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authorOr Gerlitz <ogerlitz@voltaire.com>2006-06-17 20:37:37 -0700
committerRoland Dreier <rolandd@cisco.com>2006-06-17 20:37:37 -0700
commitd4cb0784fd1ea99ef3d20526811bd5608146fe60 (patch)
tree214f2e6923c9a04c27b09d790968736cc90c0cdd /drivers
parent6eddb5cb906ac5c9a17a1b76464eadacd88b6c92 (diff)
IB/mthca: Fill in max_map_per_fmr device attribute
Report the true max_map_per_fmr value from mthca_query_device(), taking into account the change in FMR remapping introduced by the Sinai performance optimization. Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/hw/mthca/mthca_provider.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index a2eae8a3016..8f89ba7c914 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -115,6 +115,16 @@ static int mthca_query_device(struct ib_device *ibdev,
props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
props->max_mcast_grp;
+ /*
+ * If Sinai memory key optimization is being used, then only
+ * the 8-bit key portion will change. For other HCAs, the
+ * unused index bits will also be used for FMR remapping.
+ */
+ if (mdev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
+ props->max_map_per_fmr = 255;
+ else
+ props->max_map_per_fmr =
+ (1 << (32 - long_log2(mdev->limits.num_mpts))) - 1;
err = 0;
out: