ENUM IDPF_STATE(9)

💅 enum idpf_state(9) — the bring-up state machine, explained in the group chat

okay so bestie, gather round, because this is a kernel API Manual page (section 9, the kernel-api girlies know) and it's literally all about enum idpf_state — the state machine that handles bring up. that's it, that's the whole vibe. it's a little enum that walks you through waking an idpf thing up, step by step, in order, no skipping. 🎀

---

✨ NAME ✨

enum idpf_state — the state machine to handle bring up. yes queen, it's giving "getting out of bed in the morning" but for a network driver. 🦋

---

🌸 SYNOPSIS 🌸

enum idpf_state {
    __IDPF_VER_CHECK ,
    __IDPF_GET_CAPS ,
    __IDPF_INIT_SW ,
    __IDPF_STATE_LAST

};

like, look at her. four members. clean. tiny. iconic. and you can't reorder them, more on that below. 👑

---

⭐ Constants ⭐

• __IDPF_VER_CHECK — negotiate virtchnl version. first things first, bestie: you gotta agree on which virtchnl version you're speaking before you say literally anything else. communication is key fr fr 💬
• __IDPF_GET_CAPS — negotiate capabilities. now you find out what this thing can actually do, and you sort out the capabilities together. vibe check, but for hardware. ✨
• __IDPF_INIT_SW — init based on given capabilities. the software init step, and ngl it's built off the capabilities you just negotiated — so like, don't skip the previous step, that would be a whole mess 😭
• __IDPF_STATE_LAST — must be last, used to determine size. she's the sentinel, she's the boundary, she's the reason the enum knows how big it is. must be last, do not move her, do not pass go 🙈 periodt

---

🫶 SEE ALSO 🫶

Kernel file ./drivers/net/ethernet/intel/idpf/idpf.h — and then the whole extended friend group, all section 9, all linked:

• struct idpf_mac_filter(9)
• enum idpf_flags(9)
• enum idpf_cap_field(9)
• enum idpf_vport_state(9)
• struct idpf_netdev_priv(9)
• struct idpf_reset_reg(9)
• struct idpf_vport_max_q(9)
• struct idpf_reg_ops(9)
• struct idpf_dev_ops(9)
• enum idpf_vport_reset_cause(9)
• enum idpf_vport_flags(9)
• struct idpf_tstamp_stats(9)
• struct idpf_q_vec_rsrc(9)
• struct idpf_vport(9)
• enum idpf_user_flags(9)
• struct idpf_rss_data(9)
• struct idpf_q_coalesce(9)
• struct idpf_vport_user_config_data(9)
• enum idpf_vport_config_flags(9)
• struct idpf_avail_queue_info(9)
• struct idpf_vector_info(9)
• struct idpf_vector_lifo(9)
• struct idpf_queue_id_reg_chunk(9)
• struct idpf_queue_id_reg_info(9)
• struct idpf_vport_config(9)
• struct idpf_adapter(9)
• idpf_is_queue_model_split(9)
• idpf_is_rdma_cap_ena(9)
• idpf_get_reserved_vecs(9)
• idpf_get_reserved_rdma_vecs(9)
• idpf_get_default_vports(9)
• idpf_get_max_vports(9)
• idpf_get_max_tx_bufs(9)
• idpf_get_min_tx_pkt_len(9)
• idpf_is_reset_detected(9)
• idpf_is_reset_in_prog(9)
• idpf_netdev_to_vport(9)
• idpf_netdev_to_adapter(9)
• idpf_is_feature_ena(9)
• idpf_get_max_tx_hdr_size(9)
• idpf_vport_ctrl_lock(9)
• idpf_vport_ctrl_unlock(9)

---

lowkey a full reading list, but like… they're all your besties too, so it's fine 💅

---

sign-off time 🧚💖 — this whole thing comes from the source tree at ./drivers/net/ethernet/intel/idpf, dated October 2026, living in section 9 of the kernel api manual as enum idpf_state(9). go drink some water and go read idpf.h, ily, bye 🍓🦋