Commit | Line | Data |
---|---|---|
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 |
99c8da0f | 45 | static int ring_size = 128; |
450d7a4b SH |
46 | module_param(ring_size, int, S_IRUGO); |
47 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); | |
fceaf24a | 48 | |
3f300ff4 SX |
49 | static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | |
50 | NETIF_MSG_LINK | NETIF_MSG_IFUP | | |
51 | NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | | |
52 | NETIF_MSG_TX_ERR; | |
53 | ||
54 | static int debug = -1; | |
55 | module_param(debug, int, S_IRUGO); | |
56 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
57 | ||
d426b2e3 HZ |
58 | static void do_set_multicast(struct work_struct *w) |
59 | { | |
792df872 WM |
60 | struct net_device_context *ndevctx = |
61 | container_of(w, struct net_device_context, work); | |
d426b2e3 HZ |
62 | struct netvsc_device *nvdev; |
63 | struct rndis_device *rdev; | |
64 | ||
65 | nvdev = hv_get_drvdata(ndevctx->device_ctx); | |
792df872 WM |
66 | if (nvdev == NULL || nvdev->ndev == NULL) |
67 | return; | |
d426b2e3 HZ |
68 | |
69 | rdev = nvdev->extension; | |
70 | if (rdev == NULL) | |
792df872 | 71 | return; |
d426b2e3 | 72 | |
792df872 | 73 | if (nvdev->ndev->flags & IFF_PROMISC) |
d426b2e3 HZ |
74 | rndis_filter_set_packet_filter(rdev, |
75 | NDIS_PACKET_TYPE_PROMISCUOUS); | |
76 | else | |
77 | rndis_filter_set_packet_filter(rdev, | |
78 | NDIS_PACKET_TYPE_BROADCAST | | |
79 | NDIS_PACKET_TYPE_ALL_MULTICAST | | |
80 | NDIS_PACKET_TYPE_DIRECTED); | |
d426b2e3 HZ |
81 | } |
82 | ||
4e9bfefa | 83 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a | 84 | { |
792df872 | 85 | struct net_device_context *net_device_ctx = netdev_priv(net); |
d426b2e3 | 86 | |
792df872 | 87 | schedule_work(&net_device_ctx->work); |
fceaf24a HJ |
88 | } |
89 | ||
fceaf24a HJ |
90 | static int netvsc_open(struct net_device *net) |
91 | { | |
fceaf24a | 92 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 93 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
891de74d HZ |
94 | struct netvsc_device *nvdev; |
95 | struct rndis_device *rdev; | |
02fafbc6 | 96 | int ret = 0; |
fceaf24a | 97 | |
891de74d HZ |
98 | netif_carrier_off(net); |
99 | ||
d515d0ff HZ |
100 | /* Open up the device */ |
101 | ret = rndis_filter_open(device_obj); | |
102 | if (ret != 0) { | |
103 | netdev_err(net, "unable to open device (ret %d).\n", ret); | |
104 | return ret; | |
fceaf24a HJ |
105 | } |
106 | ||
5b54dac8 | 107 | netif_tx_start_all_queues(net); |
d515d0ff | 108 | |
891de74d HZ |
109 | nvdev = hv_get_drvdata(device_obj); |
110 | rdev = nvdev->extension; | |
111 | if (!rdev->link_state) | |
112 | netif_carrier_on(net); | |
113 | ||
fceaf24a HJ |
114 | return ret; |
115 | } | |
116 | ||
fceaf24a HJ |
117 | static int netvsc_close(struct net_device *net) |
118 | { | |
fceaf24a | 119 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 120 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
02fafbc6 | 121 | int ret; |
fceaf24a | 122 | |
0a282538 | 123 | netif_tx_disable(net); |
fceaf24a | 124 | |
792df872 WM |
125 | /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */ |
126 | cancel_work_sync(&net_device_ctx->work); | |
9c26aa0d | 127 | ret = rndis_filter_close(device_obj); |
fceaf24a | 128 | if (ret != 0) |
eb335bc4 | 129 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
fceaf24a | 130 | |
fceaf24a HJ |
131 | return ret; |
132 | } | |
133 | ||
8a00251a KS |
134 | static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size, |
135 | int pkt_type) | |
136 | { | |
137 | struct rndis_packet *rndis_pkt; | |
138 | struct rndis_per_packet_info *ppi; | |
139 | ||
140 | rndis_pkt = &msg->msg.pkt; | |
141 | rndis_pkt->data_offset += ppi_size; | |
142 | ||
143 | ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt + | |
144 | rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len); | |
145 | ||
146 | ppi->size = ppi_size; | |
147 | ppi->type = pkt_type; | |
148 | ppi->ppi_offset = sizeof(struct rndis_per_packet_info); | |
149 | ||
150 | rndis_pkt->per_pkt_info_len += ppi_size; | |
151 | ||
152 | return ppi; | |
153 | } | |
154 | ||
5b54dac8 HZ |
155 | union sub_key { |
156 | u64 k; | |
157 | struct { | |
158 | u8 pad[3]; | |
159 | u8 kb; | |
160 | u32 ka; | |
161 | }; | |
162 | }; | |
163 | ||
164 | /* Toeplitz hash function | |
165 | * data: network byte order | |
166 | * return: host byte order | |
167 | */ | |
f88e6714 | 168 | static u32 comp_hash(u8 *key, int klen, void *data, int dlen) |
5b54dac8 HZ |
169 | { |
170 | union sub_key subk; | |
