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.
51 #include <sys/types.h>
53 #define stat_t struct stat
54 #include <sys/ioctl.h>
58 #include <sys/mkdev.h>
60 #ifdef MAJOR_IN_SYSMACROS
61 #include <sys/sysmacros.h>
65 /* Not all systems have MAP_FAILED defined */
67 #define MAP_FAILED ((void *)-1)
71 #include "libdrm_macros.h"
73 #include "util_math.h"
76 #define DRM_PRIMARY_MINOR_NAME "drm"
77 #define DRM_CONTROL_MINOR_NAME "drmC"
78 #define DRM_RENDER_MINOR_NAME "drmR"
80 #define DRM_PRIMARY_MINOR_NAME "card"
81 #define DRM_CONTROL_MINOR_NAME "controlD"
82 #define DRM_RENDER_MINOR_NAME "renderD"
85 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
99 #endif /* __OpenBSD__ */
102 #define DRM_MAJOR 226 /* Linux */
113 uint16_t subvendor_id;
114 uint16_t subdevice_id;
118 #define DRM_IOCTL_GET_PCIINFO DRM_IOR(0x15, struct drm_pciinfo)
121 #define DRM_MSG_VERBOSITY 3
123 #define memclear(s) memset(&s, 0, sizeof(s))
125 static drmServerInfoPtr drm_server_info;
127 void drmSetServerInfo(drmServerInfoPtr info)
129 drm_server_info = info;
133 * Output a message to stderr.
135 * \param format printf() like format string.
138 * This function is a wrapper around vfprintf().
141 static int DRM_PRINTFLIKE(1, 0)
142 drmDebugPrint(const char *format, va_list ap)
144 return vfprintf(stderr, format, ap);
148 drmMsg(const char *format, ...)
152 if (((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) ||
153 (drm_server_info && drm_server_info->debug_print))
155 va_start(ap, format);
156 if (drm_server_info) {
157 drm_server_info->debug_print(format,ap);
159 drmDebugPrint(format, ap);
165 static void *drmHashTable = NULL; /* Context switch callbacks */
167 void *drmGetHashTable(void)
172 void *drmMalloc(int size)
174 return calloc(1, size);
177 void drmFree(void *pt)
183 * Call ioctl, restarting if it is interupted
186 drmIoctl(int fd, unsigned long request, void *arg)
191 ret = ioctl(fd, request, arg);
192 } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
196 static unsigned long drmGetKeyFromFd(int fd)
205 drmHashEntry *drmGetEntry(int fd)
207 unsigned long key = drmGetKeyFromFd(fd);
212 drmHashTable = drmHashCreate();
214 if (drmHashLookup(drmHashTable, key, &value)) {
215 entry = drmMalloc(sizeof(*entry));
218 entry->tagTable = drmHashCreate();
219 drmHashInsert(drmHashTable, key, entry);
227 * Compare two busid strings
232 * \return 1 if matched.
235 * This function compares two bus ID strings. It understands the older
236 * PCI:b:d:f format and the newer pci:oooo:bb:dd.f format. In the format, o is
237 * domain, b is bus, d is device, f is function.
239 static int drmMatchBusID(const char *id1, const char *id2, int pci_domain_ok)
241 /* First, check if the IDs are exactly the same */
242 if (strcasecmp(id1, id2) == 0)
245 /* Try to match old/new-style PCI bus IDs. */
246 if (strncasecmp(id1, "pci", 3) == 0) {
247 unsigned int o1, b1, d1, f1;
248 unsigned int o2, b2, d2, f2;
251 ret = sscanf(id1, "pci:%04x:%02x:%02x.%u", &o1, &b1, &d1, &f1);
254 ret = sscanf(id1, "PCI:%u:%u:%u", &b1, &d1, &f1);
259 ret = sscanf(id2, "pci:%04x:%02x:%02x.%u", &o2, &b2, &d2, &f2);
262 ret = sscanf(id2, "PCI:%u:%u:%u", &b2, &d2, &f2);
267 /* If domains aren't properly supported by the kernel interface,
268 * just ignore them, which sucks less than picking a totally random
269 * card with "open by name"
274 if ((o1 != o2) || (b1 != b2) || (d1 != d2) || (f1 != f2))
283 * Handles error checking for chown call.
285 * \param path to file.
286 * \param id of the new owner.
287 * \param id of the new group.
289 * \return zero if success or -1 if failure.
292 * Checks for failure. If failure was caused by signal call chown again.
293 * If any other failure happened then it will output error mesage using
297 static int chown_check_return(const char *path, uid_t owner, gid_t group)
302 rv = chown(path, owner, group);
303 } while (rv != 0 && errno == EINTR);
308 drmMsg("Failed to change owner or group for file %s! %d: %s\n",
309 path, errno, strerror(errno));
315 * Open the DRM device, creating it if necessary.
317 * \param dev major and minor numbers of the device.
318 * \param minor minor number of the device.
320 * \return a file descriptor on success, or a negative value on error.
323 * Assembles the device name from \p minor and opens it, creating the device
324 * special file node with the major and minor numbers specified by \p dev and
325 * parent directory if necessary and was called by root.
327 static int drmOpenDevice(dev_t dev, int minor, int type)
330 const char *dev_name;
333 mode_t devmode = DRM_DEV_MODE, serv_mode;
336 int isroot = !geteuid();
337 uid_t user = DRM_DEV_UID;
338 gid_t group = DRM_DEV_GID;
342 case DRM_NODE_PRIMARY:
343 dev_name = DRM_DEV_NAME;
345 case DRM_NODE_CONTROL:
346 dev_name = DRM_CONTROL_DEV_NAME;
348 case DRM_NODE_RENDER:
349 dev_name = DRM_RENDER_DEV_NAME;
355 sprintf(buf, dev_name, DRM_DIR_NAME, minor);
356 drmMsg("drmOpenDevice: node name is %s\n", buf);
358 if (drm_server_info && drm_server_info->get_perms) {
359 drm_server_info->get_perms(&serv_group, &serv_mode);
360 devmode = serv_mode ? serv_mode : DRM_DEV_MODE;
361 devmode &= ~(S_IXUSR|S_IXGRP|S_IXOTH);
365 if (stat(DRM_DIR_NAME, &st)) {
367 return DRM_ERR_NOT_ROOT;
368 mkdir(DRM_DIR_NAME, DRM_DEV_DIRMODE);
369 chown_check_return(DRM_DIR_NAME, 0, 0); /* root:root */
370 chmod(DRM_DIR_NAME, DRM_DEV_DIRMODE);
373 /* Check if the device node exists and create it if necessary. */
374 if (stat(buf, &st)) {
376 return DRM_ERR_NOT_ROOT;
378 mknod(buf, S_IFCHR | devmode, dev);
381 if (drm_server_info && drm_server_info->get_perms) {
382 group = ((int)serv_group >= 0) ? serv_group : DRM_DEV_GID;
383 chown_check_return(buf, user, group);
387 /* if we modprobed then wait for udev */
391 if (stat(DRM_DIR_NAME, &st)) {
395 if (udev_count == 50)
400 if (stat(buf, &st)) {
404 if (udev_count == 50)
411 fd = open(buf, O_RDWR, 0);
412 drmMsg("drmOpenDevice: open result is %d, (%s)\n",
413 fd, fd < 0 ? strerror(errno) : "OK");
418 /* Check if the device node is not what we expect it to be, and recreate it
419 * and try again if so.
421 if (st.st_rdev != dev) {
423 return DRM_ERR_NOT_ROOT;
425 mknod(buf, S_IFCHR | devmode, dev);
426 if (drm_server_info && drm_server_info->get_perms) {
427 chown_check_return(buf, user, group);
431 fd = open(buf, O_RDWR, 0);
432 drmMsg("drmOpenDevice: open result is %d, (%s)\n",
433 fd, fd < 0 ? strerror(errno) : "OK");
437 drmMsg("drmOpenDevice: Open failed\n");
445 * Open the DRM device
447 * \param minor device minor number.
448 * \param create allow to create the device if set.
450 * \return a file descriptor on success, or a negative value on error.
453 * Calls drmOpenDevice() if \p create is set, otherwise assembles the device
454 * name from \p minor and opens it.
456 static int drmOpenMinor(int minor, int create, int type)
460 const char *dev_name;
463 return drmOpenDevice(makedev(DRM_MAJOR, minor), minor, type);
466 case DRM_NODE_PRIMARY:
467 dev_name = DRM_DEV_NAME;
469 case DRM_NODE_CONTROL:
470 dev_name = DRM_CONTROL_DEV_NAME;
472 case DRM_NODE_RENDER:
473 dev_name = DRM_RENDER_DEV_NAME;
479 sprintf(buf, dev_name, DRM_DIR_NAME, minor);
480 if ((fd = open(buf, O_RDWR, 0)) >= 0)
487 * Determine whether the DRM kernel driver has been loaded.
489 * \return 1 if the DRM driver is loaded, 0 otherwise.
492 * Determine the presence of the kernel driver by attempting to open the 0
493 * minor and get version information. For backward compatibility with older
494 * Linux implementations, /proc/dri is also checked.
496 int drmAvailable(void)
498 drmVersionPtr version;
502 if ((fd = drmOpenMinor(0, 1, DRM_NODE_PRIMARY)) < 0) {
504 /* Try proc for backward Linux compatibility */
505 if (!access("/proc/dri/0", R_OK))
511 if ((version = drmGetVersion(fd))) {
513 drmFreeVersion(version);
520 static int drmGetMinorBase(int type)
523 case DRM_NODE_PRIMARY:
525 case DRM_NODE_CONTROL:
527 case DRM_NODE_RENDER:
534 static int drmGetMinorType(int minor)
536 int type = minor >> 6;
542 case DRM_NODE_PRIMARY:
543 case DRM_NODE_CONTROL:
544 case DRM_NODE_RENDER:
551 static const char *drmGetMinorName(int type)
554 case DRM_NODE_PRIMARY:
555 return DRM_PRIMARY_MINOR_NAME;
556 case DRM_NODE_CONTROL:
557 return DRM_CONTROL_MINOR_NAME;
558 case DRM_NODE_RENDER:
559 return DRM_RENDER_MINOR_NAME;
566 * Open the device by bus ID.
568 * \param busid bus ID.
569 * \param type device node type.
571 * \return a file descriptor on success, or a negative value on error.
574 * This function attempts to open every possible minor (up to DRM_MAX_MINOR),
575 * comparing the device bus ID with the one supplied.
577 * \sa drmOpenMinor() and drmGetBusid().
579 static int drmOpenByBusid(const char *busid, int type)
581 int i, pci_domain_ok = 1;
585 int base = drmGetMinorBase(type);
590 drmMsg("drmOpenByBusid: Searching for BusID %s\n", busid);
591 for (i = base; i < base + DRM_MAX_MINOR; i++) {
592 fd = drmOpenMinor(i, 1, type);
593 drmMsg("drmOpenByBusid: drmOpenMinor returns %d\n", fd);
595 /* We need to try for 1.4 first for proper PCI domain support
596 * and if that fails, we know the kernel is busted
600 sv.drm_dd_major = -1; /* Don't care */
601 sv.drm_dd_minor = -1; /* Don't care */
602 if (drmSetInterfaceVersion(fd, &sv)) {
608 sv.drm_dd_major = -1; /* Don't care */
609 sv.drm_dd_minor = -1; /* Don't care */
610 drmMsg("drmOpenByBusid: Interface 1.4 failed, trying 1.1\n");
611 drmSetInterfaceVersion(fd, &sv);
613 buf = drmGetBusid(fd);
614 drmMsg("drmOpenByBusid: drmGetBusid reports %s\n", buf);
615 if (buf && drmMatchBusID(buf, busid, pci_domain_ok)) {
629 * Open the device by name.
