1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2009, Microsoft Corporation.
6 * Haiyang Zhang <haiyangz@microsoft.com>
7 * Hank Janssen <hjanssen@microsoft.com>
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>
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>
23 #include "hyperv_net.h"
24 #include "netvsc_trace.h"
26 static void rndis_set_multicast(struct work_struct *w);
28 #define RNDIS_EXT_LEN PAGE_SIZE
29 struct rndis_request {
30 struct list_head list_ent;
31 struct completion wait_event;
33 struct rndis_message response_msg;
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
40 u8 response_ext[RNDIS_EXT_LEN];
42 /* Simplify allocation by having a netvsc packet inline */
43 struct hv_netvsc_packet pkt;
45 struct rndis_message request_msg;
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.
50 u8 request_ext[RNDIS_EXT_LEN];
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
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);
72 INIT_WORK(&device->mcast_work, rndis_set_multicast);
74 device->state = RNDIS_DEV_UNINITIALIZED;
79 static struct rndis_request *get_rndis_request(struct rndis_device *dev,
83 struct rndis_request *request;
84 struct rndis_message *rndis_msg;
85 struct rndis_set_request *set;
88 request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
92 init_completion(&request->wait_event);
94 rndis_msg = &request->request_msg;
95 rndis_msg->ndis_msg_type = msg_type;
96 rndis_msg->msg_len = msg_len;
98 request->pkt.q_idx = 0;
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
105 set = &rndis_msg->msg.set_req;
106 set->req_id = atomic_inc_return(&dev->new_req_id);
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);
116 static void put_rndis_request(struct rndis_device *dev,
117 struct rndis_request *req)
121 spin_lock_irqsave(&dev->request_lock, flags);
122 list_del(&req->list_ent);
123 spin_unlock_irqrestore(&dev->request_lock, flags);
128 static void dump_rndis_message(struct net_device *netdev,
129 const struct rndis_message *rndis_msg)
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, "
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);
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, "
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.
161 rndis_msg->msg.init_complete.
162 pkt_alignment_factor);
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, "
170 rndis_msg->msg.query_complete.req_id,
171 rndis_msg->msg.query_complete.status,
172 rndis_msg->msg.query_complete.
174 rndis_msg->msg.query_complete.
178 case RNDIS_MSG_SET_C:
180 "RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
182 rndis_msg->msg.set_complete.req_id,
183 rndis_msg->msg.set_complete.status);
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",
190 rndis_msg->msg.indicate_status.status,
191 rndis_msg->msg.indicate_status.status_buflen,
192 rndis_msg->msg.indicate_status.status_buf_offset);
196 netdev_dbg(netdev, "0x%x (len %u)\n",
197 rndis_msg->ndis_msg_type,
203 static int rndis_filter_send_request(struct rndis_device *dev,
204 struct rndis_request *req)
206 struct hv_netvsc_packet *packet;
207 struct hv_page_buffer page_buf[2];
208 struct hv_page_buffer *pb = page_buf;
211 /* Setup the packet to send it */
214 packet->total_data_buflen = req->request_msg.msg_len;
215 packet->page_buf_cnt = 1;
217 pb[0].pfn = virt_to_phys(&req->request_msg) >>
219 pb[0].len = req->request_msg.msg_len;
221 (unsigned long)&req->request_msg & (PAGE_SIZE - 1);
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 -
228 pb[1].pfn = virt_to_phys((void *)&req->request_msg
229 + pb[0].len) >> PAGE_SHIFT;
231 pb[1].len = req->request_msg.msg_len -
235 trace_rndis_send(dev->ndev, 0, &req->request_msg);
238 ret = netvsc_send(dev->ndev, packet, NULL, pb, NULL, false);
239 rcu_read_unlock_bh();
244 static void rndis_set_link_state(struct rndis_device *rdev,
245 struct rndis_request *request)
248 struct rndis_query_complete *query_complete;
250 query_complete = &request->response_msg.msg.query_complete;
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;
260 static void rndis_filter_receive_response(struct net_device *ndev,
261 struct netvsc_device *nvdev,
262 const struct rndis_message *resp)
264 struct rndis_device *dev = nvdev->extension;
265 struct rndis_request *request = NULL;
269 /* This should never happen, it means control message
270 * response received after device removed.
