kernel/linux.git/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h, branch v6.19.11

drm/amdgpu: rework how isolation is enforced v2

2025-03-21T16:16:34+00:00

Limiting the number of available VMIDs to enforce isolation causes some issues with gang submit and applying certain HW workarounds which require multiple VMIDs to work correctly. So instead start to track all submissions to the relevant engines in a per partition data structure and use the dma_fences of the submissions to enforce isolation similar to what a VMID limit does. v2: use ~0l for jobs without isolation to distinct it from kernel submissions which uses NULL for the owner. Add some warning when we are OOM. Signed-off-by: Christian König Acked-by: Srinivasan Shanmugam Signed-off-by: Alex Deucher

drm/amdgpu: use GFP_NOWAIT for memory allocations

2025-03-21T16:15:08+00:00

In the critical submission path memory allocations can't wait for reclaim since that can potentially wait for submissions to finish. Finally clean that up and mark most memory allocations in the critical path with GFP_NOWAIT. The only exception left is the dma_fence_array() used when no VMID is available, but that will be cleaned up later on. Signed-off-by: Christian König Acked-by: Srinivasan Shanmugam Signed-off-by: Alex Deucher

drm/amdgpu: sync to KFD fences before clearing PTEs

2024-09-25T16:55:44+00:00

This patch tries to solve the basic problem we also need to sync to the KFD fences of the BO because otherwise it can be that we clear PTEs while the KFD queues are still running. Signed-off-by: Christian König Acked-by: Felix Kuehling Signed-off-by: Alex Deucher

drm/amdgpu: use scheduler dependencies for VM updates

2022-11-03T11:45:20+00:00

Instead of putting that into the job sync object. Signed-off-by: Christian König Reviewed-by: Luben Tuikov Link: https://patchwork.freedesktop.org/patch/msgid/20221014084641.128280-9-christian.koenig@amd.com

drm/amdgpu: rework TLB flushing

2022-03-25T16:40:51+00:00

Instead of tracking the VM updates through the dependencies just use a sequence counter for page table updates which indicates the need to flush the TLB. This reduces the need to flush the TLB drastically. v2: squash in NULL check fix (Christian) Signed-off-by: Christian König Acked-by: Felix Kuehling Signed-off-by: Alex Deucher

drm/amdgpu: simplify VM update tracking a bit

2022-03-25T16:40:26+00:00

Store the 64bit sequence directly. Makes it simpler to use and saves a bit of fence reference counting overhead. Signed-off-by: Christian König Acked-by: Felix Kuehling Signed-off-by: Alex Deucher

drm/amdgpu: remove distinction between explicit and implicit sync (v2)

2020-07-01T05:59:22+00:00

According to Marek a pipeline sync should be inserted for implicit syncs well. v2: bump the driver version Signed-off-by: Christian König Tested-by: Marek Olšák Signed-off-by: Marek Olšák Signed-off-by: Alex Deucher

drm/amdgpu: rework job synchronization v2

2020-02-05T04:30:39+00:00

For unlocked page table updates we need to be able to sync to fences of a specific VM. v2: use SYNC_ALWAYS in the UVD code Signed-off-by: Christian König Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher

drm/amdgpu: explicitely sync to VM updates v2

2019-12-09T22:02:07+00:00

Allows us to reduce the overhead while syncing to fences a bit. v2: also drop adev parameter from the functions Signed-off-by: Christian König Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher

dma-buf: rename reservation_object to dma_resv

2019-08-13T07:09:30+00:00

Be more consistent with the naming of the other DMA-buf objects. Signed-off-by: Christian König Reviewed-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/323401/