// 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; }