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Mon, 14 Sep 2026 00:49:54 -0700 From: Zhi Wang To: , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Zhi Wang Subject: [PATCH v2 05/32] gpu: nova-core: gsp: expose the VMMU segment size Date: Mon, 14 Sep 2026 10:48:40 +0300 Message-ID: <20260914074907.1399629-6-zhiw@nvidia.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260914074907.1399629-1-zhiw@nvidia.com> References: <20260914074907.1399629-1-zhiw@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF0000A892:EE_|CHBPR12MB463627:EE_ X-MS-Office365-Filtering-Correlation-Id: 14e7a302-245d-4c71-5444-08df1234d0c2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|1800799024|82310400026|36860700016|7416014|376014|11063799006|56012099006|3023799007|10067099003|22082099003|18002099003; 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Add a getter for the existing decoded value and propagate it into GetGspStaticInfoReply. Keep zero when firmware omits the optional key. Cc: Alexandre Courbot Signed-off-by: Zhi Wang --- drivers/gpu/nova-core/gsp/commands.rs | 4 ++++ drivers/gpu/nova-core/gsp/fw/commands.rs | 5 +++++ 2 files changed, 9 insertions(+) diff --git a/drivers/gpu/nova-core/gsp/commands.rs b/drivers/gpu/nova-core/gsp/commands.rs index 09223bc3b793..afc32c2a230e 100644 --- a/drivers/gpu/nova-core/gsp/commands.rs +++ b/drivers/gpu/nova-core/gsp/commands.rs @@ -53,6 +53,9 @@ pub(crate) struct GetGspStaticInfoReply { pub(crate) usable_fb_regions: KVec>, /// Exclusive end of the FB physical address space. pub(crate) total_fb_end: u64, + /// VMMU segment size in bytes, or zero if GSP-RM omitted it. + #[expect(dead_code)] + pub(crate) vmmu_segment_size: u64, } /// Error type for [`GetGspStaticInfoReply::gpu_name`]. @@ -276,6 +279,7 @@ fn decode_gsp_info(words: &[u64]) -> Result { bar1_pde_base: decoded.bar1_pde_base(), usable_fb_regions, total_fb_end: decoded.total_fb_end().ok_or(EINVAL)?, + vmmu_segment_size: decoded.vmmu_segment_size(), }) } diff --git a/drivers/gpu/nova-core/gsp/fw/commands.rs b/drivers/gpu/nova-core/gsp/fw/commands.rs index 2b9f8edb039d..c2e199688b79 100644 --- a/drivers/gpu/nova-core/gsp/fw/commands.rs +++ b/drivers/gpu/nova-core/gsp/fw/commands.rs @@ -367,6 +367,11 @@ pub(crate) fn total_fb_end(&self) -> Option { .max()? .checked_add(1) } + + /// Returns the VMMU segment size in bytes, or zero if GSP-RM omitted it. + pub(in crate::gsp) const fn vmmu_segment_size(&self) -> u64 { + self.vmmu_segment_size + } } nvkv_decode! {