[PATCH v2 08/21] net/cpfl: support MTU configuration

[Mingxia Liu]

Add dev ops mtu_set.

Signed-off-by: Mingxia Liu <mingxia....@intel.com>
---
 doc/guides/nics/features/cpfl.ini |  1 +
 drivers/net/cpfl/cpfl_ethdev.c    | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/doc/guides/nics/features/cpfl.ini 
b/doc/guides/nics/features/cpfl.ini
index a2d1ca9e15..470ba81579 100644
--- a/doc/guides/nics/features/cpfl.ini
+++ b/doc/guides/nics/features/cpfl.ini
@@ -7,6 +7,7 @@
 ; is selected.
 ;
 [Features]
+MTU update           = Y
 Linux                = Y
 x86-32               = Y
 x86-64               = Y
diff --git a/drivers/net/cpfl/cpfl_ethdev.c b/drivers/net/cpfl/cpfl_ethdev.c
index 922f1acc59..5ef9c902f7 100644
--- a/drivers/net/cpfl/cpfl_ethdev.c
+++ b/drivers/net/cpfl/cpfl_ethdev.c
@@ -121,6 +121,27 @@ cpfl_dev_info_get(struct rte_eth_dev *dev, struct 
rte_eth_dev_info *dev_info)
        return 0;
 }
 
+static int
+cpfl_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+       struct idpf_vport *vport = dev->data->dev_private;
+
+       /* mtu setting is forbidden if port is start */
+       if (dev->data->dev_started) {
+               PMD_DRV_LOG(ERR, "port must be stopped before configuration");
+               return -EBUSY;
+       }
+
+       if (mtu > vport->max_mtu) {
+               PMD_DRV_LOG(ERR, "MTU should be less than %d", vport->max_mtu);
+               return -EINVAL;
+       }
+
+       vport->max_pkt_len = mtu + CPFL_ETH_OVERHEAD;
+
+       return 0;
+}
+
 static const uint32_t *
 cpfl_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
 {
@@ -182,6 +203,10 @@ cpfl_dev_configure(struct rte_eth_dev *dev)
                return -ENOTSUP;
        }
 
+       vport->max_pkt_len =
+               (dev->data->mtu == 0) ? CPFL_DEFAULT_MTU : dev->data->mtu +
+               CPFL_ETH_OVERHEAD;
+
        return 0;
 }
 
@@ -626,6 +651,7 @@ static const struct eth_dev_ops cpfl_eth_dev_ops = {
        .tx_queue_stop                  = cpfl_tx_queue_stop,
        .rx_queue_release               = cpfl_dev_rx_queue_release,
        .tx_queue_release               = cpfl_dev_tx_queue_release,
+       .mtu_set                        = cpfl_dev_mtu_set,
        .dev_supported_ptypes_get       = cpfl_dev_supported_ptypes_get,
 };
 
-- 
2.25.1