631 * \param name driver name.
632 * \param type the device node type.
634 * \return a file descriptor on success, or a negative value on error.
637 * This function opens the first minor number that matches the driver name and
638 * isn't already in use. If it's in use it then it will already have a bus ID
641 * \sa drmOpenMinor(), drmGetVersion() and drmGetBusid().
643 static int drmOpenByName(const char *name, int type)
647 drmVersionPtr version;
649 int base = drmGetMinorBase(type);
655 * Open the first minor number that matches the driver name and isn't
656 * already in use. If it's in use it will have a busid assigned already.
658 for (i = base; i < base + DRM_MAX_MINOR; i++) {
659 if ((fd = drmOpenMinor(i, 1, type)) >= 0) {
660 if ((version = drmGetVersion(fd))) {
661 if (!strcmp(version->name, name)) {
662 drmFreeVersion(version);
663 id = drmGetBusid(fd);
664 drmMsg("drmGetBusid returned '%s'\n", id ? id : "NULL");
673 drmFreeVersion(version);
681 /* Backward-compatibility /proc support */
682 for (i = 0; i < 8; i++) {
683 char proc_name[64], buf[512];
684 char *driver, *pt, *devstring;
687 sprintf(proc_name, "/proc/dri/%d/name", i);
688 if ((fd = open(proc_name, 0, 0)) >= 0) {
689 retcode = read(fd, buf, sizeof(buf)-1);
692 buf[retcode-1] = '\0';
693 for (driver = pt = buf; *pt && *pt != ' '; ++pt)
695 if (*pt) { /* Device is next */
697 if (!strcmp(driver, name)) { /* Match */
698 for (devstring = ++pt; *pt && *pt != ' '; ++pt)
700 if (*pt) { /* Found busid */
701 return drmOpenByBusid(++pt, type);
702 } else { /* No busid */
703 return drmOpenDevice(strtol(devstring, NULL, 0),i, type);
717 * Open the DRM device.
719 * Looks up the specified name and bus ID, and opens the device found. The
720 * entry in /dev/dri is created if necessary and if called by root.
722 * \param name driver name. Not referenced if bus ID is supplied.
723 * \param busid bus ID. Zero if not known.
725 * \return a file descriptor on success, or a negative value on error.
728 * It calls drmOpenByBusid() if \p busid is specified or drmOpenByName()
731 int drmOpen(const char *name, const char *busid)
733 return drmOpenWithType(name, busid, DRM_NODE_PRIMARY);
737 * Open the DRM device with specified type.
739 * Looks up the specified name and bus ID, and opens the device found. The
740 * entry in /dev/dri is created if necessary and if called by root.
742 * \param name driver name. Not referenced if bus ID is supplied.
743 * \param busid bus ID. Zero if not known.
744 * \param type the device node type to open, PRIMARY, CONTROL or RENDER
746 * \return a file descriptor on success, or a negative value on error.
749 * It calls drmOpenByBusid() if \p busid is specified or drmOpenByName()
752 int drmOpenWithType(const char *name, const char *busid, int type)
754 if (!drmAvailable() && name != NULL && drm_server_info &&
755 drm_server_info->load_module) {
756 /* try to load the kernel module */
757 if (!drm_server_info->load_module(name)) {
758 drmMsg("[drm] failed to load kernel module \"%s\"\n", name);
764 int fd = drmOpenByBusid(busid, type);
770 return drmOpenByName(name, type);
775 int drmOpenControl(int minor)
777 return drmOpenMinor(minor, 0, DRM_NODE_CONTROL);
780 int drmOpenRender(int minor)
782 return drmOpenMinor(minor, 0, DRM_NODE_RENDER);
786 * Free the version information returned by drmGetVersion().
788 * \param v pointer to the version information.
791 * It frees the memory pointed by \p %v as well as all the non-null strings
794 void drmFreeVersion(drmVersionPtr v)
806 * Free the non-public version information returned by the kernel.
808 * \param v pointer to the version information.
811 * Used by drmGetVersion() to free the memory pointed by \p %v as well as all
812 * the non-null strings pointers in it.
814 static void drmFreeKernelVersion(drm_version_t *v)
826 * Copy version information.
828 * \param d destination pointer.
829 * \param s source pointer.
832 * Used by drmGetVersion() to translate the information returned by the ioctl
833 * interface in a private structure into the public structure counterpart.
835 static void drmCopyVersion(drmVersionPtr d, const drm_version_t *s)
837 d->version_major = s->version_major;
838 d->version_minor = s->version_minor;
839 d->version_patchlevel = s->version_patchlevel;
840 d->name_len = s->name_len;
841 d->name = strdup(s->name);
842 d->date_len = s->date_len;
843 d->date = strdup(s->date);
844 d->desc_len = s->desc_len;
845 d->desc = strdup(s->desc);
850 * Query the driver version information.
852 * \param fd file descriptor.
854 * \return pointer to a drmVersion structure which should be freed with
857 * \note Similar information is available via /proc/dri.
860 * It gets the version information via successive DRM_IOCTL_VERSION ioctls,
861 * first with zeros to get the string lengths, and then the actually strings.
862 * It also null-terminates them since they might not be already.
864 drmVersionPtr drmGetVersion(int fd)
866 drmVersionPtr retval;
867 drm_version_t *version = drmMalloc(sizeof(*version));
869 if (drmIoctl(fd, DRM_IOCTL_VERSION, version)) {
870 drmFreeKernelVersion(version);
874 if (version->name_len)
875 version->name = drmMalloc(version->name_len + 1);
876 if (version->date_len)
877 version->date = drmMalloc(version->date_len + 1);
878 if (version->desc_len)
879 version->desc = drmMalloc(version->desc_len + 1);
881 if (drmIoctl(fd, DRM_IOCTL_VERSION, version)) {
882 drmMsg("DRM_IOCTL_VERSION: %s\n", strerror(errno));
883 drmFreeKernelVersion(version);
887 /* The results might not be null-terminated strings, so terminate them. */
888 if (version->name_len) version->name[version->name_len] = '\0';
889 if (version->date_len) version->date[version->date_len] = '\0';
890 if (version->desc_len) version->desc[version->desc_len] = '\0';
892 retval = drmMalloc(sizeof(*retval));
893 drmCopyVersion(retval, version);
894 drmFreeKernelVersion(version);
900 * Get version information for the DRM user space library.
902 * This version number is driver independent.
904 * \param fd file descriptor.
906 * \return version information.
909 * This function allocates and fills a drm_version structure with a hard coded
912 drmVersionPtr drmGetLibVersion(int fd)
914 drm_version_t *version = drmMalloc(sizeof(*version));
917 * NOTE THIS MUST NOT GO ABOVE VERSION 1.X due to drivers needing it
918 * revision 1.0.x = original DRM interface with no drmGetLibVersion
919 * entry point and many drm<Device> extensions
920 * revision 1.1.x = added drmCommand entry points for device extensions
921 * added drmGetLibVersion to identify libdrm.a version
922 * revision 1.2.x = added drmSetInterfaceVersion
923 * modified drmOpen to handle both busid and name
924 * revision 1.3.x = added server + memory manager
926 version->version_major = 1;
927 version->version_minor = 3;
928 version->version_patchlevel = 0;
930 return (drmVersionPtr)version;
933 int drmGetCap(int fd, uint64_t capability, uint64_t *value)
935 struct drm_get_cap cap;
939 cap.capability = capability;
941 ret = drmIoctl(fd, DRM_IOCTL_GET_CAP, &cap);
949 int drmSetClientCap(int fd, uint64_t capability, uint64_t value)
951 struct drm_set_client_cap cap;
954 cap.capability = capability;
957 return drmIoctl(fd, DRM_IOCTL_SET_CLIENT_CAP, &cap);
961 * Free the bus ID information.
963 * \param busid bus ID information string as given by drmGetBusid().
966 * This function is just frees the memory pointed by \p busid.
968 void drmFreeBusid(const char *busid)
970 drmFree((void *)busid);
975 * Get the bus ID of the device.
977 * \param fd file descriptor.
979 * \return bus ID string.
982 * This function gets the bus ID via successive DRM_IOCTL_GET_UNIQUE ioctls to
983 * get the string length and data, passing the arguments in a drm_unique
986 char *drmGetBusid(int fd)
992 if (drmIoctl(fd, DRM_IOCTL_GET_UNIQUE, &u))
994 u.unique = drmMalloc(u.unique_len + 1);
995 if (drmIoctl(fd, DRM_IOCTL_GET_UNIQUE, &u)) {
999 u.unique[u.unique_len] = '\0';
1006 * Set the bus ID of the device.
1008 * \param fd file descriptor.
1009 * \param busid bus ID string.
1011 * \return zero on success, negative on failure.
1014 * This function is a wrapper around the DRM_IOCTL_SET_UNIQUE ioctl, passing
1015 * the arguments in a drm_unique structure.
1017 int drmSetBusid(int fd, const char *busid)
1022 u.unique = (char *)busid;
1023 u.unique_len = strlen(busid);
1025 if (drmIoctl(fd, DRM_IOCTL_SET_UNIQUE, &u)) {
1031 int drmGetMagic(int fd, drm_magic_t * magic)
1038 if (drmIoctl(fd, DRM_IOCTL_GET_MAGIC, &auth))
1040 *magic = auth.magic;
1044 int drmAuthMagic(int fd, drm_magic_t magic)
1050 if (drmIoctl(fd, DRM_IOCTL_AUTH_MAGIC, &auth))
1056 * Specifies a range of memory that is available for mapping by a
1059 * \param fd file descriptor.
1060 * \param offset usually the physical address. The actual meaning depends of
1061 * the \p type parameter. See below.
1062 * \param size of the memory in bytes.
1063 * \param type type of the memory to be mapped.
1064 * \param flags combination of several flags to modify the function actions.
1065 * \param handle will be set to a value that may be used as the offset
1066 * parameter for mmap().
1068 * \return zero on success or a negative value on error.
1070 * \par Mapping the frame buffer
1071 * For the frame buffer
1072 * - \p offset will be the physical address of the start of the frame buffer,
1073 * - \p size will be the size of the frame buffer in bytes, and
1074 * - \p type will be DRM_FRAME_BUFFER.
1077 * The area mapped will be uncached. If MTRR support is available in the
1078 * kernel, the frame buffer area will be set to write combining.
1080 * \par Mapping the MMIO register area
1081 * For the MMIO register area,
1082 * - \p offset will be the physical address of the start of the register area,
1083 * - \p size will be the size of the register area bytes, and
1084 * - \p type will be DRM_REGISTERS.
1086 * The area mapped will be uncached.
