freedreno/freedreno_bo.c - platform/external/libdrm - Gitiles

 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */

 /*
  * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
  *
  * 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:
  *    Rob Clark <robclark@freedesktop.org>
  */

 #ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif

 #include "freedreno_drmif.h"
 #include "freedreno_priv.h"

 static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;

 static void bo_del(struct fd_bo *bo);

 /* set buffer name, and add to table, call w/ table_lock held: */
 static void set_name(struct fd_bo *bo, uint32_t name)
 {
 	bo->name = name;
 	/* add ourself into the handle table: */
 	drmHashInsert(bo->dev->name_table, name, bo);
 }

 /* lookup a buffer, call w/ table_lock held: */
 static struct fd_bo * lookup_bo(void *tbl, uint32_t key)
 {
 	struct fd_bo *bo = NULL;
 	if (!drmHashLookup(tbl, key, (void **)&bo)) {
 		/* found, incr refcnt and return: */
 		bo = fd_bo_ref(bo);

 		/* don't break the bucket if this bo was found in one */
 		list_delinit(&bo->list);
 	}
 	return bo;
 }

 /* allocate a new buffer object, call w/ table_lock held */
 static struct fd_bo * bo_from_handle(struct fd_device *dev,
 		uint32_t size, uint32_t handle)
 {
 	struct fd_bo *bo;

 	bo = dev->funcs->bo_from_handle(dev, size, handle);
 	if (!bo) {
 		struct drm_gem_close req = {
 				.handle = handle,
 		};
 		drmIoctl(dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
 		return NULL;
 	}
 	bo->dev = fd_device_ref(dev);
 	bo->size = size;
 	bo->handle = handle;
 	atomic_set(&bo->refcnt, 1);
 	list_inithead(&bo->list);
 	/* add ourself into the handle table: */
 	drmHashInsert(dev->handle_table, handle, bo);
 	return bo;
 }

 /* Frees older cached buffers.  Called under table_lock */
 drm_private void fd_cleanup_bo_cache(struct fd_device *dev, time_t time)
 {
 	int i;

 	if (dev->time == time)
 		return;

 	for (i = 0; i < dev->num_buckets; i++) {
 		struct fd_bo_bucket *bucket = &dev->cache_bucket[i];
 		struct fd_bo *bo;

 		while (!LIST_IS_EMPTY(&bucket->list)) {
 			bo = LIST_ENTRY(struct fd_bo, bucket->list.next, list);

 			/* keep things in cache for at least 1 second: */
 			if (time && ((time - bo->free_time) <= 1))
 				break;

 			list_del(&bo->list);
 			bo_del(bo);
 		}
 	}

 	dev->time = time;
 }

 static struct fd_bo_bucket * get_bucket(struct fd_device *dev, uint32_t size)
 {
 	int i;

 	/* hmm, this is what intel does, but I suppose we could calculate our
 	 * way to the correct bucket size rather than looping..
 	 */
 	for (i = 0; i < dev->num_buckets; i++) {
 		struct fd_bo_bucket *bucket = &dev->cache_bucket[i];
 		if (bucket->size >= size) {
 			return bucket;
 		}
 	}

 	return NULL;
 }

 static int is_idle(struct fd_bo *bo)
 {
 	return fd_bo_cpu_prep(bo, NULL,
 			DRM_FREEDRENO_PREP_READ |
 			DRM_FREEDRENO_PREP_WRITE |
 			DRM_FREEDRENO_PREP_NOSYNC) == 0;
 }

 static struct fd_bo *find_in_bucket(struct fd_device *dev,
 		struct fd_bo_bucket *bucket, uint32_t flags)
 {
 	struct fd_bo *bo = NULL;

