change otg to host mode

hc

2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777

 kernel/block/bfq-wf2q.c
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@@ -1,19 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Hierarchical Budget Worst-case Fair Weighted Fair Queueing
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  * (B-WF2Q+): hierarchical scheduling algorithm by which the BFQ I/O
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  * scheduler schedules generic entities. The latter can represent
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  * either single bfq queues (associated with processes) or groups of
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  * bfq queues (associated with cgroups).
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- *
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- *  This program is free software; you can redistribute it and/or
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- *  modify it under the terms of the GNU General Public License as
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- *  published by the Free Software Foundation; either version 2 of the
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- *  License, or (at your option) any later version.
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- *
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- *  This program is distributed in the hope that it will be useful,
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- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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- *  General Public License for more details.
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  */
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 #include "bfq-iosched.h"
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10
 
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@@ -44,6 +35,12 @@
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 		BFQ_DEFAULT_GRP_CLASS - 1;
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 }
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+unsigned int bfq_tot_busy_queues(struct bfq_data *bfqd)
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+{
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+	return bfqd->busy_queues[0] + bfqd->busy_queues[1] +
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+		bfqd->busy_queues[2];
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+}
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+
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 static struct bfq_entity *bfq_lookup_next_entity(struct bfq_sched_data *sd,
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 						 bool expiration);
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@@ -53,7 +50,7 @@
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  * bfq_update_next_in_service - update sd->next_in_service
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  * @sd: sched_data for which to perform the update.
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  * @new_entity: if not NULL, pointer to the entity whose activation,
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- *		requeueing or repositionig triggered the invocation of
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+ *		requeueing or repositioning triggered the invocation of
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  *		this function.
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  * @expiration: id true, this function is being invoked after the
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  *             expiration of the in-service entity
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@@ -84,7 +81,7 @@
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 	/*
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 	 * If this update is triggered by the activation, requeueing
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-	 * or repositiong of an entity that does not coincide with
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+	 * or repositioning of an entity that does not coincide with
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 	 * sd->next_in_service, then a full lookup in the active tree
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 	 * can be avoided. In fact, it is enough to check whether the
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 	 * just-modified entity has the same priority as
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@@ -280,10 +277,7 @@
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  */
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 static u64 bfq_delta(unsigned long service, unsigned long weight)
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 {
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-	u64 d = (u64)service << WFQ_SERVICE_SHIFT;
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-
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-	do_div(d, weight);
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-	return d;
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+	return div64_ul((u64)service << WFQ_SERVICE_SHIFT, weight);
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 }
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 /**
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@@ -651,7 +645,7 @@
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 {
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 	struct bfq_queue *bfqq = bfq_entity_to_bfqq(entity);
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-	entity->on_st = false;
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+	entity->on_st_or_in_serv = false;
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 	st->wsum -= entity->weight;
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 	if (bfqq && !is_in_service)
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 		bfq_put_queue(bfqq);
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@@ -731,7 +725,7 @@
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 		struct bfq_queue *bfqq = bfq_entity_to_bfqq(entity);
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 		unsigned int prev_weight, new_weight;
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 		struct bfq_data *bfqd = NULL;
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-		struct rb_root *root;
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+		struct rb_root_cached *root;
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 #ifdef CONFIG_BFQ_GROUP_IOSCHED
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 		struct bfq_sched_data *sd;
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 		struct bfq_group *bfqg;
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@@ -747,6 +741,8 @@
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 		}
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 #endif
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+		/* Matches the smp_wmb() in bfq_group_set_weight. */
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+		smp_rmb();
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 		old_st->wsum -= entity->weight;
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 		if (entity->new_weight != entity->orig_weight) {
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@@ -1003,10 +999,10 @@
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 		 */
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 		bfq_get_entity(entity);
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-		entity->on_st = true;
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+		entity->on_st_or_in_serv = true;
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 	}
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-#ifdef BFQ_GROUP_IOSCHED_ENABLED
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+#ifdef CONFIG_BFQ_GROUP_IOSCHED
