1f48ad614SDennis Dalessandro /* 2f48ad614SDennis Dalessandro * Copyright(c) 2015, 2016 Intel Corporation. 3f48ad614SDennis Dalessandro * 4f48ad614SDennis Dalessandro * This file is provided under a dual BSD/GPLv2 license. When using or 5f48ad614SDennis Dalessandro * redistributing this file, you may do so under either license. 6f48ad614SDennis Dalessandro * 7f48ad614SDennis Dalessandro * GPL LICENSE SUMMARY 8f48ad614SDennis Dalessandro * 9f48ad614SDennis Dalessandro * This program is free software; you can redistribute it and/or modify 10f48ad614SDennis Dalessandro * it under the terms of version 2 of the GNU General Public License as 11f48ad614SDennis Dalessandro * published by the Free Software Foundation. 12f48ad614SDennis Dalessandro * 13f48ad614SDennis Dalessandro * This program is distributed in the hope that it will be useful, but 14f48ad614SDennis Dalessandro * WITHOUT ANY WARRANTY; without even the implied warranty of 15f48ad614SDennis Dalessandro * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16f48ad614SDennis Dalessandro * General Public License for more details. 17f48ad614SDennis Dalessandro * 18f48ad614SDennis Dalessandro * BSD LICENSE 19f48ad614SDennis Dalessandro * 20f48ad614SDennis Dalessandro * Redistribution and use in source and binary forms, with or without 21f48ad614SDennis Dalessandro * modification, are permitted provided that the following conditions 22f48ad614SDennis Dalessandro * are met: 23f48ad614SDennis Dalessandro * 24f48ad614SDennis Dalessandro * - Redistributions of source code must retain the above copyright 25f48ad614SDennis Dalessandro * notice, this list of conditions and the following disclaimer. 26f48ad614SDennis Dalessandro * - Redistributions in binary form must reproduce the above copyright 27f48ad614SDennis Dalessandro * notice, this list of conditions and the following disclaimer in 28f48ad614SDennis Dalessandro * the documentation and/or other materials provided with the 29f48ad614SDennis Dalessandro * distribution. 30f48ad614SDennis Dalessandro * - Neither the name of Intel Corporation nor the names of its 31f48ad614SDennis Dalessandro * contributors may be used to endorse or promote products derived 32f48ad614SDennis Dalessandro * from this software without specific prior written permission. 33f48ad614SDennis Dalessandro * 34f48ad614SDennis Dalessandro * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 35f48ad614SDennis Dalessandro * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 36f48ad614SDennis Dalessandro * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 37f48ad614SDennis Dalessandro * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 38f48ad614SDennis Dalessandro * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 39f48ad614SDennis Dalessandro * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 40f48ad614SDennis Dalessandro * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 41f48ad614SDennis Dalessandro * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 42f48ad614SDennis Dalessandro * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 43f48ad614SDennis Dalessandro * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 44f48ad614SDennis Dalessandro * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 45f48ad614SDennis Dalessandro * 46f48ad614SDennis Dalessandro */ 47f48ad614SDennis Dalessandro 48f48ad614SDennis Dalessandro #include <linux/net.h> 49f48ad614SDennis Dalessandro #include <rdma/ib_smi.h> 50f48ad614SDennis Dalessandro 51f48ad614SDennis Dalessandro #include "hfi.h" 52f48ad614SDennis Dalessandro #include "mad.h" 53f48ad614SDennis Dalessandro #include "verbs_txreq.h" 54f48ad614SDennis Dalessandro #include "qp.h" 55f48ad614SDennis Dalessandro 56f48ad614SDennis Dalessandro /** 57f48ad614SDennis Dalessandro * ud_loopback - handle send on loopback QPs 58f48ad614SDennis Dalessandro * @sqp: the sending QP 59f48ad614SDennis Dalessandro * @swqe: the send work request 60f48ad614SDennis Dalessandro * 61f48ad614SDennis Dalessandro * This is called from hfi1_make_ud_req() to forward a WQE addressed 62f48ad614SDennis Dalessandro * to the same HFI. 63f48ad614SDennis Dalessandro * Note that the receive interrupt handler may be calling hfi1_ud_rcv() 64f48ad614SDennis Dalessandro * while this is being called. 65f48ad614SDennis Dalessandro */ 66f48ad614SDennis Dalessandro static void ud_loopback(struct rvt_qp *sqp, struct rvt_swqe *swqe) 67f48ad614SDennis Dalessandro { 68f48ad614SDennis Dalessandro struct hfi1_ibport *ibp = to_iport(sqp->ibqp.device, sqp->port_num); 69f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd; 70f48ad614SDennis Dalessandro struct rvt_qp *qp; 71f48ad614SDennis Dalessandro struct ib_ah_attr *ah_attr; 72f48ad614SDennis Dalessandro unsigned long flags; 73f48ad614SDennis Dalessandro struct rvt_sge_state ssge; 74f48ad614SDennis Dalessandro struct rvt_sge *sge; 75f48ad614SDennis Dalessandro struct ib_wc wc; 76f48ad614SDennis Dalessandro u32 length; 77f48ad614SDennis Dalessandro enum ib_qp_type sqptype, dqptype; 78f48ad614SDennis Dalessandro 79f48ad614SDennis Dalessandro rcu_read_lock(); 80f48ad614SDennis Dalessandro 81f48ad614SDennis Dalessandro qp = rvt_lookup_qpn(ib_to_rvt(sqp->ibqp.device), &ibp->rvp, 82f48ad614SDennis Dalessandro swqe->ud_wr.remote_qpn); 83f48ad614SDennis Dalessandro if (!qp) { 84f48ad614SDennis Dalessandro ibp->rvp.n_pkt_drops++; 85f48ad614SDennis Dalessandro rcu_read_unlock(); 86f48ad614SDennis Dalessandro return; 87f48ad614SDennis Dalessandro } 88f48ad614SDennis Dalessandro 89f48ad614SDennis Dalessandro sqptype = sqp->ibqp.qp_type == IB_QPT_GSI ? 90f48ad614SDennis Dalessandro IB_QPT_UD : sqp->ibqp.qp_type; 91f48ad614SDennis Dalessandro dqptype = qp->ibqp.qp_type == IB_QPT_GSI ? 92f48ad614SDennis Dalessandro IB_QPT_UD : qp->ibqp.qp_type; 93f48ad614SDennis Dalessandro 94f48ad614SDennis Dalessandro if (dqptype != sqptype || 95f48ad614SDennis Dalessandro !