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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 | MODULE_AUTHOR("Kyle Lucke <klucke@us.ibm.com>"); |
85 | MODULE_DESCRIPTION("iSeries Virtual ethernet driver"); | |
86 | MODULE_LICENSE("GPL"); | |
87 | ||
59f17aeb ME |
88 | #define VETH_EVENT_CAP (0) |
89 | #define VETH_EVENT_FRAMES (1) | |
90 | #define VETH_EVENT_MONITOR (2) | |
91 | #define VETH_EVENT_FRAMES_ACK (3) | |
642d1a4c ME |
92 | |
93 | #define VETH_MAX_ACKS_PER_MSG (20) | |
94 | #define VETH_MAX_FRAMES_PER_MSG (6) | |
95 | ||
59f17aeb | 96 | struct veth_frames_data { |
642d1a4c ME |
97 | u32 addr[VETH_MAX_FRAMES_PER_MSG]; |
98 | u16 len[VETH_MAX_FRAMES_PER_MSG]; | |
99 | u32 eofmask; | |
100 | }; | |
101 | #define VETH_EOF_SHIFT (32-VETH_MAX_FRAMES_PER_MSG) | |
102 | ||
59f17aeb | 103 | struct veth_frames_ack_data { |
642d1a4c ME |
104 | u16 token[VETH_MAX_ACKS_PER_MSG]; |
105 | }; | |
106 | ||
59f17aeb | 107 | struct veth_cap_data { |
642d1a4c ME |
108 | u8 caps_version; |
109 | u8 rsvd1; | |
110 | u16 num_buffers; | |
111 | u16 ack_threshold; | |
112 | u16 rsvd2; | |
113 | u32 ack_timeout; | |
114 | u32 rsvd3; | |
115 | u64 rsvd4[3]; | |
116 | }; | |
117 | ||
59f17aeb | 118 | struct veth_lpevent { |
642d1a4c ME |
119 | struct HvLpEvent base_event; |
120 | union { | |
59f17aeb ME |
121 | struct veth_cap_data caps_data; |
122 | struct veth_frames_data frames_data; | |
123 | struct veth_frames_ack_data frames_ack_data; | |
642d1a4c ME |
124 | } u; |
125 | ||
126 | }; | |
127 | ||
ee05f031 ME |
128 | #define DRV_NAME "iseries_veth" |
129 | #define DRV_VERSION "2.0" | |
130 | ||
1da177e4 LT |
131 | #define VETH_NUMBUFFERS (120) |
132 | #define VETH_ACKTIMEOUT (1000000) /* microseconds */ | |
133 | #define VETH_MAX_MCAST (12) | |
134 | ||
135 | #define VETH_MAX_MTU (9000) | |
136 | ||
137 | #if VETH_NUMBUFFERS < 10 | |
138 | #define ACK_THRESHOLD (1) | |
139 | #elif VETH_NUMBUFFERS < 20 | |
140 | #define ACK_THRESHOLD (4) | |
141 | #elif VETH_NUMBUFFERS < 40 | |
142 | #define ACK_THRESHOLD (10) | |
143 | #else | |
144 | #define ACK_THRESHOLD (20) | |
145 | #endif | |
146 | ||
147 | #define VETH_STATE_SHUTDOWN (0x0001) | |
148 | #define VETH_STATE_OPEN (0x0002) | |
149 | #define VETH_STATE_RESET (0x0004) | |
150 | #define VETH_STATE_SENTMON (0x0008) | |
151 | #define VETH_STATE_SENTCAPS (0x0010) | |
152 | #define VETH_STATE_GOTCAPACK (0x0020) | |
153 | #define VETH_STATE_GOTCAPS (0x0040) | |
154 | #define VETH_STATE_SENTCAPACK (0x0080) | |
155 | #define VETH_STATE_READY (0x0100) | |
156 | ||
157 | struct veth_msg { | |
158 | struct veth_msg *next; | |
59f17aeb | 159 | struct veth_frames_data data; |
1da177e4 | 160 | int token; |
b08bd5c0 | 161 | int in_use; |
1da177e4 LT |
162 | struct sk_buff *skb; |
163 | struct device *dev; | |
164 | }; | |
165 | ||
166 | struct veth_lpar_connection { | |
167 | HvLpIndex remote_lp; | |
168 | struct work_struct statemachine_wq; | |
169 | struct veth_msg *msgs; | |
170 | int num_events; | |
59f17aeb | 171 | struct veth_cap_data local_caps; |
1da177e4 | 172 | |
f0c129ca | 173 | struct kobject kobject; |
1da177e4 LT |
174 | struct timer_list ack_timer; |
175 | ||
24562ffa ME |
176 | struct timer_list reset_timer; |
177 | unsigned int reset_timeout; | |
178 | unsigned long last_contact; | |
179 | int outstanding_tx; | |
180 | ||
1da177e4 LT |
181 | spinlock_t lock; |
182 | unsigned long state; | |
183 | HvLpInstanceId src_inst; | |
184 | HvLpInstanceId dst_inst; | |
59f17aeb | 185 | struct veth_lpevent cap_event, cap_ack_event; |
1da177e4 LT |
186 | u16 pending_acks[VETH_MAX_ACKS_PER_MSG]; |
187 | u32 num_pending_acks; | |
188 | ||
189 | int num_ack_events; | |
59f17aeb | 190 | struct veth_cap_data remote_caps; |
1da177e4 LT |
191 | u32 ack_timeout; |
192 | ||
1da177e4 LT |
193 | struct veth_msg *msg_stack_head; |
194 | }; | |
195 | ||
196 | struct veth_port { | |
197 | struct device *dev; | |
198 | struct net_device_stats stats; | |
199 | u64 mac_addr; | |
200 | HvLpIndexMap lpar_map; | |
201 | ||
e0808494 ME |
202 | /* queue_lock protects the stopped_map and dev's queue. */ |
203 | spinlock_t queue_lock; | |
204 | HvLpIndexMap stopped_map; | |
1da177e4 | 205 | |
e0808494 | 206 | /* mcast_gate protects promiscuous, num_mcast & mcast_addr. */ |
1da177e4 LT |
207 | rwlock_t mcast_gate; |
208 | int promiscuous; | |
1da177e4 LT |
209 | int num_mcast; |
210 | u64 mcast_addr[VETH_MAX_MCAST]; | |
07a5c172 ME |
211 | |
212 | struct kobject kobject; | |
1da177e4 LT |
213 | }; |
214 | ||
215 | static HvLpIndex this_lp; | |
216 | static struct veth_lpar_connection *veth_cnx[HVMAXARCHITECTEDLPS]; /* = 0 */ | |
217 | static struct net_device *veth_dev[HVMAXARCHITECTEDVIRTUALLANS]; /* = 0 */ | |
218 | ||
219 | static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev); | |
220 | static void veth_recycle_msg(struct veth_lpar_connection *, struct veth_msg *); | |
e0808494 ME |
221 | static void veth_wake_queues(struct veth_lpar_connection *cnx); |
222 | static void veth_stop_queues(struct veth_lpar_connection *cnx); | |
59f17aeb | 223 | static void veth_receive(struct veth_lpar_connection *, struct veth_lpevent *); |
f0c129ca | 224 | static void veth_release_connection(struct kobject *kobject); |
24562ffa ME |
225 | static void veth_timed_ack(unsigned long ptr); |
226 | static void veth_timed_reset(unsigned long ptr); | |
f0c129ca | 227 | |
1da177e4 LT |
228 | /* |
229 | * Utility functions | |
230 | */ | |
231 | ||
61a3c696 | 232 | #define veth_info(fmt, args...) \ |
ee05f031 | 233 | printk(KERN_INFO DRV_NAME ": " fmt, ## args) |
1da177e4 LT |
234 | |
235 | #define veth_error(fmt, args...) \ | |
ee05f031 | 236 | printk(KERN_ERR DRV_NAME ": Error: " fmt, ## args) |
61a3c696 ME |
237 | |
238 | #ifdef DEBUG | |
239 | #define veth_debug(fmt, args...) \ | |
ee05f031 | 240 | printk(KERN_DEBUG DRV_NAME ": " fmt, ## args) |
61a3c696 ME |
241 | #else |
242 | #define veth_debug(fmt, args...) do {} while (0) | |
243 | #endif | |
1da177e4 | 244 | |
d7893ddd | 245 | /* You must hold the connection's lock when you call this function. */ |
1da177e4 LT |
246 | static inline void veth_stack_push(struct veth_lpar_connection *cnx, |
247 | struct veth_msg *msg) | |
248 | { | |
1da177e4 LT |
249 | msg->next = cnx->msg_stack_head; |
250 | cnx->msg_stack_head = msg; | |
1da177e4 LT |
251 | } |
252 | ||
d7893ddd | 253 | /* You must hold the connection's lock when you call this function. */ |
1da177e4 LT |
254 | static inline struct veth_msg *veth_stack_pop(struct veth_lpar_connection *cnx) |
255 | { | |
1da177e4 LT |
256 | struct veth_msg *msg; |
257 | ||
1da177e4 LT |
258 | msg = cnx->msg_stack_head; |
259 | if (msg) | |
260 | cnx->msg_stack_head = cnx->msg_stack_head->next; | |
d7893ddd | 261 | |
1da177e4 LT |
262 | return msg; |
263 | } | |
264 | ||
e0808494 ME |
265 | /* You must hold the connection's lock when you call this function. */ |
266 | static inline int veth_stack_is_empty(struct veth_lpar_connection *cnx) | |
267 | { | |
268 | return cnx->msg_stack_head == NULL; | |
269 | } | |
270 | ||
1da177e4 LT |
271 | static inline HvLpEvent_Rc |
272 | veth_signalevent(struct veth_lpar_connection *cnx, u16 subtype, | |
273 | HvLpEvent_AckInd ackind, HvLpEvent_AckType acktype, | |
274 | u64 token, | |
275 | u64 data1, u64 data2, u64 data3, u64 data4, u64 data5) | |
276 | { | |
277 | return HvCallEvent_signalLpEventFast(cnx->remote_lp, | |
