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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 | struct net_device_context { |
02fafbc6 | 44 | /* point back to our device context */ |
6bad88da | 45 | struct hv_device *device_ctx; |
122a5f64 | 46 | struct delayed_work dwork; |
792df872 | 47 | struct work_struct work; |
fceaf24a HJ |
48 | }; |
49 | ||
fa85a6c2 | 50 | #define RING_SIZE_MIN 64 |
99c8da0f | 51 | static int ring_size = 128; |
450d7a4b SH |
52 | module_param(ring_size, int, S_IRUGO); |
53 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); | |
fceaf24a | 54 | |
d426b2e3 HZ |
55 | static void do_set_multicast(struct work_struct *w) |
56 | { | |
792df872 WM |
57 | struct net_device_context *ndevctx = |
58 | container_of(w, struct net_device_context, work); | |
d426b2e3 HZ |
59 | struct netvsc_device *nvdev; |
60 | struct rndis_device *rdev; | |
61 | ||
62 | nvdev = hv_get_drvdata(ndevctx->device_ctx); | |
792df872 WM |
63 | if (nvdev == NULL || nvdev->ndev == NULL) |
64 | return; | |
d426b2e3 HZ |
65 | |
66 | rdev = nvdev->extension; | |
67 | if (rdev == NULL) | |
792df872 | 68 | return; |
d426b2e3 | 69 | |
792df872 | 70 | if (nvdev->ndev->flags & IFF_PROMISC) |
d426b2e3 HZ |
71 | rndis_filter_set_packet_filter(rdev, |
72 | NDIS_PACKET_TYPE_PROMISCUOUS); | |
73 | else | |
74 | rndis_filter_set_packet_filter(rdev, | |
75 | NDIS_PACKET_TYPE_BROADCAST | | |
76 | NDIS_PACKET_TYPE_ALL_MULTICAST | | |
77 | NDIS_PACKET_TYPE_DIRECTED); | |
d426b2e3 HZ |
78 | } |
79 | ||
4e9bfefa | 80 | static void netvsc_set_multicast_list(struct net_device *net) |
fceaf24a | 81 | { |
792df872 | 82 | struct net_device_context *net_device_ctx = netdev_priv(net); |
d426b2e3 | 83 | |
792df872 | 84 | schedule_work(&net_device_ctx->work); |
fceaf24a HJ |
85 | } |
86 | ||
fceaf24a HJ |
87 | static int netvsc_open(struct net_device *net) |
88 | { | |
fceaf24a | 89 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 90 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
891de74d HZ |
91 | struct netvsc_device *nvdev; |
92 | struct rndis_device *rdev; | |
02fafbc6 | 93 | int ret = 0; |
fceaf24a | 94 | |
891de74d HZ |
95 | netif_carrier_off(net); |
96 | ||
d515d0ff HZ |
97 | /* Open up the device */ |
98 | ret = rndis_filter_open(device_obj); | |
99 | if (ret != 0) { | |
100 | netdev_err(net, "unable to open device (ret %d).\n", ret); | |
101 | return ret; | |
fceaf24a HJ |
102 | } |
103 | ||
5b54dac8 | 104 | netif_tx_start_all_queues(net); |
d515d0ff | 105 | |
891de74d HZ |
106 | nvdev = hv_get_drvdata(device_obj); |
107 | rdev = nvdev->extension; | |
108 | if (!rdev->link_state) | |
109 | netif_carrier_on(net); | |
110 | ||
fceaf24a HJ |
111 | return ret; |
112 | } | |
113 | ||
fceaf24a HJ |
114 | static int netvsc_close(struct net_device *net) |
115 | { | |
fceaf24a | 116 | struct net_device_context *net_device_ctx = netdev_priv(net); |
6bad88da | 117 | struct hv_device *device_obj = net_device_ctx->device_ctx; |
02fafbc6 | 118 | int ret; |
fceaf24a | 119 | |
0a282538 | 120 | netif_tx_disable(net); |
fceaf24a | 121 | |
792df872 WM |
122 | /* Make sure netvsc_set_multicast_list doesn't re-enable filter! */ |
123 | cancel_work_sync(&net_device_ctx->work); | |
9c26aa0d | 124 | ret = rndis_filter_close(device_obj); |
fceaf24a | 125 | if (ret != 0) |
eb335bc4 | 126 | netdev_err(net, "unable to close device (ret %d).\n", ret); |
fceaf24a | 127 | |
fceaf24a HJ |
128 | return ret; |
129 | } | |
130 | ||
8a00251a KS |
131 | static void *init_ppi_data(struct rndis_message *msg, u32 ppi_size, |
132 | int pkt_type) | |
133 | { | |
134 | struct rndis_packet *rndis_pkt; | |
135 | struct rndis_per_packet_info *ppi; | |
136 | ||
137 | rndis_pkt = &msg->msg.pkt; | |
138 | rndis_pkt->data_offset += ppi_size; | |
139 | ||
140 | ppi = (struct rndis_per_packet_info *)((void *)rndis_pkt + | |
141 | rndis_pkt->per_pkt_info_offset + rndis_pkt->per_pkt_info_len); | |
142 | ||
143 | ppi->size = ppi_size; | |
144 | ppi->type = pkt_type; | |
145 | ppi->ppi_offset = sizeof(struct rndis_per_packet_info); | |
146 | ||
147 | rndis_pkt->per_pkt_info_len += ppi_size; | |
148 | ||
149 | return ppi; | |
150 | } | |
151 | ||
