I40E_INVALIDATE_PF_HMC_PD(9)

💅 I40E_INVALIDATE_PF_HMC_PD 💅

ok so this is a page straight out of the Kernel API Manual, section 9, and it's all about I40E_INVALIDATE_PF_HMC_PD — yes bestie, that's the whole name, we don't abbreviate around here 💀

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✨ NAME ✨

I40E_INVALIDATE_PF_HMC_PD — invalidates the pd cache in the hardware 🫶

like, it goes in and tells the hardware "girl, that pd cache is stale, throw it out" — no cap, that's genuinely it 🌸

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🦋 SYNOPSIS 🦋

I40E_INVALIDATE_PF_HMC_PD (hw , sd_idx , pd_idx );

she takes three arguments, in that exact order, and the spacing is giving exactly-what-the-original-said so don't come for me 🙈

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🎀 ARGUMENTS 🎀

• hw — pointer to our hw struct ✨ like, the actual hardware handle you're working with, our main character struct, iykyk
• sd_idx — segment descriptor index 🧚 your lil' number pointing at which segment descriptor we mean
• pd_idx — page descriptor index 💖 same vibe, but for the page descriptor this time

ngl these two indexes are basically the coordinates of the thing you're invalidating, so double-check them before you yeet anything 🔥

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/net/ethernet/intel/i40e/i40e_hmc.h — the header where all the HMC goodness lives 📁
• I40E_SET_PF_SD_ENTRY(9)
• I40E_CLEAR_PF_SD_ENTRY(9)
• I40E_FIND_SD_INDEX_LIMIT(9)
• I40E_FIND_PD_INDEX_LIMIT(9)

like, go read the whole friend group bestie, they all hang out together 💅

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that's the page!! sourced from ./drivers/net/ethernet/intel/i40e, dated October 2026, and known to its friends as I40E_INVALIDATE_PF_HMC_PD(9) — bye bestie, go invalidate responsibly 👑💜