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".
21 #include <rte_compat.h>
22 #include <rte_byteorder.h>
29 * Packet Offload Features Flags. It also carry packet type information.
30 * Critical resources. Both rx/tx shared these bits. Be cautious on any change
32 * - RX flags start at bit position zero, and get added to the left of previous
34 * - The most-significant 3 bits are reserved for generic mbuf flags
35 * - TX flags therefore start at bit position 60 (i.e. 63-3), and new flags get
36 * added to the right of the previously defined flags i.e. they should count
37 * downwards, not upwards.
39 * Keep these flags synchronized with rte_get_rx_ol_flag_name() and
40 * rte_get_tx_ol_flag_name().
44 * The RX packet is a 802.1q VLAN packet, and the tci has been
45 * saved in in mbuf->vlan_tci.
46 * If the flag RTE_MBUF_F_RX_VLAN_STRIPPED is also present, the VLAN
47 * header has been stripped from mbuf data, else it is still
50 #define RTE_MBUF_F_RX_VLAN (1ULL << 0)
52 /** RX packet with RSS hash result. */
53 #define RTE_MBUF_F_RX_RSS_HASH (1ULL << 1)
55 /** RX packet with FDIR match indicate. */
56 #define RTE_MBUF_F_RX_FDIR (1ULL << 2)
60 * Checking this flag alone is deprecated: check the 2 bits of
61 * RTE_MBUF_F_RX_L4_CKSUM_MASK.
62 * This flag was set when the L4 checksum of a packet was detected as
63 * wrong by the hardware.
65 #define RTE_MBUF_F_RX_L4_CKSUM_BAD (1ULL << 3)
69 * Checking this flag alone is deprecated: check the 2 bits of
70 * RTE_MBUF_F_RX_IP_CKSUM_MASK.
71 * This flag was set when the IP checksum of a packet was detected as
72 * wrong by the hardware.
74 #define RTE_MBUF_F_RX_IP_CKSUM_BAD (1ULL << 4)
77 * This flag is set when the outermost IP header checksum is detected as
78 * wrong by the hardware.
80 #define RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD (1ULL << 5)
84 * This flag has been renamed, use RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD instead.
86 #define RTE_MBUF_F_RX_EIP_CKSUM_BAD \
87 RTE_DEPRECATED(RTE_MBUF_F_RX_EIP_CKSUM_BAD) RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD
90 * A vlan has been stripped by the hardware and its tci is saved in
91 * mbuf->vlan_tci. This can only happen if vlan stripping is enabled
92 * in the RX configuration of the PMD.
93 * When RTE_MBUF_F_RX_VLAN_STRIPPED is set, RTE_MBUF_F_RX_VLAN must also be set.
95 #define RTE_MBUF_F_RX_VLAN_STRIPPED (1ULL << 6)
98 * Mask of bits used to determine the status of RX IP checksum.
99 * - RTE_MBUF_F_RX_IP_CKSUM_UNKNOWN: no information about the RX IP checksum
100 * - RTE_MBUF_F_RX_IP_CKSUM_BAD: the IP checksum in the packet is wrong
101 * - RTE_MBUF_F_RX_IP_CKSUM_GOOD: the IP checksum in the packet is valid
102 * - RTE_MBUF_F_RX_IP_CKSUM_NONE: the IP checksum is not correct in the packet
103 * data, but the integrity of the IP header is verified.
105 #define RTE_MBUF_F_RX_IP_CKSUM_MASK ((1ULL << 4) | (1ULL << 7))
107 #define RTE_MBUF_F_RX_IP_CKSUM_UNKNOWN 0
108 #define RTE_MBUF_F_RX_IP_CKSUM_BAD (1ULL << 4)
109 #define RTE_MBUF_F_RX_IP_CKSUM_GOOD (1ULL << 7)
110 #define RTE_MBUF_F_RX_IP_CKSUM_NONE ((1ULL << 4) | (1ULL << 7))
113 * Mask of bits used to determine the status of RX L4 checksum.
114 * - RTE_MBUF_F_RX_L4_CKSUM_UNKNOWN: no information about the RX L4 checksum
115 * - RTE_MBUF_F_RX_L4_CKSUM_BAD: the L4 checksum in the packet is wrong
116 * - RTE_MBUF_F_RX_L4_CKSUM_GOOD: the L4 checksum in the packet is valid
117 * - RTE_MBUF_F_RX_L4_CKSUM_NONE: the L4 checksum is not correct in the packet
118 * data, but the integrity of the L4 data is verified.