1088 * \par Mapping the SAREA
1090 * - \p offset will be ignored and should be set to zero,
1091 * - \p size will be the desired size of the SAREA in bytes,
1092 * - \p type will be DRM_SHM.
1095 * A shared memory area of the requested size will be created and locked in
1096 * kernel memory. This area may be mapped into client-space by using the handle
1099 * \note May only be called by root.
1102 * This function is a wrapper around the DRM_IOCTL_ADD_MAP ioctl, passing
1103 * the arguments in a drm_map structure.
1105 int drmAddMap(int fd, drm_handle_t offset, drmSize size, drmMapType type,
1106 drmMapFlags flags, drm_handle_t *handle)
1111 map.offset = offset;
1115 if (drmIoctl(fd, DRM_IOCTL_ADD_MAP, &map))
1118 *handle = (drm_handle_t)(uintptr_t)map.handle;
1122 int drmRmMap(int fd, drm_handle_t handle)
1127 map.handle = (void *)(uintptr_t)handle;
1129 if(drmIoctl(fd, DRM_IOCTL_RM_MAP, &map))
1135 * Make buffers available for DMA transfers.
1137 * \param fd file descriptor.
1138 * \param count number of buffers.
1139 * \param size size of each buffer.
1140 * \param flags buffer allocation flags.
1141 * \param agp_offset offset in the AGP aperture
1143 * \return number of buffers allocated, negative on error.
1146 * This function is a wrapper around DRM_IOCTL_ADD_BUFS ioctl.
1150 int drmAddBufs(int fd, int count, int size, drmBufDescFlags flags,
1153 drm_buf_desc_t request;
1156 request.count = count;
1157 request.size = size;
1158 request.flags = flags;
1159 request.agp_start = agp_offset;
1161 if (drmIoctl(fd, DRM_IOCTL_ADD_BUFS, &request))
1163 return request.count;
1166 int drmMarkBufs(int fd, double low, double high)
1168 drm_buf_info_t info;
1173 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info))
1179 if (!(info.list = drmMalloc(info.count * sizeof(*info.list))))
1182 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info)) {
1183 int retval = -errno;
1188 for (i = 0; i < info.count; i++) {
1189 info.list[i].low_mark = low * info.list[i].count;
1190 info.list[i].high_mark = high * info.list[i].count;
1191 if (drmIoctl(fd, DRM_IOCTL_MARK_BUFS, &info.list[i])) {
1192 int retval = -errno;
1205 * \param fd file descriptor.
1206 * \param count number of buffers to free.
1207 * \param list list of buffers to be freed.
1209 * \return zero on success, or a negative value on failure.
1211 * \note This function is primarily used for debugging.
1214 * This function is a wrapper around the DRM_IOCTL_FREE_BUFS ioctl, passing
1215 * the arguments in a drm_buf_free structure.
1217 int drmFreeBufs(int fd, int count, int *list)
1219 drm_buf_free_t request;
1222 request.count = count;
1223 request.list = list;
1224 if (drmIoctl(fd, DRM_IOCTL_FREE_BUFS, &request))
1233 * \param fd file descriptor.
1236 * This function closes the file descriptor.
1238 int drmClose(int fd)
1240 unsigned long key = drmGetKeyFromFd(fd);
1241 drmHashEntry *entry = drmGetEntry(fd);
1243 drmHashDestroy(entry->tagTable);
1246 entry->tagTable = NULL;
1248 drmHashDelete(drmHashTable, key);
1256 * Map a region of memory.
1258 * \param fd file descriptor.
1259 * \param handle handle returned by drmAddMap().
1260 * \param size size in bytes. Must match the size used by drmAddMap().
1261 * \param address will contain the user-space virtual address where the mapping
1264 * \return zero on success, or a negative value on failure.
1267 * This function is a wrapper for mmap().
1269 int drmMap(int fd, drm_handle_t handle, drmSize size, drmAddressPtr address)
1271 static unsigned long pagesize_mask = 0;
1277 pagesize_mask = getpagesize() - 1;
1279 size = (size + pagesize_mask) & ~pagesize_mask;
1281 *address = drm_mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, handle);
1282 if (*address == MAP_FAILED)
1289 * Unmap mappings obtained with drmMap().
1291 * \param address address as given by drmMap().
1292 * \param size size in bytes. Must match the size used by drmMap().
1294 * \return zero on success, or a negative value on failure.
1297 * This function is a wrapper for munmap().
1299 int drmUnmap(drmAddress address, drmSize size)
1301 return drm_munmap(address, size);
1304 drmBufInfoPtr drmGetBufInfo(int fd)
1306 drm_buf_info_t info;
1307 drmBufInfoPtr retval;
1312 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info))
1316 if (!(info.list = drmMalloc(info.count * sizeof(*info.list))))
1319 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info)) {
1324 retval = drmMalloc(sizeof(*retval));
1325 retval->count = info.count;
1326 retval->list = drmMalloc(info.count * sizeof(*retval->list));
1327 for (i = 0; i < info.count; i++) {
1328 retval->list[i].count = info.list[i].count;
1329 retval->list[i].size = info.list[i].size;
1330 retval->list[i].low_mark = info.list[i].low_mark;
1331 retval->list[i].high_mark = info.list[i].high_mark;
1340 * Map all DMA buffers into client-virtual space.
1342 * \param fd file descriptor.
1344 * \return a pointer to a ::drmBufMap structure.
1346 * \note The client may not use these buffers until obtaining buffer indices
1350 * This function calls the DRM_IOCTL_MAP_BUFS ioctl and copies the returned
1351 * information about the buffers in a drm_buf_map structure into the
1352 * client-visible data structures.
1354 drmBufMapPtr drmMapBufs(int fd)
1357 drmBufMapPtr retval;
1361 if (drmIoctl(fd, DRM_IOCTL_MAP_BUFS, &bufs))
1367 if (!(bufs.list = drmMalloc(bufs.count * sizeof(*bufs.list))))
1370 if (drmIoctl(fd, DRM_IOCTL_MAP_BUFS, &bufs)) {
1375 retval = drmMalloc(sizeof(*retval));
1376 retval->count = bufs.count;
1377 retval->list = drmMalloc(bufs.count * sizeof(*retval->list));
1378 for (i = 0; i < bufs.count; i++) {
1379 retval->list[i].idx = bufs.list[i].idx;
1380 retval->list[i].total = bufs.list[i].total;
1381 retval->list[i].used = 0;
1382 retval->list[i].address = bufs.list[i].address;
1391 * Unmap buffers allocated with drmMapBufs().
1393 * \return zero on success, or negative value on failure.
1396 * Calls munmap() for every buffer stored in \p bufs and frees the
1397 * memory allocated by drmMapBufs().
1399 int drmUnmapBufs(drmBufMapPtr bufs)
1403 for (i = 0; i < bufs->count; i++) {
1404 drm_munmap(bufs->list[i].address, bufs->list[i].total);
1407 drmFree(bufs->list);
1413 #define DRM_DMA_RETRY 16
1416 * Reserve DMA buffers.
1418 * \param fd file descriptor.
1421 * \return zero on success, or a negative value on failure.
1424 * Assemble the arguments into a drm_dma structure and keeps issuing the
1425 * DRM_IOCTL_DMA ioctl until success or until maximum number of retries.
1427 int drmDMA(int fd, drmDMAReqPtr request)
1432 dma.context = request->context;
1433 dma.send_count = request->send_count;
1434 dma.send_indices = request->send_list;
1435 dma.send_sizes = request->send_sizes;
1436 dma.flags = request->flags;
1437 dma.request_count = request->request_count;
1438 dma.request_size = request->request_size;
1439 dma.request_indices = request->request_list;
1440 dma.request_sizes = request->request_sizes;
1441 dma.granted_count = 0;
1444 ret = ioctl( fd, DRM_IOCTL_DMA, &dma );
1445 } while ( ret && errno == EAGAIN && i++ < DRM_DMA_RETRY );
1448 request->granted_count = dma.granted_count;
1457 * Obtain heavyweight hardware lock.
1459 * \param fd file descriptor.
1460 * \param context context.
1461 * \param flags flags that determine the sate of the hardware when the function
1464 * \return always zero.
1467 * This function translates the arguments into a drm_lock structure and issue
1468 * the DRM_IOCTL_LOCK ioctl until the lock is successfully acquired.
1470 int drmGetLock(int fd, drm_context_t context, drmLockFlags flags)
1475 lock.context = context;
1477 if (flags & DRM_LOCK_READY) lock.flags |= _DRM_LOCK_READY;
1478 if (flags & DRM_LOCK_QUIESCENT) lock.flags |= _DRM_LOCK_QUIESCENT;
1479 if (flags & DRM_LOCK_FLUSH) lock.flags |= _DRM_LOCK_FLUSH;
1480 if (flags & DRM_LOCK_FLUSH_ALL) lock.flags |= _DRM_LOCK_FLUSH_ALL;
1481 if (flags & DRM_HALT_ALL_QUEUES) lock.flags |= _DRM_HALT_ALL_QUEUES;
1482 if (flags & DRM_HALT_CUR_QUEUES) lock.flags |= _DRM_HALT_CUR_QUEUES;
1484 while (drmIoctl(fd, DRM_IOCTL_LOCK, &lock))
1490 * Release the hardware lock.
1492 * \param fd file descriptor.
1493 * \param context context.
1495 * \return zero on success, or a negative value on failure.
1498 * This function is a wrapper around the DRM_IOCTL_UNLOCK ioctl, passing the
1499 * argument in a drm_lock structure.
1501 int drmUnlock(int fd, drm_context_t context)
1506 lock.context = context;
1507 return drmIoctl(fd, DRM_IOCTL_UNLOCK, &lock);
1510 drm_context_t *drmGetReservedContextList(int fd, int *count)
1514 drm_context_t * retval;
1518 if (drmIoctl(fd, DRM_IOCTL_RES_CTX, &res))
1524 if (!(list = drmMalloc(res.count * sizeof(*list))))
1526 if (!(retval = drmMalloc(res.count * sizeof(*retval))))
1529 res.contexts = list;
1530 if (drmIoctl(fd, DRM_IOCTL_RES_CTX, &res))
1531 goto err_free_context;
1533 for (i = 0; i < res.count; i++)
1534 retval[i] = list[i].handle;
1547 void drmFreeReservedContextList(drm_context_t *pt)
1555 * Used by the X server during GLXContext initialization. This causes
1556 * per-context kernel-level resources to be allocated.
1558 * \param fd file descriptor.
1559 * \param handle is set on success. To be used by the client when requesting DMA
1560 * dispatch with drmDMA().
1562 * \return zero on success, or a negative value on failure.
1564 * \note May only be called by root.
1567 * This function is a wrapper around the DRM_IOCTL_ADD_CTX ioctl, passing the
1568 * argument in a drm_ctx structure.
1570 int drmCreateContext(int fd, drm_context_t *handle)
1575 if (drmIoctl(fd, DRM_IOCTL_ADD_CTX, &ctx))
1577 *handle = ctx.handle;
1581 int drmSwitchToContext(int fd, drm_context_t context)
1586 ctx.handle = context;
1587 if (drmIoctl(fd, DRM_IOCTL_SWITCH_CTX, &ctx))
1592 int drmSetContextFlags(int fd, drm_context_t context, drm_context_tFlags flags)
1597 * Context preserving means that no context switches are done between DMA
1598 * buffers from one context and the next. This is suitable for use in the
1599 * X server (which promises to maintain hardware context), or in the
1600 * client-side library when buffers are swapped on behalf of two threads.
1603 ctx.handle = context;
1604 if (flags & DRM_CONTEXT_PRESERVED)
1605 ctx.flags |= _DRM_CONTEXT_PRESERVED;
1606 if (flags & DRM_CONTEXT_2DONLY)
1607 ctx.flags |= _DRM_CONTEXT_2DONLY;
1608 if (drmIoctl(fd, DRM_IOCTL_MOD_CTX, &ctx))
1613 int drmGetContextFlags(int fd, drm_context_t context,
1614 drm_context_tFlagsPtr flags)
1619 ctx.handle = context;
1620 if (drmIoctl(fd, DRM_IOCTL_GET_CTX, &ctx))
1623 if (ctx.flags & _DRM_CONTEXT_PRESERVED)
1624 *flags |= DRM_CONTEXT_PRESERVED;
1625 if (ctx.flags & _DRM_CONTEXT_2DONLY)
1626 *flags |= DRM_CONTEXT_2DONLY;
1633 * Free any kernel-level resources allocated with drmCreateContext() associated
1636 * \param fd file descriptor.
1637 * \param handle handle given by drmCreateContext().
1639 * \return zero on success, or a negative value on failure.
1641 * \note May only be called by root.
1644 * This function is a wrapper around the DRM_IOCTL_RM_CTX ioctl, passing the
1645 * argument in a drm_ctx structure.
1647 int drmDestroyContext(int fd, drm_context_t handle)
1652 ctx.handle = handle;
1653 if (drmIoctl(fd, DRM_IOCTL_RM_CTX, &ctx))
1658 int drmCreateDrawable(int fd, drm_drawable_t *handle)
1663 if (drmIoctl(fd, DRM_IOCTL_ADD_DRAW, &draw))
1665 *handle = draw.handle;
1669 int drmDestroyDrawable(int fd, drm_drawable_t handle)
1674 draw.handle = handle;
1675 if (drmIoctl(fd, DRM_IOCTL_RM_DRAW, &draw))
1680 int drmUpdateDrawableInfo(int fd, drm_drawable_t handle,
1681 drm_drawable_info_type_t type, unsigned int num,
1684 drm_update_draw_t update;
1687 update.handle = handle;
1690 update.data = (unsigned long long)(unsigned long)data;
1692 if (drmIoctl(fd, DRM_IOCTL_UPDATE_DRAW, &update))
1699 * Acquire the AGP device.
1701 * Must be called before any of the other AGP related calls.
1703 * \param fd file descriptor.
1705 * \return zero on success, or a negative value on failure.
1708 * This function is a wrapper around the DRM_IOCTL_AGP_ACQUIRE ioctl.
1710 int drmAgpAcquire(int fd)
1712 if (drmIoctl(fd, DRM_IOCTL_AGP_ACQUIRE, NULL))
1719 * Release the AGP device.
1721 * \param fd file descriptor.
1723 * \return zero on success, or a negative value on failure.
1726 * This function is a wrapper around the DRM_IOCTL_AGP_RELEASE ioctl.
1728 int drmAgpRelease(int fd)
1730 if (drmIoctl(fd, DRM_IOCTL_AGP_RELEASE, NULL))
1739 * \param fd file descriptor.
1740 * \param mode AGP mode.
1742 * \return zero on success, or a negative value on failure.
1745 * This function is a wrapper around the DRM_IOCTL_AGP_ENABLE ioctl, passing the
1746 * argument in a drm_agp_mode structure.
1748 int drmAgpEnable(int fd, unsigned long mode)
1754 if (drmIoctl(fd, DRM_IOCTL_AGP_ENABLE, &m))
1761 * Allocate a chunk of AGP memory.
1763 * \param fd file descriptor.
1764 * \param size requested memory size in bytes. Will be rounded to page boundary.
1765 * \param type type of memory to allocate.
1766 * \param address if not zero, will be set to the physical address of the
1768 * \param handle on success will be set to a handle of the allocated memory.
1770 * \return zero on success, or a negative value on failure.
1773 * This function is a wrapper around the DRM_IOCTL_AGP_ALLOC ioctl, passing the
1774 * arguments in a drm_agp_buffer structure.
1776 int drmAgpAlloc(int fd, unsigned long size, unsigned long type,
1777 unsigned long *address, drm_handle_t *handle)
1782 *handle = DRM_AGP_NO_HANDLE;
1785 if (drmIoctl(fd, DRM_IOCTL_AGP_ALLOC, &b))
1788 *address = b.physical;
1795 * Free a chunk of AGP memory.
1797 * \param fd file descriptor.
1798 * \param handle handle to the allocated memory, as given by drmAgpAllocate().
1800 * \return zero on success, or a negative value on failure.
1803 * This function is a wrapper around the DRM_IOCTL_AGP_FREE ioctl, passing the
1804 * argument in a drm_agp_buffer structure.
1806 int drmAgpFree(int fd, drm_handle_t handle)
1812 if (drmIoctl(fd, DRM_IOCTL_AGP_FREE, &b))
1819 * Bind a chunk of AGP memory.
1821 * \param fd file descriptor.
1822 * \param handle handle to the allocated memory, as given by drmAgpAllocate().
1823 * \param offset offset in bytes. It will round to page boundary.
1825 * \return zero on success, or a negative value on failure.
1828 * This function is a wrapper around the DRM_IOCTL_AGP_BIND ioctl, passing the
1829 * argument in a drm_agp_binding structure.
1831 int drmAgpBind(int fd, drm_handle_t handle, unsigned long offset)
1833 drm_agp_binding_t b;
1838 if (drmIoctl(fd, DRM_IOCTL_AGP_BIND, &b))
1845 * Unbind a chunk of AGP memory.
1847 * \param fd file descriptor.
1848 * \param handle handle to the allocated memory, as given by drmAgpAllocate().
1850 * \return zero on success, or a negative value on failure.
1853 * This function is a wrapper around the DRM_IOCTL_AGP_UNBIND ioctl, passing
1854 * the argument in a drm_agp_binding structure.
1856 int drmAgpUnbind(int fd, drm_handle_t handle)
1858 drm_agp_binding_t b;
1862 if (drmIoctl(fd, DRM_IOCTL_AGP_UNBIND, &b))
1869 * Get AGP driver major version number.
1871 * \param fd file descriptor.
1873 * \return major version number on success, or a negative value on failure..
1876 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1877 * necessary information in a drm_agp_info structure.
1879 int drmAgpVersionMajor(int fd)
1885 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1887 return i.agp_version_major;
1892 * Get AGP driver minor version number.
1894 * \param fd file descriptor.
1896 * \return minor version number on success, or a negative value on failure.
1899 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1900 * necessary information in a drm_agp_info structure.
1902 int drmAgpVersionMinor(int fd)
1908 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1910 return i.agp_version_minor;
1917 * \param fd file descriptor.
1919 * \return mode on success, or zero on failure.
1922 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1923 * necessary information in a drm_agp_info structure.
1925 unsigned long drmAgpGetMode(int fd)
1931 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1938 * Get AGP aperture base.
1940 * \param fd file descriptor.
1942 * \return aperture base on success, zero on failure.
1945 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1946 * necessary information in a drm_agp_info structure.
1948 unsigned long drmAgpBase(int fd)
1954 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1956 return i.aperture_base;
1961 * Get AGP aperture size.
1963 * \param fd file descriptor.
1965 * \return aperture size on success, zero on failure.
1968 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1969 * necessary information in a drm_agp_info structure.
1971 unsigned long drmAgpSize(int fd)
1977 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
1979 return i.aperture_size;
1984 * Get used AGP memory.
1986 * \param fd file descriptor.
1988 * \return memory used on success, or zero on failure.
1991 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
1992 * necessary information in a drm_agp_info structure.
1994 unsigned long drmAgpMemoryUsed(int fd)
2000 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2002 return i.memory_used;
2007 * Get available AGP memory.
2009 * \param fd file descriptor.
2011 * \return memory available on success, or zero on failure.
2014 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2015 * necessary information in a drm_agp_info structure.
2017 unsigned long drmAgpMemoryAvail(int fd)
2023 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2025 return i.memory_allowed;
2030 * Get hardware vendor ID.
2032 * \param fd file descriptor.
2034 * \return vendor ID on success, or zero on failure.
2037 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2038 * necessary information in a drm_agp_info structure.
2040 unsigned int drmAgpVendorId(int fd)
2046 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2053 * Get hardware device ID.
2055 * \param fd file descriptor.
2057 * \return zero on success, or zero on failure.
2060 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2061 * necessary information in a drm_agp_info structure.
2063 unsigned int drmAgpDeviceId(int fd)
2069 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2074 int drmScatterGatherAlloc(int fd, unsigned long size, drm_handle_t *handle)
2076 drm_scatter_gather_t sg;
2082 if (drmIoctl(fd, DRM_IOCTL_SG_ALLOC, &sg))
2084 *handle = sg.handle;
2088 int drmScatterGatherFree(int fd, drm_handle_t handle)
2090 drm_scatter_gather_t sg;
2094 if (drmIoctl(fd, DRM_IOCTL_SG_FREE, &sg))
2102 * \param fd file descriptor.
2103 * \param vbl pointer to a drmVBlank structure.
2105 * \return zero on success, or a negative value on failure.
2108 * This function is a wrapper around the DRM_IOCTL_WAIT_VBLANK ioctl.
2110 int drmWaitVBlank(int fd, drmVBlankPtr vbl)
2112 struct timespec timeout, cur;
2115 ret = clock_gettime(CLOCK_MONOTONIC, &timeout);
2117 fprintf(stderr, "clock_gettime failed: %s\n", strerror(errno));
2123 ret = ioctl(fd, DRM_IOCTL_WAIT_VBLANK, vbl);
2124 vbl->request.type &= ~DRM_VBLANK_RELATIVE;
2125 if (ret && errno == EINTR) {
2126 clock_gettime(CLOCK_MONOTONIC, &cur);
2127 /* Timeout after 1s */
2128 if (cur.tv_sec > timeout.tv_sec + 1 ||
2129 (cur.tv_sec == timeout.tv_sec && cur.tv_nsec >=
2136 } while (ret && errno == EINTR);
2142 int drmError(int err, const char *label)
2145 case DRM_ERR_NO_DEVICE:
2146 fprintf(stderr, "%s: no device\n", label);
2148 case DRM_ERR_NO_ACCESS:
2149 fprintf(stderr, "%s: no access\n", label);
2151 case DRM_ERR_NOT_ROOT:
2152 fprintf(stderr, "%s: not root\n", label);
2154 case DRM_ERR_INVALID:
2155 fprintf(stderr, "%s: invalid args\n", label);
2160 fprintf( stderr, "%s: error %d (%s)\n", label, err, strerror(err) );
2168 * Install IRQ handler.
2170 * \param fd file descriptor.
2171 * \param irq IRQ number.
2173 * \return zero on success, or a negative value on failure.
2176 * This function is a wrapper around the DRM_IOCTL_CONTROL ioctl, passing the
2177 * argument in a drm_control structure.
