diff options
| author | Christian König <christian.koenig@amd.com> | 2025-10-29 15:36:32 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-11-14 11:27:46 -0500 |
| commit | 20459c098d688971237e56e30263ddce467c8c9b (patch) | |
| tree | 1245f4d9412bfa1199e7680a676648b9626324c3 /drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | |
| parent | f8bdb559c01e8291f1862ee9ab4a7eb13d6d62ac (diff) | |
drm/amdgpu: avoid memory allocation in the critical code path v3
When we run out of VMIDs we need to wait for some to become available.
Previously we were using a dma_fence_array for that, but this means that
we have to allocate memory.
Instead just wait for the first not signaled fence from the least recently
used VMID to signal. That is not as efficient since we end up in this
function multiple times again, but allocating memory can easily fail or
deadlock if we have to wait for memory to become available.
v2: remove now unused VM manager fields
v3: fix dma_fence reference
Signed-off-by: Christian König <christian.koenig@amd.com>
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4258
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h index cf0ec94e8a07..15d757c016cb 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h @@ -453,10 +453,6 @@ struct amdgpu_vm_manager { unsigned int first_kfd_vmid; bool concurrent_flush; - /* Handling of VM fences */ - u64 fence_context; - unsigned seqno[AMDGPU_MAX_RINGS]; - uint64_t max_pfn; uint32_t num_level; uint32_t block_size; |