/** * \file xf86drm.c * User-level interface to DRM device * * \author Rickard E. (Rik) Faith * \author Kevin E. Martin */ /* * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define stat_t struct stat #include #include #include #ifdef MAJOR_IN_MKDEV #include #endif #ifdef MAJOR_IN_SYSMACROS #include #endif #if HAVE_SYS_SYSCTL_H #include #endif #include #include #if defined(__FreeBSD__) #include #include #endif #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) /* Not all systems have MAP_FAILED defined */ #ifndef MAP_FAILED #define MAP_FAILED ((void *)-1) #endif #include "xf86drm.h" #include "libdrm_macros.h" #include "drm_fourcc.h" #include "util_math.h" #ifdef __DragonFly__ #define DRM_MAJOR 145 #endif #ifdef __NetBSD__ #define DRM_MAJOR 34 #endif #ifdef __OpenBSD__ #ifdef __i386__ #define DRM_MAJOR 88 #else #define DRM_MAJOR 87 #endif #endif /* __OpenBSD__ */ #ifndef DRM_MAJOR #define DRM_MAJOR 226 /* Linux */ #endif #if defined(__OpenBSD__) || defined(__DragonFly__) struct drm_pciinfo { uint16_t domain; uint8_t bus; uint8_t dev; uint8_t func; uint16_t vendor_id; uint16_t device_id; uint16_t subvendor_id; uint16_t subdevice_id; uint8_t revision_id; }; #define DRM_IOCTL_GET_PCIINFO DRM_IOR(0x15, struct drm_pciinfo) #endif #define DRM_MSG_VERBOSITY 3 #define memclear(s) memset(&s, 0, sizeof(s)) static drmServerInfoPtr drm_server_info; static bool drmNodeIsDRM(int maj, int min); static char *drmGetMinorNameForFD(int fd, int type); #define DRM_MODIFIER(v, f, f_name) \ .modifier = DRM_FORMAT_MOD_##v ## _ ##f, \ .modifier_name = #f_name #define DRM_MODIFIER_INVALID(v, f_name) \ .modifier = DRM_FORMAT_MOD_INVALID, .modifier_name = #f_name #define DRM_MODIFIER_LINEAR(v, f_name) \ .modifier = DRM_FORMAT_MOD_LINEAR, .modifier_name = #f_name /* Intel is abit special as the format doesn't follow other vendors naming * scheme */ #define DRM_MODIFIER_INTEL(f, f_name) \ .modifier = I915_FORMAT_MOD_##f, .modifier_name = #f_name struct drmFormatModifierInfo { uint64_t modifier; const char *modifier_name; }; struct drmFormatModifierVendorInfo { uint8_t vendor; const char *vendor_name; }; #include "generated_static_table_fourcc.h" struct drmVendorInfo { uint8_t vendor; char *(*vendor_cb)(uint64_t modifier); }; struct drmFormatVendorModifierInfo { uint64_t modifier; const char *modifier_name; }; static char * drmGetFormatModifierNameFromArm(uint64_t modifier); static char * drmGetFormatModifierNameFromNvidia(uint64_t modifier); static char * drmGetFormatModifierNameFromAmd(uint64_t modifier); static char * drmGetFormatModifierNameFromAmlogic(uint64_t modifier); static const struct drmVendorInfo modifier_format_vendor_table[] = { { DRM_FORMAT_MOD_VENDOR_ARM, drmGetFormatModifierNameFromArm }, { DRM_FORMAT_MOD_VENDOR_NVIDIA, drmGetFormatModifierNameFromNvidia }, { DRM_FORMAT_MOD_VENDOR_AMD, drmGetFormatModifierNameFromAmd }, { DRM_FORMAT_MOD_VENDOR_AMLOGIC, drmGetFormatModifierNameFromAmlogic }, }; #ifndef AFBC_FORMAT_MOD_MODE_VALUE_MASK #define AFBC_FORMAT_MOD_MODE_VALUE_MASK 0x000fffffffffffffULL #endif static const struct drmFormatVendorModifierInfo arm_mode_value_table[] = { { AFBC_FORMAT_MOD_YTR, "YTR" }, { AFBC_FORMAT_MOD_SPLIT, "SPLIT" }, { AFBC_FORMAT_MOD_SPARSE, "SPARSE" }, { AFBC_FORMAT_MOD_CBR, "CBR" }, { AFBC_FORMAT_MOD_TILED, "TILED" }, { AFBC_FORMAT_MOD_SC, "SC" }, { AFBC_FORMAT_MOD_DB, "DB" }, { AFBC_FORMAT_MOD_BCH, "BCH" }, { AFBC_FORMAT_MOD_USM, "USM" }, }; static bool is_x_t_amd_gfx9_tile(uint64_t tile) { switch (tile) { case AMD_FMT_MOD_TILE_GFX9_64K_S_X: case AMD_FMT_MOD_TILE_GFX9_64K_D_X: case AMD_FMT_MOD_TILE_GFX9_64K_R_X: return true; } return false; } static char * drmGetFormatModifierNameFromArm(uint64_t modifier) { uint64_t type = (modifier >> 52) & 0xf; uint64_t mode_value = modifier & AFBC_FORMAT_MOD_MODE_VALUE_MASK; uint64_t block_size = mode_value & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK; FILE *fp; char *modifier_name = NULL; size_t size = 0; unsigned int i; const char *block = NULL; const char *mode = NULL; bool did_print_mode = false; /* misc type is already handled by the static table */ if (type != DRM_FORMAT_MOD_ARM_TYPE_AFBC) return NULL; fp = open_memstream(&modifier_name, &size); if (!fp) return NULL; /* add block, can only have a (single) block */ switch (block_size) { case AFBC_FORMAT_MOD_BLOCK_SIZE_16x16: block = "16x16"; break; case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8: block = "32x8"; break; case AFBC_FORMAT_MOD_BLOCK_SIZE_64x4: block = "64x4"; break; case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8_64x4: block = "32x8_64x4"; break; } if (!block) { fclose(fp); free(modifier_name); return NULL; } fprintf(fp, "BLOCK_SIZE=%s,", block); /* add mode */ for (i = 0; i < ARRAY_SIZE(arm_mode_value_table); i++) { if (arm_mode_value_table[i].modifier & mode_value) { mode = arm_mode_value_table[i].modifier_name; if (!did_print_mode) { fprintf(fp, "MODE=%s", mode); did_print_mode = true; } else { fprintf(fp, "|%s", mode); } } } fclose(fp); return modifier_name; } static char * drmGetFormatModifierNameFromNvidia(uint64_t modifier) { uint64_t height, kind, gen, sector, compression; height = modifier & 0xf; kind = (modifier >> 12) & 0xff; gen = (modifier >> 20) & 0x3; sector = (modifier >> 22) & 0x1; compression = (modifier >> 23) & 0x7; /* just in case there could other simpler modifiers, not yet added, avoid * testing against TEGRA_TILE */ if ((modifier & 0x10) == 0x10) { char *mod_nvidia; asprintf(&mod_nvidia, "BLOCK_LINEAR_2D,HEIGHT=%"PRIu64",KIND=%"PRIu64"," "GEN=%"PRIu64",SECTOR=%"PRIu64",COMPRESSION=%"PRIu64"", height, kind, gen, sector, compression); return mod_nvidia; } return NULL; } static void drmGetFormatModifierNameFromAmdDcc(uint64_t modifier, FILE *fp) { uint64_t dcc_max_compressed_block = AMD_FMT_MOD_GET(DCC_MAX_COMPRESSED_BLOCK, modifier); uint64_t dcc_retile = AMD_FMT_MOD_GET(DCC_RETILE, modifier); const char *dcc_max_compressed_block_str = NULL; fprintf(fp, ",DCC"); if (dcc_retile) fprintf(fp, ",DCC_RETILE"); if (!dcc_retile && AMD_FMT_MOD_GET(DCC_PIPE_ALIGN, modifier)) fprintf(fp, ",DCC_PIPE_ALIGN"); if (AMD_FMT_MOD_GET(DCC_INDEPENDENT_64B, modifier)) fprintf(fp, ",DCC_INDEPENDENT_64B"); if (AMD_FMT_MOD_GET(DCC_INDEPENDENT_128B, modifier)) fprintf(fp, ",DCC_INDEPENDENT_128B"); switch (dcc_max_compressed_block) { case AMD_FMT_MOD_DCC_BLOCK_64B: dcc_max_compressed_block_str = "64B"; break; case AMD_FMT_MOD_DCC_BLOCK_128B: dcc_max_compressed_block_str = "128B"; break; case AMD_FMT_MOD_DCC_BLOCK_256B: dcc_max_compressed_block_str = "256B"; break; } if (dcc_max_compressed_block_str) fprintf(fp, ",DCC_MAX_COMPRESSED_BLOCK=%s", dcc_max_compressed_block_str); if (AMD_FMT_MOD_GET(DCC_CONSTANT_ENCODE, modifier)) fprintf(fp, ",DCC_CONSTANT_ENCODE"); } static void drmGetFormatModifierNameFromAmdTile(uint64_t modifier, FILE *fp) { uint64_t pipe_xor_bits, bank_xor_bits, packers, rb; uint64_t pipe, pipe_align, dcc, dcc_retile, tile_version; pipe_align = AMD_FMT_MOD_GET(DCC_PIPE_ALIGN, modifier); pipe_xor_bits = AMD_FMT_MOD_GET(PIPE_XOR_BITS, modifier); dcc = AMD_FMT_MOD_GET(DCC, modifier); dcc_retile = AMD_FMT_MOD_GET(DCC_RETILE, modifier); tile_version = AMD_FMT_MOD_GET(TILE_VERSION, modifier); fprintf(fp, ",PIPE_XOR_BITS=%"PRIu64, pipe_xor_bits); if (tile_version == AMD_FMT_MOD_TILE_VER_GFX9) { bank_xor_bits = AMD_FMT_MOD_GET(BANK_XOR_BITS, modifier); fprintf(fp, ",BANK_XOR_BITS=%"PRIu64, bank_xor_bits); } if (tile_version == AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS) { packers = AMD_FMT_MOD_GET(PACKERS, modifier); fprintf(fp, ",PACKERS=%"PRIu64, packers); } if (dcc && tile_version == AMD_FMT_MOD_TILE_VER_GFX9) { rb = AMD_FMT_MOD_GET(RB, modifier); fprintf(fp, ",RB=%"PRIu64, rb); } if (dcc && tile_version == AMD_FMT_MOD_TILE_VER_GFX9 && (dcc_retile || pipe_align)) { pipe = AMD_FMT_MOD_GET(PIPE, modifier); fprintf(fp, ",PIPE_%"PRIu64, pipe); } } static char * drmGetFormatModifierNameFromAmd(uint64_t modifier) { uint64_t tile, tile_version, dcc; FILE *fp; char *mod_amd = NULL; size_t size = 0; const char *str_tile = NULL; const char *str_tile_version = NULL; tile = AMD_FMT_MOD_GET(TILE, modifier); tile_version = AMD_FMT_MOD_GET(TILE_VERSION, modifier); dcc = AMD_FMT_MOD_GET(DCC, modifier); fp = open_memstream(&mod_amd, &size); if (!fp) return NULL; /* add tile */ switch (tile_version) { case AMD_FMT_MOD_TILE_VER_GFX9: str_tile_version = "GFX9"; break; case AMD_FMT_MOD_TILE_VER_GFX10: str_tile_version = "GFX10"; break; case AMD_FMT_MOD_TILE_VER_GFX10_RBPLUS: str_tile_version = "GFX10_RBPLUS"; break; } if (str_tile_version) { fprintf(fp, "%s", str_tile_version); } else { fclose(fp); free(mod_amd); return NULL; } /* add tile str */ switch (tile) { case AMD_FMT_MOD_TILE_GFX9_64K_S: str_tile = "GFX9_64K_S"; break; case AMD_FMT_MOD_TILE_GFX9_64K_D: str_tile = "GFX9_64K_D"; break; case AMD_FMT_MOD_TILE_GFX9_64K_S_X: str_tile = "GFX9_64K_S_X"; break; case AMD_FMT_MOD_TILE_GFX9_64K_D_X: str_tile = "GFX9_64K_D_X"; break; case AMD_FMT_MOD_TILE_GFX9_64K_R_X: str_tile = "GFX9_64K_R_X"; break; } if (str_tile) fprintf(fp, ",%s", str_tile); if (dcc) drmGetFormatModifierNameFromAmdDcc(modifier, fp); if (tile_version >= AMD_FMT_MOD_TILE_VER_GFX9 && is_x_t_amd_gfx9_tile(tile)) drmGetFormatModifierNameFromAmdTile(modifier, fp); fclose(fp); return mod_amd; } static char * drmGetFormatModifierNameFromAmlogic(uint64_t modifier) { uint64_t layout = modifier & 0xff; uint64_t options = (modifier >> 8) & 0xff; char *mod_amlogic = NULL; const char *layout_str; const char *opts_str; switch (layout) { case AMLOGIC_FBC_LAYOUT_BASIC: layout_str = "BASIC"; break; case AMLOGIC_FBC_LAYOUT_SCATTER: layout_str = "SCATTER"; break; default: layout_str = "INVALID_LAYOUT"; break; } if (options & AMLOGIC_FBC_OPTION_MEM_SAVING) opts_str = "MEM_SAVING"; else opts_str = "0"; asprintf(&mod_amlogic, "FBC,LAYOUT=%s,OPTIONS=%s", layout_str, opts_str); return mod_amlogic; } static unsigned log2_int(unsigned x) { unsigned l; if (x < 2) { return 0; } for (l = 2; ; l++) { if ((unsigned)(1 << l) > x) { return l - 1; } } return 0; } drm_public void drmSetServerInfo(drmServerInfoPtr info) { drm_server_info = info; } /** * Output a message to stderr. * * \param format printf() like format string. * * \internal * This function is a wrapper around vfprintf(). */ static int DRM_PRINTFLIKE(1, 0) drmDebugPrint(const char *format, va_list ap) { return vfprintf(stderr, format, ap); } drm_public void drmMsg(const char *format, ...) { va_list ap; const char *env; if (((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) || (drm_server_info && drm_server_info->debug_print)) { va_start(ap, format); if (drm_server_info) { drm_server_info->debug_print(format,ap); } else { drmDebugPrint(format, ap); } va_end(ap); } } static void *drmHashTable = NULL; /* Context switch callbacks */ drm_public void *drmGetHashTable(void) { return drmHashTable; } drm_public void *drmMalloc(int size) { return calloc(1, size); } drm_public void drmFree(void *pt) { free(pt); } /** * Call ioctl, restarting if it is interrupted */ drm_public int drmIoctl(int fd, unsigned long request, void *arg) { int ret; do { ret = ioctl(fd, request, arg); } while (ret == -1 && (errno == EINTR || errno == EAGAIN)); return ret; } static unsigned long drmGetKeyFromFd(int fd) { stat_t st; st.st_rdev = 0; fstat(fd, &st); return st.st_rdev; } drm_public drmHashEntry *drmGetEntry(int fd) { unsigned long key = drmGetKeyFromFd(fd); void *value; drmHashEntry *entry; if (!drmHashTable) drmHashTable = drmHashCreate(); if (drmHashLookup(drmHashTable, key, &value)) { entry = drmMalloc(sizeof(*entry)); entry->fd = fd; entry->f = NULL; entry->tagTable = drmHashCreate(); drmHashInsert(drmHashTable, key, entry); } else { entry = value; } return entry; } /** * Compare two busid strings * * \param first * \param second * * \return 1 if matched. * * \internal * This function compares two bus ID strings. It understands the older * PCI:b:d:f format and the newer pci:oooo:bb:dd.f format. In the format, o is * domain, b is bus, d is device, f is function. */ static int drmMatchBusID(const char *id1, const char *id2, int pci_domain_ok) { /* First, check if the IDs are exactly the same */ if (strcasecmp(id1, id2) == 0) return 1; /* Try to match old/new-style PCI bus IDs. */ if (strncasecmp(id1, "pci", 3) == 0) { unsigned int o1, b1, d1, f1; unsigned int o2, b2, d2, f2; int ret; ret = sscanf(id1, "pci:%04x:%02x:%02x.%u", &o1, &b1, &d1, &f1); if (ret != 4) { o1 = 0; ret = sscanf(id1, "PCI:%u:%u:%u", &b1, &d1, &f1); if (ret != 3) return 0; } ret = sscanf(id2, "pci:%04x:%02x:%02x.