si_dma_vm_copy_pte(9)

💅 si_dma_vm_copy_pte(9) — from the Kernel API Manual, bestie ✨

okay so picture this: you're deep in the Kernel API Manual, section 9, and the main character of today's episode is si_dma_vm_copy_pte. no cap, this one's a whole vibe. let's get into it 🫶

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✨ NAME ✨

si_dma_vm_copy_pte — literally the function that updates PTEs by copying them from the GART 💫

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🌸 SYNOPSIS 🌸

void si_dma_vm_copy_pte (struct amdgpu_ib *ib , uint64_t pe , uint64_t
src , unsigned count );

that's the whole signature, copy it exactly, don't be weird about it 💅

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🎀 ARGUMENTS 🎀

• ib — the indirect buffer you're filling up with commands, bestie. it's giving "blank canvas, but make it GPU" 🖌️
• pe — the addr of the page entry. yes, addr, the original said addr, we keep addr 😌
• src — the src addr to copy from. so like, where the good stuff lives 🔥
• count — how many page entries we're updating. the more the merrier fr fr 🌈

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🦋 DESCRIPTION 🦋

so what does it actually do? Update PTEs by copying them from the GART using DMA (SI). that's it, that's the tea ☕✨ short and iconic, just like this description. no notes. periodt. 👑

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👑 SEE ALSO 👑

the lore expands, and honestly? the supporting cast ate 💖

• the 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_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)

like, go read them too, they're all connected iykyk 🧚‍♀️

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ngl this page is short but she's doing her best and that's main character energy 💜

and that's the whole page, bestie!! 🍓 this one came from ./drivers/gpu/drm/amd/amdgpu and it's dated October 2026 — so mark your calendars, si_dma_vm_copy_pte(9) is out here living her best life. mwah 💋🎀💖