2 * Copyright (c) 2009, Microsoft Corporation.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, see <http://www.gnu.org/licenses/>.
20 #include <linux/kernel.h>
21 #include <linux/sched.h>
22 #include <linux/wait.h>
23 #include <linux/highmem.h>
24 #include <linux/slab.h>
26 #include <linux/if_ether.h>
27 #include <linux/netdevice.h>
28 #include <linux/if_vlan.h>
29 #include <linux/nls.h>
31 #include "hyperv_net.h"
34 #define RNDIS_EXT_LEN 100
35 struct rndis_request {
36 struct list_head list_ent;
37 struct completion wait_event;
39 struct rndis_message response_msg;
41 * The buffer for extended info after the RNDIS response message. It's
42 * referenced based on the data offset in the RNDIS message. Its size
43 * is enough for current needs, and should be sufficient for the near
46 u8 response_ext[RNDIS_EXT_LEN];
48 /* Simplify allocation by having a netvsc packet inline */
49 struct hv_netvsc_packet pkt;
50 /* Set 2 pages for rndis requests crossing page boundary */
51 struct hv_page_buffer buf[2];
53 struct rndis_message request_msg;
55 * The buffer for the extended info after the RNDIS request message.
56 * It is referenced and sized in a similar way as response_ext.
58 u8 request_ext[RNDIS_EXT_LEN];
61 static struct rndis_device *get_rndis_device(void)
63 struct rndis_device *device;
65 device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
69 spin_lock_init(&device->request_lock);
71 INIT_LIST_HEAD(&device->req_list);
73 device->state = RNDIS_DEV_UNINITIALIZED;
78 static struct rndis_request *get_rndis_request(struct rndis_device *dev,
82 struct rndis_request *request;
83 struct rndis_message *rndis_msg;
84 struct rndis_set_request *set;
87 request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
91 init_completion(&request->wait_event);
93 rndis_msg = &request->request_msg;
94 rndis_msg->ndis_msg_type = msg_type;
95 rndis_msg->msg_len = msg_len;
98 * Set the request id. This field is always after the rndis header for
99 * request/response packet types so we just used the SetRequest as a
102 set = &rndis_msg->msg.set_req;
103 set->req_id = atomic_inc_return(&dev->new_req_id);
105 /* Add to the request list */
106 spin_lock_irqsave(&dev->request_lock, flags);
107 list_add_tail(&request->list_ent, &dev->req_list);
108 spin_unlock_irqrestore(&dev->request_lock, flags);
113 static void put_rndis_request(struct rndis_device *dev,
114 struct rndis_request *req)
118 spin_lock_irqsave(&dev->request_lock, flags);
119 list_del(&req->list_ent);
120 spin_unlock_irqrestore(&dev->request_lock, flags);
125 static void dump_rndis_message(struct hv_device *hv_dev,
126 struct rndis_message *rndis_msg)
128 struct net_device *netdev;
129 struct netvsc_device *net_device;
131 net_device = hv_get_drvdata(hv_dev);
132 netdev = net_device->ndev;
134 switch (rndis_msg->ndis_msg_type) {
135 case RNDIS_MSG_PACKET:
136 netdev_dbg(netdev, "RNDIS_MSG_PACKET (len %u, "
137 "data offset %u data len %u, # oob %u, "
138 "oob offset %u, oob len %u, pkt offset %u, "
141 rndis_msg->msg.pkt.data_offset,
142 rndis_msg->msg.pkt.data_len,
143 rndis_msg->msg.pkt.num_oob_data_elements,
144 rndis_msg->msg.pkt.oob_data_offset,
145 rndis_msg->msg.pkt.oob_data_len,
146 rndis_msg->msg.pkt.per_pkt_info_offset,
147 rndis_msg->msg.pkt.per_pkt_info_len);
150 case RNDIS_MSG_INIT_C:
151 netdev_dbg(netdev, "RNDIS_MSG_INIT_C "
152 "(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
153 "device flags %d, max xfer size 0x%x, max pkts %u, "
156 rndis_msg->msg.init_complete.req_id,
157 rndis_msg->msg.init_complete.status,
158 rndis_msg->msg.init_complete.major_ver,
159 rndis_msg->msg.init_complete.minor_ver,
160 rndis_msg->msg.init_complete.dev_flags,
161 rndis_msg->msg.init_complete.max_xfer_size,
162 rndis_msg->msg.init_complete.