171 | int k_next = 4; | |
172 | u8 dt; | |
173 | int i, j; | |
174 | u32 ret = 0; | |
175 | ||
176 | subk.k = 0; | |
177 | subk.ka = ntohl(*(u32 *)key); | |
178 | ||
179 | for (i = 0; i < dlen; i++) { | |
180 | subk.kb = key[k_next]; | |
181 | k_next = (k_next + 1) % klen; | |
f88e6714 | 182 | dt = ((u8 *)data)[i]; |
5b54dac8 HZ |
183 | for (j = 0; j < 8; j++) { |
184 | if (dt & 0x80) | |
185 | ret ^= subk.ka; | |
186 | dt <<= 1; | |
187 | subk.k <<= 1; | |
188 | } | |
189 | } | |
190 | ||
191 | return ret; | |
192 | } | |
193 | ||
194 | static bool netvsc_set_hash(u32 *hash, struct sk_buff *skb) | |
195 | { | |
f88e6714 | 196 | struct flow_keys flow; |
5b54dac8 | 197 | int data_len; |
5b54dac8 | 198 | |
4c87454a HZ |
199 | if (!skb_flow_dissect(skb, &flow) || |
200 | !(flow.n_proto == htons(ETH_P_IP) || | |
201 | flow.n_proto == htons(ETH_P_IPV6))) | |
5b54dac8 HZ |
202 | return false; |
203 | ||
f88e6714 HZ |
204 | if (flow.ip_proto == IPPROTO_TCP) |
205 | data_len = 12; | |
206 | else | |
207 | data_len = 8; | |
5b54dac8 | 208 | |
f88e6714 | 209 | *hash = comp_hash(netvsc_hash_key, HASH_KEYLEN, &flow, data_len); |
5b54dac8 | 210 | |
f88e6714 | 211 | return true; |
5b54dac8 HZ |
212 | } |
213 | ||
214 | static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, | |
215 | void *accel_priv, select_queue_fallback_t fallback) | |
216 | { | |
217 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
218 | struct hv_device *hdev = net_device_ctx->device_ctx; | |
219 | struct netvsc_device *nvsc_dev = hv_get_drvdata(hdev); | |
220 | u32 hash; | |
221 | u16 q_idx = 0; | |
222 | ||
223 | if (nvsc_dev == NULL || ndev->real_num_tx_queues <= 1) | |
224 | return 0; | |
225 | ||
307f0995 | 226 | if (netvsc_set_hash(&hash, skb)) { |
5b54dac8 HZ |
227 | q_idx = nvsc_dev->send_table[hash % VRSS_SEND_TAB_SIZE] % |
228 | ndev->real_num_tx_queues; | |
307f0995 HZ |
229 | skb_set_hash(skb, hash, PKT_HASH_TYPE_L3); |
230 | } | |
5b54dac8 HZ |
231 | |
232 | return q_idx; | |
233 | } | |
234 | ||
ee90b812 | 235 | void netvsc_xmit_completion(void *context) |
fceaf24a | 236 | { |
4193d4f4 | 237 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
02fafbc6 | 238 | struct sk_buff *skb = (struct sk_buff *) |
893f6627 | 239 | (unsigned long)packet->send_completion_tid; |
fceaf24a | 240 | |
b08cc791 KS |
241 | if (!packet->part_of_skb) |
242 | kfree(packet); | |
fceaf24a | 243 | |
cbacec76 | 244 | if (skb) |
b220f5f9 | 245 | dev_kfree_skb_any(skb); |
fceaf24a HJ |
246 | } |
247 | ||
54a7357f KS |
248 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
249 | struct hv_page_buffer *pb) | |
250 | { | |
251 | int j = 0; | |
252 | ||
253 | /* Deal with compund pages by ignoring unused part | |
254 | * of the page. | |
255 | */ | |
256 | page += (offset >> PAGE_SHIFT); | |
257 | offset &= ~PAGE_MASK; | |
258 | ||
259 | while (len > 0) { | |
260 | unsigned long bytes; | |
261 | ||
262 | bytes = PAGE_SIZE - offset; | |
263 | if (bytes > len) | |
264 | bytes = len; | |
265 | pb[j].pfn = page_to_pfn(page); | |
266 | pb[j].offset = offset; | |
267 | pb[j].len = bytes; | |
268 | ||
269 | offset += bytes; | |
270 | len -= bytes; | |
271 | ||
272 | if (offset == PAGE_SIZE && len) { | |
273 | page++; | |
274 | offset = 0; | |
275 | j++; | |
276 | } | |
277 | } | |
278 | ||
279 | return j + 1; | |
280 | } | |
281 | ||
8a00251a | 282 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
aa0a34be | 283 | struct hv_netvsc_packet *packet) |
54a7357f | 284 | { |
aa0a34be | 285 | struct hv_page_buffer *pb = packet->page_buf; |
54a7357f KS |
286 | u32 slots_used = 0; |
287 | char *data = skb->data; | |
288 | int frags = skb_shinfo(skb)->nr_frags; | |
289 | int i; | |
290 | ||
291 | /* The packet is laid out thus: | |
aa0a34be | 292 | * 1. hdr: RNDIS header and PPI |
54a7357f KS |
293 | * 2. skb linear data |
294 | * 3. skb fragment data | |
295 | */ | |
296 | if (hdr != NULL) | |
297 | slots_used += fill_pg_buf(virt_to_page(hdr), | |
298 | offset_in_page(hdr), | |
299 | len, &pb[slots_used]); | |
300 | ||
aa0a34be HZ |
301 | packet->rmsg_size = len; |
302 | packet->rmsg_pgcnt = slots_used; | |
303 | ||
54a7357f KS |
304 | slots_used += fill_pg_buf(virt_to_page(data), |
305 | offset_in_page(data), | |
306 | skb_headlen(skb), &pb[slots_used]); | |
307 | ||
308 | for (i = 0; i < frags; i++) { | |
309 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
310 | ||
311 | slots_used += fill_pg_buf(skb_frag_page(frag), | |
312 | frag->page_offset, | |
313 | skb_frag_size(frag), &pb[slots_used]); | |
314 | } | |
