sdma_v7_1_ring_test_ib(9)

📦 version 7.3.1, in nixpkgs unstable

💅 sdma_v7_1_ring_test_ib(9) — the Kernel API Manual one, bestie

okay so this is a page straight out of the Kernel API Manual (yes, the (9) means kernel-level, we're in the big leagues now 🫶) and it's about poking an IB at a DMA engine to see if it vibes. let me walk you through it, no cap.

✨ NAME ✨

sdma_v7_1_ring_test_ib — literally just: test an IB on the DMA engine. that's the whole assignment. 🎀

🌸 SYNOPSIS 🌸

int sdma_v7_1_ring_test_ib (struct amdgpu_ring *ring , long timeout );

it returns an int, it takes a ring, it takes a timeout. iconic signature, zero notes. ⭐

🦋 ARGUMENTS 🦋

okay these two, bestie, they're the whole personality of the function:

  • ring — the amdgpu_ring structure that's holding all the ring information. it's giving "this is my ring, there are many like it but this one is mine" energy 👑
  • timeout — the timeout value, measured in jiffies, or alternatively MAX_SCHEDULE_TIMEOUT. yes, jiffies. yes, that's really what they're called. not a typo, no notes, slay 💀

🔥 DESCRIPTION 🔥

so the actual job? Test a simple IB in the DMA ring. that's it, that's the function. it goes in, it does the little test-IB moment, and then:

  • returns 0 on success 🎉 (we love a zero, zero is the good number here, don't get it twisted)
  • returns an error on failure 😭
lowkey important: 0 = slay, error = not slay. do not confuse them, i'm begging 🙈

🧚 SEE ALSO 🧚

the whole friend group, fr fr — go read these next:

Kernel file ./drivers/gpu/drm/amd/amdgpu/sdma_v7_1.c

and that's the page!! 💜 written down under ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and yeah — the manual name up top really is sdma_v7_1_ring_test_ib(9), no we're not shortening it, it's part of the brand now.

go test that IB, bestie. you're gonna eat. 💅✨

📦 where this page comes from