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fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
adf8d3ff | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
fceaf24a HJ |
15 | * |
16 | * Authors: | |
d0e94d17 | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 18 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 19 | */ |
eb335bc4 HJ |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
fceaf24a | 22 | #include <linux/init.h> |
9079ce69 | 23 | #include <linux/atomic.h> |
fceaf24a HJ |
24 | #include <linux/module.h> |
25 | #include <linux/highmem.h> | |
26 | #include <linux/device.h> | |
fceaf24a | 27 | #include <linux/io.h> |
fceaf24a HJ |
28 | #include <linux/delay.h> |
29 | #include <linux/netdevice.h> | |
30 | #include <linux/inetdevice.h> | |
31 | #include <linux/etherdevice.h> | |
32 | #include <linux/skbuff.h> | |
c802db11 | 33 | #include <linux/if_vlan.h> |
fceaf24a | 34 | #include <linux/in.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
27f5aa92 | 36 | #include <linux/rtnetlink.h> |
0c195567 | 37 | #include <linux/netpoll.h> |
27f5aa92 | 38 | |
fceaf24a HJ |
39 | #include <net/arp.h> |
40 | #include <net/route.h> | |
41 | #include <net/sock.h> | |
42 | #include <net/pkt_sched.h> | |
8eb1b3c3 MK |
43 | #include <net/checksum.h> |
44 | #include <net/ip6_checksum.h> | |
3f335ea2 | 45 | |
5ca7252a | 46 | #include "hyperv_net.h" |
fceaf24a | 47 | |
8b532797 | 48 | #define RING_SIZE_MIN 64 |
49 | #define NETVSC_MIN_TX_SECTIONS 10 | |
50 | #define NETVSC_DEFAULT_TX 192 /* ~1M */ | |
51 | #define NETVSC_MIN_RX_SECTIONS 10 /* ~64K */ | |
5023a6db | 52 | #define NETVSC_DEFAULT_RX 10485 /* Max ~16M */ |
8b532797 | 53 | |
27a70af3 | 54 | #define LINKCHANGE_INT (2 * HZ) |
6123c668 | 55 | #define VF_TAKEOVER_INT (HZ / 10) |
a50af86d | 56 | |
99c8da0f | 57 | static int ring_size = 128; |
450d7a4b SH |
58 | module_param(ring_size, int, S_IRUGO); |
59 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); | |
fceaf24a | 60 | |
3f300ff4 SX |
61 | static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | |
62 | NETIF_MSG_LINK | NETIF_MSG_IFUP | | |
63 | NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | | |
64 | NETIF_MSG_TX_ERR; | |
65 | ||
66 | static int debug = -1; | |
67 | module_param(debug, int, S_IRUGO); | |
68 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
69 | ||
4e9bfefa | 70 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a | 71 | { |
792df872 | 72 | struct net_device_context *net_device_ctx = netdev_priv(net); |
4f19c0d8 | 73 | struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
d426b2e3 | 74 | |
4f19c0d8 | 75 | rndis_filter_update(nvdev); |
fceaf24a HJ |
76 | } |
77 | ||
fceaf24a HJ |
78 | static int netvsc_open(struct net_device *net) |
79 | { | |
53fa1a6f | 80 | struct net_device_context *ndev_ctx = netdev_priv(net); |
0c195567 | 81 | struct net_device *vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); |
79e8cbe7 | 82 | struct netvsc_device *nvdev = rtnl_dereference(ndev_ctx->nvdev); |
891de74d | 83 | struct rndis_device *rdev; |
02fafbc6 | 84 | int ret = 0; |
fceaf24a | 85 | |
891de74d HZ |
86 | netif_carrier_off(net); |
87 | ||
d515d0ff | 88 | /* Open up the device */ |
2f5fa6c8 | 89 | ret = rndis_filter_open(nvdev); |
d515d0ff HZ |
90 | if (ret != 0) { |
91 | netdev_err(net, "unable to open device (ret %d).\n", ret); | |
92 | return ret; | |
fceaf24a HJ |
93 | } |
94 | ||
2de8530b | 95 | netif_tx_wake_all_queues(net); |
d515d0ff | 96 | |
891de74d | 97 | rdev = nvdev->extension; |
0c195567 | 98 | |
99 | if (!rdev->link_state) | |
891de74d HZ |
100 | netif_carrier_on(net); |
101 | ||
0c195567 | 102 | if (vf_netdev) { |
103 | /* Setting synthetic device up transparently sets | |
104 | * slave as up. If open fails, then slave will be | |
105 | * still be offline (and not used). | |
106 | */ | |
107 | ret = dev_open(vf_netdev); | |
108 | if (ret) | |
109 | netdev_warn(net, | |
110 | "unable to open slave: %s: %d\n", | |
111 | vf_netdev->name, ret); | |
112 | } | |
113 | return 0; | |
fceaf24a HJ |
114 | } |
115 | ||
fceaf24a HJ |
116 | static int netvsc_close(struct net_device *net) |
117 | { | |
fceaf24a | 118 | struct net_device_context *net_device_ctx = netdev_priv(net); |
0c195567 | 119 | struct net_device *vf_netdev |
120 | = rtnl_dereference(net_device_ctx->vf_netdev); | |
545a8e79 | 121 | struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
c6f71c41 | 122 | int ret = 0; |
40975962 | 123 | u32 aread, i, msec = 10, retry = 0, retry_max = 20; |
2de8530b | 124 | struct vmbus_channel *chn; |
fceaf24a | 125 | |
0a282538 | 126 | netif_tx_disable(net); |
fceaf24a | 127 | |
c6f71c41 HZ |
128 | /* No need to close rndis filter if it is removed already */ |
129 | if (!nvdev) | |
130 | goto out; | |
131 | ||
2f5fa6c8 | 132 | ret = rndis_filter_close(nvdev); |
2de8530b | 133 | if (ret != 0) { |
eb335bc4 | 134 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
2de8530b HZ |
135 | return ret; |
136 | } | |
137 | ||
138 | /* Ensure pending bytes in ring are read */ | |
139 | while (true) { | |
140 | aread = 0; | |
141 | for (i = 0; i < nvdev->num_chn; i++) { | |
b8b835a8 | 142 | chn = nvdev->chan_table[i].channel; |
2de8530b HZ |
143 | if (!chn) |
144 | continue; | |
145 | ||
40975962 | 146 | aread = hv_get_bytes_to_read(&chn->inbound); |
2de8530b HZ |
147 | if (aread) |
148 | break; | |
149 | ||
40975962 | 150 | aread = hv_get_bytes_to_read(&chn->outbound); |
2de8530b HZ |
151 | if (aread) |
152 | break; | |
153 | } | |
154 | ||
155 | retry++; | |
156 | if (retry > retry_max || aread == 0) | |
157 | break; | |
158 | ||
159 | msleep(msec); | |
160 | ||
161 | if (msec < 1000) | |
162 | msec *= 2; | |
163 | } | |
164 | ||
165 | if (aread) { | |
166 | netdev_err(net, "Ring buffer not empty after closing rndis\n"); | |
167 | ret = -ETIMEDOUT; | |
168 | } | |
fceaf24a | 169 | |
c6f71c41 | 170 | out: |
0c195567 | 171 | if (vf_netdev) |
172 | dev_close(vf_netdev); | |
173 | ||
fceaf24a HJ |
174 | return ret; |
175 | } | |
176 | ||
8a00251a | 177 | static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size, |
89bb42b1 | 178 | int pkt_type) |
8a00251a KS |
179 | { |
180 | struct rndis_packet *rndis_pkt; | |
181 | struct rndis_per_packet_info *ppi; | |
182 | ||
183 | rndis_pkt = &msg->msg.pkt; | |
184 | rndis_pkt->data_offset += ppi_size; | |
185 | ||
186 | ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt + | |
187 | rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len); | |
188 | ||
189 | ppi->size = ppi_size; | |
190 | ppi->type = pkt_type; | |
191 | ppi->ppi_offset = sizeof(struct rndis_per_packet_info); | |
192 | ||
193 | rndis_pkt->per_pkt_info_len += ppi_size; | |
194 | ||
195 | return ppi; | |
196 | } | |
197 | ||
4823eb2f HZ |
198 | /* Azure hosts don't support non-TCP port numbers in hashing for fragmented |
199 | * packets. We can use ethtool to change UDP hash level when necessary. | |
f72860af | 200 | */ |
4823eb2f HZ |
201 | static inline u32 netvsc_get_hash( |
202 | struct sk_buff *skb, | |
203 | const struct net_device_context *ndc) | |
f72860af HZ |
204 | { |
205 | struct flow_keys flow; | |
486e3981 | 206 | u32 hash, pkt_proto = 0; |
f72860af HZ |
207 | static u32 hashrnd __read_mostly; |
208 | ||
209 | net_get_random_once(&hashrnd, sizeof(hashrnd)); | |
210 | ||
211 | if (!skb_flow_dissect_flow_keys(skb, &flow, 0)) | |
212 | return 0; | |
213 | ||
486e3981 HZ |
214 | switch (flow.basic.ip_proto) { |
215 | case IPPROTO_TCP: | |
216 | if (flow.basic.n_proto == htons(ETH_P_IP)) | |
217 | pkt_proto = HV_TCP4_L4HASH; | |
218 | else if (flow.basic.n_proto == htons(ETH_P_IPV6)) | |
219 | pkt_proto = HV_TCP6_L4HASH; | |
220 | ||
221 | break; | |
222 | ||
223 | case IPPROTO_UDP: | |
224 | if (flow.basic.n_proto == htons(ETH_P_IP)) | |
225 | pkt_proto = HV_UDP4_L4HASH; | |
226 | else if (flow.basic.n_proto == htons(ETH_P_IPV6)) | |
227 | pkt_proto = HV_UDP6_L4HASH; | |
228 | ||
229 | break; | |
230 | } | |
231 | ||
232 | if (pkt_proto & ndc->l4_hash) { | |
f72860af HZ |
233 | return skb_get_hash(skb); |
234 | } else { | |
235 | if (flow.basic.n_proto == htons(ETH_P_IP)) | |
236 | hash = jhash2((u32 *)&flow.addrs.v4addrs, 2, hashrnd); | |
237 | else if (flow.basic.n_proto == htons(ETH_P_IPV6)) | |
238 | hash = jhash2((u32 *)&flow.addrs.v6addrs, 8, hashrnd); | |
239 | else | |
240 | hash = 0; | |
241 | ||
242 | skb_set_hash(skb, hash, PKT_HASH_TYPE_L3); | |
243 | } | |
244 | ||
245 | return hash; | |
246 | } | |
247 | ||
8db91f6a HZ |
248 | static inline int netvsc_get_tx_queue(struct net_device *ndev, |
249 | struct sk_buff *skb, int old_idx) | |
250 | { | |
251 | const struct net_device_context *ndc = netdev_priv(ndev); | |
252 | struct sock *sk = skb->sk; | |
253 | int q_idx; | |
254 | ||
39e91cfb HZ |
255 | q_idx = ndc->tx_table[netvsc_get_hash(skb, ndc) & |
256 | (VRSS_SEND_TAB_SIZE - 1)]; | |
8db91f6a HZ |
257 | |
258 | /* If queue index changed record the new value */ | |
259 | if (q_idx != old_idx && | |
260 | sk && sk_fullsock(sk) && rcu_access_pointer(sk->sk_dst_cache)) | |
261 | sk_tx_queue_set(sk, q_idx); | |
262 | ||
263 | return q_idx; | |
264 | } | |
265 | ||
d8e18ee0 | 266 | /* |
267 | * Select queue for transmit. | |
268 | * | |
269 | * If a valid queue has already been assigned, then use that. | |
270 | * Otherwise compute tx queue based on hash and the send table. | |
271 | * | |
272 | * This is basically similar to default (__netdev_pick_tx) with the added step | |
273 | * of using the host send_table when no other queue has been assigned. | |
274 | * | |
275 | * TODO support XPS - but get_xps_queue not exported | |
276 | */ | |
0c195567 | 277 | static u16 netvsc_pick_tx(struct net_device *ndev, struct sk_buff *skb) |
5b54dac8 | 278 | { |
8db91f6a HZ |
279 | int q_idx = sk_tx_queue_get(skb->sk); |
280 | ||
0c195567 | 281 | if (q_idx < 0 || skb->ooo_okay || q_idx >= ndev->real_num_tx_queues) { |
8db91f6a HZ |
282 | /* If forwarding a packet, we use the recorded queue when |
283 | * available for better cache locality. | |
284 | */ | |
285 | if (skb_rx_queue_recorded(skb)) | |
286 | q_idx = skb_get_rx_queue(skb); | |
287 | else | |
288 | q_idx = netvsc_get_tx_queue(ndev, skb, q_idx); | |
d8e18ee0 | 289 | } |
5b54dac8 HZ |
290 | |
291 | return q_idx; | |
292 | } | |
293 | ||
