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Intel CoffeeLake SoC uses CPU ID of KabyLake but has Cannonlake PCH, so in
this case PMC register details from Cannonlake PCH must be used.
In order to identify whether the given platform is Coffeelake, scan for the
Sunrisepoint PMC PCI Id.
KBL CPUID SPT PCIID
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KBL | Y | Y |
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CFL | Y | N |
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Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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This adds support for Cannonlake PCH which is used by Cannonlake and
Coffeelake SoCs.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Read SLP_S0 address from ACPI LPIT table when present and use PMC
specific SLP_S0 offset to get the base address of PMC MMIO.
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Recently sent patch 'platform/x86: intel_pmc_core: Remove unused EXPORTED
API' missed to remove the header file 'arch/x86/include/asm/pmc_core.h'
which was solely used to declare the EXPORTED API
'intel_pmc_slp_s0_counter_read'. This patch provides the errata fix for the
same.
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Use ICPU macro to refactor code related to x86_cpu_id for better
readability.
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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The Only use of PCI device enumeration here is to get the PMC base address
which is a fixed value i.e. 0xFE000000. On some platforms this can be read
through a non standard PCI BAR. But after Kabylake, PMC is not exposed as a
PCI device anymore. There are other non standard methods like ACPI LPIT
which can also be used for obtaining this value.
For simplicity, this value can be hardcoded as it won't change.
Since we don't have a PMC PCI device on any platform after Kabylake, this
creates a foundation for future SoC support.
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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When on a platform if we can't show MPHY and PLL status, don't even bother
to create a debugfs entry as it will fail anyway. In fact unless OEM builds
a special BIOS for test, it will fail on every production system.
This will help to add future platform support where we can't support these
entries.
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Symbolic permissions 'S_IRUGO' are not preferred. This patch changes the
debugfs files to use octal permissions '0644' or '0444' as needed by the
attribute.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Allow the driver to be a module since builtin_pci_driver funtionality is no
longer needed.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Though ChromeOs uses the exported API as part of their S0ix failsafe
mechanism, there is no active consumer of this API in upstream kernel.
We can revisit this when ChromeOs kernel team is able to get their S0ix
failsafe framework in mainline.
Cc: Derek Basehore <dbasehore@chromium.org>
Cc: Rajat Jain <rajatja@google.com>
Link: https://patchwork.kernel.org/patch/9831229/
Suggested-by: Andriy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Although this driver did pretty good job in abstracting PCH specific
interfaces, but still there are some loose ends. For example
SLP_S0 counter (for reading SLP_S0 residency), PM config offset (for
checking permissions to read XRAM) and PPFEAR offset (for reading IP
status) is still hardcoded for a specific family of PCH.
This change extended the struct pmc_reg_map to allow per family
configuration of offsets and bits.
No functional change is expected with this change. This change allows
seamless additions to new PCH and create a baseline for other platform
specific extensions.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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pmc_core_mtpmc_link_status() an pmc_core_check_read_lock_bit() use
test_bit() on local 32-bit variable. This causes out-of-bounds
access since test_bit() expects object at least of 'unsigned long' size:
BUG: KASAN: stack-out-of-bounds in pmc_core_probe+0x3aa/0x3b0
Call Trace:
__asan_report_load_n_noabort+0x5c/0x80
pmc_core_probe+0x3aa/0x3b0
local_pci_probe+0xf9/0x1e0
pci_device_probe+0x27b/0x350
driver_probe_device+0x419/0x830
__driver_attach+0x15f/0x1d0
bus_for_each_dev+0x129/0x1d0
driver_attach+0x42/0x70
bus_add_driver+0x385/0x690
driver_register+0x1a9/0x3d0
__pci_register_driver+0x1a2/0x290
intel_pmc_core_driver_init+0x19/0x1b
do_one_initcall+0x12e/0x280
kernel_init_freeable+0x57c/0x623
kernel_init+0x13/0x140
ret_from_fork+0x2e/0x40
Fix this by open coding bit test. While at it, also refactor this code
a little bit.
Fixes: 173943b3dae5 ("platform/x86: intel_pmc_core: ModPhy core lanes pg status")
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
[andy: reverted not related changes, used BIT() macro]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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This patch adds Kabylake CPU support for pmc_core driver.
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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SPT LTR_IGN register provides a means to make the PMC ignore the LTR values
reported by the individual PCH devices.
echo <IP Offset> > /sys/kernel/debug/pmc_core/ltr_ignore.
When a particular IP Offset bit is set the PMC will ignore the LTR value
reported by the corresponding IP when the PMC performs the latency
coalescing.
IP Offset IP Name
0 SPA
1 SPB
2 SATA
3 GBE
4 XHCI
5 RSVD
6 ME
7 EVA
8 SPC
9 Azalia/ADSP
10 RSVD
11 LPSS
12 SPD
13 SPE
14 Camera
15 ESPI
16 SCC
17 ISH
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
[dvhart: pmc_core_ltr_ignore_write local declaration order cleanup]
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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ModPhy Common lanes can provide the clock gating status for the important
system PLLs such as Gen2 USB3PCIE2 PLL, DMIPCIE3 PLL, SATA PLL and MIPI
PLL.
On SPT, in addition to the crystal oscillator clock, the 100Mhz Gen2
USB3PCI2 PLL clock is used as the PLL reference clock and Gen2 PLL idling
is a necessary condition for the platform to go into low power states like
PC10 and S0ix.
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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The PCH implements a number of High Speed I/O (HSIO) lanes that are split
between PCIe*, USB 3.0, SATA, GbE, USB OTG and SSIC. This patch shows the
current power gating status of the available ModPhy Core lanes. This is
done by sending a message to the PMC (MTPMC) that contains the XRAM
register offset for the MPHY_CORE_STS_0 and MPHY_CORE_STS_1 and then by
reading the response sent by the PMC (MFPMC).
While enabling low power modes we often encounter situations when the
ModPhy lanes are not power gated and it becomes hard to debug which lane is
active and which is not in the absence of an external hardware debugger
(JTAG/ITP). This patch eliminates the dependency on an external hardware
debugger for reading the ModPhy Lanes power gating status.
This patch requires PMC_READ_DISABLE setting to be disabled in the platform
bios.
cat /sys/kernel/debug/pmc_core/mphy_lanes_power_gating_status
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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This patch adds the support for reading the power gating status of various
devices present on Sunrise Point PCH. This is intended to be used for
debugging purpose while tuning the platform for power optimizations and
also to understand which devices (on PCH) are blocking the system to enter
a low power state.
Power Management Controller on Sunrise Point PCH provides access to "PGD
PFET Enable Ack Status Registers (ppfear)". This patch reads and decodes
this register and dumps the output in formatted manner showing various
devices present on the PCH and their "Power Gating" status.
Further documentation can be found in Intel 7th Gen Core family mobile u/y
processor io datasheet volume 2.
Sample output (stripped and not in order):
cat /sys/kernel/debug/pmc_core/pch_ip_power_gating_status
PMC State: Not Power gated
OPI-DMI State: Not Power gated
XHCI State: Power gated
LPSS State: Power gated
CSME_PSF State: Not power gated
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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On Sunrise Point PCH, the Power Management Controller provides 4K bytes of
memory space for various power management and debug registers. This fix is
needed to access power management & debug registers that are mapped at a
higher offset.
Also, this provides a fix for correctly masking the PWRMBASE as the initial
bits (0-11) are reserved.
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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While looking at a patch that introduced a compile-time warning
"‘pmc_core_dev_state_get’ defined but not used" (I sent a patch
for debugfs to fix it), I noticed that the same patch caused
it in intel_pmc_core also introduced a bogus run-time warning:
"PMC Core: debugfs register failed".
The problem is the IS_ERR_OR_NULL() check that as usual gets
things wrong: when CONFIG_DEBUGFS_FS is disabled,
debugfs_create_dir() fails with an error code, and we don't
need to warn about it, unlike the case in which it returns
NULL.
This reverts the driver to the previous state of not warning
about CONFIG_DEBUGFS_FS being disabled. I chose not to
restore the driver to making a runtime error in debugfs
fatal in pmc_core_probe().
Fixes: df2294fb6428 ("intel_pmc_core: Convert to DEFINE_DEBUGFS_ATTRIBUTE")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
Pull x8 platform driver updates from Darren Hart:
"Several new quirks and tweaks for new platforms to existing laptop
drivers. A new ACPI virtual power button driver, similar to the
intel-hid driver. A rework of the dell keymap, using a single sparse
keymap for all machines. A few fixes and cleanups.
