[linux.git] / drivers / net / rionet.c

/*
 * rionet - Ethernet driver over RapidIO messaging services
 *
 * Copyright 2005 MontaVista Software, Inc.
 * Matt Porter <[email protected]>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/rio.h>
#include <linux/rio_drv.h>
#include <linux/slab.h>
#include <linux/rio_ids.h>

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/crc32.h>
#include <linux/ethtool.h>

#define DRV_NAME        "rionet"
#define DRV_VERSION     "0.3"
#define DRV_AUTHOR      "Matt Porter <[email protected]>"
#define DRV_DESC        "Ethernet over RapidIO"

MODULE_AUTHOR(DRV_AUTHOR);
MODULE_DESCRIPTION(DRV_DESC);
MODULE_LICENSE("GPL");

#define RIONET_DEFAULT_MSGLEVEL \
			(NETIF_MSG_DRV          | \
			 NETIF_MSG_LINK         | \
			 NETIF_MSG_RX_ERR       | \
			 NETIF_MSG_TX_ERR)

#define RIONET_DOORBELL_JOIN	0x1000
#define RIONET_DOORBELL_LEAVE	0x1001

#define RIONET_MAILBOX		0

#define RIONET_TX_RING_SIZE	CONFIG_RIONET_TX_SIZE
#define RIONET_RX_RING_SIZE	CONFIG_RIONET_RX_SIZE
#define RIONET_MAX_NETS		8

struct rionet_private {
	struct rio_mport *mport;
	struct sk_buff *rx_skb[RIONET_RX_RING_SIZE];
	struct sk_buff *tx_skb[RIONET_TX_RING_SIZE];
	int rx_slot;
	int tx_slot;
	int tx_cnt;
	int ack_slot;
	spinlock_t lock;
	spinlock_t tx_lock;
	u32 msg_enable;
};

struct rionet_peer {
	struct list_head node;
	struct rio_dev *rdev;
	struct resource *res;
};

struct rionet_net {
	struct net_device *ndev;
	struct list_head peers;
	struct rio_dev **active;
	int nact;	/* number of active peers */
};

static struct rionet_net nets[RIONET_MAX_NETS];

#define is_rionet_capable(src_ops, dst_ops)			\
			((src_ops & RIO_SRC_OPS_DATA_MSG) &&	\
			 (dst_ops & RIO_DST_OPS_DATA_MSG) &&	\
			 (src_ops & RIO_SRC_OPS_DOORBELL) &&	\
			 (dst_ops & RIO_DST_OPS_DOORBELL))
#define dev_rionet_capable(dev) \
	is_rionet_capable(dev->src_ops, dev->dst_ops)

#define RIONET_MAC_MATCH(x)	(!memcmp((x), "\00\01\00\01", 4))
#define RIONET_GET_DESTID(x)	((*((u8 *)x + 4) << 8) | *((u8 *)x + 5))

static int rionet_rx_clean(struct net_device *ndev)
{
	int i;
	int error = 0;
	struct rionet_private *rnet = netdev_priv(ndev);
	void *data;

	i = rnet->rx_slot;

	do {
		if (!rnet->rx_skb[i])
			continue;

		if (!(data = rio_get_inb_message(rnet->mport, RIONET_MAILBOX)))
			break;

		rnet->rx_skb[i]->data = data;
		skb_put(rnet->rx_skb[i], RIO_MAX_MSG_SIZE);
		rnet->rx_skb[i]->protocol =
		    eth_type_trans(rnet->rx_skb[i], ndev);
		error = netif_rx(rnet->rx_skb[i]);

		if (error == NET_RX_DROP) {
			ndev->stats.rx_dropped++;
		} else {
			ndev->stats.rx_packets++;
			ndev->stats.rx_bytes += RIO_MAX_MSG_SIZE;
		}

	} while ((i = (i + 1) % RIONET_RX_RING_SIZE) != rnet->rx_slot);

	return i;
}

static void rionet_rx_fill(struct net_device *ndev, int end)
{
	int i;
	struct rionet_private *rnet = netdev_priv(ndev);

	i = rnet->rx_slot;
	do {
		rnet->rx_skb[i] = dev_alloc_skb(RIO_MAX_MSG_SIZE);

		if (!rnet->rx_skb[i])
			break;

		rio_add_inb_buffer(rnet->mport, RIONET_MAILBOX,
				   rnet->rx_skb[i]->data);
	} while ((i = (i + 1) % RIONET_RX_RING_SIZE) != end);

	rnet->rx_slot = i;
}

static int rionet_queue_tx_msg(struct sk_buff *skb, struct net_device *ndev,
			       struct rio_dev *rdev)
{
	struct rionet_private *rnet = netdev_priv(ndev);

	rio_add_outb_message(rnet->mport, rdev, 0, skb->data, skb->len);
	rnet->tx_skb[rnet->tx_slot] = skb;

	ndev->stats.tx_packets++;
	ndev->stats.tx_bytes += skb->len;

	if (++rnet->tx_cnt == RIONET_TX_RING_SIZE)
		netif_stop_queue(ndev);

	++rnet->tx_slot;
	rnet->tx_slot &= (RIONET_TX_RING_SIZE - 1);

	if (netif_msg_tx_queued(rnet))
		printk(KERN_INFO "%s: queued skb len %8.8x\n", DRV_NAME,
		       skb->len);

	return 0;
}

static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
	int i;
	struct rionet_private *rnet = netdev_priv(ndev);
	struct ethhdr *eth = (struct ethhdr *)skb->data;
	u16 destid;
	unsigned long flags;
	int add_num = 1;

	local_irq_save(flags);
	if (!spin_trylock(&rnet->tx_lock)) {
		local_irq_restore(flags);
		return NETDEV_TX_LOCKED;
	}

	if (is_multicast_ether_addr(eth->h_dest))
		add_num = nets[rnet->mport->id].nact;

	if ((rnet->tx_cnt + add_num) > RIONET_TX_RING_SIZE) {
		netif_stop_queue(ndev);
		spin_unlock_irqrestore(&rnet->tx_lock, flags);
		printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n",
		       ndev->name);
		return NETDEV_TX_BUSY;
	}

