3 * User-level interface to DRM device
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Kevin E. Martin <martin@valinux.com>
10 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
12 * All Rights Reserved.
14 * Permission is hereby granted, free of charge, to any person obtaining a
15 * copy of this software and associated documentation files (the "Software"),
16 * to deal in the Software without restriction, including without limitation
17 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
18 * and/or sell copies of the Software, and to permit persons to whom the
19 * Software is furnished to do so, subject to the following conditions:
21 * The above copyright notice and this permission notice (including the next
22 * paragraph) shall be included in all copies or substantial portions of the
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
27 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
28 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
29 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
30 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
31 * DEALINGS IN THE SOFTWARE.
47 #include <sys/types.h>
49 #define stat_t struct stat
50 #include <sys/ioctl.h>
54 /* Not all systems have MAP_FAILED defined */
56 #define MAP_FAILED ((void *)-1)
62 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
75 #define DRM_MAJOR 226 /* Linux */
79 * This definition needs to be changed on some systems if dev_t is a structure.
80 * If there is a header file we can get it from, there would be best.
83 #define makedev(x,y) ((dev_t)(((x) << 8) | (y)))
86 #define DRM_MSG_VERBOSITY 3
88 #define DRM_NODE_CONTROL 0
89 #define DRM_NODE_RENDER 1
91 static drmServerInfoPtr drm_server_info;
93 void drmSetServerInfo(drmServerInfoPtr info)
95 drm_server_info = info;
99 * Output a message to stderr.
101 * \param format printf() like format string.
104 * This function is a wrapper around vfprintf().
107 static int DRM_PRINTFLIKE(1, 0)
108 drmDebugPrint(const char *format, va_list ap)
110 return vfprintf(stderr, format, ap);
113 typedef int DRM_PRINTFLIKE(1, 0) (*debug_msg_func_t)(const char *format,
116 static debug_msg_func_t drm_debug_print = drmDebugPrint;
119 drmMsg(const char *format, ...)
123 if (((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) || drm_server_info)
125 va_start(ap, format);
126 if (drm_server_info) {
127 drm_server_info->debug_print(format,ap);
129 drm_debug_print(format, ap);
136 drmSetDebugMsgFunction(debug_msg_func_t debug_msg_ptr)
138 drm_debug_print = debug_msg_ptr;
141 static void *drmHashTable = NULL; /* Context switch callbacks */
143 void *drmGetHashTable(void)
148 void *drmMalloc(int size)
151 if ((pt = malloc(size)))
156 void drmFree(void *pt)
163 * Call ioctl, restarting if it is interupted
166 drmIoctl(int fd, unsigned long request, void *arg)
171 ret = ioctl(fd, request, arg);
172 } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
176 static unsigned long drmGetKeyFromFd(int fd)
185 drmHashEntry *drmGetEntry(int fd)
187 unsigned long key = drmGetKeyFromFd(fd);
192 drmHashTable = drmHashCreate();
194 if (drmHashLookup(drmHashTable, key, &value)) {
195 entry = drmMalloc(sizeof(*entry));
198 entry->tagTable = drmHashCreate();
199 drmHashInsert(drmHashTable, key, entry);
207 * Compare two busid strings
212 * \return 1 if matched.
215 * This function compares two bus ID strings. It understands the older
216 * PCI:b:d:f format and the newer pci:oooo:bb:dd.f format. In the format, o is
217 * domain, b is bus, d is device, f is function.
219 static int drmMatchBusID(const char *id1, const char *id2, int pci_domain_ok)
221 /* First, check if the IDs are exactly the same */
222 if (strcasecmp(id1, id2) == 0)
225 /* Try to match old/new-style PCI bus IDs. */
226 if (strncasecmp(id1, "pci", 3) == 0) {
227 unsigned int o1, b1, d1, f1;
228 unsigned int o2, b2, d2, f2;
231 ret = sscanf(id1, "pci:%04x:%02x:%02x.%u", &o1, &b1, &d1, &f1);
234 ret = sscanf(id1, "PCI:%u:%u:%u", &b1, &d1, &f1);
239 ret = sscanf(id2, "pci:%04x:%02x:%02x.%u", &o2, &b2, &d2, &f2);
242 ret = sscanf(id2, "PCI:%u:%u:%u", &b2, &d2, &f2);
247 /* If domains aren't properly supported by the kernel interface,
248 * just ignore them, which sucks less than picking a totally random
249 * card with "open by name"
254 if ((o1 != o2) || (b1 != b2) || (d1 != d2) || (f1 != f2))
263 * Handles error checking for chown call.
265 * \param path to file.
266 * \param id of the new owner.
267 * \param id of the new group.
269 * \return zero if success or -1 if failure.
272 * Checks for failure. If failure was caused by signal call chown again.
273 * If any other failure happened then it will output error mesage using
276 static int chown_check_return(const char *path, uid_t owner, gid_t group)
281 rv = chown(path, owner, group);
282 } while (rv != 0 && errno == EINTR);
287 drmMsg("Failed to change owner or group for file %s! %d: %s\n",
288 path, errno, strerror(errno));
293 * Open the DRM device, creating it if necessary.
295 * \param dev major and minor numbers of the device.
296 * \param minor minor number of the device.
298 * \return a file descriptor on success, or a negative value on error.
301 * Assembles the device name from \p minor and opens it, creating the device
302 * special file node with the major and minor numbers specified by \p dev and
303 * parent directory if necessary and was called by root.
305 static int drmOpenDevice(long dev, int minor, int type)
310 mode_t devmode = DRM_DEV_MODE, serv_mode;
311 int isroot = !geteuid();
312 uid_t user = DRM_DEV_UID;
313 gid_t group = DRM_DEV_GID, serv_group;
315 sprintf(buf, type ? DRM_DEV_NAME : DRM_CONTROL_DEV_NAME, DRM_DIR_NAME, minor);
316 drmMsg("drmOpenDevice: node name is %s\n", buf);
318 if (drm_server_info) {
319 drm_server_info->get_perms(&serv_group, &serv_mode);
320 devmode = serv_mode ? serv_mode : DRM_DEV_MODE;
321 devmode &= ~(S_IXUSR|S_IXGRP|S_IXOTH);
322 group = (serv_group >= 0) ? serv_group : DRM_DEV_GID;
326 if (stat(DRM_DIR_NAME, &st)) {
328 return DRM_ERR_NOT_ROOT;
329 mkdir(DRM_DIR_NAME, DRM_DEV_DIRMODE);
330 chown_check_return(DRM_DIR_NAME, 0, 0); /* root:root */
331 chmod(DRM_DIR_NAME, DRM_DEV_DIRMODE);
334 /* Check if the device node exists and create it if necessary. */
335 if (stat(buf, &st)) {
337 return DRM_ERR_NOT_ROOT;
339 mknod(buf, S_IFCHR | devmode, dev);
342 if (drm_server_info) {
343 chown_check_return(buf, user, group);
347 /* if we modprobed then wait for udev */
351 if (stat(DRM_DIR_NAME, &st)) {
355 if (udev_count == 50)
360 if (stat(buf, &st)) {
364 if (udev_count == 50)
371 fd = open(buf, O_RDWR, 0);
372 drmMsg("drmOpenDevice: open result is %d, (%s)\n",
373 fd, fd < 0 ? strerror(errno) : "OK");
378 /* Check if the device node is not what we expect it to be, and recreate it
379 * and try again if so.
