Commit | Line | Data |
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fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
adf8d3ff | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
fceaf24a HJ |
15 | * |
16 | * Authors: | |
d0e94d17 | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 18 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 19 | */ |
eb335bc4 HJ |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
fceaf24a | 22 | #include <linux/init.h> |
9079ce69 | 23 | #include <linux/atomic.h> |
fceaf24a HJ |
24 | #include <linux/module.h> |
25 | #include <linux/highmem.h> | |
26 | #include <linux/device.h> | |
fceaf24a | 27 | #include <linux/io.h> |
fceaf24a HJ |
28 | #include <linux/delay.h> |
29 | #include <linux/netdevice.h> | |
30 | #include <linux/inetdevice.h> | |
31 | #include <linux/etherdevice.h> | |
32 | #include <linux/skbuff.h> | |
c802db11 | 33 | #include <linux/if_vlan.h> |
fceaf24a | 34 | #include <linux/in.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
fceaf24a HJ |
36 | #include <net/arp.h> |
37 | #include <net/route.h> | |
38 | #include <net/sock.h> | |
39 | #include <net/pkt_sched.h> | |
3f335ea2 | 40 | |
5ca7252a | 41 | #include "hyperv_net.h" |
fceaf24a | 42 | |
fa85a6c2 | 43 | #define RING_SIZE_MIN 64 |
27a70af3 | 44 | #define LINKCHANGE_INT (2 * HZ) |
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 KS |
444 | net_trans_info = get_net_transport_info(skb, &hdr_offset); |
445 | if (net_trans_info == TRANSPORT_INFO_NOT_IP) | |
446 | goto do_send; | |
447 | ||
448 | /* | |
449 | * Setup the sendside checksum offload only if this is not a | |
450 | * GSO packet. | |
451 | */ | |
0ab05141 SH |
452 | if (skb_is_gso(skb)) { |
453 | struct ndis_tcp_lso_info *lso_info; | |
454 | ||
455 | rndis_msg_size += NDIS_LSO_PPI_SIZE; | |
456 | ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, | |
457 | TCP_LARGESEND_PKTINFO); | |
458 | ||
459 | lso_info = (struct ndis_tcp_lso_info *)((void *)ppi + | |
460 | ppi->ppi_offset); | |
461 | ||
462 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; | |
463 | if (net_trans_info & (INFO_IPV4 << 16)) { | |
464 | lso_info->lso_v2_transmit.ip_version = | |
465 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; | |
466 | ip_hdr(skb)->tot_len = 0; | |
467 | ip_hdr(skb)->check = 0; | |
468 | tcp_hdr(skb)->check = | |
469 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
470 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
471 | } else { | |
472 | lso_info->lso_v2_transmit.ip_version = | |
473 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; | |
474 | ipv6_hdr(skb)->payload_len = 0; | |
475 | tcp_hdr(skb)->check = | |
476 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
477 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
478 | } | |
479 | lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset; | |
480 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; | |
481 | goto do_send; | |
482 | } | |
08cd04bf | 483 | |
22041fb0 KS |
484 | if ((skb->ip_summed == CHECKSUM_NONE) || |
485 | (skb->ip_summed == CHECKSUM_UNNECESSARY)) | |
486 | goto do_send; | |
487 | ||
08cd04bf KS |
488 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; |
489 | ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, | |
490 | TCPIP_CHKSUM_PKTINFO); | |
491 | ||
492 | csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + | |
493 | ppi->ppi_offset); | |
494 | ||
495 | if (net_trans_info & (INFO_IPV4 << 16)) | |
496 | csum_info->transmit.is_ipv4 = 1; | |
497 | else | |
498 | csum_info->transmit.is_ipv6 = 1; | |
499 | ||
500 | if (net_trans_info & INFO_TCP) { | |
501 | csum_info->transmit.tcp_checksum = 1; | |
502 | csum_info->transmit.tcp_header_offset = hdr_offset; | |
503 | } else if (net_trans_info & INFO_UDP) { | |
af9893a3 KS |
504 | /* UDP checksum offload is not supported on ws2008r2. |
505 | * Furthermore, on ws2012 and ws2012r2, there are some | |
506 | * issues with udp checksum offload from Linux guests. | |
507 | * (these are host issues). | |
508 | * For now compute the checksum here. | |
509 | */ | |
510 | struct udphdr *uh; | |
511 | u16 udp_len; | |
512 | ||
513 | ret = skb_cow_head(skb, 0); | |
514 | if (ret) | |
4323b47c | 515 | goto no_memory; |
af9893a3 KS |
516 | |
517 | uh = udp_hdr(skb); | |
518 | udp_len = ntohs(uh->len); | |
519 | uh->check = 0; | |
520 | uh->check = csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
521 | ip_hdr(skb)->daddr, | |
522 | udp_len, IPPROTO_UDP, | |
523 | csum_partial(uh, udp_len, 0)); | |
524 | if (uh->check == 0) | |
525 | uh->check = CSUM_MANGLED_0; | |
526 | ||
527 | csum_info->transmit.udp_checksum = 0; | |
08cd04bf KS |
528 | } |
529 | ||
530 | do_send: | |
8a00251a KS |
531 | /* Start filling in the page buffers with the rndis hdr */ |
532 | rndis_msg->msg_len += rndis_msg_size; | |
942396b0 | 533 | packet->total_data_buflen = rndis_msg->msg_len; |
8a00251a | 534 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, |
a9f2e2d6 | 535 | skb, packet, &pb); |
8a00251a | 536 | |
76d13b56 | 537 | /* timestamp packet in software */ |
538 | skb_tx_timestamp(skb); | |
3a3d9a0a KS |
539 | ret = netvsc_send(net_device_ctx->device_ctx, packet, |
540 | rndis_msg, &pb, skb); | |
0ab05141 | 541 | if (likely(ret == 0)) { |
4323b47c SH |
542 | struct netvsc_stats *tx_stats = this_cpu_ptr(net_device_ctx->tx_stats); |
543 | ||
4b02b58b | 544 | u64_stats_update_begin(&tx_stats->syncp); |
7eafd9b4 | 545 | tx_stats->packets++; |
546 | tx_stats->bytes += skb_length; | |
4b02b58b | 547 | u64_stats_update_end(&tx_stats->syncp); |
0ab05141 | 548 | return NETDEV_TX_OK; |
fceaf24a | 549 | } |
4323b47c SH |
550 | |
551 | if (ret == -EAGAIN) { | |
552 | ++net_device_ctx->eth_stats.tx_busy; | |
