cik_vm_decode_fault(9)

💅 cik_vm_decode_fault(9) — kernel API manual realness

okay bestie, so this page is literally the cik_vm_decode_fault(9) kernel API manual, and it's the whole entire vibe for one tiny little function that makes GPU boo-boos actually readable. 🎀

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✨ NAME ✨

cik_vm_decode_fault — print human readable fault info 😭💖

like, it takes the scary hex numbers and turns them into words a human can actually read. iconic behavior fr fr.

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🌸 SYNOPSIS 🌸

void cik_vm_decode_fault (struct radeon_device *rdev , u32 status , u32 addr , u32 mc_client );

that's it. that's the whole signature. four args, returns void, no cap. 🫶

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🦋 ARGUMENTS 🦋

okay so here's the rundown of what you're feeding it, keep up:

• rdev — a radeon_device pointer. yes bestie, the radeon device. that's your main character. 👑
• status — the value of the VM_CONTEXT1_PROTECTION_FAULT_STATUS register. this is the gossip, the lore, the what actually happened. ⭐
• addr — the value of the VM_CONTEXT1_PROTECTION_FAULT_ADDR register. the address where the whole mess went down. 📍
• mc_client — the value of the VM_CONTEXT1_PROTECTION_FAULT_MCCLIENT register. which client. who did this. we WILL be finding out. 💀

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💜 DESCRIPTION 💜

It prints human readable fault information (CIK).

that's the whole thing. so unbothered, so concise, so real. it takes a fault and makes it make sense — like a translator but for GPU suffering. ✨

ngl the description is short because the function's whole job is literally "make the fault info readable". no extra plot, just vibes and output. 🧚

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🔥 SEE ALSO 🔥

First up, the birthplace of all this: the kernel file ./drivers/gpu/drm/radeon/cik.c — go read the source bestie, it's all in there. 🍓

And now the iconic lineup, every single one of these reference cuties, in order, no skips:

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_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… that's a whole friend group right there. iykyk 💅

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🌈 sign-off 🌈

so yeah, this page lives in ./drivers/gpu/drm/radeon, and it's dated October 2026 — future-coded of it honestly. go forth and decode those faults, bestie. you've got this. 💖✨🦋