cik_startup(9)

cik_startup(9) 💖✨

Okay bestie, so this is from the Kernel API Manual — and it's literally the glow-up function for your GPU. Let me spill the tea. 🫖

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🎀 NAME 🎀

cik_startup — program the asic to a functional state

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✨ SYNOPSIS ✨

int cik_startup (struct radeon_device *rdev );

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🌸 ARGUMENTS 🌸

• rdev — radeon_device pointer. It's giving "the whole GPU device object" energy, and you're handing it over so the function knows what to work on. 💅

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🦋 DESCRIPTION 🦋

So like, this function programs the asic to a functional state (CIK). Think of it as the main character moment where the hardware gets its life together. 👑

It's called by cik_init and cik_resume — so it's the go-to glow-up routine whenever things are starting up or waking back up. 🌈

It returns 0 for success, and an error for failure. No cap. ✅

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💜 SEE ALSO 💜

The kernel file ./drivers/gpu/drm/radeon/cik.c is the source of truth, and honestly there are so many related functions it's giving "entire friend group." Here's the full squad, no gatekeeping:

• 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_copy_cpdma(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_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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Honestly iconic how many friends this one function has. Slay. 💅✨

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And that's the tea, bestie — this page is from ./drivers/gpu/drm/radeon and was dated October 2026. Stay slaying those kernels. 🎀🔥🫶