forked from mirrors/linux
drm: Remove obsolete GEM and PRIME callbacks from struct drm_driver
Several GEM and PRIME callbacks have been deprecated in favor of per-instance GEM object functions. Remove the callbacks as they are now unused. The only exception is .gem_prime_mmap, which is still in use by several drivers. What is also gone is gem_vm_ops in struct drm_driver. All drivers now use struct drm_gem_object_funcs.vm_ops instead. While at it, the patch also improves error handling around calls to .free and .get_sg_table callbacks. v3: * restore default call to drm_gem_prime_export() in drm_gem_prime_handle_to_fd() * return -ENOSYS if get_sg_table is not set * drop all checks for obj->funcs * clean up TODO list and documentation v2: * update related TODO item (Sam) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Christian König <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200923102159.24084-23-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
parent
c85dce1b2e
commit
d693def4fd
7 changed files with 38 additions and 137 deletions
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@ -182,11 +182,11 @@ acquired and release by calling drm_gem_object_get() and drm_gem_object_put()
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respectively.
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When the last reference to a GEM object is released the GEM core calls
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the :c:type:`struct drm_driver <drm_driver>` gem_free_object_unlocked
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the :c:type:`struct drm_gem_object_funcs <gem_object_funcs>` free
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operation. That operation is mandatory for GEM-enabled drivers and must
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free the GEM object and all associated resources.
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void (\*gem_free_object) (struct drm_gem_object \*obj); Drivers are
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void (\*free) (struct drm_gem_object \*obj); Drivers are
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responsible for freeing all GEM object resources. This includes the
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resources created by the GEM core, which need to be released with
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drm_gem_object_release().
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@ -149,7 +149,7 @@ have to keep track of that lock and either call ``unreference`` or
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``unreference_locked`` depending upon context.
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Core GEM doesn't have a need for ``struct_mutex`` any more since kernel 4.8,
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and there's a ``gem_free_object_unlocked`` callback for any drivers which are
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and there's a GEM object ``free`` callback for any drivers which are
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entirely ``struct_mutex`` free.
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For drivers that need ``struct_mutex`` it should be replaced with a driver-
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@ -289,11 +289,8 @@ struct drm_gem_object_funcs
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---------------------------
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GEM objects can now have a function table instead of having the callbacks on the
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DRM driver struct. This is now the preferred way and drivers can be moved over.
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We also need a 2nd version of the CMA define that doesn't require the
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vmapping to be present (different hook for prime importing). Plus this needs to
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be rolled out to all drivers using their own implementations, too.
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DRM driver struct. This is now the preferred way. Callbacks in drivers have been
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converted, except for struct drm_driver.gem_prime_mmap.
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Level: Intermediate
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@ -247,12 +247,9 @@ drm_gem_object_release_handle(int id, void *ptr, void *data)
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{
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struct drm_file *file_priv = data;
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struct drm_gem_object *obj = ptr;
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struct drm_device *dev = obj->dev;
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if (obj->funcs && obj->funcs->close)
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if (obj->funcs->close)
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obj->funcs->close(obj, file_priv);
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else if (dev->driver->gem_close_object)
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dev->driver->gem_close_object(obj, file_priv);
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drm_gem_remove_prime_handles(obj, file_priv);
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drm_vma_node_revoke(&obj->vma_node, file_priv);
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@ -403,14 +400,10 @@ drm_gem_handle_create_tail(struct drm_file *file_priv,
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if (ret)
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goto err_remove;
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if (obj->funcs && obj->funcs->open) {
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if (obj->funcs->open) {
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ret = obj->funcs->open(obj, file_priv);
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if (ret)
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goto err_revoke;
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} else if (dev->driver->gem_open_object) {
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ret = dev->driver->gem_open_object(obj, file_priv);
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if (ret)
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goto err_revoke;
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}
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*handlep = handle;
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@ -982,12 +975,11 @@ drm_gem_object_free(struct kref *kref)
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{
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struct drm_gem_object *obj =
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container_of(kref, struct drm_gem_object, refcount);
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struct drm_device *dev = obj->dev;
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if (obj->funcs)
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obj->funcs->free(obj);
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else if (dev->driver->gem_free_object_unlocked)
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dev->driver->gem_free_object_unlocked(obj);
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if (WARN_ON(!obj->funcs->free))
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return;
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obj->funcs->free(obj);
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}
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EXPORT_SYMBOL(drm_gem_object_free);
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@ -1049,9 +1041,9 @@ EXPORT_SYMBOL(drm_gem_vm_close);
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* @obj_size: the object size to be mapped, in bytes
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* @vma: VMA for the area to be mapped
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*
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* Set up the VMA to prepare mapping of the GEM object using the gem_vm_ops
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* provided by the driver. Depending on their requirements, drivers can either
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* provide a fault handler in their gem_vm_ops (in which case any accesses to
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* Set up the VMA to prepare mapping of the GEM object using the GEM object's
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* vm_ops. Depending on their requirements, GEM objects can either
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* provide a fault handler in their vm_ops (in which case any accesses to
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* the object will be trapped, to perform migration, GTT binding, surface
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* register allocation, or performance monitoring), or mmap the buffer memory
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* synchronously after calling drm_gem_mmap_obj.
