1 /* File veth.c created by Kyle A. Lucke on Mon Aug 7 2000. */
3 * IBM eServer iSeries Virtual Ethernet Device Driver
4 * Copyright (C) 2001 Kyle A. Lucke (klucke@us.ibm.com), IBM Corp.
5 * Substantially cleaned up by:
6 * Copyright (C) 2003 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
7 * Copyright (C) 2004-2005 Michael Ellerman, IBM Corporation.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of the
12 * License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
25 * This module implements the virtual ethernet device for iSeries LPAR
26 * Linux. It uses hypervisor message passing to implement an
27 * ethernet-like network device communicating between partitions on
30 * The iSeries LPAR hypervisor currently allows for up to 16 different
31 * virtual ethernets. These are all dynamically configurable on
32 * OS/400 partitions, but dynamic configuration is not supported under
33 * Linux yet. An ethXX network device will be created for each
34 * virtual ethernet this partition is connected to.
36 * - This driver is responsible for routing packets to and from other
37 * partitions. The MAC addresses used by the virtual ethernets
38 * contains meaning and must not be modified.
40 * - Having 2 virtual ethernets to the same remote partition DOES NOT
41 * double the available bandwidth. The 2 devices will share the
42 * available hypervisor bandwidth.
44 * - If you send a packet to your own mac address, it will just be
45 * dropped, you won't get it on the receive side.
47 * - Multicast is implemented by sending the frame frame to every
48 * other partition. It is the responsibility of the receiving
49 * partition to filter the addresses desired.
53 * VETH_NUMBUFFERS: This compile time option defaults to 120. It
54 * controls how much memory Linux will allocate per remote partition
55 * it is communicating with. It can be thought of as the maximum
56 * number of packets outstanding to a remote partition at a time.
59 #include <linux/module.h>
60 #include <linux/types.h>
61 #include <linux/errno.h>
62 #include <linux/ioport.h>
63 #include <linux/kernel.h>
64 #include <linux/netdevice.h>
65 #include <linux/etherdevice.h>
66 #include <linux/skbuff.h>
67 #include <linux/init.h>
68 #include <linux/delay.h>
70 #include <linux/ethtool.h>
71 #include <linux/if_ether.h>
73 #include <asm/abs_addr.h>
74 #include <asm/iseries/mf.h>
75 #include <asm/uaccess.h>
76 #include <asm/firmware.h>
77 #include <asm/iseries/hv_lp_config.h>
78 #include <asm/iseries/hv_types.h>
79 #include <asm/iseries/hv_lp_event.h>
80 #include <asm/iommu.h>
85 MODULE_AUTHOR("Kyle Lucke <klucke@us.ibm.com>");
86 MODULE_DESCRIPTION("iSeries Virtual ethernet driver");
87 MODULE_LICENSE("GPL");
89 #define VETH_EVENT_CAP (0)
90 #define VETH_EVENT_FRAMES (1)
91 #define VETH_EVENT_MONITOR (2)
92 #define VETH_EVENT_FRAMES_ACK (3)
94 #define VETH_MAX_ACKS_PER_MSG (20)
95 #define VETH_MAX_FRAMES_PER_MSG (6)
97 struct veth_frames_data {
98 u32 addr[VETH_MAX_FRAMES_PER_MSG];
99 u16 len[VETH_MAX_FRAMES_PER_MSG];
102 #define VETH_EOF_SHIFT (32-VETH_MAX_FRAMES_PER_MSG)
104 struct veth_frames_ack_data {
105 u16 token[VETH_MAX_ACKS_PER_MSG];
108 struct veth_cap_data {
119 struct veth_lpevent {
120 struct HvLpEvent base_event;
122 struct veth_cap_data caps_data;
123 struct veth_frames_data frames_data;
124 struct veth_frames_ack_data frames_ack_data;
129 #define DRV_NAME "iseries_veth"
130 #define DRV_VERSION "2.0"
132 #define VETH_NUMBUFFERS (120)
133 #define VETH_ACKTIMEOUT (1000000) /* microseconds */
134 #define VETH_MAX_MCAST (12)
136 #define VETH_MAX_MTU (9000)
138 #if VETH_NUMBUFFERS < 10
139 #define ACK_THRESHOLD (1)
140 #elif VETH_NUMBUFFERS < 20
141 #define ACK_THRESHOLD (4)
142 #elif VETH_NUMBUFFERS < 40
143 #define ACK_THRESHOLD (10)
145 #define ACK_THRESHOLD (20)
148 #define VETH_STATE_SHUTDOWN (0x0001)
149 #define VETH_STATE_OPEN (0x0002)
150 #define VETH_STATE_RESET (0x0004)
151 #define VETH_STATE_SENTMON (0x0008)
152 #define VETH_STATE_SENTCAPS (0x0010)
153 #define VETH_STATE_GOTCAPACK (0x0020)
154 #define VETH_STATE_GOTCAPS (0x0040)
155 #define VETH_STATE_SENTCAPACK (0x0080)
156 #define VETH_STATE_READY (0x0100)
159 struct veth_msg *next;
160 struct veth_frames_data data;
167 struct veth_lpar_connection {
169 struct delayed_work statemachine_wq;
170 struct veth_msg *msgs;
172 struct veth_cap_data local_caps;
174 struct kobject kobject;
175 struct timer_list ack_timer;
177 struct timer_list reset_timer;
178 unsigned int reset_timeout;
179 unsigned long last_contact;
184 HvLpInstanceId src_inst;
185 HvLpInstanceId dst_inst;
186 struct veth_lpevent cap_event, cap_ack_event;
187 u16 pending_acks[VETH_MAX_ACKS_PER_MSG];
188 u32 num_pending_acks;
191 struct veth_cap_data remote_caps;
194 struct veth_msg *msg_stack_head;
200 HvLpIndexMap lpar_map;
202 /* queue_lock protects the stopped_map and dev's queue. */
203 spinlock_t queue_lock;
204 HvLpIndexMap stopped_map;
206 /* mcast_gate protects promiscuous, num_mcast & mcast_addr. */
210 u64 mcast_addr[VETH_MAX_MCAST];
212 struct kobject kobject;
215 static HvLpIndex this_lp;
216 static struct veth_lpar_connection *veth_cnx[HVMAXARCHITECTEDLPS]; /* = 0 */
217 static struct net_device *veth_dev[HVMAXARCHITECTEDVIRTUALLANS]; /* = 0 */
219 static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev);
220 static void veth_recycle_msg(struct veth_lpar_connection *, struct veth_msg *);
221 static void veth_wake_queues(struct veth_lpar_connection *cnx);
222 static void veth_stop_queues(struct veth_lpar_connection *cnx);
223 static void veth_receive(struct veth_lpar_connection *, struct veth_lpevent *);
224 static void veth_release_connection(struct kobject *kobject);
225 static void veth_timed_ack(unsigned long ptr);
226 static void veth_timed_reset(unsigned long ptr);
232 #define veth_info(fmt, args...) \
233 printk(KERN_INFO DRV_NAME ": " fmt, ## args)
235 #define veth_error(fmt, args...) \
236 printk(KERN_ERR DRV_NAME ": Error: " fmt, ## args)
239 #define veth_debug(fmt, args...) \
240 printk(KERN_DEBUG DRV_NAME ": " fmt, ## args)
242 #define veth_debug(fmt, args...) do {} while (0)
245 /* You must hold the connection's lock when you call this function. */
246 static inline void veth_stack_push(struct veth_lpar_connection *cnx,
247 struct veth_msg *msg)
249 msg->next = cnx->msg_stack_head;
250 cnx->msg_stack_head = msg;
253 /* You must hold the connection's lock when you call this function. */
254 static inline struct veth_msg *veth_stack_pop(struct veth_lpar_connection *cnx)
256 struct veth_msg *msg;
258 msg = cnx->msg_stack_head;
260 cnx->msg_stack_head = cnx->msg_stack_head->next;
265 /* You must hold the connection's lock when you call this function. */
266 static inline int veth_stack_is_empty(struct veth_lpar_connection *cnx)
268 return cnx->msg_stack_head == NULL;
271 static inline HvLpEvent_Rc
272 veth_signalevent(struct veth_lpar_connection *cnx, u16 subtype,
273 HvLpEvent_AckInd ackind, HvLpEvent_AckType acktype,
275 u64 data1, u64 data2, u64 data3, u64 data4, u64 data5)
277 return HvCallEvent_signalLpEventFast(cnx->remote_lp,
278 HvLpEvent_Type_VirtualLan,
279 subtype, ackind, acktype,
282 token, data1, data2, data3,
286 static inline HvLpEvent_Rc veth_signaldata(struct veth_lpar_connection *cnx,
287 u16 subtype, u64 token, void *data)
289 u64 *p = (u64 *) data;
291 return veth_signalevent(cnx, subtype, HvLpEvent_AckInd_NoAck,
292 HvLpEvent_AckType_ImmediateAck,
293 token, p[0], p[1], p[2], p[3], p[4]);
296 struct veth_allocation {
301 static void veth_complete_allocation(void *parm, int number)
303 struct veth_allocation *vc = (struct veth_allocation *)parm;
309 static int veth_allocate_events(HvLpIndex rlp, int number)
311 struct veth_allocation vc =
312 { COMPLETION_INITIALIZER_ONSTACK(vc.c), 0 };
314 mf_allocate_lp_events(rlp, HvLpEvent_Type_VirtualLan,
315 sizeof(struct veth_lpevent), number,
316 &veth_complete_allocation, &vc);
317 wait_for_completion(&vc.c);
326 struct veth_cnx_attribute {
327 struct attribute attr;
328 ssize_t (*show)(struct veth_lpar_connection *, char *buf);
329 ssize_t (*store)(struct veth_lpar_connection *, const char *buf);
332 static ssize_t veth_cnx_attribute_show(struct kobject *kobj,
333 struct attribute *attr, char *buf)
335 struct veth_cnx_attribute *cnx_attr;
336 struct veth_lpar_connection *cnx;
338 cnx_attr = container_of(attr, struct veth_cnx_attribute, attr);
339 cnx = container_of(kobj, struct veth_lpar_connection, kobject);
344 return cnx_attr->show(cnx, buf);
347 #define CUSTOM_CNX_ATTR(_name, _format, _expression) \
348 static ssize_t _name##_show(struct veth_lpar_connection *cnx, char *buf)\
350 return sprintf(buf, _format, _expression); \
352 struct veth_cnx_attribute veth_cnx_attr_##_name = __ATTR_RO(_name)