	if (is_multicast_ether_addr(eth->h_dest)) {
		int count = 0;

		for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size);
				i++)
			if (nets[rnet->mport->id].active[i]) {
				rionet_queue_tx_msg(skb, ndev,
					nets[rnet->mport->id].active[i]);
				if (count)
					atomic_inc(&skb->users);
				count++;
			}
	} else if (RIONET_MAC_MATCH(eth->h_dest)) {
		destid = RIONET_GET_DESTID(eth->h_dest);
		if (nets[rnet->mport->id].active[destid])
			rionet_queue_tx_msg(skb, ndev,
					nets[rnet->mport->id].active[destid]);
		else {
			/*
			 * If the target device was removed from the list of
			 * active peers but we still have TX packets targeting
			 * it just report sending a packet to the target
			 * (without actual packet transfer).
			 */
			dev_kfree_skb_any(skb);
			ndev->stats.tx_packets++;
			ndev->stats.tx_bytes += skb->len;
		}
	}

	spin_unlock_irqrestore(&rnet->tx_lock, flags);

	return NETDEV_TX_OK;
}

static void rionet_dbell_event(struct rio_mport *mport, void *dev_id, u16 sid, u16 tid,
			       u16 info)
{
	struct net_device *ndev = dev_id;
	struct rionet_private *rnet = netdev_priv(ndev);
	struct rionet_peer *peer;

	if (netif_msg_intr(rnet))
		printk(KERN_INFO "%s: doorbell sid %4.4x tid %4.4x info %4.4x",
		       DRV_NAME, sid, tid, info);
	if (info == RIONET_DOORBELL_JOIN) {
		if (!nets[rnet->mport->id].active[sid]) {
			list_for_each_entry(peer,
					   &nets[rnet->mport->id].peers, node) {
				if (peer->rdev->destid == sid) {
					nets[rnet->mport->id].active[sid] =
								peer->rdev;
					nets[rnet->mport->id].nact++;
				}
			}
			rio_mport_send_doorbell(mport, sid,
						RIONET_DOORBELL_JOIN);
		}
	} else if (info == RIONET_DOORBELL_LEAVE) {
		nets[rnet->mport->id].active[sid] = NULL;
		nets[rnet->mport->id].nact--;
	} else {
		if (netif_msg_intr(rnet))
			printk(KERN_WARNING "%s: unhandled doorbell\n",
			       DRV_NAME);
	}
}

static void rionet_inb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot)
{
	int n;
	struct net_device *ndev = dev_id;
	struct rionet_private *rnet = netdev_priv(ndev);

	if (netif_msg_intr(rnet))
		printk(KERN_INFO "%s: inbound message event, mbox %d slot %d\n",
		       DRV_NAME, mbox, slot);

	spin_lock(&rnet->lock);
	if ((n = rionet_rx_clean(ndev)) != rnet->rx_slot)
		rionet_rx_fill(ndev, n);
	spin_unlock(&rnet->lock);
}

static void rionet_outb_msg_event(struct rio_mport *mport, void *dev_id, int mbox, int slot)
{
	struct net_device *ndev = dev_id;
	struct rionet_private *rnet = netdev_priv(ndev);

	spin_lock(&rnet->lock);

	if (netif_msg_intr(rnet))
		printk(KERN_INFO
		       "%s: outbound message event, mbox %d slot %d\n",
		       DRV_NAME, mbox, slot);

	while (rnet->tx_cnt && (rnet->ack_slot != slot)) {
		/* dma unmap single */
		dev_kfree_skb_irq(rnet->tx_skb[rnet->ack_slot]);
		rnet->tx_skb[rnet->ack_slot] = NULL;
		++rnet->ack_slot;
		rnet->ack_slot &= (RIONET_TX_RING_SIZE - 1);
		rnet->tx_cnt--;
	}

	if (rnet->tx_cnt < RIONET_TX_RING_SIZE)
		netif_wake_queue(ndev);

	spin_unlock(&rnet->lock);
}

static int rionet_open(struct net_device *ndev)
{
	int i, rc = 0;
	struct rionet_peer *peer, *tmp;
	struct rionet_private *rnet = netdev_priv(ndev);

	if (netif_msg_ifup(rnet))
		printk(KERN_INFO "%s: open\n", DRV_NAME);

	if ((rc = rio_request_inb_dbell(rnet->mport,
					(void *)ndev,
					RIONET_DOORBELL_JOIN,
					RIONET_DOORBELL_LEAVE,
					rionet_dbell_event)) < 0)
		goto out;

	if ((rc = rio_request_inb_mbox(rnet->mport,
				       (void *)ndev,
				       RIONET_MAILBOX,
				       RIONET_RX_RING_SIZE,
				       rionet_inb_msg_event)) < 0)
		goto out;

	if ((rc = rio_request_outb_mbox(rnet->mport,
					(void *)ndev,
					RIONET_MAILBOX,
					RIONET_TX_RING_SIZE,
					rionet_outb_msg_event)) < 0)
		goto out;

	/* Initialize inbound message ring */
	for (i = 0; i < RIONET_RX_RING_SIZE; i++)
		rnet->rx_skb[i] = NULL;
	rnet->rx_slot = 0;
	rionet_rx_fill(ndev, 0);

	rnet->tx_slot = 0;
	rnet->tx_cnt = 0;
	rnet->ack_slot = 0;

	netif_carrier_on(ndev);
	netif_start_queue(ndev);

	list_for_each_entry_safe(peer, tmp,
				 &nets[rnet->mport->id].peers, node) {
		if (!(peer->res = rio_request_outb_dbell(peer->rdev,
							 RIONET_DOORBELL_JOIN,
							 RIONET_DOORBELL_LEAVE)))
		{
			printk(KERN_ERR "%s: error requesting doorbells\n",
			       DRV_NAME);
			continue;
		}

