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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>
123 lines
5.7 KiB
C
123 lines
5.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* iommu.h: Definitions for the sun4m IOMMU.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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*/
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#ifndef _SPARC_IOMMU_H
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#define _SPARC_IOMMU_H
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#include <asm/page.h>
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#include <asm/bitext.h>
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/* The iommu handles all virtual to physical address translations
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* that occur between the SBUS and physical memory. Access by
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* the cpu to IO registers and similar go over the mbus so are
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* translated by the on chip SRMMU. The iommu and the srmmu do
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* not need to have the same translations at all, in fact most
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* of the time the translations they handle are a disjunct set.
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* Basically the iommu handles all dvma sbus activity.
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*/
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/* The IOMMU registers occupy three pages in IO space. */
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struct iommu_regs {
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/* First page */
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volatile unsigned long control; /* IOMMU control */
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volatile unsigned long base; /* Physical base of iopte page table */
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volatile unsigned long _unused1[3];
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volatile unsigned long tlbflush; /* write only */
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volatile unsigned long pageflush; /* write only */
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volatile unsigned long _unused2[1017];
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/* Second page */
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volatile unsigned long afsr; /* Async-fault status register */
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volatile unsigned long afar; /* Async-fault physical address */
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volatile unsigned long _unused3[2];
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volatile unsigned long sbuscfg0; /* SBUS configuration registers, per-slot */
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volatile unsigned long sbuscfg1;
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volatile unsigned long sbuscfg2;
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volatile unsigned long sbuscfg3;
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volatile unsigned long mfsr; /* Memory-fault status register */
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volatile unsigned long mfar; /* Memory-fault physical address */
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volatile unsigned long _unused4[1014];
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/* Third page */
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volatile unsigned long mid; /* IOMMU module-id */
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};
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#define IOMMU_CTRL_IMPL 0xf0000000 /* Implementation */
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#define IOMMU_CTRL_VERS 0x0f000000 /* Version */
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#define IOMMU_CTRL_RNGE 0x0000001c /* Mapping RANGE */
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#define IOMMU_RNGE_16MB 0x00000000 /* 0xff000000 -> 0xffffffff */
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#define IOMMU_RNGE_32MB 0x00000004 /* 0xfe000000 -> 0xffffffff */
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#define IOMMU_RNGE_64MB 0x00000008 /* 0xfc000000 -> 0xffffffff */
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#define IOMMU_RNGE_128MB 0x0000000c /* 0xf8000000 -> 0xffffffff */
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#define IOMMU_RNGE_256MB 0x00000010 /* 0xf0000000 -> 0xffffffff */
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#define IOMMU_RNGE_512MB 0x00000014 /* 0xe0000000 -> 0xffffffff */
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#define IOMMU_RNGE_1GB 0x00000018 /* 0xc0000000 -> 0xffffffff */
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#define IOMMU_RNGE_2GB 0x0000001c /* 0x80000000 -> 0xffffffff */
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#define IOMMU_CTRL_ENAB 0x00000001 /* IOMMU Enable */
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#define IOMMU_AFSR_ERR 0x80000000 /* LE, TO, or BE asserted */
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#define IOMMU_AFSR_LE 0x40000000 /* SBUS reports error after transaction */
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#define IOMMU_AFSR_TO 0x20000000 /* Write access took more than 12.8 us. */
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#define IOMMU_AFSR_BE 0x10000000 /* Write access received error acknowledge */
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#define IOMMU_AFSR_SIZE 0x0e000000 /* Size of transaction causing error */
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#define IOMMU_AFSR_S 0x01000000 /* Sparc was in supervisor mode */
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#define IOMMU_AFSR_RESV 0x00f00000 /* Reserver, forced to 0x8 by hardware */
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#define IOMMU_AFSR_ME 0x00080000 /* Multiple errors occurred */
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#define IOMMU_AFSR_RD 0x00040000 /* A read operation was in progress */
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#define IOMMU_AFSR_FAV 0x00020000 /* IOMMU afar has valid contents */
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#define IOMMU_SBCFG_SAB30 0x00010000 /* Phys-address bit 30 when bypass enabled */
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#define IOMMU_SBCFG_BA16 0x00000004 /* Slave supports 16 byte bursts */
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#define IOMMU_SBCFG_BA8 0x00000002 /* Slave supports 8 byte bursts */
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#define IOMMU_SBCFG_BYPASS 0x00000001 /* Bypass IOMMU, treat all addresses
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produced by this device as pure
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physical. */
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#define IOMMU_MFSR_ERR 0x80000000 /* One or more of PERR1 or PERR0 */
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#define IOMMU_MFSR_S 0x01000000 /* Sparc was in supervisor mode */
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#define IOMMU_MFSR_CPU 0x00800000 /* CPU transaction caused parity error */
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#define IOMMU_MFSR_ME 0x00080000 /* Multiple parity errors occurred */
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#define IOMMU_MFSR_PERR 0x00006000 /* high bit indicates parity error occurred
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on the even word of the access, low bit
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indicated odd word caused the parity error */
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#define IOMMU_MFSR_BM 0x00001000 /* Error occurred while in boot mode */
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#define IOMMU_MFSR_C 0x00000800 /* Address causing error was marked cacheable */
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#define IOMMU_MFSR_RTYP 0x000000f0 /* Memory request transaction type */
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#define IOMMU_MID_SBAE 0x001f0000 /* SBus arbitration enable */
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#define IOMMU_MID_SE 0x00100000 /* Enables SCSI/ETHERNET arbitration */
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#define IOMMU_MID_SB3 0x00080000 /* Enable SBUS device 3 arbitration */
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#define IOMMU_MID_SB2 0x00040000 /* Enable SBUS device 2 arbitration */
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#define IOMMU_MID_SB1 0x00020000 /* Enable SBUS device 1 arbitration */
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#define IOMMU_MID_SB0 0x00010000 /* Enable SBUS device 0 arbitration */
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#define IOMMU_MID_MID 0x0000000f /* Module-id, hardcoded to 0x8 */
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/* The format of an iopte in the page tables */
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#define IOPTE_PAGE 0x07ffff00 /* Physical page number (PA[30:12]) */
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#define IOPTE_CACHE 0x00000080 /* Cached (in vme IOCACHE or Viking/MXCC) */
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#define IOPTE_WRITE 0x00000004 /* Writeable */
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#define IOPTE_VALID 0x00000002 /* IOPTE is valid */
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#define IOPTE_WAZ 0x00000001 /* Write as zeros */
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struct iommu_struct {
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struct iommu_regs __iomem *regs;
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iopte_t *page_table;
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/* For convenience */
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unsigned long start; /* First managed virtual address */
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unsigned long end; /* Last managed virtual address */
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struct bit_map usemap;
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};
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static inline void iommu_invalidate(struct iommu_regs __iomem *regs)
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{
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sbus_writel(0, ®s->tlbflush);
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}
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static inline void iommu_invalidate_page(struct iommu_regs __iomem *regs, unsigned long ba)
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{
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sbus_writel(ba & PAGE_MASK, ®s->pageflush);
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}
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#endif /* !(_SPARC_IOMMU_H) */
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