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Message-ID: <20250930131648.411720-8-apopple@nvidia.com>
Date: Tue, 30 Sep 2025 23:16:40 +1000
From: Alistair Popple <apopple@...dia.com>
To: rust-for-linux@...r.kernel.org,
dri-devel@...ts.freedesktop.org,
dakr@...nel.org,
acourbot@...dia.com
Cc: Alistair Popple <apopple@...dia.com>,
Miguel Ojeda <ojeda@...nel.org>,
Alex Gaynor <alex.gaynor@...il.com>,
Boqun Feng <boqun.feng@...il.com>,
Gary Guo <gary@...yguo.net>,
Björn Roy Baron <bjorn3_gh@...tonmail.com>,
Benno Lossin <lossin@...nel.org>,
Andreas Hindborg <a.hindborg@...nel.org>,
Alice Ryhl <aliceryhl@...gle.com>,
Trevor Gross <tmgross@...ch.edu>,
David Airlie <airlied@...il.com>,
Simona Vetter <simona@...ll.ch>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
John Hubbard <jhubbard@...dia.com>,
Joel Fernandes <joelagnelf@...dia.com>,
Timur Tabi <ttabi@...dia.com>,
linux-kernel@...r.kernel.org,
nouveau@...ts.freedesktop.org
Subject: [PATCH v3 07/13] gpu: nova-core: gsp: Create rmargs
Initialise the GSP resource manager arguments (rmargs) which provide
initialisation parameters to the GSP firmware during boot. The rmargs
structure contains arguments to configure the GSP message/command queue
location.
These are mapped for coherent DMA and added to the libos data structure
for access when booting GSP.
Signed-off-by: Alistair Popple <apopple@...dia.com>
---
Changes for v2:
- Rebased on Alex's latest series
---
drivers/gpu/nova-core/gsp.rs | 16 +++++
drivers/gpu/nova-core/gsp/cmdq.rs | 24 +++++++-
drivers/gpu/nova-core/gsp/fw.rs | 60 +++++++++++++++++++
.../gpu/nova-core/gsp/fw/r570_144/bindings.rs | 33 ++++++++++
4 files changed, 130 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/nova-core/gsp.rs b/drivers/gpu/nova-core/gsp.rs
index 3132f1009897..9e5dd9e5a316 100644
--- a/drivers/gpu/nova-core/gsp.rs
+++ b/drivers/gpu/nova-core/gsp.rs
@@ -3,6 +3,7 @@
mod boot;
mod fw;
+use fw::GspArgumentsCached;
pub(crate) use fw::{GspFwWprMeta, LibosParams};
use kernel::alloc::flags::GFP_KERNEL;
@@ -37,6 +38,7 @@ pub(crate) struct Gsp {
pub logintr: CoherentAllocation<u8>,
pub logrm: CoherentAllocation<u8>,
pub cmdq: Cmdq,
+ rmargs: CoherentAllocation<GspArgumentsCached>,
}
#[repr(C)]
@@ -93,12 +95,26 @@ pub(crate) fn new(pdev: &pci::Device<device::Bound>) -> Result<impl PinInit<Self
// Creates its own PTE array
let cmdq = Cmdq::new(dev)?;
+ let rmargs = CoherentAllocation::<GspArgumentsCached>::alloc_coherent(
+ dev,
+ 1,
+ GFP_KERNEL | __GFP_ZERO,
+ )?;
+ dma_write!(libos[3] = LibosMemoryRegionInitArgument::new("RMARGS", &rmargs))?;
+
+ dma_write!(
+ rmargs[0] = fw::GspArgumentsCached::new(
+ fw::MessageQueueInitArguments::new(&cmdq),
+ fw::GspSrInitArguments::new()
+ )
+ )?;
Ok(try_pin_init!(Self {
libos,
loginit,
logintr,
logrm,
+ rmargs,
cmdq,
}))
}
diff --git a/drivers/gpu/nova-core/gsp/cmdq.rs b/drivers/gpu/nova-core/gsp/cmdq.rs
index 7d43dc987ba2..2fd6b31db9e9 100644
--- a/drivers/gpu/nova-core/gsp/cmdq.rs
+++ b/drivers/gpu/nova-core/gsp/cmdq.rs
@@ -6,7 +6,7 @@
use kernel::alloc::flags::GFP_KERNEL;
use kernel::device;
-use kernel::dma::CoherentAllocation;
+use kernel::dma::{CoherentAllocation, DmaAddress};
use kernel::dma_write;
use kernel::prelude::*;
use kernel::sync::aref::ARef;
@@ -202,10 +202,25 @@ pub(crate) struct Cmdq {
dev: ARef<device::Device>,
seq: u32,
gsp_mem: DmaGspMem,
- pub _nr_ptes: u32,
}
impl Cmdq {
+ /// Offset of the data after the PTEs.
