[PATCH 1/2] gpu: nova-core: convert to kernel bitfield macro
From: Alexandre Courbot
Date: Wed Jun 17 2026 - 10:09:49 EST
Replace uses of the Nova-local `bitfield!` macro with the kernel one.
Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
Acked-by: Danilo Krummrich <dakr@xxxxxxxxxx>
---
drivers/gpu/nova-core/fsp.rs | 8 +++-
drivers/gpu/nova-core/gsp/fw.rs | 11 ++---
drivers/gpu/nova-core/mctp.rs | 86 +++++++++++++++++++-------------------
drivers/gpu/nova-core/nova_core.rs | 3 --
4 files changed, 56 insertions(+), 52 deletions(-)
diff --git a/drivers/gpu/nova-core/fsp.rs b/drivers/gpu/nova-core/fsp.rs
index d949c03dd304..e8becf11a321 100644
--- a/drivers/gpu/nova-core/fsp.rs
+++ b/drivers/gpu/nova-core/fsp.rs
@@ -11,6 +11,7 @@
device,
dma::Coherent,
io::poll::read_poll_timeout,
+ num::TryIntoBounded,
prelude::*,
ptr::{
Alignable,
@@ -297,7 +298,12 @@ fn send_sync_fsp<M>(&mut self, dev: &device::Device, bar: Bar0<'_>, msg: &M) ->
return Err(EIO);
}
- if command_nvdm_type != u8::from(M::NVDM_TYPE).into() {
+ if command_nvdm_type
+ .try_into_bounded()
+ .ok_or(EINVAL)
+ .and_then(NvdmType::try_from)?
+ != M::NVDM_TYPE
+ {
dev_err!(
dev,
"Expected NVDM type {:?} in reply, got {:#x}\n",
diff --git a/drivers/gpu/nova-core/gsp/fw.rs b/drivers/gpu/nova-core/gsp/fw.rs
index 4db0cfa4dc4d..5a8392b33b4a 100644
--- a/drivers/gpu/nova-core/gsp/fw.rs
+++ b/drivers/gpu/nova-core/gsp/fw.rs
@@ -10,6 +10,7 @@
use core::ops::Range;
use kernel::{
+ bitfield,
dma::Coherent,
prelude::*,
ptr::{
@@ -742,8 +743,8 @@ unsafe impl AsBytes for MsgqRxHeader {}
bitfield! {
struct MsgHeaderVersion(u32) {
- 31:24 major as u8;
- 23:16 minor as u8;
+ 31:24 major;
+ 23:16 minor;
}
}
@@ -752,9 +753,9 @@ impl MsgHeaderVersion {
const MINOR_TOT: u8 = 0;
fn new() -> Self {
- Self::default()
- .set_major(Self::MAJOR_TOT)
- .set_minor(Self::MINOR_TOT)
+ Self::zeroed()
+ .with_major(Self::MAJOR_TOT)
+ .with_minor(Self::MINOR_TOT)
}
}
diff --git a/drivers/gpu/nova-core/mctp.rs b/drivers/gpu/nova-core/mctp.rs
index 482786e07bc7..acc2abbd4b0c 100644
--- a/drivers/gpu/nova-core/mctp.rs
+++ b/drivers/gpu/nova-core/mctp.rs
@@ -7,55 +7,51 @@
//! Data Model) messages between the kernel driver and GPU firmware processors
//! such as FSP and GSP.
-use kernel::pci::Vendor;
+use kernel::{
+ bitfield,
+ pci::Vendor,
+ prelude::*, //
+};
-/// NVDM message type identifiers carried over MCTP.
-#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
-#[repr(u8)]
-pub(crate) enum NvdmType {
- #[default]
- /// Chain of Trust boot message.
- Cot = 0x14,
- /// FSP command response.
- FspResponse = 0x15,
-}
+use crate::{
+ bounded_enum,
+ num, //
+};
-impl TryFrom<u8> for NvdmType {
- type Error = u8;
-
- fn try_from(value: u8) -> Result<Self, Self::Error> {
- match value {
- x if x == u8::from(Self::Cot) => Ok(Self::Cot),
- x if x == u8::from(Self::FspResponse) => Ok(Self::FspResponse),
- _ => Err(value),
- }
- }
-}
-
-impl From<NvdmType> for u8 {
- fn from(value: NvdmType) -> Self {
- value as u8
+bounded_enum! {
+ /// NVDM message type identifiers carried over MCTP.
