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drm/amdgpu: fix and cleanup job destruction 

Remove the job reference counting and just properly destroy it from a
work item which blocks on any potential running timeout handler.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk.Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2016-05-19 09:54:15 +02:00 committed by Alex Deucher
parent f42d20a942
commit c5f74f7802
5 changed files with 30 additions and 63 deletions
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1
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View File

@ -755,7 +755,6 @@ int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev, unsigned size,
struct amdgpu_job **job);
void amdgpu_job_free(struct amdgpu_job *job);
void amdgpu_job_free_func(struct kref *refcount);
int amdgpu_job_submit(struct amdgpu_job *job, struct amdgpu_ring *ring,
struct amd_sched_entity *entity, void *owner,
struct fence **f);

3
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
View File

@ -838,8 +838,7 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
p->job = NULL;
r = amd_sched_job_init(&job->base, &ring->sched,
entity, amdgpu_job_free_func,
p->filp, &fence);
entity, p->filp, &fence);
if (r) {
amdgpu_job_free(job);
return r;

18
drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
View File

@ -28,12 +28,6 @@
#include "amdgpu.h"
#include "amdgpu_trace.h"
static void amdgpu_job_free_handler(struct work_struct *ws)
{
struct amdgpu_job *job = container_of(ws, struct amdgpu_job, base.work_free_job);
amd_sched_job_put(&job->base);
}
static void amdgpu_job_timedout(struct amd_sched_job *s_job)
{
struct amdgpu_job *job = container_of(s_job, struct amdgpu_job, base);
@ -42,8 +36,6 @@ static void amdgpu_job_timedout(struct amd_sched_job *s_job)
job->base.sched->name,
atomic_read(&job->ring->fence_drv.last_seq),
job->ring->fence_drv.sync_seq);
amd_sched_job_put(&job->base);
}
int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
@ -64,7 +56,6 @@ int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
(*job)->vm = vm;
(*job)->ibs = (void *)&(*job)[1];
(*job)->num_ibs = num_ibs;
INIT_WORK(&(*job)->base.work_free_job, amdgpu_job_free_handler);
amdgpu_sync_create(&(*job)->sync);
@ -103,9 +94,10 @@ static void amdgpu_job_free_resources(struct amdgpu_job *job)
amdgpu_sync_free(&job->sync);
}
void amdgpu_job_free_func(struct kref *refcount)
void amdgpu_job_free_cb(struct amd_sched_job *s_job)
{
struct amdgpu_job *job = container_of(refcount, struct amdgpu_job, base.refcount);
struct amdgpu_job *job = container_of(s_job, struct amdgpu_job, base);
kfree(job);
}
@ -126,8 +118,7 @@ int amdgpu_job_submit(struct amdgpu_job *job, struct amdgpu_ring *ring,
if (!f)
return -EINVAL;
r = amd_sched_job_init(&job->base, &ring->sched,
entity, amdgpu_job_free_func, owner, &fence);
r = amd_sched_job_init(&job->base, &ring->sched, entity, owner, &fence);
if (r)
return r;
@ -198,4 +189,5 @@ const struct amd_sched_backend_ops amdgpu_sched_ops = {
.dependency = amdgpu_job_dependency,
.run_job = amdgpu_job_run,
.timedout_job = amdgpu_job_timedout,
.free_job = amdgpu_job_free_cb
};

