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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 | ||
4d5870ec JP |
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
7 | ||
4c521e42 DM |
8 | #include <linux/module.h> |
9 | #include <linux/kernel.h> | |
10 | #include <linux/types.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/ethtool.h> | |
16 | #include <linux/etherdevice.h> | |
9184a046 | 17 | #include <linux/mutex.h> |
e4defc77 | 18 | #include <linux/if_vlan.h> |
4c521e42 DM |
19 | |
20 | #include <asm/vio.h> | |
21 | #include <asm/ldc.h> | |
22 | ||
23 | #include "sunvnet.h" | |
24 | ||
25 | #define DRV_MODULE_NAME "sunvnet" | |
4c521e42 DM |
26 | #define DRV_MODULE_VERSION "1.0" |
27 | #define DRV_MODULE_RELDATE "June 25, 2007" | |
28 | ||
f73d12bd | 29 | static char version[] = |
4c521e42 DM |
30 | DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; |
31 | MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); | |
32 | MODULE_DESCRIPTION("Sun LDOM virtual network driver"); | |
33 | MODULE_LICENSE("GPL"); | |
34 | MODULE_VERSION(DRV_MODULE_VERSION); | |
35 | ||
adddc32d SV |
36 | /* Heuristic for the number of times to exponentially backoff and |
37 | * retry sending an LDC trigger when EAGAIN is encountered | |
38 | */ | |
39 | #define VNET_MAX_RETRIES 10 | |
40 | ||
d1015645 SV |
41 | static int __vnet_tx_trigger(struct vnet_port *port, u32 start); |
42 | ||
4c521e42 DM |
43 | /* Ordered from largest major to lowest */ |
44 | static struct vio_version vnet_versions[] = { | |
e4defc77 | 45 | { .major = 1, .minor = 6 }, |
4c521e42 DM |
46 | { .major = 1, .minor = 0 }, |
47 | }; | |
48 | ||
49 | static inline u32 vnet_tx_dring_avail(struct vio_dring_state *dr) | |
50 | { | |
51 | return vio_dring_avail(dr, VNET_TX_RING_SIZE); | |
52 | } | |
53 | ||
54 | static int vnet_handle_unknown(struct vnet_port *port, void *arg) | |
55 | { | |
56 | struct vio_msg_tag *pkt = arg; | |
57 | ||
4d5870ec | 58 | pr_err("Received unknown msg [%02x:%02x:%04x:%08x]\n", |
4c521e42 | 59 | pkt->type, pkt->stype, pkt->stype_env, pkt->sid); |
4d5870ec | 60 | pr_err("Resetting connection\n"); |
4c521e42 DM |
61 | |
62 | ldc_disconnect(port->vio.lp); | |
63 | ||
64 | return -ECONNRESET; | |
65 | } | |
66 | ||
67 | static int vnet_send_attr(struct vio_driver_state *vio) | |
68 | { | |
69 | struct vnet_port *port = to_vnet_port(vio); | |
70 | struct net_device *dev = port->vp->dev; | |
71 | struct vio_net_attr_info pkt; | |
e4defc77 | 72 | int framelen = ETH_FRAME_LEN; |
4c521e42 DM |
73 | int i; |
74 | ||
75 | memset(&pkt, 0, sizeof(pkt)); | |
76 | pkt.tag.type = VIO_TYPE_CTRL; | |
77 | pkt.tag.stype = VIO_SUBTYPE_INFO; | |
78 | pkt.tag.stype_env = VIO_ATTR_INFO; | |
79 | pkt.tag.sid = vio_send_sid(vio); | |
e4defc77 DS |
80 | if (vio_version_before(vio, 1, 2)) |
81 | pkt.xfer_mode = VIO_DRING_MODE; | |
82 | else | |
83 | pkt.xfer_mode = VIO_NEW_DRING_MODE; | |
4c521e42 DM |
84 | pkt.addr_type = VNET_ADDR_ETHERMAC; |
85 | pkt.ack_freq = 0; | |
86 | for (i = 0; i < 6; i++) | |
87 | pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8); | |
e4defc77 DS |
88 | if (vio_version_after(vio, 1, 3)) { |
89 | if (port->rmtu) { | |
90 | port->rmtu = min(VNET_MAXPACKET, port->rmtu); | |
91 | pkt.mtu = port->rmtu; | |
92 | } else { | |
93 | port->rmtu = VNET_MAXPACKET; | |
94 | pkt.mtu = port->rmtu; | |
95 | } | |
96 | if (vio_version_after_eq(vio, 1, 6)) | |
97 | pkt.options = VIO_TX_DRING; | |
98 | } else if (vio_version_before(vio, 1, 3)) { | |
99 | pkt.mtu = framelen; | |
100 | } else { /* v1.3 */ | |
101 | pkt.mtu = framelen + VLAN_HLEN; | |
102 | } | |
103 | ||
104 | pkt.plnk_updt = PHYSLINK_UPDATE_NONE; | |
105 | pkt.cflags = 0; | |
4c521e42 DM |
106 | |
107 | viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] " | |
e4defc77 DS |
108 | "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] " |
109 | "cflags[0x%04x] lso_max[%u]\n", | |
4c521e42 | 110 | pkt.xfer_mode, pkt.addr_type, |
e4defc77 DS |
111 | (unsigned long long)pkt.addr, |
112 | pkt.ack_freq, pkt.plnk_updt, pkt.options, | |
113 | (unsigned long long)pkt.mtu, pkt.cflags, pkt.ipv4_lso_maxlen); | |
114 | ||
4c521e42 DM |
115 | |
116 | return vio_ldc_send(vio, &pkt, sizeof(pkt)); | |
117 | } | |
118 | ||
119 | static int handle_attr_info(struct vio_driver_state *vio, | |
120 | struct vio_net_attr_info *pkt) | |
121 | { | |
e4defc77 DS |
122 | struct vnet_port *port = to_vnet_port(vio); |
123 | u64 localmtu; | |
124 | u8 xfer_mode; | |
125 | ||
126 | viodbg(HS, "GOT NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] " | |
127 | "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] " | |
128 | " (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n", | |
4c521e42 | 129 | pkt->xfer_mode, pkt->addr_type, |
e4defc77 DS |
130 | (unsigned long long)pkt->addr, |
131 | pkt->ack_freq, pkt->plnk_updt, pkt->options, | |
132 | (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags, | |
133 | pkt->ipv4_lso_maxlen); | |
4c521e42 DM |
134 | |
135 | pkt->tag.sid = vio_send_sid(vio); | |
136 | ||
e4defc77 DS |
137 | xfer_mode = pkt->xfer_mode; |
138 | /* for version < 1.2, VIO_DRING_MODE = 0x3 and no bitmask */ | |
139 | if (vio_version_before(vio, 1, 2) && xfer_mode == VIO_DRING_MODE) | |
140 | xfer_mode = VIO_NEW_DRING_MODE; | |
141 | ||
142 | /* MTU negotiation: | |
143 | * < v1.3 - ETH_FRAME_LEN exactly | |
144 | * > v1.3 - MIN(pkt.mtu, VNET_MAXPACKET, port->rmtu) and change | |
145 | * pkt->mtu for ACK | |
146 | * = v1.3 - ETH_FRAME_LEN + VLAN_HLEN exactly | |
147 | */ | |
148 | if (vio_version_before(vio, 1, 3)) { | |
149 | localmtu = ETH_FRAME_LEN; | |
150 | } else if (vio_version_after(vio, 1, 3)) { | |
151 | localmtu = port->rmtu ? port->rmtu : VNET_MAXPACKET; | |
152 | localmtu = min(pkt->mtu, localmtu); | |
153 | pkt->mtu = localmtu; | |
154 | } else { /* v1.3 */ | |
155 | localmtu = ETH_FRAME_LEN + VLAN_HLEN; | |
156 | } | |
157 | port->rmtu = localmtu; | |
158 | ||
159 | /* for version >= 1.6, ACK packet mode we support */ | |
160 | if (vio_version_after_eq(vio, 1, 6)) { | |
161 | pkt->xfer_mode = VIO_NEW_DRING_MODE; | |
162 | pkt->options = VIO_TX_DRING; | |
163 | } | |
164 | ||
165 | if (!(xfer_mode | VIO_NEW_DRING_MODE) || | |
4c521e42 | 166 | pkt->addr_type != VNET_ADDR_ETHERMAC || |
e4defc77 | 167 | pkt->mtu != localmtu) { |
4c521e42 DM |
168 | viodbg(HS, "SEND NET ATTR NACK\n"); |
169 | ||
170 | pkt->tag.stype = VIO_SUBTYPE_NACK; | |
171 | ||
172 | (void) vio_ldc_send(vio, pkt, sizeof(*pkt)); | |
173 | ||
174 | return -ECONNRESET; | |
175 | } else { | |
e4defc77 DS |
176 | viodbg(HS, "SEND NET ATTR ACK xmode[0x%x] atype[0x%x] " |
177 | "addr[%llx] ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] " | |
