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 HV_HYP_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;
220 pb[0].offset = offset_in_hvpage(&req->request_msg);
222 /* Add one page_buf when request_msg crossing page boundary */
223 if (pb[0].offset + pb[0].len > HV_HYP_PAGE_SIZE) {
224 packet->page_buf_cnt++;
225 pb[0].len = HV_HYP_PAGE_SIZE -
227 pb[1].pfn = virt_to_phys((void *)&req->request_msg
228 + pb[0].len) >> HV_HYP_PAGE_SHIFT;
230 pb[1].len = req->request_msg.msg_len -
234 trace_rndis_send(dev->ndev, 0, &req->request_msg);
237 ret = netvsc_send(dev->ndev, packet, NULL, pb, NULL, false);
238 rcu_read_unlock_bh();
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 net_device *ndev,
260 struct netvsc_device *nvdev,
261 const struct rndis_message *resp)
263 struct rndis_device *dev = nvdev->extension;
264 struct rndis_request *request = NULL;
268 /* This should never happen, it means control message
269 * response received after device removed.
271 if (dev->state == RNDIS_DEV_UNINITIALIZED) {
273 "got rndis message uninitialized\n");
277 /* Ensure the packet is big enough to read req_id. Req_id is the 1st
278 * field in any request/response message, so the payload should have at
279 * least sizeof(u32) bytes
281 if (resp->msg_len - RNDIS_HEADER_SIZE < sizeof(u32)) {
282 netdev_err(ndev, "rndis msg_len too small: %u\n",
287 spin_lock_irqsave(&dev->request_lock, flags);
288 list_for_each_entry(request, &dev->req_list, list_ent) {
290 * All request/response message contains RequestId as the 1st
293 if (request->request_msg.msg.init_req.req_id
294 == resp->msg.init_complete.req_id) {
299 spin_unlock_irqrestore(&dev->request_lock, flags);
303 sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
304 memcpy(&request->response_msg, resp,
306 if (request->request_msg.ndis_msg_type ==
307 RNDIS_MSG_QUERY && request->request_msg.msg.
308 query_req.oid == RNDIS_OID_GEN_MEDIA_CONNECT_STATUS)
309 rndis_set_link_state(dev, request);
312 "rndis response buffer overflow "
313 "detected (size %u max %zu)\n",
315 sizeof(struct rndis_message));
317 if (resp->ndis_msg_type ==
319 /* does not have a request id field */
320 request->response_msg.msg.reset_complete.
321 status = RNDIS_STATUS_BUFFER_OVERFLOW;
323 request->response_msg.msg.
324 init_complete.status =
325 RNDIS_STATUS_BUFFER_OVERFLOW;
329 complete(&request->wait_event);
332 "no rndis request found for this response "
333 "(id 0x%x res type 0x%x)\n",
334 resp->msg.init_complete.req_id,
335 resp->ndis_msg_type);
340 * Get the Per-Packet-Info with the specified type
341 * return NULL if not found.
343 static inline void *rndis_get_ppi(struct net_device *ndev,
344 struct rndis_packet *rpkt,
345 u32 rpkt_len, u32 type, u8 internal)
347 struct rndis_per_packet_info *ppi;
350 if (rpkt->per_pkt_info_offset == 0)
353 /* Validate info_offset and info_len */
354 if (rpkt->per_pkt_info_offset < sizeof(struct rndis_packet) ||
355 rpkt->per_pkt_info_offset > rpkt_len) {
356 netdev_err(ndev, "Invalid per_pkt_info_offset: %u\n",
357 rpkt->per_pkt_info_offset);
361 if (rpkt->per_pkt_info_len > rpkt_len - rpkt->per_pkt_info_offset) {
362 netdev_err(ndev, "Invalid per_pkt_info_len: %u\n",
363 rpkt->per_pkt_info_len);
