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linux_dsm_epyc7002/drivers/net/wireless/marvell/libertas/cmdresp.c
Greg Kroah-Hartman b24413180f 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>
2017-11-02 11:10:55 +01:00

357 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* This file contains the handling of command
* responses as well as events generated by firmware.
*/
#include <linux/hardirq.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <asm/unaligned.h>
#include <net/cfg80211.h>
#include "cfg.h"
#include "cmd.h"
/**
* lbs_mac_event_disconnected - handles disconnect event. It
* reports disconnect to upper layer, clean tx/rx packets,
* reset link state etc.
*
* @priv: A pointer to struct lbs_private structure
* @locally_generated: indicates disconnect was requested locally
* (usually by userspace)
*
* returns: n/a
*/
void lbs_mac_event_disconnected(struct lbs_private *priv,
bool locally_generated)
{
unsigned long flags;
if (priv->connect_status != LBS_CONNECTED)
return;
/*
* Cisco AP sends EAP failure and de-auth in less than 0.5 ms.
* It causes problem in the Supplicant
*/
msleep_interruptible(1000);
if (priv->wdev->iftype == NL80211_IFTYPE_STATION)
lbs_send_disconnect_notification(priv, locally_generated);
/* report disconnect to upper layer */
netif_stop_queue(priv->dev);
netif_carrier_off(priv->dev);
/* Free Tx and Rx packets */
spin_lock_irqsave(&priv->driver_lock, flags);
kfree_skb(priv->currenttxskb);
priv->currenttxskb = NULL;
priv->tx_pending_len = 0;
spin_unlock_irqrestore(&priv->driver_lock, flags);
priv->connect_status = LBS_DISCONNECTED;
if (priv->psstate != PS_STATE_FULL_POWER) {
/* make firmware to exit PS mode */
lbs_deb_cmd("disconnected, so exit PS mode\n");
lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
}
}
int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
{
uint16_t respcmd, curcmd;
struct cmd_header *resp;
int ret = 0;
unsigned long flags;
uint16_t result;
mutex_lock(&priv->lock);
spin_lock_irqsave(&priv->driver_lock, flags);
if (!priv->cur_cmd) {
lbs_deb_host("CMD_RESP: cur_cmd is NULL\n");
ret = -1;
spin_unlock_irqrestore(&priv->driver_lock, flags);
goto done;
}
resp = (void *)data;
curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
respcmd = le16_to_cpu(resp->command);
result = le16_to_cpu(resp->result);
lbs_deb_cmd("CMD_RESP: response 0x%04x, seq %d, size %d\n",
respcmd, le16_to_cpu(resp->seqnum), len);
lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, len);
if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
netdev_info(priv->dev,
"Received CMD_RESP with invalid sequence %d (expected %d)\n",
le16_to_cpu(resp->seqnum),
le16_to_cpu(priv->cur_cmd->cmdbuf->seqnum));
spin_unlock_irqrestore(&priv->driver_lock, flags);
ret = -1;
goto done;
}
if (respcmd != CMD_RET(curcmd) &&
respcmd != CMD_RET_802_11_ASSOCIATE && curcmd != CMD_802_11_ASSOCIATE) {
netdev_info(priv->dev, "Invalid CMD_RESP %x to command %x!\n",
respcmd, curcmd);
spin_unlock_irqrestore(&priv->driver_lock, flags);
ret = -1;
goto done;
}
if (resp->result == cpu_to_le16(0x0004)) {
/* 0x0004 means -EAGAIN. Drop the response, let it time out
and be resubmitted */
netdev_info(priv->dev,
"Firmware returns DEFER to command %x. Will let it time out...\n",
le16_to_cpu(resp->command));
spin_unlock_irqrestore(&priv->driver_lock, flags);
ret = -1;
goto done;
}
/* Now we got response from FW, cancel the command timer */
del_timer(&priv->command_timer);
priv->cmd_timed_out = 0;
if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) {
/* struct cmd_ds_802_11_ps_mode also contains
* the header
*/
struct cmd_ds_802_11_ps_mode *psmode = (void *)resp;
u16 action = le16_to_cpu(psmode->action);
lbs_deb_host(
"CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n",
result, action);
if (result) {
lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n",
result);
/*
* We should not re-try enter-ps command in
* ad-hoc mode. It takes place in
* lbs_execute_next_command().
*/
if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR &&
action == PS_MODE_ACTION_ENTER_PS)
priv->psmode = LBS802_11POWERMODECAM;
} else if (action == PS_MODE_ACTION_ENTER_PS) {
priv->needtowakeup = 0;
priv->psstate = PS_STATE_AWAKE;
lbs_deb_host("CMD_RESP: ENTER_PS command response\n");
if (priv->connect_status != LBS_CONNECTED) {
/*
* When Deauth Event received before Enter_PS command
* response, We need to wake up the firmware.
