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Mon, 15 Jun 2026 01:37:52 -0700 From: Aniruddha Rao To: , CC: , , "Aniruddha Rao" Subject: [PATCH 5/6] firmware: tegra: bpmp: Add Tegra410 MBWT BPMP helpers Date: Mon, 15 Jun 2026 08:37:30 +0000 Message-ID: <20260615083731.888055-6-anrao@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260615083731.888055-1-anrao@nvidia.com> References: <20260615083731.888055-1-anrao@nvidia.com> Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: rnnvmail203.nvidia.com (10.129.68.9) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF00001504:EE_|SA1PR12MB8697:EE_ X-MS-Office365-Filtering-Correlation-Id: cf7ef4a7-9332-44f9-cea3-08decab96c72 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|376014|36860700016|23010399003|22082099003|18002099003|6133799003|56012099006|11063799006; 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The helpers implement the GET_BW and SET_BW operations and provide a QUERY_ABI-based probe for command availability. Signed-off-by: Aniruddha Rao --- drivers/firmware/tegra/Makefile | 1 + drivers/firmware/tegra/bpmp-private.h | 31 +++++++ drivers/firmware/tegra/bpmp-tegra410.c | 108 +++++++++++++++++++++++++ 3 files changed, 140 insertions(+) create mode 100644 drivers/firmware/tegra/bpmp-tegra410.c diff --git a/drivers/firmware/tegra/Makefile b/drivers/firmware/tegra/Makefile index 41e2e4dc31d6..4310cc0ff294 100644 --- a/drivers/firmware/tegra/Makefile +++ b/drivers/firmware/tegra/Makefile @@ -4,6 +4,7 @@ tegra-bpmp-$(CONFIG_ARCH_TEGRA_210_SOC) += bpmp-tegra210.o tegra-bpmp-$(CONFIG_ARCH_TEGRA_186_SOC) += bpmp-tegra186.o tegra-bpmp-$(CONFIG_ARCH_TEGRA_194_SOC) += bpmp-tegra186.o tegra-bpmp-$(CONFIG_ARCH_TEGRA_234_SOC) += bpmp-tegra186.o +tegra-bpmp-$(CONFIG_ARCH_TEGRA_410_SOC) += bpmp-tegra410.o tegra-bpmp-$(CONFIG_ARCH_TEGRA_264_SOC) += bpmp-tegra186.o tegra-bpmp-$(CONFIG_DEBUG_FS) += bpmp-debugfs.o obj-$(CONFIG_TEGRA_BPMP) += tegra-bpmp.o diff --git a/drivers/firmware/tegra/bpmp-private.h b/drivers/firmware/tegra/bpmp-private.h index ebde0e36ae20..c3f466ae5979 100644 --- a/drivers/firmware/tegra/bpmp-private.h +++ b/drivers/firmware/tegra/bpmp-private.h @@ -35,4 +35,35 @@ struct tegra_bpmp_acpi_message { u8 data[TEGRA_BPMP_ACPI_BMRQ_DATA_SZ]; }; +#if IS_ENABLED(CONFIG_ARCH_TEGRA_410_SOC) +int tegra410_bpmp_mbwt_set(struct tegra_bpmp *bpmp, unsigned int instance, + unsigned int vc_type, unsigned int bandwidth); +int tegra410_bpmp_mbwt_get(struct tegra_bpmp *bpmp, unsigned int instance, + unsigned int vc_type, unsigned int *bandwidth_out); +bool tegra410_bpmp_mbwt_cmd_is_supported(struct tegra_bpmp *bpmp, + unsigned int cmd_code); +#else +static inline int tegra410_bpmp_mbwt_set(struct tegra_bpmp *bpmp, + unsigned int instance, + unsigned int vc_type, + unsigned int bandwidth) +{ + return -EOPNOTSUPP; +} + +static inline int tegra410_bpmp_mbwt_get(struct tegra_bpmp *bpmp, + unsigned int instance, + unsigned int vc_type, + unsigned int *bandwidth_out) +{ + return -EOPNOTSUPP; +} + +static inline bool tegra410_bpmp_mbwt_cmd_is_supported(struct tegra_bpmp *bpmp, + unsigned int cmd_code) +{ + return false; +} +#endif + #endif diff --git a/drivers/firmware/tegra/bpmp-tegra410.c b/drivers/firmware/tegra/bpmp-tegra410.c new file mode 100644 index 000000000000..87c5dfab864b --- /dev/null +++ b/drivers/firmware/tegra/bpmp-tegra410.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2026, NVIDIA CORPORATION. + */ + +#include +#include +#include + +#include +#include + +#include "bpmp-private.h" + +bool tegra410_bpmp_mbwt_cmd_is_supported(struct tegra_bpmp *bpmp, + unsigned int cmd_code) +{ + struct mrq_sochub_mbwt_request request; + struct tegra_bpmp_message msg; + int err; + + memset(&request, 0, sizeof(request)); + request.cmd = CMD_SOCHUB_MBWT_QUERY_ABI; + request.query_abi.cmd_code = cmd_code; + + memset(&msg, 0, sizeof(msg)); + msg.mrq = MRQ_SOCHUB_MBWT; + msg.tx.data = &request; + msg.tx.size = sizeof(request); + + err = tegra_bpmp_transfer(bpmp, &msg); + if (err || msg.rx.ret) + return false; + + return true; +} + +int tegra410_bpmp_mbwt_set(struct tegra_bpmp *bpmp, + unsigned int instance, + unsigned int vc_type, + unsigned int bandwidth) +{ + struct mrq_sochub_mbwt_request request; + struct tegra_bpmp_message msg; + int err; + + memset(&request, 0, sizeof(request)); + request.cmd = CMD_SOCHUB_MBWT_SET_BW; + request.set_bw.instance = instance; + request.set_bw.vc_type = vc_type; + request.set_bw.bw = bandwidth; + + memset(&msg, 0, sizeof(msg)); + msg.mrq = MRQ_SOCHUB_MBWT; + msg.tx.data = &request; + msg.tx.size = sizeof(request); + + err = tegra_bpmp_transfer(bpmp, &msg); + + if (err) { + dev_err(bpmp->dev, "MBWT set bandwidth transfer failed: %d\n", err); + return err; + } + if (msg.rx.ret < 0) + return msg.rx.ret; + + return 0; +} + +int tegra410_bpmp_mbwt_get(struct tegra_bpmp *bpmp, + unsigned int instance, + unsigned int vc_type, + unsigned int *bandwidth_out) +{ + struct mrq_sochub_mbwt_request request; + struct mrq_sochub_mbwt_response response; + struct tegra_bpmp_message msg; + int err; + + if (!bandwidth_out) + return -EINVAL; + + memset(&request, 0, sizeof(request)); + request.cmd = CMD_SOCHUB_MBWT_GET_BW; + request.get_bw.instance = instance; + request.get_bw.vc_type = vc_type; + + memset(&response, 0, sizeof(response)); + + memset(&msg, 0, sizeof(msg)); + msg.mrq = MRQ_SOCHUB_MBWT; + msg.tx.data = &request; + msg.tx.size = sizeof(request); + msg.rx.data = &response; + msg.rx.size = sizeof(response); + + err = tegra_bpmp_transfer(bpmp, &msg); + if (err) { + dev_err(bpmp->dev, "MBWT get bandwidth transfer failed: %d\n", err); + return err; + } + if (msg.rx.ret < 0) + return msg.rx.ret; + + *bandwidth_out = response.get_bw.bw; + + return 0; +} -- 2.43.0