1 // SPDX-License-Identifier: GPL-2.0 2 3 use kernel::{ 4 drm, 5 drm::{gem, gem::BaseObject, DeviceContext}, 6 page, 7 prelude::*, 8 sync::aref::ARef, 9 }; 10 11 use crate::{ 12 driver::{NovaDevice, NovaDriver}, 13 file::File, 14 }; 15 16 /// GEM Object inner driver data 17 #[pin_data] 18 pub(crate) struct NovaObject {} 19 20 impl gem::DriverObject for NovaObject { 21 type Driver = NovaDriver; 22 type Args = (); 23 24 fn new<Ctx: DeviceContext>( 25 _dev: &NovaDevice<Ctx>, 26 _size: usize, 27 _args: Self::Args, 28 ) -> impl PinInit<Self, Error> { 29 try_pin_init!(NovaObject {}) 30 } 31 } 32 33 impl NovaObject { 34 /// Create a new DRM GEM object. 35 pub(crate) fn new<Ctx: DeviceContext>( 36 dev: &NovaDevice<Ctx>, 37 size: usize, 38 ) -> Result<ARef<gem::Object<Self, Ctx>>> { 39 if size == 0 { 40 return Err(EINVAL); 41 } 42 let aligned_size = page::page_align(size).ok_or(EINVAL)?; 43 44 gem::Object::<Self, Ctx>::new(dev, aligned_size, ()) 45 } 46 47 /// Look up a GEM object handle for a `File` and return an `ObjectRef` for it. 48 #[inline] 49 pub(crate) fn lookup_handle( 50 file: &drm::File<File>, 51 handle: u32, 52 ) -> Result<ARef<gem::Object<Self>>> { 53 gem::Object::lookup_handle(file, handle) 54 } 55 } 56