[PATCH 1/2] drm/prime: Shuffle functions.

Daniel Vetter
2019-06-18T09:20:49Z

Reorder all the functions in drm_prime.[hc] into three groups: core,
export helpers, import helpers.

Not other changes beyond moving the functions and their unchanged
kerneldoc around in here.

Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Eric Anholt <eric@anholt.net>
Cc: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
drivers/gpu/drm/drm_prime.c | 770 ++++++++++++++++++------------------
include/drm/drm_prime.h | 42 +-
2 files changed, 409 insertions(+), 403 deletions(-)

diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index d0c01318076b..68b4de85370c 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -181,42 +181,6 @@ static int drm_prime_lookup_buf_handle(struct drm_prime_file_private *prime_fpri
return -ENOENT;
}

-/**
- * drm_gem_map_attach - dma_buf attach implementation for GEM
- * @dma_buf: buffer to attach device to
- * @attach: buffer attachment data
- *
- * Calls &drm_driver.gem_prime_pin for device specific handling. This can be
- * used as the &dma_buf_ops.attach callback.
- *
- * Returns 0 on success, negative error code on failure.
- */
-int drm_gem_map_attach(struct dma_buf *dma_buf,
- struct dma_buf_attachment *attach)
-{
- struct drm_gem_object *obj = dma_buf->priv;
-
- return drm_gem_pin(obj);
-}
-EXPORT_SYMBOL(drm_gem_map_attach);
-
-/**
- * drm_gem_map_detach - dma_buf detach implementation for GEM
- * @dma_buf: buffer to detach from
- * @attach: attachment to be detached
- *
- * Cleans up &dma_buf_attachment. This can be used as the &dma_buf_ops.detach
- * callback.
- */
-void drm_gem_map_detach(struct dma_buf *dma_buf,
- struct dma_buf_attachment *attach)
-{
- struct drm_gem_object *obj = dma_buf->priv;
-
- drm_gem_unpin(obj);
-}
-EXPORT_SYMBOL(drm_gem_map_detach);
-
void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv,
struct dma_buf *dma_buf)
{
@@ -242,64 +206,18 @@ void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpr
}
}

-/**
- * drm_gem_map_dma_buf - map_dma_buf implementation for GEM
- * @attach: attachment whose scatterlist is to be returned
- * @dir: direction of DMA transfer
- *
- * Calls &drm_driver.gem_prime_get_sg_table and then maps the scatterlist. This
- * can be used as the &dma_buf_ops.map_dma_buf callback.
- *
- * Returns sg_table containing the scatterlist to be returned; returns ERR_PTR
- * on error. May return -EINTR if it is interrupted by a signal.
- */
-
-struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
- enum dma_data_direction dir)
+void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv)
{
- struct drm_gem_object *obj = attach->dmabuf->priv;
- struct sg_table *sgt;
-
- if (WARN_ON(dir == DMA_NONE))
- return ERR_PTR(-EINVAL);
-
- if (obj->funcs)
- sgt = obj->funcs->get_sg_table(obj);
- else
- sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
-
- if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
- DMA_ATTR_SKIP_CPU_SYNC)) {
- sg_free_table(sgt);
- kfree(sgt);
- sgt = ERR_PTR(-ENOMEM);
- }
-
- return sgt;
+ mutex_init(&prime_fpriv->lock);
+ prime_fpriv->dmabufs = RB_ROOT;
+ prime_fpriv->handles = RB_ROOT;
}
-EXPORT_SYMBOL(drm_gem_map_dma_buf);

-/**
- * drm_gem_unmap_dma_buf - unmap_dma_buf implementation for GEM
- * @attach: attachment to unmap buffer from
- * @sgt: scatterlist info of the buffer to unmap
- * @dir: direction of DMA transfer
- *
- * This can be used as the &dma_buf_ops.unmap_dma_buf callback.
- */
-void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
- struct sg_table *sgt,
- enum dma_data_direction dir)
+void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv)
{
- if (!sgt)
- return;
-
- dma_unmap_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
- DMA_ATTR_SKIP_CPU_SYNC);
- sg_free_table(sgt);
- kfree(sgt);
+ /* by now drm_gem_release should've made sure the list is empty */
+ WARN_ON(!RB_EMPTY_ROOT(&prime_fpriv->dmabufs));
}
-EXPORT_SYMBOL(drm_gem_unmap_dma_buf);