%u", &o2, &b2, &d2, &f2); if (ret != 4) { o2 = 0; ret = sscanf(id2, "PCI:%u:%u:%u", &b2, &d2, &f2); if (ret != 3) return 0; } /* If domains aren't properly supported by the kernel interface, * just ignore them, which sucks less than picking a totally random * card with "open by name" */ if (!pci_domain_ok) o1 = o2 = 0; if ((o1 != o2) || (b1 != b2) || (d1 != d2) || (f1 != f2)) return 0; else return 1; } return 0; } /** * Handles error checking for chown call. * * \param path to file. * \param id of the new owner. * \param id of the new group. * * \return zero if success or -1 if failure. * * \internal * Checks for failure. If failure was caused by signal call chown again. * If any other failure happened then it will output error message using * drmMsg() call. */ #if !UDEV static int chown_check_return(const char *path, uid_t owner, gid_t group) { int rv; do { rv = chown(path, owner, group); } while (rv != 0 && errno == EINTR); if (rv == 0) return 0; drmMsg("Failed to change owner or group for file %s! %d: %s\n", path, errno, strerror(errno)); return -1; } #endif static const char *drmGetDeviceName(int type) { switch (type) { case DRM_NODE_PRIMARY: return DRM_DEV_NAME; case DRM_NODE_CONTROL: return DRM_CONTROL_DEV_NAME; case DRM_NODE_RENDER: return DRM_RENDER_DEV_NAME; } return NULL; } /** * Open the DRM device, creating it if necessary. * * \param dev major and minor numbers of the device. * \param minor minor number of the device. * * \return a file descriptor on success, or a negative value on error. * * \internal * Assembles the device name from \p minor and opens it, creating the device * special file node with the major and minor numbers specified by \p dev and * parent directory if necessary and was called by root. */ static int drmOpenDevice(dev_t dev, int minor, int type) { stat_t st; const char *dev_name = drmGetDeviceName(type); char buf[DRM_NODE_NAME_MAX]; int fd; mode_t devmode = DRM_DEV_MODE, serv_mode; gid_t serv_group; #if !UDEV int isroot = !geteuid(); uid_t user = DRM_DEV_UID; gid_t group = DRM_DEV_GID; #endif if (!dev_name) return -EINVAL; sprintf(buf, dev_name, DRM_DIR_NAME, minor); drmMsg("drmOpenDevice: node name is %s\n", buf); if (drm_server_info && drm_server_info->get_perms) { drm_server_info->get_perms(&serv_group, &serv_mode); devmode = serv_mode ? serv_mode : DRM_DEV_MODE; devmode &= ~(S_IXUSR|S_IXGRP|S_IXOTH); } #if !UDEV if (stat(DRM_DIR_NAME, &st)) { if (!isroot) return DRM_ERR_NOT_ROOT; mkdir(DRM_DIR_NAME, DRM_DEV_DIRMODE); chown_check_return(DRM_DIR_NAME, 0, 0); /* root:root */ chmod(DRM_DIR_NAME, DRM_DEV_DIRMODE); } /* Check if the device node exists and create it if necessary. */ if (stat(buf, &st)) { if (!isroot) return DRM_ERR_NOT_ROOT; remove(buf); mknod(buf, S_IFCHR | devmode, dev); } if (drm_server_info && drm_server_info->get_perms) { group = ((int)serv_group >= 0) ? serv_group : DRM_DEV_GID; chown_check_return(buf, user, group); chmod(buf, devmode); } #else /* if we modprobed then wait for udev */ { int udev_count = 0; wait_for_udev: if (stat(DRM_DIR_NAME, &st)) { usleep(20); udev_count++; if (udev_count == 50) return -1; goto wait_for_udev; } if (stat(buf, &st)) { usleep(20); udev_count++; if (udev_count == 50) return -1; goto wait_for_udev; } } #endif fd = open(buf, O_RDWR | O_CLOEXEC, 0); drmMsg("drmOpenDevice: open result is %d, (%s)\n", fd, fd < 0 ? strerror(errno) : "OK"); if (fd >= 0) return fd; #if !UDEV /* Check if the device node is not what we expect it to be, and recreate it * and try again if so. */ if (st.st_rdev != dev) { if (!isroot) return DRM_ERR_NOT_ROOT; remove(buf); mknod(buf, S_IFCHR | devmode, dev); if (drm_server_info && drm_server_info->get_perms) { chown_check_return(buf, user, group); chmod(buf, devmode); } } fd = open(buf, O_RDWR | O_CLOEXEC, 0); drmMsg("drmOpenDevice: open result is %d, (%s)\n", fd, fd < 0 ? strerror(errno) : "OK"); if (fd >= 0) return fd; drmMsg("drmOpenDevice: Open failed\n"); remove(buf); #endif return -errno; } /** * Open the DRM device * * \param minor device minor number. * \param create allow to create the device if set. * * \return a file descriptor on success, or a negative value on error. * * \internal * Calls drmOpenDevice() if \p create is set, otherwise assembles the device * name from \p minor and opens it. */ static int drmOpenMinor(int minor, int create, int type) { int fd; char buf[DRM_NODE_NAME_MAX]; const char *dev_name = drmGetDeviceName(type); if (create) return drmOpenDevice(makedev(DRM_MAJOR, minor), minor, type); if (!dev_name) return -EINVAL; sprintf(buf, dev_name, DRM_DIR_NAME, minor); if ((fd = open(buf, O_RDWR | O_CLOEXEC, 0)) >= 0) return fd; return -errno; } /** * Determine whether the DRM kernel driver has been loaded. * * \return 1 if the DRM driver is loaded, 0 otherwise. * * \internal * Determine the presence of the kernel driver by attempting to open the 0 * minor and get version information. For backward compatibility with older * Linux implementations, /proc/dri is also checked. */ drm_public int drmAvailable(void) { drmVersionPtr version; int retval = 0; int fd; if ((fd = drmOpenMinor(0, 1, DRM_NODE_PRIMARY)) < 0) { #ifdef __linux__ /* Try proc for backward Linux compatibility */ if (!access("/proc/dri/0", R_OK)) return 1; #endif return 0; } if ((version = drmGetVersion(fd))) { retval = 1; drmFreeVersion(version); } close(fd); return retval; } static int drmGetMinorBase(int type) { switch (type) { case DRM_NODE_PRIMARY: return 0; case DRM_NODE_CONTROL: return 64; case DRM_NODE_RENDER: return 128; default: return -1; }; } static int drmGetMinorType(int major, int minor) { #ifdef __FreeBSD__ char name[SPECNAMELEN]; int id; if (!devname_r(makedev(major, minor), S_IFCHR, name, sizeof(name))) return -1; if (sscanf(name, "drm/%d", &id) != 1) { // If not in /dev/drm/ we have the type in the name if (sscanf(name, "dri/card%d\n", &id) >= 1) return DRM_NODE_PRIMARY; else if (sscanf(name, "dri/control%d\n", &id) >= 1) return DRM_NODE_CONTROL; else if (sscanf(name, "dri/renderD%d\n", &id) >= 1) return DRM_NODE_RENDER; return -1; } minor = id; #endif int type = minor >> 6; if (minor < 0) return -1; switch (type) { case DRM_NODE_PRIMARY: case DRM_NODE_CONTROL: case DRM_NODE_RENDER: return type; default: return -1; } } static const char *drmGetMinorName(int type) { switch (type) { case DRM_NODE_PRIMARY: return DRM_PRIMARY_MINOR_NAME; case DRM_NODE_CONTROL: return DRM_CONTROL_MINOR_NAME; case DRM_NODE_RENDER: return DRM_RENDER_MINOR_NAME; default: return NULL; } } /** * Open the device by bus ID. * * \param busid bus ID. * \param type device node type. * * \return a file descriptor on success, or a negative value on error. * * \internal * This function attempts to open every possible minor (up to DRM_MAX_MINOR), * comparing the device bus ID with the one supplied. * * \sa drmOpenMinor() and drmGetBusid(). */ static int drmOpenByBusid(const char *busid, int type) { int i, pci_domain_ok = 1; int fd; const char *buf; drmSetVersion sv; int base = drmGetMinorBase(type); if (base < 0) return -1; drmMsg("drmOpenByBusid: Searching for BusID %s\n", busid); for (i = base; i < base + DRM_MAX_MINOR; i++) { fd = drmOpenMinor(i, 1, type); drmMsg("drmOpenByBusid: drmOpenMinor returns %d\n", fd); if (fd >= 0) { /* We need to try for 1.4 first for proper PCI domain support * and if that fails, we know the kernel is busted */ sv.drm_di_major = 1; sv.drm_di_minor = 4; sv.drm_dd_major = -1; /* Don't care */ sv.drm_dd_minor = -1; /* Don't care */ if (drmSetInterfaceVersion(fd, &sv)) { #ifndef __alpha__ pci_domain_ok = 0; #endif sv.drm_di_major = 1; sv.drm_di_minor = 1; sv.drm_dd_major = -1; /* Don't care */ sv.drm_dd_minor = -1; /* Don't care */ drmMsg("drmOpenByBusid: Interface 1.4 failed, trying 1.1\n"); drmSetInterfaceVersion(fd, &sv); } buf = drmGetBusid(fd); drmMsg("drmOpenByBusid: drmGetBusid reports %s\n", buf); if (buf && drmMatchBusID(buf, busid, pci_domain_ok)) { drmFreeBusid(buf); return fd; } if (buf) drmFreeBusid(buf); close(fd); } } return -1; } /** * Open the device by name. * * \param name driver name. * \param type the device node type. * * \return a file descriptor on success, or a negative value on error. * * \internal * This function opens the first minor number that matches the driver name and * isn't already in use. If it's in use it then it will already have a bus ID * assigned. * * \sa drmOpenMinor(), drmGetVersion() and drmGetBusid(). */ static int drmOpenByName(const char *name, int type) { int i; int fd; drmVersionPtr version; char * id; int base = drmGetMinorBase(type); if (base < 0) return -1; /* * Open the first minor number that matches the driver name and isn't * already in use. If it's in use it will have a busid assigned already. */ for (i = base; i < base + DRM_MAX_MINOR; i++) { if ((fd = drmOpenMinor(i, 1, type)) >= 0) { if ((version = drmGetVersion(fd))) { if (!strcmp(version->name, name)) { drmFreeVersion(version); id = drmGetBusid(fd); drmMsg("drmGetBusid returned '%s'\n", id ? id : "NULL"); if (!id || !*id) { if (id) drmFreeBusid(id); return fd; } else { drmFreeBusid(id); } } else { drmFreeVersion(version); } } close(fd); } } #ifdef __linux__ /* Backward-compatibility /proc support */ for (i = 0; i < 8; i++) { char proc_name[64], buf[512]; char *driver, *pt, *devstring; int retcode; sprintf(proc_name, "/proc/dri/%d/name", i); if ((fd = open(proc_name, O_RDONLY, 0)) >= 0) { retcode = read(fd, buf, sizeof(buf)-1); close(fd); if (retcode) { buf[retcode-1] = '\0'; for (driver = pt = buf; *pt && *pt != ' '; ++pt) ; if (*pt) { /* Device is next */ *pt = '\0'; if (!strcmp(driver, name)) { /* Match */ for (devstring = ++pt; *pt && *pt != ' '; ++pt) ; if (*pt) { /* Found busid */ return drmOpenByBusid(++pt, type); } else { /* No busid */ return drmOpenDevice(strtol(devstring, NULL, 0),i, type); } } } } } } #endif return -1; } /** * Open the DRM device. * * Looks up the specified name and bus ID, and opens the device found. The * entry in /dev/dri is created if necessary and if called by root. * * \param name driver name. Not referenced if bus ID is supplied. * \param busid bus ID. Zero if not known. * * \return a file descriptor on success, or a negative value on error. * * \internal * It calls drmOpenByBusid() if \p busid is specified or drmOpenByName() * otherwise. */ drm_public int drmOpen(const char *name, const char *busid) { return drmOpenWithType(name, busid, DRM_NODE_PRIMARY); } /** * Open the DRM device with specified type. * * Looks up the specified name and bus ID, and opens the device found. The * entry in /dev/dri is created if necessary and if called by root. * * \param name driver name. Not referenced if bus ID is supplied. * \param busid bus ID. Zero if not known. * \param type the device node type to open, PRIMARY, CONTROL or RENDER * * \return a file descriptor on success, or a negative value on error. * * \internal * It calls drmOpenByBusid() if \p busid is specified or drmOpenByName() * otherwise. */ drm_public int drmOpenWithType(const char *name, const char *busid, int type) { if (name != NULL && drm_server_info && drm_server_info->load_module && !drmAvailable()) { /* try to load the kernel module */ if (!drm_server_info->load_module(name)) { drmMsg("[drm] failed to load kernel module \"%s\"\n", name); return -1; } } if (busid) { int fd = drmOpenByBusid(busid, type); if (fd >= 0) return fd; } if (name) return drmOpenByName(name, type); return -1; } drm_public int drmOpenControl(int minor) { return drmOpenMinor(minor, 0, DRM_NODE_CONTROL); } drm_public int drmOpenRender(int minor) { return drmOpenMinor(minor, 0, DRM_NODE_RENDER); } /** * Free the version information returned by drmGetVersion(). * * \param v pointer to the version information. * * \internal * It frees the memory pointed by \p %v as well as all the non-null strings * pointers in it. */ drm_public void drmFreeVersion(drmVersionPtr v) { if (!v) return; drmFree(v->name); drmFree(v->date); drmFree(v->desc); drmFree(v); } /** * Free the non-public version information returned by the kernel. * * \param v pointer to the version information. * * \internal * Used by drmGetVersion() to free the memory pointed by \p %v as well as all * the non-null strings pointers in it. */ static void drmFreeKernelVersion(drm_version_t *v) { if (!v) return; drmFree(v->name); drmFree(v->date); drmFree(v->desc); drmFree(v); } /** * Copy version information. * * \param d destination pointer. * \param s source pointer. * * \internal * Used by drmGetVersion() to translate the information returned by the ioctl * interface in a private structure into the public structure counterpart. */ static void drmCopyVersion(drmVersionPtr d, const drm_version_t *s) { d->version_major = s->version_major; d->version_minor = s->version_minor; d->version_patchlevel = s->version_patchlevel; d->name_len = s->name_len; d->name = strdup(s->name); d->date_len = s->date_len; d->date = strdup(s->date); d->desc_len = s->desc_len; d->desc = strdup(s->desc); } /** * Query the driver version information. * * \param fd file descriptor. * * \return pointer to a drmVersion structure which should be freed with * drmFreeVersion(). * * \note Similar information is available via /proc/dri. * * \internal * It gets the version information via successive DRM_IOCTL_VERSION ioctls, * first with zeros to get the string lengths, and then the actually strings. * It also null-terminates them since they might not be already. */ drm_public drmVersionPtr drmGetVersion(int fd) { drmVersionPtr retval; drm_version_t *version = drmMalloc(sizeof(*version)); if (drmIoctl(fd, DRM_IOCTL_VERSION, version)) { drmFreeKernelVersion(version); return NULL; } if (version->name_len) version->name = drmMalloc(version->name_len + 1); if (version->date_len) version->date = drmMalloc(version->date_len + 1); if (version->desc_len) version->desc = drmMalloc(version->desc_len + 1); if (drmIoctl(fd, DRM_IOCTL_VERSION, version)) { drmMsg("DRM_IOCTL_VERSION: %s\n", strerror(errno)); drmFreeKernelVersion(version); return NULL; } /* The results might not be null-terminated strings, so terminate them. */ if (version->name_len) version->name[version->name_len] = '\0'; if (version->date_len) version->date[version->date_len] = '\0'; if (version->desc_len) version->desc[version->desc_len] = '\0'; retval = drmMalloc(sizeof(*retval)); drmCopyVersion(retval, version); drmFreeKernelVersion(version); return retval; } /** * Get version information for the DRM user space library. * * This version number is driver independent. * * \param fd file descriptor. * * \return version information. * * \internal * This function allocates and fills a drm_version structure with a hard coded * version number. */ drm_public drmVersionPtr drmGetLibVersion(int fd) { drm_version_t *version = drmMalloc(sizeof(*version)); /* Version history: * NOTE THIS MUST NOT GO ABOVE VERSION 1.X due to drivers needing it * revision 1.0.x = original DRM interface with no drmGetLibVersion * entry point and many drm extensions * revision 1.1.x = added drmCommand entry points for device extensions * added drmGetLibVersion to identify libdrm.a version * revision 1.2.x = added drmSetInterfaceVersion * modified drmOpen to handle both busid and name * revision 1.3.x = added server + memory manager */ version->version_major = 1; version->version_minor = 3; version->version_patchlevel = 0; return (drmVersionPtr)version; } drm_public int drmGetCap(int fd, uint64_t capability, uint64_t *value) { struct drm_get_cap cap; int ret; memclear(cap); cap.capability = capability; ret = drmIoctl(fd, DRM_IOCTL_GET_CAP, &cap); if (ret) return ret; *value = cap.value; return 0; } drm_public int drmSetClientCap(int fd, uint64_t capability, uint64_t value) { struct drm_set_client_cap cap; memclear(cap); cap.capability = capability; cap.value = value; return drmIoctl(fd, DRM_IOCTL_SET_CLIENT_CAP, &cap); } /** * Free the bus ID information. * * \param busid bus ID information string as given by drmGetBusid(). * * \internal * This function is just frees the memory pointed by \p busid. */ drm_public void drmFreeBusid(const char *busid) { drmFree((void *)busid); } /** * Get the bus ID of the device. * * \param fd file descriptor. * * \return bus ID string. * * \internal * This function gets the bus ID via successive DRM_IOCTL_GET_UNIQUE ioctls to * get the string length and data, passing the arguments in a drm_unique * structure. */ drm_public char *drmGetBusid(int fd) { drm_unique_t u; memclear(u); if (drmIoctl(fd, DRM_IOCTL_GET_UNIQUE, &u)) return NULL; u.unique = drmMalloc(u.unique_len + 1); if (drmIoctl(fd, DRM_IOCTL_GET_UNIQUE, &u)) { drmFree(u.unique); return NULL; } u.unique[u.unique_len] = '\0'; return u.unique; } /** * Set the bus ID of the device. * * \param fd file descriptor. * \param busid bus ID string. * * \return zero on success, negative on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_SET_UNIQUE ioctl, passing * the arguments in a drm_unique structure. */ drm_public int drmSetBusid(int fd, const char *busid) { drm_unique_t u; memclear(u); u.unique = (char *)busid; u.unique_len = strlen(busid); if (drmIoctl(fd, DRM_IOCTL_SET_UNIQUE, &u)) { return -errno; } return 0; } drm_public int drmGetMagic(int fd, drm_magic_t * magic) { drm_auth_t auth; memclear(auth); *magic = 0; if (drmIoctl(fd, DRM_IOCTL_GET_MAGIC, &auth)) return -errno; *magic = auth.magic; return 0; } drm_public int drmAuthMagic(int fd, drm_magic_t magic) { drm_auth_t auth; memclear(auth); auth.magic = magic; if (drmIoctl(fd, DRM_IOCTL_AUTH_MAGIC, &auth)) return -errno; return 0; } /** * Specifies a range of memory that is available for mapping by a * non-root process. * * \param fd file descriptor. * \param offset usually the physical address. The actual meaning depends of * the \p type parameter. See below. * \param size of the memory in bytes. * \param type type of the memory to be mapped. * \param flags combination of several flags to modify the function actions. * \param handle will be set to a value that may be used as the offset * parameter for mmap(). * * \return zero on success or a negative value on error. * * \par Mapping the frame buffer * For the frame buffer * - \p offset will be the physical address of the start of the frame buffer, * - \p size will be the size of the frame buffer in bytes, and * - \p type will be DRM_FRAME_BUFFER. * * \par * The area mapped will be uncached. If MTRR support is available in the * kernel, the frame buffer area will be set to write combining. * * \par Mapping the MMIO register area * For the MMIO register area, * - \p offset will be the physical address of the start of the register area, * - \p size will be the size of the register area bytes, and * - \p type will be DRM_REGISTERS. * \par * The area mapped will be uncached. * * \par Mapping the SAREA * For the SAREA, * - \p offset will be ignored and should be set to zero, * - \p size will be the desired size of the SAREA in bytes, * - \p type will be DRM_SHM. * * \par * A shared memory area of the requested size will be created and locked in * kernel memory. This area may be mapped into client-space by using the handle * returned. * * \note May only be called by root. * * \internal * This function is a wrapper around the DRM_IOCTL_ADD_MAP ioctl, passing * the arguments in a drm_map structure. */ drm_public int drmAddMap(int fd, drm_handle_t offset, drmSize size, drmMapType type, drmMapFlags flags, drm_handle_t *handle) { drm_map_t map; memclear(map); map.offset = offset; map.size = size; map.type = type; map.flags = flags; if (drmIoctl(fd, DRM_IOCTL_ADD_MAP, &map)) return -errno; if (handle) *handle = (drm_handle_t)(uintptr_t)map.handle; return 0; } drm_public int drmRmMap(int fd, drm_handle_t handle) { drm_map_t map; memclear(map); map.handle = (void *)(uintptr_t)handle; if(drmIoctl(fd, DRM_IOCTL_RM_MAP, &map)) return -errno; return 0; } /** * Make buffers available for DMA transfers. * * \param fd file descriptor. * \param count number of buffers. * \param size size of each buffer. * \param flags buffer allocation flags. * \param agp_offset offset in the AGP aperture * * \return number of buffers allocated, negative on error. * * \internal * This function is a wrapper around DRM_IOCTL_ADD_BUFS ioctl. * * \sa drm_buf_desc. */ drm_public int drmAddBufs(int fd, int count, int size, drmBufDescFlags flags, int agp_offset) { drm_buf_desc_t request; memclear(request); request.count = count; request.size = size; request.flags = flags; request.agp_start = agp_offset; if (drmIoctl(fd, DRM_IOCTL_ADD_BUFS, &request)) return -errno; return request.count; } drm_public int drmMarkBufs(int fd, double low, double high) { drm_buf_info_t info; int i; memclear(info); if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info)) return -EINVAL; if (!info.count) return -EINVAL; if (!(info.list = drmMalloc(info.count * sizeof(*info.list)))) return -ENOMEM; if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info)) { int retval = -errno; drmFree(info.list); return retval; } for (i = 0; i < info.count; i++) { info.list[i].low_mark = low * info.list[i].count; info.list[i].high_mark = high * info.list[i].count; if (drmIoctl(fd, DRM_IOCTL_MARK_BUFS, &info.list[i])) { int retval = -errno; drmFree(info.list); return retval; } } drmFree(info.list); return 0; } /** * Free buffers. * * \param fd file descriptor. * \param count number of buffers to free. * \param list list of buffers to be freed. * * \return zero on success, or a negative value on failure. * * \note This function is primarily used for debugging. * * \internal * This function is a wrapper around the DRM_IOCTL_FREE_BUFS ioctl, passing * the arguments in a drm_buf_free structure. */ drm_public int drmFreeBufs(int fd, int count, int *list) { drm_buf_free_t request; memclear(request); request.count = count; request.list = list; if (drmIoctl(fd, DRM_IOCTL_FREE_BUFS, &request)) return -errno; return 0; } /** * Close the device. * * \param fd file descriptor. * * \internal * This function closes the file descriptor. */ drm_public int drmClose(int fd) { unsigned long key = drmGetKeyFromFd(fd); drmHashEntry *entry = drmGetEntry(fd); drmHashDestroy(entry->tagTable); entry->fd = 0; entry->f = NULL; entry->tagTable = NULL; drmHashDelete(drmHashTable, key); drmFree(entry); return close(fd); } /** * Map a region of memory. * * \param fd file descriptor. * \param handle handle returned by drmAddMap(). * \param size size in bytes. Must match the size used by drmAddMap(). * \param address will contain the user-space virtual address where the mapping * begins. * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper for mmap(). */ drm_public int drmMap(int fd, drm_handle_t handle, drmSize size, drmAddressPtr address) { static unsigned long pagesize_mask = 0; if (fd < 0) return -EINVAL; if (!pagesize_mask) pagesize_mask = getpagesize() - 1; size = (size + pagesize_mask) & ~pagesize_mask; *address = drm_mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, handle); if (*address == MAP_FAILED) return -errno; return 0; } /** * Unmap mappings obtained with drmMap(). * * \param address address as given by drmMap(). * \param size size in bytes. Must match the size used by drmMap(). * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper for munmap(). */ drm_public int drmUnmap(drmAddress address, drmSize size) { return drm_munmap(address, size); } drm_public drmBufInfoPtr drmGetBufInfo(int fd) { drm_buf_info_t info; drmBufInfoPtr retval; int i; memclear(info); if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info)) return NULL; if (info.count) { if (!(info.list = drmMalloc(info.count * sizeof(*info.list)))) return NULL; if (drmIoctl(fd, DRM_IOCTL_INFO_BUFS, &info)) { drmFree(info.list); return NULL; } retval = drmMalloc(sizeof(*retval)); retval->count = info.count; if (!(retval->list = drmMalloc(info.count * sizeof(*retval->list)))) { drmFree(retval); drmFree(info.list); return NULL; } for (i = 0; i < info.count; i++) { retval->list[i].count = info.list[i].count; retval->list[i].size = info.list[i].size; retval->list[i].low_mark = info.list[i].low_mark; retval->list[i].high_mark = info.list[i].high_mark; } drmFree(info.list); return retval; } return NULL; } /** * Map all DMA buffers into client-virtual space. * * \param fd file descriptor. * * \return a pointer to a ::drmBufMap structure. * * \note The client may not use these buffers until obtaining buffer indices * with drmDMA(). * * \internal * This function calls the DRM_IOCTL_MAP_BUFS ioctl and copies the returned * information about the buffers in a drm_buf_map structure into the * client-visible data structures. */ drm_public drmBufMapPtr drmMapBufs(int fd) { drm_buf_map_t bufs; drmBufMapPtr retval; int i; memclear(bufs); if (drmIoctl(fd, DRM_IOCTL_MAP_BUFS, &bufs)) return NULL; if (!bufs.count) return NULL; if (!(bufs.list = drmMalloc(bufs.count * sizeof(*bufs.list)))) return NULL; if (drmIoctl(fd, DRM_IOCTL_MAP_BUFS, &bufs)) { drmFree(bufs.list); return NULL; } retval = drmMalloc(sizeof(*retval)); retval->count = bufs.count; retval->list = drmMalloc(bufs.count * sizeof(*retval->list)); for (i = 0; i < bufs.count; i++) { retval->list[i].idx = bufs.list[i].idx; retval->list[i].total = bufs.list[i].total; retval->list[i].used = 0; retval->list[i].address = bufs.list[i].address; } drmFree(bufs.list); return retval; } /** * Unmap buffers allocated with drmMapBufs(). * * \return zero on success, or negative value on failure. * * \internal * Calls munmap() for every buffer stored in \p bufs and frees the * memory allocated by drmMapBufs(). */ drm_public int drmUnmapBufs(drmBufMapPtr bufs) { int i; for (i = 0; i < bufs->count; i++) { drm_munmap(bufs->list[i].address, bufs->list[i].total); } drmFree(bufs->list); drmFree(bufs); return 0; } #define DRM_DMA_RETRY 16 /** * Reserve DMA buffers. * * \param fd file descriptor. * \param request * * \return zero on success, or a negative value on failure. * * \internal * Assemble the arguments into a drm_dma structure and keeps issuing the * DRM_IOCTL_DMA ioctl until success or until maximum number of retries. */ drm_public int drmDMA(int fd, drmDMAReqPtr request) { drm_dma_t dma; int ret, i = 0; dma.context = request->context; dma.send_count = request->send_count; dma.send_indices = request->send_list; dma.send_sizes = request->send_sizes; dma.flags = request->flags; dma.request_count = request->request_count; dma.request_size = request->request_size; dma.request_indices = request->request_list; dma.request_sizes = request->request_sizes; dma.granted_count = 0; do { ret = ioctl( fd, DRM_IOCTL_DMA, &dma ); } while ( ret && errno == EAGAIN && i++ < DRM_DMA_RETRY ); if ( ret == 0 ) { request->granted_count = dma.granted_count; return 0; } else { return -errno; } } /** * Obtain heavyweight hardware lock. * * \param fd file descriptor. * \param context context. * \param flags flags that determine the state of the hardware when the function * returns. * * \return always zero. * * \internal * This function translates the arguments into a drm_lock structure and issue * the DRM_IOCTL_LOCK ioctl until the lock is successfully acquired. */ drm_public int drmGetLock(int fd, drm_context_t context, drmLockFlags flags) { drm_lock_t lock; memclear(lock); lock.context = context; lock.flags = 0; if (flags & DRM_LOCK_READY) lock.flags |= _DRM_LOCK_READY; if (flags & DRM_LOCK_QUIESCENT) lock.flags |= _DRM_LOCK_QUIESCENT; if (flags & DRM_LOCK_FLUSH) lock.flags |= _DRM_LOCK_FLUSH; if (flags & DRM_LOCK_FLUSH_ALL) lock.flags |= _DRM_LOCK_FLUSH_ALL; if (flags & DRM_HALT_ALL_QUEUES) lock.flags |= _DRM_HALT_ALL_QUEUES; if (flags & DRM_HALT_CUR_QUEUES) lock.flags |= _DRM_HALT_CUR_QUEUES; while (drmIoctl(fd, DRM_IOCTL_LOCK, &lock)) ; return 0; } /** * Release the hardware lock. * * \param fd file descriptor. * \param context context. * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_UNLOCK ioctl, passing the * argument in a drm_lock structure. */ drm_public int drmUnlock(int fd, drm_context_t context) { drm_lock_t lock; memclear(lock); lock.context = context; return drmIoctl(fd, DRM_IOCTL_UNLOCK, &lock); } drm_public drm_context_t *drmGetReservedContextList(int fd, int *count) { drm_ctx_res_t res; drm_ctx_t *list; drm_context_t * retval; int i; memclear(res); if (drmIoctl(fd, DRM_IOCTL_RES_CTX, &res)) return NULL; if (!res.count) return NULL; if (!