1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation.
3 * Copyright 2014 6WIND S.A.
6 #ifndef _RTE_MBUF_CORE_H_
7 #define _RTE_MBUF_CORE_H_
11 * This file contains definion of RTE mbuf structure itself,
12 * packet offload flags and some related macros.
13 * For majority of DPDK entities, it is not recommended to include
14 * this file directly, use include <rte_mbuf.h> instead.
16 * New fields and flags should fit in the "dynamic space".
20 #include <rte_compat.h>
21 #include <generic/rte_atomic.h>
28 * Packet Offload Features Flags. It also carry packet type information.
29 * Critical resources. Both rx/tx shared these bits. Be cautious on any change
31 * - RX flags start at bit position zero, and get added to the left of previous
33 * - The most-significant 3 bits are reserved for generic mbuf flags
34 * - TX flags therefore start at bit position 60 (i.e. 63-3), and new flags get
35 * added to the right of the previously defined flags i.e. they should count
36 * downwards, not upwards.
38 * Keep these flags synchronized with rte_get_rx_ol_flag_name() and
39 * rte_get_tx_ol_flag_name().
43 * The RX packet is a 802.1q VLAN packet, and the tci has been
44 * saved in in mbuf->vlan_tci.
45 * If the flag PKT_RX_VLAN_STRIPPED is also present, the VLAN
46 * header has been stripped from mbuf data, else it is still
49 #define PKT_RX_VLAN (1ULL << 0)
51 /** RX packet with RSS hash result. */
52 #define PKT_RX_RSS_HASH (1ULL << 1)
54 /** RX packet with FDIR match indicate. */
55 #define PKT_RX_FDIR (1ULL << 2)
59 * Checking this flag alone is deprecated: check the 2 bits of
60 * PKT_RX_L4_CKSUM_MASK.
61 * This flag was set when the L4 checksum of a packet was detected as
62 * wrong by the hardware.
64 #define PKT_RX_L4_CKSUM_BAD (1ULL << 3)
68 * Checking this flag alone is deprecated: check the 2 bits of
69 * PKT_RX_IP_CKSUM_MASK.
70 * This flag was set when the IP checksum of a packet was detected as
71 * wrong by the hardware.
73 #define PKT_RX_IP_CKSUM_BAD (1ULL << 4)
75 /** External IP header checksum error. */
76 #define PKT_RX_EIP_CKSUM_BAD (1ULL << 5)
79 * A vlan has been stripped by the hardware and its tci is saved in
80 * mbuf->vlan_tci. This can only happen if vlan stripping is enabled
81 * in the RX configuration of the PMD.
82 * When PKT_RX_VLAN_STRIPPED is set, PKT_RX_VLAN must also be set.
84 #define PKT_RX_VLAN_STRIPPED (1ULL << 6)
87 * Mask of bits used to determine the status of RX IP checksum.
88 * - PKT_RX_IP_CKSUM_UNKNOWN: no information about the RX IP checksum
89 * - PKT_RX_IP_CKSUM_BAD: the IP checksum in the packet is wrong
90 * - PKT_RX_IP_CKSUM_GOOD: the IP checksum in the packet is valid
91 * - PKT_RX_IP_CKSUM_NONE: the IP checksum is not correct in the packet
92 * data, but the integrity of the IP header is verified.
94 #define PKT_RX_IP_CKSUM_MASK ((1ULL << 4) | (1ULL << 7))
96 #define PKT_RX_IP_CKSUM_UNKNOWN 0
97 #define PKT_RX_IP_CKSUM_BAD (1ULL << 4)
98 #define PKT_RX_IP_CKSUM_GOOD (1ULL << 7)
99 #define PKT_RX_IP_CKSUM_NONE ((1ULL << 4) | (1ULL << 7))
102 * Mask of bits used to determine the status of RX L4 checksum.