381 if (st.st_rdev != dev) {
383 return DRM_ERR_NOT_ROOT;
385 mknod(buf, S_IFCHR | devmode, dev);
386 if (drm_server_info) {
387 chown_check_return(buf, user, group);
391 fd = open(buf, O_RDWR, 0);
392 drmMsg("drmOpenDevice: open result is %d, (%s)\n",
393 fd, fd < 0 ? strerror(errno) : "OK");
397 drmMsg("drmOpenDevice: Open failed\n");
405 * Open the DRM device
407 * \param minor device minor number.
408 * \param create allow to create the device if set.
410 * \return a file descriptor on success, or a negative value on error.
413 * Calls drmOpenDevice() if \p create is set, otherwise assembles the device
414 * name from \p minor and opens it.
416 static int drmOpenMinor(int minor, int create, int type)
422 return drmOpenDevice(makedev(DRM_MAJOR, minor), minor, type);
424 sprintf(buf, type ? DRM_DEV_NAME : DRM_CONTROL_DEV_NAME, DRM_DIR_NAME, minor);
425 if ((fd = open(buf, O_RDWR, 0)) >= 0)
432 * Determine whether the DRM kernel driver has been loaded.
434 * \return 1 if the DRM driver is loaded, 0 otherwise.
437 * Determine the presence of the kernel driver by attempting to open the 0
438 * minor and get version information. For backward compatibility with older
439 * Linux implementations, /proc/dri is also checked.
441 int drmAvailable(void)
443 drmVersionPtr version;
447 if ((fd = drmOpenMinor(0, 1, DRM_NODE_RENDER)) < 0) {
449 /* Try proc for backward Linux compatibility */
450 if (!access("/proc/dri/0", R_OK))
456 if ((version = drmGetVersion(fd))) {
458 drmFreeVersion(version);
467 * Open the device by bus ID.
469 * \param busid bus ID.
471 * \return a file descriptor on success, or a negative value on error.
474 * This function attempts to open every possible minor (up to DRM_MAX_MINOR),
475 * comparing the device bus ID with the one supplied.
477 * \sa drmOpenMinor() and drmGetBusid().
479 static int drmOpenByBusid(const char *busid)
481 int i, pci_domain_ok = 1;
486 drmMsg("drmOpenByBusid: Searching for BusID %s\n", busid);
487 for (i = 0; i < DRM_MAX_MINOR; i++) {
488 fd = drmOpenMinor(i, 1, DRM_NODE_RENDER);
489 drmMsg("drmOpenByBusid: drmOpenMinor returns %d\n", fd);
491 /* We need to try for 1.4 first for proper PCI domain support
492 * and if that fails, we know the kernel is busted
496 sv.drm_dd_major = -1; /* Don't care */
497 sv.drm_dd_minor = -1; /* Don't care */
498 if (drmSetInterfaceVersion(fd, &sv)) {
504 sv.drm_dd_major = -1; /* Don't care */
505 sv.drm_dd_minor = -1; /* Don't care */
506 drmMsg("drmOpenByBusid: Interface 1.4 failed, trying 1.1\n");
507 drmSetInterfaceVersion(fd, &sv);
509 buf = drmGetBusid(fd);
510 drmMsg("drmOpenByBusid: drmGetBusid reports %s\n", buf);
511 if (buf && drmMatchBusID(buf, busid, pci_domain_ok)) {
525 * Open the device by name.
527 * \param name driver name.
529 * \return a file descriptor on success, or a negative value on error.
532 * This function opens the first minor number that matches the driver name and
533 * isn't already in use. If it's in use it then it will already have a bus ID
536 * \sa drmOpenMinor(), drmGetVersion() and drmGetBusid().
538 static int drmOpenByName(const char *name)
542 drmVersionPtr version;
546 * Open the first minor number that matches the driver name and isn't
547 * already in use. If it's in use it will have a busid assigned already.
549 for (i = 0; i < DRM_MAX_MINOR; i++) {
550 if ((fd = drmOpenMinor(i, 1, DRM_NODE_RENDER)) >= 0) {
551 if ((version = drmGetVersion(fd))) {
552 if (!strcmp(version->name, name)) {
553 drmFreeVersion(version);
554 id = drmGetBusid(fd);
555 drmMsg("drmGetBusid returned '%s'\n", id ? id : "NULL");
564 drmFreeVersion(version);
572 /* Backward-compatibility /proc support */
573 for (i = 0; i < 8; i++) {
574 char proc_name[64], buf[512];
575 char *driver, *pt, *devstring;
578 sprintf(proc_name, "/proc/dri/%d/name", i);
579 if ((fd = open(proc_name, 0, 0)) >= 0) {
580 retcode = read(fd, buf, sizeof(buf)-1);
583 buf[retcode-1] = '\0';
584 for (driver = pt = buf; *pt && *pt != ' '; ++pt)
586 if (*pt) { /* Device is next */
588 if (!strcmp(driver, name)) { /* Match */
589 for (devstring = ++pt; *pt && *pt != ' '; ++pt)
591 if (*pt) { /* Found busid */
592 return drmOpenByBusid(++pt);
593 } else { /* No busid */
594 return drmOpenDevice(strtol(devstring, NULL, 0),i, DRM_NODE_RENDER);
608 * Open the DRM device.
610 * Looks up the specified name and bus ID, and opens the device found. The
611 * entry in /dev/dri is created if necessary and if called by root.
613 * \param name driver name. Not referenced if bus ID is supplied.
614 * \param busid bus ID. Zero if not known.
616 * \return a file descriptor on success, or a negative value on error.
619 * It calls drmOpenByBusid() if \p busid is specified or drmOpenByName()
622 int drmOpen(const char *name, const char *busid)
624 if (!drmAvailable() && name != NULL && drm_server_info) {
625 /* try to load the kernel */
626 if (!drm_server_info->load_module(name)) {
627 drmMsg("[drm] failed to load kernel module \"%s\"\n", name);
633 int fd = drmOpenByBusid(busid);
639 return drmOpenByName(name);
644 int drmOpenControl(int minor)
646 return drmOpenMinor(minor, 0, DRM_NODE_CONTROL);
650 * Free the version information returned by drmGetVersion().
652 * \param v pointer to the version information.
655 * It frees the memory pointed by \p %v as well as all the non-null strings
658 void drmFreeVersion(drmVersionPtr v)
670 * Free the non-public version information returned by the kernel.
672 * \param v pointer to the version information.
675 * Used by drmGetVersion() to free the memory pointed by \p %v as well as all
676 * the non-null strings pointers in it.
678 static void drmFreeKernelVersion(drm_version_t *v)
690 * Copy version information.
692 * \param d destination pointer.
693 * \param s source pointer.
696 * Used by drmGetVersion() to translate the information returned by the ioctl
697 * interface in a private structure into the public structure counterpart.
