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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
279
280
281
282 if (resp->msg_len - RNDIS_HEADER_SIZE < sizeof(u32)) {
283 netdev_err(ndev, "rndis msg_len too small: %u\n",
284 resp->msg_len);
285 return;
286 }
287
288 spin_lock_irqsave(&dev->request_lock, flags);
289 list_for_each_entry(request, &dev->req_list, list_ent) {
290
291
292
293
294 if (request->request_msg.msg.init_req.req_id
295 == resp->msg.init_complete.req_id) {
296 found = true;
297 break;
298 }
299 }
300 spin_unlock_irqrestore(&dev->request_lock, flags);
301
302 if (found) {
303 if (resp->msg_len <=
304 sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
305 memcpy(&request->response_msg, resp,
306 resp->msg_len);
307 if (request->request_msg.ndis_msg_type ==
308 RNDIS_MSG_QUERY && request->request_msg.msg.
309 query_req.oid == RNDIS_OID_GEN_MEDIA_CONNECT_STATUS)
310 rndis_set_link_state(dev, request);
311 } else {
312 netdev_err(ndev,
313 "rndis response buffer overflow "
314 "detected (size %u max %zu)\n",
315 resp->msg_len,
316 sizeof(struct rndis_message));
317
318 if (resp->ndis_msg_type ==
319 RNDIS_MSG_RESET_C) {
320
321 request->response_msg.msg.reset_complete.
322 status = RNDIS_STATUS_BUFFER_OVERFLOW;
323 } else {
324 request->response_msg.msg.
325 init_complete.status =
326 RNDIS_STATUS_BUFFER_OVERFLOW;
327 }
328 }
329
330 complete(&request->wait_event);
331 } else {
332 netdev_err(ndev,
333 "no rndis request found for this response "
334 "(id 0x%x res type 0x%x)\n",
335 resp->msg.init_complete.req_id,
336 resp->ndis_msg_type);
337 }
338}
339
340
341
342
343
344static inline void *rndis_get_ppi(struct net_device *ndev,
345 struct rndis_packet *rpkt,
346 u32 rpkt_len, u32 type, u8 internal)
347{
348 struct rndis_per_packet_info *ppi;
349 int len;
350
351 if (rpkt->per_pkt_info_offset == 0)
352 return NULL;
353
354
355 if (rpkt->per_pkt_info_offset < sizeof(struct rndis_packet) ||
356 rpkt->per_pkt_info_offset > rpkt_len) {
357 netdev_err(ndev, "Invalid per_pkt_info_offset: %u\n",
358 rpkt->per_pkt_info_offset);
359 return NULL;
360 }
361
362 if (rpkt->per_pkt_info_len > rpkt_len - rpkt->per_pkt_info_offset) {
363 netdev_err(ndev, "Invalid per_pkt_info_len: %u\n",
364 rpkt->per_pkt_info_len);
365 return NULL;
366 }
367
368 ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
369 rpkt->per_pkt_info_offset);
370 len = rpkt->per_pkt_info_len;
371
372 while (len > 0) {
373
374 if (ppi->size > len) {
375 netdev_err(ndev, "Invalid ppi size: %u\n", ppi->size);
376 continue;
377 }
378
379 if (ppi->ppi_offset >= ppi->size) {
380 netdev_err(ndev, "Invalid ppi_offset: %u\n", ppi->ppi_offset);
381 continue;
382 }
383
384 if (ppi->type == type && ppi->internal == internal)
385 return (void *)((ulong)ppi + ppi->ppi_offset);
386 len -= ppi->size;
387 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
388 }
389
390 return NULL;
391}
392
393static inline
394void rsc_add_data(struct netvsc_channel *nvchan,
395 const struct ndis_pkt_8021q_info *vlan,
396 const struct ndis_tcp_ip_checksum_info *csum_info,
397 const u32 *hash_info,
398 void *data, u32 len)
399{
400 u32 cnt = nvchan->rsc.cnt;
401
402 if (cnt) {
403 nvchan->rsc.pktlen += len;
404 } else {
405 nvchan->rsc.vlan = vlan;
406 nvchan->rsc.csum_info = csum_info;
407 nvchan->rsc.pktlen = len;
408 nvchan->rsc.hash_info = hash_info;
409 }
410
411 nvchan->rsc.data[cnt] = data;
412 nvchan->rsc.len[cnt] = len;
413 nvchan->rsc.cnt++;
414}
415
416static int rndis_filter_receive_data(struct net_device *ndev,
417 struct netvsc_device *nvdev,
418 struct netvsc_channel *nvchan,
419 struct rndis_message *msg,
420 u32 data_buflen)
421{
422 struct rndis_packet *rndis_pkt = &msg->msg.pkt;
423 const struct ndis_tcp_ip_checksum_info *csum_info;
424 const struct ndis_pkt_8021q_info *vlan;
425 const struct rndis_pktinfo_id *pktinfo_id;
426 const u32 *hash_info;
427 u32 data_offset, rpkt_len;
428 void *data;
429 bool rsc_more = false;
430 int ret;
431
432
433 if (data_buflen < RNDIS_HEADER_SIZE + sizeof(struct rndis_packet)) {
434 netdev_err(ndev, "invalid rndis pkt, data_buflen too small: %u\n",
435 data_buflen);
436 return NVSP_STAT_FAIL;
437 }
438
439
440 if (rndis_pkt->data_offset >= data_buflen - RNDIS_HEADER_SIZE) {
