- /* Workaround for hairpin startup */
- attr.wq_attr.log_hairpin_num_packets = log2above(32);
- /* Workaround for packets larger than 1KB */
- attr.wq_attr.log_hairpin_data_sz =
- priv->config.hca_attr.log_max_hairpin_wq_data_sz;
+ max_wq_data = priv->config.hca_attr.log_max_hairpin_wq_data_sz;
+ /* Jumbo frames > 9KB should be supported, and more packets. */
+ if (priv->config.log_hp_size != (uint32_t)MLX5_ARG_UNSET) {
+ if (priv->config.log_hp_size > max_wq_data) {
+ DRV_LOG(ERR, "total data size %u power of 2 is "
+ "too large for hairpin",
+ priv->config.log_hp_size);
+ rte_errno = ERANGE;
+ return NULL;
+ }
+ attr.wq_attr.log_hairpin_data_sz = priv->config.log_hp_size;
+ } else {
+ attr.wq_attr.log_hairpin_data_sz =
+ (max_wq_data < MLX5_HAIRPIN_JUMBO_LOG_SIZE) ?
+ max_wq_data : MLX5_HAIRPIN_JUMBO_LOG_SIZE;
+ }
+ /* Set the packets number to the maximum value for performance. */
+ attr.wq_attr.log_hairpin_num_packets =
+ attr.wq_attr.log_hairpin_data_sz -
+ MLX5_HAIRPIN_QUEUE_STRIDE;