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Commit | Line | Data |
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fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
adf8d3ff | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
fceaf24a HJ |
15 | * |
16 | * Authors: | |
d0e94d17 | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
fceaf24a | 18 | * Hank Janssen <hjanssen@microsoft.com> |
fceaf24a | 19 | */ |
eb335bc4 HJ |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
fceaf24a | 22 | #include <linux/init.h> |
9079ce69 | 23 | #include <linux/atomic.h> |
fceaf24a HJ |
24 | #include <linux/module.h> |
25 | #include <linux/highmem.h> | |
26 | #include <linux/device.h> | |
fceaf24a | 27 | #include <linux/io.h> |
fceaf24a HJ |
28 | #include <linux/delay.h> |
29 | #include <linux/netdevice.h> | |
30 | #include <linux/inetdevice.h> | |
31 | #include <linux/etherdevice.h> | |
32 | #include <linux/skbuff.h> | |
c802db11 | 33 | #include <linux/if_vlan.h> |
fceaf24a | 34 | #include <linux/in.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
fceaf24a HJ |
36 | #include <net/arp.h> |
37 | #include <net/route.h> | |
38 | #include <net/sock.h> | |
39 | #include <net/pkt_sched.h> | |
3f335ea2 | 40 | |
5ca7252a | 41 | #include "hyperv_net.h" |
fceaf24a | 42 | |
fceaf24a | 43 | |
fa85a6c2 | 44 | #define RING_SIZE_MIN 64 |
27a70af3 | 45 | #define LINKCHANGE_INT (2 * HZ) |
99c8da0f | 46 | static int ring_size = 128; |
450d7a4b SH |
47 | module_param(ring_size, int, S_IRUGO); |
48 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); | |
fceaf24a | 49 | |
e01ec219 KS |
50 | static int max_num_vrss_chns = 8; |
51 | ||
3f300ff4 SX |
52 | static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | |
53 | NETIF_MSG_LINK | NETIF_MSG_IFUP | | |
54 | NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | | |
55 | NETIF_MSG_TX_ERR; | |
56 | ||
57 | static int debug = -1; | |
58 | module_param(debug, int, S_IRUGO); | |
59 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
60 | ||
d426b2e3 HZ |
61 | static void do_set_multicast(struct work_struct *w) |
62 | { | |
792df872 WM |
63 | struct net_device_context *ndevctx = |
64 | container_of(w, struct net_device_context, work); | |
d426b2e3 HZ |
65 | struct netvsc_device *nvdev; |
66 | struct rndis_device *rdev; | |
67 | ||
68 | nvdev = hv_get_drvdata(ndevctx->device_ctx); | |
792df872 WM |
69 | if (nvdev == NULL || nvdev->ndev == NULL) |
70 | return; | |
d426b2e3 HZ |
71 | |
72 | rdev = nvdev->extension; | |
73 | if (rdev == NULL) | |
792df872 | 74 | return; |
d426b2e3 | 75 | |
792df872 | 76 | if (nvdev->ndev->flags & IFF_PROMISC) |
d426b2e3 HZ |
77 | rndis_filter_set_packet_filter(rdev, |
78 | NDIS_PACKET_TYPE_PROMISCUOUS); | |
79 | else | |
80 | rndis_filter_set_packet_filter(rdev, | |
81 | NDIS_PACKET_TYPE_BROADCAST | | |
82 | NDIS_PACKET_TYPE_ALL_MULTICAST | | |
83 | NDIS_PACKET_TYPE_DIRECTED); | |
d426b2e3 HZ |
84 | } |
85 | ||
4e9bfefa | 86 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a | 87 | { |
792df872 | 88 | struct net_device_context *net_device_ctx = netdev_priv(net); |
d426b2e3 | 89 | |
792df872 | 90 | schedule_work(&net_device_ctx->work); |
fceaf24a HJ |
91 | } |
92 | ||
fceaf24a HJ |
93 | static int netvsc_open(struct net_device *net) |
94 | { | |
fceaf24a | 95 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 96 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
891de74d HZ |
97 | struct netvsc_device *nvdev; |
98 | struct rndis_device *rdev; | |
02fafbc6 | 99 | int ret = 0; |
fceaf24a | 100 | |
891de74d HZ |
101 | netif_carrier_off(net); |
102 | ||
d515d0ff HZ |
103 | /* Open up the device */ |
104 | ret = rndis_filter_open(device_obj); | |
105 | if (ret != 0) { | |
106 | netdev_err(net, "unable to open device (ret %d).\n", ret); | |
107 | return ret; | |
fceaf24a HJ |
108 | } |
109 | ||
2de8530b | 110 | netif_tx_wake_all_queues(net); |
d515d0ff | 111 | |
891de74d HZ |
112 | nvdev = hv_get_drvdata(device_obj); |
113 | rdev = nvdev->extension; | |
114 | if (!rdev->link_state) | |
115 | netif_carrier_on(net); | |
116 | ||
fceaf24a HJ |
117 | return ret; |
118 | } | |
119 | ||
fceaf24a HJ |
120 | static int netvsc_close(struct net_device *net) |
121 | { | |
fceaf24a | 122 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 123 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
2de8530b | 124 | struct netvsc_device *nvdev = hv_get_drvdata(device_obj); |
02fafbc6 | 125 | int ret; |
2de8530b HZ |
126 | u32 aread, awrite, i, msec = 10, retry = 0, retry_max = 20; |
127 | struct vmbus_channel *chn; | |
fceaf24a | 128 | |
0a282538 | 129 | netif_tx_disable(net); |
fceaf24a | 130 | |
792df872 WM |
131 | /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */ |
132 | cancel_work_sync(&net_device_ctx->work); | |
9c26aa0d | 133 | ret = rndis_filter_close(device_obj); |
2de8530b | 134 | if (ret != 0) { |
eb335bc4 | 135 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
2de8530b HZ |
136 | return ret; |
137 | } | |
138 | ||
139 | /* Ensure pending bytes in ring are read */ | |
140 | while (true) { | |
141 | aread = 0; | |
142 | for (i = 0; i < nvdev->num_chn; i++) { | |
143 | chn = nvdev->chn_table[i]; | |
144 | if (!chn) | |
145 | continue; | |
146 | ||
147 | hv_get_ringbuffer_availbytes(&chn->inbound, &aread, | |
148 | &awrite); | |
149 | ||
150 | if (aread) | |
151 | break; | |
152 | ||
153 | hv_get_ringbuffer_availbytes(&chn->outbound, &aread, | |
154 | &awrite); | |
155 | ||
156 | if (aread) | |
157 | break; | |
158 | } | |
159 | ||
160 | retry++; | |
161 | if (retry > retry_max || aread == 0) | |
162 | break; | |
163 | ||
164 | msleep(msec); | |
165 | ||
166 | if (msec < 1000) | |
167 | msec *= 2; | |
168 | } | |
169 | ||
170 | if (aread) { | |