441 netdev_err(ndev, "invalid rndis packet offset: %u\n",
442 rndis_pkt->data_offset);
443 return NVSP_STAT_FAIL;
444 }
445
446
447 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
448
449 rpkt_len = data_buflen - RNDIS_HEADER_SIZE;
450 data_buflen -= data_offset;
451
452
453
454
455
456 if (unlikely(data_buflen < rndis_pkt->data_len)) {
457 netdev_err(ndev, "rndis message buffer "
458 "overflow detected (got %u, min %u)"
459 "...dropping this message!\n",
460 data_buflen, rndis_pkt->data_len);
461 return NVSP_STAT_FAIL;
462 }
463
464 vlan = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, IEEE_8021Q_INFO, 0);
465
466 csum_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, TCPIP_CHKSUM_PKTINFO, 0);
467
468 hash_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, NBL_HASH_VALUE, 0);
469
470 pktinfo_id = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, RNDIS_PKTINFO_ID, 1);
471
472 data = (void *)msg + data_offset;
473
474
475 if (pktinfo_id && (pktinfo_id->flag & RNDIS_PKTINFO_SUBALLOC)) {
476 if (pktinfo_id->flag & RNDIS_PKTINFO_1ST_FRAG)
477 nvchan->rsc.cnt = 0;
478 else if (nvchan->rsc.cnt == 0)
479 goto drop;
480
481 rsc_more = true;
482
483 if (pktinfo_id->flag & RNDIS_PKTINFO_LAST_FRAG)
484 rsc_more = false;
485
486 if (rsc_more && nvchan->rsc.is_last)
487 goto drop;
488 } else {
489 nvchan->rsc.cnt = 0;
490 }
491
492 if (unlikely(nvchan->rsc.cnt >= NVSP_RSC_MAX))
493 goto drop;
494
495
496
497
498
499
500 rsc_add_data(nvchan, vlan, csum_info, hash_info,
501 data, rndis_pkt->data_len);
502
503 if (rsc_more)
504 return NVSP_STAT_SUCCESS;
505
506 ret = netvsc_recv_callback(ndev, nvdev, nvchan);
507 nvchan->rsc.cnt = 0;
508
509 return ret;
510
511drop:
512
513 nvchan->rsc.cnt = 0;
514 return NVSP_STAT_FAIL;
515}
516
517int rndis_filter_receive(struct net_device *ndev,
518 struct netvsc_device *net_dev,
519 struct netvsc_channel *nvchan,
520 void *data, u32 buflen)
521{
522 struct net_device_context *net_device_ctx = netdev_priv(ndev);
523 struct rndis_message *rndis_msg = data;
524
525 if (netif_msg_rx_status(net_device_ctx))
526 dump_rndis_message(ndev, rndis_msg);
527
528
529 if (buflen < RNDIS_HEADER_SIZE || rndis_msg->msg_len < RNDIS_HEADER_SIZE ||
530 buflen < rndis_msg->msg_len) {
531 netdev_err(ndev, "Invalid rndis_msg (buflen: %u, msg_len: %u)\n",
532 buflen, rndis_msg->msg_len);
533 return NVSP_STAT_FAIL;
534 }
535
536 switch (rndis_msg->ndis_msg_type) {
537 case RNDIS_MSG_PACKET:
538 return rndis_filter_receive_data(ndev, net_dev, nvchan,
539 rndis_msg, buflen);
540 case RNDIS_MSG_INIT_C:
541 case RNDIS_MSG_QUERY_C:
542 case RNDIS_MSG_SET_C:
543
544 rndis_filter_receive_response(ndev, net_dev, rndis_msg);
545 break;
546
547 case RNDIS_MSG_INDICATE:
548
549 netvsc_linkstatus_callback(ndev, rndis_msg);
550 break;
551 default:
552 netdev_err(ndev,
553 "unhandled rndis message (type %u len %u)\n",
554 rndis_msg->ndis_msg_type,
555 rndis_msg->msg_len);
556 return NVSP_STAT_FAIL;
557 }
558
559 return NVSP_STAT_SUCCESS;
560}
561
562static int rndis_filter_query_device(struct rndis_device *dev,
563 struct netvsc_device *nvdev,
564 u32 oid, void *result, u32 *result_size)
565{
566 struct rndis_request *request;
567 u32 inresult_size = *result_size;
568 struct rndis_query_request *query;
569 struct rndis_query_complete *query_complete;
570 int ret = 0;
571
572 if (!result)
573 return -EINVAL;
574
575 *result_size = 0;
576 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
577 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
578 if (!request) {
579 ret = -ENOMEM;
580 goto cleanup;
581 }
582
583
584 query = &request->request_msg.msg.query_req;
585 query->oid = oid;
586 query->info_buf_offset = sizeof(struct rndis_query_request);
587 query->info_buflen = 0;
588 query->dev_vc_handle = 0;
589
590 if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) {
591 struct ndis_offload *hwcaps;
592 u32 nvsp_version = nvdev->nvsp_version;
593 u8 ndis_rev;
594 size_t size;
595
596 if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) {
597 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
598 size = NDIS_OFFLOAD_SIZE;
599 } else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) {
600 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2;
601 size = NDIS_OFFLOAD_SIZE_6_1;
602 } else {
