You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
151 lines
3.8 KiB
151 lines
3.8 KiB
/************************************************************************** |
|
* |
|
* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA |
|
* All Rights Reserved. |
|
* |
|
* 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL |
|
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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. |
|
* |
|
**************************************************************************/ |
|
/* |
|
* Thanks to krh and jcristau for the tips on |
|
* going from fd to pci id via fstat and udev. |
|
*/ |
|
|
|
|
|
#ifdef HAVE_CONFIG_H |
|
#include "config.h" |
|
#endif |
|
#include <errno.h> |
|
#include <stdio.h> |
|
#include <stdlib.h> |
|
#include <xf86drm.h> |
|
#include <string.h> |
|
#include <unistd.h> |
|
#include <sys/stat.h> |
|
#include <sys/types.h> |
|
#ifdef MAJOR_IN_MKDEV |
|
#include <sys/mkdev.h> |
|
#endif |
|
#ifdef MAJOR_IN_SYSMACROS |
|
#include <sys/sysmacros.h> |
|
#endif |
|
|
|
#include "libdrm_macros.h" |
|
#include "internal.h" |
|
|
|
#define PATH_SIZE 512 |
|
|
|
static int |
|
linux_name_from_sysfs(int fd, char **out) |
|
{ |
|
char path[PATH_SIZE+1] = ""; /* initialize to please valgrind */ |
|
char link[PATH_SIZE+1] = ""; |
|
struct stat buffer; |
|
unsigned maj, min; |
|
char* slash_name; |
|
int ret; |
|
|
|
/* |
|
* Inside the sysfs directory for the device there is a symlink |
|
* to the directory representing the driver module, that path |
|
* happens to hold the name of the driver. |
|
* |
|
* So lets get the symlink for the drm device. Then read the link |
|
* and filter out the last directory which happens to be the name |
|
* of the driver, which we can use to load the correct interface. |
|
* |
|
* Thanks to Ray Strode of Plymouth for the code. |
|
*/ |
|
|
|
ret = fstat(fd, &buffer); |
|
if (ret) |
|
return -EINVAL; |
|
|
|
if (!S_ISCHR(buffer.st_mode)) |
|
return -EINVAL; |
|
|
|
maj = major(buffer.st_rdev); |
|
min = minor(buffer.st_rdev); |
|
|
|
snprintf(path, PATH_SIZE, "/sys/dev/char/%d:%d/device/driver", maj, min); |
|
|
|
if (readlink(path, link, PATH_SIZE) < 0) |
|
return -EINVAL; |
|
|
|
/* link looks something like this: ../../../bus/pci/drivers/intel */ |
|
slash_name = strrchr(link, '/'); |
|
if (!slash_name) |
|
return -EINVAL; |
|
|
|
/* copy name and at the same time remove the slash */ |
|
*out = strdup(slash_name + 1); |
|
return 0; |
|
} |
|
|
|
static int |
|
linux_from_sysfs(int fd, struct kms_driver **out) |
|
{ |
|
char *name; |
|
int ret; |
|
|
|
ret = linux_name_from_sysfs(fd, &name); |
|
if (ret) |
|
return ret; |
|
|
|
#ifdef HAVE_INTEL |
|
if (!strcmp(name, "intel")) |
|
ret = intel_create(fd, out); |
|
else |
|
#endif |
|
#ifdef HAVE_VMWGFX |
|
if (!strcmp(name, "vmwgfx")) |
|
ret = vmwgfx_create(fd, out); |
|
else |
|
#endif |
|
#ifdef HAVE_NOUVEAU |
|
if (!strcmp(name, "nouveau")) |
|
ret = nouveau_create(fd, out); |
|
else |
|
#endif |
|
#ifdef HAVE_RADEON |
|
if (!strcmp(name, "radeon")) |
|
ret = radeon_create(fd, out); |
|
else |
|
#endif |
|
#ifdef HAVE_EXYNOS |
|
if (!strcmp(name, "exynos")) |
|
ret = exynos_create(fd, out); |
|
else |
|
#endif |
|
ret = -ENOSYS; |
|
|
|
free(name); |
|
return ret; |
|
} |
|
|
|
drm_private int |
|
linux_create(int fd, struct kms_driver **out) |
|
{ |
|
if (!dumb_create(fd, out)) |
|
return 0; |
|
|
|
return linux_from_sysfs(fd, out); |
|
}
|
|
|