sdma_v4_0_pa...ing_get_wptr(9)
π sdma_v4_0_page_ring_get_wptr β the full rundown β¨
okay so bestie, you're looking at sdma_v4_0_page_ring_get_wptr(9) from the Kernel API Manual, and honestly? it's giving short-and-sweet icon energy. let's get into it π«Ά
πΈ NAME πΈ
sdma_v4_0_page_ring_get_wptr β literally just "get the current write pointer". that's the whole vibe. no cap, that's it π
β¨ SYNOPSIS β¨
uint64_t sdma_v4_0_page_ring_get_wptr (struct amdgpu_ring *ring );
so you call it, you hand it a ring, and it gives you back a uint64_t. clean. slay. π
π¦ ARGUMENTS π¦
ringβ an amdgpu ring pointer. that's your one (1) input, bestie. the whole function runs on this. π
π DESCRIPTION π
it gets the current wptr β the write pointer β straight from the hardware. and here's the tea: this is a VEGA10+ situation. so if your hardware is older than that, this function is not the main character for you, iykyk π
like, that's genuinely the entire description. the manpage said what it said and then dipped π short king behavior fr fr
π₯ SEE ALSO π₯
okay the see-also section is HUGE and honestly it ate. the kernel file you wanna peek at is:
./drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
and then the whole friend group of related functions, all (9) sections, all iconic in their own right π:
sdma_v4_0_init_microcode(9)sdma_v4_0_ring_get_rptr(9)sdma_v4_0_ring_get_wptr(9)sdma_v4_0_ring_set_wptr(9)sdma_v4_0_page_ring_set_wptr(9)sdma_v4_0_ring_emit_ib(9)sdma_v4_0_ring_emit_hdp_flush(9)sdma_v4_0_ring_emit_fence(9)sdma_v4_0_gfx_enable(9)sdma_v4_0_rlc_stop(9)sdma_v4_0_page_stop(9)sdma_v4_0_ctx_switch_enable(9)sdma_v4_0_enable(9)sdma_v4_0_gfx_resume(9)sdma_v4_0_page_resume(9)sdma_v4_0_rlc_resume(9)sdma_v4_0_load_microcode(9)sdma_v4_0_start(9)sdma_v4_0_ring_test_ring(9)sdma_v4_0_ring_test_ib(9)sdma_v4_0_vm_copy_pte(9)sdma_v4_0_vm_write_pte(9)sdma_v4_0_vm_set_pte_pde(9)sdma_v4_0_ring_pad_ib(9)sdma_v4_0_ring_emit_pipeline_sync(9)sdma_v4_0_ring_emit_vm_flush(9)sdma_v4_0_emit_copy_buffer(9)sdma_v4_0_emit_fill_buffer(9)
like look at that list. twenty-eight whole friends. the whole sdma_v4_0 squad showed up for this page π§π«
ngl this one's a tiny little getter, so don't go expecting drama. but every getter matters, bestie. the ring's not gonna read itself π
that's the whole page, no crumbs left π this one lives in ./drivers/gpu/drm/amd/amdgpu, dated October 2026, in the Kernel API Manual β and yeah, the footer literally spells the function name all truncated like sdma_v4_0_pa...ing_get_wptr(9) because even the manpage header needs its beauty filter. periodt. πβ¨π
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms