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linux/drivers/s390/char/tape_std.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 */
/*
* standard tape device functions for ibm tapes.
*
* Copyright IBM Corp. 2001, 2006
* Author(s): Carsten Otte <cotte@de.ibm.com>
* Tuan Ngo-Anh <ngoanh@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef _TAPE_STD_H
#define _TAPE_STD_H
#include <asm/tape390.h>
/*
* Biggest block size to handle. Currently 64K because we only build
* channel programs without data chaining.
*/
#define MAX_BLOCKSIZE 65535
/*
* The CCW commands for the Tape type of command.
*/
#define INVALID_00 0x00 /* Invalid cmd */
#define BACKSPACEBLOCK 0x27 /* Back Space block */
#define BACKSPACEFILE 0x2f /* Back Space file */
#define DATA_SEC_ERASE 0x97 /* Data security erase */
#define ERASE_GAP 0x17 /* Erase Gap */
#define FORSPACEBLOCK 0x37 /* Forward space block */
#define FORSPACEFILE 0x3F /* Forward Space file */
#define FORCE_STREAM_CNT 0xEB /* Forced streaming count # */
#define NOP 0x03 /* No operation */
#define READ_FORWARD 0x02 /* Read forward */
#define REWIND 0x07 /* Rewind */
#define REWIND_UNLOAD 0x0F /* Rewind and Unload */
#define SENSE 0x04 /* Sense */
#define NEW_MODE_SET 0xEB /* Guess it is Mode set */
#define WRITE_CMD 0x01 /* Write */
#define WRITETAPEMARK 0x1F /* Write Tape Mark */
#define ASSIGN 0xB7 /* 3420 REJECT,3480 OK */
#define CONTROL_ACCESS 0xE3 /* Set high speed */
#define DIAG_MODE_SET 0x0B /* 3420 NOP, 3480 REJECT */
#define LOAD_DISPLAY 0x9F /* 3420 REJECT,3480 OK */
#define LOCATE 0x4F /* 3420 REJ, 3480 NOP */
#define LOOP_WRITE_TO_READ 0x8B /* 3480 REJECT */
#define MODE_SET_DB 0xDB /* 3420 REJECT,3480 OK */
#define MODE_SET_C3 0xC3 /* for 3420 */
#define MODE_SET_CB 0xCB /* for 3420 */
#define MODE_SET_D3 0xD3 /* for 3420 */
#define READ_BACKWARD 0x0C /* */
#define READ_BLOCK_ID 0x22 /* 3420 REJECT,3480 OK */
#define READ_BUFFER 0x12 /* 3420 REJECT,3480 OK */
#define READ_BUFF_LOG 0x24 /* 3420 REJECT,3480 OK */
#define RELEASE 0xD4 /* 3420 NOP, 3480 REJECT */
#define REQ_TRK_IN_ERROR 0x1B /* 3420 NOP, 3480 REJECT */
#define RESERVE 0xF4 /* 3420 NOP, 3480 REJECT */
#define SENSE_GROUP_ID 0x34 /* 3420 REJECT,3480 OK */
#define SENSE_ID 0xE4 /* 3420 REJECT,3480 OK */
#define READ_DEV_CHAR 0x64 /* Read device characteristics */
#define SET_DIAGNOSE 0x4B /* 3420 NOP, 3480 REJECT */
#define SET_GROUP_ID 0xAF /* 3420 REJECT,3480 OK */
#define SET_TAPE_WRITE_IMMED 0xC3 /* for 3480 */
#define SUSPEND 0x5B /* 3420 REJ, 3480 NOP */
#define SYNC 0x43 /* Synchronize (flush buffer) */
#define UNASSIGN 0xC7 /* 3420 REJECT,3480 OK */
#define PERF_SUBSYS_FUNC 0x77 /* 3490 CMD */
#define READ_CONFIG_DATA 0xFA /* 3490 CMD */
#define READ_MESSAGE_ID 0x4E /* 3490 CMD */
#define READ_SUBSYS_DATA 0x3E /* 3490 CMD */
#define SET_INTERFACE_ID 0x73 /* 3490 CMD */
#define SENSE_COMMAND_REJECT 0x80
#define SENSE_INTERVENTION_REQUIRED 0x40
#define SENSE_BUS_OUT_CHECK 0x20
#define SENSE_EQUIPMENT_CHECK 0x10
