Commit | Line | Data |
---|---|---|
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. | |
269cd381 | 7 | * Copyright (C) 2004-2005 Michael Ellerman, IBM Corporation. |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation; either version 2 of the | |
12 | * License, or (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | * | |
24 | * | |
25 | * This module implements the virtual ethernet device for iSeries LPAR | |
26 | * Linux. It uses hypervisor message passing to implement an | |
27 | * ethernet-like network device communicating between partitions on | |
28 | * the iSeries. | |
29 | * | |
30 | * The iSeries LPAR hypervisor currently allows for up to 16 different | |
31 | * virtual ethernets. These are all dynamically configurable on | |
32 | * OS/400 partitions, but dynamic configuration is not supported under | |
33 | * Linux yet. An ethXX network device will be created for each | |
34 | * virtual ethernet this partition is connected to. | |
35 | * | |
36 | * - This driver is responsible for routing packets to and from other | |
37 | * partitions. The MAC addresses used by the virtual ethernets | |
38 | * contains meaning and must not be modified. | |
39 | * | |
40 | * - Having 2 virtual ethernets to the same remote partition DOES NOT | |
41 | * double the available bandwidth. The 2 devices will share the | |
42 | * available hypervisor bandwidth. | |
43 | * | |
44 | * - If you send a packet to your own mac address, it will just be | |
45 | * dropped, you won't get it on the receive side. | |
46 | * | |
47 | * - Multicast is implemented by sending the frame frame to every | |
48 | * other partition. It is the responsibility of the receiving | |
49 | * partition to filter the addresses desired. | |
50 | * | |
51 | * Tunable parameters: | |
52 | * | |
53 | * VETH_NUMBUFFERS: This compile time option defaults to 120. It | |
54 | * controls how much memory Linux will allocate per remote partition | |
55 | * it is communicating with. It can be thought of as the maximum | |
56 | * number of packets outstanding to a remote partition at a time. | |
57 | */ | |
58 | ||
59 | #include <linux/config.h> | |
60 | #include <linux/module.h> | |
61 | #include <linux/version.h> | |
62 | #include <linux/types.h> | |
63 | #include <linux/errno.h> | |
64 | #include <linux/ioport.h> | |
65 | #include <linux/kernel.h> | |
66 | #include <linux/netdevice.h> | |
67 | #include <linux/etherdevice.h> | |
68 | #include <linux/skbuff.h> | |
69 | #include <linux/init.h> | |
70 | #include <linux/delay.h> | |
71 | #include <linux/mm.h> | |
72 | #include <linux/ethtool.h> | |
426c1a11 SR |
73 | |
74 | #include <asm/abs_addr.h> | |
1da177e4 | 75 | #include <asm/iSeries/mf.h> |
1da177e4 LT |
76 | #include <asm/uaccess.h> |
77 | ||
15b17189 | 78 | #include <asm/iseries/hv_lp_config.h> |
1da177e4 LT |
79 | #include <asm/iSeries/HvTypes.h> |
80 | #include <asm/iSeries/HvLpEvent.h> | |
81 | #include <asm/iommu.h> | |
82 | #include <asm/vio.h> | |
83 | ||
61a3c696 ME |
84 | #undef DEBUG |
85 | ||
1da177e4 LT |
86 | MODULE_AUTHOR("Kyle Lucke <klucke@us.ibm.com>"); |
87 | MODULE_DESCRIPTION("iSeries Virtual ethernet driver"); | |
88 | MODULE_LICENSE("GPL"); | |
89 | ||
59f17aeb ME |
90 | #define VETH_EVENT_CAP (0) |
91 | #define VETH_EVENT_FRAMES (1) | |
92 | #define VETH_EVENT_MONITOR (2) | |
93 | #define VETH_EVENT_FRAMES_ACK (3) | |
642d1a4c ME |
94 | |
95 | #define VETH_MAX_ACKS_PER_MSG (20) | |
96 | #define VETH_MAX_FRAMES_PER_MSG (6) | |
97 | ||
59f17aeb | 98 | struct veth_frames_data { |
642d1a4c ME |
99 | u32 addr[VETH_MAX_FRAMES_PER_MSG]; |
100 | u16 len[VETH_MAX_FRAMES_PER_MSG]; | |
101 | u32 eofmask; | |
102 | }; | |
103 | #define VETH_EOF_SHIFT (32-VETH_MAX_FRAMES_PER_MSG) | |
104 | ||
59f17aeb | 105 | struct veth_frames_ack_data { |
642d1a4c ME |
106 | u16 token[VETH_MAX_ACKS_PER_MSG]; |
107 | }; | |
108 | ||
59f17aeb | 109 | struct veth_cap_data { |
642d1a4c ME |
110 | u8 caps_version; |
111 | u8 rsvd1; | |
112 | u16 num_buffers; | |
113 | u16 ack_threshold; | |
114 | u16 rsvd2; | |
115 | u32 ack_timeout; | |
116 | u32 rsvd3; | |
117 | u64 rsvd4[3]; | |
118 | }; | |
119 | ||
59f17aeb | 120 | struct veth_lpevent { |
642d1a4c ME |
121 | struct HvLpEvent base_event; |
122 | union { | |
59f17aeb ME |
123 | struct veth_cap_data caps_data; |
124 | struct veth_frames_data frames_data; | |
125 | struct veth_frames_ack_data frames_ack_data; | |
642d1a4c ME |
126 | } u; |
127 | ||
128 | }; | |
129 | ||
ee05f031 ME |
130 | #define DRV_NAME "iseries_veth" |
131 | #define DRV_VERSION "2.0" | |
132 | ||
1da177e4 LT |
133 | #define VETH_NUMBUFFERS (120) |
134 | #define VETH_ACKTIMEOUT (1000000) /* microseconds */ | |
135 | #define VETH_MAX_MCAST (12) | |
136 | ||
137 | #define VETH_MAX_MTU (9000) | |
138 | ||
139 | #if VETH_NUMBUFFERS < 10 | |
140 | #define ACK_THRESHOLD (1) | |
141 | #elif VETH_NUMBUFFERS < 20 | |
142 | #define ACK_THRESHOLD (4) | |
143 | #elif VETH_NUMBUFFERS < 40 | |
144 | #define ACK_THRESHOLD (10) | |
145 | #else | |
146 | #define ACK_THRESHOLD (20) | |
147 | #endif | |
148 | ||
149 | #define VETH_STATE_SHUTDOWN (0x0001) | |
150 | #define VETH_STATE_OPEN (0x0002) | |
151 | #define VETH_STATE_RESET (0x0004) | |
152 | #define VETH_STATE_SENTMON (0x0008) | |
153 | #define VETH_STATE_SENTCAPS (0x0010) | |
154 | #define VETH_STATE_GOTCAPACK (0x0020) | |
155 | #define VETH_STATE_GOTCAPS (0x0040) | |
156 | #define VETH_STATE_SENTCAPACK (0x0080) | |
157 | #define VETH_STATE_READY (0x0100) | |
158 | ||
159 | struct veth_msg { | |
160 | struct veth_msg *next; | |
59f17aeb | 161 | struct veth_frames_data data; |
1da177e4 | 162 | int token; |
b08bd5c0 | 163 | int in_use; |
1da177e4 LT |
164 | struct sk_buff *skb; |
165 | struct device *dev; | |
166 | }; | |
167 | ||
168 | struct veth_lpar_connection { | |
169 | HvLpIndex remote_lp; | |
170 | struct work_struct statemachine_wq; | |
171 | struct veth_msg *msgs; | |
172 | int num_events; | |
59f17aeb | 173 | struct veth_cap_data local_caps; |
1da177e4 | 174 | |
f0c129ca | 175 | struct kobject kobject; |
1da177e4 LT |
176 | struct timer_list ack_timer; |
177 | ||
24562ffa ME |
178 | struct timer_list reset_timer; |
179 | unsigned int reset_timeout; | |
180 | unsigned long last_contact; | |
181 | int outstanding_tx; | |
182 | ||
1da177e4 LT |
183 | spinlock_t lock; |
184 | unsigned long state; | |
185 | HvLpInstanceId src_inst; | |
186 | HvLpInstanceId dst_inst; | |
59f17aeb | 187 | struct veth_lpevent cap_event, cap_ack_event; |
1da177e4 LT |
188 | u16 pending_acks[VETH_MAX_ACKS_PER_MSG]; |
189 | u32 num_pending_acks; | |
190 | ||
191 | int num_ack_events; | |
59f17aeb | 192 | struct veth_cap_data remote_caps; |
1da177e4 LT |
193 | u32 ack_timeout; |
194 | ||
1da177e4 LT |
195 | struct veth_msg *msg_stack_head; |
196 | }; | |
197 | ||
198 | struct veth_port { | |
199 | struct device *dev; | |
200 | struct net_device_stats stats; | |
201 | u64 mac_addr; | |
202 | HvLpIndexMap lpar_map; | |
203 | ||
e0808494 ME |
204 | /* queue_lock protects the stopped_map and dev's queue. */ |
205 | spinlock_t queue_lock; | |
206 | HvLpIndexMap stopped_map; | |
1da177e4 | 207 | |
e0808494 | 208 | /* mcast_gate protects promiscuous, num_mcast & mcast_addr. */ |
1da177e4 LT |
209 | rwlock_t mcast_gate; |
210 | int promiscuous; | |
1da177e4 LT |
211 | int num_mcast; |
212 | u64 mcast_addr[VETH_MAX_MCAST]; | |
07a5c172 ME |
213 | |
214 | struct kobject kobject; | |
1da177e4 LT |
215 | }; |
216 | ||
217 | static HvLpIndex this_lp; | |
218 | static struct veth_lpar_connection *veth_cnx[HVMAXARCHITECTEDLPS]; /* = 0 */ | |
219 | static struct net_device *veth_dev[HVMAXARCHITECTEDVIRTUALLANS]; /* = 0 */ | |
220 | ||
221 | static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev); | |
222 | static void veth_recycle_msg(struct veth_lpar_connection *, struct veth_msg *); | |
