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drm/libdrm/xf86drm.c

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Initial revision
1999-12-04 18:19:48 -07:00
/* xf86drm.c -- User-level interface to DRM device
* Created: Tue Jan 5 08:16:21 1999 by faith@precisioninsight.com
* Revised: Fri Jun 18 09:52:23 1999 by faith@precisioninsight.com
*
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* 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.
*
* $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/xf86drm.c,v 1.41 1999/06/21 14:31:20 faith Exp $
* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/xf86drm.c,v 1.3 1999/06/27 14:08:19 dawes 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));
extern int xf86RemoveSIGIOHandler(int fd);
# else
# include <Xlibint.h>
# define _DRM_MALLOC Xmalloc
# define _DRM_FREE Xfree
# endif
#endif
/* Not all systems have MAP_FAILED defined */
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif
#include <sys/sysmacros.h> /* for makedev() */
#include "xf86drm.h"
#include "drm.h"
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);
}
static char *drmStrdup(const char *s)
{
return s ? strdup(s) : NULL;
}
/* drm_lookup searches file for a line tagged with name, and returns the
value for that tag. If busid is NULL, the file format is that used for
/proc/devices and /proc/misc, or the first part of /proc/drm/devices:
<value> <whitespace> <tag>
If the busid is non-NULL, the file format is the extended format used
for /proc/drm/devices:
<value> <whitespace> <name> <whitespace> <busid>
If both name and busid are non-NULL, both must match. If either is
NULL, then the other is matched.
*/
static int drm_lookup(const char *file, const char *name, const char *busid)
{
FILE *str;
char buf[128];
char *pt;
int name_match;
int busid_match;
char *namept = NULL;
char *busidpt = NULL;
if (!(str = fopen(file, "r"))) return DRM_ERR_NO_DEVICE;
while (fgets(buf, sizeof(buf)-1, str)) {
buf[sizeof(buf)-1] = '\0';
for (pt = buf; *pt && isspace(*pt); ++pt); /* skip whitespace */
for (; *pt && !isspace(*pt); ++pt); /* next space or null */
if (isspace(pt[0]) && pt[1]) {
pt++;
for (; *pt && isspace(*pt); ++pt); /* skip whitespace */
namept = pt;
for (; *pt && !isspace(*pt); ++pt); /* next space or null */
if (isspace(pt[0]) && pt[1]) { /* busid present */
*pt = '\0'; /* proper termination */
pt++;
for (; *pt && isspace(*pt); ++pt); /* skip whitespace */
busidpt = pt;
for (; *pt && !isspace(*pt); ++pt); /* next space or null */
}
*pt = '\0'; /* proper termination */
name_match = name ? 0 : 1; /* match if we don't care */
busid_match = busid ? 0 : 1; /* match if we don't care */
if (name && namept && !strcmp(name, namept)) ++name_match;
if (busid && busidpt && !strcmp(busid, busidpt)) ++busid_match;
if (name_match && busid_match) {
fclose(str);
return atoi(buf); /* stops at whitespace */
}
}
}
fclose(str);
return DRM_ERR_NO_DEVICE;
}
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/drm device */
static int drm_open(const char *file)
{
int fd = open(file, O_RDWR, 0);
if (fd >= 0) return fd;
return -errno;
}
/* drmAvailable looks for /proc/drm, and returns 1 if it is present. */
int drmAvailable(void)
{
if (!access(DRM_PROC_DRM, R_OK)) return 1;
return 0;
}
/* drmGetMajor tries to find the major device number for /dev/drm by
searching /proc/devices. A negative value is returned on error. */
static int drmGetMajor(void)
{
int major;
if (!drmAvailable()) return DRM_ERR_NO_DEVICE;
if ((major = drm_lookup(DRM_PROC_DEVICES, DRM_NAME, NULL)) >= 0)
return major;
return DRM_ERR_NO_DEVICE;
}
/* drmGetMinor tries to find the minor device number for name by looking in
/proc/drm/devices. A negative value is retruned on error. */
static int drmGetMinor(const char *name, const char *busid)
{
int minor;
char buf[128];
if (!drmAvailable()) return DRM_ERR_NO_DEVICE;
sprintf(buf, "/proc/%s/%s", DRM_NAME, DRM_DEVICES);
if ((minor = drm_lookup(buf, name, busid))) return minor;