272 if (dev->state == RNDIS_DEV_UNINITIALIZED) {
274 "got rndis message uninitialized\n");
278 /* Ensure the packet is big enough to read req_id. Req_id is the 1st
279 * field in any request/response message, so the payload should have at
280 * least sizeof(u32) bytes
282 if (resp->msg_len - RNDIS_HEADER_SIZE < sizeof(u32)) {
283 netdev_err(ndev, "rndis msg_len too small: %u\n",
288 spin_lock_irqsave(&dev->request_lock, flags);
289 list_for_each_entry(request, &dev->req_list, list_ent) {
291 * All request/response message contains RequestId as the 1st
294 if (request->request_msg.msg.init_req.req_id
295 == resp->msg.init_complete.req_id) {
300 spin_unlock_irqrestore(&dev->request_lock, flags);
304 sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
305 memcpy(&request->response_msg, resp,
307 if (request->request_msg.ndis_msg_type ==
308 RNDIS_MSG_QUERY && request->request_msg.msg.
309 query_req.oid == RNDIS_OID_GEN_MEDIA_CONNECT_STATUS)
310 rndis_set_link_state(dev, request);
313 "rndis response buffer overflow "
314 "detected (size %u max %zu)\n",
316 sizeof(struct rndis_message));
318 if (resp->ndis_msg_type ==
320 /* does not have a request id field */
321 request->response_msg.msg.reset_complete.
322 status = RNDIS_STATUS_BUFFER_OVERFLOW;
324 request->response_msg.msg.
325 init_complete.status =
326 RNDIS_STATUS_BUFFER_OVERFLOW;
330 complete(&request->wait_event);
333 "no rndis request found for this response "
334 "(id 0x%x res type 0x%x)\n",
335 resp->msg.init_complete.req_id,
336 resp->ndis_msg_type);
341 * Get the Per-Packet-Info with the specified type
342 * return NULL if not found.
344 static inline void *rndis_get_ppi(struct net_device *ndev,
345 struct rndis_packet *rpkt,
346 u32 rpkt_len, u32 type, u8 internal)
348 struct rndis_per_packet_info *ppi;
351 if (rpkt->per_pkt_info_offset == 0)
354 /* Validate info_offset and info_len */
355 if (rpkt->per_pkt_info_offset < sizeof(struct rndis_packet) ||
356 rpkt->per_pkt_info_offset > rpkt_len) {
357 netdev_err(ndev, "Invalid per_pkt_info_offset: %u\n",
358 rpkt->per_pkt_info_offset);
362 if (rpkt->per_pkt_info_len > rpkt_len - rpkt->per_pkt_info_offset) {
363 netdev_err(ndev, "Invalid per_pkt_info_len: %u\n",
364 rpkt->per_pkt_info_len);
368 ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
369 rpkt->per_pkt_info_offset);
370 len = rpkt->per_pkt_info_len;
373 /* Validate ppi_offset and ppi_size */
374 if (ppi->size > len) {
375 netdev_err(ndev, "Invalid ppi size: %u\n", ppi->size);
379 if (ppi->ppi_offset >= ppi->size) {
380 netdev_err(ndev, "Invalid ppi_offset: %u\n", ppi->ppi_offset);
384 if (ppi->type == type && ppi->internal == internal)
385 return (void *)((ulong)ppi + ppi->ppi_offset);
387 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
394 void rsc_add_data(struct netvsc_channel *nvchan,
395 const struct ndis_pkt_8021q_info *vlan,
396 const struct ndis_tcp_ip_checksum_info *csum_info,
397 const u32 *hash_info,
400 u32 cnt = nvchan->rsc.cnt;
403 nvchan->rsc.pktlen += len;
405 nvchan->rsc.vlan = vlan;
406 nvchan->rsc.csum_info = csum_info;
407 nvchan->rsc.pktlen = len;
408 nvchan->rsc.hash_info = hash_info;
411 nvchan->rsc.data[cnt] = data;
412 nvchan->rsc.len[cnt] = len;
416 static int rndis_filter_receive_data(struct net_device *ndev,
417 struct netvsc_device *nvdev,
418 struct netvsc_channel *nvchan,
419 struct rndis_message *msg,
422 struct rndis_packet *rndis_pkt = &msg->msg.pkt;
423 const struct ndis_tcp_ip_checksum_info *csum_info;
424 const struct ndis_pkt_8021q_info *vlan;
425 const struct rndis_pktinfo_id *pktinfo_id;
426 const u32 *hash_info;
427 u32 data_offset, rpkt_len;
429 bool rsc_more = false;
432 /* Ensure data_buflen is big enough to read header fields */
433 if (data_buflen < RNDIS_HEADER_SIZE + sizeof(struct rndis_packet)) {
434 netdev_err(ndev, "invalid rndis pkt, data_buflen too small: %u\n",
436 return NVSP_STAT_FAIL;
439 /* Validate rndis_pkt offset */
440 if (rndis_pkt->data_offset >= data_buflen - RNDIS_HEADER_SIZE) {
441 netdev_err(ndev, "invalid rndis packet offset: %u\n",
442 rndis_pkt->data_offset);
443 return NVSP_STAT_FAIL;
446 /* Remove the rndis header and pass it back up the stack */
447 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
449 rpkt_len = data_buflen - RNDIS_HEADER_SIZE;
450 data_buflen -= data_offset;
453 * Make sure we got a valid RNDIS message, now total_data_buflen
454 * should be the data packet size plus the trailer padding size
456 if (unlikely(data_buflen < rndis_pkt->data_len)) {
457 netdev_err(ndev, "rndis message buffer "
458 "overflow detected (got %u, min %u)"
459 "...dropping this message!\n",
460 data_buflen, rndis_pkt->data_len);
461 return NVSP_STAT_FAIL;
464 vlan = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, IEEE_8021Q_INFO, 0);
466 csum_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, TCPIP_CHKSUM_PKTINFO, 0);
468 hash_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, NBL_HASH_VALUE, 0);
470 pktinfo_id = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, RNDIS_PKTINFO_ID, 1);
472 data = (void *)msg + data_offset;
474 /* Identify RSC frags, drop erroneous packets */
475 if (pktinfo_id && (pktinfo_id->flag & RNDIS_PKTINFO_SUBALLOC)) {
476 if (pktinfo_id->flag & RNDIS_PKTINFO_1ST_FRAG)
478 else if (nvchan->rsc.cnt == 0)
483 if (pktinfo_id->flag & RNDIS_PKTINFO_LAST_FRAG)
486 if (rsc_more && nvchan->rsc.is_last)
492 if (unlikely(nvchan->rsc.cnt >= NVSP_RSC_MAX))
495 /* Put data into per channel structure.