178 | "mtu[%llu] (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n", | |
179 | pkt->xfer_mode, pkt->addr_type, | |
180 | (unsigned long long)pkt->addr, | |
181 | pkt->ack_freq, pkt->plnk_updt, pkt->options, | |
182 | (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags, | |
183 | pkt->ipv4_lso_maxlen); | |
4c521e42 DM |
184 | |
185 | pkt->tag.stype = VIO_SUBTYPE_ACK; | |
186 | ||
187 | return vio_ldc_send(vio, pkt, sizeof(*pkt)); | |
188 | } | |
189 | ||
190 | } | |
191 | ||
192 | static int handle_attr_ack(struct vio_driver_state *vio, | |
193 | struct vio_net_attr_info *pkt) | |
194 | { | |
195 | viodbg(HS, "GOT NET ATTR ACK\n"); | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
200 | static int handle_attr_nack(struct vio_driver_state *vio, | |
201 | struct vio_net_attr_info *pkt) | |
202 | { | |
203 | viodbg(HS, "GOT NET ATTR NACK\n"); | |
204 | ||
205 | return -ECONNRESET; | |
206 | } | |
207 | ||
208 | static int vnet_handle_attr(struct vio_driver_state *vio, void *arg) | |
209 | { | |
210 | struct vio_net_attr_info *pkt = arg; | |
211 | ||
212 | switch (pkt->tag.stype) { | |
213 | case VIO_SUBTYPE_INFO: | |
214 | return handle_attr_info(vio, pkt); | |
215 | ||
216 | case VIO_SUBTYPE_ACK: | |
217 | return handle_attr_ack(vio, pkt); | |
218 | ||
219 | case VIO_SUBTYPE_NACK: | |
220 | return handle_attr_nack(vio, pkt); | |
221 | ||
222 | default: | |
223 | return -ECONNRESET; | |
224 | } | |
225 | } | |
226 | ||
227 | static void vnet_handshake_complete(struct vio_driver_state *vio) | |
228 | { | |
229 | struct vio_dring_state *dr; | |
230 | ||
231 | dr = &vio->drings[VIO_DRIVER_RX_RING]; | |
232 | dr->snd_nxt = dr->rcv_nxt = 1; | |
233 | ||
234 | dr = &vio->drings[VIO_DRIVER_TX_RING]; | |
235 | dr->snd_nxt = dr->rcv_nxt = 1; | |
236 | } | |
237 | ||
238 | /* The hypervisor interface that implements copying to/from imported | |
239 | * memory from another domain requires that copies are done to 8-byte | |
240 | * aligned buffers, and that the lengths of such copies are also 8-byte | |
241 | * multiples. | |
242 | * | |
243 | * So we align skb->data to an 8-byte multiple and pad-out the data | |
244 | * area so we can round the copy length up to the next multiple of | |
245 | * 8 for the copy. | |
246 | * | |
247 | * The transmitter puts the actual start of the packet 6 bytes into | |
248 | * the buffer it sends over, so that the IP headers after the ethernet | |
249 | * header are aligned properly. These 6 bytes are not in the descriptor | |
250 | * length, they are simply implied. This offset is represented using | |
251 | * the VNET_PACKET_SKIP macro. | |
252 | */ | |
253 | static struct sk_buff *alloc_and_align_skb(struct net_device *dev, | |
254 | unsigned int len) | |
255 | { | |
256 | struct sk_buff *skb = netdev_alloc_skb(dev, len+VNET_PACKET_SKIP+8+8); | |
257 | unsigned long addr, off; | |
258 | ||
259 | if (unlikely(!skb)) | |
260 | return NULL; | |
261 | ||
262 | addr = (unsigned long) skb->data; | |
263 | off = ((addr + 7UL) & ~7UL) - addr; | |
264 | if (off) | |
265 | skb_reserve(skb, off); | |
266 | ||
267 | return skb; | |
268 | } | |
269 | ||
270 | static int vnet_rx_one(struct vnet_port *port, unsigned int len, | |
271 | struct ldc_trans_cookie *cookies, int ncookies) | |
272 | { | |
273 | struct net_device *dev = port->vp->dev; | |
274 | unsigned int copy_len; | |
275 | struct sk_buff *skb; | |
276 | int err; | |
277 | ||
278 | err = -EMSGSIZE; | |
e4defc77 | 279 | if (unlikely(len < ETH_ZLEN || len > port->rmtu)) { |
4c521e42 DM |
280 | dev->stats.rx_length_errors++; |
281 | goto out_dropped; | |
282 | } | |
283 | ||
284 | skb = alloc_and_align_skb(dev, len); | |
285 | err = -ENOMEM; | |
286 | if (unlikely(!skb)) { | |
287 | dev->stats.rx_missed_errors++; | |
288 | goto out_dropped; | |
289 | } | |
290 | ||
291 | copy_len = (len + VNET_PACKET_SKIP + 7U) & ~7U; | |
292 | skb_put(skb, copy_len); | |
293 | err = ldc_copy(port->vio.lp, LDC_COPY_IN, | |
294 | skb->data, copy_len, 0, | |
295 | cookies, ncookies); | |
296 | if (unlikely(err < 0)) { | |
297 | dev->stats.rx_frame_errors++; | |
298 | goto out_free_skb; | |
299 | } | |
300 | ||
301 | skb_pull(skb, VNET_PACKET_SKIP); | |
302 | skb_trim(skb, len); | |
303 | skb->protocol = eth_type_trans(skb, dev); | |
304 | ||
305 | dev->stats.rx_packets++; | |
306 | dev->stats.rx_bytes += len; | |
307 | ||
308 | netif_rx(skb); | |
309 | ||
310 | return 0; | |
311 | ||
312 | out_free_skb: | |
313 | kfree_skb(skb); | |
314 | ||
315 | out_dropped: | |
316 | dev->stats.rx_dropped++; | |
317 | return err; | |
318 | } | |
319 | ||
320 | static int vnet_send_ack(struct vnet_port *port, struct vio_dring_state *dr, | |
321 | u32 start, u32 end, u8 vio_dring_state) | |
322 | { | |
323 | struct vio_dring_data hdr = { | |
324 | .tag = { | |
325 | .type = VIO_TYPE_DATA, | |
326 | .stype = VIO_SUBTYPE_ACK, | |
327 | .stype_env = VIO_DRING_DATA, | |
328 | .sid = vio_send_sid(&port->vio), | |
329 | }, | |
330 | .dring_ident = dr->ident, | |
331 | .start_idx = start, | |
332 | .end_idx = end, | |
333 | .state = vio_dring_state, | |
334 | }; | |
335 | int err, delay; | |
adddc32d | 336 | int retries = 0; |
4c521e42 DM |
337 | |
338 | hdr.seq = dr->snd_nxt; | |
339 | delay = 1; | |
340 | do { | |
341 | err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr)); | |
342 | if (err > 0) { | |
343 | dr->snd_nxt++; | |
344 | break; | |
345 | } | |
346 | udelay(delay); | |
347 | if ((delay <<= 1) > 128) | |
348 | delay = 128; | |
adddc32d SV |
349 | if (retries++ > VNET_MAX_RETRIES) { |
350 | pr_info("ECONNRESET %x:%x:%x:%x:%x:%x\n", | |
351 | port->raddr[0], port->raddr[1], | |
352 | port->raddr[2], port->raddr[3], | |
353 | port->raddr[4], port->raddr[5]); | |
d1015645 | 354 | break; |
adddc32d | 355 | } |
4c521e42 DM |
356 | } while (err == -EAGAIN); |
357 | ||
d1015645 SV |
358 | if (err <= 0 && vio_dring_state == VIO_DRING_STOPPED) { |
359 | port->stop_rx_idx = end; | |
360 | port->stop_rx = true; | |
361 | } else { | |
362 | port->stop_rx_idx = 0; | |
363 | port->stop_rx = false; | |
364 | } | |
365 | ||
4c521e42 DM |
366 | return err; |
367 | } | |
368 | ||
369 | static u32 next_idx(u32 idx, struct vio_dring_state *dr) | |
370 | { | |
371 | if (++idx == dr->num_entries) | |
372 | idx = 0; | |
373 | return idx; | |
374 | } | |
375 | ||
376 | static u32 prev_idx(u32 idx, struct vio_dring_state *dr) | |
377 | { | |
378 | if (idx == 0) | |
379 | idx = dr->num_entries - 1; | |
380 | else | |
381 | idx--; | |
382 | ||
383 | return idx; | |
384 | } | |
385 | ||
386 | static struct vio_net_desc *get_rx_desc(struct vnet_port *port, | |
387 | struct vio_dring_state *dr, | |
388 | u32 index) | |
389 | { | |
390 | struct vio_net_desc *desc = port->vio.desc_buf; | |
391 | int err; | |
392 | ||
