ALSA: mixart: Use nonatomic PCM ops
Like the previous patch for VX boards, miXart device driver can be
also rewritten to use nonatomic PCM ops. Simply spinlocks are
replaced with mutex, the tasklet code is merged into the threaded irq
handler. Also, now mgr->msg_mutex is superfluous, so merged to
msg_lock.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/mixart/mixart_core.c b/sound/pci/mixart/mixart_core.c
index 84f6745..fe80313 100644
--- a/sound/pci/mixart/mixart_core.c
+++ b/sound/pci/mixart/mixart_core.c
@@ -76,7 +76,6 @@
static int get_msg(struct mixart_mgr *mgr, struct mixart_msg *resp,
u32 msg_frame_address )
{
- unsigned long flags;
u32 headptr;
u32 size;
int err;
@@ -84,7 +83,7 @@
unsigned int i;
#endif
- spin_lock_irqsave(&mgr->msg_lock, flags);
+ mutex_lock(&mgr->msg_lock);
err = 0;
/* copy message descriptor from miXart to driver */
@@ -133,7 +132,7 @@
writel_be(headptr, MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
_clean_exit:
- spin_unlock_irqrestore(&mgr->msg_lock, flags);
+ mutex_unlock(&mgr->msg_lock);
return err;
}
@@ -243,28 +242,24 @@
wait_queue_t wait;
long timeout;
- mutex_lock(&mgr->msg_mutex);
-
init_waitqueue_entry(&wait, current);
- spin_lock_irq(&mgr->msg_lock);
+ mutex_lock(&mgr->msg_lock);
/* send the message */
err = send_msg(mgr, request, max_resp_size, 1, &msg_frame); /* send and mark the answer pending */
if (err) {
- spin_unlock_irq(&mgr->msg_lock);
- mutex_unlock(&mgr->msg_mutex);
+ mutex_unlock(&mgr->msg_lock);
return err;
}
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&mgr->msg_sleep, &wait);
- spin_unlock_irq(&mgr->msg_lock);
+ mutex_unlock(&mgr->msg_lock);
timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
remove_wait_queue(&mgr->msg_sleep, &wait);
if (! timeout) {
/* error - no ack */
- mutex_unlock(&mgr->msg_mutex);
dev_err(&mgr->pci->dev,
"error: no response on msg %x\n", msg_frame);
return -EIO;
@@ -281,7 +276,6 @@
if( request->message_id != resp.message_id )
dev_err(&mgr->pci->dev, "RESPONSE ERROR!\n");
- mutex_unlock(&mgr->msg_mutex);
return err;
}
@@ -300,34 +294,29 @@
if (snd_BUG_ON(notif_event & MSG_CANCEL_NOTIFY_MASK))
return -EINVAL;
- mutex_lock(&mgr->msg_mutex);
-
init_waitqueue_entry(&wait, current);
- spin_lock_irq(&mgr->msg_lock);
+ mutex_lock(&mgr->msg_lock);
/* send the message */
err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 1, ¬if_event); /* send and mark the notification event pending */
if(err) {
- spin_unlock_irq(&mgr->msg_lock);
- mutex_unlock(&mgr->msg_mutex);
+ mutex_unlock(&mgr->msg_lock);
return err;
}
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&mgr->msg_sleep, &wait);
- spin_unlock_irq(&mgr->msg_lock);
+ mutex_unlock(&mgr->msg_lock);
timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
remove_wait_queue(&mgr->msg_sleep, &wait);
if (! timeout) {
/* error - no ack */
- mutex_unlock(&mgr->msg_mutex);
dev_err(&mgr->pci->dev,
"error: notification %x not received\n", notif_event);
return -EIO;
}
- mutex_unlock(&mgr->msg_mutex);
return 0;
}
@@ -335,13 +324,12 @@
int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request)
{
u32 message_frame;
- unsigned long flags;
int err;
/* just send the message (do not mark it as a pending one) */
- spin_lock_irqsave(&mgr->msg_lock, flags);
+ mutex_lock(&mgr->msg_lock);
err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 0, &message_frame);
- spin_unlock_irqrestore(&mgr->msg_lock, flags);
+ mutex_unlock(&mgr->msg_lock);
/* the answer will be handled by snd_struct mixart_msgasklet() */
