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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 | ||
d515d0ff HZ |
104 | netif_start_queue(net); |
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 | ||
fceaf24a HJ |
152 | static void netvsc_xmit_completion(void *context) |
153 | { | |
4193d4f4 | 154 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
02fafbc6 | 155 | struct sk_buff *skb = (struct sk_buff *) |
72a2f5bd | 156 | (unsigned long)packet->completion.send.send_completion_tid; |
fceaf24a | 157 | |
fceaf24a HJ |
158 | kfree(packet); |
159 | ||
1d06825b | 160 | if (skb) |
b220f5f9 | 161 | dev_kfree_skb_any(skb); |
fceaf24a HJ |
162 | } |
163 | ||
54a7357f KS |
164 | static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
165 | struct hv_page_buffer *pb) | |
166 | { | |
167 | int j = 0; | |
168 | ||
169 | /* Deal with compund pages by ignoring unused part | |
170 | * of the page. | |
171 | */ | |
172 | page += (offset >> PAGE_SHIFT); | |
173 | offset &= ~PAGE_MASK; | |
174 | ||
175 | while (len > 0) { | |
176 | unsigned long bytes; | |
177 | ||
178 | bytes = PAGE_SIZE - offset; | |
179 | if (bytes > len) | |
180 | bytes = len; | |
181 | pb[j].pfn = page_to_pfn(page); | |
182 | pb[j].offset = offset; | |
183 | pb[j].len = bytes; | |
184 | ||
185 | offset += bytes; | |
186 | len -= bytes; | |
187 | ||
188 | if (offset == PAGE_SIZE && len) { | |
189 | page++; | |
190 | offset = 0; | |
191 | j++; | |
192 | } | |
193 | } | |
194 | ||
195 | return j + 1; | |
196 | } | |
197 | ||
8a00251a KS |
198 | static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
199 | struct hv_page_buffer *pb) | |
54a7357f KS |
200 | { |
201 | u32 slots_used = 0; | |
202 | char *data = skb->data; | |
203 | int frags = skb_shinfo(skb)->nr_frags; | |
204 | int i; | |
205 | ||
206 | /* The packet is laid out thus: | |
207 | * 1. hdr | |
208 | * 2. skb linear data | |
209 | * 3. skb fragment data | |
210 | */ | |
211 | if (hdr != NULL) | |
212 | slots_used += fill_pg_buf(virt_to_page(hdr), | |
213 | offset_in_page(hdr), | |
214 | len, &pb[slots_used]); | |
215 | ||
216 | slots_used += fill_pg_buf(virt_to_page(data), | |
217 | offset_in_page(data), | |
218 | skb_headlen(skb), &pb[slots_used]); | |
219 | ||
220 | for (i = 0; i < frags; i++) { | |
221 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
222 | ||
223 | slots_used += fill_pg_buf(skb_frag_page(frag), | |
224 | frag->page_offset, | |
225 | skb_frag_size(frag), &pb[slots_used]); | |
226 | } | |
8a00251a | 227 | return slots_used; |
54a7357f KS |
228 | } |
229 | ||
230 | static int count_skb_frag_slots(struct sk_buff *skb) | |
231 | { | |
232 | int i, frags = skb_shinfo(skb)->nr_frags; | |
233 | int pages = 0; | |
234 | ||
235 | for (i = 0; i < frags; i++) { | |
236 | skb_frag_t *frag = skb_shinfo(skb)->frags + i; | |
237 | unsigned long size = skb_frag_size(frag); | |
238 | unsigned long offset = frag->page_offset; | |
239 | ||
240 | /* Skip unused frames from start of page */ | |
241 | offset &= ~PAGE_MASK; | |
242 | pages += PFN_UP(offset + size); | |
243 | } | |
244 | return pages; | |
245 | } | |
246 | ||
247 | static int netvsc_get_slots(struct sk_buff *skb) | |
248 | { | |
249 | char *data = skb->data; | |
250 | unsigned int offset = offset_in_page(data); | |
251 | unsigned int len = skb_headlen(skb); | |
252 | int slots; | |
253 | int frag_slots; | |
254 | ||
255 | slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); | |
256 | frag_slots = count_skb_frag_slots(skb); | |
257 | return slots + frag_slots; | |
258 | } | |
259 | ||
08cd04bf KS |
260 | static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off) |
261 | { | |
262 | u32 ret_val = TRANSPORT_INFO_NOT_IP; | |
263 | ||
264 | if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) && | |
265 | (eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) { | |
266 | goto not_ip; | |
267 | } | |
268 | ||
269 | *trans_off = skb_transport_offset(skb); | |
270 | ||
271 | if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) { | |
272 | struct iphdr *iphdr = ip_hdr(skb); | |
273 | ||
274 | if (iphdr->protocol == IPPROTO_TCP) | |
275 | ret_val = TRANSPORT_INFO_IPV4_TCP; | |
276 | else if (iphdr->protocol == IPPROTO_UDP) | |
277 | ret_val = TRANSPORT_INFO_IPV4_UDP; | |
278 | } else { | |
279 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) | |
280 | ret_val = TRANSPORT_INFO_IPV6_TCP; | |
281 | else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) | |
282 | ret_val = TRANSPORT_INFO_IPV6_UDP; | |
283 | } | |
284 | ||
285 | not_ip: | |
286 | return ret_val; | |
287 | } | |
288 | ||
02fafbc6 | 289 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
fceaf24a | 290 | { |
fceaf24a | 291 | struct net_device_context *net_device_ctx = netdev_priv(net); |
4193d4f4 | 292 | struct hv_netvsc_packet *packet; |
02fafbc6 | 293 | int ret; |
8a00251a KS |
294 | unsigned int num_data_pgs; |
295 | struct rndis_message *rndis_msg; | |
296 | struct rndis_packet *rndis_pkt; | |
297 | u32 rndis_msg_size; | |
298 | bool isvlan; | |
299 | struct rndis_per_packet_info *ppi; | |
08cd04bf | 300 | struct ndis_tcp_ip_checksum_info *csum_info; |
77bf5487 | 301 | struct ndis_tcp_lso_info *lso_info; |
08cd04bf KS |
302 | int hdr_offset; |
303 | u32 net_trans_info; | |
304 | ||
fceaf24a | 305 | |
54a7357f KS |
306 | /* We will atmost need two pages to describe the rndis |
307 | * header. We can only transmit MAX_PAGE_BUFFER_COUNT number | |
308 | * of pages in a single packet. | |
309 | */ | |
8a00251a KS |
310 | num_data_pgs = netvsc_get_slots(skb) + 2; |
311 | if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { | |
54a7357f KS |
312 | netdev_err(net, "Packet too big: %u\n", skb->len); |
313 | dev_kfree_skb(skb); | |
314 | net->stats.tx_dropped++; | |
315 | return NETDEV_TX_OK; | |
316 | } | |
fceaf24a | 317 | |
454f18a9 | 318 | /* Allocate a netvsc packet based on # of frags. */ |
02fafbc6 | 319 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + |
8a00251a | 320 | (num_data_pgs * sizeof(struct hv_page_buffer)) + |
86eedacc | 321 | sizeof(struct rndis_message) + |
4276372f KS |
322 | NDIS_VLAN_PPI_SIZE + |
323 | NDIS_CSUM_PPI_SIZE + | |
324 | NDIS_LSO_PPI_SIZE, GFP_ATOMIC); | |
02fafbc6 | 325 | if (!packet) { |
bf769375 | 326 | /* out of memory, drop packet */ |
