766 lines
19 KiB
C
766 lines
19 KiB
C
/*
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* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2015 System Fabric Works, 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/skbuff.h>
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#include <crypto/hash.h>
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#include "rxe.h"
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#include "rxe_loc.h"
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#include "rxe_queue.h"
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static int next_opcode(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
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u32 opcode);
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static inline void retry_first_write_send(struct rxe_qp *qp,
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struct rxe_send_wqe *wqe,
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unsigned int mask, int npsn)
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{
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int i;
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for (i = 0; i < npsn; i++) {
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int to_send = (wqe->dma.resid > qp->mtu) ?
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qp->mtu : wqe->dma.resid;
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qp->req.opcode = next_opcode(qp, wqe,
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wqe->wr.opcode);
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if (wqe->wr.send_flags & IB_SEND_INLINE) {
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wqe->dma.resid -= to_send;
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wqe->dma.sge_offset += to_send;
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} else {
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advance_dma_data(&wqe->dma, to_send);
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}
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if (mask & WR_WRITE_MASK)
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wqe->iova += qp->mtu;
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}
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}
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static void req_retry(struct rxe_qp *qp)
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{
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struct rxe_send_wqe *wqe;
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unsigned int wqe_index;
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unsigned int mask;
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int npsn;
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int first = 1;
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qp->req.wqe_index = consumer_index(qp->sq.queue);
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qp->req.psn = qp->comp.psn;
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qp->req.opcode = -1;
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for (wqe_index = consumer_index(qp->sq.queue);
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wqe_index != producer_index(qp->sq.queue);
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wqe_index = next_index(qp->sq.queue, wqe_index)) {
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wqe = addr_from_index(qp->sq.queue, wqe_index);
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mask = wr_opcode_mask(wqe->wr.opcode, qp);
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if (wqe->state == wqe_state_posted)
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break;
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if (wqe->state == wqe_state_done)
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continue;
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wqe->iova = (mask & WR_ATOMIC_MASK) ?
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wqe->wr.wr.atomic.remote_addr :
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(mask & WR_READ_OR_WRITE_MASK) ?
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wqe->wr.wr.rdma.remote_addr :
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0;
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if (!first || (mask & WR_READ_MASK) == 0) {
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wqe->dma.resid = wqe->dma.length;
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wqe->dma.cur_sge = 0;
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wqe->dma.sge_offset = 0;
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}
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if (first) {
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first = 0;
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if (mask & WR_WRITE_OR_SEND_MASK) {
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npsn = (qp->comp.psn - wqe->first_psn) &
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BTH_PSN_MASK;
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retry_first_write_send(qp, wqe, mask, npsn);
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}
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if (mask & WR_READ_MASK) {
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npsn = (wqe->dma.length - wqe->dma.resid) /
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qp->mtu;
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wqe->iova += npsn * qp->mtu;
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}
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}
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wqe->state = wqe_state_posted;
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}
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}
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void rnr_nak_timer(struct timer_list *t)
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{
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struct rxe_qp *qp = from_timer(qp, t, rnr_nak_timer);
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pr_debug("qp#%d rnr nak timer fired\n", qp_num(qp));
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rxe_run_task(&qp->req.task, 1);
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}
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static struct rxe_send_wqe *req_next_wqe(struct rxe_qp *qp)
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{
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struct rxe_send_wqe *wqe = queue_head(qp->sq.queue);
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unsigned long flags;
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if (unlikely(qp->req.state == QP_STATE_DRAIN)) {
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/* check to see if we are drained;
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* state_lock used by requester and completer
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*/
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spin_lock_irqsave(&qp->state_lock, flags);
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do {
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if (qp->req.state != QP_STATE_DRAIN) {
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/* comp just finished */
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spin_unlock_irqrestore(&qp->state_lock,
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flags);
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break;
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}
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if (wqe && ((qp->req.wqe_index !=
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consumer_index(qp->sq.queue)) ||
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(wqe->state != wqe_state_posted))) {
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/* comp not done yet */
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spin_unlock_irqrestore(&qp->state_lock,