8a00251a | 315 | return slots_used; |
54a7357f KS |
316 | } |
317 | ||
318 | static int count_skb_frag_slots(struct sk_buff *skb) | |
319 | { | |
320 | int i, frags = skb_shinfo(skb)->nr_frags; | |
321 | int pages = 0; | |
322 | ||
323 | for (i = 0; i < frags; i++) { | |
324 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
325 | unsigned long size = skb_frag_size(frag); | |
326 | unsigned long offset = frag->page_offset; | |
327 | ||
328 | /* Skip unused frames from start of page */ | |
329 | offset &= ~PAGE_MASK; | |
330 | pages += PFN_UP(offset + size); | |
331 | } | |
332 | return pages; | |
333 | } | |
334 | ||
335 | static int netvsc_get_slots(struct sk_buff *skb) | |
336 | { | |
337 | char *data = skb->data; | |
338 | unsigned int offset = offset_in_page(data); | |
339 | unsigned int len = skb_headlen(skb); | |
340 | int slots; | |
341 | int frag_slots; | |
342 | ||
343 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); | |
344 | frag_slots = count_skb_frag_slots(skb); | |
345 | return slots + frag_slots; | |
346 | } | |
347 | ||
08cd04bf KS |
348 | static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off) |
349 | { | |
350 | u32 ret_val = TRANSPORT_INFO_NOT_IP; | |
351 | ||
352 | if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) && | |
353 | (eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) { | |
354 | goto not_ip; | |
355 | } | |
356 | ||
357 | *trans_off = skb_transport_offset(skb); | |
358 | ||
359 | if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) { | |
360 | struct iphdr *iphdr = ip_hdr(skb); | |
361 | ||
362 | if (iphdr->protocol == IPPROTO_TCP) | |
363 | ret_val = TRANSPORT_INFO_IPV4_TCP; | |
364 | else if (iphdr->protocol == IPPROTO_UDP) | |
365 | ret_val = TRANSPORT_INFO_IPV4_UDP; | |
366 | } else { | |
367 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) | |
368 | ret_val = TRANSPORT_INFO_IPV6_TCP; | |
369 | else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) | |
370 | ret_val = TRANSPORT_INFO_IPV6_UDP; | |
371 | } | |
372 | ||
373 | not_ip: | |
374 | return ret_val; | |
375 | } | |
376 | ||
02fafbc6 | 377 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 378 | { |
fceaf24a | 379 | struct net_device_context *net_device_ctx = netdev_priv(net); |
981a1bd8 | 380 | struct hv_netvsc_packet *packet = NULL; |
02fafbc6 | 381 | int ret; |
8a00251a KS |
382 | unsigned int num_data_pgs; |
383 | struct rndis_message *rndis_msg; | |
384 | struct rndis_packet *rndis_pkt; | |
385 | u32 rndis_msg_size; | |
386 | bool isvlan; | |
e88f7e07 | 387 | bool linear = false; |
8a00251a | 388 | struct rndis_per_packet_info *ppi; |
08cd04bf | 389 | struct ndis_tcp_ip_checksum_info *csum_info; |
77bf5487 | 390 | struct ndis_tcp_lso_info *lso_info; |
08cd04bf KS |
391 | int hdr_offset; |
392 | u32 net_trans_info; | |
307f0995 | 393 | u32 hash; |
e88f7e07 VK |
394 | u32 skb_length; |
395 | u32 head_room; | |
b08cc791 KS |
396 | u32 pkt_sz; |
397 | struct hv_page_buffer page_buf[MAX_PAGE_BUFFER_COUNT]; | |
08cd04bf | 398 | |
fceaf24a | 399 | |
54a7357f KS |
400 | /* We will atmost need two pages to describe the rndis |
401 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number | |
e88f7e07 VK |
402 | * of pages in a single packet. If skb is scattered around |
403 | * more pages we try linearizing it. | |
54a7357f | 404 | */ |
e88f7e07 VK |
405 | |
406 | check_size: | |
407 | skb_length = skb->len; | |
408 | head_room = skb_headroom(skb); | |
8a00251a | 409 | num_data_pgs = netvsc_get_slots(skb) + 2; |
e88f7e07 VK |
410 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT && linear) { |
411 | net_alert_ratelimited("packet too big: %u pages (%u bytes)\n", | |
412 | num_data_pgs, skb->len); | |
981a1bd8 VK |
413 | ret = -EFAULT; |
414 | goto drop; | |
e88f7e07 VK |
415 | } else if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { |
416 | if (skb_linearize(skb)) { | |
417 | net_alert_ratelimited("failed to linearize skb\n"); | |
418 | ret = -ENOMEM; | |
419 | goto drop; | |
420 | } | |
421 | linear = true; | |
422 | goto check_size; | |
54a7357f | 423 | } |
fceaf24a | 424 | |
72151422 | 425 | pkt_sz = sizeof(struct hv_netvsc_packet) + RNDIS_AND_PPI_SIZE; |
b08cc791 KS |
426 | |
427 | if (head_room < pkt_sz) { | |
428 | packet = kmalloc(pkt_sz, GFP_ATOMIC); | |
429 | if (!packet) { | |
430 | /* out of memory, drop packet */ | |
431 | netdev_err(net, "unable to alloc hv_netvsc_packet\n"); | |
981a1bd8 VK |
432 | ret = -ENOMEM; |
433 | goto drop; | |
b08cc791 KS |
434 | } |
435 | packet->part_of_skb = false; | |
436 | } else { | |
