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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> |
da38c564 | 18 | #include <linux/highmem.h> |
e4defc77 | 19 | #include <linux/if_vlan.h> |
4c521e42 | 20 | |
a2b78e9b DS |
21 | #if IS_ENABLED(CONFIG_IPV6) |
22 | #include <linux/icmpv6.h> | |
23 | #endif | |
24 | ||
6d0ba919 | 25 | #include <net/ip.h> |
a2b78e9b DS |
26 | #include <net/icmp.h> |
27 | #include <net/route.h> | |
28 | ||
4c521e42 DM |
29 | #include <asm/vio.h> |
30 | #include <asm/ldc.h> | |
31 | ||
32 | #include "sunvnet.h" | |
33 | ||
34 | #define DRV_MODULE_NAME "sunvnet" | |
4c521e42 DM |
35 | #define DRV_MODULE_VERSION "1.0" |
36 | #define DRV_MODULE_RELDATE "June 25, 2007" | |
37 | ||
f73d12bd | 38 | static char version[] = |
4c521e42 DM |
39 | DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; |
40 | MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); | |
41 | MODULE_DESCRIPTION("Sun LDOM virtual network driver"); | |
42 | MODULE_LICENSE("GPL"); | |
43 | MODULE_VERSION(DRV_MODULE_VERSION); | |
44 | ||
d51bffd1 SV |
45 | #define VNET_MAX_TXQS 16 |
46 | ||
adddc32d SV |
47 | /* Heuristic for the number of times to exponentially backoff and |
48 | * retry sending an LDC trigger when EAGAIN is encountered | |
49 | */ | |
50 | #define VNET_MAX_RETRIES 10 | |
51 | ||
d1015645 | 52 | static int __vnet_tx_trigger(struct vnet_port *port, u32 start); |
8e2b60cd | 53 | static void vnet_port_reset(struct vnet_port *port); |
d1015645 | 54 | |
4c521e42 DM |
55 | /* Ordered from largest major to lowest */ |
56 | static struct vio_version vnet_versions[] = { | |
6d0ba919 DS |
57 | { .major = 1, .minor = 8 }, |
58 | { .major = 1, .minor = 7 }, | |
e4defc77 | 59 | { .major = 1, .minor = 6 }, |
4c521e42 DM |
60 | { .major = 1, .minor = 0 }, |
61 | }; | |
62 | ||
63 | static inline u32 vnet_tx_dring_avail(struct vio_dring_state *dr) | |
64 | { | |
65 | return vio_dring_avail(dr, VNET_TX_RING_SIZE); | |
66 | } | |
67 | ||
68 | static int vnet_handle_unknown(struct vnet_port *port, void *arg) | |
69 | { | |
70 | struct vio_msg_tag *pkt = arg; | |
71 | ||
4d5870ec | 72 | pr_err("Received unknown msg [%02x:%02x:%04x:%08x]\n", |
4c521e42 | 73 | pkt->type, pkt->stype, pkt->stype_env, pkt->sid); |
4d5870ec | 74 | pr_err("Resetting connection\n"); |
4c521e42 DM |
75 | |
76 | ldc_disconnect(port->vio.lp); | |
77 | ||
78 | return -ECONNRESET; | |
79 | } | |
80 | ||
d6732489 DS |
81 | static int vnet_port_alloc_tx_ring(struct vnet_port *port); |
82 | ||
4c521e42 DM |
83 | static int vnet_send_attr(struct vio_driver_state *vio) |
84 | { | |
85 | struct vnet_port *port = to_vnet_port(vio); | |
86 | struct net_device *dev = port->vp->dev; | |
87 | struct vio_net_attr_info pkt; | |
e4defc77 | 88 | int framelen = ETH_FRAME_LEN; |
d6732489 DS |
89 | int i, err; |
90 | ||
91 | err = vnet_port_alloc_tx_ring(to_vnet_port(vio)); | |
92 | if (err) | |
93 | return err; | |
4c521e42 DM |
94 | |
95 | memset(&pkt, 0, sizeof(pkt)); | |
96 | pkt.tag.type = VIO_TYPE_CTRL; | |
97 | pkt.tag.stype = VIO_SUBTYPE_INFO; | |
98 | pkt.tag.stype_env = VIO_ATTR_INFO; | |
99 | pkt.tag.sid = vio_send_sid(vio); | |
e4defc77 DS |
100 | if (vio_version_before(vio, 1, 2)) |
101 | pkt.xfer_mode = VIO_DRING_MODE; | |
102 | else | |
103 | pkt.xfer_mode = VIO_NEW_DRING_MODE; | |
4c521e42 DM |
104 | pkt.addr_type = VNET_ADDR_ETHERMAC; |
105 | pkt.ack_freq = 0; | |
106 | for (i = 0; i < 6; i++) | |
107 | pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8); | |
e4defc77 DS |
108 | if (vio_version_after(vio, 1, 3)) { |
109 | if (port->rmtu) { | |
110 | port->rmtu = min(VNET_MAXPACKET, port->rmtu); | |
111 | pkt.mtu = port->rmtu; | |
112 | } else { | |
113 | port->rmtu = VNET_MAXPACKET; | |
114 | pkt.mtu = port->rmtu; | |
115 | } | |
116 | if (vio_version_after_eq(vio, 1, 6)) | |
117 | pkt.options = VIO_TX_DRING; | |
118 | } else if (vio_version_before(vio, 1, 3)) { | |
119 | pkt.mtu = framelen; | |
120 | } else { /* v1.3 */ | |
121 | pkt.mtu = framelen + VLAN_HLEN; | |
122 | } | |
123 | ||
e4defc77 | 124 | pkt.cflags = 0; |
368e36ed DS |
125 | if (vio_version_after_eq(vio, 1, 7) && port->tso) { |
126 | pkt.cflags |= VNET_LSO_IPV4_CAPAB; | |
127 | if (!port->tsolen) | |
128 | port->tsolen = VNET_MAXTSO; | |
129 | pkt.ipv4_lso_maxlen = port->tsolen; | |
130 | } | |
131 | ||
132 | pkt.plnk_updt = PHYSLINK_UPDATE_NONE; | |
4c521e42 DM |
133 | |
134 | viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] " | |
e4defc77 DS |
135 | "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] " |
136 | "cflags[0x%04x] lso_max[%u]\n", | |
4c521e42 | 137 | pkt.xfer_mode, pkt.addr_type, |
e4defc77 DS |
138 | (unsigned long long)pkt.addr, |
139 | pkt.ack_freq, pkt.plnk_updt, pkt.options, | |
140 | (unsigned long long)pkt.mtu, pkt.cflags, pkt.ipv4_lso_maxlen); | |
141 | ||
4c521e42 DM |
142 | |
143 | return vio_ldc_send(vio, &pkt, sizeof(pkt)); | |
144 | } | |
145 | ||
146 | static int handle_attr_info(struct vio_driver_state *vio, | |
147 | struct vio_net_attr_info *pkt) | |
148 | { | |
e4defc77 DS |
149 | struct vnet_port *port = to_vnet_port(vio); |
150 | u64 localmtu; | |
151 | u8 xfer_mode; | |
152 | ||
153 | viodbg(HS, "GOT NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] " | |
154 | "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] " | |
155 | " (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n", | |
4c521e42 | 156 | pkt->xfer_mode, pkt->addr_type, |
e4defc77 DS |
157 | (unsigned long long)pkt->addr, |
158 | pkt->ack_freq, pkt->plnk_updt, pkt->options, | |
159 | (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags, | |
160 | pkt->ipv4_lso_maxlen); | |
4c521e42 DM |
161 | |
162 | pkt->tag.sid = vio_send_sid(vio); | |
163 | ||
e4defc77 DS |
164 | xfer_mode = pkt->xfer_mode; |
165 | /* for version < 1.2, VIO_DRING_MODE = 0x3 and no bitmask */ | |
166 | if (vio_version_before(vio, 1, 2) && xfer_mode == VIO_DRING_MODE) | |
167 | xfer_mode = VIO_NEW_DRING_MODE; | |
168 | ||
169 | /* MTU negotiation: | |
170 | * < v1.3 - ETH_FRAME_LEN exactly | |
171 | * > v1.3 - MIN(pkt.mtu, VNET_MAXPACKET, port->rmtu) and change | |
172 | * pkt->mtu for ACK | |
173 | * = v1.3 - ETH_FRAME_LEN + VLAN_HLEN exactly | |
174 | */ | |
175 | if (vio_version_before(vio, 1, 3)) { | |
176 | localmtu = ETH_FRAME_LEN; | |
177 | } else if (vio_version_after(vio, 1, 3)) { | |
178 | localmtu = port->rmtu ? port->rmtu : VNET_MAXPACKET; | |
179 | localmtu = min(pkt->mtu, localmtu); | |
180 | pkt->mtu = localmtu; | |
181 | } else { /* v1.3 */ | |
182 | localmtu = ETH_FRAME_LEN + VLAN_HLEN; | |
183 | } | |
184 | port->rmtu = localmtu; | |
185 | ||
368e36ed DS |
186 | /* LSO negotiation */ |
187 | if (vio_version_after_eq(vio, 1, 7)) | |
188 | port->tso &= !!(pkt->cflags & VNET_LSO_IPV4_CAPAB); | |
189 | else | |
190 | port->tso = false; | |
191 | if (port->tso) { | |
192 | if (!port->tsolen) | |
193 | port->tsolen = VNET_MAXTSO; | |
194 | port->tsolen = min(port->tsolen, pkt->ipv4_lso_maxlen); | |
195 | if (port->tsolen < VNET_MINTSO) { | |
196 | port->tso = false; | |
197 | port->tsolen = 0; | |
198 | pkt->cflags &= ~VNET_LSO_IPV4_CAPAB; | |
199 | } | |
200 | pkt->ipv4_lso_maxlen = port->tsolen; | |
201 | } else { | |
202 | pkt->cflags &= ~VNET_LSO_IPV4_CAPAB; | |
203 | pkt->ipv4_lso_maxlen = 0; | |
204 | } | |
205 | ||
e4defc77 DS |
206 | /* for version >= 1.6, ACK packet mode we support */ |
207 | if (vio_version_after_eq(vio, 1, 6)) { | |
208 | pkt->xfer_mode = VIO_NEW_DRING_MODE; | |
209 | pkt->options = VIO_TX_DRING; | |
210 | } | |
211 | ||
212 | if (!(xfer_mode | VIO_NEW_DRING_MODE) || | |
4c521e42 | 213 | pkt->addr_type != VNET_ADDR_ETHERMAC || |
e4defc77 | 214 | pkt->mtu != localmtu) { |
4c521e42 DM |
215 | viodbg(HS, "SEND NET ATTR NACK\n"); |
216 | ||
217 | pkt->tag.stype = VIO_SUBTYPE_NACK; | |
218 | ||
219 | (void) vio_ldc_send(vio, pkt, sizeof(*pkt)); | |
220 | ||
221 | return -ECONNRESET; | |
222 | } else { | |
e4defc77 DS |
223 | viodbg(HS, "SEND NET ATTR ACK xmode[0x%x] atype[0x%x] " |
224 | "addr[%llx] ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] " | |
225 | "mtu[%llu] (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n", | |
226 | pkt->xfer_mode, pkt->addr_type, | |
227 | (unsigned long long)pkt->addr, | |
228 | pkt->ack_freq, pkt->plnk_updt, pkt->options, | |
229 | (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags, | |
230 | pkt->ipv4_lso_maxlen); | |
4c521e42 DM |
231 | |
232 | pkt->tag.stype = VIO_SUBTYPE_ACK; | |
233 | ||
234 | return vio_ldc_send(vio, pkt, sizeof(*pkt)); | |
235 | } | |
236 | ||
237 | } | |
238 | ||
239 | static int handle_attr_ack(struct vio_driver_state *vio, | |
240 | struct vio_net_attr_info *pkt) | |
241 | { | |
242 | viodbg(HS, "GOT NET ATTR ACK\n"); | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | static int handle_attr_nack(struct vio_driver_state *vio, | |
248 | struct vio_net_attr_info *pkt) | |
249 | { | |
250 | viodbg(HS, "GOT NET ATTR NACK\n"); | |
251 | ||
252 | return -ECONNRESET; | |
253 | } | |
254 | ||
255 | static int vnet_handle_attr(struct vio_driver_state *vio, void *arg) | |
256 | { | |
257 | struct vio_net_attr_info *pkt = arg; | |
258 | ||
