amdgpu_gfx_csb_preamble_end(9)

💫 amdgpu_gfx_csb_preamble_end(9) 💫

okay so bestie, welcome to the Kernel API Manual — today's main character is amdgpu_gfx_csb_preamble_end, and honestly? she's a tiny little function with one job and she does it. no cap. 🎀

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✨ NAME ✨

amdgpu_gfx_csb_preamble_end — literally just here to set the CSB preamble end 💅

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🌸 SYNOPSIS 🌸

void amdgpu_gfx_csb_preamble_end (u32 *buffer , u32 count );

that's it. that's the whole vibe check. 🦋

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🧚 ARGUMENTS 🧚

• buffer — this one's an output variable, okay? it's where the PACKET3 preamble end gets dropped off. she receives, she doesn't give. 💖
• count — the index where the settin' of the preemble end starts. yeah that's the spot, that's where it begins. 📍

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👑 SEE ALSO 👑

the whole friend group, fr fr — starting with the kernel file herself:

• Kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
• amdgpu_gfx_parse_disable_cu(9)
• amdgpu_gfx_handle_priv_fault(9)
• amdgpu_gfx_set_run_cleaner_shader(9)
• amdgpu_gfx_get_enforce_isolation(9)
• amdgpu_gfx_set_enforce_isolation(9)
• amdgpu_gfx_kfd_sch_ctrl(9)
• amdgpu_gfx_enforce_isolation_handler(9)
• amdgpu_gfx_enforce_isolation_wait_for_kfd(9)
• amdgpu_gfx_enforce_isolation_ring_begin_use(9)
• amdgpu_gfx_enforce_isolation_ring_end_use(9)
• amdgpu_gfx_csb_preamble_start(9)
• amdgpu_gfx_csb_data_parser(9)

like, go read them too?? they're all eating and leaving no crumbs. 🔥

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💀 reminder bestie: buffer is an output variable, so don't go treating it like an input and then act surprised. the count is an index — it's where the setting of the preemble end kicks off. iykyk. 🫶

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mwah 💋 that's the whole page, and it lives in ./drivers/gpu/drm/amd/amdgpu, dated October 2026, straight from the amdgpu_gfx_csb_preamble_end(9) manual. slay, go forth and set those preamble ends. 🌈⭐🍓