5b54dac8 HZ |
152 | union sub_key { |
153 | u64 k; | |
154 | struct { | |
155 | u8 pad[3]; | |
156 | u8 kb; | |
157 | u32 ka; | |
158 | }; | |
159 | }; | |
160 | ||
161 | /* Toeplitz hash function | |
162 | * data: network byte order | |
163 | * return: host byte order | |
164 | */ | |
165 | static u32 comp_hash(u8 *key, int klen, u8 *data, int dlen) | |
166 | { | |
167 | union sub_key subk; | |
168 | int k_next = 4; | |
169 | u8 dt; | |
170 | int i, j; | |
171 | u32 ret = 0; | |
172 | ||
173 | subk.k = 0; | |
174 | subk.ka = ntohl(*(u32 *)key); | |
175 | ||
176 | for (i = 0; i < dlen; i++) { | |
177 | subk.kb = key[k_next]; | |
178 | k_next = (k_next + 1) % klen; | |
179 | dt = data[i]; | |
180 | for (j = 0; j < 8; j++) { | |
181 | if (dt & 0x80) | |
182 | ret ^= subk.ka; | |
183 | dt <<= 1; | |
184 | subk.k <<= 1; | |
185 | } | |
186 | } | |
187 | ||
188 | return ret; | |
189 | } | |
190 | ||
191 | static bool netvsc_set_hash(u32 *hash, struct sk_buff *skb) | |
192 | { | |
193 | struct iphdr *iphdr; | |
194 | int data_len; | |
195 | bool ret = false; | |
196 | ||
197 | if (eth_hdr(skb)->h_proto != htons(ETH_P_IP)) | |
198 | return false; | |
199 | ||
200 | iphdr = ip_hdr(skb); | |
201 | ||
202 | if (iphdr->version == 4) { | |
203 | if (iphdr->protocol == IPPROTO_TCP) | |
204 | data_len = 12; | |
205 | else | |
206 | data_len = 8; | |
207 | *hash = comp_hash(netvsc_hash_key, HASH_KEYLEN, | |
208 | (u8 *)&iphdr->saddr, data_len); | |
209 | ret = true; | |
210 | } | |
211 | ||
212 | return ret; | |
213 | } | |
214 | ||
215 | static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, | |
216 | void *accel_priv, select_queue_fallback_t fallback) | |
217 | { | |
218 | struct net_device_context *net_device_ctx = netdev_priv(ndev); | |
219 | struct hv_device *hdev = net_device_ctx->device_ctx; | |
220 | struct netvsc_device *nvsc_dev = hv_get_drvdata(hdev); | |
221 | u32 hash; | |
222 | u16 q_idx = 0; | |
223 | ||
224 | if (nvsc_dev == NULL || ndev->real_num_tx_queues <= 1) | |
225 | return 0; | |
226 | ||
307f0995 | 227 | if (netvsc_set_hash(&hash, skb)) { |
5b54dac8 HZ |
228 | q_idx = nvsc_dev->send_table[hash % VRSS_SEND_TAB_SIZE] % |
229 | ndev->real_num_tx_queues; | |
307f0995 HZ |
230 | skb_set_hash(skb, hash, PKT_HASH_TYPE_L3); |
231 | } | |
5b54dac8 HZ |
232 | |
233 | return q_idx; | |
234 | } | |
235 | ||
fceaf24a HJ |
236 | static void netvsc_xmit_completion(void *context) |
237 | { | |
4193d4f4 | 238 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
02fafbc6 | 239 | struct sk_buff *skb = (struct sk_buff *) |
893f6627 | 240 | (unsigned long)packet->send_completion_tid; |
c25aaf81 | 241 | u32 index = packet->send_buf_index; |
fceaf24a | 242 | |
fceaf24a HJ |
243 | kfree(packet); |
244 | ||
c25aaf81 | 245 | if (skb && (index == NETVSC_INVALID_INDEX)) |
b220f5f9 | 246 | dev_kfree_skb_any(skb); |
fceaf24a HJ |
247 | } |
248 | ||
54a7357f KS |
249 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
250 | struct hv_page_buffer *pb) | |
251 | { | |
252 | int j = 0; | |
253 | ||
254 | /* Deal with compund pages by ignoring unused part | |
255 | * of the page. | |
256 | */ | |
257 | page += (offset >> PAGE_SHIFT); | |
258 | offset &= ~PAGE_MASK; | |
259 | ||
260 | while (len > 0) { | |
261 | unsigned long bytes; | |
262 | ||
263 | bytes = PAGE_SIZE - offset; | |
264 | if (bytes > len) | |
265 | bytes = len; | |
266 | pb[j].pfn = page_to_pfn(page); | |
267 | pb[j].offset = offset; | |
268 | pb[j].len = bytes; | |
269 | ||
270 | offset += bytes; | |
271 | len -= bytes; | |
272 | ||
273 | if (offset == PAGE_SIZE && len) { | |
274 | page++; | |
275 | offset = 0; | |
276 | j++; | |
277 | } | |
278 | } | |
279 | ||
280 | return j + 1; | |
281 | } | |
282 | ||
8a00251a KS |
283 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
284 | struct hv_page_buffer *pb) | |
54a7357f KS |
285 | { |
286 | u32 slots_used = 0; | |
287 | char *data = skb->data; | |
288 | int frags = skb_shinfo(skb)->nr_frags; | |
289 | int i; | |
290 | ||
291 | /* The packet is laid out thus: | |
292 | * 1. hdr | |
293 | * 2. skb linear data | |
294 | * 3. skb fragment data | |
295 | */ | |
296 | if (hdr != NULL) | |
