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[PATCH] IB/mthca: Add SRQ implementation

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Add mthca support for shared receive queues (SRQs),
including userspace SRQs.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier
2005-08-19 10:59:31 -07:00
committed by Roland Dreier
parent d20a401928
commit ec34a922d2
13 changed files with 857 additions and 25 deletions
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33
drivers/infiniband/hw/mthca/mthca_qp.c
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@@ -612,10 +612,13 @@ int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
qp_context->mtu_msgmax = (attr->path_mtu << 5) | 31;
if (mthca_is_memfree(dev)) {
qp_context->rq_size_stride =
((ffs(qp->rq.max) - 1) << 3) | (qp->rq.wqe_shift - 4);
qp_context->sq_size_stride =
((ffs(qp->sq.max) - 1) << 3) | (qp->sq.wqe_shift - 4);
if (qp->rq.max)
qp_context->rq_size_stride = long_log2(qp->rq.max) << 3;
qp_context->rq_size_stride |= qp->rq.wqe_shift - 4;
if (qp->sq.max)
qp_context->sq_size_stride = long_log2(qp->sq.max) << 3;
qp_context->sq_size_stride |= qp->sq.wqe_shift - 4;
}
/* leave arbel_sched_queue as 0 */
@@ -784,6 +787,9 @@ int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RSC);
if (ibqp->srq)
qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RIC);
if (attr_mask & IB_QP_MIN_RNR_TIMER) {
qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_TIMEOUT);
@@ -806,6 +812,10 @@ int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_Q_KEY);
}
if (ibqp->srq)
qp_context->srqn = cpu_to_be32(1 << 24 |
to_msrq(ibqp->srq)->srqn);
err = mthca_MODIFY_QP(dev, state_table[cur_state][new_state].trans,
qp->qpn, 0, mailbox, 0, &status);
if (status) {
@@ -1260,9 +1270,11 @@ void mthca_free_qp(struct mthca_dev *dev,
* unref the mem-free tables and free the QPN in our table.
*/
if (!qp->ibqp.uobject) {
mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq)->cqn, qp->qpn);
mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq)->cqn, qp->qpn,
qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
if (qp->ibqp.send_cq != qp->ibqp.recv_cq)
mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq)->cqn, qp->qpn);
mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq)->cqn, qp->qpn,
qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
mthca_free_memfree(dev, qp);
mthca_free_wqe_buf(dev, qp);
@@ -2008,6 +2020,15 @@ int mthca_free_err_wqe(struct mthca_dev *dev, struct mthca_qp *qp, int is_send,
{
struct mthca_next_seg *next;
/*
* For SRQs, all WQEs generate a CQE, so we're always at the
* end of the doorbell chain.
*/
if (qp->ibqp.srq) {
*new_wqe = 0;
return 0;
}
if (is_send)
next = get_send_wqe(qp, index);
else