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/config.h>
60 #include <linux/module.h>
61 #include <linux/types.h>
62 #include <linux/errno.h>
63 #include <linux/ioport.h>
64 #include <linux/kernel.h>
65 #include <linux/netdevice.h>
66 #include <linux/etherdevice.h>
67 #include <linux/skbuff.h>
68 #include <linux/init.h>
69 #include <linux/delay.h>
71 #include <linux/ethtool.h>
72 #include <linux/if_ether.h>
74 #include <asm/abs_addr.h>
75 #include <asm/iseries/mf.h>
76 #include <asm/uaccess.h>
78 #include <asm/iseries/hv_lp_config.h>
79 #include <asm/iseries/hv_types.h>
80 #include <asm/iseries/hv_lp_event.h>
81 #include <asm/iommu.h>
86 MODULE_AUTHOR("Kyle Lucke <klucke@us.ibm.com>");
87 MODULE_DESCRIPTION("iSeries Virtual ethernet driver");
88 MODULE_LICENSE("GPL");
90 #define VETH_EVENT_CAP (0)
91 #define VETH_EVENT_FRAMES (1)
92 #define VETH_EVENT_MONITOR (2)
93 #define VETH_EVENT_FRAMES_ACK (3)
95 #define VETH_MAX_ACKS_PER_MSG (20)
96 #define VETH_MAX_FRAMES_PER_MSG (6)
98 struct veth_frames_data
{
99 u32 addr
[VETH_MAX_FRAMES_PER_MSG
];
100 u16 len
[VETH_MAX_FRAMES_PER_MSG
];
103 #define VETH_EOF_SHIFT (32-VETH_MAX_FRAMES_PER_MSG)
105 struct veth_frames_ack_data
{
106 u16 token
[VETH_MAX_ACKS_PER_MSG
];
109 struct veth_cap_data
{
120 struct veth_lpevent
{
121 struct HvLpEvent base_event
;
123 struct veth_cap_data caps_data
;
124 struct veth_frames_data frames_data
;
125 struct veth_frames_ack_data frames_ack_data
;
130 #define DRV_NAME "iseries_veth"
131 #define DRV_VERSION "2.0"
133 #define VETH_NUMBUFFERS (120)
134 #define VETH_ACKTIMEOUT (1000000) /* microseconds */
135 #define VETH_MAX_MCAST (12)
137 #define VETH_MAX_MTU (9000)
139 #if VETH_NUMBUFFERS < 10
140 #define ACK_THRESHOLD (1)
141 #elif VETH_NUMBUFFERS < 20
142 #define ACK_THRESHOLD (4)
143 #elif VETH_NUMBUFFERS < 40
144 #define ACK_THRESHOLD (10)
146 #define ACK_THRESHOLD (20)
149 #define VETH_STATE_SHUTDOWN (0x0001)
150 #define VETH_STATE_OPEN (0x0002)
151 #define VETH_STATE_RESET (0x0004)
152 #define VETH_STATE_SENTMON (0x0008)
153 #define VETH_STATE_SENTCAPS (0x0010)
154 #define VETH_STATE_GOTCAPACK (0x0020)
155 #define VETH_STATE_GOTCAPS (0x0040)
156 #define VETH_STATE_SENTCAPACK (0x0080)
157 #define VETH_STATE_READY (0x0100)
160 struct veth_msg
*next
;
161 struct veth_frames_data data
;
168 struct veth_lpar_connection
{
170 struct work_struct statemachine_wq
;
171 struct veth_msg
*msgs
;
173 struct veth_cap_data local_caps
;
175 struct kobject kobject
;
176 struct timer_list ack_timer
;
178 struct timer_list reset_timer
;
179 unsigned int reset_timeout
;
180 unsigned long last_contact
;
185 HvLpInstanceId src_inst
;
186 HvLpInstanceId dst_inst
;
187 struct veth_lpevent cap_event
, cap_ack_event
;
188 u16 pending_acks
[VETH_MAX_ACKS_PER_MSG
];
189 u32 num_pending_acks
;
192 struct veth_cap_data remote_caps
;
195 struct veth_msg
*msg_stack_head
;
200 struct net_device_stats stats
;
202 HvLpIndexMap lpar_map
;
204 /* queue_lock protects the stopped_map and dev's queue. */
205 spinlock_t queue_lock
;
206 HvLpIndexMap stopped_map
;
208 /* mcast_gate protects promiscuous, num_mcast & mcast_addr. */
212 u64 mcast_addr
[VETH_MAX_MCAST
];
214 struct kobject kobject
;
217 static HvLpIndex this_lp
;
218 static struct veth_lpar_connection
*veth_cnx
[HVMAXARCHITECTEDLPS
]; /* = 0 */
219 static struct net_device
*veth_dev
[HVMAXARCHITECTEDVIRTUALLANS
]; /* = 0 */
221 static int veth_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
222 static void veth_recycle_msg(struct veth_lpar_connection
*, struct veth_msg
*);
223 static void veth_wake_queues(struct veth_lpar_connection
*cnx
);
224 static void veth_stop_queues(struct veth_lpar_connection
*cnx
);
225 static void veth_receive(struct veth_lpar_connection
*, struct veth_lpevent
*);
226 static void veth_release_connection(struct kobject
*kobject
);
227 static void veth_timed_ack(unsigned long ptr
);
228 static void veth_timed_reset(unsigned long ptr
);
234 #define veth_info(fmt, args...) \
235 printk(KERN_INFO DRV_NAME ": " fmt, ## args)
237 #define veth_error(fmt, args...) \
238 printk(KERN_ERR DRV_NAME ": Error: " fmt, ## args)
241 #define veth_debug(fmt, args...) \
242 printk(KERN_DEBUG DRV_NAME ": " fmt, ## args)
244 #define veth_debug(fmt, args...) do {} while (0)
247 /* You must hold the connection's lock when you call this function. */
248 static inline void veth_stack_push(struct veth_lpar_connection
*cnx
,
249 struct veth_msg
*msg
)
251 msg
->next
= cnx
->msg_stack_head
;
252 cnx
->msg_stack_head
= msg
;
255 /* You must hold the connection's lock when you call this function. */
256 static inline struct veth_msg
*veth_stack_pop(struct veth_lpar_connection
*cnx
)
258 struct veth_msg
*msg
;
260 msg
= cnx
->msg_stack_head
;
262 cnx
->msg_stack_head
= cnx
->msg_stack_head
->next
;
267 /* You must hold the connection's lock when you call this function. */
268 static inline int veth_stack_is_empty(struct veth_lpar_connection
*cnx
)
270 return cnx
->msg_stack_head
== NULL
;
273 static inline HvLpEvent_Rc
274 veth_signalevent(struct veth_lpar_connection
*cnx
