[PATCH] drm: base prime/dma-buf support
daeinki at gmail.com
daeinki at gmail.com
Mon Mar 26 08:45:54 PDT 2012
Reviewed-by: Inki Dae <inki.dae at samsung.com>
2012. 3. 27. 오전 12:02 Dave Airlie <airlied at gmail.com> 작성:
> From: Dave Airlie <airlied at redhat.com>
>
> This adds the basic drm dma-buf interface layer, called PRIME,
>
> The main APIs exposed to userspace allow translating a 32-bit object handle
> to a file descriptor, and a file descriptor to a 32-bit object handle.
>
> The flags value is currently limited to O_CLOEXEC.
>
> Acknowledgements:
> Daniel Vetter: lots of review
> Rob Clark: cleaned up lots of the internals and did lifetime review.
>
> This is what I intend to send to Linus to form the basis for prime work
> in the drivers.
>
> Signed-off-by: Dave Airlie <airlied at redhat.com>
> ---
> drivers/gpu/drm/Kconfig | 1 +
> drivers/gpu/drm/Makefile | 2 +-
> drivers/gpu/drm/drm_drv.c | 4 +
> drivers/gpu/drm/drm_fops.c | 7 +
> drivers/gpu/drm/drm_gem.c | 9 ++
> drivers/gpu/drm/drm_prime.c | 281 +++++++++++++++++++++++++++++++++++++++++++
> include/drm/drm.h | 14 ++-
> include/drm/drmP.h | 61 ++++++++++
> 8 files changed, 377 insertions(+), 2 deletions(-)
> create mode 100644 drivers/gpu/drm/drm_prime.c
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index cc11488..e354bc0 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -9,6 +9,7 @@ menuconfig DRM
> depends on (AGP || AGP=n) && !EMULATED_CMPXCHG && MMU
> select I2C
> select I2C_ALGOBIT
> + select DMA_SHARED_BUFFER
> help
> Kernel-level support for the Direct Rendering Infrastructure (DRI)
> introduced in XFree86 4.0. If you say Y here, you need to select
> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> index a858532..c20da5b 100644
> --- a/drivers/gpu/drm/Makefile
> +++ b/drivers/gpu/drm/Makefile
> @@ -12,7 +12,7 @@ drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \
> drm_platform.o drm_sysfs.o drm_hashtab.o drm_mm.o \
> drm_crtc.o drm_modes.o drm_edid.o \
> drm_info.o drm_debugfs.o drm_encoder_slave.o \
> - drm_trace_points.o drm_global.o
> + drm_trace_points.o drm_global.o drm_prime.o
>
> drm-$(CONFIG_COMPAT) += drm_ioc32.o
>
> diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
> index 0b65fbc..6116e3b 100644
> --- a/drivers/gpu/drm/drm_drv.c
> +++ b/drivers/gpu/drm/drm_drv.c
> @@ -136,6 +136,10 @@ static struct drm_ioctl_desc drm_ioctls[] = {
> DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
>
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> +
> + DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED),
> + DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED),
> +
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
> index 7348a3d..cdfbf27 100644
> --- a/drivers/gpu/drm/drm_fops.c
> +++ b/drivers/gpu/drm/drm_fops.c
> @@ -271,6 +271,9 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
> if (dev->driver->driver_features & DRIVER_GEM)
> drm_gem_open(dev, priv);
>
> + if (drm_core_check_feature(dev, DRIVER_PRIME))
> + drm_prime_init_file_private(&priv->prime);
> +
> if (dev->driver->open) {
> ret = dev->driver->open(dev, priv);
> if (ret < 0)
> @@ -571,6 +574,10 @@ int drm_release(struct inode *inode, struct file *filp)
>
> if (dev->driver->postclose)
> dev->driver->postclose(dev, file_priv);
> +
> + if (drm_core_check_feature(dev, DRIVER_PRIME))
> + drm_prime_destroy_file_private(&file_priv->prime);