297 | slots_used += fill_pg_buf(virt_to_page(hdr), | |
298 | offset_in_page(hdr), | |
299 | len, &pb[slots_used]); | |
300 | ||
301 | slots_used += fill_pg_buf(virt_to_page(data), | |
302 | offset_in_page(data), | |
303 | skb_headlen(skb), &pb[slots_used]); | |
304 | ||
305 | for (i = 0; i < frags; i++) { | |
306 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
307 | ||
308 | slots_used += fill_pg_buf(skb_frag_page(frag), | |
309 | frag->page_offset, | |
310 | skb_frag_size(frag), &pb[slots_used]); | |
311 | } | |
8a00251a | 312 | return slots_used; |
54a7357f KS |
313 | } |
314 | ||
315 | static int count_skb_frag_slots(struct sk_buff *skb) | |
316 | { | |
317 | int i, frags = skb_shinfo(skb)->nr_frags; | |
318 | int pages = 0; | |
319 | ||
320 | for (i = 0; i < frags; i++) { | |
321 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
322 | unsigned long size = skb_frag_size(frag); | |
323 | unsigned long offset = frag->page_offset; | |
324 | ||
325 | /* Skip unused frames from start of page */ | |
326 | offset &= ~PAGE_MASK; | |
327 | pages += PFN_UP(offset + size); | |
328 | } | |
329 | return pages; | |
330 | } | |
331 | ||
332 | static int netvsc_get_slots(struct sk_buff *skb) | |
333 | { | |
334 | char *data = skb->data; | |
335 | unsigned int offset = offset_in_page(data); | |
336 | unsigned int len = skb_headlen(skb); | |
337 | int slots; | |
338 | int frag_slots; | |
339 | ||
340 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); | |
341 | frag_slots = count_skb_frag_slots(skb); | |
342 | return slots + frag_slots; | |
343 | } | |
344 | ||
08cd04bf KS |
345 | static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off) |
346 | { | |
347 | u32 ret_val = TRANSPORT_INFO_NOT_IP; | |
348 | ||
349 | if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) && | |
350 | (eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) { | |
351 | goto not_ip; | |
352 | } | |
353 | ||
354 | *trans_off = skb_transport_offset(skb); | |
355 | ||
356 | if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) { | |
357 | struct iphdr *iphdr = ip_hdr(skb); | |
358 | ||
359 | if (iphdr->protocol == IPPROTO_TCP) | |
360 | ret_val = TRANSPORT_INFO_IPV4_TCP; | |
361 | else if (iphdr->protocol == IPPROTO_UDP) | |
362 | ret_val = TRANSPORT_INFO_IPV4_UDP; | |
363 | } else { | |
364 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) | |
365 | ret_val = TRANSPORT_INFO_IPV6_TCP; | |
366 | else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) | |
367 | ret_val = TRANSPORT_INFO_IPV6_UDP; | |
368 | } | |
369 | ||
370 | not_ip: | |
371 | return ret_val; | |
372 | } | |
373 | ||
02fafbc6 | 374 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 375 | { |
fceaf24a | 376 | struct net_device_context *net_device_ctx = netdev_priv(net); |
4193d4f4 | 377 | struct hv_netvsc_packet *packet; |
02fafbc6 | 378 | int ret; |
8a00251a KS |
379 | unsigned int num_data_pgs; |
380 | struct rndis_message *rndis_msg; | |
381 | struct rndis_packet *rndis_pkt; | |
382 | u32 rndis_msg_size; | |
383 | bool isvlan; | |
384 | struct rndis_per_packet_info *ppi; | |
08cd04bf | 385 | struct ndis_tcp_ip_checksum_info *csum_info; |
77bf5487 | 386 | struct ndis_tcp_lso_info *lso_info; |
08cd04bf KS |
387 | int hdr_offset; |
388 | u32 net_trans_info; | |
307f0995 | 389 | u32 hash; |
08cd04bf | 390 | |
fceaf24a | 391 | |
54a7357f KS |
392 | /* We will atmost need two pages to describe the rndis |
393 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number | |
394 | * of pages in a single packet. | |
395 | */ | |
8a00251a KS |
396 | num_data_pgs = netvsc_get_slots(skb) + 2; |
397 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { | |
54a7357f KS |
398 | netdev_err(net, "Packet too big: %u\n", skb->len); |
399 | dev_kfree_skb(skb); | |
400 | net->stats.tx_dropped++; | |
401 | return NETDEV_TX_OK; | |
402 | } | |
fceaf24a | 403 | |
454f18a9 | 404 | /* Allocate a netvsc packet based on # of frags. */ |
02fafbc6 | 405 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + |
8a00251a | 406 | (num_data_pgs * sizeof(struct hv_page_buffer)) + |
86eedacc | 407 | sizeof(struct rndis_message) + |
307f0995 HZ |
408 | NDIS_VLAN_PPI_SIZE + NDIS_CSUM_PPI_SIZE + |
