v4.19.13 snapshot.
diff --git a/drivers/net/rionet.c b/drivers/net/rionet.c
new file mode 100644
index 0000000..bfbb39f
--- /dev/null
+++ b/drivers/net/rionet.c
@@ -0,0 +1,750 @@
+/*
+ * rionet - Ethernet driver over RapidIO messaging services
+ *
+ * Copyright 2005 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * 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>
+#include <linux/reboot.h>
+
+#define DRV_NAME "rionet"
+#define DRV_VERSION "0.3"
+#define DRV_AUTHOR "Matt Porter <mporter@kernel.crashing.org>"
+#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
+#define RIONET_MSG_SIZE RIO_MAX_MSG_SIZE
+#define RIONET_MAX_MTU (RIONET_MSG_SIZE - ETH_HLEN)
+
+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;
+ bool open;
+};
+
+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;
+ spinlock_t lock; /* net info access lock */
+ 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;
+
+ spin_lock_irqsave(&rnet->tx_lock, flags);
+
+ 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)
+ refcount_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).
+ */
+ ndev->stats.tx_packets++;
+ ndev->stats.tx_bytes += skb->len;
+ dev_kfree_skb_any(skb);
+ }
+ }
+
+ 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;
+ unsigned char netid = rnet->mport->id;
+
+ 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[netid].active[sid]) {
+ spin_lock(&nets[netid].lock);
+ list_for_each_entry(peer, &nets[netid].peers, node) {
+ if (peer->rdev->destid == sid) {
+ nets[netid].active[sid] = peer->rdev;
+ nets[netid].nact++;
+ }
+ }
+ spin_unlock(&nets[netid].lock);
+
+ rio_mport_send_doorbell(mport, sid,
+ RIONET_DOORBELL_JOIN);
+ }
+ } else if (info == RIONET_DOORBELL_LEAVE) {
+ spin_lock(&nets[netid].lock);
+ if (nets[netid].active[sid]) {
+ nets[netid].active[sid] = NULL;
+ nets[netid].nact--;
+ }
+ spin_unlock(&nets[netid].lock);
+ } 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->tx_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->tx_lock);
+}
+
+static int rionet_open(struct net_device *ndev)
+{
+ int i, rc = 0;
+ struct rionet_peer *peer;
+ struct rionet_private *rnet = netdev_priv(ndev);
+ unsigned char netid = rnet->mport->id;
+ unsigned long flags;
+
+ 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);
+
+ spin_lock_irqsave(&nets[netid].lock, flags);
+ list_for_each_entry(peer, &nets[netid].peers, node) {
+ /* Send a join message */
+ rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN);
+ }
+ spin_unlock_irqrestore(&nets[netid].lock, flags);
+ rnet->open = true;
+
+ out:
+ return rc;
+}
+
+static int rionet_close(struct net_device *ndev)
+{
+ struct rionet_private *rnet = netdev_priv(ndev);
+ struct rionet_peer *peer;
+ unsigned char netid = rnet->mport->id;
+ unsigned long flags;
+ 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);
+ rnet->open = false;
+
+ for (i = 0; i < RIONET_RX_RING_SIZE; i++)
+ kfree_skb(rnet->rx_skb[i]);
+
+ spin_lock_irqsave(&nets[netid].lock, flags);
+ list_for_each_entry(peer, &nets[netid].peers, node) {
+ if (nets[netid].active[peer->rdev->destid]) {
+ rio_send_doorbell(peer->rdev, RIONET_DOORBELL_LEAVE);
+ nets[netid].active[peer->rdev->destid] = NULL;
+ }
+ if (peer->res)
+ rio_release_outb_dbell(peer->rdev, peer->res);
+ }
+ spin_unlock_irqrestore(&nets[netid].lock, flags);
+
+ 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 void 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;
+ int state, found = 0;
+ unsigned long flags;
+
+ if (!dev_rionet_capable(rdev))
+ return;
+
+ spin_lock_irqsave(&nets[netid].lock, flags);
+ list_for_each_entry(peer, &nets[netid].peers, node) {
+ if (peer->rdev == rdev) {
+ list_del(&peer->node);
+ if (nets[netid].active[rdev->destid]) {
+ state = atomic_read(&rdev->state);
+ if (state != RIO_DEVICE_GONE &&
+ state != RIO_DEVICE_INITIALIZING) {
+ rio_send_doorbell(rdev,
+ RIONET_DOORBELL_LEAVE);
+ }
+ nets[netid].active[rdev->destid] = NULL;
+ nets[netid].nact--;
+ }
+ found = 1;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&nets[netid].lock, flags);
+
+ if (found) {
+ if (peer->res)
+ rio_release_outb_dbell(rdev, peer->res);
+ kfree(peer);
+ }
+}
+
+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_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;
+ rnet->open = false;
+
+ /* 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 = RIONET_MAX_MTU;
+ /* MTU range: 68 - 4082 */
+ ndev->min_mtu = ETH_MIN_MTU;
+ ndev->max_mtu = RIONET_MAX_MTU;
+ ndev->features = NETIF_F_LLTX;
+ SET_NETDEV_DEV(ndev, &mport->dev);
+ ndev->ethtool_ops = &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) {
+ free_pages((unsigned long)nets[mport->id].active,
+ get_order(rionet_active_bytes));
+ 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 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;
+
+ if (netid >= RIONET_MAX_NETS)
+ return rc;
+
+ /*
+ * 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 (!nets[netid].ndev) {
+ 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;
+ }
+
+ rc = rionet_setup_netdev(rdev->net->hport, ndev);
+ if (rc) {
+ printk(KERN_ERR "%s: failed to setup netdev (rc=%d)\n",
+ DRV_NAME, rc);
+ free_netdev(ndev);
+ goto out;
+ }
+
+ INIT_LIST_HEAD(&nets[netid].peers);
+ spin_lock_init(&nets[netid].lock);
+ nets[netid].nact = 0;
+ nets[netid].ndev = ndev;
+ }
+
+ /*
+ * If the remote device has mailbox/doorbell capabilities,
+ * add it to the peer list.
