*/
#define PKT_TX_OFFLOAD_MASK (PKT_TX_VLAN_PKT | PKT_TX_IP_CKSUM | PKT_TX_L4_MASK)
+/* 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 */
+typedef uint64_t MARKER64[0]; /**< marker that allows us to overwrite 8 bytes
+ * with a single assignment */
/**
* The generic rte_mbuf, containing a packet mbuf.
*/
struct rte_mbuf {
+ MARKER cacheline0;
+
void *buf_addr; /**< Virtual address of segment buffer. */
phys_addr_t buf_physaddr; /**< Physical address of segment buffer. */
/* next 8 bytes are initialised on RX descriptor rearm */
+ MARKER64 rearm_data;
uint16_t buf_len; /**< Length of segment buffer. */
uint16_t data_off;
uint64_t ol_flags; /**< Offload features. */
/* remaining bytes are set on RX when pulling packet from descriptor */
+ MARKER rx_descriptor_fields1;
uint16_t reserved2; /**< Unused field. Required for padding */
uint16_t data_len; /**< Amount of data in segment buffer. */
uint32_t pkt_len; /**< Total pkt len: sum of all segments. */
- union {
- uint16_t l2_l3_len; /**< combined l2/l3 lengths as single var */
- struct {
- uint16_t l3_len:9; /**< L3 (IP) Header Length. */
- uint16_t l2_len:7; /**< L2 (MAC) Header Length. */
- };
- };
+ uint16_t reserved;
uint16_t vlan_tci; /**< VLAN Tag Control Identifier (CPU order) */
union {
uint32_t rss; /**< RSS hash result if RSS enabled */
uint32_t sched; /**< Hierarchical scheduler */
} hash; /**< hash information */
- /* fields only used in slow path or on TX */
+ /* second cache line - fields only used in slow path or on TX */
+ MARKER cacheline1 __rte_cache_aligned;
struct rte_mempool *pool; /**< Pool from which mbuf was allocated. */
struct rte_mbuf *next; /**< Next segment of scattered packet. */
+ /* fields to support TX offloads */
union {
- uint8_t metadata[0];
- uint16_t metadata16[0];
- uint32_t metadata32[0];
- uint64_t metadata64[0];
- } __rte_cache_aligned;
+ uint16_t l2_l3_len; /**< combined l2/l3 lengths as single var */
+ struct {
+ uint16_t l3_len:9; /**< L3 (IP) Header Length. */
+ uint16_t l2_len:7; /**< L2 (MAC) Header Length. */
+ };
+ };
} __rte_cache_aligned;
-#define RTE_MBUF_METADATA_UINT8(mbuf, offset) \
- (mbuf->metadata[offset])
-#define RTE_MBUF_METADATA_UINT16(mbuf, offset) \
- (mbuf->metadata16[offset/sizeof(uint16_t)])
-#define RTE_MBUF_METADATA_UINT32(mbuf, offset) \
- (mbuf->metadata32[offset/sizeof(uint32_t)])
-#define RTE_MBUF_METADATA_UINT64(mbuf, offset) \
- (mbuf->metadata64[offset/sizeof(uint64_t)])
-
-#define RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset) \
- (&mbuf->metadata[offset])
-#define RTE_MBUF_METADATA_UINT16_PTR(mbuf, offset) \
- (&mbuf->metadata16[offset/sizeof(uint16_t)])
-#define RTE_MBUF_METADATA_UINT32_PTR(mbuf, offset) \
- (&mbuf->metadata32[offset/sizeof(uint32_t)])
-#define RTE_MBUF_METADATA_UINT64_PTR(mbuf, offset) \
- (&mbuf->metadata64[offset/sizeof(uint64_t)])
-
/**
* Given the buf_addr returns the pointer to corresponding mbuf.
*/