409 | NDIS_LSO_PPI_SIZE + NDIS_HASH_PPI_SIZE, GFP_ATOMIC); | |
02fafbc6 | 410 | if (!packet) { |
bf769375 | 411 | /* out of memory, drop packet */ |
eb335bc4 | 412 | netdev_err(net, "unable to allocate hv_netvsc_packet\n"); |
b220f5f9 SH |
413 | |
414 | dev_kfree_skb(skb); | |
415 | net->stats.tx_dropped++; | |
bb6d5e76 | 416 | return NETDEV_TX_OK; |
fceaf24a HJ |
417 | } |
418 | ||
1f5f3a75 HZ |
419 | packet->vlan_tci = skb->vlan_tci; |
420 | ||
5b54dac8 HZ |
421 | packet->q_idx = skb_get_queue_mapping(skb); |
422 | ||
8a00251a | 423 | packet->is_data_pkt = true; |
4d447c9a | 424 | packet->total_data_buflen = skb->len; |
fceaf24a | 425 | |
8a00251a KS |
426 | packet->rndis_msg = (struct rndis_message *)((unsigned long)packet + |
427 | sizeof(struct hv_netvsc_packet) + | |
428 | (num_data_pgs * sizeof(struct hv_page_buffer))); | |
fceaf24a | 429 | |
454f18a9 | 430 | /* Set the completion routine */ |
893f6627 HZ |
431 | packet->send_completion = netvsc_xmit_completion; |
432 | packet->send_completion_ctx = packet; | |
433 | packet->send_completion_tid = (unsigned long)skb; | |
fceaf24a | 434 | |
8a00251a KS |
435 | isvlan = packet->vlan_tci & VLAN_TAG_PRESENT; |
436 | ||
437 | /* Add the rndis header */ | |
438 | rndis_msg = packet->rndis_msg; | |
439 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; | |
440 | rndis_msg->msg_len = packet->total_data_buflen; | |
441 | rndis_pkt = &rndis_msg->msg.pkt; | |
442 | rndis_pkt->data_offset = sizeof(struct rndis_packet); | |
443 | rndis_pkt->data_len = packet->total_data_buflen; | |
444 | rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); | |
445 | ||
446 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); | |
447 | ||
307f0995 HZ |
448 | hash = skb_get_hash_raw(skb); |
449 | if (hash != 0 && net->real_num_tx_queues > 1) { | |
450 | rndis_msg_size += NDIS_HASH_PPI_SIZE; | |
451 | ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE, | |
452 | NBL_HASH_VALUE); | |
453 | *(u32 *)((void *)ppi + ppi->ppi_offset) = hash; | |
454 | } | |
455 | ||
8a00251a KS |
456 | if (isvlan) { |
457 | struct ndis_pkt_8021q_info *vlan; | |
458 | ||
459 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; | |
460 | ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, | |
461 | IEEE_8021Q_INFO); | |
462 | vlan = (struct ndis_pkt_8021q_info *)((void *)ppi + | |
463 | ppi->ppi_offset); | |
464 | vlan->vlanid = packet->vlan_tci & VLAN_VID_MASK; | |
465 | vlan->pri = (packet->vlan_tci & VLAN_PRIO_MASK) >> | |
466 | VLAN_PRIO_SHIFT; | |
467 | } | |
468 | ||
08cd04bf KS |
469 | net_trans_info = get_net_transport_info(skb, &hdr_offset); |
470 | if (net_trans_info == TRANSPORT_INFO_NOT_IP) | |
471 | goto do_send; | |
472 | ||
473 | /* | |
474 | * Setup the sendside checksum offload only if this is not a | |
475 | * GSO packet. | |
476 | */ | |
477 | if (skb_is_gso(skb)) | |
77bf5487 | 478 | goto do_lso; |
08cd04bf | 479 | |
22041fb0 KS |
480 | if ((skb->ip_summed == CHECKSUM_NONE) || |
481 | (skb->ip_summed == CHECKSUM_UNNECESSARY)) | |
482 | goto do_send; | |
483 | ||
08cd04bf KS |
484 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; |
485 | ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, | |
486 | TCPIP_CHKSUM_PKTINFO); | |
487 | ||
488 | csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + | |
489 | ppi->ppi_offset); | |
490 | ||
491 | if (net_trans_info & (INFO_IPV4 << 16)) | |
492 | csum_info->transmit.is_ipv4 = 1; | |
493 | else | |
494 | csum_info->transmit.is_ipv6 = 1; | |
495 | ||
496 | if (net_trans_info & INFO_TCP) { | |
497 | csum_info->transmit.tcp_checksum = 1; | |
498 | csum_info->transmit.tcp_header_offset = hdr_offset; | |
499 | } else if (net_trans_info & INFO_UDP) { | |
af9893a3 KS |
500 | /* UDP checksum offload is not supported on ws2008r2. |
501 | * Furthermore, on ws2012 and ws2012r2, there are some | |
502 | * issues with udp checksum offload from Linux guests. | |
503 | * (these are host issues). | |
504 | * For now compute the checksum here. | |
505 | */ | |
506 | struct udphdr *uh; | |
507 | u16 udp_len; | |
508 | ||
509 | ret = skb_cow_head(skb, 0); | |
510 | if (ret) | |
511 | goto drop; | |
512 | ||
