/* * Copyright(c) 2015 - 2020 Intel Corporation. * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * BSD LICENSE * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * - Neither the name of Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include #include #include #include #include #include #include #include #include "hfi.h" #include "qp.h" #include "trace.h" #include "verbs_txreq.h" unsigned int hfi1_qp_table_size = 256; module_param_named(qp_table_size, hfi1_qp_table_size, uint, S_IRUGO); MODULE_PARM_DESC(qp_table_size, "QP table size"); static void flush_tx_list(struct rvt_qp *qp); static int iowait_sleep( struct sdma_engine *sde, struct iowait_work *wait, struct sdma_txreq *stx, unsigned int seq, bool pkts_sent); static void iowait_wakeup(struct iowait *wait, int reason); static void iowait_sdma_drained(struct iowait *wait); static void qp_pio_drain(struct rvt_qp *qp); const struct rvt_operation_params hfi1_post_parms[RVT_OPERATION_MAX] = { [IB_WR_RDMA_WRITE] = { .length = sizeof(struct ib_rdma_wr), .qpt_support = BIT(IB_QPT_UC) | BIT(IB_QPT_RC), }, [IB_WR_RDMA_READ] = { .length = sizeof(struct ib_rdma_wr), .qpt_support = BIT(IB_QPT_RC), .flags = RVT_OPERATION_ATOMIC, }, [IB_WR_ATOMIC_CMP_AND_SWP] = { .length = sizeof(struct ib_atomic_wr), .qpt_support = BIT(IB_QPT_RC), .flags = RVT_OPERATION_ATOMIC | RVT_OPERATION_ATOMIC_SGE, }, [IB_WR_ATOMIC_FETCH_AND_ADD] = { .length = sizeof(struct ib_atomic_wr), .qpt_support = BIT(IB_QPT_RC), .flags = RVT_OPERATION_ATOMIC | RVT_OPERATION_ATOMIC_SGE, }, [IB_WR_RDMA_WRITE_WITH_IMM] = { .length = sizeof(struct ib_rdma_wr), .qpt_support = BIT(IB_QPT_UC) | BIT(IB_QPT_RC), }, [IB_WR_SEND] = { .length = sizeof(struct ib_send_wr), .qpt_support = BIT(IB_QPT_UD) | BIT(IB_QPT_SMI) | BIT(IB_QPT_GSI) | BIT(IB_QPT_UC) | BIT(IB_QPT_RC), }, [IB_WR_SEND_WITH_IMM] = { .length = sizeof(struct ib_send_wr), .qpt_support = BIT(IB_QPT_UD) | BIT(IB_QPT_SMI) | BIT(IB_QPT_GSI) | BIT(IB_QPT_UC) | BIT(IB_QPT_RC), }, [IB_WR_REG_MR] = { .length = sizeof(struct ib_reg_wr), .qpt_support = BIT(IB_QPT_UC) | BIT(IB_QPT_RC), .flags = RVT_OPERATION_LOCAL, }, [IB_WR_LOCAL_INV] = { .length = sizeof(struct ib_send_wr), .qpt_support = BIT(IB_QPT_UC) | BIT(IB_QPT_RC), .flags = RVT_OPERATION_LOCAL, }, [IB_WR_SEND_WITH_INV] = { .length = sizeof(struct ib_send_wr), .qpt_support = BIT(IB_QPT_RC), }, [IB_WR_OPFN] = { .length = sizeof(struct ib_atomic_wr), .qpt_support = BIT(IB_QPT_RC), .flags = RVT_OPERATION_USE_RESERVE, }, [IB_WR_TID_RDMA_WRITE] = { .length = sizeof(struct ib_rdma_wr), .qpt_support = BIT(IB_QPT_RC), .flags = RVT_OPERATION_IGN_RNR_CNT, }, }; static void flush_list_head(struct list_head *l) { while (!list_empty(l)) { struct sdma_txreq *tx; tx = list_first_entry( l, struct sdma_txreq, list); list_del_init(&tx->list); hfi1_put_txreq( container_of(tx, struct verbs_txreq, txreq)); } } static void flush_tx_list(struct rvt_qp *qp) { struct hfi1_qp_priv *priv = qp->priv; flush_list_head(&iowait_get_ib_work(&priv->s_iowait)->tx_head); flush_list_head(&iowait_get_tid_work(&priv->s_iowait)->tx_head); } static void flush_iowait(struct rvt_qp *qp) { struct hfi1_qp_priv *priv = qp->priv; unsigned long