atomic_inc(&mgr->msg_processed);
@@ -350,19 +338,16 @@
}
-/* common buffer of tasklet and interrupt to send/receive messages */
+/* common buffer of interrupt to send/receive messages */
static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4];
-void snd_mixart_msg_tasklet(unsigned long arg)
+static void snd_mixart_process_msg(struct mixart_mgr *mgr)
{
- struct mixart_mgr *mgr = ( struct mixart_mgr*)(arg);
struct mixart_msg resp;
u32 msg, addr, type;
int err;
- spin_lock(&mgr->lock);
-
while (mgr->msg_fifo_readptr != mgr->msg_fifo_writeptr) {
msg = mgr->msg_fifo[mgr->msg_fifo_readptr];
mgr->msg_fifo_readptr++;
@@ -381,7 +366,7 @@
err = get_msg(mgr, &resp, addr);
if( err < 0 ) {
dev_err(&mgr->pci->dev,
- "tasklet: error(%d) reading mf %x\n",
+ "error(%d) reading mf %x\n",
err, msg);
break;
}
@@ -393,12 +378,12 @@
case MSG_STREAM_STOP_OUTPUT_STAGE_PACKET:
if(mixart_msg_data[0])
dev_err(&mgr->pci->dev,
- "tasklet : error MSG_STREAM_ST***_***PUT_STAGE_PACKET status=%x\n",
+ "error MSG_STREAM_ST***_***PUT_STAGE_PACKET status=%x\n",
mixart_msg_data[0]);
break;
default:
dev_dbg(&mgr->pci->dev,
- "tasklet received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n",
+ "received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n",
msg, resp.message_id, resp.uid.object_id, resp.uid.desc, resp.size);
break;
}
@@ -409,7 +394,7 @@
/* get_msg() necessary */
default:
dev_err(&mgr->pci->dev,
- "tasklet doesn't know what to do with message %x\n",
+ "doesn't know what to do with message %x\n",
msg);
} /* switch type */
@@ -417,26 +402,17 @@
atomic_dec(&mgr->msg_processed);
} /* while there is a msg in fifo */
-
- spin_unlock(&mgr->lock);
}
irqreturn_t snd_mixart_interrupt(int irq, void *dev_id)
{
struct mixart_mgr *mgr = dev_id;
- int err;
- struct mixart_msg resp;
-
- u32 msg;
u32 it_reg;
- spin_lock(&mgr->lock);
-
it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET));
if( !(it_reg & MIXART_OIDI) ) {
/* this device did not cause the interrupt */
- spin_unlock(&mgr->lock);
return IRQ_NONE;
}
@@ -450,6 +426,17 @@
/* clear interrupt */
writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) );
+ return IRQ_WAKE_THREAD;
+}
+
+irqreturn_t snd_mixart_threaded_irq(int irq, void *dev_id)
+{
+ struct mixart_mgr *mgr = dev_id;
+ int err;
+ struct mixart_msg resp;
+ u32 msg;
+
+ mutex_lock(&mgr->lock);
/* process interrupt */
while (retrieve_msg_frame(mgr, &msg)) {
@@ -518,9 +505,9 @@
stream->buf_period_frag = (u32)( sample_count - stream->abs_period_elapsed );
if(elapsed) {
- spin_unlock(&mgr->lock);
+ mutex_unlock(&mgr->lock);
snd_pcm_period_elapsed(stream->substream);
- spin_lock(&mgr->lock);
+ mutex_lock(&mgr->lock);
}
}
}
@@ -556,7 +543,7 @@
/* no break, continue ! */
case MSG_TYPE_ANSWER:
/* answer or notification to a message we are waiting for*/
- spin_lock(&mgr->msg_lock);
+ mutex_lock(&mgr->msg_lock);
if( (msg & ~MSG_TYPE_MASK) == mgr->pending_event ) {
wake_up(&mgr->msg_sleep);
mgr->pending_event = 0;
@@ -566,9 +553,9 @@
mgr->msg_fifo[mgr->msg_fifo_writeptr] = msg;
mgr->msg_fifo_writeptr++;
mgr->msg_fifo_writeptr %= MSG_FIFO_SIZE;
- tasklet_schedule(&mgr->msg_taskq);
+ snd_mixart_process_msg(mgr);
}
- spin_unlock(&mgr->msg_lock);
+ mutex_unlock(&mgr->msg_lock);
break;
case MSG_TYPE_REQUEST:
default:
@@ -582,7 +569,7 @@
/* allow interrupt again */
writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
- spin_unlock(&mgr->lock);
+ mutex_unlock(&mgr->lock);
return IRQ_HANDLED;
}