		/* Send a join message */
		rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN);
	}

      out:
	return rc;
}

static int rionet_close(struct net_device *ndev)
{
	struct rionet_private *rnet = netdev_priv(ndev);
	struct rionet_peer *peer, *tmp;
	int i;

	if (netif_msg_ifup(rnet))
		printk(KERN_INFO "%s: close %s\n", DRV_NAME, ndev->name);

	netif_stop_queue(ndev);
	netif_carrier_off(ndev);

	for (i = 0; i < RIONET_RX_RING_SIZE; i++)
		kfree_skb(rnet->rx_skb[i]);

	list_for_each_entry_safe(peer, tmp,
				 &nets[rnet->mport->id].peers, node) {
		if (nets[rnet->mport->id].active[peer->rdev->destid]) {
			rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE);
			nets[rnet->mport->id].active[peer->rdev->destid] = NULL;
		}
		rio_release_outb_dbell(peer->rdev, peer->res);
	}

	rio_release_inb_dbell(rnet->mport, RIONET_DOORBELL_JOIN,
			      RIONET_DOORBELL_LEAVE);
	rio_release_inb_mbox(rnet->mport, RIONET_MAILBOX);
	rio_release_outb_mbox(rnet->mport, RIONET_MAILBOX);

	return 0;
}

static int rionet_remove_dev(struct device *dev, struct subsys_interface *sif)
{
	struct rio_dev *rdev = to_rio_dev(dev);
	unsigned char netid = rdev->net->hport->id;
	struct rionet_peer *peer, *tmp;

	if (dev_rionet_capable(rdev)) {
		list_for_each_entry_safe(peer, tmp, &nets[netid].peers, node) {
			if (peer->rdev == rdev) {
				if (nets[netid].active[rdev->destid]) {
					nets[netid].active[rdev->destid] = NULL;
					nets[netid].nact--;
				}

				list_del(&peer->node);
				kfree(peer);
				break;
			}
		}
	}

	return 0;
}

static void rionet_get_drvinfo(struct net_device *ndev,
			       struct ethtool_drvinfo *info)
{
	struct rionet_private *rnet = netdev_priv(ndev);

	strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
	strlcpy(info->version, DRV_VERSION, sizeof(info->version));
	strlcpy(info->fw_version, "n/a", sizeof(info->fw_version));
	strlcpy(info->bus_info, rnet->mport->name, sizeof(info->bus_info));
}

static u32 rionet_get_msglevel(struct net_device *ndev)
{
	struct rionet_private *rnet = netdev_priv(ndev);

	return rnet->msg_enable;
}

static void rionet_set_msglevel(struct net_device *ndev, u32 value)
{
	struct rionet_private *rnet = netdev_priv(ndev);

	rnet->msg_enable = value;
}

static const struct ethtool_ops rionet_ethtool_ops = {
	.get_drvinfo = rionet_get_drvinfo,
	.get_msglevel = rionet_get_msglevel,
	.set_msglevel = rionet_set_msglevel,
	.get_link = ethtool_op_get_link,
};

static const struct net_device_ops rionet_netdev_ops = {
	.ndo_open		= rionet_open,
	.ndo_stop		= rionet_close,
	.ndo_start_xmit		= rionet_start_xmit,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= eth_mac_addr,
};

static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev)
{
	int rc = 0;
	struct rionet_private *rnet;
	u16 device_id;
	const size_t rionet_active_bytes = sizeof(void *) *
				RIO_MAX_ROUTE_ENTRIES(mport->sys_size);

	nets[mport->id].active = (struct rio_dev **)__get_free_pages(GFP_KERNEL,
						get_order(rionet_active_bytes));
	if (!nets[mport->id].active) {
		rc = -ENOMEM;
		goto out;
	}
	memset((void *)nets[mport->id].active, 0, rionet_active_bytes);

	/* Set up private area */
	rnet = netdev_priv(ndev);
	rnet->mport = mport;

	/* Set the default MAC address */
	device_id = rio_local_get_device_id(mport);
	ndev->dev_addr[0] = 0x00;
	ndev->dev_addr[1] = 0x01;
	ndev->dev_addr[2] = 0x00;
	ndev->dev_addr[3] = 0x01;
	ndev->dev_addr[4] = device_id >> 8;
	ndev->dev_addr[5] = device_id & 0xff;

	ndev->netdev_ops = &rionet_netdev_ops;
	ndev->mtu = RIO_MAX_MSG_SIZE - 14;
	ndev->features = NETIF_F_LLTX;
	SET_NETDEV_DEV(ndev, &mport->dev);
	SET_ETHTOOL_OPS(ndev, &rionet_ethtool_ops);

	spin_lock_init(&rnet->lock);
	spin_lock_init(&rnet->tx_lock);

	rnet->msg_enable = RIONET_DEFAULT_MSGLEVEL;

	rc = register_netdev(ndev);
	if (rc != 0)
		goto out;

	printk(KERN_INFO "%s: %s %s Version %s, MAC %pM, %s\n",
	       ndev->name,
	       DRV_NAME,
	       DRV_DESC,
	       DRV_VERSION,
	       ndev->dev_addr,
	       mport->name);

      out:
	return rc;
}

static unsigned long net_table[RIONET_MAX_NETS/sizeof(unsigned long) + 1];

static int rionet_add_dev(struct device *dev, struct subsys_interface *sif)
{
	int rc = -ENODEV;
	u32 lsrc_ops, ldst_ops;
	struct rionet_peer *peer;
	struct net_device *ndev = NULL;
	struct rio_dev *rdev = to_rio_dev(dev);
	unsigned char netid = rdev->net->hport->id;
	int oldnet;

	if (netid >= RIONET_MAX_NETS)
		return rc;

	oldnet = test_and_set_bit(netid, net_table);

	/*
	 * If first time through this net, make sure local device is rionet
	 * capable and setup netdev (this step will be skipped in later probes
	 * on the same net).
	 */
	if (!oldnet) {
		rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR,
					 &lsrc_ops);
		rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR,
					 &ldst_ops);
		if (!is_rionet_capable(lsrc_ops, ldst_ops)) {
			printk(KERN_ERR
			       "%s: local device %s is not network capable\n",
			       DRV_NAME, rdev->net->hport->name);
			goto out;
		}

		/* Allocate our net_device structure */
		ndev = alloc_etherdev(sizeof(struct rionet_private));
		if (ndev == NULL) {
			rc = -ENOMEM;
			goto out;
		}
		nets[netid].ndev = ndev;
		rc = rionet_setup_netdev(rdev->net->hport, ndev);
		if (rc) {
			printk(KERN_ERR "%s: failed to setup netdev (rc=%d)\n",
			       DRV_NAME, rc);
			goto out;
		}

		INIT_LIST_HEAD(&nets[netid].peers);
		nets[netid].nact = 0;
	} else if (nets[netid].ndev == NULL)
		goto out;

	/*
	 * If the remote device has mailbox/doorbell capabilities,
	 * add it to the peer list.
	 */
	if (dev_rionet_capable(rdev)) {
		if (!(peer = kmalloc(sizeof(struct rionet_peer), GFP_KERNEL))) {
			rc = -ENOMEM;
			goto out;
		}
		peer->rdev = rdev;
		list_add_tail(&peer->node, &nets[netid].peers);
	}

	return 0;
out:
	return rc;
}

#ifdef MODULE
static struct rio_device_id rionet_id_table[] = {
	{RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)},
	{ 0, }	/* terminate list */
};

MODULE_DEVICE_TABLE(rapidio, rionet_id_table);
#endif

static struct subsys_interface rionet_interface = {
	.name		= "rionet",
	.subsys		= &rio_bus_type,
	.add_dev	= rionet_add_dev,
	.remove_dev	= rionet_remove_dev,
};

static int __init rionet_init(void)
{
	return subsys_interface_register(&rionet_interface);
}

static void __exit rionet_exit(void)
{
	struct rionet_private *rnet;
	struct net_device *ndev;
	struct rionet_peer *peer, *tmp;
	int i;

	for (i = 0; i < RIONET_MAX_NETS; i++) {
		if (nets[i].ndev != NULL) {
			ndev = nets[i].ndev;
			rnet = netdev_priv(ndev);
			unregister_netdev(ndev);

			list_for_each_entry_safe(peer,
						 tmp, &nets[i].peers, node) {
				list_del(&peer->node);
				kfree(peer);
			}

			free_pages((unsigned long)nets[i].active,
				 get_order(sizeof(void *) *
				 RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size)));
			nets[i].active = NULL;

