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mailbox: mediatek: cmdq: clear task in channel before shutdown

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Do success callback in channel when shutdown. For those task not finish,
callback with error code thus client has chance to cleanup or reset.

Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@mediatek.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Reviewed-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
This commit is contained in:
Dennis YC Hsieh 2020-07-05 14:37:16 +08:00 committed by Jassi Brar
parent bb2b06e081
commit 8849969863
1 changed files with 38 additions and 0 deletions
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38
drivers/mailbox/mtk-cmdq-mailbox.c
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@ -349,6 +349,12 @@ static int cmdq_mbox_send_data(struct mbox_chan *chan, void *data)
if (list_empty(&thread->task_busy_list)) {
WARN_ON(clk_enable(cmdq->clock) < 0);
/*
* The thread reset will clear thread related register to 0,
* including pc, end, priority, irq, suspend and enable. Thus
* set CMDQ_THR_ENABLED to CMDQ_THR_ENABLE_TASK will enable
* thread and make it running.
*/
WARN_ON(cmdq_thread_reset(cmdq, thread) < 0);
writel(task->pa_base >> cmdq->shift_pa,
@ -391,6 +397,38 @@ static int cmdq_mbox_startup(struct mbox_chan *chan)
static void cmdq_mbox_shutdown(struct mbox_chan *chan)
{
struct cmdq_thread *thread = (struct cmdq_thread *)chan->con_priv;
struct cmdq *cmdq = dev_get_drvdata(chan->mbox->dev);
struct cmdq_task *task, *tmp;
unsigned long flags;
spin_lock_irqsave(&thread->chan->lock, flags);
if (list_empty(&thread->task_busy_list))
goto done;
WARN_ON(cmdq_thread_suspend(cmdq, thread) < 0);
/* make sure executed tasks have success callback */
cmdq_thread_irq_handler(cmdq, thread);
if (list_empty(&thread->task_busy_list))
goto done;
list_for_each_entry_safe(task, tmp, &thread->task_busy_list,
list_entry) {
cmdq_task_exec_done(task, CMDQ_CB_ERROR);
kfree(task);
}
cmdq_thread_disable(cmdq, thread);
clk_disable(cmdq->clock);
done:
/*
* The thread->task_busy_list empty means thread already disable. The
* cmdq_mbox_send_data() always reset thread which clear disable and
* suspend statue when first pkt send to channel, so there is no need
* to do any operation here, only unlock and leave.
*/
spin_unlock_irqrestore(&thread->chan->lock, flags);
}
static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout)