cayman_dma_get_wptr(9)

💖 cayman_dma_get_wptr 💖

okay so bestie, welcome to the cayman_dma_get_wptr(9) page — this one lives in the Kernel API Manual and honestly it's short, sweet, and does exactly what it says on the tin 🎀

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✨ NAME ✨

cayman_dma_get_wptr — get the current write pointer

like, that's it. that's the whole job. a little pointer-fetching moment 💅

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🌸 SYNOPSIS 🌸

uint32_t cayman_dma_get_wptr (struct radeon_device *rdev , struct
radeon_ring *ring );

so you call it, you hand it your stuff, and it gives you back a uint32_t. cute. functional. no notes ✨

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🦋 ARGUMENTS 🦋

• rdev — a radeon_device pointer 🫶 like, the whole device situation
• ring — a radeon_ring pointer 💍 the ring in question, obviously

two pointers in, a write pointer out. main character energy fr fr 👑

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💜 DESCRIPTION 💜

Get the current wptr from the hardware (cayman+).

ngl that's the entire description and it ate. no cap. it grabs the current write pointer straight from the hardware, and this is the cayman-and-later situation — so if you're on cayman+, this is your girl 💖

lowkey obsessed with how the hardware knows where the write pointer is and we just ask it. iconic.

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🌈 SEE ALSO 🌈

Kernel file ./drivers/gpu/drm/radeon/ni_dma.c — go read it, iykyk 📖 and also these besties right here:

• cayman_dma_get_rptr(9)
• cayman_dma_set_wptr(9)
• cayman_dma_ring_ib_execute(9)
• cayman_dma_stop(9)
• cayman_dma_resume(9)
• cayman_dma_fini(9)
• cayman_dma_is_lockup(9)
• cayman_dma_vm_copy_pages(9)
• cayman_dma_vm_write_pages(9)
• cayman_dma_vm_set_pages(9)
• cayman_dma_vm_pad_ib(9)

the whole radeon dma friend group honestly 😭💕

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and that's the page bestie!! 🍓 this one's from ./drivers/gpu/drm/radeon in the Kernel API Manual, dated October 2026, and it's titled cayman_dma_get_wptr(9) — mwah, go get that write pointer 🧚‍♀️💅✨