| From: |
| Aniruddha Rao <anrao-AT-nvidia.com> |
| To: |
| <thierry.reding-AT-kernel.org>, <jonathanh-AT-nvidia.com> |
| Subject: |
| [PATCH 0/6] firmware: tegra: bpmp: Add Tegra410 ACPI MBWT support |
| Date: |
| Mon, 15 Jun 2026 08:37:25 +0000 |
| Message-ID: |
| <20260615083731.888055-1-anrao@nvidia.com> |
| Cc: |
| <linux-tegra-AT-vger.kernel.org>, <linux-kernel-AT-vger.kernel.org>, "Aniruddha Rao" <anrao-AT-nvidia.com> |
| Archive-link: |
| Article |
Tegra410, an ACPI-based platform, provides Memory Bandwidth Throttler
(MBWT) controls for PCIe and GPU connected over chip-to-chip link
(Nv-Clink) traffic on the path to DRAM. These controls are accessible
through BPMP firmware.
The current Tegra BPMP driver depends on Device Tree based transport
setup and does not support ACPI-based platforms. This series keeps the
existing DT path unchanged, adds ACPI support to the BPMP driver,
defines the MBWT BPMP ABI, adds Tegra410 MBWT helper functions, and
exposes a narrow sysfs interface for ACPI-based Tegra410 systems when
firmware reports support for the required MBWT requests.
Aniruddha Rao (6):
soc/tegra: Add Tegra410 SoC Kconfig symbol
firmware: tegra: bpmp: Move channel, resource init to helper
firmware: tegra: bpmp: Add ACPI support
firmware: tegra: bpmp: Add the Memory Bandwidth Throttler ABI
definitions
firmware: tegra: bpmp: Add Tegra410 MBWT BPMP helpers
firmware: tegra: bpmp: Add Tegra410 MBWT sysfs interface
.../ABI/testing/sys-platform-tegra-bpmp | 51 ++++
drivers/firmware/tegra/Makefile | 2 +
drivers/firmware/tegra/bpmp-private.h | 42 +++
drivers/firmware/tegra/bpmp-tegra-sysfs.c | 210 ++++++++++++++
drivers/firmware/tegra/bpmp-tegra410.c | 108 +++++++
drivers/firmware/tegra/bpmp.c | 272 ++++++++++++++----
drivers/soc/tegra/Kconfig | 10 +
include/soc/tegra/bpmp-abi.h | 161 ++++++++++-
8 files changed, 807 insertions(+), 49 deletions(-)
create mode 100644 Documentation/ABI/testing/sys-platform-tegra-bpmp
create mode 100644 drivers/firmware/tegra/bpmp-tegra-sysfs.c
create mode 100644 drivers/firmware/tegra/bpmp-tegra410.c
--
2.43.0