496 * Also, remove the rndis trailer padding from rndis packet message
497 * rndis_pkt->data_len tell us the real data length, we only copy
498 * the data packet to the stack, without the rndis trailer padding
500 rsc_add_data(nvchan, vlan, csum_info, hash_info,
501 data, rndis_pkt->data_len);
504 return NVSP_STAT_SUCCESS;
506 ret = netvsc_recv_callback(ndev, nvdev, nvchan);
512 /* Drop incomplete packet */
514 return NVSP_STAT_FAIL;
517 int rndis_filter_receive(struct net_device *ndev,
518 struct netvsc_device *net_dev,
519 struct netvsc_channel *nvchan,
520 void *data, u32 buflen)
522 struct net_device_context *net_device_ctx = netdev_priv(ndev);
523 struct rndis_message *rndis_msg = data;
525 if (netif_msg_rx_status(net_device_ctx))
526 dump_rndis_message(ndev, rndis_msg);
528 /* Validate incoming rndis_message packet */
529 if (buflen < RNDIS_HEADER_SIZE || rndis_msg->msg_len < RNDIS_HEADER_SIZE ||
530 buflen < rndis_msg->msg_len) {
531 netdev_err(ndev, "Invalid rndis_msg (buflen: %u, msg_len: %u)\n",
532 buflen, rndis_msg->msg_len);
533 return NVSP_STAT_FAIL;
536 switch (rndis_msg->ndis_msg_type) {
537 case RNDIS_MSG_PACKET:
538 return rndis_filter_receive_data(ndev, net_dev, nvchan,
540 case RNDIS_MSG_INIT_C:
541 case RNDIS_MSG_QUERY_C:
542 case RNDIS_MSG_SET_C:
543 /* completion msgs */
544 rndis_filter_receive_response(ndev, net_dev, rndis_msg);
547 case RNDIS_MSG_INDICATE:
548 /* notification msgs */
549 netvsc_linkstatus_callback(ndev, rndis_msg);
553 "unhandled rndis message (type %u len %u)\n",
554 rndis_msg->ndis_msg_type,
556 return NVSP_STAT_FAIL;
559 return NVSP_STAT_SUCCESS;
562 static int rndis_filter_query_device(struct rndis_device *dev,
563 struct netvsc_device *nvdev,
564 u32 oid, void *result, u32 *result_size)
566 struct rndis_request *request;
567 u32 inresult_size = *result_size;
568 struct rndis_query_request *query;
569 struct rndis_query_complete *query_complete;
576 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
577 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
583 /* Setup the rndis query */
584 query = &request->request_msg.msg.query_req;
586 query->info_buf_offset = sizeof(struct rndis_query_request);
587 query->info_buflen = 0;
588 query->dev_vc_handle = 0;
590 if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) {
591 struct ndis_offload *hwcaps;
592 u32 nvsp_version = nvdev->nvsp_version;
596 if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) {
597 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
598 size = NDIS_OFFLOAD_SIZE;
599 } else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) {
600 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2;
601 size = NDIS_OFFLOAD_SIZE_6_1;
603 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1;
604 size = NDIS_OFFLOAD_SIZE_6_0;
607 request->request_msg.msg_len += size;
608 query->info_buflen = size;
609 hwcaps = (struct ndis_offload *)
610 ((unsigned long)query + query->info_buf_offset);
612 hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD;
613 hwcaps->header.revision = ndis_rev;
614 hwcaps->header.size = size;
616 } else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
617 struct ndis_recv_scale_cap *cap;
619 request->request_msg.msg_len +=
620 sizeof(struct ndis_recv_scale_cap);
621 query->info_buflen = sizeof(struct ndis_recv_scale_cap);
622 cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
623 query->info_buf_offset);
624 cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
625 cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
626 cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
629 ret = rndis_filter_send_request(dev, request);
633 wait_for_completion(&request->wait_event);
635 /* Copy the response back */
636 query_complete = &request->response_msg.msg.query_complete;
638 if (query_complete->info_buflen > inresult_size) {
