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31762eaa AY |
1 | /* sunvnet.c: Sun LDOM Virtual Network Driver. |
2 | * | |
3 | * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> | |
67d0719f | 4 | * Copyright (C) 2016 Oracle. All rights reserved. |
31762eaa AY |
5 | */ |
6 | ||
7 | #include <linux/module.h> | |
8 | #include <linux/kernel.h> | |
9 | #include <linux/types.h> | |
10 | #include <linux/slab.h> | |
11 | #include <linux/delay.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/netdevice.h> | |
14 | #include <linux/ethtool.h> | |
15 | #include <linux/etherdevice.h> | |
16 | #include <linux/mutex.h> | |
17 | #include <linux/highmem.h> | |
18 | #include <linux/if_vlan.h> | |
19 | #define CREATE_TRACE_POINTS | |
20 | #include <trace/events/sunvnet.h> | |
21 | ||
22 | #if IS_ENABLED(CONFIG_IPV6) | |
23 | #include <linux/icmpv6.h> | |
24 | #endif | |
25 | ||
26 | #include <net/ip.h> | |
27 | #include <net/icmp.h> | |
28 | #include <net/route.h> | |
29 | ||
30 | #include <asm/vio.h> | |
31 | #include <asm/ldc.h> | |
32 | ||
33 | #include "sunvnet_common.h" | |
34 | ||
35 | /* Heuristic for the number of times to exponentially backoff and | |
36 | * retry sending an LDC trigger when EAGAIN is encountered | |
37 | */ | |
38 | #define VNET_MAX_RETRIES 10 | |
39 | ||
40 | static int __vnet_tx_trigger(struct vnet_port *port, u32 start); | |
41 | static void vnet_port_reset(struct vnet_port *port); | |
42 | ||
43 | static inline u32 vnet_tx_dring_avail(struct vio_dring_state *dr) | |
44 | { | |
45 | return vio_dring_avail(dr, VNET_TX_RING_SIZE); | |
46 | } | |
47 | ||
48 | static int vnet_handle_unknown(struct vnet_port *port, void *arg) | |
49 | { | |
50 | struct vio_msg_tag *pkt = arg; | |
51 | ||
52 | pr_err("Received unknown msg [%02x:%02x:%04x:%08x]\n", | |
53 | pkt->type, pkt->stype, pkt->stype_env, pkt->sid); | |
54 | pr_err("Resetting connection\n"); | |
55 | ||
56 | ldc_disconnect(port->vio.lp); | |
57 | ||
58 | return -ECONNRESET; | |
59 | } | |
60 | ||
61 | static int vnet_port_alloc_tx_ring(struct vnet_port *port); | |
62 | ||
63 | int sunvnet_send_attr_common(struct vio_driver_state *vio) | |
64 | { | |
65 | struct vnet_port *port = to_vnet_port(vio); | |
67d0719f | 66 | struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port); |
31762eaa AY |
67 | struct vio_net_attr_info pkt; |
68 | int framelen = ETH_FRAME_LEN; | |
69 | int i, err; | |
70 | ||
71 | err = vnet_port_alloc_tx_ring(to_vnet_port(vio)); | |
72 | if (err) | |
73 | return err; | |
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); | |
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; | |
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); | |
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.cflags = 0; | |
105 | if (vio_version_after_eq(vio, 1, 7) && port->tso) { | |
106 | pkt.cflags |= VNET_LSO_IPV4_CAPAB; | |
107 | if (!port->tsolen) | |
108 | port->tsolen = VNET_MAXTSO; | |
109 | pkt.ipv4_lso_maxlen = port->tsolen; | |
110 | } | |
111 | ||
112 | pkt.plnk_updt = PHYSLINK_UPDATE_NONE; | |
113 | ||
114 | viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] " | |
115 | "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] " | |
116 | "cflags[0x%04x] lso_max[%u]\n", | |
117 | pkt.xfer_mode, pkt.addr_type, | |
118 | (unsigned long long)pkt.addr, | |
119 | pkt.ack_freq, pkt.plnk_updt, pkt.options, | |
120 | (unsigned long long)pkt.mtu, pkt.cflags, pkt.ipv4_lso_maxlen); | |
121 | ||
31762eaa AY |
122 | return vio_ldc_send(vio, &pkt, sizeof(pkt)); |
123 | } | |
124 | EXPORT_SYMBOL_GPL(sunvnet_send_attr_common); | |
125 | ||
126 | static int handle_attr_info(struct vio_driver_state *vio, | |
127 | struct vio_net_attr_info *pkt) | |
128 | { | |
129 | struct vnet_port *port = to_vnet_port(vio); | |
130 | u64 localmtu; | |
131 | u8 xfer_mode; | |
132 | ||
133 | viodbg(HS, "GOT NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] " | |
134 | "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] " | |
135 | " (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n", | |
136 | pkt->xfer_mode, pkt->addr_type, | |
137 | (unsigned long long)pkt->addr, | |
138 | pkt->ack_freq, pkt->plnk_updt, pkt->options, | |
139 | (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags, | |
140 | pkt->ipv4_lso_maxlen); | |
141 | ||
142 | pkt->tag.sid = vio_send_sid(vio); | |
143 | ||
144 | xfer_mode = pkt->xfer_mode; | |
145 | /* for version < 1.2, VIO_DRING_MODE = 0x3 and no bitmask */ | |
146 | if (vio_version_before(vio, 1, 2) && xfer_mode == VIO_DRING_MODE) | |
147 | xfer_mode = VIO_NEW_DRING_MODE; | |
148 | ||
149 | /* MTU negotiation: | |
150 | * < v1.3 - ETH_FRAME_LEN exactly | |
151 | * > v1.3 - MIN(pkt.mtu, VNET_MAXPACKET, port->rmtu) and change | |
152 | * pkt->mtu for ACK | |
153 | * = v1.3 - ETH_FRAME_LEN + VLAN_HLEN exactly | |
154 | */ | |
155 | if (vio_version_before(vio, 1, 3)) { | |
156 | localmtu = ETH_FRAME_LEN; | |
157 | } else if (vio_version_after(vio, 1, 3)) { | |
158 | localmtu = port->rmtu ? port->rmtu : VNET_MAXPACKET; | |
159 | localmtu = min(pkt->mtu, localmtu); | |
160 | pkt->mtu = localmtu; | |
161 | } else { /* v1.3 */ | |
162 | localmtu = ETH_FRAME_LEN + VLAN_HLEN; | |
163 | } | |
164 | port->rmtu = localmtu; | |
165 | ||
166 | /* LSO negotiation */ | |
167 | if (vio_version_after_eq(vio, 1, 7)) | |
168 | port->tso &= !!(pkt->cflags & VNET_LSO_IPV4_CAPAB); | |
169 | else | |
170 | port->tso = false; | |
171 | if (port->tso) { | |
172 | if (!port->tsolen) | |
173 | port->tsolen = VNET_MAXTSO; | |
174 | port->tsolen = min(port->tsolen, pkt->ipv4_lso_maxlen); | |
175 | if (port->tsolen < VNET_MINTSO) { | |
176 | port->tso = false; | |
177 | port->tsolen = 0; | |
178 | pkt->cflags &= ~VNET_LSO_IPV4_CAPAB; | |
179 | } | |
180 | pkt->ipv4_lso_maxlen = port->tsolen; | |
181 | } else { | |
182 | pkt->cflags &= ~VNET_LSO_IPV4_CAPAB; | |
183 | pkt->ipv4_lso_maxlen = 0; | |
184 | } | |
185 | ||
186 | /* for version >= 1.6, ACK packet mode we support */ | |
187 | if (vio_version_after_eq(vio, 1, 6)) { | |
188 | pkt->xfer_mode = VIO_NEW_DRING_MODE; | |
189 | pkt->options = VIO_TX_DRING; | |
190 | } | |
191 | ||
192 | if (!(xfer_mode | VIO_NEW_DRING_MODE) || | |
193 | pkt->addr_type != VNET_ADDR_ETHERMAC || | |
194 | pkt->mtu != localmtu) { | |
195 | viodbg(HS, "SEND NET ATTR NACK\n"); | |
196 | ||
197 | pkt->tag.stype = VIO_SUBTYPE_NACK; | |
198 | ||
dc153f85 | 199 | (void)vio_ldc_send(vio, pkt, sizeof(*pkt)); |
31762eaa AY |
200 | |
201 | return -ECONNRESET; | |
31762eaa AY |
202 | } |
203 | ||
dc153f85 AY |
204 | viodbg(HS, "SEND NET ATTR ACK xmode[0x%x] atype[0x%x] " |
205 | "addr[%llx] ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] " | |
206 | "mtu[%llu] (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n", | |
207 | pkt->xfer_mode, pkt->addr_type, | |
208 | (unsigned long long)pkt->addr, | |
209 | pkt->ack_freq, pkt->plnk_updt, pkt->options, | |
210 | (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags, | |
211 | pkt->ipv4_lso_maxlen); | |
212 | ||
213 | pkt->tag.stype = VIO_SUBTYPE_ACK; | |
214 | ||
215 | return vio_ldc_send(vio, pkt, sizeof(*pkt)); | |
31762eaa AY |
216 | } |
217 | ||
218 | static int handle_attr_ack(struct vio_driver_state *vio, | |
219 | struct vio_net_attr_info *pkt) | |
220 | { | |
221 | viodbg(HS, "GOT NET ATTR ACK\n"); | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