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flags);
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break;
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}
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qp->req.state = QP_STATE_DRAINED;
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spin_unlock_irqrestore(&qp->state_lock, flags);
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if (qp->ibqp.event_handler) {
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struct ib_event ev;
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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_SQ_DRAINED;
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qp->ibqp.event_handler(&ev,
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qp->ibqp.qp_context);
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}
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} while (0);
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}
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if (qp->req.wqe_index == producer_index(qp->sq.queue))
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return NULL;
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wqe = addr_from_index(qp->sq.queue, qp->req.wqe_index);
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if (unlikely((qp->req.state == QP_STATE_DRAIN ||
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qp->req.state == QP_STATE_DRAINED) &&
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(wqe->state != wqe_state_processing)))
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return NULL;
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if (unlikely((wqe->wr.send_flags & IB_SEND_FENCE) &&
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(qp->req.wqe_index != consumer_index(qp->sq.queue)))) {
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qp->req.wait_fence = 1;
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return NULL;
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}
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wqe->mask = wr_opcode_mask(wqe->wr.opcode, qp);
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return wqe;
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}
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static int next_opcode_rc(struct rxe_qp *qp, u32 opcode, int fits)
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{
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switch (opcode) {
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case IB_WR_RDMA_WRITE:
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if (qp->req.opcode == IB_OPCODE_RC_RDMA_WRITE_FIRST ||
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qp->req.opcode == IB_OPCODE_RC_RDMA_WRITE_MIDDLE)
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return fits ?
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IB_OPCODE_RC_RDMA_WRITE_LAST :
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IB_OPCODE_RC_RDMA_WRITE_MIDDLE;
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else
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return fits ?
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IB_OPCODE_RC_RDMA_WRITE_ONLY :
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IB_OPCODE_RC_RDMA_WRITE_FIRST;
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case IB_WR_RDMA_WRITE_WITH_IMM:
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if (qp->req.opcode == IB_OPCODE_RC_RDMA_WRITE_FIRST ||
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qp->req.opcode == IB_OPCODE_RC_RDMA_WRITE_MIDDLE)
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return fits ?
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IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE :
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IB_OPCODE_RC_RDMA_WRITE_MIDDLE;
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else
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return fits ?
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IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE :
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IB_OPCODE_RC_RDMA_WRITE_FIRST;
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case IB_WR_SEND:
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if (qp->req.opcode == IB_OPCODE_RC_SEND_FIRST ||
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qp->req.opcode == IB_OPCODE_RC_SEND_MIDDLE)
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return fits ?
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IB_OPCODE_RC_SEND_LAST :
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IB_OPCODE_RC_SEND_MIDDLE;
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else
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return fits ?
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IB_OPCODE_RC_SEND_ONLY :
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IB_OPCODE_RC_SEND_FIRST;
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case IB_WR_SEND_WITH_IMM:
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if (qp->req.opcode == IB_OPCODE_RC_SEND_FIRST ||
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qp->req.opcode == IB_OPCODE_RC_SEND_MIDDLE)
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return fits ?
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IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE :
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IB_OPCODE_RC_SEND_MIDDLE;
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else
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return fits ?
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IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE :
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IB_OPCODE_RC_SEND_FIRST;
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case IB_WR_RDMA_READ:
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return IB_OPCODE_RC_RDMA_READ_REQUEST;
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case IB_WR_ATOMIC_CMP_AND_SWP:
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return IB_OPCODE_RC_COMPARE_SWAP;
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case IB_WR_ATOMIC_FETCH_AND_ADD:
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return IB_OPCODE_RC_FETCH_ADD;
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case IB_WR_SEND_WITH_INV:
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if (qp->req.opcode == IB_OPCODE_RC_SEND_FIRST ||
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qp->req.opcode == IB_OPCODE_RC_SEND_MIDDLE)
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return fits ? IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE :
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IB_OPCODE_RC_SEND_MIDDLE;
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else
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return fits ? IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE :
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IB_OPCODE_RC_SEND_FIRST;
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case IB_WR_REG_MR:
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case IB_WR_LOCAL_INV:
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return opcode;
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}
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return -EINVAL;
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}
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static int next_opcode_uc(struct rxe_qp *qp, u32 opcode, int fits)
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{
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switch (opcode) {
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case IB_WR_RDMA_WRITE:
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if (qp->req.opcode == IB_OPCODE_UC_RDMA_WRITE_FIRST ||
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qp->req.opcode == IB_OPCODE_UC_RDMA_WRITE_MIDDLE)
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return fits ?
