cik_sdma_fence_ring_emit(9)

💅 cik_sdma_fence_ring_emit (9)

okay so bestie, welcome to the Kernel API Manual ✨ this one's a little function from the radeon driver fam and it's lowkey iconic, let me tell you everything 🫶

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✨ NAME ✨

cik_sdma_fence_ring_emit — emit a fence on the DMA ring 🔥

like, that's literally her whole job. put a fence on the ring. slay.

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🌸 SYNOPSIS 🌸

void cik_sdma_fence_ring_emit (struct radeon_device *rdev , struct
       radeon_fence *fence );

no return value, no drama, just vibes and a void 💅

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🎀 ARGUMENTS 🎀

• rdev — a radeon_device pointer 👑 (the device, the main character)
• fence — a radeon_fence object 🦋 (the fence in question, she's the guest of honour)

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💖 DESCRIPTION 💖

so what she does is: add a DMA fence packet to the ring so it writes the fence seq number 📝, and also adds a DMA trap packet to generate an interrupt if needed ⚡ — and all of this is the CIK flavour, iykyk. periodt.

ngl this is the kind of function that looks small and then carries the whole queue, no cap 😭

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/radeon/cik_sdma.c
• cik_sdma_get_rptr(9)
• cik_sdma_get_wptr(9)
• cik_sdma_set_wptr(9)
• cik_sdma_ring_ib_execute(9)
• cik_sdma_hdp_flush_ring_emit(9)
• cik_sdma_semaphore_ring_emit(9)
• cik_sdma_gfx_stop(9)
• cik_sdma_rlc_stop(9)
• cik_sdma_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_resume(9)
• cik_sdma_fini(9)
• cik_copy_dma(9)
• cik_sdma_ring_test(9)
• cik_sdma_ib_test(9)
• cik_sdma_is_lockup(9)
• cik_sdma_vm_copy_pages(9)
• cik_sdma_vm_write_pages(9)
• cik_sdma_vm_set_pages(9)
• cik_sdma_vm_pad_ib(9)

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okay that's the whole page bestie, go forth and read the source 🧚💜

🌟 cute little sign-off: this one lives in ./drivers/gpu/drm/radeon, dated October 2026, and it's brought to you by the very manual you're reading rn. mwah 💋🎀