Root/
1 | /* sunvnet.c: Sun LDOM Virtual Network Driver. |
2 | * |
3 | * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> |
4 | */ |
5 | |
6 | #include <linux/module.h> |
7 | #include <linux/kernel.h> |
8 | #include <linux/types.h> |
9 | #include <linux/slab.h> |
10 | #include <linux/delay.h> |
11 | #include <linux/init.h> |
12 | #include <linux/netdevice.h> |
13 | #include <linux/ethtool.h> |
14 | #include <linux/etherdevice.h> |
15 | #include <linux/mutex.h> |
16 | |
17 | #include <asm/vio.h> |
18 | #include <asm/ldc.h> |
19 | |
20 | #include "sunvnet.h" |
21 | |
22 | #define DRV_MODULE_NAME "sunvnet" |
23 | #define PFX DRV_MODULE_NAME ": " |
24 | #define DRV_MODULE_VERSION "1.0" |
25 | #define DRV_MODULE_RELDATE "June 25, 2007" |
26 | |
27 | static char version[] __devinitdata = |
28 | DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; |
29 | MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); |
30 | MODULE_DESCRIPTION("Sun LDOM virtual network driver"); |
31 | MODULE_LICENSE("GPL"); |
32 | MODULE_VERSION(DRV_MODULE_VERSION); |
33 | |
34 | /* Ordered from largest major to lowest */ |
35 | static struct vio_version vnet_versions[] = { |
36 | { .major = 1, .minor = 0 }, |
37 | }; |
38 | |
39 | static inline u32 vnet_tx_dring_avail(struct vio_dring_state *dr) |
40 | { |
41 | return vio_dring_avail(dr, VNET_TX_RING_SIZE); |
42 | } |
43 | |
44 | static int vnet_handle_unknown(struct vnet_port *port, void *arg) |
45 | { |
46 | struct vio_msg_tag *pkt = arg; |
47 | |
48 | printk(KERN_ERR PFX "Received unknown msg [%02x:%02x:%04x:%08x]\n", |
49 | pkt->type, pkt->stype, pkt->stype_env, pkt->sid); |
50 | printk(KERN_ERR PFX "Resetting connection.\n"); |
51 | |
52 | ldc_disconnect(port->vio.lp); |
53 | |
54 | return -ECONNRESET; |
55 | } |
56 | |
57 | static int vnet_send_attr(struct vio_driver_state *vio) |
58 | { |
59 | struct vnet_port *port = to_vnet_port(vio); |
60 | struct net_device *dev = port->vp->dev; |
61 | struct vio_net_attr_info pkt; |
62 | int i; |
63 | |
64 | memset(&pkt, 0, sizeof(pkt)); |
65 | pkt.tag.type = VIO_TYPE_CTRL; |
66 | pkt.tag.stype = VIO_SUBTYPE_INFO; |
67 | pkt.tag.stype_env = VIO_ATTR_INFO; |
68 | pkt.tag.sid = vio_send_sid(vio); |
69 | pkt.xfer_mode = VIO_DRING_MODE; |
70 | pkt.addr_type = VNET_ADDR_ETHERMAC; |
71 | pkt.ack_freq = 0; |
72 | for (i = 0; i < 6; i++) |
73 | pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8); |
74 | pkt.mtu = ETH_FRAME_LEN; |
75 | |
76 | viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] " |
77 | "ackfreq[%u] mtu[%llu]\n", |
78 | pkt.xfer_mode, pkt.addr_type, |
79 | (unsigned long long) pkt.addr, |
80 | pkt.ack_freq, |
81 | (unsigned long long) pkt.mtu); |
82 | |
83 | return vio_ldc_send(vio, &pkt, sizeof(pkt)); |
84 | } |
85 | |
86 | static int handle_attr_info(struct vio_driver_state *vio, |
87 | struct vio_net_attr_info *pkt) |
88 | { |
89 | viodbg(HS, "GOT NET ATTR INFO xmode[0x%x] atype[0x%x] addr[%llx] " |
90 | "ackfreq[%u] mtu[%llu]\n", |
91 | pkt->xfer_mode, pkt->addr_type, |
92 | (unsigned long long) pkt->addr, |
93 | pkt->ack_freq, |
94 | (unsigned long long) pkt->mtu); |
95 | |
96 | pkt->tag.sid = vio_send_sid(vio); |
97 | |
98 | if (pkt->xfer_mode != VIO_DRING_MODE || |
99 | pkt->addr_type != VNET_ADDR_ETHERMAC || |
100 | pkt->mtu != ETH_FRAME_LEN) { |
101 | viodbg(HS, "SEND NET ATTR NACK\n"); |
102 | |
103 | pkt->tag.stype = VIO_SUBTYPE_NACK; |
104 | |
105 | (void) vio_ldc_send(vio, pkt, sizeof(*pkt)); |
106 | |
107 | return -ECONNRESET; |
108 | } else { |
109 | viodbg(HS, "SEND NET ATTR ACK\n"); |
110 | |
111 | pkt->tag.stype = VIO_SUBTYPE_ACK; |
112 | |
113 | return vio_ldc_send(vio, pkt, sizeof(*pkt)); |
114 | } |
115 | |
116 | } |
117 | |
118 | static int handle_attr_ack(struct vio_driver_state *vio, |
119 | struct vio_net_attr_info *pkt) |
120 | { |
121 | viodbg(HS, "GOT NET ATTR ACK\n"); |
122 | |
123 | return 0; |
124 | } |
125 | |
126 | static int handle_attr_nack(struct vio_driver_state *vio, |
127 | struct vio_net_attr_info *pkt) |
128 | { |
129 | viodbg(HS, "GOT NET ATTR NACK\n"); |
130 | |
131 | return -ECONNRESET; |
132 | } |
133 | |
134 | static int vnet_handle_attr(struct vio_driver_state *vio, void *arg) |
135 | { |
136 | struct vio_net_attr_info *pkt = arg; |
137 | |
138 | switch (pkt->tag.stype) { |
139 | case VIO_SUBTYPE_INFO: |
140 | return handle_attr_info(vio, pkt); |
141 | |
142 | case VIO_SUBTYPE_ACK: |
143 | return handle_attr_ack(vio, pkt); |
144 | |
145 | case VIO_SUBTYPE_NACK: |
146 | return handle_attr_nack(vio, pkt); |
147 | |
148 | default: |
149 | return -ECONNRESET; |
150 | } |
151 | } |
152 | |
153 | static void vnet_handshake_complete(struct vio_driver_state *vio) |
154 | { |
