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drm/libdrm/xf86drm.c

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/* xf86drm.c -- User-level interface to DRM device
* Created: Tue Jan 5 08:16:21 1999 by faith@precisioninsight.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.
*
* Authors: Rickard E. (Rik) Faith <faith@valinux.com>
* Kevin E. Martin <martin@valinux.com>
*
* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/xf86drm.c,v 1.17 2000/09/24 13:51:32 alanh Exp $
*
*/
#ifdef XFree86Server
# include "xf86.h"
# include "xf86_OSproc.h"
# include "xf86_ansic.h"
# include "xf86Priv.h"
# define _DRM_MALLOC xalloc
# define _DRM_FREE xfree
# ifndef XFree86LOADER
# include <sys/stat.h>
# include <sys/mman.h>
# endif
#else
# 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>
# include <sys/ioctl.h>
# include <sys/mman.h>
# include <sys/time.h>
# ifdef DRM_USE_MALLOC
# define _DRM_MALLOC malloc
# define _DRM_FREE free
extern int xf86InstallSIGIOHandler(int fd, void (*f)(int, void *), void *);
extern int xf86RemoveSIGIOHandler(int fd);
# else
# include <Xlibint.h>
# define _DRM_MALLOC Xmalloc
# define _DRM_FREE Xfree
# endif
#endif
#ifdef __alpha__
extern unsigned long _bus_base(void);
#define BUS_BASE _bus_base()
#endif
/* Not all systems have MAP_FAILED defined */
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif
#include "xf86drm.h"
#include "drm.h"
#define DRM_FIXED_DEVICE_MAJOR 145
#ifdef __linux__
#include <sys/sysmacros.h> /* for makedev() */
#endif
#ifndef makedev
/* 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. */
#define makedev(x,y) ((dev_t)(((x) << 8) | (y)))
#endif
static void *drmHashTable = NULL; /* Context switch callbacks */
typedef struct drmHashEntry {
int fd;
void (*f)(int, void *, void *);
void *tagTable;
} drmHashEntry;
void *drmMalloc(int size)
{
void *pt;
if ((pt = _DRM_MALLOC(size))) memset(pt, 0, size);
return pt;
}
void drmFree(void *pt)
{
if (pt) _DRM_FREE(pt);
}
/* drmStrdup can't use strdup(3), since it doesn't call _DRM_MALLOC... */
static char *drmStrdup(const char *s)
{
char *retval = NULL;
if (s) {
retval = _DRM_MALLOC(strlen(s)+1);
strcpy(retval, s);
}
return retval;
}
static unsigned long drmGetKeyFromFd(int fd)
{
#ifdef XFree86LOADER
struct xf86stat st;
#else
struct stat st;
#endif
st.st_rdev = 0;
fstat(fd, &st);
return st.st_rdev;
}
static 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;
}
/* drm_open is used to open the /dev/dri device */
static int drm_open(const char *file)
{
int fd = open(file, O_RDWR, 0);
if (fd >= 0) return fd;
return -errno;
}
static int drmOpenDevice(const char *path, long dev,
mode_t mode, uid_t user, gid_t group)
{
#ifdef XFree86LOADER
struct xf86stat st;
#else
struct stat st;
#endif
/* Fiddle mode to remove execute bits */
mode &= ~(S_IXUSR|S_IXGRP|S_IXOTH);
if (!stat(path, &st) && st.st_rdev == dev) {
if (!geteuid()) {
chown(path, user, group);
chmod(path, mode);
}
return drm_open(path);
}
if (geteuid()) return DRM_ERR_NOT_ROOT;
remove(path);
if (mknod(path, S_IFCHR, dev)) {
remove(path);
return DRM_ERR_NOT_ROOT;
}
chown(path, user, group);
chmod(path, mode);
return drm_open(path);
}
/* drmAvailable looks for /proc/dri, and returns 1 if it is present. On
