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From: Michal Krawczyk <mk@semihalf.com>
To: Marcin Wojtas <mw@semihalf.com>, Michal Krawczyk <mk@semihalf.com>,
Guy Tzalik <gtzalik@amazon.com>, Evgeny Schemeilin <evgenys@amazon.com>
Cc: dev@dpdk.org,
matua@amazon.com,
Rafal Kozik <rk@semihalf.com>
Date: Thu, 7 Jun 2018 11:43:11 +0200
Message-Id: <20180607094322.14312-16-mk@semihalf.com>
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References: <20180607094322.14312-1-mk@semihalf.com>
Subject: [dpdk-dev] [PATCH v3 16/27] net/ena: add info about max number of
Tx/Rx descriptors
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From: Rafal Kozik <rk@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@semihalf.com>
Acked-by: Michal Krawczyk <mk@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