From: sleybo <sleybo@ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86>
Date: Wed, 13 Dec 2006 07:50:04 +0000 (+0000)
Subject: [MTHCA] return a real max_map_per_fmr
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=a0513956ba6af07ae642ff85953ea919266573d4;p=~shefty%2Frdma-win.git

[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 81f811e7..6618cec5 100644
--- 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);