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a501e22c8e
162 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Keith Busch
|
3accf7ae37 |
acpi/hmat: Parse and report heterogeneous memory
Systems may provide different memory types and export this information in the ACPI Heterogeneous Memory Attribute Table (HMAT). Parse these tables provided by the platform and report the memory access and caching attributes to the kernel messages. Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Keith Busch <keith.busch@intel.com> Tested-by: Brice Goglin <Brice.Goglin@inria.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Sinan Kaya
|
1622745551 |
ACPI / LPSS: Make PCI dependency explicit
After commit |
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Sinan Kaya
|
5d32a66541 |
PCI/ACPI: Allow ACPI to be built without CONFIG_PCI set
We are compiling PCI code today for systems with ACPI and no PCI device present. Remove the useless code and reduce the tight dependency. Signed-off-by: Sinan Kaya <okaya@kernel.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com> # PCI parts Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Tony Luck
|
4cf841e398 |
ACPI/ADXL: Add address translation interface using an ACPI DSM
Some new Intel servers provide an interface so that the OS can ask the BIOS to translate a system physical address to a memory address (socket, memory controller, channel, rank, dimm, etc.). This is useful for EDAC drivers that want to take the address of an error reported in a machine check bank and let the user know which DIMM may need to be replaced. Specification for this interface is available at: https://cdrdv2.intel.com/v1/dl/getContent/603354 [ Based on earlier code by Qiuxu Zhuo <qiuxu.zhuo@intel.com>. ] [ bp: Make the first pr_info() in adxl_init() pr_debug() so that it doesn't pollute every dmesg. ] Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com> CC: Len Brown <lenb@kernel.org> CC: linux-acpi@vger.kernel.org CC: linux-edac@vger.kernel.org Link: http://lkml.kernel.org/r/20181015202620.23610-1-tony.luck@intel.com |
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Jeremy Linton
|
0ce8223223 |
ACPI: Enable PPTT support on ARM64
Now that we have a PPTT parser, in preparation for its use on arm64, lets build it. Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Vijaya Kumar K <vkilari@codeaurora.org> Tested-by: Xiongfeng Wang <wangxiongfeng2@huawei.com> Tested-by: Tomasz Nowicki <Tomasz.Nowicki@cavium.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
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Rafael J. Wysocki
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95c513ec84 |
ACPI: Add Time and Alarm Device (TAD) driver
Introduce a driver for the ACPI Time and Alarm Device (TAD) based on Section 9.18 of ACPI 6.2. This driver only supports the system wakeup capabilities of the TAD which are mandatory. Support for the RTC capabilities of the TAD will be added to it in the future. This driver is entirely sysfs-based. It provides attributes (under the TAD platform device) to allow user space to manage the AC and DC wakeup timers of the TAD: set and read their values, set and check their expire timer wake policies, check and clear their status and check the capabilities of the TAD reported by AML. The DC timer attributes are only present if the TAD supports a separate DC alarm timer. The wakeup events handling and power management of the TAD is expected to be taken care of by the ACPI PM domain attached to its platform device. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> |
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Linus Torvalds
|
d3092e4e99 |
- New Drivers
- Add support for Cherry Trail Dollar Cove TI PMIC
- Add support for Add Spreadtrum SC27xx series PMICs
- New Device Support
- Add support Regulator to axp20x
- New Functionality
- Add DT support; aspeed-scu sc27xx-pmic
- Add power saving support; rts5249
- Fix-ups
- DT clean-up/rework; tps65217, max77693, iproc-cdru, iproc-mhb, tps65218
- Staticise/constify; stw481x
- Use new succinct IRQ API; fsl-imx25-tsadc
- Kconfig fix-ups; MFD_TPS65218
- Identify SPI method; lpc_ich
- Use managed resources (devm_*) calls; ssbi
- Remove unused/obsolete code/documentation; mc13xxx
- Bug Fixes
- Fix typo in MAINTAINERS
- Fix error handling; mxs-lradc
- Clean-up IRQs on .remove; fsl-imx25-tsadc
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Merge tag 'mfd-next-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones:
"New drivers:
- Add support for Cherry Trail Dollar Cove TI PMIC
- Add support for Add Spreadtrum SC27xx series PMICs
New device support:
- Add support Regulator to axp20x
New functionality:
- Add DT support; aspeed-scu sc27xx-pmic
- Add power saving support; rts5249
Fix-ups:
- DT clean-up/rework; tps65217, max77693, iproc-cdru, iproc-mhb, tps65218
- Staticise/constify; stw481x
- Use new succinct IRQ API; fsl-imx25-tsadc
- Kconfig fix-ups; MFD_TPS65218
- Identify SPI method; lpc_ich
- Use managed resources (devm_*) calls; ssbi
- Remove unused/obsolete code/documentation; mc13xxx
Bug fixes:
- Fix typo in MAINTAINERS
- Fix error handling; mxs-lradc
- Clean-up IRQs on .remove; fsl-imx25-tsadc"
* tag 'mfd-next-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (21 commits)
dt-bindings: mfd: mc13xxx: Remove obsolete property
mfd: axp20x: Add axp20x-regulator cell for AXP813
mfd: Add Spreadtrum SC27xx series PMICs driver
dt-bindings: mfd: Add Spreadtrum SC27xx PMIC documentation
mfd: ssbi: Use devm_of_platform_populate()
mfd: fsl-imx25: Clean up irq settings during removal
mfd: mxs-lradc: Fix error handling in mxs_lradc_probe()
mfd: lpc_ich: Avoton/Rangeley uses SPI_BYT method
mfd: tps65218: Introduce dependency on CONFIG_OF
mfd: tps65218: Correct the config description
MAINTAINERS: Fix Dialog search term for watchdog binding file
mfd: fsl-imx25: Set irq handler and data in one go
mfd: rts5249: Add support for RTS5250S power saving
ACPI / PMIC: Add opregion driver for Intel Dollar Cove TI PMIC
mfd: Add support for Cherry Trail Dollar Cove TI PMIC
syscon: dt-bindings: Add binding document for iProc MHB block
syscon: dt-bindings: Add binding doc for Broadcom iProc CDRU
mfd: max77693: Add muic of_compatible in mfd_cell
mfd: stw481x: Make three arrays static const, reduces object code size
mfd: tps65217: Introduce dependency on CONFIG_OF
...
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Linus Torvalds
|
04ed510988 |
ACPI updates for v4.15-rc1
- Update the ACPICA code to upstream revision 20170831 including
* PDTT table header support (Bob Moore).
* Cleanup and extension of internal string-to-integer conversion
functions (Bob Moore).
* Support for 64-bit hardware accesses (Lv Zheng).
* ACPI PM Timer code adjustment to deal with 64-bit return values
of acpi_hw_read() (Bob Moore).
* Support for deferred table verification in acpiexec (Lv Zheng).
- Fix APEI to use the fixmap instead of ioremap_page_range() which
cannot work correctly the way the code in there attempted to use
it and drop some code that's not necessary any more after that
change (James Morse).
- Clean up the APEI support code and make it use 64-bit timestamps
(Arnd Bergmann, Dongjiu Geng, Jan Beulich).
- Add operation region driver for TI PMIC TPS68470 (Rajmohan Mani).
- Add support for PCC subspace IDs to the ACPI CPPC driver (George
Cherian).
- Fix an ACPI EC driver regression related to the handling of EC
events during the "noirq" phases of system suspend/resume (Lv
Zheng).
- Delay the initialization of the lid state in the ACPI button
driver to fix issues appearing on some systems (Hans de Goede).
- Extend the KIOX000A "device always present" quirk to cover all
affected BIOS versions (Hans de Goede).
- Clean up some code in the ACPI core and drivers (Colin Ian King,
Gustavo Silva).
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Merge tag 'acpi-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI updates from Rafael Wysocki:
"These update ACPICA to upstream revision 20170831, fix APEI to use the
fixmap instead of ioremap_page_range(), add an operation region driver
for TI PMIC TPS68470, add support for PCC subspace IDs to the ACPI
CPPC driver, fix a few assorted issues and clean up some code.
Specifics:
- Update the ACPICA code to upstream revision 20170831 including
* PDTT table header support (Bob Moore).
* Cleanup and extension of internal string-to-integer conversion
functions (Bob Moore).
