sdma_v6_0_g...ume_instance(9)

💖 sdma_v6_0_gfx_resume_instance(9) — the Kernel API Manual glow-up 💖

okay so bestie, gather round, because we're diving into sdma_v6_0_g...ume_instance(9) from the Kernel API Manual and honestly? it's giving "small function, big responsibilities." 🎀

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✨ NAME ✨

sdma_v6_0_gfx_resume_instance — start/restart a certain sdma engine. that's it. that's the whole vibe. one engine, your choice of which, and it's either waking up fresh or coming back from a nap. 💅

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🦋 SYNOPSIS 🦋

int sdma_v6_0_gfx_resume_instance (struct amdgpu_device *adev , int i ,
bool restore );

like, she returns an int, she takes three things, she's booked and busy. ✨

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🌸 ARGUMENTS 🌸

• adev — an amdgpu_device pointer. yes it's your whole device, no you can't just pass vibes, she needs the actual pointer. 🫶
• i — the instance. which sdma engine are we talking about? you tell her. 👑
• restore — used to restore wptr when restart. that's the whole job of this flag, no cap. 💀

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🔥 DESCRIPTION 🔥

so here's the tea: this function sets up the gfx DMA ring buffers and enables them. iconic behavior, truly. 😭

on restart, we will restore wptr and rptr — both of them, bestie, she's thorough like that. 💜

and the payoff? return 0 for success. that's the good ending. 🌈

ngl, restore is the main character here — it's literally the difference between "fresh start" and "pick up where we left off." don't sleep on it. 🙈

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⭐ SEE ALSO ⭐

the whole friend group, in order, no one left out: 💖

• the kernel file itself: ./drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c 🎀
• sdma_v6_0_ring_get_rptr(9)
• sdma_v6_0_ring_get_wptr(9)
• sdma_v6_0_ring_set_wptr(9)
• sdma_v6_0_ring_emit_mem_sync(9)
• sdma_v6_0_ring_emit_hdp_flush(9)
• sdma_v6_0_ring_emit_fence(9)
• sdma_v6_0_gfx_stop(9)
• sdma_v6_0_rlc_stop(9)
• sdma_v6_0_ctxempty_int_enable(9)
• sdma_v6_0_enable(9)
• sdma_v6_0_gfx_resume(9)
• sdma_v6_0_rlc_resume(9)
• sdma_v6_0_load_microcode(9)
• sdma_v6_0_start(9)
• sdma_v6_0_ring_test_ring(9)
• sdma_v6_0_vm_copy_pte(9)
• sdma_v6_0_vm_write_pte(9)
• sdma_v6_0_vm_set_pte_pde(9)
• sdma_v6_0_ring_emit_pipeline_sync(9)
• sdma_v6_0_emit_copy_buffer(9)
• sdma_v6_0_emit_fill_buffer(9)

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and that's the post! 🦋 this little gem lives in ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and the manual it's chilling in is sdma_v6_0_g...ume_instance(9). slay, go read the source, mwah 💋💖✨