#define SENSE_DATA_CHECK 0x08
#define SENSE_OVERRUN 0x04
#define SENSE_DEFERRED_UNIT_CHECK 0x02
#define SENSE_ASSIGNED_ELSEWHERE 0x01
#define SENSE_LOCATE_FAILURE 0x80
#define SENSE_DRIVE_ONLINE 0x40
#define SENSE_RESERVED 0x20
#define SENSE_RECORD_SEQUENCE_ERR 0x10
#define SENSE_BEGINNING_OF_TAPE 0x08
#define SENSE_WRITE_MODE 0x04
#define SENSE_WRITE_PROTECT 0x02
#define SENSE_NOT_CAPABLE 0x01
#define SENSE_CHANNEL_ADAPTER_CODE 0xE0
#define SENSE_CHANNEL_ADAPTER_LOC 0x10
#define SENSE_REPORTING_CU 0x08
#define SENSE_AUTOMATIC_LOADER 0x04
#define SENSE_TAPE_SYNC_MODE 0x02
#define SENSE_TAPE_POSITIONING 0x01
/* discipline functions */
struct tape_request *tape_std_read_block(struct tape_device *, size_t);
void tape_std_read_backward(struct tape_device *device,
struct tape_request *request);
struct tape_request *tape_std_write_block(struct tape_device *, size_t);
void tape_std_check_locate(struct tape_device *, struct tape_request *);
/* Some non-mtop commands. */
int tape_std_assign(struct tape_device *);
int tape_std_unassign(struct tape_device *);
int tape_std_read_block_id(struct tape_device *device, __u64 *id);
int tape_std_display(struct tape_device *, struct display_struct *disp);
int tape_std_terminate_write(struct tape_device *);
/* Standard magnetic tape commands. */
int tape_std_mtbsf(struct tape_device *, int);
int tape_std_mtbsfm(struct tape_device *, int);
int tape_std_mtbsr(struct tape_device *, int);
int tape_std_mtcompression(struct tape_device *, int);
int tape_std_mteom(struct tape_device *, int);
int tape_std_mterase(struct tape_device *, int);
int tape_std_mtfsf(struct tape_device *, int);
int tape_std_mtfsfm(struct tape_device *, int);
int tape_std_mtfsr(struct tape_device *, int);
int tape_std_mtload(struct tape_device *, int);
int tape_std_mtnop(struct tape_device *, int);
int tape_std_mtoffl(struct tape_device *, int);
int tape_std_mtreset(struct tape_device *, int);
int tape_std_mtreten(struct tape_device *, int);
int tape_std_mtrew(struct tape_device *, int);
int tape_std_mtsetblk(struct tape_device *, int);
int tape_std_mtunload(struct tape_device *, int);
int tape_std_mtweof(struct tape_device *, int);
/* Event handlers */
void tape_std_default_handler(struct tape_device *);
void tape_std_unexpect_uchk_handler(struct tape_device *);
void tape_std_irq(struct tape_device *);
void tape_std_process_eov(struct tape_device *);
// the error recovery stuff:
void tape_std_error_recovery(struct tape_device *);
void tape_std_error_recovery_has_failed(struct tape_device *,int error_id);
void tape_std_error_recovery_succeded(struct tape_device *);
void tape_std_error_recovery_do_retry(struct tape_device *);
void tape_std_error_recovery_read_opposite(struct tape_device *);
void tape_std_error_recovery_HWBUG(struct tape_device *, int condno);
/* S390 tape types */
enum s390_tape_type {
tape_3480,
tape_3490,
tape_3590,
tape_3592,
};
#endif // _TAPE_STD_H
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