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, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307 USA.
18 * Haiyang Zhang <haiyangz@microsoft.com>
19 * Hank Janssen <hjanssen@microsoft.com>
21 #include <linux/kernel.h>
22 #include <linux/sched.h>
23 #include <linux/wait.h>
24 #include <linux/highmem.h>
25 #include <linux/slab.h>
27 #include <linux/if_ether.h>
28 #include <linux/netdevice.h>
29 #include <linux/if_vlan.h>
30 #include <linux/nls.h>
32 #include "hyperv_net.h"
35 struct rndis_request {
36 struct list_head list_ent;
37 struct completion wait_event;
40 * FIXME: We assumed a fixed size response here. If we do ever need to
41 * handle a bigger response, we can either define a max response
42 * message or add a response buffer variable above this field
44 struct rndis_message response_msg;
46 /* Simplify allocation by having a netvsc packet inline */
47 struct hv_netvsc_packet pkt;
48 struct hv_page_buffer buf;
49 /* FIXME: We assumed a fixed size request here. */
50 struct rndis_message request_msg;
54 static void rndis_filter_send_completion(void *ctx);
56 static void rndis_filter_send_request_completion(void *ctx);
60 static struct rndis_device *get_rndis_device(void)
62 struct rndis_device *device;
64 device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
68 spin_lock_init(&device->request_lock);
70 INIT_LIST_HEAD(&device->req_list);
72 device->state = RNDIS_DEV_UNINITIALIZED;
77 static struct rndis_request *get_rndis_request(struct rndis_device *dev,
81 struct rndis_request *request;
82 struct rndis_message *rndis_msg;
83 struct rndis_set_request *set;
86 request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
90 init_completion(&request->wait_event);
92 rndis_msg = &request->request_msg;
93 rndis_msg->ndis_msg_type = msg_type;
94 rndis_msg->msg_len = msg_len;
97 * Set the request id. This field is always after the rndis header for
98 * request/response packet types so we just used the SetRequest as a
101 set = &rndis_msg->msg.set_req;
102 set->req_id = atomic_inc_return(&dev->new_req_id);
104 /* Add to the request list */
105 spin_lock_irqsave(&dev->request_lock, flags);
106 list_add_tail(&request->list_ent, &dev->req_list);
107 spin_unlock_irqrestore(&dev->request_lock, flags);
112 static void put_rndis_request(struct rndis_device *dev,
113 struct rndis_request *req)
117 spin_lock_irqsave(&dev->request_lock, flags);
118 list_del(&req->list_ent);
119 spin_unlock_irqrestore(&dev->request_lock, flags);
124 static void dump_rndis_message(struct hv_device *hv_dev,
125 struct rndis_message *rndis_msg)
127 struct net_device *netdev;
128 struct netvsc_device *net_device;
130 net_device = hv_get_drvdata(hv_dev);
131 netdev = net_device->ndev;
133 switch (rndis_msg->ndis_msg_type) {
134 case RNDIS_MSG_PACKET:
135 netdev_dbg(netdev, "RNDIS_MSG_PACKET (len %u, "
136 "data offset %u data len %u, # oob %u, "
137 "oob offset %u, oob len %u, pkt offset %u, "
140 rndis_msg->msg.pkt.data_offset,
141 rndis_msg->msg.pkt.data_len,
142 rndis_msg->msg.pkt.num_oob_data_elements,
143 rndis_msg->msg.pkt.oob_data_offset,
144 rndis_msg->msg.pkt.oob_data_len,
145 rndis_msg->msg.pkt.per_pkt_info_offset,
146 rndis_msg->msg.pkt.per_pkt_info_len);
149 case RNDIS_MSG_INIT_C:
150 netdev_dbg(netdev, "RNDIS_MSG_INIT_C "
151 "(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
152 "device flags %d, max xfer size 0x%x, max pkts %u, "
155 rndis_msg->msg.init_complete.req_id,
156 rndis_msg->msg.init_complete.status,
157 rndis_msg->msg.init_complete.major_ver,
158 rndis_msg->msg.init_complete.minor_ver,
159 rndis_msg->msg.init_complete.dev_flags,
160 rndis_msg->msg.init_complete.max_xfer_size,
161 rndis_msg->msg.init_complete.
