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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
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>
399 lines
12 KiB
C
399 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright IBM Corp. 2002
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* Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
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* Martin Schwidefsky (schwidefsky@de.ibm.com)
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*
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* Status accumulation and basic sense functions.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <asm/ccwdev.h>
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#include <asm/cio.h>
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#include "cio.h"
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#include "cio_debug.h"
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#include "css.h"
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#include "device.h"
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#include "ioasm.h"
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#include "io_sch.h"
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/*
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* Check for any kind of channel or interface control check but don't
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* issue the message for the console device
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*/
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static void
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ccw_device_msg_control_check(struct ccw_device *cdev, struct irb *irb)
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{
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struct subchannel *sch = to_subchannel(cdev->dev.parent);
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char dbf_text[15];
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if (!scsw_is_valid_cstat(&irb->scsw) ||
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!(scsw_cstat(&irb->scsw) & (SCHN_STAT_CHN_DATA_CHK |
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SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK)))
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return;
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CIO_MSG_EVENT(0, "Channel-Check or Interface-Control-Check "
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"received"
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" ... device %04x on subchannel 0.%x.%04x, dev_stat "
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": %02X sch_stat : %02X\n",
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cdev->private->dev_id.devno, sch->schid.ssid,
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sch->schid.sch_no,
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scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw));
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sprintf(dbf_text, "chk%x", sch->schid.sch_no);
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CIO_TRACE_EVENT(0, dbf_text);
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CIO_HEX_EVENT(0, irb, sizeof(struct irb));
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}
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/*
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* Some paths became not operational (pno bit in scsw is set).
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*/
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static void
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ccw_device_path_notoper(struct ccw_device *cdev)
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{
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struct subchannel *sch;
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sch = to_subchannel(cdev->dev.parent);
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if (cio_update_schib(sch))
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goto doverify;
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CIO_MSG_EVENT(0, "%s(0.%x.%04x) - path(s) %02x are "
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"not operational \n", __func__,
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sch->schid.ssid, sch->schid.sch_no,
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sch->schib.pmcw.pnom);
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sch->lpm &= ~sch->schib.pmcw.pnom;
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doverify:
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cdev->private->flags.doverify = 1;
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}
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/*
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* Copy valid bits from the extended control word to device irb.
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*/
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static void
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ccw_device_accumulate_ecw(struct ccw_device *cdev, struct irb *irb)
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{
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/*
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* Copy extended control bit if it is valid... yes there
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* are condition that have to be met for the extended control
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* bit to have meaning. Sick.
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*/
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cdev->private->irb.scsw.cmd.ectl = 0;
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if ((irb->scsw.cmd.stctl & SCSW_STCTL_ALERT_STATUS) &&
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!(irb->scsw.cmd.stctl & SCSW_STCTL_INTER_STATUS))
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cdev->private->irb.scsw.cmd.ectl = irb->scsw.cmd.ectl;
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/* Check if extended control word is valid. */
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if (!cdev->private->irb.scsw.cmd.ectl)
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return;
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/* Copy concurrent sense / model dependent information. */
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memcpy (&cdev->private->irb.ecw, irb->ecw, sizeof (irb->ecw));
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}
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/*
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* Check if extended status word is valid.
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*/
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static int
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ccw_device_accumulate_esw_valid(struct irb *irb)
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{
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if (!irb->scsw.cmd.eswf &&
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(irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND))
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return 0;
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if (irb->scsw.cmd.stctl ==
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(SCSW_STCTL_INTER_STATUS|SCSW_STCTL_STATUS_PEND) &&
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!(irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED))
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return 0;
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return 1;
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}
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/*
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* Copy valid bits from the extended status word to device irb.
