[PATCH v3 3/3] panthor: dump task pid and comm on gpu errors

[Chia-I Wu]

It is useful to know which tasks cause gpu errors.

Signed-off-by: Chia-I Wu <olva...@gmail.com>
Reviewed-by: Steven Price <steven.pr...@arm.com>
---
 drivers/gpu/drm/panthor/panthor_sched.c | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/panthor/panthor_sched.c 
b/drivers/gpu/drm/panthor/panthor_sched.c
index 9987aeb4608bc..3a7472baa09ac 100644
--- a/drivers/gpu/drm/panthor/panthor_sched.c
+++ b/drivers/gpu/drm/panthor/panthor_sched.c
@@ -1364,8 +1364,12 @@ cs_slot_process_fatal_event_locked(struct panthor_device 
*ptdev,
        fatal = cs_iface->output->fatal;
        info = cs_iface->output->fatal_info;
 
-       if (group)
+       if (group) {
+               drm_warn(&ptdev->base, "CS_FATAL: pid=%d, comm=%s\n",
+                        group->task_info.pid, group->task_info.comm);
+
                group->fatal_queues |= BIT(cs_id);
+       }
 
        if (CS_EXCEPTION_TYPE(fatal) == DRM_PANTHOR_EXCEPTION_CS_UNRECOVERABLE) 
{
                /* If this exception is unrecoverable, queue a reset, and make
@@ -1425,6 +1429,11 @@ cs_slot_process_fault_event_locked(struct panthor_device 
*ptdev,
                spin_unlock(&queue->fence_ctx.lock);
        }
 
+       if (group) {
+               drm_warn(&ptdev->base, "CS_FAULT: pid=%d, comm=%s\n",
+                        group->task_info.pid, group->task_info.comm);
+       }
+
        drm_warn(&ptdev->base,
                 "CSG slot %d CS slot: %d\n"
                 "CS_FAULT.EXCEPTION_TYPE: 0x%x (%s)\n"
@@ -1641,11 +1650,15 @@ csg_slot_process_progress_timer_event_locked(struct 
panthor_device *ptdev, u32 c
 
        lockdep_assert_held(&sched->lock);
 
-       drm_warn(&ptdev->base, "CSG slot %d progress timeout\n", csg_id);
-
        group = csg_slot->group;
-       if (!drm_WARN_ON(&ptdev->base, !group))
+       if (!drm_WARN_ON(&ptdev->base, !group)) {
+               drm_warn(&ptdev->base, "CSG_PROGRESS_TIMER_EVENT: pid=%d, 
comm=%s\n",
+                        group->task_info.pid, group->task_info.comm);
+
                group->timedout = true;
+       }
+
+       drm_warn(&ptdev->base, "CSG slot %d progress timeout\n", csg_id);
 
        sched_queue_delayed_work(sched, tick, 0);
 }
@@ -3227,7 +3240,8 @@ queue_timedout_job(struct drm_sched_job *sched_job)
        struct panthor_scheduler *sched = ptdev->scheduler;
        struct panthor_queue *queue = group->queues[job->queue_idx];
 
-       drm_warn(&ptdev->base, "job timeout\n");
+       drm_warn(&ptdev->base, "job timeout: pid=%d, comm=%s, seqno=%llu\n",
+                group->task_info.pid, group->task_info.comm, 
job->done_fence->seqno);
 
        drm_WARN_ON(&ptdev->base, atomic_read(&sched->reset.in_progress));
 
-- 
2.50.0.727.gbf7dc18ff4-goog