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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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46f651d886
Add a 'bound lifetime to the associated Data, changing type Data to type Data<'bound>. This allows the driver's bus device private data to capture the device / driver bound lifetime; device resources can be stored directly by reference rather than requiring Devres. The probe() and unbind() callbacks thus gain a 'bound lifetime parameter on the methods themselves; avoiding a global lifetime on the trait impl. Existing drivers set type Data<'bound> = Self, preserving the current behavior. Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Gary Guo <gary@garyguo.net> Link: https://patch.msgid.link/20260525202921.124698-15-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>
84 lines
2.0 KiB
Rust
84 lines
2.0 KiB
Rust
// SPDX-License-Identifier: GPL-2.0
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use kernel::{
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auxiliary,
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device::Core,
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drm::{
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self,
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gem,
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ioctl, //
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},
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prelude::*,
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sync::aref::ARef, //
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};
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use crate::file::File;
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use crate::gem::NovaObject;
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pub(crate) struct NovaDriver {
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#[expect(unused)]
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drm: ARef<drm::Device<Self>>,
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}
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/// Convienence type alias for the DRM device type for this driver
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pub(crate) type NovaDevice = drm::Device<NovaDriver>;
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#[pin_data]
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pub(crate) struct NovaData {
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pub(crate) adev: ARef<auxiliary::Device>,
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}
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const INFO: drm::DriverInfo = drm::DriverInfo {
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major: 0,
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minor: 0,
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patchlevel: 0,
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name: c"nova",
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desc: c"Nvidia Graphics",
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};
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const NOVA_CORE_MODULE_NAME: &CStr = c"NovaCore";
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const AUXILIARY_NAME: &CStr = c"nova-drm";
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kernel::auxiliary_device_table!(
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AUX_TABLE,
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MODULE_AUX_TABLE,
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<NovaDriver as auxiliary::Driver>::IdInfo,
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[(
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auxiliary::DeviceId::new(NOVA_CORE_MODULE_NAME, AUXILIARY_NAME),
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()
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)]
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);
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impl auxiliary::Driver for NovaDriver {
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type IdInfo = ();
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type Data<'bound> = Self;
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const ID_TABLE: auxiliary::IdTable<Self::IdInfo> = &AUX_TABLE;
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fn probe<'bound>(
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adev: &'bound auxiliary::Device<Core<'_>>,
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_info: &'bound Self::IdInfo,
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) -> impl PinInit<Self, Error> + 'bound {
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let data = try_pin_init!(NovaData { adev: adev.into() });
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let drm = drm::Device::<Self>::new(adev.as_ref(), data)?;
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drm::Registration::new_foreign_owned(&drm, adev.as_ref(), 0)?;
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Ok(Self { drm })
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}
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}
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#[vtable]
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impl drm::Driver for NovaDriver {
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type Data = NovaData;
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type File = File;
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type Object = gem::Object<NovaObject>;
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const INFO: drm::DriverInfo = INFO;
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kernel::declare_drm_ioctls! {
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(NOVA_GETPARAM, drm_nova_getparam, ioctl::RENDER_ALLOW, File::get_param),
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(NOVA_GEM_CREATE, drm_nova_gem_create, ioctl::AUTH | ioctl::RENDER_ALLOW, File::gem_create),
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(NOVA_GEM_INFO, drm_nova_gem_info, ioctl::AUTH | ioctl::RENDER_ALLOW, File::gem_info),
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}
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}
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