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@ -1065,12 +1057,11 @@ EXPORT_SYMBOL(drm_gem_vm_close);
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* callers must verify access restrictions before calling this helper.
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*
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* Return 0 or success or -EINVAL if the object size is smaller than the VMA
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* size, or if no gem_vm_ops are provided.
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* size, or if no vm_ops are provided.
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*/
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int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
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struct vm_area_struct *vma)
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{
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struct drm_device *dev = obj->dev;
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int ret;
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/* Check for valid size. */
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@ -1085,7 +1076,7 @@ int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
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*/
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drm_gem_object_get(obj);
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if (obj->funcs && obj->funcs->mmap) {
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if (obj->funcs->mmap) {
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ret = obj->funcs->mmap(obj, vma);
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if (ret) {
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drm_gem_object_put(obj);
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@ -1093,10 +1084,8 @@ int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
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}
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WARN_ON(!(vma->vm_flags & VM_DONTEXPAND));
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} else {
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if (obj->funcs && obj->funcs->vm_ops)
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if (obj->funcs->vm_ops)
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vma->vm_ops = obj->funcs->vm_ops;
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else if (dev->driver->gem_vm_ops)
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vma->vm_ops = dev->driver->gem_vm_ops;
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else {
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drm_gem_object_put(obj);
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return -EINVAL;
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@ -1198,36 +1187,30 @@ void drm_gem_print_info(struct drm_printer *p, unsigned int indent,
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drm_printf_indent(p, indent, "imported=%s\n",
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obj->import_attach ? "yes" : "no");
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if (obj->funcs && obj->funcs->print_info)
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if (obj->funcs->print_info)
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obj->funcs->print_info(p, indent, obj);
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}
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int drm_gem_pin(struct drm_gem_object *obj)
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{
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if (obj->funcs && obj->funcs->pin)
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if (obj->funcs->pin)
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return obj->funcs->pin(obj);
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else if (obj->dev->driver->gem_prime_pin)
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return obj->dev->driver->gem_prime_pin(obj);
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else
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return 0;
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}
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void drm_gem_unpin(struct drm_gem_object *obj)
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{
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if (obj->funcs && obj->funcs->unpin)
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if (obj->funcs->unpin)
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obj->funcs->unpin(obj);
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else if (obj->dev->driver->gem_prime_unpin)
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obj->dev->driver->gem_prime_unpin(obj);
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}
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void *drm_gem_vmap(struct drm_gem_object *obj)
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{
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void *vaddr;
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if (obj->funcs && obj->funcs->vmap)
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if (obj->funcs->vmap)
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vaddr = obj->funcs->vmap(obj);
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else if (obj->dev->driver->gem_prime_vmap)
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vaddr = obj->dev->driver->gem_prime_vmap(obj);
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else
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vaddr = ERR_PTR(-EOPNOTSUPP);
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@ -1242,10 +1225,8 @@ void drm_gem_vunmap(struct drm_gem_object *obj, void *vaddr)
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if (!vaddr)
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return;
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if (obj->funcs && obj->funcs->vunmap)
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if (obj->funcs->vunmap)
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obj->funcs->vunmap(obj, vaddr);
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else if (obj->dev->driver->gem_prime_vunmap)
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obj->dev->driver->gem_prime_vunmap(obj, vaddr);
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}
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/**
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@ -171,7 +171,7 @@ drm_gem_cma_create_with_handle(struct drm_file *file_priv,
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* GEM object state and frees the memory used to store the object itself.