+ */
+ if (dev_rionet_capable(rdev)) {
+ struct rionet_private *rnet;
+ unsigned long flags;
+
+ rnet = netdev_priv(nets[netid].ndev);
+
+ peer = kzalloc(sizeof(*peer), GFP_KERNEL);
+ if (!peer) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ peer->rdev = rdev;
+ peer->res = rio_request_outb_dbell(peer->rdev,
+ RIONET_DOORBELL_JOIN,
+ RIONET_DOORBELL_LEAVE);
+ if (!peer->res) {
+ pr_err("%s: error requesting doorbells\n", DRV_NAME);
+ kfree(peer);
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ spin_lock_irqsave(&nets[netid].lock, flags);
+ list_add_tail(&peer->node, &nets[netid].peers);
+ spin_unlock_irqrestore(&nets[netid].lock, flags);
+ pr_debug("%s: %s add peer %s\n",
+ DRV_NAME, __func__, rio_name(rdev));
+
+ /* If netdev is already opened, send join request to new peer */
+ if (rnet->open)
+ rio_send_doorbell(peer->rdev, RIONET_DOORBELL_JOIN);
+ }
+
+ return 0;
+out:
+ return rc;
+}
+
+static int rionet_shutdown(struct notifier_block *nb, unsigned long code,
+ void *unused)
+{
+ struct rionet_peer *peer;
+ unsigned long flags;
+ int i;
+
+ pr_debug("%s: %s\n", DRV_NAME, __func__);
+
+ for (i = 0; i < RIONET_MAX_NETS; i++) {
+ if (!nets[i].ndev)
+ continue;
+
+ spin_lock_irqsave(&nets[i].lock, flags);
+ list_for_each_entry(peer, &nets[i].peers, node) {
+ if (nets[i].active[peer->rdev->destid]) {
+ rio_send_doorbell(peer->rdev,
+ RIONET_DOORBELL_LEAVE);
+ nets[i].active[peer->rdev->destid] = NULL;
+ }
+ }
+ spin_unlock_irqrestore(&nets[i].lock, flags);
+ }
+
+ return NOTIFY_DONE;
+}
+
+static void rionet_remove_mport(struct device *dev,
+ struct class_interface *class_intf)
+{
+ struct rio_mport *mport = to_rio_mport(dev);
+ struct net_device *ndev;
+ int id = mport->id;
+
+ pr_debug("%s %s\n", __func__, mport->name);
+
+ WARN(nets[id].nact, "%s called when connected to %d peers\n",
+ __func__, nets[id].nact);
+ WARN(!nets[id].ndev, "%s called for mport without NDEV\n",
+ __func__);
+
+ if (nets[id].ndev) {
+ ndev = nets[id].ndev;
+ netif_stop_queue(ndev);
+ unregister_netdev(ndev);
+
+ free_pages((unsigned long)nets[id].active,
+ get_order(sizeof(void *) *
+ RIO_MAX_ROUTE_ENTRIES(mport->sys_size)));
+ nets[id].active = NULL;
+ free_netdev(ndev);
+ nets[id].ndev = NULL;
+ }
+}
+
+#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 struct notifier_block rionet_notifier = {
+ .notifier_call = rionet_shutdown,
+};
+
+/* the rio_mport_interface is used to handle local mport devices */
+static struct class_interface rio_mport_interface __refdata = {
+ .class = &rio_mport_class,
+ .add_dev = NULL,
+ .remove_dev = rionet_remove_mport,
+};
+
+static int __init rionet_init(void)
+{
+ int ret;
+
+ ret = register_reboot_notifier(&rionet_notifier);
+ if (ret) {
+ pr_err("%s: failed to register reboot notifier (err=%d)\n",
+ DRV_NAME, ret);
+ return ret;
+ }
+
+ ret = class_interface_register(&rio_mport_interface);
+ if (ret) {
+ pr_err("%s: class_interface_register error: %d\n",
+ DRV_NAME, ret);
+ return ret;
+ }
+
+ return subsys_interface_register(&rionet_interface);
+}
+
+static void __exit rionet_exit(void)
+{
+ unregister_reboot_notifier(&rionet_notifier);
+ subsys_interface_unregister(&rionet_interface);
+ class_interface_unregister(&rio_mport_interface);
+}
+
+late_initcall(rionet_init);
+module_exit(rionet_exit);