437 | /* Use the headroom for building up the packet */ | |
438 | packet = (struct hv_netvsc_packet *)skb->head; | |
439 | packet->part_of_skb = true; | |
fceaf24a HJ |
440 | } |
441 | ||
b08cc791 | 442 | packet->status = 0; |
7c3877f2 HZ |
443 | packet->xmit_more = skb->xmit_more; |
444 | ||
1f5f3a75 | 445 | packet->vlan_tci = skb->vlan_tci; |
b08cc791 | 446 | packet->page_buf = page_buf; |
1f5f3a75 | 447 | |
5b54dac8 HZ |
448 | packet->q_idx = skb_get_queue_mapping(skb); |
449 | ||
8a00251a | 450 | packet->is_data_pkt = true; |
4d447c9a | 451 | packet->total_data_buflen = skb->len; |
fceaf24a | 452 | |
8a00251a | 453 | packet->rndis_msg = (struct rndis_message *)((unsigned long)packet + |
b08cc791 KS |
454 | sizeof(struct hv_netvsc_packet)); |
455 | ||
72151422 | 456 | memset(packet->rndis_msg, 0, RNDIS_AND_PPI_SIZE); |
fceaf24a | 457 | |
454f18a9 | 458 | /* Set the completion routine */ |
893f6627 HZ |
459 | packet->send_completion = netvsc_xmit_completion; |
460 | packet->send_completion_ctx = packet; | |
461 | packet->send_completion_tid = (unsigned long)skb; | |
fceaf24a | 462 | |
8a00251a KS |
463 | isvlan = packet->vlan_tci & VLAN_TAG_PRESENT; |
464 | ||
465 | /* Add the rndis header */ | |
466 | rndis_msg = packet->rndis_msg; | |
467 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; | |
468 | rndis_msg->msg_len = packet->total_data_buflen; | |
469 | rndis_pkt = &rndis_msg->msg.pkt; | |
470 | rndis_pkt->data_offset = sizeof(struct rndis_packet); | |
471 | rndis_pkt->data_len = packet->total_data_buflen; | |
472 | rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); | |
473 | ||
474 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); | |
475 | ||
307f0995 HZ |
476 | hash = skb_get_hash_raw(skb); |
477 | if (hash != 0 && net->real_num_tx_queues > 1) { | |
478 | rndis_msg_size += NDIS_HASH_PPI_SIZE; | |
479 | ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE, | |
480 | NBL_HASH_VALUE); | |
481 | *(u32 *)((void *)ppi + ppi->ppi_offset) = hash; | |
482 | } | |
483 | ||
8a00251a KS |
484 | if (isvlan) { |
485 | struct ndis_pkt_8021q_info *vlan; | |
486 | ||
487 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; | |
488 | ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, | |
489 | IEEE_8021Q_INFO); | |
490 | vlan = (struct ndis_pkt_8021q_info *)((void *)ppi + | |
491 | ppi->ppi_offset); | |
492 | vlan->vlanid = packet->vlan_tci & VLAN_VID_MASK; | |
493 | vlan->pri = (packet->vlan_tci & VLAN_PRIO_MASK) >> | |
494 | VLAN_PRIO_SHIFT; | |
495 | } | |
496 | ||
08cd04bf KS |
497 | net_trans_info = get_net_transport_info(skb, &hdr_offset); |
498 | if (net_trans_info == TRANSPORT_INFO_NOT_IP) | |
499 | goto do_send; | |
500 | ||
501 | /* | |
502 | * Setup the sendside checksum offload only if this is not a | |
503 | * GSO packet. | |
504 | */ | |
505 | if (skb_is_gso(skb)) | |
77bf5487 | 506 | goto do_lso; |
08cd04bf | 507 | |
22041fb0 KS |
508 | if ((skb->ip_summed == CHECKSUM_NONE) || |
509 | (skb->ip_summed == CHECKSUM_UNNECESSARY)) | |
510 | goto do_send; | |
511 | ||
08cd04bf KS |
512 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; |
513 | ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, | |
514 | TCPIP_CHKSUM_PKTINFO); | |
515 | ||
516 | csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + | |
517 | ppi->ppi_offset); | |
518 | ||
519 | if (net_trans_info & (INFO_IPV4 << 16)) | |
520 | csum_info->transmit.is_ipv4 = 1; | |
521 | else | |
522 | csum_info->transmit.is_ipv6 = 1; | |
523 | ||
524 | if (net_trans_info & INFO_TCP) { | |
525 | csum_info->transmit.tcp_checksum = 1; | |
526 | csum_info->transmit.tcp_header_offset = hdr_offset; | |
527 | } else if (net_trans_info & INFO_UDP) { | |
af9893a3 KS |
528 | /* UDP checksum offload is not supported on ws2008r2. |
529 | * Furthermore, on ws2012 and ws2012r2, there are some | |
530 | * issues with udp checksum offload from Linux guests. | |
531 | * (these are host issues). | |
532 | * For now compute the checksum here. | |
533 | */ | |
534 | struct udphdr *uh; | |
535 | u16 udp_len; | |
536 | ||
537 | ret = skb_cow_head(skb, 0); | |
538 | if (ret) | |
539 | goto drop; | |
540 | ||
541 | uh = udp_hdr(skb); | |
542 | udp_len = ntohs(uh->len); | |
543 | uh->check = 0; | |
544 | uh->check = csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
545 | ip_hdr(skb)->daddr, | |
546 | udp_len, IPPROTO_UDP, | |
547 | csum_partial(uh, udp_len, 0)); | |
548 | if (uh->check == 0) | |
549 | uh->check = CSUM_MANGLED_0; | |
550 | ||
551 | csum_info->transmit.udp_checksum = 0; | |
08cd04bf | 552 | } |