164 rndis_msg->msg.init_complete.
165 pkt_alignment_factor);
168 case RNDIS_MSG_QUERY_C:
169 netdev_dbg(netdev, "RNDIS_MSG_QUERY_C "
170 "(len %u, id 0x%x, status 0x%x, buf len %u, "
173 rndis_msg->msg.query_complete.req_id,
174 rndis_msg->msg.query_complete.status,
175 rndis_msg->msg.query_complete.
177 rndis_msg->msg.query_complete.
181 case RNDIS_MSG_SET_C:
183 "RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
185 rndis_msg->msg.set_complete.req_id,
186 rndis_msg->msg.set_complete.status);
189 case RNDIS_MSG_INDICATE:
190 netdev_dbg(netdev, "RNDIS_MSG_INDICATE "
191 "(len %u, status 0x%x, buf len %u, buf offset %u)\n",
193 rndis_msg->msg.indicate_status.status,
194 rndis_msg->msg.indicate_status.status_buflen,
195 rndis_msg->msg.indicate_status.status_buf_offset);
199 netdev_dbg(netdev, "0x%x (len %u)\n",
200 rndis_msg->ndis_msg_type,
206 static int rndis_filter_send_request(struct rndis_device *dev,
207 struct rndis_request *req)
210 struct hv_netvsc_packet *packet;
212 /* Setup the packet to send it */
215 packet->is_data_pkt = false;
216 packet->total_data_buflen = req->request_msg.msg_len;
217 packet->page_buf_cnt = 1;
219 packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >>
221 packet->page_buf[0].len = req->request_msg.msg_len;
222 packet->page_buf[0].offset =
223 (unsigned long)&req->request_msg & (PAGE_SIZE - 1);
225 /* Add one page_buf when request_msg crossing page boundary */
226 if (packet->page_buf[0].offset + packet->page_buf[0].len > PAGE_SIZE) {
227 packet->page_buf_cnt++;
228 packet->page_buf[0].len = PAGE_SIZE -
229 packet->page_buf[0].offset;
230 packet->page_buf[1].pfn = virt_to_phys((void *)&req->request_msg
231 + packet->page_buf[0].len) >> PAGE_SHIFT;
232 packet->page_buf[1].offset = 0;
233 packet->page_buf[1].len = req->request_msg.msg_len -
234 packet->page_buf[0].len;
237 packet->completion.send.send_completion = NULL;
239 ret = netvsc_send(dev->net_dev->dev, packet);
243 static void rndis_set_link_state(struct rndis_device *rdev,
244 struct rndis_request *request)
247 struct rndis_query_complete *query_complete;
249 query_complete = &request->response_msg.msg.query_complete;
251 if (query_complete->status == RNDIS_STATUS_SUCCESS &&
252 query_complete->info_buflen == sizeof(u32)) {
253 memcpy(&link_status, (void *)((unsigned long)query_complete +
254 query_complete->info_buf_offset), sizeof(u32));
255 rdev->link_state = link_status != 0;
259 static void rndis_filter_receive_response(struct rndis_device *dev,
260 struct rndis_message *resp)
262 struct rndis_request *request = NULL;
265 struct net_device *ndev;
267 ndev = dev->net_dev->ndev;
269 spin_lock_irqsave(&dev->request_lock, flags);
270 list_for_each_entry(request, &dev->req_list, list_ent) {
272 * All request/response message contains RequestId as the 1st
275 if (request->request_msg.msg.init_req.req_id
276 == resp->msg.init_complete.req_id) {
281 spin_unlock_irqrestore(&dev->request_lock, flags);
285 sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
286 memcpy(&request->response_msg, resp,
288 if (request->request_msg.ndis_msg_type ==
289 RNDIS_MSG_QUERY && request->request_msg.msg.
290 query_req.oid == RNDIS_OID_GEN_MEDIA_CONNECT_STATUS)
291 rndis_set_link_state(dev, request);
294 "rndis response buffer overflow "
295 "detected (size %u max %zu)\n",
297 sizeof(struct rndis_message));
299 if (resp->ndis_msg_type ==
301 /* does not have a request id field */
302 request->response_msg.msg.reset_complete.