103 * - PKT_RX_L4_CKSUM_UNKNOWN: no information about the RX L4 checksum
104 * - PKT_RX_L4_CKSUM_BAD: the L4 checksum in the packet is wrong
105 * - PKT_RX_L4_CKSUM_GOOD: the L4 checksum in the packet is valid
106 * - PKT_RX_L4_CKSUM_NONE: the L4 checksum is not correct in the packet
107 * data, but the integrity of the L4 data is verified.
109 #define PKT_RX_L4_CKSUM_MASK ((1ULL << 3) | (1ULL << 8))
111 #define PKT_RX_L4_CKSUM_UNKNOWN 0
112 #define PKT_RX_L4_CKSUM_BAD (1ULL << 3)
113 #define PKT_RX_L4_CKSUM_GOOD (1ULL << 8)
114 #define PKT_RX_L4_CKSUM_NONE ((1ULL << 3) | (1ULL << 8))
116 /** RX IEEE1588 L2 Ethernet PT Packet. */
117 #define PKT_RX_IEEE1588_PTP (1ULL << 9)
119 /** RX IEEE1588 L2/L4 timestamped packet.*/
120 #define PKT_RX_IEEE1588_TMST (1ULL << 10)
122 /** FD id reported if FDIR match. */
123 #define PKT_RX_FDIR_ID (1ULL << 13)
125 /** Flexible bytes reported if FDIR match. */
126 #define PKT_RX_FDIR_FLX (1ULL << 14)
129 * The 2 vlans have been stripped by the hardware and their tci are
130 * saved in mbuf->vlan_tci (inner) and mbuf->vlan_tci_outer (outer).
131 * This can only happen if vlan stripping is enabled in the RX
132 * configuration of the PMD.
133 * When PKT_RX_QINQ_STRIPPED is set, the flags (PKT_RX_VLAN |
134 * PKT_RX_VLAN_STRIPPED | PKT_RX_QINQ) must also be set.
136 #define PKT_RX_QINQ_STRIPPED (1ULL << 15)
139 * When packets are coalesced by a hardware or virtual driver, this flag
140 * can be set in the RX mbuf, meaning that the m->tso_segsz field is
141 * valid and is set to the segment size of original packets.
143 #define PKT_RX_LRO (1ULL << 16)
146 * Indicate that the timestamp field in the mbuf is valid.
148 #define PKT_RX_TIMESTAMP (1ULL << 17)
151 * Indicate that security offload processing was applied on the RX packet.
153 #define PKT_RX_SEC_OFFLOAD (1ULL << 18)
156 * Indicate that security offload processing failed on the RX packet.
158 #define PKT_RX_SEC_OFFLOAD_FAILED (1ULL << 19)
161 * The RX packet is a double VLAN, and the outer tci has been
162 * saved in in mbuf->vlan_tci_outer. If PKT_RX_QINQ set, PKT_RX_VLAN
163 * also should be set and inner tci should be saved to mbuf->vlan_tci.
164 * If the flag PKT_RX_QINQ_STRIPPED is also present, both VLANs
165 * headers have been stripped from mbuf data, else they are still
168 #define PKT_RX_QINQ (1ULL << 20)
171 * Mask of bits used to determine the status of outer RX L4 checksum.
172 * - PKT_RX_OUTER_L4_CKSUM_UNKNOWN: no info about the outer RX L4 checksum
173 * - PKT_RX_OUTER_L4_CKSUM_BAD: the outer L4 checksum in the packet is wrong
174 * - PKT_RX_OUTER_L4_CKSUM_GOOD: the outer L4 checksum in the packet is valid
175 * - PKT_RX_OUTER_L4_CKSUM_INVALID: invalid outer L4 checksum state.
177 * The detection of PKT_RX_OUTER_L4_CKSUM_GOOD shall be based on the given
178 * HW capability, At minimum, the PMD should support
179 * PKT_RX_OUTER_L4_CKSUM_UNKNOWN and PKT_RX_OUTER_L4_CKSUM_BAD states
180 * if the DEV_RX_OFFLOAD_OUTER_UDP_CKSUM offload is available.