eb335bc4 | 327 | netdev_err(net, "unable to allocate hv_netvsc_packet\n"); |
b220f5f9 SH |
328 | |
329 | dev_kfree_skb(skb); | |
330 | net->stats.tx_dropped++; | |
bb6d5e76 | 331 | return NETDEV_TX_OK; |
fceaf24a HJ |
332 | } |
333 | ||
1f5f3a75 HZ |
334 | packet->vlan_tci = skb->vlan_tci; |
335 | ||
8a00251a | 336 | packet->is_data_pkt = true; |
4d447c9a | 337 | packet->total_data_buflen = skb->len; |
fceaf24a | 338 | |
8a00251a KS |
339 | packet->rndis_msg = (struct rndis_message *)((unsigned long)packet + |
340 | sizeof(struct hv_netvsc_packet) + | |
341 | (num_data_pgs * sizeof(struct hv_page_buffer))); | |
fceaf24a | 342 | |
454f18a9 | 343 | /* Set the completion routine */ |
72a2f5bd HZ |
344 | packet->completion.send.send_completion = netvsc_xmit_completion; |
345 | packet->completion.send.send_completion_ctx = packet; | |
346 | packet->completion.send.send_completion_tid = (unsigned long)skb; | |
fceaf24a | 347 | |
8a00251a KS |
348 | isvlan = packet->vlan_tci & VLAN_TAG_PRESENT; |
349 | ||
350 | /* Add the rndis header */ | |
351 | rndis_msg = packet->rndis_msg; | |
352 | rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; | |
353 | rndis_msg->msg_len = packet->total_data_buflen; | |
354 | rndis_pkt = &rndis_msg->msg.pkt; | |
355 | rndis_pkt->data_offset = sizeof(struct rndis_packet); | |
356 | rndis_pkt->data_len = packet->total_data_buflen; | |
357 | rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); | |
358 | ||
359 | rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); | |
360 | ||
361 | if (isvlan) { | |
362 | struct ndis_pkt_8021q_info *vlan; | |
363 | ||
364 | rndis_msg_size += NDIS_VLAN_PPI_SIZE; | |
365 | ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, | |
366 | IEEE_8021Q_INFO); | |
367 | vlan = (struct ndis_pkt_8021q_info *)((void *)ppi + | |
368 | ppi->ppi_offset); | |
369 | vlan->vlanid = packet->vlan_tci & VLAN_VID_MASK; | |
370 | vlan->pri = (packet->vlan_tci & VLAN_PRIO_MASK) >> | |
371 | VLAN_PRIO_SHIFT; | |
372 | } | |
373 | ||
08cd04bf KS |
374 | net_trans_info = get_net_transport_info(skb, &hdr_offset); |
375 | if (net_trans_info == TRANSPORT_INFO_NOT_IP) | |
376 | goto do_send; | |
377 | ||
378 | /* | |
379 | * Setup the sendside checksum offload only if this is not a | |
380 | * GSO packet. | |
381 | */ | |
382 | if (skb_is_gso(skb)) | |
77bf5487 | 383 | goto do_lso; |
08cd04bf KS |
384 | |
385 | rndis_msg_size += NDIS_CSUM_PPI_SIZE; | |
386 | ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, | |
387 | TCPIP_CHKSUM_PKTINFO); | |
388 | ||
389 | csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + | |
390 | ppi->ppi_offset); | |
391 | ||
392 | if (net_trans_info & (INFO_IPV4 << 16)) | |
393 | csum_info->transmit.is_ipv4 = 1; | |
394 | else | |
395 | csum_info->transmit.is_ipv6 = 1; | |
396 | ||
397 | if (net_trans_info & INFO_TCP) { | |
398 | csum_info->transmit.tcp_checksum = 1; | |
399 | csum_info->transmit.tcp_header_offset = hdr_offset; | |
400 | } else if (net_trans_info & INFO_UDP) { | |
af9893a3 KS |
401 | /* UDP checksum offload is not supported on ws2008r2. |
402 | * Furthermore, on ws2012 and ws2012r2, there are some | |
