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From: Kip Macy <kmacy@FreeBSD.org>
Date: Fri, 5 Dec 2008 21:16:13 +0000 (UTC)
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Subject: svn commit: r185649 - in user/kmacy/HEAD_fast_multi_xmit/sys: net
	sys
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Author: kmacy
Date: Fri Dec  5 21:16:13 2008
New Revision: 185649
URL: http://svn.freebsd.org/changeset/base/185649

Log:
  add inline helper functions for buf_ring enqueue and free

Modified:
  user/kmacy/HEAD_fast_multi_xmit/sys/net/if_var.h
  user/kmacy/HEAD_fast_multi_xmit/sys/sys/buf_ring.h

Modified: user/kmacy/HEAD_fast_multi_xmit/sys/net/if_var.h
==============================================================================
--- user/kmacy/HEAD_fast_multi_xmit/sys/net/if_var.h	Fri Dec  5 21:14:30 2008	(r185648)
+++ user/kmacy/HEAD_fast_multi_xmit/sys/net/if_var.h	Fri Dec  5 21:16:13 2008	(r185649)
@@ -82,6 +82,7 @@ struct  ifvlantrunk;
 #include <sys/mutex.h>		/* XXX */
 #include <sys/event.h>		/* XXX */
 #include <sys/_task.h>
+#include <sys/buf_ring.h>
 
 #define	IF_DUNIT_NONE	-1
 
@@ -540,6 +541,34 @@ do {									\
 	IFQ_PURGE(ifq);							\
 } while (0)
 
+
+static __inline int
+drbr_enqueue(struct buf_ring *br, struct mbuf *m)
+{	
+	int error = 0;
+
+	if ((error = buf_ring_enqueue(br, m)) == ENOBUFS) {
+		br->br_drops++;
+		m_freem(m);
+	}
+
+	return (error);
+}
+
+static __inline void
+drbr_free(struct buf_ring *br, struct malloc_type *type)
+{
+	struct mbuf *m;
+
+	while ((m = buf_ring_dequeue_sc(br)) != NULL)
+		m_freem(m);
+
+	buf_ring_free(br, type);
+}
+
+
+
+
 /*
  * 72 was chosen below because it is the size of a TCP/IP
  * header (40) + the minimum mss (32).

Modified: user/kmacy/HEAD_fast_multi_xmit/sys/sys/buf_ring.h
==============================================================================
--- user/kmacy/HEAD_fast_multi_xmit/sys/sys/buf_ring.h	Fri Dec  5 21:14:30 2008	(r185648)
+++ user/kmacy/HEAD_fast_multi_xmit/sys/sys/buf_ring.h	Fri Dec  5 21:16:13 2008	(r185649)
@@ -48,10 +48,11 @@ struct buf_ring {
 	volatile uint32_t	br_prod_tail;	
 	int              	br_prod_size;
 	int              	br_prod_mask;
+	uint64_t		br_drops;
 	/*
 	 * Pad out to next L2 cache line
 	 */
-	uint64_t	  	_pad0[14];
+	uint64_t	  	_pad0[13];
 
 	volatile uint32_t	br_cons_head;
 	volatile uint32_t	br_cons_tail;