e0808494 ME |
223 | static void veth_wake_queues(struct veth_lpar_connection *cnx); |
224 | static void veth_stop_queues(struct veth_lpar_connection *cnx); | |
59f17aeb | 225 | static void veth_receive(struct veth_lpar_connection *, struct veth_lpevent *); |
f0c129ca | 226 | static void veth_release_connection(struct kobject *kobject); |
24562ffa ME |
227 | static void veth_timed_ack(unsigned long ptr); |
228 | static void veth_timed_reset(unsigned long ptr); | |
f0c129ca | 229 | |
1da177e4 LT |
230 | /* |
231 | * Utility functions | |
232 | */ | |
233 | ||
61a3c696 | 234 | #define veth_info(fmt, args...) \ |
ee05f031 | 235 | printk(KERN_INFO DRV_NAME ": " fmt, ## args) |
1da177e4 LT |
236 | |
237 | #define veth_error(fmt, args...) \ | |
ee05f031 | 238 | printk(KERN_ERR DRV_NAME ": Error: " fmt, ## args) |
61a3c696 ME |
239 | |
240 | #ifdef DEBUG | |
241 | #define veth_debug(fmt, args...) \ | |
ee05f031 | 242 | printk(KERN_DEBUG DRV_NAME ": " fmt, ## args) |
61a3c696 ME |
243 | #else |
244 | #define veth_debug(fmt, args...) do {} while (0) | |
245 | #endif | |
1da177e4 | 246 | |
d7893ddd | 247 | /* You must hold the connection's lock when you call this function. */ |
1da177e4 LT |
248 | static inline void veth_stack_push(struct veth_lpar_connection *cnx, |
249 | struct veth_msg *msg) | |
250 | { | |
1da177e4 LT |
251 | msg->next = cnx->msg_stack_head; |
252 | cnx->msg_stack_head = msg; | |
1da177e4 LT |
253 | } |
254 | ||
d7893ddd | 255 | /* You must hold the connection's lock when you call this function. */ |
1da177e4 LT |
256 | static inline struct veth_msg *veth_stack_pop(struct veth_lpar_connection *cnx) |
257 | { | |
1da177e4 LT |
258 | struct veth_msg *msg; |
259 | ||
1da177e4 LT |
260 | msg = cnx->msg_stack_head; |
261 | if (msg) | |
262 | cnx->msg_stack_head = cnx->msg_stack_head->next; | |
d7893ddd | 263 | |
1da177e4 LT |
264 | return msg; |
265 | } | |
266 | ||
e0808494 ME |
267 | /* You must hold the connection's lock when you call this function. */ |
268 | static inline int veth_stack_is_empty(struct veth_lpar_connection *cnx) | |
269 | { | |
270 | return cnx->msg_stack_head == NULL; | |
271 | } | |
272 | ||
1da177e4 LT |
273 | static inline HvLpEvent_Rc |
274 | veth_signalevent(struct veth_lpar_connection *cnx, u16 subtype, | |
275 | HvLpEvent_AckInd ackind, HvLpEvent_AckType acktype, | |
276 | u64 token, | |
277 | u64 data1, u64 data2, u64 data3, u64 data4, u64 data5) | |
278 | { | |
279 | return HvCallEvent_signalLpEventFast(cnx->remote_lp, | |
280 | HvLpEvent_Type_VirtualLan, | |
281 | subtype, ackind, acktype, | |
282 | cnx->src_inst, | |
283 | cnx->dst_inst, | |
284 | token, data1, data2, data3, | |
285 | data4, data5); | |
286 | } | |
287 | ||
288 | static inline HvLpEvent_Rc veth_signaldata(struct veth_lpar_connection *cnx, | |
289 | u16 subtype, u64 token, void *data) | |
290 | { | |
291 | u64 *p = (u64 *) data; | |
292 | ||
293 | return veth_signalevent(cnx, subtype, HvLpEvent_AckInd_NoAck, | |
294 | HvLpEvent_AckType_ImmediateAck, | |
295 | token, p[0], p[1], p[2], p[3], p[4]); | |
296 | } | |
297 | ||
298 | struct veth_allocation { | |
299 | struct completion c; | |
300 | int num; | |
301 | }; | |
302 | ||
303 | static void veth_complete_allocation(void *parm, int number) | |
304 | { | |
305 | struct veth_allocation *vc = (struct veth_allocation *)parm; | |
306 | ||
307 | vc->num = number; | |
308 | complete(&vc->c); | |
309 | } | |
310 | ||
311 | static int veth_allocate_events(HvLpIndex rlp, int number) | |
312 | { | |
313 | struct veth_allocation vc = { COMPLETION_INITIALIZER(vc.c), 0 }; | |
314 | ||
315 | mf_allocate_lp_events(rlp, HvLpEvent_Type_VirtualLan, | |
59f17aeb | 316 | sizeof(struct veth_lpevent), number, |
1da177e4 LT |
317 | &veth_complete_allocation, &vc); |
318 | wait_for_completion(&vc.c); | |
319 | ||
320 | return vc.num; | |
321 | } | |
322 | ||
76812d81 ME |
323 | /* |
324 | * sysfs support | |
325 | */ | |
326 | ||
327 | struct veth_cnx_attribute { | |
328 | struct attribute attr; | |
329 | ssize_t (*show)(struct veth_lpar_connection *, char *buf); | |
330 | ssize_t (*store)(struct veth_lpar_connection *, const char *buf); | |
331 | }; | |
332 | ||
333 | static ssize_t veth_cnx_attribute_show(struct kobject *kobj, | |
334 | struct attribute *attr, char *buf) | |
335 | { | |
336 | struct veth_cnx_attribute *cnx_attr; | |
337 | struct veth_lpar_connection *cnx; | |
338 | ||
339 | cnx_attr = container_of(attr, struct veth_cnx_attribute, attr); | |
340 | cnx = container_of(kobj, struct veth_lpar_connection, kobject); | |
341 | ||
342 | if (!cnx_attr->show) | |
343 | return -EIO; | |
344 | ||
345 | return cnx_attr->show(cnx, buf); | |
346 | } | |
347 | ||
348 | #define CUSTOM_CNX_ATTR(_name, _format, _expression) \ | |
349 | static ssize_t _name##_show(struct veth_lpar_connection *cnx, char *buf)\ | |
350 | { \ | |
351 | return sprintf(buf, _format, _expression); \ | |
352 | } \ | |
353 | struct veth_cnx_attribute veth_cnx_attr_##_name = __ATTR_RO(_name) | |
354 | ||
355 | #define SIMPLE_CNX_ATTR(_name) \ | |
356 | CUSTOM_CNX_ATTR(_name, "%lu\n", (unsigned long)cnx->_name) | |
357 | ||
358 | SIMPLE_CNX_ATTR(outstanding_tx); | |
359 | SIMPLE_CNX_ATTR(remote_lp); | |
360 | SIMPLE_CNX_ATTR(num_events); | |
361 | SIMPLE_CNX_ATTR(src_inst); | |
362 | SIMPLE_CNX_ATTR(dst_inst); | |
363 | SIMPLE_CNX_ATTR(num_pending_acks); | |
364 | SIMPLE_CNX_ATTR(num_ack_events); | |
365 | CUSTOM_CNX_ATTR(ack_timeout, "%d\n", jiffies_to_msecs(cnx->ack_timeout)); | |
366 | CUSTOM_CNX_ATTR(reset_timeout, "%d\n", jiffies_to_msecs(cnx->reset_timeout)); | |
367 | CUSTOM_CNX_ATTR(state, "0x%.4lX\n", cnx->state); | |
368 | CUSTOM_CNX_ATTR(last_contact, "%d\n", cnx->last_contact ? | |
369 | jiffies_to_msecs(jiffies - cnx->last_contact) : 0); | |
370 | ||
371 | #define GET_CNX_ATTR(_name) (&veth_cnx_attr_##_name.attr) | |
372 | ||
373 | static struct attribute *veth_cnx_default_attrs[] = { | |
374 | GET_CNX_ATTR(outstanding_tx), | |
375 | GET_CNX_ATTR(remote_lp), | |
376 | GET_CNX_ATTR(num_events), | |
377 | GET_CNX_ATTR(reset_timeout), | |
378 | GET_CNX_ATTR(last_contact), | |
379 | GET_CNX_ATTR(state), | |
380 | GET_CNX_ATTR(src_inst), | |
381 | GET_CNX_ATTR(dst_inst), | |
382 | GET_CNX_ATTR(num_pending_acks), | |
383 | GET_CNX_ATTR(num_ack_events), | |
384 | GET_CNX_ATTR(ack_timeout), | |
385 | NULL | |
386 | }; | |
387 | ||
388 | static struct sysfs_ops veth_cnx_sysfs_ops = { | |
389 | .show = veth_cnx_attribute_show | |
390 | }; | |
391 | ||
392 | static struct kobj_type veth_lpar_connection_ktype = { | |
393 | .release = veth_release_connection, | |
394 | .sysfs_ops = &veth_cnx_sysfs_ops, | |
395 | .default_attrs = veth_cnx_default_attrs | |
396 | }; | |
397 | ||
07a5c172 ME |
398 | struct veth_port_attribute { |
399 | struct attribute attr; | |
400 | ssize_t (*show)(struct veth_port *, char *buf); | |
401 | ssize_t (*store)(struct veth_port *, const char *buf); | |
402 | }; | |
403 | ||
404 | static ssize_t veth_port_attribute_show(struct kobject *kobj, | |
405 | struct attribute *attr, char *buf) | |
406 | { | |
407 | struct veth_port_attribute *port_attr; | |
408 | struct veth_port *port; | |
409 | ||
410 | port_attr = container_of(attr, struct veth_port_attribute, attr); | |
411 | port = container_of(kobj, struct veth_port, kobject); | |
412 | ||
413 | if (!port_attr->show) | |
414 | return -EIO; | |
415 | ||
416 | return port_attr->show(port, buf); | |
417 | } | |
418 | ||
419 | #define CUSTOM_PORT_ATTR(_name, _format, _expression) \ | |
420 | static ssize_t _name##_show(struct veth_port *port, char *buf) \ | |
421 | { \ | |
422 | return sprintf(buf, _format, _expression); \ | |
423 | } \ | |
424 | struct veth_port_attribute veth_port_attr_##_name = __ATTR_RO(_name) | |
425 | ||
426 | #define SIMPLE_PORT_ATTR(_name) \ | |
427 | CUSTOM_PORT_ATTR(_name, "%lu\n", (unsigned long)port->_name) | |
428 | ||
429 | SIMPLE_PORT_ATTR(promiscuous); | |
430 | SIMPLE_PORT_ATTR(num_mcast); | |
431 | CUSTOM_PORT_ATTR(lpar_map, "0x%X\n", port->lpar_map); | |
432 | CUSTOM_PORT_ATTR(stopped_map, "0x%X\n", port->stopped_map); | |
433 | CUSTOM_PORT_ATTR(mac_addr, "0x%lX\n", port->mac_addr); | |
434 | ||
435 | #define GET_PORT_ATTR(_name) (&veth_port_attr_##_name.attr) | |
436 | static struct attribute *veth_port_default_attrs[] = { | |
437 | GET_PORT_ATTR(mac_addr), | |
438 | GET_PORT_ATTR(lpar_map), | |
439 | GET_PORT_ATTR(stopped_map), | |
440 | GET_PORT_ATTR(promiscuous), | |
441 | GET_PORT_ATTR(num_mcast), | |
442 | NULL | |
443 | }; | |
444 | ||
445 | static struct sysfs_ops veth_port_sysfs_ops = { | |
446 | .show = veth_port_attribute_show | |
447 | }; | |
448 | ||
449 | static struct kobj_type veth_port_ktype = { | |
450 | .sysfs_ops = &veth_port_sysfs_ops, | |
451 | .default_attrs = veth_port_default_attrs | |
452 | }; | |
453 | ||
1da177e4 LT |
454 | /* |
455 | * LPAR connection code | |
456 | */ | |
457 | ||
458 | static inline void veth_kick_statemachine(struct veth_lpar_connection *cnx) | |
459 | { | |
460 | schedule_work(&cnx->statemachine_wq); | |
461 | } | |
462 | ||
463 | static void veth_take_cap(struct veth_lpar_connection *cnx, | |
59f17aeb | 464 | struct veth_lpevent *event) |
1da177e4 LT |
465 | { |
466 | unsigned long flags; | |
467 | ||
468 | spin_lock_irqsave(&cnx->lock, flags); | |
469 | /* Receiving caps may mean the other end has just come up, so | |
470 | * we need to reload the instance ID of the far end */ | |
471 | cnx->dst_inst = | |
472 | HvCallEvent_getTargetLpInstanceId(cnx->remote_lp, | |
473 | HvLpEvent_Type_VirtualLan); | |
474 | ||
475 | if (cnx->state & VETH_STATE_GOTCAPS) { | |
61a3c696 | 476 | veth_error("Received a second capabilities from LPAR %d.\n", |
1da177e4 LT |
477 | cnx->remote_lp); |
478 | event->base_event.xRc = HvLpEvent_Rc_BufferNotAvailable; | |
479 | HvCallEvent_ackLpEvent((struct HvLpEvent *) event); | |
480 | } else { | |
481 | memcpy(&cnx->cap_event, event, sizeof(cnx->cap_event)); | |
482 | cnx->state |= VETH_STATE_GOTCAPS; | |
483 | veth_kick_statemachine(cnx); | |
484 | } | |
485 | spin_unlock_irqrestore(&cnx->lock, flags); | |
486 | } | |
487 | ||
488 | static void veth_take_cap_ack(struct veth_lpar_connection *cnx, | |
59f17aeb | 489 | struct veth_lpevent *event) |
1da177e4 LT |
490 | { |
491 | unsigned long flags; | |
492 | ||
493 | spin_lock_irqsave(&cnx->lock, flags); | |
494 | if (cnx->state & VETH_STATE_GOTCAPACK) { | |
61a3c696 | 495 | veth_error("Received a second capabilities ack from LPAR %d.\n", |
1da177e4 LT |
496 | cnx->remote_lp); |
497 | } else { | |
498 | memcpy(&cnx->cap_ack_event, event, | |
499 | sizeof(&cnx->cap_ack_event)); | |
500 | cnx->state |= VETH_STATE_GOTCAPACK; | |
501 | veth_kick_statemachine(cnx); | |
502 | } | |
503 | spin_unlock_irqrestore(&cnx->lock, flags); | |
504 | } | |
505 | ||
506 | static void veth_take_monitor_ack(struct veth_lpar_connection *cnx, | |
59f17aeb | 507 | struct veth_lpevent *event) |
1da177e4 LT |
508 | { |
509 | unsigned long flags; | |
510 | ||
511 | spin_lock_irqsave(&cnx->lock, flags); | |
61a3c696 | 512 | veth_debug("cnx %d: lost connection.\n", cnx->remote_lp); |
58c5900b ME |
513 | |
514 | /* Avoid kicking the statemachine once we're shutdown. | |
515 | * It's unnecessary and it could break veth_stop_connection(). */ | |
516 | ||
517 | if (! (cnx->state & VETH_STATE_SHUTDOWN)) { | |
518 | cnx->state |= VETH_STATE_RESET; | |
519 | veth_kick_statemachine(cnx); | |
520 | } | |
1da177e4 LT |
521 | spin_unlock_irqrestore(&cnx->lock, flags); |
522 | } | |
523 | ||
59f17aeb | 524 | static void veth_handle_ack(struct veth_lpevent *event) |
1da177e4 LT |
525 | { |
526 | HvLpIndex rlp = event->base_event.xTargetLp; | |
527 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; | |
528 | ||
529 | BUG_ON(! cnx); | |
530 | ||
531 | switch (event->base_event.xSubtype) { | |
59f17aeb | 532 | case VETH_EVENT_CAP: |
1da177e4 LT |
533 | veth_take_cap_ack(cnx, event); |
534 | break; | |
59f17aeb | 535 | case VETH_EVENT_MONITOR: |
1da177e4 LT |
536 | veth_take_monitor_ack(cnx, event); |
537 | break; | |
538 | default: | |
61a3c696 ME |
539 | veth_error("Unknown ack type %d from LPAR %d.\n", |
540 | event->base_event.xSubtype, rlp); | |
1da177e4 LT |
541 | }; |
542 | } | |
543 | ||
59f17aeb | 544 | static void veth_handle_int(struct veth_lpevent *event) |
1da177e4 LT |
545 | { |
546 | HvLpIndex rlp = event->base_event.xSourceLp; | |
547 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; | |
548 | unsigned long flags; | |
24562ffa | 549 | int i, acked = 0; |
1da177e4 LT |
550 | |
551 | BUG_ON(! cnx); | |
552 | ||
553 | switch (event->base_event.xSubtype) { | |
59f17aeb | 554 | case VETH_EVENT_CAP: |
1da177e4 LT |
555 | veth_take_cap(cnx, event); |
556 | break; | |
59f17aeb | 557 | case VETH_EVENT_MONITOR: |
1da177e4 LT |
558 | /* do nothing... this'll hang out here til we're dead, |
559 | * and the hypervisor will return it for us. */ | |
560 | break; | |
59f17aeb | 561 | case VETH_EVENT_FRAMES_ACK: |
1da177e4 | 562 | spin_lock_irqsave(&cnx->lock, flags); |
24562ffa | 563 | |
1da177e4 LT |
564 | for (i = 0; i < VETH_MAX_ACKS_PER_MSG; ++i) { |
565 | u16 msgnum = event->u.frames_ack_data.token[i]; | |
566 | ||
24562ffa | 567 | if (msgnum < VETH_NUMBUFFERS) { |
1da177e4 | 568 | veth_recycle_msg(cnx, cnx->msgs + msgnum); |
24562ffa ME |
569 | cnx->outstanding_tx--; |
570 | acked++; | |
571 | } | |
1da177e4 | 572 | } |
24562ffa | 573 | |
e0808494 | 574 | if (acked > 0) { |
24562ffa | 575 | cnx->last_contact = jiffies; |
e0808494 ME |
576 | veth_wake_queues(cnx); |
577 | } | |
24562ffa | 578 | |
1da177e4 | 579 | spin_unlock_irqrestore(&cnx->lock, flags); |
1da177e4 | 580 | break; |
59f17aeb | 581 | case VETH_EVENT_FRAMES: |
1da177e4 LT |
582 | veth_receive(cnx, event); |
583 | break; | |
584 | default: | |
61a3c696 ME |
585 | veth_error("Unknown interrupt type %d from LPAR %d.\n", |
586 | event->base_event.xSubtype, rlp); | |
1da177e4 LT |
587 | }; |
588 | } | |
589 | ||
590 | static void veth_handle_event(struct HvLpEvent *event, struct pt_regs *regs) | |
591 | { | |
59f17aeb | 592 | struct veth_lpevent *veth_event = (struct veth_lpevent *)event; |
1da177e4 LT |
593 | |
594 | if (event->xFlags.xFunction == HvLpEvent_Function_Ack) | |
595 | veth_handle_ack(veth_event); | |
596 | else if (event->xFlags.xFunction == HvLpEvent_Function_Int) | |
597 | veth_handle_int(veth_event); | |
598 | } | |
599 | ||
600 | static int veth_process_caps(struct veth_lpar_connection *cnx) | |
601 | { | |
59f17aeb | 602 | struct veth_cap_data *remote_caps = &cnx->remote_caps; |
1da177e4 LT |
603 | int num_acks_needed; |
604 | ||
605 | /* Convert timer to jiffies */ | |
606 | cnx->ack_timeout = remote_caps->ack_timeout * HZ / 1000000; | |
607 | ||
608 | if ( (remote_caps->num_buffers == 0) | |
609 | || (remote_caps->ack_threshold > VETH_MAX_ACKS_PER_MSG) | |
610 | || (remote_caps->ack_threshold == 0) | |
611 | || (cnx->ack_timeout == 0) ) { | |
61a3c696 ME |
612 | veth_error("Received incompatible capabilities from LPAR %d.\n", |
613 | cnx->remote_lp); | |
1da177e4 LT |
614 | return HvLpEvent_Rc_InvalidSubtypeData; |
615 | } | |
616 | ||
617 | num_acks_needed = (remote_caps->num_buffers | |
618 | / remote_caps->ack_threshold) + 1; | |
619 | ||
620 | /* FIXME: locking on num_ack_events? */ | |
621 | if (cnx->num_ack_events < num_acks_needed) { | |
622 | int num; | |
623 | ||
624 | num = veth_allocate_events(cnx->remote_lp, | |
625 | num_acks_needed-cnx->num_ack_events); | |
626 | if (num > 0) | |
627 | cnx->num_ack_events += num; | |
628 | ||
629 | if (cnx->num_ack_events < num_acks_needed) { | |