403 | * issues with udp checksum offload from Linux guests. | |
404 | * (these are host issues). | |
405 | * For now compute the checksum here. | |
406 | */ | |
407 | struct udphdr *uh; | |
408 | u16 udp_len; | |
409 | ||
410 | ret = skb_cow_head(skb, 0); | |
411 | if (ret) | |
412 | goto drop; | |
413 | ||
414 | uh = udp_hdr(skb); | |
415 | udp_len = ntohs(uh->len); | |
416 | uh->check = 0; | |
417 | uh->check = csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
418 | ip_hdr(skb)->daddr, | |
419 | udp_len, IPPROTO_UDP, | |
420 | csum_partial(uh, udp_len, 0)); | |
421 | if (uh->check == 0) | |
422 | uh->check = CSUM_MANGLED_0; | |
423 | ||
424 | csum_info->transmit.udp_checksum = 0; | |
08cd04bf | 425 | } |
77bf5487 KS |
426 | goto do_send; |
427 | ||
428 | do_lso: | |
429 | rndis_msg_size += NDIS_LSO_PPI_SIZE; | |
430 | ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, | |
431 | TCP_LARGESEND_PKTINFO); | |
432 | ||
433 | lso_info = (struct ndis_tcp_lso_info *)((void *)ppi + | |
434 | ppi->ppi_offset); | |
435 | ||
436 | lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; | |
437 | if (net_trans_info & (INFO_IPV4 << 16)) { | |
438 | lso_info->lso_v2_transmit.ip_version = | |
439 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; | |
440 | ip_hdr(skb)->tot_len = 0; | |
441 | ip_hdr(skb)->check = 0; | |
442 | tcp_hdr(skb)->check = | |
443 | ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
444 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
445 | } else { | |
446 | lso_info->lso_v2_transmit.ip_version = | |
447 | NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; | |
448 | ipv6_hdr(skb)->payload_len = 0; | |
449 | tcp_hdr(skb)->check = | |
450 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
451 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
452 | } | |
453 | lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset; | |
454 | lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; | |
08cd04bf KS |
455 | |
456 | do_send: | |
8a00251a KS |
457 | /* Start filling in the page buffers with the rndis hdr */ |
458 | rndis_msg->msg_len += rndis_msg_size; | |
459 | packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, | |
460 | skb, &packet->page_buf[0]); | |
461 | ||
462 | ret = netvsc_send(net_device_ctx->device_ctx, packet); | |
463 | ||
af9893a3 | 464 | drop: |
02fafbc6 | 465 | if (ret == 0) { |
b852fdce SH |
466 | net->stats.tx_bytes += skb->len; |
467 | net->stats.tx_packets++; | |
b220f5f9 | 468 | } else { |
8a5f9edc | 469 | kfree(packet); |
33be96e4 HZ |
470 | if (ret != -EAGAIN) { |
471 | dev_kfree_skb_any(skb); | |
472 | net->stats.tx_dropped++; | |
473 | } | |
fceaf24a HJ |
474 | } |
475 | ||
33be96e4 | 476 | return (ret == -EAGAIN) ? NETDEV_TX_BUSY : NETDEV_TX_OK; |
fceaf24a HJ |
477 | } |
478 | ||
3e189519 | 479 | /* |
02fafbc6 GKH |
480 | * netvsc_linkstatus_callback - Link up/down notification |
481 | */ | |
90ef117a | 482 | void netvsc_linkstatus_callback(struct hv_device *device_obj, |
02fafbc6 | 483 | unsigned int status) |
fceaf24a | 484 | { |
2ddd5e5f | 485 | struct net_device *net; |