, u16 subtype
,
275 HvLpEvent_AckInd ackind
, HvLpEvent_AckType acktype
,
277 u64 data1
, u64 data2
, u64 data3
, u64 data4
, u64 data5
)
279 return HvCallEvent_signalLpEventFast(cnx
->remote_lp
,
280 HvLpEvent_Type_VirtualLan
,
281 subtype
, ackind
, acktype
,
284 token
, data1
, data2
, data3
,
288 static inline HvLpEvent_Rc
veth_signaldata(struct veth_lpar_connection
*cnx
,
289 u16 subtype
, u64 token
, void *data
)
291 u64
*p
= (u64
*) data
;
293 return veth_signalevent(cnx
, subtype
, HvLpEvent_AckInd_NoAck
,
294 HvLpEvent_AckType_ImmediateAck
,
295 token
, p
[0], p
[1], p
[2], p
[3], p
[4]);
298 struct veth_allocation
{
303 static void veth_complete_allocation(void *parm
, int number
)
305 struct veth_allocation
*vc
= (struct veth_allocation
*)parm
;
311 static int veth_allocate_events(HvLpIndex rlp
, int number
)
313 struct veth_allocation vc
= { COMPLETION_INITIALIZER(vc
.c
), 0 };
315 mf_allocate_lp_events(rlp
, HvLpEvent_Type_VirtualLan
,
316 sizeof(struct veth_lpevent
), number
,
317 &veth_complete_allocation
, &vc
);
318 wait_for_completion(&vc
.c
);
327 struct veth_cnx_attribute
{
328 struct attribute attr
;
329 ssize_t (*show
)(struct veth_lpar_connection
*, char *buf
);
330 ssize_t (*store
)(struct veth_lpar_connection
*, const char *buf
);
333 static ssize_t
veth_cnx_attribute_show(struct kobject
*kobj
,
334 struct attribute
*attr
, char *buf
)
336 struct veth_cnx_attribute
*cnx_attr
;
337 struct veth_lpar_connection
*cnx
;
339 cnx_attr
= container_of(attr
, struct veth_cnx_attribute
, attr
);
340 cnx
= container_of(kobj
, struct veth_lpar_connection
, kobject
);
345 return cnx_attr
->show(cnx
, buf
);
348 #define CUSTOM_CNX_ATTR(_name, _format, _expression) \
349 static ssize_t _name##_show(struct veth_lpar_connection *cnx, char *buf)\
351 return sprintf(buf, _format, _expression); \
353 struct veth_cnx_attribute veth_cnx_attr_##_name = __ATTR_RO(_name)
355 #define SIMPLE_CNX_ATTR(_name) \
356 CUSTOM_CNX_ATTR(_name, "%lu\n", (unsigned long)cnx->_name)
358 SIMPLE_CNX_ATTR(outstanding_tx
);
359 SIMPLE_CNX_ATTR(remote_lp
);
360 SIMPLE_CNX_ATTR(num_events
);
361 SIMPLE_CNX_ATTR(src_inst
);
362 SIMPLE_CNX_ATTR(dst_inst
);
363 SIMPLE_CNX_ATTR(num_pending_acks
);
364 SIMPLE_CNX_ATTR(num_ack_events
);
365 CUSTOM_CNX_ATTR(ack_timeout
, "%d\n", jiffies_to_msecs(cnx
->ack_timeout
));
366 CUSTOM_CNX_ATTR(reset_timeout
, "%d\n", jiffies_to_msecs(cnx
->reset_timeout
));
367 CUSTOM_CNX_ATTR(state
, "0x%.4lX\n", cnx
->state
);
368 CUSTOM_CNX_ATTR(last_contact
, "%d\n", cnx
->last_contact
?
369 jiffies_to_msecs(jiffies
- cnx
->last_contact
) : 0);
371 #define GET_CNX_ATTR(_name) (&veth_cnx_attr_##_name.attr)
373 static struct attribute
*veth_cnx_default_attrs
[] = {
374 GET_CNX_ATTR(outstanding_tx
),
375 GET_CNX_ATTR(remote_lp
),
376 GET_CNX_ATTR(num_events
),
377 GET_CNX_ATTR(reset_timeout
),
378 GET_CNX_ATTR(last_contact
),
380 GET_CNX_ATTR(src_inst
),
381 GET_CNX_ATTR(dst_inst
),
382 GET_CNX_ATTR(num_pending_acks
),
383 GET_CNX_ATTR(num_ack_events
),
384 GET_CNX_ATTR(ack_timeout
),
388 static struct sysfs_ops veth_cnx_sysfs_ops
= {
389 .show
= veth_cnx_attribute_show
392 static struct kobj_type veth_lpar_connection_ktype
= {
393 .release
= veth_release_connection
,
394 .sysfs_ops
= &veth_cnx_sysfs_ops
,
395 .default_attrs
= veth_cnx_default_attrs
398 struct veth_port_attribute
{
399 struct attribute attr
;
400 ssize_t (*show
)(struct veth_port
*, char *buf
);
401 ssize_t (*store
)(struct veth_port
*, const char *buf
);
404 static ssize_t
veth_port_attribute_show(struct kobject
*kobj
,
405 struct attribute
*attr
, char *buf
)
407 struct veth_port_attribute
*port_attr
;
408 struct veth_port
*port
;
410 port_attr
= container_of(attr
, struct veth_port_attribute
, attr
);
411 port
= container_of(kobj
, struct veth_port
, kobject
);
413 if (!port_attr
->show
)
416 return port_attr
->show(port
, buf
);
419 #define CUSTOM_PORT_ATTR(_name, _format, _expression) \
420 static ssize_t _name##_show(struct veth_port *port, char *buf) \
422 return sprintf(buf, _format, _expression); \
424 struct veth_port_attribute veth_port_attr_##_name = __ATTR_RO(_name)
426 #define SIMPLE_PORT_ATTR(_name) \
427 CUSTOM_PORT_ATTR(_name, "%lu\n", (unsigned long)port->_name)
429 SIMPLE_PORT_ATTR(promiscuous
);
430 SIMPLE_PORT_ATTR(num_mcast
);
431 CUSTOM_PORT_ATTR(lpar_map
, "0x%X\n", port
->lpar_map
);
432 CUSTOM_PORT_ATTR(stopped_map
, "0x%X\n", port
->stopped_map
);
433 CUSTOM_PORT_ATTR(mac_addr
, "0x%lX\n", port
->mac_addr
);
435 #define GET_PORT_ATTR(_name) (&veth_port_attr_##_name.attr)
436 static struct attribute
*veth_port_default_attrs
[] = {
437 GET_PORT_ATTR(mac_addr
),
438 GET_PORT_ATTR(lpar_map
),
439 GET_PORT_ATTR(stopped_map
),
440 GET_PORT_ATTR(promiscuous
),
441 GET_PORT_ATTR(num_mcast
),
445 static struct sysfs_ops veth_port_sysfs_ops
= {
446 .show
= veth_port_attribute_show
449 static struct kobj_type veth_port_ktype
= {
450 .sysfs_ops
= &veth_port_sysfs_ops
,
451 .default_attrs
= veth_port_default_attrs
455 * LPAR connection code
458 static inline void veth_kick_statemachine(struct veth_lpar_connection