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*/
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static void
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ccw_device_accumulate_esw(struct ccw_device *cdev, struct irb *irb)
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{
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struct irb *cdev_irb;
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struct sublog *cdev_sublog, *sublog;
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if (!ccw_device_accumulate_esw_valid(irb))
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return;
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cdev_irb = &cdev->private->irb;
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/* Copy last path used mask. */
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cdev_irb->esw.esw1.lpum = irb->esw.esw1.lpum;
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/* Copy subchannel logout information if esw is of format 0. */
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if (irb->scsw.cmd.eswf) {
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cdev_sublog = &cdev_irb->esw.esw0.sublog;
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sublog = &irb->esw.esw0.sublog;
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/* Copy extended status flags. */
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cdev_sublog->esf = sublog->esf;
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/*
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* Copy fields that have a meaning for channel data check
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* channel control check and interface control check.
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*/
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if (irb->scsw.cmd.cstat & (SCHN_STAT_CHN_DATA_CHK |
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SCHN_STAT_CHN_CTRL_CHK |
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SCHN_STAT_INTF_CTRL_CHK)) {
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/* Copy ancillary report bit. */
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cdev_sublog->arep = sublog->arep;
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/* Copy field-validity-flags. */
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cdev_sublog->fvf = sublog->fvf;
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/* Copy storage access code. */
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cdev_sublog->sacc = sublog->sacc;
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/* Copy termination code. */
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cdev_sublog->termc = sublog->termc;
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/* Copy sequence code. */
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cdev_sublog->seqc = sublog->seqc;
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}
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/* Copy device status check. */
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cdev_sublog->devsc = sublog->devsc;
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/* Copy secondary error. */
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cdev_sublog->serr = sublog->serr;
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/* Copy i/o-error alert. */
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cdev_sublog->ioerr = sublog->ioerr;
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/* Copy channel path timeout bit. */
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if (irb->scsw.cmd.cstat & SCHN_STAT_INTF_CTRL_CHK)
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cdev_irb->esw.esw0.erw.cpt = irb->esw.esw0.erw.cpt;
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/* Copy failing storage address validity flag. */
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cdev_irb->esw.esw0.erw.fsavf = irb->esw.esw0.erw.fsavf;
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if (cdev_irb->esw.esw0.erw.fsavf) {
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/* ... and copy the failing storage address. */
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memcpy(cdev_irb->esw.esw0.faddr, irb->esw.esw0.faddr,
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sizeof (irb->esw.esw0.faddr));
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/* ... and copy the failing storage address format. */
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cdev_irb->esw.esw0.erw.fsaf = irb->esw.esw0.erw.fsaf;
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}
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/* Copy secondary ccw address validity bit. */
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cdev_irb->esw.esw0.erw.scavf = irb->esw.esw0.erw.scavf;
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if (irb->esw.esw0.erw.scavf)
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/* ... and copy the secondary ccw address. */
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cdev_irb->esw.esw0.saddr = irb->esw.esw0.saddr;
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}
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/* FIXME: DCTI for format 2? */
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/* Copy authorization bit. */
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cdev_irb->esw.esw0.erw.auth = irb->esw.esw0.erw.auth;
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/* Copy path verification required flag. */
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cdev_irb->esw.esw0.erw.pvrf = irb->esw.esw0.erw.pvrf;
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if (irb->esw.esw0.erw.pvrf)
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cdev->private->flags.doverify = 1;
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/* Copy concurrent sense bit. */
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cdev_irb->esw.esw0.erw.cons = irb->esw.esw0.erw.cons;
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if (irb->esw.esw0.erw.cons)
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cdev_irb->esw.esw0.erw.scnt = irb->esw.esw0.erw.scnt;
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}
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/*
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* Accumulate status from irb to devstat.
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*/
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void
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ccw_device_accumulate_irb(struct ccw_device *cdev, struct irb *irb)
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{
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struct irb *cdev_irb;
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/*
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* Check if the status pending bit is set in stctl.
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* If not, the remaining bit have no meaning and we must ignore them.
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* The esw is not meaningful as well...
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*/
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if (!(scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND))
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return;
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/* Check for channel checks and interface control checks. */
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ccw_device_msg_control_check(cdev, irb);
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/* Check for path not operational. */
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if (scsw_is_valid_pno(&irb->scsw) && scsw_pno(&irb->scsw))
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ccw_device_path_notoper(cdev);
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/* No irb accumulation for transport mode irbs. */
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if (scsw_is_tm(&irb->scsw)) {
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memcpy(&cdev->private->irb, irb, sizeof(struct irb));
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return;
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}
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/*
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* Don't accumulate unsolicited interrupts.
