2 * Copyright (c) 2009, Microsoft Corporation.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, see <http://www.gnu.org/licenses/>.
17 * Haiyang Zhang <haiyangz@microsoft.com>
18 * Hank Janssen <hjanssen@microsoft.com>
20 #include <linux/kernel.h>
21 #include <linux/sched.h>
22 #include <linux/wait.h>
23 #include <linux/highmem.h>
24 #include <linux/slab.h>
26 #include <linux/if_ether.h>
27 #include <linux/netdevice.h>
28 #include <linux/if_vlan.h>
29 #include <linux/nls.h>
30 #include <linux/vmalloc.h>
32 #include "hyperv_net.h"
34 static void rndis_set_multicast(struct work_struct *w);
36 #define RNDIS_EXT_LEN PAGE_SIZE
37 struct rndis_request {
38 struct list_head list_ent;
39 struct completion wait_event;
41 struct rndis_message response_msg;
43 * The buffer for extended info after the RNDIS response message. It's
44 * referenced based on the data offset in the RNDIS message. Its size
45 * is enough for current needs, and should be sufficient for the near
48 u8 response_ext[RNDIS_EXT_LEN];
50 /* Simplify allocation by having a netvsc packet inline */
51 struct hv_netvsc_packet pkt;
53 struct rndis_message request_msg;
55 * The buffer for the extended info after the RNDIS request message.
56 * It is referenced and sized in a similar way as response_ext.
58 u8 request_ext[RNDIS_EXT_LEN];
61 static const u8 netvsc_hash_key[NETVSC_HASH_KEYLEN] = {
62 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
63 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
64 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
65 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
66 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa
69 static struct rndis_device *get_rndis_device(void)
71 struct rndis_device *device;
73 device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
77 spin_lock_init(&device->request_lock);
79 INIT_LIST_HEAD(&device->req_list);
80 INIT_WORK(&device->mcast_work, rndis_set_multicast);
82 device->state = RNDIS_DEV_UNINITIALIZED;
87 static struct rndis_request *get_rndis_request(struct rndis_device *dev,
91 struct rndis_request *request;
92 struct rndis_message *rndis_msg;
93 struct rndis_set_request *set;
96 request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
100 init_completion(&request->wait_event);
102 rndis_msg = &request->request_msg;
103 rndis_msg->ndis_msg_type = msg_type;
104 rndis_msg->msg_len = msg_len;
106 request->pkt.q_idx = 0;
109 * Set the request id. This field is always after the rndis header for
110 * request/response packet types so we just used the SetRequest as a
113 set = &rndis_msg->msg.set_req;
114 set->req_id = atomic_inc_return(&dev->new_req_id);
116 /* Add to the request list */
117 spin_lock_irqsave(&dev->request_lock, flags);
118 list_add_tail(&request->list_ent, &dev->req_list);
119 spin_unlock_irqrestore(&dev->request_lock, flags);
124 static void put_rndis_request(struct rndis_device *dev,
125 struct rndis_request *req)
129 spin_lock_irqsave(&dev->request_lock, flags);
130 list_del(&req->list_ent);
131 spin_unlock_irqrestore(&dev->request_lock, flags);
136 static void dump_rndis_message(struct hv_device *hv_dev,
137 const struct rndis_message *rndis_msg)
139 struct net_device *netdev = hv_get_drvdata(hv_dev);
141 switch (rndis_msg->ndis_msg_type) {
142 case RNDIS_MSG_PACKET:
143 netdev_dbg(netdev, "RNDIS_MSG_PACKET (len %u, "
144 "data offset %u data len %u, # oob %u, "
145 "oob offset %u, oob len %u, pkt offset %u, "
148 rndis_msg->msg.pkt.data_offset,
149 rndis_msg->msg.pkt.data_len,
150 rndis_msg->msg.pkt.num_oob_data_elements,
151 rndis_msg->msg.pkt.oob_data_offset,
152 rndis_msg->msg.pkt.oob_data_len,
153 rndis_msg->msg.pkt.per_pkt_info_offset,
154 rndis_msg->msg.pkt.per_pkt_info_len);
157 case RNDIS_MSG_INIT_C:
158 netdev_dbg(netdev, "RNDIS_MSG_INIT_C "
159 "(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
160 "device flags %d, max xfer size 0x%x, max pkts %u, "
163 rndis_msg->msg.init_complete.req_id,
164 rndis_msg->msg.init_complete.status,
165 rndis_msg->msg.init_complete.major_ver,
166 rndis_msg->msg.init_complete.minor_ver,
167 rndis_msg->msg.init_complete.dev_flags,
168 rndis_msg->msg.init_complete.max_xfer_size,
169 rndis_msg->msg.init_complete.
