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1da177e4 LT |
1 | /* File veth.c created by Kyle A. Lucke on Mon Aug 7 2000. */ |
2 | /* | |
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 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of the | |
11 | * License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
21 | * USA | |
22 | * | |
23 | * | |
24 | * This module implements the virtual ethernet device for iSeries LPAR | |
25 | * Linux. It uses hypervisor message passing to implement an | |
26 | * ethernet-like network device communicating between partitions on | |
27 | * the iSeries. | |
28 | * | |
29 | * The iSeries LPAR hypervisor currently allows for up to 16 different | |
30 | * virtual ethernets. These are all dynamically configurable on | |
31 | * OS/400 partitions, but dynamic configuration is not supported under | |
32 | * Linux yet. An ethXX network device will be created for each | |
33 | * virtual ethernet this partition is connected to. | |
34 | * | |
35 | * - This driver is responsible for routing packets to and from other | |
36 | * partitions. The MAC addresses used by the virtual ethernets | |
37 | * contains meaning and must not be modified. | |
38 | * | |
39 | * - Having 2 virtual ethernets to the same remote partition DOES NOT | |
40 | * double the available bandwidth. The 2 devices will share the | |
41 | * available hypervisor bandwidth. | |
42 | * | |
43 | * - If you send a packet to your own mac address, it will just be | |
44 | * dropped, you won't get it on the receive side. | |
45 | * | |
46 | * - Multicast is implemented by sending the frame frame to every | |
47 | * other partition. It is the responsibility of the receiving | |
48 | * partition to filter the addresses desired. | |
49 | * | |
50 | * Tunable parameters: | |
51 | * | |
52 | * VETH_NUMBUFFERS: This compile time option defaults to 120. It | |
53 | * controls how much memory Linux will allocate per remote partition | |
54 | * it is communicating with. It can be thought of as the maximum | |
55 | * number of packets outstanding to a remote partition at a time. | |
56 | */ | |
57 | ||
58 | #include <linux/config.h> | |
59 | #include <linux/module.h> | |
60 | #include <linux/version.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> | |
70 | #include <linux/mm.h> | |
71 | #include <linux/ethtool.h> | |
72 | #include <asm/iSeries/mf.h> | |
73 | #include <asm/iSeries/iSeries_pci.h> | |
74 | #include <asm/uaccess.h> | |
75 | ||
76 | #include <asm/iSeries/HvLpConfig.h> | |
77 | #include <asm/iSeries/HvTypes.h> | |
78 | #include <asm/iSeries/HvLpEvent.h> | |
79 | #include <asm/iommu.h> | |
80 | #include <asm/vio.h> | |
81 | ||
61a3c696 ME |
82 | #undef DEBUG |
83 | ||
1da177e4 LT |
84 | #include "iseries_veth.h" |
85 | ||
86 | MODULE_AUTHOR("Kyle Lucke <klucke@us.ibm.com>"); | |
87 | MODULE_DESCRIPTION("iSeries Virtual ethernet driver"); | |
88 | MODULE_LICENSE("GPL"); | |
89 | ||
90 | #define VETH_NUMBUFFERS (120) | |
91 | #define VETH_ACKTIMEOUT (1000000) /* microseconds */ | |
92 | #define VETH_MAX_MCAST (12) | |
93 | ||
94 | #define VETH_MAX_MTU (9000) | |
95 | ||
96 | #if VETH_NUMBUFFERS < 10 | |
97 | #define ACK_THRESHOLD (1) | |
98 | #elif VETH_NUMBUFFERS < 20 | |
99 | #define ACK_THRESHOLD (4) | |
100 | #elif VETH_NUMBUFFERS < 40 | |
101 | #define ACK_THRESHOLD (10) | |
102 | #else | |
103 | #define ACK_THRESHOLD (20) | |
104 | #endif | |
105 | ||
106 | #define VETH_STATE_SHUTDOWN (0x0001) | |
107 | #define VETH_STATE_OPEN (0x0002) | |
108 | #define VETH_STATE_RESET (0x0004) | |
109 | #define VETH_STATE_SENTMON (0x0008) | |
110 | #define VETH_STATE_SENTCAPS (0x0010) | |
111 | #define VETH_STATE_GOTCAPACK (0x0020) | |
112 | #define VETH_STATE_GOTCAPS (0x0040) | |
113 | #define VETH_STATE_SENTCAPACK (0x0080) | |
114 | #define VETH_STATE_READY (0x0100) | |
115 | ||
116 | struct veth_msg { | |
117 | struct veth_msg *next; | |
118 | struct VethFramesData data; | |
119 | int token; | |
b08bd5c0 | 120 | int in_use; |
1da177e4 LT |
121 | struct sk_buff *skb; |
122 | struct device *dev; | |
123 | }; | |
124 | ||
125 | struct veth_lpar_connection { | |
126 | HvLpIndex remote_lp; | |
127 | struct work_struct statemachine_wq; | |
128 | struct veth_msg *msgs; | |
129 | int num_events; | |
130 | struct VethCapData local_caps; | |
131 | ||
f0c129ca | 132 | struct kobject kobject; |
1da177e4 LT |
133 | struct timer_list ack_timer; |
134 | ||
24562ffa ME |
135 | struct timer_list reset_timer; |
136 | unsigned int reset_timeout; | |
137 | unsigned long last_contact; | |
138 | int outstanding_tx; | |
139 | ||
1da177e4 LT |
140 | spinlock_t lock; |
141 | unsigned long state; | |
142 | HvLpInstanceId src_inst; | |
143 | HvLpInstanceId dst_inst; | |
144 | struct VethLpEvent cap_event, cap_ack_event; | |
145 | u16 pending_acks[VETH_MAX_ACKS_PER_MSG]; | |
146 | u32 num_pending_acks; | |
147 | ||
148 | int num_ack_events; | |
149 | struct VethCapData remote_caps; | |
150 | u32 ack_timeout; | |
151 | ||
1da177e4 LT |
152 | struct veth_msg *msg_stack_head; |
153 | }; | |
154 | ||
155 | struct veth_port { | |
156 | struct device *dev; | |
157 | struct net_device_stats stats; | |
158 | u64 mac_addr; | |
159 | HvLpIndexMap lpar_map; | |
160 | ||
e0808494 ME |
161 | /* queue_lock protects the stopped_map and dev's queue. */ |
162 | spinlock_t queue_lock; | |
163 | HvLpIndexMap stopped_map; | |
1da177e4 | 164 | |
e0808494 | 165 | /* mcast_gate protects promiscuous, num_mcast & mcast_addr. */ |
1da177e4 LT |
166 | rwlock_t mcast_gate; |
167 | int promiscuous; | |
1da177e4 LT |
168 | int num_mcast; |
169 | u64 mcast_addr[VETH_MAX_MCAST]; | |
07a5c172 ME |
170 | |
171 | struct kobject kobject; | |
1da177e4 LT |
172 | }; |
173 | ||
174 | static HvLpIndex this_lp; | |
175 | static struct veth_lpar_connection *veth_cnx[HVMAXARCHITECTEDLPS]; /* = 0 */ | |
176 | static struct net_device *veth_dev[HVMAXARCHITECTEDVIRTUALLANS]; /* = 0 */ | |
177 | ||
178 | static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev); | |
179 | static void veth_recycle_msg(struct veth_lpar_connection *, struct veth_msg *); | |
e0808494 ME |
180 | static void veth_wake_queues(struct veth_lpar_connection *cnx); |
181 | static void veth_stop_queues(struct veth_lpar_connection *cnx); | |
1da177e4 | 182 | static void veth_receive(struct veth_lpar_connection *, struct VethLpEvent *); |
f0c129ca | 183 | static void veth_release_connection(struct kobject *kobject); |
24562ffa ME |
184 | static void veth_timed_ack(unsigned long ptr); |
185 | static void veth_timed_reset(unsigned long ptr); | |
f0c129ca | 186 | |
1da177e4 LT |
187 | /* |
188 | * Utility functions | |
189 | */ | |
190 | ||
61a3c696 ME |
191 | #define veth_info(fmt, args...) \ |
192 | printk(KERN_INFO "iseries_veth: " fmt, ## args) | |
1da177e4 LT |
193 | |
194 | #define veth_error(fmt, args...) \ | |
61a3c696 ME |
195 | printk(KERN_ERR "iseries_veth: Error: " fmt, ## args) |
196 | ||
197 | #ifdef DEBUG | |
198 | #define veth_debug(fmt, args...) \ | |
199 | printk(KERN_DEBUG "iseries_veth: " fmt, ## args) | |
200 | #else | |
201 | #define veth_debug(fmt, args...) do {} while (0) | |
202 | #endif | |
1da177e4 | 203 | |
d7893ddd | 204 | /* You must hold the connection's lock when you call this function. */ |
1da177e4 LT |
205 | static inline void veth_stack_push(struct veth_lpar_connection *cnx, |
206 | struct veth_msg *msg) | |
207 | { | |
1da177e4 LT |
208 | msg->next = cnx->msg_stack_head; |
209 | cnx->msg_stack_head = msg; | |
