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.
48 #include <sys/types.h>
50 #define stat_t struct stat
51 #include <sys/ioctl.h>
55 #include <sys/mkdev.h>
57 #ifdef MAJOR_IN_SYSMACROS
58 #include <sys/sysmacros.h>
61 #include <sys/sysctl.h>
66 #if defined(__FreeBSD__)
67 #include <sys/param.h>
68 #include <sys/pciio.h>
71 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
73 /* Not all systems have MAP_FAILED defined */
75 #define MAP_FAILED ((void *)-1)
79 #include "libdrm_macros.h"
80 #include "drm_fourcc.h"
82 #include "util_math.h"
98 #endif /* __OpenBSD__ */
101 #define DRM_MAJOR 226 /* Linux */
104 #if defined(__OpenBSD__) || defined(__DragonFly__)
112 uint16_t subvendor_id;
113 uint16_t subdevice_id;
117 #define DRM_IOCTL_GET_PCIINFO DRM_IOR(0x15, struct drm_pciinfo)
120 #define DRM_MSG_VERBOSITY 3
122 #define memclear(s) memset(&s, 0, sizeof(s))
124 static drmServerInfoPtr drm_server_info;
126 static bool drmNodeIsDRM(int maj, int min);
127 static char *drmGetMinorNameForFD(int fd, int type);
129 #define DRM_MODIFIER(v, f, f_name) \
130 .modifier = DRM_FORMAT_MOD_##v ## _ ##f, \
131 .modifier_name = #f_name
133 #define DRM_MODIFIER_INVALID(v, f_name) \
134 .modifier = DRM_FORMAT_MOD_INVALID, .modifier_name = #f_name
136 #define DRM_MODIFIER_LINEAR(v, f_name) \
137 .modifier = DRM_FORMAT_MOD_LINEAR, .modifier_name = #f_name
139 /* Intel is abit special as the format doesn't follow other vendors naming
141 #define DRM_MODIFIER_INTEL(f, f_name) \
142 .modifier = I915_FORMAT_MOD_##f, .modifier_name = #f_name
144 struct drmFormatModifierInfo {
146 const char *modifier_name;
149 struct drmFormatModifierVendorInfo {
151 const char *vendor_name;
154 #include "generated_static_table_fourcc.h"
156 struct drmVendorInfo {
158 char *(*vendor_cb)(uint64_t modifier);
161 struct drmFormatVendorModifierInfo {
163 const char *modifier_name;
167 drmGetFormatModifierNameFromArm(uint64_t modifier);
170 drmGetFormatModifierNameFromNvidia(uint64_t modifier);
173 drmGetFormatModifierNameFromAmd(uint64_t modifier);
176 drmGetFormatModifierNameFromAmlogic(uint64_t modifier);
179 drmGetFormatModifierNameFromVivante(uint64_t modifier);
181 static const struct drmVendorInfo modifier_format_vendor_table[] = {
182 { DRM_FORMAT_MOD_VENDOR_ARM, drmGetFormatModifierNameFromArm },
183 { DRM_FORMAT_MOD_VENDOR_NVIDIA, drmGetFormatModifierNameFromNvidia },
184 { DRM_FORMAT_MOD_VENDOR_AMD, drmGetFormatModifierNameFromAmd },
185 { DRM_FORMAT_MOD_VENDOR_AMLOGIC, drmGetFormatModifierNameFromAmlogic },
186 { DRM_FORMAT_MOD_VENDOR_VIVANTE, drmGetFormatModifierNameFromVivante },
189 #ifndef AFBC_FORMAT_MOD_MODE_VALUE_MASK
190 #define AFBC_FORMAT_MOD_MODE_VALUE_MASK 0x000fffffffffffffULL
193 static const struct drmFormatVendorModifierInfo arm_mode_value_table[] = {
194 { AFBC_FORMAT_MOD_YTR, "YTR" },
195 { AFBC_FORMAT_MOD_SPLIT, "SPLIT" },
196 { AFBC_FORMAT_MOD_SPARSE, "SPARSE" },
197 { AFBC_FORMAT_MOD_CBR, "CBR" },
198 { AFBC_FORMAT_MOD_TILED, "TILED" },
199 { AFBC_FORMAT_MOD_SC, "SC" },
200 { AFBC_FORMAT_MOD_DB, "DB" },
201 { AFBC_FORMAT_MOD_BCH, "BCH" },
202 { AFBC_FORMAT_MOD_USM, "USM" },
205 static bool is_x_t_amd_gfx9_tile(uint64_t tile)
208 case AMD_FMT_MOD_TILE_GFX9_64K_S_X:
209 case AMD_FMT_MOD_TILE_GFX9_64K_D_X:
210 case AMD_FMT_MOD_TILE_GFX9_64K_R_X:
218 drmGetAfbcFormatModifierNameFromArm(uint64_t modifier, FILE *fp)
220 uint64_t mode_value = modifier & AFBC_FORMAT_MOD_MODE_VALUE_MASK;
221 uint64_t block_size = mode_value & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK;
223 const char *block = NULL;
224 const char *mode = NULL;
225 bool did_print_mode = false;
227 /* add block, can only have a (single) block */
228 switch (block_size) {
229 case AFBC_FORMAT_MOD_BLOCK_SIZE_16x16:
232 case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8:
235 case AFBC_FORMAT_MOD_BLOCK_SIZE_64x4:
238 case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8_64x4:
247 fprintf(fp, "BLOCK_SIZE=%s,", block);
250 for (unsigned int i = 0; i < ARRAY_SIZE(arm_mode_value_table); i++) {
251 if (arm_mode_value_table[i].modifier & mode_value) {
252 mode = arm_mode_value_table[i].modifier_name;
253 if (!did_print_mode) {
254 fprintf(fp, "MODE=%s", mode);
255 did_print_mode = true;
257 fprintf(fp, "|%s", mode);
266 drmGetAfrcFormatModifierNameFromArm(uint64_t modifier, FILE *fp)
269 for (unsigned int i = 0; i < 2; ++i) {
270 uint64_t coding_unit_block =
271 (modifier >> (i * 4)) & AFRC_FORMAT_MOD_CU_SIZE_MASK;
272 const char *coding_unit_size = NULL;
274 switch (coding_unit_block) {
275 case AFRC_FORMAT_MOD_CU_SIZE_16:
276 coding_unit_size = "CU_16";
278 case AFRC_FORMAT_MOD_CU_SIZE_24:
279 coding_unit_size = "CU_24";
281 case AFRC_FORMAT_MOD_CU_SIZE_32:
282 coding_unit_size = "CU_32";
286 if (!coding_unit_size) {
294 fprintf(fp, "P0=%s,", coding_unit_size);
296 fprintf(fp, "P12=%s,", coding_unit_size);
301 (modifier & AFRC_FORMAT_MOD_LAYOUT_SCAN) == AFRC_FORMAT_MOD_LAYOUT_SCAN;
311 drmGetFormatModifierNameFromArm(uint64_t modifier)
313 uint64_t type = (modifier >> 52) & 0xf;
317 char *modifier_name = NULL;
320 fp = open_memstream(&modifier_name, &size);
325 case DRM_FORMAT_MOD_ARM_TYPE_AFBC:
326 result = drmGetAfbcFormatModifierNameFromArm(modifier, fp);
328 case DRM_FORMAT_MOD_ARM_TYPE_AFRC:
329 result = drmGetAfrcFormatModifierNameFromArm(modifier, fp);
331 /* misc type is already handled by the static table */
332 case DRM_FORMAT_MOD_ARM_TYPE_MISC:
344 return modifier_name;
348 drmGetFormatModifierNameFromNvidia(uint64_t modifier)
350 uint64_t height, kind, gen, sector, compression;
352 height = modifier & 0xf;
353 kind = (modifier >> 12) & 0xff;
355 gen = (modifier >> 20) & 0x3;
356 sector = (modifier >> 22) & 0x1;
357 compression = (modifier >> 23) & 0x7;
359 /* just in case there could other simpler modifiers, not yet added, avoid
360 * testing against TEGRA_TILE */
361 if ((modifier & 0x10) == 0x10) {
363 asprintf(&mod_nvidia, "BLOCK_LINEAR_2D,HEIGHT=%"PRIu64",KIND=%"PRIu64","
364 "GEN=%"PRIu64",SECTOR=%"PRIu64",COMPRESSION=%"PRIu64"", height,
365 kind, gen, sector, compression);
373 drmGetFormatModifierNameFromAmdDcc(uint64_t modifier, FILE *fp)
375 uint64_t dcc_max_compressed_block =
376 AMD_FMT_MOD_GET(DCC_MAX_COMPRESSED_BLOCK, modifier);
377 uint64_t dcc_retile = AMD_FMT_MOD_GET(DCC_RETILE, modifier);
379 const char *dcc_max_compressed_block_str = NULL;
384 fprintf(fp, ",DCC_RETILE");
386 if (!dcc_retile && AMD_FMT_MOD_GET(DCC_PIPE_ALIGN, modifier))
387 fprintf(fp, ",DCC_PIPE_ALIGN");
389 if (AMD_FMT_MOD_GET(DCC_INDEPENDENT_64B, modifier))
390 fprintf(fp, ",DCC_INDEPENDENT_64B");
392 if (AMD_FMT_MOD_GET(DCC_INDEPENDENT_128B, modifier))
393 fprintf(fp, ",DCC_INDEPENDENT_128B");
395 switch (dcc_max_compressed_block) {
396 case AMD_FMT_MOD_DCC_BLOCK_64B:
397 dcc_max_compressed_block_str = "64B";
399 case AMD_FMT_MOD_DCC_BLOCK_128B:
400 dcc_max_compressed_block_str = "128B";
402 case AMD_FMT_MOD_DCC_BLOCK_256B:
403 dcc_max_compressed_block_str = "256B";
407 if (dcc_max_compressed_block_str)
408 fprintf(fp, ",DCC_MAX_COMPRESSED_BLOCK=%s",
409 dcc_max_compressed_block_str);
411 if (AMD_FMT_MOD_GET(DCC_CONSTANT_ENCODE, modifier))
412 fprintf(fp, ",DCC_CONSTANT_ENCODE");
416 drmGetFormatModifierNameFromAmdTile(uint64_t modifier, FILE *fp)
418 uint64_t pipe_xor_bits, bank_xor_bits, packers, rb;
419 uint64_t pipe, pipe_align, dcc, dcc_retile, tile_version;
421 pipe_align = AMD_FMT_MOD_GET(DCC_PIPE_ALIGN, modifier);
422 pipe_xor_bits = AMD_FMT_MOD_GET(PIPE_XOR_BITS, modifier);
423 dcc = AMD_FMT_MOD_GET(DCC, modifier);
424 dcc_retile = AMD_FMT_MOD_GET(DCC_RETILE, modifier);
425 tile_version = AMD_FMT_MOD_GET(TILE_VERSION, modifier);
427 fprintf(fp, ",PIPE_XOR_BITS=%"PRIu64, pipe_xor_bits);
429 if (tile_version == AMD_FMT_MOD_TILE_VER_GFX9) {
430 bank_xor_bits = AMD_FMT_MOD_GET(BANK_XOR_BITS, modifier);
431 fprintf(fp, ",BANK_XOR_BITS=%"PRIu64, bank_xor_bits);
434 if (tile_version == AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS) {
435 packers = AMD_FMT_MOD_GET(PACKERS, modifier);
436 fprintf(fp, ",PACKERS=%"PRIu64, packers);
439 if (dcc && tile_version == AMD_FMT_MOD_TILE_VER_GFX9) {
440 rb = AMD_FMT_MOD_GET(RB, modifier);
441 fprintf(fp, ",RB=%"PRIu64, rb);
444 if (dcc && tile_version == AMD_FMT_MOD_TILE_VER_GFX9 &&
445 (dcc_retile || pipe_align)) {
446 pipe = AMD_FMT_MOD_GET(PIPE, modifier);
447 fprintf(fp, ",PIPE_%"PRIu64, pipe);
452 drmGetFormatModifierNameFromAmd(uint64_t modifier)
454 uint64_t tile, tile_version, dcc;
456 char *mod_amd = NULL;
459 const char *str_tile = NULL;
460 const char *str_tile_version = NULL;
462 tile = AMD_FMT_MOD_GET(TILE, modifier);
463 tile_version = AMD_FMT_MOD_GET(TILE_VERSION, modifier);
464 dcc = AMD_FMT_MOD_GET(DCC, modifier);
466 fp = open_memstream(&mod_amd, &size);
471 switch (tile_version) {
472 case AMD_FMT_MOD_TILE_VER_GFX9:
473 str_tile_version = "GFX9";
475 case AMD_FMT_MOD_TILE_VER_GFX10:
476 str_tile_version = "GFX10";
478 case AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS:
479 str_tile_version = "GFX10_RBPLUS";
481 case AMD_FMT_MOD_TILE_VER_GFX11:
482 str_tile_version = "GFX11";
486 if (str_tile_version) {
487 fprintf(fp, "%s", str_tile_version);
496 case AMD_FMT_MOD_TILE_GFX9_64K_S:
497 str_tile = "GFX9_64K_S";
499 case AMD_FMT_MOD_TILE_GFX9_64K_D:
500 str_tile = "GFX9_64K_D";
502 case AMD_FMT_MOD_TILE_GFX9_64K_S_X:
503 str_tile = "GFX9_64K_S_X";
505 case AMD_FMT_MOD_TILE_GFX9_64K_D_X:
506 str_tile = "GFX9_64K_D_X";
508 case AMD_FMT_MOD_TILE_GFX9_64K_R_X:
509 str_tile = "GFX9_64K_R_X";
511 case AMD_FMT_MOD_TILE_GFX11_256K_R_X:
512 str_tile = "GFX11_256K_R_X";
517 fprintf(fp, ",%s", str_tile);
520 drmGetFormatModifierNameFromAmdDcc(modifier, fp);
522 if (tile_version >= AMD_FMT_MOD_TILE_VER_GFX9 && is_x_t_amd_gfx9_tile(tile))
523 drmGetFormatModifierNameFromAmdTile(modifier, fp);
530 drmGetFormatModifierNameFromAmlogic(uint64_t modifier)
532 uint64_t layout = modifier & 0xff;
533 uint64_t options = (modifier >> 8) & 0xff;
534 char *mod_amlogic = NULL;
536 const char *layout_str;
537 const char *opts_str;
540 case AMLOGIC_FBC_LAYOUT_BASIC:
541 layout_str = "BASIC";
543 case AMLOGIC_FBC_LAYOUT_SCATTER:
544 layout_str = "SCATTER";
547 layout_str = "INVALID_LAYOUT";
551 if (options & AMLOGIC_FBC_OPTION_MEM_SAVING)
552 opts_str = "MEM_SAVING";
556 asprintf(&mod_amlogic, "FBC,LAYOUT=%s,OPTIONS=%s", layout_str, opts_str);
561 drmGetFormatModifierNameFromVivante(uint64_t modifier)
563 const char *color_tiling, *tile_status, *compression;
564 char *mod_vivante = NULL;
566 switch (modifier & VIVANTE_MOD_TS_MASK) {
570 case VIVANTE_MOD_TS_64_4:
571 tile_status = ",TS=64B_4";
573 case VIVANTE_MOD_TS_64_2:
574 tile_status = ",TS=64B_2";
576 case VIVANTE_MOD_TS_128_4:
577 tile_status = ",TS=128B_4";
579 case VIVANTE_MOD_TS_256_4:
580 tile_status = ",TS=256B_4";
583 tile_status = ",TS=UNKNOWN";
587 switch (modifier & VIVANTE_MOD_COMP_MASK) {
591 case VIVANTE_MOD_COMP_DEC400:
592 compression = ",COMP=DEC400";
595 compression = ",COMP=UNKNOWN";
599 switch (modifier & ~VIVANTE_MOD_EXT_MASK) {
601 color_tiling = "LINEAR";
603 case DRM_FORMAT_MOD_VIVANTE_TILED:
604 color_tiling = "TILED";
606 case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED:
607 color_tiling = "SUPER_TILED";
609 case DRM_FORMAT_MOD_VIVANTE_SPLIT_TILED:
610 color_tiling = "SPLIT_TILED";
612 case DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED:
613 color_tiling = "SPLIT_SUPER_TILED";
616 color_tiling = "UNKNOWN";
620 asprintf(&mod_vivante, "%s%s%s", color_tiling, tile_status, compression);
624 static unsigned log2_int(unsigned x)
632 if ((unsigned)(1 << l) > x) {
640 drm_public void drmSetServerInfo(drmServerInfoPtr info)
642 drm_server_info = info;
646 * Output a message to stderr.