(list = drmMalloc(res.count * sizeof(*list)))) return NULL; if (!(retval = drmMalloc(res.count * sizeof(*retval)))) goto err_free_list; res.contexts = list; if (drmIoctl(fd, DRM_IOCTL_RES_CTX, &res)) goto err_free_context; for (i = 0; i < res.count; i++) retval[i] = list[i].handle; drmFree(list); *count = res.count; return retval; err_free_list: drmFree(list); err_free_context: drmFree(retval); return NULL; } drm_public void drmFreeReservedContextList(drm_context_t *pt) { drmFree(pt); } /** * Create context. * * Used by the X server during GLXContext initialization. This causes * per-context kernel-level resources to be allocated. * * \param fd file descriptor. * \param handle is set on success. To be used by the client when requesting DMA * dispatch with drmDMA(). * * \return zero on success, or a negative value on failure. * * \note May only be called by root. * * \internal * This function is a wrapper around the DRM_IOCTL_ADD_CTX ioctl, passing the * argument in a drm_ctx structure. */ drm_public int drmCreateContext(int fd, drm_context_t *handle) { drm_ctx_t ctx; memclear(ctx); if (drmIoctl(fd, DRM_IOCTL_ADD_CTX, &ctx)) return -errno; *handle = ctx.handle; return 0; } drm_public int drmSwitchToContext(int fd, drm_context_t context) { drm_ctx_t ctx; memclear(ctx); ctx.handle = context; if (drmIoctl(fd, DRM_IOCTL_SWITCH_CTX, &ctx)) return -errno; return 0; } drm_public int drmSetContextFlags(int fd, drm_context_t context, drm_context_tFlags flags) { drm_ctx_t ctx; /* * Context preserving means that no context switches are done between DMA * buffers from one context and the next. This is suitable for use in the * X server (which promises to maintain hardware context), or in the * client-side library when buffers are swapped on behalf of two threads. */ memclear(ctx); ctx.handle = context; if (flags & DRM_CONTEXT_PRESERVED) ctx.flags |= _DRM_CONTEXT_PRESERVED; if (flags & DRM_CONTEXT_2DONLY) ctx.flags |= _DRM_CONTEXT_2DONLY; if (drmIoctl(fd, DRM_IOCTL_MOD_CTX, &ctx)) return -errno; return 0; } drm_public int drmGetContextFlags(int fd, drm_context_t context, drm_context_tFlagsPtr flags) { drm_ctx_t ctx; memclear(ctx); ctx.handle = context; if (drmIoctl(fd, DRM_IOCTL_GET_CTX, &ctx)) return -errno; *flags = 0; if (ctx.flags & _DRM_CONTEXT_PRESERVED) *flags |= DRM_CONTEXT_PRESERVED; if (ctx.flags & _DRM_CONTEXT_2DONLY) *flags |= DRM_CONTEXT_2DONLY; return 0; } /** * Destroy context. * * Free any kernel-level resources allocated with drmCreateContext() associated * with the context. * * \param fd file descriptor. * \param handle handle given by drmCreateContext(). * * \return zero on success, or a negative value on failure. * * \note May only be called by root. * * \internal * This function is a wrapper around the DRM_IOCTL_RM_CTX ioctl, passing the * argument in a drm_ctx structure. */ drm_public int drmDestroyContext(int fd, drm_context_t handle) { drm_ctx_t ctx; memclear(ctx); ctx.handle = handle; if (drmIoctl(fd, DRM_IOCTL_RM_CTX, &ctx)) return -errno; return 0; } drm_public int drmCreateDrawable(int fd, drm_drawable_t *handle) { drm_draw_t draw; memclear(draw); if (drmIoctl(fd, DRM_IOCTL_ADD_DRAW, &draw)) return -errno; *handle = draw.handle; return 0; } drm_public int drmDestroyDrawable(int fd, drm_drawable_t handle) { drm_draw_t draw; memclear(draw); draw.handle = handle; if (drmIoctl(fd, DRM_IOCTL_RM_DRAW, &draw)) return -errno; return 0; } drm_public int drmUpdateDrawableInfo(int fd, drm_drawable_t handle, drm_drawable_info_type_t type, unsigned int num, void *data) { drm_update_draw_t update; memclear(update); update.handle = handle; update.type = type; update.num = num; update.data = (unsigned long long)(unsigned long)data; if (drmIoctl(fd, DRM_IOCTL_UPDATE_DRAW, &update)) return -errno; return 0; } drm_public int drmCrtcGetSequence(int fd, uint32_t crtcId, uint64_t *sequence, uint64_t *ns) { struct drm_crtc_get_sequence get_seq; int ret; memclear(get_seq); get_seq.crtc_id = crtcId; ret = drmIoctl(fd, DRM_IOCTL_CRTC_GET_SEQUENCE, &get_seq); if (ret) return ret; if (sequence) *sequence = get_seq.sequence; if (ns) *ns = get_seq.sequence_ns; return 0; } drm_public int drmCrtcQueueSequence(int fd, uint32_t crtcId, uint32_t flags, uint64_t sequence, uint64_t *sequence_queued, uint64_t user_data) { struct drm_crtc_queue_sequence queue_seq; int ret; memclear(queue_seq); queue_seq.crtc_id = crtcId; queue_seq.flags = flags; queue_seq.sequence = sequence; queue_seq.user_data = user_data; ret = drmIoctl(fd, DRM_IOCTL_CRTC_QUEUE_SEQUENCE, &queue_seq); if (ret == 0 && sequence_queued) *sequence_queued = queue_seq.sequence; return ret; } /** * Acquire the AGP device. * * Must be called before any of the other AGP related calls. * * \param fd file descriptor. * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_ACQUIRE ioctl. */ drm_public int drmAgpAcquire(int fd) { if (drmIoctl(fd, DRM_IOCTL_AGP_ACQUIRE, NULL)) return -errno; return 0; } /** * Release the AGP device. * * \param fd file descriptor. * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_RELEASE ioctl. */ drm_public int drmAgpRelease(int fd) { if (drmIoctl(fd, DRM_IOCTL_AGP_RELEASE, NULL)) return -errno; return 0; } /** * Set the AGP mode. * * \param fd file descriptor. * \param mode AGP mode. * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_ENABLE ioctl, passing the * argument in a drm_agp_mode structure. */ drm_public int drmAgpEnable(int fd, unsigned long mode) { drm_agp_mode_t m; memclear(m); m.mode = mode; if (drmIoctl(fd, DRM_IOCTL_AGP_ENABLE, &m)) return -errno; return 0; } /** * Allocate a chunk of AGP memory. * * \param fd file descriptor. * \param size requested memory size in bytes. Will be rounded to page boundary. * \param type type of memory to allocate. * \param address if not zero, will be set to the physical address of the * allocated memory. * \param handle on success will be set to a handle of the allocated memory. * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_ALLOC ioctl, passing the * arguments in a drm_agp_buffer structure. */ drm_public int drmAgpAlloc(int fd, unsigned long size, unsigned long type, unsigned long *address, drm_handle_t *handle) { drm_agp_buffer_t b; memclear(b); *handle = DRM_AGP_NO_HANDLE; b.size = size; b.type = type; if (drmIoctl(fd, DRM_IOCTL_AGP_ALLOC, &b)) return -errno; if (address != 0UL) *address = b.physical; *handle = b.handle; return 0; } /** * Free a chunk of AGP memory. * * \param fd file descriptor. * \param handle handle to the allocated memory, as given by drmAgpAllocate(). * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_FREE ioctl, passing the * argument in a drm_agp_buffer structure. */ drm_public int drmAgpFree(int fd, drm_handle_t handle) { drm_agp_buffer_t b; memclear(b); b.handle = handle; if (drmIoctl(fd, DRM_IOCTL_AGP_FREE, &b)) return -errno; return 0; } /** * Bind a chunk of AGP memory. * * \param fd file descriptor. * \param handle handle to the allocated memory, as given by drmAgpAllocate(). * \param offset offset in bytes. It will round to page boundary. * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_BIND ioctl, passing the * argument in a drm_agp_binding structure. */ drm_public int drmAgpBind(int fd, drm_handle_t handle, unsigned long offset) { drm_agp_binding_t b; memclear(b); b.handle = handle; b.offset = offset; if (drmIoctl(fd, DRM_IOCTL_AGP_BIND, &b)) return -errno; return 0; } /** * Unbind a chunk of AGP memory. * * \param fd file descriptor. * \param handle handle to the allocated memory, as given by drmAgpAllocate(). * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_UNBIND ioctl, passing * the argument in a drm_agp_binding structure. */ drm_public int drmAgpUnbind(int fd, drm_handle_t handle) { drm_agp_binding_t b; memclear(b); b.handle = handle; if (drmIoctl(fd, DRM_IOCTL_AGP_UNBIND, &b)) return -errno; return 0; } /** * Get AGP driver major version number. * * \param fd file descriptor. * * \return major version number on success, or a negative value on failure.. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the * necessary information in a drm_agp_info structure. */ drm_public int drmAgpVersionMajor(int fd) { drm_agp_info_t i; memclear(i); if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i)) return -errno; return i.agp_version_major; } /** * Get AGP driver minor version number. * * \param fd file descriptor. * * \return minor version number on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the * necessary information in a drm_agp_info structure. */ drm_public int drmAgpVersionMinor(int fd) { drm_agp_info_t i; memclear(i); if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i)) return -errno; return i.agp_version_minor; } /** * Get AGP mode. * * \param fd file descriptor. * * \return mode on success, or zero on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the * necessary information in a drm_agp_info structure. */ drm_public unsigned long drmAgpGetMode(int fd) { drm_agp_info_t i; memclear(i); if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; return i.mode; } /** * Get AGP aperture base. * * \param fd file descriptor. * * \return aperture base on success, zero on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the * necessary information in a drm_agp_info structure. */ drm_public unsigned long drmAgpBase(int fd) { drm_agp_info_t i; memclear(i); if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; return i.aperture_base; } /** * Get AGP aperture size. * * \param fd file descriptor. * * \return aperture size on success, zero on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the * necessary information in a drm_agp_info structure. */ drm_public unsigned long drmAgpSize(int fd) { drm_agp_info_t i; memclear(i); if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; return i.aperture_size; } /** * Get used AGP memory. * * \param fd file descriptor. * * \return memory used on success, or zero on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the * necessary information in a drm_agp_info structure. */ drm_public unsigned long drmAgpMemoryUsed(int fd) { drm_agp_info_t i; memclear(i); if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; return i.memory_used; } /** * Get available AGP memory. * * \param fd file descriptor. * * \return memory available on success, or zero on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the * necessary information in a drm_agp_info structure. */ drm_public unsigned long drmAgpMemoryAvail(int fd) { drm_agp_info_t i; memclear(i); if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; return i.memory_allowed; } /** * Get hardware vendor ID. * * \param fd file descriptor. * * \return vendor ID on success, or zero on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the * necessary information in a drm_agp_info structure. */ drm_public unsigned int drmAgpVendorId(int fd) { drm_agp_info_t i; memclear(i); if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; return i.id_vendor; } /** * Get hardware device ID. * * \param fd file descriptor. * * \return zero on success, or zero on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the * necessary information in a drm_agp_info structure. */ drm_public unsigned int drmAgpDeviceId(int fd) { drm_agp_info_t i; memclear(i); if (drmIoctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; return i.id_device; } drm_public int drmScatterGatherAlloc(int fd, unsigned long size, drm_handle_t *handle) { drm_scatter_gather_t sg; memclear(sg); *handle = 0; sg.size = size; if (drmIoctl(fd, DRM_IOCTL_SG_ALLOC, &sg)) return -errno; *handle = sg.handle; return 0; } drm_public int drmScatterGatherFree(int fd, drm_handle_t handle) { drm_scatter_gather_t sg; memclear(sg); sg.handle = handle; if (drmIoctl(fd, DRM_IOCTL_SG_FREE, &sg)) return -errno; return 0; } /** * Wait for VBLANK. * * \param fd file descriptor. * \param vbl pointer to a drmVBlank structure. * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_WAIT_VBLANK ioctl. */ drm_public int drmWaitVBlank(int fd, drmVBlankPtr vbl) { struct timespec timeout, cur; int ret; ret = clock_gettime(CLOCK_MONOTONIC, &timeout); if (ret < 0) { fprintf(stderr, "clock_gettime failed: %s\n", strerror(errno)); goto out; } timeout.tv_sec++; do { ret = ioctl(fd, DRM_IOCTL_WAIT_VBLANK, vbl); vbl->request.type &= ~DRM_VBLANK_RELATIVE; if (ret && errno == EINTR) { clock_gettime(CLOCK_MONOTONIC, &cur); /* Timeout after 1s */ if (cur.tv_sec > timeout.tv_sec + 1 || (cur.tv_sec == timeout.tv_sec && cur.tv_nsec >= timeout.tv_nsec)) { errno = EBUSY; ret = -1; break; } } } while (ret && errno == EINTR); out: return ret; } drm_public int drmError(int err, const char *label) { switch (err) { case DRM_ERR_NO_DEVICE: fprintf(stderr, "%s: no device\n", label); break; case DRM_ERR_NO_ACCESS: fprintf(stderr, "%s: no access\n", label); break; case DRM_ERR_NOT_ROOT: fprintf(stderr, "%s: not root\n", label); break; case DRM_ERR_INVALID: fprintf(stderr, "%s: invalid args\n", label); break; default: if (err < 0) err = -err; fprintf( stderr, "%s: error %d (%s)\n", label, err, strerror(err) ); break; } return 1; } /** * Install IRQ handler. * * \param fd file descriptor. * \param irq IRQ number. * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_CONTROL ioctl, passing the * argument in a drm_control structure. */ drm_public int drmCtlInstHandler(int fd, int irq) { drm_control_t ctl; memclear(ctl); ctl.func = DRM_INST_HANDLER; ctl.irq = irq; if (drmIoctl(fd, DRM_IOCTL_CONTROL, &ctl)) return -errno; return 0; } /** * Uninstall IRQ handler. * * \param fd file descriptor. * * \return zero on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_CONTROL ioctl, passing the * argument in a drm_control structure. */ drm_public int drmCtlUninstHandler(int fd) { drm_control_t ctl; memclear(ctl); ctl.func = DRM_UNINST_HANDLER; ctl.irq = 0; if (drmIoctl(fd, DRM_IOCTL_CONTROL, &ctl)) return -errno; return 0; } drm_public int drmFinish(int fd, int context, drmLockFlags flags) { drm_lock_t lock; memclear(lock); lock.context = context; if (flags & DRM_LOCK_READY) lock.flags |= _DRM_LOCK_READY; if (flags & DRM_LOCK_QUIESCENT) lock.flags |= _DRM_LOCK_QUIESCENT; if (flags & DRM_LOCK_FLUSH) lock.flags |= _DRM_LOCK_FLUSH; if (flags & DRM_LOCK_FLUSH_ALL) lock.flags |= _DRM_LOCK_FLUSH_ALL; if (flags & DRM_HALT_ALL_QUEUES) lock.flags |= _DRM_HALT_ALL_QUEUES; if (flags & DRM_HALT_CUR_QUEUES) lock.flags |= _DRM_HALT_CUR_QUEUES; if (drmIoctl(fd, DRM_IOCTL_FINISH, &lock)) return -errno; return 0; } /** * Get IRQ from bus ID. * * \param fd file descriptor. * \param busnum bus number. * \param devnum device number. * \param funcnum function number. * * \return IRQ number on success, or a negative value on failure. * * \internal * This function is a wrapper around the DRM_IOCTL_IRQ_BUSID ioctl, passing the * arguments in a drm_irq_busid structure. */ drm_public int drmGetInterruptFromBusID(int fd, int busnum, int devnum, int funcnum) { drm_irq_busid_t p; memclear(p); p.busnum = busnum; p.devnum = devnum; p.funcnum = funcnum; if (drmIoctl(fd, DRM_IOCTL_IRQ_BUSID, &p)) return -errno; return p.irq; } drm_public int drmAddContextTag(int fd, drm_context_t context, void *tag) { drmHashEntry *entry = drmGetEntry(fd); if (drmHashInsert(entry->tagTable, context, tag)) { drmHashDelete(entry->tagTable, context); drmHashInsert(entry->tagTable, context, tag); } return 0; } drm_public int drmDelContextTag(int fd, drm_context_t context) { drmHashEntry *entry = drmGetEntry(fd); return drmHashDelete(entry->tagTable, context); } drm_public void *drmGetContextTag(int fd, drm_context_t context) { drmHashEntry *entry = drmGetEntry(fd); void *value; if (drmHashLookup(entry->tagTable, context, &value)) return NULL; return value; } drm_public int drmAddContextPrivateMapping(int fd, drm_context_t ctx_id, drm_handle_t handle) { drm_ctx_priv_map_t map; memclear(map); map.ctx_id = ctx_id; map.handle = (void *)(uintptr_t)handle; if (drmIoctl(fd, DRM_IOCTL_SET_SAREA_CTX, &map)) return -errno; return 0; } drm_public int drmGetContextPrivateMapping(int fd, drm_context_t ctx_id, drm_handle_t *handle) { drm_ctx_priv_map_t map; memclear(map); map.ctx_id = ctx_id; if (drmIoctl(fd, DRM_IOCTL_GET_SAREA_CTX, &map)) return -errno; if (handle) *handle = (drm_handle_t)(uintptr_t)map.handle; return 0; } drm_public int drmGetMap(int fd, int idx, drm_handle_t *offset, drmSize *size, drmMapType *type, drmMapFlags *flags, drm_handle_t *handle, int *mtrr) { drm_map_t map; memclear(map); map.offset = idx; if (drmIoctl(fd, DRM_IOCTL_GET_MAP, &map)) return -errno; *offset = map.offset; *size = map.size; *type = map.type; *flags = map.flags; *handle = (unsigned long)map.handle; *mtrr = map.mtrr; return 0; } drm_public int drmGetClient(int fd, int idx, int *auth, int *pid, int *uid, unsigned long *magic, unsigned long *iocs) { drm_client_t client; memclear(client); client.idx = idx; if (drmIoctl(fd, DRM_IOCTL_GET_CLIENT, &client)) return -errno; *auth = client.auth; *pid = client.pid; *uid = client.uid; *magic = client.magic; *iocs = client.iocs; return 0; } drm_public int drmGetStats(int fd, drmStatsT *stats) { drm_stats_t s; unsigned i; memclear(s); if (drmIoctl(fd, DRM_IOCTL_GET_STATS, &s)) return -errno; stats->count = 0; memset(stats, 0, sizeof(*stats)); if (s.count > sizeof(stats->data)/sizeof(stats->data[0])) return -1; #define SET_VALUE \ stats->data[i].long_format = "%-20.20s"; \ stats->data[i].rate_format = "%8.8s"; \ stats->data[i].isvalue = 1; \ stats->data[i].verbose = 0 #define SET_COUNT \ stats->data[i].long_format = "%-20.20s"; \ stats->data[i].rate_format = "%5.5s"; \ stats->data[i].isvalue = 0; \ stats->data[i].mult_names = "kgm"; \ stats->data[i].mult = 1000; \ stats->data[i].verbose = 0 #define SET_BYTE \ stats->data[i].long_format = "%-20.20s"; \ stats->data[i].rate_format = "%5.5s"; \ stats->data[i].isvalue = 0; \ stats->data[i].mult_names = "KGM"; \ stats->data[i].mult = 1024; \ stats->data[i].verbose = 0 stats->count = s.count; for (i = 0; i < s.count; i++) { stats->data[i].value = s.data[i].value; switch (s.data[i].type) { case _DRM_STAT_LOCK: stats->data[i].long_name = "Lock"; stats->data[i].rate_name = "Lock"; SET_VALUE; break; case _DRM_STAT_OPENS: stats->data[i].long_name = "Opens"; stats->data[i].rate_name = "O"; SET_COUNT; stats->data[i].verbose = 1; break; case _DRM_STAT_CLOSES: stats->data[i].long_name = "Closes"; stats->data[i].rate_name = "Lock"; SET_COUNT; stats->data[i].verbose = 1; break; case _DRM_STAT_IOCTLS: stats->data[i].long_name = "Ioctls"; stats->data[i].rate_name = "Ioc/s"; SET_COUNT; break; case _DRM_STAT_LOCKS: stats->data[i].long_name = "Locks"; stats->data[i].rate_name = "Lck/s"; SET_COUNT; break; case _DRM_STAT_UNLOCKS: stats->data[i].long_name = "Unlocks"; stats->data[i].rate_name = "Unl/s"; SET_COUNT; break; case _DRM_STAT_IRQ: stats->data[i].long_name = "IRQs"; stats->data[i].rate_name = "IRQ/s"; SET_COUNT; break; case _DRM_STAT_PRIMARY: stats->data[i].long_name = "Primary Bytes"; stats->data[i].rate_name = "PB/s"; SET_BYTE; break; case _DRM_STAT_SECONDARY: stats->data[i].long_name = "Secondary Bytes"; stats->data[i].rate_name = "SB/s"; SET_BYTE; break; case _DRM_STAT_DMA: stats->data[i].long_name = "DMA"; stats->data[i].rate_name = "DMA/s"; SET_COUNT; break; case _DRM_STAT_SPECIAL: stats->data[i].long_name = "Special DMA"; stats->data[i].rate_name = "dma/s"; SET_COUNT; break; case _DRM_STAT_MISSED: stats->data[i].long_name = "Miss"; stats->data[i].rate_name = "Ms/s"; SET_COUNT; break; case _DRM_STAT_VALUE: stats->data[i].long_name = "Value"; stats->data[i].rate_name = "Value"; SET_VALUE; break; case _DRM_STAT_BYTE: stats->data[i].long_name = "Bytes"; stats->data[i].rate_name = "B/s"; SET_BYTE; break; case _DRM_STAT_COUNT: default: stats->data[i].long_name = "Count"; stats->data[i].rate_name = "Cnt/s"; SET_COUNT; break; } } return 0; } /** * Issue a set-version ioctl. * * \param fd file descriptor. * \param drmCommandIndex command index * \param data source pointer of the data to be read and written. * \param size size of the data to be read and written. * * \return zero on success, or a negative value on failure. * * \internal * It issues a read-write ioctl given by * \code DRM_COMMAND_BASE + drmCommandIndex \endcode. */ drm_public int drmSetInterfaceVersion(int fd, drmSetVersion *version) { int retcode = 0; drm_set_version_t sv; memclear(sv); sv.drm_di_major = version->drm_di_major; sv.drm_di_minor = version->drm_di_minor; sv.drm_dd_major = version->drm_dd_major; sv.drm_dd_minor = version->drm_dd_minor; if (drmIoctl(fd, DRM_IOCTL_SET_VERSION, &sv)) { retcode = -errno; } version->drm_di_major = sv.drm_di_major; version->drm_di_minor = sv.drm_di_minor; version->drm_dd_major = sv.drm_dd_major; version->drm_dd_minor = sv.drm_dd_minor; return retcode; } /** * Send a device-specific command. * * \param fd file descriptor. * \param drmCommandIndex command index * * \return zero on success, or a negative value on failure. * * \internal * It issues a ioctl given by * \code DRM_COMMAND_BASE + drmCommandIndex \endcode. */ drm_public int drmCommandNone(int fd, unsigned long drmCommandIndex) { unsigned long request; request = DRM_IO( DRM_COMMAND_BASE + drmCommandIndex); if (drmIoctl(fd, request, NULL)) { return -errno; } return 0; } /** * Send a device-specific read command. * * \param fd file descriptor. * \param drmCommandIndex command index * \param data destination pointer of the data to be read. * \param size size of the data to be read. * * \return zero on success, or a negative value on failure. * * \internal * It issues a read ioctl given by * \code DRM_COMMAND_BASE + drmCommandIndex \endcode. */ drm_public int drmCommandRead(int fd, unsigned long drmCommandIndex, void *data, unsigned long size) { unsigned long request; request = DRM_IOC( DRM_IOC_READ, DRM_IOCTL_BASE, DRM_COMMAND_BASE + drmCommandIndex, size); if (drmIoctl(fd, request, data)) { return -errno; } return 0; } /** * Send a device-specific write command. * * \param fd file descriptor. * \param drmCommandIndex command index * \param data source pointer of the data to be written. * \param size size of the data to be written. * * \return zero on success, or a negative value on failure. * * \internal * It issues a write ioctl given by * \code DRM_COMMAND_BASE + drmCommandIndex \endcode. */ drm_public int drmCommandWrite(int fd, unsigned long drmCommandIndex, void *data, unsigned long size) { unsigned long request; request = DRM_IOC( DRM_IOC_WRITE, DRM_IOCTL_BASE, DRM_COMMAND_BASE + drmCommandIndex, size); if (drmIoctl(fd, request, data)) { return -errno; } return 0; } /** * Send a device-specific read-write command. * * \param fd file descriptor. * \param drmCommandIndex command index * \param data source pointer of the data to be read and written. * \param size size of the data to be read and written. * * \return zero on success, or a negative value on failure. * * \internal * It issues a read-write ioctl given by * \code DRM_COMMAND_BASE + drmCommandIndex \endcode. */ drm_public int drmCommandWriteRead(int fd, unsigned long drmCommandIndex, void *data, unsigned long size) { unsigned long request; request = DRM_IOC( DRM_IOC_READ|DRM_IOC_WRITE, DRM_IOCTL_BASE, DRM_COMMAND_BASE + drmCommandIndex, size); if (drmIoctl(fd, request, data)) return -errno; return 0; } #define DRM_MAX_FDS 16 static struct { char *BusID; int fd; int refcount; int type; } connection[DRM_MAX_FDS]; static int nr_fds = 0; drm_public int drmOpenOnce(void *unused, const char *BusID, int *newlyopened) { return drmOpenOnceWithType(BusID, newlyopened, DRM_NODE_PRIMARY); } drm_public int drmOpenOnceWithType(const char *BusID, int *newlyopened, int type) { int i; int fd; for (i = 0; i < nr_fds; i++) if ((strcmp(BusID, connection[i].BusID) == 0) && (connection[i].type == type)) { connection[i].refcount++; *newlyopened = 0; return connection[i].fd; } fd = drmOpenWithType(NULL, BusID, type); if (fd < 0 || nr_fds == DRM_MAX_FDS) return fd; connection[nr_fds].BusID = strdup(BusID); connection[nr_fds].fd = fd; connection[nr_fds].refcount = 1; connection[nr_fds].type = type; *newlyopened = 1; if (0) fprintf(stderr, "saved connection %d for %s %d\n", nr_fds, connection[nr_fds].BusID, strcmp(BusID, connection[nr_fds].BusID)); nr_fds++; return fd; } drm_public void drmCloseOnce(int fd) { int i; for (i = 0; i < nr_fds; i++) { if (fd == connection[i].fd) { if (--connection[i].refcount == 0) { drmClose(connection[i].fd); free(connection[i].BusID); if (i < --nr_fds) connection[i] = connection[nr_fds]; return; } } } } drm_public int drmSetMaster(int fd) { return drmIoctl(fd, DRM_IOCTL_SET_MASTER, NULL); } drm_public int drmDropMaster(int fd) { return drmIoctl(fd, DRM_IOCTL_DROP_MASTER, NULL); } drm_public int drmIsMaster(int fd) { /* Detect master by attempting something that requires master. * * Authenticating magic tokens requires master and 0 is an * internal kernel detail which we could use. Attempting this on * a master fd would fail therefore fail with EINVAL because 0 * is invalid. * * A non-master fd will fail with EACCES, as the kernel checks * for master before attempting to do anything else. * * Since we don't want to leak implementation details, use * EACCES. */ return drmAuthMagic(fd, 0) != -EACCES; } drm_public char *drmGetDeviceNameFromFd(int fd) { #ifdef __FreeBSD__ struct stat sbuf; int