163 rndis_msg->msg.init_complete.
164 pkt_alignment_factor);
167 case RNDIS_MSG_QUERY_C:
168 netdev_dbg(netdev, "RNDIS_MSG_QUERY_C "
169 "(len %u, id 0x%x, status 0x%x, buf len %u, "
172 rndis_msg->msg.query_complete.req_id,
173 rndis_msg->msg.query_complete.status,
174 rndis_msg->msg.query_complete.
176 rndis_msg->msg.query_complete.
180 case RNDIS_MSG_SET_C:
182 "RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
184 rndis_msg->msg.set_complete.req_id,
185 rndis_msg->msg.set_complete.status);
188 case RNDIS_MSG_INDICATE:
189 netdev_dbg(netdev, "RNDIS_MSG_INDICATE "
190 "(len %u, status 0x%x, buf len %u, buf offset %u)\n",
192 rndis_msg->msg.indicate_status.status,
193 rndis_msg->msg.indicate_status.status_buflen,
194 rndis_msg->msg.indicate_status.status_buf_offset);
198 netdev_dbg(netdev, "0x%x (len %u)\n",
199 rndis_msg->ndis_msg_type,
205 static int rndis_filter_send_request(struct rndis_device *dev,
206 struct rndis_request *req)
209 struct hv_netvsc_packet *packet;
211 /* Setup the packet to send it */
214 packet->is_data_pkt = false;
215 packet->total_data_buflen = req->request_msg.msg_len;
216 packet->page_buf_cnt = 1;
218 packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >>
220 packet->page_buf[0].len = req->request_msg.msg_len;
221 packet->page_buf[0].offset =
222 (unsigned long)&req->request_msg & (PAGE_SIZE - 1);
224 packet->completion.send.send_completion_ctx = req;/* packet; */
225 packet->completion.send.send_completion =
226 rndis_filter_send_request_completion;
227 packet->completion.send.send_completion_tid = (unsigned long)dev;
229 ret = netvsc_send(dev->net_dev->dev, packet);
233 static void rndis_filter_receive_response(struct rndis_device *dev,
234 struct rndis_message *resp)
236 struct rndis_request *request = NULL;
239 struct net_device *ndev;
241 ndev = dev->net_dev->ndev;
243 spin_lock_irqsave(&dev->request_lock, flags);
244 list_for_each_entry(request, &dev->req_list, list_ent) {
246 * All request/response message contains RequestId as the 1st
249 if (request->request_msg.msg.init_req.req_id
250 == resp->msg.init_complete.req_id) {
255 spin_unlock_irqrestore(&dev->request_lock, flags);
258 if (resp->msg_len <= sizeof(struct rndis_message)) {
259 memcpy(&request->response_msg, resp,
263 "rndis response buffer overflow "
264 "detected (size %u max %zu)\n",
266 sizeof(struct rndis_filter_packet));
268 if (resp->ndis_msg_type ==
270 /* does not have a request id field */
271 request->response_msg.msg.reset_complete.
272 status = RNDIS_STATUS_BUFFER_OVERFLOW;
274 request->response_msg.msg.
275 init_complete.status =
276 RNDIS_STATUS_BUFFER_OVERFLOW;
280 complete(&request->wait_event);
283 "no rndis request found for this response "
284 "(id 0x%x res type 0x%x)\n",
285 resp->msg.init_complete.req_id,
286 resp->ndis_msg_type);
290 static void rndis_filter_receive_indicate_status(struct rndis_device *dev,
291 struct rndis_message *resp)
293 struct rndis_indicate_status *indicate =
294 &resp->msg.indicate_status;
296 if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT) {
297 netvsc_linkstatus_callback(
298 dev->net_dev->dev, 1);
299 } else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT) {
300 netvsc_linkstatus_callback(
301 dev->net_dev->dev, 0);
310 * Get the Per-Packet-Info with the specified type
311 * return NULL if not found.
313 static inline void *rndis_get_ppi(struct rndis_packet *rpkt, u32 type)
315 struct rndis_per_packet_info *ppi;
318 if (rpkt->per_pkt_info_offset == 0)
321 ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
322 rpkt->per_pkt_info_offset);
323 len = rpkt->per_pkt_info_len;
326 if (ppi->type == type)
327 return (void *)((ulong)ppi + ppi->ppi_offset);
329 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
335 static void rndis_filter_receive_data(struct rndis_device *dev,
336 struct rndis_message *msg,
337 struct hv_netvsc_packet *pkt)
339 struct rndis_packet *rndis_pkt;
341 struct ndis_pkt_8021q_info *vlan;
343 rndis_pkt = &msg->msg.pkt;
346 * FIXME: Handle multiple rndis pkt msgs that maybe enclosed in this
347 * netvsc packet (ie TotalDataBufferLength != MessageLength)
350 /* Remove the rndis header and pass it back up the stack */
351 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
353 pkt->total_data_buflen -= data_offset;
356 * Make sure we got a valid RNDIS message, now total_data_buflen
357 * should be the data packet size plus the trailer padding size
359 if (pkt->total_data_buflen < rndis_pkt->data_len) {
360 netdev_err(dev->net_dev->ndev, "rndis message buffer "
361 "overflow detected (got %u, min %u)"
362 "...dropping this message!\n",
363 pkt->total_data_buflen, rndis_pkt->data_len);
368 * Remove the rndis trailer padding from rndis packet message
369 * rndis_pkt->data_len tell us the real data length, we only copy
370 * the data packet to the stack, without the rndis trailer padding
372 pkt->total_data_buflen = rndis_pkt->data_len;
373 pkt->data = (void *)((unsigned long)pkt->data + data_offset);
375 pkt->is_data_pkt = true;
377 vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO);
379 pkt->vlan_tci = VLAN_TAG_PRESENT | vlan->vlanid |
380 (vlan->pri << VLAN_PRIO_SHIFT);
385 netvsc_recv_callback(dev->net_dev->dev, pkt);
388 int rndis_filter_receive(struct hv_device *dev,
389 struct hv_netvsc_packet *pkt)
391 struct netvsc_device *net_dev = hv_get_drvdata(dev);
392 struct rndis_device *rndis_dev;
393 struct rndis_message *rndis_msg;
394 struct net_device *ndev;
399 ndev = net_dev->ndev;
401 /* Make sure the rndis device state is initialized */
402 if (!net_dev->extension) {
403 netdev_err(ndev, "got rndis message but no rndis device - "
404 "dropping this message!\n");
408 rndis_dev = (struct rndis_device *)net_dev->extension;
409 if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) {
410 netdev_err(ndev, "got rndis message but rndis device "
411 "uninitialized...dropping this message!\n");
415 rndis_msg = pkt->data;
417 dump_rndis_message(dev, rndis_msg);
419 switch (rndis_msg->ndis_msg_type) {
420 case RNDIS_MSG_PACKET:
422 rndis_filter_receive_data(rndis_dev, rndis_msg, pkt);
425 case RNDIS_MSG_INIT_C:
426 case RNDIS_MSG_QUERY_C:
427 case RNDIS_MSG_SET_C:
428 /* completion msgs */
429 rndis_filter_receive_response(rndis_dev, rndis_msg);
432 case RNDIS_MSG_INDICATE:
433 /* notification msgs */
434 rndis_filter_receive_indicate_status(rndis_dev, rndis_msg);
438 "unhandled rndis message (type %u len %u)\n",
439 rndis_msg->ndis_msg_type,
447 static int rndis_filter_query_device(struct rndis_device *dev, u32 oid,
448 void *result, u32 *result_size)
450 struct rndis_request *request;
451 u32 inresult_size = *result_size;
452 struct rndis_query_request *query;
453 struct rndis_query_complete *query_complete;
461 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
462 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
468 /* Setup the rndis query */
469 query = &request->request_msg.msg.query_req;
471 query->info_buf_offset = sizeof(struct rndis_query_request);
472 query->info_buflen = 0;
473 query->dev_vc_handle = 0;
475 ret = rndis_filter_send_request(dev, request);
479 t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
485 /* Copy the response back */
486 query_complete = &request->response_msg.msg.query_complete;