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IB_OPCODE_UC_RDMA_WRITE_LAST :
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IB_OPCODE_UC_RDMA_WRITE_MIDDLE;
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else
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return fits ?
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IB_OPCODE_UC_RDMA_WRITE_ONLY :
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IB_OPCODE_UC_RDMA_WRITE_FIRST;
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case IB_WR_RDMA_WRITE_WITH_IMM:
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if (qp->req.opcode == IB_OPCODE_UC_RDMA_WRITE_FIRST ||
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qp->req.opcode == IB_OPCODE_UC_RDMA_WRITE_MIDDLE)
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return fits ?
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IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE :
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IB_OPCODE_UC_RDMA_WRITE_MIDDLE;
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else
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return fits ?
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IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE :
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IB_OPCODE_UC_RDMA_WRITE_FIRST;
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case IB_WR_SEND:
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if (qp->req.opcode == IB_OPCODE_UC_SEND_FIRST ||
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qp->req.opcode == IB_OPCODE_UC_SEND_MIDDLE)
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return fits ?
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IB_OPCODE_UC_SEND_LAST :
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IB_OPCODE_UC_SEND_MIDDLE;
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else
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return fits ?
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IB_OPCODE_UC_SEND_ONLY :
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IB_OPCODE_UC_SEND_FIRST;
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case IB_WR_SEND_WITH_IMM:
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if (qp->req.opcode == IB_OPCODE_UC_SEND_FIRST ||
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qp->req.opcode == IB_OPCODE_UC_SEND_MIDDLE)
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return fits ?
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IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE :
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IB_OPCODE_UC_SEND_MIDDLE;
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else
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return fits ?
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IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE :
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IB_OPCODE_UC_SEND_FIRST;
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}
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return -EINVAL;
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}
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static int next_opcode(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
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u32 opcode)
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{
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int fits = (wqe->dma.resid <= qp->mtu);
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switch (qp_type(qp)) {
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case IB_QPT_RC:
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return next_opcode_rc(qp, opcode, fits);
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case IB_QPT_UC:
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return next_opcode_uc(qp, opcode, fits);
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case IB_QPT_SMI:
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case IB_QPT_UD:
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case IB_QPT_GSI:
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switch (opcode) {
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case IB_WR_SEND:
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return IB_OPCODE_UD_SEND_ONLY;
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case IB_WR_SEND_WITH_IMM:
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return IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
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}
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break;
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default:
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break;
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}
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return -EINVAL;
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}
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static inline int check_init_depth(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
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{
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int depth;
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if (wqe->has_rd_atomic)
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return 0;
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qp->req.need_rd_atomic = 1;
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depth = atomic_dec_return(&qp->req.rd_atomic);
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if (depth >= 0) {
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qp->req.need_rd_atomic = 0;
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wqe->has_rd_atomic = 1;
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return 0;
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}
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atomic_inc(&qp->req.rd_atomic);
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return -EAGAIN;
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}
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static inline int get_mtu(struct rxe_qp *qp)
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{
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struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
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if ((qp_type(qp) == IB_QPT_RC) || (qp_type(qp) == IB_QPT_UC))
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return qp->mtu;
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return rxe->port.mtu_cap;
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}
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static struct sk_buff *init_req_packet(struct rxe_qp *qp,
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struct rxe_send_wqe *wqe,
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int opcode, int payload,
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struct rxe_pkt_info *pkt)
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{
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struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
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struct rxe_port *port = &rxe->port;
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struct sk_buff *skb;
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struct rxe_send_wr *ibwr = &wqe->wr;
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struct rxe_av *av;
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int pad = (-payload) & 0x3;
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int paylen;
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int solicited;
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u16 pkey;
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u32 qp_num;
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int ack_req;
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/* length from start of bth to end of icrc */
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paylen = rxe_opcode[opcode].length + payload + pad + RXE_ICRC_SIZE;
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/* pkt->hdr, rxe, port_num and mask are initialized in ifc
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* layer
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*/
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pkt->opcode = opcode;
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pkt->qp = qp;