77bf5487 KS |
553 | goto do_send; |
554 | ||
555 | do_lso: | |
556 | rndis_msg_size += NDIS_LSO_PPI_SIZE; | |
557 | ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, | |
558 | TCP_LARGESEND_PKTINFO); | |
559 | ||
560 | lso_info = (struct ndis_tcp_lso_info *)((void *)ppi + | |
561 | ppi->ppi_offset); | |
562 | ||
563 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; | |
564 | if (net_trans_info & (INFO_IPV4 << 16)) { | |
565 | lso_info->lso_v2_transmit.ip_version = | |
566 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; | |
567 | ip_hdr(skb)->tot_len = 0; | |
568 | ip_hdr(skb)->check = 0; | |
569 | tcp_hdr(skb)->check = | |
570 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
571 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
572 | } else { | |
573 | lso_info->lso_v2_transmit.ip_version = | |
574 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; | |
575 | ipv6_hdr(skb)->payload_len = 0; | |
576 | tcp_hdr(skb)->check = | |
577 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
578 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
579 | } | |
580 | lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset; | |
581 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; | |
08cd04bf KS |
582 | |
583 | do_send: | |
8a00251a KS |
584 | /* Start filling in the page buffers with the rndis hdr */ |
585 | rndis_msg->msg_len += rndis_msg_size; | |
942396b0 | 586 | packet->total_data_buflen = rndis_msg->msg_len; |
8a00251a | 587 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, |
aa0a34be | 588 | skb, packet); |
8a00251a KS |
589 | |
590 | ret = netvsc_send(net_device_ctx->device_ctx, packet); | |
591 | ||
af9893a3 | 592 | drop: |
02fafbc6 | 593 | if (ret == 0) { |
dedb845d | 594 | net->stats.tx_bytes += skb_length; |
b852fdce | 595 | net->stats.tx_packets++; |
b220f5f9 | 596 | } else { |
981a1bd8 | 597 | if (packet && !packet->part_of_skb) |
b08cc791 | 598 | kfree(packet); |
33be96e4 HZ |
599 | if (ret != -EAGAIN) { |
600 | dev_kfree_skb_any(skb); | |
601 | net->stats.tx_dropped++; | |
602 | } | |
fceaf24a HJ |
603 | } |
604 | ||
33be96e4 | 605 | return (ret == -EAGAIN) ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
fceaf24a HJ |
606 | } |
607 | ||
3e189519 | 608 | /* |
02fafbc6 GKH |
609 | * netvsc_linkstatus_callback - Link up/down notification |
610 | */ | |
90ef117a | 611 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
3a494e71 | 612 | struct rndis_message *resp) |
fceaf24a | 613 | { |
3a494e71 | 614 | struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
2ddd5e5f | 615 | struct net_device *net; |
c996edcf | 616 | struct net_device_context *ndev_ctx; |
2ddd5e5f | 617 | struct netvsc_device *net_device; |
891de74d | 618 | struct rndis_device *rdev; |
2ddd5e5f S |
619 | |
620 | net_device = hv_get_drvdata(device_obj); | |
891de74d HZ |
621 | rdev = net_device->extension; |
622 | ||
3a494e71 HZ |
623 | switch (indicate->status) { |
624 | case RNDIS_STATUS_MEDIA_CONNECT: | |
625 | rdev->link_state = false; | |
626 | break; | |
627 | case RNDIS_STATUS_MEDIA_DISCONNECT: | |
628 | rdev->link_state = true; | |
629 | break; | |
630 | case RNDIS_STATUS_NETWORK_CHANGE: | |
631 | rdev->link_change = true; | |
632 | break; | |
633 | default: | |
634 | return; | |
635 | } | |
891de74d | 636 | |
2ddd5e5f | 637 | net = net_device->ndev; |
fceaf24a | 638 | |
891de74d | 639 | if (!net || net->reg_state != NETREG_REGISTERED) |
fceaf24a | 640 | return; |
fceaf24a | 641 | |
891de74d | 642 | ndev_ctx = netdev_priv(net); |
3a494e71 | 643 | if (!rdev->link_state) { |
c4b6a2ea | 644 | schedule_delayed_work(&ndev_ctx->dwork, 0); |
122a5f64 | 645 | schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20)); |
02fafbc6 | 646 | } else { |
891de74d | 647 | schedule_delayed_work(&ndev_ctx->dwork, 0); |
fceaf24a | 648 | } |
fceaf24a HJ |
649 | } |
650 | ||
3e189519 HJ |
651 | /* |
652 | * netvsc_recv_callback - Callback when we receive a packet from the | |
653 | * "wire" on the specified device. | |
02fafbc6 | 654 | */ |
f79adf8f | 655 | int netvsc_recv_callback(struct hv_device *device_obj, |
e3d605ed KS |
656 | struct hv_netvsc_packet *packet, |
657 | struct ndis_tcp_ip_checksum_info *csum_info) | |
fceaf24a | 658 | { |
6f4c4446 | 659 | struct net_device *net; |
fceaf24a | 660 | struct sk_buff *skb; |
fceaf24a | 661 | |
6f4c4446 | 662 | net = ((struct netvsc_device *)hv_get_drvdata(device_obj))->ndev; |
a68f9614 | 663 | if (!net || net->reg_state != NETREG_REGISTERED) { |
63f6921d | 664 | packet->status = NVSP_STAT_FAIL; |
