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Merge tag 'arc-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
[thirdparty/linux.git] / drivers / net / hyperv / rndis_filter.c
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/kernel.h>
10 #include <linux/sched.h>
11 #include <linux/wait.h>
12 #include <linux/highmem.h>
13 #include <linux/slab.h>
14 #include <linux/io.h>
15 #include <linux/if_ether.h>
16 #include <linux/netdevice.h>
17 #include <linux/if_vlan.h>
18 #include <linux/nls.h>
19 #include <linux/vmalloc.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/ucs2_string.h>
22
23 #include "hyperv_net.h"
24 #include "netvsc_trace.h"
25
26 static void rndis_set_multicast(struct work_struct *w);
27
28 #define RNDIS_EXT_LEN PAGE_SIZE
29 struct rndis_request {
30 struct list_head list_ent;
31 struct completion wait_event;
32
33 struct rndis_message response_msg;
34 /*
35 * The buffer for extended info after the RNDIS response message. It's
36 * referenced based on the data offset in the RNDIS message. Its size
37 * is enough for current needs, and should be sufficient for the near
38 * future.
39 */
40 u8 response_ext[RNDIS_EXT_LEN];
41
42 /* Simplify allocation by having a netvsc packet inline */
43 struct hv_netvsc_packet pkt;
44
45 struct rndis_message request_msg;
46 /*
47 * The buffer for the extended info after the RNDIS request message.
48 * It is referenced and sized in a similar way as response_ext.
49 */
50 u8 request_ext[RNDIS_EXT_LEN];
51 };
52
53 static const u8 netvsc_hash_key[NETVSC_HASH_KEYLEN] = {
54 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
55 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
56 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
57 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
58 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa
59 };
60
61 static struct rndis_device *get_rndis_device(void)
62 {
63 struct rndis_device *device;
64
65 device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
66 if (!device)
67 return NULL;
68
69 spin_lock_init(&device->request_lock);
70
71 INIT_LIST_HEAD(&device->req_list);
72 INIT_WORK(&device->mcast_work, rndis_set_multicast);
73
74 device->state = RNDIS_DEV_UNINITIALIZED;
75
76 return device;
77 }
78
79 static struct rndis_request *get_rndis_request(struct rndis_device *dev,
80 u32 msg_type,
81 u32 msg_len)
82 {
83 struct rndis_request *request;
84 struct rndis_message *rndis_msg;
85 struct rndis_set_request *set;
86 unsigned long flags;
87
88 request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
89 if (!request)
90 return NULL;
91
92 init_completion(&request->wait_event);
93
94 rndis_msg = &request->request_msg;
95 rndis_msg->ndis_msg_type = msg_type;
96 rndis_msg->msg_len = msg_len;
97
98 request->pkt.q_idx = 0;
99
100 /*
101 * Set the request id. This field is always after the rndis header for
102 * request/response packet types so we just used the SetRequest as a
103 * template
104 */
105 set = &rndis_msg->msg.set_req;
106 set->req_id = atomic_inc_return(&dev->new_req_id);
107
108 /* Add to the request list */
109 spin_lock_irqsave(&dev->request_lock, flags);
110 list_add_tail(&request->list_ent, &dev->req_list);
111 spin_unlock_irqrestore(&dev->request_lock, flags);
112
113 return request;
114 }
115
116 static void put_rndis_request(struct rndis_device *dev,
117 struct rndis_request *req)
118 {
119 unsigned long flags;
120
121 spin_lock_irqsave(&dev->request_lock, flags);
122 list_del(&req->list_ent);
123 spin_unlock_irqrestore(&dev->request_lock, flags);
124
125 kfree(req);
126 }
127
128 static void dump_rndis_message(struct net_device *netdev,
129 const struct rndis_message *rndis_msg)
130 {
131 switch (rndis_msg->ndis_msg_type) {
132 case RNDIS_MSG_PACKET:
133 netdev_dbg(netdev, "RNDIS_MSG_PACKET (len %u, "
134 "data offset %u data len %u, # oob %u, "
135 "oob offset %u, oob len %u, pkt offset %u, "
136 "pkt len %u\n",
137 rndis_msg->msg_len,
138 rndis_msg->msg.pkt.data_offset,
139 rndis_msg->msg.pkt.data_len,
140 rndis_msg->msg.pkt.num_oob_data_elements,
141 rndis_msg->msg.pkt.oob_data_offset,
142 rndis_msg->msg.pkt.oob_data_len,
143 rndis_msg->msg.pkt.per_pkt_info_offset,
144 rndis_msg->msg.pkt.per_pkt_info_len);
145 break;
146
147 case RNDIS_MSG_INIT_C:
148 netdev_dbg(netdev, "RNDIS_MSG_INIT_C "
149 "(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
150 "device flags %d, max xfer size 0x%x, max pkts %u, "
151 "pkt aligned %u)\n",
152 rndis_msg->msg_len,
153 rndis_msg->msg.init_complete.req_id,
154 rndis_msg->msg.init_complete.status,
155 rndis_msg->msg.init_complete.major_ver,
156 rndis_msg->msg.init_complete.minor_ver,
157 rndis_msg->msg.init_complete.dev_flags,
158 rndis_msg->msg.init_complete.max_xfer_size,
159 rndis_msg->msg.init_complete.
160 max_pkt_per_msg,
161 rndis_msg->msg.init_complete.
162 pkt_alignment_factor);
163 break;
164
165 case RNDIS_MSG_QUERY_C:
166 netdev_dbg(netdev, "RNDIS_MSG_QUERY_C "
167 "(len %u, id 0x%x, status 0x%x, buf len %u, "
168 "buf offset %u)\n",
169 rndis_msg->msg_len,
170 rndis_msg->msg.query_complete.req_id,
171 rndis_msg->msg.query_complete.status,
172 rndis_msg->msg.query_complete.
173 info_buflen,
174 rndis_msg->msg.query_complete.
175 info_buf_offset);
176 break;
177
178 case RNDIS_MSG_SET_C:
179 netdev_dbg(netdev,
180 "RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
181 rndis_msg->msg_len,
182 rndis_msg->msg.set_complete.req_id,
183 rndis_msg->msg.set_complete.status);
184 break;
185
186 case RNDIS_MSG_INDICATE:
187 netdev_dbg(netdev, "RNDIS_MSG_INDICATE "
188 "(len %u, status 0x%x, buf len %u, buf offset %u)\n",
189 rndis_msg->msg_len,
190 rndis_msg->msg.indicate_status.status,
191 rndis_msg->msg.indicate_status.status_buflen,
192 rndis_msg->msg.indicate_status.status_buf_offset);
193 break;
194
195 default:
196 netdev_dbg(netdev, "0x%x (len %u)\n",
197 rndis_msg->ndis_msg_type,
198 rndis_msg->msg_len);
199 break;
200 }
201 }
202
203 static int rndis_filter_send_request(struct rndis_device *dev,
204 struct rndis_request *req)
205 {
206 struct hv_netvsc_packet *packet;
207 struct hv_page_buffer page_buf[2];
208 struct hv_page_buffer *pb = page_buf;
209 int ret;
210
211 /* Setup the packet to send it */
212 packet = &req->pkt;
213
214 packet->total_data_buflen = req->request_msg.msg_len;
215 packet->page_buf_cnt = 1;
216
217 pb[0].pfn = virt_to_phys(&req->request_msg) >>
218 PAGE_SHIFT;
219 pb[0].len = req->request_msg.msg_len;
220 pb[0].offset =
221 (unsigned long)&req->request_msg & (PAGE_SIZE - 1);
222
223 /* Add one page_buf when request_msg crossing page boundary */
224 if (pb[0].offset + pb[0].len > PAGE_SIZE) {
225 packet->page_buf_cnt++;
226 pb[0].len = PAGE_SIZE -
227 pb[0].offset;
228 pb[1].pfn = virt_to_phys((void *)&req->request_msg
229 + pb[0].len) >> PAGE_SHIFT;
230 pb[1].offset = 0;
231 pb[1].len = req->request_msg.msg_len -
232 pb[0].len;
233 }
234
235 trace_rndis_send(dev->ndev, 0, &req->request_msg);
236
237 rcu_read_lock_bh();
238 ret = netvsc_send(dev->ndev, packet, NULL, pb, NULL);
239 rcu_read_unlock_bh();
240
241 return ret;
242 }
243
244 static void rndis_set_link_state(struct rndis_device *rdev,
245 struct rndis_request *request)
246 {
247 u32 link_status;
248 struct rndis_query_complete *query_complete;
249
250 query_complete = &request->response_msg.msg.query_complete;
251
252 if (query_complete->status == RNDIS_STATUS_SUCCESS &&
253 query_complete->info_buflen == sizeof(u32)) {
254 memcpy(&link_status, (void *)((unsigned long)query_complete +
255 query_complete->info_buf_offset), sizeof(u32));
256 rdev->link_state = link_status != 0;
257 }
258 }
259
260 static void rndis_filter_receive_response(struct net_device *ndev,
261 struct netvsc_device *nvdev,
262 const struct rndis_message *resp)
263 {
264 struct rndis_device *dev = nvdev->extension;
265 struct rndis_request *request = NULL;
266 bool found = false;
267 unsigned long flags;
268
269 /* This should never happen, it means control message
270 * response received after device removed.
271 */
272 if (dev->state == RNDIS_DEV_UNINITIALIZED) {
273 netdev_err(ndev,
274 "got rndis message uninitialized\n");
275 return;
276 }
277
278 spin_lock_irqsave(&dev->request_lock, flags);
279 list_for_each_entry(request, &dev->req_list, list_ent) {
280 /*
281 * All request/response message contains RequestId as the 1st
282 * field
283 */
284 if (request->request_msg.msg.init_req.req_id
285 == resp->msg.init_complete.req_id) {
286 found = true;
287 break;
288 }
289 }
290 spin_unlock_irqrestore(&dev->request_lock, flags);
291
292 if (found) {
293 if (resp->msg_len <=
294 sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
295 memcpy(&request->response_msg, resp,
296 resp->msg_len);
297 if (request->request_msg.ndis_msg_type ==
298 RNDIS_MSG_QUERY && request->request_msg.msg.
299 query_req.oid == RNDIS_OID_GEN_MEDIA_CONNECT_STATUS)
300 rndis_set_link_state(dev, request);
301 } else {
302 netdev_err(ndev,
303 "rndis response buffer overflow "
304 "detected (size %u max %zu)\n",
305 resp->msg_len,
306 sizeof(struct rndis_message));
307
308 if (resp->ndis_msg_type ==
309 RNDIS_MSG_RESET_C) {
310 /* does not have a request id field */
311 request->response_msg.msg.reset_complete.
312 status = RNDIS_STATUS_BUFFER_OVERFLOW;
313 } else {
314 request->response_msg.msg.
315 init_complete.status =
316 RNDIS_STATUS_BUFFER_OVERFLOW;
317 }
318 }
319
320 complete(&request->wait_event);
321 } else {
322 netdev_err(ndev,
323 "no rndis request found for this response "
324 "(id 0x%x res type 0x%x)\n",
325 resp->msg.init_complete.req_id,
326 resp->ndis_msg_type);
327 }
328 }
329
330 /*
331 * Get the Per-Packet-Info with the specified type
332 * return NULL if not found.