/**
* drm_gem_dmabuf_export - dma_buf export implementation for GEM
@@ -351,128 +269,101 @@ void drm_gem_dmabuf_release(struct dma_buf *dma_buf)
EXPORT_SYMBOL(drm_gem_dmabuf_release);

/**
- * drm_gem_dmabuf_vmap - dma_buf vmap implementation for GEM
- * @dma_buf: buffer to be mapped
- *
- * Sets up a kernel virtual mapping. This can be used as the &dma_buf_ops.vmap
- * callback.
+ * drm_gem_prime_fd_to_handle - PRIME import function for GEM drivers
+ * @dev: dev to export the buffer from
+ * @file_priv: drm file-private structure
+ * @prime_fd: fd id of the dma-buf which should be imported
+ * @handle: pointer to storage for the handle of the imported buffer object
*
- * Returns the kernel virtual address.
+ * This is the PRIME import function which must be used mandatorily by GEM
+ * drivers to ensure correct lifetime management of the underlying GEM object.
+ * The actual importing of GEM object from the dma-buf is done through the
+ * gem_import_export driver callback.
*/
-void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf)
+int drm_gem_prime_fd_to_handle(struct drm_device *dev,
+ struct drm_file *file_priv, int prime_fd,
+ uint32_t *handle)
{
- struct drm_gem_object *obj = dma_buf->priv;
- void *vaddr;
+ struct dma_buf *dma_buf;
+ struct drm_gem_object *obj;
+ int ret;

- vaddr = drm_gem_vmap(obj);
- if (IS_ERR(vaddr))
- vaddr = NULL;
+ dma_buf = dma_buf_get(prime_fd);
+ if (IS_ERR(dma_buf))
+ return PTR_ERR(dma_buf);

- return vaddr;
-}
-EXPORT_SYMBOL(drm_gem_dmabuf_vmap);
+ mutex_lock(&file_priv->prime.lock);

-/**
- * drm_gem_dmabuf_vunmap - dma_buf vunmap implementation for GEM
- * @dma_buf: buffer to be unmapped
- * @vaddr: the virtual address of the buffer
- *
- * Releases a kernel virtual mapping. This can be used as the
- * &dma_buf_ops.vunmap callback.
- */
-void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
-{
- struct drm_gem_object *obj = dma_buf->priv;
+ ret = drm_prime_lookup_buf_handle(&file_priv->prime,
+ dma_buf, handle);
+ if (ret == 0)
+ goto out_put;

- drm_gem_vunmap(obj, vaddr);
-}
-EXPORT_SYMBOL(drm_gem_dmabuf_vunmap);
+ /* never seen this one, need to import */
+ mutex_lock(&dev->object_name_lock);
+ if (dev->driver->gem_prime_import)
+ obj = dev->driver->gem_prime_import(dev, dma_buf);
+ else
+ obj = drm_gem_prime_import(dev, dma_buf);
+ if (IS_ERR(obj)) {
+ ret = PTR_ERR(obj);
+ goto out_unlock;
+ }

-/**
- * drm_gem_dmabuf_mmap - dma_buf mmap implementation for GEM
- * @dma_buf: buffer to be mapped
- * @vma: virtual address range
- *
- * Provides memory mapping for the buffer. This can be used as the
- * &dma_buf_ops.mmap callback.
- *
- * Returns 0 on success or a negative error code on failure.
- */
-int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma)
-{
- struct drm_gem_object *obj = dma_buf->priv;
- struct drm_device *dev = obj->dev;
+ if (obj->dma_buf) {
+ WARN_ON(obj->dma_buf != dma_buf);
+ } else {
+ obj->dma_buf = dma_buf;
+ get_dma_buf(dma_buf);
+ }

- if (!dev->driver->gem_prime_mmap)
- return -ENOSYS;
+ /* _handle_create_tail unconditionally unlocks dev->object_name_lock. */
+ ret = drm_gem_handle_create_tail(file_priv, obj, handle);
+ drm_gem_object_put_unlocked(obj);
+ if (ret)
+ goto out_put;

- return dev->driver->gem_prime_mmap(obj, vma);
-}
-EXPORT_SYMBOL(drm_gem_dmabuf_mmap);
+ ret = drm_prime_add_buf_handle(&file_priv->prime,
+ dma_buf, *handle);
+ mutex_unlock(&file_priv->prime.lock);
+ if (ret)
+ goto fail;