513 | uh = udp_hdr(skb); | |
514 | udp_len = ntohs(uh->len); | |
515 | uh->check = 0; | |
516 | uh->check = csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
517 | ip_hdr(skb)->daddr, | |
518 | udp_len, IPPROTO_UDP, | |
519 | csum_partial(uh, udp_len, 0)); | |
520 | if (uh->check == 0) | |
521 | uh->check = CSUM_MANGLED_0; | |
522 | ||
523 | csum_info->transmit.udp_checksum = 0; | |
08cd04bf | 524 | } |
77bf5487 KS |
525 | goto do_send; |
526 | ||
527 | do_lso: | |
528 | rndis_msg_size += NDIS_LSO_PPI_SIZE; | |
529 | ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, | |
530 | TCP_LARGESEND_PKTINFO); | |
531 | ||
532 | lso_info = (struct ndis_tcp_lso_info *)((void *)ppi + | |
533 | ppi->ppi_offset); | |
534 | ||
535 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; | |
536 | if (net_trans_info & (INFO_IPV4 << 16)) { | |
537 | lso_info->lso_v2_transmit.ip_version = | |
538 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; | |
539 | ip_hdr(skb)->tot_len = 0; | |
540 | ip_hdr(skb)->check = 0; | |
541 | tcp_hdr(skb)->check = | |
542 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
543 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
544 | } else { | |
545 | lso_info->lso_v2_transmit.ip_version = | |
546 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; | |
547 | ipv6_hdr(skb)->payload_len = 0; | |
548 | tcp_hdr(skb)->check = | |
549 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
550 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
551 | } | |
552 | lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset; | |
553 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; | |
08cd04bf KS |
554 | |
555 | do_send: | |
8a00251a KS |
556 | /* Start filling in the page buffers with the rndis hdr */ |
557 | rndis_msg->msg_len += rndis_msg_size; | |
558 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, | |
559 | skb, &packet->page_buf[0]); | |
560 | ||
561 | ret = netvsc_send(net_device_ctx->device_ctx, packet); | |
562 | ||
af9893a3 | 563 | drop: |
02fafbc6 | 564 | if (ret == 0) { |
b852fdce SH |
565 | net->stats.tx_bytes += skb->len; |
566 | net->stats.tx_packets++; | |
b220f5f9 | 567 | } else { |
8a5f9edc | 568 | kfree(packet); |
33be96e4 HZ |
569 | if (ret != -EAGAIN) { |
570 | dev_kfree_skb_any(skb); | |
571 | net->stats.tx_dropped++; | |
572 | } | |
fceaf24a HJ |
573 | } |
574 | ||
33be96e4 | 575 | return (ret == -EAGAIN) ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
fceaf24a HJ |
576 | } |
577 | ||
3e189519 | 578 | /* |
02fafbc6 GKH |
579 | * netvsc_linkstatus_callback - Link up/down notification |
580 | */ | |
90ef117a | 581 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
3a494e71 | 582 | struct rndis_message *resp) |
fceaf24a | 583 | { |
3a494e71 | 584 | struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
2ddd5e5f | 585 | struct net_device *net; |
c996edcf | 586 | struct net_device_context *ndev_ctx; |
2ddd5e5f | 587 | struct netvsc_device *net_device; |
891de74d | 588 | struct rndis_device *rdev; |
2ddd5e5f S |
589 | |
590 | net_device = hv_get_drvdata(device_obj); | |
891de74d HZ |
591 | rdev = net_device->extension; |
592 | ||
3a494e71 HZ |
593 | switch (indicate->status) { |
594 | case RNDIS_STATUS_MEDIA_CONNECT: | |
595 | rdev->link_state = false; | |
596 | break; | |
597 | case RNDIS_STATUS_MEDIA_DISCONNECT: | |
598 | rdev->link_state = true; | |
599 | break; | |
600 | case RNDIS_STATUS_NETWORK_CHANGE: | |
601 | rdev->link_change = true; | |
602 | break; | |
603 | default: | |
604 | return; | |
605 | } | |
891de74d | 606 | |
2ddd5e5f | 607 | net = net_device->ndev; |
fceaf24a | 608 | |
891de74d | 609 | if (!net || net->reg_state != NETREG_REGISTERED) |
fceaf24a | 610 | return; |
fceaf24a | 611 | |
891de74d | 612 | ndev_ctx = netdev_priv(net); |
3a494e71 | 613 | if (!rdev->link_state) { |
c4b6a2ea | 614 | schedule_delayed_work(&ndev_ctx->dwork, 0); |
122a5f64 | 615 | schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20)); |
02fafbc6 | 616 | } else { |
891de74d | 617 | schedule_delayed_work(&ndev_ctx->dwork, 0); |
fceaf24a | 618 | } |
fceaf24a HJ |
619 | } |
620 | ||
3e189519 HJ |
621 | /* |
