amdgpu_ttm_clear_buffer(9)

💖 amdgpu_ttm_clear_buffer — like, the 9 kernel API manual page, bestie ✨

okay so picture this: you open the Kernel API Manual and there's this little function that just… fills a buffer with 0. that's it. that's the whole vibe. zeroes. nada. the void. and honestly? iconic. 🫶

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✨ NAME ✨

amdgpu_ttm_clear_buffer — fill a buffer with 0

like literally just zero it out, no cap 🎀

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🌸 SYNOPSIS 🌸

int amdgpu_ttm_clear_buffer (struct amdgpu_ttm_buffer_entity *entity ,
struct amdgpu_bo *bo , struct dma_resv *resv , struct dma_fence
**out_fence , bool consider_clear_status , u64 k_job_id );

she takes six whole arguments and returns an int, main character energy fr fr 👑

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🦋 ARGUMENTS 🦋

okay bestie let's go through each one, don't skip, i will know:

• entity — entity to use. that's the one. the entity. she's the setup 💅
• bo — the bo to fill. this is the buffer object getting absolutely zeroed, she's the canvas 🎨
• resv — fences contained in this reservation will be used as dependencies. so like, everything in here has to finish first before we go, iykyk ⏳
• out_fence — the fence from the last clear will be stored here. and — important — it might be NULL if no job was run. so check before you dereference, bestie, please 😭
• consider_clear_status — true if region reported as cleared by amdgpu_res_cleared are skipped. lowkey a little optimization flag 🌈
• k_job_id — trace id. just a lil id for tracing, so the logs can find her later 🔍

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💜 SEE ALSO 💜

first up, the actual kernel file if you wanna read the source (respect):

• Kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

and then the whole friend group, the entire ttm squad, all of them, in order:

• amdgpu_evict_flags(9)
• amdgpu_ttm_map_buffer(9)
• amdgpu_ttm_copy_mem_to_mem(9)
• amdgpu_res_cpu_visible(9)
• amdgpu_ttm_domain_start(9)
• amdgpu_ttm_mmio_remap_alloc_sgt(9)
• amdgpu_ttm_tt_create(9)
• amdgpu_ttm_tt_get_userptr(9)
• amdgpu_ttm_tt_set_userptr(9)
• amdgpu_ttm_tt_pde_flags(9)
• amdgpu_ttm_tt_pte_flags(9)
• amdgpu_ttm_access_memory(9)
• amdgpu_ttm_training_reserve_vram_fini(9)
• amdgpu_ttm_alloc_mmio_remap_bo(9)
• amdgpu_ttm_free_mmio_remap_bo(9)
• amdgpu_ttm_enable_buffer_funcs(9)
• amdgpu_ttm_disable_buffer_funcs(9)
• amdgpu_ttm_evict_resources(9)

bestie that's nineteen siblings and every single one of them ate 💀🔥

ngl the (9) on every single one just means "this is a kernel API page", it's giving matching friendship bracelets 🎀

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okay that's the whole page!! mwah 💋 this one came from ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and the manual is amdgpu_ttm_clear_buffer(9) under the Kernel API Manual — love her, zero her, periodt 💅✨