61a3c696 ME |
630 | veth_error("Couldn't allocate enough ack events " |
631 | "for LPAR %d.\n", cnx->remote_lp); | |
1da177e4 LT |
632 | |
633 | return HvLpEvent_Rc_BufferNotAvailable; | |
634 | } | |
635 | } | |
636 | ||
637 | ||
638 | return HvLpEvent_Rc_Good; | |
639 | } | |
640 | ||
641 | /* FIXME: The gotos here are a bit dubious */ | |
642 | static void veth_statemachine(void *p) | |
643 | { | |
644 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)p; | |
645 | int rlp = cnx->remote_lp; | |
646 | int rc; | |
647 | ||
648 | spin_lock_irq(&cnx->lock); | |
649 | ||
650 | restart: | |
651 | if (cnx->state & VETH_STATE_RESET) { | |
1da177e4 LT |
652 | if (cnx->state & VETH_STATE_OPEN) |
653 | HvCallEvent_closeLpEventPath(cnx->remote_lp, | |
654 | HvLpEvent_Type_VirtualLan); | |
655 | ||
abfda471 ME |
656 | /* |
657 | * Reset ack data. This prevents the ack_timer actually | |
658 | * doing anything, even if it runs one more time when | |
659 | * we drop the lock below. | |
660 | */ | |
1da177e4 LT |
661 | memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks)); |
662 | cnx->num_pending_acks = 0; | |
663 | ||
664 | cnx->state &= ~(VETH_STATE_RESET | VETH_STATE_SENTMON | |
665 | | VETH_STATE_OPEN | VETH_STATE_SENTCAPS | |
666 | | VETH_STATE_GOTCAPACK | VETH_STATE_GOTCAPS | |
667 | | VETH_STATE_SENTCAPACK | VETH_STATE_READY); | |
668 | ||
669 | /* Clean up any leftover messages */ | |
24562ffa ME |
670 | if (cnx->msgs) { |
671 | int i; | |
1da177e4 LT |
672 | for (i = 0; i < VETH_NUMBUFFERS; ++i) |
673 | veth_recycle_msg(cnx, cnx->msgs + i); | |
24562ffa | 674 | } |
e0808494 | 675 | |
24562ffa | 676 | cnx->outstanding_tx = 0; |
e0808494 | 677 | veth_wake_queues(cnx); |
abfda471 ME |
678 | |
679 | /* Drop the lock so we can do stuff that might sleep or | |
680 | * take other locks. */ | |
1da177e4 | 681 | spin_unlock_irq(&cnx->lock); |
abfda471 ME |
682 | |
683 | del_timer_sync(&cnx->ack_timer); | |
24562ffa ME |
684 | del_timer_sync(&cnx->reset_timer); |
685 | ||
1da177e4 | 686 | spin_lock_irq(&cnx->lock); |
abfda471 | 687 | |
1da177e4 LT |
688 | if (cnx->state & VETH_STATE_RESET) |
689 | goto restart; | |
58c5900b ME |
690 | |
691 | /* Hack, wait for the other end to reset itself. */ | |
692 | if (! (cnx->state & VETH_STATE_SHUTDOWN)) { | |
693 | schedule_delayed_work(&cnx->statemachine_wq, 5 * HZ); | |
694 | goto out; | |
695 | } | |
1da177e4 LT |
696 | } |
697 | ||
698 | if (cnx->state & VETH_STATE_SHUTDOWN) | |
699 | /* It's all over, do nothing */ | |
700 | goto out; | |
701 | ||
702 | if ( !(cnx->state & VETH_STATE_OPEN) ) { | |
703 | if (! cnx->msgs || (cnx->num_events < (2 + VETH_NUMBUFFERS)) ) | |
704 | goto cant_cope; | |
705 | ||
706 | HvCallEvent_openLpEventPath(rlp, HvLpEvent_Type_VirtualLan); | |
707 | cnx->src_inst = | |
708 | HvCallEvent_getSourceLpInstanceId(rlp, | |
709 | HvLpEvent_Type_VirtualLan); | |
710 | cnx->dst_inst = | |
711 | HvCallEvent_getTargetLpInstanceId(rlp, | |
712 | HvLpEvent_Type_VirtualLan); | |
713 | cnx->state |= VETH_STATE_OPEN; | |
714 | } | |
715 | ||
716 | if ( (cnx->state & VETH_STATE_OPEN) | |
717 | && !(cnx->state & VETH_STATE_SENTMON) ) { | |
59f17aeb | 718 | rc = veth_signalevent(cnx, VETH_EVENT_MONITOR, |
1da177e4 LT |
719 | HvLpEvent_AckInd_DoAck, |
720 | HvLpEvent_AckType_DeferredAck, | |
721 | 0, 0, 0, 0, 0, 0); | |
722 | ||
723 | if (rc == HvLpEvent_Rc_Good) { | |
724 | cnx->state |= VETH_STATE_SENTMON; | |
725 | } else { | |
726 | if ( (rc != HvLpEvent_Rc_PartitionDead) | |
727 | && (rc != HvLpEvent_Rc_PathClosed) ) | |
61a3c696 ME |
728 | veth_error("Error sending monitor to LPAR %d, " |
729 | "rc = %d\n", rlp, rc); | |
1da177e4 LT |
730 | |
731 | /* Oh well, hope we get a cap from the other | |
732 | * end and do better when that kicks us */ | |
733 | goto out; | |
734 | } | |
735 | } | |
736 | ||
737 | if ( (cnx->state & VETH_STATE_OPEN) | |
738 | && !(cnx->state & VETH_STATE_SENTCAPS)) { | |
739 | u64 *rawcap = (u64 *)&cnx->local_caps; | |
740 | ||
59f17aeb | 741 | rc = veth_signalevent(cnx, VETH_EVENT_CAP, |
1da177e4 LT |
742 | HvLpEvent_AckInd_DoAck, |
743 | HvLpEvent_AckType_ImmediateAck, | |
744 | 0, rawcap[0], rawcap[1], rawcap[2], | |
745 | rawcap[3], rawcap[4]); | |
746 | ||
747 | if (rc == HvLpEvent_Rc_Good) { | |
748 | cnx->state |= VETH_STATE_SENTCAPS; | |
749 | } else { | |
750 | if ( (rc != HvLpEvent_Rc_PartitionDead) | |
751 | && (rc != HvLpEvent_Rc_PathClosed) ) | |
61a3c696 ME |
752 | veth_error("Error sending caps to LPAR %d, " |
753 | "rc = %d\n", rlp, rc); | |
754 | ||
1da177e4 LT |
755 | /* Oh well, hope we get a cap from the other |
756 | * end and do better when that kicks us */ | |
757 | goto out; | |
758 | } | |
759 | } | |
760 | ||
761 | if ((cnx->state & VETH_STATE_GOTCAPS) | |
762 | && !(cnx->state & VETH_STATE_SENTCAPACK)) { | |
59f17aeb | 763 | struct veth_cap_data *remote_caps = &cnx->remote_caps; |
1da177e4 LT |
764 | |
765 | memcpy(remote_caps, &cnx->cap_event.u.caps_data, | |
766 | sizeof(*remote_caps)); | |
767 | ||
768 | spin_unlock_irq(&cnx->lock); | |
769 | rc = veth_process_caps(cnx); | |
770 | spin_lock_irq(&cnx->lock); | |
771 | ||
772 | /* We dropped the lock, so recheck for anything which | |
773 | * might mess us up */ | |
774 | if (cnx->state & (VETH_STATE_RESET|VETH_STATE_SHUTDOWN)) | |
775 | goto restart; | |
776 | ||
777 | cnx->cap_event.base_event.xRc = rc; | |
778 | HvCallEvent_ackLpEvent((struct HvLpEvent *)&cnx->cap_event); | |
779 | if (rc == HvLpEvent_Rc_Good) | |
780 | cnx->state |= VETH_STATE_SENTCAPACK; | |
781 | else | |
782 | goto cant_cope; | |
783 | } | |
784 | ||
785 | if ((cnx->state & VETH_STATE_GOTCAPACK) | |
786 | && (cnx->state & VETH_STATE_GOTCAPS) | |
787 | && !(cnx->state & VETH_STATE_READY)) { | |
788 | if (cnx->cap_ack_event.base_event.xRc == HvLpEvent_Rc_Good) { | |
789 | /* Start the ACK timer */ | |
790 | cnx->ack_timer.expires = jiffies + cnx->ack_timeout; | |
791 | add_timer(&cnx->ack_timer); | |
792 | cnx->state |= VETH_STATE_READY; | |
793 | } else { | |
61a3c696 ME |
794 | veth_error("Caps rejected by LPAR %d, rc = %d\n", |
795 | rlp, cnx->cap_ack_event.base_event.xRc); | |
1da177e4 LT |
796 | goto cant_cope; |
797 | } | |
798 | } | |
799 | ||
800 | out: | |
801 | spin_unlock_irq(&cnx->lock); | |
802 | return; | |
803 | ||
804 | cant_cope: | |
805 | /* FIXME: we get here if something happens we really can't | |
806 | * cope with. The link will never work once we get here, and | |
807 | * all we can do is not lock the rest of the system up */ | |
61a3c696 ME |
808 | veth_error("Unrecoverable error on connection to LPAR %d, shutting down" |
809 | " (state = 0x%04lx)\n", rlp, cnx->state); | |
1da177e4 LT |
810 | cnx->state |= VETH_STATE_SHUTDOWN; |
811 | spin_unlock_irq(&cnx->lock); | |
812 | } | |
813 | ||
814 | static int veth_init_connection(u8 rlp) | |
815 | { | |
816 | struct veth_lpar_connection *cnx; | |
817 | struct veth_msg *msgs; | |
f0c129ca | 818 | int i, rc; |
1da177e4 LT |
819 | |
820 | if ( (rlp == this_lp) | |
821 | || ! HvLpConfig_doLpsCommunicateOnVirtualLan(this_lp, rlp) ) | |
822 | return 0; | |
823 | ||
824 | cnx = kmalloc(sizeof(*cnx), GFP_KERNEL); | |
825 | if (! cnx) | |
826 | return -ENOMEM; | |
827 | memset(cnx, 0, sizeof(*cnx)); | |
828 | ||
829 | cnx->remote_lp = rlp; | |
830 | spin_lock_init(&cnx->lock); | |
831 | INIT_WORK(&cnx->statemachine_wq, veth_statemachine, cnx); | |
24562ffa | 832 | |
1da177e4 LT |
833 | init_timer(&cnx->ack_timer); |
834 | cnx->ack_timer.function = veth_timed_ack; | |
835 | cnx->ack_timer.data = (unsigned long) cnx; | |
24562ffa ME |
836 | |
837 | init_timer(&cnx->reset_timer); | |
838 | cnx->reset_timer.function = veth_timed_reset; | |
839 | cnx->reset_timer.data = (unsigned long) cnx; | |
840 | cnx->reset_timeout = 5 * HZ * (VETH_ACKTIMEOUT / 1000000); | |
