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9#include <linux/ethtool.h>
10#include <linux/kernel.h>
11#include <linux/sched.h>
12#include <linux/wait.h>
13#include <linux/highmem.h>
14#include <linux/slab.h>
15#include <linux/io.h>
16#include <linux/if_ether.h>
17#include <linux/netdevice.h>
18#include <linux/if_vlan.h>
19#include <linux/nls.h>
20#include <linux/vmalloc.h>
21#include <linux/rtnetlink.h>
22#include <linux/ucs2_string.h>
23
24#include "hyperv_net.h"
25#include "netvsc_trace.h"
26
27static void rndis_set_multicast(struct work_struct *w);
28
29#define RNDIS_EXT_LEN HV_HYP_PAGE_SIZE
30struct rndis_request {
31 struct list_head list_ent;
32 struct completion wait_event;
33
34 struct rndis_message response_msg;
35
36
37
38
39
40
41 u8 response_ext[RNDIS_EXT_LEN];
42
43
44 struct hv_netvsc_packet pkt;
45
46 struct rndis_message request_msg;
47
48
49
50
51 u8 request_ext[RNDIS_EXT_LEN];
52};
53
54static const u8 netvsc_hash_key[NETVSC_HASH_KEYLEN] = {
55 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
56 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
57 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
58 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
59 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa
60};
61
62static struct rndis_device *get_rndis_device(void)
63{
64 struct rndis_device *device;
65
66 device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
67 if (!device)
68 return NULL;
69
70 spin_lock_init(&device->request_lock);
71
72 INIT_LIST_HEAD(&device->req_list);
73 INIT_WORK(&device->mcast_work, rndis_set_multicast);
74
75 device->state = RNDIS_DEV_UNINITIALIZED;
76
77 return device;
78}
79
80static struct rndis_request *get_rndis_request(struct rndis_device *dev,
81 u32 msg_type,
82 u32 msg_len)
83{
84 struct rndis_request *request;
85 struct rndis_message *rndis_msg;
86 struct rndis_set_request *set;
87 unsigned long flags;
88
89 request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
90 if (!request)
91 return NULL;
92
93 init_completion(&request->wait_event);
94
95 rndis_msg = &request->request_msg;
96 rndis_msg->ndis_msg_type = msg_type;
97 rndis_msg->msg_len = msg_len;
98
99 request->pkt.q_idx = 0;
100
101
102
103
104
105
106 set = &rndis_msg->msg.set_req;
107 set->req_id = atomic_inc_return(&dev->new_req_id);
108
109
110 spin_lock_irqsave(&dev->request_lock, flags);
111 list_add_tail(&request->list_ent, &dev->req_list);
112 spin_unlock_irqrestore(&dev->request_lock, flags);
113
114 return request;
115}
116
117static void put_rndis_request(struct rndis_device *dev,
118 struct rndis_request *req)
119{
120 unsigned long flags;
121
122 spin_lock_irqsave(&dev->request_lock, flags);
123 list_del(&req->list_ent);
124 spin_unlock_irqrestore(&dev->request_lock, flags);
125
126 kfree(req);
127}
128
129static void dump_rndis_message(struct net_device *netdev,
130 const struct rndis_message *rndis_msg,
131 const void *data)
132{
133 switch (rndis_msg->ndis_msg_type) {
134 case RNDIS_MSG_PACKET:
135 if (rndis_msg->msg_len - RNDIS_HEADER_SIZE >= sizeof(struct rndis_packet)) {
136 const struct rndis_packet *pkt = data + RNDIS_HEADER_SIZE;
137 netdev_dbg(netdev, "RNDIS_MSG_PACKET (len %u, "
138 "data offset %u data len %u, # oob %u, "
139 "oob offset %u, oob len %u, pkt offset %u, "
140 "pkt len %u\n",
141 rndis_msg->msg_len,
142 pkt->data_offset,
143 pkt->data_len,
144 pkt->num_oob_data_elements,
145 pkt->oob_data_offset,
146 pkt->oob_data_len,
147 pkt->per_pkt_info_offset,
148 pkt->per_pkt_info_len);
149 }
150 break;
151
152 case RNDIS_MSG_INIT_C:
153 if (rndis_msg->msg_len - RNDIS_HEADER_SIZE >=
154 sizeof(struct rndis_initialize_complete)) {
155 const struct rndis_initialize_complete *init_complete =
156 data + RNDIS_HEADER_SIZE;
157 netdev_dbg(netdev, "RNDIS_MSG_INIT_C "
158 "(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
159 "device flags %d, max xfer size 0x%x, max pkts %u, "
160 "pkt aligned %u)\n",
161 rndis_msg->msg_len,
162 init_complete->req_id,
163 init_complete->status,
164 init_complete->major_ver,
165 init_complete->minor_ver,
166 init_complete->dev_flags,
167 init_complete->max_xfer_size,
168 init_complete->max_pkt_per_msg,
169 init_complete->pkt_alignment_factor);
170 }
171 break;
172
173 case RNDIS_MSG_QUERY_C:
174 if (rndis_msg->msg_len - RNDIS_HEADER_SIZE >=
175 sizeof(struct rndis_query_complete)) {
176 const struct rndis_query_complete *query_complete =
177 data + RNDIS_HEADER_SIZE;
178 netdev_dbg(netdev, "RNDIS_MSG_QUERY_C "
179 "(len %u, id 0x%x, status 0x%x, buf len %u, "
180 "buf offset %u)\n",
181 rndis_msg->msg_len,
182 query_complete->req_id,
183 query_complete->status,
184 query_complete->info_buflen,
185 query_complete->info_buf_offset);
186 }
187 break;
188
189 case RNDIS_MSG_SET_C:
190 if (rndis_msg->msg_len - RNDIS_HEADER_SIZE + sizeof(struct rndis_set_complete)) {