333 */
334 static inline void *rndis_get_ppi(struct rndis_packet *rpkt,
335 u32 type, u8 internal)
336 {
337 struct rndis_per_packet_info *ppi;
338 int len;
339
340 if (rpkt->per_pkt_info_offset == 0)
341 return NULL;
342
343 ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
344 rpkt->per_pkt_info_offset);
345 len = rpkt->per_pkt_info_len;
346
347 while (len > 0) {
348 if (ppi->type == type && ppi->internal == internal)
349 return (void *)((ulong)ppi + ppi->ppi_offset);
350 len -= ppi->size;
351 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
352 }
353
354 return NULL;
355 }
356
357 static inline
358 void rsc_add_data(struct netvsc_channel *nvchan,
359 const struct ndis_pkt_8021q_info *vlan,
360 const struct ndis_tcp_ip_checksum_info *csum_info,
361 const u32 *hash_info,
362 void *data, u32 len)
363 {
364 u32 cnt = nvchan->rsc.cnt;
365
366 if (cnt) {
367 nvchan->rsc.pktlen += len;
368 } else {
369 nvchan->rsc.vlan = vlan;
370 nvchan->rsc.csum_info = csum_info;
371 nvchan->rsc.pktlen = len;
372 nvchan->rsc.hash_info = hash_info;
373 }
374
375 nvchan->rsc.data[cnt] = data;
376 nvchan->rsc.len[cnt] = len;
377 nvchan->rsc.cnt++;
378 }
379
380 static int rndis_filter_receive_data(struct net_device *ndev,
381 struct netvsc_device *nvdev,
382 struct netvsc_channel *nvchan,
383 struct rndis_message *msg,
384 u32 data_buflen)
385 {
386 struct rndis_packet *rndis_pkt = &msg->msg.pkt;
387 const struct ndis_tcp_ip_checksum_info *csum_info;
388 const struct ndis_pkt_8021q_info *vlan;
389 const struct rndis_pktinfo_id *pktinfo_id;
390 const u32 *hash_info;
391 u32 data_offset;
392 void *data;
393 bool rsc_more = false;
394 int ret;
395
396 /* Remove the rndis header and pass it back up the stack */
397 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
398
399 data_buflen -= data_offset;
400
401 /*
402 * Make sure we got a valid RNDIS message, now total_data_buflen
403 * should be the data packet size plus the trailer padding size
404 */
405 if (unlikely(data_buflen < rndis_pkt->data_len)) {
406 netdev_err(ndev, "rndis message buffer "
407 "overflow detected (got %u, min %u)"
408 "...dropping this message!\n",
409 data_buflen, rndis_pkt->data_len);
410 return NVSP_STAT_FAIL;
411 }
412
413 vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO, 0);
414
415 csum_info = rndis_get_ppi(rndis_pkt, TCPIP_CHKSUM_PKTINFO, 0);
416
417 hash_info = rndis_get_ppi(rndis_pkt, NBL_HASH_VALUE, 0);
418
419 pktinfo_id = rndis_get_ppi(rndis_pkt, RNDIS_PKTINFO_ID, 1);
420
421 data = (void *)msg + data_offset;
422
423 /* Identify RSC frags, drop erroneous packets */
424 if (pktinfo_id && (pktinfo_id->flag & RNDIS_PKTINFO_SUBALLOC)) {
425 if (pktinfo_id->flag & RNDIS_PKTINFO_1ST_FRAG)
426 nvchan->rsc.cnt = 0;
427 else if (nvchan->rsc.cnt == 0)
428 goto drop;
429
430 rsc_more = true;
431
432 if (pktinfo_id->flag & RNDIS_PKTINFO_LAST_FRAG)
433 rsc_more = false;
434
435 if (rsc_more && nvchan->rsc.is_last)
436 goto drop;
437 } else {
438 nvchan->rsc.cnt = 0;
439 }
440
441 if (unlikely(nvchan->rsc.cnt >= NVSP_RSC_MAX))
442 goto drop;
443
444 /* Put data into per channel structure.
445 * Also, remove the rndis trailer padding from rndis packet message
446 * rndis_pkt->data_len tell us the real data length, we only copy
447 * the data packet to the stack, without the rndis trailer padding
448 */
449 rsc_add_data(nvchan, vlan, csum_info, hash_info,
450 data, rndis_pkt->data_len);
451
452 if (rsc_more)
453 return NVSP_STAT_SUCCESS;
454
455 ret = netvsc_recv_callback(ndev, nvdev, nvchan);
456 nvchan->rsc.cnt = 0;
457
458 return ret;
459
460 drop:
461 /* Drop incomplete packet */
462 nvchan->rsc.cnt = 0;
463 return NVSP_STAT_FAIL;
464 }
465
466 int rndis_filter_receive(struct net_device *ndev,
467 struct netvsc_device *net_dev,
468 struct netvsc_channel *nvchan,
469 void *data, u32 buflen)
470 {
471 struct net_device_context *net_device_ctx = netdev_priv(ndev);
472 struct rndis_message *rndis_msg = data;
473
474 if (netif_msg_rx_status(net_device_ctx))
475 dump_rndis_message(ndev, rndis_msg);
476
477 switch (rndis_msg->ndis_msg_type) {
478 case RNDIS_MSG_PACKET:
479 return rndis_filter_receive_data(ndev, net_dev, nvchan,
480 rndis_msg, buflen);
481 case RNDIS_MSG_INIT_C:
482 case RNDIS_MSG_QUERY_C:
483 case RNDIS_MSG_SET_C:
484 /* completion msgs */
485 rndis_filter_receive_response(ndev, net_dev, rndis_msg);
486 break;
487
488 case RNDIS_MSG_INDICATE:
489 /* notification msgs */
490 netvsc_linkstatus_callback(ndev, rndis_msg);
491 break;
492 default:
493 netdev_err(ndev,
494 "unhandled rndis message (type %u len %u)\n",
495 rndis_msg->ndis_msg_type,
496 rndis_msg->msg_len);
497 return NVSP_STAT_FAIL;
498 }
499
500 return NVSP_STAT_SUCCESS;
501 }
502
503 static int rndis_filter_query_device(struct rndis_device *dev,
504 struct netvsc_device *nvdev,
505 u32 oid, void *result, u32 *result_size)
506 {
507 struct rndis_request *request;
508 u32 inresult_size = *result_size;
509 struct rndis_query_request *query;
510 struct rndis_query_complete *query_complete;
511 int ret = 0;
512
513 if (!result)
514 return -EINVAL;
515
516 *result_size = 0;
517 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
518 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
519 if (!request) {
520 ret = -ENOMEM;
521 goto cleanup;
522 }
523
524 /* Setup the rndis query */
525 query = &request->request_msg.msg.query_req;
526 query->oid = oid;
527 query->info_buf_offset = sizeof(struct rndis_query_request);
528 query->info_buflen = 0;
529 query->dev_vc_handle = 0;
530
531 if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) {
532 struct ndis_offload *hwcaps;
533 u32 nvsp_version = nvdev->nvsp_version;
534 u8 ndis_rev;
535 size_t size;
536
537 if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) {
538 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
539 size = NDIS_OFFLOAD_SIZE;
540 } else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) {
