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https://github.com/edk2-porting/linux-next.git
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7d7632add8
The counters, unicast_xmit, unicast_rcv, multicast_xmit, multicast_rcv are now maintained as percpu variables. The mad code is modified to add a z_ latch so that the percpu counters monotonically increase with appropriate adjustments in the reset, read logic to maintain the z_ latch. This patch also corrects the fact the unitcast_xmit wasn't handled at all for UC and RC QPs. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
820 lines
22 KiB
C
820 lines
22 KiB
C
/*
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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
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* 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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#include <linux/spinlock.h>
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#include "qib.h"
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#include "qib_mad.h"
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/*
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* Convert the AETH RNR timeout code into the number of microseconds.
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*/
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const u32 ib_qib_rnr_table[32] = {
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655360, /* 00: 655.36 */
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10, /* 01: .01 */
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20, /* 02 .02 */
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30, /* 03: .03 */
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40, /* 04: .04 */
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60, /* 05: .06 */
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80, /* 06: .08 */
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120, /* 07: .12 */
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160, /* 08: .16 */
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240, /* 09: .24 */
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320, /* 0A: .32 */
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480, /* 0B: .48 */
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640, /* 0C: .64 */
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960, /* 0D: .96 */
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1280, /* 0E: 1.28 */
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1920, /* 0F: 1.92 */
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2560, /* 10: 2.56 */
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3840, /* 11: 3.84 */
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5120, /* 12: 5.12 */
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7680, /* 13: 7.68 */
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10240, /* 14: 10.24 */
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15360, /* 15: 15.36 */
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20480, /* 16: 20.48 */
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30720, /* 17: 30.72 */
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40960, /* 18: 40.96 */
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61440, /* 19: 61.44 */
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81920, /* 1A: 81.92 */
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122880, /* 1B: 122.88 */
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163840, /* 1C: 163.84 */
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245760, /* 1D: 245.76 */
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327680, /* 1E: 327.68 */
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491520 /* 1F: 491.52 */
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};
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/*
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* Validate a RWQE and fill in the SGE state.
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* Return 1 if OK.
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*/
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static int qib_init_sge(struct qib_qp *qp, struct qib_rwqe *wqe)
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{
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int i, j, ret;
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struct ib_wc wc;
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struct qib_lkey_table *rkt;
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struct qib_pd *pd;
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struct qib_sge_state *ss;
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rkt = &to_idev(qp->ibqp.device)->lk_table;
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pd = to_ipd(qp->ibqp.srq ? qp->ibqp.srq->pd : qp->ibqp.pd);
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ss = &qp->r_sge;
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ss->sg_list = qp->r_sg_list;
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qp->r_len = 0;
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for (i = j = 0; i < wqe->num_sge; i++) {
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if (wqe->sg_list[i].length == 0)
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continue;
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/* Check LKEY */
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if (!qib_lkey_ok(rkt, pd, j ? &ss->sg_list[j - 1] : &ss->sge,
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&wqe->sg_list[i], IB_ACCESS_LOCAL_WRITE))
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goto bad_lkey;
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qp->r_len += wqe->sg_list[i].length;
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j++;
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}
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ss->num_sge = j;
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ss->total_len = qp->r_len;
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ret = 1;
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goto bail;
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bad_lkey:
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while (j) {
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struct qib_sge *sge = --j ? &ss->sg_list[j - 1] : &ss->sge;
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qib_put_mr(sge->mr);
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}
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ss->num_sge = 0;
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memset(&wc, 0, sizeof(wc));
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wc.wr_id = wqe->wr_id;
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wc.status = IB_WC_LOC_PROT_ERR;
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wc.opcode = IB_WC_RECV;
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wc.qp = &qp->ibqp;
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/* Signal solicited completion event. */
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qib_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
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ret = 0;
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bail:
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return ret;
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}
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/**
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* qib_get_rwqe - copy the next RWQE into the QP's RWQE
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* @qp: the QP
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* @wr_id_only: update qp->r_wr_id only, not qp->r_sge
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*
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* Return -1 if there is a local error, 0 if no RWQE is available,
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* otherwise return 1.
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*
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* Can be called from interrupt level.
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*/
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int qib_get_rwqe(struct qib_qp *qp, int wr_id_only)
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{
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unsigned long flags;
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struct qib_rq *rq;
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struct qib_rwq *wq;
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struct qib_srq *srq;
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struct qib_rwqe *wqe;
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void (*handler)(struct ib_event *, void *);
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u32 tail;
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int ret;
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if (qp->ibqp.srq) {
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srq = to_isrq(qp->ibqp.srq);
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handler = srq->ibsrq.event_handler;
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rq = &srq->rq;
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} else {
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srq = NULL;
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handler = NULL;
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rq = &qp->r_rq;
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}
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spin_lock_irqsave(&rq->lock, flags);
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if (!(ib_qib_state_ops[qp->state] & QIB_PROCESS_RECV_OK)) {
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ret = 0;
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goto unlock;
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}
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wq = rq->wq;
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tail = wq->tail;
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/* Validate tail before using it since it is user writable. */
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if (tail >= rq->size)
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tail = 0;
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if (unlikely(tail == wq->head)) {
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ret = 0;
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goto unlock;
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}
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/* Make sure entry is read after head index is read. */
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smp_rmb();
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wqe = get_rwqe_ptr(rq, tail);
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/*
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* Even though we update the tail index in memory, the verbs
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* consumer is not supposed to post more entries until a
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* completion is generated.
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*/
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if (++tail >= rq->size)
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tail = 0;
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wq->tail = tail;
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if (!wr_id_only && !qib_init_sge(qp, wqe)) {
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ret = -1;
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goto unlock;
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}
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qp->r_wr_id = wqe->wr_id;
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ret = 1;
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set_bit(QIB_R_WRID_VALID, &qp->r_aflags);
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if (handler) {
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u32 n;
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/*
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* Validate head pointer value and compute
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* the number of remaining WQEs.
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*/
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n = wq->head;
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if (n >= rq->size)
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n = 0;
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if (n < tail)
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n += rq->size - tail;
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else
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n -= tail;
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if (n < srq->limit) {
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struct ib_event ev;
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srq->limit = 0;
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spin_unlock_irqrestore(&rq->lock, flags);
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ev.device = qp->ibqp.device;
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ev.element.srq = qp->ibqp.srq;
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ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
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handler(&ev, srq->ibsrq.srq_context);
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goto bail;
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}
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}
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unlock:
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spin_unlock_irqrestore(&rq->lock, flags);
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bail:
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return ret;
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}
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/*
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* Switch to alternate path.
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* The QP s_lock should be held and interrupts disabled.
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*/
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void qib_migrate_qp(struct qib_qp *qp)
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{
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struct ib_event ev;
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qp->s_mig_state = IB_MIG_MIGRATED;
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qp->remote_ah_attr = qp->alt_ah_attr;
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qp->port_num = qp->alt_ah_attr.port_num;
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qp->s_pkey_index = qp->s_alt_pkey_index;
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ev.device = qp->ibqp.device;
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ev.element.qp = &qp->ibqp;
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ev.event = IB_EVENT_PATH_MIG;
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qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
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}
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static __be64 get_sguid(struct qib_ibport *ibp, unsigned index)
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{
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if (!index) {
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struct qib_pportdata *ppd = ppd_from_ibp(ibp);
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return ppd->guid;
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} else
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return ibp->guids[index - 1];
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}
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static int gid_ok(union ib_gid *gid, __be64 gid_prefix, __be64 id)
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{
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return (gid->global.interface_id == id &&
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(gid->global.subnet_prefix == gid_prefix ||
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gid->global.subnet_prefix == IB_DEFAULT_GID_PREFIX));
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}
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/*
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*
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* This should be called with the QP r_lock held.
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*
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* The s_lock will be acquired around the qib_migrate_qp() call.