OSs that do not have a Linux-like /proc, this information will not be
available, and we'll have to create a device and check if the driver is
loaded that way. */
int drmAvailable(void)
{
char dev_name[64];
drmVersionPtr version;
int retval = 0;
int fd;
if (!access("/proc/dri/0", R_OK)) return 1;
sprintf(dev_name, "/dev/dri-temp-%d", getpid());
remove(dev_name);
if ((fd = drmOpenDevice(dev_name, makedev(DRM_FIXED_DEVICE_MAJOR, 0),
S_IRUSR, geteuid(), getegid())) >= 0) {
/* Read version to make sure this is
actually a DRI device. */
if ((version = drmGetVersion(fd))) {
retval = 1;
drmFreeVersion(version);
}
close(fd);
}
remove(dev_name);
return retval;
}
static int drmOpenByBusid(const char *busid)
{
int i;
char dev_name[64];
char *buf;
int fd;
for (i = 0; i < 8; i++) {
sprintf(dev_name, "/dev/dri/card%d", i);
if ((fd = drm_open(dev_name)) >= 0) {
buf = drmGetBusid(fd);
if (buf && !strcmp(buf, busid)) {
drmFreeBusid(buf);
return fd;
}
if (buf) drmFreeBusid(buf);
close(fd);
}
}
return -1;
}
static int drmOpenByName(const char *name)
{
int i;
char proc_name[64];
char dev_name[64];
char buf[512];
mode_t mode = DRM_DEV_MODE;
mode_t dirmode;
gid_t group = DRM_DEV_GID;
uid_t user = DRM_DEV_UID;
int fd;
char *pt;
char *driver = NULL;
char *devstring;
long dev = 0;
int retcode;
#if defined(XFree86Server)
mode = xf86ConfigDRI.mode ? xf86ConfigDRI.mode : DRM_DEV_MODE;
group = (xf86ConfigDRI.group >= 0) ? xf86ConfigDRI.group : DRM_DEV_GID;
#endif
#if defined(XFree86Server)
if (!drmAvailable()) {
/* try to load the kernel module now */
if (!xf86LoadKernelModule(name)) {
ErrorF("[drm] failed to load kernel module \"%s\"\n",
name);
return -1;
}
}
#else
if (!drmAvailable())
return -1;
#endif
if (!geteuid()) {
dirmode = mode;
if (dirmode & S_IRUSR) dirmode |= S_IXUSR;
if (dirmode & S_IRGRP) dirmode |= S_IXGRP;
if (dirmode & S_IROTH) dirmode |= S_IXOTH;
dirmode &= ~(S_IWGRP | S_IWOTH);
mkdir("/dev/dri", 0);
chown("/dev/dri", user, group);
chmod("/dev/dri", dirmode);
}
for (i = 0; i < 8; i++) {
sprintf(proc_name, "/proc/dri/%d/name", i);
sprintf(dev_name, "/dev/dri/card%d", i);
if ((fd = open(proc_name, 0, 0)) >= 0) {
retcode = read(fd, buf, sizeof(buf)-1);
close(fd);
if (retcode) {
buf[retcode-1] = '\0';
for (driver = pt = buf; *pt && *pt != ' '; ++pt)
;
if (*pt) { /* Device is next */
*pt = '\0';
if (!strcmp(driver, name)) { /* Match */
for (devstring = ++pt; *pt && *pt != ' '; ++pt)
;
if (*pt) { /* Found busid */
return drmOpenByBusid(++pt);
} else { /* No busid */
dev = strtol(devstring, NULL, 0);
return drmOpenDevice(dev_name, dev,
mode, user, group);
}
}
}
}
} else {
drmVersionPtr version;
/* /proc/dri not available, possibly
because we aren't on a Linux system.
So, try to create the next device and
see if it's active. */
dev = makedev(DRM_FIXED_DEVICE_MAJOR, i);
if ((fd = drmOpenDevice(dev_name, dev, mode, user, group))) {
if ((version = drmGetVersion(fd))) {
if (!strcmp(version->name, name)) {
drmFreeVersion(version);
return fd;
}
drmFreeVersion(version);
}
}
remove(dev_name);
}
}
return -1;
}
/* drmOpen looks up the specified name and busid, and opens the device
found. The entry in /dev/dri is created if necessary (and if root).