(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) { 96f48ad614SDennis Dalessandro ibp->rvp.n_pkt_drops++; 97f48ad614SDennis Dalessandro goto drop; 98f48ad614SDennis Dalessandro } 99f48ad614SDennis Dalessandro 100f48ad614SDennis Dalessandro ah_attr = &ibah_to_rvtah(swqe->ud_wr.ah)->attr; 101f48ad614SDennis Dalessandro ppd = ppd_from_ibp(ibp); 102f48ad614SDennis Dalessandro 103f48ad614SDennis Dalessandro if (qp->ibqp.qp_num > 1) { 104f48ad614SDennis Dalessandro u16 pkey; 105f48ad614SDennis Dalessandro u16 slid; 106f48ad614SDennis Dalessandro u8 sc5 = ibp->sl_to_sc[ah_attr->sl]; 107f48ad614SDennis Dalessandro 108f48ad614SDennis Dalessandro pkey = hfi1_get_pkey(ibp, sqp->s_pkey_index); 109f48ad614SDennis Dalessandro slid = ppd->lid | (ah_attr->src_path_bits & 110f48ad614SDennis Dalessandro ((1 << ppd->lmc) - 1)); 111f48ad614SDennis Dalessandro if (unlikely(ingress_pkey_check(ppd, pkey, sc5, 112f48ad614SDennis Dalessandro qp->s_pkey_index, slid))) { 113f48ad614SDennis Dalessandro hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_P_KEY, pkey, 114f48ad614SDennis Dalessandro ah_attr->sl, 115f48ad614SDennis Dalessandro sqp->ibqp.qp_num, qp->ibqp.qp_num, 116f48ad614SDennis Dalessandro slid, ah_attr->dlid); 117f48ad614SDennis Dalessandro goto drop; 118f48ad614SDennis Dalessandro } 119f48ad614SDennis Dalessandro } 120f48ad614SDennis Dalessandro 121f48ad614SDennis Dalessandro /* 122f48ad614SDennis Dalessandro * Check that the qkey matches (except for QP0, see 9.6.1.4.1). 123f48ad614SDennis Dalessandro * Qkeys with the high order bit set mean use the 124f48ad614SDennis Dalessandro * qkey from the QP context instead of the WR (see 10.2.5). 125f48ad614SDennis Dalessandro */ 126f48ad614SDennis Dalessandro if (qp->ibqp.qp_num) { 127f48ad614SDennis Dalessandro u32 qkey; 128f48ad614SDennis Dalessandro 129f48ad614SDennis Dalessandro qkey = (int)swqe->ud_wr.remote_qkey < 0 ? 130f48ad614SDennis Dalessandro sqp->qkey : swqe->ud_wr.remote_qkey; 131f48ad614SDennis Dalessandro if (unlikely(qkey != qp->qkey)) { 132f48ad614SDennis Dalessandro u16 lid; 133f48ad614SDennis Dalessandro 134f48ad614SDennis Dalessandro lid = ppd->lid | (ah_attr->src_path_bits & 135f48ad614SDennis Dalessandro ((1 << ppd->lmc) - 1)); 136f48ad614SDennis Dalessandro hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_Q_KEY, qkey, 137f48ad614SDennis Dalessandro ah_attr->sl, 138f48ad614SDennis Dalessandro sqp->ibqp.qp_num, qp->ibqp.qp_num, 139f48ad614SDennis Dalessandro lid, 140f48ad614SDennis Dalessandro ah_attr->dlid); 141f48ad614SDennis Dalessandro goto drop; 142f48ad614SDennis Dalessandro } 143f48ad614SDennis Dalessandro } 144f48ad614SDennis Dalessandro 145f48ad614SDennis Dalessandro /* 146f48ad614SDennis Dalessandro * A GRH is expected to precede the data even if not 147f48ad614SDennis Dalessandro * present on the wire. 148f48ad614SDennis Dalessandro */ 149f48ad614SDennis Dalessandro length = swqe->length; 150f48ad614SDennis Dalessandro memset(&wc, 0, sizeof(wc)); 151f48ad614SDennis Dalessandro wc.byte_len = length + sizeof(struct ib_grh); 152f48ad614SDennis Dalessandro 153f48ad614SDennis Dalessandro if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) { 154f48ad614SDennis Dalessandro wc.wc_flags = IB_WC_WITH_IMM; 155f48ad614SDennis Dalessandro wc.ex.imm_data = swqe->wr.ex.imm_data; 156f48ad614SDennis Dalessandro } 157f48ad614SDennis Dalessandro 158f48ad614SDennis Dalessandro spin_lock_irqsave(&qp->r_lock, flags); 159f48ad614SDennis Dalessandro 160f48ad614SDennis Dalessandro /* 161f48ad614SDennis Dalessandro * Get the next work request entry to find where to put the data. 162f48ad614SDennis Dalessandro */ 163f48ad614SDennis Dalessandro if (qp->r_flags & RVT_R_REUSE_SGE) { 164f48ad614SDennis Dalessandro qp->r_flags &= ~RVT_R_REUSE_SGE; 165f48ad614SDennis Dalessandro } else { 166f48ad614SDennis Dalessandro int ret; 167f48ad614SDennis Dalessandro 168f48ad614SDennis Dalessandro ret = hfi1_rvt_get_rwqe(qp, 0); 169f48ad614SDennis Dalessandro if (ret < 0) { 170f48ad614SDennis Dalessandro hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR); 171f48ad614SDennis Dalessandro goto bail_unlock; 172f48ad614SDennis Dalessandro } 173f48ad614SDennis Dalessandro if (!ret) { 174f48ad614SDennis Dalessandro if (qp->ibqp.qp_num == 0) 175f48ad614SDennis Dalessandro ibp->rvp.n_vl15_dropped++; 176f48ad614SDennis Dalessandro goto bail_unlock; 177f48ad614SDennis Dalessandro } 178f48ad614SDennis Dalessandro } 179f48ad614SDennis Dalessandro /* Silently drop packets which are too big. */ 180f48ad614SDennis Dalessandro if (unlikely(wc.byte_len > qp->r_len)) { 181f48ad614SDennis Dalessandro qp->r_flags |= RVT_R_REUSE_SGE; 182f48ad614SDennis Dalessandro ibp->rvp.n_pkt_drops++; 183f48ad614SDennis Dalessandro goto bail_unlock; 184f48ad614SDennis Dalessandro } 185f48ad614SDennis Dalessandro 186f48ad614SDennis Dalessandro if (ah_attr->ah_flags & IB_AH_GRH) { 187f48ad614SDennis Dalessandro hfi1_copy_sge(&qp->r_sge, &ah_attr->grh, 188f48ad614SDennis Dalessandro sizeof(struct ib_grh), 1, 0); 189f48ad614SDennis Dalessandro wc.wc_flags |= IB_WC_GRH; 190f48ad614SDennis Dalessandro } else { 191f48ad614SDennis Dalessandro hfi1_skip_sge(&qp->r_sge, sizeof(struct ib_grh), 1); 192f48ad614SDennis Dalessandro } 193f48ad614SDennis Dalessandro ssge.sg_list = swqe->sg_list + 1; 194f48ad614SDennis Dalessandro ssge.sge = *swqe->sg_list; 195f48ad614SDennis Dalessandro ssge.num_sge = swqe->wr.num_sge; 196f48ad614SDennis Dalessandro sge = &ssge.sge; 197f48ad614SDennis Dalessandro while (length) { 198f48ad614SDennis Dalessandro u32 len = sge->length; 199f48ad614SDennis Dalessandro 200f48ad614SDennis Dalessandro if (len > length) 201f48ad614SDennis Dalessandro len = length; 202f48ad614SDennis Dalessandro if (len > sge->sge_length) 203f48ad614SDennis Dalessandro len = sge->sge_length; 204f48ad614SDennis Dalessandro WARN_ON_ONCE(len == 0); 205f48ad614SDennis Dalessandro hfi1_copy_sge(&qp->r_sge, sge->vaddr, len, 1, 0); 206f48ad614SDennis Dalessandro sge->vaddr += len; 207f48ad614SDennis Dalessandro sge->length -= len; 208f48ad614SDennis Dalessandro sge->sge_length -= len; 209f48ad614SDennis Dalessandro if (sge->sge_length == 0) { 210f48ad614SDennis Dalessandro if (--ssge.num_sge) 211f48ad614SDennis Dalessandro *sge = *ssge.sg_list++; 212f48ad614SDennis Dalessandro } else if (sge->length == 0 && sge->mr->lkey) { 213f48ad614SDennis Dalessandro if (++sge->n >= RVT_SEGSZ) { 214f48ad614SDennis Dalessandro if (++sge->m >= sge->mr->mapsz) 215f48ad614SDennis Dalessandro break; 216f48ad614SDennis Dalessandro sge->n = 0; 217f48ad614SDennis Dalessandro } 218f48ad614SDennis Dalessandro