488 if (query_complete->info_buflen > inresult_size) {
494 (void *)((unsigned long)query_complete +
495 query_complete->info_buf_offset),
496 query_complete->info_buflen);
498 *result_size = query_complete->info_buflen;
502 put_rndis_request(dev, request);
507 static int rndis_filter_query_device_mac(struct rndis_device *dev)
511 return rndis_filter_query_device(dev,
512 RNDIS_OID_802_3_PERMANENT_ADDRESS,
513 dev->hw_mac_adr, &size);
516 #define NWADR_STR "NetworkAddress"
517 #define NWADR_STRLEN 14
519 int rndis_filter_set_device_mac(struct hv_device *hdev, char *mac)
521 struct netvsc_device *nvdev = hv_get_drvdata(hdev);
522 struct rndis_device *rdev = nvdev->extension;
523 struct net_device *ndev = nvdev->ndev;
524 struct rndis_request *request;
525 struct rndis_set_request *set;
526 struct rndis_config_parameter_info *cpi;
527 wchar_t *cfg_nwadr, *cfg_mac;
528 struct rndis_set_complete *set_complete;
529 char macstr[2*ETH_ALEN+1];
530 u32 extlen = sizeof(struct rndis_config_parameter_info) +
531 2*NWADR_STRLEN + 4*ETH_ALEN;
534 request = get_rndis_request(rdev, RNDIS_MSG_SET,
535 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
539 set = &request->request_msg.msg.set_req;
540 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
541 set->info_buflen = extlen;
542 set->info_buf_offset = sizeof(struct rndis_set_request);
543 set->dev_vc_handle = 0;
545 cpi = (struct rndis_config_parameter_info *)((ulong)set +
546 set->info_buf_offset);
547 cpi->parameter_name_offset =
548 sizeof(struct rndis_config_parameter_info);
549 /* Multiply by 2 because host needs 2 bytes (utf16) for each char */
550 cpi->parameter_name_length = 2*NWADR_STRLEN;
551 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
552 cpi->parameter_value_offset =
553 cpi->parameter_name_offset + cpi->parameter_name_length;
554 /* Multiply by 4 because each MAC byte displayed as 2 utf16 chars */
555 cpi->parameter_value_length = 4*ETH_ALEN;
557 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
558 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
559 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
560 cfg_nwadr, NWADR_STRLEN);
563 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
564 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
565 cfg_mac, 2*ETH_ALEN);
569 ret = rndis_filter_send_request(rdev, request);
573 t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
575 netdev_err(ndev, "timeout before we got a set response...\n");
577 * can't put_rndis_request, since we may still receive a
582 set_complete = &request->response_msg.msg.set_complete;
583 if (set_complete->status != RNDIS_STATUS_SUCCESS)
588 put_rndis_request(rdev, request);
593 static int rndis_filter_query_device_link_status(struct rndis_device *dev)
595 u32 size = sizeof(u32);
599 ret = rndis_filter_query_device(dev,
600 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
601 &link_status, &size);
602 dev->link_state = (link_status != 0) ? true : false;
607 int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter)
609 struct rndis_request *request;
610 struct rndis_set_request *set;
611 struct rndis_set_complete *set_complete;
614 struct net_device *ndev;
616 ndev = dev->net_dev->ndev;
618 request = get_rndis_request(dev, RNDIS_MSG_SET,
619 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
626 /* Setup the rndis set */
627 set = &request->request_msg.msg.set_req;
628 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
629 set->info_buflen = sizeof(u32);
630 set->info_buf_offset = sizeof(struct rndis_set_request);
632 memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
633 &new_filter, sizeof(u32));
635 ret = rndis_filter_send_request(dev, request);
639 t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
643 "timeout before we got a set response...\n");
645 * We can't deallocate the request since we may still receive a
646 * send completion for it.
