From 6c50564724bcce292fbe76010d637390c17d407a Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Sat, 27 May 2006 13:39:45 +0000
Subject: Make PKB_ZLEN the minimum possible size of packet buffer (to allow
 for hardware that can't autopad).

---
 src/include/gpxe/pkbuff.h | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/include')

diff --git a/src/include/gpxe/pkbuff.h b/src/include/gpxe/pkbuff.h
index 92244fd59..6c504029f 100644
--- a/src/include/gpxe/pkbuff.h
+++ b/src/include/gpxe/pkbuff.h
@@ -28,6 +28,15 @@ struct ll_protocol;
  */
 #define PKBUFF_ALIGN 2048
 
+/**
+ * Minimum packet buffer length
+ *
+ * alloc_pkb() will round up the allocated length to this size if
+ * necessary.  This is used on behalf of hardware that is not capable
+ * of auto-padding.
+ */
+#define PKB_ZLEN 64
+
 /** A packet buffer
  *
  * This structure is used to represent a network packet within gPXE.
-- 
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