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 |
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 | { | |
fceaf24a | 101 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 102 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
3d541ac5 | 103 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
891de74d | 104 | struct rndis_device *rdev; |
02fafbc6 | 105 | int ret = 0; |
fceaf24a | 106 | |
891de74d HZ |
107 | netif_carrier_off(net); |
108 | ||
d515d0ff HZ |
109 | /* Open up the device */ |
110 | ret = rndis_filter_open(device_obj); | |
111 | if (ret != 0) { | |
112 | netdev_err(net, "unable to open device (ret %d).\n", ret); | |
113 | return ret; | |
fceaf24a HJ |
114 | } |
115 | ||
2de8530b | 116 | netif_tx_wake_all_queues(net); |
d515d0ff | 117 | |
891de74d HZ |
118 | rdev = nvdev->extension; |
119 | if (!rdev->link_state) | |
120 | netif_carrier_on(net); | |
121 | ||
fceaf24a HJ |
122 | return ret; |
123 | } | |
124 | ||
fceaf24a HJ |
125 | static int netvsc_close(struct net_device *net) |
126 | { | |
fceaf24a | 127 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 128 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
3d541ac5 | 129 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
02fafbc6 | 130 | int ret; |
2de8530b HZ |
131 | u32 aread, awrite, i, msec = 10, retry = 0, retry_max = 20; |
132 | struct vmbus_channel *chn; | |
fceaf24a | 133 | |
0a282538 | 134 | netif_tx_disable(net); |
fceaf24a | 135 | |
792df872 WM |
136 | /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */ |
137 | cancel_work_sync(&net_device_ctx->work); | |
9c26aa0d | 138 | ret = rndis_filter_close(device_obj); |
2de8530b | 139 | if (ret != 0) { |
eb335bc4 | 140 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
2de8530b HZ |
141 | return ret; |
142 | } | |
143 | ||
144 | /* Ensure pending bytes in ring are read */ | |
145 | while (true) { | |
146 | aread = 0; | |
147 | for (i = 0; i < nvdev->num_chn; i++) { | |
148 | chn = nvdev->chn_table[i]; | |
149 | if (!chn) | |
150 | continue; | |
151 | ||
152 | hv_get_ringbuffer_availbytes(&chn->inbound, &aread, | |
153 | &awrite); | |
154 | ||
155 | if (aread) | |
156 | break; | |
157 | ||
158 | hv_get_ringbuffer_availbytes(&chn->outbound, &aread, | |
159 | &awrite); | |
160 | ||
161 | if (aread) | |
162 | break; | |
163 | } | |
164 | ||
165 | retry++; | |
166 | if (retry > retry_max || aread == 0) | |
167 | break; | |
168 | ||
169 | msleep(msec); | |
170 | ||
171 | if (msec < 1000) | |
172 | msec *= 2; | |
173 | } | |
174 | ||
175 | if (aread) { | |
176 | netdev_err(net, "Ring buffer not empty after closing rndis\n"); | |
177 | ret = -ETIMEDOUT; | |
178 | } | |
fceaf24a | 179 | |
fceaf24a HJ |
180 | return ret; |
181 | } | |
182 | ||
8a00251a KS |
183 | static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size, |
184 | int pkt_type) | |
185 | { | |
186 | struct rndis_packet *rndis_pkt; | |
187 | struct rndis_per_packet_info *ppi; | |
188 | ||
189 | rndis_pkt = &msg->msg.pkt; | |
190 | rndis_pkt->data_offset += ppi_size; | |
191 | ||
192 | ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt + | |
193 | rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len); | |
194 | ||
195 | ppi->size = ppi_size; | |
196 | ppi->type = pkt_type; | |
197 | ppi->ppi_offset = sizeof(struct rndis_per_packet_info); | |
198 | ||
199 | rndis_pkt->per_pkt_info_len += ppi_size; | |
200 | ||
201 | return ppi; | |
202 | } | |
203 | ||
5b54dac8 HZ |
204 | static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, |
205 | void *accel_priv, select_queue_fallback_t fallback) | |
206 | { | |
207 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
3d541ac5 | 208 | struct netvsc_device *nvsc_dev = net_device_ctx->nvdev; |
5b54dac8 HZ |
209 | u32 hash; |
210 | u16 q_idx = 0; | |
211 | ||
212 | if (nvsc_dev == NULL || ndev->real_num_tx_queues <= 1) | |
213 | return 0; | |
214 | ||
757647e1 VK |
215 | hash = skb_get_hash(skb); |
216 | q_idx = nvsc_dev->send_table[hash % VRSS_SEND_TAB_SIZE] % | |
217 | ndev->real_num_tx_queues; | |
5b54dac8 | 218 | |
8b9fbe1a VK |
219 | if (!nvsc_dev->chn_table[q_idx]) |
220 | q_idx = 0; | |
221 | ||
5b54dac8 HZ |
222 | return q_idx; |
223 | } | |
224 | ||
54a7357f KS |
225 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
226 | struct hv_page_buffer *pb) | |
227 | { | |
228 | int j = 0; | |
229 | ||
230 | /* Deal with compund pages by ignoring unused part | |
231 | * of the page. | |
232 | */ | |
233 | page += (offset >> PAGE_SHIFT); | |
234 | offset &= ~PAGE_MASK; | |
235 | ||
236 | while (len > 0) { | |
237 | unsigned long bytes; | |
238 | ||
239 | bytes = PAGE_SIZE - offset; | |
240 | if (bytes > len) | |
241 | bytes = len; | |
242 | pb[j].pfn = page_to_pfn(page); | |
243 | pb[j].offset = offset; | |
244 | pb[j].len = bytes; | |
245 | ||
246 | offset += bytes; | |
247 | len -= bytes; | |
248 | ||
249 | if (offset == PAGE_SIZE && len) { | |
250 | page++; | |
251 | offset = 0; | |
252 | j++; | |
253 | } | |
254 | } | |
255 | ||
256 | return j + 1; | |
257 | } | |
258 | ||
8a00251a | 259 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
a9f2e2d6 KS |
260 | struct hv_netvsc_packet *packet, |
261 | struct hv_page_buffer **page_buf) | |
54a7357f | 262 | { |
a9f2e2d6 | 263 | struct hv_page_buffer *pb = *page_buf; |
54a7357f KS |
264 | u32 slots_used = 0; |
265 | char *data = skb->data; | |
266 | int frags = skb_shinfo(skb)->nr_frags; | |
267 | int i; | |
268 | ||
269 | /* The packet is laid out thus: | |
aa0a34be | 270 | * 1. hdr: RNDIS header and PPI |
54a7357f KS |
271 | * 2. skb linear data |
272 | * 3. skb fragment data | |
273 | */ | |
274 | if (hdr != NULL) | |
275 | slots_used += fill_pg_buf(virt_to_page(hdr), | |
276 | offset_in_page(hdr), | |
277 | len, &pb[slots_used]); | |
278 | ||
aa0a34be HZ |
279 | packet->rmsg_size = len; |
280 | packet->rmsg_pgcnt = slots_used; | |
281 | ||
54a7357f KS |
282 | slots_used += fill_pg_buf(virt_to_page(data), |
283 | offset_in_page(data), | |
284 | skb_headlen(skb), &pb[slots_used]); | |
285 | ||
286 | for (i = 0; i < frags; i++) { | |
287 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
288 | ||
289 | slots_used += fill_pg_buf(skb_frag_page(frag), | |
290 | frag->page_offset, | |
291 | skb_frag_size(frag), &pb[slots_used]); | |
292 | } | |
8a00251a | 293 | return slots_used; |
54a7357f KS |
294 | } |
295 | ||
296 | static int count_skb_frag_slots(struct sk_buff *skb) | |
297 | { | |
298 | int i, frags = skb_shinfo(skb)->nr_frags; | |
299 | int pages = 0; | |
300 | ||
301 | for (i = 0; i < frags; i++) { | |
302 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
303 | unsigned long size = skb_frag_size(frag); | |
304 | unsigned long offset = frag->page_offset; | |
305 | ||
306 | /* Skip unused frames from start of page */ | |
