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Commit | Line | Data |
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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> |
fceaf24a HJ |
36 | #include <net/arp.h> |
37 | #include <net/route.h> | |
38 | #include <net/sock.h> | |
39 | #include <net/pkt_sched.h> | |
3f335ea2 | 40 | |
5ca7252a | 41 | #include "hyperv_net.h" |
fceaf24a | 42 | |
fa85a6c2 | 43 | #define RING_SIZE_MIN 64 |
27a70af3 | 44 | #define LINKCHANGE_INT (2 * HZ) |
a50af86d | 45 | |
99c8da0f | 46 | static int ring_size = 128; |
450d7a4b SH |
47 | module_param(ring_size, int, S_IRUGO); |
48 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); | |
fceaf24a | 49 | |
3f300ff4 SX |
50 | static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | |
51 | NETIF_MSG_LINK | NETIF_MSG_IFUP | | |
52 | NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | | |
53 | NETIF_MSG_TX_ERR; | |
54 | ||
55 | static int debug = -1; | |
56 | module_param(debug, int, S_IRUGO); | |
57 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
58 | ||
d426b2e3 HZ |
59 | static void do_set_multicast(struct work_struct *w) |
60 | { | |
792df872 WM |
61 | struct net_device_context *ndevctx = |
62 | container_of(w, struct net_device_context, work); | |
0a1275ca VK |
63 | struct hv_device *device_obj = ndevctx->device_ctx; |
64 | struct net_device *ndev = hv_get_drvdata(device_obj); | |
545a8e79 | 65 | struct netvsc_device *nvdev = rcu_dereference(ndevctx->nvdev); |
d426b2e3 HZ |
66 | struct rndis_device *rdev; |
67 | ||
0a1275ca | 68 | if (!nvdev) |
792df872 | 69 | return; |
d426b2e3 HZ |
70 | |
71 | rdev = nvdev->extension; | |
72 | if (rdev == NULL) | |
792df872 | 73 | return; |
d426b2e3 | 74 | |
0a1275ca | 75 | if (ndev->flags & IFF_PROMISC) |
d426b2e3 HZ |
76 | rndis_filter_set_packet_filter(rdev, |
77 | NDIS_PACKET_TYPE_PROMISCUOUS); | |
78 | else | |
79 | rndis_filter_set_packet_filter(rdev, | |
80 | NDIS_PACKET_TYPE_BROADCAST | | |
81 | NDIS_PACKET_TYPE_ALL_MULTICAST | | |
82 | NDIS_PACKET_TYPE_DIRECTED); | |
d426b2e3 HZ |
83 | } |
84 | ||
4e9bfefa | 85 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a | 86 | { |
792df872 | 87 | struct net_device_context *net_device_ctx = netdev_priv(net); |
d426b2e3 | 88 | |
792df872 | 89 | schedule_work(&net_device_ctx->work); |
fceaf24a HJ |
90 | } |
91 | ||
fceaf24a HJ |
92 | static int netvsc_open(struct net_device *net) |
93 | { | |
2f5fa6c8 | 94 | struct netvsc_device *nvdev = net_device_to_netvsc_device(net); |
891de74d | 95 | struct rndis_device *rdev; |
02fafbc6 | 96 | int ret = 0; |
fceaf24a | 97 | |
891de74d HZ |
98 | netif_carrier_off(net); |
99 | ||
d515d0ff | 100 | /* Open up the device */ |
2f5fa6c8 | 101 | ret = rndis_filter_open(nvdev); |
d515d0ff HZ |
102 | if (ret != 0) { |
103 | netdev_err(net, "unable to open device (ret %d).\n", ret); | |
104 | return ret; | |
fceaf24a HJ |
105 | } |
106 | ||
2de8530b | 107 | netif_tx_wake_all_queues(net); |
d515d0ff | 108 | |
891de74d HZ |
109 | rdev = nvdev->extension; |
110 | if (!rdev->link_state) | |
111 | netif_carrier_on(net); | |
112 | ||
fceaf24a HJ |
113 | return ret; |
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); |
545a8e79 | 119 | struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
02fafbc6 | 120 | int ret; |
2de8530b HZ |
121 | u32 aread, awrite, i, msec = 10, retry = 0, retry_max = 20; |
122 | struct vmbus_channel *chn; | |
fceaf24a | 123 | |
0a282538 | 124 | netif_tx_disable(net); |
fceaf24a | 125 | |
792df872 WM |
126 | /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */ |
127 | cancel_work_sync(&net_device_ctx->work); | |
2f5fa6c8 | 128 | ret = rndis_filter_close(nvdev); |
2de8530b | 129 | if (ret != 0) { |
eb335bc4 | 130 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
2de8530b HZ |
131 | return ret; |
132 | } | |
133 | ||
134 | /* Ensure pending bytes in ring are read */ | |
135 | while (true) { | |
136 | aread = 0; | |
137 | for (i = 0; i < nvdev->num_chn; i++) { | |
b8b835a8 | 138 | chn = nvdev->chan_table[i].channel; |
2de8530b HZ |
139 | if (!chn) |
140 | continue; | |
141 | ||
142 | hv_get_ringbuffer_availbytes(&chn->inbound, &aread, | |
143 | &awrite); | |
144 | ||
145 | if (aread) | |
146 | break; | |
147 | ||
148 | hv_get_ringbuffer_availbytes(&chn->outbound, &aread, | |
149 | &awrite); | |
150 | ||
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 | |
fceaf24a HJ |
170 | return ret; |
171 | } | |
172 | ||
8a00251a KS |
173 | static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size, |
174 | int pkt_type) | |
175 | { | |
176 | struct rndis_packet *rndis_pkt; | |
177 | struct rndis_per_packet_info *ppi; | |
178 | ||
179 | rndis_pkt = &msg->msg.pkt; | |
180 | rndis_pkt->data_offset += ppi_size; | |
181 | ||
182 | ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt + | |
183 | rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len); | |
184 | ||
185 | ppi->size = ppi_size; | |
186 | ppi->type = pkt_type; | |
187 | ppi->ppi_offset = sizeof(struct rndis_per_packet_info); | |
188 | ||
189 | rndis_pkt->per_pkt_info_len += ppi_size; | |
190 | ||
191 | return ppi; | |
192 | } | |
193 | ||
f72860af HZ |
194 | /* Azure hosts don't support non-TCP port numbers in hashing yet. We compute |
195 | * hash for non-TCP traffic with only IP numbers. | |
196 | */ | |
197 | static inline u32 netvsc_get_hash(struct sk_buff *skb, struct sock *sk) | |
198 | { | |
199 | struct flow_keys flow; | |
200 | u32 hash; | |
201 | static u32 hashrnd __read_mostly; | |
202 | ||
203 | net_get_random_once(&hashrnd, sizeof(hashrnd)); | |
204 | ||
205 | if (!skb_flow_dissect_flow_keys(skb, &flow, 0)) | |
206 | return 0; | |
207 | ||
208 | if (flow.basic.ip_proto == IPPROTO_TCP) { | |
209 | return skb_get_hash(skb); | |
210 | } else { | |
211 | if (flow.basic.n_proto == htons(ETH_P_IP)) | |
212 | hash = jhash2((u32 *)&flow.addrs.v4addrs, 2, hashrnd); | |
213 | else if (flow.basic.n_proto == htons(ETH_P_IPV6)) | |
214 | hash = jhash2((u32 *)&flow.addrs.v6addrs, 8, hashrnd); | |
215 | else | |
216 | hash = 0; | |
217 | ||
218 | skb_set_hash(skb, hash, PKT_HASH_TYPE_L3); | |
219 | } | |
220 | ||
221 | return hash; | |
222 | } | |
223 | ||
8db91f6a HZ |
224 | static inline int netvsc_get_tx_queue(struct net_device *ndev, |
225 | struct sk_buff *skb, int old_idx) | |
226 | { | |
227 | const struct net_device_context *ndc = netdev_priv(ndev); | |
228 | struct sock *sk = skb->sk; | |
229 | int q_idx; | |
230 | ||
f72860af | 231 | q_idx = ndc->tx_send_table[netvsc_get_hash(skb, sk) & |
8db91f6a HZ |
232 | (VRSS_SEND_TAB_SIZE - 1)]; |
233 | ||
234 | /* If queue index changed record the new value */ | |
235 | if (q_idx != old_idx && | |
236 | sk && sk_fullsock(sk) && rcu_access_pointer(sk->sk_dst_cache)) | |
237 | sk_tx_queue_set(sk, q_idx); | |
238 | ||
239 | return q_idx; | |
240 | } | |
241 | ||
d8e18ee0 | 242 | /* |
243 | * Select queue for transmit. | |
244 | * | |
245 | * If a valid queue has already been assigned, then use that. | |
246 | * Otherwise compute tx queue based on hash and the send table. | |
247 | * | |
248 | * This is basically similar to default (__netdev_pick_tx) with the added step | |
249 | * of using the host send_table when no other queue has been assigned. | |
250 | * | |
251 | * TODO support XPS - but get_xps_queue not exported | |
252 | */ | |
5b54dac8 HZ |
253 | static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, |
254 | void *accel_priv, select_queue_fallback_t fallback) | |
255 | { | |
7ce10124 | 256 | unsigned int num_tx_queues = ndev->real_num_tx_queues; |
8db91f6a HZ |
257 | int q_idx = sk_tx_queue_get(skb->sk); |
258 | ||
259 | if (q_idx < 0 || skb->ooo_okay) { | |
260 | /* If forwarding a packet, we use the recorded queue when | |
261 | * available for better cache locality. | |
262 | */ | |
263 | if (skb_rx_queue_recorded(skb)) | |
264 | q_idx = skb_get_rx_queue(skb); | |
265 | else | |
266 | q_idx = netvsc_get_tx_queue(ndev, skb, q_idx); | |
d8e18ee0 | 267 | } |
5b54dac8 | 268 | |