278 | HvLpEvent_Type_VirtualLan, | |
279 | subtype, ackind, acktype, | |
280 | cnx->src_inst, | |
281 | cnx->dst_inst, | |
282 | token, data1, data2, data3, | |
283 | data4, data5); | |
284 | } | |
285 | ||
286 | static inline HvLpEvent_Rc veth_signaldata(struct veth_lpar_connection *cnx, | |
287 | u16 subtype, u64 token, void *data) | |
288 | { | |
289 | u64 *p = (u64 *) data; | |
290 | ||
291 | return veth_signalevent(cnx, subtype, HvLpEvent_AckInd_NoAck, | |
292 | HvLpEvent_AckType_ImmediateAck, | |
293 | token, p[0], p[1], p[2], p[3], p[4]); | |
294 | } | |
295 | ||
296 | struct veth_allocation { | |
297 | struct completion c; | |
298 | int num; | |
299 | }; | |
300 | ||
301 | static void veth_complete_allocation(void *parm, int number) | |
302 | { | |
303 | struct veth_allocation *vc = (struct veth_allocation *)parm; | |
304 | ||
305 | vc->num = number; | |
306 | complete(&vc->c); | |
307 | } | |
308 | ||
309 | static int veth_allocate_events(HvLpIndex rlp, int number) | |
310 | { | |
311 | struct veth_allocation vc = { COMPLETION_INITIALIZER(vc.c), 0 }; | |
312 | ||
313 | mf_allocate_lp_events(rlp, HvLpEvent_Type_VirtualLan, | |
59f17aeb | 314 | sizeof(struct veth_lpevent), number, |
1da177e4 LT |
315 | &veth_complete_allocation, &vc); |
316 | wait_for_completion(&vc.c); | |
317 | ||
318 | return vc.num; | |
319 | } | |
320 | ||
76812d81 ME |
321 | /* |
322 | * sysfs support | |
323 | */ | |
324 | ||
325 | struct veth_cnx_attribute { | |
326 | struct attribute attr; | |
327 | ssize_t (*show)(struct veth_lpar_connection *, char *buf); | |
328 | ssize_t (*store)(struct veth_lpar_connection *, const char *buf); | |
329 | }; | |
330 | ||
331 | static ssize_t veth_cnx_attribute_show(struct kobject *kobj, | |
332 | struct attribute *attr, char *buf) | |
333 | { | |
334 | struct veth_cnx_attribute *cnx_attr; | |
335 | struct veth_lpar_connection *cnx; | |
336 | ||
337 | cnx_attr = container_of(attr, struct veth_cnx_attribute, attr); | |
338 | cnx = container_of(kobj, struct veth_lpar_connection, kobject); | |
339 | ||
340 | if (!cnx_attr->show) | |
341 | return -EIO; | |
342 | ||
343 | return cnx_attr->show(cnx, buf); | |
344 | } | |
345 | ||
346 | #define CUSTOM_CNX_ATTR(_name, _format, _expression) \ | |
347 | static ssize_t _name##_show(struct veth_lpar_connection *cnx, char *buf)\ | |
348 | { \ | |
349 | return sprintf(buf, _format, _expression); \ | |
350 | } \ | |
351 | struct veth_cnx_attribute veth_cnx_attr_##_name = __ATTR_RO(_name) | |
352 | ||
353 | #define SIMPLE_CNX_ATTR(_name) \ | |
354 | CUSTOM_CNX_ATTR(_name, "%lu\n", (unsigned long)cnx->_name) | |
355 | ||
356 | SIMPLE_CNX_ATTR(outstanding_tx); | |
357 | SIMPLE_CNX_ATTR(remote_lp); | |
358 | SIMPLE_CNX_ATTR(num_events); | |
359 | SIMPLE_CNX_ATTR(src_inst); | |
360 | SIMPLE_CNX_ATTR(dst_inst); | |
361 | SIMPLE_CNX_ATTR(num_pending_acks); | |
362 | SIMPLE_CNX_ATTR(num_ack_events); | |
363 | CUSTOM_CNX_ATTR(ack_timeout, "%d\n", jiffies_to_msecs(cnx->ack_timeout)); | |
364 | CUSTOM_CNX_ATTR(reset_timeout, "%d\n", jiffies_to_msecs(cnx->reset_timeout)); | |
365 | CUSTOM_CNX_ATTR(state, "0x%.4lX\n", cnx->state); | |
366 | CUSTOM_CNX_ATTR(last_contact, "%d\n", cnx->last_contact ? | |
367 | jiffies_to_msecs(jiffies - cnx->last_contact) : 0); | |
368 | ||
369 | #define GET_CNX_ATTR(_name) (&veth_cnx_attr_##_name.attr) | |
370 | ||
371 | static struct attribute *veth_cnx_default_attrs[] = { | |
372 | GET_CNX_ATTR(outstanding_tx), | |
373 | GET_CNX_ATTR(remote_lp), | |
374 | GET_CNX_ATTR(num_events), | |
375 | GET_CNX_ATTR(reset_timeout), | |
376 | GET_CNX_ATTR(last_contact), | |
377 | GET_CNX_ATTR(state), | |
378 | GET_CNX_ATTR(src_inst), | |
379 | GET_CNX_ATTR(dst_inst), | |
380 | GET_CNX_ATTR(num_pending_acks), | |
381 | GET_CNX_ATTR(num_ack_events), | |
382 | GET_CNX_ATTR(ack_timeout), | |
383 | NULL | |
384 | }; | |
385 | ||
386 | static struct sysfs_ops veth_cnx_sysfs_ops = { | |
387 | .show = veth_cnx_attribute_show | |
388 | }; | |
389 | ||
390 | static struct kobj_type veth_lpar_connection_ktype = { | |
391 | .release = veth_release_connection, | |
392 | .sysfs_ops = &veth_cnx_sysfs_ops, | |
393 | .default_attrs = veth_cnx_default_attrs | |
394 | }; | |
395 | ||
07a5c172 ME |
396 | struct veth_port_attribute { |
397 | struct attribute attr; | |
398 | ssize_t (*show)(struct veth_port *, char *buf); | |
399 | ssize_t (*store)(struct veth_port *, const char *buf); | |
400 | }; | |
401 | ||
402 | static ssize_t veth_port_attribute_show(struct kobject *kobj, | |
403 | struct attribute *attr, char *buf) | |
404 | { | |
405 | struct veth_port_attribute *port_attr; | |
406 | struct veth_port *port; | |
407 | ||
408 | port_attr = container_of(attr, struct veth_port_attribute, attr); | |
409 | port = container_of(kobj, struct veth_port, kobject); | |
410 | ||
411 | if (!port_attr->show) | |
412 | return -EIO; | |
413 | ||
414 | return port_attr->show(port, buf); | |
415 | } | |
416 | ||
417 | #define CUSTOM_PORT_ATTR(_name, _format, _expression) \ | |
418 | static ssize_t _name##_show(struct veth_port *port, char *buf) \ | |
419 | { \ | |
420 | return sprintf(buf, _format, _expression); \ | |
421 | } \ | |
422 | struct veth_port_attribute veth_port_attr_##_name = __ATTR_RO(_name) | |
423 | ||
424 | #define SIMPLE_PORT_ATTR(_name) \ | |
425 | CUSTOM_PORT_ATTR(_name, "%lu\n", (unsigned long)port->_name) | |
426 | ||
427 | SIMPLE_PORT_ATTR(promiscuous); | |
428 | SIMPLE_PORT_ATTR(num_mcast); | |
429 | CUSTOM_PORT_ATTR(lpar_map, "0x%X\n", port->lpar_map); | |
430 | CUSTOM_PORT_ATTR(stopped_map, "0x%X\n", port->stopped_map); | |
431 | CUSTOM_PORT_ATTR(mac_addr, "0x%lX\n", port->mac_addr); | |
432 | ||
433 | #define GET_PORT_ATTR(_name) (&veth_port_attr_##_name.attr) | |
434 | static struct attribute *veth_port_default_attrs[] = { | |
435 | GET_PORT_ATTR(mac_addr), | |
436 | GET_PORT_ATTR(lpar_map), | |
437 | GET_PORT_ATTR(stopped_map), | |
438 | GET_PORT_ATTR(promiscuous), | |
439 | GET_PORT_ATTR(num_mcast), | |
440 | NULL | |
441 | }; | |
442 | ||
443 | static struct sysfs_ops veth_port_sysfs_ops = { | |
444 | .show = veth_port_attribute_show | |
445 | }; | |
446 | ||
447 | static struct kobj_type veth_port_ktype = { | |
448 | .sysfs_ops = &veth_port_sysfs_ops, | |
449 | .default_attrs = veth_port_default_attrs | |
450 | }; | |
451 | ||
1da177e4 LT |
452 | /* |
453 | * LPAR connection code | |
454 | */ | |
455 | ||
456 | static inline void veth_kick_statemachine(struct veth_lpar_connection *cnx) | |
457 | { | |
458 | schedule_work(&cnx->statemachine_wq); | |
459 | } | |
460 | ||
461 | static void veth_take_cap(struct veth_lpar_connection *cnx, | |
59f17aeb | 462 | struct veth_lpevent *event) |
1da177e4 LT |
463 | { |
464 | unsigned long flags; | |
465 | ||
466 | spin_lock_irqsave(&cnx->lock, flags); | |
467 | /* Receiving caps may mean the other end has just come up, so | |
468 | * we need to reload the instance ID of the far end */ | |
469 | cnx->dst_inst = | |
470 | HvCallEvent_getTargetLpInstanceId(cnx->remote_lp, | |
471 | HvLpEvent_Type_VirtualLan); | |
472 | ||
473 | if (cnx->state & VETH_STATE_GOTCAPS) { | |
61a3c696 | 474 | veth_error("Received a second capabilities from LPAR %d.\n", |
1da177e4 LT |
475 | cnx->remote_lp); |
476 | event->base_event.xRc = HvLpEvent_Rc_BufferNotAvailable; | |
477 | HvCallEvent_ackLpEvent((struct HvLpEvent *) event); | |
478 | } else { | |
479 | memcpy(&cnx->cap_event, event, sizeof(cnx->cap_event)); | |