171 | netdev_err(net, "Ring buffer not empty after closing rndis\n"); | |
172 | ret = -ETIMEDOUT; | |
173 | } | |
fceaf24a | 174 | |
fceaf24a HJ |
175 | return ret; |
176 | } | |
177 | ||
8a00251a KS |
178 | static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size, |
179 | int pkt_type) | |
180 | { | |
181 | struct rndis_packet *rndis_pkt; | |
182 | struct rndis_per_packet_info *ppi; | |
183 | ||
184 | rndis_pkt = &msg->msg.pkt; | |
185 | rndis_pkt->data_offset += ppi_size; | |
186 | ||
187 | ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt + | |
188 | rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len); | |
189 | ||
190 | ppi->size = ppi_size; | |
191 | ppi->type = pkt_type; | |
192 | ppi->ppi_offset = sizeof(struct rndis_per_packet_info); | |
193 | ||
194 | rndis_pkt->per_pkt_info_len += ppi_size; | |
195 | ||
196 | return ppi; | |
197 | } | |
198 | ||
5b54dac8 HZ |
199 | union sub_key { |
200 | u64 k; | |
201 | struct { | |
202 | u8 pad[3]; | |
203 | u8 kb; | |
204 | u32 ka; | |
205 | }; | |
206 | }; | |
207 | ||
208 | /* Toeplitz hash function | |
209 | * data: network byte order | |
210 | * return: host byte order | |
211 | */ | |
f88e6714 | 212 | static u32 comp_hash(u8 *key, int klen, void *data, int dlen) |
5b54dac8 HZ |
213 | { |
214 | union sub_key subk; | |
215 | int k_next = 4; | |
216 | u8 dt; | |
217 | int i, j; | |
218 | u32 ret = 0; | |
219 | ||
220 | subk.k = 0; | |
221 | subk.ka = ntohl(*(u32 *)key); | |
222 | ||
223 | for (i = 0; i < dlen; i++) { | |
224 | subk.kb = key[k_next]; | |
225 | k_next = (k_next + 1) % klen; | |
f88e6714 | 226 | dt = ((u8 *)data)[i]; |
5b54dac8 HZ |
227 | for (j = 0; j < 8; j++) { |
228 | if (dt & 0x80) | |
229 | ret ^= subk.ka; | |
230 | dt <<= 1; | |
231 | subk.k <<= 1; | |
232 | } | |
233 | } | |
234 | ||
235 | return ret; | |
236 | } | |
237 | ||
238 | static bool netvsc_set_hash(u32 *hash, struct sk_buff *skb) | |
239 | { | |
f88e6714 | 240 | struct flow_keys flow; |
5b54dac8 | 241 | int data_len; |
5b54dac8 | 242 | |
cd79a238 | 243 | if (!skb_flow_dissect_flow_keys(skb, &flow, 0) || |
06635a35 JP |
244 | !(flow.basic.n_proto == htons(ETH_P_IP) || |
245 | flow.basic.n_proto == htons(ETH_P_IPV6))) | |
5b54dac8 HZ |
246 | return false; |
247 | ||
06635a35 | 248 | if (flow.basic.ip_proto == IPPROTO_TCP) |
f88e6714 HZ |
249 | data_len = 12; |
250 | else | |
251 | data_len = 8; | |
5b54dac8 | 252 | |
f88e6714 | 253 | *hash = comp_hash(netvsc_hash_key, HASH_KEYLEN, &flow, data_len); |
5b54dac8 | 254 | |
f88e6714 | 255 | return true; |
5b54dac8 HZ |
256 | } |
257 | ||
258 | static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, | |
259 | void *accel_priv, select_queue_fallback_t fallback) | |
260 | { | |
261 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
262 | struct hv_device *hdev = net_device_ctx->device_ctx; | |
263 | struct netvsc_device *nvsc_dev = hv_get_drvdata(hdev); | |
264 | u32 hash; | |
265 | u16 q_idx = 0; | |
266 | ||
267 | if (nvsc_dev == NULL || ndev->real_num_tx_queues <= 1) | |
268 | return 0; | |
269 | ||
307f0995 | 270 | if (netvsc_set_hash(&hash, skb)) { |
5b54dac8 HZ |
271 | q_idx = nvsc_dev->send_table[hash % VRSS_SEND_TAB_SIZE] % |
272 | ndev->real_num_tx_queues; | |
307f0995 HZ |
273 | skb_set_hash(skb, hash, PKT_HASH_TYPE_L3); |
274 | } | |
5b54dac8 | 275 | |
8b9fbe1a VK |
276 | if (!nvsc_dev->chn_table[q_idx]) |
277 | q_idx = 0; | |
278 | ||
5b54dac8 HZ |
279 | return q_idx; |
280 | } | |
281 | ||
54a7357f KS |
282 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
283 | struct hv_page_buffer *pb) | |
284 | { | |
285 | int j = 0; | |
286 | ||
287 | /* Deal with compund pages by ignoring unused part | |
288 | * of the page. | |
289 | */ | |
290 | page += (offset >> PAGE_SHIFT); | |
291 | offset &= ~PAGE_MASK; | |
292 | ||
293 | while (len > 0) { | |
294 | unsigned long bytes; | |
295 | ||
296 | bytes = PAGE_SIZE - offset; | |
297 | if (bytes > len) | |
298 | bytes = len; | |
299 | pb[j].pfn = page_to_pfn(page); | |
300 | pb[j].offset = offset; | |
301 | pb[j].len = bytes; | |
302 | ||
303 | offset += bytes; | |
304 | len -= bytes; | |
305 | ||
306 | if (offset == PAGE_SIZE && len) { | |
307 | page++; | |
308 | offset = 0; | |
309 | j++; | |
310 | } | |
311 | } | |
312 | ||
313 | return j + 1; | |
314 | } | |
315 | ||
8a00251a | 316 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
a9f2e2d6 KS |
317 | struct hv_netvsc_packet *packet, |
318 | struct hv_page_buffer **page_buf) | |
54a7357f | 319 | { |
a9f2e2d6 | 320 | struct hv_page_buffer *pb = *page_buf; |
54a7357f KS |
321 | u32 slots_used = 0; |
322 | char *data = skb->data; | |
323 | int frags = skb_shinfo(skb)->nr_frags; | |
324 | int i; | |
325 | ||
326 | /* The packet is laid out thus: | |
aa0a34be | 327 | * 1. hdr: RNDIS header and PPI |
54a7357f KS |
328 | * 2. skb linear data |
329 | * 3. skb fragment data | |
330 | */ | |
331 | if (hdr != NULL) | |
332 | slots_used += fill_pg_buf(virt_to_page(hdr), | |
333 | offset_in_page(hdr), | |
334 | len, &pb[slots_used]); | |
335 | ||
aa0a34be HZ |
336 | packet->rmsg_size = len; |
337 | packet->rmsg_pgcnt = slots_used; | |
338 | ||
54a7357f KS |
339 | slots_used += fill_pg_buf(virt_to_page(data), |
340 | offset_in_page(data), | |
341 | skb_headlen(skb), &pb[slots_used]); | |
342 | ||
343 | for (i = 0; i < frags; i++) { | |
344 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
345 | ||
346 | slots_used += fill_pg_buf(skb_frag_page(frag), | |
347 | frag->page_offset, | |
348 | skb_frag_size(frag), &pb[slots_used]); | |
349 | } | |
8a00251a | 350 | return slots_used; |
54a7357f KS |
351 | } |
352 | ||
353 | static int count_skb_frag_slots(struct sk_buff *skb) | |
354 | { | |
355 | int i, frags = skb_shinfo(skb)->nr_frags; | |
356 | int pages = 0; | |
357 | ||
358 | for (i = 0; i < frags; i++) { | |
359 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
360 | unsigned long size = skb_frag_size(frag); | |
361 | unsigned long offset = frag->page_offset; | |
362 | ||
363 | /* Skip unused frames from start of page */ | |
364 | offset &= ~PAGE_MASK; | |
365 | pages += PFN_UP(offset + size); | |
366 | } | |
367 | return pages; | |
368 | } | |
369 | ||
370 | static int netvsc_get_slots(struct sk_buff *skb) | |
371 | { | |
372 | char *data = skb->data; | |
373 | unsigned int offset = offset_in_page(data); | |
374 | unsigned int len = skb_headlen(skb); | |
375 | int slots; | |
376 | int frag_slots; | |
377 | ||
378 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); | |
379 | frag_slots = count_skb_frag_slots(skb); | |
380 | return slots + frag_slots; | |
381 | } | |
382 | ||
08cd04bf KS |
383 | static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off) |
384 | { | |
385 | u32 ret_val = TRANSPORT_INFO_NOT_IP; | |
386 | ||
387 | if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) && | |
388 | (eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) { | |
389 | goto not_ip; | |
390 | } | |
391 | ||
392 | *trans_off = skb_transport_offset(skb); | |
393 | ||
394 | if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) { | |
395 | struct iphdr *iphdr = ip_hdr(skb); | |
396 | ||
397 | if (iphdr->protocol == IPPROTO_TCP) | |
398 | ret_val = TRANSPORT_INFO_IPV4_TCP; | |
399 | else if (iphdr->protocol == IPPROTO_UDP) | |
400 | ret_val = TRANSPORT_INFO_IPV4_UDP; | |
401 | } else { | |
402 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) | |
403 | ret_val = TRANSPORT_INFO_IPV6_TCP; | |
404 | else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) | |
405 | ret_val = TRANSPORT_INFO_IPV6_UDP; | |
406 | } | |
407 | ||
408 | not_ip: | |
409 | return ret_val; | |
410 | } | |
411 | ||
02fafbc6 | 412 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 413 | { |
fceaf24a | 414 | struct net_device_context *net_device_ctx = netdev_priv(net); |
981a1bd8 | 415 | struct hv_netvsc_packet *packet = NULL; |
02fafbc6 | 416 | int ret; |
8a00251a KS |
417 | unsigned int num_data_pgs; |
418 | struct rndis_message *rndis_msg; | |
419 | struct rndis_packet *rndis_pkt; | |
420 | u32 rndis_msg_size; | |
421 | bool isvlan; | |
e88f7e07 | 422 | bool linear = false; |
8a00251a | 423 | struct rndis_per_packet_info *ppi; |
08cd04bf | 424 | struct ndis_tcp_ip_checksum_info *csum_info; |
77bf5487 | 425 | struct ndis_tcp_lso_info *lso_info; |
08cd04bf KS |
426 | int hdr_offset; |
427 | u32 net_trans_info; | |
307f0995 | 428 | u32 hash; |
e88f7e07 | 429 | u32 skb_length; |
b08cc791 | 430 | struct hv_page_buffer page_buf[MAX_PAGE_BUFFER_COUNT]; |
a9f2e2d6 | 431 | struct hv_page_buffer *pb = page_buf; |
7eafd9b4 | 432 | struct netvsc_stats *tx_stats = this_cpu_ptr(net_device_ctx->tx_stats); |
fceaf24a | 433 | |
54a7357f KS |
434 | /* We will atmost need two pages to describe the rndis |
435 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number | |
e88f7e07 VK |
436 | * of pages in a single packet. If skb is scattered around |
437 | * more pages we try linearizing it. | |
54a7357f | 438 | */ |
e88f7e07 VK |
439 | |
440 | check_size: | |
441 | skb_length = skb->len; | |
8a00251a | 442 | num_data_pgs = netvsc_get_slots(skb) + 2; |
e88f7e07 VK |
443 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT && linear) { |
444 | net_alert_ratelimited("packet too big: %u pages (%u bytes)\n", | |
445 | num_data_pgs, skb->len); | |
981a1bd8 VK |
446 | ret = -EFAULT; |
447 | goto drop; | |
e88f7e07 VK |
448 | } else if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { |
449 | if (skb_linearize(skb)) { | |
450 | net_alert_ratelimited("failed to linearize skb\n"); | |
451 | ret = -ENOMEM; | |
452 | goto drop; | |
453 | } | |
454 | linear = true; | |
455 | goto check_size; | |
54a7357f | 456 | } |
fceaf24a | 457 | |
c0eb4540 KS |
458 | /* |
459 | * Place the rndis header in the skb head room and | |
460 | * the skb->cb will be used for hv_netvsc_packet | |
461 | * structure. | |
462 | */ | |
463 | ret = skb_cow_head(skb, RNDIS_AND_PPI_SIZE); | |
b56fc3c5 KS |
464 | if (ret) { |
465 | netdev_err(net, "unable to alloc hv_netvsc_packet\n"); | |
466 | ret = -ENOMEM; | |
467 | goto drop; | |
fceaf24a | 468 | } |
c0eb4540 KS |
469 | /* Use the skb control buffer for building up the packet */ |
470 | BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) > | |
471 | FIELD_SIZEOF(struct sk_buff, cb)); | |
472 | packet = (struct hv_netvsc_packet *)skb->cb; | |
fceaf24a | 473 | |
1f5f3a75 | 474 | |
5b54dac8 HZ |
475 | packet->q_idx = skb_get_queue_mapping(skb); |
476 | ||
4d447c9a | 477 | packet->total_data_buflen = skb->len; |
fceaf24a | 478 | |
c0eb4540 | 479 | rndis_msg = (struct rndis_message *)skb->head; |
b08cc791 | 480 | |
24476760 | 481 | memset(rndis_msg, 0, RNDIS_AND_PPI_SIZE); |
fceaf24a | 482 | |
760d1e36 | 483 | isvlan = skb->vlan_tci & VLAN_TAG_PRESENT; |
8a00251a KS |
484 | |
485 | /* Add the rndis header */ | |
8a00251a KS |
486 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; |
487 | rndis_msg->msg_len = packet->total_data_buflen; | |
488 | rndis_pkt = &rndis_msg->msg.pkt; | |
489 | rndis_pkt->data_offset = sizeof(struct rndis_packet); | |
490 | rndis_pkt->data_len = packet->total_data_buflen; | |
491 | rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); | |
492 | ||
493 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); | |
494 | ||
307f0995 HZ |
495 | hash = skb_get_hash_raw(skb); |
496 | if (hash != 0 && net->real_num_tx_queues > 1) { | |
497 | rndis_msg_size += NDIS_HASH_PPI_SIZE; | |
498 | ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE, | |
499 | NBL_HASH_VALUE); | |
500 | *(u32 *)((void *)ppi + ppi->ppi_offset) = hash; | |
501 | } | |
502 | ||
