diff options
Diffstat (limited to 'drivers/staging/rdma/hfi1/ud.c')
| -rw-r--r-- | drivers/staging/rdma/hfi1/ud.c | 911 |
1 files changed, 0 insertions, 911 deletions
diff --git a/drivers/staging/rdma/hfi1/ud.c b/drivers/staging/rdma/hfi1/ud.c deleted file mode 100644 index 1e503ad0bebb..000000000000 --- a/drivers/staging/rdma/hfi1/ud.c +++ /dev/null @@ -1,911 +0,0 @@ -/* - * Copyright(c) 2015, 2016 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 <linux/net.h> -#include <rdma/ib_smi.h> - -#include "hfi.h" -#include "mad.h" -#include "verbs_txreq.h" -#include "qp.h" - -/** - * ud_loopback - handle send on loopback QPs - * @sqp: the sending QP - * @swqe: the send work request - * - * This is called from hfi1_make_ud_req() to forward a WQE addressed - * to the same HFI. - * Note that the receive interrupt handler may be calling hfi1_ud_rcv() - * while this is being called. - */ -static void ud_loopback(struct rvt_qp *sqp, struct rvt_swqe *swqe) -{ - struct hfi1_ibport *ibp = to_iport(sqp->ibqp.device, sqp->port_num); - struct hfi1_pportdata *ppd; - struct rvt_qp *qp; - struct ib_ah_attr *ah_attr; - unsigned long flags; - struct rvt_sge_state ssge; - struct rvt_sge *sge; - struct ib_wc wc; - u32 length; - enum ib_qp_type sqptype, dqptype; - - rcu_read_lock(); - - qp = rvt_lookup_qpn(ib_to_rvt(sqp->ibqp.device), &ibp->rvp, - swqe->ud_wr.remote_qpn); - if (!qp) { - ibp->rvp.n_pkt_drops++; - rcu_read_unlock(); - return; - } - - sqptype = sqp->ibqp.qp_type == IB_QPT_GSI ? - IB_QPT_UD : sqp->ibqp.qp_type; - dqptype = qp->ibqp.qp_type == IB_QPT_GSI ? - IB_QPT_UD : qp->ibqp.qp_type; - - if (dqptype != sqptype || - !(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) { - ibp->rvp.n_pkt_drops++; - goto drop; - } - - ah_attr = &ibah_to_rvtah(swqe->ud_wr.ah)->attr; - ppd = ppd_from_ibp(ibp); - - if (qp->ibqp.qp_num > 1) { - u16 pkey; - u16 slid; - u8 sc5 = ibp->sl_to_sc[ah_attr->sl]; - - pkey = hfi1_get_pkey(ibp, sqp->s_pkey_index); - slid = ppd->lid | (ah_attr->src_path_bits & - ((1 << ppd->lmc) - 1)); - if (unlikely(ingress_pkey_check(ppd, pkey, sc5, - qp->s_pkey_index, slid))) { - hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_P_KEY, pkey, - ah_attr->sl, - sqp->ibqp.qp_num, qp->ibqp.qp_num, - slid, ah_attr->dlid); - goto drop; - } - } - - /* - * Check that the qkey matches (except for QP0, see 9.6.1.4.1). - * Qkeys with the high order bit set mean use the - * qkey from the QP context instead of the WR (see 10.2.5). - */ - if (qp->ibqp.qp_num) { - u32 qkey; - - qkey = (int)swqe->ud_wr.remote_qkey < 0 ? - sqp->qkey : swqe->ud_wr.remote_qkey; - if (unlikely(qkey != qp->qkey)) { - u16 lid; - - lid = ppd->lid | (ah_attr->src_path_bits & - ((1 << ppd->lmc) - 1)); - hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_Q_KEY, qkey, - ah_attr->sl, - sqp->ibqp.qp_num, qp->ibqp.qp_num, - lid, - ah_attr->dlid); - goto drop; - } - } - - /* - * A GRH is expected to precede the data even if not - * present on the wire. - */ - length = swqe->length; - memset(&wc, 0, sizeof(wc)); - wc.byte_len = length + sizeof(struct ib_grh); - - if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) { - wc.wc_flags = IB_WC_WITH_IMM; - wc.ex.imm_data = swqe->wr.ex.imm_data; - } - - spin_lock_irqsave(&qp->r_lock, flags); - - /* - * Get the next work request entry to find where to put the data. - */ - if (qp->r_flags & RVT_R_REUSE_SGE) { - qp->r_flags &= ~RVT_R_REUSE_SGE; - } else { - int ret; - - ret = hfi1_rvt_get_rwqe(qp, 0); - if (ret < 0) { - hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR); - goto bail_unlock; - } - if (!ret) { - if (qp->ibqp.qp_num == 0) - ibp->rvp.n_vl15_dropped++; - goto bail_unlock; - } - } - /* Silently drop packets which are too big. */ - if (unlikely(wc.byte_len > qp->r_len)) { - qp->r_flags |= RVT_R_REUSE_SGE; - ibp->rvp.n_pkt_drops++; - goto bail_unlock; - } - - if (ah_attr->ah_flags & IB_AH_GRH) { - hfi1_copy_sge(&qp->r_sge, &ah_attr->grh, - sizeof(struct ib_grh), 1, 0); - wc.wc_flags |= IB_WC_GRH; - } else { - hfi1_skip_sge(&qp->r_sge, sizeof(struct ib_grh), 1); - } - ssge.sg_list = swqe->sg_list + 1; - ssge.sge = *swqe->sg_list; - ssge.num_sge = swqe->wr.num_sge; - sge = &ssge.sge; - while (length) { - u32 len = sge->length; - - if (len > length) - len = length; - if (len > sge->sge_length) - len = sge->sge_length; - WARN_ON_ONCE(len == 0); - hfi1_copy_sge(&qp->r_sge, sge->vaddr, len, 1, 0); - sge->vaddr += len; - sge->length -= len; - sge->sge_length -= len; - if (sge->sge_length == 0) { - if (--ssge.num_sge) - *sge = *ssge.sg_list++; - } else if (sge->length == 0 && sge->mr->lkey) { - if (++sge->n >= RVT_SEGSZ) { - if (++sge->m >= sge->mr->mapsz) - break; - sge->n = 0; - } - sge->vaddr = - sge->mr->map[sge->m]->segs[sge->n].vaddr; - sge->length = - sge->mr->map[sge->m]->segs[sge->n].length; - } - length -= len; - } - rvt_put_ss(&qp->r_sge); - if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) - goto bail_unlock; - wc.wr_id = qp->r_wr_id; - wc.status = IB_WC_SUCCESS; - wc.opcode = IB_WC_RECV; - wc.qp = &qp->ibqp; - wc.src_qp = sqp->ibqp.qp_num; - if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_SMI) { - if (sqp->ibqp.qp_type == IB_QPT_GSI || - sqp->ibqp.qp_type == IB_QPT_SMI) - wc.pkey_index = swqe->ud_wr.pkey_index; - else - wc.pkey_index = sqp->s_pkey_index; - } else { - wc.pkey_index = 0; - } - wc.slid = ppd->lid | (ah_attr->src_path_bits & ((1 << ppd->lmc) - 1)); - /* Check for loopback when the port lid is not set */ - if (wc.slid == 0 && sqp->ibqp.qp_type == IB_QPT_GSI) - wc.slid = be16_to_cpu(IB_LID_PERMISSIVE); - wc.sl = ah_attr->sl; - wc.dlid_path_bits = ah_attr->dlid & ((1 << ppd->lmc) - 1); - wc.port_num = qp->port_num; - /* Signal completion event if the solicited bit is set. */ - rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, - swqe->wr.send_flags & IB_SEND_SOLICITED); - ibp->rvp.n_loop_pkts++; -bail_unlock: - spin_unlock_irqrestore(&qp->r_lock, flags); -drop: - rcu_read_unlock(); -} - -/** - * hfi1_make_ud_req - construct a UD request packet - * @qp: the QP - * - * Assume s_lock is held. - * - * Return 1 if constructed; otherwise, return 