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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 complete(&request->wait_event);
365 } else {
366 netdev_err(ndev,
367 "no rndis request found for this response "
368 "(id 0x%x res type 0x%x)\n",
369 *req_id,
370 resp->ndis_msg_type);
371 }
372}
373
374
375
376
377
378static inline void *rndis_get_ppi(struct net_device *ndev,
379 struct rndis_packet *rpkt,
380 u32 rpkt_len, u32 type, u8 internal,
381 u32 ppi_size, void *data)
382{
383 struct rndis_per_packet_info *ppi;
384 int len;
385
386 if (rpkt->per_pkt_info_offset == 0)
387 return NULL;
388
389
390 if (rpkt->per_pkt_info_offset < sizeof(struct rndis_packet) ||
391 rpkt->per_pkt_info_offset > rpkt_len) {
392 netdev_err(ndev, "Invalid per_pkt_info_offset: %u\n",
393 rpkt->per_pkt_info_offset);
394 return NULL;
395 }
396
397 if (rpkt->per_pkt_info_len < sizeof(*ppi) ||
398 rpkt->per_pkt_info_len > rpkt_len - rpkt->per_pkt_info_offset) {
399 netdev_err(ndev, "Invalid per_pkt_info_len: %u\n",
400 rpkt->per_pkt_info_len);
401 return NULL;
402 }
403
404 ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
405 rpkt->per_pkt_info_offset);
406
407 memcpy(ppi, data + RNDIS_HEADER_SIZE + rpkt->per_pkt_info_offset, rpkt->per_pkt_info_len);
408 len = rpkt->per_pkt_info_len;
409
410 while (len > 0) {
411
412 if (ppi->size > len) {
413 netdev_err(ndev, "Invalid ppi size: %u\n", ppi->size);
414 continue;
415 }
416
417 if (ppi->ppi_offset >= ppi->size) {
418 netdev_err(ndev, "Invalid ppi_offset: %u\n", ppi->ppi_offset);
419 continue;
420 }
421
422 if (ppi->type == type && ppi->internal == internal) {
423
424 if (ppi->size - ppi->ppi_offset < ppi_size) {
425 netdev_err(ndev, "Invalid ppi: size %u ppi_offset %u\n",
426 ppi->size, ppi->ppi_offset);
427 continue;
428 }
429 return (void *)((ulong)ppi + ppi->ppi_offset);
430 }
431 len -= ppi->size;
432 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
433 }
434
435 return NULL;
436}
437
438static inline
439void rsc_add_data(struct netvsc_channel *nvchan,
440 const struct ndis_pkt_8021q_info *vlan,
441 const struct ndis_tcp_ip_checksum_info *csum_info,
442 const u32 *hash_info,
443 void *data, u32 len)
444{
445 u32 cnt = nvchan->rsc.cnt;
446
447 if (cnt) {
448 nvchan->rsc.pktlen += len;
449 } else {
450
451
452
453
454 if (vlan != NULL) {
455 memcpy(&nvchan->rsc.vlan, vlan, sizeof(*vlan));
456 nvchan->rsc.ppi_flags |= NVSC_RSC_VLAN;
457 } else {
458 nvchan->rsc.ppi_flags &= ~NVSC_RSC_VLAN;
459 }
460 if (csum_info != NULL) {
461 memcpy(&nvchan->rsc.csum_info, csum_info, sizeof(*csum_info));
462 nvchan->rsc.ppi_flags |= NVSC_RSC_CSUM_INFO;
463 } else {
464 nvchan->rsc.ppi_flags &= ~NVSC_RSC_CSUM_INFO;
465 }
466 nvchan->rsc.pktlen = len;
467 if (hash_info != NULL) {
468 nvchan->rsc.hash_info = *hash_info;
469 nvchan->rsc.ppi_flags |= NVSC_RSC_HASH_INFO;
470 } else {
471 nvchan->rsc.ppi_flags &= ~NVSC_RSC_HASH_INFO;
472 }
473 }
474
475 nvchan->rsc.data[cnt] = data;
476 nvchan->rsc.len[cnt] = len;
477 nvchan->rsc.cnt++;
478}
479
480static int rndis_filter_receive_data(struct net_device *ndev,
481 struct netvsc_device *nvdev,
482 struct netvsc_channel *nvchan,
483 struct rndis_message *msg,
484 void *data, u32 data_buflen)
485{
486 struct rndis_packet *rndis_pkt = &msg->msg.pkt;
487 const struct ndis_tcp_ip_checksum_info *csum_info;
488 const struct ndis_pkt_8021q_info *vlan;
489 const struct rndis_pktinfo_id *pktinfo_id;
490 const u32 *hash_info;
491 u32 data_offset, rpkt_len;
492 bool rsc_more = false;
493 int ret;
494
495
496 if (data_buflen < RNDIS_HEADER_SIZE + sizeof(struct rndis_packet)) {
497 netdev_err(ndev, "invalid rndis pkt, data_buflen too small: %u\n",
498 data_buflen);
499 return NVSP_STAT_FAIL;
500 }
501
502
503 memcpy(rndis_pkt, data + RNDIS_HEADER_SIZE, sizeof(*rndis_pkt));
504
505
506 if (rndis_pkt->data_offset >= data_buflen - RNDIS_HEADER_SIZE) {
507 netdev_err(ndev, "invalid rndis packet offset: %u\n",
508 rndis_pkt->data_offset);
509 return NVSP_STAT_FAIL;
510 }
511
512
513 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
514
515 rpkt_len = data_buflen - RNDIS_HEADER_SIZE;
516 data_buflen -= data_offset;
517
518
519
520
521
522 if (unlikely(data_buflen < rndis_pkt->data_len)) {
523 netdev_err(ndev, "rndis message buffer "
524 "overflow detected (got %u, min %u)"
525 "...dropping this message!\n",
526 data_buflen, rndis_pkt->data_len);
