cassini/niu/sun*: Move the Sun drivers

Moves the Sun drivers into drivers/net/ethernet/sun/ and make
the necessary Kconfig and Makefile changes.

Oliver Hartkopp <socketcan@hartkopp.net> suggested removing the
sun* prefix on the driver names.  This type of change I will
leave up to the driver maintainers.

CC: Sam Creasey <sammy@sammy.net>
CC: Adrian Sun <asun@darksunrising.com>
CC: Benjamin Herrenscmidt <benh@kernel.crashing.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 1284 deletions

diff --git a/drivers/net/sunvnet.c b/drivers/net/sunvnet.c
deleted file mode 100644
index bf3c762de62..00000000000
--- a/drivers/net/sunvnet.c
+++ /dev/null
@@ -1,1284 +0,0 @@
-/* sunvnet.c: Sun LDOM Virtual Network Driver.
- *
- * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/ethtool.h>
-#include <linux/etherdevice.h>
-#include <linux/mutex.h>
-
-#include <asm/vio.h>
-#include <asm/ldc.h>
-
-#include "sunvnet.h"
-
-#define DRV_MODULE_NAME		"sunvnet"
-#define DRV_MODULE_VERSION	"1.0"
-#define DRV_MODULE_RELDATE	"June 25, 2007"
-
-static char version[] __devinitdata =
-	DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
-MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
-MODULE_DESCRIPTION("Sun LDOM virtual network driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(DRV_MODULE_VERSION);
-
-/* Ordered from largest major to lowest */
-static struct vio_version vnet_versions[] = {
-	{ .major = 1, .minor = 0 },
-};
-
-static inline u32 vnet_tx_dring_avail(struct vio_dring_state *dr)
-{
-	return vio_dring_avail(dr, VNET_TX_RING_SIZE);
-}
-
-static int vnet_handle_unknown(struct vnet_port *port, void *arg)
-{
-	struct vio_msg_tag *pkt = arg;
-
-	pr_err("Received unknown msg [%02x:%02x:%04x:%08x]\n",
-	       pkt->type, pkt->stype, pkt->stype_env, pkt->sid);
-	pr_err("Resetting connection\n");
-
-	ldc_disconnect(port->vio.lp);
-
-	return -ECONNRESET;
-}
-
-static int vnet_send_attr(struct vio_driver_state *vio)
-{
-	struct vnet_port *port = to_vnet_port(vio);
-	struct net_device *dev = port->vp->dev;
-	struct vio_net_attr_info pkt;
-	int i;
-
-	memset(&pkt, 0, sizeof(pkt));
-	pkt.tag.type = VIO_TYPE_CTRL;
-	pkt.tag.stype = VIO_SUBTYPE_INFO;
-	pkt.tag.stype_env = VIO_ATTR_INFO;
-	pkt.tag.sid = vio_send_sid(vio);
-	pkt.xfer_mode = VIO_DRING_MODE;
-	pkt.addr_type = VNET_ADDR_ETHERMAC;
-	pkt.ack_freq = 0;
-	for (i = 0; i < 6; i++)
-		pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8);
-	pkt.mtu = ETH_FRAME_LEN;
-
-	viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] "
-	       "ackfreq[%u] mtu[%llu]\n",
-	       pkt.xfer_mode, pkt.addr_type,
-	       (unsigned long long) pkt.addr,
-	       pkt.ack_freq,
-	       (unsigned long long) pkt.mtu);
-
-	return vio_ldc_send(vio, &pkt, sizeof(pkt));
-}
-
-static int handle_attr_info(struct vio_driver_state *vio,
-			    struct vio_net_attr_info *pkt)
-{
-	viodbg(HS, "GOT NET ATTR INFO xmode[0x%x] atype[0x%x] addr[%llx] "
-	       "ackfreq[%u] mtu[%llu]\n",
-	       pkt->xfer_mode, pkt->addr_type,
-	       (unsigned long long) pkt->addr,
-	       pkt->ack_freq,
-	       (unsigned long long) pkt->mtu);
-
-	pkt->tag.sid = vio_send_sid(vio);
-
-	if (pkt->xfer_mode != VIO_DRING_MODE ||
-	    pkt->addr_type != VNET_ADDR_ETHERMAC ||
-	    pkt->mtu != ETH_FRAME_LEN) {
-		viodbg(HS, "SEND NET ATTR NACK\n");
-
-		pkt->tag.stype = VIO_SUBTYPE_NACK;
-
-		(void) vio_ldc_send(vio, pkt, sizeof(*pkt));
-
-		return -ECONNRESET;
-	} else {
-		viodbg(HS, "SEND NET ATTR ACK\n");
-
-		pkt->tag.stype = VIO_SUBTYPE_ACK;
-
-		return vio_ldc_send(vio, pkt, sizeof(*pkt));
-	}
-
-}
-
-static int handle_attr_ack(struct vio_driver_state *vio,
-			   struct vio_net_attr_info *pkt)
-{
-	viodbg(HS, "GOT NET ATTR ACK\n");
-
-	return 0;
-}
-
-static int handle_attr_nack(struct vio_driver_state *vio,
-			    struct vio_net_attr_info *pkt)
-{
-	viodbg(HS, "GOT NET ATTR NACK\n");
-
-	return -ECONNRESET;
-}
-
-static int vnet_handle_attr(struct vio_driver_state *vio, void *arg)
-{
-	struct vio_net_attr_info *pkt = arg;
-
-	switch (pkt->tag.stype) {
-	case VIO_SUBTYPE_INFO:
-		return handle_attr_info(vio, pkt);
-
-	case VIO_SUBTYPE_ACK:
-		return handle_attr_ack(vio, pkt);
-
-	case VIO_SUBTYPE_NACK:
-		return handle_attr_nack(vio, pkt);
-
-	default:
-		return -ECONNRESET;
-	}
-}
-
-static void vnet_handshake_complete(struct vio_driver_state *vio)
-{
-	struct vio_dring_state *dr;
-
-	dr = &vio->drings[VIO_DRIVER_RX_RING];
-	dr->snd_nxt = dr->rcv_nxt = 1;
-
-	dr = &vio->drings[VIO_DRIVER_TX_RING];
-	dr->snd_nxt = dr->rcv_nxt = 1;
-}
-
-/* The hypervisor interface that implements copying to/from imported
- * memory from another domain requires that copies are done to 8-byte
- * aligned buffers, and that the lengths of such copies are also 8-byte
- * multiples.