603 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1;
604 size = NDIS_OFFLOAD_SIZE_6_0;
605 }
606
607 request->request_msg.msg_len += size;
608 query->info_buflen = size;
609 hwcaps = (struct ndis_offload *)
610 ((unsigned long)query + query->info_buf_offset);
611
612 hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD;
613 hwcaps->header.revision = ndis_rev;
614 hwcaps->header.size = size;
615
616 } else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
617 struct ndis_recv_scale_cap *cap;
618
619 request->request_msg.msg_len +=
620 sizeof(struct ndis_recv_scale_cap);
621 query->info_buflen = sizeof(struct ndis_recv_scale_cap);
622 cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
623 query->info_buf_offset);
624 cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
625 cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
626 cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
627 }
628
629 ret = rndis_filter_send_request(dev, request);
630 if (ret != 0)
631 goto cleanup;
632
633 wait_for_completion(&request->wait_event);
634
635
636 query_complete = &request->response_msg.msg.query_complete;
637
638 if (query_complete->info_buflen > inresult_size) {
639 ret = -1;
640 goto cleanup;
641 }
642
643 memcpy(result,
644 (void *)((unsigned long)query_complete +
645 query_complete->info_buf_offset),
646 query_complete->info_buflen);
647
648 *result_size = query_complete->info_buflen;
649
650cleanup:
651 if (request)
652 put_rndis_request(dev, request);
653
654 return ret;
655}
656
657
658static int
659rndis_query_hwcaps(struct rndis_device *dev, struct netvsc_device *net_device,
660 struct ndis_offload *caps)
661{
662 u32 caps_len = sizeof(*caps);
663 int ret;
664
665 memset(caps, 0, sizeof(*caps));
666
667 ret = rndis_filter_query_device(dev, net_device,
668 OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
669 caps, &caps_len);
670 if (ret)
671 return ret;
672
673 if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) {
674 netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n",
675 caps->header.type);
676 return -EINVAL;
677 }
678
679 if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) {
680 netdev_warn(dev->ndev, "invalid NDIS objrev %x\n",
681 caps->header.revision);
682 return -EINVAL;
683 }
684
685 if (caps->header.size > caps_len ||
686 caps->header.size < NDIS_OFFLOAD_SIZE_6_0) {
687 netdev_warn(dev->ndev,
688 "invalid NDIS objsize %u, data size %u\n",
689 caps->header.size, caps_len);
690 return -EINVAL;
691 }
692
693 return 0;
694}
695
696static int rndis_filter_query_device_mac(struct rndis_device *dev,
697 struct netvsc_device *net_device)
698{
699 u32 size = ETH_ALEN;
700
701 return rndis_filter_query_device(dev, net_device,
702 RNDIS_OID_802_3_PERMANENT_ADDRESS,
703 dev->hw_mac_adr, &size);
704}
705
706#define NWADR_STR "NetworkAddress"
707#define NWADR_STRLEN 14
708
709int rndis_filter_set_device_mac(struct netvsc_device *nvdev,
710 const char *mac)
711{
712 struct rndis_device *rdev = nvdev->extension;
713 struct rndis_request *request;
714 struct rndis_set_request *set;
715 struct rndis_config_parameter_info *cpi;
716 wchar_t *cfg_nwadr, *cfg_mac;
717 struct rndis_set_complete *set_complete;
718 char macstr[2*ETH_ALEN+1];
719 u32 extlen = sizeof(struct rndis_config_parameter_info) +
720 2*NWADR_STRLEN + 4*ETH_ALEN;
721 int ret;
722
723 request = get_rndis_request(rdev, RNDIS_MSG_SET,
724 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
725 if (!request)
726 return -ENOMEM;
727
728 set = &request->request_msg.msg.set_req;
729 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
730 set->info_buflen = extlen;
731 set->info_buf_offset = sizeof(struct rndis_set_request);
732 set->dev_vc_handle = 0;
733
734 cpi = (struct rndis_config_parameter_info *)((ulong)set +
735 set->info_buf_offset);
736 cpi->parameter_name_offset =
737 sizeof(struct rndis_config_parameter_info);
738
739 cpi->parameter_name_length = 2*NWADR_STRLEN;
740 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
741 cpi->parameter_value_offset =
742 cpi->parameter_name_offset + cpi->parameter_name_length;
743
744 cpi->parameter_value_length = 4*ETH_ALEN;
745
746 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
747 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
748 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
749 cfg_nwadr, NWADR_STRLEN);
750 if (ret < 0)
751 goto cleanup;
752 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
753 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
754 cfg_mac, 2*ETH_ALEN);
755 if (ret < 0)
756 goto cleanup;
757
758 ret = rndis_filter_send_request(rdev, request);
759 if (ret != 0)
760 goto cleanup;
761
762 wait_for_completion(&request->wait_event);
763
764 set_complete = &request->response_msg.msg.set_complete;
765 if (set_complete->status != RNDIS_STATUS_SUCCESS)
766 ret = -EIO;
767
768cleanup:
769 put_rndis_request(rdev, request);
770 return ret;
771}
772
773int
774rndis_filter_set_offload_params(struct net_device *ndev,
775 struct netvsc_device *nvdev,
776 struct ndis_offload_params *req_offloads)
777{
778 struct rndis_device *rdev = nvdev->extension;
779 struct rndis_request *request;
780 struct rndis_set_request *set;
781 struct ndis_offload_params *offload_params;
782 struct rndis_set_complete *set_complete;
783 u32 extlen = sizeof(struct ndis_offload_params);
784 int ret;
785 u32 vsp_version = nvdev->nvsp_version;
786
787 if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
788 extlen = VERSION_4_OFFLOAD_SIZE;
789
790
791
792 req_offloads->udp_ip_v4_csum = 0;
793 req_offloads->udp_ip_v6_csum = 0;
794 }
795
796 request = get_rndis_request(rdev, RNDIS_MSG_SET,
797 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
798 if (!request)
799 return -ENOMEM;
800
801 set = &request->request_msg.msg.set_req;
802 set->oid = OID_TCP_OFFLOAD_PARAMETERS;
803 set->info_buflen = extlen;
804 set->info_buf_offset = sizeof(struct rndis_set_request);
805 set->dev_vc_handle = 0;
806
807 offload_params = (struct ndis_offload_params *)((ulong)set +
808 set->info_buf_offset);
809 *offload_params = *req_offloads;
810 offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
811 offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
812 offload_params->header.size = extlen;
813
814 ret = rndis_filter_send_request(rdev, request);
815 if (ret != 0)
816 goto cleanup;
817
818 wait_for_completion(&request->wait_event);
819 set_complete = &request->response_msg.msg.set_complete;
820 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
821 netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
822 set_complete->status);
823 ret = -EINVAL;
824 }
825
826cleanup:
827 put_rndis_request(rdev, request);
828 return ret;
829}
830
831static int rndis_set_rss_param_msg(struct rndis_device *rdev,
832 const u8 *rss_key, u16 flag)
833{
834 struct net_device *ndev = rdev->ndev;
835 struct net_device_context *ndc = netdev_priv(ndev);
836 struct rndis_request *request;
837 struct rndis_set_request *set;
838 struct rndis_set_complete *set_complete;
839 u32 extlen = sizeof(struct ndis_recv_scale_param) +
840 4 * ITAB_NUM + NETVSC_HASH_KEYLEN;
841 struct ndis_recv_scale_param *rssp;
842 u32 *itab;
843 u8 *keyp;
844 int i, ret;
845
846 request = get_rndis_request(
847 rdev, RNDIS_MSG_SET,
848 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
849 if (!request)
850 return -ENOMEM;
851
852 set = &request->request_msg.msg.set_req;
853 set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
854 set->info_buflen = extlen;
855 set->info_buf_offset = sizeof(struct rndis_set_request);
856 set->dev_vc_handle = 0;
857
858 rssp = (struct ndis_recv_scale_param *)(set + 1);
859 rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
860 rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
861 rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
862 rssp->flag = flag;
863 rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
864 NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
865 NDIS_HASH_TCP_IPV6;
866 rssp->indirect_tabsize = 4*ITAB_NUM;
867 rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
868 rssp->hashkey_size = NETVSC_HASH_KEYLEN;
869 rssp->hashkey_offset = rssp->indirect_taboffset +
870 rssp->indirect_tabsize;
871
872
873 itab = (u32 *)(rssp + 1);
874 for (i = 0; i < ITAB_NUM; i++)
875 itab[i] = ndc->rx_table[i];
876
877
878 keyp = (u8 *)((unsigned long)rssp + rssp->hashkey_offset);
879 memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
880
881 ret = rndis_filter_send_request(rdev, request);
882 if (ret != 0)
883 goto cleanup;
884
885 wait_for_completion(&request->wait_event);