sge->vaddr = 219f48ad614SDennis Dalessandro sge->mr->map[sge->m]->segs[sge->n].vaddr; 220f48ad614SDennis Dalessandro sge->length = 221f48ad614SDennis Dalessandro sge->mr->map[sge->m]->segs[sge->n].length; 222f48ad614SDennis Dalessandro } 223f48ad614SDennis Dalessandro length -= len; 224f48ad614SDennis Dalessandro } 225f48ad614SDennis Dalessandro rvt_put_ss(&qp->r_sge); 226f48ad614SDennis Dalessandro if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) 227f48ad614SDennis Dalessandro goto bail_unlock; 228f48ad614SDennis Dalessandro wc.wr_id = qp->r_wr_id; 229f48ad614SDennis Dalessandro wc.status = IB_WC_SUCCESS; 230f48ad614SDennis Dalessandro wc.opcode = IB_WC_RECV; 231f48ad614SDennis Dalessandro wc.qp = &qp->ibqp; 232f48ad614SDennis Dalessandro wc.src_qp = sqp->ibqp.qp_num; 233f48ad614SDennis Dalessandro if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_SMI) { 234f48ad614SDennis Dalessandro if (sqp->ibqp.qp_type == IB_QPT_GSI || 235f48ad614SDennis Dalessandro sqp->ibqp.qp_type == IB_QPT_SMI) 236f48ad614SDennis Dalessandro wc.pkey_index = swqe->ud_wr.pkey_index; 237f48ad614SDennis Dalessandro else 238f48ad614SDennis Dalessandro wc.pkey_index = sqp->s_pkey_index; 239f48ad614SDennis Dalessandro } else { 240f48ad614SDennis Dalessandro wc.pkey_index = 0; 241f48ad614SDennis Dalessandro } 242f48ad614SDennis Dalessandro wc.slid = ppd->lid | (ah_attr->src_path_bits & ((1 << ppd->lmc) - 1)); 243f48ad614SDennis Dalessandro /* Check for loopback when the port lid is not set */ 244f48ad614SDennis Dalessandro if (wc.slid == 0 && sqp->ibqp.qp_type == IB_QPT_GSI) 245f48ad614SDennis Dalessandro wc.slid = be16_to_cpu(IB_LID_PERMISSIVE); 246f48ad614SDennis Dalessandro wc.sl = ah_attr->sl; 247f48ad614SDennis Dalessandro wc.dlid_path_bits = ah_attr->dlid & ((1 << ppd->lmc) - 1); 248f48ad614SDennis Dalessandro wc.port_num = qp->port_num; 249f48ad614SDennis Dalessandro /* Signal completion event if the solicited bit is set. */ 250f48ad614SDennis Dalessandro rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 251f48ad614SDennis Dalessandro swqe->wr.send_flags & IB_SEND_SOLICITED); 252f48ad614SDennis Dalessandro ibp->rvp.n_loop_pkts++; 253f48ad614SDennis Dalessandro bail_unlock: 254f48ad614SDennis Dalessandro spin_unlock_irqrestore(&qp->r_lock, flags); 255f48ad614SDennis Dalessandro drop: 256f48ad614SDennis Dalessandro rcu_read_unlock(); 257f48ad614SDennis Dalessandro } 258f48ad614SDennis Dalessandro 259f48ad614SDennis Dalessandro /** 260f48ad614SDennis Dalessandro * hfi1_make_ud_req - construct a UD request packet 261f48ad614SDennis Dalessandro * @qp: the QP 262f48ad614SDennis Dalessandro * 263f48ad614SDennis Dalessandro * Assume s_lock is held. 264f48ad614SDennis Dalessandro * 265f48ad614SDennis Dalessandro * Return 1 if constructed; otherwise, return 0. 266f48ad614SDennis Dalessandro */ 267f48ad614SDennis Dalessandro int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps) 268f48ad614SDennis Dalessandro { 269f48ad614SDennis Dalessandro struct hfi1_qp_priv *priv = qp->priv; 270f48ad614SDennis Dalessandro struct hfi1_other_headers *ohdr; 271f48ad614SDennis Dalessandro struct ib_ah_attr *ah_attr; 272f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd; 273f48ad614SDennis Dalessandro struct hfi1_ibport *ibp; 274f48ad614SDennis Dalessandro struct rvt_swqe *wqe; 275f48ad614SDennis Dalessandro u32 nwords; 276f48ad614SDennis Dalessandro u32 extra_bytes; 277f48ad614SDennis Dalessandro u32 bth0; 278f48ad614SDennis Dalessandro u16 lrh0; 279f48ad614SDennis Dalessandro u16 lid; 280f48ad614SDennis Dalessandro int next_cur; 281f48ad614SDennis Dalessandro u8 sc5; 282f48ad614SDennis Dalessandro 283f48ad614SDennis Dalessandro ps->s_txreq = get_txreq(ps->dev, qp); 284f48ad614SDennis Dalessandro if (IS_ERR(ps->s_txreq)) 285f48ad614SDennis Dalessandro goto bail_no_tx; 286f48ad614SDennis Dalessandro 287f48ad614SDennis Dalessandro if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_NEXT_SEND_OK)) { 288f48ad614SDennis Dalessandro if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND)) 289f48ad614SDennis Dalessandro goto bail; 290f48ad614SDennis Dalessandro /* We are in the error state, flush the work request. */ 291f48ad614SDennis Dalessandro smp_read_barrier_depends(); /* see post_one_send */ 292f48ad614SDennis Dalessandro if (qp->s_last == ACCESS_ONCE(qp->s_head)) 293f48ad614SDennis Dalessandro goto bail; 294f48ad614SDennis Dalessandro /* If DMAs are in progress, we can't flush immediately. */ 295f48ad614SDennis Dalessandro if (iowait_sdma_pending(&priv->s_iowait)) { 296f48ad614SDennis Dalessandro qp->s_flags |= RVT_S_WAIT_DMA; 297f48ad614SDennis Dalessandro goto bail; 298f48ad614SDennis Dalessandro } 299f48ad614SDennis Dalessandro wqe = rvt_get_swqe_ptr(qp, qp->s_last); 300f48ad614SDennis Dalessandro hfi1_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); 301f48ad614SDennis Dalessandro goto done_free_tx; 302f48ad614SDennis Dalessandro } 303f48ad614SDennis Dalessandro 304f48ad614SDennis Dalessandro /* see post_one_send() */ 305f48ad614SDennis Dalessandro smp_read_barrier_depends(); 306f48ad614SDennis Dalessandro if (qp->s_cur == ACCESS_ONCE(qp->s_head)) 307f48ad614SDennis Dalessandro goto bail; 308f48ad614SDennis Dalessandro 309f48ad614SDennis Dalessandro wqe = rvt_get_swqe_ptr(qp, qp->s_cur); 310f48ad614SDennis Dalessandro next_cur = qp->s_cur + 1; 311f48ad614SDennis Dalessandro if (next_cur >= qp->s_size) 312f48ad614SDennis Dalessandro next_cur = 0; 313f48ad614SDennis Dalessandro 314f48ad614SDennis Dalessandro /* Construct the header. */ 315f48ad614SDennis Dalessandro ibp = to_iport(qp->ibqp.device, qp->port_num); 316f48ad614SDennis Dalessandro ppd = ppd_from_ibp(ibp); 317f48ad614SDennis Dalessandro ah_attr = &ibah_to_rvtah(wqe->ud_wr.ah)->attr; 318f48ad614SDennis Dalessandro if (ah_attr->dlid < be16_to_cpu(IB_MULTICAST_LID_BASE) || 319f48ad614SDennis Dalessandro ah_attr->dlid == be16_to_cpu(IB_LID_PERMISSIVE)) { 320f48ad614SDennis Dalessandro lid = ah_attr->dlid & ~((1 << ppd->lmc) - 1); 321f48ad614SDennis Dalessandro if (unlikely(!loopback && 322f48ad614SDennis Dalessandro (lid == ppd->lid || 323f48ad614SDennis Dalessandro (lid == be16_to_cpu(IB_LID_PERMISSIVE) && 324f48ad614SDennis Dalessandro qp->ibqp.qp_type == IB_QPT_GSI)))) { 325f48ad614SDennis Dalessandro unsigned long tflags = ps->flags; 326f48ad614SDennis Dalessandro /* 327f48ad614SDennis Dalessandro * If DMAs are in progress, we can't generate 328f48ad614SDennis Dalessandro * a completion for the loopback packet since 329f48ad614SDennis Dalessandro * it would be out of order. 330f48ad614SDennis Dalessandro * Instead of waiting, we could queue a 331f48ad614SDennis Dalessandro * zero length descriptor so we get a callback. 332f48ad614SDennis Dalessandro */ 333f48ad614SDennis Dalessandro if (iowait_sdma_pending(&priv->s_iowait)) { 334f48ad614SDennis Dalessandro qp->s_flags |= RVT_S_WAIT_DMA; 335f48ad614SDennis Dalessandro goto bail; 336f48ad614SDennis Dalessandro } 337f48ad614SDennis Dalessandro qp->s_cur = next_cur; 338f48ad614SDennis Dalessandro spin_unlock_irqrestore(&qp->s_lock, tflags); 339f48ad614SDennis Dalessandro ud_loopback(qp, wqe); 340f48ad614SDennis Dalessandro spin_lock_irqsave(&qp->s_lock, tflags); 341f48ad614SDennis Dalessandro ps->flags = tflags; 342f48ad614SDennis Dalessandro hfi1_send_complete(qp, wqe, IB_WC_SUCCESS); 343f48ad614SDennis Dalessandro goto done_free_tx; 344f48ad614SDennis Dalessandro } 345f48ad614SDennis Dalessandro } 346f48ad614SDennis Dalessandro 347f48ad614SDennis Dalessandro qp->s_cur = next_cur; 348f48ad614SDennis Dalessandro extra_bytes = -wqe->length & 3; 349f48ad614SDennis Dalessandro nwords = (wqe->length + extra_bytes) >> 2; 350f48ad614SDennis Dalessandro 351f48ad614SDennis Dalessandro /* header size in 32-bit words LRH+BTH+DETH = (8+12+8)/4. */ 352f48ad614SDennis Dalessandro qp->s_hdrwords = 7; 353f48ad614SDennis Dalessandro qp->s_cur_size = wqe->length; 354f48ad614SDennis Dalessandro qp->s_cur_sge = &qp->s_sge; 355f48ad614SDennis Dalessandro qp->s_srate = ah_attr->static_rate; 356f48ad614SDennis Dalessandro qp->srate_mbps = ib_rate_to_mbps(qp->s_srate); 357f48ad614SDennis Dalessandro qp->s_wqe = wqe; 358f48ad614SDennis Dalessandro qp->s_sge.sge = wqe->sg_list[0]; 359f48ad614SDennis Dalessandro qp->s_sge.sg_list = wqe->sg_list + 1; 360f48ad614SDennis Dalessandro qp->s_sge.num_sge = wqe->wr.num_sge; 361f48ad614SDennis Dalessandro qp->s_sge.total_len = wqe->length; 362f48ad614SDennis Dalessandro 363f48ad614SDennis Dalessandro if (ah_attr->ah_flags & IB_AH_GRH) { 364f48ad614SDennis Dalessandro /* Header size in 32-bit words. */ 365f48ad614SDennis Dalessandro qp->s_hdrwords += hfi1_make_grh(ibp, 366f48ad614SDennis Dalessandro &ps->s_txreq->phdr.hdr.u.l.grh, 367f48ad614SDennis Dalessandro &ah_attr->grh, 368f48ad614SDennis Dalessandro qp->s_hdrwords, nwords); 369f48ad614SDennis Dalessandro lrh0 = HFI1_LRH_GRH; 370f48ad614SDennis Dalessandro ohdr = &ps->s_txreq->phdr.hdr.u.l.oth; 371f48ad614SDennis Dalessandro /* 372f48ad614SDennis Dalessandro * Don't worry about sending to locally attached multicast 373f48ad614SDennis Dalessandro * QPs. It is unspecified by the spec. what happens. 374f48ad614SDennis Dalessandro */ 375f48ad614SDennis Dalessandro } else { 376f48ad614SDennis Dalessandro /* Header size in 32-bit words. */ 377f48ad614SDennis Dalessandro lrh0 = HFI1_LRH_BTH; 378f48ad614SDennis Dalessandro ohdr = &ps->s_txreq->phdr.hdr.u.oth; 379f48ad614SDennis Dalessandro } 380f48ad614SDennis Dalessandro if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) { 381f48ad614SDennis Dalessandro qp->s_hdrwords++; 382f48ad614SDennis Dalessandro ohdr->u.ud.imm_data = wqe->wr.ex.imm_data; 383f48ad614SDennis Dalessandro bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24; 384f48ad614SDennis Dalessandro } else { 385f48ad614SDennis Dalessandro bth0 = IB_OPCODE_UD_SEND_ONLY << 24; 386f48ad614SDennis Dalessandro } 387f48ad614SDennis Dalessandro sc5 = ibp->sl_to_sc[ah_attr->sl]; 388f48ad614SDennis Dalessandro lrh0 |= (ah_attr->sl & 0xf) << 4; 389f48ad614SDennis Dalessandro if (qp->ibqp.qp_type == IB_QPT_SMI) { 390f48ad614SDennis Dalessandro lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */ 391f48ad614SDennis Dalessandro priv->s_sc = 0xf; 392f48ad614SDennis Dalessandro } else { 393f48ad614SDennis Dalessandro lrh0 |= (sc5 & 0xf) << 12; 394f48ad614SDennis Dalessandro priv->s_sc = sc5; 395f48ad614SDennis Dalessandro } 396f48ad614SDennis Dalessandro priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); 397f48ad614SDennis Dalessandro ps->s_txreq->sde = priv->s_sde; 398f48ad614SDennis Dalessandro priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc); 399f48ad614SDennis Dalessandro ps->s_txreq->psc = priv->s_sendcontext; 400f48ad614SDennis Dalessandro ps->s_txreq->phdr.hdr.lrh[0] = cpu_to_be16(lrh0); 401f48ad614SDennis Dalessandro ps->s_txreq->phdr.hdr.lrh[1] = cpu_to_be16(ah_attr->dlid); 402f48ad614SDennis Dalessandro ps->s_txreq->phdr.hdr.lrh[2] = 403f48ad614SDennis Dalessandro cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC); 404f48ad614SDennis Dalessandro if (ah_attr->dlid == be16_to_cpu(IB_LID_PERMISSIVE)) { 405f48ad614SDennis Dalessandro ps->s_txreq->phdr.hdr.lrh[3] = IB_LID_PERMISSIVE; 406f48ad614SDennis Dalessandro } else { 407f48ad614SDennis Dalessandro lid = ppd->lid; 408f48ad614SDennis Dalessandro if (lid) { 409f48ad614SDennis Dalessandro lid |= ah_attr->src_path_bits & ((1 << ppd->lmc) - 1); 410f48ad614SDennis Dalessandro ps->s_txreq->phdr.hdr.lrh[3] = cpu_to_be16(lid); 411f48ad614SDennis Dalessandro } else { 412f48ad614SDennis Dalessandro ps->s_txreq->phdr.hdr.lrh[3] = IB_LID_PERMISSIVE; 413f48ad614SDennis Dalessandro } 414f48ad614SDennis Dalessandro } 415f48ad614SDennis Dalessandro if (wqe->wr.send_flags & IB_SEND_SOLICITED) 416f48ad614SDennis Dalessandro bth0 |= IB_BTH_SOLICITED; 417f48ad614SDennis Dalessandro bth0 |= extra_bytes << 20; 418f48ad614SDennis Dalessandro if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_SMI) 419f48ad614SDennis Dalessandro bth0 |= hfi1_get_pkey(ibp, wqe->ud_wr.pkey_index); 420f48ad614SDennis Dalessandro else 421f48ad614SDennis Dalessandro bth0 |= hfi1_get_pkey(ibp, qp->s_pkey_index); 422f48ad614SDennis Dalessandro ohdr->bth[0] = cpu_to_be32(bth0); 423f48ad614SDennis Dalessandro ohdr->bth[1] = cpu_to_be32(wqe->ud_wr.remote_qpn); 424f48ad614SDennis Dalessandro ohdr->bth[2] = cpu_to_be32(mask_psn(wqe->psn)); 425f48ad614SDennis Dalessandro /* 426f48ad614SDennis Dalessandro * Qkeys with the high order bit set mean use the 427f48ad614SDennis Dalessandro * qkey from the QP context instead of the WR (see 10.2.5). 