- *
- * So we align skb->data to an 8-byte multiple and pad-out the data
- * area so we can round the copy length up to the next multiple of
- * 8 for the copy.
- *
- * The transmitter puts the actual start of the packet 6 bytes into
- * the buffer it sends over, so that the IP headers after the ethernet
- * header are aligned properly.  These 6 bytes are not in the descriptor
- * length, they are simply implied.  This offset is represented using
- * the VNET_PACKET_SKIP macro.
- */
-static struct sk_buff *alloc_and_align_skb(struct net_device *dev,
-					   unsigned int len)
-{
-	struct sk_buff *skb = netdev_alloc_skb(dev, len+VNET_PACKET_SKIP+8+8);
-	unsigned long addr, off;
-
-	if (unlikely(!skb))
-		return NULL;
-
-	addr = (unsigned long) skb->data;
-	off = ((addr + 7UL) & ~7UL) - addr;
-	if (off)
-		skb_reserve(skb, off);
-
-	return skb;
-}
-
-static int vnet_rx_one(struct vnet_port *port, unsigned int len,
-		       struct ldc_trans_cookie *cookies, int ncookies)
-{
-	struct net_device *dev = port->vp->dev;
-	unsigned int copy_len;
-	struct sk_buff *skb;
-	int err;
-
-	err = -EMSGSIZE;
-	if (unlikely(len < ETH_ZLEN || len > ETH_FRAME_LEN)) {
-		dev->stats.rx_length_errors++;
-		goto out_dropped;
-	}
-
-	skb = alloc_and_align_skb(dev, len);
-	err = -ENOMEM;
-	if (unlikely(!skb)) {
-		dev->stats.rx_missed_errors++;
-		goto out_dropped;
-	}
-
-	copy_len = (len + VNET_PACKET_SKIP + 7U) & ~7U;
-	skb_put(skb, copy_len);
-	err = ldc_copy(port->vio.lp, LDC_COPY_IN,
-		       skb->data, copy_len, 0,
-		       cookies, ncookies);
-	if (unlikely(err < 0)) {
-		dev->stats.rx_frame_errors++;
-		goto out_free_skb;
-	}
-
-	skb_pull(skb, VNET_PACKET_SKIP);
-	skb_trim(skb, len);
-	skb->protocol = eth_type_trans(skb, dev);
-
-	dev->stats.rx_packets++;
-	dev->stats.rx_bytes += len;
-
-	netif_rx(skb);
-
-	return 0;
-
-out_free_skb:
-	kfree_skb(skb);
-
-out_dropped:
-	dev->stats.rx_dropped++;
-	return err;
-}
-
-static int vnet_send_ack(struct vnet_port *port, struct vio_dring_state *dr,
-			 u32 start, u32 end, u8 vio_dring_state)
-{
-	struct vio_dring_data hdr = {
-		.tag = {
-			.type		= VIO_TYPE_DATA,
-			.stype		= VIO_SUBTYPE_ACK,
-			.stype_env	= VIO_DRING_DATA,
-			.sid		= vio_send_sid(&port->vio),
-		},
-		.dring_ident		= dr->ident,
-		.start_idx		= start,
-		.end_idx		= end,
-		.state			= vio_dring_state,
-	};
-	int err, delay;
-
-	hdr.seq = dr->snd_nxt;
-	delay = 1;
-	do {
-		err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr));
-		if (err > 0) {
-			dr->snd_nxt++;
-			break;
-		}
-		udelay(delay);
-		if ((delay <<= 1) > 128)
-			delay = 128;
-	} while (err == -EAGAIN);
-
-	return err;
-}
-
-static u32 next_idx(u32 idx, struct vio_dring_state *dr)
-{
-	if (++idx == dr->num_entries)
-		idx = 0;
-	return idx;
-}
-
-static u32 prev_idx(u32 idx, struct vio_dring_state *dr)
-{
-	if (idx == 0)
-		idx = dr->num_entries - 1;
-	else
-		idx--;
-
-	return idx;
-}
-
-static struct vio_net_desc *get_rx_desc(struct vnet_port *port,
-					struct vio_dring_state *dr,
-					u32 index)
-{
-	struct vio_net_desc *desc = port->vio.desc_buf;
-	int err;
-
-	err = ldc_get_dring_entry(port->vio.lp, desc, dr->entry_size,
-				  (index * dr->entry_size),
-				  dr->cookies, dr->ncookies);
-	if (err < 0)
-		return ERR_PTR(err);
-
-	return desc;
-}
-
-static int put_rx_desc(struct vnet_port *port,
-		       struct vio_dring_state *dr,
-		       struct vio_net_desc *desc,
-		       u32 index)
-{
-	int err;
-
-	err = ldc_put_dring_entry(port->vio.lp, desc, dr->entry_size,
-				  (index * dr->entry_size),
-				  dr->cookies, dr->ncookies);
-	if (err < 0)
-		return err;
-
-	return 0;
-}
-
-static int vnet_walk_rx_one(struct vnet_port *port,
-			    struct vio_dring_state *dr,
-			    u32 index, int *needs_ack)
-{
-	struct vio_net_desc *desc = get_rx_desc(port, dr, index);
-	struct vio_driver_state *vio = &port->vio;
-	int err;
-
-	if (IS_ERR(desc))
-		return PTR_ERR(desc);
-
-	viodbg(DATA, "vio_walk_rx_one desc[%02x:%02x:%08x:%08x:%llx:%llx]\n",
-	       desc->hdr.state, desc->hdr.ack,
-	       desc->size, desc->ncookies,
-	       desc->cookies[0].cookie_addr,
-	       desc->cookies[0].cookie_size);
-
-	if (desc->hdr.state != VIO_DESC_READY)
-		return 1;
-	err = vnet_rx_one(port, desc->size, desc->cookies, desc->ncookies);
-	if (err == -ECONNRESET)
-		return err;
-	desc->hdr.state = VIO_DESC_DONE;
-	err = put_rx_desc(port, dr, desc, index);
-	if (err < 0)
-		return err;
-	*needs_ack = desc->hdr.ack;
-	return 0;
-}
-
-static int vnet_walk_rx(struct vnet_port *port, struct vio_dring_state *dr,
-			u32 start, u32 end)
-{
-	struct vio_driver_state *vio = &port->vio;
-	int ack_start = -1, ack_end = -1;
-
-	end = (end == (u32) -1) ? prev_idx(start, dr) : next_idx(end, dr);
-
-	viodbg(DATA, "vnet_walk_rx start[%08x] end[%08x]\n", start, end);
-
-	while (start != end) {
-		int ack = 0, err = vnet_walk_rx_one(port, dr, start, &ack);
-		if (err == -ECONNRESET)
-			return err;
-		if (err != 0)
-			break;
-		if (ack_start == -1)
-			ack_start = start;
-		ack_end = start;
-		start = next_idx(start, dr);
-		if (ack && start != end) {
-			err = vnet_send_ack(port, dr, ack_start, ack_end,
-					    VIO_DRING_ACTIVE);
-			if (err == -ECONNRESET)
-				return err;
-			ack_start = -1;
-		}
-	}
-	if (unlikely(ack_start == -1))
-		ack_start = ack_end = prev_idx(start, dr);
-	return vnet_send_ack(port, dr, ack_start, ack_end, VIO_DRING_STOPPED);
-}
-
-static int vnet_rx(struct vnet_port *port, void *msgbuf)
-{
-	struct vio_dring_data *pkt = msgbuf;
-	struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_RX_RING];
-	struct vio_driver_state *vio = &port->vio;
-
-	viodbg(DATA, "vnet_rx stype_env[%04x] seq[%016llx] rcv_nxt[%016llx]\n",
-	       pkt->tag.stype_env, pkt->seq, dr->rcv_nxt);
-
-	if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA))
-		return 0;
-	if (unlikely(pkt->seq != dr->rcv_nxt)) {
-		pr_err("RX out of sequence seq[0x%llx] rcv_nxt[0x%llx]\n",
-		       pkt->seq, dr->rcv_nxt);
-		return 0;
-	}
-
-	dr->rcv_nxt++;
-
-	/* XXX Validate pkt->start_idx and pkt->end_idx XXX */
-
-	return vnet_walk_rx(port, dr, pkt->start_idx, pkt->end_idx);
-}
-
-static int idx_is_pending(struct vio_dring_state *dr, u32 end)
-{
-	u32 idx = dr->cons;
-	int found = 0;
-
-	while (idx != dr->prod) {
-		if (idx == end) {
-			found = 1;
-			break;
-		}
-		idx = next_idx(idx, dr);
-	}
-	return found;
-}
-
-static int vnet_ack(struct vnet_port *port, void *msgbuf)
-{
-	struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
-	struct vio_dring_data *pkt = msgbuf;
-	struct net_device *dev;
-	struct vnet *vp;
-	u32 end;
-
-	if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA))
-		return 0;
-
-	end = pkt->end_idx;
-	if (unlikely(!idx_is_pending(dr, end)))
-		return 0;
-
-	dr->cons = next_idx(end, dr);
-
-	vp = port->vp;
-	dev = vp->dev;
-	if (unlikely(netif_queue_stopped(dev) &&
-		     vnet_tx_dring_avail(dr) >= VNET_TX_WAKEUP_THRESH(dr)))
-		return 1;
-
-	return 0;
-}
-
-static int vnet_nack(struct vnet_port *port, void *msgbuf)
-{
-	/* XXX just reset or similar XXX */
-	return 0;
-}
-
-static int handle_mcast(struct vnet_port *port, void *msgbuf)
-{
-	struct vio_net_mcast_info *pkt = msgbuf;
-
-	if (pkt->tag.stype != VIO_SUBTYPE_ACK)
-		pr_err("%s: Got unexpected MCAST reply [%02x:%02x:%04x:%08x]\n",
-		       port->vp->dev->name,
-		       pkt->tag.type,