155 | struct vio_dring_state *dr; |
156 | |
157 | dr = &vio->drings[VIO_DRIVER_RX_RING]; |
158 | dr->snd_nxt = dr->rcv_nxt = 1; |
159 | |
160 | dr = &vio->drings[VIO_DRIVER_TX_RING]; |
161 | dr->snd_nxt = dr->rcv_nxt = 1; |
162 | } |
163 | |
164 | /* The hypervisor interface that implements copying to/from imported |
165 | * memory from another domain requires that copies are done to 8-byte |
166 | * aligned buffers, and that the lengths of such copies are also 8-byte |
167 | * multiples. |
168 | * |
169 | * So we align skb->data to an 8-byte multiple and pad-out the data |
170 | * area so we can round the copy length up to the next multiple of |
171 | * 8 for the copy. |
172 | * |
173 | * The transmitter puts the actual start of the packet 6 bytes into |
174 | * the buffer it sends over, so that the IP headers after the ethernet |
175 | * header are aligned properly. These 6 bytes are not in the descriptor |
176 | * length, they are simply implied. This offset is represented using |
177 | * the VNET_PACKET_SKIP macro. |
178 | */ |
179 | static struct sk_buff *alloc_and_align_skb(struct net_device *dev, |
180 | unsigned int len) |
181 | { |
182 | struct sk_buff *skb = netdev_alloc_skb(dev, len+VNET_PACKET_SKIP+8+8); |
183 | unsigned long addr, off; |
184 | |
185 | if (unlikely(!skb)) |
186 | return NULL; |
187 | |
188 | addr = (unsigned long) skb->data; |
189 | off = ((addr + 7UL) & ~7UL) - addr; |
190 | if (off) |
191 | skb_reserve(skb, off); |
192 | |
193 | return skb; |
194 | } |
195 | |
196 | static int vnet_rx_one(struct vnet_port *port, unsigned int len, |
197 | struct ldc_trans_cookie *cookies, int ncookies) |
198 | { |
199 | struct net_device *dev = port->vp->dev; |
200 | unsigned int copy_len; |
201 | struct sk_buff *skb; |
202 | int err; |
203 | |
204 | err = -EMSGSIZE; |
205 | if (unlikely(len < ETH_ZLEN || len > ETH_FRAME_LEN)) { |
206 | dev->stats.rx_length_errors++; |
207 | goto out_dropped; |
208 | } |
209 | |
210 | skb = alloc_and_align_skb(dev, len); |
211 | err = -ENOMEM; |
212 | if (unlikely(!skb)) { |
213 | dev->stats.rx_missed_errors++; |
214 | goto out_dropped; |
215 | } |
216 | |
217 | copy_len = (len + VNET_PACKET_SKIP + 7U) & ~7U; |
218 | skb_put(skb, copy_len); |
219 | err = ldc_copy(port->vio.lp, LDC_COPY_IN, |
220 | skb->data, copy_len, 0, |
221 | cookies, ncookies); |
222 | if (unlikely(err < 0)) { |
223 | dev->stats.rx_frame_errors++; |
224 | goto out_free_skb; |
225 | } |
226 | |
227 | skb_pull(skb, VNET_PACKET_SKIP); |
228 | skb_trim(skb, len); |
229 | skb->protocol = eth_type_trans(skb, dev); |
230 | |
231 | dev->stats.rx_packets++; |
232 | dev->stats.rx_bytes += len; |
233 | |
234 | netif_rx(skb); |
235 | |
236 | return 0; |
237 | |
238 | out_free_skb: |
239 | kfree_skb(skb); |
240 | |
241 | out_dropped: |
242 | dev->stats.rx_dropped++; |
243 | return err; |
244 | } |
245 | |
246 | static int vnet_send_ack(struct vnet_port *port, struct vio_dring_state *dr, |
247 | u32 start, u32 end, u8 vio_dring_state) |
248 | { |
249 | struct vio_dring_data hdr = { |
250 | .tag = { |
251 | .type = VIO_TYPE_DATA, |
252 | .stype = VIO_SUBTYPE_ACK, |
253 | .stype_env = VIO_DRING_DATA, |
254 | .sid = vio_send_sid(&port->vio), |
255 | }, |
256 | .dring_ident = dr->ident, |
257 | .start_idx = start, |
258 | .end_idx = end, |
259 | .state = vio_dring_state, |
260 | }; |
261 | int err, delay; |
262 | |
263 | hdr.seq = dr->snd_nxt; |
264 | delay = 1; |
265 | do { |
266 | err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr)); |
267 | if (err > 0) { |
268 | dr->snd_nxt++; |
269 | break; |
270 | } |
271 | udelay(delay); |
272 | if ((delay <<= 1) > 128) |
273 | delay = 128; |
274 | } while (err == -EAGAIN); |
275 | |
276 | return err; |
277 | } |
278 | |
279 | static u32 next_idx(u32 idx, struct vio_dring_state *dr) |
280 | { |
281 | if (++idx == dr->num_entries) |
282 | idx = 0; |
283 | return idx; |
284 | } |
285 | |
286 | static u32 prev_idx(u32 idx, struct vio_dring_state *dr) |
287 | { |
288 | if (idx == 0) |
289 | idx = dr->num_entries - 1; |
290 | else |
291 | idx--; |
292 | |
293 | return idx; |
294 | } |
295 | |
296 | static struct vio_net_desc *get_rx_desc(struct vnet_port *port, |
297 | struct vio_dring_state *dr, |
298 | u32 index) |
299 | { |
300 | struct vio_net_desc *desc = port->vio.desc_buf; |
301 | int err; |
302 | |
303 | err = ldc_get_dring_entry(port->vio.lp, desc, dr->entry_size, |
304 | (index * dr->entry_size), |
305 | dr->cookies, dr->ncookies); |
306 | if (err < 0) |
307 | return ERR_PTR(err); |
308 | |
309 | return desc; |
310 | } |
311 | |
312 | static int put_rx_desc(struct vnet_port *port, |
313 | struct vio_dring_state *dr, |
314 | struct vio_net_desc *desc, |
315 | u32 index) |
316 | { |
317 | int err; |
318 | |
319 | err = ldc_put_dring_entry(port->vio.lp, desc, dr->entry_size, |
320 | (index * dr->entry_size), |
321 | dr->cookies, dr->ncookies); |
322 | if (err < 0) |
323 | return err; |
324 | |
325 | return 0; |
326 | } |
327 | |
328 | static int vnet_walk_rx_one(struct vnet_port *port, |
329 | struct vio_dring_state *dr, |
330 | u32 index, int *needs_ack) |
331 | { |
332 | struct vio_net_desc *desc = get_rx_desc(port, dr, index); |
333 | struct vio_driver_state *vio = &port->vio; |
334 | int err; |
335 | |
336 | if (IS_ERR(desc)) |
337 | return PTR_ERR(desc); |
338 | |
339 | viodbg(DATA, "vio_walk_rx_one desc[%02x:%02x:%08x:%08x:%llx:%llx]\n", |
340 | desc->hdr.state, desc->hdr.ack, |
341 | desc->size, desc->ncookies, |
342 | desc->cookies[0].cookie_addr, |
343 | desc->cookies[0].cookie_size); |
344 | |
345 | if (desc->hdr.state != VIO_DESC_READY) |
346 | return 1; |
347 | err = vnet_rx_one(port, desc->size, desc->cookies, desc->ncookies); |
348 | if (err == -ECONNRESET) |
349 | return err; |
350 | desc->hdr.state = VIO_DESC_DONE; |
351 | err = put_rx_desc(port, dr, desc, index); |
352 | if (err < 0) |
353 | return err; |
354 | *needs_ack = desc->hdr.ack; |
355 | return 0; |
356 | } |
357 | |
358 | static int vnet_walk_rx(struct vnet_port *port, struct vio_dring_state *dr, |
359 | u32 start, u32 end) |
360 | { |
361 | struct vio_driver_state *vio = &port->vio; |
362 | int ack_start = -1, ack_end = -1; |
363 | |
364 | end = (end == (u32) -1) ? prev_idx(start, dr) : next_idx(end, dr); |
365 | |
366 | viodbg(DATA, "vnet_walk_rx start[%08x] end[%08x]\n", start, end); |
367 | |
368 | while (start != end) { |
369 | int ack = 0, err = vnet_walk_rx_one(port, dr, start, &ack); |
370 | if (err == -ECONNRESET) |
371 | return err; |
372 | if (err != 0) |
373 | break; |
374 | if (ack_start == -1) |
375 | ack_start = start; |
376 | ack_end = start; |
377 | start = next_idx(start, dr); |
378 | if (ack && start != end) { |
379 | err = vnet_send_ack(port, dr, ack_start, ack_end, |
380 | VIO_DRING_ACTIVE); |
381 | if (err == -ECONNRESET) |
382 | return err; |
383 | ack_start = -1; |
384 | } |
385 | } |
386 | if (unlikely(ack_start == -1)) |
387 | ack_start = ack_end = prev_idx(start, dr); |
388 | return vnet_send_ack(port, dr, ack_start, ack_end, VIO_DRING_STOPPED); |
389 | } |
390 | |
391 | static int vnet_rx(struct vnet_port *port, void *msgbuf) |
392 | { |
393 | struct vio_dring_data *pkt = msgbuf; |
394 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_RX_RING]; |
395 | struct vio_driver_state *vio = &port->vio; |
396 | |
397 | viodbg(DATA, "vnet_rx stype_env[%04x] seq[%016llx] rcv_nxt[%016llx]\n", |
398 | pkt->tag.stype_env, pkt->seq, dr->rcv_nxt); |
399 | |
400 | if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA)) |
401 | return 0; |
402 | if (unlikely(pkt->seq != dr->rcv_nxt)) { |
403 | printk(KERN_ERR PFX "RX out of sequence seq[0x%llx] " |
404 | "rcv_nxt[0x%llx]\n", pkt->seq, dr->rcv_nxt); |
405 | return 0; |
406 | } |
407 | |
408 | dr->rcv_nxt++; |
409 | |
410 | /* XXX Validate pkt->start_idx and pkt->end_idx XXX */ |
411 | |
412 | return vnet_walk_rx(port, dr, pkt->start_idx, pkt->end_idx); |
413 | } |
414 | |
415 | static int idx_is_pending(struct vio_dring_state *dr, u32 end) |
416 | { |
417 | u32 idx = dr->cons; |
418 | int found = 0; |
419 | |
420 | while (idx != dr->prod) { |
421 | if (idx == end) { |
422 | found = 1; |
423 | break; |
424 | } |
425 | idx = next_idx(idx, dr); |
426 | } |
427 | return found; |
428 | } |
429 | |
430 | static int vnet_ack(struct vnet_port *port, void *msgbuf) |
431 | { |
432 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
433 | struct vio_dring_data *pkt = msgbuf; |
434 | struct net_device *dev; |
435 | struct vnet *vp; |
436 | u32 end; |
437 | |
438 | if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA)) |
439 | return 0; |
440 | |
441 | end = pkt->end_idx; |
442 | if (unlikely(!idx_is_pending(dr, end))) |
443 | return 0; |
444 | |
445 | dr->cons = next_idx(end, dr); |
446 | |
447 | vp = port->vp; |
448 | dev = vp->dev; |
449 | if (unlikely(netif_queue_stopped(dev) && |
450 | vnet_tx_dring_avail(dr) >= VNET_TX_WAKEUP_THRESH(dr))) |
451 | return 1; |
452 | |
453 | return 0; |
454 | } |
455 | |
456 | static int vnet_nack(struct vnet_port *port, void *msgbuf) |
457 | { |
458 | /* XXX just reset or similar XXX */ |
459 | return 0; |
460 | } |
461 | |
462 | static int handle_mcast(struct vnet_port *port, void *msgbuf) |
463 | { |
464 | struct vio_net_mcast_info *pkt = msgbuf; |
465 | |
466 | if (pkt->tag.stype != VIO_SUBTYPE_ACK) |
467 | printk(KERN_ERR PFX "%s: Got unexpected MCAST reply " |
468 | "[%02x:%02x:%04x:%08x]\n", |
