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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 | |
fceaf24a | 43 | |
fa85a6c2 | 44 | #define RING_SIZE_MIN 64 |
27a70af3 | 45 | #define LINKCHANGE_INT (2 * HZ) |
a060679c | 46 | #define NETVSC_HW_FEATURES (NETIF_F_RXCSUM | \ |
47 | NETIF_F_SG | \ | |
48 | NETIF_F_TSO | \ | |
49 | NETIF_F_TSO6 | \ | |
50 | NETIF_F_HW_CSUM) | |
99c8da0f | 51 | static int ring_size = 128; |
450d7a4b SH |
52 | module_param(ring_size, int, S_IRUGO); |
53 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); | |
fceaf24a | 54 | |
e01ec219 KS |
55 | static int max_num_vrss_chns = 8; |
56 | ||
3f300ff4 SX |
57 | static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | |
58 | NETIF_MSG_LINK | NETIF_MSG_IFUP | | |
59 | NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | | |
60 | NETIF_MSG_TX_ERR; | |
61 | ||
62 | static int debug = -1; | |
63 | module_param(debug, int, S_IRUGO); | |
64 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
65 | ||
d426b2e3 HZ |
66 | static void do_set_multicast(struct work_struct *w) |
67 | { | |
792df872 WM |
68 | struct net_device_context *ndevctx = |
69 | container_of(w, struct net_device_context, work); | |
0a1275ca VK |
70 | struct hv_device *device_obj = ndevctx->device_ctx; |
71 | struct net_device *ndev = hv_get_drvdata(device_obj); | |
72 | struct netvsc_device *nvdev = ndevctx->nvdev; | |
d426b2e3 HZ |
73 | struct rndis_device *rdev; |
74 | ||
0a1275ca | 75 | if (!nvdev) |
792df872 | 76 | return; |
d426b2e3 HZ |
77 | |
78 | rdev = nvdev->extension; | |
79 | if (rdev == NULL) | |
792df872 | 80 | return; |
d426b2e3 | 81 | |
0a1275ca | 82 | if (ndev->flags & IFF_PROMISC) |
d426b2e3 HZ |
83 | rndis_filter_set_packet_filter(rdev, |
84 | NDIS_PACKET_TYPE_PROMISCUOUS); | |
85 | else | |
86 | rndis_filter_set_packet_filter(rdev, | |
87 | NDIS_PACKET_TYPE_BROADCAST | | |
88 | NDIS_PACKET_TYPE_ALL_MULTICAST | | |
89 | NDIS_PACKET_TYPE_DIRECTED); | |
d426b2e3 HZ |
90 | } |
91 | ||
4e9bfefa | 92 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a | 93 | { |
792df872 | 94 | struct net_device_context *net_device_ctx = netdev_priv(net); |
d426b2e3 | 95 | |
792df872 | 96 | schedule_work(&net_device_ctx->work); |
fceaf24a HJ |
97 | } |
98 | ||
fceaf24a HJ |
99 | static int netvsc_open(struct net_device *net) |
100 | { | |
2f5fa6c8 | 101 | struct netvsc_device *nvdev = net_device_to_netvsc_device(net); |
891de74d | 102 | struct rndis_device *rdev; |
02fafbc6 | 103 | int ret = 0; |
fceaf24a | 104 | |
891de74d HZ |
105 | netif_carrier_off(net); |
106 | ||
d515d0ff | 107 | /* Open up the device */ |
2f5fa6c8 | 108 | ret = rndis_filter_open(nvdev); |
d515d0ff HZ |
109 | if (ret != 0) { |
110 | netdev_err(net, "unable to open device (ret %d).\n", ret); | |
111 | return ret; | |
fceaf24a HJ |
112 | } |
113 | ||
2de8530b | 114 | netif_tx_wake_all_queues(net); |
d515d0ff | 115 | |
891de74d HZ |
116 | rdev = nvdev->extension; |
117 | if (!rdev->link_state) | |
118 | netif_carrier_on(net); | |
119 | ||
fceaf24a HJ |
120 | return ret; |
121 | } | |
122 | ||
fceaf24a HJ |
123 | static int netvsc_close(struct net_device *net) |
124 | { | |
fceaf24a | 125 | struct net_device_context *net_device_ctx = netdev_priv(net); |
3d541ac5 | 126 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
02fafbc6 | 127 | int ret; |
2de8530b HZ |
128 | u32 aread, awrite, i, msec = 10, retry = 0, retry_max = 20; |
129 | struct vmbus_channel *chn; | |
fceaf24a | 130 | |
0a282538 | 131 | netif_tx_disable(net); |
fceaf24a | 132 | |
792df872 WM |
133 | /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */ |
134 | cancel_work_sync(&net_device_ctx->work); | |
2f5fa6c8 | 135 | ret = rndis_filter_close(nvdev); |
2de8530b | 136 | if (ret != 0) { |
eb335bc4 | 137 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
2de8530b HZ |
138 | return ret; |
139 | } | |
140 | ||
141 | /* Ensure pending bytes in ring are read */ | |
142 | while (true) { | |
143 | aread = 0; | |
144 | for (i = 0; i < nvdev->num_chn; i++) { | |
145 | chn = nvdev->chn_table[i]; | |
146 | if (!chn) | |
147 | continue; | |
148 | ||
149 | hv_get_ringbuffer_availbytes(&chn->inbound, &aread, | |
150 | &awrite); | |
151 | ||
152 | if (aread) | |
153 | break; | |
154 | ||
155 | hv_get_ringbuffer_availbytes(&chn->outbound, &aread, | |
156 | &awrite); | |
157 | ||
158 | if (aread) | |
159 | break; | |
160 | } | |
161 | ||
162 | retry++; | |
163 | if (retry > retry_max || aread == 0) | |
164 | break; | |
165 | ||
166 | msleep(msec); | |
167 | ||
168 | if (msec < 1000) | |
169 | msec *= 2; | |
170 | } | |
171 | ||
172 | if (aread) { | |
173 | netdev_err(net, "Ring buffer not empty after closing rndis\n"); | |
174 | ret = -ETIMEDOUT; | |
175 | } | |
fceaf24a | 176 | |
fceaf24a HJ |
177 | return ret; |
178 | } | |
179 | ||
8a00251a KS |
180 | static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size, |
181 | int pkt_type) | |
182 | { | |
183 | struct rndis_packet *rndis_pkt; | |
184 | struct rndis_per_packet_info *ppi; | |
185 | ||
186 | rndis_pkt = &msg->msg.pkt; | |
187 | rndis_pkt->data_offset += ppi_size; | |
188 | ||
189 | ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt + | |
190 | rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len); | |
191 | ||
192 | ppi->size = ppi_size; | |
193 | ppi->type = pkt_type; | |
194 | ppi->ppi_offset = sizeof(struct rndis_per_packet_info); | |
195 | ||
196 | rndis_pkt->per_pkt_info_len += ppi_size; | |
197 | ||
198 | return ppi; | |
199 | } | |
200 | ||
5b54dac8 HZ |
201 | static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, |
202 | void *accel_priv, select_queue_fallback_t fallback) | |
203 | { | |
204 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
3d541ac5 | 205 | struct netvsc_device *nvsc_dev = net_device_ctx->nvdev; |
5b54dac8 HZ |
206 | u32 hash; |
207 | u16 q_idx = 0; | |
208 | ||
209 | if (nvsc_dev == NULL || ndev->real_num_tx_queues <= 1) | |
210 | return 0; | |
211 | ||
757647e1 VK |
212 | hash = skb_get_hash(skb); |
213 | q_idx = nvsc_dev->send_table[hash % VRSS_SEND_TAB_SIZE] % | |
214 | ndev->real_num_tx_queues; | |
5b54dac8 | 215 | |
8b9fbe1a VK |
216 | if (!nvsc_dev->chn_table[q_idx]) |
217 | q_idx = 0; | |
218 | ||
5b54dac8 HZ |
219 | return q_idx; |
220 | } | |
221 | ||
54a7357f KS |
222 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
223 | struct hv_page_buffer *pb) | |
224 | { | |
225 | int j = 0; | |
226 | ||
227 | /* Deal with compund pages by ignoring unused part | |
228 | * of the page. | |
229 | */ | |
230 | page += (offset >> PAGE_SHIFT); | |
231 | offset &= ~PAGE_MASK; | |
232 | ||
233 | while (len > 0) { | |
234 | unsigned long bytes; | |
235 | ||
236 | bytes = PAGE_SIZE - offset; | |
237 | if (bytes > len) | |
238 | bytes = len; | |
239 | pb[j].pfn = page_to_pfn(page); | |
240 | pb[j].offset = offset; | |
241 | pb[j].len = bytes; | |
242 | ||
243 | offset += bytes; | |
244 | len -= bytes; | |
245 | ||
246 | if (offset == PAGE_SIZE && len) { | |
247 | page++; | |
248 | offset = 0; | |
249 | j++; | |
250 | } | |
251 | } | |
252 | ||
253 | return j + 1; | |
254 | } | |
