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 48 enum { 49 SCHED_STATE_ACTIVE, 50 SCHED_STATE_UNUSED, 51 }; 52 53 enum sched_fw_ops { 54 SCHED_FW_OP_ADD, 55 SCHED_FW_OP_DEL, 56 }; 57 58 enum sched_bind_type { 59 SCHED_QUEUE, 60 SCHED_FLOWC, 61 }; 62 63 struct sched_queue_entry { 64 struct list_head list; 65 unsigned int cntxt_id; 66 struct ch_sched_queue param; 67 }; 68 69 struct sched_flowc_entry { 70 struct list_head list; 71 struct ch_sched_flowc param; 72 }; 73 74 struct 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 83 struct sched_table { /* per port scheduling table */ 84 u8 sched_size; 85 struct sched_class tab[0]; 86 }; 87 88 static 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 95 static 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 } 105 106 struct sched_class *cxgb4_sched_queue_lookup(struct net_device *dev, 107 struct ch_sched_queue *p); 108 int cxgb4_sched_class_bind(struct net_device *dev, void *arg, 109 enum sched_bind_type type); 110 int cxgb4_sched_class_unbind(struct net_device *dev, void *arg, 111 enum sched_bind_type type); 112 113 struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev, 114 struct ch_sched_params *p); 115 void cxgb4_sched_class_free(struct net_device *dev, u8 classid); 116 117 struct sched_table *t4_init_sched(unsigned int size); 118 void t4_cleanup_sched(struct adapter *adap); 119 #endif /* __CXGB4_SCHED_H */ 120