354 #define SIMPLE_CNX_ATTR(_name) \
355 CUSTOM_CNX_ATTR(_name, "%lu\n", (unsigned long)cnx->_name)
357 SIMPLE_CNX_ATTR(outstanding_tx);
358 SIMPLE_CNX_ATTR(remote_lp);
359 SIMPLE_CNX_ATTR(num_events);
360 SIMPLE_CNX_ATTR(src_inst);
361 SIMPLE_CNX_ATTR(dst_inst);
362 SIMPLE_CNX_ATTR(num_pending_acks);
363 SIMPLE_CNX_ATTR(num_ack_events);
364 CUSTOM_CNX_ATTR(ack_timeout, "%d\n", jiffies_to_msecs(cnx->ack_timeout));
365 CUSTOM_CNX_ATTR(reset_timeout, "%d\n", jiffies_to_msecs(cnx->reset_timeout));
366 CUSTOM_CNX_ATTR(state, "0x%.4lX\n", cnx->state);
367 CUSTOM_CNX_ATTR(last_contact, "%d\n", cnx->last_contact ?
368 jiffies_to_msecs(jiffies - cnx->last_contact) : 0);
370 #define GET_CNX_ATTR(_name) (&veth_cnx_attr_##_name.attr)
372 static struct attribute *veth_cnx_default_attrs[] = {
373 GET_CNX_ATTR(outstanding_tx),
374 GET_CNX_ATTR(remote_lp),
375 GET_CNX_ATTR(num_events),
376 GET_CNX_ATTR(reset_timeout),
377 GET_CNX_ATTR(last_contact),
379 GET_CNX_ATTR(src_inst),
380 GET_CNX_ATTR(dst_inst),
381 GET_CNX_ATTR(num_pending_acks),
382 GET_CNX_ATTR(num_ack_events),
383 GET_CNX_ATTR(ack_timeout),
387 static struct sysfs_ops veth_cnx_sysfs_ops = {
388 .show = veth_cnx_attribute_show
391 static struct kobj_type veth_lpar_connection_ktype = {
392 .release = veth_release_connection,
393 .sysfs_ops = &veth_cnx_sysfs_ops,
394 .default_attrs = veth_cnx_default_attrs
397 struct veth_port_attribute {
398 struct attribute attr;
399 ssize_t (*show)(struct veth_port *, char *buf);
400 ssize_t (*store)(struct veth_port *, const char *buf);
403 static ssize_t veth_port_attribute_show(struct kobject *kobj,
404 struct attribute *attr, char *buf)
406 struct veth_port_attribute *port_attr;
407 struct veth_port *port;
409 port_attr = container_of(attr, struct veth_port_attribute, attr);
410 port = container_of(kobj, struct veth_port, kobject);
412 if (!port_attr->show)
415 return port_attr->show(port, buf);
418 #define CUSTOM_PORT_ATTR(_name, _format, _expression) \
419 static ssize_t _name##_show(struct veth_port *port, char *buf) \
421 return sprintf(buf, _format, _expression); \
423 struct veth_port_attribute veth_port_attr_##_name = __ATTR_RO(_name)
425 #define SIMPLE_PORT_ATTR(_name) \
426 CUSTOM_PORT_ATTR(_name, "%lu\n", (unsigned long)port->_name)
428 SIMPLE_PORT_ATTR(promiscuous);
429 SIMPLE_PORT_ATTR(num_mcast);
430 CUSTOM_PORT_ATTR(lpar_map, "0x%X\n", port->lpar_map);
431 CUSTOM_PORT_ATTR(stopped_map, "0x%X\n", port->stopped_map);
432 CUSTOM_PORT_ATTR(mac_addr, "0x%llX\n", port->mac_addr);
434 #define GET_PORT_ATTR(_name) (&veth_port_attr_##_name.attr)
435 static struct attribute *veth_port_default_attrs[] = {
436 GET_PORT_ATTR(mac_addr),
437 GET_PORT_ATTR(lpar_map),
438 GET_PORT_ATTR(stopped_map),
439 GET_PORT_ATTR(promiscuous),
440 GET_PORT_ATTR(num_mcast),
444 static struct sysfs_ops veth_port_sysfs_ops = {
445 .show = veth_port_attribute_show
448 static struct kobj_type veth_port_ktype = {
449 .sysfs_ops = &veth_port_sysfs_ops,
450 .default_attrs = veth_port_default_attrs
454 * LPAR connection code
457 static inline void veth_kick_statemachine(struct veth_lpar_connection *cnx)
459 schedule_delayed_work(&cnx->statemachine_wq, 0);
462 static void veth_take_cap(struct veth_lpar_connection *cnx,
463 struct veth_lpevent *event)
467 spin_lock_irqsave(&cnx->lock, flags);
468 /* Receiving caps may mean the other end has just come up, so
469 * we need to reload the instance ID of the far end */
471 HvCallEvent_getTargetLpInstanceId(cnx->remote_lp,
472 HvLpEvent_Type_VirtualLan);
474 if (cnx->state & VETH_STATE_GOTCAPS) {
475 veth_error("Received a second capabilities from LPAR %d.\n",
477 event->base_event.xRc = HvLpEvent_Rc_BufferNotAvailable;
478 HvCallEvent_ackLpEvent((struct HvLpEvent *) event);
480 memcpy(&cnx->cap_event, event, sizeof(cnx->cap_event));
481 cnx->state |= VETH_STATE_GOTCAPS;
482 veth_kick_statemachine(cnx);
484 spin_unlock_irqrestore(&cnx->lock, flags);
487 static void veth_take_cap_ack(struct veth_lpar_connection *cnx,
488 struct veth_lpevent *event)