428f48ad614SDennis Dalessandro */ 429f48ad614SDennis Dalessandro ohdr->u.ud.deth[0] = cpu_to_be32((int)wqe->ud_wr.remote_qkey < 0 ? 430f48ad614SDennis Dalessandro qp->qkey : wqe->ud_wr.remote_qkey); 431f48ad614SDennis Dalessandro ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num); 432f48ad614SDennis Dalessandro /* disarm any ahg */ 433f48ad614SDennis Dalessandro priv->s_hdr->ahgcount = 0; 434f48ad614SDennis Dalessandro priv->s_hdr->ahgidx = 0; 435f48ad614SDennis Dalessandro priv->s_hdr->tx_flags = 0; 436f48ad614SDennis Dalessandro priv->s_hdr->sde = NULL; 437f48ad614SDennis Dalessandro /* pbc */ 438f48ad614SDennis Dalessandro ps->s_txreq->hdr_dwords = qp->s_hdrwords + 2; 439f48ad614SDennis Dalessandro 440f48ad614SDennis Dalessandro return 1; 441f48ad614SDennis Dalessandro 442f48ad614SDennis Dalessandro done_free_tx: 443f48ad614SDennis Dalessandro hfi1_put_txreq(ps->s_txreq); 444f48ad614SDennis Dalessandro ps->s_txreq = NULL; 445f48ad614SDennis Dalessandro return 1; 446f48ad614SDennis Dalessandro 447f48ad614SDennis Dalessandro bail: 448f48ad614SDennis Dalessandro hfi1_put_txreq(ps->s_txreq); 449f48ad614SDennis Dalessandro 450f48ad614SDennis Dalessandro bail_no_tx: 451f48ad614SDennis Dalessandro ps->s_txreq = NULL; 452f48ad614SDennis Dalessandro qp->s_flags &= ~RVT_S_BUSY; 453f48ad614SDennis Dalessandro qp->s_hdrwords = 0; 454f48ad614SDennis Dalessandro return 0; 455f48ad614SDennis Dalessandro } 456f48ad614SDennis Dalessandro 457f48ad614SDennis Dalessandro /* 458f48ad614SDennis Dalessandro * Hardware can't check this so we do it here. 459f48ad614SDennis Dalessandro * 460f48ad614SDennis Dalessandro * This is a slightly different algorithm than the standard pkey check. It 461f48ad614SDennis Dalessandro * special cases the management keys and allows for 0x7fff and 0xffff to be in 462f48ad614SDennis Dalessandro * the table at the same time. 463f48ad614SDennis Dalessandro * 464f48ad614SDennis Dalessandro * @returns the index found or -1 if not found 465f48ad614SDennis Dalessandro */ 466f48ad614SDennis Dalessandro int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey) 467f48ad614SDennis Dalessandro { 468f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); 469f48ad614SDennis Dalessandro unsigned i; 470f48ad614SDennis Dalessandro 471f48ad614SDennis Dalessandro if (pkey == FULL_MGMT_P_KEY || pkey == LIM_MGMT_P_KEY) { 472f48ad614SDennis Dalessandro unsigned lim_idx = -1; 473f48ad614SDennis Dalessandro 474f48ad614SDennis Dalessandro for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i) { 475f48ad614SDennis Dalessandro /* here we look for an exact match */ 476f48ad614SDennis Dalessandro if (ppd->pkeys[i] == pkey) 477f48ad614SDennis Dalessandro return i; 478f48ad614SDennis Dalessandro if (ppd->pkeys[i] == LIM_MGMT_P_KEY) 479f48ad614SDennis Dalessandro lim_idx = i; 480f48ad614SDennis Dalessandro } 481f48ad614SDennis Dalessandro 482f48ad614SDennis Dalessandro /* did not find 0xffff return 0x7fff idx if found */ 483f48ad614SDennis Dalessandro if (pkey == FULL_MGMT_P_KEY) 484f48ad614SDennis Dalessandro return lim_idx; 485f48ad614SDennis Dalessandro 486f48ad614SDennis Dalessandro /* no match... */ 487f48ad614SDennis Dalessandro return -1; 488f48ad614SDennis Dalessandro } 489f48ad614SDennis Dalessandro 490f48ad614SDennis Dalessandro pkey &= 0x7fff; /* remove limited/full membership bit */ 491f48ad614SDennis Dalessandro 492f48ad614SDennis Dalessandro for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i) 493f48ad614SDennis Dalessandro if ((ppd->pkeys[i] & 0x7fff) == pkey) 494f48ad614SDennis Dalessandro return i; 495f48ad614SDennis Dalessandro 496f48ad614SDennis Dalessandro /* 497f48ad614SDennis Dalessandro * Should not get here, this means hardware failed to validate pkeys. 498f48ad614SDennis Dalessandro */ 499f48ad614SDennis Dalessandro return -1; 500f48ad614SDennis Dalessandro } 501f48ad614SDennis Dalessandro 502f48ad614SDennis Dalessandro void return_cnp(struct hfi1_ibport *ibp, struct rvt_qp *qp, u32 remote_qpn, 503f48ad614SDennis Dalessandro u32 pkey, u32 slid, u32 dlid, u8 sc5, 504f48ad614SDennis Dalessandro const struct ib_grh *old_grh) 505f48ad614SDennis Dalessandro { 506f48ad614SDennis Dalessandro u64 pbc, pbc_flags = 0; 507f48ad614SDennis Dalessandro u32 bth0, plen, vl, hwords = 5; 508f48ad614SDennis Dalessandro u16 lrh0; 509f48ad614SDennis Dalessandro u8 sl = ibp->sc_to_sl[sc5]; 510f48ad614SDennis Dalessandro struct hfi1_ib_header hdr; 511f48ad614SDennis Dalessandro struct hfi1_other_headers *ohdr; 512f48ad614SDennis Dalessandro struct pio_buf *pbuf; 513f48ad614SDennis Dalessandro struct send_context *ctxt = qp_to_send_context(qp, sc5); 514f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); 515f48ad614SDennis Dalessandro 516f48ad614SDennis Dalessandro if (old_grh) { 517f48ad614SDennis Dalessandro struct ib_grh *grh = &hdr.u.l.grh; 518f48ad614SDennis Dalessandro 519f48ad614SDennis Dalessandro grh->version_tclass_flow = old_grh->version_tclass_flow; 520f48ad614SDennis Dalessandro grh->paylen = cpu_to_be16((hwords - 2 + SIZE_OF_CRC) << 2); 521f48ad614SDennis Dalessandro grh->hop_limit = 0xff; 522f48ad614SDennis Dalessandro grh->sgid = old_grh->dgid; 523f48ad614SDennis Dalessandro grh->dgid = old_grh->sgid; 524f48ad614SDennis Dalessandro ohdr = &hdr.u.l.oth; 525f48ad614SDennis Dalessandro lrh0 = HFI1_LRH_GRH; 526f48ad614SDennis Dalessandro hwords += sizeof(struct ib_grh) / sizeof(u32); 527f48ad614SDennis Dalessandro } else { 528f48ad614SDennis Dalessandro ohdr = &hdr.u.oth; 529f48ad614SDennis Dalessandro lrh0 = HFI1_LRH_BTH; 530f48ad614SDennis Dalessandro } 531f48ad614SDennis Dalessandro 532f48ad614SDennis Dalessandro lrh0 |= (sc5 & 0xf) << 12 | sl << 4; 533f48ad614SDennis Dalessandro 534f48ad614SDennis Dalessandro bth0 = pkey | (IB_OPCODE_CNP << 24); 535f48ad614SDennis Dalessandro ohdr->bth[0] = cpu_to_be32(bth0); 536f48ad614SDennis Dalessandro 537f48ad614SDennis Dalessandro ohdr->bth[1] = cpu_to_be32(remote_qpn | (1 << HFI1_BECN_SHIFT)); 538f48ad614SDennis Dalessandro ohdr->bth[2] = 0; /* PSN 0 */ 539f48ad614SDennis Dalessandro 540f48ad614SDennis Dalessandro hdr.lrh[0] = cpu_to_be16(lrh0); 541f48ad614SDennis Dalessandro hdr.lrh[1] = cpu_to_be16(dlid); 542f48ad614SDennis Dalessandro hdr.lrh[2] = cpu_to_be16(hwords + SIZE_OF_CRC); 543f48ad614SDennis Dalessandro hdr.lrh[3] = cpu_to_be16(slid); 544f48ad614SDennis Dalessandro 545f48ad614SDennis Dalessandro plen = 2 /* PBC */ + hwords; 546f48ad614SDennis Dalessandro pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT; 547f48ad614SDennis Dalessandro vl = sc_to_vlt(ppd->dd, sc5); 548f48ad614SDennis Dalessandro pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen); 549f48ad614SDennis Dalessandro if (ctxt) { 550f48ad614SDennis Dalessandro pbuf = sc_buffer_alloc(ctxt, plen, NULL, NULL); 551f48ad614SDennis Dalessandro if (pbuf) 552f48ad614SDennis Dalessandro ppd->dd->pio_inline_send(ppd->dd, pbuf, pbc, 553f48ad614SDennis Dalessandro &hdr, hwords); 554f48ad614SDennis Dalessandro } 555f48ad614SDennis Dalessandro } 556f48ad614SDennis Dalessandro 557f48ad614SDennis Dalessandro /* 558f48ad614SDennis Dalessandro * opa_smp_check() - Do the regular pkey checking, and the additional 559f48ad614SDennis Dalessandro * checks for SMPs specified in OPAv1 rev 0.90, section 9.10.26 560f48ad614SDennis Dalessandro * ("SMA Packet Checks"). 561f48ad614SDennis Dalessandro * 562f48ad614SDennis Dalessandro * Note that: 563f48ad614SDennis Dalessandro * - Checks are done using the pkey directly from the packet's BTH, 564f48ad614SDennis Dalessandro * and specifically _not_ the pkey that we attach to the completion, 565f48ad614SDennis Dalessandro * which may be different. 566f48ad614SDennis Dalessandro * - These checks are specifically for "non-local" SMPs (i.e., SMPs 567f48ad614SDennis Dalessandro * which originated on another node). SMPs which are sent from, and 568f48ad614SDennis Dalessandro * destined to this node are checked in opa_local_smp_check(). 569f48ad614SDennis Dalessandro * 570f48ad614SDennis Dalessandro * At the point where opa_smp_check() is called, we know: 571f48ad614SDennis Dalessandro * - destination QP is QP0 572f48ad614SDennis Dalessandro * 573f48ad614SDennis Dalessandro * opa_smp_check() returns 0 if all checks succeed, 1 otherwise. 574f48ad614SDennis Dalessandro */ 575f48ad614SDennis Dalessandro static int opa_smp_check(struct hfi1_ibport *ibp, u16 pkey, u8 sc5, 576f48ad614SDennis Dalessandro struct rvt_qp *qp, u16 slid, struct opa_smp *smp) 577f48ad614SDennis Dalessandro { 578f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); 579f48ad614SDennis Dalessandro 580f48ad614SDennis Dalessandro /* 581f48ad614SDennis Dalessandro * I don't think it's possible for us to get here with sc != 0xf, 582f48ad614SDennis Dalessandro * but check it to be certain. 583f48ad614SDennis Dalessandro */ 584f48ad614SDennis Dalessandro if (sc5 != 0xf) 585f48ad614SDennis Dalessandro return 1; 586f48ad614SDennis Dalessandro 587f48ad614SDennis Dalessandro if (rcv_pkey_check(ppd, pkey, sc5, slid)) 588f48ad614SDennis Dalessandro return 1; 589f48ad614SDennis Dalessandro 590f48ad614SDennis Dalessandro /* 591f48ad614SDennis Dalessandro * At this point we know (and so don't need to check again) that 592f48ad614SDennis Dalessandro * the pkey is either LIM_MGMT_P_KEY, or FULL_MGMT_P_KEY 593f48ad614SDennis Dalessandro * (see ingress_pkey_check). 594f48ad614SDennis Dalessandro */ 595f48ad614SDennis Dalessandro if (smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE && 596f48ad614SDennis Dalessandro smp->mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED) { 597f48ad614SDennis Dalessandro ingress_pkey_table_fail(ppd, pkey, slid); 598f48ad614SDennis Dalessandro return 1; 599f48ad614SDennis Dalessandro } 600f48ad614SDennis Dalessandro 601f48ad614SDennis Dalessandro /* 602f48ad614SDennis Dalessandro * SMPs fall into one of four (disjoint) categories: 603f48ad614SDennis Dalessandro * SMA request, SMA response, trap, or trap repress. 604f48ad614SDennis Dalessandro * Our response depends, in part, on which type of 605f48ad614SDennis Dalessandro * SMP we're processing. 606f48ad614SDennis Dalessandro * 607f48ad614SDennis Dalessandro * If this is not an SMA request, or trap repress: 608f48ad614SDennis Dalessandro * - accept MAD if the port is running an SM 609f48ad614SDennis Dalessandro * - pkey == FULL_MGMT_P_KEY => 610f48ad614SDennis Dalessandro * reply with unsupported method (i.e., just mark 611f48ad614SDennis Dalessandro * the smp's status field here, and let it be 612f48ad614SDennis Dalessandro * processed normally) 613f48ad614SDennis Dalessandro * - pkey != LIM_MGMT_P_KEY => 614f48ad614SDennis Dalessandro * increment port recv constraint errors, drop MAD 615f48ad614SDennis Dalessandro * If this is an SMA request or trap repress: 616f48ad614SDennis Dalessandro * - pkey != FULL_MGMT_P_KEY => 617f48ad614SDennis Dalessandro * increment port recv constraint errors, drop MAD 618f48ad614SDennis Dalessandro */ 619f48ad614SDennis Dalessandro switch (smp->method) { 620f48ad614SDennis Dalessandro case IB_MGMT_METHOD_GET: 621f48ad614SDennis Dalessandro case IB_MGMT_METHOD_SET: 622f48ad614SDennis Dalessandro case IB_MGMT_METHOD_REPORT: 623f48ad614SDennis Dalessandro case IB_MGMT_METHOD_TRAP_REPRESS: 624f48ad614SDennis Dalessandro if (pkey != FULL_MGMT_P_KEY) { 625f48ad614SDennis Dalessandro ingress_pkey_table_fail(ppd, pkey, slid); 626f48ad614SDennis Dalessandro return 1; 627f48ad614SDennis Dalessandro } 628f48ad614SDennis Dalessandro break; 629f48ad614SDennis Dalessandro case IB_MGMT_METHOD_SEND: 630f48ad614SDennis Dalessandro case IB_MGMT_METHOD_TRAP: 631f48ad614SDennis Dalessandro case IB_MGMT_METHOD_GET_RESP: 632f48ad614SDennis Dalessandro case IB_MGMT_METHOD_REPORT_RESP: 633f48ad614SDennis Dalessandro if (ibp->rvp.port_cap_flags & IB_PORT_SM) 634f48ad614SDennis Dalessandro return 0; 635f48ad614SDennis Dalessandro if (pkey == FULL_MGMT_P_KEY) { 636f48ad614SDennis Dalessandro smp->status |= IB_SMP_UNSUP_METHOD; 637f48ad614SDennis Dalessandro return 0; 638f48ad614SDennis Dalessandro } 639f48ad614SDennis Dalessandro if (pkey != LIM_MGMT_P_KEY) { 640f48ad614SDennis Dalessandro ingress_pkey_table_fail(ppd, pkey, slid); 641f48ad614SDennis Dalessandro return 1; 642f48ad614SDennis Dalessandro } 643f48ad614SDennis Dalessandro break; 644f48ad614SDennis Dalessandro default: 645f48ad614SDennis Dalessandro break; 646f48ad614SDennis Dalessandro } 647f48ad614SDennis Dalessandro return 0; 648f48ad614SDennis Dalessandro } 649f48ad614SDennis Dalessandro 650f48ad614SDennis Dalessandro /** 651f48ad614SDennis Dalessandro * hfi1_ud_rcv - receive an incoming UD packet 652f48ad614SDennis Dalessandro * @ibp: the port the packet came in on 653f48ad614SDennis Dalessandro * @hdr: the packet header 654f48ad614SDennis Dalessandro * @rcv_flags: flags relevant to rcv processing 655f48ad614SDennis Dalessandro * @data: the packet data 656f48ad614SDennis Dalessandro * @tlen: the packet length 657f48ad614SDennis Dalessandro * @qp: the QP the packet came on 658f48ad614SDennis Dalessandro * 659f48ad614SDennis Dalessandro * This is called from qp_rcv() to process an incoming UD packet 660f48ad614SDennis Dalessandro * for the given QP. 661f48ad614SDennis Dalessandro * Called at interrupt level. 