699 static void drmCopyVersion(drmVersionPtr d, const drm_version_t *s)
701 d->version_major = s->version_major;
702 d->version_minor = s->version_minor;
703 d->version_patchlevel = s->version_patchlevel;
704 d->name_len = s->name_len;
705 d->name = strdup(s->name);
706 d->date_len = s->date_len;
707 d->date = strdup(s->date);
708 d->desc_len = s->desc_len;
709 d->desc = strdup(s->desc);
714 * Query the driver version information.
716 * \param fd file descriptor.
718 * \return pointer to a drmVersion structure which should be freed with
721 * \note Similar information is available via /proc/dri.
724 * It gets the version information via successive DRM_IOCTL_VERSION ioctls,
725 * first with zeros to get the string lengths, and then the actually strings.
726 * It also null-terminates them since they might not be already.
728 drmVersionPtr drmGetVersion(int fd)
730 drmVersionPtr retval;
731 drm_version_t *version = drmMalloc(sizeof(*version));
733 version->name_len = 0;
734 version->name = NULL;
735 version->date_len = 0;
736 version->date = NULL;
737 version->desc_len = 0;
738 version->desc = NULL;
740 if (drmIoctl(fd, DRM_IOCTL_VERSION, version)) {
741 drmFreeKernelVersion(version);
745 if (version->name_len)
746 version->name = drmMalloc(version->name_len + 1);
747 if (version->date_len)
748 version->date = drmMalloc(version->date_len + 1);
749 if (version->desc_len)
750 version->desc = drmMalloc(version->desc_len + 1);
752 if (drmIoctl(fd, DRM_IOCTL_VERSION, version)) {
753 drmMsg("DRM_IOCTL_VERSION: %s\n", strerror(errno));
754 drmFreeKernelVersion(version);
758 /* The results might not be null-terminated strings, so terminate them. */
759 if (version->name_len) version->name[version->name_len] = '\0';
760 if (version->date_len) version->date[version->date_len] = '\0';
761 if (version->desc_len) version->desc[version->desc_len] = '\0';
763 retval = drmMalloc(sizeof(*retval));
764 drmCopyVersion(retval, version);
765 drmFreeKernelVersion(version);
771 * Get version information for the DRM user space library.
773 * This version number is driver independent.
775 * \param fd file descriptor.
777 * \return version information.
780 * This function allocates and fills a drm_version structure with a hard coded
783 drmVersionPtr drmGetLibVersion(int fd)
785 drm_version_t *version = drmMalloc(sizeof(*version));
788 * NOTE THIS MUST NOT GO ABOVE VERSION 1.X due to drivers needing it
789 * revision 1.0.x = original DRM interface with no drmGetLibVersion
790 * entry point and many drm<Device> extensions
791 * revision 1.1.x = added drmCommand entry points for device extensions
792 * added drmGetLibVersion to identify libdrm.a version
793 * revision 1.2.x = added drmSetInterfaceVersion
794 * modified drmOpen to handle both busid and name
795 * revision 1.3.x = added server + memory manager
797 version->version_major = 1;
798 version->version_minor = 3;
799 version->version_patchlevel = 0;
801 return (drmVersionPtr)version;
804 int drmGetCap(int fd, uint64_t capability, uint64_t *value)
806 struct drm_get_cap cap = { capability, 0 };
809 ret = drmIoctl(fd, DRM_IOCTL_GET_CAP, &cap);
817 int drmSetClientCap(int fd, uint64_t capability, uint64_t value)
819 struct drm_set_client_cap cap = { capability, value };
821 return drmIoctl(fd, DRM_IOCTL_SET_CLIENT_CAP, &cap);
825 * Free the bus ID information.
827 * \param busid bus ID information string as given by drmGetBusid().
830 * This function is just frees the memory pointed by \p busid.
832 void drmFreeBusid(const char *busid)
834 drmFree((void *)busid);
839 * Get the bus ID of the device.
841 * \param fd file descriptor.
843 * \return bus ID string.
846 * This function gets the bus ID via successive DRM_IOCTL_GET_UNIQUE ioctls to
847 * get the string length and data, passing the arguments in a drm_unique
850 char *drmGetBusid(int fd)
857 if (drmIoctl(fd, DRM_IOCTL_GET_UNIQUE, &u))
859 u.unique = drmMalloc(u.unique_len + 1);
860 if (drmIoctl(fd, DRM_IOCTL_GET_UNIQUE, &u))
862 u.unique[u.unique_len] = '\0';
869 * Set the bus ID of the device.
871 * \param fd file descriptor.
872 * \param busid bus ID string.
874 * \return zero on success, negative on failure.
877 * This function is a wrapper around the DRM_IOCTL_SET_UNIQUE ioctl, passing
878 * the arguments in a drm_unique structure.
880 int drmSetBusid(int fd, const char *busid)
884 u.unique = (char *)busid;
885 u.unique_len = strlen(busid);
887 if (drmIoctl(fd, DRM_IOCTL_SET_UNIQUE, &u)) {
893 int drmGetMagic(int fd, drm_magic_t * magic)
898 if (drmIoctl(fd, DRM_IOCTL_GET_MAGIC, &auth))
904 int drmAuthMagic(int fd, drm_magic_t magic)
909 if (drmIoctl(fd, DRM_IOCTL_AUTH_MAGIC, &auth))
915 * Specifies a range of memory that is available for mapping by a
918 * \param fd file descriptor.
919 * \param offset usually the physical address. The actual meaning depends of
920 * the \p type parameter. See below.
921 * \param size of the memory in bytes.
922 * \param type type of the memory to be mapped.
923 * \param flags combination of several flags to modify the function actions.
924 * \param handle will be set to a value that may be used as the offset
925 * parameter for mmap().
927 * \return zero on success or a negative value on error.
929 * \par Mapping the frame buffer
930 * For the frame buffer
931 * - \p offset will be the physical address of the start of the frame buffer,
932 * - \p size will be the size of the frame buffer in bytes, and
933 * - \p type will be DRM_FRAME_BUFFER.
936 * The area mapped will be uncached. If MTRR support is available in the
937 * kernel, the frame buffer area will be set to write combining.
939 * \par Mapping the MMIO register area
940 * For the MMIO register area,
941 * - \p offset will be the physical address of the start of the register area,
942 * - \p size will be the size of the register area bytes, and
943 * - \p type will be DRM_REGISTERS.
945 * The area mapped will be uncached.
947 * \par Mapping the SAREA
949 * - \p offset will be ignored and should be set to zero,
950 * - \p size will be the desired size of the SAREA in bytes,
951 * - \p type will be DRM_SHM.
954 * A shared memory area of the requested size will be created and locked in
955 * kernel memory. This area may be mapped into client-space by using the handle
958 * \note May only be called by root.
961 * This function is a wrapper around the DRM_IOCTL_ADD_MAP ioctl, passing
962 * the arguments in a drm_map structure.
964 int drmAddMap(int fd, drm_handle_t offset, drmSize size, drmMapType type,
965 drmMapFlags flags, drm_handle_t *handle)
974 if (drmIoctl(fd, DRM_IOCTL_ADD_MAP, &map))
977 *handle = (drm_handle_t)(uintptr_t)map.handle;
981 int drmRmMap(int fd, drm_handle_t handle)
985 map.handle = (void *)(uintptr_t)handle;
987 if(drmIoctl(fd, DRM_IOCTL_RM_MAP, &map))
993 * Make buffers available for DMA transfers.
