Release 4.11 drivers/net/wireless/intel/iwlwifi/iwl-notif-wait.c
/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
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* Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2015 Intel Deutschland GmbH
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* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
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* General Public License for more details.
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* The full GNU General Public License is included in this distribution
* in the file called COPYING.
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* Intel Linux Wireless <linuxwifi@intel.com>
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*****************************************************************************/
#include <linux/sched.h>
#include <linux/export.h>
#include "iwl-drv.h"
#include "iwl-notif-wait.h"
void iwl_notification_wait_init(struct iwl_notif_wait_data *notif_wait)
{
spin_lock_init(¬if_wait->notif_wait_lock);
INIT_LIST_HEAD(¬if_wait->notif_waits);
init_waitqueue_head(¬if_wait->notif_waitq);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 34 | 100.00% | 1 | 100.00% |
Total | 34 | 100.00% | 1 | 100.00% |
IWL_EXPORT_SYMBOL(iwl_notification_wait_init);
void iwl_notification_wait_notify(struct iwl_notif_wait_data *notif_wait,
struct iwl_rx_packet *pkt)
{
bool triggered = false;
if (!list_empty(¬if_wait->notif_waits)) {
struct iwl_notification_wait *w;
spin_lock(¬if_wait->notif_wait_lock);
list_for_each_entry(w, ¬if_wait->notif_waits, list) {
int i;
bool found = false;
/*
* If it already finished (triggered) or has been
* aborted then don't evaluate it again to avoid races,
* Otherwise the function could be called again even
* though it returned true before
*/
if (w->triggered || w->aborted)
continue;
for (i = 0; i < w->n_cmds; i++) {
u16 rec_id = WIDE_ID(pkt->hdr.group_id,
pkt->hdr.cmd);
if (w->cmds[i] == rec_id ||
(!iwl_cmd_groupid(w->cmds[i]) &&
DEF_ID(w->cmds[i]) == rec_id)) {
found = true;
break;
}
}
if (!found)
continue;
if (!w->fn || w->fn(notif_wait, pkt, w->fn_data)) {
w->triggered = true;
triggered = true;
}
}
spin_unlock(¬if_wait->notif_wait_lock);
}
if (triggered)
wake_up_all(¬if_wait->notif_waitq);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 164 | 77.36% | 2 | 50.00% |
Sara Sharon | 48 | 22.64% | 2 | 50.00% |
Total | 212 | 100.00% | 4 | 100.00% |
IWL_EXPORT_SYMBOL(iwl_notification_wait_notify);
void iwl_abort_notification_waits(struct iwl_notif_wait_data *notif_wait)
{
struct iwl_notification_wait *wait_entry;
spin_lock(¬if_wait->notif_wait_lock);
list_for_each_entry(wait_entry, ¬if_wait->notif_waits, list)
wait_entry->aborted = true;
spin_unlock(¬if_wait->notif_wait_lock);
wake_up_all(¬if_wait->notif_waitq);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 51 | 96.23% | 1 | 50.00% |
Emmanuel Grumbach | 2 | 3.77% | 1 | 50.00% |
Total | 53 | 100.00% | 2 | 100.00% |
IWL_EXPORT_SYMBOL(iwl_abort_notification_waits);
void
iwl_init_notification_wait(struct iwl_notif_wait_data *notif_wait,
struct iwl_notification_wait *wait_entry,
const u16 *cmds, int n_cmds,
bool (*fn)(struct iwl_notif_wait_data *notif_wait,
struct iwl_rx_packet *pkt, void *data),
void *fn_data)
{
if (WARN_ON(n_cmds > MAX_NOTIF_CMDS))
n_cmds = MAX_NOTIF_CMDS;
wait_entry->fn = fn;
wait_entry->fn_data = fn_data;
wait_entry->n_cmds = n_cmds;
memcpy(wait_entry->cmds, cmds, n_cmds * sizeof(u16));
wait_entry->triggered = false;
wait_entry->aborted = false;
spin_lock_bh(¬if_wait->notif_wait_lock);
list_add(&wait_entry->list, ¬if_wait->notif_waits);
spin_unlock_bh(¬if_wait->notif_wait_lock);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 130 | 95.59% | 2 | 66.67% |
Sara Sharon | 6 | 4.41% | 1 | 33.33% |
Total | 136 | 100.00% | 3 | 100.00% |
IWL_EXPORT_SYMBOL(iwl_init_notification_wait);
int iwl_wait_notification(struct iwl_notif_wait_data *notif_wait,
struct iwl_notification_wait *wait_entry,
unsigned long timeout)
{
int ret;
ret = wait_event_timeout(notif_wait->notif_waitq,
wait_entry->triggered || wait_entry->aborted,
timeout);
spin_lock_bh(¬if_wait->notif_wait_lock);
list_del(&wait_entry->list);
spin_unlock_bh(¬if_wait->notif_wait_lock);
if (wait_entry->aborted)
return -EIO;
/* return value is always >= 0 */
if (ret <= 0)
return -ETIMEDOUT;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 89 | 100.00% | 1 | 100.00% |
Total | 89 | 100.00% | 1 | 100.00% |
IWL_EXPORT_SYMBOL(iwl_wait_notification);
void iwl_remove_notification(struct iwl_notif_wait_data *notif_wait,
struct iwl_notification_wait *wait_entry)
{
spin_lock_bh(¬if_wait->notif_wait_lock);
list_del(&wait_entry->list);
spin_unlock_bh(¬if_wait->notif_wait_lock);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 39 | 100.00% | 1 | 100.00% |
Total | 39 | 100.00% | 1 | 100.00% |
IWL_EXPORT_SYMBOL(iwl_remove_notification);
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 549 | 90.59% | 4 | 50.00% |
Sara Sharon | 54 | 8.91% | 2 | 25.00% |
Emmanuel Grumbach | 3 | 0.50% | 2 | 25.00% |
Total | 606 | 100.00% | 8 | 100.00% |
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