259 | switch (pkt->tag.stype) { | |
260 | case VIO_SUBTYPE_INFO: | |
261 | return handle_attr_info(vio, pkt); | |
262 | ||
263 | case VIO_SUBTYPE_ACK: | |
264 | return handle_attr_ack(vio, pkt); | |
265 | ||
266 | case VIO_SUBTYPE_NACK: | |
267 | return handle_attr_nack(vio, pkt); | |
268 | ||
269 | default: | |
270 | return -ECONNRESET; | |
271 | } | |
272 | } | |
273 | ||
274 | static void vnet_handshake_complete(struct vio_driver_state *vio) | |
275 | { | |
276 | struct vio_dring_state *dr; | |
277 | ||
278 | dr = &vio->drings[VIO_DRIVER_RX_RING]; | |
279 | dr->snd_nxt = dr->rcv_nxt = 1; | |
280 | ||
281 | dr = &vio->drings[VIO_DRIVER_TX_RING]; | |
282 | dr->snd_nxt = dr->rcv_nxt = 1; | |
283 | } | |
284 | ||
285 | /* The hypervisor interface that implements copying to/from imported | |
286 | * memory from another domain requires that copies are done to 8-byte | |
287 | * aligned buffers, and that the lengths of such copies are also 8-byte | |
288 | * multiples. | |
289 | * | |
290 | * So we align skb->data to an 8-byte multiple and pad-out the data | |
291 | * area so we can round the copy length up to the next multiple of | |
292 | * 8 for the copy. | |
293 | * | |
294 | * The transmitter puts the actual start of the packet 6 bytes into | |
295 | * the buffer it sends over, so that the IP headers after the ethernet | |
296 | * header are aligned properly. These 6 bytes are not in the descriptor | |
297 | * length, they are simply implied. This offset is represented using | |
298 | * the VNET_PACKET_SKIP macro. | |
299 | */ | |
300 | static struct sk_buff *alloc_and_align_skb(struct net_device *dev, | |
301 | unsigned int len) | |
302 | { | |
303 | struct sk_buff *skb = netdev_alloc_skb(dev, len+VNET_PACKET_SKIP+8+8); | |
304 | unsigned long addr, off; | |
305 | ||
306 | if (unlikely(!skb)) | |
307 | return NULL; | |
308 | ||
309 | addr = (unsigned long) skb->data; | |
310 | off = ((addr + 7UL) & ~7UL) - addr; | |
311 | if (off) | |
312 | skb_reserve(skb, off); | |
313 | ||
314 | return skb; | |
315 | } | |
316 | ||
6d0ba919 DS |
317 | static inline void vnet_fullcsum(struct sk_buff *skb) |
318 | { | |
319 | struct iphdr *iph = ip_hdr(skb); | |
320 | int offset = skb_transport_offset(skb); | |
321 | ||
322 | if (skb->protocol != htons(ETH_P_IP)) | |
323 | return; | |
324 | if (iph->protocol != IPPROTO_TCP && | |
325 | iph->protocol != IPPROTO_UDP) | |
326 | return; | |
327 | skb->ip_summed = CHECKSUM_NONE; | |
328 | skb->csum_level = 1; | |
329 | skb->csum = 0; | |
330 | if (iph->protocol == IPPROTO_TCP) { | |
331 | struct tcphdr *ptcp = tcp_hdr(skb); | |
332 | ||
333 | ptcp->check = 0; | |
334 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
335 | ptcp->check = csum_tcpudp_magic(iph->saddr, iph->daddr, | |
336 | skb->len - offset, IPPROTO_TCP, | |
337 | skb->csum); | |
338 | } else if (iph->protocol == IPPROTO_UDP) { | |
339 | struct udphdr *pudp = udp_hdr(skb); | |
340 | ||
341 | pudp->check = 0; | |
342 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
343 | pudp->check = csum_tcpudp_magic(iph->saddr, iph->daddr, | |
344 | skb->len - offset, IPPROTO_UDP, | |
345 | skb->csum); | |
346 | } | |
347 | } | |
348 | ||
349 | static int vnet_rx_one(struct vnet_port *port, struct vio_net_desc *desc) | |
4c521e42 DM |
350 | { |
351 | struct net_device *dev = port->vp->dev; | |
6d0ba919 | 352 | unsigned int len = desc->size; |
4c521e42 DM |
353 | unsigned int copy_len; |
354 | struct sk_buff *skb; | |
86cfeab6 | 355 | int maxlen; |
4c521e42 DM |
356 | int err; |
357 | ||
358 | err = -EMSGSIZE; | |
86cfeab6 DS |
359 | if (port->tso && port->tsolen > port->rmtu) |
360 | maxlen = port->tsolen; | |
361 | else | |
362 | maxlen = port->rmtu; | |
363 | if (unlikely(len < ETH_ZLEN || len > maxlen)) { | |
4c521e42 DM |
364 | dev->stats.rx_length_errors++; |
365 | goto out_dropped; | |
366 | } | |
367 | ||
368 | skb = alloc_and_align_skb(dev, len); | |
369 | err = -ENOMEM; | |
370 | if (unlikely(!skb)) { | |
371 | dev->stats.rx_missed_errors++; | |
372 | goto out_dropped; | |
373 | } | |
374 | ||
375 | copy_len = (len + VNET_PACKET_SKIP + 7U) & ~7U; | |
376 | skb_put(skb, copy_len); | |
377 | err = ldc_copy(port->vio.lp, LDC_COPY_IN, | |
378 | skb->data, copy_len, 0, | |
6d0ba919 | 379 | desc->cookies, desc->ncookies); |
4c521e42 DM |
380 | if (unlikely(err < 0)) { |
381 | dev->stats.rx_frame_errors++; | |
382 | goto out_free_skb; | |
383 | } | |
384 | ||
385 | skb_pull(skb, VNET_PACKET_SKIP); | |
386 | skb_trim(skb, len); | |
387 | skb->protocol = eth_type_trans(skb, dev); | |
388 | ||
6d0ba919 DS |
389 | if (vio_version_after_eq(&port->vio, 1, 8)) { |
390 | struct vio_net_dext *dext = vio_net_ext(desc); | |
391 | ||
392 | if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM) { | |
393 | if (skb->protocol == ETH_P_IP) { | |
394 | struct iphdr *iph = (struct iphdr *)skb->data; | |
395 | ||
396 | iph->check = 0; | |
397 | ip_send_check(iph); | |
398 | } | |
399 | } | |
400 | if ((dext->flags & VNET_PKT_HCK_FULLCKSUM) && | |
401 | skb->ip_summed == CHECKSUM_NONE) | |
402 | vnet_fullcsum(skb); | |
403 | if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM_OK) { | |
404 | skb->ip_summed = CHECKSUM_PARTIAL; | |
405 | skb->csum_level = 0; | |
406 | if (dext->flags & VNET_PKT_HCK_FULLCKSUM_OK) | |
407 | skb->csum_level = 1; | |
408 | } | |
409 | } | |
410 | ||
1b6b0a47 DS |
411 | skb->ip_summed = port->switch_port ? CHECKSUM_NONE : CHECKSUM_PARTIAL; |
412 | ||
4c521e42 DM |
413 | dev->stats.rx_packets++; |
414 | dev->stats.rx_bytes += len; | |
69088822 | 415 | napi_gro_receive(&port->napi, skb); |
4c521e42 DM |
416 | return 0; |
417 | ||
418 | out_free_skb: | |
419 | kfree_skb(skb); | |
420 | ||
421 | out_dropped: | |
422 | dev->stats.rx_dropped++; | |
423 | return err; | |
424 | } | |
425 | ||
426 | static int vnet_send_ack(struct vnet_port *port, struct vio_dring_state *dr, | |
427 | u32 start, u32 end, u8 vio_dring_state) | |
428 | { | |
429 | struct vio_dring_data hdr = { | |
430 | .tag = { | |
431 | .type = VIO_TYPE_DATA, | |
432 | .stype = VIO_SUBTYPE_ACK, | |
433 | .stype_env = VIO_DRING_DATA, | |
434 | .sid = vio_send_sid(&port->vio), | |
435 | }, | |
436 | .dring_ident = dr->ident, | |
437 | .start_idx = start, | |
438 | .end_idx = end, | |
439 | .state = vio_dring_state, | |
440 | }; | |
441 | int err, delay; | |
adddc32d | 442 | int retries = 0; |
4c521e42 DM |
443 | |
444 | hdr.seq = dr->snd_nxt; | |
445 | delay = 1; | |
446 | do { | |
447 | err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr)); | |
448 | if (err > 0) { | |
449 | dr->snd_nxt++; | |
450 | break; | |
451 | } | |
452 | udelay(delay); | |
453 | if ((delay <<= 1) > 128) | |
454 | delay = 128; | |
adddc32d SV |
455 | if (retries++ > VNET_MAX_RETRIES) { |
456 | pr_info("ECONNRESET %x:%x:%x:%x:%x:%x\n", | |
457 | port->raddr[0], port->raddr[1], | |
458 | port->raddr[2], port->raddr[3], | |
459 | port->raddr[4], port->raddr[5]); | |
d1015645 | 460 | break; |
adddc32d | 461 | } |
4c521e42 DM |
462 | } while (err == -EAGAIN); |
463 | ||
d1015645 SV |
464 | if (err <= 0 && vio_dring_state == VIO_DRING_STOPPED) { |
465 | port->stop_rx_idx = end; | |
466 | port->stop_rx = true; | |
467 | } else { | |
468 | port->stop_rx_idx = 0; | |
469 | port->stop_rx = false; | |
470 | } | |
471 | ||
4c521e42 DM |
472 | return err; |
473 | } | |
474 | ||
4c521e42 DM |
475 | static struct vio_net_desc *get_rx_desc(struct vnet_port *port, |
476 | struct vio_dring_state *dr, | |
477 | u32 index) | |
478 | { | |
479 | struct vio_net_desc *desc = port->vio.desc_buf; | |
480 | int err; | |
481 | ||
482 | err = ldc_get_dring_entry(port->vio.lp, desc, dr->entry_size, | |
483 | (index * dr->entry_size), | |
484 | dr->cookies, dr->ncookies); | |
485 | if (err < 0) | |
486 | return ERR_PTR(err); | |
487 | ||
488 | return desc; | |
489 | } | |
490 | ||
491 | static int put_rx_desc(struct vnet_port *port, | |
492 | struct vio_dring_state *dr, | |
493 | struct vio_net_desc *desc, | |
494 | u32 index) | |
495 | { | |
496 | int err; | |
497 | ||
498 | err = ldc_put_dring_entry(port->vio.lp, desc, dr->entry_size, | |
499 | (index * dr->entry_size), | |
500 | dr->cookies, dr->ncookies); | |
501 | if (err < 0) | |
502 | return err; | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
507 | static int vnet_walk_rx_one(struct vnet_port *port, | |
508 | struct vio_dring_state *dr, | |
509 | u32 index, int *needs_ack) | |
510 | { | |
511 | struct vio_net_desc *desc = get_rx_desc(port, dr, index); | |
512 | struct vio_driver_state *vio = &port->vio; | |
513 | int err; | |
514 | ||
69088822 | 515 | BUG_ON(desc == NULL); |
4c521e42 DM |
516 | if (IS_ERR(desc)) |
517 | return PTR_ERR(desc); | |
518 | ||
78dcff7b DS |
519 | if (desc->hdr.state != VIO_DESC_READY) |
520 | return 1; | |
521 | ||
b4468cc6 | 522 | dma_rmb(); |
78dcff7b | 523 | |
3f4528d6 | 524 | viodbg(DATA, "vio_walk_rx_one desc[%02x:%02x:%08x:%08x:%llx:%llx]\n", |
4c521e42 DM |
525 | desc->hdr.state, desc->hdr.ack, |
526 | desc->size, desc->ncookies, | |
527 | desc->cookies[0].cookie_addr, | |
528 | desc->cookies[0].cookie_size); | |
529 | ||
6d0ba919 | 530 | err = vnet_rx_one(port, desc); |