*cnx
)
460 schedule_work(&cnx
->statemachine_wq
);
463 static void veth_take_cap(struct veth_lpar_connection
*cnx
,
464 struct veth_lpevent
*event
)
468 spin_lock_irqsave(&cnx
->lock
, flags
);
469 /* Receiving caps may mean the other end has just come up, so
470 * we need to reload the instance ID of the far end */
472 HvCallEvent_getTargetLpInstanceId(cnx
->remote_lp
,
473 HvLpEvent_Type_VirtualLan
);
475 if (cnx
->state
& VETH_STATE_GOTCAPS
) {
476 veth_error("Received a second capabilities from LPAR %d.\n",
478 event
->base_event
.xRc
= HvLpEvent_Rc_BufferNotAvailable
;
479 HvCallEvent_ackLpEvent((struct HvLpEvent
*) event
);
481 memcpy(&cnx
->cap_event
, event
, sizeof(cnx
->cap_event
));
482 cnx
->state
|= VETH_STATE_GOTCAPS
;
483 veth_kick_statemachine(cnx
);
485 spin_unlock_irqrestore(&cnx
->lock
, flags
);
488 static void veth_take_cap_ack(struct veth_lpar_connection
*cnx
,
489 struct veth_lpevent
*event
)
493 spin_lock_irqsave(&cnx
->lock
, flags
);
494 if (cnx
->state
& VETH_STATE_GOTCAPACK
) {
495 veth_error("Received a second capabilities ack from LPAR %d.\n",
498 memcpy(&cnx
->cap_ack_event
, event
,
499 sizeof(&cnx
->cap_ack_event
));
500 cnx
->state
|= VETH_STATE_GOTCAPACK
;
501 veth_kick_statemachine(cnx
);
503 spin_unlock_irqrestore(&cnx
->lock
, flags
);
506 static void veth_take_monitor_ack(struct veth_lpar_connection
*cnx
,
507 struct veth_lpevent
*event
)
511 spin_lock_irqsave(&cnx
->lock
, flags
);
512 veth_debug("cnx %d: lost connection.\n", cnx
->remote_lp
);
514 /* Avoid kicking the statemachine once we're shutdown.
515 * It's unnecessary and it could break veth_stop_connection(). */
517 if (! (cnx
->state
& VETH_STATE_SHUTDOWN
)) {
518 cnx
->state
|= VETH_STATE_RESET
;
519 veth_kick_statemachine(cnx
);
521 spin_unlock_irqrestore(&cnx
->lock
, flags
);
524 static void veth_handle_ack(struct veth_lpevent
*event
)
526 HvLpIndex rlp
= event
->base_event
.xTargetLp
;
527 struct veth_lpar_connection
*cnx
= veth_cnx
[rlp
];
531 switch (event
->base_event
.xSubtype
) {
533 veth_take_cap_ack(cnx
, event
);
535 case VETH_EVENT_MONITOR
:
536 veth_take_monitor_ack(cnx
, event
);
539 veth_error("Unknown ack type %d from LPAR %d.\n",
540 event
->base_event
.xSubtype
, rlp
);
544 static void veth_handle_int(struct veth_lpevent
*event
)
546 HvLpIndex rlp
= event
->base_event
.xSourceLp
;
547 struct veth_lpar_connection
*cnx
= veth_cnx
[rlp
];
553 switch (event
->base_event
.xSubtype
) {
555 veth_take_cap(cnx
, event
);
557 case VETH_EVENT_MONITOR
:
558 /* do nothing... this'll hang out here til we're dead,
559 * and the hypervisor will return it for us. */
561 case VETH_EVENT_FRAMES_ACK
:
562 spin_lock_irqsave(&cnx
->lock
, flags
);
564 for (i
= 0; i
< VETH_MAX_ACKS_PER_MSG
; ++i
) {
565 u16 msgnum
= event
->u
.frames_ack_data
.token
[i
];
567 if (msgnum
< VETH_NUMBUFFERS
) {
568 veth_recycle_msg(cnx
, cnx
->msgs
+ msgnum
);
569 cnx
->outstanding_tx
--;
575 cnx
->last_contact
= jiffies
;
576 veth_wake_queues(cnx
);
579 spin_unlock_irqrestore(&cnx
->lock
, flags
);
581 case VETH_EVENT_FRAMES
:
582 veth_receive(cnx
, event
);
585 veth_error("Unknown interrupt type %d from LPAR %d.\n",
586 event
->base_event
.xSubtype
, rlp
);
590 static void veth_handle_event(struct HvLpEvent
*event
, struct pt_regs
*regs
)
592 struct veth_lpevent
*veth_event
= (struct veth_lpevent
*)event
;
594 if (hvlpevent_is_ack(event
))
595 veth_handle_ack(veth_event
);
597 veth_handle_int(veth_event
);
600 static int veth_process_caps(struct veth_lpar_connection
*cnx
)
602 struct veth_cap_data
*remote_caps
= &cnx
->remote_caps
;
605 /* Convert timer to jiffies */
606 cnx
->ack_timeout
= remote_caps
->ack_timeout
* HZ
/ 1000000;
608 if ( (remote_caps
->num_buffers
== 0)
609 || (remote_caps
->ack_threshold
> VETH_MAX_ACKS_PER_MSG
)
610 || (remote_caps
->ack_threshold
== 0)
611 || (cnx
->ack_timeout
== 0) ) {
612 veth_error("Received incompatible capabilities from LPAR %d.\n",
614 return HvLpEvent_Rc_InvalidSubtypeData
;
617 num_acks_needed
= (remote_caps
->num_buffers
618 / remote_caps
->ack_threshold
) + 1;
620 /* FIXME: locking on num_ack_events? */
621 if (cnx
->num_ack_events
< num_acks_needed
) {
624 num
= veth_allocate_events(cnx
->remote_lp
,
625 num_acks_needed
-cnx
->num_ack_events
);
627 cnx
->num_ack_events
+= num
;
629 if (cnx
->num_ack_events
< num_acks_needed
) {
630 veth_error("Couldn't allocate enough ack events "
631 "for LPAR %d.\n", cnx
->remote_lp
);
633 return HvLpEvent_Rc_BufferNotAvailable
;
638 return HvLpEvent_Rc_Good
;
641 /* FIXME: The gotos here are a bit dubious */
642 static void veth_statemachine(void *p
)
644 struct veth_lpar_connection
*cnx
= (struct veth_lpar_connection
*)p
;
645 int rlp
= cnx
->remote_lp
;
648 spin_lock_irq(&cnx
->lock
);
651 if (cnx
->state
& VETH_STATE_RESET
) {
652 if (cnx
->state
& VETH_STATE_OPEN
)
653 HvCallEvent_closeLpEventPath(cnx
->remote_lp
,
654 HvLpEvent_Type_VirtualLan
);
657 * Reset ack data. This prevents the ack_timer actually
658 * doing anything, even if it runs one more time when
659 * we drop the lock below.
661 memset(&cnx
->pending_acks
, 0xff, sizeof (cnx
->pending_acks
));
662 cnx
->num_pending_acks
= 0;
664 cnx
->state
&= ~(VETH_STATE_RESET
| VETH_STATE_SENTMON
665 | VETH_STATE_OPEN
| VETH_STATE_SENTCAPS
666 | VETH_STATE_GOTCAPACK
| VETH_STATE_GOTCAPS
667 | VETH_STATE_SENTCAPACK
| VETH_STATE_READY
);
669 /* Clean up any leftover messages */
672 for (i
= 0; i
< VETH_NUMBUFFERS
; ++i
)
673 veth_recycle_msg(cnx
, cnx
->msgs
+ i
);
676 cnx
->outstanding_tx
= 0;
677 veth_wake_queues(cnx
);
679 /* Drop the lock so we can do stuff that might sleep or
680 * take other locks. */
681 spin_unlock_irq(&cnx
->lock
);
683 del_timer_sync(&cnx
->ack_timer
);
684 del_timer_sync(&cnx
->reset_timer
);
686 spin_lock_irq(&cnx
->lock
);
688 if (cnx
->state
& VETH_STATE_RESET
)
691 /* Hack, wait for the other end to reset itself. */
692 if (! (cnx
->state
& VETH_STATE_SHUTDOWN
)) {
693 schedule_delayed_work(&cnx
->statemachine_wq
, 5 * HZ
);
698 if (cnx
->state
& VETH_STATE_SHUTDOWN
)
699 /* It's all over, do nothing */
702 if ( !(cnx
->state
& VETH_STATE_OPEN
) ) {
703 if (! cnx
->msgs
|| (cnx
->num_events
< (2 + VETH_NUMBUFFERS
)) )
706 HvCallEvent_openLpEventPath(rlp
, HvLpEvent_Type_VirtualLan
);
708 HvCallEvent_getSourceLpInstanceId(rlp
,
709 HvLpEvent_Type_VirtualLan
);
711 HvCallEvent_getTargetLpInstanceId(rlp
,
712 HvLpEvent_Type_VirtualLan
);
713 cnx
->state
|= VETH_STATE_OPEN
;
716 if ( (cnx
->state
& VETH_STATE_OPEN
)
717 && !(cnx
->state
& VETH_STATE_SENTMON
) ) {
718 rc
= veth_signalevent(cnx
, VETH_EVENT_MONITOR
,
719 HvLpEvent_AckInd_DoAck
,
720 HvLpEvent_AckType_DeferredAck
,
723 if (rc
== HvLpEvent_Rc_Good
) {
724 cnx
->state
|= VETH_STATE_SENTMON
;
726 if ( (rc
!= HvLpEvent_Rc_PartitionDead
)
727 && (rc
!= HvLpEvent_Rc_PathClosed
) )
728 veth_error("Error sending monitor to LPAR %d, "
729 "rc = %d\n", rlp
, rc
);
731 /* Oh well, hope we get a cap from the other
732 * end and do better when that kicks us */
737 if ( (cnx
->state
& VETH_STATE_OPEN
)
738 && !(cnx
->state
& VETH_STATE_SENTCAPS
)) {
739 u64
*rawcap
= (u64
*)&cnx
->local_caps
;
741 rc
= veth_signalevent(cnx
, VETH_EVENT_CAP
,
742 HvLpEvent_AckInd_DoAck
,
743 HvLpEvent_AckType_ImmediateAck
,
744 0, rawcap
[0], rawcap
[1], rawcap
[2],
745 rawcap
[3], rawcap
[4]);
747 if (rc
== HvLpEvent_Rc_Good
) {
748 cnx
->state
|= VETH_STATE_SENTCAPS
;
750 if ( (rc
!= HvLpEvent_Rc_PartitionDead
)
751 && (rc
!= HvLpEvent_Rc_PathClosed
) )
752 veth_error("Error sending caps to LPAR %d, "
753 "rc = %d\n", rlp
, rc
);
755 /* Oh well, hope we get a cap from the other
756 * end and do better when that kicks us */
761 if ((cnx
->state
& VETH_STATE_GOTCAPS
)
762 && !(cnx
->state
& VETH_STATE_SENTCAPACK
)) {
763 struct veth_cap_data
*remote_caps
= &cnx
->remote_caps
;
765 memcpy(remote_caps
, &cnx
->cap_event
.u
.caps_data
,
766 sizeof(*remote_caps
));
768 spin_unlock_irq(&cnx
->lock
);
769 rc
= veth_process_caps(cnx
);
770 spin_lock_irq(&cnx
->lock
);
772 /* We dropped the lock, so recheck for anything which
773 * might mess us up */
774 if (cnx
->state
& (VETH_STATE_RESET
|VETH_STATE_SHUTDOWN
))
777 cnx
->cap_event
.base_event
.xRc
= rc
;
778 HvCallEvent_ackLpEvent((struct HvLpEvent
*)&cnx
->cap_event
);
779 if (rc
== HvLpEvent_Rc_Good
)
780 cnx
->state
|= VETH_STATE_SENTCAPACK
;
785 if ((cnx
->state
& VETH_STATE_GOTCAPACK
)
786 && (cnx
->state
& VETH_STATE_GOTCAPS
)
787 && !(cnx
->state
& VETH_STATE_READY
)) {
788 if (cnx
->cap_ack_event
.base_event
.xRc
== HvLpEvent_Rc_Good
) {
789 /* Start the ACK timer */
790 cnx
->ack_timer
.expires
= jiffies
+ cnx
->ack_timeout
;
791 add_timer(&cnx
->ack_timer
);
792 cnx
->state
|= VETH_STATE_READY
;
794 veth_error("Caps rejected by LPAR %d, rc = %d\n",
795 rlp
, cnx
->cap_ack_event
.base_event
.xRc
);
801 spin_unlock_irq(&cnx
->lock
);
805 /* FIXME: we get here if something happens we really can't
806 * cope with. The link will never work once we get here, and
807 * all we can do is not lock the rest of the system up */
808 veth_error("Unrecoverable error on connection to LPAR %d, shutting down"
809 " (state = 0x%04lx)\n", rlp
, cnx
->state
);
810 cnx
->state
|= VETH_STATE_SHUTDOWN
;
811 spin_unlock_irq(&cnx
->lock
);
814 static int veth_init_connection(u8 rlp
)
816 struct veth_lpar_connection
*cnx
;
817 struct veth_msg
*msgs
;
820 if ( (rlp
== this_lp
)
821 || ! HvLpConfig_doLpsCommunicateOnVirtualLan(this_lp
, rlp
) )
824 cnx
= kmalloc(sizeof(*cnx
), GFP_KERNEL
);
827 memset(cnx
, 0, sizeof(*cnx
));
829 cnx
->remote_lp
= rlp
;
830 spin_lock_init(&cnx
->lock
);
831 INIT_WORK(&cnx
->statemachine_wq
, veth_statemachine
, cnx
);
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
);
849 cnx
->kobject
.ktype
= &veth_lpar_connection_ktype
;
850 rc
= kobject_set_name(&cnx
->kobject
, "cnx%.2d", rlp
);
854 msgs
= kmalloc(VETH_NUMBUFFERS
* sizeof(struct veth_msg
), GFP_KERNEL
);
856 veth_error("Can't allocate buffers for LPAR %d.\n", rlp
);
861 memset(msgs
, 0, VETH_NUMBUFFERS
* sizeof(struct veth_msg
));
863 for (i
= 0; i
< VETH_NUMBUFFERS
; i
++) {
865 veth_stack_push(cnx
, msgs
+ i
);
868 cnx
->num_events
= veth_allocate_events(rlp
, 2 + VETH_NUMBUFFERS
);
870 if (cnx
->num_events
< (2 + VETH_NUMBUFFERS
)) {
871 veth_error("Can't allocate enough events for LPAR %d.\n", rlp
);
875 cnx
->local_caps
.num_buffers
= VETH_NUMBUFFERS
;
876 cnx
->local_caps
.ack_threshold
= ACK_THRESHOLD
;
877 cnx
->local_caps
.ack_timeout
= VETH_ACKTIMEOUT
;
882 static void veth_stop_connection(struct veth_lpar_connection
*cnx
)
887 spin_lock_irq(&cnx
->lock
);
888 cnx
->state
|= VETH_STATE_RESET
| VETH_STATE_SHUTDOWN
;
889 veth_kick_statemachine(cnx
);
890 spin_unlock_irq(&cnx
->lock
);
892 /* There's a slim chance the reset code has just queued the
893 * statemachine to run in five seconds. If so we need to cancel
894 * that and requeue the work to run now. */
895 if (cancel_delayed_work(&cnx
->statemachine_wq
)) {
896 spin_lock_irq(&cnx
->lock
);
897 veth_kick_statemachine(cnx
);
898 spin_unlock_irq(&cnx
->lock
);
901 /* Wait for the state machine to run. */
902 flush_scheduled_work();
905 static void veth_destroy_connection(struct veth_lpar_connection
*cnx
)
910 if (cnx
->num_events
> 0)
911 mf_deallocate_lp_events(cnx
->remote_lp
,
912 HvLpEvent_Type_VirtualLan
,
915 if (cnx
->num_ack_events
> 0)
916 mf_deallocate_lp_events(cnx
->remote_lp
,
917 HvLpEvent_Type_VirtualLan
,
922 veth_cnx
[cnx
->remote_lp
] = NULL
;
926 static void veth_release_connection(struct kobject
*kobj
)
928 struct veth_lpar_connection
*cnx
;
929 cnx
= container_of(kobj
, struct veth_lpar_connection
, kobject
);
930 veth_stop_connection(cnx
);
931 veth_destroy_connection(cnx
);
938 static int veth_open(struct net_device
*dev
)
940 struct veth_port
*port
= (struct veth_port
*) dev
->priv
;
942 memset(&port
->stats
, 0, sizeof (port
->stats
));
943 netif_start_queue(dev
);
947 static int veth_close(struct net_device
*dev
)
949 netif_stop_queue(dev
);
953 static struct net_device_stats
*veth_get_stats(struct net_device
*dev
)
955 struct veth_port
*port
= (struct veth_port
*) dev
->priv
;
960 static int veth_change_mtu(struct net_device
*dev
, int new_mtu
)
962 if ((new_mtu
< 68) || (new_mtu
> VETH_MAX_MTU
))
968 static void veth_set_multicast_list(struct net_device
*dev
)
970 struct veth_port
*port
= (struct veth_port
*) dev
->priv
;
973 write_lock_irqsave(&port
->mcast_gate
, flags
);
975 if ((dev
->flags
& IFF_PROMISC
) || (dev
->flags
& IFF_ALLMULTI
) ||
976 (dev
->mc_count
> VETH_MAX_MCAST
)) {
977 port
->promiscuous
= 1;
979 struct dev_mc_list
*dmi
= dev
->mc_list
;
982 port
->promiscuous
= 0;
987 for (i
= 0; i
< dev
->mc_count
; i
++) {
988 u8
*addr
= dmi
->dmi_addr
;
991 if (addr
[0] & 0x01) {/* multicast address? */
992 memcpy(&xaddr
, addr
, ETH_ALEN
);
993 port
->mcast_addr
[port
->num_mcast
] = xaddr
;
1000 write_unlock_irqrestore(&port
->mcast_gate
, flags
);
1003 static void veth_get_drvinfo(struct net_device
*dev
, struct ethtool_drvinfo
*info
)
1005 strncpy(info
->driver
, DRV_NAME
, sizeof(info
->driver
) - 1);
1006 info
->driver
[sizeof(info
->driver
) - 1] = '\0';
1007 strncpy(info
->version
, DRV_VERSION
, sizeof(info
->version
) - 1);
1008 info
->version
[sizeof(info
->version
) - 1] = '\0';
1011 static int veth_get_settings(struct net_device
*dev
, struct ethtool_cmd
*ecmd
)
1013 ecmd
->supported
= (SUPPORTED_1000baseT_Full
1014 | SUPPORTED_Autoneg
| SUPPORTED_FIBRE
);
1015 ecmd
->advertising
= (SUPPORTED_1000baseT_Full
1016 | SUPPORTED_Autoneg
| SUPPORTED_FIBRE
);
1017 ecmd
->port
= PORT_FIBRE
;
1018 ecmd
->transceiver
= XCVR_INTERNAL
;
1019 ecmd
->phy_address
= 0;
1020 ecmd
->speed
= SPEED_1000
;
1021 ecmd
->duplex
= DUPLEX_FULL
;
1022 ecmd
->autoneg
= AUTONEG_ENABLE
;
1023 ecmd
->maxtxpkt
= 120;
1024 ecmd
->maxrxpkt
= 120;
1028 static u32
veth_get_link(struct net_device
*dev
)
1033 static struct ethtool_ops ops
= {
1034 .get_drvinfo
= veth_get_drvinfo
,
1035 .get_settings
= veth_get_settings
,
1036 .get_link
= veth_get_link
,
1039 static struct net_device
* __init
veth_probe_one(int vlan
,
1040 struct vio_dev
*vio_dev
)
1042 struct net_device
*dev
;
1043 struct veth_port
*port
;
1044 struct device
*vdev
= &vio_dev
->dev
;
1046 const unsigned char *mac_addr
;
1048 mac_addr
= vio_get_attribute(vio_dev
, "local-mac-address", NULL
);
1049 if (mac_addr
== NULL
)
1050 mac_addr
= vio_get_attribute(vio_dev
, "mac-address", NULL
);
1051 if (mac_addr
== NULL
) {
1052 veth_error("Unable to fetch MAC address from device tree.\n");
1056 dev
= alloc_etherdev(sizeof (struct veth_port
));
1058 veth_error("Unable to allocate net_device structure!\n");
1062 port
= (struct veth_port
*) dev
->priv
;
1064 spin_lock_init(&port
->queue_lock
);
1065 rwlock_init(&port
->mcast_gate
);
1066 port
->stopped_map
= 0;
1068 for (i
= 0; i
< HVMAXARCHITECTEDLPS
; i
++) {
1069 HvLpVirtualLanIndexMap map
;
1073 map
= HvLpConfig_getVirtualLanIndexMapForLp(i
);
1074 if (map
& (0x8000 >> vlan
))
1075 port
->lpar_map
|= (1 << i
);
1079 memcpy(dev
->dev_addr
, mac_addr
, ETH_ALEN
);
1081 dev
->mtu
= VETH_MAX_MTU
;
1083 memcpy(&port
->mac_addr
, mac_addr
, ETH_ALEN
);
1085 dev
->open
= veth_open
;
1086 dev
->hard_start_xmit
= veth_start_xmit
;
1087 dev
->stop
= veth_close
;
1088 dev
->get_stats
= veth_get_stats
;
1089 dev
->change_mtu
= veth_change_mtu
;
1090 dev
->set_mac_address
= NULL
;
1091 dev
