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linux_dsm_epyc7002/include/scsi/scsi_transport_sas.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 */
#ifndef SCSI_TRANSPORT_SAS_H
#define SCSI_TRANSPORT_SAS_H
#include <linux/transport_class.h>
#include <linux/types.h>
#include <linux/mutex.h>
#include <scsi/sas.h>
#include <linux/bsg-lib.h>
struct scsi_transport_template;
struct sas_rphy;
struct request;
#if !IS_ENABLED(CONFIG_SCSI_SAS_ATTRS)
static inline int scsi_is_sas_rphy(const struct device *sdev)
{
return 0;
}
#else
extern int scsi_is_sas_rphy(const struct device *);
#endif
static inline int sas_protocol_ata(enum sas_protocol proto)
{
return ((proto & SAS_PROTOCOL_SATA) ||
(proto & SAS_PROTOCOL_STP))? 1 : 0;
}
enum sas_linkrate {
/* These Values are defined in the SAS standard */
SAS_LINK_RATE_UNKNOWN = 0,
SAS_PHY_DISABLED = 1,
SAS_PHY_RESET_PROBLEM = 2,
SAS_SATA_SPINUP_HOLD = 3,
SAS_SATA_PORT_SELECTOR = 4,
SAS_PHY_RESET_IN_PROGRESS = 5,
SAS_LINK_RATE_1_5_GBPS = 8,
SAS_LINK_RATE_G1 = SAS_LINK_RATE_1_5_GBPS,
SAS_LINK_RATE_3_0_GBPS = 9,
SAS_LINK_RATE_G2 = SAS_LINK_RATE_3_0_GBPS,
SAS_LINK_RATE_6_0_GBPS = 10,
SAS_LINK_RATE_12_0_GBPS = 11,
/* These are virtual to the transport class and may never
* be signalled normally since the standard defined field
* is only 4 bits */
SAS_LINK_RATE_FAILED = 0x10,
SAS_PHY_VIRTUAL = 0x11,
};
struct sas_identify {
enum sas_device_type device_type;
enum sas_protocol initiator_port_protocols;
enum sas_protocol target_port_protocols;
u64 sas_address;
u8 phy_identifier;
};
struct sas_phy {
struct device dev;
int number;
int enabled;
/* phy identification */
struct sas_identify identify;
/* phy attributes */
enum sas_linkrate negotiated_linkrate;
enum sas_linkrate minimum_linkrate_hw;
enum sas_linkrate minimum_linkrate;
enum sas_linkrate maximum_linkrate_hw;
enum sas_linkrate maximum_linkrate;
/* link error statistics */
u32 invalid_dword_count;
u32 running_disparity_error_count;
u32 loss_of_dword_sync_count;
u32 phy_reset_problem_count;
/* for the list of phys belonging to a port */
struct list_head port_siblings;
/* available to the lldd */
void *hostdata;
};
#define dev_to_phy(d) \
container_of((d), struct sas_phy, dev)
#define transport_class_to_phy(dev) \
dev_to_phy((dev)->parent)
#define phy_to_shost(phy) \
dev_to_shost((phy)->dev.parent)
struct request_queue;
struct sas_rphy {
struct device dev;
struct sas_identify identify;
struct list_head list;
struct request_queue *q;
u32 scsi_target_id;
};
#define dev_to_rphy(d) \
container_of((d), struct sas_rphy, dev)
#define transport_class_to_rphy(dev) \
dev_to_rphy((dev)->parent)
#define rphy_to_shost(rphy) \
dev_to_shost((rphy)->dev.parent)
#define target_to_rphy(targ) \
dev_to_rphy((targ)->dev.parent)
struct sas_end_device {
struct sas_rphy rphy;
/* flags */
unsigned ready_led_meaning:1;
unsigned tlr_supported:1;
unsigned tlr_enabled:1;
/* parameters */
u16 I_T_nexus_loss_timeout;
u16 initiator_response_timeout;
};
#define rphy_to_end_device(r) \
container_of((r), struct sas_end_device, rphy)
struct sas_expander_device {
int level;
int next_port_id;
#define SAS_EXPANDER_VENDOR_ID_LEN 8
char vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1];
#define SAS_EXPANDER_PRODUCT_ID_LEN 16
char product_id[SAS_EXPANDER_PRODUCT_ID_LEN+1];
#define SAS_EXPANDER_PRODUCT_REV_LEN 4
char product_rev[SAS_EXPANDER_PRODUCT_REV_LEN+1];
#define SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN 8