367 ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
368 rpkt->per_pkt_info_offset);
369 len = rpkt->per_pkt_info_len;
372 /* Validate ppi_offset and ppi_size */
373 if (ppi->size > len) {
374 netdev_err(ndev, "Invalid ppi size: %u\n", ppi->size);
378 if (ppi->ppi_offset >= ppi->size) {
379 netdev_err(ndev, "Invalid ppi_offset: %u\n", ppi->ppi_offset);
383 if (ppi->type == type && ppi->internal == internal)
384 return (void *)((ulong)ppi + ppi->ppi_offset);
386 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
393 void rsc_add_data(struct netvsc_channel *nvchan,
394 const struct ndis_pkt_8021q_info *vlan,
395 const struct ndis_tcp_ip_checksum_info *csum_info,
396 const u32 *hash_info,
399 u32 cnt = nvchan->rsc.cnt;
402 nvchan->rsc.pktlen += len;
404 nvchan->rsc.vlan = vlan;
405 nvchan->rsc.csum_info = csum_info;
406 nvchan->rsc.pktlen = len;
407 nvchan->rsc.hash_info = hash_info;
410 nvchan->rsc.data[cnt] = data;
411 nvchan->rsc.len[cnt] = len;
415 static int rndis_filter_receive_data(struct net_device *ndev,
416 struct netvsc_device *nvdev,
417 struct netvsc_channel *nvchan,
418 struct rndis_message *msg,
421 struct rndis_packet *rndis_pkt = &msg->msg.pkt;
422 const struct ndis_tcp_ip_checksum_info *csum_info;
423 const struct ndis_pkt_8021q_info *vlan;
424 const struct rndis_pktinfo_id *pktinfo_id;
425 const u32 *hash_info;
426 u32 data_offset, rpkt_len;
428 bool rsc_more = false;
431 /* Ensure data_buflen is big enough to read header fields */
432 if (data_buflen < RNDIS_HEADER_SIZE + sizeof(struct rndis_packet)) {
433 netdev_err(ndev, "invalid rndis pkt, data_buflen too small: %u\n",
435 return NVSP_STAT_FAIL;
438 /* Validate rndis_pkt offset */
439 if (rndis_pkt->data_offset >= data_buflen - RNDIS_HEADER_SIZE) {
440 netdev_err(ndev, "invalid rndis packet offset: %u\n",
441 rndis_pkt->data_offset);
442 return NVSP_STAT_FAIL;
445 /* Remove the rndis header and pass it back up the stack */
446 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
448 rpkt_len = data_buflen - RNDIS_HEADER_SIZE;
449 data_buflen -= data_offset;
452 * Make sure we got a valid RNDIS message, now total_data_buflen
453 * should be the data packet size plus the trailer padding size
455 if (unlikely(data_buflen < rndis_pkt->data_len)) {
456 netdev_err(ndev, "rndis message buffer "
457 "overflow detected (got %u, min %u)"
458 "...dropping this message!\n",
459 data_buflen, rndis_pkt->data_len);
460 return NVSP_STAT_FAIL;
463 vlan = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, IEEE_8021Q_INFO, 0);
465 csum_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, TCPIP_CHKSUM_PKTINFO, 0);
467 hash_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, NBL_HASH_VALUE, 0);
469 pktinfo_id = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, RNDIS_PKTINFO_ID, 1);
471 data = (void *)msg + data_offset;
473 /* Identify RSC frags, drop erroneous packets */
474 if (pktinfo_id && (pktinfo_id->flag & RNDIS_PKTINFO_SUBALLOC)) {
475 if (pktinfo_id->flag & RNDIS_PKTINFO_1ST_FRAG)
477 else if (nvchan->rsc.cnt == 0)
482 if (pktinfo_id->flag & RNDIS_PKTINFO_LAST_FRAG)
485 if (rsc_more && nvchan->rsc.is_last)
491 if (unlikely(nvchan->rsc.cnt >= NVSP_RSC_MAX))
494 /* Put data into per channel structure.
495 * Also, remove the rndis trailer padding from rndis packet message
496 * rndis_pkt->data_len tell us the real data length, we only copy
497 * the data packet to the stack, without the rndis trailer padding
499 rsc_add_data(nvchan, vlan, csum_info, hash_info,
500 data, rndis_pkt->data_len);
503 return NVSP_STAT_SUCCESS;
505 ret = netvsc_recv_callback(ndev, nvdev, nvchan);
511 return NVSP_STAT_FAIL;
514 int rndis_filter_receive(struct net_device *ndev,
515 struct netvsc_device *net_dev,
516 struct netvsc_channel *nvchan,
517 void *data, u32 buflen)
519 struct net_device_context *net_device_ctx = netdev_priv(ndev);
520 struct rndis_message *rndis_msg = data;
522 if (netif_msg_rx_status(net_device_ctx))
523 dump_rndis_message(ndev, rndis_msg);
525 /* Validate incoming rndis_message packet */
526 if (buflen < RNDIS_HEADER_SIZE || rndis_msg->msg_len < RNDIS_HEADER_SIZE ||
527 buflen < rndis_msg->msg_len) {
528 netdev_err(ndev, "Invalid rndis_msg (buflen: %u, msg_len: %u)\n",
529 buflen, rndis_msg->msg_len);
530 return NVSP_STAT_FAIL;
533 switch (rndis_msg->ndis_msg_type) {
534 case RNDIS_MSG_PACKET:
535 return rndis_filter_receive_data(ndev, net_dev, nvchan,
537 case RNDIS_MSG_INIT_C:
538 case RNDIS_MSG_QUERY_C:
539 case RNDIS_MSG_SET_C:
540 /* completion msgs */
541 rndis_filter_receive_response(ndev, net_dev, rndis_msg);
544 case RNDIS_MSG_INDICATE:
545 /* notification msgs */
546 netvsc_linkstatus_callback(ndev, rndis_msg);
550 "unhandled rndis message (type %u len %u)\n",
551 rndis_msg->ndis_msg_type,
553 return NVSP_STAT_FAIL;
556 return NVSP_STAT_SUCCESS;
559 static int rndis_filter_query_device(struct rndis_device *dev,
560 struct netvsc_device *nvdev,
561 u32 oid, void *result, u32 *result_size)
563 struct rndis_request *request;
564 u32 inresult_size = *result_size;
565 struct rndis_query_request *query;
566 struct rndis_query_complete *query_complete;
573 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
574 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
580 /* Setup the rndis query */
581 query = &request->request_msg.msg.query_req;
583 query->info_buf_offset = sizeof(struct rndis_query_request);
584 query->info_buflen = 0;
585 query->dev_vc_handle = 0;
587 if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) {
588 struct ndis_offload *hwcaps;
589 u32 nvsp_version = nvdev->nvsp_version;
593 if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) {
594 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
595 size = NDIS_OFFLOAD_SIZE;
596 } else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) {
597 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2;
598 size = NDIS_OFFLOAD_SIZE_6_1;
600 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1;
601 size = NDIS_OFFLOAD_SIZE_6_0;
604 request->request_msg.msg_len += size;
605 query->info_buflen = size;
606 hwcaps = (struct ndis_offload *)
607 ((unsigned long)query + query->info_buf_offset);
609 hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD;
610 hwcaps->header.revision = ndis_rev;
611 hwcaps->header.size = size;
613 } else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
614 struct ndis_recv_scale_cap *cap;
616 request->request_msg.msg_len +=
617 sizeof(struct ndis_recv_scale_cap);
618 query->info_buflen = sizeof(struct ndis_recv_scale_cap);
619 cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
620 query->info_buf_offset);
621 cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
622 cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
623 cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
626 ret = rndis_filter_send_request(dev, request);
630 wait_for_completion(&request->wait_event);
632 /* Copy the response back */
633 query_complete = &request->response_msg.msg.query_complete;
635 if (query_complete->info_buflen > inresult_size) {
641 (void *)((unsigned long)query_complete +
642 query_complete->info_buf_offset),
643 query_complete->info_buflen);
645 *result_size = query_complete->info_buflen;
649 put_rndis_request(dev, request);
654 /* Get the hardware offload capabilities */
656 rndis_query_hwcaps(struct rndis_device *dev, struct netvsc_device *net_device,
657 struct ndis_offload *caps)
659 u32 caps_len = sizeof(*caps);
662 memset(caps, 0, sizeof(*caps));
664 ret = rndis_filter_query_device(dev, net_device,
665 OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
670 if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) {