A file descriptor is returned. On error, the return value is
negative. */
int drmOpen(const char *name, const char *busid)
{
if (busid) return drmOpenByBusid(busid);
return drmOpenByName(name);
}
void drmFreeVersion(drmVersionPtr v)
{
if (!v) return;
if (v->name) drmFree(v->name);
if (v->date) drmFree(v->date);
if (v->desc) drmFree(v->desc);
drmFree(v);
}
static void drmFreeKernelVersion(drm_version_t *v)
{
if (!v) return;
if (v->name) drmFree(v->name);
if (v->date) drmFree(v->date);
if (v->desc) drmFree(v->desc);
drmFree(v);
}
static void drmCopyVersion(drmVersionPtr d, const drm_version_t *s)
{
d->version_major = s->version_major;
d->version_minor = s->version_minor;
d->version_patchlevel = s->version_patchlevel;
d->name_len = s->name_len;
d->name = drmStrdup(s->name);
d->date_len = s->date_len;
d->date = drmStrdup(s->date);
d->desc_len = s->desc_len;
d->desc = drmStrdup(s->desc);
}
/* drmVersion obtains the version information via an ioctl. Similar
* information is available via /proc/dri. */
drmVersionPtr drmGetVersion(int fd)
{
drmVersionPtr retval;
drm_version_t *version = drmMalloc(sizeof(*version));
/* First, get the lengths */
version->name_len = 0;
version->name = NULL;
version->date_len = 0;
version->date = NULL;
version->desc_len = 0;
version->desc = NULL;
if (ioctl(fd, DRM_IOCTL_VERSION, version)) {
drmFreeKernelVersion(version);
return NULL;
}
/* Now, allocate space and get the data */
if (version->name_len)
version->name = drmMalloc(version->name_len + 1);
if (version->date_len)
version->date = drmMalloc(version->date_len + 1);
if (version->desc_len)
version->desc = drmMalloc(version->desc_len + 1);
if (ioctl(fd, DRM_IOCTL_VERSION, version)) {
drmFreeKernelVersion(version);
return NULL;
}
/* The results might not be null-terminated
strings, so terminate them. */
if (version->name_len) version->name[version->name_len] = '\0';
if (version->date_len) version->date[version->date_len] = '\0';
if (version->desc_len) version->desc[version->desc_len] = '\0';
/* Now, copy it all back into the
client-visible data structure... */
retval = drmMalloc(sizeof(*retval));
drmCopyVersion(retval, version);
drmFreeKernelVersion(version);
return retval;
}
void drmFreeBusid(const char *busid)
{
drmFree((void *)busid);
}
char *drmGetBusid(int fd)
{
drm_unique_t u;
u.unique_len = 0;
u.unique = NULL;
if (ioctl(fd, DRM_IOCTL_GET_UNIQUE, &u)) return NULL;
u.unique = drmMalloc(u.unique_len + 1);
if (ioctl(fd, DRM_IOCTL_GET_UNIQUE, &u)) return NULL;
u.unique[u.unique_len] = '\0';
return u.unique;
}
int drmSetBusid(int fd, const char *busid)
{
drm_unique_t u;
u.unique = (char *)busid;
u.unique_len = strlen(busid);
if (ioctl(fd, DRM_IOCTL_SET_UNIQUE, &u)) return -errno;
return 0;
}
int drmGetMagic(int fd, drmMagicPtr magic)
{
drm_auth_t auth;
*magic = 0;
if (ioctl(fd, DRM_IOCTL_GET_MAGIC, &auth)) return -errno;
*magic = auth.magic;
return 0;
}
int drmAuthMagic(int fd, drmMagic magic)
{
drm_auth_t auth;
auth.magic = magic;
if (ioctl(fd, DRM_IOCTL_AUTH_MAGIC, &auth)) return -errno;
return 0;
}
int drmAddMap(int fd,
drmHandle offset,
drmSize size,
drmMapType type,
drmMapFlags flags,
drmHandlePtr handle)
{
drm_map_t map;
map.offset = offset;
#ifdef __alpha__
/* Make sure we add the bus_base to all but shm */
if (type != DRM_SHM)
map.offset += BUS_BASE;
#endif
map.size = size;
map.handle = 0;
map.type = type;
map.flags = flags;
if (ioctl(fd, DRM_IOCTL_ADD_MAP, &map)) return -errno;
if (handle) *handle = (drmHandle)map.handle;
return 0;
}
int drmAddBufs(int fd, int count, int size, drmBufDescFlags flags,
int agp_offset)
{
drm_buf_desc_t request;
request.count = count;
request.size = size;
request.low_mark = 0;
request.high_mark = 0;
request.flags = flags;
request.agp_start = agp_offset;
if (ioctl(fd, DRM_IOCTL_ADD_BUFS, &request)) return -errno;
return request.count;
}
int drmMarkBufs(int fd, double low, double high)
{
drm_buf_info_t info;
int i;
info.count = 0;
info.list = NULL;
if (ioctl(fd, DRM_IOCTL_INFO_BUFS, &info)) return -EINVAL;
if (!info.count) return -EINVAL;
if (!(info.list = drmMalloc(info.count * sizeof(*info.list))))
return -ENOMEM;
if (ioctl(fd, DRM_IOCTL_INFO_BUFS, &info)) {
int retval = -errno;
drmFree(info.list);
return retval;
}
for (i = 0; i < info.count; i++) {
info.list[i].low_mark = low * info.list[i].count;
info.list[i].high_mark = high * info.list[i].count;
if (ioctl(fd, DRM_IOCTL_MARK_BUFS, &info.list[i])) {
int retval = -errno;
drmFree(info.list);
return retval;
}
}
drmFree(info.list);
return 0;
}
int drmFreeBufs(int fd, int count, int *list)
{
drm_buf_free_t request;
request.count = count;
request.list = list;
if (ioctl(fd, DRM_IOCTL_FREE_BUFS, &request)) return -errno;
return 0;
}
int drmClose(int fd)
{
unsigned long key = drmGetKeyFromFd(fd);
drmHashEntry *entry = drmGetEntry(fd);
drmHashDestroy(entry->tagTable);
entry->fd = 0;
entry->f = NULL;
entry->tagTable = NULL;
drmHashDelete(drmHashTable, key);
drmFree(entry);
return close(fd);
}
int drmMap(int fd,
drmHandle handle,
drmSize size,
drmAddressPtr address)
{
static unsigned long pagesize_mask = 0;
if (fd < 0) return -EINVAL;
if (!pagesize_mask)
pagesize_mask = getpagesize() - 1;
size = (size + pagesize_mask) & ~pagesize_mask;
*address = mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, handle);
if (*address == MAP_FAILED) return -errno;
return 0;
}
int drmUnmap(drmAddress address, drmSize size)
{
return munmap(address, size);
}
drmBufInfoPtr drmGetBufInfo(int fd)
{
drm_buf_info_t info;
drmBufInfoPtr retval;
int i;
info.count = 0;
info.list = NULL;
if (ioctl(fd, DRM_IOCTL_INFO_BUFS, &info)) return NULL;
if (info.count) {
if (!(info.list = drmMalloc(info.count * sizeof(*info.list))))
return NULL;
if (ioctl(fd, DRM_IOCTL_INFO_BUFS, &info)) {
drmFree(info.list);
return NULL;
}
/* Now, copy it all back into the
client-visible data structure... */
retval = drmMalloc(sizeof(*retval));
retval->count = info.count;
retval->list = drmMalloc(info.count * sizeof(*retval->list));
for (i = 0; i < info.count; i++) {
retval->list[i].count = info.list[i].count;
retval->list[i].size = info.list[i].size;
retval->list[i].low_mark = info.list[i].low_mark;
retval->list[i].high_mark = info.list[i].high_mark;
}
drmFree(info.list);
return retval;
}
return NULL;
}
drmBufMapPtr drmMapBufs(int fd)
{
drm_buf_map_t bufs;
drmBufMapPtr retval;
int i;
bufs.count = 0;
bufs.list = NULL;
if (ioctl(fd, DRM_IOCTL_MAP_BUFS, &bufs)) return NULL;
if (bufs.count) {
if (!(bufs.list = drmMalloc(bufs.count * sizeof(*bufs.list))))
return NULL;
if (ioctl(fd, DRM_IOCTL_MAP_BUFS, &bufs)) {
drmFree(bufs.list);
return NULL;
}
/* Now, copy it all back into the
client-visible data structure... */
retval = drmMalloc(sizeof(*retval));
retval->count = bufs.count;
retval->list = drmMalloc(bufs.count * sizeof(*retval->list));
for (i = 0; i < bufs.count; i++) {
retval->list[i].idx = bufs.list[i].idx;