1da177e4 LT |
210 | } |
211 | ||
d7893ddd | 212 | /* You must hold the connection's lock when you call this function. */ |
1da177e4 LT |
213 | static inline struct veth_msg *veth_stack_pop(struct veth_lpar_connection *cnx) |
214 | { | |
1da177e4 LT |
215 | struct veth_msg *msg; |
216 | ||
1da177e4 LT |
217 | msg = cnx->msg_stack_head; |
218 | if (msg) | |
219 | cnx->msg_stack_head = cnx->msg_stack_head->next; | |
d7893ddd | 220 | |
1da177e4 LT |
221 | return msg; |
222 | } | |
223 | ||
e0808494 ME |
224 | /* You must hold the connection's lock when you call this function. */ |
225 | static inline int veth_stack_is_empty(struct veth_lpar_connection *cnx) | |
226 | { | |
227 | return cnx->msg_stack_head == NULL; | |
228 | } | |
229 | ||
1da177e4 LT |
230 | static inline HvLpEvent_Rc |
231 | veth_signalevent(struct veth_lpar_connection *cnx, u16 subtype, | |
232 | HvLpEvent_AckInd ackind, HvLpEvent_AckType acktype, | |
233 | u64 token, | |
234 | u64 data1, u64 data2, u64 data3, u64 data4, u64 data5) | |
235 | { | |
236 | return HvCallEvent_signalLpEventFast(cnx->remote_lp, | |
237 | HvLpEvent_Type_VirtualLan, | |
238 | subtype, ackind, acktype, | |
239 | cnx->src_inst, | |
240 | cnx->dst_inst, | |
241 | token, data1, data2, data3, | |
242 | data4, data5); | |
243 | } | |
244 | ||
245 | static inline HvLpEvent_Rc veth_signaldata(struct veth_lpar_connection *cnx, | |
246 | u16 subtype, u64 token, void *data) | |
247 | { | |
248 | u64 *p = (u64 *) data; | |
249 | ||
250 | return veth_signalevent(cnx, subtype, HvLpEvent_AckInd_NoAck, | |
251 | HvLpEvent_AckType_ImmediateAck, | |
252 | token, p[0], p[1], p[2], p[3], p[4]); | |
253 | } | |
254 | ||
255 | struct veth_allocation { | |
256 | struct completion c; | |
257 | int num; | |
258 | }; | |
259 | ||
260 | static void veth_complete_allocation(void *parm, int number) | |
261 | { | |
262 | struct veth_allocation *vc = (struct veth_allocation *)parm; | |
263 | ||
264 | vc->num = number; | |
265 | complete(&vc->c); | |
266 | } | |
267 | ||
268 | static int veth_allocate_events(HvLpIndex rlp, int number) | |
269 | { | |
270 | struct veth_allocation vc = { COMPLETION_INITIALIZER(vc.c), 0 }; | |
271 | ||
272 | mf_allocate_lp_events(rlp, HvLpEvent_Type_VirtualLan, | |
273 | sizeof(struct VethLpEvent), number, | |
274 | &veth_complete_allocation, &vc); | |
275 | wait_for_completion(&vc.c); | |
276 | ||
277 | return vc.num; | |
278 | } | |
279 | ||
76812d81 ME |
280 | /* |
281 | * sysfs support | |
282 | */ | |
283 | ||
284 | struct veth_cnx_attribute { | |
285 | struct attribute attr; | |
286 | ssize_t (*show)(struct veth_lpar_connection *, char *buf); | |
287 | ssize_t (*store)(struct veth_lpar_connection *, const char *buf); | |
288 | }; | |
289 | ||
290 | static ssize_t veth_cnx_attribute_show(struct kobject *kobj, | |
291 | struct attribute *attr, char *buf) | |
292 | { | |
293 | struct veth_cnx_attribute *cnx_attr; | |
294 | struct veth_lpar_connection *cnx; | |
295 | ||
296 | cnx_attr = container_of(attr, struct veth_cnx_attribute, attr); | |
297 | cnx = container_of(kobj, struct veth_lpar_connection, kobject); | |
298 | ||
299 | if (!cnx_attr->show) | |
300 | return -EIO; | |
301 | ||
302 | return cnx_attr->show(cnx, buf); | |
303 | } | |
304 | ||
305 | #define CUSTOM_CNX_ATTR(_name, _format, _expression) \ | |
306 | static ssize_t _name##_show(struct veth_lpar_connection *cnx, char *buf)\ | |
307 | { \ | |
308 | return sprintf(buf, _format, _expression); \ | |
309 | } \ | |
310 | struct veth_cnx_attribute veth_cnx_attr_##_name = __ATTR_RO(_name) | |
311 | ||
312 | #define SIMPLE_CNX_ATTR(_name) \ | |
313 | CUSTOM_CNX_ATTR(_name, "%lu\n", (unsigned long)cnx->_name) | |
314 | ||
315 | SIMPLE_CNX_ATTR(outstanding_tx); | |
316 | SIMPLE_CNX_ATTR(remote_lp); | |
317 | SIMPLE_CNX_ATTR(num_events); | |
318 | SIMPLE_CNX_ATTR(src_inst); | |
319 | SIMPLE_CNX_ATTR(dst_inst); | |
320 | SIMPLE_CNX_ATTR(num_pending_acks); | |
321 | SIMPLE_CNX_ATTR(num_ack_events); | |
322 | CUSTOM_CNX_ATTR(ack_timeout, "%d\n", jiffies_to_msecs(cnx->ack_timeout)); | |
323 | CUSTOM_CNX_ATTR(reset_timeout, "%d\n", jiffies_to_msecs(cnx->reset_timeout)); | |
324 | CUSTOM_CNX_ATTR(state, "0x%.4lX\n", cnx->state); | |
325 | CUSTOM_CNX_ATTR(last_contact, "%d\n", cnx->last_contact ? | |
326 | jiffies_to_msecs(jiffies - cnx->last_contact) : 0); | |
327 | ||
328 | #define GET_CNX_ATTR(_name) (&veth_cnx_attr_##_name.attr) | |
329 | ||
330 | static struct attribute *veth_cnx_default_attrs[] = { | |
331 | GET_CNX_ATTR(outstanding_tx), | |
332 | GET_CNX_ATTR(remote_lp), | |
333 | GET_CNX_ATTR(num_events), | |
334 | GET_CNX_ATTR(reset_timeout), | |
335 | GET_CNX_ATTR(last_contact), | |
336 | GET_CNX_ATTR(state), | |
337 | GET_CNX_ATTR(src_inst), | |
338 | GET_CNX_ATTR(dst_inst), | |
339 | GET_CNX_ATTR(num_pending_acks), | |
340 | GET_CNX_ATTR(num_ack_events), | |
341 | GET_CNX_ATTR(ack_timeout), | |
342 | NULL | |
343 | }; | |
344 | ||
345 | static struct sysfs_ops veth_cnx_sysfs_ops = { | |
346 | .show = veth_cnx_attribute_show | |
347 | }; | |
348 | ||
349 | static struct kobj_type veth_lpar_connection_ktype = { | |
350 | .release = veth_release_connection, | |
351 | .sysfs_ops = &veth_cnx_sysfs_ops, | |
352 | .default_attrs = veth_cnx_default_attrs | |
353 | }; | |
354 | ||
07a5c172 ME |
355 | struct veth_port_attribute { |
356 | struct attribute attr; | |
357 | ssize_t (*show)(struct veth_port *, char *buf); | |
358 | ssize_t (*store)(struct veth_port *, const char *buf); | |
359 | }; | |
360 | ||
361 | static ssize_t veth_port_attribute_show(struct kobject *kobj, | |
362 | struct attribute *attr, char *buf) | |
363 | { | |
364 | struct veth_port_attribute *port_attr; | |
365 | struct veth_port *port; | |
366 | ||
367 | port_attr = container_of(attr, struct veth_port_attribute, attr); | |
368 | port = container_of(kobj, struct veth_port, kobject); | |
369 | ||
370 | if (!port_attr->show) | |
371 | return -EIO; | |
372 | ||
373 | return port_attr->show(port, buf); | |
374 | } | |
375 | ||
376 | #define CUSTOM_PORT_ATTR(_name, _format, _expression) \ | |
377 | static ssize_t _name##_show(struct veth_port *port, char *buf) \ | |
378 | { \ | |
379 | return sprintf(buf, _format, _expression); \ | |
380 | } \ | |
381 | struct veth_port_attribute veth_port_attr_##_name = __ATTR_RO(_name) | |
382 | ||
383 | #define SIMPLE_PORT_ATTR(_name) \ | |
384 | CUSTOM_PORT_ATTR(_name, "%lu\n", (unsigned long)port->_name) | |
385 | ||
386 | SIMPLE_PORT_ATTR(promiscuous); | |
387 | SIMPLE_PORT_ATTR(num_mcast); | |
388 | CUSTOM_PORT_ATTR(lpar_map, "0x%X\n", port->lpar_map); | |
389 | CUSTOM_PORT_ATTR(stopped_map, "0x%X\n", port->stopped_map); | |
390 | CUSTOM_PORT_ATTR(mac_addr, "0x%lX\n", port->mac_addr); | |
391 | ||
392 | #define GET_PORT_ATTR(_name) (&veth_port_attr_##_name.attr) | |
393 | static struct attribute *veth_port_default_attrs[] = { | |
394 | GET_PORT_ATTR(mac_addr), | |
395 | GET_PORT_ATTR(lpar_map), | |
396 | GET_PORT_ATTR(stopped_map), | |
397 | GET_PORT_ATTR(promiscuous), | |
398 | GET_PORT_ATTR(num_mcast), | |
399 | NULL | |
400 | }; | |
401 | ||
402 | static struct sysfs_ops veth_port_sysfs_ops = { | |
403 | .show = veth_port_attribute_show | |
404 | }; | |
405 | ||
406 | static struct kobj_type veth_port_ktype = { | |
407 | .sysfs_ops = &veth_port_sysfs_ops, | |
408 | .default_attrs = veth_port_default_attrs | |
409 | }; | |
410 | ||
1da177e4 LT |
411 | /* |
412 | * LPAR connection code | |
413 | */ | |
414 | ||
