diff options
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_rc.c | 57 |
1 files changed, 38 insertions, 19 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_rc.c b/drivers/infiniband/hw/ipath/ipath_rc.c index 9ba80d107dc..014d811d222 100644 --- a/drivers/infiniband/hw/ipath/ipath_rc.c +++ b/drivers/infiniband/hw/ipath/ipath_rc.c @@ -806,13 +806,15 @@ static inline void update_last_psn(struct ipath_qp *qp, u32 psn) * Called at interrupt level with the QP s_lock held and interrupts disabled. * Returns 1 if OK, 0 if current operation should be aborted (NAK). */ -static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode) +static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode, + u64 val) { struct ipath_ibdev *dev = to_idev(qp->ibqp.device); struct ib_wc wc; struct ipath_swqe *wqe; int ret = 0; u32 ack_psn; + int diff; /* * Remove the QP from the timeout queue (or RNR timeout queue). @@ -840,7 +842,19 @@ static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode) * The MSN might be for a later WQE than the PSN indicates so * only complete WQEs that the PSN finishes. */ - while (ipath_cmp24(ack_psn, wqe->lpsn) >= 0) { + while ((diff = ipath_cmp24(ack_psn, wqe->lpsn)) >= 0) { + /* + * RDMA_READ_RESPONSE_ONLY is a special case since + * we want to generate completion events for everything + * before the RDMA read, copy the data, then generate + * the completion for the read. + */ + if (wqe->wr.opcode == IB_WR_RDMA_READ && + opcode == OP(RDMA_READ_RESPONSE_ONLY) && + diff == 0) { + ret = 1; + goto bail; + } /* * If this request is a RDMA read or atomic, and the ACK is * for a later operation, this ACK NAKs the RDMA read or @@ -851,12 +865,10 @@ static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode) * is sent but before the response is received. */ if ((wqe->wr.opcode == IB_WR_RDMA_READ && - (opcode != OP(RDMA_READ_RESPONSE_LAST) || - ipath_cmp24(ack_psn, wqe->lpsn) != 0)) || + (opcode != OP(RDMA_READ_RESPONSE_LAST) || diff != 0)) || ((wqe->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP || wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD) && - (opcode != OP(ATOMIC_ACKNOWLEDGE) || - ipath_cmp24(wqe->psn, psn) != 0))) { + (opcode != OP(ATOMIC_ACKNOWLEDGE) || diff != 0))) { /* * The last valid PSN seen is the previous * request's. @@ -870,6 +882,9 @@ static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode) */ goto bail; } + if (wqe->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP || + wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD) + *(u64 *) wqe->sg_list[0].vaddr = val; if (qp->s_num_rd_atomic && (wqe->wr.opcode == IB_WR_RDMA_READ || wqe->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP || @@ -1079,6 +1094,7 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev, int diff; u32 pad; u32 aeth; + u64 val; spin_lock_irqsave(&qp->s_lock, flags); @@ -1118,8 +1134,6 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev, data += sizeof(__be32); } if (opcode == OP(ATOMIC_ACKNOWLEDGE)) { - u64 val; - if (!header_in_data) { __be32 *p = ohdr->u.at.atomic_ack_eth; @@ -1127,12 +1141,13 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev, be32_to_cpu(p[1]); } else val = be64_to_cpu(((__be64 *) data)[0]); - *(u64 *) wqe->sg_list[0].vaddr = val; - } - if (!do_rc_ack(qp, aeth, psn, opcode) || + } else + val = 0; + if (!do_rc_ack(qp, aeth, psn, opcode, val) || opcode != OP(RDMA_READ_RESPONSE_FIRST)) goto ack_done; hdrsize += 4; + wqe = get_swqe_ptr(qp, qp->s_last); if (unlikely(wqe->wr.opcode != IB_WR_RDMA_READ)) goto ack_op_err; /* @@ -1176,13 +1191,12 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev, goto bail; case OP(RDMA_READ_RESPONSE_ONLY): - if (unlikely(ipath_cmp24(psn, qp->s_last_psn + 1))) { - dev->n_rdma_seq++; - ipath_restart_rc(qp, qp->s_last_psn + 1, &wc); + if (!header_in_data) + aeth = be32_to_cpu(ohdr->u.aeth); + else + aeth = be32_to_cpu(((__be32 *) data)[0]); + if (!do_rc_ack(qp, aeth, psn, opcode, 0)) goto ack_done; - } - if (unlikely(wqe->wr.opcode != IB_WR_RDMA_READ)) - goto ack_op_err; /* Get the number of bytes the message was padded by. */ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; /* @@ -1197,6 +1211,7 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev, * have to be careful to copy the data to the right * location. */ + wqe = get_swqe_ptr(qp, qp->s_last); qp->s_rdma_read_len = restart_sge(&qp->s_rdma_read_sge, wqe, psn, pmtu); goto read_last; @@ -1230,7 +1245,8 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev, data += sizeof(__be32); } ipath_copy_sge(&qp->s_rdma_read_sge, data, tlen); - (void) do_rc_ack(qp, aeth, psn, OP(RDMA_READ_RESPONSE_LAST)); + (void) do_rc_ack(qp, aeth, psn, + OP(RDMA_READ_RESPONSE_LAST), 0); goto ack_done; } @@ -1344,8 +1360,11 @@ static inline int ipath_rc_rcv_error(struct ipath_ibdev *dev, e = NULL; break; } - if (ipath_cmp24(psn, e->psn) >= 0) + if (ipath_cmp24(psn, e->psn) >= 0) { + if (prev == qp->s_tail_ack_queue) + old_req = 0; break; + } } switch (opcode) { case OP(RDMA_READ_REQUEST): { |