+ #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+ pub(crate) enum NvdmType with TryFrom<Bounded<u32, 8>> {
+ /// Chain of Trust boot message.
+ Cot = 0x14,
+ /// FSP command response.
+ FspResponse = 0x15,
}
}
bitfield! {
- pub(crate) struct MctpHeader(u32), "MCTP transport header for NVIDIA firmware messages." {
- 31:31 som as bool, "Start-of-message bit.";
- 30:30 eom as bool, "End-of-message bit.";
- 29:28 seq as u8, "Packet sequence number.";
- 23:16 seid as u8, "Source endpoint ID.";
+ /// MCTP transport header for NVIDIA firmware messages.
+ pub(crate) struct MctpHeader(u32) {
+ /// Start-of-message bit.
+ 31:31 som;
+ /// End-of-message bit.
+ 30:30 eom;
+ /// Packet sequence number.
+ 29:28 seq;
+ /// Source endpoint ID.
+ 23:16 seid;
}
}
impl MctpHeader {
/// Builds a single-packet MCTP header (`SOM=1`, `EOM=1`, `SEQ=0`, `SEID=0`).
pub(crate) fn single_packet() -> Self {
- Self::default().set_som(true).set_eom(true)
+ Self::zeroed().with_som(true).with_eom(true)
}
/// Returns whether this is a complete single-packet message (`SOM=1` and `EOM=1`).
pub(crate) fn is_single_packet(self) -> bool {
- self.som() && self.eom()
+ self.som().into_bool() && self.eom().into_bool()
}
}
@@ -63,26 +59,30 @@ pub(crate) fn is_single_packet(self) -> bool {
const MSG_TYPE_VENDOR_PCI: u8 = 0x7e;
bitfield! {
- pub(crate) struct NvdmHeader(u32), "NVIDIA Vendor-Defined Message header over MCTP." {
- 31:24 nvdm_type as u8 ?=> NvdmType, "NVDM message type.";
- 23:8 vendor_id as u16, "PCI vendor ID.";
- 6:0 msg_type as u8, "MCTP vendor-defined message type.";
+ /// NVIDIA Vendor-Defined Message header over MCTP.
+ pub(crate) struct NvdmHeader(u32) {
+ /// NVDM message type.
+ 31:24 nvdm_type ?=> NvdmType;
+ /// PCI vendor ID.
+ 23:8 vendor_id;
+ /// MCTP vendor-defined message type.
+ 6:0 msg_type;
}
}
impl NvdmHeader {
/// Builds an NVDM header for the given message type.
pub(crate) fn new(nvdm_type: NvdmType) -> Self {
- Self::default()
- .set_msg_type(MSG_TYPE_VENDOR_PCI)
- .set_vendor_id(Vendor::NVIDIA.as_raw())
- .set_nvdm_type(nvdm_type)
+ Self::zeroed()
+ .with_const_msg_type::<{ num::u8_as_u32(MSG_TYPE_VENDOR_PCI) }>()
+ .with_vendor_id(Vendor::NVIDIA.as_raw())
+ .with_nvdm_type(nvdm_type)
}
/// Validates this header against the expected NVIDIA NVDM format and type.
pub(crate) fn validate(self, expected_type: NvdmType) -> bool {
- self.msg_type() == MSG_TYPE_VENDOR_PCI
- && self.vendor_id() == Vendor::NVIDIA.as_raw()
+ u8::from(self.msg_type()) == MSG_TYPE_VENDOR_PCI
+ && u16::from(self.vendor_id()) == Vendor::NVIDIA.as_raw()
&& matches!(self.nvdm_type(), Ok(nvdm_type) if nvdm_type == expected_type)
}
}
diff --git a/drivers/gpu/nova-core/nova_core.rs b/drivers/gpu/nova-core/nova_core.rs
index 735b8e17c6b6..a61406ba5c0b 100644
--- a/drivers/gpu/nova-core/nova_core.rs
+++ b/drivers/gpu/nova-core/nova_core.rs
@@ -10,9 +10,6 @@
InPlaceModule, //
};
-#[macro_use]
-mod bitfield;
-
mod driver;
mod falcon;
mod fb;
--
2.54.0