c996edcf | 486 | struct net_device_context *ndev_ctx; |
2ddd5e5f | 487 | struct netvsc_device *net_device; |
891de74d | 488 | struct rndis_device *rdev; |
2ddd5e5f S |
489 | |
490 | net_device = hv_get_drvdata(device_obj); | |
891de74d HZ |
491 | rdev = net_device->extension; |
492 | ||
493 | rdev->link_state = status != 1; | |
494 | ||
2ddd5e5f | 495 | net = net_device->ndev; |
fceaf24a | 496 | |
891de74d | 497 | if (!net || net->reg_state != NETREG_REGISTERED) |
fceaf24a | 498 | return; |
fceaf24a | 499 | |
891de74d | 500 | ndev_ctx = netdev_priv(net); |
02fafbc6 | 501 | if (status == 1) { |
c4b6a2ea | 502 | schedule_delayed_work(&ndev_ctx->dwork, 0); |
122a5f64 | 503 | schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20)); |
02fafbc6 | 504 | } else { |
891de74d | 505 | schedule_delayed_work(&ndev_ctx->dwork, 0); |
fceaf24a | 506 | } |
fceaf24a HJ |
507 | } |
508 | ||
3e189519 HJ |
509 | /* |
510 | * netvsc_recv_callback - Callback when we receive a packet from the | |
511 | * "wire" on the specified device. | |
02fafbc6 | 512 | */ |
f79adf8f | 513 | int netvsc_recv_callback(struct hv_device *device_obj, |
e3d605ed KS |
514 | struct hv_netvsc_packet *packet, |
515 | struct ndis_tcp_ip_checksum_info *csum_info) | |
fceaf24a | 516 | { |
6f4c4446 | 517 | struct net_device *net; |
fceaf24a | 518 | struct sk_buff *skb; |
fceaf24a | 519 | |
6f4c4446 | 520 | net = ((struct netvsc_device *)hv_get_drvdata(device_obj))->ndev; |
a68f9614 | 521 | if (!net || net->reg_state != NETREG_REGISTERED) { |
63f6921d | 522 | packet->status = NVSP_STAT_FAIL; |
fceaf24a HJ |
523 | return 0; |
524 | } | |
525 | ||
9495c282 | 526 | /* Allocate a skb - TODO direct I/O to pages? */ |
72a2f5bd | 527 | skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen); |
9495c282 SH |
528 | if (unlikely(!skb)) { |
529 | ++net->stats.rx_dropped; | |
63f6921d | 530 | packet->status = NVSP_STAT_FAIL; |
9495c282 SH |
531 | return 0; |
532 | } | |
fceaf24a | 533 | |
02fafbc6 GKH |
534 | /* |
535 | * Copy to skb. This copy is needed here since the memory pointed by | |
536 | * hv_netvsc_packet cannot be deallocated | |
537 | */ | |
45326342 HZ |
538 | memcpy(skb_put(skb, packet->total_data_buflen), packet->data, |
539 | packet->total_data_buflen); | |
fceaf24a HJ |
540 | |
541 | skb->protocol = eth_type_trans(skb, net); | |
e3d605ed KS |
542 | if (csum_info) { |
543 | /* We only look at the IP checksum here. | |
544 | * Should we be dropping the packet if checksum | |
545 | * failed? How do we deal with other checksums - TCP/UDP? | |
546 | */ | |
547 | if (csum_info->receive.ip_checksum_succeeded) | |
548 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
549 | else | |
550 | skb->ip_summed = CHECKSUM_NONE; | |
551 | } | |
552 | ||
93725cbd HZ |
553 | if (packet->vlan_tci & VLAN_TAG_PRESENT) |
554 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
555 | packet->vlan_tci); | |
fceaf24a | 556 | |
9495c282 | 557 | net->stats.rx_packets++; |
48c38839 | 558 | net->stats.rx_bytes += packet->total_data_buflen; |
9495c282 | 559 | |
02fafbc6 GKH |
560 | /* |
561 | * Pass the skb back up. Network stack will deallocate the skb when it | |