307 | offset &= ~PAGE_MASK; | |
308 | pages += PFN_UP(offset + size); | |
309 | } | |
310 | return pages; | |
311 | } | |
312 | ||
313 | static int netvsc_get_slots(struct sk_buff *skb) | |
314 | { | |
315 | char *data = skb->data; | |
316 | unsigned int offset = offset_in_page(data); | |
317 | unsigned int len = skb_headlen(skb); | |
318 | int slots; | |
319 | int frag_slots; | |
320 | ||
321 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); | |
322 | frag_slots = count_skb_frag_slots(skb); | |
323 | return slots + frag_slots; | |
324 | } | |
325 | ||
08cd04bf KS |
326 | static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off) |
327 | { | |
328 | u32 ret_val = TRANSPORT_INFO_NOT_IP; | |
329 | ||
330 | if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) && | |
331 | (eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) { | |
332 | goto not_ip; | |
333 | } | |
334 | ||
335 | *trans_off = skb_transport_offset(skb); | |
336 | ||
337 | if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) { | |
338 | struct iphdr *iphdr = ip_hdr(skb); | |
339 | ||
340 | if (iphdr->protocol == IPPROTO_TCP) | |
341 | ret_val = TRANSPORT_INFO_IPV4_TCP; | |
342 | else if (iphdr->protocol == IPPROTO_UDP) | |
343 | ret_val = TRANSPORT_INFO_IPV4_UDP; | |
344 | } else { | |
345 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) | |
346 | ret_val = TRANSPORT_INFO_IPV6_TCP; | |
347 | else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) | |
348 | ret_val = TRANSPORT_INFO_IPV6_UDP; | |
349 | } | |
350 | ||
351 | not_ip: | |
352 | return ret_val; | |
353 | } | |
354 | ||
02fafbc6 | 355 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 356 | { |
fceaf24a | 357 | struct net_device_context *net_device_ctx = netdev_priv(net); |
981a1bd8 | 358 | struct hv_netvsc_packet *packet = NULL; |
02fafbc6 | 359 | int ret; |
8a00251a KS |
360 | unsigned int num_data_pgs; |
361 | struct rndis_message *rndis_msg; | |
362 | struct rndis_packet *rndis_pkt; | |
363 | u32 rndis_msg_size; | |
364 | bool isvlan; | |
e88f7e07 | 365 | bool linear = false; |
8a00251a | 366 | struct rndis_per_packet_info *ppi; |
08cd04bf | 367 | struct ndis_tcp_ip_checksum_info *csum_info; |
77bf5487 | 368 | struct ndis_tcp_lso_info *lso_info; |
08cd04bf KS |
369 | int hdr_offset; |
370 | u32 net_trans_info; | |
307f0995 | 371 | u32 hash; |
e88f7e07 | 372 | u32 skb_length; |
b08cc791 | 373 | struct hv_page_buffer page_buf[MAX_PAGE_BUFFER_COUNT]; |
a9f2e2d6 | 374 | struct hv_page_buffer *pb = page_buf; |
7eafd9b4 | 375 | struct netvsc_stats *tx_stats = this_cpu_ptr(net_device_ctx->tx_stats); |
fceaf24a | 376 | |
54a7357f KS |
377 | /* We will atmost need two pages to describe the rndis |
378 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number | |
e88f7e07 VK |
379 | * of pages in a single packet. If skb is scattered around |
380 | * more pages we try linearizing it. | |
54a7357f | 381 | */ |
e88f7e07 VK |
382 | |
383 | check_size: | |
384 | skb_length = skb->len; | |
8a00251a | 385 | num_data_pgs = netvsc_get_slots(skb) + 2; |
e88f7e07 VK |
386 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT && linear) { |
387 | net_alert_ratelimited("packet too big: %u pages (%u bytes)\n", | |
388 | num_data_pgs, skb->len); | |
981a1bd8 VK |
389 | ret = -EFAULT; |
390 | goto drop; | |
e88f7e07 VK |
391 | } else if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { |
392 | if (skb_linearize(skb)) { | |
393 | net_alert_ratelimited("failed to linearize skb\n"); | |
394 | ret = -ENOMEM; | |
395 | goto drop; | |
396 | } | |
397 | linear = true; | |
398 | goto check_size; | |
54a7357f | 399 | } |
fceaf24a | 400 | |
c0eb4540 KS |
401 | /* |
402 | * Place the rndis header in the skb head room and | |
403 | * the skb->cb will be used for hv_netvsc_packet | |
404 | * structure. | |
405 | */ | |
406 | ret = skb_cow_head(skb, RNDIS_AND_PPI_SIZE); | |
b56fc3c5 KS |
407 | if (ret) { |
408 | netdev_err(net, "unable to alloc hv_netvsc_packet\n"); | |
409 | ret = -ENOMEM; | |
410 | goto drop; | |
fceaf24a | 411 | } |
c0eb4540 KS |
412 | /* Use the skb control buffer for building up the packet */ |
413 | BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) > | |
414 | FIELD_SIZEOF(struct sk_buff, cb)); | |
415 | packet = (struct hv_netvsc_packet *)skb->cb; | |
fceaf24a | 416 | |
1f5f3a75 | 417 | |
5b54dac8 HZ |
418 | packet->q_idx = skb_get_queue_mapping(skb); |
419 | ||
4d447c9a | 420 | packet->total_data_buflen = skb->len; |
fceaf24a | 421 | |
c0eb4540 | 422 | rndis_msg = (struct rndis_message *)skb->head; |
b08cc791 | 423 | |
24476760 | 424 | memset(rndis_msg, 0, RNDIS_AND_PPI_SIZE); |
fceaf24a | 425 | |
760d1e36 | 426 | isvlan = skb->vlan_tci & VLAN_TAG_PRESENT; |
8a00251a KS |
427 | |
428 | /* Add the rndis header */ | |
8a00251a KS |
429 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; |
430 | rndis_msg->msg_len = packet->total_data_buflen; | |
431 | rndis_pkt = &rndis_msg->msg.pkt; | |
432 | rndis_pkt->data_offset = sizeof(struct rndis_packet); | |
433 | rndis_pkt->data_len = packet->total_data_buflen; | |
434 | rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); | |
435 | ||
436 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); | |
437 | ||
307f0995 HZ |
438 | hash = skb_get_hash_raw(skb); |
439 | if (hash != 0 && net->real_num_tx_queues > 1) { | |
440 | rndis_msg_size += NDIS_HASH_PPI_SIZE; | |
441 | ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE, | |
442 | NBL_HASH_VALUE); | |
443 | *(u32 *)((void *)ppi + ppi->ppi_offset) = hash; | |
444 | } | |
445 | ||
8a00251a KS |
446 | if (isvlan) { |
447 | struct ndis_pkt_8021q_info *vlan; | |
448 | ||
449 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; | |
450 | ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, | |
451 | IEEE_8021Q_INFO); | |
452 | vlan = (struct ndis_pkt_8021q_info *)((void *)ppi + | |
453 | ppi->ppi_offset); | |
760d1e36 KS |
454 | vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK; |
455 | vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >> | |
8a00251a KS |
456 | VLAN_PRIO_SHIFT; |
457 | } | |
458 | ||
08cd04bf KS |
459 | net_trans_info = get_net_transport_info(skb, &hdr_offset); |
460 | if (net_trans_info == TRANSPORT_INFO_NOT_IP) | |
461 | goto do_send; | |
462 | ||
463 | /* | |
464 | * Setup the sendside checksum offload only if this is not a | |
465 | * GSO packet. | |
466 | */ | |
467 | if (skb_is_gso(skb)) | |
77bf5487 | 468 | goto do_lso; |
08cd04bf | 469 | |
22041fb0 KS |
470 | if ((skb->ip_summed == CHECKSUM_NONE) || |
471 | (skb->ip_summed == CHECKSUM_UNNECESSARY)) | |
472 | goto do_send; | |
473 | ||
08cd04bf KS |
474 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; |
475 | ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, | |
