i40e_write_word(9)

💅 i40e_write_word — like, the HMC context word replacer ✨

Okay bestie, welcome to the i40e_write_word page from the Kernel API Manual — yes, it's a real function, yes it's in the kernel, and yes we're gonna get through it together 🫶

---

✨ NAME ✨

i40e_write_word — replace HMC context word 🔥

That's it. That's the whole vibe. It swaps out a word in your HMC context. Iconic, honestly.

---

🌸 SYNOPSIS 🌸

void i40e_write_word (u8 *hmc_bits , struct i40e_context_ele *ce_info ,
u8 *src );

Notice it returns void? It's giving "I do the thing and I don't report back" energy 💀 No return value, no drama. It just does it.

---

🎀 ARGUMENTS 🎀

Three args, all of them lowkey essential, so let's go one by one:

• hmc_bits — this one's a u8 * pointing at the HMC memory 🧠 Like, the actual place the bits live. That's where the writing happens.
• ce_info — a struct i40e_context_ele *, and it's literally "a description of the struct to be read from". It's the little map that tells the function what it's looking at 🗺️
• src — also described as "the struct to be read from", and yep, it's a u8 *. This is the data source, the main character of the operation 👑

Ngl bestie, ce_info and src are both described in the original as "the struct to be read from" — that's exactly what the manpage says, so I'm not gonna pretend otherwise 🙈 Word for word, that's the description.

---

🦋 SEE ALSO 🦋

So many friends, so much HMC lore. Here's the whole group chat, no cap — starting with the kernel file it lives in:

• Kernel file ./drivers/net/ethernet/intel/i40e/i40e_lan_hmc.c
• i40e_align_l2obj_base(9)
• i40e_calculate_l2fpm_size(9)
• i40e_init_lan_hmc(9)
• i40e_remove_pd_page(9)
• i40e_remove_sd_bp(9)
• i40e_create_lan_hmc_object(9)
• i40e_configure_lan_hmc(9)
• i40e_delete_lan_hmc_object(9)
• i40e_shutdown_lan_hmc(9)
• i40e_write_byte(9)
• i40e_write_dword(9)
• i40e_write_qword(9)
• i40e_clear_hmc_context(9)
• i40e_set_hmc_context(9)
• i40e_hmc_get_object_va(9)
• i40e_clear_lan_tx_queue_context(9)
• i40e_set_lan_tx_queue_context(9)
• i40e_clear_lan_rx_queue_context(9)
• i40e_set_lan_rx_queue_context(9)

Like, that's a whole squad 💜 And yes — i40e_write_byte(9), i40e_write_dword(9) and i40e_write_qword(9) are all here too. The write family ate and left no crumbs 🍓

---

⭐ Sign-off ⭐

That's the whole page, bestie! 🎀 This one comes to you from the source/version path ./drivers/net/ethernet/intel/i40e, dated October 2026 — so like, future-dated manual page energy, we love that for us 💅✨ Go forth and replace those HMC context words 👑