This source file includes following definitions.
- get_rndis_device
- get_rndis_request
- put_rndis_request
- dump_rndis_message
- rndis_filter_send_request
- rndis_set_link_state
- rndis_filter_receive_response
- rndis_get_ppi
- rsc_add_data
- rndis_filter_receive_data
- rndis_filter_receive
- rndis_filter_query_device
- rndis_query_hwcaps
- rndis_filter_query_device_mac
- rndis_filter_set_device_mac
- rndis_filter_set_offload_params
- rndis_set_rss_param_msg
- rndis_filter_set_rss_param
- rndis_filter_query_device_link_status
- rndis_filter_query_link_speed
- rndis_filter_set_packet_filter
- rndis_set_multicast
- rndis_filter_update
- rndis_filter_init_device
- netvsc_device_idle
- rndis_filter_halt_device
- rndis_filter_open_device
- rndis_filter_close_device
- netvsc_sc_open
- rndis_set_subchannel
- rndis_netdev_set_hwcaps
- rndis_get_friendly_name
- rndis_filter_device_add
- rndis_filter_device_remove
- rndis_filter_open
- rndis_filter_close
1
2
3
4
5
6
7
8
9 #include <linux/kernel.h>
10 #include <linux/sched.h>
11 #include <linux/wait.h>
12 #include <linux/highmem.h>
13 #include <linux/slab.h>
14 #include <linux/io.h>
15 #include <linux/if_ether.h>
16 #include <linux/netdevice.h>
17 #include <linux/if_vlan.h>
18 #include <linux/nls.h>
19 #include <linux/vmalloc.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/ucs2_string.h>
22
23 #include "hyperv_net.h"
24 #include "netvsc_trace.h"
25
26 static void rndis_set_multicast(struct work_struct *w);
27
28 #define RNDIS_EXT_LEN PAGE_SIZE
29 struct rndis_request {
30 struct list_head list_ent;
31 struct completion wait_event;
32
33 struct rndis_message response_msg;
34
35
36
37
38
39
40 u8 response_ext[RNDIS_EXT_LEN];
41
42
43 struct hv_netvsc_packet pkt;
44
45 struct rndis_message request_msg;
46
47
48
49
50 u8 request_ext[RNDIS_EXT_LEN];
51 };
52
53 static const u8 netvsc_hash_key[NETVSC_HASH_KEYLEN] = {
54 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
55 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
56 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
57 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
58 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa
59 };
60
61 static struct rndis_device *get_rndis_device(void)
62 {
63 struct rndis_device *device;
64
65 device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
66 if (!device)
67 return NULL;
68
69 spin_lock_init(&device->request_lock);
70
71 INIT_LIST_HEAD(&device->req_list);
72 INIT_WORK(&device->mcast_work, rndis_set_multicast);
73
74 device->state = RNDIS_DEV_UNINITIALIZED;
75
76 return device;
77 }
78
79 static struct rndis_request *get_rndis_request(struct rndis_device *dev,
80 u32 msg_type,
81 u32 msg_len)
82 {
83 struct rndis_request *request;
84 struct rndis_message *rndis_msg;
85 struct rndis_set_request *set;
86 unsigned long flags;
87
88 request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
89 if (!request)
90 return NULL;
91
92 init_completion(&request->wait_event);
93
94 rndis_msg = &request->request_msg;
95 rndis_msg->ndis_msg_type = msg_type;
96 rndis_msg->msg_len = msg_len;
97
98 request->pkt.q_idx = 0;
99
100
101
102
103
104
105 set = &rndis_msg->msg.set_req;
106 set->req_id = atomic_inc_return(&dev->new_req_id);
107
108
109 spin_lock_irqsave(&dev->request_lock, flags);
110 list_add_tail(&request->list_ent, &dev->req_list);
111 spin_unlock_irqrestore(&dev->request_lock, flags);
112
113 return request;
114 }
115
116 static void put_rndis_request(struct rndis_device *dev,
117 struct rndis_request *req)
118 {
119 unsigned long flags;
120
121 spin_lock_irqsave(&dev->request_lock, flags);
122 list_del(&req->list_ent);
123 spin_unlock_irqrestore(&dev->request_lock, flags);
124
125 kfree(req);
126 }
127
128 static void dump_rndis_message(struct net_device *netdev,
129 const struct rndis_message *rndis_msg)
130 {
131 switch (rndis_msg->ndis_msg_type) {
132 case RNDIS_MSG_PACKET:
133 netdev_dbg(netdev, "RNDIS_MSG_PACKET (len %u, "
134 "data offset %u data len %u, # oob %u, "
135 "oob offset %u, oob len %u, pkt offset %u, "
136 "pkt len %u\n",
137 rndis_msg->msg_len,
138 rndis_msg->msg.pkt.data_offset,
139 rndis_msg->msg.pkt.data_len,
140 rndis_msg->msg.pkt.num_oob_data_elements,
141 rndis_msg->msg.pkt.oob_data_offset,
142 rndis_msg->msg.pkt.oob_data_len,
143 rndis_msg->msg.pkt.per_pkt_info_offset,
144 rndis_msg->msg.pkt.per_pkt_info_len);
145 break;
146
147 case RNDIS_MSG_INIT_C:
148 netdev_dbg(netdev, "RNDIS_MSG_INIT_C "
149 "(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
150 "device flags %d, max xfer size 0x%x, max pkts %u, "
151 "pkt aligned %u)\n",
152 rndis_msg->msg_len,
153 rndis_msg->msg.init_complete.req_id,
154 rndis_msg->msg.init_complete.status,
155 rndis_msg->msg.init_complete.major_ver,
156 rndis_msg->msg.init_complete.minor_ver,
157 rndis_msg->msg.init_complete.dev_flags,
158 rndis_msg->msg.init_complete.max_xfer_size,
159 rndis_msg->msg.init_complete.