-		       pkt->tag.stype,
-		       pkt->tag.stype_env,
-		       pkt->tag.sid);
-
-	return 0;
-}
-
-static void maybe_tx_wakeup(struct vnet *vp)
-{
-	struct net_device *dev = vp->dev;
-
-	netif_tx_lock(dev);
-	if (likely(netif_queue_stopped(dev))) {
-		struct vnet_port *port;
-		int wake = 1;
-
-		list_for_each_entry(port, &vp->port_list, list) {
-			struct vio_dring_state *dr;
-
-			dr = &port->vio.drings[VIO_DRIVER_TX_RING];
-			if (vnet_tx_dring_avail(dr) <
-			    VNET_TX_WAKEUP_THRESH(dr)) {
-				wake = 0;
-				break;
-			}
-		}
-		if (wake)
-			netif_wake_queue(dev);
-	}
-	netif_tx_unlock(dev);
-}
-
-static void vnet_event(void *arg, int event)
-{
-	struct vnet_port *port = arg;
-	struct vio_driver_state *vio = &port->vio;
-	unsigned long flags;
-	int tx_wakeup, err;
-
-	spin_lock_irqsave(&vio->lock, flags);
-
-	if (unlikely(event == LDC_EVENT_RESET ||
-		     event == LDC_EVENT_UP)) {
-		vio_link_state_change(vio, event);
-		spin_unlock_irqrestore(&vio->lock, flags);
-
-		if (event == LDC_EVENT_RESET)
-			vio_port_up(vio);
-		return;
-	}
-
-	if (unlikely(event != LDC_EVENT_DATA_READY)) {
-		pr_warning("Unexpected LDC event %d\n", event);
-		spin_unlock_irqrestore(&vio->lock, flags);
-		return;
-	}
-
-	tx_wakeup = err = 0;
-	while (1) {
-		union {
-			struct vio_msg_tag tag;
-			u64 raw[8];
-		} msgbuf;
-
-		err = ldc_read(vio->lp, &msgbuf, sizeof(msgbuf));
-		if (unlikely(err < 0)) {
-			if (err == -ECONNRESET)
-				vio_conn_reset(vio);
-			break;
-		}
-		if (err == 0)
-			break;
-		viodbg(DATA, "TAG [%02x:%02x:%04x:%08x]\n",
-		       msgbuf.tag.type,
-		       msgbuf.tag.stype,
-		       msgbuf.tag.stype_env,
-		       msgbuf.tag.sid);
-		err = vio_validate_sid(vio, &msgbuf.tag);
-		if (err < 0)
-			break;
-
-		if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) {
-			if (msgbuf.tag.stype == VIO_SUBTYPE_INFO) {
-				err = vnet_rx(port, &msgbuf);
-			} else if (msgbuf.tag.stype == VIO_SUBTYPE_ACK) {
-				err = vnet_ack(port, &msgbuf);
-				if (err > 0)
-					tx_wakeup |= err;
-			} else if (msgbuf.tag.stype == VIO_SUBTYPE_NACK) {
-				err = vnet_nack(port, &msgbuf);
-			}
-		} else if (msgbuf.tag.type == VIO_TYPE_CTRL) {
-			if (msgbuf.tag.stype_env == VNET_MCAST_INFO)
-				err = handle_mcast(port, &msgbuf);
-			else
-				err = vio_control_pkt_engine(vio, &msgbuf);
-			if (err)
-				break;
-		} else {
-			err = vnet_handle_unknown(port, &msgbuf);
-		}
-		if (err == -ECONNRESET)
-			break;
-	}
-	spin_unlock(&vio->lock);
-	if (unlikely(tx_wakeup && err != -ECONNRESET))
-		maybe_tx_wakeup(port->vp);
-	local_irq_restore(flags);
-}
-
-static int __vnet_tx_trigger(struct vnet_port *port)
-{
-	struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
-	struct vio_dring_data hdr = {
-		.tag = {
-			.type		= VIO_TYPE_DATA,
-			.stype		= VIO_SUBTYPE_INFO,
-			.stype_env	= VIO_DRING_DATA,
-			.sid		= vio_send_sid(&port->vio),
-		},
-		.dring_ident		= dr->ident,
-		.start_idx		= dr->prod,
-		.end_idx		= (u32) -1,
-	};
-	int err, delay;
-
-	hdr.seq = dr->snd_nxt;
-	delay = 1;
-	do {
-		err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr));
-		if (err > 0) {
-			dr->snd_nxt++;
-			break;
-		}
-		udelay(delay);
-		if ((delay <<= 1) > 128)
-			delay = 128;
-	} while (err == -EAGAIN);
-
-	return err;
-}
-
-struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
-{
-	unsigned int hash = vnet_hashfn(skb->data);
-	struct hlist_head *hp = &vp->port_hash[hash];
-	struct hlist_node *n;
-	struct vnet_port *port;
-
-	hlist_for_each_entry(port, n, hp, hash) {
-		if (!compare_ether_addr(port->raddr, skb->data))
-			return port;
-	}
-	port = NULL;
-	if (!list_empty(&vp->port_list))