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*/
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int qib_ruc_check_hdr(struct qib_ibport *ibp, struct qib_ib_header *hdr,
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int has_grh, struct qib_qp *qp, u32 bth0)
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{
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__be64 guid;
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unsigned long flags;
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if (qp->s_mig_state == IB_MIG_ARMED && (bth0 & IB_BTH_MIG_REQ)) {
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if (!has_grh) {
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if (qp->alt_ah_attr.ah_flags & IB_AH_GRH)
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goto err;
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} else {
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if (!(qp->alt_ah_attr.ah_flags & IB_AH_GRH))
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goto err;
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guid = get_sguid(ibp, qp->alt_ah_attr.grh.sgid_index);
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if (!gid_ok(&hdr->u.l.grh.dgid, ibp->gid_prefix, guid))
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goto err;
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if (!gid_ok(&hdr->u.l.grh.sgid,
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qp->alt_ah_attr.grh.dgid.global.subnet_prefix,
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qp->alt_ah_attr.grh.dgid.global.interface_id))
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goto err;
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}
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if (!qib_pkey_ok((u16)bth0,
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qib_get_pkey(ibp, qp->s_alt_pkey_index))) {
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qib_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_PKEY,
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(u16)bth0,
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(be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF,
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0, qp->ibqp.qp_num,
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hdr->lrh[3], hdr->lrh[1]);
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goto err;
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}
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/* Validate the SLID. See Ch. 9.6.1.5 and 17.2.8 */
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if (be16_to_cpu(hdr->lrh[3]) != qp->alt_ah_attr.dlid ||
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ppd_from_ibp(ibp)->port != qp->alt_ah_attr.port_num)
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goto err;
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spin_lock_irqsave(&qp->s_lock, flags);
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qib_migrate_qp(qp);
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spin_unlock_irqrestore(&qp->s_lock, flags);
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} else {
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if (!has_grh) {
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if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
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goto err;
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} else {
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if (!(qp->remote_ah_attr.ah_flags & IB_AH_GRH))
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goto err;
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guid = get_sguid(ibp,
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qp->remote_ah_attr.grh.sgid_index);
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if (!gid_ok(&hdr->u.l.grh.dgid, ibp->gid_prefix, guid))
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goto err;
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if (!gid_ok(&hdr->u.l.grh.sgid,
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qp->remote_ah_attr.grh.dgid.global.subnet_prefix,
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qp->remote_ah_attr.grh.dgid.global.interface_id))
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goto err;
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}
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if (!qib_pkey_ok((u16)bth0,
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qib_get_pkey(ibp, qp->s_pkey_index))) {
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qib_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_PKEY,
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(u16)bth0,
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(be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF,
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0, qp->ibqp.qp_num,
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hdr->lrh[3], hdr->lrh[1]);
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goto err;
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}
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/* Validate the SLID. See Ch. 9.6.1.5 */
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if (be16_to_cpu(hdr->lrh[3]) != qp->remote_ah_attr.dlid ||
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ppd_from_ibp(ibp)->port != qp->port_num)
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goto err;
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if (qp->s_mig_state == IB_MIG_REARM &&
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!(bth0 & IB_BTH_MIG_REQ))
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qp->s_mig_state = IB_MIG_ARMED;
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}
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return 0;
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err:
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return 1;
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}
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/**
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* qib_ruc_loopback - handle UC and RC lookback requests
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* @sqp: the sending QP
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*
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* This is called from qib_do_send() to
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* forward a WQE addressed to the same HCA.
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* Note that although we are single threaded due to the tasklet, we still
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* have to protect against post_send(). We don't have to worry about
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* receive interrupts since this is a connected protocol and all packets
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* will pass through here.
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*/
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static void qib_ruc_loopback(struct qib_qp *sqp)
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{
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struct qib_ibport *ibp = to_iport(sqp->ibqp.device, sqp->port_num);
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struct qib_qp *qp;
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struct qib_swqe *wqe;
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struct qib_sge *sge;
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unsigned long flags;
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struct ib_wc wc;
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u64 sdata;
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atomic64_t *maddr;
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enum ib_wc_status send_status;
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int release;
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int ret;
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/*
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* Note that we check the responder QP state after
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* checking the requester's state.
