drm/amdkfd: Add wave control operation to debugger

The wave control operation supports several command types executed upon
existing wave fronts that belong to the currently debugged process.

The available commands are:

HALT   - Freeze wave front(s) execution
RESUME - Resume freezed wave front(s) execution
KILL   - Kill existing wave front(s)
Signed-off-by: Yair Shachar <yair.shachar@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

drivers/gpu/drm/amd/amdkfd/kfd_dbgmgr.c

@@ -133,3 +133,19 @@ long kfd_dbgmgr_unregister(struct kfd_dbgmgr *pmgr, struct kfd_process *p)
 
 	return 0;
 }
+
+long kfd_dbgmgr_wave_control(struct kfd_dbgmgr *pmgr,
+				struct dbg_wave_control_info *wac_info)
+{
+	BUG_ON(!pmgr || !pmgr->dbgdev || !wac_info);
+
+	/* Is the requests coming from the already registered process? */
+	if (pmgr->pasid != wac_info->process->pasid) {
+		pr_debug("H/W debugger support was not registered for requester pasid %d\n",
+				wac_info->process->pasid);
+		return -EINVAL;
+	}
+
+	return (long) pmgr->dbgdev->dbgdev_wave_control(pmgr->dbgdev, wac_info);
+}
+

drivers/gpu/drm/amd/amdkfd/kfd_dbgmgr.h

@@ -268,6 +268,8 @@ struct kfd_dbgdev {
 	/* virtualized function pointers to device dbg */
 	int (*dbgdev_register)(struct kfd_dbgdev *dbgdev);
 	int (*dbgdev_unregister)(struct kfd_dbgdev *dbgdev);
+	int (*dbgdev_wave_control)(struct kfd_dbgdev *dbgdev,
+				struct dbg_wave_control_info *wac_info);
 
 };
 
@@ -283,5 +285,6 @@ void kfd_dbgmgr_destroy(struct kfd_dbgmgr *pmgr);
 bool kfd_dbgmgr_create(struct kfd_dbgmgr **ppmgr, struct kfd_dev *pdev);
 long kfd_dbgmgr_register(struct kfd_dbgmgr *pmgr, struct kfd_process *p);
 long kfd_dbgmgr_unregister(struct kfd_dbgmgr *pmgr, struct kfd_process *p);
-
+long kfd_dbgmgr_wave_control(struct kfd_dbgmgr *pmgr,
+				struct dbg_wave_control_info *wac_info);
 #endif /* KFD_DBGMGR_H_ */

drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c

@@ -915,7 +915,7 @@ static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q,
 	return retval;
 }
 
-static int amdkfd_fence_wait_timeout(unsigned int *fence_addr,
+int amdkfd_fence_wait_timeout(unsigned int *fence_addr,
 				unsigned int fence_value,
 				unsigned long timeout)
 {

drivers/gpu/drm/amd/amdkfd/kfd_priv.h

@@ -656,6 +656,10 @@ int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
 struct kernel_queue *pqm_get_kernel_queue(struct process_queue_manager *pqm,
 						unsigned int qid);
 
+int amdkfd_fence_wait_timeout(unsigned int *fence_addr,
+				unsigned int fence_value,
+				unsigned long timeout);
+
 /* Packet Manager */
 
 #define KFD_HIQ_TIMEOUT (500)