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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 two7 * licenses. You may choose to be licensed under the terms of the GNU8 * General Public License (GPL) Version 2, available from the file9 * COPYING in the main directory of this source tree, or the10 * OpenIB.org BSD license below:11 *12 * Redistribution and use in source and binary forms, with or13 * without modification, are permitted provided that the following14 * conditions are met:15 *16 * - Redistributions of source code must retain the above17 * copyright notice, this list of conditions and the following18 * disclaimer.19 *20 * - Redistributions in binary form must reproduce the above21 * copyright notice, this list of conditions and the following22 * disclaimer in the documentation and/or other materials23 * 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 OF27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE32 * SOFTWARE.33 */34 35#ifndef __CXGB4_SCHED_H36#define __CXGB4_SCHED_H37 38#include <linux/spinlock.h>39#include <linux/atomic.h>40 41#define SCHED_CLS_NONE 0xff42 43#define FW_SCHED_CLS_NONE 0xffffffff44 45/* Max rate that can be set to a scheduling class is 100 Gbps */46#define SCHED_MAX_RATE_KBPS 100000000U47 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 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 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 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 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 */120