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2025-12-08lib: utils: Use SBI_DOMAIN_MMIO to check MMIO device permissionsHEADmasterSamuel Holland1-1/+2
Drivers or platforms may create memory regions with the MMIO flag set that contain S-mode-accessible MMIO devices. This is strictly correct and should be allowed, along with the existing default case of S-mode-accessible MMIO devices appearing in non-MMIO memory regions. When passed SBI_DOMAIN_MMIO, sbi_domain_check_addr() will perform the correct set of permission checks. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Yu-Chien Peter Lin <peter.lin@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20251121193808.1528050-3-samuel.holland@sifive.com Signed-off-by: Anup Patel <anup@brainfault.org>
2025-11-04lib: utils: Add MPXY RPMI mailbox driver for performanceJoshua Yeong3-0/+98
Add MPXY RPMI mailbox driver for performance. Signed-off-by: Joshua Yeong <joshua.yeong@starfivetech.com> Reviewed-by: Rahul Pathak <rpathak@ventanamicro.com> Link: https://lore.kernel.org/r/20251013153138.1574512-4-joshua.yeong@starfivetech.com Signed-off-by: Anup Patel <anup@brainfault.org>
2025-11-04lib: utils: Add MPXY RPMI mailbox driver for device powerJoshua Yeong3-0/+63
Add MPXY RPMI mailbox driver for device power. Signed-off-by: Joshua Yeong <joshua.yeong@starfivetech.com> Reviewed-by: Rahul Pathak <rpathak@ventanamicro.com> Link: https://lore.kernel.org/r/20251013153138.1574512-3-joshua.yeong@starfivetech.com Signed-off-by: Anup Patel <anup@brainfault.org>
2025-11-04lib: utils: Add MPXY RPMI mailbox driver for voltageJoshua Yeong3-0/+84
Add voltage service group for RPMI/MPXY support Signed-off-by: Joshua Yeong <joshua.yeong@starfivetech.com> Reviewed-by: Rahul Pathak <rpathak@ventanamicro.com> Link: https://lore.kernel.org/r/20251013153138.1574512-2-joshua.yeong@starfivetech.com Signed-off-by: Anup Patel <anup@brainfault.org>
2025-06-24lib: rpmi: Make RPMI drivers as non-experimentalRahul Pathak2-2/+0
As RPMI v1.0 specification is frozen, disable the experimental tag for such RPMI drivers. Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20250618053854.2577299-2-rpathak@ventanamicro.com Signed-off-by: Anup Patel <anup@brainfault.org>
2025-06-24lib: utils: Add Implementation ID and Version as RPMI MPXY attributesRahul Pathak1-0/+15
The latest frozen RPMI spec has added Implementation ID and Implementation Version as message protocol specific mpxy attributes. Add support for these. Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20250618053854.2577299-1-rpathak@ventanamicro.com Signed-off-by: Anup Patel <anup@brainfault.org>
2025-05-20lib: utils: Fix fdt_mpxy_init() not returning error codeAlvin Chang1-6/+2
It seems that current implementation doesn't fail on fdt_mpxy_init(), because platforms might not have any MPXY devices. In fact, if there are no MPXY devices, fdt_driver_init_all() will return SBI_OK. More importantly, if there is any MPXY device which fails the initialization, OpenSBI must check the error code and stop the booting. Thus, this commit adds the return value for fdt_mpxy_init(). Signed-off-by: Alvin Chang <alvinga@andestech.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20250430091007.3768180-1-alvinga@andestech.com Signed-off-by: Anup Patel <anup@brainfault.org>
2025-05-20lib: utils/mpxy: Remove p2a_db_index from RPMI system MSI attributesAnup Patel1-4/+9
The discovery of P2A doorbell system MSI index is now through RPMI shared memory DT node so remove p2a_db_index from RPMI system MSI attributes and access it as a mailbox channel attribute. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Link: https://lore.kernel.org/r/20250512083827.804151-5-apatel@ventanamicro.com Signed-off-by: Anup Patel <anup@brainfault.org>
2025-02-13lib: utils: Add MPXY RPMI mailbox driver for System MSI service groupAnup Patel3-0/+211
The supervisor software can directly receive most of the system MSIs except P2A doorbell and MSIs preferred to be handled in M-mode. Add MPXY RPMI mailbox client driver for the System MSI service group. Signed-off-by: Anup Patel <apatel@ventanamicro.com>
2025-02-13lib: utils: Populate MPXY channel attributes from RPMI channel attributesAnup Patel1-36/+65
Use the RPMI mailbox channel attributes to populate MPXY channel attributes instead of hard coding them. Signed-off-by: Anup Patel <apatel@ventanamicro.com>
2025-02-13lib: utils: Improve variable declarations in MPXY RPMI mailbox clientAnup Patel1-16/+13
The local variable declarations should be at the start of function and preferrably organized like a inverted pyramid. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
2025-02-13lib: utils: Drop notifications from MPXY RPMI mailbox clientAnup Patel2-13/+0
Currently, the common MPXY RPMI mailbox client does not support notifications so no need for dummy notifications support. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
2025-02-13lib: utils: Introduce optional MPXY RPMI service group operationsAnup Patel1-4/+20
Some of the RPMI service groups may need additional context and special handling when transferring messages via underlying mailbox channel so introduce optional MPXY RPMI service group operations for this purpose. Signed-off-by: Anup Patel <apatel@ventanamicro.com>
2025-02-13lib: utils: Constantify mpxy_rpmi_mbox_data in mpxy_rpmi_mboxAnup Patel2-8/+9
The mpxy_rpmi_mbox_data is provided by RPMI service group specific MPXY driver to the common MPXY RPMI mailbox client implementation so let's constantify mpxy_rpmi_mbox_data in mpxy_rpmi_mbox so that it is not accidently modified. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
2025-02-13lib: utils: Split the FDT MPXY RPMI mailbox client into two partsAnup Patel4-154/+119
Instead of having one common FDT MPXY RPMI mailbox client drivers for various RPMI service groups, split this driver into two parts: 1) Common MPXY RPMI mailbox client library 2) MPXY driver for RPMI clock service group The above split enables having a separate MPXY driver for each RPMI clock service group and #1 (above) will allow code sharing between various MPXY RPMI drivers. Signed-off-by: Anup Patel <apatel@ventanamicro.com>
2024-12-21lib: utils: Mark RPMI drivers as experimentalSamuel Holland1-0/+1
These drivers were merged on an experimental basis without the RPMI specification being frozen. As a result, they may not be compatible with the frozen version of the RPMI protocol. Additionally, their devicetree bindings have not been reviewed and are subject to change. Warn the user that these drivers make no compatibility guarantees, and that their behavior and devicetree bindings may change incompatibly in future versions of OpenSBI. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org>
2024-12-06lib: utils/mpxy: Add RPMI client driver for MPXYRahul Pathak3-0/+454
Add a generic RPMI mailbox client driver which provides a MPXY channel. Initially, this driver only supports RPMI clock service group but can be extended to support multiple RPMI service groups. Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com> Co-developed-by: Anup Patel <apatel@ventanamicro.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com>
2024-12-06lib: utils: Add simple FDT based MPXY driver frameworkAnup Patel4-0/+46
The generic platform can have multiple MPXY drivers so add a simple FDT based MPXY driver framework. Signed-off-by: Anup Patel <apatel@ventanamicro.com>
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