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drm/amdkfd: Fix SDMA oversubsription handling

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[ Upstream commit 8c946b8988acec785bcf67088b6bd0747f36d2d3 ]

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

Signed-off-by: shaoyun liu <shaoyun.liu@amd.com>
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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Felix Kuehling 2017-11-01 19:21:57 -04:00 committed by Greg Kroah-Hartman
parent 64aca9911a
commit b15f53b46d
1 changed files with 18 additions and 0 deletions
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18
drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
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@ -184,6 +184,24 @@ 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) &&