1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2009, Microsoft Corporation.
4 *
5 * Authors:
6 * Haiyang Zhang <haiyangz@microsoft.com>
7 * Hank Janssen <hjanssen@microsoft.com>
8 */
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 #include <linux/string.h>
24 #include <linux/slab.h>
25
26 #include "hyperv_net.h"
27 #include "netvsc_trace.h"
28
29 static void rndis_set_multicast(struct work_struct *w);
30
31 #define RNDIS_EXT_LEN HV_HYP_PAGE_SIZE
32 struct rndis_request {
33 struct list_head list_ent;
34 struct completion wait_event;
35
36 struct rndis_message response_msg;
37 /*
38 * The buffer for extended info after the RNDIS response message. It's
39 * referenced based on the data offset in the RNDIS message. Its size
40 * is enough for current needs, and should be sufficient for the near
41 * future.
42 */
43 u8 response_ext[RNDIS_EXT_LEN];
44
45 /* Simplify allocation by having a netvsc packet inline */
46 struct hv_netvsc_packet pkt;
47
48 struct rndis_message request_msg;
49 /*
50 * The buffer for the extended info after the RNDIS request message.
51 * It is referenced and sized in a similar way as response_ext.
52 */
53 u8 request_ext[RNDIS_EXT_LEN];
54 };
55
56 static const u8 netvsc_hash_key[NETVSC_HASH_KEYLEN] = {
57 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
58 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
59 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
60 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
61 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa
62 };
63
get_rndis_device(void)64 static struct rndis_device *get_rndis_device(void)
65 {
66 struct rndis_device *device;
67
68 device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
69 if (!device)
70 return NULL;
71
72 spin_lock_init(&device->request_lock);
73
74 INIT_LIST_HEAD(&device->req_list);
75 INIT_WORK(&device->mcast_work, rndis_set_multicast);
76
77 device->state = RNDIS_DEV_UNINITIALIZED;
78
79 return device;
80 }
81
get_rndis_request(struct rndis_device * dev,u32 msg_type,u32 msg_len)82 static struct rndis_request *get_rndis_request(struct rndis_device *dev,
83 u32 msg_type,
84 u32 msg_len)
85 {
86 struct rndis_request *request;
87 struct rndis_message *rndis_msg;
88 struct rndis_set_request *set;
89 unsigned long flags;
90
91 request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
92 if (!request)
93 return NULL;
94
95 init_completion(&request->wait_event);
96
97 rndis_msg = &request->request_msg;
98 rndis_msg->ndis_msg_type = msg_type;
99 rndis_msg->msg_len = msg_len;
100
101 request->pkt.q_idx = 0;
102
103 /*
104 * Set the request id. This field is always after the rndis header for
105 * request/response packet types so we just used the SetRequest as a
106 * template
107 */
108 set = &rndis_msg->msg.set_req;
109 set->req_id = atomic_inc_return(&dev->new_req_id);
110
111 /* Add to the request list */
112 spin_lock_irqsave(&dev->request_lock, flags);
113 list_add_tail(&request->list_ent, &dev->req_list);
114 spin_unlock_irqrestore(&dev->request_lock, flags);
115
116 return request;
117 }
118
put_rndis_request(struct rndis_device * dev,struct rndis_request * req)119 static void put_rndis_request(struct rndis_device *dev,
120 struct rndis_request *req)
121 {
122 unsigned long flags;
123
124 spin_lock_irqsave(&dev->request_lock, flags);
125 list_del(&req->list_ent);
126 spin_unlock_irqrestore(&dev->request_lock, flags);
127
128 kfree(req);
129 }
130
dump_rndis_message(struct net_device * netdev,const struct rndis_message * rndis_msg,const void * data)131 static void dump_rndis_message(struct net_device *netdev,
132 const struct rndis_message *rndis_msg,
133 const void *data)
134 {
135 switch (rndis_msg->ndis_msg_type) {
136 case RNDIS_MSG_PACKET:
137 if (rndis_msg->msg_len - RNDIS_HEADER_SIZE >= sizeof(struct rndis_packet)) {
138 const struct rndis_packet *pkt = data + RNDIS_HEADER_SIZE;
139 netdev_dbg(netdev, "RNDIS_MSG_PACKET (len %u, "
140 "data offset %u data len %u, # oob %u, "
141 "oob offset %u, oob len %u, pkt offset %u, "
142 "pkt len %u\n",
143 rndis_msg->msg_len,
144 pkt->data_offset,
145 pkt->data_len,
146 pkt->num_oob_data_elements,
147 pkt->oob_data_offset,
148 pkt->oob_data_len,
149 pkt->per_pkt_info_offset,
150 pkt->per_pkt_info_len);
151 }
152 break;
153
154 case RNDIS_MSG_INIT_C:
155 if (rndis_msg->msg_len - RNDIS_HEADER_SIZE >=
156 sizeof(struct rndis_initialize_complete)) {
157 const struct rndis_initialize_complete *init_complete =
158 data + RNDIS_HEADER_SIZE;
159 netdev_dbg(netdev, "RNDIS_MSG_INIT_C "
160 "(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
161 "device flags %d, max xfer size 0x%x, max pkts %u, "
162 "pkt aligned %u)\n",
163 rndis_msg->msg_len,
164 init_complete->req_id,
165 init_complete->status,
166 init_complete->major_ver,
167 init_complete->minor_ver,
168 init_complete->dev_flags,
169 init_complete->max_xfer_size,
170 init_complete->max_pkt_per_msg,
171 init_complete->pkt_alignment_factor);
172 }
173 break;
174
175 case RNDIS_MSG_QUERY_C:
176 if (rndis_msg->msg_len - RNDIS_HEADER_SIZE >=
177 sizeof(struct rndis_query_complete)) {
178 const struct rndis_query_complete *query_complete =
179 data + RNDIS_HEADER_SIZE;
180 netdev_dbg(netdev, "RNDIS_MSG_QUERY_C "
181 "(len %u, id 0x%x, status 0x%x, buf len %u, "
182 "buf offset %u)\n",
183 rndis_msg->msg_len,
184 query_complete->req_id,
185 query_complete->status,
186 query_complete->info_buflen,
187 query_complete->info_buf_offset);
188 }
189 break;
190
191 case RNDIS_MSG_SET_C:
192 if (rndis_msg->msg_len - RNDIS_HEADER_SIZE + sizeof(struct rndis_set_complete)) {
193 const struct rndis_set_complete *set_complete =
194 data + RNDIS_HEADER_SIZE;
195 netdev_dbg(netdev,
196 "RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
197 rndis_msg->msg_len,
198 set_complete->req_id,
199 set_complete->status);
200 }
201 break;
202
203 case RNDIS_MSG_INDICATE:
204 if (rndis_msg->msg_len - RNDIS_HEADER_SIZE >=
205 sizeof(struct rndis_indicate_status)) {
206 const struct rndis_indicate_status *indicate_status =
207 data + RNDIS_HEADER_SIZE;
208 netdev_dbg(netdev, "RNDIS_MSG_INDICATE "
209 "(len %u, status 0x%x, buf len %u, buf offset %u)\n",
210 rndis_msg->msg_len,
211 indicate_status->status,
212 indicate_status->status_buflen,
213 indicate_status->status_buf_offset);
214 }
215 break;
216
217 default:
218 netdev_dbg(netdev, "0x%x (len %u)\n",
219 rndis_msg->ndis_msg_type,
220 rndis_msg->msg_len);
221 break;
222 }
223 }
224
rndis_filter_send_request(struct rndis_device * dev,struct rndis_request * req)225 static int rndis_filter_send_request(struct rndis_device *dev,
226 struct rndis_request *req)
227 {
228 struct hv_netvsc_packet *packet;
229 struct hv_page_buffer page_buf[2];
230 struct hv_page_buffer *pb = page_buf;
231 int ret;
232
233 /* Setup the packet to send it */
234 packet = &req->pkt;
235
236 packet->total_data_buflen = req->request_msg.msg_len;
237 packet->page_buf_cnt = 1;
238
239 pb[0].pfn = virt_to_phys(&req->request_msg) >>
240 HV_HYP_PAGE_SHIFT;
241 pb[0].len = req->request_msg.msg_len;
242 pb[0].offset = offset_in_hvpage(&req->request_msg);
243
244 /* Add one page_buf when request_msg crossing page boundary */
245 if (pb[0].offset + pb[0].len > HV_HYP_PAGE_SIZE) {
246 packet->page_buf_cnt++;
247 pb[0].len = HV_HYP_PAGE_SIZE -
248 pb[0].offset;
249 pb[1].pfn = virt_to_phys((void *)&req->request_msg
250 + pb[0].len) >> HV_HYP_PAGE_SHIFT;
251 pb[1].offset = 0;
252 pb[1].len = req->request_msg.msg_len -
253 pb[0].len;
254 }
255
256 trace_rndis_send(dev->ndev, 0, &req->request_msg);
257
258 rcu_read_lock_bh();
259 ret = netvsc_send(dev->ndev, packet, NULL, pb, NULL, false);
260 rcu_read_unlock_bh();
261
262 return ret;
263 }
264
rndis_set_link_state(struct rndis_device * rdev,struct rndis_request * request)265 static void rndis_set_link_state(struct rndis_device *rdev,
266 struct rndis_request *request)
267 {
268 u32 link_status;
269 struct rndis_query_complete *query_complete;
270 u32 msg_len = request->response_msg.msg_len;
271
272 /* Ensure the packet is big enough to access its fields */
273 if (msg_len - RNDIS_HEADER_SIZE < sizeof(struct rndis_query_complete))
274 return;
275
276 query_complete = &request->response_msg.msg.query_complete;
277
278 if (query_complete->status == RNDIS_STATUS_SUCCESS &&
279 query_complete->info_buflen >= sizeof(u32) &&
280 query_complete->info_buf_offset >= sizeof(*query_complete) &&
281 msg_len - RNDIS_HEADER_SIZE >= query_complete->info_buf_offset &&
282 msg_len - RNDIS_HEADER_SIZE - query_complete->info_buf_offset
283 >= query_complete->info_buflen) {
284 memcpy(&link_status, (void *)((unsigned long)query_complete +
285 query_complete->info_buf_offset), sizeof(u32));
286 rdev->link_state = link_status != 0;
287 }
288 }
289
rndis_filter_receive_response(struct net_device * ndev,struct netvsc_device * nvdev,struct rndis_message * resp,void * data)290 static void rndis_filter_receive_response(struct net_device *ndev,
291 struct netvsc_device *nvdev,
292 struct rndis_message *resp,
293 void *data)
294 {
295 u32 *req_id = &resp->msg.init_complete.req_id;
296 struct rndis_device *dev = nvdev->extension;
297 struct rndis_request *request = NULL;
298 bool found = false;
299 unsigned long flags;
300
301 /* This should never happen, it means control message
302 * response received after device removed.
303 */
304 if (dev->state == RNDIS_DEV_UNINITIALIZED) {
305 netdev_err(ndev,
306 "got rndis message uninitialized\n");
307 return;
308 }
309
310 /* Ensure the packet is big enough to read req_id. Req_id is the 1st
311 * field in any request/response message, so the payload should have at
312 * least sizeof(u32) bytes
313 */
314 if (resp->msg_len - RNDIS_HEADER_SIZE < sizeof(u32)) {
315 netdev_err(ndev, "rndis msg_len too small: %u\n",
316 resp->msg_len);
317 return;
318 }
319
320 /* Copy the request ID into nvchan->recv_buf */
321 *req_id = *(u32 *)(data + RNDIS_HEADER_SIZE);
322
323 spin_lock_irqsave(&dev->request_lock, flags);
324 list_for_each_entry(request, &dev->req_list, list_ent) {
325 /*
326 * All request/response message contains RequestId as the 1st
327 * field
328 */
329 if (request->request_msg.msg.init_req.req_id == *req_id) {
330 found = true;
331 break;
332 }
333 }
334 spin_unlock_irqrestore(&dev->request_lock, flags);
335
336 if (found) {
337 if (resp->msg_len <=
338 sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
339 memcpy(&request->response_msg, resp, RNDIS_HEADER_SIZE + sizeof(*req_id));
340 unsafe_memcpy((void *)&request->response_msg + RNDIS_HEADER_SIZE + sizeof(*req_id),
341 data + RNDIS_HEADER_SIZE + sizeof(*req_id),
342 resp->msg_len - RNDIS_HEADER_SIZE - sizeof(*req_id),
343 "request->response_msg is followed by a padding of RNDIS_EXT_LEN inside rndis_request");
344 if (request->request_msg.ndis_msg_type ==
345 RNDIS_MSG_QUERY && request->request_msg.msg.
346 query_req.oid == RNDIS_OID_GEN_MEDIA_CONNECT_STATUS)
347 rndis_set_link_state(dev, request);
348 } else {
349 netdev_err(ndev,
350 "rndis response buffer overflow "
351 "detected (size %u max %zu)\n",
352 resp->msg_len,
353 sizeof(struct rndis_message));
354
355 if (resp->ndis_msg_type ==
356 RNDIS_MSG_RESET_C) {
357 /* does not have a request id field */
358 request->response_msg.msg.reset_complete.
359 status = RNDIS_STATUS_BUFFER_OVERFLOW;
360 } else {
361 request->response_msg.msg.
362 init_complete.status =
363 RNDIS_STATUS_BUFFER_OVERFLOW;
364 }
365 }
366
367 netvsc_dma_unmap(((struct net_device_context *)
368 netdev_priv(ndev))->device_ctx, &request->pkt);
369 complete(&request->wait_event);
370 } else {
371 netdev_err(ndev,
372 "no rndis request found for this response "
373 "(id 0x%x res type 0x%x)\n",
374 *req_id,
375 resp->ndis_msg_type);
376 }
377 }
378
379 /*
380 * Get the Per-Packet-Info with the specified type
381 * return NULL if not found.