9495c282 SH |
562 | * is done. |
563 | * TODO - use NAPI? | |
02fafbc6 | 564 | */ |
9495c282 | 565 | netif_rx(skb); |
fceaf24a | 566 | |
fceaf24a HJ |
567 | return 0; |
568 | } | |
569 | ||
f82f4ad7 SH |
570 | static void netvsc_get_drvinfo(struct net_device *net, |
571 | struct ethtool_drvinfo *info) | |
572 | { | |
7826d43f | 573 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
7826d43f | 574 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
f82f4ad7 SH |
575 | } |
576 | ||
4d447c9a HZ |
577 | static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
578 | { | |
579 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
580 | struct hv_device *hdev = ndevctx->device_ctx; | |
581 | struct netvsc_device *nvdev = hv_get_drvdata(hdev); | |
582 | struct netvsc_device_info device_info; | |
583 | int limit = ETH_DATA_LEN; | |
584 | ||
585 | if (nvdev == NULL || nvdev->destroy) | |
586 | return -ENODEV; | |
587 | ||
a1eabb01 | 588 | if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) |
4d447c9a HZ |
589 | limit = NETVSC_MTU; |
590 | ||
591 | if (mtu < 68 || mtu > limit) | |
592 | return -EINVAL; | |
593 | ||
594 | nvdev->start_remove = true; | |
792df872 | 595 | cancel_work_sync(&ndevctx->work); |
0a282538 | 596 | netif_tx_disable(ndev); |
4d447c9a HZ |
597 | rndis_filter_device_remove(hdev); |
598 | ||
599 | ndev->mtu = mtu; | |
600 | ||
601 | ndevctx->device_ctx = hdev; | |
602 | hv_set_drvdata(hdev, ndev); | |
603 | device_info.ring_size = ring_size; | |
604 | rndis_filter_device_add(hdev, &device_info); | |
605 | netif_wake_queue(ndev); | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
1ce09e89 HZ |
610 | |
611 | static int netvsc_set_mac_addr(struct net_device *ndev, void *p) | |
612 | { | |
613 | struct net_device_context *ndevctx = netdev_priv(ndev); | |
614 | struct hv_device *hdev = ndevctx->device_ctx; | |
615 | struct sockaddr *addr = p; | |
9a4c831e | 616 | char save_adr[ETH_ALEN]; |
1ce09e89 HZ |
617 | unsigned char save_aatype; |
618 | int err; | |
619 | ||
620 | memcpy(save_adr, ndev->dev_addr, ETH_ALEN); | |
621 | save_aatype = ndev->addr_assign_type; | |
622 | ||
623 | err = eth_mac_addr(ndev, p); | |
624 | if (err != 0) | |
625 | return err; | |
626 | ||
627 | err = rndis_filter_set_device_mac(hdev, addr->sa_data); | |
628 | if (err != 0) { | |
629 | /* roll back to saved MAC */ | |
630 | memcpy(ndev->dev_addr, save_adr, ETH_ALEN); | |
631 | ndev->addr_assign_type = save_aatype; | |
632 | } | |
633 | ||
634 | return err; | |
635 | } | |
636 | ||
637 | ||
f82f4ad7 SH |
638 | static const struct ethtool_ops ethtool_ops = { |
639 | .get_drvinfo = netvsc_get_drvinfo, | |
f82f4ad7 SH |
640 | .get_link = ethtool_op_get_link, |
641 | }; | |
642 | ||
df2fff28 GKH |
643 | static const struct net_device_ops device_ops = { |
644 | .ndo_open = netvsc_open, | |
645 | .ndo_stop = netvsc_close, | |
646 | .ndo_start_xmit = netvsc_start_xmit, | |
afc4b13d | 647 | .ndo_set_rx_mode = netvsc_set_multicast_list, |
4d447c9a | 648 | .ndo_change_mtu = netvsc_change_mtu, |
b681b588 | 649 | .ndo_validate_addr = eth_validate_addr, |
1ce09e89 | 650 | .ndo_set_mac_address = netvsc_set_mac_addr, |