541 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2;
542 size = NDIS_OFFLOAD_SIZE_6_1;
543 } else {
544 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1;
545 size = NDIS_OFFLOAD_SIZE_6_0;
546 }
547
548 request->request_msg.msg_len += size;
549 query->info_buflen = size;
550 hwcaps = (struct ndis_offload *)
551 ((unsigned long)query + query->info_buf_offset);
552
553 hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD;
554 hwcaps->header.revision = ndis_rev;
555 hwcaps->header.size = size;
556
557 } else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
558 struct ndis_recv_scale_cap *cap;
559
560 request->request_msg.msg_len +=
561 sizeof(struct ndis_recv_scale_cap);
562 query->info_buflen = sizeof(struct ndis_recv_scale_cap);
563 cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
564 query->info_buf_offset);
565 cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
566 cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
567 cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
568 }
569
570 ret = rndis_filter_send_request(dev, request);
571 if (ret != 0)
572 goto cleanup;
573
574 wait_for_completion(&request->wait_event);
575
576 /* Copy the response back */
577 query_complete = &request->response_msg.msg.query_complete;
578
579 if (query_complete->info_buflen > inresult_size) {
580 ret = -1;
581 goto cleanup;
582 }
583
584 memcpy(result,
585 (void *)((unsigned long)query_complete +
586 query_complete->info_buf_offset),
587 query_complete->info_buflen);
588
589 *result_size = query_complete->info_buflen;
590
591 cleanup:
592 if (request)
593 put_rndis_request(dev, request);
594
595 return ret;
596 }
597
598 /* Get the hardware offload capabilities */
599 static int
600 rndis_query_hwcaps(struct rndis_device *dev, struct netvsc_device *net_device,
601 struct ndis_offload *caps)
602 {
603 u32 caps_len = sizeof(*caps);
604 int ret;
605
606 memset(caps, 0, sizeof(*caps));
607
608 ret = rndis_filter_query_device(dev, net_device,
609 OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
610 caps, &caps_len);
611 if (ret)
612 return ret;
613
614 if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) {
615 netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n",
616 caps->header.type);
617 return -EINVAL;
618 }
619
620 if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) {
621 netdev_warn(dev->ndev, "invalid NDIS objrev %x\n",
622 caps->header.revision);
623 return -EINVAL;
624 }
625
626 if (caps->header.size > caps_len ||
627 caps->header.size < NDIS_OFFLOAD_SIZE_6_0) {
628 netdev_warn(dev->ndev,
629 "invalid NDIS objsize %u, data size %u\n",
630 caps->header.size, caps_len);
631 return -EINVAL;
632 }
633
634 return 0;
635 }
636
637 static int rndis_filter_query_device_mac(struct rndis_device *dev,
638 struct netvsc_device *net_device)
639 {
640 u32 size = ETH_ALEN;
641
642 return rndis_filter_query_device(dev, net_device,
643 RNDIS_OID_802_3_PERMANENT_ADDRESS,
644 dev->hw_mac_adr, &size);
645 }
646
647 #define NWADR_STR "NetworkAddress"
648 #define NWADR_STRLEN 14
649
650 int rndis_filter_set_device_mac(struct netvsc_device *nvdev,
651 const char *mac)
652 {
653 struct rndis_device *rdev = nvdev->extension;
654 struct rndis_request *request;
655 struct rndis_set_request *set;
656 struct rndis_config_parameter_info *cpi;
657 wchar_t *cfg_nwadr, *cfg_mac;
658 struct rndis_set_complete *set_complete;
659 char macstr[2*ETH_ALEN+1];
660 u32 extlen = sizeof(struct rndis_config_parameter_info) +
661 2*NWADR_STRLEN + 4*ETH_ALEN;
662 int ret;
663
664 request = get_rndis_request(rdev, RNDIS_MSG_SET,
665 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
666 if (!request)
667 return -ENOMEM;
668
669 set = &request->request_msg.msg.set_req;
670 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
671 set->info_buflen = extlen;
672 set->info_buf_offset = sizeof(struct rndis_set_request);
673 set->dev_vc_handle = 0;
674
675 cpi = (struct rndis_config_parameter_info *)((ulong)set +
676 set->info_buf_offset);
677 cpi->parameter_name_offset =
678 sizeof(struct rndis_config_parameter_info);
679 /* Multiply by 2 because host needs 2 bytes (utf16) for each char */
680 cpi->parameter_name_length = 2*NWADR_STRLEN;
681 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
682 cpi->parameter_value_offset =
683 cpi->parameter_name_offset + cpi->parameter_name_length;
684 /* Multiply by 4 because each MAC byte displayed as 2 utf16 chars */
685 cpi->parameter_value_length = 4*ETH_ALEN;
686
687 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
688 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
689 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
690 cfg_nwadr, NWADR_STRLEN);
691 if (ret < 0)
692 goto cleanup;
693 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
694 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
695 cfg_mac, 2*ETH_ALEN);
696 if (ret < 0)
697 goto cleanup;
698
699 ret = rndis_filter_send_request(rdev, request);
700 if (ret != 0)
701 goto cleanup;
702
703 wait_for_completion(&request->wait_event);
704
705 set_complete = &request->response_msg.msg.set_complete;
706 if (set_complete->status != RNDIS_STATUS_SUCCESS)
707 ret = -EIO;
708
709 cleanup:
710 put_rndis_request(rdev, request);
711 return ret;
712 }
713
714 int
715 rndis_filter_set_offload_params(struct net_device *ndev,
716 struct netvsc_device *nvdev,
717 struct ndis_offload_params *req_offloads)
718 {
719 struct rndis_device *rdev = nvdev->extension;
720 struct rndis_request *request;
721 struct rndis_set_request *set;
722 struct ndis_offload_params *offload_params;
723 struct rndis_set_complete *set_complete;
724 u32 extlen = sizeof(struct ndis_offload_params);
725 int ret;
726 u32 vsp_version = nvdev->nvsp_version;
727
728 if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
729 extlen = VERSION_4_OFFLOAD_SIZE;
730 /* On NVSP_PROTOCOL_VERSION_4 and below, we do not support
731 * UDP checksum offload.
