LXR linux/drivers/net/ethernet/chelsio/cxgb4/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 10 Gbps */
  46#define SCHED_MAX_RATE_KBPS 10000000U
  47
  48enum {
  49        SCHED_STATE_ACTIVE,
  50        SCHED_STATE_UNUSED,
  51};
  52
  53enum sched_fw_ops {
  54        SCHED_FW_OP_ADD,
  55};
  56
  57enum sched_bind_type {
  58        SCHED_QUEUE,
  59};
  60
  61struct sched_queue_entry {
  62        struct list_head list;
  63        unsigned int cntxt_id;
  64        struct ch_sched_queue param;
  65};
  66
  67struct sched_class {
  68        u8 state;
  69        u8 idx;
  70        struct ch_sched_params info;
  71        struct list_head queue_list;
  72        spinlock_t lock; /* Per class lock */
  73        atomic_t refcnt;
  74};
  75
  76struct sched_table {      /* per port scheduling table */
  77        u8 sched_size;
  78        rwlock_t rw_lock; /* Table lock */
  79        struct sched_class tab[0];
  80};
  81
  82static inline bool can_sched(struct net_device *dev)
  83{
  84        struct port_info *pi = netdev2pinfo(dev);
  85
  86        return !pi->sched_tbl ? false : true;
  87}
  88
  89static inline bool valid_class_id(struct net_device *dev, u8 class_id)
  90{
  91        struct port_info *pi = netdev2pinfo(dev);
  92
  93        if ((class_id > pi->sched_tbl->sched_size - 1) &&
  94            (class_id != SCHED_CLS_NONE))
  95                return false;
  96
  97        return true;
  98}
  99
 100int cxgb4_sched_class_bind(struct net_device *dev, void *arg,
 101                           enum sched_bind_type type);
 102int cxgb4_sched_class_unbind(struct net_device *dev, void *arg,
 103                             enum sched_bind_type type);
 104
 105struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
 106                                            struct ch_sched_params *p);
 107
 108struct sched_table *t4_init_sched(unsigned int size);
 109void t4_cleanup_sched(struct adapter *adap);
 110#endif  /* __CXGB4_SCHED_H */
 111