662f48ad614SDennis Dalessandro */ 663f48ad614SDennis Dalessandro void hfi1_ud_rcv(struct hfi1_packet *packet) 664f48ad614SDennis Dalessandro { 665f48ad614SDennis Dalessandro struct hfi1_other_headers *ohdr = packet->ohdr; 666f48ad614SDennis Dalessandro int opcode; 667f48ad614SDennis Dalessandro u32 hdrsize = packet->hlen; 668f48ad614SDennis Dalessandro u32 pad; 669f48ad614SDennis Dalessandro struct ib_wc wc; 670f48ad614SDennis Dalessandro u32 qkey; 671f48ad614SDennis Dalessandro u32 src_qp; 672f48ad614SDennis Dalessandro u16 dlid, pkey; 673f48ad614SDennis Dalessandro int mgmt_pkey_idx = -1; 674f48ad614SDennis Dalessandro struct hfi1_ibport *ibp = &packet->rcd->ppd->ibport_data; 675f48ad614SDennis Dalessandro struct hfi1_ib_header *hdr = packet->hdr; 676f48ad614SDennis Dalessandro u32 rcv_flags = packet->rcv_flags; 677f48ad614SDennis Dalessandro void *data = packet->ebuf; 678f48ad614SDennis Dalessandro u32 tlen = packet->tlen; 679f48ad614SDennis Dalessandro struct rvt_qp *qp = packet->qp; 680f48ad614SDennis Dalessandro bool has_grh = rcv_flags & HFI1_HAS_GRH; 681896ce45dSMike Marciniszyn u8 sc5 = hdr2sc((struct hfi1_message_header *)hdr, packet->rhf); 682f48ad614SDennis Dalessandro 683f48ad614SDennis Dalessandro qkey = be32_to_cpu(ohdr->u.ud.deth[0]); 684f48ad614SDennis Dalessandro src_qp = be32_to_cpu(ohdr->u.ud.deth[1]) & RVT_QPN_MASK; 685f48ad614SDennis Dalessandro dlid = be16_to_cpu(hdr->lrh[1]); 686f48ad614SDennis Dalessandro 687f48ad614SDennis Dalessandro /* 688f48ad614SDennis Dalessandro * The opcode is in the low byte when its in network order 689f48ad614SDennis Dalessandro * (top byte when in host order). 690f48ad614SDennis Dalessandro */ 691f48ad614SDennis Dalessandro opcode = be32_to_cpu(ohdr->bth[0]) >> 24; 692f48ad614SDennis Dalessandro opcode &= 0xff; 693f48ad614SDennis Dalessandro 694f48ad614SDennis Dalessandro pkey = (u16)be32_to_cpu(ohdr->bth[0]); 695f48ad614SDennis Dalessandro 6965fd2b562SMitko Haralanov process_ecn(qp, packet, (opcode != IB_OPCODE_CNP)); 697f48ad614SDennis Dalessandro 698f48ad614SDennis Dalessandro /* 699f48ad614SDennis Dalessandro * Get the number of bytes the message was padded by 700f48ad614SDennis Dalessandro * and drop incomplete packets. 701f48ad614SDennis Dalessandro */ 702f48ad614SDennis Dalessandro pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; 703f48ad614SDennis Dalessandro if (unlikely(tlen < (hdrsize + pad + 4))) 704f48ad614SDennis Dalessandro goto drop; 705f48ad614SDennis Dalessandro 706f48ad614SDennis Dalessandro tlen -= hdrsize + pad + 4; 707f48ad614SDennis Dalessandro 708f48ad614SDennis Dalessandro /* 709f48ad614SDennis Dalessandro * Check that the permissive LID is only used on QP0 710f48ad614SDennis Dalessandro * and the QKEY matches (see 9.6.1.4.1 and 9.6.1.5.1). 711f48ad614SDennis Dalessandro */ 712f48ad614SDennis Dalessandro if (qp->ibqp.qp_num) { 713f48ad614SDennis Dalessandro if (unlikely(hdr->lrh[1] == IB_LID_PERMISSIVE || 714f48ad614SDennis Dalessandro hdr->lrh[3] == IB_LID_PERMISSIVE)) 715f48ad614SDennis Dalessandro goto drop; 716f48ad614SDennis Dalessandro if (qp->ibqp.qp_num > 1) { 717f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); 718f48ad614SDennis Dalessandro u16 slid; 719f48ad614SDennis Dalessandro 720f48ad614SDennis Dalessandro slid = be16_to_cpu(hdr->lrh[3]); 721f48ad614SDennis Dalessandro if (unlikely(rcv_pkey_check(ppd, pkey, sc5, slid))) { 722f48ad614SDennis Dalessandro /* 723f48ad614SDennis Dalessandro * Traps will not be sent for packets dropped 724f48ad614SDennis Dalessandro * by the HW. This is fine, as sending trap 725f48ad614SDennis Dalessandro * for invalid pkeys is optional according to 726f48ad614SDennis Dalessandro * IB spec (release 1.3, section 10.9.4) 727f48ad614SDennis Dalessandro */ 728f48ad614SDennis Dalessandro hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_P_KEY, 729f48ad614SDennis Dalessandro pkey, 730f48ad614SDennis Dalessandro (be16_to_cpu(hdr->lrh[0]) >> 4) & 731f48ad614SDennis Dalessandro 0xF, 732f48ad614SDennis Dalessandro src_qp, qp->ibqp.qp_num, 733f48ad614SDennis Dalessandro be16_to_cpu(hdr->lrh[3]), 734f48ad614SDennis Dalessandro be16_to_cpu(hdr->lrh[1])); 735f48ad614SDennis Dalessandro return; 736f48ad614SDennis Dalessandro } 737f48ad614SDennis Dalessandro } else { 738f48ad614SDennis Dalessandro /* GSI packet */ 739f48ad614SDennis Dalessandro mgmt_pkey_idx = hfi1_lookup_pkey_idx(ibp, pkey); 740f48ad614SDennis Dalessandro if (mgmt_pkey_idx < 0) 741f48ad614SDennis Dalessandro goto drop; 742f48ad614SDennis Dalessandro } 743f48ad614SDennis Dalessandro if (unlikely(qkey != qp->qkey)) { 744f48ad614SDennis Dalessandro hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_Q_KEY, qkey, 745f48ad614SDennis Dalessandro (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF, 746f48ad614SDennis Dalessandro src_qp, qp->ibqp.qp_num, 747f48ad614SDennis Dalessandro be16_to_cpu(hdr->lrh[3]), 748f48ad614SDennis Dalessandro be16_to_cpu(hdr->lrh[1])); 749f48ad614SDennis Dalessandro return; 750f48ad614SDennis Dalessandro } 751f48ad614SDennis Dalessandro /* Drop invalid MAD packets (see 13.5.3.1). */ 752f48ad614SDennis Dalessandro if (unlikely(qp->ibqp.qp_num == 1 && 753f48ad614SDennis Dalessandro (tlen > 2048 || 754f48ad614SDennis Dalessandro (be16_to_cpu(hdr->lrh[0]) >> 12) == 15))) 755f48ad614SDennis Dalessandro goto drop; 756f48ad614SDennis Dalessandro } else { 757f48ad614SDennis Dalessandro /* Received on QP0, and so by