net/enetc: use bulk alloc in Rx refill ring

Since we know in advance that we're going to fill in multiple
descriptors it's convenient to allocate the buffers in batches.

Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Acked-by: Gagandeep Singh <g.singh@nxp.com>

diff --git a/drivers/net/enetc/enetc_rxtx.c b/drivers/net/enetc/enetc_rxtx.c
index 262ed8a..8b85c53 100644 (file)
--- a/drivers/net/enetc/enetc_rxtx.c
+++ b/drivers/net/enetc/enetc_rxtx.c
@@ -14,6 +14,8 @@
 #include "enetc.h"
 #include "enetc_logs.h"
 
+#define ENETC_RXBD_BUNDLE 16 /* Number of buffers to allocate at once */
+
 static int
 enetc_clean_tx_ring(struct enetc_bdr *tx_ring)
 {
@@ -107,15 +109,25 @@ enetc_refill_rx_ring(struct enetc_bdr *rx_ring, const int buff_cnt)
 {
        struct enetc_swbd *rx_swbd;
        union enetc_rx_bd *rxbd;
-       int i, j;
+       int i, j, k = ENETC_RXBD_BUNDLE;
+       struct rte_mbuf *m[ENETC_RXBD_BUNDLE];
+       struct rte_mempool *mb_pool;
 
        i = rx_ring->next_to_use;
+       mb_pool = rx_ring->mb_pool;
        rx_swbd = &rx_ring->q_swbd[i];
        rxbd = ENETC_RXBD(*rx_ring, i);
        for (j = 0; j < buff_cnt; j++) {
-               rx_swbd->buffer_addr = (void *)(uintptr_t)
-                       rte_cpu_to_le_64((uint64_t)(uintptr_t)
-                                       rte_pktmbuf_alloc(rx_ring->mb_pool));
+               /* bulk alloc for the next up to 8 BDs */
+               if (k == ENETC_RXBD_BUNDLE) {
+                       k = 0;
+                       int m_cnt = RTE_MIN(buff_cnt - j, ENETC_RXBD_BUNDLE);
+
+                       if (rte_pktmbuf_alloc_bulk(mb_pool, m, m_cnt))
+                               return -1;
+               }
+
+               rx_swbd->buffer_addr = m[k];
                rxbd->w.addr = (uint64_t)(uintptr_t)
                               rx_swbd->buffer_addr->buf_iova +
                               rx_swbd->buffer_addr->data_off;
@@ -124,6 +136,7 @@ enetc_refill_rx_ring(struct enetc_bdr *rx_ring, const int buff_cnt)
                rx_swbd++;
                rxbd++;
                i++;
+               k++;
                if (unlikely(i == rx_ring->bd_count)) {
                        i = 0;
                        rxbd = ENETC_RXBD(*rx_ring, 0);