120 #define RTE_MBUF_F_RX_L4_CKSUM_MASK ((1ULL << 3) | (1ULL << 8))
122 #define RTE_MBUF_F_RX_L4_CKSUM_UNKNOWN 0
123 #define RTE_MBUF_F_RX_L4_CKSUM_BAD (1ULL << 3)
124 #define RTE_MBUF_F_RX_L4_CKSUM_GOOD (1ULL << 8)
125 #define RTE_MBUF_F_RX_L4_CKSUM_NONE ((1ULL << 3) | (1ULL << 8))
127 /** RX IEEE1588 L2 Ethernet PT Packet. */
128 #define RTE_MBUF_F_RX_IEEE1588_PTP (1ULL << 9)
130 /** RX IEEE1588 L2/L4 timestamped packet.*/
131 #define RTE_MBUF_F_RX_IEEE1588_TMST (1ULL << 10)
133 /** FD id reported if FDIR match. */
134 #define RTE_MBUF_F_RX_FDIR_ID (1ULL << 13)
136 /** Flexible bytes reported if FDIR match. */
137 #define RTE_MBUF_F_RX_FDIR_FLX (1ULL << 14)
140 * The outer VLAN has been stripped by the hardware and its TCI is
141 * saved in mbuf->vlan_tci_outer.
142 * This can only happen if VLAN stripping is enabled in the Rx
143 * configuration of the PMD.
144 * When RTE_MBUF_F_RX_QINQ_STRIPPED is set, the flags RTE_MBUF_F_RX_VLAN and RTE_MBUF_F_RX_QINQ
147 * - If both RTE_MBUF_F_RX_QINQ_STRIPPED and RTE_MBUF_F_RX_VLAN_STRIPPED are set, the 2 VLANs
148 * have been stripped by the hardware and their TCIs are saved in
149 * mbuf->vlan_tci (inner) and mbuf->vlan_tci_outer (outer).
150 * - If RTE_MBUF_F_RX_QINQ_STRIPPED is set and RTE_MBUF_F_RX_VLAN_STRIPPED is unset, only the
151 * outer VLAN is removed from packet data, but both tci are saved in
152 * mbuf->vlan_tci (inner) and mbuf->vlan_tci_outer (outer).
154 #define RTE_MBUF_F_RX_QINQ_STRIPPED (1ULL << 15)
157 * When packets are coalesced by a hardware or virtual driver, this flag
158 * can be set in the RX mbuf, meaning that the m->tso_segsz field is
159 * valid and is set to the segment size of original packets.
161 #define RTE_MBUF_F_RX_LRO (1ULL << 16)
163 /* There is no flag defined at offset 17. It is free for any future use. */
166 * Indicate that security offload processing was applied on the RX packet.
168 #define RTE_MBUF_F_RX_SEC_OFFLOAD (1ULL << 18)
171 * Indicate that security offload processing failed on the RX packet.
173 #define RTE_MBUF_F_RX_SEC_OFFLOAD_FAILED (1ULL << 19)
176 * The RX packet is a double VLAN, and the outer tci has been
177 * saved in mbuf->vlan_tci_outer. If this flag is set, RTE_MBUF_F_RX_VLAN
178 * must also be set and the inner tci is saved in mbuf->vlan_tci.
179 * If the flag RTE_MBUF_F_RX_QINQ_STRIPPED is also present, both VLANs
180 * headers have been stripped from mbuf data, else they are still
183 #define RTE_MBUF_F_RX_QINQ (1ULL << 20)
186 * Mask of bits used to determine the status of outer RX L4 checksum.
187 * - RTE_MBUF_F_RX_OUTER_L4_CKSUM_UNKNOWN: no info about the outer RX L4 checksum
188 * - RTE_MBUF_F_RX_OUTER_L4_CKSUM_BAD: the outer L4 checksum in the packet is wrong
189 * - RTE_MBUF_F_RX_OUTER_L4_CKSUM_GOOD: the outer L4 checksum in the packet is valid
190 * - RTE_MBUF_F_RX_OUTER_L4_CKSUM_INVALID: invalid outer L4 checksum state.