8db91f6a HZ |
269 | while (unlikely(q_idx >= num_tx_queues)) |
270 | q_idx -= num_tx_queues; | |
271 | ||
5b54dac8 HZ |
272 | return q_idx; |
273 | } | |
274 | ||
54a7357f KS |
275 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
276 | struct hv_page_buffer *pb) | |
277 | { | |
278 | int j = 0; | |
279 | ||
280 | /* Deal with compund pages by ignoring unused part | |
281 | * of the page. | |
282 | */ | |
283 | page += (offset >> PAGE_SHIFT); | |
284 | offset &= ~PAGE_MASK; | |
285 | ||
286 | while (len > 0) { | |
287 | unsigned long bytes; | |
288 | ||
289 | bytes = PAGE_SIZE - offset; | |
290 | if (bytes > len) | |
291 | bytes = len; | |
292 | pb[j].pfn = page_to_pfn(page); | |
293 | pb[j].offset = offset; | |
294 | pb[j].len = bytes; | |
295 | ||
296 | offset += bytes; | |
297 | len -= bytes; | |
298 | ||
299 | if (offset == PAGE_SIZE && len) { | |
300 | page++; | |
301 | offset = 0; | |
302 | j++; | |
303 | } | |
304 | } | |
305 | ||
306 | return j + 1; | |
307 | } | |
308 | ||
8a00251a | 309 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
a9f2e2d6 KS |
310 | struct hv_netvsc_packet *packet, |
311 | struct hv_page_buffer **page_buf) | |
54a7357f | 312 | { |
a9f2e2d6 | 313 | struct hv_page_buffer *pb = *page_buf; |
54a7357f KS |
314 | u32 slots_used = 0; |
315 | char *data = skb->data; | |
316 | int frags = skb_shinfo(skb)->nr_frags; | |
317 | int i; | |
318 | ||
319 | /* The packet is laid out thus: | |
aa0a34be | 320 | * 1. hdr: RNDIS header and PPI |
54a7357f KS |
321 | * 2. skb linear data |
322 | * 3. skb fragment data | |
323 | */ | |
324 | if (hdr != NULL) | |
325 | slots_used += fill_pg_buf(virt_to_page(hdr), | |
326 | offset_in_page(hdr), | |
327 | len, &pb[slots_used]); | |
328 | ||
aa0a34be HZ |
329 | packet->rmsg_size = len; |
330 | packet->rmsg_pgcnt = slots_used; | |
331 | ||
54a7357f KS |
332 | slots_used += fill_pg_buf(virt_to_page(data), |
333 | offset_in_page(data), | |
334 | skb_headlen(skb), &pb[slots_used]); | |
335 | ||
336 | for (i = 0; i < frags; i++) { | |
337 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
338 | ||
339 | slots_used += fill_pg_buf(skb_frag_page(frag), | |
340 | frag->page_offset, | |
341 | skb_frag_size(frag), &pb[slots_used]); | |
342 | } | |
8a00251a | 343 | return slots_used; |
54a7357f KS |
344 | } |
345 | ||
346 | static int count_skb_frag_slots(struct sk_buff *skb) | |
347 | { | |
348 | int i, frags = skb_shinfo(skb)->nr_frags; | |
349 | int pages = 0; | |
350 | ||
351 | for (i = 0; i < frags; i++) { | |
352 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
353 | unsigned long size = skb_frag_size(frag); | |
354 | unsigned long offset = frag->page_offset; | |
355 | ||
356 | /* Skip unused frames from start of page */ | |
357 | offset &= ~PAGE_MASK; | |
358 | pages += PFN_UP(offset + size); | |
359 | } | |
360 | return pages; | |
361 | } | |
362 | ||
363 | static int netvsc_get_slots(struct sk_buff *skb) | |
364 | { | |
365 | char *data = skb->data; | |
366 | unsigned int offset = offset_in_page(data); | |
367 | unsigned int len = skb_headlen(skb); | |
368 | int slots; | |
369 | int frag_slots; | |
370 | ||
371 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); | |
372 | frag_slots = count_skb_frag_slots(skb); | |
373 | return slots + frag_slots; | |
374 | } | |
375 | ||
23312a3b | 376 | static u32 net_checksum_info(struct sk_buff *skb) |
08cd04bf | 377 | { |
23312a3b | 378 | if (skb->protocol == htons(ETH_P_IP)) { |
379 | struct iphdr *ip = ip_hdr(skb); | |
08cd04bf | 380 | |
23312a3b | 381 | if (ip->protocol == IPPROTO_TCP) |
382 | return TRANSPORT_INFO_IPV4_TCP; | |
383 | else if (ip->protocol == IPPROTO_UDP) | |
384 | return TRANSPORT_INFO_IPV4_UDP; | |
08cd04bf | 385 | } else { |
23312a3b | 386 | struct ipv6hdr *ip6 = ipv6_hdr(skb); |
387 | ||
388 | if (ip6->nexthdr == IPPROTO_TCP) | |
389 | return TRANSPORT_INFO_IPV6_TCP; | |
08cd04bf | 390 | else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) |
23312a3b | 391 | return TRANSPORT_INFO_IPV6_UDP; |
08cd04bf KS |
392 | } |
393 | ||
23312a3b | 394 | return TRANSPORT_INFO_NOT_IP; |
08cd04bf KS |
395 | } |
396 | ||
02fafbc6 | 397 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 398 | { |
fceaf24a | 399 | struct net_device_context *net_device_ctx = netdev_priv(net); |
981a1bd8 | 400 | struct hv_netvsc_packet *packet = NULL; |
02fafbc6 | 401 | int ret; |
8a00251a KS |
402 | unsigned int num_data_pgs; |
403 | struct rndis_message *rndis_msg; | |
404 | struct rndis_packet *rndis_pkt; | |
405 | u32 rndis_msg_size; | |
8a00251a | 406 | struct rndis_per_packet_info *ppi; |
307f0995 | 407 | u32 hash; |
b08cc791 | 408 | struct hv_page_buffer page_buf[MAX_PAGE_BUFFER_COUNT]; |
a9f2e2d6 | 409 | struct hv_page_buffer *pb = page_buf; |
fceaf24a | 410 | |
54a7357f KS |
411 | /* We will atmost need two pages to describe the rndis |
412 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number | |
e88f7e07 VK |
413 | * of pages in a single packet. If skb is scattered around |
414 | * more pages we try linearizing it. | |
54a7357f | 415 | */ |
e88f7e07 | 416 | |
8a00251a | 417 | num_data_pgs = netvsc_get_slots(skb) + 2; |
0ab05141 SH |
418 | |
419 | if (unlikely(num_data_pgs > MAX_PAGE_BUFFER_COUNT)) { | |
4323b47c SH |
420 | ++net_device_ctx->eth_stats.tx_scattered; |
421 | ||
422 | if (skb_linearize(skb)) | |
423 | goto no_memory; | |
0ab05141 SH |
424 | |
425 | num_data_pgs = netvsc_get_slots(skb) + 2; | |
426 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { | |
4323b47c | 427 | ++net_device_ctx->eth_stats.tx_too_big; |
0ab05141 SH |
428 | goto drop; |
429 | } | |
54a7357f | 430 | } |
fceaf24a | 431 | |
c0eb4540 KS |
432 | /* |
433 | * Place the rndis header in the skb head room and | |
434 | * the skb->cb will be used for hv_netvsc_packet | |
435 | * structure. | |
436 | */ | |
437 | ret = skb_cow_head(skb, RNDIS_AND_PPI_SIZE); | |
4323b47c SH |
438 | if (ret) |
439 | goto no_memory; | |
440 | ||
c0eb4540 KS |
441 | /* Use the skb control buffer for building up the packet */ |
442 | BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) > | |
443 | FIELD_SIZEOF(struct sk_buff, cb)); | |
444 | packet = (struct hv_netvsc_packet *)skb->cb; | |
fceaf24a | 445 | |
5b54dac8 HZ |
446 | packet->q_idx = skb_get_queue_mapping(skb); |
447 | ||
4d447c9a | 448 | packet->total_data_buflen = skb->len; |
793e3955 | 449 | packet->total_bytes = skb->len; |
450 | packet->total_packets = 1; | |
fceaf24a | 451 | |
c0eb4540 | 452 | rndis_msg = (struct rndis_message *)skb->head; |
b08cc791 | 453 | |
24476760 | 454 | memset(rndis_msg, 0, RNDIS_AND_PPI_SIZE); |
fceaf24a | 455 | |
8a00251a | 456 | /* Add the rndis header */ |
8a00251a KS |
457 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; |
458 | rndis_msg->msg_len = packet->total_data_buflen; | |
459 | rndis_pkt = &rndis_msg->msg.pkt; | |
460 | rndis_pkt->data_offset = sizeof(struct rndis_packet); | |
461 | rndis_pkt->data_len = packet->total_data_buflen; | |
462 | rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); | |
463 | ||
464 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); | |
465 | ||
307f0995 HZ |
466 | hash = skb_get_hash_raw(skb); |
467 | if (hash != 0 && net->real_num_tx_queues > 1) { | |
468 | rndis_msg_size += NDIS_HASH_PPI_SIZE; | |
469 | ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE, | |
470 | NBL_HASH_VALUE); | |
471 | *(u32 *)((void *)ppi + ppi->ppi_offset) = hash; | |
472 | } | |
473 | ||
0ab05141 | 474 | if (skb_vlan_tag_present(skb)) { |
8a00251a KS |
475 | struct ndis_pkt_8021q_info *vlan; |
476 | ||
477 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; | |
478 | ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, | |
479 | IEEE_8021Q_INFO); | |
480 | vlan = (struct ndis_pkt_8021q_info *)((void *)ppi + | |
481 | ppi->ppi_offset); | |
760d1e36 KS |
482 | vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK; |
483 | vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >> | |
8a00251a KS |
484 | VLAN_PRIO_SHIFT; |
485 | } | |
486 | ||
