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linux-next/drivers/sh/intc/internals.h
Greg Kroah-Hartman 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>
2017-11-02 11:10:55 +01:00

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/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/sh_intc.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/radix-tree.h>
#include <linux/device.h>
#define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
((addr_e) << 16) | ((addr_d << 24)))
#define _INTC_SHIFT(h) (h & 0x1f)
#define _INTC_WIDTH(h) ((h >> 5) & 0xf)
#define _INTC_FN(h) ((h >> 9) & 0xf)
#define _INTC_MODE(h) ((h >> 13) & 0x7)
#define _INTC_ADDR_E(h) ((h >> 16) & 0xff)
#define _INTC_ADDR_D(h) ((h >> 24) & 0xff)
#ifdef CONFIG_SMP
#define IS_SMP(x) (x.smp)
#define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
#define SMP_NR(d, x) ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)
#else
#define IS_SMP(x) 0
#define INTC_REG(d, x, c) (d->reg[(x)])
#define SMP_NR(d, x) 1
#endif
struct intc_handle_int {
unsigned int irq;
unsigned long handle;
};
struct intc_window {
phys_addr_t phys;
void __iomem *virt;
unsigned long size;
};
struct intc_map_entry {
intc_enum enum_id;
struct intc_desc_int *desc;
};
struct intc_subgroup_entry {
unsigned int pirq;
intc_enum enum_id;
unsigned long handle;
};
struct intc_desc_int {
struct list_head list;
struct device dev;
struct radix_tree_root tree;
raw_spinlock_t lock;
unsigned int index;
unsigned long *reg;
#ifdef CONFIG_SMP
unsigned long *smp;
#endif
unsigned int nr_reg;
struct intc_handle_int *prio;
unsigned int nr_prio;
struct intc_handle_int *sense;
unsigned int nr_sense;
struct intc_window *window;
unsigned int nr_windows;
struct irq_domain *domain;
struct irq_chip chip;
bool skip_suspend;
};
enum {
REG_FN_ERR = 0,
REG_FN_TEST_BASE = 1,
REG_FN_WRITE_BASE = 5,
REG_FN_MODIFY_BASE = 9
};
enum { MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */
MODE_MASK_REG, /* Bit(s) set -> interrupt disabled */
MODE_DUAL_REG, /* Two registers, set bit to enable / disable */
MODE_PRIO_REG, /* Priority value written to enable interrupt */
MODE_PCLR_REG, /* Above plus all bits set to disable interrupt */
};
static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
{
struct irq_chip *chip = irq_get_chip(irq);
return container_of(chip, struct intc_desc_int, chip);
}
/*
* Grumble.
*/
static inline void activate_irq(int irq)
{
irq_modify_status(irq, IRQ_NOREQUEST, IRQ_NOPROBE);
}
static inline int intc_handle_int_cmp(const void *a, const void *b)
{
const struct intc_handle_int *_a = a;
const struct intc_handle_int *_b = b;
return _a->irq - _b->irq;
}
/* access.c */
extern unsigned long
(*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);
extern unsigned long
(*intc_enable_fns[])(unsigned long addr, unsigned long handle,
unsigned long (*fn)(unsigned long,
unsigned long, unsigned long),
unsigned int irq);
extern unsigned long
(*intc_disable_fns[])(unsigned long addr, unsigned long handle,
unsigned long (*fn)(unsigned long,
unsigned long, unsigned long),
unsigned int irq);
extern unsigned long
(*intc_enable_noprio_fns[])(unsigned long addr, unsigned long handle,
unsigned long (*fn)(unsigned long,
unsigned long, unsigned long),
unsigned int irq);
unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address);
unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address);
unsigned int intc_set_field_from_handle(unsigned int value,
unsigned int field_value,
unsigned int handle);
unsigned long intc_get_field_from_handle(unsigned int value,
unsigned int handle);
/* balancing.c */
#ifdef CONFIG_INTC_BALANCING
void intc_balancing_enable(unsigned int irq);
void intc_balancing_disable(unsigned int irq);
void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
struct intc_desc_int *d, intc_enum id);
#else
static inline void intc_balancing_enable(unsigned int irq) { }
static inline void intc_balancing_disable(unsigned int irq) { }
static inline void
intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
struct intc_desc_int *d, intc_enum id) { }
#endif
/* chip.c */
extern struct irq_chip intc_irq_chip;
void _intc_enable(struct irq_data *data, unsigned long handle);
/* core.c */
extern struct list_head intc_list;
extern raw_spinlock_t intc_big_lock;
extern struct bus_type intc_subsys;
unsigned int intc_get_dfl_prio_level(void);
unsigned int intc_get_prio_level(unsigned int irq);
void intc_set_prio_level(unsigned int irq, unsigned int level);
/* handle.c */
unsigned int intc_get_mask_handle(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id, int do_grps);
unsigned int intc_get_prio_handle(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id, int do_grps);
unsigned int intc_get_sense_handle(struct intc_desc *desc,
struct intc_desc_int *d,
intc_enum enum_id);
void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
struct intc_desc_int *d, intc_enum id);
unsigned long intc_get_ack_handle(unsigned int irq);
void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,
intc_enum enum_id, int enable);
/* irqdomain.c */
void intc_irq_domain_init(struct intc_desc_int *d, struct intc_hw_desc *hw);
/* virq.c */
void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);
void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);
struct intc_map_entry *intc_irq_xlate_get(unsigned int irq);
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