476 | TCPIP_CHKSUM_PKTINFO); | |
477 | ||
478 | csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + | |
479 | ppi->ppi_offset); | |
480 | ||
481 | if (net_trans_info & (INFO_IPV4 << 16)) | |
482 | csum_info->transmit.is_ipv4 = 1; | |
483 | else | |
484 | csum_info->transmit.is_ipv6 = 1; | |
485 | ||
486 | if (net_trans_info & INFO_TCP) { | |
487 | csum_info->transmit.tcp_checksum = 1; | |
488 | csum_info->transmit.tcp_header_offset = hdr_offset; | |
489 | } else if (net_trans_info & INFO_UDP) { | |
af9893a3 KS |
490 | /* UDP checksum offload is not supported on ws2008r2. |
491 | * Furthermore, on ws2012 and ws2012r2, there are some | |
492 | * issues with udp checksum offload from Linux guests. | |
493 | * (these are host issues). | |
494 | * For now compute the checksum here. | |
495 | */ | |
496 | struct udphdr *uh; | |
497 | u16 udp_len; | |
498 | ||
499 | ret = skb_cow_head(skb, 0); | |
500 | if (ret) | |
501 | goto drop; | |
502 | ||
503 | uh = udp_hdr(skb); | |
504 | udp_len = ntohs(uh->len); | |
505 | uh->check = 0; | |
506 | uh->check = csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
507 | ip_hdr(skb)->daddr, | |
508 | udp_len, IPPROTO_UDP, | |
509 | csum_partial(uh, udp_len, 0)); | |
510 | if (uh->check == 0) | |
511 | uh->check = CSUM_MANGLED_0; | |
512 | ||
513 | csum_info->transmit.udp_checksum = 0; | |
08cd04bf | 514 | } |
77bf5487 KS |
515 | goto do_send; |
516 | ||
517 | do_lso: | |
518 | rndis_msg_size += NDIS_LSO_PPI_SIZE; | |
519 | ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, | |
520 | TCP_LARGESEND_PKTINFO); | |
521 | ||
522 | lso_info = (struct ndis_tcp_lso_info *)((void *)ppi + | |
523 | ppi->ppi_offset); | |
524 | ||
525 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; | |
526 | if (net_trans_info & (INFO_IPV4 << 16)) { | |
527 | lso_info->lso_v2_transmit.ip_version = | |
528 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; | |
529 | ip_hdr(skb)->tot_len = 0; | |
530 | ip_hdr(skb)->check = 0; | |
531 | tcp_hdr(skb)->check = | |
532 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
533 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
534 | } else { | |
535 | lso_info->lso_v2_transmit.ip_version = | |
536 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; | |
537 | ipv6_hdr(skb)->payload_len = 0; | |
538 | tcp_hdr(skb)->check = | |
539 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
540 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
541 | } | |
542 | lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset; | |
543 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; | |
08cd04bf KS |
544 | |
545 | do_send: | |
8a00251a KS |
546 | /* Start filling in the page buffers with the rndis hdr */ |
547 | rndis_msg->msg_len += rndis_msg_size; | |
942396b0 | 548 | packet->total_data_buflen = rndis_msg->msg_len; |
8a00251a | 549 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, |
a9f2e2d6 | 550 | skb, packet, &pb); |
8a00251a | 551 | |
76d13b56 | 552 | /* timestamp packet in software */ |
553 | skb_tx_timestamp(skb); | |
3a3d9a0a KS |
554 | ret = netvsc_send(net_device_ctx->device_ctx, packet, |
555 | rndis_msg, &pb, skb); | |
8a00251a | 556 | |
af9893a3 | 557 | drop: |
02fafbc6 | 558 | if (ret == 0) { |
4b02b58b | 559 | u64_stats_update_begin(&tx_stats->syncp); |
7eafd9b4 | 560 | tx_stats->packets++; |
561 | tx_stats->bytes += skb_length; | |
4b02b58b | 562 | u64_stats_update_end(&tx_stats->syncp); |
b220f5f9 | 563 | } else { |
33be96e4 HZ |
564 | if (ret != -EAGAIN) { |
565 | dev_kfree_skb_any(skb); | |
566 | net->stats.tx_dropped++; | |
567 | } | |
fceaf24a HJ |
568 | } |
569 | ||
33be96e4 | 570 | return (ret == -EAGAIN) ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
fceaf24a HJ |
571 | } |
572 | ||
3e189519 | 573 | /* |
02fafbc6 GKH |
574 | * netvsc_linkstatus_callback - Link up/down notification |
575 | */ | |
90ef117a | 576 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
3a494e71 | 577 | struct rndis_message *resp) |
fceaf24a | 578 | { |
3a494e71 | 579 | struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
2ddd5e5f | 580 | struct net_device *net; |
c996edcf | 581 | struct net_device_context *ndev_ctx; |
27a70af3 VK |
582 | struct netvsc_reconfig *event; |
583 | unsigned long flags; | |
891de74d | 584 | |
27a70af3 VK |
585 | /* Handle link change statuses only */ |
586 | if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE && | |
587 | indicate->status != RNDIS_STATUS_MEDIA_CONNECT && | |
588 | indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT) | |
3a494e71 | 589 | return; |
891de74d | 590 | |
3d541ac5 | 591 | net = hv_get_drvdata(device_obj); |
fceaf24a | 592 | |
891de74d | 593 | if (!net || net->reg_state != NETREG_REGISTERED) |
fceaf24a | 594 | return; |
fceaf24a | 595 | |
891de74d | 596 | ndev_ctx = netdev_priv(net); |
27a70af3 VK |
597 | |
598 | event = kzalloc(sizeof(*event), GFP_ATOMIC); | |
599 | if (!event) | |
600 | return; | |
601 | event->event = indicate->status; | |
602 | ||
603 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
604 | list_add_tail(&event->list, &ndev_ctx->reconfig_events); | |
605 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
606 | ||
607 | schedule_delayed_work(&ndev_ctx->dwork, 0); | |
fceaf24a HJ |
608 | } |
609 | ||
84bf9cef KS |
610 | |
611 | static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net, | |
e3d605ed | 612 | struct hv_netvsc_packet *packet, |
25b85ee8 | 613 | struct ndis_tcp_ip_checksum_info *csum_info, |
84bf9cef | 614 | void *data, u16 vlan_tci) |
fceaf24a | 615 | { |
fceaf24a | 616 | struct sk_buff *skb; |
fceaf24a | 617 | |
72a2f5bd | 618 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
84bf9cef KS |
619 | if (!skb) |
620 | return skb; | |
fceaf24a | 621 | |
02fafbc6 GKH |
622 | /* |
623 | * Copy to skb. This copy is needed here since the memory pointed by | |
624 | * hv_netvsc_packet cannot be deallocated | |
625 | */ | |
84bf9cef KS |
626 | memcpy(skb_put(skb, packet->total_data_buflen), data, |
627 | packet->total_data_buflen); | |
fceaf24a HJ |
628 | |
629 | skb->protocol = eth_type_trans(skb, net); | |
e3d605ed KS |
630 | if (csum_info) { |
631 | /* We only look at the IP checksum here. | |
632 | * Should we be dropping the packet if checksum | |
633 | * failed? How do we deal with other checksums - TCP/UDP? | |
634 | */ | |
635 | if (csum_info->receive.ip_checksum_succeeded) | |
636 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
637 | else | |
638 | skb->ip_summed = CHECKSUM_NONE; | |
639 | } | |
640 | ||
760d1e36 | 641 | if (vlan_tci & VLAN_TAG_PRESENT) |
93725cbd | 642 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
760d1e36 | 643 | vlan_tci); |
fceaf24a | 644 | |
84bf9cef KS |
645 | return skb; |
646 | } | |
