[dpdk-dev] [PATCH v3 01/16] mbuf: redefinition of packet_type in rte_mbuf

[Helin Zhang]

In order to unify the packet type, the field of 'packet_type' in
'struct rte_mbuf' needs to be extended from 16 to 32 bits.
Accordingly, some fields in 'struct rte_mbuf' are re-organized to
support this change for Vector PMD. As 'struct rte_kni_mbuf' for
KNI should be right mapped to 'struct rte_mbuf', it should be
modified accordingly. In addition, Vector PMD of ixgbe is disabled
by default, as 'struct rte_mbuf' changed.

Signed-off-by: Helin Zhang <helin.zhang at intel.com>
Signed-off-by: Cunming Liang <cunming.liang at intel.com>
---
 config/common_linuxapp                             |  2 +-
 .../linuxapp/eal/include/exec-env/rte_kni_common.h |  4 ++--
 lib/librte_mbuf/rte_mbuf.h                         | 23 +++++++++++++++-------
 3 files changed, 19 insertions(+), 10 deletions(-)

v2 changes:
* Enlarged the packet_type field from 16 bits to 32 bits.
* Redefined the packet type sub-fields.
* Updated the 'struct rte_kni_mbuf' for KNI according to the mbuf changes.

v3 changes:
* Put the mbuf layout changes into a single patch.
* Disabled vector ixgbe PMD by default, as mbuf layout changed.

diff --git a/config/common_linuxapp b/config/common_linuxapp
index d428f84..7a530b9 100644
--- a/config/common_linuxapp
+++ b/config/common_linuxapp
@@ -160,7 +160,7 @@ CONFIG_RTE_LIBRTE_IXGBE_DEBUG_TX_FREE=n
 CONFIG_RTE_LIBRTE_IXGBE_DEBUG_DRIVER=n
 CONFIG_RTE_LIBRTE_IXGBE_PF_DISABLE_STRIP_CRC=n
 CONFIG_RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC=y
-CONFIG_RTE_IXGBE_INC_VECTOR=y
+CONFIG_RTE_IXGBE_INC_VECTOR=n
 CONFIG_RTE_IXGBE_RX_OLFLAGS_ENABLE=y
 
 #
diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
index 1e55c2d..bd1cc09 100644
--- a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
+++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
@@ -117,9 +117,9 @@ struct rte_kni_mbuf {
 	uint16_t data_off;      /**< Start address of data in segment buffer. */
 	char pad1[4];
 	uint64_t ol_flags;      /**< Offload features. */
-	char pad2[2];
-	uint16_t data_len;      /**< Amount of data in segment buffer. */
+	char pad2[4];
 	uint32_t pkt_len;       /**< Total pkt len: sum of all segment data_len. */
+	uint16_t data_len;      /**< Amount of data in segment buffer. */
 
 	/* fields on second cache line */
 	char pad3[8] __attribute__((__aligned__(RTE_CACHE_LINE_SIZE)));
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index e3008c6..6f8e1dd 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -259,17 +259,26 @@ struct rte_mbuf {
 	/* remaining bytes are set on RX when pulling packet from descriptor */
 	MARKER rx_descriptor_fields1;
 
-	/**
-	 * The packet type, which is used to indicate ordinary packet and also
-	 * tunneled packet format, i.e. each number is represented a type of
-	 * packet.
+	/*
+	 * The packet type, which is the combination of outer/inner L2, L3, L4
+	 * and tunnel types.
 	 */
-	uint16_t packet_type;
+	union {
+		uint32_t packet_type; /**< L2/L3/L4 and tunnel information. */
+		struct {
+			uint32_t l2_type:4; /**< (Outer) L2 type. */
+			uint32_t l3_type:4; /**< (Outer) L3 type. */
+			uint32_t l4_type:4; /**< (Outer) L4 type. */
+			uint32_t tun_type:4; /**< Tunnel type. */
+			uint32_t inner_l2_type:4; /**< Inner L2 type. */
+			uint32_t inner_l3_type:4; /**< Inner L3 type. */
+			uint32_t inner_l4_type:4; /**< Inner L4 type. */
+		};
+	};
 
-	uint16_t data_len;        /**< Amount of data in segment buffer. */
 	uint32_t pkt_len;         /**< Total pkt len: sum of all segments. */
+	uint16_t data_len;        /**< Amount of data in segment buffer. */
 	uint16_t vlan_tci;        /**< VLAN Tag Control Identifier (CPU order) */
-	uint16_t reserved;
 	union {
 		uint32_t rss;     /**< RSS hash result if RSS enabled */
 		struct {
-- 
1.9.3