886 set_complete = &request->response_msg.msg.set_complete;
887 if (set_complete->status == RNDIS_STATUS_SUCCESS) {
888 if (!(flag & NDIS_RSS_PARAM_FLAG_DISABLE_RSS) &&
889 !(flag & NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED))
890 memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
891
892 } else {
893 netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
894 set_complete->status);
895 ret = -EINVAL;
896 }
897
898cleanup:
899 put_rndis_request(rdev, request);
900 return ret;
901}
902
903int rndis_filter_set_rss_param(struct rndis_device *rdev,
904 const u8 *rss_key)
905{
906
907 rndis_set_rss_param_msg(rdev, rss_key,
908 NDIS_RSS_PARAM_FLAG_DISABLE_RSS);
909
910 return rndis_set_rss_param_msg(rdev, rss_key, 0);
911}
912
913static int rndis_filter_query_device_link_status(struct rndis_device *dev,
914 struct netvsc_device *net_device)
915{
916 u32 size = sizeof(u32);
917 u32 link_status;
918
919 return rndis_filter_query_device(dev, net_device,
920 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
921 &link_status, &size);
922}
923
924static int rndis_filter_query_link_speed(struct rndis_device *dev,
925 struct netvsc_device *net_device)
926{
927 u32 size = sizeof(u32);
928 u32 link_speed;
929 struct net_device_context *ndc;
930 int ret;
931
932 ret = rndis_filter_query_device(dev, net_device,
933 RNDIS_OID_GEN_LINK_SPEED,
934 &link_speed, &size);
935
936 if (!ret) {
937 ndc = netdev_priv(dev->ndev);
938
939
940
941
942 ndc->speed = link_speed / 10000;
943 }
944
945 return ret;
946}
947
948static int rndis_filter_set_packet_filter(struct rndis_device *dev,
949 u32 new_filter)
950{
951 struct rndis_request *request;
952 struct rndis_set_request *set;
953 int ret;
954
955 if (dev->filter == new_filter)
956 return 0;
957
958 request = get_rndis_request(dev, RNDIS_MSG_SET,
959 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
960 sizeof(u32));
961 if (!request)
962 return -ENOMEM;
963
964
965 set = &request->request_msg.msg.set_req;
966 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
967 set->info_buflen = sizeof(u32);
968 set->info_buf_offset = sizeof(struct rndis_set_request);
969
970 memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
971 &new_filter, sizeof(u32));
972
973 ret = rndis_filter_send_request(dev, request);
974 if (ret == 0) {
975 wait_for_completion(&request->wait_event);
976 dev->filter = new_filter;
977 }
978
979 put_rndis_request(dev, request);
980
981 return ret;
982}
983
984static void rndis_set_multicast(struct work_struct *w)
985{
986 struct rndis_device *rdev
987 = container_of(w, struct rndis_device, mcast_work);
988 u32 filter = NDIS_PACKET_TYPE_DIRECTED;
989 unsigned int flags = rdev->ndev->flags;
990
991 if (flags & IFF_PROMISC) {
992 filter = NDIS_PACKET_TYPE_PROMISCUOUS;
993 } else {
994 if (!netdev_mc_empty(rdev->ndev) || (flags & IFF_ALLMULTI))
995 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
996 if (flags & IFF_BROADCAST)
997 filter |= NDIS_PACKET_TYPE_BROADCAST;
998 }
999
1000 rndis_filter_set_packet_filter(rdev, filter);
1001}
1002
1003void rndis_filter_update(struct netvsc_device *nvdev)
1004{
1005 struct rndis_device *rdev = nvdev->extension;
1006
1007 schedule_work(&rdev->mcast_work);
1008}
1009
1010static int rndis_filter_init_device(struct rndis_device *dev,
1011 struct netvsc_device *nvdev)
1012{
1013 struct rndis_request *request;
1014 struct rndis_initialize_request *init;
1015 struct rndis_initialize_complete *init_complete;
1016 u32 status;
1017 int ret;
1018
1019 request = get_rndis_request(dev, RNDIS_MSG_INIT,
1020 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
1021 if (!request) {
1022 ret = -ENOMEM;
1023 goto cleanup;
1024 }
1025
1026
1027 init = &request->request_msg.msg.init_req;
1028 init->major_ver = RNDIS_MAJOR_VERSION;
1029 init->minor_ver = RNDIS_MINOR_VERSION;
1030 init->max_xfer_size = 0x4000;
1031
1032 dev->state = RNDIS_DEV_INITIALIZING;
1033
1034 ret = rndis_filter_send_request(dev, request);
1035 if (ret != 0) {
1036 dev->state = RNDIS_DEV_UNINITIALIZED;
1037 goto cleanup;
1038 }
1039
1040 wait_for_completion(&request->wait_event);
1041
1042 init_complete = &request->response_msg.msg.init_complete;
1043 status = init_complete->status;
1044 if (status == RNDIS_STATUS_SUCCESS) {