0c195567 | 294 | static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, |
295 | void *accel_priv, | |
296 | select_queue_fallback_t fallback) | |
297 | { | |
298 | struct net_device_context *ndc = netdev_priv(ndev); | |
299 | struct net_device *vf_netdev; | |
300 | u16 txq; | |
301 | ||
302 | rcu_read_lock(); | |
303 | vf_netdev = rcu_dereference(ndc->vf_netdev); | |
304 | if (vf_netdev) { | |
305 | txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; | |
306 | qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; | |
307 | } else { | |
308 | txq = netvsc_pick_tx(ndev, skb); | |
309 | } | |
310 | rcu_read_unlock(); | |
311 | ||
312 | while (unlikely(txq >= ndev->real_num_tx_queues)) | |
313 | txq -= ndev->real_num_tx_queues; | |
314 | ||
315 | return txq; | |
316 | } | |
317 | ||
54a7357f | 318 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
89bb42b1 | 319 | struct hv_page_buffer *pb) |
54a7357f KS |
320 | { |
321 | int j = 0; | |
322 | ||
323 | /* Deal with compund pages by ignoring unused part | |
324 | * of the page. | |
325 | */ | |
326 | page += (offset >> PAGE_SHIFT); | |
327 | offset &= ~PAGE_MASK; | |
328 | ||
329 | while (len > 0) { | |
330 | unsigned long bytes; | |
331 | ||
332 | bytes = PAGE_SIZE - offset; | |
333 | if (bytes > len) | |
334 | bytes = len; | |
335 | pb[j].pfn = page_to_pfn(page); | |
336 | pb[j].offset = offset; | |
337 | pb[j].len = bytes; | |
338 | ||
339 | offset += bytes; | |
340 | len -= bytes; | |
341 | ||
342 | if (offset == PAGE_SIZE && len) { | |
343 | page++; | |
344 | offset = 0; | |
345 | j++; | |
346 | } | |
347 | } | |
348 | ||
349 | return j + 1; | |
350 | } | |
351 | ||
8a00251a | 352 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
a9f2e2d6 | 353 | struct hv_netvsc_packet *packet, |
02b6de01 | 354 | struct hv_page_buffer *pb) |
54a7357f KS |
355 | { |
356 | u32 slots_used = 0; | |
357 | char *data = skb->data; | |
358 | int frags = skb_shinfo(skb)->nr_frags; | |
359 | int i; | |
360 | ||
361 | /* The packet is laid out thus: | |
aa0a34be | 362 | * 1. hdr: RNDIS header and PPI |
54a7357f KS |
363 | * 2. skb linear data |
364 | * 3. skb fragment data | |
365 | */ | |
ea5a32c0 | 366 | slots_used += fill_pg_buf(virt_to_page(hdr), |
367 | offset_in_page(hdr), | |
368 | len, &pb[slots_used]); | |
54a7357f | 369 | |
aa0a34be HZ |
370 | packet->rmsg_size = len; |
371 | packet->rmsg_pgcnt = slots_used; | |
372 | ||
54a7357f KS |
373 | slots_used += fill_pg_buf(virt_to_page(data), |
374 | offset_in_page(data), | |
375 | skb_headlen(skb), &pb[slots_used]); | |
376 | ||
377 | for (i = 0; i < frags; i++) { | |
378 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
379 | ||
380 | slots_used += fill_pg_buf(skb_frag_page(frag), | |
381 | frag->page_offset, | |
382 | skb_frag_size(frag), &pb[slots_used]); | |
383 | } | |
8a00251a | 384 | return slots_used; |
54a7357f KS |
385 | } |
386 | ||
80d887db | 387 | static int count_skb_frag_slots(struct sk_buff *skb) |
388 | { | |
389 | int i, frags = skb_shinfo(skb)->nr_frags; | |
390 | int pages = 0; | |
391 | ||
392 | for (i = 0; i < frags; i++) { | |
393 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
394 | unsigned long size = skb_frag_size(frag); | |
395 | unsigned long offset = frag->page_offset; | |
396 | ||
397 | /* Skip unused frames from start of page */ | |
398 | offset &= ~PAGE_MASK; | |
399 | pages += PFN_UP(offset + size); | |
400 | } | |
401 | return pages; | |
402 | } | |
403 | ||
404 | static int netvsc_get_slots(struct sk_buff *skb) | |
54a7357f | 405 | { |
80d887db | 406 | char *data = skb->data; |
407 | unsigned int offset = offset_in_page(data); | |
408 | unsigned int len = skb_headlen(skb); | |
409 | int slots; | |
410 | int frag_slots; | |
411 | ||
412 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); | |
413 | frag_slots = count_skb_frag_slots(skb); | |
414 | return slots + frag_slots; | |
54a7357f KS |
415 | } |
416 | ||
23312a3b | 417 | static u32 net_checksum_info(struct sk_buff *skb) |
08cd04bf | 418 | { |
23312a3b | 419 | if (skb->protocol == htons(ETH_P_IP)) { |
420 | struct iphdr *ip = ip_hdr(skb); | |
08cd04bf | 421 | |
23312a3b | 422 | if (ip->protocol == IPPROTO_TCP) |
423 | return TRANSPORT_INFO_IPV4_TCP; | |
424 | else if (ip->protocol == IPPROTO_UDP) | |
425 | return TRANSPORT_INFO_IPV4_UDP; | |
08cd04bf | 426 | } else { |
23312a3b | 427 | struct ipv6hdr *ip6 = ipv6_hdr(skb); |
428 | ||
429 | if (ip6->nexthdr == IPPROTO_TCP) | |
430 | return TRANSPORT_INFO_IPV6_TCP; | |
37b9dfa0 | 431 | else if (ip6->nexthdr == IPPROTO_UDP) |
23312a3b | 432 | return TRANSPORT_INFO_IPV6_UDP; |
08cd04bf KS |
433 | } |
434 | ||
23312a3b | 435 | return TRANSPORT_INFO_NOT_IP; |
08cd04bf KS |
436 | } |
437 | ||
0c195567 | 438 | /* Send skb on the slave VF device. */ |
439 | static int netvsc_vf_xmit(struct net_device *net, struct net_device *vf_netdev, | |
440 | struct sk_buff *skb) | |
441 | { | |
442 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
443 | unsigned int len = skb->len; | |
444 | int rc; | |
445 | ||
446 | skb->dev = vf_netdev; | |
447 | skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping; | |
448 | ||
449 | rc = dev_queue_xmit(skb); | |
450 | if (likely(rc == NET_XMIT_SUCCESS || rc == NET_XMIT_CN)) { | |
451 | struct netvsc_vf_pcpu_stats *pcpu_stats | |
452 | = this_cpu_ptr(ndev_ctx->vf_stats); | |
453 | ||
454 | u64_stats_update_begin(&pcpu_stats->syncp); | |
455 | pcpu_stats->tx_packets++; | |
456 | pcpu_stats->tx_bytes += len; | |
457 | u64_stats_update_end(&pcpu_stats->syncp); | |
458 | } else { | |
459 | this_cpu_inc(ndev_ctx->vf_stats->tx_dropped); | |
460 | } | |
461 | ||
462 | return rc; | |
463 | } | |
464 | ||
02fafbc6 | 465 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 466 | { |
fceaf24a | 467 | struct net_device_context *net_device_ctx = netdev_priv(net); |
981a1bd8 | 468 | struct hv_netvsc_packet *packet = NULL; |
02fafbc6 | 469 | int ret; |
8a00251a KS |
470 | unsigned int num_data_pgs; |
471 | struct rndis_message *rndis_msg; | |
472 | struct rndis_packet *rndis_pkt; | |
0c195567 | 473 | struct net_device *vf_netdev; |
8a00251a | 474 | u32 rndis_msg_size; |
8a00251a | 475 | struct rndis_per_packet_info *ppi; |
307f0995 | 476 | u32 hash; |
02b6de01 | 477 | struct hv_page_buffer pb[MAX_PAGE_BUFFER_COUNT]; |
fceaf24a | 478 | |
0c195567 | 479 | /* if VF is present and up then redirect packets |
480 | * already called with rcu_read_lock_bh | |
481 | */ | |
482 | vf_netdev = rcu_dereference_bh(net_device_ctx->vf_netdev); | |
483 | if (vf_netdev && netif_running(vf_netdev) && | |
484 | !netpoll_tx_running(net)) | |
485 | return netvsc_vf_xmit(net, vf_netdev, skb); | |
486 | ||
80d887db | 487 | /* We will atmost need two pages to describe the rndis |
488 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number | |
e88f7e07 VK |
489 | * of pages in a single packet. If skb is scattered around |
490 | * more pages we try linearizing it. | |
54a7357f | 491 | */ |
80d887db | 492 | |
493 | num_data_pgs = netvsc_get_slots(skb) + 2; | |
494 | ||
0ab05141 | 495 | if (unlikely(num_data_pgs > MAX_PAGE_BUFFER_COUNT)) { |
4323b47c SH |
496 | ++net_device_ctx->eth_stats.tx_scattered; |
497 | ||
498 | if (skb_linearize(skb)) | |
499 | goto no_memory; | |
0ab05141 | 500 | |
80d887db | 501 | num_data_pgs = netvsc_get_slots(skb) + 2; |
0ab05141 | 502 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { |
4323b47c | 503 | ++net_device_ctx->eth_stats.tx_too_big; |
0ab05141 SH |
504 | goto drop; |
505 | } | |
54a7357f | 506 | } |
fceaf24a | 507 | |
c0eb4540 KS |
508 | /* |
509 | * Place the rndis header in the skb head room and | |
510 | * the skb->cb will be used for hv_netvsc_packet | |
511 | * structure. | |
512 | */ | |
513 | ret = skb_cow_head(skb, RNDIS_AND_PPI_SIZE); | |
4323b47c SH |
514 | if (ret) |
515 | goto no_memory; | |
516 | ||
c0eb4540 KS |
517 | /* Use the skb control buffer for building up the packet */ |
518 | BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) > | |
519 | FIELD_SIZEOF(struct sk_buff, cb)); | |
520 | packet = (struct hv_netvsc_packet *)skb->cb; | |
fceaf24a | 521 | |
5b54dac8 HZ |
522 | packet->q_idx = skb_get_queue_mapping(skb); |
523 | ||
4d447c9a | 524 | packet->total_data_buflen = skb->len; |
793e3955 | 525 | packet->total_bytes = skb->len; |
526 | packet->total_packets = 1; | |
fceaf24a | 527 | |
c0eb4540 | 528 | rndis_msg = (struct rndis_message *)skb->head; |
b08cc791 | 529 | |
24476760 | 530 | memset(rndis_msg, 0, RNDIS_AND_PPI_SIZE); |
fceaf24a | 531 | |
8a00251a | 532 | /* Add the rndis header */ |
8a00251a KS |
533 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; |
534 | rndis_msg->msg_len = packet->total_data_buflen; | |
535 | rndis_pkt = &rndis_msg->msg.pkt; | |
536 | rndis_pkt->data_offset = sizeof(struct rndis_packet); | |
537 | rndis_pkt->data_len = packet->total_data_buflen; | |
538 | rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); | |
539 | ||
540 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); | |
541 | ||
307f0995 HZ |
542 | hash = skb_get_hash_raw(skb); |
543 | if (hash != 0 && net->real_num_tx_queues > 1) { | |
544 | rndis_msg_size += NDIS_HASH_PPI_SIZE; | |
545 | ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE, | |
546 | NBL_HASH_VALUE); | |
547 | *(u32 *)((void *)ppi + ppi->ppi_offset) = hash; | |
548 | } | |
549 | ||
0ab05141 | 550 | if (skb_vlan_tag_present(skb)) { |
8a00251a KS |
551 | struct ndis_pkt_8021q_info *vlan; |
552 | ||
553 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; | |
554 | ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, | |
00f5024e | 555 | IEEE_8021Q_INFO); |
556 | ||
557 | vlan = (void *)ppi + ppi->ppi_offset; | |
760d1e36 KS |
558 | vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK; |
559 | vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >> | |
8a00251a KS |
560 | VLAN_PRIO_SHIFT; |
561 | } | |
562 | ||
23312a3b | 563 | if (skb_is_gso(skb)) { |
0ab05141 SH |
564 | struct ndis_tcp_lso_info *lso_info; |
565 | ||
566 | rndis_msg_size += NDIS_LSO_PPI_SIZE; | |
567 | ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, | |
568 | TCP_LARGESEND_PKTINFO); | |
569 | ||
00f5024e | 570 | lso_info = (void *)ppi + ppi->ppi_offset; |
0ab05141 SH |
571 | |
572 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; | |