191 const struct rndis_set_complete *set_complete =
192 data + RNDIS_HEADER_SIZE;
193 netdev_dbg(netdev,
194 "RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
195 rndis_msg->msg_len,
196 set_complete->req_id,
197 set_complete->status);
198 }
199 break;
200
201 case RNDIS_MSG_INDICATE:
202 if (rndis_msg->msg_len - RNDIS_HEADER_SIZE >=
203 sizeof(struct rndis_indicate_status)) {
204 const struct rndis_indicate_status *indicate_status =
205 data + RNDIS_HEADER_SIZE;
206 netdev_dbg(netdev, "RNDIS_MSG_INDICATE "
207 "(len %u, status 0x%x, buf len %u, buf offset %u)\n",
208 rndis_msg->msg_len,
209 indicate_status->status,
210 indicate_status->status_buflen,
211 indicate_status->status_buf_offset);
212 }
213 break;
214
215 default:
216 netdev_dbg(netdev, "0x%x (len %u)\n",
217 rndis_msg->ndis_msg_type,
218 rndis_msg->msg_len);
219 break;
220 }
221}
222
223static int rndis_filter_send_request(struct rndis_device *dev,
224 struct rndis_request *req)
225{
226 struct hv_netvsc_packet *packet;
227 struct hv_page_buffer page_buf[2];
228 struct hv_page_buffer *pb = page_buf;
229 int ret;
230
231
232 packet = &req->pkt;
233
234 packet->total_data_buflen = req->request_msg.msg_len;
235 packet->page_buf_cnt = 1;
236
237 pb[0].pfn = virt_to_phys(&req->request_msg) >>
238 HV_HYP_PAGE_SHIFT;
239 pb[0].len = req->request_msg.msg_len;
240 pb[0].offset = offset_in_hvpage(&req->request_msg);
241
242
243 if (pb[0].offset + pb[0].len > HV_HYP_PAGE_SIZE) {
244 packet->page_buf_cnt++;
245 pb[0].len = HV_HYP_PAGE_SIZE -
246 pb[0].offset;
247 pb[1].pfn = virt_to_phys((void *)&req->request_msg
248 + pb[0].len) >> HV_HYP_PAGE_SHIFT;
249 pb[1].offset = 0;
250 pb[1].len = req->request_msg.msg_len -
251 pb[0].len;
252 }
253
254 trace_rndis_send(dev->ndev, 0, &req->request_msg);
255
256 rcu_read_lock_bh();
257 ret = netvsc_send(dev->ndev, packet, NULL, pb, NULL, false);
258 rcu_read_unlock_bh();
259
260 return ret;
261}
262
263static void rndis_set_link_state(struct rndis_device *rdev,
264 struct rndis_request *request)
265{
266 u32 link_status;
267 struct rndis_query_complete *query_complete;
268 u32 msg_len = request->response_msg.msg_len;
269
270
271 if (msg_len - RNDIS_HEADER_SIZE < sizeof(struct rndis_query_complete))
272 return;
273
274 query_complete = &request->response_msg.msg.query_complete;
275
276 if (query_complete->status == RNDIS_STATUS_SUCCESS &&
277 query_complete->info_buflen >= sizeof(u32) &&
278 query_complete->info_buf_offset >= sizeof(*query_complete) &&
279 msg_len - RNDIS_HEADER_SIZE >= query_complete->info_buf_offset &&
280 msg_len - RNDIS_HEADER_SIZE - query_complete->info_buf_offset
281 >= query_complete->info_buflen) {
282 memcpy(&link_status, (void *)((unsigned long)query_complete +
283 query_complete->info_buf_offset), sizeof(u32));
284 rdev->link_state = link_status != 0;
285 }
286}
287
288static void rndis_filter_receive_response(struct net_device *ndev,
289 struct netvsc_device *nvdev,
290 struct rndis_message *resp,
291 void *data)
292{
293 u32 *req_id = &resp->msg.init_complete.req_id;
294 struct rndis_device *dev = nvdev->extension;
295 struct rndis_request *request = NULL;
296 bool found = false;
297 unsigned long flags;
298
299
300
301
302 if (dev->state == RNDIS_DEV_UNINITIALIZED) {
303 netdev_err(ndev,
304 "got rndis message uninitialized\n");
305 return;
306 }
307
308
309
310
311
312 if (resp->msg_len - RNDIS_HEADER_SIZE < sizeof(u32)) {
313 netdev_err(ndev, "rndis msg_len too small: %u\n",
314 resp->msg_len);
315 return;
316 }
317
318
319 *req_id = *(u32 *)(data + RNDIS_HEADER_SIZE);
320
321 spin_lock_irqsave(&dev->request_lock, flags);
322 list_for_each_entry(request, &dev->req_list, list_ent) {
323
324
325
326
327 if (request->request_msg.msg.init_req.req_id == *req_id) {
328 found = true;
329 break;
330 }
331 }
332 spin_unlock_irqrestore(&dev->request_lock, flags);
333
334 if (found) {
335 if (resp->msg_len <=
336 sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
337 memcpy(&request->response_msg, resp, RNDIS_HEADER_SIZE + sizeof(*req_id));
338 memcpy((void *)&request->response_msg + RNDIS_HEADER_SIZE + sizeof(*req_id),
339 data + RNDIS_HEADER_SIZE + sizeof(*req_id),
340 resp->msg_len - RNDIS_HEADER_SIZE - sizeof(*req_id));
341 if (request->request_msg.ndis_msg_type ==
342 RNDIS_MSG_QUERY && request->request_msg.msg.
343 query_req.oid == RNDIS_OID_GEN_MEDIA_CONNECT_STATUS)
344 rndis_set_link_state(dev, request);
345 } else {
346 netdev_err(ndev,
347 "rndis response buffer overflow "
348 "detected (size %u max %zu)\n",
349 resp->msg_len,
350 sizeof(struct rndis_message));
351
352 if (resp->ndis_msg_type ==
353 RNDIS_MSG_RESET_C) {
354
355 request->response_msg.msg.reset_complete.
356 status = RNDIS_STATUS_BUFFER_OVERFLOW;
357 } else {
358 request->response_msg.msg.
359 init_complete.status =
360 RNDIS_STATUS_BUFFER_OVERFLOW;
361 }
362 }
363
364 netvsc_dma_unmap(((struct net_device_context *)
365 netdev_priv(ndev))->device_ctx, &request->pkt);
366 complete(&request->wait_event);
367 } else {
368 netdev_err(ndev,
369 "no rndis request found for this response "
370 "(id 0x%x res type 0x%x)\n",
371 *req_id,
372 resp->ndis_msg_type);
373 }
374}
375
376
377
378
379
380static inline void *rndis_get_ppi(struct net_device *ndev,
381 struct rndis_packet *rpkt,
382 u32 rpkt_len, u32 type, u8 internal,
383 u32 ppi_size, void *data)
384{
385 struct rndis_per_packet_info *ppi;
386 int len;
387
388 if (rpkt->per_pkt_info_offset == 0)
389 return NULL;
390
391
392 if (rpkt->per_pkt_info_offset < sizeof(struct rndis_packet) ||
393 rpkt->per_pkt_info_offset > rpkt_len) {
394 netdev_err(ndev, "Invalid per_pkt_info_offset: %u\n",
395 rpkt->per_pkt_info_offset);
396 return NULL;
397 }
398
399 if (rpkt->per_pkt_info_len < sizeof(*ppi) ||
400 rpkt->per_pkt_info_len > rpkt_len - rpkt->per_pkt_info_offset) {
401 netdev_err(ndev, "Invalid per_pkt_info_len: %u\n",
402 rpkt->per_pkt_info_len);
403 return NULL;
404 }
405
406 ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
407 rpkt->per_pkt_info_offset);
408
409 memcpy(ppi, data + RNDIS_HEADER_SIZE + rpkt->per_pkt_info_offset, rpkt->per_pkt_info_len);
410 len = rpkt->per_pkt_info_len;
411
412 while (len > 0) {
413
414 if (ppi->size > len) {
415 netdev_err(ndev, "Invalid ppi size: %u\n", ppi->size);
416 continue;
417 }
418
419 if (ppi->ppi_offset >= ppi->size) {
420 netdev_err(ndev, "Invalid ppi_offset: %u\n", ppi->ppi_offset);
421 continue;
422 }
423
424 if (ppi->type == type && ppi->internal == internal) {
425
426 if (ppi->size - ppi->ppi_offset < ppi_size) {
427 netdev_err(ndev, "Invalid ppi: size %u ppi_offset %u\n",
428 ppi->size, ppi->ppi_offset);
429 continue;
430 }
431 return (void *)((ulong)ppi + ppi->ppi_offset);
432 }
433 len -= ppi->size;
434 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
435 }
436
437 return NULL;
438}
439
440static inline
441void rsc_add_data(struct netvsc_channel *nvchan,
442 const struct ndis_pkt_8021q_info *vlan,
443 const struct ndis_tcp_ip_checksum_info *csum_info,
444 const u32 *hash_info,
445 void *data, u32 len)
446{
447 u32 cnt = nvchan->rsc.cnt;
448
449 if (cnt) {
450 nvchan->rsc.pktlen += len;
451 } else {
452
453
454
455
456 if (vlan != NULL) {
457 memcpy(&nvchan->rsc.vlan, vlan, sizeof(*vlan));
458 nvchan->rsc.ppi_flags |= NVSC_RSC_VLAN;
459 } else {
460 nvchan->rsc.ppi_flags &= ~NVSC_RSC_VLAN;
461 }
462 if (csum_info != NULL) {
463 memcpy(&nvchan->rsc.csum_info, csum_info, sizeof(*csum_info));
464 nvchan->rsc.ppi_flags |= NVSC_RSC_CSUM_INFO;
465 } else {
466 nvchan->rsc.ppi_flags &= ~NVSC_RSC_CSUM_INFO;
467 }
468 nvchan->rsc.pktlen = len;
469 if (hash_info != NULL) {
470 nvchan->rsc.hash_info = *hash_info;
471 nvchan->rsc.ppi_flags |= NVSC_RSC_HASH_INFO;
472 } else {
473 nvchan->rsc.ppi_flags &= ~NVSC_RSC_HASH_INFO;
474 }
475 }
476
477 nvchan->rsc.data[cnt] = data;
478 nvchan->rsc.len[cnt] = len;
479 nvchan->rsc.cnt++;
480}
481
482static int rndis_filter_receive_data(struct net_device *ndev,
483 struct netvsc_device *nvdev,
484 struct netvsc_channel *nvchan,
485 struct rndis_message *msg,
486 void *data, u32 data_buflen)
487{
488 struct rndis_packet *rndis_pkt = &msg->msg.pkt;
489 const struct ndis_tcp_ip_checksum_info *csum_info;
490 const struct ndis_pkt_8021q_info *vlan;
491 const struct rndis_pktinfo_id *pktinfo_id;
492 const u32 *hash_info;
493 u32 data_offset, rpkt_len;
494 bool rsc_more = false;
495 int ret;
496
497
498 if (data_buflen < RNDIS_HEADER_SIZE + sizeof(struct rndis_packet)) {
499 netdev_err(ndev, "invalid rndis pkt, data_buflen too small: %u\n",
500 data_buflen);
501 return NVSP_STAT_FAIL;
502 }
503
504
505 memcpy(rndis_pkt, data + RNDIS_HEADER_SIZE, sizeof(*rndis_pkt));
506
507
508 if (rndis_pkt->data_offset >= data_buflen - RNDIS_HEADER_SIZE) {
509 netdev_err(ndev, "invalid rndis packet offset: %u\n",
510 rndis_pkt->data_offset);
511 return NVSP_STAT_FAIL;
512 }
513
514
515 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
516
517 rpkt_len = data_buflen - RNDIS_HEADER_SIZE;
518 data_buflen -= data_offset;
519
520
521
522
523
524 if (unlikely(data_buflen < rndis_pkt->data_len)) {
525 netdev_err(ndev, "rndis message buffer "
526 "overflow detected (got %u, min %u)"
527 "...dropping this message!\n",
528 data_buflen, rndis_pkt->data_len);
529 return NVSP_STAT_FAIL;
530 }
531
532 vlan = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, IEEE_8021Q_INFO, 0, sizeof(*vlan),
533 data);
534
535 csum_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, TCPIP_CHKSUM_PKTINFO, 0,
536 sizeof(*csum_info), data);
537
538 hash_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, NBL_HASH_VALUE, 0,
539 sizeof(*hash_info), data);
540
541 pktinfo_id = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, RNDIS_PKTINFO_ID, 1,
542 sizeof(*pktinfo_id), data);
543
544
545 if (pktinfo_id && (pktinfo_id->flag & RNDIS_PKTINFO_SUBALLOC)) {
546 if (pktinfo_id->flag & RNDIS_PKTINFO_1ST_FRAG)
547 nvchan->rsc.cnt = 0;
548 else if (nvchan->rsc.cnt == 0)
549 goto drop;
550
551 rsc_more = true;
552
553 if (pktinfo_id->flag & RNDIS_PKTINFO_LAST_FRAG)
554 rsc_more = false;
555
556 if (rsc_more && nvchan->rsc.is_last)
557 goto drop;
558 } else {
559 nvchan->rsc.cnt = 0;
560 }
561
562 if (unlikely(nvchan->rsc.cnt >= NVSP_RSC_MAX))
563 goto drop;
564
565
566
567
568
569
570 rsc_add_data(nvchan, vlan, csum_info, hash_info,
571 data + data_offset, rndis_pkt->data_len);
572
573 if (rsc_more)
574 return NVSP_STAT_SUCCESS;
575
576 ret = netvsc_recv_callback(ndev, nvdev, nvchan);
577 nvchan->rsc.cnt = 0;
578
579 return ret;
580
581drop:
582 return NVSP_STAT_FAIL;
583}
584
585int rndis_filter_receive(struct net_device *ndev,
586 struct netvsc_device *net_dev,
