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>
128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* mesh.h: definitions for the driver for the MESH SCSI bus adaptor
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* (Macintosh Enhanced SCSI Hardware) found on Power Macintosh computers.
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*
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* Copyright (C) 1996 Paul Mackerras.
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*/
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#ifndef _MESH_H
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#define _MESH_H
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/*
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* Registers in the MESH controller.
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*/
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struct mesh_regs {
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unsigned char count_lo;
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char pad0[15];
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unsigned char count_hi;
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char pad1[15];
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unsigned char fifo;
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char pad2[15];
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unsigned char sequence;
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char pad3[15];
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unsigned char bus_status0;
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char pad4[15];
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unsigned char bus_status1;
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char pad5[15];
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unsigned char fifo_count;
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char pad6[15];
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unsigned char exception;
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char pad7[15];
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unsigned char error;
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char pad8[15];
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unsigned char intr_mask;
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char pad9[15];
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unsigned char interrupt;
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char pad10[15];
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unsigned char source_id;
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char pad11[15];
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unsigned char dest_id;
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char pad12[15];
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unsigned char sync_params;
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char pad13[15];
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unsigned char mesh_id;
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char pad14[15];
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unsigned char sel_timeout;
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char pad15[15];
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};
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/* Bits in the sequence register. */
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#define SEQ_DMA_MODE 0x80 /* use DMA for data transfer */
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#define SEQ_TARGET 0x40 /* put the controller into target mode */
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#define SEQ_ATN 0x20 /* assert ATN signal */
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#define SEQ_ACTIVE_NEG 0x10 /* use active negation on REQ/ACK */
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#define SEQ_CMD 0x0f /* command bits: */
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#define SEQ_ARBITRATE 1 /* get the bus */
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#define SEQ_SELECT 2 /* select a target */
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#define SEQ_COMMAND 3 /* send a command */
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#define SEQ_STATUS 4 /* receive status */
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#define SEQ_DATAOUT 5 /* send data */
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#define SEQ_DATAIN 6 /* receive data */
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#define SEQ_MSGOUT 7 /* send a message */
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#define SEQ_MSGIN 8 /* receive a message */
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#define SEQ_BUSFREE 9 /* look for bus free */
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#define SEQ_ENBPARITY 0x0a /* enable parity checking */
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#define SEQ_DISPARITY 0x0b /* disable parity checking */
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#define SEQ_ENBRESEL 0x0c /* enable reselection */
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#define SEQ_DISRESEL 0x0d /* disable reselection */
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#define SEQ_RESETMESH 0x0e /* reset the controller */
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#define SEQ_FLUSHFIFO 0x0f /* clear out the FIFO */
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/* Bits in the bus_status0 and bus_status1 registers:
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these correspond directly to the SCSI bus control signals. */
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#define BS0_REQ 0x20
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#define BS0_ACK 0x10
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#define BS0_ATN 0x08
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#define BS0_MSG 0x04
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#define BS0_CD 0x02
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#define BS0_IO 0x01
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#define BS1_RST 0x80
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#define BS1_BSY 0x40
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#define BS1_SEL 0x20
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/* Bus phases defined by the bits in bus_status0 */
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#define BS0_PHASE (BS0_MSG+BS0_CD+BS0_IO)
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#define BP_DATAOUT 0
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#define BP_DATAIN BS0_IO
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#define BP_COMMAND BS0_CD
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#define BP_STATUS (BS0_CD+BS0_IO)
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#define BP_MSGOUT (BS0_MSG+BS0_CD)
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#define BP_MSGIN (BS0_MSG+BS0_CD+BS0_IO)
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/* Bits in the exception register. */
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#define EXC_SELWATN 0x20 /* (as target) we were selected with ATN */
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#define EXC_SELECTED 0x10 /* (as target) we were selected w/o ATN */
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#define EXC_RESELECTED 0x08 /* (as initiator) we were reselected */
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#define EXC_ARBLOST 0x04 /* we lost arbitration */
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#define EXC_PHASEMM 0x02 /* SCSI phase mismatch */
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#define EXC_SELTO 0x01 /* selection timeout */
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/* Bits in the error register */
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#define ERR_UNEXPDISC 0x40 /* target unexpectedly disconnected */
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#define ERR_SCSIRESET 0x20 /* SCSI bus got reset on us */
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#define ERR_SEQERR 0x10 /* we did something the chip didn't like */
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#define ERR_PARITY 0x01 /* parity error was detected */
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/* Bits in the interrupt and intr_mask registers */
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#define INT_ERROR 0x04 /* error interrupt */
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#define INT_EXCEPTION 0x02 /* exception interrupt */
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#define INT_CMDDONE 0x01 /* command done interrupt */
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/* Fields in the sync_params register */
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#define SYNC_OFF(x) ((x) >> 4) /* offset field */
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#define SYNC_PER(x) ((x) & 0xf) /* period field */
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#define SYNC_PARAMS(o, p) (((o) << 4) | (p))
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#define ASYNC_PARAMS 2 /* sync_params value for async xfers */
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/*
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* Assuming a clock frequency of 50MHz:
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*
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* The transfer period with SYNC_PER(sync_params) == x
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* is (x + 2) * 40ns, except that x == 0 gives 100ns.
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*
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* The units of the sel_timeout register are 10ms.
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*/
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#endif /* _MESH_H */
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