drm/v3d: Create tracepoints to track the CPU job

Create tracepoints to track the three major events of a CPU job
lifetime:
	1. Submission of a `v3d_submit_cpu` IOCTL
	2. Beginning of the execution of a CPU job
	3. Ending of the execution of a CPU job
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231130164420.932823-11-mcanal@igalia.com

drivers/gpu/drm/v3d/v3d_sched.c

@@ -288,8 +288,12 @@ v3d_cpu_job_run(struct drm_sched_job *sched_job)
 	file->start_ns[V3D_CPU] = local_clock();
 	v3d->queue[V3D_CPU].start_ns = file->start_ns[V3D_CPU];
 
+	trace_v3d_cpu_job_begin(&v3d->drm, job->job_type);
+
 	cpu_job_function[job->job_type](job);
 
+	trace_v3d_cpu_job_end(&v3d->drm, job->job_type);
+
 	runtime = local_clock() - file->start_ns[V3D_CPU];
 
 	file->enabled_ns[V3D_CPU] += runtime;

drivers/gpu/drm/v3d/v3d_submit.c

@@ -824,6 +824,8 @@ v3d_submit_cpu_ioctl(struct drm_device *dev, void *data,
 		goto fail;
 	}
 
+	trace_v3d_submit_cpu_ioctl(&v3d->drm, cpu_job->job_type);
+
 	ret = v3d_job_init(v3d, file_priv, &cpu_job->base,
 			   v3d_job_free, 0, &se, V3D_CPU);
 	if (ret)

drivers/gpu/drm/v3d/v3d_trace.h

@@ -225,6 +225,63 @@ TRACE_EVENT(v3d_submit_csd,
 		      __entry->seqno)
 );
 
+TRACE_EVENT(v3d_submit_cpu_ioctl,
+	    TP_PROTO(struct drm_device *dev, enum v3d_cpu_job_type job_type),
+	    TP_ARGS(dev, job_type),
+
+	    TP_STRUCT__entry(
+			     __field(u32, dev)
+			     __field(enum v3d_cpu_job_type, job_type)
+			     ),
+
+	    TP_fast_assign(
+			   __entry->dev = dev->primary->index;
+			   __entry->job_type = job_type;
+			   ),
+
+	    TP_printk("dev=%u, job_type=%d",
+		      __entry->dev,
+		      __entry->job_type)
+);
+
+TRACE_EVENT(v3d_cpu_job_begin,
+	    TP_PROTO(struct drm_device *dev, enum v3d_cpu_job_type job_type),
+	    TP_ARGS(dev, job_type),
+
+	    TP_STRUCT__entry(
+			     __field(u32, dev)
+			     __field(enum v3d_cpu_job_type, job_type)
+			     ),
+
+	    TP_fast_assign(
+			   __entry->dev = dev->primary->index;
+			   __entry->job_type = job_type;
+			   ),
+
+	    TP_printk("dev=%u, job_type=%d",
+		      __entry->dev,
+		      __entry->job_type)
+);
+
+TRACE_EVENT(v3d_cpu_job_end,
+	    TP_PROTO(struct drm_device *dev, enum v3d_cpu_job_type job_type),
+	    TP_ARGS(dev, job_type),
+
+	    TP_STRUCT__entry(
+			     __field(u32, dev)
+			     __field(enum v3d_cpu_job_type, job_type)
+			     ),
+
+	    TP_fast_assign(
+			   __entry->dev = dev->primary->index;
+			   __entry->job_type = job_type;
+			   ),
+
+	    TP_printk("dev=%u, job_type=%d",
+		      __entry->dev,
+		      __entry->job_type)
+);
+
 TRACE_EVENT(v3d_cache_clean_begin,
 	    TP_PROTO(struct drm_device *dev),
 	    TP_ARGS(dev),