303 status = RNDIS_STATUS_BUFFER_OVERFLOW;
305 request->response_msg.msg.
306 init_complete.status =
307 RNDIS_STATUS_BUFFER_OVERFLOW;
311 complete(&request->wait_event);
314 "no rndis request found for this response "
315 "(id 0x%x res type 0x%x)\n",
316 resp->msg.init_complete.req_id,
317 resp->ndis_msg_type);
321 static void rndis_filter_receive_indicate_status(struct rndis_device *dev,
322 struct rndis_message *resp)
324 struct rndis_indicate_status *indicate =
325 &resp->msg.indicate_status;
327 if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT) {
328 netvsc_linkstatus_callback(
329 dev->net_dev->dev, 1);
330 } else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT) {
331 netvsc_linkstatus_callback(
332 dev->net_dev->dev, 0);
341 * Get the Per-Packet-Info with the specified type
342 * return NULL if not found.
344 static inline void *rndis_get_ppi(struct rndis_packet *rpkt, u32 type)
346 struct rndis_per_packet_info *ppi;
349 if (rpkt->per_pkt_info_offset == 0)
352 ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
353 rpkt->per_pkt_info_offset);
354 len = rpkt->per_pkt_info_len;
357 if (ppi->type == type)
358 return (void *)((ulong)ppi + ppi->ppi_offset);
360 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
366 static void rndis_filter_receive_data(struct rndis_device *dev,
367 struct rndis_message *msg,
368 struct hv_netvsc_packet *pkt)
370 struct rndis_packet *rndis_pkt;
372 struct ndis_pkt_8021q_info *vlan;
373 struct ndis_tcp_ip_checksum_info *csum_info;
375 rndis_pkt = &msg->msg.pkt;
377 /* Remove the rndis header and pass it back up the stack */
378 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
380 pkt->total_data_buflen -= data_offset;
383 * Make sure we got a valid RNDIS message, now total_data_buflen
384 * should be the data packet size plus the trailer padding size
386 if (pkt->total_data_buflen < rndis_pkt->data_len) {
387 netdev_err(dev->net_dev->ndev, "rndis message buffer "
388 "overflow detected (got %u, min %u)"
389 "...dropping this message!\n",
390 pkt->total_data_buflen, rndis_pkt->data_len);
395 * Remove the rndis trailer padding from rndis packet message
396 * rndis_pkt->data_len tell us the real data length, we only copy
397 * the data packet to the stack, without the rndis trailer padding
399 pkt->total_data_buflen = rndis_pkt->data_len;
400 pkt->data = (void *)((unsigned long)pkt->data + data_offset);
402 pkt->is_data_pkt = true;
404 vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO);
406 pkt->vlan_tci = VLAN_TAG_PRESENT | vlan->vlanid |
407 (vlan->pri << VLAN_PRIO_SHIFT);
412 csum_info = rndis_get_ppi(rndis_pkt, TCPIP_CHKSUM_PKTINFO);
413 netvsc_recv_callback(dev->net_dev->dev, pkt, csum_info);
416 int rndis_filter_receive(struct hv_device *dev,
417 struct hv_netvsc_packet *pkt)
419 struct netvsc_device *net_dev = hv_get_drvdata(dev);
420 struct rndis_device *rndis_dev;
421 struct rndis_message *rndis_msg;
422 struct net_device *ndev;
430 ndev = net_dev->ndev;
432 /* Make sure the rndis device state is initialized */
433 if (!net_dev->extension) {
434 netdev_err(ndev, "got rndis message but no rndis device - "
435 "dropping this message!\n");
440 rndis_dev = (struct rndis_device *)net_dev->extension;
441 if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) {
442 netdev_err(ndev, "got rndis message but rndis device "
443 "uninitialized...dropping this message!\n");
448 rndis_msg = pkt->data;
450 dump_rndis_message(dev, rndis_msg);
452 switch (rndis_msg->ndis_msg_type) {
453 case RNDIS_MSG_PACKET:
455 rndis_filter_receive_data(rndis_dev, rndis_msg, pkt);
458 case RNDIS_MSG_INIT_C:
459 case RNDIS_MSG_QUERY_C:
460 case RNDIS_MSG_SET_C:
461 /* completion msgs */
462 rndis_filter_receive_response(rndis_dev, rndis_msg);
465 case RNDIS_MSG_INDICATE:
466 /* notification msgs */
467 rndis_filter_receive_indicate_status(rndis_dev, rndis_msg);
471 "unhandled rndis message (type %u len %u)\n",
472 rndis_msg->ndis_msg_type,
479 pkt->status = NVSP_STAT_FAIL;
484 static int rndis_filter_query_device(struct rndis_device *dev, u32 oid,
485 void *result, u32 *result_size)
487 struct rndis_request *request;