480 | cnx->state |= VETH_STATE_GOTCAPS; | |
481 | veth_kick_statemachine(cnx); | |
482 | } | |
483 | spin_unlock_irqrestore(&cnx->lock, flags); | |
484 | } | |
485 | ||
486 | static void veth_take_cap_ack(struct veth_lpar_connection *cnx, | |
59f17aeb | 487 | struct veth_lpevent *event) |
1da177e4 LT |
488 | { |
489 | unsigned long flags; | |
490 | ||
491 | spin_lock_irqsave(&cnx->lock, flags); | |
492 | if (cnx->state & VETH_STATE_GOTCAPACK) { | |
61a3c696 | 493 | veth_error("Received a second capabilities ack from LPAR %d.\n", |
1da177e4 LT |
494 | cnx->remote_lp); |
495 | } else { | |
496 | memcpy(&cnx->cap_ack_event, event, | |
497 | sizeof(&cnx->cap_ack_event)); | |
498 | cnx->state |= VETH_STATE_GOTCAPACK; | |
499 | veth_kick_statemachine(cnx); | |
500 | } | |
501 | spin_unlock_irqrestore(&cnx->lock, flags); | |
502 | } | |
503 | ||
504 | static void veth_take_monitor_ack(struct veth_lpar_connection *cnx, | |
59f17aeb | 505 | struct veth_lpevent *event) |
1da177e4 LT |
506 | { |
507 | unsigned long flags; | |
508 | ||
509 | spin_lock_irqsave(&cnx->lock, flags); | |
61a3c696 | 510 | veth_debug("cnx %d: lost connection.\n", cnx->remote_lp); |
58c5900b ME |
511 | |
512 | /* Avoid kicking the statemachine once we're shutdown. | |
513 | * It's unnecessary and it could break veth_stop_connection(). */ | |
514 | ||
515 | if (! (cnx->state & VETH_STATE_SHUTDOWN)) { | |
516 | cnx->state |= VETH_STATE_RESET; | |
517 | veth_kick_statemachine(cnx); | |
518 | } | |
1da177e4 LT |
519 | spin_unlock_irqrestore(&cnx->lock, flags); |
520 | } | |
521 | ||
59f17aeb | 522 | static void veth_handle_ack(struct veth_lpevent *event) |
1da177e4 LT |
523 | { |
524 | HvLpIndex rlp = event->base_event.xTargetLp; | |
525 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; | |
526 | ||
527 | BUG_ON(! cnx); | |
528 | ||
529 | switch (event->base_event.xSubtype) { | |
59f17aeb | 530 | case VETH_EVENT_CAP: |
1da177e4 LT |
531 | veth_take_cap_ack(cnx, event); |
532 | break; | |
59f17aeb | 533 | case VETH_EVENT_MONITOR: |
1da177e4 LT |
534 | veth_take_monitor_ack(cnx, event); |
535 | break; | |
536 | default: | |
61a3c696 ME |
537 | veth_error("Unknown ack type %d from LPAR %d.\n", |
538 | event->base_event.xSubtype, rlp); | |
1da177e4 LT |
539 | }; |
540 | } | |
541 | ||
59f17aeb | 542 | static void veth_handle_int(struct veth_lpevent *event) |
1da177e4 LT |
543 | { |
544 | HvLpIndex rlp = event->base_event.xSourceLp; | |
545 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; | |
546 | unsigned long flags; | |
24562ffa | 547 | int i, acked = 0; |
1da177e4 LT |
548 | |
549 | BUG_ON(! cnx); | |
550 | ||
551 | switch (event->base_event.xSubtype) { | |
59f17aeb | 552 | case VETH_EVENT_CAP: |
1da177e4 LT |
553 | veth_take_cap(cnx, event); |
554 | break; | |
59f17aeb | 555 | case VETH_EVENT_MONITOR: |
1da177e4 LT |
556 | /* do nothing... this'll hang out here til we're dead, |
557 | * and the hypervisor will return it for us. */ | |
558 | break; | |
59f17aeb | 559 | case VETH_EVENT_FRAMES_ACK: |
1da177e4 | 560 | spin_lock_irqsave(&cnx->lock, flags); |
24562ffa | 561 | |
1da177e4 LT |
562 | for (i = 0; i < VETH_MAX_ACKS_PER_MSG; ++i) { |
563 | u16 msgnum = event->u.frames_ack_data.token[i]; | |
564 | ||
24562ffa | 565 | if (msgnum < VETH_NUMBUFFERS) { |
1da177e4 | 566 | veth_recycle_msg(cnx, cnx->msgs + msgnum); |
24562ffa ME |
567 | cnx->outstanding_tx--; |
568 | acked++; | |
569 | } | |
1da177e4 | 570 | } |
24562ffa | 571 | |
e0808494 | 572 | if (acked > 0) { |
24562ffa | 573 | cnx->last_contact = jiffies; |
e0808494 ME |
574 | veth_wake_queues(cnx); |
575 | } | |
24562ffa | 576 | |
1da177e4 | 577 | spin_unlock_irqrestore(&cnx->lock, flags); |
1da177e4 | 578 | break; |
59f17aeb | 579 | case VETH_EVENT_FRAMES: |
1da177e4 LT |
580 | veth_receive(cnx, event); |
581 | break; | |
582 | default: | |
61a3c696 ME |
583 | veth_error("Unknown interrupt type %d from LPAR %d.\n", |
584 | event->base_event.xSubtype, rlp); | |
1da177e4 LT |
585 | }; |
586 | } | |
587 | ||
588 | static void veth_handle_event(struct HvLpEvent *event, struct pt_regs *regs) | |
589 | { | |
59f17aeb | 590 | struct veth_lpevent *veth_event = (struct veth_lpevent *)event; |
1da177e4 LT |
591 | |
592 | if (event->xFlags.xFunction == HvLpEvent_Function_Ack) | |
593 | veth_handle_ack(veth_event); | |
594 | else if (event->xFlags.xFunction == HvLpEvent_Function_Int) | |
595 | veth_handle_int(veth_event); | |
596 | } | |
597 | ||
598 | static int veth_process_caps(struct veth_lpar_connection *cnx) | |
599 | { | |
59f17aeb | 600 | struct veth_cap_data *remote_caps = &cnx->remote_caps; |
1da177e4 LT |
601 | int num_acks_needed; |
602 | ||
603 | /* Convert timer to jiffies */ | |
604 | cnx->ack_timeout = remote_caps->ack_timeout * HZ / 1000000; | |
605 | ||
606 | if ( (remote_caps->num_buffers == 0) | |
607 | || (remote_caps->ack_threshold > VETH_MAX_ACKS_PER_MSG) | |
608 | || (remote_caps->ack_threshold == 0) | |
609 | || (cnx->ack_timeout == 0) ) { | |
61a3c696 ME |
610 | veth_error("Received incompatible capabilities from LPAR %d.\n", |
611 | cnx->remote_lp); | |
1da177e4 LT |
612 | return HvLpEvent_Rc_InvalidSubtypeData; |
613 | } | |
614 | ||
615 | num_acks_needed = (remote_caps->num_buffers | |
616 | / remote_caps->ack_threshold) + 1; | |
617 | ||
618 | /* FIXME: locking on num_ack_events? */ | |
619 | if (cnx->num_ack_events < num_acks_needed) { | |
620 | int num; | |
621 | ||
622 | num = veth_allocate_events(cnx->remote_lp, | |
623 | num_acks_needed-cnx->num_ack_events); | |
624 | if (num > 0) | |
625 | cnx->num_ack_events += num; | |
626 | ||
627 | if (cnx->num_ack_events < num_acks_needed) { | |
61a3c696 ME |
628 | veth_error("Couldn't allocate enough ack events " |
629 | "for LPAR %d.\n", cnx->remote_lp); | |
1da177e4 LT |
630 | |
631 | return HvLpEvent_Rc_BufferNotAvailable; | |
632 | } | |
633 | } | |
634 | ||
635 | ||
636 | return HvLpEvent_Rc_Good; | |
637 | } | |
638 | ||
639 | /* FIXME: The gotos here are a bit dubious */ | |
640 | static void veth_statemachine(void *p) | |
641 | { | |
642 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)p; | |
643 | int rlp = cnx->remote_lp; | |
644 | int rc; | |
645 | ||
646 | spin_lock_irq(&cnx->lock); | |
647 | ||
648 | restart: | |
649 | if (cnx->state & VETH_STATE_RESET) { | |
1da177e4 LT |
650 | if (cnx->state & VETH_STATE_OPEN) |
651 | HvCallEvent_closeLpEventPath(cnx->remote_lp, | |
652 | HvLpEvent_Type_VirtualLan); | |
653 | ||
abfda471 ME |
654 | /* |
655 | * Reset ack data. This prevents the ack_timer actually | |
656 | * doing anything, even if it runs one more time when | |
657 | * we drop the lock below. | |
658 | */ | |
1da177e4 LT |
659 | memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks)); |
660 | cnx->num_pending_acks = 0; | |
661 | ||
662 | cnx->state &= ~(VETH_STATE_RESET | VETH_STATE_SENTMON | |
663 | | VETH_STATE_OPEN | VETH_STATE_SENTCAPS | |
664 | | VETH_STATE_GOTCAPACK | VETH_STATE_GOTCAPS | |
665 | | VETH_STATE_SENTCAPACK | VETH_STATE_READY); | |
666 | ||
667 | /* Clean up any leftover messages */ | |
24562ffa ME |
668 | if (cnx->msgs) { |
669 | int i; | |
1da177e4 LT |
670 | for (i = 0; i < VETH_NUMBUFFERS; ++i) |
671 | veth_recycle_msg(cnx, cnx->msgs + i); | |
24562ffa | 672 | } |
e0808494 | 673 | |
24562ffa | 674 | cnx->outstanding_tx = 0; |
e0808494 | 675 | veth_wake_queues(cnx); |
abfda471 ME |
676 | |
677 | /* Drop the lock so we can do stuff that might sleep or | |
