| Rahul Lakkireddy | b72a32d | 2016-08-22 16:29:06 +0530 | [diff] [blame^] | 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 | enum { |
| 44 | SCHED_STATE_ACTIVE, |
| 45 | SCHED_STATE_UNUSED, |
| 46 | }; |
| 47 | |
| 48 | enum sched_fw_ops { |
| 49 | SCHED_FW_OP_ADD, |
| 50 | }; |
| 51 | |
| 52 | struct sched_class { |
| 53 | u8 state; |
| 54 | u8 idx; |
| 55 | struct ch_sched_params info; |
| 56 | spinlock_t lock; /* Per class lock */ |
| 57 | atomic_t refcnt; |
| 58 | }; |
| 59 | |
| 60 | struct sched_table { /* per port scheduling table */ |
| 61 | u8 sched_size; |
| 62 | rwlock_t rw_lock; /* Table lock */ |
| 63 | struct sched_class tab[0]; |
| 64 | }; |
| 65 | |
| 66 | static inline bool can_sched(struct net_device *dev) |
| 67 | { |
| 68 | struct port_info *pi = netdev2pinfo(dev); |
| 69 | |
| 70 | return !pi->sched_tbl ? false : true; |
| 71 | } |
| 72 | |
| 73 | static inline bool valid_class_id(struct net_device *dev, u8 class_id) |
| 74 | { |
| 75 | struct port_info *pi = netdev2pinfo(dev); |
| 76 | |
| 77 | if ((class_id > pi->sched_tbl->sched_size - 1) && |
| 78 | (class_id != SCHED_CLS_NONE)) |
| 79 | return false; |
| 80 | |
| 81 | return true; |
| 82 | } |
| 83 | |
| 84 | struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev, |
| 85 | struct ch_sched_params *p); |
| 86 | |
| 87 | struct sched_table *t4_init_sched(unsigned int size); |
| 88 | void t4_cleanup_sched(struct adapter *adap); |
| 89 | #endif /* __CXGB4_SCHED_H */ |