diff --git a/MAINTAINERS b/MAINTAINERS
index 15c8df5b3590625e74c3785305fd097e5f016d0d..6ded83282f7ec30839cde185895789a506e8a59a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7366,6 +7366,16 @@ T: git https://gitlab.freedesktop.org/drm/nouveau.git
F: drivers/gpu/drm/nouveau/
F: include/uapi/drm/nouveau_drm.h
+DRM DRIVER (STUB) FOR NVIDIA GSP GPUS [RUST]
+M: Danilo Krummrich <dakr@kernel.org>
+L: dri-devel@lists.freedesktop.org
+L: nouveau@lists.freedesktop.org
+S: Supported
+C: irc://irc.oftc.net/nouveau
+T: git https://gitlab.freedesktop.org/drm/nova.git
+F: drivers/gpu/drm/nova/
+F: include/uapi/drm/nova_drm.h
+
DRM DRIVER FOR OLIMEX LCD-OLINUXINO PANELS
M: Stefan Mavrodiev <stefan@olimex.com>
S: Maintained
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 5504721007cc190e7d768d42aa9633baa0115f5e..8f3bfed137aadbb5bba08bb0fa04edb385c4ac9c 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -394,6 +394,8 @@ source "drivers/gpu/drm/amd/amdgpu/Kconfig"
source "drivers/gpu/drm/nouveau/Kconfig"
+source "drivers/gpu/drm/nova/Kconfig"
+
source "drivers/gpu/drm/i915/Kconfig"
source "drivers/gpu/drm/xe/Kconfig"
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 463afad1b5ca6275e61223adc8ca036c3d4d6b03..7e52712fcff498327c5551d952c44fa6e51cf174 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -181,6 +181,7 @@ obj-$(CONFIG_DRM_VMWGFX)+= vmwgfx/
obj-$(CONFIG_DRM_VGEM) += vgem/
obj-$(CONFIG_DRM_VKMS) += vkms/
obj-$(CONFIG_DRM_NOUVEAU) +=nouveau/
+obj-$(CONFIG_DRM_NOVA_STUB) += nova/
obj-$(CONFIG_DRM_EXYNOS) +=exynos/
obj-$(CONFIG_DRM_ROCKCHIP) +=rockchip/
obj-$(CONFIG_DRM_GMA500) += gma500/
diff --git a/drivers/gpu/drm/nova/Kconfig b/drivers/gpu/drm/nova/Kconfig
new file mode 100644
index 0000000000000000000000000000000000000000..3c15593e054b5b0c364289ba7960b27f8fdb3108
--- /dev/null
+++ b/drivers/gpu/drm/nova/Kconfig
@@ -0,0 +1,12 @@
+config DRM_NOVA_STUB
+ tristate "Nova GPU driver stub"
+ depends on DRM
+ depends on PCI
+ depends on RUST
+ depends on RUST_FW_LOADER_ABSTRACTIONS
+ default n
+ help
+ Choose this if you want to build the Nova stub driver for Nvidia
+ GSP-based GPUs.
+
+ If M is selected, the module will be called nova.
diff --git a/drivers/gpu/drm/nova/Makefile b/drivers/gpu/drm/nova/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..733ac5fb9f4f4714e33358fc2b93c0781800c0f9
--- /dev/null
+++ b/drivers/gpu/drm/nova/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_DRM_NOVA_STUB) += nova.o
diff --git a/drivers/gpu/drm/nova/driver.rs b/drivers/gpu/drm/nova/driver.rs
new file mode 100644
index 0000000000000000000000000000000000000000..8182d41ef7efa3189c6b66ed119337d9395bb303
--- /dev/null
+++ b/drivers/gpu/drm/nova/driver.rs
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0
+
+use kernel::{
+ bindings, c_str, drm,
+ drm::{drv, ioctl},
+ pci,
+ prelude::*,
+ sync::Arc,
+ types::ARef,
+};
+
+use crate::{file::File, gpu::Gpu};
+
+pub(crate) struct NovaDriver(ARef<NovaDevice>);
+
+/// Convienence type alias for the DRM device type for this driver
+pub(crate) type NovaDevice = drm::device::Device<NovaDriver>;
+
+#[allow(dead_code)]
+#[pin_data]
+pub(crate) struct NovaData {
+ #[pin]
+ pub(crate) gpu: Gpu,