644 (void *)((unsigned long)query_complete +
645 query_complete->info_buf_offset),
646 query_complete->info_buflen);
648 *result_size = query_complete->info_buflen;
652 put_rndis_request(dev, request);
657 /* Get the hardware offload capabilities */
659 rndis_query_hwcaps(struct rndis_device *dev, struct netvsc_device *net_device,
660 struct ndis_offload *caps)
662 u32 caps_len = sizeof(*caps);
665 memset(caps, 0, sizeof(*caps));
667 ret = rndis_filter_query_device(dev, net_device,
668 OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
673 if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) {
674 netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n",
679 if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) {
680 netdev_warn(dev->ndev, "invalid NDIS objrev %x\n",
681 caps->header.revision);
685 if (caps->header.size > caps_len ||
686 caps->header.size < NDIS_OFFLOAD_SIZE_6_0) {
687 netdev_warn(dev->ndev,
688 "invalid NDIS objsize %u, data size %u\n",
689 caps->header.size, caps_len);
696 static int rndis_filter_query_device_mac(struct rndis_device *dev,
697 struct netvsc_device *net_device)
701 return rndis_filter_query_device(dev, net_device,
702 RNDIS_OID_802_3_PERMANENT_ADDRESS,
703 dev->hw_mac_adr, &size);
706 #define NWADR_STR "NetworkAddress"
707 #define NWADR_STRLEN 14
709 int rndis_filter_set_device_mac(struct netvsc_device *nvdev,
712 struct rndis_device *rdev = nvdev->extension;
713 struct rndis_request *request;
714 struct rndis_set_request *set;
715 struct rndis_config_parameter_info *cpi;
716 wchar_t *cfg_nwadr, *cfg_mac;
717 struct rndis_set_complete *set_complete;
718 char macstr[2*ETH_ALEN+1];
719 u32 extlen = sizeof(struct rndis_config_parameter_info) +
720 2*NWADR_STRLEN + 4*ETH_ALEN;
723 request = get_rndis_request(rdev, RNDIS_MSG_SET,
724 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
728 set = &request->request_msg.msg.set_req;
729 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
730 set->info_buflen = extlen;
731 set->info_buf_offset = sizeof(struct rndis_set_request);
732 set->dev_vc_handle = 0;
734 cpi = (struct rndis_config_parameter_info *)((ulong)set +
735 set->info_buf_offset);
736 cpi->parameter_name_offset =
737 sizeof(struct rndis_config_parameter_info);
738 /* Multiply by 2 because host needs 2 bytes (utf16) for each char */
739 cpi->parameter_name_length = 2*NWADR_STRLEN;
740 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
741 cpi->parameter_value_offset =
742 cpi->parameter_name_offset + cpi->parameter_name_length;
743 /* Multiply by 4 because each MAC byte displayed as 2 utf16 chars */
744 cpi->parameter_value_length = 4*ETH_ALEN;
746 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
747 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
748 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
749 cfg_nwadr, NWADR_STRLEN);
752 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
753 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
754 cfg_mac, 2*ETH_ALEN);
758 ret = rndis_filter_send_request(rdev, request);
762 wait_for_completion(&request->wait_event);
764 set_complete = &request->response_msg.msg.set_complete;
765 if (set_complete->status != RNDIS_STATUS_SUCCESS)
769 put_rndis_request(rdev, request);
774 rndis_filter_set_offload_params(struct net_device *ndev,
775 struct netvsc_device *nvdev,
776 struct ndis_offload_params *req_offloads)
778 struct rndis_device *rdev = nvdev->extension;
779 struct rndis_request *request;
780 struct rndis_set_request *set;
781 struct ndis_offload_params *offload_params;
782 struct rndis_set_complete *set_complete;
783 u32 extlen = sizeof(struct ndis_offload_params);
785 u32 vsp_version = nvdev->nvsp_version;
787 if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
788 extlen = VERSION_4_OFFLOAD_SIZE;
789 /* On NVSP_PROTOCOL_VERSION_4 and below, we do not support
790 * UDP checksum offload.