-static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = {
- .cache_sgt_mapping = true,
- .attach = drm_gem_map_attach,
- .detach = drm_gem_map_detach,
- .map_dma_buf = drm_gem_map_dma_buf,
- .unmap_dma_buf = drm_gem_unmap_dma_buf,
- .release = drm_gem_dmabuf_release,
- .mmap = drm_gem_dmabuf_mmap,
- .vmap = drm_gem_dmabuf_vmap,
- .vunmap = drm_gem_dmabuf_vunmap,
-};
+ dma_buf_put(dma_buf);

-/**
- * DOC: PRIME Helpers
- *
- * Drivers can implement @gem_prime_export and @gem_prime_import in terms of
- * simpler APIs by using the helper functions @drm_gem_prime_export and
- * @drm_gem_prime_import. These functions implement dma-buf support in terms of
- * six lower-level driver callbacks:
- *
- * Export callbacks:
- *
- * * @gem_prime_pin (optional): prepare a GEM object for exporting
- * * @gem_prime_get_sg_table: provide a scatter/gather table of pinned pages
- * * @gem_prime_vmap: vmap a buffer exported by your driver
- * * @gem_prime_vunmap: vunmap a buffer exported by your driver
- * * @gem_prime_mmap (optional): mmap a buffer exported by your driver
- *
- * Import callback:
- *
- * * @gem_prime_import_sg_table (import): produce a GEM object from another
- * driver's scatter/gather table
- */
+ return 0;

-/**
- * drm_gem_prime_export - helper library implementation of the export callback
- * @dev: drm_device to export from
- * @obj: GEM object to export
- * @flags: flags like DRM_CLOEXEC and DRM_RDWR
- *
- * This is the implementation of the gem_prime_export functions for GEM drivers
- * using the PRIME helpers.
- */
-struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
- struct drm_gem_object *obj,
- int flags)
+fail:
+ /* hmm, if driver attached, we are relying on the free-object path
+ * to detach.. which seems ok..
+ */
+ drm_gem_handle_delete(file_priv, *handle);
+ dma_buf_put(dma_buf);
+ return ret;
+
+out_unlock:
+ mutex_unlock(&dev->object_name_lock);
+out_put:
+ mutex_unlock(&file_priv->prime.lock);
+ dma_buf_put(dma_buf);
+ return ret;
+}
+EXPORT_SYMBOL(drm_gem_prime_fd_to_handle);
+
+int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
{
- struct dma_buf_export_info exp_info = {
- .exp_name = KBUILD_MODNAME, /* white lie for debug */
- .owner = dev->driver->fops->owner,
- .ops = &drm_gem_prime_dmabuf_ops,
- .size = obj->size,
- .flags = flags,
- .priv = obj,
- .resv = obj->resv,
- };
+ struct drm_prime_handle *args = data;

- if (dev->driver->gem_prime_res_obj)
- exp_info.resv = dev->driver->gem_prime_res_obj(obj);
+ if (!drm_core_check_feature(dev, DRIVER_PRIME))
+ return -EOPNOTSUPP;

- return drm_gem_dmabuf_export(dev, &exp_info);
+ if (!dev->driver->prime_fd_to_handle)
+ return -ENOSYS;
+
+ return dev->driver->prime_fd_to_handle(dev, file_priv,
+ args->fd, &args->handle);
}
-EXPORT_SYMBOL(drm_gem_prime_export);

static struct dma_buf *export_and_register_object(struct drm_device *dev,
struct drm_gem_object *obj,
@@ -606,55 +497,325 @@ int drm_gem_prime_handle_to_fd(struct drm_device *dev,
out_unlock:
mutex_unlock(&file_priv->prime.lock);