23312a3b | 573 | if (skb->protocol == htons(ETH_P_IP)) { |
0ab05141 SH |
574 | lso_info->lso_v2_transmit.ip_version = |
575 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; | |
576 | ip_hdr(skb)->tot_len = 0; | |
577 | ip_hdr(skb)->check = 0; | |
578 | tcp_hdr(skb)->check = | |
579 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
580 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
581 | } else { | |
582 | lso_info->lso_v2_transmit.ip_version = | |
583 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; | |
584 | ipv6_hdr(skb)->payload_len = 0; | |
585 | tcp_hdr(skb)->check = | |
586 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
587 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
588 | } | |
23312a3b | 589 | lso_info->lso_v2_transmit.tcp_header_offset = skb_transport_offset(skb); |
0ab05141 | 590 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; |
ad19bc8a | 591 | } else if (skb->ip_summed == CHECKSUM_PARTIAL) { |
23312a3b | 592 | if (net_checksum_info(skb) & net_device_ctx->tx_checksum_mask) { |
593 | struct ndis_tcp_ip_checksum_info *csum_info; | |
594 | ||
ad19bc8a | 595 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; |
596 | ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, | |
597 | TCPIP_CHKSUM_PKTINFO); | |
598 | ||
599 | csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + | |
600 | ppi->ppi_offset); | |
601 | ||
23312a3b | 602 | csum_info->transmit.tcp_header_offset = skb_transport_offset(skb); |
603 | ||
604 | if (skb->protocol == htons(ETH_P_IP)) { | |
ad19bc8a | 605 | csum_info->transmit.is_ipv4 = 1; |
23312a3b | 606 | |
607 | if (ip_hdr(skb)->protocol == IPPROTO_TCP) | |
608 | csum_info->transmit.tcp_checksum = 1; | |
609 | else | |
610 | csum_info->transmit.udp_checksum = 1; | |
611 | } else { | |
ad19bc8a | 612 | csum_info->transmit.is_ipv6 = 1; |
613 | ||
23312a3b | 614 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
615 | csum_info->transmit.tcp_checksum = 1; | |
616 | else | |
617 | csum_info->transmit.udp_checksum = 1; | |
618 | } | |
ad19bc8a | 619 | } else { |
23312a3b | 620 | /* Can't do offload of this type of checksum */ |
ad19bc8a | 621 | if (skb_checksum_help(skb)) |
622 | goto drop; | |
623 | } | |
08cd04bf KS |
624 | } |
625 | ||
8a00251a KS |
626 | /* Start filling in the page buffers with the rndis hdr */ |
627 | rndis_msg->msg_len += rndis_msg_size; | |
942396b0 | 628 | packet->total_data_buflen = rndis_msg->msg_len; |
8a00251a | 629 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, |
02b6de01 | 630 | skb, packet, pb); |
8a00251a | 631 | |
76d13b56 | 632 | /* timestamp packet in software */ |
633 | skb_tx_timestamp(skb); | |
2a926f79 | 634 | |
02b6de01 | 635 | ret = netvsc_send(net_device_ctx, packet, rndis_msg, pb, skb); |
793e3955 | 636 | if (likely(ret == 0)) |
0ab05141 | 637 | return NETDEV_TX_OK; |
4323b47c SH |
638 | |
639 | if (ret == -EAGAIN) { | |
640 | ++net_device_ctx->eth_stats.tx_busy; | |
0ab05141 | 641 | return NETDEV_TX_BUSY; |
4323b47c SH |
642 | } |
643 | ||
644 | if (ret == -ENOSPC) | |
645 | ++net_device_ctx->eth_stats.tx_no_space; | |
0ab05141 SH |
646 | |
647 | drop: | |
648 | dev_kfree_skb_any(skb); | |
649 | net->stats.tx_dropped++; | |
fceaf24a | 650 | |
0ab05141 | 651 | return NETDEV_TX_OK; |
4323b47c SH |
652 | |
653 | no_memory: | |
654 | ++net_device_ctx->eth_stats.tx_no_memory; | |
655 | goto drop; | |
fceaf24a | 656 | } |
89bb42b1 | 657 | |
3e189519 | 658 | /* |
02fafbc6 GKH |
659 | * netvsc_linkstatus_callback - Link up/down notification |
660 | */ | |
90ef117a | 661 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
3a494e71 | 662 | struct rndis_message *resp) |
fceaf24a | 663 | { |
3a494e71 | 664 | struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
2ddd5e5f | 665 | struct net_device *net; |
c996edcf | 666 | struct net_device_context *ndev_ctx; |
27a70af3 VK |
667 | struct netvsc_reconfig *event; |
668 | unsigned long flags; | |
891de74d | 669 | |
7f5d5af0 HZ |
670 | net = hv_get_drvdata(device_obj); |
671 | ||
672 | if (!net) | |
673 | return; | |
674 | ||
675 | ndev_ctx = netdev_priv(net); | |
676 | ||
677 | /* Update the physical link speed when changing to another vSwitch */ | |
678 | if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) { | |
679 | u32 speed; | |
680 | ||
89bb42b1 | 681 | speed = *(u32 *)((void *)indicate |
682 | + indicate->status_buf_offset) / 10000; | |
7f5d5af0 HZ |
683 | ndev_ctx->speed = speed; |
684 | return; | |
685 | } | |
686 | ||
687 | /* Handle these link change statuses below */ | |
27a70af3 VK |
688 | if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE && |
689 | indicate->status != RNDIS_STATUS_MEDIA_CONNECT && | |
690 | indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT) | |
3a494e71 | 691 | return; |
891de74d | 692 | |
7f5d5af0 | 693 | if (net->reg_state != NETREG_REGISTERED) |
fceaf24a | 694 | return; |
fceaf24a | 695 | |
27a70af3 VK |
696 | event = kzalloc(sizeof(*event), GFP_ATOMIC); |
697 | if (!event) | |
698 | return; | |
699 | event->event = indicate->status; | |
700 | ||
701 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
702 | list_add_tail(&event->list, &ndev_ctx->reconfig_events); | |
703 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
704 | ||
705 | schedule_delayed_work(&ndev_ctx->dwork, 0); | |
fceaf24a HJ |
706 | } |
707 | ||
84bf9cef | 708 | static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net, |
e91e7dd7 | 709 | struct napi_struct *napi, |
dc54a08c | 710 | const struct ndis_tcp_ip_checksum_info *csum_info, |
711 | const struct ndis_pkt_8021q_info *vlan, | |
712 | void *data, u32 buflen) | |
fceaf24a | 713 | { |
fceaf24a | 714 | struct sk_buff *skb; |
fceaf24a | 715 | |
e91e7dd7 | 716 | skb = napi_alloc_skb(napi, buflen); |
84bf9cef KS |
717 | if (!skb) |
718 | return skb; | |
fceaf24a | 719 | |
02fafbc6 GKH |
720 | /* |
721 | * Copy to skb. This copy is needed here since the memory pointed by | |
722 | * hv_netvsc_packet cannot be deallocated | |
723 | */ | |
59ae1d12 | 724 | skb_put_data(skb, data, buflen); |
fceaf24a HJ |
725 | |
726 | skb->protocol = eth_type_trans(skb, net); | |
e52fed71 SH |
727 | |
728 | /* skb is already created with CHECKSUM_NONE */ | |
729 | skb_checksum_none_assert(skb); | |
730 | ||
731 | /* | |
732 | * In Linux, the IP checksum is always checked. | |
733 | * Do L4 checksum offload if enabled and present. | |
734 | */ | |
735 | if (csum_info && (net->features & NETIF_F_RXCSUM)) { | |
736 | if (csum_info->receive.tcp_checksum_succeeded || | |
737 | csum_info->receive.udp_checksum_succeeded) | |
e3d605ed | 738 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
e3d605ed KS |
739 | } |
740 | ||
dc54a08c | 741 | if (vlan) { |
742 | u16 vlan_tci = vlan->vlanid | (vlan->pri << VLAN_PRIO_SHIFT); | |
743 | ||
93725cbd | 744 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
760d1e36 | 745 | vlan_tci); |
dc54a08c | 746 | } |
fceaf24a | 747 | |
84bf9cef KS |
748 | return skb; |
749 | } | |
750 | ||
751 | /* | |
752 | * netvsc_recv_callback - Callback when we receive a packet from the | |
753 | * "wire" on the specified device. | |
754 | */ | |
dc54a08c | 755 | int netvsc_recv_callback(struct net_device *net, |
756 | struct vmbus_channel *channel, | |
757 | void *data, u32 len, | |
758 | const struct ndis_tcp_ip_checksum_info *csum_info, | |
759 | const struct ndis_pkt_8021q_info *vlan) | |
84bf9cef | 760 | { |
3d541ac5 | 761 | struct net_device_context *net_device_ctx = netdev_priv(net); |
545a8e79 | 762 | struct netvsc_device *net_device; |
742fe54c | 763 | u16 q_idx = channel->offermsg.offer.sub_channel_index; |
545a8e79 | 764 | struct netvsc_channel *nvchan; |
84bf9cef | 765 | struct sk_buff *skb; |
84bf9cef | 766 | struct netvsc_stats *rx_stats; |
84bf9cef | 767 | |
9cbcc428 | 768 | if (net->reg_state != NETREG_REGISTERED) |
84bf9cef KS |
769 | return NVSP_STAT_FAIL; |
770 | ||
0719e72c | 771 | rcu_read_lock(); |
545a8e79 | 772 | net_device = rcu_dereference(net_device_ctx->nvdev); |
773 | if (unlikely(!net_device)) | |
774 | goto drop; | |
775 | ||
776 | nvchan = &net_device->chan_table[q_idx]; | |
84bf9cef KS |
777 | |
778 | /* Allocate a skb - TODO direct I/O to pages? */ | |
e91e7dd7 | 779 | skb = netvsc_alloc_recv_skb(net, &nvchan->napi, |
780 | csum_info, vlan, data, len); | |
84bf9cef | 781 | if (unlikely(!skb)) { |
545a8e79 | 782 | drop: |
84bf9cef | 783 | ++net->stats.rx_dropped; |
0719e72c | 784 | rcu_read_unlock(); |
84bf9cef KS |
785 | return NVSP_STAT_FAIL; |
786 | } | |
5b54dac8 | 787 | |
0c195567 | 788 | skb_record_rx_queue(skb, q_idx); |
9cbcc428 SH |
789 | |
790 | /* | |
791 | * Even if injecting the packet, record the statistics | |
792 | * on the synthetic device because modifying the VF device | |
793 | * statistics will not work correctly. | |
794 | */ | |
742fe54c | 795 | rx_stats = &nvchan->rx_stats; |
4b02b58b | 796 | u64_stats_update_begin(&rx_stats->syncp); |
7eafd9b4 | 797 | rx_stats->packets++; |
dc54a08c | 798 | rx_stats->bytes += len; |
f7ad75b7 SH |
799 | |
800 | if (skb->pkt_type == PACKET_BROADCAST) | |
801 | ++rx_stats->broadcast; | |
802 | else if (skb->pkt_type == PACKET_MULTICAST) | |
803 | ++rx_stats->multicast; | |
4b02b58b | 804 | u64_stats_update_end(&rx_stats->syncp); |
9495c282 | 805 | |
742fe54c | 806 | napi_gro_receive(&nvchan->napi, skb); |
0719e72c | 807 | rcu_read_unlock(); |
fceaf24a | 808 | |
fceaf24a HJ |
809 | return 0; |
810 | } | |
811 | ||
f82f4ad7 SH |
812 | static void netvsc_get_drvinfo(struct net_device *net, |
813 | struct ethtool_drvinfo *info) | |
814 | { | |
7826d43f | 815 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 816 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
f82f4ad7 SH |
817 | } |
818 | ||
59995370 AS |
819 | static void netvsc_get_channels(struct net_device *net, |
820 | struct ethtool_channels *channel) | |
821 | { | |
822 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
545a8e79 | 823 | struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
59995370 AS |
824 | |
825 | if (nvdev) { | |
826 | channel->max_combined = nvdev->max_chn; | |
827 | channel->combined_count = nvdev->num_chn; | |
828 | } | |
829 | } | |
830 | ||
b5960e6e AS |
831 | static int netvsc_set_channels(struct net_device *net, |