160 max_pkt_per_msg,
161 rndis_msg->msg.init_complete.
162 pkt_alignment_factor);
163 break;
164
165 case RNDIS_MSG_QUERY_C:
166 netdev_dbg(netdev, "RNDIS_MSG_QUERY_C "
167 "(len %u, id 0x%x, status 0x%x, buf len %u, "
168 "buf offset %u)\n",
169 rndis_msg->msg_len,
170 rndis_msg->msg.query_complete.req_id,
171 rndis_msg->msg.query_complete.status,
172 rndis_msg->msg.query_complete.
173 info_buflen,
174 rndis_msg->msg.query_complete.
175 info_buf_offset);
176 break;
177
178 case RNDIS_MSG_SET_C:
179 netdev_dbg(netdev,
180 "RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
181 rndis_msg->msg_len,
182 rndis_msg->msg.set_complete.req_id,
183 rndis_msg->msg.set_complete.status);
184 break;
185
186 case RNDIS_MSG_INDICATE:
187 netdev_dbg(netdev, "RNDIS_MSG_INDICATE "
188 "(len %u, status 0x%x, buf len %u, buf offset %u)\n",
189 rndis_msg->msg_len,
190 rndis_msg->msg.indicate_status.status,
191 rndis_msg->msg.indicate_status.status_buflen,
192 rndis_msg->msg.indicate_status.status_buf_offset);
193 break;
194
195 default:
196 netdev_dbg(netdev, "0x%x (len %u)\n",
197 rndis_msg->ndis_msg_type,
198 rndis_msg->msg_len);
199 break;
200 }
201 }
202
203 static int rndis_filter_send_request(struct rndis_device *dev,
204 struct rndis_request *req)
205 {
206 struct hv_netvsc_packet *packet;
207 struct hv_page_buffer page_buf[2];
208 struct hv_page_buffer *pb = page_buf;
209 int ret;
210
211
212 packet = &req->pkt;
213
214 packet->total_data_buflen = req->request_msg.msg_len;
215 packet->page_buf_cnt = 1;
216
217 pb[0].pfn = virt_to_phys(&req->request_msg) >>
218 PAGE_SHIFT;
219 pb[0].len = req->request_msg.msg_len;
220 pb[0].offset =
221 (unsigned long)&req->request_msg & (PAGE_SIZE - 1);
222
223
224 if (pb[0].offset + pb[0].len > PAGE_SIZE) {
225 packet->page_buf_cnt++;
226 pb[0].len = PAGE_SIZE -
227 pb[0].offset;
228 pb[1].pfn = virt_to_phys((void *)&req->request_msg
229 + pb[0].len) >> PAGE_SHIFT;
230 pb[1].offset = 0;
231 pb[1].len = req->request_msg.msg_len -
232 pb[0].len;
233 }
234
235 trace_rndis_send(dev->ndev, 0, &req->request_msg);
236
237 rcu_read_lock_bh();
238 ret = netvsc_send(dev->ndev, packet, NULL, pb, NULL);
239 rcu_read_unlock_bh();
240
241 return ret;
242 }
243
244 static void rndis_set_link_state(struct rndis_device *rdev,
245 struct rndis_request *request)
246 {
247 u32 link_status;
248 struct rndis_query_complete *query_complete;
249
250 query_complete = &request->response_msg.msg.query_complete;
251
252 if (query_complete->status == RNDIS_STATUS_SUCCESS &&
253 query_complete->info_buflen == sizeof(u32)) {
254 memcpy(&link_status, (void *)((unsigned long)query_complete +
255 query_complete->info_buf_offset), sizeof(u32));
256 rdev->link_state = link_status != 0;
257 }
258 }
259
260 static void rndis_filter_receive_response(struct net_device *ndev,
261 struct netvsc_device *nvdev,
262 const struct rndis_message *resp)
263 {
264 struct rndis_device *dev = nvdev->extension;
265 struct rndis_request *request = NULL;
266 bool found = false;
267 unsigned long flags;
268
269
270
271
272 if (dev->state == RNDIS_DEV_UNINITIALIZED) {
273 netdev_err(ndev,
274 "got rndis message uninitialized\n");
275 return;
276 }
277
278 spin_lock_irqsave(&dev->request_lock, flags);
279 list_for_each_entry(request, &dev->req_list, list_ent) {
280
281
282
283
284 if (request->request_msg.msg.init_req.req_id
285 == resp->msg.init_complete.req_id) {
286 found = true;
287 break;
288 }
289 }
290 spin_unlock_irqrestore(&dev->request_lock, flags);
291
292 if (found) {
293 if (resp->msg_len <=
294 sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
295 memcpy(&request->response_msg, resp,
296 resp->msg_len);
297 if (request->request_msg.ndis_msg_type ==
298 RNDIS_MSG_QUERY && request->request_msg.msg.
299 query_req.oid == RNDIS_OID_GEN_MEDIA_CONNECT_STATUS)
300 rndis_set_link_state(dev, request);
301 } else {
302 netdev_err(ndev,
303 "rndis response buffer overflow "
304 "detected (size %u max %zu)\n",
305 resp->msg_len,
306 sizeof(struct rndis_message));
307
308 if (resp->ndis_msg_type ==
309 RNDIS_MSG_RESET_C) {
310
311 request->response_msg.msg.reset_complete.
312 status = RNDIS_STATUS_BUFFER_OVERFLOW;
313 } else {
314 request->response_msg.msg.