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*/
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qp = qib_lookup_qpn(ibp, sqp->remote_qpn);
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spin_lock_irqsave(&sqp->s_lock, flags);
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/* Return if we are already busy processing a work request. */
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if ((sqp->s_flags & (QIB_S_BUSY | QIB_S_ANY_WAIT)) ||
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!(ib_qib_state_ops[sqp->state] & QIB_PROCESS_OR_FLUSH_SEND))
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goto unlock;
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sqp->s_flags |= QIB_S_BUSY;
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again:
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if (sqp->s_last == sqp->s_head)
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goto clr_busy;
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wqe = get_swqe_ptr(sqp, sqp->s_last);
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/* Return if it is not OK to start a new work reqeust. */
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if (!(ib_qib_state_ops[sqp->state] & QIB_PROCESS_NEXT_SEND_OK)) {
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if (!(ib_qib_state_ops[sqp->state] & QIB_FLUSH_SEND))
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goto clr_busy;
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/* We are in the error state, flush the work request. */
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send_status = IB_WC_WR_FLUSH_ERR;
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goto flush_send;
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}
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/*
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* We can rely on the entry not changing without the s_lock
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* being held until we update s_last.
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* We increment s_cur to indicate s_last is in progress.
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*/
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if (sqp->s_last == sqp->s_cur) {
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if (++sqp->s_cur >= sqp->s_size)
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sqp->s_cur = 0;
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}
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spin_unlock_irqrestore(&sqp->s_lock, flags);
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if (!qp || !(ib_qib_state_ops[qp->state] & QIB_PROCESS_RECV_OK) ||
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qp->ibqp.qp_type != sqp->ibqp.qp_type) {
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ibp->n_pkt_drops++;
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/*
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* For RC, the requester would timeout and retry so
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* shortcut the timeouts and just signal too many retries.
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*/
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if (sqp->ibqp.qp_type == IB_QPT_RC)
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send_status = IB_WC_RETRY_EXC_ERR;
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else
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send_status = IB_WC_SUCCESS;
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goto serr;
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}
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memset(&wc, 0, sizeof wc);
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send_status = IB_WC_SUCCESS;
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release = 1;
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sqp->s_sge.sge = wqe->sg_list[0];
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sqp->s_sge.sg_list = wqe->sg_list + 1;
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sqp->s_sge.num_sge = wqe->wr.num_sge;
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sqp->s_len = wqe->length;
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switch (wqe->wr.opcode) {
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case IB_WR_SEND_WITH_IMM:
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wc.wc_flags = IB_WC_WITH_IMM;
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wc.ex.imm_data = wqe->wr.ex.imm_data;
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/* FALLTHROUGH */
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case IB_WR_SEND:
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ret = qib_get_rwqe(qp, 0);
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if (ret < 0)