171 rndis_msg->msg.init_complete.
172 pkt_alignment_factor);
175 case RNDIS_MSG_QUERY_C:
176 netdev_dbg(netdev, "RNDIS_MSG_QUERY_C "
177 "(len %u, id 0x%x, status 0x%x, buf len %u, "
180 rndis_msg->msg.query_complete.req_id,
181 rndis_msg->msg.query_complete.status,
182 rndis_msg->msg.query_complete.
184 rndis_msg->msg.query_complete.
188 case RNDIS_MSG_SET_C:
190 "RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
192 rndis_msg->msg.set_complete.req_id,
193 rndis_msg->msg.set_complete.status);
196 case RNDIS_MSG_INDICATE:
197 netdev_dbg(netdev, "RNDIS_MSG_INDICATE "
198 "(len %u, status 0x%x, buf len %u, buf offset %u)\n",
200 rndis_msg->msg.indicate_status.status,
201 rndis_msg->msg.indicate_status.status_buflen,
202 rndis_msg->msg.indicate_status.status_buf_offset);
206 netdev_dbg(netdev, "0x%x (len %u)\n",
207 rndis_msg->ndis_msg_type,
213 static int rndis_filter_send_request(struct rndis_device *dev,
214 struct rndis_request *req)
217 struct hv_netvsc_packet *packet;
218 struct hv_page_buffer page_buf[2];
219 struct hv_page_buffer *pb = page_buf;
220 struct net_device_context *net_device_ctx = netdev_priv(dev->ndev);
222 /* Setup the packet to send it */
225 packet->total_data_buflen = req->request_msg.msg_len;
226 packet->page_buf_cnt = 1;
228 pb[0].pfn = virt_to_phys(&req->request_msg) >>
230 pb[0].len = req->request_msg.msg_len;
232 (unsigned long)&req->request_msg & (PAGE_SIZE - 1);
234 /* Add one page_buf when request_msg crossing page boundary */
235 if (pb[0].offset + pb[0].len > PAGE_SIZE) {
236 packet->page_buf_cnt++;
237 pb[0].len = PAGE_SIZE -
239 pb[1].pfn = virt_to_phys((void *)&req->request_msg
240 + pb[0].len) >> PAGE_SHIFT;
242 pb[1].len = req->request_msg.msg_len -
246 ret = netvsc_send(net_device_ctx->device_ctx, packet, NULL, &pb, NULL);
250 static void rndis_set_link_state(struct rndis_device *rdev,
251 struct rndis_request *request)
254 struct rndis_query_complete *query_complete;
256 query_complete = &request->response_msg.msg.query_complete;
258 if (query_complete->status == RNDIS_STATUS_SUCCESS &&
259 query_complete->info_buflen == sizeof(u32)) {
260 memcpy(&link_status, (void *)((unsigned long)query_complete +
261 query_complete->info_buf_offset), sizeof(u32));
262 rdev->link_state = link_status != 0;
266 static void rndis_filter_receive_response(struct rndis_device *dev,
267 struct rndis_message *resp)
269 struct rndis_request *request = NULL;
272 struct net_device *ndev = dev->ndev;
274 spin_lock_irqsave(&dev->request_lock, flags);
275 list_for_each_entry(request, &dev->req_list, list_ent) {
277 * All request/response message contains RequestId as the 1st
280 if (request->request_msg.msg.init_req.req_id
281 == resp->msg.init_complete.req_id) {
286 spin_unlock_irqrestore(&dev->request_lock, flags);
290 sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
291 memcpy(&request->response_msg, resp,
293 if (request->request_msg.ndis_msg_type ==
294 RNDIS_MSG_QUERY && request->request_msg.msg.
295 query_req.oid == RNDIS_OID_GEN_MEDIA_CONNECT_STATUS)
296 rndis_set_link_state(dev, request);
299 "rndis response buffer overflow "
300 "detected (size %u max %zu)\n",
302 sizeof(struct rndis_message));
304 if (resp->ndis_msg_type ==
306 /* does not have a request id field */
307 request->response_msg.msg.reset_complete.
308 status = RNDIS_STATUS_BUFFER_OVERFLOW;
310 request->response_msg.msg.
