Add gbm (generic/graphics buffer manager)

13 files changed, 900 insertions, 0 deletions

diff --git a/src/gbm/Makefile b/src/gbm/Makefile
new file mode 100644
index 0000000..4769a97
--- /dev/null
+++ b/src/gbm/Makefile
@@ -0,0 +1,14 @@
+# src/gbm/Makefile
+
+TOP = ../..
+include $(TOP)/configs/current
+
+SUBDIRS = backends main
+
+
+default install clean:
+	@for dir in $(SUBDIRS) ; do \
+		if [ -d $$dir ] ; then \
+			(cd $$dir && $(MAKE) $@) || exit 1 ; \
+		fi \
+	done
diff --git a/src/gbm/backends/Makefile b/src/gbm/backends/Makefile
new file mode 100644
index 0000000..97eaac4
--- /dev/null
+++ b/src/gbm/backends/Makefile
@@ -0,0 +1,14 @@
+# src/gbm/backends/Makefile
+
+TOP = ../../..
+include $(TOP)/configs/current
+
+SUBDIRS = $(GBM_BACKEND_DIRS)
+
+
+default install clean:
+	@for dir in $(SUBDIRS) ; do \
+		if [ -d $$dir ] ; then \
+			(cd $$dir ; $(MAKE) $@) || exit 1 ; \
+		fi \
+	done
diff --git a/src/gbm/backends/Makefile.template b/src/gbm/backends/Makefile.template
new file mode 100644
index 0000000..90b239a
--- /dev/null
+++ b/src/gbm/backends/Makefile.template
@@ -0,0 +1,65 @@
+# src/gbm/backends/Makefile.template
+#
+# Backends should define
+#
+# GBM_BACKEND, the driver name
+# GBM_SOURCES, the driver sources
+# GBM_INCLUDES, the include pathes
+# GBM_CFLAGS, additional CFLAGS
+# GBM_LIBS, additional LIBS
+#
+# before including this template.
+#
+
+
+GBM_BACKEND_PATH = $(TOP)/$(LIB_DIR)/gbm/$(GBM_BACKEND).so
+GBM_OBJECTS = $(GBM_SOURCES:.c=.o)
+
+# built-in or external
+ifeq ($(GBM_BUILTIN), true)
+GBM_TARGET = lib$(GBM_BACKEND).a
+GBM_INSTALL =
+else
+GBM_TARGET = $(GBM_BACKEND_PATH)
+GBM_INSTALL = install-so
+endif
+
+default: depend $(GBM_TARGET)
+
+$(GBM_BACKEND_PATH): $(GBM_BACKEND).so
+	@$(INSTALL) -d $(TOP)/$(LIB_DIR)/gbm
+	$(INSTALL) $< $(TOP)/$(LIB_DIR)/gbm
+
+$(GBM_BACKEND).so: $(GBM_OBJECTS) Makefile $(TOP)/src/gbm/backends/Makefile.template
+	@$(MKLIB) -o $(GBM_BACKEND).so -noprefix \
+		-linker '$(CC)' -ldflags '-L$(TOP)/$(LIB_DIR) $(LDFLAGS)' \
+		$(MKLIB_OPTIONS) \
+		$(GBM_OBJECTS) $(GBM_LIBS) -l$(GBM_LIB)
+
+lib$(GBM_BACKEND).a: $(GBM_OBJECTS) Makefile $(TOP)/src/gbm/backends/Makefile.template
+	@$(MKLIB) -o $(GBM_BACKEND) -static $(GBM_OBJECTS)
+
+.c.o:
+	$(CC) -c $(GBM_INCLUDES) $(CFLAGS) $(GBM_CFLAGS) $< -o $@
+
+install-so: $(GBM_BACKEND_PATH)
+	$(INSTALL) -d $(DESTDIR)$(GBM_BACKEND_INSTALL_DIR)
+	$(MINSTALL) $(GBM_BACKEND_PATH) $(DESTDIR)$(GBM_BACKEND_INSTALL_DIR)
+
+install: $(GBM_INSTALL)
+
+clean:
+	rm -f $(GBM_BACKEND).so
+	rm -f lib$(GBM_BACKEND).a
+	rm -f $(GBM_OBJECTS)
+	rm -f depend depend.bak
+
+depend: $(GBM_SOURCES)
+	@ echo "running $(MKDEP)"
+	@ rm -f depend
+	@ touch depend
+	$(MKDEP) $(MKDEP_OPTIONS) $(GBM_INCLUDES) $(GBM_SOURCES) \
+		>/dev/null 2>/dev/null
+
+sinclude depend
+# DO NOT DELETE
diff --git a/src/gbm/main/Makefile b/src/gbm/main/Makefile
new file mode 100644
index 0000000..277fba1
--- /dev/null
+++ b/src/gbm/main/Makefile
@@ -0,0 +1,85 @@
+# src/gbm/main/Makefile
+
+TOP = ../../..
+include $(TOP)/configs/current
+
+INCLUDE_DIRS = -I$(TOP)/include
+
+HEADERS =		\
+	common.h	\
+	backend.h	\
+	gbmint.h	\
+	gbm.h	
+
+SOURCES =		\
+	gbm.c		\
+	backend.c	\
+	common.c
+
+OBJECTS = $(SOURCES:.c=.o)
+
+# use dl*() to load drivers
+LOCAL_CFLAGS = $(LIBUDEV_CFLAGS) $(DLOPEN_CFLAGS) \
+	       -D_OS_UNIX=1 -DMODULEDIR='"$(GBM_BACKEND_INSTALL_DIR)"'
+LOCAL_LIBS =
+
+.c.o:
+	$(CC) -c $(INCLUDE_DIRS) $(CFLAGS) $(LOCAL_CFLAGS) $< -o $@
+
+
+default: depend library
+
+
+library: $(TOP)/$(LIB_DIR)/libgbm.so
+
+$(TOP)/$(LIB_DIR)/libgbm.so: $(OBJECTS) $(LOCAL_LIBS)
+	$(MKLIB) -o gbm -linker '$(CC)' -ldflags '$(LDFLAGS)' \
+		-major 1 -minor 0 \
+		-install $(TOP)/$(LIB_DIR) $(MKLIB_OPTIONS) \
+		-L$(TOP)/$(LIB_DIR) $(GBM_LIB_DEPS) \
+		$(OBJECTS) $(LOCAL_LIBS)
+
+install-headers:
+	$(INSTALL) -d $(DESTDIR)$(INSTALL_INC_DIR)/
+	$(INSTALL) -m 644 $(TOP)/src/gbm/main/gbm.h \
+		$(DESTDIR)$(INSTALL_INC_DIR)
+
+
+PKG_CONFIG_DIR = $(INSTALL_LIB_DIR)/pkgconfig
+
+gbm_pcedit = sed \
+	-e 's,@INSTALL_DIR@,$(INSTALL_DIR),' \
+	-e 's,@INSTALL_LIB_DIR@,$(INSTALL_LIB_DIR),' \
+	-e 's,@INSTALL_INC_DIR@,$(INSTALL_INC_DIR),' \
+	-e 's,@VERSION@,0.0.0,' \
+	-e 's,@GBM_PC_REQ_PRIV@,$(GBM_PC_REQ_PRIV),' \
+	-e 's,@GBM_PC_LIB_PRIV@,$(GBM_PC_LIB_PRIV),' \
+	-e 's,@GBM_PC_CFLAGS@,$(GBM_PC_CFLAGS),' \
+	-e 's,@GBM_LIB@,$(GBM_LIB),'
+
+gbm.pc: gbm.pc.in
+	$(gbm_pcedit) $< > $@
+
+install: default install-headers gbm.pc
+	$(INSTALL) -d $(DESTDIR)$(INSTALL_LIB_DIR)
+	$(MINSTALL) $(TOP)/$(LIB_DIR)/libgbm.so* \
+		$(DESTDIR)$(INSTALL_LIB_DIR)
+	$(INSTALL) -d $(DESTDIR)$(PKG_CONFIG_DIR)
+	$(INSTALL) -m 644 gbm.pc $(DESTDIR)$(PKG_CONFIG_DIR)
+
+clean:
+	-rm -f *.o
+	-rm -f depend depend.bak
+	-rm -f gbm.pc
+
+
+depend: $(SOURCES) $(HEADERS)
+	@ echo "running $(MKDEP)"
+	@ rm -f depend
+	@ touch depend
+	$(MKDEP) $(MKDEP_OPTIONS) $(DEFINES) $(INCLUDE_DIRS) \
+		$(SOURCES) $(HEADERS) > /dev/null 2>/dev/null
+
+
+-include depend
+# DO NOT DELETE
diff --git a/src/gbm/main/backend.c b/src/gbm/main/backend.c
new file mode 100644
index 0000000..2079bbb
--- /dev/null
+++ b/src/gbm/main/backend.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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 THE AUTHORS OR COPYRIGHT
+ * HOLDERS 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.
+ *
+ * Authors:
+ *    Benjamin Franzke <benjaminfranzke@googlemail.com>
+ */
+
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <dlfcn.h>
+
+#include "backend.h"
+
+#define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
+
+struct backend_desc {
+   const char *name;
+   const struct gbm_backend *builtin;
+};
+
+static const struct backend_desc backends[] = {
+};
+
+static const void *
+load_backend(const struct backend_desc *backend)
+{
+   char path[PATH_MAX];
+   const void *init = NULL;
+   void *module;
+   const char *name;
+   const char *entrypoint = "gbm_backend";
+
+   if (backend == NULL)
+      return NULL;
+
+   name = backend->name;
+
+   if (backend->builtin) {
+      init = backend->builtin;
+   } else { 
+      if (name[0] != '/')
+         snprintf(path, sizeof path, MODULEDIR "/%s", name);
+      else
+         snprintf(path, sizeof path, "%s", name);
+
+      module = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
+      if (!module) {
+         fprintf(stderr,
+                 "failed to load module: %s\n", dlerror());
+         return NULL;
+      }
+
+      init = dlsym(module, entrypoint);
+      if (!init)
+         return NULL;
+   }
+
+   return init;
+}
+
+static const struct backend_desc *
+find_backend(const char *name)
+{
+   const struct backend_desc *backend = NULL;
+   int i;
+
+   for (i = 0; i < ARRAY_SIZE(backends); ++i) {
+      if (strcmp(backends[i].name, name) == 0) {
+         backend = &backends[i];
+         break;
+      }
+   }
+
+   return backend;
+}
+
+struct gbm_device *
+_gbm_create_device(int fd)
+{
+   const struct gbm_backend *backend = NULL;
+   struct gbm_device *dev = NULL;
+   int i;
+   const char *b;
+
+   b = getenv("GBM_BACKEND");
+   if (b)
+      backend = load_backend(find_backend(b));
+
+   if (backend)
+      dev = backend->create_device(fd);
+
+   for (i = 0; i < ARRAY_SIZE(backends) && dev == NULL; ++i) {
+      backend = load_backend(&backends[i]);
+      if (backend == NULL)
+         continue;
+
+      dev = backend->create_device(fd);
+   }
+   
+   return dev;
+}
diff --git a/src/gbm/main/backend.h b/src/gbm/main/backend.h
new file mode 100644
index 0000000..4a64375
--- /dev/null
+++ b/src/gbm/main/backend.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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 THE AUTHORS OR COPYRIGHT
+ * HOLDERS 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.
+ *
+ * Authors:
+ *    Benjamin Franzke <benjaminfranzke@googlemail.com>
+ */
+
+#ifndef MODULE_H_
+#define MODULE_H_
+
+#include "gbmint.h"
+
+struct gbm_device *
+_gbm_create_device(int fd);
+
+#endif
diff --git a/src/gbm/main/common.c b/src/gbm/main/common.c
new file mode 100644
index 0000000..f02162d
--- /dev/null
+++ b/src/gbm/main/common.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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 THE AUTHORS OR COPYRIGHT
+ * HOLDERS 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.
+ *
+ * Authors:
+ *    Benjamin Franzke <benjaminfranzke@googlemail.com>
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <libudev.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "gbmint.h"
+
+GBM_EXPORT struct udev_device *
+_gbm_udev_device_new_from_fd(struct udev *udev, int fd)
+{
+   struct udev_device *device;
+   struct stat buf;
+
+   if (fstat(fd, &buf) < 0) {
+      fprintf(stderr, "gbm: failed to stat fd %d", fd);
+      return NULL;
+   }
+
+   device = udev_device_new_from_devnum(udev, 'c', buf.st_rdev);
+   if (device == NULL) {
+      fprintf(stderr,
+              "gbm: could not create udev device for fd %d", fd);
+      return NULL;
+   }
+
+   return device;
+}
+
+GBM_EXPORT char *
+_gbm_fd_get_device_name(int fd)
+{
+   struct udev *udev;
+   struct udev_device *device;
+   const char *const_device_name;
+   char *device_name = NULL;
+
+   udev = udev_new();
+   device = _gbm_udev_device_new_from_fd(udev, fd);
+   if (device == NULL)
+      return NULL;
+
+   const_device_name = udev_device_get_devnode(device);
+   if (!const_device_name)
+      goto out;
+   device_name = strdup(const_device_name);
+
+out:
+   udev_device_unref(device);
+   udev_unref(udev);
+
+   return device_name;
+}
+
+GBM_EXPORT void
+_gbm_log(const char *fmt_str, ...)
+{
+}
diff --git a/src/gbm/main/common.h b/src/gbm/main/common.h
new file mode 100644
index 0000000..1fcdfca
--- /dev/null
+++ b/src/gbm/main/common.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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 THE AUTHORS OR COPYRIGHT
+ * HOLDERS 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.
+ *
+ * Authors:
+ *    Benjamin Franzke <benjaminfranzke@googlemail.com>
+ */
+
+#ifndef _COMMON_H_
+#define _COMMON_H_
+
+#include <libudev.h>
+
+struct udev_device *
+_gbm_udev_device_new_from_fd(struct udev *udev, int fd);
+
+char *
+_gbm_fd_get_device_name(int fd);
+
+void
+_gbm_log(const char *fmt_str, ...);
+
+#endif
diff --git a/src/gbm/main/common_drm.h b/src/gbm/main/common_drm.h
new file mode 100644
index 0000000..d28c3f0
--- /dev/null
+++ b/src/gbm/main/common_drm.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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 THE AUTHORS OR COPYRIGHT
+ * HOLDERS 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.
+ *
+ * Authors:
+ *    Benjamin Franzke <benjaminfranzke@googlemail.com>
+ */
+
+#ifndef _COMMON_DRM_H_
+#define _COMMON_DRM_H_
+
+#include "gbmint.h"
+
+enum gbm_drm_driver_type {
+   GBM_DRM_DRIVER_TYPE_DRI,
+   GBM_DRM_DRIVER_TYPE_GALLIUM,
+};
+
+struct gbm_drm_device {
+   struct gbm_device base;
+   enum gbm_drm_driver_type type;
+   char *driver_name;
+};
+
+struct gbm_drm_bo {
+   struct gbm_bo base;
+};
+
+#endif
diff --git a/src/gbm/main/gbm.c b/src/gbm/main/gbm.c
new file mode 100644
index 0000000..8440b2c
--- /dev/null
+++ b/src/gbm/main/gbm.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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 THE AUTHORS OR COPYRIGHT
+ * HOLDERS 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.
+ *
+ * Authors:
+ *    Benjamin Franzke <benjaminfranzke@googlemail.com>
+ */
+
+#define _BSD_SOURCE
+
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "gbm.h"
+#include "gbmint.h"
+#include "common.h"
+#include "backend.h"
+
+#define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
+
+struct gbm_device *devices[16];
+
+static int device_num = 0;
+
+GBM_EXPORT int
+gbm_device_get_fd(struct gbm_device *gbm)
+{
+   return gbm->fd;
+}
+
+/* FIXME: maybe superfluous, use udev subclass from the fd? */
+GBM_EXPORT const char *
+gbm_device_get_backend_name(struct gbm_device *gbm)
+{
+   return gbm->name;
+}
+
+int
+gbm_device_is_format_supported(struct gbm_device *gbm,
+                               enum gbm_bo_format format,
+                               uint32_t usage)
+{
+   return gbm->is_format_supported(gbm, format, usage);
+}
+
+GBM_EXPORT void
+gbm_device_destroy(struct gbm_device *gbm)
+{
+   gbm->refcount--;
+   if (gbm->refcount == 0)
+      gbm->destroy(gbm);
+}
+
+GBM_EXPORT struct gbm_device *
+_gbm_mesa_get_device(int fd)
+{
+   struct gbm_device *gbm = NULL;
+   struct stat buf;
+   dev_t dev;
+   int i;
+
+   if (fd < 0 || fstat(fd, &buf) < 0 || !S_ISCHR(buf.st_mode)) {
+      fprintf(stderr, "_gbm_mesa_get_device: invalid fd: %d\n", fd);
+      return NULL;
+   }
+
+   for (i = 0; i < device_num; ++i) {
+      dev = devices[i]->stat.st_rdev;
+      if (major(dev) == major(buf.st_rdev) &&
+          minor(dev) == minor(buf.st_rdev)) {
+         gbm = devices[i];
+         gbm->refcount++;
+         break;
+      }
+   }
+
+   return gbm;
+}
+
+GBM_EXPORT struct gbm_device *
+gbm_create_device(int fd)
+{
+   struct gbm_device *gbm = NULL;
+   struct stat buf;
+
+   if (fd < 0 || fstat(fd, &buf) < 0 || !S_ISCHR(buf.st_mode)) {
+      fprintf(stderr, "gbm_create_device: invalid fd: %d\n", fd);
+      return NULL;
+   }
+
+   if (device_num == 0)
+      memset(devices, 0, sizeof devices);
+
+   gbm = _gbm_create_device(fd);
+   if (gbm == NULL)
+      return NULL;
+
+   gbm->dummy = gbm_create_device;
+   gbm->stat = buf;
+   gbm->refcount = 1;
+
+   if (device_num < ARRAY_SIZE(devices)-1)
+      devices[device_num++] = gbm;
+
+   return gbm;
+}
+
+GBM_EXPORT unsigned int
+gbm_bo_get_width(struct gbm_bo *bo)
+{
+   return bo->width;
+}
+
+GBM_EXPORT unsigned int
+gbm_bo_get_height(struct gbm_bo *bo)
+{
+   return bo->height;
+}
+
+GBM_EXPORT uint32_t
+gbm_bo_get_pitch(struct gbm_bo *bo)
+{
+   return bo->pitch;
+}
+
+GBM_EXPORT union gbm_bo_handle
+gbm_bo_get_handle(struct gbm_bo *bo)
+{
+   return bo->handle;
+}
+
+GBM_EXPORT void
+gbm_bo_destroy(struct gbm_bo *bo)
+{
+   bo->gbm->bo_destroy(bo);
+}
+
+GBM_EXPORT struct gbm_bo *
+gbm_bo_create(struct gbm_device *gbm,
+              uint32_t width, uint32_t height,
+              enum gbm_bo_format format, uint32_t usage)
+{
+   if (width == 0 || height == 0)
+      return NULL;
+
+   if (usage & GBM_BO_USE_CURSOR_64X64 &&
+       (width != 64 || height != 64))
+      return NULL;
+
+   return gbm->bo_create(gbm, width, height, format, usage);
+}
+
+GBM_EXPORT struct gbm_bo *
+gbm_bo_create_from_egl_image(struct gbm_device *gbm,
+                             void *egl_dpy, void *egl_image,
+                             uint32_t width, uint32_t height,
+                             uint32_t usage)
+{
+   if (width == 0 || height == 0)
+      return NULL;
+
+   return gbm->bo_create_from_egl_image(gbm, egl_dpy, egl_image,
+                                        width, height, usage);
+}
diff --git a/src/gbm/main/gbm.h b/src/gbm/main/gbm.h
new file mode 100644
index 0000000..d79a03e
--- /dev/null
+++ b/src/gbm/main/gbm.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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 THE AUTHORS OR COPYRIGHT
+ * HOLDERS 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.
+ *
+ * Authors:
+ *    Benjamin Franzke <benjaminfranzke@googlemail.com>
+ */
+
+#ifndef _GBM_H_
+#define _GBM_H_
+
+#define __GBM__ 1
+
+#include <stdint.h>
+
+struct gbm_device;
+struct gbm_bo;
+
+union gbm_bo_handle {
+   void *ptr;
+   int32_t s32;
+   uint32_t u32;
+   int64_t s64;
+   uint64_t u64;
+};
+
+enum gbm_bo_format {
+   GBM_BO_FORMAT_XRGB8888,
+   GBM_BO_FORMAT_ARGB8888,
+};
+
+enum gbm_bo_flags {
+   GBM_BO_USE_SCANOUT      = (1 << 0),
+   GBM_BO_USE_CURSOR_64X64 = (1 << 1),
+   GBM_BO_USE_RENDERING    = (1 << 2),
+};
+
+int
+gbm_device_get_fd(struct gbm_device *gbm);
+
+const char *
+gbm_device_get_backend_name(struct gbm_device *gbm);
+
+int
+gbm_device_is_format_supported(struct gbm_device *gbm,
+                               enum gbm_bo_format format,
+                               uint32_t usage);
+
+void
+gbm_device_destroy(struct gbm_device *gbm);
+
+struct gbm_device *
+gbm_create_device(int fd);
+
+struct gbm_bo *
+gbm_bo_create(struct gbm_device *gbm,
+              uint32_t width, uint32_t height,
+              enum gbm_bo_format format, uint32_t flags);
+
+struct gbm_bo *
+gbm_bo_create_from_egl_image(struct gbm_device *gbm,
+                             void *egl_dpy, void *egl_img,
+                             uint32_t width, uint32_t height,
+                             uint32_t usage);
+
+uint32_t
+gbm_bo_get_width(struct gbm_bo *bo);
+
+uint32_t
+gbm_bo_get_height(struct gbm_bo *bo);
+
+uint32_t
+gbm_bo_get_pitch(struct gbm_bo *bo);
+
+union gbm_bo_handle
+gbm_bo_get_handle(struct gbm_bo *bo);
+
+void
+gbm_bo_destroy(struct gbm_bo *bo);
+
+#endif
diff --git a/src/gbm/main/gbm.pc.in b/src/gbm/main/gbm.pc.in
new file mode 100644
index 0000000..76299e7
--- /dev/null
+++ b/src/gbm/main/gbm.pc.in
@@ -0,0 +1,12 @@
+prefix=@INSTALL_DIR@
+exec_prefix=${prefix}
+libdir=@INSTALL_LIB_DIR@
+includedir=@INSTALL_INC_DIR@
+
+Name: gbm
+Description: Mesa gbm library
+Requires.private: @GBM_PC_REQ_PRIV@
+Version: @VERSION@
+Libs: -L${libdir} -l@GBM_LIB@
+Libs.private: @GBM_PC_LIB_PRIV@
+Cflags: -I${includedir} @GBM_PC_CFLAGS@
diff --git a/src/gbm/main/gbmint.h b/src/gbm/main/gbmint.h
new file mode 100644
index 0000000..fb8db80
--- /dev/null
+++ b/src/gbm/main/gbmint.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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 THE AUTHORS OR COPYRIGHT
+ * HOLDERS 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.
+ *
+ * Authors:
+ *    Benjamin Franzke <benjaminfranzke@googlemail.com>
+ */
+
+#ifndef INTERNAL_H_
+#define INTERNAL_H_
+
+#include "gbm.h"
+#include <sys/stat.h>
+
+/* GCC visibility */
+#if defined(__GNUC__) && __GNUC__ >= 4
+#define GBM_EXPORT __attribute__ ((visibility("default")))
+#else
+#define GBM_EXPORT
+#endif
+
+struct gbm_device {
+   /* Hack to make a gbm_device detectable by its first element. */
+   struct gbm_device *(*dummy)(int);
+
+   int fd;
+   const char *name;
+   unsigned int refcount;
+   struct stat stat;
+
+   void (*destroy)(struct gbm_device *gbm);
+   int (*is_format_supported)(struct gbm_device *gbm,
+                              enum gbm_bo_format format,
+                              uint32_t usage);
+
+   struct gbm_bo *(*bo_create)(struct gbm_device *gbm,
+                               uint32_t width, uint32_t height,
+                               enum gbm_bo_format format,
+                               uint32_t usage);
+   struct gbm_bo *(*bo_create_from_egl_image)(struct gbm_device *gbm,
+                                              void *egl_dpy, void *egl_img,
+                                              uint32_t width, uint32_t height,
+                                              uint32_t usage);
+   void (*bo_destroy)(struct gbm_bo *bo);
+};
+
+struct gbm_bo {
+   struct gbm_device *gbm;
+   uint32_t width;
+   uint32_t height;
+   uint32_t pitch;
+   union gbm_bo_handle  handle;
+};
+
+struct gbm_backend {
+   const char *backend_name;
+   struct gbm_device *(*create_device)(int fd);
+};
+
+GBM_EXPORT struct gbm_device *
+_gbm_mesa_get_device(int fd);
+
+#endif