->set_multicast_list
= veth_set_multicast_list
;
1092 SET_ETHTOOL_OPS(dev
, &ops
);
1094 SET_NETDEV_DEV(dev
, vdev
);
1096 rc
= register_netdev(dev
);
1098 veth_error("Failed registering net device for vlan%d.\n", vlan
);
1103 kobject_init(&port
->kobject
);
1104 port
->kobject
.parent
= &dev
->class_dev
.kobj
;
1105 port
->kobject
.ktype
= &veth_port_ktype
;
1106 kobject_set_name(&port
->kobject
, "veth_port");
1107 if (0 != kobject_add(&port
->kobject
))
1108 veth_error("Failed adding port for %s to sysfs.\n", dev
->name
);
1110 veth_info("%s attached to iSeries vlan %d (LPAR map = 0x%.4X)\n",
1111 dev
->name
, vlan
, port
->lpar_map
);
1120 static int veth_transmit_to_one(struct sk_buff
*skb
, HvLpIndex rlp
,
1121 struct net_device
*dev
)
1123 struct veth_lpar_connection
*cnx
= veth_cnx
[rlp
];
1124 struct veth_port
*port
= (struct veth_port
*) dev
->priv
;
1126 struct veth_msg
*msg
= NULL
;
1127 unsigned long flags
;
1132 spin_lock_irqsave(&cnx
->lock
, flags
);
1134 if (! (cnx
->state
& VETH_STATE_READY
))
1137 if ((skb
->len
- ETH_HLEN
) > VETH_MAX_MTU
)
1140 msg
= veth_stack_pop(cnx
);
1145 msg
->skb
= skb_get(skb
);
1147 msg
->data
.addr
[0] = dma_map_single(port
->dev
, skb
->data
,
1148 skb
->len
, DMA_TO_DEVICE
);
1150 if (dma_mapping_error(msg
->data
.addr
[0]))
1151 goto recycle_and_drop
;
1153 msg
->dev
= port
->dev
;
1154 msg
->data
.len
[0] = skb
->len
;
1155 msg
->data
.eofmask
= 1 << VETH_EOF_SHIFT
;
1157 rc
= veth_signaldata(cnx
, VETH_EVENT_FRAMES
, msg
->token
, &msg
->data
);
1159 if (rc
!= HvLpEvent_Rc_Good
)
1160 goto recycle_and_drop
;
1162 /* If the timer's not already running, start it now. */
1163 if (0 == cnx
->outstanding_tx
)
1164 mod_timer(&cnx
->reset_timer
, jiffies
+ cnx
->reset_timeout
);
1166 cnx
->last_contact
= jiffies
;
1167 cnx
->outstanding_tx
++;
1169 if (veth_stack_is_empty(cnx
))
1170 veth_stop_queues(cnx
);
1173 spin_unlock_irqrestore(&cnx
->lock
, flags
);
1177 veth_recycle_msg(cnx
, msg
);
1179 spin_unlock_irqrestore(&cnx
->lock
, flags
);
1183 static void veth_transmit_to_many(struct sk_buff
*skb
,
1184 HvLpIndexMap lpmask
,
1185 struct net_device
*dev
)
1187 struct veth_port
*port
= (struct veth_port
*) dev
->priv
;
1188 int i
, success
, error
;
1190 success
= error
= 0;
1192 for (i
= 0; i
< HVMAXARCHITECTEDLPS
; i
++) {
1193 if ((lpmask
& (1 << i
)) == 0)
1196 if (veth_transmit_to_one(skb
, i
, dev
))
1203 port
->stats
.tx_errors
++;
1206 port
->stats
.tx_packets
++;
1207 port
->stats
.tx_bytes
+= skb
->len
;
1211 static int veth_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
1213 unsigned char *frame
= skb
->data
;
1214 struct veth_port
*port
= (struct veth_port
*) dev
->priv
;
1215 HvLpIndexMap lpmask
;
1217 if (! (frame
[0] & 0x01)) {
1218 /* unicast packet */
1219 HvLpIndex rlp
= frame
[5];
1221 if ( ! ((1 << rlp
) & port
->lpar_map
) ) {
1228 lpmask
= port
->lpar_map
;
1231 veth_transmit_to_many(skb
, lpmask
, dev
);
1238 /* You must hold the connection's lock when you call this function. */
1239 static void veth_recycle_msg(struct veth_lpar_connection
*cnx
,
1240 struct veth_msg
*msg
)
1242 u32 dma_address
, dma_length
;
1246 dma_address
= msg
->data
.addr
[0];
1247 dma_length
= msg
->data
.len
[0];
1249 if (!dma_mapping_error(dma_address
))
1250 dma_unmap_single(msg
->dev
, dma_address
, dma_length
,
1254 dev_kfree_skb_any(msg
->skb
);
1258 memset(&msg
->data
, 0, sizeof(msg
->data
));
1259 veth_stack_push(cnx
, msg
);
1260 } else if (cnx
->state
& VETH_STATE_OPEN
) {
1261 veth_error("Non-pending frame (# %d) acked by LPAR %d.\n",
1262 cnx
->remote_lp
, msg
->token
);
1266 static void veth_wake_queues(struct veth_lpar_connection
*cnx
)
1270 for (i
= 0; i
< HVMAXARCHITECTEDVIRTUALLANS
; i
++) {
1271 struct net_device
*dev
= veth_dev
[i
];
1272 struct veth_port
*port
;
1273 unsigned long flags
;
1278 port
= (struct veth_port
*)dev
->priv
;
1280 if (! (port
->lpar_map
& (1<<cnx
->remote_lp
)))
1283 spin_lock_irqsave(&port
->queue_lock
, flags
);
1285 port
->stopped_map
&= ~(1 << cnx
->remote_lp
);
1287 if (0 == port
->stopped_map
&& netif_queue_stopped(dev
)) {
1288 veth_debug("cnx %d: woke queue for %s.\n",
1289 cnx
->remote_lp
, dev
->name
);
1290 netif_wake_queue(dev
);
1292 spin_unlock_irqrestore(&port
->queue_lock
, flags
);
1296 static void veth_stop_queues(struct veth_lpar_connection
*cnx
)
1300 for (i
= 0; i
< HVMAXARCHITECTEDVIRTUALLANS
; i
++) {
1301 struct net_device
*dev
= veth_dev
[i
];
1302 struct veth_port
*port
;
1307 port
= (struct veth_port
*)dev
->priv
;
1309 /* If this cnx is not on the vlan for this port, continue */
1310 if (! (port
->lpar_map
& (1 << cnx
->remote_lp
)))
1313 spin_lock(&port
->queue_lock
);
1315 netif_stop_queue(dev
);
1316 port
->stopped_map
|= (1 << cnx
->remote_lp
);
1318 veth_debug("cnx %d: stopped queue for %s, map = 0x%x.\n",
1319 cnx
->remote_lp
, dev
->name
, port
->stopped_map
);
1321 spin_unlock(&port
->queue_lock
);
1325 static void veth_timed_reset(unsigned long ptr
)
1327 struct veth_lpar_connection
*cnx
= (struct veth_lpar_connection
*)ptr
;
1328 unsigned long trigger_time
, flags
;
1330 /* FIXME is it possible this fires after veth_stop_connection()?
