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b24413180f
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>
209 lines
5.7 KiB
C
209 lines
5.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Intel OnChip System Fabric MailBox access support
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*/
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#ifndef IOSF_MBI_SYMS_H
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#define IOSF_MBI_SYMS_H
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#include <linux/notifier.h>
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#define MBI_MCR_OFFSET 0xD0
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#define MBI_MDR_OFFSET 0xD4
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#define MBI_MCRX_OFFSET 0xD8
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#define MBI_RD_MASK 0xFEFFFFFF
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#define MBI_WR_MASK 0X01000000
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#define MBI_MASK_HI 0xFFFFFF00
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#define MBI_MASK_LO 0x000000FF
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#define MBI_ENABLE 0xF0
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/* IOSF SB read/write opcodes */
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#define MBI_MMIO_READ 0x00
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#define MBI_MMIO_WRITE 0x01
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#define MBI_CFG_READ 0x04
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#define MBI_CFG_WRITE 0x05
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#define MBI_CR_READ 0x06
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#define MBI_CR_WRITE 0x07
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#define MBI_REG_READ 0x10
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#define MBI_REG_WRITE 0x11
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#define MBI_ESRAM_READ 0x12
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#define MBI_ESRAM_WRITE 0x13
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/* Baytrail available units */
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#define BT_MBI_UNIT_AUNIT 0x00
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#define BT_MBI_UNIT_SMC 0x01
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#define BT_MBI_UNIT_CPU 0x02
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#define BT_MBI_UNIT_BUNIT 0x03
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#define BT_MBI_UNIT_PMC 0x04
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#define BT_MBI_UNIT_GFX 0x06
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#define BT_MBI_UNIT_SMI 0x0C
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#define BT_MBI_UNIT_USB 0x43
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#define BT_MBI_UNIT_SATA 0xA3
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#define BT_MBI_UNIT_PCIE 0xA6
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/* Quark available units */
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#define QRK_MBI_UNIT_HBA 0x00
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#define QRK_MBI_UNIT_HB 0x03
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#define QRK_MBI_UNIT_RMU 0x04
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#define QRK_MBI_UNIT_MM 0x05
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#define QRK_MBI_UNIT_SOC 0x31
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/* Action values for the pmic_bus_access_notifier functions */
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#define MBI_PMIC_BUS_ACCESS_BEGIN 1
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#define MBI_PMIC_BUS_ACCESS_END 2
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#if IS_ENABLED(CONFIG_IOSF_MBI)
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bool iosf_mbi_available(void);
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/**
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* iosf_mbi_read() - MailBox Interface read command
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* @port: port indicating subunit being accessed
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* @opcode: port specific read or write opcode
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* @offset: register address offset
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* @mdr: register data to be read
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*
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* Locking is handled by spinlock - cannot sleep.
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* Return: Nonzero on error
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*/
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int iosf_mbi_read(u8 port, u8 opcode, u32 offset, u32 *mdr);
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/**
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* iosf_mbi_write() - MailBox unmasked write command
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* @port: port indicating subunit being accessed
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* @opcode: port specific read or write opcode
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* @offset: register address offset
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* @mdr: register data to be written
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*
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* Locking is handled by spinlock - cannot sleep.
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* Return: Nonzero on error
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*/
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int iosf_mbi_write(u8 port, u8 opcode, u32 offset, u32 mdr);
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/**
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* iosf_mbi_modify() - MailBox masked write command
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* @port: port indicating subunit being accessed
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* @opcode: port specific read or write opcode
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* @offset: register address offset
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* @mdr: register data being modified
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* @mask: mask indicating bits in mdr to be modified
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*
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* Locking is handled by spinlock - cannot sleep.
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* Return: Nonzero on error
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*/
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int iosf_mbi_modify(u8 port, u8 opcode, u32 offset, u32 mdr, u32 mask);
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/**
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* iosf_mbi_punit_acquire() - Acquire access to the P-Unit
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*
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* One some systems the P-Unit accesses the PMIC to change various voltages
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* through the same bus as other kernel drivers use for e.g. battery monitoring.
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*
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* If a driver sends requests to the P-Unit which require the P-Unit to access
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* the PMIC bus while another driver is also accessing the PMIC bus various bad
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* things happen.
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*
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* To avoid these problems this function must be called before accessing the
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* P-Unit or the PMIC, be it through iosf_mbi* functions or through other means.
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*
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* Note on these systems the i2c-bus driver will request a sempahore from the
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* P-Unit for exclusive access to the PMIC bus when i2c drivers are accessing
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* it, but this does not appear to be sufficient, we still need to avoid making
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* certain P-Unit requests during the access window to avoid problems.
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*
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* This function locks a mutex, as such it may sleep.
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*/
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void iosf_mbi_punit_acquire(void);
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/**
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* iosf_mbi_punit_release() - Release access to the P-Unit
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*/
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void iosf_mbi_punit_release(void);
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/**
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* iosf_mbi_register_pmic_bus_access_notifier - Register PMIC bus notifier
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*
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* This function can be used by drivers which may need to acquire P-Unit
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* managed resources from interrupt context, where iosf_mbi_punit_acquire()
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* can not be used.
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*
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* This function allows a driver to register a notifier to get notified (in a
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* process context) before other drivers start accessing the PMIC bus.
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*
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* This allows the driver to acquire any resources, which it may need during
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* the window the other driver is accessing the PMIC, before hand.
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*
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* @nb: notifier_block to register
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*/
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int iosf_mbi_register_pmic_bus_access_notifier(struct notifier_block *nb);
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/**
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* iosf_mbi_register_pmic_bus_access_notifier - Unregister PMIC bus notifier
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*
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* @nb: notifier_block to unregister
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*/
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int iosf_mbi_unregister_pmic_bus_access_notifier(struct notifier_block *nb);
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/**
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* iosf_mbi_call_pmic_bus_access_notifier_chain - Call PMIC bus notifier chain
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*
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* @val: action to pass into listener's notifier_call function
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* @v: data pointer to pass into listener's notifier_call function
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*/
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int iosf_mbi_call_pmic_bus_access_notifier_chain(unsigned long val, void *v);
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#else /* CONFIG_IOSF_MBI is not enabled */
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static inline
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bool iosf_mbi_available(void)
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{
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return false;
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}
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static inline
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int iosf_mbi_read(u8 port, u8 opcode, u32 offset, u32 *mdr)
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{
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WARN(1, "IOSF_MBI driver not available");
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return -EPERM;
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}
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static inline
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int iosf_mbi_write(u8 port, u8 opcode, u32 offset, u32 mdr)
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{
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WARN(1, "IOSF_MBI driver not available");
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return -EPERM;
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}
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static inline
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int iosf_mbi_modify(u8 port, u8 opcode, u32 offset, u32 mdr, u32 mask)
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{
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WARN(1, "IOSF_MBI driver not available");
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return -EPERM;
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}
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static inline void iosf_mbi_punit_acquire(void) {}
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static inline void iosf_mbi_punit_release(void) {}
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static inline
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int iosf_mbi_register_pmic_bus_access_notifier(struct notifier_block *nb)
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{
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return 0;
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}
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static inline
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int iosf_mbi_unregister_pmic_bus_access_notifier(struct notifier_block *nb)
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{
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return 0;
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}
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static inline
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int iosf_mbi_call_pmic_bus_access_notifier_chain(unsigned long val, void *v)
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{
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return 0;
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}
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#endif /* CONFIG_IOSF_MBI */
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#endif /* IOSF_MBI_SYMS_H */
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