[IB] mthca: Better limit checking and reporting

Check the sizes of CQs, QPs and SRQs when creating objects, and fail
instead of creating too-big queues.  Also return real limits instead
of just plausible-sounding values from mthca_query_device().

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_main.c b/drivers/infiniband/hw/mthca/mthca_main.c
index 576e7fcd053c..7c35abec81ea 100644
--- a/drivers/infiniband/hw/mthca/mthca_main.c
+++ b/drivers/infiniband/hw/mthca/mthca_main.c
@@ -162,9 +162,18 @@ static int __devinit mthca_dev_lim(struct mthca_dev *mdev, struct mthca_dev_lim
         mdev->limits.pkey_table_len     = dev_lim->max_pkeys;
         mdev->limits.local_ca_ack_delay = dev_lim->local_ca_ack_delay;
         mdev->limits.max_sg             = dev_lim->max_sg;
+        mdev->limits.max_wqes           = dev_lim->max_qp_sz;
+        mdev->limits.max_qp_init_rdma   = dev_lim->max_requester_per_qp;
         mdev->limits.reserved_qps       = dev_lim->reserved_qps;
+        mdev->limits.max_srq_wqes       = dev_lim->max_srq_sz;
         mdev->limits.reserved_srqs      = dev_lim->reserved_srqs;
         mdev->limits.reserved_eecs      = dev_lim->reserved_eecs;
+        /*
+         * Subtract 1 from the limit because we need to allocate a
+         * spare CQE so the HCA HW can tell the difference between an
+         * empty CQ and a full CQ.
+         */
+        mdev->limits.max_cqes           = dev_lim->max_cq_sz - 1;
         mdev->limits.reserved_cqs       = dev_lim->reserved_cqs;
         mdev->limits.reserved_eqs       = dev_lim->reserved_eqs;
         mdev->limits.reserved_mtts      = dev_lim->reserved_mtts;