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| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2018-02-07 04:32:35 +0300 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2018-02-07 04:32:35 +0300 |
| commit | d8d019ccffb838bb0dd98e583b5c25ccc0bc6ece (patch) | |
| tree | 660d1ea42b915579fc4b12ad717bcbcaf49254f6 /drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c | |
| parent | 1029a3f33678afb8978285209ec5cfe153fe44ef (diff) | |
| download | linux-d8d019ccffb838bb0dd98e583b5c25ccc0bc6ece.tar.xz | |
drm/amdgpu: Add KFD eviction fence
This fence is used by KFD to keep memory resident while user mode
queues are enabled. Trying to evict memory will trigger the
enable_signaling callback, which starts a KFD eviction, which
involves preempting user mode queues before signaling the fence.
There is one such fence per process.
v2:
* Grab a reference to mm_struct
* Dereference fence after NULL check
* Simplify fence release, no need to signal without anyone waiting
* Added signed-off-by Harish, who is the original author of this code
v3:
* update MAINTAINERS file
* change amd_kfd_ prefix to amdkfd_
* remove useless initialization of variable to NULL
v4:
* set amdkfd_fence_ops to be static
* Suggested by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c index df65c66dc956..b8d3b87fd43e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c @@ -31,6 +31,7 @@ #include <drm/drmP.h> #include "amdgpu.h" #include "amdgpu_trace.h" +#include "amdgpu_amdkfd.h" struct amdgpu_sync_entry { struct hlist_node node; @@ -85,11 +86,20 @@ static bool amdgpu_sync_same_dev(struct amdgpu_device *adev, */ static void *amdgpu_sync_get_owner(struct dma_fence *f) { - struct drm_sched_fence *s_fence = to_drm_sched_fence(f); + struct drm_sched_fence *s_fence; + struct amdgpu_amdkfd_fence *kfd_fence; + + if (!f) + return AMDGPU_FENCE_OWNER_UNDEFINED; + s_fence = to_drm_sched_fence(f); if (s_fence) return s_fence->owner; + kfd_fence = to_amdgpu_amdkfd_fence(f); + if (kfd_fence) + return AMDGPU_FENCE_OWNER_KFD; + return AMDGPU_FENCE_OWNER_UNDEFINED; } @@ -204,11 +214,18 @@ int amdgpu_sync_resv(struct amdgpu_device *adev, for (i = 0; i < flist->shared_count; ++i) { f = rcu_dereference_protected(flist->shared[i], reservation_object_held(resv)); + /* We only want to trigger KFD eviction fences on + * evict or move jobs. Skip KFD fences otherwise. + */ + fence_owner = amdgpu_sync_get_owner(f); + if (fence_owner == AMDGPU_FENCE_OWNER_KFD && + owner != AMDGPU_FENCE_OWNER_UNDEFINED) + continue; + if (amdgpu_sync_same_dev(adev, f)) { /* VM updates are only interesting * for other VM updates and moves. */ - fence_owner = amdgpu_sync_get_owner(f); if ((owner != AMDGPU_FENCE_OWNER_UNDEFINED) && (fence_owner != AMDGPU_FENCE_OWNER_UNDEFINED) && ((owner == AMDGPU_FENCE_OWNER_VM) != |