@@ -6863,6 +6863,16 @@ 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@redhat.com>
+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
@@ -274,6 +274,8 @@ 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"
@@ -143,6 +143,7 @@ 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/
new file mode 100644
@@ -0,0 +1,11 @@
+config DRM_NOVA_STUB
+ tristate "Nova GPU driver stub"
+ depends on DRM
+ depends on PCI
+ depends on RUST
+ 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.
new file mode 100644
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_DRM_NOVA_STUB) += nova.o
new file mode 100644
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0
+
+use alloc::boxed::Box;
+use core::pin::Pin;
+use kernel::{
+ bindings, c_str, device, driver, drm,
+ drm::{drv, ioctl},
+ pci,
+ pci::define_pci_id_table,
+ prelude::*,
+ sync::Arc,
+};
+
+use crate::{file::File, gpu::Gpu};
+
+pub(crate) struct NovaDriver;
+
+/// Convienence type alias for the DRM device type for this driver
+pub(crate) type NovaDevice = drm::device::Device<NovaDriver>;
+
+#[allow(dead_code)]
+pub(crate) struct NovaData {
+ pub(crate) gpu: Arc<Gpu>,
+ pub(crate) pdev: pci::Device,
+}
+
+type DeviceData = device::Data<drm::drv::Registration<NovaDriver>, NovaData>;
+
+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"),
+};
+
+impl pci::Driver for NovaDriver {
+ type Data = Arc<DeviceData>;
+
+ define_pci_id_table! {
+ (),
+ [ (pci::DeviceId::new(bindings::PCI_VENDOR_ID_NVIDIA, bindings::PCI_ANY_ID as u32), None) ]
+ }
+
+ fn probe(pdev: &mut pci::Device, _id_info: Option<&Self::IdInfo>) -> Result<Arc<DeviceData>> {
+ dev_dbg!(pdev.as_ref(), "Probe Nova GPU driver.\n");
+
+ let reg = drm::drv::Registration::<NovaDriver>::new(pdev.as_ref())?;
+
+ pdev.enable_device_mem()?;
+ pdev.set_master();
+
+ let bar = pdev.iomap_region(0, c_str!("nova"))?;
+
+ let gpu = Gpu::new(pdev, bar)?;
+
+ let data = kernel::new_device_data!(
+ reg,
+ NovaData {
+ gpu,
+ pdev: pdev.clone(),
+ },
+ "NovaData"
+ )?;
+ let data: Arc<DeviceData> = data.into();
+
+ kernel::drm_device_register!(
+ data.registrations().ok_or(ENXIO)?.as_pinned_mut(),
+ data.clone(),
+ 0
+ )?;
+
+ Ok(data)
+ }
+
+ fn remove(data: &Self::Data) {
+ dev_dbg!(data.pdev.as_ref(), "Remove Nova GPU driver.\n");
+ }
+}
+
+#[vtable]
+impl drm::drv::Driver for NovaDriver {
+ type Data = Arc<DeviceData>;
+ 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),
+ }
+}
+
+pub(crate) struct NovaModule {
+ _registration: Pin<Box<driver::Registration<pci::Adapter<NovaDriver>>>>,
+}
+
+impl kernel::Module for NovaModule {
+ fn init(_name: &'static CStr, module: &'static ThisModule) -> Result<Self> {
+ let registration = driver::Registration::new_pinned(c_str!("nova"), module)?;
+
+ Ok(Self {
+ _registration: registration,
+ })
+ }
+}
new file mode 100644
@@ -0,0 +1,71 @@
+// 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<Box<Self>>> {
+ dev_dbg!(dev.as_ref(), "drm::device::Device::open\n");
+
+ Ok(Box::into_pin(Box::new(Self(), GFP_KERNEL)?))
+ }
+}
+
+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 data = dev.data().ok_or(ENODEV)?;
+ let pdev = &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)
+ }
+}
new file mode 100644
@@ -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)
+}
new file mode 100644
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: GPL-2.0
+
+use kernel::{
+ device, devres::Devres, error::code::*, firmware, fmt, pci, prelude::*, str::CString, sync::Arc,
+};
+
+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<pci::Bar>,
+ 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<pci::Bar>) -> 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<pci::Bar>) -> Result<Arc<Gpu>> {
+ 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
+ );
+
+ Arc::pin_init(try_pin_init!(Self { spec, bar, fw }), GFP_KERNEL)
+ }
+}
new file mode 100644
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: GPL-2.0
+
+//! Nova GPU Driver
+
+mod driver;
+mod file;
+mod gem;
+mod gpu;
+
+use kernel::prelude::module;
+
+use driver::NovaModule;
+
+module! {
+ type: NovaModule,
+ name: "Nova",
+ author: "Danilo Krummrich",
+ description: "Nova GPU driver",
+ license: "GPL v2",
+}
new file mode 100644
@@ -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__ */
@@ -8,5 +8,6 @@
#include <uapi/asm-generic/ioctl.h>
#include <uapi/drm/drm.h>
+#include <uapi/drm/nova_drm.h>
#include <uapi/linux/mii.h>
#include <uapi/linux/ethtool.h>
Add the initial driver stub of Nova, a Rust-based GSP-only driver for Nvidia GPUs. Nova, in the long term, is intended to serve as the successor of Nouveau for GSP-firmware-based GPUs. [1] As a stub driver Nova's focus is to make use of the most basic device / driver infrastructure required to build a DRM driver on the PCI bus and serve as demonstration example and justification for this infrastructure. In further consequence, the idea is to develop Nova continuously upstream, using those increments to lift further Rust abstractions and infrastructure upstream. Link: https://lore.kernel.org/dri-devel/Zfsj0_tb-0-tNrJy@cassiopeiae/T/#u [1] Signed-off-by: Danilo Krummrich <dakr@redhat.com> --- MAINTAINERS | 10 ++ drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/nova/Kconfig | 11 +++ drivers/gpu/drm/nova/Makefile | 3 + drivers/gpu/drm/nova/driver.rs | 110 +++++++++++++++++++++ drivers/gpu/drm/nova/file.rs | 71 ++++++++++++++ drivers/gpu/drm/nova/gem.rs | 50 ++++++++++ drivers/gpu/drm/nova/gpu.rs | 172 +++++++++++++++++++++++++++++++++ drivers/gpu/drm/nova/nova.rs | 20 ++++ include/uapi/drm/nova_drm.h | 101 +++++++++++++++++++ rust/uapi/uapi_helper.h | 1 + 12 files changed, 552 insertions(+) create mode 100644 drivers/gpu/drm/nova/Kconfig create mode 100644 drivers/gpu/drm/nova/Makefile create mode 100644 drivers/gpu/drm/nova/driver.rs create mode 100644 drivers/gpu/drm/nova/file.rs create mode 100644 drivers/gpu/drm/nova/gem.rs create mode 100644 drivers/gpu/drm/nova/gpu.rs create mode 100644 drivers/gpu/drm/nova/nova.rs create mode 100644 include/uapi/drm/nova_drm.h