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fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
adf8d3ff | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
fceaf24a HJ |
15 | * |
16 | * Authors: | |
d0e94d17 | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 18 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 19 | */ |
eb335bc4 HJ |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
fceaf24a | 22 | #include <linux/init.h> |
9079ce69 | 23 | #include <linux/atomic.h> |
fceaf24a HJ |
24 | #include <linux/module.h> |
25 | #include <linux/highmem.h> | |
26 | #include <linux/device.h> | |
fceaf24a | 27 | #include <linux/io.h> |
fceaf24a HJ |
28 | #include <linux/delay.h> |
29 | #include <linux/netdevice.h> | |
30 | #include <linux/inetdevice.h> | |
31 | #include <linux/etherdevice.h> | |
32 | #include <linux/skbuff.h> | |
c802db11 | 33 | #include <linux/if_vlan.h> |
fceaf24a | 34 | #include <linux/in.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
fceaf24a HJ |
36 | #include <net/arp.h> |
37 | #include <net/route.h> | |
38 | #include <net/sock.h> | |
39 | #include <net/pkt_sched.h> | |
3f335ea2 | 40 | |
5ca7252a | 41 | #include "hyperv_net.h" |
fceaf24a | 42 | |
fa85a6c2 | 43 | #define RING_SIZE_MIN 64 |
27a70af3 | 44 | #define LINKCHANGE_INT (2 * HZ) |
a060679c | 45 | #define NETVSC_HW_FEATURES (NETIF_F_RXCSUM | \ |
46 | NETIF_F_SG | \ | |
47 | NETIF_F_TSO | \ | |
48 | NETIF_F_TSO6 | \ | |
49 | NETIF_F_HW_CSUM) | |
99c8da0f | 50 | static int ring_size = 128; |
450d7a4b SH |
51 | module_param(ring_size, int, S_IRUGO); |
52 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); | |
fceaf24a | 53 | |
e01ec219 KS |
54 | static int max_num_vrss_chns = 8; |
55 | ||
3f300ff4 SX |
56 | static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | |
57 | NETIF_MSG_LINK | NETIF_MSG_IFUP | | |
58 | NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | | |
59 | NETIF_MSG_TX_ERR; | |
60 | ||
61 | static int debug = -1; | |
62 | module_param(debug, int, S_IRUGO); | |
63 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
64 | ||
d426b2e3 HZ |
65 | static void do_set_multicast(struct work_struct *w) |
66 | { | |
792df872 WM |
67 | struct net_device_context *ndevctx = |
68 | container_of(w, struct net_device_context, work); | |
0a1275ca VK |
69 | struct hv_device *device_obj = ndevctx->device_ctx; |
70 | struct net_device *ndev = hv_get_drvdata(device_obj); | |
71 | struct netvsc_device *nvdev = ndevctx->nvdev; | |
d426b2e3 HZ |
72 | struct rndis_device *rdev; |
73 | ||
0a1275ca | 74 | if (!nvdev) |
792df872 | 75 | return; |
d426b2e3 HZ |
76 | |
77 | rdev = nvdev->extension; | |
78 | if (rdev == NULL) | |
792df872 | 79 | return; |
d426b2e3 | 80 | |
0a1275ca | 81 | if (ndev->flags & IFF_PROMISC) |
d426b2e3 HZ |
82 | rndis_filter_set_packet_filter(rdev, |
83 | NDIS_PACKET_TYPE_PROMISCUOUS); | |
84 | else | |
85 | rndis_filter_set_packet_filter(rdev, | |
86 | NDIS_PACKET_TYPE_BROADCAST | | |
87 | NDIS_PACKET_TYPE_ALL_MULTICAST | | |
88 | NDIS_PACKET_TYPE_DIRECTED); | |
d426b2e3 HZ |
89 | } |
90 | ||
4e9bfefa | 91 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a | 92 | { |
792df872 | 93 | struct net_device_context *net_device_ctx = netdev_priv(net); |
d426b2e3 | 94 | |
792df872 | 95 | schedule_work(&net_device_ctx->work); |
fceaf24a HJ |
96 | } |
97 | ||
fceaf24a HJ |
98 | static int netvsc_open(struct net_device *net) |
99 | { | |
2f5fa6c8 | 100 | struct netvsc_device *nvdev = net_device_to_netvsc_device(net); |
891de74d | 101 | struct rndis_device *rdev; |
02fafbc6 | 102 | int ret = 0; |
fceaf24a | 103 | |
891de74d HZ |
104 | netif_carrier_off(net); |
105 | ||
d515d0ff | 106 | /* Open up the device */ |
2f5fa6c8 | 107 | ret = rndis_filter_open(nvdev); |
d515d0ff HZ |
108 | if (ret != 0) { |
109 | netdev_err(net, "unable to open device (ret %d).\n", ret); | |
110 | return ret; | |
fceaf24a HJ |
111 | } |
112 | ||
2de8530b | 113 | netif_tx_wake_all_queues(net); |
d515d0ff | 114 | |
891de74d HZ |
115 | rdev = nvdev->extension; |
116 | if (!rdev->link_state) | |
117 | netif_carrier_on(net); | |
118 | ||
fceaf24a HJ |
119 | return ret; |
120 | } | |
121 | ||
fceaf24a HJ |
122 | static int netvsc_close(struct net_device *net) |
123 | { | |
fceaf24a | 124 | struct net_device_context *net_device_ctx = netdev_priv(net); |
3d541ac5 | 125 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
02fafbc6 | 126 | int ret; |
2de8530b HZ |
127 | u32 aread, awrite, i, msec = 10, retry = 0, retry_max = 20; |
128 | struct vmbus_channel *chn; | |
fceaf24a | 129 | |
0a282538 | 130 | netif_tx_disable(net); |
fceaf24a | 131 | |
792df872 WM |
132 | /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */ |
133 | cancel_work_sync(&net_device_ctx->work); | |
2f5fa6c8 | 134 | ret = rndis_filter_close(nvdev); |
2de8530b | 135 | if (ret != 0) { |
eb335bc4 | 136 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
2de8530b HZ |
137 | return ret; |
138 | } | |
139 | ||
140 | /* Ensure pending bytes in ring are read */ | |
141 | while (true) { | |
142 | aread = 0; | |
143 | for (i = 0; i < nvdev->num_chn; i++) { | |
144 | chn = nvdev->chn_table[i]; | |
145 | if (!chn) | |
146 | continue; | |
147 | ||
148 | hv_get_ringbuffer_availbytes(&chn->inbound, &aread, | |
149 | &awrite); | |
150 | ||
151 | if (aread) | |
152 | break; | |
153 | ||
154 | hv_get_ringbuffer_availbytes(&chn->outbound, &aread, | |
155 | &awrite); | |
156 | ||
157 | if (aread) | |
158 | break; | |
159 | } | |
160 | ||
161 | retry++; | |
162 | if (retry > retry_max || aread == 0) | |
163 | break; | |
164 | ||
165 | msleep(msec); | |
166 | ||
167 | if (msec < 1000) | |
168 | msec *= 2; | |
169 | } | |
170 | ||
171 | if (aread) { | |
172 | netdev_err(net, "Ring buffer not empty after closing rndis\n"); | |
173 | ret = -ETIMEDOUT; | |
174 | } | |
fceaf24a | 175 | |
fceaf24a HJ |
176 | return ret; |
177 | } | |
178 | ||
8a00251a KS |
179 | static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size, |
180 | int pkt_type) | |
181 | { | |
182 | struct rndis_packet *rndis_pkt; | |
183 | struct rndis_per_packet_info *ppi; | |
184 | ||
185 | rndis_pkt = &msg->msg.pkt; | |
186 | rndis_pkt->data_offset += ppi_size; | |
187 | ||
188 | ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt + | |
189 | rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len); | |
190 | ||
191 | ppi->size = ppi_size; | |
192 | ppi->type = pkt_type; | |
193 | ppi->ppi_offset = sizeof(struct rndis_per_packet_info); | |
194 | ||
195 | rndis_pkt->per_pkt_info_len += ppi_size; | |
196 | ||
197 | return ppi; | |
198 | } | |
199 | ||
5b54dac8 HZ |
200 | static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, |
201 | void *accel_priv, select_queue_fallback_t fallback) | |
202 | { | |
203 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
3d541ac5 | 204 | struct netvsc_device *nvsc_dev = net_device_ctx->nvdev; |
5b54dac8 HZ |
205 | u32 hash; |
206 | u16 q_idx = 0; | |
207 | ||
208 | if (nvsc_dev == NULL || ndev->real_num_tx_queues <= 1) | |
209 | return 0; | |
210 | ||
757647e1 VK |
211 | hash = skb_get_hash(skb); |
212 | q_idx = nvsc_dev->send_table[hash % VRSS_SEND_TAB_SIZE] % | |
213 | ndev->real_num_tx_queues; | |
5b54dac8 | 214 | |
8b9fbe1a VK |
215 | if (!nvsc_dev->chn_table[q_idx]) |