0ab05141 | 553 | return NETDEV_TX_BUSY; |
4323b47c SH |
554 | } |
555 | ||
556 | if (ret == -ENOSPC) | |
557 | ++net_device_ctx->eth_stats.tx_no_space; | |
0ab05141 SH |
558 | |
559 | drop: | |
560 | dev_kfree_skb_any(skb); | |
561 | net->stats.tx_dropped++; | |
fceaf24a | 562 | |
0ab05141 | 563 | return NETDEV_TX_OK; |
4323b47c SH |
564 | |
565 | no_memory: | |
566 | ++net_device_ctx->eth_stats.tx_no_memory; | |
567 | goto drop; | |
fceaf24a HJ |
568 | } |
569 | ||
3e189519 | 570 | /* |
02fafbc6 GKH |
571 | * netvsc_linkstatus_callback - Link up/down notification |
572 | */ | |
90ef117a | 573 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
3a494e71 | 574 | struct rndis_message *resp) |
fceaf24a | 575 | { |
3a494e71 | 576 | struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
2ddd5e5f | 577 | struct net_device *net; |
c996edcf | 578 | struct net_device_context *ndev_ctx; |
27a70af3 VK |
579 | struct netvsc_reconfig *event; |
580 | unsigned long flags; | |
891de74d | 581 | |
7f5d5af0 HZ |
582 | net = hv_get_drvdata(device_obj); |
583 | ||
584 | if (!net) | |
585 | return; | |
586 | ||
587 | ndev_ctx = netdev_priv(net); | |
588 | ||
589 | /* Update the physical link speed when changing to another vSwitch */ | |
590 | if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) { | |
591 | u32 speed; | |
592 | ||
593 | speed = *(u32 *)((void *)indicate + indicate-> | |
594 | status_buf_offset) / 10000; | |
595 | ndev_ctx->speed = speed; | |
596 | return; | |
597 | } | |
598 | ||
599 | /* Handle these link change statuses below */ | |
27a70af3 VK |
600 | if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE && |
601 | indicate->status != RNDIS_STATUS_MEDIA_CONNECT && | |
602 | indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT) | |
3a494e71 | 603 | return; |
891de74d | 604 | |
7f5d5af0 | 605 | if (net->reg_state != NETREG_REGISTERED) |
fceaf24a | 606 | return; |
fceaf24a | 607 | |
27a70af3 VK |
608 | event = kzalloc(sizeof(*event), GFP_ATOMIC); |
609 | if (!event) | |
610 | return; | |
611 | event->event = indicate->status; | |
612 | ||
613 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
614 | list_add_tail(&event->list, &ndev_ctx->reconfig_events); | |
615 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
616 | ||
617 | schedule_delayed_work(&ndev_ctx->dwork, 0); | |
fceaf24a HJ |
618 | } |
619 | ||
84bf9cef | 620 | static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net, |
e3d605ed | 621 | struct hv_netvsc_packet *packet, |
25b85ee8 | 622 | struct ndis_tcp_ip_checksum_info *csum_info, |
84bf9cef | 623 | void *data, u16 vlan_tci) |
fceaf24a | 624 | { |
fceaf24a | 625 | struct sk_buff *skb; |
fceaf24a | 626 | |
72a2f5bd | 627 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
84bf9cef KS |
628 | if (!skb) |
629 | return skb; | |
fceaf24a | 630 | |
02fafbc6 GKH |
631 | /* |
632 | * Copy to skb. This copy is needed here since the memory pointed by | |
633 | * hv_netvsc_packet cannot be deallocated | |
634 | */ | |
84bf9cef KS |
635 | memcpy(skb_put(skb, packet->total_data_buflen), data, |
636 | packet->total_data_buflen); | |
fceaf24a HJ |
637 | |
638 | skb->protocol = eth_type_trans(skb, net); | |
e3d605ed KS |
639 | if (csum_info) { |
640 | /* We only look at the IP checksum here. | |
641 | * Should we be dropping the packet if checksum | |
642 | * failed? How do we deal with other checksums - TCP/UDP? | |
643 | */ | |
644 | if (csum_info->receive.ip_checksum_succeeded) | |
645 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
646 | else | |
647 | skb->ip_summed = CHECKSUM_NONE; | |
648 | } | |
649 | ||
760d1e36 | 650 | if (vlan_tci & VLAN_TAG_PRESENT) |
93725cbd | 651 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
760d1e36 | 652 | vlan_tci); |
fceaf24a | 653 | |
84bf9cef KS |
654 | return skb; |
655 | } | |
656 | ||
657 | /* | |
658 | * netvsc_recv_callback - Callback when we receive a packet from the | |
659 | * "wire" on the specified device. | |
660 | */ | |
661 | int netvsc_recv_callback(struct hv_device *device_obj, | |
662 | struct hv_netvsc_packet *packet, | |
663 | void **data, | |
664 | struct ndis_tcp_ip_checksum_info *csum_info, | |
665 | struct vmbus_channel *channel, | |
666 | u16 vlan_tci) | |
667 | { | |
3d541ac5 VK |
668 | struct net_device *net = hv_get_drvdata(device_obj); |
669 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
84bf9cef KS |
670 | struct sk_buff *skb; |
671 | struct sk_buff *vf_skb; | |
672 | struct netvsc_stats *rx_stats; | |
84bf9cef KS |
673 | u32 bytes_recvd = packet->total_data_buflen; |
674 | int ret = 0; | |
675 | ||
84bf9cef KS |
676 | if (!net || net->reg_state != NETREG_REGISTERED) |
677 | return NVSP_STAT_FAIL; | |
678 | ||
f9a7da91 VK |
679 | if (READ_ONCE(net_device_ctx->vf_inject)) { |
680 | atomic_inc(&net_device_ctx->vf_use_cnt); | |
681 | if (!READ_ONCE(net_device_ctx->vf_inject)) { | |
84bf9cef KS |
682 | /* |
683 | * We raced; just move on. | |
684 | */ | |
f9a7da91 | 685 | atomic_dec(&net_device_ctx->vf_use_cnt); |
84bf9cef KS |
686 | goto vf_injection_done; |
687 | } | |
688 | ||
689 | /* | |
690 | * Inject this packet into the VF inerface. | |
691 | * On Hyper-V, multicast and brodcast packets | |
692 | * are only delivered on the synthetic interface | |
693 | * (after subjecting these to policy filters on | |
694 | * the host). Deliver these via the VF interface | |
695 | * in the guest. | |
696 | */ | |
f9a7da91 VK |
697 | vf_skb = netvsc_alloc_recv_skb(net_device_ctx->vf_netdev, |
698 | packet, csum_info, *data, | |
699 | vlan_tci); | |
84bf9cef | 700 | if (vf_skb != NULL) { |
f9a7da91 VK |
701 | ++net_device_ctx->vf_netdev->stats.rx_packets; |
