[PATCH v1 2/2] amdgpu: add debugfs file for pt-base per client-id

[Sunil Khatri]

Each drm node is associated with a unique client-id.
Adding root page table base address of the VM under
the client-id node in debugfs.

Signed-off-by: Sunil Khatri <sunil.khatri at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c  | 14 +++++++++++++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h  |  4 +++-
 3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index d2ce7d86dbc8..aa912168fd68 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -1395,7 +1395,7 @@ int amdgpu_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
 	if (r)
 		goto error_pasid;
 
-	r = amdgpu_vm_init(adev, &fpriv->vm, fpriv->xcp_id);
+	r = amdgpu_vm_init(adev, &fpriv->vm, fpriv->xcp_id, file_priv);
 	if (r)
 		goto error_pasid;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 3911c78f8282..33415ecc6819 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2520,6 +2520,17 @@ void amdgpu_vm_set_task_info(struct amdgpu_vm *vm)
 	get_task_comm(vm->task_info->process_name, current->group_leader);
 }
 
+#if defined(CONFIG_DEBUG_FS)
+static int amdgpu_pt_base_show(void *data, u64 *val)
+{
+	struct amdgpu_vm *vm = (struct amdgpu_vm *)data;
+	*val = amdgpu_bo_gpu_offset(vm->root.bo);
+	return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(amdgpu_pt_base_fops, amdgpu_pt_base_show, NULL, "%llx\n");
+#endif
+
 /**
  * amdgpu_vm_init - initialize a vm instance
  *
@@ -2533,7 +2544,7 @@ void amdgpu_vm_set_task_info(struct amdgpu_vm *vm)
  * 0 for success, error for failure.
  */
 int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
-		   int32_t xcp_id)
+		   int32_t xcp_id, struct drm_file *file)
 {
 	struct amdgpu_bo *root_bo;
 	struct amdgpu_bo_vm *root;
@@ -2609,6 +2620,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 	if (r)
 		DRM_DEBUG("Failed to create task info for VM\n");
 
+	debugfs_create_file("pt_base", 0444, file->debugfs_client, vm, &amdgpu_pt_base_fops);
 	amdgpu_bo_unreserve(vm->root.bo);
 	amdgpu_bo_unref(&root_bo);
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index f3ad687125ad..555afaf867c4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -487,7 +487,9 @@ int amdgpu_vm_set_pasid(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 			u32 pasid);
 
 long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout);
-int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, int32_t xcp_id);
+int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, int32_t xcp_id,
+		   struct drm_file *file);
+
 int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm);
 void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm);
 int amdgpu_vm_lock_pd(struct amdgpu_vm *vm, struct drm_exec *exec,
-- 
2.34.1