732 */
733 req_offloads->udp_ip_v4_csum = 0;
734 req_offloads->udp_ip_v6_csum = 0;
735 }
736
737 request = get_rndis_request(rdev, RNDIS_MSG_SET,
738 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
739 if (!request)
740 return -ENOMEM;
741
742 set = &request->request_msg.msg.set_req;
743 set->oid = OID_TCP_OFFLOAD_PARAMETERS;
744 set->info_buflen = extlen;
745 set->info_buf_offset = sizeof(struct rndis_set_request);
746 set->dev_vc_handle = 0;
747
748 offload_params = (struct ndis_offload_params *)((ulong)set +
749 set->info_buf_offset);
750 *offload_params = *req_offloads;
751 offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
752 offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
753 offload_params->header.size = extlen;
754
755 ret = rndis_filter_send_request(rdev, request);
756 if (ret != 0)
757 goto cleanup;
758
759 wait_for_completion(&request->wait_event);
760 set_complete = &request->response_msg.msg.set_complete;
761 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
762 netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
763 set_complete->status);
764 ret = -EINVAL;
765 }
766
767 cleanup:
768 put_rndis_request(rdev, request);
769 return ret;
770 }
771
772 static int rndis_set_rss_param_msg(struct rndis_device *rdev,
773 const u8 *rss_key, u16 flag)
774 {
775 struct net_device *ndev = rdev->ndev;
776 struct rndis_request *request;
777 struct rndis_set_request *set;
778 struct rndis_set_complete *set_complete;
779 u32 extlen = sizeof(struct ndis_recv_scale_param) +
780 4 * ITAB_NUM + NETVSC_HASH_KEYLEN;
781 struct ndis_recv_scale_param *rssp;
782 u32 *itab;
783 u8 *keyp;
784 int i, ret;
785
786 request = get_rndis_request(
787 rdev, RNDIS_MSG_SET,
788 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
789 if (!request)
790 return -ENOMEM;
791
792 set = &request->request_msg.msg.set_req;
793 set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
794 set->info_buflen = extlen;
795 set->info_buf_offset = sizeof(struct rndis_set_request);
796 set->dev_vc_handle = 0;
797
798 rssp = (struct ndis_recv_scale_param *)(set + 1);
799 rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
800 rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
801 rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
802 rssp->flag = flag;
803 rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
804 NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
805 NDIS_HASH_TCP_IPV6;
806 rssp->indirect_tabsize = 4*ITAB_NUM;
807 rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
808 rssp->hashkey_size = NETVSC_HASH_KEYLEN;
809 rssp->hashkey_offset = rssp->indirect_taboffset +
810 rssp->indirect_tabsize;
811
812 /* Set indirection table entries */
813 itab = (u32 *)(rssp + 1);
814 for (i = 0; i < ITAB_NUM; i++)
815 itab[i] = rdev->rx_table[i];
816
817 /* Set hask key values */
818 keyp = (u8 *)((unsigned long)rssp + rssp->hashkey_offset);
819 memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
820
821 ret = rndis_filter_send_request(rdev, request);
822 if (ret != 0)
823 goto cleanup;
824
825 wait_for_completion(&request->wait_event);
826 set_complete = &request->response_msg.msg.set_complete;
827 if (set_complete->status == RNDIS_STATUS_SUCCESS) {
828 if (!(flag & NDIS_RSS_PARAM_FLAG_DISABLE_RSS) &&
829 !(flag & NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED))
830 memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
831
832 } else {
833 netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
834 set_complete->status);
835 ret = -EINVAL;
836 }
837
838 cleanup:
839 put_rndis_request(rdev, request);
840 return ret;
841 }
842
843 int rndis_filter_set_rss_param(struct rndis_device *rdev,
844 const u8 *rss_key)
845 {
846 /* Disable RSS before change */
847 rndis_set_rss_param_msg(rdev, rss_key,
848 NDIS_RSS_PARAM_FLAG_DISABLE_RSS);
849
850 return rndis_set_rss_param_msg(rdev, rss_key, 0);
851 }
852
853 static int rndis_filter_query_device_link_status(struct rndis_device *dev,
854 struct netvsc_device *net_device)
855 {
856 u32 size = sizeof(u32);
857 u32 link_status;
858
859 return rndis_filter_query_device(dev, net_device,
860 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
861 &link_status, &size);
862 }
863
864 static int rndis_filter_query_link_speed(struct rndis_device *dev,
865 struct netvsc_device *net_device)
866 {
867 u32 size = sizeof(u32);
868 u32 link_speed;
869 struct net_device_context *ndc;
870 int ret;
871
872 ret = rndis_filter_query_device(dev, net_device,
873 RNDIS_OID_GEN_LINK_SPEED,
874 &link_speed, &size);
875
876 if (!ret) {
877 ndc = netdev_priv(dev->ndev);
878
879 /* The link speed reported from host is in 100bps unit, so
880 * we convert it to Mbps here.
