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| author | Monk Liu | 2016-03-10 05:14:44 +0100 |
|---|---|---|
| committer | Alex Deucher | 2016-05-02 21:20:07 +0200 |
| commit | b6723c8da55af5309cf06e71a5228f3c02846c5a (patch) | |
| tree | 268b16b48fca9556569ce72c02b9c1a0985b3df3 /drivers/gpu/drm/amd/scheduler | |
| parent | drm/amdgpu: rework TDR in scheduler (v2) (diff) | |
| download | kernel-qcow2-linux-b6723c8da55af5309cf06e71a5228f3c02846c5a.tar.gz kernel-qcow2-linux-b6723c8da55af5309cf06e71a5228f3c02846c5a.tar.xz kernel-qcow2-linux-b6723c8da55af5309cf06e71a5228f3c02846c5a.zip | |
drm/amdgpu: use ref to keep job alive
this is to fix fatal page fault error that occured if:
job is signaled/released after its timeout work is already
put to the global queue (in this case the cancel_delayed_work
will return false), which will lead to NX-protection error
page fault during job_timeout_func.
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/scheduler')
| -rw-r--r-- | drivers/gpu/drm/amd/scheduler/gpu_scheduler.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/scheduler/gpu_scheduler.h | 13 |
2 files changed, 20 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c index b7e8071448c6..639c70de217c 100644 --- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c +++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c @@ -333,7 +333,8 @@ void amd_sched_job_finish(struct amd_sched_job *s_job) struct amd_gpu_scheduler *sched = s_job->sched; if (sched->timeout != MAX_SCHEDULE_TIMEOUT) { - cancel_delayed_work(&s_job->work_tdr); /*TODO: how to deal the case that tdr is running */ + if (cancel_delayed_work(&s_job->work_tdr)) + amd_sched_job_put(s_job); /* queue TDR for next job */ next = list_first_entry_or_null(&sched->ring_mirror_list, @@ -341,6 +342,7 @@ void amd_sched_job_finish(struct amd_sched_job *s_job) if (next) { INIT_DELAYED_WORK(&next->work_tdr, s_job->timeout_callback); + amd_sched_job_get(next); schedule_delayed_work(&next->work_tdr, sched->timeout); } } @@ -354,6 +356,7 @@ void amd_sched_job_begin(struct amd_sched_job *s_job) list_first_entry_or_null(&sched->ring_mirror_list, struct amd_sched_job, node) == s_job) { INIT_DELAYED_WORK(&s_job->work_tdr, s_job->timeout_callback); + amd_sched_job_get(s_job); schedule_delayed_work(&s_job->work_tdr, sched->timeout); } } @@ -382,9 +385,11 @@ int amd_sched_job_init(struct amd_sched_job *job, struct amd_gpu_scheduler *sched, struct amd_sched_entity *entity, void (*timeout_cb)(struct work_struct *work), + void (*free_cb)(struct kref *refcount), void *owner, struct fence **fence) { INIT_LIST_HEAD(&job->node); + kref_init(&job->refcount); job->sched = sched; job->s_entity = entity; job->s_fence = amd_sched_fence_create(entity, owner); @@ -393,6 +398,7 @@ int amd_sched_job_init(struct amd_sched_job *job, job->s_fence->s_job = job; job->timeout_callback = timeout_cb; + job->free_callback = free_cb; if (fence) *fence = &job->s_fence->base; diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h index a5700aded5bf..95ebfd069690 100644 --- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h +++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h @@ -78,6 +78,7 @@ struct amd_sched_fence { }; struct amd_sched_job { + struct kref refcount; struct amd_gpu_scheduler *sched; struct amd_sched_entity *s_entity; struct amd_sched_fence *s_fence; @@ -87,6 +88,7 @@ struct amd_sched_job { struct list_head node; struct delayed_work work_tdr; void (*timeout_callback) (struct work_struct *work); + void (*free_callback)(struct kref *refcount); }; extern const struct fence_ops amd_sched_fence_ops; @@ -155,9 +157,20 @@ int amd_sched_job_init(struct amd_sched_job *job, struct amd_gpu_scheduler *sched, struct amd_sched_entity *entity, void (*timeout_cb)(struct work_struct *work), + void (*free_cb)(struct kref* refcount), void *owner, struct fence **fence); void amd_sched_job_pre_schedule(struct amd_gpu_scheduler *sched , struct amd_sched_job *s_job); void amd_sched_job_finish(struct amd_sched_job *s_job); void amd_sched_job_begin(struct amd_sched_job *s_job); +static inline void amd_sched_job_get(struct amd_sched_job *job) { + if (job) + kref_get(&job->refcount); +} + +static inline void amd_sched_job_put(struct amd_sched_job *job) { + if (job) + kref_put(&job->refcount, job->free_callback); +} + #endif |