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goto op_err;
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if (!ret)
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goto rnr_nak;
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break;
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case IB_WR_RDMA_WRITE_WITH_IMM:
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if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_WRITE)))
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goto inv_err;
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wc.wc_flags = IB_WC_WITH_IMM;
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wc.ex.imm_data = wqe->wr.ex.imm_data;
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ret = qib_get_rwqe(qp, 1);
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if (ret < 0)
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goto op_err;
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if (!ret)
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goto rnr_nak;
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/* FALLTHROUGH */
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case IB_WR_RDMA_WRITE:
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if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_WRITE)))
|
|
goto inv_err;
|
|
if (wqe->length == 0)
|
|
break;
|
|
if (unlikely(!qib_rkey_ok(qp, &qp->r_sge.sge, wqe->length,
|
|
wqe->wr.wr.rdma.remote_addr,
|
|
wqe->wr.wr.rdma.rkey,
|
|
IB_ACCESS_REMOTE_WRITE)))
|
|
goto acc_err;
|
|
qp->r_sge.sg_list = NULL;
|
|
qp->r_sge.num_sge = 1;
|
|
qp->r_sge.total_len = wqe->length;
|
|
break;
|
|
|
|
case IB_WR_RDMA_READ:
|
|
if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_READ)))
|
|
goto inv_err;
|
|
if (unlikely(!qib_rkey_ok(qp, &sqp->s_sge.sge, wqe->length,
|
|
wqe->wr.wr.rdma.remote_addr,
|
|
wqe->wr.wr.rdma.rkey,
|
|
IB_ACCESS_REMOTE_READ)))
|
|
goto acc_err;
|
|
release = 0;
|
|
sqp->s_sge.sg_list = NULL;
|
|
sqp->s_sge.num_sge = 1;
|
|
qp->r_sge.sge = wqe->sg_list[0];
|
|
qp->r_sge.sg_list = wqe->sg_list + 1;
|
|
qp->r_sge.num_sge = wqe->wr.num_sge;
|
|
qp->r_sge.total_len = wqe->length;
|
|
break;
|
|
|
|
case IB_WR_ATOMIC_CMP_AND_SWP:
|
|
case IB_WR_ATOMIC_FETCH_AND_ADD:
|
|
if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_ATOMIC)))
|
|
goto inv_err;
|
|
if (unlikely(!qib_rkey_ok(qp, &qp->r_sge.sge, sizeof(u64),
|
|
wqe->wr.wr.atomic.remote_addr,
|
|
wqe->wr.wr.atomic.rkey,
|
|
IB_ACCESS_REMOTE_ATOMIC)))
|
|
goto acc_err;
|
|
/* Perform atomic OP and save result. */
|
|
maddr = (atomic64_t *) qp->r_sge.sge.vaddr;
|
|
sdata = wqe->wr.wr.atomic.compare_add;
|
|
*(u64 *) sqp->s_sge.sge.vaddr =
|
|
(wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD) ?
|
|
(u64) atomic64_add_return(sdata, maddr) - sdata :
|
|
(u64) cmpxchg((u64 *) qp->r_sge.sge.vaddr,
|
|
sdata, wqe->wr.wr.atomic.swap);
|
|
qib_put_mr(qp->r_sge.sge.mr);
|
|
qp->r_sge.num_sge = 0;
|
|
goto send_comp;
|
|
|
|
default:
|
|
send_status = IB_WC_LOC_QP_OP_ERR;
|
|
goto serr;
|
|
}
|
|
|
|
sge = &sqp->s_sge.sge;
|
|
while (sqp->s_len) {
|
|
u32 len = sqp->s_len;
|
|
|
|
if (len > sge->length)
|
|
len = sge->length;
|
|
if (len > sge->sge_length)
|
|
len = sge->sge_length;
|
|
BUG_ON(len == 0);
|
|
qib_copy_sge(&qp->r_sge, sge->vaddr, len, release);
|
|
sge->vaddr += len;
|
|
sge->length -= len;
|
|
sge->sge_length -= len;
|
|
if (sge->sge_length == 0) {
|
|
if (!release)
|
|
qib_put_mr(sge->mr);
|
|
if (--sqp->s_sge.num_sge)
|
|
*sge = *sqp->s_sge.sg_list++;
|
|
} else if (sge->length == 0 && sge->mr->lkey) {
|
|
if (++sge->n >= QIB_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;
|
|
}
|
|
sqp->s_len -= len;
|
|
}
|
|
if (release)
|
|
qib_put_ss(&qp->r_sge);
|
|
|
|
if (!test_and_clear_bit(QIB_R_WRID_VALID, &qp->r_aflags))
|
|
goto send_comp;
|
|
|
|
if (wqe->wr.opcode == IB_WR_RDMA_WRITE_WITH_IMM)
|
|
wc.opcode = IB_WC_RECV_RDMA_WITH_IMM;
|
|
else
|
|
wc.opcode = IB_WC_RECV;
|
|
wc.wr_id = qp->r_wr_id;
|
|
wc.status = IB_WC_SUCCESS;
|
|
wc.byte_len = wqe->length;
|
|
wc.qp = &qp->ibqp;
|
|
wc.src_qp = qp->remote_qpn;
|
|
wc.slid = qp->remote_ah_attr.dlid;
|
|
wc.sl = qp->remote_ah_attr.sl;
|
|
wc.port_num = 1;
|
|
/* Signal completion event if the solicited bit is set. */
|
|
qib_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
|
|
wqe->wr.send_flags & IB_SEND_SOLICITED);
|
|
|
|
send_comp:
|
|
spin_lock_irqsave(&sqp->s_lock, flags);
|
|
ibp->n_loop_pkts++;
|
|
flush_send:
|
|
sqp->s_rnr_retry = sqp->s_rnr_retry_cnt;
|
|
qib_send_complete(sqp, wqe, send_status);
|
|
goto again;
|
|
|
|
rnr_nak:
|
|
/* Handle RNR NAK */
|
|
if (qp->ibqp.qp_type == IB_QPT_UC)
|
|
goto send_comp;
|
|
ibp->n_rnr_naks++;
|
|
/*
|
|
* Note: we don't need the s_lock held since the BUSY flag
|
|
* makes this single threaded.
