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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
26static void rndis_set_multicast(struct work_struct *w);
27
28#define RNDIS_EXT_LEN PAGE_SIZE
29struct 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
53static 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
61static 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
79static 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
116static 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
128static 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
203static 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, false);
239 rcu_read_unlock_bh();
240
241 return ret;
242}
243
244static 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
260static 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
334static 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
357static inline
358void 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 const u32 *hash_info,
362 void *data, u32 len)
363{
364 u32 cnt = nvchan->rsc.cnt;
365
366 if (cnt) {
367 nvchan->rsc.pktlen += len;
368 } else {
369 nvchan->rsc.vlan = vlan;
370 nvchan->rsc.csum_info = csum_info;
371 nvchan->rsc.pktlen = len;
372 nvchan->rsc.hash_info = hash_info;
373 }
374
375 nvchan->rsc.data[cnt] = data;
376 nvchan->rsc.len[cnt] = len;
377 nvchan->rsc.cnt++;
378}
379
380static int rndis_filter_receive_data(struct net_device *ndev,
381 struct netvsc_device *nvdev,
382 struct netvsc_channel *nvchan,
383 struct rndis_message *msg,
384 u32 data_buflen)
385{
386 struct rndis_packet *rndis_pkt = &msg->msg.pkt;
387 const struct ndis_tcp_ip_checksum_info *csum_info;
388 const struct ndis_pkt_8021q_info *vlan;
389 const struct rndis_pktinfo_id *pktinfo_id;
390 const u32 *hash_info;
391 u32 data_offset;
392 void *data;
393 bool rsc_more = false;
394 int ret;
395
396
397 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
398
399 data_buflen -= data_offset;
400
401
402
403
404
405 if (unlikely(data_buflen < rndis_pkt->data_len)) {
406 netdev_err(ndev, "rndis message buffer "
407 "overflow detected (got %u, min %u)"
408 "...dropping this message!\n",
409 data_buflen, rndis_pkt->data_len);
410 return NVSP_STAT_FAIL;
411 }
412
413 vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO, 0);
414
415 csum_info = rndis_get_ppi(rndis_pkt, TCPIP_CHKSUM_PKTINFO, 0);
416
417 hash_info = rndis_get_ppi(rndis_pkt, NBL_HASH_VALUE, 0);
418
419 pktinfo_id = rndis_get_ppi(rndis_pkt, RNDIS_PKTINFO_ID, 1);
420
421 data = (void *)msg + data_offset;
422
423
424 if (pktinfo_id && (pktinfo_id->flag & RNDIS_PKTINFO_SUBALLOC)) {
425 if (pktinfo_id->flag & RNDIS_PKTINFO_1ST_FRAG)
426 nvchan->rsc.cnt = 0;
427 else if (nvchan->rsc.cnt == 0)
428 goto drop;
429
430 rsc_more = true;
431
432 if (pktinfo_id->flag & RNDIS_PKTINFO_LAST_FRAG)
433 rsc_more = false;
434
435 if (rsc_more && nvchan->rsc.is_last)
436 goto drop;
437 } else {
438 nvchan->rsc.cnt = 0;
439 }
440
441 if (unlikely(nvchan->rsc.cnt >= NVSP_RSC_MAX))
442 goto drop;
443
444
445
446
447
448
449 rsc_add_data(nvchan, vlan, csum_info, hash_info,
450 data, rndis_pkt->data_len);
451
452 if (rsc_more)
453 return NVSP_STAT_SUCCESS;
454
455 ret = netvsc_recv_callback(ndev, nvdev, nvchan);
456 nvchan->rsc.cnt = 0;
457
458 return ret;
459
460drop:
461
462 nvchan->rsc.cnt = 0;
463 return NVSP_STAT_FAIL;
464}
465
466int rndis_filter_receive(struct net_device *ndev,
467 struct netvsc_device *net_dev,
468 struct netvsc_channel *nvchan,
469 void *data, u32 buflen)
470{
471 struct net_device_context *net_device_ctx = netdev_priv(ndev);
472 struct rndis_message *rndis_msg = data;
473
474 if (netif_msg_rx_status(net_device_ctx))
475 dump_rndis_message(ndev, rndis_msg);
476
477 switch (rndis_msg->ndis_msg_type) {
478 case RNDIS_MSG_PACKET:
479 return rndis_filter_receive_data(ndev, net_dev, nvchan,
480 rndis_msg, buflen);
481 case RNDIS_MSG_INIT_C:
482 case RNDIS_MSG_QUERY_C:
483 case RNDIS_MSG_SET_C:
484
485 rndis_filter_receive_response(ndev, net_dev, rndis_msg);
486 break;
487
488 case RNDIS_MSG_INDICATE:
489
490 netvsc_linkstatus_callback(ndev, rndis_msg);
491 break;
492 default:
493 netdev_err(ndev,
494 "unhandled rndis message (type %u len %u)\n",
495 rndis_msg->ndis_msg_type,
496 rndis_msg->msg_len);
497 return NVSP_STAT_FAIL;
498 }
499
500 return NVSP_STAT_SUCCESS;
501}
502
503static int rndis_filter_query_device(struct rndis_device *dev,
504 struct netvsc_device *nvdev,
505 u32 oid, void *result, u32 *result_size)
506{
507 struct rndis_request *request;
508 u32 inresult_size = *result_size;
509 struct rndis_query_request *query;
510 struct rndis_query_complete *query_complete;
511 int ret = 0;
512
513 if (!result)
514 return -EINVAL;
515
516 *result_size = 0;
517 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
518 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
519 if (!request) {
520 ret = -ENOMEM;
521 goto cleanup;
522 }
523
524
525 query = &request->request_msg.msg.query_req;
526 query->oid = oid;
527 query->info_buf_offset = sizeof(struct rndis_query_request);
528 query->info_buflen = 0;
529 query->dev_vc_handle = 0;
530
531 if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) {
532 struct ndis_offload *hwcaps;
533 u32 nvsp_version = nvdev->nvsp_version;
534 u8 ndis_rev;
535 size_t size;
536
537 if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) {
538 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
539 size = NDIS_OFFLOAD_SIZE;
540 } else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) {
541 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2;
542 size = NDIS_OFFLOAD_SIZE_6_1;
543 } else {
544 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1;
545 size = NDIS_OFFLOAD_SIZE_6_0;
546 }
547
548 request->request_msg.msg_len += size;
549 query->info_buflen = size;
550 hwcaps = (struct ndis_offload *)
551 ((unsigned long)query + query->info_buf_offset);
552
553 hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD;
554 hwcaps->header.revision = ndis_rev;
555 hwcaps->header.size = size;
556
557 } else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
558 struct ndis_recv_scale_cap *cap;
559
560 request->request_msg.msg_len +=
561 sizeof(struct ndis_recv_scale_cap);
562 query->info_buflen = sizeof(struct ndis_recv_scale_cap);
563 cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
564 query->info_buf_offset);
565 cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
566 cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
567 cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
568 }
569
570 ret = rndis_filter_send_request(dev, request);
571 if (ret != 0)
572 goto cleanup;
573
574 wait_for_completion(&request->wait_event);
575
576
577 query_complete = &request->response_msg.msg.query_complete;
578
579 if (query_complete->info_buflen > inresult_size) {
580 ret = -1;
581 goto cleanup;
582 }
583
584 memcpy(result,
585 (void *)((unsigned long)query_complete +
586 query_complete->info_buf_offset),
587 query_complete->info_buflen);
588
589 *result_size = query_complete->info_buflen;
590
591cleanup:
592 if (request)
593 put_rndis_request(dev, request);
594
595 return ret;
596}
597
598
599static int
600rndis_query_hwcaps(struct rndis_device *dev, struct netvsc_device *net_device,
601 struct ndis_offload *caps)
602{
603 u32 caps_len = sizeof(*caps);
604 int ret;
605
606 memset(caps, 0, sizeof(*caps));
607
608 ret = rndis_filter_query_device(dev, net_device,
609 OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
610 caps, &caps_len);
611 if (ret)
612 return ret;
613
614 if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) {
615 netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n",
616 caps->header.type);
617 return -EINVAL;
618 }
619
620 if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) {
621 netdev_warn(dev->ndev, "invalid NDIS objrev %x\n",
622 caps->header.revision);
623 return -EINVAL;
624 }
625
626 if (caps->header.size > caps_len ||
627 caps->header.size < NDIS_OFFLOAD_SIZE_6_0) {
628 netdev_warn(dev->ndev,
629 "invalid NDIS objsize %u, data size %u\n",
630 caps->header.size, caps_len);
631 return -EINVAL;
632 }
633
634 return 0;
635}
636
637static int rndis_filter_query_device_mac(struct rndis_device *dev,
638 struct netvsc_device *net_device)
639{
640 u32 size = ETH_ALEN;
641
642 return rndis_filter_query_device(dev, net_device,
643 RNDIS_OID_802_3_PERMANENT_ADDRESS,
644 dev->hw_mac_adr, &size);
645}
646
647#define NWADR_STR "NetworkAddress"
648#define NWADR_STRLEN 14
649
650int rndis_filter_set_device_mac(struct netvsc_device *nvdev,
651 const char *mac)
652{
653 struct rndis_device *rdev = nvdev->extension;
654 struct rndis_request *request;
655 struct rndis_set_request *set;
656 struct rndis_config_parameter_info *cpi;
657 wchar_t *cfg_nwadr, *cfg_mac;
658 struct rndis_set_complete *set_complete;
659 char macstr[2*ETH_ALEN+1];
660 u32 extlen = sizeof(struct rndis_config_parameter_info) +
661 2*NWADR_STRLEN + 4*ETH_ALEN;
662 int ret;
663
664 request = get_rndis_request(rdev, RNDIS_MSG_SET,
665 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
666 if (!request)
667 return -ENOMEM;
668
669 set = &request->request_msg.msg.set_req;
670 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
671 set->info_buflen = extlen;
672 set->info_buf_offset = sizeof(struct rndis_set_request);
673 set->dev_vc_handle = 0;
674
675 cpi = (struct rndis_config_parameter_info *)((ulong)set +
676 set->info_buf_offset);
677 cpi->parameter_name_offset =
678 sizeof(struct rndis_config_parameter_info);
679
680 cpi->parameter_name_length = 2*NWADR_STRLEN;
681 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
682 cpi->parameter_value_offset =
683 cpi->parameter_name_offset + cpi->parameter_name_length;
684
685 cpi->parameter_value_length = 4*ETH_ALEN;
686
687 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
688 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
689 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
690 cfg_nwadr, NWADR_STRLEN);
691 if (ret < 0)
692 goto cleanup;
693 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
694 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
695 cfg_mac, 2*ETH_ALEN);
696 if (ret < 0)
697 goto cleanup;
698
699 ret = rndis_filter_send_request(rdev, request);
700 if (ret != 0)
701 goto cleanup;
702
703 wait_for_completion(&request->wait_event);
704
705 set_complete = &request->response_msg.msg.set_complete;
706 if (set_complete->status != RNDIS_STATUS_SUCCESS)
707 ret = -EIO;
708
709cleanup:
710 put_rndis_request(rdev, request);
711 return ret;
712}
713
714int
715rndis_filter_set_offload_params(struct net_device *ndev,
716 struct netvsc_device *nvdev,
717 struct ndis_offload_params *req_offloads)
718{
719 struct rndis_device *rdev = nvdev->extension;
720 struct rndis_request *request;
721 struct rndis_set_request *set;
722 struct ndis_offload_params *offload_params;
723 struct rndis_set_complete *set_complete;
724 u32 extlen = sizeof(struct ndis_offload_params);
725 int ret;
726 u32 vsp_version = nvdev->nvsp_version;
727
728 if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
729 extlen = VERSION_4_OFFLOAD_SIZE;
730
731
732
733 req_offloads->udp_ip_v4_csum = 0;
734 req_offloads->udp_ip_v6_csum = 0;
735 }
736
737 request = get_rndis_request(rdev, RNDIS_MSG_SET,
738 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
739 if (!request)
740 return -ENOMEM;
741
742 set = &request->request_msg.msg.set_req;
743 set->oid = OID_TCP_OFFLOAD_PARAMETERS;
744 set->info_buflen = extlen;
745 set->info_buf_offset = sizeof(struct rndis_set_request);
746 set->dev_vc_handle = 0;
747
748 offload_params = (struct ndis_offload_params *)((ulong)set +
749 set->info_buf_offset);
750 *offload_params = *req_offloads;
751 offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
752 offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
753 offload_params->header.size = extlen;
754
755 ret = rndis_filter_send_request(rdev, request);
756 if (ret != 0)
757 goto cleanup;
758
759 wait_for_completion(&request->wait_event);
760 set_complete = &request->response_msg.msg.set_complete;
761 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
762 netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
763 set_complete->status);
764 ret = -EINVAL;
765 }
766
767cleanup:
768 put_rndis_request(rdev, request);
769 return ret;
770}
771
772static int rndis_set_rss_param_msg(struct rndis_device *rdev,
773 const u8 *rss_key, u16 flag)
774{
775 struct net_device *ndev = rdev->ndev;
776 struct net_device_context *ndc = netdev_priv(ndev);
777 struct rndis_request *request;
778 struct rndis_set_request *set;
779 struct rndis_set_complete *set_complete;
780 u32 extlen = sizeof(struct ndis_recv_scale_param) +
781 4 * ITAB_NUM + NETVSC_HASH_KEYLEN;
782 struct ndis_recv_scale_param *rssp;
783 u32 *itab;
784 u8 *keyp;
785 int i, ret;
786
787 request = get_rndis_request(
788 rdev, RNDIS_MSG_SET,
789 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
790 if (!request)
791 return -ENOMEM;
792
793 set = &request->request_msg.msg.set_req;
794 set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
795 set->info_buflen = extlen;
796 set->info_buf_offset = sizeof(struct rndis_set_request);
797 set->dev_vc_handle = 0;
798
799 rssp = (struct ndis_recv_scale_param *)(set + 1);
800 rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
801 rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
802 rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
803 rssp->flag = flag;
804 rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
805 NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
806 NDIS_HASH_TCP_IPV6;
807 rssp->indirect_tabsize = 4*ITAB_NUM;
808 rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
809 rssp->hashkey_size = NETVSC_HASH_KEYLEN;
810 rssp->hashkey_offset = rssp->indirect_taboffset +
811 rssp->indirect_tabsize;
812
813
814 itab = (u32 *)(rssp + 1);
815 for (i = 0; i < ITAB_NUM; i++)
816 itab[i] = ndc->rx_table[i];
817
818
819 keyp = (u8 *)((unsigned long)rssp + rssp->hashkey_offset);
820 memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
821
822 ret = rndis_filter_send_request(rdev, request);
823 if (ret != 0)
824 goto cleanup;
825
826 wait_for_completion(&request->wait_event);
827 set_complete = &request->response_msg.msg.set_complete;
828 if (set_complete->status == RNDIS_STATUS_SUCCESS) {
829 if (!(flag & NDIS_RSS_PARAM_FLAG_DISABLE_RSS) &&
830 !(flag & NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED))
831 memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
832
833 } else {
834 netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
835 set_complete->status);
836 ret = -EINVAL;
837 }
838
839cleanup:
840 put_rndis_request(rdev, request);
841 return ret;
842}
843
844int rndis_filter_set_rss_param(struct rndis_device *rdev,
845 const u8 *rss_key)
846{
847
848 rndis_set_rss_param_msg(rdev, rss_key,
849 NDIS_RSS_PARAM_FLAG_DISABLE_RSS);
850
851 return rndis_set_rss_param_msg(rdev, rss_key, 0);
852}
853
854static int rndis_filter_query_device_link_status(struct rndis_device *dev,
855 struct netvsc_device *net_device)
856{
857 u32 size = sizeof(u32);
858 u32 link_status;
859
860 return rndis_filter_query_device(dev, net_device,
861 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
862 &link_status, &size);
863}
864
865static int rndis_filter_query_link_speed(struct rndis_device *dev,
866 struct netvsc_device *net_device)
867{
868 u32 size = sizeof(u32);
869 u32 link_speed;
870 struct net_device_context *ndc;
871 int ret;
872
873 ret = rndis_filter_query_device(dev, net_device,
874 RNDIS_OID_GEN_LINK_SPEED,
875 &link_speed, &size);
876
877 if (!ret) {
