diff options
Diffstat (limited to 'rust/kernel')
| -rw-r--r-- | rust/kernel/drm/device.rs | 12 | ||||
| -rw-r--r-- | rust/kernel/drm/driver.rs | 12 |
2 files changed, 23 insertions, 1 deletions
diff --git a/rust/kernel/drm/device.rs b/rust/kernel/drm/device.rs index 403fc35353c7..dc16738eeb38 100644 --- a/rust/kernel/drm/device.rs +++ b/rust/kernel/drm/device.rs @@ -80,6 +80,16 @@ pub struct Device<T: drm::Driver> { } impl<T: drm::Driver> Device<T> { + const fn compute_features() -> u32 { + let mut features = drm::driver::FEAT_GEM; + + if T::FEAT_RENDER { + features |= drm::driver::FEAT_RENDER; + } + + features + } + const VTABLE: bindings::drm_driver = drm_legacy_fields! { load: None, open: Some(drm::File::<T::File>::open_callback), @@ -105,7 +115,7 @@ impl<T: drm::Driver> Device<T> { name: crate::str::as_char_ptr_in_const_context(T::INFO.name).cast_mut(), desc: crate::str::as_char_ptr_in_const_context(T::INFO.desc).cast_mut(), - driver_features: drm::driver::FEAT_GEM, + driver_features: Self::compute_features(), ioctls: T::IOCTLS.as_ptr(), num_ioctls: T::IOCTLS.len() as i32, fops: &Self::GEM_FOPS, diff --git a/rust/kernel/drm/driver.rs b/rust/kernel/drm/driver.rs index 5233bdebc9fc..6886396c8fa7 100644 --- a/rust/kernel/drm/driver.rs +++ b/rust/kernel/drm/driver.rs @@ -16,6 +16,8 @@ use crate::{ /// Driver use the GEM memory manager. This should be set for all modern drivers. pub(crate) const FEAT_GEM: u32 = bindings::drm_driver_feature_DRIVER_GEM; +/// Driver supports render nodes, i.e.: /dev/dri/renderDXX devices. +pub(crate) const FEAT_RENDER: u32 = bindings::drm_driver_feature_DRIVER_RENDER; /// Information data for a DRM Driver. pub struct DriverInfo { @@ -115,6 +117,16 @@ pub trait Driver { /// IOCTL list. See `kernel::drm::ioctl::declare_drm_ioctls!{}`. const IOCTLS: &'static [drm::ioctl::DrmIoctlDescriptor]; + + /// Sets the `DRIVER_RENDER` feature for this driver. + /// + /// When enabled, the driver exposes `/dev/dri/renderDXX` render nodes to + /// userspace. The render node is an alternate low-priviledge way to access + /// the driver, which is enforced on a per-ioctl level. Userspace processes + /// that open the render node can only invoke ioctls explicitly listed as + /// usable from the render node (i.e. marked DRM_RENDER_ALLOW), whereas + /// userspace processes using the master node can invoke any ioctl. + const FEAT_RENDER: bool = false; } /// The registration type of a `drm::Device`. |