From 65d9804edc050310d77fe28302a2ed1295124111 Mon Sep 17 00:00:00 2001
From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Date: Fri, 17 Jun 2016 18:59:43 +0530
Subject: [PATCH] net/thunderx: support MTU configuration
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Signed-off-by: Maciej Czekaj <maciej.czekaj@caviumnetworks.com>
Signed-off-by: Kamil Rytarowski <kamil.rytarowski@caviumnetworks.com>
Signed-off-by: Zyta Szpak <zyta.szpak@semihalf.com>
Signed-off-by: Slawomir Rosek <slawomir.rosek@semihalf.com>
Signed-off-by: Radoslaw Biernacki <rad@semihalf.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
drivers/net/thunderx/nicvf_ethdev.c | 44 +++++++++++++++++++++++++++++
drivers/net/thunderx/nicvf_ethdev.h | 2 ++
2 files changed, 46 insertions(+)
diff --git a/drivers/net/thunderx/nicvf_ethdev.c b/drivers/net/thunderx/nicvf_ethdev.c
index 08f65b3364..65b14c80cf 100644
--- a/drivers/net/thunderx/nicvf_ethdev.c
+++ b/drivers/net/thunderx/nicvf_ethdev.c
@@ -143,6 +143,49 @@ nicvf_dev_link_update(struct rte_eth_dev *dev,
return nicvf_atomic_write_link_status(dev, &link);
}
+static int
+nicvf_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
+{
+ struct nicvf *nic = nicvf_pmd_priv(dev);
+ uint32_t buffsz, frame_size = mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
+
+ PMD_INIT_FUNC_TRACE();
+
+ if (frame_size > NIC_HW_MAX_FRS)
+ return -EINVAL;
+
+ if (frame_size < NIC_HW_MIN_FRS)
+ return -EINVAL;
+
+ buffsz = dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM;
+
+ /*
+ * Refuse mtu that requires the support of scattered packets
+ * when this feature has not been enabled before.
+ */
+ if (!dev->data->scattered_rx &&
+ (frame_size + 2 * VLAN_TAG_SIZE > buffsz))
+ return -EINVAL;
+
+ /* check <seg size> * <max_seg> >= max_frame */
+ if (dev->data->scattered_rx &&
+ (frame_size + 2 * VLAN_TAG_SIZE > buffsz * NIC_HW_MAX_SEGS))
+ return -EINVAL;
+
+ if (frame_size > ETHER_MAX_LEN)
+ dev->data->dev_conf.rxmode.jumbo_frame = 1;
+ else
+ dev->data->dev_conf.rxmode.jumbo_frame = 0;
+
+ if (nicvf_mbox_update_hw_max_frs(nic, frame_size))
+ return -EINVAL;
+
+ /* Update max frame size */
+ dev->data->dev_conf.rxmode.max_rx_pkt_len = (uint32_t)frame_size;
+ nic->mtu = mtu;
+ return 0;
+}
+
static int
nicvf_dev_get_reg_length(struct rte_eth_dev *dev __rte_unused)
{
@@ -769,6 +812,7 @@ static const struct eth_dev_ops nicvf_eth_dev_ops = {
.dev_configure = nicvf_dev_configure,
.link_update = nicvf_dev_link_update,
.dev_infos_get = nicvf_dev_info_get,
+ .mtu_set = nicvf_dev_set_mtu,
.reta_update = nicvf_dev_reta_update,
.reta_query = nicvf_dev_reta_query,
.rss_hash_update = nicvf_dev_rss_hash_update,
diff --git a/drivers/net/thunderx/nicvf_ethdev.h b/drivers/net/thunderx/nicvf_ethdev.h
index afb875aac1..b1af468755 100644
--- a/drivers/net/thunderx/nicvf_ethdev.h
+++ b/drivers/net/thunderx/nicvf_ethdev.h
@@ -62,6 +62,8 @@
#define NICVF_MAX_RX_FREE_THRESH 1024
#define NICVF_MAX_TX_FREE_THRESH 1024
+#define VLAN_TAG_SIZE 4 /* 802.3ac tag */
+
static inline struct nicvf *
nicvf_pmd_priv(struct rte_eth_dev *eth_dev)
{
--
2.39.5