1045 dev->state = RNDIS_DEV_INITIALIZED;
1046 nvdev->max_pkt = init_complete->max_pkt_per_msg;
1047 nvdev->pkt_align = 1 << init_complete->pkt_alignment_factor;
1048 ret = 0;
1049 } else {
1050 dev->state = RNDIS_DEV_UNINITIALIZED;
1051 ret = -EINVAL;
1052 }
1053
1054cleanup:
1055 if (request)
1056 put_rndis_request(dev, request);
1057
1058 return ret;
1059}
1060
1061static bool netvsc_device_idle(const struct netvsc_device *nvdev)
1062{
1063 int i;
1064
1065 for (i = 0; i < nvdev->num_chn; i++) {
1066 const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
1067
1068 if (nvchan->mrc.first != nvchan->mrc.next)
1069 return false;
1070
1071 if (atomic_read(&nvchan->queue_sends) > 0)
1072 return false;
1073 }
1074
1075 return true;
1076}
1077
1078static void rndis_filter_halt_device(struct netvsc_device *nvdev,
1079 struct rndis_device *dev)
1080{
1081 struct rndis_request *request;
1082 struct rndis_halt_request *halt;
1083
1084
1085 request = get_rndis_request(dev, RNDIS_MSG_HALT,
1086 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
1087 if (!request)
1088 goto cleanup;
1089
1090
1091 halt = &request->request_msg.msg.halt_req;
1092 halt->req_id = atomic_inc_return(&dev->new_req_id);
1093
1094
1095 rndis_filter_send_request(dev, request);
1096
1097 dev->state = RNDIS_DEV_UNINITIALIZED;
1098
1099cleanup:
1100 nvdev->destroy = true;
1101
1102
1103 wmb();
1104
1105
1106 wait_event(nvdev->wait_drain, netvsc_device_idle(nvdev));
1107
1108 if (request)
1109 put_rndis_request(dev, request);
1110}
1111
1112static int rndis_filter_open_device(struct rndis_device *dev)
1113{
1114 int ret;
1115
1116 if (dev->state != RNDIS_DEV_INITIALIZED)
1117 return 0;
1118
1119 ret = rndis_filter_set_packet_filter(dev,
1120 NDIS_PACKET_TYPE_BROADCAST |
1121 NDIS_PACKET_TYPE_ALL_MULTICAST |
1122 NDIS_PACKET_TYPE_DIRECTED);
1123 if (ret == 0)
1124 dev->state = RNDIS_DEV_DATAINITIALIZED;
1125
1126 return ret;
1127}
1128
1129static int rndis_filter_close_device(struct rndis_device *dev)
1130{
1131 int ret;
1132
1133 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
1134 return 0;
1135
1136
1137 cancel_work_sync(&dev->mcast_work);
1138
1139 ret = rndis_filter_set_packet_filter(dev, 0);
1140 if (ret == -ENODEV)
1141 ret = 0;
1142
1143 if (ret == 0)
1144 dev->state = RNDIS_DEV_INITIALIZED;
1145
1146 return ret;
1147}
1148
1149static void netvsc_sc_open(struct vmbus_channel *new_sc)
1150{
1151 struct net_device *ndev =
1152 hv_get_drvdata(new_sc->primary_channel->device_obj);
1153 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1154 struct netvsc_device *nvscdev;
1155 u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
1156 struct netvsc_channel *nvchan;
1157 int ret;
1158
1159
1160
1161
1162 nvscdev = rcu_dereference_raw(ndev_ctx->nvdev);
1163 if (!nvscdev || chn_index >= nvscdev->num_chn)
1164 return;
1165
1166 nvchan = nvscdev->chan_table + chn_index;
1167
1168
1169
1170
1171 set_channel_read_mode(new_sc, HV_CALL_ISR);
1172
1173
1174 nvchan->channel = new_sc;
1175
1176 ret = vmbus_open(new_sc, netvsc_ring_bytes,
1177 netvsc_ring_bytes, NULL, 0,
1178 netvsc_channel_cb, nvchan);
1179 if (ret == 0)
1180 napi_enable(&nvchan->napi);
1181 else
1182 netdev_notice(ndev, "sub channel open failed: %d\n", ret);
1183
1184 if (atomic_inc_return(&nvscdev->open_chn) == nvscdev->num_chn)
1185 wake_up(&nvscdev->subchan_open);
1186}
1187
1188
1189
1190
1191
1192int rndis_set_subchannel(struct net_device *ndev,
1193 struct netvsc_device *nvdev,
1194 struct netvsc_device_info *dev_info)
1195{
1196 struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
1197 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1198 struct hv_device *hv_dev = ndev_ctx->device_ctx;
1199 struct rndis_device *rdev = nvdev->extension;
1200 int i, ret;
1201
1202 ASSERT_RTNL();
1203
1204 memset(init_packet, 0, sizeof(struct nvsp_message));
1205 init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
1206 init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
1207 init_packet->msg.v5_msg.subchn_req.num_subchannels =
1208 nvdev->num_chn - 1;
1209 trace_nvsp_send(ndev, init_packet);
1210
1211 ret = vmbus_sendpacket(hv_dev->channel, init_packet,
1212 sizeof(struct nvsp_message),
1213 (unsigned long)init_packet,
1214 VM_PKT_DATA_INBAND,
1215 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