995 * \param fd file descriptor.
996 * \param count number of buffers.
997 * \param size size of each buffer.
998 * \param flags buffer allocation flags.
999 * \param agp_offset offset in the AGP aperture
1001 * \return number of buffers allocated, negative on error.
1004 * This function is a wrapper around DRM_IOCTL_ADD_BUFS ioctl.
1008 int drmAddBufs(int fd, int count, int size, drmBufDescFlags flags,
1011 drm_buf_desc_t request;
1013 request.count = count;
1014 request.size = size;
1015 request.low_mark = 0;
1016 request.high_mark = 0;
1017 request.flags = flags;
1018 request.agp_start = agp_offset;
1020 if (drmIoctl(fd, DRM_IOCTL_ADD_BUFS, &request))
1022 return request.count;
1025 int drmMarkBufs(int fd, double low, double high)
1027 drm_buf_info_t info;
1033 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info))
1039 if (!(info.list = drmMalloc(info.count * sizeof(*info.list))))
1042 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info)) {
1043 int retval = -errno;
1048 for (i = 0; i < info.count; i++) {
1049 info.list[i].low_mark = low * info.list[i].count;
1050 info.list[i].high_mark = high * info.list[i].count;
1051 if (drmIoctl(fd, DRM_IOCTL_MARK_BUFS, &info.list[i])) {
1052 int retval = -errno;
1065 * \param fd file descriptor.
1066 * \param count number of buffers to free.
1067 * \param list list of buffers to be freed.
1069 * \return zero on success, or a negative value on failure.
1071 * \note This function is primarily used for debugging.
1074 * This function is a wrapper around the DRM_IOCTL_FREE_BUFS ioctl, passing
1075 * the arguments in a drm_buf_free structure.
1077 int drmFreeBufs(int fd, int count, int *list)
1079 drm_buf_free_t request;
1081 request.count = count;
1082 request.list = list;
1083 if (drmIoctl(fd, DRM_IOCTL_FREE_BUFS, &request))
1092 * \param fd file descriptor.
1095 * This function closes the file descriptor.
1097 int drmClose(int fd)
1099 unsigned long key = drmGetKeyFromFd(fd);
1100 drmHashEntry *entry = drmGetEntry(fd);
1102 drmHashDestroy(entry->tagTable);
1105 entry->tagTable = NULL;
1107 drmHashDelete(drmHashTable, key);
1115 * Map a region of memory.
1117 * \param fd file descriptor.
1118 * \param handle handle returned by drmAddMap().
1119 * \param size size in bytes. Must match the size used by drmAddMap().
1120 * \param address will contain the user-space virtual address where the mapping
1123 * \return zero on success, or a negative value on failure.
1126 * This function is a wrapper for mmap().
1128 int drmMap(int fd, drm_handle_t handle, drmSize size, drmAddressPtr address)
1130 static unsigned long pagesize_mask = 0;
1136 pagesize_mask = getpagesize() - 1;
1138 size = (size + pagesize_mask) & ~pagesize_mask;
1140 *address = drm_mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, handle);
1141 if (*address == MAP_FAILED)
1148 * Unmap mappings obtained with drmMap().
1150 * \param address address as given by drmMap().
1151 * \param size size in bytes. Must match the size used by drmMap().
1153 * \return zero on success, or a negative value on failure.
1156 * This function is a wrapper for munmap().
1158 int drmUnmap(drmAddress address, drmSize size)
1160 return drm_munmap(address, size);
1163 drmBufInfoPtr drmGetBufInfo(int fd)
1165 drm_buf_info_t info;
1166 drmBufInfoPtr retval;
1172 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info))
1176 if (!(info.list = drmMalloc(info.count * sizeof(*info.list))))
1179 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info)) {
1184 retval = drmMalloc(sizeof(*retval));
1185 retval->count = info.count;
1186 retval->list = drmMalloc(info.count * sizeof(*retval->list));
1187 for (i = 0; i < info.count; i++) {
1188 retval->list[i].count = info.list[i].count;
1189 retval->list[i].size = info.list[i].size;
1190 retval->list[i].low_mark = info.list[i].low_mark;
1191 retval->list[i].high_mark = info.list[i].high_mark;
1200 * Map all DMA buffers into client-virtual space.
1202 * \param fd file descriptor.
1204 * \return a pointer to a ::drmBufMap structure.
1206 * \note The client may not use these buffers until obtaining buffer indices
1210 * This function calls the DRM_IOCTL_MAP_BUFS ioctl and copies the returned
1211 * information about the buffers in a drm_buf_map structure into the
1212 * client-visible data structures.
1214 drmBufMapPtr drmMapBufs(int fd)
1217 drmBufMapPtr retval;
1222 bufs.virtual = NULL;
1223 if (drmIoctl(fd, DRM_IOCTL_MAP_BUFS, &bufs))
1229 if (!(bufs.list = drmMalloc(bufs.count * sizeof(*bufs.list))))
1232 if (drmIoctl(fd, DRM_IOCTL_MAP_BUFS, &bufs)) {
1237 retval = drmMalloc(sizeof(*retval));
1238 retval->count = bufs.count;
1239 retval->list = drmMalloc(bufs.count * sizeof(*retval->list));
1240 for (i = 0; i < bufs.count; i++) {
1241 retval->list[i].idx = bufs.list[i].idx;
1242 retval->list[i].total = bufs.list[i].total;
1243 retval->list[i].used = 0;
1244 retval->list[i].address = bufs.list[i].address;
1254 * Unmap buffers allocated with drmMapBufs().
1256 * \return zero on success, or negative value on failure.
1259 * Calls munmap() for every buffer stored in \p bufs and frees the
1260 * memory allocated by drmMapBufs().
1262 int drmUnmapBufs(drmBufMapPtr bufs)
1266 for (i = 0; i < bufs->count; i++) {
1267 drm_munmap(bufs->list[i].address, bufs->list[i].total);
1270 drmFree(bufs->list);
1277 #define DRM_DMA_RETRY 16
1280 * Reserve DMA buffers.
1282 * \param fd file descriptor.
1285 * \return zero on success, or a negative value on failure.
1288 * Assemble the arguments into a drm_dma structure and keeps issuing the
1289 * DRM_IOCTL_DMA ioctl until success or until maximum number of retries.
1291 int drmDMA(int fd, drmDMAReqPtr request)
1296 dma.context = request->context;
1297 dma.send_count = request->send_count;
1298 dma.send_indices = request->send_list;
1299 dma.send_sizes = request->send_sizes;
1300 dma.flags = request->flags;
1301 dma.request_count = request->request_count;
1302 dma.request_size = request->request_size;
1303 dma.request_indices = request->request_list;
1304 dma.request_sizes = request->request_sizes;
1305 dma.granted_count = 0;
1308 ret = ioctl( fd, DRM_IOCTL_DMA, &dma );
1309 } while ( ret && errno == EAGAIN && i++ < DRM_DMA_RETRY );
1312 request->granted_count = dma.granted_count;
1321 * Obtain heavyweight hardware lock.
1323 * \param fd file descriptor.
1324 * \param context context.
1325 * \param flags flags that determine the sate of the hardware when the function
1328 * \return always zero.