415 | static inline void veth_kick_statemachine(struct veth_lpar_connection *cnx) | |
416 | { | |
417 | schedule_work(&cnx->statemachine_wq); | |
418 | } | |
419 | ||
420 | static void veth_take_cap(struct veth_lpar_connection *cnx, | |
421 | struct VethLpEvent *event) | |
422 | { | |
423 | unsigned long flags; | |
424 | ||
425 | spin_lock_irqsave(&cnx->lock, flags); | |
426 | /* Receiving caps may mean the other end has just come up, so | |
427 | * we need to reload the instance ID of the far end */ | |
428 | cnx->dst_inst = | |
429 | HvCallEvent_getTargetLpInstanceId(cnx->remote_lp, | |
430 | HvLpEvent_Type_VirtualLan); | |
431 | ||
432 | if (cnx->state & VETH_STATE_GOTCAPS) { | |
61a3c696 | 433 | veth_error("Received a second capabilities from LPAR %d.\n", |
1da177e4 LT |
434 | cnx->remote_lp); |
435 | event->base_event.xRc = HvLpEvent_Rc_BufferNotAvailable; | |
436 | HvCallEvent_ackLpEvent((struct HvLpEvent *) event); | |
437 | } else { | |
438 | memcpy(&cnx->cap_event, event, sizeof(cnx->cap_event)); | |
439 | cnx->state |= VETH_STATE_GOTCAPS; | |
440 | veth_kick_statemachine(cnx); | |
441 | } | |
442 | spin_unlock_irqrestore(&cnx->lock, flags); | |
443 | } | |
444 | ||
445 | static void veth_take_cap_ack(struct veth_lpar_connection *cnx, | |
446 | struct VethLpEvent *event) | |
447 | { | |
448 | unsigned long flags; | |
449 | ||
450 | spin_lock_irqsave(&cnx->lock, flags); | |
451 | if (cnx->state & VETH_STATE_GOTCAPACK) { | |
61a3c696 | 452 | veth_error("Received a second capabilities ack from LPAR %d.\n", |
1da177e4 LT |
453 | cnx->remote_lp); |
454 | } else { | |
455 | memcpy(&cnx->cap_ack_event, event, | |
456 | sizeof(&cnx->cap_ack_event)); | |
457 | cnx->state |= VETH_STATE_GOTCAPACK; | |
458 | veth_kick_statemachine(cnx); | |
459 | } | |
460 | spin_unlock_irqrestore(&cnx->lock, flags); | |
461 | } | |
462 | ||
463 | static void veth_take_monitor_ack(struct veth_lpar_connection *cnx, | |
464 | struct VethLpEvent *event) | |
465 | { | |
466 | unsigned long flags; | |
467 | ||
468 | spin_lock_irqsave(&cnx->lock, flags); | |
61a3c696 | 469 | veth_debug("cnx %d: lost connection.\n", cnx->remote_lp); |
58c5900b ME |
470 | |
471 | /* Avoid kicking the statemachine once we're shutdown. | |
472 | * It's unnecessary and it could break veth_stop_connection(). */ | |
473 | ||
474 | if (! (cnx->state & VETH_STATE_SHUTDOWN)) { | |
475 | cnx->state |= VETH_STATE_RESET; | |
476 | veth_kick_statemachine(cnx); | |
477 | } | |
1da177e4 LT |
478 | spin_unlock_irqrestore(&cnx->lock, flags); |
479 | } | |
480 | ||
481 | static void veth_handle_ack(struct VethLpEvent *event) | |
482 | { | |
483 | HvLpIndex rlp = event->base_event.xTargetLp; | |
484 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; | |
485 | ||
486 | BUG_ON(! cnx); | |
487 | ||
488 | switch (event->base_event.xSubtype) { | |
489 | case VethEventTypeCap: | |
490 | veth_take_cap_ack(cnx, event); | |
491 | break; | |
492 | case VethEventTypeMonitor: | |
493 | veth_take_monitor_ack(cnx, event); | |
494 | break; | |
495 | default: | |
61a3c696 ME |
496 | veth_error("Unknown ack type %d from LPAR %d.\n", |
497 | event->base_event.xSubtype, rlp); | |
1da177e4 LT |
498 | }; |
499 | } | |
500 | ||
501 | static void veth_handle_int(struct VethLpEvent *event) | |
502 | { | |
503 | HvLpIndex rlp = event->base_event.xSourceLp; | |
504 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; | |
505 | unsigned long flags; | |
24562ffa | 506 | int i, acked = 0; |
1da177e4 LT |
507 | |
508 | BUG_ON(! cnx); | |
509 | ||
510 | switch (event->base_event.xSubtype) { | |
511 | case VethEventTypeCap: | |
512 | veth_take_cap(cnx, event); | |
513 | break; | |
514 | case VethEventTypeMonitor: | |
515 | /* do nothing... this'll hang out here til we're dead, | |
516 | * and the hypervisor will return it for us. */ | |
517 | break; | |
518 | case VethEventTypeFramesAck: | |
519 | spin_lock_irqsave(&cnx->lock, flags); | |
24562ffa | 520 | |
1da177e4 LT |
521 | for (i = 0; i < VETH_MAX_ACKS_PER_MSG; ++i) { |
522 | u16 msgnum = event->u.frames_ack_data.token[i]; | |
523 | ||
24562ffa | 524 | if (msgnum < VETH_NUMBUFFERS) { |
1da177e4 | 525 | veth_recycle_msg(cnx, cnx->msgs + msgnum); |
24562ffa ME |
526 | cnx->outstanding_tx--; |
527 | acked++; | |
528 | } | |
1da177e4 | 529 | } |
24562ffa | 530 | |
e0808494 | 531 | if (acked > 0) { |
24562ffa | 532 | cnx->last_contact = jiffies; |
e0808494 ME |
533 | veth_wake_queues(cnx); |
534 | } | |
24562ffa | 535 | |
1da177e4 | 536 | spin_unlock_irqrestore(&cnx->lock, flags); |
1da177e4 LT |
537 | break; |
538 | case VethEventTypeFrames: | |
539 | veth_receive(cnx, event); | |
540 | break; | |
541 | default: | |
61a3c696 ME |
542 | veth_error("Unknown interrupt type %d from LPAR %d.\n", |
543 | event->base_event.xSubtype, rlp); | |
1da177e4 LT |
544 | }; |
545 | } | |
546 | ||
547 | static void veth_handle_event(struct HvLpEvent *event, struct pt_regs *regs) | |
548 | { | |
549 | struct VethLpEvent *veth_event = (struct VethLpEvent *)event; | |
550 | ||
551 | if (event->xFlags.xFunction == HvLpEvent_Function_Ack) | |
552 | veth_handle_ack(veth_event); | |
553 | else if (event->xFlags.xFunction == HvLpEvent_Function_Int) | |
554 | veth_handle_int(veth_event); | |
555 | } | |
556 | ||
557 | static int veth_process_caps(struct veth_lpar_connection *cnx) | |
558 | { | |
559 | struct VethCapData *remote_caps = &cnx->remote_caps; | |
560 | int num_acks_needed; | |
561 | ||
562 | /* Convert timer to jiffies */ | |
563 | cnx->ack_timeout = remote_caps->ack_timeout * HZ / 1000000; | |
564 | ||
565 | if ( (remote_caps->num_buffers == 0) | |
566 | || (remote_caps->ack_threshold > VETH_MAX_ACKS_PER_MSG) | |
567 | || (remote_caps->ack_threshold == 0) | |
568 | || (cnx->ack_timeout == 0) ) { | |
61a3c696 ME |
569 | veth_error("Received incompatible capabilities from LPAR %d.\n", |
570 | cnx->remote_lp); | |
1da177e4 LT |
571 | return HvLpEvent_Rc_InvalidSubtypeData; |
572 | } | |
573 | ||
574 | num_acks_needed = (remote_caps->num_buffers | |
575 | / remote_caps->ack_threshold) + 1; | |
576 | ||
577 | /* FIXME: locking on num_ack_events? */ | |
578 | if (cnx->num_ack_events < num_acks_needed) { | |
579 | int num; | |
580 | ||
581 | num = veth_allocate_events(cnx->remote_lp, | |
582 | num_acks_needed-cnx->num_ack_events); | |
583 | if (num > 0) | |
584 | cnx->num_ack_events += num; | |
585 | ||
586 | if (cnx->num_ack_events < num_acks_needed) { | |
61a3c696 ME |
587 | veth_error("Couldn't allocate enough ack events " |
588 | "for LPAR %d.\n", cnx->remote_lp); | |
1da177e4 LT |
589 | |
590 | return HvLpEvent_Rc_BufferNotAvailable; | |
591 | } | |
592 | } | |
593 | ||
594 | ||
595 | return HvLpEvent_Rc_Good; | |
596 | } | |
597 | ||
598 | /* FIXME: The gotos here are a bit dubious */ | |
599 | static void veth_statemachine(void *p) | |
600 | { | |
601 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)p; | |
602 | int rlp = cnx->remote_lp; | |
603 | int rc; | |
604 | ||
605 | spin_lock_irq(&cnx->lock); | |
606 | ||
607 | restart: | |
608 | if (cnx->state & VETH_STATE_RESET) { | |
1da177e4 LT |
609 | if (cnx->state & VETH_STATE_OPEN) |
610 | HvCallEvent_closeLpEventPath(cnx->remote_lp, | |
611 | HvLpEvent_Type_VirtualLan); | |
612 | ||
abfda471 ME |
613 | /* |
614 | * Reset ack data. This prevents the ack_timer actually | |
615 | * doing anything, even if it runs one more time when | |
616 | * we drop the lock below. | |
617 | */ | |
1da177e4 LT |
618 | memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks)); |
