ih_v7_0_get_wptr(9)

💅 ih_v7_0_get_wptr(9) — like, the Kernel API Manual page you've been waiting for ✨

okay so bestie, welcome to the Kernel API Manual entry for ih_v7_0_get_wptr(9) — it's giving "tiny function, big responsibility" and honestly? we're obsessed. 🎀

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🌸 NAME

ih_v7_0_get_wptr — get the IH ring buffer wptr 🦋

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⭐ SYNOPSIS

u32 ih_v7_0_get_wptr (struct amdgpu_device *adev , struct amdgpu_ih_ring
*ih );

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💜 ARGUMENTS

• adev — an amdgpu_device pointer, aka the main character of this whole GPU situation 👑
• ih — the IH ring buffer we're fetching the wptr from, no cap 🫶

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✨ DESCRIPTION

okay so here's the tea 🍓 — this function gets the IH ring buffer wptr from either the register or the writeback memory buffer. Either one. It's flexible like that, we love a versatile icon.

It also does a vibe check on the ring buffer for overflow, and like, deals with it. 🔥 Not me handling overflow AND fetching wptr in the same function, main character energy fr fr.

Returns the value of the wptr. periodt. 💅

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🌈 SEE ALSO

Kernel file ./drivers/gpu/drm/amd/amdgpu/ih_v7_0.c — go read it, iykyk 💀

• ih_v7_0_init_register_offset(9)
• force_update_wptr_for_self_int(9)
• ih_v7_0_toggle_ring_interrupts(9)
• ih_v7_0_toggle_interrupts(9)
• ih_v7_0_enable_ring(9)
• ih_v7_0_irq_init(9)
• ih_v7_0_irq_disable(9)
• ih_v7_0_irq_rearm(9)
• ih_v7_0_set_rptr(9)
• ih_v7_0_self_irq(9)

literally the whole friend group 😭🫶

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ngl bestie, if you're deep in drivers/gpu/drm/amd/amdgpu at 3am, drink some water and remember: the wptr is coming from the register or the writeback memory buffer. that's it. that's the whole thing. slay. 💖

and that's a wrap! brought to you by ./drivers/gpu/drm/amd/amdgpu, dated October 2026, filed under ih_v7_0_get_wptr(9) — mwah, go touch some grass (after you check for ring buffer overflow) 🌸🧚⭐