STRUCT IWL_SCD_QUEUE_CFG_CMD(9)

💅 struct iwl_scd_queue_cfg_cmd(9) — like, the scheduler queue allocation command bestie ✨

okay so this is a page from the Kernel API Manual, section 9, and it's all about struct iwl_scd_queue_cfg_cmd. it's giving "firmware tells the scheduler to allocate a queue" energy and honestly? iconic. let's get into it 🎀

---

🌸 NAME 🌸

struct iwl_scd_queue_cfg_cmd — the scheduler queue allocation command. that's it, that's the whole vibe. she allocates queues, she's booked and busy 💅

---

✨ SYNOPSIS ✨

bestie, look at her. look at the whole struct. every field, exactly as written, no notes:

struct iwl_scd_queue_cfg_cmd {
    __le32 operation;
    union {
      struct {
        __le32 sta_mask;
        u8 tid;
        u8 reserved[3];
        __le32 flags;
        __le32 cb_size;
        __le64 bc_dram_addr;
        __le64 tfdq_dram_addr;
      } add;
      struct {
        __le32 sta_mask;
        __le32 tid;
      } remove;
      struct {
        __le32 old_sta_mask;
        __le32 tid;
        __le32 new_sta_mask;
      } modify;
    } u;
 };

a union with three whole personalities inside — add, remove, modify — and she switches between them depending on what you're doing. main character energy fr fr 👑

---

🦋 Members 🦋

• operation — the actual operation you're doing, and for the full menu you gotta look at enum iwl_scd_queue_cfg_operation. lowkey the most important field here ngl.
• u — the union, and which part of it matters depends on the command usage. choose your fighter 💀

💖 the add era 💖

• u.add.sta_mask — station mask. bestie's name tag.
• u.add.tid — the TID. yes queen, traffic identifier.
• u.add.reserved — reserved. she's just there. don't touch. we respect her space 🙈
• u.add.flags — flags from enum iwl_tx_queue_cfg_actions…

⚠️ okay so this is the one exception: TX_QUEUE_CFG_ENABLE_QUEUE is not valid here. not allowed. not today. do not pass go. put it out of your mind entirely 💀

• u.add.cb_size — size code. short and sweet.
• u.add.bc_dram_addr — byte-count table IOVA. literally the address, keep it exact 🫶
• u.add.tfdq_dram_addr — TFD queue IOVA. also exact.

🧚 the remove era 🧚

• u.remove.sta_mask — station mask of the queue you're removing. bye bestie 👋
• u.remove.tid — TID of the queue you're removing.

🌈 the modify era 🌈

• u.modify.old_sta_mask — old station mask, for modify. the before pic.
• u.modify.tid — TID of the queue you're modifying.
• u.modify.new_sta_mask — new station mask, for modify. the after pic ✨

---

👑 SEE ALSO 👑

the whole friend group, and you WILL be introduced to every single one of them, no cap. kernel file ./drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h, plus:

• enum iwl_data_path_subcmd_ids(9)
• struct iwl_mu_group_mgmt_cmd(9)
• struct iwl_mu_group_mgmt_notif(9)
• struct iwl_time_sync_cfg_cmd(9)
• enum iwl_synced_time_operation(9)
• struct iwl_synced_time_cmd(9)
• struct iwl_synced_time_rsp(9)
• struct iwl_time_msmt_ptp_ctx(9)
• struct iwl_time_msmt_notify(9)
• struct iwl_time_msmt_cfm_notify(9)
• struct iwl_channel_estimation_cfg(9)
• enum iwl_thermal_dual_chain_req_events(9)
• struct iwl_thermal_dual_chain_request(9)
• struct iwl_rlc_properties(9)
• struct iwl_sad_properties(9)
• struct iwl_rlc_config_cmd(9)
• enum iwl_rx_baid_action(9)
• struct iwl_rx_baid_cfg_cmd_alloc(9)
• struct iwl_rx_baid_cfg_cmd_modify(9)
• struct iwl_rx_baid_cfg_cmd_remove_v1(9)
• struct iwl_rx_baid_cfg_cmd_remove(9)
• struct iwl_rx_baid_cfg_cmd(9)
• struct iwl_rx_baid_cfg_resp(9)
• enum iwl_scd_queue_cfg_operation(9)
• enum iwl_sec_key_flags(9)
• struct iwl_sec_key_cmd(9)

like, that's a lot of mutuals. go say hi 💜

---

and that's the page!! mwah 💋 this one came from ./drivers/net/wireless/intel/i..., dated October 2026, and it lives at struct iwl_s...ueue_cfg_cmd(9) — go forth and allocate queues responsibly bestie, ily, bye 🫶🎀