From b283e92a2315f9368dda010c9633183147fe87e0 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 18 Jun 2019 11:20:37 +0200 Subject: [PATCH] drm/prime: Shuffle functions. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Cc: Eric Anholt Cc: Emil Velikov Acked-by: Gerd Hoffmann Acked-by: Emil Velikov Acked-by: Noralf Trønnes Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20190618092038.17929-1-daniel.vetter@ffwll.ch --- 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 @@ out: 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__ */ -- 2.30.2