diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-11-25 10:58:56 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-11-25 13:17:18 +0000 |
| commit | de5825beae9a0ae51f14a92859c6ec916235cd4d (patch) | |
| tree | 1b3c488c44960edddf75b7b7823839b806e0be01 /drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c | |
| parent | da0ef77e1e0ccff703efee82406c629d5c4f4bbb (diff) | |
drm/i915: Serialise with engine-pm around requests on the kernel_context
As the engine->kernel_context is used within the engine-pm barrier, we
have to be careful when emitting requests outside of the barrier, as the
strict timeline locking rules do not apply. Instead, we must ensure the
engine_park() cannot be entered as we build the request, which is
simplest by taking an explicit engine-pm wakeref around the request
construction.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191125105858.1718307-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c index c91fd4e4af29..742628e40201 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c @@ -215,18 +215,26 @@ out_rpm: int intel_engine_flush_barriers(struct intel_engine_cs *engine) { struct i915_request *rq; + int err = 0; if (llist_empty(&engine->barrier_tasks)) return 0; + if (!intel_engine_pm_get_if_awake(engine)) + return 0; + rq = i915_request_create(engine->kernel_context); - if (IS_ERR(rq)) - return PTR_ERR(rq); + if (IS_ERR(rq)) { + err = PTR_ERR(rq); + goto out_rpm; + } idle_pulse(engine, rq); i915_request_add(rq); - return 0; +out_rpm: + intel_engine_pm_put(engine); + return err; } #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) |