* Support for 64-bit hardware accesses (Lv Zheng).
* ACPI PM Timer code adjustment to deal with 64-bit return values
of acpi_hw_read() (Bob Moore).
* Support for deferred table verification in acpiexec (Lv Zheng).
- Fix APEI to use the fixmap instead of ioremap_page_range() which
cannot work correctly the way the code in there attempted to use it
and drop some code that's not necessary any more after that change
(James Morse).
- Clean up the APEI support code and make it use 64-bit timestamps
(Arnd Bergmann, Dongjiu Geng, Jan Beulich).
- Add operation region driver for TI PMIC TPS68470 (Rajmohan Mani).
- Add support for PCC subspace IDs to the ACPI CPPC driver (George
Cherian).
- Fix an ACPI EC driver regression related to the handling of EC
events during the "noirq" phases of system suspend/resume (Lv
Zheng).
- Delay the initialization of the lid state in the ACPI button driver
to fix issues appearing on some systems (Hans de Goede).
- Extend the KIOX000A "device always present" quirk to cover all
affected BIOS versions (Hans de Goede).
- Clean up some code in the ACPI core and drivers (Colin Ian King,
Gustavo Silva)"
* tag 'acpi-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (24 commits)
ACPI: Mark expected switch fall-throughs
ACPI / LPSS: Remove redundant initialization of clk
ACPI / CPPC: Make CPPC ACPI driver aware of PCC subspace IDs
mailbox: PCC: Move the MAX_PCC_SUBSPACES definition to header file
ACPI / sysfs: Make function param_set_trace_method_name() static
ACPI / button: Delay acpi_lid_initialize_state() until first user space open
ACPI / EC: Fix regression related to triggering source of EC event handling
APEI / ERST: use 64-bit timestamps
ACPI / APEI: Remove arch_apei_flush_tlb_one()
arm64: mm: Remove arch_apei_flush_tlb_one()
ACPI / APEI: Remove ghes_ioremap_area
ACPI / APEI: Replace ioremap_page_range() with fixmap
ACPI / APEI: remove the unused dead-code for SEA/NMI notification type
ACPI / x86: Extend KIOX000A quirk to cover all affected BIOS versions
ACPI / APEI: adjust a local variable type in ghes_ioremap_pfn_irq()
ACPICA: Update version to 20170831
ACPICA: Update acpi_get_timer for 64-bit interface to acpi_hw_read
ACPICA: String conversions: Update to add new behaviors
ACPICA: String conversions: Cleanup/format comments. No functional changes
ACPICA: Restructure/cleanup all string-to-integer conversion functions
...
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Rafael J. Wysocki
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794c33555f |
Merge branch 'acpi-pm'
* acpi-pm: ACPI / PM: Fix acpi_pm_notifier_lock vs flush_workqueue() deadlock ACPI / LPSS: Consolidate runtime PM and system sleep handling ACPI / PM: Combine device suspend routines ACPI / LPIT: Add Low Power Idle Table (LPIT) support ACPI / PM: Split code validating need for runtime resume in ->prepare() ACPI / PM: Restore acpi_subsys_complete() ACPI / PM: Combine two identical device resume routines ACPI / PM: Remove stale function header |
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Rafael J. Wysocki
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85595ada6c |
Merge branches 'acpi-pmic', 'acpi-apei' and 'acpi-x86'
* acpi-pmic: ACPI / PMIC: Add TI PMIC TPS68470 operation region driver * acpi-apei: APEI / ERST: use 64-bit timestamps ACPI / APEI: Remove arch_apei_flush_tlb_one() arm64: mm: Remove arch_apei_flush_tlb_one() ACPI / APEI: Remove ghes_ioremap_area ACPI / APEI: Replace ioremap_page_range() with fixmap ACPI / APEI: remove the unused dead-code for SEA/NMI notification type ACPI / APEI: adjust a local variable type in ghes_ioremap_pfn_irq() * acpi-x86: ACPI / x86: Extend KIOX000A quirk to cover all affected BIOS versions |
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Greg Kroah-Hartman
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b24413180f |
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Takashi Iwai
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3137497232 |
ACPI / PMIC: Add opregion driver for Intel Dollar Cove TI PMIC
This patch adds the opregion driver for Dollar Cove TI PMIC on Intel
Cherry Trail devices. The patch is based on the original work by
Intel, found at:
https://github.com/01org/ProductionKernelQuilts
with many cleanups and rewrites.
The driver is currently provided only as built-in to follow other
PMIC opregion drivers convention.
The re-enumeration of devices at probe is required for fixing the
issues on HP x2 210 G2. See bug#195689.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=193891
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195689
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Srinivas Pandruvada
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eeb2d80d50 |
ACPI / LPIT: Add Low Power Idle Table (LPIT) support
Add functionality to read LPIT table, which provides: - Sysfs interface to read residency counters via /sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us /sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us Here the count "low_power_idle_cpu_residency_us" shows the time spent by CPU package in low power state. This is read via MSR interface, which points to MSR for PKG C10. Here the count "low_power_idle_system_residency_us" show the count the system was in low power state. This is read via MMIO interface. This is mapped to SLP_S0 residency on modern Intel systems. This residency is achieved only when CPU is in PKG C10 and all functional blocks are in low power state. It is possible that none of the above counters present or anyone of the counter present or all counters present. For example: On my Kabylake system both of the above counters present. After suspend to idle these counts updated and prints: 6916179 6998564 This counter can be read by tools like turbostat to display. Or it can be used to debug, if modern systems are reaching desired low power state. - Provides an interface to read residency counter memory address This address can be used to get the base address of PMC memory mapped IO. This is utilized by intel_pmc_core driver to print more debug information. In addition, to avoid code duplication to read iomem, removed the read of iomem from acpi_os_read_memory() in osl.c and made a common function acpi_os_read_iomem(). This new function is used for reading iomem in in both osl.c and acpi_lpit.c. Link: http://www.uefi.org/sites/default/files/resources/Intel_ACPI_Low_Power_S0_Idle.pdf Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Rajmohan Mani
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e13452ac37 |
ACPI / PMIC: Add TI PMIC TPS68470 operation region driver
The Kabylake platform coreboot (Chrome OS equivalent of BIOS) has defined 4 operation regions for the TI TPS68470 PMIC. These operation regions are to enable/disable voltage regulators, configure voltage regulators, enable/disable clocks and to configure clocks. This config adds ACPI operation region support for TI TPS68470 PMIC. TPS68470 device is an advanced power management unit that powers a Compact Camera Module (CCM), generates clocks for image sensors, drives a dual LED for flash and incorporates two LED drivers for general purpose indicators. This driver enables ACPI operation region support to control voltage regulators and clocks for the TPS68470 PMIC. Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Lukas Wunner
|
899596e090 |
ACPI / property: Support Apple _DSM properties
While the rest of the world has standardized on _DSD as the way to store
device properties in AML (introduced with ACPI 5.1 in 2014), Apple has
been using a custom _DSM to achieve the same for much longer (ever since
they switched from DeviceTree-based PowerPC to Intel in 2005, verified
with MacOS X 10.4.11).
The theory of operation on macOS is as follows: AppleACPIPlatform.kext
invokes mergeEFIproperties() and mergeDSMproperties() for each device to
merge properties conveyed by EFI drivers as well as properties stored in
AML into the I/O Kit registry from which they can be retrieved by
drivers. We've been supporting EFI properties since commit
|
||
|
Rafael J. Wysocki
|
46436eb2f9 |
Merge branches 'acpi-soc', 'acpi-bus', 'acpi-pmic' and 'acpi-power'
* acpi-soc: ACPI / LPSS: Call pwm_add_table() for Bay Trail PWM device i2c: designware: Add ACPI HID for Hisilicon Hip07/08 I2C controller ACPI / APD: Add clock frequency for Hisilicon Hip07/08 I2C controller * acpi-bus: ACPI / bus: Add INT0002 to list of always-present devices ACPI / bus: Introduce a list of ids for "always present" devices * acpi-pmic: ACPI / PMIC: xpower: Fix power_table addresses * acpi-power: ACPI / power: Delay turning off unused power resources after suspend |
||
|
Hans de Goede
|
b7ecf663c7 |
ACPI / bus: Introduce a list of ids for "always present" devices
Several Bay / Cherry Trail devices (all of which ship with Windows 10) hide
the LPSS PWM controller in ACPI, typically the _STA method looks like this:
Method (_STA, 0, NotSerialized) // _STA: Status
{
If (OSID == One)
{
Return (Zero)
}
Return (0x0F)
}
Where OSID is some dark magic seen in all Cherry Trail ACPI tables making
the machine behave differently depending on which OS it *thinks* it is
booting, this gets set in a number of ways which we cannot control, on
some newer machines it simple hardcoded to "One" aka win10.
This causes the PWM controller to get hidden, which means Linux cannot
control the backlight level on cht based tablets / laptops.
Since loading the driver for this does no harm (the only in kernel user
of it is the i915 driver, which will only uses it when it needs it), this
commit makes acpi_bus_get_status() always set status to ACPI_STA_DEFAULT
for the LPSS PWM device, fixing the lack of backlight control.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
[ rjw: Rename the new file to utils.c ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
|
||
|
Hans de Goede
|
ac2c4936e9 |
ACPI / PMIC: Add opregion driver for Intel CHT Whiskey Cove PMIC
Add opregion driver for Intel CHT Whiskey Cove PMIC, based on various non upstreamed CHT Whiskey Cove PMIC patches. This does not include support for the Thermal opregion (DPTF) due to lacking documentation. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Josh Poimboeuf
|
61b79e16c6 |
ACPI: Fix incompatibility with mcount-based function graph tracing
Paul Menzel reported a warning:
WARNING: CPU: 0 PID: 774 at /build/linux-ROBWaj/linux-4.9.13/kernel/trace/trace_functions_graph.c:233 ftrace_return_to_handler+0x1aa/0x1e0
Bad frame pointer: expected f6919d98, received f6919db0
from func acpi_pm_device_sleep_wake return to c43b6f9d
The warning means that function graph tracing is broken for the
acpi_pm_device_sleep_wake() function. That's because the ACPI Makefile
unconditionally sets the '-Os' gcc flag to optimize for size. That's an
issue because mcount-based function graph tracing is incompatible with
'-Os' on x86, thanks to the following gcc bug:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42109
I have another patch pending which will ensure that mcount-based
function graph tracing is never used with CONFIG_CC_OPTIMIZE_FOR_SIZE on
x86.
But this patch is needed in addition to that one because the ACPI
Makefile overrides that config option for no apparent reason. It has
had this flag since the beginning of git history, and there's no related
comment, so I don't know why it's there. As far as I can tell, there's
no reason for it to be there. The appropriate behavior is for it to
honor CONFIG_CC_OPTIMIZE_FOR_{SIZE,PERFORMANCE} like the rest of the
kernel.
Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: All applicable <stable@vger.kernel.org>
|
||
|
Agustin Vega-Frias
|
d44fa3d460 |
ACPI: Add support for ResourceSource/IRQ domain mapping
ACPI extended IRQ resources may contain a ResourceSource to specify an alternate interrupt controller. Introduce acpi_irq_get and use it to implement ResourceSource/IRQ domain mapping. The new API is similar to of_irq_get and allows re-initialization of a platform resource from the ACPI extended IRQ resource, and provides proper behavior for probe deferral when the domain is not yet present when called. Acked-by: Rafael J. Wysocki <rafael@kernel.org> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Agustin Vega-Frias <agustinv@codeaurora.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> |
||
|
Linus Torvalds
|
e6dce825fb |
TTY/Serial patches for 4.9-rc1
Here is the big TTY and Serial patch set for 4.9-rc1. It also includes some drivers/dma/ changes, as those were needed by some serial drivers, and they were all acked by the DMA maintainer. Also in here is the long-suffering ACPI SPCR patchset, which was passed around from maintainer to maintainer like a hot-potato. Seems I was the sucker^Wlucky one. All of those patches have been acked by the various subsystem maintainers as well. All of this has been in linux-next with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iFYEABECABYFAlfyNjEPHGdyZWdAa3JvYWguY29tAAoJEDFH1A3bLfspwIcAn2uN qCD8xQJ0Cs61hD1nUzhNygG8AJ94I4zz/fPGpyh/CtJfLQwtUdLhNA== =Rken -----END PGP SIGNATURE----- Merge tag 'tty-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty and serial updates from Greg KH: "Here is the big tty and serial patch set for 4.9-rc1. It also includes some drivers/dma/ changes, as those were needed by some serial drivers, and they were all acked by the DMA maintainer. Also in here is the long-suffering ACPI SPCR patchset, which was passed around from maintainer to maintainer like a hot-potato. Seems I was the sucker^Wlucky one. All of those patches have been acked by the various subsystem maintainers as well. All of this has been in linux-next with no reported issues" * tag 'tty-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (111 commits) Revert "serial: pl011: add console matching function" MAINTAINERS: update entry for atmel_serial driver serial: pl011: add console matching function ARM64: ACPI: enable ACPI_SPCR_TABLE ACPI: parse SPCR and enable matching console of/serial: move earlycon early_param handling to serial Revert "drivers/tty: Explicitly pass current to show_stack" tty: amba-pl011: Don't complain on -EPROBE_DEFER when no irq nios2: dts: 10m50: Add tx-threshold parameter serial: 8250: Set Altera 16550 TX FIFO Threshold serial: 8250: of: Load TX FIFO Threshold from DT Documentation: dt: serial: Add TX FIFO threshold parameter drivers/tty: Explicitly pass current to show_stack serial: imx: Fix DCD reading serial: stm32: mark symbols static where possible serial: xuartps: Add some register initialisation to cdns_early_console_setup() serial: xuartps: Removed unwanted checks while reading the error conditions serial: xuartps: Rewrite the interrupt handling logic serial: stm32: use mapbase instead of membase for DMA tty/serial: atmel: fix fractional baud rate computation ... |
||
|
Linus Torvalds
|
999dcbe241 |
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq updates from Thomas Gleixner:
"The irq departement proudly presents:
- A rework of the core infrastructure to optimally spread interrupt
for multiqueue devices. The first version was a bit naive and
failed to take thread siblings and other details into account.
Developed in cooperation with Christoph and Keith.
- Proper delegation of softirqs to ksoftirqd, so if ksoftirqd is
active then no further softirq processsing on interrupt return
happens. Otherwise we try to delegate and still run another batch
of network packets in the irq return path, which then tries to
delegate to ksoftirqd .....
- A proper machine parseable sysfs based alternative for
/proc/interrupts.
- ACPI support for the GICV3-ITS and ARM interrupt remapping
- Two new irq chips from the ARM SoC zoo: STM32-EXTI and MVEBU-PIC
- A new irq chip for the JCore (SuperH)
- The usual pile of small fixlets in core and irqchip drivers"
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (42 commits)
softirq: Let ksoftirqd do its job
genirq: Make function __irq_do_set_handler() static
ARM/dts: Add EXTI controller node to stm32f429
ARM/STM32: Select external interrupts controller
drivers/irqchip: Add STM32 external interrupts support
Documentation/dt-bindings: Document STM32 EXTI controller bindings
irqchip/mips-gic: Use for_each_set_bit to iterate over local IRQs
pci/msi: Retrieve affinity for a vector
genirq/affinity: Remove old irq spread infrastructure
genirq/msi: Switch to new irq spreading infrastructure
genirq/affinity: Provide smarter irq spreading infrastructure
genirq/msi: Add cpumask allocation to alloc_msi_entry
genirq: Expose interrupt information through sysfs
irqchip/gicv3-its: Use MADT ITS subtable to do PCI/MSI domain initialization
irqchip/gicv3-its: Factor out PCI-MSI part that might be reused for ACPI
irqchip/gicv3-its: Probe ITS in the ACPI way
irqchip/gicv3-its: Refactor ITS DT init code to prepare for ACPI
irqchip/gicv3-its: Cleanup for ITS domain initialization
PCI/MSI: Setup MSI domain on a per-device basis using IORT ACPI table
ACPI: Add new IORT functions to support MSI domain handling
...
|
||
|
Aleksey Makarov
|
ad1696f6f0 |
ACPI: parse SPCR and enable matching console
'ARM Server Base Boot Requiremets' [1] mentions SPCR (Serial Port Console Redirection Table) [2] as a mandatory ACPI table that specifies the configuration of serial console. Defer initialization of DT earlycon until ACPI/DT decision is made. Parse the ACPI SPCR table, setup earlycon if required, enable specified console. Thanks to Peter Hurley for explaining how this should work. [1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0044a/index.html [2] https://msdn.microsoft.com/en-us/library/windows/hardware/dn639132(v=vs.85).aspx Signed-off-by: Aleksey Makarov <aleksey.makarov@linaro.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Tested-by: Kefeng Wang <wangkefeng.wang@huawei.com> Tested-by: Christopher Covington <cov@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
|
Mika Westerberg
|
058dfc7670 |
ACPI / watchdog: Add support for WDAT hardware watchdog
Starting from Intel Skylake the iTCO watchdog timer registers were moved to reside in the same register space with SMBus host controller. Not all needed registers are available though and we need to unhide P2SB (Primary to Sideband) device briefly to be able to read status of required NO_REBOOT bit. The i2c-i801.c SMBus driver used to handle this and creation of the iTCO watchdog platform device. Windows, on the other hand, does not use the iTCO watchdog hardware directly even if it is available. Instead it relies on ACPI Watchdog Action Table (WDAT) table to describe the watchdog hardware to the OS. This table contains necessary information about the the hardware and also set of actions which are executed by a driver as needed. This patch implements a new watchdog driver that takes advantage of the ACPI WDAT table. We split the functionality into two parts: first part enumerates the WDAT table and if found, populates resources and creates platform device for the actual driver. The second part is the driver itself. The reason for the split is that this way we can make the driver itself to be a module and loaded automatically if the WDAT table is found. Otherwise the module is not loaded. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Tomasz Nowicki
|
88ef16d888 |
ACPI: I/O Remapping Table (IORT) initial support
IORT shows representation of IO topology for ARM based systems. It describes how various components are connected together on parent-child basis e.g. PCI RC -> SMMU -> ITS. Also see IORT spec. http://infocenter.arm.com/help/topic/com.arm.doc.den0049b/DEN0049B_IO_Remapping_Table.pdf Initial support allows to detect IORT table presence and save its root pointer obtained through acpi_get_table(). The pointer validity depends on acpi_gbl_permanent_mmap because if acpi_gbl_permanent_mmap is not set while using IORT nodes we would dereference unmapped pointers. For the aforementioned reason call acpi_iort_init() from acpi_init() which guarantees acpi_gbl_permanent_mmap to be set at that point. Add generic helpers which are helpful for scanning and retrieving information from IORT table content. List of the most important helpers: - iort_find_dev_node() finds IORT node for a given device - iort_node_map_rid() maps device RID and returns IORT node which provides final translation IORT support is placed under drivers/acpi/arm64/ new directory due to its ARM64 specific nature. The code there is considered only for ARM64. The long term plan is to keep all ARM64 specific tables support in this place e.g. GTDT table. Signed-off-by: Tomasz Nowicki <tn@semihalf.com> Acked-by: Rafael J. Wysocki <rjw@rjwysocki.net> Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org> Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> |
||
|
Linus Torvalds
|
c8d0267efd |
PCI changes for the v4.8 merge window:
Enumeration
Move ecam.h to linux/include/pci-ecam.h (Jayachandran C)
Add parent device field to ECAM struct pci_config_window (Jayachandran C)
Add generic MCFG table handling (Tomasz Nowicki)
Refactor pci_bus_assign_domain_nr() for CONFIG_PCI_DOMAINS_GENERIC (Tomasz Nowicki)
Factor DT-specific pci_bus_find_domain_nr() code out (Tomasz Nowicki)
Resource management
Add devm_request_pci_bus_resources() (Bjorn Helgaas)
Unify pci_resource_to_user() declarations (Bjorn Helgaas)
Implement pci_resource_to_user() with pcibios_resource_to_bus() (microblaze, powerpc, sparc) (Bjorn Helgaas)
Request host bridge window resources (designware, iproc, rcar, xgene, xilinx, xilinx-nwl) (Bjorn Helgaas)
Make PCI I/O space optional on ARM32 (Bjorn Helgaas)
Ignore write combining when mapping I/O port space (Bjorn Helgaas)
Claim bus resources on MIPS PCI_PROBE_ONLY set-ups (Bjorn Helgaas)
Remove unicore32 pci=firmware command line parameter handling (Bjorn Helgaas)
Support I/O resources when parsing host bridge resources (Jayachandran C)
Add helpers to request/release memory and I/O regions (Johannes Thumshirn)
Use pci_(request|release)_mem_regions (NVMe, lpfc, GenWQE, ethernet/intel, alx) (Johannes Thumshirn)
Extend pci=resource_alignment to specify device/vendor IDs (Koehrer Mathias (ETAS/ESW5))
Add generic pci_bus_claim_resources() (Lorenzo Pieralisi)
Claim bus resources on ARM32 PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
Remove ARM32 and ARM64 arch-specific pcibios_enable_device() (Lorenzo Pieralisi)
Add pci_unmap_iospace() to unmap I/O resources (Sinan Kaya)
Remove powerpc __pci_mmap_set_pgprot() (Yinghai Lu)
PCI device hotplug
Allow additional bus numbers for hotplug bridges (Keith Busch)
Ignore interrupts during D3cold (Lukas Wunner)
Power management
Enforce type casting for pci_power_t (Andy Shevchenko)
Don't clear d3cold_allowed for PCIe ports (Mika Westerberg)
Put PCIe ports into D3 during suspend (Mika Westerberg)
Power on bridges before scanning new devices (Mika Westerberg)
Runtime resume bridge before rescan (Mika Westerberg)
Add runtime PM support for PCIe ports (Mika Westerberg)
Remove redundant check of pcie_set_clkpm (Shawn Lin)
Virtualization
Add function 1 DMA alias quirk for Marvell 88SE9182 (Aaron Sierra)
Add DMA alias quirk for Adaptec 3805 (Alex Williamson)
Mark Atheros AR9485 and QCA9882 to avoid bus reset (Chris Blake)
Add ACS quirk for Solarflare SFC9220 (Edward Cree)
MSI
Fix PCI_MSI dependencies (Arnd Bergmann)
Add pci_msix_desc_addr() helper (Christoph Hellwig)
Switch msix_program_entries() to use pci_msix_desc_addr() (Christoph Hellwig)
Make the "entries" argument to pci_enable_msix() optional (Christoph Hellwig)
Provide sensible IRQ vector alloc/free routines (Christoph Hellwig)
Spread interrupt vectors in pci_alloc_irq_vectors() (Christoph Hellwig)
Error Handling
Bind DPC to Root Ports as well as Downstream Ports (Keith Busch)
Remove DPC tristate module option (Keith Busch)
Convert Downstream Port Containment driver to use devm_* functions (Mika Westerberg)
Generic host bridge driver
Select IRQ_DOMAIN (Arnd Bergmann)
Claim bus resources on PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
ACPI host bridge driver
Add ARM64 acpi_pci_bus_find_domain_nr() (Tomasz Nowicki)
Add ARM64 ACPI support for legacy IRQs parsing and consolidation with DT code (Tomasz Nowicki)
Implement ARM64 AML accessors for PCI_Config region (Tomasz Nowicki)
Support ARM64 ACPI-based PCI host controller (Tomasz Nowicki)
Altera host bridge driver
Check link status before retrain link (Ley Foon Tan)
Poll for link up status after retraining the link (Ley Foon Tan)
Axis ARTPEC-6 host bridge driver
Add PCI_MSI_IRQ_DOMAIN dependency (Arnd Bergmann)
Add DT binding for Axis ARTPEC-6 PCIe controller (Niklas Cassel)
Add Axis ARTPEC-6 PCIe controller driver (Niklas Cassel)
Intel VMD host bridge driver
Use lock save/restore in interrupt enable path (Jon Derrick)
Select device dma ops to override (Keith Busch)
Initialize list item in IRQ disable (Keith Busch)
Use x86_vector_domain as parent domain (Keith Busch)
Separate MSI and MSI-X vector sharing (Keith Busch)
Marvell Aardvark host bridge driver
Add DT binding for the Aardvark PCIe controller (Thomas Petazzoni)
Add Aardvark PCI host controller driver (Thomas Petazzoni)
Add Aardvark PCIe support for Armada 3700 (Thomas Petazzoni)
Microsoft Hyper-V host bridge driver
Fix interrupt cleanup path (Cathy Avery)
Don't leak buffer in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
Handle all pending messages in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
NVIDIA Tegra host bridge driver
Program PADS_REFCLK_CFG* always, not just on legacy SoCs (Stephen Warren)
Program PADS_REFCLK_CFG* registers with per-SoC values (Stephen Warren)
Use lower-case hex consistently for register definitions (Thierry Reding)
Use generic pci_remap_iospace() rather than ARM32-specific one (Thierry Reding)
Stop setting pcibios_min_mem (Thierry Reding)
Renesas R-Car host bridge driver
Drop gen2 dummy I/O port region (Bjorn Helgaas)
TI DRA7xx host bridge driver
Fix return value in case of error (Christophe JAILLET)
Xilinx AXI host bridge driver
Fix return value in case of error (Christophe JAILLET)
Miscellaneous
Make bus_attr_resource_alignment static (Ben Dooks)
Include <asm/dma.h> for isa_dma_bridge_buggy (Ben Dooks)
MAINTAINERS: Add file patterns for PCI device tree bindings (Geert Uytterhoeven)
Make host bridge drivers explicitly non-modular (Paul Gortmaker)
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Merge tag 'pci-v4.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
"Highlights:
- ARM64 support for ACPI host bridges
- new drivers for Axis ARTPEC-6 and Marvell Aardvark
- new pci_alloc_irq_vectors() interface for MSI-X, MSI, legacy INTx
- pci_resource_to_user() cleanup (more to come)
Detailed summary:
Enumeration:
- Move ecam.h to linux/include/pci-ecam.h (Jayachandran C)
- Add parent device field to ECAM struct pci_config_window (Jayachandran C)
- Add generic MCFG table handling (Tomasz Nowicki)
- Refactor pci_bus_assign_domain_nr() for CONFIG_PCI_DOMAINS_GENERIC (Tomasz Nowicki)
- Factor DT-specific pci_bus_find_domain_nr() code out (Tomasz Nowicki)
Resource management:
- Add devm_request_pci_bus_resources() (Bjorn Helgaas)
- Unify pci_resource_to_user() declarations (Bjorn Helgaas)
- Implement pci_resource_to_user() with pcibios_resource_to_bus() (microblaze, powerpc, sparc) (Bjorn Helgaas)
- Request host bridge window resources (designware, iproc, rcar, xgene, xilinx, xilinx-nwl) (Bjorn Helgaas)
- Make PCI I/O space optional on ARM32 (Bjorn Helgaas)
- Ignore write combining when mapping I/O port space (Bjorn Helgaas)
- Claim bus resources on MIPS PCI_PROBE_ONLY set-ups (Bjorn Helgaas)
- Remove unicore32 pci=firmware command line parameter handling (Bjorn Helgaas)
- Support I/O resources when parsing host bridge resources (Jayachandran C)
- Add helpers to request/release memory and I/O regions (Johannes Thumshirn)
- Use pci_(request|release)_mem_regions (NVMe, lpfc, GenWQE, ethernet/intel, alx) (Johannes Thumshirn)
- Extend pci=resource_alignment to specify device/vendor IDs (Koehrer Mathias (ETAS/ESW5))
- Add generic pci_bus_claim_resources() (Lorenzo Pieralisi)
- Claim bus resources on ARM32 PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
- Remove ARM32 and ARM64 arch-specific pcibios_enable_device() (Lorenzo Pieralisi)
- Add pci_unmap_iospace() to unmap I/O resources (Sinan Kaya)
- Remove powerpc __pci_mmap_set_pgprot() (Yinghai Lu)
PCI device hotplug:
- Allow additional bus numbers for hotplug bridges (Keith Busch)
- Ignore interrupts during D3cold (Lukas Wunner)
Power management:
- Enforce type casting for pci_power_t (Andy Shevchenko)
- Don't clear d3cold_allowed for PCIe ports (Mika Westerberg)
- Put PCIe ports into D3 during suspend (Mika Westerberg)
- Power on bridges before scanning new devices (Mika Westerberg)
- Runtime resume bridge before rescan (Mika Westerberg)
- Add runtime PM support for PCIe ports (Mika Westerberg)
- Remove redundant check of pcie_set_clkpm (Shawn Lin)
Virtualization:
- Add function 1 DMA alias quirk for Marvell 88SE9182 (Aaron Sierra)
- Add DMA alias quirk for Adaptec 3805 (Alex Williamson)
- Mark Atheros AR9485 and QCA9882 to avoid bus reset (Chris Blake)
- Add ACS quirk for Solarflare SFC9220 (Edward Cree)
MSI:
- Fix PCI_MSI dependencies (Arnd Bergmann)
- Add pci_msix_desc_addr() helper (Christoph Hellwig)
- Switch msix_program_entries() to use pci_msix_desc_addr() (Christoph Hellwig)
- Make the "entries" argument to pci_enable_msix() optional (Christoph Hellwig)
- Provide sensible IRQ vector alloc/free routines (Christoph Hellwig)
- Spread interrupt vectors in pci_alloc_irq_vectors() (Christoph Hellwig)
Error Handling:
- Bind DPC to Root Ports as well as Downstream Ports (Keith Busch)
- Remove DPC tristate module option (Keith Busch)
- Convert Downstream Port Containment driver to use devm_* functions (Mika Westerberg)
Generic host bridge driver:
- Select IRQ_DOMAIN (Arnd Bergmann)
- Claim bus resources on PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
ACPI host bridge driver:
- Add ARM64 acpi_pci_bus_find_domain_nr() (Tomasz Nowicki)
- Add ARM64 ACPI support for legacy IRQs parsing and consolidation with DT code (Tomasz Nowicki)
- Implement ARM64 AML accessors for PCI_Config region (Tomasz Nowicki)
- Support ARM64 ACPI-based PCI host controller (Tomasz Nowicki)
Altera host bridge driver:
- Check link status before retrain link (Ley Foon Tan)
- Poll for link up status after retraining the link (Ley Foon Tan)
Axis ARTPEC-6 host bridge driver:
- Add PCI_MSI_IRQ_DOMAIN dependency (Arnd Bergmann)
- Add DT binding for Axis ARTPEC-6 PCIe controller (Niklas Cassel)
- Add Axis ARTPEC-6 PCIe controller driver (Niklas Cassel)
Intel VMD host bridge driver:
- Use lock save/restore in interrupt enable path (Jon Derrick)
- Select device dma ops to override (Keith Busch)
- Initialize list item in IRQ disable (Keith Busch)
- Use x86_vector_domain as parent domain (Keith Busch)
- Separate MSI and MSI-X vector sharing (Keith Busch)
Marvell Aardvark host bridge driver:
- Add DT binding for the Aardvark PCIe controller (Thomas Petazzoni)
- Add Aardvark PCI host controller driver (Thomas Petazzoni)
- Add Aardvark PCIe support for Armada 3700 (Thomas Petazzoni)
Microsoft Hyper-V host bridge driver:
- Fix interrupt cleanup path (Cathy Avery)
- Don't leak buffer in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
- Handle all pending messages in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
NVIDIA Tegra host bridge driver:
- Program PADS_REFCLK_CFG* always, not just on legacy SoCs (Stephen Warren)
- Program PADS_REFCLK_CFG* registers with per-SoC values (Stephen Warren)
- Use lower-case hex consistently for register definitions (Thierry Reding)
- Use generic pci_remap_iospace() rather than ARM32-specific one (Thierry Reding)
- Stop setting pcibios_min_mem (Thierry Reding)
Renesas R-Car host bridge driver:
- Drop gen2 dummy I/O port region (Bjorn Helgaas)
TI DRA7xx host bridge driver:
- Fix return value in case of error (Christophe JAILLET)
Xilinx AXI host bridge driver:
- Fix return value in case of error (Christophe JAILLET)
Miscellaneous:
- Make bus_attr_resource_alignment static (Ben Dooks)
- Include <asm/dma.h> for isa_dma_bridge_buggy (Ben Dooks)
- MAINTAINERS: Add file patterns for PCI device tree bindings (Geert Uytterhoeven)
- Make host bridge drivers explicitly non-modular (Paul Gortmaker)"
* tag 'pci-v4.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (125 commits)
PCI: xgene: Make explicitly non-modular
PCI: thunder-pem: Make explicitly non-modular
PCI: thunder-ecam: Make explicitly non-modular
PCI: tegra: Make explicitly non-modular
PCI: rcar-gen2: Make explicitly non-modular
PCI: rcar: Make explicitly non-modular
PCI: mvebu: Make explicitly non-modular
PCI: layerscape: Make explicitly non-modular
PCI: keystone: Make explicitly non-modular
PCI: hisi: Make explicitly non-modular
PCI: generic: Make explicitly non-modular
PCI: designware-plat: Make it explicitly non-modular
PCI: artpec6: Make explicitly non-modular
PCI: armada8k: Make explicitly non-modular
PCI: artpec: Add PCI_MSI_IRQ_DOMAIN dependency
PCI: Add ACS quirk for Solarflare SFC9220
arm64: dts: marvell: Add Aardvark PCIe support for Armada 3700
PCI: aardvark: Add Aardvark PCI host controller driver
dt-bindings: add DT binding for the Aardvark PCIe controller
PCI: tegra: Program PADS_REFCLK_CFG* registers with per-SoC values
...