527 return NVSP_STAT_FAIL;
528 }
529
530 vlan = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, IEEE_8021Q_INFO, 0, sizeof(*vlan),
531 data);
532
533 csum_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, TCPIP_CHKSUM_PKTINFO, 0,
534 sizeof(*csum_info), data);
535
536 hash_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, NBL_HASH_VALUE, 0,
537 sizeof(*hash_info), data);
538
539 pktinfo_id = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, RNDIS_PKTINFO_ID, 1,
540 sizeof(*pktinfo_id), data);
541
542
543 if (pktinfo_id && (pktinfo_id->flag & RNDIS_PKTINFO_SUBALLOC)) {
544 if (pktinfo_id->flag & RNDIS_PKTINFO_1ST_FRAG)
545 nvchan->rsc.cnt = 0;
546 else if (nvchan->rsc.cnt == 0)
547 goto drop;
548
549 rsc_more = true;
550
551 if (pktinfo_id->flag & RNDIS_PKTINFO_LAST_FRAG)
552 rsc_more = false;
553
554 if (rsc_more && nvchan->rsc.is_last)
555 goto drop;
556 } else {
557 nvchan->rsc.cnt = 0;
558 }
559
560 if (unlikely(nvchan->rsc.cnt >= NVSP_RSC_MAX))
561 goto drop;
562
563
564
565
566
567
568 rsc_add_data(nvchan, vlan, csum_info, hash_info,
569 data + data_offset, rndis_pkt->data_len);
570
571 if (rsc_more)
572 return NVSP_STAT_SUCCESS;
573
574 ret = netvsc_recv_callback(ndev, nvdev, nvchan);
575 nvchan->rsc.cnt = 0;
576
577 return ret;
578
579drop:
580 return NVSP_STAT_FAIL;
581}
582
583int rndis_filter_receive(struct net_device *ndev,
584 struct netvsc_device *net_dev,
585 struct netvsc_channel *nvchan,
586 void *data, u32 buflen)
587{
588 struct net_device_context *net_device_ctx = netdev_priv(ndev);
589 struct rndis_message *rndis_msg = nvchan->recv_buf;
590
591 if (buflen < RNDIS_HEADER_SIZE) {
592 netdev_err(ndev, "Invalid rndis_msg (buflen: %u)\n", buflen);
593 return NVSP_STAT_FAIL;
594 }
595
596
597 memcpy(rndis_msg, data, RNDIS_HEADER_SIZE);
598
599
600 if (rndis_msg->msg_len < RNDIS_HEADER_SIZE ||
601 buflen < rndis_msg->msg_len) {
602 netdev_err(ndev, "Invalid rndis_msg (buflen: %u, msg_len: %u)\n",
603 buflen, rndis_msg->msg_len);
604 return NVSP_STAT_FAIL;
605 }
606
607 if (netif_msg_rx_status(net_device_ctx))
608 dump_rndis_message(ndev, rndis_msg, data);
609
610 switch (rndis_msg->ndis_msg_type) {
611 case RNDIS_MSG_PACKET:
612 return rndis_filter_receive_data(ndev, net_dev, nvchan,
613 rndis_msg, data, buflen);
614 case RNDIS_MSG_INIT_C:
615 case RNDIS_MSG_QUERY_C:
616 case RNDIS_MSG_SET_C:
617
618 rndis_filter_receive_response(ndev, net_dev, rndis_msg, data);
619 break;
620
621 case RNDIS_MSG_INDICATE:
622
623 netvsc_linkstatus_callback(ndev, rndis_msg, data, buflen);
624 break;
625 default:
626 netdev_err(ndev,
627 "unhandled rndis message (type %u len %u)\n",
628 rndis_msg->ndis_msg_type,
629 rndis_msg->msg_len);
630 return NVSP_STAT_FAIL;
631 }
632
633 return NVSP_STAT_SUCCESS;
634}
635
636static int rndis_filter_query_device(struct rndis_device *dev,
637 struct netvsc_device *nvdev,
638 u32 oid, void *result, u32 *result_size)
639{
640 struct rndis_request *request;
641 u32 inresult_size = *result_size;
642 struct rndis_query_request *query;
643 struct rndis_query_complete *query_complete;
644 u32 msg_len;
645 int ret = 0;
646
647 if (!result)
648 return -EINVAL;
649
650 *result_size = 0;
651 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
652 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
653 if (!request) {
654 ret = -ENOMEM;
655 goto cleanup;
656 }
657
658
659 query = &request->request_msg.msg.query_req;
660 query->oid = oid;
661 query->info_buf_offset = sizeof(struct rndis_query_request);
662 query->info_buflen = 0;
663 query->dev_vc_handle = 0;
664
665 if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) {
666 struct ndis_offload *hwcaps;
667 u32 nvsp_version = nvdev->nvsp_version;
668 u8 ndis_rev;
669 size_t size;
670
671 if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) {
672 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
673 size = NDIS_OFFLOAD_SIZE;
674 } else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) {
675 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2;
676 size = NDIS_OFFLOAD_SIZE_6_1;
677 } else {
678 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1;
679 size = NDIS_OFFLOAD_SIZE_6_0;
680 }
681
682 request->request_msg.msg_len += size;
683 query->info_buflen = size;
684 hwcaps = (struct ndis_offload *)
685 ((unsigned long)query + query->info_buf_offset);
686
687 hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD;
688 hwcaps->header.revision = ndis_rev;
689 hwcaps->header.size = size;
690
691 } else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
692 struct ndis_recv_scale_cap *cap;
693
694 request->request_msg.msg_len +=
695 sizeof(struct ndis_recv_scale_cap);
696 query->info_buflen = sizeof(struct ndis_recv_scale_cap);
697 cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
698 query->info_buf_offset);
699 cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
700 cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
701 cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
702 }
703
704 ret = rndis_filter_send_request(dev, request);
705 if (ret != 0)
706 goto cleanup;
707
708 wait_for_completion(&request->wait_event);
709
710
711 query_complete = &request->response_msg.msg.query_complete;
712 msg_len = request->response_msg.msg_len;
713
714
715 if (msg_len - RNDIS_HEADER_SIZE < sizeof(struct rndis_query_complete)) {
716 ret = -1;
717 goto cleanup;
718 }
719
720 if (query_complete->info_buflen > inresult_size ||
721 query_complete->info_buf_offset < sizeof(*query_complete) ||
722 msg_len - RNDIS_HEADER_SIZE < query_complete->info_buf_offset ||
723 msg_len - RNDIS_HEADER_SIZE - query_complete->info_buf_offset
724 < query_complete->info_buflen) {
725 ret = -1;
726 goto cleanup;
727 }
728
729 memcpy(result,
730 (void *)((unsigned long)query_complete +
731 query_complete->info_buf_offset),
732 query_complete->info_buflen);
733
734 *result_size = query_complete->info_buflen;
735
736cleanup:
737 if (request)
738 put_rndis_request(dev, request);
739
740 return ret;
741}
742
743
744static int
745rndis_query_hwcaps(struct rndis_device *dev, struct netvsc_device *net_device,
746 struct ndis_offload *caps)
747{
748 u32 caps_len = sizeof(*caps);
749 int ret;
750
751 memset(caps, 0, sizeof(*caps));
752
753 ret = rndis_filter_query_device(dev, net_device,
754 OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
755 caps, &caps_len);
756 if (ret)
757 return ret;
758
759 if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) {
760 netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n",
761 caps->header.type);
762 return -EINVAL;
763 }
764
765 if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) {
766 netdev_warn(dev->ndev, "invalid NDIS objrev %x\n",
767 caps->header.revision);
768 return -EINVAL;
769 }
770
771 if (caps->header.size > caps_len ||
772 caps->header.size < NDIS_OFFLOAD_SIZE_6_0) {
773 netdev_warn(dev->ndev,
774 "invalid NDIS objsize %u, data size %u\n",
775 caps->header.size, caps_len);
776 return -EINVAL;
777 }
778
779 return 0;
780}
781
782static int rndis_filter_query_device_mac(struct rndis_device *dev,
783 struct netvsc_device *net_device)
784{
785 u32 size = ETH_ALEN;
786
787 return rndis_filter_query_device(dev, net_device,
788 RNDIS_OID_802_3_PERMANENT_ADDRESS,
789 dev->hw_mac_adr, &size);
790}
791
792#define NWADR_STR "NetworkAddress"
793#define NWADR_STRLEN 14
794
795int rndis_filter_set_device_mac(struct netvsc_device *nvdev,
796 const char *mac)
797{
798 struct rndis_device *rdev = nvdev->extension;
799 struct rndis_request *request;
800 struct rndis_set_request *set;
801 struct rndis_config_parameter_info *cpi;
802 wchar_t *cfg_nwadr, *cfg_mac;
803 struct rndis_set_complete *set_complete;
804 char macstr[2*ETH_ALEN+1];
805 u32 extlen = sizeof(struct rndis_config_parameter_info) +
806 2*NWADR_STRLEN + 4*ETH_ALEN;
807 int ret;
808
809 request = get_rndis_request(rdev, RNDIS_MSG_SET,
810 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
811 if (!request)
812 return -ENOMEM;
813
814 set = &request->request_msg.msg.set_req;
815 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
816 set->info_buflen = extlen;
817 set->info_buf_offset = sizeof(struct rndis_set_request);
818 set->dev_vc_handle = 0;
819
820 cpi = (struct rndis_config_parameter_info *)((ulong)set +
821 set->info_buf_offset);
822 cpi->parameter_name_offset =
823 sizeof(struct rndis_config_parameter_info);
824
825 cpi->parameter_name_length = 2*NWADR_STRLEN;
826 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
827 cpi->parameter_value_offset =
828 cpi->parameter_name_offset + cpi->parameter_name_length;
829
830 cpi->parameter_value_length = 4*ETH_ALEN;
831
832 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
833 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