2179 int drmCtlInstHandler(int fd, int irq)
2184 ctl.func = DRM_INST_HANDLER;
2186 if (drmIoctl(fd, DRM_IOCTL_CONTROL, &ctl))
2193 * Uninstall IRQ handler.
2195 * \param fd file descriptor.
2197 * \return zero on success, or a negative value on failure.
2200 * This function is a wrapper around the DRM_IOCTL_CONTROL ioctl, passing the
2201 * argument in a drm_control structure.
2203 int drmCtlUninstHandler(int fd)
2208 ctl.func = DRM_UNINST_HANDLER;
2210 if (drmIoctl(fd, DRM_IOCTL_CONTROL, &ctl))
2215 int drmFinish(int fd, int context, drmLockFlags flags)
2220 lock.context = context;
2221 if (flags & DRM_LOCK_READY) lock.flags |= _DRM_LOCK_READY;
2222 if (flags & DRM_LOCK_QUIESCENT) lock.flags |= _DRM_LOCK_QUIESCENT;
2223 if (flags & DRM_LOCK_FLUSH) lock.flags |= _DRM_LOCK_FLUSH;
2224 if (flags & DRM_LOCK_FLUSH_ALL) lock.flags |= _DRM_LOCK_FLUSH_ALL;
2225 if (flags & DRM_HALT_ALL_QUEUES) lock.flags |= _DRM_HALT_ALL_QUEUES;
2226 if (flags & DRM_HALT_CUR_QUEUES) lock.flags |= _DRM_HALT_CUR_QUEUES;
2227 if (drmIoctl(fd, DRM_IOCTL_FINISH, &lock))
2233 * Get IRQ from bus ID.
2235 * \param fd file descriptor.
2236 * \param busnum bus number.
2237 * \param devnum device number.
2238 * \param funcnum function number.
2240 * \return IRQ number on success, or a negative value on failure.
2243 * This function is a wrapper around the DRM_IOCTL_IRQ_BUSID ioctl, passing the
2244 * arguments in a drm_irq_busid structure.
2246 int drmGetInterruptFromBusID(int fd, int busnum, int devnum, int funcnum)
2253 p.funcnum = funcnum;
2254 if (drmIoctl(fd, DRM_IOCTL_IRQ_BUSID, &p))
2259 int drmAddContextTag(int fd, drm_context_t context, void *tag)
2261 drmHashEntry *entry = drmGetEntry(fd);
2263 if (drmHashInsert(entry->tagTable, context, tag)) {
2264 drmHashDelete(entry->tagTable, context);
2265 drmHashInsert(entry->tagTable, context, tag);
2270 int drmDelContextTag(int fd, drm_context_t context)
2272 drmHashEntry *entry = drmGetEntry(fd);
2274 return drmHashDelete(entry->tagTable, context);
2277 void *drmGetContextTag(int fd, drm_context_t context)
2279 drmHashEntry *entry = drmGetEntry(fd);
2282 if (drmHashLookup(entry->tagTable, context, &value))
2288 int drmAddContextPrivateMapping(int fd, drm_context_t ctx_id,
2289 drm_handle_t handle)
2291 drm_ctx_priv_map_t map;
2294 map.ctx_id = ctx_id;
2295 map.handle = (void *)(uintptr_t)handle;
2297 if (drmIoctl(fd, DRM_IOCTL_SET_SAREA_CTX, &map))
2302 int drmGetContextPrivateMapping(int fd, drm_context_t ctx_id,
2303 drm_handle_t *handle)
2305 drm_ctx_priv_map_t map;
2308 map.ctx_id = ctx_id;
2310 if (drmIoctl(fd, DRM_IOCTL_GET_SAREA_CTX, &map))
2313 *handle = (drm_handle_t)(uintptr_t)map.handle;
2318 int drmGetMap(int fd, int idx, drm_handle_t *offset, drmSize *size,
2319 drmMapType *type, drmMapFlags *flags, drm_handle_t *handle,
2326 if (drmIoctl(fd, DRM_IOCTL_GET_MAP, &map))
2328 *offset = map.offset;
2332 *handle = (unsigned long)map.handle;
2337 int drmGetClient(int fd, int idx, int *auth, int *pid, int *uid,
2338 unsigned long *magic, unsigned long *iocs)
2340 drm_client_t client;
2344 if (drmIoctl(fd, DRM_IOCTL_GET_CLIENT, &client))
2346 *auth = client.auth;
2349 *magic = client.magic;
2350 *iocs = client.iocs;
2354 int drmGetStats(int fd, drmStatsT *stats)
2360 if (drmIoctl(fd, DRM_IOCTL_GET_STATS, &s))
2364 memset(stats, 0, sizeof(*stats));
2365 if (s.count > sizeof(stats->data)/sizeof(stats->data[0]))
2369 stats->data[i].long_format = "%-20.20s"; \
2370 stats->data[i].rate_format = "%8.8s"; \
2371 stats->data[i].isvalue = 1; \
2372 stats->data[i].verbose = 0
2375 stats->data[i].long_format = "%-20.20s"; \
2376 stats->data[i].rate_format = "%5.5s"; \
2377 stats->data[i].isvalue = 0; \
2378 stats->data[i].mult_names = "kgm"; \
2379 stats->data[i].mult = 1000; \
2380 stats->data[i].verbose = 0
2383 stats->data[i].long_format = "%-20.20s"; \
2384 stats->data[i].rate_format = "%5.5s"; \
2385 stats->data[i].isvalue = 0; \
2386 stats->data[i].mult_names = "KGM"; \
2387 stats->data[i].mult = 1024; \
2388 stats->data[i].verbose = 0
2391 stats->count = s.count;
2392 for (i = 0; i < s.count; i++) {
2393 stats->data[i].value = s.data[i].value;
2394 switch (s.data[i].type) {
2395 case _DRM_STAT_LOCK:
2396 stats->data[i].long_name = "Lock";
2397 stats->data[i].rate_name = "Lock";
2400 case _DRM_STAT_OPENS:
2401 stats->data[i].long_name = "Opens";
2402 stats->data[i].rate_name = "O";
2404 stats->data[i].verbose = 1;
2406 case _DRM_STAT_CLOSES:
2407 stats->data[i].long_name = "Closes";
2408 stats->data[i].rate_name = "Lock";
2410 stats->data[i].verbose = 1;
2412 case _DRM_STAT_IOCTLS:
2413 stats->data[i].long_name = "Ioctls";
2414 stats->data[i].rate_name = "Ioc/s";
2417 case _DRM_STAT_LOCKS:
2418 stats->data[i].long_name = "Locks";
2419 stats->data[i].rate_name = "Lck/s";
2422 case _DRM_STAT_UNLOCKS:
2423 stats->data[i].long_name = "Unlocks";
2424 stats->data[i].rate_name = "Unl/s";
2428 stats->data[i].long_name = "IRQs";
2429 stats->data[i].rate_name = "IRQ/s";
2432 case _DRM_STAT_PRIMARY:
2433 stats->data[i].long_name = "Primary Bytes";
2434 stats->data[i].rate_name = "PB/s";
2437 case _DRM_STAT_SECONDARY:
2438 stats->data[i].long_name = "Secondary Bytes";
2439 stats->data[i].rate_name = "SB/s";
2443 stats->data[i].long_name = "DMA";
2444 stats->data[i].rate_name = "DMA/s";
2447 case _DRM_STAT_SPECIAL:
2448 stats->data[i].long_name = "Special DMA";
2449 stats->data[i].rate_name = "dma/s";
2452 case _DRM_STAT_MISSED:
2453 stats->data[i].long_name = "Miss";
2454 stats->data[i].rate_name = "Ms/s";
2457 case _DRM_STAT_VALUE:
2458 stats->data[i].long_name = "Value";
2459 stats->data[i].rate_name = "Value";
2462 case _DRM_STAT_BYTE:
2463 stats->data[i].long_name = "Bytes";
2464 stats->data[i].rate_name = "B/s";
2467 case _DRM_STAT_COUNT:
2469 stats->data[i].long_name = "Count";
2470 stats->data[i].rate_name = "Cnt/s";
2479 * Issue a set-version ioctl.
2481 * \param fd file descriptor.
2482 * \param drmCommandIndex command index
2483 * \param data source pointer of the data to be read and written.
2484 * \param size size of the data to be read and written.
2486 * \return zero on success, or a negative value on failure.
2489 * It issues a read-write ioctl given by
2490 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
2492 int drmSetInterfaceVersion(int fd, drmSetVersion *version)
2495 drm_set_version_t sv;
2498 sv.drm_di_major = version->drm_di_major;
2499 sv.drm_di_minor = version->drm_di_minor;
2500 sv.drm_dd_major = version->drm_dd_major;
2501 sv.drm_dd_minor = version->drm_dd_minor;
2503 if (drmIoctl(fd, DRM_IOCTL_SET_VERSION, &sv)) {
2507 version->drm_di_major = sv.drm_di_major;
2508 version->drm_di_minor = sv.drm_di_minor;
2509 version->drm_dd_major = sv.drm_dd_major;
2510 version->drm_dd_minor = sv.drm_dd_minor;
2516 * Send a device-specific command.
2518 * \param fd file descriptor.
2519 * \param drmCommandIndex command index
2521 * \return zero on success, or a negative value on failure.
2524 * It issues a ioctl given by
2525 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
2527 int drmCommandNone(int fd, unsigned long drmCommandIndex)
2529 unsigned long request;
2531 request = DRM_IO( DRM_COMMAND_BASE + drmCommandIndex);
2533 if (drmIoctl(fd, request, NULL)) {
2541 * Send a device-specific read command.
2543 * \param fd file descriptor.
2544 * \param drmCommandIndex command index
2545 * \param data destination pointer of the data to be read.
2546 * \param size size of the data to be read.
2548 * \return zero on success, or a negative value on failure.
2551 * It issues a read ioctl given by
2552 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
2554 int drmCommandRead(int fd, unsigned long drmCommandIndex, void *data,
2557 unsigned long request;
2559 request = DRM_IOC( DRM_IOC_READ, DRM_IOCTL_BASE,
2560 DRM_COMMAND_BASE + drmCommandIndex, size);
2562 if (drmIoctl(fd, request, data)) {
2570 * Send a device-specific write command.
2572 * \param fd file descriptor.
2573 * \param drmCommandIndex command index
2574 * \param data source pointer of the data to be written.
2575 * \param size size of the data to be written.
2577 * \return zero on success, or a negative value on failure.
2580 * It issues a write ioctl given by
2581 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
2583 int drmCommandWrite(int fd, unsigned long drmCommandIndex, void *data,
2586 unsigned long request;
2588 request = DRM_IOC( DRM_IOC_WRITE, DRM_IOCTL_BASE,
2589 DRM_COMMAND_BASE + drmCommandIndex, size);
2591 if (drmIoctl(fd, request, data)) {
2599 * Send a device-specific read-write command.
2601 * \param fd file descriptor.
2602 * \param drmCommandIndex command index
2603 * \param data source pointer of the data to be read and written.
2604 * \param size size of the data to be read and written.
2606 * \return zero on success, or a negative value on failure.