469 | port->vp->dev->name, |
470 | pkt->tag.type, |
471 | pkt->tag.stype, |
472 | pkt->tag.stype_env, |
473 | pkt->tag.sid); |
474 | |
475 | return 0; |
476 | } |
477 | |
478 | static void maybe_tx_wakeup(struct vnet *vp) |
479 | { |
480 | struct net_device *dev = vp->dev; |
481 | |
482 | netif_tx_lock(dev); |
483 | if (likely(netif_queue_stopped(dev))) { |
484 | struct vnet_port *port; |
485 | int wake = 1; |
486 | |
487 | list_for_each_entry(port, &vp->port_list, list) { |
488 | struct vio_dring_state *dr; |
489 | |
490 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
491 | if (vnet_tx_dring_avail(dr) < |
492 | VNET_TX_WAKEUP_THRESH(dr)) { |
493 | wake = 0; |
494 | break; |
495 | } |
496 | } |
497 | if (wake) |
498 | netif_wake_queue(dev); |
499 | } |
500 | netif_tx_unlock(dev); |
501 | } |
502 | |
503 | static void vnet_event(void *arg, int event) |
504 | { |
505 | struct vnet_port *port = arg; |
506 | struct vio_driver_state *vio = &port->vio; |
507 | unsigned long flags; |
508 | int tx_wakeup, err; |
509 | |
510 | spin_lock_irqsave(&vio->lock, flags); |
511 | |
512 | if (unlikely(event == LDC_EVENT_RESET || |
513 | event == LDC_EVENT_UP)) { |
514 | vio_link_state_change(vio, event); |
515 | spin_unlock_irqrestore(&vio->lock, flags); |
516 | |
517 | if (event == LDC_EVENT_RESET) |
518 | vio_port_up(vio); |
519 | return; |
520 | } |
521 | |
522 | if (unlikely(event != LDC_EVENT_DATA_READY)) { |
523 | printk(KERN_WARNING PFX "Unexpected LDC event %d\n", event); |
524 | spin_unlock_irqrestore(&vio->lock, flags); |
525 | return; |
526 | } |
527 | |
528 | tx_wakeup = err = 0; |
529 | while (1) { |
530 | union { |
531 | struct vio_msg_tag tag; |
532 | u64 raw[8]; |
533 | } msgbuf; |
534 | |
535 | err = ldc_read(vio->lp, &msgbuf, sizeof(msgbuf)); |
536 | if (unlikely(err < 0)) { |
537 | if (err == -ECONNRESET) |
538 | vio_conn_reset(vio); |
539 | break; |
540 | } |
541 | if (err == 0) |
542 | break; |
543 | viodbg(DATA, "TAG [%02x:%02x:%04x:%08x]\n", |
544 | msgbuf.tag.type, |
545 | msgbuf.tag.stype, |
546 | msgbuf.tag.stype_env, |
547 | msgbuf.tag.sid); |
548 | err = vio_validate_sid(vio, &msgbuf.tag); |
549 | if (err < 0) |
550 | break; |
551 | |
552 | if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) { |
553 | if (msgbuf.tag.stype == VIO_SUBTYPE_INFO) { |
554 | err = vnet_rx(port, &msgbuf); |
555 | } else if (msgbuf.tag.stype == VIO_SUBTYPE_ACK) { |
556 | err = vnet_ack(port, &msgbuf); |
557 | if (err > 0) |
558 | tx_wakeup |= err; |
559 | } else if (msgbuf.tag.stype == VIO_SUBTYPE_NACK) { |
560 | err = vnet_nack(port, &msgbuf); |
561 | } |
562 | } else if (msgbuf.tag.type == VIO_TYPE_CTRL) { |
563 | if (msgbuf.tag.stype_env == VNET_MCAST_INFO) |
564 | err = handle_mcast(port, &msgbuf); |
565 | else |
566 | err = vio_control_pkt_engine(vio, &msgbuf); |
567 | if (err) |
568 | break; |
569 | } else { |
570 | err = vnet_handle_unknown(port, &msgbuf); |
571 | } |
572 | if (err == -ECONNRESET) |
573 | break; |
574 | } |
575 | spin_unlock(&vio->lock); |
576 | if (unlikely(tx_wakeup && err != -ECONNRESET)) |
577 | maybe_tx_wakeup(port->vp); |
578 | local_irq_restore(flags); |
579 | } |
580 | |
581 | static int __vnet_tx_trigger(struct vnet_port *port) |
582 | { |
583 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
584 | struct vio_dring_data hdr = { |
585 | .tag = { |
586 | .type = VIO_TYPE_DATA, |
587 | .stype = VIO_SUBTYPE_INFO, |
588 | .stype_env = VIO_DRING_DATA, |
589 | .sid = vio_send_sid(&port->vio), |
590 | }, |
591 | .dring_ident = dr->ident, |
592 | .start_idx = dr->prod, |
593 | .end_idx = (u32) -1, |
594 | }; |
595 | int err, delay; |
596 | |
597 | hdr.seq = dr->snd_nxt; |
598 | delay = 1; |
599 | do { |
600 | err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr)); |
601 | if (err > 0) { |
602 | dr->snd_nxt++; |
603 | break; |
604 | } |
605 | udelay(delay); |
606 | if ((delay <<= 1) > 128) |
607 | delay = 128; |
608 | } while (err == -EAGAIN); |
609 | |
610 | return err; |
611 | } |
612 | |
613 | struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb) |
614 | { |
615 | unsigned int hash = vnet_hashfn(skb->data); |
616 | struct hlist_head *hp = &vp->port_hash[hash]; |
617 | struct hlist_node *n; |
618 | struct vnet_port *port; |
619 | |
620 | hlist_for_each_entry(port, n, hp, hash) { |
621 | if (!compare_ether_addr(port->raddr, skb->data)) |
622 | return port; |
623 | } |
624 | port = NULL; |
625 | if (!list_empty(&vp->port_list)) |
626 | port = list_entry(vp->port_list.next, struct vnet_port, list); |
627 | |
628 | return port; |
629 | } |
630 | |
631 | struct vnet_port *tx_port_find(struct vnet *vp, struct sk_buff *skb) |
632 | { |
633 | struct vnet_port *ret; |
634 | unsigned long flags; |