> +
> kfree(file_priv);
>
> /* ========================================================
> diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
> index 0ef358e..f337497 100644
> --- a/drivers/gpu/drm/drm_gem.c
> +++ b/drivers/gpu/drm/drm_gem.c
> @@ -35,6 +35,7 @@
> #include <linux/mman.h>
> #include <linux/pagemap.h>
> #include <linux/shmem_fs.h>
> +#include <linux/dma-buf.h>
> #include "drmP.h"
>
> /** @file drm_gem.c
> @@ -232,6 +233,10 @@ drm_gem_handle_delete(struct drm_file *filp, u32 handle)
> idr_remove(&filp->object_idr, handle);
> spin_unlock(&filp->table_lock);
>
> + if (obj->import_attach)
> + drm_prime_remove_fd_handle_mapping(&filp->prime,
> + obj->import_attach->dmabuf);
> +
> if (dev->driver->gem_close_object)
> dev->driver->gem_close_object(obj, filp);
> drm_gem_object_handle_unreference_unlocked(obj);
> @@ -527,6 +532,10 @@ drm_gem_object_release_handle(int id, void *ptr, void *data)
> struct drm_gem_object *obj = ptr;
> struct drm_device *dev = obj->dev;
>
> + if (obj->import_attach)
> + drm_prime_remove_fd_handle_mapping(&file_priv->prime,
> + obj->import_attach->dmabuf);
> +
> if (dev->driver->gem_close_object)
> dev->driver->gem_close_object(obj, file_priv);
>
> diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
> new file mode 100644
> index 0000000..1c7f057
> --- /dev/null
> +++ b/drivers/gpu/drm/drm_prime.c
> @@ -0,0 +1,281 @@
> +/*
> + * Copyright © 2012 Red Hat
> + *
> + * 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:
> + * Dave Airlie <airlied at redhat.com>
> + * Rob Clark
> + *
> + */
> +
> +#include <linux/export.h>
> +#include <linux/dma-buf.h>
> +#include "drmP.h"
> +
> +/*
> + * DMA-BUF/GEM Object references and lifetime overview:
> + *
> + * On the export the dma_buf holds a reference to the exporting GEM
> + * object. It takes this reference in handle_to_fd_ioctl, when it
> + * first calls .prime_export and stores the exporting GEM object in
> + * the dma_buf priv. This reference is released when the dma_buf
> + * object goes away in the driver .release function.
> + *
> + * On the import the importing GEM object holds a reference to the
> + * dma_buf (which in turn holds a ref to the exporting GEM object).
> + * It takes that reference in the fd_to_handle ioctl.
> + * It calls dma_buf_get, creates an attachment to it and stores the
> + * attachment in the GEM object. When this attachment is destroyed
> + * when the imported object is destroyed, we remove the attachment
> + * and drop the reference to the dma_buf.
> + *
> + * Thus the chain of references always flows in one direction
> + * (avoiding loops): importing_gem -> dmabuf -> exporting_gem
> + */
> +
> +struct drm_prime_member {
> + struct list_head entry;
> + struct dma_buf *dma_buf;
> + uint32_t handle;
> +};
> +
> +int drm_gem_prime_handle_to_fd(struct drm_device *dev,
> + struct drm_file *file_priv, uint32_t handle, uint32_t flags,
> + int *prime_fd)
> +{
> + struct drm_gem_object *obj;
> +
> + obj = drm_gem_object_lookup(dev, file_priv, handle);
> + if (!obj)
> + return -ENOENT;
> +
> + /* don't allow imported buffers to be re-exported */
> + if (obj->import_attach) {
> + drm_gem_object_unreference_unlocked(obj);
> + return -EINVAL;
> + }
> +
> + if (obj->export_dma_buf) {
> + get_file(obj->export_dma_buf->file);
> + *prime_fd = dma_buf_fd(obj->export_dma_buf, flags);
> + drm_gem_object_unreference_unlocked(obj);