2609 * It issues a read-write ioctl given by
2610 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
2612 int drmCommandWriteRead(int fd, unsigned long drmCommandIndex, void *data,
2615 unsigned long request;
2617 request = DRM_IOC( DRM_IOC_READ|DRM_IOC_WRITE, DRM_IOCTL_BASE,
2618 DRM_COMMAND_BASE + drmCommandIndex, size);
2620 if (drmIoctl(fd, request, data))
2625 #define DRM_MAX_FDS 16
2631 } connection[DRM_MAX_FDS];
2633 static int nr_fds = 0;
2635 int drmOpenOnce(void *unused,
2639 return drmOpenOnceWithType(BusID, newlyopened, DRM_NODE_PRIMARY);
2642 int drmOpenOnceWithType(const char *BusID, int *newlyopened, int type)
2647 for (i = 0; i < nr_fds; i++)
2648 if ((strcmp(BusID, connection[i].BusID) == 0) &&
2649 (connection[i].type == type)) {
2650 connection[i].refcount++;
2652 return connection[i].fd;
2655 fd = drmOpenWithType(NULL, BusID, type);
2656 if (fd < 0 || nr_fds == DRM_MAX_FDS)
2659 connection[nr_fds].BusID = strdup(BusID);
2660 connection[nr_fds].fd = fd;
2661 connection[nr_fds].refcount = 1;
2662 connection[nr_fds].type = type;
2666 fprintf(stderr, "saved connection %d for %s %d\n",
2667 nr_fds, connection[nr_fds].BusID,
2668 strcmp(BusID, connection[nr_fds].BusID));
2675 void drmCloseOnce(int fd)
2679 for (i = 0; i < nr_fds; i++) {
2680 if (fd == connection[i].fd) {
2681 if (--connection[i].refcount == 0) {
2682 drmClose(connection[i].fd);
2683 free(connection[i].BusID);
2686 connection[i] = connection[nr_fds];
2694 int drmSetMaster(int fd)
2696 return drmIoctl(fd, DRM_IOCTL_SET_MASTER, NULL);
2699 int drmDropMaster(int fd)
2701 return drmIoctl(fd, DRM_IOCTL_DROP_MASTER, NULL);
2704 char *drmGetDeviceNameFromFd(int fd)
2711 /* The whole drmOpen thing is a fiasco and we need to find a way
2712 * back to just using open(2). For now, however, lets just make
2713 * things worse with even more ad hoc directory walking code to
2714 * discover the device file name. */
2719 for (i = 0; i < DRM_MAX_MINOR; i++) {
2720 snprintf(name, sizeof name, DRM_DEV_NAME, DRM_DIR_NAME, i);
2721 if (stat(name, &sbuf) == 0 && sbuf.st_rdev == d)
2724 if (i == DRM_MAX_MINOR)
2727 return strdup(name);
2730 int drmGetNodeTypeFromFd(int fd)
2735 if (fstat(fd, &sbuf))
2738 maj = major(sbuf.st_rdev);
2739 min = minor(sbuf.st_rdev);
2741 if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode)) {
2746 type = drmGetMinorType(min);
2752 int drmPrimeHandleToFD(int fd, uint32_t handle, uint32_t flags, int *prime_fd)
2754 struct drm_prime_handle args;
2759 args.handle = handle;
2761 ret = drmIoctl(fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
2765 *prime_fd = args.fd;
2769 int drmPrimeFDToHandle(int fd, int prime_fd, uint32_t *handle)
2771 struct drm_prime_handle args;
2776 ret = drmIoctl(fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &args);
2780 *handle = args.handle;
2784 static char *drmGetMinorNameForFD(int fd, int type)
2788 struct dirent *pent, *ent;
2790 const char *name = drmGetMinorName(type);
2792 char dev_name[64], buf[64];
2801 if (fstat(fd, &sbuf))
2804 maj = major(sbuf.st_rdev);
2805 min = minor(sbuf.st_rdev);
2807 if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
2810 snprintf(buf, sizeof(buf), "/sys/dev/char/%d:%d/device/drm", maj, min);
2812 sysdir = opendir(buf);
2816 name_max = fpathconf(dirfd(sysdir), _PC_NAME_MAX);
2820 pent = malloc(offsetof(struct dirent, d_name) + name_max + 1);
2824 while (readdir_r(sysdir, pent, &ent) == 0 && ent != NULL) {
2825 if (strncmp(ent->d_name, name, len) == 0) {
2826 snprintf(dev_name, sizeof(dev_name), DRM_DIR_NAME "/%s",
2832 return strdup(dev_name);
2842 char buf[PATH_MAX + 1];
2843 const char *dev_name;
2844 unsigned int maj, min;
2847 if (fstat(fd, &sbuf))
2850 maj = major(sbuf.st_rdev);
2851 min = minor(sbuf.st_rdev);
2853 if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
2857 case DRM_NODE_PRIMARY:
2858 dev_name = DRM_DEV_NAME;
2860 case DRM_NODE_CONTROL:
2861 dev_name = DRM_CONTROL_DEV_NAME;
2863 case DRM_NODE_RENDER:
2864 dev_name = DRM_RENDER_DEV_NAME;
2870 base = drmGetMinorBase(type);
2874 n = snprintf(buf, sizeof(buf), dev_name, DRM_DIR_NAME, min - base);
2875 if (n == -1 || n >= sizeof(buf))
2883 char *drmGetPrimaryDeviceNameFromFd(int fd)
2885 return drmGetMinorNameForFD(fd, DRM_NODE_PRIMARY);
2888 char *drmGetRenderDeviceNameFromFd(int fd)
2890 return drmGetMinorNameForFD(fd, DRM_NODE_RENDER);
2894 static char * DRM_PRINTFLIKE(2, 3)
2895 sysfs_uevent_get(const char *path, const char *fmt, ...)
2897 char filename[PATH_MAX + 1], *key, *line = NULL, *value = NULL;
2898 size_t size = 0, len;
2904 num = vasprintf(&key, fmt, ap);
2908 snprintf(filename, sizeof(filename), "%s/uevent", path);
2910 fp = fopen(filename, "r");
2916 while ((num = getline(&line, &size, fp)) >= 0) {
2917 if ((strncmp(line, key, len) == 0) && (line[len] == '=')) {
2918 char *start = line + len + 1, *end = line + num - 1;
2923 value = strndup(start, end - start);
2937 static int drmParseSubsystemType(int maj, int min)
2940 char path[PATH_MAX + 1];
2941 char link[PATH_MAX + 1] = "";
2944 snprintf(path, PATH_MAX, "/sys/dev/char/%d:%d/device/subsystem",
2947 if (readlink(path, link, PATH_MAX) < 0)
2950 name = strrchr(link, '/');
2954 if (strncmp(name, "/pci", 4) == 0)
2957 if (strncmp(name, "/usb", 4) == 0)
2960 if (strncmp(name, "/platform", 9) == 0)
2961 return DRM_BUS_PLATFORM;
2963 if (strncmp(name, "/host1x", 7) == 0)
2964 return DRM_BUS_HOST1X;
2967 #elif defined(__OpenBSD__)
2970 #warning "Missing implementation of drmParseSubsystemType"
2975 static int drmParsePciBusInfo(int maj, int min, drmPciBusInfoPtr info)
2978 unsigned int domain, bus, dev, func;
2979 char path[PATH_MAX + 1], *value;
2982 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
2984 value = sysfs_uevent_get(path, "PCI_SLOT_NAME");
2988 num = sscanf(value, "%04x:%02x:%02x.%1u", &domain, &bus, &dev, &func);
2994 info->domain = domain;
3000 #elif defined(__OpenBSD__)
3001 struct drm_pciinfo pinfo;
3004 type = drmGetMinorType(min);
3008 fd = drmOpenMinor(min, 0, type);
3012 if (drmIoctl(fd, DRM_IOCTL_GET_PCIINFO, &pinfo)) {
3018 info->domain = pinfo.domain;
3019 info->bus = pinfo.bus;
3020 info->dev = pinfo.dev;
3021 info->func = pinfo.func;
3025 #warning "Missing implementation of drmParsePciBusInfo"
3030 int drmDevicesEqual(drmDevicePtr a, drmDevicePtr b)
3032 if (a == NULL || b == NULL)
3035 if (a->bustype != b->bustype)
3038 switch (a->bustype) {
3040 return memcmp(a->businfo.pci, b->businfo.pci, sizeof(drmPciBusInfo)) == 0;
3043 return memcmp(a->businfo.usb, b->businfo.usb, sizeof(drmUsbBusInfo)) == 0;
3045 case DRM_BUS_PLATFORM:
3046 return memcmp(a->businfo.platform, b->businfo.platform, sizeof(drmPlatformBusInfo)) == 0;
3048 case DRM_BUS_HOST1X:
3049 return memcmp(a->businfo.host1x, b->businfo.host1x, sizeof(drmHost1xBusInfo)) == 0;
3058 static int drmGetNodeType(const char *name)
3060 if (strncmp(name, DRM_PRIMARY_MINOR_NAME,
3061 sizeof(DRM_PRIMARY_MINOR_NAME) - 1) == 0)
3062 return DRM_NODE_PRIMARY;
3064 if (strncmp(name, DRM_CONTROL_MINOR_NAME,
3065 sizeof(DRM_CONTROL_MINOR_NAME ) - 1) == 0)
3066 return DRM_NODE_CONTROL;
3068 if (strncmp(name, DRM_RENDER_MINOR_NAME,
3069 sizeof(DRM_RENDER_MINOR_NAME) - 1) == 0)
3070 return DRM_NODE_RENDER;
3075 static int drmGetMaxNodeName(void)
3077 return sizeof(DRM_DIR_NAME) +
3078 MAX3(sizeof(DRM_PRIMARY_MINOR_NAME),
3079 sizeof(DRM_CONTROL_MINOR_NAME),
3080 sizeof(DRM_RENDER_MINOR_NAME)) +
3081 3 /* length of the node number */;
3085 static int parse_separate_sysfs_files(int maj, int min,
3086 drmPciDeviceInfoPtr device,
3087 bool ignore_revision)
3089 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
3090 static const char *attrs[] = {
3091 "revision", /* Older kernels are missing the file, so check for it first */
3097 char path[PATH_MAX + 1];
3098 unsigned int data[ARRAY_SIZE(attrs)];
3102 for (unsigned i = ignore_revision ? 1 : 0; i < ARRAY_SIZE(attrs); i++) {
3103 snprintf(path, PATH_MAX, "/sys/dev/char/%d:%d/device/%s", maj, min,
3105 fp = fopen(path, "r");
3109 ret = fscanf(fp, "%x", &data[i]);
3116 device->revision_id = ignore_revision ? 0xff : data[0] & 0xff;
3117 device->vendor_id = data[1] & 0xffff;
3118 device->device_id = data[2] & 0xffff;
3119 device->subvendor_id = data[3] & 0xffff;
3120 device->subdevice_id = data[4] & 0xffff;
3125 static int parse_config_sysfs_file(int maj, int min,
3126 drmPciDeviceInfoPtr device)
3128 char path[PATH_MAX + 1];
3129 unsigned char config[64];
3132 snprintf(path, PATH_MAX, "/sys/dev/char/%d:%d/device/config", maj, min);
