1 /*
2 * Copyright (c) 2014 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29 #define IOKIT_ENABLE_SHARED_PTR
30
31 #include <IOKit/IOInterruptAccountingPrivate.h>
32 #include <IOKit/IOKernelReporters.h>
33
34 uint32_t gInterruptAccountingStatisticBitmask =
35 #if !defined(__arm__)
36 /* Disable timestamps for older ARM platforms; they are expensive. */
37 IA_GET_ENABLE_BIT(kInterruptAccountingFirstLevelTimeIndex) |
38 IA_GET_ENABLE_BIT(kInterruptAccountingSecondLevelCPUTimeIndex) |
39 IA_GET_ENABLE_BIT(kInterruptAccountingSecondLevelSystemTimeIndex) |
40 #endif
41 IA_GET_ENABLE_BIT(kInterruptAccountingFirstLevelCountIndex) |
42 IA_GET_ENABLE_BIT(kInterruptAccountingSecondLevelCountIndex);
43
44 IOLock * gInterruptAccountingDataListLock = NULL;
45 queue_head_t gInterruptAccountingDataList;
46
47 void
interruptAccountingInit(void)48 interruptAccountingInit(void)
49 {
50 int bootArgValue = 0;
51
52 if (PE_parse_boot_argn("interrupt_accounting", &bootArgValue, sizeof(bootArgValue))) {
53 gInterruptAccountingStatisticBitmask = bootArgValue;
54 }
55
56 gInterruptAccountingDataListLock = IOLockAlloc();
57
58 assert(gInterruptAccountingDataListLock);
59
60 queue_init(&gInterruptAccountingDataList);
61 }
62
63 void
interruptAccountingDataAddToList(IOInterruptAccountingData * data)64 interruptAccountingDataAddToList(IOInterruptAccountingData * data)
65 {
66 IOLockLock(gInterruptAccountingDataListLock);
67 queue_enter(&gInterruptAccountingDataList, data, IOInterruptAccountingData *, chain);
68 IOLockUnlock(gInterruptAccountingDataListLock);
69 }
70
71 void
interruptAccountingDataRemoveFromList(IOInterruptAccountingData * data)72 interruptAccountingDataRemoveFromList(IOInterruptAccountingData * data)
73 {
74 IOLockLock(gInterruptAccountingDataListLock);
75 queue_remove(&gInterruptAccountingDataList, data, IOInterruptAccountingData *, chain);
76 IOLockUnlock(gInterruptAccountingDataListLock);
77 }
78
79 void
interruptAccountingDataUpdateChannels(IOInterruptAccountingData * data,IOSimpleReporter * reporter)80 interruptAccountingDataUpdateChannels(IOInterruptAccountingData * data, IOSimpleReporter * reporter)
81 {
82 uint64_t i = 0;
83
84 for (i = 0; i < IA_NUM_INTERRUPT_ACCOUNTING_STATISTICS; i++) {
85 if (IA_GET_STATISTIC_ENABLED(i)) {
86 reporter->setValue(IA_GET_CHANNEL_ID(data->interruptIndex, i), data->interruptStatistics[i]);
87 }
88 }
89 }
90
91 void
interruptAccountingDataInheritChannels(IOInterruptAccountingData * data,IOSimpleReporter * reporter)92 interruptAccountingDataInheritChannels(IOInterruptAccountingData * data, IOSimpleReporter * reporter)
93 {
94 uint64_t i = 0;
95
96 for (i = 0; i < IA_NUM_INTERRUPT_ACCOUNTING_STATISTICS; i++) {
97 if (IA_GET_STATISTIC_ENABLED(i)) {
98 data->interruptStatistics[i] = reporter->getValue(IA_GET_CHANNEL_ID(data->interruptIndex, i));
99 }
100 }
101 }
102