23312a3b | 487 | if (skb_is_gso(skb)) { |
0ab05141 SH |
488 | struct ndis_tcp_lso_info *lso_info; |
489 | ||
490 | rndis_msg_size += NDIS_LSO_PPI_SIZE; | |
491 | ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, | |
492 | TCP_LARGESEND_PKTINFO); | |
493 | ||
494 | lso_info = (struct ndis_tcp_lso_info *)((void *)ppi + | |
495 | ppi->ppi_offset); | |
496 | ||
497 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; | |
23312a3b | 498 | if (skb->protocol == htons(ETH_P_IP)) { |
0ab05141 SH |
499 | lso_info->lso_v2_transmit.ip_version = |
500 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; | |
501 | ip_hdr(skb)->tot_len = 0; | |
502 | ip_hdr(skb)->check = 0; | |
503 | tcp_hdr(skb)->check = | |
504 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
505 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
506 | } else { | |
507 | lso_info->lso_v2_transmit.ip_version = | |
508 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; | |
509 | ipv6_hdr(skb)->payload_len = 0; | |
510 | tcp_hdr(skb)->check = | |
511 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
512 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
513 | } | |
23312a3b | 514 | lso_info->lso_v2_transmit.tcp_header_offset = skb_transport_offset(skb); |
0ab05141 | 515 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; |
ad19bc8a | 516 | } else if (skb->ip_summed == CHECKSUM_PARTIAL) { |
23312a3b | 517 | if (net_checksum_info(skb) & net_device_ctx->tx_checksum_mask) { |
518 | struct ndis_tcp_ip_checksum_info *csum_info; | |
519 | ||
ad19bc8a | 520 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; |
521 | ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, | |
522 | TCPIP_CHKSUM_PKTINFO); | |
523 | ||
524 | csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + | |
525 | ppi->ppi_offset); | |
526 | ||
23312a3b | 527 | csum_info->transmit.tcp_header_offset = skb_transport_offset(skb); |
528 | ||
529 | if (skb->protocol == htons(ETH_P_IP)) { | |
ad19bc8a | 530 | csum_info->transmit.is_ipv4 = 1; |
23312a3b | 531 | |
532 | if (ip_hdr(skb)->protocol == IPPROTO_TCP) | |
533 | csum_info->transmit.tcp_checksum = 1; | |
534 | else | |
535 | csum_info->transmit.udp_checksum = 1; | |
536 | } else { | |
ad19bc8a | 537 | csum_info->transmit.is_ipv6 = 1; |
538 | ||
23312a3b | 539 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
540 | csum_info->transmit.tcp_checksum = 1; | |
541 | else | |
542 | csum_info->transmit.udp_checksum = 1; | |
543 | } | |
ad19bc8a | 544 | } else { |
23312a3b | 545 | /* Can't do offload of this type of checksum */ |
ad19bc8a | 546 | if (skb_checksum_help(skb)) |
547 | goto drop; | |
548 | } | |
08cd04bf KS |
549 | } |
550 | ||
8a00251a KS |
551 | /* Start filling in the page buffers with the rndis hdr */ |
552 | rndis_msg->msg_len += rndis_msg_size; | |
942396b0 | 553 | packet->total_data_buflen = rndis_msg->msg_len; |
8a00251a | 554 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, |
a9f2e2d6 | 555 | skb, packet, &pb); |
8a00251a | 556 | |
76d13b56 | 557 | /* timestamp packet in software */ |
558 | skb_tx_timestamp(skb); | |
3a3d9a0a KS |
559 | ret = netvsc_send(net_device_ctx->device_ctx, packet, |
560 | rndis_msg, &pb, skb); | |
793e3955 | 561 | if (likely(ret == 0)) |
0ab05141 | 562 | return NETDEV_TX_OK; |
4323b47c SH |
563 | |
564 | if (ret == -EAGAIN) { | |
565 | ++net_device_ctx->eth_stats.tx_busy; | |
0ab05141 | 566 | return NETDEV_TX_BUSY; |
4323b47c SH |
567 | } |
568 | ||
569 | if (ret == -ENOSPC) | |
570 | ++net_device_ctx->eth_stats.tx_no_space; | |
0ab05141 SH |
571 | |
572 | drop: | |
573 | dev_kfree_skb_any(skb); | |
574 | net->stats.tx_dropped++; | |
fceaf24a | 575 | |
0ab05141 | 576 | return NETDEV_TX_OK; |
4323b47c SH |
577 | |
578 | no_memory: | |
579 | ++net_device_ctx->eth_stats.tx_no_memory; | |
580 | goto drop; | |
fceaf24a | 581 | } |
3e189519 | 582 | /* |
02fafbc6 GKH |
583 | * netvsc_linkstatus_callback - Link up/down notification |
584 | */ | |
90ef117a | 585 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
3a494e71 | 586 | struct rndis_message *resp) |
fceaf24a | 587 | { |
3a494e71 | 588 | struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
2ddd5e5f | 589 | struct net_device *net; |
c996edcf | 590 | struct net_device_context *ndev_ctx; |
27a70af3 VK |
591 | struct netvsc_reconfig *event; |
592 | unsigned long flags; | |
891de74d | 593 | |
7f5d5af0 HZ |
594 | net = hv_get_drvdata(device_obj); |
595 | ||
596 | if (!net) | |
597 | return; | |
598 | ||
599 | ndev_ctx = netdev_priv(net); | |
600 | ||
601 | /* Update the physical link speed when changing to another vSwitch */ | |
602 | if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) { | |
603 | u32 speed; | |
604 | ||
605 | speed = *(u32 *)((void *)indicate + indicate-> | |
606 | status_buf_offset) / 10000; | |
607 | ndev_ctx->speed = speed; | |
608 | return; | |
609 | } | |
610 | ||
611 | /* Handle these link change statuses below */ | |
27a70af3 VK |
612 | if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE && |
613 | indicate->status != RNDIS_STATUS_MEDIA_CONNECT && | |
614 | indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT) | |
3a494e71 | 615 | return; |
891de74d | 616 | |
7f5d5af0 | 617 | if (net->reg_state != NETREG_REGISTERED) |
fceaf24a | 618 | return; |
fceaf24a | 619 | |
27a70af3 VK |
620 | event = kzalloc(sizeof(*event), GFP_ATOMIC); |
621 | if (!event) | |
622 | return; | |
623 | event->event = indicate->status; | |
624 | ||
625 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
626 | list_add_tail(&event->list, &ndev_ctx->reconfig_events); | |
627 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
628 | ||
629 | schedule_delayed_work(&ndev_ctx->dwork, 0); | |
fceaf24a HJ |
630 | } |
631 | ||
84bf9cef | 632 | static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net, |
e91e7dd7 | 633 | struct napi_struct *napi, |
dc54a08c | 634 | const struct ndis_tcp_ip_checksum_info *csum_info, |
635 | const struct ndis_pkt_8021q_info *vlan, | |
636 | void *data, u32 buflen) | |
fceaf24a | 637 | { |
fceaf24a | 638 | struct sk_buff *skb; |
fceaf24a | 639 | |
e91e7dd7 | 640 | skb = napi_alloc_skb(napi, buflen); |
84bf9cef KS |
641 | if (!skb) |
642 | return skb; | |
fceaf24a | 643 | |
02fafbc6 GKH |
644 | /* |
645 | * Copy to skb. This copy is needed here since the memory pointed by | |
646 | * hv_netvsc_packet cannot be deallocated | |
647 | */ | |
dc54a08c | 648 | memcpy(skb_put(skb, buflen), data, buflen); |
fceaf24a HJ |
649 | |
650 | skb->protocol = eth_type_trans(skb, net); | |
e52fed71 SH |
651 | |
652 | /* skb is already created with CHECKSUM_NONE */ | |
653 | skb_checksum_none_assert(skb); | |
654 | ||
655 | /* | |
656 | * In Linux, the IP checksum is always checked. | |
657 | * Do L4 checksum offload if enabled and present. | |
658 | */ | |
659 | if (csum_info && (net->features & NETIF_F_RXCSUM)) { | |
660 | if (csum_info->receive.tcp_checksum_succeeded || | |
661 | csum_info->receive.udp_checksum_succeeded) | |
e3d605ed | 662 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
e3d605ed KS |
663 | } |
664 | ||
dc54a08c | 665 | if (vlan) { |
666 | u16 vlan_tci = vlan->vlanid | (vlan->pri << VLAN_PRIO_SHIFT); | |
667 | ||
93725cbd | 668 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
760d1e36 | 669 | vlan_tci); |
dc54a08c | 670 | } |
fceaf24a | 671 | |
84bf9cef KS |
672 | return skb; |
673 | } | |
674 | ||
675 | /* | |
676 | * netvsc_recv_callback - Callback when we receive a packet from the | |
677 | * "wire" on the specified device. | |
678 | */ | |
dc54a08c | 679 | int netvsc_recv_callback(struct net_device *net, |
680 | struct vmbus_channel *channel, | |
681 | void *data, u32 len, | |
682 | const struct ndis_tcp_ip_checksum_info *csum_info, | |
683 | const struct ndis_pkt_8021q_info *vlan) | |
84bf9cef | 684 | { |
3d541ac5 | 685 | struct net_device_context *net_device_ctx = netdev_priv(net); |
545a8e79 | 686 | struct netvsc_device *net_device; |
742fe54c | 687 | u16 q_idx = channel->offermsg.offer.sub_channel_index; |