647 | ||
648 | /* | |
649 | * netvsc_recv_callback - Callback when we receive a packet from the | |
650 | * "wire" on the specified device. | |
651 | */ | |
652 | int netvsc_recv_callback(struct hv_device *device_obj, | |
653 | struct hv_netvsc_packet *packet, | |
654 | void **data, | |
655 | struct ndis_tcp_ip_checksum_info *csum_info, | |
656 | struct vmbus_channel *channel, | |
657 | u16 vlan_tci) | |
658 | { | |
3d541ac5 VK |
659 | struct net_device *net = hv_get_drvdata(device_obj); |
660 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
84bf9cef KS |
661 | struct sk_buff *skb; |
662 | struct sk_buff *vf_skb; | |
663 | struct netvsc_stats *rx_stats; | |
3d541ac5 | 664 | struct netvsc_device *netvsc_dev = net_device_ctx->nvdev; |
84bf9cef KS |
665 | u32 bytes_recvd = packet->total_data_buflen; |
666 | int ret = 0; | |
667 | ||
84bf9cef KS |
668 | if (!net || net->reg_state != NETREG_REGISTERED) |
669 | return NVSP_STAT_FAIL; | |
670 | ||
671 | if (READ_ONCE(netvsc_dev->vf_inject)) { | |
672 | atomic_inc(&netvsc_dev->vf_use_cnt); | |
673 | if (!READ_ONCE(netvsc_dev->vf_inject)) { | |
674 | /* | |
675 | * We raced; just move on. | |
676 | */ | |
677 | atomic_dec(&netvsc_dev->vf_use_cnt); | |
678 | goto vf_injection_done; | |
679 | } | |
680 | ||
681 | /* | |
682 | * Inject this packet into the VF inerface. | |
683 | * On Hyper-V, multicast and brodcast packets | |
684 | * are only delivered on the synthetic interface | |
685 | * (after subjecting these to policy filters on | |
686 | * the host). Deliver these via the VF interface | |
687 | * in the guest. | |
688 | */ | |
689 | vf_skb = netvsc_alloc_recv_skb(netvsc_dev->vf_netdev, packet, | |
690 | csum_info, *data, vlan_tci); | |
691 | if (vf_skb != NULL) { | |
692 | ++netvsc_dev->vf_netdev->stats.rx_packets; | |
693 | netvsc_dev->vf_netdev->stats.rx_bytes += bytes_recvd; | |
694 | netif_receive_skb(vf_skb); | |
695 | } else { | |
696 | ++net->stats.rx_dropped; | |
697 | ret = NVSP_STAT_FAIL; | |
698 | } | |
699 | atomic_dec(&netvsc_dev->vf_use_cnt); | |
700 | return ret; | |
701 | } | |
702 | ||
703 | vf_injection_done: | |
704 | net_device_ctx = netdev_priv(net); | |
705 | rx_stats = this_cpu_ptr(net_device_ctx->rx_stats); | |
706 | ||
707 | /* Allocate a skb - TODO direct I/O to pages? */ | |
708 | skb = netvsc_alloc_recv_skb(net, packet, csum_info, *data, vlan_tci); | |
709 | if (unlikely(!skb)) { | |
710 | ++net->stats.rx_dropped; | |
711 | return NVSP_STAT_FAIL; | |
712 | } | |
25b85ee8 | 713 | skb_record_rx_queue(skb, channel-> |
e565e803 | 714 | offermsg.offer.sub_channel_index); |
5b54dac8 | 715 | |
4b02b58b | 716 | u64_stats_update_begin(&rx_stats->syncp); |
7eafd9b4 | 717 | rx_stats->packets++; |
718 | rx_stats->bytes += packet->total_data_buflen; | |
4b02b58b | 719 | u64_stats_update_end(&rx_stats->syncp); |
9495c282 | 720 | |
02fafbc6 GKH |
721 | /* |
722 | * Pass the skb back up. Network stack will deallocate the skb when it | |
9495c282 SH |
723 | * is done. |
724 | * TODO - use NAPI? | |
02fafbc6 | 725 | */ |
9495c282 | 726 | netif_rx(skb); |
fceaf24a | 727 | |
fceaf24a HJ |
728 | return 0; |
729 | } | |
730 | ||
f82f4ad7 SH |
731 | static void netvsc_get_drvinfo(struct net_device *net, |
732 | struct ethtool_drvinfo *info) | |
733 | { | |
7826d43f | 734 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 735 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
f82f4ad7 SH |
736 | } |
737 | ||
59995370 AS |
738 | static void netvsc_get_channels(struct net_device *net, |
739 | struct ethtool_channels *channel) | |
740 | { | |
741 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
3d541ac5 | 742 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
59995370 AS |
743 | |
744 | if (nvdev) { | |
745 | channel->max_combined = nvdev->max_chn; | |
746 | channel->combined_count = nvdev->num_chn; | |
747 | } | |
748 | } | |
749 | ||
b5960e6e AS |
750 | static int netvsc_set_channels(struct net_device *net, |
751 | struct ethtool_channels *channels) | |
752 | { | |
753 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
754 | struct hv_device *dev = net_device_ctx->device_ctx; | |
3d541ac5 | 755 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
b5960e6e | 756 | struct netvsc_device_info device_info; |
954591b9 AS |
757 | u32 num_chn; |
758 | u32 max_chn; | |
b5960e6e AS |
759 | int ret = 0; |
760 | bool recovering = false; | |
761 | ||
6da7225f | 762 | if (net_device_ctx->start_remove || !nvdev || nvdev->destroy) |
b5960e6e AS |
763 | return -ENODEV; |
764 | ||
954591b9 AS |
765 | num_chn = nvdev->num_chn; |
766 | max_chn = min_t(u32, nvdev->max_chn, num_online_cpus()); | |
767 | ||
b5960e6e AS |
768 | if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) { |
769 | pr_info("vRSS unsupported before NVSP Version 5\n"); | |
770 | return -EINVAL; | |
771 | } | |
772 | ||
773 | /* We do not support rx, tx, or other */ | |
774 | if (!channels || | |
775 | channels->rx_count || | |
776 | channels->tx_count || | |
777 | channels->other_count || | |
778 | (channels->combined_count < 1)) | |
779 | return -EINVAL; | |
780 | ||
781 | if (channels->combined_count > max_chn) { | |
782 | pr_info("combined channels too high, using %d\n", max_chn); | |
783 | channels->combined_count = max_chn; | |
784 | } | |
785 | ||
786 | ret = netvsc_close(net); | |
787 | if (ret) | |
788 | goto out; | |
789 | ||
790 | do_set: | |
f580aec4 | 791 | net_device_ctx->start_remove = true; |
b5960e6e AS |
792 | rndis_filter_device_remove(dev); |
793 | ||
794 | nvdev->num_chn = channels->combined_count; | |
795 | ||
b5960e6e AS |
796 | memset(&device_info, 0, sizeof(device_info)); |
797 | device_info.num_chn = nvdev->num_chn; /* passed to RNDIS */ | |
798 | device_info.ring_size = ring_size; | |
799 | device_info.max_num_vrss_chns = max_num_vrss_chns; | |
800 | ||
801 | ret = rndis_filter_device_add(dev, &device_info); | |
802 | if (ret) { | |
803 | if (recovering) { | |
804 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
805 | return ret; | |
806 | } | |
807 | goto recover; | |
808 | } | |
809 | ||
3d541ac5 | 810 | nvdev = net_device_ctx->nvdev; |
b5960e6e AS |
811 | |
812 | ret = netif_set_real_num_tx_queues(net, nvdev->num_chn); | |
813 | if (ret) { | |
814 | if (recovering) { | |
815 | netdev_err(net, "could not set tx queue count (ret %d)\n", ret); | |
816 | return ret; | |
817 | } | |
818 | goto recover; | |
819 | } | |
820 | ||
821 | ret = netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
822 | if (ret) { | |
823 | if (recovering) { | |
824 | netdev_err(net, "could not set rx queue count (ret %d)\n", ret); | |
825 | return ret; | |
826 | } | |
827 | goto recover; | |
828 | } | |
829 | ||
830 | out: | |
831 | netvsc_open(net); | |
f580aec4 | 832 | net_device_ctx->start_remove = false; |