622 | * netvsc_recv_callback - Callback when we receive a packet from the | |
623 | * "wire" on the specified device. | |
02fafbc6 | 624 | */ |
f79adf8f | 625 | int netvsc_recv_callback(struct hv_device *device_obj, |
e3d605ed KS |
626 | struct hv_netvsc_packet *packet, |
627 | struct ndis_tcp_ip_checksum_info *csum_info) | |
fceaf24a | 628 | { |
6f4c4446 | 629 | struct net_device *net; |
fceaf24a | 630 | struct sk_buff *skb; |
fceaf24a | 631 | |
6f4c4446 | 632 | net = ((struct netvsc_device *)hv_get_drvdata(device_obj))->ndev; |
a68f9614 | 633 | if (!net || net->reg_state != NETREG_REGISTERED) { |
63f6921d | 634 | packet->status = NVSP_STAT_FAIL; |
fceaf24a HJ |
635 | return 0; |
636 | } | |
637 | ||
9495c282 | 638 | /* Allocate a skb - TODO direct I/O to pages? */ |
72a2f5bd | 639 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
9495c282 SH |
640 | if (unlikely(!skb)) { |
641 | ++net->stats.rx_dropped; | |
63f6921d | 642 | packet->status = NVSP_STAT_FAIL; |
9495c282 SH |
643 | return 0; |
644 | } | |
fceaf24a | 645 | |
02fafbc6 GKH |
646 | /* |
647 | * Copy to skb. This copy is needed here since the memory pointed by | |
648 | * hv_netvsc_packet cannot be deallocated | |
649 | */ | |
45326342 HZ |
650 | memcpy(skb_put(skb, packet->total_data_buflen), packet->data, |
651 | packet->total_data_buflen); | |
fceaf24a HJ |
652 | |
653 | skb->protocol = eth_type_trans(skb, net); | |
e3d605ed KS |
654 | if (csum_info) { |
655 | /* We only look at the IP checksum here. | |
656 | * Should we be dropping the packet if checksum | |
657 | * failed? How do we deal with other checksums - TCP/UDP? | |
658 | */ | |
659 | if (csum_info->receive.ip_checksum_succeeded) | |
660 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
661 | else | |
662 | skb->ip_summed = CHECKSUM_NONE; | |
663 | } | |
664 | ||
93725cbd HZ |
665 | if (packet->vlan_tci & VLAN_TAG_PRESENT) |
666 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
667 | packet->vlan_tci); | |
fceaf24a | 668 | |
4baab261 | 669 | skb_record_rx_queue(skb, packet->channel-> |
e565e803 | 670 | offermsg.offer.sub_channel_index); |
5b54dac8 | 671 | |
9495c282 | 672 | net->stats.rx_packets++; |
48c38839 | 673 | net->stats.rx_bytes += packet->total_data_buflen; |
9495c282 | 674 | |
02fafbc6 GKH |
675 | /* |
676 | * Pass the skb back up. Network stack will deallocate the skb when it | |
9495c282 SH |
677 | * is done. |
678 | * TODO - use NAPI? | |
02fafbc6 | 679 | */ |
9495c282 | 680 | netif_rx(skb); |
fceaf24a | 681 | |
fceaf24a HJ |
682 | return 0; |
683 | } | |
684 | ||
f82f4ad7 SH |
685 | static void netvsc_get_drvinfo(struct net_device *net, |
686 | struct ethtool_drvinfo *info) | |
687 | { | |
7826d43f | 688 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 689 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
f82f4ad7 SH |
690 | } |
691 | ||
4d447c9a HZ |
692 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
693 | { | |
694 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
695 | struct hv_device *hdev = ndevctx->device_ctx; | |
696 | struct netvsc_device *nvdev = hv_get_drvdata(hdev); | |
697 | struct netvsc_device_info device_info; | |
698 | int limit = ETH_DATA_LEN; | |
699 | ||
700 | if (nvdev == NULL || nvdev->destroy) | |
701 | return -ENODEV; | |
702 | ||
a1eabb01 | 703 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) |
4d447c9a HZ |
704 | limit = NETVSC_MTU; |
705 | ||
706 | if (mtu < 68 || mtu > limit) | |
707 | return -EINVAL; | |
708 | ||
709 | nvdev->start_remove = true; | |
792df872 | 710 | cancel_work_sync(&ndevctx->work); |
0a282538 | 711 | netif_tx_disable(ndev); |
4d447c9a HZ |
712 | rndis_filter_device_remove(hdev); |
713 | ||
714 | ndev->mtu = mtu; | |
715 | ||
716 | ndevctx->device_ctx = hdev; | |
717 | hv_set_drvdata(hdev, ndev); | |
718 | device_info.ring_size = ring_size; | |
719 | rndis_filter_device_add(hdev, &device_info); | |
5b54dac8 | 720 | netif_tx_wake_all_queues(ndev); |
4d447c9a HZ |
721 | |
722 | return 0; | |
723 | } | |
724 | ||
1ce09e89 HZ |
725 | |
726 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
727 | { | |
728 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
729 | struct hv_device *hdev = ndevctx->device_ctx; | |
