sdma_v3_0_emit_fill_buffer(9)

📦 version 7.3.1, in nixpkgs unstable

💫 sdma_v3_0_emit_fill_buffer(9) 💫

okay so bestie, welcome to the Kernel API Manual ✨ — yes that's the whole manual name, we're fancy here — and today's main character is sdma_v3_0_emit_fill_buffer, which is literally the function that fills a buffer using the sDMA engine. no cap. 🎀

🌸 NAME 🌸

sdma_v3_0_emit_fill_buffer — fill buffer using the sDMA engine 💅

✨ SYNOPSIS ✨

void sdma_v3_0_emit_fill_buffer (struct amdgpu_ib *ib , uint32_t
src_data , uint64_t dst_offset , uint32_t byte_count );

like, that's the whole vibe check. void return, four args, no drama. 🦋

🫶 ARGUMENTS 🫶

  • ib — the indirect buffer we're copying to. this is the destination bestie, the one getting the glow-up. 💖
  • src_data — the value we're writing into the buffer. this is the content, the personality, the lore. 🌟
  • dst_offset — the dst GPU address. that's where in GPU-land this whole thing lands, fr fr. 📍
  • byte_count — number of bytes to xfer. how much of the good stuff is traveling. 📦

💜 DESCRIPTION 💜

Fill GPU buffers using the DMA engine (VI). that's it, that's the whole description — short and iconic, she ate and left no crumbs. 🔥

so yeah: you hand her an indirect buffer, a value, a GPU address, and a byte count, and she emits the fill through the sDMA engine on VI. simple. efficient. slay. 👑

🌈 SEE ALSO 🌈

okay this section is long and honestly she's a social butterfly, so let's get into it. first, the kernel file where all this lives:

  • Kernel file ./drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c

and now the whole friend group, in order, because we don't skip anyone in this house 🫶:

bestie note: sdma_v3_0_emit_copy_buffer(9) is her sibling, the copy girlie — fill and copy, two different jobs, don't mix them up iykyk 💀

mwah 💋 that's the page! sourced straight from ./drivers/gpu/drm/amd/amdgpu and dated October 2026 — yes, the future, we're early, we're always early 🧚‍♀️✨ bye bestie, go fill some buffers 💖🎀🦋

📦 where this page comes from