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pkt->psn = qp->req.psn;
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pkt->mask = rxe_opcode[opcode].mask;
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pkt->paylen = paylen;
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pkt->offset = 0;
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pkt->wqe = wqe;
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/* init skb */
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av = rxe_get_av(pkt);
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skb = rxe_init_packet(rxe, av, paylen, pkt);
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if (unlikely(!skb))
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return NULL;
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/* init bth */
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solicited = (ibwr->send_flags & IB_SEND_SOLICITED) &&
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(pkt->mask & RXE_END_MASK) &&
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((pkt->mask & (RXE_SEND_MASK)) ||
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(pkt->mask & (RXE_WRITE_MASK | RXE_IMMDT_MASK)) ==
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(RXE_WRITE_MASK | RXE_IMMDT_MASK));
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pkey = (qp_type(qp) == IB_QPT_GSI) ?
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port->pkey_tbl[ibwr->wr.ud.pkey_index] :
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port->pkey_tbl[qp->attr.pkey_index];
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qp_num = (pkt->mask & RXE_DETH_MASK) ? ibwr->wr.ud.remote_qpn :
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qp->attr.dest_qp_num;
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ack_req = ((pkt->mask & RXE_END_MASK) ||
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(qp->req.noack_pkts++ > RXE_MAX_PKT_PER_ACK));
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if (ack_req)
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qp->req.noack_pkts = 0;
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bth_init(pkt, pkt->opcode, solicited, 0, pad, pkey, qp_num,
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ack_req, pkt->psn);
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/* init optional headers */
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if (pkt->mask & RXE_RETH_MASK) {
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reth_set_rkey(pkt, ibwr->wr.rdma.rkey);
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reth_set_va(pkt, wqe->iova);
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reth_set_len(pkt, wqe->dma.resid);
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}
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if (pkt->mask & RXE_IMMDT_MASK)
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immdt_set_imm(pkt, ibwr->ex.imm_data);
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if (pkt->mask & RXE_IETH_MASK)
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ieth_set_rkey(pkt, ibwr->ex.invalidate_rkey);
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if (pkt->mask & RXE_ATMETH_MASK) {
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atmeth_set_va(pkt, wqe->iova);
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if (opcode == IB_OPCODE_RC_COMPARE_SWAP ||
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opcode == IB_OPCODE_RD_COMPARE_SWAP) {
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atmeth_set_swap_add(pkt, ibwr->wr.atomic.swap);
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atmeth_set_comp(pkt, ibwr->wr.atomic.compare_add);
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} else {
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atmeth_set_swap_add(pkt, ibwr->wr.atomic.compare_add);
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}
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atmeth_set_rkey(pkt, ibwr->wr.atomic.rkey);
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}
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if (pkt->mask & RXE_DETH_MASK) {
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if (qp->ibqp.qp_num == 1)