650 set_complete = &request->response_msg.msg.set_complete;
651 status = set_complete->status;
656 put_rndis_request(dev, request);
662 static int rndis_filter_init_device(struct rndis_device *dev)
664 struct rndis_request *request;
665 struct rndis_initialize_request *init;
666 struct rndis_initialize_complete *init_complete;
670 request = get_rndis_request(dev, RNDIS_MSG_INIT,
671 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
677 /* Setup the rndis set */
678 init = &request->request_msg.msg.init_req;
679 init->major_ver = RNDIS_MAJOR_VERSION;
680 init->minor_ver = RNDIS_MINOR_VERSION;
681 /* FIXME: Use 1536 - rounded ethernet frame size */
682 init->max_xfer_size = 2048;
684 dev->state = RNDIS_DEV_INITIALIZING;
686 ret = rndis_filter_send_request(dev, request);
688 dev->state = RNDIS_DEV_UNINITIALIZED;
693 t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
700 init_complete = &request->response_msg.msg.init_complete;
701 status = init_complete->status;
702 if (status == RNDIS_STATUS_SUCCESS) {
703 dev->state = RNDIS_DEV_INITIALIZED;
706 dev->state = RNDIS_DEV_UNINITIALIZED;
712 put_rndis_request(dev, request);
717 static void rndis_filter_halt_device(struct rndis_device *dev)
719 struct rndis_request *request;
720 struct rndis_halt_request *halt;
722 /* Attempt to do a rndis device halt */
723 request = get_rndis_request(dev, RNDIS_MSG_HALT,
724 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
728 /* Setup the rndis set */
729 halt = &request->request_msg.msg.halt_req;
730 halt->req_id = atomic_inc_return(&dev->new_req_id);
732 /* Ignore return since this msg is optional. */
733 rndis_filter_send_request(dev, request);
735 dev->state = RNDIS_DEV_UNINITIALIZED;
739 put_rndis_request(dev, request);
743 static int rndis_filter_open_device(struct rndis_device *dev)
747 if (dev->state != RNDIS_DEV_INITIALIZED)
750 ret = rndis_filter_set_packet_filter(dev,
751 NDIS_PACKET_TYPE_BROADCAST |
752 NDIS_PACKET_TYPE_ALL_MULTICAST |
753 NDIS_PACKET_TYPE_DIRECTED);
755 dev->state = RNDIS_DEV_DATAINITIALIZED;
760 static int rndis_filter_close_device(struct rndis_device *dev)
764 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
767 ret = rndis_filter_set_packet_filter(dev, 0);
769 dev->state = RNDIS_DEV_INITIALIZED;
774 int rndis_filter_device_add(struct hv_device *dev,
775 void *additional_info)
778 struct netvsc_device *net_device;
779 struct rndis_device *rndis_device;
780 struct netvsc_device_info *device_info = additional_info;
782 rndis_device = get_rndis_device();
787 * Let the inner driver handle this first to create the netvsc channel
788 * NOTE! Once the channel is created, we may get a receive callback
789 * (RndisFilterOnReceive()) before this call is completed
791 ret = netvsc_device_add(dev, additional_info);
798 /* Initialize the rndis device */
799 net_device = hv_get_drvdata(dev);
801 net_device->extension = rndis_device;
802 rndis_device->net_dev = net_device;
804 /* Send the rndis initialization message */
805 ret = rndis_filter_init_device(rndis_device);
808 * TODO: If rndis init failed, we will need to shut down the
813 /* Get the mac address */
814 ret = rndis_filter_query_device_mac(rndis_device);
817 * TODO: shutdown rndis device and the channel
821 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
823 rndis_filter_query_device_link_status(rndis_device);
825 device_info->link_state = rndis_device->link_state;
827 dev_info(&dev->device, "Device MAC %pM link state %s\n",
828 rndis_device->hw_mac_adr,
829 device_info->link_state ? "down" : "up");
834 void rndis_filter_device_remove(struct hv_device *dev)