- return ret;
+ return ret;
+}
+EXPORT_SYMBOL(drm_gem_prime_handle_to_fd);
+
+int drm_prime_handle_to_fd_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 -EOPNOTSUPP;
+
+ if (!dev->driver->prime_handle_to_fd)
+ return -ENOSYS;
+
+ /* check flags are valid */
+ if (args->flags & ~(DRM_CLOEXEC | DRM_RDWR))
+ return -EINVAL;
+
+ return dev->driver->prime_handle_to_fd(dev, file_priv,
+ args->handle, args->flags, &args->fd);
+}
+
+/**
+ * DOC: PRIME Helpers
+ *
+ * Drivers can implement @gem_prime_export and @gem_prime_import in terms of
+ * simpler APIs by using the helper functions @drm_gem_prime_export and
+ * @drm_gem_prime_import. These functions implement dma-buf support in terms of
+ * six lower-level driver callbacks:
+ *
+ * Export callbacks:
+ *
+ * * @gem_prime_pin (optional): prepare a GEM object for exporting
+ * * @gem_prime_get_sg_table: provide a scatter/gather table of pinned pages
+ * * @gem_prime_vmap: vmap a buffer exported by your driver
+ * * @gem_prime_vunmap: vunmap a buffer exported by your driver
+ * * @gem_prime_mmap (optional): mmap a buffer exported by your driver
+ *
+ * Import callback:
+ *
+ * * @gem_prime_import_sg_table (import): produce a GEM object from another
+ * driver's scatter/gather table
+ */
+
+/**
+ * drm_gem_map_attach - dma_buf attach implementation for GEM
+ * @dma_buf: buffer to attach device to
+ * @attach: buffer attachment data
+ *
+ * Calls &drm_driver.gem_prime_pin for device specific handling. This can be
+ * used as the &dma_buf_ops.attach callback.
+ *
+ * Returns 0 on success, negative error code on failure.
+ */
+int drm_gem_map_attach(struct dma_buf *dma_buf,
+ struct dma_buf_attachment *attach)
+{
+ struct drm_gem_object *obj = dma_buf->priv;
+
+ return drm_gem_pin(obj);
+}
+EXPORT_SYMBOL(drm_gem_map_attach);
+
+/**
+ * drm_gem_map_detach - dma_buf detach implementation for GEM
+ * @dma_buf: buffer to detach from
+ * @attach: attachment to be detached
+ *
+ * Cleans up &dma_buf_attachment. This can be used as the &dma_buf_ops.detach
+ * callback.
+ */
+void drm_gem_map_detach(struct dma_buf *dma_buf,
+ struct dma_buf_attachment *attach)
+{
+ struct drm_gem_object *obj = dma_buf->priv;
+
+ drm_gem_unpin(obj);
+}
+EXPORT_SYMBOL(drm_gem_map_detach);
+
+/**
+ * drm_gem_map_dma_buf - map_dma_buf implementation for GEM
+ * @attach: attachment whose scatterlist is to be returned
+ * @dir: direction of DMA transfer
+ *
+ * Calls &drm_driver.gem_prime_get_sg_table and then maps the scatterlist. This
+ * can be used as the &dma_buf_ops.map_dma_buf callback.
+ *
+ * Returns sg_table containing the scatterlist to be returned; returns ERR_PTR
+ * on error. May return -EINTR if it is interrupted by a signal.
+ */
+
+struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
+ enum dma_data_direction dir)
+{
+ struct drm_gem_object *obj = attach->dmabuf->priv;
+ struct sg_table *sgt;
+
+ if (WARN_ON(dir == DMA_NONE))
+ return ERR_PTR(-EINVAL);
+
+ if (obj->funcs)
+ sgt = obj->funcs->get_sg_table(obj);
+ else
+ sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
+
+ if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
+ DMA_ATTR_SKIP_CPU_SYNC)) {
+ sg_free_table(sgt);
+ kfree(sgt);
+ sgt = ERR_PTR(-ENOMEM);
+ }
+
+ return sgt;
+}
+EXPORT_SYMBOL(drm_gem_map_dma_buf);
+
+/**
+ * drm_gem_unmap_dma_buf - unmap_dma_buf implementation for GEM
+ * @attach: attachment to unmap buffer from
+ * @sgt: scatterlist info of the buffer to unmap
+ * @dir: direction of DMA transfer