635 | |
636 | spin_lock_irqsave(&vp->lock, flags); |
637 | ret = __tx_port_find(vp, skb); |
638 | spin_unlock_irqrestore(&vp->lock, flags); |
639 | |
640 | return ret; |
641 | } |
642 | |
643 | static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev) |
644 | { |
645 | struct vnet *vp = netdev_priv(dev); |
646 | struct vnet_port *port = tx_port_find(vp, skb); |
647 | struct vio_dring_state *dr; |
648 | struct vio_net_desc *d; |
649 | unsigned long flags; |
650 | unsigned int len; |
651 | void *tx_buf; |
652 | int i, err; |
653 | |
654 | if (unlikely(!port)) |
655 | goto out_dropped; |
656 | |
657 | spin_lock_irqsave(&port->vio.lock, flags); |
658 | |
659 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
660 | if (unlikely(vnet_tx_dring_avail(dr) < 2)) { |
661 | if (!netif_queue_stopped(dev)) { |
662 | netif_stop_queue(dev); |
663 | |
664 | /* This is a hard error, log it. */ |
665 | printk(KERN_ERR PFX "%s: BUG! Tx Ring full when " |
666 | "queue awake!\n", dev->name); |
667 | dev->stats.tx_errors++; |
668 | } |
669 | spin_unlock_irqrestore(&port->vio.lock, flags); |
670 | return NETDEV_TX_BUSY; |
671 | } |
672 | |
673 | d = vio_dring_cur(dr); |
674 | |
675 | tx_buf = port->tx_bufs[dr->prod].buf; |
676 | skb_copy_from_linear_data(skb, tx_buf + VNET_PACKET_SKIP, skb->len); |
677 | |
678 | len = skb->len; |
679 | if (len < ETH_ZLEN) { |
680 | len = ETH_ZLEN; |
681 | memset(tx_buf+VNET_PACKET_SKIP+skb->len, 0, len - skb->len); |
682 | } |
683 | |
684 | d->hdr.ack = VIO_ACK_ENABLE; |
685 | d->size = len; |
686 | d->ncookies = port->tx_bufs[dr->prod].ncookies; |
687 | for (i = 0; i < d->ncookies; i++) |
688 | d->cookies[i] = port->tx_bufs[dr->prod].cookies[i]; |
689 | |
690 | /* This has to be a non-SMP write barrier because we are writing |
691 | * to memory which is shared with the peer LDOM. |
692 | */ |
693 | wmb(); |
694 | |
695 | d->hdr.state = VIO_DESC_READY; |
696 | |
697 | err = __vnet_tx_trigger(port); |
698 | if (unlikely(err < 0)) { |
699 | printk(KERN_INFO PFX "%s: TX trigger error %d\n", |
700 | dev->name, err); |
701 | d->hdr.state = VIO_DESC_FREE; |
702 | dev->stats.tx_carrier_errors++; |
703 | goto out_dropped_unlock; |
704 | } |
705 | |
706 | dev->stats.tx_packets++; |
707 | dev->stats.tx_bytes += skb->len; |
708 | |
709 | dr->prod = (dr->prod + 1) & (VNET_TX_RING_SIZE - 1); |
710 | if (unlikely(vnet_tx_dring_avail(dr) < 2)) { |
711 | netif_stop_queue(dev); |
712 | if (vnet_tx_dring_avail(dr) > VNET_TX_WAKEUP_THRESH(dr)) |
713 | netif_wake_queue(dev); |
714 | } |
715 | |
716 | spin_unlock_irqrestore(&port->vio.lock, flags); |
717 | |
718 | dev_kfree_skb(skb); |
719 | |
720 | dev->trans_start = jiffies; |
721 | return NETDEV_TX_OK; |
722 | |
723 | out_dropped_unlock: |
724 | spin_unlock_irqrestore(&port->vio.lock, flags); |
725 | |
726 | out_dropped: |
727 | dev_kfree_skb(skb); |
728 | dev->stats.tx_dropped++; |
729 | return NETDEV_TX_OK; |
730 | } |
731 | |
732 | static void vnet_tx_timeout(struct net_device *dev) |
733 | { |
734 | /* XXX Implement me XXX */ |
735 | } |
736 | |
737 | static int vnet_open(struct net_device *dev) |
738 | { |
739 | netif_carrier_on(dev); |
740 | netif_start_queue(dev); |
741 | |
742 | return 0; |
743 | } |
744 | |
745 | static int vnet_close(struct net_device *dev) |
746 | { |
747 | netif_stop_queue(dev); |
748 | netif_carrier_off(dev); |
749 | |
750 | return 0; |
751 | } |
752 | |
753 | static struct vnet_mcast_entry *__vnet_mc_find(struct vnet *vp, u8 *addr) |
754 | { |
755 | struct vnet_mcast_entry *m; |
756 | |
757 | for (m = vp->mcast_list; m; m = m->next) { |
758 | if (!memcmp(m->addr, addr, ETH_ALEN)) |
759 | return m; |
760 | } |
761 | return NULL; |
762 | } |
763 | |
764 | static void __update_mc_list(struct vnet *vp, struct net_device *dev) |
765 | { |
766 | struct dev_addr_list *p; |
767 | |
768 | netdev_for_each_mc_addr(p, dev) { |
769 | struct vnet_mcast_entry *m; |
770 | |
771 | m = __vnet_mc_find(vp, p->dmi_addr); |
772 | if (m) { |
773 | m->hit = 1; |
774 | continue; |
775 | } |
776 | |
777 | if (!m) { |
778 | m = kzalloc(sizeof(*m), GFP_ATOMIC); |
779 | if (!m) |
780 | continue; |
781 | memcpy(m->addr, p->dmi_addr, ETH_ALEN); |
782 | m->hit = 1; |
783 | |
784 | m->next = vp->mcast_list; |
785 | vp->mcast_list = m; |
786 | } |
787 | } |
788 | } |
789 | |
790 | static void __send_mc_list(struct vnet *vp, struct vnet_port *port) |
791 | { |
792 | struct vio_net_mcast_info info; |
793 | struct vnet_mcast_entry *m, **pp; |
794 | int n_addrs; |
795 | |
796 | memset(&info, 0, sizeof(info)); |
797 | |
798 | info.tag.type = VIO_TYPE_CTRL; |
799 | info.tag.stype = VIO_SUBTYPE_INFO; |
800 | info.tag.stype_env = VNET_MCAST_INFO; |
801 | info.tag.sid = vio_send_sid(&port->vio); |
802 | info.set = 1; |
803 | |
804 | n_addrs = 0; |
805 | for (m = vp->mcast_list; m; m = m->next) { |
806 | if (m->sent) |
807 | continue; |
808 | m->sent = 1; |
809 | memcpy(&info.mcast_addr[n_addrs * ETH_ALEN], |
810 | m->addr, ETH_ALEN); |
811 | if (++n_addrs == VNET_NUM_MCAST) { |
812 | info.count = n_addrs; |
813 | |
814 | (void) vio_ldc_send(&port->vio, &info, |
815 | sizeof(info)); |
816 | n_addrs = 0; |
817 | } |
818 | } |
819 | if (n_addrs) { |
820 | info.count = n_addrs; |
821 | (void) vio_ldc_send(&port->vio, &info, sizeof(info)); |
822 | } |
823 | |
824 | info.set = 0; |
825 | |
826 | n_addrs = 0; |
827 | pp = &vp->mcast_list; |
828 | while ((m = *pp) != NULL) { |
829 | if (m->hit) { |
830 | m->hit = 0; |
831 | pp = &m->next; |
832 | continue; |
833 | } |
834 | |
835 | memcpy(&info.mcast_addr[n_addrs * ETH_ALEN], |
836 | m->addr, ETH_ALEN); |
837 | if (++n_addrs == VNET_NUM_MCAST) { |
838 | info.count = n_addrs; |
839 | (void) vio_ldc_send(&port->vio, &info, |
840 | sizeof(info)); |
841 | n_addrs = 0; |
842 | } |
843 | |
844 | *pp = m->next; |
845 | kfree(m); |
846 | } |
847 | if (n_addrs) { |
848 | info.count = n_addrs; |
849 | (void) vio_ldc_send(&port->vio, &info, sizeof(info)); |
850 | } |
851 | } |
852 | |
853 | static void vnet_set_rx_mode(struct net_device *dev) |
854 | { |
855 | struct vnet *vp = netdev_priv(dev); |
856 | struct vnet_port *port; |
857 | unsigned long flags; |
858 | |
859 | spin_lock_irqsave(&vp->lock, flags); |
860 | if (!list_empty(&vp->port_list)) { |
861 | port = list_entry(vp->port_list.next, struct vnet_port, list); |
862 | |
863 | if (port->switch_port) { |
864 | __update_mc_list(vp, dev); |
865 | __send_mc_list(vp, port); |
866 | } |
867 | } |
868 | spin_unlock_irqrestore(&vp->lock, flags); |
869 | } |
870 | |
871 | static int vnet_change_mtu(struct net_device *dev, int new_mtu) |
872 | { |
873 | if (new_mtu != ETH_DATA_LEN) |
874 | return -EINVAL; |
875 | |
876 | dev->mtu = new_mtu; |
877 | return 0; |
878 | } |
879 | |
880 | static int vnet_set_mac_addr(struct net_device *dev, void *p) |
881 | { |
882 | return -EINVAL; |
883 | } |
884 | |
885 | static void vnet_get_drvinfo(struct net_device *dev, |
886 | struct ethtool_drvinfo *info) |
887 | { |
888 | strcpy(info->driver, DRV_MODULE_NAME); |
889 | strcpy(info->version, DRV_MODULE_VERSION); |
890 | } |
891 | |
892 | static u32 vnet_get_msglevel(struct net_device *dev) |
893 | { |
894 | struct vnet *vp = netdev_priv(dev); |
895 | return vp->msg_enable; |
896 | } |
897 | |
898 | static void vnet_set_msglevel(struct net_device *dev, u32 value) |
899 | { |
900 | struct vnet *vp = netdev_priv(dev); |
901 | vp->msg_enable = value; |
902 | } |
903 | |
904 | static const struct ethtool_ops vnet_ethtool_ops = { |
905 | .get_drvinfo = vnet_get_drvinfo, |
906 | .get_msglevel = vnet_get_msglevel, |
907 | .set_msglevel = vnet_set_msglevel, |
908 | .get_link = ethtool_op_get_link, |
909 | }; |
910 | |
911 | static void vnet_port_free_tx_bufs(struct vnet_port *port) |
912 | { |
913 | struct vio_dring_state *dr; |
914 | int i; |
915 | |
916 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
917 | if (dr->base) { |
918 | ldc_free_exp_dring(port->vio.lp, dr->base, |
919 | (dr->entry_size * dr->num_entries), |
920 | dr->cookies, dr->ncookies); |
921 | dr->base = NULL; |
922 | dr->entry_size = 0; |
923 | dr->num_entries = 0; |
924 | dr->pending = 0; |
925 | dr->ncookies = 0; |
926 | } |
927 | |
928 | for (i = 0; i < VNET_TX_RING_SIZE; i++) { |
929 | void *buf = port->tx_bufs[i].buf; |
930 | |
931 | if (!buf) |
932 | continue; |
933 | |
934 | ldc_unmap(port->vio.lp, |
935 | port->tx_bufs[i].cookies, |
936 | port->tx_bufs[i].ncookies); |
937 | |
938 | kfree(buf); |
939 | port->tx_bufs[i].buf = NULL; |
940 | } |
941 | } |
942 | |
943 | static int __devinit vnet_port_alloc_tx_bufs(struct vnet_port *port) |
944 | { |
945 | struct vio_dring_state *dr; |
946 | unsigned long len; |
947 | int i, err, ncookies; |
948 | void *dring; |
949 | |
950 | for (i = 0; i < VNET_TX_RING_SIZE; i++) { |
951 | void *buf = kzalloc(ETH_FRAME_LEN + 8, GFP_KERNEL); |
952 | int map_len = (ETH_FRAME_LEN + 7) & ~7; |
953 | |
954 | err = -ENOMEM; |
955 | if (!buf) { |
956 | printk(KERN_ERR "TX buffer allocation failure\n"); |
957 | goto err_out; |
958 | } |
959 | err = -EFAULT; |
960 | if ((unsigned long)buf & (8UL - 1)) { |
961 | printk(KERN_ERR "TX buffer misaligned\n"); |
962 | kfree(buf); |
963 | goto err_out; |
964 | } |
965 | |
966 | err = ldc_map_single(port->vio.lp, buf, map_len, |
967 | port->tx_bufs[i].cookies, 2, |
968 | (LDC_MAP_SHADOW | |
969 | LDC_MAP_DIRECT | |
970 | LDC_MAP_RW)); |
971 | if (err < 0) { |
972 | kfree(buf); |