382 */
rndis_get_ppi(struct net_device * ndev,struct rndis_packet * rpkt,u32 rpkt_len,u32 type,u8 internal,u32 ppi_size,void * data)383 static inline void *rndis_get_ppi(struct net_device *ndev,
384 struct rndis_packet *rpkt,
385 u32 rpkt_len, u32 type, u8 internal,
386 u32 ppi_size, void *data)
387 {
388 struct rndis_per_packet_info *ppi;
389 int len;
390
391 if (rpkt->per_pkt_info_offset == 0)
392 return NULL;
393
394 /* Validate info_offset and info_len */
395 if (rpkt->per_pkt_info_offset < sizeof(struct rndis_packet) ||
396 rpkt->per_pkt_info_offset > rpkt_len) {
397 netdev_err(ndev, "Invalid per_pkt_info_offset: %u\n",
398 rpkt->per_pkt_info_offset);
399 return NULL;
400 }
401
402 if (rpkt->per_pkt_info_len < sizeof(*ppi) ||
403 rpkt->per_pkt_info_len > rpkt_len - rpkt->per_pkt_info_offset) {
404 netdev_err(ndev, "Invalid per_pkt_info_len: %u\n",
405 rpkt->per_pkt_info_len);
406 return NULL;
407 }
408
409 ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
410 rpkt->per_pkt_info_offset);
411 /* Copy the PPIs into nvchan->recv_buf */
412 memcpy(ppi, data + RNDIS_HEADER_SIZE + rpkt->per_pkt_info_offset, rpkt->per_pkt_info_len);
413 len = rpkt->per_pkt_info_len;
414
415 while (len > 0) {
416 /* Validate ppi_offset and ppi_size */
417 if (ppi->size > len) {
418 netdev_err(ndev, "Invalid ppi size: %u\n", ppi->size);
419 continue;
420 }
421
422 if (ppi->ppi_offset >= ppi->size) {
423 netdev_err(ndev, "Invalid ppi_offset: %u\n", ppi->ppi_offset);
424 continue;
425 }
426
427 if (ppi->type == type && ppi->internal == internal) {
428 /* ppi->size should be big enough to hold the returned object. */
429 if (ppi->size - ppi->ppi_offset < ppi_size) {
430 netdev_err(ndev, "Invalid ppi: size %u ppi_offset %u\n",
431 ppi->size, ppi->ppi_offset);
432 continue;
433 }
434 return (void *)((ulong)ppi + ppi->ppi_offset);
435 }
436 len -= ppi->size;
437 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
438 }
439
440 return NULL;
441 }
442
443 static inline
rsc_add_data(struct netvsc_channel * nvchan,const struct ndis_pkt_8021q_info * vlan,const struct ndis_tcp_ip_checksum_info * csum_info,const u32 * hash_info,void * data,u32 len)444 void rsc_add_data(struct netvsc_channel *nvchan,
445 const struct ndis_pkt_8021q_info *vlan,
446 const struct ndis_tcp_ip_checksum_info *csum_info,
447 const u32 *hash_info,
448 void *data, u32 len)
449 {
450 u32 cnt = nvchan->rsc.cnt;
451
452 if (cnt) {
453 nvchan->rsc.pktlen += len;
454 } else {
455 /* The data/values pointed by vlan, csum_info and hash_info are shared
456 * across the different 'fragments' of the RSC packet; store them into
457 * the packet itself.
458 */
459 if (vlan != NULL) {
460 memcpy(&nvchan->rsc.vlan, vlan, sizeof(*vlan));
461 nvchan->rsc.ppi_flags |= NVSC_RSC_VLAN;
462 } else {
463 nvchan->rsc.ppi_flags &= ~NVSC_RSC_VLAN;
464 }
465 if (csum_info != NULL) {
466 memcpy(&nvchan->rsc.csum_info, csum_info, sizeof(*csum_info));
467 nvchan->rsc.ppi_flags |= NVSC_RSC_CSUM_INFO;
468 } else {
469 nvchan->rsc.ppi_flags &= ~NVSC_RSC_CSUM_INFO;
470 }
471 nvchan->rsc.pktlen = len;
472 if (hash_info != NULL) {
473 nvchan->rsc.hash_info = *hash_info;
474 nvchan->rsc.ppi_flags |= NVSC_RSC_HASH_INFO;
475 } else {
476 nvchan->rsc.ppi_flags &= ~NVSC_RSC_HASH_INFO;
477 }
478 }
479
480 nvchan->rsc.data[cnt] = data;
481 nvchan->rsc.len[cnt] = len;
482 nvchan->rsc.cnt++;
483 }
484
rndis_filter_receive_data(struct net_device * ndev,struct netvsc_device * nvdev,struct netvsc_channel * nvchan,struct rndis_message * msg,void * data,u32 data_buflen)485 static int rndis_filter_receive_data(struct net_device *ndev,
486 struct netvsc_device *nvdev,
487 struct netvsc_channel *nvchan,
488 struct rndis_message *msg,
489 void *data, u32 data_buflen)
490 {
491 struct rndis_packet *rndis_pkt = &msg->msg.pkt;
492 const struct ndis_tcp_ip_checksum_info *csum_info;
493 const struct ndis_pkt_8021q_info *vlan;
494 const struct rndis_pktinfo_id *pktinfo_id;
495 const u32 *hash_info;
496 u32 data_offset, rpkt_len;
497 bool rsc_more = false;
498 int ret;
499
500 /* Ensure data_buflen is big enough to read header fields */
501 if (data_buflen < RNDIS_HEADER_SIZE + sizeof(struct rndis_packet)) {
502 netdev_err(ndev, "invalid rndis pkt, data_buflen too small: %u\n",
503 data_buflen);
504 return NVSP_STAT_FAIL;
505 }
506
507 /* Copy the RNDIS packet into nvchan->recv_buf */
508 memcpy(rndis_pkt, data + RNDIS_HEADER_SIZE, sizeof(*rndis_pkt));
509
510 /* Validate rndis_pkt offset */
511 if (rndis_pkt->data_offset >= data_buflen - RNDIS_HEADER_SIZE) {
512 netdev_err(ndev, "invalid rndis packet offset: %u\n",
513 rndis_pkt->data_offset);
514 return NVSP_STAT_FAIL;
515 }
516
517 /* Remove the rndis header and pass it back up the stack */
518 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
519
520 rpkt_len = data_buflen - RNDIS_HEADER_SIZE;
521 data_buflen -= data_offset;
522
523 /*
524 * Make sure we got a valid RNDIS message, now total_data_buflen
525 * should be the data packet size plus the trailer padding size
526 */
527 if (unlikely(data_buflen < rndis_pkt->data_len)) {
528 netdev_err(ndev, "rndis message buffer "
529 "overflow detected (got %u, min %u)"
530 "...dropping this message!\n",
531 data_buflen, rndis_pkt->data_len);
532 return NVSP_STAT_FAIL;
533 }
534
535 vlan = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, IEEE_8021Q_INFO, 0, sizeof(*vlan),
536 data);
537
538 csum_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, TCPIP_CHKSUM_PKTINFO, 0,
539 sizeof(*csum_info), data);
540
541 hash_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, NBL_HASH_VALUE, 0,
542 sizeof(*hash_info), data);
543
544 pktinfo_id = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, RNDIS_PKTINFO_ID, 1,
545 sizeof(*pktinfo_id), data);
546
547 /* Identify RSC frags, drop erroneous packets */
548 if (pktinfo_id && (pktinfo_id->flag & RNDIS_PKTINFO_SUBALLOC)) {
549 if (pktinfo_id->flag & RNDIS_PKTINFO_1ST_FRAG)
550 nvchan->rsc.cnt = 0;
551 else if (nvchan->rsc.cnt == 0)
552 goto drop;
553
554 rsc_more = true;
555
556 if (pktinfo_id->flag & RNDIS_PKTINFO_LAST_FRAG)
557 rsc_more = false;
558
559 if (rsc_more && nvchan->rsc.is_last)
560 goto drop;
561 } else {
562 nvchan->rsc.cnt = 0;
563 }
564
565 if (unlikely(nvchan->rsc.cnt >= NVSP_RSC_MAX))
566 goto drop;
567
568 /* Put data into per channel structure.