216 | q_idx = 0; | |
217 | ||
5b54dac8 HZ |
218 | return q_idx; |
219 | } | |
220 | ||
54a7357f KS |
221 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
222 | struct hv_page_buffer *pb) | |
223 | { | |
224 | int j = 0; | |
225 | ||
226 | /* Deal with compund pages by ignoring unused part | |
227 | * of the page. | |
228 | */ | |
229 | page += (offset >> PAGE_SHIFT); | |
230 | offset &= ~PAGE_MASK; | |
231 | ||
232 | while (len > 0) { | |
233 | unsigned long bytes; | |
234 | ||
235 | bytes = PAGE_SIZE - offset; | |
236 | if (bytes > len) | |
237 | bytes = len; | |
238 | pb[j].pfn = page_to_pfn(page); | |
239 | pb[j].offset = offset; | |
240 | pb[j].len = bytes; | |
241 | ||
242 | offset += bytes; | |
243 | len -= bytes; | |
244 | ||
245 | if (offset == PAGE_SIZE && len) { | |
246 | page++; | |
247 | offset = 0; | |
248 | j++; | |
249 | } | |
250 | } | |
251 | ||
252 | return j + 1; | |
253 | } | |
254 | ||
8a00251a | 255 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
a9f2e2d6 KS |
256 | struct hv_netvsc_packet *packet, |
257 | struct hv_page_buffer **page_buf) | |
54a7357f | 258 | { |
a9f2e2d6 | 259 | struct hv_page_buffer *pb = *page_buf; |
54a7357f KS |
260 | u32 slots_used = 0; |
261 | char *data = skb->data; | |
262 | int frags = skb_shinfo(skb)->nr_frags; | |
263 | int i; | |
264 | ||
265 | /* The packet is laid out thus: | |
aa0a34be | 266 | * 1. hdr: RNDIS header and PPI |
54a7357f KS |
267 | * 2. skb linear data |
268 | * 3. skb fragment data | |
269 | */ | |
270 | if (hdr != NULL) | |
271 | slots_used += fill_pg_buf(virt_to_page(hdr), | |
272 | offset_in_page(hdr), | |
273 | len, &pb[slots_used]); | |
274 | ||
aa0a34be HZ |
275 | packet->rmsg_size = len; |
276 | packet->rmsg_pgcnt = slots_used; | |
277 | ||
54a7357f KS |
278 | slots_used += fill_pg_buf(virt_to_page(data), |
279 | offset_in_page(data), | |
280 | skb_headlen(skb), &pb[slots_used]); | |
281 | ||
282 | for (i = 0; i < frags; i++) { | |
283 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
284 | ||
285 | slots_used += fill_pg_buf(skb_frag_page(frag), | |
286 | frag->page_offset, | |
287 | skb_frag_size(frag), &pb[slots_used]); | |
288 | } | |
8a00251a | 289 | return slots_used; |
54a7357f KS |
290 | } |
291 | ||
292 | static int count_skb_frag_slots(struct sk_buff *skb) | |
293 | { | |
294 | int i, frags = skb_shinfo(skb)->nr_frags; | |
295 | int pages = 0; | |
296 | ||
297 | for (i = 0; i < frags; i++) { | |
298 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
299 | unsigned long size = skb_frag_size(frag); | |
300 | unsigned long offset = frag->page_offset; | |
301 | ||
302 | /* Skip unused frames from start of page */ | |
303 | offset &= ~PAGE_MASK; | |
304 | pages += PFN_UP(offset + size); | |
305 | } | |
306 | return pages; | |
307 | } | |
308 | ||
309 | static int netvsc_get_slots(struct sk_buff *skb) | |
310 | { | |
311 | char *data = skb->data; | |
312 | unsigned int offset = offset_in_page(data); | |
313 | unsigned int len = skb_headlen(skb); | |
314 | int slots; | |
315 | int frag_slots; | |
316 | ||
317 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); | |
318 | frag_slots = count_skb_frag_slots(skb); | |
319 | return slots + frag_slots; | |
320 | } | |
321 | ||
08cd04bf KS |
322 | static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off) |
323 | { | |
324 | u32 ret_val = TRANSPORT_INFO_NOT_IP; | |
325 | ||
326 | if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) && | |
327 | (eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) { | |
328 | goto not_ip; | |
329 | } | |
330 | ||
331 | *trans_off = skb_transport_offset(skb); | |
332 | ||
333 | if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) { | |
334 | struct iphdr *iphdr = ip_hdr(skb); | |
335 | ||
336 | if (iphdr->protocol == IPPROTO_TCP) | |
337 | ret_val = TRANSPORT_INFO_IPV4_TCP; | |
338 | else if (iphdr->protocol == IPPROTO_UDP) | |
339 | ret_val = TRANSPORT_INFO_IPV4_UDP; | |
340 | } else { | |
341 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) | |
342 | ret_val = TRANSPORT_INFO_IPV6_TCP; | |
343 | else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) | |
344 | ret_val = TRANSPORT_INFO_IPV6_UDP; | |
345 | } | |
346 | ||
347 | not_ip: | |
348 | return ret_val; | |
349 | } | |
350 | ||
02fafbc6 | 351 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 352 | { |
fceaf24a | 353 | struct net_device_context *net_device_ctx = netdev_priv(net); |
981a1bd8 | 354 | struct hv_netvsc_packet *packet = NULL; |
02fafbc6 | 355 | int ret; |
8a00251a KS |
356 | unsigned int num_data_pgs; |
357 | struct rndis_message *rndis_msg; | |
358 | struct rndis_packet *rndis_pkt; | |
359 | u32 rndis_msg_size; | |
8a00251a | 360 | struct rndis_per_packet_info *ppi; |
08cd04bf KS |
361 | struct ndis_tcp_ip_checksum_info *csum_info; |
362 | int hdr_offset; | |
363 | u32 net_trans_info; | |
307f0995 | 364 | u32 hash; |
e88f7e07 | 365 | u32 skb_length; |
b08cc791 | 366 | struct hv_page_buffer page_buf[MAX_PAGE_BUFFER_COUNT]; |
a9f2e2d6 | 367 | struct hv_page_buffer *pb = page_buf; |
fceaf24a | 368 | |
54a7357f KS |
369 | /* We will atmost need two pages to describe the rndis |
370 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number | |
e88f7e07 VK |
371 | * of pages in a single packet. If skb is scattered around |
372 | * more pages we try linearizing it. | |
54a7357f | 373 | */ |
e88f7e07 | 374 | |
e88f7e07 | 375 | skb_length = skb->len; |
8a00251a | 376 | num_data_pgs = netvsc_get_slots(skb) + 2; |
0ab05141 SH |
377 | |
378 | if (unlikely(num_data_pgs > MAX_PAGE_BUFFER_COUNT)) { | |
4323b47c SH |
379 | ++net_device_ctx->eth_stats.tx_scattered; |
380 | ||
381 | if (skb_linearize(skb)) | |
382 | goto no_memory; | |
0ab05141 SH |
383 | |
384 | num_data_pgs = netvsc_get_slots(skb) + 2; | |
385 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { | |
4323b47c | 386 | ++net_device_ctx->eth_stats.tx_too_big; |
0ab05141 SH |
387 | goto drop; |
388 | } | |
54a7357f | 389 | } |
fceaf24a | 390 | |
c0eb4540 KS |
391 | /* |
392 | * Place the rndis header in the skb head room and | |
393 | * the skb->cb will be used for hv_netvsc_packet | |
394 | * structure. | |
395 | */ | |
396 | ret = skb_cow_head(skb, RNDIS_AND_PPI_SIZE); | |
4323b47c SH |
397 | if (ret) |
398 | goto no_memory; | |
399 | ||
c0eb4540 KS |
400 | /* Use the skb control buffer for building up the packet */ |
401 | BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) > | |
402 | FIELD_SIZEOF(struct sk_buff, cb)); | |
403 | packet = (struct hv_netvsc_packet *)skb->cb; | |
fceaf24a | 404 | |
5b54dac8 HZ |
405 | packet->q_idx = skb_get_queue_mapping(skb); |
406 | ||
4d447c9a | 407 | packet->total_data_buflen = skb->len; |
fceaf24a | 408 | |
c0eb4540 | 409 | rndis_msg = (struct rndis_message *)skb->head; |
b08cc791 | 410 | |
24476760 | 411 | memset(rndis_msg, 0, RNDIS_AND_PPI_SIZE); |
fceaf24a | 412 | |
8a00251a | 413 | /* Add the rndis header */ |
8a00251a KS |
414 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; |
415 | rndis_msg->msg_len = packet->total_data_buflen; | |
416 | rndis_pkt = &rndis_msg->msg.pkt; | |
417 | rndis_pkt->data_offset = sizeof(struct rndis_packet); | |
418 | rndis_pkt->data_len = packet->total_data_buflen; | |
419 | rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); | |
420 | ||
421 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); | |
422 | ||
307f0995 HZ |
423 | hash = skb_get_hash_raw(skb); |
424 | if (hash != 0 && net->real_num_tx_queues > 1) { | |
425 | rndis_msg_size += NDIS_HASH_PPI_SIZE; | |
426 | ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE, | |
427 | NBL_HASH_VALUE); | |
428 | *(u32 *)((void *)ppi + ppi->ppi_offset) = hash; | |
429 | } | |
430 | ||
0ab05141 | 431 | if (skb_vlan_tag_present(skb)) { |
8a00251a KS |
432 | struct ndis_pkt_8021q_info *vlan; |
433 | ||
434 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; | |
435 | ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, | |
436 | IEEE_8021Q_INFO); | |
437 | vlan = (struct ndis_pkt_8021q_info *)((void *)ppi + | |
438 | ppi->ppi_offset); | |
760d1e36 KS |
439 | vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK; |
440 | vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >> | |
8a00251a KS |
441 | VLAN_PRIO_SHIFT; |
442 | } | |
443 | ||
08cd04bf | 444 | net_trans_info = get_net_transport_info(skb, &hdr_offset); |
08cd04bf KS |
445 | |
446 | /* | |
447 | * Setup the sendside checksum offload only if this is not a | |
448 | * GSO packet. | |
449 | */ | |
0ab05141 SH |
450 | if (skb_is_gso(skb)) { |
451 | struct ndis_tcp_lso_info *lso_info; | |
452 | ||
453 | rndis_msg_size += NDIS_LSO_PPI_SIZE; | |
454 | ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, | |
455 | TCP_LARGESEND_PKTINFO); | |
456 | ||
457 | lso_info = (struct ndis_tcp_lso_info *)((void *)ppi + | |
458 | ppi->ppi_offset); | |
459 | ||
460 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; | |
461 | if (net_trans_info & (INFO_IPV4 << 16)) { | |
462 | lso_info->lso_v2_transmit.ip_version = | |
463 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; | |
464 | ip_hdr(skb)->tot_len = 0; | |
465 | ip_hdr(skb)->check = 0; | |
466 | tcp_hdr(skb)->check = | |
467 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
468 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
469 | } else { | |
470 | lso_info->lso_v2_transmit.ip_version = | |
471 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; | |
472 | ipv6_hdr(skb)->payload_len = 0; | |
473 | tcp_hdr(skb)->check = | |
474 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
475 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
476 | } | |
477 | lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset; | |
478 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; | |
ad19bc8a | 479 | } else if (skb->ip_summed == CHECKSUM_PARTIAL) { |
480 | if (net_trans_info & INFO_TCP) { | |
481 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; | |
482 | ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, | |
483 | TCPIP_CHKSUM_PKTINFO); | |
484 | ||
485 | csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + | |
486 | ppi->ppi_offset); | |
487 | ||
488 | if (net_trans_info & (INFO_IPV4 << 16)) | |
489 | csum_info->transmit.is_ipv4 = 1; | |
490 | else | |
491 | csum_info->transmit.is_ipv6 = 1; | |
492 | ||
493 | csum_info->transmit.tcp_checksum = 1; | |
494 | csum_info->transmit.tcp_header_offset = hdr_offset; | |
495 | } else { | |
496 | /* UDP checksum (and other) offload is not supported. */ | |
497 | if (skb_checksum_help(skb)) | |
498 | goto drop; | |
499 | } | |
08cd04bf KS |
500 | } |
501 | ||
8a00251a KS |
502 | /* Start filling in the page buffers with the rndis hdr */ |
503 | rndis_msg->msg_len += rndis_msg_size; | |
942396b0 | 504 | packet->total_data_buflen = rndis_msg->msg_len; |
8a00251a | 505 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, |
a9f2e2d6 | 506 | skb, packet, &pb); |
8a00251a | 507 | |
76d13b56 | 508 | /* timestamp packet in software */ |
509 | skb_tx_timestamp(skb); | |
3a3d9a0a KS |
510 | ret = netvsc_send(net_device_ctx->device_ctx, packet, |
511 | rndis_msg, &pb, skb); | |
0ab05141 | 512 | if (likely(ret == 0)) { |
4323b47c SH |
513 | struct netvsc_stats *tx_stats = this_cpu_ptr(net_device_ctx->tx_stats); |
514 | ||
4b02b58b | 515 | u64_stats_update_begin(&tx_stats->syncp); |
7eafd9b4 | 516 | tx_stats->packets++; |
517 | tx_stats->bytes += skb_length; | |
4b02b58b | 518 | u64_stats_update_end(&tx_stats->syncp); |
0ab05141 | 519 | return NETDEV_TX_OK; |
fceaf24a | 520 | } |
4323b47c SH |
521 | |
522 | if (ret == -EAGAIN) { | |
523 | ++net_device_ctx->eth_stats.tx_busy; | |
0ab05141 | 524 | return NETDEV_TX_BUSY; |
4323b47c SH |
525 | } |
526 | ||
527 | if (ret == -ENOSPC) | |
528 | ++net_device_ctx->eth_stats.tx_no_space; | |
0ab05141 SH |
529 | |
530 | drop: | |
531 | dev_kfree_skb_any(skb); | |
532 | net->stats.tx_dropped++; | |
fceaf24a | 533 | |
0ab05141 | 534 | return NETDEV_TX_OK; |
4323b47c SH |
535 | |
536 | no_memory: | |
537 | ++net_device_ctx->eth_stats.tx_no_memory; | |
538 | goto drop; | |
fceaf24a HJ |
539 | } |
540 | ||
3e189519 | 541 | /* |
02fafbc6 GKH |
542 | * netvsc_linkstatus_callback - Link up/down notification |
543 | */ | |
90ef117a | 544 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
3a494e71 | 545 | struct rndis_message *resp) |
fceaf24a | 546 | { |
3a494e71 | 547 | struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
2ddd5e5f | 548 | struct net_device *net; |
c996edcf | 549 | struct net_device_context *ndev_ctx; |
27a70af3 VK |
550 | struct netvsc_reconfig *event; |
551 | unsigned long flags; | |
891de74d | 552 | |
7f5d5af0 HZ |
553 | net = hv_get_drvdata(device_obj); |
554 | ||
555 | if (!net) | |
556 | return; | |
557 | ||
558 | ndev_ctx = netdev_priv(net); | |
559 | ||
560 | /* Update the physical link speed when changing to another vSwitch */ | |
561 | if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) { | |
562 | u32 speed; | |
563 | ||
564 | speed = *(u32 *)((void *)indicate + indicate-> | |
565 | status_buf_offset) / 10000; | |
566 | ndev_ctx->speed = speed; | |
567 | return; | |
568 | } | |
569 | ||
570 | /* Handle these link change statuses below */ | |
27a70af3 VK |
571 | if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE && |
572 | indicate->status != RNDIS_STATUS_MEDIA_CONNECT && | |
573 | indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT) | |
3a494e71 | 574 | return; |
891de74d | 575 | |
7f5d5af0 | 576 | if (net->reg_state != NETREG_REGISTERED) |
fceaf24a | 577 | return; |
fceaf24a | 578 | |
27a70af3 VK |
579 | event = kzalloc(sizeof(*event), GFP_ATOMIC); |
580 | if (!event) | |
581 | return; | |
582 | event->event = indicate->status; | |
583 | ||
584 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
585 | list_add_tail(&event->list, &ndev_ctx->reconfig_events); | |
586 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
587 | ||
588 | schedule_delayed_work(&ndev_ctx->dwork, 0); | |
fceaf24a HJ |
589 | } |
590 | ||
84bf9cef | 591 | static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net, |
e3d605ed | 592 | struct hv_netvsc_packet *packet, |
25b85ee8 | 593 | struct ndis_tcp_ip_checksum_info *csum_info, |
84bf9cef | 594 | void *data, u16 vlan_tci) |
fceaf24a | 595 | { |
fceaf24a | 596 | struct sk_buff *skb; |
fceaf24a | 597 | |
72a2f5bd | 598 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
84bf9cef KS |
599 | if (!skb) |
600 | return skb; | |
fceaf24a | 601 | |
02fafbc6 GKH |
602 | /* |
603 | * Copy to skb. This copy is needed here since the memory pointed by | |
604 | * hv_netvsc_packet cannot be deallocated | |
605 | */ | |
84bf9cef KS |
606 | memcpy(skb_put(skb, packet->total_data_buflen), data, |
607 | packet->total_data_buflen); | |
fceaf24a HJ |
608 | |
609 | skb->protocol = eth_type_trans(skb, net); | |
e3d605ed KS |
610 | if (csum_info) { |
611 | /* We only look at the IP checksum here. | |
612 | * Should we be dropping the packet if checksum | |
613 | * failed? How do we deal with other checksums - TCP/UDP? | |
614 | */ | |
615 | if (csum_info->receive.ip_checksum_succeeded) | |
616 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
617 | else | |
618 | skb->ip_summed = CHECKSUM_NONE; | |
619 | } | |
620 | ||
760d1e36 | 621 | if (vlan_tci & VLAN_TAG_PRESENT) |
93725cbd | 622 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
760d1e36 | 623 | vlan_tci); |
fceaf24a | 624 | |
84bf9cef KS |
625 | return skb; |
626 | } | |
627 | ||
628 | /* | |
629 | * netvsc_recv_callback - Callback when we receive a packet from the | |
630 | * "wire" on the specified device. | |
631 | */ | |
632 | int netvsc_recv_callback(struct hv_device *device_obj, | |
633 | struct hv_netvsc_packet *packet, | |
634 | void **data, | |
635 | struct ndis_tcp_ip_checksum_info *csum_info, | |
636 | struct vmbus_channel *channel, | |
637 | u16 vlan_tci) | |
638 | { | |
3d541ac5 VK |
639 | struct net_device *net = hv_get_drvdata(device_obj); |
640 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
f207c10d | 641 | struct net_device *vf_netdev; |
84bf9cef | 642 | struct sk_buff *skb; |
84bf9cef | 643 | struct netvsc_stats *rx_stats; |
84bf9cef | 644 | |
9cbcc428 | 645 | if (net->reg_state != NETREG_REGISTERED) |
84bf9cef KS |
646 | return NVSP_STAT_FAIL; |
647 | ||
9cbcc428 SH |
648 | /* |
649 | * If necessary, inject this packet into the VF interface. | |
650 | * On Hyper-V, multicast and brodcast packets are only delivered | |
651 | * to the synthetic interface (after subjecting these to | |
652 | * policy filters on the host). Deliver these via the VF | |
653 | * interface in the guest. | |
654 | */ | |
f207c10d | 655 | vf_netdev = rcu_dereference(net_device_ctx->vf_netdev); |
9cbcc428 SH |
656 | if (vf_netdev && (vf_netdev->flags & IFF_UP)) |
657 | net = vf_netdev; | |
84bf9cef KS |
658 | |
659 | /* Allocate a skb - TODO direct I/O to pages? */ | |
660 | skb = netvsc_alloc_recv_skb(net, packet, csum_info, *data, vlan_tci); | |
661 | if (unlikely(!skb)) { | |
662 | ++net->stats.rx_dropped; | |
663 | return NVSP_STAT_FAIL; | |
664 | } | |
5b54dac8 | 665 | |
9cbcc428 SH |
666 | if (net != vf_netdev) |
667 | skb_record_rx_queue(skb, | |
668 | channel->offermsg.offer.sub_channel_index); | |
669 | ||
670 | /* | |
671 | * Even if injecting the packet, record the statistics | |
672 | * on the synthetic device because modifying the VF device | |
673 | * statistics will not work correctly. | |
674 | */ | |
675 | rx_stats = this_cpu_ptr(net_device_ctx->rx_stats); | |
4b02b58b | 676 | u64_stats_update_begin(&rx_stats->syncp); |
7eafd9b4 | 677 | rx_stats->packets++; |
678 | rx_stats->bytes += packet->total_data_buflen; | |
f7ad75b7 SH |
679 | |
680 | if (skb->pkt_type == PACKET_BROADCAST) | |
681 | ++rx_stats->broadcast; | |
682 | else if (skb->pkt_type == PACKET_MULTICAST) | |
683 | ++rx_stats->multicast; | |
4b02b58b | 684 | u64_stats_update_end(&rx_stats->syncp); |
9495c282 | 685 | |
02fafbc6 GKH |
686 | /* |
687 | * Pass the skb back up. Network stack will deallocate the skb when it | |
9495c282 SH |
688 | * is done. |
689 | * TODO - use NAPI? | |
02fafbc6 | 690 | */ |
9495c282 | 691 | netif_rx(skb); |
fceaf24a | 692 | |
fceaf24a HJ |
693 | return 0; |
694 | } | |
695 | ||
f82f4ad7 SH |
696 | static void netvsc_get_drvinfo(struct net_device *net, |
697 | struct ethtool_drvinfo *info) | |
698 | { | |
e3f74b84 SH |
699 | struct net_device_context *net_device_ctx = netdev_priv(net); |
700 | struct hv_device *dev = net_device_ctx->device_ctx; | |
701 | ||
7826d43f | 702 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 703 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
e3f74b84 | 704 | strlcpy(info->bus_info, vmbus_dev_name(dev), sizeof(info->bus_info)); |
f82f4ad7 SH |
705 | } |
706 | ||
59995370 AS |
707 | static void netvsc_get_channels(struct net_device *net, |
708 | struct ethtool_channels *channel) | |
709 | { | |
710 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
3d541ac5 | 711 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
59995370 AS |
712 | |
713 | if (nvdev) { | |
714 | channel->max_combined = nvdev->max_chn; | |
715 | channel->combined_count = nvdev->num_chn; | |
716 | } | |
717 | } | |
718 | ||
b5960e6e AS |
719 | static int netvsc_set_channels(struct net_device *net, |
720 | struct ethtool_channels *channels) | |
721 | { | |
722 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
723 | struct hv_device *dev = net_device_ctx->device_ctx; | |
3d541ac5 | 724 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
b5960e6e | 725 | struct netvsc_device_info device_info; |
954591b9 AS |
726 | u32 num_chn; |
727 | u32 max_chn; | |
b5960e6e AS |
728 | int ret = 0; |
729 | bool recovering = false; | |
730 | ||
6da7225f | 731 | if (net_device_ctx->start_remove || !nvdev || nvdev->destroy) |
b5960e6e AS |
732 | return -ENODEV; |
733 | ||
954591b9 AS |
734 | num_chn = nvdev->num_chn; |
735 | max_chn = min_t(u32, nvdev->max_chn, num_online_cpus()); | |
736 | ||
b5960e6e AS |
737 | if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) { |
738 | pr_info("vRSS unsupported before NVSP Version 5\n"); | |
739 | return -EINVAL; | |
740 | } | |
741 | ||
742 | /* We do not support rx, tx, or other */ | |
743 | if (!channels || | |
744 | channels->rx_count || | |
745 | channels->tx_count || | |
746 | channels->other_count || | |
747 | (channels->combined_count < 1)) | |
748 | return -EINVAL; | |
749 | ||
750 | if (channels->combined_count > max_chn) { | |
751 | pr_info("combined channels too high, using %d\n", max_chn); | |
752 | channels->combined_count = max_chn; | |
753 | } | |
754 | ||
755 | ret = netvsc_close(net); | |
756 | if (ret) | |
757 | goto out; | |
758 | ||
759 | do_set: | |
f580aec4 | 760 | net_device_ctx->start_remove = true; |
b5960e6e AS |
761 | rndis_filter_device_remove(dev); |
762 | ||
763 | nvdev->num_chn = channels->combined_count; | |
764 | ||
b5960e6e AS |
765 | memset(&device_info, 0, sizeof(device_info)); |
766 | device_info.num_chn = nvdev->num_chn; /* passed to RNDIS */ | |
767 | device_info.ring_size = ring_size; | |
768 | device_info.max_num_vrss_chns = max_num_vrss_chns; | |
769 | ||
770 | ret = rndis_filter_device_add(dev, &device_info); | |
771 | if (ret) { | |
772 | if (recovering) { | |
773 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
774 | return ret; | |
775 | } | |
776 | goto recover; | |
777 | } | |
778 | ||
3d541ac5 | 779 | nvdev = net_device_ctx->nvdev; |
b5960e6e AS |
780 | |
781 | ret = netif_set_real_num_tx_queues(net, nvdev->num_chn); | |
782 | if (ret) { | |
783 | if (recovering) { | |
784 | netdev_err(net, "could not set tx queue count (ret %d)\n", ret); | |
785 | return ret; | |
786 | } | |
787 | goto recover; | |
788 | } | |
789 | ||
790 | ret = netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
