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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: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Felix Kuehling 2017-09-27 00:09:55 -04:00 committed by Oded Gabbay
parent bc920fd4f4
commit 36c2d7eb5e
1 changed files with 6 additions and 4 deletions
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10
drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
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@ -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)
return -ENOSPC;
}
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)