|
||
|
Linus Torvalds
|
f0c98ebc57 |
libnvdimm for 4.8
1/ Replace pcommit with ADR / directed-flushing:
The pcommit instruction, which has not shipped on any product, is
deprecated. Instead, the requirement is that platforms implement either
ADR, or provide one or more flush addresses per nvdimm. ADR
(Asynchronous DRAM Refresh) flushes data in posted write buffers to the
memory controller on a power-fail event. Flush addresses are defined in
ACPI 6.x as an NVDIMM Firmware Interface Table (NFIT) sub-structure:
"Flush Hint Address Structure". A flush hint is an mmio address that
when written and fenced assures that all previous posted writes
targeting a given dimm have been flushed to media.
2/ On-demand ARS (address range scrub):
Linux uses the results of the ACPI ARS commands to track bad blocks
in pmem devices. When latent errors are detected we re-scrub the media
to refresh the bad block list, userspace can also request a re-scrub at
any time.
3/ Support for the Microsoft DSM (device specific method) command format.
4/ Support for EDK2/OVMF virtual disk device memory ranges.
5/ Various fixes and cleanups across the subsystem.
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Merge tag 'libnvdimm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams:
- Replace pcommit with ADR / directed-flushing.
The pcommit instruction, which has not shipped on any product, is
deprecated. Instead, the requirement is that platforms implement
either ADR, or provide one or more flush addresses per nvdimm.
ADR (Asynchronous DRAM Refresh) flushes data in posted write buffers
to the memory controller on a power-fail event.
Flush addresses are defined in ACPI 6.x as an NVDIMM Firmware
Interface Table (NFIT) sub-structure: "Flush Hint Address Structure".
A flush hint is an mmio address that when written and fenced assures
that all previous posted writes targeting a given dimm have been
flushed to media.
- On-demand ARS (address range scrub).
Linux uses the results of the ACPI ARS commands to track bad blocks
in pmem devices. When latent errors are detected we re-scrub the
media to refresh the bad block list, userspace can also request a
re-scrub at any time.
- Support for the Microsoft DSM (device specific method) command
format.
- Support for EDK2/OVMF virtual disk device memory ranges.
- Various fixes and cleanups across the subsystem.
* tag 'libnvdimm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (41 commits)
libnvdimm-btt: Delete an unnecessary check before the function call "__nd_device_register"
nfit: do an ARS scrub on hitting a latent media error
nfit: move to nfit/ sub-directory
nfit, libnvdimm: allow an ARS scrub to be triggered on demand
libnvdimm: register nvdimm_bus devices with an nd_bus driver
pmem: clarify a debug print in pmem_clear_poison
x86/insn: remove pcommit
Revert "KVM: x86: add pcommit support"
nfit, tools/testing/nvdimm/: unify shutdown paths
libnvdimm: move ->module to struct nvdimm_bus_descriptor
nfit: cleanup acpi_nfit_init calling convention
nfit: fix _FIT evaluation memory leak + use after free
tools/testing/nvdimm: add manufacturing_{date|location} dimm properties
tools/testing/nvdimm: add virtual ramdisk range
acpi, nfit: treat virtual ramdisk SPA as pmem region
pmem: kill __pmem address space
pmem: kill wmb_pmem()
libnvdimm, pmem: use nvdimm_flush() for namespace I/O writes
fs/dax: remove wmb_pmem()
libnvdimm, pmem: flush posted-write queues on shutdown
...
|
||
|
Rafael J. Wysocki
|
54d0b14ad7 |
Merge branches 'acpi-drivers', 'acpi-misc' and 'acpi-tools'
* acpi-drivers: ACPI / DPTF: move int340x_thermal.c to the DPTF folder ACPI / DPTF: Add DPTF power participant driver * acpi-misc: ACPI / lpat: make it explicitly non-modular ACPI / dock: make dock explicitly non-modular * acpi-tools: tools/acpi: use CROSS_COMPILE to define prefix |
||
|
Rafael J. Wysocki
|
273b5a4836 |
Merge branch 'acpi-pmic'
* acpi-pmic: ACPI / PMIC: remove modular references from non-modular code ACPI / PMIC: intel: initialize result to 0 ACPI / PMIC: intel: add REGS operation region support ACPI / PMIC: Add opregion driver for Intel BXT WhiskeyCove PMIC ACPI / PMIC: modify the pen function signature to take bit field Conflicts: drivers/acpi/Makefile |
||
|
Dan Williams
|
bdf97013ce |
nfit: move to nfit/ sub-directory
With the arrival of x86-machine-check support the nfit driver will add a (conditionally-compiled) source file. Prepare for this by moving all nfit source to drivers/acpi/nfit/. This is pure code movement, no functional changes. Signed-off-by: Dan Williams <dan.j.williams@intel.com> |
||
|
Srinivas Pandruvada
|
c11dd70fd7 |
ACPI / DPTF: move int340x_thermal.c to the DPTF folder
Since DPTF has its own folder under ACPI, move this file also there. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Srinivas Pandruvada
|
6256ebd5da |
ACPI / DPTF: Add DPTF power participant driver
This driver adds support for Dynamic Platform and Thermal Framework
(DPTF) Platform Power Participant device (INT3407) support.
This participant is responsible for exposing platform telemetry such as:
max_platform_power
platform_power_source
adapter_rating
battery_steady_power
charger_type
These attributes are presented via sysfs interface under the INT3407
platform device:
$ls /sys/bus/platform/devices/INT3407\:00/dptf_power/
adapter_rating_mw
battery_steady_power_mw
charger_type
max_platform_power_mw
platform_power_source
`
ACPI methods description used in this driver:
PMAX: Maximum platform power that can be supported by the battery in
mW.
PSRC: System charge source,
0x00 = DC
0x01 = AC
0x02 = USB
0x03 = Wireless Charger
ARTG: Adapter rating in mW (Maximum Adapter power) Must be 0 if no
AC adapter is plugged in.
CTYP: Charger Type,
Traditional : 0x01
Hybrid: 0x02
NVDC: 0x03
PBSS: Returns max sustained power for battery in milliWatts.
