[dpdk-dev] [PATCH v3 16/27] net/ena: add info about max number of Tx/Rx descriptors

[Michal Krawczyk]

From: Rafal Kozik <rk at semihalf.com>

In function ena_infos_get driver provides information about minimal
and maximal number of Rx and Tx descriptors.

Signed-off-by: Rafal Kozik <rk at semihalf.com>
Acked-by: Michal Krawczyk <mk at semihalf.com>
---
 drivers/net/ena/ena_ethdev.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index cdefcd325..a88de2eca 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -85,6 +85,9 @@
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
+#define ENA_MAX_RING_DESC	ENA_DEFAULT_RING_SIZE
+#define ENA_MIN_RING_DESC	128
+
 enum ethtool_stringset {
 	ETH_SS_TEST             = 0,
 	ETH_SS_STATS,
@@ -1740,6 +1743,16 @@ static void ena_infos_get(struct rte_eth_dev *dev,
 
 	adapter->tx_supported_offloads = tx_feat;
 	adapter->rx_supported_offloads = rx_feat;
+
+	dev_info->rx_desc_lim.nb_max = ENA_MAX_RING_DESC;
+	dev_info->rx_desc_lim.nb_min = ENA_MIN_RING_DESC;
+
+	dev_info->tx_desc_lim.nb_max = ENA_MAX_RING_DESC;
+	dev_info->tx_desc_lim.nb_min = ENA_MIN_RING_DESC;
+	dev_info->tx_desc_lim.nb_seg_max = RTE_MIN(ENA_PKT_MAX_BUFS,
+					feat.max_queues.max_packet_tx_descs);
+	dev_info->tx_desc_lim.nb_mtu_seg_max = RTE_MIN(ENA_PKT_MAX_BUFS,
+					feat.max_queues.max_packet_tx_descs);
 }
 
 static uint16_t eth_ena_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
-- 
2.14.1