619 | cnx->num_pending_acks = 0; | |
620 | ||
621 | cnx->state &= ~(VETH_STATE_RESET | VETH_STATE_SENTMON | |
622 | | VETH_STATE_OPEN | VETH_STATE_SENTCAPS | |
623 | | VETH_STATE_GOTCAPACK | VETH_STATE_GOTCAPS | |
624 | | VETH_STATE_SENTCAPACK | VETH_STATE_READY); | |
625 | ||
626 | /* Clean up any leftover messages */ | |
24562ffa ME |
627 | if (cnx->msgs) { |
628 | int i; | |
1da177e4 LT |
629 | for (i = 0; i < VETH_NUMBUFFERS; ++i) |
630 | veth_recycle_msg(cnx, cnx->msgs + i); | |
24562ffa | 631 | } |
e0808494 | 632 | |
24562ffa | 633 | cnx->outstanding_tx = 0; |
e0808494 | 634 | veth_wake_queues(cnx); |
abfda471 ME |
635 | |
636 | /* Drop the lock so we can do stuff that might sleep or | |
637 | * take other locks. */ | |
1da177e4 | 638 | spin_unlock_irq(&cnx->lock); |
abfda471 ME |
639 | |
640 | del_timer_sync(&cnx->ack_timer); | |
24562ffa ME |
641 | del_timer_sync(&cnx->reset_timer); |
642 | ||
1da177e4 | 643 | spin_lock_irq(&cnx->lock); |
abfda471 | 644 | |
1da177e4 LT |
645 | if (cnx->state & VETH_STATE_RESET) |
646 | goto restart; | |
58c5900b ME |
647 | |
648 | /* Hack, wait for the other end to reset itself. */ | |
649 | if (! (cnx->state & VETH_STATE_SHUTDOWN)) { | |
650 | schedule_delayed_work(&cnx->statemachine_wq, 5 * HZ); | |
651 | goto out; | |
652 | } | |
1da177e4 LT |
653 | } |
654 | ||
655 | if (cnx->state & VETH_STATE_SHUTDOWN) | |
656 | /* It's all over, do nothing */ | |
657 | goto out; | |
658 | ||
659 | if ( !(cnx->state & VETH_STATE_OPEN) ) { | |
660 | if (! cnx->msgs || (cnx->num_events < (2 + VETH_NUMBUFFERS)) ) | |
661 | goto cant_cope; | |
662 | ||
663 | HvCallEvent_openLpEventPath(rlp, HvLpEvent_Type_VirtualLan); | |
664 | cnx->src_inst = | |
665 | HvCallEvent_getSourceLpInstanceId(rlp, | |
666 | HvLpEvent_Type_VirtualLan); | |
667 | cnx->dst_inst = | |
668 | HvCallEvent_getTargetLpInstanceId(rlp, | |
669 | HvLpEvent_Type_VirtualLan); | |
670 | cnx->state |= VETH_STATE_OPEN; | |
671 | } | |
672 | ||
673 | if ( (cnx->state & VETH_STATE_OPEN) | |
674 | && !(cnx->state & VETH_STATE_SENTMON) ) { | |
675 | rc = veth_signalevent(cnx, VethEventTypeMonitor, | |
676 | HvLpEvent_AckInd_DoAck, | |
677 | HvLpEvent_AckType_DeferredAck, | |
678 | 0, 0, 0, 0, 0, 0); | |
679 | ||
680 | if (rc == HvLpEvent_Rc_Good) { | |
681 | cnx->state |= VETH_STATE_SENTMON; | |
682 | } else { | |
683 | if ( (rc != HvLpEvent_Rc_PartitionDead) | |
684 | && (rc != HvLpEvent_Rc_PathClosed) ) | |
61a3c696 ME |
685 | veth_error("Error sending monitor to LPAR %d, " |
686 | "rc = %d\n", rlp, rc); | |
1da177e4 LT |
687 | |
688 | /* Oh well, hope we get a cap from the other | |
689 | * end and do better when that kicks us */ | |
690 | goto out; | |
691 | } | |
692 | } | |
693 | ||
694 | if ( (cnx->state & VETH_STATE_OPEN) | |
695 | && !(cnx->state & VETH_STATE_SENTCAPS)) { | |
696 | u64 *rawcap = (u64 *)&cnx->local_caps; | |
697 | ||
698 | rc = veth_signalevent(cnx, VethEventTypeCap, | |
699 | HvLpEvent_AckInd_DoAck, | |
700 | HvLpEvent_AckType_ImmediateAck, | |
701 | 0, rawcap[0], rawcap[1], rawcap[2], | |
702 | rawcap[3], rawcap[4]); | |
703 | ||
704 | if (rc == HvLpEvent_Rc_Good) { | |
705 | cnx->state |= VETH_STATE_SENTCAPS; | |
706 | } else { | |
707 | if ( (rc != HvLpEvent_Rc_PartitionDead) | |
708 | && (rc != HvLpEvent_Rc_PathClosed) ) | |
61a3c696 ME |
709 | veth_error("Error sending caps to LPAR %d, " |
710 | "rc = %d\n", rlp, rc); | |
711 | ||
1da177e4 LT |
712 | /* Oh well, hope we get a cap from the other |
713 | * end and do better when that kicks us */ | |
714 | goto out; | |
715 | } | |
716 | } | |
717 | ||
718 | if ((cnx->state & VETH_STATE_GOTCAPS) | |
719 | && !(cnx->state & VETH_STATE_SENTCAPACK)) { | |
720 | struct VethCapData *remote_caps = &cnx->remote_caps; | |
721 | ||
722 | memcpy(remote_caps, &cnx->cap_event.u.caps_data, | |
723 | sizeof(*remote_caps)); | |
724 | ||
725 | spin_unlock_irq(&cnx->lock); | |
726 | rc = veth_process_caps(cnx); | |
727 | spin_lock_irq(&cnx->lock); | |
728 | ||
729 | /* We dropped the lock, so recheck for anything which | |
730 | * might mess us up */ | |
731 | if (cnx->state & (VETH_STATE_RESET|VETH_STATE_SHUTDOWN)) | |
732 | goto restart; | |
733 | ||
734 | cnx->cap_event.base_event.xRc = rc; | |
735 | HvCallEvent_ackLpEvent((struct HvLpEvent *)&cnx->cap_event); | |
736 | if (rc == HvLpEvent_Rc_Good) | |
737 | cnx->state |= VETH_STATE_SENTCAPACK; | |
738 | else | |
739 | goto cant_cope; | |
740 | } | |
741 | ||
742 | if ((cnx->state & VETH_STATE_GOTCAPACK) | |
743 | && (cnx->state & VETH_STATE_GOTCAPS) | |
744 | && !(cnx->state & VETH_STATE_READY)) { | |
745 | if (cnx->cap_ack_event.base_event.xRc == HvLpEvent_Rc_Good) { | |
746 | /* Start the ACK timer */ | |
747 | cnx->ack_timer.expires = jiffies + cnx->ack_timeout; | |
748 | add_timer(&cnx->ack_timer); | |
749 | cnx->state |= VETH_STATE_READY; | |
750 | } else { | |
61a3c696 ME |
751 | veth_error("Caps rejected by LPAR %d, rc = %d\n", |
752 | rlp, cnx->cap_ack_event.base_event.xRc); | |
1da177e4 LT |
753 | goto cant_cope; |
754 | } | |
755 | } | |
756 | ||
757 | out: | |
758 | spin_unlock_irq(&cnx->lock); | |
759 | return; | |
760 | ||
761 | cant_cope: | |
762 | /* FIXME: we get here if something happens we really can't | |
763 | * cope with. The link will never work once we get here, and | |
764 | * all we can do is not lock the rest of the system up */ | |
61a3c696 ME |
765 | veth_error("Unrecoverable error on connection to LPAR %d, shutting down" |
766 | " (state = 0x%04lx)\n", rlp, cnx->state); | |
1da177e4 LT |
767 | cnx->state |= VETH_STATE_SHUTDOWN; |
768 | spin_unlock_irq(&cnx->lock); | |
769 | } | |
770 | ||
771 | static int veth_init_connection(u8 rlp) | |
772 | { | |
773 | struct veth_lpar_connection *cnx; | |
774 | struct veth_msg *msgs; | |
f0c129ca | 775 | int i, rc; |
1da177e4 LT |
776 | |
777 | if ( (rlp == this_lp) | |
778 | || ! HvLpConfig_doLpsCommunicateOnVirtualLan(this_lp, rlp) ) | |
779 | return 0; | |
780 | ||
781 | cnx = kmalloc(sizeof(*cnx), GFP_KERNEL); | |
782 | if (! cnx) | |
783 | return -ENOMEM; | |
784 | memset(cnx, 0, sizeof(*cnx)); | |
785 | ||
786 | cnx->remote_lp = rlp; | |
787 | spin_lock_init(&cnx->lock); | |
788 | INIT_WORK(&cnx->statemachine_wq, veth_statemachine, cnx); | |
24562ffa | 789 | |
1da177e4 LT |
790 | init_timer(&cnx->ack_timer); |
791 | cnx->ack_timer.function = veth_timed_ack; | |
792 | cnx->ack_timer.data = (unsigned long) cnx; | |
24562ffa ME |
793 | |
794 | init_timer(&cnx->reset_timer); | |
795 | cnx->reset_timer.function = veth_timed_reset; | |
796 | cnx->reset_timer.data = (unsigned long) cnx; | |
797 | cnx->reset_timeout = 5 * HZ * (VETH_ACKTIMEOUT / 1000000); | |
798 | ||
1da177e4 LT |
799 | memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks)); |
800 | ||
801 | veth_cnx[rlp] = cnx; | |
802 | ||
f0c129ca ME |
803 | /* This gets us 1 reference, which is held on behalf of the driver |
804 | * infrastructure. It's released at module unload. */ | |
805 | kobject_init(&cnx->kobject); | |
806 | cnx->kobject.ktype = &veth_lpar_connection_ktype; | |
807 | rc = kobject_set_name(&cnx->kobject, "cnx%.2d", rlp); | |
808 | if (rc != 0) | |
809 | return rc; | |
810 | ||
1da177e4 LT |
811 | msgs = kmalloc(VETH_NUMBUFFERS * sizeof(struct veth_msg), GFP_KERNEL); |
812 | if (! msgs) { | |
61a3c696 | 813 | veth_error("Can't allocate buffers for LPAR %d.\n", rlp); |
1da177e4 LT |
814 | return -ENOMEM; |
815 | } | |
816 | ||
817 | cnx->msgs = msgs; | |
818 | memset(msgs, 0, VETH_NUMBUFFERS * sizeof(struct veth_msg)); | |
