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1 | /* |
2 | * Copyright (c) 2014 Samsung Electronics Co., Ltd. | |
3 | * http://www.samsung.com | |
4 | * | |
5 | * Data structure definition for Exynos IOMMU driver | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #ifndef _EXYNOS_IOMMU_LOG_H_ | |
13 | #define _EXYNOS_IOMMU_LOG_H_ | |
14 | ||
15 | #include <linux/mm.h> | |
16 | #include <linux/mm_types.h> | |
17 | #include <linux/ktime.h> | |
18 | #include <linux/hrtimer.h> | |
19 | #include <linux/gfp.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include <linux/device.h> | |
22 | ||
23 | enum sysmmu_event_log_event { | |
24 | EVENT_SYSMMU_NONE, /* initialized value */ | |
25 | EVENT_SYSMMU_ENABLE, | |
26 | EVENT_SYSMMU_DISABLE, | |
27 | EVENT_SYSMMU_TLB_INV_RANGE, | |
28 | EVENT_SYSMMU_TLB_INV_ALL, | |
29 | EVENT_SYSMMU_POWERON, | |
30 | EVENT_SYSMMU_POWEROFF, | |
31 | EVENT_SYSMMU_IOMMU_ATTACH, | |
32 | EVENT_SYSMMU_IOMMU_DETACH, | |
33 | EVENT_SYSMMU_IOMMU_MAP, | |
34 | EVENT_SYSMMU_IOMMU_UNMAP, | |
35 | EVENT_SYSMMU_IOMMU_ALLOCSLPD, | |
36 | EVENT_SYSMMU_IOMMU_FREESLPD, | |
37 | EVENT_SYSMMU_IOVMM_MAP, | |
38 | EVENT_SYSMMU_IOVMM_UNMAP | |
39 | }; | |
40 | ||
41 | struct sysmmu_event_range { | |
42 | u32 start; | |
43 | u32 end; | |
44 | }; | |
45 | ||
46 | struct sysmmu_event_IOMMU_MAP { | |
47 | u32 start; | |
48 | u32 end; | |
49 | unsigned int pfn; | |
50 | }; | |
51 | ||
52 | struct sysmmu_event_IOVMM_MAP { | |
53 | u32 start; | |
54 | u32 end; | |
55 | unsigned int dummy; | |
56 | }; | |
57 | ||
58 | /** | |
59 | * event must be updated before eventdata because of eventdata.dev | |
60 | * sysmmu_event_log is not protected by any locks. That means it permits | |
61 | * some data inconsistency by race condition between updating and reading. | |
62 | * However the problem arises when event is either IOMMU_ATTACH or | |
63 | * IOMMU_DETACH because they stores a pointer to device descriptor to | |
64 | * eventdata.dev and reading the sysmmu_event_log of those events refers | |
65 | * to values pointed by eventdata.dev. | |
66 | * Therefore, eventdata must be updated before event not to access invalid | |
67 | * pointer by reading debugfs entries. | |
68 | */ | |
69 | struct sysmmu_event_log { | |
70 | ktime_t timestamp; | |
71 | union { | |
72 | struct sysmmu_event_range range; | |
73 | struct sysmmu_event_IOMMU_MAP iommu; | |
74 | struct sysmmu_event_IOVMM_MAP iovmm; | |
75 | u32 addr; | |
76 | struct device *dev; | |
77 | } eventdata; | |
78 | enum sysmmu_event_log_event event; | |
79 | }; | |
80 | ||
81 | struct exynos_iommu_event_log { | |
82 | atomic_t index; | |
83 | unsigned int log_len; | |
84 | struct sysmmu_event_log *log; | |
85 | struct dentry *debugfs_root; | |
86 | }; | |
87 | ||
88 | /* sizeof(struct sysmmu_event_log) = 8 + 4 * 3 + 4 = 24 bytes */ | |
89 | #define SYSMMU_LOG_LEN 1024 | |
90 | #define IOMMU_LOG_LEN 4096 | |
91 | #define IOVMM_LOG_LEN 512 | |
92 | ||
93 | #define SYSMMU_DRVDATA_TO_LOG(data) (&(data)->log) | |
94 | #define IOMMU_PRIV_TO_LOG(data) (&(data)->log) | |
95 | #define IOMMU_TO_LOG(data) (&(to_exynos_domain(data))->log) | |
96 | #define IOVMM_TO_LOG(data) (&(data)->log) | |
97 | ||
98 | static inline struct sysmmu_event_log *sysmmu_event_log_get( | |
99 | struct exynos_iommu_event_log *plog) | |
100 | { | |
101 | struct sysmmu_event_log *log; | |
102 | unsigned int index = | |
103 | (unsigned int)atomic_inc_return(&plog->index) - 1; | |
104 | log = &plog->log[index % plog->log_len]; | |
105 | log->timestamp = ktime_get(); | |
106 | return log; | |
107 | } | |
108 | ||
109 | #define DEFINE_SYSMMU_EVENT_LOG(evt) \ | |
110 | static inline void SYSMMU_EVENT_LOG_##evt(struct exynos_iommu_event_log *plog) \ | |