881 */
882 ndc->speed = link_speed / 10000;
883 }
884
885 return ret;
886 }
887
888 static int rndis_filter_set_packet_filter(struct rndis_device *dev,
889 u32 new_filter)
890 {
891 struct rndis_request *request;
892 struct rndis_set_request *set;
893 int ret;
894
895 if (dev->filter == new_filter)
896 return 0;
897
898 request = get_rndis_request(dev, RNDIS_MSG_SET,
899 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
900 sizeof(u32));
901 if (!request)
902 return -ENOMEM;
903
904 /* Setup the rndis set */
905 set = &request->request_msg.msg.set_req;
906 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
907 set->info_buflen = sizeof(u32);
908 set->info_buf_offset = sizeof(struct rndis_set_request);
909
910 memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
911 &new_filter, sizeof(u32));
912
913 ret = rndis_filter_send_request(dev, request);
914 if (ret == 0) {
915 wait_for_completion(&request->wait_event);
916 dev->filter = new_filter;
917 }
918
919 put_rndis_request(dev, request);
920
921 return ret;
922 }
923
924 static void rndis_set_multicast(struct work_struct *w)
925 {
926 struct rndis_device *rdev
927 = container_of(w, struct rndis_device, mcast_work);
928 u32 filter = NDIS_PACKET_TYPE_DIRECTED;
929 unsigned int flags = rdev->ndev->flags;
930
931 if (flags & IFF_PROMISC) {
932 filter = NDIS_PACKET_TYPE_PROMISCUOUS;
933 } else {
934 if (!netdev_mc_empty(rdev->ndev) || (flags & IFF_ALLMULTI))
935 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
936 if (flags & IFF_BROADCAST)
937 filter |= NDIS_PACKET_TYPE_BROADCAST;
938 }
939
940 rndis_filter_set_packet_filter(rdev, filter);
941 }
942
943 void rndis_filter_update(struct netvsc_device *nvdev)
944 {
945 struct rndis_device *rdev = nvdev->extension;
946
947 schedule_work(&rdev->mcast_work);
948 }
949
950 static int rndis_filter_init_device(struct rndis_device *dev,
951 struct netvsc_device *nvdev)
952 {
953 struct rndis_request *request;
954 struct rndis_initialize_request *init;
955 struct rndis_initialize_complete *init_complete;
956 u32 status;
957 int ret;
958
959 request = get_rndis_request(dev, RNDIS_MSG_INIT,
960 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
961 if (!request) {
962 ret = -ENOMEM;
963 goto cleanup;
964 }
965
966 /* Setup the rndis set */
967 init = &request->request_msg.msg.init_req;
968 init->major_ver = RNDIS_MAJOR_VERSION;
969 init->minor_ver = RNDIS_MINOR_VERSION;
970 init->max_xfer_size = 0x4000;
971
972 dev->state = RNDIS_DEV_INITIALIZING;
973
974 ret = rndis_filter_send_request(dev, request);
975 if (ret != 0) {
976 dev->state = RNDIS_DEV_UNINITIALIZED;
977 goto cleanup;
978 }
979
980 wait_for_completion(&request->wait_event);
981
982 init_complete = &request->response_msg.msg.init_complete;
983 status = init_complete->status;
984 if (status == RNDIS_STATUS_SUCCESS) {
985 dev->state = RNDIS_DEV_INITIALIZED;
986 nvdev->max_pkt = init_complete->max_pkt_per_msg;
987 nvdev->pkt_align = 1 << init_complete->pkt_alignment_factor;
988 ret = 0;
989 } else {
990 dev->state = RNDIS_DEV_UNINITIALIZED;
991 ret = -EINVAL;
992 }
993
994 cleanup:
995 if (request)
996 put_rndis_request(dev, request);
997
998 return ret;
999 }
1000
1001 static bool netvsc_device_idle(const struct netvsc_device *nvdev)
1002 {
1003 int i;
1004
1005 for (i = 0; i < nvdev->num_chn; i++) {
1006 const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
1007
1008 if (nvchan->mrc.first != nvchan->mrc.next)
1009 return false;
1010
1011 if (atomic_read(&nvchan->queue_sends) > 0)
1012 return false;
1013 }
1014
1015 return true;
1016 }
1017
1018 static void rndis_filter_halt_device(struct netvsc_device *nvdev,
1019 struct rndis_device *dev)
1020 {
1021 struct rndis_request *request;
1022 struct rndis_halt_request *halt;
1023
1024 /* Attempt to do a rndis device halt */
1025 request = get_rndis_request(dev, RNDIS_MSG_HALT,
1026 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
1027 if (!request)
1028 goto cleanup;
1029
1030 /* Setup the rndis set */
1031 halt = &request->request_msg.msg.halt_req;
1032 halt->req_id = atomic_inc_return(&dev->new_req_id);
1033
1034 /* Ignore return since this msg is optional. */
1035 rndis_filter_send_request(dev, request);
1036
1037 dev->state = RNDIS_DEV_UNINITIALIZED;
1038
1039 cleanup:
1040 nvdev->destroy = true;
1041
1042 /* Force flag to be ordered before waiting */
1043 wmb();
1044
1045 /* Wait for all send completions */
1046 wait_event(nvdev->wait_drain, netvsc_device_idle(nvdev));
1047
1048 if (request)
1049 put_rndis_request(dev, request);
1050 }
1051
1052 static int rndis_filter_open_device(struct rndis_device *dev)
1053 {
1054 int ret;
1055
1056 if (dev->state != RNDIS_DEV_INITIALIZED)
1057 return 0;
1058
1059 ret = rndis_filter_set_packet_filter(dev,
1060 NDIS_PACKET_TYPE_BROADCAST |
1061 NDIS_PACKET_TYPE_ALL_MULTICAST |
1062 NDIS_PACKET_TYPE_DIRECTED);
1063 if (ret == 0)
1064 dev->state = RNDIS_DEV_DATAINITIALIZED;
1065
1066 return ret;
1067 }
1068
1069 static int rndis_filter_close_device(struct rndis_device *dev)
1070 {
1071 int ret;
1072
1073 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
1074 return 0;
1075
1076 /* Make sure rndis_set_multicast doesn't re-enable filter! */
1077 cancel_work_sync(&dev->mcast_work);
1078
1079 ret = rndis_filter_set_packet_filter(dev, 0);
1080 if (ret == -ENODEV)
1081 ret = 0;
1082
1083 if (ret == 0)
1084 dev->state = RNDIS_DEV_INITIALIZED;
1085
1086 return ret;
1087 }
1088
1089 static void netvsc_sc_open(struct vmbus_channel *new_sc)
1090 {
1091 struct net_device *ndev =
1092 hv_get_drvdata(new_sc->primary_channel->device_obj);
1093 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1094 struct netvsc_device *nvscdev;
1095 u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
1096 struct netvsc_channel *nvchan;
1097 int ret;
1098
1099 /* This is safe because this callback only happens when
1100 * new device is being setup and waiting on the channel_init_wait.