492 spin_lock_irqsave(&cnx->lock, flags);
493 if (cnx->state & VETH_STATE_GOTCAPACK) {
494 veth_error("Received a second capabilities ack from LPAR %d.\n",
497 memcpy(&cnx->cap_ack_event, event,
498 sizeof(cnx->cap_ack_event));
499 cnx->state |= VETH_STATE_GOTCAPACK;
500 veth_kick_statemachine(cnx);
502 spin_unlock_irqrestore(&cnx->lock, flags);
505 static void veth_take_monitor_ack(struct veth_lpar_connection *cnx,
506 struct veth_lpevent *event)
510 spin_lock_irqsave(&cnx->lock, flags);
511 veth_debug("cnx %d: lost connection.\n", cnx->remote_lp);
513 /* Avoid kicking the statemachine once we're shutdown.
514 * It's unnecessary and it could break veth_stop_connection(). */
516 if (! (cnx->state & VETH_STATE_SHUTDOWN)) {
517 cnx->state |= VETH_STATE_RESET;
518 veth_kick_statemachine(cnx);
520 spin_unlock_irqrestore(&cnx->lock, flags);
523 static void veth_handle_ack(struct veth_lpevent *event)
525 HvLpIndex rlp = event->base_event.xTargetLp;
526 struct veth_lpar_connection *cnx = veth_cnx[rlp];
530 switch (event->base_event.xSubtype) {
532 veth_take_cap_ack(cnx, event);
534 case VETH_EVENT_MONITOR:
535 veth_take_monitor_ack(cnx, event);
538 veth_error("Unknown ack type %d from LPAR %d.\n",
539 event->base_event.xSubtype, rlp);
543 static void veth_handle_int(struct veth_lpevent *event)
545 HvLpIndex rlp = event->base_event.xSourceLp;
546 struct veth_lpar_connection *cnx = veth_cnx[rlp];
552 switch (event->base_event.xSubtype) {
554 veth_take_cap(cnx, event);
556 case VETH_EVENT_MONITOR:
557 /* do nothing... this'll hang out here til we're dead,
558 * and the hypervisor will return it for us. */
560 case VETH_EVENT_FRAMES_ACK:
561 spin_lock_irqsave(&cnx->lock, flags);
563 for (i = 0; i < VETH_MAX_ACKS_PER_MSG; ++i) {
564 u16 msgnum = event->u.frames_ack_data.token[i];
566 if (msgnum < VETH_NUMBUFFERS) {
567 veth_recycle_msg(cnx, cnx->msgs + msgnum);
568 cnx->outstanding_tx--;
574 cnx->last_contact = jiffies;
575 veth_wake_queues(cnx);
578 spin_unlock_irqrestore(&cnx->lock, flags);
580 case VETH_EVENT_FRAMES:
581 veth_receive(cnx, event);
584 veth_error("Unknown interrupt type %d from LPAR %d.\n",
585 event->base_event.xSubtype, rlp);
589 static void veth_handle_event(struct HvLpEvent *event)
591 struct veth_lpevent *veth_event = (struct veth_lpevent *)event;
593 if (hvlpevent_is_ack(event))
594 veth_handle_ack(veth_event);
596 veth_handle_int(veth_event);
599 static int veth_process_caps(struct veth_lpar_connection *cnx)
601 struct veth_cap_data *remote_caps = &cnx->remote_caps;
604 /* Convert timer to jiffies */
605 cnx->ack_timeout = remote_caps->ack_timeout * HZ / 1000000;
607 if ( (remote_caps->num_buffers == 0) ||
608 (remote_caps->ack_threshold > VETH_MAX_ACKS_PER_MSG) ||
609 (remote_caps->ack_threshold == 0) ||
610 (cnx->ack_timeout == 0) ) {
611 veth_error("Received incompatible capabilities from LPAR %d.\n",
613 return HvLpEvent_Rc_InvalidSubtypeData;
616 num_acks_needed = (remote_caps->num_buffers
617 / remote_caps->ack_threshold) + 1;
619 /* FIXME: locking on num_ack_events? */
620 if (cnx->num_ack_events < num_acks_needed) {
623 num = veth_allocate_events(cnx->remote_lp,
624 num_acks_needed-cnx->num_ack_events);
626 cnx->num_ack_events += num;
628 if (cnx->num_ack_events < num_acks_needed) {
629 veth_error("Couldn't allocate enough ack events "
630 "for LPAR %d.\n", cnx->remote_lp);
632 return HvLpEvent_Rc_BufferNotAvailable;
637 return HvLpEvent_Rc_Good;
640 /* FIXME: The gotos here are a bit dubious */
641 static void veth_statemachine(struct work_struct *work)
643 struct veth_lpar_connection *cnx =
644 container_of(work, struct veth_lpar_connection,
645 statemachine_wq.work);
646 int rlp = cnx->remote_lp;
649 spin_lock_irq(&cnx->lock);
652 if (cnx->state & VETH_STATE_RESET) {
653 if (cnx->state & VETH_STATE_OPEN)
654 HvCallEvent_closeLpEventPath(cnx->remote_lp,
655 HvLpEvent_Type_VirtualLan);
658 * Reset ack data. This prevents the ack_timer actually
659 * doing anything, even if it runs one more time when
660 * we drop the lock below.