0. - */ -int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps) -{ - struct hfi1_qp_priv *priv = qp->priv; - struct hfi1_other_headers *ohdr; - struct ib_ah_attr *ah_attr; - struct hfi1_pportdata *ppd; - struct hfi1_ibport *ibp; - struct rvt_swqe *wqe; - u32 nwords; - u32 extra_bytes; - u32 bth0; - u16 lrh0; - u16 lid; - int next_cur; - u8 sc5; - - ps->s_txreq = get_txreq(ps->dev, qp); - if (IS_ERR(ps->s_txreq)) - goto bail_no_tx; - - if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_NEXT_SEND_OK)) { - if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND)) - goto bail; - /* We are in the error state, flush the work request. */ - smp_read_barrier_depends(); /* see post_one_send */ - if (qp->s_last == ACCESS_ONCE(qp->s_head)) - goto bail; - /* If DMAs are in progress, we can't flush immediately. */ - if (iowait_sdma_pending(&priv->s_iowait)) { - qp->s_flags |= RVT_S_WAIT_DMA; - goto bail; - } - wqe = rvt_get_swqe_ptr(qp, qp->s_last); - hfi1_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); - goto done_free_tx; - } - - /* see post_one_send() */ - smp_read_barrier_depends(); - if (qp->s_cur == ACCESS_ONCE(qp->s_head)) - goto bail; - - wqe = rvt_get_swqe_ptr(qp, qp->s_cur); - next_cur = qp->s_cur + 1; - if (next_cur >= qp->s_size) - next_cur = 0; - - /* Construct the header. */ - ibp = to_iport(qp->ibqp.device, qp->port_num); - ppd = ppd_from_ibp(ibp); - ah_attr = &ibah_to_rvtah(wqe->ud_wr.ah)->attr; - if (ah_attr->dlid < be16_to_cpu(IB_MULTICAST_LID_BASE) || - ah_attr->dlid == be16_to_cpu(IB_LID_PERMISSIVE)) { - lid = ah_attr->dlid & ~((1 << ppd->lmc) - 1); - if (unlikely(!loopback && - (lid == ppd->lid || - (lid == be16_to_cpu(IB_LID_PERMISSIVE) && - qp->ibqp.qp_type == IB_QPT_GSI)))) { - unsigned long tflags = ps->flags; - /* - * If DMAs are in progress, we can't generate - * a completion for the loopback packet since - * it would be out of order. - * Instead of waiting, we could queue a - * zero length descriptor so we get a callback. - */ - if (iowait_sdma_pending(&priv->s_iowait)) { - qp->s_flags |= RVT_S_WAIT_DMA; - goto bail; - } - qp->s_cur = next_cur; - spin_unlock_irqrestore(&qp->s_lock, tflags); - ud_loopback(qp, wqe); - spin_lock_irqsave(&qp->s_lock, tflags); - ps->flags = tflags; - hfi1_send_complete(qp, wqe, IB_WC_SUCCESS); - goto done_free_tx; - } - } - - qp->s_cur = next_cur; - extra_bytes = -wqe->length & 3; - nwords = (wqe->length + extra_bytes) >> 2; - - /* header size in 32-bit words LRH+BTH+DETH = (8+12+8)/4. */ - qp->s_hdrwords = 7; - qp->s_cur_size = wqe->length; - qp->s_cur_sge = &qp->s_sge; - qp->s_srate = ah_attr->static_rate; - qp->srate_mbps = ib_rate_to_mbps(qp->s_srate); - qp->s_wqe = wqe; - qp->s_sge.sge = wqe->sg_list[0]; - qp->s_sge.sg_list = wqe->sg_list + 1; - qp->s_sge.num_sge = wqe->wr.num_sge; - qp->s_sge.total_len = wqe->length; - - if (ah_attr->ah_flags & IB_AH_GRH) { - /* Header size in 32-bit words. */ - qp->s_hdrwords += hfi1_make_grh(ibp, - &ps->s_txreq->phdr.hdr.u.l.grh, - &ah_attr->grh, - qp->s_hdrwords, nwords); - lrh0 = HFI1_LRH_GRH; - ohdr = &ps->s_txreq->phdr.hdr.u.l.oth; - /* - * Don't worry about sending to locally attached multicast - * QPs. It is unspecified by the spec. what happens. - */ - } else { - /* Header size in 32-bit words. */ - lrh0 = HFI1_LRH_BTH; - ohdr = &ps->s_txreq->phdr.hdr.u.oth; - } - if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) { - qp->s_hdrwords++; - ohdr->u.ud.imm_data = wqe->wr.ex.imm_data; - bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24; - } else { - bth0 = IB_OPCODE_UD_SEND_ONLY << 24; - } - sc5 = ibp->sl_to_sc[ah_attr->sl]; - lrh0 |= (ah_attr->sl & 0xf) << 4; - if (qp->ibqp.qp_type == IB_QPT_SMI) { - lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */ - priv->s_sc = 0xf; - } else { - lrh0 |= (sc5 & 0xf) << 12; - priv->s_sc = sc5; - } - priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); - ps->s_txreq->sde = priv->s_sde; - priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc); - ps->s_txreq->psc = priv->s_sendcontext; - ps->s_txreq->phdr.hdr.lrh[0] = cpu_to_be16(lrh0); - ps->s_txreq->phdr.hdr.lrh[1] = cpu_to_be16(ah_attr->dlid); - ps->s_txreq->phdr.hdr.lrh[2] = - cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC); - if (ah_attr->dlid == be16_to_cpu(IB_LID_PERMISSIVE)) { - ps->s_txreq->phdr.hdr.lrh[3] = IB_LID_PERMISSIVE; - } else { - lid = ppd->lid; - if (lid) { - lid |= ah_attr->src_path_bits & ((1 << ppd->lmc) - 1); - ps->s_txreq->phdr.hdr.lrh[3] = cpu_to_be16(lid); - } else { - ps->s_txreq->phdr.hdr.lrh[3] = IB_LID_PERMISSIVE; - } - } - if (wqe->wr.send_flags & IB_SEND_SOLICITED) - bth0 |= IB_BTH_SOLICITED; - bth0 |= extra_bytes << 20; - if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_SMI) - bth0 |= hfi1_get_pkey(ibp, wqe->ud_wr.pkey_index); - else - bth0 |= hfi1_get_pkey(ibp, qp->s_pkey_index); - ohdr->bth[0] = cpu_to_be32(bth0); - ohdr->bth[1] = cpu_to_be32(wqe->ud_wr.remote_qpn); - ohdr->bth[2] = cpu_to_be32(mask_psn(wqe->psn)); - /* - * Qkeys with the high order bit set mean use the - * qkey from the QP context instead of the WR (see 10.2.5). - */ - ohdr->u.ud.deth[0] = cpu_to_be32((int)wqe->ud_wr.remote_qkey < 0 ? - qp->qkey : wqe->ud_wr.remote_qkey); - ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num); - /* disarm any ahg */ - priv->s_hdr->ahgcount = 0; - priv->s_hdr->ahgidx = 0; - priv->s_hdr->tx_flags = 0; - priv->s_hdr->sde = NULL; - /* pbc */ - ps->s_txreq->hdr_dwords = qp->s_hdrwords + 2; - - return 1; - -done_free_tx: - hfi1_put_txreq(ps->s_txreq); - ps->s_txreq = NULL; - return 1; - -bail: - hfi1_put_txreq(ps->s_txreq); - -bail_no_tx: - ps->s_txreq = NULL; - qp->s_flags &= ~RVT_S_BUSY; - qp->s_hdrwords = 0; - return 0; -} - -/* - * Hardware can't check this so we do it here. - * - * This is a slightly different algorithm than the standard pkey check. It - * special cases the management keys and allows for 0x7fff and 0xffff to be in - * the table at the same time. - * - * @returns the index found or -1 if not found - */ -int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey) -{ - struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); - unsigned i; - - if (pkey == FULL_MGMT_P_KEY || pkey == LIM_MGMT_P_KEY) { - unsigned lim_idx = -1; - - for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i) { - /* here we look for an exact match */ - if (ppd->pkeys[i] == pkey) - return i; - if (ppd->pkeys[i] == LIM_MGMT_P_KEY) - lim_idx = i; - } - - /* did not find 0xffff return 0x7fff idx if found */ - if (pkey == FULL_MGMT_P_KEY) - return lim_idx; - - /* no match... */ - return -1; - } - - pkey &= 0x7fff; /* remove limited/full membership bit */ - - for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i) - if ((ppd->pkeys[i] & 0x7fff) == pkey) - return i; - - /* - * Should not get here, this means hardware failed to validate pkeys. - */ - return -1; -} - -void return_cnp(struct hfi1_ibport *ibp, struct rvt_qp *qp, u32 remote_qpn, - u32 pkey, u32 slid, u32 dlid, u8 sc5, - const struct ib_grh *old_grh) -{ - u64 pbc, pbc_flags = 0; - u32 bth0, plen, vl, hwords = 5; - u16 lrh0; - u8 sl = ibp->sc_to_sl[sc5]; - struct hfi1_ib_header hdr; - struct hfi1_other_headers *ohdr; - struct pio_buf *pbuf; - struct send_context *ctxt = qp_to_send_context(qp, sc5); - struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); - - if (old_grh) { - struct ib_grh *grh = &hdr.u.l.grh; - - grh->version_tclass_flow = old_grh->version_tclass_flow; - grh->paylen = cpu_to_be16((hwords - 2 + SIZE_OF_CRC) << 2); - grh->hop_limit = 0xff; - grh->sgid = old_grh->dgid; - grh->dgid = old_grh->sgid; - ohdr = &hdr.u.l.oth; - lrh0 = HFI1_LRH_GRH; - hwords += sizeof(struct ib_grh) / sizeof(u32); - } else { - ohdr = &hdr.u.oth; - lrh0 = HFI1_LRH_BTH; - } - - lrh0 |= (sc5 & 0xf) << 12 | sl << 4; - - bth0 = pkey | (IB_OPCODE_CNP << 24); - ohdr->bth[0] = cpu_to_be32(bth0); - - ohdr->bth[1] = cpu_to_be32(remote_qpn | (1 << HFI1_BECN_SHIFT)); - ohdr->bth[2] = 0; /* PSN 0 */ - - hdr.lrh[0] = cpu_to_be16(lrh0); - hdr.lrh[1] = cpu_to_be16(dlid); - hdr.lrh[2] = cpu_to_be16(hwords + SIZE_OF_CRC); - hdr.lrh[3] = cpu_to_be16(slid); - - plen = 2 /* PBC */ + hwords; - pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT; - vl = sc_to_vlt(ppd->dd, sc5); - pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen); - if (ctxt) { - pbuf = sc_buffer_alloc(ctxt, plen, NULL, NULL); - if (pbuf) - ppd->dd->pio_inline_send(ppd->dd, pbuf, pbc, - &hdr, hwords); - } -} - -/* - * opa_smp_check() - Do the regular pkey checking, and the additional - * checks for SMPs specified in OPAv1 rev 0.90, section 9.10.26 - * ("SMA Packet Checks"). - * - * Note that: - * - Checks are done using the pkey directly from the packet's BTH, - * and specifically _not_ the pkey that we attach to the completion, - * which may be different. - * - These checks are specifically for "non-local" SMPs (i.e., SMPs - * which originated on another node). SMPs which are sent from, and - * destined to this node are checked in opa_local_smp_check(). - * - * At the point where opa_smp_check() is called, we know: - * - destination QP is QP0 - * - * opa_smp_check() returns 0 if all checks succeed, 1 otherwise. - */ -static int opa_smp_check(struct hfi1_ibport *ibp, u16 pkey, u8 sc5, - struct rvt_qp *qp, u16 slid, struct opa_smp *smp) -{ - struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); - - /* - * I don't think it's possible for us to get here with sc != 0xf, - * but check it to be certain. - */ - if (sc5 != 0xf) - return 1; - - if (rcv_pkey_check(ppd, pkey, sc5, slid)) - return 1; - - /* - * At this point we know (and so don't need to check again) that - * the pkey is either LIM_MGMT_P_KEY, or FULL_MGMT_P_KEY - * (see ingress_pkey_check). - */ - if (smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE && - smp->mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED) { - ingress_pkey_table_fail(ppd, pkey, slid); - return 1; - } - - /* - * SMPs fall into one of four (disjoint) categories: - * SMA request, SMA response, trap, or trap repress. - * Our response depends, in part, on which type of - * SMP we're processing. - * - * If this is not an SMA request, or trap repress: - * - accept MAD if the port is running an SM - * - pkey == FULL_MGMT_P_KEY => - * reply with unsupported method (i.e., just mark - * the smp's status field here, and let it be - * processed normally) - * - pkey != LIM_MGMT_P_KEY => - * increment port recv constraint errors, drop MAD - * If this is an SMA request or trap repress: - * - pkey != FULL_MGMT_P_KEY => - * increment port recv constraint errors, drop MAD - */ - switch (smp->method) { - case IB_MGMT_METHOD_GET: - case IB_MGMT_METHOD_SET: - case IB_MGMT_METHOD_REPORT: - case IB_MGMT_METHOD_TRAP_REPRESS: - if (pkey != FULL_MGMT_P_KEY) { - ingress_pkey_table_fail(ppd, pkey, slid); - return 1; - } - break; - case IB_MGMT_METHOD_SEND: - case IB_MGMT_METHOD_TRAP: - case IB_MGMT_METHOD_GET_RESP: - case IB_MGMT_METHOD_REPORT_RESP: - if (ibp->rvp.port_cap_flags & IB_PORT_SM) - return 0; - if (pkey == FULL_MGMT_P_KEY) { - smp->status |= IB_SMP_UNSUP_METHOD; - return 0; - } - if (pkey != LIM_MGMT_P_KEY) { - ingress_pkey_table_fail(ppd, pkey, slid); - return 1; - } - break; - default: - break; - } - return 0; -} - -/** - * hfi1_ud_rcv - receive an incoming UD packet - * @ibp: the port the packet came in on - * @hdr: the packet header - * @rcv_flags: flags relevant to rcv processing - * @data: the packet data - * @tlen: the packet length - * @qp: the QP the packet came on - * - * This is called from qp_rcv() to process an incoming UD packet - * for the given QP. - * Called at interrupt level. - */ -void hfi1_ud_rcv(struct hfi1_packet *packet) -{ - struct hfi1_other_headers *ohdr = packet->ohdr; - int opcode; - u32 hdrsize = packet->hlen; - u32 pad; - struct ib_wc wc; - u32 qkey; - u32 src_qp; - u16 dlid, pkey; - int mgmt_pkey_idx = -1; - struct hfi1_ibport *ibp = &packet->rcd->ppd->ibport_data; - struct hfi1_ib_header *hdr = packet->hdr; - u32 rcv_flags = packet->rcv_flags; - void *data = packet->ebuf; - u32 tlen = packet->tlen; - struct rvt_qp *qp = packet->qp; - bool has_grh = rcv_flags & HFI1_HAS_GRH; - bool sc4_bit = has_sc4_bit(packet); - u8 sc; - u32 bth1; - int