730 | struct sockaddr *addr = p; | |
9a4c831e | 731 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
732 | unsigned char save_aatype; |
733 | int err; | |
734 | ||
735 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
736 | save_aatype = ndev->addr_assign_type; | |
737 | ||
738 | err = eth_mac_addr(ndev, p); | |
739 | if (err != 0) | |
740 | return err; | |
741 | ||
742 | err = rndis_filter_set_device_mac(hdev, addr->sa_data); | |
743 | if (err != 0) { | |
744 | /* roll back to saved MAC */ | |
745 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
746 | ndev->addr_assign_type = save_aatype; | |
747 | } | |
748 | ||
749 | return err; | |
750 | } | |
751 | ||
752 | ||
f82f4ad7 SH |
753 | static const struct ethtool_ops ethtool_ops = { |
754 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 SH |
755 | .get_link = ethtool_op_get_link, |
756 | }; | |
757 | ||
df2fff28 GKH |
758 | static const struct net_device_ops device_ops = { |
759 | .ndo_open = netvsc_open, | |
760 | .ndo_stop = netvsc_close, | |
761 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 762 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 763 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 764 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 765 | .ndo_set_mac_address = netvsc_set_mac_addr, |
5b54dac8 | 766 | .ndo_select_queue = netvsc_select_queue, |
df2fff28 GKH |
767 | }; |
768 | ||
c996edcf HZ |
769 | /* |
770 | * Send GARP packet to network peers after migrations. | |
771 | * After Quick Migration, the network is not immediately operational in the | |
772 | * current context when receiving RNDIS_STATUS_MEDIA_CONNECT event. So, add | |
122a5f64 | 773 | * another netif_notify_peers() into a delayed work, otherwise GARP packet |
c996edcf | 774 | * will not be sent after quick migration, and cause network disconnection. |
891de74d | 775 | * Also, we update the carrier status here. |
c996edcf | 776 | */ |
891de74d | 777 | static void netvsc_link_change(struct work_struct *w) |
c996edcf HZ |
778 | { |
779 | struct net_device_context *ndev_ctx; | |
780 | struct net_device *net; | |
2ddd5e5f | 781 | struct netvsc_device *net_device; |
891de74d | 782 | struct rndis_device *rdev; |
3a494e71 HZ |
783 | bool notify, refresh = false; |
784 | char *argv[] = { "/etc/init.d/network", "restart", NULL }; | |
785 | char *envp[] = { "HOME=/", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL }; | |
891de74d HZ |
786 | |
787 | rtnl_lock(); | |
c996edcf | 788 | |
122a5f64 | 789 | ndev_ctx = container_of(w, struct net_device_context, dwork.work); |
2ddd5e5f | 790 | net_device = hv_get_drvdata(ndev_ctx->device_ctx); |
891de74d | 791 | rdev = net_device->extension; |
2ddd5e5f | 792 | net = net_device->ndev; |
891de74d HZ |
793 | |
794 | if (rdev->link_state) { | |
795 | netif_carrier_off(net); | |
796 | notify = false; | |
797 | } else { | |
798 | netif_carrier_on(net); | |
799 | notify = true; | |
3a494e71 HZ |
800 | if (rdev->link_change) { |
801 | rdev->link_change = false; | |
802 | refresh = true; | |
803 | } | |
891de74d HZ |
804 | } |
805 | ||
806 | rtnl_unlock(); | |
807 | ||
3a494e71 HZ |
808 | if (refresh) |
809 | call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC); | |
810 | ||
891de74d HZ |
811 | if (notify) |
812 | netdev_notify_peers(net); | |
c996edcf HZ |
813 | } |
814 | ||
815 | ||
84946899 S |
816 | static int netvsc_probe(struct hv_device *dev, |
817 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 818 | { |
df2fff28 GKH |
819 | struct net_device *net = NULL; |
820 | struct net_device_context *net_device_ctx; | |
821 | struct netvsc_device_info device_info; | |
5b54dac8 | 822 | struct netvsc_device *nvdev; |
df2fff28 GKH |
823 | int ret; |
824 | ||
5b54dac8 HZ |
825 | net = alloc_etherdev_mq(sizeof(struct net_device_context), |
826 | num_online_cpus()); | |
df2fff28 | 827 | if (!net) |
51a805d0 | 828 | return -ENOMEM; |
df2fff28 | 829 | |
1b07da51 HZ |
830 | netif_carrier_off(net); |
831 | ||
df2fff28 | 832 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 833 | net_device_ctx->device_ctx = dev; |
2ddd5e5f | 834 | hv_set_drvdata(dev, net); |