662 memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks));
663 cnx->num_pending_acks = 0;
665 cnx->state &= ~(VETH_STATE_RESET | VETH_STATE_SENTMON
666 | VETH_STATE_OPEN | VETH_STATE_SENTCAPS
667 | VETH_STATE_GOTCAPACK | VETH_STATE_GOTCAPS
668 | VETH_STATE_SENTCAPACK | VETH_STATE_READY);
670 /* Clean up any leftover messages */
673 for (i = 0; i < VETH_NUMBUFFERS; ++i)
674 veth_recycle_msg(cnx, cnx->msgs + i);
677 cnx->outstanding_tx = 0;
678 veth_wake_queues(cnx);
680 /* Drop the lock so we can do stuff that might sleep or
681 * take other locks. */
682 spin_unlock_irq(&cnx->lock);
684 del_timer_sync(&cnx->ack_timer);
685 del_timer_sync(&cnx->reset_timer);
687 spin_lock_irq(&cnx->lock);
689 if (cnx->state & VETH_STATE_RESET)
692 /* Hack, wait for the other end to reset itself. */
693 if (! (cnx->state & VETH_STATE_SHUTDOWN)) {
694 schedule_delayed_work(&cnx->statemachine_wq, 5 * HZ);
699 if (cnx->state & VETH_STATE_SHUTDOWN)
700 /* It's all over, do nothing */
703 if ( !(cnx->state & VETH_STATE_OPEN) ) {
704 if (! cnx->msgs || (cnx->num_events < (2 + VETH_NUMBUFFERS)) )
707 HvCallEvent_openLpEventPath(rlp, HvLpEvent_Type_VirtualLan);
709 HvCallEvent_getSourceLpInstanceId(rlp,
710 HvLpEvent_Type_VirtualLan);
712 HvCallEvent_getTargetLpInstanceId(rlp,
713 HvLpEvent_Type_VirtualLan);
714 cnx->state |= VETH_STATE_OPEN;
717 if ( (cnx->state & VETH_STATE_OPEN) &&
718 !(cnx->state & VETH_STATE_SENTMON) ) {
719 rc = veth_signalevent(cnx, VETH_EVENT_MONITOR,
720 HvLpEvent_AckInd_DoAck,
721 HvLpEvent_AckType_DeferredAck,
724 if (rc == HvLpEvent_Rc_Good) {
725 cnx->state |= VETH_STATE_SENTMON;
727 if ( (rc != HvLpEvent_Rc_PartitionDead) &&
728 (rc != HvLpEvent_Rc_PathClosed) )
729 veth_error("Error sending monitor to LPAR %d, "
730 "rc = %d\n", rlp, rc);
732 /* Oh well, hope we get a cap from the other
733 * end and do better when that kicks us */
738 if ( (cnx->state & VETH_STATE_OPEN) &&
739 !(cnx->state & VETH_STATE_SENTCAPS)) {
740 u64 *rawcap = (u64 *)&cnx->local_caps;
742 rc = veth_signalevent(cnx, VETH_EVENT_CAP,
743 HvLpEvent_AckInd_DoAck,
744 HvLpEvent_AckType_ImmediateAck,
745 0, rawcap[0], rawcap[1], rawcap[2],
746 rawcap[3], rawcap[4]);
748 if (rc == HvLpEvent_Rc_Good) {
749 cnx->state |= VETH_STATE_SENTCAPS;
751 if ( (rc != HvLpEvent_Rc_PartitionDead) &&
752 (rc != HvLpEvent_Rc_PathClosed) )
753 veth_error("Error sending caps to LPAR %d, "
754 "rc = %d\n", rlp, rc);
756 /* Oh well, hope we get a cap from the other
757 * end and do better when that kicks us */
762 if ((cnx->state & VETH_STATE_GOTCAPS) &&
763 !(cnx->state & VETH_STATE_SENTCAPACK)) {
764 struct veth_cap_data *remote_caps = &cnx->remote_caps;
766 memcpy(remote_caps, &cnx->cap_event.u.caps_data,
767 sizeof(*remote_caps));
769 spin_unlock_irq(&cnx->lock);
770 rc = veth_process_caps(cnx);
771 spin_lock_irq(&cnx->lock);
773 /* We dropped the lock, so recheck for anything which
774 * might mess us up */
775 if (cnx->state & (VETH_STATE_RESET|VETH_STATE_SHUTDOWN))
778 cnx->cap_event.base_event.xRc = rc;
779 HvCallEvent_ackLpEvent((struct HvLpEvent *)&cnx->cap_event);
780 if (rc == HvLpEvent_Rc_Good)
781 cnx->state |= VETH_STATE_SENTCAPACK;
786 if ((cnx->state & VETH_STATE_GOTCAPACK) &&
787 (cnx->state & VETH_STATE_GOTCAPS) &&
788 !(cnx->state & VETH_STATE_READY)) {
789 if (cnx->cap_ack_event.base_event.xRc == HvLpEvent_Rc_Good) {
790 /* Start the ACK timer */
791 cnx->ack_timer.expires = jiffies + cnx->ack_timeout;
792 add_timer(&cnx->ack_timer);
793 cnx->state |= VETH_STATE_READY;
795 veth_error("Caps rejected by LPAR %d, rc = %d\n",
796 rlp, cnx->cap_ack_event.base_event.xRc);
802 spin_unlock_irq(&cnx->lock);
806 /* FIXME: we get here if something happens we really can't
807 * cope with. The link will never work once we get here, and
808 * all we can do is not lock the rest of the system up */
809 veth_error("Unrecoverable error on connection to LPAR %d, shutting down"
810 " (state = 0x%04lx)\n", rlp, cnx->state);
811 cnx->state |= VETH_STATE_SHUTDOWN;
812 spin_unlock_irq(&cnx->lock);
815 static int veth_init_connection(u8 rlp)
817 struct veth_lpar_connection *cnx;
818 struct veth_msg *msgs;
821 if ( (rlp == this_lp) ||
822 ! HvLpConfig_doLpsCommunicateOnVirtualLan(this_lp, rlp) )
825 cnx = kzalloc(sizeof(*cnx), GFP_KERNEL);
829 cnx->remote_lp = rlp;
830 spin_lock_init(&cnx->lock);
831 INIT_DELAYED_WORK(&cnx->statemachine_wq, veth_statemachine);
833 init_timer(&cnx->ack_timer);
834 cnx->ack_timer.function = veth_timed_ack;
835 cnx->ack_timer.data = (unsigned long) cnx;
837 init_timer(&cnx->reset_timer);
838 cnx->reset_timer.function = veth_timed_reset;
839 cnx->reset_timer.data = (unsigned long) cnx;
840 cnx->reset_timeout = 5 * HZ * (VETH_ACKTIMEOUT / 1000000);
842 memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks));
846 /* This gets us 1 reference, which is held on behalf of the driver
847 * infrastructure. It's released at module unload. */
848 kobject_init(&cnx->kobject, &veth_lpar_connection_ktype);
850 msgs = kcalloc(VETH_NUMBUFFERS, sizeof(struct veth_msg), GFP_KERNEL);
852 veth_error("Can't allocate buffers for LPAR %d.\n", rlp);
858 for (i = 0; i < VETH_NUMBUFFERS; i++) {
860 veth_stack_push(cnx, msgs + i);
863 cnx->num_events = veth_allocate_events(rlp, 2 + VETH_NUMBUFFERS);
865 if (cnx->num_events < (2 + VETH_NUMBUFFERS)) {
866 veth_error("Can't allocate enough events for LPAR %d.\n", rlp);
870 cnx->local_caps.num_buffers = VETH_NUMBUFFERS;
871 cnx->local_caps.ack_threshold = ACK_THRESHOLD;
872 cnx->local_caps.ack_timeout = VETH_ACKTIMEOUT;
877 static void veth_stop_connection(struct veth_lpar_connection *cnx)
882 spin_lock_irq(&cnx->lock);
883 cnx->state |= VETH_STATE_RESET | VETH_STATE_SHUTDOWN;
884 veth_kick_statemachine(cnx);
885 spin_unlock_irq(&cnx->lock);
887 /* There's a slim chance the reset code has just queued the
888 * statemachine to run in five seconds. If so we need to cancel
889 * that and requeue the work to run now. */
890 if (cancel_delayed_work(&cnx->statemachine_wq)) {
891 spin_lock_irq(&cnx->lock);
892 veth_kick_statemachine(cnx);
893 spin_unlock_irq(&cnx->lock);
896 /* Wait for the state machine to run. */
897 flush_scheduled_work();
900 static void veth_destroy_connection(struct veth_lpar_connection *cnx)
905 if (cnx->num_events > 0)
906 mf_deallocate_lp_events(cnx->remote_lp,
907 HvLpEvent_Type_VirtualLan,
910 if (cnx->num_ack_events > 0)
911 mf_deallocate_lp_events(cnx->remote_lp,
912 HvLpEvent_Type_VirtualLan,
917 veth_cnx[cnx->remote_lp] = NULL;
921 static void veth_release_connection(struct kobject *kobj)
923 struct veth_lpar_connection *cnx;
924 cnx = container_of(kobj, struct veth_lpar_connection, kobject);
925 veth_stop_connection(cnx);
926 veth_destroy_connection(cnx);
933 static int veth_open(struct net_device *dev)
935 netif_start_queue(dev);
939 static int veth_close(struct net_device *dev)
941 netif_stop_queue(dev);
945 static int veth_change_mtu(struct net_device *dev, int new_mtu)
947 if ((new_mtu < 68) || (new_mtu > VETH_MAX_MTU))
953 static void veth_set_multicast_list(struct net_device *dev)
955 struct veth_port *port = netdev_priv(dev);
958 write_lock_irqsave(&port->mcast_gate, flags);
960 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) ||
961 (dev->mc_count > VETH_MAX_MCAST)) {
962 port->promiscuous = 1;
964 struct dev_mc_list *dmi = dev->mc_list;
967 port->promiscuous = 0;
972 for (i = 0; i < dev->mc_count; i++) {
973 u8 *addr = dmi->dmi_addr;
976 if (addr[0] & 0x01) {/* multicast address? */
977 memcpy(&xaddr, addr, ETH_ALEN);
978 port->mcast_addr[port->num_mcast] = xaddr;
985 write_unlock_irqrestore(&port->mcast_gate, flags);
988 static void veth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
990 strncpy(info->driver, DRV_NAME, sizeof(info->driver) - 1);
991 info->driver[sizeof(info->driver) - 1] = '\0';
992 strncpy(info->version, DRV_VERSION, sizeof(info->version) - 1);
993 info->version[sizeof(info->version) - 1] = '\0';
996 static int veth_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
998 ecmd->supported = (SUPPORTED_1000baseT_Full
999 | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
1000 ecmd->advertising = (SUPPORTED_1000baseT_Full
1001 | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
1002 ecmd->port = PORT_FIBRE;
1003 ecmd->transceiver = XCVR_INTERNAL;
1004 ecmd->phy_address = 0;
1005 ecmd->speed = SPEED_1000;
1006 ecmd->duplex = DUPLEX_FULL;
1007 ecmd->autoneg = AUTONEG_ENABLE;
1008 ecmd->maxtxpkt = 120;
1009 ecmd->maxrxpkt = 120;
1013 static u32 veth_get_link(struct net_device *dev)
1018 static const struct ethtool_ops ops = {
1019 .get_drvinfo = veth_get_drvinfo,
1020 .get_settings = veth_get_settings,
1021 .get_link = veth_get_link,
1024 static const struct net_device_ops veth_netdev_ops = {
1025 .ndo_open = veth_open,
1026 .ndo_stop = veth_close,
1027 .ndo_start_xmit = veth_start_xmit,
1028 .ndo_change_mtu = veth_change_mtu,
1029 .ndo_set_multicast_list = veth_set_multicast_list,
1030 .ndo_set_mac_address = NULL,
1031 .ndo_validate_addr = eth_validate_addr,
1034 static struct net_device *veth_probe_one(int vlan,
1035 struct vio_dev *vio_dev)
1037 struct net_device *dev;
1038 struct veth_port *port;
1039 struct device *vdev = &vio_dev->dev;
1041 const unsigned char *mac_addr;
1043 mac_addr = vio_get_attribute(vio_dev, "local-mac-address", NULL);
1044 if (mac_addr == NULL)
1045 mac_addr = vio_get_attribute(vio_dev, "mac-address", NULL);
1046 if (mac_addr == NULL) {
1047 veth_error("Unable to fetch MAC address from device tree.\n");
1051 dev = alloc_etherdev(sizeof (struct veth_port));
1053 veth_error("Unable to allocate net_device structure!\n");
1057 port = netdev_priv(dev);
1059 spin_lock_init(&port->queue_lock);
1060 rwlock_init(&port->mcast_gate);
1061 port->stopped_map = 0;
1063 for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
1064 HvLpVirtualLanIndexMap map;
1068 map = HvLpConfig_getVirtualLanIndexMapForLp(i);
1069 if (map & (0x8000 >> vlan))
