linux/drivers/net/ethernet/chelsio/cxgb4/sched.c

/*
 * This file is part of the Chelsio T4 Ethernet driver for Linux.
 *
 * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/module.h>
#include <linux/netdevice.h>

#include "cxgb4.h"
#include "sched.h"

static int t4_sched_class_fw_cmd(struct port_info *pi,
				 struct ch_sched_params *p,
				 enum sched_fw_ops op)
{ … }

static int t4_sched_bind_unbind_op(struct port_info *pi, void *arg,
				   enum sched_bind_type type, bool bind)
{ … }

static void *t4_sched_entry_lookup(struct port_info *pi,
				   enum sched_bind_type type,
				   const u32 val)
{ … }

struct sched_class *cxgb4_sched_queue_lookup(struct net_device *dev,
					     struct ch_sched_queue *p)
{ … }

static int t4_sched_queue_unbind(struct port_info *pi, struct ch_sched_queue *p)
{ … }

static int t4_sched_queue_bind(struct port_info *pi, struct ch_sched_queue *p)
{ … }

static int t4_sched_flowc_unbind(struct port_info *pi, struct ch_sched_flowc *p)
{ … }

static int t4_sched_flowc_bind(struct port_info *pi, struct ch_sched_flowc *p)
{ … }

static void t4_sched_class_unbind_all(struct port_info *pi,
				      struct sched_class *e,
				      enum sched_bind_type type)
{ … }

static int t4_sched_class_bind_unbind_op(struct port_info *pi, void *arg,
					 enum sched_bind_type type, bool bind)
{ … }

/**
 * cxgb4_sched_class_bind - Bind an entity to a scheduling class
 * @dev: net_device pointer
 * @arg: Entity opaque data
 * @type: Entity type (Queue)
 *
 * Binds an entity (queue) to a scheduling class.  If the entity
 * is bound to another class, it will be unbound from the other class
 * and bound to the class specified in @arg.
 */
int cxgb4_sched_class_bind(struct net_device *dev, void *arg,
			   enum sched_bind_type type)
{ … }

/**
 * cxgb4_sched_class_unbind - Unbind an entity from a scheduling class
 * @dev: net_device pointer
 * @arg: Entity opaque data
 * @type: Entity type (Queue)
 *
 * Unbinds an entity (queue) from a scheduling class.
 */
int cxgb4_sched_class_unbind(struct net_device *dev, void *arg,
			     enum sched_bind_type type)
{ … }

/* If @p is NULL, fetch any available unused class */
static struct sched_class *t4_sched_class_lookup(struct port_info *pi,
						const struct ch_sched_params *p)
{ … }

static struct sched_class *t4_sched_class_alloc(struct port_info *pi,
						struct ch_sched_params *p)
{ … }

/**
 * cxgb4_sched_class_alloc - allocate a scheduling class
 * @dev: net_device pointer
 * @p: new scheduling class to create.
 *
 * Returns pointer to the scheduling class created.  If @p is NULL, then
 * it allocates and returns any available unused scheduling class. If a
 * scheduling class with matching @p is found, then the matching class is
 * returned.
 */
struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
					    struct ch_sched_params *p)
{ … }

/**
 * cxgb4_sched_class_free - free a scheduling class
 * @dev: net_device pointer
 * @classid: scheduling class id to free
 *
 * Frees a scheduling class if there are no users.
 */
void cxgb4_sched_class_free(struct net_device *dev, u8 classid)
{ … }

static void t4_sched_class_free(struct net_device *dev, struct sched_class *e)
{ … }

struct sched_table *t4_init_sched(unsigned int sched_size)
{ … }

void t4_cleanup_sched(struct adapter *adap)
{ … }