671 netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n",
676 if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) {
677 netdev_warn(dev->ndev, "invalid NDIS objrev %x\n",
678 caps->header.revision);
682 if (caps->header.size > caps_len ||
683 caps->header.size < NDIS_OFFLOAD_SIZE_6_0) {
684 netdev_warn(dev->ndev,
685 "invalid NDIS objsize %u, data size %u\n",
686 caps->header.size, caps_len);
693 static int rndis_filter_query_device_mac(struct rndis_device *dev,
694 struct netvsc_device *net_device)
698 return rndis_filter_query_device(dev, net_device,
699 RNDIS_OID_802_3_PERMANENT_ADDRESS,
700 dev->hw_mac_adr, &size);
703 #define NWADR_STR "NetworkAddress"
704 #define NWADR_STRLEN 14
706 int rndis_filter_set_device_mac(struct netvsc_device *nvdev,
709 struct rndis_device *rdev = nvdev->extension;
710 struct rndis_request *request;
711 struct rndis_set_request *set;
712 struct rndis_config_parameter_info *cpi;
713 wchar_t *cfg_nwadr, *cfg_mac;
714 struct rndis_set_complete *set_complete;
715 char macstr[2*ETH_ALEN+1];
716 u32 extlen = sizeof(struct rndis_config_parameter_info) +
717 2*NWADR_STRLEN + 4*ETH_ALEN;
720 request = get_rndis_request(rdev, RNDIS_MSG_SET,
721 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
725 set = &request->request_msg.msg.set_req;
726 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
727 set->info_buflen = extlen;
728 set->info_buf_offset = sizeof(struct rndis_set_request);
729 set->dev_vc_handle = 0;
731 cpi = (struct rndis_config_parameter_info *)((ulong)set +
732 set->info_buf_offset);
733 cpi->parameter_name_offset =
734 sizeof(struct rndis_config_parameter_info);
735 /* Multiply by 2 because host needs 2 bytes (utf16) for each char */
736 cpi->parameter_name_length = 2*NWADR_STRLEN;
737 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
738 cpi->parameter_value_offset =
739 cpi->parameter_name_offset + cpi->parameter_name_length;
740 /* Multiply by 4 because each MAC byte displayed as 2 utf16 chars */
741 cpi->parameter_value_length = 4*ETH_ALEN;
743 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
744 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
745 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
746 cfg_nwadr, NWADR_STRLEN);
749 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
750 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
751 cfg_mac, 2*ETH_ALEN);
755 ret = rndis_filter_send_request(rdev, request);
759 wait_for_completion(&request->wait_event);
761 set_complete = &request->response_msg.msg.set_complete;
762 if (set_complete->status != RNDIS_STATUS_SUCCESS)
766 put_rndis_request(rdev, request);
771 rndis_filter_set_offload_params(struct net_device *ndev,
772 struct netvsc_device *nvdev,
773 struct ndis_offload_params *req_offloads)
775 struct rndis_device *rdev = nvdev->extension;
776 struct rndis_request *request;
777 struct rndis_set_request *set;
778 struct ndis_offload_params *offload_params;
779 struct rndis_set_complete *set_complete;
780 u32 extlen = sizeof(struct ndis_offload_params);
782 u32 vsp_version = nvdev->nvsp_version;
784 if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
785 extlen = VERSION_4_OFFLOAD_SIZE;
786 /* On NVSP_PROTOCOL_VERSION_4 and below, we do not support
787 * UDP checksum offload.
789 req_offloads->udp_ip_v4_csum = 0;
790 req_offloads->udp_ip_v6_csum = 0;
793 request = get_rndis_request(rdev, RNDIS_MSG_SET,
794 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
798 set = &request->request_msg.msg.set_req;
799 set->oid = OID_TCP_OFFLOAD_PARAMETERS;
800 set->info_buflen = extlen;
801 set->info_buf_offset = sizeof(struct rndis_set_request);
802 set->dev_vc_handle = 0;
804 offload_params = (struct ndis_offload_params *)((ulong)set +
805 set->info_buf_offset);
806 *offload_params = *req_offloads;
807 offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
808 offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
809 offload_params->header.size = extlen;
811 ret = rndis_filter_send_request(rdev, request);
815 wait_for_completion(&request->wait_event);
816 set_complete = &request->response_msg.msg.set_complete;
817 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
818 netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
819 set_complete->status);
824 put_rndis_request(rdev, request);
828 static int rndis_set_rss_param_msg(struct rndis_device *rdev,
829 const u8 *rss_key, u16 flag)
