diff options
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_rc.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_rc.c | 38 |
1 files changed, 33 insertions, 5 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_rc.c b/drivers/infiniband/hw/ipath/ipath_rc.c index 014d811d222..9e7123987ae 100644 --- a/drivers/infiniband/hw/ipath/ipath_rc.c +++ b/drivers/infiniband/hw/ipath/ipath_rc.c @@ -125,8 +125,10 @@ static int ipath_make_rc_ack(struct ipath_qp *qp, if (len > pmtu) { len = pmtu; qp->s_ack_state = OP(RDMA_READ_RESPONSE_FIRST); - } else + } else { qp->s_ack_state = OP(RDMA_READ_RESPONSE_ONLY); + e->sent = 1; + } ohdr->u.aeth = ipath_compute_aeth(qp); hwords++; qp->s_ack_rdma_psn = e->psn; @@ -143,6 +145,7 @@ static int ipath_make_rc_ack(struct ipath_qp *qp, cpu_to_be32(e->atomic_data); hwords += sizeof(ohdr->u.at) / sizeof(u32); bth2 = e->psn; + e->sent = 1; } bth0 = qp->s_ack_state << 24; break; @@ -158,6 +161,7 @@ static int ipath_make_rc_ack(struct ipath_qp *qp, ohdr->u.aeth = ipath_compute_aeth(qp); hwords++; qp->s_ack_state = OP(RDMA_READ_RESPONSE_LAST); + qp->s_ack_queue[qp->s_tail_ack_queue].sent = 1; } bth0 = qp->s_ack_state << 24; bth2 = qp->s_ack_rdma_psn++ & IPATH_PSN_MASK; @@ -1479,6 +1483,22 @@ static void ipath_rc_error(struct ipath_qp *qp, enum ib_wc_status err) spin_unlock_irqrestore(&qp->s_lock, flags); } +static inline void ipath_update_ack_queue(struct ipath_qp *qp, unsigned n) +{ + unsigned long flags; + unsigned next; + + next = n + 1; + if (next > IPATH_MAX_RDMA_ATOMIC) + next = 0; + spin_lock_irqsave(&qp->s_lock, flags); + if (n == qp->s_tail_ack_queue) { + qp->s_tail_ack_queue = next; + qp->s_ack_state = OP(ACKNOWLEDGE); + } + spin_unlock_irqrestore(&qp->s_lock, flags); +} + /** * ipath_rc_rcv - process an incoming RC packet * @dev: the device this packet came in on @@ -1741,8 +1761,11 @@ void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, next = qp->r_head_ack_queue + 1; if (next > IPATH_MAX_RDMA_ATOMIC) next = 0; - if (unlikely(next == qp->s_tail_ack_queue)) - goto nack_inv; + if (unlikely(next == qp->s_tail_ack_queue)) { + if (!qp->s_ack_queue[next].sent) + goto nack_inv; + ipath_update_ack_queue(qp, next); + } e = &qp->s_ack_queue[qp->r_head_ack_queue]; /* RETH comes after BTH */ if (!header_in_data) @@ -1777,6 +1800,7 @@ void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, e->rdma_sge.sge.sge_length = 0; } e->opcode = opcode; + e->sent = 0; e->psn = psn; /* * We need to increment the MSN here instead of when we @@ -1812,8 +1836,11 @@ void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, next = qp->r_head_ack_queue + 1; if (next > IPATH_MAX_RDMA_ATOMIC) next = 0; - if (unlikely(next == qp->s_tail_ack_queue)) - goto nack_inv; + if (unlikely(next == qp->s_tail_ack_queue)) { + if (!qp->s_ack_queue[next].sent) + goto nack_inv; + ipath_update_ack_queue(qp, next); + } if (!header_in_data) ateth = &ohdr->u.atomic_eth; else @@ -1838,6 +1865,7 @@ void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, be64_to_cpu(ateth->compare_data), sdata); e->opcode = opcode; + e->sent = 0; e->psn = psn & IPATH_PSN_MASK; qp->r_msn++; qp->r_psn++; |