> + } else {
> + obj->export_dma_buf =
> + dev->driver->gem_prime_export(dev, obj, flags);
> + if (IS_ERR_OR_NULL(obj->export_dma_buf)) {
> + /* normally the created dma-buf takes ownership of the ref,
> + * but if that fails then drop the ref
> + */
> + drm_gem_object_unreference_unlocked(obj);
> + return PTR_ERR(obj->export_dma_buf);
> + }
> + *prime_fd = dma_buf_fd(obj->export_dma_buf, flags);
> + }
> + return 0;
> +}
> +EXPORT_SYMBOL(drm_gem_prime_handle_to_fd);
> +
> +int drm_gem_prime_fd_to_handle(struct drm_device *dev,
> + struct drm_file *file_priv, int prime_fd, uint32_t *handle)
> +{
> + struct dma_buf *dma_buf;
> + struct drm_gem_object *obj;
> + int ret;
> +
> + dma_buf = dma_buf_get(prime_fd);
> + if (IS_ERR(dma_buf))
> + return PTR_ERR(dma_buf);
> +
> + ret = drm_prime_lookup_fd_handle_mapping(&file_priv->prime,
> + dma_buf, handle);
> + if (!ret) {
> + dma_buf_put(dma_buf);
> + return 0;
> + }
> +
> + /* never seen this one, need to import */
> + obj = dev->driver->gem_prime_import(dev, dma_buf);
> + if (IS_ERR_OR_NULL(obj)) {
> + ret = PTR_ERR(obj);
> + goto fail_put;
> + }
> +
> + ret = drm_gem_handle_create(file_priv, obj, handle);
> + drm_gem_object_unreference_unlocked(obj);
> + if (ret)
> + goto fail_put;
> +
> + ret = drm_prime_insert_fd_handle_mapping(&file_priv->prime,
> + dma_buf, *handle);
> + if (ret)
> + goto fail;
> +
> + return 0;
> +
> +fail:
> + /* hmm, if driver attached, we are relying on the free-object path
> + * to detach.. which seems ok..
> + */
> + drm_gem_object_handle_unreference_unlocked(obj);
> +fail_put:
> + dma_buf_put(dma_buf);
> + return ret;
> +}
> +EXPORT_SYMBOL(drm_gem_prime_fd_to_handle);
> +
> +int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
> + struct drm_file *file_priv)
> +{
> + struct drm_prime_handle *args = data;
> + uint32_t flags;
> +
> + if (!drm_core_check_feature(dev, DRIVER_PRIME))
> + return -EINVAL;
> +
> + if (!dev->driver->prime_handle_to_fd)
> + return -ENOSYS;
> +
> + /* we only want to pass DRM_CLOEXEC which is == O_CLOEXEC */
> + flags = args->flags & DRM_CLOEXEC;
> +
> + return dev->driver->prime_handle_to_fd(dev, file_priv,
> + args->handle, flags, &args->fd);
> +}
> +
> +int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
> + struct drm_file *file_priv)
> +{
> + struct drm_prime_handle *args = data;
> +
> + if (!drm_core_check_feature(dev, DRIVER_PRIME))
> + return -EINVAL;
> +
> + if (!dev->driver->prime_fd_to_handle)
> + return -ENOSYS;
> +
> + return dev->driver->prime_fd_to_handle(dev, file_priv,
> + args->fd, &args->handle);
> +}
> +
> +/*
> + * drm_prime_pages_to_sg
> + *
> + * this helper creates an sg table object from a set of pages
> + * the driver is responsible for mapping the pages into the
> + * importers address space
> + */
> +struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages)
> +{
> + struct sg_table *sg = NULL;
> + struct scatterlist *iter;
> + int i;
> + int ret;
> +
> + sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
> + if (!sg)
> + goto out;
> +
> + ret = sg_alloc_table(sg, nr_pages, GFP_KERNEL);
> + if (ret)
> + goto out;
> +
> + for_each_sg(sg->sgl, iter, nr_pages, i)
> + sg_set_page(iter, pages[i], PAGE_SIZE, 0);
> +
> + return sg;
> +out:
> + kfree(sg);
> + return NULL;
> +}
> +EXPORT_SYMBOL(drm_prime_pages_to_sg);
> +
> +/* helper function to cleanup a GEM/prime object */