791 | if (ret) { | |
792 | if (recovering) { | |
793 | netdev_err(net, "could not set rx queue count (ret %d)\n", ret); | |
794 | return ret; | |
795 | } | |
796 | goto recover; | |
797 | } | |
798 | ||
799 | out: | |
800 | netvsc_open(net); | |
f580aec4 | 801 | net_device_ctx->start_remove = false; |
1bdcec8a VK |
802 | /* We may have missed link change notifications */ |
803 | schedule_delayed_work(&net_device_ctx->dwork, 0); | |
b5960e6e AS |
804 | |
805 | return ret; | |
806 | ||
807 | recover: | |
808 | /* If the above failed, we attempt to recover through the same | |
809 | * process but with the original number of channels. | |
810 | */ | |
811 | netdev_err(net, "could not set channels, recovering\n"); | |
812 | recovering = true; | |
813 | channels->combined_count = num_chn; | |
814 | goto do_set; | |
815 | } | |
816 | ||
49eb9389 | 817 | static bool netvsc_validate_ethtool_ss_cmd(const struct ethtool_cmd *cmd) |
818 | { | |
819 | struct ethtool_cmd diff1 = *cmd; | |
820 | struct ethtool_cmd diff2 = {}; | |
821 | ||
822 | ethtool_cmd_speed_set(&diff1, 0); | |
823 | diff1.duplex = 0; | |
824 | /* advertising and cmd are usually set */ | |
825 | diff1.advertising = 0; | |
826 | diff1.cmd = 0; | |
827 | /* We set port to PORT_OTHER */ | |
828 | diff2.port = PORT_OTHER; | |
829 | ||
830 | return !memcmp(&diff1, &diff2, sizeof(diff1)); | |
831 | } | |
832 | ||
833 | static void netvsc_init_settings(struct net_device *dev) | |
834 | { | |
835 | struct net_device_context *ndc = netdev_priv(dev); | |
836 | ||
837 | ndc->speed = SPEED_UNKNOWN; | |
838 | ndc->duplex = DUPLEX_UNKNOWN; | |
839 | } | |
840 | ||
841 | static int netvsc_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
842 | { | |
843 | struct net_device_context *ndc = netdev_priv(dev); | |
844 | ||
845 | ethtool_cmd_speed_set(cmd, ndc->speed); | |
846 | cmd->duplex = ndc->duplex; | |
847 | cmd->port = PORT_OTHER; | |
848 | ||
849 | return 0; | |
850 | } | |
851 | ||
852 | static int netvsc_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
853 | { | |
854 | struct net_device_context *ndc = netdev_priv(dev); | |
855 | u32 speed; | |
856 | ||
857 | speed = ethtool_cmd_speed(cmd); | |
858 | if (!ethtool_validate_speed(speed) || | |
859 | !ethtool_validate_duplex(cmd->duplex) || | |
860 | !netvsc_validate_ethtool_ss_cmd(cmd)) | |
861 | return -EINVAL; | |
862 | ||
863 | ndc->speed = speed; | |
864 | ndc->duplex = cmd->duplex; | |
865 | ||
866 | return 0; | |
867 | } | |
868 | ||
4d447c9a HZ |
869 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
870 | { | |
871 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
3d541ac5 VK |
872 | struct netvsc_device *nvdev = ndevctx->nvdev; |
873 | struct hv_device *hdev = ndevctx->device_ctx; | |
4d447c9a HZ |
874 | struct netvsc_device_info device_info; |
875 | int limit = ETH_DATA_LEN; | |
d212b463 | 876 | u32 num_chn; |
2de8530b | 877 | int ret = 0; |
4d447c9a | 878 | |
6da7225f | 879 | if (ndevctx->start_remove || !nvdev || nvdev->destroy) |
4d447c9a HZ |
880 | return -ENODEV; |
881 | ||
a1eabb01 | 882 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) |
4d3c9d37 | 883 | limit = NETVSC_MTU - ETH_HLEN; |
4d447c9a | 884 | |
f9cbce34 | 885 | if (mtu < NETVSC_MTU_MIN || mtu > limit) |
4d447c9a HZ |
886 | return -EINVAL; |
887 | ||
2de8530b HZ |
888 | ret = netvsc_close(ndev); |
889 | if (ret) | |
890 | goto out; | |
891 | ||
d212b463 HZ |
892 | num_chn = nvdev->num_chn; |
893 | ||
f580aec4 | 894 | ndevctx->start_remove = true; |
4d447c9a HZ |
895 | rndis_filter_device_remove(hdev); |
896 | ||
897 | ndev->mtu = mtu; | |
898 | ||
8ebdcc52 | 899 | memset(&device_info, 0, sizeof(device_info)); |
4d447c9a | 900 | device_info.ring_size = ring_size; |
d212b463 | 901 | device_info.num_chn = num_chn; |
e01ec219 | 902 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
4d447c9a | 903 | rndis_filter_device_add(hdev, &device_info); |
4d447c9a | 904 | |
2de8530b HZ |
905 | out: |
906 | netvsc_open(ndev); | |
f580aec4 | 907 | ndevctx->start_remove = false; |
2de8530b | 908 | |
1bdcec8a VK |
909 | /* We may have missed link change notifications */ |
910 | schedule_delayed_work(&ndevctx->dwork, 0); | |
911 | ||
2de8530b | 912 | return ret; |
4d447c9a HZ |
913 | } |
914 | ||
7eafd9b4 | 915 | static struct rtnl_link_stats64 *netvsc_get_stats64(struct net_device *net, |
916 | struct rtnl_link_stats64 *t) | |
917 | { | |
918 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
919 | int cpu; | |
920 | ||
921 | for_each_possible_cpu(cpu) { | |
922 | struct netvsc_stats *tx_stats = per_cpu_ptr(ndev_ctx->tx_stats, | |
923 | cpu); | |
924 | struct netvsc_stats *rx_stats = per_cpu_ptr(ndev_ctx->rx_stats, | |
925 | cpu); | |
f7ad75b7 | 926 | u64 tx_packets, tx_bytes, rx_packets, rx_bytes, rx_multicast; |
7eafd9b4 | 927 | unsigned int start; |
928 | ||
929 | do { | |
4b02b58b | 930 | start = u64_stats_fetch_begin_irq(&tx_stats->syncp); |
7eafd9b4 | 931 | tx_packets = tx_stats->packets; |
932 | tx_bytes = tx_stats->bytes; | |
4b02b58b | 933 | } while (u64_stats_fetch_retry_irq(&tx_stats->syncp, start)); |
7eafd9b4 | 934 | |
935 | do { | |
4b02b58b | 936 | start = u64_stats_fetch_begin_irq(&rx_stats->syncp); |
7eafd9b4 | 937 | rx_packets = rx_stats->packets; |
938 | rx_bytes = rx_stats->bytes; | |
f7ad75b7 | 939 | rx_multicast = rx_stats->multicast + rx_stats->broadcast; |
4b02b58b | 940 | } while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start)); |
7eafd9b4 | 941 | |
942 | t->tx_bytes += tx_bytes; | |
943 | t->tx_packets += tx_packets; | |
944 | t->rx_bytes += rx_bytes; | |
945 | t->rx_packets += rx_packets; | |
f7ad75b7 | 946 | t->multicast += rx_multicast; |
7eafd9b4 | 947 | } |
948 | ||
949 | t->tx_dropped = net->stats.tx_dropped; | |
950 | t->tx_errors = net->stats.tx_dropped; | |
951 | ||
952 | t->rx_dropped = net->stats.rx_dropped; | |
953 | t->rx_errors = net->stats.rx_errors; | |
954 | ||
955 | return t; | |
956 | } | |
1ce09e89 HZ |
957 | |
958 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
959 | { | |
1ce09e89 | 960 | struct sockaddr *addr = p; |
9a4c831e | 961 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
962 | unsigned char save_aatype; |
963 | int err; | |
964 | ||
965 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
966 | save_aatype = ndev->addr_assign_type; | |
967 | ||
968 | err = eth_mac_addr(ndev, p); | |
969 | if (err != 0) | |
970 | return err; | |
971 | ||
e834da9a | 972 | err = rndis_filter_set_device_mac(ndev, addr->sa_data); |
1ce09e89 HZ |
973 | if (err != 0) { |
974 | /* roll back to saved MAC */ | |
975 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
976 | ndev->addr_assign_type = save_aatype; | |
977 | } | |
978 | ||
979 | return err; | |
980 | } | |
981 | ||
4323b47c SH |
982 | static const struct { |
983 | char name[ETH_GSTRING_LEN]; | |
984 | u16 offset; | |
985 | } netvsc_stats[] = { | |
986 | { "tx_scattered", offsetof(struct netvsc_ethtool_stats, tx_scattered) }, | |
987 | { "tx_no_memory", offsetof(struct netvsc_ethtool_stats, tx_no_memory) }, | |
988 | { "tx_no_space", offsetof(struct netvsc_ethtool_stats, tx_no_space) }, | |
989 | { "tx_too_big", offsetof(struct netvsc_ethtool_stats, tx_too_big) }, | |