393 | err = ldc_get_dring_entry(port->vio.lp, desc, dr->entry_size, | |
394 | (index * dr->entry_size), | |
395 | dr->cookies, dr->ncookies); | |
396 | if (err < 0) | |
397 | return ERR_PTR(err); | |
398 | ||
399 | return desc; | |
400 | } | |
401 | ||
402 | static int put_rx_desc(struct vnet_port *port, | |
403 | struct vio_dring_state *dr, | |
404 | struct vio_net_desc *desc, | |
405 | u32 index) | |
406 | { | |
407 | int err; | |
408 | ||
409 | err = ldc_put_dring_entry(port->vio.lp, desc, dr->entry_size, | |
410 | (index * dr->entry_size), | |
411 | dr->cookies, dr->ncookies); | |
412 | if (err < 0) | |
413 | return err; | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
418 | static int vnet_walk_rx_one(struct vnet_port *port, | |
419 | struct vio_dring_state *dr, | |
420 | u32 index, int *needs_ack) | |
421 | { | |
422 | struct vio_net_desc *desc = get_rx_desc(port, dr, index); | |
423 | struct vio_driver_state *vio = &port->vio; | |
424 | int err; | |
425 | ||
426 | if (IS_ERR(desc)) | |
427 | return PTR_ERR(desc); | |
428 | ||
78dcff7b DS |
429 | if (desc->hdr.state != VIO_DESC_READY) |
430 | return 1; | |
431 | ||
432 | rmb(); | |
433 | ||
3f4528d6 | 434 | viodbg(DATA, "vio_walk_rx_one desc[%02x:%02x:%08x:%08x:%llx:%llx]\n", |
4c521e42 DM |
435 | desc->hdr.state, desc->hdr.ack, |
436 | desc->size, desc->ncookies, | |
437 | desc->cookies[0].cookie_addr, | |
438 | desc->cookies[0].cookie_size); | |
439 | ||
4c521e42 DM |
440 | err = vnet_rx_one(port, desc->size, desc->cookies, desc->ncookies); |
441 | if (err == -ECONNRESET) | |
442 | return err; | |
443 | desc->hdr.state = VIO_DESC_DONE; | |
444 | err = put_rx_desc(port, dr, desc, index); | |
445 | if (err < 0) | |
446 | return err; | |
447 | *needs_ack = desc->hdr.ack; | |
448 | return 0; | |
449 | } | |
450 | ||
451 | static int vnet_walk_rx(struct vnet_port *port, struct vio_dring_state *dr, | |
452 | u32 start, u32 end) | |
453 | { | |
454 | struct vio_driver_state *vio = &port->vio; | |
455 | int ack_start = -1, ack_end = -1; | |
456 | ||
457 | end = (end == (u32) -1) ? prev_idx(start, dr) : next_idx(end, dr); | |
458 | ||
459 | viodbg(DATA, "vnet_walk_rx start[%08x] end[%08x]\n", start, end); | |
460 | ||
461 | while (start != end) { | |
462 | int ack = 0, err = vnet_walk_rx_one(port, dr, start, &ack); | |
463 | if (err == -ECONNRESET) | |
464 | return err; | |
465 | if (err != 0) | |
466 | break; | |
467 | if (ack_start == -1) | |
468 | ack_start = start; | |
469 | ack_end = start; | |
470 | start = next_idx(start, dr); | |
471 | if (ack && start != end) { | |
472 | err = vnet_send_ack(port, dr, ack_start, ack_end, | |
473 | VIO_DRING_ACTIVE); | |
474 | if (err == -ECONNRESET) | |
475 | return err; | |
476 | ack_start = -1; | |
477 | } | |
478 | } | |
479 | if (unlikely(ack_start == -1)) | |
480 | ack_start = ack_end = prev_idx(start, dr); | |
481 | return vnet_send_ack(port, dr, ack_start, ack_end, VIO_DRING_STOPPED); | |
482 | } | |
483 | ||
484 | static int vnet_rx(struct vnet_port *port, void *msgbuf) | |
485 | { | |
486 | struct vio_dring_data *pkt = msgbuf; | |
487 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_RX_RING]; | |
488 | struct vio_driver_state *vio = &port->vio; | |
489 | ||
3f4528d6 | 490 | viodbg(DATA, "vnet_rx stype_env[%04x] seq[%016llx] rcv_nxt[%016llx]\n", |
4c521e42 DM |
491 | pkt->tag.stype_env, pkt->seq, dr->rcv_nxt); |
492 | ||
493 | if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA)) | |
494 | return 0; | |
495 | if (unlikely(pkt->seq != dr->rcv_nxt)) { | |
4d5870ec JP |
496 | pr_err("RX out of sequence seq[0x%llx] rcv_nxt[0x%llx]\n", |
497 | pkt->seq, dr->rcv_nxt); | |
4c521e42 DM |
498 | return 0; |
499 | } | |
500 | ||
501 | dr->rcv_nxt++; | |
502 | ||
503 | /* XXX Validate pkt->start_idx and pkt->end_idx XXX */ | |
504 | ||
505 | return vnet_walk_rx(port, dr, pkt->start_idx, pkt->end_idx); | |
506 | } | |
507 | ||
508 | static int idx_is_pending(struct vio_dring_state *dr, u32 end) | |
509 | { | |
510 | u32 idx = dr->cons; | |
511 | int found = 0; | |
512 | ||
513 | while (idx != dr->prod) { | |
514 | if (idx == end) { | |
515 | found = 1; | |
516 | break; | |
517 | } | |
518 | idx = next_idx(idx, dr); | |
519 | } | |
520 | return found; | |
521 | } | |
522 | ||
523 | static int vnet_ack(struct vnet_port *port, void *msgbuf) | |
524 | { | |
525 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
526 | struct vio_dring_data *pkt = msgbuf; | |
527 | struct net_device *dev; | |
528 | struct vnet *vp; | |
529 | u32 end; | |
d1015645 | 530 | struct vio_net_desc *desc; |
4c521e42 DM |
531 | if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA)) |
532 | return 0; | |
533 | ||
534 | end = pkt->end_idx; | |
535 | if (unlikely(!idx_is_pending(dr, end))) | |
536 | return 0; | |
537 | ||
d1015645 SV |
538 | /* sync for race conditions with vnet_start_xmit() and tell xmit it |
539 | * is time to send a trigger. | |
540 | */ | |
4c521e42 | 541 | dr->cons = next_idx(end, dr); |
d1015645 SV |
542 | desc = vio_dring_entry(dr, dr->cons); |
543 | if (desc->hdr.state == VIO_DESC_READY && port->start_cons) { | |
544 | /* vnet_start_xmit() just populated this dring but missed | |
545 | * sending the "start" LDC message to the consumer. | |
546 | * Send a "start" trigger on its behalf. | |
547 | */ | |
548 | if (__vnet_tx_trigger(port, dr->cons) > 0) | |
549 | port->start_cons = false; | |
550 | else | |
551 | port->start_cons = true; | |
552 | } else { | |
553 | port->start_cons = true; | |
554 | } | |
555 | ||
4c521e42 DM |
556 | |
557 | vp = port->vp; | |
558 | dev = vp->dev; | |
559 | if (unlikely(netif_queue_stopped(dev) && | |
560 | vnet_tx_dring_avail(dr) >= VNET_TX_WAKEUP_THRESH(dr))) | |
561 | return 1; | |
562 | ||
563 | return 0; | |
564 | } | |
565 | ||
566 | static int vnet_nack(struct vnet_port *port, void *msgbuf) | |
567 | { | |
568 | /* XXX just reset or similar XXX */ | |
569 | return 0; | |
570 | } | |
571 | ||
028ebff2 DM |
572 | static int handle_mcast(struct vnet_port *port, void *msgbuf) |
573 | { | |
574 | struct vio_net_mcast_info *pkt = msgbuf; | |
575 | ||
576 | if (pkt->tag.stype != VIO_SUBTYPE_ACK) | |
4d5870ec | 577 | pr_err("%s: Got unexpected MCAST reply [%02x:%02x:%04x:%08x]\n", |
028ebff2 DM |
578 | port->vp->dev->name, |
579 | pkt->tag.type, | |
580 | pkt->tag.stype, | |
581 | pkt->tag.stype_env, | |
582 | pkt->tag.sid); | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
1d311ad2 | 587 | static void maybe_tx_wakeup(unsigned long param) |
4c521e42 | 588 | { |
1d311ad2 | 589 | struct vnet *vp = (struct vnet *)param; |
4c521e42 DM |
590 | struct net_device *dev = vp->dev; |
591 | ||
592 | netif_tx_lock(dev); | |
593 | if (likely(netif_queue_stopped(dev))) { | |
594 | struct vnet_port *port; | |