+ const POST_PTE_OFFSET: usize = core::mem::offset_of!(GspMem, cpuq);
+
+ /// Offset of command queue ring buffer.
+ pub(crate) const CMDQ_OFFSET: usize = core::mem::offset_of!(GspMem, cpuq)
+ + core::mem::offset_of!(Msgq, msgq)
+ - Self::POST_PTE_OFFSET;
+
+ /// Offset of message queue ring buffer.
+ pub(crate) const STATQ_OFFSET: usize = core::mem::offset_of!(GspMem, gspq)
+ + core::mem::offset_of!(Msgq, msgq)
+ - Self::POST_PTE_OFFSET;
+
+ /// Number of page table entries for the GSP shared region.
+ pub(crate) const NUM_PTES: usize = size_of::<GspMem>() >> GSP_PAGE_SHIFT;
+
pub(crate) fn new(dev: &device::Device<device::Bound>) -> Result<Cmdq> {
let gsp_mem = DmaGspMem::new(dev)?;
let nr_ptes = size_of::<GspMem>() >> GSP_PAGE_SHIFT;
@@ -215,7 +230,6 @@ pub(crate) fn new(dev: &device::Device<device::Bound>) -> Result<Cmdq> {
dev: dev.into(),
seq: 0,
gsp_mem,
- _nr_ptes: nr_ptes as u32,
})
}
@@ -399,4 +413,8 @@ pub(crate) fn receive_msg_from_gsp<M: MessageFromGsp, R>(
.advance_cpu_read_ptr(msg_header.length().div_ceil(GSP_PAGE_SIZE as u32));
result
}
+
+ pub(crate) fn dma_handle(&self) -> DmaAddress {
+ self.gsp_mem.0.dma_handle()
+ }
}
diff --git a/drivers/gpu/nova-core/gsp/fw.rs b/drivers/gpu/nova-core/gsp/fw.rs
index ee86abe7ea10..aec0db50adea 100644
--- a/drivers/gpu/nova-core/gsp/fw.rs
+++ b/drivers/gpu/nova-core/gsp/fw.rs
@@ -17,6 +17,7 @@
use crate::firmware::gsp::GspFirmware;
use crate::gpu::Chipset;
use crate::gsp;
+use crate::gsp::cmdq::Cmdq;
use crate::gsp::FbLayout;
use crate::gsp::GSP_PAGE_SIZE;
@@ -453,3 +454,62 @@ unsafe impl AsBytes for GspMsgElement {}
// SAFETY: This struct only contains integer types for which all bit patterns
// are valid.
unsafe impl FromBytes for GspMsgElement {}
+
+#[repr(transparent)]
+pub(crate) struct GspArgumentsCached(bindings::GSP_ARGUMENTS_CACHED);
+
+impl GspArgumentsCached {
+ pub(crate) fn new(
+ queue_arguments: MessageQueueInitArguments,
+ sr_arguments: GspSrInitArguments,
+ ) -> Self {
+ Self(bindings::GSP_ARGUMENTS_CACHED {
+ messageQueueInitArguments: queue_arguments.0,
+ srInitArguments: sr_arguments.0,
+ bDmemStack: 1,
+ ..Default::default()
+ })
+ }
+}
+
+impl From<GspArgumentsCached> for bindings::GSP_ARGUMENTS_CACHED {
+ fn from(value: GspArgumentsCached) -> Self {
+ value.0
+ }
+}
+
+// SAFETY: Padding is explicit and will not contain uninitialized data.