1bdcec8a VK |
833 | /* We may have missed link change notifications */ |
834 | schedule_delayed_work(&net_device_ctx->dwork, 0); | |
b5960e6e AS |
835 | |
836 | return ret; | |
837 | ||
838 | recover: | |
839 | /* If the above failed, we attempt to recover through the same | |
840 | * process but with the original number of channels. | |
841 | */ | |
842 | netdev_err(net, "could not set channels, recovering\n"); | |
843 | recovering = true; | |
844 | channels->combined_count = num_chn; | |
845 | goto do_set; | |
846 | } | |
847 | ||
49eb9389 | 848 | static bool netvsc_validate_ethtool_ss_cmd(const struct ethtool_cmd *cmd) |
849 | { | |
850 | struct ethtool_cmd diff1 = *cmd; | |
851 | struct ethtool_cmd diff2 = {}; | |
852 | ||
853 | ethtool_cmd_speed_set(&diff1, 0); | |
854 | diff1.duplex = 0; | |
855 | /* advertising and cmd are usually set */ | |
856 | diff1.advertising = 0; | |
857 | diff1.cmd = 0; | |
858 | /* We set port to PORT_OTHER */ | |
859 | diff2.port = PORT_OTHER; | |
860 | ||
861 | return !memcmp(&diff1, &diff2, sizeof(diff1)); | |
862 | } | |
863 | ||
864 | static void netvsc_init_settings(struct net_device *dev) | |
865 | { | |
866 | struct net_device_context *ndc = netdev_priv(dev); | |
867 | ||
868 | ndc->speed = SPEED_UNKNOWN; | |
869 | ndc->duplex = DUPLEX_UNKNOWN; | |
870 | } | |
871 | ||
872 | static int netvsc_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
873 | { | |
874 | struct net_device_context *ndc = netdev_priv(dev); | |
875 | ||
876 | ethtool_cmd_speed_set(cmd, ndc->speed); | |
877 | cmd->duplex = ndc->duplex; | |
878 | cmd->port = PORT_OTHER; | |
879 | ||
880 | return 0; | |
881 | } | |
882 | ||
883 | static int netvsc_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
884 | { | |
885 | struct net_device_context *ndc = netdev_priv(dev); | |
886 | u32 speed; | |
887 | ||
888 | speed = ethtool_cmd_speed(cmd); | |
889 | if (!ethtool_validate_speed(speed) || | |
890 | !ethtool_validate_duplex(cmd->duplex) || | |
891 | !netvsc_validate_ethtool_ss_cmd(cmd)) | |
892 | return -EINVAL; | |
893 | ||
894 | ndc->speed = speed; | |
895 | ndc->duplex = cmd->duplex; | |
896 | ||
897 | return 0; | |
898 | } | |
899 | ||
4d447c9a HZ |
900 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
901 | { | |
902 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
3d541ac5 VK |
903 | struct netvsc_device *nvdev = ndevctx->nvdev; |
904 | struct hv_device *hdev = ndevctx->device_ctx; | |
4d447c9a HZ |
905 | struct netvsc_device_info device_info; |
906 | int limit = ETH_DATA_LEN; | |
d212b463 | 907 | u32 num_chn; |
2de8530b | 908 | int ret = 0; |
4d447c9a | 909 | |
6da7225f | 910 | if (ndevctx->start_remove || !nvdev || nvdev->destroy) |
4d447c9a HZ |
911 | return -ENODEV; |
912 | ||
a1eabb01 | 913 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) |
4d3c9d37 | 914 | limit = NETVSC_MTU - ETH_HLEN; |
4d447c9a | 915 | |
f9cbce34 | 916 | if (mtu < NETVSC_MTU_MIN || mtu > limit) |
4d447c9a HZ |
917 | return -EINVAL; |
918 | ||
2de8530b HZ |
919 | ret = netvsc_close(ndev); |
920 | if (ret) | |
921 | goto out; | |
922 | ||
d212b463 HZ |
923 | num_chn = nvdev->num_chn; |
924 | ||
f580aec4 | 925 | ndevctx->start_remove = true; |
4d447c9a HZ |
926 | rndis_filter_device_remove(hdev); |
927 | ||
928 | ndev->mtu = mtu; | |
929 | ||
8ebdcc52 | 930 | memset(&device_info, 0, sizeof(device_info)); |
4d447c9a | 931 | device_info.ring_size = ring_size; |
d212b463 | 932 | device_info.num_chn = num_chn; |
e01ec219 | 933 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
4d447c9a | 934 | rndis_filter_device_add(hdev, &device_info); |
4d447c9a | 935 | |
2de8530b HZ |
936 | out: |
937 | netvsc_open(ndev); | |
f580aec4 | 938 | ndevctx->start_remove = false; |
2de8530b | 939 | |
1bdcec8a VK |
940 | /* We may have missed link change notifications */ |
941 | schedule_delayed_work(&ndevctx->dwork, 0); | |
942 | ||
2de8530b | 943 | return ret; |
4d447c9a HZ |
944 | } |
945 | ||
7eafd9b4 | 946 | static struct rtnl_link_stats64 *netvsc_get_stats64(struct net_device *net, |
947 | struct rtnl_link_stats64 *t) | |
948 | { | |
949 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
950 | int cpu; | |
951 | ||
952 | for_each_possible_cpu(cpu) { | |
953 | struct netvsc_stats *tx_stats = per_cpu_ptr(ndev_ctx->tx_stats, | |
954 | cpu); | |
955 | struct netvsc_stats *rx_stats = per_cpu_ptr(ndev_ctx->rx_stats, | |
956 | cpu); | |
957 | u64 tx_packets, tx_bytes, rx_packets, rx_bytes; | |
958 | unsigned int start; | |
959 | ||
960 | do { | |
4b02b58b | 961 | start = u64_stats_fetch_begin_irq(&tx_stats->syncp); |
7eafd9b4 | 962 | tx_packets = tx_stats->packets; |
963 | tx_bytes = tx_stats->bytes; | |
4b02b58b | 964 | } while (u64_stats_fetch_retry_irq(&tx_stats->syncp, start)); |
7eafd9b4 | 965 | |
966 | do { | |
4b02b58b | 967 | start = u64_stats_fetch_begin_irq(&rx_stats->syncp); |
7eafd9b4 | 968 | rx_packets = rx_stats->packets; |
969 | rx_bytes = rx_stats->bytes; | |
4b02b58b | 970 | } while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start)); |
7eafd9b4 | 971 | |
972 | t->tx_bytes += tx_bytes; | |
973 | t->tx_packets += tx_packets; | |
974 | t->rx_bytes += rx_bytes; | |
975 | t->rx_packets += rx_packets; | |
976 | } | |
977 | ||
978 | t->tx_dropped = net->stats.tx_dropped; | |
979 | t->tx_errors = net->stats.tx_dropped; | |
980 | ||
981 | t->rx_dropped = net->stats.rx_dropped; | |
982 | t->rx_errors = net->stats.rx_errors; | |
983 | ||
984 | return t; | |
985 | } | |
1ce09e89 HZ |
986 | |
987 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
988 | { | |
989 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
990 | struct hv_device *hdev = ndevctx->device_ctx; | |
991 | struct sockaddr *addr = p; | |
9a4c831e | 992 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
993 | unsigned char save_aatype; |
994 | int err; | |
995 | ||
996 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
997 | save_aatype = ndev->addr_assign_type; | |
998 | ||
999 | err = eth_mac_addr(ndev, p); | |
1000 | if (err != 0) | |
1001 | return err; | |
1002 | ||
1003 | err = rndis_filter_set_device_mac(hdev, addr->sa_data); | |
1004 | if (err != 0) { | |
1005 | /* roll back to saved MAC */ | |
1006 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
1007 | ndev->addr_assign_type = save_aatype; | |
1008 | } | |
1009 | ||
1010 | return err; | |
1011 | } | |
1012 | ||
316158fe RW |
1013 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1014 | static void netvsc_poll_controller(struct net_device *net) | |
1015 | { | |
1016 | /* As netvsc_start_xmit() works synchronous we don't have to | |
1017 | * trigger anything here. | |
1018 | */ | |
1019 | } | |
1020 | #endif | |
1ce09e89 | 1021 | |
f82f4ad7 SH |
1022 | static const struct ethtool_ops ethtool_ops = { |