702 | net_device_ctx->vf_netdev->stats.rx_bytes += | |
703 | bytes_recvd; | |
84bf9cef KS |
704 | netif_receive_skb(vf_skb); |
705 | } else { | |
706 | ++net->stats.rx_dropped; | |
707 | ret = NVSP_STAT_FAIL; | |
708 | } | |
f9a7da91 | 709 | atomic_dec(&net_device_ctx->vf_use_cnt); |
84bf9cef KS |
710 | return ret; |
711 | } | |
712 | ||
713 | vf_injection_done: | |
84bf9cef KS |
714 | rx_stats = this_cpu_ptr(net_device_ctx->rx_stats); |
715 | ||
716 | /* Allocate a skb - TODO direct I/O to pages? */ | |
717 | skb = netvsc_alloc_recv_skb(net, packet, csum_info, *data, vlan_tci); | |
718 | if (unlikely(!skb)) { | |
719 | ++net->stats.rx_dropped; | |
720 | return NVSP_STAT_FAIL; | |
721 | } | |
25b85ee8 | 722 | skb_record_rx_queue(skb, channel-> |
e565e803 | 723 | offermsg.offer.sub_channel_index); |
5b54dac8 | 724 | |
4b02b58b | 725 | u64_stats_update_begin(&rx_stats->syncp); |
7eafd9b4 | 726 | rx_stats->packets++; |
727 | rx_stats->bytes += packet->total_data_buflen; | |
4b02b58b | 728 | u64_stats_update_end(&rx_stats->syncp); |
9495c282 | 729 | |
02fafbc6 GKH |
730 | /* |
731 | * Pass the skb back up. Network stack will deallocate the skb when it | |
9495c282 SH |
732 | * is done. |
733 | * TODO - use NAPI? | |
02fafbc6 | 734 | */ |
9495c282 | 735 | netif_rx(skb); |
fceaf24a | 736 | |
fceaf24a HJ |
737 | return 0; |
738 | } | |
739 | ||
f82f4ad7 SH |
740 | static void netvsc_get_drvinfo(struct net_device *net, |
741 | struct ethtool_drvinfo *info) | |
742 | { | |
e3f74b84 SH |
743 | struct net_device_context *net_device_ctx = netdev_priv(net); |
744 | struct hv_device *dev = net_device_ctx->device_ctx; | |
745 | ||
7826d43f | 746 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 747 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
e3f74b84 | 748 | strlcpy(info->bus_info, vmbus_dev_name(dev), sizeof(info->bus_info)); |
f82f4ad7 SH |
749 | } |
750 | ||
59995370 AS |
751 | static void netvsc_get_channels(struct net_device *net, |
752 | struct ethtool_channels *channel) | |
753 | { | |
754 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
3d541ac5 | 755 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
59995370 AS |
756 | |
757 | if (nvdev) { | |
758 | channel->max_combined = nvdev->max_chn; | |
759 | channel->combined_count = nvdev->num_chn; | |
760 | } | |
761 | } | |
762 | ||
b5960e6e AS |
763 | static int netvsc_set_channels(struct net_device *net, |
764 | struct ethtool_channels *channels) | |
765 | { | |
766 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
767 | struct hv_device *dev = net_device_ctx->device_ctx; | |
3d541ac5 | 768 | struct netvsc_device *nvdev = net_device_ctx->nvdev; |
b5960e6e | 769 | struct netvsc_device_info device_info; |
954591b9 AS |
770 | u32 num_chn; |
771 | u32 max_chn; | |
b5960e6e AS |
772 | int ret = 0; |
773 | bool recovering = false; | |
774 | ||
6da7225f | 775 | if (net_device_ctx->start_remove || !nvdev || nvdev->destroy) |
b5960e6e AS |
776 | return -ENODEV; |
777 | ||
954591b9 AS |
778 | num_chn = nvdev->num_chn; |
779 | max_chn = min_t(u32, nvdev->max_chn, num_online_cpus()); | |
780 | ||
b5960e6e AS |
781 | if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) { |
782 | pr_info("vRSS unsupported before NVSP Version 5\n"); | |
783 | return -EINVAL; | |
784 | } | |
785 | ||
786 | /* We do not support rx, tx, or other */ | |
787 | if (!channels || | |
788 | channels->rx_count || | |
789 | channels->tx_count || | |
790 | channels->other_count || | |
791 | (channels->combined_count < 1)) | |
792 | return -EINVAL; | |
793 | ||
794 | if (channels->combined_count > max_chn) { | |
795 | pr_info("combined channels too high, using %d\n", max_chn); | |
796 | channels->combined_count = max_chn; | |
797 | } | |
798 | ||
799 | ret = netvsc_close(net); | |
800 | if (ret) | |
801 | goto out; | |
802 | ||
803 | do_set: | |
f580aec4 | 804 | net_device_ctx->start_remove = true; |
b5960e6e AS |
805 | rndis_filter_device_remove(dev); |
806 | ||
807 | nvdev->num_chn = channels->combined_count; | |
808 | ||
b5960e6e AS |
809 | memset(&device_info, 0, sizeof(device_info)); |
810 | device_info.num_chn = nvdev->num_chn; /* passed to RNDIS */ | |
811 | device_info.ring_size = ring_size; | |
812 | device_info.max_num_vrss_chns = max_num_vrss_chns; | |
813 | ||
814 | ret = rndis_filter_device_add(dev, &device_info); | |
815 | if (ret) { | |
816 | if (recovering) { | |
817 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
818 | return ret; | |
819 | } | |
820 | goto recover; | |
821 | } | |
822 | ||
3d541ac5 | 823 | nvdev = net_device_ctx->nvdev; |
b5960e6e AS |
824 | |
825 | ret = netif_set_real_num_tx_queues(net, nvdev->num_chn); | |
826 | if (ret) { | |
827 | if (recovering) { | |
828 | netdev_err(net, "could not set tx queue count (ret %d)\n", ret); | |
829 | return ret; | |
830 | } | |
831 | goto recover; | |
832 | } | |
833 | ||
834 | ret = netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
835 | if (ret) { | |
836 | if (recovering) { | |
837 | netdev_err(net, "could not set rx queue count (ret %d)\n", ret); | |
838 | return ret; | |
839 | } | |
840 | goto recover; | |
841 | } | |
842 | ||
843 | out: | |
844 | netvsc_open(net); | |
f580aec4 | 845 | net_device_ctx->start_remove = false; |
1bdcec8a VK |
846 | /* We may have missed link change notifications */ |
847 | schedule_delayed_work(&net_device_ctx->dwork, 0); | |
b5960e6e AS |
848 | |
849 | return ret; | |
850 | ||
851 | recover: | |
852 | /* If the above failed, we attempt to recover through the same | |
853 | * process but with the original number of channels. | |
854 | */ | |
855 | netdev_err(net, "could not set channels, recovering\n"); | |
856 | recovering = true; | |
857 | channels->combined_count = num_chn; | |