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*/
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if (!scsw_is_solicited(&irb->scsw))
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return;
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cdev_irb = &cdev->private->irb;
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/*
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* If the clear function had been performed, all formerly pending
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* status at the subchannel has been cleared and we must not pass
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* intermediate accumulated status to the device driver.
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*/
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if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC)
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memset(&cdev->private->irb, 0, sizeof(struct irb));
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/* Copy bits which are valid only for the start function. */
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if (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) {
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/* Copy key. */
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cdev_irb->scsw.cmd.key = irb->scsw.cmd.key;
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/* Copy suspend control bit. */
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cdev_irb->scsw.cmd.sctl = irb->scsw.cmd.sctl;
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/* Accumulate deferred condition code. */
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cdev_irb->scsw.cmd.cc |= irb->scsw.cmd.cc;
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/* Copy ccw format bit. */
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cdev_irb->scsw.cmd.fmt = irb->scsw.cmd.fmt;
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/* Copy prefetch bit. */
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cdev_irb->scsw.cmd.pfch = irb->scsw.cmd.pfch;
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/* Copy initial-status-interruption-control. */
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cdev_irb->scsw.cmd.isic = irb->scsw.cmd.isic;
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/* Copy address limit checking control. */
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cdev_irb->scsw.cmd.alcc = irb->scsw.cmd.alcc;
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/* Copy suppress suspend bit. */
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cdev_irb->scsw.cmd.ssi = irb->scsw.cmd.ssi;
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}
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/* Take care of the extended control bit and extended control word. */
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ccw_device_accumulate_ecw(cdev, irb);
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/* Accumulate function control. */
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cdev_irb->scsw.cmd.fctl |= irb->scsw.cmd.fctl;
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/* Copy activity control. */
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cdev_irb->scsw.cmd.actl = irb->scsw.cmd.actl;
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/* Accumulate status control. */
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cdev_irb->scsw.cmd.stctl |= irb->scsw.cmd.stctl;
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/*
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* Copy ccw address if it is valid. This is a bit simplified
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* but should be close enough for all practical purposes.
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*/
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if ((irb->scsw.cmd.stctl & SCSW_STCTL_PRIM_STATUS) ||
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((irb->scsw.cmd.stctl ==
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(SCSW_STCTL_INTER_STATUS|SCSW_STCTL_STATUS_PEND)) &&
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(irb->scsw.cmd.actl & SCSW_ACTL_DEVACT) &&
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(irb->scsw.cmd.actl & SCSW_ACTL_SCHACT)) ||
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(irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED))
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cdev_irb->scsw.cmd.cpa = irb->scsw.cmd.cpa;
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/* Accumulate device status, but not the device busy flag. */
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cdev_irb->scsw.cmd.dstat &= ~DEV_STAT_BUSY;
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/* dstat is not always valid. */
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if (irb->scsw.cmd.stctl &
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(SCSW_STCTL_PRIM_STATUS | SCSW_STCTL_SEC_STATUS
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| SCSW_STCTL_INTER_STATUS | SCSW_STCTL_ALERT_STATUS))
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cdev_irb->scsw.cmd.dstat |= irb->scsw.cmd.dstat;
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/* Accumulate subchannel status. */
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cdev_irb->scsw.cmd.cstat |= irb->scsw.cmd.cstat;
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/* Copy residual count if it is valid. */
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if ((irb->scsw.cmd.stctl & SCSW_STCTL_PRIM_STATUS) &&
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(irb->scsw.cmd.cstat & ~(SCHN_STAT_PCI | SCHN_STAT_INCORR_LEN))
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== 0)
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cdev_irb->scsw.cmd.count = irb->scsw.cmd.count;
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/* Take care of bits in the extended status word. */
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ccw_device_accumulate_esw(cdev, irb);
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/*
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* Check whether we must issue a SENSE CCW ourselves if there is no
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* concurrent sense facility installed for the subchannel.