 	/* TODO .. if we had an ALLOC_FOR_RENDER flag like intel, we could
 	 * skip the busy check.. if it is only going to be a render target
 	 * then we probably don't need to stall..
 	 *
 	 * NOTE that intel takes ALLOC_FOR_RENDER bo's from the list tail
 	 * (MRU, since likely to be in GPU cache), rather than head (LRU)..
 	 */
 	pthread_mutex_lock(&table_lock);
 	while (!LIST_IS_EMPTY(&bucket->list)) {
 		bo = LIST_ENTRY(struct fd_bo, bucket->list.next, list);
 		if (0 /* TODO: if madvise tells us bo is gone... */) {
 			list_del(&bo->list);
 			bo_del(bo);
 			bo = NULL;
 			continue;
 		}
 		/* TODO check for compatible flags? */
 		if (is_idle(bo)) {
 			list_del(&bo->list);
 			break;
 		}
 		bo = NULL;
 		break;
 	}
 	pthread_mutex_unlock(&table_lock);

 	return bo;
 }


 struct fd_bo *
 fd_bo_new(struct fd_device *dev, uint32_t size, uint32_t flags)
 {
 	struct fd_bo *bo = NULL;
 	struct fd_bo_bucket *bucket;
 	uint32_t handle;
 	int ret;

 	size = ALIGN(size, 4096);
 	bucket = get_bucket(dev, size);

 	/* see if we can be green and recycle: */
 	if (bucket) {
 		size = bucket->size;
 		bo = find_in_bucket(dev, bucket, flags);
 		if (bo) {
 			atomic_set(&bo->refcnt, 1);
 			fd_device_ref(bo->dev);
 			return bo;
 		}
 	}

 	ret = dev->funcs->bo_new_handle(dev, size, flags, &handle);
 	if (ret)
 		return NULL;

 	pthread_mutex_lock(&table_lock);
 	bo = bo_from_handle(dev, size, handle);
 	bo->bo_reuse = 1;
 	pthread_mutex_unlock(&table_lock);

 	return bo;
 }

 struct fd_bo *
 fd_bo_from_handle(struct fd_device *dev, uint32_t handle, uint32_t size)
 {
 	struct fd_bo *bo = NULL;

 	pthread_mutex_lock(&table_lock);

 	bo = lookup_bo(dev->handle_table, handle);
 	if (bo)
 		goto out_unlock;

 	bo = bo_from_handle(dev, size, handle);

 out_unlock:
 	pthread_mutex_unlock(&table_lock);

 	return bo;
 }

 struct fd_bo *
 fd_bo_from_dmabuf(struct fd_device *dev, int fd)
 {
 	int ret, size;
 	uint32_t handle;
 	struct fd_bo *bo;

 	pthread_mutex_lock(&table_lock);
 	ret = drmPrimeFDToHandle(dev->fd, fd, &handle);
 	if (ret) {
 		return NULL;
 	}

 	bo = lookup_bo(dev->handle_table, handle);
 	if (bo)
 		goto out_unlock;

 	/* lseek() to get bo size */
 	size = lseek(fd, 0, SEEK_END);
 	lseek(fd, 0, SEEK_CUR);

 	bo = bo_from_handle(dev, size, handle);

 out_unlock:
 	pthread_mutex_unlock(&table_lock);

 	return bo;
 }

 struct fd_bo * fd_bo_from_name(struct fd_device *dev, uint32_t name)
 {
 	struct drm_gem_open req = {
 			.name = name,
 	};
 	struct fd_bo *bo;

 	pthread_mutex_lock(&table_lock);