678 | * take other locks. */ | |
1da177e4 | 679 | spin_unlock_irq(&cnx->lock); |
abfda471 ME |
680 | |
681 | del_timer_sync(&cnx->ack_timer); | |
24562ffa ME |
682 | del_timer_sync(&cnx->reset_timer); |
683 | ||
1da177e4 | 684 | spin_lock_irq(&cnx->lock); |
abfda471 | 685 | |
1da177e4 LT |
686 | if (cnx->state & VETH_STATE_RESET) |
687 | goto restart; | |
58c5900b ME |
688 | |
689 | /* Hack, wait for the other end to reset itself. */ | |
690 | if (! (cnx->state & VETH_STATE_SHUTDOWN)) { | |
691 | schedule_delayed_work(&cnx->statemachine_wq, 5 * HZ); | |
692 | goto out; | |
693 | } | |
1da177e4 LT |
694 | } |
695 | ||
696 | if (cnx->state & VETH_STATE_SHUTDOWN) | |
697 | /* It's all over, do nothing */ | |
698 | goto out; | |
699 | ||
700 | if ( !(cnx->state & VETH_STATE_OPEN) ) { | |
701 | if (! cnx->msgs || (cnx->num_events < (2 + VETH_NUMBUFFERS)) ) | |
702 | goto cant_cope; | |
703 | ||
704 | HvCallEvent_openLpEventPath(rlp, HvLpEvent_Type_VirtualLan); | |
705 | cnx->src_inst = | |
706 | HvCallEvent_getSourceLpInstanceId(rlp, | |
707 | HvLpEvent_Type_VirtualLan); | |
708 | cnx->dst_inst = | |
709 | HvCallEvent_getTargetLpInstanceId(rlp, | |
710 | HvLpEvent_Type_VirtualLan); | |
711 | cnx->state |= VETH_STATE_OPEN; | |
712 | } | |
713 | ||
714 | if ( (cnx->state & VETH_STATE_OPEN) | |
715 | && !(cnx->state & VETH_STATE_SENTMON) ) { | |
59f17aeb | 716 | rc = veth_signalevent(cnx, VETH_EVENT_MONITOR, |
1da177e4 LT |
717 | HvLpEvent_AckInd_DoAck, |
718 | HvLpEvent_AckType_DeferredAck, | |
719 | 0, 0, 0, 0, 0, 0); | |
720 | ||
721 | if (rc == HvLpEvent_Rc_Good) { | |
722 | cnx->state |= VETH_STATE_SENTMON; | |
723 | } else { | |
724 | if ( (rc != HvLpEvent_Rc_PartitionDead) | |
725 | && (rc != HvLpEvent_Rc_PathClosed) ) | |
61a3c696 ME |
726 | veth_error("Error sending monitor to LPAR %d, " |
727 | "rc = %d\n", rlp, rc); | |
1da177e4 LT |
728 | |
729 | /* Oh well, hope we get a cap from the other | |
730 | * end and do better when that kicks us */ | |
731 | goto out; | |
732 | } | |
733 | } | |
734 | ||
735 | if ( (cnx->state & VETH_STATE_OPEN) | |
736 | && !(cnx->state & VETH_STATE_SENTCAPS)) { | |
737 | u64 *rawcap = (u64 *)&cnx->local_caps; | |
738 | ||
59f17aeb | 739 | rc = veth_signalevent(cnx, VETH_EVENT_CAP, |
1da177e4 LT |
740 | HvLpEvent_AckInd_DoAck, |
741 | HvLpEvent_AckType_ImmediateAck, | |
742 | 0, rawcap[0], rawcap[1], rawcap[2], | |
743 | rawcap[3], rawcap[4]); | |
744 | ||
745 | if (rc == HvLpEvent_Rc_Good) { | |
746 | cnx->state |= VETH_STATE_SENTCAPS; | |
747 | } else { | |
748 | if ( (rc != HvLpEvent_Rc_PartitionDead) | |
749 | && (rc != HvLpEvent_Rc_PathClosed) ) | |
61a3c696 ME |
750 | veth_error("Error sending caps to LPAR %d, " |
751 | "rc = %d\n", rlp, rc); | |
752 | ||
1da177e4 LT |
753 | /* Oh well, hope we get a cap from the other |
754 | * end and do better when that kicks us */ | |
755 | goto out; | |
756 | } | |
757 | } | |
758 | ||
759 | if ((cnx->state & VETH_STATE_GOTCAPS) | |
760 | && !(cnx->state & VETH_STATE_SENTCAPACK)) { | |
59f17aeb | 761 | struct veth_cap_data *remote_caps = &cnx->remote_caps; |
1da177e4 LT |
762 | |
763 | memcpy(remote_caps, &cnx->cap_event.u.caps_data, | |
764 | sizeof(*remote_caps)); | |
765 | ||
766 | spin_unlock_irq(&cnx->lock); | |
767 | rc = veth_process_caps(cnx); | |
768 | spin_lock_irq(&cnx->lock); | |
769 | ||
770 | /* We dropped the lock, so recheck for anything which | |
771 | * might mess us up */ | |
772 | if (cnx->state & (VETH_STATE_RESET|VETH_STATE_SHUTDOWN)) | |
773 | goto restart; | |
774 | ||
775 | cnx->cap_event.base_event.xRc = rc; | |
776 | HvCallEvent_ackLpEvent((struct HvLpEvent *)&cnx->cap_event); | |
777 | if (rc == HvLpEvent_Rc_Good) | |
778 | cnx->state |= VETH_STATE_SENTCAPACK; | |
779 | else | |
780 | goto cant_cope; | |
781 | } | |
782 | ||
783 | if ((cnx->state & VETH_STATE_GOTCAPACK) | |
784 | && (cnx->state & VETH_STATE_GOTCAPS) | |
785 | && !(cnx->state & VETH_STATE_READY)) { | |
786 | if (cnx->cap_ack_event.base_event.xRc == HvLpEvent_Rc_Good) { | |
787 | /* Start the ACK timer */ | |
788 | cnx->ack_timer.expires = jiffies + cnx->ack_timeout; | |
789 | add_timer(&cnx->ack_timer); | |
790 | cnx->state |= VETH_STATE_READY; | |
791 | } else { | |
61a3c696 ME |
792 | veth_error("Caps rejected by LPAR %d, rc = %d\n", |
793 | rlp, cnx->cap_ack_event.base_event.xRc); | |
1da177e4 LT |
794 | goto cant_cope; |
795 | } | |
796 | } | |
797 | ||
798 | out: | |
799 | spin_unlock_irq(&cnx->lock); | |
800 | return; | |
801 | ||
802 | cant_cope: | |
803 | /* FIXME: we get here if something happens we really can't | |
804 | * cope with. The link will never work once we get here, and | |
805 | * all we can do is not lock the rest of the system up */ | |
61a3c696 ME |
806 | veth_error("Unrecoverable error on connection to LPAR %d, shutting down" |
807 | " (state = 0x%04lx)\n", rlp, cnx->state); | |
1da177e4 LT |
808 | cnx->state |= VETH_STATE_SHUTDOWN; |
809 | spin_unlock_irq(&cnx->lock); | |
810 | } | |
811 | ||
812 | static int veth_init_connection(u8 rlp) | |
813 | { | |
814 | struct veth_lpar_connection *cnx; | |
815 | struct veth_msg *msgs; | |
f0c129ca | 816 | int i, rc; |
1da177e4 LT |
817 | |
818 | if ( (rlp == this_lp) | |
819 | || ! HvLpConfig_doLpsCommunicateOnVirtualLan(this_lp, rlp) ) | |
820 | return 0; | |
821 | ||
822 | cnx = kmalloc(sizeof(*cnx), GFP_KERNEL); | |
823 | if (! cnx) | |
824 | return -ENOMEM; | |
825 | memset(cnx, 0, sizeof(*cnx)); | |
826 | ||
827 | cnx->remote_lp = rlp; | |
828 | spin_lock_init(&cnx->lock); | |
829 | INIT_WORK(&cnx->statemachine_wq, veth_statemachine, cnx); | |
24562ffa | 830 | |
1da177e4 LT |
831 | init_timer(&cnx->ack_timer); |
832 | cnx->ack_timer.function = veth_timed_ack; | |
833 | cnx->ack_timer.data = (unsigned long) cnx; | |
24562ffa ME |
834 | |
835 | init_timer(&cnx->reset_timer); | |
836 | cnx->reset_timer.function = veth_timed_reset; | |
837 | cnx->reset_timer.data = (unsigned long) cnx; | |
838 | cnx->reset_timeout = 5 * HZ * (VETH_ACKTIMEOUT / 1000000); | |
839 | ||
1da177e4 LT |
840 | memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks)); |
841 | ||
842 | veth_cnx[rlp] = cnx; | |
843 | ||
f0c129ca ME |
844 | /* This gets us 1 reference, which is held on behalf of the driver |
845 | * infrastructure. It's released at module unload. */ | |
846 | kobject_init(&cnx->kobject); | |
847 | cnx->kobject.ktype = &veth_lpar_connection_ktype; | |
848 | rc = kobject_set_name(&cnx->kobject, "cnx%.2d", rlp); | |
849 | if (rc != 0) | |
850 | return rc; | |
851 | ||
1da177e4 LT |
852 | msgs = kmalloc(VETH_NUMBUFFERS * sizeof(struct veth_msg), GFP_KERNEL); |
853 | if (! msgs) { | |
61a3c696 | 854 | veth_error("Can't allocate buffers for LPAR %d.\n", rlp); |
1da177e4 LT |
855 | return -ENOMEM; |
856 | } | |
857 | ||
858 | cnx->msgs = msgs; | |
859 | memset(msgs, 0, VETH_NUMBUFFERS * sizeof(struct veth_msg)); | |
1da177e4 LT |
860 | |
861 | for (i = 0; i < VETH_NUMBUFFERS; i++) { | |
862 | msgs[i].token = i; | |
863 | veth_stack_push(cnx, msgs + i); | |
864 | } | |
865 | ||
866 | cnx->num_events = veth_allocate_events(rlp, 2 + VETH_NUMBUFFERS); | |
867 | ||
868 | if (cnx->num_events < (2 + VETH_NUMBUFFERS)) { | |
61a3c696 | 869 | veth_error("Can't allocate enough events for LPAR %d.\n", rlp); |
1da177e4 LT |
870 | return -ENOMEM; |
871 | } | |
872 | ||
873 | cnx->local_caps.num_buffers = VETH_NUMBUFFERS; | |
