STRUCT IL_DEVICE_CMD(9)

💅 struct il_device_cmd(9) — from the Kernel API Manual, bestie 🎀

okay so picture this: you're deep in the iwlegacy wireless driver and you need a struct that's basically the "how big can this command get" bouncer for the command and tx queues. that's her. that's struct il_device_cmd. say hi 👋

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✨ NAME ✨

struct il_device_cmd — (yes the original NAME line literally has no description after the dash, she's mysterious like that 💅 no cap, nothing was there, so nothing's added 🫶)

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🌸 SYNOPSIS 🌸

struct il_device_cmd {
    struct il_cmd_header hdr;
    union {
      u32 flags;
      u8 val8;
      u16 val16;
      u32 val32;
      struct il_tx_cmd_hdr tx;
      u8 payload[DEF_CMD_PAYLOAD_SIZE];
    } cmd;
 };

like, look at that union. she contains multitudes 💖 flags, val8, val16, val32, tx, and a whole payload array sized DEF_CMD_PAYLOAD_SIZE. one struct, so many moods ✨

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🦋 Members 🦋

fr fr the original page gives this heading and then… nothing. zero members listed. an empty section, living her best minimal life 🙈 so we're not inventing any — that's the whole vibe check 🫶

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🎀 Description 🎀

okay so here's the actual tea ☕ — this struct is all about allocation of the command and tx queues. when the driver sets up those queues, struct il_device_cmd is what establishes the overall size of the largest command we send to uCode.

and yes, there's exactly one exception, bestie, and it's the big one: a scan command, which is relatively huge 😭 — the original is very clear that its space is allocated separately. so don't try to squeeze a scan command in here, she's not built for that, literally 💀

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👑 SEE ALSO 👑

the whole friend group 🫶 go say hi:

• Kernel file ./drivers/net/wireless/intel/iwlegacy/common.h
• struct il_device_cmd_huge(9)
• struct il_rx_queue(9)
• struct il_ht_agg(9)
• struct il_vif_priv(9)
• struct il_hw_params(9)
• struct il_cfg(9)
• il_clear_driver_stations(9)
• il_sta_id_or_broadcast(9)
• il_queue_inc_wrap(9)
• il_queue_dec_wrap(9)
• il_beacon_time_mask_low(9)
• il_beacon_time_mask_high(9)
• struct il_rb_status(9)
• struct il_tfd_tb(9)
• struct il_tfd(9)
• struct il_rate_scale_data(9)
• struct il_scale_tbl_info(9)
• struct il_lq_sta(9)
• il3945_rate_scale_init(9)

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ok and one little PSA 🫶: this page lives at ./drivers/net/wireless/intel/i... in the source tree, and she's dated October 2026. iconic. periodt. 🎀✨

that's the whole page, bestie — go forth and allocate responsibly 💜🌸