heci_read_hbuf(9)

📦 version 7.3.1, in nixpkgs unstable

💅 heci_read_hbuf(9) — like, the read-from-hardware-buffer girlie ✨

okay so bestie, welcome to the Kernel API Manual entry for heci_read_hbuf — this is the function that literally reads data out of the hardware buffer, and honestly? she's iconic for it. 🎀

🌸 NAME 🌸

heci_read_hbuf — read data from hardware buffer 💖 (yes that's it, that's the whole vibe, no cap)

✨ SYNOPSIS ✨

int heci_read_hbuf (struct issei_device *idev , void *data , size_t
data_len );

like, that's the whole signature. she takes three things and returns an int. periodt. 🫶

🦋 ARGUMENTS 🦋

  • idev — the device structure 👑 this is your main character, the struct issei_device * you're working with
  • data — the buffer to store read data 🍓 this is where the read data goes to live, void * energy
  • data_len — the buffer size 🌸 how big that data buffer actually is, as a size_t

💀 RETURN 💀

  • 0 on success 🎉 slay
  • <0 on error 😭 not slay, something went wrong

🔥 SEE ALSO 🔥

first up, the kernel file this all lives in: ./drivers/misc/issei/hw_heci.c — go read it, iykyk 💜

and then, literally, the whole friend group of related pages:

like, that's the entire roster. go off. 🌈

ngl bestie, if you're poking at the hardware buffer, read the buffer before you do anything weird with it, ok? 0 means good, <0 means go check your error path. 🙈

kisses and good vibes from ./drivers/misc/issei — this one's dated October 2026, mwah 💋✨

📦 where this page comes from