net/txgbe: add Tx queue maximum limit

[ upstream commit afcba8586daa5abc3868180e96601babfef3cfc1 ] Limit TX queue maximum to 64 when neither VT nor DCB are enabled, since hardware doesn't support it. Fixes: 75cbb1f ("net/txgbe: add device configuration") Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
bluca · Oct 18, 2023 · f3d6cc7 · f3d6cc7
1 parent fec23fd
commit f3d6cc7
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diff --git a/drivers/net/txgbe/txgbe_ethdev.c b/drivers/net/txgbe/txgbe_ethdev.c
@@ -1277,6 +1277,19 @@ txgbe_check_mq_mode(struct rte_eth_dev *dev)
 				return -EINVAL;
 			}
 		}
+
+		/*
+		 * When DCB/VT is off, maximum number of queues changes
+		 */
+		if (dev_conf->txmode.mq_mode == ETH_MQ_TX_NONE) {
+			if (nb_tx_q > TXGBE_NONE_MODE_TX_NB_QUEUES) {
+				PMD_INIT_LOG(ERR,
+					     "Neither VT nor DCB are enabled, "
+					     "nb_tx_q > %d.",
+					     TXGBE_NONE_MODE_TX_NB_QUEUES);
+				return -EINVAL;
+			}
+		}
 	}
 	return 0;
 }

diff --git a/drivers/net/txgbe/txgbe_ethdev.h b/drivers/net/txgbe/txgbe_ethdev.h
@@ -28,6 +28,7 @@
 /*Default value of Max Rx Queue*/
 #define TXGBE_MAX_RX_QUEUE_NUM	128
 #define TXGBE_VMDQ_DCB_NB_QUEUES     TXGBE_MAX_RX_QUEUE_NUM
+#define TXGBE_NONE_MODE_TX_NB_QUEUES 64
 
 #ifndef NBBY
 #define NBBY	8	/* number of bits in a byte */