 	/* check name table first, to see if bo is already open: */
 	bo = lookup_bo(dev->name_table, name);
 	if (bo)
 		goto out_unlock;

 	if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
 		ERROR_MSG("gem-open failed: %s", strerror(errno));
 		goto out_unlock;
 	}

 	bo = lookup_bo(dev->handle_table, req.handle);
 	if (bo)
 		goto out_unlock;

 	bo = bo_from_handle(dev, req.size, req.handle);
 	if (bo)
 		set_name(bo, name);

 out_unlock:
 	pthread_mutex_unlock(&table_lock);

 	return bo;
 }

 struct fd_bo * fd_bo_ref(struct fd_bo *bo)
 {
 	atomic_inc(&bo->refcnt);
 	return bo;
 }

 void fd_bo_del(struct fd_bo *bo)
 {
 	struct fd_device *dev = bo->dev;

 	if (!atomic_dec_and_test(&bo->refcnt))
 		return;

 	pthread_mutex_lock(&table_lock);

 	if (bo->bo_reuse) {
 		struct fd_bo_bucket *bucket = get_bucket(dev, bo->size);

 		/* see if we can be green and recycle: */
 		if (bucket) {
 			struct timespec time;

 			clock_gettime(CLOCK_MONOTONIC, &time);

 			bo->free_time = time.tv_sec;
 			list_addtail(&bo->list, &bucket->list);
 			fd_cleanup_bo_cache(dev, time.tv_sec);

 			/* bo's in the bucket cache don't have a ref and
 			 * don't hold a ref to the dev:
 			 */

 			goto out;
 		}
 	}

 	bo_del(bo);
 out:
 	fd_device_del_locked(dev);
 	pthread_mutex_unlock(&table_lock);
 }

 /* Called under table_lock */
 static void bo_del(struct fd_bo *bo)
 {
 	if (bo->map)
 		drm_munmap(bo->map, bo->size);

 	/* TODO probably bo's in bucket list get removed from
 	 * handle table??
 	 */

 	if (bo->handle) {
 		struct drm_gem_close req = {
 				.handle = bo->handle,
 		};
 		drmHashDelete(bo->dev->handle_table, bo->handle);
 		if (bo->name)
 			drmHashDelete(bo->dev->name_table, bo->name);
 		drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
 	}

 	bo->funcs->destroy(bo);
 }

 int fd_bo_get_name(struct fd_bo *bo, uint32_t *name)
 {
 	if (!bo->name) {
 		struct drm_gem_flink req = {
 				.handle = bo->handle,
 		};
 		int ret;

 		ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
 		if (ret) {
 			return ret;
 		}

 		pthread_mutex_lock(&table_lock);
 		set_name(bo, req.name);
 		pthread_mutex_unlock(&table_lock);
 		bo->bo_reuse = 0;
 	}

 	*name = bo->name;

 	return 0;
 }

 uint32_t fd_bo_handle(struct fd_bo *bo)
 {
 	return bo->handle;
 }

 int fd_bo_dmabuf(struct fd_bo *bo)
 {
 	int ret, prime_fd;

 	ret = drmPrimeHandleToFD(bo->dev->fd, bo->handle, DRM_CLOEXEC,
 			&prime_fd);
 	if (ret) {
 		ERROR_MSG("failed to get dmabuf fd: %d", ret);
 		return ret;
 	}

 	bo->bo_reuse = 0;

 	return prime_fd;
 }

 uint32_t fd_bo_size(struct fd_bo *bo)
 {
 	return bo->size;
 }

 void * fd_bo_map(struct fd_bo *bo)
 {
 	if (!bo->map) {
 		uint64_t offset;
 		int ret;

 		ret = bo->funcs->offset(bo, &offset);
 		if (ret) {
 			return NULL;
 		}

 		bo->map = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 				bo->dev->fd, offset);
 		if (bo->map == MAP_FAILED) {
 			ERROR_MSG("mmap failed: %s", strerror(errno));
 			bo->map = NULL;
 		}
 	}
 	return bo->map;
 }

 /* a bit odd to take the pipe as an arg, but it's a, umm, quirk of kgsl.. */
 int fd_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
 {
 	return bo->funcs->cpu_prep(bo, pipe, op);
 }

 void fd_bo_cpu_fini(struct fd_bo *bo)
 {
 	bo->funcs->cpu_fini(bo);
 }

 #ifndef HAVE_FREEDRENO_KGSL
 struct fd_bo * fd_bo_from_fbdev(struct fd_pipe *pipe, int fbfd, uint32_t size)
 {
     return NULL;
 }
 #endif
	/* -- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -- */

