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/*
* Copyright © 2013 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 <sys/stat.h>
#include <sys/mount.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "debugfs.h"
char debugfs_path[128];
char debugfs_dri_path[128];
int debugfs_init(void)
{
const char *path = "/sys/kernel/debug";
struct stat st;
int n;
if (stat("/debug/dri", &st) == 0) {
path = "/debug/dri";
goto find_minor;
}
if (stat("/sys/kernel/debug/dri", &st) == 0)
goto find_minor;
if (stat("/sys/kernel/debug", &st))
return errno;
if (mount("debug", "/sys/kernel/debug", "debugfs", 0, 0))
return errno;
find_minor:
strcpy(debugfs_path, path);
for (n = 0; n < 16; n++) {
int len = sprintf(debugfs_dri_path, "%s/dri/%d", path, n);
sprintf(debugfs_dri_path + len, "/i915_error_state");
if (stat(debugfs_dri_path, &st) == 0) {
debugfs_dri_path[len] = '\0';
return 0;
}
}
debugfs_dri_path[0] = '\0';
return ENOENT;
}
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