1070 port->lpar_map |= (1 << i);
1074 memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
1076 dev->mtu = VETH_MAX_MTU;
1078 memcpy(&port->mac_addr, mac_addr, ETH_ALEN);
1080 dev->netdev_ops = &veth_netdev_ops;
1081 SET_ETHTOOL_OPS(dev, &ops);
1083 SET_NETDEV_DEV(dev, vdev);
1085 rc = register_netdev(dev);
1087 veth_error("Failed registering net device for vlan%d.\n", vlan);
1092 kobject_init(&port->kobject, &veth_port_ktype);
1093 if (0 != kobject_add(&port->kobject, &dev->dev.kobj, "veth_port"))
1094 veth_error("Failed adding port for %s to sysfs.\n", dev->name);
1096 veth_info("%s attached to iSeries vlan %d (LPAR map = 0x%.4X)\n",
1097 dev->name, vlan, port->lpar_map);
1106 static int veth_transmit_to_one(struct sk_buff *skb, HvLpIndex rlp,
1107 struct net_device *dev)
1109 struct veth_lpar_connection *cnx = veth_cnx[rlp];
1110 struct veth_port *port = netdev_priv(dev);
1112 struct veth_msg *msg = NULL;
1113 unsigned long flags;
1118 spin_lock_irqsave(&cnx->lock, flags);
1120 if (! (cnx->state & VETH_STATE_READY))
1123 if ((skb->len - ETH_HLEN) > VETH_MAX_MTU)
1126 msg = veth_stack_pop(cnx);
1131 msg->skb = skb_get(skb);
1133 msg->data.addr[0] = dma_map_single(port->dev, skb->data,
1134 skb->len, DMA_TO_DEVICE);
1136 if (dma_mapping_error(port->dev, msg->data.addr[0]))
1137 goto recycle_and_drop;
1139 msg->dev = port->dev;
1140 msg->data.len[0] = skb->len;
1141 msg->data.eofmask = 1 << VETH_EOF_SHIFT;
1143 rc = veth_signaldata(cnx, VETH_EVENT_FRAMES, msg->token, &msg->data);
1145 if (rc != HvLpEvent_Rc_Good)
1146 goto recycle_and_drop;
1148 /* If the timer's not already running, start it now. */
1149 if (0 == cnx->outstanding_tx)
1150 mod_timer(&cnx->reset_timer, jiffies + cnx->reset_timeout);
1152 cnx->last_contact = jiffies;
1153 cnx->outstanding_tx++;
1155 if (veth_stack_is_empty(cnx))
1156 veth_stop_queues(cnx);
1159 spin_unlock_irqrestore(&cnx->lock, flags);
1163 veth_recycle_msg(cnx, msg);
1165 spin_unlock_irqrestore(&cnx->lock, flags);
1169 static void veth_transmit_to_many(struct sk_buff *skb,
1170 HvLpIndexMap lpmask,
1171 struct net_device *dev)
1173 int i, success, error;
1175 success = error = 0;
1177 for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
1178 if ((lpmask & (1 << i)) == 0)
1181 if (veth_transmit_to_one(skb, i, dev))
1188 dev->stats.tx_errors++;
1191 dev->stats.tx_packets++;
1192 dev->stats.tx_bytes += skb->len;
1196 static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev)
1198 unsigned char *frame = skb->data;
1199 struct veth_port *port = netdev_priv(dev);
1200 HvLpIndexMap lpmask;
1202 if (! (frame[0] & 0x01)) {
1203 /* unicast packet */
1204 HvLpIndex rlp = frame[5];
1206 if ( ! ((1 << rlp) & port->lpar_map) ) {
1208 return NETDEV_TX_OK;
1213 lpmask = port->lpar_map;
1216 veth_transmit_to_many(skb, lpmask, dev);
1220 return NETDEV_TX_OK;
1223 /* You must hold the connection's lock when you call this function. */
1224 static void veth_recycle_msg(struct veth_lpar_connection *cnx,
1225 struct veth_msg *msg)
1227 u32 dma_address, dma_length;
1231 dma_address = msg->data.addr[0];
1232 dma_length = msg->data.len[0];
1234 if (!dma_mapping_error(msg->dev, dma_address))
1235 dma_unmap_single(msg->dev, dma_address, dma_length,
1239 dev_kfree_skb_any(msg->skb);
1243 memset(&msg->data, 0, sizeof(msg->data));
1244 veth_stack_push(cnx, msg);
1245 } else if (cnx->state & VETH_STATE_OPEN) {
1246 veth_error("Non-pending frame (# %d) acked by LPAR %d.\n",
1247 cnx->remote_lp, msg->token);
1251 static void veth_wake_queues(struct veth_lpar_connection *cnx)
1255 for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
1256 struct net_device *dev = veth_dev[i];
1257 struct veth_port *port;
1258 unsigned long flags;
1263 port = netdev_priv(dev);
1265 if (! (port->lpar_map & (1<<cnx->remote_lp)))
1268 spin_lock_irqsave(&port->queue_lock, flags);
1270 port->stopped_map &= ~(1 << cnx->remote_lp);
1272 if (0 == port->stopped_map && netif_queue_stopped(dev)) {
1273 veth_debug("cnx %d: woke queue for %s.\n",
1274 cnx->remote_lp, dev->name);
1275 netif_wake_queue(dev);
1277 spin_unlock_irqrestore(&port->queue_lock, flags);
1281 static void veth_stop_queues(struct veth_lpar_connection *cnx)
1285 for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
1286 struct net_device *dev = veth_dev[i];
1287 struct veth_port *port;
1292 port = netdev_priv(dev);
1294 /* If this cnx is not on the vlan for this port, continue */
1295 if (! (port->lpar_map & (1 << cnx->remote_lp)))
1298 spin_lock(&port->queue_lock);
1300 netif_stop_queue(dev);
1301 port->stopped_map |= (1 << cnx->remote_lp);
1303 veth_debug("cnx %d: stopped queue for %s, map = 0x%x.\n",
1304 cnx->remote_lp, dev->name, port->stopped_map);
1306 spin_unlock(&port->queue_lock);
1310 static void veth_timed_reset(unsigned long ptr)
1312 struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)ptr;
1313 unsigned long trigger_time, flags;
1315 /* FIXME is it possible this fires after veth_stop_connection()?
