linux - Contrib clone of linux

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author	Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2017-11-01 15:07:57 +0100
committer	Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2017-11-02 11:10:55 +0100
commit	b24413180f5600bcb3bb70fbed5cf186b60864bd (patch)
tree	4ebcae0dab27ee8bfcecb9a5daf65353c6dd7ed6 /arch/mips/vdso
parent	bb176f67090ca54869fc1262c913aa69d2ede070 (diff)

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

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>

Diffstat (limited to 'arch/mips/vdso')

-rw-r--r--

arch/mips/vdso/Makefile

1 files changed, 1 insertions, 0 deletions

// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2018-2019, Intel Corporation */ #include <linux/arm-smccc.h> #include <linux/bitfield.h> #include <linux/completion.h> #include <linux/kobject.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/firmware/intel/stratix10-svc-client.h> #include <linux/string.h> #include <linux/sysfs.h> #define RSU_STATE_MASK GENMASK_ULL(31, 0) #define RSU_VERSION_MASK GENMASK_ULL(63, 32) #define RSU_ERROR_LOCATION_MASK GENMASK_ULL(31, 0) #define RSU_ERROR_DETAIL_MASK GENMASK_ULL(63, 32) #define RSU_TIMEOUT (msecs_to_jiffies(SVC_RSU_REQUEST_TIMEOUT_MS)) #define INVALID_RETRY_COUNTER 0xFFFFFFFF typedef void (*rsu_callback)(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data); /** * struct stratix10_rsu_priv - rsu data structure * @chan: pointer to the allocated service channel * @client: active service client * @completion: state for callback completion * @lock: a mutex to protect callback completion state * @status.current_image: address of image currently running in flash * @status.fail_image: address of failed image in flash * @status.version: the version number of RSU firmware * @status.state: the state of RSU system * @status.error_details: error code * @status.error_location: the error offset inside the image that failed * @retry_counter: the current image's retry counter */ struct stratix10_rsu_priv { struct stratix10_svc_chan *chan; struct stratix10_svc_client client; struct completion completion; struct mutex lock; struct { unsigned long current_image; unsigned long fail_image; unsigned int version; unsigned int state; unsigned int error_details; unsigned int error_location; } status; unsigned int retry_counter; }; /** * rsu_status_callback() - Status callback from Intel Service Layer * @client: pointer to service client * @data: pointer to callback data structure * * Callback from Intel service layer for RSU status request. Status is * only updated after a system reboot, so a get updated status call is * made during driver probe. */ static void rsu_status_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; struct arm_smccc_res *res = (struct arm_smccc_res *)data->kaddr1; if (data->status == BIT(SVC_STATUS_RSU_OK)) { priv->status.version = FIELD_GET(RSU_VERSION_MASK, res->a2); priv->status.state = FIELD_GET(RSU_STATE_MASK, res->a2); priv->status.fail_image = res->a1; priv->status.current_image = res->a0; priv->status.error_location = FIELD_GET(RSU_ERROR_LOCATION_MASK, res->a3); priv->status.error_details = FIELD_GET(RSU_ERROR_DETAIL_MASK, res->a3); } else { dev_err(client->dev, "COMMAND_RSU_STATUS returned 0x%lX\n", res->a0); priv->status.version = 0; priv->status.state = 0; priv->status.fail_image = 0; priv->status.current_image = 0; priv->status.error_location = 0; priv->status.error_details = 0; } complete(&priv->completion); } /** * rsu_command_callback() - Update callback from Intel Service Layer * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for RSU commands. */ static void rsu_command_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; if (data->status == BIT(SVC_STATUS_RSU_NO_SUPPORT)) dev_warn(client->dev, "Secure FW doesn't support notify\n"); else if (data->status == BIT(SVC_STATUS_RSU_ERROR)) dev_err(client->dev, "Failure, returned status is %lu\n", BIT(data->status)); complete(&priv->completion); } /** * rsu_retry_callback() - Callback from Intel service layer for getting * the current image's retry counter from firmware * @client: pointer to client * @data: pointer to callback data structure * * Callback from Intel service layer for retry counter, which is used by * user to know how many times the images is still allowed to reload * itself before giving up and starting RSU fail-over flow. */ static void rsu_retry_callback(struct stratix10_svc_client *client, struct stratix10_svc_cb_data *data) { struct stratix10_rsu_priv *priv = client->priv; unsigned int *counter = (unsigned int *)data->kaddr1; if (data->status == BIT(SVC_STATUS_RSU_OK)) priv->retry_counter = *counter; else if (data->status == BIT(SVC_STATUS_RSU_NO_SUPPORT)) dev_warn(client->dev, "Secure FW doesn't support retry\n"); else dev_err(client->dev, "Failed to get retry counter %lu\n", BIT(data->status)); complete(&priv->completion); } /** * rsu_send_msg() - send a message to Intel service layer * @priv: pointer to rsu private data * @command: RSU status or update command * @arg: the request argument, the bitstream address or notify status * @callback: function pointer for the callback (status or update) * * Start an Intel service layer transaction to perform the SMC call that * is necessary to get RSU boot log or set the address of bitstream to * boot after reboot. * * Returns 0 on success or -ETIMEDOUT on error. */ static int rsu_send_msg(struct stratix10_rsu_priv *priv, enum stratix10_svc_command_code command, unsigned long arg, rsu_callback callback) { struct stratix10_svc_client_msg msg; int ret; mutex_lock(&priv->lock); reinit_completion(&priv->completion); priv->client.receive_cb = callback; msg.command = command; if (arg) msg.arg[0] = arg; ret = stratix10_svc_send(priv->chan, &msg); if (ret < 0) goto status_done; ret = wait_for_completion_interruptible_timeout(&priv->completion, RSU_TIMEOUT); if (!ret) { dev_err(priv->client.dev, "timeout waiting for SMC call\n"); ret = -ETIMEDOUT; goto status_done; } else if (ret < 0) { dev_err(priv->client.dev, "error %d waiting for SMC call\n", ret); goto status_done; } else { ret = 0; } status_done: stratix10_svc_done(priv->chan); mutex_unlock(&priv->lock); return ret; } /* * This driver exposes some optional features of the Intel Stratix 10 SoC FPGA. * The sysfs interfaces exposed here are FPGA Remote System Update (RSU) * related. They allow user space software to query the configuration system * status and to request optional reboot behavior specific to Intel FPGAs. */ static ssize_t current_image_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08lx\n", priv->status.current_image); } static ssize_t fail_image_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08lx\n", priv->status.fail_image); } static ssize_t version_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->status.version); } static ssize_t state_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->status.state); } static ssize_t error_location_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x\n", priv->status.error_location); } static ssize_t error_details_show(struct device *dev, struct device_attribute *attr, char *buf) { struct stratix10_rsu_priv *priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; return sprintf(buf, "0x%08x


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