1 /* sunvnet.c: Sun LDOM Virtual Network Driver.
3 * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/types.h>
9 #include <linux/slab.h>
10 #include <linux/delay.h>
11 #include <linux/init.h>
12 #include <linux/netdevice.h>
13 #include <linux/ethtool.h>
14 #include <linux/etherdevice.h>
21 #define DRV_MODULE_NAME "sunvnet"
22 #define PFX DRV_MODULE_NAME ": "
23 #define DRV_MODULE_VERSION "1.0"
24 #define DRV_MODULE_RELDATE "June 25, 2007"
26 static char version[] __devinitdata =
27 DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
28 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
29 MODULE_DESCRIPTION("Sun LDOM virtual network driver");
30 MODULE_LICENSE("GPL");
31 MODULE_VERSION(DRV_MODULE_VERSION);
33 /* Ordered from largest major to lowest */
34 static struct vio_version vnet_versions[] = {
35 { .major = 1, .minor = 0 },
38 static inline u32 vnet_tx_dring_avail(struct vio_dring_state *dr)
40 return vio_dring_avail(dr, VNET_TX_RING_SIZE);
43 static int vnet_handle_unknown(struct vnet_port *port, void *arg)
45 struct vio_msg_tag *pkt = arg;
47 printk(KERN_ERR PFX "Received unknown msg [%02x:%02x:%04x:%08x]\n",
48 pkt->type, pkt->stype, pkt->stype_env, pkt->sid);
49 printk(KERN_ERR PFX "Resetting connection.\n");
51 ldc_disconnect(port->vio.lp);
56 static int vnet_send_attr(struct vio_driver_state *vio)
58 struct vnet_port *port = to_vnet_port(vio);
59 struct net_device *dev = port->vp->dev;
60 struct vio_net_attr_info pkt;
63 memset(&pkt, 0, sizeof(pkt));
64 pkt.tag.type = VIO_TYPE_CTRL;
65 pkt.tag.stype = VIO_SUBTYPE_INFO;
66 pkt.tag.stype_env = VIO_ATTR_INFO;
67 pkt.tag.sid = vio_send_sid(vio);
68 pkt.xfer_mode = VIO_DRING_MODE;
69 pkt.addr_type = VNET_ADDR_ETHERMAC;
71 for (i = 0; i < 6; i++)
72 pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8);
73 pkt.mtu = ETH_FRAME_LEN;
75 viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] "
76 "ackfreq[%u] mtu[%llu]\n",
77 pkt.xfer_mode, pkt.addr_type,
78 (unsigned long long) pkt.addr,
80 (unsigned long long) pkt.mtu);
82 return vio_ldc_send(vio, &pkt, sizeof(pkt));
85 static int handle_attr_info(struct vio_driver_state *vio,
86 struct vio_net_attr_info *pkt)
88 viodbg(HS, "GOT NET ATTR INFO xmode[0x%x] atype[0x%x] addr[%llx] "
89 "ackfreq[%u] mtu[%llu]\n",
90 pkt->xfer_mode, pkt->addr_type,
91 (unsigned long long) pkt->addr,
93 (unsigned long long) pkt->mtu);
95 pkt->tag.sid = vio_send_sid(vio);
97 if (pkt->xfer_mode != VIO_DRING_MODE ||
98 pkt->addr_type != VNET_ADDR_ETHERMAC ||
99 pkt->mtu != ETH_FRAME_LEN) {
100 viodbg(HS, "SEND NET ATTR NACK\n");
102 pkt->tag.stype = VIO_SUBTYPE_NACK;
104 (void) vio_ldc_send(vio, pkt, sizeof(*pkt));
108 viodbg(HS, "SEND NET ATTR ACK\n");
110 pkt->tag.stype = VIO_SUBTYPE_ACK;
112 return vio_ldc_send(vio, pkt, sizeof(*pkt));
117 static int handle_attr_ack(struct vio_driver_state *vio,
118 struct vio_net_attr_info *pkt)
120 viodbg(HS, "GOT NET ATTR ACK\n");
125 static int handle_attr_nack(struct vio_driver_state *vio,
126 struct vio_net_attr_info *pkt)
128 viodbg(HS, "GOT NET ATTR NACK\n");
133 static int vnet_handle_attr(struct vio_driver_state *vio, void *arg)
135 struct vio_net_attr_info *pkt = arg;
137 switch (pkt->tag.stype) {
138 case VIO_SUBTYPE_INFO:
139 return handle_attr_info(vio, pkt);
141 case VIO_SUBTYPE_ACK:
142 return handle_attr_ack(vio, pkt);
144 case VIO_SUBTYPE_NACK:
145 return handle_attr_nack(vio, pkt);