flags; seqlock_t *lock = priv->s_iowait.lock; if (!lock) return; write_seqlock_irqsave(lock, flags); if (!list_empty(&priv->s_iowait.list)) { list_del_init(&priv->s_iowait.list); priv->s_iowait.lock = NULL; rvt_put_qp(qp); } write_sequnlock_irqrestore(lock, flags); } /** * This function is what we would push to the core layer if we wanted to be a * "first class citizen". Instead we hide this here and rely on Verbs ULPs * to blindly pass the MTU enum value from the PathRecord to us. */ static inline int verbs_mtu_enum_to_int(struct ib_device *dev, enum ib_mtu mtu) { /* Constraining 10KB packets to 8KB packets */ if (mtu == (enum ib_mtu)OPA_MTU_10240) mtu = (enum ib_mtu)OPA_MTU_8192; return opa_mtu_enum_to_int((enum opa_mtu)mtu); } int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, int attr_mask, struct ib_udata *udata) { struct ib_qp *ibqp = &qp->ibqp; struct hfi1_ibdev *dev = to_idev(ibqp->device); struct hfi1_devdata *dd = dd_from_dev(dev); u8 sc; if (attr_mask & IB_QP_AV) { sc = ah_to_sc(ibqp->device, &attr->ah_attr); if (sc == 0xf) return -EINVAL; if (!qp_to_sdma_engine(qp, sc) && dd->flags & HFI1_HAS_SEND_DMA) return -EINVAL; if (!qp_to_send_context(qp, sc)) return -EINVAL; } if (attr_mask & IB_QP_ALT_PATH) { sc = ah_to_sc(ibqp->device, &attr->alt_ah_attr); if (sc == 0xf) return -EINVAL; if (!qp_to_sdma_engine(qp, sc) && dd->flags & HFI1_HAS_SEND_DMA) return -EINVAL; if (!qp_to_send_context(qp, sc)) return -EINVAL; } return 0; } /* * qp_set_16b - Set the hdr_type based on whether the slid or the * dlid in the connection is extended. Only applicable for RC and UC * QPs. UD QPs determine this on the fly from the ah in the wqe */ static inline void qp_set_16b(struct rvt_qp *qp) { struct hfi1_pportdata *ppd; struct hfi1_ibport *ibp; struct hfi1_qp_priv *priv = qp->priv; /* Update ah_attr to account for extended LIDs */ hfi1_update_ah_attr(qp->ibqp.device, &qp->remote_ah_attr); /* Create 32 bit LIDs */ hfi1_make_opa_lid(&qp->remote_ah_attr); if (!(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)) return; ibp = to_iport(qp->ibqp.device, qp->port_num); ppd = ppd_from_ibp(ibp); priv->hdr_type = hfi1_get_hdr_type(ppd->lid, &qp->remote_ah_attr); } void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, int attr_mask, struct ib_udata *udata) { struct ib_qp *ibqp = &qp->ibqp; struct hfi1_qp_priv *priv = qp->priv; if (attr_mask & IB_QP_AV) { priv->s_sc = ah_to_sc(ibqp->device, &qp->remote_ah_attr); priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc); qp_set_16b(qp); } if (attr_mask & IB_QP_PATH_MIG_STATE && attr->path_mig_state == IB_MIG_MIGRATED && qp->s_mig_state == IB_MIG_ARMED) { qp->s_flags |= HFI1_S_AHG_CLEAR; priv->s_sc = ah_to_sc(ibqp->device, &qp->remote_ah_attr); priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc); qp_set_16b(qp); } opfn_qp_init(qp, attr, attr_mask); } /** * hfi1_setup_wqe - set up the wqe * @qp - The qp * @wqe - The built wqe * @call_send - Determine if the send should be posted or scheduled. * * Perform setup of the wqe. This is called * prior to inserting the wqe into the ring but after * the wqe has been setup by RDMAVT. This function * allows the driver the opportunity