182 #define PKT_RX_OUTER_L4_CKSUM_MASK ((1ULL << 21) | (1ULL << 22))
184 #define PKT_RX_OUTER_L4_CKSUM_UNKNOWN 0
185 #define PKT_RX_OUTER_L4_CKSUM_BAD (1ULL << 21)
186 #define PKT_RX_OUTER_L4_CKSUM_GOOD (1ULL << 22)
187 #define PKT_RX_OUTER_L4_CKSUM_INVALID ((1ULL << 21) | (1ULL << 22))
189 /* add new RX flags here, don't forget to update PKT_FIRST_FREE */
191 #define PKT_FIRST_FREE (1ULL << 23)
192 #define PKT_LAST_FREE (1ULL << 40)
194 /* add new TX flags here, don't forget to update PKT_LAST_FREE */
197 * Outer UDP checksum offload flag. This flag is used for enabling
198 * outer UDP checksum in PMD. To use outer UDP checksum, the user needs to
199 * 1) Enable the following in mbuf,
200 * a) Fill outer_l2_len and outer_l3_len in mbuf.
201 * b) Set the PKT_TX_OUTER_UDP_CKSUM flag.
202 * c) Set the PKT_TX_OUTER_IPV4 or PKT_TX_OUTER_IPV6 flag.
203 * 2) Configure DEV_TX_OFFLOAD_OUTER_UDP_CKSUM offload flag.
205 #define PKT_TX_OUTER_UDP_CKSUM (1ULL << 41)
208 * UDP Fragmentation Offload flag. This flag is used for enabling UDP
209 * fragmentation in SW or in HW. When use UFO, mbuf->tso_segsz is used
210 * to store the MSS of UDP fragments.
212 #define PKT_TX_UDP_SEG (1ULL << 42)
215 * Request security offload processing on the TX packet.
217 #define PKT_TX_SEC_OFFLOAD (1ULL << 43)
220 * Offload the MACsec. This flag must be set by the application to enable
221 * this offload feature for a packet to be transmitted.
223 #define PKT_TX_MACSEC (1ULL << 44)
226 * Bits 45:48 used for the tunnel type.
227 * The tunnel type must be specified for TSO or checksum on the inner part
229 * These flags can be used with PKT_TX_TCP_SEG for TSO, or PKT_TX_xxx_CKSUM.
230 * The mbuf fields for inner and outer header lengths are required:
231 * outer_l2_len, outer_l3_len, l2_len, l3_len, l4_len and tso_segsz for TSO.
233 #define PKT_TX_TUNNEL_VXLAN (0x1ULL << 45)
234 #define PKT_TX_TUNNEL_GRE (0x2ULL << 45)
235 #define PKT_TX_TUNNEL_IPIP (0x3ULL << 45)
236 #define PKT_TX_TUNNEL_GENEVE (0x4ULL << 45)
237 /** TX packet with MPLS-in-UDP RFC 7510 header. */
238 #define PKT_TX_TUNNEL_MPLSINUDP (0x5ULL << 45)
239 #define PKT_TX_TUNNEL_VXLAN_GPE (0x6ULL << 45)
240 #define PKT_TX_TUNNEL_GTP (0x7ULL << 45)
242 * Generic IP encapsulated tunnel type, used for TSO and checksum offload.
243 * It can be used for tunnels which are not standards or listed above.
244 * It is preferred to use specific tunnel flags like PKT_TX_TUNNEL_GRE
245 * or PKT_TX_TUNNEL_IPIP if possible.
246 * The ethdev must be configured with DEV_TX_OFFLOAD_IP_TNL_TSO.
247 * Outer and inner checksums are done according to the existing flags like
249 * Specific tunnel headers that contain payload length, sequence id
250 * or checksum are not expected to be updated.
252 #define PKT_TX_TUNNEL_IP (0xDULL << 45)
254 * Generic UDP encapsulated tunnel type, used for TSO and checksum offload.
255 * UDP tunnel type implies outer IP layer.
256 * It can be used for tunnels which are not standards or listed above.