fceaf24a HJ |
665 | return 0; |
666 | } | |
667 | ||
9495c282 | 668 | /* Allocate a skb - TODO direct I/O to pages? */ |
72a2f5bd | 669 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
9495c282 SH |
670 | if (unlikely(!skb)) { |
671 | ++net->stats.rx_dropped; | |
63f6921d | 672 | packet->status = NVSP_STAT_FAIL; |
9495c282 SH |
673 | return 0; |
674 | } | |
fceaf24a | 675 | |
02fafbc6 GKH |
676 | /* |
677 | * Copy to skb. This copy is needed here since the memory pointed by | |
678 | * hv_netvsc_packet cannot be deallocated | |
679 | */ | |
45326342 HZ |
680 | memcpy(skb_put(skb, packet->total_data_buflen), packet->data, |
681 | packet->total_data_buflen); | |
fceaf24a HJ |
682 | |
683 | skb->protocol = eth_type_trans(skb, net); | |
e3d605ed KS |
684 | if (csum_info) { |
685 | /* We only look at the IP checksum here. | |
686 | * Should we be dropping the packet if checksum | |
687 | * failed? How do we deal with other checksums - TCP/UDP? | |
688 | */ | |
689 | if (csum_info->receive.ip_checksum_succeeded) | |
690 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
691 | else | |
692 | skb->ip_summed = CHECKSUM_NONE; | |
693 | } | |
694 | ||
93725cbd HZ |
695 | if (packet->vlan_tci & VLAN_TAG_PRESENT) |
696 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
697 | packet->vlan_tci); | |
fceaf24a | 698 | |
4baab261 | 699 | skb_record_rx_queue(skb, packet->channel-> |
e565e803 | 700 | offermsg.offer.sub_channel_index); |
5b54dac8 | 701 | |
9495c282 | 702 | net->stats.rx_packets++; |
48c38839 | 703 | net->stats.rx_bytes += packet->total_data_buflen; |
9495c282 | 704 | |
02fafbc6 GKH |
705 | /* |
706 | * Pass the skb back up. Network stack will deallocate the skb when it | |
9495c282 SH |
707 | * is done. |
708 | * TODO - use NAPI? | |
02fafbc6 | 709 | */ |
9495c282 | 710 | netif_rx(skb); |
fceaf24a | 711 | |
fceaf24a HJ |
712 | return 0; |
713 | } | |
714 | ||
f82f4ad7 SH |
715 | static void netvsc_get_drvinfo(struct net_device *net, |
716 | struct ethtool_drvinfo *info) | |
717 | { | |
7826d43f | 718 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 719 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
f82f4ad7 SH |
720 | } |
721 | ||
59995370 AS |
722 | static void netvsc_get_channels(struct net_device *net, |
723 | struct ethtool_channels *channel) | |
724 | { | |
725 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
726 | struct hv_device *dev = net_device_ctx->device_ctx; | |
727 | struct netvsc_device *nvdev = hv_get_drvdata(dev); | |
728 | ||
729 | if (nvdev) { | |
730 | channel->max_combined = nvdev->max_chn; | |
731 | channel->combined_count = nvdev->num_chn; | |
732 | } | |
733 | } | |
734 | ||
4d447c9a HZ |
735 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
736 | { | |
737 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
738 | struct hv_device *hdev = ndevctx->device_ctx; | |
739 | struct netvsc_device *nvdev = hv_get_drvdata(hdev); | |
740 | struct netvsc_device_info device_info; | |
741 | int limit = ETH_DATA_LEN; | |
742 | ||
743 | if (nvdev == NULL || nvdev->destroy) | |
744 | return -ENODEV; | |
745 | ||
a1eabb01 | 746 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) |
4d3c9d37 | 747 | limit = NETVSC_MTU - ETH_HLEN; |
4d447c9a | 748 | |
4d3c9d37 HZ |
749 | /* Hyper-V hosts don't support MTU < ETH_DATA_LEN (1500) */ |
750 | if (mtu < ETH_DATA_LEN || mtu > limit) | |
4d447c9a HZ |
751 | return -EINVAL; |
752 | ||
753 | nvdev->start_remove = true; | |
792df872 | 754 | cancel_work_sync(&ndevctx->work); |
0a282538 | 755 | netif_tx_disable(ndev); |
4d447c9a HZ |
756 | rndis_filter_device_remove(hdev); |
757 | ||
758 | ndev->mtu = mtu; | |
759 | ||
760 | ndevctx->device_ctx = hdev; | |
761 | hv_set_drvdata(hdev, ndev); | |
762 | device_info.ring_size = ring_size; | |
763 | rndis_filter_device_add(hdev, &device_info); | |
5b54dac8 | 764 | netif_tx_wake_all_queues(ndev); |
4d447c9a HZ |
765 | |
766 | return 0; | |
767 | } | |
768 | ||
1ce09e89 HZ |
769 | |
770 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
771 | { | |
772 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
773 | struct hv_device *hdev = ndevctx->device_ctx; | |
774 | struct sockaddr *addr = p; | |
9a4c831e | 775 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
776 | unsigned char save_aatype; |
777 | int err; | |
778 | ||
779 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
780 | save_aatype = ndev->addr_assign_type; | |
781 | ||
782 | err = eth_mac_addr(ndev, p); | |
783 | if (err != 0) | |
784 | return err; | |
785 | ||