255 | ||
8a00251a | 256 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
a9f2e2d6 KS |
257 | struct hv_netvsc_packet *packet, |
258 | struct hv_page_buffer **page_buf) | |
54a7357f | 259 | { |
a9f2e2d6 | 260 | struct hv_page_buffer *pb = *page_buf; |
54a7357f KS |
261 | u32 slots_used = 0; |
262 | char *data = skb->data; | |
263 | int frags = skb_shinfo(skb)->nr_frags; | |
264 | int i; | |
265 | ||
266 | /* The packet is laid out thus: | |
aa0a34be | 267 | * 1. hdr: RNDIS header and PPI |
54a7357f KS |
268 | * 2. skb linear data |
269 | * 3. skb fragment data | |
270 | */ | |
271 | if (hdr != NULL) | |
272 | slots_used += fill_pg_buf(virt_to_page(hdr), | |
273 | offset_in_page(hdr), | |
274 | len, &pb[slots_used]); | |
275 | ||
aa0a34be HZ |
276 | packet->rmsg_size = len; |
277 | packet->rmsg_pgcnt = slots_used; | |
278 | ||
54a7357f KS |
279 | slots_used += fill_pg_buf(virt_to_page(data), |
280 | offset_in_page(data), | |
281 | skb_headlen(skb), &pb[slots_used]); | |
282 | ||
283 | for (i = 0; i < frags; i++) { | |
284 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
285 | ||
286 | slots_used += fill_pg_buf(skb_frag_page(frag), | |
287 | frag->page_offset, | |
288 | skb_frag_size(frag), &pb[slots_used]); | |
289 | } | |
8a00251a | 290 | return slots_used; |
54a7357f KS |
291 | } |
292 | ||
293 | static int count_skb_frag_slots(struct sk_buff *skb) | |
294 | { | |
295 | int i, frags = skb_shinfo(skb)->nr_frags; | |
296 | int pages = 0; | |
297 | ||
298 | for (i = 0; i < frags; i++) { | |
299 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
300 | unsigned long size = skb_frag_size(frag); | |
301 | unsigned long offset = frag->page_offset; | |
302 | ||
303 | /* Skip unused frames from start of page */ | |
304 | offset &= ~PAGE_MASK; | |
305 | pages += PFN_UP(offset + size); | |
306 | } | |
307 | return pages; | |
308 | } | |
309 | ||
310 | static int netvsc_get_slots(struct sk_buff *skb) | |
311 | { | |
312 | char *data = skb->data; | |
313 | unsigned int offset = offset_in_page(data); | |
314 | unsigned int len = skb_headlen(skb); | |
315 | int slots; | |
316 | int frag_slots; | |
317 | ||
318 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); | |
319 | frag_slots = count_skb_frag_slots(skb); | |
320 | return slots + frag_slots; | |
321 | } | |
322 | ||
08cd04bf KS |
323 | static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off) |
324 | { | |
325 | u32 ret_val = TRANSPORT_INFO_NOT_IP; | |
326 | ||
327 | if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) && | |
328 | (eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) { | |
329 | goto not_ip; | |
330 | } | |
331 | ||
332 | *trans_off = skb_transport_offset(skb); | |
333 | ||
334 | if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) { | |
335 | struct iphdr *iphdr = ip_hdr(skb); | |
336 | ||
337 | if (iphdr->protocol == IPPROTO_TCP) | |
338 | ret_val = TRANSPORT_INFO_IPV4_TCP; | |
339 | else if (iphdr->protocol == IPPROTO_UDP) | |
340 | ret_val = TRANSPORT_INFO_IPV4_UDP; | |
341 | } else { | |
342 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) | |
343 | ret_val = TRANSPORT_INFO_IPV6_TCP; | |
344 | else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) | |
345 | ret_val = TRANSPORT_INFO_IPV6_UDP; | |
346 | } | |
347 | ||
348 | not_ip: | |
349 | return ret_val; | |
350 | } | |
351 | ||
02fafbc6 | 352 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 353 | { |
fceaf24a | 354 | struct net_device_context *net_device_ctx = netdev_priv(net); |
981a1bd8 | 355 | struct hv_netvsc_packet *packet = NULL; |
02fafbc6 | 356 | int ret; |
8a00251a KS |
357 | unsigned int num_data_pgs; |
358 | struct rndis_message *rndis_msg; | |
359 | struct rndis_packet *rndis_pkt; | |
360 | u32 rndis_msg_size; | |
361 | bool isvlan; | |
e88f7e07 | 362 | bool linear = false; |
8a00251a | 363 | struct rndis_per_packet_info *ppi; |
08cd04bf | 364 | struct ndis_tcp_ip_checksum_info *csum_info; |
77bf5487 | 365 | struct ndis_tcp_lso_info *lso_info; |
08cd04bf KS |
366 | int hdr_offset; |
367 | u32 net_trans_info; | |
307f0995 | 368 | u32 hash; |
e88f7e07 | 369 | u32 skb_length; |
b08cc791 | 370 | struct hv_page_buffer page_buf[MAX_PAGE_BUFFER_COUNT]; |
a9f2e2d6 | 371 | struct hv_page_buffer *pb = page_buf; |
7eafd9b4 | 372 | struct netvsc_stats *tx_stats = this_cpu_ptr(net_device_ctx->tx_stats); |
fceaf24a | 373 | |
54a7357f KS |
374 | /* We will atmost need two pages to describe the rndis |
375 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number | |
e88f7e07 VK |
376 | * of pages in a single packet. If skb is scattered around |
377 | * more pages we try linearizing it. | |
54a7357f | 378 | */ |
e88f7e07 VK |
379 | |
380 | check_size: | |
381 | skb_length = skb->len; | |
8a00251a | 382 | num_data_pgs = netvsc_get_slots(skb) + 2; |
e88f7e07 VK |
383 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT && linear) { |
384 | net_alert_ratelimited("packet too big: %u pages (%u bytes)\n", | |
385 | num_data_pgs, skb->len); | |
981a1bd8 VK |
386 | ret = -EFAULT; |
387 | goto drop; | |
e88f7e07 VK |
388 | } else if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { |
389 | if (skb_linearize(skb)) { | |
390 | net_alert_ratelimited("failed to linearize skb\n"); | |
391 | ret = -ENOMEM; | |
392 | goto drop; | |
393 | } | |
394 | linear = true; | |
395 | goto check_size; | |
54a7357f | 396 | } |
fceaf24a | 397 | |
c0eb4540 KS |
398 | /* |
399 | * Place the rndis header in the skb head room and | |
400 | * the skb->cb will be used for hv_netvsc_packet | |
401 | * structure. | |
402 | */ | |
403 | ret = skb_cow_head(skb, RNDIS_AND_PPI_SIZE); | |
b56fc3c5 KS |
404 | if (ret) { |
405 | netdev_err(net, "unable to alloc hv_netvsc_packet\n"); | |
406 | ret = -ENOMEM; | |
407 | goto drop; | |
fceaf24a | 408 | } |
c0eb4540 KS |
409 | /* Use the skb control buffer for building up the packet */ |
410 | BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) > | |
411 | FIELD_SIZEOF(struct sk_buff, cb)); | |
412 | packet = (struct hv_netvsc_packet *)skb->cb; | |
fceaf24a | 413 | |
1f5f3a75 | 414 | |
5b54dac8 HZ |
415 | packet->q_idx = skb_get_queue_mapping(skb); |
416 | ||
4d447c9a | 417 | packet->total_data_buflen = skb->len; |
fceaf24a | 418 | |
c0eb4540 | 419 | rndis_msg = (struct rndis_message *)skb->head; |
b08cc791 | 420 | |
24476760 | 421 | memset(rndis_msg, 0, RNDIS_AND_PPI_SIZE); |
fceaf24a | 422 | |
760d1e36 | 423 | isvlan = skb->vlan_tci & VLAN_TAG_PRESENT; |
8a00251a KS |
424 | |
425 | /* Add the rndis header */ | |
8a00251a KS |
426 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; |
427 | rndis_msg->msg_len = packet->total_data_buflen; | |
428 | rndis_pkt = &rndis_msg->msg.pkt; | |
429 | rndis_pkt->data_offset = sizeof(struct rndis_packet); | |
430 | rndis_pkt->data_len = packet->total_data_buflen; | |
431 | rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); | |
432 | ||
433 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); | |
434 | ||
307f0995 HZ |
435 | hash = skb_get_hash_raw(skb); |
436 | if (hash != 0 && net->real_num_tx_queues > 1) { | |