226 | static int handle_attr_nack(struct vio_driver_state *vio, | |
227 | struct vio_net_attr_info *pkt) | |
228 | { | |
229 | viodbg(HS, "GOT NET ATTR NACK\n"); | |
230 | ||
231 | return -ECONNRESET; | |
232 | } | |
233 | ||
234 | int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg) | |
235 | { | |
236 | struct vio_net_attr_info *pkt = arg; | |
237 | ||
238 | switch (pkt->tag.stype) { | |
239 | case VIO_SUBTYPE_INFO: | |
240 | return handle_attr_info(vio, pkt); | |
241 | ||
242 | case VIO_SUBTYPE_ACK: | |
243 | return handle_attr_ack(vio, pkt); | |
244 | ||
245 | case VIO_SUBTYPE_NACK: | |
246 | return handle_attr_nack(vio, pkt); | |
247 | ||
248 | default: | |
249 | return -ECONNRESET; | |
250 | } | |
251 | } | |
252 | EXPORT_SYMBOL_GPL(sunvnet_handle_attr_common); | |
253 | ||
254 | void sunvnet_handshake_complete_common(struct vio_driver_state *vio) | |
255 | { | |
256 | struct vio_dring_state *dr; | |
257 | ||
258 | dr = &vio->drings[VIO_DRIVER_RX_RING]; | |
dc153f85 AY |
259 | dr->rcv_nxt = 1; |
260 | dr->snd_nxt = 1; | |
31762eaa AY |
261 | |
262 | dr = &vio->drings[VIO_DRIVER_TX_RING]; | |
dc153f85 AY |
263 | dr->rcv_nxt = 1; |
264 | dr->snd_nxt = 1; | |
31762eaa AY |
265 | } |
266 | EXPORT_SYMBOL_GPL(sunvnet_handshake_complete_common); | |
267 | ||
268 | /* The hypervisor interface that implements copying to/from imported | |
269 | * memory from another domain requires that copies are done to 8-byte | |
270 | * aligned buffers, and that the lengths of such copies are also 8-byte | |
271 | * multiples. | |
272 | * | |
273 | * So we align skb->data to an 8-byte multiple and pad-out the data | |
274 | * area so we can round the copy length up to the next multiple of | |
275 | * 8 for the copy. | |
276 | * | |
277 | * The transmitter puts the actual start of the packet 6 bytes into | |
278 | * the buffer it sends over, so that the IP headers after the ethernet | |
279 | * header are aligned properly. These 6 bytes are not in the descriptor | |
280 | * length, they are simply implied. This offset is represented using | |
281 | * the VNET_PACKET_SKIP macro. | |
282 | */ | |
283 | static struct sk_buff *alloc_and_align_skb(struct net_device *dev, | |
284 | unsigned int len) | |
285 | { | |
dc153f85 | 286 | struct sk_buff *skb; |
31762eaa AY |
287 | unsigned long addr, off; |
288 | ||
dc153f85 | 289 | skb = netdev_alloc_skb(dev, len + VNET_PACKET_SKIP + 8 + 8); |
31762eaa AY |
290 | if (unlikely(!skb)) |
291 | return NULL; | |
292 | ||
dc153f85 | 293 | addr = (unsigned long)skb->data; |
31762eaa AY |
294 | off = ((addr + 7UL) & ~7UL) - addr; |
295 | if (off) | |
296 | skb_reserve(skb, off); | |
297 | ||
298 | return skb; | |
299 | } | |
300 | ||
301 | static inline void vnet_fullcsum(struct sk_buff *skb) | |
302 | { | |
303 | struct iphdr *iph = ip_hdr(skb); | |
304 | int offset = skb_transport_offset(skb); | |
305 | ||
306 | if (skb->protocol != htons(ETH_P_IP)) | |
307 | return; | |
308 | if (iph->protocol != IPPROTO_TCP && | |
309 | iph->protocol != IPPROTO_UDP) | |
310 | return; | |
311 | skb->ip_summed = CHECKSUM_NONE; | |
312 | skb->csum_level = 1; | |
313 | skb->csum = 0; | |
314 | if (iph->protocol == IPPROTO_TCP) { | |
315 | struct tcphdr *ptcp = tcp_hdr(skb); | |
316 | ||
317 | ptcp->check = 0; | |
318 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
319 | ptcp->check = csum_tcpudp_magic(iph->saddr, iph->daddr, | |
320 | skb->len - offset, IPPROTO_TCP, | |
321 | skb->csum); | |
322 | } else if (iph->protocol == IPPROTO_UDP) { | |
323 | struct udphdr *pudp = udp_hdr(skb); | |
324 | ||
325 | pudp->check = 0; | |
326 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
327 | pudp->check = csum_tcpudp_magic(iph->saddr, iph->daddr, | |
328 | skb->len - offset, IPPROTO_UDP, | |
329 | skb->csum); | |
330 | } | |
331 | } | |
332 | ||
333 | static int vnet_rx_one(struct vnet_port *port, struct vio_net_desc *desc) | |
334 | { | |
67d0719f | 335 | struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port); |
31762eaa AY |
336 | unsigned int len = desc->size; |
337 | unsigned int copy_len; | |
338 | struct sk_buff *skb; | |
339 | int maxlen; | |
340 | int err; | |
341 | ||
342 | err = -EMSGSIZE; | |
343 | if (port->tso && port->tsolen > port->rmtu) | |
344 | maxlen = port->tsolen; | |
345 | else | |
346 | maxlen = port->rmtu; | |
347 | if (unlikely(len < ETH_ZLEN || len > maxlen)) { | |
348 | dev->stats.rx_length_errors++; | |
349 | goto out_dropped; | |
350 | } | |
351 | ||
352 | skb = alloc_and_align_skb(dev, len); | |
353 | err = -ENOMEM; | |
354 | if (unlikely(!skb)) { | |
355 | dev->stats.rx_missed_errors++; | |
356 | goto out_dropped; | |
357 | } | |
358 | ||
359 | copy_len = (len + VNET_PACKET_SKIP + 7U) & ~7U; | |
360 | skb_put(skb, copy_len); | |
361 | err = ldc_copy(port->vio.lp, LDC_COPY_IN, | |
362 | skb->data, copy_len, 0, | |
363 | desc->cookies, desc->ncookies); | |
364 | if (unlikely(err < 0)) { | |
365 | dev->stats.rx_frame_errors++; | |
366 | goto out_free_skb; | |
367 | } | |
368 | ||
369 | skb_pull(skb, VNET_PACKET_SKIP); | |
370 | skb_trim(skb, len); | |
371 | skb->protocol = eth_type_trans(skb, dev); | |
372 | ||
373 | if (vio_version_after_eq(&port->vio, 1, 8)) { | |
374 | struct vio_net_dext *dext = vio_net_ext(desc); | |
375 | ||
376 | skb_reset_network_header(skb); | |
377 | ||
378 | if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM) { | |
379 | if (skb->protocol == ETH_P_IP) { | |
380 | struct iphdr *iph = ip_hdr(skb); | |
381 | ||
382 | iph->check = 0; | |
383 | ip_send_check(iph); | |
384 | } | |
385 | } | |
386 | if ((dext->flags & VNET_PKT_HCK_FULLCKSUM) && | |
387 | skb->ip_summed == CHECKSUM_NONE) { | |
388 | if (skb->protocol == htons(ETH_P_IP)) { | |
389 | struct iphdr *iph = ip_hdr(skb); | |
390 | int ihl = iph->ihl * 4; | |
391 | ||
392 | skb_reset_transport_header(skb); | |
393 | skb_set_transport_header(skb, ihl); | |
394 | vnet_fullcsum(skb); | |
395 | } | |
396 | } | |
397 | if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM_OK) { | |
398 | skb->ip_summed = CHECKSUM_PARTIAL; | |
399 | skb->csum_level = 0; | |
400 | if (dext->flags & VNET_PKT_HCK_FULLCKSUM_OK) | |
401 | skb->csum_level = 1; | |
402 | } | |
403 | } | |
404 | ||
405 | skb->ip_summed = port->switch_port ? CHECKSUM_NONE : CHECKSUM_PARTIAL; | |
406 | ||
407 | dev->stats.rx_packets++; | |
408 | dev->stats.rx_bytes += len; | |
409 | napi_gro_receive(&port->napi, skb); | |
410 | return 0; | |
411 | ||
412 | out_free_skb: | |
413 | kfree_skb(skb); | |
414 | ||
415 | out_dropped: | |
416 | dev->stats.rx_dropped++; | |
417 | return err; | |
418 | } | |
419 | ||
420 | static int vnet_send_ack(struct vnet_port *port, struct vio_dring_state *dr, | |
421 | u32 start, u32 end, u8 vio_dring_state) | |
422 | { | |
423 | struct vio_dring_data hdr = { | |
424 | .tag = { | |
425 | .type = VIO_TYPE_DATA, | |
426 | .stype = VIO_SUBTYPE_ACK, | |
427 | .stype_env = VIO_DRING_DATA, | |
428 | .sid = vio_send_sid(&port->vio), | |
429 | }, | |
430 | .dring_ident = dr->ident, | |
431 | .start_idx = start, | |
432 | .end_idx = end, | |
433 | .state = vio_dring_state, | |
434 | }; | |
435 | int err, delay; | |
436 | int retries = 0; | |
437 | ||
438 | hdr.seq = dr->snd_nxt; | |
439 | delay = 1; | |
440 | do { | |
441 | err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr)); | |