832 | struct ethtool_channels *channels) | |
833 | { | |
834 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
835 | struct hv_device *dev = net_device_ctx->device_ctx; | |
545a8e79 | 836 | struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
7ca45933 | 837 | unsigned int orig, count = channels->combined_count; |
838 | struct netvsc_device_info device_info; | |
ea383bf1 | 839 | bool was_opened; |
7ca45933 | 840 | int ret = 0; |
2b01888d | 841 | |
842 | /* We do not support separate count for rx, tx, or other */ | |
843 | if (count == 0 || | |
844 | channels->rx_count || channels->tx_count || channels->other_count) | |
845 | return -EINVAL; | |
846 | ||
a0be450e | 847 | if (!nvdev || nvdev->destroy) |
b5960e6e AS |
848 | return -ENODEV; |
849 | ||
2b01888d | 850 | if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) |
b5960e6e | 851 | return -EINVAL; |
b5960e6e | 852 | |
2b01888d | 853 | if (count > nvdev->max_chn) |
b5960e6e AS |
854 | return -EINVAL; |
855 | ||
7ca45933 | 856 | orig = nvdev->num_chn; |
ea383bf1 | 857 | was_opened = rndis_filter_opened(nvdev); |
858 | if (was_opened) | |
859 | rndis_filter_close(nvdev); | |
b5960e6e | 860 | |
7ca45933 | 861 | memset(&device_info, 0, sizeof(device_info)); |
862 | device_info.num_chn = count; | |
863 | device_info.ring_size = ring_size; | |
8b532797 | 864 | device_info.send_sections = nvdev->send_section_cnt; |
0ab09bef | 865 | device_info.send_section_size = nvdev->send_section_size; |
8b532797 | 866 | device_info.recv_sections = nvdev->recv_section_cnt; |
0ab09bef | 867 | device_info.recv_section_size = nvdev->recv_section_size; |
8b532797 | 868 | |
869 | rndis_filter_device_remove(dev, nvdev); | |
7ca45933 | 870 | |
871 | nvdev = rndis_filter_device_add(dev, &device_info); | |
8195b139 | 872 | if (IS_ERR(nvdev)) { |
d6aac1f2 | 873 | ret = PTR_ERR(nvdev); |
7ca45933 | 874 | device_info.num_chn = orig; |
68d715f6 | 875 | nvdev = rndis_filter_device_add(dev, &device_info); |
876 | ||
877 | if (IS_ERR(nvdev)) { | |
878 | netdev_err(net, "restoring channel setting failed: %ld\n", | |
879 | PTR_ERR(nvdev)); | |
880 | return ret; | |
881 | } | |
7ca45933 | 882 | } |
b5960e6e | 883 | |
ea383bf1 | 884 | if (was_opened) |
885 | rndis_filter_open(nvdev); | |
163891d7 | 886 | |
1bdcec8a | 887 | /* We may have missed link change notifications */ |
1b01994a | 888 | net_device_ctx->last_reconfig = 0; |
1bdcec8a | 889 | schedule_delayed_work(&net_device_ctx->dwork, 0); |
b5960e6e AS |
890 | |
891 | return ret; | |
b5960e6e AS |
892 | } |
893 | ||
5e8456fd PR |
894 | static bool |
895 | netvsc_validate_ethtool_ss_cmd(const struct ethtool_link_ksettings *cmd) | |
49eb9389 | 896 | { |
5e8456fd PR |
897 | struct ethtool_link_ksettings diff1 = *cmd; |
898 | struct ethtool_link_ksettings diff2 = {}; | |
49eb9389 | 899 | |
5e8456fd PR |
900 | diff1.base.speed = 0; |
901 | diff1.base.duplex = 0; | |
49eb9389 | 902 | /* advertising and cmd are usually set */ |
5e8456fd PR |
903 | ethtool_link_ksettings_zero_link_mode(&diff1, advertising); |
904 | diff1.base.cmd = 0; | |
49eb9389 | 905 | /* We set port to PORT_OTHER */ |
5e8456fd | 906 | diff2.base.port = PORT_OTHER; |
49eb9389 | 907 | |
908 | return !memcmp(&diff1, &diff2, sizeof(diff1)); | |
909 | } | |
910 | ||
911 | static void netvsc_init_settings(struct net_device *dev) | |
912 | { | |
913 | struct net_device_context *ndc = netdev_priv(dev); | |
914 | ||
486e3981 | 915 | ndc->l4_hash = HV_DEFAULT_L4HASH; |
4823eb2f | 916 | |
49eb9389 | 917 | ndc->speed = SPEED_UNKNOWN; |
f3c9d40e | 918 | ndc->duplex = DUPLEX_FULL; |
49eb9389 | 919 | } |
920 | ||
5e8456fd PR |
921 | static int netvsc_get_link_ksettings(struct net_device *dev, |
922 | struct ethtool_link_ksettings *cmd) | |
49eb9389 | 923 | { |
924 | struct net_device_context *ndc = netdev_priv(dev); | |
925 | ||
5e8456fd PR |
926 | cmd->base.speed = ndc->speed; |
927 | cmd->base.duplex = ndc->duplex; | |
928 | cmd->base.port = PORT_OTHER; | |
49eb9389 | 929 | |
930 | return 0; | |
931 | } | |
932 | ||
5e8456fd PR |
933 | static int netvsc_set_link_ksettings(struct net_device *dev, |
934 | const struct ethtool_link_ksettings *cmd) | |
49eb9389 | 935 | { |
936 | struct net_device_context *ndc = netdev_priv(dev); | |
937 | u32 speed; | |
938 | ||
5e8456fd | 939 | speed = cmd->base.speed; |
49eb9389 | 940 | if (!ethtool_validate_speed(speed) || |
5e8456fd | 941 | !ethtool_validate_duplex(cmd->base.duplex) || |
49eb9389 | 942 | !netvsc_validate_ethtool_ss_cmd(cmd)) |
943 | return -EINVAL; | |
944 | ||
945 | ndc->speed = speed; | |
5e8456fd | 946 | ndc->duplex = cmd->base.duplex; |
49eb9389 | 947 | |
948 | return 0; | |
949 | } | |
950 | ||
4d447c9a HZ |
951 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
952 | { | |
953 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
0c195567 | 954 | struct net_device *vf_netdev = rtnl_dereference(ndevctx->vf_netdev); |
545a8e79 | 955 | struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); |
3d541ac5 | 956 | struct hv_device *hdev = ndevctx->device_ctx; |
9749fed5 | 957 | int orig_mtu = ndev->mtu; |
4d447c9a | 958 | struct netvsc_device_info device_info; |
ea383bf1 | 959 | bool was_opened; |
9749fed5 | 960 | int ret = 0; |
4d447c9a | 961 | |
a0be450e | 962 | if (!nvdev || nvdev->destroy) |
4d447c9a HZ |
963 | return -ENODEV; |
964 | ||
0c195567 | 965 | /* Change MTU of underlying VF netdev first. */ |
966 | if (vf_netdev) { | |
967 | ret = dev_set_mtu(vf_netdev, mtu); | |
968 | if (ret) | |
969 | return ret; | |
970 | } | |
971 | ||
ea383bf1 | 972 | netif_device_detach(ndev); |
973 | was_opened = rndis_filter_opened(nvdev); | |
974 | if (was_opened) | |
975 | rndis_filter_close(nvdev); | |
2de8530b | 976 | |
152669bd DC |
977 | memset(&device_info, 0, sizeof(device_info)); |
978 | device_info.ring_size = ring_size; | |
979 | device_info.num_chn = nvdev->num_chn; | |
8b532797 | 980 | device_info.send_sections = nvdev->send_section_cnt; |
0ab09bef | 981 | device_info.send_section_size = nvdev->send_section_size; |
8b532797 | 982 | device_info.recv_sections = nvdev->recv_section_cnt; |
0ab09bef | 983 | device_info.recv_section_size = nvdev->recv_section_size; |
152669bd | 984 | |
2289f0aa | 985 | rndis_filter_device_remove(hdev, nvdev); |
4d447c9a HZ |
986 | |
987 | ndev->mtu = mtu; | |
988 | ||
9749fed5 | 989 | nvdev = rndis_filter_device_add(hdev, &device_info); |
990 | if (IS_ERR(nvdev)) { | |
991 | ret = PTR_ERR(nvdev); | |
992 | ||
993 | /* Attempt rollback to original MTU */ | |
994 | ndev->mtu = orig_mtu; | |
68d715f6 | 995 | nvdev = rndis_filter_device_add(hdev, &device_info); |
0c195567 | 996 | |
997 | if (vf_netdev) | |
998 | dev_set_mtu(vf_netdev, orig_mtu); | |
68d715f6 | 999 | |
1000 | if (IS_ERR(nvdev)) { | |
1001 | netdev_err(ndev, "restoring mtu failed: %ld\n", | |
1002 | PTR_ERR(nvdev)); | |
1003 | return ret; | |
1004 | } | |
9749fed5 | 1005 | } |
4d447c9a | 1006 | |
ea383bf1 | 1007 | if (was_opened) |
1008 | rndis_filter_open(nvdev); | |
1009 | ||
1010 | netif_device_attach(ndev); | |
163891d7 | 1011 | |
1bdcec8a VK |
1012 | /* We may have missed link change notifications */ |
1013 | schedule_delayed_work(&ndevctx->dwork, 0); | |
1014 | ||
9749fed5 | 1015 | return ret; |
4d447c9a HZ |
1016 | } |
1017 | ||
0c195567 | 1018 | static void netvsc_get_vf_stats(struct net_device *net, |
1019 | struct netvsc_vf_pcpu_stats *tot) | |
1020 | { | |
1021 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
1022 | int i; | |
1023 | ||
1024 | memset(tot, 0, sizeof(*tot)); | |
1025 | ||
1026 | for_each_possible_cpu(i) { | |
1027 | const struct netvsc_vf_pcpu_stats *stats | |
1028 | = per_cpu_ptr(ndev_ctx->vf_stats, i); | |
1029 | u64 rx_packets, rx_bytes, tx_packets, tx_bytes; | |
1030 | unsigned int start; | |
1031 | ||
1032 | do { | |
1033 | start = u64_stats_fetch_begin_irq(&stats->syncp); | |
1034 | rx_packets = stats->rx_packets; | |
1035 | tx_packets = stats->tx_packets; | |
1036 | rx_bytes = stats->rx_bytes; | |
1037 | tx_bytes = stats->tx_bytes; | |
1038 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
1039 | ||
1040 | tot->rx_packets += rx_packets; | |
1041 | tot->tx_packets += tx_packets; | |
1042 | tot->rx_bytes += rx_bytes; | |
1043 | tot->tx_bytes += tx_bytes; | |
1044 | tot->tx_dropped += stats->tx_dropped; | |
1045 | } | |
1046 | } | |
1047 | ||
bc1f4470 | 1048 | static void netvsc_get_stats64(struct net_device *net, |
1049 | struct rtnl_link_stats64 *t) | |
7eafd9b4 | 1050 | { |
1051 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
776e726b | 1052 | struct netvsc_device *nvdev = rcu_dereference_rtnl(ndev_ctx->nvdev); |
0c195567 | 1053 | struct netvsc_vf_pcpu_stats vf_tot; |
89bb42b1 | 1054 | int i; |
6c80f3fc SX |
1055 | |
1056 | if (!nvdev) | |
1057 | return; | |
1058 | ||
0c195567 | 1059 | netdev_stats_to_stats64(t, &net->stats); |
1060 | ||
1061 | netvsc_get_vf_stats(net, &vf_tot); | |
1062 | t->rx_packets += vf_tot.rx_packets; | |
1063 | t->tx_packets += vf_tot.tx_packets; | |
1064 | t->rx_bytes += vf_tot.rx_bytes; | |
1065 | t->tx_bytes += vf_tot.tx_bytes; | |
1066 | t->tx_dropped += vf_tot.tx_dropped; | |
1067 | ||
6c80f3fc SX |
1068 | for (i = 0; i < nvdev->num_chn; i++) { |
1069 | const struct netvsc_channel *nvchan = &nvdev->chan_table[i]; | |
1070 | const struct netvsc_stats *stats; | |
1071 | u64 packets, bytes, multicast; | |
7eafd9b4 | 1072 | unsigned int start; |
1073 | ||
6c80f3fc | 1074 | stats = &nvchan->tx_stats; |
7eafd9b4 | 1075 | do { |
6c80f3fc SX |
1076 | start = u64_stats_fetch_begin_irq(&stats->syncp); |
1077 | packets = stats->packets; | |
1078 | bytes = stats->bytes; | |
1079 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
1080 | ||
1081 | t->tx_bytes += bytes; | |
1082 | t->tx_packets += packets; | |
7eafd9b4 | 1083 | |
6c80f3fc | 1084 | stats = &nvchan->rx_stats; |
7eafd9b4 | 1085 | do { |
6c80f3fc SX |
1086 | start = u64_stats_fetch_begin_irq(&stats->syncp); |
1087 | packets = stats->packets; | |
1088 | bytes = stats->bytes; | |
1089 | multicast = stats->multicast + stats->broadcast; | |
1090 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
1091 | ||
1092 | t->rx_bytes += bytes; | |
1093 | t->rx_packets += packets; | |
1094 | t->multicast += multicast; | |
7eafd9b4 | 1095 | } |
7eafd9b4 | 1096 | } |
1ce09e89 HZ |
1097 | |