648 * \param format printf() like format string.
651 * This function is a wrapper around vfprintf().
654 static int DRM_PRINTFLIKE(1, 0)
655 drmDebugPrint(const char *format, va_list ap)
657 return vfprintf(stderr, format, ap);
661 drmMsg(const char *format, ...)
665 if (((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) ||
666 (drm_server_info && drm_server_info->debug_print))
668 va_start(ap, format);
669 if (drm_server_info) {
670 drm_server_info->debug_print(format,ap);
672 drmDebugPrint(format, ap);
678 static void *drmHashTable = NULL; /* Context switch callbacks */
680 drm_public void *drmGetHashTable(void)
685 drm_public void *drmMalloc(int size)
687 return calloc(1, size);
690 drm_public void drmFree(void *pt)
696 * Call ioctl, restarting if it is interrupted
699 drmIoctl(int fd, unsigned long request, void *arg)
704 ret = ioctl(fd, request, arg);
705 } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
709 static unsigned long drmGetKeyFromFd(int fd)
718 drm_public drmHashEntry *drmGetEntry(int fd)
720 unsigned long key = drmGetKeyFromFd(fd);
725 drmHashTable = drmHashCreate();
727 if (drmHashLookup(drmHashTable, key, &value)) {
728 entry = drmMalloc(sizeof(*entry));
731 entry->tagTable = drmHashCreate();
732 drmHashInsert(drmHashTable, key, entry);
740 * Compare two busid strings
745 * \return 1 if matched.
748 * This function compares two bus ID strings. It understands the older
749 * PCI:b:d:f format and the newer pci:oooo:bb:dd.f format. In the format, o is
750 * domain, b is bus, d is device, f is function.
752 static int drmMatchBusID(const char *id1, const char *id2, int pci_domain_ok)
754 /* First, check if the IDs are exactly the same */
755 if (strcasecmp(id1, id2) == 0)
758 /* Try to match old/new-style PCI bus IDs. */
759 if (strncasecmp(id1, "pci", 3) == 0) {
760 unsigned int o1, b1, d1, f1;
761 unsigned int o2, b2, d2, f2;
764 ret = sscanf(id1, "pci:%04x:%02x:%02x.%u", &o1, &b1, &d1, &f1);
767 ret = sscanf(id1, "PCI:%u:%u:%u", &b1, &d1, &f1);
772 ret = sscanf(id2, "pci:%04x:%02x:%02x.%u", &o2, &b2, &d2, &f2);
775 ret = sscanf(id2, "PCI:%u:%u:%u", &b2, &d2, &f2);
780 /* If domains aren't properly supported by the kernel interface,
781 * just ignore them, which sucks less than picking a totally random
782 * card with "open by name"
787 if ((o1 != o2) || (b1 != b2) || (d1 != d2) || (f1 != f2))
796 * Handles error checking for chown call.
798 * \param path to file.
799 * \param id of the new owner.
800 * \param id of the new group.
802 * \return zero if success or -1 if failure.
805 * Checks for failure. If failure was caused by signal call chown again.
806 * If any other failure happened then it will output error message using
810 static int chown_check_return(const char *path, uid_t owner, gid_t group)
815 rv = chown(path, owner, group);
816 } while (rv != 0 && errno == EINTR);
821 drmMsg("Failed to change owner or group for file %s! %d: %s\n",
822 path, errno, strerror(errno));
827 static const char *drmGetDeviceName(int type)
830 case DRM_NODE_PRIMARY:
832 case DRM_NODE_RENDER:
833 return DRM_RENDER_DEV_NAME;
839 * Open the DRM device, creating it if necessary.
841 * \param dev major and minor numbers of the device.
842 * \param minor minor number of the device.
844 * \return a file descriptor on success, or a negative value on error.
847 * Assembles the device name from \p minor and opens it, creating the device
848 * special file node with the major and minor numbers specified by \p dev and
849 * parent directory if necessary and was called by root.
851 static int drmOpenDevice(dev_t dev, int minor, int type)
854 const char *dev_name = drmGetDeviceName(type);
855 char buf[DRM_NODE_NAME_MAX];
857 mode_t devmode = DRM_DEV_MODE, serv_mode;
860 int isroot = !geteuid();
861 uid_t user = DRM_DEV_UID;
862 gid_t group = DRM_DEV_GID;
868 sprintf(buf, dev_name, DRM_DIR_NAME, minor);
869 drmMsg("drmOpenDevice: node name is %s\n", buf);
871 if (drm_server_info && drm_server_info->get_perms) {
872 drm_server_info->get_perms(&serv_group, &serv_mode);
873 devmode = serv_mode ? serv_mode : DRM_DEV_MODE;
874 devmode &= ~(S_IXUSR|S_IXGRP|S_IXOTH);
878 if (stat(DRM_DIR_NAME, &st)) {
880 return DRM_ERR_NOT_ROOT;
881 mkdir(DRM_DIR_NAME, DRM_DEV_DIRMODE);
882 chown_check_return(DRM_DIR_NAME, 0, 0); /* root:root */
883 chmod(DRM_DIR_NAME, DRM_DEV_DIRMODE);
886 /* Check if the device node exists and create it if necessary. */
887 if (stat(buf, &st)) {
889 return DRM_ERR_NOT_ROOT;
891 mknod(buf, S_IFCHR | devmode, dev);
894 if (drm_server_info && drm_server_info->get_perms) {
895 group = ((int)serv_group >= 0) ? serv_group : DRM_DEV_GID;
896 chown_check_return(buf, user, group);
900 /* if we modprobed then wait for udev */
904 if (stat(DRM_DIR_NAME, &st)) {
908 if (udev_count == 50)
913 if (stat(buf, &st)) {
917 if (udev_count == 50)
924 fd = open(buf, O_RDWR | O_CLOEXEC);
925 drmMsg("drmOpenDevice: open result is %d, (%s)\n",
926 fd, fd < 0 ? strerror(errno) : "OK");
931 /* Check if the device node is not what we expect it to be, and recreate it
932 * and try again if so.
934 if (st.st_rdev != dev) {
936 return DRM_ERR_NOT_ROOT;
938 mknod(buf, S_IFCHR | devmode, dev);
939 if (drm_server_info && drm_server_info->get_perms) {
940 chown_check_return(buf, user, group);
944 fd = open(buf, O_RDWR | O_CLOEXEC);
945 drmMsg("drmOpenDevice: open result is %d, (%s)\n",
946 fd, fd < 0 ? strerror(errno) : "OK");
950 drmMsg("drmOpenDevice: Open failed\n");
958 * Open the DRM device
960 * \param minor device minor number.
961 * \param create allow to create the device if set.
963 * \return a file descriptor on success, or a negative value on error.
966 * Calls drmOpenDevice() if \p create is set, otherwise assembles the device
967 * name from \p minor and opens it.
969 static int drmOpenMinor(int minor, int create, int type)
972 char buf[DRM_NODE_NAME_MAX];
973 const char *dev_name = drmGetDeviceName(type);
976 return drmOpenDevice(makedev(DRM_MAJOR, minor), minor, type);
981 sprintf(buf, dev_name, DRM_DIR_NAME, minor);
982 if ((fd = open(buf, O_RDWR | O_CLOEXEC)) >= 0)
989 * Determine whether the DRM kernel driver has been loaded.
991 * \return 1 if the DRM driver is loaded, 0 otherwise.
994 * Determine the presence of the kernel driver by attempting to open the 0
995 * minor and get version information. For backward compatibility with older
996 * Linux implementations, /proc/dri is also checked.
998 drm_public int drmAvailable(void)
1000 drmVersionPtr version;
1004 if ((fd = drmOpenMinor(0, 1, DRM_NODE_PRIMARY)) < 0) {
1006 /* Try proc for backward Linux compatibility */
1007 if (!access("/proc/dri/0", R_OK))
1013 if ((version = drmGetVersion(fd))) {
1015 drmFreeVersion(version);
1022 static int drmGetMinorBase(int type)
1025 case DRM_NODE_PRIMARY:
1027 case DRM_NODE_RENDER:
1034 static int drmGetMinorType(int major, int minor)
1037 char name[SPECNAMELEN];
1040 if (!devname_r(makedev(major, minor), S_IFCHR, name, sizeof(name)))
1043 if (sscanf(name, "drm/%d", &id) != 1) {
1044 // If not in /dev/drm/ we have the type in the name
1045 if (sscanf(name, "dri/card%d\n", &id) >= 1)
1046 return DRM_NODE_PRIMARY;
1047 else if (sscanf(name, "dri/renderD%d\n", &id) >= 1)
1048 return DRM_NODE_RENDER;
1054 char path[DRM_NODE_NAME_MAX];
1055 const char *dev_name;
1058 for (i = DRM_NODE_PRIMARY; i < DRM_NODE_MAX; i++) {
1059 dev_name = drmGetDeviceName(i);
1062 snprintf(path, sizeof(path), dev_name, DRM_DIR_NAME, minor);
1063 if (!access(path, F_OK))
1070 static const char *drmGetMinorName(int type)
1073 case DRM_NODE_PRIMARY:
1074 return DRM_PRIMARY_MINOR_NAME;
1075 case DRM_NODE_RENDER:
1076 return DRM_RENDER_MINOR_NAME;
1083 * Open the device by bus ID.
1085 * \param busid bus ID.
1086 * \param type device node type.
1088 * \return a file descriptor on success, or a negative value on error.
1091 * This function attempts to open every possible minor (up to DRM_MAX_MINOR),
1092 * comparing the device bus ID with the one supplied.
1094 * \sa drmOpenMinor() and drmGetBusid().
1096 static int drmOpenByBusid(const char *busid, int type)
1098 int i, pci_domain_ok = 1;
1102 int base = drmGetMinorBase(type);
1107 drmMsg("drmOpenByBusid: Searching for BusID %s\n", busid);
1108 for (i = base; i < base + DRM_MAX_MINOR; i++) {
1109 fd = drmOpenMinor(i, 1, type);
1110 drmMsg("drmOpenByBusid: drmOpenMinor returns %d\n", fd);
1112 /* We need to try for 1.4 first for proper PCI domain support
1113 * and if that fails, we know the kernel is busted
1115 sv.drm_di_major = 1;
1116 sv.drm_di_minor = 4;
1117 sv.drm_dd_major = -1; /* Don't care */
1118 sv.drm_dd_minor = -1; /* Don't care */
1119 if (drmSetInterfaceVersion(fd, &sv)) {
1123 sv.drm_di_major = 1;
1124 sv.drm_di_minor = 1;
1125 sv.drm_dd_major = -1; /* Don't care */
1126 sv.drm_dd_minor = -1; /* Don't care */
1127 drmMsg("drmOpenByBusid: Interface 1.4 failed, trying 1.1\n");
1128 drmSetInterfaceVersion(fd, &sv);
1130 buf = drmGetBusid(fd);
1131 drmMsg("drmOpenByBusid: drmGetBusid reports %s\n", buf);
1132 if (buf && drmMatchBusID(buf, busid, pci_domain_ok)) {
1146 * Open the device by name.
1148 * \param name driver name.
1149 * \param type the device node type.
1151 * \return a file descriptor on success, or a negative value on error.
1154 * This function opens the first minor number that matches the driver name and
1155 * isn't already in use. If it's in use it then it will already have a bus ID
1158 * \sa drmOpenMinor(), drmGetVersion() and drmGetBusid().
1160 static int drmOpenByName(const char *name, int type)
1164 drmVersionPtr version;
1166 int base = drmGetMinorBase(type);
1172 * Open the first minor number that matches the driver name and isn't
1173 * already in use. If it's in use it will have a busid assigned already.
1175 for (i = base; i < base + DRM_MAX_MINOR; i++) {
1176 if ((fd = drmOpenMinor(i, 1, type)) >= 0) {
1177 if ((version = drmGetVersion(fd))) {
1178 if (!strcmp(version->name, name)) {
1179 drmFreeVersion(version);
1180 id = drmGetBusid(fd);
1181 drmMsg("drmGetBusid returned '%s'\n", id ? id : "NULL");
1190 drmFreeVersion(version);
1198 /* Backward-compatibility /proc support */
1199 for (i = 0; i < 8; i++) {
1200 char proc_name[64], buf[512];
1201 char *driver, *pt, *devstring;
1204 sprintf(proc_name, "/proc/dri/%d/name", i);
1205 if ((fd = open(proc_name, O_RDONLY)) >= 0) {
1206 retcode = read(fd, buf, sizeof(buf)-1);
1209 buf[retcode-1] = '\0';
1210 for (driver = pt = buf; *pt && *pt != ' '; ++pt)
1212 if (*pt) { /* Device is next */
1214 if (!strcmp(driver, name)) { /* Match */
1215 for (devstring = ++pt; *pt && *pt != ' '; ++pt)
1217 if (*pt) { /* Found busid */
1218 return drmOpenByBusid(++pt, type);
1219 } else { /* No busid */
1220 return drmOpenDevice(strtol(devstring, NULL, 0),i, type);
1234 * Open the DRM device.
1236 * Looks up the specified name and bus ID, and opens the device found. The
1237 * entry in /dev/dri is created if necessary and if called by root.
1239 * \param name driver name. Not referenced if bus ID is supplied.
1240 * \param busid bus ID. Zero if not known.
1242 * \return a file descriptor on success, or a negative value on error.
1245 * It calls drmOpenByBusid() if \p busid is specified or drmOpenByName()
1248 drm_public int drmOpen(const char *name, const char *busid)
1250 return drmOpenWithType(name, busid, DRM_NODE_PRIMARY);
1254 * Open the DRM device with specified type.
1256 * Looks up the specified name and bus ID, and opens the device found. The
1257 * entry in /dev/dri is created if necessary and if called by root.