878 ndc = netdev_priv(dev->ndev);
879
880
881
882
883 ndc->speed = link_speed / 10000;
884 }
885
886 return ret;
887}
888
889static int rndis_filter_set_packet_filter(struct rndis_device *dev,
890 u32 new_filter)
891{
892 struct rndis_request *request;
893 struct rndis_set_request *set;
894 int ret;
895
896 if (dev->filter == new_filter)
897 return 0;
898
899 request = get_rndis_request(dev, RNDIS_MSG_SET,
900 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
901 sizeof(u32));
902 if (!request)
903 return -ENOMEM;
904
905
906 set = &request->request_msg.msg.set_req;
907 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
908 set->info_buflen = sizeof(u32);
909 set->info_buf_offset = sizeof(struct rndis_set_request);
910
911 memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
912 &new_filter, sizeof(u32));
913
914 ret = rndis_filter_send_request(dev, request);
915 if (ret == 0) {
916 wait_for_completion(&request->wait_event);
917 dev->filter = new_filter;
918 }
919
920 put_rndis_request(dev, request);
921
922 return ret;
923}
924
925static void rndis_set_multicast(struct work_struct *w)
926{
927 struct rndis_device *rdev
928 = container_of(w, struct rndis_device, mcast_work);
929 u32 filter = NDIS_PACKET_TYPE_DIRECTED;
930 unsigned int flags = rdev->ndev->flags;
931
932 if (flags & IFF_PROMISC) {
933 filter = NDIS_PACKET_TYPE_PROMISCUOUS;
934 } else {
935 if (!netdev_mc_empty(rdev->ndev) || (flags & IFF_ALLMULTI))
936 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
937 if (flags & IFF_BROADCAST)
938 filter |= NDIS_PACKET_TYPE_BROADCAST;
939 }
940
941 rndis_filter_set_packet_filter(rdev, filter);
942}
943
944void rndis_filter_update(struct netvsc_device *nvdev)
945{
946 struct rndis_device *rdev = nvdev->extension;
947
948 schedule_work(&rdev->mcast_work);
949}
950
951static int rndis_filter_init_device(struct rndis_device *dev,
952 struct netvsc_device *nvdev)
953{
954 struct rndis_request *request;
955 struct rndis_initialize_request *init;
956 struct rndis_initialize_complete *init_complete;
957 u32 status;
958 int ret;
959
960 request = get_rndis_request(dev, RNDIS_MSG_INIT,
961 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
962 if (!request) {
963 ret = -ENOMEM;
964 goto cleanup;
965 }
966
967
968 init = &request->request_msg.msg.init_req;
969 init->major_ver = RNDIS_MAJOR_VERSION;
970 init->minor_ver = RNDIS_MINOR_VERSION;
971 init->max_xfer_size = 0x4000;
972
973 dev->state = RNDIS_DEV_INITIALIZING;
974
975 ret = rndis_filter_send_request(dev, request);
976 if (ret != 0) {
977 dev->state = RNDIS_DEV_UNINITIALIZED;
978 goto cleanup;
979 }
980
981 wait_for_completion(&request->wait_event);
982
983 init_complete = &request->response_msg.msg.init_complete;
984 status = init_complete->status;
985 if (status == RNDIS_STATUS_SUCCESS) {
986 dev->state = RNDIS_DEV_INITIALIZED;
987 nvdev->max_pkt = init_complete->max_pkt_per_msg;
988 nvdev->pkt_align = 1 << init_complete->pkt_alignment_factor;
989 ret = 0;
990 } else {
991 dev->state = RNDIS_DEV_UNINITIALIZED;
992 ret = -EINVAL;
993 }
994
995cleanup:
996 if (request)
997 put_rndis_request(dev, request);
998
999 return ret;
1000}
1001
1002static bool netvsc_device_idle(const struct netvsc_device *nvdev)
1003{
1004 int i;
1005
1006 for (i = 0; i < nvdev->num_chn; i++) {
1007 const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
1008
1009 if (nvchan->mrc.first != nvchan->mrc.next)
1010 return false;
1011
1012 if (atomic_read(&nvchan->queue_sends) > 0)
1013 return false;
1014 }
1015
1016 return true;
1017}
1018
1019static void rndis_filter_halt_device(struct netvsc_device *nvdev,
1020 struct rndis_device *dev)
1021{
1022 struct rndis_request *request;
1023 struct rndis_halt_request *halt;
1024
1025
1026 request = get_rndis_request(dev, RNDIS_MSG_HALT,
1027 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
1028 if (!request)
1029 goto cleanup;
1030
1031
1032 halt = &request->request_msg.msg.halt_req;
