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>
2017-11-01 22:07:57 +08:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2005-04-17 06:20:36 +08:00
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/*
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* File pci-acpi.h
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*
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* Copyright (C) 2004 Intel
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* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
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*/
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#ifndef _PCI_ACPI_H_
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#define _PCI_ACPI_H_
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2008-11-11 06:30:40 +08:00
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#include <linux/acpi.h>
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2005-04-17 06:20:36 +08:00
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#ifdef CONFIG_ACPI
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2014-07-23 07:00:45 +08:00
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extern acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev);
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static inline acpi_status pci_acpi_remove_bus_pm_notifier(struct acpi_device *dev)
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{
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return acpi_remove_pm_notifier(dev);
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}
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2010-02-18 06:44:09 +08:00
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extern acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev,
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struct pci_dev *pci_dev);
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2014-07-23 07:00:45 +08:00
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static inline acpi_status pci_acpi_remove_pm_notifier(struct acpi_device *dev)
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{
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return acpi_remove_pm_notifier(dev);
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}
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2012-06-22 14:55:16 +08:00
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extern phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle);
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2010-02-18 06:44:09 +08:00
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2016-09-10 03:24:03 +08:00
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struct pci_ecam_ops;
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extern int pci_mcfg_lookup(struct acpi_pci_root *root, struct resource *cfgres,
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2020-04-10 07:49:21 +08:00
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const struct pci_ecam_ops **ecam_ops);
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2016-06-11 03:55:13 +08:00
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2008-08-19 02:22:54 +08:00
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static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
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{
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2009-02-17 13:12:36 +08:00
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struct pci_bus *pbus = pdev->bus;
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2012-09-25 04:51:23 +08:00
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2009-02-17 13:12:36 +08:00
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/* Find a PCI root bus */
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2009-05-26 15:05:33 +08:00
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while (!pci_is_root_bus(pbus))
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2009-02-17 13:12:36 +08:00
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pbus = pbus->parent;
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2012-09-25 04:51:23 +08:00
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2013-11-15 06:17:21 +08:00
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return ACPI_HANDLE(pbus->bridge);
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2008-08-19 02:22:54 +08:00
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}
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2008-12-17 11:09:12 +08:00
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static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
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{
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2012-09-25 04:51:23 +08:00
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struct device *dev;
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if (pci_is_root_bus(pbus))
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dev = pbus->bridge;
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2014-10-31 00:17:25 +08:00
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else {
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/* If pbus is a virtual bus, there is no bridge to it */
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if (!pbus->self)
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return NULL;
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2012-09-25 04:51:23 +08:00
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dev = &pbus->self->dev;
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2014-10-31 00:17:25 +08:00
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}
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2012-09-25 04:51:23 +08:00
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2013-11-15 06:17:21 +08:00
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return ACPI_HANDLE(dev);
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2008-12-17 11:09:12 +08:00
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}
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2013-04-12 13:44:21 +08:00
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2015-10-14 14:29:39 +08:00
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struct acpi_pci_root;
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struct acpi_pci_root_ops;
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struct acpi_pci_root_info {
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struct acpi_pci_root *root;
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struct acpi_device *bridge;
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struct acpi_pci_root_ops *ops;
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struct list_head resources;
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char name[16];
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};
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struct acpi_pci_root_ops {
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struct pci_ops *pci_ops;
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int (*init_info)(struct acpi_pci_root_info *info);
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void (*release_info)(struct acpi_pci_root_info *info);
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int (*prepare_resources)(struct acpi_pci_root_info *info);
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};
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extern int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info);
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extern struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
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struct acpi_pci_root_ops *ops,
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struct acpi_pci_root_info *info,
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void *sd);
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2013-04-12 13:44:21 +08:00
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void acpi_pci_add_bus(struct pci_bus *bus);