1331 * This function translates the arguments into a drm_lock structure and issue
1332 * the DRM_IOCTL_LOCK ioctl until the lock is successfully acquired.
1334 int drmGetLock(int fd, drm_context_t context, drmLockFlags flags)
1338 lock.context = context;
1340 if (flags & DRM_LOCK_READY) lock.flags |= _DRM_LOCK_READY;
1341 if (flags & DRM_LOCK_QUIESCENT) lock.flags |= _DRM_LOCK_QUIESCENT;
1342 if (flags & DRM_LOCK_FLUSH) lock.flags |= _DRM_LOCK_FLUSH;
1343 if (flags & DRM_LOCK_FLUSH_ALL) lock.flags |= _DRM_LOCK_FLUSH_ALL;
1344 if (flags & DRM_HALT_ALL_QUEUES) lock.flags |= _DRM_HALT_ALL_QUEUES;
1345 if (flags & DRM_HALT_CUR_QUEUES) lock.flags |= _DRM_HALT_CUR_QUEUES;
1347 while (drmIoctl(fd, DRM_IOCTL_LOCK, &lock))
1353 * Release the hardware lock.
1355 * \param fd file descriptor.
1356 * \param context context.
1358 * \return zero on success, or a negative value on failure.
1361 * This function is a wrapper around the DRM_IOCTL_UNLOCK ioctl, passing the
1362 * argument in a drm_lock structure.
1364 int drmUnlock(int fd, drm_context_t context)
1368 lock.context = context;
1370 return drmIoctl(fd, DRM_IOCTL_UNLOCK, &lock);
1373 drm_context_t *drmGetReservedContextList(int fd, int *count)
1377 drm_context_t * retval;
1381 res.contexts = NULL;
1382 if (drmIoctl(fd, DRM_IOCTL_RES_CTX, &res))
1388 if (!(list = drmMalloc(res.count * sizeof(*list))))
1390 if (!(retval = drmMalloc(res.count * sizeof(*retval)))) {
1395 res.contexts = list;
1396 if (drmIoctl(fd, DRM_IOCTL_RES_CTX, &res))
1399 for (i = 0; i < res.count; i++)
1400 retval[i] = list[i].handle;
1407 void drmFreeReservedContextList(drm_context_t *pt)
1415 * Used by the X server during GLXContext initialization. This causes
1416 * per-context kernel-level resources to be allocated.
1418 * \param fd file descriptor.
1419 * \param handle is set on success. To be used by the client when requesting DMA
1420 * dispatch with drmDMA().
1422 * \return zero on success, or a negative value on failure.
1424 * \note May only be called by root.
1427 * This function is a wrapper around the DRM_IOCTL_ADD_CTX ioctl, passing the
1428 * argument in a drm_ctx structure.
1430 int drmCreateContext(int fd, drm_context_t *handle)
1434 ctx.flags = 0; /* Modified with functions below */
1435 if (drmIoctl(fd, DRM_IOCTL_ADD_CTX, &ctx))
1437 *handle = ctx.handle;
1441 int drmSwitchToContext(int fd, drm_context_t context)
1445 ctx.handle = context;
1446 if (drmIoctl(fd, DRM_IOCTL_SWITCH_CTX, &ctx))
1451 int drmSetContextFlags(int fd, drm_context_t context, drm_context_tFlags flags)
1456 * Context preserving means that no context switches are done between DMA
1457 * buffers from one context and the next. This is suitable for use in the
1458 * X server (which promises to maintain hardware context), or in the
1459 * client-side library when buffers are swapped on behalf of two threads.
1461 ctx.handle = context;
1463 if (flags & DRM_CONTEXT_PRESERVED)
1464 ctx.flags |= _DRM_CONTEXT_PRESERVED;
1465 if (flags & DRM_CONTEXT_2DONLY)
1466 ctx.flags |= _DRM_CONTEXT_2DONLY;
1467 if (drmIoctl(fd, DRM_IOCTL_MOD_CTX, &ctx))
1472 int drmGetContextFlags(int fd, drm_context_t context,
1473 drm_context_tFlagsPtr flags)
1477 ctx.handle = context;
1478 if (drmIoctl(fd, DRM_IOCTL_GET_CTX, &ctx))
1481 if (ctx.flags & _DRM_CONTEXT_PRESERVED)
1482 *flags |= DRM_CONTEXT_PRESERVED;
1483 if (ctx.flags & _DRM_CONTEXT_2DONLY)
1484 *flags |= DRM_CONTEXT_2DONLY;
1491 * Free any kernel-level resources allocated with drmCreateContext() associated
1494 * \param fd file descriptor.
1495 * \param handle handle given by drmCreateContext().
1497 * \return zero on success, or a negative value on failure.
1499 * \note May only be called by root.
1502 * This function is a wrapper around the DRM_IOCTL_RM_CTX ioctl, passing the
1503 * argument in a drm_ctx structure.
1505 int drmDestroyContext(int fd, drm_context_t handle)
1508 ctx.handle = handle;
1509 if (drmIoctl(fd, DRM_IOCTL_RM_CTX, &ctx))
1514 int drmCreateDrawable(int fd, drm_drawable_t *handle)
1517 if (drmIoctl(fd, DRM_IOCTL_ADD_DRAW, &draw))
1519 *handle = draw.handle;
1523 int drmDestroyDrawable(int fd, drm_drawable_t handle)
1526 draw.handle = handle;
1527 if (drmIoctl(fd, DRM_IOCTL_RM_DRAW, &draw))
1532 int drmUpdateDrawableInfo(int fd, drm_drawable_t handle,
1533 drm_drawable_info_type_t type, unsigned int num,
1536 drm_update_draw_t update;
1538 update.handle = handle;
1541 update.data = (unsigned long long)(unsigned long)data;
1543 if (drmIoctl(fd, DRM_IOCTL_UPDATE_DRAW, &update))
1550 * Acquire the AGP device.
1552 * Must be called before any of the other AGP related calls.
1554 * \param fd file descriptor.
1556 * \return zero on success, or a negative value on failure.
1559 * This function is a wrapper around the DRM_IOCTL_AGP_ACQUIRE ioctl.
1561 int drmAgpAcquire(int fd)
1563 if (drmIoctl(fd, DRM_IOCTL_AGP_ACQUIRE, NULL))
1570 * Release the AGP device.
1572 * \param fd file descriptor.
1574 * \return zero on success, or a negative value on failure.
1577 * This function is a wrapper around the DRM_IOCTL_AGP_RELEASE ioctl.
1579 int drmAgpRelease(int fd)
1581 if (drmIoctl(fd, DRM_IOCTL_AGP_RELEASE, NULL))
1590 * \param fd file descriptor.
1591 * \param mode AGP mode.
1593 * \return zero on success, or a negative value on failure.
1596 * This function is a wrapper around the DRM_IOCTL_AGP_ENABLE ioctl, passing the
1597 * argument in a drm_agp_mode structure.
1599 int drmAgpEnable(int fd, unsigned long mode)
1604 if (drmIoctl(fd, DRM_IOCTL_AGP_ENABLE, &m))
1611 * Allocate a chunk of AGP memory.
1613 * \param fd file descriptor.
1614 * \param size requested memory size in bytes. Will be rounded to page boundary.