1033 halt->req_id = atomic_inc_return(&dev->new_req_id);
1034
1035
1036 rndis_filter_send_request(dev, request);
1037
1038 dev->state = RNDIS_DEV_UNINITIALIZED;
1039
1040cleanup:
1041 nvdev->destroy = true;
1042
1043
1044 wmb();
1045
1046
1047 wait_event(nvdev->wait_drain, netvsc_device_idle(nvdev));
1048
1049 if (request)
1050 put_rndis_request(dev, request);
1051}
1052
1053static int rndis_filter_open_device(struct rndis_device *dev)
1054{
1055 int ret;
1056
1057 if (dev->state != RNDIS_DEV_INITIALIZED)
1058 return 0;
1059
1060 ret = rndis_filter_set_packet_filter(dev,
1061 NDIS_PACKET_TYPE_BROADCAST |
1062 NDIS_PACKET_TYPE_ALL_MULTICAST |
1063 NDIS_PACKET_TYPE_DIRECTED);
1064 if (ret == 0)
1065 dev->state = RNDIS_DEV_DATAINITIALIZED;
1066
1067 return ret;
1068}
1069
1070static int rndis_filter_close_device(struct rndis_device *dev)
1071{
1072 int ret;
1073
1074 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
1075 return 0;
1076
1077
1078 cancel_work_sync(&dev->mcast_work);
1079
1080 ret = rndis_filter_set_packet_filter(dev, 0);
1081 if (ret == -ENODEV)
1082 ret = 0;
1083
1084 if (ret == 0)
1085 dev->state = RNDIS_DEV_INITIALIZED;
1086
1087 return ret;
1088}
1089
1090static void netvsc_sc_open(struct vmbus_channel *new_sc)
1091{
1092 struct net_device *ndev =
1093 hv_get_drvdata(new_sc->primary_channel->device_obj);
1094 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1095 struct netvsc_device *nvscdev;
1096 u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
1097 struct netvsc_channel *nvchan;
1098 int ret;
1099
1100
1101
1102
1103 nvscdev = rcu_dereference_raw(ndev_ctx->nvdev);
1104 if (!nvscdev || chn_index >= nvscdev->num_chn)
1105 return;
1106
1107 nvchan = nvscdev->chan_table + chn_index;
1108
1109
1110
1111
1112 set_channel_read_mode(new_sc, HV_CALL_ISR);
1113
1114
1115 nvchan->channel = new_sc;
1116
1117 ret = vmbus_open(new_sc, netvsc_ring_bytes,
1118 netvsc_ring_bytes, NULL, 0,
1119 netvsc_channel_cb, nvchan);
1120 if (ret == 0)
1121 napi_enable(&nvchan->napi);
1122 else
1123 netdev_notice(ndev, "sub channel open failed: %d\n", ret);
1124
1125 if (atomic_inc_return(&nvscdev->open_chn) == nvscdev->num_chn)
1126 wake_up(&nvscdev->subchan_open);
1127}
1128
1129
1130
1131
1132
1133int rndis_set_subchannel(struct net_device *ndev,
1134 struct netvsc_device *nvdev,
1135 struct netvsc_device_info *dev_info)
1136{
1137 struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
1138 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1139 struct hv_device *hv_dev = ndev_ctx->device_ctx;
1140 struct rndis_device *rdev = nvdev->extension;
1141 int i, ret;
1142
1143 ASSERT_RTNL();
1144
1145 memset(init_packet, 0, sizeof(struct nvsp_message));
1146 init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
1147 init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
1148 init_packet->msg.v5_msg.subchn_req.num_subchannels =
1149 nvdev->num_chn - 1;
1150 trace_nvsp_send(ndev, init_packet);
1151
1152 ret = vmbus_sendpacket(hv_dev->channel, init_packet,
1153 sizeof(struct nvsp_message),
1154 (unsigned long)init_packet,
1155 VM_PKT_DATA_INBAND,
1156 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
1157 if (ret) {
1158 netdev_err(ndev, "sub channel allocate send failed: %d\n", ret);
1159 return ret;
1160 }
1161
1162 wait_for_completion(&nvdev->channel_init_wait);
1163 if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
1164 netdev_err(ndev, "sub channel request failed\n");
1165 return -EIO;
1166 }
1167
1168 nvdev->num_chn = 1 +
1169 init_packet->msg.v5_msg.subchn_comp.num_subchannels;
1170
1171
1172 wait_event(nvdev->subchan_open,
1173 atomic_read(&nvdev->open_chn) == nvdev->num_chn);
1174
1175 for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
1176 ndev_ctx->tx_table[i] = i % nvdev->num_chn;
1177
1178
1179 if (dev_info)
1180 rndis_filter_set_rss_param(rdev, dev_info->rss_key);
1181 else
