amdgpu_debu...gs_pcie_read(9)

📦 version 7.3.1, in nixpkgs unstable

✨ amdgpu_debugfs_regs_pcie_read ✨

okay so bestie, welcome to the amdgpu_debugfs_regs_pcie_read(9) manual page — it's living in the Kernel API Manual, and it's literally all about reading from a PCIE register 💅 buckle up.

🌸 SYNOPSIS 🌸

ssize_t amdgpu_debugfs_regs_pcie_read (struct file *f , char __user *buf
, size_t size , loff_t *pos );

like, that's the whole signature, no cap 🫶

🎀 ARGUMENTS 🎀

  • f — the open file handle, aka your golden ticket into this whole situation ✨
  • buf — the user buffer where the read data gets stored, it's giving delivery destination 📦
  • size — number of bytes to read, so you know exactly how much tea we're spilling 🍵
  • pos — the offset to seek to, aka where you wanna start your little reading journey 🦋

💖 DESCRIPTION 💖

so here's the vibe: the lower bits are the BYTE offset of the register to read. yes, BYTE offset, not word offset, not vibe offset, BYTE 🔥

and the iconic part? this lets you read multiple registers in a single call and have the returned size reflect that. it's giving efficiency, it's giving main character energy, it's giving "why read one register when you could read several" 👑

🌈 SEE ALSO 🌈

the kernel file lives at: ./drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c

and here's the whole friend group, all of them, not skipping a single one because they ALL matter:

ok that's the whole page bestie, every detail preserved, every flag accounted for, we ate and left no crumbs 💅✨

and for the cute sign-off: this whole thing lives under ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and yeah the manual name is literally amdgpu_debu...gs_pcie_read(9) (the truncation is part of the aesthetic apparently 😭). periodt. 🫶💖

📦 where this page comes from