static void hci_ibs_tx_idle_timeout(unsigned long arg)
{
struct hci_uart *hu = (struct hci_uart *) arg;
struct ibs_struct *ibs = hu->priv;
unsigned long flags;
unsigned long vote_tx_sleep = 0;
BT_DBG("hu %p idle timeout in %lu state", hu, ibs->tx_ibs_state);
spin_lock_irqsave_nested(&ibs->hci_ibs_lock,
flags, SINGLE_DEPTH_NESTING);
switch (ibs->tx_ibs_state) {
default:
case HCI_IBS_TX_ASLEEP:
case HCI_IBS_TX_WAKING:
BT_ERR("spurrious timeout in tx state %ld", ibs->tx_ibs_state);
goto out;
case HCI_IBS_TX_AWAKE: /* TX_IDLE, go to SLEEP */
if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
BT_ERR("cannot send SLEEP to device");
goto out;
}
ibs->tx_ibs_state = HCI_IBS_TX_ASLEEP;
ibs->ibs_sent_slps++; /* debug */
vote_tx_sleep = 1;
break;
}
spin_unlock_irqrestore(&ibs->hci_ibs_lock, flags);
hci_uart_tx_wakeup(hu); /* run HCI tx handling unlocked */
if (!vote_tx_sleep)
return;
/* now that message queued to tty driver, vote for tty clocks off */
/* It is up to the tty driver to pend the clocks off until tx done. */
spin_lock_irqsave_nested(&ibs->hci_ibs_lock,
flags, SINGLE_DEPTH_NESTING);
/* QualComm baseLine update 1030 to 1040 begin */
/* vote off tx clock */
ibs->ibs_wq_state = HCI_IBS_WQ_TX_VOTE_OFF;
queue_work(ibs->workqueue, &ibs->ws_ibs);
/* QualComm baseLine update 1030 to 1040 end */
out:
spin_unlock_irqrestore(&ibs->hci_ibs_lock, flags);
}
static void hci_ibs_wake_retrans_timeout(unsigned long arg)
{
struct hci_uart *hu = (struct hci_uart *) arg;
struct ibs_struct *ibs = hu->priv;
unsigned long flags;
unsigned long retransmit = 0;
BT_DBG("hu %p wake retransmit timeout in %lu state",
hu, ibs->tx_ibs_state);
spin_lock_irqsave_nested(&ibs->hci_ibs_lock,
flags, SINGLE_DEPTH_NESTING);
switch (ibs->tx_ibs_state) {
default:
case HCI_IBS_TX_ASLEEP:
case HCI_IBS_TX_AWAKE:
BT_ERR("spurrious timeout tx state %ld", ibs->tx_ibs_state);
goto out;
case HCI_IBS_TX_WAKING: /* No WAKE_ACK, retransmit WAKE */
retransmit = 1;
if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {
BT_ERR("cannot acknowledge device wake up");
goto out;
}
ibs->ibs_sent_wakes++; /* debug */
mod_timer(&ibs->wake_retrans_timer, jiffies + wake_retrans);
break;
}
out:
spin_unlock_irqrestore(&ibs->hci_ibs_lock, flags);
if (retransmit)
hci_uart_tx_wakeup(hu);
}
static void hci_ibs_tx_idle_timeout(unsigned long arg)
{
struct hci_uart *hu = (struct hci_uart *) arg;
struct ibs_struct *ibs = hu->priv;
unsigned long flags;
BT_DBG("hu %p idle timeout in %lu state", hu, ibs->tx_ibs_state);
spin_lock_irqsave_nested(&ibs->hci_ibs_lock,
flags, SINGLE_DEPTH_NESTING);
switch (ibs->tx_ibs_state) {
default:
case HCI_IBS_TX_ASLEEP:
case HCI_IBS_TX_WAKING:
BT_ERR("spurrious timeout in tx state %ld", ibs->tx_ibs_state);
goto out;
case HCI_IBS_TX_AWAKE: /* TX_IDLE, go to SLEEP */
if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
BT_ERR("cannot send SLEEP to device");
goto out;
}
ibs->tx_ibs_state = HCI_IBS_TX_ASLEEP;
ibs->ibs_sent_slps++; /* debug */
break;
}
queue_work(ibs->workqueue, &ibs->ws_tx_vote_off);
out:
spin_unlock_irqrestore(&ibs->hci_ibs_lock, flags);
}
static void hci_ibs_tx_idle_timeout(unsigned long arg)
{
struct hci_uart *hu = (struct hci_uart *)arg;
struct qca_data *qca = hu->priv;
unsigned long flags;
BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state);
spin_lock_irqsave_nested(&qca->hci_ibs_lock,
flags, SINGLE_DEPTH_NESTING);
switch (qca->tx_ibs_state) {
case HCI_IBS_TX_AWAKE:
/* TX_IDLE, go to SLEEP */
if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
BT_ERR("Failed to send SLEEP to device");
break;
}
qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