|
|
*/
|
|
if (sqp->s_rnr_retry == 0) {
|
|
send_status = IB_WC_RNR_RETRY_EXC_ERR;
|
|
goto serr;
|
|
}
|
|
if (sqp->s_rnr_retry_cnt < 7)
|
|
sqp->s_rnr_retry--;
|
|
spin_lock_irqsave(&sqp->s_lock, flags);
|
|
if (!(ib_qib_state_ops[sqp->state] & QIB_PROCESS_RECV_OK))
|
|
goto clr_busy;
|
|
sqp->s_flags |= QIB_S_WAIT_RNR;
|
|
sqp->s_timer.function = qib_rc_rnr_retry;
|
|
sqp->s_timer.expires = jiffies +
|
|
usecs_to_jiffies(ib_qib_rnr_table[qp->r_min_rnr_timer]);
|
|
add_timer(&sqp->s_timer);
|
|
goto clr_busy;
|
|
|
|
op_err:
|
|
send_status = IB_WC_REM_OP_ERR;
|
|
wc.status = IB_WC_LOC_QP_OP_ERR;
|
|
goto err;
|
|
|
|
inv_err:
|
|
send_status = IB_WC_REM_INV_REQ_ERR;
|
|
wc.status = IB_WC_LOC_QP_OP_ERR;
|
|
goto err;
|
|
|
|
acc_err:
|
|
send_status = IB_WC_REM_ACCESS_ERR;
|
|
wc.status = IB_WC_LOC_PROT_ERR;
|
|
err:
|
|
/* responder goes to error state */
|
|
qib_rc_error(qp, wc.status);
|
|
|
|
serr:
|
|
spin_lock_irqsave(&sqp->s_lock, flags);
|
|
qib_send_complete(sqp, wqe, send_status);
|
|
if (sqp->ibqp.qp_type == IB_QPT_RC) {
|
|
int lastwqe = qib_error_qp(sqp, IB_WC_WR_FLUSH_ERR);
|
|
|
|
sqp->s_flags &= ~QIB_S_BUSY;
|
|
spin_unlock_irqrestore(&sqp->s_lock, flags);
|
|
if (lastwqe) {
|
|
struct ib_event ev;
|
|
|
|
ev.device = sqp->ibqp.device;
|
|
ev.element.qp = &sqp->ibqp;
|
|
ev.event = IB_EVENT_QP_LAST_WQE_REACHED;
|
|
sqp->ibqp.event_handler(&ev, sqp->ibqp.qp_context);
|
|
}
|
|
goto done;
|
|
}
|
|
clr_busy:
|
|
sqp->s_flags &= ~QIB_S_BUSY;
|
|
unlock:
|
|
spin_unlock_irqrestore(&sqp->s_lock, flags);
|
|
done:
|
|
if (qp && atomic_dec_and_test(&qp->refcount))
|
|
wake_up(&qp->wait);
|
|
}
|
|
|
|
/**
|
|
* qib_make_grh - construct a GRH header
|
|
* @ibp: a pointer to the IB port
|
|
* @hdr: a pointer to the GRH header being constructed
|
|
* @grh: the global route address to send to
|
|
* @hwords: the number of 32 bit words of header being sent
|
|
* @nwords: the number of 32 bit words of data being sent
|
|
*
|
|
* Return the size of the header in 32 bit words.