792 req_offloads->udp_ip_v4_csum = 0;
793 req_offloads->udp_ip_v6_csum = 0;
796 request = get_rndis_request(rdev, RNDIS_MSG_SET,
797 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
801 set = &request->request_msg.msg.set_req;
802 set->oid = OID_TCP_OFFLOAD_PARAMETERS;
803 set->info_buflen = extlen;
804 set->info_buf_offset = sizeof(struct rndis_set_request);
805 set->dev_vc_handle = 0;
807 offload_params = (struct ndis_offload_params *)((ulong)set +
808 set->info_buf_offset);
809 *offload_params = *req_offloads;
810 offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
811 offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
812 offload_params->header.size = extlen;
814 ret = rndis_filter_send_request(rdev, request);
818 wait_for_completion(&request->wait_event);
819 set_complete = &request->response_msg.msg.set_complete;
820 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
821 netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
822 set_complete->status);
827 put_rndis_request(rdev, request);
831 static int rndis_set_rss_param_msg(struct rndis_device *rdev,
832 const u8 *rss_key, u16 flag)
834 struct net_device *ndev = rdev->ndev;
835 struct net_device_context *ndc = netdev_priv(ndev);
836 struct rndis_request *request;
837 struct rndis_set_request *set;
838 struct rndis_set_complete *set_complete;
839 u32 extlen = sizeof(struct ndis_recv_scale_param) +
840 4 * ITAB_NUM + NETVSC_HASH_KEYLEN;
841 struct ndis_recv_scale_param *rssp;
846 request = get_rndis_request(
848 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
852 set = &request->request_msg.msg.set_req;
853 set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
854 set->info_buflen = extlen;
855 set->info_buf_offset = sizeof(struct rndis_set_request);
856 set->dev_vc_handle = 0;
858 rssp = (struct ndis_recv_scale_param *)(set + 1);
859 rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
860 rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
861 rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
863 rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
864 NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
866 rssp->indirect_tabsize = 4*ITAB_NUM;
867 rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
868 rssp->hashkey_size = NETVSC_HASH_KEYLEN;
869 rssp->hashkey_offset = rssp->indirect_taboffset +
870 rssp->indirect_tabsize;
872 /* Set indirection table entries */
873 itab = (u32 *)(rssp + 1);
874 for (i = 0; i < ITAB_NUM; i++)
875 itab[i] = ndc->rx_table[i];
877 /* Set hask key values */
878 keyp = (u8 *)((unsigned long)rssp + rssp->hashkey_offset);
879 memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
881 ret = rndis_filter_send_request(rdev, request);
885 wait_for_completion(&request->wait_event);
886 set_complete = &request->response_msg.msg.set_complete;
887 if (set_complete->status == RNDIS_STATUS_SUCCESS) {
888 if (!(flag & NDIS_RSS_PARAM_FLAG_DISABLE_RSS) &&
889 !(flag & NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED))
890 memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
893 netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
894 set_complete->status);
899 put_rndis_request(rdev, request);
903 int rndis_filter_set_rss_param(struct rndis_device *rdev,
906 /* Disable RSS before change */
907 rndis_set_rss_param_msg(rdev, rss_key,
908 NDIS_RSS_PARAM_FLAG_DISABLE_RSS);
910 return rndis_set_rss_param_msg(rdev, rss_key, 0);
913 static int rndis_filter_query_device_link_status(struct rndis_device *dev,
914 struct netvsc_device *net_device)
916 u32 size = sizeof(u32);
919 return rndis_filter_query_device(dev, net_device,
920 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
921 &link_status, &size);
924 static int rndis_filter_query_link_speed(struct rndis_device *dev,
925 struct netvsc_device *net_device)
927 u32 size = sizeof(u32);
929 struct net_device_context *ndc;
932 ret = rndis_filter_query_device(dev, net_device,
933 RNDIS_OID_GEN_LINK_SPEED,
937 ndc = netdev_priv(dev->ndev);
939 /* The link speed reported from host is in 100bps unit, so
940 * we convert it to Mbps here.