maj, min; int nodetype; if (fstat(fd, &sbuf)) return NULL; maj = major(sbuf.st_rdev); min = minor(sbuf.st_rdev); nodetype = drmGetMinorType(maj, min); return drmGetMinorNameForFD(fd, nodetype); #else char name[128]; struct stat sbuf; dev_t d; int i; /* The whole drmOpen thing is a fiasco and we need to find a way * back to just using open(2). For now, however, lets just make * things worse with even more ad hoc directory walking code to * discover the device file name. */ fstat(fd, &sbuf); d = sbuf.st_rdev; for (i = 0; i < DRM_MAX_MINOR; i++) { snprintf(name, sizeof name, DRM_DEV_NAME, DRM_DIR_NAME, i); if (stat(name, &sbuf) == 0 && sbuf.st_rdev == d) break; } if (i == DRM_MAX_MINOR) return NULL; return strdup(name); #endif } static bool drmNodeIsDRM(int maj, int min) { #ifdef __linux__ char path[64]; struct stat sbuf; snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device/drm", maj, min); return stat(path, &sbuf) == 0; #elif defined(__FreeBSD__) char name[SPECNAMELEN]; if (!devname_r(makedev(maj, min), S_IFCHR, name, sizeof(name))) return 0; /* Handle drm/ and dri/ as both are present in different FreeBSD version * FreeBSD on amd64/i386/powerpc external kernel modules create node in * in /dev/drm/ and links in /dev/dri while a WIP in kernel driver creates * only device nodes in /dev/dri/ */ return (!strncmp(name, "drm/", 4) || !strncmp(name, "dri/", 4)); #else return maj == DRM_MAJOR; #endif } drm_public int drmGetNodeTypeFromFd(int fd) { struct stat sbuf; int maj, min, type; if (fstat(fd, &sbuf)) return -1; maj = major(sbuf.st_rdev); min = minor(sbuf.st_rdev); if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode)) { errno = EINVAL; return -1; } type = drmGetMinorType(maj, min); if (type == -1) errno = ENODEV; return type; } drm_public int drmPrimeHandleToFD(int fd, uint32_t handle, uint32_t flags, int *prime_fd) { struct drm_prime_handle args; int ret; memclear(args); args.fd = -1; args.handle = handle; args.flags = flags; ret = drmIoctl(fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args); if (ret) return ret; *prime_fd = args.fd; return 0; } drm_public int drmPrimeFDToHandle(int fd, int prime_fd, uint32_t *handle) { struct drm_prime_handle args; int ret; memclear(args); args.fd = prime_fd; ret = drmIoctl(fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &args); if (ret) return ret; *handle = args.handle; return 0; } drm_public int drmCloseBufferHandle(int fd, uint32_t handle) { struct drm_gem_close args; memclear(args); args.handle = handle; return drmIoctl(fd, DRM_IOCTL_GEM_CLOSE, &args); } static char *drmGetMinorNameForFD(int fd, int type) { #ifdef __linux__ DIR *sysdir; struct dirent *ent; struct stat sbuf; const char *name = drmGetMinorName(type); int len; char dev_name[64], buf[64]; int maj, min; if (!name) return NULL; len = strlen(name); if (fstat(fd, &sbuf)) return NULL; maj = major(sbuf.st_rdev); min = minor(sbuf.st_rdev); if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode)) return NULL; snprintf(buf, sizeof(buf), "/sys/dev/char/%d:%d/device/drm", maj, min); sysdir = opendir(buf); if (!sysdir) return NULL; while ((ent = readdir(sysdir))) { if (strncmp(ent->d_name, name, len) == 0) { snprintf(dev_name, sizeof(dev_name), DRM_DIR_NAME "/%s", ent->d_name); closedir(sysdir); return strdup(dev_name); } } closedir(sysdir); return NULL; #elif defined(__FreeBSD__) struct stat sbuf; char dname[SPECNAMELEN]; const char *mname; char name[SPECNAMELEN]; int id, maj, min, nodetype, i; if (fstat(fd, &sbuf)) return NULL; maj = major(sbuf.st_rdev); min = minor(sbuf.st_rdev); if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode)) return NULL; if (!devname_r(sbuf.st_rdev, S_IFCHR, dname, sizeof(dname))) return NULL; /* Handle both /dev/drm and /dev/dri * FreeBSD on amd64/i386/powerpc external kernel modules create node in * in /dev/drm/ and links in /dev/dri while a WIP in kernel driver creates * only device nodes in /dev/dri/ */ /* Get the node type represented by fd so we can deduce the target name */ nodetype = drmGetMinorType(maj, min); if (nodetype == -1) return (NULL); mname = drmGetMinorName(type); for (i = 0; i < SPECNAMELEN; i++) { if (isalpha(dname[i]) == 0 && dname[i] != '/') break; } if (dname[i] == '\0') return (NULL); id = (int)strtol(&dname[i], NULL, 10); id -= drmGetMinorBase(nodetype); snprintf(name, sizeof(name), DRM_DIR_NAME "/%s%d", mname, id + drmGetMinorBase(type)); return strdup(name); #else struct stat sbuf; char buf[PATH_MAX + 1]; const char *dev_name = drmGetDeviceName(type); unsigned int maj, min; int n; if (fstat(fd, &sbuf)) return NULL; maj = major(sbuf.st_rdev); min = minor(sbuf.st_rdev); if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode)) return NULL; if (!dev_name) return NULL; n = snprintf(buf, sizeof(buf), dev_name, DRM_DIR_NAME, min); if (n == -1 || n >= sizeof(buf)) return NULL; return strdup(buf); #endif } drm_public char *drmGetPrimaryDeviceNameFromFd(int fd) { return drmGetMinorNameForFD(fd, DRM_NODE_PRIMARY); } drm_public char *drmGetRenderDeviceNameFromFd(int fd) { return drmGetMinorNameForFD(fd, DRM_NODE_RENDER); } #ifdef __linux__ static char * DRM_PRINTFLIKE(2, 3) sysfs_uevent_get(const char *path, const char *fmt, ...) { char filename[PATH_MAX + 1], *key, *line = NULL, *value = NULL; size_t size = 0, len; ssize_t num; va_list ap; FILE *fp; va_start(ap, fmt); num = vasprintf(&key, fmt, ap); va_end(ap); len = num; snprintf(filename, sizeof(filename), "%s/uevent", path); fp = fopen(filename, "r"); if (!fp) { free(key); return NULL; } while ((num = getline(&line, &size, fp)) >= 0) { if ((strncmp(line, key, len) == 0) && (line[len] == '=')) { char *start = line + len + 1, *end = line + num - 1; if (*end != '\n') end++; value = strndup(start, end - start); break; } } free(line); fclose(fp); free(key); return value; } #endif /* Little white lie to avoid major rework of the existing code */ #define DRM_BUS_VIRTIO 0x10 #ifdef __linux__ static int get_subsystem_type(const char *device_path) { char path[PATH_MAX + 1] = ""; char link[PATH_MAX + 1] = ""; char *name; struct { const char *name; int bus_type; } bus_types[] = { { "/pci", DRM_BUS_PCI }, { "/usb", DRM_BUS_USB }, { "/platform", DRM_BUS_PLATFORM }, { "/spi", DRM_BUS_PLATFORM }, { "/host1x", DRM_BUS_HOST1X }, { "/virtio", DRM_BUS_VIRTIO }, }; strncpy(path, device_path, PATH_MAX); strncat(path, "/subsystem", PATH_MAX); if (readlink(path, link, PATH_MAX) < 0) return -errno; name = strrchr(link, '/'); if (!name) return -EINVAL; for (unsigned i = 0; i < ARRAY_SIZE(bus_types); i++) { if (strncmp(name, bus_types[i].name, strlen(bus_types[i].name)) == 0) return bus_types[i].bus_type; } return -EINVAL; } #endif static int drmParseSubsystemType(int maj, int min) { #ifdef __linux__ char path[PATH_MAX + 1] = ""; char real_path[PATH_MAX + 1] = ""; int subsystem_type; snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min); subsystem_type = get_subsystem_type(path); /* Try to get the parent (underlying) device type */ if (subsystem_type == DRM_BUS_VIRTIO) { /* Assume virtio-pci on error */ if (!realpath(path, real_path)) return DRM_BUS_VIRTIO; strncat(path, "/..", PATH_MAX); subsystem_type = get_subsystem_type(path); if (subsystem_type < 0) return DRM_BUS_VIRTIO; } return subsystem_type; #elif defined(__OpenBSD__) || defined(__DragonFly__) || defined(__FreeBSD__) return DRM_BUS_PCI; #else #warning "Missing implementation of drmParseSubsystemType" return -EINVAL; #endif } #ifdef __linux__ static void get_pci_path(int maj, int min, char *pci_path) { char path[PATH_MAX + 1], *term; snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min); if (!realpath(path, pci_path)) { strcpy(pci_path, path); return; } term = strrchr(pci_path, '/'); if (term && strncmp(term, "/virtio", 7) == 0) *term = 0; } #endif #ifdef __FreeBSD__ static int get_sysctl_pci_bus_info(int maj, int min, drmPciBusInfoPtr info) { char dname[SPECNAMELEN]; char sysctl_name[16]; char sysctl_val[256]; size_t sysctl_len; int id, type, nelem; unsigned int rdev, majmin, domain, bus, dev, func; rdev = makedev(maj, min); if (!devname_r(rdev, S_IFCHR, dname, sizeof(dname))) return -EINVAL; if (sscanf(dname, "drm/%d\n", &id) != 1) return -EINVAL; type = drmGetMinorType(maj, min); if (type == -1) return -EINVAL; /* BUG: This above section is iffy, since it mandates that a driver will * create both card and render node. * If it does not, the next DRM device will create card#X and * renderD#(128+X)-1. * This is a possibility in FreeBSD but for now there is no good way for * obtaining the info. */ switch (type) { case DRM_NODE_PRIMARY: break; case DRM_NODE_CONTROL: id -= 64; break; case DRM_NODE_RENDER: id -= 128; break; } if (id < 0) return -EINVAL; if (snprintf(sysctl_name, sizeof(sysctl_name), "hw.dri.%d.busid", id) <= 0) return -EINVAL; sysctl_len = sizeof(sysctl_val); if (sysctlbyname(sysctl_name, sysctl_val, &sysctl_len, NULL, 0)) return -EINVAL; #define bus_fmt "pci:%04x:%02x:%02x.%u" nelem = sscanf(sysctl_val, bus_fmt, &domain, &bus, &dev, &func); if (nelem != 4) return -EINVAL; info->domain = domain; info->bus = bus; info->dev = dev; info->func = func; return 0; } #endif static int drmParsePciBusInfo(int maj, int min, drmPciBusInfoPtr info) { #ifdef __linux__ unsigned int domain, bus, dev, func; char pci_path[PATH_MAX + 1], *value; int num; get_pci_path(maj, min, pci_path); value = sysfs_uevent_get(pci_path, "PCI_SLOT_NAME"); if (!value) return -ENOENT; num = sscanf(value, "%04x:%02x:%02x.%1u", &domain, &bus, &dev, &func); free(value); if (num != 4) return -EINVAL; info->domain = domain; info->bus = bus; info->dev = dev; info->func = func; return 0; #elif defined(__OpenBSD__) || defined(__DragonFly__) struct drm_pciinfo pinfo; int fd, type; type = drmGetMinorType(maj, min); if (type == -1) return -ENODEV; fd = drmOpenMinor(min, 0, type); if (fd < 0) return -errno; if (drmIoctl(fd, DRM_IOCTL_GET_PCIINFO, &pinfo)) { close(fd); return -errno; } close(fd); info->domain = pinfo.domain; info->bus = pinfo.bus; info->dev = pinfo.dev; info->func = pinfo.func; return 0; #elif defined(__FreeBSD__) return get_sysctl_pci_bus_info(maj, min, info); #else #warning "Missing implementation of drmParsePciBusInfo" return -EINVAL; #endif } drm_public int drmDevicesEqual(drmDevicePtr a, drmDevicePtr b) { if (a == NULL || b == NULL) return 0; if (a->bustype != b->bustype) return 0; switch (a->bustype) { case DRM_BUS_PCI: return memcmp(a->businfo.pci, b->businfo.pci, sizeof(drmPciBusInfo)) == 0; case DRM_BUS_USB: return memcmp(a->businfo.usb, b->businfo.usb, sizeof(drmUsbBusInfo)) == 0; case DRM_BUS_PLATFORM: return memcmp(a->businfo.platform, b->businfo.platform, sizeof(drmPlatformBusInfo)) == 0; case DRM_BUS_HOST1X: return memcmp(a->businfo.host1x, b->businfo.host1x, sizeof(drmHost1xBusInfo)) == 0; default: break; } return 0; } static int drmGetNodeType(const char *name) { if (strncmp(name, DRM_CONTROL_MINOR_NAME, sizeof(DRM_CONTROL_MINOR_NAME ) - 1) == 0) return DRM_NODE_CONTROL; if (strncmp(name, DRM_RENDER_MINOR_NAME, sizeof(DRM_RENDER_MINOR_NAME) - 1) == 0) return DRM_NODE_RENDER; if (strncmp(name, DRM_PRIMARY_MINOR_NAME, sizeof(DRM_PRIMARY_MINOR_NAME) - 1) == 0) return DRM_NODE_PRIMARY; return -EINVAL; } static int drmGetMaxNodeName(void) { return sizeof(DRM_DIR_NAME) + MAX3(sizeof(DRM_PRIMARY_MINOR_NAME), sizeof(DRM_CONTROL_MINOR_NAME), sizeof(DRM_RENDER_MINOR_NAME)) + 3 /* length of the node number */; } #ifdef __linux__ static int parse_separate_sysfs_files(int maj, int min, drmPciDeviceInfoPtr device, bool ignore_revision) { static const char *attrs[] = { "revision", /* Older kernels are missing the file, so check for it first */ "vendor", "device", "subsystem_vendor", "subsystem_device", }; char path[PATH_MAX + 1], pci_path[PATH_MAX + 1]; unsigned int data[ARRAY_SIZE(attrs)]; FILE *fp; int ret; get_pci_path(maj, min, pci_path); for (unsigned i = ignore_revision ? 1 : 0; i < ARRAY_SIZE(attrs); i++) { snprintf(path, PATH_MAX, "%s/%s", pci_path, attrs[i]); fp = fopen(path, "r"); if (!fp) return -errno; ret = fscanf(fp, "%x", &data[i]); fclose(fp); if (ret != 1) return -errno; } device->revision_id = ignore_revision ? 0xff : data[0] & 0xff; device->vendor_id = data[1] & 0xffff; device->device_id = data[2] & 0xffff; device->subvendor_id = data[3] & 0xffff; device->subdevice_id = data[4] & 0xffff; return 0; } static int parse_config_sysfs_file(int maj, int min, drmPciDeviceInfoPtr device) { char path[PATH_MAX + 1], pci_path[PATH_MAX + 1]; unsigned char config[64]; int fd, ret; get_pci_path(maj, min, pci_path); snprintf(path, PATH_MAX, "%s/config", pci_path); fd = open(path, O_RDONLY); if (fd < 0) return -errno; ret = read(fd, config, sizeof(config)); close(fd); if (ret < 0) return -errno; device->vendor_id = config[0] | (config[1] << 8); device->device_id = config[2] | (config[3] << 8); device->revision_id = config[8]; device->subvendor_id = config[44] | (config[45] << 8); device->subdevice_id = config[46] | (config[47] << 8); return 0; } #endif static int drmParsePciDeviceInfo(int maj, int min, drmPciDeviceInfoPtr device, uint32_t flags) { #ifdef __linux__ if (!