STRUCT TSA_INTRG(9)

💖 NAME 💖

okay so bestie, this is the struct tsa_intrg(9) page from the Kernel API Manual — and it's literally all about the Interrogate Transport-Status Area, aka Intrg. TSA ✨ it's giving kernel-struct realness, no cap 💅

struct tsa_intrg - Interrogate Transport-Status Area (Intrg. TSA). That's the name, that's the game 🎀

🦋 SYNOPSIS 🦋

here's the struct in all its glory — keep it exact, bestie, character for character:

       struct tsa_intrg {
           u32 format:8;
           u32 flags:8;
           u32 cu_state:8;
           u32 dev_state:8;
           u32 op_state:8;
           u32 :24;
           u8 sd_info[12];
           u32 dl_id;
           u8 dd_data[28];
        };

🎀 Members 🎀

• format — Format 🌸
• flags — Flags. Can be an arithmetic OR of the following constants:
  • TSA_INTRG_FLAGS_CU_STATE_VALID
  • TSA_INTRG_FLAGS_DEV_STATE_VALID
  • TSA_INTRG_FLAGS_OP_STATE_VALID
• cu_state — Controle-Unit State (yes, that spelling is what the page says, and we respect the iconique spelling moment 💅)
• dev_state — Device State 🫶
• op_state — Operation State ⭐
• sd_info — State-Dependent Information 💜
• dl_id — Device-Level Identifier 👑
• dd_data — Device-Dependent Data 🍓

also lowkey the synopsis has that unnamed u32 :24 field, and the Members list does not give it a description here — so we let it keep its main character mystery 🙈

🌈 SEE ALSO 🌈

Kernel file ./arch/s390/include/asm/fcx.h, plus these besties: struct tcw(9), struct tidaw(9), struct tsa_iostat(9), struct tsb(9), struct dcw_intrg_data(9), struct dcw(9), struct tccb_tcah(9), struct tccb_tcat(9), struct tccb(9). Go read them, iykyk 📚✨

source/version and date cuties: ./arch/s390/include/asm, October 2026 — mwah 💋