-		port = list_entry(vp->port_list.next, struct vnet_port, list);
-
-	return port;
-}
-
-struct vnet_port *tx_port_find(struct vnet *vp, struct sk_buff *skb)
-{
-	struct vnet_port *ret;
-	unsigned long flags;
-
-	spin_lock_irqsave(&vp->lock, flags);
-	ret = __tx_port_find(vp, skb);
-	spin_unlock_irqrestore(&vp->lock, flags);
-
-	return ret;
-}
-
-static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct vnet *vp = netdev_priv(dev);
-	struct vnet_port *port = tx_port_find(vp, skb);
-	struct vio_dring_state *dr;
-	struct vio_net_desc *d;
-	unsigned long flags;
-	unsigned int len;
-	void *tx_buf;
-	int i, err;
-
-	if (unlikely(!port))
-		goto out_dropped;
-
-	spin_lock_irqsave(&port->vio.lock, flags);
-
-	dr = &port->vio.drings[VIO_DRIVER_TX_RING];
-	if (unlikely(vnet_tx_dring_avail(dr) < 2)) {
-		if (!netif_queue_stopped(dev)) {
-			netif_stop_queue(dev);
-
-			/* This is a hard error, log it. */
-			netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
-			dev->stats.tx_errors++;
-		}
-		spin_unlock_irqrestore(&port->vio.lock, flags);
-		return NETDEV_TX_BUSY;
-	}
-
-	d = vio_dring_cur(dr);
-
-	tx_buf = port->tx_bufs[dr->prod].buf;
-	skb_copy_from_linear_data(skb, tx_buf + VNET_PACKET_SKIP, skb->len);
-
-	len = skb->len;
-	if (len < ETH_ZLEN) {
-		len = ETH_ZLEN;
-		memset(tx_buf+VNET_PACKET_SKIP+skb->len, 0, len - skb->len);
-	}
-
-	d->hdr.ack = VIO_ACK_ENABLE;
-	d->size = len;
-	d->ncookies = port->tx_bufs[dr->prod].ncookies;
-	for (i = 0; i < d->ncookies; i++)
-		d->cookies[i] = port->tx_bufs[dr->prod].cookies[i];
-
-	/* This has to be a non-SMP write barrier because we are writing
-	 * to memory which is shared with the peer LDOM.
-	 */
-	wmb();
-
-	d->hdr.state = VIO_DESC_READY;
-
-	err = __vnet_tx_trigger(port);
-	if (unlikely(err < 0)) {
-		netdev_info(dev, "TX trigger error %d\n", err);
-		d->hdr.state = VIO_DESC_FREE;
-		dev->stats.tx_carrier_errors++;
-		goto out_dropped_unlock;
-	}
-
-	dev->stats.tx_packets++;
-	dev->stats.tx_bytes += skb->len;
-
-	dr->prod = (dr->prod + 1) & (VNET_TX_RING_SIZE - 1);
-	if (unlikely(vnet_tx_dring_avail(dr) < 2)) {
-		netif_stop_queue(dev);
-		if (vnet_tx_dring_avail(dr) > VNET_TX_WAKEUP_THRESH(dr))
-			netif_wake_queue(dev);
-	}
-
-	spin_unlock_irqrestore(&port->vio.lock, flags);
-
-	dev_kfree_skb(skb);
-
-	return NETDEV_TX_OK;
-
-out_dropped_unlock:
-	spin_unlock_irqrestore(&port->vio.lock, flags);
-
-out_dropped:
-	dev_kfree_skb(skb);
-	dev->stats.tx_dropped++;
-	return NETDEV_TX_OK;
-}
-
-static void vnet_tx_timeout(struct net_device *dev)
-{
-	/* XXX Implement me XXX */
-}
-
-static int vnet_open(struct net_device *dev)
-{
-	netif_carrier_on(dev);
-	netif_start_queue(dev);
-
-	return 0;
-}
-
-static int vnet_close(struct net_device *dev)
-{
-	netif_stop_queue(dev);
-	netif_carrier_off(dev);
-
-	return 0;
-}
-
-static struct vnet_mcast_entry *__vnet_mc_find(struct vnet *vp, u8 *addr)
-{
-	struct vnet_mcast_entry *m;
-
-	for (m = vp->mcast_list; m; m = m->next) {
-		if (!memcmp(m->addr, addr, ETH_ALEN))
-			return m;
-	}
-	return NULL;
-}
-
-static void __update_mc_list(struct vnet *vp, struct net_device *dev)
-{
-	struct netdev_hw_addr *ha;
-
-	netdev_for_each_mc_addr(ha, dev) {
-		struct vnet_mcast_entry *m;
-
-		m = __vnet_mc_find(vp, ha->addr);
-		if (m) {
-			m->hit = 1;
-			continue;
-		}
-
-		if (!m) {
-			m = kzalloc(sizeof(*m), GFP_ATOMIC);
-			if (!m)
-				continue;
-			memcpy(m->addr, ha->addr, ETH_ALEN);
-			m->hit = 1;
-
-			m->next = vp->mcast_list;
-			vp->mcast_list = m;
-		}
-	}
-}
-
-static void __send_mc_list(struct vnet *vp, struct vnet_port *port)
-{
-	struct vio_net_mcast_info info;
-	struct vnet_mcast_entry *m, **pp;
-	int n_addrs;
-
-	memset(&info, 0, sizeof(info));