8a00251a KS |
503 | if (isvlan) { |
504 | struct ndis_pkt_8021q_info *vlan; | |
505 | ||
506 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; | |
507 | ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, | |
508 | IEEE_8021Q_INFO); | |
509 | vlan = (struct ndis_pkt_8021q_info *)((void *)ppi + | |
510 | ppi->ppi_offset); | |
760d1e36 KS |
511 | vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK; |
512 | vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >> | |
8a00251a KS |
513 | VLAN_PRIO_SHIFT; |
514 | } | |
515 | ||
08cd04bf KS |
516 | net_trans_info = get_net_transport_info(skb, &hdr_offset); |
517 | if (net_trans_info == TRANSPORT_INFO_NOT_IP) | |
518 | goto do_send; | |
519 | ||
520 | /* | |
521 | * Setup the sendside checksum offload only if this is not a | |
522 | * GSO packet. | |
523 | */ | |
524 | if (skb_is_gso(skb)) | |
77bf5487 | 525 | goto do_lso; |
08cd04bf | 526 | |
22041fb0 KS |
527 | if ((skb->ip_summed == CHECKSUM_NONE) || |
528 | (skb->ip_summed == CHECKSUM_UNNECESSARY)) | |
529 | goto do_send; | |
530 | ||
08cd04bf KS |
531 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; |
532 | ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, | |
533 | TCPIP_CHKSUM_PKTINFO); | |
534 | ||
535 | csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + | |
536 | ppi->ppi_offset); | |
537 | ||
538 | if (net_trans_info & (INFO_IPV4 << 16)) | |
539 | csum_info->transmit.is_ipv4 = 1; | |
540 | else | |
541 | csum_info->transmit.is_ipv6 = 1; | |
542 | ||
543 | if (net_trans_info & INFO_TCP) { | |
544 | csum_info->transmit.tcp_checksum = 1; | |
545 | csum_info->transmit.tcp_header_offset = hdr_offset; | |
546 | } else if (net_trans_info & INFO_UDP) { | |
af9893a3 KS |
547 | /* UDP checksum offload is not supported on ws2008r2. |
548 | * Furthermore, on ws2012 and ws2012r2, there are some | |
549 | * issues with udp checksum offload from Linux guests. | |
550 | * (these are host issues). | |
551 | * For now compute the checksum here. | |
552 | */ | |
553 | struct udphdr *uh; | |
554 | u16 udp_len; | |
555 | ||
556 | ret = skb_cow_head(skb, 0); | |
557 | if (ret) | |
558 | goto drop; | |
559 | ||
560 | uh = udp_hdr(skb); | |
561 | udp_len = ntohs(uh->len); | |
562 | uh->check = 0; | |
563 | uh->check = csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
564 | ip_hdr(skb)->daddr, | |
565 | udp_len, IPPROTO_UDP, | |
566 | csum_partial(uh, udp_len, 0)); | |
567 | if (uh->check == 0) | |
568 | uh->check = CSUM_MANGLED_0; | |
569 | ||
570 | csum_info->transmit.udp_checksum = 0; | |
08cd04bf | 571 | } |
77bf5487 KS |
572 | goto do_send; |
573 | ||
574 | do_lso: | |
575 | rndis_msg_size += NDIS_LSO_PPI_SIZE; | |
576 | ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, | |
577 | TCP_LARGESEND_PKTINFO); | |
578 | ||
579 | lso_info = (struct ndis_tcp_lso_info *)((void *)ppi + | |
580 | ppi->ppi_offset); | |
581 | ||
582 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; | |
583 | if (net_trans_info & (INFO_IPV4 << 16)) { | |
584 | lso_info->lso_v2_transmit.ip_version = | |
585 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; | |
586 | ip_hdr(skb)->tot_len = 0; | |
587 | ip_hdr(skb)->check = 0; | |
588 | tcp_hdr(skb)->check = | |
589 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
590 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
591 | } else { | |
592 | lso_info->lso_v2_transmit.ip_version = | |
593 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; | |
594 | ipv6_hdr(skb)->payload_len = 0; | |
595 | tcp_hdr(skb)->check = | |
596 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
597 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
598 | } | |
599 | lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset; | |
600 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; | |
08cd04bf KS |
601 | |
602 | do_send: | |
8a00251a KS |
603 | /* Start filling in the page buffers with the rndis hdr */ |
604 | rndis_msg->msg_len += rndis_msg_size; | |
942396b0 | 605 | packet->total_data_buflen = rndis_msg->msg_len; |
8a00251a | 606 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, |
a9f2e2d6 | 607 | skb, packet, &pb); |
8a00251a | 608 | |
3a3d9a0a KS |
609 | ret = netvsc_send(net_device_ctx->device_ctx, packet, |
610 | rndis_msg, &pb, skb); | |
8a00251a | 611 | |
af9893a3 | 612 | drop: |
02fafbc6 | 613 | if (ret == 0) { |
4b02b58b | 614 | u64_stats_update_begin(&tx_stats->syncp); |
7eafd9b4 | 615 | tx_stats->packets++; |
616 | tx_stats->bytes += skb_length; | |
4b02b58b | 617 | u64_stats_update_end(&tx_stats->syncp); |
b220f5f9 | 618 | } else { |
33be96e4 HZ |
619 | if (ret != -EAGAIN) { |
620 | dev_kfree_skb_any(skb); | |
621 | net->stats.tx_dropped++; | |
622 | } | |
fceaf24a HJ |
623 | } |
624 | ||
33be96e4 | 625 | return (ret == -EAGAIN) ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
fceaf24a HJ |
626 | } |
627 | ||
3e189519 | 628 | /* |
02fafbc6 GKH |
629 | * netvsc_linkstatus_callback - Link up/down notification |
630 | */ | |
90ef117a | 631 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
3a494e71 | 632 | struct rndis_message *resp) |
fceaf24a | 633 | { |
3a494e71 | 634 | struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
2ddd5e5f | 635 | struct net_device *net; |
c996edcf | 636 | struct net_device_context *ndev_ctx; |
2ddd5e5f | 637 | struct netvsc_device *net_device; |
27a70af3 VK |
638 | struct netvsc_reconfig *event; |
639 | unsigned long flags; | |
891de74d | 640 | |
27a70af3 VK |
641 | /* Handle link change statuses only */ |
642 | if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE && | |
643 | indicate->status != RNDIS_STATUS_MEDIA_CONNECT && | |
644 | indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT) | |
3a494e71 | 645 | return; |
891de74d | 646 | |