111 | { \ | |
112 | struct sysmmu_event_log *log = sysmmu_event_log_get(plog); \ | |
113 | log->event = EVENT_SYSMMU_##evt; \ | |
114 | } | |
115 | ||
116 | #define DEFINE_SYSMMU_EVENT_LOG_1ADDR(evt) \ | |
117 | static inline void SYSMMU_EVENT_LOG_##evt( \ | |
118 | struct exynos_iommu_event_log *plog, u32 addr) \ | |
119 | { \ | |
120 | struct sysmmu_event_log *log = sysmmu_event_log_get(plog); \ | |
121 | log->eventdata.addr = addr; \ | |
122 | log->event = EVENT_SYSMMU_##evt; \ | |
123 | } | |
124 | ||
125 | #define DEFINE_SYSMMU_EVENT_LOG_2ADDR(evt) \ | |
126 | static inline void SYSMMU_EVENT_LOG_##evt(struct exynos_iommu_event_log *plog, \ | |
127 | u32 start, u32 end) \ | |
128 | { \ | |
129 | struct sysmmu_event_log *log = sysmmu_event_log_get(plog); \ | |
130 | log->eventdata.range.start = start; \ | |
131 | log->eventdata.range.end = end; \ | |
132 | log->event = EVENT_SYSMMU_##evt; \ | |
133 | } | |
134 | ||
135 | static inline void SYSMMU_EVENT_LOG_IOVMM_MAP( | |
136 | struct exynos_iommu_event_log *plog, | |
137 | u32 start, u32 end, unsigned int dummy) | |
138 | { | |
139 | struct sysmmu_event_log *log = sysmmu_event_log_get(plog); | |
140 | log->eventdata.iovmm.start = start; | |
141 | log->eventdata.iovmm.end = end; | |
142 | log->eventdata.iovmm.dummy = dummy; | |
143 | log->event = EVENT_SYSMMU_IOVMM_MAP; | |
144 | } | |
145 | ||
146 | static inline void SYSMMU_EVENT_LOG_IOMMU_ATTACH( | |
147 | struct exynos_iommu_event_log *plog, struct device *dev) | |
148 | { | |
149 | struct sysmmu_event_log *log = sysmmu_event_log_get(plog); | |
150 | log->eventdata.dev = dev; | |
151 | log->event = EVENT_SYSMMU_IOMMU_ATTACH; | |
152 | } | |
153 | ||
154 | static inline void SYSMMU_EVENT_LOG_IOMMU_DETACH( | |
155 | struct exynos_iommu_event_log *plog, struct device *dev) | |
156 | { | |
157 | struct sysmmu_event_log *log = sysmmu_event_log_get(plog); | |
158 | log->eventdata.dev = dev; | |
159 | log->event = EVENT_SYSMMU_IOMMU_DETACH; | |
160 | } | |
161 | ||
162 | static inline void SYSMMU_EVENT_LOG_IOMMU_MAP( | |
163 | struct exynos_iommu_event_log *plog, | |
164 | u32 start, u32 end, unsigned int pfn) | |
165 | { | |
166 | struct sysmmu_event_log *log = sysmmu_event_log_get(plog); | |
167 | log->event = EVENT_SYSMMU_IOMMU_MAP; | |
168 | log->eventdata.iommu.start = start; | |
169 | log->eventdata.iommu.end = end; | |
170 | log->eventdata.iommu.pfn = pfn; | |
171 | } | |
172 | ||
173 | int exynos_iommu_init_event_log(struct exynos_iommu_event_log *log, | |
174 | unsigned int log_len); | |
175 | ||
176 | void sysmmu_add_log_to_debugfs(struct dentry *debugfs_root, | |
177 | struct exynos_iommu_event_log *log, const char *name); | |
178 | ||
179 | void iommu_add_log_to_debugfs(struct dentry *debugfs_root, | |
180 | struct exynos_iommu_event_log *log, const char *name); | |
181 | ||
182 | #if defined(CONFIG_EXYNOS_IOVMM) | |
183 | void iovmm_add_log_to_debugfs(struct dentry *debugfs_root, | |
184 | struct exynos_iommu_event_log *log, const char *name); | |
185 | #else | |
186 | #define iovmm_add_log_to_debugfs(debugfs_root, log, name) do { } while (0) | |
187 | #endif | |
188 | ||
189 | DEFINE_SYSMMU_EVENT_LOG(ENABLE) | |
190 | DEFINE_SYSMMU_EVENT_LOG(DISABLE) | |
191 | DEFINE_SYSMMU_EVENT_LOG(TLB_INV_ALL) | |
192 | DEFINE_SYSMMU_EVENT_LOG(POWERON) | |
193 | DEFINE_SYSMMU_EVENT_LOG(POWEROFF) | |
194 | ||
7f7407f2 JK |
195 | DEFINE_SYSMMU_EVENT_LOG_2ADDR(IOMMU_ALLOCSLPD) |
196 | DEFINE_SYSMMU_EVENT_LOG_2ADDR(IOMMU_FREESLPD) | |
40727f6e JK |
197 | |
198 | DEFINE_SYSMMU_EVENT_LOG_2ADDR(TLB_INV_RANGE) | |
199 | DEFINE_SYSMMU_EVENT_LOG_2ADDR(IOMMU_UNMAP) | |
200 | DEFINE_SYSMMU_EVENT_LOG_2ADDR(IOVMM_UNMAP) | |
201 | ||
202 | #endif /*_EXYNOS_IOMMU_LOG_H_*/ |