STRUCT IWL_PCIE_TXQS(9)

💖 struct iwl_pcie_txqs(9) 💖

okay so bestie, welcome to the little kernel-API corner of the manual pages — this one's all about struct iwl_pcie_txqs, aka the TX queues data. it's giving "the vibes of your packets' travel itinerary" ✨ and ngl it's kind of iconic.

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🌸 NAME 🌸

struct iwl_pcie_txqs — TX queues data. that's it, that's the whole vibe. 💅

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🦋 SYNOPSIS 🦋

here's the whole structure, literally exactly like this, no cap:

struct iwl_pcie_txqs {
    unsigned long queue_used[BITS_TO_LONGS(IWL_MAX_TVQM_QUEUES)];
    unsigned long queue_stopped[BITS_TO_LONGS(IWL_MAX_TVQM_QUEUES)];
    struct iwl_txq *txq[IWL_MAX_TVQM_QUEUES];
    struct dma_pool *bc_pool;
    size_t bc_tbl_size;
    struct iwl_tso_hdr_page __percpu *tso_hdr_page;
    struct {
      u8 max_tbs;
      u16 size;
      u8 addr_size;
    } tfd;
    struct iwl_dma_ptr scd_bc_tbls;
 };

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🎀 Members 🎀

okay so let's go member by member, bestie — each one gets its moment:

• queue_used — bit mask of used queues. like a little attendance sheet but make it bits 💖
• queue_stopped — bit mask of stopped queues. same energy, but these ones are on pause ⏸️
• txq — array of TXQ data structures representing the TXQs. yes, the TXQs are represented by TXQ data structures, we love a self-explanatory queen 👑
• bc_pool — bytecount DMA allocations pool. it's the pool where the bytecount DMA allocations hang out 🏊
• bc_tbl_size — bytecount table size. literally the size. of the bytecount table. 🍓
• tso_hdr_page — page allocated (per CPU) for A-MSDU headers when doing TSO (and similar usage). per-CPU, so everyone gets their own lil page, very main character energy ✨
• tfd — TFD data. we'll get into it below 👇
• tfd.max_tbs — max number of buffers per TFD. the ceiling, the limit, the cap 🧢
• tfd.size — TFD size. iconic, self-describing, no notes 💅
• tfd.addr_size — TFD/TB address size. yes both TFD and TB, don't make me say it twice 😭
• scd_bc_tbls — gen1 pointer to the byte count table of the scheduler. gen1 specifically, bestie, don't get it twisted 🫶

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👑 SEE ALSO 👑

go read these next, i'm obsessed:

• Kernel file ./drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/internal.h
• struct iwl_rx_mem_buffer(9)
• struct iwl_rx_transfer_desc(9)
• struct iwl_rx_completion_desc(9)
• struct iwl_rx_completion_desc_bz(9)
• struct iwl_rxq(9)
• struct iwl_rb_allocator(9)
• iwl_get_closed_rb_stts(9)
• enum iwl_fw_mon_dbgfs_state(9)
• enum iwl_shared_irq_flags(9)
• enum iwl_image_response_code(9)
• struct cont_rec(9)
• enum iwl_pcie_imr_status(9)
• struct iwl_txq(9)
• struct iwl_trans_pcie(9)
• iwl_txq_inc_wrap(9)
• iwl_txq_dec_wrap(9)

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that's the whole page, bestie — go forth and slay your TX queues 🌈💜

source/version + date, coming at you from ./drivers/net/wireless/intel/i..., October 2026 — and the page itself, obviously, is struct iwl_pcie_txqs(9). mwah 💋