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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>
105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright 2002 Integrated Device Technology, Inc.
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* All rights reserved.
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*
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* DMA register definition.
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*
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* Author : ryan.holmQVist@idt.com
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* Date : 20011005
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*/
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#ifndef __ASM_RC32434_DMA_H
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#define __ASM_RC32434_DMA_H
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#include <asm/mach-rc32434/rb.h>
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#define DMA0_BASE_ADDR 0x18040000
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/*
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* DMA descriptor (in physical memory).
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*/
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struct dma_desc {
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u32 control; /* Control. use DMAD_* */
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u32 ca; /* Current Address. */
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u32 devcs; /* Device control and status. */
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u32 link; /* Next descriptor in chain. */
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};
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#define DMA_DESC_SIZ sizeof(struct dma_desc)
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#define DMA_DESC_COUNT_BIT 0
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#define DMA_DESC_COUNT_MSK 0x0003ffff
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#define DMA_DESC_DS_BIT 20
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#define DMA_DESC_DS_MSK 0x00300000
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#define DMA_DESC_DEV_CMD_BIT 22
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#define DMA_DESC_DEV_CMD_MSK 0x01c00000
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/* DMA command sizes */
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#define DMA_DESC_DEV_CMD_BYTE 0
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#define DMA_DESC_DEV_CMD_HLF_WD 1
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#define DMA_DESC_DEV_CMD_WORD 2
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#define DMA_DESC_DEV_CMD_2WORDS 3
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#define DMA_DESC_DEV_CMD_4WORDS 4
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#define DMA_DESC_DEV_CMD_6WORDS 5
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#define DMA_DESC_DEV_CMD_8WORDS 6
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#define DMA_DESC_DEV_CMD_16WORDS 7
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/* DMA descriptors interrupts */
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#define DMA_DESC_COF (1 << 25) /* Chain on finished */
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#define DMA_DESC_COD (1 << 26) /* Chain on done */
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#define DMA_DESC_IOF (1 << 27) /* Interrupt on finished */
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#define DMA_DESC_IOD (1 << 28) /* Interrupt on done */
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#define DMA_DESC_TERM (1 << 29) /* Terminated */
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#define DMA_DESC_DONE (1 << 30) /* Done */
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#define DMA_DESC_FINI (1 << 31) /* Finished */
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/*
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* DMA register (within Internal Register Map).
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*/
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struct dma_reg {
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u32 dmac; /* Control. */
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u32 dmas; /* Status. */
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u32 dmasm; /* Mask. */
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u32 dmadptr; /* Descriptor pointer. */
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u32 dmandptr; /* Next descriptor pointer. */
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};
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/* DMA channels specific registers */
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#define DMA_CHAN_RUN_BIT (1 << 0)
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#define DMA_CHAN_DONE_BIT (1 << 1)
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#define DMA_CHAN_MODE_BIT (1 << 2)
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#define DMA_CHAN_MODE_MSK 0x0000000c
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#define DMA_CHAN_MODE_AUTO 0
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#define DMA_CHAN_MODE_BURST 1
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#define DMA_CHAN_MODE_XFRT 2
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#define DMA_CHAN_MODE_RSVD 3
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#define DMA_CHAN_ACT_BIT (1 << 4)
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/* DMA status registers */
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#define DMA_STAT_FINI (1 << 0)
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#define DMA_STAT_DONE (1 << 1)
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#define DMA_STAT_CHAIN (1 << 2)
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#define DMA_STAT_ERR (1 << 3)
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#define DMA_STAT_HALT (1 << 4)
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/*
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* DMA channel definitions
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*/
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#define DMA_CHAN_ETH_RCV 0
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#define DMA_CHAN_ETH_XMT 1
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#define DMA_CHAN_MEM_TO_FIFO 2
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#define DMA_CHAN_FIFO_TO_MEM 3
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#define DMA_CHAN_PCI_TO_MEM 4
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#define DMA_CHAN_MEM_TO_PCI 5
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#define DMA_CHAN_COUNT 6
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struct dma_channel {
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struct dma_reg ch[DMA_CHAN_COUNT];
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};
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#endif /* __ASM_RC32434_DMA_H */
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