4c521e42 DM |
531 | if (err == -ECONNRESET) |
532 | return err; | |
533 | desc->hdr.state = VIO_DESC_DONE; | |
534 | err = put_rx_desc(port, dr, desc, index); | |
535 | if (err < 0) | |
536 | return err; | |
537 | *needs_ack = desc->hdr.ack; | |
538 | return 0; | |
539 | } | |
540 | ||
541 | static int vnet_walk_rx(struct vnet_port *port, struct vio_dring_state *dr, | |
69088822 | 542 | u32 start, u32 end, int *npkts, int budget) |
4c521e42 DM |
543 | { |
544 | struct vio_driver_state *vio = &port->vio; | |
545 | int ack_start = -1, ack_end = -1; | |
69088822 | 546 | bool send_ack = true; |
4c521e42 | 547 | |
fe47c3c2 DE |
548 | end = (end == (u32) -1) ? vio_dring_prev(dr, start) |
549 | : vio_dring_next(dr, end); | |
4c521e42 DM |
550 | |
551 | viodbg(DATA, "vnet_walk_rx start[%08x] end[%08x]\n", start, end); | |
552 | ||
553 | while (start != end) { | |
554 | int ack = 0, err = vnet_walk_rx_one(port, dr, start, &ack); | |
555 | if (err == -ECONNRESET) | |
556 | return err; | |
557 | if (err != 0) | |
558 | break; | |
69088822 | 559 | (*npkts)++; |
4c521e42 DM |
560 | if (ack_start == -1) |
561 | ack_start = start; | |
562 | ack_end = start; | |
fe47c3c2 | 563 | start = vio_dring_next(dr, start); |
4c521e42 DM |
564 | if (ack && start != end) { |
565 | err = vnet_send_ack(port, dr, ack_start, ack_end, | |
566 | VIO_DRING_ACTIVE); | |
567 | if (err == -ECONNRESET) | |
568 | return err; | |
569 | ack_start = -1; | |
570 | } | |
69088822 SV |
571 | if ((*npkts) >= budget) { |
572 | send_ack = false; | |
573 | break; | |
574 | } | |
4c521e42 DM |
575 | } |
576 | if (unlikely(ack_start == -1)) | |
fe47c3c2 | 577 | ack_start = ack_end = vio_dring_prev(dr, start); |
69088822 SV |
578 | if (send_ack) { |
579 | port->napi_resume = false; | |
580 | return vnet_send_ack(port, dr, ack_start, ack_end, | |
581 | VIO_DRING_STOPPED); | |
582 | } else { | |
583 | port->napi_resume = true; | |
584 | port->napi_stop_idx = ack_end; | |
585 | return 1; | |
586 | } | |
4c521e42 DM |
587 | } |
588 | ||
69088822 SV |
589 | static int vnet_rx(struct vnet_port *port, void *msgbuf, int *npkts, |
590 | int budget) | |
4c521e42 DM |
591 | { |
592 | struct vio_dring_data *pkt = msgbuf; | |
593 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_RX_RING]; | |
594 | struct vio_driver_state *vio = &port->vio; | |
595 | ||
3f4528d6 | 596 | viodbg(DATA, "vnet_rx stype_env[%04x] seq[%016llx] rcv_nxt[%016llx]\n", |
4c521e42 DM |
597 | pkt->tag.stype_env, pkt->seq, dr->rcv_nxt); |
598 | ||
599 | if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA)) | |
600 | return 0; | |
601 | if (unlikely(pkt->seq != dr->rcv_nxt)) { | |
4d5870ec JP |
602 | pr_err("RX out of sequence seq[0x%llx] rcv_nxt[0x%llx]\n", |
603 | pkt->seq, dr->rcv_nxt); | |
4c521e42 DM |
604 | return 0; |
605 | } | |
606 | ||
69088822 SV |
607 | if (!port->napi_resume) |
608 | dr->rcv_nxt++; | |
4c521e42 DM |
609 | |
610 | /* XXX Validate pkt->start_idx and pkt->end_idx XXX */ | |
611 | ||
69088822 SV |
612 | return vnet_walk_rx(port, dr, pkt->start_idx, pkt->end_idx, |
613 | npkts, budget); | |
4c521e42 DM |
614 | } |
615 | ||
616 | static int idx_is_pending(struct vio_dring_state *dr, u32 end) | |
617 | { | |
618 | u32 idx = dr->cons; | |
619 | int found = 0; | |
620 | ||
621 | while (idx != dr->prod) { | |
622 | if (idx == end) { | |
623 | found = 1; | |
624 | break; | |
625 | } | |
fe47c3c2 | 626 | idx = vio_dring_next(dr, idx); |
4c521e42 DM |
627 | } |
628 | return found; | |
629 | } | |
630 | ||
631 | static int vnet_ack(struct vnet_port *port, void *msgbuf) | |
632 | { | |
633 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
634 | struct vio_dring_data *pkt = msgbuf; | |
635 | struct net_device *dev; | |
636 | struct vnet *vp; | |
637 | u32 end; | |
d1015645 | 638 | struct vio_net_desc *desc; |
d51bffd1 SV |
639 | struct netdev_queue *txq; |
640 | ||
4c521e42 DM |
641 | if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA)) |
642 | return 0; | |
643 | ||
644 | end = pkt->end_idx; | |
69088822 SV |
645 | vp = port->vp; |
646 | dev = vp->dev; | |
b0cffed5 SV |
647 | netif_tx_lock(dev); |
648 | if (unlikely(!idx_is_pending(dr, end))) { | |
649 | netif_tx_unlock(dev); | |
650 | return 0; | |
651 | } | |
652 | ||
d1015645 SV |
653 | /* sync for race conditions with vnet_start_xmit() and tell xmit it |
654 | * is time to send a trigger. | |
655 | */ | |
fe47c3c2 | 656 | dr->cons = vio_dring_next(dr, end); |
d1015645 | 657 | desc = vio_dring_entry(dr, dr->cons); |
777362d7 | 658 | if (desc->hdr.state == VIO_DESC_READY && !port->start_cons) { |
d1015645 SV |
659 | /* vnet_start_xmit() just populated this dring but missed |
660 | * sending the "start" LDC message to the consumer. | |
661 | * Send a "start" trigger on its behalf. | |
662 | */ | |
663 | if (__vnet_tx_trigger(port, dr->cons) > 0) | |
664 | port->start_cons = false; | |
665 | else | |
666 | port->start_cons = true; | |
667 | } else { | |
668 | port->start_cons = true; | |
669 | } | |
69088822 | 670 | netif_tx_unlock(dev); |
d1015645 | 671 | |
d51bffd1 SV |
672 | txq = netdev_get_tx_queue(dev, port->q_index); |
673 | if (unlikely(netif_tx_queue_stopped(txq) && | |
4c521e42 DM |
674 | vnet_tx_dring_avail(dr) >= VNET_TX_WAKEUP_THRESH(dr))) |
675 | return 1; | |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
680 | static int vnet_nack(struct vnet_port *port, void *msgbuf) | |
681 | { | |
682 | /* XXX just reset or similar XXX */ | |
683 | return 0; | |
684 | } | |
685 | ||
028ebff2 DM |
686 | static int handle_mcast(struct vnet_port *port, void *msgbuf) |
687 | { | |
688 | struct vio_net_mcast_info *pkt = msgbuf; | |
689 | ||
690 | if (pkt->tag.stype != VIO_SUBTYPE_ACK) | |
4d5870ec | 691 | pr_err("%s: Got unexpected MCAST reply [%02x:%02x:%04x:%08x]\n", |
028ebff2 DM |
692 | port->vp->dev->name, |
693 | pkt->tag.type, | |
694 | pkt->tag.stype, | |
695 | pkt->tag.stype_env, | |
696 | pkt->tag.sid); | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
d51bffd1 SV |
701 | /* Got back a STOPPED LDC message on port. If the queue is stopped, |
702 | * wake it up so that we'll send out another START message at the | |
703 | * next TX. | |
704 | */ | |
705 | static void maybe_tx_wakeup(struct vnet_port *port) | |
4c521e42 | 706 | { |
d51bffd1 | 707 | struct netdev_queue *txq; |
4c521e42 | 708 | |
d51bffd1 SV |
709 | txq = netdev_get_tx_queue(port->vp->dev, port->q_index); |
710 | __netif_tx_lock(txq, smp_processor_id()); | |
711 | if (likely(netif_tx_queue_stopped(txq))) { | |
712 | struct vio_dring_state *dr; | |
713 | ||
714 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
6c3ce8a3 | 715 | netif_tx_wake_queue(txq); |
4c521e42 | 716 | } |
d51bffd1 | 717 | __netif_tx_unlock(txq); |
4c521e42 DM |
718 | } |
719 | ||
69088822 SV |
720 | static inline bool port_is_up(struct vnet_port *vnet) |
721 | { | |
722 | struct vio_driver_state *vio = &vnet->vio; | |
723 | ||
724 | return !!(vio->hs_state & VIO_HS_COMPLETE); | |
725 | } | |
726 | ||
727 | static int vnet_event_napi(struct vnet_port *port, int budget) | |
4c521e42 | 728 | { |
4c521e42 | 729 | struct vio_driver_state *vio = &port->vio; |
4c521e42 | 730 | int tx_wakeup, err; |
69088822 SV |
731 | int npkts = 0; |
732 | int event = (port->rx_event & LDC_EVENT_RESET); | |
4c521e42 | 733 | |
69088822 | 734 | ldc_ctrl: |
4c521e42 DM |
735 | if (unlikely(event == LDC_EVENT_RESET || |
736 | event == LDC_EVENT_UP)) { | |
737 | vio_link_state_change(vio, event); | |
4c521e42 | 738 | |
e4defc77 | 739 | if (event == LDC_EVENT_RESET) { |
8e2b60cd | 740 | vnet_port_reset(port); |
d762acdb | 741 | vio_port_up(vio); |
e4defc77 | 742 | } |
69088822 SV |
743 | port->rx_event = 0; |
744 | return 0; | |
4c521e42 | 745 | } |
69088822 SV |
746 | /* We may have multiple LDC events in rx_event. Unroll send_events() */ |
747 | event = (port->rx_event & LDC_EVENT_UP); | |
748 | port->rx_event &= ~(LDC_EVENT_RESET|LDC_EVENT_UP); | |
749 | if (event == LDC_EVENT_UP) | |
750 | goto ldc_ctrl; | |
751 | event = port->rx_event; | |
752 | if (!(event & LDC_EVENT_DATA_READY)) | |
753 | return 0; | |
4c521e42 | 754 | |
69088822 SV |
755 | /* we dont expect any other bits than RESET, UP, DATA_READY */ |
756 | BUG_ON(event != LDC_EVENT_DATA_READY); | |
4c521e42 DM |
757 | |
758 | tx_wakeup = err = 0; | |
759 | while (1) { | |
760 | union { | |
761 | struct vio_msg_tag tag; | |
762 | u64 raw[8]; | |
763 | } msgbuf; | |
764 | ||
69088822 SV |
765 | if (port->napi_resume) { |
766 | struct vio_dring_data *pkt = | |
767 | (struct vio_dring_data *)&msgbuf; | |
768 | struct vio_dring_state *dr = | |
769 | &port->vio.drings[VIO_DRIVER_RX_RING]; | |
770 | ||
771 | pkt->tag.type = VIO_TYPE_DATA; | |
772 | pkt->tag.stype = VIO_SUBTYPE_INFO; | |
773 | pkt->tag.stype_env = VIO_DRING_DATA; | |
774 | pkt->seq = dr->rcv_nxt; | |
fe47c3c2 | 775 | pkt->start_idx = vio_dring_next(dr, port->napi_stop_idx); |
69088822 SV |
776 | pkt->end_idx = -1; |
777 | goto napi_resume; | |
778 | } | |
4c521e42 DM |
779 | err = ldc_read(vio->lp, &msgbuf, sizeof(msgbuf)); |
780 | if (unlikely(err < 0)) { | |
781 | if (err == -ECONNRESET) | |
782 | vio_conn_reset(vio); | |
783 | break; | |