315 init_complete.status =
316 RNDIS_STATUS_BUFFER_OVERFLOW;
317 }
318 }
319
320 complete(&request->wait_event);
321 } else {
322 netdev_err(ndev,
323 "no rndis request found for this response "
324 "(id 0x%x res type 0x%x)\n",
325 resp->msg.init_complete.req_id,
326 resp->ndis_msg_type);
327 }
328 }
329
330
331
332
333
334 static inline void *rndis_get_ppi(struct rndis_packet *rpkt,
335 u32 type, u8 internal)
336 {
337 struct rndis_per_packet_info *ppi;
338 int len;
339
340 if (rpkt->per_pkt_info_offset == 0)
341 return NULL;
342
343 ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
344 rpkt->per_pkt_info_offset);
345 len = rpkt->per_pkt_info_len;
346
347 while (len > 0) {
348 if (ppi->type == type && ppi->internal == internal)
349 return (void *)((ulong)ppi + ppi->ppi_offset);
350 len -= ppi->size;
351 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
352 }
353
354 return NULL;
355 }
356
357 static inline
358 void rsc_add_data(struct netvsc_channel *nvchan,
359 const struct ndis_pkt_8021q_info *vlan,
360 const struct ndis_tcp_ip_checksum_info *csum_info,
361 void *data, u32 len)
362 {
363 u32 cnt = nvchan->rsc.cnt;
364
365 if (cnt) {
366 nvchan->rsc.pktlen += len;
367 } else {
368 nvchan->rsc.vlan = vlan;
369 nvchan->rsc.csum_info = csum_info;
370 nvchan->rsc.pktlen = len;
371 }
372
373 nvchan->rsc.data[cnt] = data;
374 nvchan->rsc.len[cnt] = len;
375 nvchan->rsc.cnt++;
376 }
377
378 static int rndis_filter_receive_data(struct net_device *ndev,
379 struct netvsc_device *nvdev,
380 struct netvsc_channel *nvchan,
381 struct rndis_message *msg,
382 u32 data_buflen)
383 {
384 struct rndis_packet *rndis_pkt = &msg->msg.pkt;
385 const struct ndis_tcp_ip_checksum_info *csum_info;
386 const struct ndis_pkt_8021q_info *vlan;
387 const struct rndis_pktinfo_id *pktinfo_id;
388 u32 data_offset;
389 void *data;
390 bool rsc_more = false;
391 int ret;
392
393
394 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
395
396 data_buflen -= data_offset;
397
398
399
400
401
402 if (unlikely(data_buflen < rndis_pkt->data_len)) {
403 netdev_err(ndev, "rndis message buffer "
404 "overflow detected (got %u, min %u)"
405 "...dropping this message!\n",
406 data_buflen, rndis_pkt->data_len);
407 return NVSP_STAT_FAIL;
408 }
409
410 vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO, 0);
411
412 csum_info = rndis_get_ppi(rndis_pkt, TCPIP_CHKSUM_PKTINFO, 0);
413
414 pktinfo_id = rndis_get_ppi(rndis_pkt, RNDIS_PKTINFO_ID, 1);
415
416 data = (void *)msg + data_offset;
417
418
419 if (pktinfo_id && (pktinfo_id->flag & RNDIS_PKTINFO_SUBALLOC)) {
420 if (pktinfo_id->flag & RNDIS_PKTINFO_1ST_FRAG)
421 nvchan->rsc.cnt = 0;
422 else if (nvchan->rsc.cnt == 0)
423 goto drop;
424
425 rsc_more = true;
426
427 if (pktinfo_id->flag & RNDIS_PKTINFO_LAST_FRAG)
428 rsc_more = false;
429
430 if (rsc_more && nvchan->rsc.is_last)
431 goto drop;
432 } else {
433 nvchan->rsc.cnt = 0;
434 }
435
436 if (unlikely(nvchan->rsc.cnt >= NVSP_RSC_MAX))
437 goto drop;
438
439
440
441
442
443
444 rsc_add_data(nvchan, vlan, csum_info, data, rndis_pkt->data_len);
445
446 if (rsc_more)
447 return NVSP_STAT_SUCCESS;
448
449 ret = netvsc_recv_callback(ndev, nvdev, nvchan);
450 nvchan->rsc.cnt = 0;
451
452 return ret;
453
454 drop:
455
456 nvchan->rsc.cnt = 0;
457 return NVSP_STAT_FAIL;
458 }
459
460 int rndis_filter_receive(struct net_device *ndev,
461 struct netvsc_device *net_dev,
462 struct netvsc_channel *nvchan,
463 void *data, u32 buflen)
464 {
465 struct net_device_context *net_device_ctx = netdev_priv(ndev);
466 struct rndis_message *rndis_msg = data;
467
468 if (netif_msg_rx_status(net_device_ctx))
469 dump_rndis_message(ndev, rndis_msg);
470
471 switch (rndis_msg->ndis_msg_type) {
472 case RNDIS_MSG_PACKET:
473 return rndis_filter_receive_data(ndev, net_dev, nvchan,
474 rndis_msg, buflen);
475 case RNDIS_MSG_INIT_C:
476 case RNDIS_MSG_QUERY_C:
477 case RNDIS_MSG_SET_C:
478
479 rndis_filter_receive_response(ndev, net_dev, rndis_msg);
480 break;
481
482 case RNDIS_MSG_INDICATE:
483
484 netvsc_linkstatus_callback(ndev, rndis_msg);
485 break;
486 default:
487 netdev_err(ndev,
488 "unhandled rndis message (type %u len %u)\n",
489 rndis_msg->ndis_msg_type,
490 rndis_msg->msg_len);
491 return NVSP_STAT_FAIL;
492 }
493
494 return NVSP_STAT_SUCCESS;
495 }
496
497 static int rndis_filter_query_device(struct rndis_device *dev,
498 struct netvsc_device *nvdev,
499 u32 oid, void *result, u32 *result_size)
500 {
501 struct rndis_request *request;
502 u32 inresult_size = *result_size;
503 struct rndis_query_request *query;
504 struct rndis_query_complete *query_complete;
505 int ret = 0;
506
507 if (!result)
508 return -EINVAL;
509
510 *result_size = 0;
511 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
512 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
513 if (!request) {
514 ret = -ENOMEM;
515 goto cleanup;
516 }
517
518
519 query = &request->request_msg.msg.query_req;
520 query->oid = oid;
521 query->info_buf_offset = sizeof(struct rndis_query_request);
522 query->info_buflen = 0;
523 query->dev_vc_handle = 0;
524
525 if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) {
526 struct ndis_offload *hwcaps;
527 u32 nvsp_version = nvdev->nvsp_version;