192 * The detection of RTE_MBUF_F_RX_OUTER_L4_CKSUM_GOOD shall be based on the given
193 * HW capability, At minimum, the PMD should support
194 * RTE_MBUF_F_RX_OUTER_L4_CKSUM_UNKNOWN and RTE_MBUF_F_RX_OUTER_L4_CKSUM_BAD states
195 * if the DEV_RX_OFFLOAD_OUTER_UDP_CKSUM offload is available.
197 #define RTE_MBUF_F_RX_OUTER_L4_CKSUM_MASK ((1ULL << 21) | (1ULL << 22))
199 #define RTE_MBUF_F_RX_OUTER_L4_CKSUM_UNKNOWN 0
200 #define RTE_MBUF_F_RX_OUTER_L4_CKSUM_BAD (1ULL << 21)
201 #define RTE_MBUF_F_RX_OUTER_L4_CKSUM_GOOD (1ULL << 22)
202 #define RTE_MBUF_F_RX_OUTER_L4_CKSUM_INVALID ((1ULL << 21) | (1ULL << 22))
204 /* add new RX flags here, don't forget to update RTE_MBUF_F_FIRST_FREE */
206 #define RTE_MBUF_F_FIRST_FREE (1ULL << 23)
207 #define RTE_MBUF_F_LAST_FREE (1ULL << 40)
209 /* add new TX flags here, don't forget to update RTE_MBUF_F_LAST_FREE */
212 * Outer UDP checksum offload flag. This flag is used for enabling
213 * outer UDP checksum in PMD. To use outer UDP checksum, the user needs to
214 * 1) Enable the following in mbuf,
215 * a) Fill outer_l2_len and outer_l3_len in mbuf.
216 * b) Set the RTE_MBUF_F_TX_OUTER_UDP_CKSUM flag.
217 * c) Set the RTE_MBUF_F_TX_OUTER_IPV4 or RTE_MBUF_F_TX_OUTER_IPV6 flag.
218 * 2) Configure DEV_TX_OFFLOAD_OUTER_UDP_CKSUM offload flag.
220 #define RTE_MBUF_F_TX_OUTER_UDP_CKSUM (1ULL << 41)
223 * UDP Fragmentation Offload flag. This flag is used for enabling UDP
224 * fragmentation in SW or in HW. When use UFO, mbuf->tso_segsz is used
225 * to store the MSS of UDP fragments.
227 #define RTE_MBUF_F_TX_UDP_SEG (1ULL << 42)
230 * Request security offload processing on the TX packet.
232 #define RTE_MBUF_F_TX_SEC_OFFLOAD (1ULL << 43)
235 * Offload the MACsec. This flag must be set by the application to enable
236 * this offload feature for a packet to be transmitted.
238 #define RTE_MBUF_F_TX_MACSEC (1ULL << 44)
241 * Bits 45:48 used for the tunnel type.
242 * The tunnel type must be specified for TSO or checksum on the inner part
244 * These flags can be used with RTE_MBUF_F_TX_TCP_SEG for TSO, or RTE_MBUF_F_TX_xxx_CKSUM.
245 * The mbuf fields for inner and outer header lengths are required:
246 * outer_l2_len, outer_l3_len, l2_len, l3_len, l4_len and tso_segsz for TSO.
248 #define RTE_MBUF_F_TX_TUNNEL_VXLAN (0x1ULL << 45)
249 #define RTE_MBUF_F_TX_TUNNEL_GRE (0x2ULL << 45)
250 #define RTE_MBUF_F_TX_TUNNEL_IPIP (0x3ULL << 45)
251 #define RTE_MBUF_F_TX_TUNNEL_GENEVE (0x4ULL << 45)
252 /** TX packet with MPLS-in-UDP RFC 7510 header. */
253 #define RTE_MBUF_F_TX_TUNNEL_MPLSINUDP (0x5ULL << 45)
254 #define RTE_MBUF_F_TX_TUNNEL_VXLAN_GPE (0x6ULL << 45)
255 #define RTE_MBUF_F_TX_TUNNEL_GTP (0x7ULL << 45)
257 * Generic IP encapsulated tunnel type, used for TSO and checksum offload.
258 * It can be used for tunnels which are not standards or listed above.
259 * It is preferred to use specific tunnel flags like RTE_MBUF_F_TX_TUNNEL_GRE
260 * or RTE_MBUF_F_TX_TUNNEL_IPIP if possible.