874 | cnx->local_caps.ack_threshold = ACK_THRESHOLD; | |
875 | cnx->local_caps.ack_timeout = VETH_ACKTIMEOUT; | |
876 | ||
877 | return 0; | |
878 | } | |
879 | ||
f0c129ca | 880 | static void veth_stop_connection(struct veth_lpar_connection *cnx) |
1da177e4 | 881 | { |
f0c129ca | 882 | if (!cnx) |
1da177e4 LT |
883 | return; |
884 | ||
885 | spin_lock_irq(&cnx->lock); | |
886 | cnx->state |= VETH_STATE_RESET | VETH_STATE_SHUTDOWN; | |
887 | veth_kick_statemachine(cnx); | |
888 | spin_unlock_irq(&cnx->lock); | |
889 | ||
58c5900b ME |
890 | /* There's a slim chance the reset code has just queued the |
891 | * statemachine to run in five seconds. If so we need to cancel | |
892 | * that and requeue the work to run now. */ | |
893 | if (cancel_delayed_work(&cnx->statemachine_wq)) { | |
894 | spin_lock_irq(&cnx->lock); | |
895 | veth_kick_statemachine(cnx); | |
896 | spin_unlock_irq(&cnx->lock); | |
897 | } | |
898 | ||
abfda471 | 899 | /* Wait for the state machine to run. */ |
1da177e4 | 900 | flush_scheduled_work(); |
ec60beeb ME |
901 | } |
902 | ||
f0c129ca | 903 | static void veth_destroy_connection(struct veth_lpar_connection *cnx) |
ec60beeb | 904 | { |
f0c129ca | 905 | if (!cnx) |
ec60beeb | 906 | return; |
1da177e4 | 907 | |
1da177e4 LT |
908 | if (cnx->num_events > 0) |
909 | mf_deallocate_lp_events(cnx->remote_lp, | |
910 | HvLpEvent_Type_VirtualLan, | |
911 | cnx->num_events, | |
912 | NULL, NULL); | |
913 | if (cnx->num_ack_events > 0) | |
914 | mf_deallocate_lp_events(cnx->remote_lp, | |
915 | HvLpEvent_Type_VirtualLan, | |
916 | cnx->num_ack_events, | |
917 | NULL, NULL); | |
1da177e4 LT |
918 | |
919 | kfree(cnx->msgs); | |
f0c129ca | 920 | veth_cnx[cnx->remote_lp] = NULL; |
1da177e4 | 921 | kfree(cnx); |
f0c129ca ME |
922 | } |
923 | ||
924 | static void veth_release_connection(struct kobject *kobj) | |
925 | { | |
926 | struct veth_lpar_connection *cnx; | |
927 | cnx = container_of(kobj, struct veth_lpar_connection, kobject); | |
928 | veth_stop_connection(cnx); | |
929 | veth_destroy_connection(cnx); | |
1da177e4 LT |
930 | } |
931 | ||
932 | /* | |
933 | * net_device code | |
934 | */ | |
935 | ||
936 | static int veth_open(struct net_device *dev) | |
937 | { | |
938 | struct veth_port *port = (struct veth_port *) dev->priv; | |
939 | ||
940 | memset(&port->stats, 0, sizeof (port->stats)); | |
941 | netif_start_queue(dev); | |
942 | return 0; | |
943 | } | |
944 | ||
945 | static int veth_close(struct net_device *dev) | |
946 | { | |
947 | netif_stop_queue(dev); | |
948 | return 0; | |
949 | } | |
950 | ||
951 | static struct net_device_stats *veth_get_stats(struct net_device *dev) | |
952 | { | |
953 | struct veth_port *port = (struct veth_port *) dev->priv; | |
954 | ||
955 | return &port->stats; | |
956 | } | |
957 | ||
958 | static int veth_change_mtu(struct net_device *dev, int new_mtu) | |
959 | { | |
960 | if ((new_mtu < 68) || (new_mtu > VETH_MAX_MTU)) | |
961 | return -EINVAL; | |
962 | dev->mtu = new_mtu; | |
963 | return 0; | |
964 | } | |
965 | ||
966 | static void veth_set_multicast_list(struct net_device *dev) | |
967 | { | |
968 | struct veth_port *port = (struct veth_port *) dev->priv; | |
969 | unsigned long flags; | |
970 | ||
971 | write_lock_irqsave(&port->mcast_gate, flags); | |
972 | ||
2a5391a1 ME |
973 | if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) || |
974 | (dev->mc_count > VETH_MAX_MCAST)) { | |
1da177e4 | 975 | port->promiscuous = 1; |
1da177e4 LT |
976 | } else { |
977 | struct dev_mc_list *dmi = dev->mc_list; | |
978 | int i; | |
979 | ||
2a5391a1 ME |
980 | port->promiscuous = 0; |
981 | ||
1da177e4 LT |
982 | /* Update table */ |
983 | port->num_mcast = 0; | |
984 | ||
985 | for (i = 0; i < dev->mc_count; i++) { | |
986 | u8 *addr = dmi->dmi_addr; | |
987 | u64 xaddr = 0; | |
988 | ||
989 | if (addr[0] & 0x01) {/* multicast address? */ | |
990 | memcpy(&xaddr, addr, ETH_ALEN); | |
991 | port->mcast_addr[port->num_mcast] = xaddr; | |
992 | port->num_mcast++; | |
993 | } | |
994 | dmi = dmi->next; | |
995 | } | |
996 | } | |
997 | ||
998 | write_unlock_irqrestore(&port->mcast_gate, flags); | |
999 | } | |
1000 | ||
1001 | static void veth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
1002 | { | |
ee05f031 | 1003 | strncpy(info->driver, DRV_NAME, sizeof(info->driver) - 1); |
1da177e4 | 1004 | info->driver[sizeof(info->driver) - 1] = '\0'; |
ee05f031 ME |
1005 | strncpy(info->version, DRV_VERSION, sizeof(info->version) - 1); |
1006 | info->version[sizeof(info->version) - 1] = '\0'; | |
1da177e4 LT |
1007 | } |
1008 | ||
1009 | static int veth_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) | |
1010 | { | |
1011 | ecmd->supported = (SUPPORTED_1000baseT_Full | |
1012 | | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
1013 | ecmd->advertising = (SUPPORTED_1000baseT_Full | |
1014 | | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
1015 | ecmd->port = PORT_FIBRE; | |
1016 | ecmd->transceiver = XCVR_INTERNAL; | |
1017 | ecmd->phy_address = 0; | |
1018 | ecmd->speed = SPEED_1000; | |
1019 | ecmd->duplex = DUPLEX_FULL; | |
1020 | ecmd->autoneg = AUTONEG_ENABLE; | |
1021 | ecmd->maxtxpkt = 120; | |
1022 | ecmd->maxrxpkt = 120; | |
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | static u32 veth_get_link(struct net_device *dev) | |
1027 | { | |
1028 | return 1; | |
1029 | } | |
1030 | ||
1031 | static struct ethtool_ops ops = { | |
1032 | .get_drvinfo = veth_get_drvinfo, | |
1033 | .get_settings = veth_get_settings, | |
1034 | .get_link = veth_get_link, | |
1035 | }; | |
1036 | ||
1da177e4 LT |
1037 | static struct net_device * __init veth_probe_one(int vlan, struct device *vdev) |
1038 | { | |
1039 | struct net_device *dev; | |
1040 | struct veth_port *port; | |
1041 | int i, rc; | |
1042 | ||
1043 | dev = alloc_etherdev(sizeof (struct veth_port)); | |
1044 | if (! dev) { | |
1045 | veth_error("Unable to allocate net_device structure!\n"); | |
1046 | return NULL; | |
1047 | } | |
1048 | ||
1049 | port = (struct veth_port *) dev->priv; | |
1050 | ||
e0808494 | 1051 | spin_lock_init(&port->queue_lock); |
1da177e4 | 1052 | rwlock_init(&port->mcast_gate); |
e0808494 | 1053 | port->stopped_map = 0; |
1da177e4 LT |
1054 | |
1055 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1056 | HvLpVirtualLanIndexMap map; | |
1057 | ||
1058 | if (i == this_lp) | |
1059 | continue; | |
1060 | map = HvLpConfig_getVirtualLanIndexMapForLp(i); | |
1061 | if (map & (0x8000 >> vlan)) | |
1062 | port->lpar_map |= (1 << i); | |
1063 | } | |
1064 | port->dev = vdev; | |
1065 | ||
1066 | dev->dev_addr[0] = 0x02; | |
1067 | dev->dev_addr[1] = 0x01; | |
1068 | dev->dev_addr[2] = 0xff; | |
1069 | dev->dev_addr[3] = vlan; | |
1070 | dev->dev_addr[4] = 0xff; | |
1071 | dev->dev_addr[5] = this_lp; | |
1072 | ||
1073 | dev->mtu = VETH_MAX_MTU; | |
1074 | ||
1075 | memcpy(&port->mac_addr, dev->dev_addr, 6); | |
1076 | ||
1077 | dev->open = veth_open; | |
1078 | dev->hard_start_xmit = veth_start_xmit; | |
1079 | dev->stop = veth_close; | |
1080 | dev->get_stats = veth_get_stats; | |
1081 | dev->change_mtu = veth_change_mtu; | |
1082 | dev->set_mac_address = NULL; | |
1083 | dev->set_multicast_list = veth_set_multicast_list; | |
1084 | SET_ETHTOOL_OPS(dev, &ops); | |
1085 | ||
1da177e4 LT |
1086 | SET_NETDEV_DEV(dev, vdev); |
1087 | ||
1088 | rc = register_netdev(dev); | |
1089 | if (rc != 0) { | |
