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From: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
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Date: Thu, 8 Oct 2015 19:16:09 +0530
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Cc: Felix Marti <felix@chelsio.com>, Kumar Sanghvi <kumaras@chelsio.com>,
Nirranjan Kirubaharan <nirranjan@chelsio.com>
Subject: [dpdk-dev] [PATCH v2 5/6] cxgbe: Allow apps to change mtu
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Add a mtu_set() eth_dev_ops to allow DPDK apps to modify device mtu.
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>
---
v2:
- No change
drivers/net/cxgbe/cxgbe_ethdev.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/net/cxgbe/cxgbe_ethdev.c b/drivers/net/cxgbe/cxgbe_ethdev.c
index 6d7b29c..a8e057b 100644
--- a/drivers/net/cxgbe/cxgbe_ethdev.c
+++ b/drivers/net/cxgbe/cxgbe_ethdev.c
@@ -225,6 +225,34 @@ static int cxgbe_dev_link_update(struct rte_eth_dev *eth_dev,
return 0;
}
+static int cxgbe_dev_mtu_set(struct rte_eth_dev *eth_dev, uint16_t mtu)
+{
+ struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private);
+ struct adapter *adapter = pi->adapter;
+ struct rte_eth_dev_info dev_info;
+ int err;
+ uint16_t new_mtu = mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
+
+ cxgbe_dev_info_get(eth_dev, &dev_info);
+
+ /* Must accommodate at least ETHER_MIN_MTU */
+ if ((new_mtu < ETHER_MIN_MTU) || (new_mtu > dev_info.max_rx_pktlen))
+ return -EINVAL;
+
+ /* set to jumbo mode if needed */
+ if (new_mtu > ETHER_MAX_LEN)
+ eth_dev->data->dev_conf.rxmode.jumbo_frame = 1;
+ else
+ eth_dev->data->dev_conf.rxmode.jumbo_frame = 0;
+
+ err = t4_set_rxmode(adapter, adapter->mbox, pi->viid, new_mtu, -1, -1,
+ -1, -1, true);
+ if (!err)
+ eth_dev->data->dev_conf.rxmode.max_rx_pkt_len = new_mtu;
+
+ return err;
+}
+
static int cxgbe_dev_tx_queue_start(struct rte_eth_dev *eth_dev,
uint16_t tx_queue_id);
static int cxgbe_dev_rx_queue_start(struct rte_eth_dev *eth_dev,
@@ -724,6 +752,7 @@ static struct eth_dev_ops cxgbe_eth_dev_ops = {
.dev_configure = cxgbe_dev_configure,
.dev_infos_get = cxgbe_dev_info_get,
.link_update = cxgbe_dev_link_update,
+ .mtu_set = cxgbe_dev_mtu_set,
.tx_queue_setup = cxgbe_dev_tx_queue_setup,
.tx_queue_start = cxgbe_dev_tx_queue_start,
.tx_queue_stop = cxgbe_dev_tx_queue_stop,
--
2.5.3