The INT3407 also contains _BTS and _BIX objects, which are compliant to
ACPI 5.0, specification. Those objects are already used by ACPI battery
(PNP0C0A) driver and information about them is exported via Linux power
supply class registration.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
|
||
|
Mika Westerberg
|
fafe5306f2 |
ACPI: Rename configfs.c to acpi_configfs.c to prevent link error
If we compile ACPI configfs.c as module it will confuse the linker as it hides symbols from the actual configfs: Kernel: arch/x86/boot/bzImage is ready (#1236) MODPOST 5739 modules ERROR: "configfs_unregister_subsystem" [samples/configfs/configfs_sample.ko] undefined! ERROR: "configfs_register_subsystem" [samples/configfs/configfs_sample.ko] undefined! ERROR: "config_group_init" [samples/configfs/configfs_sample.ko] undefined! ERROR: "config_item_init_type_name" [samples/configfs/configfs_sample.ko] undefined! ERROR: "config_group_init_type_name" [samples/configfs/configfs_sample.ko] undefined! ERROR: "configfs_undepend_item" [fs/ocfs2/cluster/ocfs2_nodemanager.ko] undefined! ... Prevent these by renaming the file to acpi_configfs.c instead. Reported-by: Scott Lawson <scott.lawson@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Octavian Purdila
|
0bf54fcd95 |
ACPI: add support for configfs
Register the ACPI subsystem with configfs. Signed-off-by: Octavian Purdila <octavian.purdila@intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Bin Gao
|
9b928c78bb |
ACPI / PMIC: Add opregion driver for Intel BXT WhiskeyCove PMIC
This patch adds operation region driver for Intel BXT WhiskeyCove PMIC. The register mapping is done as per the BXT WC data sheet. Signed-off-by: Ajay Thomas <ajay.thomas.david.rajamanickam@intel.com> Signed-off-by: Bin Gao <bin.gao@intel.com> Reviewed-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Tomasz Nowicki
|
935c760ec8 |
PCI/ACPI: Add generic MCFG table handling
On ACPI systems that support memory-mapped config space access, i.e., ECAM, the PCI Firmware Specification says the OS can learn where the ECAM space is from either: - the static MCFG table (for non-hotpluggable bridges), or - the _CBA method (for hotpluggable bridges) The current MCFG table handling code cannot be easily generalized owing to x86-specific quirks, which makes it hard to reuse on other architectures. Implement generic MCFG handling from scratch, including: - Simple MCFG table parsing (via pci_mmcfg_late_init() as in current x86) - MCFG region lookup for a (domain, bus_start, bus_end) tuple [bhelgaas: changelog] Signed-off-by: Tomasz Nowicki <tn@semihalf.com> Signed-off-by: Jayachandran C <jchandra@broadcom.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> |
||
|
Rafael J. Wysocki
|
efc499f980 |
Merge branches 'acpi-numa', 'acpi-tables' and 'acpi-osi'
* acpi-numa:
ACPI / SRAT: fix SRAT parsing order with both LAPIC and X2APIC present
* acpi-tables:
ACPI / tables: Fix DSDT override mechanism
ACPI / tables: Convert initrd table override to table upgrade mechanism
ACPI / x86: Cleanup initrd related code
ACPI / tables: Move table override mechanisms to tables.c
* acpi-osi:
ACPI / osi: Collect _OSI handling into one single file
ACPI / osi: Cleanup coding style issues before creating a separate OSI source file
ACPI / osi: Cleanup OSI handling code to use bool
ACPI / osi: Fix default _OSI(Darwin) support
ACPI / osi: Add acpi_osi=!! to allow reverting acpi_osi=!
ACPI / osi: Cleanup _OSI("Linux") related code before introducing new support
ACPI / osi: Fix an issue that acpi_osi=!* cannot disable ACPICA internal strings
Conflicts:
drivers/acpi/internal.h
|
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|
Lv Zheng
|
e5f660ebef |
ACPI / osi: Collect _OSI handling into one single file
_OSI handling code grows giant and it's time to move them into one file.
This patch collects all _OSI handling code into one single file.
So that we only have the following functions to be used externally:
early_acpi_osi_init(): Used by DMI detections;
acpi_osi_init(): Used to initialize OSI command line settings and install
Linux specific _OSI handler;
acpi_osi_setup(): The API that should be used by the external quirks.
acpi_osi_is_win8(): The API is used by the external drivers to determine
if BIOS supports Win8.
CONFIG_DMI is not useful as stub dmi_check_system() can make everything
stub because of strip.
No functional changes.
Tested-by: Lukas Wunner <lukas@wunner.de>
Tested-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
|
||
|
Sinan Kaya
|
3db80c230d |
ACPI: implement Generic Event Device
Generic Event Device described in ACPI 6.1 allows platforms to handle
platform interrupts in ACPI ASL statements. It borrows constructs like
_EVT from GPIO events. All interrupts are listed in _CRS and the handler
is written in _EVT method. Here is an example.
Device (GED0)
{
Name (_HID, "ACPI0013")
Name (_UID, 0)
Name(_CRS, ResourceTemplate ()
{
Interrupt(ResourceConsumer, Edge, ActiveHigh, Shared, , , )
{123}
})
Method (_EVT, 1) {
if (Lequal(123, Arg0))
{
}
}
}
Wake capability has not been implemented yet.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
|
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|
Graeme Gregory
|
6ce2e188a6 |
ACPI / scan: AMBA bus probing support
On ARM64 some devices use the AMBA device and not the platform bus for probing so add support for this. Uses a dummy clock for apb_pclk as ACPI does not have a suitable clock representation and to keep the core AMBA bus code unchanged between probing methods. Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org> Signed-off-by: Aleksey Makarov <aleksey.makarov@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
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Rafael J. Wysocki
|
476cc4333a |
Merge branches 'acpi-pci', 'acpi-irq' and 'acpi-assorted'
* acpi-pci: ACPI, PCI, irq: remove redundant check for null string pointer ACPI / PCI: Simplify acpi_penalize_isa_irq() ACPI, PCI, irq: remove interrupt number restriction ACPI, PCI, irq: remove interrupt count restriction * acpi-irq: ACPI / spi: attach GPIO IRQ from ACPI description to SPI device ACPI / gpio: Add irq_type when a GPIO is used as an interrupt ACPI: Rename acpi_gsi_get_irq_type to acpi_dev_get_irq_type and export symbol * acpi-assorted: ACPI / SBS: fix inconsistent indenting inside if statement ACPI: Fix build errors due objects compiled unconditionally |
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|
Lv Zheng
|
836d083018 |
ACPI / debugger: Add module support for ACPI debugger
This patch converts AML debugger into a loadable module. Note that, it implements driver unloading at the level dependent on the module reference count. Which means if ACPI debugger is being used by a userspace program, "rmmod acpi_dbg" should result in failure. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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|
Lv Zheng
|
8cfb0cdf07 |
ACPI / debugger: Add IO interface to access debugger functionalities
This patch adds /sys/kernel/debug/acpi/acpidbg, which can be used by userspace programs to access ACPICA debugger functionalities. Known issue: 1. IO flush support acpi_os_notify_command_complete() and acpi_os_wait_command_ready() can be used by acpi_dbg module to implement .flush() filesystem operation. While this patch doesn't go that far. It then becomes userspace tool's duty now to flush old commands before executing new batch mode commands. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Javier Martinez Canillas
|
08dc7c7e40 |
ACPI: Fix build errors due objects compiled unconditionally
If the CONFIG_ACPI Kconfig symbol is not enabled and a partial build is attempted, compile errors will happen due missing types and identifiers. This can be easily reproduced with the following commands: $ export CROSS_COMPILE="arm-linux-gnueabihf-" ARCH=arm $ make allmodconfig $ make M=drivers/acpi/ CC drivers/acpi//tables.o drivers/acpi//tables.c:235:3: warning: 'struct acpi_subtable_proc' declared inside parameter list unsigned int max_entries) ^ drivers/acpi//tables.c:235:3: warning: its scope is only this definition or declaration, which is probably not what you want drivers/acpi//tables.c: In function 'acpi_parse_entries_array': drivers/acpi//tables.c:269:4: error: invalid use of undefined type 'struct acpi_subtable_proc' ... scripts/Makefile.build:258: recipe for target 'drivers/acpi//tables.o' failed make[1]: *** [drivers/acpi//tables.o] Error 1 Makefile:1401: recipe for target '_module_drivers/acpi/' failed make: *** [_module_drivers/acpi/] Error 2 This is because objects are tried to be built unconditionally even when CONFIG_ACPI is not enabled. This is usually not a problem since arches' Kconfig sources drivers/acpi/Kconfig directly and also selects ACPI but the Makefile should conditionally build the objects as well to prevent these build errors. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Ashwin Chaugule
|
337aadff8e |
ACPI: Introduce CPU performance controls using CPPC
