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Wed, 15 Apr 2026 21:06:02 +0000 Received: from DS0PR12MB6486.namprd12.prod.outlook.com ([fe80::88a9:f314:c95f:8b33]) by DS0PR12MB6486.namprd12.prod.outlook.com ([fe80::88a9:f314:c95f:8b33%4]) with mapi id 15.20.9818.017; Wed, 15 Apr 2026 21:06:02 +0000 From: Joel Fernandes To: linux-kernel@vger.kernel.org Cc: Miguel Ojeda , Boqun Feng , Gary Guo , Bjorn Roy Baron , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Dave Airlie , Daniel Almeida , Koen Koning , dri-devel@lists.freedesktop.org, rust-for-linux@vger.kernel.org, Nikola Djukic , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jonathan Corbet , Alex Deucher , Christian Koenig , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Huang Rui , Matthew Auld , Lucas De Marchi , Thomas Hellstrom , Helge Deller , Alex Gaynor , Boqun Feng , John Hubbard , Alistair Popple , Timur Tabi , Edwin Peer , Alexandre Courbot , Andrea Righi , Andy Ritger , Zhi Wang , Balbir Singh , Philipp Stanner , Elle Rhumsaa , alexeyi@nvidia.com, Eliot Courtney , joel@joelfernandes.org, linux-doc@vger.kernel.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-fbdev@vger.kernel.org, Joel Fernandes Subject: [PATCH v11 03/20] gpu: nova-core: gsp: Expose total physical VRAM end from FB region info Date: Wed, 15 Apr 2026 17:05:30 -0400 Message-Id: <20260415210548.3776595-3-joelagnelf@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260415210548.3776595-1-joelagnelf@nvidia.com> References: <20260415210548.3776595-1-joelagnelf@nvidia.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: CY5PR19CA0047.namprd19.prod.outlook.com (2603:10b6:930:1a::6) To DS0PR12MB6486.namprd12.prod.outlook.com (2603:10b6:8:c5::21) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR12MB6486:EE_|SA3PR12MB9177:EE_ X-MS-Office365-Filtering-Correlation-Id: 2922aaba-15f8-4e98-88ee-08de9b32cd1b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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This allows callers to know the full physical VRAM extent, not just the allocatable portion. Signed-off-by: Joel Fernandes --- drivers/gpu/nova-core/gsp/commands.rs | 6 ++++++ drivers/gpu/nova-core/gsp/fw/commands.rs | 7 +++++++ 2 files changed, 13 insertions(+) diff --git a/drivers/gpu/nova-core/gsp/commands.rs b/drivers/gpu/nova-core/gsp/commands.rs index d18abd8b5f04..e42a865fd4ac 100644 --- a/drivers/gpu/nova-core/gsp/commands.rs +++ b/drivers/gpu/nova-core/gsp/commands.rs @@ -196,6 +196,9 @@ pub(crate) struct GetGspStaticInfoReply { /// Usable FB (VRAM) region for driver memory allocation. #[expect(dead_code)] pub(crate) usable_fb_region: Range, + /// End of VRAM. + #[expect(dead_code)] + pub(crate) total_fb_end: u64, } impl MessageFromGsp for GetGspStaticInfoReply { @@ -207,9 +210,12 @@ fn read( msg: &Self::Message, _sbuffer: &mut SBufferIter>, ) -> Result { + let total_fb_end = msg.total_fb_end().ok_or(ENODEV)?; + Ok(GetGspStaticInfoReply { gpu_name: msg.gpu_name_str(), usable_fb_region: msg.first_usable_fb_region().ok_or(ENODEV)?, + total_fb_end, }) } } diff --git a/drivers/gpu/nova-core/gsp/fw/commands.rs b/drivers/gpu/nova-core/gsp/fw/commands.rs index 3d5180e6b1e0..f2d59aa3131f 100644 --- a/drivers/gpu/nova-core/gsp/fw/commands.rs +++ b/drivers/gpu/nova-core/gsp/fw/commands.rs @@ -164,6 +164,13 @@ pub(crate) fn first_usable_fb_region(&self) -> Option> { } }) } + + /// Compute the end of physical VRAM from all FB regions. + pub(crate) fn total_fb_end(&self) -> Option { + self.fb_regions() + .filter_map(|reg| reg.limit.checked_add(1)) + .max() + } } // SAFETY: Padding is explicit and will not contain uninitialized data. -- 2.34.1