858 | goto do_set; | |
859 | } | |
860 | ||
49eb9389 | 861 | static bool netvsc_validate_ethtool_ss_cmd(const struct ethtool_cmd *cmd) |
862 | { | |
863 | struct ethtool_cmd diff1 = *cmd; | |
864 | struct ethtool_cmd diff2 = {}; | |
865 | ||
866 | ethtool_cmd_speed_set(&diff1, 0); | |
867 | diff1.duplex = 0; | |
868 | /* advertising and cmd are usually set */ | |
869 | diff1.advertising = 0; | |
870 | diff1.cmd = 0; | |
871 | /* We set port to PORT_OTHER */ | |
872 | diff2.port = PORT_OTHER; | |
873 | ||
874 | return !memcmp(&diff1, &diff2, sizeof(diff1)); | |
875 | } | |
876 | ||
877 | static void netvsc_init_settings(struct net_device *dev) | |
878 | { | |
879 | struct net_device_context *ndc = netdev_priv(dev); | |
880 | ||
881 | ndc->speed = SPEED_UNKNOWN; | |
882 | ndc->duplex = DUPLEX_UNKNOWN; | |
883 | } | |
884 | ||
885 | static int netvsc_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
886 | { | |
887 | struct net_device_context *ndc = netdev_priv(dev); | |
888 | ||
889 | ethtool_cmd_speed_set(cmd, ndc->speed); | |
890 | cmd->duplex = ndc->duplex; | |
891 | cmd->port = PORT_OTHER; | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
896 | static int netvsc_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
897 | { | |
898 | struct net_device_context *ndc = netdev_priv(dev); | |
899 | u32 speed; | |
900 | ||
901 | speed = ethtool_cmd_speed(cmd); | |
902 | if (!ethtool_validate_speed(speed) || | |
903 | !ethtool_validate_duplex(cmd->duplex) || | |
904 | !netvsc_validate_ethtool_ss_cmd(cmd)) | |
905 | return -EINVAL; | |
906 | ||
907 | ndc->speed = speed; | |
908 | ndc->duplex = cmd->duplex; | |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
4d447c9a HZ |
913 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
914 | { | |
915 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
3d541ac5 VK |
916 | struct netvsc_device *nvdev = ndevctx->nvdev; |
917 | struct hv_device *hdev = ndevctx->device_ctx; | |
4d447c9a HZ |
918 | struct netvsc_device_info device_info; |
919 | int limit = ETH_DATA_LEN; | |
d212b463 | 920 | u32 num_chn; |
2de8530b | 921 | int ret = 0; |
4d447c9a | 922 | |
6da7225f | 923 | if (ndevctx->start_remove || !nvdev || nvdev->destroy) |
4d447c9a HZ |
924 | return -ENODEV; |
925 | ||
a1eabb01 | 926 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) |
4d3c9d37 | 927 | limit = NETVSC_MTU - ETH_HLEN; |
4d447c9a | 928 | |
f9cbce34 | 929 | if (mtu < NETVSC_MTU_MIN || mtu > limit) |
4d447c9a HZ |
930 | return -EINVAL; |
931 | ||
2de8530b HZ |
932 | ret = netvsc_close(ndev); |
933 | if (ret) | |
934 | goto out; | |
935 | ||
d212b463 HZ |
936 | num_chn = nvdev->num_chn; |
937 | ||
f580aec4 | 938 | ndevctx->start_remove = true; |
4d447c9a HZ |
939 | rndis_filter_device_remove(hdev); |
940 | ||
941 | ndev->mtu = mtu; | |
942 | ||
8ebdcc52 | 943 | memset(&device_info, 0, sizeof(device_info)); |
4d447c9a | 944 | device_info.ring_size = ring_size; |
d212b463 | 945 | device_info.num_chn = num_chn; |
e01ec219 | 946 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
4d447c9a | 947 | rndis_filter_device_add(hdev, &device_info); |
4d447c9a | 948 | |
2de8530b HZ |
949 | out: |
950 | netvsc_open(ndev); | |
f580aec4 | 951 | ndevctx->start_remove = false; |
2de8530b | 952 | |
1bdcec8a VK |
953 | /* We may have missed link change notifications */ |
954 | schedule_delayed_work(&ndevctx->dwork, 0); | |
955 | ||
2de8530b | 956 | return ret; |
4d447c9a HZ |
957 | } |
958 | ||
7eafd9b4 | 959 | static struct rtnl_link_stats64 *netvsc_get_stats64(struct net_device *net, |
960 | struct rtnl_link_stats64 *t) | |
961 | { | |
962 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
963 | int cpu; | |
964 | ||
965 | for_each_possible_cpu(cpu) { | |
966 | struct netvsc_stats *tx_stats = per_cpu_ptr(ndev_ctx->tx_stats, | |
967 | cpu); | |
968 | struct netvsc_stats *rx_stats = per_cpu_ptr(ndev_ctx->rx_stats, | |
969 | cpu); | |
970 | u64 tx_packets, tx_bytes, rx_packets, rx_bytes; | |
971 | unsigned int start; | |
972 | ||
973 | do { | |
4b02b58b | 974 | start = u64_stats_fetch_begin_irq(&tx_stats->syncp); |
7eafd9b4 | 975 | tx_packets = tx_stats->packets; |
976 | tx_bytes = tx_stats->bytes; | |
4b02b58b | 977 | } while (u64_stats_fetch_retry_irq(&tx_stats->syncp, start)); |
7eafd9b4 | 978 | |
979 | do { | |
4b02b58b | 980 | start = u64_stats_fetch_begin_irq(&rx_stats->syncp); |
7eafd9b4 | 981 | rx_packets = rx_stats->packets; |
982 | rx_bytes = rx_stats->bytes; | |
4b02b58b | 983 | } while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start)); |
7eafd9b4 | 984 | |
985 | t->tx_bytes += tx_bytes; | |
986 | t->tx_packets += tx_packets; | |
987 | t->rx_bytes += rx_bytes; | |
988 | t->rx_packets += rx_packets; | |
989 | } | |
990 | ||
991 | t->tx_dropped = net->stats.tx_dropped; | |
992 | t->tx_errors = net->stats.tx_dropped; | |
993 | ||
994 | t->rx_dropped = net->stats.rx_dropped; | |
995 | t->rx_errors = net->stats.rx_errors; | |
996 | ||
997 | return t; | |
998 | } | |
1ce09e89 HZ |
999 | |
1000 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
1001 | { | |
1ce09e89 | 1002 | struct sockaddr *addr = p; |
9a4c831e | 1003 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
1004 | unsigned char save_aatype; |
1005 | int err; | |
1006 | ||
1007 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
1008 | save_aatype = ndev->addr_assign_type; | |
1009 | ||
1010 | err = eth_mac_addr(ndev, p); | |
1011 | if (err != 0) | |
1012 | return err; | |
1013 | ||
e834da9a | 1014 | err = rndis_filter_set_device_mac(ndev, addr->sa_data); |
1ce09e89 HZ |
1015 | if (err != 0) { |
1016 | /* roll back to saved MAC */ | |
1017 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