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* If the buffer is imported and the virtual address is set, it is released.
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* Drivers using the CMA helpers should set this as their
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* &drm_driver.gem_free_object_unlocked callback.
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* &drm_gem_object_funcs.free callback.
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*/
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void drm_gem_cma_free_object(struct drm_gem_object *gem_obj)
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{
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@ -419,7 +419,7 @@ EXPORT_SYMBOL(drm_gem_cma_print_info);
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*
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* This function exports a scatter/gather table suitable for PRIME usage by
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* calling the standard DMA mapping API. Drivers using the CMA helpers should
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* set this as their &drm_driver.gem_prime_get_sg_table callback.
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* set this as their &drm_gem_object_funcs.get_sg_table callback.
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*
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* Returns:
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* A pointer to the scatter/gather table of pinned pages or NULL on failure.
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@ -542,7 +542,7 @@ EXPORT_SYMBOL_GPL(drm_gem_cma_prime_mmap);
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* virtual address space. Since the CMA buffers are already mapped into the
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* kernel virtual address space this simply returns the cached virtual
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* address. Drivers using the CMA helpers should set this as their DRM
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* driver's &drm_driver.gem_prime_vmap callback.
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* driver's &drm_gem_object_funcs.vmap callback.
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*
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* Returns:
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* The kernel virtual address of the CMA GEM object's backing store.
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@ -564,7 +564,7 @@ EXPORT_SYMBOL_GPL(drm_gem_cma_prime_vmap);
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* This function removes a buffer exported via DRM PRIME from the kernel's
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* virtual address space. This is a no-op because CMA buffers cannot be
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* unmapped from kernel space. Drivers using the CMA helpers should set this
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* as their &drm_driver.gem_prime_vunmap callback.
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* as their &drm_gem_object_funcs.vunmap callback.
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*/
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void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
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{
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@ -386,8 +386,6 @@ static struct dma_buf *export_and_register_object(struct drm_device *dev,
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if (obj->funcs && obj->funcs->export)
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dmabuf = obj->funcs->export(obj, flags);
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else if (dev->driver->gem_prime_export)
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dmabuf = dev->driver->gem_prime_export(obj, flags);
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else
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dmabuf = drm_gem_prime_export(obj, flags);
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if (IS_ERR(dmabuf)) {
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@ -419,7 +417,7 @@ static struct dma_buf *export_and_register_object(struct drm_device *dev,
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* This is the PRIME export function which must be used mandatorily by GEM
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* drivers to ensure correct lifetime management of the underlying GEM object.
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* The actual exporting from GEM object to a dma-buf is done through the
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* &drm_driver.gem_prime_export driver callback.
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* &drm_gem_object_funcs.export callback.
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*/
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int drm_gem_prime_handle_to_fd(struct drm_device *dev,
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struct drm_file *file_priv, uint32_t handle,
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@ -621,10 +619,12 @@ struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
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if (WARN_ON(dir == DMA_NONE))
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return ERR_PTR(-EINVAL);
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if (obj->funcs)
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sgt = obj->funcs->get_sg_table(obj);
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else
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sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
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if (WARN_ON(!obj->funcs->get_sg_table))
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return ERR_PTR(-ENOSYS);
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sgt = obj->funcs->get_sg_table(obj);
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if (IS_ERR(sgt))
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return sgt;
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if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
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DMA_ATTR_SKIP_CPU_SYNC)) {
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@ -36,10 +36,12 @@ struct drm_file;
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struct drm_gem_object;
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struct drm_master;
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struct drm_minor;
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struct dma_buf;
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struct dma_buf_attachment;
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struct drm_display_mode;
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struct drm_mode_create_dumb;
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struct drm_printer;
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struct sg_table;
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/**
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* enum drm_driver_feature - feature flags
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@ -326,32 +328,6 @@ struct drm_driver {
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*/
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void (*debugfs_init)(struct drm_minor *minor);
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/**
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* @gem_free_object_unlocked: deconstructor for drm_gem_objects
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*
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* This is deprecated and should not be used by new drivers. Use
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* &drm_gem_object_funcs.free instead.
