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drm/amdgpu: remove entity idle timeout v2 

Removing the entity from scheduling can deadlock the whole system.
Wait forever till the remaining IBs are scheduled.

v2: fix comment as well

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com> (v1)
This commit is contained in:
Christian König 2015-08-21 15:46:43 +02:00 committed by Alex Deucher
parent 02537d6362
commit 062c7fb3eb
2 changed files with 7 additions and 17 deletions
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18
drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
View File

@ -167,32 +167,24 @@ static bool amd_sched_entity_is_idle(struct amd_sched_entity *entity)
* @sched Pointer to scheduler instance
* @entity The pointer to a valid scheduler entity
*
* return 0 if succeed. negative error code on failure
* Cleanup and free the allocated resources.
*/
int amd_sched_entity_fini(struct amd_gpu_scheduler *sched,
struct amd_sched_entity *entity)
void amd_sched_entity_fini(struct amd_gpu_scheduler *sched,
struct amd_sched_entity *entity)
{
struct amd_sched_rq *rq = entity->belongto_rq;
long r;
if (!amd_sched_entity_is_initialized(sched, entity))
return 0;
return;
/**
* The client will not queue more IBs during this fini, consume existing
* queued IBs
*/
r = wait_event_timeout(entity->wait_queue,
amd_sched_entity_is_idle(entity),
msecs_to_jiffies(AMD_GPU_WAIT_IDLE_TIMEOUT_IN_MS));
if (r <= 0)
DRM_INFO("Entity %p is in waiting state during fini\n",
entity);
wait_event(entity->wait_queue, amd_sched_entity_is_idle(entity));
amd_sched_rq_remove_entity(rq, entity);
kfifo_free(&entity->job_queue);
return r;
}
/**

6
drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
View File

@ -27,8 +27,6 @@
#include <linux/kfifo.h>
#include <linux/fence.h>
#define AMD_GPU_WAIT_IDLE_TIMEOUT_IN_MS 3000
struct amd_gpu_scheduler;
struct amd_sched_rq;
@ -124,8 +122,8 @@ int amd_sched_entity_init(struct amd_gpu_scheduler *sched,
struct amd_sched_entity *entity,
struct amd_sched_rq *rq,
uint32_t jobs);
int amd_sched_entity_fini(struct amd_gpu_scheduler *sched,
struct amd_sched_entity *entity);
void amd_sched_entity_fini(struct amd_gpu_scheduler *sched,
struct amd_sched_entity *entity);
int amd_sched_entity_push_job(struct amd_sched_job *sched_job);
struct amd_sched_fence *amd_sched_fence_create(