[PATCH v7 04/12] net/ice: support for MTU configure in DCF mode

[Kevin Liu <kevinx.liu@intel.com>]

From: Jie Wang <jie1x.wang@intel.com>

add API "mtu_set" to dcf, and it can configure the port mtu through
cmdline.

Signed-off-by: Jie Wang <jie1x.wang@intel.com>
Signed-off-by: Kevin Liu <kevinx.liu@intel.com>
---
 doc/guides/nics/features/ice_dcf.ini   |  1 +
 doc/guides/rel_notes/release_22_07.rst |  1 +
 drivers/net/ice/ice_dcf_ethdev.c       | 14 ++++++++++++++
 drivers/net/ice/ice_dcf_ethdev.h       |  6 ++++++
 4 files changed, 22 insertions(+)

diff --git a/doc/guides/nics/features/ice_dcf.ini b/doc/guides/nics/features/ice_dcf.ini
index d9c1b25407..be34ab4692 100644
--- a/doc/guides/nics/features/ice_dcf.ini
+++ b/doc/guides/nics/features/ice_dcf.ini
@@ -17,6 +17,7 @@ Inner L3 checksum    = P
 Inner L4 checksum    = P
 RSS reta update      = Y
 RSS key update       = Y
+MTU update           = Y
 Basic stats          = Y
 Linux                = Y
 x86-32               = Y
diff --git a/doc/guides/rel_notes/release_22_07.rst b/doc/guides/rel_notes/release_22_07.rst
index 866af8c0b3..3c8412c82e 100644
--- a/doc/guides/rel_notes/release_22_07.rst
+++ b/doc/guides/rel_notes/release_22_07.rst
@@ -64,6 +64,7 @@ New Features
 
  * Added support for RSS RETA configure in DCF mode.
  * Added support for RSS HASH configure in DCF mode.
+ * Added support for MTU configure in DCF mode.
 
 Removed Items
 -------------
diff --git a/drivers/net/ice/ice_dcf_ethdev.c b/drivers/net/ice/ice_dcf_ethdev.c
index d8b5961514..06d752fd61 100644
--- a/drivers/net/ice/ice_dcf_ethdev.c
+++ b/drivers/net/ice/ice_dcf_ethdev.c
@@ -1081,6 +1081,19 @@ ice_dcf_link_update(struct rte_eth_dev *dev,
 	return rte_eth_linkstatus_set(dev, &new_link);
 }
 
+static int
+ice_dcf_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu __rte_unused)
+{
+	/* mtu setting is forbidden if port is start */
+	if (dev->data->dev_started != 0) {
+		PMD_DRV_LOG(ERR, "port %d must be stopped before configuration",
+			    dev->data->port_id);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
 bool
 ice_dcf_adminq_need_retry(struct ice_adapter *ad)
 {
@@ -1236,6 +1249,7 @@ static const struct eth_dev_ops ice_dcf_eth_dev_ops = {
 	.rss_hash_update         = ice_dcf_dev_rss_hash_update,
 	.rss_hash_conf_get       = ice_dcf_dev_rss_hash_conf_get,
 	.tx_done_cleanup         = ice_tx_done_cleanup,
+	.mtu_set                 = ice_dcf_dev_mtu_set,
 };
 
 static int
diff --git a/drivers/net/ice/ice_dcf_ethdev.h b/drivers/net/ice/ice_dcf_ethdev.h
index 11a1305038..f2faf26f58 100644
--- a/drivers/net/ice/ice_dcf_ethdev.h
+++ b/drivers/net/ice/ice_dcf_ethdev.h
@@ -15,6 +15,12 @@
 
 #define ICE_DCF_MAX_RINGS  1
 
+#define ICE_DCF_FRAME_SIZE_MAX       9728
+#define ICE_DCF_VLAN_TAG_SIZE               4
+#define ICE_DCF_ETH_OVERHEAD \
+	(RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN + ICE_DCF_VLAN_TAG_SIZE * 2)
+#define ICE_DCF_ETH_MAX_LEN (RTE_ETHER_MTU + ICE_DCF_ETH_OVERHEAD)
+
 struct ice_dcf_queue {
 	uint64_t dummy;
 };
-- 
2.33.1