595 | int wake = 1; | |
596 | ||
597 | list_for_each_entry(port, &vp->port_list, list) { | |
598 | struct vio_dring_state *dr; | |
599 | ||
600 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
601 | if (vnet_tx_dring_avail(dr) < | |
602 | VNET_TX_WAKEUP_THRESH(dr)) { | |
603 | wake = 0; | |
604 | break; | |
605 | } | |
606 | } | |
607 | if (wake) | |
608 | netif_wake_queue(dev); | |
609 | } | |
610 | netif_tx_unlock(dev); | |
611 | } | |
612 | ||
613 | static void vnet_event(void *arg, int event) | |
614 | { | |
615 | struct vnet_port *port = arg; | |
616 | struct vio_driver_state *vio = &port->vio; | |
617 | unsigned long flags; | |
618 | int tx_wakeup, err; | |
619 | ||
620 | spin_lock_irqsave(&vio->lock, flags); | |
621 | ||
622 | if (unlikely(event == LDC_EVENT_RESET || | |
623 | event == LDC_EVENT_UP)) { | |
624 | vio_link_state_change(vio, event); | |
625 | spin_unlock_irqrestore(&vio->lock, flags); | |
626 | ||
e4defc77 DS |
627 | if (event == LDC_EVENT_RESET) { |
628 | port->rmtu = 0; | |
d762acdb | 629 | vio_port_up(vio); |
e4defc77 | 630 | } |
4c521e42 DM |
631 | return; |
632 | } | |
633 | ||
634 | if (unlikely(event != LDC_EVENT_DATA_READY)) { | |
fe3881cf | 635 | pr_warn("Unexpected LDC event %d\n", event); |
4c521e42 DM |
636 | spin_unlock_irqrestore(&vio->lock, flags); |
637 | return; | |
638 | } | |
639 | ||
640 | tx_wakeup = err = 0; | |
641 | while (1) { | |
642 | union { | |
643 | struct vio_msg_tag tag; | |
644 | u64 raw[8]; | |
645 | } msgbuf; | |
646 | ||
647 | err = ldc_read(vio->lp, &msgbuf, sizeof(msgbuf)); | |
648 | if (unlikely(err < 0)) { | |
649 | if (err == -ECONNRESET) | |
650 | vio_conn_reset(vio); | |
651 | break; | |
652 | } | |
653 | if (err == 0) | |
654 | break; | |
655 | viodbg(DATA, "TAG [%02x:%02x:%04x:%08x]\n", | |
656 | msgbuf.tag.type, | |
657 | msgbuf.tag.stype, | |
658 | msgbuf.tag.stype_env, | |
659 | msgbuf.tag.sid); | |
660 | err = vio_validate_sid(vio, &msgbuf.tag); | |
661 | if (err < 0) | |
662 | break; | |
663 | ||
664 | if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) { | |
665 | if (msgbuf.tag.stype == VIO_SUBTYPE_INFO) { | |
666 | err = vnet_rx(port, &msgbuf); | |
667 | } else if (msgbuf.tag.stype == VIO_SUBTYPE_ACK) { | |
668 | err = vnet_ack(port, &msgbuf); | |
669 | if (err > 0) | |
670 | tx_wakeup |= err; | |
671 | } else if (msgbuf.tag.stype == VIO_SUBTYPE_NACK) { | |
672 | err = vnet_nack(port, &msgbuf); | |
673 | } | |
674 | } else if (msgbuf.tag.type == VIO_TYPE_CTRL) { | |
028ebff2 DM |
675 | if (msgbuf.tag.stype_env == VNET_MCAST_INFO) |
676 | err = handle_mcast(port, &msgbuf); | |
677 | else | |
678 | err = vio_control_pkt_engine(vio, &msgbuf); | |
4c521e42 DM |
679 | if (err) |
680 | break; | |
681 | } else { | |
682 | err = vnet_handle_unknown(port, &msgbuf); | |
683 | } | |
684 | if (err == -ECONNRESET) | |
685 | break; | |
686 | } | |
687 | spin_unlock(&vio->lock); | |
1d311ad2 SV |
688 | /* Kick off a tasklet to wake the queue. We cannot call |
689 | * maybe_tx_wakeup directly here because we could deadlock on | |
690 | * netif_tx_lock() with dev_watchdog() | |
691 | */ | |
4c521e42 | 692 | if (unlikely(tx_wakeup && err != -ECONNRESET)) |
1d311ad2 SV |
693 | tasklet_schedule(&port->vp->vnet_tx_wakeup); |
694 | ||
4c521e42 DM |
695 | local_irq_restore(flags); |
696 | } | |
697 | ||
d1015645 | 698 | static int __vnet_tx_trigger(struct vnet_port *port, u32 start) |
4c521e42 DM |
699 | { |
700 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
701 | struct vio_dring_data hdr = { | |
702 | .tag = { | |
703 | .type = VIO_TYPE_DATA, | |
704 | .stype = VIO_SUBTYPE_INFO, | |
705 | .stype_env = VIO_DRING_DATA, | |
706 | .sid = vio_send_sid(&port->vio), | |
707 | }, | |
708 | .dring_ident = dr->ident, | |
d1015645 | 709 | .start_idx = start, |
4c521e42 DM |
710 | .end_idx = (u32) -1, |
711 | }; | |
712 | int err, delay; | |
adddc32d | 713 | int retries = 0; |
4c521e42 | 714 | |
d1015645 SV |
715 | if (port->stop_rx) { |
716 | err = vnet_send_ack(port, | |
717 | &port->vio.drings[VIO_DRIVER_RX_RING], | |
718 | port->stop_rx_idx, -1, | |
719 | VIO_DRING_STOPPED); | |
720 | if (err <= 0) | |
721 | return err; | |
722 | } | |
723 | ||
4c521e42 DM |
724 | hdr.seq = dr->snd_nxt; |
725 | delay = 1; | |
726 | do { | |
727 | err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr)); | |
728 | if (err > 0) { | |
729 | dr->snd_nxt++; | |
730 | break; | |
731 | } | |
732 | udelay(delay); | |
733 | if ((delay <<= 1) > 128) | |
734 | delay = 128; | |
adddc32d SV |
735 | if (retries++ > VNET_MAX_RETRIES) |
736 | break; | |
4c521e42 DM |
737 | } while (err == -EAGAIN); |
738 | ||
739 | return err; | |
740 | } | |
741 | ||
8266f5fc DS |
742 | static inline bool port_is_up(struct vnet_port *vnet) |
743 | { | |
744 | struct vio_driver_state *vio = &vnet->vio; | |
745 | ||
746 | return !!(vio->hs_state & VIO_HS_COMPLETE); | |
747 | } | |
748 | ||
4c521e42 DM |
749 | struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb) |
750 | { | |
751 | unsigned int hash = vnet_hashfn(skb->data); | |
752 | struct hlist_head *hp = &vp->port_hash[hash]; | |
4c521e42 DM |
753 | struct vnet_port *port; |
754 | ||
b67bfe0d | 755 | hlist_for_each_entry(port, hp, hash) { |
8266f5fc DS |
756 | if (!port_is_up(port)) |
757 | continue; | |
2e42e474 | 758 | if (ether_addr_equal(port->raddr, skb->data)) |
4c521e42 DM |
759 | return port; |
760 | } | |
8266f5fc DS |
761 | list_for_each_entry(port, &vp->port_list, list) { |
762 | if (!port->switch_port) | |
763 | continue; | |
764 | if (!port_is_up(port)) | |
765 | continue; | |
766 | return port; | |
767 | } | |
768 | return NULL; | |
4c521e42 DM |
769 | } |
770 | ||
771 | struct vnet_port *tx_port_find(struct vnet *vp, struct sk_buff *skb) | |
772 | { | |
773 | struct vnet_port *ret; | |
774 | unsigned long flags; | |
775 | ||
776 | spin_lock_irqsave(&vp->lock, flags); | |
777 | ret = __tx_port_find(vp, skb); | |
778 | spin_unlock_irqrestore(&vp->lock, flags); | |
779 | ||
780 | return ret; | |
781 | } | |
782 | ||
8e845f4c DS |
783 | static struct sk_buff *vnet_clean_tx_ring(struct vnet_port *port, |
784 | unsigned *pending) | |
785 | { | |
786 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
787 | struct sk_buff *skb = NULL; | |
788 | int i, txi; | |
789 | ||
790 | *pending = 0; | |
791 | ||
792 | txi = dr->prod-1; | |
793 | if (txi < 0) | |
794 | txi = VNET_TX_RING_SIZE-1; | |
795 | ||
796 | for (i = 0; i < VNET_TX_RING_SIZE; ++i) { | |
797 | struct vio_net_desc *d; | |
798 | ||
799 | d = vio_dring_entry(dr, txi); | |
800 | ||
801 | if (d->hdr.state == VIO_DESC_DONE) { | |
802 | if (port->tx_bufs[txi].skb) { | |
803 | BUG_ON(port->tx_bufs[txi].skb->next); | |
804 | ||
805 | port->tx_bufs[txi].skb->next = skb; | |
806 | skb = port->tx_bufs[txi].skb; | |