return 0;
}
/* drmOpen looks up the specified name and/or busid in /proc/drm/devices,
and opens the device found. The entry in /dev is created if necessary
(and if root). A file descriptor is returned. On error, the return
value is negative. */
static int drmOpen(const char *name, const char *busid)
{
#ifdef XFree86LOADER
struct xf86stat st;
#else
struct stat st;
#endif
char path[128];
int major;
int minor;
dev_t dev;
if (!drmAvailable()) return DRM_ERR_NO_DEVICE;
if ((major = drmGetMajor()) < 0) return major;
if ((minor = drmGetMinor(name,busid)) < 0) return minor;
dev = makedev(major, minor);
if (!minor) {
sprintf(path, "/dev/%s", DRM_NAME );
} else {
sprintf(path, "/dev/%s%d", DRM_NAME, minor-1 );
}
/* Check device major/minor for match */
if (!access(path, F_OK)) {
if (stat(path, &st)) return DRM_ERR_NO_ACCESS;
if (st.st_rdev == dev) {
#if defined(XFree86Server)
chmod(path,
xf86ConfigDRI.mode ? xf86ConfigDRI.mode : DRM_DEV_MODE);
chown(path, DRM_DEV_UID,
xf86ConfigDRI.group ? xf86ConfigDRI.group : DRM_DEV_GID);
#endif
#if defined(DRM_USE_MALLOC)
chmod(path, DRM_DEV_MODE);
chown(path, DRM_DEV_UID, DRM_DEV_GID);
#endif
return drm_open(path);
}
}
/* Doesn't exist or match failed, so we
have to be root to create it. */
if (geteuid()) return DRM_ERR_NOT_ROOT;
remove(path);
if (mknod(path, S_IFCHR | DRM_DEV_MODE, dev)) {
remove(path);
return DRM_ERR_NOT_ROOT;
}
#if defined(XFree86Server)
chmod(path, xf86ConfigDRI.mode ? xf86ConfigDRI.mode : DRM_DEV_MODE);
chown(path, DRM_DEV_UID,
xf86ConfigDRI.group ? xf86ConfigDRI.group : DRM_DEV_GID);
#endif
#if defined(DRM_USE_MALLOC)
chmod(path, DRM_DEV_MODE);
chown(path, DRM_DEV_UID, DRM_DEV_GID);
#endif
return drm_open(path);
}
/* drmOpenDRM returns a file descriptor for the main /dev/drm control
device. The entry in /dev is created if necessary (and if root). A
file descriptor is returned. On error, the return value is negative. */
int drmOpenDRM(void)
{
return drmOpen(DRM_NAME, NULL);
}
/* drmClose closes the file descriptor returned from drmOpen. */
int drmCloseDRM(int fd)
{
return close(fd);
}
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, 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/drm. */
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 drmFreeVersionList(drmListPtr list)
{
int i;
if (!list) return;
if (list->version) {
for (i = 0; i < list->count; i++) {
if (list->version[i].name) drmFree(list->version[i].name);
if (list->version[i].date) drmFree(list->version[i].date);
if (list->version[i].desc) drmFree(list->version[i].desc);
}
drmFree(list->version);
}
if (list->capability) drmFree(list->capability);
drmFree(list);
}
static void drmFreeKernelVersionList(drm_list_t *list)
{
int i;
if (!list) return;
if (list->version) {
for (i = 0; i < list->count; i++) {
if (list->version[i].name) drmFree(list->version[i].name);
if (list->version[i].date) drmFree(list->version[i].date);
if (list->version[i].desc) drmFree(list->version[i].desc);
}
drmFree(list->version);
}
drmFree(list);
}
/* drmList obtains a list of all drivers and capabilities via an ioctl. */
drmListPtr drmGetVersionList(int fd)
{
drmListPtr retval;
drm_list_t *list = drmMalloc(sizeof(*list));
int i;
list->count = 0;
/* First, get the count */
if (ioctl(fd, DRM_IOCTL_LIST, list)) {
drmFreeKernelVersionList(list);
return NULL;
}
/* Next, get the version sizes */
for (i = 0; i < list->count; i++) {
list->version
= drmMalloc(list->count * sizeof(*list->version));
list->version[i].name_len = 0;
list->version[i].name = NULL;
list->version[i].date_len = 0;
list->version[i].date = NULL;
list->version[i].desc_len = 0;
list->version[i].desc = NULL;
}
if (ioctl(fd, DRM_IOCTL_LIST, list)) {
drmFreeKernelVersionList(list);
return NULL;
}
/* Now, allocate space and get the data */
for (i = 0; i < list->count; i++) {
if (list->version[i].name_len)
list->version[i].name = drmMalloc(list->version[i].name_len + 1);
if (list->version[i].date_len)