46
drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
View File

@ -319,19 +319,13 @@ static bool amd_sched_entity_in(struct amd_sched_job *sched_job)
return added;
}
static void amd_sched_free_job(struct fence *f, struct fence_cb *cb) {
struct amd_sched_job *job = container_of(cb, struct amd_sched_job,
cb_free_job);
schedule_work(&job->work_free_job);
}
/* job_finish is called after hw fence signaled, and
* the job had already been deleted from ring_mirror_list
*/
static void amd_sched_job_finish(struct amd_sched_job *s_job)
static void amd_sched_job_finish(struct work_struct *work)
{
struct amd_sched_job *next;
struct amd_sched_job *s_job = container_of(work, struct amd_sched_job,
finish_work);
struct amd_gpu_scheduler *sched = s_job->sched;
unsigned long flags;
@ -339,19 +333,26 @@ static void amd_sched_job_finish(struct amd_sched_job *s_job)
spin_lock_irqsave(&sched->job_list_lock, flags);
list_del_init(&s_job->node);
if (sched->timeout != MAX_SCHEDULE_TIMEOUT) {
if (cancel_delayed_work(&s_job->work_tdr))
amd_sched_job_put(s_job);
struct amd_sched_job *next;
cancel_delayed_work_sync(&s_job->work_tdr);
/* queue TDR for next job */
next = list_first_entry_or_null(&sched->ring_mirror_list,
struct amd_sched_job, node);
if (next) {
amd_sched_job_get(next);
if (next)
schedule_delayed_work(&next->work_tdr, sched->timeout);
}
}
spin_unlock_irqrestore(&sched->job_list_lock, flags);
sched->ops->free_job(s_job);
}
static void amd_sched_job_finish_cb(struct fence *f, struct fence_cb *cb)
{
struct amd_sched_job *job = container_of(cb, struct amd_sched_job,
finish_cb);
schedule_work(&job->finish_work);
}
static void amd_sched_job_begin(struct amd_sched_job *s_job)
@ -364,10 +365,7 @@ static void amd_sched_job_begin(struct amd_sched_job *s_job)
if (sched->timeout != MAX_SCHEDULE_TIMEOUT &&
list_first_entry_or_null(&sched->ring_mirror_list,
struct amd_sched_job, node) == s_job)
{
amd_sched_job_get(s_job);
schedule_delayed_work(&s_job->work_tdr, sched->timeout);
}
spin_unlock_irqrestore(&sched->job_list_lock, flags);
}
@ -390,9 +388,9 @@ void amd_sched_entity_push_job(struct amd_sched_job *sched_job)
{
struct amd_sched_entity *entity = sched_job->s_entity;
fence_add_callback(&sched_job->s_fence->base,
&sched_job->cb_free_job, amd_sched_free_job);
trace_amd_sched_job(sched_job);
fence_add_callback(&sched_job->s_fence->base, &sched_job->finish_cb,
amd_sched_job_finish_cb);
wait_event(entity->sched->job_scheduled,
amd_sched_entity_in(sched_job));
}
@ -401,20 +399,17 @@ void amd_sched_entity_push_job(struct amd_sched_job *sched_job)
int amd_sched_job_init(struct amd_sched_job *job,
struct amd_gpu_scheduler *sched,
struct amd_sched_entity *entity,
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);
if (!job->s_fence)
return -ENOMEM;
job->s_fence->s_job = job;
INIT_WORK(&job->finish_work, amd_sched_job_finish);
INIT_LIST_HEAD(&job->node);
INIT_DELAYED_WORK(&job->work_tdr, amd_sched_job_timedout);
job->free_callback = free_cb;
if (fence)
*fence = &job->s_fence->base;
@ -468,9 +463,6 @@ static void amd_sched_process_job(struct fence *f, struct fence_cb *cb)
struct amd_gpu_scheduler *sched = s_fence->sched;
atomic_dec(&sched->hw_rq_count);
amd_sched_job_finish(s_fence->s_job);
amd_sched_fence_signal(s_fence);
trace_amd_sched_process_job(s_fence);

25
drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
View File

@ -74,19 +74,16 @@ struct amd_sched_fence {
struct amd_gpu_scheduler *sched;
spinlock_t lock;
void *owner;
struct amd_sched_job *s_job;
};
struct amd_sched_job {
struct kref refcount;
struct amd_gpu_scheduler *sched;
struct amd_sched_entity *s_entity;
struct amd_sched_fence *s_fence;
struct fence_cb cb_free_job;
struct work_struct work_free_job;
struct list_head node;
struct delayed_work work_tdr;
void (*free_callback)(struct kref *refcount);
struct fence_cb finish_cb;
struct work_struct finish_work;
struct list_head node;
struct delayed_work work_tdr;
};
extern const struct fence_ops amd_sched_fence_ops;
@ -109,6 +106,7 @@ struct amd_sched_backend_ops {
struct fence *(*dependency)(struct amd_sched_job *sched_job);
struct fence *(*run_job)(struct amd_sched_job *sched_job);
void (*timedout_job)(struct amd_sched_job *sched_job);
void (*free_job)(struct amd_sched_job *sched_job);
};
enum amd_sched_priority {
@ -154,18 +152,5 @@ void amd_sched_fence_signal(struct amd_sched_fence *fence);
int amd_sched_job_init(struct amd_sched_job *job,
struct amd_gpu_scheduler *sched,
struct amd_sched_entity *entity,
void (*free_cb)(struct kref* refcount),
void *owner, struct fence **fence);
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