1018 | ndev->addr_assign_type = save_aatype; | |
1019 | } | |
1020 | ||
1021 | return err; | |
1022 | } | |
1023 | ||
4323b47c SH |
1024 | static const struct { |
1025 | char name[ETH_GSTRING_LEN]; | |
1026 | u16 offset; | |
1027 | } netvsc_stats[] = { | |
1028 | { "tx_scattered", offsetof(struct netvsc_ethtool_stats, tx_scattered) }, | |
1029 | { "tx_no_memory", offsetof(struct netvsc_ethtool_stats, tx_no_memory) }, | |
1030 | { "tx_no_space", offsetof(struct netvsc_ethtool_stats, tx_no_space) }, | |
1031 | { "tx_too_big", offsetof(struct netvsc_ethtool_stats, tx_too_big) }, | |
1032 | { "tx_busy", offsetof(struct netvsc_ethtool_stats, tx_busy) }, | |
1033 | }; | |
1034 | ||
1035 | static int netvsc_get_sset_count(struct net_device *dev, int string_set) | |
1036 | { | |
1037 | switch (string_set) { | |
1038 | case ETH_SS_STATS: | |
1039 | return ARRAY_SIZE(netvsc_stats); | |
1040 | default: | |
1041 | return -EINVAL; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | static void netvsc_get_ethtool_stats(struct net_device *dev, | |
1046 | struct ethtool_stats *stats, u64 *data) | |
1047 | { | |
1048 | struct net_device_context *ndc = netdev_priv(dev); | |
1049 | const void *nds = &ndc->eth_stats; | |
1050 | int i; | |
1051 | ||
1052 | for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) | |
1053 | data[i] = *(unsigned long *)(nds + netvsc_stats[i].offset); | |
1054 | } | |
1055 | ||
1056 | static void netvsc_get_strings(struct net_device *dev, u32 stringset, u8 *data) | |
1057 | { | |
1058 | int i; | |
1059 | ||
1060 | switch (stringset) { | |
1061 | case ETH_SS_STATS: | |
1062 | for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) | |
1063 | memcpy(data + i * ETH_GSTRING_LEN, | |
1064 | netvsc_stats[i].name, ETH_GSTRING_LEN); | |
1065 | break; | |
1066 | } | |
1067 | } | |
1068 | ||
316158fe RW |
1069 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1070 | static void netvsc_poll_controller(struct net_device *net) | |
1071 | { | |
1072 | /* As netvsc_start_xmit() works synchronous we don't have to | |
1073 | * trigger anything here. | |
1074 | */ | |
1075 | } | |
1076 | #endif | |
1ce09e89 | 1077 | |
f82f4ad7 SH |
1078 | static const struct ethtool_ops ethtool_ops = { |
1079 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 | 1080 | .get_link = ethtool_op_get_link, |
4323b47c SH |
1081 | .get_ethtool_stats = netvsc_get_ethtool_stats, |
1082 | .get_sset_count = netvsc_get_sset_count, | |
1083 | .get_strings = netvsc_get_strings, | |
59995370 | 1084 | .get_channels = netvsc_get_channels, |
b5960e6e | 1085 | .set_channels = netvsc_set_channels, |
76d13b56 | 1086 | .get_ts_info = ethtool_op_get_ts_info, |
49eb9389 | 1087 | .get_settings = netvsc_get_settings, |
1088 | .set_settings = netvsc_set_settings, | |
f82f4ad7 SH |
1089 | }; |
1090 | ||
df2fff28 GKH |
1091 | static const struct net_device_ops device_ops = { |
1092 | .ndo_open = netvsc_open, | |
1093 | .ndo_stop = netvsc_close, | |
1094 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 1095 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 1096 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 1097 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 1098 | .ndo_set_mac_address = netvsc_set_mac_addr, |
5b54dac8 | 1099 | .ndo_select_queue = netvsc_select_queue, |
7eafd9b4 | 1100 | .ndo_get_stats64 = netvsc_get_stats64, |
316158fe RW |
1101 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1102 | .ndo_poll_controller = netvsc_poll_controller, | |
1103 | #endif | |
df2fff28 GKH |
1104 | }; |
1105 | ||
c996edcf | 1106 | /* |
27a70af3 VK |
1107 | * Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link |
1108 | * down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is | |
1109 | * present send GARP packet to network peers with netif_notify_peers(). | |
c996edcf | 1110 | */ |
891de74d | 1111 | static void netvsc_link_change(struct work_struct *w) |
c996edcf | 1112 | { |
0a1275ca VK |
1113 | struct net_device_context *ndev_ctx = |
1114 | container_of(w, struct net_device_context, dwork.work); | |
1115 | struct hv_device *device_obj = ndev_ctx->device_ctx; | |
1116 | struct net_device *net = hv_get_drvdata(device_obj); | |
2ddd5e5f | 1117 | struct netvsc_device *net_device; |
891de74d | 1118 | struct rndis_device *rdev; |
27a70af3 VK |
1119 | struct netvsc_reconfig *event = NULL; |
1120 | bool notify = false, reschedule = false; | |
1121 | unsigned long flags, next_reconfig, delay; | |
c996edcf | 1122 | |
1bdcec8a VK |
1123 | rtnl_lock(); |
1124 | if (ndev_ctx->start_remove) | |
1125 | goto out_unlock; | |
1126 | ||
3d541ac5 | 1127 | net_device = ndev_ctx->nvdev; |
891de74d | 1128 | rdev = net_device->extension; |
891de74d | 1129 | |
27a70af3 VK |
1130 | next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT; |
1131 | if (time_is_after_jiffies(next_reconfig)) { | |
1132 | /* link_watch only sends one notification with current state | |
1133 | * per second, avoid doing reconfig more frequently. Handle | |
1134 | * wrap around. | |
1135 | */ | |
1136 | delay = next_reconfig - jiffies; | |
1137 | delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT; | |
1138 | schedule_delayed_work(&ndev_ctx->dwork, delay); | |
1bdcec8a | 1139 | goto out_unlock; |
27a70af3 VK |
1140 | } |
1141 | ndev_ctx->last_reconfig = jiffies; | |
1142 | ||
1143 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
1144 | if (!list_empty(&ndev_ctx->reconfig_events)) { | |
1145 | event = list_first_entry(&ndev_ctx->reconfig_events, | |
1146 | struct netvsc_reconfig, list); | |
1147 | list_del(&event->list); | |
1148 | reschedule = !list_empty(&ndev_ctx->reconfig_events); | |
1149 | } | |
1150 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
