qdio_allocate(9)

✨ qdio_allocate(9) ✨

okay so bestie, welcome to the qdio_allocate page 💅 this one lives in the Kernel API Manual and honestly? it's giving "set up your queues before the real party starts" energy 🎀

---

🌸 NAME 🌸

qdio_allocate — allocate qdio queues and associated data 🦋

like, it literally allocates the qdio queues and all the little data bits that come attached to them. no cap.

---

✨ SYNOPSIS ✨

int qdio_allocate (struct ccw_device *cdev , unsigned int no_input_qs ,
       unsigned int no_output_qs );

so it returns an int, takes a struct ccw_device * and two unsigned ints, and it's literally right there in the signature 👑

---

🧚 ARGUMENTS 🧚

• cdev — the associated ccw device 💖 this is your main character, the device everything hangs off of.
• no_input_qs — allocate this number of Input Queues 🍓 exactly that many, bestie, you pick the count.
• no_output_qs — allocate this number of Output Queues 🌈 same deal, you say how many, it makes how many.

ngl the whole vibe here is "you tell me how many queues you want, I set them up" — input queues and output queues, separately counted 🫶

---

🔥 SEE ALSO 🔥

Kernel file ./drivers/s390/cio/qdio_main.c, plus the whole friend group:

• do_siga_output(9)
• qdio_do_eqbs(9)
• qdio_do_sqbs(9)
• qdio_get_ssqd_desc(9)
• qdio_shutdown(9)
• qdio_free(9)
• qdio_establish(9)
• qdio_activate(9)
• handle_inbound(9)
• qdio_add_bufs_to_input_queue(9)
• handle_outbound(9)
• qdio_add_bufs_to_output_queue(9)
• qdio_start_irq(9)
• qdio_stop_irq(9)

like, that's the whole squad 😭 go read them, they're iconic 👑

---

that's the page, bestie 💜 source/version is ./drivers/s390/cio and it's dated October 2026 — periodt, go allocate some queues ✨🎀