to perform * validation and additional setup of the wqe. * * Returns 0 on success, -EINVAL on failure * */ int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe, bool *call_send) { struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); struct rvt_ah *ah; struct hfi1_pportdata *ppd; struct hfi1_devdata *dd; switch (qp->ibqp.qp_type) { case IB_QPT_RC: hfi1_setup_tid_rdma_wqe(qp, wqe); fallthrough; case IB_QPT_UC: if (wqe->length > 0x80000000U) return -EINVAL; if (wqe->length > qp->pmtu) *call_send = false; break; case IB_QPT_SMI: /* * SM packets should exclusively use VL15 and their SL is * ignored (IBTA v1.3, Section 3.5.8.2). Therefore, when ah * is created, SL is 0 in most cases and as a result some * fields (vl and pmtu) in ah may not be set correctly, * depending on the SL2SC and SC2VL tables at the time. */ ppd = ppd_from_ibp(ibp); dd = dd_from_ppd(ppd); if (wqe->length > dd->vld[15].mtu) return -EINVAL; break; case IB_QPT_GSI: case IB_QPT_UD: ah = rvt_get_swqe_ah(wqe); if (wqe->length > (1 << ah->log_pmtu)) return -EINVAL; if (ibp->sl_to_sc[rdma_ah_get_sl(&ah->attr)] == 0xf) return -EINVAL; default: break; } /* * System latency between send and schedule is large enough that * forcing call_send to true for piothreshold packets is necessary. */ if (wqe->length <= piothreshold) *call_send = true; return 0; } /** * _hfi1_schedule_send - schedule progress * @qp: the QP * * This schedules qp progress w/o regard to the s_flags. * * It is only used in the post send, which doesn't hold * the s_lock. */ bool _hfi1_schedule_send(struct rvt_qp *qp) { struct hfi1_qp_priv *priv = qp->priv; struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); struct hfi1_devdata *dd = ppd->dd; if (dd->flags & HFI1_SHUTDOWN) return true; return iowait_schedule(&priv->s_iowait, ppd->hfi1_wq, priv->s_sde ? priv->s_sde->cpu : cpumask_first(cpumask_of_node(dd->node))); } static void qp_pio_drain(struct rvt_qp *qp) { struct hfi1_qp_priv *priv = qp->priv; if (!priv->s_sendcontext) return; while (iowait_pio_pending(&priv->s_iowait)) { write_seqlock_irq(&priv->s_sendcontext->waitlock); hfi1_sc_wantpiobuf_intr(priv->s_sendcontext, 1); write_sequnlock_irq(&priv->s_sendcontext->waitlock); iowait_pio_drain(&priv->s_iowait); write_seqlock_irq(&priv->s_sendcontext->waitlock); hfi1_sc_wantpiobuf_intr(priv->s_sendcontext, 0); write_sequnlock_irq(&priv->s_sendcontext->waitlock); } } /** * hfi1_schedule_send - schedule progress * @qp: the QP * * This schedules qp progress and caller should hold * the s_lock. * @return true if the first leg is scheduled; * false if the first leg is not scheduled. */ bool hfi1_schedule_send(struct rvt_qp *qp) { lockdep_assert_held(&qp->s_lock); if (hfi1_send_ok(qp)) { _hfi1_schedule_send(qp); return true; } if (qp->s_flags & HFI1_S_ANY_WAIT_IO) iowait_set_flag(&((struct hfi1_qp_priv *)qp->priv)->s_iowait, IOWAIT_PENDING_IB); return false; } static void hfi1_qp_schedule(struct rvt_qp *qp) { struct hfi1_qp_priv *priv = qp->priv; bool ret; if (iowait_flag_set(&priv->s_iowait, IOWAIT_PENDING_IB)) { ret = hfi1_schedule_send(qp); if (ret) iowait_clear_flag(&priv->s_iowait, IOWAIT_PENDING_IB); } if (iowait_flag_set(&priv->s_iowait, IOWAIT_PENDING_TID)) { ret = hfi1_schedule_tid_send(qp); if (ret) iowait_clear_flag(&priv->s_iowait, IOWAIT_PENDING_TID); } } void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag) { unsigned long flags; spin_lock_irqsave(&qp->s_lock, flags); if (qp->s_flags & flag) { qp->s_flags &= ~flag; trace_hfi1_qpwakeup(qp, flag); hfi1_qp_schedule(qp); } spin_unlock_irqrestore(&qp->s_lock, flags); /* Notify hfi1_destroy_qp() if it is waiting. */ rvt_put_qp(qp); } void hfi1_qp_unbusy(struct rvt_qp *qp, struct iowait_work *wait) { struct hfi1_qp_priv *priv = qp->priv; if (iowait_set_work_flag(wait) == IOWAIT_IB_SE) { qp->s_flags &= ~RVT_S_BUSY; /* * If we are sending a first-leg packet from the second leg, * we need to clear the busy flag from priv->s_flags to * avoid a race condition when the qp wakes up before * the call to hfi1_verbs_send() returns to the second * leg. In that case, the second leg will terminate without * being re-scheduled, resulting in failure to send TID RDMA * WRITE DATA and TID RDMA ACK packets. */ if (priv->s_flags & HFI1_S_TID_BUSY_SET) { priv->s_flags &= ~(HFI1_S_TID_BUSY_SET | RVT_S_BUSY); iowait_set_flag(&priv->s_iowait, IOWAIT_PENDING_TID); } } else { priv->s_flags &= ~RVT_S_BUSY; } } static int iowait_sleep( struct sdma_engine *sde, struct iowait_work *wait, struct sdma_txreq *stx, uint seq, bool pkts_sent) { struct verbs_txreq *tx = container_of(stx, struct verbs_txreq, txreq); struct rvt_qp *qp; struct hfi1_qp_priv *priv; unsigned long flags; int ret = 0; qp = tx->qp; priv = qp->priv; spin_lock_irqsave(&qp->s_lock, flags); if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) { /* * If we couldn't queue the DMA request, save the info * and try again later rather than destroying the * buffer and undoing the side effects of the copy. */ /* Make a common routine? */ list_add_tail(&stx->list, &wait->tx_head); write_seqlock(&sde->waitlock); if (sdma_progress(sde, seq, stx)) goto eagain; if (list_empty(&priv->s_iowait.list)) { struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); ibp->rvp.n_dmawait++; qp->s_flags |= RVT_S_WAIT_DMA_DESC; iowait_get_priority(&priv->s_iowait); iowait_queue(pkts_sent, &priv->s_iowait, &sde->dmawait); priv->s_iowait.lock = &sde->waitlock; trace_hfi1_qpsleep(qp, RVT_S_WAIT_DMA_DESC); rvt_get_qp(qp); } write_sequnlock(&sde->waitlock); hfi1_qp_unbusy(qp, wait); spin_unlock_irqrestore(&qp->s_lock, flags); ret = -EBUSY; } else { spin_unlock_irqrestore(&qp->s_lock, flags); hfi1_put_txreq(tx); } return ret; eagain: write_sequnlock(&sde->waitlock); spin_unlock_irqrestore(&qp->s_lock, flags); list_del_init(&stx->list); return -EAGAIN; } static void iowait_wakeup(struct iowait *wait, int reason) { struct rvt_qp *qp = iowait_to_qp(wait); WARN_ON(reason != SDMA_AVAIL_REASON); hfi1_qp_wakeup(qp, RVT_S_WAIT_DMA_DESC); } static void iowait_sdma_drained(struct iowait *wait) { struct rvt_qp *qp = iowait_to_qp(wait); unsigned long flags; /* * This happens when the send engine notes * a QP in the error state and cannot * do the flush work until that QP's * sdma work has finished. */ spin_lock_irqsave(&qp->s_lock, flags); if (qp->s_flags & RVT_S_WAIT_DMA) { qp->s_flags &= ~RVT_S_WAIT_DMA; hfi1_schedule_send(qp); } spin_unlock_irqrestore(&qp->s_lock, flags); } static void hfi1_init_priority(struct iowait *w) { struct rvt_qp *qp = iowait_to_qp(w); struct hfi1_qp_priv *priv = qp->priv; if (qp->s_flags & RVT_S_ACK_PENDING) w->priority++; if (priv->s_flags & RVT_S_ACK_PENDING) w->priority++; } /** * qp_to_sdma_engine - map a qp to a send engine * @qp: the QP * @sc5: the 5 bit sc * * Return: * A send engine for the qp or NULL for SMI type qp. */ struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5) { struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device); struct sdma_engine *sde; if (!(dd->flags & HFI1_HAS_SEND_DMA)) return NULL; switch (qp->ibqp.qp_type) { case IB_QPT_SMI: return NULL; default: break; } sde = sdma_select_engine_sc(dd, qp->ibqp.qp_num >> dd->qos_shift, sc5); return sde; } /* * qp_to_send_context - map a qp to a send context * @qp: the QP * @sc5: the 5 bit sc * * Return: * A send context for the qp */ struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5) { struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device); switch (qp->ibqp.qp_type) { case IB_QPT_SMI: /* SMA packets to VL15 */ return dd->vld[15].sc; default: break; } return pio_select_send_context_sc(dd, qp->ibqp.qp_num >> dd->qos_shift, sc5); } static const char * const qp_type_str[] = { "SMI", "GSI", "RC", "UC", "UD", }; static int qp_idle(struct rvt_qp *qp) { return qp->s_last == qp->s_acked && qp->s_acked == qp->s_cur && qp->s_cur == qp->s_tail && qp->s_tail == qp->s_head; } /** * qp_iter_print - print the qp information to seq_file * @s: the seq_file to emit the qp information on * @iter: the iterator for the qp hash list */ void qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter) { struct rvt_swqe *wqe; struct rvt_qp *qp = iter->qp; struct hfi1_qp_priv *priv = qp->priv; struct sdma_engine *sde; struct send_context *send_context; struct rvt_ack_entry *e = NULL; struct rvt_srq *srq = qp->ibqp.srq ? ibsrq_to_rvtsrq(qp->ibqp.srq) : NULL; sde = qp_to_sdma_engine(qp, priv->s_sc); wqe = rvt_get_swqe_ptr(qp, qp->s_last); send_context = qp_to_send_context(qp, priv->s_sc); if (qp->s_ack_queue) e = &qp->s_ack_queue[qp->s_tail_ack_queue]; seq_printf(s, "N %d %s QP %x R %u %s %u %u f=%x %u %u %u %u %u %u SPSN %x %x %x %x %x RPSN %x S(%u %u %u %u %u %u %u) R(%u %u %u) RQP %x LID %x SL %u MTU %u %u %u %u %u SDE %p,%u SC %p,%u SCQ %u %u PID %d OS %x %x E %x %x %x RNR %d %s %d\n", iter->n, qp_idle(qp) ? "I" : "B", qp->ibqp.qp_num, atomic_read(&qp->refcount), qp_type_str[qp->ibqp.qp_type], qp->state, wqe ? wqe->wr.opcode : 0, qp->s_flags, iowait_sdma_pending(&priv->s_iowait), iowait_pio_pending(&priv->s_iowait), !list_empty(&priv->s_iowait.list), qp->timeout, wqe ? wqe->ssn : 0, qp->s_lsn, qp->s_last_psn, qp->s_psn, qp->s_next_psn, qp->s_sending_psn, qp->s_sending_hpsn, qp->r_psn, qp->s_last, qp->s_acked, qp->s_cur, qp->s_tail, qp->s_head, qp->s_size, qp->s_avail, /* ack_queue ring pointers, size */ qp->s_tail_ack_queue, qp->r_head_ack_queue, rvt_max_atomic(&to_idev(qp->ibqp.device)->rdi), /* remote QP info */ qp->remote_qpn, rdma_ah_get_dlid(&qp->remote_ah_attr), rdma_ah_get_sl(&qp->remote_ah_attr), qp->pmtu, qp->s_retry, qp->s_retry_cnt, qp->s_rnr_retry_cnt, qp->s_rnr_retry, sde, sde ? sde->this_idx : 0, send_context, send_context ? send_context->sw_index : 0, ib_cq_head(qp->ibqp.send_cq), ib_cq_tail(qp->ibqp.send_cq), qp->pid, qp->s_state, qp->s_ack_state, /* ack queue information */ e ? e->opcode : 0, e ? e->psn : 0, e ? e->lpsn : 0, qp->r_min_rnr_timer, srq ? "SRQ" : "RQ", srq ? srq->rq.size : qp->r_rq.size ); } void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp) { struct hfi1_qp_priv *priv; priv = kzalloc_node(sizeof(*priv), GFP_KERNEL, rdi->dparms.node); if (!priv) return ERR_PTR(-ENOMEM); priv->owner = qp; priv->s_ahg = kzalloc_node(sizeof(*priv->s_ahg), GFP_KERNEL, rdi->dparms.node); if (!priv->s_ahg) { kfree(priv); return ERR_PTR(-ENOMEM); } iowait_init( &priv->s_iowait, 1, _hfi1_do_send, _hfi1_do_tid_send, iowait_sleep, iowait_wakeup, iowait_sdma_drained, hfi1_init_priority); /* Init to a value to start the running average correctly */ priv->s_running_pkt_size = piothreshold / 2; return priv; } void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp) { struct hfi1_qp_priv *priv = qp->priv; hfi1_qp_priv_tid_free(rdi, qp); kfree(priv->s_ahg); kfree(priv); } unsigned free_all_qps(struct rvt_dev_info *rdi) { struct hfi1_ibdev *verbs_dev = container_of(rdi, struct hfi1_ibdev, rdi); struct hfi1_devdata *dd = container_of(verbs_dev, struct hfi1_devdata, verbs_dev); int n; unsigned qp_inuse = 0; for (n = 0; n < dd->num_pports; n++) { struct hfi1_ibport *ibp = &dd->pport[n].ibport_data; rcu_read_lock(); if (rcu_dereference(ibp->rvp.qp[0])) qp_inuse++; if (rcu_dereference(ibp->rvp.qp[1])) qp_inuse++; rcu_read_unlock(); } return qp_inuse; } void flush_qp_waiters(struct rvt_qp *qp) { lockdep_assert_held(&qp->s_lock); flush_iowait(qp); hfi1_tid_rdma_flush_wait(qp); } void stop_send_queue(struct rvt_qp *qp) { struct hfi1_qp_priv *priv = qp->priv; iowait_cancel_work(&priv->s_iowait); if (cancel_work_sync(&priv->tid_rdma.trigger_work)) rvt_put_qp(qp); } void quiesce_qp(struct rvt_qp *qp) { struct hfi1_qp_priv *priv = qp->priv; hfi1_del_tid_reap_timer(qp); hfi1_del_tid_retry_timer(qp); iowait_sdma_drain(&priv->s_iowait); qp_pio_drain(qp); flush_tx_list(qp); } void notify_qp_reset(struct rvt_qp *qp) { hfi1_qp_kern_exp_rcv_clear_all(qp); qp->r_adefered = 0; clear_ahg(qp); /* Clear any OPFN state */ if (qp->ibqp.qp_type == IB_QPT_RC) opfn_conn_error(qp); } /* * Switch to alternate path. * The QP s_lock should be held and interrupts disabled. */ void hfi1_migrate_qp(struct rvt_qp *qp) { struct hfi1_qp_priv *priv = qp->priv; struct ib_event ev; qp->s_mig_state = IB_MIG_MIGRATED; qp->remote_ah_attr = qp->alt_ah_attr; qp->port_num = rdma_ah_get_port_num(&qp->alt_ah_attr); qp->s_pkey_index = qp->s_alt_pkey_index; qp->s_flags |= HFI1_S_AHG_CLEAR; priv->s_sc = ah_to_sc(qp->ibqp.device, &qp->remote_ah_attr); priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); qp_set_16b(qp); ev.device = qp->ibqp.device; ev.element.qp = &qp->ibqp; ev.event = IB_EVENT_PATH_MIG; qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); } int mtu_to_path_mtu(u32 mtu) { return