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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>
149 lines
4.4 KiB
C
149 lines
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _SPARC64_LDC_H
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#define _SPARC64_LDC_H
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#include <asm/hypervisor.h>
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extern int ldom_domaining_enabled;
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void ldom_set_var(const char *var, const char *value);
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void ldom_reboot(const char *boot_command);
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void ldom_power_off(void);
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/* The event handler will be evoked when link state changes
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* or data becomes available on the receive side.
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*
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* For non-RAW links, if the LDC_EVENT_RESET event arrives the
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* driver should reset all of it's internal state and reinvoke
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* ldc_connect() to try and bring the link up again.
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*
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* For RAW links, ldc_connect() is not used. Instead the driver
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* just waits for the LDC_EVENT_UP event.
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*/
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struct ldc_channel_config {
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void (*event)(void *arg, int event);
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u32 mtu;
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unsigned int rx_irq;
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unsigned int tx_irq;
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u8 mode;
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#define LDC_MODE_RAW 0x00
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#define LDC_MODE_UNRELIABLE 0x01
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#define LDC_MODE_RESERVED 0x02
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#define LDC_MODE_STREAM 0x03
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u8 debug;
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#define LDC_DEBUG_HS 0x01
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#define LDC_DEBUG_STATE 0x02
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#define LDC_DEBUG_RX 0x04
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#define LDC_DEBUG_TX 0x08
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#define LDC_DEBUG_DATA 0x10
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};
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#define LDC_EVENT_RESET 0x01
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#define LDC_EVENT_UP 0x02
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#define LDC_EVENT_DATA_READY 0x04
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#define LDC_STATE_INVALID 0x00
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#define LDC_STATE_INIT 0x01
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#define LDC_STATE_BOUND 0x02
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#define LDC_STATE_READY 0x03
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#define LDC_STATE_CONNECTED 0x04
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#define LDC_PACKET_SIZE 64
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struct ldc_channel;
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/* Allocate state for a channel. */
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struct ldc_channel *ldc_alloc(unsigned long id,
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const struct ldc_channel_config *cfgp,
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void *event_arg,
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const char *name);
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/* Shut down and free state for a channel. */
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void ldc_free(struct ldc_channel *lp);
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/* Register TX and RX queues of the link with the hypervisor. */
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int ldc_bind(struct ldc_channel *lp);
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void ldc_unbind(struct ldc_channel *lp);
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/* For non-RAW protocols we need to complete a handshake before
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* communication can proceed. ldc_connect() does that, if the
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* handshake completes successfully, an LDC_EVENT_UP event will
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* be sent up to the driver.
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*/
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int ldc_connect(struct ldc_channel *lp);
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int ldc_disconnect(struct ldc_channel *lp);
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int ldc_state(struct ldc_channel *lp);
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void ldc_set_state(struct ldc_channel *lp, u8 state);
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int ldc_mode(struct ldc_channel *lp);
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void __ldc_print(struct ldc_channel *lp, const char *caller);
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int ldc_rx_reset(struct ldc_channel *lp);
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#define ldc_print(chan) __ldc_print(chan, __func__)
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/* Read and write operations. Only valid when the link is up. */
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int ldc_write(struct ldc_channel *lp, const void *buf,
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unsigned int size);
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int ldc_read(struct ldc_channel *lp, void *buf, unsigned int size);
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#define LDC_MAP_SHADOW 0x01
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#define LDC_MAP_DIRECT 0x02
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#define LDC_MAP_IO 0x04
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#define LDC_MAP_R 0x08
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#define LDC_MAP_W 0x10
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#define LDC_MAP_X 0x20
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#define LDC_MAP_RW (LDC_MAP_R | LDC_MAP_W)
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#define LDC_MAP_RWX (LDC_MAP_R | LDC_MAP_W | LDC_MAP_X)
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#define LDC_MAP_ALL 0x03f
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struct ldc_trans_cookie {
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u64 cookie_addr;
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u64 cookie_size;
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};
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struct scatterlist;
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int ldc_map_sg(struct ldc_channel *lp,
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struct scatterlist *sg, int num_sg,
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struct ldc_trans_cookie *cookies, int ncookies,
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unsigned int map_perm);
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int ldc_map_single(struct ldc_channel *lp,
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void *buf, unsigned int len,
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struct ldc_trans_cookie *cookies, int ncookies,
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unsigned int map_perm);
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void ldc_unmap(struct ldc_channel *lp, struct ldc_trans_cookie *cookies,
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int ncookies);
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int ldc_copy(struct ldc_channel *lp, int copy_dir,
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void *buf, unsigned int len, unsigned long offset,
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struct ldc_trans_cookie *cookies, int ncookies);
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static inline int ldc_get_dring_entry(struct ldc_channel *lp,
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void *buf, unsigned int len,
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unsigned long offset,
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struct ldc_trans_cookie *cookies,
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int ncookies)
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{
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return ldc_copy(lp, LDC_COPY_IN, buf, len, offset, cookies, ncookies);
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}
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static inline int ldc_put_dring_entry(struct ldc_channel *lp,
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void *buf, unsigned int len,
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unsigned long offset,
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struct ldc_trans_cookie *cookies,
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int ncookies)
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{
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return ldc_copy(lp, LDC_COPY_OUT, buf, len, offset, cookies, ncookies);
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}
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void *ldc_alloc_exp_dring(struct ldc_channel *lp, unsigned int len,
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struct ldc_trans_cookie *cookies,
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int *ncookies, unsigned int map_perm);
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void ldc_free_exp_dring(struct ldc_channel *lp, void *buf,
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unsigned int len,
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struct ldc_trans_cookie *cookies, int ncookies);
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#endif /* _SPARC64_LDC_H */
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