cik_copy_cpdma(9)

💅 cik_copy_cpdma(9) — Kernel API Manual ✨

okay so this is a page from the Kernel API Manual, bestie, and it's about cik_copy_cpdma — literally the function that copies pages using the CP DMA engine. buckle up 🎀

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🌸 NAME 🌸

cik_copy_cpdma — copy pages using the CP DMA engine 🦋

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⭐ SYNOPSIS ⭐

struct radeon_fence * cik_copy_cpdma (struct radeon_device *rdev ,
uint64_t src_offset , uint64_t dst_offset , unsigned num_gpu_pages ,
struct dma_resv *resv );

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🎀 ARGUMENTS 🎀

• rdev — a radeon_device pointer, iykyk 💖
• src_offset — the src GPU address, aka where we're copying from ✨
• dst_offset — the dst GPU address, aka where it's going 🫶
• num_gpu_pages — how many GPU pages to xfer, no cap 📦
• resv — the reservation object to sync to 🔥

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👑 DESCRIPTION 👑

So what it does: it copies GPU paging using the CP DMA engine (CIK+). 💅 That's it, that's the vibe.

It's used by the radeon ttm implementation to move pages if it's registered as the asic copy callback. main character energy fr fr 🌈

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🦋 SEE ALSO 🦋

the Kernel file ./drivers/gpu/drm/radeon/cik.c 💜

and like, a whole friend group of functions, periodt:

cik_get_allowed_info_register(9), cik_get_xclk(9), cik_mm_rdoorbell(9), cik_mm_wdoorbell(9), cik_srbm_select(9), ci_mc_load_microcode(9), cik_init_microcode(9), cik_tiling_mode_table_init(9), cik_select_se_sh(9), cik_create_bitmask(9), cik_get_rb_disabled(9), cik_setup_rb(9), cik_gpu_init(9), cik_scratch_init(9), cik_ring_test(9), cik_hdp_flush_cp_ring_emit(9), cik_fence_gfx_ring_emit(9), cik_fence_compute_ring_emit(9), cik_semaphore_ring_emit(9), cik_ring_ib_execute(9), cik_ib_test(9), cik_cp_gfx_enable(9), cik_cp_gfx_load_microcode(9), cik_cp_gfx_start(9), cik_cp_gfx_fini(9), cik_cp_gfx_resume(9), cik_cp_compute_enable(9), cik_cp_compute_load_microcode(9), cik_cp_compute_start(9), cik_cp_compute_fini(9), cik_cp_compute_resume(9), cik_gpu_check_soft_reset(9), cik_gpu_soft_reset(9), cik_asic_reset(9), cik_gfx_is_lockup(9), cik_mc_program(9), cik_mc_init(9), cik_pcie_gart_tlb_flush(9), cik_pcie_gart_enable(9), cik_pcie_gart_disable(9), cik_pcie_gart_fini(9), cik_ib_parse(9), cik_vm_init(9), cik_vm_fini(9), cik_vm_decode_fault(9), cik_rlc_stop(9), cik_rlc_start(9), cik_rlc_resume(9), cik_enable_interrupts(9), cik_disable_interrupts(9), cik_disable_interrupt_state(9), cik_irq_init(9), cik_irq_set(9), cik_irq_ack(9), cik_irq_disable(9), cik_irq_suspend(9), cik_irq_fini(9), cik_get_ih_wptr(9), cik_irq_process(9), cik_startup(9), cik_resume(9), cik_suspend(9), cik_init(9), cik_fini(9), dce8_line_buffer_adjust(9), cik_get_number_of_dram_channels(9), dce8_dram_bandwidth(9), dce8_dram_bandwidth_for_display(9), dce8_data_return_bandwidth(9), dce8_dmif_request_bandwidth(9), dce8_available_bandwidth(9), dce8_average_bandwidth(9), dce8_latency_watermark(9), dce8_average_bandwidth_vs_dram_bandwidth_for_display(9), dce8_average_bandwidth_vs_available_bandwidth(9), dce8_check_latency_hiding(9), dce8_program_watermarks(9), dce8_bandwidth_update(9), cik_get_gpu_clock_counter(9) 💀

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ngl that SEE ALSO list is giving "invited the whole group chat to the party" but we love her for it 🙈

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and that's the page!! 💖 this one came out of ./drivers/gpu/drm/radeon, version dated October 2026, and it's filed under cik_copy_cpdma(9) — slay, go read the source bestie 🧚‍♀️✨🍓