--- /dev/null
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
+ *
+ * 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
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called COPYING.
+ *
+ * Contact Information:
+ * Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+#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);
+}
+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++) {
+ if (w->cmds[i] == pkt->hdr.cmd) {
+ 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);
+}
+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);
+}
+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 u8 *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);
+ 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);
+}
+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;
+}
+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);
+}
+IWL_EXPORT_SYMBOL(iwl_remove_notification);
Code Review / kvmfornfv.git / blobdiff