841 | ||
1da177e4 LT |
842 | memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks)); |
843 | ||
844 | veth_cnx[rlp] = cnx; | |
845 | ||
f0c129ca ME |
846 | /* This gets us 1 reference, which is held on behalf of the driver |
847 | * infrastructure. It's released at module unload. */ | |
848 | kobject_init(&cnx->kobject); | |
849 | cnx->kobject.ktype = &veth_lpar_connection_ktype; | |
850 | rc = kobject_set_name(&cnx->kobject, "cnx%.2d", rlp); | |
851 | if (rc != 0) | |
852 | return rc; | |
853 | ||
1da177e4 LT |
854 | msgs = kmalloc(VETH_NUMBUFFERS * sizeof(struct veth_msg), GFP_KERNEL); |
855 | if (! msgs) { | |
61a3c696 | 856 | veth_error("Can't allocate buffers for LPAR %d.\n", rlp); |
1da177e4 LT |
857 | return -ENOMEM; |
858 | } | |
859 | ||
860 | cnx->msgs = msgs; | |
861 | memset(msgs, 0, VETH_NUMBUFFERS * sizeof(struct veth_msg)); | |
1da177e4 LT |
862 | |
863 | for (i = 0; i < VETH_NUMBUFFERS; i++) { | |
864 | msgs[i].token = i; | |
865 | veth_stack_push(cnx, msgs + i); | |
866 | } | |
867 | ||
868 | cnx->num_events = veth_allocate_events(rlp, 2 + VETH_NUMBUFFERS); | |
869 | ||
870 | if (cnx->num_events < (2 + VETH_NUMBUFFERS)) { | |
61a3c696 | 871 | veth_error("Can't allocate enough events for LPAR %d.\n", rlp); |
1da177e4 LT |
872 | return -ENOMEM; |
873 | } | |
874 | ||
875 | cnx->local_caps.num_buffers = VETH_NUMBUFFERS; | |
876 | cnx->local_caps.ack_threshold = ACK_THRESHOLD; | |
877 | cnx->local_caps.ack_timeout = VETH_ACKTIMEOUT; | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
f0c129ca | 882 | static void veth_stop_connection(struct veth_lpar_connection *cnx) |
1da177e4 | 883 | { |
f0c129ca | 884 | if (!cnx) |
1da177e4 LT |
885 | return; |
886 | ||
887 | spin_lock_irq(&cnx->lock); | |
888 | cnx->state |= VETH_STATE_RESET | VETH_STATE_SHUTDOWN; | |
889 | veth_kick_statemachine(cnx); | |
890 | spin_unlock_irq(&cnx->lock); | |
891 | ||
58c5900b ME |
892 | /* There's a slim chance the reset code has just queued the |
893 | * statemachine to run in five seconds. If so we need to cancel | |
894 | * that and requeue the work to run now. */ | |
895 | if (cancel_delayed_work(&cnx->statemachine_wq)) { | |
896 | spin_lock_irq(&cnx->lock); | |
897 | veth_kick_statemachine(cnx); | |
898 | spin_unlock_irq(&cnx->lock); | |
899 | } | |
900 | ||
abfda471 | 901 | /* Wait for the state machine to run. */ |
1da177e4 | 902 | flush_scheduled_work(); |
ec60beeb ME |
903 | } |
904 | ||
f0c129ca | 905 | static void veth_destroy_connection(struct veth_lpar_connection *cnx) |
ec60beeb | 906 | { |
f0c129ca | 907 | if (!cnx) |
ec60beeb | 908 | return; |
1da177e4 | 909 | |
1da177e4 LT |
910 | if (cnx->num_events > 0) |
911 | mf_deallocate_lp_events(cnx->remote_lp, | |
912 | HvLpEvent_Type_VirtualLan, | |
913 | cnx->num_events, | |
914 | NULL, NULL); | |
915 | if (cnx->num_ack_events > 0) | |
916 | mf_deallocate_lp_events(cnx->remote_lp, | |
917 | HvLpEvent_Type_VirtualLan, | |
918 | cnx->num_ack_events, | |
919 | NULL, NULL); | |
1da177e4 LT |
920 | |
921 | kfree(cnx->msgs); | |
f0c129ca | 922 | veth_cnx[cnx->remote_lp] = NULL; |
1da177e4 | 923 | kfree(cnx); |
f0c129ca ME |
924 | } |
925 | ||
926 | static void veth_release_connection(struct kobject *kobj) | |
927 | { | |
928 | struct veth_lpar_connection *cnx; | |
929 | cnx = container_of(kobj, struct veth_lpar_connection, kobject); | |
930 | veth_stop_connection(cnx); | |
931 | veth_destroy_connection(cnx); | |
1da177e4 LT |
932 | } |
933 | ||
934 | /* | |
935 | * net_device code | |
936 | */ | |
937 | ||
938 | static int veth_open(struct net_device *dev) | |
939 | { | |
940 | struct veth_port *port = (struct veth_port *) dev->priv; | |
941 | ||
942 | memset(&port->stats, 0, sizeof (port->stats)); | |
943 | netif_start_queue(dev); | |
944 | return 0; | |
945 | } | |
946 | ||
947 | static int veth_close(struct net_device *dev) | |
948 | { | |
949 | netif_stop_queue(dev); | |
950 | return 0; | |
951 | } | |
952 | ||
953 | static struct net_device_stats *veth_get_stats(struct net_device *dev) | |
954 | { | |
955 | struct veth_port *port = (struct veth_port *) dev->priv; | |
956 | ||
957 | return &port->stats; | |
958 | } | |
959 | ||
960 | static int veth_change_mtu(struct net_device *dev, int new_mtu) | |
961 | { | |
962 | if ((new_mtu < 68) || (new_mtu > VETH_MAX_MTU)) | |
963 | return -EINVAL; | |
964 | dev->mtu = new_mtu; | |
965 | return 0; | |
966 | } | |
967 | ||
968 | static void veth_set_multicast_list(struct net_device *dev) | |
969 | { | |
970 | struct veth_port *port = (struct veth_port *) dev->priv; | |
971 | unsigned long flags; | |
972 | ||
973 | write_lock_irqsave(&port->mcast_gate, flags); | |
974 | ||
2a5391a1 ME |
975 | if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) || |
976 | (dev->mc_count > VETH_MAX_MCAST)) { | |
1da177e4 | 977 | port->promiscuous = 1; |
1da177e4 LT |
978 | } else { |
979 | struct dev_mc_list *dmi = dev->mc_list; | |
980 | int i; | |
981 | ||
2a5391a1 ME |
982 | port->promiscuous = 0; |
983 | ||
1da177e4 LT |
984 | /* Update table */ |
985 | port->num_mcast = 0; | |
986 | ||
987 | for (i = 0; i < dev->mc_count; i++) { | |
988 | u8 *addr = dmi->dmi_addr; | |
989 | u64 xaddr = 0; | |
990 | ||
991 | if (addr[0] & 0x01) {/* multicast address? */ | |
992 | memcpy(&xaddr, addr, ETH_ALEN); | |
993 | port->mcast_addr[port->num_mcast] = xaddr; | |
994 | port->num_mcast++; | |
995 | } | |
996 | dmi = dmi->next; | |
997 | } | |
998 | } | |
999 | ||
1000 | write_unlock_irqrestore(&port->mcast_gate, flags); | |
1001 | } | |
1002 | ||
1003 | static void veth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
1004 | { | |
ee05f031 | 1005 | strncpy(info->driver, DRV_NAME, sizeof(info->driver) - 1); |
1da177e4 | 1006 | info->driver[sizeof(info->driver) - 1] = '\0'; |
ee05f031 ME |
1007 | strncpy(info->version, DRV_VERSION, sizeof(info->version) - 1); |
1008 | info->version[sizeof(info->version) - 1] = '\0'; | |
1da177e4 LT |
1009 | } |
1010 | ||
1011 | static int veth_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) | |
1012 | { | |
1013 | ecmd->supported = (SUPPORTED_1000baseT_Full | |
1014 | | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
1015 | ecmd->advertising = (SUPPORTED_1000baseT_Full | |
1016 | | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
1017 | ecmd->port = PORT_FIBRE; | |
1018 | ecmd->transceiver = XCVR_INTERNAL; | |
1019 | ecmd->phy_address = 0; | |
1020 | ecmd->speed = SPEED_1000; | |
1021 | ecmd->duplex = DUPLEX_FULL; | |
1022 | ecmd->autoneg = AUTONEG_ENABLE; | |
1023 | ecmd->maxtxpkt = 120; | |
1024 | ecmd->maxrxpkt = 120; | |
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | static u32 veth_get_link(struct net_device *dev) | |
1029 | { | |
1030 | return 1; | |
1031 | } | |
1032 | ||
1033 | static struct ethtool_ops ops = { | |
1034 | .get_drvinfo = veth_get_drvinfo, | |
1035 | .get_settings = veth_get_settings, | |
1036 | .get_link = veth_get_link, | |
1037 | }; | |
1038 | ||
1da177e4 LT |
1039 | static struct net_device * __init veth_probe_one(int vlan, struct device *vdev) |
1040 | { | |
1041 | struct net_device *dev; | |
1042 | struct veth_port *port; | |
1043 | int i, rc; | |
1044 | ||
1045 | dev = alloc_etherdev(sizeof (struct veth_port)); | |
1046 | if (! dev) { | |
1047 | veth_error("Unable to allocate net_device structure!\n"); | |
1048 | return NULL; | |
1049 | } | |
1050 | ||
1051 | port = (struct veth_port *) dev->priv; | |
1052 | ||
e0808494 | 1053 | spin_lock_init(&port->queue_lock); |
1da177e4 | 1054 | rwlock_init(&port->mcast_gate); |
e0808494 | 1055 | port->stopped_map = 0; |
1da177e4 LT |
1056 | |
1057 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1058 | HvLpVirtualLanIndexMap map; | |
1059 | ||
1060 | if (i == this_lp) | |
1061 | continue; | |
1062 | map = HvLpConfig_getVirtualLanIndexMapForLp(i); | |