1023 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 | 1024 | .get_link = ethtool_op_get_link, |
59995370 | 1025 | .get_channels = netvsc_get_channels, |
b5960e6e | 1026 | .set_channels = netvsc_set_channels, |
76d13b56 | 1027 | .get_ts_info = ethtool_op_get_ts_info, |
49eb9389 | 1028 | .get_settings = netvsc_get_settings, |
1029 | .set_settings = netvsc_set_settings, | |
f82f4ad7 SH |
1030 | }; |
1031 | ||
df2fff28 GKH |
1032 | static const struct net_device_ops device_ops = { |
1033 | .ndo_open = netvsc_open, | |
1034 | .ndo_stop = netvsc_close, | |
1035 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 1036 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 1037 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 1038 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 1039 | .ndo_set_mac_address = netvsc_set_mac_addr, |
5b54dac8 | 1040 | .ndo_select_queue = netvsc_select_queue, |
7eafd9b4 | 1041 | .ndo_get_stats64 = netvsc_get_stats64, |
316158fe RW |
1042 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1043 | .ndo_poll_controller = netvsc_poll_controller, | |
1044 | #endif | |
df2fff28 GKH |
1045 | }; |
1046 | ||
c996edcf | 1047 | /* |
27a70af3 VK |
1048 | * Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link |
1049 | * down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is | |
1050 | * present send GARP packet to network peers with netif_notify_peers(). | |
c996edcf | 1051 | */ |
891de74d | 1052 | static void netvsc_link_change(struct work_struct *w) |
c996edcf | 1053 | { |
0a1275ca VK |
1054 | struct net_device_context *ndev_ctx = |
1055 | container_of(w, struct net_device_context, dwork.work); | |
1056 | struct hv_device *device_obj = ndev_ctx->device_ctx; | |
1057 | struct net_device *net = hv_get_drvdata(device_obj); | |
2ddd5e5f | 1058 | struct netvsc_device *net_device; |
891de74d | 1059 | struct rndis_device *rdev; |
27a70af3 VK |
1060 | struct netvsc_reconfig *event = NULL; |
1061 | bool notify = false, reschedule = false; | |
1062 | unsigned long flags, next_reconfig, delay; | |
c996edcf | 1063 | |
1bdcec8a VK |
1064 | rtnl_lock(); |
1065 | if (ndev_ctx->start_remove) | |
1066 | goto out_unlock; | |
1067 | ||
3d541ac5 | 1068 | net_device = ndev_ctx->nvdev; |
891de74d | 1069 | rdev = net_device->extension; |
891de74d | 1070 | |
27a70af3 VK |
1071 | next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT; |
1072 | if (time_is_after_jiffies(next_reconfig)) { | |
1073 | /* link_watch only sends one notification with current state | |
1074 | * per second, avoid doing reconfig more frequently. Handle | |
1075 | * wrap around. | |
1076 | */ | |
1077 | delay = next_reconfig - jiffies; | |
1078 | delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT; | |
1079 | schedule_delayed_work(&ndev_ctx->dwork, delay); | |
1bdcec8a | 1080 | goto out_unlock; |
27a70af3 VK |
1081 | } |
1082 | ndev_ctx->last_reconfig = jiffies; | |
1083 | ||
1084 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
1085 | if (!list_empty(&ndev_ctx->reconfig_events)) { | |
1086 | event = list_first_entry(&ndev_ctx->reconfig_events, | |
1087 | struct netvsc_reconfig, list); | |
1088 | list_del(&event->list); | |
1089 | reschedule = !list_empty(&ndev_ctx->reconfig_events); | |
1090 | } | |
1091 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
1092 | ||
1093 | if (!event) | |
1bdcec8a | 1094 | goto out_unlock; |
27a70af3 VK |
1095 | |
1096 | switch (event->event) { | |
1097 | /* Only the following events are possible due to the check in | |
1098 | * netvsc_linkstatus_callback() | |
1099 | */ | |
1100 | case RNDIS_STATUS_MEDIA_CONNECT: | |
1101 | if (rdev->link_state) { | |
1102 | rdev->link_state = false; | |
1103 | netif_carrier_on(net); | |
1104 | netif_tx_wake_all_queues(net); | |
1105 | } else { | |
1106 | notify = true; | |
1107 | } | |
1108 | kfree(event); | |
1109 | break; | |
1110 | case RNDIS_STATUS_MEDIA_DISCONNECT: | |
1111 | if (!rdev->link_state) { | |
1112 | rdev->link_state = true; | |
1113 | netif_carrier_off(net); | |
1114 | netif_tx_stop_all_queues(net); | |
1115 | } | |
1116 | kfree(event); | |
1117 | break; | |
1118 | case RNDIS_STATUS_NETWORK_CHANGE: | |
1119 | /* Only makes sense if carrier is present */ | |
1120 | if (!rdev->link_state) { | |
1121 | rdev->link_state = true; | |
1122 | netif_carrier_off(net); | |
1123 | netif_tx_stop_all_queues(net); | |
1124 | event->event = RNDIS_STATUS_MEDIA_CONNECT; | |
1125 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
15cfd407 | 1126 | list_add(&event->list, &ndev_ctx->reconfig_events); |
27a70af3 VK |
1127 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
1128 | reschedule = true; | |
3a494e71 | 1129 | } |
27a70af3 | 1130 | break; |
891de74d HZ |
1131 | } |
1132 | ||
1133 | rtnl_unlock(); | |
1134 | ||
1135 | if (notify) | |
1136 | netdev_notify_peers(net); | |
27a70af3 VK |
1137 | |
1138 | /* link_watch only sends one notification with current state per | |
1139 | * second, handle next reconfig event in 2 seconds. | |
1140 | */ | |
1141 | if (reschedule) | |
1142 | schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); | |
1bdcec8a VK |
1143 | |
1144 | return; | |
1145 | ||
1146 | out_unlock: | |
1147 | rtnl_unlock(); | |
c996edcf HZ |
1148 | } |
1149 | ||
7eafd9b4 | 1150 | static void netvsc_free_netdev(struct net_device *netdev) |
1151 | { | |
1152 | struct net_device_context *net_device_ctx = netdev_priv(netdev); | |
1153 | ||
1154 | free_percpu(net_device_ctx->tx_stats); | |
1155 | free_percpu(net_device_ctx->rx_stats); | |
1156 | free_netdev(netdev); | |
1157 | } | |
c996edcf | 1158 | |
84bf9cef KS |
1159 | static void netvsc_notify_peers(struct work_struct *wrk) |
1160 | { | |
1161 | struct garp_wrk *gwrk; | |
1162 | ||
1163 | gwrk = container_of(wrk, struct garp_wrk, dwrk); | |
1164 | ||
1165 | netdev_notify_peers(gwrk->netdev); | |
1166 | ||
1167 | atomic_dec(&gwrk->netvsc_dev->vf_use_cnt); | |
1168 | } | |
1169 | ||
0a1275ca | 1170 | static struct net_device *get_netvsc_net_device(char *mac) |
84bf9cef | 1171 | { |
0a1275ca | 1172 | struct net_device *dev, *found = NULL; |
84bf9cef KS |
1173 | int rtnl_locked; |
1174 | ||
1175 | rtnl_locked = rtnl_trylock(); | |
1176 | ||
1177 | for_each_netdev(&init_net, dev) { | |
1178 | if (memcmp(dev->dev_addr, mac, ETH_ALEN) == 0) { | |
1179 | if (dev->netdev_ops != &device_ops) | |
1180 | continue; | |
0a1275ca | 1181 | found = dev; |
84bf9cef KS |
1182 | break; |
1183 | } | |
1184 | } | |
1185 | if (rtnl_locked) | |
1186 | rtnl_unlock(); | |
1187 | ||
0a1275ca | 1188 | return found; |
84bf9cef KS |
1189 | } |
1190 | ||
1191 | static int netvsc_register_vf(struct net_device *vf_netdev) | |
1192 | { | |
0a1275ca VK |
1193 | struct net_device *ndev; |
