Commit | Line | Data |
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4c521e42 DM |
1 | /* sunvnet.c: Sun LDOM Virtual Network Driver. |
2 | * | |
3d452e55 | 3 | * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> |
4c521e42 DM |
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> | |
9184a046 | 15 | #include <linux/mutex.h> |
4c521e42 DM |
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:%lx:%lx]\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[%016lx] rcv_nxt[%016lx]\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%lx] " | |
404 | "rcv_nxt[0x%lx]\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 | ||
028ebff2 DM |
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 | ||
4c521e42 DM |
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 | ||
d762acdb DM |
517 | if (event == LDC_EVENT_RESET) |
518 | vio_port_up(vio); | |
4c521e42 DM |
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) { | |
028ebff2 DM |
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); | |
4c521e42 DM |
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 | ||
028ebff2 DM |
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 | for (p = dev->mc_list; p; p = p->next) { | |
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 | ||
4c521e42 DM |
853 | static void vnet_set_rx_mode(struct net_device *dev) |
854 | { | |
028ebff2 DM |
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); | |
4c521e42 DM |
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, | |
4c521e42 DM |
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 | ||
9184a046 DM |
1012 | static LIST_HEAD(vnet_list); |
1013 | static DEFINE_MUTEX(vnet_list_mutex); | |
1014 | ||
1015 | static struct vnet * __devinit vnet_new(const u64 *local_mac) | |
1016 | { | |
1017 | struct net_device *dev; | |
1018 | struct vnet *vp; | |
1019 | int err, i; | |
1020 | ||
1021 | dev = alloc_etherdev(sizeof(*vp)); | |
1022 | if (!dev) { | |
1023 | printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n"); | |
1024 | return ERR_PTR(-ENOMEM); | |
1025 | } | |
1026 | ||
1027 | for (i = 0; i < ETH_ALEN; i++) | |
1028 | dev->dev_addr[i] = (*local_mac >> (5 - i) * 8) & 0xff; | |
1029 | ||
1030 | memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len); | |
1031 | ||
1032 | vp = netdev_priv(dev); | |
1033 | ||
1034 | spin_lock_init(&vp->lock); | |
1035 | vp->dev = dev; | |
1036 | ||
1037 | INIT_LIST_HEAD(&vp->port_list); | |
1038 | for (i = 0; i < VNET_PORT_HASH_SIZE; i++) | |
1039 | INIT_HLIST_HEAD(&vp->port_hash[i]); | |
1040 | INIT_LIST_HEAD(&vp->list); | |
1041 | vp->local_mac = *local_mac; | |
1042 | ||
1043 | dev->open = vnet_open; | |
1044 | dev->stop = vnet_close; | |
1045 | dev->set_multicast_list = vnet_set_rx_mode; | |
1046 | dev->set_mac_address = vnet_set_mac_addr; | |
1047 | dev->tx_timeout = vnet_tx_timeout; | |
1048 | dev->ethtool_ops = &vnet_ethtool_ops; | |
1049 | dev->watchdog_timeo = VNET_TX_TIMEOUT; | |
1050 | dev->change_mtu = vnet_change_mtu; | |
1051 | dev->hard_start_xmit = vnet_start_xmit; | |
1052 | ||
1053 | err = register_netdev(dev); | |
1054 | if (err) { | |
1055 | printk(KERN_ERR PFX "Cannot register net device, " | |
1056 | "aborting.\n"); | |
1057 | goto err_out_free_dev; | |
1058 | } | |
1059 | ||
1060 | printk(KERN_INFO "%s: Sun LDOM vnet ", dev->name); | |
1061 | ||
1062 | for (i = 0; i < 6; i++) | |
1063 | printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':'); | |
1064 | ||
1065 | list_add(&vp->list, &vnet_list); | |
1066 | ||
1067 | return vp; | |
1068 | ||
1069 | err_out_free_dev: | |
1070 | free_netdev(dev); | |
1071 | ||
1072 | return ERR_PTR(err); | |
1073 | } | |
1074 | ||
1075 | static struct vnet * __devinit vnet_find_or_create(const u64 *local_mac) | |
1076 | { | |
1077 | struct vnet *iter, *vp; | |
1078 | ||
1079 | mutex_lock(&vnet_list_mutex); | |
1080 | vp = NULL; | |
1081 | list_for_each_entry(iter, &vnet_list, list) { | |
1082 | if (iter->local_mac == *local_mac) { | |
1083 | vp = iter; | |
1084 | break; | |
1085 | } | |
1086 | } | |
1087 | if (!vp) | |
1088 | vp = vnet_new(local_mac); | |
1089 | mutex_unlock(&vnet_list_mutex); | |
1090 | ||
1091 | return vp; | |
1092 | } | |
1093 | ||
1094 | static const char *local_mac_prop = "local-mac-address"; | |
1095 | ||
1096 | static struct vnet * __devinit vnet_find_parent(struct mdesc_handle *hp, | |
1097 | u64 port_node) | |
1098 | { | |
1099 | const u64 *local_mac = NULL; | |
1100 | u64 a; | |
1101 | ||
1102 | mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) { | |
1103 | u64 target = mdesc_arc_target(hp, a); | |
1104 | const char *name; | |
1105 | ||
1106 | name = mdesc_get_property(hp, target, "name", NULL); | |
1107 | if (!name || strcmp(name, "network")) | |
1108 | continue; | |
1109 | ||
1110 | local_mac = mdesc_get_property(hp, target, | |
1111 | local_mac_prop, NULL); | |
1112 | if (local_mac) | |
1113 | break; | |
1114 | } | |
1115 | if (!local_mac) | |
1116 | return ERR_PTR(-ENODEV); | |
1117 | ||
1118 | return vnet_find_or_create(local_mac); | |
1119 | } | |
1120 | ||
4c521e42 DM |
1121 | static struct ldc_channel_config vnet_ldc_cfg = { |
1122 | .event = vnet_event, | |
1123 | .mtu = 64, | |
1124 | .mode = LDC_MODE_UNRELIABLE, | |
1125 | }; | |
1126 | ||
1127 | static struct vio_driver_ops vnet_vio_ops = { | |
1128 | .send_attr = vnet_send_attr, | |
1129 | .handle_attr = vnet_handle_attr, | |
1130 | .handshake_complete = vnet_handshake_complete, | |
1131 | }; | |
1132 | ||
aa782d31 | 1133 | static void __devinit print_version(void) |
9184a046 DM |
1134 | { |
1135 | static int version_printed; | |
1136 | ||
1137 | if (version_printed++ == 0) | |
1138 | printk(KERN_INFO "%s", version); | |
1139 | } | |
1140 | ||
4c521e42 DM |
1141 | const char *remote_macaddr_prop = "remote-mac-address"; |
1142 | ||
1143 | static int __devinit vnet_port_probe(struct vio_dev *vdev, | |
1144 | const struct vio_device_id *id) | |
1145 | { | |
43fdf274 | 1146 | struct mdesc_handle *hp; |
4c521e42 DM |
1147 | struct vnet_port *port; |
1148 | unsigned long flags; | |
1149 | struct vnet *vp; | |
1150 | const u64 *rmac; | |
1151 | int len, i, err, switch_port; | |
137919a9 | 1152 | DECLARE_MAC_BUF(mac); |
4c521e42 | 1153 | |
9184a046 | 1154 | print_version(); |
4c521e42 | 1155 | |
43fdf274 DM |
1156 | hp = mdesc_grab(); |
1157 | ||
9184a046 DM |
1158 | vp = vnet_find_parent(hp, vdev->mp); |
1159 | if (IS_ERR(vp)) { | |
1160 | printk(KERN_ERR PFX "Cannot find port parent vnet.\n"); | |
1161 | err = PTR_ERR(vp); | |
1162 | goto err_out_put_mdesc; | |
1163 | } | |
1164 | ||
43fdf274 DM |
1165 | rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len); |
1166 | err = -ENODEV; | |
4c521e42 DM |
1167 | if (!rmac) { |
1168 | printk(KERN_ERR PFX "Port lacks %s property.\n", | |
1169 | remote_macaddr_prop); | |
43fdf274 | 1170 | goto err_out_put_mdesc; |
4c521e42 DM |
1171 | } |
1172 | ||
1173 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
43fdf274 | 1174 | err = -ENOMEM; |
4c521e42 DM |
1175 | if (!port) { |
1176 | printk(KERN_ERR PFX "Cannot allocate vnet_port.\n"); | |
43fdf274 | 1177 | goto err_out_put_mdesc; |
4c521e42 DM |
1178 | } |
1179 | ||
1180 | for (i = 0; i < ETH_ALEN; i++) | |
1181 | port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff; | |
1182 | ||
1183 | port->vp = vp; | |
1184 | ||
43fdf274 | 1185 | err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK, |
4c521e42 DM |
1186 | vnet_versions, ARRAY_SIZE(vnet_versions), |
1187 | &vnet_vio_ops, vp->dev->name); | |
1188 | if (err) | |
1189 | goto err_out_free_port; | |
1190 | ||
1191 | err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port); | |
1192 | if (err) | |
1193 | goto err_out_free_port; | |
1194 | ||
1195 | err = vnet_port_alloc_tx_bufs(port); | |
1196 | if (err) | |
1197 | goto err_out_free_ldc; | |
1198 | ||
1199 | INIT_HLIST_NODE(&port->hash); | |
1200 | INIT_LIST_HEAD(&port->list); | |
1201 | ||
1202 | switch_port = 0; | |
43fdf274 | 1203 | if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL) != NULL) |
4c521e42 | 1204 | switch_port = 1; |
028ebff2 | 1205 | port->switch_port = switch_port; |
4c521e42 DM |
1206 | |
1207 | spin_lock_irqsave(&vp->lock, flags); | |
1208 | if (switch_port) | |
1209 | list_add(&port->list, &vp->port_list); | |
1210 | else | |
1211 | list_add_tail(&port->list, &vp->port_list); | |
1212 | hlist_add_head(&port->hash, &vp->port_hash[vnet_hashfn(port->raddr)]); | |
1213 | spin_unlock_irqrestore(&vp->lock, flags); | |
1214 | ||
1215 | dev_set_drvdata(&vdev->dev, port); | |
1216 | ||
137919a9 JP |
1217 | printk(KERN_INFO "%s: PORT ( remote-mac %s%s )\n", |
1218 | vp->dev->name, print_mac(mac, port->raddr), | |
1219 | switch_port ? " switch-port" : ""); | |
4c521e42 DM |
1220 | |
1221 | vio_port_up(&port->vio); | |
1222 | ||
43fdf274 DM |
1223 | mdesc_release(hp); |
1224 | ||
4c521e42 DM |
1225 | return 0; |
1226 | ||
1227 | err_out_free_ldc: | |
1228 | vio_ldc_free(&port->vio); | |
1229 | ||
1230 | err_out_free_port: | |
1231 | kfree(port); | |
1232 | ||
43fdf274 DM |
1233 | err_out_put_mdesc: |
1234 | mdesc_release(hp); | |
4c521e42 DM |
1235 | return err; |
1236 | } | |
1237 | ||
1238 | static int vnet_port_remove(struct vio_dev *vdev) | |
1239 | { | |
1240 | struct vnet_port *port = dev_get_drvdata(&vdev->dev); | |
1241 | ||
1242 | if (port) { | |
1243 | struct vnet *vp = port->vp; | |
1244 | unsigned long flags; | |
1245 | ||
1246 | del_timer_sync(&port->vio.timer); | |
1247 | ||
1248 | spin_lock_irqsave(&vp->lock, flags); | |
1249 | list_del(&port->list); | |
1250 | hlist_del(&port->hash); | |
1251 | spin_unlock_irqrestore(&vp->lock, flags); | |
1252 | ||
1253 | vnet_port_free_tx_bufs(port); | |
1254 | vio_ldc_free(&port->vio); | |
1255 | ||
1256 | dev_set_drvdata(&vdev->dev, NULL); | |
1257 | ||
1258 | kfree(port); | |
1259 | } | |
1260 | return 0; | |
1261 | } | |
1262 | ||
3d452e55 | 1263 | static const struct vio_device_id vnet_port_match[] = { |
4c521e42 DM |
1264 | { |
1265 | .type = "vnet-port", | |
1266 | }, | |
1267 | {}, | |
1268 | }; | |
da68e081 | 1269 | MODULE_DEVICE_TABLE(vio, vnet_port_match); |
4c521e42 DM |
1270 | |
1271 | static struct vio_driver vnet_port_driver = { | |
1272 | .id_table = vnet_port_match, | |
1273 | .probe = vnet_port_probe, | |
1274 | .remove = vnet_port_remove, | |
1275 | .driver = { | |
1276 | .name = "vnet_port", | |
1277 | .owner = THIS_MODULE, | |
1278 | } | |
1279 | }; | |
1280 | ||
4c521e42 DM |
1281 | static int __init vnet_init(void) |
1282 | { | |
9184a046 | 1283 | return vio_register_driver(&vnet_port_driver); |
4c521e42 DM |
1284 | } |
1285 | ||
1286 | static void __exit vnet_exit(void) | |
1287 | { | |
1288 | vio_unregister_driver(&vnet_port_driver); | |
4c521e42 DM |
1289 | } |
1290 | ||
1291 | module_init(vnet_init); | |
1292 | module_exit(vnet_exit); |