> +void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg)
> +{
> + struct dma_buf_attachment *attach;
> + struct dma_buf *dma_buf;
> + attach = obj->import_attach;
> + if (sg)
> + dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL);
> + dma_buf = attach->dmabuf;
> + dma_buf_detach(attach->dmabuf, attach);
> + /* remove the reference */
> + dma_buf_put(dma_buf);
> +}
> +EXPORT_SYMBOL(drm_prime_gem_destroy);
> +
> +void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv)
> +{
> + INIT_LIST_HEAD(&prime_fpriv->head);
> +}
> +EXPORT_SYMBOL(drm_prime_init_file_private);
> +
> +void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv)
> +{
> + struct drm_prime_member *member, *safe;
> + list_for_each_entry_safe(member, safe, &prime_fpriv->head, entry) {
> + list_del(&member->entry);
> + kfree(member);
> + }
> +}
> +EXPORT_SYMBOL(drm_prime_destroy_file_private);
> +
> +int drm_prime_insert_fd_handle_mapping(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t handle)
> +{
> + struct drm_prime_member *member;
> +
> + member = kmalloc(sizeof(*member), GFP_KERNEL);
> + if (!member)
> + return -ENOMEM;
> +
> + member->dma_buf = dma_buf;
> + member->handle = handle;
> + list_add(&member->entry, &prime_fpriv->head);
> + return 0;
> +}
> +EXPORT_SYMBOL(drm_prime_insert_fd_handle_mapping);
> +
> +int drm_prime_lookup_fd_handle_mapping(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle)
> +{
> + struct drm_prime_member *member;
> +
> + list_for_each_entry(member, &prime_fpriv->head, entry) {
> + if (member->dma_buf == dma_buf) {
> + *handle = member->handle;
> + return 0;
> + }
> + }
> + return -ENOENT;
> +}
> +EXPORT_SYMBOL(drm_prime_lookup_fd_handle_mapping);
> +
> +void drm_prime_remove_fd_handle_mapping(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf)
> +{
> + struct drm_prime_member *member, *safe;
> +
> + list_for_each_entry_safe(member, safe, &prime_fpriv->head, entry) {
> + if (member->dma_buf == dma_buf) {
> + list_del(&member->entry);
> + kfree(member);
> + }
> + }
> +}
> +EXPORT_SYMBOL(drm_prime_remove_fd_handle_mapping);
> diff --git a/include/drm/drm.h b/include/drm/drm.h
> index 34a7b89..64ff02d 100644
> --- a/include/drm/drm.h
> +++ b/include/drm/drm.h
> @@ -617,6 +617,17 @@ struct drm_get_cap {
> __u64 value;
> };
>
> +#define DRM_CLOEXEC O_CLOEXEC
> +struct drm_prime_handle {
> + __u32 handle;
> +
> + /** Flags.. only applicable for handle->fd */
> + __u32 flags;
> +
> + /** Returned dmabuf file descriptor */
> + __s32 fd;
> +};
> +
> #include "drm_mode.h"
>
> #define DRM_IOCTL_BASE 'd'
> @@ -673,7 +684,8 @@ struct drm_get_cap {
> #define DRM_IOCTL_UNLOCK DRM_IOW( 0x2b, struct drm_lock)
> #define DRM_IOCTL_FINISH DRM_IOW( 0x2c, struct drm_lock)
>
> -#define DRM_IOCTL_GEM_PRIME_OPEN DRM_IOWR(0x2e, struct drm_gem_open)
> +#define DRM_IOCTL_PRIME_HANDLE_TO_FD DRM_IOWR(0x2d, struct drm_prime_handle)
> +#define DRM_IOCTL_PRIME_FD_TO_HANDLE DRM_IOWR(0x2e, struct drm_prime_handle)
>
> #define DRM_IOCTL_AGP_ACQUIRE DRM_IO( 0x30)
> #define DRM_IOCTL_AGP_RELEASE DRM_IO( 0x31)
> diff --git a/include/drm/drmP.h b/include/drm/drmP.h
> index 574bd1c..f1e9c89 100644
> --- a/include/drm/drmP.h
> +++ b/include/drm/drmP.h
> @@ -91,6 +91,7 @@ struct drm_device;
> #define DRM_UT_CORE 0x01
> #define DRM_UT_DRIVER 0x02
> #define DRM_UT_KMS 0x04
> +#define DRM_UT_PRIME 0x08
> /*
> * Three debug levels are defined.