528 u8 ndis_rev;
529 size_t size;
530
531 if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) {
532 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
533 size = NDIS_OFFLOAD_SIZE;
534 } else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) {
535 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2;
536 size = NDIS_OFFLOAD_SIZE_6_1;
537 } else {
538 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1;
539 size = NDIS_OFFLOAD_SIZE_6_0;
540 }
541
542 request->request_msg.msg_len += size;
543 query->info_buflen = size;
544 hwcaps = (struct ndis_offload *)
545 ((unsigned long)query + query->info_buf_offset);
546
547 hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD;
548 hwcaps->header.revision = ndis_rev;
549 hwcaps->header.size = size;
550
551 } else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
552 struct ndis_recv_scale_cap *cap;
553
554 request->request_msg.msg_len +=
555 sizeof(struct ndis_recv_scale_cap);
556 query->info_buflen = sizeof(struct ndis_recv_scale_cap);
557 cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
558 query->info_buf_offset);
559 cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
560 cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
561 cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
562 }
563
564 ret = rndis_filter_send_request(dev, request);
565 if (ret != 0)
566 goto cleanup;
567
568 wait_for_completion(&request->wait_event);
569
570
571 query_complete = &request->response_msg.msg.query_complete;
572
573 if (query_complete->info_buflen > inresult_size) {
574 ret = -1;
575 goto cleanup;
576 }
577
578 memcpy(result,
579 (void *)((unsigned long)query_complete +
580 query_complete->info_buf_offset),
581 query_complete->info_buflen);
582
583 *result_size = query_complete->info_buflen;
584
585 cleanup:
586 if (request)
587 put_rndis_request(dev, request);
588
589 return ret;
590 }
591
592
593 static int
594 rndis_query_hwcaps(struct rndis_device *dev, struct netvsc_device *net_device,
595 struct ndis_offload *caps)
596 {
597 u32 caps_len = sizeof(*caps);
598 int ret;
599
600 memset(caps, 0, sizeof(*caps));
601
602 ret = rndis_filter_query_device(dev, net_device,
603 OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
604 caps, &caps_len);
605 if (ret)
606 return ret;
607
608 if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) {
609 netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n",
610 caps->header.type);
611 return -EINVAL;
612 }
613
614 if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) {
615 netdev_warn(dev->ndev, "invalid NDIS objrev %x\n",
616 caps->header.revision);
617 return -EINVAL;
618 }
619
620 if (caps->header.size > caps_len ||
621 caps->header.size < NDIS_OFFLOAD_SIZE_6_0) {
622 netdev_warn(dev->ndev,
623 "invalid NDIS objsize %u, data size %u\n",
624 caps->header.size, caps_len);
625 return -EINVAL;
626 }
627
628 return 0;
629 }
630
631 static int rndis_filter_query_device_mac(struct rndis_device *dev,
632 struct netvsc_device *net_device)
633 {
634 u32 size = ETH_ALEN;
635
636 return rndis_filter_query_device(dev, net_device,
637 RNDIS_OID_802_3_PERMANENT_ADDRESS,
638 dev->hw_mac_adr, &size);
639 }
640
641 #define NWADR_STR "NetworkAddress"
642 #define NWADR_STRLEN 14
643
644 int rndis_filter_set_device_mac(struct netvsc_device *nvdev,
645 const char *mac)
646 {
647 struct rndis_device *rdev = nvdev->extension;
648 struct rndis_request *request;
649 struct rndis_set_request *set;
650 struct rndis_config_parameter_info *cpi;
651 wchar_t *cfg_nwadr, *cfg_mac;
652 struct rndis_set_complete *set_complete;
653 char macstr[2*ETH_ALEN+1];
654 u32 extlen = sizeof(struct rndis_config_parameter_info) +
655 2*NWADR_STRLEN + 4*ETH_ALEN;
656 int ret;
657
658 request = get_rndis_request(rdev, RNDIS_MSG_SET,
659 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
660 if (!request)
661 return -ENOMEM;
662
663 set = &request->request_msg.msg.set_req;
664 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
665 set->info_buflen = extlen;
666 set->info_buf_offset = sizeof(struct rndis_set_request);
667 set->dev_vc_handle = 0;
668
669 cpi = (struct rndis_config_parameter_info *)((ulong)set +
670 set->info_buf_offset);
671 cpi->parameter_name_offset =
672 sizeof(struct rndis_config_parameter_info);
673
674 cpi->parameter_name_length = 2*NWADR_STRLEN;
675 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
676 cpi->parameter_value_offset =
677 cpi->parameter_name_offset + cpi->parameter_name_length;
678
679 cpi->parameter_value_length = 4*ETH_ALEN;
680
681 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
682 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
683 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
684 cfg_nwadr, NWADR_STRLEN);
685 if (ret < 0)
686 goto cleanup;
687 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
688 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
689 cfg_mac, 2*ETH_ALEN);
690 if (ret < 0)
691 goto cleanup;
692
693 ret = rndis_filter_send_request(rdev, request);
694 if (ret != 0)
695 goto cleanup;
696
697 wait_for_completion(&request->wait_event);
698
699 set_complete = &request->response_msg.msg.set_complete;
700 if (set_complete->status != RNDIS_STATUS_SUCCESS)
701 ret = -EIO;