545a8e79 | 688 | struct netvsc_channel *nvchan; |
f207c10d | 689 | struct net_device *vf_netdev; |
84bf9cef | 690 | struct sk_buff *skb; |
84bf9cef | 691 | struct netvsc_stats *rx_stats; |
84bf9cef | 692 | |
9cbcc428 | 693 | if (net->reg_state != NETREG_REGISTERED) |
84bf9cef KS |
694 | return NVSP_STAT_FAIL; |
695 | ||
9cbcc428 SH |
696 | /* |
697 | * If necessary, inject this packet into the VF interface. | |
698 | * On Hyper-V, multicast and brodcast packets are only delivered | |
699 | * to the synthetic interface (after subjecting these to | |
700 | * policy filters on the host). Deliver these via the VF | |
701 | * interface in the guest. | |
702 | */ | |
0719e72c | 703 | rcu_read_lock(); |
545a8e79 | 704 | net_device = rcu_dereference(net_device_ctx->nvdev); |
705 | if (unlikely(!net_device)) | |
706 | goto drop; | |
707 | ||
708 | nvchan = &net_device->chan_table[q_idx]; | |
f207c10d | 709 | vf_netdev = rcu_dereference(net_device_ctx->vf_netdev); |
9cbcc428 SH |
710 | if (vf_netdev && (vf_netdev->flags & IFF_UP)) |
711 | net = vf_netdev; | |
84bf9cef KS |
712 | |
713 | /* Allocate a skb - TODO direct I/O to pages? */ | |
e91e7dd7 | 714 | skb = netvsc_alloc_recv_skb(net, &nvchan->napi, |
715 | csum_info, vlan, data, len); | |
84bf9cef | 716 | if (unlikely(!skb)) { |
545a8e79 | 717 | drop: |
84bf9cef | 718 | ++net->stats.rx_dropped; |
0719e72c | 719 | rcu_read_unlock(); |
84bf9cef KS |
720 | return NVSP_STAT_FAIL; |
721 | } | |
5b54dac8 | 722 | |
9cbcc428 | 723 | if (net != vf_netdev) |
6c80f3fc | 724 | skb_record_rx_queue(skb, q_idx); |
9cbcc428 SH |
725 | |
726 | /* | |
727 | * Even if injecting the packet, record the statistics | |
728 | * on the synthetic device because modifying the VF device | |
729 | * statistics will not work correctly. | |
730 | */ | |
742fe54c | 731 | rx_stats = &nvchan->rx_stats; |
4b02b58b | 732 | u64_stats_update_begin(&rx_stats->syncp); |
7eafd9b4 | 733 | rx_stats->packets++; |
dc54a08c | 734 | rx_stats->bytes += len; |
f7ad75b7 SH |
735 | |
736 | if (skb->pkt_type == PACKET_BROADCAST) | |
737 | ++rx_stats->broadcast; | |
738 | else if (skb->pkt_type == PACKET_MULTICAST) | |
739 | ++rx_stats->multicast; | |
4b02b58b | 740 | u64_stats_update_end(&rx_stats->syncp); |
9495c282 | 741 | |
742fe54c | 742 | napi_gro_receive(&nvchan->napi, skb); |
0719e72c | 743 | rcu_read_unlock(); |
fceaf24a | 744 | |
fceaf24a HJ |
745 | return 0; |
746 | } | |
747 | ||
f82f4ad7 SH |
748 | static void netvsc_get_drvinfo(struct net_device *net, |
749 | struct ethtool_drvinfo *info) | |
750 | { | |
7826d43f | 751 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 752 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
f82f4ad7 SH |
753 | } |
754 | ||
59995370 AS |
755 | static void netvsc_get_channels(struct net_device *net, |
756 | struct ethtool_channels *channel) | |
757 | { | |
758 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
545a8e79 | 759 | struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
59995370 AS |
760 | |
761 | if (nvdev) { | |
762 | channel->max_combined = nvdev->max_chn; | |
763 | channel->combined_count = nvdev->num_chn; | |
764 | } | |
765 | } | |
766 | ||
2b01888d | 767 | static int netvsc_set_queues(struct net_device *net, struct hv_device *dev, |
768 | u32 num_chn) | |
769 | { | |
770 | struct netvsc_device_info device_info; | |
771 | int ret; | |
772 | ||
773 | memset(&device_info, 0, sizeof(device_info)); | |
774 | device_info.num_chn = num_chn; | |
775 | device_info.ring_size = ring_size; | |
776 | device_info.max_num_vrss_chns = num_chn; | |
777 | ||
778 | ret = rndis_filter_device_add(dev, &device_info); | |
779 | if (ret) | |
780 | return ret; | |
781 | ||
782 | ret = netif_set_real_num_tx_queues(net, num_chn); | |
783 | if (ret) | |
784 | return ret; | |
785 | ||
786 | ret = netif_set_real_num_rx_queues(net, num_chn); | |
787 | ||
788 | return ret; | |
789 | } | |
790 | ||
b5960e6e AS |
791 | static int netvsc_set_channels(struct net_device *net, |
792 | struct ethtool_channels *channels) | |
793 | { | |
794 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
795 | struct hv_device *dev = net_device_ctx->device_ctx; | |
545a8e79 | 796 | struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
2b01888d | 797 | unsigned int count = channels->combined_count; |
163891d7 | 798 | bool was_running; |
2b01888d | 799 | int ret; |
800 | ||
801 | /* We do not support separate count for rx, tx, or other */ | |
802 | if (count == 0 || | |
803 | channels->rx_count || channels->tx_count || channels->other_count) | |
804 | return -EINVAL; | |
805 | ||
806 | if (count > net->num_tx_queues || count > net->num_rx_queues) | |
807 | return -EINVAL; | |
b5960e6e | 808 | |
a0be450e | 809 | if (!nvdev || nvdev->destroy) |
b5960e6e AS |
810 | return -ENODEV; |
811 | ||
2b01888d | 812 | if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) |
b5960e6e | 813 | return -EINVAL; |
b5960e6e | 814 | |
2b01888d | 815 | if (count > nvdev->max_chn) |
b5960e6e AS |
816 | return -EINVAL; |
817 | ||
163891d7 | 818 | was_running = netif_running(net); |
819 | if (was_running) { | |
820 | ret = netvsc_close(net); | |
821 | if (ret) | |
822 | return ret; | |
823 | } | |
b5960e6e | 824 | |
2289f0aa | 825 | rndis_filter_device_remove(dev, nvdev); |
b5960e6e | 826 | |
2b01888d | 827 | ret = netvsc_set_queues(net, dev, count); |
828 | if (ret == 0) | |
829 | nvdev->num_chn = count; | |
830 | else | |
831 | netvsc_set_queues(net, dev, nvdev->num_chn); | |
b5960e6e | 832 | |
163891d7 | 833 | if (was_running) |
834 | ret = netvsc_open(net); | |
835 | ||
1bdcec8a VK |
836 | /* We may have missed link change notifications */ |
837 | schedule_delayed_work(&net_device_ctx->dwork, 0); | |
b5960e6e AS |
838 | |
839 | return ret; | |
b5960e6e AS |
840 | } |
841 | ||
5e8456fd PR |
842 | static bool |
843 | netvsc_validate_ethtool_ss_cmd(const struct ethtool_link_ksettings *cmd) | |
49eb9389 | 844 | { |
5e8456fd PR |
845 | struct ethtool_link_ksettings diff1 = *cmd; |
846 | struct ethtool_link_ksettings diff2 = {}; | |
49eb9389 | 847 | |
5e8456fd PR |
848 | diff1.base.speed = 0; |
849 | diff1.base.duplex = 0; | |
49eb9389 | 850 | /* advertising and cmd are usually set */ |
5e8456fd PR |
851 | ethtool_link_ksettings_zero_link_mode(&diff1, advertising); |
852 | diff1.base.cmd = 0; | |
49eb9389 | 853 | /* We set port to PORT_OTHER */ |
5e8456fd | 854 | diff2.base.port = PORT_OTHER; |
49eb9389 | 855 | |
856 | return !memcmp(&diff1, &diff2, sizeof(diff1)); | |
857 | } | |
858 | ||
859 | static void netvsc_init_settings(struct net_device *dev) | |
860 | { | |
861 | struct net_device_context *ndc = netdev_priv(dev); | |
862 | ||
863 | ndc->speed = SPEED_UNKNOWN; | |
f3c9d40e | 864 | ndc->duplex = DUPLEX_FULL; |
49eb9389 | 865 | } |
866 | ||
5e8456fd PR |
867 | static int netvsc_get_link_ksettings(struct net_device *dev, |
868 | struct ethtool_link_ksettings *cmd) | |
49eb9389 | 869 | { |
870 | struct net_device_context *ndc = netdev_priv(dev); | |
871 | ||
5e8456fd PR |
872 | cmd->base.speed = ndc->speed; |
873 | cmd->base.duplex = ndc->duplex; | |
874 | cmd->base.port = PORT_OTHER; | |
49eb9389 | 875 | |
876 | return 0; | |
877 | } | |
878 | ||
5e8456fd PR |
879 | static int netvsc_set_link_ksettings(struct net_device *dev, |
880 | const struct ethtool_link_ksettings *cmd) | |
49eb9389 | 881 | { |
882 | struct net_device_context *ndc = netdev_priv(dev); | |
883 | u32 speed; | |
884 | ||
5e8456fd | 885 | speed = cmd->base.speed; |
49eb9389 | 886 | if (!ethtool_validate_speed(speed) || |
5e8456fd | 887 | !ethtool_validate_duplex(cmd->base.duplex) || |
49eb9389 | 888 | !netvsc_validate_ethtool_ss_cmd(cmd)) |
889 | return -EINVAL; | |
890 | ||
891 | ndc->speed = speed; | |
5e8456fd | 892 | ndc->duplex = cmd->base.duplex; |
49eb9389 | 893 | |
894 | return 0; | |
895 | } | |
896 | ||
4d447c9a HZ |
897 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
898 | { | |
899 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
