i40e: add log messages when rx bulk mode is not usable

Signed-off-by: David Marchand <david.marchand@6wind.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

diff --git a/lib/librte_pmd_i40e/i40e_rxtx.c b/lib/librte_pmd_i40e/i40e_rxtx.c
index 2ef9b47..099699c 100644 (file)
--- a/lib/librte_pmd_i40e/i40e_rxtx.c
+++ b/lib/librte_pmd_i40e/i40e_rxtx.c
@@ -535,15 +535,34 @@ check_rx_burst_bulk_alloc_preconditions(__rte_unused struct i40e_rx_queue *rxq)
        int ret = 0;
 
 #ifdef RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC
-       if (!(rxq->rx_free_thresh >= RTE_PMD_I40E_RX_MAX_BURST))
+       if (!(rxq->rx_free_thresh >= RTE_PMD_I40E_RX_MAX_BURST)) {
+               PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions: "
+                            "rxq->rx_free_thresh=%d, "
+                            "RTE_PMD_I40E_RX_MAX_BURST=%d",
+                            rxq->rx_free_thresh, RTE_PMD_I40E_RX_MAX_BURST);
                ret = -EINVAL;
-       else if (!(rxq->rx_free_thresh < rxq->nb_rx_desc))
+       } else if (!(rxq->rx_free_thresh < rxq->nb_rx_desc)) {
+               PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions: "
+                            "rxq->rx_free_thresh=%d, "
+                            "rxq->nb_rx_desc=%d",
+                            rxq->rx_free_thresh, rxq->nb_rx_desc);
                ret = -EINVAL;
-       else if (!(rxq->nb_rx_desc % rxq->rx_free_thresh) == 0)
+       } else if (!(rxq->nb_rx_desc % rxq->rx_free_thresh) == 0) {
+               PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions: "
+                            "rxq->nb_rx_desc=%d, "
+                            "rxq->rx_free_thresh=%d",
+                            rxq->nb_rx_desc, rxq->rx_free_thresh);
                ret = -EINVAL;
-       else if (!(rxq->nb_rx_desc < (I40E_MAX_RING_DESC -
-                               RTE_PMD_I40E_RX_MAX_BURST)))
+       } else if (!(rxq->nb_rx_desc < (I40E_MAX_RING_DESC -
+                               RTE_PMD_I40E_RX_MAX_BURST))) {
+               PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions: "
+                            "rxq->nb_rx_desc=%d, "
+                            "I40E_MAX_RING_DESC=%d, "
+                            "RTE_PMD_I40E_RX_MAX_BURST=%d",
+                            rxq->nb_rx_desc, I40E_MAX_RING_DESC,
+                            RTE_PMD_I40E_RX_MAX_BURST);
                ret = -EINVAL;
+       }
 #else
        ret = -EINVAL;
 #endif