ENUM IDPF_QUEUE_FLAGS_T(9)

🎀 NAME 🎀

Okay bestie, this is enum idpf_queue_flags_t(9) from the Kernel API Manual — yes, the kernel API one, we love a niche icon 💅✨

enum idpf_queue_flags_t -

That’s the whole NAME entry, short and iconic, no cap 🫶

🦋 SYNOPSIS 🦋

The enum lineup, exactly as the kernel serves it:

       enum idpf_queue_flags_t {
           __IDPF_Q_GEN_CHK ,
           __IDPF_Q_RFL_GEN_CHK ,
           __IDPF_Q_FLOW_SCH_EN ,
           __IDPF_Q_SW_MARKER ,
           __IDPF_Q_CRC_EN ,
           __IDPF_Q_RSC_EN ,
           __IDPF_Q_HSPLIT_EN ,
           __IDPF_Q_PTP ,
           __IDPF_Q_NOIRQ ,
           __IDPF_Q_XDP ,
           __IDPF_Q_XSK ,
           __IDPF_Q_FLAGS_NBITS

       };

✨ Constants ✨

Here’s the flag-by-flag tea, bestie ☕👑

• __IDPF_Q_GEN_CHK — so queues operating in splitq mode use a generation bit to identify new descriptor writebacks on the ring. HW sets the gen bit to 1 on the first writeback of any given descriptor. After the ring wraps, HW sets the gen bit of those descriptors to 0, and keeps flipping 0->1 or 1->0 on each ring wrap. SW maintains its own gen bit to know what value will indicate writebacks on the next pass around the ring. E.g. it is initialized to 1 and knows that reading a gen bit of 1 in any descriptor on the initial pass of the ring indicates a writeback. It also flips on every ring wrap. Literally the ring’s little “new mail” indicator 💌
• __IDPF_Q_RFL_GEN_CHK — refill queues are SW only, so Q_GEN acts as the HW bit and Q_RFL_GEN is the SW bit. Cute little division of labor 🌸
• __IDPF_Q_FLOW_SCH_EN — Enable flow scheduling. Slay 💫
• __IDPF_Q_SW_MARKER — Used to indicate TX queue marker completions. Marker business, very main character 🎀
• __IDPF_Q_CRC_EN — enable CRC offload in singleq mode. Put that CRC work on offload duty 💅
• __IDPF_Q_RSC_EN — enable Receive Side Coalescing on Rx (splitq). Coalescing era ✨
• __IDPF_Q_HSPLIT_EN — enable header split on Rx (splitq). Header split, we love to see it 🦋
• __IDPF_Q_PTP — indicates whether the Rx timestamping is enabled for the queue. Timestamp vibes ⏰
• __IDPF_Q_NOIRQ — queue is polling-driven and has no interrupt. No IRQ, just polling energy 👀
• __IDPF_Q_XDP — this is an XDP queue. XDP bestie detected 🔥
• __IDPF_Q_XSK — the queue has an XSk pool installed. Pool installed, periodt 🏊
• __IDPF_Q_FLAGS_NBITS — Must be last. Like, literally must be last, no cap 💀

🌈 SEE ALSO 🌈

Kernel file ./drivers/net/ethernet/intel/idpf/idpf_txrx.h has the whole friend group:

• struct idpf_tx_offload_params(9)
• struct idpf_tx_splitq_params(9)
• struct idpf_vec_regs(9)
• struct idpf_intr_reg(9)
• struct idpf_q_vector(9)
• struct idpf_rx_queue(9)
• struct idpf_tx_queue(9)
• struct idpf_buf_queue(9)
• struct idpf_compl_queue(9)
• struct idpf_sw_queue(9)
• struct idpf_rxq_set(9)
• struct idpf_bufq_set(9)
• struct idpf_rxq_group(9)
• struct idpf_txq_group(9)
• idpf_size_to_txd_count(9)
• idpf_tx_singleq_build_ctob(9)
• idpf_tx_splitq_build_desc(9)
• idpf_vport_intr_set_wb_on_itr(9)
• idpf_tx_splitq_get_free_bufs(9)

This cutie comes from ./drivers/net/ethernet/intel/idpf, dated October 2026 — mwah, slay, bye bestie 🫶💖🎀