq_cache);98 dev->verbs_txreq_cache = NULL;99}100