si_dma_emit_copy_buffer(9)

🌈 si_dma_emit_copy_buffer(9) 🌈

okay so bestie, welcome to the Kernel API Manual — this page is all about si_dma_emit_copy_buffer, and it's literally the sDMA copy-buffer moment. 💅✨

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🎀 NAME 🎀

si_dma_emit_copy_buffer — copy buffer using the sDMA engine 🫶

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✨ SYNOPSIS ✨

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

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💖 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 🙈

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👑 DESCRIPTION 👑

Copy GPU buffers using the DMA engine (VI). 🔥

Used by the amdgpu ttm implementation to move pages if registered as the asic copy callback. no cap, that's the whole vibe of this one. 💜

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🦋 SEE ALSO 🦋

• Kernel file: ./drivers/gpu/drm/amd/amdgpu/si_dma.c
• si_dma_ring_get_rptr(9)
• si_dma_ring_get_wptr(9)
• si_dma_ring_emit_fence(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_fill_buffer(9)

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made with 💖 in the Kernel API Manual — source/version ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and the page is si_dma_emit_copy_buffer(9) 🫶✨