27a70af3 | 647 | net_device = hv_get_drvdata(device_obj); |
2ddd5e5f | 648 | net = net_device->ndev; |
fceaf24a | 649 | |
891de74d | 650 | if (!net || net->reg_state != NETREG_REGISTERED) |
fceaf24a | 651 | return; |
fceaf24a | 652 | |
891de74d | 653 | ndev_ctx = netdev_priv(net); |
27a70af3 VK |
654 | |
655 | event = kzalloc(sizeof(*event), GFP_ATOMIC); | |
656 | if (!event) | |
657 | return; | |
658 | event->event = indicate->status; | |
659 | ||
660 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
661 | list_add_tail(&event->list, &ndev_ctx->reconfig_events); | |
662 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
663 | ||
664 | schedule_delayed_work(&ndev_ctx->dwork, 0); | |
fceaf24a HJ |
665 | } |
666 | ||
3e189519 HJ |
667 | /* |
668 | * netvsc_recv_callback - Callback when we receive a packet from the | |
669 | * "wire" on the specified device. | |
02fafbc6 | 670 | */ |
f79adf8f | 671 | int netvsc_recv_callback(struct hv_device *device_obj, |
e3d605ed | 672 | struct hv_netvsc_packet *packet, |
c4b20c63 | 673 | void **data, |
25b85ee8 | 674 | struct ndis_tcp_ip_checksum_info *csum_info, |
760d1e36 KS |
675 | struct vmbus_channel *channel, |
676 | u16 vlan_tci) | |
fceaf24a | 677 | { |
6f4c4446 | 678 | struct net_device *net; |
7eafd9b4 | 679 | struct net_device_context *net_device_ctx; |
fceaf24a | 680 | struct sk_buff *skb; |
7eafd9b4 | 681 | struct netvsc_stats *rx_stats; |
fceaf24a | 682 | |
6f4c4446 | 683 | net = ((struct netvsc_device *)hv_get_drvdata(device_obj))->ndev; |
a68f9614 | 684 | if (!net || net->reg_state != NETREG_REGISTERED) { |
10082f98 | 685 | return NVSP_STAT_FAIL; |
fceaf24a | 686 | } |
7eafd9b4 | 687 | net_device_ctx = netdev_priv(net); |
688 | rx_stats = this_cpu_ptr(net_device_ctx->rx_stats); | |
fceaf24a | 689 | |
9495c282 | 690 | /* Allocate a skb - TODO direct I/O to pages? */ |
72a2f5bd | 691 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
9495c282 SH |
692 | if (unlikely(!skb)) { |
693 | ++net->stats.rx_dropped; | |
10082f98 | 694 | return NVSP_STAT_FAIL; |
9495c282 | 695 | } |
fceaf24a | 696 | |
02fafbc6 GKH |
697 | /* |
698 | * Copy to skb. This copy is needed here since the memory pointed by | |
699 | * hv_netvsc_packet cannot be deallocated | |
700 | */ | |
c4b20c63 | 701 | memcpy(skb_put(skb, packet->total_data_buflen), *data, |
45326342 | 702 | packet->total_data_buflen); |
fceaf24a HJ |
703 | |
704 | skb->protocol = eth_type_trans(skb, net); | |
e3d605ed KS |
705 | if (csum_info) { |
706 | /* We only look at the IP checksum here. | |
707 | * Should we be dropping the packet if checksum | |
708 | * failed? How do we deal with other checksums - TCP/UDP? | |
709 | */ | |
710 | if (csum_info->receive.ip_checksum_succeeded) | |
711 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
712 | else | |
713 | skb->ip_summed = CHECKSUM_NONE; | |
714 | } | |
715 | ||
760d1e36 | 716 | if (vlan_tci & VLAN_TAG_PRESENT) |
93725cbd | 717 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
760d1e36 | 718 | vlan_tci); |
fceaf24a | 719 | |
25b85ee8 | 720 | skb_record_rx_queue(skb, channel-> |
e565e803 | 721 | offermsg.offer.sub_channel_index); |
5b54dac8 | 722 | |
4b02b58b | 723 | u64_stats_update_begin(&rx_stats->syncp); |
7eafd9b4 | 724 | rx_stats->packets++; |
725 | rx_stats->bytes += packet->total_data_buflen; | |
4b02b58b | 726 | u64_stats_update_end(&rx_stats->syncp); |
9495c282 | 727 | |
02fafbc6 GKH |
728 | /* |
729 | * Pass the skb back up. Network stack will deallocate the skb when it | |
9495c282 SH |
730 | * is done. |
731 | * TODO - use NAPI? | |
02fafbc6 | 732 | */ |
9495c282 | 733 | netif_rx(skb); |
fceaf24a | 734 | |
fceaf24a HJ |
735 | return 0; |
736 | } | |
737 | ||
f82f4ad7 SH |
738 | static void netvsc_get_drvinfo(struct net_device *net, |
739 | struct ethtool_drvinfo *info) | |
740 | { | |
7826d43f | 741 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 742 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
f82f4ad7 SH |
743 | } |
744 | ||
59995370 AS |
745 | static void netvsc_get_channels(struct net_device *net, |
746 | struct ethtool_channels *channel) | |
747 | { | |
748 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
749 | struct hv_device *dev = net_device_ctx->device_ctx; | |
750 | struct netvsc_device *nvdev = hv_get_drvdata(dev); | |
751 | ||
752 | if (nvdev) { | |
753 | channel->max_combined = nvdev->max_chn; | |
754 | channel->combined_count = nvdev->num_chn; | |
755 | } | |
756 | } | |
757 | ||
b5960e6e AS |
758 | static int netvsc_set_channels(struct net_device *net, |
759 | struct ethtool_channels *channels) | |
760 | { | |
761 | struct net_device_context *net_device_ctx = netdev_priv(net); | |
762 | struct hv_device *dev = net_device_ctx->device_ctx; | |
763 | struct netvsc_device *nvdev = hv_get_drvdata(dev); | |
764 | struct netvsc_device_info device_info; | |
954591b9 AS |
765 | u32 num_chn; |
766 | u32 max_chn; | |
b5960e6e AS |
767 | int ret = 0; |
768 | bool recovering = false; | |
769 | ||
770 | if (!nvdev || nvdev->destroy) | |
771 | return -ENODEV; | |
772 | ||
954591b9 AS |
773 | num_chn = nvdev->num_chn; |
774 | max_chn = min_t(u32, nvdev->max_chn, num_online_cpus()); | |
775 | ||
b5960e6e AS |
776 | if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) { |
777 | pr_info("vRSS unsupported before NVSP Version 5\n"); | |
778 | return -EINVAL; | |
779 | } | |
780 | ||
781 | /* We do not support rx, tx, or other */ | |
782 | if (!channels || | |
783 | channels->rx_count || | |
784 | channels->tx_count || | |
785 | channels->other_count || | |
786 | (channels->combined_count < 1)) | |
787 | return -EINVAL; | |
788 | ||
789 | if (channels->combined_count > max_chn) { | |
790 | pr_info("combined channels too high, using %d\n", max_chn); | |
791 | channels->combined_count = max_chn; | |