1259 * \param name driver name. Not referenced if bus ID is supplied.
1260 * \param busid bus ID. Zero if not known.
1261 * \param type the device node type to open, PRIMARY or RENDER
1263 * \return a file descriptor on success, or a negative value on error.
1266 * It calls drmOpenByBusid() if \p busid is specified or drmOpenByName()
1269 drm_public int drmOpenWithType(const char *name, const char *busid, int type)
1271 if (name != NULL && drm_server_info &&
1272 drm_server_info->load_module && !drmAvailable()) {
1273 /* try to load the kernel module */
1274 if (!drm_server_info->load_module(name)) {
1275 drmMsg("[drm] failed to load kernel module \"%s\"\n", name);
1281 int fd = drmOpenByBusid(busid, type);
1287 return drmOpenByName(name, type);
1292 drm_public int drmOpenControl(int minor)
1297 drm_public int drmOpenRender(int minor)
1299 return drmOpenMinor(minor, 0, DRM_NODE_RENDER);
1303 * Free the version information returned by drmGetVersion().
1305 * \param v pointer to the version information.
1308 * It frees the memory pointed by \p %v as well as all the non-null strings
1311 drm_public void drmFreeVersion(drmVersionPtr v)
1323 * Free the non-public version information returned by the kernel.
1325 * \param v pointer to the version information.
1328 * Used by drmGetVersion() to free the memory pointed by \p %v as well as all
1329 * the non-null strings pointers in it.
1331 static void drmFreeKernelVersion(drm_version_t *v)
1343 * Copy version information.
1345 * \param d destination pointer.
1346 * \param s source pointer.
1349 * Used by drmGetVersion() to translate the information returned by the ioctl
1350 * interface in a private structure into the public structure counterpart.
1352 static void drmCopyVersion(drmVersionPtr d, const drm_version_t *s)
1354 d->version_major = s->version_major;
1355 d->version_minor = s->version_minor;
1356 d->version_patchlevel = s->version_patchlevel;
1357 d->name_len = s->name_len;
1358 d->name = strdup(s->name);
1359 d->date_len = s->date_len;
1360 d->date = strdup(s->date);
1361 d->desc_len = s->desc_len;
1362 d->desc = strdup(s->desc);
1367 * Query the driver version information.
1369 * \param fd file descriptor.
1371 * \return pointer to a drmVersion structure which should be freed with
1374 * \note Similar information is available via /proc/dri.
1377 * It gets the version information via successive DRM_IOCTL_VERSION ioctls,
1378 * first with zeros to get the string lengths, and then the actually strings.
1379 * It also null-terminates them since they might not be already.
1381 drm_public drmVersionPtr drmGetVersion(int fd)
1383 drmVersionPtr retval;
1384 drm_version_t *version = drmMalloc(sizeof(*version));
1386 if (drmIoctl(fd, DRM_IOCTL_VERSION, version)) {
1387 drmFreeKernelVersion(version);
1391 if (version->name_len)
1392 version->name = drmMalloc(version->name_len + 1);
1393 if (version->date_len)
1394 version->date = drmMalloc(version->date_len + 1);
1395 if (version->desc_len)
1396 version->desc = drmMalloc(version->desc_len + 1);
1398 if (drmIoctl(fd, DRM_IOCTL_VERSION, version)) {
1399 drmMsg("DRM_IOCTL_VERSION: %s\n", strerror(errno));
1400 drmFreeKernelVersion(version);
1404 /* The results might not be null-terminated strings, so terminate them. */
1405 if (version->name_len) version->name[version->name_len] = '\0';
1406 if (version->date_len) version->date[version->date_len] = '\0';
1407 if (version->desc_len) version->desc[version->desc_len] = '\0';
1409 retval = drmMalloc(sizeof(*retval));
1410 drmCopyVersion(retval, version);
1411 drmFreeKernelVersion(version);
1417 * Get version information for the DRM user space library.
1419 * This version number is driver independent.
1421 * \param fd file descriptor.
1423 * \return version information.
1426 * This function allocates and fills a drm_version structure with a hard coded
1429 drm_public drmVersionPtr drmGetLibVersion(int fd)
1431 drm_version_t *version = drmMalloc(sizeof(*version));
1434 * NOTE THIS MUST NOT GO ABOVE VERSION 1.X due to drivers needing it
1435 * revision 1.0.x = original DRM interface with no drmGetLibVersion
1436 * entry point and many drm<Device> extensions
1437 * revision 1.1.x = added drmCommand entry points for device extensions
1438 * added drmGetLibVersion to identify libdrm.a version
1439 * revision 1.2.x = added drmSetInterfaceVersion
1440 * modified drmOpen to handle both busid and name
1441 * revision 1.3.x = added server + memory manager
1443 version->version_major = 1;
1444 version->version_minor = 3;
1445 version->version_patchlevel = 0;
1447 return (drmVersionPtr)version;
1450 drm_public int drmGetCap(int fd, uint64_t capability, uint64_t *value)
1452 struct drm_get_cap cap;
1456 cap.capability = capability;
1458 ret = drmIoctl(fd, DRM_IOCTL_GET_CAP, &cap);
1466 drm_public int drmSetClientCap(int fd, uint64_t capability, uint64_t value)
1468 struct drm_set_client_cap cap;
1471 cap.capability = capability;
1474 return drmIoctl(fd, DRM_IOCTL_SET_CLIENT_CAP, &cap);
1478 * Free the bus ID information.
1480 * \param busid bus ID information string as given by drmGetBusid().
1483 * This function is just frees the memory pointed by \p busid.
1485 drm_public void drmFreeBusid(const char *busid)
1487 drmFree((void *)busid);
1492 * Get the bus ID of the device.
1494 * \param fd file descriptor.
1496 * \return bus ID string.
1499 * This function gets the bus ID via successive DRM_IOCTL_GET_UNIQUE ioctls to
1500 * get the string length and data, passing the arguments in a drm_unique
1503 drm_public char *drmGetBusid(int fd)
1509 if (drmIoctl(fd, DRM_IOCTL_GET_UNIQUE, &u))
1511 u.unique = drmMalloc(u.unique_len + 1);
1512 if (drmIoctl(fd, DRM_IOCTL_GET_UNIQUE, &u)) {
1516 u.unique[u.unique_len] = '\0';
1523 * Set the bus ID of the device.
1525 * \param fd file descriptor.
1526 * \param busid bus ID string.
1528 * \return zero on success, negative on failure.
1531 * This function is a wrapper around the DRM_IOCTL_SET_UNIQUE ioctl, passing
1532 * the arguments in a drm_unique structure.
1534 drm_public int drmSetBusid(int fd, const char *busid)
1539 u.unique = (char *)busid;
1540 u.unique_len = strlen(busid);
1542 if (drmIoctl(fd, DRM_IOCTL_SET_UNIQUE, &u)) {
1548 drm_public int drmGetMagic(int fd, drm_magic_t * magic)
1555 if (drmIoctl(fd, DRM_IOCTL_GET_MAGIC, &auth))
1557 *magic = auth.magic;
1561 drm_public int drmAuthMagic(int fd, drm_magic_t magic)
1567 if (drmIoctl(fd, DRM_IOCTL_AUTH_MAGIC, &auth))
1573 * Specifies a range of memory that is available for mapping by a
1576 * \param fd file descriptor.
1577 * \param offset usually the physical address. The actual meaning depends of
1578 * the \p type parameter. See below.
1579 * \param size of the memory in bytes.
1580 * \param type type of the memory to be mapped.
1581 * \param flags combination of several flags to modify the function actions.
1582 * \param handle will be set to a value that may be used as the offset
1583 * parameter for mmap().
1585 * \return zero on success or a negative value on error.
1587 * \par Mapping the frame buffer
1588 * For the frame buffer
1589 * - \p offset will be the physical address of the start of the frame buffer,
1590 * - \p size will be the size of the frame buffer in bytes, and
1591 * - \p type will be DRM_FRAME_BUFFER.
1594 * The area mapped will be uncached. If MTRR support is available in the
1595 * kernel, the frame buffer area will be set to write combining.
1597 * \par Mapping the MMIO register area
1598 * For the MMIO register area,
1599 * - \p offset will be the physical address of the start of the register area,
1600 * - \p size will be the size of the register area bytes, and
1601 * - \p type will be DRM_REGISTERS.
1603 * The area mapped will be uncached.
1605 * \par Mapping the SAREA
1607 * - \p offset will be ignored and should be set to zero,
1608 * - \p size will be the desired size of the SAREA in bytes,
1609 * - \p type will be DRM_SHM.
1612 * A shared memory area of the requested size will be created and locked in
1613 * kernel memory. This area may be mapped into client-space by using the handle
1616 * \note May only be called by root.
1619 * This function is a wrapper around the DRM_IOCTL_ADD_MAP ioctl, passing
1620 * the arguments in a drm_map structure.
1622 drm_public int drmAddMap(int fd, drm_handle_t offset, drmSize size, drmMapType type,
1623 drmMapFlags flags, drm_handle_t *handle)
1628 map.offset = offset;
1630 map.type = (enum drm_map_type)type;
1631 map.flags = (enum drm_map_flags)flags;
1632 if (drmIoctl(fd, DRM_IOCTL_ADD_MAP, &map))
1635 *handle = (drm_handle_t)(uintptr_t)map.handle;
1639 drm_public int drmRmMap(int fd, drm_handle_t handle)
1644 map.handle = (void *)(uintptr_t)handle;
1646 if(drmIoctl(fd, DRM_IOCTL_RM_MAP, &map))
1652 * Make buffers available for DMA transfers.
1654 * \param fd file descriptor.
1655 * \param count number of buffers.
1656 * \param size size of each buffer.
1657 * \param flags buffer allocation flags.
1658 * \param agp_offset offset in the AGP aperture
1660 * \return number of buffers allocated, negative on error.
1663 * This function is a wrapper around DRM_IOCTL_ADD_BUFS ioctl.
1667 drm_public int drmAddBufs(int fd, int count, int size, drmBufDescFlags flags,
1670 drm_buf_desc_t request;
1673 request.count = count;
1674 request.size = size;
1675 request.flags = (int)flags;
1676 request.agp_start = agp_offset;
1678 if (drmIoctl(fd, DRM_IOCTL_ADD_BUFS, &request))
1680 return request.count;
1683 drm_public int drmMarkBufs(int fd, double low, double high)
1685 drm_buf_info_t info;
1690 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info))
1696 if (!(info.list = drmMalloc(info.count * sizeof(*info.list))))
1699 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info)) {
1700 int retval = -errno;
1705 for (i = 0; i < info.count; i++) {
1706 info.list[i].low_mark = low * info.list[i].count;
1707 info.list[i].high_mark = high * info.list[i].count;
1708 if (drmIoctl(fd, DRM_IOCTL_MARK_BUFS, &info.list[i])) {
1709 int retval = -errno;
1722 * \param fd file descriptor.
1723 * \param count number of buffers to free.
1724 * \param list list of buffers to be freed.
1726 * \return zero on success, or a negative value on failure.
1728 * \note This function is primarily used for debugging.
1731 * This function is a wrapper around the DRM_IOCTL_FREE_BUFS ioctl, passing
1732 * the arguments in a drm_buf_free structure.
1734 drm_public int drmFreeBufs(int fd, int count, int *list)
1736 drm_buf_free_t request;
1739 request.count = count;
1740 request.list = list;
1741 if (drmIoctl(fd, DRM_IOCTL_FREE_BUFS, &request))
1750 * \param fd file descriptor.
1753 * This function closes the file descriptor.
1755 drm_public int drmClose(int fd)
1757 unsigned long key = drmGetKeyFromFd(fd);
1758 drmHashEntry *entry = drmGetEntry(fd);
1760 drmHashDestroy(entry->tagTable);
1763 entry->tagTable = NULL;
1765 drmHashDelete(drmHashTable, key);
1773 * Map a region of memory.
1775 * \param fd file descriptor.
1776 * \param handle handle returned by drmAddMap().
1777 * \param size size in bytes. Must match the size used by drmAddMap().
1778 * \param address will contain the user-space virtual address where the mapping
1781 * \return zero on success, or a negative value on failure.
1784 * This function is a wrapper for mmap().
1786 drm_public int drmMap(int fd, drm_handle_t handle, drmSize size,
1787 drmAddressPtr address)
1789 static unsigned long pagesize_mask = 0;
1795 pagesize_mask = getpagesize() - 1;
1797 size = (size + pagesize_mask) & ~pagesize_mask;
1799 *address = drm_mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, handle);
1800 if (*address == MAP_FAILED)
1807 * Unmap mappings obtained with drmMap().
1809 * \param address address as given by drmMap().
1810 * \param size size in bytes. Must match the size used by drmMap().
1812 * \return zero on success, or a negative value on failure.
1815 * This function is a wrapper for munmap().
1817 drm_public int drmUnmap(drmAddress address, drmSize size)
1819 return drm_munmap(address, size);
1822 drm_public drmBufInfoPtr drmGetBufInfo(int fd)
1824 drm_buf_info_t info;
1825 drmBufInfoPtr retval;
1830 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info))
1834 if (!(info.list = drmMalloc(info.count * sizeof(*info.list))))
1837 if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info)) {
1842 retval = drmMalloc(sizeof(*retval));
1843 retval->count = info.count;
1844 if (!(retval->list = drmMalloc(info.count * sizeof(*retval->list)))) {
1850 for (i = 0; i < info.count; i++) {
1851 retval->list[i].count = info.list[i].count;
1852 retval->list[i].size = info.list[i].size;
1853 retval->list[i].low_mark = info.list[i].low_mark;
1854 retval->list[i].high_mark = info.list[i].high_mark;
1863 * Map all DMA buffers into client-virtual space.
1865 * \param fd file descriptor.
1867 * \return a pointer to a ::drmBufMap structure.
1869 * \note The client may not use these buffers until obtaining buffer indices
1873 * This function calls the DRM_IOCTL_MAP_BUFS ioctl and copies the returned
1874 * information about the buffers in a drm_buf_map structure into the
1875 * client-visible data structures.
1877 drm_public drmBufMapPtr drmMapBufs(int fd)
1880 drmBufMapPtr retval;
1884 if (drmIoctl(fd, DRM_IOCTL_MAP_BUFS, &bufs))
1890 if (!(bufs.list = drmMalloc(bufs.count * sizeof(*bufs.list))))
1893 if (drmIoctl(fd, DRM_IOCTL_MAP_BUFS, &bufs)) {
1898 retval = drmMalloc(sizeof(*retval));
1899 retval->count = bufs.count;
1900 retval->list = drmMalloc(bufs.count * sizeof(*retval->list));
1901 for (i = 0; i < bufs.count; i++) {
1902 retval->list[i].idx = bufs.list[i].idx;
1903 retval->list[i].total = bufs.list[i].total;
1904 retval->list[i].used = 0;
1905 retval->list[i].address = bufs.list[i].address;
1914 * Unmap buffers allocated with drmMapBufs().
1916 * \return zero on success, or negative value on failure.
1919 * Calls munmap() for every buffer stored in \p bufs and frees the
1920 * memory allocated by drmMapBufs().