942 ndc->speed = link_speed / 10000;
948 static int rndis_filter_set_packet_filter(struct rndis_device *dev,
951 struct rndis_request *request;
952 struct rndis_set_request *set;
955 if (dev->filter == new_filter)
958 request = get_rndis_request(dev, RNDIS_MSG_SET,
959 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
964 /* Setup the rndis set */
965 set = &request->request_msg.msg.set_req;
966 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
967 set->info_buflen = sizeof(u32);
968 set->info_buf_offset = sizeof(struct rndis_set_request);
970 memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
971 &new_filter, sizeof(u32));
973 ret = rndis_filter_send_request(dev, request);
975 wait_for_completion(&request->wait_event);
976 dev->filter = new_filter;
979 put_rndis_request(dev, request);
984 static void rndis_set_multicast(struct work_struct *w)
986 struct rndis_device *rdev
987 = container_of(w, struct rndis_device, mcast_work);
988 u32 filter = NDIS_PACKET_TYPE_DIRECTED;
989 unsigned int flags = rdev->ndev->flags;
991 if (flags & IFF_PROMISC) {
992 filter = NDIS_PACKET_TYPE_PROMISCUOUS;
994 if (!netdev_mc_empty(rdev->ndev) || (flags & IFF_ALLMULTI))
995 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
996 if (flags & IFF_BROADCAST)
997 filter |= NDIS_PACKET_TYPE_BROADCAST;
1000 rndis_filter_set_packet_filter(rdev, filter);
1003 void rndis_filter_update(struct netvsc_device *nvdev)
1005 struct rndis_device *rdev = nvdev->extension;
1007 schedule_work(&rdev->mcast_work);
1010 static int rndis_filter_init_device(struct rndis_device *dev,
1011 struct netvsc_device *nvdev)
1013 struct rndis_request *request;
1014 struct rndis_initialize_request *init;
1015 struct rndis_initialize_complete *init_complete;
1019 request = get_rndis_request(dev, RNDIS_MSG_INIT,
1020 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
1026 /* Setup the rndis set */
1027 init = &request->request_msg.msg.init_req;
1028 init->major_ver = RNDIS_MAJOR_VERSION;
1029 init->minor_ver = RNDIS_MINOR_VERSION;
1030 init->max_xfer_size = 0x4000;
1032 dev->state = RNDIS_DEV_INITIALIZING;
1034 ret = rndis_filter_send_request(dev, request);
1036 dev->state = RNDIS_DEV_UNINITIALIZED;
1040 wait_for_completion(&request->wait_event);
1042 init_complete = &request->response_msg.msg.init_complete;
1043 status = init_complete->status;
1044 if (status == RNDIS_STATUS_SUCCESS) {
1045 dev->state = RNDIS_DEV_INITIALIZED;
1046 nvdev->max_pkt = init_complete->max_pkt_per_msg;
1047 nvdev->pkt_align = 1 << init_complete->pkt_alignment_factor;
1050 dev->state = RNDIS_DEV_UNINITIALIZED;
1056 put_rndis_request(dev, request);
1061 static bool netvsc_device_idle(const struct netvsc_device *nvdev)
1065 for (i = 0; i < nvdev->num_chn; i++) {
1066 const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
1068 if (nvchan->mrc.first != nvchan->mrc.next)
1071 if (atomic_read(&nvchan->queue_sends) > 0)
1078 static void rndis_filter_halt_device(struct netvsc_device *nvdev,
1079 struct rndis_device *dev)
1081 struct rndis_request *request;
1082 struct rndis_halt_request *halt;
1084 /* Attempt to do a rndis device halt */
1085 request = get_rndis_request(dev, RNDIS_MSG_HALT,
1086 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
1090 /* Setup the rndis set */
1091 halt = &request->request_msg.msg.halt_req;
1092 halt->req_id = atomic_inc_return(&dev->new_req_id);
1094 /* Ignore return since this msg is optional. */
1095 rndis_filter_send_request(dev, request);
1097 dev->state = RNDIS_DEV_UNINITIALIZED;
1100 nvdev->destroy = true;
1102 /* Force flag to be ordered before waiting */
1105 /* Wait for all send completions */
1106 wait_event(nvdev->wait_drain, netvsc_device_idle(nvdev));
1109 put_rndis_request(dev, request);
1112 static int rndis_filter_open_device(struct rndis_device *dev)
1116 if (dev->state != RNDIS_DEV_INITIALIZED)
1119 ret = rndis_filter_set_packet_filter(dev,
1120 NDIS_PACKET_TYPE_BROADCAST |
1121 NDIS_PACKET_TYPE_ALL_MULTICAST |
1122 NDIS_PACKET_TYPE_DIRECTED);
1124 dev->state = RNDIS_DEV_DATAINITIALIZED;
1129 static int rndis_filter_close_device(struct rndis_device *dev)
1133 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
1136 /* Make sure rndis_set_multicast doesn't re-enable filter! */
1137 cancel_work_sync(&dev->mcast_work);
1139 ret = rndis_filter_set_packet_filter(dev, 0);
1144 dev->state = RNDIS_DEV_INITIALIZED;
1149 static void netvsc_sc_open(struct vmbus_channel *new_sc)
1151 struct net_device *ndev =
1152 hv_get_drvdata(new_sc->primary_channel->device_obj);
1153 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1154 struct netvsc_device *nvscdev;
1155 u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
1156 struct netvsc_channel *nvchan;
1159 /* This is safe because this callback only happens when
1160 * new device is being setup and waiting on the channel_init_wait.
1162 nvscdev = rcu_dereference_raw(ndev_ctx->nvdev);
1163 if (!nvscdev || chn_index >= nvscdev->num_chn)
1166 nvchan = nvscdev->chan_table + chn_index;
1168 /* Because the device uses NAPI, all the interrupt batching and
1169 * control is done via Net softirq, not the channel handling
1171 set_channel_read_mode(new_sc, HV_CALL_ISR);
1173 /* Set the channel before opening.*/
1174 nvchan->channel = new_sc;
1176 ret = vmbus_open(new_sc, netvsc_ring_bytes,
1177 netvsc_ring_bytes, NULL, 0,
1178 netvsc_channel_cb, nvchan);
1180 napi_enable(&nvchan->napi);
1182 netdev_notice(ndev, "sub channel open failed: %d\n", ret);
1184 if (atomic_inc_return(&nvscdev->open_chn) == nvscdev->num_chn)
1185 wake_up(&nvscdev->subchan_open);
1188 /* Open sub-channels after completing the handling of the device probe.