545a8e79 | 900 | struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); |
3d541ac5 | 901 | struct hv_device *hdev = ndevctx->device_ctx; |
4d447c9a | 902 | struct netvsc_device_info device_info; |
163891d7 | 903 | bool was_running; |
386f5762 | 904 | int ret = 0; |
4d447c9a | 905 | |
a0be450e | 906 | if (!nvdev || nvdev->destroy) |
4d447c9a HZ |
907 | return -ENODEV; |
908 | ||
163891d7 | 909 | was_running = netif_running(ndev); |
910 | if (was_running) { | |
911 | ret = netvsc_close(ndev); | |
912 | if (ret) | |
913 | return ret; | |
914 | } | |
2de8530b | 915 | |
152669bd DC |
916 | memset(&device_info, 0, sizeof(device_info)); |
917 | device_info.ring_size = ring_size; | |
918 | device_info.num_chn = nvdev->num_chn; | |
919 | device_info.max_num_vrss_chns = nvdev->num_chn; | |
920 | ||
2289f0aa | 921 | rndis_filter_device_remove(hdev, nvdev); |
4d447c9a | 922 | |
152669bd DC |
923 | /* 'nvdev' has been freed in rndis_filter_device_remove() -> |
924 | * netvsc_device_remove () -> free_netvsc_device(). | |
925 | * We mustn't access it before it's re-created in | |
926 | * rndis_filter_device_add() -> netvsc_device_add(). | |
927 | */ | |
928 | ||
4d447c9a HZ |
929 | ndev->mtu = mtu; |
930 | ||
4d447c9a | 931 | rndis_filter_device_add(hdev, &device_info); |
4d447c9a | 932 | |
163891d7 | 933 | if (was_running) |
934 | ret = netvsc_open(ndev); | |
935 | ||
1bdcec8a VK |
936 | /* We may have missed link change notifications */ |
937 | schedule_delayed_work(&ndevctx->dwork, 0); | |
938 | ||
2de8530b | 939 | return ret; |
4d447c9a HZ |
940 | } |
941 | ||
bc1f4470 | 942 | static void netvsc_get_stats64(struct net_device *net, |
943 | struct rtnl_link_stats64 *t) | |
7eafd9b4 | 944 | { |
945 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
776e726b | 946 | struct netvsc_device *nvdev = rcu_dereference_rtnl(ndev_ctx->nvdev); |
6c80f3fc SX |
947 | int i; |
948 | ||
949 | if (!nvdev) | |
950 | return; | |
951 | ||
952 | for (i = 0; i < nvdev->num_chn; i++) { | |
953 | const struct netvsc_channel *nvchan = &nvdev->chan_table[i]; | |
954 | const struct netvsc_stats *stats; | |
955 | u64 packets, bytes, multicast; | |
7eafd9b4 | 956 | unsigned int start; |
957 | ||
6c80f3fc | 958 | stats = &nvchan->tx_stats; |
7eafd9b4 | 959 | do { |
6c80f3fc SX |
960 | start = u64_stats_fetch_begin_irq(&stats->syncp); |
961 | packets = stats->packets; | |
962 | bytes = stats->bytes; | |
963 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
964 | ||
965 | t->tx_bytes += bytes; | |
966 | t->tx_packets += packets; | |
7eafd9b4 | 967 | |
6c80f3fc | 968 | stats = &nvchan->rx_stats; |
7eafd9b4 | 969 | do { |
6c80f3fc SX |
970 | start = u64_stats_fetch_begin_irq(&stats->syncp); |
971 | packets = stats->packets; | |
972 | bytes = stats->bytes; | |
973 | multicast = stats->multicast + stats->broadcast; | |
974 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); | |
975 | ||
976 | t->rx_bytes += bytes; | |
977 | t->rx_packets += packets; | |
978 | t->multicast += multicast; | |
7eafd9b4 | 979 | } |
980 | ||
981 | t->tx_dropped = net->stats.tx_dropped; | |
b5124720 | 982 | t->tx_errors = net->stats.tx_errors; |
7eafd9b4 | 983 | |
984 | t->rx_dropped = net->stats.rx_dropped; | |
985 | t->rx_errors = net->stats.rx_errors; | |
7eafd9b4 | 986 | } |
1ce09e89 HZ |
987 | |
988 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
989 | { | |
1ce09e89 | 990 | struct sockaddr *addr = p; |
9a4c831e | 991 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
992 | unsigned char save_aatype; |
993 | int err; | |
994 | ||
995 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
996 | save_aatype = ndev->addr_assign_type; | |
997 | ||
998 | err = eth_mac_addr(ndev, p); | |
999 | if (err != 0) | |
1000 | return err; | |
1001 | ||
e834da9a | 1002 | err = rndis_filter_set_device_mac(ndev, addr->sa_data); |
1ce09e89 HZ |
1003 | if (err != 0) { |
1004 | /* roll back to saved MAC */ | |
1005 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
1006 | ndev->addr_assign_type = save_aatype; | |
1007 | } | |
1008 | ||
1009 | return err; | |
1010 | } | |
1011 | ||
4323b47c SH |
1012 | static const struct { |
1013 | char name[ETH_GSTRING_LEN]; | |
1014 | u16 offset; | |
1015 | } netvsc_stats[] = { | |
1016 | { "tx_scattered", offsetof(struct netvsc_ethtool_stats, tx_scattered) }, | |
1017 | { "tx_no_memory", offsetof(struct netvsc_ethtool_stats, tx_no_memory) }, | |
1018 | { "tx_no_space", offsetof(struct netvsc_ethtool_stats, tx_no_space) }, | |
1019 | { "tx_too_big", offsetof(struct netvsc_ethtool_stats, tx_too_big) }, | |
1020 | { "tx_busy", offsetof(struct netvsc_ethtool_stats, tx_busy) }, | |
1021 | }; | |
1022 | ||
6c80f3fc SX |
1023 | #define NETVSC_GLOBAL_STATS_LEN ARRAY_SIZE(netvsc_stats) |
1024 | ||
1025 | /* 4 statistics per queue (rx/tx packets/bytes) */ | |
1026 | #define NETVSC_QUEUE_STATS_LEN(dev) ((dev)->num_chn * 4) | |
1027 | ||
4323b47c SH |
1028 | static int netvsc_get_sset_count(struct net_device *dev, int string_set) |
1029 | { | |
6c80f3fc | 1030 | struct net_device_context *ndc = netdev_priv(dev); |
fbd4c7e7 | 1031 | struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
545a8e79 | 1032 | |
1033 | if (!nvdev) | |
1034 | return -ENODEV; | |
6c80f3fc | 1035 | |
4323b47c SH |
1036 | switch (string_set) { |
1037 | case ETH_SS_STATS: | |
6c80f3fc | 1038 | return NETVSC_GLOBAL_STATS_LEN + NETVSC_QUEUE_STATS_LEN(nvdev); |
4323b47c SH |
1039 | default: |
1040 | return -EINVAL; | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | static void netvsc_get_ethtool_stats(struct net_device *dev, | |
1045 | struct ethtool_stats *stats, u64 *data) | |
1046 | { | |
1047 | struct net_device_context *ndc = netdev_priv(dev); | |
545a8e79 | 1048 | struct netvsc_device *nvdev = rcu_dereference(ndc->nvdev); |
4323b47c | 1049 | const void *nds = &ndc->eth_stats; |
6c80f3fc SX |
1050 | const struct netvsc_stats *qstats; |
1051 | unsigned int start; | |
1052 | u64 packets, bytes; | |
1053 | int i, j; | |
4323b47c | 1054 | |
545a8e79 | 1055 | if (!nvdev) |
1056 | return; | |
1057 | ||
6c80f3fc | 1058 | for (i = 0; i < NETVSC_GLOBAL_STATS_LEN; i++) |
4323b47c | 1059 | data[i] = *(unsigned long *)(nds + netvsc_stats[i].offset); |
6c80f3fc SX |
1060 | |
1061 | for (j = 0; j < nvdev->num_chn; j++) { | |
1062 | qstats = &nvdev->chan_table[j].tx_stats; | |
1063 | ||
1064 | do { | |
1065 | start = u64_stats_fetch_begin_irq(&qstats->syncp); | |
1066 | packets = qstats->packets; | |
1067 | bytes = qstats->bytes; | |
1068 | } while (u64_stats_fetch_retry_irq(&qstats->syncp, start)); | |
1069 | data[i++] = packets; | |
1070 | data[i++] = bytes; | |
1071 | ||
1072 | qstats = &nvdev->chan_table[j].rx_stats; | |
1073 | do { | |
1074 | start = u64_stats_fetch_begin_irq(&qstats->syncp); | |
1075 | packets = qstats->packets; | |
1076 | bytes = qstats->bytes; | |
1077 | } while (u64_stats_fetch_retry_irq(&qstats->syncp, start)); | |
1078 | data[i++] = packets; | |
1079 | data[i++] = bytes; | |
1080 | } | |
4323b47c SH |
1081 | } |
1082 | ||
1083 | static void netvsc_get_strings(struct net_device *dev, u32 stringset, u8 *data) | |
1084 | { | |
6c80f3fc | 1085 | struct net_device_context *ndc = netdev_priv(dev); |
545a8e79 | 1086 | struct netvsc_device *nvdev = rcu_dereference(ndc->nvdev); |
6c80f3fc | 1087 | u8 *p = data; |
4323b47c SH |
1088 | int i; |
1089 | ||
545a8e79 | 1090 | if (!nvdev) |
1091 | return; | |
1092 | ||
4323b47c SH |
1093 | switch (stringset) { |
1094 | case ETH_SS_STATS: | |
1095 | for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) | |
6c80f3fc | 1096 | memcpy(p + i * ETH_GSTRING_LEN, |
4323b47c | 1097 | netvsc_stats[i].name, ETH_GSTRING_LEN); |
6c80f3fc SX |
1098 | |
1099 | p += i * ETH_GSTRING_LEN; | |
1100 | for (i = 0; i < nvdev->num_chn; i++) { | |
1101 | sprintf(p, "tx_queue_%u_packets", i); | |
1102 | p += ETH_GSTRING_LEN; | |
1103 | sprintf(p, "tx_queue_%u_bytes", i); | |
1104 | p += ETH_GSTRING_LEN; | |
1105 | sprintf(p, "rx_queue_%u_packets", i); | |
1106 | p += ETH_GSTRING_LEN; | |