261 * The ethdev must be configured with DEV_TX_OFFLOAD_IP_TNL_TSO.
262 * Outer and inner checksums are done according to the existing flags like
263 * RTE_MBUF_F_TX_xxx_CKSUM.
264 * Specific tunnel headers that contain payload length, sequence id
265 * or checksum are not expected to be updated.
267 #define RTE_MBUF_F_TX_TUNNEL_IP (0xDULL << 45)
269 * Generic UDP encapsulated tunnel type, used for TSO and checksum offload.
270 * UDP tunnel type implies outer IP layer.
271 * It can be used for tunnels which are not standards or listed above.
272 * It is preferred to use specific tunnel flags like RTE_MBUF_F_TX_TUNNEL_VXLAN
274 * The ethdev must be configured with DEV_TX_OFFLOAD_UDP_TNL_TSO.
275 * Outer and inner checksums are done according to the existing flags like
276 * RTE_MBUF_F_TX_xxx_CKSUM.
277 * Specific tunnel headers that contain payload length, sequence id
278 * or checksum are not expected to be updated.
280 #define RTE_MBUF_F_TX_TUNNEL_UDP (0xEULL << 45)
281 /* add new TX TUNNEL type here */
282 #define RTE_MBUF_F_TX_TUNNEL_MASK (0xFULL << 45)
285 * Double VLAN insertion (QinQ) request to driver, driver may offload the
286 * insertion based on device capability.
287 * mbuf 'vlan_tci' & 'vlan_tci_outer' must be valid when this flag is set.
289 #define RTE_MBUF_F_TX_QINQ (1ULL << 49)
290 /** This old name is deprecated. */
291 #define RTE_MBUF_F_TX_QINQ_PKT RTE_MBUF_F_TX_QINQ
294 * TCP segmentation offload. To enable this offload feature for a
295 * packet to be transmitted on hardware supporting TSO:
296 * - set the RTE_MBUF_F_TX_TCP_SEG flag in mbuf->ol_flags (this flag implies
297 * RTE_MBUF_F_TX_TCP_CKSUM)
298 * - set the flag RTE_MBUF_F_TX_IPV4 or RTE_MBUF_F_TX_IPV6
299 * - if it's IPv4, set the RTE_MBUF_F_TX_IP_CKSUM flag
300 * - fill the mbuf offload information: l2_len, l3_len, l4_len, tso_segsz
302 #define RTE_MBUF_F_TX_TCP_SEG (1ULL << 50)
304 /** TX IEEE1588 packet to timestamp. */
305 #define RTE_MBUF_F_TX_IEEE1588_TMST (1ULL << 51)
308 * Bits 52+53 used for L4 packet type with checksum enabled: 00: Reserved,
309 * 01: TCP checksum, 10: SCTP checksum, 11: UDP checksum. To use hardware
310 * L4 checksum offload, the user needs to:
311 * - fill l2_len and l3_len in mbuf
312 * - set the flags RTE_MBUF_F_TX_TCP_CKSUM, RTE_MBUF_F_TX_SCTP_CKSUM or RTE_MBUF_F_TX_UDP_CKSUM
313 * - set the flag RTE_MBUF_F_TX_IPV4 or RTE_MBUF_F_TX_IPV6
315 #define RTE_MBUF_F_TX_L4_NO_CKSUM (0ULL << 52) /**< Disable L4 cksum of TX pkt. */
317 /** TCP cksum of TX pkt. computed by NIC. */
318 #define RTE_MBUF_F_TX_TCP_CKSUM (1ULL << 52)
320 /** SCTP cksum of TX pkt. computed by NIC. */
321 #define RTE_MBUF_F_TX_SCTP_CKSUM (2ULL << 52)
323 /** UDP cksum of TX pkt. computed by NIC. */
324 #define RTE_MBUF_F_TX_UDP_CKSUM (3ULL << 52)
326 /** Mask for L4 cksum offload request. */
327 #define RTE_MBUF_F_TX_L4_MASK (3ULL << 52)
330 * Offload the IP checksum in the hardware. The flag RTE_MBUF_F_TX_IPV4 should
331 * also be set by the application, although a PMD will only check
332 * RTE_MBUF_F_TX_IP_CKSUM.