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void acpi_pci_remove_bus(struct pci_bus *bus);
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2013-04-12 13:44:24 +08:00
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2021-09-18 20:53:44 +08:00
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#ifdef CONFIG_PCI
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void pci_acpi_setup(struct device *dev, struct acpi_device *adev);
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void pci_acpi_cleanup(struct device *dev, struct acpi_device *adev);
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#else
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static inline void pci_acpi_setup(struct device *dev, struct acpi_device *adev) {}
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static inline void pci_acpi_cleanup(struct device *dev, struct acpi_device *adev) {}
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#endif
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2013-04-12 13:44:24 +08:00
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#ifdef CONFIG_ACPI_PCI_SLOT
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void acpi_pci_slot_init(void);
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2013-07-14 05:27:23 +08:00
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void acpi_pci_slot_enumerate(struct pci_bus *bus);
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2013-04-12 13:44:24 +08:00
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void acpi_pci_slot_remove(struct pci_bus *bus);
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#else
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static inline void acpi_pci_slot_init(void) { }
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2013-07-14 05:27:23 +08:00
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static inline void acpi_pci_slot_enumerate(struct pci_bus *bus) { }
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2013-04-12 13:44:24 +08:00
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static inline void acpi_pci_slot_remove(struct pci_bus *bus) { }
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#endif
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2013-04-12 13:44:26 +08:00
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#ifdef CONFIG_HOTPLUG_PCI_ACPI
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void acpiphp_init(void);
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2013-07-14 05:27:23 +08:00
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void acpiphp_enumerate_slots(struct pci_bus *bus);
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2013-04-12 13:44:26 +08:00
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void acpiphp_remove_slots(struct pci_bus *bus);
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2014-02-04 07:45:13 +08:00
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void acpiphp_check_host_bridge(struct acpi_device *adev);
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2013-04-12 13:44:26 +08:00
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#else
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static inline void acpiphp_init(void) { }
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2013-07-14 05:27:23 +08:00
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static inline void acpiphp_enumerate_slots(struct pci_bus *bus) { }
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2013-04-12 13:44:26 +08:00
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static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
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2014-02-04 07:45:13 +08:00
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static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { }
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2013-04-12 13:44:26 +08:00
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#endif
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2017-06-06 00:40:46 +08:00
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extern const guid_t pci_acpi_dsm_guid;
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2020-05-27 05:39:05 +08:00
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/* _DSM Definitions for PCI */
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#define DSM_PCI_PRESERVE_BOOT_CONFIG 0x05
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#define DSM_PCI_DEVICE_NAME 0x07
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#define DSM_PCI_POWER_ON_RESET_DELAY 0x08
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#define DSM_PCI_DEVICE_READINESS_DURATIONS 0x09
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2015-03-25 14:31:41 +08:00
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PCI/DPC: Add Error Disconnect Recover (EDR) support
Error Disconnect Recover (EDR) is a feature that allows ACPI firmware to
notify OSPM that a device has been disconnected due to an error condition
(ACPI v6.3, sec 5.6.6). OSPM advertises its support for EDR on PCI devices
via _OSC (see [1], sec 4.5.1, table 4-4). The OSPM EDR notify handler
should invalidate software state associated with disconnected devices and
may attempt to recover them. OSPM communicates the status of recovery to
the firmware via _OST (sec 6.3.5.2).
For PCIe, firmware may use Downstream Port Containment (DPC) to support
EDR. Per [1], sec 4.5.1, table 4-6, even if firmware has retained control
of DPC, OSPM may read/write DPC control and status registers during the EDR
notification processing window, i.e., from the time it receives an EDR
notification until it clears the DPC Trigger Status.
Note that per [1], sec 4.5.1 and 4.5.2.4,
1. If the OS supports EDR, it should advertise that to firmware by
setting OSC_PCI_EDR_SUPPORT in _OSC Support.
2. If the OS sets OSC_PCI_EXPRESS_DPC_CONTROL in _OSC Control to request
control of the DPC capability, it must also set OSC_PCI_EDR_SUPPORT in
_OSC Support.
Add an EDR notify handler to attempt recovery.
[1] Downstream Port Containment Related Enhancements ECN, Jan 28, 2019,
affecting PCI Firmware Specification, Rev. 3.2
https://members.pcisig.com/wg/PCI-SIG/document/12888
[bhelgaas: squash add/enable patches into one]
Link: https://lore.kernel.org/r/90f91fe6d25c13f9d2255d2ce97ca15be307e1bb.1585000084.git.sathyanarayanan.kuppuswamy@linux.intel.com
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Len Brown <lenb@kernel.org>
2020-03-24 08:26:07 +08:00
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#ifdef CONFIG_PCIE_EDR
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void pci_acpi_add_edr_notifier(struct pci_dev *pdev);
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void pci_acpi_remove_edr_notifier(struct pci_dev *pdev);
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#else
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static inline void pci_acpi_add_edr_notifier(struct pci_dev *pdev) { }
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static inline void pci_acpi_remove_edr_notifier(struct pci_dev *pdev) { }
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#endif /* CONFIG_PCIE_EDR */
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2021-08-24 22:43:55 +08:00
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int pci_acpi_set_companion_lookup_hook(struct acpi_device *(*func)(struct pci_dev *));
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void pci_acpi_clear_companion_lookup_hook(void);
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2013-04-12 13:44:21 +08:00
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#else /* CONFIG_ACPI */
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static inline void acpi_pci_add_bus(struct pci_bus *bus) { }
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static inline void acpi_pci_remove_bus(struct pci_bus *bus) { }
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#endif /* CONFIG_ACPI */
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2005-04-17 06:20:36 +08:00
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#endif /* _PCI_ACPI_H_ */
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