cik_scratch_init(9)

💅 cik_scratch_init — Kernel API Manual, but make it make sense ✨

okay so bestie, buckle up, because we're diving into cik_scratch_init(9) — yes the (9) means it's a kernel API page, iykyk 🎀

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🌸 NAME 🌸

cik_scratch_init — literally just setting up driver info for CP scratch regs, no biggie 💖

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🦋 SYNOPSIS 🦋

void cik_scratch_init (struct radeon_device *rdev );

that's the whole signature, she's simple and she knows it 💅

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✨ ARGUMENTS ✨

• rdev — a radeon_device pointer. that's it, that's the whole argument list, one (1) pointer, main character energy fr 🫶

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🌈 DESCRIPTION 🌈

So what does she actually do? She sets up the number and the offset of the CP scratch registers. that's the whole job. lowkey iconic for how unbothered it is 💀

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💀 NOTE 💀

okay important disclaimer time, pay attention bestie:

use of CP scratch registers is a legacy interface and is not used by default on newer asics (r6xx+). on newer asics, memory buffers are used for fences rather than scratch regs. so like... she's vintage. she's a throwback. respect her anyway 👑

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🧚 SEE ALSO 🧚

okay this list is LONG, like genuinely enormous, so I'm giving you every single one because I refuse to leave anyone out 💜

• Kernel file ./drivers/gpu/drm/radeon/cik.c
• 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_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_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. ENORMOUS. she's connected to everyone in the driver, fr fr 🌟

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and that's the page bestie!! 🎀 this little icon lives over in ./drivers/gpu/drm/radeon, and she was stamped October 2026 — go off, calendar queen 👑💜