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linux/drivers/gpu/drm/nova/driver.rs

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drm: nova-drm: add initial driver skeleton Add the initial nova-drm driver skeleton. nova-drm is connected to nova-core through the auxiliary bus and implements the DRM parts of the nova driver stack. For now, it implements the fundamental DRM abstractions, i.e. creates a DRM device and registers it, exposing a three sample IOCTLs. DRM_IOCTL_NOVA_GETPARAM - provides the PCI bar size from the bar that maps the GPUs VRAM from nova-core DRM_IOCTL_NOVA_GEM_CREATE - creates a new dummy DRM GEM object and returns a handle DRM_IOCTL_NOVA_GEM_INFO - provides metadata for the DRM GEM object behind a given handle I implemented a small userspace test suite [1] that utilizes this interface. Link: https://gitlab.freedesktop.org/dakr/drm-test [1] Reviewed-by: Maxime Ripard <mripard@kernel.org> Acked-by: Dave Airlie <airlied@redhat.com> Link: https://lore.kernel.org/r/20250424160452.8070-3-dakr@kernel.org [ Kconfig: depend on DRM=y rather than just DRM. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-04-24 18:02:50 +02:00
drm: nova: update ARef import from sync::aref Update nova to import `ARef` from `sync::aref` instead of `types`. This aligns with the ongoing effort to move `ARef` and `AlwaysRefCounted` to sync. Suggested-by: Benno Lossin <lossin@kernel.org> Link: https://github.com/Rust-for-Linux/linux/issues/1173 Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com> Link: https://lore.kernel.org/r/20250716090941.811418-1-shankari.ak0208@gmail.com [ Alter subject and commit message to be nova specific. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-07-16 14:39:41 +05:30
gpu: nova: replace `kernel::c_str!` with C-Strings C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Tamir Duberstein <tamird@gmail.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20251222-cstr-nova-v1-1-0e2353d5debe@gmail.com [ Use 'nova' commit subject prefix; use kernel vertical import style. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-22 13:20:05 +01:00
drm: nova: update ARef import from sync::aref Update nova to import `ARef` from `sync::aref` instead of `types`. This aligns with the ongoing effort to move `ARef` and `AlwaysRefCounted` to sync. Suggested-by: Benno Lossin <lossin@kernel.org> Link: https://github.com/Rust-for-Linux/linux/issues/1173 Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com> Link: https://lore.kernel.org/r/20250716090941.811418-1-shankari.ak0208@gmail.com [ Alter subject and commit message to be nova specific. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-07-16 14:39:41 +05:30
drm: nova-drm: add initial driver skeleton Add the initial nova-drm driver skeleton. nova-drm is connected to nova-core through the auxiliary bus and implements the DRM parts of the nova driver stack. For now, it implements the fundamental DRM abstractions, i.e. creates a DRM device and registers it, exposing a three sample IOCTLs. DRM_IOCTL_NOVA_GETPARAM - provides the PCI bar size from the bar that maps the GPUs VRAM from nova-core DRM_IOCTL_NOVA_GEM_CREATE - creates a new dummy DRM GEM object and returns a handle DRM_IOCTL_NOVA_GEM_INFO - provides metadata for the DRM GEM object behind a given handle I implemented a small userspace test suite [1] that utilizes this interface. Link: https://gitlab.freedesktop.org/dakr/drm-test [1] Reviewed-by: Maxime Ripard <mripard@kernel.org> Acked-by: Dave Airlie <airlied@redhat.com> Link: https://lore.kernel.org/r/20250424160452.8070-3-dakr@kernel.org [ Kconfig: depend on DRM=y rather than just DRM. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-04-24 18:02:50 +02:00
gpu: nova: replace `kernel::c_str!` with C-Strings C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Tamir Duberstein <tamird@gmail.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20251222-cstr-nova-v1-1-0e2353d5debe@gmail.com [ Use 'nova' commit subject prefix; use kernel vertical import style. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-22 13:20:05 +01:00
drm: nova-drm: add initial driver skeleton Add the initial nova-drm driver skeleton. nova-drm is connected to nova-core through the auxiliary bus and implements the DRM parts of the nova driver stack. For now, it implements the fundamental DRM abstractions, i.e. creates a DRM device and registers it, exposing a three sample IOCTLs. DRM_IOCTL_NOVA_GETPARAM - provides the PCI bar size from the bar that maps the GPUs VRAM from nova-core DRM_IOCTL_NOVA_GEM_CREATE - creates a new dummy DRM GEM object and returns a handle DRM_IOCTL_NOVA_GEM_INFO - provides metadata for the DRM GEM object behind a given handle I implemented a small userspace test suite [1] that utilizes this interface. Link: https://gitlab.freedesktop.org/dakr/drm-test [1] Reviewed-by: Maxime Ripard <mripard@kernel.org> Acked-by: Dave Airlie <airlied@redhat.com> Link: https://lore.kernel.org/r/20250424160452.8070-3-dakr@kernel.org [ Kconfig: depend on DRM=y rather than just DRM. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-04-24 18:02:50 +02:00
gpu: nova: replace `kernel::c_str!` with C-Strings C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Tamir Duberstein <tamird@gmail.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20251222-cstr-nova-v1-1-0e2353d5debe@gmail.com [ Use 'nova' commit subject prefix; use kernel vertical import style. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-22 13:20:05 +01:00
