drm/amdkfd: Clean up process queue management

Removed unused num_concurrent_processes.

Implemented counting of queues in QPD. This makes counting the queue
list repeatedly in several places unnecessary.

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>

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

@@ -189,6 +189,7 @@ static int create_queue_nocpsch(struct device_queue_manager *dqm,
 	}
 
 	list_add(&q->list, &qpd->queues_list);
+	qpd->queue_count++;
 	if (q->properties.is_active)
 		dqm->queue_count++;
 
@@ -347,6 +348,7 @@ static int destroy_queue_nocpsch_locked(struct device_queue_manager *dqm,
 
 		deallocate_vmid(dqm, qpd, q);
 	}
+	qpd->queue_count--;
 	if (q->properties.is_active)
 		dqm->queue_count--;
 
@@ -856,6 +858,7 @@ static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q,
 		goto out;
 
 	list_add(&q->list, &qpd->queues_list);
+	qpd->queue_count++;
 	if (q->properties.is_active) {
 		dqm->queue_count++;
 		retval = execute_queues_cpsch(dqm,
@@ -1014,6 +1017,7 @@ static int destroy_queue_cpsch(struct device_queue_manager *dqm,
 		dqm->sdma_queue_count--;
 
 	list_del(&q->list);
+	qpd->queue_count--;
 	if (q->properties.is_active)
 		dqm->queue_count--;
 
@@ -1204,6 +1208,7 @@ static int process_termination_cpsch(struct device_queue_manager *dqm,
 			goto out;
 		}
 		list_del(&q->list);
+		qpd->queue_count--;
 		mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj);
 	}
 

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

@@ -140,8 +140,6 @@ static int pm_create_map_process(struct packet_manager *pm, uint32_t *buffer,
 				struct qcm_process_device *qpd)
 {
 	struct pm4_mes_map_process *packet;
-	struct queue *cur;
-	uint32_t num_queues;
 
 	packet = (struct pm4_mes_map_process *)buffer;
 
@@ -156,10 +154,7 @@ static int pm_create_map_process(struct packet_manager *pm, uint32_t *buffer,
 	packet->bitfields10.gds_size = qpd->gds_size;
 	packet->bitfields10.num_gws = qpd->num_gws;
 	packet->bitfields10.num_oac = qpd->num_oac;
-	num_queues = 0;
-	list_for_each_entry(cur, &qpd->queues_list, list)
-		num_queues++;
-	packet->bitfields10.num_queues = (qpd->is_debug) ? 0 : num_queues;
+	packet->bitfields10.num_queues = (qpd->is_debug) ? 0 : qpd->queue_count;
 
 	packet->sh_mem_config = qpd->sh_mem_config;
 	packet->sh_mem_bases = qpd->sh_mem_bases;

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

@@ -405,7 +405,6 @@ struct scheduling_resources {
 struct process_queue_manager {
 	/* data */
 	struct kfd_process	*process;
-	unsigned int		num_concurrent_processes;
 	struct list_head	queues;
 	unsigned long		*queue_slot_bitmap;
 };

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

@@ -149,8 +149,6 @@ int pqm_create_queue(struct process_queue_manager *pqm,
 	struct queue *q;
 	struct process_queue_node *pqn;
 	struct kernel_queue *kq;
-	int num_queues = 0;
-	struct queue *cur;
 	enum kfd_queue_type type = properties->type;
 
 	q = NULL;
@@ -168,11 +166,8 @@ 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)) {
-		list_for_each_entry(cur, &pdd->qpd.queues_list, list)
-			num_queues++;
-		if (num_queues >= dev->device_info->max_no_of_hqd/2)
+	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;
 	}