1063 | if (map & (0x8000 >> vlan)) | |
1064 | port->lpar_map |= (1 << i); | |
1065 | } | |
1066 | port->dev = vdev; | |
1067 | ||
1068 | dev->dev_addr[0] = 0x02; | |
1069 | dev->dev_addr[1] = 0x01; | |
1070 | dev->dev_addr[2] = 0xff; | |
1071 | dev->dev_addr[3] = vlan; | |
1072 | dev->dev_addr[4] = 0xff; | |
1073 | dev->dev_addr[5] = this_lp; | |
1074 | ||
1075 | dev->mtu = VETH_MAX_MTU; | |
1076 | ||
1077 | memcpy(&port->mac_addr, dev->dev_addr, 6); | |
1078 | ||
1079 | dev->open = veth_open; | |
1080 | dev->hard_start_xmit = veth_start_xmit; | |
1081 | dev->stop = veth_close; | |
1082 | dev->get_stats = veth_get_stats; | |
1083 | dev->change_mtu = veth_change_mtu; | |
1084 | dev->set_mac_address = NULL; | |
1085 | dev->set_multicast_list = veth_set_multicast_list; | |
1086 | SET_ETHTOOL_OPS(dev, &ops); | |
1087 | ||
1da177e4 LT |
1088 | SET_NETDEV_DEV(dev, vdev); |
1089 | ||
1090 | rc = register_netdev(dev); | |
1091 | if (rc != 0) { | |
61a3c696 | 1092 | veth_error("Failed registering net device for vlan%d.\n", vlan); |
1da177e4 LT |
1093 | free_netdev(dev); |
1094 | return NULL; | |
1095 | } | |
1096 | ||
07a5c172 ME |
1097 | kobject_init(&port->kobject); |
1098 | port->kobject.parent = &dev->class_dev.kobj; | |
1099 | port->kobject.ktype = &veth_port_ktype; | |
1100 | kobject_set_name(&port->kobject, "veth_port"); | |
1101 | if (0 != kobject_add(&port->kobject)) | |
1102 | veth_error("Failed adding port for %s to sysfs.\n", dev->name); | |
1103 | ||
61a3c696 ME |
1104 | veth_info("%s attached to iSeries vlan %d (LPAR map = 0x%.4X)\n", |
1105 | dev->name, vlan, port->lpar_map); | |
1da177e4 LT |
1106 | |
1107 | return dev; | |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * Tx path | |
1112 | */ | |
1113 | ||
1114 | static int veth_transmit_to_one(struct sk_buff *skb, HvLpIndex rlp, | |
1115 | struct net_device *dev) | |
1116 | { | |
1117 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; | |
1118 | struct veth_port *port = (struct veth_port *) dev->priv; | |
1119 | HvLpEvent_Rc rc; | |
1da177e4 | 1120 | struct veth_msg *msg = NULL; |
1da177e4 LT |
1121 | unsigned long flags; |
1122 | ||
db5e8718 | 1123 | if (! cnx) |
1da177e4 | 1124 | return 0; |
1da177e4 LT |
1125 | |
1126 | spin_lock_irqsave(&cnx->lock, flags); | |
1127 | ||
f27eff1f | 1128 | if (! (cnx->state & VETH_STATE_READY)) |
db5e8718 | 1129 | goto no_error; |
1da177e4 | 1130 | |
db5e8718 | 1131 | if ((skb->len - ETH_HLEN) > VETH_MAX_MTU) |
1da177e4 LT |
1132 | goto drop; |
1133 | ||
1134 | msg = veth_stack_pop(cnx); | |
db5e8718 | 1135 | if (! msg) |
1da177e4 | 1136 | goto drop; |
1da177e4 | 1137 | |
b08bd5c0 | 1138 | msg->in_use = 1; |
db5e8718 | 1139 | msg->skb = skb_get(skb); |
b08bd5c0 | 1140 | |
cbf9074c ME |
1141 | msg->data.addr[0] = dma_map_single(port->dev, skb->data, |
1142 | skb->len, DMA_TO_DEVICE); | |
1da177e4 | 1143 | |
cbf9074c | 1144 | if (dma_mapping_error(msg->data.addr[0])) |
1da177e4 LT |
1145 | goto recycle_and_drop; |
1146 | ||
1da177e4 | 1147 | msg->dev = port->dev; |
cbf9074c | 1148 | msg->data.len[0] = skb->len; |
1da177e4 | 1149 | msg->data.eofmask = 1 << VETH_EOF_SHIFT; |
cbf9074c | 1150 | |
59f17aeb | 1151 | rc = veth_signaldata(cnx, VETH_EVENT_FRAMES, msg->token, &msg->data); |
1da177e4 LT |
1152 | |
1153 | if (rc != HvLpEvent_Rc_Good) | |
1154 | goto recycle_and_drop; | |
1155 | ||
24562ffa ME |
1156 | /* If the timer's not already running, start it now. */ |
1157 | if (0 == cnx->outstanding_tx) | |
1158 | mod_timer(&cnx->reset_timer, jiffies + cnx->reset_timeout); | |
1159 | ||
1160 | cnx->last_contact = jiffies; | |
1161 | cnx->outstanding_tx++; | |
1162 | ||
e0808494 ME |
1163 | if (veth_stack_is_empty(cnx)) |
1164 | veth_stop_queues(cnx); | |
1165 | ||
db5e8718 | 1166 | no_error: |
1da177e4 LT |
1167 | spin_unlock_irqrestore(&cnx->lock, flags); |
1168 | return 0; | |
1169 | ||
1170 | recycle_and_drop: | |
1da177e4 LT |
1171 | veth_recycle_msg(cnx, msg); |
1172 | drop: | |
1da177e4 | 1173 | spin_unlock_irqrestore(&cnx->lock, flags); |
db5e8718 | 1174 | return 1; |
1da177e4 LT |
1175 | } |
1176 | ||
db5e8718 | 1177 | static void veth_transmit_to_many(struct sk_buff *skb, |
1da177e4 LT |
1178 | HvLpIndexMap lpmask, |
1179 | struct net_device *dev) | |
1180 | { | |
1181 | struct veth_port *port = (struct veth_port *) dev->priv; | |
db5e8718 ME |
1182 | int i, success, error; |
1183 | ||
1184 | success = error = 0; | |
1da177e4 LT |
1185 | |
1186 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1187 | if ((lpmask & (1 << i)) == 0) | |
1188 | continue; | |
1189 | ||
db5e8718 ME |
1190 | if (veth_transmit_to_one(skb, i, dev)) |
1191 | error = 1; | |
1192 | else | |
1193 | success = 1; | |
1da177e4 LT |
1194 | } |
1195 | ||
db5e8718 ME |
1196 | if (error) |
1197 | port->stats.tx_errors++; | |
1198 | ||
1199 | if (success) { | |
1da177e4 LT |
1200 | port->stats.tx_packets++; |
1201 | port->stats.tx_bytes += skb->len; | |
1202 | } | |
1da177e4 LT |
1203 | } |
1204 | ||
1205 | static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1206 | { | |
1207 | unsigned char *frame = skb->data; | |
1208 | struct veth_port *port = (struct veth_port *) dev->priv; | |
1da177e4 LT |
1209 | HvLpIndexMap lpmask; |
1210 | ||
1211 | if (! (frame[0] & 0x01)) { | |
1212 | /* unicast packet */ | |
1213 | HvLpIndex rlp = frame[5]; | |
1214 | ||
1215 | if ( ! ((1 << rlp) & port->lpar_map) ) { | |
1216 | dev_kfree_skb(skb); | |
1217 | return 0; | |
1218 | } | |
1219 | ||
1220 | lpmask = 1 << rlp; | |
1221 | } else { | |
1222 | lpmask = port->lpar_map; | |
1223 | } | |
1224 | ||
e0808494 | 1225 | veth_transmit_to_many(skb, lpmask, dev); |
1da177e4 | 1226 | |
e0808494 | 1227 | dev_kfree_skb(skb); |
1da177e4 LT |
1228 | |
1229 | return 0; | |
1230 | } | |
1231 | ||
b08bd5c0 | 1232 | /* You must hold the connection's lock when you call this function. */ |
1da177e4 LT |
1233 | static void veth_recycle_msg(struct veth_lpar_connection *cnx, |
1234 | struct veth_msg *msg) | |
1235 | { | |
1236 | u32 dma_address, dma_length; | |
1237 | ||
b08bd5c0 ME |
1238 | if (msg->in_use) { |
1239 | msg->in_use = 0; | |
1da177e4 LT |
1240 | dma_address = msg->data.addr[0]; |
1241 | dma_length = msg->data.len[0]; | |
1242 | ||
cbf9074c ME |
1243 | if (!dma_mapping_error(dma_address)) |
1244 | dma_unmap_single(msg->dev, dma_address, dma_length, | |
1245 | DMA_TO_DEVICE); | |
1da177e4 LT |
1246 | |
1247 | if (msg->skb) { | |
1248 | dev_kfree_skb_any(msg->skb); | |
1249 | msg->skb = NULL; | |
1250 | } | |
1251 | ||
1252 | memset(&msg->data, 0, sizeof(msg->data)); | |
1253 | veth_stack_push(cnx, msg); | |
61a3c696 ME |
1254 | } else if (cnx->state & VETH_STATE_OPEN) { |
1255 | veth_error("Non-pending frame (# %d) acked by LPAR %d.\n", | |
1256 | cnx->remote_lp, msg->token); | |
1257 | } | |
1da177e4 LT |
1258 | } |
1259 | ||
e0808494 | 1260 | static void veth_wake_queues(struct veth_lpar_connection *cnx) |
1da177e4 LT |
1261 | { |
1262 | int i; | |
e0808494 | 1263 | |
1da177e4 LT |
1264 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) { |
1265 | struct net_device *dev = veth_dev[i]; | |
1266 | struct veth_port *port; | |
1267 | unsigned long flags; | |
1268 | ||
1269 | if (! dev) | |
1270 | continue; | |
1271 | ||
1272 | port = (struct veth_port *)dev->priv; | |
1273 | ||
1274 | if (! (port->lpar_map & (1<<cnx->remote_lp))) | |
1275 | continue; | |
1276 | ||
e0808494 ME |
1277 | spin_lock_irqsave(&port->queue_lock, flags); |
1278 | ||
1279 | port->stopped_map &= ~(1 << cnx->remote_lp); | |
1280 | ||
1281 | if (0 == port->stopped_map && netif_queue_stopped(dev)) { | |
1282 | veth_debug("cnx %d: woke queue for %s.\n", | |
1283 | cnx->remote_lp, dev->name); | |
1284 | netif_wake_queue(dev); | |
1da177e4 | 1285 | } |
e0808494 ME |
1286 | spin_unlock_irqrestore(&port->queue_lock, flags); |
1287 | } | |