1107 | sprintf(p, "rx_queue_%u_bytes", i); | |
1108 | p += ETH_GSTRING_LEN; | |
1109 | } | |
1110 | ||
4323b47c SH |
1111 | break; |
1112 | } | |
1113 | } | |
1114 | ||
b5a5dc8d | 1115 | static int |
1116 | netvsc_get_rss_hash_opts(struct netvsc_device *nvdev, | |
1117 | struct ethtool_rxnfc *info) | |
1118 | { | |
1119 | info->data = RXH_IP_SRC | RXH_IP_DST; | |
1120 | ||
1121 | switch (info->flow_type) { | |
1122 | case TCP_V4_FLOW: | |
1123 | case TCP_V6_FLOW: | |
1124 | info->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3; | |
1125 | /* fallthrough */ | |
1126 | case UDP_V4_FLOW: | |
1127 | case UDP_V6_FLOW: | |
1128 | case IPV4_FLOW: | |
1129 | case IPV6_FLOW: | |
1130 | break; | |
1131 | default: | |
1132 | info->data = 0; | |
1133 | break; | |
1134 | } | |
1135 | ||
1136 | return 0; | |
1137 | } | |
1138 | ||
b448f4e8 | 1139 | static int |
1140 | netvsc_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info, | |
1141 | u32 *rules) | |
1142 | { | |
1143 | struct net_device_context *ndc = netdev_priv(dev); | |
545a8e79 | 1144 | struct netvsc_device *nvdev = rcu_dereference(ndc->nvdev); |
1145 | ||
1146 | if (!nvdev) | |
1147 | return -ENODEV; | |
b448f4e8 | 1148 | |
1149 | switch (info->cmd) { | |
1150 | case ETHTOOL_GRXRINGS: | |
1151 | info->data = nvdev->num_chn; | |
1152 | return 0; | |
b5a5dc8d | 1153 | |
1154 | case ETHTOOL_GRXFH: | |
1155 | return netvsc_get_rss_hash_opts(nvdev, info); | |
b448f4e8 | 1156 | } |
1157 | return -EOPNOTSUPP; | |
1158 | } | |
1159 | ||
316158fe RW |
1160 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1161 | static void netvsc_poll_controller(struct net_device *net) | |
1162 | { | |
1163 | /* As netvsc_start_xmit() works synchronous we don't have to | |
1164 | * trigger anything here. | |
1165 | */ | |
1166 | } | |
1167 | #endif | |
1ce09e89 | 1168 | |
962f3fee | 1169 | static u32 netvsc_get_rxfh_key_size(struct net_device *dev) |
1170 | { | |
1171 | return NETVSC_HASH_KEYLEN; | |
1172 | } | |
1173 | ||
1174 | static u32 netvsc_rss_indir_size(struct net_device *dev) | |
1175 | { | |
ff4a4419 | 1176 | return ITAB_NUM; |
962f3fee | 1177 | } |
1178 | ||
1179 | static int netvsc_get_rxfh(struct net_device *dev, u32 *indir, u8 *key, | |
1180 | u8 *hfunc) | |
1181 | { | |
1182 | struct net_device_context *ndc = netdev_priv(dev); | |
545a8e79 | 1183 | struct netvsc_device *ndev = rcu_dereference(ndc->nvdev); |
eb996edb | 1184 | struct rndis_device *rndis_dev; |
ff4a4419 | 1185 | int i; |
962f3fee | 1186 | |
545a8e79 | 1187 | if (!ndev) |
1188 | return -ENODEV; | |
1189 | ||
962f3fee | 1190 | if (hfunc) |
1191 | *hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */ | |
1192 | ||
eb996edb | 1193 | rndis_dev = ndev->extension; |
ff4a4419 | 1194 | if (indir) { |
1195 | for (i = 0; i < ITAB_NUM; i++) | |
1196 | indir[i] = rndis_dev->ind_table[i]; | |
1197 | } | |
1198 | ||
962f3fee | 1199 | if (key) |
1200 | memcpy(key, rndis_dev->rss_key, NETVSC_HASH_KEYLEN); | |
1201 | ||
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | static int netvsc_set_rxfh(struct net_device *dev, const u32 *indir, | |
1206 | const u8 *key, const u8 hfunc) | |
1207 | { | |
1208 | struct net_device_context *ndc = netdev_priv(dev); | |
545a8e79 | 1209 | struct netvsc_device *ndev = rtnl_dereference(ndc->nvdev); |
eb996edb | 1210 | struct rndis_device *rndis_dev; |
ff4a4419 | 1211 | int i; |
962f3fee | 1212 | |
545a8e79 | 1213 | if (!ndev) |
1214 | return -ENODEV; | |
1215 | ||
962f3fee | 1216 | if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP) |
1217 | return -EOPNOTSUPP; | |
1218 | ||
eb996edb | 1219 | rndis_dev = ndev->extension; |
ff4a4419 | 1220 | if (indir) { |
1221 | for (i = 0; i < ITAB_NUM; i++) | |
1222 | if (indir[i] >= dev->num_rx_queues) | |
1223 | return -EINVAL; | |
1224 | ||
1225 | for (i = 0; i < ITAB_NUM; i++) | |
1226 | rndis_dev->ind_table[i] = indir[i]; | |
1227 | } | |
1228 | ||
1229 | if (!key) { | |
1230 | if (!indir) | |
1231 | return 0; | |
1232 | ||
1233 | key = rndis_dev->rss_key; | |
1234 | } | |
962f3fee | 1235 | |
1236 | return rndis_filter_set_rss_param(rndis_dev, key, ndev->num_chn); | |
1237 | } | |
1238 | ||
f82f4ad7 SH |
1239 | static const struct ethtool_ops ethtool_ops = { |
1240 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 | 1241 | .get_link = ethtool_op_get_link, |
4323b47c SH |
1242 | .get_ethtool_stats = netvsc_get_ethtool_stats, |
1243 | .get_sset_count = netvsc_get_sset_count, | |
1244 | .get_strings = netvsc_get_strings, | |
59995370 | 1245 | .get_channels = netvsc_get_channels, |
b5960e6e | 1246 | .set_channels = netvsc_set_channels, |
76d13b56 | 1247 | .get_ts_info = ethtool_op_get_ts_info, |
b448f4e8 | 1248 | .get_rxnfc = netvsc_get_rxnfc, |
962f3fee | 1249 | .get_rxfh_key_size = netvsc_get_rxfh_key_size, |
1250 | .get_rxfh_indir_size = netvsc_rss_indir_size, | |
1251 | .get_rxfh = netvsc_get_rxfh, | |
1252 | .set_rxfh = netvsc_set_rxfh, | |
5e8456fd PR |
1253 | .get_link_ksettings = netvsc_get_link_ksettings, |
1254 | .set_link_ksettings = netvsc_set_link_ksettings, | |
f82f4ad7 SH |
1255 | }; |
1256 | ||
df2fff28 GKH |
1257 | static const struct net_device_ops device_ops = { |
1258 | .ndo_open = netvsc_open, | |
1259 | .ndo_stop = netvsc_close, | |
1260 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 1261 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 1262 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 1263 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 1264 | .ndo_set_mac_address = netvsc_set_mac_addr, |
5b54dac8 | 1265 | .ndo_select_queue = netvsc_select_queue, |
7eafd9b4 | 1266 | .ndo_get_stats64 = netvsc_get_stats64, |
316158fe RW |
1267 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1268 | .ndo_poll_controller = netvsc_poll_controller, | |
1269 | #endif | |
df2fff28 GKH |
1270 | }; |
1271 | ||
c996edcf | 1272 | /* |
27a70af3 VK |
1273 | * Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link |
1274 | * down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is | |
1275 | * present send GARP packet to network peers with netif_notify_peers(). | |
c996edcf | 1276 | */ |
891de74d | 1277 | static void netvsc_link_change(struct work_struct *w) |
c996edcf | 1278 | { |
0a1275ca VK |
1279 | struct net_device_context *ndev_ctx = |
1280 | container_of(w, struct net_device_context, dwork.work); | |
1281 | struct hv_device *device_obj = ndev_ctx->device_ctx; | |
1282 | struct net_device *net = hv_get_drvdata(device_obj); | |
2ddd5e5f | 1283 | struct netvsc_device *net_device; |
891de74d | 1284 | struct rndis_device *rdev; |
27a70af3 VK |
1285 | struct netvsc_reconfig *event = NULL; |
1286 | bool notify = false, reschedule = false; | |
1287 | unsigned long flags, next_reconfig, delay; | |
c996edcf | 1288 | |
1bdcec8a | 1289 | rtnl_lock(); |
a0be450e | 1290 | net_device = rtnl_dereference(ndev_ctx->nvdev); |
1291 | if (!net_device) | |
1bdcec8a VK |
1292 | goto out_unlock; |
1293 | ||
891de74d | 1294 | rdev = net_device->extension; |
891de74d | 1295 | |
27a70af3 VK |
1296 | next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT; |
1297 | if (time_is_after_jiffies(next_reconfig)) { | |
1298 | /* link_watch only sends one notification with current state | |
1299 | * per second, avoid doing reconfig more frequently. Handle | |
1300 | * wrap around. | |
1301 | */ | |
1302 | delay = next_reconfig - jiffies; | |
1303 | delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT; | |
1304 | schedule_delayed_work(&ndev_ctx->dwork, delay); | |
1bdcec8a | 1305 | goto out_unlock; |
27a70af3 VK |
1306 | } |
1307 | ndev_ctx->last_reconfig = jiffies; | |
1308 | ||
1309 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
1310 | if (!list_empty(&ndev_ctx->reconfig_events)) { | |
1311 | event = list_first_entry(&ndev_ctx->reconfig_events, | |
1312 | struct netvsc_reconfig, list); | |
1313 | list_del(&event->list); | |
1314 | reschedule = !list_empty(&ndev_ctx->reconfig_events); | |
1315 | } | |
1316 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