587 struct netvsc_channel *nvchan,
588 void *data, u32 buflen)
589{
590 struct net_device_context *net_device_ctx = netdev_priv(ndev);
591 struct rndis_message *rndis_msg = nvchan->recv_buf;
592
593 if (buflen < RNDIS_HEADER_SIZE) {
594 netdev_err(ndev, "Invalid rndis_msg (buflen: %u)\n", buflen);
595 return NVSP_STAT_FAIL;
596 }
597
598
599 memcpy(rndis_msg, data, RNDIS_HEADER_SIZE);
600
601
602 if (rndis_msg->msg_len < RNDIS_HEADER_SIZE ||
603 buflen < rndis_msg->msg_len) {
604 netdev_err(ndev, "Invalid rndis_msg (buflen: %u, msg_len: %u)\n",
605 buflen, rndis_msg->msg_len);
606 return NVSP_STAT_FAIL;
607 }
608
609 if (netif_msg_rx_status(net_device_ctx))
610 dump_rndis_message(ndev, rndis_msg, data);
611
612 switch (rndis_msg->ndis_msg_type) {
613 case RNDIS_MSG_PACKET:
614 return rndis_filter_receive_data(ndev, net_dev, nvchan,
615 rndis_msg, data, buflen);
616 case RNDIS_MSG_INIT_C:
617 case RNDIS_MSG_QUERY_C:
618 case RNDIS_MSG_SET_C:
619
620 rndis_filter_receive_response(ndev, net_dev, rndis_msg, data);
621 break;
622
623 case RNDIS_MSG_INDICATE:
624
625 netvsc_linkstatus_callback(ndev, rndis_msg, data, buflen);
626 break;
627 default:
628 netdev_err(ndev,
629 "unhandled rndis message (type %u len %u)\n",
630 rndis_msg->ndis_msg_type,
631 rndis_msg->msg_len);
632 return NVSP_STAT_FAIL;
633 }
634
635 return NVSP_STAT_SUCCESS;
636}
637
638static int rndis_filter_query_device(struct rndis_device *dev,
639 struct netvsc_device *nvdev,
640 u32 oid, void *result, u32 *result_size)
641{
642 struct rndis_request *request;
643 u32 inresult_size = *result_size;
644 struct rndis_query_request *query;
645 struct rndis_query_complete *query_complete;
646 u32 msg_len;
647 int ret = 0;
648
649 if (!result)
650 return -EINVAL;
651
652 *result_size = 0;
653 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
654 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
655 if (!request) {
656 ret = -ENOMEM;
657 goto cleanup;
658 }
659
660
661 query = &request->request_msg.msg.query_req;
662 query->oid = oid;
663 query->info_buf_offset = sizeof(struct rndis_query_request);
664 query->info_buflen = 0;
665 query->dev_vc_handle = 0;
666
667 if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) {
668 struct ndis_offload *hwcaps;
669 u32 nvsp_version = nvdev->nvsp_version;
670 u8 ndis_rev;
671 size_t size;
672
673 if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) {
674 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
675 size = NDIS_OFFLOAD_SIZE;
676 } else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) {
677 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2;
678 size = NDIS_OFFLOAD_SIZE_6_1;
679 } else {
680 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1;
681 size = NDIS_OFFLOAD_SIZE_6_0;
682 }
683
684 request->request_msg.msg_len += size;
685 query->info_buflen = size;
686 hwcaps = (struct ndis_offload *)
687 ((unsigned long)query + query->info_buf_offset);
688
689 hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD;
690 hwcaps->header.revision = ndis_rev;
691 hwcaps->header.size = size;
692
693 } else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
694 struct ndis_recv_scale_cap *cap;
695
696 request->request_msg.msg_len +=
697 sizeof(struct ndis_recv_scale_cap);
698 query->info_buflen = sizeof(struct ndis_recv_scale_cap);
699 cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
700 query->info_buf_offset);
701 cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
702 cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
703 cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
704 }
705
706 ret = rndis_filter_send_request(dev, request);
707 if (ret != 0)
708 goto cleanup;
709
710 wait_for_completion(&request->wait_event);
711
712
713 query_complete = &request->response_msg.msg.query_complete;
714 msg_len = request->response_msg.msg_len;
715
716
717 if (msg_len - RNDIS_HEADER_SIZE < sizeof(struct rndis_query_complete)) {
718 ret = -1;
719 goto cleanup;
720 }
721
722 if (query_complete->info_buflen > inresult_size ||
723 query_complete->info_buf_offset < sizeof(*query_complete) ||
724 msg_len - RNDIS_HEADER_SIZE < query_complete->info_buf_offset ||
725 msg_len - RNDIS_HEADER_SIZE - query_complete->info_buf_offset
726 < query_complete->info_buflen) {
727 ret = -1;
728 goto cleanup;
729 }
730
731 memcpy(result,
732 (void *)((unsigned long)query_complete +
733 query_complete->info_buf_offset),
734 query_complete->info_buflen);
735
736 *result_size = query_complete->info_buflen;
737
738cleanup:
739 if (request)
740 put_rndis_request(dev, request);
741
742 return ret;
743}
744
745
746static int
747rndis_query_hwcaps(struct rndis_device *dev, struct netvsc_device *net_device,
748 struct ndis_offload *caps)
749{
750 u32 caps_len = sizeof(*caps);
751 int ret;
752
753 memset(caps, 0, sizeof(*caps));
754
755 ret = rndis_filter_query_device(dev, net_device,
756 OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
757 caps, &caps_len);
758 if (ret)
759 return ret;
760
761 if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) {
762 netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n",
763 caps->header.type);
764 return -EINVAL;
765 }
766
767 if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) {
768 netdev_warn(dev->ndev, "invalid NDIS objrev %x\n",
769 caps->header.revision);
770 return -EINVAL;
771 }
772
773 if (caps->header.size > caps_len ||
774 caps->header.size < NDIS_OFFLOAD_SIZE_6_0) {
775 netdev_warn(dev->ndev,
776 "invalid NDIS objsize %u, data size %u\n",
777 caps->header.size, caps_len);
778 return -EINVAL;
779 }
780
781 return 0;
782}
783
784static int rndis_filter_query_device_mac(struct rndis_device *dev,
785 struct netvsc_device *net_device)
786{
787 u32 size = ETH_ALEN;
788
789 return rndis_filter_query_device(dev, net_device,
790 RNDIS_OID_802_3_PERMANENT_ADDRESS,
791 dev->hw_mac_adr, &size);