3133 fd = open(path, O_RDONLY);
3137 ret = read(fd, config, sizeof(config));
3142 device->vendor_id = config[0] | (config[1] << 8);
3143 device->device_id = config[2] | (config[3] << 8);
3144 device->revision_id = config[8];
3145 device->subvendor_id = config[44] | (config[45] << 8);
3146 device->subdevice_id = config[46] | (config[47] << 8);
3152 static int drmParsePciDeviceInfo(int maj, int min,
3153 drmPciDeviceInfoPtr device,
3157 if (!(flags & DRM_DEVICE_GET_PCI_REVISION))
3158 return parse_separate_sysfs_files(maj, min, device, true);
3160 if (parse_separate_sysfs_files(maj, min, device, false))
3161 return parse_config_sysfs_file(maj, min, device);
3164 #elif defined(__OpenBSD__)
3165 struct drm_pciinfo pinfo;
3168 type = drmGetMinorType(min);
3172 fd = drmOpenMinor(min, 0, type);
3176 if (drmIoctl(fd, DRM_IOCTL_GET_PCIINFO, &pinfo)) {
3182 device->vendor_id = pinfo.vendor_id;
3183 device->device_id = pinfo.device_id;
3184 device->revision_id = pinfo.revision_id;
3185 device->subvendor_id = pinfo.subvendor_id;
3186 device->subdevice_id = pinfo.subdevice_id;
3190 #warning "Missing implementation of drmParsePciDeviceInfo"
3195 static void drmFreePlatformDevice(drmDevicePtr device)
3197 if (device->deviceinfo.platform) {
3198 if (device->deviceinfo.platform->compatible) {
3199 char **compatible = device->deviceinfo.platform->compatible;
3201 while (*compatible) {
3206 free(device->deviceinfo.platform->compatible);
3211 static void drmFreeHost1xDevice(drmDevicePtr device)
3213 if (device->deviceinfo.host1x) {
3214 if (device->deviceinfo.host1x->compatible) {
3215 char **compatible = device->deviceinfo.host1x->compatible;
3217 while (*compatible) {
3222 free(device->deviceinfo.host1x->compatible);
3227 void drmFreeDevice(drmDevicePtr *device)
3233 switch ((*device)->bustype) {
3234 case DRM_BUS_PLATFORM:
3235 drmFreePlatformDevice(*device);
3238 case DRM_BUS_HOST1X:
3239 drmFreeHost1xDevice(*device);
3248 void drmFreeDevices(drmDevicePtr devices[], int count)
3252 if (devices == NULL)
3255 for (i = 0; i < count; i++)
3257 drmFreeDevice(&devices[i]);
3260 static drmDevicePtr drmDeviceAlloc(unsigned int type, const char *node,
3261 size_t bus_size, size_t device_size,
3264 size_t max_node_length, extra, size;
3265 drmDevicePtr device;
3269 max_node_length = ALIGN(drmGetMaxNodeName(), sizeof(void *));
3270 extra = DRM_NODE_MAX * (sizeof(void *) + max_node_length);
3272 size = sizeof(*device) + extra + bus_size + device_size;
3274 device = calloc(1, size);
3278 device->available_nodes = 1 << type;
3280 ptr = (char *)device + sizeof(*device);
3281 device->nodes = (char **)ptr;
3283 ptr += DRM_NODE_MAX * sizeof(void *);
3285 for (i = 0; i < DRM_NODE_MAX; i++) {
3286 device->nodes[i] = ptr;
3287 ptr += max_node_length;
3290 memcpy(device->nodes[type], node, max_node_length);
3297 static int drmProcessPciDevice(drmDevicePtr *device,
3298 const char *node, int node_type,
3299 int maj, int min, bool fetch_deviceinfo,
3306 dev = drmDeviceAlloc(node_type, node, sizeof(drmPciBusInfo),
3307 sizeof(drmPciDeviceInfo), &addr);
3311 dev->bustype = DRM_BUS_PCI;
3313 dev->businfo.pci = (drmPciBusInfoPtr)addr;
3315 ret = drmParsePciBusInfo(maj, min, dev->businfo.pci);
3319 // Fetch the device info if the user has requested it
3320 if (fetch_deviceinfo) {
3321 addr += sizeof(drmPciBusInfo);
3322 dev->deviceinfo.pci = (drmPciDeviceInfoPtr)addr;
3324 ret = drmParsePciDeviceInfo(maj, min, dev->deviceinfo.pci, flags);
3338 static int drmParseUsbBusInfo(int maj, int min, drmUsbBusInfoPtr info)
3341 char path[PATH_MAX + 1], *value;
3342 unsigned int bus, dev;
3345 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
3347 value = sysfs_uevent_get(path, "BUSNUM");
3351 ret = sscanf(value, "%03u", &bus);
3357 value = sysfs_uevent_get(path, "DEVNUM");
3361 ret = sscanf(value, "%03u", &dev);
3372 #warning "Missing implementation of drmParseUsbBusInfo"
3377 static int drmParseUsbDeviceInfo(int maj, int min, drmUsbDeviceInfoPtr info)
3380 char path[PATH_MAX + 1], *value;
3381 unsigned int vendor, product;
3384 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
3386 value = sysfs_uevent_get(path, "PRODUCT");
3390 ret = sscanf(value, "%x/%x", &vendor, &product);
3396 info->vendor = vendor;
3397 info->product = product;
3401 #warning "Missing implementation of drmParseUsbDeviceInfo"
3406 static int drmProcessUsbDevice(drmDevicePtr *device, const char *node,
3407 int node_type, int maj, int min,
3408 bool fetch_deviceinfo, uint32_t flags)
3414 dev = drmDeviceAlloc(node_type, node, sizeof(drmUsbBusInfo),
3415 sizeof(drmUsbDeviceInfo), &ptr);
3419 dev->bustype = DRM_BUS_USB;
3421 dev->businfo.usb = (drmUsbBusInfoPtr)ptr;
3423 ret = drmParseUsbBusInfo(maj, min, dev->businfo.usb);
3427 if (fetch_deviceinfo) {
3428 ptr += sizeof(drmUsbBusInfo);
3429 dev->deviceinfo.usb = (drmUsbDeviceInfoPtr)ptr;
3431 ret = drmParseUsbDeviceInfo(maj, min, dev->deviceinfo.usb);
3445 static int drmParsePlatformBusInfo(int maj, int min, drmPlatformBusInfoPtr info)
3448 char path[PATH_MAX + 1], *name;
3450 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
3452 name = sysfs_uevent_get(path, "OF_FULLNAME");
3456 strncpy(info->fullname, name, DRM_PLATFORM_DEVICE_NAME_LEN);
3457 info->fullname[DRM_PLATFORM_DEVICE_NAME_LEN - 1] = '\0';
3462 #warning "Missing implementation of drmParsePlatformBusInfo"
3467 static int drmParsePlatformDeviceInfo(int maj, int min,
3468 drmPlatformDeviceInfoPtr info)
3471 char path[PATH_MAX + 1], *value;
3472 unsigned int count, i;
3475 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
3477 value = sysfs_uevent_get(path, "OF_COMPATIBLE_N");
3481 sscanf(value, "%u", &count);
3484 info->compatible = calloc(count + 1, sizeof(*info->compatible));
3485 if (!info->compatible)
3488 for (i = 0; i < count; i++) {
3489 value = sysfs_uevent_get(path, "OF_COMPATIBLE_%u", i);
3495 info->compatible[i] = value;
3502 free(info->compatible[i]);
3504 free(info->compatible);
3507 #warning "Missing implementation of drmParsePlatformDeviceInfo"
3512 static int drmProcessPlatformDevice(drmDevicePtr *device,
3513 const char *node, int node_type,
3514 int maj, int min, bool fetch_deviceinfo,
3521 dev = drmDeviceAlloc(node_type, node, sizeof(drmPlatformBusInfo),
3522 sizeof(drmPlatformDeviceInfo), &ptr);
3526 dev->bustype = DRM_BUS_PLATFORM;
3528 dev->businfo.platform = (drmPlatformBusInfoPtr)ptr;
3530 ret = drmParsePlatformBusInfo(maj, min, dev->businfo.platform);
3534 if (fetch_deviceinfo) {
3535 ptr += sizeof(drmPlatformBusInfo);
3536 dev->deviceinfo.platform = (drmPlatformDeviceInfoPtr)ptr;
3538 ret = drmParsePlatformDeviceInfo(maj, min, dev->deviceinfo.platform);
3552 static int drmParseHost1xBusInfo(int maj, int min, drmHost1xBusInfoPtr info)
3555 char path[PATH_MAX + 1], *name;
3557 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
3559 name = sysfs_uevent_get(path, "OF_FULLNAME");
3563 strncpy(info->fullname, name, DRM_HOST1X_DEVICE_NAME_LEN);
3564 info->fullname[DRM_HOST1X_DEVICE_NAME_LEN - 1] = '\0';
3569 #warning "Missing implementation of drmParseHost1xBusInfo"
3574 static int drmParseHost1xDeviceInfo(int maj, int min,
3575 drmHost1xDeviceInfoPtr info)
3578 char path[PATH_MAX + 1], *value;
3579 unsigned int count, i;
3582 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
3584 value = sysfs_uevent_get(path, "OF_COMPATIBLE_N");
3588 sscanf(value, "%u", &count);
3591 info->compatible = calloc(count + 1, sizeof(*info->compatible));
3592 if (!info->compatible)
3595 for (i = 0; i < count; i++) {
3596 value = sysfs_uevent_get(path, "OF_COMPATIBLE_%u", i);
3602 info->compatible[i] = value;
3609 free(info->compatible[i]);
3611 free(info->compatible);
3614 #warning "Missing implementation of drmParseHost1xDeviceInfo"
3619 static int drmProcessHost1xDevice(drmDevicePtr *device,
3620 const char *node, int node_type,
3621 int maj, int min, bool fetch_deviceinfo,
3628 dev = drmDeviceAlloc(node_type, node, sizeof(drmHost1xBusInfo),
3629 sizeof(drmHost1xDeviceInfo), &ptr);
3633 dev->bustype = DRM_BUS_HOST1X;
3635 dev->businfo.host1x = (drmHost1xBusInfoPtr)ptr;
3637 ret = drmParseHost1xBusInfo(maj, min, dev->businfo.host1x);
3641 if (fetch_deviceinfo) {
3642 ptr += sizeof(drmHost1xBusInfo);
3643 dev->deviceinfo.host1x = (drmHost1xDeviceInfoPtr)ptr;
3645 ret = drmParseHost1xDeviceInfo(maj, min, dev->deviceinfo.host1x);
3659 /* Consider devices located on the same bus as duplicate and fold the respective
3660 * entries into a single one.
3662 * Note: this leaves "gaps" in the array, while preserving the length.