1189 * This breaks overlap of processing the host message for the
1190 * new primary channel with the initialization of sub-channels.
1192 int rndis_set_subchannel(struct net_device *ndev,
1193 struct netvsc_device *nvdev,
1194 struct netvsc_device_info *dev_info)
1196 struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
1197 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1198 struct hv_device *hv_dev = ndev_ctx->device_ctx;
1199 struct rndis_device *rdev = nvdev->extension;
1204 memset(init_packet, 0, sizeof(struct nvsp_message));
1205 init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
1206 init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
1207 init_packet->msg.v5_msg.subchn_req.num_subchannels =
1209 trace_nvsp_send(ndev, init_packet);
1211 ret = vmbus_sendpacket(hv_dev->channel, init_packet,
1212 sizeof(struct nvsp_message),
1213 (unsigned long)init_packet,
1215 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
1217 netdev_err(ndev, "sub channel allocate send failed: %d\n", ret);
1221 wait_for_completion(&nvdev->channel_init_wait);
1222 if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
1223 netdev_err(ndev, "sub channel request failed\n");
1227 nvdev->num_chn = 1 +
1228 init_packet->msg.v5_msg.subchn_comp.num_subchannels;
1230 /* wait for all sub channels to open */
1231 wait_event(nvdev->subchan_open,
1232 atomic_read(&nvdev->open_chn) == nvdev->num_chn);
1234 for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
1235 ndev_ctx->tx_table[i] = i % nvdev->num_chn;
1237 /* ignore failures from setting rss parameters, still have channels */
1239 rndis_filter_set_rss_param(rdev, dev_info->rss_key);
1241 rndis_filter_set_rss_param(rdev, netvsc_hash_key);
1243 netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
1244 netif_set_real_num_rx_queues(ndev, nvdev->num_chn);
1249 static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
1250 struct netvsc_device *nvdev)
1252 struct net_device *net = rndis_device->ndev;
1253 struct net_device_context *net_device_ctx = netdev_priv(net);
1254 struct ndis_offload hwcaps;
1255 struct ndis_offload_params offloads;
1256 unsigned int gso_max_size = GSO_MAX_SIZE;
1259 /* Find HW offload capabilities */
1260 ret = rndis_query_hwcaps(rndis_device, nvdev, &hwcaps);
1264 /* A value of zero means "no change"; now turn on what we want. */
1265 memset(&offloads, 0, sizeof(struct ndis_offload_params));
1267 /* Linux does not care about IP checksum, always does in kernel */
1268 offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED;
1270 /* Reset previously set hw_features flags */
1271 net->hw_features &= ~NETVSC_SUPPORTED_HW_FEATURES;
1272 net_device_ctx->tx_checksum_mask = 0;
1274 /* Compute tx offload settings based on hw capabilities */
1275 net->hw_features |= NETIF_F_RXCSUM;
1276 net->hw_features |= NETIF_F_SG;
1277 net->hw_features |= NETIF_F_RXHASH;
1279 if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
1280 /* Can checksum TCP */
1281 net->hw_features |= NETIF_F_IP_CSUM;
1282 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP;
1284 offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1286 if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) {
1287 offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1288 net->hw_features |= NETIF_F_TSO;
1290 if (hwcaps.lsov2.ip4_maxsz < gso_max_size)
1291 gso_max_size = hwcaps.lsov2.ip4_maxsz;
1294 if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) {
1295 offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1296 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP;
1300 if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) {
1301 net->hw_features |= NETIF_F_IPV6_CSUM;
1303 offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1304 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP;
1306 if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) &&
1307 (hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) {
1308 offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1309 net->hw_features |= NETIF_F_TSO6;
1311 if (hwcaps.lsov2.ip6_maxsz < gso_max_size)
1312 gso_max_size = hwcaps.lsov2.ip6_maxsz;
1315 if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) {
1316 offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1317 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP;
1321 if (hwcaps.rsc.ip4 && hwcaps.rsc.ip6) {
1322 net->hw_features |= NETIF_F_LRO;
1324 if (net->features & NETIF_F_LRO) {
1325 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1326 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1328 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1329 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1333 /* In case some hw_features disappeared we need to remove them from
1334 * net->features list as they're no longer supported.