df2fff28 GKH |
651 | }; |
652 | ||
c996edcf HZ |
653 | /* |
654 | * Send GARP packet to network peers after migrations. | |
655 | * After Quick Migration, the network is not immediately operational in the | |
656 | * current context when receiving RNDIS_STATUS_MEDIA_CONNECT event. So, add | |
122a5f64 | 657 | * another netif_notify_peers() into a delayed work, otherwise GARP packet |
c996edcf | 658 | * will not be sent after quick migration, and cause network disconnection. |
891de74d | 659 | * Also, we update the carrier status here. |
c996edcf | 660 | */ |
891de74d | 661 | static void netvsc_link_change(struct work_struct *w) |
c996edcf HZ |
662 | { |
663 | struct net_device_context *ndev_ctx; | |
664 | struct net_device *net; | |
2ddd5e5f | 665 | struct netvsc_device *net_device; |
891de74d HZ |
666 | struct rndis_device *rdev; |
667 | bool notify; | |
668 | ||
669 | rtnl_lock(); | |
c996edcf | 670 | |
122a5f64 | 671 | ndev_ctx = container_of(w, struct net_device_context, dwork.work); |
2ddd5e5f | 672 | net_device = hv_get_drvdata(ndev_ctx->device_ctx); |
891de74d | 673 | rdev = net_device->extension; |
2ddd5e5f | 674 | net = net_device->ndev; |
891de74d HZ |
675 | |
676 | if (rdev->link_state) { | |
677 | netif_carrier_off(net); | |
678 | notify = false; | |
679 | } else { | |
680 | netif_carrier_on(net); | |
681 | notify = true; | |
682 | } | |
683 | ||
684 | rtnl_unlock(); | |
685 | ||
686 | if (notify) | |
687 | netdev_notify_peers(net); | |
c996edcf HZ |
688 | } |
689 | ||
690 | ||
84946899 S |
691 | static int netvsc_probe(struct hv_device *dev, |
692 | const struct hv_vmbus_device_id *dev_id) | |
df2fff28 | 693 | { |
df2fff28 GKH |
694 | struct net_device *net = NULL; |
695 | struct net_device_context *net_device_ctx; | |
696 | struct netvsc_device_info device_info; | |
697 | int ret; | |
698 | ||
546d9e10 | 699 | net = alloc_etherdev(sizeof(struct net_device_context)); |
df2fff28 | 700 | if (!net) |
51a805d0 | 701 | return -ENOMEM; |
df2fff28 | 702 | |
1b07da51 HZ |
703 | netif_carrier_off(net); |
704 | ||
df2fff28 | 705 | net_device_ctx = netdev_priv(net); |
9efd21e1 | 706 | net_device_ctx->device_ctx = dev; |
2ddd5e5f | 707 | hv_set_drvdata(dev, net); |
891de74d | 708 | INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
792df872 | 709 | INIT_WORK(&net_device_ctx->work, do_set_multicast); |
df2fff28 | 710 | |
df2fff28 GKH |
711 | net->netdev_ops = &device_ops; |
712 | ||
77bf5487 KS |
713 | net->hw_features = NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_IP_CSUM | |
714 | NETIF_F_TSO; | |
08cd04bf | 715 | net->features = NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_SG | NETIF_F_RXCSUM | |
77bf5487 | 716 | NETIF_F_IP_CSUM | NETIF_F_TSO; |
6048718d | 717 | |
f82f4ad7 | 718 | SET_ETHTOOL_OPS(net, ðtool_ops); |
9efd21e1 | 719 | SET_NETDEV_DEV(net, &dev->device); |
df2fff28 | 720 | |
692e084e HZ |
721 | /* Notify the netvsc driver of the new device */ |
722 | device_info.ring_size = ring_size; | |
723 | ret = rndis_filter_device_add(dev, &device_info); | |
724 | if (ret != 0) { | |
725 | netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); | |