311 init_complete.status =
312 RNDIS_STATUS_BUFFER_OVERFLOW;
316 complete(&request->wait_event);
319 "no rndis request found for this response "
320 "(id 0x%x res type 0x%x)\n",
321 resp->msg.init_complete.req_id,
322 resp->ndis_msg_type);
327 * Get the Per-Packet-Info with the specified type
328 * return NULL if not found.
330 static inline void *rndis_get_ppi(struct rndis_packet *rpkt, u32 type)
332 struct rndis_per_packet_info *ppi;
335 if (rpkt->per_pkt_info_offset == 0)
338 ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
339 rpkt->per_pkt_info_offset);
340 len = rpkt->per_pkt_info_len;
343 if (ppi->type == type)
344 return (void *)((ulong)ppi + ppi->ppi_offset);
346 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
352 static int rndis_filter_receive_data(struct net_device *ndev,
353 struct rndis_device *dev,
354 struct rndis_message *msg,
355 struct vmbus_channel *channel,
356 void *data, u32 data_buflen)
358 struct rndis_packet *rndis_pkt = &msg->msg.pkt;
359 const struct ndis_tcp_ip_checksum_info *csum_info;
360 const struct ndis_pkt_8021q_info *vlan;
363 /* Remove the rndis header and pass it back up the stack */
364 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
366 data_buflen -= data_offset;
369 * Make sure we got a valid RNDIS message, now total_data_buflen
370 * should be the data packet size plus the trailer padding size
372 if (unlikely(data_buflen < rndis_pkt->data_len)) {
373 netdev_err(dev->ndev, "rndis message buffer "
374 "overflow detected (got %u, min %u)"
375 "...dropping this message!\n",
376 data_buflen, rndis_pkt->data_len);
377 return NVSP_STAT_FAIL;
380 vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO);
383 * Remove the rndis trailer padding from rndis packet message
384 * rndis_pkt->data_len tell us the real data length, we only copy
385 * the data packet to the stack, without the rndis trailer padding
387 data = (void *)((unsigned long)data + data_offset);
388 csum_info = rndis_get_ppi(rndis_pkt, TCPIP_CHKSUM_PKTINFO);
389 return netvsc_recv_callback(ndev, channel,
390 data, rndis_pkt->data_len,
394 int rndis_filter_receive(struct net_device *ndev,
395 struct netvsc_device *net_dev,
396 struct hv_device *dev,
397 struct vmbus_channel *channel,
398 void *data, u32 buflen)
400 struct net_device_context *net_device_ctx = netdev_priv(ndev);
401 struct rndis_device *rndis_dev = net_dev->extension;
402 struct rndis_message *rndis_msg = data;
404 /* Make sure the rndis device state is initialized */
405 if (unlikely(!rndis_dev)) {
406 netif_err(net_device_ctx, rx_err, ndev,
407 "got rndis message but no rndis device!\n");
408 return NVSP_STAT_FAIL;
411 if (unlikely(rndis_dev->state == RNDIS_DEV_UNINITIALIZED)) {
412 netif_err(net_device_ctx, rx_err, ndev,
413 "got rndis message uninitialized\n");
414 return NVSP_STAT_FAIL;
417 if (netif_msg_rx_status(net_device_ctx))
418 dump_rndis_message(dev, rndis_msg);
420 switch (rndis_msg->ndis_msg_type) {
421 case RNDIS_MSG_PACKET:
422 return rndis_filter_receive_data(ndev, rndis_dev, rndis_msg,
423 channel, data, buflen);
424 case RNDIS_MSG_INIT_C:
425 case RNDIS_MSG_QUERY_C:
426 case RNDIS_MSG_SET_C:
427 /* completion msgs */
428 rndis_filter_receive_response(rndis_dev, rndis_msg);
431 case RNDIS_MSG_INDICATE:
432 /* notification msgs */
433 netvsc_linkstatus_callback(dev, rndis_msg);
437 "unhandled rndis message (type %u len %u)\n",
438 rndis_msg->ndis_msg_type,
446 static int rndis_filter_query_device(struct rndis_device *dev, u32 oid,
447 void *result, u32 *result_size)
449 struct rndis_request *request;
450 u32 inresult_size = *result_size;
451 struct rndis_query_request *query;
452 struct rndis_query_complete *query_complete;
459 request = get_rndis_request(dev, RNDIS_MSG_QUERY,
460 RNDIS_MESSAGE_SIZE(struct rndis_query_request));
466 /* Setup the rndis query */
467 query = &request->request_msg.msg.query_req;
469 query->info_buf_offset = sizeof(struct rndis_query_request);
470 query->info_buflen = 0;
471 query->dev_vc_handle = 0;
473 if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) {
474 struct net_device_context *ndevctx = netdev_priv(dev->ndev);
475 struct netvsc_device *nvdev = ndevctx->nvdev;
476 struct ndis_offload *hwcaps;
477 u32 nvsp_version = nvdev->nvsp_version;
481 if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) {
482 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
483 size = NDIS_OFFLOAD_SIZE;
484 } else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) {
485 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2;
486 size = NDIS_OFFLOAD_SIZE_6_1;
488 ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1;
489 size = NDIS_OFFLOAD_SIZE_6_0;
492 request->request_msg.msg_len += size;
493 query->info_buflen = size;
494 hwcaps = (struct ndis_offload *)
495 ((unsigned long)query + query->info_buf_offset);