1da177e4 LT |
819 | |
820 | for (i = 0; i < VETH_NUMBUFFERS; i++) { | |
821 | msgs[i].token = i; | |
822 | veth_stack_push(cnx, msgs + i); | |
823 | } | |
824 | ||
825 | cnx->num_events = veth_allocate_events(rlp, 2 + VETH_NUMBUFFERS); | |
826 | ||
827 | if (cnx->num_events < (2 + VETH_NUMBUFFERS)) { | |
61a3c696 | 828 | veth_error("Can't allocate enough events for LPAR %d.\n", rlp); |
1da177e4 LT |
829 | return -ENOMEM; |
830 | } | |
831 | ||
832 | cnx->local_caps.num_buffers = VETH_NUMBUFFERS; | |
833 | cnx->local_caps.ack_threshold = ACK_THRESHOLD; | |
834 | cnx->local_caps.ack_timeout = VETH_ACKTIMEOUT; | |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
f0c129ca | 839 | static void veth_stop_connection(struct veth_lpar_connection *cnx) |
1da177e4 | 840 | { |
f0c129ca | 841 | if (!cnx) |
1da177e4 LT |
842 | return; |
843 | ||
844 | spin_lock_irq(&cnx->lock); | |
845 | cnx->state |= VETH_STATE_RESET | VETH_STATE_SHUTDOWN; | |
846 | veth_kick_statemachine(cnx); | |
847 | spin_unlock_irq(&cnx->lock); | |
848 | ||
58c5900b ME |
849 | /* There's a slim chance the reset code has just queued the |
850 | * statemachine to run in five seconds. If so we need to cancel | |
851 | * that and requeue the work to run now. */ | |
852 | if (cancel_delayed_work(&cnx->statemachine_wq)) { | |
853 | spin_lock_irq(&cnx->lock); | |
854 | veth_kick_statemachine(cnx); | |
855 | spin_unlock_irq(&cnx->lock); | |
856 | } | |
857 | ||
abfda471 | 858 | /* Wait for the state machine to run. */ |
1da177e4 | 859 | flush_scheduled_work(); |
ec60beeb ME |
860 | } |
861 | ||
f0c129ca | 862 | static void veth_destroy_connection(struct veth_lpar_connection *cnx) |
ec60beeb | 863 | { |
f0c129ca | 864 | if (!cnx) |
ec60beeb | 865 | return; |
1da177e4 | 866 | |
1da177e4 LT |
867 | if (cnx->num_events > 0) |
868 | mf_deallocate_lp_events(cnx->remote_lp, | |
869 | HvLpEvent_Type_VirtualLan, | |
870 | cnx->num_events, | |
871 | NULL, NULL); | |
872 | if (cnx->num_ack_events > 0) | |
873 | mf_deallocate_lp_events(cnx->remote_lp, | |
874 | HvLpEvent_Type_VirtualLan, | |
875 | cnx->num_ack_events, | |
876 | NULL, NULL); | |
1da177e4 LT |
877 | |
878 | kfree(cnx->msgs); | |
f0c129ca | 879 | veth_cnx[cnx->remote_lp] = NULL; |
1da177e4 | 880 | kfree(cnx); |
f0c129ca ME |
881 | } |
882 | ||
883 | static void veth_release_connection(struct kobject *kobj) | |
884 | { | |
885 | struct veth_lpar_connection *cnx; | |
886 | cnx = container_of(kobj, struct veth_lpar_connection, kobject); | |
887 | veth_stop_connection(cnx); | |
888 | veth_destroy_connection(cnx); | |
1da177e4 LT |
889 | } |
890 | ||
891 | /* | |
892 | * net_device code | |
893 | */ | |
894 | ||
895 | static int veth_open(struct net_device *dev) | |
896 | { | |
897 | struct veth_port *port = (struct veth_port *) dev->priv; | |
898 | ||
899 | memset(&port->stats, 0, sizeof (port->stats)); | |
900 | netif_start_queue(dev); | |
901 | return 0; | |
902 | } | |
903 | ||
904 | static int veth_close(struct net_device *dev) | |
905 | { | |
906 | netif_stop_queue(dev); | |
907 | return 0; | |
908 | } | |
909 | ||
910 | static struct net_device_stats *veth_get_stats(struct net_device *dev) | |
911 | { | |
912 | struct veth_port *port = (struct veth_port *) dev->priv; | |
913 | ||
914 | return &port->stats; | |
915 | } | |
916 | ||
917 | static int veth_change_mtu(struct net_device *dev, int new_mtu) | |
918 | { | |
919 | if ((new_mtu < 68) || (new_mtu > VETH_MAX_MTU)) | |
920 | return -EINVAL; | |
921 | dev->mtu = new_mtu; | |
922 | return 0; | |
923 | } | |
924 | ||
925 | static void veth_set_multicast_list(struct net_device *dev) | |
926 | { | |
927 | struct veth_port *port = (struct veth_port *) dev->priv; | |
928 | unsigned long flags; | |
929 | ||
930 | write_lock_irqsave(&port->mcast_gate, flags); | |
931 | ||
2a5391a1 ME |
932 | if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) || |
933 | (dev->mc_count > VETH_MAX_MCAST)) { | |
1da177e4 | 934 | port->promiscuous = 1; |
1da177e4 LT |
935 | } else { |
936 | struct dev_mc_list *dmi = dev->mc_list; | |
937 | int i; | |
938 | ||
2a5391a1 ME |
939 | port->promiscuous = 0; |
940 | ||
1da177e4 LT |
941 | /* Update table */ |
942 | port->num_mcast = 0; | |
943 | ||
944 | for (i = 0; i < dev->mc_count; i++) { | |
945 | u8 *addr = dmi->dmi_addr; | |
946 | u64 xaddr = 0; | |
947 | ||
948 | if (addr[0] & 0x01) {/* multicast address? */ | |
949 | memcpy(&xaddr, addr, ETH_ALEN); | |
950 | port->mcast_addr[port->num_mcast] = xaddr; | |
951 | port->num_mcast++; | |
952 | } | |
953 | dmi = dmi->next; | |
954 | } | |
955 | } | |
956 | ||
957 | write_unlock_irqrestore(&port->mcast_gate, flags); | |
958 | } | |
959 | ||
960 | static void veth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
961 | { | |
962 | strncpy(info->driver, "veth", sizeof(info->driver) - 1); | |
963 | info->driver[sizeof(info->driver) - 1] = '\0'; | |
964 | strncpy(info->version, "1.0", sizeof(info->version) - 1); | |
965 | } | |
966 | ||
967 | static int veth_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) | |
968 | { | |
969 | ecmd->supported = (SUPPORTED_1000baseT_Full | |
970 | | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
971 | ecmd->advertising = (SUPPORTED_1000baseT_Full | |
972 | | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
973 | ecmd->port = PORT_FIBRE; | |
974 | ecmd->transceiver = XCVR_INTERNAL; | |
975 | ecmd->phy_address = 0; | |
976 | ecmd->speed = SPEED_1000; | |
977 | ecmd->duplex = DUPLEX_FULL; | |
978 | ecmd->autoneg = AUTONEG_ENABLE; | |
979 | ecmd->maxtxpkt = 120; | |
980 | ecmd->maxrxpkt = 120; | |
981 | return 0; | |
982 | } | |
983 | ||
984 | static u32 veth_get_link(struct net_device *dev) | |
985 | { | |
986 | return 1; | |
987 | } | |
988 | ||
989 | static struct ethtool_ops ops = { | |
990 | .get_drvinfo = veth_get_drvinfo, | |
991 | .get_settings = veth_get_settings, | |
992 | .get_link = veth_get_link, | |
993 | }; | |
994 | ||
1da177e4 LT |
995 | static struct net_device * __init veth_probe_one(int vlan, struct device *vdev) |
996 | { | |
997 | struct net_device *dev; | |
998 | struct veth_port *port; | |
999 | int i, rc; | |
1000 | ||
1001 | dev = alloc_etherdev(sizeof (struct veth_port)); | |
1002 | if (! dev) { | |
1003 | veth_error("Unable to allocate net_device structure!\n"); | |
1004 | return NULL; | |
1005 | } | |
1006 | ||
1007 | port = (struct veth_port *) dev->priv; | |
1008 | ||
e0808494 | 1009 | spin_lock_init(&port->queue_lock); |
1da177e4 | 1010 | rwlock_init(&port->mcast_gate); |
e0808494 | 1011 | port->stopped_map = 0; |
1da177e4 LT |
1012 | |
1013 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1014 | HvLpVirtualLanIndexMap map; | |
1015 | ||
1016 | if (i == this_lp) | |
1017 | continue; | |
1018 | map = HvLpConfig_getVirtualLanIndexMapForLp(i); | |
1019 | if (map & (0x8000 >> vlan)) | |
1020 | port->lpar_map |= (1 << i); | |
1021 | } | |
1022 | port->dev = vdev; | |
1023 | ||
1024 | dev->dev_addr[0] = 0x02; | |
1025 | dev->dev_addr[1] = 0x01; | |
1026 | dev->dev_addr[2] = 0xff; | |
1027 | dev->dev_addr[3] = vlan; | |
1028 | dev->dev_addr[4] = 0xff; | |
1029 | dev->dev_addr[5] = this_lp; | |
1030 | ||
1031 | dev->mtu = VETH_MAX_MTU; | |
1032 | ||
1033 | memcpy(&port->mac_addr, dev->dev_addr, 6); | |
1034 | ||
1035 | dev->open = veth_open; | |
1036 | dev->hard_start_xmit = veth_start_xmit; | |
1037 | dev->stop = veth_close; | |
1038 | dev->get_stats = veth_get_stats; | |
1039 | dev->change_mtu = veth_change_mtu; | |