+ *
+ * This can be used as the &dma_buf_ops.unmap_dma_buf callback.
+ */
+void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
+ struct sg_table *sgt,
+ enum dma_data_direction dir)
+{
+ if (!sgt)
+ return;
+
+ dma_unmap_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
+ DMA_ATTR_SKIP_CPU_SYNC);
+ sg_free_table(sgt);
+ kfree(sgt);
+}
+EXPORT_SYMBOL(drm_gem_unmap_dma_buf);
+
+/**
+ * drm_gem_dmabuf_vmap - dma_buf vmap implementation for GEM
+ * @dma_buf: buffer to be mapped
+ *
+ * Sets up a kernel virtual mapping. This can be used as the &dma_buf_ops.vmap
+ * callback.
+ *
+ * Returns the kernel virtual address.
+ */
+void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf)
+{
+ struct drm_gem_object *obj = dma_buf->priv;
+ void *vaddr;
+
+ vaddr = drm_gem_vmap(obj);
+ if (IS_ERR(vaddr))
+ vaddr = NULL;
+
+ return vaddr;
+}
+EXPORT_SYMBOL(drm_gem_dmabuf_vmap);
+
+/**
+ * drm_gem_dmabuf_vunmap - dma_buf vunmap implementation for GEM
+ * @dma_buf: buffer to be unmapped
+ * @vaddr: the virtual address of the buffer
+ *
+ * Releases a kernel virtual mapping. This can be used as the
+ * &dma_buf_ops.vunmap callback.
+ */
+void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
+{
+ struct drm_gem_object *obj = dma_buf->priv;
+
+ drm_gem_vunmap(obj, vaddr);
+}
+EXPORT_SYMBOL(drm_gem_dmabuf_vunmap);
+
+/**
+ * drm_gem_prime_mmap - PRIME mmap function for GEM drivers
+ * @obj: GEM object
+ * @vma: Virtual address range
+ *
+ * This function sets up a userspace mapping for PRIME exported buffers using
+ * the same codepath that is used for regular GEM buffer mapping on the DRM fd.
+ * The fake GEM offset is added to vma->vm_pgoff and &drm_driver->fops->mmap is
+ * called to set up the mapping.
+ *
+ * Drivers can use this as their &drm_driver.gem_prime_mmap callback.
+ */
+int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
+{
+ struct drm_file *priv;
+ struct file *fil;
+ int ret;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ fil = kzalloc(sizeof(*fil), GFP_KERNEL);
+ if (!priv || !fil) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ /* Used by drm_gem_mmap() to lookup the GEM object */
+ priv->minor = obj->dev->primary;
+ fil->private_data = priv;
+
+ ret = drm_vma_node_allow(&obj->vma_node, priv);
+ if (ret)
+ goto out;
+
+ vma->vm_pgoff += drm_vma_node_start(&obj->vma_node);
+
+ ret = obj->dev->driver->fops->mmap(fil, vma);
+
+ drm_vma_node_revoke(&obj->vma_node, priv);
+out:
+ kfree(priv);
+ kfree(fil);
+
+ return ret;
+}
+EXPORT_SYMBOL(drm_gem_prime_mmap);
+
+/**
+ * drm_gem_dmabuf_mmap - dma_buf mmap implementation for GEM
+ * @dma_buf: buffer to be mapped
+ * @vma: virtual address range
+ *
+ * Provides memory mapping for the buffer. This can be used as the
+ * &dma_buf_ops.mmap callback.
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma)
+{
+ struct drm_gem_object *obj = dma_buf->priv;
+ struct drm_device *dev = obj->dev;
+
+ if (!dev->driver->gem_prime_mmap)
+ return -ENOSYS;
+
+ return dev->driver->gem_prime_mmap(obj, vma);
}
-EXPORT_SYMBOL(drm_gem_prime_handle_to_fd);
+EXPORT_SYMBOL(drm_gem_dmabuf_mmap);
+
+static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = {
+ .cache_sgt_mapping = true,
+ .attach = drm_gem_map_attach,
+ .detach = drm_gem_map_detach,
+ .map_dma_buf = drm_gem_map_dma_buf,
+ .unmap_dma_buf = drm_gem_unmap_dma_buf,
+ .release = drm_gem_dmabuf_release,
+ .mmap = drm_gem_dmabuf_mmap,
+ .vmap = drm_gem_dmabuf_vmap,
+ .vunmap = drm_gem_dmabuf_vunmap,
+};

