v4.19.13 snapshot.
diff --git a/drivers/infiniband/hw/hfi1/ud.c b/drivers/infiniband/hw/hfi1/ud.c
new file mode 100644
index 0000000..70d39fc
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/ud.c
@@ -0,0 +1,1083 @@
+/*
+ * Copyright(c) 2015 - 2018 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"
+
+/* We support only two types - 9B and 16B for now */
+static const hfi1_make_req hfi1_make_ud_req_tbl[2] = {
+ [HFI1_PKT_TYPE_9B] = &hfi1_make_ud_req_9B,
+ [HFI1_PKT_TYPE_16B] = &hfi1_make_ud_req_16B
+};
+
+/**
+ * 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 hfi1_qp_priv *priv = sqp->priv;
+ struct rvt_qp *qp;
+ struct rdma_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;
+ u32 slid;
+ u8 sc5 = ibp->sl_to_sc[rdma_ah_get_sl(ah_attr)];
+
+ pkey = hfi1_get_pkey(ibp, sqp->s_pkey_index);
+ slid = ppd->lid | (rdma_ah_get_path_bits(ah_attr) &
+ ((1 << ppd->lmc) - 1));
+ if (unlikely(ingress_pkey_check(ppd, pkey, sc5,
+ qp->s_pkey_index,
+ slid, false))) {
+ hfi1_bad_pkey(ibp, pkey,
+ rdma_ah_get_sl(ah_attr),
+ sqp->ibqp.qp_num, qp->ibqp.qp_num,
+ slid, rdma_ah_get_dlid(ah_attr));
+ 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))
+ goto drop; /* silently drop per IBTA spec */
+ }
+
+ /*
+ * 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 = rvt_get_rwqe(qp, false);
+ if (ret < 0) {
+ rvt_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 (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
+ struct ib_grh grh;
+ struct ib_global_route grd = *(rdma_ah_read_grh(ah_attr));
+
+ /*
+ * For loopback packets with extended LIDs, the
+ * sgid_index in the GRH is 0 and the dgid is
+ * OPA GID of the sender. While creating a response
+ * to the loopback packet, IB core creates the new
+ * sgid_index from the DGID and that will be the
+ * OPA_GID_INDEX. The new dgid is from the sgid
+ * index and that will be in the IB GID format.
+ *
+ * We now have a case where the sent packet had a
+ * different sgid_index and dgid compared to the
+ * one that was received in response.
+ *
+ * Fix this inconsistency.
+ */
+ if (priv->hdr_type == HFI1_PKT_TYPE_16B) {
+ if (grd.sgid_index == 0)
+ grd.sgid_index = OPA_GID_INDEX;
+
+ if (ib_is_opa_gid(&grd.dgid))
+ grd.dgid.global.interface_id =
+ cpu_to_be64(ppd->guids[HFI1_PORT_GUID_INDEX]);
+ }
+
+ hfi1_make_grh(ibp, &grh, &grd, 0, 0);
+ hfi1_copy_sge(&qp->r_sge, &grh,
+ sizeof(grh), true, false);
+ wc.wc_flags |= IB_WC_GRH;
+ } else {
+ rvt_skip_sge(&qp->r_sge, sizeof(struct ib_grh), true);
+ }
+ 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, true, false);
+ 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 | (rdma_ah_get_path_bits(ah_attr) &
+ ((1 << ppd->lmc) - 1))) & U16_MAX;
+ /* 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 = rdma_ah_get_sl(ah_attr);
+ wc.dlid_path_bits = rdma_ah_get_dlid(ah_attr) & ((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();
+}
+
+static void hfi1_make_bth_deth(struct rvt_qp *qp, struct rvt_swqe *wqe,
+ struct ib_other_headers *ohdr,
+ u16 *pkey, u32 extra_bytes, bool bypass)
+{
+ u32 bth0;
+ struct hfi1_ibport *ibp;
+
+ ibp = to_iport(qp->ibqp.device, qp->port_num);
+ if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) {
+ 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;
+ }
+
+ 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)
+ *pkey = hfi1_get_pkey(ibp, wqe->ud_wr.pkey_index);
+ else
+ *pkey = hfi1_get_pkey(ibp, qp->s_pkey_index);
+ if (!bypass)
+ bth0 |= *pkey;
+ 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);