437 | rndis_msg_size += NDIS_HASH_PPI_SIZE; | |
438 | ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE, | |
439 | NBL_HASH_VALUE); | |
440 | *(u32 *)((void *)ppi + ppi->ppi_offset) = hash; | |
441 | } | |
442 | ||
8a00251a KS |
443 | if (isvlan) { |
444 | struct ndis_pkt_8021q_info *vlan; | |
445 | ||
446 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; | |
447 | ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, | |
448 | IEEE_8021Q_INFO); | |
449 | vlan = (struct ndis_pkt_8021q_info *)((void *)ppi + | |
450 | ppi->ppi_offset); | |
760d1e36 KS |
451 | vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK; |
452 | vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >> | |
8a00251a KS |
453 | VLAN_PRIO_SHIFT; |
454 | } | |
455 | ||
08cd04bf KS |
456 | net_trans_info = get_net_transport_info(skb, &hdr_offset); |
457 | if (net_trans_info == TRANSPORT_INFO_NOT_IP) | |
458 | goto do_send; | |
459 | ||
460 | /* | |
461 | * Setup the sendside checksum offload only if this is not a | |
462 | * GSO packet. | |
463 | */ | |
464 | if (skb_is_gso(skb)) | |
77bf5487 | 465 | goto do_lso; |
08cd04bf | 466 | |
22041fb0 KS |
467 | if ((skb->ip_summed == CHECKSUM_NONE) || |
468 | (skb->ip_summed == CHECKSUM_UNNECESSARY)) | |
469 | goto do_send; | |
470 | ||
08cd04bf KS |
471 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; |
472 | ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, | |
473 | TCPIP_CHKSUM_PKTINFO); | |
474 | ||
475 | csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + | |
476 | ppi->ppi_offset); | |
477 | ||
478 | if (net_trans_info & (INFO_IPV4 << 16)) | |
479 | csum_info->transmit.is_ipv4 = 1; | |
480 | else | |
481 | csum_info->transmit.is_ipv6 = 1; | |
482 | ||
483 | if (net_trans_info & INFO_TCP) { | |
484 | csum_info->transmit.tcp_checksum = 1; | |
485 | csum_info->transmit.tcp_header_offset = hdr_offset; | |
486 | } else if (net_trans_info & INFO_UDP) { | |
af9893a3 KS |
487 | /* UDP checksum offload is not supported on ws2008r2. |
488 | * Furthermore, on ws2012 and ws2012r2, there are some | |
489 | * issues with udp checksum offload from Linux guests. | |
490 | * (these are host issues). | |
491 | * For now compute the checksum here. | |
492 | */ | |
493 | struct udphdr *uh; | |
494 | u16 udp_len; | |
495 | ||
496 | ret = skb_cow_head(skb, 0); | |
497 | if (ret) | |
498 | goto drop; | |
499 | ||
500 | uh = udp_hdr(skb); | |
501 | udp_len = ntohs(uh->len); | |
502 | uh->check = 0; | |
503 | uh->check = csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
504 | ip_hdr(skb)->daddr, | |
505 | udp_len, IPPROTO_UDP, | |
506 | csum_partial(uh, udp_len, 0)); | |
507 | if (uh->check == 0) | |
508 | uh->check = CSUM_MANGLED_0; | |
509 | ||
510 | csum_info->transmit.udp_checksum = 0; | |
08cd04bf | 511 | } |
77bf5487 KS |
512 | goto do_send; |
513 | ||
514 | do_lso: | |
515 | rndis_msg_size += NDIS_LSO_PPI_SIZE; | |
516 | ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, | |
517 | TCP_LARGESEND_PKTINFO); | |
518 | ||
519 | lso_info = (struct ndis_tcp_lso_info *)((void *)ppi + | |
520 | ppi->ppi_offset); | |
521 | ||
522 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; | |
523 | if (net_trans_info & (INFO_IPV4 << 16)) { | |
524 | lso_info->lso_v2_transmit.ip_version = | |
525 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; | |
526 | ip_hdr(skb)->tot_len = 0; | |
527 | ip_hdr(skb)->check = 0; | |
528 | tcp_hdr(skb)->check = | |
529 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
530 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
531 | } else { | |
532 | lso_info->lso_v2_transmit.ip_version = | |
533 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; | |
534 | ipv6_hdr(skb)->payload_len = 0; | |
535 | tcp_hdr(skb)->check = | |
536 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
537 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
538 | } | |
539 | lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset; | |
540 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; | |
08cd04bf KS |
541 | |
542 | do_send: | |
8a00251a KS |
543 | /* Start filling in the page buffers with the rndis hdr */ |
544 | rndis_msg->msg_len += rndis_msg_size; | |
942396b0 | 545 | packet->total_data_buflen = rndis_msg->msg_len; |
8a00251a | 546 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, |
a9f2e2d6 | 547 | skb, packet, &pb); |
8a00251a | 548 | |
76d13b56 | 549 | /* timestamp packet in software */ |
550 | skb_tx_timestamp(skb); | |
3a3d9a0a KS |
551 | ret = netvsc_send(net_device_ctx->device_ctx, packet, |
552 | rndis_msg, &pb, skb); | |
8a00251a | 553 | |
af9893a3 | 554 | drop: |
02fafbc6 | 555 | if (ret == 0) { |
4b02b58b | 556 | u64_stats_update_begin(&tx_stats->syncp); |
7eafd9b4 | 557 | tx_stats->packets++; |
558 | tx_stats->bytes += skb_length; | |
4b02b58b | 559 | u64_stats_update_end(&tx_stats->syncp); |
b220f5f9 | 560 | } else { |
33be96e4 HZ |
561 | if (ret != -EAGAIN) { |
562 | dev_kfree_skb_any(skb); | |
563 | net->stats.tx_dropped++; | |
564 | } | |
fceaf24a HJ |
565 | } |
566 | ||
33be96e4 | 567 | return (ret == -EAGAIN) ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
fceaf24a HJ |
568 | } |
569 | ||
3e189519 | 570 | /* |
02fafbc6 GKH |
571 | * netvsc_linkstatus_callback - Link up/down notification |
572 | */ | |
90ef117a | 573 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
3a494e71 | 574 | struct rndis_message *resp) |
fceaf24a | 575 | { |
3a494e71 | 576 | struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
2ddd5e5f | 577 | struct net_device *net; |
c996edcf | 578 | struct net_device_context *ndev_ctx; |
27a70af3 VK |
579 | struct netvsc_reconfig *event; |
580 | unsigned long flags; | |
891de74d | 581 | |
7f5d5af0 HZ |
582 | net = hv_get_drvdata(device_obj); |
583 | ||
584 | if (!net) | |
585 | return; | |
586 | ||
587 | ndev_ctx = netdev_priv(net); | |
588 | ||
589 | /* Update the physical link speed when changing to another vSwitch */ | |
590 | if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) { | |
591 | u32 speed; | |
592 | ||
593 | speed = *(u32 *)((void *)indicate + indicate-> | |
594 | status_buf_offset) / 10000; | |
595 | ndev_ctx->speed = speed; | |
596 | return; | |
597 | } | |
598 | ||
599 | /* Handle these link change statuses below */ | |
27a70af3 VK |
600 | if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE && |
601 | indicate->status != RNDIS_STATUS_MEDIA_CONNECT && | |
602 | indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT) | |
3a494e71 | 603 | return; |
891de74d | 604 | |
7f5d5af0 | 605 | if (net->reg_state != NETREG_REGISTERED) |
fceaf24a | 606 | return; |
fceaf24a | 607 | |
27a70af3 VK |
608 | event = kzalloc(sizeof(*event), GFP_ATOMIC); |
609 | if (!event) | |
610 | return; | |
611 | event->event = indicate->status; | |
612 | ||
613 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
614 | list_add_tail(&event->list, &ndev_ctx->reconfig_events); | |
615 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
616 | ||
617 | schedule_delayed_work(&ndev_ctx->dwork, 0); | |
fceaf24a HJ |
618 | } |
619 | ||
84bf9cef KS |
620 | |