834 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
835 cfg_nwadr, NWADR_STRLEN);
836 if (ret < 0)
837 goto cleanup;
838 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
839 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
840 cfg_mac, 2*ETH_ALEN);
841 if (ret < 0)
842 goto cleanup;
843
844 ret = rndis_filter_send_request(rdev, request);
845 if (ret != 0)
846 goto cleanup;
847
848 wait_for_completion(&request->wait_event);
849
850 set_complete = &request->response_msg.msg.set_complete;
851 if (set_complete->status != RNDIS_STATUS_SUCCESS)
852 ret = -EIO;
853
854cleanup:
855 put_rndis_request(rdev, request);
856 return ret;
857}
858
859int
860rndis_filter_set_offload_params(struct net_device *ndev,
861 struct netvsc_device *nvdev,
862 struct ndis_offload_params *req_offloads)
863{
864 struct rndis_device *rdev = nvdev->extension;
865 struct rndis_request *request;
866 struct rndis_set_request *set;
867 struct ndis_offload_params *offload_params;
868 struct rndis_set_complete *set_complete;
869 u32 extlen = sizeof(struct ndis_offload_params);
870 int ret;
871 u32 vsp_version = nvdev->nvsp_version;
872
873 if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
874 extlen = VERSION_4_OFFLOAD_SIZE;
875
876
877
878 req_offloads->udp_ip_v4_csum = 0;
879 req_offloads->udp_ip_v6_csum = 0;
880 }
881
882 request = get_rndis_request(rdev, RNDIS_MSG_SET,
883 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
884 if (!request)
885 return -ENOMEM;
886
887 set = &request->request_msg.msg.set_req;
888 set->oid = OID_TCP_OFFLOAD_PARAMETERS;
889 set->info_buflen = extlen;
890 set->info_buf_offset = sizeof(struct rndis_set_request);
891 set->dev_vc_handle = 0;
892
893 offload_params = (struct ndis_offload_params *)((ulong)set +
894 set->info_buf_offset);
895 *offload_params = *req_offloads;
896 offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
897 offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
898 offload_params->header.size = extlen;
899
900 ret = rndis_filter_send_request(rdev, request);
901 if (ret != 0)
902 goto cleanup;
903
904 wait_for_completion(&request->wait_event);
905 set_complete = &request->response_msg.msg.set_complete;
906 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
907 netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
908 set_complete->status);
909 ret = -EINVAL;
910 }
911
912cleanup:
913 put_rndis_request(rdev, request);
914 return ret;
915}
916
917static int rndis_set_rss_param_msg(struct rndis_device *rdev,
918 const u8 *rss_key, u16 flag)
919{
920 struct net_device *ndev = rdev->ndev;
921 struct net_device_context *ndc = netdev_priv(ndev);
922 struct rndis_request *request;
923 struct rndis_set_request *set;
924 struct rndis_set_complete *set_complete;
925 u32 extlen = sizeof(struct ndis_recv_scale_param) +
926 4 * ITAB_NUM + NETVSC_HASH_KEYLEN;
927 struct ndis_recv_scale_param *rssp;
928 u32 *itab;
929 u8 *keyp;
930 int i, ret;
931
932 request = get_rndis_request(
933 rdev, RNDIS_MSG_SET,
934 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
935 if (!request)
936 return -ENOMEM;
937
938 set = &request->request_msg.msg.set_req;
939 set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
940 set->info_buflen = extlen;
941 set->info_buf_offset = sizeof(struct rndis_set_request);
942 set->dev_vc_handle = 0;
943
944 rssp = (struct ndis_recv_scale_param *)(set + 1);
945 rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
946 rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
947 rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
948 rssp->flag = flag;
949 rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
950 NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
951 NDIS_HASH_TCP_IPV6;
952 rssp->indirect_tabsize = 4*ITAB_NUM;
953 rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
954 rssp->hashkey_size = NETVSC_HASH_KEYLEN;
955 rssp->hashkey_offset = rssp->indirect_taboffset +
956 rssp->indirect_tabsize;
957
958
959 itab = (u32 *)(rssp + 1);
960 for (i = 0; i < ITAB_NUM; i++)
961 itab[i] = ndc->rx_table[i];
962
963
964 keyp = (u8 *)((unsigned long)rssp + rssp->hashkey_offset);
965 memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
966
967 ret = rndis_filter_send_request(rdev, request);
968 if (ret != 0)
969 goto cleanup;
970
971 wait_for_completion(&request->wait_event);
972 set_complete = &request->response_msg.msg.set_complete;