792 | } | |
793 | ||
794 | ret = netvsc_close(net); | |
795 | if (ret) | |
796 | goto out; | |
797 | ||
798 | do_set: | |
799 | nvdev->start_remove = true; | |
800 | rndis_filter_device_remove(dev); | |
801 | ||
802 | nvdev->num_chn = channels->combined_count; | |
803 | ||
804 | net_device_ctx->device_ctx = dev; | |
805 | hv_set_drvdata(dev, net); | |
806 | ||
807 | memset(&device_info, 0, sizeof(device_info)); | |
808 | device_info.num_chn = nvdev->num_chn; /* passed to RNDIS */ | |
809 | device_info.ring_size = ring_size; | |
810 | device_info.max_num_vrss_chns = max_num_vrss_chns; | |
811 | ||
812 | ret = rndis_filter_device_add(dev, &device_info); | |
813 | if (ret) { | |
814 | if (recovering) { | |
815 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
816 | return ret; | |
817 | } | |
818 | goto recover; | |
819 | } | |
820 | ||
821 | nvdev = hv_get_drvdata(dev); | |
822 | ||
823 | ret = netif_set_real_num_tx_queues(net, nvdev->num_chn); | |
824 | if (ret) { | |
825 | if (recovering) { | |
826 | netdev_err(net, "could not set tx queue count (ret %d)\n", ret); | |
827 | return ret; | |
828 | } | |
829 | goto recover; | |
830 | } | |
831 | ||
832 | ret = netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
833 | if (ret) { | |
834 | if (recovering) { | |
835 | netdev_err(net, "could not set rx queue count (ret %d)\n", ret); | |
836 | return ret; | |
837 | } | |
838 | goto recover; | |
839 | } | |
840 | ||
841 | out: | |
842 | netvsc_open(net); | |
843 | ||
844 | return ret; | |
845 | ||
846 | recover: | |
847 | /* If the above failed, we attempt to recover through the same | |
848 | * process but with the original number of channels. | |
849 | */ | |
850 | netdev_err(net, "could not set channels, recovering\n"); | |
851 | recovering = true; | |
852 | channels->combined_count = num_chn; | |
853 | goto do_set; | |
854 | } | |
855 | ||
4d447c9a HZ |
856 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
857 | { | |
858 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
859 | struct hv_device *hdev = ndevctx->device_ctx; | |
860 | struct netvsc_device *nvdev = hv_get_drvdata(hdev); | |
861 | struct netvsc_device_info device_info; | |
862 | int limit = ETH_DATA_LEN; | |
2de8530b | 863 | int ret = 0; |
4d447c9a HZ |
864 | |
865 | if (nvdev == NULL || nvdev->destroy) | |
866 | return -ENODEV; | |
867 | ||
a1eabb01 | 868 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) |
4d3c9d37 | 869 | limit = NETVSC_MTU - ETH_HLEN; |
4d447c9a | 870 | |
f9cbce34 | 871 | if (mtu < NETVSC_MTU_MIN || mtu > limit) |
4d447c9a HZ |
872 | return -EINVAL; |
873 | ||
2de8530b HZ |
874 | ret = netvsc_close(ndev); |
875 | if (ret) | |
876 | goto out; | |
877 | ||
4d447c9a | 878 | nvdev->start_remove = true; |
4d447c9a HZ |
879 | rndis_filter_device_remove(hdev); |
880 | ||
881 | ndev->mtu = mtu; | |
882 | ||
883 | ndevctx->device_ctx = hdev; | |
884 | hv_set_drvdata(hdev, ndev); | |
8ebdcc52 AS |
885 | |
886 | memset(&device_info, 0, sizeof(device_info)); | |
4d447c9a | 887 | device_info.ring_size = ring_size; |
b5960e6e | 888 | device_info.num_chn = nvdev->num_chn; |
e01ec219 | 889 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
4d447c9a | 890 | rndis_filter_device_add(hdev, &device_info); |
4d447c9a | 891 | |
2de8530b HZ |
892 | out: |
893 | netvsc_open(ndev); | |
894 | ||
895 | return ret; | |
4d447c9a HZ |
896 | } |
897 | ||
7eafd9b4 | 898 | static struct rtnl_link_stats64 *netvsc_get_stats64(struct net_device *net, |
899 | struct rtnl_link_stats64 *t) | |
900 | { | |
901 | struct net_device_context *ndev_ctx = netdev_priv(net); | |
902 | int cpu; | |
903 | ||
904 | for_each_possible_cpu(cpu) { | |
905 | struct netvsc_stats *tx_stats = per_cpu_ptr(ndev_ctx->tx_stats, | |
906 | cpu); | |
907 | struct netvsc_stats *rx_stats = per_cpu_ptr(ndev_ctx->rx_stats, | |
908 | cpu); | |
909 | u64 tx_packets, tx_bytes, rx_packets, rx_bytes; | |
910 | unsigned int start; | |
911 | ||
912 | do { | |
4b02b58b | 913 | start = u64_stats_fetch_begin_irq(&tx_stats->syncp); |
7eafd9b4 | 914 | tx_packets = tx_stats->packets; |
915 | tx_bytes = tx_stats->bytes; | |
4b02b58b | 916 | } while (u64_stats_fetch_retry_irq(&tx_stats->syncp, start)); |
7eafd9b4 | 917 | |
918 | do { | |
4b02b58b | 919 | start = u64_stats_fetch_begin_irq(&rx_stats->syncp); |
7eafd9b4 | 920 | rx_packets = rx_stats->packets; |
921 | rx_bytes = rx_stats->bytes; | |
4b02b58b | 922 | } while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start)); |
7eafd9b4 | 923 | |
924 | t->tx_bytes += tx_bytes; | |
925 | t->tx_packets += tx_packets; | |
926 | t->rx_bytes += rx_bytes; | |
927 | t->rx_packets += rx_packets; | |
928 | } | |
929 | ||
930 | t->tx_dropped = net->stats.tx_dropped; | |
931 | t->tx_errors = net->stats.tx_dropped; | |
932 | ||
933 | t->rx_dropped = net->stats.rx_dropped; | |
934 | t->rx_errors = net->stats.rx_errors; | |
935 | ||
936 | return t; | |
937 | } | |
1ce09e89 HZ |
938 | |
939 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
940 | { | |
941 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
942 | struct hv_device *hdev = ndevctx->device_ctx; | |
943 | struct sockaddr *addr = p; | |
9a4c831e | 944 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
945 | unsigned char save_aatype; |
946 | int err; | |
947 | ||
948 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
949 | save_aatype = ndev->addr_assign_type; | |
950 | ||
951 | err = eth_mac_addr(ndev, p); | |
952 | if (err != 0) | |
953 | return err; | |
954 | ||
955 | err = rndis_filter_set_device_mac(hdev, addr->sa_data); | |
956 | if (err != 0) { | |
957 | /* roll back to saved MAC */ | |
958 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
959 | ndev->addr_assign_type = save_aatype; | |
960 | } | |
961 | ||
