sdma_v3_0_emit_copy_buffer(9)

hiii bestie 💖 welcome to the sdma_v3_0_emit_copy_buffer(9) page from the Kernel API Manual. this one is short and sweet, and yes, we are keeping every single detail. periodt.

🌸 NAME 🌸

sdma_v3_0_emit_copy_buffer — copy buffer using the sDMA engine

✨ SYNOPSIS ✨

void sdma_v3_0_emit_copy_buffer (struct amdgpu_ib *ib , uint64_t
src_offset , uint64_t dst_offset , uint32_t byte_count , uint32_t
copy_flags );

🎀 ARGUMENTS 🎀

• ib — indirect buffer to copy to
• src_offset — src GPU address
• dst_offset — dst GPU address
• byte_count — number of bytes to xfer
• copy_flags — unused

🦋 DESCRIPTION 🦋

okay so this is the copy-GPU-buffers move using the DMA engine (VI) 💅. It’s used by the amdgpu ttm implementation to move pages if registered as the asic copy callback. that’s the whole vibe, bestie.

🔥 SEE ALSO 🔥

• Kernel file: ./drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
• sdma_v3_0_init_microcode(9)
• sdma_v3_0_ring_get_rptr(9)
• sdma_v3_0_ring_get_wptr(9)
• sdma_v3_0_ring_set_wptr(9)
• sdma_v3_0_ring_emit_ib(9)
• sdma_v3_0_ring_emit_hdp_flush(9)
• sdma_v3_0_ring_emit_fence(9)
• sdma_v3_0_gfx_stop(9)
• sdma_v3_0_rlc_stop(9)
• sdma_v3_0_ctx_switch_enable(9)
• sdma_v3_0_enable(9)
• sdma_v3_0_gfx_resume(9)
• sdma_v3_0_rlc_resume(9)
• sdma_v3_0_start(9)
• sdma_v3_0_ring_test_ring(9)
• sdma_v3_0_ring_test_ib(9)
• sdma_v3_0_vm_copy_pte(9)
• sdma_v3_0_vm_write_pte(9)
• sdma_v3_0_vm_set_pte_pde(9)
• sdma_v3_0_ring_pad_ib(9)
• sdma_v3_0_ring_emit_pipeline_sync(9)
• sdma_v3_0_ring_emit_vm_flush(9)
• sdma_v3_0_emit_fill_buffer(9)

k bye bestie 🫶 signing off from the ./drivers/gpu/drm/amd/amdgpu source/version corner, dated October 2026, on the sdma_v3_0_emit_copy_buffer(9) page 💖✨