			free_netdev(ndev);
		}
	}

	subsys_interface_unregister(&rionet_interface);
}

late_initcall(rionet_init);
module_exit(rionet_exit);
Commit	Line	Data
f89efd52 MP	1	/*
	2	* rionet - Ethernet driver over RapidIO messaging services
	3	*
	4	* Copyright 2005 MontaVista Software, Inc.
	5	* Matt Porter <[email protected]>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/kernel.h>
	15	#include <linux/dma-mapping.h>
	16	#include <linux/delay.h>
	17	#include <linux/rio.h>
	18	#include <linux/rio_drv.h>
5a0e3ad6	19	#include <linux/slab.h>
f89efd52 MP	20	#include <linux/rio_ids.h>
	21
	22	#include <linux/netdevice.h>
	23	#include <linux/etherdevice.h>
	24	#include <linux/skbuff.h>
	25	#include <linux/crc32.h>
	26	#include <linux/ethtool.h>
	27
	28	#define DRV_NAME "rionet"
2fb717ec	29	#define DRV_VERSION "0.3"
f89efd52 MP	30	#define DRV_AUTHOR "Matt Porter <[email protected]>"
	31	#define DRV_DESC "Ethernet over RapidIO"
	32
	33	MODULE_AUTHOR(DRV_AUTHOR);
	34	MODULE_DESCRIPTION(DRV_DESC);
	35	MODULE_LICENSE("GPL");
	36
	37	#define RIONET_DEFAULT_MSGLEVEL \
	38	(NETIF_MSG_DRV \| \
	39	NETIF_MSG_LINK \| \
	40	NETIF_MSG_RX_ERR \| \
	41	NETIF_MSG_TX_ERR)
	42
	43	#define RIONET_DOORBELL_JOIN 0x1000
	44	#define RIONET_DOORBELL_LEAVE 0x1001
	45
	46	#define RIONET_MAILBOX 0
	47
	48	#define RIONET_TX_RING_SIZE CONFIG_RIONET_TX_SIZE
	49	#define RIONET_RX_RING_SIZE CONFIG_RIONET_RX_SIZE
2fb717ec	50	#define RIONET_MAX_NETS 8
f89efd52 MP	51
	52	struct rionet_private {
	53	struct rio_mport *mport;
	54	struct sk_buff *rx_skb[RIONET_RX_RING_SIZE];
	55	struct sk_buff *tx_skb[RIONET_TX_RING_SIZE];
f89efd52 MP	56	int rx_slot;
	57	int tx_slot;
	58	int tx_cnt;
	59	int ack_slot;
	60	spinlock_t lock;
	61	spinlock_t tx_lock;
	62	u32 msg_enable;
	63	};
	64
	65	struct rionet_peer {
	66	struct list_head node;
	67	struct rio_dev *rdev;
	68	struct resource *res;
	69	};
	70
2fb717ec AB	71	struct rionet_net {
	72	struct net_device *ndev;
	73	struct list_head peers;
	74	struct rio_dev **active;
	75	int nact; /* number of active peers */
	76	};
f89efd52	77
2fb717ec	78	static struct rionet_net nets[RIONET_MAX_NETS];
f89efd52	79
284fb68d AB	80	#define is_rionet_capable(src_ops, dst_ops) \
	81	((src_ops & RIO_SRC_OPS_DATA_MSG) && \
	82	(dst_ops & RIO_DST_OPS_DATA_MSG) && \
f89efd52 MP	83	(src_ops & RIO_SRC_OPS_DOORBELL) && \
	84	(dst_ops & RIO_DST_OPS_DOORBELL))
	85	#define dev_rionet_capable(dev) \
284fb68d	86	is_rionet_capable(dev->src_ops, dev->dst_ops)
f89efd52	87
e0c87bd9 AB	88	#define RIONET_MAC_MATCH(x) (!memcmp((x), "\00\01\00\01", 4))
e0c87bd9 AB	89	#define RIONET_GET_DESTID(x) ((((u8 )x + 4) << 8) \| ((u8 )x + 5))
f89efd52	90
f89efd52 MP	91	static int rionet_rx_clean(struct net_device *ndev)
	92	{
	93	int i;
	94	int error = 0;
4cf1653a	95	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 MP	96	void *data;
	97
	98	i = rnet->rx_slot;
	99
	100	do {
	101	if (!rnet->rx_skb[i])
	102	continue;
	103
	104	if (!(data = rio_get_inb_message(rnet->mport, RIONET_MAILBOX)))
	105	break;
	106
	107	rnet->rx_skb[i]->data = data;
	108	skb_put(rnet->rx_skb[i], RIO_MAX_MSG_SIZE);
f89efd52 MP	109	rnet->rx_skb[i]->protocol =
	110	eth_type_trans(rnet->rx_skb[i], ndev);
	111	error = netif_rx(rnet->rx_skb[i]);
	112
	113	if (error == NET_RX_DROP) {
09f75cd7	114	ndev->stats.rx_dropped++;
f89efd52	115	} else {
09f75cd7 JG	116	ndev->stats.rx_packets++;
09f75cd7 JG	117	ndev->stats.rx_bytes += RIO_MAX_MSG_SIZE;
f89efd52 MP	118	}
	119
	120	} while ((i = (i + 1) % RIONET_RX_RING_SIZE) != rnet->rx_slot);
	121
	122	return i;
	123	}
	124
	125	static void rionet_rx_fill(struct net_device *ndev, int end)
	126	{
	127	int i;
4cf1653a	128	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 MP	129
	130	i = rnet->rx_slot;
	131	do {
	132	rnet->rx_skb[i] = dev_alloc_skb(RIO_MAX_MSG_SIZE);
	133
	134	if (!rnet->rx_skb[i])
	135	break;
	136
	137	rio_add_inb_buffer(rnet->mport, RIONET_MAILBOX,
	138	rnet->rx_skb[i]->data);
	139	} while ((i = (i + 1) % RIONET_RX_RING_SIZE) != end);
	140
	141	rnet->rx_slot = i;
	142	}
	143
	144	static int rionet_queue_tx_msg(struct sk_buff skb, struct net_device ndev,
	145	struct rio_dev *rdev)
	146	{
4cf1653a	147	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 MP	148
	149	rio_add_outb_message(rnet->mport, rdev, 0, skb->data, skb->len);
	150	rnet->tx_skb[rnet->tx_slot] = skb;
	151
09f75cd7 JG	152	ndev->stats.tx_packets++;
09f75cd7 JG	153	ndev->stats.tx_bytes += skb->len;
f89efd52 MP	154
	155	if (++rnet->tx_cnt == RIONET_TX_RING_SIZE)
	156	netif_stop_queue(ndev);
	157
	158	++rnet->tx_slot;
	159	rnet->tx_slot &= (RIONET_TX_RING_SIZE - 1);
	160
	161	if (netif_msg_tx_queued(rnet))
8df8a475 DM	162	printk(KERN_INFO "%s: queued skb len %8.8x\n", DRV_NAME,
8df8a475 DM	163	skb->len);
f89efd52 MP	164
	165	return 0;
	166	}
	167
	168	static int rionet_start_xmit(struct sk_buff skb, struct net_device ndev)
	169	{
	170	int i;
4cf1653a	171	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 MP	172	struct ethhdr eth = (struct ethhdr )skb->data;
	173	u16 destid;
	174	unsigned long flags;
7c4a6106	175	int add_num = 1;
f89efd52 MP	176
	177	local_irq_save(flags);
	178	if (!spin_trylock(&rnet->tx_lock)) {
	179	local_irq_restore(flags);
	180	return NETDEV_TX_LOCKED;
	181	}
	182
7c4a6106	183	if (is_multicast_ether_addr(eth->h_dest))
2fb717ec	184	add_num = nets[rnet->mport->id].nact;
7c4a6106 AB	185
7c4a6106 AB	186	if ((rnet->tx_cnt + add_num) > RIONET_TX_RING_SIZE) {
f89efd52 MP	187	netif_stop_queue(ndev);
	188	spin_unlock_irqrestore(&rnet->tx_lock, flags);
	189	printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n",
	190	ndev->name);
	191	return NETDEV_TX_BUSY;
	192	}
	193
abfc89c7	194	if (is_multicast_ether_addr(eth->h_dest)) {
7c4a6106	195	int count = 0;
2fb717ec	196
e0423236 ZW	197	for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size);
e0423236 ZW	198	i++)
2fb717ec	199	if (nets[rnet->mport->id].active[i]) {
f89efd52	200	rionet_queue_tx_msg(skb, ndev,
2fb717ec	201	nets[rnet->mport->id].active[i]);
7c4a6106 AB	202	if (count)
	203	atomic_inc(&skb->users);
	204	count++;
	205	}
f89efd52 MP	206	} else if (RIONET_MAC_MATCH(eth->h_dest)) {
f89efd52 MP	207	destid = RIONET_GET_DESTID(eth->h_dest);
2fb717ec AB	208	if (nets[rnet->mport->id].active[destid])
	209	rionet_queue_tx_msg(skb, ndev,
	210	nets[rnet->mport->id].active[destid]);
e6161d64 AB	211	else {
	212	/*
	213	* If the target device was removed from the list of
	214	* active peers but we still have TX packets targeting
	215	* it just report sending a packet to the target
	216	* (without actual packet transfer).
	217	*/
	218	dev_kfree_skb_any(skb);
	219	ndev->stats.tx_packets++;
	220	ndev->stats.tx_bytes += skb->len;
	221	}
f89efd52 MP	222	}
	223
	224	spin_unlock_irqrestore(&rnet->tx_lock, flags);
	225
6ed10654	226	return NETDEV_TX_OK;
f89efd52 MP	227	}
	228
	229	static void rionet_dbell_event(struct rio_mport mport, void dev_id, u16 sid, u16 tid,
	230	u16 info)
	231	{
	232	struct net_device *ndev = dev_id;
4cf1653a	233	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 MP	234	struct rionet_peer *peer;
	235
	236	if (netif_msg_intr(rnet))
	237	printk(KERN_INFO "%s: doorbell sid %4.4x tid %4.4x info %4.4x",
	238	DRV_NAME, sid, tid, info);
	239	if (info == RIONET_DOORBELL_JOIN) {
2fb717ec AB	240	if (!nets[rnet->mport->id].active[sid]) {
	241	list_for_each_entry(peer,
	242	&nets[rnet->mport->id].peers, node) {
7c4a6106	243	if (peer->rdev->destid == sid) {
2fb717ec AB	244	nets[rnet->mport->id].active[sid] =
	245	peer->rdev;
	246	nets[rnet->mport->id].nact++;
7c4a6106	247	}
f89efd52 MP	248	}
	249	rio_mport_send_doorbell(mport, sid,
	250	RIONET_DOORBELL_JOIN);
	251	}
	252	} else if (info == RIONET_DOORBELL_LEAVE) {
2fb717ec AB	253	nets[rnet->mport->id].active[sid] = NULL;
2fb717ec AB	254	nets[rnet->mport->id].nact--;
f89efd52 MP	255	} else {
	256	if (netif_msg_intr(rnet))
	257	printk(KERN_WARNING "%s: unhandled doorbell\n",
	258	DRV_NAME);
	259	}
	260	}
	261
	262	static void rionet_inb_msg_event(struct rio_mport mport, void dev_id, int mbox, int slot)
	263	{
	264	int n;
	265	struct net_device *ndev = dev_id;
4cf1653a	266	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 MP	267
	268	if (netif_msg_intr(rnet))
	269	printk(KERN_INFO "%s: inbound message event, mbox %d slot %d\n",
	270	DRV_NAME, mbox, slot);
	271
	272	spin_lock(&rnet->lock);
	273	if ((n = rionet_rx_clean(ndev)) != rnet->rx_slot)
	274	rionet_rx_fill(ndev, n);
	275	spin_unlock(&rnet->lock);
	276	}
	277
	278	static void rionet_outb_msg_event(struct rio_mport mport, void dev_id, int mbox, int slot)
	279	{
	280	struct net_device *ndev = dev_id;
4cf1653a	281	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 MP	282
	283	spin_lock(&rnet->lock);
	284
	285	if (netif_msg_intr(rnet))
	286	printk(KERN_INFO
	287	"%s: outbound message event, mbox %d slot %d\n",
	288	DRV_NAME, mbox, slot);
	289
	290	while (rnet->tx_cnt && (rnet->ack_slot != slot)) {
	291	/* dma unmap single */
	292	dev_kfree_skb_irq(rnet->tx_skb[rnet->ack_slot]);
	293	rnet->tx_skb[rnet->ack_slot] = NULL;
	294	++rnet->ack_slot;
	295	rnet->ack_slot &= (RIONET_TX_RING_SIZE - 1);
	296	rnet->tx_cnt--;
	297	}
	298
	299	if (rnet->tx_cnt < RIONET_TX_RING_SIZE)
	300	netif_wake_queue(ndev);
	301
	302	spin_unlock(&rnet->lock);
	303	}
	304
	305	static int rionet_open(struct net_device *ndev)
	306	{
	307	int i, rc = 0;
	308	struct rionet_peer peer, tmp;
4cf1653a	309	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 MP	310
	311	if (netif_msg_ifup(rnet))
	312	printk(KERN_INFO "%s: open\n", DRV_NAME);
	313
	314	if ((rc = rio_request_inb_dbell(rnet->mport,
	315	(void *)ndev,
	316	RIONET_DOORBELL_JOIN,
	317	RIONET_DOORBELL_LEAVE,
	318	rionet_dbell_event)) < 0)
	319	goto out;
	320
	321	if ((rc = rio_request_inb_mbox(rnet->mport,
	322	(void *)ndev,
	323	RIONET_MAILBOX,
	324	RIONET_RX_RING_SIZE,
	325	rionet_inb_msg_event)) < 0)
	326	goto out;
	327
	328	if ((rc = rio_request_outb_mbox(rnet->mport,
	329	(void *)ndev,
	330	RIONET_MAILBOX,
	331	RIONET_TX_RING_SIZE,
	332	rionet_outb_msg_event)) < 0)
	333	goto out;
	334
	335	/* Initialize inbound message ring */
	336	for (i = 0; i < RIONET_RX_RING_SIZE; i++)
	337	rnet->rx_skb[i] = NULL;
	338	rnet->rx_slot = 0;
	339	rionet_rx_fill(ndev, 0);
	340
	341	rnet->tx_slot = 0;
	342	rnet->tx_cnt = 0;
	343	rnet->ack_slot = 0;
	344
	345	netif_carrier_on(ndev);
	346	netif_start_queue(ndev);
	347
2fb717ec AB	348	list_for_each_entry_safe(peer, tmp,
2fb717ec AB	349	&nets[rnet->mport->id].peers, node) {
f89efd52 MP	350	if (!(peer->res = rio_request_outb_dbell(peer->rdev,
	351	RIONET_DOORBELL_JOIN,
	352	RIONET_DOORBELL_LEAVE)))
	353	{
	354	printk(KERN_ERR "%s: error requesting doorbells\n",
	355	DRV_NAME);
	356	continue;
	357	}
	358
284fb68d AB	359	/* Send a join message */
284fb68d AB	360	rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN);
f89efd52 MP	361	}
	362
	363	out:
	364	return rc;
	365	}
	366
	367	static int rionet_close(struct net_device *ndev)
	368	{
4cf1653a	369	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 MP	370	struct rionet_peer peer, tmp;
	371	int i;
	372
	373	if (netif_msg_ifup(rnet))
2fb717ec	374	printk(KERN_INFO "%s: close %s\n", DRV_NAME, ndev->name);
f89efd52 MP	375
	376	netif_stop_queue(ndev);
	377	netif_carrier_off(ndev);
	378
	379	for (i = 0; i < RIONET_RX_RING_SIZE; i++)
aaff1e19	380	kfree_skb(rnet->rx_skb[i]);
f89efd52	381
2fb717ec AB	382	list_for_each_entry_safe(peer, tmp,
	383	&nets[rnet->mport->id].peers, node) {
	384	if (nets[rnet->mport->id].active[peer->rdev->destid]) {
f89efd52	385	rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE);
2fb717ec	386	nets[rnet->mport->id].active[peer->rdev->destid] = NULL;
f89efd52 MP	387	}
	388	rio_release_outb_dbell(peer->rdev, peer->res);
	389	}
	390
	391	rio_release_inb_dbell(rnet->mport, RIONET_DOORBELL_JOIN,
	392	RIONET_DOORBELL_LEAVE);
	393	rio_release_inb_mbox(rnet->mport, RIONET_MAILBOX);
	394	rio_release_outb_mbox(rnet->mport, RIONET_MAILBOX);
	395
	396	return 0;
	397	}
	398
e6161d64	399	static int rionet_remove_dev(struct device dev, struct subsys_interface sif)
f89efd52	400	{
e6161d64	401	struct rio_dev *rdev = to_rio_dev(dev);
2fb717ec	402	unsigned char netid = rdev->net->hport->id;
f89efd52 MP	403	struct rionet_peer peer, tmp;
f89efd52 MP	404
e6161d64 AB	405	if (dev_rionet_capable(rdev)) {
	406	list_for_each_entry_safe(peer, tmp, &nets[netid].peers, node) {
	407	if (peer->rdev == rdev) {
	408	if (nets[netid].active[rdev->destid]) {
	409	nets[netid].active[rdev->destid] = NULL;
	410	nets[netid].nact--;
	411	}
2fb717ec	412
e6161d64 AB	413	list_del(&peer->node);
	414	kfree(peer);
	415	break;
	416	}
	417	}
f89efd52	418	}
2fb717ec	419
e6161d64	420	return 0;
f89efd52 MP	421	}
	422
	423	static void rionet_get_drvinfo(struct net_device *ndev,
	424	struct ethtool_drvinfo *info)
	425	{
4cf1653a	426	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52	427
7826d43f JP	428	strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
	429	strlcpy(info->version, DRV_VERSION, sizeof(info->version));
	430	strlcpy(info->fw_version, "n/a", sizeof(info->fw_version));
	431	strlcpy(info->bus_info, rnet->mport->name, sizeof(info->bus_info));
f89efd52 MP	432	}
	433
	434	static u32 rionet_get_msglevel(struct net_device *ndev)
	435	{
4cf1653a	436	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 MP	437
	438	return rnet->msg_enable;
	439	}
	440
	441	static void rionet_set_msglevel(struct net_device *ndev, u32 value)
	442	{
4cf1653a	443	struct rionet_private *rnet = netdev_priv(ndev);
f89efd52 MP	444
	445	rnet->msg_enable = value;
	446	}
	447
7282d491	448	static const struct ethtool_ops rionet_ethtool_ops = {
f89efd52 MP	449	.get_drvinfo = rionet_get_drvinfo,
	450	.get_msglevel = rionet_get_msglevel,
	451	.set_msglevel = rionet_set_msglevel,
	452	.get_link = ethtool_op_get_link,
	453	};
	454
a33a2bb3 AB	455	static const struct net_device_ops rionet_netdev_ops = {
	456	.ndo_open = rionet_open,
	457	.ndo_stop = rionet_close,
	458	.ndo_start_xmit = rionet_start_xmit,
	459	.ndo_change_mtu = eth_change_mtu,
	460	.ndo_validate_addr = eth_validate_addr,
	461	.ndo_set_mac_address = eth_mac_addr,
	462	};
	463
55caa924	464	static int rionet_setup_netdev(struct rio_mport mport, struct net_device ndev)
f89efd52 MP	465	{
f89efd52 MP	466	int rc = 0;
f89efd52 MP	467	struct rionet_private *rnet;
f89efd52 MP	468	u16 device_id;
acc65632 AM	469	const size_t rionet_active_bytes = sizeof(void )
acc65632 AM	470	RIO_MAX_ROUTE_ENTRIES(mport->sys_size);
f89efd52	471
2fb717ec AB	472	nets[mport->id].active = (struct rio_dev **)__get_free_pages(GFP_KERNEL,
	473	get_order(rionet_active_bytes));
	474	if (!nets[mport->id].active) {
e0423236 ZW	475	rc = -ENOMEM;
	476	goto out;
	477	}
2fb717ec	478	memset((void *)nets[mport->id].active, 0, rionet_active_bytes);
e0423236	479
f89efd52	480	/* Set up private area */
4cf1653a	481	rnet = netdev_priv(ndev);
f89efd52 MP	482	rnet->mport = mport;