990 | { "tx_busy", offsetof(struct netvsc_ethtool_stats, tx_busy) }, | |
991 | }; | |
992 | ||
993 | static int netvsc_get_sset_count(struct net_device *dev, int string_set) | |
994 | { | |
995 | switch (string_set) { | |
996 | case ETH_SS_STATS: | |
997 | return ARRAY_SIZE(netvsc_stats); | |
998 | default: | |
999 | return -EINVAL; | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | static void netvsc_get_ethtool_stats(struct net_device *dev, | |
1004 | struct ethtool_stats *stats, u64 *data) | |
1005 | { | |
1006 | struct net_device_context *ndc = netdev_priv(dev); | |
1007 | const void *nds = &ndc->eth_stats; | |
1008 | int i; | |
1009 | ||
1010 | for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) | |
1011 | data[i] = *(unsigned long *)(nds + netvsc_stats[i].offset); | |
1012 | } | |
1013 | ||
1014 | static void netvsc_get_strings(struct net_device *dev, u32 stringset, u8 *data) | |
1015 | { | |
1016 | int i; | |
1017 | ||
1018 | switch (stringset) { | |
1019 | case ETH_SS_STATS: | |
1020 | for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) | |
1021 | memcpy(data + i * ETH_GSTRING_LEN, | |
1022 | netvsc_stats[i].name, ETH_GSTRING_LEN); | |
1023 | break; | |
1024 | } | |
1025 | } | |
1026 | ||
316158fe RW |
1027 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1028 | static void netvsc_poll_controller(struct net_device *net) | |
1029 | { | |
1030 | /* As netvsc_start_xmit() works synchronous we don't have to | |
1031 | * trigger anything here. | |
1032 | */ | |
1033 | } | |
1034 | #endif | |
1ce09e89 | 1035 | |
f82f4ad7 SH |
1036 | static const struct ethtool_ops ethtool_ops = { |
1037 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 | 1038 | .get_link = ethtool_op_get_link, |
4323b47c SH |
1039 | .get_ethtool_stats = netvsc_get_ethtool_stats, |
1040 | .get_sset_count = netvsc_get_sset_count, | |
1041 | .get_strings = netvsc_get_strings, | |
59995370 | 1042 | .get_channels = netvsc_get_channels, |
b5960e6e | 1043 | .set_channels = netvsc_set_channels, |
76d13b56 | 1044 | .get_ts_info = ethtool_op_get_ts_info, |
49eb9389 | 1045 | .get_settings = netvsc_get_settings, |
1046 | .set_settings = netvsc_set_settings, | |
f82f4ad7 SH |
1047 | }; |
1048 | ||
df2fff28 GKH |
1049 | static const struct net_device_ops device_ops = { |
1050 | .ndo_open = netvsc_open, | |
1051 | .ndo_stop = netvsc_close, | |
1052 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 1053 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 1054 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 1055 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 1056 | .ndo_set_mac_address = netvsc_set_mac_addr, |
5b54dac8 | 1057 | .ndo_select_queue = netvsc_select_queue, |
7eafd9b4 | 1058 | .ndo_get_stats64 = netvsc_get_stats64, |
316158fe RW |
1059 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1060 | .ndo_poll_controller = netvsc_poll_controller, | |
1061 | #endif | |
df2fff28 GKH |
1062 | }; |
1063 | ||
c996edcf | 1064 | /* |
27a70af3 VK |
1065 | * Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link |
1066 | * down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is | |
1067 | * present send GARP packet to network peers with netif_notify_peers(). | |
c996edcf | 1068 | */ |
891de74d | 1069 | static void netvsc_link_change(struct work_struct *w) |
c996edcf | 1070 | { |
0a1275ca VK |
1071 | struct net_device_context *ndev_ctx = |
1072 | container_of(w, struct net_device_context, dwork.work); | |
1073 | struct hv_device *device_obj = ndev_ctx->device_ctx; | |
1074 | struct net_device *net = hv_get_drvdata(device_obj); | |
2ddd5e5f | 1075 | struct netvsc_device *net_device; |
891de74d | 1076 | struct rndis_device *rdev; |
27a70af3 VK |
1077 | struct netvsc_reconfig *event = NULL; |
1078 | bool notify = false, reschedule = false; | |
1079 | unsigned long flags, next_reconfig, delay; | |
c996edcf | 1080 | |
1bdcec8a VK |
1081 | rtnl_lock(); |
1082 | if (ndev_ctx->start_remove) | |
1083 | goto out_unlock; | |
1084 | ||
3d541ac5 | 1085 | net_device = ndev_ctx->nvdev; |
891de74d | 1086 | rdev = net_device->extension; |
891de74d | 1087 | |
27a70af3 VK |
1088 | next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT; |
1089 | if (time_is_after_jiffies(next_reconfig)) { | |
1090 | /* link_watch only sends one notification with current state | |
1091 | * per second, avoid doing reconfig more frequently. Handle | |
1092 | * wrap around. | |
1093 | */ | |
1094 | delay = next_reconfig - jiffies; | |
1095 | delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT; | |
1096 | schedule_delayed_work(&ndev_ctx->dwork, delay); | |
1bdcec8a | 1097 | goto out_unlock; |
27a70af3 VK |
1098 | } |
1099 | ndev_ctx->last_reconfig = jiffies; | |
1100 | ||
1101 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
1102 | if (!list_empty(&ndev_ctx->reconfig_events)) { | |
1103 | event = list_first_entry(&ndev_ctx->reconfig_events, | |
1104 | struct netvsc_reconfig, list); | |
1105 | list_del(&event->list); | |
1106 | reschedule = !list_empty(&ndev_ctx->reconfig_events); | |
1107 | } | |
1108 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
1109 | ||
1110 | if (!event) | |
1bdcec8a | 1111 | goto out_unlock; |
27a70af3 VK |
1112 | |
1113 | switch (event->event) { | |
1114 | /* Only the following events are possible due to the check in | |
1115 | * netvsc_linkstatus_callback() | |
1116 | */ | |
1117 | case RNDIS_STATUS_MEDIA_CONNECT: | |
1118 | if (rdev->link_state) { | |
1119 | rdev->link_state = false; | |
1120 | netif_carrier_on(net); | |
1121 | netif_tx_wake_all_queues(net); | |
1122 | } else { | |
1123 | notify = true; | |
1124 | } | |
1125 | kfree(event); | |
1126 | break; | |
1127 | case RNDIS_STATUS_MEDIA_DISCONNECT: | |
1128 | if (!rdev->link_state) { | |
1129 | rdev->link_state = true; | |
1130 | netif_carrier_off(net); | |
1131 | netif_tx_stop_all_queues(net); | |
1132 | } | |
1133 | kfree(event); | |
1134 | break; | |
1135 | case RNDIS_STATUS_NETWORK_CHANGE: | |
1136 | /* Only makes sense if carrier is present */ | |
1137 | if (!rdev->link_state) { | |
1138 | rdev->link_state = true; | |
1139 | netif_carrier_off(net); | |
1140 | netif_tx_stop_all_queues(net); | |
1141 | event->event = RNDIS_STATUS_MEDIA_CONNECT; | |
1142 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
15cfd407 | 1143 | list_add(&event->list, &ndev_ctx->reconfig_events); |
27a70af3 VK |
1144 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
1145 | reschedule = true; | |
3a494e71 | 1146 | } |
27a70af3 | 1147 | break; |
891de74d HZ |
1148 | } |
1149 | ||
1150 | rtnl_unlock(); | |
1151 | ||
1152 | if (notify) | |
1153 | netdev_notify_peers(net); | |
27a70af3 VK |
1154 | |
1155 | /* link_watch only sends one notification with current state per | |
1156 | * second, handle next reconfig event in 2 seconds. | |
1157 | */ | |
1158 | if (reschedule) | |
1159 | schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); | |
1bdcec8a VK |
1160 | |
1161 | return; | |
1162 | ||
1163 | out_unlock: | |
1164 | rtnl_unlock(); | |
c996edcf HZ |
1165 | } |
1166 | ||
7eafd9b4 | 1167 | static void netvsc_free_netdev(struct net_device *netdev) |
1168 | { | |
1169 | struct net_device_context *net_device_ctx = netdev_priv(netdev); | |
1170 | ||
1171 | free_percpu(net_device_ctx->tx_stats); | |