621 | static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net, | |
e3d605ed | 622 | struct hv_netvsc_packet *packet, |
25b85ee8 | 623 | struct ndis_tcp_ip_checksum_info *csum_info, |
84bf9cef | 624 | void *data, u16 vlan_tci) |
fceaf24a | 625 | { |
fceaf24a | 626 | struct sk_buff *skb; |
fceaf24a | 627 | |
72a2f5bd | 628 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
84bf9cef KS |
629 | if (!skb) |
630 | return skb; | |
fceaf24a | 631 | |
02fafbc6 GKH |
632 | /* |
633 | * Copy to skb. This copy is needed here since the memory pointed by | |
634 | * hv_netvsc_packet cannot be deallocated | |
635 | */ | |
84bf9cef KS |
636 | memcpy(skb_put(skb, packet->total_data_buflen), data, |
637 | packet->total_data_buflen); | |
fceaf24a HJ |
638 | |
639 | skb->protocol = eth_type_trans(skb, net); | |
e3d605ed KS |
640 | if (csum_info) { |
641 | /* We only look at the IP checksum here. | |
642 | * Should we be dropping the packet if checksum | |
643 | * failed? How do we deal with other checksums - TCP/UDP? | |
644 | */ | |
645 | if (csum_info->receive.ip_checksum_succeeded) | |
646 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
647 | else | |
648 | skb->ip_summed = CHECKSUM_NONE; | |
649 | } | |
650 | ||
760d1e36 | 651 | if (vlan_tci & VLAN_TAG_PRESENT) |
93725cbd | 652 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
760d1e36 | 653 | vlan_tci); |
fceaf24a | 654 | |
84bf9cef KS |
655 | return skb; |
656 | } | |
657 | ||
658 | /* | |
659 | * netvsc_recv_callback - Callback when we receive a packet from the | |
660 | * "wire" on the specified device. | |
661 | */ | |
662 | int netvsc_recv_callback(struct hv_device *device_obj, | |
663 | struct hv_netvsc_packet *packet, | |
664 | void **data, | |
665 | struct ndis_tcp_ip_checksum_info *csum_info, | |
666 | struct vmbus_channel *channel, | |
667 | u16 vlan_tci) | |
668 | { | |
3d541ac5 VK |
669 | struct net_device *net = hv_get_drvdata(device_obj); |
670 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
84bf9cef KS |
671 | struct sk_buff *skb; |
672 | struct sk_buff *vf_skb; | |
673 | struct netvsc_stats *rx_stats; | |
84bf9cef KS |
674 | u32 bytes_recvd = packet->total_data_buflen; |
675 | int ret = 0; | |
676 | ||
84bf9cef KS |
677 | if (!net || net->reg_state != NETREG_REGISTERED) |
678 | return NVSP_STAT_FAIL; | |
679 | ||
f9a7da91 VK |
680 | if (READ_ONCE(net_device_ctx->vf_inject)) { |
681 | atomic_inc(&net_device_ctx->vf_use_cnt); | |
682 | if (!READ_ONCE(net_device_ctx->vf_inject)) { | |
84bf9cef KS |
683 | /* |
684 | * We raced; just move on. | |
685 | */ | |
f9a7da91 | 686 | atomic_dec(&net_device_ctx->vf_use_cnt); |
84bf9cef KS |
687 | goto vf_injection_done; |
688 | } | |
689 | ||
690 | /* | |
691 | * Inject this packet into the VF inerface. | |
692 | * On Hyper-V, multicast and brodcast packets | |
693 | * are only delivered on the synthetic interface | |
694 | * (after subjecting these to policy filters on | |
695 | * the host). Deliver these via the VF interface | |
696 | * in the guest. | |
697 | */ | |
f9a7da91 VK |
698 | vf_skb = netvsc_alloc_recv_skb(net_device_ctx->vf_netdev, |
699 | packet, csum_info, *data, | |
700 | vlan_tci); | |
84bf9cef | 701 | if (vf_skb != NULL) { |
f9a7da91 VK |
702 | ++net_device_ctx->vf_netdev->stats.rx_packets; |
703 | net_device_ctx->vf_netdev->stats.rx_bytes += | |
704 | bytes_recvd; | |
84bf9cef KS |
705 | netif_receive_skb(vf_skb); |
706 | } else { | |
707 | ++net->stats.rx_dropped; | |
708 | ret = NVSP_STAT_FAIL; | |
709 | } | |
f9a7da91 | 710 | atomic_dec(&net_device_ctx->vf_use_cnt); |
84bf9cef KS |
711 | return ret; |
712 | } | |
713 | ||
714 | vf_injection_done: | |
84bf9cef KS |
715 | rx_stats = this_cpu_ptr(net_device_ctx->rx_stats); |
716 | ||
717 | /* Allocate a skb - TODO direct I/O to pages? */ | |
718 | skb = netvsc_alloc_recv_skb(net, packet, csum_info, *data, vlan_tci); | |
719 | if (unlikely(!skb)) { | |
720 | ++net->stats.rx_dropped; | |
721 | return NVSP_STAT_FAIL; | |
722 | } | |
25b85ee8 | 723 | skb_record_rx_queue(skb, channel-> |
e565e803 | 724 | offermsg.offer.sub_channel_index); |
5b54dac8 | 725 | |
4b02b58b | 726 | u64_stats_update_begin(&rx_stats->syncp); |
7eafd9b4 | 727 | rx_stats->packets++; |
728 | rx_stats->bytes += packet->total_data_buflen; | |
4b02b58b | 729 | u64_stats_update_end(&rx_stats->syncp); |
9495c282 | 730 | |
02fafbc6 GKH |
731 | /* |
732 | * Pass the skb back up. Network stack will deallocate the skb when it | |
9495c282 SH |
733 | * is done. |
734 | * TODO - use NAPI? | |
02fafbc6 | 735 | */ |
9495c282 | 736 | netif_rx(skb); |
fceaf24a | 737 | |
fceaf24a HJ |
738 | return 0; |
739 | } | |
740 | ||
f82f4ad7 SH |
741 | static void netvsc_get_drvinfo(struct net_device *net, |
742 | struct ethtool_drvinfo *info) | |
743 | { | |
7826d43f | 744 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 745 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
f82f4ad7 SH |
746 | } |
747 | ||
59995370 AS |
748 | static void netvsc_get_channels(struct net_device *net, |
749 | struct ethtool_channels *channel) | |
750 | { | |
751 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
3d541ac5 | 752 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
59995370 AS |
753 | |
754 | if (nvdev) { | |
755 | channel->max_combined = nvdev->max_chn; | |
756 | channel->combined_count = nvdev->num_chn; | |
757 | } | |
758 | } | |
759 | ||
b5960e6e AS |
760 | static int netvsc_set_channels(struct net_device *net, |
761 | struct ethtool_channels *channels) | |
762 | { | |
763 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
764 | struct hv_device *dev = net_device_ctx->device_ctx; | |
3d541ac5 | 765 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
b5960e6e | 766 | struct netvsc_device_info device_info; |
954591b9 AS |
767 | u32 num_chn; |
768 | u32 max_chn; | |
b5960e6e AS |
769 | int ret = 0; |
770 | bool recovering = false; | |
771 | ||
6da7225f | 772 | if (net_device_ctx->start_remove || !nvdev || nvdev->destroy) |
b5960e6e AS |
773 | return -ENODEV; |
774 | ||
954591b9 AS |
775 | num_chn = nvdev->num_chn; |
776 | max_chn = min_t(u32, nvdev->max_chn, num_online_cpus()); | |
777 | ||
b5960e6e AS |
778 | if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) { |
779 | pr_info("vRSS unsupported before NVSP Version 5\n"); | |
780 | return -EINVAL; | |
781 | } | |
782 | ||
783 | /* We do not support rx, tx, or other */ | |
784 | if (!channels || | |
785 | channels->rx_count || | |
786 | channels->tx_count || | |
787 | channels->other_count || | |
788 | (channels->combined_count < 1)) | |
789 | return -EINVAL; | |
790 | ||
791 | if (channels->combined_count > max_chn) { | |
792 | pr_info("combined channels too high, using %d\n", max_chn); | |
793 | channels->combined_count = max_chn; | |
794 | } | |
795 | ||
796 | ret = netvsc_close(net); | |
797 | if (ret) | |
798 | goto out; | |
799 | ||
800 | do_set: | |
f580aec4 | 801 | net_device_ctx->start_remove = true; |
b5960e6e AS |
802 | rndis_filter_device_remove(dev); |
803 | ||
804 | nvdev->num_chn = channels->combined_count; | |
805 | ||
b5960e6e AS |
806 | memset(&device_info, 0, sizeof(device_info)); |