702
703 cleanup:
704 put_rndis_request(rdev, request);
705 return ret;
706 }
707
708 int
709 rndis_filter_set_offload_params(struct net_device *ndev,
710 struct netvsc_device *nvdev,
711 struct ndis_offload_params *req_offloads)
712 {
713 struct rndis_device *rdev = nvdev->extension;
714 struct rndis_request *request;
715 struct rndis_set_request *set;
716 struct ndis_offload_params *offload_params;
717 struct rndis_set_complete *set_complete;
718 u32 extlen = sizeof(struct ndis_offload_params);
719 int ret;
720 u32 vsp_version = nvdev->nvsp_version;
721
722 if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
723 extlen = VERSION_4_OFFLOAD_SIZE;
724
725
726
727 req_offloads->udp_ip_v4_csum = 0;
728 req_offloads->udp_ip_v6_csum = 0;
729 }
730
731 request = get_rndis_request(rdev, RNDIS_MSG_SET,
732 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
733 if (!request)
734 return -ENOMEM;
735
736 set = &request->request_msg.msg.set_req;
737 set->oid = OID_TCP_OFFLOAD_PARAMETERS;
738 set->info_buflen = extlen;
739 set->info_buf_offset = sizeof(struct rndis_set_request);
740 set->dev_vc_handle = 0;
741
742 offload_params = (struct ndis_offload_params *)((ulong)set +
743 set->info_buf_offset);
744 *offload_params = *req_offloads;
745 offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
746 offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
747 offload_params->header.size = extlen;
748
749 ret = rndis_filter_send_request(rdev, request);
750 if (ret != 0)
751 goto cleanup;
752
753 wait_for_completion(&request->wait_event);
754 set_complete = &request->response_msg.msg.set_complete;
755 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
756 netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
757 set_complete->status);
758 ret = -EINVAL;
759 }
760
761 cleanup:
762 put_rndis_request(rdev, request);
763 return ret;
764 }
765
766 static int rndis_set_rss_param_msg(struct rndis_device *rdev,
767 const u8 *rss_key, u16 flag)
768 {
769 struct net_device *ndev = rdev->ndev;
770 struct net_device_context *ndc = netdev_priv(ndev);
771 struct rndis_request *request;
772 struct rndis_set_request *set;
773 struct rndis_set_complete *set_complete;
774 u32 extlen = sizeof(struct ndis_recv_scale_param) +
775 4 * ITAB_NUM + NETVSC_HASH_KEYLEN;
776 struct ndis_recv_scale_param *rssp;
777 u32 *itab;
778 u8 *keyp;
779 int i, ret;
780
781 request = get_rndis_request(
782 rdev, RNDIS_MSG_SET,
783 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
784 if (!request)
785 return -ENOMEM;
786
787 set = &request->request_msg.msg.set_req;
788 set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
789 set->info_buflen = extlen;
790 set->info_buf_offset = sizeof(struct rndis_set_request);
791 set->dev_vc_handle = 0;
792
793 rssp = (struct ndis_recv_scale_param *)(set + 1);
794 rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
795 rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
796 rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
797 rssp->flag = flag;
798 rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
799 NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
800 NDIS_HASH_TCP_IPV6;
801 rssp->indirect_tabsize = 4*ITAB_NUM;
802 rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
803 rssp->hashkey_size = NETVSC_HASH_KEYLEN;
804 rssp->hashkey_offset = rssp->indirect_taboffset +
805 rssp->indirect_tabsize;
806
807
808 itab = (u32 *)(rssp + 1);
809 for (i = 0; i < ITAB_NUM; i++)
810 itab[i] = ndc->rx_table[i];
811
812
813 keyp = (u8 *)((unsigned long)rssp + rssp->hashkey_offset);
814 memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
815
816 ret = rndis_filter_send_request(rdev, request);
817 if (ret != 0)
818 goto cleanup;
819
820 wait_for_completion(&request->wait_event);
821 set_complete = &request->response_msg.msg.set_complete;
822 if (set_complete->status == RNDIS_STATUS_SUCCESS) {
823 if (!(flag & NDIS_RSS_PARAM_FLAG_DISABLE_RSS) &&
824 !(flag & NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED))
825 memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
826
827 } else {
828 netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
829 set_complete->status);
830 ret = -EINVAL;
831 }
832
833 cleanup:
834 put_rndis_request(rdev, request);
835 return ret;
836 }
837
838 int rndis_filter_set_rss_param(struct rndis_device *rdev,
839 const u8 *rss_key)
840 {
841
842 rndis_set_rss_param_msg(rdev, rss_key,
843 NDIS_RSS_PARAM_FLAG_DISABLE_RSS);
844
845 return rndis_set_rss_param_msg(rdev, rss_key, 0);
846 }
847
848 static int rndis_filter_query_device_link_status(struct rndis_device *dev,
849 struct netvsc_device *net_device)
850 {
851 u32 size = sizeof(u32);
852 u32 link_status;
853
854 return rndis_filter_query_device(dev, net_device,
855 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
856 &link_status, &size);
857 }
858
859 static int rndis_filter_query_link_speed(struct rndis_device *dev,
860 struct netvsc_device *net_device)
861 {
862 u32 size = sizeof(u32);
863 u32 link_speed;
864 struct net_device_context *ndc;
865 int ret;
866
867 ret = rndis_filter_query_device(dev, net_device,
868 RNDIS_OID_GEN_LINK_SPEED,
869 &link_speed, &size);
870
871 if (!ret) {
872 ndc = netdev_priv(dev->ndev);