qca->ibs_sent_slps++;
queue_work(qca->workqueue, &qca->ws_tx_vote_off);
break;
case HCI_IBS_TX_ASLEEP:
case HCI_IBS_TX_WAKING:
/* Fall through */
default:
BT_ERR("Spurrious timeout tx state %d", qca->tx_ibs_state);
break;
}
spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
}
static void hci_ibs_wake_retrans_timeout(unsigned long arg)
{
struct hci_uart *hu = (struct hci_uart *)arg;
struct qca_data *qca = hu->priv;
unsigned long flags, retrans_delay;
bool retransmit = false;
BT_DBG("hu %p wake retransmit timeout in %d state",
hu, qca->tx_ibs_state);
spin_lock_irqsave_nested(&qca->hci_ibs_lock,
flags, SINGLE_DEPTH_NESTING);
switch (qca->tx_ibs_state) {
case HCI_IBS_TX_WAKING:
/* No WAKE_ACK, retransmit WAKE */
retransmit = true;
if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {
BT_ERR("Failed to acknowledge device wake up");
break;
}
qca->ibs_sent_wakes++;
retrans_delay = msecs_to_jiffies(qca->wake_retrans);
mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
break;
case HCI_IBS_TX_ASLEEP:
case HCI_IBS_TX_AWAKE:
/* Fall through */
default:
BT_ERR("Spurrious timeout tx state %d", qca->tx_ibs_state);
break;
}
spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
if (retransmit)
hci_uart_tx_wakeup(hu);
}
/**
* put_io_context - put a reference of io_context
* @ioc: io_context to put
* @locked_q: request_queue the caller is holding queue_lock of (hint)
*
* Decrement reference count of @ioc and release it if the count reaches
* zero. If the caller is holding queue_lock of a queue, it can indicate
* that with @locked_q. This is an optimization hint and the caller is
* allowed to pass in %NULL even when it's holding a queue_lock.
*/
void put_io_context(struct io_context *ioc, struct request_queue *locked_q)
{
struct request_queue *last_q = locked_q;
unsigned long flags;
if (ioc == NULL)
return;
BUG_ON(atomic_long_read(&ioc->refcount) <= 0);
if (locked_q)
lockdep_assert_held(locked_q->queue_lock);
if (!atomic_long_dec_and_test(&ioc->refcount))
return;
/*
* Destroy @ioc. This is a bit messy because icq's are chained
* from both ioc and queue, and ioc->lock nests inside queue_lock.
* The inner ioc->lock should be held to walk our icq_list and then
* for each icq the outer matching queue_lock should be grabbed.
* ie. We need to do reverse-order double lock dancing.
*
* Another twist is that we are often called with one of the
* matching queue_locks held as indicated by @locked_q, which
* prevents performing double-lock dance for other queues.
*
* So, we do it in two stages. The fast path uses the queue_lock
* the caller is holding and, if other queues need to be accessed,
* uses trylock to avoid introducing locking dependency. This can
* handle most cases, especially if @ioc was performing IO on only
* single device.
*
* If trylock doesn't cut it, we defer to @ioc->release_work which
* can do all the double-locking dancing.
*/
spin_lock_irqsave_nested(&ioc->lock, flags,
ioc_release_depth(locked_q));
while (!hlist_empty(&ioc->icq_list)) {
struct io_cq *icq = hlist_entry(ioc->icq_list.first,
struct io_cq, ioc_node);
struct request_queue *this_q = icq->q;
if (this_q != last_q) {
if (last_q && last_q != locked_q)
spin_unlock(last_q->queue_lock);
last_q = NULL;
if (!spin_trylock(this_q->queue_lock))
break;
last_q = this_q;
continue;
}
ioc_exit_icq(icq);
}
if (last_q && last_q != locked_q)
spin_unlock(last_q->queue_lock);
spin_unlock_irqrestore(&ioc->lock, flags);
/* if no icq is left, we're done; otherwise, kick release_work */
if (hlist_empty(&ioc->icq_list))
kmem_cache_free(iocontext_cachep, ioc);
else
schedule_work(&ioc->release_work);
}