497 hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD;
498 hwcaps->header.revision = ndis_rev;
499 hwcaps->header.size = size;
501 } else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
502 struct ndis_recv_scale_cap *cap;
504 request->request_msg.msg_len +=
505 sizeof(struct ndis_recv_scale_cap);
506 query->info_buflen = sizeof(struct ndis_recv_scale_cap);
507 cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
508 query->info_buf_offset);
509 cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
510 cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
511 cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
514 ret = rndis_filter_send_request(dev, request);
518 wait_for_completion(&request->wait_event);
520 /* Copy the response back */
521 query_complete = &request->response_msg.msg.query_complete;
523 if (query_complete->info_buflen > inresult_size) {
529 (void *)((unsigned long)query_complete +
530 query_complete->info_buf_offset),
531 query_complete->info_buflen);
533 *result_size = query_complete->info_buflen;
537 put_rndis_request(dev, request);
542 /* Get the hardware offload capabilities */
544 rndis_query_hwcaps(struct rndis_device *dev, struct ndis_offload *caps)
546 u32 caps_len = sizeof(*caps);
549 memset(caps, 0, sizeof(*caps));
551 ret = rndis_filter_query_device(dev,
552 OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
557 if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) {
558 netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n",
563 if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) {
564 netdev_warn(dev->ndev, "invalid NDIS objrev %x\n",
565 caps->header.revision);
569 if (caps->header.size > caps_len ||
570 caps->header.size < NDIS_OFFLOAD_SIZE_6_0) {
571 netdev_warn(dev->ndev,
572 "invalid NDIS objsize %u, data size %u\n",
573 caps->header.size, caps_len);
580 static int rndis_filter_query_device_mac(struct rndis_device *dev)
584 return rndis_filter_query_device(dev,
585 RNDIS_OID_802_3_PERMANENT_ADDRESS,
586 dev->hw_mac_adr, &size);
589 #define NWADR_STR "NetworkAddress"
590 #define NWADR_STRLEN 14
592 int rndis_filter_set_device_mac(struct net_device *ndev, char *mac)
594 struct netvsc_device *nvdev = net_device_to_netvsc_device(ndev);
595 struct rndis_device *rdev = nvdev->extension;
596 struct rndis_request *request;
597 struct rndis_set_request *set;
598 struct rndis_config_parameter_info *cpi;
599 wchar_t *cfg_nwadr, *cfg_mac;
600 struct rndis_set_complete *set_complete;
601 char macstr[2*ETH_ALEN+1];
602 u32 extlen = sizeof(struct rndis_config_parameter_info) +
603 2*NWADR_STRLEN + 4*ETH_ALEN;
606 request = get_rndis_request(rdev, RNDIS_MSG_SET,
607 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
611 set = &request->request_msg.msg.set_req;
612 set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
613 set->info_buflen = extlen;
614 set->info_buf_offset = sizeof(struct rndis_set_request);
615 set->dev_vc_handle = 0;
617 cpi = (struct rndis_config_parameter_info *)((ulong)set +
618 set->info_buf_offset);
619 cpi->parameter_name_offset =
620 sizeof(struct rndis_config_parameter_info);
621 /* Multiply by 2 because host needs 2 bytes (utf16) for each char */
622 cpi->parameter_name_length = 2*NWADR_STRLEN;
623 cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
624 cpi->parameter_value_offset =
625 cpi->parameter_name_offset + cpi->parameter_name_length;
626 /* Multiply by 4 because each MAC byte displayed as 2 utf16 chars */
627 cpi->parameter_value_length = 4*ETH_ALEN;
629 cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
630 cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
631 ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
632 cfg_nwadr, NWADR_STRLEN);
635 snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
636 ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
637 cfg_mac, 2*ETH_ALEN);
641 ret = rndis_filter_send_request(rdev, request);
645 wait_for_completion(&request->wait_event);
647 set_complete = &request->response_msg.msg.set_complete;
648 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
649 netdev_err(ndev, "Fail to set MAC on host side:0x%x\n",
650 set_complete->status);
655 put_rndis_request(rdev, request);
660 rndis_filter_set_offload_params(struct net_device *ndev,
661 struct ndis_offload_params *req_offloads)
663 struct netvsc_device *nvdev = net_device_to_netvsc_device(ndev);
664 struct rndis_device *rdev = nvdev->extension;
665 struct rndis_request *request;
666 struct rndis_set_request *set;
667 struct ndis_offload_params *offload_params;
668 struct rndis_set_complete *set_complete;
669 u32 extlen = sizeof(struct ndis_offload_params);
671 u32 vsp_version = nvdev->nvsp_version;
673 if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
674 extlen = VERSION_4_OFFLOAD_SIZE;
675 /* On NVSP_PROTOCOL_VERSION_4 and below, we do not support
676 * UDP checksum offload.