873
874
875
876
877 ndc->speed = link_speed / 10000;
878 }
879
880 return ret;
881 }
882
883 static int rndis_filter_set_packet_filter(struct rndis_device *dev,
884 u32 new_filter)
885 {
886 struct rndis_request *request;
887 struct rndis_set_request *set;
888 int ret;
889
890 if (dev->filter == new_filter)
891 return 0;
892
893 request = get_rndis_request(dev, RNDIS_MSG_SET,
894 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
895 sizeof(u32));
896 if (!request)
897 return -ENOMEM;
898
899
900 set = &request->request_msg.msg.set_req;
901 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
902 set->info_buflen = sizeof(u32);
903 set->info_buf_offset = sizeof(struct rndis_set_request);
904
905 memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
906 &new_filter, sizeof(u32));
907
908 ret = rndis_filter_send_request(dev, request);
909 if (ret == 0) {
910 wait_for_completion(&request->wait_event);
911 dev->filter = new_filter;
912 }
913
914 put_rndis_request(dev, request);
915
916 return ret;
917 }
918
919 static void rndis_set_multicast(struct work_struct *w)
920 {
921 struct rndis_device *rdev
922 = container_of(w, struct rndis_device, mcast_work);
923 u32 filter = NDIS_PACKET_TYPE_DIRECTED;
924 unsigned int flags = rdev->ndev->flags;
925
926 if (flags & IFF_PROMISC) {
927 filter = NDIS_PACKET_TYPE_PROMISCUOUS;
928 } else {
929 if (!netdev_mc_empty(rdev->ndev) || (flags & IFF_ALLMULTI))
930 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
931 if (flags & IFF_BROADCAST)
932 filter |= NDIS_PACKET_TYPE_BROADCAST;
933 }
934
935 rndis_filter_set_packet_filter(rdev, filter);
936 }
937
938 void rndis_filter_update(struct netvsc_device *nvdev)
939 {
940 struct rndis_device *rdev = nvdev->extension;
941
942 schedule_work(&rdev->mcast_work);
943 }
944
945 static int rndis_filter_init_device(struct rndis_device *dev,
946 struct netvsc_device *nvdev)
947 {
948 struct rndis_request *request;
949 struct rndis_initialize_request *init;
950 struct rndis_initialize_complete *init_complete;
951 u32 status;
952 int ret;
953
954 request = get_rndis_request(dev, RNDIS_MSG_INIT,
955 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
956 if (!request) {
957 ret = -ENOMEM;
958 goto cleanup;
959 }
960
961
962 init = &request->request_msg.msg.init_req;
963 init->major_ver = RNDIS_MAJOR_VERSION;
964 init->minor_ver = RNDIS_MINOR_VERSION;
965 init->max_xfer_size = 0x4000;
966
967 dev->state = RNDIS_DEV_INITIALIZING;
968
969 ret = rndis_filter_send_request(dev, request);
970 if (ret != 0) {
971 dev->state = RNDIS_DEV_UNINITIALIZED;
972 goto cleanup;
973 }
974
975 wait_for_completion(&request->wait_event);
976
977 init_complete = &request->response_msg.msg.init_complete;
978 status = init_complete->status;
979 if (status == RNDIS_STATUS_SUCCESS) {
980 dev->state = RNDIS_DEV_INITIALIZED;
981 nvdev->max_pkt = init_complete->max_pkt_per_msg;
982 nvdev->pkt_align = 1 << init_complete->pkt_alignment_factor;
983 ret = 0;
984 } else {
985 dev->state = RNDIS_DEV_UNINITIALIZED;
986 ret = -EINVAL;
987 }
988
989 cleanup:
990 if (request)
991 put_rndis_request(dev, request);
992
993 return ret;
994 }
995
996 static bool netvsc_device_idle(const struct netvsc_device *nvdev)
997 {
998 int i;
999
1000 for (i = 0; i < nvdev->num_chn; i++) {
1001 const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
1002
1003 if (nvchan->mrc.first != nvchan->mrc.next)
1004 return false;
1005
1006 if (atomic_read(&nvchan->queue_sends) > 0)
1007 return false;
1008 }
1009
1010 return true;
1011 }
1012
1013 static void rndis_filter_halt_device(struct netvsc_device *nvdev,
1014 struct rndis_device *dev)
1015 {
1016 struct rndis_request *request;
1017 struct rndis_halt_request *halt;
1018
1019
1020 request = get_rndis_request(dev, RNDIS_MSG_HALT,
1021 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
1022 if (!request)
1023 goto cleanup;
1024
1025
1026 halt = &request->request_msg.msg.halt_req;
1027 halt->req_id = atomic_inc_return(&dev->new_req_id);
1028
1029
1030 rndis_filter_send_request(dev, request);
1031
1032 dev->state = RNDIS_DEV_UNINITIALIZED;
1033
1034 cleanup:
1035 nvdev->destroy = true;
1036
1037
1038 wmb();
1039
1040
1041 wait_event(nvdev->wait_drain, netvsc_device_idle(nvdev));
1042
1043 if (request)
1044 put_rndis_request(dev, request);
1045 }
1046
1047 static int rndis_filter_open_device(struct rndis_device *dev)
1048 {
1049 int ret;
1050
1051 if (dev->state != RNDIS_DEV_INITIALIZED)
1052 return 0;
1053
1054 ret = rndis_filter_set_packet_filter(dev,
1055 NDIS_PACKET_TYPE_BROADCAST |
1056 NDIS_PACKET_TYPE_ALL_MULTICAST |
1057 NDIS_PACKET_TYPE_DIRECTED);
1058 if (ret == 0)
1059 dev->state = RNDIS_DEV_DATAINITIALIZED;
1060
1061 return ret;
1062 }
1063
1064 static int rndis_filter_close_device(struct rndis_device *dev)
1065 {
1066 int ret;
1067
1068 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
1069 return 0;
1070
1071
1072 cancel_work_sync(&dev->mcast_work);
1073
1074 ret = rndis_filter_set_packet_filter(dev, 0);
1075 if (ret == -ENODEV)
1076 ret = 0;
1077
1078 if (ret == 0)
1079 dev->state = RNDIS_DEV_INITIALIZED;
1080
1081 return ret;
1082 }
1083
1084 static void netvsc_sc_open(struct vmbus_channel *new_sc)
1085 {
