This commit sets the min and max supported MTU values for ixgbe devices
via the ixgbe_dev_info_get() function. Min MTU supported is set to
ETHER_MIN_MTU and max mtu is calculated as the max packet length
supported minus the transport overhead. To aid in these calculations
a new MACRO 'IXGBE_ETH_OVERHEAD' has been introduced to consolidate
overhead calculation and avoid duplication.
Signed-off-by: Ian Stokes <ian.sto...@intel.com>
---
drivers/net/ixgbe/ixgbe_ethdev.c | 4 +++-
drivers/net/ixgbe/ixgbe_ethdev.h | 3 +++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 749311048..c4f6ff5bd 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -3734,6 +3734,8 @@ ixgbe_dev_info_get(struct rte_eth_dev *dev, struct
rte_eth_dev_info *dev_info)
dev_info->max_vmdq_pools = ETH_16_POOLS;
else
dev_info->max_vmdq_pools = ETH_64_POOLS;
+ dev_info->max_mtu = dev_info->max_rx_pktlen - IXGBE_ETH_OVERHEAD;
+ dev_info->min_mtu = ETHER_MIN_MTU;
dev_info->vmdq_queue_num = dev_info->max_rx_queues;
dev_info->rx_queue_offload_capa = ixgbe_get_rx_queue_offloads(dev);
dev_info->rx_offload_capa = (ixgbe_get_rx_port_offloads(dev) |
@@ -4925,7 +4927,7 @@ ixgbe_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
uint32_t maxfrs;
struct ixgbe_hw *hw;
struct rte_eth_dev_info dev_info;
- uint32_t frame_size = mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
+ uint32_t frame_size = mtu + IXGBE_ETH_OVERHEAD;
struct rte_eth_dev_data *dev_data = dev->data;
ixgbe_dev_info_get(dev, &dev_info);
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.h b/drivers/net/ixgbe/ixgbe_ethdev.h
index 565c69c9e..2217be30c 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.h
+++ b/drivers/net/ixgbe/ixgbe_ethdev.h
@@ -100,6 +100,9 @@
#define IXGBE_5TUPLE_MAX_PRI 7
#define IXGBE_5TUPLE_MIN_PRI 1
+/* The overhead from MTU to max frame size. */
+#define IXGBE_ETH_OVERHEAD (ETHER_HDR_LEN + ETHER_CRC_LEN)
+
/* bit of VXLAN tunnel type | 7 bits of zeros | 8 bits of zeros*/
#define IXGBE_FDIR_VXLAN_TUNNEL_TYPE 0x8000
/* bit of NVGRE tunnel type | 7 bits of zeros | 8 bits of zeros*/
--
2.13.6
