STRUCT DPNI_BUFFER_LAYOUT(9)

🌸 struct dpni_buffer_layout (9) — Kernel API Manual ✨

okay bestie, gather round, because we're about to get into the literal shape of a DPNI buffer 🫶 this page lives in the Kernel API Manual and it's the whole glow-up guide for how your data gets laid out. no cap, it's giving "interior design but for packets" 💅

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💖 NAME 💖

struct dpni_buffer_layout — the structure that represents the DPNI buffer layout, periodt. it's literally the blueprint, the main character of buffer arrangement 🌈

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🦋 SYNOPSIS 🦋

struct dpni_buffer_layout {
    u32 options;
    int pass_timestamp;
    int pass_parser_result;
    int pass_frame_status;
    u16 private_data_size;
    u16 data_align;
    u16 data_head_room;
    u16 data_tail_room;
 };

look at her. iconic. every field copy-pasted exactly because we do not mess with source code in this house 😤

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🎀 Members 🎀

okay so here's the member-by-member vibe check, and yes every single one is here, i would never do you dirty like that 💖

• options — the flags that represent the suggested modifications to the buffer layout 🔧 use any combination of 'DPNI_BUF_LAYOUT_OPT_<X>' flags. mix and match, you're the stylist 💅
• pass_timestamp — passes the timestamp value ⏰
• pass_parser_result — passes the parser results 🕵️‍♀️
• pass_frame_status — passes the frame status 📊
• private_data_size — the size kept for private data, in bytes 🔒 (bytes, bestie, bytes)
• data_align — the data alignment 📐
• data_head_room — the data head room 🧠✨
• data_tail_room — the data tail room 🍑

ngl this whole struct is just "where does everything go and how much space does it get" and honestly? relatable 😭

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⭐ SEE ALSO ⭐

the friend group 🫶 all of these are ride-or-die, go say hi:

• Kernel file ./drivers/net/ethernet/freescale/dpaa2/dpni.h
• DPNI_MAX_TC(9)
• DPNI_MAX_DPBP(9)
• DPNI_ALL_TCS(9)
• DPNI_ALL_TC_FLOWS(9)
• DPNI_NEW_FLOW_ID(9)
• DPNI_OPT_TX_FRM_RELEASE(9)
• DPNI_OPT_NO_MAC_FILTER(9)
• DPNI_OPT_HAS_POLICING(9)
• DPNI_OPT_SHARED_CONGESTION(9)
• DPNI_OPT_HAS_KEY_MASKING(9)
• DPNI_OPT_NO_FS(9)
• DPNI_OPT_SHARED_FS(9)
• struct dpni_pools_cfg(9)
• struct dpni_attr(9)
• DPNI_ERROR_EOFHE(9)
• DPNI_ERROR_FLE(9)
• DPNI_ERROR_FPE(9)
• DPNI_ERROR_PHE(9)
• DPNI_ERROR_L3CE(9)
• DPNI_ERROR_L4CE(9)
• enum dpni_error_action(9)
• struct dpni_error_cfg(9)
• DPNI_BUF_LAYOUT_OPT_TIMESTAMP(9)
• DPNI_BUF_LAYOUT_OPT_PARSER_RESULT(9)
• DPNI_BUF_LAYOUT_OPT_FRAME_STATUS(9)
• DPNI_BUF_LAYOUT_OPT_PRIVATE_DATA_SIZE(9)
• DPNI_BUF_LAYOUT_OPT_DATA_ALIGN(9)
• DPNI_BUF_LAYOUT_OPT_DATA_HEAD_ROOM(9)
• DPNI_BUF_LAYOUT_OPT_DATA_TAIL_ROOM(9)
• enum dpni_queue_type(9)
• enum dpni_offload(9)
• union dpni_statistics(9)
• struct dpni_link_cfg(9)
• struct dpni_link_state(9)
• enum dpni_dist_mode(9)
• enum dpni_fs_miss_action(9)
• struct dpni_fs_tbl_cfg(9)
• struct dpni_rx_tc_dist_cfg(9)
• DPNI_FS_MISS_DROP(9)
• struct dpni_rx_dist_cfg(9)
• struct dpni_qos_tbl_cfg(9)
• enum dpni_dest(9)
• struct dpni_queue(9)
• struct dpni_queue_id(9)
• enum dpni_congestion_unit(9)
• enum dpni_congestion_point(9)
• struct dpni_dest_cfg(9)
• DPNI_CONG_OPT_FLOW_CONTROL(9)
• struct dpni_congestion_notification_cfg(9)
• struct dpni_taildrop(9)
• struct dpni_rule_cfg(9)
• DPNI_FS_OPT_DISCARD(9)
• DPNI_FS_OPT_SET_FLC(9)
• DPNI_FS_OPT_SET_STASH_CONTROL(9)
• struct dpni_fs_action_cfg(9)
• struct dpni_tx_shaping_cfg(9)
• struct dpni_single_step_cfg(9)

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and that's the whole page, bestie 💜 this one came straight out of ./drivers/net/ethernet/freesca..., dated October 2026, and it's filed under struct dpni_buffer_layout(9) 🎀 go forth and lay out those buffers, you absolute icon 👑✨