CPPC stands for Collaborative Processor Performance Controls and is defined in the ACPI v5.0+ spec. It describes CPU performance controls on an abstract and continuous scale allowing the platform (e.g. remote power processor) to flexibly optimize CPU performance with its knowledge of power budgets and other architecture specific knowledge. This patch adds a shim which exports commonly used functions to get and set CPPC specific controls for each CPU. This enables CPUFreq drivers to gather per CPU performance data and use with exisiting governors or even allows for customized governors which are implemented inside CPUFreq drivers. Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org> Reviewed-by: Al Stone <al.stone@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Rafael J. Wysocki
|
73990fc810 |
Merge branches 'acpi-scan', 'acpi-processor' and 'acpi-assorted'
* acpi-scan: ACPI / bus: Move ACPI bus type registration ACPI / scan: Move bus operations and notification routines to bus.c ACPI / scan: Move device matching code to bus.c ACPI / scan: Move sysfs-related device code to a separate file * acpi-processor: PCC: Disable compilation by default ACPI: Decouple ACPI idle and ACPI processor drivers ACPI: Split out ACPI PSS from ACPI Processor driver PCC: Initialize PCC Mailbox earlier at boot ACPI / processor: remove leftover __refdata annotations * acpi-assorted: ACPI: fix acpi_debugfs_init prototype ACPI: Remove FSF mailing addresses |
||
|
Ashwin Chaugule
|
5f05586c60 |
ACPI: Decouple ACPI idle and ACPI processor drivers
This patch introduces a new Kconfig symbol, ACPI_PROCESSOR_IDLE, which is auto selected by architectures which support the ACPI based C states for CPU Idle management. The processor_idle driver in its present form contains declarations specific to X86 and IA64. Since there are no reasonable defaults for other architectures e.g. ARM64, the driver is selected only for X86 or IA64. This helps in decoupling the ACPI processor_driver from the ACPI processor_idle driver which is useful for the upcoming alternative patchwork for controlling CPU Performance (CPPC) and CPU Idle (LPI). Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Ashwin Chaugule
|
239708a3af |
ACPI: Split out ACPI PSS from ACPI Processor driver
The ACPI processor driver is currently tied too closely to the ACPI P-states (PSS) and other related constructs for controlling CPU performance. The newer ACPI specification (v5.1 onwards) introduces alternative methods to PSS. These new mechanisms are described within each ACPI Processor object and so they need to be scanned whenever a new Processor object is detected. This patch introduces a new Kconfig symbol to allow for finer configurability among the two options for controlling performance states. There is no change in functionality and the option is auto-selected by the architectures which support it. A future commit will introduce support for CPPC: A newer method of controlling CPU performance. The OS is not expected to support CPPC and PSS at the same time, so the Kconfig option lets us make the two mutually exclusive at compile time. Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org> [ rjw: Changelog ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Rafael J. Wysocki
|
c2efefb33a |
ACPI / scan: Move sysfs-related device code to a separate file
To reduce the size of scan.c and improve the readability of it, move all code related to device sysfs, modalias creation etc. to a new file called device_sysfs.c. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Linus Torvalds
|
88793e5c77 |
The libnvdimm sub-system introduces, in addition to the libnvdimm-core,
4 drivers / enabling modules:
NFIT:
Instantiates an "nvdimm bus" with the core and registers memory devices
(NVDIMMs) enumerated by the ACPI 6.0 NFIT (NVDIMM Firmware Interface
table). After registering NVDIMMs the NFIT driver then registers
"region" devices. A libnvdimm-region defines an access mode and the
boundaries of persistent memory media. A region may span multiple
NVDIMMs that are interleaved by the hardware memory controller. In
turn, a libnvdimm-region can be carved into a "namespace" device and
bound to the PMEM or BLK driver which will attach a Linux block device
(disk) interface to the memory.
PMEM:
Initially merged in v4.1 this driver for contiguous spans of persistent
memory address ranges is re-worked to drive PMEM-namespaces emitted by
the libnvdimm-core. In this update the PMEM driver, on x86, gains the
ability to assert that writes to persistent memory have been flushed all
the way through the caches and buffers in the platform to persistent
media. See memcpy_to_pmem() and wmb_pmem().
BLK:
This new driver enables access to persistent memory media through "Block
Data Windows" as defined by the NFIT. The primary difference of this
driver to PMEM is that only a small window of persistent memory is
mapped into system address space at any given point in time. Per-NVDIMM
windows are reprogrammed at run time, per-I/O, to access different
portions of the media. BLK-mode, by definition, does not support DAX.
BTT:
This is a library, optionally consumed by either PMEM or BLK, that
converts a byte-accessible namespace into a disk with atomic sector
update semantics (prevents sector tearing on crash or power loss). The
sinister aspect of sector tearing is that most applications do not know
they have a atomic sector dependency. At least today's disk's rarely
ever tear sectors and if they do one almost certainly gets a CRC error
on access. NVDIMMs will always tear and always silently. Until an
application is audited to be robust in the presence of sector-tearing
the usage of BTT is recommended.
Thanks to: Ross Zwisler, Jeff Moyer, Vishal Verma, Christoph Hellwig,
Ingo Molnar, Neil Brown, Boaz Harrosh, Robert Elliott, Matthew Wilcox,
Andy Rudoff, Linda Knippers, Toshi Kani, Nicholas Moulin, Rafael
Wysocki, and Bob Moore.
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Merge tag 'libnvdimm-for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm
Pull libnvdimm subsystem from Dan Williams:
"The libnvdimm sub-system introduces, in addition to the
libnvdimm-core, 4 drivers / enabling modules:
NFIT:
Instantiates an "nvdimm bus" with the core and registers memory
devices (NVDIMMs) enumerated by the ACPI 6.0 NFIT (NVDIMM Firmware
Interface table).
After registering NVDIMMs the NFIT driver then registers "region"
devices. A libnvdimm-region defines an access mode and the
boundaries of persistent memory media. A region may span multiple
NVDIMMs that are interleaved by the hardware memory controller. In
turn, a libnvdimm-region can be carved into a "namespace" device and
bound to the PMEM or BLK driver which will attach a Linux block
device (disk) interface to the memory.
PMEM:
Initially merged in v4.1 this driver for contiguous spans of
persistent memory address ranges is re-worked to drive
PMEM-namespaces emitted by the libnvdimm-core.
In this update the PMEM driver, on x86, gains the ability to assert
that writes to persistent memory have been flushed all the way
through the caches and buffers in the platform to persistent media.
See memcpy_to_pmem() and wmb_pmem().
BLK:
This new driver enables access to persistent memory media through
"Block Data Windows" as defined by the NFIT. The primary difference
of this driver to PMEM is that only a small window of persistent
memory is mapped into system address space at any given point in
time.
Per-NVDIMM windows are reprogrammed at run time, per-I/O, to access
different portions of the media. BLK-mode, by definition, does not
support DAX.
BTT:
This is a library, optionally consumed by either PMEM or BLK, that
converts a byte-accessible namespace into a disk with atomic sector
update semantics (prevents sector tearing on crash or power loss).
The sinister aspect of sector tearing is that most applications do
not know they have a atomic sector dependency. At least today's
disk's rarely ever tear sectors and if they do one almost certainly
gets a CRC error on access. NVDIMMs will always tear and always
silently. Until an application is audited to be robust in the
presence of sector-tearing the usage of BTT is recommended.
Thanks to: Ross Zwisler, Jeff Moyer, Vishal Verma, Christoph Hellwig,
Ingo Molnar, Neil Brown, Boaz Harrosh, Robert Elliott, Matthew Wilcox,
Andy Rudoff, Linda Knippers, Toshi Kani, Nicholas Moulin, Rafael
Wysocki, and Bob Moore"
* tag 'libnvdimm-for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm: (33 commits)
arch, x86: pmem api for ensuring durability of persistent memory updates
libnvdimm: Add sysfs numa_node to NVDIMM devices
libnvdimm: Set numa_node to NVDIMM devices
acpi: Add acpi_map_pxm_to_online_node()
libnvdimm, nfit: handle unarmed dimms, mark namespaces read-only
pmem: flag pmem block devices as non-rotational
libnvdimm: enable iostat
pmem: make_request cleanups
libnvdimm, pmem: fix up max_hw_sectors
libnvdimm, blk: add support for blk integrity
libnvdimm, btt: add support for blk integrity
fs/block_dev.c: skip rw_page if bdev has integrity
libnvdimm: Non-Volatile Devices
tools/testing/nvdimm: libnvdimm unit test infrastructure
libnvdimm, nfit, nd_blk: driver for BLK-mode access persistent memory
nd_btt: atomic sector updates
libnvdimm: infrastructure for btt devices
libnvdimm: write blk label set
libnvdimm: write pmem label set
libnvdimm: blk labels and namespace instantiation
...
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