1922 drm_public int drmUnmapBufs(drmBufMapPtr bufs)
1926 for (i = 0; i < bufs->count; i++) {
1927 drm_munmap(bufs->list[i].address, bufs->list[i].total);
1930 drmFree(bufs->list);
1936 #define DRM_DMA_RETRY 16
1939 * Reserve DMA buffers.
1941 * \param fd file descriptor.
1944 * \return zero on success, or a negative value on failure.
1947 * Assemble the arguments into a drm_dma structure and keeps issuing the
1948 * DRM_IOCTL_DMA ioctl until success or until maximum number of retries.
1950 drm_public int drmDMA(int fd, drmDMAReqPtr request)
1955 dma.context = request->context;
1956 dma.send_count = request->send_count;
1957 dma.send_indices = request->send_list;
1958 dma.send_sizes = request->send_sizes;
1959 dma.flags = (enum drm_dma_flags)request->flags;
1960 dma.request_count = request->request_count;
1961 dma.request_size = request->request_size;
1962 dma.request_indices = request->request_list;
1963 dma.request_sizes = request->request_sizes;
1964 dma.granted_count = 0;
1967 ret = ioctl( fd, DRM_IOCTL_DMA, &dma );
1968 } while ( ret && errno == EAGAIN && i++ < DRM_DMA_RETRY );
1971 request->granted_count = dma.granted_count;
1980 * Obtain heavyweight hardware lock.
1982 * \param fd file descriptor.
1983 * \param context context.
1984 * \param flags flags that determine the state of the hardware when the function
1987 * \return always zero.
1990 * This function translates the arguments into a drm_lock structure and issue
1991 * the DRM_IOCTL_LOCK ioctl until the lock is successfully acquired.
1993 drm_public int drmGetLock(int fd, drm_context_t context, drmLockFlags flags)
1998 lock.context = context;
2000 if (flags & DRM_LOCK_READY) lock.flags |= _DRM_LOCK_READY;
2001 if (flags & DRM_LOCK_QUIESCENT) lock.flags |= _DRM_LOCK_QUIESCENT;
2002 if (flags & DRM_LOCK_FLUSH) lock.flags |= _DRM_LOCK_FLUSH;
2003 if (flags & DRM_LOCK_FLUSH_ALL) lock.flags |= _DRM_LOCK_FLUSH_ALL;
2004 if (flags & DRM_HALT_ALL_QUEUES) lock.flags |= _DRM_HALT_ALL_QUEUES;
2005 if (flags & DRM_HALT_CUR_QUEUES) lock.flags |= _DRM_HALT_CUR_QUEUES;
2007 while (drmIoctl(fd, DRM_IOCTL_LOCK, &lock))
2013 * Release the hardware lock.
2015 * \param fd file descriptor.
2016 * \param context context.
2018 * \return zero on success, or a negative value on failure.
2021 * This function is a wrapper around the DRM_IOCTL_UNLOCK ioctl, passing the
2022 * argument in a drm_lock structure.
2024 drm_public int drmUnlock(int fd, drm_context_t context)
2029 lock.context = context;
2030 return drmIoctl(fd, DRM_IOCTL_UNLOCK, &lock);
2033 drm_public drm_context_t *drmGetReservedContextList(int fd, int *count)
2037 drm_context_t * retval;
2041 if (drmIoctl(fd, DRM_IOCTL_RES_CTX, &res))
2047 if (!(list = drmMalloc(res.count * sizeof(*list))))
2049 if (!(retval = drmMalloc(res.count * sizeof(*retval))))
2052 res.contexts = list;
2053 if (drmIoctl(fd, DRM_IOCTL_RES_CTX, &res))
2054 goto err_free_context;
2056 for (i = 0; i < res.count; i++)
2057 retval[i] = list[i].handle;
2070 drm_public void drmFreeReservedContextList(drm_context_t *pt)
2078 * Used by the X server during GLXContext initialization. This causes
2079 * per-context kernel-level resources to be allocated.
2081 * \param fd file descriptor.
2082 * \param handle is set on success. To be used by the client when requesting DMA
2083 * dispatch with drmDMA().
2085 * \return zero on success, or a negative value on failure.
2087 * \note May only be called by root.
2090 * This function is a wrapper around the DRM_IOCTL_ADD_CTX ioctl, passing the
2091 * argument in a drm_ctx structure.
2093 drm_public int drmCreateContext(int fd, drm_context_t *handle)
2098 if (drmIoctl(fd, DRM_IOCTL_ADD_CTX, &ctx))
2100 *handle = ctx.handle;
2104 drm_public int drmSwitchToContext(int fd, drm_context_t context)
2109 ctx.handle = context;
2110 if (drmIoctl(fd, DRM_IOCTL_SWITCH_CTX, &ctx))
2115 drm_public int drmSetContextFlags(int fd, drm_context_t context,
2116 drm_context_tFlags flags)
2121 * Context preserving means that no context switches are done between DMA
2122 * buffers from one context and the next. This is suitable for use in the
2123 * X server (which promises to maintain hardware context), or in the
2124 * client-side library when buffers are swapped on behalf of two threads.
2127 ctx.handle = context;
2128 if (flags & DRM_CONTEXT_PRESERVED)
2129 ctx.flags |= _DRM_CONTEXT_PRESERVED;
2130 if (flags & DRM_CONTEXT_2DONLY)
2131 ctx.flags |= _DRM_CONTEXT_2DONLY;
2132 if (drmIoctl(fd, DRM_IOCTL_MOD_CTX, &ctx))
2137 drm_public int drmGetContextFlags(int fd, drm_context_t context,
2138 drm_context_tFlagsPtr flags)
2143 ctx.handle = context;
2144 if (drmIoctl(fd, DRM_IOCTL_GET_CTX, &ctx))
2147 if (ctx.flags & _DRM_CONTEXT_PRESERVED)
2148 *flags |= DRM_CONTEXT_PRESERVED;
2149 if (ctx.flags & _DRM_CONTEXT_2DONLY)
2150 *flags |= DRM_CONTEXT_2DONLY;
2157 * Free any kernel-level resources allocated with drmCreateContext() associated
2160 * \param fd file descriptor.
2161 * \param handle handle given by drmCreateContext().
2163 * \return zero on success, or a negative value on failure.
2165 * \note May only be called by root.
2168 * This function is a wrapper around the DRM_IOCTL_RM_CTX ioctl, passing the
2169 * argument in a drm_ctx structure.
2171 drm_public int drmDestroyContext(int fd, drm_context_t handle)
2176 ctx.handle = handle;
2177 if (drmIoctl(fd, DRM_IOCTL_RM_CTX, &ctx))
2182 drm_public int drmCreateDrawable(int fd, drm_drawable_t *handle)
2187 if (drmIoctl(fd, DRM_IOCTL_ADD_DRAW, &draw))
2189 *handle = draw.handle;
2193 drm_public int drmDestroyDrawable(int fd, drm_drawable_t handle)
2198 draw.handle = handle;
2199 if (drmIoctl(fd, DRM_IOCTL_RM_DRAW, &draw))
2204 drm_public int drmUpdateDrawableInfo(int fd, drm_drawable_t handle,
2205 drm_drawable_info_type_t type,
2206 unsigned int num, void *data)
2208 drm_update_draw_t update;
2211 update.handle = handle;
2214 update.data = (unsigned long long)(unsigned long)data;
2216 if (drmIoctl(fd, DRM_IOCTL_UPDATE_DRAW, &update))
2222 drm_public int drmCrtcGetSequence(int fd, uint32_t crtcId, uint64_t *sequence,
2225 struct drm_crtc_get_sequence get_seq;
2229 get_seq.crtc_id = crtcId;
2230 ret = drmIoctl(fd, DRM_IOCTL_CRTC_GET_SEQUENCE, &get_seq);
2235 *sequence = get_seq.sequence;
2237 *ns = get_seq.sequence_ns;
2241 drm_public int drmCrtcQueueSequence(int fd, uint32_t crtcId, uint32_t flags,
2243 uint64_t *sequence_queued,
2246 struct drm_crtc_queue_sequence queue_seq;
2249 memclear(queue_seq);
2250 queue_seq.crtc_id = crtcId;
2251 queue_seq.flags = flags;
2252 queue_seq.sequence = sequence;
2253 queue_seq.user_data = user_data;
2255 ret = drmIoctl(fd, DRM_IOCTL_CRTC_QUEUE_SEQUENCE, &queue_seq);
2256 if (ret == 0 && sequence_queued)
2257 *sequence_queued = queue_seq.sequence;
2263 * Acquire the AGP device.
2265 * Must be called before any of the other AGP related calls.
2267 * \param fd file descriptor.
2269 * \return zero on success, or a negative value on failure.
2272 * This function is a wrapper around the DRM_IOCTL_AGP_ACQUIRE ioctl.
2274 drm_public int drmAgpAcquire(int fd)
2276 if (drmIoctl(fd, DRM_IOCTL_AGP_ACQUIRE, NULL))
2283 * Release the AGP device.
2285 * \param fd file descriptor.
2287 * \return zero on success, or a negative value on failure.
2290 * This function is a wrapper around the DRM_IOCTL_AGP_RELEASE ioctl.
2292 drm_public int drmAgpRelease(int fd)
2294 if (drmIoctl(fd, DRM_IOCTL_AGP_RELEASE, NULL))
2303 * \param fd file descriptor.
2304 * \param mode AGP mode.
2306 * \return zero on success, or a negative value on failure.
2309 * This function is a wrapper around the DRM_IOCTL_AGP_ENABLE ioctl, passing the
2310 * argument in a drm_agp_mode structure.
2312 drm_public int drmAgpEnable(int fd, unsigned long mode)
2318 if (drmIoctl(fd, DRM_IOCTL_AGP_ENABLE, &m))
2325 * Allocate a chunk of AGP memory.
2327 * \param fd file descriptor.
2328 * \param size requested memory size in bytes. Will be rounded to page boundary.
2329 * \param type type of memory to allocate.
2330 * \param address if not zero, will be set to the physical address of the
2332 * \param handle on success will be set to a handle of the allocated memory.
2334 * \return zero on success, or a negative value on failure.
2337 * This function is a wrapper around the DRM_IOCTL_AGP_ALLOC ioctl, passing the
2338 * arguments in a drm_agp_buffer structure.
2340 drm_public int drmAgpAlloc(int fd, unsigned long size, unsigned long type,
2341 unsigned long *address, drm_handle_t *handle)
2346 *handle = DRM_AGP_NO_HANDLE;
2349 if (drmIoctl(fd, DRM_IOCTL_AGP_ALLOC, &b))
2352 *address = b.physical;
2359 * Free a chunk of AGP memory.
2361 * \param fd file descriptor.
2362 * \param handle handle to the allocated memory, as given by drmAgpAllocate().
2364 * \return zero on success, or a negative value on failure.
2367 * This function is a wrapper around the DRM_IOCTL_AGP_FREE ioctl, passing the
2368 * argument in a drm_agp_buffer structure.
2370 drm_public int drmAgpFree(int fd, drm_handle_t handle)
2376 if (drmIoctl(fd, DRM_IOCTL_AGP_FREE, &b))
2383 * Bind a chunk of AGP memory.
2385 * \param fd file descriptor.
2386 * \param handle handle to the allocated memory, as given by drmAgpAllocate().
2387 * \param offset offset in bytes. It will round to page boundary.
2389 * \return zero on success, or a negative value on failure.
2392 * This function is a wrapper around the DRM_IOCTL_AGP_BIND ioctl, passing the
2393 * argument in a drm_agp_binding structure.
2395 drm_public int drmAgpBind(int fd, drm_handle_t handle, unsigned long offset)
2397 drm_agp_binding_t b;
2402 if (drmIoctl(fd, DRM_IOCTL_AGP_BIND, &b))
2409 * Unbind a chunk of AGP memory.
2411 * \param fd file descriptor.
2412 * \param handle handle to the allocated memory, as given by drmAgpAllocate().
2414 * \return zero on success, or a negative value on failure.
2417 * This function is a wrapper around the DRM_IOCTL_AGP_UNBIND ioctl, passing
2418 * the argument in a drm_agp_binding structure.
2420 drm_public int drmAgpUnbind(int fd, drm_handle_t handle)
2422 drm_agp_binding_t b;
2426 if (drmIoctl(fd, DRM_IOCTL_AGP_UNBIND, &b))
2433 * Get AGP driver major version number.
2435 * \param fd file descriptor.
2437 * \return major version number on success, or a negative value on failure..
2440 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2441 * necessary information in a drm_agp_info structure.
2443 drm_public int drmAgpVersionMajor(int fd)
2449 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2451 return i.agp_version_major;
2456 * Get AGP driver minor version number.
2458 * \param fd file descriptor.
2460 * \return minor version number on success, or a negative value on failure.
2463 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2464 * necessary information in a drm_agp_info structure.
2466 drm_public int drmAgpVersionMinor(int fd)
2472 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2474 return i.agp_version_minor;
2481 * \param fd file descriptor.
2483 * \return mode on success, or zero on failure.
2486 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2487 * necessary information in a drm_agp_info structure.
2489 drm_public unsigned long drmAgpGetMode(int fd)
2495 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2502 * Get AGP aperture base.
2504 * \param fd file descriptor.
2506 * \return aperture base on success, zero on failure.
2509 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2510 * necessary information in a drm_agp_info structure.
2512 drm_public unsigned long drmAgpBase(int fd)
2518 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2520 return i.aperture_base;
2525 * Get AGP aperture size.
2527 * \param fd file descriptor.
2529 * \return aperture size on success, zero on failure.
2532 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2533 * necessary information in a drm_agp_info structure.
2535 drm_public unsigned long drmAgpSize(int fd)
2541 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2543 return i.aperture_size;
2548 * Get used AGP memory.
2550 * \param fd file descriptor.
2552 * \return memory used on success, or zero on failure.
2555 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2556 * necessary information in a drm_agp_info structure.
2558 drm_public unsigned long drmAgpMemoryUsed(int fd)
2564 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2566 return i.memory_used;
2571 * Get available AGP memory.
2573 * \param fd file descriptor.
2575 * \return memory available on success, or zero on failure.
2578 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2579 * necessary information in a drm_agp_info structure.
2581 drm_public unsigned long drmAgpMemoryAvail(int fd)
2587 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2589 return i.memory_allowed;
2594 * Get hardware vendor ID.
2596 * \param fd file descriptor.
2598 * \return vendor ID on success, or zero on failure.
2601 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2602 * necessary information in a drm_agp_info structure.
2604 drm_public unsigned int drmAgpVendorId(int fd)
2610 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2617 * Get hardware device ID.
2619 * \param fd file descriptor.
2621 * \return zero on success, or zero on failure.
2624 * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the
2625 * necessary information in a drm_agp_info structure.
2627 drm_public unsigned int drmAgpDeviceId(int fd)
2633 if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i))
2638 drm_public int drmScatterGatherAlloc(int fd, unsigned long size,
2639 drm_handle_t *handle)
2641 drm_scatter_gather_t sg;
2647 if (drmIoctl(fd, DRM_IOCTL_SG_ALLOC, &sg))
2649 *handle = sg.handle;
2653 drm_public int drmScatterGatherFree(int fd, drm_handle_t handle)
2655 drm_scatter_gather_t sg;
2659 if (drmIoctl(fd, DRM_IOCTL_SG_FREE, &sg))
2667 * \param fd file descriptor.
