si_dma_ring_emit_fence(9)

💖 si_dma_ring_emit_fence(9) 💖

okay so bestie, welcome to the Kernel API Manual — yes we're literally in the kernel docs together, this is our era ✨

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🌸 NAME 🌸

si_dma_ring_emit_fence — emit a fence on the DMA ring 🚧✨

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🎀 SYNOPSIS 🎀

void si_dma_ring_emit_fence (struct amdgpu_ring *ring , u64 addr , u64 seq , unsigned flags );

like, it returns void. nothing back. it just does the thing. main character behavior honestly 💅

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🦋 ARGUMENTS 🦋

• ring — the amdgpu ring pointer 🌀 like, which ring are we even talking to
• addr — the address 📍
• seq — the sequence number 🔢
• flags — the fence-related flags 🚩 (yes they're fence flags, not vibes flags, unfortunately)

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✨ DESCRIPTION ✨

so what this does is: it adds a DMA fence packet to the ring so the fence seq number gets written, and it also adds a DMA trap packet to generate an interrupt if needed (VI) 🫶

that's the whole thing. tiny function, big job. no cap 🔥

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🌈 SEE ALSO 🌈

the kernel file lives right here, bestie:

./drivers/gpu/drm/amd/amdgpu/si_dma.c

and it's giving friend group — here's everyone else in the squad 🧚:

• si_dma_ring_get_rptr(9)
• si_dma_ring_get_wptr(9)
• si_dma_ring_test_ring(9)
• si_dma_ring_test_ib(9)
• si_dma_vm_copy_pte(9)
• si_dma_vm_write_pte(9)
• si_dma_vm_set_pte_pde(9)
• si_dma_ring_pad_ib(9)
• si_dma_ring_emit_pipeline_sync(9)
• si_dma_ring_emit_vm_flush(9)
• si_dma_emit_copy_buffer(9)
• si_dma_emit_fill_buffer(9)

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💀 reminder: this is kernel-level stuff, so like, be normal about it. no guessing, no "it probably does X". read the actual source, iykyk 🍓

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okay that's the page!! mwah 🫶 from ./drivers/gpu/drm/amd/amdgpu, dated October 2026 — si_dma_ring_emit_fence(9) out 💜🎀