cz_ih_decode_iv(9)

💅 cz_ih_decode_iv — bestie, let's decode an interrupt vector

okay so this is a page from the Kernel API Manual (yes, the kernel has lore too) and it's all about cz_ih_decode_iv, which is literally the function that decodes an interrupt vector. that's the whole vibe. let's get into it 🫶

---

✨ SYNOPSIS ✨

void cz_ih_decode_iv (struct amdgpu_device *adev , struct amdgpu_ih_ring
*ih , struct amdgpu_iv_entry *entry );

three pointers in, void out. she takes what she takes and returns absolutely nothing, which is honestly such a mood 😭 no cap.

---

🎀 ARGUMENTS 🎀

• adev — an amdgpu_device pointer. like, the device in question. she needs to know which GPU we're talking about, obvi 💖
• ih — the IH ring buffer to decode. this is the ring we're poking at, and it's an amdgpu_ih_ring *
• entry — the IV entry where the decoded info gets placed. it's an amdgpu_iv_entry *, and it's basically the lil container that comes out the other end stuffed with decoded goodness ✨

---

🌸 DESCRIPTION 🌸

so what does she actually do? she decodes the interrupt vector sitting at the current rptr position — and while she's at it, she also advances that position. two things, one function, main character energy fr fr 👑

lowkey iconic. it's giving "i'll read it and move the pointer, you're welcome."

---

🦋 SEE ALSO 🦋

• kernel file: ./drivers/gpu/drm/amd/amdgpu/cz_ih.c
• cz_ih_enable_interrupts(9)
• cz_ih_disable_interrupts(9)
• cz_ih_irq_init(9)
• cz_ih_irq_disable(9)
• cz_ih_get_wptr(9)
• cz_ih_set_rptr(9)

like yeah bestie, go read the whole friend group, they're all in the same file iykyk 💜

---

ngl this one's short and sweet — but if you mess with the ring positions without knowing what you're doing, that's on you, not on me 🙈

---

and that's the tea 🍓 this page lives in ./drivers/gpu/drm/amd/amdgpu, dated October 2026. go forth and decode, bestie — slay 💅🌈