807 | device_info.num_chn = nvdev->num_chn; /* passed to RNDIS */ | |
808 | device_info.ring_size = ring_size; | |
809 | device_info.max_num_vrss_chns = max_num_vrss_chns; | |
810 | ||
811 | ret = rndis_filter_device_add(dev, &device_info); | |
812 | if (ret) { | |
813 | if (recovering) { | |
814 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
815 | return ret; | |
816 | } | |
817 | goto recover; | |
818 | } | |
819 | ||
3d541ac5 | 820 | nvdev = net_device_ctx->nvdev; |
b5960e6e AS |
821 | |
822 | ret = netif_set_real_num_tx_queues(net, nvdev->num_chn); | |
823 | if (ret) { | |
824 | if (recovering) { | |
825 | netdev_err(net, "could not set tx queue count (ret %d)\n", ret); | |
826 | return ret; | |
827 | } | |
828 | goto recover; | |
829 | } | |
830 | ||
831 | ret = netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
832 | if (ret) { | |
833 | if (recovering) { | |
834 | netdev_err(net, "could not set rx queue count (ret %d)\n", ret); | |
835 | return ret; | |
836 | } | |
837 | goto recover; | |
838 | } | |
839 | ||
840 | out: | |
841 | netvsc_open(net); | |
f580aec4 | 842 | net_device_ctx->start_remove = false; |
1bdcec8a VK |
843 | /* We may have missed link change notifications */ |
844 | schedule_delayed_work(&net_device_ctx->dwork, 0); | |
b5960e6e AS |
845 | |
846 | return ret; | |
847 | ||
848 | recover: | |
849 | /* If the above failed, we attempt to recover through the same | |
850 | * process but with the original number of channels. | |
851 | */ | |
852 | netdev_err(net, "could not set channels, recovering\n"); | |
853 | recovering = true; | |
854 | channels->combined_count = num_chn; | |
855 | goto do_set; | |
856 | } | |
857 | ||
49eb9389 | 858 | static bool netvsc_validate_ethtool_ss_cmd(const struct ethtool_cmd *cmd) |
859 | { | |
860 | struct ethtool_cmd diff1 = *cmd; | |
861 | struct ethtool_cmd diff2 = {}; | |
862 | ||
863 | ethtool_cmd_speed_set(&diff1, 0); | |
864 | diff1.duplex = 0; | |
865 | /* advertising and cmd are usually set */ | |
866 | diff1.advertising = 0; | |
867 | diff1.cmd = 0; | |
868 | /* We set port to PORT_OTHER */ | |
869 | diff2.port = PORT_OTHER; | |
870 | ||
871 | return !memcmp(&diff1, &diff2, sizeof(diff1)); | |
872 | } | |
873 | ||
874 | static void netvsc_init_settings(struct net_device *dev) | |
875 | { | |
876 | struct net_device_context *ndc = netdev_priv(dev); | |
877 | ||
878 | ndc->speed = SPEED_UNKNOWN; | |
879 | ndc->duplex = DUPLEX_UNKNOWN; | |
880 | } | |
881 | ||
882 | static int netvsc_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
883 | { | |
884 | struct net_device_context *ndc = netdev_priv(dev); | |
885 | ||
886 | ethtool_cmd_speed_set(cmd, ndc->speed); | |
887 | cmd->duplex = ndc->duplex; | |
888 | cmd->port = PORT_OTHER; | |
889 | ||
890 | return 0; | |
891 | } | |
892 | ||
893 | static int netvsc_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
894 | { | |
895 | struct net_device_context *ndc = netdev_priv(dev); | |
896 | u32 speed; | |
897 | ||
898 | speed = ethtool_cmd_speed(cmd); | |
899 | if (!ethtool_validate_speed(speed) || | |
900 | !ethtool_validate_duplex(cmd->duplex) || | |
901 | !netvsc_validate_ethtool_ss_cmd(cmd)) | |
902 | return -EINVAL; | |
903 | ||
904 | ndc->speed = speed; | |
905 | ndc->duplex = cmd->duplex; | |
906 | ||
907 | return 0; | |
908 | } | |
909 | ||
4d447c9a HZ |
910 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
911 | { | |
912 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
3d541ac5 VK |
913 | struct netvsc_device *nvdev = ndevctx->nvdev; |
914 | struct hv_device *hdev = ndevctx->device_ctx; | |
4d447c9a HZ |
915 | struct netvsc_device_info device_info; |
916 | int limit = ETH_DATA_LEN; | |
d212b463 | 917 | u32 num_chn; |
2de8530b | 918 | int ret = 0; |
4d447c9a | 919 | |
6da7225f | 920 | if (ndevctx->start_remove || !nvdev || nvdev->destroy) |
4d447c9a HZ |
921 | return -ENODEV; |
922 | ||
a1eabb01 | 923 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) |
4d3c9d37 | 924 | limit = NETVSC_MTU - ETH_HLEN; |
4d447c9a | 925 | |
f9cbce34 | 926 | if (mtu < NETVSC_MTU_MIN || mtu > limit) |
4d447c9a HZ |
927 | return -EINVAL; |
928 | ||
2de8530b HZ |
929 | ret = netvsc_close(ndev); |
930 | if (ret) | |
931 | goto out; | |
932 | ||
d212b463 HZ |
933 | num_chn = nvdev->num_chn; |
934 | ||
f580aec4 | 935 | ndevctx->start_remove = true; |
4d447c9a HZ |
936 | rndis_filter_device_remove(hdev); |
937 | ||
938 | ndev->mtu = mtu; | |
939 | ||
8ebdcc52 | 940 | memset(&device_info, 0, sizeof(device_info)); |
4d447c9a | 941 | device_info.ring_size = ring_size; |
d212b463 | 942 | device_info.num_chn = num_chn; |
e01ec219 | 943 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
4d447c9a | 944 | rndis_filter_device_add(hdev, &device_info); |
4d447c9a | 945 | |
2de8530b HZ |
946 | out: |
947 | netvsc_open(ndev); | |
f580aec4 | 948 | ndevctx->start_remove = false; |
2de8530b | 949 | |
1bdcec8a VK |
950 | /* We may have missed link change notifications */ |
951 | schedule_delayed_work(&ndevctx->dwork, 0); | |
952 | ||
2de8530b | 953 | return ret; |
4d447c9a HZ |
954 | } |
955 | ||
7eafd9b4 | 956 | static struct rtnl_link_stats64 *netvsc_get_stats64(struct net_device *net, |
957 | struct rtnl_link_stats64 *t) | |
958 | { | |
959 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
960 | int cpu; | |
961 | ||
962 | for_each_possible_cpu(cpu) { | |
963 | struct netvsc_stats *tx_stats = per_cpu_ptr(ndev_ctx->tx_stats, | |
964 | cpu); | |
965 | struct netvsc_stats *rx_stats = per_cpu_ptr(ndev_ctx->rx_stats, | |
966 | cpu); | |
967 | u64 tx_packets, tx_bytes, rx_packets, rx_bytes; | |
968 | unsigned int start; | |
969 | ||
970 | do { | |
4b02b58b | 971 | start = u64_stats_fetch_begin_irq(&tx_stats->syncp); |
7eafd9b4 | 972 | tx_packets = tx_stats->packets; |
973 | tx_bytes = tx_stats->bytes; | |
4b02b58b | 974 | } while (u64_stats_fetch_retry_irq(&tx_stats->syncp, start)); |
7eafd9b4 | 975 | |
976 | do { | |
4b02b58b | 977 | start = u64_stats_fetch_begin_irq(&rx_stats->syncp); |
7eafd9b4 | 978 | rx_packets = rx_stats->packets; |
979 | rx_bytes = rx_stats->bytes; | |
4b02b58b | 980 | } while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start)); |
7eafd9b4 | 981 | |
982 | t->tx_bytes += tx_bytes; | |
983 | t->tx_packets += tx_packets; | |
984 | t->rx_bytes += rx_bytes; | |
985 | t->rx_packets += rx_packets; | |
986 | } | |
987 | ||
988 | t->tx_dropped = net->stats.tx_dropped; | |
989 | t->tx_errors = net->stats.tx_dropped; | |
990 | ||
991 | t->rx_dropped = net->stats.rx_dropped; | |
992 | t->rx_errors = net->stats.rx_errors; | |
993 | ||
994 | return t; | |
995 | } | |
1ce09e89 HZ |
996 | |
997 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
998 | { | |
1ce09e89 | 999 | struct sockaddr *addr = p; |
9a4c831e | 1000 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
1001 | unsigned char save_aatype; |
1002 | int err; | |
1003 | ||
1004 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
1005 | save_aatype = ndev->addr_assign_type; | |
1006 | ||
1007 | err = eth_mac_addr(ndev, p); | |
1008 | if (err != 0) | |
