Commit 5dc3140a authored by Lionel Landwerlin's avatar Lionel Landwerlin

add special script to run on intel hardware

Intel produces fairly beefy Xeon servers on which it would be nice to be
able to run shader-db to get some results pretty fast. Unfortunately those
don't ship with any intel graphics IP (only ancient Matrox cards).

This new script stubs a bunch of ioctls so that we can run shader-db on
hardware that doesn't have a /dev/dri/renderD128.
Signed-off-by: Lionel Landwerlin's avatarLionel Landwerlin <lionel.g.landwerlin@intel.com>
parent fa889012
......@@ -23,7 +23,15 @@ CFLAGS ?= -g -O2 -march=native -pipe
CFLAGS += -std=gnu99 -fopenmp
LDLIBS = -lepoxy -lgbm
INTEL_STUB_CFLAGS = -g -fPIC -shared -Wall `pkg-config libdrm_intel --cflags`
INTEL_STUB_LIBS = -ldl
all: intel_stub.so run
intel_stub.so: intel_stub.c
$(CC) $(INTEL_STUB_CFLAGS) $< -o $@ $(INTEL_STUB_LIBS)
run:
clean:
rm -f run
rm -f intel_stub.so run
#!/bin/bash
# -*- mode: sh -*-
LD_PRELOAD=${PWD}/intel_stub.so${LD_PPRELOAD:+:${LD_PRELOAD}} \
exec ./run $@
/*
* Copyright © 2015-2017 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.
*/
#define _GNU_SOURCE /* for RTLD_NEXT */
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <stdarg.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <dlfcn.h>
#include <i915_drm.h>
static void *(*libc_mmap)(void *addr, size_t len, int prot, int flags,
int fildes, off_t off);
static int (*libc_open)(const char *pathname, int flags, mode_t mode);
static int (*libc_close)(int fd);
static int (*libc_ioctl)(int fd, unsigned long request, void *argp);
static int (*libc_fstat)(int fd, struct stat *buf);
static int (*libc__fxstat)(int ver, int fd, struct stat *buf);
static int (*libc_fcntl)(int fd, int cmd, int param);
static ssize_t (*libc_readlink)(const char *pathname, char *buf, size_t bufsiz);
static int drm_fd = 0x0000BEEF;
#define DRM_MAJOR 226
#define SYSFS_PATH "/sys/dev/char/226:0/device/subsystem"
static int
dispatch_version(int fd, unsigned long request,
struct drm_version *version)
{
static const char name[] = "i915";
static const char date[] = "20160919";
static const char desc[] = "Intel Graphics";
version->version_major = 1;
version->version_minor = 6;
version->version_patchlevel = 0;
if (version->name)
strncpy(version->name, name, version->name_len);
version->name_len = strlen(name);
if (version->date)
strncpy(version->date, date, version->date_len);
version->date_len = strlen(date);
if (version->desc)
strncpy(version->desc, desc, version->desc_len);
version->desc_len = strlen(desc);
return 0;
}
__attribute__ ((visibility ("default"))) int
open(const char *path, int flags, ...)
{
va_list args;
mode_t mode;
if (strcmp(path, "/dev/dri/renderD128") == 0)
return drm_fd;
va_start(args, flags);
mode = va_arg(args, int);
va_end(args);
return libc_open(path, flags, mode);
}
__attribute__ ((visibility ("default"))) int
close(int fd)
{
if (fd == drm_fd)
return 0;
return libc_close(fd);
}
__attribute__ ((visibility ("default"))) int
fstat(int fd, struct stat *buf)
{
if (fd == drm_fd) {
buf->st_mode = S_IFCHR |
(S_IRWXG | S_IRGRP | S_IRWXU | S_IRUSR);
buf->st_uid = 0;
buf->st_gid = getgid();
return 0;
}
return libc_fstat(fd, buf);
}
__attribute__ ((visibility ("default"))) int
__fxstat(int ver, int fd, struct stat *buf)
{
if (fd == drm_fd) {
buf->st_mode = S_IFCHR |
(S_IRWXG | S_IRGRP | S_IRWXU | S_IRUSR);
buf->st_rdev = makedev(DRM_MAJOR, 0);
buf->st_uid = 0;
buf->st_gid = getgid();
return 0;
}
return libc__fxstat(ver, fd, buf);
}
__attribute__ ((visibility ("default"))) int
fcntl(int fd, int cmd, ...)
{
va_list args;
int param;
if (fd == drm_fd && cmd == F_DUPFD_CLOEXEC)
return drm_fd;
va_start(args, cmd);
param = va_arg(args, int);
va_end(args);
return libc_fcntl(fd, cmd, param);
}
__attribute__ ((visibility ("default"))) void *
mmap(void *addr, size_t len, int prot, int flags,
int fildes, off_t off)
{
if (fildes == drm_fd) {
return libc_mmap(NULL, len, prot, flags | MAP_ANONYMOUS,
-1, 0);
} else {
return libc_mmap(addr, len, prot, flags, fildes, off);
}
}
__attribute__ ((visibility ("default"))) ssize_t
readlink(const char *pathname, char *buf, size_t bufsiz)
{
if (strcmp(pathname, SYSFS_PATH) == 0)
return snprintf(buf, bufsiz, "../../../bus/pci");
return libc_readlink(pathname, buf, bufsiz);
}
__attribute__ ((visibility ("default"))) int
ioctl(int fd, unsigned long request, ...)
{
va_list args;
void *argp;
struct stat buf;
va_start(args, request);
argp = va_arg(args, void *);
va_end(args);
if (_IOC_TYPE(request) == DRM_IOCTL_BASE &&
drm_fd != fd && libc_fstat(fd, &buf) == 0 &&
(buf.st_mode & S_IFMT) == S_IFCHR && major(buf.st_rdev) == DRM_MAJOR) {
drm_fd = fd;
}
if (fd == drm_fd) {
switch (request) {
case DRM_IOCTL_VERSION:
return dispatch_version(fd, request, argp);
case DRM_IOCTL_I915_GETPARAM: {
struct drm_i915_getparam *getparam = argp;
if (getparam->param == I915_PARAM_HAS_RELAXED_DELTA)
*getparam->value = 1;
else if (getparam->param == I915_PARAM_CHIPSET_ID) {
*getparam->value = strtod(getenv("INTEL_DEVID_OVERRIDE"), NULL);
}
return 0;
}
case DRM_IOCTL_I915_GEM_GET_APERTURE: {
struct drm_i915_gem_get_aperture *aperture = argp;
aperture->aper_available_size = 128 * 1024 * 1024;
return 0;
}
case DRM_IOCTL_I915_GEM_MMAP: {
struct drm_i915_gem_mmap *arg = argp;
arg->addr_ptr = (uintptr_t)libc_mmap(
NULL, arg->size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
return 0;
}
default:
return 0;
}
} else {
return libc_ioctl(fd, request, argp);
}
}
static void __attribute__ ((constructor))
init(void)
{
libc_open = dlsym(RTLD_NEXT, "open");
libc_close = dlsym(RTLD_NEXT, "close");
libc_fcntl = dlsym(RTLD_NEXT, "fcntl");
libc_fstat = dlsym(RTLD_NEXT, "fstat");
libc__fxstat = dlsym(RTLD_NEXT, "__fxstat");
libc_ioctl = dlsym(RTLD_NEXT, "ioctl");
libc_mmap = dlsym(RTLD_NEXT, "mmap");
libc_readlink = dlsym(RTLD_NEXT, "readlink");
}
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