569 * Also, remove the rndis trailer padding from rndis packet message
570 * rndis_pkt->data_len tell us the real data length, we only copy
571 * the data packet to the stack, without the rndis trailer padding
572 */
573 rsc_add_data(nvchan, vlan, csum_info, hash_info,
574 data + data_offset, rndis_pkt->data_len);
575
576 if (rsc_more)
577 return NVSP_STAT_SUCCESS;
578
579 ret = netvsc_recv_callback(ndev, nvdev, nvchan);
580 nvchan->rsc.cnt = 0;
581
582 return ret;
583
584 drop:
585 return NVSP_STAT_FAIL;
586 }
587
rndis_filter_receive(struct net_device * ndev,struct netvsc_device * net_dev,struct netvsc_channel * nvchan,void * data,u32 buflen)588 int rndis_filter_receive(struct net_device *ndev,
589 struct netvsc_device *net_dev,
590 struct netvsc_channel *nvchan,
591 void *data, u32 buflen)
592 {
593 struct net_device_context *net_device_ctx = netdev_priv(ndev);
594 struct rndis_message *rndis_msg = nvchan->recv_buf;
595
596 if (buflen < RNDIS_HEADER_SIZE) {
597 netdev_err(ndev, "Invalid rndis_msg (buflen: %u)\n", buflen);
598 return NVSP_STAT_FAIL;
599 }
600
601 /* Copy the RNDIS msg header into nvchan->recv_buf */
602 memcpy(rndis_msg, data, RNDIS_HEADER_SIZE);
603
604 /* Validate incoming rndis_message packet */
605 if (rndis_msg->msg_len < RNDIS_HEADER_SIZE ||
606 buflen < rndis_msg->msg_len) {
607 netdev_err(ndev, "Invalid rndis_msg (buflen: %u, msg_len: %u)\n",
608 buflen, rndis_msg->msg_len);
609 return NVSP_STAT_FAIL;
610 }
611
612 if (netif_msg_rx_status(net_device_ctx))
613 dump_rndis_message(ndev, rndis_msg, data);
614
615 switch (rndis_msg->ndis_msg_type) {
616 case RNDIS_MSG_PACKET:
617 return rndis_filter_receive_data(ndev, net_dev, nvchan,
618 rndis_msg, data, buflen);
619 case RNDIS_MSG_INIT_C:
620 case RNDIS_MSG_QUERY_C:
621 case RNDIS_MSG_SET_C:
622 /* completion msgs */
623 rndis_filter_receive_response(ndev, net_dev, rndis_msg, data);
624 break;
625
626 case RNDIS_MSG_INDICATE:
627 /* notification msgs */
628 netvsc_linkstatus_callback(ndev, rndis_msg, data, buflen);
629 break;
630 default:
631 netdev_err(ndev,
632 "unhandled rndis message (type %u len %u)\n",
633 rndis_msg->ndis_msg_type,
634 rndis_msg->msg_len);
635 return NVSP_STAT_FAIL;
636 }
637
638 return NVSP_STAT_SUCCESS;
639 }
640
rndis_filter_query_device(struct rndis_device * dev,struct netvsc_device * nvdev,u32 oid,void * result,u32 * result_size)641 static int rndis_filter_query_device(struct rndis_device *dev,
642 struct netvsc_device *nvdev,
643 u32 oid, void *result, u32 *result_size)
644 {
645 struct rndis_request *request;
646 u32 inresult_size = *result_size;
647 struct rndis_query_request *query;
648 struct rndis_query_complete *query_complete;
649 u32 msg_len;
650 int ret = 0;
651
652 if (!result)
653 return -EINVAL;
654
655 *result_size = 0;
656 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
657 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
658 if (!request) {
659 ret = -ENOMEM;
660 goto cleanup;
661 }
662
663 /* Setup the rndis query */
664 query = &request->request_msg.msg.query_req;
665 query->oid = oid;
666 query->info_buf_offset = sizeof(struct rndis_query_request);
667 query->info_buflen = 0;
668 query->dev_vc_handle = 0;
669
670 if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) {
671 struct ndis_offload *hwcaps;
672 u32 nvsp_version = nvdev->nvsp_version;
673 u8 ndis_rev;
674 size_t size;
675
676 if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) {
677 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
678 size = NDIS_OFFLOAD_SIZE;
679 } else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) {
680 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2;
681 size = NDIS_OFFLOAD_SIZE_6_1;
682 } else {
683 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1;
684 size = NDIS_OFFLOAD_SIZE_6_0;
685 }
686
687 request->request_msg.msg_len += size;
688 query->info_buflen = size;
689 hwcaps = (struct ndis_offload *)
690 ((unsigned long)query + query->info_buf_offset);
691
692 hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD;
693 hwcaps->header.revision = ndis_rev;
694 hwcaps->header.size = size;
695
696 } else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
697 struct ndis_recv_scale_cap *cap;
698
699 request->request_msg.msg_len +=
700 sizeof(struct ndis_recv_scale_cap);
701 query->info_buflen = sizeof(struct ndis_recv_scale_cap);
702 cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
703 query->info_buf_offset);
704 cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
705 cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
706 cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
707 }
708
709 ret = rndis_filter_send_request(dev, request);
710 if (ret != 0)
711 goto cleanup;
712
713 wait_for_completion(&request->wait_event);
714
715 /* Copy the response back */
716 query_complete = &request->response_msg.msg.query_complete;
717 msg_len = request->response_msg.msg_len;
718
719 /* Ensure the packet is big enough to access its fields */
720 if (msg_len - RNDIS_HEADER_SIZE < sizeof(struct rndis_query_complete)) {
721 ret = -1;
722 goto cleanup;
723 }
724
725 if (query_complete->info_buflen > inresult_size ||
726 query_complete->info_buf_offset < sizeof(*query_complete) ||
727 msg_len - RNDIS_HEADER_SIZE < query_complete->info_buf_offset ||
728 msg_len - RNDIS_HEADER_SIZE - query_complete->info_buf_offset
729 < query_complete->info_buflen) {
730 ret = -1;
731 goto cleanup;
732 }
733
734 memcpy(result,
735 (void *)((unsigned long)query_complete +
736 query_complete->info_buf_offset),
737 query_complete->info_buflen);
738
739 *result_size = query_complete->info_buflen;
740
741 cleanup:
742 if (request)
743 put_rndis_request(dev, request);
744
745 return ret;
746 }
747
748 /* Get the hardware offload capabilities */
749 static int
rndis_query_hwcaps(struct rndis_device * dev,struct netvsc_device * net_device,struct ndis_offload * caps)750 rndis_query_hwcaps(struct rndis_device *dev, struct netvsc_device *net_device,
751 struct ndis_offload *caps)
752 {
753 u32 caps_len = sizeof(*caps);
754 int ret;
755
756 memset(caps, 0, sizeof(*caps));
757
758 ret = rndis_filter_query_device(dev, net_device,
759 OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
760 caps, &caps_len);
761 if (ret)
762 return ret;
763
764 if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) {
765 netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n",
766 caps->header.type);
767 return -EINVAL;
768 }
769
770 if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) {
771 netdev_warn(dev->ndev, "invalid NDIS objrev %x\n",
772 caps->header.revision);
773 return -EINVAL;
774 }
775
776 if (caps->header.size > caps_len ||
777 caps->header.size < NDIS_OFFLOAD_SIZE_6_0) {
778 netdev_warn(dev->ndev,
779 "invalid NDIS objsize %u, data size %u\n",
780 caps->header.size, caps_len);
781 return -EINVAL;
782 }
783
784 return 0;
785 }
786
rndis_filter_query_device_mac(struct rndis_device * dev,struct netvsc_device * net_device)787 static int rndis_filter_query_device_mac(struct rndis_device *dev,
788 struct netvsc_device *net_device)
789 {
790 u32 size = ETH_ALEN;
791
792 return rndis_filter_query_device(dev, net_device,
793 RNDIS_OID_802_3_PERMANENT_ADDRESS,
794 dev->hw_mac_adr, &size);
795 }
796
797 #define NWADR_STR "NetworkAddress"
798 #define NWADR_STRLEN 14
799
rndis_filter_set_device_mac(struct netvsc_device * nvdev,const char * mac)800 int rndis_filter_set_device_mac(struct netvsc_device *nvdev,
801 const char *mac)
802 {
803 struct rndis_device *rdev = nvdev->extension;
804 struct rndis_request *request;
805 struct rndis_set_request *set;
806 struct rndis_config_parameter_info *cpi;
807 wchar_t *cfg_nwadr, *cfg_mac;
808 struct rndis_set_complete *set_complete;
809 char macstr[2*ETH_ALEN+1];