784 | } | |
785 | if (err == 0) | |
786 | break; | |
787 | viodbg(DATA, "TAG [%02x:%02x:%04x:%08x]\n", | |
788 | msgbuf.tag.type, | |
789 | msgbuf.tag.stype, | |
790 | msgbuf.tag.stype_env, | |
791 | msgbuf.tag.sid); | |
792 | err = vio_validate_sid(vio, &msgbuf.tag); | |
793 | if (err < 0) | |
794 | break; | |
69088822 | 795 | napi_resume: |
4c521e42 DM |
796 | if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) { |
797 | if (msgbuf.tag.stype == VIO_SUBTYPE_INFO) { | |
69088822 SV |
798 | if (!port_is_up(port)) { |
799 | /* failures like handshake_failure() | |
800 | * may have cleaned up dring, but | |
801 | * NAPI polling may bring us here. | |
802 | */ | |
803 | err = -ECONNRESET; | |
804 | break; | |
805 | } | |
806 | err = vnet_rx(port, &msgbuf, &npkts, budget); | |
807 | if (npkts >= budget) | |
808 | break; | |
8c4ee3e7 SV |
809 | if (npkts == 0) |
810 | break; | |
4c521e42 DM |
811 | } else if (msgbuf.tag.stype == VIO_SUBTYPE_ACK) { |
812 | err = vnet_ack(port, &msgbuf); | |
813 | if (err > 0) | |
814 | tx_wakeup |= err; | |
815 | } else if (msgbuf.tag.stype == VIO_SUBTYPE_NACK) { | |
816 | err = vnet_nack(port, &msgbuf); | |
817 | } | |
818 | } else if (msgbuf.tag.type == VIO_TYPE_CTRL) { | |
028ebff2 DM |
819 | if (msgbuf.tag.stype_env == VNET_MCAST_INFO) |
820 | err = handle_mcast(port, &msgbuf); | |
821 | else | |
822 | err = vio_control_pkt_engine(vio, &msgbuf); | |
4c521e42 DM |
823 | if (err) |
824 | break; | |
825 | } else { | |
826 | err = vnet_handle_unknown(port, &msgbuf); | |
827 | } | |
828 | if (err == -ECONNRESET) | |
829 | break; | |
830 | } | |
4c521e42 | 831 | if (unlikely(tx_wakeup && err != -ECONNRESET)) |
d51bffd1 | 832 | maybe_tx_wakeup(port); |
69088822 SV |
833 | return npkts; |
834 | } | |
835 | ||
836 | static int vnet_poll(struct napi_struct *napi, int budget) | |
837 | { | |
838 | struct vnet_port *port = container_of(napi, struct vnet_port, napi); | |
839 | struct vio_driver_state *vio = &port->vio; | |
840 | int processed = vnet_event_napi(port, budget); | |
841 | ||
842 | if (processed < budget) { | |
843 | napi_complete(napi); | |
7bd68bfd | 844 | port->rx_event &= ~LDC_EVENT_DATA_READY; |
69088822 SV |
845 | vio_set_intr(vio->vdev->rx_ino, HV_INTR_ENABLED); |
846 | } | |
847 | return processed; | |
848 | } | |
849 | ||
850 | static void vnet_event(void *arg, int event) | |
851 | { | |
852 | struct vnet_port *port = arg; | |
853 | struct vio_driver_state *vio = &port->vio; | |
854 | ||
855 | port->rx_event |= event; | |
856 | vio_set_intr(vio->vdev->rx_ino, HV_INTR_DISABLED); | |
857 | napi_schedule(&port->napi); | |
1d311ad2 | 858 | |
4c521e42 DM |
859 | } |
860 | ||
d1015645 | 861 | static int __vnet_tx_trigger(struct vnet_port *port, u32 start) |
4c521e42 DM |
862 | { |
863 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
864 | struct vio_dring_data hdr = { | |
865 | .tag = { | |
866 | .type = VIO_TYPE_DATA, | |
867 | .stype = VIO_SUBTYPE_INFO, | |
868 | .stype_env = VIO_DRING_DATA, | |
869 | .sid = vio_send_sid(&port->vio), | |
870 | }, | |
871 | .dring_ident = dr->ident, | |
d1015645 | 872 | .start_idx = start, |
4c521e42 DM |
873 | .end_idx = (u32) -1, |
874 | }; | |
875 | int err, delay; | |
adddc32d | 876 | int retries = 0; |
4c521e42 | 877 | |
d1015645 SV |
878 | if (port->stop_rx) { |
879 | err = vnet_send_ack(port, | |
880 | &port->vio.drings[VIO_DRIVER_RX_RING], | |
881 | port->stop_rx_idx, -1, | |
882 | VIO_DRING_STOPPED); | |
883 | if (err <= 0) | |
884 | return err; | |
885 | } | |
886 | ||
4c521e42 DM |
887 | hdr.seq = dr->snd_nxt; |
888 | delay = 1; | |
889 | do { | |
890 | err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr)); | |
891 | if (err > 0) { | |
892 | dr->snd_nxt++; | |
893 | break; | |
894 | } | |
895 | udelay(delay); | |
896 | if ((delay <<= 1) > 128) | |
897 | delay = 128; | |
adddc32d SV |
898 | if (retries++ > VNET_MAX_RETRIES) |
899 | break; | |
4c521e42 DM |
900 | } while (err == -EAGAIN); |
901 | ||
902 | return err; | |
903 | } | |
904 | ||
905 | struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb) | |
906 | { | |
907 | unsigned int hash = vnet_hashfn(skb->data); | |
908 | struct hlist_head *hp = &vp->port_hash[hash]; | |
4c521e42 DM |
909 | struct vnet_port *port; |
910 | ||
2a968dd8 | 911 | hlist_for_each_entry_rcu(port, hp, hash) { |
8266f5fc DS |
912 | if (!port_is_up(port)) |
913 | continue; | |
2e42e474 | 914 | if (ether_addr_equal(port->raddr, skb->data)) |
4c521e42 DM |
915 | return port; |
916 | } | |
2a968dd8 | 917 | list_for_each_entry_rcu(port, &vp->port_list, list) { |
8266f5fc DS |
918 | if (!port->switch_port) |
919 | continue; | |
920 | if (!port_is_up(port)) | |
921 | continue; | |
922 | return port; | |
923 | } | |
924 | return NULL; | |
4c521e42 DM |
925 | } |
926 | ||
8e845f4c DS |
927 | static struct sk_buff *vnet_clean_tx_ring(struct vnet_port *port, |
928 | unsigned *pending) | |
929 | { | |
930 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
931 | struct sk_buff *skb = NULL; | |
932 | int i, txi; | |
933 | ||
934 | *pending = 0; | |
935 | ||
8e2b60cd | 936 | txi = dr->prod; |
8e845f4c DS |
937 | for (i = 0; i < VNET_TX_RING_SIZE; ++i) { |
938 | struct vio_net_desc *d; | |
939 | ||
8e2b60cd DS |
940 | --txi; |
941 | if (txi < 0) | |
942 | txi = VNET_TX_RING_SIZE-1; | |
8e845f4c | 943 | |
8e2b60cd | 944 | d = vio_dring_entry(dr, txi); |
8e845f4c | 945 | |
8e2b60cd | 946 | if (d->hdr.state == VIO_DESC_READY) { |
8e845f4c | 947 | (*pending)++; |
8e2b60cd | 948 | continue; |
8e845f4c | 949 | } |
8e2b60cd DS |
950 | if (port->tx_bufs[txi].skb) { |
951 | if (d->hdr.state != VIO_DESC_DONE) | |
952 | pr_notice("invalid ring buffer state %d\n", | |
953 | d->hdr.state); | |
954 | BUG_ON(port->tx_bufs[txi].skb->next); | |
955 | ||
956 | port->tx_bufs[txi].skb->next = skb; | |
957 | skb = port->tx_bufs[txi].skb; | |
958 | port->tx_bufs[txi].skb = NULL; | |
959 | ||
960 | ldc_unmap(port->vio.lp, | |
961 | port->tx_bufs[txi].cookies, | |
962 | port->tx_bufs[txi].ncookies); | |
963 | } else if (d->hdr.state == VIO_DESC_FREE) | |
964 | break; | |
965 | d->hdr.state = VIO_DESC_FREE; | |
8e845f4c DS |
966 | } |
967 | return skb; | |
968 | } | |
969 | ||
970 | static inline void vnet_free_skbs(struct sk_buff *skb) | |
971 | { | |
972 | struct sk_buff *next; | |
973 | ||
974 | while (skb) { | |
975 | next = skb->next; | |
976 | skb->next = NULL; | |
977 | dev_kfree_skb(skb); | |
978 | skb = next; | |
979 | } | |
980 | } | |
981 | ||
982 | static void vnet_clean_timer_expire(unsigned long port0) | |
983 | { | |
984 | struct vnet_port *port = (struct vnet_port *)port0; | |
985 | struct sk_buff *freeskbs; | |
986 | unsigned pending; | |
8e845f4c | 987 | |
13b13dd9 | 988 | netif_tx_lock(port->vp->dev); |
8e845f4c | 989 | freeskbs = vnet_clean_tx_ring(port, &pending); |
13b13dd9 | 990 | netif_tx_unlock(port->vp->dev); |
8e845f4c DS |
991 | |
992 | vnet_free_skbs(freeskbs); | |
993 | ||
994 | if (pending) | |
995 | (void)mod_timer(&port->clean_timer, | |
996 | jiffies + VNET_CLEAN_TIMEOUT); | |
997 | else | |
998 | del_timer(&port->clean_timer); | |
999 | } | |
1000 | ||
da38c564 DS |
1001 | static inline int vnet_skb_map(struct ldc_channel *lp, struct sk_buff *skb, |
1002 | struct ldc_trans_cookie *cookies, int ncookies, | |
1003 | unsigned int map_perm) | |
1004 | { | |
1005 | int i, nc, err, blen; | |
1006 | ||
1007 | /* header */ | |
1008 | blen = skb_headlen(skb); | |
1009 | if (blen < ETH_ZLEN) | |
1010 | blen = ETH_ZLEN; | |
1011 | blen += VNET_PACKET_SKIP; | |
1012 | blen += 8 - (blen & 7); | |
1013 | ||
1014 | err = ldc_map_single(lp, skb->data-VNET_PACKET_SKIP, blen, cookies, | |
1015 | ncookies, map_perm); | |
1016 | if (err < 0) | |
1017 | return err; | |
1018 | nc = err; | |
1019 | ||
1020 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1021 | skb_frag_t *f = &skb_shinfo(skb)->frags[i]; | |
1022 | u8 *vaddr; | |
1023 | ||
1024 | if (nc < ncookies) { | |
1025 | vaddr = kmap_atomic(skb_frag_page(f)); | |
1026 | blen = skb_frag_size(f); | |
1027 | blen += 8 - (blen & 7); | |
1028 | err = ldc_map_single(lp, vaddr + f->page_offset, | |
1029 | blen, cookies + nc, ncookies - nc, | |
1030 | map_perm); | |
1031 | kunmap_atomic(vaddr); | |
1032 | } else { | |
1033 | err = -EMSGSIZE; | |
1034 | } | |
1035 | ||
1036 | if (err < 0) { | |
1037 | ldc_unmap(lp, cookies, nc); | |
1038 | return err; | |
1039 | } | |
1040 | nc += err; | |
1041 | } | |
1042 | return nc; | |
1043 | } | |
1044 | ||
1045 | static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, int ncookies) | |
8e845f4c DS |
1046 | { |
1047 | struct sk_buff *nskb; | |
da38c564 | 1048 | int i, len, pad, docopy; |
8e845f4c DS |
1049 | |
1050 | len = skb->len; | |
1051 | pad = 0; | |
1052 | if (len < ETH_ZLEN) { | |
1053 | pad += ETH_ZLEN - skb->len; | |
1054 | len += pad; | |
1055 | } | |
1056 | len += VNET_PACKET_SKIP; | |
1057 | pad += 8 - (len & 7); | |
8e845f4c | 1058 | |
da38c564 DS |
1059 | /* make sure we have enough cookies and alignment in every frag */ |
1060 | docopy = skb_shinfo(skb)->nr_frags >= ncookies; | |
1061 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1062 | skb_frag_t *f = &skb_shinfo(skb)->frags[i]; | |