152 static void vnet_handshake_complete(struct vio_driver_state *vio)
154 struct vio_dring_state *dr;
156 dr = &vio->drings[VIO_DRIVER_RX_RING];
157 dr->snd_nxt = dr->rcv_nxt = 1;
159 dr = &vio->drings[VIO_DRIVER_TX_RING];
160 dr->snd_nxt = dr->rcv_nxt = 1;
163 /* The hypervisor interface that implements copying to/from imported
164 * memory from another domain requires that copies are done to 8-byte
165 * aligned buffers, and that the lengths of such copies are also 8-byte
168 * So we align skb->data to an 8-byte multiple and pad-out the data
169 * area so we can round the copy length up to the next multiple of
172 * The transmitter puts the actual start of the packet 6 bytes into
173 * the buffer it sends over, so that the IP headers after the ethernet
174 * header are aligned properly. These 6 bytes are not in the descriptor
175 * length, they are simply implied. This offset is represented using
176 * the VNET_PACKET_SKIP macro.
178 static struct sk_buff *alloc_and_align_skb(struct net_device *dev,
181 struct sk_buff *skb = netdev_alloc_skb(dev, len+VNET_PACKET_SKIP+8+8);
182 unsigned long addr, off;
187 addr = (unsigned long) skb->data;
188 off = ((addr + 7UL) & ~7UL) - addr;
190 skb_reserve(skb, off);
195 static int vnet_rx_one(struct vnet_port *port, unsigned int len,
196 struct ldc_trans_cookie *cookies, int ncookies)
198 struct net_device *dev = port->vp->dev;
199 unsigned int copy_len;
204 if (unlikely(len < ETH_ZLEN || len > ETH_FRAME_LEN)) {
205 dev->stats.rx_length_errors++;
209 skb = alloc_and_align_skb(dev, len);
211 if (unlikely(!skb)) {
212 dev->stats.rx_missed_errors++;
216 copy_len = (len + VNET_PACKET_SKIP + 7U) & ~7U;
217 skb_put(skb, copy_len);
218 err = ldc_copy(port->vio.lp, LDC_COPY_IN,
219 skb->data, copy_len, 0,
221 if (unlikely(err < 0)) {
222 dev->stats.rx_frame_errors++;
226 skb_pull(skb, VNET_PACKET_SKIP);
228 skb->protocol = eth_type_trans(skb, dev);
230 dev->stats.rx_packets++;
231 dev->stats.rx_bytes += len;
241 dev->stats.rx_dropped++;
245 static int vnet_send_ack(struct vnet_port *port, struct vio_dring_state *dr,
246 u32 start, u32 end, u8 vio_dring_state)
248 struct vio_dring_data hdr = {
250 .type = VIO_TYPE_DATA,
251 .stype = VIO_SUBTYPE_ACK,
252 .stype_env = VIO_DRING_DATA,
253 .sid = vio_send_sid(&port->vio),
255 .dring_ident = dr->ident,
258 .state = vio_dring_state,
262 hdr.seq = dr->snd_nxt;
265 err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr));
271 if ((delay <<= 1) > 128)
273 } while (err == -EAGAIN);
278 static u32 next_idx(u32 idx, struct vio_dring_state *dr)
280 if (++idx == dr->num_entries)
285 static u32 prev_idx(u32 idx, struct vio_dring_state *dr)
288 idx = dr->num_entries - 1;
295 static struct vio_net_desc *get_rx_desc(struct vnet_port *port,
296 struct vio_dring_state *dr,
299 struct vio_net_desc *desc = port->vio.desc_buf;
302 err = ldc_get_dring_entry(port->vio.lp, desc, dr->entry_size,
303 (index * dr->entry_size),
304 dr->cookies, dr->ncookies);
311 static int put_rx_desc(struct vnet_port *port,
312 struct vio_dring_state *dr,
313 struct vio_net_desc *desc,
318 err = ldc_put_dring_entry(port->vio.lp, desc, dr->entry_size,
319 (index * dr->entry_size),
320 dr->cookies, dr->ncookies);
327 static int vnet_walk_rx_one(struct vnet_port *port,
328 struct vio_dring_state *dr,
329 u32 index, int *needs_ack)
331 struct vio_net_desc *desc = get_rx_desc(port, dr, index);
332 struct vio_driver_state *vio = &port->vio;
336 return PTR_ERR(desc);
338 viodbg(DATA, "vio_walk_rx_one desc[%02x:%02x:%08x:%08x:%lx:%lx]\n",
339 desc->hdr.state, desc->hdr.ack,
340 desc->size, desc->ncookies,
341 desc->cookies[0].cookie_addr,
342 desc->cookies[0].cookie_size);
344 if (desc->hdr.state != VIO_DESC_READY)
346 err = vnet_rx_one(port, desc->size, desc->cookies, desc->ncookies);
347 if (err == -ECONNRESET)
349 desc->hdr.state = VIO_DESC_DONE;
350 err = put_rx_desc(port, dr, desc, index);
353 *needs_ack = desc->hdr.ack;
357 static int vnet_walk_rx(struct vnet_port *port, struct vio_dring_state *dr,
360 struct vio_driver_state *vio = &port->vio;
361 int ack_start = -1, ack_end = -1;
363 end = (end == (u32) -1) ? prev_idx(start, dr) : next_idx(end, dr);
365 viodbg(DATA, "vnet_walk_rx start[%08x] end[%08x]\n", start, end);
367 while (start != end) {
368 int ack = 0, err = vnet_walk_rx_one(port, dr, start, &ack);
369 if (err == -ECONNRESET)
376 start = next_idx(start, dr);
377 if (ack && start != end) {
378 err = vnet_send_ack(port, dr, ack_start, ack_end,
380 if (err == -ECONNRESET)
385 if (unlikely(ack_start == -1))
386 ack_start = ack_end = prev_idx(start, dr);
387 return vnet_send_ack(port, dr, ack_start, ack_end, VIO_DRING_STOPPED);
390 static int vnet_rx(struct vnet_port *port, void *msgbuf)
392 struct vio_dring_data *pkt = msgbuf;
393 struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_RX_RING];
394 struct vio_driver_state *vio = &port->vio;
396 viodbg(DATA, "vnet_rx stype_env[%04x] seq[%016lx] rcv_nxt[%016lx]\n",
397 pkt->tag.stype_env, pkt->seq, dr->rcv_nxt);
399 if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA))
401 if (unlikely(pkt->seq != dr->rcv_nxt)) {
402 printk(KERN_ERR PFX "RX out of sequence seq[0x%lx] "
403 "rcv_nxt[0x%lx]\n", pkt->seq, dr->rcv_nxt);
409 /* XXX Validate pkt->start_idx and pkt->end_idx XXX */
411 return vnet_walk_rx(port, dr, pkt->start_idx, pkt->end_idx);
414 static int idx_is_pending(struct vio_dring_state *dr, u32 end)
419 while (idx != dr->prod) {
424 idx = next_idx(idx, dr);
429 static int vnet_ack(struct vnet_port *port, void *msgbuf)
431 struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
432 struct vio_dring_data *pkt = msgbuf;
433 struct net_device *dev;
437 if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA))
441 if (unlikely(!idx_is_pending(dr, end)))
444 dr->cons = next_idx(end, dr);
448 if (unlikely(netif_queue_stopped(dev) &&
449 vnet_tx_dring_avail(dr) >= VNET_TX_WAKEUP_THRESH(dr)))
455 static int vnet_nack(struct vnet_port *port, void *msgbuf)
457 /* XXX just reset or similar XXX */
461 static void maybe_tx_wakeup(struct vnet *vp)
463 struct net_device *dev = vp->dev;
466 if (likely(netif_queue_stopped(dev))) {
467 struct vnet_port *port;
470 list_for_each_entry(port, &vp->port_list, list) {
471 struct vio_dring_state *dr;
473 dr = &port->vio.drings[VIO_DRIVER_TX_RING];
474 if (vnet_tx_dring_avail(dr) <
475 VNET_TX_WAKEUP_THRESH(dr)) {
481 netif_wake_queue(dev);
483 netif_tx_unlock(dev);
486 static void vnet_event(void *arg, int event)
488 struct vnet_port *port = arg;
489 struct vio_driver_state *vio = &port->vio;
493 spin_lock_irqsave(&vio->lock, flags);
495 if (unlikely(event == LDC_EVENT_RESET ||
496 event == LDC_EVENT_UP)) {
497 vio_link_state_change(vio, event);
498 spin_unlock_irqrestore(&vio->lock, flags);