442 | if (err > 0) { | |
443 | dr->snd_nxt++; | |
444 | break; | |
445 | } | |
446 | udelay(delay); | |
447 | if ((delay <<= 1) > 128) | |
448 | delay = 128; | |
449 | if (retries++ > VNET_MAX_RETRIES) { | |
450 | pr_info("ECONNRESET %x:%x:%x:%x:%x:%x\n", | |
451 | port->raddr[0], port->raddr[1], | |
452 | port->raddr[2], port->raddr[3], | |
453 | port->raddr[4], port->raddr[5]); | |
454 | break; | |
455 | } | |
456 | } while (err == -EAGAIN); | |
457 | ||
458 | if (err <= 0 && vio_dring_state == VIO_DRING_STOPPED) { | |
459 | port->stop_rx_idx = end; | |
460 | port->stop_rx = true; | |
461 | } else { | |
462 | port->stop_rx_idx = 0; | |
463 | port->stop_rx = false; | |
464 | } | |
465 | ||
466 | return err; | |
467 | } | |
468 | ||
469 | static struct vio_net_desc *get_rx_desc(struct vnet_port *port, | |
470 | struct vio_dring_state *dr, | |
471 | u32 index) | |
472 | { | |
473 | struct vio_net_desc *desc = port->vio.desc_buf; | |
474 | int err; | |
475 | ||
476 | err = ldc_get_dring_entry(port->vio.lp, desc, dr->entry_size, | |
477 | (index * dr->entry_size), | |
478 | dr->cookies, dr->ncookies); | |
479 | if (err < 0) | |
480 | return ERR_PTR(err); | |
481 | ||
482 | return desc; | |
483 | } | |
484 | ||
485 | static int put_rx_desc(struct vnet_port *port, | |
486 | struct vio_dring_state *dr, | |
487 | struct vio_net_desc *desc, | |
488 | u32 index) | |
489 | { | |
490 | int err; | |
491 | ||
492 | err = ldc_put_dring_entry(port->vio.lp, desc, dr->entry_size, | |
493 | (index * dr->entry_size), | |
494 | dr->cookies, dr->ncookies); | |
495 | if (err < 0) | |
496 | return err; | |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
501 | static int vnet_walk_rx_one(struct vnet_port *port, | |
502 | struct vio_dring_state *dr, | |
503 | u32 index, int *needs_ack) | |
504 | { | |
505 | struct vio_net_desc *desc = get_rx_desc(port, dr, index); | |
506 | struct vio_driver_state *vio = &port->vio; | |
507 | int err; | |
508 | ||
dc153f85 | 509 | BUG_ON(!desc); |
31762eaa AY |
510 | if (IS_ERR(desc)) |
511 | return PTR_ERR(desc); | |
512 | ||
513 | if (desc->hdr.state != VIO_DESC_READY) | |
514 | return 1; | |
515 | ||
516 | dma_rmb(); | |
517 | ||
518 | viodbg(DATA, "vio_walk_rx_one desc[%02x:%02x:%08x:%08x:%llx:%llx]\n", | |
519 | desc->hdr.state, desc->hdr.ack, | |
520 | desc->size, desc->ncookies, | |
521 | desc->cookies[0].cookie_addr, | |
522 | desc->cookies[0].cookie_size); | |
523 | ||
524 | err = vnet_rx_one(port, desc); | |
525 | if (err == -ECONNRESET) | |
526 | return err; | |
527 | trace_vnet_rx_one(port->vio._local_sid, port->vio._peer_sid, | |
528 | index, desc->hdr.ack); | |
529 | desc->hdr.state = VIO_DESC_DONE; | |
530 | err = put_rx_desc(port, dr, desc, index); | |
531 | if (err < 0) | |
532 | return err; | |
533 | *needs_ack = desc->hdr.ack; | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static int vnet_walk_rx(struct vnet_port *port, struct vio_dring_state *dr, | |
538 | u32 start, u32 end, int *npkts, int budget) | |
539 | { | |
540 | struct vio_driver_state *vio = &port->vio; | |
541 | int ack_start = -1, ack_end = -1; | |
542 | bool send_ack = true; | |
543 | ||
dc153f85 AY |
544 | end = (end == (u32)-1) ? vio_dring_prev(dr, start) |
545 | : vio_dring_next(dr, end); | |
31762eaa AY |
546 | |
547 | viodbg(DATA, "vnet_walk_rx start[%08x] end[%08x]\n", start, end); | |
548 | ||
549 | while (start != end) { | |
550 | int ack = 0, err = vnet_walk_rx_one(port, dr, start, &ack); | |
dc153f85 | 551 | |
31762eaa AY |
552 | if (err == -ECONNRESET) |
553 | return err; | |
554 | if (err != 0) | |
555 | break; | |
556 | (*npkts)++; | |
557 | if (ack_start == -1) | |
558 | ack_start = start; | |
559 | ack_end = start; | |
560 | start = vio_dring_next(dr, start); | |
561 | if (ack && start != end) { | |
562 | err = vnet_send_ack(port, dr, ack_start, ack_end, | |
563 | VIO_DRING_ACTIVE); | |
564 | if (err == -ECONNRESET) | |
565 | return err; | |
566 | ack_start = -1; | |
567 | } | |
568 | if ((*npkts) >= budget) { | |
569 | send_ack = false; | |
570 | break; | |
571 | } | |
572 | } | |
dc153f85 AY |
573 | if (unlikely(ack_start == -1)) { |
574 | ack_end = vio_dring_prev(dr, start); | |
575 | ack_start = ack_end; | |
576 | } | |
31762eaa AY |
577 | if (send_ack) { |
578 | port->napi_resume = false; | |
579 | trace_vnet_tx_send_stopped_ack(port->vio._local_sid, | |
580 | port->vio._peer_sid, | |
581 | ack_end, *npkts); | |
582 | return vnet_send_ack(port, dr, ack_start, ack_end, | |
583 | VIO_DRING_STOPPED); | |
584 | } else { | |
585 | trace_vnet_tx_defer_stopped_ack(port->vio._local_sid, | |
586 | port->vio._peer_sid, | |
587 | ack_end, *npkts); | |
588 | port->napi_resume = true; | |
589 | port->napi_stop_idx = ack_end; | |
590 | return 1; | |
591 | } | |
592 | } | |
593 | ||
594 | static int vnet_rx(struct vnet_port *port, void *msgbuf, int *npkts, | |
595 | int budget) | |
596 | { | |
597 | struct vio_dring_data *pkt = msgbuf; | |
598 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_RX_RING]; | |
599 | struct vio_driver_state *vio = &port->vio; | |
600 | ||
601 | viodbg(DATA, "vnet_rx stype_env[%04x] seq[%016llx] rcv_nxt[%016llx]\n", | |
602 | pkt->tag.stype_env, pkt->seq, dr->rcv_nxt); | |
603 | ||
604 | if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA)) | |
605 | return 0; | |
606 | if (unlikely(pkt->seq != dr->rcv_nxt)) { | |
607 | pr_err("RX out of sequence seq[0x%llx] rcv_nxt[0x%llx]\n", | |
608 | pkt->seq, dr->rcv_nxt); | |
609 | return 0; | |
610 | } | |
611 | ||
612 | if (!port->napi_resume) | |
613 | dr->rcv_nxt++; | |
614 | ||
615 | /* XXX Validate pkt->start_idx and pkt->end_idx XXX */ | |
616 | ||
617 | return vnet_walk_rx(port, dr, pkt->start_idx, pkt->end_idx, | |
618 | npkts, budget); | |
619 | } | |
620 | ||
621 | static int idx_is_pending(struct vio_dring_state *dr, u32 end) | |
622 | { | |
623 | u32 idx = dr->cons; | |
624 | int found = 0; | |
625 | ||
626 | while (idx != dr->prod) { | |
627 | if (idx == end) { | |
628 | found = 1; | |
629 | break; | |
630 | } | |
631 | idx = vio_dring_next(dr, idx); | |
632 | } | |
633 | return found; | |
634 | } | |
635 | ||
636 | static int vnet_ack(struct vnet_port *port, void *msgbuf) | |
637 | { | |
638 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
639 | struct vio_dring_data *pkt = msgbuf; | |
640 | struct net_device *dev; | |
31762eaa AY |
641 | u32 end; |
642 | struct vio_net_desc *desc; | |
643 | struct netdev_queue *txq; | |
644 | ||
645 | if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA)) | |
646 | return 0; | |
647 | ||
648 | end = pkt->end_idx; | |
67d0719f | 649 | dev = VNET_PORT_TO_NET_DEVICE(port); |
31762eaa AY |
650 | netif_tx_lock(dev); |
651 | if (unlikely(!idx_is_pending(dr, end))) { | |
652 | netif_tx_unlock(dev); | |
653 | return 0; | |
654 | } | |
655 | ||
656 | /* sync for race conditions with vnet_start_xmit() and tell xmit it | |
657 | * is time to send a trigger. | |
658 | */ | |
659 | trace_vnet_rx_stopped_ack(port->vio._local_sid, | |
660 | port->vio._peer_sid, end); | |
661 | dr->cons = vio_dring_next(dr, end); | |
662 | desc = vio_dring_entry(dr, dr->cons); | |
663 | if (desc->hdr.state == VIO_DESC_READY && !port->start_cons) { | |
664 | /* vnet_start_xmit() just populated this dring but missed | |
665 | * sending the "start" LDC message to the consumer. | |