1151 | ||
1152 | if (!event) | |
1bdcec8a | 1153 | goto out_unlock; |
27a70af3 VK |
1154 | |
1155 | switch (event->event) { | |
1156 | /* Only the following events are possible due to the check in | |
1157 | * netvsc_linkstatus_callback() | |
1158 | */ | |
1159 | case RNDIS_STATUS_MEDIA_CONNECT: | |
1160 | if (rdev->link_state) { | |
1161 | rdev->link_state = false; | |
1162 | netif_carrier_on(net); | |
1163 | netif_tx_wake_all_queues(net); | |
1164 | } else { | |
1165 | notify = true; | |
1166 | } | |
1167 | kfree(event); | |
1168 | break; | |
1169 | case RNDIS_STATUS_MEDIA_DISCONNECT: | |
1170 | if (!rdev->link_state) { | |
1171 | rdev->link_state = true; | |
1172 | netif_carrier_off(net); | |
1173 | netif_tx_stop_all_queues(net); | |
1174 | } | |
1175 | kfree(event); | |
1176 | break; | |
1177 | case RNDIS_STATUS_NETWORK_CHANGE: | |
1178 | /* Only makes sense if carrier is present */ | |
1179 | if (!rdev->link_state) { | |
1180 | rdev->link_state = true; | |
1181 | netif_carrier_off(net); | |
1182 | netif_tx_stop_all_queues(net); | |
1183 | event->event = RNDIS_STATUS_MEDIA_CONNECT; | |
1184 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
15cfd407 | 1185 | list_add(&event->list, &ndev_ctx->reconfig_events); |
27a70af3 VK |
1186 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
1187 | reschedule = true; | |
3a494e71 | 1188 | } |
27a70af3 | 1189 | break; |
891de74d HZ |
1190 | } |
1191 | ||
1192 | rtnl_unlock(); | |
1193 | ||
1194 | if (notify) | |
1195 | netdev_notify_peers(net); | |
27a70af3 VK |
1196 | |
1197 | /* link_watch only sends one notification with current state per | |
1198 | * second, handle next reconfig event in 2 seconds. | |
1199 | */ | |
1200 | if (reschedule) | |
1201 | schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); | |
1bdcec8a VK |
1202 | |
1203 | return; | |
1204 | ||
1205 | out_unlock: | |
1206 | rtnl_unlock(); | |
c996edcf HZ |
1207 | } |
1208 | ||
7eafd9b4 | 1209 | static void netvsc_free_netdev(struct net_device *netdev) |
1210 | { | |
1211 | struct net_device_context *net_device_ctx = netdev_priv(netdev); | |
1212 | ||
1213 | free_percpu(net_device_ctx->tx_stats); | |
1214 | free_percpu(net_device_ctx->rx_stats); | |
1215 | free_netdev(netdev); | |
1216 | } | |
c996edcf | 1217 | |
0a1275ca | 1218 | static struct net_device *get_netvsc_net_device(char *mac) |
84bf9cef | 1219 | { |
0a1275ca | 1220 | struct net_device *dev, *found = NULL; |
84bf9cef | 1221 | |
8737caaf | 1222 | ASSERT_RTNL(); |
84bf9cef KS |
1223 | |
1224 | for_each_netdev(&init_net, dev) { | |
1225 | if (memcmp(dev->dev_addr, mac, ETH_ALEN) == 0) { | |
1226 | if (dev->netdev_ops != &device_ops) | |
1227 | continue; | |
0a1275ca | 1228 | found = dev; |
84bf9cef KS |
1229 | break; |
1230 | } | |
1231 | } | |
84bf9cef | 1232 | |
0a1275ca | 1233 | return found; |
84bf9cef KS |
1234 | } |
1235 | ||
1236 | static int netvsc_register_vf(struct net_device *vf_netdev) | |
1237 | { | |
0a1275ca VK |
1238 | struct net_device *ndev; |
1239 | struct net_device_context *net_device_ctx; | |
84bf9cef KS |
1240 | struct netvsc_device *netvsc_dev; |
1241 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
1242 | ||
1243 | if (eth_ops == NULL || eth_ops == ðtool_ops) | |
1244 | return NOTIFY_DONE; | |
1245 | ||
1246 | /* | |
1247 | * We will use the MAC address to locate the synthetic interface to | |
1248 | * associate with the VF interface. If we don't find a matching | |
1249 | * synthetic interface, move on. | |
1250 | */ | |
0a1275ca VK |
1251 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1252 | if (!ndev) | |
1253 | return NOTIFY_DONE; | |
1254 | ||
1255 | net_device_ctx = netdev_priv(ndev); | |
1256 | netvsc_dev = net_device_ctx->nvdev; | |
0f20d795 | 1257 | if (!netvsc_dev || net_device_ctx->vf_netdev) |
84bf9cef KS |
1258 | return NOTIFY_DONE; |
1259 | ||
0a1275ca | 1260 | netdev_info(ndev, "VF registering: %s\n", vf_netdev->name); |
84bf9cef KS |
1261 | /* |
1262 | * Take a reference on the module. | |
1263 | */ | |
1264 | try_module_get(THIS_MODULE); | |
f9a7da91 | 1265 | net_device_ctx->vf_netdev = vf_netdev; |
84bf9cef KS |
1266 | return NOTIFY_OK; |
1267 | } | |
1268 | ||
57c1826b VK |
1269 | static void netvsc_inject_enable(struct net_device_context *net_device_ctx) |
1270 | { | |
1271 | net_device_ctx->vf_inject = true; | |
1272 | } | |
1273 | ||
1274 | static void netvsc_inject_disable(struct net_device_context *net_device_ctx) | |
1275 | { | |
1276 | net_device_ctx->vf_inject = false; | |
1277 | ||
1278 | /* Wait for currently active users to drain out. */ | |
1279 | while (atomic_read(&net_device_ctx->vf_use_cnt) != 0) | |
1280 | udelay(50); | |
1281 | } | |
84bf9cef KS |
1282 | |
1283 | static int netvsc_vf_up(struct net_device *vf_netdev) | |
1284 | { | |
0a1275ca | 1285 | struct net_device *ndev; |
84bf9cef KS |
1286 | struct netvsc_device *netvsc_dev; |
1287 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
1288 | struct net_device_context *net_device_ctx; | |
1289 | ||
1290 | if (eth_ops == ðtool_ops) | |
1291 | return NOTIFY_DONE; | |
1292 | ||
0a1275ca VK |
1293 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1294 | if (!ndev) | |
1295 | return NOTIFY_DONE; | |
1296 | ||
1297 | net_device_ctx = netdev_priv(ndev); | |
1298 | netvsc_dev = net_device_ctx->nvdev; | |
84bf9cef | 1299 | |
f9a7da91 | 1300 | if (!netvsc_dev || !net_device_ctx->vf_netdev) |
84bf9cef KS |
1301 | return NOTIFY_DONE; |
1302 | ||
0a1275ca | 1303 | netdev_info(ndev, "VF up: %s\n", vf_netdev->name); |
57c1826b | 1304 | netvsc_inject_enable(net_device_ctx); |
84bf9cef KS |
1305 | |
1306 | /* | |
1307 | * Open the device before switching data path. | |
1308 | */ | |