retval->list[i].total = bufs.list[i].total;
retval->list[i].used = 0;
retval->list[i].address = bufs.list[i].address;
}
return retval;
}
return NULL;
}
int drmUnmapBufs(drmBufMapPtr bufs)
{
int i;
for (i = 0; i < bufs->count; i++) {
munmap(bufs->list[i].address, bufs->list[i].total);
}
return 0;
}
#define DRM_DMA_RETRY 16
int drmDMA(int fd, drmDMAReqPtr request)
{
drm_dma_t dma;
int ret, i = 0;
/* Copy to hidden structure */
dma.context = request->context;
dma.send_count = request->send_count;
dma.send_indices = request->send_list;
dma.send_sizes = request->send_sizes;
dma.flags = request->flags;
dma.request_count = request->request_count;
dma.request_size = request->request_size;
dma.request_indices = request->request_list;
dma.request_sizes = request->request_sizes;
do {
ret = ioctl( fd, DRM_IOCTL_DMA, &dma );
} while ( ret && errno == EAGAIN && i++ < DRM_DMA_RETRY );
if ( ret == 0 ) {
request->granted_count = dma.granted_count;
return 0;
} else {
return -errno;
}
}
int drmGetLock(int fd, drmContext context, drmLockFlags flags)
{
drm_lock_t lock;
lock.context = context;
lock.flags = 0;
if (flags & DRM_LOCK_READY) lock.flags |= _DRM_LOCK_READY;
if (flags & DRM_LOCK_QUIESCENT) lock.flags |= _DRM_LOCK_QUIESCENT;
if (flags & DRM_LOCK_FLUSH) lock.flags |= _DRM_LOCK_FLUSH;
if (flags & DRM_LOCK_FLUSH_ALL) lock.flags |= _DRM_LOCK_FLUSH_ALL;
if (flags & DRM_HALT_ALL_QUEUES) lock.flags |= _DRM_HALT_ALL_QUEUES;
if (flags & DRM_HALT_CUR_QUEUES) lock.flags |= _DRM_HALT_CUR_QUEUES;
while (ioctl(fd, DRM_IOCTL_LOCK, &lock))
;
return 0;
}
int drmUnlock(int fd, drmContext context)
{
drm_lock_t lock;
lock.context = context;
lock.flags = 0;
return ioctl(fd, DRM_IOCTL_UNLOCK, &lock);
}
drmContextPtr drmGetReservedContextList(int fd, int *count)
{
drm_ctx_res_t res;
drm_ctx_t *list;
drmContextPtr retval;
int i;
res.count = 0;
res.contexts = NULL;
if (ioctl(fd, DRM_IOCTL_RES_CTX, &res)) return NULL;
if (!res.count) return NULL;
if (!(list = drmMalloc(res.count * sizeof(*list)))) return NULL;
if (!(retval = drmMalloc(res.count * sizeof(*retval)))) {
drmFree(list);
return NULL;
}
res.contexts = list;
if (ioctl(fd, DRM_IOCTL_RES_CTX, &res)) return NULL;
for (i = 0; i < res.count; i++) retval[i] = list[i].handle;
drmFree(list);
*count = res.count;
return retval;
}
void drmFreeReservedContextList(drmContextPtr pt)
{
drmFree(pt);
}
int drmCreateContext(int fd, drmContextPtr handle)
{
drm_ctx_t ctx;
ctx.flags = 0; /* Modified with functions below */
if (ioctl(fd, DRM_IOCTL_ADD_CTX, &ctx)) return -errno;
*handle = ctx.handle;
return 0;
}
int drmSwitchToContext(int fd, drmContext context)
{
drm_ctx_t ctx;
ctx.handle = context;
if (ioctl(fd, DRM_IOCTL_SWITCH_CTX, &ctx)) return -errno;
return 0;
}
int drmSetContextFlags(int fd, drmContext context, drmContextFlags flags)
{
drm_ctx_t ctx;
/* Context preserving means that no context
switched are done between DMA buffers
from one context and the next. This is
suitable for use in the X server (which
promises to maintain hardware context,
or in the client-side library when
buffers are swapped on behalf of two
threads. */
ctx.handle = context;
ctx.flags = 0;
if (flags & DRM_CONTEXT_PRESERVED) ctx.flags |= _DRM_CONTEXT_PRESERVED;
if (flags & DRM_CONTEXT_2DONLY) ctx.flags |= _DRM_CONTEXT_2DONLY;
if (ioctl(fd, DRM_IOCTL_MOD_CTX, &ctx)) return -errno;
return 0;
}
int drmGetContextFlags(int fd, drmContext context, drmContextFlagsPtr flags)
