Function sfc_rx_hash_init

dpdk/drivers/net/sfc/sfc_rx.c:1394–1448

}

int
sfc_rx_hash_init(struct sfc_adapter *sa)
{
	struct sfc_rss *rss = &sfc_sa2shared(sa)->rss;
	const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
	uint32_t alg_mask = encp->enc_rx_scale_hash_alg_mask;
	efx_rx_hash_alg_t alg;
	unsigned int flags_supp[EFX_RX_HASH_NFLAGS];
	unsigned int nb_flags_supp;
	struct sfc_rss_hf_rte_to_efx *hf_map;
	struct sfc_rss_hf_rte_to_efx *entry;
	efx_rx_hash_type_t efx_hash_types;
	unsigned int i;
	int rc;

	if (alg_mask & (1U << EFX_RX_HASHALG_TOEPLITZ))
		alg = EFX_RX_HASHALG_TOEPLITZ;
	else if (alg_mask & (1U << EFX_RX_HASHALG_PACKED_STREAM))
		alg = EFX_RX_HASHALG_PACKED_STREAM;
	else
		return EINVAL;

	rc = efx_rx_scale_hash_flags_get(sa->nic, alg, flags_supp,
					 RTE_DIM(flags_supp), &nb_flags_supp);
	if (rc != 0)
		return rc;

	hf_map = rte_calloc_socket("sfc-rss-hf-map",
				   RTE_DIM(sfc_rss_hf_map),
				   sizeof(*hf_map), 0, sa->socket_id);
	if (hf_map == NULL)
		return ENOMEM;

	entry = hf_map;
	efx_hash_types = 0;
	for (i = 0; i < RTE_DIM(sfc_rss_hf_map); ++i) {
		efx_rx_hash_type_t ht;

		ht = sfc_rx_hash_types_mask_supp(sfc_rss_hf_map[i].efx,
						 flags_supp, nb_flags_supp);
		if (ht != 0) {
			entry->rte = sfc_rss_hf_map[i].rte;
			entry->efx = ht;
			efx_hash_types |= ht;
			++entry;
		}
	}

	rss->hash_alg = alg;
	rss->hf_map_nb_entries = (unsigned int)(entry - hf_map);
	rss->hf_map = hf_map;
	rss->hash_types = efx_hash_types;

	return 0;
}

void
sfc_rx_hash_fini(struct sfc_adapter *sa)