+unsafe impl AsBytes for GspArgumentsCached {}
+
+// SAFETY: This struct only contains integer types for which all bit patterns
+// are valid.
+unsafe impl FromBytes for GspArgumentsCached {}
+
+#[repr(transparent)]
+pub(crate) struct MessageQueueInitArguments(bindings::MESSAGE_QUEUE_INIT_ARGUMENTS);
+
+impl MessageQueueInitArguments {
+ pub(crate) fn new(cmdq: &Cmdq) -> Self {
+ Self(bindings::MESSAGE_QUEUE_INIT_ARGUMENTS {
+ sharedMemPhysAddr: cmdq.dma_handle(),
+ pageTableEntryCount: Cmdq::NUM_PTES as u32,
+ cmdQueueOffset: Cmdq::CMDQ_OFFSET as u64,
+ statQueueOffset: Cmdq::STATQ_OFFSET as u64,
+ ..Default::default()
+ })
+ }
+}
+
+#[repr(transparent)]
+pub(crate) struct GspSrInitArguments(bindings::GSP_SR_INIT_ARGUMENTS);
+
+impl GspSrInitArguments {
+ pub(crate) fn new() -> Self {
+ Self(bindings::GSP_SR_INIT_ARGUMENTS {
+ oldLevel: 0,
+ flags: 0,
+ bInPMTransition: 0,
+ ..Default::default()
+ })
+ }
+}
diff --git a/drivers/gpu/nova-core/gsp/fw/r570_144/bindings.rs b/drivers/gpu/nova-core/gsp/fw/r570_144/bindings.rs
index 3d96d91e5b12..b87c4e6cb857 100644
--- a/drivers/gpu/nova-core/gsp/fw/r570_144/bindings.rs
+++ b/drivers/gpu/nova-core/gsp/fw/r570_144/bindings.rs
@@ -319,6 +319,39 @@ fn fmt(&self, fmt: &mut ::core::fmt::Formatter<'_>) -> ::core::fmt::Result {
pub const NV_VGPU_MSG_EVENT_NUM_EVENTS: _bindgen_ty_3 = 4131;
pub type _bindgen_ty_3 = ffi::c_uint;
#[repr(C)]
+#[derive(Debug, Default, Copy, Clone)]
+pub struct MESSAGE_QUEUE_INIT_ARGUMENTS {
+ pub sharedMemPhysAddr: u64_,
+ pub pageTableEntryCount: u32_,
+ pub __bindgen_padding_0: [u8; 4usize],
+ pub cmdQueueOffset: u64_,
+ pub statQueueOffset: u64_,
+}
+#[repr(C)]
+#[derive(Debug, Default, Copy, Clone)]
+pub struct GSP_SR_INIT_ARGUMENTS {
+ pub oldLevel: u32_,
+ pub flags: u32_,
+ pub bInPMTransition: u8_,
+ pub __bindgen_padding_0: [u8; 3usize],
+}
+#[repr(C)]
+#[derive(Debug, Default, Copy, Clone)]
+pub struct GSP_ARGUMENTS_CACHED {
+ pub messageQueueInitArguments: MESSAGE_QUEUE_INIT_ARGUMENTS,
+ pub srInitArguments: GSP_SR_INIT_ARGUMENTS,
+ pub gpuInstance: u32_,
+ pub bDmemStack: u8_,
+ pub __bindgen_padding_0: [u8; 7usize],
+ pub profilerArgs: GSP_ARGUMENTS_CACHED__bindgen_ty_1,
+}
+#[repr(C)]
+#[derive(Debug, Default, Copy, Clone)]
+pub struct GSP_ARGUMENTS_CACHED__bindgen_ty_1 {
+ pub pa: u64_,
+ pub size: u64_,
+}
+#[repr(C)]
#[derive(Copy, Clone)]
pub union rpc_message_rpc_union_field_v03_00 {
pub spare: u32_,
--
2.50.1
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