1194 | struct net_device_context *net_device_ctx; | |
84bf9cef KS |
1195 | struct netvsc_device *netvsc_dev; |
1196 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
1197 | ||
1198 | if (eth_ops == NULL || eth_ops == ðtool_ops) | |
1199 | return NOTIFY_DONE; | |
1200 | ||
1201 | /* | |
1202 | * We will use the MAC address to locate the synthetic interface to | |
1203 | * associate with the VF interface. If we don't find a matching | |
1204 | * synthetic interface, move on. | |
1205 | */ | |
0a1275ca VK |
1206 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1207 | if (!ndev) | |
1208 | return NOTIFY_DONE; | |
1209 | ||
1210 | net_device_ctx = netdev_priv(ndev); | |
1211 | netvsc_dev = net_device_ctx->nvdev; | |
84bf9cef KS |
1212 | if (netvsc_dev == NULL) |
1213 | return NOTIFY_DONE; | |
1214 | ||
0a1275ca | 1215 | netdev_info(ndev, "VF registering: %s\n", vf_netdev->name); |
84bf9cef KS |
1216 | /* |
1217 | * Take a reference on the module. | |
1218 | */ | |
1219 | try_module_get(THIS_MODULE); | |
1220 | netvsc_dev->vf_netdev = vf_netdev; | |
1221 | return NOTIFY_OK; | |
1222 | } | |
1223 | ||
1224 | ||
1225 | static int netvsc_vf_up(struct net_device *vf_netdev) | |
1226 | { | |
0a1275ca | 1227 | struct net_device *ndev; |
84bf9cef KS |
1228 | struct netvsc_device *netvsc_dev; |
1229 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
1230 | struct net_device_context *net_device_ctx; | |
1231 | ||
1232 | if (eth_ops == ðtool_ops) | |
1233 | return NOTIFY_DONE; | |
1234 | ||
0a1275ca VK |
1235 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1236 | if (!ndev) | |
1237 | return NOTIFY_DONE; | |
1238 | ||
1239 | net_device_ctx = netdev_priv(ndev); | |
1240 | netvsc_dev = net_device_ctx->nvdev; | |
84bf9cef KS |
1241 | |
1242 | if ((netvsc_dev == NULL) || (netvsc_dev->vf_netdev == NULL)) | |
1243 | return NOTIFY_DONE; | |
1244 | ||
0a1275ca | 1245 | netdev_info(ndev, "VF up: %s\n", vf_netdev->name); |
84bf9cef KS |
1246 | netvsc_dev->vf_inject = true; |
1247 | ||
1248 | /* | |
1249 | * Open the device before switching data path. | |
1250 | */ | |
1251 | rndis_filter_open(net_device_ctx->device_ctx); | |
1252 | ||
1253 | /* | |
1254 | * notify the host to switch the data path. | |
1255 | */ | |
0a1275ca VK |
1256 | netvsc_switch_datapath(ndev, true); |
1257 | netdev_info(ndev, "Data path switched to VF: %s\n", vf_netdev->name); | |
84bf9cef | 1258 | |
0a1275ca | 1259 | netif_carrier_off(ndev); |
84bf9cef KS |
1260 | |
1261 | /* | |
1262 | * Now notify peers. We are scheduling work to | |
1263 | * notify peers; take a reference to prevent | |
1264 | * the VF interface from vanishing. | |
1265 | */ | |
1266 | atomic_inc(&netvsc_dev->vf_use_cnt); | |
1267 | net_device_ctx->gwrk.netdev = vf_netdev; | |
1268 | net_device_ctx->gwrk.netvsc_dev = netvsc_dev; | |
1269 | schedule_work(&net_device_ctx->gwrk.dwrk); | |
1270 | ||
1271 | return NOTIFY_OK; | |
1272 | } | |
1273 | ||
1274 | ||
1275 | static int netvsc_vf_down(struct net_device *vf_netdev) | |
1276 | { | |
0a1275ca | 1277 | struct net_device *ndev; |
84bf9cef KS |
1278 | struct netvsc_device *netvsc_dev; |
1279 | struct net_device_context *net_device_ctx; | |
1280 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
1281 | ||
1282 | if (eth_ops == ðtool_ops) | |
1283 | return NOTIFY_DONE; | |
1284 | ||
0a1275ca VK |
1285 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1286 | if (!ndev) | |
1287 | return NOTIFY_DONE; | |
1288 | ||
1289 | net_device_ctx = netdev_priv(ndev); | |
1290 | netvsc_dev = net_device_ctx->nvdev; | |
84bf9cef KS |
1291 | |
1292 | if ((netvsc_dev == NULL) || (netvsc_dev->vf_netdev == NULL)) | |
1293 | return NOTIFY_DONE; | |
1294 | ||
0a1275ca | 1295 | netdev_info(ndev, "VF down: %s\n", vf_netdev->name); |
84bf9cef KS |
1296 | netvsc_dev->vf_inject = false; |
1297 | /* | |
1298 | * Wait for currently active users to | |
1299 | * drain out. | |
1300 | */ | |
1301 | ||
1302 | while (atomic_read(&netvsc_dev->vf_use_cnt) != 0) | |
1303 | udelay(50); | |
0a1275ca VK |
1304 | netvsc_switch_datapath(ndev, false); |
1305 | netdev_info(ndev, "Data path switched from VF: %s\n", vf_netdev->name); | |
84bf9cef | 1306 | rndis_filter_close(net_device_ctx->device_ctx); |
0a1275ca | 1307 | netif_carrier_on(ndev); |
84bf9cef KS |
1308 | /* |
1309 | * Notify peers. | |
1310 | */ | |
1311 | atomic_inc(&netvsc_dev->vf_use_cnt); | |
0a1275ca | 1312 | net_device_ctx->gwrk.netdev = ndev; |
84bf9cef KS |
1313 | net_device_ctx->gwrk.netvsc_dev = netvsc_dev; |
1314 | schedule_work(&net_device_ctx->gwrk.dwrk); | |
1315 | ||
1316 | return NOTIFY_OK; | |
1317 | } | |
1318 | ||
1319 | ||
1320 | static int netvsc_unregister_vf(struct net_device *vf_netdev) | |
1321 | { | |
0a1275ca | 1322 | struct net_device *ndev; |
84bf9cef KS |
1323 | struct netvsc_device *netvsc_dev; |
1324 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
0a1275ca | 1325 | struct net_device_context *net_device_ctx; |
84bf9cef KS |
1326 | |
1327 | if (eth_ops == ðtool_ops) | |
1328 | return NOTIFY_DONE; | |
1329 | ||
0a1275ca VK |
1330 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1331 | if (!ndev) | |
1332 | return NOTIFY_DONE; | |
1333 | ||
1334 | net_device_ctx = netdev_priv(ndev); | |
1335 | netvsc_dev = net_device_ctx->nvdev; | |
84bf9cef KS |
1336 | if (netvsc_dev == NULL) |
1337 | return NOTIFY_DONE; | |
0a1275ca | 1338 | netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); |
84bf9cef KS |
1339 | |
1340 | netvsc_dev->vf_netdev = NULL; | |
1341 | module_put(THIS_MODULE); | |
1342 | return NOTIFY_OK; | |
1343 | } | |
1344 | ||
84946899 S |
1345 | static int netvsc_probe(struct hv_device *dev, |
1346 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 1347 | { |
df2fff28 GKH |
1348 | struct net_device *net = NULL; |
1349 | struct net_device_context *net_device_ctx; | |
1350 | struct netvsc_device_info device_info; | |
5b54dac8 | 1351 | struct netvsc_device *nvdev; |
df2fff28 GKH |
1352 | int ret; |
1353 | ||
5b54dac8 HZ |
1354 | net = alloc_etherdev_mq(sizeof(struct net_device_context), |
1355 | num_online_cpus()); | |
df2fff28 | 1356 | if (!net) |
51a805d0 | 1357 | return -ENOMEM; |
df2fff28 | 1358 | |
1b07da51 HZ |
1359 | netif_carrier_off(net); |
1360 | ||
df2fff28 | 1361 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 1362 | net_device_ctx->device_ctx = dev; |
3f300ff4 SX |
1363 | net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); |
1364 | if (netif_msg_probe(net_device_ctx)) | |
1365 | netdev_dbg(net, "netvsc msg_enable: %d\n", | |
1366 | net_device_ctx->msg_enable); | |
1367 | ||
7eafd9b4 | 1368 | net_device_ctx->tx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); |
1369 | if (!net_device_ctx->tx_stats) { | |
1370 | free_netdev(net); | |
1371 | return -ENOMEM; | |
