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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>
169 lines
4.4 KiB
C
169 lines
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* softing common interfaces
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*
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* by Kurt Van Dijck, 2008-2010
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*/
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#include <linux/atomic.h>
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#include <linux/netdevice.h>
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#include <linux/ktime.h>
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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#include <linux/can.h>
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#include <linux/can/dev.h>
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#include "softing_platform.h"
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struct softing;
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struct softing_priv {
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struct can_priv can; /* must be the first member! */
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struct net_device *netdev;
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struct softing *card;
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struct {
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int pending;
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/* variables which hold the circular buffer */
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int echo_put;
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int echo_get;
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} tx;
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struct can_bittiming_const btr_const;
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int index;
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uint8_t output;
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uint16_t chip;
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};
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#define netdev2softing(netdev) ((struct softing_priv *)netdev_priv(netdev))
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struct softing {
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const struct softing_platform_data *pdat;
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struct platform_device *pdev;
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struct net_device *net[2];
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spinlock_t spin; /* protect this structure & DPRAM access */
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ktime_t ts_ref;
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ktime_t ts_overflow; /* timestamp overflow value, in ktime */
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struct {
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/* indication of firmware status */
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int up;
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/* protection of the 'up' variable */
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struct mutex lock;
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} fw;
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struct {
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int nr;
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int requested;
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int svc_count;
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unsigned int dpram_position;
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} irq;
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struct {
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int pending;
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int last_bus;
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/*
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* keep the bus that last tx'd a message,
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* in order to let every netdev queue resume
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*/
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} tx;
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__iomem uint8_t *dpram;
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unsigned long dpram_phys;
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unsigned long dpram_size;
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struct {
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uint16_t fw_version, hw_version, license, serial;
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uint16_t chip[2];
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unsigned int freq; /* remote cpu's operating frequency */
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} id;
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};
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int softing_default_output(struct net_device *netdev);
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ktime_t softing_raw2ktime(struct softing *card, u32 raw);
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int softing_chip_poweron(struct softing *card);
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int softing_bootloader_command(struct softing *card, int16_t cmd,
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const char *msg);
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/* Load firmware after reset */
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int softing_load_fw(const char *file, struct softing *card,
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__iomem uint8_t *virt, unsigned int size, int offset);
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/* Load final application firmware after bootloader */
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int softing_load_app_fw(const char *file, struct softing *card);
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/*
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* enable or disable irq
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* only called with fw.lock locked
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*/
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int softing_enable_irq(struct softing *card, int enable);
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/* start/stop 1 bus on card */
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int softing_startstop(struct net_device *netdev, int up);
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/* netif_rx() */
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int softing_netdev_rx(struct net_device *netdev, const struct can_frame *msg,
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ktime_t ktime);
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/* SOFTING DPRAM mappings */
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#define DPRAM_RX 0x0000
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#define DPRAM_RX_SIZE 32
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#define DPRAM_RX_CNT 16
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#define DPRAM_RX_RD 0x0201 /* uint8_t */
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#define DPRAM_RX_WR 0x0205 /* uint8_t */
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#define DPRAM_RX_LOST 0x0207 /* uint8_t */
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#define DPRAM_FCT_PARAM 0x0300 /* int16_t [20] */
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#define DPRAM_FCT_RESULT 0x0328 /* int16_t */
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#define DPRAM_FCT_HOST 0x032b /* uint16_t */
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#define DPRAM_INFO_BUSSTATE 0x0331 /* uint16_t */
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#define DPRAM_INFO_BUSSTATE2 0x0335 /* uint16_t */
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#define DPRAM_INFO_ERRSTATE 0x0339 /* uint16_t */
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#define DPRAM_INFO_ERRSTATE2 0x033d /* uint16_t */
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#define DPRAM_RESET 0x0341 /* uint16_t */
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#define DPRAM_CLR_RECV_FIFO 0x0345 /* uint16_t */
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#define DPRAM_RESET_TIME 0x034d /* uint16_t */
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#define DPRAM_TIME 0x0350 /* uint64_t */
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#define DPRAM_WR_START 0x0358 /* uint8_t */
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#define DPRAM_WR_END 0x0359 /* uint8_t */
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#define DPRAM_RESET_RX_FIFO 0x0361 /* uint16_t */
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#define DPRAM_RESET_TX_FIFO 0x0364 /* uint8_t */
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#define DPRAM_READ_FIFO_LEVEL 0x0365 /* uint8_t */
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#define DPRAM_RX_FIFO_LEVEL 0x0366 /* uint16_t */
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#define DPRAM_TX_FIFO_LEVEL 0x0366 /* uint16_t */
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#define DPRAM_TX 0x0400 /* uint16_t */
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#define DPRAM_TX_SIZE 16
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#define DPRAM_TX_CNT 32
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#define DPRAM_TX_RD 0x0601 /* uint8_t */
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#define DPRAM_TX_WR 0x0605 /* uint8_t */
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#define DPRAM_COMMAND 0x07e0 /* uint16_t */
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#define DPRAM_RECEIPT 0x07f0 /* uint16_t */
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#define DPRAM_IRQ_TOHOST 0x07fe /* uint8_t */
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#define DPRAM_IRQ_TOCARD 0x07ff /* uint8_t */
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#define DPRAM_V2_RESET 0x0e00 /* uint8_t */
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#define DPRAM_V2_IRQ_TOHOST 0x0e02 /* uint8_t */
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#define TXMAX (DPRAM_TX_CNT - 1)
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/* DPRAM return codes */
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#define RES_NONE 0
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#define RES_OK 1
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#define RES_NOK 2
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#define RES_UNKNOWN 3
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/* DPRAM flags */
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#define CMD_TX 0x01
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#define CMD_ACK 0x02
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#define CMD_XTD 0x04
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#define CMD_RTR 0x08
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#define CMD_ERR 0x10
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#define CMD_BUS2 0x80
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/* returned fifo entry bus state masks */
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#define SF_MASK_BUSOFF 0x80
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#define SF_MASK_EPASSIVE 0x60
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/* bus states */
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#define STATE_BUSOFF 2
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#define STATE_EPASSIVE 1
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#define STATE_EACTIVE 0
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