+}
+
+void hfi1_make_ud_req_9B(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
+ struct rvt_swqe *wqe)
+{
+ u32 nwords, extra_bytes;
+ u16 len, slid, dlid, pkey;
+ u16 lrh0 = 0;
+ u8 sc5;
+ struct hfi1_qp_priv *priv = qp->priv;
+ struct ib_other_headers *ohdr;
+ struct rdma_ah_attr *ah_attr;
+ struct hfi1_pportdata *ppd;
+ struct hfi1_ibport *ibp;
+ struct ib_grh *grh;
+
+ ibp = to_iport(qp->ibqp.device, qp->port_num);
+ ppd = ppd_from_ibp(ibp);
+ ah_attr = &ibah_to_rvtah(wqe->ud_wr.ah)->attr;
+
+ extra_bytes = -wqe->length & 3;
+ nwords = ((wqe->length + extra_bytes) >> 2) + SIZE_OF_CRC;
+ /* header size in dwords LRH+BTH+DETH = (8+12+8)/4. */
+ ps->s_txreq->hdr_dwords = 7;
+ if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM)
+ ps->s_txreq->hdr_dwords++;
+
+ if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
+ grh = &ps->s_txreq->phdr.hdr.ibh.u.l.grh;
+ ps->s_txreq->hdr_dwords +=
+ hfi1_make_grh(ibp, grh, rdma_ah_read_grh(ah_attr),
+ ps->s_txreq->hdr_dwords - LRH_9B_DWORDS,
+ nwords);
+ lrh0 = HFI1_LRH_GRH;
+ ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth;
+ } else {
+ lrh0 = HFI1_LRH_BTH;
+ ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth;
+ }
+
+ sc5 = ibp->sl_to_sc[rdma_ah_get_sl(ah_attr)];
+ lrh0 |= (rdma_ah_get_sl(ah_attr) & 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;
+ }
+
+ dlid = opa_get_lid(rdma_ah_get_dlid(ah_attr), 9B);
+ if (dlid == be16_to_cpu(IB_LID_PERMISSIVE)) {
+ slid = be16_to_cpu(IB_LID_PERMISSIVE);
+ } else {
+ u16 lid = (u16)ppd->lid;
+
+ if (lid) {
+ lid |= rdma_ah_get_path_bits(ah_attr) &
+ ((1 << ppd->lmc) - 1);
+ slid = lid;
+ } else {
+ slid = be16_to_cpu(IB_LID_PERMISSIVE);
+ }
+ }
+ hfi1_make_bth_deth(qp, wqe, ohdr, &pkey, extra_bytes, false);
+ len = ps->s_txreq->hdr_dwords + nwords;
+
+ /* Setup the packet */
+ ps->s_txreq->phdr.hdr.hdr_type = HFI1_PKT_TYPE_9B;
+ hfi1_make_ib_hdr(&ps->s_txreq->phdr.hdr.ibh,
+ lrh0, len, dlid, slid);
+}
+
+void hfi1_make_ud_req_16B(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
+ struct rvt_swqe *wqe)
+{
+ struct hfi1_qp_priv *priv = qp->priv;
+ struct ib_other_headers *ohdr;
+ struct rdma_ah_attr *ah_attr;
+ struct hfi1_pportdata *ppd;
+ struct hfi1_ibport *ibp;
+ u32 dlid, slid, nwords, extra_bytes;
+ u32 dest_qp = wqe->ud_wr.remote_qpn;
+ u32 src_qp = qp->ibqp.qp_num;
+ u16 len, pkey;
+ u8 l4, sc5;
+ bool is_mgmt = false;
+
+ ibp = to_iport(qp->ibqp.device, qp->port_num);
+ ppd = ppd_from_ibp(ibp);
+ ah_attr = &ibah_to_rvtah(wqe->ud_wr.ah)->attr;
+
+ /*
+ * Build 16B Management Packet if either the destination
+ * or source queue pair number is 0 or 1.
+ */
+ if (dest_qp == 0 || src_qp == 0 || dest_qp == 1 || src_qp == 1) {
+ /* header size in dwords 16B LRH+L4_FM = (16+8)/4. */
+ ps->s_txreq->hdr_dwords = 6;
+ is_mgmt = true;
+ } else {
+ /* header size in dwords 16B LRH+BTH+DETH = (16+12+8)/4. */
+ ps->s_txreq->hdr_dwords = 9;
+ if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM)
+ ps->s_txreq->hdr_dwords++;
+ }
+
+ /* SW provides space for CRC and LT for bypass packets. */
+ extra_bytes = hfi1_get_16b_padding((ps->s_txreq->hdr_dwords << 2),
+ wqe->length);
+ nwords = ((wqe->length + extra_bytes + SIZE_OF_LT) >> 2) + SIZE_OF_CRC;
+
+ if ((rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) &&
+ hfi1_check_mcast(rdma_ah_get_dlid(ah_attr))) {
+ struct ib_grh *grh;
+ struct ib_global_route *grd = rdma_ah_retrieve_grh(ah_attr);
+ /*
+ * Ensure OPA GIDs are transformed to IB gids
+ * before creating the GRH.
