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/*
* Copyright © 2015 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdarg.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/mman.h>
#include <dlfcn.h>
#include <i915_drm.h>
#include <pthread.h>
#include "intel_aub.h"
#include "intel_chipset.h"
#ifdef __FreeBSD__
#include "igt_freebsd.h"
#endif
static int (*libc_close)(int fd);
static int (*libc_ioctl)(int fd, unsigned long request, void *argp);
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
struct trace {
int fd;
FILE *file;
struct trace *next;
} *traces;
#define DRM_MAJOR 226
enum {
ADD_BO = 0,
DEL_BO,
ADD_CTX,
DEL_CTX,
EXEC,
WAIT,
};
static struct trace_verion {
uint32_t magic;
uint32_t version;
} version = {
.magic = 0xdeadbeef,
.version = 1
};
struct trace_add_bo {
uint8_t cmd;
uint32_t handle;
uint64_t size;
} __attribute__((packed));
struct trace_del_bo {
uint8_t cmd;
uint32_t handle;
}__attribute__((packed));
struct trace_add_ctx {
uint8_t cmd;
uint32_t handle;
} __attribute__((packed));
struct trace_del_ctx {
uint8_t cmd;
uint32_t handle;
}__attribute__((packed));
struct trace_exec {
uint8_t cmd;
uint32_t object_count;
uint64_t flags;
uint32_t context;
}__attribute__((packed));
struct trace_exec_object {
uint32_t handle;
uint32_t relocation_count;
uint64_t alignment;
uint64_t offset;
uint64_t flags;
uint64_t rsvd1;
uint64_t rsvd2;
}__attribute__((packed));
struct trace_exec_relocation {
uint32_t target_handle;
uint32_t delta;
uint64_t offset;
uint64_t presumed_offset;
uint32_t read_domains;
uint32_t write_domain;
}__attribute__((packed));
struct trace_wait {
uint8_t cmd;
uint32_t handle;
} __attribute__((packed));
static void __attribute__ ((format(__printf__, 2, 3)))
fail_if(int cond, const char *format, ...)
{
va_list args;
if (!cond)
return;
va_start(args, format);
vfprintf(stderr, format, args);
va_end(args);
abort();
}
static void
trace_exec(struct trace *trace,
const struct drm_i915_gem_execbuffer2 *execbuffer2)
{
#define to_ptr(T, x) ((T *)(uintptr_t)(x))
const struct drm_i915_gem_exec_object2 *exec_objects =
to_ptr(typeof(*exec_objects), execbuffer2->buffers_ptr);
fail_if(execbuffer2->flags & (I915_EXEC_FENCE_IN | I915_EXEC_FENCE_OUT),
"fences not supported yet\n");
flockfile(trace->file);
{
struct trace_exec t = {
EXEC,
execbuffer2->buffer_count,
execbuffer2->flags,
execbuffer2->rsvd1,
};
fwrite(&t, sizeof(t), 1, trace->file);
}
for (uint32_t i = 0; i < execbuffer2->buffer_count; i++) {
const struct drm_i915_gem_exec_object2 *obj = &exec_objects[i];
const struct drm_i915_gem_relocation_entry *relocs =
to_ptr(typeof(*relocs), obj->relocs_ptr);
{
struct trace_exec_object t = {
obj->handle,
obj->relocation_count,
obj->alignment,
obj->offset,
obj->flags,
obj->rsvd1,
obj->rsvd2
};
fwrite(&t, sizeof(t), 1, trace->file);
}
fwrite(relocs, sizeof(*relocs), obj->relocation_count,
trace->file);
}
fflush(trace->file);
funlockfile(trace->file);
#undef to_ptr
}
static void
trace_wait(struct trace *trace, uint32_t handle)
{
struct trace_wait t = { WAIT, handle };
fwrite(&t, sizeof(t), 1, trace->file);
}
static void
trace_add(struct trace *trace, uint32_t handle, uint64_t size)
{
struct trace_add_bo t = { ADD_BO, handle, size };
fwrite(&t, sizeof(t), 1, trace->file);
}
static void
trace_del(struct trace *trace, uint32_t handle)
{
struct trace_del_bo t = { DEL_BO, handle };
fwrite(&t, sizeof(t), 1, trace->file);
}
static void
trace_add_context(struct trace *trace, uint32_t handle)
{
struct trace_add_ctx t = { ADD_CTX, handle };
fwrite(&t, sizeof(t), 1, trace->file);
}
static void
trace_del_context(struct trace *trace, uint32_t handle)
{
struct trace_del_ctx t = { DEL_CTX, handle };
fwrite(&t, sizeof(t), 1, trace->file);
}
int
close(int fd)
{
struct trace *t, **p;
pthread_mutex_lock(&mutex);
for (p = &traces; (t = *p); p = &t->next) {
if (t->fd == fd) {
*p = t->next;
fclose(t->file);
free(t);
break;
}
}
pthread_mutex_unlock(&mutex);
return libc_close(fd);
}
static unsigned long
size_for_fb(const struct drm_mode_fb_cmd *cmd)
{
unsigned long size;
#ifndef ALIGN
#define ALIGN(x, y) (((x) + (y) - 1) & -(y))
#endif
size = ALIGN(cmd->width * cmd->bpp, 64);
size *= cmd->height;
return ALIGN(size, 4096);
}
static int is_i915(int fd)
{
drm_version_t v;
char name[5] = "";
memset(&v, 0, sizeof(v));
v.name_len = 4;
v.name = name;
if (libc_ioctl(fd, DRM_IOCTL_VERSION, &v))
return 0;
return strcmp(name, "i915") == 0;
}
int
#ifdef __GLIBC__
ioctl(int fd, unsigned long request, ...)
#else
ioctl(int fd, int request, ...)
#endif
{
struct trace *t, **p;
va_list args;
void *argp;
int ret;
va_start(args, request);
argp = va_arg(args, void *);
va_end(args);
if (_IOC_TYPE(request) != DRM_IOCTL_BASE)
goto untraced;
pthread_mutex_lock(&mutex);
for (p = &traces; (t = *p); p = &t->next) {
if (fd == t->fd) {
if (traces != t) {
*p = t->next;
t->next = traces;
traces = t;
}
break;
}
}
if (!t) {
char filename[80];
if (!is_i915(fd)) {
pthread_mutex_unlock(&mutex);
goto untraced;
}
t = malloc(sizeof(*t));
if (!t) {
pthread_mutex_unlock(&mutex);
return -ENOMEM;
}
sprintf(filename, "/tmp/trace-%d.%d", getpid(), fd);
t->file = fopen(filename, "w+");
t->fd = fd;
if (!fwrite(&version, sizeof(version), 1, t->file)) {
pthread_mutex_unlock(&mutex);
fclose(t->file);
free(t);
return -ENOMEM;
}
t->next = traces;
traces = t;
}
pthread_mutex_unlock(&mutex);
switch (request) {
case DRM_IOCTL_I915_GEM_EXECBUFFER2:
case DRM_IOCTL_I915_GEM_EXECBUFFER2_WR:
trace_exec(t, argp);
break;
case DRM_IOCTL_GEM_CLOSE: {
struct drm_gem_close *close = argp;
trace_del(t, close->handle);
break;
}
case DRM_IOCTL_I915_GEM_CONTEXT_DESTROY: {
struct drm_i915_gem_context_destroy *close = argp;
trace_del_context(t, close->ctx_id);
break;
}
case DRM_IOCTL_I915_GEM_WAIT: {
struct drm_i915_gem_wait *w = argp;
trace_wait(t, w->bo_handle);
break;
}
case DRM_IOCTL_I915_GEM_SET_DOMAIN: {
struct drm_i915_gem_set_domain *w = argp;
trace_wait(t, w->handle);
break;
}
}
ret = libc_ioctl(fd, request, argp);
if (ret)
return ret;
switch (request) {
case DRM_IOCTL_I915_GEM_CREATE: {
struct drm_i915_gem_create *create = argp;
trace_add(t, create->handle, create->size);
break;
}
case DRM_IOCTL_I915_GEM_USERPTR: {
struct drm_i915_gem_userptr *userptr = argp;
trace_add(t, userptr->handle, userptr->user_size);
break;
}
case DRM_IOCTL_GEM_OPEN: {
struct drm_gem_open *open = argp;
trace_add(t, open->handle, open->size);
break;
}
case DRM_IOCTL_PRIME_FD_TO_HANDLE: {
struct drm_prime_handle *prime = argp;
off_t size = lseek(prime->fd, 0, SEEK_END);
fail_if(size == -1, "failed to get prime bo size\n");
trace_add(t, prime->handle, size);
break;
}
case DRM_IOCTL_MODE_GETFB: {
struct drm_mode_fb_cmd *cmd = argp;
trace_add(t, cmd->handle, size_for_fb(cmd));
break;
}
case DRM_IOCTL_I915_GEM_CONTEXT_CREATE: {
struct drm_i915_gem_context_create *create = argp;
trace_add_context(t, create->ctx_id);
break;
}
}
return 0;
untraced:
return libc_ioctl(fd, request, argp);
}
static void __attribute__ ((constructor))
init(void)
{
libc_close = dlsym(RTLD_NEXT, "close");
libc_ioctl = dlsym(RTLD_NEXT, "ioctl");
fail_if(libc_close == NULL || libc_ioctl == NULL,
"failed to get libc ioctl or close\n");
}
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