Add rpmi_event_notification_state enum with disable, enable, and return
current state IDs. Also, add req_state field to rpmi_enable_notification_req
and current_state field to rpmi_enable_notification_resp for RPMI specification
compliance.
Add notification event ID enum and data structures for RPMI Performance
service group events: power change, limit change, and level change.
Signed-off-by: David E. Garcia Porras <david.garcia@aheadcomputing.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260608125257.3220114-4-anup.patel@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
Add bit-field defines for the RPMI performance domain attributes flags
and fast-channel attributes flags as specified in the RPMI specification.
These are needed by platform implementations that provide RPMI
performance services (e.g. DVFS controllers).
Also add the missing db_write_value field to
rpmi_perf_get_fast_chn_attr_resp to match the RPMI spec layout.
Signed-off-by: David E. Garcia Porras <david.garcia@aheadcomputing.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260328054347.3706029-5-david.garcia@aheadcomputing.com
Signed-off-by: Anup Patel <anup@brainfault.org>
The P2A doorbell system MSI index is expected to be discovered from
device tree instead of RPMI system MSI service group attribute. This
is based on ARC feedback before RPMI spec was frozen.
Let's parse P2A doorbell system MSI index from device tree and also
expose it as rpmi channel attribute to RPMI client drivers.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20250512083827.804151-3-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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>
The service group ID assignment and some of the BASE services have
changes in the latest RPMI specification so let's update the RPMI
implementation accordingly.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
To allow clients query service group version of a RPMI mailbox channel,
implement get_attribute() callback for the RPMI shared memory mailbox
controller.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
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>
The RPMI HSM service group provides set of routine to query and control
power states of a Hart. Add RPMI based Hart State Management (HSM) driver.
Signed-off-by: Subrahmanya Lingappa <slingappa@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Add RPMI based system suspend driver.
To test this, execute the follwoing in Linux:
$ echo mem > /sys/power/state
To wake up, execute the following command on qemu monitor terminal:
(qemu) system_wakeup
Signed-off-by: Subrahmanya Lingappa <slingappa@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Add RPMI based driver for system reset and enable it in the generic
platform defconfig
Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
The RISC-V Platform Management Interface (RPMI) defines a messaging protocol
and shared memory based transport for bi-directional communication with an
on-chip or external microcontroller.
To support RPMI in OpenSBI, add:
1) The RPMI messaging protocol defines and helper macros
2) A FDT mailbox driver for the RPMI shared memory transport
Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com>
Co-developed-by: Subrahmanya Lingappa <slingappa@ventanamicro.com>
Signed-off-by: Subrahmanya Lingappa <slingappa@ventanamicro.com>
Co-developed-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
David E. Garcia Porras