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583 lines
16 KiB
583 lines
16 KiB
/* |
|
* Copyright (c) 2012 - 2019 Intel Corporation. All rights reserved. |
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* Copyright (c) 2006, 2007, 2008, 2009 QLogic Corporation. All rights reserved. |
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* Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
|
* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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|
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#include <rdma/ib_smi.h> |
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#include <rdma/ib_verbs.h> |
|
|
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#include "qib.h" |
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#include "qib_mad.h" |
|
|
|
/** |
|
* qib_ud_loopback - handle send on loopback QPs |
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* @sqp: the sending QP |
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* @swqe: the send work request |
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* |
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* This is called from qib_make_ud_req() to forward a WQE addressed |
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* to the same HCA. |
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* Note that the receive interrupt handler may be calling qib_ud_rcv() |
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* while this is being called. |
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*/ |
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static void qib_ud_loopback(struct rvt_qp *sqp, struct rvt_swqe *swqe) |
|
{ |
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struct qib_ibport *ibp = to_iport(sqp->ibqp.device, sqp->port_num); |
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struct qib_pportdata *ppd = ppd_from_ibp(ibp); |
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struct qib_devdata *dd = ppd->dd; |
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struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; |
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struct rvt_qp *qp; |
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struct rdma_ah_attr *ah_attr; |
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unsigned long flags; |
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struct rvt_sge_state ssge; |
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struct rvt_sge *sge; |
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struct ib_wc wc; |
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u32 length; |
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enum ib_qp_type sqptype, dqptype; |
|
|
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rcu_read_lock(); |
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qp = rvt_lookup_qpn(rdi, &ibp->rvp, rvt_get_swqe_remote_qpn(swqe)); |
|
if (!qp) { |
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ibp->rvp.n_pkt_drops++; |
|
goto drop; |
|
} |
|
|
|
sqptype = sqp->ibqp.qp_type == IB_QPT_GSI ? |
|
IB_QPT_UD : sqp->ibqp.qp_type; |
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dqptype = qp->ibqp.qp_type == IB_QPT_GSI ? |
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IB_QPT_UD : qp->ibqp.qp_type; |
|
|
|
if (dqptype != sqptype || |
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!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) { |
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ibp->rvp.n_pkt_drops++; |
|
goto drop; |
|
} |
|
|
|
ah_attr = rvt_get_swqe_ah_attr(swqe); |
|
ppd = ppd_from_ibp(ibp); |
|
|
|
if (qp->ibqp.qp_num > 1) { |
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u16 pkey1; |
|
u16 pkey2; |
|
u16 lid; |
|
|
