svn commit: r306387 - in head/sys/dev/hyperv: include vmbus

[Sepherosa Ziehau]

Author: sephe
Date: Wed Sep 28 04:08:20 2016
New Revision: 306387
URL: https://svnweb.freebsd.org/changeset/base/306387

Log:
  hyperv/vmbus: Add functions to test RX/TX bufring emptiness
  
  MFC after:	1 week
  Sponsored by:	Microsoft
  Differential Revision:	https://reviews.freebsd.org/D8044

Modified:
  head/sys/dev/hyperv/include/vmbus.h
  head/sys/dev/hyperv/vmbus/vmbus_brvar.h
  head/sys/dev/hyperv/vmbus/vmbus_chan.c

Modified: head/sys/dev/hyperv/include/vmbus.h
==============================================================================
--- head/sys/dev/hyperv/include/vmbus.h	Wed Sep 28 04:02:17 2016	(r306386)
+++ head/sys/dev/hyperv/include/vmbus.h	Wed Sep 28 04:08:20 2016	(r306387)
@@ -173,5 +173,7 @@ const struct hyperv_guid *
 		vmbus_chan_guid_inst(const struct vmbus_channel *chan);
 int		vmbus_chan_prplist_nelem(int br_size, int prpcnt_max,
 		    int dlen_max);
+bool		vmbus_chan_rx_empty(const struct vmbus_channel *chan);
+bool		vmbus_chan_tx_empty(const struct vmbus_channel *chan);
 
 #endif	/* !_VMBUS_H_ */

Modified: head/sys/dev/hyperv/vmbus/vmbus_brvar.h
==============================================================================
--- head/sys/dev/hyperv/vmbus/vmbus_brvar.h	Wed Sep 28 04:02:17 2016	(r306386)
+++ head/sys/dev/hyperv/vmbus/vmbus_brvar.h	Wed Sep 28 04:08:20 2016	(r306387)
@@ -83,6 +83,20 @@ vmbus_txbr_maxpktsz(const struct vmbus_t
 	return (tbr->txbr_dsize - sizeof(uint64_t) - 1);
 }
 
+static __inline bool
+vmbus_txbr_empty(const struct vmbus_txbr *tbr)
+{
+
+	return (tbr->txbr_windex == tbr->txbr_rindex ? true : false);
+}
+
+static __inline bool
+vmbus_rxbr_empty(const struct vmbus_rxbr *rbr)
+{
+
+	return (rbr->rxbr_windex == rbr->rxbr_rindex ? true : false);
+}
+
 static __inline int
 vmbus_br_nelem(int br_size, int elem_size)
 {

Modified: head/sys/dev/hyperv/vmbus/vmbus_chan.c
==============================================================================
--- head/sys/dev/hyperv/vmbus/vmbus_chan.c	Wed Sep 28 04:02:17 2016	(r306386)
+++ head/sys/dev/hyperv/vmbus/vmbus_chan.c	Wed Sep 28 04:08:20 2016	(r306387)
@@ -1692,3 +1692,17 @@ vmbus_chan_prplist_nelem(int br_size, in
 
 	return (vmbus_br_nelem(br_size, elem_size));
 }
+
+bool
+vmbus_chan_tx_empty(const struct vmbus_channel *chan)
+{
+
+	return (vmbus_txbr_empty(&chan->ch_txbr));
+}
+
+bool
+vmbus_chan_rx_empty(const struct vmbus_channel *chan)
+{
+
+	return (vmbus_rxbr_empty(&chan->ch_rxbr));
+}