{
drm_ctx_t ctx;
ctx.handle = context;
if (ioctl(fd, DRM_IOCTL_GET_CTX, &ctx)) return -errno;
*flags = 0;
if (ctx.flags & _DRM_CONTEXT_PRESERVED) *flags |= DRM_CONTEXT_PRESERVED;
if (ctx.flags & _DRM_CONTEXT_2DONLY) *flags |= DRM_CONTEXT_2DONLY;
return 0;
}
int drmDestroyContext(int fd, drmContext handle)
{
drm_ctx_t ctx;
ctx.handle = handle;
if (ioctl(fd, DRM_IOCTL_RM_CTX, &ctx)) return -errno;
return 0;
}
int drmCreateDrawable(int fd, drmDrawablePtr handle)
{
drm_draw_t draw;
if (ioctl(fd, DRM_IOCTL_ADD_DRAW, &draw)) return -errno;
*handle = draw.handle;
return 0;
}
int drmDestroyDrawable(int fd, drmDrawable handle)
{
drm_draw_t draw;
draw.handle = handle;
if (ioctl(fd, DRM_IOCTL_RM_DRAW, &draw)) return -errno;
return 0;
}
int drmAgpAcquire(int fd)
{
if (ioctl(fd, DRM_IOCTL_AGP_ACQUIRE, NULL)) return -errno;
return 0;
}
int drmAgpRelease(int fd)
{
if (ioctl(fd, DRM_IOCTL_AGP_RELEASE, NULL)) return -errno;
return 0;
}
int drmAgpEnable(int fd, unsigned long mode)
{
drm_agp_mode_t m;
m.mode = mode;
if (ioctl(fd, DRM_IOCTL_AGP_ENABLE, &m)) return -errno;
return 0;
}
int drmAgpAlloc(int fd, unsigned long size, unsigned long type,
unsigned long *address, unsigned long *handle)
{
drm_agp_buffer_t b;
*handle = 0;
b.size = size;
b.handle = 0;
b.type = type;
if (ioctl(fd, DRM_IOCTL_AGP_ALLOC, &b)) return -errno;
if (address != 0UL) *address = b.physical;
*handle = b.handle;
return 0;
}
int drmAgpFree(int fd, unsigned long handle)
{
drm_agp_buffer_t b;
b.size = 0;
b.handle = handle;
if (ioctl(fd, DRM_IOCTL_AGP_FREE, &b)) return -errno;
return 0;
}
int drmAgpBind(int fd, unsigned long handle, unsigned long offset)
{
drm_agp_binding_t b;
b.handle = handle;
b.offset = offset;
if (ioctl(fd, DRM_IOCTL_AGP_BIND, &b)) return -errno;
return 0;
}
int drmAgpUnbind(int fd, unsigned long handle)
{
drm_agp_binding_t b;
b.handle = handle;
b.offset = 0;
if (ioctl(fd, DRM_IOCTL_AGP_UNBIND, &b)) return -errno;
return 0;
}
int drmAgpVersionMajor(int fd)
{
drm_agp_info_t i;
if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return -errno;
return i.agp_version_major;
}
int drmAgpVersionMinor(int fd)
{
drm_agp_info_t i;
if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return -errno;
return i.agp_version_minor;
}
unsigned long drmAgpGetMode(int fd)
{
drm_agp_info_t i;
if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0;
return i.mode;
}
unsigned long drmAgpBase(int fd)
{
drm_agp_info_t i;
if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0;
return i.aperture_base;
}
unsigned long drmAgpSize(int fd)
{
drm_agp_info_t i;
if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0;
return i.aperture_size;
}
unsigned long drmAgpMemoryUsed(int fd)
{
drm_agp_info_t i;
if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0;
return i.memory_used;
}
unsigned long drmAgpMemoryAvail(int fd)
{
drm_agp_info_t i;
if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0;
return i.memory_allowed;
}
unsigned int drmAgpVendorId(int fd)
{
drm_agp_info_t i;
if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0;
return i.id_vendor;
}
unsigned int drmAgpDeviceId(int fd)
{
drm_agp_info_t i;
if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0;
return i.id_device;
}
int drmError(int err, const char *label)
{
switch (err) {
case DRM_ERR_NO_DEVICE: fprintf(stderr, "%s: no device\n", label); break;
case DRM_ERR_NO_ACCESS: fprintf(stderr, "%s: no access\n", label); break;