786 | err = rndis_filter_set_device_mac(hdev, addr->sa_data); | |
787 | if (err != 0) { | |
788 | /* roll back to saved MAC */ | |
789 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
790 | ndev->addr_assign_type = save_aatype; | |
791 | } | |
792 | ||
793 | return err; | |
794 | } | |
795 | ||
316158fe RW |
796 | #ifdef CONFIG_NET_POLL_CONTROLLER |
797 | static void netvsc_poll_controller(struct net_device *net) | |
798 | { | |
799 | /* As netvsc_start_xmit() works synchronous we don't have to | |
800 | * trigger anything here. | |
801 | */ | |
802 | } | |
803 | #endif | |
1ce09e89 | 804 | |
f82f4ad7 SH |
805 | static const struct ethtool_ops ethtool_ops = { |
806 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 | 807 | .get_link = ethtool_op_get_link, |
59995370 | 808 | .get_channels = netvsc_get_channels, |
f82f4ad7 SH |
809 | }; |
810 | ||
df2fff28 GKH |
811 | static const struct net_device_ops device_ops = { |
812 | .ndo_open = netvsc_open, | |
813 | .ndo_stop = netvsc_close, | |
814 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 815 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 816 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 817 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 818 | .ndo_set_mac_address = netvsc_set_mac_addr, |
5b54dac8 | 819 | .ndo_select_queue = netvsc_select_queue, |
316158fe RW |
820 | #ifdef CONFIG_NET_POLL_CONTROLLER |
821 | .ndo_poll_controller = netvsc_poll_controller, | |
822 | #endif | |
df2fff28 GKH |
823 | }; |
824 | ||
c996edcf HZ |
825 | /* |
826 | * Send GARP packet to network peers after migrations. | |
827 | * After Quick Migration, the network is not immediately operational in the | |
828 | * current context when receiving RNDIS_STATUS_MEDIA_CONNECT event. So, add | |
122a5f64 | 829 | * another netif_notify_peers() into a delayed work, otherwise GARP packet |
c996edcf | 830 | * will not be sent after quick migration, and cause network disconnection. |
891de74d | 831 | * Also, we update the carrier status here. |
c996edcf | 832 | */ |
891de74d | 833 | static void netvsc_link_change(struct work_struct *w) |
c996edcf HZ |
834 | { |
835 | struct net_device_context *ndev_ctx; | |
836 | struct net_device *net; | |
2ddd5e5f | 837 | struct netvsc_device *net_device; |
891de74d | 838 | struct rndis_device *rdev; |
3a494e71 HZ |
839 | bool notify, refresh = false; |
840 | char *argv[] = { "/etc/init.d/network", "restart", NULL }; | |
841 | char *envp[] = { "HOME=/", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL }; | |
891de74d HZ |
842 | |
843 | rtnl_lock(); | |
c996edcf | 844 | |
122a5f64 | 845 | ndev_ctx = container_of(w, struct net_device_context, dwork.work); |
2ddd5e5f | 846 | net_device = hv_get_drvdata(ndev_ctx->device_ctx); |
891de74d | 847 | rdev = net_device->extension; |
2ddd5e5f | 848 | net = net_device->ndev; |
891de74d HZ |
849 | |
850 | if (rdev->link_state) { | |
851 | netif_carrier_off(net); | |
852 | notify = false; | |
853 | } else { | |
854 | netif_carrier_on(net); | |
855 | notify = true; | |
3a494e71 HZ |
856 | if (rdev->link_change) { |
857 | rdev->link_change = false; | |
858 | refresh = true; | |
859 | } | |
891de74d HZ |
860 | } |
861 | ||
862 | rtnl_unlock(); | |
863 | ||
3a494e71 HZ |
864 | if (refresh) |
865 | call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC); | |
866 | ||
891de74d HZ |
867 | if (notify) |
868 | netdev_notify_peers(net); | |
c996edcf HZ |
869 | } |
870 | ||
871 | ||
84946899 S |
872 | static int netvsc_probe(struct hv_device *dev, |
873 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 874 | { |
df2fff28 GKH |
875 | struct net_device *net = NULL; |
876 | struct net_device_context *net_device_ctx; | |
877 | struct netvsc_device_info device_info; | |
5b54dac8 | 878 | struct netvsc_device *nvdev; |
df2fff28 | 879 | int ret; |
b08cc791 | 880 | u32 max_needed_headroom; |
df2fff28 | 881 | |
5b54dac8 HZ |
882 | net = alloc_etherdev_mq(sizeof(struct net_device_context), |
883 | num_online_cpus()); | |
df2fff28 | 884 | if (!net) |
51a805d0 | 885 | return -ENOMEM; |
df2fff28 | 886 | |
b08cc791 | 887 | max_needed_headroom = sizeof(struct hv_netvsc_packet) + |
72151422 | 888 | RNDIS_AND_PPI_SIZE; |
b08cc791 | 889 | |
1b07da51 HZ |
890 | netif_carrier_off(net); |
891 | ||
df2fff28 | 892 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 893 | net_device_ctx->device_ctx = dev; |
3f300ff4 SX |
894 | net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); |
895 | if (netif_msg_probe(net_device_ctx)) | |
896 | netdev_dbg(net, "netvsc msg_enable: %d\n", | |