666 | * Send a "start" trigger on its behalf. | |
667 | */ | |
668 | if (__vnet_tx_trigger(port, dr->cons) > 0) | |
669 | port->start_cons = false; | |
670 | else | |
671 | port->start_cons = true; | |
672 | } else { | |
673 | port->start_cons = true; | |
674 | } | |
675 | netif_tx_unlock(dev); | |
676 | ||
677 | txq = netdev_get_tx_queue(dev, port->q_index); | |
678 | if (unlikely(netif_tx_queue_stopped(txq) && | |
679 | vnet_tx_dring_avail(dr) >= VNET_TX_WAKEUP_THRESH(dr))) | |
680 | return 1; | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
685 | static int vnet_nack(struct vnet_port *port, void *msgbuf) | |
686 | { | |
687 | /* XXX just reset or similar XXX */ | |
688 | return 0; | |
689 | } | |
690 | ||
691 | static int handle_mcast(struct vnet_port *port, void *msgbuf) | |
692 | { | |
693 | struct vio_net_mcast_info *pkt = msgbuf; | |
67d0719f | 694 | struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port); |
31762eaa AY |
695 | |
696 | if (pkt->tag.stype != VIO_SUBTYPE_ACK) | |
697 | pr_err("%s: Got unexpected MCAST reply [%02x:%02x:%04x:%08x]\n", | |
67d0719f | 698 | dev->name, |
31762eaa AY |
699 | pkt->tag.type, |
700 | pkt->tag.stype, | |
701 | pkt->tag.stype_env, | |
702 | pkt->tag.sid); | |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
707 | /* Got back a STOPPED LDC message on port. If the queue is stopped, | |
708 | * wake it up so that we'll send out another START message at the | |
709 | * next TX. | |
710 | */ | |
711 | static void maybe_tx_wakeup(struct vnet_port *port) | |
712 | { | |
713 | struct netdev_queue *txq; | |
714 | ||
67d0719f AY |
715 | txq = netdev_get_tx_queue(VNET_PORT_TO_NET_DEVICE(port), |
716 | port->q_index); | |
31762eaa AY |
717 | __netif_tx_lock(txq, smp_processor_id()); |
718 | if (likely(netif_tx_queue_stopped(txq))) { | |
719 | struct vio_dring_state *dr; | |
720 | ||
721 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
722 | netif_tx_wake_queue(txq); | |
723 | } | |
724 | __netif_tx_unlock(txq); | |
725 | } | |
726 | ||
67d0719f | 727 | bool sunvnet_port_is_up_common(struct vnet_port *vnet) |
31762eaa AY |
728 | { |
729 | struct vio_driver_state *vio = &vnet->vio; | |
730 | ||
731 | return !!(vio->hs_state & VIO_HS_COMPLETE); | |
732 | } | |
67d0719f | 733 | EXPORT_SYMBOL_GPL(sunvnet_port_is_up_common); |
31762eaa AY |
734 | |
735 | static int vnet_event_napi(struct vnet_port *port, int budget) | |
736 | { | |
737 | struct vio_driver_state *vio = &port->vio; | |
738 | int tx_wakeup, err; | |
739 | int npkts = 0; | |
740 | int event = (port->rx_event & LDC_EVENT_RESET); | |
741 | ||
742 | ldc_ctrl: | |
743 | if (unlikely(event == LDC_EVENT_RESET || | |
744 | event == LDC_EVENT_UP)) { | |
745 | vio_link_state_change(vio, event); | |
746 | ||
747 | if (event == LDC_EVENT_RESET) { | |
748 | vnet_port_reset(port); | |
749 | vio_port_up(vio); | |
750 | } | |
751 | port->rx_event = 0; | |
752 | return 0; | |
753 | } | |
754 | /* We may have multiple LDC events in rx_event. Unroll send_events() */ | |
755 | event = (port->rx_event & LDC_EVENT_UP); | |
dc153f85 | 756 | port->rx_event &= ~(LDC_EVENT_RESET | LDC_EVENT_UP); |
31762eaa AY |
757 | if (event == LDC_EVENT_UP) |
758 | goto ldc_ctrl; | |
759 | event = port->rx_event; | |
760 | if (!(event & LDC_EVENT_DATA_READY)) | |
761 | return 0; | |
762 | ||
763 | /* we dont expect any other bits than RESET, UP, DATA_READY */ | |
764 | BUG_ON(event != LDC_EVENT_DATA_READY); | |
765 | ||
dc153f85 AY |
766 | err = 0; |
767 | tx_wakeup = 0; | |
31762eaa AY |
768 | while (1) { |
769 | union { | |
770 | struct vio_msg_tag tag; | |
771 | u64 raw[8]; | |
772 | } msgbuf; | |
773 | ||
774 | if (port->napi_resume) { | |
775 | struct vio_dring_data *pkt = | |
776 | (struct vio_dring_data *)&msgbuf; | |
777 | struct vio_dring_state *dr = | |
778 | &port->vio.drings[VIO_DRIVER_RX_RING]; | |
779 | ||
780 | pkt->tag.type = VIO_TYPE_DATA; | |
781 | pkt->tag.stype = VIO_SUBTYPE_INFO; | |
782 | pkt->tag.stype_env = VIO_DRING_DATA; | |
783 | pkt->seq = dr->rcv_nxt; | |
dc153f85 AY |
784 | pkt->start_idx = vio_dring_next(dr, |
785 | port->napi_stop_idx); | |
31762eaa AY |
786 | pkt->end_idx = -1; |
787 | goto napi_resume; | |
788 | } | |
789 | err = ldc_read(vio->lp, &msgbuf, sizeof(msgbuf)); | |
790 | if (unlikely(err < 0)) { | |
791 | if (err == -ECONNRESET) | |
792 | vio_conn_reset(vio); | |
793 | break; | |
794 | } | |
795 | if (err == 0) | |
796 | break; | |
797 | viodbg(DATA, "TAG [%02x:%02x:%04x:%08x]\n", | |
798 | msgbuf.tag.type, | |
799 | msgbuf.tag.stype, | |
800 | msgbuf.tag.stype_env, | |
801 | msgbuf.tag.sid); | |
802 | err = vio_validate_sid(vio, &msgbuf.tag); | |
803 | if (err < 0) | |
804 | break; | |
805 | napi_resume: | |
806 | if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) { | |
807 | if (msgbuf.tag.stype == VIO_SUBTYPE_INFO) { | |
67d0719f | 808 | if (!sunvnet_port_is_up_common(port)) { |
31762eaa AY |
809 | /* failures like handshake_failure() |
810 | * may have cleaned up dring, but | |
811 | * NAPI polling may bring us here. | |
812 | */ | |
813 | err = -ECONNRESET; | |
814 | break; | |
815 | } | |
816 | err = vnet_rx(port, &msgbuf, &npkts, budget); | |
817 | if (npkts >= budget) | |
818 | break; | |
819 | if (npkts == 0) | |
820 | break; | |
821 | } else if (msgbuf.tag.stype == VIO_SUBTYPE_ACK) { | |
822 | err = vnet_ack(port, &msgbuf); | |
823 | if (err > 0) | |
824 | tx_wakeup |= err; | |
825 | } else if (msgbuf.tag.stype == VIO_SUBTYPE_NACK) { | |
826 | err = vnet_nack(port, &msgbuf); | |
827 | } | |
828 | } else if (msgbuf.tag.type == VIO_TYPE_CTRL) { | |
829 | if (msgbuf.tag.stype_env == VNET_MCAST_INFO) | |
830 | err = handle_mcast(port, &msgbuf); | |
831 | else | |
832 | err = vio_control_pkt_engine(vio, &msgbuf); | |
833 | if (err) | |
834 | break; | |
835 | } else { | |
836 | err = vnet_handle_unknown(port, &msgbuf); | |
837 | } | |
838 | if (err == -ECONNRESET) | |
839 | break; | |
840 | } | |
841 | if (unlikely(tx_wakeup && err != -ECONNRESET)) | |
842 | maybe_tx_wakeup(port); | |
843 | return npkts; | |
844 | } | |
845 | ||
846 | int sunvnet_poll_common(struct napi_struct *napi, int budget) | |
847 | { | |
848 | struct vnet_port *port = container_of(napi, struct vnet_port, napi); | |
849 | struct vio_driver_state *vio = &port->vio; | |
850 | int processed = vnet_event_napi(port, budget); | |
851 | ||
852 | if (processed < budget) { | |
853 | napi_complete(napi); | |
854 | port->rx_event &= ~LDC_EVENT_DATA_READY; | |
855 | vio_set_intr(vio->vdev->rx_ino, HV_INTR_ENABLED); | |
856 | } | |
857 | return processed; | |
858 | } | |
859 | EXPORT_SYMBOL_GPL(sunvnet_poll_common); | |
860 | ||
861 | void sunvnet_event_common(void *arg, int event) | |
862 | { | |
863 | struct vnet_port *port = arg; | |
864 | struct vio_driver_state *vio = &port->vio; | |
865 | ||
866 | port->rx_event |= event; | |
867 | vio_set_intr(vio->vdev->rx_ino, HV_INTR_DISABLED); | |
868 | napi_schedule(&port->napi); | |
31762eaa AY |
869 | } |
870 | EXPORT_SYMBOL_GPL(sunvnet_event_common); | |
871 | ||
872 | static int __vnet_tx_trigger(struct vnet_port *port, u32 start) | |
873 | { | |
874 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
875 | struct vio_dring_data hdr = { | |
876 | .tag = { | |
877 | .type = VIO_TYPE_DATA, | |
878 | .stype = VIO_SUBTYPE_INFO, | |
879 | .stype_env = VIO_DRING_DATA, | |