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deth_set_qkey(pkt, GSI_QKEY);
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else
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deth_set_qkey(pkt, ibwr->wr.ud.remote_qkey);
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deth_set_sqp(pkt, qp->ibqp.qp_num);
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}
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return skb;
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}
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static int fill_packet(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
|
|
struct rxe_pkt_info *pkt, struct sk_buff *skb,
|
|
int paylen)
|
|
{
|
|
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
|
|
u32 crc = 0;
|
|
u32 *p;
|
|
int err;
|
|
|
|
err = rxe_prepare(rxe, pkt, skb, &crc);
|
|
if (err)
|
|
return err;
|
|
|
|
if (pkt->mask & RXE_WRITE_OR_SEND) {
|
|
if (wqe->wr.send_flags & IB_SEND_INLINE) {
|
|
u8 *tmp = &wqe->dma.inline_data[wqe->dma.sge_offset];
|
|
|
|
crc = rxe_crc32(rxe, crc, tmp, paylen);
|
|
memcpy(payload_addr(pkt), tmp, paylen);
|
|
|
|
wqe->dma.resid -= paylen;
|
|
wqe->dma.sge_offset += paylen;
|
|
} else {
|
|
err = copy_data(qp->pd, 0, &wqe->dma,
|
|
payload_addr(pkt), paylen,
|
|
from_mem_obj,
|
|
&crc);
|
|
if (err)
|
|
return err;
|
|
}
|
|
if (bth_pad(pkt)) {
|
|
u8 *pad = payload_addr(pkt) + paylen;
|
|
|
|
memset(pad, 0, bth_pad(pkt));
|
|
crc = rxe_crc32(rxe, crc, pad, bth_pad(pkt));
|
|
}
|
|
}
|
|
p = payload_addr(pkt) + paylen + bth_pad(pkt);
|
|
|
|
*p = ~crc;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void update_wqe_state(struct rxe_qp *qp,
|
|
struct rxe_send_wqe *wqe,
|
|
struct rxe_pkt_info *pkt)
|
|
{
|
|
if (pkt->mask & RXE_END_MASK) {
|
|
if (qp_type(qp) == IB_QPT_RC)
|
|
wqe->state = wqe_state_pending;
|
|
} else {
|
|
wqe->state = wqe_state_processing;
|
|
}
|
|
}
|
|
|
|
static void update_wqe_psn(struct rxe_qp *qp,
|
|
struct rxe_send_wqe *wqe,
|
|
struct rxe_pkt_info *pkt,
|
|
int payload)
|
|
{
|
|
/* number of packets left to send including current one */
|
|
int num_pkt = (wqe->dma.resid + payload + qp->mtu - 1) / qp->mtu;
|
|
|
|
/* handle zero length packet case */
|
|
if (num_pkt == 0)
|
|
num_pkt = 1;
|
|
|
|
if (pkt->mask & RXE_START_MASK) {
|
|
wqe->first_psn = qp->req.psn;
|
|
wqe->last_psn = (qp->req.psn + num_pkt - 1) & BTH_PSN_MASK;
|
|
}
|
|
|
|
if (pkt->mask & RXE_READ_MASK)
|
|
qp->req.psn = (wqe->first_psn + num_pkt) & BTH_PSN_MASK;
|
|
else
|
|
qp->req.psn = (qp->req.psn + 1) & BTH_PSN_MASK;
|
|
}
|
|
|
|
static void save_state(struct rxe_send_wqe *wqe,
|
|
struct rxe_qp *qp,
|
|
struct rxe_send_wqe *rollback_wqe,
|
|
u32 *rollback_psn)
|
|
{
|
|
rollback_wqe->state = wqe->state;
|
|
rollback_wqe->first_psn = wqe->first_psn;
|
|
rollback_wqe->last_psn = wqe->last_psn;
|
|
*rollback_psn = qp->req.psn;
|
|
}
|
|
|
|
static void rollback_state(struct rxe_send_wqe *wqe,
|
|
struct rxe_qp *qp,
|
|
struct rxe_send_wqe *rollback_wqe,
|
|
u32 rollback_psn)
|
|
{
|
|
wqe->state = rollback_wqe->state;
|
|
wqe->first_psn = rollback_wqe->first_psn;
|
|
wqe->last_psn = rollback_wqe->last_psn;
|
|
qp->req.psn = rollback_psn;
|
|
}
|
|
|
|
static void update_state(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
|
|
struct rxe_pkt_info *pkt, int payload)
|
|
{
|
|
qp->req.opcode = pkt->opcode;
|
|
|
|
if (pkt->mask & RXE_END_MASK)
|
|
qp->req.wqe_index = next_index(qp->sq.queue, qp->req.wqe_index);
|
|
|
|
qp->need_req_skb = 0;
|
|
|
|
if (qp->qp_timeout_jiffies && !timer_pending(&qp->retrans_timer))
|
|
mod_timer(&qp->retrans_timer,
|
|
jiffies + qp->qp_timeout_jiffies);
|
|
}
|
|
|
|
int rxe_requester(void *arg)
|
|
{
|
|
struct rxe_qp *qp = (struct rxe_qp *)arg;
|
|
struct rxe_pkt_info pkt;
|
|
struct sk_buff *skb;
|
|
struct rxe_send_wqe *wqe;
|
|
enum rxe_hdr_mask mask;
|
|
int payload;
|
|
int mtu;
|
|
int opcode;
|
|
int ret;
|
|
struct rxe_send_wqe rollback_wqe;
|
|
u32 rollback_psn;
|
|
|
|
rxe_add_ref(qp);
|
|
|
|
next_wqe:
|
|
if (unlikely(!qp->valid || qp->req.state == QP_STATE_ERROR))
|
|
goto exit;
|
|
|
|
if (unlikely(qp->req.state == QP_STATE_RESET)) {
|
|
qp->req.wqe_index = consumer_index(qp->sq.queue);
|
|
qp->req.opcode = -1;
