[PATCH 26/35] drm/amdkfd: add svm_bo reference for eviction fence

[Felix Kuehling]

From: Alex Sierra <alex.sierra at amd.com>

[why]
As part of the SVM functionality, the eviction mechanism used for
SVM_BOs is different. This mechanism uses one eviction fence per prange,
instead of one fence per kfd_process.

[how]
A svm_bo reference to amdgpu_amdkfd_fence to allow differentiate between
SVM_BO or regular BO evictions. This also include modifications to set the
reference at the fence creation call.

Signed-off-by: Alex Sierra <alex.sierra at amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h       | 4 +++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c | 5 +++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 6 ++++--
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
index bc9f0e42e0a2..fb8be788ac1b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
@@ -75,6 +75,7 @@ struct amdgpu_amdkfd_fence {
 	struct mm_struct *mm;
 	spinlock_t lock;
 	char timeline_name[TASK_COMM_LEN];
+	struct svm_range_bo *svm_bo;
 };
 
 struct amdgpu_kfd_dev {
@@ -95,7 +96,8 @@ enum kgd_engine_type {
 };
 
 struct amdgpu_amdkfd_fence *amdgpu_amdkfd_fence_create(u64 context,
-						       struct mm_struct *mm);
+					struct mm_struct *mm,
+					struct svm_range_bo *svm_bo);
 bool amdkfd_fence_check_mm(struct dma_fence *f, struct mm_struct *mm);
 struct amdgpu_amdkfd_fence *to_amdgpu_amdkfd_fence(struct dma_fence *f);
 int amdgpu_amdkfd_remove_fence_on_pt_pd_bos(struct amdgpu_bo *bo);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c
index 3107b9575929..9cc85efa4ed5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c
@@ -60,7 +60,8 @@ static atomic_t fence_seq = ATOMIC_INIT(0);
  */
 
 struct amdgpu_amdkfd_fence *amdgpu_amdkfd_fence_create(u64 context,
-						       struct mm_struct *mm)
+				struct mm_struct *mm,
+				struct svm_range_bo *svm_bo)
 {
 	struct amdgpu_amdkfd_fence *fence;
 
@@ -73,7 +74,7 @@ struct amdgpu_amdkfd_fence *amdgpu_amdkfd_fence_create(u64 context,
 	fence->mm = mm;
 	get_task_comm(fence->timeline_name, current);
 	spin_lock_init(&fence->lock);
-
+	fence->svm_bo = svm_bo;
 	dma_fence_init(&fence->base, &amdkfd_fence_ops, &fence->lock,
 		   context, atomic_inc_return(&fence_seq));
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 99ad4e1d0896..8a43f3880022 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -928,7 +928,8 @@ static int init_kfd_vm(struct amdgpu_vm *vm, void **process_info,
 
 		info->eviction_fence =
 			amdgpu_amdkfd_fence_create(dma_fence_context_alloc(1),
-						   current->mm);
+						   current->mm,
+						   NULL);
 		if (!info->eviction_fence) {
 			pr_err("Failed to create eviction fence\n");
 			ret = -ENOMEM;
@@ -2150,7 +2151,8 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef)
 	 */
 	new_fence = amdgpu_amdkfd_fence_create(
 				process_info->eviction_fence->base.context,
-				process_info->eviction_fence->mm);
+				process_info->eviction_fence->mm,
+				NULL);
 	if (!new_fence) {
 		pr_err("Failed to create eviction fence\n");
 		ret = -ENOMEM;
-- 
2.29.2