1317 | ||
1318 | if (!event) | |
1bdcec8a | 1319 | goto out_unlock; |
27a70af3 VK |
1320 | |
1321 | switch (event->event) { | |
1322 | /* Only the following events are possible due to the check in | |
1323 | * netvsc_linkstatus_callback() | |
1324 | */ | |
1325 | case RNDIS_STATUS_MEDIA_CONNECT: | |
1326 | if (rdev->link_state) { | |
1327 | rdev->link_state = false; | |
1328 | netif_carrier_on(net); | |
1329 | netif_tx_wake_all_queues(net); | |
1330 | } else { | |
1331 | notify = true; | |
1332 | } | |
1333 | kfree(event); | |
1334 | break; | |
1335 | case RNDIS_STATUS_MEDIA_DISCONNECT: | |
1336 | if (!rdev->link_state) { | |
1337 | rdev->link_state = true; | |
1338 | netif_carrier_off(net); | |
1339 | netif_tx_stop_all_queues(net); | |
1340 | } | |
1341 | kfree(event); | |
1342 | break; | |
1343 | case RNDIS_STATUS_NETWORK_CHANGE: | |
1344 | /* Only makes sense if carrier is present */ | |
1345 | if (!rdev->link_state) { | |
1346 | rdev->link_state = true; | |
1347 | netif_carrier_off(net); | |
1348 | netif_tx_stop_all_queues(net); | |
1349 | event->event = RNDIS_STATUS_MEDIA_CONNECT; | |
1350 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
15cfd407 | 1351 | list_add(&event->list, &ndev_ctx->reconfig_events); |
27a70af3 VK |
1352 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
1353 | reschedule = true; | |
3a494e71 | 1354 | } |
27a70af3 | 1355 | break; |
891de74d HZ |
1356 | } |
1357 | ||
1358 | rtnl_unlock(); | |
1359 | ||
1360 | if (notify) | |
1361 | netdev_notify_peers(net); | |
27a70af3 VK |
1362 | |
1363 | /* link_watch only sends one notification with current state per | |
1364 | * second, handle next reconfig event in 2 seconds. | |
1365 | */ | |
1366 | if (reschedule) | |
1367 | schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); | |
1bdcec8a VK |
1368 | |
1369 | return; | |
1370 | ||
1371 | out_unlock: | |
1372 | rtnl_unlock(); | |
c996edcf HZ |
1373 | } |
1374 | ||
e8ff40d4 | 1375 | static struct net_device *get_netvsc_bymac(const u8 *mac) |
84bf9cef | 1376 | { |
e8ff40d4 | 1377 | struct net_device *dev; |
84bf9cef | 1378 | |
8737caaf | 1379 | ASSERT_RTNL(); |
84bf9cef KS |
1380 | |
1381 | for_each_netdev(&init_net, dev) { | |
e8ff40d4 SH |
1382 | if (dev->netdev_ops != &device_ops) |
1383 | continue; /* not a netvsc device */ | |
1384 | ||
1385 | if (ether_addr_equal(mac, dev->perm_addr)) | |
1386 | return dev; | |
1387 | } | |
1388 | ||
1389 | return NULL; | |
1390 | } | |
1391 | ||
f207c10d | 1392 | static struct net_device *get_netvsc_byref(struct net_device *vf_netdev) |
e8ff40d4 SH |
1393 | { |
1394 | struct net_device *dev; | |
1395 | ||
1396 | ASSERT_RTNL(); | |
1397 | ||
1398 | for_each_netdev(&init_net, dev) { | |
1399 | struct net_device_context *net_device_ctx; | |
1400 | ||
1401 | if (dev->netdev_ops != &device_ops) | |
1402 | continue; /* not a netvsc device */ | |
1403 | ||
1404 | net_device_ctx = netdev_priv(dev); | |
1405 | if (net_device_ctx->nvdev == NULL) | |
1406 | continue; /* device is removed */ | |
1407 | ||
f207c10d | 1408 | if (rtnl_dereference(net_device_ctx->vf_netdev) == vf_netdev) |
e8ff40d4 | 1409 | return dev; /* a match */ |
84bf9cef | 1410 | } |
84bf9cef | 1411 | |
e8ff40d4 | 1412 | return NULL; |
84bf9cef KS |
1413 | } |
1414 | ||
1415 | static int netvsc_register_vf(struct net_device *vf_netdev) | |
1416 | { | |
0a1275ca VK |
1417 | struct net_device *ndev; |
1418 | struct net_device_context *net_device_ctx; | |
84bf9cef | 1419 | struct netvsc_device *netvsc_dev; |
84bf9cef | 1420 | |
e8ff40d4 SH |
1421 | if (vf_netdev->addr_len != ETH_ALEN) |
1422 | return NOTIFY_DONE; | |
1423 | ||
84bf9cef KS |
1424 | /* |
1425 | * We will use the MAC address to locate the synthetic interface to | |
1426 | * associate with the VF interface. If we don't find a matching | |
1427 | * synthetic interface, move on. | |
1428 | */ | |
e8ff40d4 | 1429 | ndev = get_netvsc_bymac(vf_netdev->perm_addr); |
0a1275ca VK |
1430 | if (!ndev) |
1431 | return NOTIFY_DONE; | |
1432 | ||
1433 | net_device_ctx = netdev_priv(ndev); | |
545a8e79 | 1434 | netvsc_dev = rtnl_dereference(net_device_ctx->nvdev); |
f207c10d | 1435 | if (!netvsc_dev || rtnl_dereference(net_device_ctx->vf_netdev)) |
84bf9cef KS |
1436 | return NOTIFY_DONE; |
1437 | ||
0a1275ca | 1438 | netdev_info(ndev, "VF registering: %s\n", vf_netdev->name); |
84bf9cef KS |
1439 | /* |
1440 | * Take a reference on the module. | |
1441 | */ | |
1442 | try_module_get(THIS_MODULE); | |
07d0f000 SH |
1443 | |
1444 | dev_hold(vf_netdev); | |
f207c10d | 1445 | rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev); |
84bf9cef KS |
1446 | return NOTIFY_OK; |
1447 | } | |
1448 | ||
84bf9cef KS |
1449 | static int netvsc_vf_up(struct net_device *vf_netdev) |
1450 | { | |
0a1275ca | 1451 | struct net_device *ndev; |
84bf9cef | 1452 | struct netvsc_device *netvsc_dev; |
84bf9cef KS |
1453 | struct net_device_context *net_device_ctx; |
1454 | ||
e8ff40d4 | 1455 | ndev = get_netvsc_byref(vf_netdev); |
0a1275ca VK |
1456 | if (!ndev) |
1457 | return NOTIFY_DONE; | |
1458 | ||
1459 | net_device_ctx = netdev_priv(ndev); | |
545a8e79 | 1460 | netvsc_dev = rtnl_dereference(net_device_ctx->nvdev); |
84bf9cef | 1461 | |
0a1275ca | 1462 | netdev_info(ndev, "VF up: %s\n", vf_netdev->name); |
84bf9cef KS |
1463 | |
1464 | /* | |
1465 | * Open the device before switching data path. | |
1466 | */ | |
2f5fa6c8 | 1467 | rndis_filter_open(netvsc_dev); |
84bf9cef KS |
1468 | |
1469 | /* | |
1470 | * notify the host to switch the data path. | |
1471 | */ | |
0a1275ca VK |
1472 | netvsc_switch_datapath(ndev, true); |
1473 | netdev_info(ndev, "Data path switched to VF: %s\n", vf_netdev->name); | |
84bf9cef | 1474 | |
0a1275ca | 1475 | netif_carrier_off(ndev); |
84bf9cef | 1476 | |
d072218f VK |
1477 | /* Now notify peers through VF device. */ |
1478 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, vf_netdev); | |
84bf9cef KS |
1479 | |
1480 | return NOTIFY_OK; | |
1481 | } | |
1482 | ||
84bf9cef KS |
1483 | static int netvsc_vf_down(struct net_device *vf_netdev) |
1484 | { | |
0a1275ca | 1485 | struct net_device *ndev; |
84bf9cef KS |
1486 | struct netvsc_device *netvsc_dev; |
1487 | struct net_device_context *net_device_ctx; | |
84bf9cef | 1488 | |
e8ff40d4 | 1489 | ndev = get_netvsc_byref(vf_netdev); |
0a1275ca VK |
1490 | if (!ndev) |
1491 | return NOTIFY_DONE; | |
1492 | ||
1493 | net_device_ctx = netdev_priv(ndev); | |
545a8e79 | 1494 | netvsc_dev = rtnl_dereference(net_device_ctx->nvdev); |
84bf9cef | 1495 | |
0a1275ca | 1496 | netdev_info(ndev, "VF down: %s\n", vf_netdev->name); |
0a1275ca VK |
1497 | netvsc_switch_datapath(ndev, false); |
1498 | netdev_info(ndev, "Data path switched from VF: %s\n", vf_netdev->name); | |
2f5fa6c8 | 1499 | rndis_filter_close(netvsc_dev); |
0a1275ca | 1500 | netif_carrier_on(ndev); |
d072218f VK |
1501 | |
1502 | /* Now notify peers through netvsc device. */ | |
1503 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, ndev); | |
84bf9cef KS |
1504 | |
1505 | return NOTIFY_OK; | |
1506 | } | |
1507 | ||
84bf9cef KS |
1508 | static int netvsc_unregister_vf(struct net_device *vf_netdev) |
1509 | { | |
0a1275ca | 1510 | struct net_device *ndev; |
0a1275ca | 1511 | struct net_device_context *net_device_ctx; |
84bf9cef | 1512 | |
e8ff40d4 | 1513 | ndev = get_netvsc_byref(vf_netdev); |
0a1275ca VK |
1514 | if (!ndev) |
1515 | return NOTIFY_DONE; | |
1516 | ||
1517 | net_device_ctx = netdev_priv(ndev); | |
e8ff40d4 | 1518 | |
0a1275ca | 1519 | netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); |
f207c10d SH |
1520 | |
1521 | RCU_INIT_POINTER(net_device_ctx->vf_netdev, NULL); | |
07d0f000 | 1522 | dev_put(vf_netdev); |
84bf9cef KS |
1523 | module_put(THIS_MODULE); |
1524 | return NOTIFY_OK; | |
1525 | } | |
1526 | ||
84946899 S |
1527 | static int netvsc_probe(struct hv_device *dev, |
1528 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 1529 | { |
df2fff28 GKH |
1530 | struct net_device *net = NULL; |
