There is necessary to do some check of max packet size boundary
for code safe when enable jumbo frame.
Signed-off-by: Wei Zhao <wei.zh...@intel.com>
---
drivers/net/ixgbe/ixgbe_rxtx.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 2f0262a..d304dee 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -4814,6 +4814,34 @@ void __attribute__((cold))
return 0;
}
+int __attribute__((cold))
+ixgbe_dev_jumboenable_check(struct rte_eth_dev *dev,
+ uint16_t max_rx_pkt_len)
+{
+ struct rte_eth_dev_info dev_info;
+
+ ixgbe_dev_info_get(dev, &dev_info);
+
+ /* check that max packet size is within the allowed range */
+ if (max_rx_pkt_len < ETHER_MIN_MTU) {
+ PMD_INIT_LOG(ERR, "max packet size is too small.");
+ return -EINVAL;
+ }
+
+ if (max_rx_pkt_len > dev_info.max_rx_pktlen) {
+ PMD_INIT_LOG(ERR, "max packet size is too big.");
+ return -EINVAL;
+ }
+
+ /* check jumbo mode if needed */
+ if (max_rx_pkt_len < ETHER_MAX_LEN) {
+ PMD_INIT_LOG(ERR, "No need to enable jumbo.");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
/*
* Initializes Receive Unit.
*/
@@ -4865,6 +4893,9 @@ int __attribute__((cold))
* Configure jumbo frame support, if any.
*/
if (rx_conf->offloads & DEV_RX_OFFLOAD_JUMBO_FRAME) {
+ if (ixgbe_dev_jumboenable_check(dev, rx_conf->max_rx_pkt_len))
+ return -EINVAL;
+
hlreg0 |= IXGBE_HLREG0_JUMBOEN;
maxfrs = IXGBE_READ_REG(hw, IXGBE_MAXFRS);
maxfrs &= 0x0000FFFF;
--
1.8.3.1