1331 * That would reschedule the statemachine for 5 seconds and probably
1332 * execute it after the module's been unloaded. Hmm. */
1334 spin_lock_irqsave(&cnx
->lock
, flags
);
1336 if (cnx
->outstanding_tx
> 0) {
1337 trigger_time
= cnx
->last_contact
+ cnx
->reset_timeout
;
1339 if (trigger_time
< jiffies
) {
1340 cnx
->state
|= VETH_STATE_RESET
;
1341 veth_kick_statemachine(cnx
);
1342 veth_error("%d packets not acked by LPAR %d within %d "
1343 "seconds, resetting.\n",
1344 cnx
->outstanding_tx
, cnx
->remote_lp
,
1345 cnx
->reset_timeout
/ HZ
);
1347 /* Reschedule the timer */
1348 trigger_time
= jiffies
+ cnx
->reset_timeout
;
1349 mod_timer(&cnx
->reset_timer
, trigger_time
);
1353 spin_unlock_irqrestore(&cnx
->lock
, flags
);
1360 static inline int veth_frame_wanted(struct veth_port
*port
, u64 mac_addr
)
1364 unsigned long flags
;
1366 if ( (mac_addr
== port
->mac_addr
) || (mac_addr
== 0xffffffffffff0000) )
1369 read_lock_irqsave(&port
->mcast_gate
, flags
);
1371 if (port
->promiscuous
) {
1376 for (i
= 0; i
< port
->num_mcast
; ++i
) {
1377 if (port
->mcast_addr
[i
] == mac_addr
) {
1384 read_unlock_irqrestore(&port
->mcast_gate
, flags
);
1394 #define VETH_MAX_PAGES_PER_FRAME ( (VETH_MAX_MTU+PAGE_SIZE-2)/PAGE_SIZE + 1 )
1396 static inline void veth_build_dma_list(struct dma_chunk
*list
,
1397 unsigned char *p
, unsigned long length
)
1402 /* FIXME: skbs are continguous in real addresses. Do we
1403 * really need to break it into PAGE_SIZE chunks, or can we do
1404 * it just at the granularity of iSeries real->absolute
1405 * mapping? Indeed, given the way the allocator works, can we
1406 * count on them being absolutely contiguous? */
1407 list
[0].addr
= iseries_hv_addr(p
);
1408 list
[0].size
= min(length
,
1409 PAGE_SIZE
- ((unsigned long)p
& ~PAGE_MASK
));
1411 done
= list
[0].size
;
1412 while (done
< length
) {
1413 list
[i
].addr
= iseries_hv_addr(p
+ done
);
1414 list
[i
].size
= min(length
-done
, PAGE_SIZE
);
1415 done
+= list
[i
].size
;
1420 static void veth_flush_acks(struct veth_lpar_connection
*cnx
)
1424 rc
= veth_signaldata(cnx
, VETH_EVENT_FRAMES_ACK
,
1425 0, &cnx
->pending_acks
);
1427 if (rc
!= HvLpEvent_Rc_Good
)
1428 veth_error("Failed acking frames from LPAR %d, rc = %d\n",
1429 cnx
->remote_lp
, (int)rc
);
1431 cnx
->num_pending_acks
= 0;
1432 memset(&cnx
->pending_acks
, 0xff, sizeof(cnx
->pending_acks
));
1435 static void veth_receive(struct veth_lpar_connection
*cnx
,
1436 struct veth_lpevent
*event
)
1438 struct veth_frames_data
*senddata
= &event
->u
.frames_data
;
1441 unsigned long flags
;
1446 struct sk_buff
*skb
;
1447 struct dma_chunk local_list
[VETH_MAX_PAGES_PER_FRAME
];
1448 struct dma_chunk remote_list
[VETH_MAX_FRAMES_PER_MSG
];
1450 HvLpVirtualLanIndex vlan
;
1451 struct net_device
*dev
;
1452 struct veth_port
*port
;
1454 /* FIXME: do we need this? */
1455 memset(local_list
, 0, sizeof(local_list
));
1456 memset(remote_list
, 0, sizeof(VETH_MAX_FRAMES_PER_MSG
));
1458 /* a 0 address marks the end of the valid entries */
1459 if (senddata
->addr
[startchunk
] == 0)
1462 /* make sure that we have at least 1 EOF entry in the
1463 * remaining entries */
1464 if (! (senddata
->eofmask
>> (startchunk
+ VETH_EOF_SHIFT
))) {
1465 veth_error("Missing EOF fragment in event "
1466 "eofmask = 0x%x startchunk = %d\n",
1467 (unsigned)senddata
->eofmask
,
1472 /* build list of chunks in this frame */
1475 remote_list
[nchunks
].addr
=
1476 (u64
) senddata
->addr
[startchunk
+nchunks
] << 32;
1477 remote_list
[nchunks
].size
=
1478 senddata
->len
[startchunk
+nchunks
];
1479 length
+= remote_list
[nchunks
].size
;
1480 } while (! (senddata
->eofmask
&
1481 (1 << (VETH_EOF_SHIFT
+ startchunk
+ nchunks
++))));
1483 /* length == total length of all chunks */
1484 /* nchunks == # of chunks in this frame */
1486 if ((length
- ETH_HLEN
) > VETH_MAX_MTU
) {
1487 veth_error("Received oversize frame from LPAR %d "
1489 cnx
->remote_lp
, length
);
1493 skb
= alloc_skb(length
, GFP_ATOMIC
);
1497 veth_build_dma_list(local_list
, skb
->data
, length
);
1499 rc
= HvCallEvent_dmaBufList(HvLpEvent_Type_VirtualLan
,
1500 event
->base_event
.xSourceLp
,
1501 HvLpDma_Direction_RemoteToLocal
,
1504 HvLpDma_AddressType_RealAddress
,
1505 HvLpDma_AddressType_TceIndex
,
1506 iseries_hv_addr(&local_list
),
1507 iseries_hv_addr(&remote_list
),
1509 if (rc
!= HvLpDma_Rc_Good
) {
1510 dev_kfree_skb_irq(skb
);
1514 vlan
= skb
->data
[9];
1515 dev
= veth_dev
[vlan
];
1518 * Some earlier versions of the driver sent
1519 * broadcasts down all connections, even to lpars
1520 * that weren't on the relevant vlan. So ignore
1521 * packets belonging to a vlan we're not on.
