/**
* \file xf86drm.c
* User-level interface to DRM device
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Kevin E. Martin <martin@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
* PRECISION INSIGHT 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.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#define stat_t struct stat
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <stdarg.h>
#include "drm.h"
/* Not all systems have MAP_FAILED defined */
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif
#include "xf86drm.h"
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#define DRM_MAJOR 145
#endif
#ifdef __NetBSD__
#define DRM_MAJOR 34
#endif
# ifdef __OpenBSD__
# define DRM_MAJOR 81
# endif
#ifndef DRM_MAJOR
#define DRM_MAJOR 226 /* Linux */
#endif
#ifndef DRM_MAX_MINOR
#define DRM_MAX_MINOR 16
#endif
/*
* This definition needs to be changed on some systems if dev_t is a structure.
* If there is a header file we can get it from, there would be best.
*/
#ifndef makedev
#define makedev(x,y) ((dev_t)(((x) << 8) | (y)))
#endif
#define DRM_MSG_VERBOSITY 3
static drmServerInfoPtr drm_server_info;
void drmSetServerInfo(drmServerInfoPtr info)
{
drm_server_info = info;
}
/**
* Output a message to stderr.
*
* \param format printf() like format string.
*
* \internal
* This function is a wrapper around vfprintf().
*/
static int drmDebugPrint(const char *format, va_list ap)
{
return vfprintf(stderr, format, ap);
}
static int (*drm_debug_print)(const char *format, va_list ap) = drmDebugPrint;
static void
drmMsg(const char *format, ...)
{
va_list ap;
const char *env;
if (((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) || drm_server_info)
{
va_start(ap, format);
if (drm_server_info) {
drm_server_info->debug_print(format,ap);
} else {
drm_debug_print(format, ap);
}
va_end(ap);
}
}
void
drmSetDebugMsgFunction(int (*debug_msg_ptr)(const char *format, va_list ap))
{
drm_debug_print = debug_msg_ptr;
}
static void *drmHashTable = NULL; /* Context switch callbacks */
void *drmGetHashTable(void)
{
return drmHashTable;
}
void *drmMalloc(int size)
{
void *pt;
if ((pt = malloc(size))) memset(pt, 0, size);
return pt;
}
void drmFree(void *pt)
{
if (pt) free(pt);
}
/* drmStrdup can't use strdup(3), since it doesn't call _DRM_MALLOC... */
static char *drmStrdup(const char *s)
{
char *retval;
if (!s)
return NULL;
retval = malloc(strlen(s)+1);
if (!retval)
return NULL;
strcpy(retval, s);
return retval;
}
static unsigned long drmGetKeyFromFd(int fd)
{
stat_t st;
st.st_rdev = 0;
fstat(fd, &st);
return st.st_rdev;
}
drmHashEntry *drmGetEntry(int fd)
{
unsigned long key = drmGetKeyFromFd(fd);
void *value;
drmHashEntry *entry;
if (!drmHashTable) drmHashTable = drmHashCreate();
if (drmHashLookup(drmHashTable, key, &value)) {
entry = drmMalloc(sizeof(*entry));
entry->fd = fd;
entry->f = NULL;
entry->tagTable = drmHashCreate();
drmHashInsert(drmHashTable, key, entry);
} else {
entry = value;
}
return entry;
}
/**
* Compare two busid strings
*
* \param first
* \param second
*
* \return 1 if matched.
*
* \internal
* This function compares two bus ID strings. It understands the older
* PCI:b:d:f format and the newer pci:oooo:bb:dd.f format. In the format, o is
* domain, b is bus, d is device, f is function.
*/
static int drmMatchBusID(const char *id1, const char *id2)
{
/* First, check if the IDs are exactly the same */
if (strcasecmp(id1, id2) == 0)
return 1;
/* Try to match old/new-style PCI bus IDs. */
if (strncasecmp(id1, "pci", 3) == 0) {
int o1, b1, d1, f1;
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