973 | goto err_out; |
974 | } |
975 | port->tx_bufs[i].buf = buf; |
976 | port->tx_bufs[i].ncookies = err; |
977 | } |
978 | |
979 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
980 | |
981 | len = (VNET_TX_RING_SIZE * |
982 | (sizeof(struct vio_net_desc) + |
983 | (sizeof(struct ldc_trans_cookie) * 2))); |
984 | |
985 | ncookies = VIO_MAX_RING_COOKIES; |
986 | dring = ldc_alloc_exp_dring(port->vio.lp, len, |
987 | dr->cookies, &ncookies, |
988 | (LDC_MAP_SHADOW | |
989 | LDC_MAP_DIRECT | |
990 | LDC_MAP_RW)); |
991 | if (IS_ERR(dring)) { |
992 | err = PTR_ERR(dring); |
993 | goto err_out; |
994 | } |
995 | |
996 | dr->base = dring; |
997 | dr->entry_size = (sizeof(struct vio_net_desc) + |
998 | (sizeof(struct ldc_trans_cookie) * 2)); |
999 | dr->num_entries = VNET_TX_RING_SIZE; |
1000 | dr->prod = dr->cons = 0; |
1001 | dr->pending = VNET_TX_RING_SIZE; |
1002 | dr->ncookies = ncookies; |
1003 | |
1004 | return 0; |
1005 | |
1006 | err_out: |
1007 | vnet_port_free_tx_bufs(port); |
1008 | |
1009 | return err; |
1010 | } |
1011 | |
1012 | static LIST_HEAD(vnet_list); |
1013 | static DEFINE_MUTEX(vnet_list_mutex); |
1014 | |
1015 | static const struct net_device_ops vnet_ops = { |
1016 | .ndo_open = vnet_open, |
1017 | .ndo_stop = vnet_close, |
1018 | .ndo_set_multicast_list = vnet_set_rx_mode, |
1019 | .ndo_set_mac_address = vnet_set_mac_addr, |
1020 | .ndo_validate_addr = eth_validate_addr, |
1021 | .ndo_tx_timeout = vnet_tx_timeout, |
1022 | .ndo_change_mtu = vnet_change_mtu, |
1023 | .ndo_start_xmit = vnet_start_xmit, |
1024 | }; |
1025 | |
1026 | static struct vnet * __devinit vnet_new(const u64 *local_mac) |
1027 | { |
1028 | struct net_device *dev; |
1029 | struct vnet *vp; |
1030 | int err, i; |
1031 | |
1032 | dev = alloc_etherdev(sizeof(*vp)); |
1033 | if (!dev) { |
1034 | printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n"); |
1035 | return ERR_PTR(-ENOMEM); |
1036 | } |
1037 | |
1038 | for (i = 0; i < ETH_ALEN; i++) |
1039 | dev->dev_addr[i] = (*local_mac >> (5 - i) * 8) & 0xff; |
1040 | |
1041 | memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len); |
1042 | |
1043 | vp = netdev_priv(dev); |
1044 | |
1045 | spin_lock_init(&vp->lock); |
1046 | vp->dev = dev; |
1047 | |
1048 | INIT_LIST_HEAD(&vp->port_list); |
1049 | for (i = 0; i < VNET_PORT_HASH_SIZE; i++) |
1050 | INIT_HLIST_HEAD(&vp->port_hash[i]); |
1051 | INIT_LIST_HEAD(&vp->list); |
1052 | vp->local_mac = *local_mac; |
1053 | |
1054 | dev->netdev_ops = &vnet_ops; |
1055 | dev->ethtool_ops = &vnet_ethtool_ops; |
1056 | dev->watchdog_timeo = VNET_TX_TIMEOUT; |
1057 | |
1058 | err = register_netdev(dev); |
1059 | if (err) { |
1060 | printk(KERN_ERR PFX "Cannot register net device, " |
1061 | "aborting.\n"); |
1062 | goto err_out_free_dev; |
1063 | } |
1064 | |
1065 | printk(KERN_INFO "%s: Sun LDOM vnet %pM\n", dev->name, dev->dev_addr); |
1066 | |
1067 | list_add(&vp->list, &vnet_list); |
1068 | |
1069 | return vp; |
1070 | |
1071 | err_out_free_dev: |
1072 | free_netdev(dev); |
1073 | |
1074 | return ERR_PTR(err); |
1075 | } |
1076 | |
1077 | static struct vnet * __devinit vnet_find_or_create(const u64 *local_mac) |
1078 | { |
1079 | struct vnet *iter, *vp; |
1080 | |
1081 | mutex_lock(&vnet_list_mutex); |
1082 | vp = NULL; |
1083 | list_for_each_entry(iter, &vnet_list, list) { |
1084 | if (iter->local_mac == *local_mac) { |
1085 | vp = iter; |
1086 | break; |
1087 | } |
1088 | } |
1089 | if (!vp) |
1090 | vp = vnet_new(local_mac); |
1091 | mutex_unlock(&vnet_list_mutex); |
1092 | |
1093 | return vp; |
1094 | } |
1095 | |
1096 | static const char *local_mac_prop = "local-mac-address"; |
1097 | |
1098 | static struct vnet * __devinit vnet_find_parent(struct mdesc_handle *hp, |
1099 | u64 port_node) |
1100 | { |
1101 | const u64 *local_mac = NULL; |
1102 | u64 a; |
1103 | |
1104 | mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) { |
1105 | u64 target = mdesc_arc_target(hp, a); |
1106 | const char *name; |
1107 | |
1108 | name = mdesc_get_property(hp, target, "name", NULL); |
1109 | if (!name || strcmp(name, "network")) |
1110 | continue; |
1111 | |
1112 | local_mac = mdesc_get_property(hp, target, |
1113 | local_mac_prop, NULL); |
1114 | if (local_mac) |
1115 | break; |
1116 | } |
1117 | if (!local_mac) |
1118 | return ERR_PTR(-ENODEV); |
1119 | |
1120 | return vnet_find_or_create(local_mac); |
1121 | } |
1122 | |
1123 | static struct ldc_channel_config vnet_ldc_cfg = { |
1124 | .event = vnet_event, |
1125 | .mtu = 64, |
1126 | .mode = LDC_MODE_UNRELIABLE, |
1127 | }; |
1128 | |
1129 | static struct vio_driver_ops vnet_vio_ops = { |
1130 | .send_attr = vnet_send_attr, |
1131 | .handle_attr = vnet_handle_attr, |
