ice_determine_css_hdr_len(9)

💖 ice_determine_css_hdr_len(9) 💖

okay so bestie, welcome to the Kernel API Manual — this one's a little function from the ice driver and honestly it's giving "quiet hero" energy. It's not flashy, it's not loud, it just shows up, does its one job, and leaves. Respect. 🫶

---

✨ NAME ✨

ice_determine_css_hdr_len — discover the CSS header length for the device 🎀

---

🌸 SYNOPSIS 🌸

int ice_determine_css_hdr_len (struct ice_hw *hw );

---

🦋 ARGUMENTS 🦋

• hw — pointer to the HW struct 💅 literally just a pointer to the hardware struct, that's the whole vibe, that's the only thing it wants from you

---

⭐ DESCRIPTION ⭐

So here's the tea: this function figures out the size of the CSS header sitting right at the start of the NVM module. ✨

And why do we care? Because it's genuinely useful for locating the Shadow RAM copy in the NVM — the Shadow RAM is always located just after the CSS header, no cap. So once you know how long the CSS header is, you know exactly where the Shadow RAM picks up. It's giving "find the doorway, the room's right behind it" energy. 🚪✨

---

🔥 RETURN 🔥

• zero on success 🎉
• or a negative error code on failure 😭 (cry about it, then check your error handling)

---

👑 SEE ALSO 👑

🧚 the kernel file itself

• Kernel file ./drivers/net/ethernet/intel/ice/ice_nvm.c — go read the source, iykyk

🌈 the whole friend group (aka every related function, in order, no skips)

• ice_aq_read_nvm(9)
• ice_read_flat_nvm(9)
• ice_aq_update_nvm(9)
• ice_aq_erase_nvm(9)
• ice_read_sr_word(9)
• ice_acquire_nvm(9)
• ice_release_nvm(9)
• ice_get_flash_bank_offset(9)
• ice_read_flash_module(9)
• ice_read_nvm_module(9)
• ice_read_nvm_sr_copy(9)
• ice_read_netlist_module(9)
• ice_get_pfa_module_tlv(9)
• ice_read_pba_string(9)
• ice_get_nvm_ver_info(9)
• ice_get_inactive_nvm_ver(9)
• ice_get_orom_civd_data(9)
• ice_get_orom_ver_info(9)
• ice_get_inactive_orom_ver(9)
• ice_get_netlist_info(9)
• ice_get_inactive_netlist_ver(9)
• ice_discover_flash_size(9)
• ice_read_sr_pointer(9)
• ice_read_sr_area_size(9)
• ice_determine_active_flash_banks(9)
• ice_get_nvm_css_hdr_len(9)
• ice_init_nvm(9)
• ice_nvm_validate_checksum(9)
• ice_nvm_write_activate(9)
• ice_aq_nvm_update_empr(9)

bestie there are thirty of them, I counted so you don't have to 💀 that's not a reading list, that's a whole semester

---

okay that's the whole page, mwah 💋 this little icon came from ./drivers/net/ethernet/intel/ice and the calendar says October 2026 — so like, go forth, determine those header lengths, and slay ✨💜🌈