1216 if (ret) {
1217 netdev_err(ndev, "sub channel allocate send failed: %d\n", ret);
1218 return ret;
1219 }
1220
1221 wait_for_completion(&nvdev->channel_init_wait);
1222 if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
1223 netdev_err(ndev, "sub channel request failed\n");
1224 return -EIO;
1225 }
1226
1227 nvdev->num_chn = 1 +
1228 init_packet->msg.v5_msg.subchn_comp.num_subchannels;
1229
1230
1231 wait_event(nvdev->subchan_open,
1232 atomic_read(&nvdev->open_chn) == nvdev->num_chn);
1233
1234 for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
1235 ndev_ctx->tx_table[i] = i % nvdev->num_chn;
1236
1237
1238 if (dev_info)
1239 rndis_filter_set_rss_param(rdev, dev_info->rss_key);
1240 else
1241 rndis_filter_set_rss_param(rdev, netvsc_hash_key);
1242
1243 netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
1244 netif_set_real_num_rx_queues(ndev, nvdev->num_chn);
1245
1246 return 0;
1247}
1248
1249static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
1250 struct netvsc_device *nvdev)
1251{
1252 struct net_device *net = rndis_device->ndev;
1253 struct net_device_context *net_device_ctx = netdev_priv(net);
1254 struct ndis_offload hwcaps;
1255 struct ndis_offload_params offloads;
1256 unsigned int gso_max_size = GSO_MAX_SIZE;
1257 int ret;
1258
1259
1260 ret = rndis_query_hwcaps(rndis_device, nvdev, &hwcaps);
1261 if (ret != 0)
1262 return ret;
1263
1264
1265 memset(&offloads, 0, sizeof(struct ndis_offload_params));
1266
1267
1268 offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED;
1269
1270
1271 net->hw_features &= ~NETVSC_SUPPORTED_HW_FEATURES;
1272 net_device_ctx->tx_checksum_mask = 0;
1273
1274
1275 net->hw_features |= NETIF_F_RXCSUM;
1276 net->hw_features |= NETIF_F_SG;
1277 net->hw_features |= NETIF_F_RXHASH;
1278
1279 if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
1280
1281 net->hw_features |= NETIF_F_IP_CSUM;
1282 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP;
1283
1284 offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1285
1286 if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) {
1287 offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1288 net->hw_features |= NETIF_F_TSO;
1289
1290 if (hwcaps.lsov2.ip4_maxsz < gso_max_size)
1291 gso_max_size = hwcaps.lsov2.ip4_maxsz;
1292 }
1293
1294 if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) {
1295 offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1296 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP;
1297 }
1298 }
1299
1300 if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) {
1301 net->hw_features |= NETIF_F_IPV6_CSUM;
1302
1303 offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1304 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP;
1305
1306 if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) &&
1307 (hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) {
1308 offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1309 net->hw_features |= NETIF_F_TSO6;
1310
1311 if (hwcaps.lsov2.ip6_maxsz < gso_max_size)
1312 gso_max_size = hwcaps.lsov2.ip6_maxsz;
1313 }
1314
1315 if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) {
1316 offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1317 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP;
1318 }
1319 }
1320
1321 if (hwcaps.rsc.ip4 && hwcaps.rsc.ip6) {
1322 net->hw_features |= NETIF_F_LRO;
1323
1324 if (net->features & NETIF_F_LRO) {
1325 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1326 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1327 } else {
1328 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1329 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1330 }
1331 }
1332
1333
1334
1335
1336 net->features &= ~NETVSC_SUPPORTED_HW_FEATURES | net->hw_features;
1337
1338 netif_set_gso_max_size(net, gso_max_size);
1339
1340 ret = rndis_filter_set_offload_params(net, nvdev, &offloads);
1341
1342 return ret;
1343}
1344
1345static void rndis_get_friendly_name(struct net_device *net,
1346 struct rndis_device *rndis_device,
1347 struct netvsc_device *net_device)
1348{
1349 ucs2_char_t wname[256];
1350 unsigned long len;
1351 u8 ifalias[256];
1352 u32 size;
1353
1354 size = sizeof(wname);
1355 if (rndis_filter_query_device(rndis_device, net_device,
