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Commit 8c946b89 authored by Felix Kuehling's avatar Felix Kuehling Committed by Oded Gabbay
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drm/amdkfd: Fix SDMA oversubsription handling 



SDMA only supports a fixed number of queues. HWS cannot handle
oversubscription.

Signed-off-by: default avatarshaoyun liu <shaoyun.liu@amd.com>
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 d12fb13f

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

+18 −0
Original line number Diff line number Diff line
@@ -191,6 +191,24 @@ int pqm_create_queue(struct process_queue_manager *pqm, 


	switch (type) {

	case KFD_QUEUE_TYPE_SDMA:

		if (dev->dqm->queue_count >=

			CIK_SDMA_QUEUES_PER_ENGINE * CIK_SDMA_ENGINE_NUM) {

			pr_err("Over-subscription is not allowed for SDMA.\n");

			retval = -EPERM;

			goto err_create_queue;

		}



		retval = create_cp_queue(pqm, dev, &q, properties, f, *qid);

		if (retval != 0)

			goto err_create_queue;

		pqn->q = q;

		pqn->kq = NULL;

		retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd,

						&q->properties.vmid);

		pr_debug("DQM returned %d for create_queue\n", retval);

		print_queue(q);

		break;



	case KFD_QUEUE_TYPE_COMPUTE:

		/* check if there is over subscription */

		if ((sched_policy == KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&