|
|
qp->req.need_rd_atomic = 0;
|
|
qp->req.wait_psn = 0;
|
|
qp->req.need_retry = 0;
|
|
goto exit;
|
|
}
|
|
|
|
if (unlikely(qp->req.need_retry)) {
|
|
req_retry(qp);
|
|
qp->req.need_retry = 0;
|
|
}
|
|
|
|
wqe = req_next_wqe(qp);
|
|
if (unlikely(!wqe))
|
|
goto exit;
|
|
|
|
if (wqe->mask & WR_REG_MASK) {
|
|
if (wqe->wr.opcode == IB_WR_LOCAL_INV) {
|
|
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
|
|
struct rxe_mem *rmr;
|
|
|
|
rmr = rxe_pool_get_index(&rxe->mr_pool,
|
|
wqe->wr.ex.invalidate_rkey >> 8);
|
|
if (!rmr) {
|
|
pr_err("No mr for key %#x\n",
|
|
wqe->wr.ex.invalidate_rkey);
|
|
wqe->state = wqe_state_error;
|
|
wqe->status = IB_WC_MW_BIND_ERR;
|
|
goto exit;
|
|
}
|
|
rmr->state = RXE_MEM_STATE_FREE;
|
|
rxe_drop_ref(rmr);
|
|
wqe->state = wqe_state_done;
|
|
wqe->status = IB_WC_SUCCESS;
|
|
} else if (wqe->wr.opcode == IB_WR_REG_MR) {
|
|
struct rxe_mem *rmr = to_rmr(wqe->wr.wr.reg.mr);
|
|
|
|
rmr->state = RXE_MEM_STATE_VALID;
|
|
rmr->access = wqe->wr.wr.reg.access;
|
|
rmr->lkey = wqe->wr.wr.reg.key;
|
|
rmr->rkey = wqe->wr.wr.reg.key;
|
|
rmr->iova = wqe->wr.wr.reg.mr->iova;
|
|
wqe->state = wqe_state_done;
|
|
wqe->status = IB_WC_SUCCESS;
|
|
} else {
|
|
goto exit;
|
|
}
|
|
if ((wqe->wr.send_flags & IB_SEND_SIGNALED) ||
|
|
qp->sq_sig_type == IB_SIGNAL_ALL_WR)
|
|
rxe_run_task(&qp->comp.task, 1);
|
|
qp->req.wqe_index = next_index(qp->sq.queue,
|
|
qp->req.wqe_index);
|
|
goto next_wqe;
|
|
}
|
|
|
|
if (unlikely(qp_type(qp) == IB_QPT_RC &&
|
|
psn_compare(qp->req.psn, (qp->comp.psn +
|
|
RXE_MAX_UNACKED_PSNS)) > 0)) {
|
|
qp->req.wait_psn = 1;
|
|
goto exit;
|
|
}
|
|
|
|
/* Limit the number of inflight SKBs per QP */
|
|
if (unlikely(atomic_read(&qp->skb_out) >
|
|
RXE_INFLIGHT_SKBS_PER_QP_HIGH)) {
|
|
qp->need_req_skb = 1;
|
|
goto exit;
|
|
}
|
|
|
|
opcode = next_opcode(qp, wqe, wqe->wr.opcode);
|
|
if (unlikely(opcode < 0)) {
|
|
wqe->status = IB_WC_LOC_QP_OP_ERR;
|
|
goto exit;
|
|
}
|
|
|
|
mask = rxe_opcode[opcode].mask;
|
|
if (unlikely(mask & RXE_READ_OR_ATOMIC)) {
|
|
if (check_init_depth(qp, wqe))
|
|
goto exit;
|
|
}
|
|
|
|
mtu = get_mtu(qp);
|
|
payload = (mask & RXE_WRITE_OR_SEND) ? wqe->dma.resid : 0;
|
|
if (payload > mtu) {
|
|
if (qp_type(qp) == IB_QPT_UD) {
|
|
/* C10-93.1.1: If the total sum of all the buffer lengths specified for a
|
|
* UD message exceeds the MTU of the port as returned by QueryHCA, the CI
|
|
* shall not emit any packets for this message. Further, the CI shall not
|
|
* generate an error due to this condition.
|
|
*/
|
|
|
|
/* fake a successful UD send */
|
|
wqe->first_psn = qp->req.psn;
|
|
wqe->last_psn = qp->req.psn;
|
|
qp->req.psn = (qp->req.psn + 1) & BTH_PSN_MASK;
|
|
qp->req.opcode = IB_OPCODE_UD_SEND_ONLY;
|
|
qp->req.wqe_index = next_index(qp->sq.queue,
|
|
qp->req.wqe_index);
|
|
wqe->state = wqe_state_done;
|
|
wqe->status = IB_WC_SUCCESS;
|
|
__rxe_do_task(&qp->comp.task);
|
|
rxe_drop_ref(qp);
|
|
return 0;
|
|
}
|
|
payload = mtu;
|
|
}
|
|
|
|
skb = init_req_packet(qp, wqe, opcode, payload, &pkt);
|
|
if (unlikely(!skb)) {
|
|
pr_err("qp#%d Failed allocating skb\n", qp_num(qp));
|
|
goto err;
|
|
}
|
|
|
|
if (fill_packet(qp, wqe, &pkt, skb, payload)) {
|
|
pr_debug("qp#%d Error during fill packet\n", qp_num(qp));
|
|
kfree_skb(skb);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* To prevent a race on wqe access between requester and completer,
|
|
* wqe members state and psn need to be set before calling
|
|
* rxe_xmit_packet().
|
|
* Otherwise, completer might initiate an unjustified retry flow.
|
|
*/
|
|
save_state(wqe, qp, &rollback_wqe, &rollback_psn);
|
|
update_wqe_state(qp, wqe, &pkt);
|
|
update_wqe_psn(qp, wqe, &pkt, payload);
|
|
ret = rxe_xmit_packet(to_rdev(qp->ibqp.device), qp, &pkt, skb);
|
|
if (ret) {
|
|
qp->need_req_skb = 1;
|
|
|
|
rollback_state(wqe, qp, &rollback_wqe, rollback_psn);
|
|
|
|
if (ret == -EAGAIN) {
|
|
rxe_run_task(&qp->req.task, 1);
|
|
goto exit;
|
|
}
|
|
|
|
goto err;
|
|
}
|
|
|
|
update_state(qp, wqe, &pkt, payload);
|
|
|
|
goto next_wqe;
|
|
|
|
err:
|
|
wqe->status = IB_WC_LOC_PROT_ERR;
|
|
wqe->state = wqe_state_error;
|
|
__rxe_do_task(&qp->comp.task);
|
|
|
|
exit:
|
|
rxe_drop_ref(qp);
|
|
return -EAGAIN;
|
|
}
|