810 u32 extlen = sizeof(struct rndis_config_parameter_info) +
811 2*NWADR_STRLEN + 4*ETH_ALEN;
812 int ret;
813
814 request = get_rndis_request(rdev, RNDIS_MSG_SET,
815 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
816 if (!request)
817 return -ENOMEM;
818
819 set = &request->request_msg.msg.set_req;
820 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
821 set->info_buflen = extlen;
822 set->info_buf_offset = sizeof(struct rndis_set_request);
823 set->dev_vc_handle = 0;
824
825 cpi = (struct rndis_config_parameter_info *)((ulong)set +
826 set->info_buf_offset);
827 cpi->parameter_name_offset =
828 sizeof(struct rndis_config_parameter_info);
829 /* Multiply by 2 because host needs 2 bytes (utf16) for each char */
830 cpi->parameter_name_length = 2*NWADR_STRLEN;
831 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
832 cpi->parameter_value_offset =
833 cpi->parameter_name_offset + cpi->parameter_name_length;
834 /* Multiply by 4 because each MAC byte displayed as 2 utf16 chars */
835 cpi->parameter_value_length = 4*ETH_ALEN;
836
837 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
838 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
839 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
840 cfg_nwadr, NWADR_STRLEN);
841 if (ret < 0)
842 goto cleanup;
843 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
844 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
845 cfg_mac, 2*ETH_ALEN);
846 if (ret < 0)
847 goto cleanup;
848
849 ret = rndis_filter_send_request(rdev, request);
850 if (ret != 0)
851 goto cleanup;
852
853 wait_for_completion(&request->wait_event);
854
855 set_complete = &request->response_msg.msg.set_complete;
856 if (set_complete->status != RNDIS_STATUS_SUCCESS)
857 ret = -EIO;
858
859 cleanup:
860 put_rndis_request(rdev, request);
861 return ret;
862 }
863
864 int
rndis_filter_set_offload_params(struct net_device * ndev,struct netvsc_device * nvdev,struct ndis_offload_params * req_offloads)865 rndis_filter_set_offload_params(struct net_device *ndev,
866 struct netvsc_device *nvdev,
867 struct ndis_offload_params *req_offloads)
868 {
869 struct rndis_device *rdev = nvdev->extension;
870 struct rndis_request *request;
871 struct rndis_set_request *set;
872 struct ndis_offload_params *offload_params;
873 struct rndis_set_complete *set_complete;
874 u32 extlen = sizeof(struct ndis_offload_params);
875 int ret;
876 u32 vsp_version = nvdev->nvsp_version;
877
878 if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
879 extlen = VERSION_4_OFFLOAD_SIZE;
880 /* On NVSP_PROTOCOL_VERSION_4 and below, we do not support
881 * UDP checksum offload.
882 */
883 req_offloads->udp_ip_v4_csum = 0;
884 req_offloads->udp_ip_v6_csum = 0;
885 }
886
887 request = get_rndis_request(rdev, RNDIS_MSG_SET,
888 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
889 if (!request)
890 return -ENOMEM;
891
892 set = &request->request_msg.msg.set_req;
893 set->oid = OID_TCP_OFFLOAD_PARAMETERS;
894 set->info_buflen = extlen;
895 set->info_buf_offset = sizeof(struct rndis_set_request);
896 set->dev_vc_handle = 0;
897
898 offload_params = (struct ndis_offload_params *)((ulong)set +
899 set->info_buf_offset);
900 *offload_params = *req_offloads;
901 offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
902 offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
903 offload_params->header.size = extlen;
904
905 ret = rndis_filter_send_request(rdev, request);
906 if (ret != 0)
907 goto cleanup;
908
909 wait_for_completion(&request->wait_event);
910 set_complete = &request->response_msg.msg.set_complete;
911 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
912 netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
913 set_complete->status);
914 ret = -EINVAL;
915 }
916
917 cleanup:
918 put_rndis_request(rdev, request);
919 return ret;
920 }
921
rndis_set_rss_param_msg(struct rndis_device * rdev,const u8 * rss_key,u16 flag)922 static int rndis_set_rss_param_msg(struct rndis_device *rdev,
923 const u8 *rss_key, u16 flag)
924 {
925 struct net_device *ndev = rdev->ndev;
926 struct net_device_context *ndc = netdev_priv(ndev);
927 struct rndis_request *request;
928 struct rndis_set_request *set;
929 struct rndis_set_complete *set_complete;
930 u32 extlen = sizeof(struct ndis_recv_scale_param) +
931 4 * ndc->rx_table_sz + NETVSC_HASH_KEYLEN;
932 struct ndis_recv_scale_param *rssp;
933 u32 *itab;
934 u8 *keyp;
935 int i, ret;
936
937 request = get_rndis_request(
938 rdev, RNDIS_MSG_SET,
939 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
940 if (!request)
941 return -ENOMEM;
942
943 set = &request->request_msg.msg.set_req;
944 set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
945 set->info_buflen = extlen;
946 set->info_buf_offset = sizeof(struct rndis_set_request);
947 set->dev_vc_handle = 0;
948
949 rssp = (struct ndis_recv_scale_param *)(set + 1);
950 rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
951 rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
952 rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
953 rssp->flag = flag;
954 rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
955 NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
956 NDIS_HASH_TCP_IPV6;
957 rssp->indirect_tabsize = 4 * ndc->rx_table_sz;
958 rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
959 rssp->hashkey_size = NETVSC_HASH_KEYLEN;
960 rssp->hashkey_offset = rssp->indirect_taboffset +
961 rssp->indirect_tabsize;
962
963 /* Set indirection table entries */
964 itab = (u32 *)(rssp + 1);
965 for (i = 0; i < ndc->rx_table_sz; i++)
966 itab[i] = ndc->rx_table[i];
967
968 /* Set hask key values */
969 keyp = (u8 *)((unsigned long)rssp + rssp->hashkey_offset);
970 memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
971
972 ret = rndis_filter_send_request(rdev, request);
973 if (ret != 0)
974 goto cleanup;
975
976 wait_for_completion(&request->wait_event);
977 set_complete = &request->response_msg.msg.set_complete;
978 if (set_complete->status == RNDIS_STATUS_SUCCESS) {
979 if (!(flag & NDIS_RSS_PARAM_FLAG_DISABLE_RSS) &&
980 !(flag & NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED))
981 memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
982
983 } else {
984 netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
985 set_complete->status);
986 ret = -EINVAL;
987 }
988
989 cleanup:
990 put_rndis_request(rdev, request);
991 return ret;
992 }
993
rndis_filter_set_rss_param(struct rndis_device * rdev,const u8 * rss_key)994 int rndis_filter_set_rss_param(struct rndis_device *rdev,
995 const u8 *rss_key)
996 {
997 /* Disable RSS before change */
998 rndis_set_rss_param_msg(rdev, rss_key,
999 NDIS_RSS_PARAM_FLAG_DISABLE_RSS);
1000
1001 return rndis_set_rss_param_msg(rdev, rss_key, 0);
1002 }
1003
rndis_filter_query_device_link_status(struct rndis_device * dev,struct netvsc_device * net_device)1004 static int rndis_filter_query_device_link_status(struct rndis_device *dev,
1005 struct netvsc_device *net_device)
1006 {
1007 u32 size = sizeof(u32);
1008 u32 link_status;
1009
1010 return rndis_filter_query_device(dev, net_device,
1011 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
1012 &link_status, &size);
1013 }
1014
rndis_filter_query_link_speed(struct rndis_device * dev,struct netvsc_device * net_device)1015 static int rndis_filter_query_link_speed(struct rndis_device *dev,
1016 struct netvsc_device *net_device)
1017 {
1018 u32 size = sizeof(u32);
1019 u32 link_speed;
1020 struct net_device_context *ndc;
1021 int ret;
1022
1023 ret = rndis_filter_query_device(dev, net_device,
1024 RNDIS_OID_GEN_LINK_SPEED,
1025 &link_speed, &size);
1026
1027 if (!ret) {
1028 ndc = netdev_priv(dev->ndev);
1029
1030 /* The link speed reported from host is in 100bps unit, so
1031 * we convert it to Mbps here.