807 | port->tx_bufs[txi].skb = NULL; | |
808 | ||
809 | ldc_unmap(port->vio.lp, | |
810 | port->tx_bufs[txi].cookies, | |
811 | port->tx_bufs[txi].ncookies); | |
812 | } | |
813 | d->hdr.state = VIO_DESC_FREE; | |
814 | } else if (d->hdr.state == VIO_DESC_READY) { | |
815 | (*pending)++; | |
816 | } else if (d->hdr.state == VIO_DESC_FREE) { | |
817 | break; | |
818 | } | |
819 | --txi; | |
820 | if (txi < 0) | |
821 | txi = VNET_TX_RING_SIZE-1; | |
822 | } | |
823 | return skb; | |
824 | } | |
825 | ||
826 | static inline void vnet_free_skbs(struct sk_buff *skb) | |
827 | { | |
828 | struct sk_buff *next; | |
829 | ||
830 | while (skb) { | |
831 | next = skb->next; | |
832 | skb->next = NULL; | |
833 | dev_kfree_skb(skb); | |
834 | skb = next; | |
835 | } | |
836 | } | |
837 | ||
838 | static void vnet_clean_timer_expire(unsigned long port0) | |
839 | { | |
840 | struct vnet_port *port = (struct vnet_port *)port0; | |
841 | struct sk_buff *freeskbs; | |
842 | unsigned pending; | |
843 | unsigned long flags; | |
844 | ||
845 | spin_lock_irqsave(&port->vio.lock, flags); | |
846 | freeskbs = vnet_clean_tx_ring(port, &pending); | |
847 | spin_unlock_irqrestore(&port->vio.lock, flags); | |
848 | ||
849 | vnet_free_skbs(freeskbs); | |
850 | ||
851 | if (pending) | |
852 | (void)mod_timer(&port->clean_timer, | |
853 | jiffies + VNET_CLEAN_TIMEOUT); | |
854 | else | |
855 | del_timer(&port->clean_timer); | |
856 | } | |
857 | ||
858 | static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, void **pstart, | |
859 | int *plen) | |
860 | { | |
861 | struct sk_buff *nskb; | |
862 | int len, pad; | |
863 | ||
864 | len = skb->len; | |
865 | pad = 0; | |
866 | if (len < ETH_ZLEN) { | |
867 | pad += ETH_ZLEN - skb->len; | |
868 | len += pad; | |
869 | } | |
870 | len += VNET_PACKET_SKIP; | |
871 | pad += 8 - (len & 7); | |
872 | len += 8 - (len & 7); | |
873 | ||
874 | if (((unsigned long)skb->data & 7) != VNET_PACKET_SKIP || | |
875 | skb_tailroom(skb) < pad || | |
876 | skb_headroom(skb) < VNET_PACKET_SKIP) { | |
877 | nskb = alloc_and_align_skb(skb->dev, skb->len); | |
878 | skb_reserve(nskb, VNET_PACKET_SKIP); | |
879 | if (skb_copy_bits(skb, 0, nskb->data, skb->len)) { | |
880 | dev_kfree_skb(nskb); | |
881 | dev_kfree_skb(skb); | |
882 | return NULL; | |
883 | } | |
884 | (void)skb_put(nskb, skb->len); | |
885 | dev_kfree_skb(skb); | |
886 | skb = nskb; | |
887 | } | |
888 | ||
889 | *pstart = skb->data - VNET_PACKET_SKIP; | |
890 | *plen = len; | |
891 | return skb; | |
892 | } | |
893 | ||
4c521e42 DM |
894 | static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev) |
895 | { | |
896 | struct vnet *vp = netdev_priv(dev); | |
897 | struct vnet_port *port = tx_port_find(vp, skb); | |
898 | struct vio_dring_state *dr; | |
899 | struct vio_net_desc *d; | |
900 | unsigned long flags; | |
901 | unsigned int len; | |
8e845f4c DS |
902 | struct sk_buff *freeskbs = NULL; |
903 | int i, err, txi; | |
904 | void *start = NULL; | |
905 | int nlen = 0; | |
906 | unsigned pending = 0; | |
4c521e42 DM |
907 | |
908 | if (unlikely(!port)) | |
909 | goto out_dropped; | |
910 | ||
8e845f4c DS |
911 | skb = vnet_skb_shape(skb, &start, &nlen); |
912 | ||
913 | if (unlikely(!skb)) | |
914 | goto out_dropped; | |
915 | ||
4c521e42 DM |
916 | spin_lock_irqsave(&port->vio.lock, flags); |
917 | ||
918 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
919 | if (unlikely(vnet_tx_dring_avail(dr) < 2)) { | |
920 | if (!netif_queue_stopped(dev)) { | |
921 | netif_stop_queue(dev); | |
922 | ||
923 | /* This is a hard error, log it. */ | |
4d5870ec | 924 | netdev_err(dev, "BUG! Tx Ring full when queue awake!\n"); |
4c521e42 DM |
925 | dev->stats.tx_errors++; |
926 | } | |
927 | spin_unlock_irqrestore(&port->vio.lock, flags); | |
928 | return NETDEV_TX_BUSY; | |
929 | } | |
930 | ||
931 | d = vio_dring_cur(dr); | |
932 | ||
8e845f4c DS |
933 | txi = dr->prod; |
934 | ||
935 | freeskbs = vnet_clean_tx_ring(port, &pending); | |
936 | ||
937 | BUG_ON(port->tx_bufs[txi].skb); | |
4c521e42 DM |
938 | |
939 | len = skb->len; | |
8e845f4c | 940 | if (len < ETH_ZLEN) |
4c521e42 | 941 | len = ETH_ZLEN; |
8e845f4c DS |
942 | |
943 | port->tx_bufs[txi].skb = skb; | |
944 | skb = NULL; | |
945 | ||
946 | err = ldc_map_single(port->vio.lp, start, nlen, | |
947 | port->tx_bufs[txi].cookies, 2, | |
948 | (LDC_MAP_SHADOW | LDC_MAP_DIRECT | LDC_MAP_RW)); | |
949 | if (err < 0) { | |
950 | netdev_info(dev, "tx buffer map error %d\n", err); | |
951 | goto out_dropped_unlock; | |
4c521e42 | 952 | } |
8e845f4c | 953 | port->tx_bufs[txi].ncookies = err; |
4c521e42 | 954 | |
1f6394e3 SV |
955 | /* We don't rely on the ACKs to free the skb in vnet_start_xmit(), |
956 | * thus it is safe to not set VIO_ACK_ENABLE for each transmission: | |
957 | * the protocol itself does not require it as long as the peer | |
958 | * sends a VIO_SUBTYPE_ACK for VIO_DRING_STOPPED. | |
959 | * | |
960 | * An ACK for every packet in the ring is expensive as the | |
961 | * sending of LDC messages is slow and affects performance. | |
962 | */ | |
963 | d->hdr.ack = VIO_ACK_DISABLE; | |
4c521e42 | 964 | d->size = len; |
8e845f4c | 965 | d->ncookies = port->tx_bufs[txi].ncookies; |
4c521e42 | 966 | for (i = 0; i < d->ncookies; i++) |
8e845f4c | 967 | d->cookies[i] = port->tx_bufs[txi].cookies[i]; |
4c521e42 DM |
968 | |
969 | /* This has to be a non-SMP write barrier because we are writing | |
970 | * to memory which is shared with the peer LDOM. | |
971 | */ | |
972 | wmb(); | |
973 | ||
974 | d->hdr.state = VIO_DESC_READY; | |
975 | ||
d1015645 SV |
976 | /* Exactly one ldc "start" trigger (for dr->cons) needs to be sent |
977 | * to notify the consumer that some descriptors are READY. | |
978 | * After that "start" trigger, no additional triggers are needed until | |
979 | * a DRING_STOPPED is received from the consumer. The dr->cons field | |
980 | * (set up by vnet_ack()) has the value of the next dring index | |
981 | * that has not yet been ack-ed. We send a "start" trigger here | |
982 | * if, and only if, start_cons is true (reset it afterward). Conversely, | |
983 | * vnet_ack() should check if the dring corresponding to cons | |
984 | * is marked READY, but start_cons was false. | |
985 | * If so, vnet_ack() should send out the missed "start" trigger. | |
986 | * | |
987 | * Note that the wmb() above makes sure the cookies et al. are | |
988 | * not globally visible before the VIO_DESC_READY, and that the | |
989 | * stores are ordered correctly by the compiler. The consumer will | |
990 | * not proceed until the VIO_DESC_READY is visible assuring that | |
991 | * the consumer does not observe anything related to descriptors | |