503 if (unlikely(event != LDC_EVENT_DATA_READY)) {
504 printk(KERN_WARNING PFX "Unexpected LDC event %d\n", event);
505 spin_unlock_irqrestore(&vio->lock, flags);
512 struct vio_msg_tag tag;
516 err = ldc_read(vio->lp, &msgbuf, sizeof(msgbuf));
517 if (unlikely(err < 0)) {
518 if (err == -ECONNRESET)
524 viodbg(DATA, "TAG [%02x:%02x:%04x:%08x]\n",
527 msgbuf.tag.stype_env,
529 err = vio_validate_sid(vio, &msgbuf.tag);
533 if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) {
534 if (msgbuf.tag.stype == VIO_SUBTYPE_INFO) {
535 err = vnet_rx(port, &msgbuf);
536 } else if (msgbuf.tag.stype == VIO_SUBTYPE_ACK) {
537 err = vnet_ack(port, &msgbuf);
540 } else if (msgbuf.tag.stype == VIO_SUBTYPE_NACK) {
541 err = vnet_nack(port, &msgbuf);
543 } else if (msgbuf.tag.type == VIO_TYPE_CTRL) {
544 err = vio_control_pkt_engine(vio, &msgbuf);
548 err = vnet_handle_unknown(port, &msgbuf);
550 if (err == -ECONNRESET)
553 spin_unlock(&vio->lock);
554 if (unlikely(tx_wakeup && err != -ECONNRESET))
555 maybe_tx_wakeup(port->vp);
556 local_irq_restore(flags);
559 static int __vnet_tx_trigger(struct vnet_port *port)
561 struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
562 struct vio_dring_data hdr = {
564 .type = VIO_TYPE_DATA,
565 .stype = VIO_SUBTYPE_INFO,
566 .stype_env = VIO_DRING_DATA,
567 .sid = vio_send_sid(&port->vio),
569 .dring_ident = dr->ident,
570 .start_idx = dr->prod,
575 hdr.seq = dr->snd_nxt;
578 err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr));
584 if ((delay <<= 1) > 128)
586 } while (err == -EAGAIN);
591 struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
593 unsigned int hash = vnet_hashfn(skb->data);
594 struct hlist_head *hp = &vp->port_hash[hash];
595 struct hlist_node *n;
596 struct vnet_port *port;
598 hlist_for_each_entry(port, n, hp, hash) {
599 if (!compare_ether_addr(port->raddr, skb->data))
603 if (!list_empty(&vp->port_list))
604 port = list_entry(vp->port_list.next, struct vnet_port, list);
609 struct vnet_port *tx_port_find(struct vnet *vp, struct sk_buff *skb)
611 struct vnet_port *ret;
614 spin_lock_irqsave(&vp->lock, flags);
615 ret = __tx_port_find(vp, skb);
616 spin_unlock_irqrestore(&vp->lock, flags);
621 static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
623 struct vnet *vp = netdev_priv(dev);
624 struct vnet_port *port = tx_port_find(vp, skb);
625 struct vio_dring_state *dr;
626 struct vio_net_desc *d;
635 spin_lock_irqsave(&port->vio.lock, flags);
637 dr = &port->vio.drings[VIO_DRIVER_TX_RING];
638 if (unlikely(vnet_tx_dring_avail(dr) < 2)) {
639 if (!netif_queue_stopped(dev)) {
640 netif_stop_queue(dev);
642 /* This is a hard error, log it. */
643 printk(KERN_ERR PFX "%s: BUG! Tx Ring full when "
644 "queue awake!\n", dev->name);
645 dev->stats.tx_errors++;
647 spin_unlock_irqrestore(&port->vio.lock, flags);
648 return NETDEV_TX_BUSY;
651 d = vio_dring_cur(dr);
653 tx_buf = port->tx_bufs[dr->prod].buf;
654 skb_copy_from_linear_data(skb, tx_buf + VNET_PACKET_SKIP, skb->len);
657 if (len < ETH_ZLEN) {
659 memset(tx_buf+VNET_PACKET_SKIP+skb->len, 0, len - skb->len);
662 d->hdr.ack = VIO_ACK_ENABLE;
664 d->ncookies = port->tx_bufs[dr->prod].ncookies;
665 for (i = 0; i < d->ncookies; i++)
666 d->cookies[i] = port->tx_bufs[dr->prod].cookies[i];
668 /* This has to be a non-SMP write barrier because we are writing
669 * to memory which is shared with the peer LDOM.