1086 struct net_device *ndev =
1087 hv_get_drvdata(new_sc->primary_channel->device_obj);
1088 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1089 struct netvsc_device *nvscdev;
1090 u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
1091 struct netvsc_channel *nvchan;
1092 int ret;
1093
1094
1095
1096
1097 nvscdev = rcu_dereference_raw(ndev_ctx->nvdev);
1098 if (!nvscdev || chn_index >= nvscdev->num_chn)
1099 return;
1100
1101 nvchan = nvscdev->chan_table + chn_index;
1102
1103
1104
1105
1106 set_channel_read_mode(new_sc, HV_CALL_ISR);
1107
1108
1109 nvchan->channel = new_sc;
1110
1111 ret = vmbus_open(new_sc, netvsc_ring_bytes,
1112 netvsc_ring_bytes, NULL, 0,
1113 netvsc_channel_cb, nvchan);
1114 if (ret == 0)
1115 napi_enable(&nvchan->napi);
1116 else
1117 netdev_notice(ndev, "sub channel open failed: %d\n", ret);
1118
1119 if (atomic_inc_return(&nvscdev->open_chn) == nvscdev->num_chn)
1120 wake_up(&nvscdev->subchan_open);
1121 }
1122
1123
1124
1125
1126
1127 int rndis_set_subchannel(struct net_device *ndev,
1128 struct netvsc_device *nvdev,
1129 struct netvsc_device_info *dev_info)
1130 {
1131 struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
1132 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1133 struct hv_device *hv_dev = ndev_ctx->device_ctx;
1134 struct rndis_device *rdev = nvdev->extension;
1135 int i, ret;
1136
1137 ASSERT_RTNL();
1138
1139 memset(init_packet, 0, sizeof(struct nvsp_message));
1140 init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
1141 init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
1142 init_packet->msg.v5_msg.subchn_req.num_subchannels =
1143 nvdev->num_chn - 1;
1144 trace_nvsp_send(ndev, init_packet);
1145
1146 ret = vmbus_sendpacket(hv_dev->channel, init_packet,
1147 sizeof(struct nvsp_message),
1148 (unsigned long)init_packet,
1149 VM_PKT_DATA_INBAND,
1150 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
1151 if (ret) {
1152 netdev_err(ndev, "sub channel allocate send failed: %d\n", ret);
1153 return ret;
1154 }
1155
1156 wait_for_completion(&nvdev->channel_init_wait);
1157 if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
1158 netdev_err(ndev, "sub channel request failed\n");
1159 return -EIO;
1160 }
1161
1162 nvdev->num_chn = 1 +
1163 init_packet->msg.v5_msg.subchn_comp.num_subchannels;
1164
1165
1166 wait_event(nvdev->subchan_open,
1167 atomic_read(&nvdev->open_chn) == nvdev->num_chn);
1168
1169 for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
1170 ndev_ctx->tx_table[i] = i % nvdev->num_chn;
1171
1172
1173 if (dev_info)
1174 rndis_filter_set_rss_param(rdev, dev_info->rss_key);
1175 else
1176 rndis_filter_set_rss_param(rdev, netvsc_hash_key);
1177
1178 netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
1179 netif_set_real_num_rx_queues(ndev, nvdev->num_chn);
1180
1181 return 0;
1182 }
1183
1184 static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
1185 struct netvsc_device *nvdev)
1186 {
1187 struct net_device *net = rndis_device->ndev;
1188 struct net_device_context *net_device_ctx = netdev_priv(net);
1189 struct ndis_offload hwcaps;
1190 struct ndis_offload_params offloads;
1191 unsigned int gso_max_size = GSO_MAX_SIZE;
1192 int ret;
1193
1194
1195 ret = rndis_query_hwcaps(rndis_device, nvdev, &hwcaps);
1196 if (ret != 0)
1197 return ret;
1198
1199
1200 memset(&offloads, 0, sizeof(struct ndis_offload_params));
1201
1202
1203 offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED;
1204
1205
1206 net->hw_features &= ~NETVSC_SUPPORTED_HW_FEATURES;
1207 net_device_ctx->tx_checksum_mask = 0;
1208
1209
1210 net->hw_features |= NETIF_F_RXCSUM;
1211 net->hw_features |= NETIF_F_SG;
1212
1213 if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
1214
1215 net->hw_features |= NETIF_F_IP_CSUM;
1216 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP;
1217
1218 offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1219
1220 if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) {
1221 offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1222 net->hw_features |= NETIF_F_TSO;
1223
1224 if (hwcaps.lsov2.ip4_maxsz < gso_max_size)
1225 gso_max_size = hwcaps.lsov2.ip4_maxsz;
1226 }
1227
1228 if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) {
1229 offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1230 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP;
1231 }
1232 }
1233
1234 if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) {
1235 net->hw_features |= NETIF_F_IPV6_CSUM;
1236
1237 offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1238 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP;
1239
1240 if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) &&
1241 (hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) {
1242 offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1243 net->hw_features |= NETIF_F_TSO6;
1244
1245 if (hwcaps.lsov2.ip6_maxsz < gso_max_size)
1246 gso_max_size = hwcaps.lsov2.ip6_maxsz;
1247 }
1248
1249 if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) {
1250 offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1251 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP;
1252 }
1253 }
1254
1255 if (hwcaps.rsc.ip4 && hwcaps.rsc.ip6) {
1256 net->hw_features |= NETIF_F_LRO;