/**
- * drm_gem_prime_mmap - PRIME mmap function for GEM drivers
- * @obj: GEM object
- * @vma: Virtual address range
- *
- * This function sets up a userspace mapping for PRIME exported buffers using
- * the same codepath that is used for regular GEM buffer mapping on the DRM fd.
- * The fake GEM offset is added to vma->vm_pgoff and &drm_driver->fops->mmap is
- * called to set up the mapping.
+ * drm_prime_pages_to_sg - converts a page array into an sg list
+ * @pages: pointer to the array of page pointers to convert
+ * @nr_pages: length of the page vector
*
- * Drivers can use this as their &drm_driver.gem_prime_mmap callback.
+ * 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 for use with dma_buf itself.
*/
-int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
+struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages)
{
- struct drm_file *priv;
- struct file *fil;
+ struct sg_table *sg = NULL;
int ret;

- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- fil = kzalloc(sizeof(*fil), GFP_KERNEL);
- if (!priv || !fil) {
+ sg = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
+ if (!sg) {
ret = -ENOMEM;
goto out;
}

- /* Used by drm_gem_mmap() to lookup the GEM object */
- priv->minor = obj->dev->primary;
- fil->private_data = priv;
-
- ret = drm_vma_node_allow(&obj->vma_node, priv);
+ ret = sg_alloc_table_from_pages(sg, pages, nr_pages, 0,
+ nr_pages << PAGE_SHIFT, GFP_KERNEL);
if (ret)
goto out;

- vma->vm_pgoff += drm_vma_node_start(&obj->vma_node);
+ return sg;
+out:
+ kfree(sg);
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL(drm_prime_pages_to_sg);

- ret = obj->dev->driver->fops->mmap(fil, vma);
+/**
+ * drm_gem_prime_export - helper library implementation of the export callback
+ * @dev: drm_device to export from
+ * @obj: GEM object to export
+ * @flags: flags like DRM_CLOEXEC and DRM_RDWR
+ *
+ * This is the implementation of the gem_prime_export functions for GEM drivers
+ * using the PRIME helpers.
+ */
+struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
+ struct drm_gem_object *obj,
+ int flags)
+{
+ struct dma_buf_export_info exp_info = {
+ .exp_name = KBUILD_MODNAME, /* white lie for debug */
+ .owner = dev->driver->fops->owner,
+ .ops = &drm_gem_prime_dmabuf_ops,
+ .size = obj->size,
+ .flags = flags,
+ .priv = obj,
+ .resv = obj->resv,
+ };

- drm_vma_node_revoke(&obj->vma_node, priv);
-out:
- kfree(priv);
- kfree(fil);
+ if (dev->driver->gem_prime_res_obj)
+ exp_info.resv = dev->driver->gem_prime_res_obj(obj);

- return ret;
+ return drm_gem_dmabuf_export(dev, &exp_info);
}
-EXPORT_SYMBOL(drm_gem_prime_mmap);
+EXPORT_SYMBOL(drm_gem_prime_export);

/**
* drm_gem_prime_import_dev - core implementation of the import callback
@@ -737,154 +898,6 @@ struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
}
EXPORT_SYMBOL(drm_gem_prime_import);