678 req_offloads->udp_ip_v4_csum = 0;
679 req_offloads->udp_ip_v6_csum = 0;
682 request = get_rndis_request(rdev, RNDIS_MSG_SET,
683 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
687 set = &request->request_msg.msg.set_req;
688 set->oid = OID_TCP_OFFLOAD_PARAMETERS;
689 set->info_buflen = extlen;
690 set->info_buf_offset = sizeof(struct rndis_set_request);
691 set->dev_vc_handle = 0;
693 offload_params = (struct ndis_offload_params *)((ulong)set +
694 set->info_buf_offset);
695 *offload_params = *req_offloads;
696 offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
697 offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
698 offload_params->header.size = extlen;
700 ret = rndis_filter_send_request(rdev, request);
704 wait_for_completion(&request->wait_event);
705 set_complete = &request->response_msg.msg.set_complete;
706 if (set_complete->status != RNDIS_STATUS_SUCCESS) {
707 netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
708 set_complete->status);
713 put_rndis_request(rdev, request);
717 int rndis_filter_set_rss_param(struct rndis_device *rdev,
718 const u8 *rss_key, int num_queue)
720 struct net_device *ndev = rdev->ndev;
721 struct rndis_request *request;
722 struct rndis_set_request *set;
723 struct rndis_set_complete *set_complete;
724 u32 extlen = sizeof(struct ndis_recv_scale_param) +
725 4 * ITAB_NUM + NETVSC_HASH_KEYLEN;
726 struct ndis_recv_scale_param *rssp;
731 request = get_rndis_request(
733 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
737 set = &request->request_msg.msg.set_req;
738 set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
739 set->info_buflen = extlen;
740 set->info_buf_offset = sizeof(struct rndis_set_request);
741 set->dev_vc_handle = 0;
743 rssp = (struct ndis_recv_scale_param *)(set + 1);
744 rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
745 rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
746 rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
748 rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
749 NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
751 rssp->indirect_tabsize = 4*ITAB_NUM;
752 rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
753 rssp->hashkey_size = NETVSC_HASH_KEYLEN;
754 rssp->kashkey_offset = rssp->indirect_taboffset +
755 rssp->indirect_tabsize;
757 /* Set indirection table entries */
758 itab = (u32 *)(rssp + 1);
759 for (i = 0; i < ITAB_NUM; i++)
760 itab[i] = rdev->ind_table[i];
762 /* Set hask key values */
763 keyp = (u8 *)((unsigned long)rssp + rssp->kashkey_offset);
764 memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
766 ret = rndis_filter_send_request(rdev, request);
770 wait_for_completion(&request->wait_event);
771 set_complete = &request->response_msg.msg.set_complete;
772 if (set_complete->status == RNDIS_STATUS_SUCCESS)
773 memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
775 netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
776 set_complete->status);
781 put_rndis_request(rdev, request);
785 static int rndis_filter_query_device_link_status(struct rndis_device *dev)
787 u32 size = sizeof(u32);
791 ret = rndis_filter_query_device(dev,
792 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
793 &link_status, &size);
798 static int rndis_filter_query_link_speed(struct rndis_device *dev)
800 u32 size = sizeof(u32);
802 struct net_device_context *ndc;
805 ret = rndis_filter_query_device(dev, RNDIS_OID_GEN_LINK_SPEED,
809 ndc = netdev_priv(dev->ndev);
811 /* The link speed reported from host is in 100bps unit, so
812 * we convert it to Mbps here.