831 struct net_device *ndev = rdev->ndev;
832 struct net_device_context *ndc = netdev_priv(ndev);
833 struct rndis_request *request;
834 struct rndis_set_request *set;
835 struct rndis_set_complete *set_complete;
836 u32 extlen = sizeof(struct ndis_recv_scale_param) +
837 4 * ITAB_NUM + NETVSC_HASH_KEYLEN;
838 struct ndis_recv_scale_param *rssp;
843 request = get_rndis_request(
845 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
849 set = &request->request_msg.msg.set_req;
850 set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
851 set->info_buflen = extlen;
852 set->info_buf_offset = sizeof(struct rndis_set_request);
853 set->dev_vc_handle = 0;
855 rssp = (struct ndis_recv_scale_param *)(set + 1);
856 rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
857 rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
858 rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
860 rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
861 NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
863 rssp->indirect_tabsize = 4*ITAB_NUM;
864 rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
865 rssp->hashkey_size = NETVSC_HASH_KEYLEN;
866 rssp->hashkey_offset = rssp->indirect_taboffset +
867 rssp->indirect_tabsize;
869 /* Set indirection table entries */
870 itab = (u32 *)(rssp + 1);
871 for (i = 0; i < ITAB_NUM; i++)
872 itab[i] = ndc->rx_table[i];
874 /* Set hask key values */
875 keyp = (u8 *)((unsigned long)rssp + rssp->hashkey_offset);
876 memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
878 ret = rndis_filter_send_request(rdev, request);
882 wait_for_completion(&request->wait_event);
883 set_complete = &request->response_msg.msg.set_complete;
884 if (set_complete->status == RNDIS_STATUS_SUCCESS) {
885 if (!(flag & NDIS_RSS_PARAM_FLAG_DISABLE_RSS) &&
886 !(flag & NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED))
887 memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
890 netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
891 set_complete->status);
896 put_rndis_request(rdev, request);
900 int rndis_filter_set_rss_param(struct rndis_device *rdev,
903 /* Disable RSS before change */
904 rndis_set_rss_param_msg(rdev, rss_key,
905 NDIS_RSS_PARAM_FLAG_DISABLE_RSS);
907 return rndis_set_rss_param_msg(rdev, rss_key, 0);
910 static int rndis_filter_query_device_link_status(struct rndis_device *dev,
911 struct netvsc_device *net_device)
913 u32 size = sizeof(u32);
916 return rndis_filter_query_device(dev, net_device,
917 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
918 &link_status, &size);
921 static int rndis_filter_query_link_speed(struct rndis_device *dev,
922 struct netvsc_device *net_device)
924 u32 size = sizeof(u32);
926 struct net_device_context *ndc;
929 ret = rndis_filter_query_device(dev, net_device,
930 RNDIS_OID_GEN_LINK_SPEED,
934 ndc = netdev_priv(dev->ndev);
936 /* The link speed reported from host is in 100bps unit, so
937 * we convert it to Mbps here.
939 ndc->speed = link_speed / 10000;
945 static int rndis_filter_set_packet_filter(struct rndis_device *dev,
948 struct rndis_request *request;
949 struct rndis_set_request *set;
952 if (dev->filter == new_filter)
955 request = get_rndis_request(dev, RNDIS_MSG_SET,
956 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
961 /* Setup the rndis set */
962 set = &request->request_msg.msg.set_req;
963 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
964 set->info_buflen = sizeof(u32);
965 set->info_buf_offset = sizeof(struct rndis_set_request);
967 memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
968 &new_filter, sizeof(u32));
970 ret = rndis_filter_send_request(dev, request);
972 wait_for_completion(&request->wait_event);
973 dev->filter = new_filter;
976 put_rndis_request(dev, request);
981 static void rndis_set_multicast(struct work_struct *w)
983 struct rndis_device *rdev
984 = container_of(w, struct rndis_device, mcast_work);
985 u32 filter = NDIS_PACKET_TYPE_DIRECTED;
986 unsigned int flags = rdev->ndev->flags;
988 if (flags & IFF_PROMISC) {
989 filter = NDIS_PACKET_TYPE_PROMISCUOUS;
991 if (!netdev_mc_empty(rdev->ndev) || (flags & IFF_ALLMULTI))
992 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
993 if (flags & IFF_BROADCAST)
994 filter |= NDIS_PACKET_TYPE_BROADCAST;
997 rndis_filter_set_packet_filter(rdev, filter);
1000 void rndis_filter_update(struct netvsc_device *nvdev)
