linux-kernel - [PATCH 3/6] gpu: nova-core: Blackwell: basic GPU identification

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Message-ID: <20251106035435.619949-4-jhubbard@nvidia.com>
Date: Wed,  5 Nov 2025 19:54:32 -0800
From: John Hubbard <jhubbard@...dia.com>
To: Danilo Krummrich <dakr@...nel.org>
Cc: Alexandre Courbot <acourbot@...dia.com>,
	Joel Fernandes <joelagnelf@...dia.com>,
	Timur Tabi <ttabi@...dia.com>,
	Alistair Popple <apopple@...dia.com>,
	Edwin Peer <epeer@...dia.com>,
	Zhi Wang <zhiw@...dia.com>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Bjorn Helgaas <bhelgaas@...gle.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>,
	nouveau@...ts.freedesktop.org,
	rust-for-linux@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	John Hubbard <jhubbard@...dia.com>
Subject: [PATCH 3/6] gpu: nova-core: Blackwell: basic GPU identification

Blackwell GPU identification, including ELF .fwsignature_* items.

Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 drivers/gpu/nova-core/falcon/hal.rs   |  3 ++-
 drivers/gpu/nova-core/fb/hal.rs       |  5 ++---
 drivers/gpu/nova-core/firmware/gsp.rs | 16 ++++++++++++++++
 drivers/gpu/nova-core/gpu.rs          | 17 +++++++++++++++++
 4 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/nova-core/falcon/hal.rs b/drivers/gpu/nova-core/falcon/hal.rs
index 2e1fcd7ac813..7ba8ba856c72 100644
--- a/drivers/gpu/nova-core/falcon/hal.rs
+++ b/drivers/gpu/nova-core/falcon/hal.rs
@@ -44,7 +44,8 @@ pub(super) fn falcon_hal<E: FalconEngine + 'static>(
     use Chipset::*;
 
     let hal = match chipset {
-        GA102 | GA103 | GA104 | GA106 | GA107 | GH100 | AD102 | AD103 | AD104 | AD106 | AD107 => {
+        GA102 | GA103 | GA104 | GA106 | GA107 | GH100 | AD102 | AD103 | AD104 | AD106 | AD107
+        | GB100 | GB102 | GB202 | GB203 | GB205 | GB206 | GB207 => {
             KBox::new(ga102::Ga102::<E>::new(), GFP_KERNEL)? as KBox<dyn FalconHal<E>>
         }
         _ => return Err(ENOTSUPP),
diff --git a/drivers/gpu/nova-core/fb/hal.rs b/drivers/gpu/nova-core/fb/hal.rs
index c8e86193317d..30fde2487d8b 100644
--- a/drivers/gpu/nova-core/fb/hal.rs
+++ b/drivers/gpu/nova-core/fb/hal.rs
@@ -32,8 +32,7 @@ pub(super) fn fb_hal(chipset: Chipset) -> &'static dyn FbHal {
     match chipset {
         TU102 | TU104 | TU106 | TU117 | TU116 => tu102::TU102_HAL,
         GA100 => ga100::GA100_HAL,
-        GA102 | GA103 | GA104 | GA106 | GA107 | GH100 | AD102 | AD103 | AD104 | AD106 | AD107 => {
-            ga102::GA102_HAL
-        }
+        GA102 | GA103 | GA104 | GA106 | GA107 | GH100 | AD102 | AD103 | AD104 | AD106 | AD107
+        | GB100 | GB102 | GB202 | GB203 | GB205 | GB206 | GB207 => ga102::GA102_HAL,
     }
 }
diff --git a/drivers/gpu/nova-core/firmware/gsp.rs b/drivers/gpu/nova-core/firmware/gsp.rs
index f824863ad551..ed2dea2cd144 100644
--- a/drivers/gpu/nova-core/firmware/gsp.rs
+++ b/drivers/gpu/nova-core/firmware/gsp.rs
@@ -153,6 +153,22 @@ pub(crate) fn new<'a, 'b>(
             Architecture::Ampere => ".fwsignature_ga10x",
             Architecture::Hopper => ".fwsignature_gh10x",
             Architecture::Ada => ".fwsignature_ad10x",
+            Architecture::Blackwell => {
+                // Distinguish between GB10x and GB20x series
+                match chipset {
+                    // GB10x series: GB100, GB102
+                    Chipset::GB100 | Chipset::GB102 => ".fwsignature_gb10x",
+                    // GB20x series: GB202, GB203, GB205, GB206, GB207
+                    Chipset::GB202
+                    | Chipset::GB203
+                    | Chipset::GB205
+                    | Chipset::GB206
+                    | Chipset::GB207 => ".fwsignature_gb20x",
+                    // Unsupported Blackwell chips
+                    _ => return Err(ENOTSUPP),
+                }
+            }
+
             _ => return Err(ENOTSUPP),
         };
         let signatures = elf::elf64_section(fw.data(), sigs_section)
diff --git a/drivers/gpu/nova-core/gpu.rs b/drivers/gpu/nova-core/gpu.rs
index 678577cd8c9c..024bd4d6e092 100644
--- a/drivers/gpu/nova-core/gpu.rs
+++ b/drivers/gpu/nova-core/gpu.rs
@@ -78,6 +78,14 @@ fn try_from(value: u32) -> Result<Self, Self::Error> {
     AD104 = 0x194,
     AD106 = 0x196,
     AD107 = 0x197,
+    // Blackwell
+    GB100 = 0x1a0,
+    GB102 = 0x1a2,
+    GB202 = 0x1b2,
+    GB203 = 0x1b3,
+    GB205 = 0x1b5,
+    GB206 = 0x1b6,
+    GB207 = 0x1b7,
 });
 
 impl Chipset {
@@ -93,6 +101,13 @@ pub(crate) fn arch(&self) -> Architecture {
             Self::AD102 | Self::AD103 | Self::AD104 | Self::AD106 | Self::AD107 => {
                 Architecture::Ada
             }
+            Self::GB100
+            | Self::GB102
+            | Self::GB202
+            | Self::GB203
+            | Self::GB205
+            | Self::GB206
+            | Self::GB207 => Architecture::Blackwell,
         }
     }
 }
@@ -120,6 +135,7 @@ pub(crate) enum Architecture {
     Ampere = 0x17,
     Hopper = 0x18,
     Ada = 0x19,
+    Blackwell = 0x1b,
 }
 
 impl TryFrom<u8> for Architecture {
@@ -131,6 +147,7 @@ fn try_from(value: u8) -> Result<Self> {
             0x17 => Ok(Self::Ampere),
             0x18 => Ok(Self::Hopper),
             0x19 => Ok(Self::Ada),
+            0x1b => Ok(Self::Blackwell),
             _ => Err(ENODEV),
         }
     }
-- 
2.51.2