-
-	info.tag.type = VIO_TYPE_CTRL;
-	info.tag.stype = VIO_SUBTYPE_INFO;
-	info.tag.stype_env = VNET_MCAST_INFO;
-	info.tag.sid = vio_send_sid(&port->vio);
-	info.set = 1;
-
-	n_addrs = 0;
-	for (m = vp->mcast_list; m; m = m->next) {
-		if (m->sent)
-			continue;
-		m->sent = 1;
-		memcpy(&info.mcast_addr[n_addrs * ETH_ALEN],
-		       m->addr, ETH_ALEN);
-		if (++n_addrs == VNET_NUM_MCAST) {
-			info.count = n_addrs;
-
-			(void) vio_ldc_send(&port->vio, &info,
-					    sizeof(info));
-			n_addrs = 0;
-		}
-	}
-	if (n_addrs) {
-		info.count = n_addrs;
-		(void) vio_ldc_send(&port->vio, &info, sizeof(info));
-	}
-
-	info.set = 0;
-
-	n_addrs = 0;
-	pp = &vp->mcast_list;
-	while ((m = *pp) != NULL) {
-		if (m->hit) {
-			m->hit = 0;
-			pp = &m->next;
-			continue;
-		}
-
-		memcpy(&info.mcast_addr[n_addrs * ETH_ALEN],
-		       m->addr, ETH_ALEN);
-		if (++n_addrs == VNET_NUM_MCAST) {
-			info.count = n_addrs;
-			(void) vio_ldc_send(&port->vio, &info,
-					    sizeof(info));
-			n_addrs = 0;
-		}
-
-		*pp = m->next;
-		kfree(m);
-	}
-	if (n_addrs) {
-		info.count = n_addrs;
-		(void) vio_ldc_send(&port->vio, &info, sizeof(info));
-	}
-}
-
-static void vnet_set_rx_mode(struct net_device *dev)
-{
-	struct vnet *vp = netdev_priv(dev);
-	struct vnet_port *port;
-	unsigned long flags;
-
-	spin_lock_irqsave(&vp->lock, flags);
-	if (!list_empty(&vp->port_list)) {
-		port = list_entry(vp->port_list.next, struct vnet_port, list);
-
-		if (port->switch_port) {
-			__update_mc_list(vp, dev);
-			__send_mc_list(vp, port);
-		}
-	}
-	spin_unlock_irqrestore(&vp->lock, flags);
-}
-
-static int vnet_change_mtu(struct net_device *dev, int new_mtu)
-{
-	if (new_mtu != ETH_DATA_LEN)
-		return -EINVAL;
-
-	dev->mtu = new_mtu;
-	return 0;
-}
-
-static int vnet_set_mac_addr(struct net_device *dev, void *p)
-{
-	return -EINVAL;
-}
-
-static void vnet_get_drvinfo(struct net_device *dev,
-			     struct ethtool_drvinfo *info)
-{
-	strcpy(info->driver, DRV_MODULE_NAME);
-	strcpy(info->version, DRV_MODULE_VERSION);
-}
-
-static u32 vnet_get_msglevel(struct net_device *dev)
-{
-	struct vnet *vp = netdev_priv(dev);
-	return vp->msg_enable;
-}
-
-static void vnet_set_msglevel(struct net_device *dev, u32 value)
-{
-	struct vnet *vp = netdev_priv(dev);
-	vp->msg_enable = value;
-}
-
-static const struct ethtool_ops vnet_ethtool_ops = {
-	.get_drvinfo		= vnet_get_drvinfo,
-	.get_msglevel		= vnet_get_msglevel,
-	.set_msglevel		= vnet_set_msglevel,
-	.get_link		= ethtool_op_get_link,
-};
-
-static void vnet_port_free_tx_bufs(struct vnet_port *port)
-{
-	struct vio_dring_state *dr;
-	int i;
-
-	dr = &port->vio.drings[VIO_DRIVER_TX_RING];
-	if (dr->base) {
-		ldc_free_exp_dring(port->vio.lp, dr->base,
-				   (dr->entry_size * dr->num_entries),
-				   dr->cookies, dr->ncookies);
-		dr->base = NULL;
-		dr->entry_size = 0;
-		dr->num_entries = 0;
-		dr->pending = 0;
-		dr->ncookies = 0;
-	}
-
-	for (i = 0; i < VNET_TX_RING_SIZE; i++) {
-		void *buf = port->tx_bufs[i].buf;
-
-		if (!buf)
-			continue;
-
-		ldc_unmap(port->vio.lp,
-			  port->tx_bufs[i].cookies,
-			  port->tx_bufs[i].ncookies);
-
-		kfree(buf);
-		port->tx_bufs[i].buf = NULL;
-	}
-}
-
-static int __devinit vnet_port_alloc_tx_bufs(struct vnet_port *port)
-{
-	struct vio_dring_state *dr;
-	unsigned long len;
-	int i, err, ncookies;
-	void *dring;
-
-	for (i = 0; i < VNET_TX_RING_SIZE; i++) {
-		void *buf = kzalloc(ETH_FRAME_LEN + 8, GFP_KERNEL);
-		int map_len = (ETH_FRAME_LEN + 7) & ~7;
-
-		err = -ENOMEM;
-		if (!buf) {
-			pr_err("TX buffer allocation failure\n");
-			goto err_out;
-		}
-		err = -EFAULT;
-		if ((unsigned long)buf & (8UL - 1)) {
-			pr_err("TX buffer misaligned\n");
-			kfree(buf);
-			goto err_out;
-		}
-
-		err = ldc_map_single(port->vio.lp, buf, map_len,
-				     port->tx_bufs[i].cookies, 2,
-				     (LDC_MAP_SHADOW |
-				      LDC_MAP_DIRECT |
-				      LDC_MAP_RW));
-		if (err < 0) {
-			kfree(buf);
-			goto err_out;
-		}
-		port->tx_bufs[i].buf = buf;
-		port->tx_bufs[i].ncookies = err;
-	}
-
-	dr = &port->vio.drings[VIO_DRIVER_TX_RING];
-
-	len = (VNET_TX_RING_SIZE *
-	       (sizeof(struct vio_net_desc) +
-		(sizeof(struct ldc_trans_cookie) * 2)));
-
-	ncookies = VIO_MAX_RING_COOKIES;
-	dring = ldc_alloc_exp_dring(port->vio.lp, len,
-				    dr->cookies, &ncookies,
-				    (LDC_MAP_SHADOW |
-				     LDC_MAP_DIRECT |
-				     LDC_MAP_RW));
-	if (IS_ERR(dring)) {
-		err = PTR_ERR(dring);
-		goto err_out;
-	}
-
-	dr->base = dring;
-	dr->entry_size = (sizeof(struct vio_net_desc) +
-			  (sizeof(struct ldc_trans_cookie) * 2));
-	dr->num_entries = VNET_TX_RING_SIZE;
-	dr->prod = dr->cons = 0;
-	dr->pending = VNET_TX_RING_SIZE;
-	dr->ncookies = ncookies;
-
-	return 0;
-
-err_out:
-	vnet_port_free_tx_bufs(port);
-
-	return err;
-}
-
-static LIST_HEAD(vnet_list);
-static DEFINE_MUTEX(vnet_list_mutex);
-
-static const struct net_device_ops vnet_ops = {
-	.ndo_open		= vnet_open,
-	.ndo_stop		= vnet_close,
-	.ndo_set_multicast_list	= vnet_set_rx_mode,
-	.ndo_set_mac_address	= vnet_set_mac_addr,
-	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_tx_timeout		= vnet_tx_timeout,
-	.ndo_change_mtu		= vnet_change_mtu,
-	.ndo_start_xmit		= vnet_start_xmit,
-};
-
-static struct vnet * __devinit vnet_new(const u64 *local_mac)
-{
-	struct net_device *dev;
-	struct vnet *vp;
-	int err, i;
-
-	dev = alloc_etherdev(sizeof(*vp));
-	if (!dev) {
-		pr_err("Etherdev alloc failed, aborting\n");
-		return ERR_PTR(-ENOMEM);
-	}
-
-	for (i = 0; i < ETH_ALEN; i++)
-		dev->dev_addr[i] = (*local_mac >> (5 - i) * 8) & 0xff;
-
-	memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
-
-	vp = netdev_priv(dev);
-
-	spin_lock_init(&vp->lock);
-	vp->dev = dev;
-
-	INIT_LIST_HEAD(&vp->port_list);
-	for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
-		INIT_HLIST_HEAD(&vp->port_hash[i]);
-	INIT_LIST_HEAD(&vp->list);
-	vp->local_mac = *local_mac;
-
-	dev->netdev_ops = &vnet_ops;
-	dev->ethtool_ops = &vnet_ethtool_ops;
-	dev->watchdog_timeo = VNET_TX_TIMEOUT;
-
-	err = register_netdev(dev);
-	if (err) {
-		pr_err("Cannot register net device, aborting\n");
-		goto err_out_free_dev;
-	}
-
-	netdev_info(dev, "Sun LDOM vnet %pM\n", dev->dev_addr);
-
-	list_add(&vp->list, &vnet_list);
-
-	return vp;
-
-err_out_free_dev:
-	free_netdev(dev);
-
-	return ERR_PTR(err);
-}
-
-static struct vnet * __devinit vnet_find_or_create(const u64 *local_mac)
-{
-	struct vnet *iter, *vp;
-
-	mutex_lock(&vnet_list_mutex);
-	vp = NULL;
-	list_for_each_entry(iter, &vnet_list, list) {
-		if (iter->local_mac == *local_mac) {
-			vp = iter;
-			break;
-		}
-	}
-	if (!vp)
-		vp = vnet_new(local_mac);
-	mutex_unlock(&vnet_list_mutex);
-
-	return vp;
-}
-
-static const char *local_mac_prop = "local-mac-address";
-
-static struct vnet * __devinit vnet_find_parent(struct mdesc_handle *hp,
-						u64 port_node)
-{
-	const u64 *local_mac = NULL;
-	u64 a;
-
-	mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
-		u64 target = mdesc_arc_target(hp, a);
-		const char *name;
-
-		name = mdesc_get_property(hp, target, "name", NULL);
-		if (!name || strcmp(name, "network"))
-			continue;
-
-		local_mac = mdesc_get_property(hp, target,
-					       local_mac_prop, NULL);
-		if (local_mac)
-			break;
-	}
-	if (!local_mac)
-		return ERR_PTR(-ENODEV);
-
-	return vnet_find_or_create(local_mac);
-}