2f5fa6c8 | 1309 | rndis_filter_open(netvsc_dev); |
84bf9cef KS |
1310 | |
1311 | /* | |
1312 | * notify the host to switch the data path. | |
1313 | */ | |
0a1275ca VK |
1314 | netvsc_switch_datapath(ndev, true); |
1315 | netdev_info(ndev, "Data path switched to VF: %s\n", vf_netdev->name); | |
84bf9cef | 1316 | |
0a1275ca | 1317 | netif_carrier_off(ndev); |
84bf9cef | 1318 | |
d072218f VK |
1319 | /* Now notify peers through VF device. */ |
1320 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, vf_netdev); | |
84bf9cef KS |
1321 | |
1322 | return NOTIFY_OK; | |
1323 | } | |
1324 | ||
84bf9cef KS |
1325 | static int netvsc_vf_down(struct net_device *vf_netdev) |
1326 | { | |
0a1275ca | 1327 | struct net_device *ndev; |
84bf9cef KS |
1328 | struct netvsc_device *netvsc_dev; |
1329 | struct net_device_context *net_device_ctx; | |
1330 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
1331 | ||
1332 | if (eth_ops == ðtool_ops) | |
1333 | return NOTIFY_DONE; | |
1334 | ||
0a1275ca VK |
1335 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1336 | if (!ndev) | |
1337 | return NOTIFY_DONE; | |
1338 | ||
1339 | net_device_ctx = netdev_priv(ndev); | |
1340 | netvsc_dev = net_device_ctx->nvdev; | |
84bf9cef | 1341 | |
f9a7da91 | 1342 | if (!netvsc_dev || !net_device_ctx->vf_netdev) |
84bf9cef KS |
1343 | return NOTIFY_DONE; |
1344 | ||
0a1275ca | 1345 | netdev_info(ndev, "VF down: %s\n", vf_netdev->name); |
57c1826b | 1346 | netvsc_inject_disable(net_device_ctx); |
0a1275ca VK |
1347 | netvsc_switch_datapath(ndev, false); |
1348 | netdev_info(ndev, "Data path switched from VF: %s\n", vf_netdev->name); | |
2f5fa6c8 | 1349 | rndis_filter_close(netvsc_dev); |
0a1275ca | 1350 | netif_carrier_on(ndev); |
d072218f VK |
1351 | |
1352 | /* Now notify peers through netvsc device. */ | |
1353 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, ndev); | |
84bf9cef KS |
1354 | |
1355 | return NOTIFY_OK; | |
1356 | } | |
1357 | ||
84bf9cef KS |
1358 | static int netvsc_unregister_vf(struct net_device *vf_netdev) |
1359 | { | |
0a1275ca | 1360 | struct net_device *ndev; |
84bf9cef KS |
1361 | struct netvsc_device *netvsc_dev; |
1362 | const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; | |
0a1275ca | 1363 | struct net_device_context *net_device_ctx; |
84bf9cef KS |
1364 | |
1365 | if (eth_ops == ðtool_ops) | |
1366 | return NOTIFY_DONE; | |
1367 | ||
0a1275ca VK |
1368 | ndev = get_netvsc_net_device(vf_netdev->dev_addr); |
1369 | if (!ndev) | |
1370 | return NOTIFY_DONE; | |
1371 | ||
1372 | net_device_ctx = netdev_priv(ndev); | |
1373 | netvsc_dev = net_device_ctx->nvdev; | |
0f20d795 | 1374 | if (!netvsc_dev || !net_device_ctx->vf_netdev) |
84bf9cef | 1375 | return NOTIFY_DONE; |
0a1275ca | 1376 | netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); |
57c1826b | 1377 | netvsc_inject_disable(net_device_ctx); |
f9a7da91 | 1378 | net_device_ctx->vf_netdev = NULL; |
84bf9cef KS |
1379 | module_put(THIS_MODULE); |
1380 | return NOTIFY_OK; | |
1381 | } | |
1382 | ||
84946899 S |
1383 | static int netvsc_probe(struct hv_device *dev, |
1384 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 1385 | { |
df2fff28 GKH |
1386 | struct net_device *net = NULL; |
1387 | struct net_device_context *net_device_ctx; | |
1388 | struct netvsc_device_info device_info; | |
5b54dac8 | 1389 | struct netvsc_device *nvdev; |
df2fff28 GKH |
1390 | int ret; |
1391 | ||
5b54dac8 HZ |
1392 | net = alloc_etherdev_mq(sizeof(struct net_device_context), |
1393 | num_online_cpus()); | |
df2fff28 | 1394 | if (!net) |
51a805d0 | 1395 | return -ENOMEM; |
df2fff28 | 1396 | |
1b07da51 HZ |
1397 | netif_carrier_off(net); |
1398 | ||
b37879e6 HZ |
1399 | netvsc_init_settings(net); |
1400 | ||
df2fff28 | 1401 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 1402 | net_device_ctx->device_ctx = dev; |
3f300ff4 SX |
1403 | net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); |
1404 | if (netif_msg_probe(net_device_ctx)) | |
1405 | netdev_dbg(net, "netvsc msg_enable: %d\n", | |
1406 | net_device_ctx->msg_enable); | |
1407 | ||
7eafd9b4 | 1408 | net_device_ctx->tx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); |
1409 | if (!net_device_ctx->tx_stats) { | |
1410 | free_netdev(net); | |
1411 | return -ENOMEM; | |
1412 | } | |
1413 | net_device_ctx->rx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); | |
1414 | if (!net_device_ctx->rx_stats) { | |
1415 | free_percpu(net_device_ctx->tx_stats); | |
1416 | free_netdev(net); | |
1417 | return -ENOMEM; | |
1418 | } | |
1419 | ||
2ddd5e5f | 1420 | hv_set_drvdata(dev, net); |
f580aec4 VK |
1421 | |
1422 | net_device_ctx->start_remove = false; | |
1423 | ||
891de74d | 1424 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
792df872 | 1425 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
df2fff28 | 1426 | |
27a70af3 VK |
1427 | spin_lock_init(&net_device_ctx->lock); |
1428 | INIT_LIST_HEAD(&net_device_ctx->reconfig_events); | |
1429 | ||
f9a7da91 VK |
1430 | atomic_set(&net_device_ctx->vf_use_cnt, 0); |
1431 | net_device_ctx->vf_netdev = NULL; | |
1432 | net_device_ctx->vf_inject = false; | |
1433 | ||
df2fff28 GKH |
1434 | net->netdev_ops = &device_ops; |
1435 | ||
a060679c | 1436 | net->hw_features = NETVSC_HW_FEATURES; |
1437 | net->features = NETVSC_HW_FEATURES | NETIF_F_HW_VLAN_CTAG_TX; | |
6048718d | 1438 | |
7ad24ea4 | 1439 | net->ethtool_ops = ðtool_ops; |
9efd21e1 | 1440 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 1441 | |
14a03cf8 VK |
1442 | /* We always need headroom for rndis header */ |
1443 | net->needed_headroom = RNDIS_AND_PPI_SIZE; | |
1444 | ||
692e084e | 1445 | /* Notify the netvsc driver of the new device */ |
8ebdcc52 | 1446 | memset(&device_info, 0, sizeof(device_info)); |