673 d->hdr.state = VIO_DESC_READY;
675 err = __vnet_tx_trigger(port);
676 if (unlikely(err < 0)) {
677 printk(KERN_INFO PFX "%s: TX trigger error %d\n",
679 d->hdr.state = VIO_DESC_FREE;
680 dev->stats.tx_carrier_errors++;
681 goto out_dropped_unlock;
684 dev->stats.tx_packets++;
685 dev->stats.tx_bytes += skb->len;
687 dr->prod = (dr->prod + 1) & (VNET_TX_RING_SIZE - 1);
688 if (unlikely(vnet_tx_dring_avail(dr) < 2)) {
689 netif_stop_queue(dev);
690 if (vnet_tx_dring_avail(dr) > VNET_TX_WAKEUP_THRESH(dr))
691 netif_wake_queue(dev);
694 spin_unlock_irqrestore(&port->vio.lock, flags);
698 dev->trans_start = jiffies;
702 spin_unlock_irqrestore(&port->vio.lock, flags);
706 dev->stats.tx_dropped++;
710 static void vnet_tx_timeout(struct net_device *dev)
712 /* XXX Implement me XXX */
715 static int vnet_open(struct net_device *dev)
717 netif_carrier_on(dev);
718 netif_start_queue(dev);
723 static int vnet_close(struct net_device *dev)
725 netif_stop_queue(dev);
726 netif_carrier_off(dev);
731 static void vnet_set_rx_mode(struct net_device *dev)
733 /* XXX Implement multicast support XXX */
736 static int vnet_change_mtu(struct net_device *dev, int new_mtu)
738 if (new_mtu != ETH_DATA_LEN)
745 static int vnet_set_mac_addr(struct net_device *dev, void *p)
750 static void vnet_get_drvinfo(struct net_device *dev,
751 struct ethtool_drvinfo *info)
753 strcpy(info->driver, DRV_MODULE_NAME);
754 strcpy(info->version, DRV_MODULE_VERSION);
757 static u32 vnet_get_msglevel(struct net_device *dev)
759 struct vnet *vp = netdev_priv(dev);
760 return vp->msg_enable;
763 static void vnet_set_msglevel(struct net_device *dev, u32 value)
765 struct vnet *vp = netdev_priv(dev);
766 vp->msg_enable = value;
769 static const struct ethtool_ops vnet_ethtool_ops = {
770 .get_drvinfo = vnet_get_drvinfo,
771 .get_msglevel = vnet_get_msglevel,
772 .set_msglevel = vnet_set_msglevel,
773 .get_link = ethtool_op_get_link,
774 .get_perm_addr = ethtool_op_get_perm_addr,
777 static void vnet_port_free_tx_bufs(struct vnet_port *port)
779 struct vio_dring_state *dr;
782 dr = &port->vio.drings[VIO_DRIVER_TX_RING];
784 ldc_free_exp_dring(port->vio.lp, dr->base,
785 (dr->entry_size * dr->num_entries),
786 dr->cookies, dr->ncookies);
794 for (i = 0; i < VNET_TX_RING_SIZE; i++) {
795 void *buf = port->tx_bufs[i].buf;
800 ldc_unmap(port->vio.lp,
801 port->tx_bufs[i].cookies,
802 port->tx_bufs[i].ncookies);
805 port->tx_bufs[i].buf = NULL;
809 static int __devinit vnet_port_alloc_tx_bufs(struct vnet_port *port)
811 struct vio_dring_state *dr;
813 int i, err, ncookies;
816 for (i = 0; i < VNET_TX_RING_SIZE; i++) {
817 void *buf = kzalloc(ETH_FRAME_LEN + 8, GFP_KERNEL);
818 int map_len = (ETH_FRAME_LEN + 7) & ~7;
822 printk(KERN_ERR "TX buffer allocation failure\n");
826 if ((unsigned long)buf & (8UL - 1)) {
827 printk(KERN_ERR "TX buffer misaligned\n");
832 err = ldc_map_single(port->vio.lp, buf, map_len,
833 port->tx_bufs[i].cookies, 2,
841 port->tx_bufs[i].buf = buf;
842 port->tx_bufs[i].ncookies = err;
845 dr = &port->vio.drings[VIO_DRIVER_TX_RING];
847 len = (VNET_TX_RING_SIZE *
848 (sizeof(struct vio_net_desc) +
849 (sizeof(struct ldc_trans_cookie) * 2)));
851 ncookies = VIO_MAX_RING_COOKIES;
852 dring = ldc_alloc_exp_dring(port->vio.lp, len,
853 dr->cookies, &ncookies,
858 err = PTR_ERR(dring);
863 dr->entry_size = (sizeof(struct vio_net_desc) +
864 (sizeof(struct ldc_trans_cookie) * 2));
865 dr->num_entries = VNET_TX_RING_SIZE;
866 dr->prod = dr->cons = 0;
867 dr->pending = VNET_TX_RING_SIZE;
868 dr->ncookies = ncookies;
873 vnet_port_free_tx_bufs(port);
878 static struct ldc_channel_config vnet_ldc_cfg = {
881 .mode = LDC_MODE_UNRELIABLE,
884 static struct vio_driver_ops vnet_vio_ops = {
885 .send_attr = vnet_send_attr,
886 .handle_attr = vnet_handle_attr,
887 .handshake_complete = vnet_handshake_complete,
890 const char *remote_macaddr_prop = "remote-mac-address";
892 static int __devinit vnet_port_probe(struct vio_dev *vdev,
893 const struct vio_device_id *id)
895 struct mdesc_handle *hp;
896 struct vnet_port *port;
900 int len, i, err, switch_port;
902 vp = dev_get_drvdata(vdev->dev.parent);
904 printk(KERN_ERR PFX "Cannot find port parent vnet.\n");
910 rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
913 printk(KERN_ERR PFX "Port lacks %s property.\n",
914 remote_macaddr_prop);
915 goto err_out_put_mdesc;
918 port = kzalloc(sizeof(*port), GFP_KERNEL);
921 printk(KERN_ERR PFX "Cannot allocate vnet_port.\n");
922 goto err_out_put_mdesc;
925 for (i = 0; i < ETH_ALEN; i++)
926 port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;
930 err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
931 vnet_versions, ARRAY_SIZE(vnet_versions),
932 &vnet_vio_ops, vp->dev->name);
934 goto err_out_free_port;
936 err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port);
938 goto err_out_free_port;
940 err = vnet_port_alloc_tx_bufs(port);
942 goto err_out_free_ldc;
944 INIT_HLIST_NODE(&port->hash);
945 INIT_LIST_HEAD(&port->list);
948 if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL) != NULL)
951 spin_lock_irqsave(&vp->lock, flags);
953 list_add(&port->list, &vp->port_list);
955 list_add_tail(&port->list, &vp->port_list);
956 hlist_add_head(&port->hash, &vp->port_hash[vnet_hashfn(port->raddr)]);
957 spin_unlock_irqrestore(&vp->lock, flags);
959 dev_set_drvdata(&vdev->dev, port);
961 printk(KERN_INFO "%s: PORT ( remote-mac ", vp->dev->name);
962 for (i = 0; i < 6; i++)
963 printk("%2.2x%c", port->raddr[i], i == 5 ? ' ' : ':');
965 printk("switch-port ");
968 vio_port_up(&port->vio);
975 vio_ldc_free(&port->vio);
985 static int vnet_port_remove(struct vio_dev *vdev)
987 struct vnet_port *port = dev_get_drvdata(&vdev->dev);
990 struct vnet *vp = port->vp;
993 del_timer_sync(&port->vio.timer);
995 spin_lock_irqsave(&vp->lock, flags);
996 list_del(&port->list);
997 hlist_del(&port->hash);
