diff options
| author | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2024-09-05 10:02:15 -0400 |
|---|---|---|
| committer | Lucas De Marchi <lucas.demarchi@intel.com> | 2024-09-12 13:32:47 -0500 |
| commit | ad92f52312614b0ef6eee07ee64f1e7661072a49 (patch) | |
| tree | 3f2f3838370ce6a522c7d648fc15e33a442fbf45 /drivers/gpu | |
| parent | 83dcf232cc7919725a331359a300fb3929651b6e (diff) | |
drm/xe: Suppress missing outer rpm protection warning
Do not raise a WARN if we are likely within suspending or resuming
path. This is likely this false positive:
rpm_status: 0000:03:00.0 status=RPM_SUSPENDING
console: xe_bo_evict_all (called from suspend)
xe_sched_job_create: dev=0000:03:00.0, ...
xe_sched_job_exec: dev=0000:03:00.0, ...
xe_pm_runtime_put: dev=0000:03:00.0, ...
xe_sched_job_run: dev=0000:03:00.0, ...
rpm_usage: 0000:03:00.0 flags-0 cnt-2 ...
rpm_usage: 0000:03:00.0 flags-0 cnt-2 ...
rpm_usage: 0000:03:00.0 flags-0 cnt-2 ...
console: xe 0000:03:00.0: [drm] Missing outer runtime
PM protection
console: xe_guc_ct_send+0x15/0x50 [xe]
console: guc_exec_queue_run_job+0x1509/0x3950 [xe]
[snip]
console: drm_sched_run_job_work+0x649/0xc20
At this point, BOs are getting evicted from VRAM with rpm
usage-counter = 2, but rpm status = SUSPENDING.
The xe->pm_callback_task won't be equal 'current' because this call is
coming from a work queue.
So, pm_runtime_get_if_active() will be called and return 0 because rpm
status != ACTIVE (but equal SUSPENDING or RESUMING).
v2: Still get the reference even on non suspending/resuming
path (Jonathan, Brost).
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240905140215.56404-1-rodrigo.vivi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit cb85e39dc5d1717fab82810984cce0e54712a3c2)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_pm.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/gpu/drm/xe/xe_pm.c b/drivers/gpu/drm/xe/xe_pm.c index e518557e0eec..9c59a30d7646 100644 --- a/drivers/gpu/drm/xe/xe_pm.c +++ b/drivers/gpu/drm/xe/xe_pm.c @@ -595,6 +595,18 @@ bool xe_pm_runtime_get_if_in_use(struct xe_device *xe) return pm_runtime_get_if_in_use(xe->drm.dev) > 0; } +/* + * Very unreliable! Should only be used to suppress the false positive case + * in the missing outer rpm protection warning. + */ +static bool xe_pm_suspending_or_resuming(struct xe_device *xe) +{ + struct device *dev = xe->drm.dev; + + return dev->power.runtime_status == RPM_SUSPENDING || + dev->power.runtime_status == RPM_RESUMING; +} + /** * xe_pm_runtime_get_noresume - Bump runtime PM usage counter without resuming * @xe: xe device instance @@ -611,8 +623,11 @@ void xe_pm_runtime_get_noresume(struct xe_device *xe) ref = xe_pm_runtime_get_if_in_use(xe); - if (drm_WARN(&xe->drm, !ref, "Missing outer runtime PM protection\n")) + if (!ref) { pm_runtime_get_noresume(xe->drm.dev); + drm_WARN(&xe->drm, !xe_pm_suspending_or_resuming(xe), + "Missing outer runtime PM protection\n"); + } } /** |