case DRM_ERR_NOT_ROOT: fprintf(stderr, "%s: not root\n", label); break;
case DRM_ERR_INVALID: fprintf(stderr, "%s: invalid args\n", label);break;
default:
if (err < 0) err = -err;
fprintf( stderr, "%s: error %d (%s)\n", label, err, strerror(err) );
break;
}
return 1;
}
int drmCtlInstHandler(int fd, int irq)
{
drm_control_t ctl;
ctl.func = DRM_INST_HANDLER;
ctl.irq = irq;
if (ioctl(fd, DRM_IOCTL_CONTROL, &ctl)) return -errno;
return 0;
}
int drmCtlUninstHandler(int fd)
{
drm_control_t ctl;
ctl.func = DRM_UNINST_HANDLER;
ctl.irq = 0;
if (ioctl(fd, DRM_IOCTL_CONTROL, &ctl)) return -errno;
return 0;
}
int drmFinish(int fd, int context, drmLockFlags flags)
{
drm_lock_t lock;
lock.context = context;
lock.flags = 0;
if (flags & DRM_LOCK_READY) lock.flags |= _DRM_LOCK_READY;
if (flags & DRM_LOCK_QUIESCENT) lock.flags |= _DRM_LOCK_QUIESCENT;
if (flags & DRM_LOCK_FLUSH) lock.flags |= _DRM_LOCK_FLUSH;
if (flags & DRM_LOCK_FLUSH_ALL) lock.flags |= _DRM_LOCK_FLUSH_ALL;
if (flags & DRM_HALT_ALL_QUEUES) lock.flags |= _DRM_HALT_ALL_QUEUES;
if (flags & DRM_HALT_CUR_QUEUES) lock.flags |= _DRM_HALT_CUR_QUEUES;
if (ioctl(fd, DRM_IOCTL_FINISH, &lock)) return -errno;
return 0;
}
int drmGetInterruptFromBusID(int fd, int busnum, int devnum, int funcnum)
{
drm_irq_busid_t p;
p.busnum = busnum;
p.devnum = devnum;
p.funcnum = funcnum;
if (ioctl(fd, DRM_IOCTL_IRQ_BUSID, &p)) return -errno;
return p.irq;
}
int drmAddContextTag(int fd, drmContext context, void *tag)
{
drmHashEntry *entry = drmGetEntry(fd);
if (drmHashInsert(entry->tagTable, context, tag)) {
drmHashDelete(entry->tagTable, context);
drmHashInsert(entry->tagTable, context, tag);
}
return 0;
}
int drmDelContextTag(int fd, drmContext context)
{
drmHashEntry *entry = drmGetEntry(fd);
return drmHashDelete(entry->tagTable, context);
}
void *drmGetContextTag(int fd, drmContext context)
{
drmHashEntry *entry = drmGetEntry(fd);
void *value;
if (drmHashLookup(entry->tagTable, context, &value)) return NULL;
return value;
}
#if defined(XFree86Server) || defined(DRM_USE_MALLOC)
static void drmSIGIOHandler(int interrupt, void *closure)
{
unsigned long key;
void *value;
ssize_t count;
drm_ctx_t ctx;
typedef void (*_drmCallback)(int, void *, void *);
char buf[256];
drmContext old;
drmContext new;
void *oldctx;
void *newctx;
char *pt;
drmHashEntry *entry;
if (!drmHashTable) return;
if (drmHashFirst(drmHashTable, &key, &value)) {
entry = value;
do {
#if 0
fprintf(stderr, "Trying %d\n", entry->fd);
#endif
if ((count = read(entry->fd, buf, sizeof(buf)))) {
buf[count] = '\0';
#if 0
fprintf(stderr, "Got %s\n", buf);
#endif
for (pt = buf; *pt != ' '; ++pt); /* Find first space */
++pt;
old = strtol(pt, &pt, 0);
new = strtol(pt, NULL, 0);
oldctx = drmGetContextTag(entry->fd, old);
newctx = drmGetContextTag(entry->fd, new);
#if 0
fprintf(stderr, "%d %d %p %p\n", old, new, oldctx, newctx);
#endif
((_drmCallback)entry->f)(entry->fd, oldctx, newctx);
ctx.handle = new;
ioctl(entry->fd, DRM_IOCTL_NEW_CTX, &ctx);
}
} while (drmHashNext(drmHashTable, &key, &value));
}
}
int drmInstallSIGIOHandler(int fd, void (*f)(int, void *, void *))
{
drmHashEntry *entry;
entry = drmGetEntry(fd);
entry->f = f;
return xf86InstallSIGIOHandler(fd, drmSIGIOHandler, 0);
}
int drmRemoveSIGIOHandler(int fd)
{
drmHashEntry *entry = drmGetEntry(fd);
entry->f = NULL;
return xf86RemoveSIGIOHandler(fd);
}
#endif
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