1257
1258 if (net->features & NETIF_F_LRO) {
1259 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1260 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1261 } else {
1262 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1263 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1264 }
1265 }
1266
1267
1268
1269
1270 net->features &= ~NETVSC_SUPPORTED_HW_FEATURES | net->hw_features;
1271
1272 netif_set_gso_max_size(net, gso_max_size);
1273
1274 ret = rndis_filter_set_offload_params(net, nvdev, &offloads);
1275
1276 return ret;
1277 }
1278
1279 static void rndis_get_friendly_name(struct net_device *net,
1280 struct rndis_device *rndis_device,
1281 struct netvsc_device *net_device)
1282 {
1283 ucs2_char_t wname[256];
1284 unsigned long len;
1285 u8 ifalias[256];
1286 u32 size;
1287
1288 size = sizeof(wname);
1289 if (rndis_filter_query_device(rndis_device, net_device,
1290 RNDIS_OID_GEN_FRIENDLY_NAME,
1291 wname, &size) != 0)
1292 return;
1293
1294 if (size == 0)
1295 return;
1296
1297
1298 len = ucs2_as_utf8(ifalias, wname, sizeof(ifalias));
1299
1300
1301 if (strcmp(ifalias, "Network Adapter") != 0)
1302 dev_set_alias(net, ifalias, len);
1303 }
1304
1305 struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
1306 struct netvsc_device_info *device_info)
1307 {
1308 struct net_device *net = hv_get_drvdata(dev);
1309 struct net_device_context *ndc = netdev_priv(net);
1310 struct netvsc_device *net_device;
1311 struct rndis_device *rndis_device;
1312 struct ndis_recv_scale_cap rsscap;
1313 u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
1314 u32 mtu, size;
1315 u32 num_possible_rss_qs;
1316 int i, ret;
1317
1318 rndis_device = get_rndis_device();
1319 if (!rndis_device)
1320 return ERR_PTR(-ENODEV);
1321
1322
1323
1324
1325
1326 net_device = netvsc_device_add(dev, device_info);
1327 if (IS_ERR(net_device)) {
1328 kfree(rndis_device);
1329 return net_device;
1330 }
1331
1332
1333 net_device->max_chn = 1;
1334 net_device->num_chn = 1;
1335
1336 net_device->extension = rndis_device;
1337 rndis_device->ndev = net;
1338
1339
1340 ret = rndis_filter_init_device(rndis_device, net_device);
1341 if (ret != 0)
1342 goto err_dev_remv;
1343
1344
1345 size = sizeof(u32);
1346 ret = rndis_filter_query_device(rndis_device, net_device,
1347 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
1348 &mtu, &size);
1349 if (ret == 0 && size == sizeof(u32) && mtu < net->mtu)
1350 net->mtu = mtu;
1351
1352
1353 ret = rndis_filter_query_device_mac(rndis_device, net_device);
1354 if (ret != 0)
1355 goto err_dev_remv;
1356
1357 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
1358
1359
1360 if (!net->ifalias)
1361 rndis_get_friendly_name(net, rndis_device, net_device);
1362
1363
1364 ret = rndis_netdev_set_hwcaps(rndis_device, net_device);
1365 if (ret != 0)
1366 goto err_dev_remv;
1367
1368 rndis_filter_query_device_link_status(rndis_device, net_device);
1369
1370 netdev_dbg(net, "Device MAC %pM link state %s\n",
1371 rndis_device->hw_mac_adr,
1372 rndis_device->link_state ? "down" : "up");
1373
1374 if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
1375 goto out;
1376
1377 rndis_filter_query_link_speed(rndis_device, net_device);
1378
1379
1380 memset(&rsscap, 0, rsscap_size);
1381 ret = rndis_filter_query_device(rndis_device, net_device,
1382 OID_GEN_RECEIVE_SCALE_CAPABILITIES,
1383 &rsscap, &rsscap_size);
1384 if (ret || rsscap.num_recv_que < 2)
1385 goto out;
1386
1387
1388 num_possible_rss_qs = min_t(u32, num_online_cpus(),
1389 rsscap.num_recv_que);
1390
1391 net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, num_possible_rss_qs);
1392
1393
1394 net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
1395
1396 if (!netif_is_rxfh_configured(net)) {
1397 for (i = 0; i < ITAB_NUM; i++)
1398 ndc->rx_table[i] = ethtool_rxfh_indir_default(
1399 i, net_device->num_chn);
1400 }
1401
1402 atomic_set(&net_device->open_chn, 1);
1403 vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
1404
1405 for (i = 1; i < net_device->num_chn; i++) {
1406 ret = netvsc_alloc_recv_comp_ring(net_device, i);
1407 if (ret) {
1408 while (--i != 0)
1409 vfree(net_device->chan_table[i].mrc.slots);
1410 goto out;
1411 }
1412 }
1413
1414 for (i = 1; i < net_device->num_chn; i++)
1415 netif_napi_add(net, &net_device->chan_table[i].napi,
1416 netvsc_poll, NAPI_POLL_WEIGHT);
1417
1418 return net_device;
1419
1420 out:
1421
1422 net_device->max_chn = 1;
1423 net_device->num_chn = 1;
1424 return net_device;
1425
1426 err_dev_remv:
1427 rndis_filter_device_remove(dev, net_device);
1428 return ERR_PTR(ret);
1429 }
1430
1431 void rndis_filter_device_remove(struct hv_device *dev,
1432 struct netvsc_device *net_dev)
1433 {
1434 struct rndis_device *rndis_dev = net_dev->extension;
1435
1436
1437 rndis_filter_halt_device(net_dev, rndis_dev);
1438
1439 netvsc_device_remove(dev);
1440 }
1441
1442 int rndis_filter_open(struct netvsc_device *nvdev)
1443 {
1444 if (!nvdev)
1445 return -EINVAL;
1446
1447 return rndis_filter_open_device(nvdev->extension);
1448 }
1449
1450 int rndis_filter_close(struct netvsc_device *nvdev)
1451 {
1452 if (!nvdev)
1453 return -EINVAL;
1454
1455 return rndis_filter_close_device(nvdev->extension);
1456 }