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>
153 lines
4.8 KiB
C
153 lines
4.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* n2rng.h: Niagara2 RNG defines.
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*
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* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
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*/
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#ifndef _N2RNG_H
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#define _N2RNG_H
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/* ver1 devices - n2-rng, vf-rng, kt-rng */
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#define RNG_v1_CTL_WAIT 0x0000000001fffe00ULL /* Minimum wait time */
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#define RNG_v1_CTL_WAIT_SHIFT 9
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#define RNG_v1_CTL_BYPASS 0x0000000000000100ULL /* VCO voltage source */
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#define RNG_v1_CTL_VCO 0x00000000000000c0ULL /* VCO rate control */
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#define RNG_v1_CTL_VCO_SHIFT 6
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#define RNG_v1_CTL_ASEL 0x0000000000000030ULL /* Analog MUX select */
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#define RNG_v1_CTL_ASEL_SHIFT 4
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#define RNG_v1_CTL_ASEL_NOOUT 2
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/* these are the same in v2 as in v1 */
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#define RNG_CTL_LFSR 0x0000000000000008ULL /* Use LFSR or plain shift */
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#define RNG_CTL_ES3 0x0000000000000004ULL /* Enable entropy source 3 */
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#define RNG_CTL_ES2 0x0000000000000002ULL /* Enable entropy source 2 */
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#define RNG_CTL_ES1 0x0000000000000001ULL /* Enable entropy source 1 */
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/* ver2 devices - m4-rng, m7-rng */
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#define RNG_v2_CTL_WAIT 0x0000000007fff800ULL /* Minimum wait time */
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#define RNG_v2_CTL_WAIT_SHIFT 12
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#define RNG_v2_CTL_BYPASS 0x0000000000000400ULL /* VCO voltage source */
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#define RNG_v2_CTL_VCO 0x0000000000000300ULL /* VCO rate control */
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#define RNG_v2_CTL_VCO_SHIFT 9
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#define RNG_v2_CTL_PERF 0x0000000000000180ULL /* Perf */
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#define RNG_v2_CTL_ASEL 0x0000000000000070ULL /* Analog MUX select */
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#define RNG_v2_CTL_ASEL_SHIFT 4
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#define RNG_v2_CTL_ASEL_NOOUT 7
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#define HV_FAST_RNG_GET_DIAG_CTL 0x130
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#define HV_FAST_RNG_CTL_READ 0x131
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#define HV_FAST_RNG_CTL_WRITE 0x132
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#define HV_FAST_RNG_DATA_READ_DIAG 0x133
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#define HV_FAST_RNG_DATA_READ 0x134
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#define HV_RNG_STATE_UNCONFIGURED 0
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#define HV_RNG_STATE_CONFIGURED 1
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#define HV_RNG_STATE_HEALTHCHECK 2
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#define HV_RNG_STATE_ERROR 3
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#define HV_RNG_NUM_CONTROL 4
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#ifndef __ASSEMBLY__
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extern unsigned long sun4v_rng_get_diag_ctl(void);
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extern unsigned long sun4v_rng_ctl_read_v1(unsigned long ctl_regs_ra,
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unsigned long *state,
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unsigned long *tick_delta);
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extern unsigned long sun4v_rng_ctl_read_v2(unsigned long ctl_regs_ra,
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unsigned long unit,
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unsigned long *state,
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unsigned long *tick_delta,
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unsigned long *watchdog,
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unsigned long *write_status);
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extern unsigned long sun4v_rng_ctl_write_v1(unsigned long ctl_regs_ra,
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unsigned long state,
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unsigned long write_timeout,
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unsigned long *tick_delta);
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extern unsigned long sun4v_rng_ctl_write_v2(unsigned long ctl_regs_ra,
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unsigned long state,
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unsigned long write_timeout,
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unsigned long unit);
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extern unsigned long sun4v_rng_data_read_diag_v1(unsigned long data_ra,
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unsigned long len,
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unsigned long *tick_delta);
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extern unsigned long sun4v_rng_data_read_diag_v2(unsigned long data_ra,
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unsigned long len,
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unsigned long unit,
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unsigned long *tick_delta);
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extern unsigned long sun4v_rng_data_read(unsigned long data_ra,
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unsigned long *tick_delta);
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enum n2rng_compat_id {
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N2_n2_rng,
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N2_vf_rng,
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N2_kt_rng,
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N2_m4_rng,
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N2_m7_rng,
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};
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struct n2rng_template {
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enum n2rng_compat_id id;
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int multi_capable;
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int chip_version;
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};
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struct n2rng_unit {
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u64 control[HV_RNG_NUM_CONTROL];
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};
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struct n2rng {
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struct platform_device *op;
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unsigned long flags;
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#define N2RNG_FLAG_MULTI 0x00000001 /* Multi-unit capable RNG */
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#define N2RNG_FLAG_CONTROL 0x00000002 /* Operating in control domain */
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#define N2RNG_FLAG_READY 0x00000008 /* Ready for hw-rng layer */
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#define N2RNG_FLAG_SHUTDOWN 0x00000010 /* Driver unregistering */
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#define N2RNG_FLAG_BUFFER_VALID 0x00000020 /* u32 buffer holds valid data */
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struct n2rng_template *data;
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int num_units;
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struct n2rng_unit *units;
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struct hwrng hwrng;
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u32 buffer;
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/* Registered hypervisor group API major and minor version. */
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unsigned long hvapi_major;
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unsigned long hvapi_minor;
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struct delayed_work work;
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unsigned long hv_state; /* HV_RNG_STATE_foo */
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unsigned long health_check_sec;
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unsigned long accum_cycles;
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unsigned long wd_timeo;
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#define N2RNG_HEALTH_CHECK_SEC_DEFAULT 0
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#define N2RNG_ACCUM_CYCLES_DEFAULT 2048
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#define N2RNG_WD_TIMEO_DEFAULT 0
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u64 scratch_control[HV_RNG_NUM_CONTROL];
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#define RNG_v1_SELFTEST_TICKS 38859
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#define RNG_v1_SELFTEST_VAL ((u64)0xB8820C7BD387E32C)
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#define RNG_v2_SELFTEST_TICKS 64
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#define RNG_v2_SELFTEST_VAL ((u64)0xffffffffffffffff)
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#define SELFTEST_POLY ((u64)0x231DCEE91262B8A3)
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#define SELFTEST_MATCH_GOAL 6
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#define SELFTEST_LOOPS_MAX 40000
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#define SELFTEST_BUFFER_WORDS 8
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u64 test_data;
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u64 test_control[HV_RNG_NUM_CONTROL];
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u64 test_buffer[SELFTEST_BUFFER_WORDS];
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};
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#define N2RNG_BLOCK_LIMIT 60000
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#define N2RNG_BUSY_LIMIT 100
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#define N2RNG_HCHECK_LIMIT 100
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#endif /* !(__ASSEMBLY__) */
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#endif /* _N2RNG_H */
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