1063 | ||
1064 | docopy |= f->page_offset & 7; | |
1065 | } | |
8e845f4c DS |
1066 | if (((unsigned long)skb->data & 7) != VNET_PACKET_SKIP || |
1067 | skb_tailroom(skb) < pad || | |
da38c564 | 1068 | skb_headroom(skb) < VNET_PACKET_SKIP || docopy) { |
1b6b0a47 DS |
1069 | int start = 0, offset; |
1070 | __wsum csum; | |
6d0ba919 | 1071 | |
da38c564 DS |
1072 | len = skb->len > ETH_ZLEN ? skb->len : ETH_ZLEN; |
1073 | nskb = alloc_and_align_skb(skb->dev, len); | |
1074 | if (nskb == NULL) { | |
1075 | dev_kfree_skb(skb); | |
1076 | return NULL; | |
1077 | } | |
8e845f4c | 1078 | skb_reserve(nskb, VNET_PACKET_SKIP); |
6d0ba919 DS |
1079 | |
1080 | nskb->protocol = skb->protocol; | |
1081 | offset = skb_mac_header(skb) - skb->data; | |
1082 | skb_set_mac_header(nskb, offset); | |
1083 | offset = skb_network_header(skb) - skb->data; | |
1084 | skb_set_network_header(nskb, offset); | |
1085 | offset = skb_transport_header(skb) - skb->data; | |
1086 | skb_set_transport_header(nskb, offset); | |
1087 | ||
1b6b0a47 | 1088 | offset = 0; |
6d0ba919 DS |
1089 | nskb->csum_offset = skb->csum_offset; |
1090 | nskb->ip_summed = skb->ip_summed; | |
1091 | ||
1b6b0a47 DS |
1092 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
1093 | start = skb_checksum_start_offset(skb); | |
1094 | if (start) { | |
1095 | struct iphdr *iph = ip_hdr(nskb); | |
1096 | int offset = start + nskb->csum_offset; | |
1097 | ||
1098 | if (skb_copy_bits(skb, 0, nskb->data, start)) { | |
1099 | dev_kfree_skb(nskb); | |
1100 | dev_kfree_skb(skb); | |
1101 | return NULL; | |
1102 | } | |
1103 | *(__sum16 *)(skb->data + offset) = 0; | |
1104 | csum = skb_copy_and_csum_bits(skb, start, | |
1105 | nskb->data + start, | |
1106 | skb->len - start, 0); | |
1107 | if (iph->protocol == IPPROTO_TCP || | |
1108 | iph->protocol == IPPROTO_UDP) { | |
1109 | csum = csum_tcpudp_magic(iph->saddr, iph->daddr, | |
1110 | skb->len - start, | |
1111 | iph->protocol, csum); | |
1112 | } | |
1113 | *(__sum16 *)(nskb->data + offset) = csum; | |
1114 | ||
1115 | nskb->ip_summed = CHECKSUM_NONE; | |
1116 | } else if (skb_copy_bits(skb, 0, nskb->data, skb->len)) { | |
8e845f4c DS |
1117 | dev_kfree_skb(nskb); |
1118 | dev_kfree_skb(skb); | |
1119 | return NULL; | |
1120 | } | |
1121 | (void)skb_put(nskb, skb->len); | |
9a72dd4d DS |
1122 | if (skb_is_gso(skb)) { |
1123 | skb_shinfo(nskb)->gso_size = skb_shinfo(skb)->gso_size; | |
1124 | skb_shinfo(nskb)->gso_type = skb_shinfo(skb)->gso_type; | |
1125 | } | |
44ba582b | 1126 | nskb->queue_mapping = skb->queue_mapping; |
8e845f4c DS |
1127 | dev_kfree_skb(skb); |
1128 | skb = nskb; | |
1129 | } | |
8e845f4c DS |
1130 | return skb; |
1131 | } | |
1132 | ||
d51bffd1 SV |
1133 | static u16 |
1134 | vnet_select_queue(struct net_device *dev, struct sk_buff *skb, | |
1135 | void *accel_priv, select_queue_fallback_t fallback) | |
1136 | { | |
1137 | struct vnet *vp = netdev_priv(dev); | |
1138 | struct vnet_port *port = __tx_port_find(vp, skb); | |
1139 | ||
c647cc3f DS |
1140 | if (port == NULL) |
1141 | return 0; | |
d51bffd1 SV |
1142 | return port->q_index; |
1143 | } | |
1144 | ||
9a72dd4d DS |
1145 | static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev); |
1146 | ||
1147 | static int vnet_handle_offloads(struct vnet_port *port, struct sk_buff *skb) | |
1148 | { | |
1149 | struct net_device *dev = port->vp->dev; | |
1150 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
1151 | struct sk_buff *segs; | |
368e36ed | 1152 | int maclen, datalen; |
9a72dd4d | 1153 | int status; |
368e36ed DS |
1154 | int gso_size, gso_type, gso_segs; |
1155 | int hlen = skb_transport_header(skb) - skb_mac_header(skb); | |
1156 | int proto = IPPROTO_IP; | |
1157 | ||
1158 | if (skb->protocol == htons(ETH_P_IP)) | |
1159 | proto = ip_hdr(skb)->protocol; | |
1160 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
1161 | proto = ipv6_hdr(skb)->nexthdr; | |
1162 | ||
1163 | if (proto == IPPROTO_TCP) | |
1164 | hlen += tcp_hdr(skb)->doff * 4; | |
1165 | else if (proto == IPPROTO_UDP) | |
1166 | hlen += sizeof(struct udphdr); | |
1167 | else { | |
1168 | pr_err("vnet_handle_offloads GSO with unknown transport " | |
1169 | "protocol %d tproto %d\n", skb->protocol, proto); | |
1170 | hlen = 128; /* XXX */ | |
1171 | } | |
1172 | datalen = port->tsolen - hlen; | |
1173 | ||
1174 | gso_size = skb_shinfo(skb)->gso_size; | |
1175 | gso_type = skb_shinfo(skb)->gso_type; | |
1176 | gso_segs = skb_shinfo(skb)->gso_segs; | |
1177 | ||
1178 | if (port->tso && gso_size < datalen) | |
1179 | gso_segs = DIV_ROUND_UP(skb->len - hlen, datalen); | |
9a72dd4d | 1180 | |
368e36ed | 1181 | if (unlikely(vnet_tx_dring_avail(dr) < gso_segs)) { |
9a72dd4d DS |
1182 | struct netdev_queue *txq; |
1183 | ||
1184 | txq = netdev_get_tx_queue(dev, port->q_index); | |
1185 | netif_tx_stop_queue(txq); | |
1186 | if (vnet_tx_dring_avail(dr) < skb_shinfo(skb)->gso_segs) | |
1187 | return NETDEV_TX_BUSY; | |
1188 | netif_tx_wake_queue(txq); | |
1189 | } | |
1190 | ||
1191 | maclen = skb_network_header(skb) - skb_mac_header(skb); | |
1192 | skb_pull(skb, maclen); | |
1193 | ||
368e36ed | 1194 | if (port->tso && gso_size < datalen) { |
f7d70f74 DS |
1195 | if (skb_unclone(skb, GFP_ATOMIC)) |
1196 | goto out_dropped; | |
1197 | ||
368e36ed DS |
1198 | /* segment to TSO size */ |
1199 | skb_shinfo(skb)->gso_size = datalen; | |
1200 | skb_shinfo(skb)->gso_segs = gso_segs; | |
9a72dd4d | 1201 | } |
f7d70f74 DS |
1202 | segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO); |
1203 | if (IS_ERR(segs)) | |
1204 | goto out_dropped; | |
9a72dd4d DS |
1205 | |
1206 | skb_push(skb, maclen); | |
1207 | skb_reset_mac_header(skb); | |
1208 | ||
1209 | status = 0; | |
1210 | while (segs) { | |
1211 | struct sk_buff *curr = segs; | |
1212 | ||
1213 | segs = segs->next; | |
1214 | curr->next = NULL; | |
368e36ed DS |
1215 | if (port->tso && curr->len > dev->mtu) { |
1216 | skb_shinfo(curr)->gso_size = gso_size; | |
1217 | skb_shinfo(curr)->gso_type = gso_type; | |
1218 | skb_shinfo(curr)->gso_segs = | |
1219 | DIV_ROUND_UP(curr->len - hlen, gso_size); | |
1220 | } else | |
1221 | skb_shinfo(curr)->gso_size = 0; | |
9a72dd4d DS |
1222 | |
1223 | skb_push(curr, maclen); | |
1224 | skb_reset_mac_header(curr); | |
1225 | memcpy(skb_mac_header(curr), skb_mac_header(skb), | |
1226 | maclen); | |
1227 | curr->csum_start = skb_transport_header(curr) - curr->head; | |
1228 | if (ip_hdr(curr)->protocol == IPPROTO_TCP) | |
1229 | curr->csum_offset = offsetof(struct tcphdr, check); | |
1230 | else if (ip_hdr(curr)->protocol == IPPROTO_UDP) | |
1231 | curr->csum_offset = offsetof(struct udphdr, check); | |
1232 | ||
1233 | if (!(status & NETDEV_TX_MASK)) | |
1234 | status = vnet_start_xmit(curr, dev); | |
1235 | if (status & NETDEV_TX_MASK) | |
1236 | dev_kfree_skb_any(curr); | |
1237 | } | |
1238 | ||
1239 | if (!(status & NETDEV_TX_MASK)) | |
1240 | dev_kfree_skb_any(skb); | |
1241 | return status; | |
f7d70f74 DS |
1242 | out_dropped: |
1243 | dev->stats.tx_dropped++; | |
1244 | dev_kfree_skb_any(skb); | |
1245 | return NETDEV_TX_OK; | |
9a72dd4d DS |
1246 | } |
1247 | ||
4c521e42 DM |
1248 | static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev) |
1249 | { | |
1250 | struct vnet *vp = netdev_priv(dev); | |
2a968dd8 | 1251 | struct vnet_port *port = NULL; |
4c521e42 DM |
1252 | struct vio_dring_state *dr; |
1253 | struct vio_net_desc *d; | |
4c521e42 | 1254 | unsigned int len; |
8e845f4c DS |
1255 | struct sk_buff *freeskbs = NULL; |
1256 | int i, err, txi; | |
8e845f4c | 1257 | unsigned pending = 0; |
d51bffd1 | 1258 | struct netdev_queue *txq; |
4c521e42 | 1259 | |
2a968dd8 | 1260 | rcu_read_lock(); |
13b13dd9 | 1261 | port = __tx_port_find(vp, skb); |
df20286a SV |
1262 | if (unlikely(!port)) { |
1263 | rcu_read_unlock(); | |
2a968dd8 | 1264 | goto out_dropped; |
df20286a | 1265 | } |
2a968dd8 | 1266 | |
368e36ed | 1267 | if (skb_is_gso(skb) && skb->len > port->tsolen) { |
9a72dd4d DS |
1268 | err = vnet_handle_offloads(port, skb); |
1269 | rcu_read_unlock(); | |
1270 | return err; | |
1271 | } | |
1272 | ||
368e36ed | 1273 | if (!skb_is_gso(skb) && skb->len > port->rmtu) { |
a2b78e9b DS |
1274 | unsigned long localmtu = port->rmtu - ETH_HLEN; |
1275 | ||
1276 | if (vio_version_after_eq(&port->vio, 1, 3)) | |
1277 | localmtu -= VLAN_HLEN; | |
1278 | ||
1279 | if (skb->protocol == htons(ETH_P_IP)) { | |
1280 | struct flowi4 fl4; | |
1281 | struct rtable *rt = NULL; | |
1282 | ||
1283 | memset(&fl4, 0, sizeof(fl4)); | |
1284 | fl4.flowi4_oif = dev->ifindex; | |
1285 | fl4.flowi4_tos = RT_TOS(ip_hdr(skb)->tos); | |
1286 | fl4.daddr = ip_hdr(skb)->daddr; | |
1287 | fl4.saddr = ip_hdr(skb)->saddr; | |
1288 | ||
1289 | rt = ip_route_output_key(dev_net(dev), &fl4); | |
2a968dd8 | 1290 | rcu_read_unlock(); |
a2b78e9b DS |
1291 | if (!IS_ERR(rt)) { |
1292 | skb_dst_set(skb, &rt->dst); | |
1293 | icmp_send(skb, ICMP_DEST_UNREACH, | |
1294 | ICMP_FRAG_NEEDED, | |
1295 | htonl(localmtu)); | |
1296 | } | |
1297 | } | |
1298 | #if IS_ENABLED(CONFIG_IPV6) | |
1299 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
1300 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, localmtu); | |
1301 | #endif | |
42db672d | 1302 | goto out_dropped; |
a2b78e9b | 1303 | } |
42db672d | 1304 | |
da38c564 DS |
1305 | skb = vnet_skb_shape(skb, 2); |
1306 | ||
9cdfe2c7 | 1307 | if (unlikely(!skb)) |
da38c564 | 1308 | goto out_dropped; |
da38c564 | 1309 | |
1b6b0a47 DS |
1310 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
1311 | vnet_fullcsum(skb); | |
1312 | ||
4c521e42 | 1313 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
d51bffd1 SV |
1314 | i = skb_get_queue_mapping(skb); |
1315 | txq = netdev_get_tx_queue(dev, i); | |
d0aedcd4 | 1316 | if (unlikely(vnet_tx_dring_avail(dr) < 1)) { |
d51bffd1 SV |
1317 | if (!netif_tx_queue_stopped(txq)) { |
1318 | netif_tx_stop_queue(txq); | |
4c521e42 DM |
1319 | |
1320 | /* This is a hard error, log it. */ | |
4d5870ec | 1321 | netdev_err(dev, "BUG! Tx Ring full when queue awake!\n"); |
4c521e42 DM |
1322 | dev->stats.tx_errors++; |
1323 | } | |
2a968dd8 | 1324 | rcu_read_unlock(); |
4c521e42 DM |
1325 | return NETDEV_TX_BUSY; |
1326 | } | |
1327 | ||
1328 | d = vio_dring_cur(dr); | |
1329 | ||
8e845f4c DS |
1330 | txi = dr->prod; |
1331 | ||
1332 | freeskbs = vnet_clean_tx_ring(port, &pending); | |
1333 | ||
1334 | BUG_ON(port->tx_bufs[txi].skb); | |
4c521e42 DM |
1335 | |
1336 | len = skb->len; | |
8e845f4c | 1337 | if (len < ETH_ZLEN) |
4c521e42 | 1338 | len = ETH_ZLEN; |
8e845f4c | 1339 | |
da38c564 DS |
1340 | err = vnet_skb_map(port->vio.lp, skb, port->tx_bufs[txi].cookies, 2, |
1341 | (LDC_MAP_SHADOW | LDC_MAP_DIRECT | LDC_MAP_RW)); | |
8e845f4c DS |
1342 | if (err < 0) { |
1343 | netdev_info(dev, "tx buffer map error %d\n", err); | |
13b13dd9 | 1344 | goto out_dropped; |
4c521e42 | 1345 | } |
da38c564 DS |
1346 | |
1347 | port->tx_bufs[txi].skb = skb; | |
1348 | skb = NULL; | |
8e845f4c | 1349 | port->tx_bufs[txi].ncookies = err; |
4c521e42 | 1350 | |
1f6394e3 SV |
1351 | /* We don't rely on the ACKs to free the skb in vnet_start_xmit(), |
1352 | * thus it is safe to not set VIO_ACK_ENABLE for each transmission: | |
1353 | * the protocol itself does not require it as long as the peer | |
1354 | * sends a VIO_SUBTYPE_ACK for VIO_DRING_STOPPED. | |
1355 | * | |
1356 | * An ACK for every packet in the ring is expensive as the | |
1357 | * sending of LDC messages is slow and affects performance. | |
1358 | */ | |
1359 | d->hdr.ack = VIO_ACK_DISABLE; | |
4c521e42 | 1360 | d->size = len; |
8e845f4c | 1361 | d->ncookies = port->tx_bufs[txi].ncookies; |
4c521e42 | 1362 | for (i = 0; i < d->ncookies; i++) |
8e845f4c | 1363 | d->cookies[i] = port->tx_bufs[txi].cookies[i]; |
6d0ba919 DS |
1364 | if (vio_version_after_eq(&port->vio, 1, 7)) { |
1365 | struct vio_net_dext *dext = vio_net_ext(d); | |
1366 | ||
1367 | memset(dext, 0, sizeof(*dext)); | |
368e36ed DS |
1368 | if (skb_is_gso(port->tx_bufs[txi].skb)) { |
1369 | dext->ipv4_lso_mss = skb_shinfo(port->tx_bufs[txi].skb) | |
1370 | ->gso_size; | |
1371 | dext->flags |= VNET_PKT_IPV4_LSO; | |
1372 | } | |
6d0ba919 DS |
1373 | if (vio_version_after_eq(&port->vio, 1, 8) && |
1374 | !port->switch_port) { | |
1375 | dext->flags |= VNET_PKT_HCK_IPV4_HDRCKSUM_OK; | |
1376 | dext->flags |= VNET_PKT_HCK_FULLCKSUM_OK; | |
1377 | } | |
1378 | } | |
4c521e42 DM |
1379 | |
1380 | /* This has to be a non-SMP write barrier because we are writing | |
1381 | * to memory which is shared with the peer LDOM. | |
1382 | */ | |
b4468cc6 | 1383 | dma_wmb(); |
4c521e42 DM |
1384 | |
1385 | d->hdr.state = VIO_DESC_READY; | |
1386 | ||
d1015645 SV |
1387 | /* Exactly one ldc "start" trigger (for dr->cons) needs to be sent |
1388 | * to notify the consumer that some descriptors are READY. | |
1389 | * After that "start" trigger, no additional triggers are needed until | |
1390 | * a DRING_STOPPED is received from the consumer. The dr->cons field | |
1391 | * (set up by vnet_ack()) has the value of the next dring index | |
1392 | * that has not yet been ack-ed. We send a "start" trigger here | |
1393 | * if, and only if, start_cons is true (reset it afterward). Conversely, | |
1394 | * vnet_ack() should check if the dring corresponding to cons | |
1395 | * is marked READY, but start_cons was false. | |
1396 | * If so, vnet_ack() should send out the missed "start" trigger. | |
1397 | * | |
b4468cc6 | 1398 | * Note that the dma_wmb() above makes sure the cookies et al. are |
d1015645 SV |
1399 | * not globally visible before the VIO_DESC_READY, and that the |
1400 | * stores are ordered correctly by the compiler. The consumer will | |
1401 | * not proceed until the VIO_DESC_READY is visible assuring that | |
1402 | * the consumer does not observe anything related to descriptors | |
1403 | * out of order. The HV trap from the LDC start trigger is the | |
1404 | * producer to consumer announcement that work is available to the | |
1405 | * consumer | |
1406 | */ | |
1407 | if (!port->start_cons) | |
1408 | goto ldc_start_done; /* previous trigger suffices */ | |
1409 | ||
1410 | err = __vnet_tx_trigger(port, dr->cons); | |
4c521e42 | 1411 | if (unlikely(err < 0)) { |
4d5870ec | 1412 | netdev_info(dev, "TX trigger error %d\n", err); |
4c521e42 | 1413 | d->hdr.state = VIO_DESC_FREE; |
bb39b743 DS |
1414 | skb = port->tx_bufs[txi].skb; |
1415 | port->tx_bufs[txi].skb = NULL; | |
4c521e42 | 1416 | dev->stats.tx_carrier_errors++; |
13b13dd9 | 1417 | goto out_dropped; |
4c521e42 DM |
1418 | } |
1419 | ||
d1015645 SV |
1420 | ldc_start_done: |
1421 | port->start_cons = false; | |
1422 | ||
4c521e42 | 1423 | dev->stats.tx_packets++; |
8e845f4c | 1424 | dev->stats.tx_bytes += port->tx_bufs[txi].skb->len; |
4c521e42 DM |
1425 | |
1426 | dr->prod = (dr->prod + 1) & (VNET_TX_RING_SIZE - 1); | |
d0aedcd4 | 1427 | if (unlikely(vnet_tx_dring_avail(dr) < 1)) { |
d51bffd1 | 1428 | netif_tx_stop_queue(txq); |
4c521e42 | 1429 | if (vnet_tx_dring_avail(dr) > VNET_TX_WAKEUP_THRESH(dr)) |
d51bffd1 | 1430 | netif_tx_wake_queue(txq); |
4c521e42 DM |
1431 | } |
1432 | ||
2a968dd8 SV |
1433 | (void)mod_timer(&port->clean_timer, jiffies + VNET_CLEAN_TIMEOUT); |
1434 | rcu_read_unlock(); | |
4c521e42 | 1435 | |
8e845f4c DS |
1436 | vnet_free_skbs(freeskbs); |
1437 | ||
4c521e42 DM |
1438 | return NETDEV_TX_OK; |
1439 | ||
4c521e42 | 1440 | out_dropped: |
8e845f4c DS |
1441 | if (pending) |
1442 | (void)mod_timer(&port->clean_timer, | |
1443 | jiffies + VNET_CLEAN_TIMEOUT); | |
a29c9c43 | 1444 | else if (port) |
8e845f4c | 1445 | del_timer(&port->clean_timer); |
2a968dd8 SV |
1446 | if (port) |
1447 | rcu_read_unlock(); | |
1448 | if (skb) | |
1449 | dev_kfree_skb(skb); | |
1450 | vnet_free_skbs(freeskbs); | |
4c521e42 DM |
1451 | dev->stats.tx_dropped++; |
1452 | return NETDEV_TX_OK; | |
1453 | } | |
1454 | ||
1455 | static void vnet_tx_timeout(struct net_device *dev) | |
1456 | { | |
1457 | /* XXX Implement me XXX */ | |
1458 | } | |
1459 | ||
1460 | static int vnet_open(struct net_device *dev) | |
1461 | { | |
1462 | netif_carrier_on(dev); | |
d51bffd1 | 1463 | netif_tx_start_all_queues(dev); |
4c521e42 DM |
1464 | |
1465 | return 0; | |
1466 | } | |
1467 | ||
1468 | static int vnet_close(struct net_device *dev) | |
1469 | { | |
d51bffd1 | 1470 | netif_tx_stop_all_queues(dev); |
4c521e42 DM |
1471 | netif_carrier_off(dev); |
1472 | ||
1473 | return 0; | |
1474 | } | |
1475 | ||
028ebff2 DM |
1476 | static struct vnet_mcast_entry *__vnet_mc_find(struct vnet *vp, u8 *addr) |
1477 | { | |
1478 | struct vnet_mcast_entry *m; | |
1479 | ||
1480 | for (m = vp->mcast_list; m; m = m->next) { | |
00fa4ce9 | 1481 | if (ether_addr_equal(m->addr, addr)) |
028ebff2 DM |
1482 | return m; |
1483 | } | |
1484 | return NULL; | |
1485 | } | |
1486 | ||
1487 | static void __update_mc_list(struct vnet *vp, struct net_device *dev) | |
1488 | { | |
22bedad3 | 1489 | struct netdev_hw_addr *ha; |
028ebff2 | 1490 | |
22bedad3 | 1491 | netdev_for_each_mc_addr(ha, dev) { |
028ebff2 DM |
1492 | struct vnet_mcast_entry *m; |
1493 | ||
22bedad3 | 1494 | m = __vnet_mc_find(vp, ha->addr); |
028ebff2 DM |
1495 | if (m) { |
1496 | m->hit = 1; | |
1497 | continue; | |
1498 | } | |
1499 | ||
1500 | if (!m) { | |
1501 | m = kzalloc(sizeof(*m), GFP_ATOMIC); | |
1502 | if (!m) | |
1503 | continue; | |
22bedad3 | 1504 | memcpy(m->addr, ha->addr, ETH_ALEN); |
028ebff2 DM |
1505 | m->hit = 1; |
1506 | ||
1507 | m->next = vp->mcast_list; | |
1508 | vp->mcast_list = m; | |
1509 | } | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | static void __send_mc_list(struct vnet *vp, struct vnet_port *port) | |
1514 | { | |
1515 | struct vio_net_mcast_info info; | |
1516 | struct vnet_mcast_entry *m, **pp; | |
1517 | int n_addrs; | |
1518 | ||
1519 | memset(&info, 0, sizeof(info)); | |
1520 | ||
1521 | info.tag.type = VIO_TYPE_CTRL; | |
1522 | info.tag.stype = VIO_SUBTYPE_INFO; | |
1523 | info.tag.stype_env = VNET_MCAST_INFO; | |
1524 | info.tag.sid = vio_send_sid(&port->vio); | |
1525 | info.set = 1; | |
1526 | ||
1527 | n_addrs = 0; | |
1528 | for (m = vp->mcast_list; m; m = m->next) { | |
1529 | if (m->sent) | |
1530 | continue; | |
1531 | m->sent = 1; | |
1532 | memcpy(&info.mcast_addr[n_addrs * ETH_ALEN], | |
1533 | m->addr, ETH_ALEN); | |
1534 | if (++n_addrs == VNET_NUM_MCAST) { | |
1535 | info.count = n_addrs; | |
1536 | ||
1537 | (void) vio_ldc_send(&port->vio, &info, | |
1538 | sizeof(info)); | |
1539 | n_addrs = 0; | |
1540 | } | |
1541 | } | |
1542 | if (n_addrs) { | |
1543 | info.count = n_addrs; | |
1544 | (void) vio_ldc_send(&port->vio, &info, sizeof(info)); | |
1545 | } | |
1546 | ||
1547 | info.set = 0; | |
1548 | ||
1549 | n_addrs = 0; | |
1550 | pp = &vp->mcast_list; | |
1551 | while ((m = *pp) != NULL) { | |
1552 | if (m->hit) { | |
1553 | m->hit = 0; | |
1554 | pp = &m->next; | |
1555 | continue; | |
1556 | } | |
1557 | ||
1558 | memcpy(&info.mcast_addr[n_addrs * ETH_ALEN], | |
1559 | m->addr, ETH_ALEN); | |
1560 | if (++n_addrs == VNET_NUM_MCAST) { | |
1561 | info.count = n_addrs; | |
1562 | (void) vio_ldc_send(&port->vio, &info, | |
1563 | sizeof(info)); | |
1564 | n_addrs = 0; | |
1565 | } | |
1566 | ||
1567 | *pp = m->next; | |
1568 | kfree(m); | |
1569 | } | |
1570 | if (n_addrs) { | |
1571 | info.count = n_addrs; | |
1572 | (void) vio_ldc_send(&port->vio, &info, sizeof(info)); | |
1573 | } | |
1574 | } | |
1575 | ||
4c521e42 DM |
1576 | static void vnet_set_rx_mode(struct net_device *dev) |
1577 | { | |
028ebff2 DM |
1578 | struct vnet *vp = netdev_priv(dev); |
1579 | struct vnet_port *port; | |
028ebff2 | 1580 | |
2a968dd8 SV |
1581 | rcu_read_lock(); |
1582 | list_for_each_entry_rcu(port, &vp->port_list, list) { | |
028ebff2 DM |
1583 | |
1584 | if (port->switch_port) { | |
1585 | __update_mc_list(vp, dev); | |
1586 | __send_mc_list(vp, port); | |
2a968dd8 | 1587 | break; |
028ebff2 DM |
1588 | } |
1589 | } | |
2a968dd8 | 1590 | rcu_read_unlock(); |
4c521e42 DM |
1591 | } |
1592 | ||
1593 | static int vnet_change_mtu(struct net_device *dev, int new_mtu) | |
1594 | { | |
42db672d | 1595 | if (new_mtu < 68 || new_mtu > 65535) |
4c521e42 DM |
1596 | return -EINVAL; |
1597 | ||
1598 | dev->mtu = new_mtu; | |
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | static int vnet_set_mac_addr(struct net_device *dev, void *p) | |
1603 | { | |
1604 | return -EINVAL; | |
1605 | } | |
1606 | ||
1607 | static void vnet_get_drvinfo(struct net_device *dev, | |
1608 | struct ethtool_drvinfo *info) | |
1609 | { | |
7826d43f JP |
1610 | strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver)); |
1611 | strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version)); | |
4c521e42 DM |
1612 | } |
1613 | ||
1614 | static u32 vnet_get_msglevel(struct net_device *dev) | |
1615 | { | |
1616 | struct vnet *vp = netdev_priv(dev); | |
1617 | return vp->msg_enable; | |
1618 | } | |
1619 | ||
1620 | static void vnet_set_msglevel(struct net_device *dev, u32 value) | |
1621 | { | |
1622 | struct vnet *vp = netdev_priv(dev); | |
1623 | vp->msg_enable = value; | |
1624 | } | |
1625 | ||
1626 | static const struct ethtool_ops vnet_ethtool_ops = { | |
1627 | .get_drvinfo = vnet_get_drvinfo, | |
1628 | .get_msglevel = vnet_get_msglevel, | |
1629 | .set_msglevel = vnet_set_msglevel, | |
1630 | .get_link = ethtool_op_get_link, | |
4c521e42 DM |
1631 | }; |
1632 | ||
1633 | static void vnet_port_free_tx_bufs(struct vnet_port *port) | |
1634 | { | |
1635 | struct vio_dring_state *dr; | |
1636 | int i; | |
1637 | ||
1638 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; | |
07ac3e70 DS |
1639 | |
1640 | if (dr->base == NULL) | |
1641 | return; | |
4c521e42 DM |
1642 | |
1643 | for (i = 0; i < VNET_TX_RING_SIZE; i++) { | |
8e845f4c DS |
1644 | struct vio_net_desc *d; |
1645 | void *skb = port->tx_bufs[i].skb; | |
4c521e42 | 1646 | |
8e845f4c | 1647 | if (!skb) |
4c521e42 DM |
1648 | continue; |
1649 | ||
8e845f4c | 1650 | d = vio_dring_entry(dr, i); |
8e845f4c | 1651 | |
4c521e42 DM |
1652 | ldc_unmap(port->vio.lp, |
1653 | port->tx_bufs[i].cookies, | |
1654 | port->tx_bufs[i].ncookies); | |
8e845f4c DS |
1655 | dev_kfree_skb(skb); |
1656 | port->tx_bufs[i].skb = NULL; | |
1657 | d->hdr.state = VIO_DESC_FREE; | |
4c521e42 | 1658 | } |
07ac3e70 DS |
1659 | ldc_free_exp_dring(port->vio.lp, dr->base, |
1660 | (dr->entry_size * dr->num_entries), | |
1661 | dr->cookies, dr->ncookies); | |
1662 | dr->base = NULL; | |
1663 | dr->entry_size = 0; | |
1664 | dr->num_entries = 0; | |
1665 | dr->pending = 0; | |
1666 | dr->ncookies = 0; | |
4c521e42 DM |
1667 | } |
1668 | ||
8e2b60cd DS |
1669 | static void vnet_port_reset(struct vnet_port *port) |
1670 | { | |
1671 | del_timer(&port->clean_timer); | |
1672 | vnet_port_free_tx_bufs(port); | |
1673 | port->rmtu = 0; | |
1674 | port->tso = true; | |
1675 | port->tsolen = 0; | |
1676 | } | |
1677 | ||
d6732489 | 1678 | static int vnet_port_alloc_tx_ring(struct vnet_port *port) |
4c521e42 DM |
1679 | { |
1680 | struct vio_dring_state *dr; | |
6d0ba919 | 1681 | unsigned long len, elen; |
4c521e42 DM |
1682 | int i, err, ncookies; |
1683 | void *dring; | |
1684 | ||
4c521e42 DM |
1685 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
1686 | ||
6d0ba919 DS |
1687 | elen = sizeof(struct vio_net_desc) + |
1688 | sizeof(struct ldc_trans_cookie) * 2; | |
1689 | if (vio_version_after_eq(&port->vio, 1, 7)) | |
1690 | elen += sizeof(struct vio_net_dext); | |
1691 | len = VNET_TX_RING_SIZE * elen; | |
4c521e42 DM |
1692 | |
1693 | ncookies = VIO_MAX_RING_COOKIES; | |
1694 | dring = ldc_alloc_exp_dring(port->vio.lp, len, | |
1695 | dr->cookies, &ncookies, | |
1696 | (LDC_MAP_SHADOW | | |
1697 | LDC_MAP_DIRECT | | |
1698 | LDC_MAP_RW)); | |
1699 | if (IS_ERR(dring)) { | |
1700 | err = PTR_ERR(dring); | |
1701 | goto err_out; | |
1702 | } | |
1703 | ||
1704 | dr->base = dring; | |
6d0ba919 | 1705 | dr->entry_size = elen; |
4c521e42 DM |
1706 | dr->num_entries = VNET_TX_RING_SIZE; |
1707 | dr->prod = dr->cons = 0; | |
d1015645 | 1708 | port->start_cons = true; /* need an initial trigger */ |
4c521e42 DM |
1709 | dr->pending = VNET_TX_RING_SIZE; |
1710 | dr->ncookies = ncookies; | |
1711 | ||
8e845f4c DS |
1712 | for (i = 0; i < VNET_TX_RING_SIZE; ++i) { |
1713 | struct vio_net_desc *d; | |
1714 | ||
1715 | d = vio_dring_entry(dr, i); | |
1716 | d->hdr.state = VIO_DESC_FREE; | |
1717 | } | |
4c521e42 DM |
1718 | return 0; |
1719 | ||
1720 | err_out: | |
1721 | vnet_port_free_tx_bufs(port); | |
1722 | ||
1723 | return err; | |
1724 | } | |
1725 | ||
69088822 SV |
1726 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1727 | static void vnet_poll_controller(struct net_device *dev) | |
1728 | { | |
1729 | struct vnet *vp = netdev_priv(dev); | |
1730 | struct vnet_port *port; | |
1731 | unsigned long flags; | |
1732 | ||
1733 | spin_lock_irqsave(&vp->lock, flags); | |
1734 | if (!list_empty(&vp->port_list)) { | |
1735 | port = list_entry(vp->port_list.next, struct vnet_port, list); | |
1736 | napi_schedule(&port->napi); | |
1737 | } | |
1738 | spin_unlock_irqrestore(&vp->lock, flags); | |
1739 | } | |
1740 | #endif | |
9184a046 DM |
1741 | static LIST_HEAD(vnet_list); |
1742 | static DEFINE_MUTEX(vnet_list_mutex); | |
1743 | ||
8fd17f2e DM |
1744 | static const struct net_device_ops vnet_ops = { |
1745 | .ndo_open = vnet_open, | |
1746 | .ndo_stop = vnet_close, | |
afc4b13d | 1747 | .ndo_set_rx_mode = vnet_set_rx_mode, |
8fd17f2e | 1748 | .ndo_set_mac_address = vnet_set_mac_addr, |
240c102d | 1749 | .ndo_validate_addr = eth_validate_addr, |
8fd17f2e DM |
1750 | .ndo_tx_timeout = vnet_tx_timeout, |
1751 | .ndo_change_mtu = vnet_change_mtu, | |
1752 | .ndo_start_xmit = vnet_start_xmit, | |
d51bffd1 | 1753 | .ndo_select_queue = vnet_select_queue, |
69088822 SV |
1754 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1755 | .ndo_poll_controller = vnet_poll_controller, | |
1756 | #endif | |
8fd17f2e DM |
1757 | }; |
1758 | ||
4c5d283a SV |
1759 | static struct vnet *vnet_new(const u64 *local_mac, |
1760 | struct vio_dev *vdev) | |
9184a046 DM |
1761 | { |
1762 | struct net_device *dev; | |
1763 | struct vnet *vp; | |
1764 | int err, i; | |
1765 | ||
d51bffd1 | 1766 | dev = alloc_etherdev_mqs(sizeof(*vp), VNET_MAX_TXQS, 1); |
41de8d4c | 1767 | if (!dev) |
9184a046 | 1768 | return ERR_PTR(-ENOMEM); |
8e845f4c DS |
1769 | dev->needed_headroom = VNET_PACKET_SKIP + 8; |
1770 | dev->needed_tailroom = 8; | |
9184a046 DM |
1771 | |
1772 | for (i = 0; i < ETH_ALEN; i++) | |
1773 | dev->dev_addr[i] = (*local_mac >> (5 - i) * 8) & 0xff; | |
1774 | ||
9184a046 DM |
1775 | vp = netdev_priv(dev); |
1776 | ||
1777 | spin_lock_init(&vp->lock); | |
1778 | vp->dev = dev; | |
1779 | ||
1780 | INIT_LIST_HEAD(&vp->port_list); | |
1781 | for (i = 0; i < VNET_PORT_HASH_SIZE; i++) | |
1782 | INIT_HLIST_HEAD(&vp->port_hash[i]); | |
1783 | INIT_LIST_HEAD(&vp->list); | |
1784 | vp->local_mac = *local_mac; | |
1785 | ||
8fd17f2e | 1786 | dev->netdev_ops = &vnet_ops; |
9184a046 DM |
1787 | dev->ethtool_ops = &vnet_ethtool_ops; |
1788 | dev->watchdog_timeo = VNET_TX_TIMEOUT; | |
9184a046 | 1789 | |
368e36ed | 1790 | dev->hw_features = NETIF_F_TSO | NETIF_F_GSO | NETIF_F_GSO_SOFTWARE | |
9a72dd4d | 1791 | NETIF_F_HW_CSUM | NETIF_F_SG; |
da38c564 DS |
1792 | dev->features = dev->hw_features; |
1793 | ||
4c5d283a SV |
1794 | SET_NETDEV_DEV(dev, &vdev->dev); |
1795 | ||
9184a046 DM |
1796 | err = register_netdev(dev); |
1797 | if (err) { | |
4d5870ec | 1798 | pr_err("Cannot register net device, aborting\n"); |
9184a046 DM |
1799 | goto err_out_free_dev; |
1800 | } | |
1801 | ||
4d5870ec | 1802 | netdev_info(dev, "Sun LDOM vnet %pM\n", dev->dev_addr); |
9184a046 DM |
1803 | |
1804 | list_add(&vp->list, &vnet_list); | |
1805 | ||
1806 | return vp; | |
1807 | ||
1808 | err_out_free_dev: | |
1809 | free_netdev(dev); | |
1810 | ||
1811 | return ERR_PTR(err); | |
1812 | } | |
1813 | ||
4c5d283a SV |
1814 | static struct vnet *vnet_find_or_create(const u64 *local_mac, |
1815 | struct vio_dev *vdev) | |
9184a046 DM |
1816 | { |
1817 | struct vnet *iter, *vp; | |
1818 | ||
1819 | mutex_lock(&vnet_list_mutex); | |
1820 | vp = NULL; | |
1821 | list_for_each_entry(iter, &vnet_list, list) { | |
1822 | if (iter->local_mac == *local_mac) { | |
1823 | vp = iter; | |
1824 | break; | |
1825 | } | |
1826 | } | |
1827 | if (!vp) | |
4c5d283a | 1828 | vp = vnet_new(local_mac, vdev); |
9184a046 DM |
1829 | mutex_unlock(&vnet_list_mutex); |
1830 | ||
1831 | return vp; | |
1832 | } | |
1833 | ||
a4b70a07 SV |
1834 | static void vnet_cleanup(void) |
1835 | { | |
1836 | struct vnet *vp; | |
1837 | struct net_device *dev; | |
1838 | ||
1839 | mutex_lock(&vnet_list_mutex); | |
1840 | while (!list_empty(&vnet_list)) { | |
1841 | vp = list_first_entry(&vnet_list, struct vnet, list); | |
1842 | list_del(&vp->list); | |
1843 | dev = vp->dev; | |
1844 | /* vio_unregister_driver() should have cleaned up port_list */ | |
1845 | BUG_ON(!list_empty(&vp->port_list)); | |
1846 | unregister_netdev(dev); | |
1847 | free_netdev(dev); | |
1848 | } | |
1849 | mutex_unlock(&vnet_list_mutex); | |
1850 | } | |
1851 | ||
9184a046 DM |
1852 | static const char *local_mac_prop = "local-mac-address"; |
1853 | ||
f73d12bd | 1854 | static struct vnet *vnet_find_parent(struct mdesc_handle *hp, |
4c5d283a SV |
1855 | u64 port_node, |
1856 | struct vio_dev *vdev) | |
9184a046 DM |
1857 | { |
1858 | const u64 *local_mac = NULL; | |
1859 | u64 a; | |
1860 | ||
1861 | mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) { | |
1862 | u64 target = mdesc_arc_target(hp, a); | |
1863 | const char *name; | |
1864 | ||
1865 | name = mdesc_get_property(hp, target, "name", NULL); | |
1866 | if (!name || strcmp(name, "network")) | |
1867 | continue; | |
1868 | ||
1869 | local_mac = mdesc_get_property(hp, target, | |
1870 | local_mac_prop, NULL); | |
1871 | if (local_mac) | |
1872 | break; | |
1873 | } | |
1874 | if (!local_mac) | |
1875 | return ERR_PTR(-ENODEV); | |
1876 | ||
4c5d283a | 1877 | return vnet_find_or_create(local_mac, vdev); |
9184a046 DM |
1878 | } |
1879 | ||
4c521e42 DM |
1880 | static struct ldc_channel_config vnet_ldc_cfg = { |
1881 | .event = vnet_event, | |
1882 | .mtu = 64, | |
1883 | .mode = LDC_MODE_UNRELIABLE, | |
1884 | }; | |
1885 | ||
1886 | static struct vio_driver_ops vnet_vio_ops = { | |
1887 | .send_attr = vnet_send_attr, | |
1888 | .handle_attr = vnet_handle_attr, | |
1889 | .handshake_complete = vnet_handshake_complete, | |
1890 | }; | |
1891 | ||
f73d12bd | 1892 | static void print_version(void) |
9184a046 | 1893 | { |
4d5870ec | 1894 | printk_once(KERN_INFO "%s", version); |
9184a046 DM |
1895 | } |
1896 | ||
4c521e42 DM |
1897 | const char *remote_macaddr_prop = "remote-mac-address"; |
1898 | ||
d51bffd1 SV |
1899 | static void |
1900 | vnet_port_add_txq(struct vnet_port *port) | |
1901 | { | |
1902 | struct vnet *vp = port->vp; | |
1903 | int n; | |
1904 | ||
1905 | n = vp->nports++; | |
1906 | n = n & (VNET_MAX_TXQS - 1); | |
1907 | port->q_index = n; | |
1908 | netif_tx_wake_queue(netdev_get_tx_queue(vp->dev, port->q_index)); | |
1909 | } | |
1910 | ||
1911 | static void | |
1912 | vnet_port_rm_txq(struct vnet_port *port) | |
1913 | { | |
1914 | port->vp->nports--; | |
1915 | netif_tx_stop_queue(netdev_get_tx_queue(port->vp->dev, port->q_index)); | |
1916 | } | |
1917 | ||
1dd06ae8 | 1918 | static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
4c521e42 | 1919 | { |
43fdf274 | 1920 | struct mdesc_handle *hp; |
4c521e42 DM |
1921 | struct vnet_port *port; |
1922 | unsigned long flags; | |
1923 | struct vnet *vp; | |
1924 | const u64 *rmac; | |
1925 | int len, i, err, switch_port; | |
1926 | ||
9184a046 | 1927 | print_version(); |
4c521e42 | 1928 | |
43fdf274 DM |
1929 | hp = mdesc_grab(); |
1930 | ||
4c5d283a | 1931 | vp = vnet_find_parent(hp, vdev->mp, vdev); |
9184a046 | 1932 | if (IS_ERR(vp)) { |
4d5870ec | 1933 | pr_err("Cannot find port parent vnet\n"); |
9184a046 DM |
1934 | err = PTR_ERR(vp); |
1935 | goto err_out_put_mdesc; | |
1936 | } | |
1937 | ||
43fdf274 DM |
1938 | rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len); |
1939 | err = -ENODEV; | |
4c521e42 | 1940 | if (!rmac) { |
4d5870ec | 1941 | pr_err("Port lacks %s property\n", remote_macaddr_prop); |
43fdf274 | 1942 | goto err_out_put_mdesc; |
4c521e42 DM |
1943 | } |
1944 | ||
1945 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
43fdf274 | 1946 | err = -ENOMEM; |
e404decb | 1947 | if (!port) |
43fdf274 | 1948 | goto err_out_put_mdesc; |
4c521e42 DM |
1949 | |
1950 | for (i = 0; i < ETH_ALEN; i++) | |
1951 | port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff; | |
1952 | ||
1953 | port->vp = vp; | |
1954 | ||
43fdf274 | 1955 | err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK, |
4c521e42 DM |
1956 | vnet_versions, ARRAY_SIZE(vnet_versions), |
1957 | &vnet_vio_ops, vp->dev->name); | |
1958 | if (err) | |
1959 | goto err_out_free_port; | |
1960 | ||
1961 | err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port); | |
1962 | if (err) | |
1963 | goto err_out_free_port; | |
1964 | ||
69088822 SV |
1965 | netif_napi_add(port->vp->dev, &port->napi, vnet_poll, NAPI_POLL_WEIGHT); |
1966 | ||
4c521e42 DM |
1967 | INIT_HLIST_NODE(&port->hash); |
1968 | INIT_LIST_HEAD(&port->list); | |
1969 | ||
1970 | switch_port = 0; | |
43fdf274 | 1971 | if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL) != NULL) |
4c521e42 | 1972 | switch_port = 1; |
028ebff2 | 1973 | port->switch_port = switch_port; |
368e36ed DS |
1974 | port->tso = true; |
1975 | port->tsolen = 0; | |
4c521e42 DM |
1976 | |
1977 | spin_lock_irqsave(&vp->lock, flags); | |
1978 | if (switch_port) | |
2a968dd8 | 1979 | list_add_rcu(&port->list, &vp->port_list); |
4c521e42 | 1980 | else |
2a968dd8 SV |
1981 | list_add_tail_rcu(&port->list, &vp->port_list); |
1982 | hlist_add_head_rcu(&port->hash, | |
1983 | &vp->port_hash[vnet_hashfn(port->raddr)]); | |
d51bffd1 | 1984 | vnet_port_add_txq(port); |
4c521e42 DM |
1985 | spin_unlock_irqrestore(&vp->lock, flags); |
1986 | ||
1987 | dev_set_drvdata(&vdev->dev, port); | |
1988 | ||
4d5870ec JP |
1989 | pr_info("%s: PORT ( remote-mac %pM%s )\n", |
1990 | vp->dev->name, port->raddr, switch_port ? " switch-port" : ""); | |
4c521e42 | 1991 | |
8e845f4c DS |
1992 | setup_timer(&port->clean_timer, vnet_clean_timer_expire, |
1993 | (unsigned long)port); | |
1994 | ||
69088822 | 1995 | napi_enable(&port->napi); |
4c521e42 DM |
1996 | vio_port_up(&port->vio); |
1997 | ||
43fdf274 DM |
1998 | mdesc_release(hp); |
1999 | ||
4c521e42 DM |
2000 | return 0; |
2001 | ||
4c521e42 DM |
2002 | err_out_free_port: |
2003 | kfree(port); | |
2004 | ||
43fdf274 DM |
2005 | err_out_put_mdesc: |
2006 | mdesc_release(hp); | |
4c521e42 DM |
2007 | return err; |
2008 | } | |
2009 | ||
2010 | static int vnet_port_remove(struct vio_dev *vdev) | |
2011 | { | |
2012 | struct vnet_port *port = dev_get_drvdata(&vdev->dev); | |
2013 | ||
2014 | if (port) { | |
4c521e42 DM |
2015 | |
2016 | del_timer_sync(&port->vio.timer); | |
2017 | ||
69088822 | 2018 | napi_disable(&port->napi); |
4c521e42 | 2019 | |
2a968dd8 SV |
2020 | list_del_rcu(&port->list); |
2021 | hlist_del_rcu(&port->hash); | |
2022 | ||
2023 | synchronize_rcu(); | |
2024 | del_timer_sync(&port->clean_timer); | |
d51bffd1 | 2025 | vnet_port_rm_txq(port); |
69088822 | 2026 | netif_napi_del(&port->napi); |
4c521e42 DM |
2027 | vnet_port_free_tx_bufs(port); |
2028 | vio_ldc_free(&port->vio); | |
2029 | ||
2030 | dev_set_drvdata(&vdev->dev, NULL); | |
2031 | ||
2032 | kfree(port); | |
aabb9875 | 2033 | |
4c521e42 DM |
2034 | } |
2035 | return 0; | |
2036 | } | |
2037 | ||
3d452e55 | 2038 | static const struct vio_device_id vnet_port_match[] = { |
4c521e42 DM |
2039 | { |
2040 | .type = "vnet-port", | |
2041 | }, | |
2042 | {}, | |
2043 | }; | |
da68e081 | 2044 | MODULE_DEVICE_TABLE(vio, vnet_port_match); |
4c521e42 DM |
2045 | |
2046 | static struct vio_driver vnet_port_driver = { | |
2047 | .id_table = vnet_port_match, | |
2048 | .probe = vnet_port_probe, | |
2049 | .remove = vnet_port_remove, | |
cb52d897 | 2050 | .name = "vnet_port", |
4c521e42 DM |
2051 | }; |
2052 | ||
4c521e42 DM |
2053 | static int __init vnet_init(void) |
2054 | { | |
9184a046 | 2055 | return vio_register_driver(&vnet_port_driver); |
4c521e42 DM |
2056 | } |
2057 | ||
2058 | static void __exit vnet_exit(void) | |
2059 | { | |
2060 | vio_unregister_driver(&vnet_port_driver); | |
a4b70a07 | 2061 | vnet_cleanup(); |
4c521e42 DM |
2062 | } |
2063 | ||
2064 | module_init(vnet_init); | |
2065 | module_exit(vnet_exit); |