1032 */
1033 ndc->speed = link_speed / 10000;
1034 }
1035
1036 return ret;
1037 }
1038
rndis_filter_set_packet_filter(struct rndis_device * dev,u32 new_filter)1039 static int rndis_filter_set_packet_filter(struct rndis_device *dev,
1040 u32 new_filter)
1041 {
1042 struct rndis_request *request;
1043 struct rndis_set_request *set;
1044 int ret;
1045
1046 if (dev->filter == new_filter)
1047 return 0;
1048
1049 request = get_rndis_request(dev, RNDIS_MSG_SET,
1050 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
1051 sizeof(u32));
1052 if (!request)
1053 return -ENOMEM;
1054
1055 /* Setup the rndis set */
1056 set = &request->request_msg.msg.set_req;
1057 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
1058 set->info_buflen = sizeof(u32);
1059 set->info_buf_offset = offsetof(typeof(*set), info_buf);
1060 memcpy(set->info_buf, &new_filter, sizeof(u32));
1061
1062 ret = rndis_filter_send_request(dev, request);
1063 if (ret == 0) {
1064 wait_for_completion(&request->wait_event);
1065 dev->filter = new_filter;
1066 }
1067
1068 put_rndis_request(dev, request);
1069
1070 return ret;
1071 }
1072
rndis_set_multicast(struct work_struct * w)1073 static void rndis_set_multicast(struct work_struct *w)
1074 {
1075 struct rndis_device *rdev
1076 = container_of(w, struct rndis_device, mcast_work);
1077 u32 filter = NDIS_PACKET_TYPE_DIRECTED;
1078 unsigned int flags = rdev->ndev->flags;
1079
1080 if (flags & IFF_PROMISC) {
1081 filter = NDIS_PACKET_TYPE_PROMISCUOUS;
1082 } else {
1083 if (!netdev_mc_empty(rdev->ndev) || (flags & IFF_ALLMULTI))
1084 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
1085 if (flags & IFF_BROADCAST)
1086 filter |= NDIS_PACKET_TYPE_BROADCAST;
1087 }
1088
1089 rndis_filter_set_packet_filter(rdev, filter);
1090 }
1091
rndis_filter_update(struct netvsc_device * nvdev)1092 void rndis_filter_update(struct netvsc_device *nvdev)
1093 {
1094 struct rndis_device *rdev = nvdev->extension;
1095
1096 schedule_work(&rdev->mcast_work);
1097 }
1098
rndis_filter_init_device(struct rndis_device * dev,struct netvsc_device * nvdev)1099 static int rndis_filter_init_device(struct rndis_device *dev,
1100 struct netvsc_device *nvdev)
1101 {
1102 struct rndis_request *request;
1103 struct rndis_initialize_request *init;
1104 struct rndis_initialize_complete *init_complete;
1105 u32 status;
1106 int ret;
1107
1108 request = get_rndis_request(dev, RNDIS_MSG_INIT,
1109 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
1110 if (!request) {
1111 ret = -ENOMEM;
1112 goto cleanup;
1113 }
1114
1115 /* Setup the rndis set */
1116 init = &request->request_msg.msg.init_req;
1117 init->major_ver = RNDIS_MAJOR_VERSION;
1118 init->minor_ver = RNDIS_MINOR_VERSION;
1119 init->max_xfer_size = 0x4000;
1120
1121 dev->state = RNDIS_DEV_INITIALIZING;
1122
1123 ret = rndis_filter_send_request(dev, request);
1124 if (ret != 0) {
1125 dev->state = RNDIS_DEV_UNINITIALIZED;
1126 goto cleanup;
1127 }
1128
1129 wait_for_completion(&request->wait_event);
1130
1131 init_complete = &request->response_msg.msg.init_complete;
1132 status = init_complete->status;
1133 if (status == RNDIS_STATUS_SUCCESS) {
1134 dev->state = RNDIS_DEV_INITIALIZED;
1135 nvdev->max_pkt = init_complete->max_pkt_per_msg;
1136 nvdev->pkt_align = 1 << init_complete->pkt_alignment_factor;
1137 ret = 0;
1138 } else {
1139 dev->state = RNDIS_DEV_UNINITIALIZED;
1140 ret = -EINVAL;
1141 }
1142
1143 cleanup:
1144 if (request)
1145 put_rndis_request(dev, request);
1146
1147 return ret;
1148 }
1149
netvsc_device_idle(const struct netvsc_device * nvdev)1150 static bool netvsc_device_idle(const struct netvsc_device *nvdev)
1151 {
1152 int i;
1153
1154 for (i = 0; i < nvdev->num_chn; i++) {
1155 const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
1156
1157 if (nvchan->mrc.first != nvchan->mrc.next)
1158 return false;
1159
1160 if (atomic_read(&nvchan->queue_sends) > 0)
1161 return false;
1162 }
1163
1164 return true;
1165 }
1166
rndis_filter_halt_device(struct netvsc_device * nvdev,struct rndis_device * dev)1167 static void rndis_filter_halt_device(struct netvsc_device *nvdev,
1168 struct rndis_device *dev)
1169 {
1170 struct rndis_request *request;
1171 struct rndis_halt_request *halt;
1172
1173 /* Attempt to do a rndis device halt */
1174 request = get_rndis_request(dev, RNDIS_MSG_HALT,
1175 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
1176 if (!request)
1177 goto cleanup;
1178
1179 /* Setup the rndis set */
1180 halt = &request->request_msg.msg.halt_req;
1181 halt->req_id = atomic_inc_return(&dev->new_req_id);
1182
1183 /* Ignore return since this msg is optional. */
1184 rndis_filter_send_request(dev, request);
1185
1186 dev->state = RNDIS_DEV_UNINITIALIZED;
1187
1188 cleanup:
1189 nvdev->destroy = true;
1190
1191 /* Force flag to be ordered before waiting */
1192 wmb();
1193
1194 /* Wait for all send completions */
1195 wait_event(nvdev->wait_drain, netvsc_device_idle(nvdev));
1196
1197 if (request)
1198 put_rndis_request(dev, request);
1199 }
1200
rndis_filter_open_device(struct rndis_device * dev)1201 static int rndis_filter_open_device(struct rndis_device *dev)
1202 {
1203 int ret;
1204
1205 if (dev->state != RNDIS_DEV_INITIALIZED)
1206 return 0;
1207
1208 ret = rndis_filter_set_packet_filter(dev,
1209 NDIS_PACKET_TYPE_BROADCAST |
1210 NDIS_PACKET_TYPE_ALL_MULTICAST |
1211 NDIS_PACKET_TYPE_DIRECTED);
1212 if (ret == 0)
1213 dev->state = RNDIS_DEV_DATAINITIALIZED;
1214
1215 return ret;
1216 }
1217
rndis_filter_close_device(struct rndis_device * dev)1218 static int rndis_filter_close_device(struct rndis_device *dev)
1219 {
1220 int ret;
1221
1222 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
1223 return 0;
1224
1225 /* Make sure rndis_set_multicast doesn't re-enable filter! */
1226 cancel_work_sync(&dev->mcast_work);
1227
1228 ret = rndis_filter_set_packet_filter(dev, 0);
1229 if (ret == -ENODEV)
1230 ret = 0;
1231
1232 if (ret == 0)
1233 dev->state = RNDIS_DEV_INITIALIZED;
1234
1235 return ret;
1236 }
1237
netvsc_sc_open(struct vmbus_channel * new_sc)1238 static void netvsc_sc_open(struct vmbus_channel *new_sc)
1239 {
1240 struct net_device *ndev =
1241 hv_get_drvdata(new_sc->primary_channel->device_obj);
1242 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1243 struct netvsc_device *nvscdev;
1244 u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
1245 struct netvsc_channel *nvchan;
1246 int ret;
1247
1248 /* This is safe because this callback only happens when
1249 * new device is being setup and waiting on the channel_init_wait.