333 * - fill the mbuf offload information: l2_len, l3_len
335 #define RTE_MBUF_F_TX_IP_CKSUM (1ULL << 54)
338 * Packet is IPv4. This flag must be set when using any offload feature
339 * (TSO, L3 or L4 checksum) to tell the NIC that the packet is an IPv4
340 * packet. If the packet is a tunneled packet, this flag is related to
343 #define RTE_MBUF_F_TX_IPV4 (1ULL << 55)
346 * Packet is IPv6. This flag must be set when using an offload feature
347 * (TSO or L4 checksum) to tell the NIC that the packet is an IPv6
348 * packet. If the packet is a tunneled packet, this flag is related to
351 #define RTE_MBUF_F_TX_IPV6 (1ULL << 56)
354 * VLAN tag insertion request to driver, driver may offload the insertion
355 * based on the device capability.
356 * mbuf 'vlan_tci' field must be valid when this flag is set.
358 #define RTE_MBUF_F_TX_VLAN (1ULL << 57)
359 /* this old name is deprecated */
360 #define RTE_MBUF_F_TX_VLAN_PKT RTE_MBUF_F_TX_VLAN
363 * Offload the IP checksum of an external header in the hardware. The
364 * flag RTE_MBUF_F_TX_OUTER_IPV4 should also be set by the application, although
365 * a PMD will only check RTE_MBUF_F_TX_OUTER_IP_CKSUM.
366 * - fill the mbuf offload information: outer_l2_len, outer_l3_len
368 #define RTE_MBUF_F_TX_OUTER_IP_CKSUM (1ULL << 58)
371 * Packet outer header is IPv4. This flag must be set when using any
372 * outer offload feature (L3 or L4 checksum) to tell the NIC that the
373 * outer header of the tunneled packet is an IPv4 packet.
375 #define RTE_MBUF_F_TX_OUTER_IPV4 (1ULL << 59)
378 * Packet outer header is IPv6. This flag must be set when using any
379 * outer offload feature (L4 checksum) to tell the NIC that the outer
380 * header of the tunneled packet is an IPv6 packet.
382 #define RTE_MBUF_F_TX_OUTER_IPV6 (1ULL << 60)
385 * Bitmask of all supported packet Tx offload features flags,
386 * which can be set for packet.
388 #define RTE_MBUF_F_TX_OFFLOAD_MASK (RTE_MBUF_F_TX_OUTER_IPV6 | \
389 RTE_MBUF_F_TX_OUTER_IPV4 | \
390 RTE_MBUF_F_TX_OUTER_IP_CKSUM | \
391 RTE_MBUF_F_TX_VLAN_PKT | \
392 RTE_MBUF_F_TX_IPV6 | \
393 RTE_MBUF_F_TX_IPV4 | \
394 RTE_MBUF_F_TX_IP_CKSUM | \
395 RTE_MBUF_F_TX_L4_MASK | \
396 RTE_MBUF_F_TX_IEEE1588_TMST | \
397 RTE_MBUF_F_TX_TCP_SEG | \
398 RTE_MBUF_F_TX_QINQ_PKT | \
399 RTE_MBUF_F_TX_TUNNEL_MASK | \
400 RTE_MBUF_F_TX_MACSEC | \
401 RTE_MBUF_F_TX_SEC_OFFLOAD | \
402 RTE_MBUF_F_TX_UDP_SEG | \
403 RTE_MBUF_F_TX_OUTER_UDP_CKSUM)
406 * Mbuf having an external buffer attached. shinfo in mbuf must be filled.
408 #define RTE_MBUF_F_EXTERNAL (1ULL << 61)
410 #define RTE_MBUF_F_INDIRECT (1ULL << 62) /**< Indirect attached mbuf */
412 /** Alignment constraint of mbuf private area. */
413 #define RTE_MBUF_PRIV_ALIGN 8
416 * Some NICs need at least 2KB buffer to RX standard Ethernet frame without
417 * splitting it into multiple segments.
418 * So, for mbufs that planned to be involved into RX/TX, the recommended
419 * minimal buffer length is 2KB + RTE_PKTMBUF_HEADROOM.
421 #define RTE_MBUF_DEFAULT_DATAROOM 2048
422 #define RTE_MBUF_DEFAULT_BUF_SIZE \
423 (RTE_MBUF_DEFAULT_DATAROOM + RTE_PKTMBUF_HEADROOM)
425 struct rte_mbuf_sched {
426 uint32_t queue_id; /**< Queue ID. */
427 uint8_t traffic_class;
428 /**< Traffic class ID. Traffic class 0
429 * is the highest priority traffic class.