973 if (set_complete->status == RNDIS_STATUS_SUCCESS) {
974 if (!(flag & NDIS_RSS_PARAM_FLAG_DISABLE_RSS) &&
975 !(flag & NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED))
976 memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
977
978 } else {
979 netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
980 set_complete->status);
981 ret = -EINVAL;
982 }
983
984cleanup:
985 put_rndis_request(rdev, request);
986 return ret;
987}
988
989int rndis_filter_set_rss_param(struct rndis_device *rdev,
990 const u8 *rss_key)
991{
992
993 rndis_set_rss_param_msg(rdev, rss_key,
994 NDIS_RSS_PARAM_FLAG_DISABLE_RSS);
995
996 return rndis_set_rss_param_msg(rdev, rss_key, 0);
997}
998
999static int rndis_filter_query_device_link_status(struct rndis_device *dev,
1000 struct netvsc_device *net_device)
1001{
1002 u32 size = sizeof(u32);
1003 u32 link_status;
1004
1005 return rndis_filter_query_device(dev, net_device,
1006 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
1007 &link_status, &size);
1008}
1009
1010static int rndis_filter_query_link_speed(struct rndis_device *dev,
1011 struct netvsc_device *net_device)
1012{
1013 u32 size = sizeof(u32);
1014 u32 link_speed;
1015 struct net_device_context *ndc;
1016 int ret;
1017
1018 ret = rndis_filter_query_device(dev, net_device,
1019 RNDIS_OID_GEN_LINK_SPEED,
1020 &link_speed, &size);
1021
1022 if (!ret) {
1023 ndc = netdev_priv(dev->ndev);
1024
1025
1026
1027
1028 ndc->speed = link_speed / 10000;
1029 }
1030
1031 return ret;
1032}
1033
1034static int rndis_filter_set_packet_filter(struct rndis_device *dev,
1035 u32 new_filter)
1036{
1037 struct rndis_request *request;
1038 struct rndis_set_request *set;
1039 int ret;
1040
1041 if (dev->filter == new_filter)
1042 return 0;
1043
1044 request = get_rndis_request(dev, RNDIS_MSG_SET,
1045 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
1046 sizeof(u32));
1047 if (!request)
1048 return -ENOMEM;
1049
1050
1051 set = &request->request_msg.msg.set_req;
1052 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
1053 set->info_buflen = sizeof(u32);
1054 set->info_buf_offset = offsetof(typeof(*set), info_buf);
1055 memcpy(set->info_buf, &new_filter, sizeof(u32));
1056
1057 ret = rndis_filter_send_request(dev, request);
1058 if (ret == 0) {
1059 wait_for_completion(&request->wait_event);
1060 dev->filter = new_filter;
1061 }
1062
1063 put_rndis_request(dev, request);
1064
1065 return ret;
1066}
1067
1068static void rndis_set_multicast(struct work_struct *w)
1069{
1070 struct rndis_device *rdev
1071 = container_of(w, struct rndis_device, mcast_work);
1072 u32 filter = NDIS_PACKET_TYPE_DIRECTED;
1073 unsigned int flags = rdev->ndev->flags;
1074
1075 if (flags & IFF_PROMISC) {
1076 filter = NDIS_PACKET_TYPE_PROMISCUOUS;
1077 } else {
1078 if (!netdev_mc_empty(rdev->ndev) || (flags & IFF_ALLMULTI))
1079 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
1080 if (flags & IFF_BROADCAST)
1081 filter |= NDIS_PACKET_TYPE_BROADCAST;
1082 }
1083
1084 rndis_filter_set_packet_filter(rdev, filter);
1085}
1086
1087void rndis_filter_update(struct netvsc_device *nvdev)
1088{
1089 struct rndis_device *rdev = nvdev->extension;
1090
1091 schedule_work(&rdev->mcast_work);
1092}
1093
1094static int rndis_filter_init_device(struct rndis_device *dev,
1095 struct netvsc_device *nvdev)
1096{
1097 struct rndis_request *request;
1098 struct rndis_initialize_request *init;
1099 struct rndis_initialize_complete *init_complete;
1100 u32 status;
1101 int ret;
1102
1103 request = get_rndis_request(dev, RNDIS_MSG_INIT,
1104 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
1105 if (!request) {
1106 ret = -ENOMEM;
1107 goto cleanup;
1108 }
1109
1110
1111 init = &request->request_msg.msg.init_req;
1112 init->major_ver = RNDIS_MAJOR_VERSION;
1113 init->minor_ver = RNDIS_MINOR_VERSION;
1114 init->max_xfer_size = 0x4000;
1115
1116 dev->state = RNDIS_DEV_INITIALIZING;
1117
1118 ret = rndis_filter_send_request(dev, request);
1119 if (ret != 0) {
1120 dev->state = RNDIS_DEV_UNINITIALIZED;
1121 goto cleanup;
1122 }
1123
1124 wait_for_completion(&request->wait_event);
1125
1126 init_complete = &request->response_msg.msg.init_complete;
1127 status = init_complete->status;
1128 if (status == RNDIS_STATUS_SUCCESS) {
1129 dev->state = RNDIS_DEV_INITIALIZED;
1130 nvdev->max_pkt = init_complete->max_pkt_per_msg;
1131 nvdev->pkt_align = 1 << init_complete->pkt_alignment_factor;