2668 * \param vbl pointer to a drmVBlank structure.
2670 * \return zero on success, or a negative value on failure.
2673 * This function is a wrapper around the DRM_IOCTL_WAIT_VBLANK ioctl.
2675 drm_public int drmWaitVBlank(int fd, drmVBlankPtr vbl)
2677 struct timespec timeout, cur;
2680 ret = clock_gettime(CLOCK_MONOTONIC, &timeout);
2682 fprintf(stderr, "clock_gettime failed: %s\n", strerror(errno));
2688 ret = ioctl(fd, DRM_IOCTL_WAIT_VBLANK, vbl);
2689 vbl->request.type &= ~DRM_VBLANK_RELATIVE;
2690 if (ret && errno == EINTR) {
2691 clock_gettime(CLOCK_MONOTONIC, &cur);
2692 /* Timeout after 1s */
2693 if (cur.tv_sec > timeout.tv_sec + 1 ||
2694 (cur.tv_sec == timeout.tv_sec && cur.tv_nsec >=
2701 } while (ret && errno == EINTR);
2707 drm_public int drmError(int err, const char *label)
2710 case DRM_ERR_NO_DEVICE:
2711 fprintf(stderr, "%s: no device\n", label);
2713 case DRM_ERR_NO_ACCESS:
2714 fprintf(stderr, "%s: no access\n", label);
2716 case DRM_ERR_NOT_ROOT:
2717 fprintf(stderr, "%s: not root\n", label);
2719 case DRM_ERR_INVALID:
2720 fprintf(stderr, "%s: invalid args\n", label);
2725 fprintf( stderr, "%s: error %d (%s)\n", label, err, strerror(err) );
2733 * Install IRQ handler.
2735 * \param fd file descriptor.
2736 * \param irq IRQ number.
2738 * \return zero on success, or a negative value on failure.
2741 * This function is a wrapper around the DRM_IOCTL_CONTROL ioctl, passing the
2742 * argument in a drm_control structure.
2744 drm_public int drmCtlInstHandler(int fd, int irq)
2749 ctl.func = DRM_INST_HANDLER;
2751 if (drmIoctl(fd, DRM_IOCTL_CONTROL, &ctl))
2758 * Uninstall IRQ handler.
2760 * \param fd file descriptor.
2762 * \return zero on success, or a negative value on failure.
2765 * This function is a wrapper around the DRM_IOCTL_CONTROL ioctl, passing the
2766 * argument in a drm_control structure.
2768 drm_public int drmCtlUninstHandler(int fd)
2773 ctl.func = DRM_UNINST_HANDLER;
2775 if (drmIoctl(fd, DRM_IOCTL_CONTROL, &ctl))
2780 drm_public int drmFinish(int fd, int context, drmLockFlags flags)
2785 lock.context = context;
2786 if (flags & DRM_LOCK_READY) lock.flags |= _DRM_LOCK_READY;
2787 if (flags & DRM_LOCK_QUIESCENT) lock.flags |= _DRM_LOCK_QUIESCENT;
2788 if (flags & DRM_LOCK_FLUSH) lock.flags |= _DRM_LOCK_FLUSH;
2789 if (flags & DRM_LOCK_FLUSH_ALL) lock.flags |= _DRM_LOCK_FLUSH_ALL;
2790 if (flags & DRM_HALT_ALL_QUEUES) lock.flags |= _DRM_HALT_ALL_QUEUES;
2791 if (flags & DRM_HALT_CUR_QUEUES) lock.flags |= _DRM_HALT_CUR_QUEUES;
2792 if (drmIoctl(fd, DRM_IOCTL_FINISH, &lock))
2798 * Get IRQ from bus ID.
2800 * \param fd file descriptor.
2801 * \param busnum bus number.
2802 * \param devnum device number.
2803 * \param funcnum function number.
2805 * \return IRQ number on success, or a negative value on failure.
2808 * This function is a wrapper around the DRM_IOCTL_IRQ_BUSID ioctl, passing the
2809 * arguments in a drm_irq_busid structure.
2811 drm_public int drmGetInterruptFromBusID(int fd, int busnum, int devnum,
2819 p.funcnum = funcnum;
2820 if (drmIoctl(fd, DRM_IOCTL_IRQ_BUSID, &p))
2825 drm_public int drmAddContextTag(int fd, drm_context_t context, void *tag)
2827 drmHashEntry *entry = drmGetEntry(fd);
2829 if (drmHashInsert(entry->tagTable, context, tag)) {
2830 drmHashDelete(entry->tagTable, context);
2831 drmHashInsert(entry->tagTable, context, tag);
2836 drm_public int drmDelContextTag(int fd, drm_context_t context)
2838 drmHashEntry *entry = drmGetEntry(fd);
2840 return drmHashDelete(entry->tagTable, context);
2843 drm_public void *drmGetContextTag(int fd, drm_context_t context)
2845 drmHashEntry *entry = drmGetEntry(fd);
2848 if (drmHashLookup(entry->tagTable, context, &value))
2854 drm_public int drmAddContextPrivateMapping(int fd, drm_context_t ctx_id,
2855 drm_handle_t handle)
2857 drm_ctx_priv_map_t map;
2860 map.ctx_id = ctx_id;
2861 map.handle = (void *)(uintptr_t)handle;
2863 if (drmIoctl(fd, DRM_IOCTL_SET_SAREA_CTX, &map))
2868 drm_public int drmGetContextPrivateMapping(int fd, drm_context_t ctx_id,
2869 drm_handle_t *handle)
2871 drm_ctx_priv_map_t map;
2874 map.ctx_id = ctx_id;
2876 if (drmIoctl(fd, DRM_IOCTL_GET_SAREA_CTX, &map))
2879 *handle = (drm_handle_t)(uintptr_t)map.handle;
2884 drm_public int drmGetMap(int fd, int idx, drm_handle_t *offset, drmSize *size,
2885 drmMapType *type, drmMapFlags *flags,
2886 drm_handle_t *handle, int *mtrr)
2892 if (drmIoctl(fd, DRM_IOCTL_GET_MAP, &map))
2894 *offset = map.offset;
2896 *type = (drmMapType)map.type;
2897 *flags = (drmMapFlags)map.flags;
2898 *handle = (unsigned long)map.handle;
2903 drm_public int drmGetClient(int fd, int idx, int *auth, int *pid, int *uid,
2904 unsigned long *magic, unsigned long *iocs)
2906 drm_client_t client;
2910 if (drmIoctl(fd, DRM_IOCTL_GET_CLIENT, &client))
2912 *auth = client.auth;
2915 *magic = client.magic;
2916 *iocs = client.iocs;
2920 drm_public int drmGetStats(int fd, drmStatsT *stats)
2926 if (drmIoctl(fd, DRM_IOCTL_GET_STATS, &s))
2930 memset(stats, 0, sizeof(*stats));
2931 if (s.count > sizeof(stats->data)/sizeof(stats->data[0]))
2935 stats->data[i].long_format = "%-20.20s"; \
2936 stats->data[i].rate_format = "%8.8s"; \
2937 stats->data[i].isvalue = 1; \
2938 stats->data[i].verbose = 0
2941 stats->data[i].long_format = "%-20.20s"; \
2942 stats->data[i].rate_format = "%5.5s"; \
2943 stats->data[i].isvalue = 0; \
2944 stats->data[i].mult_names = "kgm"; \
2945 stats->data[i].mult = 1000; \
2946 stats->data[i].verbose = 0
2949 stats->data[i].long_format = "%-20.20s"; \
2950 stats->data[i].rate_format = "%5.5s"; \
2951 stats->data[i].isvalue = 0; \
2952 stats->data[i].mult_names = "KGM"; \
2953 stats->data[i].mult = 1024; \
2954 stats->data[i].verbose = 0
2957 stats->count = s.count;
2958 for (i = 0; i < s.count; i++) {
2959 stats->data[i].value = s.data[i].value;
2960 switch (s.data[i].type) {
2961 case _DRM_STAT_LOCK:
2962 stats->data[i].long_name = "Lock";
2963 stats->data[i].rate_name = "Lock";
2966 case _DRM_STAT_OPENS:
2967 stats->data[i].long_name = "Opens";
2968 stats->data[i].rate_name = "O";
2970 stats->data[i].verbose = 1;
2972 case _DRM_STAT_CLOSES:
2973 stats->data[i].long_name = "Closes";
2974 stats->data[i].rate_name = "Lock";
2976 stats->data[i].verbose = 1;
2978 case _DRM_STAT_IOCTLS:
2979 stats->data[i].long_name = "Ioctls";
2980 stats->data[i].rate_name = "Ioc/s";
2983 case _DRM_STAT_LOCKS:
2984 stats->data[i].long_name = "Locks";
2985 stats->data[i].rate_name = "Lck/s";
2988 case _DRM_STAT_UNLOCKS:
2989 stats->data[i].long_name = "Unlocks";
2990 stats->data[i].rate_name = "Unl/s";
2994 stats->data[i].long_name = "IRQs";
2995 stats->data[i].rate_name = "IRQ/s";
2998 case _DRM_STAT_PRIMARY:
2999 stats->data[i].long_name = "Primary Bytes";
3000 stats->data[i].rate_name = "PB/s";
3003 case _DRM_STAT_SECONDARY:
3004 stats->data[i].long_name = "Secondary Bytes";
3005 stats->data[i].rate_name = "SB/s";
3009 stats->data[i].long_name = "DMA";
3010 stats->data[i].rate_name = "DMA/s";
3013 case _DRM_STAT_SPECIAL:
3014 stats->data[i].long_name = "Special DMA";
3015 stats->data[i].rate_name = "dma/s";
3018 case _DRM_STAT_MISSED:
3019 stats->data[i].long_name = "Miss";
3020 stats->data[i].rate_name = "Ms/s";
3023 case _DRM_STAT_VALUE:
3024 stats->data[i].long_name = "Value";
3025 stats->data[i].rate_name = "Value";
3028 case _DRM_STAT_BYTE:
3029 stats->data[i].long_name = "Bytes";
3030 stats->data[i].rate_name = "B/s";
3033 case _DRM_STAT_COUNT:
3035 stats->data[i].long_name = "Count";
3036 stats->data[i].rate_name = "Cnt/s";
3045 * Issue a set-version ioctl.
3047 * \param fd file descriptor.
3048 * \param drmCommandIndex command index
3049 * \param data source pointer of the data to be read and written.
3050 * \param size size of the data to be read and written.
3052 * \return zero on success, or a negative value on failure.
3055 * It issues a read-write ioctl given by
3056 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
3058 drm_public int drmSetInterfaceVersion(int fd, drmSetVersion *version)
3061 drm_set_version_t sv;
3064 sv.drm_di_major = version->drm_di_major;
3065 sv.drm_di_minor = version->drm_di_minor;
3066 sv.drm_dd_major = version->drm_dd_major;
3067 sv.drm_dd_minor = version->drm_dd_minor;
3069 if (drmIoctl(fd, DRM_IOCTL_SET_VERSION, &sv)) {
3073 version->drm_di_major = sv.drm_di_major;
3074 version->drm_di_minor = sv.drm_di_minor;
3075 version->drm_dd_major = sv.drm_dd_major;
3076 version->drm_dd_minor = sv.drm_dd_minor;
3082 * Send a device-specific command.
3084 * \param fd file descriptor.
3085 * \param drmCommandIndex command index
3087 * \return zero on success, or a negative value on failure.
3090 * It issues a ioctl given by
3091 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
3093 drm_public int drmCommandNone(int fd, unsigned long drmCommandIndex)
3095 unsigned long request;
3097 request = DRM_IO( DRM_COMMAND_BASE + drmCommandIndex);
3099 if (drmIoctl(fd, request, NULL)) {
3107 * Send a device-specific read command.
3109 * \param fd file descriptor.
3110 * \param drmCommandIndex command index
3111 * \param data destination pointer of the data to be read.
3112 * \param size size of the data to be read.
3114 * \return zero on success, or a negative value on failure.
3117 * It issues a read ioctl given by
3118 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
3120 drm_public int drmCommandRead(int fd, unsigned long drmCommandIndex,
3121 void *data, unsigned long size)
3123 unsigned long request;
3125 request = DRM_IOC( DRM_IOC_READ, DRM_IOCTL_BASE,
3126 DRM_COMMAND_BASE + drmCommandIndex, size);
3128 if (drmIoctl(fd, request, data)) {
3136 * Send a device-specific write command.
3138 * \param fd file descriptor.
3139 * \param drmCommandIndex command index
3140 * \param data source pointer of the data to be written.
3141 * \param size size of the data to be written.
3143 * \return zero on success, or a negative value on failure.
3146 * It issues a write ioctl given by
3147 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
3149 drm_public int drmCommandWrite(int fd, unsigned long drmCommandIndex,
3150 void *data, unsigned long size)
3152 unsigned long request;
3154 request = DRM_IOC( DRM_IOC_WRITE, DRM_IOCTL_BASE,
3155 DRM_COMMAND_BASE + drmCommandIndex, size);
3157 if (drmIoctl(fd, request, data)) {
3165 * Send a device-specific read-write command.
3167 * \param fd file descriptor.
3168 * \param drmCommandIndex command index
3169 * \param data source pointer of the data to be read and written.
3170 * \param size size of the data to be read and written.
3172 * \return zero on success, or a negative value on failure.
3175 * It issues a read-write ioctl given by
3176 * \code DRM_COMMAND_BASE + drmCommandIndex \endcode.
3178 drm_public int drmCommandWriteRead(int fd, unsigned long drmCommandIndex,
3179 void *data, unsigned long size)
3181 unsigned long request;
3183 request = DRM_IOC( DRM_IOC_READ|DRM_IOC_WRITE, DRM_IOCTL_BASE,
3184 DRM_COMMAND_BASE + drmCommandIndex, size);
3186 if (drmIoctl(fd, request, data))
3191 #define DRM_MAX_FDS 16
3197 } connection[DRM_MAX_FDS];
3199 static int nr_fds = 0;
3201 drm_public int drmOpenOnce(void *unused, const char *BusID, int *newlyopened)
3203 return drmOpenOnceWithType(BusID, newlyopened, DRM_NODE_PRIMARY);
3206 drm_public int drmOpenOnceWithType(const char *BusID, int *newlyopened,
3212 for (i = 0; i < nr_fds; i++)
3213 if ((strcmp(BusID, connection[i].BusID) == 0) &&
3214 (connection[i].type == type)) {
3215 connection[i].refcount++;
3217 return connection[i].fd;
3220 fd = drmOpenWithType(NULL, BusID, type);
3221 if (fd < 0 || nr_fds == DRM_MAX_FDS)
3224 connection[nr_fds].BusID = strdup(BusID);
3225 connection[nr_fds].fd = fd;
3226 connection[nr_fds].refcount = 1;
3227 connection[nr_fds].type = type;
3231 fprintf(stderr, "saved connection %d for %s %d\n",
3232 nr_fds, connection[nr_fds].BusID,
3233 strcmp(BusID, connection[nr_fds].BusID));
3240 drm_public void drmCloseOnce(int fd)
3244 for (i = 0; i < nr_fds; i++) {
3245 if (fd == connection[i].fd) {
3246 if (--connection[i].refcount == 0) {
3247 drmClose(connection[i].fd);
3248 free(connection[i].BusID);
3251 connection[i] = connection[nr_fds];
3259 drm_public int drmSetMaster(int fd)
3261 return drmIoctl(fd, DRM_IOCTL_SET_MASTER, NULL);
3264 drm_public int drmDropMaster(int fd)
3266 return drmIoctl(fd, DRM_IOCTL_DROP_MASTER, NULL);
3269 drm_public int drmIsMaster(int fd)
3271 /* Detect master by attempting something that requires master.