1009 | return err; | |
1010 | ||
e834da9a | 1011 | err = rndis_filter_set_device_mac(ndev, addr->sa_data); |
1ce09e89 HZ |
1012 | if (err != 0) { |
1013 | /* roll back to saved MAC */ | |
1014 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
1015 | ndev->addr_assign_type = save_aatype; | |
1016 | } | |
1017 | ||
1018 | return err; | |
1019 | } | |
1020 | ||
316158fe RW |
1021 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1022 | static void netvsc_poll_controller(struct net_device *net) | |
1023 | { | |
1024 | /* As netvsc_start_xmit() works synchronous we don't have to | |
1025 | * trigger anything here. | |
1026 | */ | |
1027 | } | |
1028 | #endif | |
1ce09e89 | 1029 | |
f82f4ad7 SH |
1030 | static const struct ethtool_ops ethtool_ops = { |
1031 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 | 1032 | .get_link = ethtool_op_get_link, |
59995370 | 1033 | .get_channels = netvsc_get_channels, |
b5960e6e | 1034 | .set_channels = netvsc_set_channels, |
76d13b56 | 1035 | .get_ts_info = ethtool_op_get_ts_info, |
49eb9389 | 1036 | .get_settings = netvsc_get_settings, |
1037 | .set_settings = netvsc_set_settings, | |
f82f4ad7 SH |
1038 | }; |
1039 | ||
df2fff28 GKH |
1040 | static const struct net_device_ops device_ops = { |
1041 | .ndo_open = netvsc_open, | |
1042 | .ndo_stop = netvsc_close, | |
1043 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 1044 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 1045 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 1046 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 1047 | .ndo_set_mac_address = netvsc_set_mac_addr, |
5b54dac8 | 1048 | .ndo_select_queue = netvsc_select_queue, |
7eafd9b4 | 1049 | .ndo_get_stats64 = netvsc_get_stats64, |
316158fe RW |
1050 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1051 | .ndo_poll_controller = netvsc_poll_controller, | |
1052 | #endif | |
df2fff28 GKH |
1053 | }; |
1054 | ||
c996edcf | 1055 | /* |
27a70af3 VK |
1056 | * Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link |
1057 | * down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is | |
1058 | * present send GARP packet to network peers with netif_notify_peers(). | |
c996edcf | 1059 | */ |
891de74d | 1060 | static void netvsc_link_change(struct work_struct *w) |
c996edcf | 1061 | { |
0a1275ca VK |
1062 | struct net_device_context *ndev_ctx = |
1063 | container_of(w, struct net_device_context, dwork.work); | |
1064 | struct hv_device *device_obj = ndev_ctx->device_ctx; | |
1065 | struct net_device *net = hv_get_drvdata(device_obj); | |
2ddd5e5f | 1066 | struct netvsc_device *net_device; |
891de74d | 1067 | struct rndis_device *rdev; |
27a70af3 VK |
1068 | struct netvsc_reconfig *event = NULL; |
1069 | bool notify = false, reschedule = false; | |
1070 | unsigned long flags, next_reconfig, delay; | |
c996edcf | 1071 | |
1bdcec8a VK |
1072 | rtnl_lock(); |
1073 | if (ndev_ctx->start_remove) | |
1074 | goto out_unlock; | |
1075 | ||
3d541ac5 | 1076 | net_device = ndev_ctx->nvdev; |
891de74d | 1077 | rdev = net_device->extension; |
891de74d | 1078 | |
27a70af3 VK |
1079 | next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT; |
1080 | if (time_is_after_jiffies(next_reconfig)) { | |
1081 | /* link_watch only sends one notification with current state | |
1082 | * per second, avoid doing reconfig more frequently. Handle | |
1083 | * wrap around. | |
1084 | */ | |
1085 | delay = next_reconfig - jiffies; | |
1086 | delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT; | |
1087 | schedule_delayed_work(&ndev_ctx->dwork, delay); | |
1bdcec8a | 1088 | goto out_unlock; |
27a70af3 VK |
1089 | } |
1090 | ndev_ctx->last_reconfig = jiffies; | |
1091 | ||
1092 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
1093 | if (!list_empty(&ndev_ctx->reconfig_events)) { | |
1094 | event = list_first_entry(&ndev_ctx->reconfig_events, | |
1095 | struct netvsc_reconfig, list); | |
1096 | list_del(&event->list); | |
1097 | reschedule = !list_empty(&ndev_ctx->reconfig_events); | |
1098 | } | |
1099 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
1100 | ||
1101 | if (!event) | |
1bdcec8a | 1102 | goto out_unlock; |
27a70af3 VK |
1103 | |
1104 | switch (event->event) { | |
1105 | /* Only the following events are possible due to the check in | |
1106 | * netvsc_linkstatus_callback() | |
1107 | */ | |
1108 | case RNDIS_STATUS_MEDIA_CONNECT: | |
1109 | if (rdev->link_state) { | |
1110 | rdev->link_state = false; | |
1111 | netif_carrier_on(net); | |
1112 | netif_tx_wake_all_queues(net); | |
1113 | } else { | |
1114 | notify = true; | |
1115 | } | |
1116 | kfree(event); | |
1117 | break; | |
1118 | case RNDIS_STATUS_MEDIA_DISCONNECT: | |
1119 | if (!rdev->link_state) { | |
1120 | rdev->link_state = true; | |
1121 | netif_carrier_off(net); | |
1122 | netif_tx_stop_all_queues(net); | |
1123 | } | |
1124 | kfree(event); | |
1125 | break; | |
1126 | case RNDIS_STATUS_NETWORK_CHANGE: | |
1127 | /* Only makes sense if carrier is present */ | |
1128 | if (!rdev->link_state) { | |
1129 | rdev->link_state = true; | |
1130 | netif_carrier_off(net); | |
1131 | netif_tx_stop_all_queues(net); | |
1132 | event->event = RNDIS_STATUS_MEDIA_CONNECT; | |
1133 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
15cfd407 | 1134 | list_add(&event->list, &ndev_ctx->reconfig_events); |
27a70af3 VK |
1135 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
1136 | reschedule = true; | |
3a494e71 | 1137 | } |
27a70af3 | 1138 | break; |
891de74d HZ |
1139 | } |
1140 | ||
1141 | rtnl_unlock(); | |
1142 | ||
1143 | if (notify) | |
1144 | netdev_notify_peers(net); | |
27a70af3 VK |
1145 | |
1146 | /* link_watch only sends one notification with current state per | |
1147 | * second, handle next reconfig event in 2 seconds. | |
1148 | */ | |
1149 | if (reschedule) | |
1150 | schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); | |
1bdcec8a VK |
1151 | |
1152 | return; | |
1153 | ||
1154 | out_unlock: | |
1155 | rtnl_unlock(); | |
c996edcf HZ |
1156 | } |
1157 | ||
7eafd9b4 | 1158 | static void netvsc_free_netdev(struct net_device *netdev) |
1159 | { | |
1160 | struct net_device_context *net_device_ctx = netdev_priv(netdev); | |
1161 | ||
1162 | free_percpu(net_device_ctx->tx_stats); | |
1163 | free_percpu(net_device_ctx->rx_stats); | |
1164 | free_netdev(netdev); | |
1165 | } | |
c996edcf | 1166 | |
0a1275ca | 1167 | static struct net_device *get_netvsc_net_device(char *mac) |
84bf9cef | 1168 | { |
0a1275ca | 1169 | struct net_device *dev, *found = NULL; |
84bf9cef KS |
1170 | int rtnl_locked; |
1171 | ||
1172 | rtnl_locked = rtnl_trylock(); | |
1173 | ||
1174 | for_each_netdev(&init_net, dev) { | |
1175 | if (memcmp(dev->dev_addr, mac, ETH_ALEN) == 0) { | |
1176 | if (dev->netdev_ops != &device_ops) | |
1177 | continue; | |
0a1275ca | 1178 | found = dev; |
84bf9cef KS |
1179 | break; |
1180 | } | |
1181 | } | |
1182 | if (rtnl_locked) | |
1183 | rtnl_unlock(); | |
1184 | ||
0a1275ca | 1185 | return found; |
84bf9cef KS |
1186 | } |
1187 | ||
1188 | static int netvsc_register_vf(struct net_device *vf_netdev) | |