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pkey1 = qib_get_pkey(ibp, sqp->s_pkey_index); |
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pkey2 = qib_get_pkey(ibp, qp->s_pkey_index); |
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if (unlikely(!qib_pkey_ok(pkey1, pkey2))) { |
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lid = ppd->lid | (rdma_ah_get_path_bits(ah_attr) & |
|
((1 << ppd->lmc) - 1)); |
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qib_bad_pkey(ibp, pkey1, |
|
rdma_ah_get_sl(ah_attr), |
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sqp->ibqp.qp_num, qp->ibqp.qp_num, |
|
cpu_to_be16(lid), |
|
cpu_to_be16(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). |
|
*/ |
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if (qp->ibqp.qp_num) { |
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u32 qkey; |
|
|
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qkey = (int)rvt_get_swqe_remote_qkey(swqe) < 0 ? |
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sqp->qkey : rvt_get_swqe_remote_qkey(swqe); |
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if (unlikely(qkey != qp->qkey)) |
|
goto drop; |
|
} |
|
|
|
/* |
|
* A GRH is expected to precede the data even if not |
|
* present on the wire. |
|
*/ |
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length = swqe->length; |
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memset(&wc, 0, sizeof(wc)); |
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wc.byte_len = length + sizeof(struct ib_grh); |
|
|
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if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) { |
|
wc.wc_flags = IB_WC_WITH_IMM; |
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wc.ex.imm_data = swqe->wr.ex.imm_data; |
|
} |
|
|
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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) |
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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; |
|
const struct ib_global_route *grd = rdma_ah_read_grh(ah_attr); |
|
|
|
qib_make_grh(ibp, &grh, grd, 0, 0); |
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rvt_copy_sge(qp, &qp->r_sge, &grh, |
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sizeof(grh), true, false); |
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wc.wc_flags |= IB_WC_GRH; |
|
} else |
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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) { |
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u32 len = rvt_get_sge_length(sge, length); |
|
|
|
rvt_copy_sge(qp, &qp->r_sge, sge->vaddr, len, true, false); |
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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 = |
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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; |
|
wc.pkey_index = qp->ibqp.qp_type == IB_QPT_GSI ? |
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rvt_get_swqe_pkey_index(swqe) : 0; |
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wc.slid = ppd->lid | (rdma_ah_get_path_bits(ah_attr) & |
|
((1 << ppd->lmc) - 1)); |
|
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_recv_cq(qp, &wc, swqe->wr.send_flags & IB_SEND_SOLICITED); |
|
ibp->rvp.n_loop_pkts++; |
|
bail_unlock: |
|
spin_unlock_irqrestore(&qp->r_lock, flags); |
|
drop: |
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rcu_read_unlock(); |
|
} |
|
|
|
/** |
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* qib_make_ud_req - construct a UD request packet |
|
* @qp: the QP |
|
* @flags: flags to modify and pass back to caller |
|
* |
|
* Assumes the s_lock is held. |
|
* |
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* Return 1 if constructed; otherwise, return 0. |