-/**
- * drm_gem_prime_fd_to_handle - PRIME import function for GEM drivers
- * @dev: dev to export the buffer from
- * @file_priv: drm file-private structure
- * @prime_fd: fd id of the dma-buf which should be imported
- * @handle: pointer to storage for the handle of the imported buffer object
- *
- * This is the PRIME import function which must be used mandatorily by GEM
- * drivers to ensure correct lifetime management of the underlying GEM object.
- * The actual importing of GEM object from the dma-buf is done through the
- * gem_import_export driver callback.
- */
-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);
-
- mutex_lock(&file_priv->prime.lock);
-
- ret = drm_prime_lookup_buf_handle(&file_priv->prime,
- dma_buf, handle);
- if (ret == 0)
- goto out_put;
-
- /* never seen this one, need to import */
- mutex_lock(&dev->object_name_lock);
- if (dev->driver->gem_prime_import)
- obj = dev->driver->gem_prime_import(dev, dma_buf);
- else
- obj = drm_gem_prime_import(dev, dma_buf);
- if (IS_ERR(obj)) {
- ret = PTR_ERR(obj);
- goto out_unlock;
- }
-
- if (obj->dma_buf) {
- WARN_ON(obj->dma_buf != dma_buf);
- } else {
- obj->dma_buf = dma_buf;
- get_dma_buf(dma_buf);
- }
-
- /* _handle_create_tail unconditionally unlocks dev->object_name_lock. */
- ret = drm_gem_handle_create_tail(file_priv, obj, handle);
- drm_gem_object_put_unlocked(obj);
- if (ret)
- goto out_put;
-
- ret = drm_prime_add_buf_handle(&file_priv->prime,
- dma_buf, *handle);
- mutex_unlock(&file_priv->prime.lock);
- if (ret)
- goto fail;
-
- dma_buf_put(dma_buf);
-
- return 0;
-
-fail:
- /* hmm, if driver attached, we are relying on the free-object path
- * to detach.. which seems ok..
- */
- drm_gem_handle_delete(file_priv, *handle);
- dma_buf_put(dma_buf);
- return ret;
-
-out_unlock:
- mutex_unlock(&dev->object_name_lock);
-out_put:
- mutex_unlock(&file_priv->prime.lock);
- 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;
-
- if (!drm_core_check_feature(dev, DRIVER_PRIME))
- return -EOPNOTSUPP;
-
- if (!dev->driver->prime_handle_to_fd)
- return -ENOSYS;
-
- /* check flags are valid */
- if (args->flags & ~(DRM_CLOEXEC | DRM_RDWR))
- return -EINVAL;
-
- return dev->driver->prime_handle_to_fd(dev, file_priv,
- args->handle, args->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 -EOPNOTSUPP;
-
- 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 - converts a page array into an sg list
- * @pages: pointer to the array of page pointers to convert
- * @nr_pages: length of the page vector
- *
- * 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 for use with dma_buf itself.
- */
-struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages)
-{
- struct sg_table *sg = NULL;
- int ret;
-
- sg = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
- if (!sg) {
- ret = -ENOMEM;
- goto out;
- }
-
- ret = sg_alloc_table_from_pages(sg, pages, nr_pages, 0,
- nr_pages << PAGE_SHIFT, GFP_KERNEL);
- if (ret)
- goto out;
-
- return sg;
-out:
- kfree(sg);
- return ERR_PTR(ret);
-}
-EXPORT_SYMBOL(drm_prime_pages_to_sg);
-
/**
* drm_prime_sg_to_page_addr_arrays - convert an sg table into a page array
* @sgt: scatter-gather table to convert
@@ -949,16 +962,3 @@ void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg)
dma_buf_put(dma_buf);
}
EXPORT_SYMBOL(drm_prime_gem_destroy);
-
-void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv)
-{
- mutex_init(&prime_fpriv->lock);
- prime_fpriv->dmabufs = RB_ROOT;
- prime_fpriv->handles = RB_ROOT;
-}
-
-void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv)
-{
- /* by now drm_gem_release should've made sure the list is empty */
- WARN_ON(!RB_EMPTY_ROOT(&prime_fpriv->dmabufs));
-}
diff --git a/include/drm/drm_prime.h b/include/drm/drm_prime.h
index b03731a3f079..ee32b07f3eb0 100644
--- a/include/drm/drm_prime.h
+++ b/include/drm/drm_prime.h
@@ -42,7 +42,6 @@
* This just contains the internal &struct dma_buf and handle caches for each
* &struct drm_file used by the PRIME core code.
*/
-
struct drm_prime_file_private {
/* private: */
struct mutex lock;
@@ -64,25 +63,18 @@ struct drm_file;

struct device;

-struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
- struct drm_gem_object *obj,
- int flags);
+/* core prime functions */
+struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
+ struct dma_buf_export_info *exp_info);
+void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
+
+int drm_gem_prime_fd_to_handle(struct drm_device *dev,
+ struct drm_file *file_priv, int prime_fd, 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);
-int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
-struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
- struct dma_buf *dma_buf);
-
-struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
- struct dma_buf *dma_buf,
- struct device *attach_dev);

-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 *drm_gem_dmabuf_export(struct drm_device *dev,
- struct dma_buf_export_info *exp_info);
-void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
+/* helper functions for exporting */
int drm_gem_map_attach(struct dma_buf *dma_buf,
struct dma_buf_attachment *attach);
void drm_gem_map_detach(struct dma_buf *dma_buf,
@@ -94,12 +86,26 @@ void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
enum dma_data_direction dir);
void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf);
void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr);
+
+int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma);

-int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
- dma_addr_t *addrs, int max_pages);
struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
+struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
+ struct drm_gem_object *obj,
+ int flags);
+
+/* helper functions for importing */
+struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
+ struct dma_buf *dma_buf,
+ struct device *attach_dev);
+struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
+ struct dma_buf *dma_buf);
+
void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);

+int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
+ dma_addr_t *addrs, int max_pages);
+

#endif /* __DRM_PRIME_H__ */
--
2.20.1