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>
242 lines
8.2 KiB
C
242 lines
8.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_PM_QOS_H
|
|
#define _LINUX_PM_QOS_H
|
|
/* interface for the pm_qos_power infrastructure of the linux kernel.
|
|
*
|
|
* Mark Gross <mgross@linux.intel.com>
|
|
*/
|
|
#include <linux/plist.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/device.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
enum {
|
|
PM_QOS_RESERVED = 0,
|
|
PM_QOS_CPU_DMA_LATENCY,
|
|
PM_QOS_NETWORK_LATENCY,
|
|
PM_QOS_NETWORK_THROUGHPUT,
|
|
PM_QOS_MEMORY_BANDWIDTH,
|
|
|
|
/* insert new class ID */
|
|
PM_QOS_NUM_CLASSES,
|
|
};
|
|
|
|
enum pm_qos_flags_status {
|
|
PM_QOS_FLAGS_UNDEFINED = -1,
|
|
PM_QOS_FLAGS_NONE,
|
|
PM_QOS_FLAGS_SOME,
|
|
PM_QOS_FLAGS_ALL,
|
|
};
|
|
|
|
#define PM_QOS_DEFAULT_VALUE -1
|
|
|
|
#define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
|
|
#define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
|
|
#define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0
|
|
#define PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE 0
|
|
#define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE 0
|
|
#define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE 0
|
|
#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1)
|
|
#define PM_QOS_LATENCY_ANY ((s32)(~(__u32)0 >> 1))
|
|
|
|
#define PM_QOS_FLAG_NO_POWER_OFF (1 << 0)
|
|
#define PM_QOS_FLAG_REMOTE_WAKEUP (1 << 1)
|
|
|
|
struct pm_qos_request {
|
|
struct plist_node node;
|
|
int pm_qos_class;
|
|
struct delayed_work work; /* for pm_qos_update_request_timeout */
|
|
};
|
|
|
|
struct pm_qos_flags_request {
|
|
struct list_head node;
|
|
s32 flags; /* Do not change to 64 bit */
|
|
};
|
|
|
|
enum dev_pm_qos_req_type {
|
|
DEV_PM_QOS_RESUME_LATENCY = 1,
|
|
DEV_PM_QOS_LATENCY_TOLERANCE,
|
|
DEV_PM_QOS_FLAGS,
|
|
};
|
|
|
|
struct dev_pm_qos_request {
|
|
enum dev_pm_qos_req_type type;
|
|
union {
|
|
struct plist_node pnode;
|
|
struct pm_qos_flags_request flr;
|
|
} data;
|
|
struct device *dev;
|
|
};
|
|
|
|
enum pm_qos_type {
|
|
PM_QOS_UNITIALIZED,
|
|
PM_QOS_MAX, /* return the largest value */
|
|
PM_QOS_MIN, /* return the smallest value */
|
|
PM_QOS_SUM /* return the sum */
|
|
};
|
|
|
|
/*
|
|
* Note: The lockless read path depends on the CPU accessing target_value
|
|
* or effective_flags atomically. Atomic access is only guaranteed on all CPU
|
|
* types linux supports for 32 bit quantites
|
|
*/
|
|
struct pm_qos_constraints {
|
|
struct plist_head list;
|
|
s32 target_value; /* Do not change to 64 bit */
|
|
s32 default_value;
|
|
s32 no_constraint_value;
|
|
enum pm_qos_type type;
|
|
struct blocking_notifier_head *notifiers;
|
|
};
|
|
|
|
struct pm_qos_flags {
|
|
struct list_head list;
|
|
s32 effective_flags; /* Do not change to 64 bit */
|
|
};
|
|
|
|
struct dev_pm_qos {
|
|
struct pm_qos_constraints resume_latency;
|
|
struct pm_qos_constraints latency_tolerance;
|
|
struct pm_qos_flags flags;
|
|
struct dev_pm_qos_request *resume_latency_req;
|
|
struct dev_pm_qos_request *latency_tolerance_req;
|
|
struct dev_pm_qos_request *flags_req;
|
|
};
|
|
|
|
/* Action requested to pm_qos_update_target */
|
|
enum pm_qos_req_action {
|
|
PM_QOS_ADD_REQ, /* Add a new request */
|
|
PM_QOS_UPDATE_REQ, /* Update an existing request */
|
|
PM_QOS_REMOVE_REQ /* Remove an existing request */
|
|
};
|
|
|
|
static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req)
|
|
{
|
|
return req->dev != NULL;
|
|
}
|
|
|
|
int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
|
|
enum pm_qos_req_action action, int value);
|
|
bool pm_qos_update_flags(struct pm_qos_flags *pqf,
|
|
struct pm_qos_flags_request *req,
|
|
enum pm_qos_req_action action, s32 val);
|
|
void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
|
|
s32 value);
|
|
void pm_qos_update_request(struct pm_qos_request *req,
|
|
s32 new_value);
|
|
void pm_qos_update_request_timeout(struct pm_qos_request *req,
|
|
s32 new_value, unsigned long timeout_us);
|
|
void pm_qos_remove_request(struct pm_qos_request *req);
|
|
|
|
int pm_qos_request(int pm_qos_class);
|
|
int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier);
|
|
int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
|
|
int pm_qos_request_active(struct pm_qos_request *req);
|
|
s32 pm_qos_read_value(struct pm_qos_constraints *c);