1182 rndis_filter_set_rss_param(rdev, netvsc_hash_key);
1183
1184 netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
1185 netif_set_real_num_rx_queues(ndev, nvdev->num_chn);
1186
1187 return 0;
1188}
1189
1190static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
1191 struct netvsc_device *nvdev)
1192{
1193 struct net_device *net = rndis_device->ndev;
1194 struct net_device_context *net_device_ctx = netdev_priv(net);
1195 struct ndis_offload hwcaps;
1196 struct ndis_offload_params offloads;
1197 unsigned int gso_max_size = GSO_MAX_SIZE;
1198 int ret;
1199
1200
1201 ret = rndis_query_hwcaps(rndis_device, nvdev, &hwcaps);
1202 if (ret != 0)
1203 return ret;
1204
1205
1206 memset(&offloads, 0, sizeof(struct ndis_offload_params));
1207
1208
1209 offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED;
1210
1211
1212 net->hw_features &= ~NETVSC_SUPPORTED_HW_FEATURES;
1213 net_device_ctx->tx_checksum_mask = 0;
1214
1215
1216 net->hw_features |= NETIF_F_RXCSUM;
1217 net->hw_features |= NETIF_F_SG;
1218 net->hw_features |= NETIF_F_RXHASH;
1219
1220 if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
1221
1222 net->hw_features |= NETIF_F_IP_CSUM;
1223 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP;
1224
1225 offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1226
1227 if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) {
1228 offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1229 net->hw_features |= NETIF_F_TSO;
1230
1231 if (hwcaps.lsov2.ip4_maxsz < gso_max_size)
1232 gso_max_size = hwcaps.lsov2.ip4_maxsz;
1233 }
1234
1235 if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) {
1236 offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1237 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP;
1238 }
1239 }
1240
1241 if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) {
1242 net->hw_features |= NETIF_F_IPV6_CSUM;
1243
1244 offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1245 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP;
1246
1247 if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) &&
1248 (hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) {
1249 offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1250 net->hw_features |= NETIF_F_TSO6;
1251
1252 if (hwcaps.lsov2.ip6_maxsz < gso_max_size)
1253 gso_max_size = hwcaps.lsov2.ip6_maxsz;
1254 }
1255
1256 if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) {
1257 offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1258 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP;
1259 }
1260 }
1261
1262 if (hwcaps.rsc.ip4 && hwcaps.rsc.ip6) {
1263 net->hw_features |= NETIF_F_LRO;
1264
1265 if (net->features & NETIF_F_LRO) {
1266 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1267 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1268 } else {
1269 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1270 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1271 }
1272 }
1273
1274
1275
1276
1277 net->features &= ~NETVSC_SUPPORTED_HW_FEATURES | net->hw_features;
1278
1279 netif_set_gso_max_size(net, gso_max_size);
1280
1281 ret = rndis_filter_set_offload_params(net, nvdev, &offloads);
1282
1283 return ret;
1284}
1285
1286static void rndis_get_friendly_name(struct net_device *net,
1287 struct rndis_device *rndis_device,
1288 struct netvsc_device *net_device)
1289{
1290 ucs2_char_t wname[256];
1291 unsigned long len;
1292 u8 ifalias[256];
1293 u32 size;
1294
1295 size = sizeof(wname);
1296 if (rndis_filter_query_device(rndis_device, net_device,
1297 RNDIS_OID_GEN_FRIENDLY_NAME,
1298 wname, &size) != 0)
1299 return;
1300
1301 if (size == 0)
1302 return;
1303
1304
1305 len = ucs2_as_utf8(ifalias, wname, sizeof(ifalias));
1306
1307
1308 if (strcmp(ifalias, "Network Adapter") != 0)
1309 dev_set_alias(net, ifalias, len);
1310}
1311
1312struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
1313 struct netvsc_device_info *device_info)