1615 * \param type type of memory to allocate.
1616 * \param address if not zero, will be set to the physical address of the
1618 * \param handle on success will be set to a handle of the allocated memory.
1620 * \return zero on success, or a negative value on failure.
1623 * This function is a wrapper around the DRM_IOCTL_AGP_ALLOC ioctl, passing the
1624 * arguments in a drm_agp_buffer structure.
1626 int drmAgpAlloc(int fd, unsigned long size, unsigned long type,
1627 unsigned long *address, drm_handle_t *handle)
1631 *handle = DRM_AGP_NO_HANDLE;
1635 if (drmIoctl(fd, DRM_IOCTL_AGP_ALLOC, &b))
1638 *address = b.physical;
1645 * Free a chunk of AGP memory.
1647 * \param fd file descriptor.
1648 * \param handle handle to the allocated memory, as given by drmAgpAllocate().
1650 * \return zero on success, or a negative value on failure.
1653 * This function is a wrapper around the DRM_IOCTL_AGP_FREE ioctl, passing the
1654 * argument in a drm_agp_buffer structure.
1656 int drmAgpFree(int fd, drm_handle_t handle)
1662 if (drmIoctl(fd, DRM_IOCTL_AGP_FREE, &b))
1669 * Bind a chunk of AGP memory.
1671 * \param fd file descriptor.
1672 * \param handle handle to the allocated memory, as given by drmAgpAllocate().
1673 * \param offset offset in bytes. It will round to page boundary.
1675 * \return zero on success, or a negative value on failure.
1678 * This function is a wrapper around the DRM_IOCTL_AGP_BIND ioctl, passing the
1679 * argument in a drm_agp_binding structure.
1681 int drmAgpBind(int fd, drm_handle_t handle, unsigned long offset)
1683 drm_agp_binding_t b;
1687 if (drmIoctl(fd, DRM_IOCTL_AGP_BIND, &b))
1694 * Unbind a chunk of AGP memory.
1696 * \param fd file descriptor.
1697 * \param handle handle to the allocated memory, as given by drmAgpAllocate().
1699 * \return zero on success, or a negative value on failure.
1702 * This function is a wrapper around the DRM_IOCTL_AGP_UNBIND ioctl, passing
1703 * the argument in a drm_agp_binding structure.
1705 int drmAgpUnbind(int fd, drm_handle_t handle)
1707 drm_agp_binding_t b;
1711 if (drmIoctl(fd, DRM_IOCTL_AGP_UNBIND, &b))
1718 * Get AGP driver major version number.
1720 * \param fd file descriptor.
1722 * \return major version number on success, or a negative value on failure..
1725 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1726 * necessary information in a drm_agp_info structure.
1728 int drmAgpVersionMajor(int fd)
1732 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1734 return i.agp_version_major;
1739 * Get AGP driver minor version number.
1741 * \param fd file descriptor.
1743 * \return minor version number on success, or a negative value on failure.
1746 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1747 * necessary information in a drm_agp_info structure.
1749 int drmAgpVersionMinor(int fd)
1753 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1755 return i.agp_version_minor;
1762 * \param fd file descriptor.
1764 * \return mode on success, or zero on failure.
1767 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1768 * necessary information in a drm_agp_info structure.
1770 unsigned long drmAgpGetMode(int fd)
1774 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1781 * Get AGP aperture base.
1783 * \param fd file descriptor.
1785 * \return aperture base on success, zero on failure.
1788 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1789 * necessary information in a drm_agp_info structure.
1791 unsigned long drmAgpBase(int fd)
1795 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1797 return i.aperture_base;
1802 * Get AGP aperture size.
1804 * \param fd file descriptor.
1806 * \return aperture size on success, zero on failure.
1809 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1810 * necessary information in a drm_agp_info structure.
1812 unsigned long drmAgpSize(int fd)
1816 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1818 return i.aperture_size;
1823 * Get used AGP memory.
1825 * \param fd file descriptor.
1827 * \return memory used on success, or zero on failure.
1830 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1831 * necessary information in a drm_agp_info structure.
1833 unsigned long drmAgpMemoryUsed(int fd)
1837 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1839 return i.memory_used;
1844 * Get available AGP memory.
1846 * \param fd file descriptor.
1848 * \return memory available on success, or zero on failure.
1851 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1852 * necessary information in a drm_agp_info structure.
1854 unsigned long drmAgpMemoryAvail(int fd)
1858 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1860 return i.memory_allowed;
1865 * Get hardware vendor ID.
1867 * \param fd file descriptor.
1869 * \return vendor ID on success, or zero on failure.
1872 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1873 * necessary information in a drm_agp_info structure.
1875 unsigned int drmAgpVendorId(int fd)
1879 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1886 * Get hardware device ID.
1888 * \param fd file descriptor.
1890 * \return zero on success, or zero on failure.
1893 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1894 * necessary information in a drm_agp_info structure.
1896 unsigned int drmAgpDeviceId(int fd)
1900 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1905 int drmScatterGatherAlloc(int fd, unsigned long size, drm_handle_t *handle)
1907 drm_scatter_gather_t sg;
1912 if (drmIoctl(fd, DRM_IOCTL_SG_ALLOC, &sg))
1914 *handle = sg.handle;
1918 int drmScatterGatherFree(int fd, drm_handle_t handle)
1920 drm_scatter_gather_t sg;
1924 if (drmIoctl(fd, DRM_IOCTL_SG_FREE, &sg))
1932 * \param fd file descriptor.
1933 * \param vbl pointer to a drmVBlank structure.
1935 * \return zero on success, or a negative value on failure.
1938 * This function is a wrapper around the DRM_IOCTL_WAIT_VBLANK ioctl.
1940 int drmWaitVBlank(int fd, drmVBlankPtr vbl)
1942 struct timespec timeout, cur;
1945 ret = clock_gettime(CLOCK_MONOTONIC, &timeout);
1947 fprintf(stderr, "clock_gettime failed: %s\n", strerror(errno));
1953 ret = ioctl(fd, DRM_IOCTL_WAIT_VBLANK, vbl);
1954 vbl->request.type &= ~DRM_VBLANK_RELATIVE;
1955 if (ret && errno == EINTR) {
1956 clock_gettime(CLOCK_MONOTONIC, &cur);
1957 /* Timeout after 1s */
1958 if (cur.tv_sec > timeout.tv_sec + 1 ||
1959 (cur.tv_sec == timeout.tv_sec && cur.tv_nsec >=
1966 } while (ret && errno == EINTR);
1972 int drmError(int err, const char *label)
1975 case DRM_ERR_NO_DEVICE:
1976 fprintf(stderr, "%s: no device\n", label);
1978 case DRM_ERR_NO_ACCESS:
1979 fprintf(stderr, "%s: no access\n", label);
1981 case DRM_ERR_NOT_ROOT:
1982 fprintf(stderr, "%s: not root\n", label);
1984 case DRM_ERR_INVALID:
1985 fprintf(stderr, "%s: invalid args\n", label);
1990 fprintf( stderr, "%s: error %d (%s)\n", label, err, strerror(err) );
1998 * Install IRQ handler.
2000 * \param fd file descriptor.
2001 * \param irq IRQ number.
