X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_mbuf%2Frte_mbuf.h;h=ab6de676a10abf4e4b60e2e72ee6b819882d1e6b;hb=824cb29c0e7b8a2b3ed285546c3a39a8e0b3cd44;hp=70b098717f341f62fca13cf525a02bf1bcaf51bc;hpb=11f51a26d3e3a3cf78efa4c0a20d6aa5b29117c2;p=dpdk.git

diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 70b098717f..ab6de676a1 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -217,6 +217,16 @@ const char *rte_get_rx_ol_flag_name(uint64_t mask);
  */
 const char *rte_get_tx_ol_flag_name(uint64_t mask);
 
+/**
+ * Some NICs need at least 2KB buffer to RX standard Ethernet frame without
+ * splitting it into multiple segments.
+ * So, for mbufs that planned to be involved into RX/TX, the recommended
+ * minimal buffer length is 2KB + RTE_PKTMBUF_HEADROOM.
+ */
+#define	RTE_MBUF_DEFAULT_DATAROOM	2048
+#define	RTE_MBUF_DEFAULT_BUF_SIZE	\
+	(RTE_MBUF_DEFAULT_DATAROOM + RTE_PKTMBUF_HEADROOM)
+
 /* define a set of marker types that can be used to refer to set points in the
  * mbuf */
 typedef void    *MARKER[0];   /**< generic marker for a point in a structure */