962 | return err; | |
963 | } | |
964 | ||
316158fe RW |
965 | #ifdef CONFIG_NET_POLL_CONTROLLER |
966 | static void netvsc_poll_controller(struct net_device *net) | |
967 | { | |
968 | /* As netvsc_start_xmit() works synchronous we don't have to | |
969 | * trigger anything here. | |
970 | */ | |
971 | } | |
972 | #endif | |
1ce09e89 | 973 | |
f82f4ad7 SH |
974 | static const struct ethtool_ops ethtool_ops = { |
975 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 | 976 | .get_link = ethtool_op_get_link, |
59995370 | 977 | .get_channels = netvsc_get_channels, |
b5960e6e | 978 | .set_channels = netvsc_set_channels, |
f82f4ad7 SH |
979 | }; |
980 | ||
df2fff28 GKH |
981 | static const struct net_device_ops device_ops = { |
982 | .ndo_open = netvsc_open, | |
983 | .ndo_stop = netvsc_close, | |
984 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 985 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 986 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 987 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 988 | .ndo_set_mac_address = netvsc_set_mac_addr, |
5b54dac8 | 989 | .ndo_select_queue = netvsc_select_queue, |
7eafd9b4 | 990 | .ndo_get_stats64 = netvsc_get_stats64, |
316158fe RW |
991 | #ifdef CONFIG_NET_POLL_CONTROLLER |
992 | .ndo_poll_controller = netvsc_poll_controller, | |
993 | #endif | |
df2fff28 GKH |
994 | }; |
995 | ||
c996edcf | 996 | /* |
27a70af3 VK |
997 | * Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link |
998 | * down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is | |
999 | * present send GARP packet to network peers with netif_notify_peers(). | |
c996edcf | 1000 | */ |
891de74d | 1001 | static void netvsc_link_change(struct work_struct *w) |
c996edcf HZ |
1002 | { |
1003 | struct net_device_context *ndev_ctx; | |
1004 | struct net_device *net; | |
2ddd5e5f | 1005 | struct netvsc_device *net_device; |
891de74d | 1006 | struct rndis_device *rdev; |
27a70af3 VK |
1007 | struct netvsc_reconfig *event = NULL; |
1008 | bool notify = false, reschedule = false; | |
1009 | unsigned long flags, next_reconfig, delay; | |
c996edcf | 1010 | |
122a5f64 | 1011 | ndev_ctx = container_of(w, struct net_device_context, dwork.work); |
2ddd5e5f | 1012 | net_device = hv_get_drvdata(ndev_ctx->device_ctx); |
891de74d | 1013 | rdev = net_device->extension; |
2ddd5e5f | 1014 | net = net_device->ndev; |
891de74d | 1015 | |
27a70af3 VK |
1016 | next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT; |
1017 | if (time_is_after_jiffies(next_reconfig)) { | |
1018 | /* link_watch only sends one notification with current state | |
1019 | * per second, avoid doing reconfig more frequently. Handle | |
1020 | * wrap around. | |
1021 | */ | |
1022 | delay = next_reconfig - jiffies; | |
1023 | delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT; | |
1024 | schedule_delayed_work(&ndev_ctx->dwork, delay); | |
1025 | return; | |
1026 | } | |
1027 | ndev_ctx->last_reconfig = jiffies; | |
1028 | ||
1029 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
1030 | if (!list_empty(&ndev_ctx->reconfig_events)) { | |
1031 | event = list_first_entry(&ndev_ctx->reconfig_events, | |
1032 | struct netvsc_reconfig, list); | |
1033 | list_del(&event->list); | |
1034 | reschedule = !list_empty(&ndev_ctx->reconfig_events); | |
1035 | } | |
1036 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
1037 | ||
1038 | if (!event) | |
1039 | return; | |
1040 | ||
1041 | rtnl_lock(); | |
1042 | ||
1043 | switch (event->event) { | |
1044 | /* Only the following events are possible due to the check in | |
1045 | * netvsc_linkstatus_callback() | |
1046 | */ | |
1047 | case RNDIS_STATUS_MEDIA_CONNECT: | |
1048 | if (rdev->link_state) { | |
1049 | rdev->link_state = false; | |
1050 | netif_carrier_on(net); | |
1051 | netif_tx_wake_all_queues(net); | |
1052 | } else { | |
1053 | notify = true; | |
1054 | } | |
1055 | kfree(event); | |
1056 | break; | |
1057 | case RNDIS_STATUS_MEDIA_DISCONNECT: | |
1058 | if (!rdev->link_state) { | |
1059 | rdev->link_state = true; | |
1060 | netif_carrier_off(net); | |
1061 | netif_tx_stop_all_queues(net); | |
1062 | } | |
1063 | kfree(event); | |
1064 | break; | |
1065 | case RNDIS_STATUS_NETWORK_CHANGE: | |
1066 | /* Only makes sense if carrier is present */ | |
1067 | if (!rdev->link_state) { | |
1068 | rdev->link_state = true; | |
1069 | netif_carrier_off(net); | |
1070 | netif_tx_stop_all_queues(net); | |
1071 | event->event = RNDIS_STATUS_MEDIA_CONNECT; | |
1072 | spin_lock_irqsave(&ndev_ctx->lock, flags); | |
1073 | list_add_tail(&event->list, &ndev_ctx->reconfig_events); | |
1074 | spin_unlock_irqrestore(&ndev_ctx->lock, flags); | |
1075 | reschedule = true; | |
3a494e71 | 1076 | } |
27a70af3 | 1077 | break; |
891de74d HZ |
1078 | } |
1079 | ||
1080 | rtnl_unlock(); | |
1081 | ||
1082 | if (notify) | |
1083 | netdev_notify_peers(net); | |
27a70af3 VK |
1084 | |
1085 | /* link_watch only sends one notification with current state per | |
1086 | * second, handle next reconfig event in 2 seconds. | |
1087 | */ | |
1088 | if (reschedule) | |
1089 | schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); | |
c996edcf HZ |
1090 | } |
1091 | ||
7eafd9b4 | 1092 | static void netvsc_free_netdev(struct net_device *netdev) |
1093 | { | |
1094 | struct net_device_context *net_device_ctx = netdev_priv(netdev); | |
1095 | ||
1096 | free_percpu(net_device_ctx->tx_stats); | |
1097 | free_percpu(net_device_ctx->rx_stats); | |
1098 | free_netdev(netdev); | |
1099 | } | |
c996edcf | 1100 | |
84946899 S |
1101 | static int netvsc_probe(struct hv_device *dev, |
1102 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 1103 | { |
df2fff28 GKH |
1104 | struct net_device *net = NULL; |
1105 | struct net_device_context *net_device_ctx; | |