definition, this is an SMP */ 758f48ad614SDennis Dalessandro struct opa_smp *smp = (struct opa_smp *)data; 759f48ad614SDennis Dalessandro u16 slid = be16_to_cpu(hdr->lrh[3]); 760f48ad614SDennis Dalessandro 761f48ad614SDennis Dalessandro if (opa_smp_check(ibp, pkey, sc5, qp, slid, smp)) 762f48ad614SDennis Dalessandro goto drop; 763f48ad614SDennis Dalessandro 764f48ad614SDennis Dalessandro if (tlen > 2048) 765f48ad614SDennis Dalessandro goto drop; 766f48ad614SDennis Dalessandro if ((hdr->lrh[1] == IB_LID_PERMISSIVE || 767f48ad614SDennis Dalessandro hdr->lrh[3] == IB_LID_PERMISSIVE) && 768f48ad614SDennis Dalessandro smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 769f48ad614SDennis Dalessandro goto drop; 770f48ad614SDennis Dalessandro 771f48ad614SDennis Dalessandro /* look up SMI pkey */ 772f48ad614SDennis Dalessandro mgmt_pkey_idx = hfi1_lookup_pkey_idx(ibp, pkey); 773f48ad614SDennis Dalessandro if (mgmt_pkey_idx < 0) 774f48ad614SDennis Dalessandro goto drop; 775f48ad614SDennis Dalessandro } 776f48ad614SDennis Dalessandro 777f48ad614SDennis Dalessandro if (qp->ibqp.qp_num > 1 && 778f48ad614SDennis Dalessandro opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) { 779f48ad614SDennis Dalessandro wc.ex.imm_data = ohdr->u.ud.imm_data; 780f48ad614SDennis Dalessandro wc.wc_flags = IB_WC_WITH_IMM; 781f48ad614SDennis Dalessandro tlen -= sizeof(u32); 782f48ad614SDennis Dalessandro } else if (opcode == IB_OPCODE_UD_SEND_ONLY) { 783f48ad614SDennis Dalessandro wc.ex.imm_data = 0; 784f48ad614SDennis Dalessandro wc.wc_flags = 0; 785f48ad614SDennis Dalessandro } else { 786f48ad614SDennis Dalessandro goto drop; 787f48ad614SDennis Dalessandro } 788f48ad614SDennis Dalessandro 789f48ad614SDennis Dalessandro /* 790f48ad614SDennis Dalessandro * A GRH is expected to precede the data even if not 791f48ad614SDennis Dalessandro * present on the wire. 792f48ad614SDennis Dalessandro */ 793f48ad614SDennis Dalessandro wc.byte_len = tlen + sizeof(struct ib_grh); 794f48ad614SDennis Dalessandro 795f48ad614SDennis Dalessandro /* 796f48ad614SDennis Dalessandro * Get the next work request entry to find where to put the data. 797f48ad614SDennis Dalessandro */ 798f48ad614SDennis Dalessandro if (qp->r_flags & RVT_R_REUSE_SGE) { 799f48ad614SDennis Dalessandro qp->r_flags &= ~RVT_R_REUSE_SGE; 800f48ad614SDennis Dalessandro } else { 801f48ad614SDennis Dalessandro int ret; 802f48ad614SDennis Dalessandro 803f48ad614SDennis Dalessandro ret = hfi1_rvt_get_rwqe(qp, 0); 804f48ad614SDennis Dalessandro if (ret < 0) { 805f48ad614SDennis Dalessandro hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR); 806f48ad614SDennis Dalessandro return; 807f48ad614SDennis Dalessandro } 808f48ad614SDennis Dalessandro if (!ret) { 809f48ad614SDennis Dalessandro if (qp->ibqp.qp_num == 0) 810f48ad614SDennis Dalessandro ibp->rvp.n_vl15_dropped++; 811f48ad614SDennis Dalessandro return; 812f48ad614SDennis Dalessandro } 813f48ad614SDennis Dalessandro } 814f48ad614SDennis Dalessandro /* Silently drop packets which are too big. */ 815f48ad614SDennis Dalessandro if (unlikely(wc.byte_len > qp->r_len)) { 816f48ad614SDennis Dalessandro qp->r_flags |= RVT_R_REUSE_SGE; 817f48ad614SDennis Dalessandro goto drop; 818f48ad614SDennis Dalessandro } 819f48ad614SDennis Dalessandro if (has_grh) { 820f48ad614SDennis Dalessandro hfi1_copy_sge(&qp->r_sge, &hdr->u.l.grh, 821f48ad614SDennis Dalessandro sizeof(struct ib_grh), 1, 0); 822f48ad614SDennis Dalessandro wc.wc_flags |= IB_WC_GRH; 823f48ad614SDennis Dalessandro } else { 824f48ad614SDennis Dalessandro hfi1_skip_sge(&qp->r_sge, sizeof(struct ib_grh), 1); 825f48ad614SDennis Dalessandro } 826f48ad614SDennis Dalessandro hfi1_copy_sge(&qp->r_sge, data, wc.byte_len - sizeof(struct ib_grh), 827f48ad614SDennis Dalessandro 1, 0); 828f48ad614SDennis Dalessandro rvt_put_ss(&qp->r_sge); 829f48ad614SDennis Dalessandro if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) 830f48ad614SDennis Dalessandro return; 831f48ad614SDennis Dalessandro wc.wr_id = qp->r_wr_id; 832f48ad614SDennis Dalessandro wc.status = IB_WC_SUCCESS; 833f48ad614SDennis Dalessandro wc.opcode = IB_WC_RECV; 834f48ad614SDennis Dalessandro wc.vendor_err = 0; 835f48ad614SDennis Dalessandro wc.qp = &qp->ibqp; 836f48ad614SDennis Dalessandro wc.src_qp = src_qp; 837f48ad614SDennis Dalessandro 838f48ad614SDennis Dalessandro if (qp->ibqp.qp_type == IB_QPT_GSI || 839f48ad614SDennis Dalessandro qp->ibqp.qp_type == IB_QPT_SMI) { 840f48ad614SDennis Dalessandro if (mgmt_pkey_idx < 0) { 841f48ad614SDennis Dalessandro if (net_ratelimit()) { 842f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); 843f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 844f48ad614SDennis Dalessandro 845f48ad614SDennis Dalessandro dd_dev_err(dd, "QP type %d mgmt_pkey_idx < 0 and packet not dropped???\n", 846f48ad614SDennis Dalessandro qp->ibqp.qp_type); 847f48ad614SDennis Dalessandro mgmt_pkey_idx = 0; 848f48ad614SDennis Dalessandro } 849f48ad614SDennis Dalessandro } 850f48ad614SDennis Dalessandro wc.pkey_index = (unsigned)mgmt_pkey_idx; 851f48ad614SDennis Dalessandro } else { 852f48ad614SDennis Dalessandro wc.pkey_index = 0; 853f48ad614SDennis Dalessandro } 854f48ad614SDennis Dalessandro 855f48ad614SDennis Dalessandro wc.slid = be16_to_cpu(hdr->lrh[3]); 856896ce45dSMike Marciniszyn wc.sl = ibp->sc_to_sl[sc5]; 857f48ad614SDennis Dalessandro 858f48ad614SDennis Dalessandro /* 859f48ad614SDennis Dalessandro * Save the LMC lower bits if the destination LID is a unicast LID. 860f48ad614SDennis Dalessandro */ 861f48ad614SDennis Dalessandro wc.dlid_path_bits = dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE) ? 0 : 862f48ad614SDennis Dalessandro dlid & ((1 << ppd_from_ibp(ibp)->lmc) - 1); 863f48ad614SDennis Dalessandro wc.port_num = qp->port_num; 864f48ad614SDennis Dalessandro /* Signal completion event if the solicited bit is set. */ 865f48ad614SDennis Dalessandro rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 866f48ad614SDennis Dalessandro (ohdr->bth[0] & 867f48ad614SDennis Dalessandro cpu_to_be32(IB_BTH_SOLICITED)) != 0); 868f48ad614SDennis Dalessandro return; 869f48ad614SDennis Dalessandro 870f48ad614SDennis Dalessandro drop: 871f48ad614SDennis Dalessandro ibp->rvp.n_pkt_drops++; 872f48ad614SDennis Dalessandro } 873