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From 38cc13ce129ab201aa74dc39edf5f46d43635bf3 Mon Sep 17 00:00:00 2001
From: Chunming Zhou <David1.Zhou@amd.com>
Date: Thu, 14 Apr 2016 13:42:32 +0800
Subject: [PATCH 0506/1110] drm/amdgpu: only update last_flush when vmid
doesn't have other new owner
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Kalyan Alle <kalyan.alle@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 15 ++++++++++-----
2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 95ea8d7..0214003 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -880,6 +880,7 @@ struct amdgpu_vm_id {
struct fence *first;
struct amdgpu_sync active;
struct fence *last_flush;
+ struct amdgpu_ring *last_user;
atomic_long_t owner;
uint64_t pd_gpu_addr;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 9444cbe..4a896d7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -267,6 +267,7 @@ int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
id->pd_gpu_addr = pd_addr;
list_move_tail(&id->list, &adev->vm_manager.ids_lru);
+ id->last_user = ring;
atomic_long_set(&id->owner, (long)vm);
vm->ids[ring->idx] = id;
@@ -314,13 +315,17 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring,
trace_amdgpu_vm_flush(pd_addr, ring->idx, vm_id);
amdgpu_ring_emit_vm_flush(ring, vm_id, pd_addr);
- r = amdgpu_fence_emit(ring, &fence);
- if (r)
- return r;
mutex_lock(&adev->vm_manager.lock);
- fence_put(id->last_flush);
- id->last_flush = fence;
+ if ((id->pd_gpu_addr == pd_addr) && (id->last_user == ring)) {
+ r = amdgpu_fence_emit(ring, &fence);
+ if (r) {
+ mutex_unlock(&adev->vm_manager.lock);
+ return r;
+ }
+ fence_put(id->last_flush);
+ id->last_flush = fence;
+ }
mutex_unlock(&adev->vm_manager.lock);
}
--
2.7.4
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