1101 */
1102 nvscdev = rcu_dereference_raw(ndev_ctx->nvdev);
1103 if (!nvscdev || chn_index >= nvscdev->num_chn)
1104 return;
1105
1106 nvchan = nvscdev->chan_table + chn_index;
1107
1108 /* Because the device uses NAPI, all the interrupt batching and
1109 * control is done via Net softirq, not the channel handling
1110 */
1111 set_channel_read_mode(new_sc, HV_CALL_ISR);
1112
1113 /* Set the channel before opening.*/
1114 nvchan->channel = new_sc;
1115
1116 ret = vmbus_open(new_sc, netvsc_ring_bytes,
1117 netvsc_ring_bytes, NULL, 0,
1118 netvsc_channel_cb, nvchan);
1119 if (ret == 0)
1120 napi_enable(&nvchan->napi);
1121 else
1122 netdev_notice(ndev, "sub channel open failed: %d\n", ret);
1123
1124 if (atomic_inc_return(&nvscdev->open_chn) == nvscdev->num_chn)
1125 wake_up(&nvscdev->subchan_open);
1126 }
1127
1128 /* Open sub-channels after completing the handling of the device probe.
1129 * This breaks overlap of processing the host message for the
1130 * new primary channel with the initialization of sub-channels.
1131 */
1132 int rndis_set_subchannel(struct net_device *ndev,
1133 struct netvsc_device *nvdev,
1134 struct netvsc_device_info *dev_info)
1135 {
1136 struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
1137 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1138 struct hv_device *hv_dev = ndev_ctx->device_ctx;
1139 struct rndis_device *rdev = nvdev->extension;
1140 int i, ret;
1141
1142 ASSERT_RTNL();
1143
1144 memset(init_packet, 0, sizeof(struct nvsp_message));
1145 init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
1146 init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
1147 init_packet->msg.v5_msg.subchn_req.num_subchannels =
1148 nvdev->num_chn - 1;
1149 trace_nvsp_send(ndev, init_packet);
1150
1151 ret = vmbus_sendpacket(hv_dev->channel, init_packet,
1152 sizeof(struct nvsp_message),
1153 (unsigned long)init_packet,
1154 VM_PKT_DATA_INBAND,
1155 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
1156 if (ret) {
1157 netdev_err(ndev, "sub channel allocate send failed: %d\n", ret);
1158 return ret;
1159 }
1160
1161 wait_for_completion(&nvdev->channel_init_wait);
1162 if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
1163 netdev_err(ndev, "sub channel request failed\n");
1164 return -EIO;
1165 }
1166
1167 nvdev->num_chn = 1 +
1168 init_packet->msg.v5_msg.subchn_comp.num_subchannels;
1169
1170 /* wait for all sub channels to open */
1171 wait_event(nvdev->subchan_open,
1172 atomic_read(&nvdev->open_chn) == nvdev->num_chn);
1173
1174 /* ignore failures from setting rss parameters, still have channels */
1175 if (dev_info)
1176 rndis_filter_set_rss_param(rdev, dev_info->rss_key);
1177 else
1178 rndis_filter_set_rss_param(rdev, netvsc_hash_key);
1179
1180 netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
1181 netif_set_real_num_rx_queues(ndev, nvdev->num_chn);
1182
1183 for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
1184 ndev_ctx->tx_table[i] = i % nvdev->num_chn;
1185
1186 return 0;
1187 }
1188
1189 static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
1190 struct netvsc_device *nvdev)
1191 {
1192 struct net_device *net = rndis_device->ndev;
1193 struct net_device_context *net_device_ctx = netdev_priv(net);
1194 struct ndis_offload hwcaps;
1195 struct ndis_offload_params offloads;
1196 unsigned int gso_max_size = GSO_MAX_SIZE;
1197 int ret;
1198
1199 /* Find HW offload capabilities */
1200 ret = rndis_query_hwcaps(rndis_device, nvdev, &hwcaps);
1201 if (ret != 0)
1202 return ret;
1203
1204 /* A value of zero means "no change"; now turn on what we want. */
1205 memset(&offloads, 0, sizeof(struct ndis_offload_params));
1206
1207 /* Linux does not care about IP checksum, always does in kernel */
1208 offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED;
1209
1210 /* Reset previously set hw_features flags */
1211 net->hw_features &= ~NETVSC_SUPPORTED_HW_FEATURES;
1212 net_device_ctx->tx_checksum_mask = 0;
1213
1214 /* Compute tx offload settings based on hw capabilities */
1215 net->hw_features |= NETIF_F_RXCSUM;
1216 net->hw_features |= NETIF_F_SG;
1217 net->hw_features |= NETIF_F_RXHASH;
1218
1219 if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
1220 /* Can checksum TCP */
1221 net->hw_features |= NETIF_F_IP_CSUM;
1222 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP;
1223
1224 offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1225
1226 if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) {
1227 offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1228 net->hw_features |= NETIF_F_TSO;
1229
1230 if (hwcaps.lsov2.ip4_maxsz < gso_max_size)
1231 gso_max_size = hwcaps.lsov2.ip4_maxsz;
1232 }
1233
1234 if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) {
1235 offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1236 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP;
1237 }
1238 }
1239
1240 if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) {
1241 net->hw_features |= NETIF_F_IPV6_CSUM;
1242
1243 offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1244 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP;
1245
1246 if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) &&
1247 (hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) {
1248 offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1249 net->hw_features |= NETIF_F_TSO6;
1250
1251 if (hwcaps.lsov2.ip6_maxsz < gso_max_size)
1252 gso_max_size = hwcaps.lsov2.ip6_maxsz;
1253 }
1254
1255 if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) {
1256 offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1257 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP;
1258 }
1259 }
1260
1261 if (hwcaps.rsc.ip4 && hwcaps.rsc.ip6) {
1262 net->hw_features |= NETIF_F_LRO;
1263
1264 if (net->features & NETIF_F_LRO) {
1265 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1266 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1267 } else {
1268 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1269 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1270 }
1271 }
1272
1273 /* In case some hw_features disappeared we need to remove them from
1274 * net->features list as they're no longer supported.