880 | .sid = vio_send_sid(&port->vio), | |
881 | }, | |
882 | .dring_ident = dr->ident, | |
883 | .start_idx = start, | |
dc153f85 | 884 | .end_idx = (u32)-1, |
31762eaa AY |
885 | }; |
886 | int err, delay; | |
887 | int retries = 0; | |
888 | ||
889 | if (port->stop_rx) { | |
890 | trace_vnet_tx_pending_stopped_ack(port->vio._local_sid, | |
891 | port->vio._peer_sid, | |
892 | port->stop_rx_idx, -1); | |
893 | err = vnet_send_ack(port, | |
894 | &port->vio.drings[VIO_DRIVER_RX_RING], | |
895 | port->stop_rx_idx, -1, | |
896 | VIO_DRING_STOPPED); | |
897 | if (err <= 0) | |
898 | return err; | |
899 | } | |
900 | ||
901 | hdr.seq = dr->snd_nxt; | |
902 | delay = 1; | |
903 | do { | |
904 | err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr)); | |
905 | if (err > 0) { | |
906 | dr->snd_nxt++; | |
907 | break; | |
908 | } | |
909 | udelay(delay); | |
910 | if ((delay <<= 1) > 128) | |
911 | delay = 128; | |
912 | if (retries++ > VNET_MAX_RETRIES) | |
913 | break; | |
914 | } while (err == -EAGAIN); | |
915 | trace_vnet_tx_trigger(port->vio._local_sid, | |
916 | port->vio._peer_sid, start, err); | |
917 | ||
918 | return err; | |
919 | } | |
920 | ||
31762eaa AY |
921 | static struct sk_buff *vnet_clean_tx_ring(struct vnet_port *port, |
922 | unsigned *pending) | |
923 | { | |
924 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
925 | struct sk_buff *skb = NULL; | |
926 | int i, txi; | |
927 | ||
928 | *pending = 0; | |
929 | ||
930 | txi = dr->prod; | |
931 | for (i = 0; i < VNET_TX_RING_SIZE; ++i) { | |
932 | struct vio_net_desc *d; | |
933 | ||
934 | --txi; | |
935 | if (txi < 0) | |
dc153f85 | 936 | txi = VNET_TX_RING_SIZE - 1; |
31762eaa AY |
937 | |
938 | d = vio_dring_entry(dr, txi); | |
939 | ||
940 | if (d->hdr.state == VIO_DESC_READY) { | |
941 | (*pending)++; | |
942 | continue; | |
943 | } | |
944 | if (port->tx_bufs[txi].skb) { | |
945 | if (d->hdr.state != VIO_DESC_DONE) | |
946 | pr_notice("invalid ring buffer state %d\n", | |
947 | d->hdr.state); | |
948 | BUG_ON(port->tx_bufs[txi].skb->next); | |
949 | ||
950 | port->tx_bufs[txi].skb->next = skb; | |
951 | skb = port->tx_bufs[txi].skb; | |
952 | port->tx_bufs[txi].skb = NULL; | |
953 | ||
954 | ldc_unmap(port->vio.lp, | |
955 | port->tx_bufs[txi].cookies, | |
956 | port->tx_bufs[txi].ncookies); | |
dc153f85 | 957 | } else if (d->hdr.state == VIO_DESC_FREE) { |
31762eaa | 958 | break; |
dc153f85 | 959 | } |
31762eaa AY |
960 | d->hdr.state = VIO_DESC_FREE; |
961 | } | |
962 | return skb; | |
963 | } | |
964 | ||
965 | static inline void vnet_free_skbs(struct sk_buff *skb) | |
966 | { | |
967 | struct sk_buff *next; | |
968 | ||
969 | while (skb) { | |
970 | next = skb->next; | |
971 | skb->next = NULL; | |
972 | dev_kfree_skb(skb); | |
973 | skb = next; | |
974 | } | |
975 | } | |
976 | ||
977 | void sunvnet_clean_timer_expire_common(unsigned long port0) | |
978 | { | |
979 | struct vnet_port *port = (struct vnet_port *)port0; | |
980 | struct sk_buff *freeskbs; | |
981 | unsigned pending; | |
982 | ||
67d0719f | 983 | netif_tx_lock(VNET_PORT_TO_NET_DEVICE(port)); |
31762eaa | 984 | freeskbs = vnet_clean_tx_ring(port, &pending); |
67d0719f | 985 | netif_tx_unlock(VNET_PORT_TO_NET_DEVICE(port)); |
31762eaa AY |
986 | |
987 | vnet_free_skbs(freeskbs); | |
988 | ||
989 | if (pending) | |
990 | (void)mod_timer(&port->clean_timer, | |
991 | jiffies + VNET_CLEAN_TIMEOUT); | |
992 | else | |
993 | del_timer(&port->clean_timer); | |
994 | } | |
995 | EXPORT_SYMBOL_GPL(sunvnet_clean_timer_expire_common); | |
996 | ||
997 | static inline int vnet_skb_map(struct ldc_channel *lp, struct sk_buff *skb, | |
998 | struct ldc_trans_cookie *cookies, int ncookies, | |
999 | unsigned int map_perm) | |
1000 | { | |
1001 | int i, nc, err, blen; | |
1002 | ||
1003 | /* header */ | |
1004 | blen = skb_headlen(skb); | |
1005 | if (blen < ETH_ZLEN) | |
1006 | blen = ETH_ZLEN; | |
1007 | blen += VNET_PACKET_SKIP; | |
1008 | blen += 8 - (blen & 7); | |
1009 | ||
dc153f85 | 1010 | err = ldc_map_single(lp, skb->data - VNET_PACKET_SKIP, blen, cookies, |
31762eaa AY |
1011 | ncookies, map_perm); |
1012 | if (err < 0) | |
1013 | return err; | |
1014 | nc = err; | |
1015 | ||
1016 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1017 | skb_frag_t *f = &skb_shinfo(skb)->frags[i]; | |
1018 | u8 *vaddr; | |
1019 | ||
1020 | if (nc < ncookies) { | |
1021 | vaddr = kmap_atomic(skb_frag_page(f)); | |
1022 | blen = skb_frag_size(f); | |
1023 | blen += 8 - (blen & 7); | |
1024 | err = ldc_map_single(lp, vaddr + f->page_offset, | |
1025 | blen, cookies + nc, ncookies - nc, | |
1026 | map_perm); | |
1027 | kunmap_atomic(vaddr); | |
1028 | } else { | |
1029 | err = -EMSGSIZE; | |
1030 | } | |
1031 | ||
1032 | if (err < 0) { | |
1033 | ldc_unmap(lp, cookies, nc); | |
1034 | return err; | |
1035 | } | |
1036 | nc += err; | |
1037 | } | |
1038 | return nc; | |
1039 | } | |
1040 | ||
1041 | static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, int ncookies) | |
1042 | { | |
1043 | struct sk_buff *nskb; | |
1044 | int i, len, pad, docopy; | |
1045 | ||
1046 | len = skb->len; | |
1047 | pad = 0; | |
1048 | if (len < ETH_ZLEN) { | |
1049 | pad += ETH_ZLEN - skb->len; | |
1050 | len += pad; | |
1051 | } | |
1052 | len += VNET_PACKET_SKIP; | |
1053 | pad += 8 - (len & 7); | |
1054 | ||
1055 | /* make sure we have enough cookies and alignment in every frag */ | |
1056 | docopy = skb_shinfo(skb)->nr_frags >= ncookies; | |
1057 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1058 | skb_frag_t *f = &skb_shinfo(skb)->frags[i]; | |
1059 | ||
1060 | docopy |= f->page_offset & 7; | |
1061 | } | |
1062 | if (((unsigned long)skb->data & 7) != VNET_PACKET_SKIP || | |
1063 | skb_tailroom(skb) < pad || | |
1064 | skb_headroom(skb) < VNET_PACKET_SKIP || docopy) { | |
1065 | int start = 0, offset; | |
1066 | __wsum csum; | |
1067 | ||
1068 | len = skb->len > ETH_ZLEN ? skb->len : ETH_ZLEN; | |
1069 | nskb = alloc_and_align_skb(skb->dev, len); | |
dc153f85 | 1070 | if (!nskb) { |
31762eaa AY |
1071 | dev_kfree_skb(skb); |
1072 | return NULL; | |
1073 | } | |
1074 | skb_reserve(nskb, VNET_PACKET_SKIP); | |
1075 | ||
1076 | nskb->protocol = skb->protocol; | |
1077 | offset = skb_mac_header(skb) - skb->data; | |
1078 | skb_set_mac_header(nskb, offset); | |
1079 | offset = skb_network_header(skb) - skb->data; | |
1080 | skb_set_network_header(nskb, offset); | |
1081 | offset = skb_transport_header(skb) - skb->data; | |
1082 | skb_set_transport_header(nskb, offset); | |
1083 | ||
1084 | offset = 0; | |
1085 | nskb->csum_offset = skb->csum_offset; | |
1086 | nskb->ip_summed = skb->ip_summed; | |
1087 | ||
1088 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
1089 | start = skb_checksum_start_offset(skb); | |
1090 | if (start) { | |
1091 | struct iphdr *iph = ip_hdr(nskb); | |
1092 | int offset = start + nskb->csum_offset; | |
1093 | ||
1094 | if (skb_copy_bits(skb, 0, nskb->data, start)) { | |
1095 | dev_kfree_skb(nskb); | |
1096 | dev_kfree_skb(skb); | |
1097 | return NULL; | |
1098 | } | |
1099 | *(__sum16 *)(skb->data + offset) = 0; | |
1100 | csum = skb_copy_and_csum_bits(skb, start, | |
1101 | nskb->data + start, | |
1102 | skb->len - start, 0); | |
1103 | if (iph->protocol == IPPROTO_TCP || | |
1104 | iph->protocol == IPPROTO_UDP) { | |
1105 | csum = csum_tcpudp_magic(iph->saddr, iph->daddr, | |
1106 | skb->len - start, | |
1107 | iph->protocol, csum); | |
1108 | } | |
1109 | *(__sum16 *)(nskb->data + offset) = csum; | |
1110 | ||
1111 | nskb->ip_summed = CHECKSUM_NONE; | |
1112 | } else if (skb_copy_bits(skb, 0, nskb->data, skb->len)) { | |
1113 | dev_kfree_skb(nskb); | |
1114 | dev_kfree_skb(skb); | |
1115 | return NULL; | |
1116 | } | |
1117 | (void)skb_put(nskb, skb->len); | |
1118 | if (skb_is_gso(skb)) { | |
1119 | skb_shinfo(nskb)->gso_size = skb_shinfo(skb)->gso_size; | |
1120 | skb_shinfo(nskb)->gso_type = skb_shinfo(skb)->gso_type; | |
1121 | } | |
1122 | nskb->queue_mapping = skb->queue_mapping; | |
1123 | dev_kfree_skb(skb); | |
1124 | skb = nskb; | |
1125 | } | |
1126 | return skb; | |
1127 | } | |
1128 | ||
67d0719f AY |
1129 | static int vnet_handle_offloads(struct vnet_port *port, struct sk_buff *skb, |
1130 | struct vnet_port *(*vnet_tx_port) | |
1131 | (struct sk_buff *, struct net_device *)) | |
31762eaa | 1132 | { |
67d0719f | 1133 | struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port); |
31762eaa AY |
1134 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
1135 | struct sk_buff *segs; | |
1136 | int maclen, datalen; | |
1137 | int status; | |
1138 | int gso_size, gso_type, gso_segs; | |
1139 | int hlen = skb_transport_header(skb) - skb_mac_header(skb); | |
1140 | int proto = IPPROTO_IP; | |
1141 | ||
1142 | if (skb->protocol == htons(ETH_P_IP)) | |
1143 | proto = ip_hdr(skb)->protocol; | |
1144 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
1145 | proto = ipv6_hdr(skb)->nexthdr; | |
1146 | ||
dc153f85 | 1147 | if (proto == IPPROTO_TCP) { |
31762eaa | 1148 | hlen += tcp_hdr(skb)->doff * 4; |
dc153f85 | 1149 | } else if (proto == IPPROTO_UDP) { |
31762eaa | 1150 | hlen += sizeof(struct udphdr); |
dc153f85 | 1151 | } else { |
31762eaa AY |
1152 | pr_err("vnet_handle_offloads GSO with unknown transport " |
1153 | "protocol %d tproto %d\n", skb->protocol, proto); | |
1154 | hlen = 128; /* XXX */ | |
1155 | } | |
1156 | datalen = port->tsolen - hlen; | |
1157 | ||
1158 | gso_size = skb_shinfo(skb)->gso_size; | |
1159 | gso_type = skb_shinfo(skb)->gso_type; | |
1160 | gso_segs = skb_shinfo(skb)->gso_segs; | |
1161 | ||
1162 | if (port->tso && gso_size < datalen) | |
1163 | gso_segs = DIV_ROUND_UP(skb->len - hlen, datalen); | |
1164 | ||
1165 | if (unlikely(vnet_tx_dring_avail(dr) < gso_segs)) { | |
1166 | struct netdev_queue *txq; | |
1167 | ||
1168 | txq = netdev_get_tx_queue(dev, port->q_index); | |
1169 | netif_tx_stop_queue(txq); | |
1170 | if (vnet_tx_dring_avail(dr) < skb_shinfo(skb)->gso_segs) | |
1171 | return NETDEV_TX_BUSY; | |
1172 | netif_tx_wake_queue(txq); | |
1173 | } | |
1174 | ||
1175 | maclen = skb_network_header(skb) - skb_mac_header(skb); | |
1176 | skb_pull(skb, maclen); | |
1177 | ||
1178 | if (port->tso && gso_size < datalen) { | |
1179 | if (skb_unclone(skb, GFP_ATOMIC)) | |
1180 | goto out_dropped; | |
1181 | ||
1182 | /* segment to TSO size */ | |
1183 | skb_shinfo(skb)->gso_size = datalen; | |
1184 | skb_shinfo(skb)->gso_segs = gso_segs; | |
1185 | } | |
1186 | segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO); | |
1187 | if (IS_ERR(segs)) | |
1188 | goto out_dropped; | |
1189 | ||
1190 | skb_push(skb, maclen); | |
1191 | skb_reset_mac_header(skb); | |
1192 | ||
1193 | status = 0; | |
1194 | while (segs) { | |
1195 | struct sk_buff *curr = segs; | |
1196 | ||
1197 | segs = segs->next; | |
1198 | curr->next = NULL; | |
1199 | if (port->tso && curr->len > dev->mtu) { | |
1200 | skb_shinfo(curr)->gso_size = gso_size; | |
1201 | skb_shinfo(curr)->gso_type = gso_type; | |
1202 | skb_shinfo(curr)->gso_segs = | |
1203 | DIV_ROUND_UP(curr->len - hlen, gso_size); | |
dc153f85 | 1204 | } else { |
31762eaa | 1205 | skb_shinfo(curr)->gso_size = 0; |
dc153f85 | 1206 | } |
31762eaa AY |
1207 | |
1208 | skb_push(curr, maclen); | |
1209 | skb_reset_mac_header(curr); | |
1210 | memcpy(skb_mac_header(curr), skb_mac_header(skb), | |
1211 | maclen); | |
1212 | curr->csum_start = skb_transport_header(curr) - curr->head; | |
1213 | if (ip_hdr(curr)->protocol == IPPROTO_TCP) | |
1214 | curr->csum_offset = offsetof(struct tcphdr, check); | |
1215 | else if (ip_hdr(curr)->protocol == IPPROTO_UDP) | |
1216 | curr->csum_offset = offsetof(struct udphdr, check); | |
1217 | ||
1218 | if (!(status & NETDEV_TX_MASK)) | |
67d0719f AY |
1219 | status = sunvnet_start_xmit_common(curr, dev, |
1220 | vnet_tx_port); | |
31762eaa AY |
1221 | if (status & NETDEV_TX_MASK) |
1222 | dev_kfree_skb_any(curr); | |
1223 | } | |
1224 | ||
1225 | if (!(status & NETDEV_TX_MASK)) | |
1226 | dev_kfree_skb_any(skb); | |
1227 | return status; | |
1228 | out_dropped: | |
1229 | dev->stats.tx_dropped++; | |
1230 | dev_kfree_skb_any(skb); | |
1231 | return NETDEV_TX_OK; | |
1232 | } | |
1233 | ||
67d0719f AY |
1234 | int sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev, |
1235 | struct vnet_port *(*vnet_tx_port) | |
1236 | (struct sk_buff *, struct net_device *)) | |
31762eaa | 1237 | { |
31762eaa AY |
1238 | struct vnet_port *port = NULL; |
1239 | struct vio_dring_state *dr; | |
1240 | struct vio_net_desc *d; | |
1241 | unsigned int len; | |
1242 | struct sk_buff *freeskbs = NULL; | |
1243 | int i, err, txi; | |
1244 | unsigned pending = 0; | |
1245 | struct netdev_queue *txq; | |
1246 | ||
1247 | rcu_read_lock(); | |
67d0719f | 1248 | port = vnet_tx_port(skb, dev); |
31762eaa AY |
1249 | if (unlikely(!port)) { |
1250 | rcu_read_unlock(); | |
1251 | goto out_dropped; | |
1252 | } | |
1253 | ||
1254 | if (skb_is_gso(skb) && skb->len > port->tsolen) { | |
67d0719f | 1255 | err = vnet_handle_offloads(port, skb, vnet_tx_port); |
31762eaa AY |
1256 | rcu_read_unlock(); |
1257 | return err; | |
1258 | } | |
1259 | ||
1260 | if (!skb_is_gso(skb) && skb->len > port->rmtu) { | |
1261 | unsigned long localmtu = port->rmtu - ETH_HLEN; | |
1262 | ||
1263 | if (vio_version_after_eq(&port->vio, 1, 3)) | |
1264 | localmtu -= VLAN_HLEN; | |
1265 | ||
1266 | if (skb->protocol == htons(ETH_P_IP)) { | |
1267 | struct flowi4 fl4; | |
1268 | struct rtable *rt = NULL; | |
1269 | ||
1270 | memset(&fl4, 0, sizeof(fl4)); | |
1271 | fl4.flowi4_oif = dev->ifindex; | |
1272 | fl4.flowi4_tos = RT_TOS(ip_hdr(skb)->tos); | |
1273 | fl4.daddr = ip_hdr(skb)->daddr; | |
1274 | fl4.saddr = ip_hdr(skb)->saddr; | |
1275 | ||
1276 | rt = ip_route_output_key(dev_net(dev), &fl4); | |
1277 | rcu_read_unlock(); | |
1278 | if (!IS_ERR(rt)) { | |
1279 | skb_dst_set(skb, &rt->dst); | |
1280 | icmp_send(skb, ICMP_DEST_UNREACH, | |
1281 | ICMP_FRAG_NEEDED, | |
1282 | htonl(localmtu)); | |
1283 | } | |
1284 | } | |
1285 | #if IS_ENABLED(CONFIG_IPV6) | |
1286 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
1287 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, localmtu); | |
1288 | #endif | |
1289 | goto out_dropped; | |
1290 | } | |
1291 | ||
1292 | skb = vnet_skb_shape(skb, 2); | |
1293 | ||
1294 | if (unlikely(!skb)) | |
1295 | goto out_dropped; | |
1296 | ||
1297 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
1298 | vnet_fullcsum(skb); | |
1299 | ||
1300 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
1301 | i = skb_get_queue_mapping(skb); | |
1302 | txq = netdev_get_tx_queue(dev, i); | |
1303 | if (unlikely(vnet_tx_dring_avail(dr) < 1)) { | |
1304 | if (!netif_tx_queue_stopped(txq)) { | |
1305 | netif_tx_stop_queue(txq); | |
1306 | ||
1307 | /* This is a hard error, log it. */ | |
1308 | netdev_err(dev, "BUG! Tx Ring full when queue awake!\n"); | |
1309 | dev->stats.tx_errors++; | |
1310 | } | |
1311 | rcu_read_unlock(); | |
1312 | return NETDEV_TX_BUSY; | |
1313 | } | |
1314 | ||
1315 | d = vio_dring_cur(dr); | |
1316 | ||
1317 | txi = dr->prod; | |
1318 | ||
1319 | freeskbs = vnet_clean_tx_ring(port, &pending); | |
1320 | ||
1321 | BUG_ON(port->tx_bufs[txi].skb); | |
1322 | ||
1323 | len = skb->len; | |
1324 | if (len < ETH_ZLEN) | |
1325 | len = ETH_ZLEN; | |
1326 | ||
1327 | err = vnet_skb_map(port->vio.lp, skb, port->tx_bufs[txi].cookies, 2, | |
1328 | (LDC_MAP_SHADOW | LDC_MAP_DIRECT | LDC_MAP_RW)); | |
1329 | if (err < 0) { | |
1330 | netdev_info(dev, "tx buffer map error %d\n", err); | |
1331 | goto out_dropped; | |
1332 | } | |
1333 | ||
1334 | port->tx_bufs[txi].skb = skb; | |
1335 | skb = NULL; | |
1336 | port->tx_bufs[txi].ncookies = err; | |
1337 | ||
1338 | /* We don't rely on the ACKs to free the skb in vnet_start_xmit(), | |
1339 | * thus it is safe to not set VIO_ACK_ENABLE for each transmission: | |
1340 | * the protocol itself does not require it as long as the peer | |
1341 | * sends a VIO_SUBTYPE_ACK for VIO_DRING_STOPPED. | |
1342 | * | |
1343 | * An ACK for every packet in the ring is expensive as the | |
1344 | * sending of LDC messages is slow and affects performance. | |
1345 | */ | |
1346 | d->hdr.ack = VIO_ACK_DISABLE; | |
1347 | d->size = len; | |
1348 | d->ncookies = port->tx_bufs[txi].ncookies; | |
1349 | for (i = 0; i < d->ncookies; i++) | |
1350 | d->cookies[i] = port->tx_bufs[txi].cookies[i]; | |
1351 | if (vio_version_after_eq(&port->vio, 1, 7)) { | |
1352 | struct vio_net_dext *dext = vio_net_ext(d); | |
1353 | ||
1354 | memset(dext, 0, sizeof(*dext)); | |
1355 | if (skb_is_gso(port->tx_bufs[txi].skb)) { | |
1356 | dext->ipv4_lso_mss = skb_shinfo(port->tx_bufs[txi].skb) | |
1357 | ->gso_size; | |
1358 | dext->flags |= VNET_PKT_IPV4_LSO; | |
1359 | } | |
1360 | if (vio_version_after_eq(&port->vio, 1, 8) && | |
1361 | !port->switch_port) { | |
1362 | dext->flags |= VNET_PKT_HCK_IPV4_HDRCKSUM_OK; | |
1363 | dext->flags |= VNET_PKT_HCK_FULLCKSUM_OK; | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | /* This has to be a non-SMP write barrier because we are writing | |
1368 | * to memory which is shared with the peer LDOM. | |
1369 | */ | |
1370 | dma_wmb(); | |
1371 | ||
1372 | d->hdr.state = VIO_DESC_READY; | |
1373 | ||
1374 | /* Exactly one ldc "start" trigger (for dr->cons) needs to be sent | |
1375 | * to notify the consumer that some descriptors are READY. | |
1376 | * After that "start" trigger, no additional triggers are needed until | |
1377 | * a DRING_STOPPED is received from the consumer. The dr->cons field | |
1378 | * (set up by vnet_ack()) has the value of the next dring index | |
1379 | * that has not yet been ack-ed. We send a "start" trigger here | |
1380 | * if, and only if, start_cons is true (reset it afterward). Conversely, | |
1381 | * vnet_ack() should check if the dring corresponding to cons | |
1382 | * is marked READY, but start_cons was false. | |
1383 | * If so, vnet_ack() should send out the missed "start" trigger. | |
1384 | * | |
1385 | * Note that the dma_wmb() above makes sure the cookies et al. are | |
1386 | * not globally visible before the VIO_DESC_READY, and that the | |
1387 | * stores are ordered correctly by the compiler. The consumer will | |
1388 | * not proceed until the VIO_DESC_READY is visible assuring that | |
1389 | * the consumer does not observe anything related to descriptors | |
1390 | * out of order. The HV trap from the LDC start trigger is the | |
1391 | * producer to consumer announcement that work is available to the | |
1392 | * consumer | |
1393 | */ | |
1394 | if (!port->start_cons) { /* previous trigger suffices */ | |
1395 | trace_vnet_skip_tx_trigger(port->vio._local_sid, | |
1396 | port->vio._peer_sid, dr->cons); | |
1397 | goto ldc_start_done; | |
1398 | } | |
1399 | ||
1400 | err = __vnet_tx_trigger(port, dr->cons); | |
1401 | if (unlikely(err < 0)) { | |
1402 | netdev_info(dev, "TX trigger error %d\n", err); | |
1403 | d->hdr.state = VIO_DESC_FREE; | |
1404 | skb = port->tx_bufs[txi].skb; | |
1405 | port->tx_bufs[txi].skb = NULL; | |
1406 | dev->stats.tx_carrier_errors++; | |
1407 | goto out_dropped; | |
1408 | } | |
1409 | ||
1410 | ldc_start_done: | |
1411 | port->start_cons = false; | |
1412 | ||
1413 | dev->stats.tx_packets++; | |
1414 | dev->stats.tx_bytes += port->tx_bufs[txi].skb->len; | |
1415 | ||
1416 | dr->prod = (dr->prod + 1) & (VNET_TX_RING_SIZE - 1); | |
1417 | if (unlikely(vnet_tx_dring_avail(dr) < 1)) { | |
1418 | netif_tx_stop_queue(txq); | |
1419 | if (vnet_tx_dring_avail(dr) > VNET_TX_WAKEUP_THRESH(dr)) | |
1420 | netif_tx_wake_queue(txq); | |
1421 | } | |
1422 | ||
1423 | (void)mod_timer(&port->clean_timer, jiffies + VNET_CLEAN_TIMEOUT); | |
1424 | rcu_read_unlock(); | |
1425 | ||
1426 | vnet_free_skbs(freeskbs); | |
1427 | ||
1428 | return NETDEV_TX_OK; | |
1429 | ||
1430 | out_dropped: | |
1431 | if (pending) | |
1432 | (void)mod_timer(&port->clean_timer, | |
1433 | jiffies + VNET_CLEAN_TIMEOUT); | |
1434 | else if (port) | |
1435 | del_timer(&port->clean_timer); | |
1436 | if (port) | |
1437 | rcu_read_unlock(); | |
1438 | if (skb) | |
1439 | dev_kfree_skb(skb); | |
1440 | vnet_free_skbs(freeskbs); | |
1441 | dev->stats.tx_dropped++; | |
1442 | return NETDEV_TX_OK; | |
1443 | } | |
1444 | EXPORT_SYMBOL_GPL(sunvnet_start_xmit_common); | |
1445 | ||
1446 | void sunvnet_tx_timeout_common(struct net_device *dev) | |
1447 | { | |
1448 | /* XXX Implement me XXX */ | |
1449 | } | |
1450 | EXPORT_SYMBOL_GPL(sunvnet_tx_timeout_common); | |
1451 | ||
1452 | int sunvnet_open_common(struct net_device *dev) | |
1453 | { | |
1454 | netif_carrier_on(dev); | |
1455 | netif_tx_start_all_queues(dev); | |
1456 | ||
1457 | return 0; | |
1458 | } | |
1459 | EXPORT_SYMBOL_GPL(sunvnet_open_common); | |
1460 | ||
1461 | int sunvnet_close_common(struct net_device *dev) | |
1462 | { | |
1463 | netif_tx_stop_all_queues(dev); | |
1464 | netif_carrier_off(dev); | |
1465 | ||
1466 | return 0; | |
1467 | } | |
1468 | EXPORT_SYMBOL_GPL(sunvnet_close_common); | |
1469 | ||
1470 | static struct vnet_mcast_entry *__vnet_mc_find(struct vnet *vp, u8 *addr) | |
1471 | { | |
1472 | struct vnet_mcast_entry *m; | |
1473 | ||
1474 | for (m = vp->mcast_list; m; m = m->next) { | |
1475 | if (ether_addr_equal(m->addr, addr)) | |
1476 | return m; | |
1477 | } | |
1478 | return NULL; | |
1479 | } | |
1480 | ||
1481 | static void __update_mc_list(struct vnet *vp, struct net_device *dev) | |
1482 | { | |
1483 | struct netdev_hw_addr *ha; | |
1484 | ||
1485 | netdev_for_each_mc_addr(ha, dev) { | |
1486 | struct vnet_mcast_entry *m; | |
1487 | ||
1488 | m = __vnet_mc_find(vp, ha->addr); | |
1489 | if (m) { | |
1490 | m->hit = 1; | |
1491 | continue; | |
1492 | } | |
1493 | ||
1494 | if (!m) { | |
1495 | m = kzalloc(sizeof(*m), GFP_ATOMIC); | |
1496 | if (!m) | |
1497 | continue; | |
1498 | memcpy(m->addr, ha->addr, ETH_ALEN); | |
1499 | m->hit = 1; | |
1500 | ||
1501 | m->next = vp->mcast_list; | |
1502 | vp->mcast_list = m; | |
1503 | } | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | static void __send_mc_list(struct vnet *vp, struct vnet_port *port) | |
1508 | { | |
1509 | struct vio_net_mcast_info info; | |
1510 | struct vnet_mcast_entry *m, **pp; | |
1511 | int n_addrs; | |
1512 | ||
1513 | memset(&info, 0, sizeof(info)); | |
1514 | ||
1515 | info.tag.type = VIO_TYPE_CTRL; | |
1516 | info.tag.stype = VIO_SUBTYPE_INFO; | |
1517 | info.tag.stype_env = VNET_MCAST_INFO; | |
1518 | info.tag.sid = vio_send_sid(&port->vio); | |
1519 | info.set = 1; | |
1520 | ||
1521 | n_addrs = 0; | |
1522 | for (m = vp->mcast_list; m; m = m->next) { | |
1523 | if (m->sent) | |
1524 | continue; | |
1525 | m->sent = 1; | |
1526 | memcpy(&info.mcast_addr[n_addrs * ETH_ALEN], | |
1527 | m->addr, ETH_ALEN); | |
1528 | if (++n_addrs == VNET_NUM_MCAST) { | |
1529 | info.count = n_addrs; | |
1530 | ||
dc153f85 AY |
1531 | (void)vio_ldc_send(&port->vio, &info, |
1532 | sizeof(info)); | |
31762eaa AY |
1533 | n_addrs = 0; |
1534 | } | |
1535 | } | |
1536 | if (n_addrs) { | |
1537 | info.count = n_addrs; | |
dc153f85 | 1538 | (void)vio_ldc_send(&port->vio, &info, sizeof(info)); |
31762eaa AY |
1539 | } |
1540 | ||
1541 | info.set = 0; | |
1542 | ||
1543 | n_addrs = 0; | |
1544 | pp = &vp->mcast_list; | |
1545 | while ((m = *pp) != NULL) { | |
1546 | if (m->hit) { | |
1547 | m->hit = 0; | |
1548 | pp = &m->next; | |
1549 | continue; | |
1550 | } | |
1551 | ||
1552 | memcpy(&info.mcast_addr[n_addrs * ETH_ALEN], | |
1553 | m->addr, ETH_ALEN); | |
1554 | if (++n_addrs == VNET_NUM_MCAST) { | |
1555 | info.count = n_addrs; | |
dc153f85 AY |
1556 | (void)vio_ldc_send(&port->vio, &info, |
1557 | sizeof(info)); | |
31762eaa AY |
1558 | n_addrs = 0; |
1559 | } | |
1560 | ||
1561 | *pp = m->next; | |
1562 | kfree(m); | |
1563 | } | |
1564 | if (n_addrs) { | |
1565 | info.count = n_addrs; | |
dc153f85 | 1566 | (void)vio_ldc_send(&port->vio, &info, sizeof(info)); |
31762eaa AY |
1567 | } |
1568 | } | |
1569 | ||
67d0719f | 1570 | void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp) |
31762eaa | 1571 | { |
31762eaa AY |
1572 | struct vnet_port *port; |
1573 | ||
1574 | rcu_read_lock(); | |
1575 | list_for_each_entry_rcu(port, &vp->port_list, list) { | |
31762eaa AY |
1576 | if (port->switch_port) { |
1577 | __update_mc_list(vp, dev); | |
1578 | __send_mc_list(vp, port); | |
1579 | break; | |
1580 | } | |
1581 | } | |
1582 | rcu_read_unlock(); | |
1583 | } | |
1584 | EXPORT_SYMBOL_GPL(sunvnet_set_rx_mode_common); | |
1585 | ||
1586 | int sunvnet_change_mtu_common(struct net_device *dev, int new_mtu) | |
1587 | { | |
1588 | if (new_mtu < 68 || new_mtu > 65535) | |
1589 | return -EINVAL; | |
1590 | ||
1591 | dev->mtu = new_mtu; | |
1592 | return 0; | |
1593 | } | |
1594 | EXPORT_SYMBOL_GPL(sunvnet_change_mtu_common); | |
1595 | ||
1596 | int sunvnet_set_mac_addr_common(struct net_device *dev, void *p) | |
1597 | { | |
1598 | return -EINVAL; | |
1599 | } | |
1600 | EXPORT_SYMBOL_GPL(sunvnet_set_mac_addr_common); | |
1601 | ||
1602 | void sunvnet_port_free_tx_bufs_common(struct vnet_port *port) | |
1603 | { | |
1604 | struct vio_dring_state *dr; | |
1605 | int i; | |
1606 | ||
1607 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
1608 | ||
dc153f85 | 1609 | if (!dr->base) |
31762eaa AY |
1610 | return; |
1611 | ||
1612 | for (i = 0; i < VNET_TX_RING_SIZE; i++) { | |
1613 | struct vio_net_desc *d; | |
1614 | void *skb = port->tx_bufs[i].skb; | |
1615 | ||
1616 | if (!skb) | |
1617 | continue; | |
1618 | ||
1619 | d = vio_dring_entry(dr, i); | |
1620 | ||
1621 | ldc_unmap(port->vio.lp, | |
1622 | port->tx_bufs[i].cookies, | |
1623 | port->tx_bufs[i].ncookies); | |
1624 | dev_kfree_skb(skb); | |
1625 | port->tx_bufs[i].skb = NULL; | |
1626 | d->hdr.state = VIO_DESC_FREE; | |
1627 | } | |
1628 | ldc_free_exp_dring(port->vio.lp, dr->base, | |
1629 | (dr->entry_size * dr->num_entries), | |
1630 | dr->cookies, dr->ncookies); | |
1631 | dr->base = NULL; | |
1632 | dr->entry_size = 0; | |
1633 | dr->num_entries = 0; | |
1634 | dr->pending = 0; | |
1635 | dr->ncookies = 0; | |
1636 | } | |
1637 | EXPORT_SYMBOL_GPL(sunvnet_port_free_tx_bufs_common); | |
1638 | ||
1639 | static void vnet_port_reset(struct vnet_port *port) | |
1640 | { | |
1641 | del_timer(&port->clean_timer); | |
1642 | sunvnet_port_free_tx_bufs_common(port); | |
1643 | port->rmtu = 0; | |
1644 | port->tso = true; | |
1645 | port->tsolen = 0; | |
1646 | } | |
1647 | ||
1648 | static int vnet_port_alloc_tx_ring(struct vnet_port *port) | |
1649 | { | |
1650 | struct vio_dring_state *dr; | |
1651 | unsigned long len, elen; | |
1652 | int i, err, ncookies; | |
1653 | void *dring; | |
1654 | ||
1655 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
1656 | ||
1657 | elen = sizeof(struct vio_net_desc) + | |
1658 | sizeof(struct ldc_trans_cookie) * 2; | |
1659 | if (vio_version_after_eq(&port->vio, 1, 7)) | |
1660 | elen += sizeof(struct vio_net_dext); | |
1661 | len = VNET_TX_RING_SIZE * elen; | |
1662 | ||
1663 | ncookies = VIO_MAX_RING_COOKIES; | |
1664 | dring = ldc_alloc_exp_dring(port->vio.lp, len, | |
1665 | dr->cookies, &ncookies, | |
1666 | (LDC_MAP_SHADOW | | |
1667 | LDC_MAP_DIRECT | | |
1668 | LDC_MAP_RW)); | |
1669 | if (IS_ERR(dring)) { | |
1670 | err = PTR_ERR(dring); | |
1671 | goto err_out; | |
1672 | } | |
1673 | ||
1674 | dr->base = dring; | |
1675 | dr->entry_size = elen; | |
1676 | dr->num_entries = VNET_TX_RING_SIZE; | |
dc153f85 AY |
1677 | dr->prod = 0; |
1678 | dr->cons = 0; | |
31762eaa AY |
1679 | port->start_cons = true; /* need an initial trigger */ |
1680 | dr->pending = VNET_TX_RING_SIZE; | |
1681 | dr->ncookies = ncookies; | |
1682 | ||
1683 | for (i = 0; i < VNET_TX_RING_SIZE; ++i) { | |
1684 | struct vio_net_desc *d; | |
1685 | ||
1686 | d = vio_dring_entry(dr, i); | |
1687 | d->hdr.state = VIO_DESC_FREE; | |
1688 | } | |
1689 | return 0; | |
1690 | ||
1691 | err_out: | |
1692 | sunvnet_port_free_tx_bufs_common(port); | |
1693 | ||
1694 | return err; | |
1695 | } | |
1696 | ||
1697 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
67d0719f | 1698 | void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp) |
31762eaa | 1699 | { |
31762eaa AY |
1700 | struct vnet_port *port; |
1701 | unsigned long flags; | |
1702 | ||
1703 | spin_lock_irqsave(&vp->lock, flags); | |
1704 | if (!list_empty(&vp->port_list)) { | |
1705 | port = list_entry(vp->port_list.next, struct vnet_port, list); | |
1706 | napi_schedule(&port->napi); | |
1707 | } | |
1708 | spin_unlock_irqrestore(&vp->lock, flags); | |
1709 | } | |
1710 | EXPORT_SYMBOL_GPL(sunvnet_poll_controller_common); | |
1711 | #endif | |
1712 | ||
1713 | void sunvnet_port_add_txq_common(struct vnet_port *port) | |
1714 | { | |
1715 | struct vnet *vp = port->vp; | |
1716 | int n; | |
1717 | ||
1718 | n = vp->nports++; | |
1719 | n = n & (VNET_MAX_TXQS - 1); | |
1720 | port->q_index = n; | |
67d0719f AY |
1721 | netif_tx_wake_queue(netdev_get_tx_queue(VNET_PORT_TO_NET_DEVICE(port), |
1722 | port->q_index)); | |
31762eaa AY |
1723 | } |
1724 | EXPORT_SYMBOL_GPL(sunvnet_port_add_txq_common); | |
1725 | ||
1726 | void sunvnet_port_rm_txq_common(struct vnet_port *port) | |
1727 | { | |
1728 | port->vp->nports--; | |
67d0719f AY |
1729 | netif_tx_stop_queue(netdev_get_tx_queue(VNET_PORT_TO_NET_DEVICE(port), |
1730 | port->q_index)); | |
31762eaa AY |
1731 | } |
1732 | EXPORT_SYMBOL_GPL(sunvnet_port_rm_txq_common); |