cik_ib_test(9)

💅 cik_ib_test — the Kernel API Manual era 🎀

okay so bestie, we're in the cik_ib_test(9) section of the Kernel API Manual today and honestly? it's a little guy with a big job. let's get into it ✨

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🌸 NAME 🌸

cik_ib_test — literally just a basic gfx ring IB test, no cap 🫶

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🦋 SYNOPSIS 🦋

int cik_ib_test (struct radeon_device *rdev , struct radeon_ring *ring
);

yes the formatting is a little chaotic, she's built different 💅

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✨ ARGUMENTS ✨

• rdev — a radeon_device pointer. that's the device bestie, the whole vibe 🌈
• ring — a radeon_ring structure holding ring information. she's holding the ring info, she's the main character 👑

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🔥 DESCRIPTION 🔥

so what does she do? she allocates an IB and executes it on the gfx ring (CIK). that's it. that's the whole personality 🎀

it's giving basic gfx ring test — the entire point is to verify that IBs are actually working, iykyk 💀

and the returns? iconic behaviour honestly:

• returns 0 on success ⭐
• returns error on failure 😭

periodt. no extra lore, she's very straightforward about it 🫶

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👑 SEE ALSO 👑

first up, the kernel file she lives in:

• ./drivers/gpu/drm/radeon/cik.c

and then, bestie, the friend group is massive, I'm not even kidding, buckle up 🎀:

• 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_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)

like I said. huge friend group. she knows everybody 🧚

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and that's the whole page, bestie 💖 this one came from ./drivers/gpu/drm/radeon, dated October 2026 — catch you on the next one, mwah 🎀💅