__ap_send(9)

💖 NAME 💖

okay so bestie, welcome to __ap_send from the Kernel API Manual. Its whole entire job is literally: Send message to adjunct processor queue. That’s the vibe, no cap 🫶

---

✨ SYNOPSIS ✨

struct ap_queue_status __ap_send (ap_qid_t qid , unsigned long psmid ,
       void *msg , size_t msglen , int special );

---

🎀 ARGUMENTS 🎀

• qid — The AP queue number. iconic little queue ID, we love her 💅
• psmid — The program supplied message identifier.
• msg — The message text. the actual message, bestie ✨
• msglen — The message length.
• special — Special Bit. capital S, capital B, respect it 🎀

---

🔥 DESCRIPTION 🔥

Returns AP queue status structure. That’s the returned goodie 🦋

Condition code 1 on NQAP can’t happen because the L bit is 1. literally cannot happen, the L bit said no 💀

Condition code 2 on NQAP also means the send is incomplete, because a segment boundary was reached. The NQAP is repeated. so yeah, that’s the whole situation 🌸

---

🌈 SEE ALSO 🌈

Kernel file ./drivers/s390/crypto/ap_queue.c — that’s the kernel file, and here’s the whole friend group:

• ap_queue_enable_irq(9)
• ap_sm_recv(9)
• ap_sm_read(9)
• ap_sm_write(9)
• ap_sm_read_write(9)
• ap_sm_reset(9)
• ap_sm_reset_wait(9)
• ap_sm_setirq_wait(9)
• ap_sm_assoc_wait(9)
• ap_queue_message(9)
• ap_queue_usable(9)
• ap_cancel_message(9)
• __ap_flush_queue(9)

---

that’s the page, bestie 💜 signing off with source/version ./drivers/s390/crypto, dated October 2026, and page __ap_send(9). bye and slay 🦋✨