sched.h

  1/*
  2 * This file is part of the Chelsio T4 Ethernet driver for Linux.
  3 *
  4 * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved.
  5 *
  6 * This software is available to you under a choice of one of two
  7 * licenses.  You may choose to be licensed under the terms of the GNU
  8 * General Public License (GPL) Version 2, available from the file
  9 * COPYING in the main directory of this source tree, or the
 10 * OpenIB.org BSD license below:
 11 *
 12 *     Redistribution and use in source and binary forms, with or
 13 *     without modification, are permitted provided that the following
 14 *     conditions are met:
 15 *
 16 *      - Redistributions of source code must retain the above
 17 *        copyright notice, this list of conditions and the following
 18 *        disclaimer.
 19 *
 20 *      - Redistributions in binary form must reproduce the above
 21 *        copyright notice, this list of conditions and the following
 22 *        disclaimer in the documentation and/or other materials
 23 *        provided with the distribution.
 24 *
 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 32 * SOFTWARE.
 33 */
 34
 35#ifndef __CXGB4_SCHED_H
 36#define __CXGB4_SCHED_H
 37
 38#include <linux/spinlock.h>
 39#include <linux/atomic.h>
 40
 41#define SCHED_CLS_NONE 0xff
 42
 43#define FW_SCHED_CLS_NONE 0xffffffff
 44
 45/* Max rate that can be set to a scheduling class is 100 Gbps */
 46#define SCHED_MAX_RATE_KBPS 100000000U
 47
 48enum {
 49	SCHED_STATE_ACTIVE,
 50	SCHED_STATE_UNUSED,
 51};
 52
 53enum sched_fw_ops {
 54	SCHED_FW_OP_ADD,
 55	SCHED_FW_OP_DEL,
 56};
 57
 58enum sched_bind_type {
 59	SCHED_QUEUE,
 60	SCHED_FLOWC,
 61};
 62
 63struct sched_queue_entry {
 64	struct list_head list;
 65	unsigned int cntxt_id;
 66	struct ch_sched_queue param;
 67};
 68
 69struct sched_flowc_entry {
 70	struct list_head list;
 71	struct ch_sched_flowc param;
 72};
 73
 74struct ch_sched_class {
 75	u8 state;
 76	u8 idx;
 77	struct ch_sched_params info;
 78	enum sched_bind_type bind_type;
 79	struct list_head entry_list;
 80	atomic_t refcnt;
 81};
 82
 83struct sched_table {      /* per port scheduling table */
 84	u8 sched_size;
 85	struct ch_sched_class tab[] __counted_by(sched_size);
 86};
 87
 88static inline bool can_sched(struct net_device *dev)
 89{
 90	struct port_info *pi = netdev2pinfo(dev);
 91
 92	return !pi->sched_tbl ? false : true;
 93}
 94
 95static inline bool valid_class_id(struct net_device *dev, u8 class_id)
 96{
 97	struct port_info *pi = netdev2pinfo(dev);
 98
 99	if ((class_id > pi->sched_tbl->sched_size - 1) &&
100	    (class_id != SCHED_CLS_NONE))
101		return false;
102
103	return true;
104}
105
106struct ch_sched_class *cxgb4_sched_queue_lookup(struct net_device *dev,
107						struct ch_sched_queue *p);
108int cxgb4_sched_class_bind(struct net_device *dev, void *arg,
109			   enum sched_bind_type type);
110int cxgb4_sched_class_unbind(struct net_device *dev, void *arg,
111			     enum sched_bind_type type);
112
113struct ch_sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
114					       struct ch_sched_params *p);
115void cxgb4_sched_class_free(struct net_device *dev, u8 classid);
116
117struct sched_table *t4_init_sched(unsigned int size);
118void t4_cleanup_sched(struct adapter *adap);
119#endif  /* __CXGB4_SCHED_H */