3273 * Authenticating magic tokens requires master and 0 is an
3274 * internal kernel detail which we could use. Attempting this on
3275 * a master fd would fail therefore fail with EINVAL because 0
3278 * A non-master fd will fail with EACCES, as the kernel checks
3279 * for master before attempting to do anything else.
3281 * Since we don't want to leak implementation details, use
3284 return drmAuthMagic(fd, 0) != -EACCES;
3287 drm_public char *drmGetDeviceNameFromFd(int fd)
3294 if (fstat(fd, &sbuf))
3297 maj = major(sbuf.st_rdev);
3298 min = minor(sbuf.st_rdev);
3299 nodetype = drmGetMinorType(maj, min);
3300 return drmGetMinorNameForFD(fd, nodetype);
3307 /* The whole drmOpen thing is a fiasco and we need to find a way
3308 * back to just using open(2). For now, however, lets just make
3309 * things worse with even more ad hoc directory walking code to
3310 * discover the device file name. */
3315 for (i = 0; i < DRM_MAX_MINOR; i++) {
3316 snprintf(name, sizeof name, DRM_DEV_NAME, DRM_DIR_NAME, i);
3317 if (stat(name, &sbuf) == 0 && sbuf.st_rdev == d)
3320 if (i == DRM_MAX_MINOR)
3323 return strdup(name);
3327 static bool drmNodeIsDRM(int maj, int min)
3333 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device/drm",
3335 return stat(path, &sbuf) == 0;
3336 #elif defined(__FreeBSD__)
3337 char name[SPECNAMELEN];
3339 if (!devname_r(makedev(maj, min), S_IFCHR, name, sizeof(name)))
3341 /* Handle drm/ and dri/ as both are present in different FreeBSD version
3342 * FreeBSD on amd64/i386/powerpc external kernel modules create node in
3343 * in /dev/drm/ and links in /dev/dri while a WIP in kernel driver creates
3344 * only device nodes in /dev/dri/ */
3345 return (!strncmp(name, "drm/", 4) || !strncmp(name, "dri/", 4));
3347 return maj == DRM_MAJOR;
3351 drm_public int drmGetNodeTypeFromFd(int fd)
3356 if (fstat(fd, &sbuf))
3359 maj = major(sbuf.st_rdev);
3360 min = minor(sbuf.st_rdev);
3362 if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode)) {
3367 type = drmGetMinorType(maj, min);
3373 drm_public int drmPrimeHandleToFD(int fd, uint32_t handle, uint32_t flags,
3376 struct drm_prime_handle args;
3381 args.handle = handle;
3383 ret = drmIoctl(fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
3387 *prime_fd = args.fd;
3391 drm_public int drmPrimeFDToHandle(int fd, int prime_fd, uint32_t *handle)
3393 struct drm_prime_handle args;
3398 ret = drmIoctl(fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &args);
3402 *handle = args.handle;
3406 drm_public int drmCloseBufferHandle(int fd, uint32_t handle)
3408 struct drm_gem_close args;
3411 args.handle = handle;
3412 return drmIoctl(fd, DRM_IOCTL_GEM_CLOSE, &args);
3415 static char *drmGetMinorNameForFD(int fd, int type)
3421 const char *name = drmGetMinorName(type);
3423 char dev_name[64], buf[64];
3431 if (fstat(fd, &sbuf))
3434 maj = major(sbuf.st_rdev);
3435 min = minor(sbuf.st_rdev);
3437 if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode))
3440 snprintf(buf, sizeof(buf), "/sys/dev/char/%d:%d/device/drm", maj, min);
3442 sysdir = opendir(buf);
3446 while ((ent = readdir(sysdir))) {
3447 if (strncmp(ent->d_name, name, len) == 0) {
3448 if (snprintf(dev_name, sizeof(dev_name), DRM_DIR_NAME "/%s",
3453 return strdup(dev_name);
3459 #elif defined(__FreeBSD__)
3461 char dname[SPECNAMELEN];
3463 char name[SPECNAMELEN];
3464 int id, maj, min, nodetype, i;
3466 if (fstat(fd, &sbuf))
3469 maj = major(sbuf.st_rdev);
3470 min = minor(sbuf.st_rdev);
3472 if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode))
3475 if (!devname_r(sbuf.st_rdev, S_IFCHR, dname, sizeof(dname)))
3478 /* Handle both /dev/drm and /dev/dri
3479 * FreeBSD on amd64/i386/powerpc external kernel modules create node in
3480 * in /dev/drm/ and links in /dev/dri while a WIP in kernel driver creates
3481 * only device nodes in /dev/dri/ */
3483 /* Get the node type represented by fd so we can deduce the target name */
3484 nodetype = drmGetMinorType(maj, min);
3487 mname = drmGetMinorName(type);
3489 for (i = 0; i < SPECNAMELEN; i++) {
3490 if (isalpha(dname[i]) == 0 && dname[i] != '/')
3493 if (dname[i] == '\0')
3496 id = (int)strtol(&dname[i], NULL, 10);
3497 id -= drmGetMinorBase(nodetype);
3498 snprintf(name, sizeof(name), DRM_DIR_NAME "/%s%d", mname,
3499 id + drmGetMinorBase(type));
3501 return strdup(name);
3504 char buf[PATH_MAX + 1];
3505 const char *dev_name = drmGetDeviceName(type);
3506 unsigned int maj, min;
3509 if (fstat(fd, &sbuf))
3512 maj = major(sbuf.st_rdev);
3513 min = minor(sbuf.st_rdev);
3515 if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode))
3521 n = snprintf(buf, sizeof(buf), dev_name, DRM_DIR_NAME, min);
3522 if (n == -1 || n >= sizeof(buf))
3529 drm_public char *drmGetPrimaryDeviceNameFromFd(int fd)
3531 return drmGetMinorNameForFD(fd, DRM_NODE_PRIMARY);
3534 drm_public char *drmGetRenderDeviceNameFromFd(int fd)
3536 return drmGetMinorNameForFD(fd, DRM_NODE_RENDER);
3540 static char * DRM_PRINTFLIKE(2, 3)
3541 sysfs_uevent_get(const char *path, const char *fmt, ...)
3543 char filename[PATH_MAX + 1], *key, *line = NULL, *value = NULL;
3544 size_t size = 0, len;
3550 num = vasprintf(&key, fmt, ap);
3554 snprintf(filename, sizeof(filename), "%s/uevent", path);
3556 fp = fopen(filename, "r");
3562 while ((num = getline(&line, &size, fp)) >= 0) {
3563 if ((strncmp(line, key, len) == 0) && (line[len] == '=')) {
3564 char *start = line + len + 1, *end = line + num - 1;
3569 value = strndup(start, end - start);
3583 /* Little white lie to avoid major rework of the existing code */
3584 #define DRM_BUS_VIRTIO 0x10
3587 static int get_subsystem_type(const char *device_path)
3589 char path[PATH_MAX + 1] = "";
3590 char link[PATH_MAX + 1] = "";
3596 { "/pci", DRM_BUS_PCI },
3597 { "/usb", DRM_BUS_USB },
3598 { "/platform", DRM_BUS_PLATFORM },
3599 { "/spi", DRM_BUS_PLATFORM },
3600 { "/host1x", DRM_BUS_HOST1X },
3601 { "/virtio", DRM_BUS_VIRTIO },
3604 strncpy(path, device_path, PATH_MAX);
3605 strncat(path, "/subsystem", PATH_MAX);
3607 if (readlink(path, link, PATH_MAX) < 0)
3610 name = strrchr(link, '/');
3614 for (unsigned i = 0; i < ARRAY_SIZE(bus_types); i++) {
3615 if (strncmp(name, bus_types[i].name, strlen(bus_types[i].name)) == 0)
3616 return bus_types[i].bus_type;
3623 static int drmParseSubsystemType(int maj, int min)
3626 char path[PATH_MAX + 1] = "";
3627 char real_path[PATH_MAX + 1] = "";
3630 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
3632 subsystem_type = get_subsystem_type(path);
3633 /* Try to get the parent (underlying) device type */
3634 if (subsystem_type == DRM_BUS_VIRTIO) {
3635 /* Assume virtio-pci on error */
3636 if (!realpath(path, real_path))
3637 return DRM_BUS_VIRTIO;
3638 strncat(path, "/..", PATH_MAX);
3639 subsystem_type = get_subsystem_type(path);
3640 if (subsystem_type < 0)
3641 return DRM_BUS_VIRTIO;
3643 return subsystem_type;
3644 #elif defined(__OpenBSD__) || defined(__DragonFly__) || defined(__FreeBSD__)
3647 #warning "Missing implementation of drmParseSubsystemType"
3654 get_pci_path(int maj, int min, char *pci_path)
3656 char path[PATH_MAX + 1], *term;
3658 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
3659 if (!realpath(path, pci_path)) {
3660 strcpy(pci_path, path);
3664 term = strrchr(pci_path, '/');
3665 if (term && strncmp(term, "/virtio", 7) == 0)
3671 static int get_sysctl_pci_bus_info(int maj, int min, drmPciBusInfoPtr info)
3673 char dname[SPECNAMELEN];
3674 char sysctl_name[16];
3675 char sysctl_val[256];
3677 int id, type, nelem;
3678 unsigned int rdev, majmin, domain, bus, dev, func;
3680 rdev = makedev(maj, min);
3681 if (!devname_r(rdev, S_IFCHR, dname, sizeof(dname)))
3684 if (sscanf(dname, "drm/%d\n", &id) != 1)
3686 type = drmGetMinorType(maj, min);
3690 /* BUG: This above section is iffy, since it mandates that a driver will
3691 * create both card and render node.
3692 * If it does not, the next DRM device will create card#X and
3693 * renderD#(128+X)-1.
3694 * This is a possibility in FreeBSD but for now there is no good way for
3695 * obtaining the info.
3698 case DRM_NODE_PRIMARY:
3700 case DRM_NODE_RENDER:
3707 if (snprintf(sysctl_name, sizeof(sysctl_name), "hw.dri.%d.busid", id) <= 0)
3709 sysctl_len = sizeof(sysctl_val);
3710 if (sysctlbyname(sysctl_name, sysctl_val, &sysctl_len, NULL, 0))
3713 #define bus_fmt "pci:%04x:%02x:%02x.%u"
3715 nelem = sscanf(sysctl_val, bus_fmt, &domain, &bus, &dev, &func);
3718 info->domain = domain;
3727 static int drmParsePciBusInfo(int maj, int min, drmPciBusInfoPtr info)
3730 unsigned int domain, bus, dev, func;
3731 char pci_path[PATH_MAX + 1], *value;
3734 get_pci_path(maj, min, pci_path);
3736 value = sysfs_uevent_get(pci_path, "PCI_SLOT_NAME");
3740 num = sscanf(value, "%04x:%02x:%02x.%1u", &domain, &bus, &dev, &func);
3746 info->domain = domain;
3752 #elif defined(__OpenBSD__) || defined(__DragonFly__)
3753 struct drm_pciinfo pinfo;
3756 type = drmGetMinorType(maj, min);
3760 fd = drmOpenMinor(min, 0, type);
3764 if (drmIoctl(fd, DRM_IOCTL_GET_PCIINFO, &pinfo)) {
3770 info->domain = pinfo.domain;
3771 info->bus = pinfo.bus;
3772 info->dev = pinfo.dev;
3773 info->func = pinfo.func;
3776 #elif defined(__FreeBSD__)
3777 return get_sysctl_pci_bus_info(maj, min, info);
3779 #warning "Missing implementation of drmParsePciBusInfo"
3784 drm_public int drmDevicesEqual(drmDevicePtr a, drmDevicePtr b)
3786 if (a == NULL || b == NULL)
3789 if (a->bustype != b->bustype)
3792 switch (a->bustype) {
3794 return memcmp(a->businfo.pci, b->businfo.pci, sizeof(drmPciBusInfo)) == 0;
3797 return memcmp(a->businfo.usb, b->businfo.usb, sizeof(drmUsbBusInfo)) == 0;
3799 case DRM_BUS_PLATFORM:
3800 return memcmp(a->businfo.platform, b->businfo.platform, sizeof(drmPlatformBusInfo)) == 0;
3802 case DRM_BUS_HOST1X:
3803 return memcmp(a->businfo.host1x, b->businfo.host1x, sizeof(drmHost1xBusInfo)) == 0;
3812 static int drmGetNodeType(const char *name)
3814 if (strncmp(name, DRM_RENDER_MINOR_NAME,
3815 sizeof(DRM_RENDER_MINOR_NAME) - 1) == 0)
3816 return DRM_NODE_RENDER;
3818 if (strncmp(name, DRM_PRIMARY_MINOR_NAME,
3819 sizeof(DRM_PRIMARY_MINOR_NAME) - 1) == 0)
3820 return DRM_NODE_PRIMARY;
3825 static int drmGetMaxNodeName(void)
3827 return sizeof(DRM_DIR_NAME) +
3828 MAX3(sizeof(DRM_PRIMARY_MINOR_NAME),
3829 sizeof(DRM_CONTROL_MINOR_NAME),
3830 sizeof(DRM_RENDER_MINOR_NAME)) +
3831 3 /* length of the node number */;
3835 static int parse_separate_sysfs_files(int maj, int min,
3836 drmPciDeviceInfoPtr device,
3837 bool ignore_revision)
3839 static const char *attrs[] = {
3840 "revision", /* Older kernels are missing the file, so check for it first */
3846 char path[PATH_MAX + 1], pci_path[PATH_MAX + 1];
3847 unsigned int data[ARRAY_SIZE(attrs)];
3851 get_pci_path(maj, min, pci_path);
3853 for (unsigned i = ignore_revision ? 1 : 0; i < ARRAY_SIZE(attrs); i++) {
3854 if (snprintf(path, PATH_MAX, "%s/%s", pci_path, attrs[i]) < 0)
3857 fp = fopen(path, "r");
3861 ret = fscanf(fp, "%x", &data[i]);
3868 device->revision_id = ignore_revision ? 0xff : data[0] & 0xff;
3869 device->vendor_id = data[1] & 0xffff;
3870 device->device_id = data[2] & 0xffff;
3871 device->subvendor_id = data[3] & 0xffff;
3872 device->subdevice_id = data[4] & 0xffff;
3877 static int parse_config_sysfs_file(int maj, int min,
3878 drmPciDeviceInfoPtr device)
3880 char path[PATH_MAX + 1], pci_path[PATH_MAX + 1];
3881 unsigned char config[64];
3884 get_pci_path(maj, min, pci_path);
3886 if (snprintf(path, PATH_MAX, "%s/config", pci_path) < 0)
3889 fd = open(path, O_RDONLY);
3893 ret = read(fd, config, sizeof(config));
3898 device->vendor_id = config[0] | (config[1] << 8);
3899 device->device_id = config[2] | (config[3] << 8);