|
*/ |
|
int qib_make_ud_req(struct rvt_qp *qp, unsigned long *flags) |
|
{ |
|
struct qib_qp_priv *priv = qp->priv; |
|
struct ib_other_headers *ohdr; |
|
struct rdma_ah_attr *ah_attr; |
|
struct qib_pportdata *ppd; |
|
struct qib_ibport *ibp; |
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struct rvt_swqe *wqe; |
|
u32 nwords; |
|
u32 extra_bytes; |
|
u32 bth0; |
|
u16 lrh0; |
|
u16 lid; |
|
int ret = 0; |
|
int next_cur; |
|
|
|
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; |
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/* If DMAs are in progress, we can't flush immediately. */ |
|
if (atomic_read(&priv->s_dma_busy)) { |
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qp->s_flags |= RVT_S_WAIT_DMA; |
|
goto bail; |
|
} |
|
wqe = rvt_get_swqe_ptr(qp, qp->s_last); |
|
rvt_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); |
|
goto done; |
|
} |
|
|
|
/* 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 = rvt_get_swqe_ah_attr(wqe); |
|
if (rdma_ah_get_dlid(ah_attr) >= be16_to_cpu(IB_MULTICAST_LID_BASE)) { |
|
if (rdma_ah_get_dlid(ah_attr) != |
|
be16_to_cpu(IB_LID_PERMISSIVE)) |
|
this_cpu_inc(ibp->pmastats->n_multicast_xmit); |
|
else |
|
this_cpu_inc(ibp->pmastats->n_unicast_xmit); |
|
} else { |
|
this_cpu_inc(ibp->pmastats->n_unicast_xmit); |
|
lid = rdma_ah_get_dlid(ah_attr) & ~((1 << ppd->lmc) - 1); |
|
if (unlikely(lid == ppd->lid)) { |
|
unsigned long tflags = *flags; |
|
/* |
|
* If DMAs are in progress, we can't generate |
|
* a completion for the loopback packet since |
|
* it would be out of order. |
|
* XXX Instead of waiting, we could queue a |
|
* zero length descriptor so we get a callback. |
|
*/ |
|
if (atomic_read(&priv->s_dma_busy)) { |
|
qp->s_flags |= RVT_S_WAIT_DMA; |
|
goto bail; |
|
} |
|
qp->s_cur = next_cur; |
|
spin_unlock_irqrestore(&qp->s_lock, tflags); |
|
qib_ud_loopback(qp, wqe); |
|
spin_lock_irqsave(&qp->s_lock, tflags); |
|
*flags = tflags; |
|
rvt_send_complete(qp, wqe, IB_WC_SUCCESS); |
|
goto done; |
|
} |
|
} |
|
|
|
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 = rdma_ah_get_static_rate(ah_attr); |
|
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 (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) { |
|
/* Header size in 32-bit words. */ |
|
qp->s_hdrwords += qib_make_grh(ibp, &priv->s_hdr->u.l.grh, |
|
rdma_ah_read_grh(ah_attr), |
|
qp->s_hdrwords, nwords); |
|
lrh0 = QIB_LRH_GRH; |
|
ohdr = &priv->s_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 = QIB_LRH_BTH; |
|
ohdr = &priv->s_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; |
|
lrh0 |= rdma_ah_get_sl(ah_attr) << 4; |
|
if (qp->ibqp.qp_type == IB_QPT_SMI) |
|
lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */ |
|
else |
|
lrh0 |= ibp->sl_to_vl[rdma_ah_get_sl(ah_attr)] << 12; |
|
priv->s_hdr->lrh[0] = cpu_to_be16(lrh0); |
|
priv->s_hdr->lrh[1] = |
|
cpu_to_be16(rdma_ah_get_dlid(ah_attr)); /* DEST LID */ |
|
priv->s_hdr->lrh[2] = |
|
cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC); |
|
lid = ppd->lid; |
|
if (lid) { |
|
lid |= rdma_ah_get_path_bits(ah_attr) & |
|
((1 << ppd->lmc) - 1); |
|
priv->s_hdr->lrh[3] = cpu_to_be16(lid); |
|
} else |
|
priv->s_hdr->lrh[3] = IB_LID_PERMISSIVE; |
|
if (wqe->wr.send_flags & IB_SEND_SOLICITED) |
|
bth0 |= IB_BTH_SOLICITED; |
|
bth0 |= extra_bytes << 20; |
|
bth0 |= qp->ibqp.qp_type == IB_QPT_SMI ? QIB_DEFAULT_P_KEY : |
|
qib_get_pkey(ibp, qp->ibqp.qp_type == IB_QPT_GSI ? |
|
rvt_get_swqe_pkey_index(wqe) : qp->s_pkey_index); |
|
ohdr->bth[0] = cpu_to_be32(bth0); |
|
/* |
|
* Use the multicast QP if the destination LID is a multicast LID. |
|
*/ |
|
ohdr->bth[1] = rdma_ah_get_dlid(ah_attr) >= |
|
be16_to_cpu(IB_MULTICAST_LID_BASE) && |
|
rdma_ah_get_dlid(ah_attr) != be16_to_cpu(IB_LID_PERMISSIVE) ? |
|
cpu_to_be32(QIB_MULTICAST_QPN) : |