1288 | } | |
1289 | ||
1290 | static void veth_stop_queues(struct veth_lpar_connection *cnx) | |
1291 | { | |
1292 | int i; | |
1293 | ||
1294 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) { | |
1295 | struct net_device *dev = veth_dev[i]; | |
1296 | struct veth_port *port; | |
1297 | ||
1298 | if (! dev) | |
1299 | continue; | |
1300 | ||
1301 | port = (struct veth_port *)dev->priv; | |
1302 | ||
1303 | /* If this cnx is not on the vlan for this port, continue */ | |
1304 | if (! (port->lpar_map & (1 << cnx->remote_lp))) | |
1305 | continue; | |
1306 | ||
1307 | spin_lock(&port->queue_lock); | |
1308 | ||
1309 | netif_stop_queue(dev); | |
1310 | port->stopped_map |= (1 << cnx->remote_lp); | |
1311 | ||
1312 | veth_debug("cnx %d: stopped queue for %s, map = 0x%x.\n", | |
1313 | cnx->remote_lp, dev->name, port->stopped_map); | |
1314 | ||
1315 | spin_unlock(&port->queue_lock); | |
1da177e4 LT |
1316 | } |
1317 | } | |
1318 | ||
24562ffa ME |
1319 | static void veth_timed_reset(unsigned long ptr) |
1320 | { | |
1321 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)ptr; | |
1322 | unsigned long trigger_time, flags; | |
1323 | ||
1324 | /* FIXME is it possible this fires after veth_stop_connection()? | |
1325 | * That would reschedule the statemachine for 5 seconds and probably | |
1326 | * execute it after the module's been unloaded. Hmm. */ | |
1327 | ||
1328 | spin_lock_irqsave(&cnx->lock, flags); | |
1329 | ||
1330 | if (cnx->outstanding_tx > 0) { | |
1331 | trigger_time = cnx->last_contact + cnx->reset_timeout; | |
1332 | ||
1333 | if (trigger_time < jiffies) { | |
1334 | cnx->state |= VETH_STATE_RESET; | |
1335 | veth_kick_statemachine(cnx); | |
1336 | veth_error("%d packets not acked by LPAR %d within %d " | |
1337 | "seconds, resetting.\n", | |
1338 | cnx->outstanding_tx, cnx->remote_lp, | |
1339 | cnx->reset_timeout / HZ); | |
1340 | } else { | |
1341 | /* Reschedule the timer */ | |
1342 | trigger_time = jiffies + cnx->reset_timeout; | |
1343 | mod_timer(&cnx->reset_timer, trigger_time); | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | spin_unlock_irqrestore(&cnx->lock, flags); | |
1348 | } | |
1349 | ||
1da177e4 LT |
1350 | /* |
1351 | * Rx path | |
1352 | */ | |
1353 | ||
1354 | static inline int veth_frame_wanted(struct veth_port *port, u64 mac_addr) | |
1355 | { | |
1356 | int wanted = 0; | |
1357 | int i; | |
1358 | unsigned long flags; | |
1359 | ||
1360 | if ( (mac_addr == port->mac_addr) || (mac_addr == 0xffffffffffff0000) ) | |
1361 | return 1; | |
1362 | ||
1da177e4 LT |
1363 | read_lock_irqsave(&port->mcast_gate, flags); |
1364 | ||
2a5391a1 | 1365 | if (port->promiscuous) { |
1da177e4 LT |
1366 | wanted = 1; |
1367 | goto out; | |
1368 | } | |
1369 | ||
1370 | for (i = 0; i < port->num_mcast; ++i) { | |
1371 | if (port->mcast_addr[i] == mac_addr) { | |
1372 | wanted = 1; | |
1373 | break; | |
1374 | } | |
1375 | } | |
1376 | ||
1377 | out: | |
1378 | read_unlock_irqrestore(&port->mcast_gate, flags); | |
1379 | ||
1380 | return wanted; | |
1381 | } | |
1382 | ||
1383 | struct dma_chunk { | |
1384 | u64 addr; | |
1385 | u64 size; | |
1386 | }; | |
1387 | ||
1388 | #define VETH_MAX_PAGES_PER_FRAME ( (VETH_MAX_MTU+PAGE_SIZE-2)/PAGE_SIZE + 1 ) | |
1389 | ||
1390 | static inline void veth_build_dma_list(struct dma_chunk *list, | |
1391 | unsigned char *p, unsigned long length) | |
1392 | { | |
1393 | unsigned long done; | |
1394 | int i = 1; | |
1395 | ||
1396 | /* FIXME: skbs are continguous in real addresses. Do we | |
1397 | * really need to break it into PAGE_SIZE chunks, or can we do | |
1398 | * it just at the granularity of iSeries real->absolute | |
1399 | * mapping? Indeed, given the way the allocator works, can we | |
1400 | * count on them being absolutely contiguous? */ | |
426c1a11 | 1401 | list[0].addr = iseries_hv_addr(p); |
1da177e4 LT |
1402 | list[0].size = min(length, |
1403 | PAGE_SIZE - ((unsigned long)p & ~PAGE_MASK)); | |
1404 | ||
1405 | done = list[0].size; | |
1406 | while (done < length) { | |
426c1a11 | 1407 | list[i].addr = iseries_hv_addr(p + done); |
1da177e4 LT |
1408 | list[i].size = min(length-done, PAGE_SIZE); |
1409 | done += list[i].size; | |
1410 | i++; | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | static void veth_flush_acks(struct veth_lpar_connection *cnx) | |
1415 | { | |
1416 | HvLpEvent_Rc rc; | |
1417 | ||
59f17aeb | 1418 | rc = veth_signaldata(cnx, VETH_EVENT_FRAMES_ACK, |
1da177e4 LT |
1419 | 0, &cnx->pending_acks); |
1420 | ||
1421 | if (rc != HvLpEvent_Rc_Good) | |
61a3c696 ME |
1422 | veth_error("Failed acking frames from LPAR %d, rc = %d\n", |
1423 | cnx->remote_lp, (int)rc); | |
1da177e4 LT |
1424 | |
1425 | cnx->num_pending_acks = 0; | |
1426 | memset(&cnx->pending_acks, 0xff, sizeof(cnx->pending_acks)); | |
1427 | } | |
1428 | ||
1429 | static void veth_receive(struct veth_lpar_connection *cnx, | |
59f17aeb | 1430 | struct veth_lpevent *event) |
1da177e4 | 1431 | { |
59f17aeb | 1432 | struct veth_frames_data *senddata = &event->u.frames_data; |
1da177e4 LT |
1433 | int startchunk = 0; |
1434 | int nchunks; | |
1435 | unsigned long flags; | |
1436 | HvLpDma_Rc rc; | |
1437 | ||
1438 | do { | |
1439 | u16 length = 0; | |
1440 | struct sk_buff *skb; | |
1441 | struct dma_chunk local_list[VETH_MAX_PAGES_PER_FRAME]; | |
1442 | struct dma_chunk remote_list[VETH_MAX_FRAMES_PER_MSG]; | |
1443 | u64 dest; | |
1444 | HvLpVirtualLanIndex vlan; | |
1445 | struct net_device *dev; | |
1446 | struct veth_port *port; | |
1447 | ||
1448 | /* FIXME: do we need this? */ | |
1449 | memset(local_list, 0, sizeof(local_list)); | |
1450 | memset(remote_list, 0, sizeof(VETH_MAX_FRAMES_PER_MSG)); | |
1451 | ||
1452 | /* a 0 address marks the end of the valid entries */ | |
1453 | if (senddata->addr[startchunk] == 0) | |
1454 | break; | |
1455 | ||
1456 | /* make sure that we have at least 1 EOF entry in the | |
1457 | * remaining entries */ | |
1458 | if (! (senddata->eofmask >> (startchunk + VETH_EOF_SHIFT))) { | |
61a3c696 ME |
1459 | veth_error("Missing EOF fragment in event " |
1460 | "eofmask = 0x%x startchunk = %d\n", | |
1461 | (unsigned)senddata->eofmask, | |
1462 | startchunk); | |
1da177e4 LT |
1463 | break; |
1464 | } | |
1465 | ||
1466 | /* build list of chunks in this frame */ | |
1467 | nchunks = 0; | |
1468 | do { | |
1469 | remote_list[nchunks].addr = | |
1470 | (u64) senddata->addr[startchunk+nchunks] << 32; | |
1471 | remote_list[nchunks].size = | |
1472 | senddata->len[startchunk+nchunks]; | |
1473 | length += remote_list[nchunks].size; | |
1474 | } while (! (senddata->eofmask & | |
1475 | (1 << (VETH_EOF_SHIFT + startchunk + nchunks++)))); | |
1476 | ||
1477 | /* length == total length of all chunks */ | |
1478 | /* nchunks == # of chunks in this frame */ | |
1479 | ||
1480 | if ((length - ETH_HLEN) > VETH_MAX_MTU) { | |
61a3c696 ME |
1481 | veth_error("Received oversize frame from LPAR %d " |
1482 | "(length = %d)\n", | |
1483 | cnx->remote_lp, length); | |
1da177e4 LT |
1484 | continue; |
1485 | } | |
1486 | ||
1487 | skb = alloc_skb(length, GFP_ATOMIC); | |
1488 | if (!skb) | |
1489 | continue; | |
1490 | ||
1491 | veth_build_dma_list(local_list, skb->data, length); | |
1492 | ||
1493 | rc = HvCallEvent_dmaBufList(HvLpEvent_Type_VirtualLan, | |
1494 | event->base_event.xSourceLp, | |
1495 | HvLpDma_Direction_RemoteToLocal, | |
1496 | cnx->src_inst, | |
1497 | cnx->dst_inst, | |
1498 | HvLpDma_AddressType_RealAddress, | |
1499 | HvLpDma_AddressType_TceIndex, | |
426c1a11 SR |
1500 | iseries_hv_addr(&local_list), |
1501 | iseries_hv_addr(&remote_list), | |
1da177e4 LT |
1502 | length); |
1503 | if (rc != HvLpDma_Rc_Good) { | |
1504 | dev_kfree_skb_irq(skb); | |
1505 | continue; | |
1506 | } | |
1507 | ||
1508 | vlan = skb->data[9]; | |
1509 | dev = veth_dev[vlan]; | |
