hcd_buffer_create(9)

💖 hcd_buffer_create(9) 💖

okay bestie, welcome to the Kernel API Manual — this one's hcd_buffer_create, and it's literally the moment your host controller gets its very own buffer pools ✨

---

NAME 🌸

hcd_buffer_create — initialize buffer pools

Yeah. That's it. That's the whole job. Slay.

---

SYNOPSIS 🎀

int hcd_buffer_create (struct usb_hcd *hcd );

---

ARGUMENTS 🦋

• hcd — the bus whose buffer pools are to be initialized 👑

---

CONTEXT 💅

task context, and no cap: this one might sleep 😴 so don't be out here calling it from somewhere spicy.

---

DESCRIPTION 🌈

Call this as part of initializing a host controller that uses the DMA memory allocators 💖

It initializes some pools of dma-coherent memory that will be shared by all the drivers using that controller — like, the whole friend group shares the snack stash, iykyk 🍓

When you're done with those pools, call hcd_buffer_destroy to clean up after them 🧹✨ (yes bestie, you have to actually clean up. main character energy includes aftercare.)

---

RETURN ⭐

• 0 if successful 😌💖
• a negative errno value otherwise 💀

---

SEE ALSO 🔥

• Kernel file ./drivers/usb/core/buffer.c
• hcd_buffer_destroy(9)

---

btw this whole page lives under ./drivers/usb/core 🫶 — dated October 2026 in the Kernel API Manual, and that's the whole vibe check. go forth and initialize your pools, bestie 💜✨🎀