+ pub(crate) pdev: pci::Device,
+}
+
+const BAR0_SIZE: usize = 8;
+pub(crate) type Bar0 = pci::Bar<BAR0_SIZE>;
+
+const INFO: drm::drv::DriverInfo = drm::drv::DriverInfo {
+ major: 0,
+ minor: 0,
+ patchlevel: 0,
+ name: c_str!("nova"),
+ desc: c_str!("Nvidia Graphics"),
+ date: c_str!("20240227"),
+};
+
+kernel::pci_device_table!(
+ PCI_TABLE,
+ MODULE_PCI_TABLE,
+ <NovaDriver as pci::Driver>::IdInfo,
+ [(
+ pci::DeviceId::from_id(bindings::PCI_VENDOR_ID_NVIDIA, bindings::PCI_ANY_ID as _),
+ ()
+ )]
+);
+
+impl pci::Driver for NovaDriver {
+ type IdInfo = ();
+ const ID_TABLE: pci::IdTable<Self::IdInfo> = &PCI_TABLE;
+
+ fn probe(pdev: &mut pci::Device, _info: &Self::IdInfo) -> Result<Pin<KBox<Self>>> {
+ dev_dbg!(pdev.as_ref(), "Probe Nova GPU driver.\n");
+
+ pdev.enable_device_mem()?;
+ pdev.set_master();
+
+ let bar = pdev.iomap_region_sized::<BAR0_SIZE>(0, c_str!("nova"))?;
+
+ let p = pdev.clone();
+ let data = Arc::pin_init(
+ try_pin_init!(NovaData {
+ gpu <- Gpu::new(&p, bar)?,
+ pdev: p,
+ }),
+ GFP_KERNEL,
+ )?;
+
+ let drm = drm::device::Device::<NovaDriver>::new(pdev.as_ref(), data.clone())?;
+ drm::drv::Registration::new_foreign_owned(drm.clone(), 0)?;
+
+ Ok(KBox::new(Self(drm), GFP_KERNEL)?.into())
+ }
+}
+
+impl Drop for NovaDriver {
+ fn drop(&mut self) {
+ let data = self.0.data();
+
+ dev_dbg!(data.pdev.as_ref(), "Remove Nova GPU driver.\n");
+ }
+}
+
+#[vtable]
+impl drm::drv::Driver for NovaDriver {
+ type Data = Arc<NovaData>;
+ type File = File;
+ type Object = crate::gem::Object;
+
+ const INFO: drm::drv::DriverInfo = INFO;
+ const FEATURES: u32 = drv::FEAT_GEM;
+
+ kernel::declare_drm_ioctls! {
+ (NOVA_GETPARAM, drm_nova_getparam, ioctl::RENDER_ALLOW, File::get_param),
+ (NOVA_GEM_CREATE, drm_nova_gem_create, ioctl::AUTH | ioctl::RENDER_ALLOW, File::gem_create),
+ (NOVA_GEM_INFO, drm_nova_gem_info, ioctl::AUTH | ioctl::RENDER_ALLOW, File::gem_info),
+ }
+}
diff --git a/drivers/gpu/drm/nova/file.rs b/drivers/gpu/drm/nova/file.rs
new file mode 100644
index 0000000000000000000000000000000000000000..0cabaee327bbc504c6b1c5b51791b72ede07c3ce
--- /dev/null
+++ b/drivers/gpu/drm/nova/file.rs
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0
+
+use crate::driver::{NovaDevice, NovaDriver};
+use crate::gem;
+use kernel::{
+ alloc::flags::*,
+ drm::{self, device::Device as DrmDevice, gem::BaseObject},
+ prelude::*,
+ uapi,
+};
+
+pub(crate) struct File();
+
+/// Convenience type alias for our DRM `File` type
+pub(crate) type DrmFile = drm::file::File<File>;
+
+impl drm::file::DriverFile for File {
+ type Driver = NovaDriver;
+
+ fn open(dev: &DrmDevice<Self::Driver>) -> Result<Pin<KBox<Self>>> {
+ dev_dbg!(dev.as_ref(), "drm::device::Device::open\n");
+
+ Ok(KBox::new(Self(), GFP_KERNEL)?.into())
+ }
+}
+
+impl File {
+ /// IOCTL: get_param: Query GPU / driver metadata.
+ pub(crate) fn get_param(
+ dev: &NovaDevice,
+ getparam: &mut uapi::drm_nova_getparam,
+ _file: &DrmFile,
+ ) -> Result<u32> {
+ let pdev = &dev.data().pdev;
+
+ getparam.value = match getparam.param as u32 {
+ uapi::NOVA_GETPARAM_VRAM_BAR_SIZE => pdev.resource_len(1)?,
+ _ => return Err(EINVAL),
+ };
+
+ Ok(0)
+ }
+
+ /// IOCTL: gem_create: Create a new DRM GEM object.