	483
	484	/* Set the default MAC address */
	485	device_id = rio_local_get_device_id(mport);
	486	ndev->dev_addr[0] = 0x00;
	487	ndev->dev_addr[1] = 0x01;
	488	ndev->dev_addr[2] = 0x00;
	489	ndev->dev_addr[3] = 0x01;
	490	ndev->dev_addr[4] = device_id >> 8;
	491	ndev->dev_addr[5] = device_id & 0xff;
	492
a33a2bb3	493	ndev->netdev_ops = &rionet_netdev_ops;
f89efd52 MP	494	ndev->mtu = RIO_MAX_MSG_SIZE - 14;
f89efd52 MP	495	ndev->features = NETIF_F_LLTX;
2aaf308b	496	SET_NETDEV_DEV(ndev, &mport->dev);
f89efd52 MP	497	SET_ETHTOOL_OPS(ndev, &rionet_ethtool_ops);
f89efd52 MP	498
f89efd52 MP	499	spin_lock_init(&rnet->lock);
	500	spin_lock_init(&rnet->tx_lock);
	501
	502	rnet->msg_enable = RIONET_DEFAULT_MSGLEVEL;
	503
	504	rc = register_netdev(ndev);
	505	if (rc != 0)
	506	goto out;
	507
2fb717ec	508	printk(KERN_INFO "%s: %s %s Version %s, MAC %pM, %s\n",
f89efd52 MP	509	ndev->name,
	510	DRV_NAME,
	511	DRV_DESC,
	512	DRV_VERSION,
2fb717ec AB	513	ndev->dev_addr,
2fb717ec AB	514	mport->name);
f89efd52 MP	515
	516	out:
	517	return rc;
	518	}
	519
2fb717ec AB	520	static unsigned long net_table[RIONET_MAX_NETS/sizeof(unsigned long) + 1];
2fb717ec AB	521
e6161d64	522	static int rionet_add_dev(struct device dev, struct subsys_interface sif)
f89efd52 MP	523	{
f89efd52 MP	524	int rc = -ENODEV;
284fb68d	525	u32 lsrc_ops, ldst_ops;
f89efd52	526	struct rionet_peer *peer;
55caa924	527	struct net_device *ndev = NULL;
e6161d64	528	struct rio_dev *rdev = to_rio_dev(dev);
2fb717ec AB	529	unsigned char netid = rdev->net->hport->id;
2fb717ec AB	530	int oldnet;
f89efd52	531
2fb717ec AB	532	if (netid >= RIONET_MAX_NETS)
2fb717ec AB	533	return rc;
f89efd52	534
2fb717ec	535	oldnet = test_and_set_bit(netid, net_table);
55caa924	536
f89efd52	537	/*
e6161d64 AB	538	* If first time through this net, make sure local device is rionet
	539	* capable and setup netdev (this step will be skipped in later probes
	540	* on the same net).
f89efd52	541	*/
2fb717ec	542	if (!oldnet) {
f89efd52 MP	543	rio_local_read_config_32(rdev->net->hport, RIO_SRC_OPS_CAR,
	544	&lsrc_ops);
	545	rio_local_read_config_32(rdev->net->hport, RIO_DST_OPS_CAR,
	546	&ldst_ops);
284fb68d	547	if (!is_rionet_capable(lsrc_ops, ldst_ops)) {
f89efd52	548	printk(KERN_ERR
2fb717ec AB	549	"%s: local device %s is not network capable\n",
2fb717ec AB	550	DRV_NAME, rdev->net->hport->name);
f89efd52 MP	551	goto out;
	552	}
	553
2fb717ec AB	554	/* Allocate our net_device structure */
	555	ndev = alloc_etherdev(sizeof(struct rionet_private));
	556	if (ndev == NULL) {
	557	rc = -ENOMEM;
	558	goto out;
	559	}
	560	nets[netid].ndev = ndev;
55caa924	561	rc = rionet_setup_netdev(rdev->net->hport, ndev);
e6161d64 AB	562	if (rc) {
	563	printk(KERN_ERR "%s: failed to setup netdev (rc=%d)\n",
	564	DRV_NAME, rc);
	565	goto out;
	566	}
	567
2fb717ec AB	568	INIT_LIST_HEAD(&nets[netid].peers);
	569	nets[netid].nact = 0;
	570	} else if (nets[netid].ndev == NULL)
	571	goto out;
f89efd52 MP	572
	573	/*
	574	* If the remote device has mailbox/doorbell capabilities,
	575	* add it to the peer list.
	576	*/
	577	if (dev_rionet_capable(rdev)) {
	578	if (!(peer = kmalloc(sizeof(struct rionet_peer), GFP_KERNEL))) {
	579	rc = -ENOMEM;
	580	goto out;
	581	}
	582	peer->rdev = rdev;
2fb717ec	583	list_add_tail(&peer->node, &nets[netid].peers);
f89efd52 MP	584	}
f89efd52 MP	585
e6161d64 AB	586	return 0;
e6161d64 AB	587	out:
f89efd52 MP	588	return rc;
	589	}
	590
e6161d64	591	#ifdef MODULE
f89efd52	592	static struct rio_device_id rionet_id_table[] = {
e6161d64 AB	593	{RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)},
e6161d64 AB	594	{ 0, } /* terminate list */
f89efd52 MP	595	};
f89efd52 MP	596
e6161d64 AB	597	MODULE_DEVICE_TABLE(rapidio, rionet_id_table);
	598	#endif
	599
	600	static struct subsys_interface rionet_interface = {
	601	.name = "rionet",
	602	.subsys = &rio_bus_type,
	603	.add_dev = rionet_add_dev,
	604	.remove_dev = rionet_remove_dev,
f89efd52 MP	605	};
	606
	607	static int __init rionet_init(void)
	608	{
e6161d64	609	return subsys_interface_register(&rionet_interface);
f89efd52 MP	610	}
	611
	612	static void __exit rionet_exit(void)
	613	{
e6161d64 AB	614	struct rionet_private *rnet;
	615	struct net_device *ndev;
	616	struct rionet_peer peer, tmp;
	617	int i;
	618
	619	for (i = 0; i < RIONET_MAX_NETS; i++) {
	620	if (nets[i].ndev != NULL) {
	621	ndev = nets[i].ndev;
	622	rnet = netdev_priv(ndev);
	623	unregister_netdev(ndev);
	624
	625	list_for_each_entry_safe(peer,
	626	tmp, &nets[i].peers, node) {
	627	list_del(&peer->node);
	628	kfree(peer);
	629	}
	630
	631	free_pages((unsigned long)nets[i].active,
	632	get_order(sizeof(void )
	633	RIO_MAX_ROUTE_ENTRIES(rnet->mport->sys_size)));
	634	nets[i].active = NULL;
	635
	636	free_netdev(ndev);
	637	}
	638	}
	639
	640	subsys_interface_unregister(&rionet_interface);
f89efd52 MP	641	}
f89efd52 MP	642
2f809985	643	late_initcall(rionet_init);
f89efd52	644	module_exit(rionet_exit);