1522 * We can also be here if we receive packets while
1523 * the driver is going down, because then dev is NULL.
1525 dev_kfree_skb_irq(skb
);
1529 port
= (struct veth_port
*)dev
->priv
;
1530 dest
= *((u64
*) skb
->data
) & 0xFFFFFFFFFFFF0000;
1532 if ((vlan
> HVMAXARCHITECTEDVIRTUALLANS
) || !port
) {
1533 dev_kfree_skb_irq(skb
);
1536 if (! veth_frame_wanted(port
, dest
)) {
1537 dev_kfree_skb_irq(skb
);
1541 skb_put(skb
, length
);
1543 skb
->protocol
= eth_type_trans(skb
, dev
);
1544 skb
->ip_summed
= CHECKSUM_NONE
;
1545 netif_rx(skb
); /* send it up */
1546 port
->stats
.rx_packets
++;
1547 port
->stats
.rx_bytes
+= length
;
1548 } while (startchunk
+= nchunks
, startchunk
< VETH_MAX_FRAMES_PER_MSG
);
1551 spin_lock_irqsave(&cnx
->lock
, flags
);
1552 BUG_ON(cnx
->num_pending_acks
> VETH_MAX_ACKS_PER_MSG
);
1554 cnx
->pending_acks
[cnx
->num_pending_acks
++] =
1555 event
->base_event
.xCorrelationToken
;
1557 if ( (cnx
->num_pending_acks
>= cnx
->remote_caps
.ack_threshold
)
1558 || (cnx
->num_pending_acks
>= VETH_MAX_ACKS_PER_MSG
) )
1559 veth_flush_acks(cnx
);
1561 spin_unlock_irqrestore(&cnx
->lock
, flags
);
1564 static void veth_timed_ack(unsigned long ptr
)
1566 struct veth_lpar_connection
*cnx
= (struct veth_lpar_connection
*) ptr
;
1567 unsigned long flags
;
1569 /* Ack all the events */
1570 spin_lock_irqsave(&cnx
->lock
, flags
);
1571 if (cnx
->num_pending_acks
> 0)
1572 veth_flush_acks(cnx
);
1574 /* Reschedule the timer */
1575 cnx
->ack_timer
.expires
= jiffies
+ cnx
->ack_timeout
;
1576 add_timer(&cnx
->ack_timer
);
1577 spin_unlock_irqrestore(&cnx
->lock
, flags
);
1580 static int veth_remove(struct vio_dev
*vdev
)
1582 struct veth_lpar_connection
*cnx
;
1583 struct net_device
*dev
;
1584 struct veth_port
*port
;
1587 dev
= veth_dev
[vdev
->unit_address
];
1592 port
= netdev_priv(dev
);
1594 for (i
= 0; i
< HVMAXARCHITECTEDLPS
; i
++) {
1597 if (cnx
&& (port
->lpar_map
& (1 << i
))) {
1598 /* Drop our reference to connections on our VLAN */
1599 kobject_put(&cnx
->kobject
);
1603 veth_dev
[vdev
->unit_address
] = NULL
;
1604 kobject_del(&port
->kobject
);
1605 kobject_put(&port
->kobject
);
1606 unregister_netdev(dev
);
1612 static int veth_probe(struct vio_dev
*vdev
, const struct vio_device_id
*id
)
1614 int i
= vdev
->unit_address
;
1615 struct net_device
*dev
;
1616 struct veth_port
*port
;
1618 dev
= veth_probe_one(i
, vdev
);
1625 port
= (struct veth_port
*)netdev_priv(dev
);
1627 /* Start the state machine on each connection on this vlan. If we're
1628 * the first dev to do so this will commence link negotiation */
1629 for (i
= 0; i
< HVMAXARCHITECTEDLPS
; i
++) {
1630 struct veth_lpar_connection
*cnx
;
1632 if (! (port
->lpar_map
& (1 << i
)))
1639 kobject_get(&cnx
->kobject
);
1640 veth_kick_statemachine(cnx
);
1647 * veth_device_table: Used by vio.c to match devices that we
1650 static struct vio_device_id veth_device_table
[] __devinitdata
= {
1651 { "network", "IBM,iSeries-l-lan" },
1654 MODULE_DEVICE_TABLE(vio
, veth_device_table
);
1656 static struct vio_driver veth_driver
= {
1657 .id_table
= veth_device_table
,
1658 .probe
= veth_probe
,
1659 .remove
= veth_remove
,
1662 .owner
= THIS_MODULE
,
1667 * Module initialization/cleanup
1670 void __exit
veth_module_cleanup(void)
1673 struct veth_lpar_connection
*cnx
;
1675 /* Disconnect our "irq" to stop events coming from the Hypervisor. */
1676 HvLpEvent_unregisterHandler(HvLpEvent_Type_VirtualLan
);
1678 /* Make sure any work queued from Hypervisor callbacks is finished. */
1679 flush_scheduled_work();
1681 for (i
= 0; i
< HVMAXARCHITECTEDLPS
; ++i
) {
1687 /* Remove the connection from sysfs */
1688 kobject_del(&cnx
->kobject
);
1689 /* Drop the driver's reference to the connection */
1690 kobject_put(&cnx
->kobject
);
1693 /* Unregister the driver, which will close all the netdevs and stop
1694 * the connections when they're no longer referenced. */
1695 vio_unregister_driver(&veth_driver
);
1697 module_exit(veth_module_cleanup
);
1699 int __init
veth_module_init(void)
1704 this_lp
= HvLpConfig_getLpIndex_outline();
1706 for (i
= 0; i
< HVMAXARCHITECTEDLPS
; ++i
) {
1707 rc
= veth_init_connection(i
);
1712 HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan
,
1713 &veth_handle_event
);
1715 rc
= vio_register_driver(&veth_driver
);
1719 for (i
= 0; i
< HVMAXARCHITECTEDLPS
; ++i
) {
1720 struct kobject
*kobj
;
1725 kobj
= &veth_cnx
[i
]->kobject
;
1726 kobj
->parent
= &veth_driver
.driver
.kobj
;
1727 /* If the add failes, complain but otherwise continue */
1728 if (0 != kobject_add(kobj
))
1729 veth_error("cnx %d: Failed adding to sysfs.\n", i
);
1735 for (i
= 0; i
< HVMAXARCHITECTEDLPS
; ++i
) {
1736 veth_destroy_connection(veth_cnx
[i
]);
1741 module_init(veth_module_init
);