STRUCT VIRTCHNL2_RX_FLEX_DESC_NIC(9)

💖 struct virtchnl2_rx_flex_desc_nic — RX descriptor writeback format 💖

okay so bestie, we're deep in the Kernel API Manual today and this one is a lil struct from ./include/linux/net/intel — the RX descriptor writeback format. it's giving "I know what every single bit does" energy and honestly? iconic. let's get into it 🎀

✨ SYNOPSIS ✨

struct virtchnl2_rx_flex_desc_nic {
    u8 rxdid;
    u8 mir_id_umb_cast;
    __le16 ptype_flex_flags0;
    __le16 pkt_len;
    __le16 hdr_len_sph_flex_flags1;
    __le16 status_error0;
    __le16 l2tag1;
    __le32 rss_hash;
    __le16 status_error1;
    u8 flexi_flags2;
    u8 ts_low;
    __le16 l2tag2_1st;
    __le16 l2tag2_2nd;
    __le32 flow_id;
    union {
      struct {
        __le16 rsvd;
        __le16 flow_id_ipv6;
      } flex;
      __le32 ts_high;
    } flex_ts;
 };

like, look at her. so many little fields, all doing their own main character thing 🫶

🌸 Members 🌸

• rxdid — the descriptor builder profile id. her whole identity fr.
• mir_id_umb_cast — packed up like umb_cast=[7:6], mir=[5:0]. bits sharing a room, no cap.
• ptype_flex_flags0 — ff0=[15:10], ptype=[9:0]. flags first, ptype chillin' below 💅
• pkt_len — packet length, and hey, heads up: [15:14] are reserved. don't touch those bits bestie 🙈
• hdr_len_sph_flex_flags1 — ff1/ext=[15:12], sph=[11], header=[10:0]. three things in one field, she's multitasking ✨
• status_error0 — Status/Error section 0. the first of the status/error twins.
• l2tag1 — the stripped L2 tag from the received packet 🎀
• rss_hash — RSS hash. she's spreading the load, queen behavior 👑
• status_error1 — Status/Error section 1. the sequel, and honestly it ate 💀
• flexi_flags2 — Flexible flags section 2. flexible literally in the name 🧚
• ts_low — lower word of timestamp value. the low half, holding it down.
• l2tag2_1st — First L2TAG2. yes, there's a second one, keep reading.
• l2tag2_2nd — Second L2TAG2. told you 💖
• flow_id — flow id. simple, iconic, no notes.
• flex_ts — the timestamp and flexible flow id union. she contains multitudes 🌈
  • flex_ts.flex.rsvd — Reserved. nothing to see here, move along 🦋
  • flex_ts.flex.flow_id_ipv6 — IPv6 flow id.
  • flex_ts.ts_high — timestamp higher word of the timestamp value. the high half, matching ts_low for the full picture ✨

🔥 Description 🔥

Profile ID 0x2, SingleQ, flex writeback format. periodt. that's the vibe check and she passed 💅

⭐ SEE ALSO ⭐

• kernel file ./include/linux/net/intel/virtchnl2_lan_desc.h
• struct virtchnl2_splitq_rx_buf_desc(9)
• struct virtchnl2_singleq_rx_buf_desc(9)
• struct virtchnl2_singleq_base_rx_desc(9)
• struct virtchnl2_rx_flex_desc_adv_nic_3(9)

go read those next, iykyk 🫶

mwah 💋 that's the whole page! this lil beauty lives in ./include/linux/net/intel, dated October 2026, and she's filed under struct virt...lex_desc_nic(9) in the Kernel API Manual. love her, know her, cite her correctly bestie 🌸💖✨