	/*
	* Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
	*
	* 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:
	* Rob Clark <robclark@freedesktop.org>
	*/

	#ifdef HAVE_CONFIG_H
	# include <config.h>
	#endif

	#include "freedreno_drmif.h"
	#include "freedreno_priv.h"

	static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;

	static void bo_del(struct fd_bo *bo);

	/* set buffer name, and add to table, call w/ table_lock held: */
	static void set_name(struct fd_bo *bo, uint32_t name)
	{
	bo->name = name;
	/* add ourself into the handle table: */
	drmHashInsert(bo->dev->name_table, name, bo);
	}

	/* lookup a buffer, call w/ table_lock held: */
	static struct fd_bo * lookup_bo(void *tbl, uint32_t key)
	{
	struct fd_bo *bo = NULL;
	if (!drmHashLookup(tbl, key, (void **)&bo)) {
	/* found, incr refcnt and return: */
	bo = fd_bo_ref(bo);

	/* don't break the bucket if this bo was found in one */
	list_delinit(&bo->list);
	}
	return bo;
	}

	/* allocate a new buffer object, call w/ table_lock held */
	static struct fd_bo * bo_from_handle(struct fd_device *dev,
	uint32_t size, uint32_t handle)
	{
	struct fd_bo *bo;

	bo = dev->funcs->bo_from_handle(dev, size, handle);
	if (!bo) {
	struct drm_gem_close req = {
	.handle = handle,
	};
	drmIoctl(dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
	return NULL;
	}
	bo->dev = fd_device_ref(dev);
	bo->size = size;
	bo->handle = handle;
	atomic_set(&bo->refcnt, 1);
	list_inithead(&bo->list);
	/* add ourself into the handle table: */
	drmHashInsert(dev->handle_table, handle, bo);
	return bo;
	}

	/* Frees older cached buffers. Called under table_lock */
	drm_private void fd_cleanup_bo_cache(struct fd_device *dev, time_t time)
	{
	int i;

	if (dev->time == time)
	return;

	for (i = 0; i < dev->num_buckets; i++) {
	struct fd_bo_bucket *bucket = &dev->cache_bucket[i];
	struct fd_bo *bo;

	while (!LIST_IS_EMPTY(&bucket->list)) {
	bo = LIST_ENTRY(struct fd_bo, bucket->list.next, list);

	/* keep things in cache for at least 1 second: */
	if (time && ((time - bo->free_time) <= 1))
	break;

	list_del(&bo->list);
	bo_del(bo);
	}
	}

	dev->time = time;
	}

	static struct fd_bo_bucket * get_bucket(struct fd_device *dev, uint32_t size)
	{
	int i;

	/* hmm, this is what intel does, but I suppose we could calculate our
	* way to the correct bucket size rather than looping..
	*/
	for (i = 0; i < dev->num_buckets; i++) {
	struct fd_bo_bucket *bucket = &dev->cache_bucket[i];
	if (bucket->size >= size) {
	return bucket;
	}
	}

	return NULL;
	}

	static int is_idle(struct fd_bo *bo)
	{
	return fd_bo_cpu_prep(bo, NULL,
	DRM_FREEDRENO_PREP_READ \|
	DRM_FREEDRENO_PREP_WRITE \|
	DRM_FREEDRENO_PREP_NOSYNC) == 0;
	}

	static struct fd_bo find_in_bucket(struct fd_device dev,
	struct fd_bo_bucket *bucket, uint32_t flags)
	{
	struct fd_bo *bo = NULL;