1189 | { | |
0a1275ca VK |
1190 | struct net_device *ndev; |
1191 | struct net_device_context *net_device_ctx; | |
84bf9cef KS |
1192 | struct netvsc_device *netvsc_dev; |
1193 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
1194 | ||
1195 | if (eth_ops == NULL || eth_ops == ðtool_ops) | |
1196 | return NOTIFY_DONE; | |
1197 | ||
1198 | /* | |
1199 | * We will use the MAC address to locate the synthetic interface to | |
1200 | * associate with the VF interface. If we don't find a matching | |
1201 | * synthetic interface, move on. | |
1202 | */ | |
0a1275ca VK |
1203 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1204 | if (!ndev) | |
1205 | return NOTIFY_DONE; | |
1206 | ||
1207 | net_device_ctx = netdev_priv(ndev); | |
1208 | netvsc_dev = net_device_ctx->nvdev; | |
0f20d795 | 1209 | if (!netvsc_dev || net_device_ctx->vf_netdev) |
84bf9cef KS |
1210 | return NOTIFY_DONE; |
1211 | ||
0a1275ca | 1212 | netdev_info(ndev, "VF registering: %s\n", vf_netdev->name); |
84bf9cef KS |
1213 | /* |
1214 | * Take a reference on the module. | |
1215 | */ | |
1216 | try_module_get(THIS_MODULE); | |
f9a7da91 | 1217 | net_device_ctx->vf_netdev = vf_netdev; |
84bf9cef KS |
1218 | return NOTIFY_OK; |
1219 | } | |
1220 | ||
57c1826b VK |
1221 | static void netvsc_inject_enable(struct net_device_context *net_device_ctx) |
1222 | { | |
1223 | net_device_ctx->vf_inject = true; | |
1224 | } | |
1225 | ||
1226 | static void netvsc_inject_disable(struct net_device_context *net_device_ctx) | |
1227 | { | |
1228 | net_device_ctx->vf_inject = false; | |
1229 | ||
1230 | /* Wait for currently active users to drain out. */ | |
1231 | while (atomic_read(&net_device_ctx->vf_use_cnt) != 0) | |
1232 | udelay(50); | |
1233 | } | |
84bf9cef KS |
1234 | |
1235 | static int netvsc_vf_up(struct net_device *vf_netdev) | |
1236 | { | |
0a1275ca | 1237 | struct net_device *ndev; |
84bf9cef KS |
1238 | struct netvsc_device *netvsc_dev; |
1239 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
1240 | struct net_device_context *net_device_ctx; | |
1241 | ||
1242 | if (eth_ops == ðtool_ops) | |
1243 | return NOTIFY_DONE; | |
1244 | ||
0a1275ca VK |
1245 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1246 | if (!ndev) | |
1247 | return NOTIFY_DONE; | |
1248 | ||
1249 | net_device_ctx = netdev_priv(ndev); | |
1250 | netvsc_dev = net_device_ctx->nvdev; | |
84bf9cef | 1251 | |
f9a7da91 | 1252 | if (!netvsc_dev || !net_device_ctx->vf_netdev) |
84bf9cef KS |
1253 | return NOTIFY_DONE; |
1254 | ||
0a1275ca | 1255 | netdev_info(ndev, "VF up: %s\n", vf_netdev->name); |
57c1826b | 1256 | netvsc_inject_enable(net_device_ctx); |
84bf9cef KS |
1257 | |
1258 | /* | |
1259 | * Open the device before switching data path. | |
1260 | */ | |
2f5fa6c8 | 1261 | rndis_filter_open(netvsc_dev); |
84bf9cef KS |
1262 | |
1263 | /* | |
1264 | * notify the host to switch the data path. | |
1265 | */ | |
0a1275ca VK |
1266 | netvsc_switch_datapath(ndev, true); |
1267 | netdev_info(ndev, "Data path switched to VF: %s\n", vf_netdev->name); | |
84bf9cef | 1268 | |
0a1275ca | 1269 | netif_carrier_off(ndev); |
84bf9cef | 1270 | |
d072218f VK |
1271 | /* Now notify peers through VF device. */ |
1272 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, vf_netdev); | |
84bf9cef KS |
1273 | |
1274 | return NOTIFY_OK; | |
1275 | } | |
1276 | ||
1277 | ||
1278 | static int netvsc_vf_down(struct net_device *vf_netdev) | |
1279 | { | |
0a1275ca | 1280 | struct net_device *ndev; |
84bf9cef KS |
1281 | struct netvsc_device *netvsc_dev; |
1282 | struct net_device_context *net_device_ctx; | |
1283 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
1284 | ||
1285 | if (eth_ops == ðtool_ops) | |
1286 | return NOTIFY_DONE; | |
1287 | ||
0a1275ca VK |
1288 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1289 | if (!ndev) | |
1290 | return NOTIFY_DONE; | |
1291 | ||
1292 | net_device_ctx = netdev_priv(ndev); | |
1293 | netvsc_dev = net_device_ctx->nvdev; | |
84bf9cef | 1294 | |
f9a7da91 | 1295 | if (!netvsc_dev || !net_device_ctx->vf_netdev) |
84bf9cef KS |
1296 | return NOTIFY_DONE; |
1297 | ||
0a1275ca | 1298 | netdev_info(ndev, "VF down: %s\n", vf_netdev->name); |
57c1826b | 1299 | netvsc_inject_disable(net_device_ctx); |
0a1275ca VK |
1300 | netvsc_switch_datapath(ndev, false); |
1301 | netdev_info(ndev, "Data path switched from VF: %s\n", vf_netdev->name); | |
2f5fa6c8 | 1302 | rndis_filter_close(netvsc_dev); |
0a1275ca | 1303 | netif_carrier_on(ndev); |
d072218f VK |
1304 | |
1305 | /* Now notify peers through netvsc device. */ | |
1306 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, ndev); | |
84bf9cef KS |
1307 | |
1308 | return NOTIFY_OK; | |
1309 | } | |
1310 | ||
1311 | ||
1312 | static int netvsc_unregister_vf(struct net_device *vf_netdev) | |
1313 | { | |
0a1275ca | 1314 | struct net_device *ndev; |
84bf9cef KS |
1315 | struct netvsc_device *netvsc_dev; |
1316 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
0a1275ca | 1317 | struct net_device_context *net_device_ctx; |
84bf9cef KS |
1318 | |
1319 | if (eth_ops == ðtool_ops) | |
1320 | return NOTIFY_DONE; | |
1321 | ||
0a1275ca VK |
1322 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1323 | if (!ndev) | |
1324 | return NOTIFY_DONE; | |
1325 | ||
1326 | net_device_ctx = netdev_priv(ndev); | |
1327 | netvsc_dev = net_device_ctx->nvdev; | |
0f20d795 | 1328 | if (!netvsc_dev || !net_device_ctx->vf_netdev) |
84bf9cef | 1329 | return NOTIFY_DONE; |
0a1275ca | 1330 | netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); |
57c1826b | 1331 | netvsc_inject_disable(net_device_ctx); |
f9a7da91 | 1332 | net_device_ctx->vf_netdev = NULL; |
84bf9cef KS |
1333 | module_put(THIS_MODULE); |
1334 | return NOTIFY_OK; | |
1335 | } | |
1336 | ||
84946899 S |
1337 | static int netvsc_probe(struct hv_device *dev, |
1338 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 1339 | { |
df2fff28 GKH |
1340 | struct net_device *net = NULL; |
1341 | struct net_device_context *net_device_ctx; | |
1342 | struct netvsc_device_info device_info; | |
5b54dac8 | 1343 | struct netvsc_device *nvdev; |
df2fff28 GKH |
1344 | int ret; |
1345 | ||
5b54dac8 HZ |
1346 | net = alloc_etherdev_mq(sizeof(struct net_device_context), |
1347 | num_online_cpus()); | |
df2fff28 | 1348 | if (!net) |
51a805d0 | 1349 | return -ENOMEM; |
df2fff28 | 1350 | |
1b07da51 HZ |
1351 | netif_carrier_off(net); |
1352 | ||
b37879e6 HZ |
1353 | netvsc_init_settings(net); |
1354 | ||
df2fff28 | 1355 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 1356 | net_device_ctx->device_ctx = dev; |
3f300ff4 SX |
1357 | net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); |
1358 | if (netif_msg_probe(net_device_ctx)) | |
1359 | netdev_dbg(net, "netvsc msg_enable: %d\n", | |
1360 | net_device_ctx->msg_enable); | |
1361 | ||
7eafd9b4 | 1362 | net_device_ctx->tx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); |
1363 | if (!net_device_ctx->tx_stats) { | |
1364 | free_netdev(net); | |
1365 | return -ENOMEM; | |
1366 | } | |
1367 | net_device_ctx->rx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); | |
