drm/amdgpu: add mutex for ba_va->valids/invalids

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 306f757..50672bb 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -496,6 +496,7 @@ struct amdgpu_bo_va_mapping {
 
 /* bo virtual addresses in a specific vm */
 struct amdgpu_bo_va {
+       struct mutex                    mutex;
        /* protected by bo being reserved */
        struct list_head                bo_list;
        struct fence                    *last_pt_update;

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 159ce54..d6904ef 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -922,8 +922,9 @@ int amdgpu_vm_clear_invalids(struct amdgpu_device *adev,
                bo_va = list_first_entry(&vm->invalidated,
                        struct amdgpu_bo_va, vm_status);
                spin_unlock(&vm->status_lock);
-
+               mutex_lock(&bo_va->mutex);
                r = amdgpu_vm_bo_update(adev, bo_va, NULL);
+               mutex_unlock(&bo_va->mutex);
                if (r)
                        return r;
 
@@ -967,7 +968,7 @@ struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
        INIT_LIST_HEAD(&bo_va->valids);
        INIT_LIST_HEAD(&bo_va->invalids);
        INIT_LIST_HEAD(&bo_va->vm_status);
-
+       mutex_init(&bo_va->mutex);
        list_add_tail(&bo_va->bo_list, &bo->va);
 
        return bo_va;
@@ -1045,7 +1046,9 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
        mapping->offset = offset;
        mapping->flags = flags;
 
+       mutex_lock(&bo_va->mutex);
        list_add(&mapping->list, &bo_va->invalids);
+       mutex_unlock(&bo_va->mutex);
        spin_lock(&vm->it_lock);
        interval_tree_insert(&mapping->it, &vm->va);
        spin_unlock(&vm->it_lock);
@@ -1121,7 +1124,7 @@ int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
        bool valid = true;
 
        saddr /= AMDGPU_GPU_PAGE_SIZE;
-
+       mutex_lock(&bo_va->mutex);
        list_for_each_entry(mapping, &bo_va->valids, list) {
                if (mapping->it.start == saddr)
                        break;
@@ -1135,10 +1138,12 @@ int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
                                break;
                }
 
-               if (&mapping->list == &bo_va->invalids)
+               if (&mapping->list == &bo_va->invalids) {
+                       mutex_unlock(&bo_va->mutex);
                        return -ENOENT;
+               }
        }
-
+       mutex_unlock(&bo_va->mutex);
        list_del(&mapping->list);
        spin_lock(&vm->it_lock);
        interval_tree_remove(&mapping->it, &vm->va);
@@ -1190,8 +1195,8 @@ void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
                spin_unlock(&vm->it_lock);
                kfree(mapping);
        }
-
        fence_put(bo_va->last_pt_update);
+       mutex_destroy(&bo_va->mutex);
        kfree(bo_va);
 }