1040 | dev->set_mac_address = NULL; | |
1041 | dev->set_multicast_list = veth_set_multicast_list; | |
1042 | SET_ETHTOOL_OPS(dev, &ops); | |
1043 | ||
1da177e4 LT |
1044 | SET_NETDEV_DEV(dev, vdev); |
1045 | ||
1046 | rc = register_netdev(dev); | |
1047 | if (rc != 0) { | |
61a3c696 | 1048 | veth_error("Failed registering net device for vlan%d.\n", vlan); |
1da177e4 LT |
1049 | free_netdev(dev); |
1050 | return NULL; | |
1051 | } | |
1052 | ||
07a5c172 ME |
1053 | kobject_init(&port->kobject); |
1054 | port->kobject.parent = &dev->class_dev.kobj; | |
1055 | port->kobject.ktype = &veth_port_ktype; | |
1056 | kobject_set_name(&port->kobject, "veth_port"); | |
1057 | if (0 != kobject_add(&port->kobject)) | |
1058 | veth_error("Failed adding port for %s to sysfs.\n", dev->name); | |
1059 | ||
61a3c696 ME |
1060 | veth_info("%s attached to iSeries vlan %d (LPAR map = 0x%.4X)\n", |
1061 | dev->name, vlan, port->lpar_map); | |
1da177e4 LT |
1062 | |
1063 | return dev; | |
1064 | } | |
1065 | ||
1066 | /* | |
1067 | * Tx path | |
1068 | */ | |
1069 | ||
1070 | static int veth_transmit_to_one(struct sk_buff *skb, HvLpIndex rlp, | |
1071 | struct net_device *dev) | |
1072 | { | |
1073 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; | |
1074 | struct veth_port *port = (struct veth_port *) dev->priv; | |
1075 | HvLpEvent_Rc rc; | |
1da177e4 | 1076 | struct veth_msg *msg = NULL; |
1da177e4 LT |
1077 | unsigned long flags; |
1078 | ||
db5e8718 | 1079 | if (! cnx) |
1da177e4 | 1080 | return 0; |
1da177e4 LT |
1081 | |
1082 | spin_lock_irqsave(&cnx->lock, flags); | |
1083 | ||
f27eff1f | 1084 | if (! (cnx->state & VETH_STATE_READY)) |
db5e8718 | 1085 | goto no_error; |
1da177e4 | 1086 | |
db5e8718 | 1087 | if ((skb->len - ETH_HLEN) > VETH_MAX_MTU) |
1da177e4 LT |
1088 | goto drop; |
1089 | ||
1090 | msg = veth_stack_pop(cnx); | |
db5e8718 | 1091 | if (! msg) |
1da177e4 | 1092 | goto drop; |
1da177e4 | 1093 | |
b08bd5c0 | 1094 | msg->in_use = 1; |
db5e8718 | 1095 | msg->skb = skb_get(skb); |
b08bd5c0 | 1096 | |
cbf9074c ME |
1097 | msg->data.addr[0] = dma_map_single(port->dev, skb->data, |
1098 | skb->len, DMA_TO_DEVICE); | |
1da177e4 | 1099 | |
cbf9074c | 1100 | if (dma_mapping_error(msg->data.addr[0])) |
1da177e4 LT |
1101 | goto recycle_and_drop; |
1102 | ||
1da177e4 | 1103 | msg->dev = port->dev; |
cbf9074c | 1104 | msg->data.len[0] = skb->len; |
1da177e4 | 1105 | msg->data.eofmask = 1 << VETH_EOF_SHIFT; |
cbf9074c | 1106 | |
1da177e4 LT |
1107 | rc = veth_signaldata(cnx, VethEventTypeFrames, msg->token, &msg->data); |
1108 | ||
1109 | if (rc != HvLpEvent_Rc_Good) | |
1110 | goto recycle_and_drop; | |
1111 | ||
24562ffa ME |
1112 | /* If the timer's not already running, start it now. */ |
1113 | if (0 == cnx->outstanding_tx) | |
1114 | mod_timer(&cnx->reset_timer, jiffies + cnx->reset_timeout); | |
1115 | ||
1116 | cnx->last_contact = jiffies; | |
1117 | cnx->outstanding_tx++; | |
1118 | ||
e0808494 ME |
1119 | if (veth_stack_is_empty(cnx)) |
1120 | veth_stop_queues(cnx); | |
1121 | ||
db5e8718 | 1122 | no_error: |
1da177e4 LT |
1123 | spin_unlock_irqrestore(&cnx->lock, flags); |
1124 | return 0; | |
1125 | ||
1126 | recycle_and_drop: | |
1da177e4 LT |
1127 | veth_recycle_msg(cnx, msg); |
1128 | drop: | |
1da177e4 | 1129 | spin_unlock_irqrestore(&cnx->lock, flags); |
db5e8718 | 1130 | return 1; |
1da177e4 LT |
1131 | } |
1132 | ||
db5e8718 | 1133 | static void veth_transmit_to_many(struct sk_buff *skb, |
1da177e4 LT |
1134 | HvLpIndexMap lpmask, |
1135 | struct net_device *dev) | |
1136 | { | |
1137 | struct veth_port *port = (struct veth_port *) dev->priv; | |
db5e8718 ME |
1138 | int i, success, error; |
1139 | ||
1140 | success = error = 0; | |
1da177e4 LT |
1141 | |
1142 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1143 | if ((lpmask & (1 << i)) == 0) | |
1144 | continue; | |
1145 | ||
db5e8718 ME |
1146 | if (veth_transmit_to_one(skb, i, dev)) |
1147 | error = 1; | |
1148 | else | |
1149 | success = 1; | |
1da177e4 LT |
1150 | } |
1151 | ||
db5e8718 ME |
1152 | if (error) |
1153 | port->stats.tx_errors++; | |
1154 | ||
1155 | if (success) { | |
1da177e4 LT |
1156 | port->stats.tx_packets++; |
1157 | port->stats.tx_bytes += skb->len; | |
1158 | } | |
1da177e4 LT |
1159 | } |
1160 | ||
1161 | static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1162 | { | |
1163 | unsigned char *frame = skb->data; | |
1164 | struct veth_port *port = (struct veth_port *) dev->priv; | |
1da177e4 LT |
1165 | HvLpIndexMap lpmask; |
1166 | ||
1167 | if (! (frame[0] & 0x01)) { | |
1168 | /* unicast packet */ | |
1169 | HvLpIndex rlp = frame[5]; | |
1170 | ||
1171 | if ( ! ((1 << rlp) & port->lpar_map) ) { | |
1172 | dev_kfree_skb(skb); | |
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | lpmask = 1 << rlp; | |
1177 | } else { | |
1178 | lpmask = port->lpar_map; | |
1179 | } | |
1180 | ||
e0808494 | 1181 | veth_transmit_to_many(skb, lpmask, dev); |
1da177e4 | 1182 | |
e0808494 | 1183 | dev_kfree_skb(skb); |
1da177e4 LT |
1184 | |
1185 | return 0; | |
1186 | } | |
1187 | ||
b08bd5c0 | 1188 | /* You must hold the connection's lock when you call this function. */ |
1da177e4 LT |
1189 | static void veth_recycle_msg(struct veth_lpar_connection *cnx, |
1190 | struct veth_msg *msg) | |
1191 | { | |
1192 | u32 dma_address, dma_length; | |
1193 | ||
b08bd5c0 ME |
1194 | if (msg->in_use) { |
1195 | msg->in_use = 0; | |
1da177e4 LT |
1196 | dma_address = msg->data.addr[0]; |
1197 | dma_length = msg->data.len[0]; | |
1198 | ||
cbf9074c ME |
1199 | if (!dma_mapping_error(dma_address)) |
1200 | dma_unmap_single(msg->dev, dma_address, dma_length, | |
1201 | DMA_TO_DEVICE); | |
1da177e4 LT |
1202 | |
1203 | if (msg->skb) { | |
1204 | dev_kfree_skb_any(msg->skb); | |
1205 | msg->skb = NULL; | |
1206 | } | |
1207 | ||
1208 | memset(&msg->data, 0, sizeof(msg->data)); | |
1209 | veth_stack_push(cnx, msg); | |
61a3c696 ME |
1210 | } else if (cnx->state & VETH_STATE_OPEN) { |
1211 | veth_error("Non-pending frame (# %d) acked by LPAR %d.\n", | |
1212 | cnx->remote_lp, msg->token); | |
1213 | } | |
1da177e4 LT |
1214 | } |
1215 | ||
e0808494 | 1216 | static void veth_wake_queues(struct veth_lpar_connection *cnx) |
1da177e4 LT |
1217 | { |
1218 | int i; | |
e0808494 | 1219 | |
1da177e4 LT |
1220 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) { |
1221 | struct net_device *dev = veth_dev[i]; | |
1222 | struct veth_port *port; | |
1223 | unsigned long flags; | |
1224 | ||
1225 | if (! dev) | |
1226 | continue; | |
1227 | ||
1228 | port = (struct veth_port *)dev->priv; | |
1229 | ||
1230 | if (! (port->lpar_map & (1<<cnx->remote_lp))) | |
1231 | continue; | |
1232 | ||
e0808494 ME |
1233 | spin_lock_irqsave(&port->queue_lock, flags); |
1234 | ||
1235 | port->stopped_map &= ~(1 << cnx->remote_lp); | |
1236 | ||
1237 | if (0 == port->stopped_map && netif_queue_stopped(dev)) { | |
1238 | veth_debug("cnx %d: woke queue for %s.\n", | |
1239 | cnx->remote_lp, dev->name); | |
1240 | netif_wake_queue(dev); | |
1da177e4 | 1241 | } |
e0808494 ME |
1242 | spin_unlock_irqrestore(&port->queue_lock, flags); |
1243 | } | |
1244 | } | |
1245 | ||
1246 | static void veth_stop_queues(struct veth_lpar_connection *cnx) | |
1247 | { | |
1248 | int i; | |
1249 | ||
1250 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) { | |
1251 | struct net_device *dev = veth_dev[i]; | |
1252 | struct veth_port *port; | |
1253 | ||
1254 | if (! dev) | |
1255 | continue; | |
1256 | ||
1257 | port = (struct veth_port *)dev->priv; | |