432 /**< Color. @see enum rte_color.*/
433 uint16_t reserved; /**< Reserved. */
434 }; /**< Hierarchical scheduler */
437 * enum for the tx_offload bit-fields lengths and offsets.
438 * defines the layout of rte_mbuf tx_offload field.
441 RTE_MBUF_L2_LEN_BITS = 7,
442 RTE_MBUF_L3_LEN_BITS = 9,
443 RTE_MBUF_L4_LEN_BITS = 8,
444 RTE_MBUF_TSO_SEGSZ_BITS = 16,
445 RTE_MBUF_OUTL3_LEN_BITS = 9,
446 RTE_MBUF_OUTL2_LEN_BITS = 7,
447 RTE_MBUF_TXOFLD_UNUSED_BITS = sizeof(uint64_t) * CHAR_BIT -
448 RTE_MBUF_L2_LEN_BITS -
449 RTE_MBUF_L3_LEN_BITS -
450 RTE_MBUF_L4_LEN_BITS -
451 RTE_MBUF_TSO_SEGSZ_BITS -
452 RTE_MBUF_OUTL3_LEN_BITS -
453 RTE_MBUF_OUTL2_LEN_BITS,
454 #if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
455 RTE_MBUF_L2_LEN_OFS =
456 sizeof(uint64_t) * CHAR_BIT - RTE_MBUF_L2_LEN_BITS,
457 RTE_MBUF_L3_LEN_OFS = RTE_MBUF_L2_LEN_OFS - RTE_MBUF_L3_LEN_BITS,
458 RTE_MBUF_L4_LEN_OFS = RTE_MBUF_L3_LEN_OFS - RTE_MBUF_L4_LEN_BITS,
459 RTE_MBUF_TSO_SEGSZ_OFS = RTE_MBUF_L4_LEN_OFS - RTE_MBUF_TSO_SEGSZ_BITS,
460 RTE_MBUF_OUTL3_LEN_OFS =
461 RTE_MBUF_TSO_SEGSZ_OFS - RTE_MBUF_OUTL3_LEN_BITS,
462 RTE_MBUF_OUTL2_LEN_OFS =
463 RTE_MBUF_OUTL3_LEN_OFS - RTE_MBUF_OUTL2_LEN_BITS,
464 RTE_MBUF_TXOFLD_UNUSED_OFS =
465 RTE_MBUF_OUTL2_LEN_OFS - RTE_MBUF_TXOFLD_UNUSED_BITS,
467 RTE_MBUF_L2_LEN_OFS = 0,
468 RTE_MBUF_L3_LEN_OFS = RTE_MBUF_L2_LEN_OFS + RTE_MBUF_L2_LEN_BITS,
469 RTE_MBUF_L4_LEN_OFS = RTE_MBUF_L3_LEN_OFS + RTE_MBUF_L3_LEN_BITS,
470 RTE_MBUF_TSO_SEGSZ_OFS = RTE_MBUF_L4_LEN_OFS + RTE_MBUF_L4_LEN_BITS,
471 RTE_MBUF_OUTL3_LEN_OFS =
472 RTE_MBUF_TSO_SEGSZ_OFS + RTE_MBUF_TSO_SEGSZ_BITS,
473 RTE_MBUF_OUTL2_LEN_OFS =
474 RTE_MBUF_OUTL3_LEN_OFS + RTE_MBUF_OUTL3_LEN_BITS,
475 RTE_MBUF_TXOFLD_UNUSED_OFS =
476 RTE_MBUF_OUTL2_LEN_OFS + RTE_MBUF_OUTL2_LEN_BITS,
481 * The generic rte_mbuf, containing a packet mbuf.
484 RTE_MARKER cacheline0;
486 void *buf_addr; /**< Virtual address of segment buffer. */
488 * Physical address of segment buffer.
489 * Force alignment to 8-bytes, so as to ensure we have the exact
490 * same mbuf cacheline0 layout for 32-bit and 64-bit. This makes
491 * working on vector drivers easier.