+ */
+ if (grd->sgid_index == OPA_GID_INDEX) {
+ dd_dev_warn(ppd->dd, "Bad sgid_index. sgid_index: %d\n",
+ grd->sgid_index);
+ grd->sgid_index = 0;
+ }
+ grh = &ps->s_txreq->phdr.hdr.opah.u.l.grh;
+ ps->s_txreq->hdr_dwords += hfi1_make_grh(
+ ibp, grh, grd,
+ ps->s_txreq->hdr_dwords - LRH_16B_DWORDS,
+ nwords);
+ ohdr = &ps->s_txreq->phdr.hdr.opah.u.l.oth;
+ l4 = OPA_16B_L4_IB_GLOBAL;
+ } else {
+ ohdr = &ps->s_txreq->phdr.hdr.opah.u.oth;
+ l4 = OPA_16B_L4_IB_LOCAL;
+ }
+
+ sc5 = ibp->sl_to_sc[rdma_ah_get_sl(ah_attr)];
+ if (qp->ibqp.qp_type == IB_QPT_SMI)
+ priv->s_sc = 0xf;
+ else
+ priv->s_sc = sc5;
+
+ dlid = opa_get_lid(rdma_ah_get_dlid(ah_attr), 16B);
+ if (!ppd->lid)
+ slid = be32_to_cpu(OPA_LID_PERMISSIVE);
+ else
+ slid = ppd->lid | (rdma_ah_get_path_bits(ah_attr) &
+ ((1 << ppd->lmc) - 1));
+
+ if (is_mgmt) {
+ l4 = OPA_16B_L4_FM;
+ pkey = hfi1_get_pkey(ibp, wqe->ud_wr.pkey_index);
+ hfi1_16B_set_qpn(&ps->s_txreq->phdr.hdr.opah.u.mgmt,
+ dest_qp, src_qp);
+ } else {
+ hfi1_make_bth_deth(qp, wqe, ohdr, &pkey, extra_bytes, true);
+ }
+ /* Convert dwords to flits */
+ len = (ps->s_txreq->hdr_dwords + nwords) >> 1;
+
+ /* Setup the packet */
+ ps->s_txreq->phdr.hdr.hdr_type = HFI1_PKT_TYPE_16B;
+ hfi1_make_16b_hdr(&ps->s_txreq->phdr.hdr.opah,
+ slid, dlid, len, pkey, 0, 0, l4, priv->s_sc);
+}
+
+/**
+ * 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 rdma_ah_attr *ah_attr;
+ struct hfi1_pportdata *ppd;
+ struct hfi1_ibport *ibp;
+ struct rvt_swqe *wqe;
+ int next_cur;
+ u32 lid;
+
+ ps->s_txreq = get_txreq(ps->dev, qp);
+ if (!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. */
+ if (qp->s_last == READ_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() */
+ if (qp->s_cur == READ_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;
+ priv->hdr_type = hfi1_get_hdr_type(ppd->lid, ah_attr);
+ if ((!hfi1_check_mcast(rdma_ah_get_dlid(ah_attr))) ||
+ (rdma_ah_get_dlid(ah_attr) == be32_to_cpu(OPA_LID_PERMISSIVE))) {
+ lid = rdma_ah_get_dlid(ah_attr) & ~((1 << ppd->lmc) - 1);
+ if (unlikely(!loopback &&
+ ((lid == ppd->lid) ||
+ ((lid == be32_to_cpu(OPA_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;
+ ps->s_txreq->s_cur_size = wqe->length;
+ ps->s_txreq->ss = &qp->s_sge;
+ qp->s_srate = rdma_ah_get_static_rate(ah_attr);
+ 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;
+
+ /* Make the appropriate header */
+ hfi1_make_ud_req_tbl[priv->hdr_type](qp, ps, qp->s_wqe);
+ 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;
+ /* disarm any ahg */
+ priv->s_ahg->ahgcount = 0;
+ priv->s_ahg->ahgidx = 0;
+ priv->s_ahg->tx_flags = 0;
+
+ 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;
+ 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_16B(struct hfi1_ibport *ibp, struct rvt_qp *qp,
+ u32 remote_qpn, u16 pkey, u32 slid, u32 dlid,
+ u8 sc5, const struct ib_grh *old_grh)
+{
+ u64 pbc, pbc_flags = 0;
+ u32 bth0, plen, vl, hwords = 7;
+ u16 len;
+ u8 l4;
+ struct hfi1_16b_header hdr;
+ struct ib_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);
+ u32 nwords;
+
+ /* Populate length */
+ nwords = ((hfi1_get_16b_padding(hwords << 2, 0) +
+ SIZE_OF_LT) >> 2) + SIZE_OF_CRC;
