drm/amdkfd: add smi events for process start and end

rocm-smi will be able to show the events for KFD process
start/end, it is the implementation of this feature.

Signed-off-by: Eric Huang <[e-mail]>
Reviewed-by: Kent Russell <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdkfd/kfd_process.c

···
 	for (i = 0; i < p->n_pdds; i++) {
 		struct kfd_process_device *pdd = p->pdds[i];
 
+		kfd_smi_event_process(pdd, false);
+
 		pr_debug("Releasing pdd (topology id %d, for pid %d)\n",
 			pdd->dev->id, p->lead_thread->pid);
 		kfd_process_device_destroy_cwsr_dgpu(pdd);
···
 
 	pdd->pasid = avm->pasid;
 	pdd->drm_file = drm_file;
+
+	kfd_smi_event_process(pdd, true);
 
 	return 0;
 

drivers/gpu/drm/amd/amdkfd/kfd_smi_events.c

···
 			  pid, address, last - address + 1, node->id, trigger));
 }
 
+void kfd_smi_event_process(struct kfd_process_device *pdd, bool start)
+{
+	struct amdgpu_task_info *task_info;
+	struct amdgpu_vm *avm;
+
+	if (pdd->drm_priv)
+		return;
+
+	avm = drm_priv_to_vm(pdd->drm_priv);
+	task_info = amdgpu_vm_get_task_info_vm(avm);
+
+	if (task_info) {
+		kfd_smi_event_add(0, pdd->dev,
+				  start ? KFD_SMI_EVENT_PROCESS_START :
+				  KFD_SMI_EVENT_PROCESS_END,
+				  KFD_EVENT_FMT_PROCESS(task_info->pid,
+				  task_info->task_name));
+		amdgpu_vm_put_task_info(task_info);
+	}
+}
+
 int kfd_smi_event_open(struct kfd_node *dev, uint32_t *fd)
 {
 	struct kfd_smi_client *client;

drivers/gpu/drm/amd/amdkfd/kfd_smi_events.h

···
 void kfd_smi_event_unmap_from_gpu(struct kfd_node *node, pid_t pid,
 				  unsigned long address, unsigned long last,
 				  uint32_t trigger);
+void kfd_smi_event_process(struct kfd_process_device *pdd, bool start);
 #endif

include/uapi/linux/kfd_ioctl.h

···
 	KFD_SMI_EVENT_QUEUE_EVICTION = 9,
 	KFD_SMI_EVENT_QUEUE_RESTORE = 10,
 	KFD_SMI_EVENT_UNMAP_FROM_GPU = 11,
+	KFD_SMI_EVENT_PROCESS_START = 12,
+	KFD_SMI_EVENT_PROCESS_END = 13,
 
 	/*
 	 * max event number, as a flag bit to get events from all processes,
···
 #define KFD_EVENT_FMT_UNMAP_FROM_GPU(ns, pid, addr, size, node, unmap_trigger)\
 		"%lld -%d @%lx(%lx) %x %d\n", (ns), (pid), (addr), (size),\
 		(node), (unmap_trigger)
+
+#define KFD_EVENT_FMT_PROCESS(pid, task_name)\
+		"%x %s\n", (pid), (task_name)
 
 /**************************************************************************************************
  * CRIU IOCTLs (Checkpoint Restore In Userspace)