|
|
|
|
#ifdef CONFIG_PM
|
|
enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask);
|
|
enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask);
|
|
s32 __dev_pm_qos_read_value(struct device *dev);
|
|
s32 dev_pm_qos_read_value(struct device *dev);
|
|
int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
|
|
enum dev_pm_qos_req_type type, s32 value);
|
|
int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value);
|
|
int dev_pm_qos_remove_request(struct dev_pm_qos_request *req);
|
|
int dev_pm_qos_add_notifier(struct device *dev,
|
|
struct notifier_block *notifier);
|
|
int dev_pm_qos_remove_notifier(struct device *dev,
|
|
struct notifier_block *notifier);
|
|
void dev_pm_qos_constraints_init(struct device *dev);
|
|
void dev_pm_qos_constraints_destroy(struct device *dev);
|
|
int dev_pm_qos_add_ancestor_request(struct device *dev,
|
|
struct dev_pm_qos_request *req,
|
|
enum dev_pm_qos_req_type type, s32 value);
|
|
int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value);
|
|
void dev_pm_qos_hide_latency_limit(struct device *dev);
|
|
int dev_pm_qos_expose_flags(struct device *dev, s32 value);
|
|
void dev_pm_qos_hide_flags(struct device *dev);
|
|
int dev_pm_qos_update_flags(struct device *dev, s32 mask, bool set);
|
|
s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev);
|
|
int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val);
|
|
int dev_pm_qos_expose_latency_tolerance(struct device *dev);
|
|
void dev_pm_qos_hide_latency_tolerance(struct device *dev);
|
|
|
|
static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev)
|
|
{
|
|
return dev->power.qos->resume_latency_req->data.pnode.prio;
|
|
}
|
|
|
|
static inline s32 dev_pm_qos_requested_flags(struct device *dev)
|
|
{
|
|
return dev->power.qos->flags_req->data.flr.flags;
|
|
}
|
|
|
|
static inline s32 dev_pm_qos_raw_read_value(struct device *dev)
|
|
{
|
|
return IS_ERR_OR_NULL(dev->power.qos) ?
|
|
0 : pm_qos_read_value(&dev->power.qos->resume_latency);
|
|
}
|
|
#else
|
|
static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev,
|
|
s32 mask)
|
|
{ return PM_QOS_FLAGS_UNDEFINED; }
|
|
static inline enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev,
|
|
s32 mask)
|
|
{ return PM_QOS_FLAGS_UNDEFINED; }
|
|
static inline s32 __dev_pm_qos_read_value(struct device *dev)
|
|
{ return 0; }
|
|
static inline s32 dev_pm_qos_read_value(struct device *dev)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_add_request(struct device *dev,
|
|
struct dev_pm_qos_request *req,
|
|
enum dev_pm_qos_req_type type,
|
|
s32 value)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
|
|
s32 new_value)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_add_notifier(struct device *dev,
|
|
struct notifier_block *notifier)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_remove_notifier(struct device *dev,
|
|
struct notifier_block *notifier)
|
|
{ return 0; }
|
|
static inline void dev_pm_qos_constraints_init(struct device *dev)
|
|
{
|
|
dev->power.power_state = PMSG_ON;
|
|
}
|
|
static inline void dev_pm_qos_constraints_destroy(struct device *dev)
|
|
{
|
|
dev->power.power_state = PMSG_INVALID;
|
|
}
|
|
static inline int dev_pm_qos_add_ancestor_request(struct device *dev,
|
|
struct dev_pm_qos_request *req,
|
|
enum dev_pm_qos_req_type type,
|
|
s32 value)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value)
|
|
{ return 0; }
|
|
static inline void dev_pm_qos_hide_latency_limit(struct device *dev) {}
|
|
static inline int dev_pm_qos_expose_flags(struct device *dev, s32 value)
|
|
{ return 0; }
|
|
static inline void dev_pm_qos_hide_flags(struct device *dev) {}
|
|
static inline int dev_pm_qos_update_flags(struct device *dev, s32 m, bool set)
|
|
{ return 0; }
|
|
static inline s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev)
|
|
{ return PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; }
|
|
static inline int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_expose_latency_tolerance(struct device *dev)
|
|
{ return 0; }
|
|
static inline void dev_pm_qos_hide_latency_tolerance(struct device *dev) {}
|
|
|
|
static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev) { return 0; }
|
|
static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; }
|
|
static inline s32 dev_pm_qos_raw_read_value(struct device *dev) { return 0; }
|
|
#endif
|
|
|
|
#endif
|