Function nfp_stats_id_alloc

dpdk/drivers/net/nfp/nfp_flow.c:484–518

}

static int
nfp_stats_id_alloc(struct nfp_flow_priv *priv, uint32_t *ctx)
{
	struct circ_buf *ring;
	uint32_t temp_stats_id;
	uint32_t freed_stats_id;

	/* Check for unallocated entries first. */
	if (priv->stats_ids.init_unallocated > 0) {
		*ctx = ((priv->stats_ids.init_unallocated - 1) & NFP_FL_STAT_ID_STAT) |
				(priv->active_mem_unit & NFP_FL_STAT_ID_MU_NUM);
		if (++priv->active_mem_unit == priv->total_mem_units) {
			priv->stats_ids.init_unallocated--;
			priv->active_mem_unit = 0;
		}

		return 0;
	}

	/* Check if buffer is empty */
	ring = &priv->stats_ids.free_list;
	freed_stats_id = priv->stats_ring_size;
	if (ring->head == ring->tail) {
		*ctx = freed_stats_id;
		return -ENOENT;
	}

	memcpy(&temp_stats_id, &ring->buf[ring->tail], NFP_FL_STATS_ELEM_RS);
	*ctx = temp_stats_id;
	memcpy(&ring->buf[ring->tail], &freed_stats_id, NFP_FL_STATS_ELEM_RS);
	ring->tail = (ring->tail + NFP_FL_STATS_ELEM_RS) %
			(priv->stats_ring_size * NFP_FL_STATS_ELEM_RS);

	return 0;
}

static int
nfp_stats_id_free(struct nfp_flow_priv *priv, uint32_t ctx)