998 spin_unlock_irqrestore(&vp->lock, flags);
1000 vnet_port_free_tx_bufs(port);
1001 vio_ldc_free(&port->vio);
1003 dev_set_drvdata(&vdev->dev, NULL);
1010 static struct vio_device_id vnet_port_match[] = {
1012 .type = "vnet-port",
1016 MODULE_DEVICE_TABLE(vio, vnet_match);
1018 static struct vio_driver vnet_port_driver = {
1019 .id_table = vnet_port_match,
1020 .probe = vnet_port_probe,
1021 .remove = vnet_port_remove,
1023 .name = "vnet_port",
1024 .owner = THIS_MODULE,
1028 const char *local_mac_prop = "local-mac-address";
1030 static int __devinit vnet_probe(struct vio_dev *vdev,
1031 const struct vio_device_id *id)
1033 static int vnet_version_printed;
1034 struct mdesc_handle *hp;
1035 struct net_device *dev;
1040 if (vnet_version_printed++ == 0)
1041 printk(KERN_INFO "%s", version);
1045 mac = mdesc_get_property(hp, vdev->mp, local_mac_prop, &len);
1047 printk(KERN_ERR PFX "vnet lacks %s property.\n",
1053 dev = alloc_etherdev(sizeof(*vp));
1055 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1060 for (i = 0; i < ETH_ALEN; i++)
1061 dev->dev_addr[i] = (*mac >> (5 - i) * 8) & 0xff;
1063 memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
1065 SET_NETDEV_DEV(dev, &vdev->dev);
1067 vp = netdev_priv(dev);
1069 spin_lock_init(&vp->lock);
1073 INIT_LIST_HEAD(&vp->port_list);
1074 for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
1075 INIT_HLIST_HEAD(&vp->port_hash[i]);
1077 dev->open = vnet_open;
1078 dev->stop = vnet_close;
1079 dev->set_multicast_list = vnet_set_rx_mode;
1080 dev->set_mac_address = vnet_set_mac_addr;
1081 dev->tx_timeout = vnet_tx_timeout;
1082 dev->ethtool_ops = &vnet_ethtool_ops;
1083 dev->watchdog_timeo = VNET_TX_TIMEOUT;
1084 dev->change_mtu = vnet_change_mtu;
1085 dev->hard_start_xmit = vnet_start_xmit;
1087 err = register_netdev(dev);
1089 printk(KERN_ERR PFX "Cannot register net device, "
1091 goto err_out_free_dev;
1094 printk(KERN_INFO "%s: Sun LDOM vnet ", dev->name);
1096 for (i = 0; i < 6; i++)
1097 printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':');
1099 dev_set_drvdata(&vdev->dev, vp);
1113 static int vnet_remove(struct vio_dev *vdev)
1116 struct vnet *vp = dev_get_drvdata(&vdev->dev);
1119 /* XXX unregister port, or at least check XXX */
1120 unregister_netdevice(vp->dev);
1121 dev_set_drvdata(&vdev->dev, NULL);
1126 static struct vio_device_id vnet_match[] = {
1132 MODULE_DEVICE_TABLE(vio, vnet_match);
1134 static struct vio_driver vnet_driver = {
1135 .id_table = vnet_match,
1136 .probe = vnet_probe,
1137 .remove = vnet_remove,
1140 .owner = THIS_MODULE,
1144 static int __init vnet_init(void)
1146 int err = vio_register_driver(&vnet_driver);
1149 err = vio_register_driver(&vnet_port_driver);
1151 vio_unregister_driver(&vnet_driver);
1157 static void __exit vnet_exit(void)
1159 vio_unregister_driver(&vnet_port_driver);
1160 vio_unregister_driver(&vnet_driver);
1163 module_init(vnet_init);
1164 module_exit(vnet_exit);