1531 | struct net_device_context *net_device_ctx; | |
1532 | struct netvsc_device_info device_info; | |
5b54dac8 | 1533 | struct netvsc_device *nvdev; |
df2fff28 GKH |
1534 | int ret; |
1535 | ||
5b54dac8 | 1536 | net = alloc_etherdev_mq(sizeof(struct net_device_context), |
2b01888d | 1537 | VRSS_CHANNEL_MAX); |
df2fff28 | 1538 | if (!net) |
51a805d0 | 1539 | return -ENOMEM; |
df2fff28 | 1540 | |
1b07da51 HZ |
1541 | netif_carrier_off(net); |
1542 | ||
b37879e6 HZ |
1543 | netvsc_init_settings(net); |
1544 | ||
df2fff28 | 1545 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 1546 | net_device_ctx->device_ctx = dev; |
3f300ff4 SX |
1547 | net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); |
1548 | if (netif_msg_probe(net_device_ctx)) | |
1549 | netdev_dbg(net, "netvsc msg_enable: %d\n", | |
1550 | net_device_ctx->msg_enable); | |
1551 | ||
2ddd5e5f | 1552 | hv_set_drvdata(dev, net); |
f580aec4 | 1553 | |
891de74d | 1554 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
792df872 | 1555 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
df2fff28 | 1556 | |
27a70af3 VK |
1557 | spin_lock_init(&net_device_ctx->lock); |
1558 | INIT_LIST_HEAD(&net_device_ctx->reconfig_events); | |
1559 | ||
df2fff28 | 1560 | net->netdev_ops = &device_ops; |
7ad24ea4 | 1561 | net->ethtool_ops = ðtool_ops; |
9efd21e1 | 1562 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 1563 | |
14a03cf8 VK |
1564 | /* We always need headroom for rndis header */ |
1565 | net->needed_headroom = RNDIS_AND_PPI_SIZE; | |
1566 | ||
692e084e | 1567 | /* Notify the netvsc driver of the new device */ |
8ebdcc52 | 1568 | memset(&device_info, 0, sizeof(device_info)); |
692e084e | 1569 | device_info.ring_size = ring_size; |
3071ada4 | 1570 | device_info.num_chn = VRSS_CHANNEL_DEFAULT; |
692e084e HZ |
1571 | ret = rndis_filter_device_add(dev, &device_info); |
1572 | if (ret != 0) { | |
1573 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
6c80f3fc | 1574 | free_netdev(net); |
2ddd5e5f | 1575 | hv_set_drvdata(dev, NULL); |
692e084e | 1576 | return ret; |
df2fff28 | 1577 | } |
692e084e HZ |
1578 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
1579 | ||
23312a3b | 1580 | /* hw_features computed in rndis_filter_device_add */ |
1581 | net->features = net->hw_features | | |
1582 | NETIF_F_HIGHDMA | NETIF_F_SG | | |
1583 | NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; | |
1584 | net->vlan_features = net->features; | |
1585 | ||
545a8e79 | 1586 | /* RCU not necessary here, device not registered */ |
3d541ac5 | 1587 | nvdev = net_device_ctx->nvdev; |
5b54dac8 HZ |
1588 | netif_set_real_num_tx_queues(net, nvdev->num_chn); |
1589 | netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
5b54dac8 | 1590 | |
d0c2c997 JW |
1591 | /* MTU range: 68 - 1500 or 65521 */ |
1592 | net->min_mtu = NETVSC_MTU_MIN; | |
1593 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) | |
1594 | net->max_mtu = NETVSC_MTU - ETH_HLEN; | |
1595 | else | |
1596 | net->max_mtu = ETH_DATA_LEN; | |
1597 | ||
a68f9614 HZ |
1598 | ret = register_netdev(net); |
1599 | if (ret != 0) { | |
1600 | pr_err("Unable to register netdev.\n"); | |
2289f0aa | 1601 | rndis_filter_device_remove(dev, nvdev); |
6c80f3fc | 1602 | free_netdev(net); |
a68f9614 HZ |
1603 | } |
1604 | ||
df2fff28 GKH |
1605 | return ret; |
1606 | } | |
1607 | ||
415b023a | 1608 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 1609 | { |
2ddd5e5f | 1610 | struct net_device *net; |
122a5f64 | 1611 | struct net_device_context *ndev_ctx; |
2ddd5e5f | 1612 | |
3d541ac5 | 1613 | net = hv_get_drvdata(dev); |
df2fff28 | 1614 | |
df2fff28 | 1615 | if (net == NULL) { |
415b023a | 1616 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
1617 | return 0; |
1618 | } | |
1619 | ||
122a5f64 | 1620 | ndev_ctx = netdev_priv(net); |
3d541ac5 | 1621 | |
a0be450e | 1622 | netif_device_detach(net); |
f580aec4 | 1623 | |
122a5f64 | 1624 | cancel_delayed_work_sync(&ndev_ctx->dwork); |
792df872 | 1625 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 1626 | |
df2fff28 GKH |
1627 | /* |
1628 | * Call to the vsc driver to let it know that the device is being | |
a0be450e | 1629 | * removed. Also blocks mtu and channel changes. |
df2fff28 | 1630 | */ |
a0be450e | 1631 | rtnl_lock(); |
2289f0aa | 1632 | rndis_filter_device_remove(dev, ndev_ctx->nvdev); |
a0be450e | 1633 | rtnl_unlock(); |
1634 | ||
1635 | unregister_netdev(net); | |
df2fff28 | 1636 | |
3d541ac5 VK |
1637 | hv_set_drvdata(dev, NULL); |
1638 | ||
6c80f3fc | 1639 | free_netdev(net); |
df06bcff | 1640 | return 0; |
df2fff28 GKH |
1641 | } |
1642 | ||
345c4cc3 | 1643 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 1644 | /* Network guid */ |
8f505944 | 1645 | { HV_NIC_GUID, }, |
c45cf2d4 | 1646 | { }, |
345c4cc3 S |
1647 | }; |
1648 | ||
1649 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
1650 | ||
f1542a66 | 1651 | /* The one and only one */ |
fde0ef9b | 1652 | static struct hv_driver netvsc_drv = { |
d31b20fc | 1653 | .name = KBUILD_MODNAME, |
345c4cc3 | 1654 | .id_table = id_table, |
fde0ef9b S |
1655 | .probe = netvsc_probe, |
1656 | .remove = netvsc_remove, | |
d4890970 | 1657 | }; |
f1542a66 | 1658 | |
84bf9cef KS |
1659 | /* |
1660 | * On Hyper-V, every VF interface is matched with a corresponding | |
1661 | * synthetic interface. The synthetic interface is presented first | |
1662 | * to the guest. When the corresponding VF instance is registered, | |
1663 | * we will take care of switching the data path. | |
1664 | */ | |
1665 | static int netvsc_netdev_event(struct notifier_block *this, | |
1666 | unsigned long event, void *ptr) | |
1667 | { | |
1668 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); | |
1669 | ||
ee837a13 SH |
1670 | /* Skip our own events */ |
1671 | if (event_dev->netdev_ops == &device_ops) | |
1672 | return NOTIFY_DONE; | |
1673 | ||
1674 | /* Avoid non-Ethernet type devices */ | |
1675 | if (event_dev->type != ARPHRD_ETHER) | |
1676 | return NOTIFY_DONE; | |
1677 | ||
0dbff144 | 1678 | /* Avoid Vlan dev with same MAC registering as VF */ |
d0d7b10b | 1679 | if (is_vlan_dev(event_dev)) |
0dbff144 VK |
1680 | return NOTIFY_DONE; |
1681 | ||
1682 | /* Avoid Bonding master dev with same MAC registering as VF */ | |
ee837a13 SH |
1683 | if ((event_dev->priv_flags & IFF_BONDING) && |
1684 | (event_dev->flags & IFF_MASTER)) | |
cb2911fe HZ |
1685 | return NOTIFY_DONE; |
1686 | ||
84bf9cef KS |
1687 | switch (event) { |
1688 | case NETDEV_REGISTER: | |
1689 | return netvsc_register_vf(event_dev); | |
1690 | case NETDEV_UNREGISTER: | |
1691 | return netvsc_unregister_vf(event_dev); | |
1692 | case NETDEV_UP: | |
1693 | return netvsc_vf_up(event_dev); | |
1694 | case NETDEV_DOWN: | |
1695 | return netvsc_vf_down(event_dev); | |
1696 | default: | |
1697 | return NOTIFY_DONE; | |
1698 | } | |
1699 | } | |
1700 | ||
1701 | static struct notifier_block netvsc_netdev_notifier = { | |
1702 | .notifier_call = netvsc_netdev_event, | |
1703 | }; | |
1704 | ||
a9869c94 | 1705 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 1706 | { |
84bf9cef | 1707 | unregister_netdevice_notifier(&netvsc_netdev_notifier); |
768fa219 | 1708 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
1709 | } |
1710 | ||
1fde28cf | 1711 | static int __init netvsc_drv_init(void) |
df2fff28 | 1712 | { |
84bf9cef KS |
1713 | int ret; |
1714 | ||
fa85a6c2 HZ |
1715 | if (ring_size < RING_SIZE_MIN) { |
1716 | ring_size = RING_SIZE_MIN; | |
1717 | pr_info("Increased ring_size to %d (min allowed)\n", | |
1718 | ring_size); | |
1719 | } | |
84bf9cef KS |
1720 | ret = vmbus_driver_register(&netvsc_drv); |
1721 | ||
1722 | if (ret) | |
1723 | return ret; | |
1724 | ||
1725 | register_netdevice_notifier(&netvsc_netdev_notifier); | |
1726 | return 0; | |
df2fff28 GKH |
1727 | } |
1728 | ||
26c14cc1 | 1729 | MODULE_LICENSE("GPL"); |
7880fc54 | 1730 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 1731 | |
1fde28cf | 1732 | module_init(netvsc_drv_init); |
a9869c94 | 1733 | module_exit(netvsc_drv_exit); |