df2fff28 | 726 | free_netdev(net); |
2ddd5e5f | 727 | hv_set_drvdata(dev, NULL); |
692e084e | 728 | return ret; |
df2fff28 | 729 | } |
692e084e HZ |
730 | memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); |
731 | ||
a68f9614 HZ |
732 | ret = register_netdev(net); |
733 | if (ret != 0) { | |
734 | pr_err("Unable to register netdev.\n"); | |
735 | rndis_filter_device_remove(dev); | |
736 | free_netdev(net); | |
1b07da51 HZ |
737 | } else { |
738 | schedule_delayed_work(&net_device_ctx->dwork, 0); | |
a68f9614 HZ |
739 | } |
740 | ||
df2fff28 GKH |
741 | return ret; |
742 | } | |
743 | ||
415b023a | 744 | static int netvsc_remove(struct hv_device *dev) |
df2fff28 | 745 | { |
2ddd5e5f | 746 | struct net_device *net; |
122a5f64 | 747 | struct net_device_context *ndev_ctx; |
2ddd5e5f S |
748 | struct netvsc_device *net_device; |
749 | ||
750 | net_device = hv_get_drvdata(dev); | |
751 | net = net_device->ndev; | |
df2fff28 | 752 | |
df2fff28 | 753 | if (net == NULL) { |
415b023a | 754 | dev_err(&dev->device, "No net device to remove\n"); |
df2fff28 GKH |
755 | return 0; |
756 | } | |
757 | ||
4d447c9a HZ |
758 | net_device->start_remove = true; |
759 | ||
122a5f64 HZ |
760 | ndev_ctx = netdev_priv(net); |
761 | cancel_delayed_work_sync(&ndev_ctx->dwork); | |
792df872 | 762 | cancel_work_sync(&ndev_ctx->work); |
122a5f64 | 763 | |
df2fff28 | 764 | /* Stop outbound asap */ |
0a282538 | 765 | netif_tx_disable(net); |
df2fff28 GKH |
766 | |
767 | unregister_netdev(net); | |
768 | ||
769 | /* | |
770 | * Call to the vsc driver to let it know that the device is being | |
771 | * removed | |
772 | */ | |
df06bcff | 773 | rndis_filter_device_remove(dev); |
df2fff28 GKH |
774 | |
775 | free_netdev(net); | |
df06bcff | 776 | return 0; |
df2fff28 GKH |
777 | } |
778 | ||
345c4cc3 | 779 | static const struct hv_vmbus_device_id id_table[] = { |
c45cf2d4 | 780 | /* Network guid */ |
8f505944 | 781 | { HV_NIC_GUID, }, |
c45cf2d4 | 782 | { }, |
345c4cc3 S |
783 | }; |
784 | ||
785 | MODULE_DEVICE_TABLE(vmbus, id_table); | |
786 | ||
f1542a66 | 787 | /* The one and only one */ |
fde0ef9b | 788 | static struct hv_driver netvsc_drv = { |
d31b20fc | 789 | .name = KBUILD_MODNAME, |
345c4cc3 | 790 | .id_table = id_table, |
fde0ef9b S |
791 | .probe = netvsc_probe, |
792 | .remove = netvsc_remove, | |
d4890970 | 793 | }; |
f1542a66 | 794 | |
a9869c94 | 795 | static void __exit netvsc_drv_exit(void) |
fceaf24a | 796 | { |
768fa219 | 797 | vmbus_driver_unregister(&netvsc_drv); |
fceaf24a HJ |
798 | } |
799 | ||
1fde28cf | 800 | static int __init netvsc_drv_init(void) |
df2fff28 | 801 | { |
fa85a6c2 HZ |
802 | if (ring_size < RING_SIZE_MIN) { |
803 | ring_size = RING_SIZE_MIN; | |
804 | pr_info("Increased ring_size to %d (min allowed)\n", | |
805 | ring_size); | |
806 | } | |
768fa219 | 807 | return vmbus_driver_register(&netvsc_drv); |
df2fff28 GKH |
808 | } |
809 | ||
26c14cc1 | 810 | MODULE_LICENSE("GPL"); |
7880fc54 | 811 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
fceaf24a | 812 | |
1fde28cf | 813 | module_init(netvsc_drv_init); |
a9869c94 | 814 | module_exit(netvsc_drv_exit); |