kernel/linux.git/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h, branch v6.12.80

drm/amdgpu: Unlocked unmap only clear page table leaves

2025-04-20T08:15:23+00:00

[ Upstream commit 23b645231eeffdaf44021debac881d2f26824150 ] SVM migration unmap pages from GPU and then update mapping to GPU to recover page fault. Currently unmap clears the PDE entry for range length >= huge page and free PTB bo, update mapping to alloc new PT bo. There is race bug that the freed entry bo maybe still on the pt_free list, reused when updating mapping and then freed, leave invalid PDE entry and cause GPU page fault. By setting the update to clear only one PDE entry or clear PTB, to avoid unmap to free PTE bo. This fixes the race bug and improve the unmap and map to GPU performance. Update mapping to huge page will still free the PTB bo. With this change, the vm->pt_freed list and work is not needed. Add WARN_ON(unlocked) in amdgpu_vm_pt_free_dfs to catch if unmap to free the PTB. Signed-off-by: Philip Yang Reviewed-by: Christian König Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amdgpu: re-work VM syncing

2024-09-06T21:36:24+00:00

Rework how VM operations synchronize to submissions. Provide an amdgpu_sync container to the backends instead of an reservation object and fill in the amdgpu_sync object in the higher layers of the code. No intended functional change, just prepares for upcomming changes. Signed-off-by: Christian König Reviewed-by: Friedrich Vock Acked-by: Felix Kuehling Signed-off-by: Alex Deucher

drm/amdkfd: Change kfd/svm page fault drain handling

2024-08-23T14:55:13+00:00

When app unmap vm ranges(munmap) kfd/svm starts drain pending page fault and not handle any incoming pages fault of this process until a deferred work item got executed by default system wq. The time period of "not handle page fault" can be long and is unpredicable. That is advese to kfd performance on page faults recovery. This patch uses time stamp of incoming page fault to decide to drop or recover page fault. When app unmap vm ranges kfd records each gpu device's ih ring current time stamp. These time stamps are used at kfd page fault recovery routine. Any page fault happened on unmapped ranges after unmap events is application bug that accesses vm range after unmap. It is not driver work to cover that. By using time stamp of page fault do not need drain page faults at deferred work. So, the time period that kfd does not handle page faults is reduced and can be controlled. Signed-off-by: Xiaogang.Chen Reviewed-by: Philip Yang Signed-off-by: Alex Deucher

drm/amdgpu: add additional VM bits

2024-06-14T19:20:56+00:00

Add additional VM PTE bits. Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amdgpu: Update the impelmentation of AMDGPU_PTE_MTYPE_VG10

2024-06-05T15:25:13+00:00

This patch changes the implementation of AMDGPU_PTE_MTYPE_VG10, clear the bits before setting the new one. Suggested-by: Alex Deucher Signed-off-by: longlyao Signed-off-by: Shane Xiao Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher

drm/amdgpu: Update the impelmentation of AMDGPU_PTE_MTYPE_NV10

2024-06-05T15:02:43+00:00

This patch changes the implementation of AMDGPU_PTE_MTYPE_NV10, clear the bits before setting the new one. Suggested-by: Alex Deucher Signed-off-by: longlyao Signed-off-by: Shane Xiao Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher

drm/amdgpu: Update the impelmentation of AMDGPU_PTE_MTYPE_GFX12

2024-06-05T14:57:24+00:00

This patch changes the implementation of AMDGPU_PTE_MTYPE_GFX12, clear the bits before setting the new one. This fixed the potential issue that GFX12 setting memory to NC. v2: Clear mtype field before setting the new one (Alex) v3: Fix typo (Felix) Suggested-by: Alex Deucher Signed-off-by: longlyao Signed-off-by: Shane Xiao Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher

drm/amdgpu: Add amdgpu_bo_is_vm_bo helper

2024-05-17T21:40:38+00:00

Help code readability by replacing a bunch of: bo->tbo.base.resv == vm->root.bo->tbo.base.resv With: amdgpu_vm_is_bo_always_valid(vm, bo) No functional changes. v2: * Rename helper and move to amdgpu_vm. (Christian) v3: * Use Christian's kerneldoc. v4: * Fixed logic inversion in amdgpu_vm_bo_get_memory. Signed-off-by: Tvrtko Ursulin Cc: Christian König Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/amdgpu: support gfx v12 specific pte/pde fields

2024-04-30T14:01:01+00:00

Add gfx v12 pte/pde support to gmc common helper. v2: squash in fixes (Alex) Signed-off-by: Hawking Zhang Reviewed-by: Likun Gao Signed-off-by: Alex Deucher

drm/amdgpu: Add gfx v12 pte/pde format change

2024-04-30T14:00:35+00:00

Add gfx v12 pte/pde format change. Signed-off-by: Hawking Zhang Reviewed-by: Likun Gao Signed-off-by: Alex Deucher