	/* TODO .. if we had an ALLOC_FOR_RENDER flag like intel, we could
	* skip the busy check.. if it is only going to be a render target
	* then we probably don't need to stall..
	*
	* NOTE that intel takes ALLOC_FOR_RENDER bo's from the list tail
	* (MRU, since likely to be in GPU cache), rather than head (LRU)..
	*/
	pthread_mutex_lock(&table_lock);
	while (!LIST_IS_EMPTY(&bucket->list)) {
	bo = LIST_ENTRY(struct fd_bo, bucket->list.next, list);
	if (0 /* TODO: if madvise tells us bo is gone... */) {
	list_del(&bo->list);
	bo_del(bo);
	bo = NULL;
	continue;
	}
	/* TODO check for compatible flags? */
	if (is_idle(bo)) {
	list_del(&bo->list);
	break;
	}
	bo = NULL;
	break;
	}
	pthread_mutex_unlock(&table_lock);

	return bo;
	}


	struct fd_bo *
	fd_bo_new(struct fd_device *dev, uint32_t size, uint32_t flags)
	{
	struct fd_bo *bo = NULL;
	struct fd_bo_bucket *bucket;
	uint32_t handle;
	int ret;

	size = ALIGN(size, 4096);
	bucket = get_bucket(dev, size);

	/* see if we can be green and recycle: */
	if (bucket) {
	size = bucket->size;
	bo = find_in_bucket(dev, bucket, flags);
	if (bo) {
	atomic_set(&bo->refcnt, 1);
	fd_device_ref(bo->dev);
	return bo;
	}
	}

	ret = dev->funcs->bo_new_handle(dev, size, flags, &handle);
	if (ret)
	return NULL;

	pthread_mutex_lock(&table_lock);
	bo = bo_from_handle(dev, size, handle);
	bo->bo_reuse = 1;
	pthread_mutex_unlock(&table_lock);

	return bo;
	}

	struct fd_bo *
	fd_bo_from_handle(struct fd_device *dev, uint32_t handle, uint32_t size)
	{
	struct fd_bo *bo = NULL;

	pthread_mutex_lock(&table_lock);

	bo = lookup_bo(dev->handle_table, handle);
	if (bo)
	goto out_unlock;

	bo = bo_from_handle(dev, size, handle);

	out_unlock:
	pthread_mutex_unlock(&table_lock);

	return bo;
	}

	struct fd_bo *
	fd_bo_from_dmabuf(struct fd_device *dev, int fd)
	{
	int ret, size;
	uint32_t handle;
	struct fd_bo *bo;

	pthread_mutex_lock(&table_lock);
	ret = drmPrimeFDToHandle(dev->fd, fd, &handle);
	if (ret) {
	return NULL;
	}

	bo = lookup_bo(dev->handle_table, handle);
	if (bo)
	goto out_unlock;

	/* lseek() to get bo size */
	size = lseek(fd, 0, SEEK_END);
	lseek(fd, 0, SEEK_CUR);

	bo = bo_from_handle(dev, size, handle);

	out_unlock:
	pthread_mutex_unlock(&table_lock);

	return bo;
	}

	struct fd_bo * fd_bo_from_name(struct fd_device *dev, uint32_t name)
	{
	struct drm_gem_open req = {
	.name = name,
	};
	struct fd_bo *bo;

	pthread_mutex_lock(&table_lock);

	/* check name table first, to see if bo is already open: */
	bo = lookup_bo(dev->name_table, name);
	if (bo)
	goto out_unlock;

	if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
	ERROR_MSG("gem-open failed: %s", strerror(errno));
	goto out_unlock;
	}

	bo = lookup_bo(dev->handle_table, req.handle);
	if (bo)
	goto out_unlock;

	bo = bo_from_handle(dev, req.size, req.handle);
	if (bo)
	set_name(bo, name);

	out_unlock:
	pthread_mutex_unlock(&table_lock);

	return bo;
	}

	struct fd_bo * fd_bo_ref(struct fd_bo *bo)
	{
	atomic_inc(&bo->refcnt);
	return bo;
	}

	void fd_bo_del(struct fd_bo *bo)
	{
	struct fd_device *dev = bo->dev;

	if (!atomic_dec_and_test(&bo->refcnt))
	return;

	pthread_mutex_lock(&table_lock);

	if (bo->bo_reuse) {
	struct fd_bo_bucket *bucket = get_bucket(dev, bo->size);