891de74d | 835 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
792df872 | 836 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
df2fff28 | 837 | |
df2fff28 GKH |
838 | net->netdev_ops = &device_ops; |
839 | ||
77bf5487 KS |
840 | net->hw_features = NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_IP_CSUM | |
841 | NETIF_F_TSO; | |
08cd04bf | 842 | net->features = NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_SG | NETIF_F_RXCSUM | |
77bf5487 | 843 | NETIF_F_IP_CSUM | NETIF_F_TSO; |
6048718d | 844 | |
7ad24ea4 | 845 | net->ethtool_ops = ðtool_ops; |
9efd21e1 | 846 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 847 | |
692e084e HZ |
848 | /* Notify the netvsc driver of the new device */ |
849 | device_info.ring_size = ring_size; | |
850 | ret = rndis_filter_device_add(dev, &device_info); | |
851 | if (ret != 0) { | |
852 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
df2fff28 | 853 | free_netdev(net); |
2ddd5e5f | 854 | hv_set_drvdata(dev, NULL); |
692e084e | 855 | return ret; |
df2fff28 | 856 | } |
692e084e HZ |
857 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
858 | ||
5b54dac8 HZ |
859 | nvdev = hv_get_drvdata(dev); |
860 | netif_set_real_num_tx_queues(net, nvdev->num_chn); | |
861 | netif_set_real_num_rx_queues(net, nvdev->num_chn); | |
5b54dac8 | 862 | |
a68f9614 HZ |
863 | ret = register_netdev(net); |
864 | if (ret != 0) { | |
865 | pr_err("Unable to register netdev.\n"); | |
866 | rndis_filter_device_remove(dev); | |
867 | free_netdev(net); | |
1b07da51 HZ |
868 | } else { |
869 | schedule_delayed_work(&net_device_ctx->dwork, 0); | |
a68f9614 HZ |
870 | } |
871 | ||
df2fff28 GKH |
872 | return ret; |
873 | } | |
874 | ||
415b023a | 875 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 876 | { |
2ddd5e5f | 877 | struct net_device *net; |
122a5f64 | 878 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
879 | struct netvsc_device *net_device; |
880 | ||
881 | net_device = hv_get_drvdata(dev); | |
882 | net = net_device->ndev; | |
df2fff28 | 883 | |
df2fff28 | 884 | if (net == NULL) { |
415b023a | 885 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
886 | return 0; |
887 | } | |
888 | ||
4d447c9a HZ |
889 | net_device->start_remove = true; |
890 | ||
122a5f64 HZ |
891 | ndev_ctx = netdev_priv(net); |
892 | cancel_delayed_work_sync(&ndev_ctx->dwork); | |
792df872 | 893 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 894 | |
df2fff28 | 895 | /* Stop outbound asap */ |
0a282538 | 896 | netif_tx_disable(net); |
df2fff28 GKH |
897 | |
898 | unregister_netdev(net); | |
899 | ||
900 | /* | |
901 | * Call to the vsc driver to let it know that the device is being | |
902 | * removed | |
903 | */ | |
df06bcff | 904 | rndis_filter_device_remove(dev); |
df2fff28 GKH |
905 | |
906 | free_netdev(net); | |
df06bcff | 907 | return 0; |
df2fff28 GKH |
908 | } |
909 | ||
345c4cc3 | 910 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 911 | /* Network guid */ |
8f505944 | 912 | { HV_NIC_GUID, }, |
c45cf2d4 | 913 | { }, |
345c4cc3 S |
914 | }; |
915 | ||
916 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
917 | ||
f1542a66 | 918 | /* The one and only one */ |
fde0ef9b | 919 | static struct hv_driver netvsc_drv = { |
d31b20fc | 920 | .name = KBUILD_MODNAME, |
345c4cc3 | 921 | .id_table = id_table, |
fde0ef9b S |
922 | .probe = netvsc_probe, |
923 | .remove = netvsc_remove, | |
d4890970 | 924 | }; |
f1542a66 | 925 | |
a9869c94 | 926 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 927 | { |
768fa219 | 928 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
929 | } |
930 | ||
1fde28cf | 931 | static int __init netvsc_drv_init(void) |
df2fff28 | 932 | { |
fa85a6c2 HZ |
933 | if (ring_size < RING_SIZE_MIN) { |
934 | ring_size = RING_SIZE_MIN; | |
935 | pr_info("Increased ring_size to %d (min allowed)\n", | |
936 | ring_size); | |
937 | } | |
768fa219 | 938 | return vmbus_driver_register(&netvsc_drv); |
df2fff28 GKH |
939 | } |
940 | ||
26c14cc1 | 941 | MODULE_LICENSE("GPL"); |
7880fc54 | 942 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 943 | |
1fde28cf | 944 | module_init(netvsc_drv_init); |
a9869c94 | 945 | module_exit(netvsc_drv_exit); |