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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>
160 lines
3.9 KiB
C
160 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef B43legacy_PIO_H_
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#define B43legacy_PIO_H_
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#include "b43legacy.h"
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/skbuff.h>
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#define B43legacy_PIO_TXCTL 0x00
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#define B43legacy_PIO_TXDATA 0x02
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#define B43legacy_PIO_TXQBUFSIZE 0x04
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#define B43legacy_PIO_RXCTL 0x08
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#define B43legacy_PIO_RXDATA 0x0A
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#define B43legacy_PIO_TXCTL_WRITELO (1 << 0)
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#define B43legacy_PIO_TXCTL_WRITEHI (1 << 1)
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#define B43legacy_PIO_TXCTL_COMPLETE (1 << 2)
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#define B43legacy_PIO_TXCTL_INIT (1 << 3)
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#define B43legacy_PIO_TXCTL_SUSPEND (1 << 7)
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#define B43legacy_PIO_RXCTL_DATAAVAILABLE (1 << 0)
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#define B43legacy_PIO_RXCTL_READY (1 << 1)
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/* PIO constants */
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#define B43legacy_PIO_MAXTXDEVQPACKETS 31
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#define B43legacy_PIO_TXQADJUST 80
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/* PIO tuning knobs */
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#define B43legacy_PIO_MAXTXPACKETS 256
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#ifdef CONFIG_B43LEGACY_PIO
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struct b43legacy_pioqueue;
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struct b43legacy_xmitstatus;
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struct b43legacy_pio_txpacket {
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struct b43legacy_pioqueue *queue;
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struct sk_buff *skb;
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struct list_head list;
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};
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#define pio_txpacket_getindex(packet) ((int)((packet) - \
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(packet)->queue->tx_packets_cache))
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struct b43legacy_pioqueue {
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struct b43legacy_wldev *dev;
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u16 mmio_base;
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bool tx_suspended;
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bool tx_frozen;
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bool need_workarounds; /* Workarounds needed for core.rev < 3 */
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/* Adjusted size of the device internal TX buffer. */
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u16 tx_devq_size;
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/* Used octets of the device internal TX buffer. */
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u16 tx_devq_used;
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/* Used packet slots in the device internal TX buffer. */
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u8 tx_devq_packets;
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/* Packets from the txfree list can
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* be taken on incoming TX requests.
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*/
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struct list_head txfree;
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unsigned int nr_txfree;
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/* Packets on the txqueue are queued,
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* but not completely written to the chip, yet.
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*/
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struct list_head txqueue;
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/* Packets on the txrunning queue are completely
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* posted to the device. We are waiting for the txstatus.
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*/
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struct list_head txrunning;
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struct tasklet_struct txtask;
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struct b43legacy_pio_txpacket
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tx_packets_cache[B43legacy_PIO_MAXTXPACKETS];
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};
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static inline
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u16 b43legacy_pio_read(struct b43legacy_pioqueue *queue,
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u16 offset)
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{
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return b43legacy_read16(queue->dev, queue->mmio_base + offset);
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}
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static inline
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void b43legacy_pio_write(struct b43legacy_pioqueue *queue,
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u16 offset, u16 value)
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{
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b43legacy_write16(queue->dev, queue->mmio_base + offset, value);
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mmiowb();
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}
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int b43legacy_pio_init(struct b43legacy_wldev *dev);
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void b43legacy_pio_free(struct b43legacy_wldev *dev);
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int b43legacy_pio_tx(struct b43legacy_wldev *dev,
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struct sk_buff *skb);
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void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev,
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const struct b43legacy_txstatus *status);
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void b43legacy_pio_rx(struct b43legacy_pioqueue *queue);
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/* Suspend TX queue in hardware. */
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void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue);
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void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue);
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/* Suspend (freeze) the TX tasklet (software level). */
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void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev);
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void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev);
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#else /* CONFIG_B43LEGACY_PIO */
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static inline
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int b43legacy_pio_init(struct b43legacy_wldev *dev)
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{
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return 0;
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}
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static inline
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void b43legacy_pio_free(struct b43legacy_wldev *dev)
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{
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}
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static inline
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int b43legacy_pio_tx(struct b43legacy_wldev *dev,
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struct sk_buff *skb)
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{
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return 0;
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}
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static inline
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void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev,
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const struct b43legacy_txstatus *status)
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{
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}
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static inline
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void b43legacy_pio_rx(struct b43legacy_pioqueue *queue)
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{
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}
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static inline
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void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue)
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{
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}
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static inline
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void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue)
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{
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}
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static inline
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void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev)
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{
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}
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static inline
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void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev)
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{
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}
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#endif /* CONFIG_B43LEGACY_PIO */
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#endif /* B43legacy_PIO_H_ */
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