257 * It is preferred to use specific tunnel flags like PKT_TX_TUNNEL_VXLAN
259 * The ethdev must be configured with DEV_TX_OFFLOAD_UDP_TNL_TSO.
260 * Outer and inner checksums are done according to the existing flags like
262 * Specific tunnel headers that contain payload length, sequence id
263 * or checksum are not expected to be updated.
265 #define PKT_TX_TUNNEL_UDP (0xEULL << 45)
266 /* add new TX TUNNEL type here */
267 #define PKT_TX_TUNNEL_MASK (0xFULL << 45)
270 * Double VLAN insertion (QinQ) request to driver, driver may offload the
271 * insertion based on device capability.
272 * mbuf 'vlan_tci' & 'vlan_tci_outer' must be valid when this flag is set.
274 #define PKT_TX_QINQ (1ULL << 49)
275 /* this old name is deprecated */
276 #define PKT_TX_QINQ_PKT PKT_TX_QINQ
279 * TCP segmentation offload. To enable this offload feature for a
280 * packet to be transmitted on hardware supporting TSO:
281 * - set the PKT_TX_TCP_SEG flag in mbuf->ol_flags (this flag implies
283 * - set the flag PKT_TX_IPV4 or PKT_TX_IPV6
284 * - if it's IPv4, set the PKT_TX_IP_CKSUM flag
285 * - fill the mbuf offload information: l2_len, l3_len, l4_len, tso_segsz
287 #define PKT_TX_TCP_SEG (1ULL << 50)
289 /** TX IEEE1588 packet to timestamp. */
290 #define PKT_TX_IEEE1588_TMST (1ULL << 51)
293 * Bits 52+53 used for L4 packet type with checksum enabled: 00: Reserved,
294 * 01: TCP checksum, 10: SCTP checksum, 11: UDP checksum. To use hardware
295 * L4 checksum offload, the user needs to:
296 * - fill l2_len and l3_len in mbuf
297 * - set the flags PKT_TX_TCP_CKSUM, PKT_TX_SCTP_CKSUM or PKT_TX_UDP_CKSUM
298 * - set the flag PKT_TX_IPV4 or PKT_TX_IPV6
300 #define PKT_TX_L4_NO_CKSUM (0ULL << 52) /**< Disable L4 cksum of TX pkt. */
302 /** TCP cksum of TX pkt. computed by NIC. */
303 #define PKT_TX_TCP_CKSUM (1ULL << 52)
305 /** SCTP cksum of TX pkt. computed by NIC. */
306 #define PKT_TX_SCTP_CKSUM (2ULL << 52)
308 /** UDP cksum of TX pkt. computed by NIC. */
309 #define PKT_TX_UDP_CKSUM (3ULL << 52)
311 /** Mask for L4 cksum offload request. */
312 #define PKT_TX_L4_MASK (3ULL << 52)
315 * Offload the IP checksum in the hardware. The flag PKT_TX_IPV4 should
316 * also be set by the application, although a PMD will only check
318 * - fill the mbuf offload information: l2_len, l3_len
320 #define PKT_TX_IP_CKSUM (1ULL << 54)
323 * Packet is IPv4. This flag must be set when using any offload feature
324 * (TSO, L3 or L4 checksum) to tell the NIC that the packet is an IPv4
325 * packet. If the packet is a tunneled packet, this flag is related to
328 #define PKT_TX_IPV4 (1ULL << 55)
331 * Packet is IPv6. This flag must be set when using an offload feature
332 * (TSO or L4 checksum) to tell the NIC that the packet is an IPv6
333 * packet. If the packet is a tunneled packet, this flag is related to
336 #define PKT_TX_IPV6 (1ULL << 56)
339 * VLAN tag insertion request to driver, driver may offload the insertion
340 * based on the device capability.
341 * mbuf 'vlan_tci' field must be valid when this flag is set.