3900 device->revision_id = config[8];
3901 device->subvendor_id = config[44] | (config[45] << 8);
3902 device->subdevice_id = config[46] | (config[47] << 8);
3908 static int drmParsePciDeviceInfo(int maj, int min,
3909 drmPciDeviceInfoPtr device,
3913 if (!(flags & DRM_DEVICE_GET_PCI_REVISION))
3914 return parse_separate_sysfs_files(maj, min, device, true);
3916 if (parse_separate_sysfs_files(maj, min, device, false))
3917 return parse_config_sysfs_file(maj, min, device);
3920 #elif defined(__OpenBSD__) || defined(__DragonFly__)
3921 struct drm_pciinfo pinfo;
3924 type = drmGetMinorType(maj, min);
3928 fd = drmOpenMinor(min, 0, type);
3932 if (drmIoctl(fd, DRM_IOCTL_GET_PCIINFO, &pinfo)) {
3938 device->vendor_id = pinfo.vendor_id;
3939 device->device_id = pinfo.device_id;
3940 device->revision_id = pinfo.revision_id;
3941 device->subvendor_id = pinfo.subvendor_id;
3942 device->subdevice_id = pinfo.subdevice_id;
3945 #elif defined(__FreeBSD__)
3947 struct pci_conf_io pc;
3948 struct pci_match_conf patterns[1];
3949 struct pci_conf results[1];
3952 if (get_sysctl_pci_bus_info(maj, min, &info) != 0)
3955 fd = open("/dev/pci", O_RDONLY);
3959 bzero(&patterns, sizeof(patterns));
3960 patterns[0].pc_sel.pc_domain = info.domain;
3961 patterns[0].pc_sel.pc_bus = info.bus;
3962 patterns[0].pc_sel.pc_dev = info.dev;
3963 patterns[0].pc_sel.pc_func = info.func;
3964 patterns[0].flags = PCI_GETCONF_MATCH_DOMAIN | PCI_GETCONF_MATCH_BUS
3965 | PCI_GETCONF_MATCH_DEV | PCI_GETCONF_MATCH_FUNC;
3966 bzero(&pc, sizeof(struct pci_conf_io));
3967 pc.num_patterns = 1;
3968 pc.pat_buf_len = sizeof(patterns);
3969 pc.patterns = patterns;
3970 pc.match_buf_len = sizeof(results);
3971 pc.matches = results;
3973 if (ioctl(fd, PCIOCGETCONF, &pc) || pc.status == PCI_GETCONF_ERROR) {
3980 device->vendor_id = results[0].pc_vendor;
3981 device->device_id = results[0].pc_device;
3982 device->subvendor_id = results[0].pc_subvendor;
3983 device->subdevice_id = results[0].pc_subdevice;
3984 device->revision_id = results[0].pc_revid;
3988 #warning "Missing implementation of drmParsePciDeviceInfo"
3993 static void drmFreePlatformDevice(drmDevicePtr device)
3995 if (device->deviceinfo.platform) {
3996 if (device->deviceinfo.platform->compatible) {
3997 char **compatible = device->deviceinfo.platform->compatible;
3999 while (*compatible) {
4004 free(device->deviceinfo.platform->compatible);
4009 static void drmFreeHost1xDevice(drmDevicePtr device)
4011 if (device->deviceinfo.host1x) {
4012 if (device->deviceinfo.host1x->compatible) {
4013 char **compatible = device->deviceinfo.host1x->compatible;
4015 while (*compatible) {
4020 free(device->deviceinfo.host1x->compatible);
4025 drm_public void drmFreeDevice(drmDevicePtr *device)
4031 switch ((*device)->bustype) {
4032 case DRM_BUS_PLATFORM:
4033 drmFreePlatformDevice(*device);
4036 case DRM_BUS_HOST1X:
4037 drmFreeHost1xDevice(*device);
4046 drm_public void drmFreeDevices(drmDevicePtr devices[], int count)
4050 if (devices == NULL)
4053 for (i = 0; i < count; i++)
4055 drmFreeDevice(&devices[i]);
4058 static drmDevicePtr drmDeviceAlloc(unsigned int type, const char *node,
4059 size_t bus_size, size_t device_size,
4062 size_t max_node_length, extra, size;
4063 drmDevicePtr device;
4067 max_node_length = ALIGN(drmGetMaxNodeName(), sizeof(void *));
4068 extra = DRM_NODE_MAX * (sizeof(void *) + max_node_length);
4070 size = sizeof(*device) + extra + bus_size + device_size;
4072 device = calloc(1, size);
4076 device->available_nodes = 1 << type;
4078 ptr = (char *)device + sizeof(*device);
4079 device->nodes = (char **)ptr;
4081 ptr += DRM_NODE_MAX * sizeof(void *);
4083 for (i = 0; i < DRM_NODE_MAX; i++) {
4084 device->nodes[i] = ptr;
4085 ptr += max_node_length;
4088 memcpy(device->nodes[type], node, max_node_length);
4095 static int drmProcessPciDevice(drmDevicePtr *device,
4096 const char *node, int node_type,
4097 int maj, int min, bool fetch_deviceinfo,
4104 dev = drmDeviceAlloc(node_type, node, sizeof(drmPciBusInfo),
4105 sizeof(drmPciDeviceInfo), &addr);
4109 dev->bustype = DRM_BUS_PCI;
4111 dev->businfo.pci = (drmPciBusInfoPtr)addr;
4113 ret = drmParsePciBusInfo(maj, min, dev->businfo.pci);
4117 // Fetch the device info if the user has requested it
4118 if (fetch_deviceinfo) {
4119 addr += sizeof(drmPciBusInfo);
4120 dev->deviceinfo.pci = (drmPciDeviceInfoPtr)addr;
4122 ret = drmParsePciDeviceInfo(maj, min, dev->deviceinfo.pci, flags);
4137 static int drm_usb_dev_path(int maj, int min, char *path, size_t len)
4139 char *value, *tmp_path, *slash;
4140 bool usb_device, usb_interface;
4142 snprintf(path, len, "/sys/dev/char/%d:%d/device", maj, min);
4144 value = sysfs_uevent_get(path, "DEVTYPE");
4148 usb_device = strcmp(value, "usb_device") == 0;
4149 usb_interface = strcmp(value, "usb_interface") == 0;
4157 /* The parent of a usb_interface is a usb_device */
4159 tmp_path = realpath(path, NULL);
4163 slash = strrchr(tmp_path, '/');
4171 if (snprintf(path, len, "%s", tmp_path) >= (int)len) {
4181 static int drmParseUsbBusInfo(int maj, int min, drmUsbBusInfoPtr info)
4184 char path[PATH_MAX + 1], *value;
4185 unsigned int bus, dev;
4188 ret = drm_usb_dev_path(maj, min, path, sizeof(path));
4192 value = sysfs_uevent_get(path, "BUSNUM");
4196 ret = sscanf(value, "%03u", &bus);
4202 value = sysfs_uevent_get(path, "DEVNUM");
4206 ret = sscanf(value, "%03u", &dev);
4217 #warning "Missing implementation of drmParseUsbBusInfo"
4222 static int drmParseUsbDeviceInfo(int maj, int min, drmUsbDeviceInfoPtr info)
4225 char path[PATH_MAX + 1], *value;
4226 unsigned int vendor, product;
4229 ret = drm_usb_dev_path(maj, min, path, sizeof(path));
4233 value = sysfs_uevent_get(path, "PRODUCT");
4237 ret = sscanf(value, "%x/%x", &vendor, &product);
4243 info->vendor = vendor;
4244 info->product = product;
4248 #warning "Missing implementation of drmParseUsbDeviceInfo"
4253 static int drmProcessUsbDevice(drmDevicePtr *device, const char *node,
4254 int node_type, int maj, int min,
4255 bool fetch_deviceinfo, uint32_t flags)
4261 dev = drmDeviceAlloc(node_type, node, sizeof(drmUsbBusInfo),
4262 sizeof(drmUsbDeviceInfo), &ptr);
4266 dev->bustype = DRM_BUS_USB;
4268 dev->businfo.usb = (drmUsbBusInfoPtr)ptr;
4270 ret = drmParseUsbBusInfo(maj, min, dev->businfo.usb);
4274 if (fetch_deviceinfo) {
4275 ptr += sizeof(drmUsbBusInfo);
4276 dev->deviceinfo.usb = (drmUsbDeviceInfoPtr)ptr;
4278 ret = drmParseUsbDeviceInfo(maj, min, dev->deviceinfo.usb);
4292 static int drmParseOFBusInfo(int maj, int min, char *fullname)
4295 char path[PATH_MAX + 1], *name, *tmp_name;
4297 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
4299 name = sysfs_uevent_get(path, "OF_FULLNAME");
4302 /* If the device lacks OF data, pick the MODALIAS info */
4303 name = sysfs_uevent_get(path, "MODALIAS");
4307 /* .. and strip the MODALIAS=[platform,usb...]: part. */
4308 tmp_name = strrchr(name, ':');
4316 strncpy(fullname, tmp_name, DRM_PLATFORM_DEVICE_NAME_LEN);
4317 fullname[DRM_PLATFORM_DEVICE_NAME_LEN - 1] = '\0';
4322 #warning "Missing implementation of drmParseOFBusInfo"
4327 static int drmParseOFDeviceInfo(int maj, int min, char ***compatible)
4330 char path[PATH_MAX + 1], *value, *tmp_name;
4331 unsigned int count, i;
4334 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
4336 value = sysfs_uevent_get(path, "OF_COMPATIBLE_N");
4338 sscanf(value, "%u", &count);
4341 /* Assume one entry if the device lack OF data */
4345 *compatible = calloc(count + 1, sizeof(char *));
4349 for (i = 0; i < count; i++) {
4350 value = sysfs_uevent_get(path, "OF_COMPATIBLE_%u", i);
4353 /* If the device lacks OF data, pick the MODALIAS info */
4354 value = sysfs_uevent_get(path, "MODALIAS");
4360 /* .. and strip the MODALIAS=[platform,usb...]: part. */
4361 tmp_name = strrchr(value, ':');
4366 tmp_name = strdup(tmp_name + 1);
4370 (*compatible)[i] = tmp_name;
4377 free((*compatible)[i]);
4382 #warning "Missing implementation of drmParseOFDeviceInfo"
4387 static int drmProcessPlatformDevice(drmDevicePtr *device,
4388 const char *node, int node_type,
4389 int maj, int min, bool fetch_deviceinfo,
4396 dev = drmDeviceAlloc(node_type, node, sizeof(drmPlatformBusInfo),
4397 sizeof(drmPlatformDeviceInfo), &ptr);
4401 dev->bustype = DRM_BUS_PLATFORM;
4403 dev->businfo.platform = (drmPlatformBusInfoPtr)ptr;
4405 ret = drmParseOFBusInfo(maj, min, dev->businfo.platform->fullname);
4409 if (fetch_deviceinfo) {
4410 ptr += sizeof(drmPlatformBusInfo);
4411 dev->deviceinfo.platform = (drmPlatformDeviceInfoPtr)ptr;
4413 ret = drmParseOFDeviceInfo(maj, min, &dev->deviceinfo.platform->compatible);
4427 static int drmProcessHost1xDevice(drmDevicePtr *device,
4428 const char *node, int node_type,
4429 int maj, int min, bool fetch_deviceinfo,
4436 dev = drmDeviceAlloc(node_type, node, sizeof(drmHost1xBusInfo),
4437 sizeof(drmHost1xDeviceInfo), &ptr);
4441 dev->bustype = DRM_BUS_HOST1X;
4443 dev->businfo.host1x = (drmHost1xBusInfoPtr)ptr;
4445 ret = drmParseOFBusInfo(maj, min, dev->businfo.host1x->fullname);
4449 if (fetch_deviceinfo) {
4450 ptr += sizeof(drmHost1xBusInfo);
4451 dev->deviceinfo.host1x = (drmHost1xDeviceInfoPtr)ptr;
4453 ret = drmParseOFDeviceInfo(maj, min, &dev->deviceinfo.host1x->compatible);
4468 process_device(drmDevicePtr *device, const char *d_name,
4469 int req_subsystem_type,
4470 bool fetch_deviceinfo, uint32_t flags)
4473 char node[PATH_MAX + 1];
4474 int node_type, subsystem_type;
4475 unsigned int maj, min;
4477 node_type = drmGetNodeType(d_name);
4481 snprintf(node, PATH_MAX, "%s/%s", DRM_DIR_NAME, d_name);
4482 if (stat(node, &sbuf))
4485 maj = major(sbuf.st_rdev);
4486 min = minor(sbuf.st_rdev);
4488 if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode))
4491 subsystem_type = drmParseSubsystemType(maj, min);
4492 if (req_subsystem_type != -1 && req_subsystem_type != subsystem_type)
4495 switch (subsystem_type) {
4497 case DRM_BUS_VIRTIO:
4498 return drmProcessPciDevice(device, node, node_type, maj, min,
4499 fetch_deviceinfo, flags);
4501 return drmProcessUsbDevice(device, node, node_type, maj, min,
4502 fetch_deviceinfo, flags);
4503 case DRM_BUS_PLATFORM:
4504 return drmProcessPlatformDevice(device, node, node_type, maj, min,
4505 fetch_deviceinfo, flags);
4506 case DRM_BUS_HOST1X:
4507 return drmProcessHost1xDevice(device, node, node_type, maj, min,
4508 fetch_deviceinfo, flags);
4514 /* Consider devices located on the same bus as duplicate and fold the respective
4515 * entries into a single one.
4517 * Note: this leaves "gaps" in the array, while preserving the length.
4519 static void drmFoldDuplicatedDevices(drmDevicePtr local_devices[], int count)
4521 int node_type, i, j;
4523 for (i = 0; i < count; i++) {
4524 for (j = i + 1; j < count; j++) {
4525 if (drmDevicesEqual(local_devices[i], local_devices[j])) {
4526 local_devices[i]->available_nodes |= local_devices[j]->available_nodes;
4527 node_type = log2_int(local_devices[j]->available_nodes);
4528 memcpy(local_devices[i]->nodes[node_type],
4529 local_devices[j]->nodes[node_type], drmGetMaxNodeName());
4530 drmFreeDevice(&local_devices[j]);
4536 /* Check that the given flags are valid returning 0 on success */
4538 drm_device_validate_flags(uint32_t flags)
4540 return (flags & ~DRM_DEVICE_GET_PCI_REVISION);
4544 drm_device_has_rdev(drmDevicePtr device, dev_t find_rdev)
4548 for (int i = 0; i < DRM_NODE_MAX; i++) {
4549 if (device->available_nodes & 1 << i) {
4550 if (stat(device->nodes[i], &sbuf) == 0 &&
4551 sbuf.st_rdev == find_rdev)
4559 * The kernel drm core has a number of places that assume maximum of
4560 * 3x64 devices nodes. That's 64 for each of primary, control and
4561 * render nodes. Rounded it up to 256 for simplicity.
