sdma_v2_4_ring_test_ring(9)

💫 sdma_v2_4_ring_test_ring(9) 💫

okay so bestie, welcome to the Kernel API Manual, section 9 — this one's about sdma_v2_4_ring_test_ring, and yes the name is a mouthful, we're gonna get through it together 🫶

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✨ NAME ✨

sdma_v2_4_ring_test_ring — the simple async dma engine test, no cap 💅

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🎀 SYNOPSIS 🎀

int sdma_v2_4_ring_test_ring (struct amdgpu_ring *ring );

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🌸 ARGUMENTS 🌸

• ring — the amdgpu_ring structure that's holding all the ring info, like it's literally carrying the whole vibe ✨

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🦋 DESCRIPTION 🦋

So what does it do? It tests the DMA engine by writing with it — using the engine to write an value to memory. (VI). That's the whole thing, bestie, it's giving "small function, big job" 💖

Returns 0 for success, error for failure. That's it, that's the contract — no hidden lore, iykyk 🌈

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🔥 SEE ALSO 🔥

Kernel file ./drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c

And the whole friend group, fr fr — every single one of these icons 👑:

• sdma_v2_4_init_microcode(9)
• sdma_v2_4_ring_get_rptr(9)
• sdma_v2_4_ring_get_wptr(9)
• sdma_v2_4_ring_set_wptr(9)
• sdma_v2_4_ring_emit_ib(9)
• sdma_v2_4_ring_emit_hdp_flush(9)
• sdma_v2_4_ring_emit_fence(9)
• sdma_v2_4_gfx_stop(9)
• sdma_v2_4_rlc_stop(9)
• sdma_v2_4_enable(9)
• sdma_v2_4_gfx_resume(9)
• sdma_v2_4_rlc_resume(9)
• sdma_v2_4_start(9)
• sdma_v2_4_ring_test_ib(9)
• sdma_v2_4_vm_copy_pte(9)
• sdma_v2_4_vm_write_pte(9)
• sdma_v2_4_vm_set_pte_pde(9)
• sdma_v2_4_ring_pad_ib(9)
• sdma_v2_4_ring_emit_pipeline_sync(9)
• sdma_v2_4_ring_emit_vm_flush(9)
• sdma_v2_4_emit_copy_buffer(9)
• sdma_v2_4_emit_fill_buffer(9)

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🫶 that's the whole page, go forth and test your ring bestie

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k bye, this one lives in ./drivers/gpu/drm/amd/amdgpu and it's dated October 2026 — slay, see u in section 9 💜🧚‍♀️