493 rte_iova_t buf_iova __rte_aligned(sizeof(rte_iova_t));
495 /* next 8 bytes are initialised on RX descriptor rearm */
496 RTE_MARKER64 rearm_data;
500 * Reference counter. Its size should at least equal to the size
501 * of port field (16 bits), to support zero-copy broadcast.
502 * It should only be accessed using the following functions:
503 * rte_mbuf_refcnt_update(), rte_mbuf_refcnt_read(), and
504 * rte_mbuf_refcnt_set(). The functionality of these functions (atomic,
505 * or non-atomic) is controlled by the RTE_MBUF_REFCNT_ATOMIC flag.
508 uint16_t nb_segs; /**< Number of segments. */
510 /** Input port (16 bits to support more than 256 virtual ports).
511 * The event eth Tx adapter uses this field to specify the output port.
515 uint64_t ol_flags; /**< Offload features. */
517 /* remaining bytes are set on RX when pulling packet from descriptor */
518 RTE_MARKER rx_descriptor_fields1;
521 * The packet type, which is the combination of outer/inner L2, L3, L4
522 * and tunnel types. The packet_type is about data really present in the
523 * mbuf. Example: if vlan stripping is enabled, a received vlan packet
524 * would have RTE_PTYPE_L2_ETHER and not RTE_PTYPE_L2_VLAN because the
525 * vlan is stripped from the data.
529 uint32_t packet_type; /**< L2/L3/L4 and tunnel information. */
532 uint8_t l2_type:4; /**< (Outer) L2 type. */
533 uint8_t l3_type:4; /**< (Outer) L3 type. */
534 uint8_t l4_type:4; /**< (Outer) L4 type. */
535 uint8_t tun_type:4; /**< Tunnel type. */
538 uint8_t inner_esp_next_proto;
539 /**< ESP next protocol type, valid if
540 * RTE_PTYPE_TUNNEL_ESP tunnel type is set
545 uint8_t inner_l2_type:4;
546 /**< Inner L2 type. */
547 uint8_t inner_l3_type:4;
548 /**< Inner L3 type. */
551 uint8_t inner_l4_type:4; /**< Inner L4 type. */
555 uint32_t pkt_len; /**< Total pkt len: sum of all segments. */
556 uint16_t data_len; /**< Amount of data in segment buffer. */
557 /** VLAN TCI (CPU order), valid if RTE_MBUF_F_RX_VLAN is set. */
563 uint32_t rss; /**< RSS hash result if RSS enabled */
571 /**< Second 4 flexible bytes */
574 /**< First 4 flexible bytes or FD ID, dependent
575 * on RTE_MBUF_F_RX_FDIR_* flag in ol_flags.
577 } fdir; /**< Filter identifier if FDIR enabled */
578 struct rte_mbuf_sched sched;
579 /**< Hierarchical scheduler : 8 bytes */
584 /**< The event eth Tx adapter uses this field
585 * to store Tx queue id.
586 * @see rte_event_eth_tx_adapter_txq_set()
588 } txadapter; /**< Eventdev ethdev Tx adapter */
589 /**< User defined tags. See rte_distributor_process() */
591 } hash; /**< hash information */
594 /** Outer VLAN TCI (CPU order), valid if RTE_MBUF_F_RX_QINQ is set. */
595 uint16_t vlan_tci_outer;
597 uint16_t buf_len; /**< Length of segment buffer. */
599 struct rte_mempool *pool; /**< Pool from which mbuf was allocated. */
601 /* second cache line - fields only used in slow path or on TX */
602 RTE_MARKER cacheline1 __rte_cache_min_aligned;
604 struct rte_mbuf *next; /**< Next segment of scattered packet. */
606 /* fields to support TX offloads */
609 uint64_t tx_offload; /**< combined for easy fetch */
612 uint64_t l2_len:RTE_MBUF_L2_LEN_BITS;
613 /**< L2 (MAC) Header Length for non-tunneling pkt.
614 * Outer_L4_len + ... + Inner_L2_len for tunneling pkt.
616 uint64_t l3_len:RTE_MBUF_L3_LEN_BITS;
617 /**< L3 (IP) Header Length. */
618 uint64_t l4_len:RTE_MBUF_L4_LEN_BITS;
619 /**< L4 (TCP/UDP) Header Length. */
620 uint64_t tso_segsz:RTE_MBUF_TSO_SEGSZ_BITS;
621 /**< TCP TSO segment size */
624 * Fields for Tx offloading of tunnels.