4563 #define MAX_DRM_NODES 256
4566 * Get information about a device from its dev_t identifier
4568 * \param find_rdev dev_t identifier of the device
4569 * \param flags feature/behaviour bitmask
4570 * \param device the address of a drmDevicePtr where the information
4571 * will be allocated in stored
4573 * \return zero on success, negative error code otherwise.
4575 drm_public int drmGetDeviceFromDevId(dev_t find_rdev, uint32_t flags, drmDevicePtr *device)
4579 * DRI device nodes on OpenBSD are not in their own directory, they reside
4580 * in /dev along with a large number of statically generated /dev nodes.
4581 * Avoid stat'ing all of /dev needlessly by implementing this custom path.
4584 char node[PATH_MAX + 1];
4585 const char *dev_name;
4586 int node_type, subsystem_type;
4587 int maj, min, n, ret;
4592 maj = major(find_rdev);
4593 min = minor(find_rdev);
4595 if (!drmNodeIsDRM(maj, min))
4598 node_type = drmGetMinorType(maj, min);
4599 if (node_type == -1)
4602 dev_name = drmGetDeviceName(node_type);
4606 n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min);
4607 if (n == -1 || n >= PATH_MAX)
4609 if (stat(node, &sbuf))
4612 subsystem_type = drmParseSubsystemType(maj, min);
4613 if (subsystem_type != DRM_BUS_PCI)
4616 ret = drmProcessPciDevice(&d, node, node_type, maj, min, true, flags);
4624 drmDevicePtr local_devices[MAX_DRM_NODES];
4627 struct dirent *dent;
4630 int ret, i, node_count;
4632 if (drm_device_validate_flags(flags))
4638 maj = major(find_rdev);
4639 min = minor(find_rdev);
4641 if (!drmNodeIsDRM(maj, min))
4644 subsystem_type = drmParseSubsystemType(maj, min);
4645 if (subsystem_type < 0)
4646 return subsystem_type;
4648 sysdir = opendir(DRM_DIR_NAME);
4653 while ((dent = readdir(sysdir))) {
4654 ret = process_device(&d, dent->d_name, subsystem_type, true, flags);
4658 if (i >= MAX_DRM_NODES) {
4659 fprintf(stderr, "More than %d drm nodes detected. "
4660 "Please report a bug - that should not happen.\n"
4661 "Skipping extra nodes\n", MAX_DRM_NODES);
4664 local_devices[i] = d;
4669 drmFoldDuplicatedDevices(local_devices, node_count);
4673 for (i = 0; i < node_count; i++) {
4674 if (!local_devices[i])
4677 if (drm_device_has_rdev(local_devices[i], find_rdev))
4678 *device = local_devices[i];
4680 drmFreeDevice(&local_devices[i]);
4684 if (*device == NULL)
4691 * Get information about the opened drm device
4693 * \param fd file descriptor of the drm device
4694 * \param flags feature/behaviour bitmask
4695 * \param device the address of a drmDevicePtr where the information
4696 * will be allocated in stored
4698 * \return zero on success, negative error code otherwise.
4700 * \note Unlike drmGetDevice it does not retrieve the pci device revision field
4701 * unless the DRM_DEVICE_GET_PCI_REVISION \p flag is set.
4703 drm_public int drmGetDevice2(int fd, uint32_t flags, drmDevicePtr *device)
4710 if (fstat(fd, &sbuf))
4713 if (!S_ISCHR(sbuf.st_mode))
4716 return drmGetDeviceFromDevId(sbuf.st_rdev, flags, device);
4720 * Get information about the opened drm device
4722 * \param fd file descriptor of the drm device
4723 * \param device the address of a drmDevicePtr where the information
4724 * will be allocated in stored
4726 * \return zero on success, negative error code otherwise.
4728 drm_public int drmGetDevice(int fd, drmDevicePtr *device)
4730 return drmGetDevice2(fd, DRM_DEVICE_GET_PCI_REVISION, device);
4734 * Get drm devices on the system
4736 * \param flags feature/behaviour bitmask
4737 * \param devices the array of devices with drmDevicePtr elements
4738 * can be NULL to get the device number first
4739 * \param max_devices the maximum number of devices for the array
4741 * \return on error - negative error code,
4742 * if devices is NULL - total number of devices available on the system,
4743 * alternatively the number of devices stored in devices[], which is
4744 * capped by the max_devices.
4746 * \note Unlike drmGetDevices it does not retrieve the pci device revision field
4747 * unless the DRM_DEVICE_GET_PCI_REVISION \p flag is set.
4749 drm_public int drmGetDevices2(uint32_t flags, drmDevicePtr devices[],
4752 drmDevicePtr local_devices[MAX_DRM_NODES];
4753 drmDevicePtr device;
4755 struct dirent *dent;
4756 int ret, i, node_count, device_count;
4758 if (drm_device_validate_flags(flags))
4761 sysdir = opendir(DRM_DIR_NAME);
4766 while ((dent = readdir(sysdir))) {
4767 ret = process_device(&device, dent->d_name, -1, devices != NULL, flags);
4771 if (i >= MAX_DRM_NODES) {
4772 fprintf(stderr, "More than %d drm nodes detected. "
4773 "Please report a bug - that should not happen.\n"
4774 "Skipping extra nodes\n", MAX_DRM_NODES);
4777 local_devices[i] = device;
4782 drmFoldDuplicatedDevices(local_devices, node_count);
4785 for (i = 0; i < node_count; i++) {
4786 if (!local_devices[i])
4789 if ((devices != NULL) && (device_count < max_devices))
4790 devices[device_count] = local_devices[i];
4792 drmFreeDevice(&local_devices[i]);
4799 if (devices != NULL)
4800 return MIN2(device_count, max_devices);
4802 return device_count;
4806 * Get drm devices on the system
4808 * \param devices the array of devices with drmDevicePtr elements
4809 * can be NULL to get the device number first
4810 * \param max_devices the maximum number of devices for the array
4812 * \return on error - negative error code,
4813 * if devices is NULL - total number of devices available on the system,
4814 * alternatively the number of devices stored in devices[], which is
4815 * capped by the max_devices.
4817 drm_public int drmGetDevices(drmDevicePtr devices[], int max_devices)
4819 return drmGetDevices2(DRM_DEVICE_GET_PCI_REVISION, devices, max_devices);
4822 drm_public char *drmGetDeviceNameFromFd2(int fd)
4826 char path[PATH_MAX + 1], *value;
4827 unsigned int maj, min;
4829 if (fstat(fd, &sbuf))
4832 maj = major(sbuf.st_rdev);
4833 min = minor(sbuf.st_rdev);
4835 if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode))
4838 snprintf(path, sizeof(path), "/sys/dev/char/%d:%d", maj, min);
4840 value = sysfs_uevent_get(path, "DEVNAME");
4844 snprintf(path, sizeof(path), "/dev/%s", value);
4847 return strdup(path);
4848 #elif defined(__FreeBSD__)
4849 return drmGetDeviceNameFromFd(fd);
4852 char node[PATH_MAX + 1];
4853 const char *dev_name;
4857 if (fstat(fd, &sbuf))
4860 maj = major(sbuf.st_rdev);
4861 min = minor(sbuf.st_rdev);
4863 if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode))
4866 node_type = drmGetMinorType(maj, min);
4867 if (node_type == -1)
4870 dev_name = drmGetDeviceName(node_type);
4874 n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min);
4875 if (n == -1 || n >= PATH_MAX)
4878 return strdup(node);
4882 drm_public int drmSyncobjCreate(int fd, uint32_t flags, uint32_t *handle)
4884 struct drm_syncobj_create args;
4890 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_CREATE, &args);
4893 *handle = args.handle;
4897 drm_public int drmSyncobjDestroy(int fd, uint32_t handle)
4899 struct drm_syncobj_destroy args;
4902 args.handle = handle;
4903 return drmIoctl(fd, DRM_IOCTL_SYNCOBJ_DESTROY, &args);
4906 drm_public int drmSyncobjHandleToFD(int fd, uint32_t handle, int *obj_fd)
4908 struct drm_syncobj_handle args;
4913 args.handle = handle;
4914 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD, &args);
4921 drm_public int drmSyncobjFDToHandle(int fd, int obj_fd, uint32_t *handle)
4923 struct drm_syncobj_handle args;
4929 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE, &args);
4932 *handle = args.handle;
4936 drm_public int drmSyncobjImportSyncFile(int fd, uint32_t handle,
4939 struct drm_syncobj_handle args;
4942 args.fd = sync_file_fd;
4943 args.handle = handle;
4944 args.flags = DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE;
4945 return drmIoctl(fd, DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE, &args);
4948 drm_public int drmSyncobjExportSyncFile(int fd, uint32_t handle,
4951 struct drm_syncobj_handle args;
4956 args.handle = handle;
4957 args.flags = DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE;
4958 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD, &args);
4961 *sync_file_fd = args.fd;
4965 drm_public int drmSyncobjWait(int fd, uint32_t *handles, unsigned num_handles,
4966 int64_t timeout_nsec, unsigned flags,
4967 uint32_t *first_signaled)
4969 struct drm_syncobj_wait args;
4973 args.handles = (uintptr_t)handles;
4974 args.timeout_nsec = timeout_nsec;
4975 args.count_handles = num_handles;
4978 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_WAIT, &args);
4983 *first_signaled = args.first_signaled;
4987 drm_public int drmSyncobjReset(int fd, const uint32_t *handles,
4988 uint32_t handle_count)
4990 struct drm_syncobj_array args;
4994 args.handles = (uintptr_t)handles;
4995 args.count_handles = handle_count;
4997 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_RESET, &args);
5001 drm_public int drmSyncobjSignal(int fd, const uint32_t *handles,
5002 uint32_t handle_count)
5004 struct drm_syncobj_array args;
5008 args.handles = (uintptr_t)handles;
5009 args.count_handles = handle_count;
5011 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_SIGNAL, &args);
5015 drm_public int drmSyncobjTimelineSignal(int fd, const uint32_t *handles,
5016 uint64_t *points, uint32_t handle_count)
5018 struct drm_syncobj_timeline_array args;
5022 args.handles = (uintptr_t)handles;
5023 args.points = (uintptr_t)points;
5024 args.count_handles = handle_count;
5026 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL, &args);
5030 drm_public int drmSyncobjTimelineWait(int fd, uint32_t *handles, uint64_t *points,
5031 unsigned num_handles,
5032 int64_t timeout_nsec, unsigned flags,
5033 uint32_t *first_signaled)
5035 struct drm_syncobj_timeline_wait args;
5039 args.handles = (uintptr_t)handles;
5040 args.points = (uintptr_t)points;
5041 args.timeout_nsec = timeout_nsec;
5042 args.count_handles = num_handles;
5045 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT, &args);
5050 *first_signaled = args.first_signaled;
5055 drm_public int drmSyncobjQuery(int fd, uint32_t *handles, uint64_t *points,
5056 uint32_t handle_count)
5058 struct drm_syncobj_timeline_array args;
5062 args.handles = (uintptr_t)handles;
5063 args.points = (uintptr_t)points;
5064 args.count_handles = handle_count;
5066 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_QUERY, &args);
5072 drm_public int drmSyncobjQuery2(int fd, uint32_t *handles, uint64_t *points,
5073 uint32_t handle_count, uint32_t flags)
5075 struct drm_syncobj_timeline_array args;
5078 args.handles = (uintptr_t)handles;
5079 args.points = (uintptr_t)points;
5080 args.count_handles = handle_count;
5083 return drmIoctl(fd, DRM_IOCTL_SYNCOBJ_QUERY, &args);
5087 drm_public int drmSyncobjTransfer(int fd,
5088 uint32_t dst_handle, uint64_t dst_point,
5089 uint32_t src_handle, uint64_t src_point,
5092 struct drm_syncobj_transfer args;
5096 args.src_handle = src_handle;
5097 args.dst_handle = dst_handle;
5098 args.src_point = src_point;
5099 args.dst_point = dst_point;
5102 ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_TRANSFER, &args);
5107 drm_public int drmSyncobjEventfd(int fd, uint32_t handle, uint64_t point, int ev_fd,
5110 struct drm_syncobj_eventfd args;
5113 args.handle = handle;
5118 return drmIoctl(fd, DRM_IOCTL_SYNCOBJ_EVENTFD, &args);
5122 drmGetFormatModifierFromSimpleTokens(uint64_t modifier)
5126 for (i = 0; i < ARRAY_SIZE(drm_format_modifier_table); i++) {
5127 if (drm_format_modifier_table[i].modifier == modifier)
5128 return strdup(drm_format_modifier_table[i].modifier_name);
5134 /** Retrieves a human-readable representation of a vendor (as a string) from
5135 * the format token modifier
5137 * \param modifier the format modifier token
5138 * \return a char pointer to the human-readable form of the vendor. Caller is
5139 * responsible for freeing it.
5142 drmGetFormatModifierVendor(uint64_t modifier)
5145 uint8_t vendor = fourcc_mod_get_vendor(modifier);
5147 for (i = 0; i < ARRAY_SIZE(drm_format_modifier_vendor_table); i++) {
5148 if (drm_format_modifier_vendor_table[i].vendor == vendor)
5149 return strdup(drm_format_modifier_vendor_table[i].vendor_name);
5155 /** Retrieves a human-readable representation string from a format token
5158 * If the dedicated function was not able to extract a valid name or searching
5159 * the format modifier was not in the table, this function would return NULL.
5161 * \param modifier the token format
5162 * \return a malloc'ed string representation of the modifier. Caller is
5163 * responsible for freeing the string returned.
5167 drmGetFormatModifierName(uint64_t modifier)
5169 uint8_t vendorid = fourcc_mod_get_vendor(modifier);
5170 char *modifier_found = NULL;
5173 for (i = 0; i < ARRAY_SIZE(modifier_format_vendor_table); i++) {
5174 if (modifier_format_vendor_table[i].vendor == vendorid)
5175 modifier_found = modifier_format_vendor_table[i].vendor_cb(modifier);
5178 if (!modifier_found)
5179 return drmGetFormatModifierFromSimpleTokens(modifier);
5181 return modifier_found;
5185 * Get a human-readable name for a DRM FourCC format.
5187 * \param format The format.
5188 * \return A malloc'ed string containing the format name. Caller is responsible
5192 drmGetFormatName(uint32_t format)
5198 be = (format & DRM_FORMAT_BIG_ENDIAN) ? "_BE" : "";
5199 format &= ~DRM_FORMAT_BIG_ENDIAN;
5201 if (format == DRM_FORMAT_INVALID)
5202 return strdup("INVALID");
5204 code[0] = (char) ((format >> 0) & 0xFF);
5205 code[1] = (char) ((format >> 8) & 0xFF);
5206 code[2] = (char) ((format >> 16) & 0xFF);
5207 code[3] = (char) ((format >> 24) & 0xFF);
5210 /* Trim spaces at the end */
5211 for (i = 3; i > 0 && code[i] == ' '; i--)
5214 str_size = strlen(code) + strlen(be) + 1;
5215 str = malloc(str_size);
5219 snprintf(str, str_size, "%s%s", code, be);