list->version[i].date = drmMalloc(list->version[i].date_len + 1);
if (list->version[i].desc_len)
list->version[i].desc = drmMalloc(list->version[i].desc_len + 1);
}
if (ioctl(fd, DRM_IOCTL_LIST, list)) {
drmFreeKernelVersionList(list);
return NULL;
}
/* The results might not be null-terminated
strings, so terminate them. */
for (i = 0; i < list->count; i++) {
if (list->version[i].name_len)
list->version[i].name[list->version[i].name_len] = '\0';
if (list->version[i].date_len)
list->version[i].date[list->version[i].date_len] = '\0';
if (list->version[i].desc_len)
list->version[i].desc[list->version[i].desc_len] = '\0';
}
/* Now, copy it all back into the
client-visible data structure... */
retval = drmMalloc(sizeof(*retval));
retval->count = list->count;
retval->version = drmMalloc(list->count * sizeof(*retval->version));
retval->capability = drmMalloc(list->count * sizeof(*retval->capability));
for (i = 0; i < list->count; i++) {
drmCopyVersion(&retval->version[i], &list->version[i]);
}
drmFreeKernelVersionList(list);
return retval;
}
int drmCreateSub(int fd, const char *name, const char *busid)
{
drm_request_t request;
request.device_name = name;
request.device_busid = busid;
if (ioctl(fd, DRM_IOCTL_CREATE, &request)) {
return -errno;
}
return 0;
}
int drmDestroySub(int fd, const char *busid)
{
drm_request_t request;
request.device_busid = busid;
request.device_major = drmGetMajor();
request.device_minor = drmGetMinor(NULL, busid);
if (ioctl(fd, DRM_IOCTL_DESTROY, &request)) {
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;
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, int flags)
{
drm_buf_desc_t request;
request.count = count;
request.size = size;
request.low_mark = 0;
request.high_mark = 0;
request.flags = flags;
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 drmOpenSub(const char *busid)
{
return drmOpen(NULL, busid);
}
int drmCloseSub(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)
{
if (fd < 0) return -EINVAL;
*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;
}
int drmDMA(int fd, drmDMAReqPtr request)
{
drm_dma_t dma;
/* 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;
if (ioctl(fd, DRM_IOCTL_DMA, &dma)) return -errno;
request->granted_count = dma.granted_count;
return 0;
}
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 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 drmCtlAddCommand(int fd, drmCtlDesc desc, int count, int *inst)
{
drm_control_t ctl;
ctl.func = DRM_ADD_COMMAND;
ctl.irq = 0;
ctl.count = count;
ctl.inst = inst;
switch (desc) {
case DRM_IH_PRE_INST: ctl.desc = _DRM_IH_PRE_INST; break;
case DRM_IH_POST_INST: ctl.desc = _DRM_IH_POST_INST; break;
case DRM_IH_SERVICE: ctl.desc = _DRM_IH_SERVICE; break;
case DRM_IH_PRE_UNINST: ctl.desc = _DRM_IH_PRE_UNINST; break;
case DRM_IH_POST_UNINST: ctl.desc = _DRM_IH_POST_UNINST; break;
case DRM_DMA_DISPATCH: ctl.desc = _DRM_DMA_DISPATCH; break;
case DRM_DMA_READY: ctl.desc = _DRM_DMA_READY; break;
case DRM_DMA_IS_READY: ctl.desc = _DRM_DMA_IS_READY; break;
case DRM_DMA_QUIESCENT: ctl.desc = _DRM_DMA_QUIESCENT; break;
default:
return -EINVAL;
}
if (ioctl(fd, DRM_IOCTL_CONTROL, &ctl)) return -errno;
return 0;
}
int drmCtlRemoveCommands(int fd)
{
drm_control_t ctl;
drm_desc_t i;
for (i = 0; i < DRM_DESC_MAX; i++) {
ctl.func = DRM_RM_COMMAND;
ctl.desc = i;
ctl.irq = 0;
ctl.count = 0;
ctl.inst = NULL;
ioctl(fd, DRM_IOCTL_CONTROL, &ctl);
}
return 0;
}
int drmCtlInstHandler(int fd, int irq)
{
drm_control_t ctl;
ctl.func = DRM_INST_HANDLER;
ctl.desc = 0; /* unused */
ctl.irq = irq;
ctl.count = 0;
ctl.inst = NULL;
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.desc = 0; /* unused */
ctl.irq = 0;
ctl.count = 0;
ctl.inst = NULL;
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)
{
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);
}
int drmRemoveSIGIOHandler(int fd)
{
drmHashEntry *entry = drmGetEntry(fd);
entry->f = NULL;
return xf86RemoveSIGIOHandler(fd);
}
#endif