1132 ret = 0;
1133 } else {
1134 dev->state = RNDIS_DEV_UNINITIALIZED;
1135 ret = -EINVAL;
1136 }
1137
1138cleanup:
1139 if (request)
1140 put_rndis_request(dev, request);
1141
1142 return ret;
1143}
1144
1145static bool netvsc_device_idle(const struct netvsc_device *nvdev)
1146{
1147 int i;
1148
1149 for (i = 0; i < nvdev->num_chn; i++) {
1150 const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
1151
1152 if (nvchan->mrc.first != nvchan->mrc.next)
1153 return false;
1154
1155 if (atomic_read(&nvchan->queue_sends) > 0)
1156 return false;
1157 }
1158
1159 return true;
1160}
1161
1162static void rndis_filter_halt_device(struct netvsc_device *nvdev,
1163 struct rndis_device *dev)
1164{
1165 struct rndis_request *request;
1166 struct rndis_halt_request *halt;
1167
1168
1169 request = get_rndis_request(dev, RNDIS_MSG_HALT,
1170 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
1171 if (!request)
1172 goto cleanup;
1173
1174
1175 halt = &request->request_msg.msg.halt_req;
1176 halt->req_id = atomic_inc_return(&dev->new_req_id);
1177
1178
1179 rndis_filter_send_request(dev, request);
1180
1181 dev->state = RNDIS_DEV_UNINITIALIZED;
1182
1183cleanup:
1184 nvdev->destroy = true;
1185
1186
1187 wmb();
1188
1189
1190 wait_event(nvdev->wait_drain, netvsc_device_idle(nvdev));
1191
1192 if (request)
1193 put_rndis_request(dev, request);
1194}
1195
1196static int rndis_filter_open_device(struct rndis_device *dev)
1197{
1198 int ret;
1199
1200 if (dev->state != RNDIS_DEV_INITIALIZED)
1201 return 0;
1202
1203 ret = rndis_filter_set_packet_filter(dev,
1204 NDIS_PACKET_TYPE_BROADCAST |
1205 NDIS_PACKET_TYPE_ALL_MULTICAST |
1206 NDIS_PACKET_TYPE_DIRECTED);
1207 if (ret == 0)
1208 dev->state = RNDIS_DEV_DATAINITIALIZED;
1209
1210 return ret;
1211}
1212
1213static int rndis_filter_close_device(struct rndis_device *dev)
1214{
1215 int ret;
1216
1217 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
1218 return 0;
1219
1220
1221 cancel_work_sync(&dev->mcast_work);
1222
1223 ret = rndis_filter_set_packet_filter(dev, 0);
1224 if (ret == -ENODEV)
1225 ret = 0;
1226
1227 if (ret == 0)
1228 dev->state = RNDIS_DEV_INITIALIZED;
1229
1230 return ret;
1231}
1232
1233static void netvsc_sc_open(struct vmbus_channel *new_sc)
1234{
1235 struct net_device *ndev =
1236 hv_get_drvdata(new_sc->primary_channel->device_obj);
1237 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1238 struct netvsc_device *nvscdev;
1239 u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
1240 struct netvsc_channel *nvchan;
1241 int ret;
1242
1243
1244
1245
1246 nvscdev = rcu_dereference_raw(ndev_ctx->nvdev);
1247 if (!nvscdev || chn_index >= nvscdev->num_chn)
1248 return;
1249
1250 nvchan = nvscdev->chan_table + chn_index;
1251
1252
1253
1254
1255 set_channel_read_mode(new_sc, HV_CALL_ISR);
1256
1257
1258 nvchan->channel = new_sc;
1259
1260 new_sc->next_request_id_callback = vmbus_next_request_id;
1261 new_sc->request_addr_callback = vmbus_request_addr;
1262 new_sc->rqstor_size = netvsc_rqstor_size(netvsc_ring_bytes);
1263 new_sc->max_pkt_size = NETVSC_MAX_PKT_SIZE;
1264
1265 ret = vmbus_open(new_sc, netvsc_ring_bytes,
1266 netvsc_ring_bytes, NULL, 0,
1267 netvsc_channel_cb, nvchan);
1268 if (ret == 0)
1269 napi_enable(&nvchan->napi);
1270 else
1271 netdev_notice(ndev, "sub channel open failed: %d\n", ret);
1272
1273 if (atomic_inc_return(&nvscdev->open_chn) == nvscdev->num_chn)
1274 wake_up(&nvscdev->subchan_open);
1275}
1276
1277
1278
1279
1280
1281int rndis_set_subchannel(struct net_device *ndev,
1282 struct netvsc_device *nvdev,
1283 struct netvsc_device_info *dev_info)
1284{
1285 struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
1286 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1287 struct hv_device *hv_dev = ndev_ctx->device_ctx;
1288 struct rndis_device *rdev = nvdev->extension;
1289 int i, ret;
1290
1291 ASSERT_RTNL();
1292
1293 memset(init_packet, 0, sizeof(struct nvsp_message));
1294 init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
1295 init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
1296 init_packet->msg.v5_msg.subchn_req.num_subchannels =
1297 nvdev->num_chn - 1;
1298 trace_nvsp_send(ndev, init_packet);
1299
1300 ret = vmbus_sendpacket(hv_dev->channel, init_packet,
1301 sizeof(struct nvsp_message),
1302 (unsigned long)init_packet,
1303 VM_PKT_DATA_INBAND,