1368 | if (!net_device_ctx->rx_stats) { | |
1369 | free_percpu(net_device_ctx->tx_stats); | |
1370 | free_netdev(net); | |
1371 | return -ENOMEM; | |
1372 | } | |
1373 | ||
2ddd5e5f | 1374 | hv_set_drvdata(dev, net); |
f580aec4 VK |
1375 | |
1376 | net_device_ctx->start_remove = false; | |
1377 | ||
891de74d | 1378 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
792df872 | 1379 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
df2fff28 | 1380 | |
27a70af3 VK |
1381 | spin_lock_init(&net_device_ctx->lock); |
1382 | INIT_LIST_HEAD(&net_device_ctx->reconfig_events); | |
1383 | ||
f9a7da91 VK |
1384 | atomic_set(&net_device_ctx->vf_use_cnt, 0); |
1385 | net_device_ctx->vf_netdev = NULL; | |
1386 | net_device_ctx->vf_inject = false; | |
1387 | ||
df2fff28 GKH |
1388 | net->netdev_ops = &device_ops; |
1389 | ||
a060679c | 1390 | net->hw_features = NETVSC_HW_FEATURES; |
1391 | net->features = NETVSC_HW_FEATURES | NETIF_F_HW_VLAN_CTAG_TX; | |
6048718d | 1392 | |
7ad24ea4 | 1393 | net->ethtool_ops = ðtool_ops; |
9efd21e1 | 1394 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 1395 | |
14a03cf8 VK |
1396 | /* We always need headroom for rndis header */ |
1397 | net->needed_headroom = RNDIS_AND_PPI_SIZE; | |
1398 | ||
692e084e | 1399 | /* Notify the netvsc driver of the new device */ |
8ebdcc52 | 1400 | memset(&device_info, 0, sizeof(device_info)); |
692e084e | 1401 | device_info.ring_size = ring_size; |
e01ec219 | 1402 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
692e084e HZ |
1403 | ret = rndis_filter_device_add(dev, &device_info); |
1404 | if (ret != 0) { | |
1405 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
7eafd9b4 | 1406 | netvsc_free_netdev(net); |
2ddd5e5f | 1407 | hv_set_drvdata(dev, NULL); |
692e084e | 1408 | return ret; |
df2fff28 | 1409 | } |
692e084e HZ |
1410 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
1411 | ||
3d541ac5 | 1412 | nvdev = net_device_ctx->nvdev; |
5b54dac8 HZ |
1413 | netif_set_real_num_tx_queues(net, nvdev->num_chn); |
1414 | netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
5b54dac8 | 1415 | |
a68f9614 HZ |
1416 | ret = register_netdev(net); |
1417 | if (ret != 0) { | |
1418 | pr_err("Unable to register netdev.\n"); | |
1419 | rndis_filter_device_remove(dev); | |
7eafd9b4 | 1420 | netvsc_free_netdev(net); |
a68f9614 HZ |
1421 | } |
1422 | ||
df2fff28 GKH |
1423 | return ret; |
1424 | } | |
1425 | ||
415b023a | 1426 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 1427 | { |
2ddd5e5f | 1428 | struct net_device *net; |
122a5f64 | 1429 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
1430 | struct netvsc_device *net_device; |
1431 | ||
3d541ac5 | 1432 | net = hv_get_drvdata(dev); |
df2fff28 | 1433 | |
df2fff28 | 1434 | if (net == NULL) { |
415b023a | 1435 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
1436 | return 0; |
1437 | } | |
1438 | ||
4d447c9a | 1439 | |
122a5f64 | 1440 | ndev_ctx = netdev_priv(net); |
3d541ac5 VK |
1441 | net_device = ndev_ctx->nvdev; |
1442 | ||
6da7225f VK |
1443 | /* Avoid racing with netvsc_change_mtu()/netvsc_set_channels() |
1444 | * removing the device. | |
1445 | */ | |
1446 | rtnl_lock(); | |
f580aec4 | 1447 | ndev_ctx->start_remove = true; |
6da7225f | 1448 | rtnl_unlock(); |
f580aec4 | 1449 | |
122a5f64 | 1450 | cancel_delayed_work_sync(&ndev_ctx->dwork); |
792df872 | 1451 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 1452 | |
df2fff28 | 1453 | /* Stop outbound asap */ |
0a282538 | 1454 | netif_tx_disable(net); |
df2fff28 GKH |
1455 | |
1456 | unregister_netdev(net); | |
1457 | ||
1458 | /* | |
1459 | * Call to the vsc driver to let it know that the device is being | |
1460 | * removed | |
1461 | */ | |
df06bcff | 1462 | rndis_filter_device_remove(dev); |
df2fff28 | 1463 | |
3d541ac5 VK |
1464 | hv_set_drvdata(dev, NULL); |
1465 | ||
7eafd9b4 | 1466 | netvsc_free_netdev(net); |
df06bcff | 1467 | return 0; |
df2fff28 GKH |
1468 | } |
1469 | ||
345c4cc3 | 1470 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 1471 | /* Network guid */ |
8f505944 | 1472 | { HV_NIC_GUID, }, |
c45cf2d4 | 1473 | { }, |
345c4cc3 S |
1474 | }; |
1475 | ||
1476 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
1477 | ||
f1542a66 | 1478 | /* The one and only one */ |
fde0ef9b | 1479 | static struct hv_driver netvsc_drv = { |
d31b20fc | 1480 | .name = KBUILD_MODNAME, |
345c4cc3 | 1481 | .id_table = id_table, |
fde0ef9b S |
1482 | .probe = netvsc_probe, |
1483 | .remove = netvsc_remove, | |
d4890970 | 1484 | }; |
f1542a66 | 1485 | |
84bf9cef KS |
1486 | |
1487 | /* | |
1488 | * On Hyper-V, every VF interface is matched with a corresponding | |
1489 | * synthetic interface. The synthetic interface is presented first | |
1490 | * to the guest. When the corresponding VF instance is registered, | |
1491 | * we will take care of switching the data path. | |
1492 | */ | |
1493 | static int netvsc_netdev_event(struct notifier_block *this, | |
1494 | unsigned long event, void *ptr) | |
1495 | { | |
1496 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); | |
1497 | ||
0dbff144 VK |
1498 | /* Avoid Vlan dev with same MAC registering as VF */ |
1499 | if (event_dev->priv_flags & IFF_802_1Q_VLAN) | |
1500 | return NOTIFY_DONE; | |
1501 | ||
1502 | /* Avoid Bonding master dev with same MAC registering as VF */ | |
1503 | if (event_dev->priv_flags & IFF_BONDING && | |
1504 | event_dev->flags & IFF_MASTER) | |
cb2911fe HZ |
1505 | return NOTIFY_DONE; |
1506 | ||
84bf9cef KS |
1507 | switch (event) { |
1508 | case NETDEV_REGISTER: | |
1509 | return netvsc_register_vf(event_dev); | |
1510 | case NETDEV_UNREGISTER: | |
1511 | return netvsc_unregister_vf(event_dev); | |
1512 | case NETDEV_UP: | |
1513 | return netvsc_vf_up(event_dev); | |
1514 | case NETDEV_DOWN: | |
1515 | return netvsc_vf_down(event_dev); | |
1516 | default: | |
1517 | return NOTIFY_DONE; | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | static struct notifier_block netvsc_netdev_notifier = { | |
1522 | .notifier_call = netvsc_netdev_event, | |
1523 | }; | |
1524 | ||
a9869c94 | 1525 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 1526 | { |
84bf9cef | 1527 | unregister_netdevice_notifier(&netvsc_netdev_notifier); |
768fa219 | 1528 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
1529 | } |
1530 | ||
1fde28cf | 1531 | static int __init netvsc_drv_init(void) |
df2fff28 | 1532 | { |
84bf9cef KS |
1533 | int ret; |
1534 | ||
fa85a6c2 HZ |
1535 | if (ring_size < RING_SIZE_MIN) { |
1536 | ring_size = RING_SIZE_MIN; | |
1537 | pr_info("Increased ring_size to %d (min allowed)\n", | |
1538 | ring_size); | |
1539 | } | |
84bf9cef KS |
1540 | ret = vmbus_driver_register(&netvsc_drv); |
1541 | ||
1542 | if (ret) | |
1543 | return ret; | |
1544 | ||
1545 | register_netdevice_notifier(&netvsc_netdev_notifier); | |
1546 | return 0; | |
df2fff28 GKH |
1547 | } |
1548 | ||
26c14cc1 | 1549 | MODULE_LICENSE("GPL"); |
7880fc54 | 1550 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 1551 | |
1fde28cf | 1552 | module_init(netvsc_drv_init); |
a9869c94 | 1553 | module_exit(netvsc_drv_exit); |