1356 RNDIS_OID_GEN_FRIENDLY_NAME,
1357 wname, &size) != 0)
1358 return;
1359
1360 if (size == 0)
1361 return;
1362
1363
1364 len = ucs2_as_utf8(ifalias, wname, sizeof(ifalias));
1365
1366
1367 if (strcmp(ifalias, "Network Adapter") != 0)
1368 dev_set_alias(net, ifalias, len);
1369}
1370
1371struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
1372 struct netvsc_device_info *device_info)
1373{
1374 struct net_device *net = hv_get_drvdata(dev);
1375 struct net_device_context *ndc = netdev_priv(net);
1376 struct netvsc_device *net_device;
1377 struct rndis_device *rndis_device;
1378 struct ndis_recv_scale_cap rsscap;
1379 u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
1380 u32 mtu, size;
1381 u32 num_possible_rss_qs;
1382 int i, ret;
1383
1384 rndis_device = get_rndis_device();
1385 if (!rndis_device)
1386 return ERR_PTR(-ENODEV);
1387
1388
1389
1390
1391
1392 net_device = netvsc_device_add(dev, device_info);
1393 if (IS_ERR(net_device)) {
1394 kfree(rndis_device);
1395 return net_device;
1396 }
1397
1398
1399 net_device->max_chn = 1;
1400 net_device->num_chn = 1;
1401
1402 net_device->extension = rndis_device;
1403 rndis_device->ndev = net;
1404
1405
1406 ret = rndis_filter_init_device(rndis_device, net_device);
1407 if (ret != 0)
1408 goto err_dev_remv;
1409
1410
1411 size = sizeof(u32);
1412 ret = rndis_filter_query_device(rndis_device, net_device,
1413 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
1414 &mtu, &size);
1415 if (ret == 0 && size == sizeof(u32) && mtu < net->mtu)
1416 net->mtu = mtu;
1417
1418
1419 ret = rndis_filter_query_device_mac(rndis_device, net_device);
1420 if (ret != 0)
1421 goto err_dev_remv;
1422
1423 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
1424
1425
1426 if (!net->ifalias)
1427 rndis_get_friendly_name(net, rndis_device, net_device);
1428
1429
1430 ret = rndis_netdev_set_hwcaps(rndis_device, net_device);
1431 if (ret != 0)
1432 goto err_dev_remv;
1433
1434 rndis_filter_query_device_link_status(rndis_device, net_device);
1435
1436 netdev_dbg(net, "Device MAC %pM link state %s\n",
1437 rndis_device->hw_mac_adr,
1438 rndis_device->link_state ? "down" : "up");
1439
1440 if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
1441 goto out;
1442
1443 rndis_filter_query_link_speed(rndis_device, net_device);
1444
1445
1446 memset(&rsscap, 0, rsscap_size);
1447 ret = rndis_filter_query_device(rndis_device, net_device,
1448 OID_GEN_RECEIVE_SCALE_CAPABILITIES,
1449 &rsscap, &rsscap_size);
1450 if (ret || rsscap.num_recv_que < 2)
1451 goto out;
1452
1453
1454 num_possible_rss_qs = min_t(u32, num_online_cpus(),
1455 rsscap.num_recv_que);
1456
1457 net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, num_possible_rss_qs);
1458
1459
1460 net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
1461
1462 if (!netif_is_rxfh_configured(net)) {
1463 for (i = 0; i < ITAB_NUM; i++)
1464 ndc->rx_table[i] = ethtool_rxfh_indir_default(
1465 i, net_device->num_chn);
1466 }
1467
1468 atomic_set(&net_device->open_chn, 1);
1469 vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
1470
1471 for (i = 1; i < net_device->num_chn; i++) {
1472 ret = netvsc_alloc_recv_comp_ring(net_device, i);
1473 if (ret) {
1474 while (--i != 0)
1475 vfree(net_device->chan_table[i].mrc.slots);
1476 goto out;
1477 }
1478 }
1479
1480 for (i = 1; i < net_device->num_chn; i++)
1481 netif_napi_add(net, &net_device->chan_table[i].napi,
1482 netvsc_poll, NAPI_POLL_WEIGHT);
1483
1484 return net_device;
1485
1486out:
1487
1488 net_device->max_chn = 1;
1489 net_device->num_chn = 1;
1490 return net_device;
1491
1492err_dev_remv:
1493 rndis_filter_device_remove(dev, net_device);
1494 return ERR_PTR(ret);
1495}
1496
1497void rndis_filter_device_remove(struct hv_device *dev,
1498 struct netvsc_device *net_dev)
1499{
1500 struct rndis_device *rndis_dev = net_dev->extension;
1501
1502
1503 rndis_filter_halt_device(net_dev, rndis_dev);
1504
1505 netvsc_device_remove(dev);
1506}
1507
1508int rndis_filter_open(struct netvsc_device *nvdev)
1509{
1510 if (!nvdev)
1511 return -EINVAL;
1512
1513 return rndis_filter_open_device(nvdev->extension);
1514}
1515
1516int rndis_filter_close(struct netvsc_device *nvdev)
1517{
1518 if (!nvdev)
1519 return -EINVAL;
1520
1521 return rndis_filter_close_device(nvdev->extension);
1522}
1523