1106 | struct netvsc_device_info device_info; | |
5b54dac8 | 1107 | struct netvsc_device *nvdev; |
df2fff28 GKH |
1108 | int ret; |
1109 | ||
5b54dac8 HZ |
1110 | net = alloc_etherdev_mq(sizeof(struct net_device_context), |
1111 | num_online_cpus()); | |
df2fff28 | 1112 | if (!net) |
51a805d0 | 1113 | return -ENOMEM; |
df2fff28 | 1114 | |
1b07da51 HZ |
1115 | netif_carrier_off(net); |
1116 | ||
df2fff28 | 1117 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 1118 | net_device_ctx->device_ctx = dev; |
3f300ff4 SX |
1119 | net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); |
1120 | if (netif_msg_probe(net_device_ctx)) | |
1121 | netdev_dbg(net, "netvsc msg_enable: %d\n", | |
1122 | net_device_ctx->msg_enable); | |
1123 | ||
7eafd9b4 | 1124 | net_device_ctx->tx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); |
1125 | if (!net_device_ctx->tx_stats) { | |
1126 | free_netdev(net); | |
1127 | return -ENOMEM; | |
1128 | } | |
1129 | net_device_ctx->rx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); | |
1130 | if (!net_device_ctx->rx_stats) { | |
1131 | free_percpu(net_device_ctx->tx_stats); | |
1132 | free_netdev(net); | |
1133 | return -ENOMEM; | |
1134 | } | |
1135 | ||
2ddd5e5f | 1136 | hv_set_drvdata(dev, net); |
891de74d | 1137 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
792df872 | 1138 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
df2fff28 | 1139 | |
27a70af3 VK |
1140 | spin_lock_init(&net_device_ctx->lock); |
1141 | INIT_LIST_HEAD(&net_device_ctx->reconfig_events); | |
1142 | ||
df2fff28 GKH |
1143 | net->netdev_ops = &device_ops; |
1144 | ||
77bf5487 KS |
1145 | net->hw_features = NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_IP_CSUM | |
1146 | NETIF_F_TSO; | |
08cd04bf | 1147 | net->features = NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_SG | NETIF_F_RXCSUM | |
77bf5487 | 1148 | NETIF_F_IP_CSUM | NETIF_F_TSO; |
6048718d | 1149 | |
7ad24ea4 | 1150 | net->ethtool_ops = ðtool_ops; |
9efd21e1 | 1151 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 1152 | |
692e084e | 1153 | /* Notify the netvsc driver of the new device */ |
8ebdcc52 | 1154 | memset(&device_info, 0, sizeof(device_info)); |
692e084e | 1155 | device_info.ring_size = ring_size; |
e01ec219 | 1156 | device_info.max_num_vrss_chns = max_num_vrss_chns; |
692e084e HZ |
1157 | ret = rndis_filter_device_add(dev, &device_info); |
1158 | if (ret != 0) { | |
1159 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
7eafd9b4 | 1160 | netvsc_free_netdev(net); |
2ddd5e5f | 1161 | hv_set_drvdata(dev, NULL); |
692e084e | 1162 | return ret; |
df2fff28 | 1163 | } |
692e084e HZ |
1164 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
1165 | ||
5b54dac8 HZ |
1166 | nvdev = hv_get_drvdata(dev); |
1167 | netif_set_real_num_tx_queues(net, nvdev->num_chn); | |
1168 | netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
5b54dac8 | 1169 | |
a68f9614 HZ |
1170 | ret = register_netdev(net); |
1171 | if (ret != 0) { | |
1172 | pr_err("Unable to register netdev.\n"); | |
1173 | rndis_filter_device_remove(dev); | |
7eafd9b4 | 1174 | netvsc_free_netdev(net); |
a68f9614 HZ |
1175 | } |
1176 | ||
df2fff28 GKH |
1177 | return ret; |
1178 | } | |
1179 | ||
415b023a | 1180 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 1181 | { |
2ddd5e5f | 1182 | struct net_device *net; |
122a5f64 | 1183 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
1184 | struct netvsc_device *net_device; |
1185 | ||
1186 | net_device = hv_get_drvdata(dev); | |
1187 | net = net_device->ndev; | |
df2fff28 | 1188 | |
df2fff28 | 1189 | if (net == NULL) { |
415b023a | 1190 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
1191 | return 0; |
1192 | } | |
1193 | ||
4d447c9a HZ |
1194 | net_device->start_remove = true; |
1195 | ||
122a5f64 HZ |
1196 | ndev_ctx = netdev_priv(net); |
1197 | cancel_delayed_work_sync(&ndev_ctx->dwork); | |
792df872 | 1198 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 1199 | |
df2fff28 | 1200 | /* Stop outbound asap */ |
0a282538 | 1201 | netif_tx_disable(net); |
df2fff28 GKH |
1202 | |
1203 | unregister_netdev(net); | |
1204 | ||
1205 | /* | |
1206 | * Call to the vsc driver to let it know that the device is being | |
1207 | * removed | |
1208 | */ | |
df06bcff | 1209 | rndis_filter_device_remove(dev); |
df2fff28 | 1210 | |
7eafd9b4 | 1211 | netvsc_free_netdev(net); |
df06bcff | 1212 | return 0; |
df2fff28 GKH |
1213 | } |
1214 | ||
345c4cc3 | 1215 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 1216 | /* Network guid */ |
8f505944 | 1217 | { HV_NIC_GUID, }, |
c45cf2d4 | 1218 | { }, |
345c4cc3 S |
1219 | }; |
1220 | ||
1221 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
1222 | ||
f1542a66 | 1223 | /* The one and only one */ |
fde0ef9b | 1224 | static struct hv_driver netvsc_drv = { |
d31b20fc | 1225 | .name = KBUILD_MODNAME, |
345c4cc3 | 1226 | .id_table = id_table, |
fde0ef9b S |
1227 | .probe = netvsc_probe, |
1228 | .remove = netvsc_remove, | |
d4890970 | 1229 | }; |
f1542a66 | 1230 | |
a9869c94 | 1231 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 1232 | { |
768fa219 | 1233 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
1234 | } |
1235 | ||
1fde28cf | 1236 | static int __init netvsc_drv_init(void) |
df2fff28 | 1237 | { |
fa85a6c2 HZ |
1238 | if (ring_size < RING_SIZE_MIN) { |
1239 | ring_size = RING_SIZE_MIN; | |
1240 | pr_info("Increased ring_size to %d (min allowed)\n", | |
1241 | ring_size); | |
1242 | } | |
768fa219 | 1243 | return vmbus_driver_register(&netvsc_drv); |
df2fff28 GKH |
1244 | } |
1245 | ||
26c14cc1 | 1246 | MODULE_LICENSE("GPL"); |
7880fc54 | 1247 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 1248 | |
1fde28cf | 1249 | module_init(netvsc_drv_init); |
a9869c94 | 1250 | module_exit(netvsc_drv_exit); |