1172 | free_percpu(net_device_ctx->rx_stats); | |
1173 | free_netdev(netdev); | |
1174 | } | |
c996edcf | 1175 | |
e8ff40d4 | 1176 | static struct net_device *get_netvsc_bymac(const u8 *mac) |
84bf9cef | 1177 | { |
e8ff40d4 | 1178 | struct net_device *dev; |
84bf9cef | 1179 | |
8737caaf | 1180 | ASSERT_RTNL(); |
84bf9cef KS |
1181 | |
1182 | for_each_netdev(&init_net, dev) { | |
e8ff40d4 SH |
1183 | if (dev->netdev_ops != &device_ops) |
1184 | continue; /* not a netvsc device */ | |
1185 | ||
1186 | if (ether_addr_equal(mac, dev->perm_addr)) | |
1187 | return dev; | |
1188 | } | |
1189 | ||
1190 | return NULL; | |
1191 | } | |
1192 | ||
f207c10d | 1193 | static struct net_device *get_netvsc_byref(struct net_device *vf_netdev) |
e8ff40d4 SH |
1194 | { |
1195 | struct net_device *dev; | |
1196 | ||
1197 | ASSERT_RTNL(); | |
1198 | ||
1199 | for_each_netdev(&init_net, dev) { | |
1200 | struct net_device_context *net_device_ctx; | |
1201 | ||
1202 | if (dev->netdev_ops != &device_ops) | |
1203 | continue; /* not a netvsc device */ | |
1204 | ||
1205 | net_device_ctx = netdev_priv(dev); | |
1206 | if (net_device_ctx->nvdev == NULL) | |
1207 | continue; /* device is removed */ | |
1208 | ||
f207c10d | 1209 | if (rtnl_dereference(net_device_ctx->vf_netdev) == vf_netdev) |
e8ff40d4 | 1210 | return dev; /* a match */ |
84bf9cef | 1211 | } |
84bf9cef | 1212 | |
e8ff40d4 | 1213 | return NULL; |
84bf9cef KS |
1214 | } |
1215 | ||
1216 | static int netvsc_register_vf(struct net_device *vf_netdev) | |
1217 | { | |
0a1275ca VK |
1218 | struct net_device *ndev; |
1219 | struct net_device_context *net_device_ctx; | |
84bf9cef | 1220 | struct netvsc_device *netvsc_dev; |
84bf9cef | 1221 | |
e8ff40d4 SH |
1222 | if (vf_netdev->addr_len != ETH_ALEN) |
1223 | return NOTIFY_DONE; | |
1224 | ||
84bf9cef KS |
1225 | /* |
1226 | * We will use the MAC address to locate the synthetic interface to | |
1227 | * associate with the VF interface. If we don't find a matching | |
1228 | * synthetic interface, move on. | |
1229 | */ | |
e8ff40d4 | 1230 | ndev = get_netvsc_bymac(vf_netdev->perm_addr); |
0a1275ca VK |
1231 | if (!ndev) |
1232 | return NOTIFY_DONE; | |
1233 | ||
1234 | net_device_ctx = netdev_priv(ndev); | |
1235 | netvsc_dev = net_device_ctx->nvdev; | |
f207c10d | 1236 | if (!netvsc_dev || rtnl_dereference(net_device_ctx->vf_netdev)) |
84bf9cef KS |
1237 | return NOTIFY_DONE; |
1238 | ||
0a1275ca | 1239 | netdev_info(ndev, "VF registering: %s\n", vf_netdev->name); |
84bf9cef KS |
1240 | /* |
1241 | * Take a reference on the module. | |
1242 | */ | |
1243 | try_module_get(THIS_MODULE); | |
07d0f000 SH |
1244 | |
1245 | dev_hold(vf_netdev); | |
f207c10d | 1246 | rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev); |
84bf9cef KS |
1247 | return NOTIFY_OK; |
1248 | } | |
1249 | ||
84bf9cef KS |
1250 | static int netvsc_vf_up(struct net_device *vf_netdev) |
1251 | { | |
0a1275ca | 1252 | struct net_device *ndev; |
84bf9cef | 1253 | struct netvsc_device *netvsc_dev; |
84bf9cef KS |
1254 | struct net_device_context *net_device_ctx; |
1255 | ||
e8ff40d4 | 1256 | ndev = get_netvsc_byref(vf_netdev); |
0a1275ca VK |
1257 | if (!ndev) |
1258 | return NOTIFY_DONE; | |
1259 | ||
1260 | net_device_ctx = netdev_priv(ndev); | |
1261 | netvsc_dev = net_device_ctx->nvdev; | |
84bf9cef | 1262 | |
0a1275ca | 1263 | netdev_info(ndev, "VF up: %s\n", vf_netdev->name); |
84bf9cef KS |
1264 | |
1265 | /* | |
1266 | * Open the device before switching data path. | |
1267 | */ | |
2f5fa6c8 | 1268 | rndis_filter_open(netvsc_dev); |
84bf9cef KS |
1269 | |
1270 | /* | |
1271 | * notify the host to switch the data path. | |
1272 | */ | |
0a1275ca VK |
1273 | netvsc_switch_datapath(ndev, true); |
1274 | netdev_info(ndev, "Data path switched to VF: %s\n", vf_netdev->name); | |
84bf9cef | 1275 | |
0a1275ca | 1276 | netif_carrier_off(ndev); |
84bf9cef | 1277 | |
d072218f VK |
1278 | /* Now notify peers through VF device. */ |
1279 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, vf_netdev); | |
84bf9cef KS |
1280 | |
1281 | return NOTIFY_OK; | |
1282 | } | |
1283 | ||
84bf9cef KS |
1284 | static int netvsc_vf_down(struct net_device *vf_netdev) |
1285 | { | |
0a1275ca | 1286 | struct net_device *ndev; |
84bf9cef KS |
1287 | struct netvsc_device *netvsc_dev; |
1288 | struct net_device_context *net_device_ctx; | |
84bf9cef | 1289 | |
e8ff40d4 | 1290 | ndev = get_netvsc_byref(vf_netdev); |
0a1275ca VK |
1291 | if (!ndev) |
1292 | return NOTIFY_DONE; | |
1293 | ||
1294 | net_device_ctx = netdev_priv(ndev); | |
1295 | netvsc_dev = net_device_ctx->nvdev; | |
84bf9cef | 1296 | |
0a1275ca | 1297 | netdev_info(ndev, "VF down: %s\n", vf_netdev->name); |
0a1275ca VK |
1298 | netvsc_switch_datapath(ndev, false); |
1299 | netdev_info(ndev, "Data path switched from VF: %s\n", vf_netdev->name); | |
2f5fa6c8 | 1300 | rndis_filter_close(netvsc_dev); |
0a1275ca | 1301 | netif_carrier_on(ndev); |
d072218f VK |
1302 | |
1303 | /* Now notify peers through netvsc device. */ | |
1304 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, ndev); | |
84bf9cef KS |
1305 | |
1306 | return NOTIFY_OK; | |
1307 | } | |
1308 | ||
84bf9cef KS |
1309 | static int netvsc_unregister_vf(struct net_device *vf_netdev) |
1310 | { | |
0a1275ca | 1311 | struct net_device *ndev; |
84bf9cef | 1312 | struct netvsc_device *netvsc_dev; |
0a1275ca | 1313 | struct net_device_context *net_device_ctx; |
84bf9cef | 1314 | |
e8ff40d4 | 1315 | ndev = get_netvsc_byref(vf_netdev); |
0a1275ca VK |
1316 | if (!ndev) |
1317 | return NOTIFY_DONE; | |
1318 | ||
1319 | net_device_ctx = netdev_priv(ndev); | |
1320 | netvsc_dev = net_device_ctx->nvdev; | |
e8ff40d4 | 1321 | |
0a1275ca | 1322 | netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); |
f207c10d SH |
1323 | |
1324 | RCU_INIT_POINTER(net_device_ctx->vf_netdev, NULL); | |
07d0f000 | 1325 | dev_put(vf_netdev); |
84bf9cef KS |
1326 | module_put(THIS_MODULE); |
1327 | return NOTIFY_OK; | |
1328 | } | |
1329 | ||
84946899 S |
1330 | static int netvsc_probe(struct hv_device *dev, |
1331 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 1332 | { |
df2fff28 GKH |
1333 | struct net_device *net = NULL; |
1334 | struct net_device_context *net_device_ctx; | |
1335 | struct netvsc_device_info device_info; | |
5b54dac8 | 1336 | struct netvsc_device *nvdev; |
df2fff28 GKH |
1337 | int ret; |
1338 | ||
5b54dac8 HZ |
1339 | net = alloc_etherdev_mq(sizeof(struct net_device_context), |
1340 | num_online_cpus()); | |
df2fff28 | 1341 | if (!net) |
51a805d0 | 1342 | return -ENOMEM; |
df2fff28 | 1343 | |
1b07da51 HZ |
1344 | netif_carrier_off(net); |
1345 | ||
b37879e6 HZ |
1346 | netvsc_init_settings(net); |
1347 | ||
df2fff28 | 1348 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 1349 | net_device_ctx->device_ctx = dev; |
3f300ff4 SX |
1350 | net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); |
1351 | if (netif_msg_probe(net_device_ctx)) | |
1352 | netdev_dbg(net, "netvsc msg_enable: %d\n", | |
1353 | net_device_ctx->msg_enable); | |
1354 | ||
7eafd9b4 | 1355 | net_device_ctx->tx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); |
1356 | if (!net_device_ctx->tx_stats) { | |
1357 | free_netdev(net); | |
1358 | return -ENOMEM; | |
1359 | } | |