|
|
*/
|
|
u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr,
|
|
struct ib_global_route *grh, u32 hwords, u32 nwords)
|
|
{
|
|
hdr->version_tclass_flow =
|
|
cpu_to_be32((IB_GRH_VERSION << IB_GRH_VERSION_SHIFT) |
|
|
(grh->traffic_class << IB_GRH_TCLASS_SHIFT) |
|
|
(grh->flow_label << IB_GRH_FLOW_SHIFT));
|
|
hdr->paylen = cpu_to_be16((hwords - 2 + nwords + SIZE_OF_CRC) << 2);
|
|
/* next_hdr is defined by C8-7 in ch. 8.4.1 */
|
|
hdr->next_hdr = IB_GRH_NEXT_HDR;
|
|
hdr->hop_limit = grh->hop_limit;
|
|
/* The SGID is 32-bit aligned. */
|
|
hdr->sgid.global.subnet_prefix = ibp->gid_prefix;
|
|
hdr->sgid.global.interface_id = grh->sgid_index ?
|
|
ibp->guids[grh->sgid_index - 1] : ppd_from_ibp(ibp)->guid;
|
|
hdr->dgid = grh->dgid;
|
|
|
|
/* GRH header size in 32-bit words. */
|
|
return sizeof(struct ib_grh) / sizeof(u32);
|
|
}
|
|
|
|
void qib_make_ruc_header(struct qib_qp *qp, struct qib_other_headers *ohdr,
|
|
u32 bth0, u32 bth2)
|
|
{
|
|
struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
|
|
u16 lrh0;
|
|
u32 nwords;
|
|
u32 extra_bytes;
|
|
|
|
/* Construct the header. */
|
|
extra_bytes = -qp->s_cur_size & 3;
|
|
nwords = (qp->s_cur_size + extra_bytes) >> 2;
|
|
lrh0 = QIB_LRH_BTH;
|
|
if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
|
|
qp->s_hdrwords += qib_make_grh(ibp, &qp->s_hdr->u.l.grh,
|
|
&qp->remote_ah_attr.grh,
|
|
qp->s_hdrwords, nwords);
|
|
lrh0 = QIB_LRH_GRH;
|
|
}
|
|
lrh0 |= ibp->sl_to_vl[qp->remote_ah_attr.sl] << 12 |
|
|
qp->remote_ah_attr.sl << 4;
|
|
qp->s_hdr->lrh[0] = cpu_to_be16(lrh0);
|
|
qp->s_hdr->lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
|
|
qp->s_hdr->lrh[2] = cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC);
|
|
qp->s_hdr->lrh[3] = cpu_to_be16(ppd_from_ibp(ibp)->lid |
|
|
qp->remote_ah_attr.src_path_bits);
|
|
bth0 |= qib_get_pkey(ibp, qp->s_pkey_index);
|
|
bth0 |= extra_bytes << 20;
|
|
if (qp->s_mig_state == IB_MIG_MIGRATED)
|
|
bth0 |= IB_BTH_MIG_REQ;
|
|
ohdr->bth[0] = cpu_to_be32(bth0);
|
|
ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
|
|
ohdr->bth[2] = cpu_to_be32(bth2);
|
|
this_cpu_inc(ibp->pmastats->n_unicast_xmit);
|
|
}
|
|
|
|
/**
|
|
* qib_do_send - perform a send on a QP
|
|
* @work: contains a pointer to the QP
|
|
*
|
|
* Process entries in the send work queue until credit or queue is
|
|
* exhausted. Only allow one CPU to send a packet per QP (tasklet).
|
|
* Otherwise, two threads could send packets out of order.