1304 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
1305 if (ret) {
1306 netdev_err(ndev, "sub channel allocate send failed: %d\n", ret);
1307 return ret;
1308 }
1309
1310 wait_for_completion(&nvdev->channel_init_wait);
1311 if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
1312 netdev_err(ndev, "sub channel request failed\n");
1313 return -EIO;
1314 }
1315
1316
1317 if (init_packet->msg.v5_msg.subchn_comp.num_subchannels > nvdev->num_chn - 1) {
1318 netdev_err(ndev, "invalid number of allocated sub channel\n");
1319 return -EINVAL;
1320 }
1321 nvdev->num_chn = 1 +
1322 init_packet->msg.v5_msg.subchn_comp.num_subchannels;
1323
1324
1325 wait_event(nvdev->subchan_open,
1326 atomic_read(&nvdev->open_chn) == nvdev->num_chn);
1327
1328 for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
1329 ndev_ctx->tx_table[i] = i % nvdev->num_chn;
1330
1331
1332 if (dev_info)
1333 rndis_filter_set_rss_param(rdev, dev_info->rss_key);
1334 else
1335 rndis_filter_set_rss_param(rdev, netvsc_hash_key);
1336
1337 netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
1338 netif_set_real_num_rx_queues(ndev, nvdev->num_chn);
1339
1340 return 0;
1341}
1342
1343static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
1344 struct netvsc_device *nvdev)
1345{
1346 struct net_device *net = rndis_device->ndev;
1347 struct net_device_context *net_device_ctx = netdev_priv(net);
1348 struct ndis_offload hwcaps;
1349 struct ndis_offload_params offloads;
1350 unsigned int gso_max_size = GSO_MAX_SIZE;
1351 int ret;
1352
1353
1354 ret = rndis_query_hwcaps(rndis_device, nvdev, &hwcaps);
1355 if (ret != 0)
1356 return ret;
1357
1358
1359 memset(&offloads, 0, sizeof(struct ndis_offload_params));
1360
1361
1362 offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED;
1363
1364
1365 net->hw_features &= ~NETVSC_SUPPORTED_HW_FEATURES;
1366 net_device_ctx->tx_checksum_mask = 0;
1367
1368
1369 net->hw_features |= NETIF_F_RXCSUM;
1370 net->hw_features |= NETIF_F_SG;
1371 net->hw_features |= NETIF_F_RXHASH;
1372
1373 if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
1374
1375 net->hw_features |= NETIF_F_IP_CSUM;
1376 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP;
1377
1378 offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1379
1380 if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) {
1381 offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1382 net->hw_features |= NETIF_F_TSO;
1383
1384 if (hwcaps.lsov2.ip4_maxsz < gso_max_size)
1385 gso_max_size = hwcaps.lsov2.ip4_maxsz;
1386 }
1387
1388 if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) {
1389 offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1390 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP;
1391 }
1392 }
1393
1394 if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) {
1395 net->hw_features |= NETIF_F_IPV6_CSUM;
1396
1397 offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1398 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP;
1399
1400 if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) &&
1401 (hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) {
1402 offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1403 net->hw_features |= NETIF_F_TSO6;
1404
1405 if (hwcaps.lsov2.ip6_maxsz < gso_max_size)
1406 gso_max_size = hwcaps.lsov2.ip6_maxsz;
1407 }
1408
1409 if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) {
1410 offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1411 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP;
1412 }
1413 }
1414
1415 if (hwcaps.rsc.ip4 && hwcaps.rsc.ip6) {
1416 net->hw_features |= NETIF_F_LRO;
1417
1418 if (net->features & NETIF_F_LRO) {
1419 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1420 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1421 } else {
1422 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1423 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1424 }
1425 }
1426
1427
1428
1429
1430 net->features &= ~NETVSC_SUPPORTED_HW_FEATURES | net->hw_features;
1431
1432 netif_set_gso_max_size(net, gso_max_size);
1433
1434 ret = rndis_filter_set_offload_params(net, nvdev, &offloads);
1435
1436 return ret;
1437}
1438
1439static void rndis_get_friendly_name(struct net_device *net,
1440 struct rndis_device *rndis_device,
1441 struct netvsc_device *net_device)
1442{
1443 ucs2_char_t wname[256];
1444 unsigned long len;
1445 u8 ifalias[256];
1446 u32 size;
1447