3664 static void drmFoldDuplicatedDevices(drmDevicePtr local_devices[], int count)
3666 int node_type, i, j;
3668 for (i = 0; i < count; i++) {
3669 for (j = i + 1; j < count; j++) {
3670 if (drmDevicesEqual(local_devices[i], local_devices[j])) {
3671 local_devices[i]->available_nodes |= local_devices[j]->available_nodes;
3672 node_type = log2(local_devices[j]->available_nodes);
3673 memcpy(local_devices[i]->nodes[node_type],
3674 local_devices[j]->nodes[node_type], drmGetMaxNodeName());
3675 drmFreeDevice(&local_devices[j]);
3681 /* Check that the given flags are valid returning 0 on success */
3683 drm_device_validate_flags(uint32_t flags)
3685 return (flags & ~DRM_DEVICE_GET_PCI_REVISION);
3689 * Get information about the opened drm device
3691 * \param fd file descriptor of the drm device
3692 * \param flags feature/behaviour bitmask
3693 * \param device the address of a drmDevicePtr where the information
3694 * will be allocated in stored
3696 * \return zero on success, negative error code otherwise.
3698 * \note Unlike drmGetDevice it does not retrieve the pci device revision field
3699 * unless the DRM_DEVICE_GET_PCI_REVISION \p flag is set.
3701 int drmGetDevice2(int fd, uint32_t flags, drmDevicePtr *device)
3705 * DRI device nodes on OpenBSD are not in their own directory, they reside
3706 * in /dev along with a large number of statically generated /dev nodes.
3707 * Avoid stat'ing all of /dev needlessly by implementing this custom path.
3711 char node[PATH_MAX + 1];
3712 const char *dev_name;
3713 int node_type, subsystem_type;
3714 int maj, min, n, ret, base;
3716 if (fd == -1 || device == NULL)
3719 if (fstat(fd, &sbuf))
3722 maj = major(sbuf.st_rdev);
3723 min = minor(sbuf.st_rdev);
3725 if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
3728 node_type = drmGetMinorType(min);
3729 if (node_type == -1)
3732 switch (node_type) {
3733 case DRM_NODE_PRIMARY:
3734 dev_name = DRM_DEV_NAME;
3736 case DRM_NODE_CONTROL:
3737 dev_name = DRM_CONTROL_DEV_NAME;
3739 case DRM_NODE_RENDER:
3740 dev_name = DRM_RENDER_DEV_NAME;
3746 base = drmGetMinorBase(node_type);
3750 n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min - base);
3751 if (n == -1 || n >= PATH_MAX)
3753 if (stat(node, &sbuf))
3756 subsystem_type = drmParseSubsystemType(maj, min);
3757 if (subsystem_type != DRM_BUS_PCI)
3760 ret = drmProcessPciDevice(&d, node, node_type, maj, min, true, flags);
3768 drmDevicePtr *local_devices;
3771 struct dirent *dent;
3773 char node[PATH_MAX + 1];
3774 int node_type, subsystem_type;
3776 int ret, i, node_count;
3780 if (drm_device_validate_flags(flags))
3783 if (fd == -1 || device == NULL)
3786 if (fstat(fd, &sbuf))
3789 find_rdev = sbuf.st_rdev;
3790 maj = major(sbuf.st_rdev);
3791 min = minor(sbuf.st_rdev);
3793 if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
3796 subsystem_type = drmParseSubsystemType(maj, min);
3798 local_devices = calloc(max_count, sizeof(drmDevicePtr));
3799 if (local_devices == NULL)
3802 sysdir = opendir(DRM_DIR_NAME);
3809 while ((dent = readdir(sysdir))) {
3810 node_type = drmGetNodeType(dent->d_name);
3814 snprintf(node, PATH_MAX, "%s/%s", DRM_DIR_NAME, dent->d_name);
3815 if (stat(node, &sbuf))
3818 maj = major(sbuf.st_rdev);
3819 min = minor(sbuf.st_rdev);
3821 if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
3824 if (drmParseSubsystemType(maj, min) != subsystem_type)
3827 switch (subsystem_type) {
3829 ret = drmProcessPciDevice(&d, node, node_type, maj, min, true, flags);
3836 ret = drmProcessUsbDevice(&d, node, node_type, maj, min, true, flags);
3842 case DRM_BUS_PLATFORM:
3843 ret = drmProcessPlatformDevice(&d, node, node_type, maj, min, true, flags);
3849 case DRM_BUS_HOST1X:
3850 ret = drmProcessHost1xDevice(&d, node, node_type, maj, min, true, flags);
3860 if (i >= max_count) {
3864 temp = realloc(local_devices, max_count * sizeof(drmDevicePtr));
3867 local_devices = temp;
3870 /* store target at local_devices[0] for ease to use below */
3871 if (find_rdev == sbuf.st_rdev && i) {
3872 local_devices[i] = local_devices[0];
3873 local_devices[0] = d;
3876 local_devices[i] = d;
3881 drmFoldDuplicatedDevices(local_devices, node_count);
3883 *device = local_devices[0];
3884 drmFreeDevices(&local_devices[1], node_count - 1);
3887 free(local_devices);
3888 if (*device == NULL)
3893 drmFreeDevices(local_devices, i);
3897 free(local_devices);
3903 * Get information about the opened drm device
3905 * \param fd file descriptor of the drm device
3906 * \param device the address of a drmDevicePtr where the information
3907 * will be allocated in stored
3909 * \return zero on success, negative error code otherwise.
3911 int drmGetDevice(int fd, drmDevicePtr *device)
3913 return drmGetDevice2(fd, DRM_DEVICE_GET_PCI_REVISION, device);
3917 * Get drm devices on the system
3919 * \param flags feature/behaviour bitmask
3920 * \param devices the array of devices with drmDevicePtr elements
3921 * can be NULL to get the device number first
3922 * \param max_devices the maximum number of devices for the array
3924 * \return on error - negative error code,
3925 * if devices is NULL - total number of devices available on the system,
3926 * alternatively the number of devices stored in devices[], which is
3927 * capped by the max_devices.
3929 * \note Unlike drmGetDevices it does not retrieve the pci device revision field
3930 * unless the DRM_DEVICE_GET_PCI_REVISION \p flag is set.
3932 int drmGetDevices2(uint32_t flags, drmDevicePtr devices[], int max_devices)
3934 drmDevicePtr *local_devices;
3935 drmDevicePtr device;
3937 struct dirent *dent;
3939 char node[PATH_MAX + 1];
3940 int node_type, subsystem_type;
3942 int ret, i, node_count, device_count;
3945 if (drm_device_validate_flags(flags))
3948 local_devices = calloc(max_count, sizeof(drmDevicePtr));
3949 if (local_devices == NULL)
3952 sysdir = opendir(DRM_DIR_NAME);
3959 while ((dent = readdir(sysdir))) {
3960 node_type = drmGetNodeType(dent->d_name);
3964 snprintf(node, PATH_MAX, "%s/%s", DRM_DIR_NAME, dent->d_name);
3965 if (stat(node, &sbuf))
3968 maj = major(sbuf.st_rdev);
3969 min = minor(sbuf.st_rdev);
3971 if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
3974 subsystem_type = drmParseSubsystemType(maj, min);
3976 if (subsystem_type < 0)
3979 switch (subsystem_type) {
3981 ret = drmProcessPciDevice(&device, node, node_type,
3982 maj, min, devices != NULL, flags);
3989 ret = drmProcessUsbDevice(&device, node, node_type, maj, min,
3990 devices != NULL, flags);
3996 case DRM_BUS_PLATFORM:
3997 ret = drmProcessPlatformDevice(&device, node, node_type, maj, min,
3998 devices != NULL, flags);
4004 case DRM_BUS_HOST1X:
4005 ret = drmProcessHost1xDevice(&device, node, node_type, maj, min,
4006 devices != NULL, flags);
4016 if (i >= max_count) {
4020 temp = realloc(local_devices, max_count * sizeof(drmDevicePtr));
4023 local_devices = temp;
4026 local_devices[i] = device;
4031 drmFoldDuplicatedDevices(local_devices, node_count);
4034 for (i = 0; i < node_count; i++) {
4035 if (!local_devices[i])
4038 if ((devices != NULL) && (device_count < max_devices))
4039 devices[device_count] = local_devices[i];
4041 drmFreeDevice(&local_devices[i]);
4047 free(local_devices);
4048 return device_count;
4051 drmFreeDevices(local_devices, i);
4055 free(local_devices);
4060 * Get drm devices on the system
4062 * \param devices the array of devices with drmDevicePtr elements
4063 * can be NULL to get the device number first
4064 * \param max_devices the maximum number of devices for the array
4066 * \return on error - negative error code,
4067 * if devices is NULL - total number of devices available on the system,
4068 * alternatively the number of devices stored in devices[], which is
4069 * capped by the max_devices.
4071 int drmGetDevices(drmDevicePtr devices[], int max_devices)
4073 return drmGetDevices2(DRM_DEVICE_GET_PCI_REVISION, devices, max_devices);
4076 char *drmGetDeviceNameFromFd2(int fd)
4080 char path[PATH_MAX + 1], *value;
4081 unsigned int maj, min;
4083 if (fstat(fd, &sbuf))
4086 maj = major(sbuf.st_rdev);
4087 min = minor(sbuf.st_rdev);
4089 if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
4092 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d", maj, min);
4094 value = sysfs_uevent_get(path, "DEVNAME");
4098 snprintf(path, sizeof(path), "/dev/%s", value);
4101 return strdup(path);
4104 char node[PATH_MAX + 1];
4105 const char *dev_name;
4107 int maj, min, n, base;
4109 if (fstat(fd, &sbuf))
4112 maj = major(sbuf.st_rdev);
4113 min = minor(sbuf.st_rdev);
4115 if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
4118 node_type = drmGetMinorType(min);
4119 if (node_type == -1)
4122 switch (node_type) {
4123 case DRM_NODE_PRIMARY:
4124 dev_name = DRM_DEV_NAME;
4126 case DRM_NODE_CONTROL:
4127 dev_name = DRM_CONTROL_DEV_NAME;
4129 case DRM_NODE_RENDER:
4130 dev_name = DRM_RENDER_DEV_NAME;
4136 base = drmGetMinorBase(node_type);
4140 n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min - base);
4141 if (n == -1 || n >= PATH_MAX)
4144 return strdup(node);
4148 int drmSyncobjCreate(int fd, uint32_t flags, uint32_t *handle)
4150 struct drm_syncobj_create args;
4156 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_CREATE, &args);
4159 *handle = args.handle;
4163 int drmSyncobjDestroy(int fd, uint32_t handle)
4165 struct drm_syncobj_destroy args;
4168 args.handle = handle;
4169 return drmIoctl(fd, DRM_IOCTL_SYNCOBJ_DESTROY, &args);
4172 int drmSyncobjHandleToFD(int fd, uint32_t handle, int *obj_fd)
4174 struct drm_syncobj_handle args;
4179 args.handle = handle;
4180 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD, &args);
4187 int drmSyncobjFDToHandle(int fd, int obj_fd, uint32_t *handle)
4189 struct drm_syncobj_handle args;
4195 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE, &args);
4198 *handle = args.handle;
4202 int drmSyncobjImportSyncFile(int fd, uint32_t handle, int sync_file_fd)
4204 struct drm_syncobj_handle args;
4207 args.fd = sync_file_fd;
4208 args.handle = handle;
4209 args.flags = DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE;
4210 return drmIoctl(fd, DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE, &args);
4213 int drmSyncobjExportSyncFile(int fd, uint32_t handle, int *sync_file_fd)
4215 struct drm_syncobj_handle args;
4220 args.handle = handle;
4221 args.flags = DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE;
4222 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD, &args);
4225 *sync_file_fd = args.fd;