1258 | ||
1259 | /* If this cnx is not on the vlan for this port, continue */ | |
1260 | if (! (port->lpar_map & (1 << cnx->remote_lp))) | |
1261 | continue; | |
1262 | ||
1263 | spin_lock(&port->queue_lock); | |
1264 | ||
1265 | netif_stop_queue(dev); | |
1266 | port->stopped_map |= (1 << cnx->remote_lp); | |
1267 | ||
1268 | veth_debug("cnx %d: stopped queue for %s, map = 0x%x.\n", | |
1269 | cnx->remote_lp, dev->name, port->stopped_map); | |
1270 | ||
1271 | spin_unlock(&port->queue_lock); | |
1da177e4 LT |
1272 | } |
1273 | } | |
1274 | ||
24562ffa ME |
1275 | static void veth_timed_reset(unsigned long ptr) |
1276 | { | |
1277 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)ptr; | |
1278 | unsigned long trigger_time, flags; | |
1279 | ||
1280 | /* FIXME is it possible this fires after veth_stop_connection()? | |
1281 | * That would reschedule the statemachine for 5 seconds and probably | |
1282 | * execute it after the module's been unloaded. Hmm. */ | |
1283 | ||
1284 | spin_lock_irqsave(&cnx->lock, flags); | |
1285 | ||
1286 | if (cnx->outstanding_tx > 0) { | |
1287 | trigger_time = cnx->last_contact + cnx->reset_timeout; | |
1288 | ||
1289 | if (trigger_time < jiffies) { | |
1290 | cnx->state |= VETH_STATE_RESET; | |
1291 | veth_kick_statemachine(cnx); | |
1292 | veth_error("%d packets not acked by LPAR %d within %d " | |
1293 | "seconds, resetting.\n", | |
1294 | cnx->outstanding_tx, cnx->remote_lp, | |
1295 | cnx->reset_timeout / HZ); | |
1296 | } else { | |
1297 | /* Reschedule the timer */ | |
1298 | trigger_time = jiffies + cnx->reset_timeout; | |
1299 | mod_timer(&cnx->reset_timer, trigger_time); | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | spin_unlock_irqrestore(&cnx->lock, flags); | |
1304 | } | |
1305 | ||
1da177e4 LT |
1306 | /* |
1307 | * Rx path | |
1308 | */ | |
1309 | ||
1310 | static inline int veth_frame_wanted(struct veth_port *port, u64 mac_addr) | |
1311 | { | |
1312 | int wanted = 0; | |
1313 | int i; | |
1314 | unsigned long flags; | |
1315 | ||
1316 | if ( (mac_addr == port->mac_addr) || (mac_addr == 0xffffffffffff0000) ) | |
1317 | return 1; | |
1318 | ||
1da177e4 LT |
1319 | read_lock_irqsave(&port->mcast_gate, flags); |
1320 | ||
2a5391a1 | 1321 | if (port->promiscuous) { |
1da177e4 LT |
1322 | wanted = 1; |
1323 | goto out; | |
1324 | } | |
1325 | ||
1326 | for (i = 0; i < port->num_mcast; ++i) { | |
1327 | if (port->mcast_addr[i] == mac_addr) { | |
1328 | wanted = 1; | |
1329 | break; | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | out: | |
1334 | read_unlock_irqrestore(&port->mcast_gate, flags); | |
1335 | ||
1336 | return wanted; | |
1337 | } | |
1338 | ||
1339 | struct dma_chunk { | |
1340 | u64 addr; | |
1341 | u64 size; | |
1342 | }; | |
1343 | ||
1344 | #define VETH_MAX_PAGES_PER_FRAME ( (VETH_MAX_MTU+PAGE_SIZE-2)/PAGE_SIZE + 1 ) | |
1345 | ||
1346 | static inline void veth_build_dma_list(struct dma_chunk *list, | |
1347 | unsigned char *p, unsigned long length) | |
1348 | { | |
1349 | unsigned long done; | |
1350 | int i = 1; | |
1351 | ||
1352 | /* FIXME: skbs are continguous in real addresses. Do we | |
1353 | * really need to break it into PAGE_SIZE chunks, or can we do | |
1354 | * it just at the granularity of iSeries real->absolute | |
1355 | * mapping? Indeed, given the way the allocator works, can we | |
1356 | * count on them being absolutely contiguous? */ | |
1357 | list[0].addr = ISERIES_HV_ADDR(p); | |
1358 | list[0].size = min(length, | |
1359 | PAGE_SIZE - ((unsigned long)p & ~PAGE_MASK)); | |
1360 | ||
1361 | done = list[0].size; | |
1362 | while (done < length) { | |
1363 | list[i].addr = ISERIES_HV_ADDR(p + done); | |
1364 | list[i].size = min(length-done, PAGE_SIZE); | |
1365 | done += list[i].size; | |
1366 | i++; | |
1367 | } | |
1368 | } | |
1369 | ||
1370 | static void veth_flush_acks(struct veth_lpar_connection *cnx) | |
1371 | { | |
1372 | HvLpEvent_Rc rc; | |
1373 | ||
1374 | rc = veth_signaldata(cnx, VethEventTypeFramesAck, | |
1375 | 0, &cnx->pending_acks); | |
1376 | ||
1377 | if (rc != HvLpEvent_Rc_Good) | |
61a3c696 ME |
1378 | veth_error("Failed acking frames from LPAR %d, rc = %d\n", |
1379 | cnx->remote_lp, (int)rc); | |
1da177e4 LT |
1380 | |
1381 | cnx->num_pending_acks = 0; | |
1382 | memset(&cnx->pending_acks, 0xff, sizeof(cnx->pending_acks)); | |
1383 | } | |
1384 | ||
1385 | static void veth_receive(struct veth_lpar_connection *cnx, | |
1386 | struct VethLpEvent *event) | |
1387 | { | |
1388 | struct VethFramesData *senddata = &event->u.frames_data; | |
1389 | int startchunk = 0; | |
1390 | int nchunks; | |
1391 | unsigned long flags; | |
1392 | HvLpDma_Rc rc; | |
1393 | ||
1394 | do { | |
1395 | u16 length = 0; | |
1396 | struct sk_buff *skb; | |
1397 | struct dma_chunk local_list[VETH_MAX_PAGES_PER_FRAME]; | |
1398 | struct dma_chunk remote_list[VETH_MAX_FRAMES_PER_MSG]; | |
1399 | u64 dest; | |
1400 | HvLpVirtualLanIndex vlan; | |
1401 | struct net_device *dev; | |
1402 | struct veth_port *port; | |
1403 | ||
1404 | /* FIXME: do we need this? */ | |
1405 | memset(local_list, 0, sizeof(local_list)); | |
1406 | memset(remote_list, 0, sizeof(VETH_MAX_FRAMES_PER_MSG)); | |
1407 | ||
1408 | /* a 0 address marks the end of the valid entries */ | |
1409 | if (senddata->addr[startchunk] == 0) | |
1410 | break; | |
1411 | ||
1412 | /* make sure that we have at least 1 EOF entry in the | |
1413 | * remaining entries */ | |
1414 | if (! (senddata->eofmask >> (startchunk + VETH_EOF_SHIFT))) { | |
61a3c696 ME |
1415 | veth_error("Missing EOF fragment in event " |
1416 | "eofmask = 0x%x startchunk = %d\n", | |
1417 | (unsigned)senddata->eofmask, | |
1418 | startchunk); | |
1da177e4 LT |
1419 | break; |
1420 | } | |
1421 | ||
1422 | /* build list of chunks in this frame */ | |
1423 | nchunks = 0; | |
1424 | do { | |
1425 | remote_list[nchunks].addr = | |
1426 | (u64) senddata->addr[startchunk+nchunks] << 32; | |
1427 | remote_list[nchunks].size = | |
1428 | senddata->len[startchunk+nchunks]; | |
1429 | length += remote_list[nchunks].size; | |
1430 | } while (! (senddata->eofmask & | |
1431 | (1 << (VETH_EOF_SHIFT + startchunk + nchunks++)))); | |
1432 | ||
1433 | /* length == total length of all chunks */ | |
1434 | /* nchunks == # of chunks in this frame */ | |
1435 | ||
1436 | if ((length - ETH_HLEN) > VETH_MAX_MTU) { | |
61a3c696 ME |
1437 | veth_error("Received oversize frame from LPAR %d " |
1438 | "(length = %d)\n", | |
1439 | cnx->remote_lp, length); | |
1da177e4 LT |
1440 | continue; |
1441 | } | |
1442 | ||
1443 | skb = alloc_skb(length, GFP_ATOMIC); | |
1444 | if (!skb) | |
1445 | continue; | |
1446 | ||
1447 | veth_build_dma_list(local_list, skb->data, length); | |
1448 | ||
1449 | rc = HvCallEvent_dmaBufList(HvLpEvent_Type_VirtualLan, | |
1450 | event->base_event.xSourceLp, | |
1451 | HvLpDma_Direction_RemoteToLocal, | |
1452 | cnx->src_inst, | |
1453 | cnx->dst_inst, | |
1454 | HvLpDma_AddressType_RealAddress, | |
1455 | HvLpDma_AddressType_TceIndex, | |
1456 | ISERIES_HV_ADDR(&local_list), | |
1457 | ISERIES_HV_ADDR(&remote_list), | |
1458 | length); | |
1459 | if (rc != HvLpDma_Rc_Good) { | |
1460 | dev_kfree_skb_irq(skb); | |
1461 | continue; | |
1462 | } | |
1463 | ||
1464 | vlan = skb->data[9]; | |
1465 | dev = veth_dev[vlan]; | |
41664c03 ME |
1466 | if (! dev) { |
1467 | /* | |
1468 | * Some earlier versions of the driver sent | |
1469 | * broadcasts down all connections, even to lpars | |
1470 | * that weren't on the relevant vlan. So ignore | |
1471 | * packets belonging to a vlan we're not on. | |
1472 | * We can also be here if we receive packets while | |
1473 | * the driver is going down, because then dev is NULL. | |
1474 | */ | |
1475 | dev_kfree_skb_irq(skb); | |
1da177e4 | 1476 | continue; |
41664c03 | 1477 | } |
1da177e4 LT |
1478 | |
1479 | port = (struct veth_port *)dev->priv; | |
1480 | dest = *((u64 *) skb->data) & 0xFFFFFFFFFFFF0000; | |
1481 | ||
1482 | if ((vlan > HVMAXARCHITECTEDVIRTUALLANS) || !port) { | |
1483 | dev_kfree_skb_irq(skb); | |
1484 | continue; | |
1485 | } | |
1486 | if (! veth_frame_wanted(port, dest)) { | |
1487 | dev_kfree_skb_irq(skb); | |
1488 | continue; | |
1489 | } | |
1490 | ||
1491 | skb_put(skb, length); | |
1492 | skb->dev = dev; | |
1493 | skb->protocol = eth_type_trans(skb, dev); | |
1494 | skb->ip_summed = CHECKSUM_NONE; | |
1495 | netif_rx(skb); /* send it up */ | |
1496 | port->stats.rx_packets++; | |
1497 | port->stats.rx_bytes += length; | |
1498 | } while (startchunk += nchunks, startchunk < VETH_MAX_FRAMES_PER_MSG); | |
1499 | ||
1500 | /* Ack it */ | |
1501 | spin_lock_irqsave(&cnx->lock, flags); | |
1502 | BUG_ON(cnx->num_pending_acks > VETH_MAX_ACKS_PER_MSG); | |
1503 | ||
1504 | cnx->pending_acks[cnx->num_pending_acks++] = | |
1505 | event->base_event.xCorrelationToken; | |
1506 | ||
1507 | if ( (cnx->num_pending_acks >= cnx->remote_caps.ack_threshold) | |
1508 | || (cnx->num_pending_acks >= VETH_MAX_ACKS_PER_MSG) ) | |
1509 | veth_flush_acks(cnx); | |
1510 | ||
1511 | spin_unlock_irqrestore(&cnx->lock, flags); | |
1512 | } | |
1513 | ||
1514 | static void veth_timed_ack(unsigned long ptr) | |
1515 | { | |
1516 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *) ptr; | |
1517 | unsigned long flags; | |
1518 | ||
1519 | /* Ack all the events */ | |
1520 | spin_lock_irqsave(&cnx->lock, flags); | |
1521 | if (cnx->num_pending_acks > 0) | |
1522 | veth_flush_acks(cnx); | |
1523 | ||
1524 | /* Reschedule the timer */ | |
1525 | cnx->ack_timer.expires = jiffies + cnx->ack_timeout; | |
1526 | add_timer(&cnx->ack_timer); | |
1527 | spin_unlock_irqrestore(&cnx->lock, flags); | |
1528 | } | |
1529 | ||
1530 | static int veth_remove(struct vio_dev *vdev) | |
1531 | { | |
f0c129ca | 1532 | struct veth_lpar_connection *cnx; |
1da177e4 | 1533 | struct net_device *dev; |
f0c129ca ME |
1534 | struct veth_port *port; |
1535 | int i; | |
1da177e4 | 1536 | |
f0c129ca ME |
1537 | dev = veth_dev[vdev->unit_address]; |
1538 | ||
1539 | if (! dev) | |
1540 | return 0; | |
1541 | ||
1542 | port = netdev_priv(dev); | |
1543 | ||
1544 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1545 | cnx = veth_cnx[i]; | |
1546 | ||
1547 | if (cnx && (port->lpar_map & (1 << i))) { | |
1548 | /* Drop our reference to connections on our VLAN */ | |
1549 | kobject_put(&cnx->kobject); | |
1550 | } | |
1da177e4 | 1551 | } |
f0c129ca ME |
1552 | |
1553 | veth_dev[vdev->unit_address] = NULL; | |
07a5c172 ME |
1554 | kobject_del(&port->kobject); |
1555 | kobject_put(&port->kobject); | |
f0c129ca ME |
1556 | unregister_netdev(dev); |
1557 | free_netdev(dev); | |
1558 | ||
1da177e4 LT |
1559 | return 0; |
1560 | } | |
1561 | ||
1562 | static int veth_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
1563 | { | |
1564 | int i = vdev->unit_address; | |
1565 | struct net_device *dev; | |
f0c129ca | 1566 | struct veth_port *port; |
1da177e4 LT |
1567 | |
1568 | dev = veth_probe_one(i, &vdev->dev); | |
1569 | if (dev == NULL) { | |
1570 | veth_remove(vdev); | |
1571 | return 1; | |
1572 | } | |
1573 | veth_dev[i] = dev; | |
1574 | ||
f0c129ca ME |
1575 | port = (struct veth_port*)netdev_priv(dev); |
1576 | ||
1577 | /* Start the state machine on each connection on this vlan. If we're | |
1578 | * the first dev to do so this will commence link negotiation */ | |
1579 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1580 | struct veth_lpar_connection *cnx; | |
1581 | ||
1582 | if (! (port->lpar_map & (1 << i))) | |
1583 | continue; | |
1584 | ||
1585 | cnx = veth_cnx[i]; | |
1586 | if (!cnx) | |
1587 | continue; | |
1588 | ||
1589 | kobject_get(&cnx->kobject); | |
1590 | veth_kick_statemachine(cnx); | |
1591 | } | |
1da177e4 LT |
1592 | |
1593 | return 0; | |
1594 | } | |
1595 | ||
1596 | /** | |
1597 | * veth_device_table: Used by vio.c to match devices that we | |
1598 | * support. | |
1599 | */ | |
1600 | static struct vio_device_id veth_device_table[] __devinitdata = { | |
1601 | { "vlan", "" }, | |
fb120da6 | 1602 | { "", "" } |
1da177e4 LT |
1603 | }; |
1604 | MODULE_DEVICE_TABLE(vio, veth_device_table); | |
1605 | ||
1606 | static struct vio_driver veth_driver = { | |
1607 | .name = "iseries_veth", | |
1608 | .id_table = veth_device_table, | |
1609 | .probe = veth_probe, | |
1610 | .remove = veth_remove | |
1611 | }; | |
1612 | ||
1613 | /* | |
1614 | * Module initialization/cleanup | |
1615 | */ | |
1616 | ||
1617 | void __exit veth_module_cleanup(void) | |
1618 | { | |
1619 | int i; | |
f0c129ca | 1620 | struct veth_lpar_connection *cnx; |
1da177e4 | 1621 | |
f0c129ca | 1622 | /* Disconnect our "irq" to stop events coming from the Hypervisor. */ |
1da177e4 LT |
1623 | HvLpEvent_unregisterHandler(HvLpEvent_Type_VirtualLan); |
1624 | ||
f0c129ca | 1625 | /* Make sure any work queued from Hypervisor callbacks is finished. */ |
1da177e4 LT |
1626 | flush_scheduled_work(); |
1627 | ||
f0c129ca ME |
1628 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { |
1629 | cnx = veth_cnx[i]; | |
1630 | ||
1631 | if (!cnx) | |
1632 | continue; | |
b2e0852e | 1633 | |
76812d81 ME |
1634 | /* Remove the connection from sysfs */ |
1635 | kobject_del(&cnx->kobject); | |
f0c129ca ME |
1636 | /* Drop the driver's reference to the connection */ |
1637 | kobject_put(&cnx->kobject); | |
1638 | } | |
1da177e4 | 1639 | |
f0c129ca ME |
1640 | /* Unregister the driver, which will close all the netdevs and stop |
1641 | * the connections when they're no longer referenced. */ | |
1642 | vio_unregister_driver(&veth_driver); | |
1da177e4 LT |
1643 | } |
1644 | module_exit(veth_module_cleanup); | |
1645 | ||
1646 | int __init veth_module_init(void) | |
1647 | { | |
1648 | int i; | |
1649 | int rc; | |
1650 | ||
1651 | this_lp = HvLpConfig_getLpIndex_outline(); | |
1652 | ||
1653 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { | |
1654 | rc = veth_init_connection(i); | |
ec60beeb ME |
1655 | if (rc != 0) |
1656 | goto error; | |
1da177e4 LT |
1657 | } |
1658 | ||
1659 | HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan, | |
1660 | &veth_handle_event); | |
1661 | ||
ec60beeb ME |
1662 | rc = vio_register_driver(&veth_driver); |
1663 | if (rc != 0) | |
1664 | goto error; | |
1665 | ||
76812d81 ME |
1666 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { |
1667 | struct kobject *kobj; | |
1668 | ||
1669 | if (!veth_cnx[i]) | |
1670 | continue; | |
1671 | ||
1672 | kobj = &veth_cnx[i]->kobject; | |
1673 | kobj->parent = &veth_driver.driver.kobj; | |
1674 | /* If the add failes, complain but otherwise continue */ | |
1675 | if (0 != kobject_add(kobj)) | |
1676 | veth_error("cnx %d: Failed adding to sysfs.\n", i); | |
1677 | } | |
1678 | ||
ec60beeb ME |
1679 | return 0; |
1680 | ||
1681 | error: | |
1682 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { | |
f0c129ca | 1683 | veth_destroy_connection(veth_cnx[i]); |
ec60beeb ME |
1684 | } |
1685 | ||
1686 | return rc; | |
1da177e4 LT |
1687 | } |
1688 | module_init(veth_module_init); |