char component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN+1];
u16 component_id;
u8 component_revision_id;
struct sas_rphy rphy;
};
#define rphy_to_expander_device(r) \
container_of((r), struct sas_expander_device, rphy)
struct sas_port {
struct device dev;
int port_identifier;
int num_phys;
/* port flags */
unsigned int is_backlink:1;
/* the other end of the link */
struct sas_rphy *rphy;
struct mutex phy_list_mutex;
struct list_head phy_list;
};
#define dev_to_sas_port(d) \
container_of((d), struct sas_port, dev)
#define transport_class_to_sas_port(dev) \
dev_to_sas_port((dev)->parent)
struct sas_phy_linkrates {
enum sas_linkrate maximum_linkrate;
enum sas_linkrate minimum_linkrate;
};
/* The functions by which the transport class and the driver communicate */
struct sas_function_template {
int (*get_linkerrors)(struct sas_phy *);
int (*get_enclosure_identifier)(struct sas_rphy *, u64 *);
int (*get_bay_identifier)(struct sas_rphy *);
int (*phy_reset)(struct sas_phy *, int);
int (*phy_enable)(struct sas_phy *, int);
int (*phy_setup)(struct sas_phy *);
void (*phy_release)(struct sas_phy *);
int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *);
void (*smp_handler)(struct bsg_job *, struct Scsi_Host *,
struct sas_rphy *);
};
void sas_remove_children(struct device *);
extern void sas_remove_host(struct Scsi_Host *);
extern struct sas_phy *sas_phy_alloc(struct device *, int);
extern void sas_phy_free(struct sas_phy *);
extern int sas_phy_add(struct sas_phy *);
extern void sas_phy_delete(struct sas_phy *);
extern int scsi_is_sas_phy(const struct device *);
u64 sas_get_address(struct scsi_device *);
unsigned int sas_tlr_supported(struct scsi_device *);
unsigned int sas_is_tlr_enabled(struct scsi_device *);
void sas_disable_tlr(struct scsi_device *);
void sas_enable_tlr(struct scsi_device *);
extern struct sas_rphy *sas_end_device_alloc(struct sas_port *);
extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type);
void sas_rphy_free(struct sas_rphy *);
extern int sas_rphy_add(struct sas_rphy *);
extern void sas_rphy_remove(struct sas_rphy *);
extern void sas_rphy_delete(struct sas_rphy *);
extern void sas_rphy_unlink(struct sas_rphy *);
struct sas_port *sas_port_alloc(struct device *, int);
struct sas_port *sas_port_alloc_num(struct device *);
int sas_port_add(struct sas_port *);
void sas_port_free(struct sas_port *);
void sas_port_delete(struct sas_port *);
void sas_port_add_phy(struct sas_port *, struct sas_phy *);
void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
void sas_port_mark_backlink(struct sas_port *);
int scsi_is_sas_port(const struct device *);
struct sas_phy *sas_port_get_phy(struct sas_port *port);
static inline void sas_port_put_phy(struct sas_phy *phy)
{
if (phy)
put_device(&phy->dev);
}
extern struct scsi_transport_template *
sas_attach_transport(struct sas_function_template *);
extern void sas_release_transport(struct scsi_transport_template *);
int sas_read_port_mode_page(struct scsi_device *);
static inline int
scsi_is_sas_expander_device(struct device *dev)
{
struct sas_rphy *rphy;
if (!scsi_is_sas_rphy(dev))
return 0;
rphy = dev_to_rphy(dev);
return rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE ||
rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE;
}
#define scsi_is_sas_phy_local(phy) scsi_is_host_device((phy)->dev.parent)
#endif /* SCSI_TRANSPORT_SAS_H */
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