61a3c696 | 1090 | veth_error("Failed registering net device for vlan%d.\n", vlan); |
1da177e4 LT |
1091 | free_netdev(dev); |
1092 | return NULL; | |
1093 | } | |
1094 | ||
07a5c172 ME |
1095 | kobject_init(&port->kobject); |
1096 | port->kobject.parent = &dev->class_dev.kobj; | |
1097 | port->kobject.ktype = &veth_port_ktype; | |
1098 | kobject_set_name(&port->kobject, "veth_port"); | |
1099 | if (0 != kobject_add(&port->kobject)) | |
1100 | veth_error("Failed adding port for %s to sysfs.\n", dev->name); | |
1101 | ||
61a3c696 ME |
1102 | veth_info("%s attached to iSeries vlan %d (LPAR map = 0x%.4X)\n", |
1103 | dev->name, vlan, port->lpar_map); | |
1da177e4 LT |
1104 | |
1105 | return dev; | |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * Tx path | |
1110 | */ | |
1111 | ||
1112 | static int veth_transmit_to_one(struct sk_buff *skb, HvLpIndex rlp, | |
1113 | struct net_device *dev) | |
1114 | { | |
1115 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; | |
1116 | struct veth_port *port = (struct veth_port *) dev->priv; | |
1117 | HvLpEvent_Rc rc; | |
1da177e4 | 1118 | struct veth_msg *msg = NULL; |
1da177e4 LT |
1119 | unsigned long flags; |
1120 | ||
db5e8718 | 1121 | if (! cnx) |
1da177e4 | 1122 | return 0; |
1da177e4 LT |
1123 | |
1124 | spin_lock_irqsave(&cnx->lock, flags); | |
1125 | ||
f27eff1f | 1126 | if (! (cnx->state & VETH_STATE_READY)) |
db5e8718 | 1127 | goto no_error; |
1da177e4 | 1128 | |
db5e8718 | 1129 | if ((skb->len - ETH_HLEN) > VETH_MAX_MTU) |
1da177e4 LT |
1130 | goto drop; |
1131 | ||
1132 | msg = veth_stack_pop(cnx); | |
db5e8718 | 1133 | if (! msg) |
1da177e4 | 1134 | goto drop; |
1da177e4 | 1135 | |
b08bd5c0 | 1136 | msg->in_use = 1; |
db5e8718 | 1137 | msg->skb = skb_get(skb); |
b08bd5c0 | 1138 | |
cbf9074c ME |
1139 | msg->data.addr[0] = dma_map_single(port->dev, skb->data, |
1140 | skb->len, DMA_TO_DEVICE); | |
1da177e4 | 1141 | |
cbf9074c | 1142 | if (dma_mapping_error(msg->data.addr[0])) |
1da177e4 LT |
1143 | goto recycle_and_drop; |
1144 | ||
1da177e4 | 1145 | msg->dev = port->dev; |
cbf9074c | 1146 | msg->data.len[0] = skb->len; |
1da177e4 | 1147 | msg->data.eofmask = 1 << VETH_EOF_SHIFT; |
cbf9074c | 1148 | |
59f17aeb | 1149 | rc = veth_signaldata(cnx, VETH_EVENT_FRAMES, msg->token, &msg->data); |
1da177e4 LT |
1150 | |
1151 | if (rc != HvLpEvent_Rc_Good) | |
1152 | goto recycle_and_drop; | |
1153 | ||
24562ffa ME |
1154 | /* If the timer's not already running, start it now. */ |
1155 | if (0 == cnx->outstanding_tx) | |
1156 | mod_timer(&cnx->reset_timer, jiffies + cnx->reset_timeout); | |
1157 | ||
1158 | cnx->last_contact = jiffies; | |
1159 | cnx->outstanding_tx++; | |
1160 | ||
e0808494 ME |
1161 | if (veth_stack_is_empty(cnx)) |
1162 | veth_stop_queues(cnx); | |
1163 | ||
db5e8718 | 1164 | no_error: |
1da177e4 LT |
1165 | spin_unlock_irqrestore(&cnx->lock, flags); |
1166 | return 0; | |
1167 | ||
1168 | recycle_and_drop: | |
1da177e4 LT |
1169 | veth_recycle_msg(cnx, msg); |
1170 | drop: | |
1da177e4 | 1171 | spin_unlock_irqrestore(&cnx->lock, flags); |
db5e8718 | 1172 | return 1; |
1da177e4 LT |
1173 | } |
1174 | ||
db5e8718 | 1175 | static void veth_transmit_to_many(struct sk_buff *skb, |
1da177e4 LT |
1176 | HvLpIndexMap lpmask, |
1177 | struct net_device *dev) | |
1178 | { | |
1179 | struct veth_port *port = (struct veth_port *) dev->priv; | |
db5e8718 ME |
1180 | int i, success, error; |
1181 | ||
1182 | success = error = 0; | |
1da177e4 LT |
1183 | |
1184 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1185 | if ((lpmask & (1 << i)) == 0) | |
1186 | continue; | |
1187 | ||
db5e8718 ME |
1188 | if (veth_transmit_to_one(skb, i, dev)) |
1189 | error = 1; | |
1190 | else | |
1191 | success = 1; | |
1da177e4 LT |
1192 | } |
1193 | ||
db5e8718 ME |
1194 | if (error) |
1195 | port->stats.tx_errors++; | |
1196 | ||
1197 | if (success) { | |
1da177e4 LT |
1198 | port->stats.tx_packets++; |
1199 | port->stats.tx_bytes += skb->len; | |
1200 | } | |
1da177e4 LT |
1201 | } |
1202 | ||
1203 | static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1204 | { | |
1205 | unsigned char *frame = skb->data; | |
1206 | struct veth_port *port = (struct veth_port *) dev->priv; | |
1da177e4 LT |
1207 | HvLpIndexMap lpmask; |
1208 | ||
1209 | if (! (frame[0] & 0x01)) { | |
1210 | /* unicast packet */ | |
1211 | HvLpIndex rlp = frame[5]; | |
1212 | ||
1213 | if ( ! ((1 << rlp) & port->lpar_map) ) { | |
1214 | dev_kfree_skb(skb); | |
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | lpmask = 1 << rlp; | |
1219 | } else { | |
1220 | lpmask = port->lpar_map; | |
1221 | } | |
1222 | ||
e0808494 | 1223 | veth_transmit_to_many(skb, lpmask, dev); |
1da177e4 | 1224 | |
e0808494 | 1225 | dev_kfree_skb(skb); |
1da177e4 LT |
1226 | |
1227 | return 0; | |
1228 | } | |
1229 | ||
b08bd5c0 | 1230 | /* You must hold the connection's lock when you call this function. */ |
1da177e4 LT |
1231 | static void veth_recycle_msg(struct veth_lpar_connection *cnx, |
1232 | struct veth_msg *msg) | |
1233 | { | |
1234 | u32 dma_address, dma_length; | |
1235 | ||
b08bd5c0 ME |
1236 | if (msg->in_use) { |
1237 | msg->in_use = 0; | |
1da177e4 LT |
1238 | dma_address = msg->data.addr[0]; |
1239 | dma_length = msg->data.len[0]; | |
1240 | ||
cbf9074c ME |
1241 | if (!dma_mapping_error(dma_address)) |
1242 | dma_unmap_single(msg->dev, dma_address, dma_length, | |
1243 | DMA_TO_DEVICE); | |
1da177e4 LT |
1244 | |
1245 | if (msg->skb) { | |
1246 | dev_kfree_skb_any(msg->skb); | |
1247 | msg->skb = NULL; | |
1248 | } | |
1249 | ||
1250 | memset(&msg->data, 0, sizeof(msg->data)); | |
1251 | veth_stack_push(cnx, msg); | |
61a3c696 ME |
1252 | } else if (cnx->state & VETH_STATE_OPEN) { |
1253 | veth_error("Non-pending frame (# %d) acked by LPAR %d.\n", | |
1254 | cnx->remote_lp, msg->token); | |
1255 | } | |
1da177e4 LT |
1256 | } |
1257 | ||
e0808494 | 1258 | static void veth_wake_queues(struct veth_lpar_connection *cnx) |
1da177e4 LT |
1259 | { |
1260 | int i; | |
e0808494 | 1261 | |
1da177e4 LT |
1262 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) { |
1263 | struct net_device *dev = veth_dev[i]; | |
1264 | struct veth_port *port; | |
1265 | unsigned long flags; | |
1266 | ||
1267 | if (! dev) | |
1268 | continue; | |
1269 | ||
1270 | port = (struct veth_port *)dev->priv; | |
1271 | ||
1272 | if (! (port->lpar_map & (1<<cnx->remote_lp))) | |
1273 | continue; | |
1274 | ||
e0808494 ME |
1275 | spin_lock_irqsave(&port->queue_lock, flags); |
1276 | ||
1277 | port->stopped_map &= ~(1 << cnx->remote_lp); | |
1278 | ||
1279 | if (0 == port->stopped_map && netif_queue_stopped(dev)) { | |
1280 | veth_debug("cnx %d: woke queue for %s.\n", | |
1281 | cnx->remote_lp, dev->name); | |
1282 | netif_wake_queue(dev); | |
1da177e4 | 1283 | } |
e0808494 ME |
1284 | spin_unlock_irqrestore(&port->queue_lock, flags); |
1285 | } | |
1286 | } | |
1287 | ||
1288 | static void veth_stop_queues(struct veth_lpar_connection *cnx) | |
1289 | { | |
1290 | int i; | |
1291 | ||
1292 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) { | |
1293 | struct net_device *dev = veth_dev[i]; | |
1294 | struct veth_port *port; | |
1295 | ||
1296 | if (! dev) | |
1297 | continue; | |
1298 | ||
1299 | port = (struct veth_port *)dev->priv; | |
1300 | ||
1301 | /* If this cnx is not on the vlan for this port, continue */ | |
1302 | if (! (port->lpar_map & (1 << cnx->remote_lp))) | |
1303 | continue; | |
1304 | ||
1305 | spin_lock(&port->queue_lock); | |