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 	if (!bfq_entity_to_bfqq(entity)) { /* bfq_group */
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 		struct bfq_group *bfqg =
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 			container_of(entity, struct bfq_group, entity);
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@@ -1154,15 +1150,14 @@
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 }
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 /**
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- * __bfq_deactivate_entity - deactivate an entity from its service tree.
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- * @entity: the entity to deactivate.
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+ * __bfq_deactivate_entity - update sched_data and service trees for
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+ * entity, so as to represent entity as inactive
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+ * @entity: the entity being deactivated.
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  * @ins_into_idle_tree: if false, the entity will not be put into the
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  *			idle tree.
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  *
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- * Deactivates an entity, independently of its previous state.  Must
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- * be invoked only if entity is on a service tree. Extracts the entity
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- * from that tree, and if necessary and allowed, puts it into the idle
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- * tree.
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+ * If necessary and allowed, puts entity into the idle tree. NOTE:
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+ * entity may be on no tree if in service.
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  */
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 bool __bfq_deactivate_entity(struct bfq_entity *entity, bool ins_into_idle_tree)
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 {
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@@ -1170,7 +1165,10 @@
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 	struct bfq_service_tree *st;
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 	bool is_in_service;
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-	if (!entity->on_st) /* entity never activated, or already inactive */
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+	if (!entity->on_st_or_in_serv) /*
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+					* entity never activated, or
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+					* already inactive
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+					*/
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 		return false;
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 	/*
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@@ -1391,7 +1389,7 @@
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  * In this first case, update the virtual time in @st too (see the
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  * comments on this update inside the function).
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  *
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- * In constrast, if there is an in-service entity, then return the
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+ * In contrast, if there is an in-service entity, then return the
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  * entity that would be set in service if not only the above
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  * conditions, but also the next one held true: the currently
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  * in-service entity, on expiration,
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@@ -1474,12 +1472,12 @@
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 		 * is being invoked as a part of the expiration path
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 		 * of the in-service queue. In this case, even if
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 		 * sd->in_service_entity is not NULL,
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-		 * sd->in_service_entiy at this point is actually not
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+		 * sd->in_service_entity at this point is actually not
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 		 * in service any more, and, if needed, has already
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 		 * been properly queued or requeued into the right
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 		 * tree. The reason why sd->in_service_entity is still
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 		 * not NULL here, even if expiration is true, is that
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-		 * sd->in_service_entiy is reset as a last step in the
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+		 * sd->in_service_entity is reset as a last step in the
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 		 * expiration path. So, if expiration is true, tell
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 		 * __bfq_lookup_next_entity that there is no
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 		 * sd->in_service_entity.
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@@ -1514,7 +1512,7 @@
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 	struct bfq_sched_data *sd;
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 	struct bfq_queue *bfqq;
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-	if (bfqd->busy_queues == 0)
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+	if (bfq_tot_busy_queues(bfqd) == 0)
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 		return NULL;
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 	/*
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@@ -1625,7 +1623,7 @@
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 	 * service tree either, then release the service reference to
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 	 * the queue it represents (taken with bfq_get_entity).
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 	 */
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-	if (!in_serv_entity->on_st) {
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+	if (!in_serv_entity->on_st_or_in_serv) {
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 		/*
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 		 * If no process is referencing in_serv_bfqq any
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 		 * longer, then the service reference may be the only
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@@ -1679,7 +1677,7 @@
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 	bfq_clear_bfqq_busy(bfqq);
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-	bfqd->busy_queues--;
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+	bfqd->busy_queues[bfqq->ioprio_class - 1]--;
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 	if (bfqq->wr_coeff > 1)
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 		bfqd->wr_busy_queues--;
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@@ -1702,7 +1700,7 @@
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 	bfq_activate_bfqq(bfqd, bfqq);
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 	bfq_mark_bfqq_busy(bfqq);
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-	bfqd->busy_queues++;
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+	bfqd->busy_queues[bfqq->ioprio_class - 1]++;
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 	if (!bfqq->dispatched)
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 		if (bfqq->wr_coeff == 1)