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Add RPMI MPXY proxy driver for LOGGING service group so that
S-mode can leverage LOGGING service group implemented by the
platform microcontroller.
Reviewed-by: Rahul Pathak <[email protected]>
Signed-off-by: Subrahmanya Lingappa <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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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 <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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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 <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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Add necessary infra for implementing RPMI Management Mode
service group on platform microcontroller.
Co-authored-by: Sunil V L <[email protected]>
Signed-off-by: Ranbir Singh <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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Add MPXY RPMI mailbox driver for performance.
Signed-off-by: Joshua Yeong <[email protected]>
Reviewed-by: Rahul Pathak <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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Add MPXY RPMI mailbox driver for device power.
Signed-off-by: Joshua Yeong <[email protected]>
Reviewed-by: Rahul Pathak <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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Add voltage service group for RPMI/MPXY support
Signed-off-by: Joshua Yeong <[email protected]>
Reviewed-by: Rahul Pathak <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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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 <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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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 <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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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 <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
Reviewed-by: Samuel Holland <[email protected]>
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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 <[email protected]>
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The rpmi_mailbox.h uses structures defined in mailbox.h so let's
include mailbox.h in rpmi_mailbox.h header.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Samuel Holland <[email protected]>
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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 <[email protected]>
Co-developed-by: Anup Patel <[email protected]>
Signed-off-by: Anup Patel <[email protected]>
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Add RPMI based driver for CPPC register read, write and probe.
Signed-off-by: Subrahmanya Lingappa <[email protected]>
Co-developed-by: Rahul Pathak <[email protected]>
Signed-off-by: Rahul Pathak <[email protected]>
Co-developed-by: Sunil V L <[email protected]>
Signed-off-by: Sunil V L <[email protected]>
Signed-off-by: Anup Patel <[email protected]>
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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 <[email protected]>
Signed-off-by: Anup Patel <[email protected]>
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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 <[email protected]>
Signed-off-by: Anup Patel <[email protected]>
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Add RPMI based driver for system reset and enable it in the generic
platform defconfig
Signed-off-by: Rahul Pathak <[email protected]>
Signed-off-by: Anup Patel <[email protected]>
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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 <[email protected]>
Co-developed-by: Subrahmanya Lingappa <[email protected]>
Signed-off-by: Subrahmanya Lingappa <[email protected]>
Co-developed-by: Anup Patel <[email protected]>
Signed-off-by: Anup Patel <[email protected]>
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Add a simple FDT based mailbox framework which is built on top of the generic
mailbox library. The phandle of FDT mailbox DT node is treated as the unique
mailbox controller ID which is required by the generic mailbox library. The
FDT based mailbox drivers will be probed on-demand from fdt_mailbox_request_chan()
called by the mailbox client drivers.
Signed-off-by: Anup Patel <[email protected]>
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Add generic mailbox library which is independent of hardware description
format. The OpenSBI platform support or mailbox drivers can register
mailbox controller instances which can be discovered and used by different
mailbox client drivers. Each mailbox controller instance has a unique ID
which can be used by mailbox client drivers for find the mailbox controller
instance. The mailbox client drivers will typically request a mailbox channel
from the mailbox controller and use it to do data transfer with the remote
end of mailbox channel.
Signed-off-by: Anup Patel <[email protected]>
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