tn40_tx_push_desc_safe(9)

💅 tn40_tx_push_desc_safe — the kernel API manual, but make it make sense

okay bestie, so we're in the kernel API manual, section 9, and today's main character is tn40_tx_push_desc_safe. yes that's a whole mouthful, i know. it's a functon in the Tehuti tn40 driver and it's literally the "don't trip, check first" version of pushing a descriptor to the TxD fifo. 🎀

✨ NAME ✨

tn40_tx_push_desc_safe — push a descriptor to the TxD fifo, but like... safely. no cap. 🦋

✨ SYNOPSIS ✨

void tn40_tx_push_desc_safe (struct tn40_priv *priv , void *data , int size );

that's it. that's the whole vibe. void return, three args, go off. ✨

✨ ARGUMENTS ✨

• priv — the NIC's private structure. think of it as the driver's little purse where it keeps all its important stuff 👜
• data — the descriptor data itself. the payload. the moment. 💫
• size — how big the descriptor is, in all its glory. 📏

✨ DESCRIPTION ✨

so here's the tea ☕: this function checks for available space first, and if there isn't enough room, it waits for the NIC to read the existing data before it goes ahead and writes the new data. it's giving "look before you leap" energy and honestly? iconic. 👑

no guessing, no yeeting descriptors into a full fifo — it does the vibe check on space, waits if it has to, and then writes. that's the whole job and it does it well fr fr. 💅

✨ SEE ALSO ✨

• ./drivers/net/ethernet/tehuti/tn40.c — the kernel file where all this lives 🧚
• tn40_create_rx_ring(9)
• tn40_rx_alloc_buffers(9)
• tn40_tx_map_skb(9)
• tn40_tx_space(9) — the space-checking bestie, highly relevant here 👀
• tn40_tx_push_desc(9) — the non-"safe" sibling, iykyk 💀

and that's the whole page! 🫶 this gem comes to you from ./drivers/net/ethernet/tehuti, dated October 2026 — so mark your calendars, screenshot it, send it to the group chat. periodt. 🌸💖✨