488 u32 inresult_size = *result_size;
489 struct rndis_query_request *query;
490 struct rndis_query_complete *query_complete;
498 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
499 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
505 /* Setup the rndis query */
506 query = &request->request_msg.msg.query_req;
508 query->info_buf_offset = sizeof(struct rndis_query_request);
509 query->info_buflen = 0;
510 query->dev_vc_handle = 0;
512 ret = rndis_filter_send_request(dev, request);
516 t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
522 /* Copy the response back */
523 query_complete = &request->response_msg.msg.query_complete;
525 if (query_complete->info_buflen > inresult_size) {
531 (void *)((unsigned long)query_complete +
532 query_complete->info_buf_offset),
533 query_complete->info_buflen);
535 *result_size = query_complete->info_buflen;
539 put_rndis_request(dev, request);
544 static int rndis_filter_query_device_mac(struct rndis_device *dev)
548 return rndis_filter_query_device(dev,
549 RNDIS_OID_802_3_PERMANENT_ADDRESS,
550 dev->hw_mac_adr, &size);
553 #define NWADR_STR "NetworkAddress"
554 #define NWADR_STRLEN 14
556 int rndis_filter_set_device_mac(struct hv_device *hdev, char *mac)
558 struct netvsc_device *nvdev = hv_get_drvdata(hdev);
559 struct rndis_device *rdev = nvdev->extension;
560 struct net_device *ndev = nvdev->ndev;
561 struct rndis_request *request;
562 struct rndis_set_request *set;
563 struct rndis_config_parameter_info *cpi;
564 wchar_t *cfg_nwadr, *cfg_mac;
565 struct rndis_set_complete *set_complete;
566 char macstr[2*ETH_ALEN+1];
567 u32 extlen = sizeof(struct rndis_config_parameter_info) +
568 2*NWADR_STRLEN + 4*ETH_ALEN;
571 request = get_rndis_request(rdev, RNDIS_MSG_SET,
572 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
576 set = &request->request_msg.msg.set_req;
577 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
578 set->info_buflen = extlen;
579 set->info_buf_offset = sizeof(struct rndis_set_request);
580 set->dev_vc_handle = 0;
582 cpi = (struct rndis_config_parameter_info *)((ulong)set +
583 set->info_buf_offset);
584 cpi->parameter_name_offset =
585 sizeof(struct rndis_config_parameter_info);
586 /* Multiply by 2 because host needs 2 bytes (utf16) for each char */
587 cpi->parameter_name_length = 2*NWADR_STRLEN;
588 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
589 cpi->parameter_value_offset =
590 cpi->parameter_name_offset + cpi->parameter_name_length;
591 /* Multiply by 4 because each MAC byte displayed as 2 utf16 chars */
592 cpi->parameter_value_length = 4*ETH_ALEN;
594 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
595 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
596 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
597 cfg_nwadr, NWADR_STRLEN);
600 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
601 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
602 cfg_mac, 2*ETH_ALEN);
606 ret = rndis_filter_send_request(rdev, request);
610 t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
612 netdev_err(ndev, "timeout before we got a set response...\n");
614 * can't put_rndis_request, since we may still receive a
619 set_complete = &request->response_msg.msg.set_complete;
620 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
621 netdev_err(ndev, "Fail to set MAC on host side:0x%x\n",
622 set_complete->status);
628 put_rndis_request(rdev, request);
632 int rndis_filter_set_offload_params(struct hv_device *hdev,
633 struct ndis_offload_params *req_offloads)
635 struct netvsc_device *nvdev = hv_get_drvdata(hdev);
636 struct rndis_device *rdev = nvdev->extension;
637 struct net_device *ndev = nvdev->ndev;
638 struct rndis_request *request;
639 struct rndis_set_request *set;
640 struct ndis_offload_params *offload_params;
641 struct rndis_set_complete *set_complete;
642 u32 extlen = sizeof(struct ndis_offload_params);
644 u32 vsp_version = nvdev->nvsp_version;
646 if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
647 extlen = VERSION_4_OFFLOAD_SIZE;
648 /* On NVSP_PROTOCOL_VERSION_4 and below, we do not support
649 * UDP checksum offload.