992 | * out of order. The HV trap from the LDC start trigger is the | |
993 | * producer to consumer announcement that work is available to the | |
994 | * consumer | |
995 | */ | |
996 | if (!port->start_cons) | |
997 | goto ldc_start_done; /* previous trigger suffices */ | |
998 | ||
999 | err = __vnet_tx_trigger(port, dr->cons); | |
4c521e42 | 1000 | if (unlikely(err < 0)) { |
4d5870ec | 1001 | netdev_info(dev, "TX trigger error %d\n", err); |
4c521e42 DM |
1002 | d->hdr.state = VIO_DESC_FREE; |
1003 | dev->stats.tx_carrier_errors++; | |
1004 | goto out_dropped_unlock; | |
1005 | } | |
1006 | ||
d1015645 SV |
1007 | ldc_start_done: |
1008 | port->start_cons = false; | |
1009 | ||
4c521e42 | 1010 | dev->stats.tx_packets++; |
8e845f4c | 1011 | dev->stats.tx_bytes += port->tx_bufs[txi].skb->len; |
4c521e42 DM |
1012 | |
1013 | dr->prod = (dr->prod + 1) & (VNET_TX_RING_SIZE - 1); | |
1014 | if (unlikely(vnet_tx_dring_avail(dr) < 2)) { | |
1015 | netif_stop_queue(dev); | |
1016 | if (vnet_tx_dring_avail(dr) > VNET_TX_WAKEUP_THRESH(dr)) | |
1017 | netif_wake_queue(dev); | |
1018 | } | |
1019 | ||
1020 | spin_unlock_irqrestore(&port->vio.lock, flags); | |
1021 | ||
8e845f4c DS |
1022 | vnet_free_skbs(freeskbs); |
1023 | ||
1024 | (void)mod_timer(&port->clean_timer, jiffies + VNET_CLEAN_TIMEOUT); | |
4c521e42 | 1025 | |
4c521e42 DM |
1026 | return NETDEV_TX_OK; |
1027 | ||
1028 | out_dropped_unlock: | |
1029 | spin_unlock_irqrestore(&port->vio.lock, flags); | |
1030 | ||
1031 | out_dropped: | |
8e845f4c DS |
1032 | if (skb) |
1033 | dev_kfree_skb(skb); | |
1034 | vnet_free_skbs(freeskbs); | |
1035 | if (pending) | |
1036 | (void)mod_timer(&port->clean_timer, | |
1037 | jiffies + VNET_CLEAN_TIMEOUT); | |
1038 | else | |
1039 | del_timer(&port->clean_timer); | |
4c521e42 DM |
1040 | dev->stats.tx_dropped++; |
1041 | return NETDEV_TX_OK; | |
1042 | } | |
1043 | ||
1044 | static void vnet_tx_timeout(struct net_device *dev) | |
1045 | { | |
1046 | /* XXX Implement me XXX */ | |
1047 | } | |
1048 | ||
1049 | static int vnet_open(struct net_device *dev) | |
1050 | { | |
1051 | netif_carrier_on(dev); | |
1052 | netif_start_queue(dev); | |
1053 | ||
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | static int vnet_close(struct net_device *dev) | |
1058 | { | |
1059 | netif_stop_queue(dev); | |
1060 | netif_carrier_off(dev); | |
1061 | ||
1062 | return 0; | |
1063 | } | |
1064 | ||
028ebff2 DM |
1065 | static struct vnet_mcast_entry *__vnet_mc_find(struct vnet *vp, u8 *addr) |
1066 | { | |
1067 | struct vnet_mcast_entry *m; | |
1068 | ||
1069 | for (m = vp->mcast_list; m; m = m->next) { | |
00fa4ce9 | 1070 | if (ether_addr_equal(m->addr, addr)) |
028ebff2 DM |
1071 | return m; |
1072 | } | |
1073 | return NULL; | |
1074 | } | |
1075 | ||
1076 | static void __update_mc_list(struct vnet *vp, struct net_device *dev) | |
1077 | { | |
22bedad3 | 1078 | struct netdev_hw_addr *ha; |
028ebff2 | 1079 | |
22bedad3 | 1080 | netdev_for_each_mc_addr(ha, dev) { |
028ebff2 DM |
1081 | struct vnet_mcast_entry *m; |
1082 | ||
22bedad3 | 1083 | m = __vnet_mc_find(vp, ha->addr); |
028ebff2 DM |
1084 | if (m) { |
1085 | m->hit = 1; | |
1086 | continue; | |
1087 | } | |
1088 | ||
1089 | if (!m) { | |
1090 | m = kzalloc(sizeof(*m), GFP_ATOMIC); | |
1091 | if (!m) | |
1092 | continue; | |
22bedad3 | 1093 | memcpy(m->addr, ha->addr, ETH_ALEN); |
028ebff2 DM |
1094 | m->hit = 1; |
1095 | ||
1096 | m->next = vp->mcast_list; | |
1097 | vp->mcast_list = m; | |
1098 | } | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | static void __send_mc_list(struct vnet *vp, struct vnet_port *port) | |
1103 | { | |
1104 | struct vio_net_mcast_info info; | |
1105 | struct vnet_mcast_entry *m, **pp; | |
1106 | int n_addrs; | |
1107 | ||
1108 | memset(&info, 0, sizeof(info)); | |
1109 | ||
1110 | info.tag.type = VIO_TYPE_CTRL; | |
1111 | info.tag.stype = VIO_SUBTYPE_INFO; | |
1112 | info.tag.stype_env = VNET_MCAST_INFO; | |
1113 | info.tag.sid = vio_send_sid(&port->vio); | |
1114 | info.set = 1; | |
1115 | ||
1116 | n_addrs = 0; | |
1117 | for (m = vp->mcast_list; m; m = m->next) { | |
1118 | if (m->sent) | |
1119 | continue; | |
1120 | m->sent = 1; | |
1121 | memcpy(&info.mcast_addr[n_addrs * ETH_ALEN], | |
1122 | m->addr, ETH_ALEN); | |
1123 | if (++n_addrs == VNET_NUM_MCAST) { | |
1124 | info.count = n_addrs; | |
1125 | ||
1126 | (void) vio_ldc_send(&port->vio, &info, | |
1127 | sizeof(info)); | |
1128 | n_addrs = 0; | |
1129 | } | |
1130 | } | |
1131 | if (n_addrs) { | |
1132 | info.count = n_addrs; | |
1133 | (void) vio_ldc_send(&port->vio, &info, sizeof(info)); | |
1134 | } | |
1135 | ||
1136 | info.set = 0; | |
1137 | ||
1138 | n_addrs = 0; | |
1139 | pp = &vp->mcast_list; | |
1140 | while ((m = *pp) != NULL) { | |
1141 | if (m->hit) { | |
1142 | m->hit = 0; | |
1143 | pp = &m->next; | |
1144 | continue; | |
1145 | } | |
1146 | ||
1147 | memcpy(&info.mcast_addr[n_addrs * ETH_ALEN], | |
1148 | m->addr, ETH_ALEN); | |
1149 | if (++n_addrs == VNET_NUM_MCAST) { | |
1150 | info.count = n_addrs; | |
1151 | (void) vio_ldc_send(&port->vio, &info, | |
1152 | sizeof(info)); | |
1153 | n_addrs = 0; | |
1154 | } | |
1155 | ||
1156 | *pp = m->next; | |
1157 | kfree(m); | |
1158 | } | |
1159 | if (n_addrs) { | |
1160 | info.count = n_addrs; | |
1161 | (void) vio_ldc_send(&port->vio, &info, sizeof(info)); | |
1162 | } | |
1163 | } | |
1164 | ||
4c521e42 DM |
1165 | static void vnet_set_rx_mode(struct net_device *dev) |
1166 | { | |
028ebff2 DM |
1167 | struct vnet *vp = netdev_priv(dev); |
1168 | struct vnet_port *port; | |
1169 | unsigned long flags; | |
1170 | ||
1171 | spin_lock_irqsave(&vp->lock, flags); | |
1172 | if (!list_empty(&vp->port_list)) { | |
1173 | port = list_entry(vp->port_list.next, struct vnet_port, list); | |
1174 | ||
1175 | if (port->switch_port) { | |
1176 | __update_mc_list(vp, dev); | |
1177 | __send_mc_list(vp, port); | |
1178 | } | |
1179 | } | |
1180 | spin_unlock_irqrestore(&vp->lock, flags); | |
4c521e42 DM |
1181 | } |
1182 | ||
1183 | static int vnet_change_mtu(struct net_device *dev, int new_mtu) | |
1184 | { | |
1185 | if (new_mtu != ETH_DATA_LEN) | |
1186 | return -EINVAL; | |
1187 | ||
1188 | dev->mtu = new_mtu; | |
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | static int vnet_set_mac_addr(struct net_device *dev, void *p) | |
1193 | { | |
1194 | return -EINVAL; | |
1195 | } | |
1196 | ||
1197 | static void vnet_get_drvinfo(struct net_device *dev, | |
1198 | struct ethtool_drvinfo *info) | |
1199 | { | |
7826d43f JP |
1200 | strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver)); |
1201 | strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version)); | |
4c521e42 DM |
1202 | } |
1203 | ||
1204 | static u32 vnet_get_msglevel(struct net_device *dev) | |
1205 | { | |
1206 | struct vnet *vp = netdev_priv(dev); | |
1207 | return vp->msg_enable; | |
1208 | } | |
1209 | ||
1210 | static void vnet_set_msglevel(struct net_device *dev, u32 value) | |
1211 | { | |
1212 | struct vnet *vp = netdev_priv(dev); | |
1213 | vp->msg_enable = value; | |
1214 | } | |
1215 | ||
1216 | static const struct ethtool_ops vnet_ethtool_ops = { | |
1217 | .get_drvinfo = vnet_get_drvinfo, | |
1218 | .get_msglevel = vnet_get_msglevel, | |
1219 | .set_msglevel = vnet_set_msglevel, | |
1220 | .get_link = ethtool_op_get_link, | |
4c521e42 DM |
1221 | }; |
1222 | ||
1223 | static void vnet_port_free_tx_bufs(struct vnet_port *port) | |
1224 | { | |
1225 | struct vio_dring_state *dr; | |
1226 | int i; | |
1227 | ||
1228 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
1229 | if (dr->base) { | |
1230 | ldc_free_exp_dring(port->vio.lp, dr->base, | |
1231 | (dr->entry_size * dr->num_entries), | |
1232 | dr->cookies, dr->ncookies); | |
1233 | dr->base = NULL; | |
1234 | dr->entry_size = 0; | |
1235 | dr->num_entries = 0; | |
1236 | dr->pending = 0; | |
1237 | dr->ncookies = 0; | |
1238 | } | |
1239 | ||
1240 | for (i = 0; i < VNET_TX_RING_SIZE; i++) { | |
8e845f4c DS |
1241 | struct vio_net_desc *d; |
1242 | void *skb = port->tx_bufs[i].skb; | |
4c521e42 | 1243 | |
8e845f4c | 1244 | if (!skb) |
4c521e42 DM |
1245 | continue; |
1246 | ||
8e845f4c DS |
1247 | d = vio_dring_entry(dr, i); |
1248 | if (d->hdr.state == VIO_DESC_READY) | |
1249 | pr_warn("active transmit buffers freed\n"); | |
1250 | ||
4c521e42 DM |
1251 | ldc_unmap(port->vio.lp, |
1252 | port->tx_bufs[i].cookies, | |
1253 | port->tx_bufs[i].ncookies); | |
8e845f4c DS |
1254 | dev_kfree_skb(skb); |
1255 | port->tx_bufs[i].skb = NULL; | |
1256 | d->hdr.state = VIO_DESC_FREE; | |
4c521e42 DM |
1257 | } |
1258 | } | |
1259 | ||
f73d12bd | 1260 | static int vnet_port_alloc_tx_bufs(struct vnet_port *port) |
4c521e42 DM |
1261 | { |
1262 | struct vio_dring_state *dr; | |
1263 | unsigned long len; | |
1264 | int i, err, ncookies; | |
1265 | void *dring; | |
1266 | ||
4c521e42 DM |
1267 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
1268 | ||
1269 | len = (VNET_TX_RING_SIZE * | |
1270 | (sizeof(struct vio_net_desc) + | |
1271 | (sizeof(struct ldc_trans_cookie) * 2))); | |
1272 | ||
1273 | ncookies = VIO_MAX_RING_COOKIES; | |
1274 | dring = ldc_alloc_exp_dring(port->vio.lp, len, | |
1275 | dr->cookies, &ncookies, | |
1276 | (LDC_MAP_SHADOW | | |
1277 | LDC_MAP_DIRECT | | |
1278 | LDC_MAP_RW)); | |
1279 | if (IS_ERR(dring)) { | |
1280 | err = PTR_ERR(dring); | |
1281 | goto err_out; | |
1282 | } | |
1283 | ||
1284 | dr->base = dring; | |
1285 | dr->entry_size = (sizeof(struct vio_net_desc) + | |
1286 | (sizeof(struct ldc_trans_cookie) * 2)); | |
1287 | dr->num_entries = VNET_TX_RING_SIZE; | |
1288 | dr->prod = dr->cons = 0; | |
d1015645 | 1289 | port->start_cons = true; /* need an initial trigger */ |
4c521e42 DM |
1290 | dr->pending = VNET_TX_RING_SIZE; |
1291 | dr->ncookies = ncookies; | |
1292 | ||
8e845f4c DS |
1293 | for (i = 0; i < VNET_TX_RING_SIZE; ++i) { |
1294 | struct vio_net_desc *d; | |
1295 | ||
1296 | d = vio_dring_entry(dr, i); | |
1297 | d->hdr.state = VIO_DESC_FREE; | |
1298 | } | |
4c521e42 DM |
1299 | return 0; |
1300 | ||
1301 | err_out: | |
1302 | vnet_port_free_tx_bufs(port); | |
1303 | ||
1304 | return err; | |
1305 | } | |
1306 | ||
9184a046 DM |
1307 | static LIST_HEAD(vnet_list); |
1308 | static DEFINE_MUTEX(vnet_list_mutex); | |
1309 | ||
8fd17f2e DM |
1310 | static const struct net_device_ops vnet_ops = { |
1311 | .ndo_open = vnet_open, | |
1312 | .ndo_stop = vnet_close, | |
afc4b13d | 1313 | .ndo_set_rx_mode = vnet_set_rx_mode, |
8fd17f2e | 1314 | .ndo_set_mac_address = vnet_set_mac_addr, |
240c102d | 1315 | .ndo_validate_addr = eth_validate_addr, |
8fd17f2e DM |
1316 | .ndo_tx_timeout = vnet_tx_timeout, |
1317 | .ndo_change_mtu = vnet_change_mtu, | |
1318 | .ndo_start_xmit = vnet_start_xmit, | |
1319 | }; | |
1320 | ||
f73d12bd | 1321 | static struct vnet *vnet_new(const u64 *local_mac) |
9184a046 DM |
1322 | { |
1323 | struct net_device *dev; | |
1324 | struct vnet *vp; | |
1325 | int err, i; | |
1326 | ||
1327 | dev = alloc_etherdev(sizeof(*vp)); | |
41de8d4c | 1328 | if (!dev) |
9184a046 | 1329 | return ERR_PTR(-ENOMEM); |
8e845f4c DS |
1330 | dev->needed_headroom = VNET_PACKET_SKIP + 8; |
1331 | dev->needed_tailroom = 8; | |
9184a046 DM |
1332 | |
1333 | for (i = 0; i < ETH_ALEN; i++) | |
1334 | dev->dev_addr[i] = (*local_mac >> (5 - i) * 8) & 0xff; | |
1335 | ||
9184a046 DM |
1336 | vp = netdev_priv(dev); |
1337 | ||
1338 | spin_lock_init(&vp->lock); | |
1d311ad2 | 1339 | tasklet_init(&vp->vnet_tx_wakeup, maybe_tx_wakeup, (unsigned long)vp); |
9184a046 DM |
1340 | vp->dev = dev; |
1341 | ||
1342 | INIT_LIST_HEAD(&vp->port_list); | |
1343 | for (i = 0; i < VNET_PORT_HASH_SIZE; i++) | |
1344 | INIT_HLIST_HEAD(&vp->port_hash[i]); | |
1345 | INIT_LIST_HEAD(&vp->list); | |
1346 | vp->local_mac = *local_mac; | |
1347 | ||
8fd17f2e | 1348 | dev->netdev_ops = &vnet_ops; |
9184a046 DM |
1349 | dev->ethtool_ops = &vnet_ethtool_ops; |
1350 | dev->watchdog_timeo = VNET_TX_TIMEOUT; | |
9184a046 DM |
1351 | |
1352 | err = register_netdev(dev); | |
1353 | if (err) { | |
4d5870ec | 1354 | pr_err("Cannot register net device, aborting\n"); |
9184a046 DM |
1355 | goto err_out_free_dev; |
1356 | } | |
1357 | ||
4d5870ec | 1358 | netdev_info(dev, "Sun LDOM vnet %pM\n", dev->dev_addr); |
9184a046 DM |
1359 | |
1360 | list_add(&vp->list, &vnet_list); | |
1361 | ||
1362 | return vp; | |
1363 | ||
1364 | err_out_free_dev: | |
1365 | free_netdev(dev); | |
1366 | ||
1367 | return ERR_PTR(err); | |
1368 | } | |
1369 | ||
f73d12bd | 1370 | static struct vnet *vnet_find_or_create(const u64 *local_mac) |
9184a046 DM |
1371 | { |
1372 | struct vnet *iter, *vp; | |
1373 | ||
1374 | mutex_lock(&vnet_list_mutex); | |
1375 | vp = NULL; | |
1376 | list_for_each_entry(iter, &vnet_list, list) { | |
1377 | if (iter->local_mac == *local_mac) { | |
1378 | vp = iter; | |
1379 | break; | |
1380 | } | |
1381 | } | |
1382 | if (!vp) | |
1383 | vp = vnet_new(local_mac); | |
1384 | mutex_unlock(&vnet_list_mutex); | |
1385 | ||
1386 | return vp; | |
1387 | } | |
1388 | ||
a4b70a07 SV |
1389 | static void vnet_cleanup(void) |
1390 | { | |
1391 | struct vnet *vp; | |
1392 | struct net_device *dev; | |
1393 | ||
1394 | mutex_lock(&vnet_list_mutex); | |
1395 | while (!list_empty(&vnet_list)) { | |
1396 | vp = list_first_entry(&vnet_list, struct vnet, list); | |
1397 | list_del(&vp->list); | |
1398 | dev = vp->dev; | |
1d311ad2 | 1399 | tasklet_kill(&vp->vnet_tx_wakeup); |
a4b70a07 SV |
1400 | /* vio_unregister_driver() should have cleaned up port_list */ |