41664c03 ME |
1510 | if (! dev) { |
1511 | /* | |
1512 | * Some earlier versions of the driver sent | |
1513 | * broadcasts down all connections, even to lpars | |
1514 | * that weren't on the relevant vlan. So ignore | |
1515 | * packets belonging to a vlan we're not on. | |
1516 | * We can also be here if we receive packets while | |
1517 | * the driver is going down, because then dev is NULL. | |
1518 | */ | |
1519 | dev_kfree_skb_irq(skb); | |
1da177e4 | 1520 | continue; |
41664c03 | 1521 | } |
1da177e4 LT |
1522 | |
1523 | port = (struct veth_port *)dev->priv; | |
1524 | dest = *((u64 *) skb->data) & 0xFFFFFFFFFFFF0000; | |
1525 | ||
1526 | if ((vlan > HVMAXARCHITECTEDVIRTUALLANS) || !port) { | |
1527 | dev_kfree_skb_irq(skb); | |
1528 | continue; | |
1529 | } | |
1530 | if (! veth_frame_wanted(port, dest)) { | |
1531 | dev_kfree_skb_irq(skb); | |
1532 | continue; | |
1533 | } | |
1534 | ||
1535 | skb_put(skb, length); | |
1536 | skb->dev = dev; | |
1537 | skb->protocol = eth_type_trans(skb, dev); | |
1538 | skb->ip_summed = CHECKSUM_NONE; | |
1539 | netif_rx(skb); /* send it up */ | |
1540 | port->stats.rx_packets++; | |
1541 | port->stats.rx_bytes += length; | |
1542 | } while (startchunk += nchunks, startchunk < VETH_MAX_FRAMES_PER_MSG); | |
1543 | ||
1544 | /* Ack it */ | |
1545 | spin_lock_irqsave(&cnx->lock, flags); | |
1546 | BUG_ON(cnx->num_pending_acks > VETH_MAX_ACKS_PER_MSG); | |
1547 | ||
1548 | cnx->pending_acks[cnx->num_pending_acks++] = | |
1549 | event->base_event.xCorrelationToken; | |
1550 | ||
1551 | if ( (cnx->num_pending_acks >= cnx->remote_caps.ack_threshold) | |
1552 | || (cnx->num_pending_acks >= VETH_MAX_ACKS_PER_MSG) ) | |
1553 | veth_flush_acks(cnx); | |
1554 | ||
1555 | spin_unlock_irqrestore(&cnx->lock, flags); | |
1556 | } | |
1557 | ||
1558 | static void veth_timed_ack(unsigned long ptr) | |
1559 | { | |
1560 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *) ptr; | |
1561 | unsigned long flags; | |
1562 | ||
1563 | /* Ack all the events */ | |
1564 | spin_lock_irqsave(&cnx->lock, flags); | |
1565 | if (cnx->num_pending_acks > 0) | |
1566 | veth_flush_acks(cnx); | |
1567 | ||
1568 | /* Reschedule the timer */ | |
1569 | cnx->ack_timer.expires = jiffies + cnx->ack_timeout; | |
1570 | add_timer(&cnx->ack_timer); | |
1571 | spin_unlock_irqrestore(&cnx->lock, flags); | |
1572 | } | |
1573 | ||
1574 | static int veth_remove(struct vio_dev *vdev) | |
1575 | { | |
f0c129ca | 1576 | struct veth_lpar_connection *cnx; |
1da177e4 | 1577 | struct net_device *dev; |
f0c129ca ME |
1578 | struct veth_port *port; |
1579 | int i; | |
1da177e4 | 1580 | |
f0c129ca ME |
1581 | dev = veth_dev[vdev->unit_address]; |
1582 | ||
1583 | if (! dev) | |
1584 | return 0; | |
1585 | ||
1586 | port = netdev_priv(dev); | |
1587 | ||
1588 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1589 | cnx = veth_cnx[i]; | |
1590 | ||
1591 | if (cnx && (port->lpar_map & (1 << i))) { | |
1592 | /* Drop our reference to connections on our VLAN */ | |
1593 | kobject_put(&cnx->kobject); | |
1594 | } | |
1da177e4 | 1595 | } |
f0c129ca ME |
1596 | |
1597 | veth_dev[vdev->unit_address] = NULL; | |
07a5c172 ME |
1598 | kobject_del(&port->kobject); |
1599 | kobject_put(&port->kobject); | |
f0c129ca ME |
1600 | unregister_netdev(dev); |
1601 | free_netdev(dev); | |
1602 | ||
1da177e4 LT |
1603 | return 0; |
1604 | } | |
1605 | ||
1606 | static int veth_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
1607 | { | |
1608 | int i = vdev->unit_address; | |
1609 | struct net_device *dev; | |
f0c129ca | 1610 | struct veth_port *port; |
1da177e4 LT |
1611 | |
1612 | dev = veth_probe_one(i, &vdev->dev); | |
1613 | if (dev == NULL) { | |
1614 | veth_remove(vdev); | |
1615 | return 1; | |
1616 | } | |
1617 | veth_dev[i] = dev; | |
1618 | ||
f0c129ca ME |
1619 | port = (struct veth_port*)netdev_priv(dev); |
1620 | ||
1621 | /* Start the state machine on each connection on this vlan. If we're | |
1622 | * the first dev to do so this will commence link negotiation */ | |
1623 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { | |
1624 | struct veth_lpar_connection *cnx; | |
1625 | ||
1626 | if (! (port->lpar_map & (1 << i))) | |
1627 | continue; | |
1628 | ||
1629 | cnx = veth_cnx[i]; | |
1630 | if (!cnx) | |
1631 | continue; | |
1632 | ||
1633 | kobject_get(&cnx->kobject); | |
1634 | veth_kick_statemachine(cnx); | |
1635 | } | |
1da177e4 LT |
1636 | |
1637 | return 0; | |
1638 | } | |
1639 | ||
1640 | /** | |
1641 | * veth_device_table: Used by vio.c to match devices that we | |
1642 | * support. | |
1643 | */ | |
1644 | static struct vio_device_id veth_device_table[] __devinitdata = { | |
1645 | { "vlan", "" }, | |
fb120da6 | 1646 | { "", "" } |
1da177e4 LT |
1647 | }; |
1648 | MODULE_DEVICE_TABLE(vio, veth_device_table); | |
1649 | ||
1650 | static struct vio_driver veth_driver = { | |
1da177e4 LT |
1651 | .id_table = veth_device_table, |
1652 | .probe = veth_probe, | |
6fdf5392 SR |
1653 | .remove = veth_remove, |
1654 | .driver = { | |
1655 | .name = DRV_NAME, | |
915124d8 | 1656 | .owner = THIS_MODULE, |
6fdf5392 | 1657 | } |
1da177e4 LT |
1658 | }; |
1659 | ||
1660 | /* | |
1661 | * Module initialization/cleanup | |
1662 | */ | |
1663 | ||
1664 | void __exit veth_module_cleanup(void) | |
1665 | { | |
1666 | int i; | |
f0c129ca | 1667 | struct veth_lpar_connection *cnx; |
1da177e4 | 1668 | |
f0c129ca | 1669 | /* Disconnect our "irq" to stop events coming from the Hypervisor. */ |
1da177e4 LT |
1670 | HvLpEvent_unregisterHandler(HvLpEvent_Type_VirtualLan); |
1671 | ||
f0c129ca | 1672 | /* Make sure any work queued from Hypervisor callbacks is finished. */ |
1da177e4 LT |
1673 | flush_scheduled_work(); |
1674 | ||
f0c129ca ME |
1675 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { |
1676 | cnx = veth_cnx[i]; | |
1677 | ||
1678 | if (!cnx) | |
1679 | continue; | |
b2e0852e | 1680 | |
76812d81 ME |
1681 | /* Remove the connection from sysfs */ |
1682 | kobject_del(&cnx->kobject); | |
f0c129ca ME |
1683 | /* Drop the driver's reference to the connection */ |
1684 | kobject_put(&cnx->kobject); | |
1685 | } | |
1da177e4 | 1686 | |
f0c129ca ME |
1687 | /* Unregister the driver, which will close all the netdevs and stop |
1688 | * the connections when they're no longer referenced. */ | |
1689 | vio_unregister_driver(&veth_driver); | |
1da177e4 LT |
1690 | } |
1691 | module_exit(veth_module_cleanup); | |
1692 | ||
1693 | int __init veth_module_init(void) | |
1694 | { | |
1695 | int i; | |
1696 | int rc; | |
1697 | ||
1698 | this_lp = HvLpConfig_getLpIndex_outline(); | |
1699 | ||
1700 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { | |
1701 | rc = veth_init_connection(i); | |
ec60beeb ME |
1702 | if (rc != 0) |
1703 | goto error; | |
1da177e4 LT |
1704 | } |
1705 | ||
1706 | HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan, | |
1707 | &veth_handle_event); | |
1708 | ||
ec60beeb ME |
1709 | rc = vio_register_driver(&veth_driver); |
1710 | if (rc != 0) | |
1711 | goto error; | |
1712 | ||
76812d81 ME |
1713 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { |
1714 | struct kobject *kobj; | |
1715 | ||
1716 | if (!veth_cnx[i]) | |
1717 | continue; | |
1718 | ||
1719 | kobj = &veth_cnx[i]->kobject; | |
1720 | kobj->parent = &veth_driver.driver.kobj; | |
1721 | /* If the add failes, complain but otherwise continue */ | |
1722 | if (0 != kobject_add(kobj)) | |
1723 | veth_error("cnx %d: Failed adding to sysfs.\n", i); | |
1724 | } | |
1725 | ||
ec60beeb ME |
1726 | return 0; |
1727 | ||
1728 | error: | |
1729 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { | |
f0c129ca | 1730 | veth_destroy_connection(veth_cnx[i]); |
ec60beeb ME |
1731 | } |
1732 | ||
1733 | return rc; | |
1da177e4 LT |
1734 | } |
1735 | module_init(veth_module_init); |