1002 struct rndis_device *rdev = nvdev->extension;
1004 schedule_work(&rdev->mcast_work);
1007 static int rndis_filter_init_device(struct rndis_device *dev,
1008 struct netvsc_device *nvdev)
1010 struct rndis_request *request;
1011 struct rndis_initialize_request *init;
1012 struct rndis_initialize_complete *init_complete;
1016 request = get_rndis_request(dev, RNDIS_MSG_INIT,
1017 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
1023 /* Setup the rndis set */
1024 init = &request->request_msg.msg.init_req;
1025 init->major_ver = RNDIS_MAJOR_VERSION;
1026 init->minor_ver = RNDIS_MINOR_VERSION;
1027 init->max_xfer_size = 0x4000;
1029 dev->state = RNDIS_DEV_INITIALIZING;
1031 ret = rndis_filter_send_request(dev, request);
1033 dev->state = RNDIS_DEV_UNINITIALIZED;
1037 wait_for_completion(&request->wait_event);
1039 init_complete = &request->response_msg.msg.init_complete;
1040 status = init_complete->status;
1041 if (status == RNDIS_STATUS_SUCCESS) {
1042 dev->state = RNDIS_DEV_INITIALIZED;
1043 nvdev->max_pkt = init_complete->max_pkt_per_msg;
1044 nvdev->pkt_align = 1 << init_complete->pkt_alignment_factor;
1047 dev->state = RNDIS_DEV_UNINITIALIZED;
1053 put_rndis_request(dev, request);
1058 static bool netvsc_device_idle(const struct netvsc_device *nvdev)
1062 for (i = 0; i < nvdev->num_chn; i++) {
1063 const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
1065 if (nvchan->mrc.first != nvchan->mrc.next)
1068 if (atomic_read(&nvchan->queue_sends) > 0)
1075 static void rndis_filter_halt_device(struct netvsc_device *nvdev,
1076 struct rndis_device *dev)
1078 struct rndis_request *request;
1079 struct rndis_halt_request *halt;
1081 /* Attempt to do a rndis device halt */
1082 request = get_rndis_request(dev, RNDIS_MSG_HALT,
1083 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
1087 /* Setup the rndis set */
1088 halt = &request->request_msg.msg.halt_req;
1089 halt->req_id = atomic_inc_return(&dev->new_req_id);
1091 /* Ignore return since this msg is optional. */
1092 rndis_filter_send_request(dev, request);
1094 dev->state = RNDIS_DEV_UNINITIALIZED;
1097 nvdev->destroy = true;
1099 /* Force flag to be ordered before waiting */
1102 /* Wait for all send completions */
1103 wait_event(nvdev->wait_drain, netvsc_device_idle(nvdev));
1106 put_rndis_request(dev, request);
1109 static int rndis_filter_open_device(struct rndis_device *dev)
1113 if (dev->state != RNDIS_DEV_INITIALIZED)
1116 ret = rndis_filter_set_packet_filter(dev,
1117 NDIS_PACKET_TYPE_BROADCAST |
1118 NDIS_PACKET_TYPE_ALL_MULTICAST |
1119 NDIS_PACKET_TYPE_DIRECTED);
1121 dev->state = RNDIS_DEV_DATAINITIALIZED;
1126 static int rndis_filter_close_device(struct rndis_device *dev)
1130 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
1133 /* Make sure rndis_set_multicast doesn't re-enable filter! */
1134 cancel_work_sync(&dev->mcast_work);
1136 ret = rndis_filter_set_packet_filter(dev, 0);
1141 dev->state = RNDIS_DEV_INITIALIZED;
1146 static void netvsc_sc_open(struct vmbus_channel *new_sc)
1148 struct net_device *ndev =
1149 hv_get_drvdata(new_sc->primary_channel->device_obj);
1150 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1151 struct netvsc_device *nvscdev;
1152 u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
1153 struct netvsc_channel *nvchan;
1156 /* This is safe because this callback only happens when
1157 * new device is being setup and waiting on the channel_init_wait.
1159 nvscdev = rcu_dereference_raw(ndev_ctx->nvdev);
1160 if (!nvscdev || chn_index >= nvscdev->num_chn)
1163 nvchan = nvscdev->chan_table + chn_index;
1165 /* Because the device uses NAPI, all the interrupt batching and
1166 * control is done via Net softirq, not the channel handling
1168 set_channel_read_mode(new_sc, HV_CALL_ISR);
1170 /* Set the channel before opening.*/
1171 nvchan->channel = new_sc;
1173 new_sc->rqstor_size = netvsc_rqstor_size(netvsc_ring_bytes);
1174 ret = vmbus_open(new_sc, netvsc_ring_bytes,
1175 netvsc_ring_bytes, NULL, 0,
1176 netvsc_channel_cb, nvchan);
1178 napi_enable(&nvchan->napi);
1180 netdev_notice(ndev, "sub channel open failed: %d\n", ret);
1182 if (atomic_inc_return(&nvscdev->open_chn) == nvscdev->num_chn)
1183 wake_up(&nvscdev->subchan_open);
1186 /* Open sub-channels after completing the handling of the device probe.
1187 * This breaks overlap of processing the host message for the
1188 * new primary channel with the initialization of sub-channels.
