[PATCH] IB uverbs: add mthca user PD support

Add support for userspace protection domains (PDs) to mthca.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 15 insertions, 9 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_pd.c b/drivers/infiniband/hw/mthca/mthca_pd.c
index ea66847e4ea3..c2c899844e98 100644
--- a/drivers/infiniband/hw/mthca/mthca_pd.c
+++ b/drivers/infiniband/hw/mthca/mthca_pd.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Cisco Systems.  All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU
@@ -37,23 +38,27 @@
 
 #include "mthca_dev.h"
 
-int mthca_pd_alloc(struct mthca_dev *dev, struct mthca_pd *pd)
+int mthca_pd_alloc(struct mthca_dev *dev, int privileged, struct mthca_pd *pd)
 {
-        int err;
+        int err = 0;
 
         might_sleep();
 
+        pd->privileged = privileged;
+
         atomic_set(&pd->sqp_count, 0);
         pd->pd_num = mthca_alloc(&dev->pd_table.alloc);
         if (pd->pd_num == -1)
                 return -ENOMEM;
 
-        err = mthca_mr_alloc_notrans(dev, pd->pd_num,
-                                     MTHCA_MPT_FLAG_LOCAL_READ |
-                                     MTHCA_MPT_FLAG_LOCAL_WRITE,
-                                     &pd->ntmr);
-        if (err)
-                mthca_free(&dev->pd_table.alloc, pd->pd_num);
+        if (privileged) {
+                err = mthca_mr_alloc_notrans(dev, pd->pd_num,
+                                             MTHCA_MPT_FLAG_LOCAL_READ |
+                                             MTHCA_MPT_FLAG_LOCAL_WRITE,
+                                             &pd->ntmr);
+                if (err)
+                        mthca_free(&dev->pd_table.alloc, pd->pd_num);
+        }
 
         return err;
 }
@@ -61,7 +66,8 @@ int mthca_pd_alloc(struct mthca_dev *dev, struct mthca_pd *pd)
 void mthca_pd_free(struct mthca_dev *dev, struct mthca_pd *pd)
 {
         might_sleep();
-        mthca_free_mr(dev, &pd->ntmr);
+        if (pd->privileged)
+                mthca_free_mr(dev, &pd->ntmr);
         mthca_free(&dev->pd_table.alloc, pd->pd_num);
 }