1098 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
1099 | { | |
867047c4 | 1100 | struct net_device_context *ndc = netdev_priv(ndev); |
16ba3266 | 1101 | struct net_device *vf_netdev = rtnl_dereference(ndc->vf_netdev); |
867047c4 | 1102 | struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
1ce09e89 | 1103 | struct sockaddr *addr = p; |
1ce09e89 HZ |
1104 | int err; |
1105 | ||
16ba3266 | 1106 | err = eth_prepare_mac_addr_change(ndev, p); |
1107 | if (err) | |
1ce09e89 HZ |
1108 | return err; |
1109 | ||
867047c4 | 1110 | if (!nvdev) |
1111 | return -ENODEV; | |
1112 | ||
16ba3266 | 1113 | if (vf_netdev) { |
1114 | err = dev_set_mac_address(vf_netdev, addr); | |
1115 | if (err) | |
1116 | return err; | |
1117 | } | |
1118 | ||
867047c4 | 1119 | err = rndis_filter_set_device_mac(nvdev, addr->sa_data); |
16ba3266 | 1120 | if (!err) { |
1121 | eth_commit_mac_addr_change(ndev, p); | |
1122 | } else if (vf_netdev) { | |
1123 | /* rollback change on VF */ | |
1124 | memcpy(addr->sa_data, ndev->dev_addr, ETH_ALEN); | |
1125 | dev_set_mac_address(vf_netdev, addr); | |
1ce09e89 HZ |
1126 | } |
1127 | ||
1128 | return err; | |
1129 | } | |
1130 | ||
4323b47c SH |
1131 | static const struct { |
1132 | char name[ETH_GSTRING_LEN]; | |
1133 | u16 offset; | |
1134 | } netvsc_stats[] = { | |
1135 | { "tx_scattered", offsetof(struct netvsc_ethtool_stats, tx_scattered) }, | |
1136 | { "tx_no_memory", offsetof(struct netvsc_ethtool_stats, tx_no_memory) }, | |
1137 | { "tx_no_space", offsetof(struct netvsc_ethtool_stats, tx_no_space) }, | |
1138 | { "tx_too_big", offsetof(struct netvsc_ethtool_stats, tx_too_big) }, | |
1139 | { "tx_busy", offsetof(struct netvsc_ethtool_stats, tx_busy) }, | |
cad5c197 | 1140 | { "tx_send_full", offsetof(struct netvsc_ethtool_stats, tx_send_full) }, |
1141 | { "rx_comp_busy", offsetof(struct netvsc_ethtool_stats, rx_comp_busy) }, | |
09af87d1 SX |
1142 | { "stop_queue", offsetof(struct netvsc_ethtool_stats, stop_queue) }, |
1143 | { "wake_queue", offsetof(struct netvsc_ethtool_stats, wake_queue) }, | |
0c195567 | 1144 | }, vf_stats[] = { |
1145 | { "vf_rx_packets", offsetof(struct netvsc_vf_pcpu_stats, rx_packets) }, | |
1146 | { "vf_rx_bytes", offsetof(struct netvsc_vf_pcpu_stats, rx_bytes) }, | |
1147 | { "vf_tx_packets", offsetof(struct netvsc_vf_pcpu_stats, tx_packets) }, | |
1148 | { "vf_tx_bytes", offsetof(struct netvsc_vf_pcpu_stats, tx_bytes) }, | |
1149 | { "vf_tx_dropped", offsetof(struct netvsc_vf_pcpu_stats, tx_dropped) }, | |
4323b47c SH |
1150 | }; |
1151 | ||
6c80f3fc | 1152 | #define NETVSC_GLOBAL_STATS_LEN ARRAY_SIZE(netvsc_stats) |
0c195567 | 1153 | #define NETVSC_VF_STATS_LEN ARRAY_SIZE(vf_stats) |
6c80f3fc SX |
1154 | |
1155 | /* 4 statistics per queue (rx/tx packets/bytes) */ | |
1156 | #define NETVSC_QUEUE_STATS_LEN(dev) ((dev)->num_chn * 4) | |
1157 | ||
4323b47c SH |
1158 | static int netvsc_get_sset_count(struct net_device *dev, int string_set) |
1159 | { | |
6c80f3fc | 1160 | struct net_device_context *ndc = netdev_priv(dev); |
fbd4c7e7 | 1161 | struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
545a8e79 | 1162 | |
1163 | if (!nvdev) | |
1164 | return -ENODEV; | |
6c80f3fc | 1165 | |
4323b47c SH |
1166 | switch (string_set) { |
1167 | case ETH_SS_STATS: | |
0c195567 | 1168 | return NETVSC_GLOBAL_STATS_LEN |
1169 | + NETVSC_VF_STATS_LEN | |
1170 | + NETVSC_QUEUE_STATS_LEN(nvdev); | |
4323b47c SH |
1171 | default: |
1172 | return -EINVAL; | |
1173 | } | |
1174 | } | |
1175 | ||
1176 | static void netvsc_get_ethtool_stats(struct net_device *dev, | |
1177 | struct ethtool_stats *stats, u64 *data) | |
1178 | { | |
1179 | struct net_device_context *ndc = netdev_priv(dev); | |
867047c4 | 1180 | struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
4323b47c | 1181 | const void *nds = &ndc->eth_stats; |
6c80f3fc | 1182 | const struct netvsc_stats *qstats; |
0c195567 | 1183 | struct netvsc_vf_pcpu_stats sum; |
6c80f3fc SX |
1184 | unsigned int start; |
1185 | u64 packets, bytes; | |
1186 | int i, j; | |
4323b47c | 1187 | |
545a8e79 | 1188 | if (!nvdev) |
1189 | return; | |
1190 | ||
6c80f3fc | 1191 | for (i = 0; i < NETVSC_GLOBAL_STATS_LEN; i++) |
4323b47c | 1192 | data[i] = *(unsigned long *)(nds + netvsc_stats[i].offset); |
6c80f3fc | 1193 | |
0c195567 | 1194 | netvsc_get_vf_stats(dev, &sum); |
1195 | for (j = 0; j < NETVSC_VF_STATS_LEN; j++) | |
1196 | data[i++] = *(u64 *)((void *)&sum + vf_stats[j].offset); | |
1197 | ||
6c80f3fc SX |
1198 | for (j = 0; j < nvdev->num_chn; j++) { |
1199 | qstats = &nvdev->chan_table[j].tx_stats; | |
1200 | ||
1201 | do { | |
1202 | start = u64_stats_fetch_begin_irq(&qstats->syncp); | |
1203 | packets = qstats->packets; | |
1204 | bytes = qstats->bytes; | |
1205 | } while (u64_stats_fetch_retry_irq(&qstats->syncp, start)); | |
1206 | data[i++] = packets; | |
1207 | data[i++] = bytes; | |
1208 | ||
1209 | qstats = &nvdev->chan_table[j].rx_stats; | |
1210 | do { | |
1211 | start = u64_stats_fetch_begin_irq(&qstats->syncp); | |
1212 | packets = qstats->packets; | |
1213 | bytes = qstats->bytes; | |
1214 | } while (u64_stats_fetch_retry_irq(&qstats->syncp, start)); | |
1215 | data[i++] = packets; | |
1216 | data[i++] = bytes; | |
1217 | } | |
4323b47c SH |
1218 | } |
1219 | ||
1220 | static void netvsc_get_strings(struct net_device *dev, u32 stringset, u8 *data) | |
1221 | { | |
6c80f3fc | 1222 | struct net_device_context *ndc = netdev_priv(dev); |
867047c4 | 1223 | struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
6c80f3fc | 1224 | u8 *p = data; |
4323b47c SH |
1225 | int i; |
1226 | ||
545a8e79 | 1227 | if (!nvdev) |
1228 | return; | |
1229 | ||
4323b47c SH |
1230 | switch (stringset) { |
1231 | case ETH_SS_STATS: | |
0c195567 | 1232 | for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) { |
1233 | memcpy(p, netvsc_stats[i].name, ETH_GSTRING_LEN); | |
1234 | p += ETH_GSTRING_LEN; | |
1235 | } | |
1236 | ||
1237 | for (i = 0; i < ARRAY_SIZE(vf_stats); i++) { | |
1238 | memcpy(p, vf_stats[i].name, ETH_GSTRING_LEN); | |
1239 | p += ETH_GSTRING_LEN; | |
1240 | } | |
6c80f3fc | 1241 | |
6c80f3fc SX |
1242 | for (i = 0; i < nvdev->num_chn; i++) { |
1243 | sprintf(p, "tx_queue_%u_packets", i); | |
1244 | p += ETH_GSTRING_LEN; | |
1245 | sprintf(p, "tx_queue_%u_bytes", i); | |
1246 | p += ETH_GSTRING_LEN; | |
1247 | sprintf(p, "rx_queue_%u_packets", i); | |
1248 | p += ETH_GSTRING_LEN; | |
1249 | sprintf(p, "rx_queue_%u_bytes", i); | |
1250 | p += ETH_GSTRING_LEN; | |
1251 | } | |
1252 | ||
4323b47c SH |
1253 | break; |
1254 | } | |
1255 | } | |
1256 | ||
b5a5dc8d | 1257 | static int |
4823eb2f HZ |
1258 | netvsc_get_rss_hash_opts(struct net_device_context *ndc, |
1259 | struct ethtool_rxnfc *info) | |
b5a5dc8d | 1260 | { |
486e3981 HZ |
1261 | const u32 l4_flag = RXH_L4_B_0_1 | RXH_L4_B_2_3; |
1262 | ||
b5a5dc8d | 1263 | info->data = RXH_IP_SRC | RXH_IP_DST; |
1264 | ||
1265 | switch (info->flow_type) { | |
1266 | case TCP_V4_FLOW: | |
0518ec4f HZ |
1267 | if (ndc->l4_hash & HV_TCP4_L4HASH) |
1268 | info->data |= l4_flag; | |
1269 | ||
1270 | break; | |
1271 | ||
b5a5dc8d | 1272 | case TCP_V6_FLOW: |
0518ec4f HZ |
1273 | if (ndc->l4_hash & HV_TCP6_L4HASH) |
1274 | info->data |= l4_flag; | |
1275 | ||
4823eb2f HZ |
1276 | break; |
1277 | ||
b5a5dc8d | 1278 | case UDP_V4_FLOW: |
486e3981 HZ |
1279 | if (ndc->l4_hash & HV_UDP4_L4HASH) |
1280 | info->data |= l4_flag; | |
4823eb2f HZ |
1281 | |
1282 | break; | |
1283 | ||
b5a5dc8d | 1284 | case UDP_V6_FLOW: |
486e3981 HZ |
1285 | if (ndc->l4_hash & HV_UDP6_L4HASH) |
1286 | info->data |= l4_flag; | |
4823eb2f HZ |
1287 | |
1288 | break; | |
1289 | ||
b5a5dc8d | 1290 | case IPV4_FLOW: |
1291 | case IPV6_FLOW: | |
1292 | break; | |
1293 | default: | |
1294 | info->data = 0; | |
1295 | break; | |
1296 | } | |
1297 | ||
1298 | return 0; | |
1299 | } | |
1300 | ||
b448f4e8 | 1301 | static int |
1302 | netvsc_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info, | |
1303 | u32 *rules) | |
1304 | { | |
1305 | struct net_device_context *ndc = netdev_priv(dev); | |
867047c4 | 1306 | struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
545a8e79 | 1307 | |
1308 | if (!nvdev) | |
1309 | return -ENODEV; | |
b448f4e8 | 1310 | |
1311 | switch (info->cmd) { | |
1312 | case ETHTOOL_GRXRINGS: | |
1313 | info->data = nvdev->num_chn; | |
1314 | return 0; | |
b5a5dc8d | 1315 | |
1316 | case ETHTOOL_GRXFH: | |
4823eb2f | 1317 | return netvsc_get_rss_hash_opts(ndc, info); |
b448f4e8 | 1318 | } |
1319 | return -EOPNOTSUPP; | |
1320 | } | |
1321 | ||
4823eb2f HZ |
1322 | static int netvsc_set_rss_hash_opts(struct net_device_context *ndc, |
1323 | struct ethtool_rxnfc *info) | |
1324 | { | |
1325 | if (info->data == (RXH_IP_SRC | RXH_IP_DST | | |
1326 | RXH_L4_B_0_1 | RXH_L4_B_2_3)) { | |
486e3981 | 1327 | switch (info->flow_type) { |
0518ec4f HZ |
1328 | case TCP_V4_FLOW: |
1329 | ndc->l4_hash |= HV_TCP4_L4HASH; | |
1330 | break; | |
1331 | ||
1332 | case TCP_V6_FLOW: | |
1333 | ndc->l4_hash |= HV_TCP6_L4HASH; | |
1334 | break; | |
1335 | ||
486e3981 HZ |
1336 | case UDP_V4_FLOW: |
1337 | ndc->l4_hash |= HV_UDP4_L4HASH; | |
1338 | break; | |
1339 | ||
1340 | case UDP_V6_FLOW: | |
1341 | ndc->l4_hash |= HV_UDP6_L4HASH; | |
1342 | break; | |
1343 | ||
1344 | default: | |
4823eb2f | 1345 | return -EOPNOTSUPP; |
486e3981 | 1346 | } |
4823eb2f HZ |
1347 | |
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | if (info->data == (RXH_IP_SRC | RXH_IP_DST)) { | |
486e3981 | 1352 | switch (info->flow_type) { |
0518ec4f HZ |
1353 | case TCP_V4_FLOW: |
1354 | ndc->l4_hash &= ~HV_TCP4_L4HASH; | |
1355 | break; | |
1356 | ||
1357 | case TCP_V6_FLOW: | |
1358 | ndc->l4_hash &= ~HV_TCP6_L4HASH; | |
1359 | break; | |
1360 | ||
486e3981 HZ |
1361 | case UDP_V4_FLOW: |
1362 | ndc->l4_hash &= ~HV_UDP4_L4HASH; | |
1363 | break; | |
1364 | ||
1365 | case UDP_V6_FLOW: | |
1366 | ndc->l4_hash &= ~HV_UDP6_L4HASH; | |
1367 | break; | |
1368 | ||
1369 | default: | |
4823eb2f | 1370 | return -EOPNOTSUPP; |
486e3981 | 1371 | } |
4823eb2f HZ |
1372 | |
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | return -EOPNOTSUPP; | |
1377 | } | |
1378 | ||
1379 | static int | |
1380 | netvsc_set_rxnfc(struct net_device *ndev, struct ethtool_rxnfc *info) | |
1381 | { | |
1382 | struct net_device_context *ndc = netdev_priv(ndev); | |
