si_dma_emit_fill_buffer(9)

📦 version 7.3.1, in nixpkgs unstable

💅 si_dma_emit_fill_buffer — bestie's guide to the sDMA fill vibe

okay so first things first: this page lives in the Kernel API Manual, section 9 (that's the kernel-API girlies, iykyk). Buckle up 🎀

✨ NAME ✨

si_dma_emit_fill_buffer — literally fills a buffer using the sDMA engine. that's the whole job. she's a one-trick pony and she ATE 💅

🌸 SYNOPSIS 🌸

void si_dma_emit_fill_buffer (struct amdgpu_ib *ib , uint32_t src_data ,
uint64_t dst_offset , uint32_t byte_count );

no return value, she just does it ✨ (returns void, so don't go looking for a status code, bestie, there isn't one 🙈)

🦋 ARGUMENTS 🦋

  • ib — the indirect buffer you're copying to. this is where the command gets emitted, bestie 🫶
  • src_data — the value you're writing into the buffer. it's a uint32_t, so it's the actual data, not a pointer, no cap ⭐
  • dst_offset — the destination GPU address. GPU address specifically, not some lil CPU pointer, okay? 👑
  • byte_count — how many bytes to xfer. that's "transfer" if you're being fancy 💖

🔥 DESCRIPTION 🔥

So what she does is: fill GPU buffers using the DMA engine, and specifically the (VI) flavor of it. that's it, that's the vibe check ✅

ngl the description section on this one is short and mysterious — she's giving main character energy with minimal lore 🧚 but the facts are: GPU buffers, DMA engine, VI. periodt.

🌈 SEE ALSO 🌈

Kernel file ./drivers/gpu/drm/amd/amdgpu/si_dma.c — go read the source, it's right there 🍓

and the whole si_dma friend group, all of them, no one left out 💜:

and that's the whole page, bestie ✨ this icon comes straight out of ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and yeah the footer's still gonna say si_dma_emit_fill_buffer(9) because the man page girlies don't change the footer for anyone 😭💖 see u next time, mwah 🫶🌸

📦 where this page comes from