tonga_ih_get_wptr(9)

💖 tonga_ih_get_wptr 💖

okay so bestie, welcome to the tonga_ih_get_wptr(9) page — yes that's the kernel API manual, and yes we're gonna get through it together 🫶

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✨ NAME ✨

tonga_ih_get_wptr — literally just, get the IH ring buffer wptr. that's the whole gig 💅

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🦋 SYNOPSIS 🦋

u32 tonga_ih_get_wptr (struct amdgpu_device *adev , struct
amdgpu_ih_ring *ih );

like, it hands you back a u32 and takes two pointers, no big deal ✨

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🌸 ARGUMENTS 🌸

• adev — an amdgpu_device pointer. yep, the classic. it's the device, she's the main character 👑
• ih — the IH ring buffer we're fetching the wptr from. that's the one, that's our girl 🎀

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💜 DESCRIPTION 💜

so what does she actually do, you ask? slay, glad you asked 💖

She gets the IH ring buffer wptr — and ngl, she's flexible about it: she pulls it from either the register or the writeback memory buffer (VI). iykyk. ✨

She also checks for ring buffer overflow and deals with it. like, not me being responsible?? we love a function that handles her own problems 😭🔥

Oh and she's used by cz_irq_process(VI). periodt.

And the payoff: she returns the value of the wptr. that's it, that's the return value, iconic behavior 💅

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/amd/amdgpu/tonga_ih.c — go read the source bestie, it's giving lore 📖
• tonga_ih_enable_interrupts(9)
• tonga_ih_disable_interrupts(9)
• tonga_ih_irq_init(9)
• tonga_ih_irq_disable(9)
• tonga_ih_decode_iv(9)
• tonga_ih_set_rptr(9)

the whole tonga_ih friend group fr fr, go say hi to all of them 🧚💜

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lowkey reminder: this is kernel API stuff, so treat the pointers with respect — no cap, don't be passing her nonsense 🙈

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and that's the page!! brought to you by ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and this whole messy little love letter is tonga_ih_get_wptr(9) 🍓💖 bye bestie, go read some more manpages, mwah 🎀