is_mcast; - struct ib_grh *grh = NULL; - - qkey = be32_to_cpu(ohdr->u.ud.deth[0]); - src_qp = be32_to_cpu(ohdr->u.ud.deth[1]) & RVT_QPN_MASK; - dlid = be16_to_cpu(hdr->lrh[1]); - is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) && - (dlid != be16_to_cpu(IB_LID_PERMISSIVE)); - bth1 = be32_to_cpu(ohdr->bth[1]); - if (unlikely(bth1 & HFI1_BECN_SMASK)) { - /* - * In pre-B0 h/w the CNP_OPCODE is handled via an - * error path. - */ - struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); - u32 lqpn = be32_to_cpu(ohdr->bth[1]) & RVT_QPN_MASK; - u8 sl, sc5; - - sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf; - sc5 |= sc4_bit; - sl = ibp->sc_to_sl[sc5]; - - process_becn(ppd, sl, 0, lqpn, 0, IB_CC_SVCTYPE_UD); - } - - /* - * The opcode is in the low byte when its in network order - * (top byte when in host order). - */ - opcode = be32_to_cpu(ohdr->bth[0]) >> 24; - opcode &= 0xff; - - pkey = (u16)be32_to_cpu(ohdr->bth[0]); - - if (!is_mcast && (opcode != IB_OPCODE_CNP) && bth1 & HFI1_FECN_SMASK) { - u16 slid = be16_to_cpu(hdr->lrh[3]); - u8 sc5; - - sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf; - sc5 |= sc4_bit; - - return_cnp(ibp, qp, src_qp, pkey, dlid, slid, sc5, grh); - } - /* - * Get the number of bytes the message was padded by - * and drop incomplete packets. - */ - pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; - if (unlikely(tlen < (hdrsize + pad + 4))) - goto drop; - - tlen -= hdrsize + pad + 4; - - /* - * Check that the permissive LID is only used on QP0 - * and the QKEY matches (see 9.6.1.4.1 and 9.6.1.5.1). - */ - if (qp->ibqp.qp_num) { - if (unlikely(hdr->lrh[1] == IB_LID_PERMISSIVE || - hdr->lrh[3] == IB_LID_PERMISSIVE)) - goto drop; - if (qp->ibqp.qp_num > 1) { - struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); - u16 slid; - u8 sc5; - - sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf; - sc5 |= sc4_bit; - - slid = be16_to_cpu(hdr->lrh[3]); - if (unlikely(rcv_pkey_check(ppd, pkey, sc5, slid))) { - /* - * Traps will not be sent for packets dropped - * by the HW. This is fine, as sending trap - * for invalid pkeys is optional according to - * IB spec (release 1.3, section 10.9.4) - */ - hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_P_KEY, - pkey, - (be16_to_cpu(hdr->lrh[0]) >> 4) & - 0xF, - src_qp, qp->ibqp.qp_num, - be16_to_cpu(hdr->lrh[3]), - be16_to_cpu(hdr->lrh[1])); - return; - } - } else { - /* GSI packet */ - mgmt_pkey_idx = hfi1_lookup_pkey_idx(ibp, pkey); - if (mgmt_pkey_idx < 0) - goto drop; - } - if (unlikely(qkey != qp->qkey)) { - hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_Q_KEY, qkey, - (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF, - src_qp, qp->ibqp.qp_num, - be16_to_cpu(hdr->lrh[3]), - be16_to_cpu(hdr->lrh[1])); - return; - } - /* Drop invalid MAD packets (see 13.5.3.1). */ - if (unlikely(qp->ibqp.qp_num == 1 && - (tlen > 2048 || - (be16_to_cpu(hdr->lrh[0]) >> 12) == 15))) - goto drop; - } else { - /* Received on QP0, and so by definition, this is an SMP */ - struct opa_smp *smp = (struct opa_smp *)data; - u16 slid = be16_to_cpu(hdr->lrh[3]); - u8 sc5; - - sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf; - sc5 |= sc4_bit; - - if (opa_smp_check(ibp, pkey, sc5, qp, slid, smp)) - goto drop; - - if (tlen > 2048) - goto drop; - if ((hdr->lrh[1] == IB_LID_PERMISSIVE || - hdr->lrh[3] == IB_LID_PERMISSIVE) && - smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) - goto drop; - - /* look up SMI pkey */ - mgmt_pkey_idx = hfi1_lookup_pkey_idx(ibp, pkey); - if (mgmt_pkey_idx < 0) - goto drop; - } - - if (qp->ibqp.qp_num > 1 && - opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) { - wc.ex.imm_data = ohdr->u.ud.imm_data; - wc.wc_flags = IB_WC_WITH_IMM; - tlen -= sizeof(u32); - } else if (opcode == IB_OPCODE_UD_SEND_ONLY) { - wc.ex.imm_data = 0; - wc.wc_flags = 0; - } else { - goto drop; - } - - /* - * A GRH is expected to precede the data even if not - * present on the wire. - */ - wc.byte_len = tlen + sizeof(struct ib_grh); - - /* - * Get the next work request entry to find where to put the data. - */ - if (qp->r_flags & RVT_R_REUSE_SGE) { - qp->r_flags &= ~RVT_R_REUSE_SGE; - } else { - int ret; - - ret = hfi1_rvt_get_rwqe(qp, 0); - if (ret < 0) { - hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR); - return; - } - if (!ret) { - if (qp->ibqp.qp_num == 0) - ibp->rvp.n_vl15_dropped++; - return; - } - } - /* Silently drop packets which are too big. */ - if (unlikely(wc.byte_len > qp->r_len)) { - qp->r_flags |= RVT_R_REUSE_SGE; - goto drop; - } - if (has_grh) { - hfi1_copy_sge(&qp->r_sge, &hdr->u.l.grh, - sizeof(struct ib_grh), 1, 0); - wc.wc_flags |= IB_WC_GRH; - } else { - hfi1_skip_sge(&qp->r_sge, sizeof(struct ib_grh), 1); - } - hfi1_copy_sge(&qp->r_sge, data, wc.byte_len - sizeof(struct ib_grh), - 1, 0); - rvt_put_ss(&qp->r_sge); - if (!test_and_clear_bit(RVT_R_WRID_VALID, &qp->r_aflags)) - return; - wc.wr_id = qp->r_wr_id; - wc.status = IB_WC_SUCCESS; - wc.opcode = IB_WC_RECV; - wc.vendor_err = 0; - wc.qp = &qp->ibqp; - wc.src_qp = src_qp; - - if (qp->ibqp.qp_type == IB_QPT_GSI || - qp->ibqp.qp_type == IB_QPT_SMI) { - if (mgmt_pkey_idx < 0) { - if (net_ratelimit()) { - struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); - struct hfi1_devdata *dd = ppd->dd; - - dd_dev_err(dd, "QP type %d mgmt_pkey_idx < 0 and packet not dropped???\n", - qp->ibqp.qp_type); - mgmt_pkey_idx = 0; - } - } - wc.pkey_index = (unsigned)mgmt_pkey_idx; - } else { - wc.pkey_index = 0; - } - - wc.slid = be16_to_cpu(hdr->lrh[3]); - sc = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf; - sc |= sc4_bit; - wc.sl = ibp->sc_to_sl[sc]; - - /* - * Save the LMC lower bits if the destination LID is a unicast LID. - */ - wc.dlid_path_bits = dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE) ? 0 : - dlid & ((1 << ppd_from_ibp(ibp)->lmc) - 1); - wc.port_num = qp->port_num; - /* Signal completion event if the solicited bit is set. */ - rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, - (ohdr->bth[0] & - cpu_to_be32(IB_BTH_SOLICITED)) != 0); - return; - -drop: - ibp->rvp.n_pkt_drops++; -} |