+ pub(crate) fn gem_create(
+ dev: &NovaDevice,
+ req: &mut uapi::drm_nova_gem_create,
+ file: &DrmFile,
+ ) -> Result<u32> {
+ let obj = gem::object_new(dev, req.size.try_into()?)?;
+
+ let handle = obj.create_handle(file)?;
+ req.handle = handle;
+
+ Ok(0)
+ }
+
+ /// IOCTL: gem_info: Query GEM metadata.
+ pub(crate) fn gem_info(
+ _dev: &NovaDevice,
+ req: &mut uapi::drm_nova_gem_info,
+ file: &DrmFile,
+ ) -> Result<u32> {
+ let bo = gem::lookup_handle(file, req.handle)?;
+
+ req.size = bo.size().try_into()?;
+
+ Ok(0)
+ }
+}
diff --git a/drivers/gpu/drm/nova/gem.rs b/drivers/gpu/drm/nova/gem.rs
new file mode 100644
index 0000000000000000000000000000000000000000..51bc30c226e2948f4ce190e5e6bcc29ff8b5eff0
--- /dev/null
+++ b/drivers/gpu/drm/nova/gem.rs
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0
+
+use kernel::{
+ drm::{
+ gem,
+ gem::{BaseObject, ObjectRef},
+ },
+ prelude::*,
+};
+
+use crate::{
+ driver::{NovaDevice, NovaDriver},
+ file::DrmFile,
+};
+
+/// GEM Object inner driver data
+#[pin_data]
+pub(crate) struct DriverObject {}
+
+/// Type alias for the GEM object tyoe for this driver.
+pub(crate) type Object = gem::Object<DriverObject>;
+
+impl gem::BaseDriverObject<Object> for DriverObject {
+ fn new(dev: &NovaDevice, _size: usize) -> impl PinInit<Self, Error> {
+ dev_dbg!(dev.as_ref(), "DriverObject::new\n");
+ DriverObject {}
+ }
+}
+
+impl gem::DriverObject for DriverObject {
+ type Driver = NovaDriver;
+}
+
+/// Create a new DRM GEM object.
+pub(crate) fn object_new(dev: &NovaDevice, size: usize) -> Result<ObjectRef<Object>> {
+ let aligned_size = size.next_multiple_of(1 << 12);
+
+ if size == 0 || size > aligned_size {
+ return Err(EINVAL);
+ }
+
+ let gem = Object::new(dev, aligned_size)?;
+
+ Ok(ObjectRef::from_pinned_unique(gem))
+}
+
+/// Look up a GEM object handle for a `File` and return an `ObjectRef` for it.
+pub(crate) fn lookup_handle(file: &DrmFile, handle: u32) -> Result<ObjectRef<Object>> {
+ Object::lookup_handle(file, handle)
+}
diff --git a/drivers/gpu/drm/nova/gpu.rs b/drivers/gpu/drm/nova/gpu.rs
new file mode 100644
index 0000000000000000000000000000000000000000..2b8f34ac219896100d946b940c48b80680f2adac
--- /dev/null
+++ b/drivers/gpu/drm/nova/gpu.rs
@@ -0,0 +1,173 @@
+// SPDX-License-Identifier: GPL-2.0
+
+use kernel::{
+ device, devres::Devres, error::code::*, firmware, fmt, pci, prelude::*, str::CString,
+};
+
+use crate::driver::Bar0;
+use core::fmt::Debug;
+
+/// Enum representing the GPU chipset.
+#[derive(Debug)]
+pub(crate) enum Chipset {
+ TU102 = 0x162,
+ TU104 = 0x164,
+ TU106 = 0x166,
+ TU117 = 0x167,
+ TU116 = 0x168,
+ GA102 = 0x172,
+ GA103 = 0x173,
+ GA104 = 0x174,
+ GA106 = 0x176,
+ GA107 = 0x177,
+ AD102 = 0x192,
+ AD103 = 0x193,
+ AD104 = 0x194,
+ AD106 = 0x196,
+ AD107 = 0x197,
+}
+
+/// Enum representing the GPU generation.
+#[derive(Debug)]
+pub(crate) enum CardType {
+ /// Turing
+ TU100 = 0x160,
+ /// Ampere
+ GA100 = 0x170,
+ /// Ada Lovelace
+ AD100 = 0x190,
+}
+
+/// Structure holding the metadata of the GPU.
+#[allow(dead_code)]
+pub(crate) struct GpuSpec {
+ /// Contents of the boot0 register.
+ boot0: u64,
+ card_type: CardType,
+ chipset: Chipset,
+ /// The revision of the chipset.