1336 net->features &= ~NETVSC_SUPPORTED_HW_FEATURES | net->hw_features;
1338 netif_set_gso_max_size(net, gso_max_size);
1340 ret = rndis_filter_set_offload_params(net, nvdev, &offloads);
1345 static void rndis_get_friendly_name(struct net_device *net,
1346 struct rndis_device *rndis_device,
1347 struct netvsc_device *net_device)
1349 ucs2_char_t wname[256];
1354 size = sizeof(wname);
1355 if (rndis_filter_query_device(rndis_device, net_device,
1356 RNDIS_OID_GEN_FRIENDLY_NAME,
1358 return; /* ignore if host does not support */
1361 return; /* name not set */
1363 /* Convert Windows Unicode string to UTF-8 */
1364 len = ucs2_as_utf8(ifalias, wname, sizeof(ifalias));
1366 /* ignore the default value from host */
1367 if (strcmp(ifalias, "Network Adapter") != 0)
1368 dev_set_alias(net, ifalias, len);
1371 struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
1372 struct netvsc_device_info *device_info)
1374 struct net_device *net = hv_get_drvdata(dev);
1375 struct net_device_context *ndc = netdev_priv(net);
1376 struct netvsc_device *net_device;
1377 struct rndis_device *rndis_device;
1378 struct ndis_recv_scale_cap rsscap;
1379 u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
1381 u32 num_possible_rss_qs;
1384 rndis_device = get_rndis_device();
1386 return ERR_PTR(-ENODEV);
1388 /* Let the inner driver handle this first to create the netvsc channel
1389 * NOTE! Once the channel is created, we may get a receive callback
1390 * (RndisFilterOnReceive()) before this call is completed
1392 net_device = netvsc_device_add(dev, device_info);
1393 if (IS_ERR(net_device)) {
1394 kfree(rndis_device);
1398 /* Initialize the rndis device */
1399 net_device->max_chn = 1;
1400 net_device->num_chn = 1;
1402 net_device->extension = rndis_device;
1403 rndis_device->ndev = net;
1405 /* Send the rndis initialization message */
1406 ret = rndis_filter_init_device(rndis_device, net_device);
1410 /* Get the MTU from the host */
1412 ret = rndis_filter_query_device(rndis_device, net_device,
1413 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
1415 if (ret == 0 && size == sizeof(u32) && mtu < net->mtu)
1418 /* Get the mac address */
1419 ret = rndis_filter_query_device_mac(rndis_device, net_device);
1423 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
1425 /* Get friendly name as ifalias*/
1427 rndis_get_friendly_name(net, rndis_device, net_device);
1429 /* Query and set hardware capabilities */
1430 ret = rndis_netdev_set_hwcaps(rndis_device, net_device);
1434 rndis_filter_query_device_link_status(rndis_device, net_device);
1436 netdev_dbg(net, "Device MAC %pM link state %s\n",
1437 rndis_device->hw_mac_adr,
1438 rndis_device->link_state ? "down" : "up");
1440 if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
1443 rndis_filter_query_link_speed(rndis_device, net_device);
1446 memset(&rsscap, 0, rsscap_size);
1447 ret = rndis_filter_query_device(rndis_device, net_device,
1448 OID_GEN_RECEIVE_SCALE_CAPABILITIES,
1449 &rsscap, &rsscap_size);
1450 if (ret || rsscap.num_recv_que < 2)
1453 /* This guarantees that num_possible_rss_qs <= num_online_cpus */
1454 num_possible_rss_qs = min_t(u32, num_online_cpus(),
1455 rsscap.num_recv_que);
1457 net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, num_possible_rss_qs);
1459 /* We will use the given number of channels if available. */
1460 net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
1462 if (!netif_is_rxfh_configured(net)) {
1463 for (i = 0; i < ITAB_NUM; i++)
1464 ndc->rx_table[i] = ethtool_rxfh_indir_default(
1465 i, net_device->num_chn);
1468 atomic_set(&net_device->open_chn, 1);
1469 vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
1471 for (i = 1; i < net_device->num_chn; i++) {
1472 ret = netvsc_alloc_recv_comp_ring(net_device, i);
1475 vfree(net_device->chan_table[i].mrc.slots);
1480 for (i = 1; i < net_device->num_chn; i++)
1481 netif_napi_add(net, &net_device->chan_table[i].napi,
1482 netvsc_poll, NAPI_POLL_WEIGHT);
1487 /* setting up multiple channels failed */
1488 net_device->max_chn = 1;
1489 net_device->num_chn = 1;
1493 rndis_filter_device_remove(dev, net_device);
1494 return ERR_PTR(ret);
1497 void rndis_filter_device_remove(struct hv_device *dev,
1498 struct netvsc_device *net_dev)
1500 struct rndis_device *rndis_dev = net_dev->extension;
1502 /* Halt and release the rndis device */
1503 rndis_filter_halt_device(net_dev, rndis_dev);
1505 netvsc_device_remove(dev);
1508 int rndis_filter_open(struct netvsc_device *nvdev)
1513 return rndis_filter_open_device(nvdev->extension);
1516 int rndis_filter_close(struct netvsc_device *nvdev)
1521 return rndis_filter_close_device(nvdev->extension);