1306 | ||
1307 | netif_stop_queue(dev); | |
1308 | port->stopped_map |= (1 << cnx->remote_lp); | |
1309 | ||
1310 | veth_debug("cnx %d: stopped queue for %s, map = 0x%x.\n", | |
1311 | cnx->remote_lp, dev->name, port->stopped_map); | |
1312 | ||
1313 | spin_unlock(&port->queue_lock); | |
1da177e4 LT |
1314 | } |
1315 | } | |
1316 | ||
24562ffa ME |
1317 | static void veth_timed_reset(unsigned long ptr) |
1318 | { | |
1319 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)ptr; | |
1320 | unsigned long trigger_time, flags; | |
1321 | ||
1322 | /* FIXME is it possible this fires after veth_stop_connection()? | |
1323 | * That would reschedule the statemachine for 5 seconds and probably | |
1324 | * execute it after the module's been unloaded. Hmm. */ | |
1325 | ||
1326 | spin_lock_irqsave(&cnx->lock, flags); | |
1327 | ||
1328 | if (cnx->outstanding_tx > 0) { | |
1329 | trigger_time = cnx->last_contact + cnx->reset_timeout; | |
1330 | ||
1331 | if (trigger_time < jiffies) { | |
1332 | cnx->state |= VETH_STATE_RESET; | |
1333 | veth_kick_statemachine(cnx); | |
1334 | veth_error("%d packets not acked by LPAR %d within %d " | |
1335 | "seconds, resetting.\n", | |
1336 | cnx->outstanding_tx, cnx->remote_lp, | |
1337 | cnx->reset_timeout / HZ); | |
1338 | } else { | |
1339 | /* Reschedule the timer */ | |
1340 | trigger_time = jiffies + cnx->reset_timeout; | |
1341 | mod_timer(&cnx->reset_timer, trigger_time); | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | spin_unlock_irqrestore(&cnx->lock, flags); | |
1346 | } | |
1347 | ||
1da177e4 LT |
1348 | /* |
1349 | * Rx path | |
1350 | */ | |
1351 | ||
1352 | static inline int veth_frame_wanted(struct veth_port *port, u64 mac_addr) | |
1353 | { | |
1354 | int wanted = 0; | |
1355 | int i; | |
1356 | unsigned long flags; | |
1357 | ||
1358 | if ( (mac_addr == port->mac_addr) || (mac_addr == 0xffffffffffff0000) ) | |
1359 | return 1; | |
1360 | ||
1da177e4 LT |
1361 | read_lock_irqsave(&port->mcast_gate, flags); |
1362 | ||
2a5391a1 | 1363 | if (port->promiscuous) { |
1da177e4 LT |
1364 | wanted = 1; |
1365 | goto out; | |
1366 | } | |
1367 | ||
1368 | for (i = 0; i < port->num_mcast; ++i) { | |
1369 | if (port->mcast_addr[i] == mac_addr) { | |
1370 | wanted = 1; | |
1371 | break; | |
1372 | } | |
1373 | } | |
1374 | ||
1375 | out: | |
1376 | read_unlock_irqrestore(&port->mcast_gate, flags); | |
1377 | ||
1378 | return wanted; | |
1379 | } | |
1380 | ||
1381 | struct dma_chunk { | |
1382 | u64 addr; | |
1383 | u64 size; | |
1384 | }; | |
1385 | ||
1386 | #define VETH_MAX_PAGES_PER_FRAME ( (VETH_MAX_MTU+PAGE_SIZE-2)/PAGE_SIZE + 1 ) | |
1387 | ||
1388 | static inline void veth_build_dma_list(struct dma_chunk *list, | |
1389 | unsigned char *p, unsigned long length) | |
1390 | { | |
1391 | unsigned long done; | |
1392 | int i = 1; | |
1393 | ||
1394 | /* FIXME: skbs are continguous in real addresses. Do we | |
1395 | * really need to break it into PAGE_SIZE chunks, or can we do | |
1396 | * it just at the granularity of iSeries real->absolute | |
1397 | * mapping? Indeed, given the way the allocator works, can we | |
1398 | * count on them being absolutely contiguous? */ | |
1399 | list[0].addr = ISERIES_HV_ADDR(p); | |
1400 | list[0].size = min(length, | |
1401 | PAGE_SIZE - ((unsigned long)p & ~PAGE_MASK)); | |
1402 | ||
1403 | done = list[0].size; | |
1404 | while (done < length) { | |
1405 | list[i].addr = ISERIES_HV_ADDR(p + done); | |
1406 | list[i].size = min(length-done, PAGE_SIZE); | |
1407 | done += list[i].size; | |
1408 | i++; | |
1409 | } | |
1410 | } | |
1411 | ||
1412 | static void veth_flush_acks(struct veth_lpar_connection *cnx) | |
1413 | { | |
1414 | HvLpEvent_Rc rc; | |
1415 | ||
59f17aeb | 1416 | rc = veth_signaldata(cnx, VETH_EVENT_FRAMES_ACK, |
1da177e4 LT |
1417 | 0, &cnx->pending_acks); |
1418 | ||
1419 | if (rc != HvLpEvent_Rc_Good) | |
61a3c696 ME |
1420 | veth_error("Failed acking frames from LPAR %d, rc = %d\n", |
1421 | cnx->remote_lp, (int)rc); | |
1da177e4 LT |
1422 | |
1423 | cnx->num_pending_acks = 0; | |
1424 | memset(&cnx->pending_acks, 0xff, sizeof(cnx->pending_acks)); | |
1425 | } | |
1426 | ||
1427 | static void veth_receive(struct veth_lpar_connection *cnx, | |
59f17aeb | 1428 | struct veth_lpevent *event) |
1da177e4 | 1429 | { |
59f17aeb | 1430 | struct veth_frames_data *senddata = &event->u.frames_data; |
1da177e4 LT |
1431 | int startchunk = 0; |
1432 | int nchunks; | |
1433 | unsigned long flags; | |
1434 | HvLpDma_Rc rc; | |
1435 | ||
1436 | do { | |
1437 | u16 length = 0; | |
1438 | struct sk_buff *skb; | |
1439 | struct dma_chunk local_list[VETH_MAX_PAGES_PER_FRAME]; | |
1440 | struct dma_chunk remote_list[VETH_MAX_FRAMES_PER_MSG]; | |
1441 | u64 dest; | |
1442 | HvLpVirtualLanIndex vlan; | |
1443 | struct net_device *dev; | |
1444 | struct veth_port *port; | |
1445 | ||
1446 | /* FIXME: do we need this? */ | |
1447 | memset(local_list, 0, sizeof(local_list)); | |
1448 | memset(remote_list, 0, sizeof(VETH_MAX_FRAMES_PER_MSG)); | |
1449 | ||
1450 | /* a 0 address marks the end of the valid entries */ | |
1451 | if (senddata->addr[startchunk] == 0) | |
1452 | break; | |
1453 | ||
1454 | /* make sure that we have at least 1 EOF entry in the | |
1455 | * remaining entries */ | |
1456 | if (! (senddata->eofmask >> (startchunk + VETH_EOF_SHIFT))) { | |
61a3c696 ME |
1457 | veth_error("Missing EOF fragment in event " |
1458 | "eofmask = 0x%x startchunk = %d\n", | |
1459 | (unsigned)senddata->eofmask, | |
1460 | startchunk); | |
1da177e4 LT |
1461 | break; |
1462 | } | |
1463 | ||
1464 | /* build list of chunks in this frame */ | |
1465 | nchunks = 0; | |
1466 | do { | |
1467 | remote_list[nchunks].addr = | |
1468 | (u64) senddata->addr[startchunk+nchunks] << 32; | |
1469 | remote_list[nchunks].size = | |
1470 | senddata->len[startchunk+nchunks]; | |
1471 | length += remote_list[nchunks].size; | |
1472 | } while (! (senddata->eofmask & | |
1473 | (1 << (VETH_EOF_SHIFT + startchunk + nchunks++)))); | |
1474 | ||
1475 | /* length == total length of all chunks */ | |
1476 | /* nchunks == # of chunks in this frame */ | |
1477 | ||
1478 | if ((length - ETH_HLEN) > VETH_MAX_MTU) { | |
61a3c696 ME |
1479 | veth_error("Received oversize frame from LPAR %d " |
1480 | "(length = %d)\n", | |
1481 | cnx->remote_lp, length); | |
1da177e4 LT |
1482 | continue; |
1483 | } | |
1484 | ||
1485 | skb = alloc_skb(length, GFP_ATOMIC); | |
1486 | if (!skb) | |
1487 | continue; | |
1488 | ||
1489 | veth_build_dma_list(local_list, skb->data, length); | |
1490 | ||
1491 | rc = HvCallEvent_dmaBufList(HvLpEvent_Type_VirtualLan, | |
1492 | event->base_event.xSourceLp, | |
1493 | HvLpDma_Direction_RemoteToLocal, | |
1494 | cnx->src_inst, | |
1495 | cnx->dst_inst, | |
1496 | HvLpDma_AddressType_RealAddress, | |
1497 | HvLpDma_AddressType_TceIndex, | |
1498 | ISERIES_HV_ADDR(&local_list), | |
1499 | ISERIES_HV_ADDR(&remote_list), | |
1500 | length); | |
1501 | if (rc != HvLpDma_Rc_Good) { | |
1502 | dev_kfree_skb_irq(skb); | |
1503 | continue; | |
1504 | } | |
1505 | ||
1506 | vlan = skb->data[9]; | |
1507 | dev = veth_dev[vlan]; | |
41664c03 ME |
1508 | if (! dev) { |
1509 | /* | |
1510 | * Some earlier versions of the driver sent | |
1511 | * broadcasts down all connections, even to lpars | |
1512 | * that weren't on the relevant vlan. So ignore | |
1513 | * packets belonging to a vlan we're not on. | |