+ chiprev: u8,
+}
+
+/// Structure encapsulating the firmware blobs required for the GPU to operate.
+#[allow(dead_code)]
+pub(crate) struct Firmware {
+ booter_load: firmware::Firmware,
+ booter_unload: firmware::Firmware,
+ gsp: firmware::Firmware,
+}
+
+/// Structure holding the resources required to operate the GPU.
+#[allow(dead_code)]
+#[pin_data]
+pub(crate) struct Gpu {
+ spec: GpuSpec,
+ /// MMIO mapping of PCI BAR 0
+ bar: Devres<Bar0>,
+ fw: Firmware,
+}
+
+// TODO replace with something like derive(FromPrimitive)
+impl Chipset {
+ fn from_u32(value: u32) -> Option<Chipset> {
+ match value {
+ 0x162 => Some(Chipset::TU102),
+ 0x164 => Some(Chipset::TU104),
+ 0x166 => Some(Chipset::TU106),
+ 0x167 => Some(Chipset::TU117),
+ 0x168 => Some(Chipset::TU116),
+ 0x172 => Some(Chipset::GA102),
+ 0x173 => Some(Chipset::GA103),
+ 0x174 => Some(Chipset::GA104),
+ 0x176 => Some(Chipset::GA106),
+ 0x177 => Some(Chipset::GA107),
+ 0x192 => Some(Chipset::AD102),
+ 0x193 => Some(Chipset::AD103),
+ 0x194 => Some(Chipset::AD104),
+ 0x196 => Some(Chipset::AD106),
+ 0x197 => Some(Chipset::AD107),
+ _ => None,
+ }
+ }
+}
+
+// TODO replace with something like derive(FromPrimitive)
+impl CardType {
+ fn from_u32(value: u32) -> Option<CardType> {
+ match value {
+ 0x160 => Some(CardType::TU100),
+ 0x170 => Some(CardType::GA100),
+ 0x190 => Some(CardType::AD100),
+ _ => None,
+ }
+ }
+}
+
+impl GpuSpec {
+ fn new(bar: &Devres<Bar0>) -> Result<GpuSpec> {
+ let bar = bar.try_access().ok_or(ENXIO)?;
+ let boot0 = u64::from_le(bar.readq(0));
+ let chip = ((boot0 & 0x1ff00000) >> 20) as u32;
+
+ if boot0 & 0x1f000000 == 0 {
+ return Err(ENODEV);
+ }
+
+ let chipset = match Chipset::from_u32(chip) {
+ Some(x) => x,
+ None => return Err(ENODEV),
+ };
+
+ let card_type = match CardType::from_u32(chip & 0x1f0) {
+ Some(x) => x,
+ None => return Err(ENODEV),
+ };
+
+ Ok(Self {
+ boot0,
+ card_type,
+ chipset,
+ chiprev: (boot0 & 0xff) as u8,
+ })
+ }
+}
+
+impl Firmware {
+ fn new(dev: &device::Device, spec: &GpuSpec, ver: &str) -> Result<Firmware> {
+ let mut chip_name = CString::try_from_fmt(fmt!("{:?}", spec.chipset))?;
+ chip_name.make_ascii_lowercase();
+
+ let fw_booter_load_path =
+ CString::try_from_fmt(fmt!("nvidia/{}/gsp/booter_load-{}.bin", &*chip_name, ver,))?;
+ let fw_booter_unload_path =
+ CString::try_from_fmt(fmt!("nvidia/{}/gsp/booter_unload-{}.bin", &*chip_name, ver))?;
+ let fw_gsp_path =
+ CString::try_from_fmt(fmt!("nvidia/{}/gsp/gsp-{}.bin", &*chip_name, ver))?;
+
+ let booter_load = firmware::Firmware::request(&fw_booter_load_path, dev)?;
+ let booter_unload = firmware::Firmware::request(&fw_booter_unload_path, dev)?;
+ let gsp = firmware::Firmware::request(&fw_gsp_path, dev)?;
+
+ Ok(Firmware {
+ booter_load,
+ booter_unload,
+ gsp,
+ })
+ }
+}
+
+impl Gpu {
+ pub(crate) fn new(pdev: &pci::Device, bar: Devres<Bar0>) -> Result<impl PinInit<Self>> {
+ let spec = GpuSpec::new(&bar)?;
+ let fw = Firmware::new(pdev.as_ref(), &spec, "535.113.01")?;
+
+ dev_info!(
+ pdev.as_ref(),
+ "NVIDIA {:?} ({:#x})",
+ spec.chipset,
+ spec.boot0
+ );
+
+ Ok(pin_init!(Self { spec, bar, fw }))
+ }
+}
diff --git a/drivers/gpu/drm/nova/nova.rs b/drivers/gpu/drm/nova/nova.rs
new file mode 100644
index 0000000000000000000000000000000000000000..c675be404d9be216208998f384f06b83dbade7e7
--- /dev/null
+++ b/drivers/gpu/drm/nova/nova.rs
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0
+
+//! Nova GPU Driver
+
+mod driver;
+mod file;
+mod gem;
+mod gpu;
+
+use crate::driver::NovaDriver;
+
+kernel::module_pci_driver! {
+ type: NovaDriver,
+ name: "Nova",
+ author: "Danilo Krummrich",
+ description: "Nova GPU driver",
+ license: "GPL v2",
+}
diff --git a/include/uapi/drm/nova_drm.h b/include/uapi/drm/nova_drm.h
new file mode 100644
index 0000000000000000000000000000000000000000..3ca90ed9d2bb1aee23d4ac2fbcbf0f7d36f7dee5
--- /dev/null
+++ b/include/uapi/drm/nova_drm.h
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: MIT */
+
+#ifndef __NOVA_DRM_H__
+#define __NOVA_DRM_H__
+
+#include "drm.h"
+
+/* DISCLAIMER: Do not use, this is not a stable uAPI.