1448 size = sizeof(wname);
1449 if (rndis_filter_query_device(rndis_device, net_device,
1450 RNDIS_OID_GEN_FRIENDLY_NAME,
1451 wname, &size) != 0)
1452 return;
1453
1454 if (size == 0)
1455 return;
1456
1457
1458 len = ucs2_as_utf8(ifalias, wname, sizeof(ifalias));
1459
1460
1461 if (strcmp(ifalias, "Network Adapter") != 0)
1462 dev_set_alias(net, ifalias, len);
1463}
1464
1465struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
1466 struct netvsc_device_info *device_info)
1467{
1468 struct net_device *net = hv_get_drvdata(dev);
1469 struct net_device_context *ndc = netdev_priv(net);
1470 struct netvsc_device *net_device;
1471 struct rndis_device *rndis_device;
1472 struct ndis_recv_scale_cap rsscap;
1473 u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
1474 u32 mtu, size;
1475 u32 num_possible_rss_qs;
1476 int i, ret;
1477
1478 rndis_device = get_rndis_device();
1479 if (!rndis_device)
1480 return ERR_PTR(-ENODEV);
1481
1482
1483
1484
1485
1486 net_device = netvsc_device_add(dev, device_info);
1487 if (IS_ERR(net_device)) {
1488 kfree(rndis_device);
1489 return net_device;
1490 }
1491
1492
1493 net_device->max_chn = 1;
1494 net_device->num_chn = 1;
1495
1496 net_device->extension = rndis_device;
1497 rndis_device->ndev = net;
1498
1499
1500 ret = rndis_filter_init_device(rndis_device, net_device);
1501 if (ret != 0)
1502 goto err_dev_remv;
1503
1504
1505 size = sizeof(u32);
1506 ret = rndis_filter_query_device(rndis_device, net_device,
1507 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
1508 &mtu, &size);
1509 if (ret == 0 && size == sizeof(u32) && mtu < net->mtu)
1510 net->mtu = mtu;
1511
1512
1513 ret = rndis_filter_query_device_mac(rndis_device, net_device);
1514 if (ret != 0)
1515 goto err_dev_remv;
1516
1517 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
1518
1519
1520 if (!net->ifalias)
1521 rndis_get_friendly_name(net, rndis_device, net_device);
1522
1523
1524 ret = rndis_netdev_set_hwcaps(rndis_device, net_device);
1525 if (ret != 0)
1526 goto err_dev_remv;
1527
1528 rndis_filter_query_device_link_status(rndis_device, net_device);
1529
1530 netdev_dbg(net, "Device MAC %pM link state %s\n",
1531 rndis_device->hw_mac_adr,
1532 rndis_device->link_state ? "down" : "up");
1533
1534 if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
1535 goto out;
1536
1537 rndis_filter_query_link_speed(rndis_device, net_device);
1538
1539
1540 memset(&rsscap, 0, rsscap_size);
1541 ret = rndis_filter_query_device(rndis_device, net_device,
1542 OID_GEN_RECEIVE_SCALE_CAPABILITIES,
1543 &rsscap, &rsscap_size);
1544 if (ret || rsscap.num_recv_que < 2)
1545 goto out;
1546
1547
1548 num_possible_rss_qs = min_t(u32, num_online_cpus(),
1549 rsscap.num_recv_que);
1550
1551 net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, num_possible_rss_qs);
1552
1553
1554 net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
1555
1556 if (!netif_is_rxfh_configured(net)) {
1557 for (i = 0; i < ITAB_NUM; i++)
1558 ndc->rx_table[i] = ethtool_rxfh_indir_default(
1559 i, net_device->num_chn);
1560 }
1561
1562 atomic_set(&net_device->open_chn, 1);
1563 vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
1564
1565 for (i = 1; i < net_device->num_chn; i++) {
1566 ret = netvsc_alloc_recv_comp_ring(net_device, i);
1567 if (ret) {
1568 while (--i != 0)
1569 vfree(net_device->chan_table[i].mrc.slots);
1570 goto out;
1571 }
1572 }
1573
1574 for (i = 1; i < net_device->num_chn; i++)
1575 netif_napi_add(net, &net_device->chan_table[i].napi,
1576 netvsc_poll, NAPI_POLL_WEIGHT);
1577
1578 return net_device;
1579
1580out:
1581
1582 net_device->max_chn = 1;
1583 net_device->num_chn = 1;
1584 return net_device;
1585
1586err_dev_remv:
1587 rndis_filter_device_remove(dev, net_device);
1588 return ERR_PTR(ret);
1589}
1590
1591void rndis_filter_device_remove(struct hv_device *dev,
1592 struct netvsc_device *net_dev)
1593{
1594 struct rndis_device *rndis_dev = net_dev->extension;
1595
1596
1597 rndis_filter_halt_device(net_dev, rndis_dev);
1598
1599 netvsc_device_remove(dev);
1600}
1601
1602int rndis_filter_open(struct netvsc_device *nvdev)
1603{
1604 if (!nvdev)
1605 return -EINVAL;
1606
1607 return rndis_filter_open_device(nvdev->extension);
1608}
1609
1610int rndis_filter_close(struct netvsc_device *nvdev)
1611{
1612 if (!nvdev)
1613 return -EINVAL;
1614
1615 return rndis_filter_close_device(nvdev->extension);
1616}
1617