[PATCH] IB/mthca: Add SRQ implementation

[safe/jmp/linux-2.6] / drivers / infiniband / hw / mthca / mthca_qp.c

diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index ebb8f4a..7607b98 100644 (file)
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -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