|
|
*/
|
|
void qib_do_send(struct work_struct *work)
|
|
{
|
|
struct qib_qp *qp = container_of(work, struct qib_qp, s_work);
|
|
struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
|
|
struct qib_pportdata *ppd = ppd_from_ibp(ibp);
|
|
int (*make_req)(struct qib_qp *qp);
|
|
unsigned long flags;
|
|
|
|
if ((qp->ibqp.qp_type == IB_QPT_RC ||
|
|
qp->ibqp.qp_type == IB_QPT_UC) &&
|
|
(qp->remote_ah_attr.dlid & ~((1 << ppd->lmc) - 1)) == ppd->lid) {
|
|
qib_ruc_loopback(qp);
|
|
return;
|
|
}
|
|
|
|
if (qp->ibqp.qp_type == IB_QPT_RC)
|
|
make_req = qib_make_rc_req;
|
|
else if (qp->ibqp.qp_type == IB_QPT_UC)
|
|
make_req = qib_make_uc_req;
|
|
else
|
|
make_req = qib_make_ud_req;
|
|
|
|
spin_lock_irqsave(&qp->s_lock, flags);
|
|
|
|
/* Return if we are already busy processing a work request. */
|
|
if (!qib_send_ok(qp)) {
|
|
spin_unlock_irqrestore(&qp->s_lock, flags);
|
|
return;
|
|
}
|
|
|
|
qp->s_flags |= QIB_S_BUSY;
|
|
|
|
spin_unlock_irqrestore(&qp->s_lock, flags);
|
|
|
|
do {
|
|
/* Check for a constructed packet to be sent. */
|
|
if (qp->s_hdrwords != 0) {
|
|
/*
|
|
* If the packet cannot be sent now, return and
|
|
* the send tasklet will be woken up later.
|
|
*/
|
|
if (qib_verbs_send(qp, qp->s_hdr, qp->s_hdrwords,
|
|
qp->s_cur_sge, qp->s_cur_size))
|
|
break;
|
|
/* Record that s_hdr is empty. */
|
|
qp->s_hdrwords = 0;
|
|
}
|
|
} while (make_req(qp));
|
|
}
|
|
|
|
/*
|
|
* This should be called with s_lock held.
|
|
*/
|
|
void qib_send_complete(struct qib_qp *qp, struct qib_swqe *wqe,
|
|
enum ib_wc_status status)
|
|
{
|
|
u32 old_last, last;
|
|
unsigned i;
|
|
|
|
if (!(ib_qib_state_ops[qp->state] & QIB_PROCESS_OR_FLUSH_SEND))
|
|
return;
|
|
|
|
for (i = 0; i < wqe->wr.num_sge; i++) {
|
|
struct qib_sge *sge = &wqe->sg_list[i];
|
|
|
|
qib_put_mr(sge->mr);
|
|
}
|
|
if (qp->ibqp.qp_type == IB_QPT_UD ||
|
|
qp->ibqp.qp_type == IB_QPT_SMI ||
|
|
qp->ibqp.qp_type == IB_QPT_GSI)
|
|
atomic_dec(&to_iah(wqe->wr.wr.ud.ah)->refcount);
|
|
|
|
/* See ch. 11.2.4.1 and 10.7.3.1 */
|
|
if (!(qp->s_flags & QIB_S_SIGNAL_REQ_WR) ||
|
|
(wqe->wr.send_flags & IB_SEND_SIGNALED) ||
|
|
status != IB_WC_SUCCESS) {
|
|
struct ib_wc wc;
|
|
|
|
memset(&wc, 0, sizeof wc);
|
|
wc.wr_id = wqe->wr.wr_id;
|
|
wc.status = status;
|
|
wc.opcode = ib_qib_wc_opcode[wqe->wr.opcode];
|
|
wc.qp = &qp->ibqp;
|
|
if (status == IB_WC_SUCCESS)
|
|
wc.byte_len = wqe->length;
|
|
qib_cq_enter(to_icq(qp->ibqp.send_cq), &wc,
|
|
status != IB_WC_SUCCESS);
|
|
}
|
|
|
|
last = qp->s_last;
|
|
old_last = last;
|
|
if (++last >= qp->s_size)
|
|
last = 0;
|
|
qp->s_last = last;
|
|
if (qp->s_acked == old_last)
|
|
qp->s_acked = last;
|
|
if (qp->s_cur == old_last)
|
|
qp->s_cur = last;
|
|
if (qp->s_tail == old_last)
|
|
qp->s_tail = last;
|
|
if (qp->state == IB_QPS_SQD && last == qp->s_cur)
|
|
qp->s_draining = 0;
|
|
}
|