nova: initial pci driver skeleton

Signed-off-by: Danilo Krummrich <dakr@redhat.com>

5 files changed, 82 insertions, 0 deletions

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 3caa020391c7..bf5d88cfe9c8 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -266,6 +266,8 @@ 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/kmb/Kconfig"
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 215e78e79125..840cd32f52c8 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -153,6 +153,7 @@ obj-$(CONFIG_DRM_VMWGFX)+= vmwgfx/
 obj-$(CONFIG_DRM_VGEM)	+= vgem/
 obj-$(CONFIG_DRM_VKMS)	+= vkms/
 obj-$(CONFIG_DRM_NOUVEAU) +=nouveau/
+obj-$(CONFIG_DRM_NOVA) += nova/
 obj-$(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 000000000000..bd04a412b62e
--- /dev/null
+++ b/drivers/gpu/drm/nova/Kconfig
@@ -0,0 +1,3 @@
+config DRM_NOVA
+	tristate "Nova GPU driver"
+	depends on RUST
diff --git a/drivers/gpu/drm/nova/Makefile b/drivers/gpu/drm/nova/Makefile
new file mode 100644
index 000000000000..6fbb32893ecc
--- /dev/null
+++ b/drivers/gpu/drm/nova/Makefile
@@ -0,0 +1,3 @@
+nova-y += nova_drv.o
+
+obj-$(CONFIG_DRM_NOVA) += nova.o
diff --git a/drivers/gpu/drm/nova/nova_drv.rs b/drivers/gpu/drm/nova/nova_drv.rs
new file mode 100644
index 000000000000..9eeb69cb7e3e
--- /dev/null
+++ b/drivers/gpu/drm/nova/nova_drv.rs
@@ -0,0 +1,73 @@
+/// Nova GPU Driver
+
+// For now, catch 'em all!
+use alloc::boxed::Box;
+use core::{
+    cell::UnsafeCell,
+    convert::TryInto,
+    format_args,
+    pin::Pin,
+    sync::atomic::{AtomicU16, AtomicU32, AtomicU64, Ordering},
+};
+use kernel::{
+    bindings,
+    c_str,
+    device::{self, Device, RawDevice},
+    dma, driver,
+    error::code::*,
+    io_mem::IoMem,
+    new_mutex, new_spinlock, pci,
+    pci::define_pci_id_table,
+    prelude::*,
+    stack_pin_init,
+    sync::Mutex,
+    sync::{Arc, SpinLock},
+    types::AtomicOptionalBoxedPtr,
+};
+
+struct NovaDevice;
+
+impl pci::Driver for NovaDevice {
+
+    define_pci_id_table! {
+        (),
+        [ (pci::DeviceId::new(bindings::PCI_VENDOR_ID_NVIDIA, bindings::PCI_ANY_ID as u32), None) ]
+    }
+
+    fn probe(_dev: &mut pci::Device, _id_info: Option<&Self::IdInfo>) -> Result {
+        pr_info!("probe()\n");
+
+        Ok(())
+    }
+
+    fn remove(_data: &Self::Data) {
+        pr_info!("remove()\n");
+    }
+}
+
+struct NovaModule {
+    _registration: Pin<Box<driver::Registration<pci::Adapter<NovaDevice>>>>,
+}
+
+impl kernel::Module for NovaModule {
+    fn init(_name: &'static CStr, module: &'static ThisModule) -> Result<Self> {
+        pr_info!("Module loaded!\n");
+
+        let registration = driver::Registration::new_pinned(c_str!("nova"), module)?;
+        pr_info!("Registerd PCI driver.\n");
+
+        Ok(Self {
+            _registration: registration,
+        })
+    }
+}
+
+module! {
+    type: NovaModule,
+    name: "Nova",
+    author: "Danilo Krummrich",
+    description: "Nova GPU driver",
+    license: "GPL v2",
+    params: {
+    },
+}