343 #define PKT_TX_VLAN (1ULL << 57)
344 /* this old name is deprecated */
345 #define PKT_TX_VLAN_PKT PKT_TX_VLAN
348 * Offload the IP checksum of an external header in the hardware. The
349 * flag PKT_TX_OUTER_IPV4 should also be set by the application, although
350 * a PMD will only check PKT_TX_OUTER_IP_CKSUM.
351 * - fill the mbuf offload information: outer_l2_len, outer_l3_len
353 #define PKT_TX_OUTER_IP_CKSUM (1ULL << 58)
356 * Packet outer header is IPv4. This flag must be set when using any
357 * outer offload feature (L3 or L4 checksum) to tell the NIC that the
358 * outer header of the tunneled packet is an IPv4 packet.
360 #define PKT_TX_OUTER_IPV4 (1ULL << 59)
363 * Packet outer header is IPv6. This flag must be set when using any
364 * outer offload feature (L4 checksum) to tell the NIC that the outer
365 * header of the tunneled packet is an IPv6 packet.
367 #define PKT_TX_OUTER_IPV6 (1ULL << 60)
370 * Bitmask of all supported packet Tx offload features flags,
371 * which can be set for packet.
373 #define PKT_TX_OFFLOAD_MASK ( \
374 PKT_TX_OUTER_IPV6 | \
375 PKT_TX_OUTER_IPV4 | \
376 PKT_TX_OUTER_IP_CKSUM | \
382 PKT_TX_IEEE1588_TMST | \
385 PKT_TX_TUNNEL_MASK | \
387 PKT_TX_SEC_OFFLOAD | \
389 PKT_TX_OUTER_UDP_CKSUM)
392 * Mbuf having an external buffer attached. shinfo in mbuf must be filled.
394 #define EXT_ATTACHED_MBUF (1ULL << 61)
396 #define IND_ATTACHED_MBUF (1ULL << 62) /**< Indirect attached mbuf */
398 /** Alignment constraint of mbuf private area. */
399 #define RTE_MBUF_PRIV_ALIGN 8
402 * Some NICs need at least 2KB buffer to RX standard Ethernet frame without
403 * splitting it into multiple segments.
404 * So, for mbufs that planned to be involved into RX/TX, the recommended
405 * minimal buffer length is 2KB + RTE_PKTMBUF_HEADROOM.
407 #define RTE_MBUF_DEFAULT_DATAROOM 2048
408 #define RTE_MBUF_DEFAULT_BUF_SIZE \
409 (RTE_MBUF_DEFAULT_DATAROOM + RTE_PKTMBUF_HEADROOM)
411 struct rte_mbuf_sched {
412 uint32_t queue_id; /**< Queue ID. */
413 uint8_t traffic_class;
414 /**< Traffic class ID. Traffic class 0
415 * is the highest priority traffic class.
418 /**< Color. @see enum rte_color.*/
419 uint16_t reserved; /**< Reserved. */
420 }; /**< Hierarchical scheduler */
423 * enum for the tx_offload bit-fields lengths and offsets.
424 * defines the layout of rte_mbuf tx_offload field.