2003 * \return zero on success, or a negative value on failure.
2006 * This function is a wrapper around the DRM_IOCTL_CONTROL ioctl, passing the
2007 * argument in a drm_control structure.
2009 int drmCtlInstHandler(int fd, int irq)
2013 ctl.func = DRM_INST_HANDLER;
2015 if (drmIoctl(fd, DRM_IOCTL_CONTROL, &ctl))
2022 * Uninstall IRQ handler.
2024 * \param fd file descriptor.
2026 * \return zero on success, or a negative value on failure.
2029 * This function is a wrapper around the DRM_IOCTL_CONTROL ioctl, passing the
2030 * argument in a drm_control structure.
2032 int drmCtlUninstHandler(int fd)
2036 ctl.func = DRM_UNINST_HANDLER;
2038 if (drmIoctl(fd, DRM_IOCTL_CONTROL, &ctl))
2043 int drmFinish(int fd, int context, drmLockFlags flags)
2047 lock.context = context;
2049 if (flags & DRM_LOCK_READY) lock.flags |= _DRM_LOCK_READY;
2050 if (flags & DRM_LOCK_QUIESCENT) lock.flags |= _DRM_LOCK_QUIESCENT;
2051 if (flags & DRM_LOCK_FLUSH) lock.flags |= _DRM_LOCK_FLUSH;
2052 if (flags & DRM_LOCK_FLUSH_ALL) lock.flags |= _DRM_LOCK_FLUSH_ALL;
2053 if (flags & DRM_HALT_ALL_QUEUES) lock.flags |= _DRM_HALT_ALL_QUEUES;
2054 if (flags & DRM_HALT_CUR_QUEUES) lock.flags |= _DRM_HALT_CUR_QUEUES;
2055 if (drmIoctl(fd, DRM_IOCTL_FINISH, &lock))
2061 * Get IRQ from bus ID.
2063 * \param fd file descriptor.
2064 * \param busnum bus number.
2065 * \param devnum device number.
2066 * \param funcnum function number.
2068 * \return IRQ number on success, or a negative value on failure.
2071 * This function is a wrapper around the DRM_IOCTL_IRQ_BUSID ioctl, passing the
2072 * arguments in a drm_irq_busid structure.
2074 int drmGetInterruptFromBusID(int fd, int busnum, int devnum, int funcnum)
2080 p.funcnum = funcnum;
2081 if (drmIoctl(fd, DRM_IOCTL_IRQ_BUSID, &p))
2086 int drmAddContextTag(int fd, drm_context_t context, void *tag)
2088 drmHashEntry *entry = drmGetEntry(fd);
2090 if (drmHashInsert(entry->tagTable, context, tag)) {
2091 drmHashDelete(entry->tagTable, context);
2092 drmHashInsert(entry->tagTable, context, tag);
2097 int drmDelContextTag(int fd, drm_context_t context)
2099 drmHashEntry *entry = drmGetEntry(fd);
2101 return drmHashDelete(entry->tagTable, context);
2104 void *drmGetContextTag(int fd, drm_context_t context)
2106 drmHashEntry *entry = drmGetEntry(fd);
2109 if (drmHashLookup(entry->tagTable, context, &value))
2115 int drmAddContextPrivateMapping(int fd, drm_context_t ctx_id,
2116 drm_handle_t handle)
2118 drm_ctx_priv_map_t map;
2120 map.ctx_id = ctx_id;
2121 map.handle = (void *)(uintptr_t)handle;
2123 if (drmIoctl(fd, DRM_IOCTL_SET_SAREA_CTX, &map))
2128 int drmGetContextPrivateMapping(int fd, drm_context_t ctx_id,
2129 drm_handle_t *handle)
2131 drm_ctx_priv_map_t map;
2133 map.ctx_id = ctx_id;
2135 if (drmIoctl(fd, DRM_IOCTL_GET_SAREA_CTX, &map))
2138 *handle = (drm_handle_t)(uintptr_t)map.handle;
2143 int drmGetMap(int fd, int idx, drm_handle_t *offset, drmSize *size,
2144 drmMapType *type, drmMapFlags *flags, drm_handle_t *handle,
2150 if (drmIoctl(fd, DRM_IOCTL_GET_MAP, &map))
2152 *offset = map.offset;
2156 *handle = (unsigned long)map.handle;
2161 int drmGetClient(int fd, int idx, int *auth, int *pid, int *uid,
2162 unsigned long *magic, unsigned long *iocs)
2164 drm_client_t client;
2167 if (drmIoctl(fd, DRM_IOCTL_GET_CLIENT, &client))
2169 *auth = client.auth;
2172 *magic = client.magic;
2173 *iocs = client.iocs;
2177 int drmGetStats(int fd, drmStatsT *stats)
2182 if (drmIoctl(fd, DRM_IOCTL_GET_STATS, &s))
2186 memset(stats, 0, sizeof(*stats));
2187 if (s.count > sizeof(stats->data)/sizeof(stats->data[0]))
2191 stats->data[i].long_format = "%-20.20s"; \
2192 stats->data[i].rate_format = "%8.8s"; \
2193 stats->data[i].isvalue = 1; \
2194 stats->data[i].verbose = 0
2197 stats->data[i].long_format = "%-20.20s"; \
2198 stats->data[i].rate_format = "%5.5s"; \
2199 stats->data[i].isvalue = 0; \
2200 stats->data[i].mult_names = "kgm"; \
2201 stats->data[i].mult = 1000; \
2202 stats->data[i].verbose = 0
2205 stats->data[i].long_format = "%-20.20s"; \
2206 stats->data[i].rate_format = "%5.5s"; \
2207 stats->data[i].isvalue = 0; \
2208 stats->data[i].mult_names = "KGM"; \
2209 stats->data[i].mult = 1024; \
2210 stats->data[i].verbose = 0
2213 stats->count = s.count;
2214 for (i = 0; i < s.count; i++) {
2215 stats->data[i].value = s.data[i].value;
2216 switch (s.data[i].type) {
2217 case _DRM_STAT_LOCK:
2218 stats->data[i].long_name = "Lock";
2219 stats->data[i].rate_name = "Lock";
2222 case _DRM_STAT_OPENS:
2223 stats->data[i].long_name = "Opens";
2224 stats->data[i].rate_name = "O";
2226 stats->data[i].verbose = 1;
2228 case _DRM_STAT_CLOSES:
2229 stats->data[i].long_name = "Closes";
2230 stats->data[i].rate_name = "Lock";
2232 stats->data[i].verbose = 1;
2234 case _DRM_STAT_IOCTLS:
2235 stats->data[i].long_name = "Ioctls";
2236 stats->data[i].rate_name = "Ioc/s";
2239 case _DRM_STAT_LOCKS:
2240 stats->data[i].long_name = "Locks";
2241 stats->data[i].rate_name = "Lck/s";
2244 case _DRM_STAT_UNLOCKS:
2245 stats->data[i].long_name = "Unlocks";
2246 stats->data[i].rate_name = "Unl/s";
2250 stats->data[i].long_name = "IRQs";
2251 stats->data[i].rate_name = "IRQ/s";
2254 case _DRM_STAT_PRIMARY:
2255 stats->data[i].long_name = "Primary Bytes";
2256 stats->data[i].rate_name = "PB/s";
2259 case _DRM_STAT_SECONDARY:
2260 stats->data[i].long_name = "Secondary Bytes";
2261 stats->data[i].rate_name = "SB/s";
2265 stats->data[i].long_name = "DMA";
2266 stats->data[i].rate_name = "DMA/s";
2269 case _DRM_STAT_SPECIAL:
2270 stats->data[i].long_name = "Special DMA";
2271 stats->data[i].rate_name = "dma/s";
2274 case _DRM_STAT_MISSED:
2275 stats->data[i].long_name = "Miss";
2276 stats->data[i].rate_name = "Ms/s";
2279 case _DRM_STAT_VALUE:
2280 stats->data[i].long_name = "Value";
2281 stats->data[i].rate_name = "Value";
2284 case _DRM_STAT_BYTE:
2285 stats->data[i].long_name = "Bytes";
2286 stats->data[i].rate_name = "B/s";
2289 case _DRM_STAT_COUNT:
2291 stats->data[i].long_name = "Count";
2292 stats->data[i].rate_name = "Cnt/s";
2301 * Issue a set-version ioctl.