1372 | } | |
1373 | net_device_ctx->rx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); | |
1374 | if (!net_device_ctx->rx_stats) { | |
1375 | free_percpu(net_device_ctx->tx_stats); | |
1376 | free_netdev(net); | |
1377 | return -ENOMEM; | |
1378 | } | |
1379 | ||
2ddd5e5f | 1380 | hv_set_drvdata(dev, net); |
f580aec4 VK |
1381 | |
1382 | net_device_ctx->start_remove = false; | |
1383 | ||
891de74d | 1384 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
792df872 | 1385 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
84bf9cef | 1386 | INIT_WORK(&net_device_ctx->gwrk.dwrk, netvsc_notify_peers); |
df2fff28 | 1387 | |
27a70af3 VK |
1388 | spin_lock_init(&net_device_ctx->lock); |
1389 | INIT_LIST_HEAD(&net_device_ctx->reconfig_events); | |
1390 | ||
df2fff28 GKH |
1391 | net->netdev_ops = &device_ops; |
1392 | ||
a060679c | 1393 | net->hw_features = NETVSC_HW_FEATURES; |
1394 | net->features = NETVSC_HW_FEATURES | NETIF_F_HW_VLAN_CTAG_TX; | |
6048718d | 1395 | |
7ad24ea4 | 1396 | net->ethtool_ops = ðtool_ops; |
9efd21e1 | 1397 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 1398 | |
14a03cf8 VK |
1399 | /* We always need headroom for rndis header */ |
1400 | net->needed_headroom = RNDIS_AND_PPI_SIZE; | |
1401 | ||
692e084e | 1402 | /* Notify the netvsc driver of the new device */ |
8ebdcc52 | 1403 | memset(&device_info, 0, sizeof(device_info)); |
692e084e | 1404 | device_info.ring_size = ring_size; |
e01ec219 | 1405 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
692e084e HZ |
1406 | ret = rndis_filter_device_add(dev, &device_info); |
1407 | if (ret != 0) { | |
1408 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
7eafd9b4 | 1409 | netvsc_free_netdev(net); |
2ddd5e5f | 1410 | hv_set_drvdata(dev, NULL); |
692e084e | 1411 | return ret; |
df2fff28 | 1412 | } |
692e084e HZ |
1413 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
1414 | ||
3d541ac5 | 1415 | nvdev = net_device_ctx->nvdev; |
5b54dac8 HZ |
1416 | netif_set_real_num_tx_queues(net, nvdev->num_chn); |
1417 | netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
5b54dac8 | 1418 | |
49eb9389 | 1419 | netvsc_init_settings(net); |
1420 | ||
a68f9614 HZ |
1421 | ret = register_netdev(net); |
1422 | if (ret != 0) { | |
1423 | pr_err("Unable to register netdev.\n"); | |
1424 | rndis_filter_device_remove(dev); | |
7eafd9b4 | 1425 | netvsc_free_netdev(net); |
a68f9614 HZ |
1426 | } |
1427 | ||
df2fff28 GKH |
1428 | return ret; |
1429 | } | |
1430 | ||
415b023a | 1431 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 1432 | { |
2ddd5e5f | 1433 | struct net_device *net; |
122a5f64 | 1434 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
1435 | struct netvsc_device *net_device; |
1436 | ||
3d541ac5 | 1437 | net = hv_get_drvdata(dev); |
df2fff28 | 1438 | |
df2fff28 | 1439 | if (net == NULL) { |
415b023a | 1440 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
1441 | return 0; |
1442 | } | |
1443 | ||
4d447c9a | 1444 | |
122a5f64 | 1445 | ndev_ctx = netdev_priv(net); |
3d541ac5 VK |
1446 | net_device = ndev_ctx->nvdev; |
1447 | ||
6da7225f VK |
1448 | /* Avoid racing with netvsc_change_mtu()/netvsc_set_channels() |
1449 | * removing the device. | |
1450 | */ | |
1451 | rtnl_lock(); | |
f580aec4 | 1452 | ndev_ctx->start_remove = true; |
6da7225f | 1453 | rtnl_unlock(); |
f580aec4 | 1454 | |
122a5f64 | 1455 | cancel_delayed_work_sync(&ndev_ctx->dwork); |
792df872 | 1456 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 1457 | |
df2fff28 | 1458 | /* Stop outbound asap */ |
0a282538 | 1459 | netif_tx_disable(net); |
df2fff28 GKH |
1460 | |
1461 | unregister_netdev(net); | |
1462 | ||
1463 | /* | |
1464 | * Call to the vsc driver to let it know that the device is being | |
1465 | * removed | |
1466 | */ | |
df06bcff | 1467 | rndis_filter_device_remove(dev); |
df2fff28 | 1468 | |
3d541ac5 VK |
1469 | hv_set_drvdata(dev, NULL); |
1470 | ||
7eafd9b4 | 1471 | netvsc_free_netdev(net); |
df06bcff | 1472 | return 0; |
df2fff28 GKH |
1473 | } |
1474 | ||
345c4cc3 | 1475 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 1476 | /* Network guid */ |
8f505944 | 1477 | { HV_NIC_GUID, }, |
c45cf2d4 | 1478 | { }, |
345c4cc3 S |
1479 | }; |
1480 | ||
1481 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
1482 | ||
f1542a66 | 1483 | /* The one and only one */ |
fde0ef9b | 1484 | static struct hv_driver netvsc_drv = { |
d31b20fc | 1485 | .name = KBUILD_MODNAME, |
345c4cc3 | 1486 | .id_table = id_table, |
fde0ef9b S |
1487 | .probe = netvsc_probe, |
1488 | .remove = netvsc_remove, | |
d4890970 | 1489 | }; |
f1542a66 | 1490 | |
84bf9cef KS |
1491 | |
1492 | /* | |
1493 | * On Hyper-V, every VF interface is matched with a corresponding | |
1494 | * synthetic interface. The synthetic interface is presented first | |
1495 | * to the guest. When the corresponding VF instance is registered, | |
1496 | * we will take care of switching the data path. | |
1497 | */ | |
1498 | static int netvsc_netdev_event(struct notifier_block *this, | |
1499 | unsigned long event, void *ptr) | |
1500 | { | |
1501 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); | |
1502 | ||
1503 | switch (event) { | |
1504 | case NETDEV_REGISTER: | |
1505 | return netvsc_register_vf(event_dev); | |
1506 | case NETDEV_UNREGISTER: | |
1507 | return netvsc_unregister_vf(event_dev); | |
1508 | case NETDEV_UP: | |
1509 | return netvsc_vf_up(event_dev); | |
1510 | case NETDEV_DOWN: | |
1511 | return netvsc_vf_down(event_dev); | |
1512 | default: | |
1513 | return NOTIFY_DONE; | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | static struct notifier_block netvsc_netdev_notifier = { | |
1518 | .notifier_call = netvsc_netdev_event, | |
1519 | }; | |
1520 | ||
a9869c94 | 1521 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 1522 | { |
84bf9cef | 1523 | unregister_netdevice_notifier(&netvsc_netdev_notifier); |
768fa219 | 1524 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
1525 | } |
1526 | ||
1fde28cf | 1527 | static int __init netvsc_drv_init(void) |
df2fff28 | 1528 | { |
84bf9cef KS |
1529 | int ret; |
1530 | ||
fa85a6c2 HZ |
1531 | if (ring_size < RING_SIZE_MIN) { |
1532 | ring_size = RING_SIZE_MIN; | |
1533 | pr_info("Increased ring_size to %d (min allowed)\n", | |
1534 | ring_size); | |
1535 | } | |
84bf9cef KS |
1536 | ret = vmbus_driver_register(&netvsc_drv); |
1537 | ||
1538 | if (ret) | |
1539 | return ret; | |
1540 | ||
1541 | register_netdevice_notifier(&netvsc_netdev_notifier); | |
1542 | return 0; | |
df2fff28 GKH |
1543 | } |
1544 | ||
26c14cc1 | 1545 | MODULE_LICENSE("GPL"); |
7880fc54 | 1546 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 1547 | |
1fde28cf | 1548 | module_init(netvsc_drv_init); |
a9869c94 | 1549 | module_exit(netvsc_drv_exit); |