1275 */
1276 net->features &= ~NETVSC_SUPPORTED_HW_FEATURES | net->hw_features;
1277
1278 netif_set_gso_max_size(net, gso_max_size);
1279
1280 ret = rndis_filter_set_offload_params(net, nvdev, &offloads);
1281
1282 return ret;
1283 }
1284
1285 static void rndis_get_friendly_name(struct net_device *net,
1286 struct rndis_device *rndis_device,
1287 struct netvsc_device *net_device)
1288 {
1289 ucs2_char_t wname[256];
1290 unsigned long len;
1291 u8 ifalias[256];
1292 u32 size;
1293
1294 size = sizeof(wname);
1295 if (rndis_filter_query_device(rndis_device, net_device,
1296 RNDIS_OID_GEN_FRIENDLY_NAME,
1297 wname, &size) != 0)
1298 return; /* ignore if host does not support */
1299
1300 if (size == 0)
1301 return; /* name not set */
1302
1303 /* Convert Windows Unicode string to UTF-8 */
1304 len = ucs2_as_utf8(ifalias, wname, sizeof(ifalias));
1305
1306 /* ignore the default value from host */
1307 if (strcmp(ifalias, "Network Adapter") != 0)
1308 dev_set_alias(net, ifalias, len);
1309 }
1310
1311 struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
1312 struct netvsc_device_info *device_info)
1313 {
1314 struct net_device *net = hv_get_drvdata(dev);
1315 struct netvsc_device *net_device;
1316 struct rndis_device *rndis_device;
1317 struct ndis_recv_scale_cap rsscap;
1318 u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
1319 u32 mtu, size;
1320 u32 num_possible_rss_qs;
1321 int i, ret;
1322
1323 rndis_device = get_rndis_device();
1324 if (!rndis_device)
1325 return ERR_PTR(-ENODEV);
1326
1327 /* Let the inner driver handle this first to create the netvsc channel
1328 * NOTE! Once the channel is created, we may get a receive callback
1329 * (RndisFilterOnReceive()) before this call is completed
1330 */
1331 net_device = netvsc_device_add(dev, device_info);
1332 if (IS_ERR(net_device)) {
1333 kfree(rndis_device);
1334 return net_device;
1335 }
1336
1337 /* Initialize the rndis device */
1338 net_device->max_chn = 1;
1339 net_device->num_chn = 1;
1340
1341 net_device->extension = rndis_device;
1342 rndis_device->ndev = net;
1343
1344 /* Send the rndis initialization message */
1345 ret = rndis_filter_init_device(rndis_device, net_device);
1346 if (ret != 0)
1347 goto err_dev_remv;
1348
1349 /* Get the MTU from the host */
1350 size = sizeof(u32);
1351 ret = rndis_filter_query_device(rndis_device, net_device,
1352 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
1353 &mtu, &size);
1354 if (ret == 0 && size == sizeof(u32) && mtu < net->mtu)
1355 net->mtu = mtu;
1356
1357 /* Get the mac address */
1358 ret = rndis_filter_query_device_mac(rndis_device, net_device);
1359 if (ret != 0)
1360 goto err_dev_remv;
1361
1362 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
1363
1364 /* Get friendly name as ifalias*/
1365 if (!net->ifalias)
1366 rndis_get_friendly_name(net, rndis_device, net_device);
1367
1368 /* Query and set hardware capabilities */
1369 ret = rndis_netdev_set_hwcaps(rndis_device, net_device);
1370 if (ret != 0)
1371 goto err_dev_remv;
1372
1373 rndis_filter_query_device_link_status(rndis_device, net_device);
1374
1375 netdev_dbg(net, "Device MAC %pM link state %s\n",
1376 rndis_device->hw_mac_adr,
1377 rndis_device->link_state ? "down" : "up");
1378
1379 if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
1380 goto out;
1381
1382 rndis_filter_query_link_speed(rndis_device, net_device);
1383
1384 /* vRSS setup */
1385 memset(&rsscap, 0, rsscap_size);
1386 ret = rndis_filter_query_device(rndis_device, net_device,
1387 OID_GEN_RECEIVE_SCALE_CAPABILITIES,
1388 &rsscap, &rsscap_size);
1389 if (ret || rsscap.num_recv_que < 2)
1390 goto out;
1391
1392 /* This guarantees that num_possible_rss_qs <= num_online_cpus */
1393 num_possible_rss_qs = min_t(u32, num_online_cpus(),
1394 rsscap.num_recv_que);
1395
1396 net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, num_possible_rss_qs);
1397
1398 /* We will use the given number of channels if available. */
1399 net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
1400
1401 for (i = 0; i < ITAB_NUM; i++)
1402 rndis_device->rx_table[i] = ethtool_rxfh_indir_default(
1403 i, net_device->num_chn);
1404
1405 atomic_set(&net_device->open_chn, 1);
1406 vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
1407
1408 for (i = 1; i < net_device->num_chn; i++) {
1409 ret = netvsc_alloc_recv_comp_ring(net_device, i);
1410 if (ret) {
1411 while (--i != 0)
1412 vfree(net_device->chan_table[i].mrc.slots);
1413 goto out;
1414 }
1415 }
1416
1417 for (i = 1; i < net_device->num_chn; i++)
1418 netif_napi_add(net, &net_device->chan_table[i].napi,
1419 netvsc_poll, NAPI_POLL_WEIGHT);
1420
1421 return net_device;
1422
1423 out:
1424 /* setting up multiple channels failed */
1425 net_device->max_chn = 1;
1426 net_device->num_chn = 1;
1427 return net_device;
1428
1429 err_dev_remv:
1430 rndis_filter_device_remove(dev, net_device);
1431 return ERR_PTR(ret);
1432 }
1433
1434 void rndis_filter_device_remove(struct hv_device *dev,
1435 struct netvsc_device *net_dev)
1436 {
1437 struct rndis_device *rndis_dev = net_dev->extension;
1438
1439 /* Halt and release the rndis device */
1440 rndis_filter_halt_device(net_dev, rndis_dev);
1441
1442 net_dev->extension = NULL;
1443
1444 netvsc_device_remove(dev);
1445 }
1446
1447 int rndis_filter_open(struct netvsc_device *nvdev)
1448 {
1449 if (!nvdev)
1450 return -EINVAL;
1451
1452 return rndis_filter_open_device(nvdev->extension);
1453 }
1454
1455 int rndis_filter_close(struct netvsc_device *nvdev)
1456 {
1457 if (!nvdev)
1458 return -EINVAL;
1459
1460 return rndis_filter_close_device(nvdev->extension);
1461 }
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