[PATCH 07/10] drm/amdgpu: add vm_list_lock

[David1.Zhou@xxxxxxx (Chunming Zhou)]

To lock adev->vm_list.

Change-Id: I74d309eca9c22d190dd4072c69d26fa7fdea8884
Signed-off-by: Chunming Zhou <David1.Zhou at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h        | 1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c     | 2 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c     | 4 ++++
 4 files changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index cb18e7d..b800e74 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -2180,6 +2180,7 @@ struct amdgpu_device {
 
 	/* link all vm clients */
 	struct list_head		vm_list;
+	spinlock_t			vm_list_lock;
 };
 
 bool amdgpu_device_is_px(struct drm_device *dev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 8310853..ef73883 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -886,7 +886,9 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
 
 	trace_amdgpu_cs_ioctl(job);
 	amd_sched_entity_push_job(&job->base);
+	spin_lock(&adev->vm_list_lock);
 	list_move(&vm->list, &adev->vm_list);
+	spin_unlock(&adev->vm_list_lock);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 9cc7ae4..f1de23b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1589,6 +1589,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 	spin_lock_init(&adev->audio_endpt_idx_lock);
 
 	INIT_LIST_HEAD(&adev->vm_list);
+	spin_lock_init(&adev->vm_list_lock);
 
 	adev->rmmio_base = pci_resource_start(adev->pdev, 5);
 	adev->rmmio_size = pci_resource_len(adev->pdev, 5);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index ec4619e..df10795 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1633,7 +1633,9 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
 	if (r)
 		goto error_free_page_directory;
 	vm->last_eviction_counter = atomic64_read(&adev->num_evictions);
+	spin_lock(&adev->vm_list_lock);
 	list_add_tail(&vm->list, &adev->vm_list);
+	spin_unlock(&adev->vm_list_lock);
 
 	return 0;
 
@@ -1664,7 +1666,9 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
 	struct amdgpu_bo_va_mapping *mapping, *tmp;
 	int i;
 
+	spin_lock(&adev->vm_list_lock);
 	list_del(&vm->list);
+	spin_unlock(&adev->vm_list_lock);
 	amd_sched_entity_fini(vm->entity.sched, &vm->entity);
 
 	if (!RB_EMPTY_ROOT(&vm->va)) {
-- 
1.9.1