[PATCH] IB/mthca: fix posting of first work request
Fix posting first WQE for mem-free HCAs: we need to link to previous WQE even in that case. While we're at it, simplify code for Tavor-mode HCAs. We don't really need the conditional test there either; we can similarly always link to the previous WQE. Based on Michael S. Tsirkin's analogous fix for userspace libmthca. Signed-off-by: Roland Dreier <rolandd@cisco.com>
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@ -227,7 +227,6 @@ static void mthca_wq_init(struct mthca_wq *wq)
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wq->last_comp = wq->max - 1;
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wq->head = 0;
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wq->tail = 0;
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wq->last = NULL;
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}
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void mthca_qp_event(struct mthca_dev *dev, u32 qpn,
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@ -1103,6 +1102,9 @@ static int mthca_alloc_qp_common(struct mthca_dev *dev,
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}
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}
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qp->sq.last = get_send_wqe(qp, qp->sq.max - 1);
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qp->rq.last = get_recv_wqe(qp, qp->rq.max - 1);
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return 0;
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}
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@ -1583,15 +1585,13 @@ int mthca_tavor_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
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goto out;
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}
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if (prev_wqe) {
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((struct mthca_next_seg *) prev_wqe)->nda_op =
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cpu_to_be32(((ind << qp->sq.wqe_shift) +
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qp->send_wqe_offset) |
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mthca_opcode[wr->opcode]);
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wmb();
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((struct mthca_next_seg *) prev_wqe)->ee_nds =
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cpu_to_be32((size0 ? 0 : MTHCA_NEXT_DBD) | size);
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}
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((struct mthca_next_seg *) prev_wqe)->nda_op =
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cpu_to_be32(((ind << qp->sq.wqe_shift) +
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qp->send_wqe_offset) |
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mthca_opcode[wr->opcode]);
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wmb();
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((struct mthca_next_seg *) prev_wqe)->ee_nds =
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cpu_to_be32((size0 ? 0 : MTHCA_NEXT_DBD) | size);
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if (!size0) {
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size0 = size;
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@ -1688,13 +1688,11 @@ int mthca_tavor_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
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qp->wrid[ind] = wr->wr_id;
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if (likely(prev_wqe)) {
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((struct mthca_next_seg *) prev_wqe)->nda_op =
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cpu_to_be32((ind << qp->rq.wqe_shift) | 1);
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wmb();
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((struct mthca_next_seg *) prev_wqe)->ee_nds =
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cpu_to_be32(MTHCA_NEXT_DBD | size);
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}
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((struct mthca_next_seg *) prev_wqe)->nda_op =
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cpu_to_be32((ind << qp->rq.wqe_shift) | 1);
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wmb();
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((struct mthca_next_seg *) prev_wqe)->ee_nds =
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cpu_to_be32(MTHCA_NEXT_DBD | size);
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if (!size0)
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size0 = size;
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@ -1905,15 +1903,13 @@ int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
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goto out;
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}
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if (likely(prev_wqe)) {
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((struct mthca_next_seg *) prev_wqe)->nda_op =
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cpu_to_be32(((ind << qp->sq.wqe_shift) +
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qp->send_wqe_offset) |
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mthca_opcode[wr->opcode]);
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wmb();
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((struct mthca_next_seg *) prev_wqe)->ee_nds =
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cpu_to_be32(MTHCA_NEXT_DBD | size);
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}
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((struct mthca_next_seg *) prev_wqe)->nda_op =
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cpu_to_be32(((ind << qp->sq.wqe_shift) +
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qp->send_wqe_offset) |
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mthca_opcode[wr->opcode]);
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wmb();
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((struct mthca_next_seg *) prev_wqe)->ee_nds =
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cpu_to_be32(MTHCA_NEXT_DBD | size);
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if (!size0) {
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size0 = size;
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@ -189,7 +189,6 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
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srq->max = attr->max_wr;
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srq->max_gs = attr->max_sge;
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srq->last = NULL;
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srq->counter = 0;
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if (mthca_is_memfree(dev))
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@ -264,6 +263,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
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srq->first_free = 0;
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srq->last_free = srq->max - 1;
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srq->last = get_wqe(srq, srq->max - 1);
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return 0;
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@ -446,13 +446,11 @@ int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
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((struct mthca_data_seg *) wqe)->addr = 0;
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}
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if (likely(prev_wqe)) {
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((struct mthca_next_seg *) prev_wqe)->nda_op =
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cpu_to_be32((ind << srq->wqe_shift) | 1);
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wmb();
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((struct mthca_next_seg *) prev_wqe)->ee_nds =
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cpu_to_be32(MTHCA_NEXT_DBD);
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}
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((struct mthca_next_seg *) prev_wqe)->nda_op =
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cpu_to_be32((ind << srq->wqe_shift) | 1);
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wmb();
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((struct mthca_next_seg *) prev_wqe)->ee_nds =
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cpu_to_be32(MTHCA_NEXT_DBD);
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srq->wrid[ind] = wr->wr_id;
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srq->first_free = next_ind;
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