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Mon, 14 Sep 2026 00:51:18 -0700 From: Zhi Wang To: , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Zhi Wang Subject: [PATCH v2 15/32] gpu: nova-core: gsp: add status-only GMC transactions Date: Mon, 14 Sep 2026 10:48:50 +0300 Message-ID: <20260914074907.1399629-16-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: BN2PEPF0000A893:EE_|DS7PR12MB8250:EE_ X-MS-Office365-Filtering-Correlation-Id: f5846086-ddcc-455b-7ca9-08df123506c8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|82310400026|1800799024|36860700016|23010399003|18002099003|22082099003|5023799004|56012099006|11063799006|10067099003; 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Add a helper that waits for the matching response with a zero payload limit and converts a nonzero firmware status to EIO. Co-developed-by: Alok Kumar Signed-off-by: Alok Kumar Signed-off-by: Zhi Wang --- drivers/gpu/nova-core/gsp/cmdq.rs | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/nova-core/gsp/cmdq.rs b/drivers/gpu/nova-core/gsp/cmdq.rs index 9fb17e576eb8..891dec5c108a 100644 --- a/drivers/gpu/nova-core/gsp/cmdq.rs +++ b/drivers/gpu/nova-core/gsp/cmdq.rs @@ -503,7 +503,6 @@ pub(crate) enum QueuePointers { /// Response from a GMC API command. pub(crate) struct GmcResponse { /// Response status (`NV_STATUS` code). Zero means success. - #[expect(dead_code)] pub(crate) status: u32, /// Response payload copied out of the message queue. #[expect(dead_code)] @@ -652,7 +651,6 @@ pub(crate) fn send_gmc_no_wait( /// /// The queue stays locked for the complete transaction. A single deadline bounds all queue /// elements observed while waiting. - #[expect(dead_code)] pub(crate) fn send_gmc_and_receive( &self, command_id: u32, @@ -736,6 +734,17 @@ pub(crate) fn send_gmc_and_receive_timeout( } } + /// Sends a synchronous GMC command and checks its status-only reply. + #[expect(dead_code)] + pub(crate) fn send_gmc_and_check_status(&self, command_id: u32, payload: &[u8]) -> Result { + let response = self.send_gmc_and_receive(command_id, payload, 0)?; + if response.status == 0 { + Ok(()) + } else { + Err(EIO) + } + } + /// Waits for an unsolicited GSP event of type `M`, consuming any other event that arrives /// first. ///