-
-static struct ldc_channel_config vnet_ldc_cfg = {
-	.event		= vnet_event,
-	.mtu		= 64,
-	.mode		= LDC_MODE_UNRELIABLE,
-};
-
-static struct vio_driver_ops vnet_vio_ops = {
-	.send_attr		= vnet_send_attr,
-	.handle_attr		= vnet_handle_attr,
-	.handshake_complete	= vnet_handshake_complete,
-};
-
-static void __devinit print_version(void)
-{
-	printk_once(KERN_INFO "%s", version);
-}
-
-const char *remote_macaddr_prop = "remote-mac-address";
-
-static int __devinit vnet_port_probe(struct vio_dev *vdev,
-				     const struct vio_device_id *id)
-{
-	struct mdesc_handle *hp;
-	struct vnet_port *port;
-	unsigned long flags;
-	struct vnet *vp;
-	const u64 *rmac;
-	int len, i, err, switch_port;
-
-	print_version();
-
-	hp = mdesc_grab();
-
-	vp = vnet_find_parent(hp, vdev->mp);
-	if (IS_ERR(vp)) {
-		pr_err("Cannot find port parent vnet\n");
-		err = PTR_ERR(vp);
-		goto err_out_put_mdesc;
-	}
-
-	rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
-	err = -ENODEV;
-	if (!rmac) {
-		pr_err("Port lacks %s property\n", remote_macaddr_prop);
-		goto err_out_put_mdesc;
-	}
-
-	port = kzalloc(sizeof(*port), GFP_KERNEL);
-	err = -ENOMEM;
-	if (!port) {
-		pr_err("Cannot allocate vnet_port\n");
-		goto err_out_put_mdesc;
-	}
-
-	for (i = 0; i < ETH_ALEN; i++)
-		port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;
-
-	port->vp = vp;
-
-	err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
-			      vnet_versions, ARRAY_SIZE(vnet_versions),
-			      &vnet_vio_ops, vp->dev->name);
-	if (err)
-		goto err_out_free_port;
-
-	err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port);
-	if (err)
-		goto err_out_free_port;
-
-	err = vnet_port_alloc_tx_bufs(port);
-	if (err)
-		goto err_out_free_ldc;
-
-	INIT_HLIST_NODE(&port->hash);
-	INIT_LIST_HEAD(&port->list);
-
-	switch_port = 0;
-	if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL) != NULL)
-		switch_port = 1;
-	port->switch_port = switch_port;
-
-	spin_lock_irqsave(&vp->lock, flags);
-	if (switch_port)
-		list_add(&port->list, &vp->port_list);
-	else
-		list_add_tail(&port->list, &vp->port_list);
-	hlist_add_head(&port->hash, &vp->port_hash[vnet_hashfn(port->raddr)]);
-	spin_unlock_irqrestore(&vp->lock, flags);
-
-	dev_set_drvdata(&vdev->dev, port);
-
-	pr_info("%s: PORT ( remote-mac %pM%s )\n",
-		vp->dev->name, port->raddr, switch_port ? " switch-port" : "");
-
-	vio_port_up(&port->vio);
-
-	mdesc_release(hp);
-
-	return 0;
-
-err_out_free_ldc:
-	vio_ldc_free(&port->vio);
-
-err_out_free_port:
-	kfree(port);
-
-err_out_put_mdesc:
-	mdesc_release(hp);
-	return err;
-}
-
-static int vnet_port_remove(struct vio_dev *vdev)
-{
-	struct vnet_port *port = dev_get_drvdata(&vdev->dev);
-
-	if (port) {
-		struct vnet *vp = port->vp;
-		unsigned long flags;
-
-		del_timer_sync(&port->vio.timer);
-
-		spin_lock_irqsave(&vp->lock, flags);
-		list_del(&port->list);
-		hlist_del(&port->hash);
-		spin_unlock_irqrestore(&vp->lock, flags);
-
-		vnet_port_free_tx_bufs(port);
-		vio_ldc_free(&port->vio);
-
-		dev_set_drvdata(&vdev->dev, NULL);
-
-		kfree(port);
-	}
-	return 0;
-}
-
-static const struct vio_device_id vnet_port_match[] = {
-	{
-		.type = "vnet-port",
-	},
-	{},
-};
-MODULE_DEVICE_TABLE(vio, vnet_port_match);
-
-static struct vio_driver vnet_port_driver = {
-	.id_table	= vnet_port_match,
-	.probe		= vnet_port_probe,
-	.remove		= vnet_port_remove,
-	.driver		= {
-		.name	= "vnet_port",
-		.owner	= THIS_MODULE,
-	}
-};
-
-static int __init vnet_init(void)
-{
-	return vio_register_driver(&vnet_port_driver);
-}
-
-static void __exit vnet_exit(void)
-{
-	vio_unregister_driver(&vnet_port_driver);
-}
-
-module_init(vnet_init);
-module_exit(vnet_exit);