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-rw-r--r--xf86drm.c5148
1 files changed, 5148 insertions, 0 deletions
diff --git a/xf86drm.c b/xf86drm.c
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index 0000000..0faa597
--- /dev/null
+++ b/xf86drm.c
@@ -0,0 +1,5148 @@
+/**
+ * \file xf86drm.c
+ * User-level interface to DRM device
+ *
+ * \author Rickard E. (Rik) Faith <faith@valinux.com>
+ * \author Kevin E. Martin <martin@valinux.com>
+ */
+
+/*
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <string.h>
+#include <strings.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <stddef.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <limits.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#define stat_t struct stat
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <stdarg.h>
+#ifdef MAJOR_IN_MKDEV
+#include <sys/mkdev.h>
+#endif
+#ifdef MAJOR_IN_SYSMACROS
+#include <sys/sysmacros.h>
+#endif
+#if HAVE_SYS_SYSCTL_H
+#include <sys/sysctl.h>
+#endif
+#include <math.h>
+#include <inttypes.h>
+
+#if defined(__FreeBSD__)
+#include <sys/param.h>
+#include <sys/pciio.h>
+#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 bool
+drmGetAfbcFormatModifierNameFromArm(uint64_t modifier, FILE *fp)
+{
+ uint64_t mode_value = modifier & AFBC_FORMAT_MOD_MODE_VALUE_MASK;
+ uint64_t block_size = mode_value & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK;
+
+ const char *block = NULL;
+ const char *mode = NULL;
+ bool did_print_mode = false;
+
+ /* 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) {
+ return false;
+ }
+
+ fprintf(fp, "BLOCK_SIZE=%s,", block);
+
+ /* add mode */
+ for (unsigned int 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);
+ }
+ }
+ }
+
+ return true;
+}
+
+static bool
+drmGetAfrcFormatModifierNameFromArm(uint64_t modifier, FILE *fp)
+{
+ bool scan_layout;
+ for (unsigned int i = 0; i < 2; ++i) {
+ uint64_t coding_unit_block =
+ (modifier >> (i * 4)) & AFRC_FORMAT_MOD_CU_SIZE_MASK;
+ const char *coding_unit_size = NULL;
+
+ switch (coding_unit_block) {
+ case AFRC_FORMAT_MOD_CU_SIZE_16:
+ coding_unit_size = "CU_16";
+ break;
+ case AFRC_FORMAT_MOD_CU_SIZE_24:
+ coding_unit_size = "CU_24";
+ break;
+ case AFRC_FORMAT_MOD_CU_SIZE_32:
+ coding_unit_size = "CU_32";
+ break;
+ }
+
+ if (!coding_unit_size) {
+ if (i == 0) {
+ return false;
+ }
+ break;
+ }
+
+ if (i == 0) {
+ fprintf(fp, "P0=%s,", coding_unit_size);
+ } else {
+ fprintf(fp, "P12=%s,", coding_unit_size);
+ }
+ }
+
+ scan_layout =
+ (modifier & AFRC_FORMAT_MOD_LAYOUT_SCAN) == AFRC_FORMAT_MOD_LAYOUT_SCAN;
+ if (scan_layout) {
+ fprintf(fp, "SCAN");
+ } else {
+ fprintf(fp, "ROT");
+ }
+ return true;
+}
+
+static char *
+drmGetFormatModifierNameFromArm(uint64_t modifier)
+{
+ uint64_t type = (modifier >> 52) & 0xf;
+
+ FILE *fp;
+ size_t size = 0;
+ char *modifier_name = NULL;
+ bool result = false;
+
+ fp = open_memstream(&modifier_name, &size);
+ if (!fp)
+ return NULL;
+
+ switch (type) {
+ case DRM_FORMAT_MOD_ARM_TYPE_AFBC:
+ result = drmGetAfbcFormatModifierNameFromArm(modifier, fp);
+ break;
+ case DRM_FORMAT_MOD_ARM_TYPE_AFRC:
+ result = drmGetAfrcFormatModifierNameFromArm(modifier, fp);
+ break;
+ /* misc type is already handled by the static table */
+ case DRM_FORMAT_MOD_ARM_TYPE_MISC:
+ default:
+ result = false;
+ break;
+ }
+
+ fclose(fp);
+ if (!result) {
+ free(modifier_name);
+ return NULL;
+ }
+
+ 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);
+ 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);
+ 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)
+ 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) {
+ 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<Device> 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 = (enum drm_map_type)type;
+ map.flags = (enum drm_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 = (int)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 = (enum drm_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 = (drmMapType)map.type;
+ *flags = (drmMapFlags)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) {
+ if (snprintf(dev_name, sizeof(dev_name), DRM_DIR_NAME "/%s",
+ ent->d_name) < 0)
+ return NULL;
+
+ 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++) {
+ if (snprintf(path, PATH_MAX, "%s/%s", pci_path, attrs[i]) < 0)
+ return -errno;
+
+ 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);
+
+ if (snprintf(path, PATH_MAX, "%s/config", pci_path) < 0)
+ return -errno;
+
+ 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);
+ 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 a device from its dev_t identifier
+ *
+ * \param find_rdev dev_t identifier of the 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.
+ */
+drm_public int drmGetDeviceFromDevId(dev_t find_rdev, 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;
+ char node[PATH_MAX + 1];
+ const char *dev_name;
+ int node_type, subsystem_type;
+ int maj, min, n, ret;
+
+ if (device == NULL)
+ return -EINVAL;
+
+ maj = major(find_rdev);
+ min = minor(find_rdev);
+
+ if (!drmNodeIsDRM(maj, min))
+ 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;
+ int subsystem_type;
+ int maj, min;
+ int ret, i, node_count;
+
+ if (drm_device_validate_flags(flags))
+ return -EINVAL;
+
+ if (device == NULL)
+ return -EINVAL;
+
+ maj = major(find_rdev);
+ min = minor(find_rdev);
+
+ if (!drmNodeIsDRM(maj, min))
+ 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 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)
+{
+ struct stat sbuf;
+
+ if (fd == -1)
+ return -EINVAL;
+
+ if (fstat(fd, &sbuf))
+ return -errno;
+
+ if (!S_ISCHR(sbuf.st_mode))
+ return -EINVAL;
+
+ return drmGetDeviceFromDevId(sbuf.st_rdev, flags, device);
+}
+
+/**
+ * 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;
+}
+
+/**
+ * Get a human-readable name for a DRM FourCC format.
+ *
+ * \param format The format.
+ * \return A malloc'ed string containing the format name. Caller is responsible
+ * for freeing it.
+ */
+drm_public char *
+drmGetFormatName(uint32_t format)
+{
+ char *str, code[5];
+ const char *be;
+ size_t str_size, i;
+
+ be = (format & DRM_FORMAT_BIG_ENDIAN) ? "_BE" : "";
+ format &= ~DRM_FORMAT_BIG_ENDIAN;
+
+ if (format == DRM_FORMAT_INVALID)
+ return strdup("INVALID");
+
+ code[0] = (char) ((format >> 0) & 0xFF);
+ code[1] = (char) ((format >> 8) & 0xFF);
+ code[2] = (char) ((format >> 16) & 0xFF);
+ code[3] = (char) ((format >> 24) & 0xFF);
+ code[4] = '\0';
+
+ /* Trim spaces at the end */
+ for (i = 3; i > 0 && code[i] == ' '; i--)
+ code[i] = '\0';
+
+ str_size = strlen(code) + strlen(be) + 1;
+ str = malloc(str_size);
+ if (!str)
+ return NULL;
+
+ snprintf(str, str_size, "%s%s", code, be);
+
+ return str;
+}