fbnic_ts40_to_ns(9)

💅 fbnic_ts40_to_ns(9) — from the Kernel API Manual, bestie

okay so picture this: you're deep in the kernel, you're in the fbnic driver, and somebody hands you a truncated 40-bit timestamp straight out of a descriptor. girlypop, what do you even do with that?? you call this function. that's the whole vibe. ✨

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🌸 NAME 🌸

fbnic_ts40_to_ns — literally converts a descriptor timestamp into PHC time, no cap 🕐💖

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🦋 SYNOPSIS 🦋

u64 fbnic_ts40_to_ns(struct fbnic_net *fbn, u64 ts40);

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🎀 ARGUMENTS 🎀

• fbn — the netdev priv of the FB NIC 💅 that's your main character struct, she's got the context
• ts40 — the timestamp read from a descriptor 👀 the raw 40-bit girly in question

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🔥 RETURN 🔥

A u64 value of PHC time, in nanoseconds ⏱️✨ that's the glow-up, that's the whole point

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👑 DESCRIPTION 👑

So here's the tea, bestie: this function takes that truncated 40-bit device timestamp you just read out of a descriptor and converts it into the full PHC time in nanoseconds. 🧚

like — the descriptor only gives you part of the picture, and this little icon turns it into the complete real-time clock situation. it's giving translator. it's giving full picture energy. periodt. 🫶

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/net/ethernet/meta/fbnic/fbnic_txrx.c 📂 — go read it, iykyk

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💀 reminder for my fellow gremlins: this is kernel API territory, so keep those types exactly as they are — struct fbnic_net * and u64 in, u64 out. don't get cute with it. 🍓

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and that's the page, bestie!! 🎀 source/version vibes: ./drivers/net/ethernet/meta/fbnic, dated October 2026 — mwah, slay, stan the FB NIC driver forever 💜⭐