| developer | 02e6591 | 2023-08-17 16:33:10 +0800 | [diff] [blame] | 1 | /* adapter_lock.c |
| 2 | * |
| 3 | * Adapter concurrency (locking) management |
| 4 | * Linux kernel-space implementation |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | /***************************************************************************** |
| 9 | * Copyright (c) 2013-2020 by Rambus, Inc. and/or its subsidiaries. |
| 10 | * |
| 11 | * This program is free software: you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation, either version 2 of the License, or |
| 14 | * any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 23 | *****************************************************************************/ |
| 24 | |
| 25 | /*---------------------------------------------------------------------------- |
| 26 | * This module implements (provides) the following interface(s): |
| 27 | */ |
| 28 | |
| 29 | // Adapter locking API |
| 30 | #include "adapter_lock.h" |
| 31 | |
| 32 | |
| 33 | /*---------------------------------------------------------------------------- |
| 34 | * This module uses (requires) the following interface(s): |
| 35 | */ |
| 36 | |
| 37 | // Driver Framework Basic Definitions API |
| 38 | #include "basic_defs.h" // IDENTIFIER_NOT_USED |
| 39 | |
| 40 | // Adapter Lock Internal API |
| 41 | #include "adapter_lock_internal.h" |
| 42 | |
| 43 | // Adapter Memory Allocation API |
| 44 | #include "adapter_alloc.h" |
| 45 | |
| 46 | // Logging API |
| 47 | #undef LOG_SEVERITY_MAX |
| 48 | #define LOG_SEVERITY_MAX LOG_SEVERITY_WARN |
| 49 | #include "log.h" |
| 50 | |
| 51 | // Linux Kernel API |
| 52 | #include <linux/spinlock.h> // spinlock_* |
| 53 | |
| 54 | |
| 55 | /*---------------------------------------------------------------------------- |
| 56 | * Definitions and macros |
| 57 | */ |
| 58 | |
| 59 | |
| 60 | /*---------------------------------------------------------------------------- |
| 61 | * Adapter_Lock_Alloc |
| 62 | */ |
| 63 | Adapter_Lock_t |
| 64 | Adapter_Lock_Alloc(void) |
| 65 | { |
| 66 | spinlock_t * Lock_p; |
| 67 | |
| 68 | size_t LockSize=sizeof(spinlock_t); |
| 69 | if (LockSize==0) |
| 70 | LockSize=4; |
| 71 | |
| 72 | Lock_p = Adapter_Alloc(LockSize); |
| 73 | if (Lock_p == NULL) |
| 74 | return Adapter_Lock_NULL; |
| 75 | |
| 76 | Log_FormattedMessage("%s: Lock = spinlock\n", __func__); |
| 77 | |
| 78 | spin_lock_init(Lock_p); |
| 79 | |
| 80 | return Lock_p; |
| 81 | } |
| 82 | |
| 83 | |
| 84 | /*---------------------------------------------------------------------------- |
| 85 | * Adapter_Lock_Free |
| 86 | */ |
| 87 | void |
| 88 | Adapter_Lock_Free(Adapter_Lock_t Lock) |
| 89 | { |
| 90 | Adapter_Free((void*)Lock); |
| 91 | } |
| 92 | |
| 93 | |
| 94 | /*---------------------------------------------------------------------------- |
| 95 | * Adapter_Lock_Acquire |
| 96 | */ |
| 97 | void |
| 98 | Adapter_Lock_Acquire( |
| 99 | Adapter_Lock_t Lock, |
| 100 | unsigned long * Flags) |
| 101 | { |
| 102 | spin_lock_irqsave((spinlock_t *)Lock, *Flags); |
| 103 | } |
| 104 | |
| 105 | |
| 106 | /*---------------------------------------------------------------------------- |
| 107 | * Adapter_Lock_Release |
| 108 | */ |
| 109 | void |
| 110 | Adapter_Lock_Release( |
| 111 | Adapter_Lock_t Lock, |
| 112 | unsigned long * Flags) |
| 113 | { |
| 114 | spin_unlock_irqrestore((spinlock_t *)Lock, *Flags); |
| 115 | } |
| 116 | |
| 117 | |
| 118 | /* end of file adapter_lock.c */ |