| /* |
| * Copyright (c) 2014-2016 The Linux Foundation. All rights reserved. |
| * |
| * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| * |
| * |
| * Permission to use, copy, modify, and/or distribute this software for |
| * any purpose with or without fee is hereby granted, provided that the |
| * above copyright notice and this permission notice appear in all |
| * copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| * PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| /* |
| * This file was originally distributed by Qualcomm Atheros, Inc. |
| * under proprietary terms before Copyright ownership was assigned |
| * to the Linux Foundation. |
| */ |
| |
| /** |
| * DOC: cds_mc_timer.c |
| * Connectivity driver services timer APIs |
| */ |
| |
| #include <qdf_mc_timer.h> |
| #include "cds_mc_timer.h" |
| #include <wlan_qct_sys.h> |
| #include <qdf_trace.h> |
| #include "cds_mq.h" |
| |
| /** |
| * cds_linux_timer_callback() - timer callback, gets called at time out. |
| * @data: unsigned long, holds the timer object. |
| * |
| * Return: None |
| */ |
| void cds_linux_timer_callback(unsigned long data) |
| { |
| qdf_mc_timer_t *timer = (qdf_mc_timer_t *)data; |
| cds_msg_t msg; |
| QDF_STATUS status; |
| |
| qdf_mc_timer_callback_t callback = NULL; |
| void *user_data = NULL; |
| QDF_TIMER_TYPE type = QDF_TIMER_TYPE_SW; |
| |
| QDF_ASSERT(timer); |
| |
| if (timer == NULL) { |
| QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_ERROR, |
| "%s Null pointer passed in!", __func__); |
| return; |
| } |
| |
| qdf_spin_lock_irqsave(&timer->platform_info.spinlock); |
| |
| switch (timer->state) { |
| case QDF_TIMER_STATE_STARTING: |
| /* we are in this state because someone just started the timer, |
| * MC timer got started and expired, but the time content have |
| * not been updated this is a rare race condition! |
| */ |
| timer->state = QDF_TIMER_STATE_STOPPED; |
| status = QDF_STATUS_E_ALREADY; |
| break; |
| |
| case QDF_TIMER_STATE_STOPPED: |
| status = QDF_STATUS_E_ALREADY; |
| break; |
| |
| case QDF_TIMER_STATE_UNUSED: |
| status = QDF_STATUS_E_EXISTS; |
| break; |
| |
| case QDF_TIMER_STATE_RUNNING: |
| /* need to go to stop state here because the call-back function |
| * may restart timer (to emulate periodic timer) |
| */ |
| timer->state = QDF_TIMER_STATE_STOPPED; |
| /* copy the relevant timer information to local variables; |
| * once we exits from this critical section, the timer content |
| * may be modified by other tasks |
| */ |
| callback = timer->callback; |
| user_data = timer->user_data; |
| type = timer->type; |
| status = QDF_STATUS_SUCCESS; |
| break; |
| |
| default: |
| QDF_ASSERT(0); |
| status = QDF_STATUS_E_FAULT; |
| break; |
| } |
| |
| qdf_spin_unlock_irqrestore(&timer->platform_info.spinlock); |
| |
| if (QDF_STATUS_SUCCESS != status) { |
| QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_ERROR, |
| "TIMER callback called in a wrong state=%d", |
| timer->state); |
| return; |
| } |
| |
| qdf_try_allowing_sleep(type); |
| |
| if (callback == NULL) { |
| QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_ERROR, |
| "%s: No TIMER callback, Could not enqueue timer to any queue", |
| __func__); |
| QDF_ASSERT(0); |
| return; |
| } |
| |
| /* serialize to the MC thread */ |
| sys_build_message_header(SYS_MSG_ID_MC_TIMER, &msg); |
| msg.callback = callback; |
| msg.bodyptr = user_data; |
| msg.bodyval = 0; |
| |
| if (cds_mq_post_message(CDS_MQ_ID_SYS, &msg) == QDF_STATUS_SUCCESS) |
| return; |
| QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_ERROR, |
| "%s: Could not enqueue timer to any queue", __func__); |
| QDF_ASSERT(0); |
| } |