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*/
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void (*gem_free_object_unlocked) (struct drm_gem_object *obj);
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/**
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* @gem_open_object:
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*
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* This callback is deprecated in favour of &drm_gem_object_funcs.open.
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*
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* Driver hook called upon gem handle creation
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*/
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int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
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/**
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* @gem_close_object:
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*
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* This callback is deprecated in favour of &drm_gem_object_funcs.close.
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*
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* Driver hook called upon gem handle release
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*/
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void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
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/**
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* @gem_create_object: constructor for gem objects
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*
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@ -360,6 +336,7 @@ struct drm_driver {
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*/
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struct drm_gem_object *(*gem_create_object)(struct drm_device *dev,
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size_t size);
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/**
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* @prime_handle_to_fd:
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*
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@ -382,14 +359,7 @@ struct drm_driver {
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*/
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int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
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int prime_fd, uint32_t *handle);
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/**
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* @gem_prime_export:
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*
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* Export hook for GEM drivers. Deprecated in favour of
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* &drm_gem_object_funcs.export.
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*/
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struct dma_buf * (*gem_prime_export)(struct drm_gem_object *obj,
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int flags);
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/**
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* @gem_prime_import:
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*
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@ -399,29 +369,6 @@ struct drm_driver {
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*/
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struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
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struct dma_buf *dma_buf);
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/**
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* @gem_prime_pin:
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*
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* Deprecated hook in favour of &drm_gem_object_funcs.pin.
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*/
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int (*gem_prime_pin)(struct drm_gem_object *obj);
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/**
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* @gem_prime_unpin:
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*
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* Deprecated hook in favour of &drm_gem_object_funcs.unpin.
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*/
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void (*gem_prime_unpin)(struct drm_gem_object *obj);
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/**
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* @gem_prime_get_sg_table:
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*
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* Deprecated hook in favour of &drm_gem_object_funcs.get_sg_table.
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*/
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struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
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/**
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* @gem_prime_import_sg_table:
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*
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@ -432,22 +379,6 @@ struct drm_driver {
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struct drm_device *dev,
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struct dma_buf_attachment *attach,
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struct sg_table *sgt);
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/**
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* @gem_prime_vmap:
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*
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* Deprecated vmap hook for GEM drivers. Please use
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* &drm_gem_object_funcs.vmap instead.
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*/
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void *(*gem_prime_vmap)(struct drm_gem_object *obj);
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/**
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* @gem_prime_vunmap:
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*
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* Deprecated vunmap hook for GEM drivers. Please use
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* &drm_gem_object_funcs.vunmap instead.
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*/
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void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
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/**
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* @gem_prime_mmap:
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*
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@ -522,14 +453,6 @@ struct drm_driver {
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struct drm_device *dev,
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uint32_t handle);
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/**
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* @gem_vm_ops: Driver private ops for this object
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*
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* For GEM drivers this is deprecated in favour of
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* &drm_gem_object_funcs.vm_ops.
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*/
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const struct vm_operations_struct *gem_vm_ops;
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/** @major: driver major number */
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int major;
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/** @minor: driver minor number */
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|
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@ -272,7 +272,7 @@ struct drm_gem_object {
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* attachment point for the device. This is invariant over the lifetime
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* of a gem object.
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*
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* The &drm_driver.gem_free_object_unlocked callback is responsible for
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* The &drm_gem_object_funcs.free callback is responsible for
|
||||
* cleaning up the dma_buf attachment and references acquired at import
|
||||
* time.
|
||||
*
|
||||
|
|
|
|||
Loading…
Reference in a new issue