1250 */
1251 nvscdev = rcu_dereference_raw(ndev_ctx->nvdev);
1252 if (!nvscdev || chn_index >= nvscdev->num_chn)
1253 return;
1254
1255 nvchan = nvscdev->chan_table + chn_index;
1256
1257 /* Because the device uses NAPI, all the interrupt batching and
1258 * control is done via Net softirq, not the channel handling
1259 */
1260 set_channel_read_mode(new_sc, HV_CALL_ISR);
1261
1262 /* Set the channel before opening.*/
1263 nvchan->channel = new_sc;
1264
1265 new_sc->next_request_id_callback = vmbus_next_request_id;
1266 new_sc->request_addr_callback = vmbus_request_addr;
1267 new_sc->rqstor_size = netvsc_rqstor_size(netvsc_ring_bytes);
1268 new_sc->max_pkt_size = NETVSC_MAX_PKT_SIZE;
1269
1270 ret = vmbus_open(new_sc, netvsc_ring_bytes,
1271 netvsc_ring_bytes, NULL, 0,
1272 netvsc_channel_cb, nvchan);
1273 if (ret == 0)
1274 napi_enable(&nvchan->napi);
1275 else
1276 netdev_notice(ndev, "sub channel open failed: %d\n", ret);
1277
1278 if (atomic_inc_return(&nvscdev->open_chn) == nvscdev->num_chn)
1279 wake_up(&nvscdev->subchan_open);
1280 }
1281
1282 /* Open sub-channels after completing the handling of the device probe.
1283 * This breaks overlap of processing the host message for the
1284 * new primary channel with the initialization of sub-channels.
1285 */
rndis_set_subchannel(struct net_device * ndev,struct netvsc_device * nvdev,struct netvsc_device_info * dev_info)1286 int rndis_set_subchannel(struct net_device *ndev,
1287 struct netvsc_device *nvdev,
1288 struct netvsc_device_info *dev_info)
1289 {
1290 struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
1291 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1292 struct hv_device *hv_dev = ndev_ctx->device_ctx;
1293 struct rndis_device *rdev = nvdev->extension;
1294 int i, ret;
1295
1296 ASSERT_RTNL();
1297
1298 memset(init_packet, 0, sizeof(struct nvsp_message));
1299 init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
1300 init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
1301 init_packet->msg.v5_msg.subchn_req.num_subchannels =
1302 nvdev->num_chn - 1;
1303 trace_nvsp_send(ndev, init_packet);
1304
1305 ret = vmbus_sendpacket(hv_dev->channel, init_packet,
1306 sizeof(struct nvsp_message),
1307 (unsigned long)init_packet,
1308 VM_PKT_DATA_INBAND,
1309 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
1310 if (ret) {
1311 netdev_err(ndev, "sub channel allocate send failed: %d\n", ret);
1312 return ret;
1313 }
1314
1315 wait_for_completion(&nvdev->channel_init_wait);
1316 if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
1317 netdev_err(ndev, "sub channel request failed\n");
1318 return -EIO;
1319 }
1320
1321 /* Check that number of allocated sub channel is within the expected range */
1322 if (init_packet->msg.v5_msg.subchn_comp.num_subchannels > nvdev->num_chn - 1) {
1323 netdev_err(ndev, "invalid number of allocated sub channel\n");
1324 return -EINVAL;
1325 }
1326 nvdev->num_chn = 1 +
1327 init_packet->msg.v5_msg.subchn_comp.num_subchannels;
1328
1329 /* wait for all sub channels to open */
1330 wait_event(nvdev->subchan_open,
1331 atomic_read(&nvdev->open_chn) == nvdev->num_chn);
1332
1333 for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
1334 ndev_ctx->tx_table[i] = i % nvdev->num_chn;
1335
1336 /* ignore failures from setting rss parameters, still have channels */
1337 if (dev_info)
1338 rndis_filter_set_rss_param(rdev, dev_info->rss_key);
1339 else
1340 rndis_filter_set_rss_param(rdev, netvsc_hash_key);
1341
1342 netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
1343 netif_set_real_num_rx_queues(ndev, nvdev->num_chn);
1344
1345 return 0;
1346 }
1347
rndis_netdev_set_hwcaps(struct rndis_device * rndis_device,struct netvsc_device * nvdev)1348 static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
1349 struct netvsc_device *nvdev)
1350 {
1351 struct net_device *net = rndis_device->ndev;
1352 struct net_device_context *net_device_ctx = netdev_priv(net);
1353 struct ndis_offload hwcaps;
1354 struct ndis_offload_params offloads;
1355 unsigned int gso_max_size = GSO_LEGACY_MAX_SIZE;
1356 int ret;
1357
1358 /* Find HW offload capabilities */
1359 ret = rndis_query_hwcaps(rndis_device, nvdev, &hwcaps);
1360 if (ret != 0)
1361 return ret;
1362
1363 /* A value of zero means "no change"; now turn on what we want. */
1364 memset(&offloads, 0, sizeof(struct ndis_offload_params));
1365
1366 /* Linux does not care about IP checksum, always does in kernel */
1367 offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED;
1368
1369 /* Reset previously set hw_features flags */
1370 net->hw_features &= ~NETVSC_SUPPORTED_HW_FEATURES;
1371 net_device_ctx->tx_checksum_mask = 0;
1372
1373 /* Compute tx offload settings based on hw capabilities */
1374 net->hw_features |= NETIF_F_RXCSUM;
1375 net->hw_features |= NETIF_F_SG;
1376 net->hw_features |= NETIF_F_RXHASH;
1377
1378 if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
1379 /* Can checksum TCP */
1380 net->hw_features |= NETIF_F_IP_CSUM;
1381 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP;
1382
1383 offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1384
1385 if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) {
1386 offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1387 net->hw_features |= NETIF_F_TSO;
1388
1389 if (hwcaps.lsov2.ip4_maxsz < gso_max_size)
1390 gso_max_size = hwcaps.lsov2.ip4_maxsz;
1391 }
1392
1393 if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) {
1394 offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1395 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP;
1396 }
1397 }
1398
1399 if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) {
1400 net->hw_features |= NETIF_F_IPV6_CSUM;
1401
1402 offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1403 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP;
1404
1405 if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) &&
1406 (hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) {
1407 offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1408 net->hw_features |= NETIF_F_TSO6;
1409
1410 if (hwcaps.lsov2.ip6_maxsz < gso_max_size)
1411 gso_max_size = hwcaps.lsov2.ip6_maxsz;
1412 }
1413
1414 if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) {
1415 offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1416 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP;
1417 }
1418 }
1419
1420 if (hwcaps.rsc.ip4 && hwcaps.rsc.ip6) {
1421 net->hw_features |= NETIF_F_LRO;
1422
1423 if (net->features & NETIF_F_LRO) {
1424 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1425 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1426 } else {
1427 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1428 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1429 }
1430 }
1431
1432 /* In case some hw_features disappeared we need to remove them from
1433 * net->features list as they're no longer supported.