1132 | .handshake_complete = vnet_handshake_complete, |
1133 | }; |
1134 | |
1135 | static void __devinit print_version(void) |
1136 | { |
1137 | static int version_printed; |
1138 | |
1139 | if (version_printed++ == 0) |
1140 | printk(KERN_INFO "%s", version); |
1141 | } |
1142 | |
1143 | const char *remote_macaddr_prop = "remote-mac-address"; |
1144 | |
1145 | static int __devinit vnet_port_probe(struct vio_dev *vdev, |
1146 | const struct vio_device_id *id) |
1147 | { |
1148 | struct mdesc_handle *hp; |
1149 | struct vnet_port *port; |
1150 | unsigned long flags; |
1151 | struct vnet *vp; |
1152 | const u64 *rmac; |
1153 | int len, i, err, switch_port; |
1154 | |
1155 | print_version(); |
1156 | |
1157 | hp = mdesc_grab(); |
1158 | |
1159 | vp = vnet_find_parent(hp, vdev->mp); |
1160 | if (IS_ERR(vp)) { |
1161 | printk(KERN_ERR PFX "Cannot find port parent vnet.\n"); |
1162 | err = PTR_ERR(vp); |
1163 | goto err_out_put_mdesc; |
1164 | } |
1165 | |
1166 | rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len); |
1167 | err = -ENODEV; |
1168 | if (!rmac) { |
1169 | printk(KERN_ERR PFX "Port lacks %s property.\n", |
1170 | remote_macaddr_prop); |
1171 | goto err_out_put_mdesc; |
1172 | } |
1173 | |
1174 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
1175 | err = -ENOMEM; |
1176 | if (!port) { |
1177 | printk(KERN_ERR PFX "Cannot allocate vnet_port.\n"); |
1178 | goto err_out_put_mdesc; |
1179 | } |
1180 | |
1181 | for (i = 0; i < ETH_ALEN; i++) |
1182 | port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff; |
1183 | |
1184 | port->vp = vp; |
1185 | |
1186 | err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK, |
1187 | vnet_versions, ARRAY_SIZE(vnet_versions), |
1188 | &vnet_vio_ops, vp->dev->name); |
1189 | if (err) |
1190 | goto err_out_free_port; |
1191 | |
1192 | err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port); |
1193 | if (err) |
1194 | goto err_out_free_port; |
1195 | |
1196 | err = vnet_port_alloc_tx_bufs(port); |
1197 | if (err) |
1198 | goto err_out_free_ldc; |
1199 | |
1200 | INIT_HLIST_NODE(&port->hash); |
1201 | INIT_LIST_HEAD(&port->list); |
1202 | |
1203 | switch_port = 0; |
1204 | if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL) != NULL) |
1205 | switch_port = 1; |
1206 | port->switch_port = switch_port; |
1207 | |
1208 | spin_lock_irqsave(&vp->lock, flags); |
1209 | if (switch_port) |
1210 | list_add(&port->list, &vp->port_list); |
1211 | else |
1212 | list_add_tail(&port->list, &vp->port_list); |
1213 | hlist_add_head(&port->hash, &vp->port_hash[vnet_hashfn(port->raddr)]); |
1214 | spin_unlock_irqrestore(&vp->lock, flags); |
1215 | |
1216 | dev_set_drvdata(&vdev->dev, port); |
1217 | |
1218 | printk(KERN_INFO "%s: PORT ( remote-mac %pM%s )\n", |
1219 | vp->dev->name, port->raddr, |
1220 | switch_port ? " switch-port" : ""); |
1221 | |
1222 | vio_port_up(&port->vio); |
1223 | |
1224 | mdesc_release(hp); |
1225 | |
1226 | return 0; |
1227 | |
1228 | err_out_free_ldc: |
1229 | vio_ldc_free(&port->vio); |
1230 | |
1231 | err_out_free_port: |
1232 | kfree(port); |
1233 | |
1234 | err_out_put_mdesc: |
1235 | mdesc_release(hp); |
1236 | return err; |
1237 | } |
1238 | |
1239 | static int vnet_port_remove(struct vio_dev *vdev) |
1240 | { |
1241 | struct vnet_port *port = dev_get_drvdata(&vdev->dev); |
1242 | |
1243 | if (port) { |
1244 | struct vnet *vp = port->vp; |
1245 | unsigned long flags; |
1246 | |
1247 | del_timer_sync(&port->vio.timer); |
1248 | |
1249 | spin_lock_irqsave(&vp->lock, flags); |
1250 | list_del(&port->list); |
1251 | hlist_del(&port->hash); |
1252 | spin_unlock_irqrestore(&vp->lock, flags); |
1253 | |
1254 | vnet_port_free_tx_bufs(port); |
1255 | vio_ldc_free(&port->vio); |
1256 | |
1257 | dev_set_drvdata(&vdev->dev, NULL); |
1258 | |
1259 | kfree(port); |
1260 | } |
1261 | return 0; |
1262 | } |
1263 | |
1264 | static const struct vio_device_id vnet_port_match[] = { |
1265 | { |
1266 | .type = "vnet-port", |
1267 | }, |
1268 | {}, |
1269 | }; |
1270 | MODULE_DEVICE_TABLE(vio, vnet_port_match); |
1271 | |
1272 | static struct vio_driver vnet_port_driver = { |
1273 | .id_table = vnet_port_match, |
1274 | .probe = vnet_port_probe, |
1275 | .remove = vnet_port_remove, |
1276 | .driver = { |
1277 | .name = "vnet_port", |
1278 | .owner = THIS_MODULE, |
1279 | } |
1280 | }; |
1281 | |
1282 | static int __init vnet_init(void) |
1283 | { |
1284 | return vio_register_driver(&vnet_port_driver); |
1285 | } |
1286 | |
1287 | static void __exit vnet_exit(void) |
1288 | { |
1289 | vio_unregister_driver(&vnet_port_driver); |
1290 | } |
1291 | |
1292 | module_init(vnet_init); |
1293 | module_exit(vnet_exit); |
1294 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9