[PATCH v4 6/6] drm/amdgpu: use drm_file::name in task_info::process_desc

[Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>]

If a drm_file name is set append it to the process name.

This information is useful with the virtio/native-context driver: this
allows the guest applications identifier to visible in amdgpu's output.

The output in amdgpu_vm_info/amdgpu_gem_info looks like this:
   pid:12255	Process:glxgears/test-set-fd-name ----------

Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h    |  1 +
 .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c  |  3 ++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c        |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c        | 26 +++++++++++++++----
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h        |  2 +-
 drivers/gpu/drm/amd/amdkfd/kfd_process.c      |  3 +++
 6 files changed, 29 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
index f9d119448442..ad909173e419 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
@@ -299,6 +299,7 @@ int amdgpu_amdkfd_gpuvm_set_vm_pasid(struct amdgpu_device *adev,
 				     struct amdgpu_vm *avm, u32 pasid);
 int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct amdgpu_device *adev,
 					struct amdgpu_vm *avm,
+					struct drm_file *filp,
 					void **process_info,
 					struct dma_fence **ef);
 void amdgpu_amdkfd_gpuvm_release_process_vm(struct amdgpu_device *adev,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 6d5fd371d5ce..172882af6705 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -1558,6 +1558,7 @@ int amdgpu_amdkfd_gpuvm_set_vm_pasid(struct amdgpu_device *adev,
 
 int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct amdgpu_device *adev,
 					   struct amdgpu_vm *avm,
+					   struct drm_file *filp,
 					   void **process_info,
 					   struct dma_fence **ef)
 {
@@ -1577,7 +1578,7 @@ int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct amdgpu_device *adev,
 	if (ret)
 		return ret;
 
-	amdgpu_vm_set_task_info(avm);
+	amdgpu_vm_set_task_info(avm, filp);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 891128ecee6d..5d43e24906d2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1178,7 +1178,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
 	}
 
 	/* Use this opportunity to fill in task info for the vm */
-	amdgpu_vm_set_task_info(vm);
+	amdgpu_vm_set_task_info(vm, p->filp);
 
 	if (adev->debug_vm) {
 		/* Invalidate all BOs to test for userspace bugs */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index cec0a5cffcc8..f6e2be6d4e9e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2355,25 +2355,40 @@ amdgpu_vm_get_task_info_pasid(struct amdgpu_device *adev, u32 pasid)
 			amdgpu_vm_get_vm_from_pasid(adev, pasid));
 }
 
-static int amdgpu_vm_create_task_info(struct amdgpu_vm *vm)
+static int amdgpu_vm_create_task_info(struct amdgpu_vm *vm, struct drm_file *filp)
 {
 	char process_name[TASK_COMM_LEN];
-	int desc_len;
+	size_t desc_len;
 
 	get_task_comm(process_name, current->group_leader);
 	desc_len = strlen(process_name);
 
+	mutex_lock(&filp->client_name_lock);
+	if (filp->client_name)
+		desc_len += 1 + strlen(filp->client_name);
+
 	vm->task_info = kzalloc(
 		struct_size(vm->task_info, process_desc, desc_len + 1),
 		GFP_KERNEL);
 
-	if (!vm->task_info)
+	if (!vm->task_info) {
+		mutex_unlock(&filp->client_name_lock);
 		return -ENOMEM;
+	}
 
 	/* Set process attributes now. */
 	vm->task_info->tgid = current->group_leader->pid;
 	strscpy(vm->task_info->process_desc, process_name, desc_len + 1);
 
+	if (filp->client_name) {
+		size_t p_len = strlen(process_name);
+
+		vm->task_info->process_desc[p_len] = '/';
+		strscpy(&vm->task_info->process_desc[p_len + 1],
+			filp->client_name, (desc_len + 1) - (p_len + 1));
+	}
+	mutex_unlock(&filp->client_name_lock);
+
 	kref_init(&vm->task_info->refcount);
 	return 0;
 }
@@ -2382,11 +2397,12 @@ static int amdgpu_vm_create_task_info(struct amdgpu_vm *vm)
  * amdgpu_vm_set_task_info - Sets VMs task info.
  *
  * @vm: vm for which to set the info
+ * @filp: drm_file instance
  */
-void amdgpu_vm_set_task_info(struct amdgpu_vm *vm)
+void amdgpu_vm_set_task_info(struct amdgpu_vm *vm, struct drm_file *filp)
 {
 	if (!vm->task_info) {
-		if (amdgpu_vm_create_task_info(vm))
+		if (amdgpu_vm_create_task_info(vm, filp))
 			return;
 	} else if (vm->task_info->pid == current->pid) {
 		return;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index 44da250217be..8df3dece54c2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -561,7 +561,7 @@ bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid,
 			    u32 vmid, u32 node_id, uint64_t addr, uint64_t ts,
 			    bool write_fault);
 
-void amdgpu_vm_set_task_info(struct amdgpu_vm *vm);
+void amdgpu_vm_set_task_info(struct amdgpu_vm *vm, struct drm_file *filp);
 
 void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
 				struct amdgpu_vm *vm);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index a902950cc060..e473fe433d3f 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -1654,6 +1654,7 @@ int kfd_process_device_init_vm(struct kfd_process_device *pdd,
 			       struct file *drm_file)
 {
 	struct amdgpu_fpriv *drv_priv;
+	struct drm_file *filp;
 	struct amdgpu_vm *avm;
 	struct kfd_process *p;
 	struct dma_fence *ef;
@@ -1673,8 +1674,10 @@ int kfd_process_device_init_vm(struct kfd_process_device *pdd,
 
 	p = pdd->process;
 	dev = pdd->dev;
+	filp = drm_file->private_data;
 
 	ret = amdgpu_amdkfd_gpuvm_acquire_process_vm(dev->adev, avm,
+						     filp,
 						     &p->kgd_process_info,
 						     &ef);
 	if (ret) {
-- 
2.40.1