Summary:
intel-vbtn:
- new driver for Intel Virtual Button
intel_pmc_core:
- Convert to DEFINE_DEBUGFS_ATTRIBUTE
fujitsu-laptop:
- Rework brightness of eco led
asus-wmi:
- Add quirk_no_rfkill_wapf4 for the Asus X456UA
- Add quirk_no_rfkill_wapf4 for the Asus X456UF
- Add quirk_no_rfkill for the Asus Z550MA
- Add quirk_no_rfkill for the Asus U303LB
- Add quirk_no_rfkill for the Asus N552VW
- Create quirk for airplane_mode LED
- Add ambient light sensor toggle key
asus-wireless:
- Toggle airplane mode LED
intel_telemetry:
- Remove Monitor MWAIT feature dependency
intel-hid:
- Remove duplicated acpi_remove_notify_handler
fujitsu-laptop:
- Add support for eco LED
- Support touchpad toggle hotkey on Skylake-based models
- Remove unused macros
- Use module name in debug messages
hp-wmi:
- Fix wifi cannot be hard-unblocked
toshiba_acpi:
- Bump driver version and update copyright year
- Remove the position sysfs entry
- Add IIO interface for accelerometer axis data
dell-wmi:
- Add a WMI event code for display on/off
- Generate one sparse keymap for all machines
- Add information about other WMI event codes
- Sort WMI event codes and update comments
- Ignore WMI event code 0xe045"
* tag 'platform-drivers-x86-v4.8-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86: (26 commits)
intel-vbtn: new driver for Intel Virtual Button
intel_pmc_core: Convert to DEFINE_DEBUGFS_ATTRIBUTE
fujitsu-laptop: Rework brightness of eco led
asus-wmi: Add quirk_no_rfkill_wapf4 for the Asus X456UA
asus-wmi: Add quirk_no_rfkill_wapf4 for the Asus X456UF
asus-wmi: Add quirk_no_rfkill for the Asus Z550MA
asus-wmi: Add quirk_no_rfkill for the Asus U303LB
asus-wmi: Add quirk_no_rfkill for the Asus N552VW
asus-wmi: Create quirk for airplane_mode LED
asus-wireless: Toggle airplane mode LED
intel_telemetry: Remove Monitor MWAIT feature dependency
intel-hid: Remove duplicated acpi_remove_notify_handler
asus-wmi: Add ambient light sensor toggle key
fujitsu-laptop: Add support for eco LED
fujitsu-laptop: Support touchpad toggle hotkey on Skylake-based models
fujitsu-laptop: Remove unused macros
fujitsu-laptop: Use module name in debug messages
hp-wmi: Fix wifi cannot be hard-unblocked
toshiba_acpi: Bump driver version and update copyright year
toshiba_acpi: Remove the position sysfs entry
...
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Refactor the code to use the recently introduced
DEFINE_DEBUGFS_ATTRIBUTE() macro to eliminate boilerplate code.
Make the absence of DEBUG_FS a non-fatal error.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-and-tested-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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Another straightforward replacement of magic numbers.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Darren Hart <dvhart@infradead.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vishwanath Somayaji <vishwanath.somayaji@intel.com>
Cc: jacob.jun.pan@intel.com
Cc: platform-driver-x86@vger.kernel.org
Link: http://lkml.kernel.org/r/20160603001949.7D5B9534@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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This patch adds the Power Management Controller driver as a PCI driver
for Intel Core SoC architecture.
This driver can utilize debugging capabilities and supported features
as exposed by the Power Management Controller.
Please refer to the below specification for more details on PMC features.
http://www.intel.in/content/www/in/en/chipsets/100-series-chipset-datasheet-vol-2.html
The current version of this driver exposes SLP_S0_RESIDENCY counter.
This counter can be used for detecting fragile SLP_S0 signal related
failures and take corrective actions when PCH SLP_S0 signal is not
asserted after kernel freeze as part of suspend to idle flow
(echo freeze > /sys/power/state).
Intel Platform Controller Hub (PCH) asserts SLP_S0 signal when it
detects favorable conditions to enter its low power mode. As a
pre-requisite the SoC should be in deepest possible Package C-State
and devices should be in low power mode. For example, on Skylake SoC
the deepest Package C-State is Package C10 or PC10. Suspend to idle
flow generally leads to PC10 state but PC10 state may not be sufficient
for realizing the platform wide power potential which SLP_S0 signal
assertion can provide.
SLP_S0 signal is often connected to the Embedded Controller (EC) and the
Power Management IC (PMIC) for other platform power management related
optimizations.
In general, SLP_S0 assertion == PC10 + PCH low power mode + ModPhy Lanes
power gated + PLL Idle.
As part of this driver, a mechanism to read the SLP_S0_RESIDENCY is exposed
as an API and also debugfs features are added to indicate SLP_S0 signal
assertion residency in microseconds.
echo freeze > /sys/power/state
wake the system
cat /sys/kernel/debug/pmc_core/slp_s0_residency_usec
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Vishwanath Somayaji <vishwanath.somayaji@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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