mtu_to_enum(mtu, OPA_MTU_8192); } u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu) { u32 mtu; struct hfi1_ibdev *verbs_dev = container_of(rdi, struct hfi1_ibdev, rdi); struct hfi1_devdata *dd = container_of(verbs_dev, struct hfi1_devdata, verbs_dev); struct hfi1_ibport *ibp; u8 sc, vl; ibp = &dd->pport[qp->port_num - 1].ibport_data; sc = ibp->sl_to_sc[rdma_ah_get_sl(&qp->remote_ah_attr)]; vl = sc_to_vlt(dd, sc); mtu = verbs_mtu_enum_to_int(qp->ibqp.device, pmtu); if (vl < PER_VL_SEND_CONTEXTS) mtu = min_t(u32, mtu, dd->vld[vl].mtu); return mtu; } int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp, struct ib_qp_attr *attr) { int mtu, pidx = qp->port_num - 1; struct hfi1_ibdev *verbs_dev = container_of(rdi, struct hfi1_ibdev, rdi); struct hfi1_devdata *dd = container_of(verbs_dev, struct hfi1_devdata, verbs_dev); mtu = verbs_mtu_enum_to_int(qp->ibqp.device, attr->path_mtu); if (mtu == -1) return -1; /* values less than 0 are error */ if (mtu > dd->pport[pidx].ibmtu) return mtu_to_enum(dd->pport[pidx].ibmtu, IB_MTU_2048); else return attr->path_mtu; } void notify_error_qp(struct rvt_qp *qp) { struct hfi1_qp_priv *priv = qp->priv; seqlock_t *lock = priv->s_iowait.lock; if (lock) { write_seqlock(lock); if (!list_empty(&priv->s_iowait.list) && !(qp->s_flags & RVT_S_BUSY) && !(priv->s_flags & RVT_S_BUSY)) { qp->s_flags &= ~HFI1_S_ANY_WAIT_IO; iowait_clear_flag(&priv->s_iowait, IOWAIT_PENDING_IB); iowait_clear_flag(&priv->s_iowait, IOWAIT_PENDING_TID); list_del_init(&priv->s_iowait.list); priv->s_iowait.lock = NULL; rvt_put_qp(qp); } write_sequnlock(lock); } if (!(qp->s_flags & RVT_S_BUSY) && !(priv->s_flags & RVT_S_BUSY)) { qp->s_hdrwords = 0; if (qp->s_rdma_mr) { rvt_put_mr(qp->s_rdma_mr); qp->s_rdma_mr = NULL; } flush_tx_list(qp); } } /** * hfi1_qp_iter_cb - callback for iterator * @qp - the qp * @v - the sl in low bits of v * * This is called from the iterator callback to work * on an individual qp. */ static void hfi1_qp_iter_cb(struct rvt_qp *qp, u64 v) { int lastwqe; struct ib_event ev; struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); u8 sl = (u8)v; if (qp->port_num != ppd->port || (qp->ibqp.qp_type != IB_QPT_UC && qp->ibqp.qp_type != IB_QPT_RC) || rdma_ah_get_sl(&qp->remote_ah_attr) != sl || !(ib_rvt_state_ops[qp->state] & RVT_POST_SEND_OK)) return; spin_lock_irq(&qp->r_lock); spin_lock(&qp->s_hlock); spin_lock(&qp->s_lock); lastwqe = rvt_error_qp(qp, IB_WC_WR_FLUSH_ERR); spin_unlock(&qp->s_lock); spin_unlock(&qp->s_hlock); spin_unlock_irq(&qp->r_lock); if (lastwqe) { ev.device = qp->ibqp.device; ev.element.qp = &qp->ibqp; ev.event = IB_EVENT_QP_LAST_WQE_REACHED; qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); } } /** * hfi1_error_port_qps - put a port's RC/UC qps into error state * @ibp: the ibport. * @sl: the service level. * * This function places all RC/UC qps with a given service level into error * state. It is generally called to force upper lay apps to abandon stale qps * after an sl->sc mapping change. */ void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl) { struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); struct hfi1_ibdev *dev = &ppd->dd->verbs_dev; rvt_qp_iter(&dev->rdi, sl, hfi1_qp_iter_cb); }