(flags & DRM_DEVICE_GET_PCI_REVISION)) return parse_separate_sysfs_files(maj, min, device, true); if (parse_separate_sysfs_files(maj, min, device, false)) return parse_config_sysfs_file(maj, min, device); return 0; #elif defined(__OpenBSD__) || defined(__DragonFly__) struct drm_pciinfo pinfo; int fd, type; type = drmGetMinorType(maj, min); if (type == -1) return -ENODEV; fd = drmOpenMinor(min, 0, type); if (fd < 0) return -errno; if (drmIoctl(fd, DRM_IOCTL_GET_PCIINFO, &pinfo)) { close(fd); return -errno; } close(fd); device->vendor_id = pinfo.vendor_id; device->device_id = pinfo.device_id; device->revision_id = pinfo.revision_id; device->subvendor_id = pinfo.subvendor_id; device->subdevice_id = pinfo.subdevice_id; return 0; #elif defined(__FreeBSD__) drmPciBusInfo info; struct pci_conf_io pc; struct pci_match_conf patterns[1]; struct pci_conf results[1]; int fd, error; if (get_sysctl_pci_bus_info(maj, min, &info) != 0) return -EINVAL; fd = open("/dev/pci", O_RDONLY, 0); if (fd < 0) return -errno; bzero(&patterns, sizeof(patterns)); patterns[0].pc_sel.pc_domain = info.domain; patterns[0].pc_sel.pc_bus = info.bus; patterns[0].pc_sel.pc_dev = info.dev; patterns[0].pc_sel.pc_func = info.func; patterns[0].flags = PCI_GETCONF_MATCH_DOMAIN | PCI_GETCONF_MATCH_BUS | PCI_GETCONF_MATCH_DEV | PCI_GETCONF_MATCH_FUNC; bzero(&pc, sizeof(struct pci_conf_io)); pc.num_patterns = 1; pc.pat_buf_len = sizeof(patterns); pc.patterns = patterns; pc.match_buf_len = sizeof(results); pc.matches = results; if (ioctl(fd, PCIOCGETCONF, &pc) || pc.status == PCI_GETCONF_ERROR) { error = errno; close(fd); return -error; } close(fd); device->vendor_id = results[0].pc_vendor; device->device_id = results[0].pc_device; device->subvendor_id = results[0].pc_subvendor; device->subdevice_id = results[0].pc_subdevice; device->revision_id = results[0].pc_revid; return 0; #else #warning "Missing implementation of drmParsePciDeviceInfo" return -EINVAL; #endif } static void drmFreePlatformDevice(drmDevicePtr device) { if (device->deviceinfo.platform) { if (device->deviceinfo.platform->compatible) { char **compatible = device->deviceinfo.platform->compatible; while (*compatible) { free(*compatible); compatible++; } free(device->deviceinfo.platform->compatible); } } } static void drmFreeHost1xDevice(drmDevicePtr device) { if (device->deviceinfo.host1x) { if (device->deviceinfo.host1x->compatible) { char **compatible = device->deviceinfo.host1x->compatible; while (*compatible) { free(*compatible); compatible++; } free(device->deviceinfo.host1x->compatible); } } } drm_public void drmFreeDevice(drmDevicePtr *device) { if (device == NULL) return; if (*device) { switch ((*device)->bustype) { case DRM_BUS_PLATFORM: drmFreePlatformDevice(*device); break; case DRM_BUS_HOST1X: drmFreeHost1xDevice(*device); break; } } free(*device); *device = NULL; } drm_public void drmFreeDevices(drmDevicePtr devices[], int count) { int i; if (devices == NULL) return; for (i = 0; i < count; i++) if (devices[i]) drmFreeDevice(&devices[i]); } static drmDevicePtr drmDeviceAlloc(unsigned int type, const char *node, size_t bus_size, size_t device_size, char **ptrp) { size_t max_node_length, extra, size; drmDevicePtr device; unsigned int i; char *ptr; max_node_length = ALIGN(drmGetMaxNodeName(), sizeof(void *)); extra = DRM_NODE_MAX * (sizeof(void *) + max_node_length); size = sizeof(*device) + extra + bus_size + device_size; device = calloc(1, size); if (!device) return NULL; device->available_nodes = 1 << type; ptr = (char *)device + sizeof(*device); device->nodes = (char **)ptr; ptr += DRM_NODE_MAX * sizeof(void *); for (i = 0; i < DRM_NODE_MAX; i++) { device->nodes[i] = ptr; ptr += max_node_length; } memcpy(device->nodes[type], node, max_node_length); *ptrp = ptr; return device; } static int drmProcessPciDevice(drmDevicePtr *device, const char *node, int node_type, int maj, int min, bool fetch_deviceinfo, uint32_t flags) { drmDevicePtr dev; char *addr; int ret; dev = drmDeviceAlloc(node_type, node, sizeof(drmPciBusInfo), sizeof(drmPciDeviceInfo), &addr); if (!dev) return -ENOMEM; dev->bustype = DRM_BUS_PCI; dev->businfo.pci = (drmPciBusInfoPtr)addr; ret = drmParsePciBusInfo(maj, min, dev->businfo.pci); if (ret) goto free_device; // Fetch the device info if the user has requested it if (fetch_deviceinfo) { addr += sizeof(drmPciBusInfo); dev->deviceinfo.pci = (drmPciDeviceInfoPtr)addr; ret = drmParsePciDeviceInfo(maj, min, dev->deviceinfo.pci, flags); if (ret) goto free_device; } *device = dev; return 0; free_device: free(dev); return ret; } #ifdef __linux__ static int drm_usb_dev_path(int maj, int min, char *path, size_t len) { char *value, *tmp_path, *slash; bool usb_device, usb_interface; snprintf(path, len, "/sys/dev/char/%d:%d/device", maj, min); value = sysfs_uevent_get(path, "DEVTYPE"); if (!value) return -ENOENT; usb_device = strcmp(value, "usb_device") == 0; usb_interface = strcmp(value, "usb_interface") == 0; free(value); if (usb_device) return 0; if (!usb_interface) return -ENOTSUP; /* The parent of a usb_interface is a usb_device */ tmp_path = realpath(path, NULL); if (!tmp_path) return -errno; slash = strrchr(tmp_path, '/'); if (!slash) { free(tmp_path); return -EINVAL; } *slash = '\0'; if (snprintf(path, len, "%s", tmp_path) >= (int)len) { free(tmp_path); return -EINVAL; } free(tmp_path); return 0; } #endif static int drmParseUsbBusInfo(int maj, int min, drmUsbBusInfoPtr info) { #ifdef __linux__ char path[PATH_MAX + 1], *value; unsigned int bus, dev; int ret; ret = drm_usb_dev_path(maj, min, path, sizeof(path)); if (ret < 0) return ret; value = sysfs_uevent_get(path, "BUSNUM"); if (!value) return -ENOENT; ret = sscanf(value, "%03u", &bus); free(value); if (ret <= 0) return -errno; value = sysfs_uevent_get(path, "DEVNUM"); if (!value) return -ENOENT; ret = sscanf(value, "%03u", &dev); free(value); if (ret <= 0) return -errno; info->bus = bus; info->dev = dev; return 0; #else #warning "Missing implementation of drmParseUsbBusInfo" return -EINVAL; #endif } static int drmParseUsbDeviceInfo(int maj, int min, drmUsbDeviceInfoPtr info) { #ifdef __linux__ char path[PATH_MAX + 1], *value; unsigned int vendor, product; int ret; ret = drm_usb_dev_path(maj, min, path, sizeof(path)); if (ret < 0) return ret; value = sysfs_uevent_get(path, "PRODUCT"); if (!value) return -ENOENT; ret = sscanf(value, "%x/%x", &vendor, &product); free(value); if (ret <= 0) return -errno; info->vendor = vendor; info->product = product; return 0; #else #warning "Missing implementation of drmParseUsbDeviceInfo" return -EINVAL; #endif } static int drmProcessUsbDevice(drmDevicePtr *device, const char *node, int node_type, int maj, int min, bool fetch_deviceinfo, uint32_t flags) { drmDevicePtr dev; char *ptr; int ret; dev = drmDeviceAlloc(node_type, node, sizeof(drmUsbBusInfo), sizeof(drmUsbDeviceInfo), &ptr); if (!dev) return -ENOMEM; dev->bustype = DRM_BUS_USB; dev->businfo.usb = (drmUsbBusInfoPtr)ptr; ret = drmParseUsbBusInfo(maj, min, dev->businfo.usb); if (ret < 0) goto free_device; if (fetch_deviceinfo) { ptr += sizeof(drmUsbBusInfo); dev->deviceinfo.usb = (drmUsbDeviceInfoPtr)ptr; ret = drmParseUsbDeviceInfo(maj, min, dev->deviceinfo.usb); if (ret < 0) goto free_device; } *device = dev; return 0; free_device: free(dev); return ret; } static int drmParseOFBusInfo(int maj, int min, char *fullname) { #ifdef __linux__ char path[PATH_MAX + 1], *name, *tmp_name; snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min); name = sysfs_uevent_get(path, "OF_FULLNAME"); tmp_name = name; if (!name) { /* If the device lacks OF data, pick the MODALIAS info */ name = sysfs_uevent_get(path, "MODALIAS"); if (!name) return -ENOENT; /* .. and strip the MODALIAS=[platform,usb...]: part. */ tmp_name = strrchr(name, ':'); if (!tmp_name) { free(name); return -ENOENT; } tmp_name++; } strncpy(fullname, tmp_name, DRM_PLATFORM_DEVICE_NAME_LEN); fullname[DRM_PLATFORM_DEVICE_NAME_LEN - 1] = '\0'; free(name); return 0; #else #warning "Missing implementation of drmParseOFBusInfo" return -EINVAL; #endif } static int drmParseOFDeviceInfo(int maj, int min, char ***compatible) { #ifdef __linux__ char path[PATH_MAX + 1], *value, *tmp_name; unsigned int count, i; int err; snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min); value = sysfs_uevent_get(path, "OF_COMPATIBLE_N"); if (value) { sscanf(value, "%u", &count); free(value); } else { /* Assume one entry if the device lack OF data */ count = 1; } *compatible = calloc(count + 1, sizeof(char *)); if (!*compatible) return -ENOMEM; for (i = 0; i < count; i++) { value = sysfs_uevent_get(path, "OF_COMPATIBLE_%u", i); tmp_name = value; if (!value) { /* If the device lacks OF data, pick the MODALIAS info */ value = sysfs_uevent_get(path, "MODALIAS"); if (!value) { err = -ENOENT; goto free; } /* .. and strip the MODALIAS=[platform,usb...]: part. */ tmp_name = strrchr(value, ':'); if (!tmp_name) { free(value); return -ENOENT; } tmp_name = strdup(tmp_name + 1); free(value); } (*compatible)[i] = tmp_name; } return 0; free: while (i--) free((*compatible)[i]); free(*compatible); return err; #else #warning "Missing implementation of drmParseOFDeviceInfo" return -EINVAL; #endif } static int drmProcessPlatformDevice(drmDevicePtr *device, const char *node, int node_type, int maj, int min, bool fetch_deviceinfo, uint32_t flags) { drmDevicePtr dev; char *ptr; int ret; dev = drmDeviceAlloc(node_type, node, sizeof(drmPlatformBusInfo), sizeof(drmPlatformDeviceInfo), &ptr); if (!dev) return -ENOMEM; dev->bustype = DRM_BUS_PLATFORM; dev->businfo.platform = (drmPlatformBusInfoPtr)ptr; ret = drmParseOFBusInfo(maj, min, dev->businfo.platform->fullname); if (ret < 0) goto free_device; if (fetch_deviceinfo) { ptr += sizeof(drmPlatformBusInfo); dev->deviceinfo.platform = (drmPlatformDeviceInfoPtr)ptr; ret = drmParseOFDeviceInfo(maj, min, &dev->deviceinfo.platform->compatible); if (ret < 0) goto free_device; } *device = dev; return 0; free_device: free(dev); return ret; } static int drmProcessHost1xDevice(drmDevicePtr *device, const char *node, int node_type, int maj, int min, bool fetch_deviceinfo, uint32_t flags) { drmDevicePtr dev; char *ptr; int ret; dev = drmDeviceAlloc(node_type, node, sizeof(drmHost1xBusInfo), sizeof(drmHost1xDeviceInfo), &ptr); if (!dev) return -ENOMEM; dev->bustype = DRM_BUS_HOST1X; dev->businfo.host1x = (drmHost1xBusInfoPtr)ptr; ret = drmParseOFBusInfo(maj, min, dev->businfo.host1x->fullname); if (ret < 0) goto free_device; if (fetch_deviceinfo) { ptr += sizeof(drmHost1xBusInfo); dev->deviceinfo.host1x = (drmHost1xDeviceInfoPtr)ptr; ret = drmParseOFDeviceInfo(maj, min, &dev->deviceinfo.host1x->compatible); if (ret < 0) goto free_device; } *device = dev; return 0; free_device: free(dev); return ret; } static int process_device(drmDevicePtr *device, const char *d_name, int req_subsystem_type, bool fetch_deviceinfo, uint32_t flags) { struct stat sbuf; char node[PATH_MAX + 1]; int node_type, subsystem_type; unsigned int maj, min; node_type = drmGetNodeType(d_name); if (node_type < 0) return -1; snprintf(node, PATH_MAX, "%s/%s", DRM_DIR_NAME, d_name); if (stat(node, &sbuf)) return -1; maj = major(sbuf.st_rdev); min = minor(sbuf.st_rdev); if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode)) return -1; subsystem_type = drmParseSubsystemType(maj, min); if (req_subsystem_type != -1 && req_subsystem_type != subsystem_type) return -1; switch (subsystem_type) { case DRM_BUS_PCI: case DRM_BUS_VIRTIO: return drmProcessPciDevice(device, node, node_type, maj, min, fetch_deviceinfo, flags); case DRM_BUS_USB: return drmProcessUsbDevice(device, node, node_type, maj, min, fetch_deviceinfo, flags); case DRM_BUS_PLATFORM: return drmProcessPlatformDevice(device, node, node_type, maj, min, fetch_deviceinfo, flags); case DRM_BUS_HOST1X: return drmProcessHost1xDevice(device, node, node_type, maj, min, fetch_deviceinfo, flags); default: return -1; } } /* Consider devices located on the same bus as duplicate and fold the respective * entries into a single one. * * Note: this leaves "gaps" in the array, while preserving the length. */ static void drmFoldDuplicatedDevices(drmDevicePtr local_devices[], int count) { int node_type, i, j; for (i = 0; i < count; i++) { for (j = i + 1; j < count; j++) { if (drmDevicesEqual(local_devices[i], local_devices[j])) { local_devices[i]->available_nodes |= local_devices[j]->available_nodes; node_type = log2_int(local_devices[j]->available_nodes); memcpy(local_devices[i]->nodes[node_type], local_devices[j]->nodes[node_type], drmGetMaxNodeName()); drmFreeDevice(&local_devices[j]); } } } } /* Check that the given flags are valid returning 0 on success */ static int drm_device_validate_flags(uint32_t flags) { return (flags & ~DRM_DEVICE_GET_PCI_REVISION); } static bool drm_device_has_rdev(drmDevicePtr device, dev_t find_rdev) { struct stat sbuf; for (int i = 0; i < DRM_NODE_MAX; i++) { if (device->available_nodes & 1 << i) { if (stat(device->nodes[i], &sbuf) == 0 && sbuf.st_rdev == find_rdev) return true; } } return false; } /* * The kernel drm core has a number of places that assume maximum of * 3x64 devices nodes. That's 64 for each of primary, control and * render nodes. Rounded it up to 256 for simplicity. */ #define MAX_DRM_NODES 256 /** * Get information about the opened drm device * * \param fd file descriptor of the drm device * \param flags feature/behaviour bitmask * \param device the address of a drmDevicePtr where the information * will be allocated in stored * * \return zero on success, negative error code otherwise. * * \note Unlike drmGetDevice it does not retrieve the pci device revision field * unless the DRM_DEVICE_GET_PCI_REVISION \p flag is set. */ drm_public int drmGetDevice2(int fd, uint32_t flags, drmDevicePtr *device) { #ifdef __OpenBSD__ /* * DRI device nodes on OpenBSD are not in their own directory, they reside * in /dev along with a large number of statically generated /dev nodes. * Avoid stat'ing all of /dev needlessly by implementing this custom path. */ drmDevicePtr d; struct stat sbuf; char node[PATH_MAX + 1]; const char *dev_name; int node_type, subsystem_type; int maj, min, n, ret; if (fd == -1 || device == NULL) return -EINVAL; if (fstat(fd, &sbuf)) return -errno; maj = major(sbuf.st_rdev); min = minor(sbuf.st_rdev); if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode)) return -EINVAL; node_type = drmGetMinorType(maj, min); if (node_type == -1) return -ENODEV; dev_name = drmGetDeviceName(node_type); if (!dev_name) return -EINVAL; n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min); if (n == -1 || n >= PATH_MAX) return -errno; if (stat(node, &sbuf)) return -EINVAL; subsystem_type = drmParseSubsystemType(maj, min); if (subsystem_type != DRM_BUS_PCI) return -ENODEV; ret = drmProcessPciDevice(&d, node, node_type, maj, min, true, flags); if (ret) return ret; *device = d; return 0; #else drmDevicePtr local_devices[MAX_DRM_NODES]; drmDevicePtr d; DIR *sysdir; struct dirent *dent; struct stat sbuf; int subsystem_type; int maj, min; int ret, i, node_count; dev_t find_rdev; if (drm_device_validate_flags(flags)) return -EINVAL; if (fd == -1 || device == NULL) return -EINVAL; if (fstat(fd, &sbuf)) return -errno; find_rdev = sbuf.st_rdev; maj = major(sbuf.st_rdev); min = minor(sbuf.st_rdev); if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode)) return -EINVAL; subsystem_type = drmParseSubsystemType(maj, min); if (subsystem_type < 0) return subsystem_type; sysdir = opendir(DRM_DIR_NAME); if (!sysdir) return -errno; i = 0; while ((dent = readdir(sysdir))) { ret = process_device(&d, dent->d_name, subsystem_type, true, flags); if (ret) continue; if (i >= MAX_DRM_NODES) { fprintf(stderr, "More than %d drm nodes detected. " "Please report a bug - that should not happen.\n" "Skipping extra nodes\n", MAX_DRM_NODES); break; } local_devices[i] = d; i++; } node_count = i; drmFoldDuplicatedDevices(local_devices, node_count); *device = NULL; for (i = 0; i < node_count; i++) { if (!local_devices[i]) continue; if (drm_device_has_rdev(local_devices[i], find_rdev)) *device = local_devices[i]; else drmFreeDevice(&local_devices[i]); } closedir(sysdir); if (*device == NULL) return -ENODEV; return 0; #endif } /** * Get information about the opened drm device * * \param fd file descriptor of the drm device * \param device the address of a drmDevicePtr where the information * will be allocated in stored * * \return zero on success, negative error code otherwise. */ drm_public int drmGetDevice(int fd, drmDevicePtr *device) { return drmGetDevice2(fd, DRM_DEVICE_GET_PCI_REVISION, device); } /** * Get drm devices on the system * * \param flags feature/behaviour bitmask * \param devices the array of devices with drmDevicePtr elements * can be NULL to get the device number first * \param max_devices the maximum number of devices for the array * * \return on error - negative error code, * if devices is NULL - total number of devices available on the system, * alternatively the number of devices stored in devices[], which is * capped by the max_devices. * * \note Unlike drmGetDevices it does not retrieve the pci device revision field * unless the DRM_DEVICE_GET_PCI_REVISION \p flag is set. */ drm_public int drmGetDevices2(uint32_t flags, drmDevicePtr devices[], int max_devices) { drmDevicePtr local_devices[MAX_DRM_NODES]; drmDevicePtr device; DIR *sysdir; struct dirent *dent; int ret, i, node_count, device_count; if (drm_device_validate_flags(flags)) return -EINVAL; sysdir = opendir(DRM_DIR_NAME); if (!sysdir) return -errno; i = 0; while ((dent = readdir(sysdir))) { ret = process_device(&device, dent->d_name, -1, devices != NULL, flags); if (ret) continue; if (i >= MAX_DRM_NODES) { fprintf(stderr, "More than %d drm nodes detected. " "Please report a bug - that should not happen.\n" "Skipping extra nodes\n", MAX_DRM_NODES); break; } local_devices[i] = device; i++; } node_count = i; drmFoldDuplicatedDevices(local_devices, node_count); device_count = 0; for (i = 0; i < node_count; i++) { if (!local_devices[i]) continue; if ((devices != NULL) && (device_count < max_devices)) devices[device_count] = local_devices[i]; else drmFreeDevice(&local_devices[i]); device_count++; } closedir(sysdir); if (devices != NULL) return MIN2(device_count, max_devices); return device_count; } /** * Get drm devices on the system * * \param devices the array of devices with drmDevicePtr elements * can be NULL to get the device number first * \param max_devices the maximum number of devices for the array * * \return on error - negative error code, * if devices is NULL - total number of devices available on the system, * alternatively the number of devices stored in devices[], which is * capped by the max_devices. */ drm_public int drmGetDevices(drmDevicePtr devices[], int max_devices) { return drmGetDevices2(DRM_DEVICE_GET_PCI_REVISION, devices, max_devices); } drm_public char *drmGetDeviceNameFromFd2(int fd) { #ifdef __linux__ struct stat sbuf; char path[PATH_MAX + 1], *value; unsigned int maj, min; if (fstat(fd, &sbuf)) return NULL; maj = major(sbuf.st_rdev); min = minor(sbuf.st_rdev); if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode)) return NULL; snprintf(path, sizeof(path), "/sys/dev/char/%d:%d", maj, min); value = sysfs_uevent_get(path, "DEVNAME"); if (!value) return NULL; snprintf(path, sizeof(path), "/dev/%s", value); free(value); return strdup(path); #elif defined(__FreeBSD__) return drmGetDeviceNameFromFd(fd); #else struct stat sbuf; char node[PATH_MAX + 1]; const char *dev_name; int node_type; int maj, min, n; if (fstat(fd, &sbuf)) return NULL; maj = major(sbuf.st_rdev); min = minor(sbuf.st_rdev); if (!drmNodeIsDRM(maj, min) || !S_ISCHR(sbuf.st_mode)) return NULL; node_type = drmGetMinorType(maj, min); if (node_type == -1) return NULL; dev_name = drmGetDeviceName(node_type); if (!dev_name) return NULL; n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min); if (n == -1 || n >= PATH_MAX) return NULL; return strdup(node); #endif } drm_public int drmSyncobjCreate(int fd, uint32_t flags, uint32_t *handle) { struct drm_syncobj_create args; int ret; memclear(args); args.flags = flags; args.handle = 0; ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_CREATE, &args); if (ret) return ret; *handle = args.handle; return 0; } drm_public int drmSyncobjDestroy(int fd, uint32_t handle) { struct drm_syncobj_destroy args; memclear(args); args.handle = handle; return drmIoctl(fd, DRM_IOCTL_SYNCOBJ_DESTROY, &args); } drm_public int drmSyncobjHandleToFD(int fd, uint32_t handle, int *obj_fd) { struct drm_syncobj_handle args; int ret; memclear(args); args.fd = -1; args.handle = handle; ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD, &args); if (ret) return ret; *obj_fd = args.fd; return 0; } drm_public int drmSyncobjFDToHandle(int fd, int obj_fd, uint32_t *handle) { struct drm_syncobj_handle args; int ret; memclear(args); args.fd = obj_fd; args.handle = 0; ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE, &args); if (ret) return ret; *handle = args.handle; return 0; } drm_public int drmSyncobjImportSyncFile(int fd, uint32_t handle, int sync_file_fd) { struct drm_syncobj_handle args; memclear(args); args.fd = sync_file_fd; args.handle = handle; args.flags = DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE; return drmIoctl(fd, DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE, &args); } drm_public int drmSyncobjExportSyncFile(int fd, uint32_t handle, int *sync_file_fd) { struct drm_syncobj_handle args; int ret; memclear(args); args.fd = -1; args.handle = handle; args.flags = DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE; ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD, &args); if (ret) return ret; *sync_file_fd = args.fd; return 0; } drm_public int drmSyncobjWait(int fd, uint32_t *handles, unsigned num_handles, int64_t timeout_nsec, unsigned flags, uint32_t *first_signaled) { struct drm_syncobj_wait args; int ret; memclear(args); args.handles = (uintptr_t)handles; args.timeout_nsec = timeout_nsec; args.count_handles = num_handles; args.flags = flags; ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_WAIT, &args); if (ret < 0) return -errno; if (first_signaled) *first_signaled = args.first_signaled; return ret; } drm_public int drmSyncobjReset(int fd, const uint32_t *handles, uint32_t handle_count) { struct drm_syncobj_array args; int ret; memclear(args); args.handles = (uintptr_t)handles; args.count_handles = handle_count; ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_RESET, &args); return ret; } drm_public int drmSyncobjSignal(int fd, const uint32_t *handles, uint32_t handle_count) { struct drm_syncobj_array args; int ret; memclear(args); args.handles = (uintptr_t)handles; args.count_handles = handle_count; ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_SIGNAL, &args); return ret; } drm_public int drmSyncobjTimelineSignal(int fd, const uint32_t *handles, uint64_t *points, uint32_t handle_count) { struct drm_syncobj_timeline_array args; int ret; memclear(args); args.handles = (uintptr_t)handles; args.points = (uintptr_t)points; args.count_handles = handle_count; ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL, &args); return ret; } drm_public int drmSyncobjTimelineWait(int fd, uint32_t *handles, uint64_t *points, unsigned num_handles, int64_t timeout_nsec, unsigned flags, uint32_t *first_signaled) { struct drm_syncobj_timeline_wait args; int ret; memclear(args); args.handles = (uintptr_t)handles; args.points = (uintptr_t)points; args.timeout_nsec = timeout_nsec; args.count_handles = num_handles; args.flags = flags; ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT, &args); if (ret < 0) return -errno; if (first_signaled) *first_signaled = args.first_signaled; return ret; } drm_public int drmSyncobjQuery(int fd, uint32_t *handles, uint64_t *points, uint32_t handle_count) { struct drm_syncobj_timeline_array args; int ret; memclear(args); args.handles = (uintptr_t)handles; args.points = (uintptr_t)points; args.count_handles = handle_count; ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_QUERY, &args); if (ret) return ret; return 0; } drm_public int drmSyncobjQuery2(int fd, uint32_t *handles, uint64_t *points, uint32_t handle_count, uint32_t flags) { struct drm_syncobj_timeline_array args; memclear(args); args.handles = (uintptr_t)handles; args.points = (uintptr_t)points; args.count_handles = handle_count; args.flags = flags; return drmIoctl(fd, DRM_IOCTL_SYNCOBJ_QUERY, &args); } drm_public int drmSyncobjTransfer(int fd, uint32_t dst_handle, uint64_t dst_point, uint32_t src_handle, uint64_t src_point, uint32_t flags) { struct drm_syncobj_transfer args; int ret; memclear(args); args.src_handle = src_handle; args.dst_handle = dst_handle; args.src_point = src_point; args.dst_point = dst_point; args.flags = flags; ret = drmIoctl(fd, DRM_IOCTL_SYNCOBJ_TRANSFER, &args); return ret; } static char * drmGetFormatModifierFromSimpleTokens(uint64_t modifier) { unsigned int i; for (i = 0; i < ARRAY_SIZE(drm_format_modifier_table); i++) { if (drm_format_modifier_table[i].modifier == modifier) return strdup(drm_format_modifier_table[i].modifier_name); } return NULL; } /** Retrieves a human-readable representation of a vendor (as a string) from * the format token modifier * * \param modifier the format modifier token * \return a char pointer to the human-readable form of the vendor. Caller is * responsible for freeing it. */ drm_public char * drmGetFormatModifierVendor(uint64_t modifier) { unsigned int i; uint8_t vendor = fourcc_mod_get_vendor(modifier); for (i = 0; i < ARRAY_SIZE(drm_format_modifier_vendor_table); i++) { if (drm_format_modifier_vendor_table[i].vendor == vendor) return strdup(drm_format_modifier_vendor_table[i].vendor_name); } return NULL; } /** Retrieves a human-readable representation string from a format token * modifier * * If the dedicated function was not able to extract a valid name or searching * the format modifier was not in the table, this function would return NULL. * * \param modifier the token format * \return a malloc'ed string representation of the modifier. Caller is * responsible for freeing the string returned. * */ drm_public char * drmGetFormatModifierName(uint64_t modifier) { uint8_t vendorid = fourcc_mod_get_vendor(modifier); char *modifier_found = NULL; unsigned int i; for (i = 0; i < ARRAY_SIZE(modifier_format_vendor_table); i++) { if (modifier_format_vendor_table[i].vendor == vendorid) modifier_found = modifier_format_vendor_table[i].vendor_cb(modifier); } if (!modifier_found) return drmGetFormatModifierFromSimpleTokens(modifier); return modifier_found; }