*/
lbs_deb_host(
"disconnected, invoking lbs_ps_wakeup\n");
spin_unlock_irqrestore(&priv->driver_lock, flags);
mutex_unlock(&priv->lock);
lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS,
false);
mutex_lock(&priv->lock);
spin_lock_irqsave(&priv->driver_lock, flags);
}
} else if (action == PS_MODE_ACTION_EXIT_PS) {
priv->needtowakeup = 0;
priv->psstate = PS_STATE_FULL_POWER;
lbs_deb_host("CMD_RESP: EXIT_PS command response\n");
} else {
lbs_deb_host("CMD_RESP: PS action 0x%X\n", action);
}
__lbs_complete_command(priv, priv->cur_cmd, result);
spin_unlock_irqrestore(&priv->driver_lock, flags);
ret = 0;
goto done;
}
/* If the command is not successful, cleanup and return failure */
if ((result != 0 || !(respcmd & 0x8000))) {
lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n",
result, respcmd);
/*
* Handling errors here
*/
switch (respcmd) {
case CMD_RET(CMD_GET_HW_SPEC):
case CMD_RET(CMD_802_11_RESET):
lbs_deb_host("CMD_RESP: reset failed\n");
break;
}
__lbs_complete_command(priv, priv->cur_cmd, result);
spin_unlock_irqrestore(&priv->driver_lock, flags);
ret = -1;
goto done;
}
spin_unlock_irqrestore(&priv->driver_lock, flags);
if (priv->cur_cmd && priv->cur_cmd->callback) {
ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
resp);
}
spin_lock_irqsave(&priv->driver_lock, flags);
if (priv->cur_cmd) {
/* Clean up and Put current command back to cmdfreeq */
__lbs_complete_command(priv, priv->cur_cmd, result);
}
spin_unlock_irqrestore(&priv->driver_lock, flags);
done:
mutex_unlock(&priv->lock);
return ret;
}
int lbs_process_event(struct lbs_private *priv, u32 event)
{
int ret = 0;
struct cmd_header cmd;
switch (event) {
case MACREG_INT_CODE_LINK_SENSED:
lbs_deb_cmd("EVENT: link sensed\n");
break;
case MACREG_INT_CODE_DEAUTHENTICATED:
lbs_deb_cmd("EVENT: deauthenticated\n");
lbs_mac_event_disconnected(priv, false);
break;
case MACREG_INT_CODE_DISASSOCIATED:
lbs_deb_cmd("EVENT: disassociated\n");
lbs_mac_event_disconnected(priv, false);
break;
case MACREG_INT_CODE_LINK_LOST_NO_SCAN:
lbs_deb_cmd("EVENT: link lost\n");
lbs_mac_event_disconnected(priv, true);
break;
case MACREG_INT_CODE_PS_SLEEP:
lbs_deb_cmd("EVENT: ps sleep\n");
/* handle unexpected PS SLEEP event */
if (priv->psstate == PS_STATE_FULL_POWER) {
lbs_deb_cmd(
"EVENT: in FULL POWER mode, ignoring PS_SLEEP\n");
break;
}
if (!list_empty(&priv->cmdpendingq)) {
lbs_deb_cmd("EVENT: commands in queue, do not sleep\n");
break;
}
priv->psstate = PS_STATE_PRE_SLEEP;
lbs_ps_confirm_sleep(priv);
break;
case MACREG_INT_CODE_HOST_AWAKE:
lbs_deb_cmd("EVENT: host awake\n");
if (priv->reset_deep_sleep_wakeup)
priv->reset_deep_sleep_wakeup(priv);
priv->is_deep_sleep = 0;
lbs_cmd_async(priv, CMD_802_11_WAKEUP_CONFIRM, &cmd,
sizeof(cmd));
priv->is_host_sleep_activated = 0;
wake_up_interruptible(&priv->host_sleep_q);
break;
case MACREG_INT_CODE_DEEP_SLEEP_AWAKE:
if (priv->reset_deep_sleep_wakeup)
priv->reset_deep_sleep_wakeup(priv);
lbs_deb_cmd("EVENT: ds awake\n");
priv->is_deep_sleep = 0;
priv->wakeup_dev_required = 0;
wake_up_interruptible(&priv->ds_awake_q);
break;
case MACREG_INT_CODE_PS_AWAKE:
lbs_deb_cmd("EVENT: ps awake\n");
/* handle unexpected PS AWAKE event */
if (priv->psstate == PS_STATE_FULL_POWER) {
lbs_deb_cmd(
"EVENT: In FULL POWER mode - ignore PS AWAKE\n");
break;
}
priv->psstate = PS_STATE_AWAKE;
if (priv->needtowakeup) {
/*
* wait for the command processing to finish
* before resuming sending
* priv->needtowakeup will be set to FALSE
* in lbs_ps_wakeup()
*/
lbs_deb_cmd("waking up ...\n");
lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
}
break;
case MACREG_INT_CODE_MIC_ERR_UNICAST:
lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n");
lbs_send_mic_failureevent(priv, event);
break;
case MACREG_INT_CODE_MIC_ERR_MULTICAST:
lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n");
lbs_send_mic_failureevent(priv, event);
break;
case MACREG_INT_CODE_MIB_CHANGED:
lbs_deb_cmd("EVENT: MIB CHANGED\n");
break;
case MACREG_INT_CODE_INIT_DONE:
lbs_deb_cmd("EVENT: INIT DONE\n");
break;
case MACREG_INT_CODE_ADHOC_BCN_LOST:
lbs_deb_cmd("EVENT: ADHOC beacon lost\n");
break;
case MACREG_INT_CODE_RSSI_LOW:
netdev_alert(priv->dev, "EVENT: rssi low\n");
break;
case MACREG_INT_CODE_SNR_LOW:
netdev_alert(priv->dev, "EVENT: snr low\n");
break;
case MACREG_INT_CODE_MAX_FAIL:
netdev_alert(priv->dev, "EVENT: max fail\n");
break;
case MACREG_INT_CODE_RSSI_HIGH:
netdev_alert(priv->dev, "EVENT: rssi high\n");
break;
case MACREG_INT_CODE_SNR_HIGH:
netdev_alert(priv->dev, "EVENT: snr high\n");
break;
case MACREG_INT_CODE_MESH_AUTO_STARTED:
/* Ignore spurious autostart events */
netdev_info(priv->dev, "EVENT: MESH_AUTO_STARTED (ignoring)\n");
break;
default:
netdev_alert(priv->dev, "EVENT: unknown event id %d\n", event);
break;
}
return ret;
}
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