1514 | * We can also be here if we receive packets while | |
1515 | * the driver is going down, because then dev is NULL. | |
1516 | */ | |
1517 | dev_kfree_skb_irq(skb); | |
1da177e4 | 1518 | continue; |
41664c03 | 1519 | } |
1da177e4 LT |
1520 | |
1521 | port = (struct veth_port *)dev->priv; | |
1522 | dest = *((u64 *) skb->data) & 0xFFFFFFFFFFFF0000; | |
1523 | ||
1524 | if ((vlan > HVMAXARCHITECTEDVIRTUALLANS) || !port) { | |
1525 | dev_kfree_skb_irq(skb); | |
1526 | continue; | |
1527 | } | |
1528 | if (! veth_frame_wanted(port, dest)) { | |
1529 | dev_kfree_skb_irq(skb); | |
1530 | continue; | |
1531 | } | |
1532 | ||
1533 | skb_put(skb, length); | |
1534 | skb->dev = dev; | |
1535 | skb->protocol = eth_type_trans(skb, dev); | |
1536 | skb->ip_summed = CHECKSUM_NONE; | |
1537 | netif_rx(skb); /* send it up */ | |
1538 | port->stats.rx_packets++; | |
1539 | port->stats.rx_bytes += length; | |
1540 | } while (startchunk += nchunks, startchunk < VETH_MAX_FRAMES_PER_MSG); | |
1541 | ||
1542 | /* Ack it */ | |
1543 | spin_lock_irqsave(&cnx->lock, flags); | |
1544 | BUG_ON(cnx->num_pending_acks > VETH_MAX_ACKS_PER_MSG); | |
1545 | ||
1546 | cnx->pending_acks[cnx->num_pending_acks++] = | |
1547 | event->base_event.xCorrelationToken; | |
1548 | ||
1549 | if ( (cnx->num_pending_acks >= cnx->remote_caps.ack_threshold) | |
1550 | || (cnx->num_pending_acks >= VETH_MAX_ACKS_PER_MSG) ) | |
1551 | veth_flush_acks(cnx); | |
1552 | ||
1553 | spin_unlock_irqrestore(&cnx->lock, flags); | |
1554 | } | |
1555 | ||
1556 | static void veth_timed_ack(unsigned long ptr) | |
1557 | { | |
1558 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *) ptr; | |
1559 | unsigned long flags; | |
1560 | ||
1561 | /* Ack all the events */ | |
1562 | spin_lock_irqsave(&cnx->lock, flags); | |
1563 | if (cnx->num_pending_acks > 0) | |
1564 | veth_flush_acks(cnx); | |
1565 | ||
1566 | /* Reschedule the timer */ | |
1567 | cnx->ack_timer.expires = jiffies + cnx->ack_timeout; | |
1568 | add_timer(&cnx->ack_timer); | |
1569 | spin_unlock_irqrestore(&cnx->lock, flags); | |
1570 | } | |
1571 | ||
1572 | static int veth_remove(struct vio_dev *vdev) | |
1573 | { | |
f0c129ca | 1574 | struct veth_lpar_connection *cnx; |
1da177e4 | 1575 | struct net_device *dev; |
f0c129ca ME |
1576 | struct veth_port *port; |
1577 | int i; | |
1da177e4 | 1578 | |
f0c129ca ME |
1579 | dev = veth_dev[vdev->unit_address]; |
1580 | ||
1581 | if (! dev) | |
1582 | return 0; | |
1583 | ||
1584 | port = netdev_priv(dev); | |
1585 | ||
1586 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1587 | cnx = veth_cnx[i]; | |
1588 | ||
1589 | if (cnx && (port->lpar_map & (1 << i))) { | |
1590 | /* Drop our reference to connections on our VLAN */ | |
1591 | kobject_put(&cnx->kobject); | |
1592 | } | |
1da177e4 | 1593 | } |
f0c129ca ME |
1594 | |
1595 | veth_dev[vdev->unit_address] = NULL; | |
07a5c172 ME |
1596 | kobject_del(&port->kobject); |
1597 | kobject_put(&port->kobject); | |
f0c129ca ME |
1598 | unregister_netdev(dev); |
1599 | free_netdev(dev); | |
1600 | ||
1da177e4 LT |
1601 | return 0; |
1602 | } | |
1603 | ||
1604 | static int veth_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
1605 | { | |
1606 | int i = vdev->unit_address; | |
1607 | struct net_device *dev; | |
f0c129ca | 1608 | struct veth_port *port; |
1da177e4 LT |
1609 | |
1610 | dev = veth_probe_one(i, &vdev->dev); | |
1611 | if (dev == NULL) { | |
1612 | veth_remove(vdev); | |
1613 | return 1; | |
1614 | } | |
1615 | veth_dev[i] = dev; | |
1616 | ||
f0c129ca ME |
1617 | port = (struct veth_port*)netdev_priv(dev); |
1618 | ||
1619 | /* Start the state machine on each connection on this vlan. If we're | |
1620 | * the first dev to do so this will commence link negotiation */ | |
1621 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1622 | struct veth_lpar_connection *cnx; | |
1623 | ||
1624 | if (! (port->lpar_map & (1 << i))) | |
1625 | continue; | |
1626 | ||
1627 | cnx = veth_cnx[i]; | |
1628 | if (!cnx) | |
1629 | continue; | |
1630 | ||
1631 | kobject_get(&cnx->kobject); | |
1632 | veth_kick_statemachine(cnx); | |
1633 | } | |
1da177e4 LT |
1634 | |
1635 | return 0; | |
1636 | } | |
1637 | ||
1638 | /** | |
1639 | * veth_device_table: Used by vio.c to match devices that we | |
1640 | * support. | |
1641 | */ | |
1642 | static struct vio_device_id veth_device_table[] __devinitdata = { | |
1643 | { "vlan", "" }, | |
fb120da6 | 1644 | { "", "" } |
1da177e4 LT |
1645 | }; |
1646 | MODULE_DEVICE_TABLE(vio, veth_device_table); | |
1647 | ||
1648 | static struct vio_driver veth_driver = { | |
ee05f031 | 1649 | .name = DRV_NAME, |
1da177e4 LT |
1650 | .id_table = veth_device_table, |
1651 | .probe = veth_probe, | |
1652 | .remove = veth_remove | |
1653 | }; | |
1654 | ||
1655 | /* | |
1656 | * Module initialization/cleanup | |
1657 | */ | |
1658 | ||
1659 | void __exit veth_module_cleanup(void) | |
1660 | { | |
1661 | int i; | |
f0c129ca | 1662 | struct veth_lpar_connection *cnx; |
1da177e4 | 1663 | |
f0c129ca | 1664 | /* Disconnect our "irq" to stop events coming from the Hypervisor. */ |
1da177e4 LT |
1665 | HvLpEvent_unregisterHandler(HvLpEvent_Type_VirtualLan); |
1666 | ||
f0c129ca | 1667 | /* Make sure any work queued from Hypervisor callbacks is finished. */ |
1da177e4 LT |
1668 | flush_scheduled_work(); |
1669 | ||
f0c129ca ME |
1670 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { |
1671 | cnx = veth_cnx[i]; | |
1672 | ||
1673 | if (!cnx) | |
1674 | continue; | |
b2e0852e | 1675 | |
76812d81 ME |
1676 | /* Remove the connection from sysfs */ |
1677 | kobject_del(&cnx->kobject); | |
f0c129ca ME |
1678 | /* Drop the driver's reference to the connection */ |
1679 | kobject_put(&cnx->kobject); | |
1680 | } | |
1da177e4 | 1681 | |
f0c129ca ME |
1682 | /* Unregister the driver, which will close all the netdevs and stop |
1683 | * the connections when they're no longer referenced. */ | |
1684 | vio_unregister_driver(&veth_driver); | |
1da177e4 LT |
1685 | } |
1686 | module_exit(veth_module_cleanup); | |
1687 | ||
1688 | int __init veth_module_init(void) | |
1689 | { | |
1690 | int i; | |
1691 | int rc; | |
1692 | ||
1693 | this_lp = HvLpConfig_getLpIndex_outline(); | |
1694 | ||
1695 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { | |
1696 | rc = veth_init_connection(i); | |
ec60beeb ME |
1697 | if (rc != 0) |
1698 | goto error; | |
1da177e4 LT |
1699 | } |
1700 | ||
1701 | HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan, | |
1702 | &veth_handle_event); | |
1703 | ||
ec60beeb ME |
1704 | rc = vio_register_driver(&veth_driver); |
1705 | if (rc != 0) | |
1706 | goto error; | |
1707 | ||
76812d81 ME |
1708 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { |
1709 | struct kobject *kobj; | |
1710 | ||
1711 | if (!veth_cnx[i]) | |
1712 | continue; | |
1713 | ||
1714 | kobj = &veth_cnx[i]->kobject; | |
1715 | kobj->parent = &veth_driver.driver.kobj; | |
1716 | /* If the add failes, complain but otherwise continue */ | |
1717 | if (0 != kobject_add(kobj)) | |
1718 | veth_error("cnx %d: Failed adding to sysfs.\n", i); | |
1719 | } | |
1720 | ||
ec60beeb ME |
1721 | return 0; |
1722 | ||
1723 | error: | |
1724 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { | |
f0c129ca | 1725 | veth_destroy_connection(veth_cnx[i]); |
ec60beeb ME |
1726 | } |
1727 | ||
1728 | return rc; | |
1da177e4 LT |
1729 | } |
1730 | module_init(veth_module_init); |