[MTHCA] return a real max_map_per_fmr

git-svn-id: svn://openib.tc.cornell.edu/gen1@557 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86

diff --git a/trunk/hw/mthca/kernel/mthca_provider.c b/trunk/hw/mthca/kernel/mthca_provider.c
index 81f811e7b7cd4215e2fb30aec1fe6a82acc53bc5..6618cec560d7613108c43ba22299294e6a5b36fc 100644 (file)
--- a/trunk/hw/mthca/kernel/mthca_provider.c
+++ b/trunk/hw/mthca/kernel/mthca_provider.c
@@ -128,6 +128,17 @@ int mthca_query_device(struct ib_device *ibdev,
        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:
        kfree(in_mad);