+/*
+ * Traffic classes eligible for hash computation.
+ *
+ * Select packet headers used in computing the receive hash.
+ * This uses the same encoding as the RSS_MODES field of
+ * MC_CMD_RSS_CONTEXT_SET_FLAGS.
+ */
+#define EFX_RX_CLASS_IPV4_TCP_LBN 8
+#define EFX_RX_CLASS_IPV4_TCP_WIDTH 4
+#define EFX_RX_CLASS_IPV4_UDP_LBN 12
+#define EFX_RX_CLASS_IPV4_UDP_WIDTH 4
+#define EFX_RX_CLASS_IPV4_LBN 16
+#define EFX_RX_CLASS_IPV4_WIDTH 4
+#define EFX_RX_CLASS_IPV6_TCP_LBN 20
+#define EFX_RX_CLASS_IPV6_TCP_WIDTH 4
+#define EFX_RX_CLASS_IPV6_UDP_LBN 24
+#define EFX_RX_CLASS_IPV6_UDP_WIDTH 4
+#define EFX_RX_CLASS_IPV6_LBN 28
+#define EFX_RX_CLASS_IPV6_WIDTH 4
+
+#define EFX_RX_NCLASSES 6
+
+/*
+ * Ancillary flags used to construct generic hash tuples.
+ * This uses the same encoding as RSS_MODE_HASH_SELECTOR.
+ */
+#define EFX_RX_CLASS_HASH_SRC_ADDR (1U << 0)
+#define EFX_RX_CLASS_HASH_DST_ADDR (1U << 1)
+#define EFX_RX_CLASS_HASH_SRC_PORT (1U << 2)
+#define EFX_RX_CLASS_HASH_DST_PORT (1U << 3)
+
+/*
+ * Generic hash tuples.
+ *
+ * They express combinations of packet fields
+ * which can contribute to the hash value for
+ * a particular traffic class.
+ */
+#define EFX_RX_CLASS_HASH_DISABLE 0
+
+#define EFX_RX_CLASS_HASH_1TUPLE_SRC EFX_RX_CLASS_HASH_SRC_ADDR
+#define EFX_RX_CLASS_HASH_1TUPLE_DST EFX_RX_CLASS_HASH_DST_ADDR
+
+#define EFX_RX_CLASS_HASH_2TUPLE \
+ (EFX_RX_CLASS_HASH_SRC_ADDR | \
+ EFX_RX_CLASS_HASH_DST_ADDR)
+
+#define EFX_RX_CLASS_HASH_2TUPLE_SRC \
+ (EFX_RX_CLASS_HASH_SRC_ADDR | \
+ EFX_RX_CLASS_HASH_SRC_PORT)
+
+#define EFX_RX_CLASS_HASH_2TUPLE_DST \
+ (EFX_RX_CLASS_HASH_DST_ADDR | \
+ EFX_RX_CLASS_HASH_DST_PORT)
+
+#define EFX_RX_CLASS_HASH_4TUPLE \
+ (EFX_RX_CLASS_HASH_SRC_ADDR | \
+ EFX_RX_CLASS_HASH_DST_ADDR | \
+ EFX_RX_CLASS_HASH_SRC_PORT | \
+ EFX_RX_CLASS_HASH_DST_PORT)
+
+#define EFX_RX_CLASS_HASH_NTUPLES 7
+
+/*
+ * Hash flag constructor.
+ *
+ * Resulting flags encode hash tuples for specific traffic classes.
+ * The client drivers are encouraged to use these flags to form
+ * a hash type value.
+ */
+#define EFX_RX_HASH(_class, _tuple) \
+ EFX_INSERT_FIELD_NATIVE32(0, 31, \
+ EFX_RX_CLASS_##_class, EFX_RX_CLASS_HASH_##_tuple)
+
+/*
+ * The maximum number of EFX_RX_HASH() flags.
+ */
+#define EFX_RX_HASH_NFLAGS (EFX_RX_NCLASSES * EFX_RX_CLASS_HASH_NTUPLES)
+
+extern __checkReturn efx_rc_t
+efx_rx_scale_hash_flags_get(
+ __in efx_nic_t *enp,
+ __in efx_rx_hash_alg_t hash_alg,
+ __out_ecount_part(max_nflags, *nflagsp) unsigned int *flagsp,
+ __in unsigned int max_nflags,
+ __out unsigned int *nflagsp);
+