svn commit: r289596 - head/sys/dev/ntb/ntb_hw

[Conrad E. Meyer]

Author: cem
Date: Mon Oct 19 17:41:22 2015
New Revision: 289596
URL: https://svnweb.freebsd.org/changeset/base/289596

Log:
  NTB: Add ntb_mw_clear_trans() missed in r289546
  
  It is just a trivial wrapper around ntb_mw_set_trans().
  
  Authored by:	Allen Hubbe
  Obtained from:	Linux (Dual BSD/GPL driver)
  Sponsored by:	EMC / Isilon Storage Division

Modified:
  head/sys/dev/ntb/ntb_hw/ntb_hw.c

Modified: head/sys/dev/ntb/ntb_hw/ntb_hw.c
==============================================================================
--- head/sys/dev/ntb/ntb_hw/ntb_hw.c	Mon Oct 19 17:31:51 2015	(r289595)
+++ head/sys/dev/ntb/ntb_hw/ntb_hw.c	Mon Oct 19 17:41:22 2015	(r289596)
@@ -2117,6 +2117,23 @@ ntb_mw_set_trans(struct ntb_softc *ntb, 
 	return (0);
 }
 
+/*
+ * ntb_mw_clear_trans() - clear the translation of a memory window
+ * @ntb:	NTB device context
+ * @idx:	Memory window number
+ *
+ * Clear the translation of a memory window.  The peer may no longer access
+ * local memory through the window.
+ *
+ * Return: Zero on success, otherwise an error number.
+ */
+int
+ntb_mw_clear_trans(struct ntb_softc *ntb, unsigned mw_idx)
+{
+
+	return (ntb_mw_set_trans(ntb, mw_idx, 0, 0));
+}
+
 /**
  * ntb_peer_db_set() - Set the doorbell on the secondary/external side
  * @ntb: pointer to ntb_softc instance