1360 | net_device_ctx->rx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); | |
1361 | if (!net_device_ctx->rx_stats) { | |
1362 | free_percpu(net_device_ctx->tx_stats); | |
1363 | free_netdev(net); | |
1364 | return -ENOMEM; | |
1365 | } | |
1366 | ||
2ddd5e5f | 1367 | hv_set_drvdata(dev, net); |
f580aec4 VK |
1368 | |
1369 | net_device_ctx->start_remove = false; | |
1370 | ||
891de74d | 1371 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
792df872 | 1372 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
df2fff28 | 1373 | |
27a70af3 VK |
1374 | spin_lock_init(&net_device_ctx->lock); |
1375 | INIT_LIST_HEAD(&net_device_ctx->reconfig_events); | |
1376 | ||
df2fff28 GKH |
1377 | net->netdev_ops = &device_ops; |
1378 | ||
a060679c | 1379 | net->hw_features = NETVSC_HW_FEATURES; |
1380 | net->features = NETVSC_HW_FEATURES | NETIF_F_HW_VLAN_CTAG_TX; | |
6048718d | 1381 | |
7ad24ea4 | 1382 | net->ethtool_ops = ðtool_ops; |
9efd21e1 | 1383 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 1384 | |
14a03cf8 VK |
1385 | /* We always need headroom for rndis header */ |
1386 | net->needed_headroom = RNDIS_AND_PPI_SIZE; | |
1387 | ||
692e084e | 1388 | /* Notify the netvsc driver of the new device */ |
8ebdcc52 | 1389 | memset(&device_info, 0, sizeof(device_info)); |
692e084e | 1390 | device_info.ring_size = ring_size; |
e01ec219 | 1391 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
692e084e HZ |
1392 | ret = rndis_filter_device_add(dev, &device_info); |
1393 | if (ret != 0) { | |
1394 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
7eafd9b4 | 1395 | netvsc_free_netdev(net); |
2ddd5e5f | 1396 | hv_set_drvdata(dev, NULL); |
692e084e | 1397 | return ret; |
df2fff28 | 1398 | } |
692e084e HZ |
1399 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
1400 | ||
3d541ac5 | 1401 | nvdev = net_device_ctx->nvdev; |
5b54dac8 HZ |
1402 | netif_set_real_num_tx_queues(net, nvdev->num_chn); |
1403 | netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
5b54dac8 | 1404 | |
a68f9614 HZ |
1405 | ret = register_netdev(net); |
1406 | if (ret != 0) { | |
1407 | pr_err("Unable to register netdev.\n"); | |
1408 | rndis_filter_device_remove(dev); | |
7eafd9b4 | 1409 | netvsc_free_netdev(net); |
a68f9614 HZ |
1410 | } |
1411 | ||
df2fff28 GKH |
1412 | return ret; |
1413 | } | |
1414 | ||
415b023a | 1415 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 1416 | { |
2ddd5e5f | 1417 | struct net_device *net; |
122a5f64 | 1418 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
1419 | struct netvsc_device *net_device; |
1420 | ||
3d541ac5 | 1421 | net = hv_get_drvdata(dev); |
df2fff28 | 1422 | |
df2fff28 | 1423 | if (net == NULL) { |
415b023a | 1424 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
1425 | return 0; |
1426 | } | |
1427 | ||
122a5f64 | 1428 | ndev_ctx = netdev_priv(net); |
3d541ac5 VK |
1429 | net_device = ndev_ctx->nvdev; |
1430 | ||
6da7225f VK |
1431 | /* Avoid racing with netvsc_change_mtu()/netvsc_set_channels() |
1432 | * removing the device. | |
1433 | */ | |
1434 | rtnl_lock(); | |
f580aec4 | 1435 | ndev_ctx->start_remove = true; |
6da7225f | 1436 | rtnl_unlock(); |
f580aec4 | 1437 | |
122a5f64 | 1438 | cancel_delayed_work_sync(&ndev_ctx->dwork); |
792df872 | 1439 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 1440 | |
df2fff28 | 1441 | /* Stop outbound asap */ |
0a282538 | 1442 | netif_tx_disable(net); |
df2fff28 GKH |
1443 | |
1444 | unregister_netdev(net); | |
1445 | ||
1446 | /* | |
1447 | * Call to the vsc driver to let it know that the device is being | |
1448 | * removed | |
1449 | */ | |
df06bcff | 1450 | rndis_filter_device_remove(dev); |
df2fff28 | 1451 | |
3d541ac5 VK |
1452 | hv_set_drvdata(dev, NULL); |
1453 | ||
7eafd9b4 | 1454 | netvsc_free_netdev(net); |
df06bcff | 1455 | return 0; |
df2fff28 GKH |
1456 | } |
1457 | ||
345c4cc3 | 1458 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 1459 | /* Network guid */ |
8f505944 | 1460 | { HV_NIC_GUID, }, |
c45cf2d4 | 1461 | { }, |
345c4cc3 S |
1462 | }; |
1463 | ||
1464 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
1465 | ||
f1542a66 | 1466 | /* The one and only one */ |
fde0ef9b | 1467 | static struct hv_driver netvsc_drv = { |
d31b20fc | 1468 | .name = KBUILD_MODNAME, |
345c4cc3 | 1469 | .id_table = id_table, |
fde0ef9b S |
1470 | .probe = netvsc_probe, |
1471 | .remove = netvsc_remove, | |
d4890970 | 1472 | }; |
f1542a66 | 1473 | |
84bf9cef KS |
1474 | /* |
1475 | * On Hyper-V, every VF interface is matched with a corresponding | |
1476 | * synthetic interface. The synthetic interface is presented first | |
1477 | * to the guest. When the corresponding VF instance is registered, | |
1478 | * we will take care of switching the data path. | |
1479 | */ | |
1480 | static int netvsc_netdev_event(struct notifier_block *this, | |
1481 | unsigned long event, void *ptr) | |
1482 | { | |
1483 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); | |
1484 | ||
ee837a13 SH |
1485 | /* Skip our own events */ |
1486 | if (event_dev->netdev_ops == &device_ops) | |
1487 | return NOTIFY_DONE; | |
1488 | ||
1489 | /* Avoid non-Ethernet type devices */ | |
1490 | if (event_dev->type != ARPHRD_ETHER) | |
1491 | return NOTIFY_DONE; | |
1492 | ||
0dbff144 VK |
1493 | /* Avoid Vlan dev with same MAC registering as VF */ |
1494 | if (event_dev->priv_flags & IFF_802_1Q_VLAN) | |
1495 | return NOTIFY_DONE; | |
1496 | ||
1497 | /* Avoid Bonding master dev with same MAC registering as VF */ | |
ee837a13 SH |
1498 | if ((event_dev->priv_flags & IFF_BONDING) && |
1499 | (event_dev->flags & IFF_MASTER)) | |
cb2911fe HZ |
1500 | return NOTIFY_DONE; |
1501 | ||
84bf9cef KS |
1502 | switch (event) { |
1503 | case NETDEV_REGISTER: | |
1504 | return netvsc_register_vf(event_dev); | |
1505 | case NETDEV_UNREGISTER: | |
1506 | return netvsc_unregister_vf(event_dev); | |
1507 | case NETDEV_UP: | |
1508 | return netvsc_vf_up(event_dev); | |
1509 | case NETDEV_DOWN: | |
1510 | return netvsc_vf_down(event_dev); | |
1511 | default: | |
1512 | return NOTIFY_DONE; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | static struct notifier_block netvsc_netdev_notifier = { | |
1517 | .notifier_call = netvsc_netdev_event, | |
1518 | }; | |
1519 | ||
a9869c94 | 1520 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 1521 | { |
84bf9cef | 1522 | unregister_netdevice_notifier(&netvsc_netdev_notifier); |
768fa219 | 1523 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
1524 | } |
1525 | ||
1fde28cf | 1526 | static int __init netvsc_drv_init(void) |
df2fff28 | 1527 | { |
84bf9cef KS |
1528 | int ret; |
1529 | ||
fa85a6c2 HZ |
1530 | if (ring_size < RING_SIZE_MIN) { |
1531 | ring_size = RING_SIZE_MIN; | |
1532 | pr_info("Increased ring_size to %d (min allowed)\n", | |
1533 | ring_size); | |
1534 | } | |
84bf9cef KS |
1535 | ret = vmbus_driver_register(&netvsc_drv); |
1536 | ||
1537 | if (ret) | |
1538 | return ret; | |
1539 | ||
1540 | register_netdevice_notifier(&netvsc_netdev_notifier); | |
1541 | return 0; | |
df2fff28 GKH |
1542 | } |
1543 | ||
26c14cc1 | 1544 | MODULE_LICENSE("GPL"); |
7880fc54 | 1545 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 1546 | |
1fde28cf | 1547 | module_init(netvsc_drv_init); |
a9869c94 | 1548 | module_exit(netvsc_drv_exit); |