1316 * That would reschedule the statemachine for 5 seconds and probably
1317 * execute it after the module's been unloaded. Hmm. */
1319 spin_lock_irqsave(&cnx->lock, flags);
1321 if (cnx->outstanding_tx > 0) {
1322 trigger_time = cnx->last_contact + cnx->reset_timeout;
1324 if (trigger_time < jiffies) {
1325 cnx->state |= VETH_STATE_RESET;
1326 veth_kick_statemachine(cnx);
1327 veth_error("%d packets not acked by LPAR %d within %d "
1328 "seconds, resetting.\n",
1329 cnx->outstanding_tx, cnx->remote_lp,
1330 cnx->reset_timeout / HZ);
1332 /* Reschedule the timer */
1333 trigger_time = jiffies + cnx->reset_timeout;
1334 mod_timer(&cnx->reset_timer, trigger_time);
1338 spin_unlock_irqrestore(&cnx->lock, flags);
1345 static inline int veth_frame_wanted(struct veth_port *port, u64 mac_addr)
1349 unsigned long flags;
1351 if ( (mac_addr == port->mac_addr) || (mac_addr == 0xffffffffffff0000) )
1354 read_lock_irqsave(&port->mcast_gate, flags);
1356 if (port->promiscuous) {
1361 for (i = 0; i < port->num_mcast; ++i) {
1362 if (port->mcast_addr[i] == mac_addr) {
1369 read_unlock_irqrestore(&port->mcast_gate, flags);
1379 #define VETH_MAX_PAGES_PER_FRAME ( (VETH_MAX_MTU+PAGE_SIZE-2)/PAGE_SIZE + 1 )
1381 static inline void veth_build_dma_list(struct dma_chunk *list,
1382 unsigned char *p, unsigned long length)
1387 /* FIXME: skbs are contiguous in real addresses. Do we
1388 * really need to break it into PAGE_SIZE chunks, or can we do
1389 * it just at the granularity of iSeries real->absolute
1390 * mapping? Indeed, given the way the allocator works, can we
1391 * count on them being absolutely contiguous? */
1392 list[0].addr = iseries_hv_addr(p);
1393 list[0].size = min(length,
1394 PAGE_SIZE - ((unsigned long)p & ~PAGE_MASK));
1396 done = list[0].size;
1397 while (done < length) {
1398 list[i].addr = iseries_hv_addr(p + done);
1399 list[i].size = min(length-done, PAGE_SIZE);
1400 done += list[i].size;
1405 static void veth_flush_acks(struct veth_lpar_connection *cnx)
1409 rc = veth_signaldata(cnx, VETH_EVENT_FRAMES_ACK,
1410 0, &cnx->pending_acks);
1412 if (rc != HvLpEvent_Rc_Good)
1413 veth_error("Failed acking frames from LPAR %d, rc = %d\n",
1414 cnx->remote_lp, (int)rc);
1416 cnx->num_pending_acks = 0;
1417 memset(&cnx->pending_acks, 0xff, sizeof(cnx->pending_acks));
1420 static void veth_receive(struct veth_lpar_connection *cnx,
1421 struct veth_lpevent *event)
1423 struct veth_frames_data *senddata = &event->u.frames_data;
1426 unsigned long flags;
1431 struct sk_buff *skb;
1432 struct dma_chunk local_list[VETH_MAX_PAGES_PER_FRAME];
1433 struct dma_chunk remote_list[VETH_MAX_FRAMES_PER_MSG];
1435 HvLpVirtualLanIndex vlan;
1436 struct net_device *dev;
1437 struct veth_port *port;
1439 /* FIXME: do we need this? */
1440 memset(local_list, 0, sizeof(local_list));
1441 memset(remote_list, 0, sizeof(VETH_MAX_FRAMES_PER_MSG));
1443 /* a 0 address marks the end of the valid entries */
1444 if (senddata->addr[startchunk] == 0)
1447 /* make sure that we have at least 1 EOF entry in the
1448 * remaining entries */
1449 if (! (senddata->eofmask >> (startchunk + VETH_EOF_SHIFT))) {
1450 veth_error("Missing EOF fragment in event "
1451 "eofmask = 0x%x startchunk = %d\n",
1452 (unsigned)senddata->eofmask,
1457 /* build list of chunks in this frame */
1460 remote_list[nchunks].addr =
1461 (u64) senddata->addr[startchunk+nchunks] << 32;
1462 remote_list[nchunks].size =
1463 senddata->len[startchunk+nchunks];
1464 length += remote_list[nchunks].size;
1465 } while (! (senddata->eofmask &
1466 (1 << (VETH_EOF_SHIFT + startchunk + nchunks++))));
1468 /* length == total length of all chunks */
1469 /* nchunks == # of chunks in this frame */
1471 if ((length - ETH_HLEN) > VETH_MAX_MTU) {
1472 veth_error("Received oversize frame from LPAR %d "
1474 cnx->remote_lp, length);
1478 skb = alloc_skb(length, GFP_ATOMIC);
1482 veth_build_dma_list(local_list, skb->data, length);
1484 rc = HvCallEvent_dmaBufList(HvLpEvent_Type_VirtualLan,
1485 event->base_event.xSourceLp,
1486 HvLpDma_Direction_RemoteToLocal,
1489 HvLpDma_AddressType_RealAddress,
1490 HvLpDma_AddressType_TceIndex,
1491 iseries_hv_addr(&local_list),
1492 iseries_hv_addr(&remote_list),
1494 if (rc != HvLpDma_Rc_Good) {
1495 dev_kfree_skb_irq(skb);
1499 vlan = skb->data[9];
1500 dev = veth_dev[vlan];
1503 * Some earlier versions of the driver sent
1504 * broadcasts down all connections, even to lpars
1505 * that weren't on the relevant vlan. So ignore
1506 * packets belonging to a vlan we're not on.