1383 | ||
1384 | if (info->cmd == ETHTOOL_SRXFH) | |
1385 | return netvsc_set_rss_hash_opts(ndc, info); | |
1386 | ||
1387 | return -EOPNOTSUPP; | |
1388 | } | |
1389 | ||
316158fe | 1390 | #ifdef CONFIG_NET_POLL_CONTROLLER |
a5ecd439 | 1391 | static void netvsc_poll_controller(struct net_device *dev) |
316158fe | 1392 | { |
a5ecd439 | 1393 | struct net_device_context *ndc = netdev_priv(dev); |
1394 | struct netvsc_device *ndev; | |
1395 | int i; | |
1396 | ||
1397 | rcu_read_lock(); | |
1398 | ndev = rcu_dereference(ndc->nvdev); | |
1399 | if (ndev) { | |
1400 | for (i = 0; i < ndev->num_chn; i++) { | |
1401 | struct netvsc_channel *nvchan = &ndev->chan_table[i]; | |
1402 | ||
1403 | napi_schedule(&nvchan->napi); | |
1404 | } | |
1405 | } | |
1406 | rcu_read_unlock(); | |
316158fe RW |
1407 | } |
1408 | #endif | |
1ce09e89 | 1409 | |
962f3fee | 1410 | static u32 netvsc_get_rxfh_key_size(struct net_device *dev) |
1411 | { | |
1412 | return NETVSC_HASH_KEYLEN; | |
1413 | } | |
1414 | ||
1415 | static u32 netvsc_rss_indir_size(struct net_device *dev) | |
1416 | { | |
ff4a4419 | 1417 | return ITAB_NUM; |
962f3fee | 1418 | } |
1419 | ||
1420 | static int netvsc_get_rxfh(struct net_device *dev, u32 *indir, u8 *key, | |
1421 | u8 *hfunc) | |
1422 | { | |
1423 | struct net_device_context *ndc = netdev_priv(dev); | |
867047c4 | 1424 | struct netvsc_device *ndev = rtnl_dereference(ndc->nvdev); |
eb996edb | 1425 | struct rndis_device *rndis_dev; |
ff4a4419 | 1426 | int i; |
962f3fee | 1427 | |
545a8e79 | 1428 | if (!ndev) |
1429 | return -ENODEV; | |
1430 | ||
962f3fee | 1431 | if (hfunc) |
1432 | *hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */ | |
1433 | ||
eb996edb | 1434 | rndis_dev = ndev->extension; |
ff4a4419 | 1435 | if (indir) { |
1436 | for (i = 0; i < ITAB_NUM; i++) | |
47371300 | 1437 | indir[i] = rndis_dev->rx_table[i]; |
ff4a4419 | 1438 | } |
1439 | ||
962f3fee | 1440 | if (key) |
1441 | memcpy(key, rndis_dev->rss_key, NETVSC_HASH_KEYLEN); | |
1442 | ||
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | static int netvsc_set_rxfh(struct net_device *dev, const u32 *indir, | |
1447 | const u8 *key, const u8 hfunc) | |
1448 | { | |
1449 | struct net_device_context *ndc = netdev_priv(dev); | |
545a8e79 | 1450 | struct netvsc_device *ndev = rtnl_dereference(ndc->nvdev); |
eb996edb | 1451 | struct rndis_device *rndis_dev; |
ff4a4419 | 1452 | int i; |
962f3fee | 1453 | |
545a8e79 | 1454 | if (!ndev) |
1455 | return -ENODEV; | |
1456 | ||
962f3fee | 1457 | if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP) |
1458 | return -EOPNOTSUPP; | |
1459 | ||
eb996edb | 1460 | rndis_dev = ndev->extension; |
ff4a4419 | 1461 | if (indir) { |
1462 | for (i = 0; i < ITAB_NUM; i++) | |
db3cd7af | 1463 | if (indir[i] >= ndev->num_chn) |
ff4a4419 | 1464 | return -EINVAL; |
1465 | ||
1466 | for (i = 0; i < ITAB_NUM; i++) | |
47371300 | 1467 | rndis_dev->rx_table[i] = indir[i]; |
ff4a4419 | 1468 | } |
1469 | ||
1470 | if (!key) { | |
1471 | if (!indir) | |
1472 | return 0; | |
1473 | ||
1474 | key = rndis_dev->rss_key; | |
1475 | } | |
962f3fee | 1476 | |
715e2ec5 | 1477 | return rndis_filter_set_rss_param(rndis_dev, key); |
962f3fee | 1478 | } |
1479 | ||
8b532797 | 1480 | /* Hyper-V RNDIS protocol does not have ring in the HW sense. |
1481 | * It does have pre-allocated receive area which is divided into sections. | |
1482 | */ | |
1483 | static void __netvsc_get_ringparam(struct netvsc_device *nvdev, | |
1484 | struct ethtool_ringparam *ring) | |
1485 | { | |
1486 | u32 max_buf_size; | |
1487 | ||
1488 | ring->rx_pending = nvdev->recv_section_cnt; | |
1489 | ring->tx_pending = nvdev->send_section_cnt; | |
1490 | ||
1491 | if (nvdev->nvsp_version <= NVSP_PROTOCOL_VERSION_2) | |
1492 | max_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; | |
1493 | else | |
1494 | max_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; | |
1495 | ||
1496 | ring->rx_max_pending = max_buf_size / nvdev->recv_section_size; | |
1497 | ring->tx_max_pending = NETVSC_SEND_BUFFER_SIZE | |
1498 | / nvdev->send_section_size; | |
1499 | } | |
1500 | ||
1501 | static void netvsc_get_ringparam(struct net_device *ndev, | |
1502 | struct ethtool_ringparam *ring) | |
1503 | { | |
1504 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
1505 | struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); | |
1506 | ||
1507 | if (!nvdev) | |
1508 | return; | |
1509 | ||
1510 | __netvsc_get_ringparam(nvdev, ring); | |
1511 | } | |
1512 | ||
1513 | static int netvsc_set_ringparam(struct net_device *ndev, | |
1514 | struct ethtool_ringparam *ring) | |
1515 | { | |
1516 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
1517 | struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); | |
1518 | struct hv_device *hdev = ndevctx->device_ctx; | |
1519 | struct netvsc_device_info device_info; | |
1520 | struct ethtool_ringparam orig; | |
1521 | u32 new_tx, new_rx; | |
1522 | bool was_opened; | |
1523 | int ret = 0; | |
1524 | ||
1525 | if (!nvdev || nvdev->destroy) | |
1526 | return -ENODEV; | |
1527 | ||
1528 | memset(&orig, 0, sizeof(orig)); | |
1529 | __netvsc_get_ringparam(nvdev, &orig); | |
1530 | ||
1531 | new_tx = clamp_t(u32, ring->tx_pending, | |
1532 | NETVSC_MIN_TX_SECTIONS, orig.tx_max_pending); | |
1533 | new_rx = clamp_t(u32, ring->rx_pending, | |
1534 | NETVSC_MIN_RX_SECTIONS, orig.rx_max_pending); | |
1535 | ||
1536 | if (new_tx == orig.tx_pending && | |
1537 | new_rx == orig.rx_pending) | |
1538 | return 0; /* no change */ | |
1539 | ||
1540 | memset(&device_info, 0, sizeof(device_info)); | |
1541 | device_info.num_chn = nvdev->num_chn; | |
1542 | device_info.ring_size = ring_size; | |
1543 | device_info.send_sections = new_tx; | |
0ab09bef | 1544 | device_info.send_section_size = nvdev->send_section_size; |
8b532797 | 1545 | device_info.recv_sections = new_rx; |
0ab09bef | 1546 | device_info.recv_section_size = nvdev->recv_section_size; |
8b532797 | 1547 | |
1548 | netif_device_detach(ndev); | |
1549 | was_opened = rndis_filter_opened(nvdev); | |
1550 | if (was_opened) | |
1551 | rndis_filter_close(nvdev); | |
1552 | ||
1553 | rndis_filter_device_remove(hdev, nvdev); | |
1554 | ||
1555 | nvdev = rndis_filter_device_add(hdev, &device_info); | |
1556 | if (IS_ERR(nvdev)) { | |
1557 | ret = PTR_ERR(nvdev); | |
1558 | ||
1559 | device_info.send_sections = orig.tx_pending; | |
1560 | device_info.recv_sections = orig.rx_pending; | |
1561 | nvdev = rndis_filter_device_add(hdev, &device_info); | |
1562 | if (IS_ERR(nvdev)) { | |
1563 | netdev_err(ndev, "restoring ringparam failed: %ld\n", | |
1564 | PTR_ERR(nvdev)); | |
1565 | return ret; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | if (was_opened) | |
1570 | rndis_filter_open(nvdev); | |
1571 | netif_device_attach(ndev); | |
1572 | ||
1573 | /* We may have missed link change notifications */ | |
1574 | ndevctx->last_reconfig = 0; | |
1575 | schedule_delayed_work(&ndevctx->dwork, 0); | |
1576 | ||
1577 | return ret; | |
1578 | } | |
1579 | ||
f82f4ad7 SH |
1580 | static const struct ethtool_ops ethtool_ops = { |
1581 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 | 1582 | .get_link = ethtool_op_get_link, |
4323b47c SH |
1583 | .get_ethtool_stats = netvsc_get_ethtool_stats, |
1584 | .get_sset_count = netvsc_get_sset_count, | |
1585 | .get_strings = netvsc_get_strings, | |
59995370 | 1586 | .get_channels = netvsc_get_channels, |
b5960e6e | 1587 | .set_channels = netvsc_set_channels, |
76d13b56 | 1588 | .get_ts_info = ethtool_op_get_ts_info, |
b448f4e8 | 1589 | .get_rxnfc = netvsc_get_rxnfc, |
4823eb2f | 1590 | .set_rxnfc = netvsc_set_rxnfc, |
962f3fee | 1591 | .get_rxfh_key_size = netvsc_get_rxfh_key_size, |
1592 | .get_rxfh_indir_size = netvsc_rss_indir_size, | |
1593 | .get_rxfh = netvsc_get_rxfh, | |
1594 | .set_rxfh = netvsc_set_rxfh, | |
5e8456fd PR |
1595 | .get_link_ksettings = netvsc_get_link_ksettings, |
1596 | .set_link_ksettings = netvsc_set_link_ksettings, | |
8b532797 | 1597 | .get_ringparam = netvsc_get_ringparam, |
1598 | .set_ringparam = netvsc_set_ringparam, | |
f82f4ad7 SH |
1599 | }; |
1600 | ||
df2fff28 GKH |
1601 | static const struct net_device_ops device_ops = { |
1602 | .ndo_open = netvsc_open, | |
1603 | .ndo_stop = netvsc_close, | |
1604 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 1605 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 1606 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 1607 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 1608 | .ndo_set_mac_address = netvsc_set_mac_addr, |
5b54dac8 | 1609 | .ndo_select_queue = netvsc_select_queue, |
7eafd9b4 | 1610 | .ndo_get_stats64 = netvsc_get_stats64, |
316158fe RW |
1611 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1612 | .ndo_poll_controller = netvsc_poll_controller, | |
1613 | #endif | |
df2fff28 GKH |
1614 | }; |
1615 | ||
c996edcf | 1616 | /* |
27a70af3 VK |
1617 | * Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link |
1618 | * down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is | |
1619 | * present send GARP packet to network peers with netif_notify_peers(). | |
c996edcf | 1620 | */ |
891de74d | 1621 | static void netvsc_link_change(struct work_struct *w) |
c996edcf | 1622 | { |
0a1275ca VK |
1623 | struct net_device_context *ndev_ctx = |
1624 | container_of(w, struct net_device_context, dwork.work); | |
1625 | struct hv_device *device_obj = ndev_ctx->device_ctx; | |
1626 | struct net_device *net = hv_get_drvdata(device_obj); | |
2ddd5e5f | 1627 | struct netvsc_device *net_device; |
891de74d | 1628 | struct rndis_device *rdev; |
27a70af3 VK |
1629 | struct netvsc_reconfig *event = NULL; |
1630 | bool notify = false, reschedule = false; | |
1631 | unsigned long flags, next_reconfig, delay; | |
c996edcf | 1632 | |
9b4e946c | 1633 | /* if changes are happening, comeback later */ |
1634 | if (!rtnl_trylock()) { | |
1635 | schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); | |
1636 | return; | |
1637 | } | |
1638 | ||
a0be450e | 1639 | net_device = rtnl_dereference(ndev_ctx->nvdev); |
1640 | if (!net_device) | |
1bdcec8a VK |
1641 | goto out_unlock; |
1642 | ||
891de74d | 1643 | rdev = net_device->extension; |
891de74d | 1644 | |
27a70af3 VK |