1190 int rndis_set_subchannel(struct net_device *ndev,
1191 struct netvsc_device *nvdev,
1192 struct netvsc_device_info *dev_info)
1194 struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
1195 struct net_device_context *ndev_ctx = netdev_priv(ndev);
1196 struct hv_device *hv_dev = ndev_ctx->device_ctx;
1197 struct rndis_device *rdev = nvdev->extension;
1202 memset(init_packet, 0, sizeof(struct nvsp_message));
1203 init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
1204 init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
1205 init_packet->msg.v5_msg.subchn_req.num_subchannels =
1207 trace_nvsp_send(ndev, init_packet);
1209 ret = vmbus_sendpacket(hv_dev->channel, init_packet,
1210 sizeof(struct nvsp_message),
1211 (unsigned long)init_packet,
1213 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
1215 netdev_err(ndev, "sub channel allocate send failed: %d\n", ret);
1219 wait_for_completion(&nvdev->channel_init_wait);
1220 if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
1221 netdev_err(ndev, "sub channel request failed\n");
1225 nvdev->num_chn = 1 +
1226 init_packet->msg.v5_msg.subchn_comp.num_subchannels;
1228 /* wait for all sub channels to open */
1229 wait_event(nvdev->subchan_open,
1230 atomic_read(&nvdev->open_chn) == nvdev->num_chn);
1232 for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
1233 ndev_ctx->tx_table[i] = i % nvdev->num_chn;
1235 /* ignore failures from setting rss parameters, still have channels */
1237 rndis_filter_set_rss_param(rdev, dev_info->rss_key);
1239 rndis_filter_set_rss_param(rdev, netvsc_hash_key);
1241 netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
1242 netif_set_real_num_rx_queues(ndev, nvdev->num_chn);
1247 static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
1248 struct netvsc_device *nvdev)
1250 struct net_device *net = rndis_device->ndev;
1251 struct net_device_context *net_device_ctx = netdev_priv(net);
1252 struct ndis_offload hwcaps;
1253 struct ndis_offload_params offloads;
1254 unsigned int gso_max_size = GSO_MAX_SIZE;
1257 /* Find HW offload capabilities */
1258 ret = rndis_query_hwcaps(rndis_device, nvdev, &hwcaps);
1262 /* A value of zero means "no change"; now turn on what we want. */
1263 memset(&offloads, 0, sizeof(struct ndis_offload_params));
1265 /* Linux does not care about IP checksum, always does in kernel */
1266 offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED;
1268 /* Reset previously set hw_features flags */
1269 net->hw_features &= ~NETVSC_SUPPORTED_HW_FEATURES;
1270 net_device_ctx->tx_checksum_mask = 0;
1272 /* Compute tx offload settings based on hw capabilities */
1273 net->hw_features |= NETIF_F_RXCSUM;
1274 net->hw_features |= NETIF_F_SG;
1275 net->hw_features |= NETIF_F_RXHASH;
1277 if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
1278 /* Can checksum TCP */
1279 net->hw_features |= NETIF_F_IP_CSUM;
1280 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP;
1282 offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1284 if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) {
1285 offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1286 net->hw_features |= NETIF_F_TSO;
1288 if (hwcaps.lsov2.ip4_maxsz < gso_max_size)
1289 gso_max_size = hwcaps.lsov2.ip4_maxsz;
1292 if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) {
1293 offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1294 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP;
1298 if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) {
1299 net->hw_features |= NETIF_F_IPV6_CSUM;
1301 offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1302 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP;
1304 if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) &&
1305 (hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) {
1306 offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1307 net->hw_features |= NETIF_F_TSO6;
1309 if (hwcaps.lsov2.ip6_maxsz < gso_max_size)
1310 gso_max_size = hwcaps.lsov2.ip6_maxsz;
1313 if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) {
1314 offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1315 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP;
1319 if (hwcaps.rsc.ip4 && hwcaps.rsc.ip6) {
1320 net->hw_features |= NETIF_F_LRO;
1322 if (net->features & NETIF_F_LRO) {
1323 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1324 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
1326 offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1327 offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
1331 /* In case some hw_features disappeared we need to remove them from
1332 * net->features list as they're no longer supported.