2303 * \param fd file descriptor.
2304 * \param drmCommandIndex command index
2305 * \param data source pointer of the data to be read and written.
2306 * \param size size of the data to be read and written.
2308 * \return zero on success, or a negative value on failure.
2311 * It issues a read-write ioctl given by
2312 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
2314 int drmSetInterfaceVersion(int fd, drmSetVersion *version)
2317 drm_set_version_t sv;
2319 sv.drm_di_major = version->drm_di_major;
2320 sv.drm_di_minor = version->drm_di_minor;
2321 sv.drm_dd_major = version->drm_dd_major;
2322 sv.drm_dd_minor = version->drm_dd_minor;
2324 if (drmIoctl(fd, DRM_IOCTL_SET_VERSION, &sv)) {
2328 version->drm_di_major = sv.drm_di_major;
2329 version->drm_di_minor = sv.drm_di_minor;
2330 version->drm_dd_major = sv.drm_dd_major;
2331 version->drm_dd_minor = sv.drm_dd_minor;
2337 * Send a device-specific command.
2339 * \param fd file descriptor.
2340 * \param drmCommandIndex command index
2342 * \return zero on success, or a negative value on failure.
2345 * It issues a ioctl given by
2346 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
2348 int drmCommandNone(int fd, unsigned long drmCommandIndex)
2350 void *data = NULL; /* dummy */
2351 unsigned long request;
2353 request = DRM_IO( DRM_COMMAND_BASE + drmCommandIndex);
2355 if (drmIoctl(fd, request, data)) {
2363 * Send a device-specific read command.
2365 * \param fd file descriptor.
2366 * \param drmCommandIndex command index
2367 * \param data destination pointer of the data to be read.
2368 * \param size size of the data to be read.
2370 * \return zero on success, or a negative value on failure.
2373 * It issues a read ioctl given by
2374 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
2376 int drmCommandRead(int fd, unsigned long drmCommandIndex, void *data,
2379 unsigned long request;
2381 request = DRM_IOC( DRM_IOC_READ, DRM_IOCTL_BASE,
2382 DRM_COMMAND_BASE + drmCommandIndex, size);
2384 if (drmIoctl(fd, request, data)) {
2392 * Send a device-specific write command.
2394 * \param fd file descriptor.
2395 * \param drmCommandIndex command index
2396 * \param data source pointer of the data to be written.
2397 * \param size size of the data to be written.
2399 * \return zero on success, or a negative value on failure.
2402 * It issues a write ioctl given by
2403 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
2405 int drmCommandWrite(int fd, unsigned long drmCommandIndex, void *data,
2408 unsigned long request;
2410 request = DRM_IOC( DRM_IOC_WRITE, DRM_IOCTL_BASE,
2411 DRM_COMMAND_BASE + drmCommandIndex, size);
2413 if (drmIoctl(fd, request, data)) {
2421 * Send a device-specific read-write command.
2423 * \param fd file descriptor.
2424 * \param drmCommandIndex command index
2425 * \param data source pointer of the data to be read and written.
2426 * \param size size of the data to be read and written.
2428 * \return zero on success, or a negative value on failure.
2431 * It issues a read-write ioctl given by
2432 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
2434 int drmCommandWriteRead(int fd, unsigned long drmCommandIndex, void *data,
2437 unsigned long request;
2439 request = DRM_IOC( DRM_IOC_READ|DRM_IOC_WRITE, DRM_IOCTL_BASE,
2440 DRM_COMMAND_BASE + drmCommandIndex, size);
2442 if (drmIoctl(fd, request, data))
2447 #define DRM_MAX_FDS 16
2452 } connection[DRM_MAX_FDS];
2454 static int nr_fds = 0;
2456 int drmOpenOnce(void *unused,
2463 for (i = 0; i < nr_fds; i++)
2464 if (strcmp(BusID, connection[i].BusID) == 0) {
2465 connection[i].refcount++;
2467 return connection[i].fd;
2470 fd = drmOpen(unused, BusID);
2471 if (fd <= 0 || nr_fds == DRM_MAX_FDS)
2474 connection[nr_fds].BusID = strdup(BusID);
2475 connection[nr_fds].fd = fd;
2476 connection[nr_fds].refcount = 1;
2480 fprintf(stderr, "saved connection %d for %s %d\n",
2481 nr_fds, connection[nr_fds].BusID,
2482 strcmp(BusID, connection[nr_fds].BusID));
2489 void drmCloseOnce(int fd)
2493 for (i = 0; i < nr_fds; i++) {
2494 if (fd == connection[i].fd) {
2495 if (--connection[i].refcount == 0) {
2496 drmClose(connection[i].fd);
2497 free(connection[i].BusID);
2500 connection[i] = connection[nr_fds];
2508 int drmSetMaster(int fd)
2510 return ioctl(fd, DRM_IOCTL_SET_MASTER, 0);
2513 int drmDropMaster(int fd)
2515 return ioctl(fd, DRM_IOCTL_DROP_MASTER, 0);
2518 char *drmGetDeviceNameFromFd(int fd)
2525 /* The whole drmOpen thing is a fiasco and we need to find a way
2526 * back to just using open(2). For now, however, lets just make
2527 * things worse with even more ad hoc directory walking code to
2528 * discover the device file name. */
2533 for (i = 0; i < DRM_MAX_MINOR; i++) {
2534 snprintf(name, sizeof name, DRM_DEV_NAME, DRM_DIR_NAME, i);
2535 if (stat(name, &sbuf) == 0 && sbuf.st_rdev == d)
2538 if (i == DRM_MAX_MINOR)
2541 return strdup(name);
2544 int drmPrimeHandleToFD(int fd, uint32_t handle, uint32_t flags, int *prime_fd)
2546 struct drm_prime_handle args;
2549 args.handle = handle;
2551 ret = drmIoctl(fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
2555 *prime_fd = args.fd;
2559 int drmPrimeFDToHandle(int fd, int prime_fd, uint32_t *handle)
2561 struct drm_prime_handle args;
2566 ret = drmIoctl(fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &args);
2570 *handle = args.handle;