836 struct netvsc_device *net_dev = hv_get_drvdata(dev);
837 struct rndis_device *rndis_dev = net_dev->extension;
839 /* Halt and release the rndis device */
840 rndis_filter_halt_device(rndis_dev);
843 net_dev->extension = NULL;
845 netvsc_device_remove(dev);
849 int rndis_filter_open(struct hv_device *dev)
851 struct netvsc_device *net_device = hv_get_drvdata(dev);
856 return rndis_filter_open_device(net_device->extension);
859 int rndis_filter_close(struct hv_device *dev)
861 struct netvsc_device *nvdev = hv_get_drvdata(dev);
866 return rndis_filter_close_device(nvdev->extension);
869 int rndis_filter_send(struct hv_device *dev,
870 struct hv_netvsc_packet *pkt)
873 struct rndis_filter_packet *filter_pkt;
874 struct rndis_message *rndis_msg;
875 struct rndis_packet *rndis_pkt;
877 bool isvlan = pkt->vlan_tci & VLAN_TAG_PRESENT;
879 /* Add the rndis header */
880 filter_pkt = (struct rndis_filter_packet *)pkt->extension;
882 rndis_msg = &filter_pkt->msg;
883 rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet);
885 rndis_msg_size += NDIS_VLAN_PPI_SIZE;
887 rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET;
888 rndis_msg->msg_len = pkt->total_data_buflen +
891 rndis_pkt = &rndis_msg->msg.pkt;
892 rndis_pkt->data_offset = sizeof(struct rndis_packet);
894 rndis_pkt->data_offset += NDIS_VLAN_PPI_SIZE;
895 rndis_pkt->data_len = pkt->total_data_buflen;
898 struct rndis_per_packet_info *ppi;
899 struct ndis_pkt_8021q_info *vlan;
901 rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet);
902 rndis_pkt->per_pkt_info_len = NDIS_VLAN_PPI_SIZE;
904 ppi = (struct rndis_per_packet_info *)((ulong)rndis_pkt +
905 rndis_pkt->per_pkt_info_offset);
906 ppi->size = NDIS_VLAN_PPI_SIZE;
907 ppi->type = IEEE_8021Q_INFO;
908 ppi->ppi_offset = sizeof(struct rndis_per_packet_info);
910 vlan = (struct ndis_pkt_8021q_info *)((ulong)ppi +
912 vlan->vlanid = pkt->vlan_tci & VLAN_VID_MASK;
913 vlan->pri = (pkt->vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
916 pkt->is_data_pkt = true;
917 pkt->page_buf[0].pfn = virt_to_phys(rndis_msg) >> PAGE_SHIFT;
918 pkt->page_buf[0].offset =
919 (unsigned long)rndis_msg & (PAGE_SIZE-1);
920 pkt->page_buf[0].len = rndis_msg_size;
922 /* Add one page_buf if the rndis msg goes beyond page boundary */
923 if (pkt->page_buf[0].offset + rndis_msg_size > PAGE_SIZE) {
925 for (i = pkt->page_buf_cnt; i > 1; i--)
926 pkt->page_buf[i] = pkt->page_buf[i-1];
928 pkt->page_buf[0].len = PAGE_SIZE - pkt->page_buf[0].offset;
929 pkt->page_buf[1].pfn = virt_to_phys((void *)((ulong)
930 rndis_msg + pkt->page_buf[0].len)) >> PAGE_SHIFT;
931 pkt->page_buf[1].offset = 0;
932 pkt->page_buf[1].len = rndis_msg_size - pkt->page_buf[0].len;
935 /* Save the packet send completion and context */
936 filter_pkt->completion = pkt->completion.send.send_completion;
937 filter_pkt->completion_ctx =
938 pkt->completion.send.send_completion_ctx;
941 pkt->completion.send.send_completion = rndis_filter_send_completion;
942 pkt->completion.send.send_completion_ctx = filter_pkt;
944 ret = netvsc_send(dev, pkt);
947 * Reset the completion to originals to allow retries from
950 pkt->completion.send.send_completion =
951 filter_pkt->completion;
952 pkt->completion.send.send_completion_ctx =
953 filter_pkt->completion_ctx;
959 static void rndis_filter_send_completion(void *ctx)
961 struct rndis_filter_packet *filter_pkt = ctx;
963 /* Pass it back to the original handler */
964 filter_pkt->completion(filter_pkt->completion_ctx);
968 static void rndis_filter_send_request_completion(void *ctx)