1645 | next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT; |
1646 | if (time_is_after_jiffies(next_reconfig)) { | |
1647 | /* link_watch only sends one notification with current state | |
1648 | * per second, avoid doing reconfig more frequently. Handle | |
1649 | * wrap around. | |
1650 | */ | |
1651 | delay = next_reconfig - jiffies; | |
1652 | delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT; | |
1653 | schedule_delayed_work(&ndev_ctx->dwork, delay); | |
1bdcec8a | 1654 | goto out_unlock; |
27a70af3 VK |
1655 | } |
1656 | ndev_ctx->last_reconfig = jiffies; | |
1657 | ||
1658 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
1659 | if (!list_empty(&ndev_ctx->reconfig_events)) { | |
1660 | event = list_first_entry(&ndev_ctx->reconfig_events, | |
1661 | struct netvsc_reconfig, list); | |
1662 | list_del(&event->list); | |
1663 | reschedule = !list_empty(&ndev_ctx->reconfig_events); | |
1664 | } | |
1665 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
1666 | ||
1667 | if (!event) | |
1bdcec8a | 1668 | goto out_unlock; |
27a70af3 VK |
1669 | |
1670 | switch (event->event) { | |
1671 | /* Only the following events are possible due to the check in | |
1672 | * netvsc_linkstatus_callback() | |
1673 | */ | |
1674 | case RNDIS_STATUS_MEDIA_CONNECT: | |
1675 | if (rdev->link_state) { | |
1676 | rdev->link_state = false; | |
0c195567 | 1677 | netif_carrier_on(net); |
27a70af3 VK |
1678 | netif_tx_wake_all_queues(net); |
1679 | } else { | |
1680 | notify = true; | |
1681 | } | |
1682 | kfree(event); | |
1683 | break; | |
1684 | case RNDIS_STATUS_MEDIA_DISCONNECT: | |
1685 | if (!rdev->link_state) { | |
1686 | rdev->link_state = true; | |
1687 | netif_carrier_off(net); | |
1688 | netif_tx_stop_all_queues(net); | |
1689 | } | |
1690 | kfree(event); | |
1691 | break; | |
1692 | case RNDIS_STATUS_NETWORK_CHANGE: | |
1693 | /* Only makes sense if carrier is present */ | |
1694 | if (!rdev->link_state) { | |
1695 | rdev->link_state = true; | |
1696 | netif_carrier_off(net); | |
1697 | netif_tx_stop_all_queues(net); | |
1698 | event->event = RNDIS_STATUS_MEDIA_CONNECT; | |
1699 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
15cfd407 | 1700 | list_add(&event->list, &ndev_ctx->reconfig_events); |
27a70af3 VK |
1701 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
1702 | reschedule = true; | |
3a494e71 | 1703 | } |
27a70af3 | 1704 | break; |
891de74d HZ |
1705 | } |
1706 | ||
1707 | rtnl_unlock(); | |
1708 | ||
1709 | if (notify) | |
1710 | netdev_notify_peers(net); | |
27a70af3 VK |
1711 | |
1712 | /* link_watch only sends one notification with current state per | |
1713 | * second, handle next reconfig event in 2 seconds. | |
1714 | */ | |
1715 | if (reschedule) | |
1716 | schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); | |
1bdcec8a VK |
1717 | |
1718 | return; | |
1719 | ||
1720 | out_unlock: | |
1721 | rtnl_unlock(); | |
c996edcf HZ |
1722 | } |
1723 | ||
e8ff40d4 | 1724 | static struct net_device *get_netvsc_bymac(const u8 *mac) |
84bf9cef | 1725 | { |
e8ff40d4 | 1726 | struct net_device *dev; |
84bf9cef | 1727 | |
8737caaf | 1728 | ASSERT_RTNL(); |
84bf9cef KS |
1729 | |
1730 | for_each_netdev(&init_net, dev) { | |
e8ff40d4 SH |
1731 | if (dev->netdev_ops != &device_ops) |
1732 | continue; /* not a netvsc device */ | |
1733 | ||
1734 | if (ether_addr_equal(mac, dev->perm_addr)) | |
1735 | return dev; | |
1736 | } | |
1737 | ||
1738 | return NULL; | |
1739 | } | |
1740 | ||
f207c10d | 1741 | static struct net_device *get_netvsc_byref(struct net_device *vf_netdev) |
e8ff40d4 SH |
1742 | { |
1743 | struct net_device *dev; | |
1744 | ||
1745 | ASSERT_RTNL(); | |
1746 | ||
1747 | for_each_netdev(&init_net, dev) { | |
1748 | struct net_device_context *net_device_ctx; | |
1749 | ||
1750 | if (dev->netdev_ops != &device_ops) | |
1751 | continue; /* not a netvsc device */ | |
1752 | ||
1753 | net_device_ctx = netdev_priv(dev); | |
79e8cbe7 | 1754 | if (!rtnl_dereference(net_device_ctx->nvdev)) |
e8ff40d4 SH |
1755 | continue; /* device is removed */ |
1756 | ||
f207c10d | 1757 | if (rtnl_dereference(net_device_ctx->vf_netdev) == vf_netdev) |
e8ff40d4 | 1758 | return dev; /* a match */ |
84bf9cef | 1759 | } |
84bf9cef | 1760 | |
e8ff40d4 | 1761 | return NULL; |
84bf9cef KS |
1762 | } |
1763 | ||
0c195567 | 1764 | /* Called when VF is injecting data into network stack. |
1765 | * Change the associated network device from VF to netvsc. | |
1766 | * note: already called with rcu_read_lock | |
1767 | */ | |
1768 | static rx_handler_result_t netvsc_vf_handle_frame(struct sk_buff **pskb) | |
1769 | { | |
1770 | struct sk_buff *skb = *pskb; | |
1771 | struct net_device *ndev = rcu_dereference(skb->dev->rx_handler_data); | |
1772 | struct net_device_context *ndev_ctx = netdev_priv(ndev); | |
1773 | struct netvsc_vf_pcpu_stats *pcpu_stats | |
1774 | = this_cpu_ptr(ndev_ctx->vf_stats); | |
1775 | ||
1776 | skb->dev = ndev; | |
1777 | ||
1778 | u64_stats_update_begin(&pcpu_stats->syncp); | |
1779 | pcpu_stats->rx_packets++; | |
1780 | pcpu_stats->rx_bytes += skb->len; | |
1781 | u64_stats_update_end(&pcpu_stats->syncp); | |
1782 | ||
1783 | return RX_HANDLER_ANOTHER; | |
1784 | } | |
1785 | ||
1786 | static int netvsc_vf_join(struct net_device *vf_netdev, | |
1787 | struct net_device *ndev) | |
1788 | { | |
1789 | struct net_device_context *ndev_ctx = netdev_priv(ndev); | |
1790 | int ret; | |
1791 | ||
1792 | ret = netdev_rx_handler_register(vf_netdev, | |
1793 | netvsc_vf_handle_frame, ndev); | |
1794 | if (ret != 0) { | |
1795 | netdev_err(vf_netdev, | |
1796 | "can not register netvsc VF receive handler (err = %d)\n", | |
1797 | ret); | |
1798 | goto rx_handler_failed; | |
1799 | } | |
1800 | ||
42ab19ee | 1801 | ret = netdev_upper_dev_link(vf_netdev, ndev, NULL); |
0c195567 | 1802 | if (ret != 0) { |
1803 | netdev_err(vf_netdev, | |
1804 | "can not set master device %s (err = %d)\n", | |
1805 | ndev->name, ret); | |
1806 | goto upper_link_failed; | |
1807 | } | |
1808 | ||
1809 | /* set slave flag before open to prevent IPv6 addrconf */ | |
1810 | vf_netdev->flags |= IFF_SLAVE; | |
1811 | ||
6123c668 | 1812 | schedule_delayed_work(&ndev_ctx->vf_takeover, VF_TAKEOVER_INT); |
1813 | ||
1814 | call_netdevice_notifiers(NETDEV_JOIN, vf_netdev); | |
0c195567 | 1815 | |
1816 | netdev_info(vf_netdev, "joined to %s\n", ndev->name); | |
1817 | return 0; | |
1818 | ||
1819 | upper_link_failed: | |
1820 | netdev_rx_handler_unregister(vf_netdev); | |
1821 | rx_handler_failed: | |
1822 | return ret; | |
1823 | } | |
1824 | ||
1825 | static void __netvsc_vf_setup(struct net_device *ndev, | |
1826 | struct net_device *vf_netdev) | |
1827 | { | |
1828 | int ret; | |
1829 | ||
0c195567 | 1830 | /* Align MTU of VF with master */ |
1831 | ret = dev_set_mtu(vf_netdev, ndev->mtu); | |
1832 | if (ret) | |
1833 | netdev_warn(vf_netdev, | |
1834 | "unable to change mtu to %u\n", ndev->mtu); | |
1835 | ||
1836 | if (netif_running(ndev)) { | |
1837 | ret = dev_open(vf_netdev); | |
1838 | if (ret) | |
1839 | netdev_warn(vf_netdev, | |
1840 | "unable to open: %d\n", ret); | |
1841 | } | |
1842 | } | |
1843 | ||
1844 | /* Setup VF as slave of the synthetic device. | |
1845 | * Runs in workqueue to avoid recursion in netlink callbacks. | |
1846 | */ | |
1847 | static void netvsc_vf_setup(struct work_struct *w) | |
1848 | { | |
1849 | struct net_device_context *ndev_ctx | |
6123c668 | 1850 | = container_of(w, struct net_device_context, vf_takeover.work); |
0c195567 | 1851 | struct net_device *ndev = hv_get_drvdata(ndev_ctx->device_ctx); |
1852 | struct net_device *vf_netdev; | |
1853 | ||
fb84af8a | 1854 | if (!rtnl_trylock()) { |
6123c668 | 1855 | schedule_delayed_work(&ndev_ctx->vf_takeover, 0); |
fb84af8a | 1856 | return; |
1857 | } | |
1858 | ||
0c195567 | 1859 | vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); |
1860 | if (vf_netdev) | |
1861 | __netvsc_vf_setup(ndev, vf_netdev); | |
1862 | ||
1863 | rtnl_unlock(); | |
1864 | } | |
1865 | ||
84bf9cef KS |
1866 | static int netvsc_register_vf(struct net_device *vf_netdev) |
1867 | { | |
0a1275ca VK |
1868 | struct net_device *ndev; |
1869 | struct net_device_context *net_device_ctx; | |
84bf9cef | 1870 | struct netvsc_device *netvsc_dev; |
84bf9cef | 1871 | |
e8ff40d4 SH |
1872 | if (vf_netdev->addr_len != ETH_ALEN) |
1873 | return NOTIFY_DONE; | |
1874 | ||
84bf9cef KS |
1875 | /* |
1876 | * We will use the MAC address to locate the synthetic interface to | |
1877 | * associate with the VF interface. If we don't find a matching | |
1878 | * synthetic interface, move on. | |
1879 | */ | |
e8ff40d4 | 1880 | ndev = get_netvsc_bymac(vf_netdev->perm_addr); |
0a1275ca VK |
1881 | if (!ndev) |
1882 | return NOTIFY_DONE; | |
1883 | ||
1884 | net_device_ctx = netdev_priv(ndev); | |
545a8e79 | 1885 | netvsc_dev = rtnl_dereference(net_device_ctx->nvdev); |
f207c10d | 1886 | if (!netvsc_dev || rtnl_dereference(net_device_ctx->vf_netdev)) |
84bf9cef KS |
1887 | return NOTIFY_DONE; |
1888 | ||
0c195567 | 1889 | if (netvsc_vf_join(vf_netdev, ndev) != 0) |
1890 | return NOTIFY_DONE; | |
1891 | ||
0a1275ca | 1892 | netdev_info(ndev, "VF registering: %s\n", vf_netdev->name); |
0c195567 | 1893 | |
07d0f000 | 1894 | dev_hold(vf_netdev); |
f207c10d | 1895 | rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev); |
84bf9cef KS |
1896 | return NOTIFY_OK; |
1897 | } | |
1898 | ||
9a0c48df SH |
1899 | /* VF up/down change detected, schedule to change data path */ |
1900 | static int netvsc_vf_changed(struct net_device *vf_netdev) | |
84bf9cef | 1901 | { |
7b83f520 | 1902 | struct net_device_context *net_device_ctx; |
84bf9cef | 1903 | struct netvsc_device *netvsc_dev; |
7b83f520 | 1904 | struct net_device *ndev; |
9a0c48df | 1905 | bool vf_is_up = netif_running(vf_netdev); |
fb84af8a | 1906 | |
7b83f520 | 1907 | ndev = get_netvsc_byref(vf_netdev); |
1908 | if (!ndev) | |
1909 | return NOTIFY_DONE; | |
0c195567 | 1910 | |
7b83f520 | 1911 | net_device_ctx = netdev_priv(ndev); |
1912 | netvsc_dev = rtnl_dereference(net_device_ctx->nvdev); | |
0c195567 | 1913 | if (!netvsc_dev) |
7b83f520 | 1914 | return NOTIFY_DONE; |
84bf9cef | 1915 | |
9a0c48df SH |
1916 | netvsc_switch_datapath(ndev, vf_is_up); |
1917 | netdev_info(ndev, "Data path switched %s VF: %s\n", | |