651 req_offloads->udp_ip_v4_csum = 0;
652 req_offloads->udp_ip_v6_csum = 0;
655 request = get_rndis_request(rdev, RNDIS_MSG_SET,
656 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
660 set = &request->request_msg.msg.set_req;
661 set->oid = OID_TCP_OFFLOAD_PARAMETERS;
662 set->info_buflen = extlen;
663 set->info_buf_offset = sizeof(struct rndis_set_request);
664 set->dev_vc_handle = 0;
666 offload_params = (struct ndis_offload_params *)((ulong)set +
667 set->info_buf_offset);
668 *offload_params = *req_offloads;
669 offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
670 offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
671 offload_params->header.size = extlen;
673 ret = rndis_filter_send_request(rdev, request);
677 t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
679 netdev_err(ndev, "timeout before we got aOFFLOAD set response...\n");
680 /* can't put_rndis_request, since we may still receive a
685 set_complete = &request->response_msg.msg.set_complete;
686 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
687 netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
688 set_complete->status);
694 put_rndis_request(rdev, request);
698 static int rndis_filter_query_device_link_status(struct rndis_device *dev)
700 u32 size = sizeof(u32);
704 ret = rndis_filter_query_device(dev,
705 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
706 &link_status, &size);
711 int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter)
713 struct rndis_request *request;
714 struct rndis_set_request *set;
715 struct rndis_set_complete *set_complete;
718 struct net_device *ndev;
720 ndev = dev->net_dev->ndev;
722 request = get_rndis_request(dev, RNDIS_MSG_SET,
723 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
730 /* Setup the rndis set */
731 set = &request->request_msg.msg.set_req;
732 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
733 set->info_buflen = sizeof(u32);
734 set->info_buf_offset = sizeof(struct rndis_set_request);
736 memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
737 &new_filter, sizeof(u32));
739 ret = rndis_filter_send_request(dev, request);
743 t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
747 "timeout before we got a set response...\n");
750 * We can't deallocate the request since we may still receive a
751 * send completion for it.
755 set_complete = &request->response_msg.msg.set_complete;
756 status = set_complete->status;
761 put_rndis_request(dev, request);
767 static int rndis_filter_init_device(struct rndis_device *dev)
769 struct rndis_request *request;
770 struct rndis_initialize_request *init;
771 struct rndis_initialize_complete *init_complete;
775 request = get_rndis_request(dev, RNDIS_MSG_INIT,
776 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
782 /* Setup the rndis set */
783 init = &request->request_msg.msg.init_req;
784 init->major_ver = RNDIS_MAJOR_VERSION;
785 init->minor_ver = RNDIS_MINOR_VERSION;
786 init->max_xfer_size = 0x4000;
788 dev->state = RNDIS_DEV_INITIALIZING;
790 ret = rndis_filter_send_request(dev, request);
792 dev->state = RNDIS_DEV_UNINITIALIZED;
797 t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
804 init_complete = &request->response_msg.msg.init_complete;
805 status = init_complete->status;
806 if (status == RNDIS_STATUS_SUCCESS) {
807 dev->state = RNDIS_DEV_INITIALIZED;
810 dev->state = RNDIS_DEV_UNINITIALIZED;
816 put_rndis_request(dev, request);
821 static void rndis_filter_halt_device(struct rndis_device *dev)
823 struct rndis_request *request;
824 struct rndis_halt_request *halt;
825 struct netvsc_device *nvdev = dev->net_dev;
826 struct hv_device *hdev = nvdev->dev;
829 /* Attempt to do a rndis device halt */
830 request = get_rndis_request(dev, RNDIS_MSG_HALT,