427 RTE_MBUF_L2_LEN_BITS = 7,
428 RTE_MBUF_L3_LEN_BITS = 9,
429 RTE_MBUF_L4_LEN_BITS = 8,
430 RTE_MBUF_TSO_SEGSZ_BITS = 16,
431 RTE_MBUF_OUTL3_LEN_BITS = 9,
432 RTE_MBUF_OUTL2_LEN_BITS = 7,
433 RTE_MBUF_TXOFLD_UNUSED_BITS = sizeof(uint64_t) * CHAR_BIT -
434 RTE_MBUF_L2_LEN_BITS -
435 RTE_MBUF_L3_LEN_BITS -
436 RTE_MBUF_L4_LEN_BITS -
437 RTE_MBUF_TSO_SEGSZ_BITS -
438 RTE_MBUF_OUTL3_LEN_BITS -
439 RTE_MBUF_OUTL2_LEN_BITS,
440 #if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
441 RTE_MBUF_L2_LEN_OFS =
442 sizeof(uint64_t) * CHAR_BIT - RTE_MBUF_L2_LEN_BITS,
443 RTE_MBUF_L3_LEN_OFS = RTE_MBUF_L2_LEN_OFS - RTE_MBUF_L3_LEN_BITS,
444 RTE_MBUF_L4_LEN_OFS = RTE_MBUF_L3_LEN_OFS - RTE_MBUF_L4_LEN_BITS,
445 RTE_MBUF_TSO_SEGSZ_OFS = RTE_MBUF_L4_LEN_OFS - RTE_MBUF_TSO_SEGSZ_BITS,
446 RTE_MBUF_OUTL3_LEN_OFS =
447 RTE_MBUF_TSO_SEGSZ_OFS - RTE_MBUF_OUTL3_LEN_BITS,
448 RTE_MBUF_OUTL2_LEN_OFS =
449 RTE_MBUF_OUTL3_LEN_OFS - RTE_MBUF_OUTL2_LEN_BITS,
450 RTE_MBUF_TXOFLD_UNUSED_OFS =
451 RTE_MBUF_OUTL2_LEN_OFS - RTE_MBUF_TXOFLD_UNUSED_BITS,
453 RTE_MBUF_L2_LEN_OFS = 0,
454 RTE_MBUF_L3_LEN_OFS = RTE_MBUF_L2_LEN_OFS + RTE_MBUF_L2_LEN_BITS,
455 RTE_MBUF_L4_LEN_OFS = RTE_MBUF_L3_LEN_OFS + RTE_MBUF_L3_LEN_BITS,
456 RTE_MBUF_TSO_SEGSZ_OFS = RTE_MBUF_L4_LEN_OFS + RTE_MBUF_L4_LEN_BITS,
457 RTE_MBUF_OUTL3_LEN_OFS =
458 RTE_MBUF_TSO_SEGSZ_OFS + RTE_MBUF_TSO_SEGSZ_BITS,
459 RTE_MBUF_OUTL2_LEN_OFS =
460 RTE_MBUF_OUTL3_LEN_OFS + RTE_MBUF_OUTL3_LEN_BITS,
461 RTE_MBUF_TXOFLD_UNUSED_OFS =
462 RTE_MBUF_OUTL2_LEN_OFS + RTE_MBUF_OUTL2_LEN_BITS,
467 * The generic rte_mbuf, containing a packet mbuf.
470 RTE_MARKER cacheline0;
472 void *buf_addr; /**< Virtual address of segment buffer. */
474 * Physical address of segment buffer.
475 * Force alignment to 8-bytes, so as to ensure we have the exact
476 * same mbuf cacheline0 layout for 32-bit and 64-bit. This makes
477 * working on vector drivers easier.
482 rte_iova_t buf_physaddr; /**< deprecated */
483 } __rte_aligned(sizeof(rte_iova_t));
485 /* next 8 bytes are initialised on RX descriptor rearm */
486 RTE_MARKER64 rearm_data;
490 * Reference counter. Its size should at least equal to the size
491 * of port field (16 bits), to support zero-copy broadcast.
492 * It should only be accessed using the following functions:
493 * rte_mbuf_refcnt_update(), rte_mbuf_refcnt_read(), and
494 * rte_mbuf_refcnt_set(). The functionality of these functions (atomic,
495 * or non-atomic) is controlled by the CONFIG_RTE_MBUF_REFCNT_ATOMIC
500 rte_atomic16_t refcnt_atomic; /**< Atomically accessed refcnt */
501 /** Non-atomically accessed refcnt */
504 uint16_t nb_segs; /**< Number of segments. */
506 /** Input port (16 bits to support more than 256 virtual ports).
507 * The event eth Tx adapter uses this field to specify the output port.
