nps_enet_start_xmit(9)

nps_enet_start_xmit 💅

okay so this page lives in the Kernel API Manual, and it’s all about one little function that gets the transmission party started. bestie, it’s giving “upper layers said go” energy. ✨

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🌸 NAME 🌸

nps_enet_start_xmit — Starts the data transmission. 🚀

🦋 SYNOPSIS 🦋

netdev_tx_t nps_enet_start_xmit (struct sk_buff *skb , struct net_device
       *ndev );

🎀 ARGUMENTS 🎀

• skb — a sk_buff pointer that contains the data to be Transmitted. literally the payload carrier, no cap. 📦
• ndev — pointer to the net_device structure. the network-device bestie in question. 🫶

💖 RETURN 💖

• NETDEV_TX_OK, on success ✨
• NETDEV_TX_BUSY, if any of the descriptors are not free 😭

so yeah, if any of the descriptors are not free, the vibe check comes back NETDEV_TX_BUSY. periodt. 💅

🌈 DESCRIPTION 🌈

This function is invoked from upper layers to initiate transmission. that’s the whole assignment: upper layers call it when it’s time to start sending. iconic behavior, honestly. 🔥

⭐ SEE ALSO ⭐

Kernel file ./drivers/net/ethernet/ezchip/nps_enet.c — and these related function besties, iykyk:

• nps_enet_poll(9)
• nps_enet_irq_handler(9)
• nps_enet_hw_reset(9)
• nps_enet_set_mac_address(9)
• nps_enet_set_rx_mode(9)
• nps_enet_open(9)
• nps_enet_stop(9)

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and that’s the page, bestie 🎀✨ source/version: ./drivers/net/ethernet/ezchip · date: October 2026 💜🦋