	/* see if we can be green and recycle: */
	if (bucket) {
	struct timespec time;

	clock_gettime(CLOCK_MONOTONIC, &time);

	bo->free_time = time.tv_sec;
	list_addtail(&bo->list, &bucket->list);
	fd_cleanup_bo_cache(dev, time.tv_sec);

	/* bo's in the bucket cache don't have a ref and
	* don't hold a ref to the dev:
	*/

	goto out;
	}
	}

	bo_del(bo);
	out:
	fd_device_del_locked(dev);
	pthread_mutex_unlock(&table_lock);
	}

	/* Called under table_lock */
	static void bo_del(struct fd_bo *bo)
	{
	if (bo->map)
	drm_munmap(bo->map, bo->size);

	/* TODO probably bo's in bucket list get removed from
	* handle table??
	*/

	if (bo->handle) {
	struct drm_gem_close req = {
	.handle = bo->handle,
	};
	drmHashDelete(bo->dev->handle_table, bo->handle);
	if (bo->name)
	drmHashDelete(bo->dev->name_table, bo->name);
	drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
	}

	bo->funcs->destroy(bo);
	}

	int fd_bo_get_name(struct fd_bo bo, uint32_t name)
	{
	if (!bo->name) {
	struct drm_gem_flink req = {
	.handle = bo->handle,
	};
	int ret;

	ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
	if (ret) {
	return ret;
	}

	pthread_mutex_lock(&table_lock);
	set_name(bo, req.name);
	pthread_mutex_unlock(&table_lock);
	bo->bo_reuse = 0;
	}

	*name = bo->name;

	return 0;
	}

	uint32_t fd_bo_handle(struct fd_bo *bo)
	{
	return bo->handle;
	}

	int fd_bo_dmabuf(struct fd_bo *bo)
	{
	int ret, prime_fd;

	ret = drmPrimeHandleToFD(bo->dev->fd, bo->handle, DRM_CLOEXEC,
	&prime_fd);
	if (ret) {
	ERROR_MSG("failed to get dmabuf fd: %d", ret);
	return ret;
	}

	bo->bo_reuse = 0;

	return prime_fd;
	}

	uint32_t fd_bo_size(struct fd_bo *bo)
	{
	return bo->size;
	}

	void * fd_bo_map(struct fd_bo *bo)
	{
	if (!bo->map) {
	uint64_t offset;
	int ret;

	ret = bo->funcs->offset(bo, &offset);
	if (ret) {
	return NULL;
	}

	bo->map = drm_mmap(0, bo->size, PROT_READ \| PROT_WRITE, MAP_SHARED,
	bo->dev->fd, offset);
	if (bo->map == MAP_FAILED) {
	ERROR_MSG("mmap failed: %s", strerror(errno));
	bo->map = NULL;
	}
	}
	return bo->map;
	}

	/* a bit odd to take the pipe as an arg, but it's a, umm, quirk of kgsl.. */
	int fd_bo_cpu_prep(struct fd_bo bo, struct fd_pipe pipe, uint32_t op)
	{
	return bo->funcs->cpu_prep(bo, pipe, op);
	}

	void fd_bo_cpu_fini(struct fd_bo *bo)
	{
	bo->funcs->cpu_fini(bo);
	}

	#ifndef HAVE_FREEDRENO_KGSL
	struct fd_bo * fd_bo_from_fbdev(struct fd_pipe *pipe, int fbfd, uint32_t size)
	{
	return NULL;
	}
	#endif