1507 * We can also be here if we receive packets while
1508 * the driver is going down, because then dev is NULL.
1510 dev_kfree_skb_irq(skb);
1514 port = netdev_priv(dev);
1515 dest = *((u64 *) skb->data) & 0xFFFFFFFFFFFF0000;
1517 if ((vlan > HVMAXARCHITECTEDVIRTUALLANS) || !port) {
1518 dev_kfree_skb_irq(skb);
1521 if (! veth_frame_wanted(port, dest)) {
1522 dev_kfree_skb_irq(skb);
1526 skb_put(skb, length);
1527 skb->protocol = eth_type_trans(skb, dev);
1528 skb->ip_summed = CHECKSUM_NONE;
1529 netif_rx(skb); /* send it up */
1530 dev->stats.rx_packets++;
1531 dev->stats.rx_bytes += length;
1532 } while (startchunk += nchunks, startchunk < VETH_MAX_FRAMES_PER_MSG);
1535 spin_lock_irqsave(&cnx->lock, flags);
1536 BUG_ON(cnx->num_pending_acks > VETH_MAX_ACKS_PER_MSG);
1538 cnx->pending_acks[cnx->num_pending_acks++] =
1539 event->base_event.xCorrelationToken;
1541 if ( (cnx->num_pending_acks >= cnx->remote_caps.ack_threshold) ||
1542 (cnx->num_pending_acks >= VETH_MAX_ACKS_PER_MSG) )
1543 veth_flush_acks(cnx);
1545 spin_unlock_irqrestore(&cnx->lock, flags);
1548 static void veth_timed_ack(unsigned long ptr)
1550 struct veth_lpar_connection *cnx = (struct veth_lpar_connection *) ptr;
1551 unsigned long flags;
1553 /* Ack all the events */
1554 spin_lock_irqsave(&cnx->lock, flags);
1555 if (cnx->num_pending_acks > 0)
1556 veth_flush_acks(cnx);
1558 /* Reschedule the timer */
1559 cnx->ack_timer.expires = jiffies + cnx->ack_timeout;
1560 add_timer(&cnx->ack_timer);
1561 spin_unlock_irqrestore(&cnx->lock, flags);
1564 static int veth_remove(struct vio_dev *vdev)
1566 struct veth_lpar_connection *cnx;
1567 struct net_device *dev;
1568 struct veth_port *port;
1571 dev = veth_dev[vdev->unit_address];
1576 port = netdev_priv(dev);
1578 for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
1581 if (cnx && (port->lpar_map & (1 << i))) {
1582 /* Drop our reference to connections on our VLAN */
1583 kobject_put(&cnx->kobject);
1587 veth_dev[vdev->unit_address] = NULL;
1588 kobject_del(&port->kobject);
1589 kobject_put(&port->kobject);
1590 unregister_netdev(dev);
1596 static int veth_probe(struct vio_dev *vdev, const struct vio_device_id *id)
1598 int i = vdev->unit_address;
1599 struct net_device *dev;
1600 struct veth_port *port;
1602 dev = veth_probe_one(i, vdev);
1609 port = (struct veth_port*)netdev_priv(dev);
1611 /* Start the state machine on each connection on this vlan. If we're
1612 * the first dev to do so this will commence link negotiation */
1613 for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
1614 struct veth_lpar_connection *cnx;
1616 if (! (port->lpar_map & (1 << i)))
1623 kobject_get(&cnx->kobject);
1624 veth_kick_statemachine(cnx);
1631 * veth_device_table: Used by vio.c to match devices that we
1634 static struct vio_device_id veth_device_table[] __devinitdata = {
1635 { "network", "IBM,iSeries-l-lan" },
1638 MODULE_DEVICE_TABLE(vio, veth_device_table);
1640 static struct vio_driver veth_driver = {
1641 .id_table = veth_device_table,
1642 .probe = veth_probe,
1643 .remove = veth_remove,
1646 .owner = THIS_MODULE,
1651 * Module initialization/cleanup
1654 static void __exit veth_module_cleanup(void)
1657 struct veth_lpar_connection *cnx;
1659 /* Disconnect our "irq" to stop events coming from the Hypervisor. */
1660 HvLpEvent_unregisterHandler(HvLpEvent_Type_VirtualLan);
1662 /* Make sure any work queued from Hypervisor callbacks is finished. */
1663 flush_scheduled_work();
1665 for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
1671 /* Remove the connection from sysfs */
1672 kobject_del(&cnx->kobject);
1673 /* Drop the driver's reference to the connection */
1674 kobject_put(&cnx->kobject);
1677 /* Unregister the driver, which will close all the netdevs and stop
1678 * the connections when they're no longer referenced. */
1679 vio_unregister_driver(&veth_driver);
1681 module_exit(veth_module_cleanup);
1683 static int __init veth_module_init(void)
1688 if (!firmware_has_feature(FW_FEATURE_ISERIES))
1691 this_lp = HvLpConfig_getLpIndex_outline();
1693 for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
1694 rc = veth_init_connection(i);
1699 HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan,
1700 &veth_handle_event);
1702 rc = vio_register_driver(&veth_driver);
1706 for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
1707 struct kobject *kobj;
1712 kobj = &veth_cnx[i]->kobject;
1713 /* If the add failes, complain but otherwise continue */
1714 if (0 != driver_add_kobj(&veth_driver.driver, kobj,
1715 "cnx%.2d", veth_cnx[i]->remote_lp))
1716 veth_error("cnx %d: Failed adding to sysfs.\n", i);
1722 for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
1723 veth_destroy_connection(veth_cnx[i]);
1728 module_init(veth_module_init);