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Message-ID: <20240828222932.1279508-1-xi.pardee@linux.intel.com>
Date: Wed, 28 Aug 2024 15:29:15 -0700
From: Xi Pardee <xi.pardee@...ux.intel.com>
To: xi.pardee@...ux.intel.com,
irenic.rajneesh@...il.com,
david.e.box@...ux.intel.com,
hdegoede@...hat.com,
ilpo.jarvinen@...ux.intel.com,
platform-driver-x86@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-pm@...r.kernel.org
Subject: [PATCH v2 00/11] Create Intel PMC SSRAM Telemetry driver
This patch series removes the SSRAM support from Intel PMC Core driver
and creates a separate PCI driver for SSRAM device. The new Intel PMC
SSRAM driver provides the following functionalities:
1. Search and store the PMC information in a structure, including PWRMBASE
address and devid for each available PMC. Then Intel PMC Core driver
achieves the PMC information using the API provided by the new driver.
2. Search and register Intel Platform Monitoring Techology telemetry
regions so they would by available for read through sysfs and Intel PMT
API. Intel PMC Core driver can achieve Low Power Mode requirement
information from a telemetry region registered by the new driver.
The above functionalities was previously handled by Intel PMC Core
driver. Intel PMC Core driver returns -EPROBE_DEFER when trying to read
data from a telem region that is not available yet. This setup may
result in an infinite loop of .probe() calls as Intel PMC Core driver
creates child devices. Creating a separate PCI driver avoids the infinite
loop possibility.
Changes in v2:
- Rearrange and restructure patches completely based on feedback from v1
- Here are the patches:
Preparation for the new SSRAM Telemetry driver:
platform/x86:intel/pmc: Move PMC Core related functions
platform/x86:intel/pmc: Rename core_ssram to ssram_telemetry
platform/x86:intel/pmc: Move PMC devid to core.h
Minor bug fix:
platform/x86:intel/pmc: Convert index variables to be unsigned
platform/x86:intel/pmc: Remove unneeded h file inclusion
platform/x86:intel/pmc: Remove unneeded io operations
platform/x86:intel/pmc: Check return value of ioremap
Create new driver and convert PMC Core to use the API:
platform/x86:intel/pmc: Create Intel PMC SSRAM Telemetry driver
Enable Lunar Lake platform:
platform/x86:intel/pmc: Add Lunar Lake SSRAM devid
platform/x86:intel/pmt: Get PMC from SSRAM for Lunar Lake
platform/x86:intel/pmc: Get LPM information for Lunar Lake
Xi Pardee (11):
platform/x86:intel/pmc: Move PMC Core related functions
platform/x86:intel/pmc: Rename core_ssram to ssram_telemetry
platform/x86:intel/pmc: Move PMC devid to core.h
platform/x86:intel/pmc: Convert index variables to be unsigned
platform/x86:intel/pmc: Remove unneeded h file inclusion
platform/x86:intel/pmc: Remove unneeded io operations
platform/x86:intel/pmc: Check return value of ioremap
platform/x86:intel/pmc: Create Intel PMC SSRAM Telemetry driver
platform/x86:intel/pmc: Add Lunar Lake SSRAM devid
platform/x86:intel/pmt: Get PMC from SSRAM for Lunar Lake
platform/x86:intel/pmc: Get LPM information for Lunar Lake
drivers/platform/x86/intel/pmc/Kconfig | 11 +
drivers/platform/x86/intel/pmc/Makefile | 8 +-
drivers/platform/x86/intel/pmc/arl.c | 24 +-
drivers/platform/x86/intel/pmc/core.c | 200 +++++++++++
drivers/platform/x86/intel/pmc/core.h | 23 +-
drivers/platform/x86/intel/pmc/core_ssram.c | 326 ------------------
drivers/platform/x86/intel/pmc/lnl.c | 41 ++-
drivers/platform/x86/intel/pmc/mtl.c | 24 +-
.../platform/x86/intel/pmc/ssram_telemetry.c | 183 ++++++++++
.../platform/x86/intel/pmc/ssram_telemetry.h | 45 +++
10 files changed, 525 insertions(+), 360 deletions(-)
delete mode 100644 drivers/platform/x86/intel/pmc/core_ssram.c
create mode 100644 drivers/platform/x86/intel/pmc/ssram_telemetry.c
create mode 100644 drivers/platform/x86/intel/pmc/ssram_telemetry.h
--
2.43.0
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