1401 | BUG_ON(!list_empty(&vp->port_list)); | |
1402 | unregister_netdev(dev); | |
1403 | free_netdev(dev); | |
1404 | } | |
1405 | mutex_unlock(&vnet_list_mutex); | |
1406 | } | |
1407 | ||
9184a046 DM |
1408 | static const char *local_mac_prop = "local-mac-address"; |
1409 | ||
f73d12bd | 1410 | static struct vnet *vnet_find_parent(struct mdesc_handle *hp, |
9184a046 DM |
1411 | u64 port_node) |
1412 | { | |
1413 | const u64 *local_mac = NULL; | |
1414 | u64 a; | |
1415 | ||
1416 | mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) { | |
1417 | u64 target = mdesc_arc_target(hp, a); | |
1418 | const char *name; | |
1419 | ||
1420 | name = mdesc_get_property(hp, target, "name", NULL); | |
1421 | if (!name || strcmp(name, "network")) | |
1422 | continue; | |
1423 | ||
1424 | local_mac = mdesc_get_property(hp, target, | |
1425 | local_mac_prop, NULL); | |
1426 | if (local_mac) | |
1427 | break; | |
1428 | } | |
1429 | if (!local_mac) | |
1430 | return ERR_PTR(-ENODEV); | |
1431 | ||
1432 | return vnet_find_or_create(local_mac); | |
1433 | } | |
1434 | ||
4c521e42 DM |
1435 | static struct ldc_channel_config vnet_ldc_cfg = { |
1436 | .event = vnet_event, | |
1437 | .mtu = 64, | |
1438 | .mode = LDC_MODE_UNRELIABLE, | |
1439 | }; | |
1440 | ||
1441 | static struct vio_driver_ops vnet_vio_ops = { | |
1442 | .send_attr = vnet_send_attr, | |
1443 | .handle_attr = vnet_handle_attr, | |
1444 | .handshake_complete = vnet_handshake_complete, | |
1445 | }; | |
1446 | ||
f73d12bd | 1447 | static void print_version(void) |
9184a046 | 1448 | { |
4d5870ec | 1449 | printk_once(KERN_INFO "%s", version); |
9184a046 DM |
1450 | } |
1451 | ||
4c521e42 DM |
1452 | const char *remote_macaddr_prop = "remote-mac-address"; |
1453 | ||
1dd06ae8 | 1454 | static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
4c521e42 | 1455 | { |
43fdf274 | 1456 | struct mdesc_handle *hp; |
4c521e42 DM |
1457 | struct vnet_port *port; |
1458 | unsigned long flags; | |
1459 | struct vnet *vp; | |
1460 | const u64 *rmac; | |
1461 | int len, i, err, switch_port; | |
1462 | ||
9184a046 | 1463 | print_version(); |
4c521e42 | 1464 | |
43fdf274 DM |
1465 | hp = mdesc_grab(); |
1466 | ||
9184a046 DM |
1467 | vp = vnet_find_parent(hp, vdev->mp); |
1468 | if (IS_ERR(vp)) { | |
4d5870ec | 1469 | pr_err("Cannot find port parent vnet\n"); |
9184a046 DM |
1470 | err = PTR_ERR(vp); |
1471 | goto err_out_put_mdesc; | |
1472 | } | |
1473 | ||
43fdf274 DM |
1474 | rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len); |
1475 | err = -ENODEV; | |
4c521e42 | 1476 | if (!rmac) { |
4d5870ec | 1477 | pr_err("Port lacks %s property\n", remote_macaddr_prop); |
43fdf274 | 1478 | goto err_out_put_mdesc; |
4c521e42 DM |
1479 | } |
1480 | ||
1481 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
43fdf274 | 1482 | err = -ENOMEM; |
e404decb | 1483 | if (!port) |
43fdf274 | 1484 | goto err_out_put_mdesc; |
4c521e42 DM |
1485 | |
1486 | for (i = 0; i < ETH_ALEN; i++) | |
1487 | port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff; | |
1488 | ||
1489 | port->vp = vp; | |
1490 | ||
43fdf274 | 1491 | err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK, |
4c521e42 DM |
1492 | vnet_versions, ARRAY_SIZE(vnet_versions), |
1493 | &vnet_vio_ops, vp->dev->name); | |
1494 | if (err) | |
1495 | goto err_out_free_port; | |
1496 | ||
1497 | err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port); | |
1498 | if (err) | |
1499 | goto err_out_free_port; | |
1500 | ||
1501 | err = vnet_port_alloc_tx_bufs(port); | |
1502 | if (err) | |
1503 | goto err_out_free_ldc; | |
1504 | ||
1505 | INIT_HLIST_NODE(&port->hash); | |
1506 | INIT_LIST_HEAD(&port->list); | |
1507 | ||
1508 | switch_port = 0; | |
43fdf274 | 1509 | if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL) != NULL) |
4c521e42 | 1510 | switch_port = 1; |
028ebff2 | 1511 | port->switch_port = switch_port; |
4c521e42 DM |
1512 | |
1513 | spin_lock_irqsave(&vp->lock, flags); | |
1514 | if (switch_port) | |
1515 | list_add(&port->list, &vp->port_list); | |
1516 | else | |
1517 | list_add_tail(&port->list, &vp->port_list); | |
1518 | hlist_add_head(&port->hash, &vp->port_hash[vnet_hashfn(port->raddr)]); | |
1519 | spin_unlock_irqrestore(&vp->lock, flags); | |
1520 | ||
1521 | dev_set_drvdata(&vdev->dev, port); | |
1522 | ||
4d5870ec JP |
1523 | pr_info("%s: PORT ( remote-mac %pM%s )\n", |
1524 | vp->dev->name, port->raddr, switch_port ? " switch-port" : ""); | |
4c521e42 | 1525 | |
8e845f4c DS |
1526 | setup_timer(&port->clean_timer, vnet_clean_timer_expire, |
1527 | (unsigned long)port); | |
1528 | ||
4c521e42 DM |
1529 | vio_port_up(&port->vio); |
1530 | ||
43fdf274 DM |
1531 | mdesc_release(hp); |
1532 | ||
4c521e42 DM |
1533 | return 0; |
1534 | ||
1535 | err_out_free_ldc: | |
1536 | vio_ldc_free(&port->vio); | |
1537 | ||
1538 | err_out_free_port: | |
1539 | kfree(port); | |
1540 | ||
43fdf274 DM |
1541 | err_out_put_mdesc: |
1542 | mdesc_release(hp); | |
4c521e42 DM |
1543 | return err; |
1544 | } | |
1545 | ||
1546 | static int vnet_port_remove(struct vio_dev *vdev) | |
1547 | { | |
1548 | struct vnet_port *port = dev_get_drvdata(&vdev->dev); | |
1549 | ||
1550 | if (port) { | |
1551 | struct vnet *vp = port->vp; | |
1552 | unsigned long flags; | |
1553 | ||
1554 | del_timer_sync(&port->vio.timer); | |
8e845f4c | 1555 | del_timer_sync(&port->clean_timer); |
4c521e42 DM |
1556 | |
1557 | spin_lock_irqsave(&vp->lock, flags); | |
1558 | list_del(&port->list); | |
1559 | hlist_del(&port->hash); | |
1560 | spin_unlock_irqrestore(&vp->lock, flags); | |
1561 | ||
1562 | vnet_port_free_tx_bufs(port); | |
1563 | vio_ldc_free(&port->vio); | |
1564 | ||
1565 | dev_set_drvdata(&vdev->dev, NULL); | |
1566 | ||
1567 | kfree(port); | |
aabb9875 | 1568 | |
4c521e42 DM |
1569 | } |
1570 | return 0; | |
1571 | } | |
1572 | ||
3d452e55 | 1573 | static const struct vio_device_id vnet_port_match[] = { |
4c521e42 DM |
1574 | { |
1575 | .type = "vnet-port", | |
1576 | }, | |
1577 | {}, | |
1578 | }; | |
da68e081 | 1579 | MODULE_DEVICE_TABLE(vio, vnet_port_match); |
4c521e42 DM |
1580 | |
1581 | static struct vio_driver vnet_port_driver = { | |
1582 | .id_table = vnet_port_match, | |
1583 | .probe = vnet_port_probe, | |
1584 | .remove = vnet_port_remove, | |
cb52d897 | 1585 | .name = "vnet_port", |
4c521e42 DM |
1586 | }; |
1587 | ||
4c521e42 DM |
1588 | static int __init vnet_init(void) |
1589 | { | |
9184a046 | 1590 | return vio_register_driver(&vnet_port_driver); |
4c521e42 DM |
1591 | } |
1592 | ||
1593 | static void __exit vnet_exit(void) | |
1594 | { | |
1595 | vio_unregister_driver(&vnet_port_driver); | |
a4b70a07 | 1596 | vnet_cleanup(); |
4c521e42 DM |
1597 | } |
1598 | ||
1599 | module_init(vnet_init); | |
1600 | module_exit(vnet_exit); |