831 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
835 /* Setup the rndis set */
836 halt = &request->request_msg.msg.halt_req;
837 halt->req_id = atomic_inc_return(&dev->new_req_id);
839 /* Ignore return since this msg is optional. */
840 rndis_filter_send_request(dev, request);
842 dev->state = RNDIS_DEV_UNINITIALIZED;
845 spin_lock_irqsave(&hdev->channel->inbound_lock, flags);
846 nvdev->destroy = true;
847 spin_unlock_irqrestore(&hdev->channel->inbound_lock, flags);
849 /* Wait for all send completions */
850 wait_event(nvdev->wait_drain,
851 atomic_read(&nvdev->num_outstanding_sends) == 0);
854 put_rndis_request(dev, request);
858 static int rndis_filter_open_device(struct rndis_device *dev)
862 if (dev->state != RNDIS_DEV_INITIALIZED)
865 ret = rndis_filter_set_packet_filter(dev,
866 NDIS_PACKET_TYPE_BROADCAST |
867 NDIS_PACKET_TYPE_ALL_MULTICAST |
868 NDIS_PACKET_TYPE_DIRECTED);
870 dev->state = RNDIS_DEV_DATAINITIALIZED;
875 static int rndis_filter_close_device(struct rndis_device *dev)
879 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
882 ret = rndis_filter_set_packet_filter(dev, 0);
884 dev->state = RNDIS_DEV_INITIALIZED;
889 int rndis_filter_device_add(struct hv_device *dev,
890 void *additional_info)
893 struct netvsc_device *net_device;
894 struct rndis_device *rndis_device;
895 struct netvsc_device_info *device_info = additional_info;
896 struct ndis_offload_params offloads;
898 rndis_device = get_rndis_device();
903 * Let the inner driver handle this first to create the netvsc channel
904 * NOTE! Once the channel is created, we may get a receive callback
905 * (RndisFilterOnReceive()) before this call is completed
907 ret = netvsc_device_add(dev, additional_info);
914 /* Initialize the rndis device */
915 net_device = hv_get_drvdata(dev);
917 net_device->extension = rndis_device;
918 rndis_device->net_dev = net_device;
920 /* Send the rndis initialization message */
921 ret = rndis_filter_init_device(rndis_device);
923 rndis_filter_device_remove(dev);
927 /* Get the mac address */
928 ret = rndis_filter_query_device_mac(rndis_device);
930 rndis_filter_device_remove(dev);
934 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
936 /* Turn on the offloads; the host supports all of the relevant
939 memset(&offloads, 0, sizeof(struct ndis_offload_params));
940 /* A value of zero means "no change"; now turn on what we
943 offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
944 offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
945 offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
946 offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
947 offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
948 offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
951 ret = rndis_filter_set_offload_params(dev, &offloads);
956 rndis_filter_query_device_link_status(rndis_device);
958 device_info->link_state = rndis_device->link_state;
960 dev_info(&dev->device, "Device MAC %pM link state %s\n",
961 rndis_device->hw_mac_adr,
962 device_info->link_state ? "down" : "up");
967 rndis_filter_device_remove(dev);
971 void rndis_filter_device_remove(struct hv_device *dev)
973 struct netvsc_device *net_dev = hv_get_drvdata(dev);
974 struct rndis_device *rndis_dev = net_dev->extension;
976 /* Halt and release the rndis device */
977 rndis_filter_halt_device(rndis_dev);
980 net_dev->extension = NULL;
982 netvsc_device_remove(dev);
986 int rndis_filter_open(struct hv_device *dev)
988 struct netvsc_device *net_device = hv_get_drvdata(dev);
993 return rndis_filter_open_device(net_device->extension);
996 int rndis_filter_close(struct hv_device *dev)
998 struct netvsc_device *nvdev = hv_get_drvdata(dev);
1003 return rndis_filter_close_device(nvdev->extension);