Commit 59e90b2d authored by Roland Dreier's avatar Roland Dreier Committed by David S. Miller
Browse files

ibm_emac: Convert to use napi_struct independent of struct net_device 



Commit da3dedd9 ("[NET]: Make NAPI polling independent of struct
net_device objects.") changed the interface to NAPI polling.  Fix up
the ibm_newemac driver so that it works with this new interface.  This
is actually a nice cleanup because ibm_newemac is one of the drivers
that wants to have multiple NAPI structures for a single net_device.

Compile-tested only as I don't have a system that uses the ibm_newemac
driver.  This conversion the conversion for the ibm_emac driver that
was tested on real PowerPC 440SPe hardware.

Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 61ba5b3c

drivers/net/ibm_newemac/mal.c

+19 −36
Original line number Diff line number Diff line
@@ -235,10 +235,10 @@ static irqreturn_t mal_serr(int irq, void *dev_instance) 


static inline void mal_schedule_poll(struct mal_instance *mal)

{

	if (likely(netif_rx_schedule_prep(&mal->poll_dev))) {

	if (likely(napi_schedule_prep(&mal->napi))) {

		MAL_DBG2(mal, "schedule_poll" NL);

		mal_disable_eob_irq(mal);

		__netif_rx_schedule(&mal->poll_dev);

		__napi_schedule(&mal->napi);

	} else

		MAL_DBG2(mal, "already in poll" NL);

}
@@ -318,8 +318,7 @@ void mal_poll_disable(struct mal_instance *mal, struct mal_commac *commac) 
		msleep(1);



	/* Synchronize with the MAL NAPI poller. */

	while (test_bit(__LINK_STATE_RX_SCHED, &mal->poll_dev.state))

		msleep(1);

	napi_disable(&mal->napi);

}



void mal_poll_enable(struct mal_instance *mal, struct mal_commac *commac)
@@ -330,11 +329,11 @@ void mal_poll_enable(struct mal_instance *mal, struct mal_commac *commac) 
	// XXX might want to kick a poll now...

}



static int mal_poll(struct net_device *ndev, int *budget)

static int mal_poll(struct napi_struct *napi, int budget)

{

	struct mal_instance *mal = netdev_priv(ndev);

	struct mal_instance *mal = container_of(napi, struct mal_instance, napi);

	struct list_head *l;

	int rx_work_limit = min(ndev->quota, *budget), received = 0, done;

	int received = 0;

	unsigned long flags;



	MAL_DBG2(mal, "poll(%d) %d ->" NL, *budget,
@@ -358,26 +357,21 @@ static int mal_poll(struct net_device *ndev, int *budget) 
		int n;

		if (unlikely(test_bit(MAL_COMMAC_POLL_DISABLED, &mc->flags)))

			continue;

		n = mc->ops->poll_rx(mc->dev, rx_work_limit);

		n = mc->ops->poll_rx(mc->dev, budget);

		if (n) {

			received += n;

			rx_work_limit -= n;

			if (rx_work_limit <= 0) {

				done = 0;

				// XXX What if this is the last one ?

				goto more_work;

			}

			budget -= n;

			if (budget <= 0)

				goto more_work; // XXX What if this is the last one ?

		}

	}



	/* We need to disable IRQs to protect from RXDE IRQ here */

	spin_lock_irqsave(&mal->lock, flags);

	__netif_rx_complete(ndev);

	__napi_complete(napi);

	mal_enable_eob_irq(mal);

	spin_unlock_irqrestore(&mal->lock, flags);



	done = 1;



	/* Check for "rotting" packet(s) */

	list_for_each(l, &mal->poll_list) {

		struct mal_commac *mc =
@@ -387,12 +381,12 @@ static int mal_poll(struct net_device *ndev, int *budget) 
		if (unlikely(mc->ops->peek_rx(mc->dev) ||

			     test_bit(MAL_COMMAC_RX_STOPPED, &mc->flags))) {

			MAL_DBG2(mal, "rotting packet" NL);

			if (netif_rx_reschedule(ndev, received))

			if (napi_reschedule(napi))

				mal_disable_eob_irq(mal);

			else

				MAL_DBG2(mal, "already in poll list" NL);



			if (rx_work_limit > 0)

			if (budget > 0)

				goto again;

			else

				goto more_work;
@@ -401,13 +395,8 @@ static int mal_poll(struct net_device *ndev, int *budget) 
	}



 more_work:

	ndev->quota -= received;

	*budget -= received;



	MAL_DBG2(mal, "poll() %d <- %d" NL, *budget,

		 done ? 0 : 1);



	return done ? 0 : 1;

	MAL_DBG2(mal, "poll() %d <- %d" NL, budget, received);

	return received;

}



static void mal_reset(struct mal_instance *mal)
@@ -538,11 +527,8 @@ static int __devinit mal_probe(struct of_device *ofdev, 
	}



	INIT_LIST_HEAD(&mal->poll_list);

	set_bit(__LINK_STATE_START, &mal->poll_dev.state);

	mal->poll_dev.weight = CONFIG_IBM_NEW_EMAC_POLL_WEIGHT;

	mal->poll_dev.poll = mal_poll;

	mal->poll_dev.priv = mal;

	atomic_set(&mal->poll_dev.refcnt, 1);

	mal->napi.weight = CONFIG_IBM_NEW_EMAC_POLL_WEIGHT;

	mal->napi.poll = mal_poll;

	INIT_LIST_HEAD(&mal->list);

	spin_lock_init(&mal->lock);
@@ -653,11 +639,8 @@ static int __devexit mal_remove(struct of_device *ofdev) 


	MAL_DBG(mal, "remove" NL);



	/* Syncronize with scheduled polling,

	   stolen from net/core/dev.c:dev_close()

	 */

	clear_bit(__LINK_STATE_START, &mal->poll_dev.state);

	netif_poll_disable(&mal->poll_dev);

	/* Synchronize with scheduled polling */

	napi_disable(&mal->napi);



	if (!list_empty(&mal->list)) {

		/* This is *very* bad */

drivers/net/ibm_newemac/mal.h

+1 −1
Original line number Diff line number Diff line
@@ -197,7 +197,7 @@ struct mal_instance { 
	int			serr_irq;	/* MAL System Error IRQ    */



	struct list_head	poll_list;

	struct net_device	poll_dev;

	struct napi_struct	napi;



	struct list_head	list;

	u32			tx_chan_mask;

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