692e084e | 1447 | device_info.ring_size = ring_size; |
e01ec219 | 1448 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
692e084e HZ |
1449 | ret = rndis_filter_device_add(dev, &device_info); |
1450 | if (ret != 0) { | |
1451 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
7eafd9b4 | 1452 | netvsc_free_netdev(net); |
2ddd5e5f | 1453 | hv_set_drvdata(dev, NULL); |
692e084e | 1454 | return ret; |
df2fff28 | 1455 | } |
692e084e HZ |
1456 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
1457 | ||
3d541ac5 | 1458 | nvdev = net_device_ctx->nvdev; |
5b54dac8 HZ |
1459 | netif_set_real_num_tx_queues(net, nvdev->num_chn); |
1460 | netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
5b54dac8 | 1461 | |
a68f9614 HZ |
1462 | ret = register_netdev(net); |
1463 | if (ret != 0) { | |
1464 | pr_err("Unable to register netdev.\n"); | |
1465 | rndis_filter_device_remove(dev); | |
7eafd9b4 | 1466 | netvsc_free_netdev(net); |
a68f9614 HZ |
1467 | } |
1468 | ||
df2fff28 GKH |
1469 | return ret; |
1470 | } | |
1471 | ||
415b023a | 1472 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 1473 | { |
2ddd5e5f | 1474 | struct net_device *net; |
122a5f64 | 1475 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
1476 | struct netvsc_device *net_device; |
1477 | ||
3d541ac5 | 1478 | net = hv_get_drvdata(dev); |
df2fff28 | 1479 | |
df2fff28 | 1480 | if (net == NULL) { |
415b023a | 1481 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
1482 | return 0; |
1483 | } | |
1484 | ||
122a5f64 | 1485 | ndev_ctx = netdev_priv(net); |
3d541ac5 VK |
1486 | net_device = ndev_ctx->nvdev; |
1487 | ||
6da7225f VK |
1488 | /* Avoid racing with netvsc_change_mtu()/netvsc_set_channels() |
1489 | * removing the device. | |
1490 | */ | |
1491 | rtnl_lock(); | |
f580aec4 | 1492 | ndev_ctx->start_remove = true; |
6da7225f | 1493 | rtnl_unlock(); |
f580aec4 | 1494 | |
122a5f64 | 1495 | cancel_delayed_work_sync(&ndev_ctx->dwork); |
792df872 | 1496 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 1497 | |
df2fff28 | 1498 | /* Stop outbound asap */ |
0a282538 | 1499 | netif_tx_disable(net); |
df2fff28 GKH |
1500 | |
1501 | unregister_netdev(net); | |
1502 | ||
1503 | /* | |
1504 | * Call to the vsc driver to let it know that the device is being | |
1505 | * removed | |
1506 | */ | |
df06bcff | 1507 | rndis_filter_device_remove(dev); |
df2fff28 | 1508 | |
3d541ac5 VK |
1509 | hv_set_drvdata(dev, NULL); |
1510 | ||
7eafd9b4 | 1511 | netvsc_free_netdev(net); |
df06bcff | 1512 | return 0; |
df2fff28 GKH |
1513 | } |
1514 | ||
345c4cc3 | 1515 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 1516 | /* Network guid */ |
8f505944 | 1517 | { HV_NIC_GUID, }, |
c45cf2d4 | 1518 | { }, |
345c4cc3 S |
1519 | }; |
1520 | ||
1521 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
1522 | ||
f1542a66 | 1523 | /* The one and only one */ |
fde0ef9b | 1524 | static struct hv_driver netvsc_drv = { |
d31b20fc | 1525 | .name = KBUILD_MODNAME, |
345c4cc3 | 1526 | .id_table = id_table, |
fde0ef9b S |
1527 | .probe = netvsc_probe, |
1528 | .remove = netvsc_remove, | |
d4890970 | 1529 | }; |
f1542a66 | 1530 | |
84bf9cef KS |
1531 | /* |
1532 | * On Hyper-V, every VF interface is matched with a corresponding | |
1533 | * synthetic interface. The synthetic interface is presented first | |
1534 | * to the guest. When the corresponding VF instance is registered, | |
1535 | * we will take care of switching the data path. | |
1536 | */ | |
1537 | static int netvsc_netdev_event(struct notifier_block *this, | |
1538 | unsigned long event, void *ptr) | |
1539 | { | |
1540 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); | |
1541 | ||
0dbff144 VK |
1542 | /* Avoid Vlan dev with same MAC registering as VF */ |
1543 | if (event_dev->priv_flags & IFF_802_1Q_VLAN) | |
1544 | return NOTIFY_DONE; | |
1545 | ||
1546 | /* Avoid Bonding master dev with same MAC registering as VF */ | |
1547 | if (event_dev->priv_flags & IFF_BONDING && | |
1548 | event_dev->flags & IFF_MASTER) | |
cb2911fe HZ |
1549 | return NOTIFY_DONE; |
1550 | ||
84bf9cef KS |
1551 | switch (event) { |
1552 | case NETDEV_REGISTER: | |
1553 | return netvsc_register_vf(event_dev); | |
1554 | case NETDEV_UNREGISTER: | |
1555 | return netvsc_unregister_vf(event_dev); | |
1556 | case NETDEV_UP: | |
1557 | return netvsc_vf_up(event_dev); | |
1558 | case NETDEV_DOWN: | |
1559 | return netvsc_vf_down(event_dev); | |
1560 | default: | |
1561 | return NOTIFY_DONE; | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | static struct notifier_block netvsc_netdev_notifier = { | |
1566 | .notifier_call = netvsc_netdev_event, | |
1567 | }; | |
1568 | ||
a9869c94 | 1569 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 1570 | { |
84bf9cef | 1571 | unregister_netdevice_notifier(&netvsc_netdev_notifier); |
768fa219 | 1572 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
1573 | } |
1574 | ||
1fde28cf | 1575 | static int __init netvsc_drv_init(void) |
df2fff28 | 1576 | { |
84bf9cef KS |
1577 | int ret; |
1578 | ||
fa85a6c2 HZ |
1579 | if (ring_size < RING_SIZE_MIN) { |
1580 | ring_size = RING_SIZE_MIN; | |
1581 | pr_info("Increased ring_size to %d (min allowed)\n", | |
1582 | ring_size); | |
1583 | } | |
84bf9cef KS |
1584 | ret = vmbus_driver_register(&netvsc_drv); |
1585 | ||
1586 | if (ret) | |
1587 | return ret; | |
1588 | ||
1589 | register_netdevice_notifier(&netvsc_netdev_notifier); | |
1590 | return 0; | |
df2fff28 GKH |
1591 | } |
1592 | ||
26c14cc1 | 1593 | MODULE_LICENSE("GPL"); |
7880fc54 | 1594 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 1595 | |
1fde28cf | 1596 | module_init(netvsc_drv_init); |
a9869c94 | 1597 | module_exit(netvsc_drv_exit); |