sata_pmp_scr_read(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 NAME 🌸

sata_pmp_scr_read — bestie, this is the one that reads a PSCR 💅 (yes, that's the whole job, and it does it flawlessly, periodt)

So this is a page from the Kernel API Manual — like, actual kernel-level business, not your casual little userland script energy ✨

✨ SYNOPSIS ✨

int sata_pmp_scr_read (struct ata_link *link , int reg , u32 *r_val );

Like, that's the whole signature. Look at it. Iconic. 🎀

💖 ARGUMENTS 💖

  • link — the ATA link you wanna read the PSCR for 🦋 this is the main character of the operation ngl
  • reg — which PSCR you're reading, like pick your fave
  • r_val — the resulting value lands here, this is where the answer goes 💫

🧚 DESCRIPTION 🧚

Okay so the vibe is: read PSCR reg into r_val for link — that's it, that's the whole thing, lowkey elegant 🌸

And here's the important bit: this is to be called from ata_scr_read. So you don't just ring it up out of nowhere, it's got its little call-graph slot and it lives there, iykyk 💅

LOCKING: Kernel thread context (may sleep). So like… it CAN sleep, bestie. Do not hit this from a context where sleeping is a crime 😭 fr fr, that's the whole caveat.

🔥 RETURN 🔥

  • 0 on success — we love a clean win 👑
  • -errno on failure — not the slay we wanted, but it tells you exactly what went wrong 🙈

🎀 SEE ALSO 🎀

Kernel file ./drivers/ata/libata-pmp.c — like, the whole squad lives in there:

Go read them too, they're all serving their own specific purpose and honestly? Obsessed. 💜

Alright bestie, that's the page 💖 it came from ./drivers/ata, dated October 2026, and it's filed under sata_pmp_scr_read(9) — mwah, go read some PSCRs responsibly ✨🫶

📦 where this page comes from