1334 net->features &= ~NETVSC_SUPPORTED_HW_FEATURES | net->hw_features;
1336 netif_set_gso_max_size(net, gso_max_size);
1338 ret = rndis_filter_set_offload_params(net, nvdev, &offloads);
1343 static void rndis_get_friendly_name(struct net_device *net,
1344 struct rndis_device *rndis_device,
1345 struct netvsc_device *net_device)
1347 ucs2_char_t wname[256];
1352 size = sizeof(wname);
1353 if (rndis_filter_query_device(rndis_device, net_device,
1354 RNDIS_OID_GEN_FRIENDLY_NAME,
1356 return; /* ignore if host does not support */
1359 return; /* name not set */
1361 /* Convert Windows Unicode string to UTF-8 */
1362 len = ucs2_as_utf8(ifalias, wname, sizeof(ifalias));
1364 /* ignore the default value from host */
1365 if (strcmp(ifalias, "Network Adapter") != 0)
1366 dev_set_alias(net, ifalias, len);
1369 struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
1370 struct netvsc_device_info *device_info)
1372 struct net_device *net = hv_get_drvdata(dev);
1373 struct net_device_context *ndc = netdev_priv(net);
1374 struct netvsc_device *net_device;
1375 struct rndis_device *rndis_device;
1376 struct ndis_recv_scale_cap rsscap;
1377 u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
1379 u32 num_possible_rss_qs;
1382 rndis_device = get_rndis_device();
1384 return ERR_PTR(-ENODEV);
1386 /* Let the inner driver handle this first to create the netvsc channel
1387 * NOTE! Once the channel is created, we may get a receive callback
1388 * (RndisFilterOnReceive()) before this call is completed
1390 net_device = netvsc_device_add(dev, device_info);
1391 if (IS_ERR(net_device)) {
1392 kfree(rndis_device);
1396 /* Initialize the rndis device */
1397 net_device->max_chn = 1;
1398 net_device->num_chn = 1;
1400 net_device->extension = rndis_device;
1401 rndis_device->ndev = net;
1403 /* Send the rndis initialization message */
1404 ret = rndis_filter_init_device(rndis_device, net_device);
1408 /* Get the MTU from the host */
1410 ret = rndis_filter_query_device(rndis_device, net_device,
1411 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
1413 if (ret == 0 && size == sizeof(u32) && mtu < net->mtu)
1416 /* Get the mac address */
1417 ret = rndis_filter_query_device_mac(rndis_device, net_device);
1421 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
1423 /* Get friendly name as ifalias*/
1425 rndis_get_friendly_name(net, rndis_device, net_device);
1427 /* Query and set hardware capabilities */
1428 ret = rndis_netdev_set_hwcaps(rndis_device, net_device);
1432 rndis_filter_query_device_link_status(rndis_device, net_device);
1434 netdev_dbg(net, "Device MAC %pM link state %s\n",
1435 rndis_device->hw_mac_adr,
1436 rndis_device->link_state ? "down" : "up");
1438 if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
1441 rndis_filter_query_link_speed(rndis_device, net_device);
1444 memset(&rsscap, 0, rsscap_size);
1445 ret = rndis_filter_query_device(rndis_device, net_device,
1446 OID_GEN_RECEIVE_SCALE_CAPABILITIES,
1447 &rsscap, &rsscap_size);
1448 if (ret || rsscap.num_recv_que < 2)
1451 /* This guarantees that num_possible_rss_qs <= num_online_cpus */
1452 num_possible_rss_qs = min_t(u32, num_online_cpus(),
1453 rsscap.num_recv_que);
1455 net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, num_possible_rss_qs);
1457 /* We will use the given number of channels if available. */
1458 net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
1460 if (!netif_is_rxfh_configured(net)) {
1461 for (i = 0; i < ITAB_NUM; i++)
1462 ndc->rx_table[i] = ethtool_rxfh_indir_default(
1463 i, net_device->num_chn);
1466 atomic_set(&net_device->open_chn, 1);
1467 vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
1469 for (i = 1; i < net_device->num_chn; i++) {
1470 ret = netvsc_alloc_recv_comp_ring(net_device, i);
1473 vfree(net_device->chan_table[i].mrc.slots);
1478 for (i = 1; i < net_device->num_chn; i++)
1479 netif_napi_add(net, &net_device->chan_table[i].napi,
1480 netvsc_poll, NAPI_POLL_WEIGHT);
1485 /* setting up multiple channels failed */
1486 net_device->max_chn = 1;
1487 net_device->num_chn = 1;
1491 rndis_filter_device_remove(dev, net_device);
1492 return ERR_PTR(ret);
1495 void rndis_filter_device_remove(struct hv_device *dev,
1496 struct netvsc_device *net_dev)
1498 struct rndis_device *rndis_dev = net_dev->extension;
1500 /* Halt and release the rndis device */
1501 rndis_filter_halt_device(net_dev, rndis_dev);
1503 netvsc_device_remove(dev);
1506 int rndis_filter_open(struct netvsc_device *nvdev)
1511 return rndis_filter_open_device(nvdev->extension);
1514 int rndis_filter_close(struct netvsc_device *nvdev)
1519 return rndis_filter_close_device(nvdev->extension);