drm: nova-drm: add initial driver skeleton Add the initial nova-drm driver skeleton. nova-drm is connected to nova-core through the auxiliary bus and implements the DRM parts of the nova driver stack. For now, it implements the fundamental DRM abstractions, i.e. creates a DRM device and registers it, exposing a three sample IOCTLs. DRM_IOCTL_NOVA_GETPARAM - provides the PCI bar size from the bar that maps the GPUs VRAM from nova-core DRM_IOCTL_NOVA_GEM_CREATE - creates a new dummy DRM GEM object and returns a handle DRM_IOCTL_NOVA_GEM_INFO - provides metadata for the DRM GEM object behind a given handle I implemented a small userspace test suite [1] that utilizes this interface. Link: https://gitlab.freedesktop.org/dakr/drm-test [1] Reviewed-by: Maxime Ripard <mripard@kernel.org> Acked-by: Dave Airlie <airlied@redhat.com> Link: https://lore.kernel.org/r/20250424160452.8070-3-dakr@kernel.org [ Kconfig: depend on DRM=y rather than just DRM. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-04-24 18:02:50 +02:00
rust: driver: let probe() return impl PinInit<Self, Error> The driver model defines the lifetime of the private data stored in (and owned by) a bus device to be valid from when the driver is bound to a device (i.e. from successful probe()) until the driver is unbound from the device. This is already taken care of by the Rust implementation of the driver model. However, we still ask drivers to return a Result<Pin<KBox<Self>>> from probe(). Unlike in C, where we do not have the concept of initializers, but rather deal with uninitialized memory, drivers can just return an impl PinInit<Self, Error> instead. This contributes to more clarity to the fact that a driver returns it's device private data in probe() and the Rust driver model owns the data, manages the lifetime and - considering the lifetime - provides (safe) accessors for the driver. Hence, let probe() functions return an impl PinInit<Self, Error> instead of Result<Pin<KBox<Self>>>. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-10-16 14:55:28 +02:00
drm: nova-drm: add initial driver skeleton Add the initial nova-drm driver skeleton. nova-drm is connected to nova-core through the auxiliary bus and implements the DRM parts of the nova driver stack. For now, it implements the fundamental DRM abstractions, i.e. creates a DRM device and registers it, exposing a three sample IOCTLs. DRM_IOCTL_NOVA_GETPARAM - provides the PCI bar size from the bar that maps the GPUs VRAM from nova-core DRM_IOCTL_NOVA_GEM_CREATE - creates a new dummy DRM GEM object and returns a handle DRM_IOCTL_NOVA_GEM_INFO - provides metadata for the DRM GEM object behind a given handle I implemented a small userspace test suite [1] that utilizes this interface. Link: https://gitlab.freedesktop.org/dakr/drm-test [1] Reviewed-by: Maxime Ripard <mripard@kernel.org> Acked-by: Dave Airlie <airlied@redhat.com> Link: https://lore.kernel.org/r/20250424160452.8070-3-dakr@kernel.org [ Kconfig: depend on DRM=y rather than just DRM. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-04-24 18:02:50 +02:00
rust: driver: let probe() return impl PinInit<Self, Error> The driver model defines the lifetime of the private data stored in (and owned by) a bus device to be valid from when the driver is bound to a device (i.e. from successful probe()) until the driver is unbound from the device. This is already taken care of by the Rust implementation of the driver model. However, we still ask drivers to return a Result<Pin<KBox<Self>>> from probe(). Unlike in C, where we do not have the concept of initializers, but rather deal with uninitialized memory, drivers can just return an impl PinInit<Self, Error> instead. This contributes to more clarity to the fact that a driver returns it's device private data in probe() and the Rust driver model owns the data, manages the lifetime and - considering the lifetime - provides (safe) accessors for the driver. Hence, let probe() functions return an impl PinInit<Self, Error> instead of Result<Pin<KBox<Self>>>. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-10-16 14:55:28 +02:00
drm: nova-drm: add initial driver skeleton Add the initial nova-drm driver skeleton. nova-drm is connected to nova-core through the auxiliary bus and implements the DRM parts of the nova driver stack. For now, it implements the fundamental DRM abstractions, i.e. creates a DRM device and registers it, exposing a three sample IOCTLs. DRM_IOCTL_NOVA_GETPARAM - provides the PCI bar size from the bar that maps the GPUs VRAM from nova-core DRM_IOCTL_NOVA_GEM_CREATE - creates a new dummy DRM GEM object and returns a handle DRM_IOCTL_NOVA_GEM_INFO - provides metadata for the DRM GEM object behind a given handle I implemented a small userspace test suite [1] that utilizes this interface. Link: https://gitlab.freedesktop.org/dakr/drm-test [1] Reviewed-by: Maxime Ripard <mripard@kernel.org> Acked-by: Dave Airlie <airlied@redhat.com> Link: https://lore.kernel.org/r/20250424160452.8070-3-dakr@kernel.org [ Kconfig: depend on DRM=y rather than just DRM. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-04-24 18:02:50 +02:00