> * drm_core, drm_driver, drm_kms
> @@ -150,6 +151,7 @@ int drm_err(const char *func, const char *format, ...);
> #define DRIVER_IRQ_VBL2 0x800
> #define DRIVER_GEM 0x1000
> #define DRIVER_MODESET 0x2000
> +#define DRIVER_PRIME 0x4000
>
> #define DRIVER_BUS_PCI 0x1
> #define DRIVER_BUS_PLATFORM 0x2
> @@ -215,6 +217,11 @@ int drm_err(const char *func, const char *format, ...);
> drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME, \
> __func__, fmt, ##args); \
> } while (0)
> +#define DRM_DEBUG_PRIME(fmt, args...) \
> + do { \
> + drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME, \
> + __func__, fmt, ##args); \
> + } while (0)
> #define DRM_LOG(fmt, args...) \
> do { \
> drm_ut_debug_printk(DRM_UT_CORE, NULL, \
> @@ -238,6 +245,7 @@ int drm_err(const char *func, const char *format, ...);
> #else
> #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
> #define DRM_DEBUG_KMS(fmt, args...) do { } while (0)
> +#define DRM_DEBUG_PRIME(fmt, args...) do { } while (0)
> #define DRM_DEBUG(fmt, arg...) do { } while (0)
> #define DRM_LOG(fmt, arg...) do { } while (0)
> #define DRM_LOG_KMS(fmt, args...) do { } while (0)
> @@ -410,6 +418,11 @@ struct drm_pending_event {
> void (*destroy)(struct drm_pending_event *event);
> };
>
> +/* initial implementaton using a linked list - todo hashtab */
> +struct drm_prime_file_private {
> + struct list_head head;
> +};
> +
> /** File private data */
> struct drm_file {
> int authenticated;
> @@ -437,6 +450,8 @@ struct drm_file {
> wait_queue_head_t event_wait;
> struct list_head event_list;
> int event_space;
> +
> + struct drm_prime_file_private prime;
> };
>
> /** Wait queue */
> @@ -652,6 +667,12 @@ struct drm_gem_object {
> uint32_t pending_write_domain;
>
> void *driver_private;
> +
> + /* dma buf exported from this GEM object */
> + struct dma_buf *export_dma_buf;
> +
> + /* dma buf attachment backing this object */
> + struct dma_buf_attachment *import_attach;
> };
>
> #include "drm_crtc.h"
> @@ -890,6 +911,20 @@ struct drm_driver {
> int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
> void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
>
> + /* prime: */
> + /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
> + int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
> + uint32_t handle, uint32_t flags, int *prime_fd);
> + /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
> + int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
> + int prime_fd, uint32_t *handle);
> + /* export GEM -> dmabuf */
> + struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
> + struct drm_gem_object *obj, int flags);
> + /* import dmabuf -> GEM */
> + struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
> + struct dma_buf *dma_buf);
> +
> /* vga arb irq handler */
> void (*vgaarb_irq)(struct drm_device *dev, bool state);
>
> @@ -1509,6 +1544,32 @@ extern int drm_vblank_info(struct seq_file *m, void *data);
> extern int drm_clients_info(struct seq_file *m, void* data);
> extern int drm_gem_name_info(struct seq_file *m, void *data);
>
> +
> +extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
> + struct drm_file *file_priv, uint32_t handle, uint32_t flags,
> + int *prime_fd);
> +extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
> + struct drm_file *file_priv, int prime_fd, uint32_t *handle);
> +
> +extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
> + struct drm_file *file_priv);
> +extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
> + struct drm_file *file_priv);
> +
> +extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
> +extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
> +
> +
> +void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
> +void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
> +int drm_prime_insert_fd_handle_mapping(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t handle);
> +int drm_prime_lookup_fd_handle_mapping(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle);
> +void drm_prime_remove_fd_handle_mapping(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
> +
> +int drm_prime_add_dma_buf(struct drm_device *dev, struct drm_gem_object *obj);
> +int drm_prime_lookup_obj(struct drm_device *dev, struct dma_buf *buf,
> + struct drm_gem_object **obj);
> +
> #if DRM_DEBUG_CODE
> extern int drm_vma_info(struct seq_file *m, void *data);
> #endif
> --
> 1.7.7.6
>
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