1314{
1315 struct net_device *net = hv_get_drvdata(dev);
1316 struct net_device_context *ndc = netdev_priv(net);
1317 struct netvsc_device *net_device;
1318 struct rndis_device *rndis_device;
1319 struct ndis_recv_scale_cap rsscap;
1320 u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
1321 u32 mtu, size;
1322 u32 num_possible_rss_qs;
1323 int i, ret;
1324
1325 rndis_device = get_rndis_device();
1326 if (!rndis_device)
1327 return ERR_PTR(-ENODEV);
1328
1329
1330
1331
1332
1333 net_device = netvsc_device_add(dev, device_info);
1334 if (IS_ERR(net_device)) {
1335 kfree(rndis_device);
1336 return net_device;
1337 }
1338
1339
1340 net_device->max_chn = 1;
1341 net_device->num_chn = 1;
1342
1343 net_device->extension = rndis_device;
1344 rndis_device->ndev = net;
1345
1346
1347 ret = rndis_filter_init_device(rndis_device, net_device);
1348 if (ret != 0)
1349 goto err_dev_remv;
1350
1351
1352 size = sizeof(u32);
1353 ret = rndis_filter_query_device(rndis_device, net_device,
1354 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
1355 &mtu, &size);
1356 if (ret == 0 && size == sizeof(u32) && mtu < net->mtu)
1357 net->mtu = mtu;
1358
1359
1360 ret = rndis_filter_query_device_mac(rndis_device, net_device);
1361 if (ret != 0)
1362 goto err_dev_remv;
1363
1364 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
1365
1366
1367 if (!net->ifalias)
1368 rndis_get_friendly_name(net, rndis_device, net_device);
1369
1370
1371 ret = rndis_netdev_set_hwcaps(rndis_device, net_device);
1372 if (ret != 0)
1373 goto err_dev_remv;
1374
1375 rndis_filter_query_device_link_status(rndis_device, net_device);
1376
1377 netdev_dbg(net, "Device MAC %pM link state %s\n",
1378 rndis_device->hw_mac_adr,
1379 rndis_device->link_state ? "down" : "up");
1380
1381 if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
1382 goto out;
1383
1384 rndis_filter_query_link_speed(rndis_device, net_device);
1385
1386
1387 memset(&rsscap, 0, rsscap_size);
1388 ret = rndis_filter_query_device(rndis_device, net_device,
1389 OID_GEN_RECEIVE_SCALE_CAPABILITIES,
1390 &rsscap, &rsscap_size);
1391 if (ret || rsscap.num_recv_que < 2)
1392 goto out;
1393
1394
1395 num_possible_rss_qs = min_t(u32, num_online_cpus(),
1396 rsscap.num_recv_que);
1397
1398 net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, num_possible_rss_qs);
1399
1400
1401 net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
1402
1403 if (!netif_is_rxfh_configured(net)) {
1404 for (i = 0; i < ITAB_NUM; i++)
1405 ndc->rx_table[i] = ethtool_rxfh_indir_default(
1406 i, net_device->num_chn);
1407 }
1408
1409 atomic_set(&net_device->open_chn, 1);
1410 vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
1411
1412 for (i = 1; i < net_device->num_chn; i++) {
1413 ret = netvsc_alloc_recv_comp_ring(net_device, i);
1414 if (ret) {
1415 while (--i != 0)
1416 vfree(net_device->chan_table[i].mrc.slots);
1417 goto out;
1418 }
1419 }
1420
1421 for (i = 1; i < net_device->num_chn; i++)
1422 netif_napi_add(net, &net_device->chan_table[i].napi,
1423 netvsc_poll, NAPI_POLL_WEIGHT);
1424
1425 return net_device;
1426
1427out:
1428
1429 net_device->max_chn = 1;
1430 net_device->num_chn = 1;
1431 return net_device;
1432
1433err_dev_remv:
1434 rndis_filter_device_remove(dev, net_device);
1435 return ERR_PTR(ret);
1436}
1437
1438void rndis_filter_device_remove(struct hv_device *dev,
1439 struct netvsc_device *net_dev)
1440{
1441 struct rndis_device *rndis_dev = net_dev->extension;
1442
1443
1444 rndis_filter_halt_device(net_dev, rndis_dev);
1445
1446 netvsc_device_remove(dev);
1447}
1448
1449int rndis_filter_open(struct netvsc_device *nvdev)
1450{
1451 if (!nvdev)
1452 return -EINVAL;
1453
1454 return rndis_filter_open_device(nvdev->extension);
1455}
1456
1457int rndis_filter_close(struct netvsc_device *nvdev)
1458{
1459 if (!nvdev)
1460 return -EINVAL;
1461
1462 return rndis_filter_close_device(nvdev->extension);
1463}
1464
