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