1918 | vf_is_up ? "to" : "from", vf_netdev->name); | |
84bf9cef KS |
1919 | |
1920 | return NOTIFY_OK; | |
1921 | } | |
1922 | ||
84bf9cef KS |
1923 | static int netvsc_unregister_vf(struct net_device *vf_netdev) |
1924 | { | |
0a1275ca | 1925 | struct net_device *ndev; |
0a1275ca | 1926 | struct net_device_context *net_device_ctx; |
84bf9cef | 1927 | |
e8ff40d4 | 1928 | ndev = get_netvsc_byref(vf_netdev); |
0a1275ca VK |
1929 | if (!ndev) |
1930 | return NOTIFY_DONE; | |
1931 | ||
1932 | net_device_ctx = netdev_priv(ndev); | |
6123c668 | 1933 | cancel_delayed_work_sync(&net_device_ctx->vf_takeover); |
e8ff40d4 | 1934 | |
0a1275ca | 1935 | netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); |
f207c10d | 1936 | |
ec158f77 | 1937 | netdev_rx_handler_unregister(vf_netdev); |
0c195567 | 1938 | netdev_upper_dev_unlink(vf_netdev, ndev); |
f207c10d | 1939 | RCU_INIT_POINTER(net_device_ctx->vf_netdev, NULL); |
07d0f000 | 1940 | dev_put(vf_netdev); |
ec158f77 | 1941 | |
84bf9cef KS |
1942 | return NOTIFY_OK; |
1943 | } | |
1944 | ||
84946899 S |
1945 | static int netvsc_probe(struct hv_device *dev, |
1946 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 1947 | { |
df2fff28 GKH |
1948 | struct net_device *net = NULL; |
1949 | struct net_device_context *net_device_ctx; | |
1950 | struct netvsc_device_info device_info; | |
5b54dac8 | 1951 | struct netvsc_device *nvdev; |
0c195567 | 1952 | int ret = -ENOMEM; |
df2fff28 | 1953 | |
5b54dac8 | 1954 | net = alloc_etherdev_mq(sizeof(struct net_device_context), |
2b01888d | 1955 | VRSS_CHANNEL_MAX); |
df2fff28 | 1956 | if (!net) |
0c195567 | 1957 | goto no_net; |
df2fff28 | 1958 | |
1b07da51 HZ |
1959 | netif_carrier_off(net); |
1960 | ||
b37879e6 HZ |
1961 | netvsc_init_settings(net); |
1962 | ||
df2fff28 | 1963 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 1964 | net_device_ctx->device_ctx = dev; |
3f300ff4 SX |
1965 | net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); |
1966 | if (netif_msg_probe(net_device_ctx)) | |
1967 | netdev_dbg(net, "netvsc msg_enable: %d\n", | |
1968 | net_device_ctx->msg_enable); | |
1969 | ||
2ddd5e5f | 1970 | hv_set_drvdata(dev, net); |
f580aec4 | 1971 | |
891de74d | 1972 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
df2fff28 | 1973 | |
27a70af3 VK |
1974 | spin_lock_init(&net_device_ctx->lock); |
1975 | INIT_LIST_HEAD(&net_device_ctx->reconfig_events); | |
6123c668 | 1976 | INIT_DELAYED_WORK(&net_device_ctx->vf_takeover, netvsc_vf_setup); |
0c195567 | 1977 | |
1978 | net_device_ctx->vf_stats | |
1979 | = netdev_alloc_pcpu_stats(struct netvsc_vf_pcpu_stats); | |
1980 | if (!net_device_ctx->vf_stats) | |
1981 | goto no_stats; | |
27a70af3 | 1982 | |
df2fff28 | 1983 | net->netdev_ops = &device_ops; |
7ad24ea4 | 1984 | net->ethtool_ops = ðtool_ops; |
9efd21e1 | 1985 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 1986 | |
14a03cf8 VK |
1987 | /* We always need headroom for rndis header */ |
1988 | net->needed_headroom = RNDIS_AND_PPI_SIZE; | |
1989 | ||
6450f8f2 HZ |
1990 | /* Initialize the number of queues to be 1, we may change it if more |
1991 | * channels are offered later. | |
1992 | */ | |
1993 | netif_set_real_num_tx_queues(net, 1); | |
1994 | netif_set_real_num_rx_queues(net, 1); | |
1995 | ||
692e084e | 1996 | /* Notify the netvsc driver of the new device */ |
8ebdcc52 | 1997 | memset(&device_info, 0, sizeof(device_info)); |
692e084e | 1998 | device_info.ring_size = ring_size; |
3071ada4 | 1999 | device_info.num_chn = VRSS_CHANNEL_DEFAULT; |
8b532797 | 2000 | device_info.send_sections = NETVSC_DEFAULT_TX; |
0ab09bef | 2001 | device_info.send_section_size = NETVSC_SEND_SECTION_SIZE; |
8b532797 | 2002 | device_info.recv_sections = NETVSC_DEFAULT_RX; |
0ab09bef | 2003 | device_info.recv_section_size = NETVSC_RECV_SECTION_SIZE; |
9749fed5 | 2004 | |
2005 | nvdev = rndis_filter_device_add(dev, &device_info); | |
2006 | if (IS_ERR(nvdev)) { | |
2007 | ret = PTR_ERR(nvdev); | |
692e084e | 2008 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); |
0c195567 | 2009 | goto rndis_failed; |
df2fff28 | 2010 | } |
0c195567 | 2011 | |
692e084e HZ |
2012 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
2013 | ||
23312a3b | 2014 | /* hw_features computed in rndis_filter_device_add */ |
2015 | net->features = net->hw_features | | |
2016 | NETIF_F_HIGHDMA | NETIF_F_SG | | |
2017 | NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; | |
2018 | net->vlan_features = net->features; | |
2019 | ||
9749fed5 | 2020 | netdev_lockdep_set_classes(net); |
2021 | ||
d0c2c997 JW |
2022 | /* MTU range: 68 - 1500 or 65521 */ |
2023 | net->min_mtu = NETVSC_MTU_MIN; | |
2024 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) | |
2025 | net->max_mtu = NETVSC_MTU - ETH_HLEN; | |
2026 | else | |
2027 | net->max_mtu = ETH_DATA_LEN; | |
2028 | ||
a68f9614 HZ |
2029 | ret = register_netdev(net); |
2030 | if (ret != 0) { | |
2031 | pr_err("Unable to register netdev.\n"); | |
0c195567 | 2032 | goto register_failed; |
a68f9614 HZ |
2033 | } |
2034 | ||
df2fff28 | 2035 | return ret; |
0c195567 | 2036 | |
2037 | register_failed: | |
2038 | rndis_filter_device_remove(dev, nvdev); | |
2039 | rndis_failed: | |
2040 | free_percpu(net_device_ctx->vf_stats); | |
2041 | no_stats: | |
2042 | hv_set_drvdata(dev, NULL); | |
2043 | free_netdev(net); | |
2044 | no_net: | |
2045 | return ret; | |
df2fff28 GKH |
2046 | } |
2047 | ||
415b023a | 2048 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 2049 | { |
122a5f64 | 2050 | struct net_device_context *ndev_ctx; |
ec158f77 SH |
2051 | struct net_device *vf_netdev; |
2052 | struct net_device *net; | |
2ddd5e5f | 2053 | |
3d541ac5 | 2054 | net = hv_get_drvdata(dev); |
df2fff28 | 2055 | if (net == NULL) { |
415b023a | 2056 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
2057 | return 0; |
2058 | } | |
2059 | ||
122a5f64 | 2060 | ndev_ctx = netdev_priv(net); |
3d541ac5 | 2061 | |
a0be450e | 2062 | netif_device_detach(net); |
f580aec4 | 2063 | |
122a5f64 HZ |
2064 | cancel_delayed_work_sync(&ndev_ctx->dwork); |
2065 | ||
df2fff28 GKH |
2066 | /* |
2067 | * Call to the vsc driver to let it know that the device is being | |
a0be450e | 2068 | * removed. Also blocks mtu and channel changes. |
df2fff28 | 2069 | */ |
a0be450e | 2070 | rtnl_lock(); |
ec158f77 SH |
2071 | vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); |
2072 | if (vf_netdev) | |
2073 | netvsc_unregister_vf(vf_netdev); | |
2074 | ||
8195b139 SH |
2075 | unregister_netdevice(net); |
2076 | ||
79e8cbe7 | 2077 | rndis_filter_device_remove(dev, |
2078 | rtnl_dereference(ndev_ctx->nvdev)); | |
a0be450e | 2079 | rtnl_unlock(); |
2080 | ||
3d541ac5 VK |
2081 | hv_set_drvdata(dev, NULL); |
2082 | ||
0c195567 | 2083 | free_percpu(ndev_ctx->vf_stats); |
6c80f3fc | 2084 | free_netdev(net); |
df06bcff | 2085 | return 0; |
df2fff28 GKH |
2086 | } |
2087 | ||
345c4cc3 | 2088 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 2089 | /* Network guid */ |
8f505944 | 2090 | { HV_NIC_GUID, }, |
c45cf2d4 | 2091 | { }, |
345c4cc3 S |
2092 | }; |
2093 | ||
2094 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
2095 | ||
f1542a66 | 2096 | /* The one and only one */ |
fde0ef9b | 2097 | static struct hv_driver netvsc_drv = { |
d31b20fc | 2098 | .name = KBUILD_MODNAME, |
345c4cc3 | 2099 | .id_table = id_table, |
fde0ef9b S |
2100 | .probe = netvsc_probe, |
2101 | .remove = netvsc_remove, | |
d4890970 | 2102 | }; |
f1542a66 | 2103 | |
84bf9cef KS |
2104 | /* |
2105 | * On Hyper-V, every VF interface is matched with a corresponding | |
2106 | * synthetic interface. The synthetic interface is presented first | |
2107 | * to the guest. When the corresponding VF instance is registered, | |
2108 | * we will take care of switching the data path. | |
2109 | */ | |
2110 | static int netvsc_netdev_event(struct notifier_block *this, | |
2111 | unsigned long event, void *ptr) | |
2112 | { | |
2113 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); | |
2114 | ||
ee837a13 SH |
2115 | /* Skip our own events */ |
2116 | if (event_dev->netdev_ops == &device_ops) | |
2117 | return NOTIFY_DONE; | |
2118 | ||
2119 | /* Avoid non-Ethernet type devices */ | |
2120 | if (event_dev->type != ARPHRD_ETHER) | |
2121 | return NOTIFY_DONE; | |
2122 | ||
0dbff144 | 2123 | /* Avoid Vlan dev with same MAC registering as VF */ |
d0d7b10b | 2124 | if (is_vlan_dev(event_dev)) |
0dbff144 VK |
2125 | return NOTIFY_DONE; |
2126 | ||
2127 | /* Avoid Bonding master dev with same MAC registering as VF */ | |
ee837a13 SH |
2128 | if ((event_dev->priv_flags & IFF_BONDING) && |
2129 | (event_dev->flags & IFF_MASTER)) | |
cb2911fe HZ |
2130 | return NOTIFY_DONE; |
2131 | ||
84bf9cef KS |
2132 | switch (event) { |
2133 | case NETDEV_REGISTER: | |
2134 | return netvsc_register_vf(event_dev); | |
2135 | case NETDEV_UNREGISTER: | |
2136 | return netvsc_unregister_vf(event_dev); | |
2137 | case NETDEV_UP: | |
84bf9cef | 2138 | case NETDEV_DOWN: |
9a0c48df | 2139 | return netvsc_vf_changed(event_dev); |
84bf9cef KS |
2140 | default: |
2141 | return NOTIFY_DONE; | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | static struct notifier_block netvsc_netdev_notifier = { | |
2146 | .notifier_call = netvsc_netdev_event, | |
2147 | }; | |
2148 | ||
a9869c94 | 2149 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 2150 | { |
84bf9cef | 2151 | unregister_netdevice_notifier(&netvsc_netdev_notifier); |
768fa219 | 2152 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
2153 | } |
2154 | ||
1fde28cf | 2155 | static int __init netvsc_drv_init(void) |
df2fff28 | 2156 | { |
84bf9cef KS |
2157 | int ret; |
2158 | ||
fa85a6c2 HZ |
2159 | if (ring_size < RING_SIZE_MIN) { |
2160 | ring_size = RING_SIZE_MIN; | |
2161 | pr_info("Increased ring_size to %d (min allowed)\n", | |
2162 | ring_size); | |
2163 | } | |
84bf9cef KS |
2164 | ret = vmbus_driver_register(&netvsc_drv); |
2165 | ||
2166 | if (ret) | |
2167 | return ret; | |
2168 | ||
2169 | register_netdevice_notifier(&netvsc_netdev_notifier); | |
2170 | return 0; | |
df2fff28 GKH |
2171 | } |
2172 | ||
26c14cc1 | 2173 | MODULE_LICENSE("GPL"); |
7880fc54 | 2174 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 2175 | |
1fde28cf | 2176 | module_init(netvsc_drv_init); |
a9869c94 | 2177 | module_exit(netvsc_drv_exit); |