625 * These are undefined for packets which don't request
626 * any tunnel offloads (outer IP or UDP checksum,
629 * PMDs should not use these fields unconditionally
630 * when calculating offsets.
632 * Applications are expected to set appropriate tunnel
633 * offload flags when they fill in these fields.
635 uint64_t outer_l3_len:RTE_MBUF_OUTL3_LEN_BITS;
636 /**< Outer L3 (IP) Hdr Length. */
637 uint64_t outer_l2_len:RTE_MBUF_OUTL2_LEN_BITS;
638 /**< Outer L2 (MAC) Hdr Length. */
640 /* uint64_t unused:RTE_MBUF_TXOFLD_UNUSED_BITS; */
644 /** Shared data for external buffer attached to mbuf. See
645 * rte_pktmbuf_attach_extbuf().
647 struct rte_mbuf_ext_shared_info *shinfo;
649 /** Size of the application private data. In case of an indirect
650 * mbuf, it stores the direct mbuf private data size.
654 /** Timesync flags for use with IEEE1588. */
657 uint32_t dynfield1[9]; /**< Reserved for dynamic fields. */
658 } __rte_cache_aligned;
661 * Function typedef of callback to free externally attached buffer.
663 typedef void (*rte_mbuf_extbuf_free_callback_t)(void *addr, void *opaque);
666 * Shared data at the end of an external buffer.
668 struct rte_mbuf_ext_shared_info {
669 rte_mbuf_extbuf_free_callback_t free_cb; /**< Free callback function */
670 void *fcb_opaque; /**< Free callback argument */
674 /** Maximum number of nb_segs allowed. */
675 #define RTE_MBUF_MAX_NB_SEGS UINT16_MAX
678 * Returns TRUE if given mbuf is cloned by mbuf indirection, or FALSE
681 * If a mbuf has its data in another mbuf and references it by mbuf
682 * indirection, this mbuf can be defined as a cloned mbuf.
684 #define RTE_MBUF_CLONED(mb) ((mb)->ol_flags & RTE_MBUF_F_INDIRECT)
687 * Returns TRUE if given mbuf has an external buffer, or FALSE otherwise.
689 * External buffer is a user-provided anonymous buffer.
691 #define RTE_MBUF_HAS_EXTBUF(mb) ((mb)->ol_flags & RTE_MBUF_F_EXTERNAL)
694 * Returns TRUE if given mbuf is direct, or FALSE otherwise.
696 * If a mbuf embeds its own data after the rte_mbuf structure, this mbuf
697 * can be defined as a direct mbuf.
699 #define RTE_MBUF_DIRECT(mb) \
700 (!((mb)->ol_flags & (RTE_MBUF_F_INDIRECT | RTE_MBUF_F_EXTERNAL)))
702 /** Uninitialized or unspecified port. */
703 #define RTE_MBUF_PORT_INVALID UINT16_MAX
704 /** For backwards compatibility. */
705 #define MBUF_INVALID_PORT RTE_MBUF_PORT_INVALID
708 * A macro that points to an offset into the data in the mbuf.
710 * The returned pointer is cast to type t. Before using this
711 * function, the user must ensure that the first segment is large
712 * enough to accommodate its data.
717 * The offset into the mbuf data.
719 * The type to cast the result into.
721 #define rte_pktmbuf_mtod_offset(m, t, o) \
722 ((t)((char *)(m)->buf_addr + (m)->data_off + (o)))
725 * A macro that points to the start of the data in the mbuf.
727 * The returned pointer is cast to type t. Before using this
728 * function, the user must ensure that the first segment is large
729 * enough to accommodate its data.
734 * The type to cast the result into.
736 #define rte_pktmbuf_mtod(m, t) rte_pktmbuf_mtod_offset(m, t, 0)
739 * A macro that returns the IO address that points to an offset of the
740 * start of the data in the mbuf
745 * The offset into the data to calculate address from.
747 #define rte_pktmbuf_iova_offset(m, o) \
748 (rte_iova_t)((m)->buf_iova + (m)->data_off + (o))
751 * A macro that returns the IO address that points to the start of the
757 #define rte_pktmbuf_iova(m) rte_pktmbuf_iova_offset(m, 0)
763 #endif /* _RTE_MBUF_CORE_H_ */