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Commit 36c2d7eb authored by Felix Kuehling's avatar Felix Kuehling Committed by Oded Gabbay
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drm/amdkfd: Limit queue number per process and device to 127 



HWS uses bit 7 in the queue number of the map process packet for an
undocumented feature. Therefore the queue number per process and
device must be 127 or less.

Signed-off-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
parent bc920fd4

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

+6 −4
Original line number Diff line number Diff line
@@ -150,6 +150,7 @@ int pqm_create_queue(struct process_queue_manager *pqm, 
	struct process_queue_node *pqn;

	struct kernel_queue *kq;

	enum kfd_queue_type type = properties->type;

	unsigned int max_queues = 127; /* HWS limit */



	q = NULL;

	kq = NULL;
@@ -166,10 +167,11 @@ int pqm_create_queue(struct process_queue_manager *pqm, 
	 * If we are just about to create DIQ, the is_debug flag is not set yet

	 * Hence we also check the type as well

	 */

	if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ)) {

		if (pdd->qpd.queue_count >= dev->device_info->max_no_of_hqd/2)

	if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))

		max_queues = dev->device_info->max_no_of_hqd/2;



	if (pdd->qpd.queue_count >= max_queues)

		return -ENOSPC;

	}



	retval = find_available_queue_slot(pqm, qid);

	if (retval != 0)