+ 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 - LRH_16B_DWORDS + nwords) << 2);
+ grh->hop_limit = 0xff;
+ grh->sgid = old_grh->dgid;
+ grh->dgid = old_grh->sgid;
+ ohdr = &hdr.u.l.oth;
+ l4 = OPA_16B_L4_IB_GLOBAL;
+ hwords += sizeof(struct ib_grh) / sizeof(u32);
+ } else {
+ ohdr = &hdr.u.oth;
+ l4 = OPA_16B_L4_IB_LOCAL;
+ }
+
+ /* BIT 16 to 19 is TVER. Bit 20 to 22 is pad cnt */
+ bth0 = (IB_OPCODE_CNP << 24) | (1 << 16) |
+ (hfi1_get_16b_padding(hwords << 2, 0) << 20);
+ ohdr->bth[0] = cpu_to_be32(bth0);
+
+ ohdr->bth[1] = cpu_to_be32(remote_qpn);
+ ohdr->bth[2] = 0; /* PSN 0 */
+
+ /* Convert dwords to flits */
+ len = (hwords + nwords) >> 1;
+ hfi1_make_16b_hdr(&hdr, slid, dlid, len, pkey, 1, 0, l4, sc5);
+
+ plen = 2 /* PBC */ + hwords + nwords;
+ pbc_flags |= PBC_PACKET_BYPASS | PBC_INSERT_BYPASS_ICRC;
+ 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);
+ }
+}
+
+void return_cnp(struct hfi1_ibport *ibp, struct rvt_qp *qp, u32 remote_qpn,
+ u16 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 ib_header hdr;
+ struct ib_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 - LRH_9B_DWORDS + 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 << IB_BECN_SHIFT));
+ ohdr->bth[2] = 0; /* PSN 0 */
+
+ hfi1_make_ib_hdr(&hdr, lrh0, hwords + SIZE_OF_CRC, dlid, slid);
+ plen = 2 /* PBC */ + hwords;
+ pbc_flags |= (ib_is_sc5(sc5) << 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 1.0, 9/19/2016 update, section
+ * 9.10.25 ("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, SMA trap, or SMA trap repress.
+ * Our response depends, in part, on which type of SMP we're
+ * processing.
+ *
+ * If this is an SMA response, skip the check here.
+ *
+ * If this is an SMA request or SMA trap repress:
+ * - pkey != FULL_MGMT_P_KEY =>
+ * increment port recv constraint errors, drop MAD
+ *
+ * Otherwise:
+ * - accept if the port is running an SM
+ * - drop MAD if it's an SMA trap
+ * - pkey == FULL_MGMT_P_KEY =>
+ * reply with unsupported method
+ * - pkey != FULL_MGMT_P_KEY =>
+ * increment port recv constraint errors, drop MAD
+ */
+ switch (smp->method) {
+ case IB_MGMT_METHOD_GET_RESP:
+ case IB_MGMT_METHOD_REPORT_RESP:
+ break;
+ 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;
+ default:
+ if (ibp->rvp.port_cap_flags & IB_PORT_SM)
+ return 0;
+ if (smp->method == IB_MGMT_METHOD_TRAP)
+ return 1;
+ if (pkey == FULL_MGMT_P_KEY) {
+ smp->status |= IB_SMP_UNSUP_METHOD;
+ return 0;
+ }
+ ingress_pkey_table_fail(ppd, pkey, slid);
+ return 1;
+ }
+ 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)
+{
+ u32 hdrsize = packet->hlen;
+ struct ib_wc wc;
+ u32 src_qp;
+ u16 pkey;
+ int mgmt_pkey_idx = -1;
+ struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ void *data = packet->payload;
+ u32 tlen = packet->tlen;
+ struct rvt_qp *qp = packet->qp;
+ u8 sc5 = packet->sc;
+ u8 sl_from_sc;
+ u8 opcode = packet->opcode;
+ u8 sl = packet->sl;
+ u32 dlid = packet->dlid;
+ u32 slid = packet->slid;
+ u8 extra_bytes;
+ u8 l4 = 0;
+ bool dlid_is_permissive;
+ bool slid_is_permissive;
+ bool solicited = false;
+
+ extra_bytes = packet->pad + packet->extra_byte + (SIZE_OF_CRC << 2);
+
+ if (packet->etype == RHF_RCV_TYPE_BYPASS) {
+ u32 permissive_lid =
+ opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 16B);
+
+ l4 = hfi1_16B_get_l4(packet->hdr);
+ pkey = hfi1_16B_get_pkey(packet->hdr);
+ dlid_is_permissive = (dlid == permissive_lid);
+ slid_is_permissive = (slid == permissive_lid);
+ } else {
+ pkey = ib_bth_get_pkey(packet->ohdr);
+ dlid_is_permissive = (dlid == be16_to_cpu(IB_LID_PERMISSIVE));
+ slid_is_permissive = (slid == be16_to_cpu(IB_LID_PERMISSIVE));
+ }
+ sl_from_sc = ibp->sc_to_sl[sc5];
+
+ if (likely(l4 != OPA_16B_L4_FM)) {
+ src_qp = ib_get_sqpn(packet->ohdr);
+ solicited = ib_bth_is_solicited(packet->ohdr);
+ } else {
+ src_qp = hfi1_16B_get_src_qpn(packet->mgmt);
+ }
+
+ process_ecn(qp, packet, (opcode != IB_OPCODE_CNP));
+ /*
+ * Get the number of bytes the message was padded by
+ * and drop incomplete packets.
+ */
+ if (unlikely(tlen < (hdrsize + extra_bytes)))
+ goto drop;
+
+ tlen -= hdrsize + extra_bytes;
+
+ /*
+ * 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(dlid_is_permissive || slid_is_permissive))
+ goto drop;
+ if (qp->ibqp.qp_num > 1) {
+ 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_pkey(ibp,
+ pkey, sl,
+ src_qp, qp->ibqp.qp_num,
+ slid, dlid);
+ return;
+ }
+ } else {
+ /* GSI packet */
+ mgmt_pkey_idx = hfi1_lookup_pkey_idx(ibp, pkey);
+ if (mgmt_pkey_idx < 0)
+ goto drop;
+ }
+ if (unlikely(l4 != OPA_16B_L4_FM &&
+ ib_get_qkey(packet->ohdr) != qp->qkey))
+ return; /* Silent drop */
+
+ /* Drop invalid MAD packets (see 13.5.3.1). */
+ if (unlikely(qp->ibqp.qp_num == 1 &&
+ (tlen > 2048 || (sc5 == 0xF))))
+ goto drop;
+ } else {
+ /* Received on QP0, and so by definition, this is an SMP */
+ struct opa_smp *smp = (struct opa_smp *)data;
+
+ if (opa_smp_check(ibp, pkey, sc5, qp, slid, smp))
+ goto drop;
+
+ if (tlen > 2048)
+ goto drop;
+ if ((dlid_is_permissive || slid_is_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 = packet->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 = rvt_get_rwqe(qp, false);
+ if (ret < 0) {
+ rvt_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 (packet->grh) {
+ hfi1_copy_sge(&qp->r_sge, packet->grh,
+ sizeof(struct ib_grh), true, false);
+ wc.wc_flags |= IB_WC_GRH;
+ } else if (packet->etype == RHF_RCV_TYPE_BYPASS) {
+ struct ib_grh grh;
+ /*
+ * Assuming we only created 16B on the send side
+ * if we want to use large LIDs, since GRH was stripped
+ * out when creating 16B, add back the GRH here.
+ */
+ hfi1_make_ext_grh(packet, &grh, slid, dlid);
+ hfi1_copy_sge(&qp->r_sge, &grh,
+ sizeof(struct ib_grh), true, false);
+ wc.wc_flags |= IB_WC_GRH;
+ } else {
+ rvt_skip_sge(&qp->r_sge, sizeof(struct ib_grh), true);
+ }
+ hfi1_copy_sge(&qp->r_sge, data, wc.byte_len - sizeof(struct ib_grh),
+ true, false);
+ 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_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;
+ }
+ if (slid_is_permissive)
+ slid = be32_to_cpu(OPA_LID_PERMISSIVE);
+ wc.slid = slid & U16_MAX;
+ wc.sl = sl_from_sc;
+
+ /*
+ * Save the LMC lower bits if the destination LID is a unicast LID.
+ */
+ wc.dlid_path_bits = hfi1_check_mcast(dlid) ? 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, solicited);
+ return;
+
+drop:
+ ibp->rvp.n_pkt_drops++;
+}