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* No sense is required if no delayed sense is pending
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* and we did not get a unit check without sense information.
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*
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* Note: We should check for ioinfo[irq]->flags.consns but VM
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* violates the ESA/390 architecture and doesn't present an
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* operand exception for virtual devices without concurrent
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* sense facility available/supported when enabling the
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* concurrent sense facility.
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*/
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if ((cdev_irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
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!(cdev_irb->esw.esw0.erw.cons))
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cdev->private->flags.dosense = 1;
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}
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/*
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* Do a basic sense.
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*/
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int
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ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb)
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{
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struct subchannel *sch;
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struct ccw1 *sense_ccw;
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int rc;
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sch = to_subchannel(cdev->dev.parent);
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/* A sense is required, can we do it now ? */
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if (scsw_actl(&irb->scsw) & (SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT))
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/*
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* we received an Unit Check but we have no final
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* status yet, therefore we must delay the SENSE
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* processing. We must not report this intermediate
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* status to the device interrupt handler.
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*/
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return -EBUSY;
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/*
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* We have ending status but no sense information. Do a basic sense.
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*/
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sense_ccw = &to_io_private(sch)->sense_ccw;
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sense_ccw->cmd_code = CCW_CMD_BASIC_SENSE;
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sense_ccw->cda = (__u32) __pa(cdev->private->irb.ecw);
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sense_ccw->count = SENSE_MAX_COUNT;
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sense_ccw->flags = CCW_FLAG_SLI;
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rc = cio_start(sch, sense_ccw, 0xff);
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if (rc == -ENODEV || rc == -EACCES)
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dev_fsm_event(cdev, DEV_EVENT_VERIFY);
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return rc;
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}
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/*
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* Add information from basic sense to devstat.
|
|
*/
|
|
void
|
|
ccw_device_accumulate_basic_sense(struct ccw_device *cdev, struct irb *irb)
|
|
{
|
|
/*
|
|
* Check if the status pending bit is set in stctl.
|
|
* If not, the remaining bit have no meaning and we must ignore them.
|
|
* The esw is not meaningful as well...
|
|
*/
|
|
if (!(scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND))
|
|
return;
|
|
|
|
/* Check for channel checks and interface control checks. */
|
|
ccw_device_msg_control_check(cdev, irb);
|
|
|
|
/* Check for path not operational. */
|
|
if (scsw_is_valid_pno(&irb->scsw) && scsw_pno(&irb->scsw))
|
|
ccw_device_path_notoper(cdev);
|
|
|
|
if (!(irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
|
|
(irb->scsw.cmd.dstat & DEV_STAT_CHN_END)) {
|
|
cdev->private->irb.esw.esw0.erw.cons = 1;
|
|
cdev->private->flags.dosense = 0;
|
|
}
|
|
/* Check if path verification is required. */
|
|
if (ccw_device_accumulate_esw_valid(irb) &&
|
|
irb->esw.esw0.erw.pvrf)
|
|
cdev->private->flags.doverify = 1;
|
|
}
|
|
|
|
/*
|
|
* This function accumulates the status into the private devstat and
|
|
* starts a basic sense if one is needed.
|
|
*/
|
|
int
|
|
ccw_device_accumulate_and_sense(struct ccw_device *cdev, struct irb *irb)
|
|
{
|
|
ccw_device_accumulate_irb(cdev, irb);
|
|
if ((irb->scsw.cmd.actl & (SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT)) != 0)
|
|
return -EBUSY;
|
|
/* Check for basic sense. */
|
|
if (cdev->private->flags.dosense &&
|
|
!(irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)) {
|
|
cdev->private->irb.esw.esw0.erw.cons = 1;
|
|
cdev->private->flags.dosense = 0;
|
|
return 0;
|
|
}
|
|
if (cdev->private->flags.dosense) {
|
|
ccw_device_do_sense(cdev, irb);
|
|
return -EBUSY;
|
|
}
|
|
return 0;
|
|
}
|
|
|