130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/**
|
|
* \file drm_init.h
|
|
* Setup/Cleanup for DRM
|
|
*
|
|
* \author Rickard E. (Rik) Faith <faith@valinux.com>
|
|
* \author Gareth Hughes <gareth@valinux.com>
|
|
*/
|
|
|
|
/*
|
|
* Created: Mon Jan 4 08:58:31 1999 by faith@valinux.com
|
|
*
|
|
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
|
|
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
|
|
* 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, 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
|
|
* VA LINUX SYSTEMS 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.
|
|
*/
|
|
|
|
#define __NO_VERSION__
|
|
#include "drmP.h"
|
|
|
|
/** Debug flags. Set by parse_option(). */
|
|
#if 0
|
|
int DRM(flags) = DRM_FLAG_DEBUG;
|
|
#else
|
|
int DRM(flags) = 0;
|
|
#endif
|
|
|
|
/**
|
|
* Parse a single option.
|
|
*
|
|
* \param s option string.
|
|
*
|
|
* \sa See parse_options() for details.
|
|
*/
|
|
static void DRM(parse_option)(char *s)
|
|
{
|
|
char *c, *r;
|
|
|
|
DRM_DEBUG("\"%s\"\n", s);
|
|
if (!s || !*s) return;
|
|
for (c = s; *c && *c != ':'; c++); /* find : or \0 */
|
|
if (*c) r = c + 1; else r = NULL; /* remember remainder */
|
|
*c = '\0'; /* terminate */
|
|
if (!strcmp(s, "debug")) {
|
|
DRM(flags) |= DRM_FLAG_DEBUG;
|
|
DRM_INFO("Debug messages ON\n");
|
|
return;
|
|
}
|
|
DRM_ERROR("\"%s\" is not a valid option\n", s);
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Parse the insmod "drm_opts=" options, or the command-line
|
|
* options passed to the kernel via LILO.
|
|
*
|
|
* \param s contains option_list without the 'drm_opts=' part.
|
|
*
|
|
* The grammar of the format is as
|
|
* follows:
|
|
*
|
|
* \code
|
|
* drm ::= 'drm_opts=' option_list
|
|
* option_list ::= option [ ';' option_list ]
|
|
* option ::= 'device:' major
|
|
* | 'debug'
|
|
* | 'noctx'
|
|
* major ::= INTEGER
|
|
* \endcode
|
|
*
|
|
* - device=major,minor specifies the device number used for /dev/drm
|
|
* - if major == 0 then the misc device is used
|
|
* - if major == 0 and minor == 0 then dynamic misc allocation is used
|
|
* - debug=on specifies that debugging messages will be printk'd
|
|
* - debug=trace specifies that each function call will be logged via printk
|
|
* - debug=off turns off all debugging options
|
|
*
|
|
* \todo Actually only the \e presence of the 'debug' option is currently
|
|
* checked.
|
|
*/
|
|
|
|
void DRM(parse_options)(char *s)
|
|
{
|
|
char *h, *t, *n;
|
|
|
|
DRM_DEBUG("\"%s\"\n", s ?: "");
|
|
if (!s || !*s) return;
|
|
|
|
for (h = t = n = s; h && *h; h = n) {
|
|
for (; *t && *t != ';'; t++); /* find ; or \0 */
|
|
if (*t) n = t + 1; else n = NULL; /* remember next */
|
|
*t = '\0'; /* terminate */
|
|
DRM(parse_option)(h); /* parse */
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check whether DRI will run on this CPU.
|
|
*
|
|
* \return non-zero if the DRI will run on this CPU, or zero otherwise.
|
|
*/
|
|
int DRM(cpu_valid)(void)
|
|
{
|
|
#if defined(__i386__)
|
|
if (boot_cpu_data.x86 == 3) return 0; /* No cmpxchg on a 386 */
|
|
#endif
|
|
#if defined(__sparc__) && !defined(__sparc_v9__)
|
|
return 0; /* No cmpxchg before v9 sparc. */
|
|
#endif
|
|
return 1;
|
|
}
|