897 | net_device_ctx->msg_enable); | |
898 | ||
2ddd5e5f | 899 | hv_set_drvdata(dev, net); |
891de74d | 900 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
792df872 | 901 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
df2fff28 | 902 | |
df2fff28 GKH |
903 | net->netdev_ops = &device_ops; |
904 | ||
77bf5487 KS |
905 | net->hw_features = NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_IP_CSUM | |
906 | NETIF_F_TSO; | |
08cd04bf | 907 | net->features = NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_SG | NETIF_F_RXCSUM | |
77bf5487 | 908 | NETIF_F_IP_CSUM | NETIF_F_TSO; |
6048718d | 909 | |
7ad24ea4 | 910 | net->ethtool_ops = ðtool_ops; |
9efd21e1 | 911 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 912 | |
b08cc791 KS |
913 | /* |
914 | * Request additional head room in the skb. | |
915 | * We will use this space to build the rndis | |
916 | * heaser and other state we need to maintain. | |
917 | */ | |
918 | net->needed_headroom = max_needed_headroom; | |
919 | ||
692e084e HZ |
920 | /* Notify the netvsc driver of the new device */ |
921 | device_info.ring_size = ring_size; | |
922 | ret = rndis_filter_device_add(dev, &device_info); | |
923 | if (ret != 0) { | |
924 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
df2fff28 | 925 | free_netdev(net); |
2ddd5e5f | 926 | hv_set_drvdata(dev, NULL); |
692e084e | 927 | return ret; |
df2fff28 | 928 | } |
692e084e HZ |
929 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
930 | ||
5b54dac8 HZ |
931 | nvdev = hv_get_drvdata(dev); |
932 | netif_set_real_num_tx_queues(net, nvdev->num_chn); | |
933 | netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
5b54dac8 | 934 | |
a68f9614 HZ |
935 | ret = register_netdev(net); |
936 | if (ret != 0) { | |
937 | pr_err("Unable to register netdev.\n"); | |
938 | rndis_filter_device_remove(dev); | |
939 | free_netdev(net); | |
1b07da51 HZ |
940 | } else { |
941 | schedule_delayed_work(&net_device_ctx->dwork, 0); | |
a68f9614 HZ |
942 | } |
943 | ||
df2fff28 GKH |
944 | return ret; |
945 | } | |
946 | ||
415b023a | 947 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 948 | { |
2ddd5e5f | 949 | struct net_device *net; |
122a5f64 | 950 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
951 | struct netvsc_device *net_device; |
952 | ||
953 | net_device = hv_get_drvdata(dev); | |
954 | net = net_device->ndev; | |
df2fff28 | 955 | |
df2fff28 | 956 | if (net == NULL) { |
415b023a | 957 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
958 | return 0; |
959 | } | |
960 | ||
4d447c9a HZ |
961 | net_device->start_remove = true; |
962 | ||
122a5f64 HZ |
963 | ndev_ctx = netdev_priv(net); |
964 | cancel_delayed_work_sync(&ndev_ctx->dwork); | |
792df872 | 965 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 966 | |
df2fff28 | 967 | /* Stop outbound asap */ |
0a282538 | 968 | netif_tx_disable(net); |
df2fff28 GKH |
969 | |
970 | unregister_netdev(net); | |
971 | ||
972 | /* | |
973 | * Call to the vsc driver to let it know that the device is being | |
974 | * removed | |
975 | */ | |
df06bcff | 976 | rndis_filter_device_remove(dev); |
df2fff28 GKH |
977 | |
978 | free_netdev(net); | |
df06bcff | 979 | return 0; |
df2fff28 GKH |
980 | } |
981 | ||
345c4cc3 | 982 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 983 | /* Network guid */ |
8f505944 | 984 | { HV_NIC_GUID, }, |
c45cf2d4 | 985 | { }, |
345c4cc3 S |
986 | }; |
987 | ||
988 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
989 | ||
f1542a66 | 990 | /* The one and only one */ |
fde0ef9b | 991 | static struct hv_driver netvsc_drv = { |
d31b20fc | 992 | .name = KBUILD_MODNAME, |
345c4cc3 | 993 | .id_table = id_table, |
fde0ef9b S |
994 | .probe = netvsc_probe, |
995 | .remove = netvsc_remove, | |
d4890970 | 996 | }; |
f1542a66 | 997 | |
a9869c94 | 998 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 999 | { |
768fa219 | 1000 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
1001 | } |
1002 | ||
1fde28cf | 1003 | static int __init netvsc_drv_init(void) |
df2fff28 | 1004 | { |
fa85a6c2 HZ |
1005 | if (ring_size < RING_SIZE_MIN) { |
1006 | ring_size = RING_SIZE_MIN; | |
1007 | pr_info("Increased ring_size to %d (min allowed)\n", | |
1008 | ring_size); | |
1009 | } | |
768fa219 | 1010 | return vmbus_driver_register(&netvsc_drv); |
df2fff28 GKH |
1011 | } |
1012 | ||
26c14cc1 | 1013 | MODULE_LICENSE("GPL"); |
7880fc54 | 1014 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 1015 | |
1fde28cf | 1016 | module_init(netvsc_drv_init); |
a9869c94 | 1017 | module_exit(netvsc_drv_exit); |