792}
793
794#define NWADR_STR "NetworkAddress"
795#define NWADR_STRLEN 14
796
797int rndis_filter_set_device_mac(struct netvsc_device *nvdev,
798 const char *mac)
799{
800 struct rndis_device *rdev = nvdev->extension;
801 struct rndis_request *request;
802 struct rndis_set_request *set;
803 struct rndis_config_parameter_info *cpi;
804 wchar_t *cfg_nwadr, *cfg_mac;
805 struct rndis_set_complete *set_complete;
806 char macstr[2*ETH_ALEN+1];
807 u32 extlen = sizeof(struct rndis_config_parameter_info) +
808 2*NWADR_STRLEN + 4*ETH_ALEN;
809 int ret;
810
811 request = get_rndis_request(rdev, RNDIS_MSG_SET,
812 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
813 if (!request)
814 return -ENOMEM;
815
816 set = &request->request_msg.msg.set_req;
817 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
818 set->info_buflen = extlen;
819 set->info_buf_offset = sizeof(struct rndis_set_request);
820 set->dev_vc_handle = 0;
821
822 cpi = (struct rndis_config_parameter_info *)((ulong)set +
823 set->info_buf_offset);
824 cpi->parameter_name_offset =
825 sizeof(struct rndis_config_parameter_info);
826
827 cpi->parameter_name_length = 2*NWADR_STRLEN;
828 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
829 cpi->parameter_value_offset =
830 cpi->parameter_name_offset + cpi->parameter_name_length;
831
832 cpi->parameter_value_length = 4*ETH_ALEN;
833
834 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
835 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
836 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
837 cfg_nwadr, NWADR_STRLEN);
838 if (ret < 0)
839 goto cleanup;
840 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
841 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
842 cfg_mac, 2*ETH_ALEN);
843 if (ret < 0)
844 goto cleanup;
845
846 ret = rndis_filter_send_request(rdev, request);
847 if (ret != 0)
848 goto cleanup;
849
850 wait_for_completion(&request->wait_event);
851
852 set_complete = &request->response_msg.msg.set_complete;
853 if (set_complete->status != RNDIS_STATUS_SUCCESS)
854 ret = -EIO;
855
856cleanup:
857 put_rndis_request(rdev, request);
858 return ret;
859}
860
861int
862rndis_filter_set_offload_params(struct net_device *ndev,
863 struct netvsc_device *nvdev,
864 struct ndis_offload_params *req_offloads)
865{
866 struct rndis_device *rdev = nvdev->extension;
867 struct rndis_request *request;
868 struct rndis_set_request *set;
869 struct ndis_offload_params *offload_params;
870 struct rndis_set_complete *set_complete;
871 u32 extlen = sizeof(struct ndis_offload_params);
872 int ret;
873 u32 vsp_version = nvdev->nvsp_version;
874
875 if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
876 extlen = VERSION_4_OFFLOAD_SIZE;
877
878
879
880 req_offloads->udp_ip_v4_csum = 0;
881 req_offloads->udp_ip_v6_csum = 0;
882 }
883
884 request = get_rndis_request(rdev, RNDIS_MSG_SET,
885 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
886 if (!request)
887 return -ENOMEM;
888
889 set = &request->request_msg.msg.set_req;
890 set->oid = OID_TCP_OFFLOAD_PARAMETERS;
891 set->info_buflen = extlen;
892 set->info_buf_offset = sizeof(struct rndis_set_request);
893 set->dev_vc_handle = 0;
894
895 offload_params = (struct ndis_offload_params *)((ulong)set +
896 set->info_buf_offset);
897 *offload_params = *req_offloads;
898 offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
899 offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
900 offload_params->header.size = extlen;
901
902 ret = rndis_filter_send_request(rdev, request);
903 if (ret != 0)
904 goto cleanup;
905
906 wait_for_completion(&request->wait_event);
907 set_complete = &request->response_msg.msg.set_complete;
908 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
909 netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
910 set_complete->status);
911 ret = -EINVAL;
912 }
913
914cleanup:
915 put_rndis_request(rdev, request);
916 return ret;
917}
918
919static int rndis_set_rss_param_msg(struct rndis_device *rdev,
920 const u8 *rss_key, u16 flag)
921{
922 struct net_device *ndev = rdev->ndev;
923 struct net_device_context *ndc = netdev_priv(ndev);
924 struct rndis_request *request;
925 struct rndis_set_request *set;
926 struct rndis_set_complete *set_complete;
927 u32 extlen = sizeof(struct ndis_recv_scale_param) +
928 4 * ITAB_NUM + NETVSC_HASH_KEYLEN;
929 struct ndis_recv_scale_param *rssp;
930 u32 *itab;
931 u8 *keyp;
932 int i, ret;
933
934 request = get_rndis_request(
935 rdev, RNDIS_MSG_SET,
936 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
937 if (!request)
938 return -ENOMEM;
939
940 set = &request->request_msg.msg.set_req;
941 set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
942 set->info_buflen = extlen;
943 set->info_buf_offset = sizeof(struct rndis_set_request);
944 set->dev_vc_handle = 0;
945
946 rssp = (struct ndis_recv_scale_param *)(set + 1);
947 rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
948 rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
949 rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
950 rssp->flag = flag;
951 rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
952 NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
953 NDIS_HASH_TCP_IPV6;
954 rssp->indirect_tabsize = 4*ITAB_NUM;
955 rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
956 rssp->hashkey_size = NETVSC_HASH_KEYLEN;
957 rssp->hashkey_offset = rssp->indirect_taboffset +
958 rssp->indirect_tabsize;
959
960
961 itab = (u32 *)(rssp + 1);
962 for (i = 0; i < ITAB_NUM; i++)
963 itab[i] = ndc->rx_table[i];
964
965
966 keyp = (u8 *)((unsigned long)rssp + rssp->hashkey_offset);
967 memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
968
969 ret = rndis_filter_send_request(rdev, request);
970 if (ret != 0)
971 goto cleanup;
972
973 wait_for_completion(&request->wait_event);
974 set_complete = &request->response_msg.msg.set_complete;
975 if (set_complete->status == RNDIS_STATUS_SUCCESS) {
976 if (!(flag & NDIS_RSS_PARAM_FLAG_DISABLE_RSS) &&
977 !(flag & NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED))
978 memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
979
980 } else {
981 netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
982 set_complete->status);
983 ret = -EINVAL;
984 }
985
986cleanup:
987 put_rndis_request(rdev, request);
988 return ret;
989}
990
991int rndis_filter_set_rss_param(struct rndis_device *rdev,
992 const u8 *rss_key)
993{
994
995 rndis_set_rss_param_msg(rdev, rss_key,
996 NDIS_RSS_PARAM_FLAG_DISABLE_RSS);
997
998 return rndis_set_rss_param_msg(rdev, rss_key, 0);
999}
1000
1001static int rndis_filter_query_device_link_status(struct rndis_device *dev,
1002 struct netvsc_device *net_device)
1003{
1004 u32 size = sizeof(u32);
1005 u32 link_status;
1006
1007 return rndis_filter_query_device(dev, net_device,
1008 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
1009 &link_status, &size);
1010}
1011
1012static int rndis_filter_query_link_speed(struct rndis_device *dev,
1013 struct netvsc_device *net_device)
1014{
1015 u32 size = sizeof(u32);
1016 u32 link_speed;
1017 struct net_device_context *ndc;
1018 int ret;
1019
1020 ret = rndis_filter_query_device(dev, net_device,
1021 RNDIS_OID_GEN_LINK_SPEED,
1022 &link_speed, &size);
1023
1024 if (!ret) {
1025 ndc = netdev_priv(dev->ndev);
1026
1027
1028
1029
1030 ndc->speed = link_speed / 10000;
1031 }
1032
1033 return ret;
1034}
1035
1036static int rndis_filter_set_packet_filter(struct rndis_device *dev,
1037 u32 new_filter)
1038{
1039 struct rndis_request *request;
1040 struct rndis_set_request *set;
1041 int ret;
1042
1043 if (dev->filter == new_filter)
1044 return 0;
1045
1046 request = get_rndis_request(dev, RNDIS_MSG_SET,
1047 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
1048 sizeof(u32));
1049 if (!request)
1050 return -ENOMEM;
1051
1052
1053 set = &request->request_msg.msg.set_req;
1054 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
1055 set->info_buflen = sizeof(u32);
1056 set->info_buf_offset = offsetof(typeof(*set), info_buf);
1057 memcpy(set->info_buf, &new_filter, sizeof(u32));
1058
1059 ret = rndis_filter_send_request(dev, request);
1060 if (ret == 0) {
1061 wait_for_completion(&request->wait_event);
1062 dev->filter = new_filter;
1063 }
1064
1065 put_rndis_request(dev, request);
1066
1067 return ret;
1068}
1069
1070static void rndis_set_multicast(struct work_struct *w)
1071{
1072 struct rndis_device *rdev
1073 = container_of(w, struct rndis_device, mcast_work);
1074 u32 filter = NDIS_PACKET_TYPE_DIRECTED;
1075 unsigned int flags = rdev->ndev->flags;
1076
1077 if (flags & IFF_PROMISC) {
1078 filter = NDIS_PACKET_TYPE_PROMISCUOUS;
1079 } else {
1080 if (!netdev_mc_empty(rdev->ndev) || (flags & IFF_ALLMULTI))
1081 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
1082 if (flags & IFF_BROADCAST)
1083 filter |= NDIS_PACKET_TYPE_BROADCAST;
1084 }
1085
1086 rndis_filter_set_packet_filter(rdev, filter);
1087}
1088
1089void rndis_filter_update(struct netvsc_device *nvdev)
1090{
1091 struct rndis_device *rdev = nvdev->extension;
1092
1093 schedule_work(&rdev->mcast_work);
1094}
1095
1096static int rndis_filter_init_device(struct rndis_device *dev,
1097 struct netvsc_device *nvdev)
1098{
1099 struct rndis_request *request;
1100 struct rndis_initialize_request *init;
1101 struct rndis_initialize_complete *init_complete;
1102 u32 status;
1103 int ret;
1104
1105 request = get_rndis_request(dev, RNDIS_MSG_INIT,
1106 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
1107 if (!request) {
1108 ret = -ENOMEM;
1109 goto cleanup;
1110 }
1111
1112
1113 init = &request->request_msg.msg.init_req;
1114 init->major_ver = RNDIS_MAJOR_VERSION;
1115 init->minor_ver = RNDIS_MINOR_VERSION;
1116 init->max_xfer_size = 0x4000;
1117
1118 dev->state = RNDIS_DEV_INITIALIZING;
1119
1120 ret = rndis_filter_send_request(dev, request);
1121 if (ret != 0) {
1122 dev->state = RNDIS_DEV_UNINITIALIZED;
1123 goto cleanup;
1124 }
1125
1126 wait_for_completion(&request->wait_event);
1127
1128 init_complete = &request->response_msg.msg.init_complete;
1129 status = init_complete->status;
1130 if (status == RNDIS_STATUS_SUCCESS) {
1131 dev->state = RNDIS_DEV_INITIALIZED;
1132 nvdev->max_pkt = init_complete->max_pkt_per_msg;
1133 nvdev->pkt_align = 1 << init_complete->pkt_alignment_factor;
1134 ret = 0;
1135 } else {
1136 dev->state = RNDIS_DEV_UNINITIALIZED;
1137 ret = -EINVAL;
1138 }
1139
1140cleanup:
1141 if (request)
1142 put_rndis_request(dev, request);
1143
1144 return ret;
1145}
1146
1147static bool netvsc_device_idle(const struct netvsc_device *nvdev)
1148{
1149 int i;
1150
1151 for (i = 0; i < nvdev->num_chn; i++) {
1152 const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
1153
1154 if (nvchan->mrc.first != nvchan->mrc.next)
1155 return false;
1156
1157 if (atomic_read(&nvchan->queue_sends) > 0)
1158 return false;
1159 }
1160
1161 return true;
1162}
1163
1164static void rndis_filter_halt_device(struct netvsc_device *nvdev,
1165 struct rndis_device *dev)
1166{
1167 struct rndis_request *request;
1168 struct rndis_halt_request *halt;
1169
1170
1171 request = get_rndis_request(dev, RNDIS_MSG_HALT,
1172 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
1173 if (!request)
1174 goto cleanup;
1175
1176
1177 halt = &request->request_msg.msg.halt_req;
1178 halt->req_id = atomic_inc_return(&dev->new_req_id);
1179
1180
1181 rndis_filter_send_request(dev, request);
1182
1183 dev->state = RNDIS_DEV_UNINITIALIZED;
1184
1185cleanup:
1186 nvdev->destroy = true;
1187
1188
1189 wmb();
1190
1191
1192 wait_event(nvdev->wait_drain, netvsc_device_idle(nvdev));
1193
1194 if (request)
1195 put_rndis_request(dev, request);
1196}
1197
1198static int rndis_filter_open_device(struct rndis_device *dev)
1199{
1200 int ret;
1201
1202 if (dev->state != RNDIS_DEV_INITIALIZED)
1203 return 0;
1204
1205 ret = rndis_filter_set_packet_filter(dev,
1206 NDIS_PACKET_TYPE_BROADCAST |
1207 NDIS_PACKET_TYPE_ALL_MULTICAST |
1208 NDIS_PACKET_TYPE_DIRECTED);
1209 if (ret == 0)
1210 dev->state = RNDIS_DEV_DATAINITIALIZED;
1211
1212 return ret;
1213}
1214
1215static int rndis_filter_close_device(struct rndis_device *dev)
1216{
1217 int ret;
1218
1219 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
1220 return 0;
1221
1222
1223 cancel_work_sync(&dev->mcast_work);
1224
1225 ret = rndis_filter_set_packet_filter(dev, 0);
1226 if (ret == -ENODEV)
1227 ret = 0;
1228
1229 if (ret == 0)
1230 dev->state = RNDIS_DEV_INITIALIZED;
1231
1232 return ret;
1233}
1234
1235static void netvsc_sc_open(struct vmbus_channel *new_sc)
1236{
1237 struct net_device *ndev =
1238 hv_get_drvdata(new_sc->primary_channel->device_obj);
1239 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1240 struct netvsc_device *nvscdev;
1241 u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
1242 struct netvsc_channel *nvchan;
1243 int ret;
1244
1245
1246
1247
1248 nvscdev = rcu_dereference_raw(ndev_ctx->nvdev);
1249 if (!nvscdev || chn_index >= nvscdev->num_chn)
1250 return;
1251
1252 nvchan = nvscdev->chan_table + chn_index;
1253
1254
1255
1256
1257 set_channel_read_mode(new_sc, HV_CALL_ISR);
1258
1259
1260 nvchan->channel = new_sc;
1261
1262 new_sc->next_request_id_callback = vmbus_next_request_id;
1263 new_sc->request_addr_callback = vmbus_request_addr;
1264 new_sc->rqstor_size = netvsc_rqstor_size(netvsc_ring_bytes);
1265 new_sc->max_pkt_size = NETVSC_MAX_PKT_SIZE;
1266
1267 ret = vmbus_open(new_sc, netvsc_ring_bytes,
1268 netvsc_ring_bytes, NULL, 0,
1269 netvsc_channel_cb, nvchan);
1270 if (ret == 0)
1271 napi_enable(&nvchan->napi);
1272 else
1273 netdev_notice(ndev, "sub channel open failed: %d\n", ret);
1274
1275 if (atomic_inc_return(&nvscdev->open_chn) == nvscdev->num_chn)
1276 wake_up(&nvscdev->subchan_open);
1277}
1278
1279
1280
1281
1282
1283int rndis_set_subchannel(struct net_device *ndev,
1284 struct netvsc_device *nvdev,
1285 struct netvsc_device_info *dev_info)
1286{
1287 struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
1288 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1289 struct hv_device *hv_dev = ndev_ctx->device_ctx;
1290 struct rndis_device *rdev = nvdev->extension;
1291 int i, ret;
1292
1293 ASSERT_RTNL();
1294
1295 memset(init_packet, 0, sizeof(struct nvsp_message));
1296 init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
1297 init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
1298 init_packet->msg.v5_msg.subchn_req.num_subchannels =
1299 nvdev->num_chn - 1;
1300 trace_nvsp_send(ndev, init_packet);
1301
1302 ret = vmbus_sendpacket(hv_dev->channel, init_packet,
1303 sizeof(struct nvsp_message),
1304 (unsigned long)init_packet,
1305 VM_PKT_DATA_INBAND,
1306 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
1307 if (ret) {
1308 netdev_err(ndev, "sub channel allocate send failed: %d\n", ret);
1309 return ret;
1310 }
1311
1312 wait_for_completion(&nvdev->channel_init_wait);
1313 if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
1314 netdev_err(ndev, "sub channel request failed\n");
1315 return -EIO;
1316 }
1317
1318
1319 if (init_packet->msg.v5_msg.subchn_comp.num_subchannels > nvdev->num_chn - 1) {
1320 netdev_err(ndev, "invalid number of allocated sub channel\n");
1321 return -EINVAL;
1322 }
1323 nvdev->num_chn = 1 +
1324 init_packet->msg.v5_msg.subchn_comp.num_subchannels;
1325
1326
1327 wait_event(nvdev->subchan_open,
1328 atomic_read(&nvdev->open_chn) == nvdev->num_chn);
1329
1330 for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
1331 ndev_ctx->tx_table[i] = i % nvdev->num_chn;
1332
1333
1334 if (dev_info)
1335 rndis_filter_set_rss_param(rdev, dev_info->rss_key);
1336 else
1337 rndis_filter_set_rss_param(rdev, netvsc_hash_key);
1338
1339 netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
1340 netif_set_real_num_rx_queues(ndev, nvdev->num_chn);
1341
1342 return 0;
1343}
1344
1345static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
1346 struct netvsc_device *nvdev)
1347{
1348 struct net_device *net = rndis_device->ndev;
1349 struct net_device_context *net_device_ctx = netdev_priv(net);
1350 struct ndis_offload hwcaps;
1351 struct ndis_offload_params offloads;
1352 unsigned int gso_max_size = GSO_MAX_SIZE;
1353 int ret;
1354
1355
1356 ret = rndis_query_hwcaps(rndis_device, nvdev, &hwcaps);
1357 if (ret != 0)
1358 return ret;
1359
1360
1361 memset(&offloads, 0, sizeof(struct ndis_offload_params));
1362
1363
1364 offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED;
1365
1366
1367 net->hw_features &= ~NETVSC_SUPPORTED_HW_FEATURES;
1368 net_device_ctx->tx_checksum_mask = 0;
1369
1370
1371 net->hw_features |= NETIF_F_RXCSUM;
1372 net->hw_features |= NETIF_F_SG;
1373 net->hw_features |= NETIF_F_RXHASH;
1374
1375 if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
1376
1377 net->hw_features |= NETIF_F_IP_CSUM;
1378 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP;
1379
1380 offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1381
1382 if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) {
1383 offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1384 net->hw_features |= NETIF_F_TSO;
1385
1386 if (hwcaps.lsov2.ip4_maxsz < gso_max_size)
1387 gso_max_size = hwcaps.lsov2.ip4_maxsz;
1388 }
1389
1390 if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) {
1391 offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1392 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP;
1393 }
1394 }
1395
1396 if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) {
1397 net->hw_features |= NETIF_F_IPV6_CSUM;
1398
1399 offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1400 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP;