+ *
+ * This uAPI serves only testing purposes as long as this driver is still in
+ * development. It is required to implement and test infrastructure which is
+ * upstreamed in the context of this driver. See also [1].
+ *
+ * [1] https://lore.kernel.org/dri-devel/Zfsj0_tb-0-tNrJy@cassiopeiae/T/#u
+ */
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/*
+ * NOVA_GETPARAM_VRAM_BAR_SIZE
+ *
+ * Query the VRAM BAR size in bytes.
+ */
+#define NOVA_GETPARAM_VRAM_BAR_SIZE 0x1
+
+/**
+ * struct drm_nova_getparam - query GPU and driver metadata
+ */
+struct drm_nova_getparam {
+ /**
+ * @param: The identifier of the parameter to query.
+ */
+ __u64 param;
+
+ /**
+ * @value: The value for the specified parameter.
+ */
+ __u64 value;
+};
+
+/**
+ * struct drm_nova_gem_create - create a new DRM GEM object
+ */
+struct drm_nova_gem_create {
+ /**
+ * @handle: The handle of the new DRM GEM object.
+ */
+ __u32 handle;
+
+ /**
+ * @pad: 32 bit padding, should be 0.
+ */
+ __u32 pad;
+
+ /**
+ * @size: The size of the new DRM GEM object.
+ */
+ __u64 size;
+};
+
+/**
+ * struct drm_nova_gem_info - query DRM GEM object metadata
+ */
+struct drm_nova_gem_info {
+ /**
+ * @handle: The handle of the DRM GEM object to query.
+ */
+ __u32 handle;
+
+ /**
+ * @pad: 32 bit padding, should be 0.
+ */
+ __u32 pad;
+
+ /**
+ * @size: The size of the DRM GEM obejct.
+ */
+ __u64 size;
+};
+
+#define DRM_NOVA_GETPARAM 0x00
+#define DRM_NOVA_GEM_CREATE 0x01
+#define DRM_NOVA_GEM_INFO 0x02
+
+/* Note: this is an enum so that it can be resolved by Rust bindgen. */
+enum {
+ DRM_IOCTL_NOVA_GETPARAM = DRM_IOWR(DRM_COMMAND_BASE + DRM_NOVA_GETPARAM,
+ struct drm_nova_getparam),
+ DRM_IOCTL_NOVA_GEM_CREATE = DRM_IOWR(DRM_COMMAND_BASE + DRM_NOVA_GEM_CREATE,
+ struct drm_nova_gem_create),
+ DRM_IOCTL_NOVA_GEM_INFO = DRM_IOWR(DRM_COMMAND_BASE + DRM_NOVA_GEM_INFO,
+ struct drm_nova_gem_info),
+};
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __NOVA_DRM_H__ */
diff --git a/rust/uapi/uapi_helper.h b/rust/uapi/uapi_helper.h
index 19587e55e604128d405a0cffa5059e75273199d3..1409441359f510236256bc17851f9aac65c45c4e 100644
--- a/rust/uapi/uapi_helper.h
+++ b/rust/uapi/uapi_helper.h
@@ -8,6 +8,7 @@
#include <uapi/asm-generic/ioctl.h>
#include <uapi/drm/drm.h>
+#include <uapi/drm/nova_drm.h>
#include <uapi/linux/mdio.h>
#include <uapi/linux/mii.h>
#include <uapi/linux/ethtool.h>