|
cpu_to_be32(rvt_get_swqe_remote_qpn(wqe)); |
|
ohdr->bth[2] = cpu_to_be32(wqe->psn & QIB_PSN_MASK); |
|
/* |
|
* 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)rvt_get_swqe_remote_qkey(wqe) < 0 ? qp->qkey : |
|
rvt_get_swqe_remote_qkey(wqe)); |
|
ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num); |
|
|
|
done: |
|
return 1; |
|
bail: |
|
qp->s_flags &= ~RVT_S_BUSY; |
|
return ret; |
|
} |
|
|
|
static unsigned qib_lookup_pkey(struct qib_ibport *ibp, u16 pkey) |
|
{ |
|
struct qib_pportdata *ppd = ppd_from_ibp(ibp); |
|
struct qib_devdata *dd = ppd->dd; |
|
unsigned ctxt = ppd->hw_pidx; |
|
unsigned i; |
|
|
|
pkey &= 0x7fff; /* remove limited/full membership bit */ |
|
|
|
for (i = 0; i < ARRAY_SIZE(dd->rcd[ctxt]->pkeys); ++i) |
|
if ((dd->rcd[ctxt]->pkeys[i] & 0x7fff) == pkey) |
|
return i; |
|
|
|
/* |
|
* Should not get here, this means hardware failed to validate pkeys. |
|
* Punt and return index 0. |
|
*/ |
|
return 0; |
|
} |
|
|
|
/** |
|
* qib_ud_rcv - receive an incoming UD packet |
|
* @ibp: the port the packet came in on |
|
* @hdr: the packet header |
|
* @has_grh: true if the packet has a GRH |
|
* @data: the packet data |
|
* @tlen: the packet length |
|
* @qp: the QP the packet came on |
|
* |
|
* This is called from qib_qp_rcv() to process an incoming UD packet |
|
* for the given QP. |
|
* Called at interrupt level. |
|
*/ |
|
void qib_ud_rcv(struct qib_ibport *ibp, struct ib_header *hdr, |
|
int has_grh, void *data, u32 tlen, struct rvt_qp *qp) |
|
{ |
|
struct ib_other_headers *ohdr; |
|
int opcode; |
|
u32 hdrsize; |
|
u32 pad; |
|
struct ib_wc wc; |
|
u32 qkey; |
|
u32 src_qp; |
|
u16 dlid; |
|
|
|
/* Check for GRH */ |
|
if (!has_grh) { |
|
ohdr = &hdr->u.oth; |
|
hdrsize = 8 + 12 + 8; /* LRH + BTH + DETH */ |
|
} else { |
|
ohdr = &hdr->u.l.oth; |
|
hdrsize = 8 + 40 + 12 + 8; /* LRH + GRH + BTH + DETH */ |
|
} |
|
qkey = be32_to_cpu(ohdr->u.ud.deth[0]); |
|
src_qp = be32_to_cpu(ohdr->u.ud.deth[1]) & RVT_QPN_MASK; |
|
|
|
/* |
|
* 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) { |
|
u16 pkey1, pkey2; |
|
|
|
pkey1 = be32_to_cpu(ohdr->bth[0]); |
|
pkey2 = qib_get_pkey(ibp, qp->s_pkey_index); |
|
if (unlikely(!qib_pkey_ok(pkey1, pkey2))) { |
|
qib_bad_pkey(ibp, |
|
pkey1, |
|
(be16_to_cpu(hdr->lrh[0]) >> 4) & |
|
0xF, |
|
src_qp, qp->ibqp.qp_num, |
|
hdr->lrh[3], hdr->lrh[1]); |
|
return; |
|
} |
|
} |
|
if (unlikely(qkey != qp->qkey)) |
|
return; |
|
|
|
/* Drop invalid MAD packets (see 13.5.3.1). */ |
|
if (unlikely(qp->ibqp.qp_num == 1 && |
|
(tlen != 256 || |
|
(be16_to_cpu(hdr->lrh[0]) >> 12) == 15))) |
|
goto drop; |
|
} else { |
|
struct ib_smp *smp; |
|
|
|
/* Drop invalid MAD packets (see 13.5.3.1). */ |
|
if (tlen != 256 || (be16_to_cpu(hdr->lrh[0]) >> 12) != 15) |
|
goto drop; |
|
smp = (struct ib_smp *) data; |
|
if ((hdr->lrh[1] == IB_LID_PERMISSIVE || |
|
hdr->lrh[3] == IB_LID_PERMISSIVE) && |
|
smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
|
goto drop; |
|
} |
|
|
|
/* |
|
* 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; |
|
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; |
|
} 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 (has_grh) { |
|
rvt_copy_sge(qp, &qp->r_sge, &hdr->u.l.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); |
|
rvt_copy_sge(qp, &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; |
|
wc.pkey_index = qp->ibqp.qp_type == IB_QPT_GSI ? |
|
qib_lookup_pkey(ibp, be32_to_cpu(ohdr->bth[0])) : 0; |
|
wc.slid = be16_to_cpu(hdr->lrh[3]); |
|
wc.sl = (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF; |
|
dlid = be16_to_cpu(hdr->lrh[1]); |
|
/* |
|
* 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_recv_cq(qp, &wc, ib_bth_is_solicited(ohdr)); |
|
return; |
|
|
|
drop: |
|
ibp->rvp.n_pkt_drops++; |
|
}
|
|
|