1401
1402 if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) &&
1403 (hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) {
1404 offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1405 net->hw_features |= NETIF_F_TSO6;
1406
1407 if (hwcaps.lsov2.ip6_maxsz < gso_max_size)
1408 gso_max_size = hwcaps.lsov2.ip6_maxsz;
1409 }
1410
1411 if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) {
1412 offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1413 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP;
1414 }
1415 }
1416
1417 if (hwcaps.rsc.ip4 && hwcaps.rsc.ip6) {
1418 net->hw_features |= NETIF_F_LRO;
1419
1420 if (net->features & NETIF_F_LRO) {
1421 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1422 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1423 } else {
1424 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1425 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1426 }
1427 }
1428
1429
1430
1431
1432 net->features &= ~NETVSC_SUPPORTED_HW_FEATURES | net->hw_features;
1433
1434 netif_set_gso_max_size(net, gso_max_size);
1435
1436 ret = rndis_filter_set_offload_params(net, nvdev, &offloads);
1437
1438 return ret;
1439}
1440
1441static void rndis_get_friendly_name(struct net_device *net,
1442 struct rndis_device *rndis_device,
1443 struct netvsc_device *net_device)
1444{
1445 ucs2_char_t wname[256];
1446 unsigned long len;
1447 u8 ifalias[256];
1448 u32 size;
1449
1450 size = sizeof(wname);
1451 if (rndis_filter_query_device(rndis_device, net_device,
1452 RNDIS_OID_GEN_FRIENDLY_NAME,
1453 wname, &size) != 0)
1454 return;
1455
1456 if (size == 0)
1457 return;
1458
1459
1460 len = ucs2_as_utf8(ifalias, wname, sizeof(ifalias));
1461
1462
1463 if (strcmp(ifalias, "Network Adapter") != 0)
1464 dev_set_alias(net, ifalias, len);
1465}
1466
1467struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
1468 struct netvsc_device_info *device_info)
1469{
1470 struct net_device *net = hv_get_drvdata(dev);
1471 struct net_device_context *ndc = netdev_priv(net);
1472 struct netvsc_device *net_device;
1473 struct rndis_device *rndis_device;
1474 struct ndis_recv_scale_cap rsscap;
1475 u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
1476 u32 mtu, size;
1477 u32 num_possible_rss_qs;
1478 int i, ret;
1479
1480 rndis_device = get_rndis_device();
1481 if (!rndis_device)
1482 return ERR_PTR(-ENODEV);
1483
1484
1485
1486
1487
1488 net_device = netvsc_device_add(dev, device_info);
1489 if (IS_ERR(net_device)) {
1490 kfree(rndis_device);
1491 return net_device;
1492 }
1493
1494
1495 net_device->max_chn = 1;
1496 net_device->num_chn = 1;
1497
1498 net_device->extension = rndis_device;
1499 rndis_device->ndev = net;
1500
1501
1502 ret = rndis_filter_init_device(rndis_device, net_device);
1503 if (ret != 0)
1504 goto err_dev_remv;
1505
1506
1507 size = sizeof(u32);
1508 ret = rndis_filter_query_device(rndis_device, net_device,
1509 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
1510 &mtu, &size);
1511 if (ret == 0 && size == sizeof(u32) && mtu < net->mtu)
1512 net->mtu = mtu;
1513
1514
1515 ret = rndis_filter_query_device_mac(rndis_device, net_device);
1516 if (ret != 0)
1517 goto err_dev_remv;
1518
1519 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
1520
1521
1522 if (!net->ifalias)
1523 rndis_get_friendly_name(net, rndis_device, net_device);
1524
1525
1526 ret = rndis_netdev_set_hwcaps(rndis_device, net_device);
1527 if (ret != 0)
1528 goto err_dev_remv;
1529
1530 rndis_filter_query_device_link_status(rndis_device, net_device);
1531
1532 netdev_dbg(net, "Device MAC %pM link state %s\n",
1533 rndis_device->hw_mac_adr,
1534 rndis_device->link_state ? "down" : "up");
1535
1536 if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
1537 goto out;
1538
1539 rndis_filter_query_link_speed(rndis_device, net_device);
1540
1541
1542 memset(&rsscap, 0, rsscap_size);
1543 ret = rndis_filter_query_device(rndis_device, net_device,
1544 OID_GEN_RECEIVE_SCALE_CAPABILITIES,
1545 &rsscap, &rsscap_size);
1546 if (ret || rsscap.num_recv_que < 2)
1547 goto out;
1548
1549
1550 num_possible_rss_qs = min_t(u32, num_online_cpus(),
1551 rsscap.num_recv_que);
1552
1553 net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, num_possible_rss_qs);
1554
1555
1556 net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
1557
1558 if (!netif_is_rxfh_configured(net)) {
1559 for (i = 0; i < ITAB_NUM; i++)
1560 ndc->rx_table[i] = ethtool_rxfh_indir_default(
1561 i, net_device->num_chn);
1562 }
1563
1564 atomic_set(&net_device->open_chn, 1);
1565 vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
1566
1567 for (i = 1; i < net_device->num_chn; i++) {
1568 ret = netvsc_alloc_recv_comp_ring(net_device, i);
1569 if (ret) {
1570 while (--i != 0)
1571 vfree(net_device->chan_table[i].mrc.slots);
1572 goto out;
1573 }
1574 }
1575
1576 for (i = 1; i < net_device->num_chn; i++)
1577 netif_napi_add(net, &net_device->chan_table[i].napi,
1578 netvsc_poll, NAPI_POLL_WEIGHT);
1579
1580 return net_device;
1581
1582out:
1583
1584 net_device->max_chn = 1;
1585 net_device->num_chn = 1;
1586 return net_device;
1587
1588err_dev_remv:
1589 rndis_filter_device_remove(dev, net_device);
1590 return ERR_PTR(ret);
1591}
1592
1593void rndis_filter_device_remove(struct hv_device *dev,
1594 struct netvsc_device *net_dev)
1595{
1596 struct rndis_device *rndis_dev = net_dev->extension;
1597
1598
1599 rndis_filter_halt_device(net_dev, rndis_dev);
1600
1601 netvsc_device_remove(dev);
1602}
1603
1604int rndis_filter_open(struct netvsc_device *nvdev)
1605{
1606 if (!nvdev)
1607 return -EINVAL;
1608
1609 return rndis_filter_open_device(nvdev->extension);
1610}
1611
1612int rndis_filter_close(struct netvsc_device *nvdev)
1613{
1614 if (!nvdev)
1615 return -EINVAL;
1616
1617 return rndis_filter_close_device(nvdev->extension);
1618}
1619