1434 */
1435 net->features &= ~NETVSC_SUPPORTED_HW_FEATURES | net->hw_features;
1436
1437 netif_set_tso_max_size(net, gso_max_size);
1438
1439 ret = rndis_filter_set_offload_params(net, nvdev, &offloads);
1440
1441 return ret;
1442 }
1443
rndis_get_friendly_name(struct net_device * net,struct rndis_device * rndis_device,struct netvsc_device * net_device)1444 static void rndis_get_friendly_name(struct net_device *net,
1445 struct rndis_device *rndis_device,
1446 struct netvsc_device *net_device)
1447 {
1448 ucs2_char_t wname[256];
1449 unsigned long len;
1450 u8 ifalias[256];
1451 u32 size;
1452
1453 size = sizeof(wname);
1454 if (rndis_filter_query_device(rndis_device, net_device,
1455 RNDIS_OID_GEN_FRIENDLY_NAME,
1456 wname, &size) != 0)
1457 return; /* ignore if host does not support */
1458
1459 if (size == 0)
1460 return; /* name not set */
1461
1462 /* Convert Windows Unicode string to UTF-8 */
1463 len = ucs2_as_utf8(ifalias, wname, sizeof(ifalias));
1464
1465 /* ignore the default value from host */
1466 if (strcmp(ifalias, "Network Adapter") != 0)
1467 dev_set_alias(net, ifalias, len);
1468 }
1469
rndis_filter_device_add(struct hv_device * dev,struct netvsc_device_info * device_info)1470 struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
1471 struct netvsc_device_info *device_info)
1472 {
1473 struct net_device *net = hv_get_drvdata(dev);
1474 struct net_device_context *ndc = netdev_priv(net);
1475 struct netvsc_device *net_device;
1476 struct rndis_device *rndis_device;
1477 struct ndis_recv_scale_cap rsscap;
1478 u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
1479 u32 mtu, size;
1480 u32 num_possible_rss_qs;
1481 int i, ret;
1482
1483 rndis_device = get_rndis_device();
1484 if (!rndis_device)
1485 return ERR_PTR(-ENODEV);
1486
1487 /* Let the inner driver handle this first to create the netvsc channel
1488 * NOTE! Once the channel is created, we may get a receive callback
1489 * (RndisFilterOnReceive()) before this call is completed
1490 */
1491 net_device = netvsc_device_add(dev, device_info);
1492 if (IS_ERR(net_device)) {
1493 kfree(rndis_device);
1494 return net_device;
1495 }
1496
1497 /* Initialize the rndis device */
1498 net_device->max_chn = 1;
1499 net_device->num_chn = 1;
1500
1501 net_device->extension = rndis_device;
1502 rndis_device->ndev = net;
1503
1504 /* Send the rndis initialization message */
1505 ret = rndis_filter_init_device(rndis_device, net_device);
1506 if (ret != 0)
1507 goto err_dev_remv;
1508
1509 /* Get the MTU from the host */
1510 size = sizeof(u32);
1511 ret = rndis_filter_query_device(rndis_device, net_device,
1512 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
1513 &mtu, &size);
1514 if (ret == 0 && size == sizeof(u32) && mtu < net->mtu)
1515 net->mtu = mtu;
1516
1517 /* Get the mac address */
1518 ret = rndis_filter_query_device_mac(rndis_device, net_device);
1519 if (ret != 0)
1520 goto err_dev_remv;
1521
1522 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
1523
1524 /* Get friendly name as ifalias*/
1525 if (!net->ifalias)
1526 rndis_get_friendly_name(net, rndis_device, net_device);
1527
1528 /* Query and set hardware capabilities */
1529 ret = rndis_netdev_set_hwcaps(rndis_device, net_device);
1530 if (ret != 0)
1531 goto err_dev_remv;
1532
1533 rndis_filter_query_device_link_status(rndis_device, net_device);
1534
1535 netdev_dbg(net, "Device MAC %pM link state %s\n",
1536 rndis_device->hw_mac_adr,
1537 rndis_device->link_state ? "down" : "up");
1538
1539 if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
1540 goto out;
1541
1542 rndis_filter_query_link_speed(rndis_device, net_device);
1543
1544 /* vRSS setup */
1545 memset(&rsscap, 0, rsscap_size);
1546 ret = rndis_filter_query_device(rndis_device, net_device,
1547 OID_GEN_RECEIVE_SCALE_CAPABILITIES,
1548 &rsscap, &rsscap_size);
1549 if (ret || rsscap.num_recv_que < 2)
1550 goto out;
1551
1552 if (rsscap.num_indirect_tabent &&
1553 rsscap.num_indirect_tabent <= ITAB_NUM_MAX)
1554 ndc->rx_table_sz = rsscap.num_indirect_tabent;
1555 else
1556 ndc->rx_table_sz = ITAB_NUM;
1557
1558 ndc->rx_table = kcalloc(ndc->rx_table_sz, sizeof(u16), GFP_KERNEL);
1559 if (!ndc->rx_table) {
1560 ret = -ENOMEM;
1561 goto err_dev_remv;
1562 }
1563
1564 /* This guarantees that num_possible_rss_qs <= num_online_cpus */
1565 num_possible_rss_qs = min_t(u32, num_online_cpus(),
1566 rsscap.num_recv_que);
1567
1568 net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, num_possible_rss_qs);
1569
1570 /* We will use the given number of channels if available. */
1571 net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
1572
1573 if (!netif_is_rxfh_configured(net)) {
1574 for (i = 0; i < ndc->rx_table_sz; i++)
1575 ndc->rx_table[i] = ethtool_rxfh_indir_default(
1576 i, net_device->num_chn);
1577 }
1578
1579 atomic_set(&net_device->open_chn, 1);
1580 vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
1581
1582 for (i = 1; i < net_device->num_chn; i++) {
1583 ret = netvsc_alloc_recv_comp_ring(net_device, i);
1584 if (ret) {
1585 while (--i != 0)
1586 vfree(net_device->chan_table[i].mrc.slots);
1587 goto out;
1588 }
1589 }
1590
1591 for (i = 1; i < net_device->num_chn; i++)
1592 netif_napi_add(net, &net_device->chan_table[i].napi,
1593 netvsc_poll);
1594
1595 return net_device;
1596
1597 out:
1598 /* setting up multiple channels failed */
1599 net_device->max_chn = 1;
1600 net_device->num_chn = 1;
1601 return net_device;
1602
1603 err_dev_remv:
1604 rndis_filter_device_remove(dev, net_device);
1605 return ERR_PTR(ret);
1606 }
1607
rndis_filter_device_remove(struct hv_device * dev,struct netvsc_device * net_dev)1608 void rndis_filter_device_remove(struct hv_device *dev,
1609 struct netvsc_device *net_dev)
1610 {
1611 struct rndis_device *rndis_dev = net_dev->extension;
1612 struct net_device *net = hv_get_drvdata(dev);
1613 struct net_device_context *ndc;
1614
1615 ndc = netdev_priv(net);
1616
1617 /* Halt and release the rndis device */
1618 rndis_filter_halt_device(net_dev, rndis_dev);
1619
1620 netvsc_device_remove(dev);
1621
1622 ndc->rx_table_sz = 0;
1623 kfree(ndc->rx_table);
1624 ndc->rx_table = NULL;
1625 }
1626
rndis_filter_open(struct netvsc_device * nvdev)1627 int rndis_filter_open(struct netvsc_device *nvdev)
1628 {
1629 if (!nvdev)
1630 return -EINVAL;
1631
1632 return rndis_filter_open_device(nvdev->extension);
1633 }
1634
rndis_filter_close(struct netvsc_device * nvdev)1635 int rndis_filter_close(struct netvsc_device *nvdev)
1636 {
1637 if (!nvdev)
1638 return -EINVAL;
1639
1640 return rndis_filter_close_device(nvdev->extension);
1641 }
1642