ceph/src/seastar/dpdk/drivers/net/tap/tap_rss.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2017 Mellanox Technologies, Ltd
   3  */
   4
   5 #ifndef _TAP_RSS_H_
   6 #define _TAP_RSS_H_
   7
   8 #ifndef TAP_MAX_QUEUES
   9 #define TAP_MAX_QUEUES 16
  10 #endif
  11
  12 /* Fixed RSS hash key size in bytes. */
  13 #define TAP_RSS_HASH_KEY_SIZE 40
  14
  15 /* Supported RSS */
  16 #define TAP_RSS_HF_MASK (~(ETH_RSS_IP | ETH_RSS_UDP | ETH_RSS_TCP))
  17
  18 /* hashed fields for RSS */
  19 enum hash_field {
  20         HASH_FIELD_IPV4_L3,     /* IPv4 src/dst addr */
  21         HASH_FIELD_IPV4_L3_L4,  /* IPv4 src/dst addr + L4 src/dst ports */
  22         HASH_FIELD_IPV6_L3,     /* IPv6 src/dst addr */
  23         HASH_FIELD_IPV6_L3_L4,  /* IPv6 src/dst addr + L4 src/dst ports */
  24         HASH_FIELD_L2_SRC,      /* Ethernet src addr */
  25         HASH_FIELD_L2_DST,      /* Ethernet dst addr */
  26         HASH_FIELD_L3_SRC,      /* L3 src addr */
  27         HASH_FIELD_L3_DST,      /* L3 dst addr */
  28         HASH_FIELD_L4_SRC,      /* TCP/UDP src ports */
  29         HASH_FIELD_L4_DST,      /* TCP/UDP dst ports */
  30 };
  31
  32 struct rss_key {
  33          __u8 key[128];
  34         __u32 hash_fields;
  35         __u32 key_size;
  36         __u32 queues[TAP_MAX_QUEUES];
  37         __u32 nb_queues;
  38 } __attribute__((packed));
  39
  40 #endif /* _TAP_RSS_H_ */