drm/amdkfd: Make kfd_process reference counted
This will be used to elliminate the use of the process lock for
preventing concurrent process destruction. This will simplify lock
dependencies between KFD and KGD.
This also simplifies the process destruction in a few ways:
* Don't allocate work struct dynamically
* Remove unnecessary hack that increments mm reference counter
* Remove unnecessary process locking during destruction
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index dca493b..248e4f5 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -34,6 +34,7 @@
#include <linux/idr.h>
#include <linux/kfifo.h>
#include <linux/seq_file.h>
+#include <linux/kref.h>
#include <kgd_kfd_interface.h>
#include "amd_shared.h"
@@ -537,6 +538,9 @@ struct kfd_process {
*/
void *mm;
+ struct kref ref;
+ struct work_struct release_work;
+
struct mutex mutex;
/*