cik_sdma_rin...it_hdp_flush(9)

💅 cik_sdma_ring_emit_hdp_flush — the Kernel API Manual, bestie edition ✨

okay so real quick before we dive in: this is a page straight out of the Kernel API Manual (yes, the (9) section, we love a kernel-internals moment 👑). Strap in, it's short and sweet and honestly kind of iconic.

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🌸 NAME 🌸

cik_sdma_ring_emit_hdp_flush — literally emit an hdp flush on the DMA ring. that's the whole gig. no cap. 💅

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✨ SYNOPSIS ✨

void cik_sdma_ring_emit_hdp_flush (struct amdgpu_ring *ring );

like, it returns void — nothing comes back, it just does the thing. main character energy fr fr. 🦋

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🎀 ARGUMENTS 🎀

• ring — an amdgpu ring pointer. that's your ring bestie, the one you're flushing on. 🫶

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💖 DESCRIPTION 💖

so what it does: it emits an hdp flush packet on the requested DMA ring. that's it. that's the function. it takes the ring you handed it and pushes that flush packet out onto it, periodt. ✨

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🔥 SEE ALSO 🔥

the kernel file lives right here, go look, iykyk:

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

and the whole friend group of related functions, all of them, not skipping a single one (i would never 🙈):

• cik_sdma_init_microcode(9)
• cik_sdma_ring_get_rptr(9)
• cik_sdma_ring_get_wptr(9)
• cik_sdma_ring_set_wptr(9)
• cik_sdma_ring_emit_ib(9)
• cik_sdma_ring_emit_fence(9)
• cik_sdma_gfx_stop(9)
• cik_sdma_rlc_stop(9)
• cik_ctx_switch_enable(9)
• cik_sdma_enable(9)
• cik_sdma_gfx_resume(9)
• cik_sdma_rlc_resume(9)
• cik_sdma_load_microcode(9)
• cik_sdma_start(9)
• cik_sdma_ring_test_ring(9)
• cik_sdma_ring_test_ib(9)
• cik_sdma_vm_copy_pte(9)
• cik_sdma_vm_write_pte(9)
• cik_sdma_vm_set_pte_pde(9)
• cik_sdma_ring_pad_ib(9)
• cik_sdma_ring_emit_pipeline_sync(9)
• cik_sdma_ring_emit_vm_flush(9)
• cik_sdma_emit_copy_buffer(9)
• cik_sdma_emit_fill_buffer(9)

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okay bye bestie!! 🧚 this lil page came from ./drivers/gpu/drm/amd/amdgpu, dated October 2026 — go off, kernel docs, you ate. 💜🎀