amdgpu_vm_generation(9)

💅 amdgpu_vm_generation — return the page table re-generation counter

okay so bestie, this one is amdgpu_vm_generation(9) from the Kernel API Manual, and honestly? it's giving tiny function, huge responsibility. she's one little return value and she's carrying the whole "is your submission still valid" question on her back. iconic behavior tbh 🎀

---

✨ NAME ✨

amdgpu_vm_generation — return the page table re-generation counter 💫

---

🌸 SYNOPSIS 🌸

uint64_t amdgpu_vm_generation (struct amdgpu_device *adev , struct
amdgpu_vm *vm );

---

🦋 ARGUMENTS 🦋

• adev — the amdgpu_device. your actual GPU situation, the main character of the whole amdgpu saga 🔥
• vm — optional VM to check, and yes she might be NULL. lowercase legend behavior ngl 🙈

---

💖 DESCRIPTION 💖

okay so what she does: returns a page table re-generation token — think of it like a vibe check receipt 🧾 — and it lets you check whether submissions are still valid to use this VM. like, is this mapping still the map, or did the page tables regenerate and ghost you? 😭

and here's the little plot twist: the vm parameter might be NULL, in which case just the VRAM lost counter will be used. no VM? no problem, she still has receipts to hand out. periodt 💅

---

🔥 SEE ALSO 🔥

Kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c — that's where the source lives, go say hi 🫶

and now, the whole squad, in order, no gatekeeping, no skipping, every single one of them:

GPUVM(9), struct amdgpu_prt_cb(9), struct amdgpu_vm_tlb_seq_struct(9), amdgpu_vm_assert_locked(9), amdgpu_vm_is_bo_always_valid(9), amdgpu_vm_bo_evicted(9), amdgpu_vm_bo_needs_update(9), amdgpu_vm_bo_idle(9), amdgpu_vm_bo_reset_state_machine(9), amdgpu_vm_update_shared(9), amdgpu_vm_bo_update_shared(9), amdgpu_vm_update_stats_locked(9), amdgpu_vm_update_stats(9), amdgpu_vm_bo_base_init(9), amdgpu_vm_lock_pd(9), amdgpu_vm_lock_individual(9), amdgpu_vm_move_to_lru_tail(9), amdgpu_vm_validate(9), amdgpu_vm_ready(9), amdgpu_vm_check_compute_bug(9), amdgpu_vm_need_pipeline_sync(9), amdgpu_vm_flush(9), amdgpu_vm_bo_find(9), amdgpu_vm_map_gart(9), amdgpu_vm_update_pdes(9), amdgpu_vm_tlb_seq_cb(9), amdgpu_vm_tlb_flush(9), amdgpu_vm_update_range(9), amdgpu_vm_bo_update(9), amdgpu_vm_update_prt_state(9), amdgpu_vm_prt_get(9), amdgpu_vm_prt_put(9), amdgpu_vm_prt_cb(9), amdgpu_vm_add_prt_cb(9), amdgpu_vm_free_mapping(9), amdgpu_vm_prt_fini(9), amdgpu_vm_clear_freed(9), amdgpu_vm_handle_moved(9), amdgpu_vm_flush_compute_tlb(9), amdgpu_vm_bo_add(9), amdgpu_vm_bo_insert_map(9), amdgpu_vm_bo_map(9), amdgpu_vm_bo_replace_map(9), amdgpu_vm_bo_unmap(9), amdgpu_vm_bo_clear_mappings(9), amdgpu_vm_bo_lookup_mapping(9), amdgpu_vm_bo_trace_cs(9), amdgpu_vm_bo_del(9), amdgpu_vm_evictable(9), amdgpu_vm_bo_invalidate(9), amdgpu_vm_bo_move(9), amdgpu_vm_get_block_size(9), amdgpu_vm_adjust_size(9), amdgpu_vm_wait_idle(9), amdgpu_vm_put_task_info(9), amdgpu_vm_get_task_info_vm(9), amdgpu_vm_get_task_info_pasid(9), amdgpu_vm_set_task_info(9), amdgpu_vm_init(9), amdgpu_vm_make_compute(9), amdgpu_vm_fini(9), amdgpu_vm_manager_init(9), amdgpu_vm_manager_fini(9), amdgpu_vm_ioctl(9), amdgpu_vm_lock_by_pasid(9), amdgpu_vm_handle_fault(9), amdgpu_debugfs_vm_bo_info(9), amdgpu_vm_update_fault_cache(9)

like… the way that list just keeps going?? she has friends, okay 💀💜

---

ngl bestie, the vm arg being allowed to be NULL is the detail to remember — that's the whole "just the VRAM lost counter" fallback situation, so don't assume you always have a VM in hand 🙈

---

that's the whole page, mwah 🎀 source/version is ./drivers/gpu/drm/amd/amdgpu and the date on this baddie is October 2026 — go forth and validate those submissions, ily, bye 💖✨🦋