511 uint64_t ol_flags; /**< Offload features. */
513 /* remaining bytes are set on RX when pulling packet from descriptor */
514 RTE_MARKER rx_descriptor_fields1;
517 * The packet type, which is the combination of outer/inner L2, L3, L4
518 * and tunnel types. The packet_type is about data really present in the
519 * mbuf. Example: if vlan stripping is enabled, a received vlan packet
520 * would have RTE_PTYPE_L2_ETHER and not RTE_PTYPE_L2_VLAN because the
521 * vlan is stripped from the data.
525 uint32_t packet_type; /**< L2/L3/L4 and tunnel information. */
528 uint8_t l2_type:4; /**< (Outer) L2 type. */
529 uint8_t l3_type:4; /**< (Outer) L3 type. */
530 uint8_t l4_type:4; /**< (Outer) L4 type. */
531 uint8_t tun_type:4; /**< Tunnel type. */
534 uint8_t inner_esp_next_proto;
535 /**< ESP next protocol type, valid if
536 * RTE_PTYPE_TUNNEL_ESP tunnel type is set
541 uint8_t inner_l2_type:4;
542 /**< Inner L2 type. */
543 uint8_t inner_l3_type:4;
544 /**< Inner L3 type. */
547 uint8_t inner_l4_type:4; /**< Inner L4 type. */
551 uint32_t pkt_len; /**< Total pkt len: sum of all segments. */
552 uint16_t data_len; /**< Amount of data in segment buffer. */
553 /** VLAN TCI (CPU order), valid if PKT_RX_VLAN is set. */
559 uint32_t rss; /**< RSS hash result if RSS enabled */
567 /**< Second 4 flexible bytes */
570 /**< First 4 flexible bytes or FD ID, dependent
571 * on PKT_RX_FDIR_* flag in ol_flags.
573 } fdir; /**< Filter identifier if FDIR enabled */
574 struct rte_mbuf_sched sched;
575 /**< Hierarchical scheduler : 8 bytes */
580 /**< The event eth Tx adapter uses this field
581 * to store Tx queue id.
582 * @see rte_event_eth_tx_adapter_txq_set()
584 } txadapter; /**< Eventdev ethdev Tx adapter */
585 /**< User defined tags. See rte_distributor_process() */
587 } hash; /**< hash information */
590 /** Outer VLAN TCI (CPU order), valid if PKT_RX_QINQ is set. */
591 uint16_t vlan_tci_outer;
593 uint16_t buf_len; /**< Length of segment buffer. */
595 /** Valid if PKT_RX_TIMESTAMP is set. The unit and time reference
596 * are not normalized but are always the same for a given port.
597 * Some devices allow to query rte_eth_read_clock that will return the
598 * current device timestamp.
602 /* second cache line - fields only used in slow path or on TX */
603 RTE_MARKER cacheline1 __rte_cache_min_aligned;
607 void *userdata; /**< Can be used for external metadata */
608 uint64_t udata64; /**< Allow 8-byte userdata on 32-bit */
611 struct rte_mempool *pool; /**< Pool from which mbuf was allocated. */
612 struct rte_mbuf *next; /**< Next segment of scattered packet. */
614 /* fields to support TX offloads */
617 uint64_t tx_offload; /**< combined for easy fetch */
620 uint64_t l2_len:RTE_MBUF_L2_LEN_BITS;
621 /**< L2 (MAC) Header Length for non-tunneling pkt.
622 * Outer_L4_len + ... + Inner_L2_len for tunneling pkt.
624 uint64_t l3_len:RTE_MBUF_L3_LEN_BITS;
625 /**< L3 (IP) Header Length. */
626 uint64_t l4_len:RTE_MBUF_L4_LEN_BITS;
627 /**< L4 (TCP/UDP) Header Length. */
628 uint64_t tso_segsz:RTE_MBUF_TSO_SEGSZ_BITS;
629 /**< TCP TSO segment size */
632 * Fields for Tx offloading of tunnels.
633 * These are undefined for packets which don't request
634 * any tunnel offloads (outer IP or UDP checksum,
637 * PMDs should not use these fields unconditionally
638 * when calculating offsets.
640 * Applications are expected to set appropriate tunnel
641 * offload flags when they fill in these fields.
643 uint64_t outer_l3_len:RTE_MBUF_OUTL3_LEN_BITS;
644 /**< Outer L3 (IP) Hdr Length. */
645 uint64_t outer_l2_len:RTE_MBUF_OUTL2_LEN_BITS;
646 /**< Outer L2 (MAC) Hdr Length. */
648 /* uint64_t unused:RTE_MBUF_TXOFLD_UNUSED_BITS; */
652 /** Size of the application private data. In case of an indirect
653 * mbuf, it stores the direct mbuf private data size.
657 /** Timesync flags for use with IEEE1588. */
660 /** Sequence number. See also rte_reorder_insert(). */
663 /** Shared data for external buffer attached to mbuf. See
664 * rte_pktmbuf_attach_extbuf().
666 struct rte_mbuf_ext_shared_info *shinfo;
668 uint64_t dynfield1[2]; /**< Reserved for dynamic fields. */
669 } __rte_cache_aligned;
672 * Function typedef of callback to free externally attached buffer.
674 typedef void (*rte_mbuf_extbuf_free_callback_t)(void *addr, void *opaque);
677 * Shared data at the end of an external buffer.
679 struct rte_mbuf_ext_shared_info {
680 rte_mbuf_extbuf_free_callback_t free_cb; /**< Free callback function */
681 void *fcb_opaque; /**< Free callback argument */
682 rte_atomic16_t refcnt_atomic; /**< Atomically accessed refcnt */
685 /**< Maximum number of nb_segs allowed. */
686 #define RTE_MBUF_MAX_NB_SEGS UINT16_MAX
689 * Returns TRUE if given mbuf is cloned by mbuf indirection, or FALSE
692 * If a mbuf has its data in another mbuf and references it by mbuf
693 * indirection, this mbuf can be defined as a cloned mbuf.
695 #define RTE_MBUF_CLONED(mb) ((mb)->ol_flags & IND_ATTACHED_MBUF)
698 * Returns TRUE if given mbuf has an external buffer, or FALSE otherwise.
700 * External buffer is a user-provided anonymous buffer.
702 #define RTE_MBUF_HAS_EXTBUF(mb) ((mb)->ol_flags & EXT_ATTACHED_MBUF)
705 * Returns TRUE if given mbuf is direct, or FALSE otherwise.
707 * If a mbuf embeds its own data after the rte_mbuf structure, this mbuf
708 * can be defined as a direct mbuf.
710 #define RTE_MBUF_DIRECT(mb) \
711 (!((mb)->ol_flags & (IND_ATTACHED_MBUF | EXT_ATTACHED_MBUF)))
713 #define MBUF_INVALID_PORT UINT16_MAX
716 * A macro that points to an offset into the data in the mbuf.
718 * The returned pointer is cast to type t. Before using this
719 * function, the user must ensure that the first segment is large
720 * enough to accommodate its data.
725 * The offset into the mbuf data.
727 * The type to cast the result into.
729 #define rte_pktmbuf_mtod_offset(m, t, o) \
730 ((t)((char *)(m)->buf_addr + (m)->data_off + (o)))
733 * A macro that points to the start of the data in the mbuf.
735 * The returned pointer is cast to type t. Before using this
736 * function, the user must ensure that the first segment is large
737 * enough to accommodate its data.
742 * The type to cast the result into.
744 #define rte_pktmbuf_mtod(m, t) rte_pktmbuf_mtod_offset(m, t, 0)
747 * A macro that returns the IO address that points to an offset of the
748 * start of the data in the mbuf
753 * The offset into the data to calculate address from.
755 #define rte_pktmbuf_iova_offset(m, o) \
756 (rte_iova_t)((m)->buf_iova + (m)->data_off + (o))
759 * A macro that returns the IO address that points to the start of the
765 #define rte_pktmbuf_iova(m) rte_pktmbuf_iova_offset(m, 0)
771 #endif /* _RTE_MBUF_CORE_H_ */