814 ndc->speed = link_speed / 10000;
820 static int rndis_filter_set_packet_filter(struct rndis_device *dev,
823 struct rndis_request *request;
824 struct rndis_set_request *set;
827 request = get_rndis_request(dev, RNDIS_MSG_SET,
828 RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
834 /* Setup the rndis set */
835 set = &request->request_msg.msg.set_req;
836 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
837 set->info_buflen = sizeof(u32);
838 set->info_buf_offset = sizeof(struct rndis_set_request);
840 memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
841 &new_filter, sizeof(u32));
843 ret = rndis_filter_send_request(dev, request);
845 wait_for_completion(&request->wait_event);
847 put_rndis_request(dev, request);
852 static void rndis_set_multicast(struct work_struct *w)
854 struct rndis_device *rdev
855 = container_of(w, struct rndis_device, mcast_work);
857 if (rdev->ndev->flags & IFF_PROMISC)
858 rndis_filter_set_packet_filter(rdev,
859 NDIS_PACKET_TYPE_PROMISCUOUS);
861 rndis_filter_set_packet_filter(rdev,
862 NDIS_PACKET_TYPE_BROADCAST |
863 NDIS_PACKET_TYPE_ALL_MULTICAST |
864 NDIS_PACKET_TYPE_DIRECTED);
867 void rndis_filter_update(struct netvsc_device *nvdev)
869 struct rndis_device *rdev = nvdev->extension;
871 schedule_work(&rdev->mcast_work);
874 static int rndis_filter_init_device(struct rndis_device *dev)
876 struct rndis_request *request;
877 struct rndis_initialize_request *init;
878 struct rndis_initialize_complete *init_complete;
881 struct netvsc_device *nvdev = net_device_to_netvsc_device(dev->ndev);
883 request = get_rndis_request(dev, RNDIS_MSG_INIT,
884 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
890 /* Setup the rndis set */
891 init = &request->request_msg.msg.init_req;
892 init->major_ver = RNDIS_MAJOR_VERSION;
893 init->minor_ver = RNDIS_MINOR_VERSION;
894 init->max_xfer_size = 0x4000;
896 dev->state = RNDIS_DEV_INITIALIZING;
898 ret = rndis_filter_send_request(dev, request);
900 dev->state = RNDIS_DEV_UNINITIALIZED;
904 wait_for_completion(&request->wait_event);
906 init_complete = &request->response_msg.msg.init_complete;
907 status = init_complete->status;
908 if (status == RNDIS_STATUS_SUCCESS) {
909 dev->state = RNDIS_DEV_INITIALIZED;
910 nvdev->max_pkt = init_complete->max_pkt_per_msg;
911 nvdev->pkt_align = 1 << init_complete->pkt_alignment_factor;
914 dev->state = RNDIS_DEV_UNINITIALIZED;
920 put_rndis_request(dev, request);
925 static bool netvsc_device_idle(const struct netvsc_device *nvdev)
929 if (atomic_read(&nvdev->num_outstanding_recvs) > 0)
932 for (i = 0; i < nvdev->num_chn; i++) {
933 const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
935 if (atomic_read(&nvchan->queue_sends) > 0)
942 static void rndis_filter_halt_device(struct rndis_device *dev)
944 struct rndis_request *request;
945 struct rndis_halt_request *halt;
946 struct net_device_context *net_device_ctx = netdev_priv(dev->ndev);
947 struct netvsc_device *nvdev = net_device_ctx->nvdev;
949 /* Attempt to do a rndis device halt */
950 request = get_rndis_request(dev, RNDIS_MSG_HALT,
951 RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
955 /* Setup the rndis set */
956 halt = &request->request_msg.msg.halt_req;
957 halt->req_id = atomic_inc_return(&dev->new_req_id);
959 /* Ignore return since this msg is optional. */
960 rndis_filter_send_request(dev, request);
962 dev->state = RNDIS_DEV_UNINITIALIZED;
965 nvdev->destroy = true;
967 /* Force flag to be ordered before waiting */
970 /* Wait for all send completions */
971 wait_event(nvdev->wait_drain, netvsc_device_idle(nvdev));
974 put_rndis_request(dev, request);
977 static int rndis_filter_open_device(struct rndis_device *dev)
981 if (dev->state != RNDIS_DEV_INITIALIZED)
984 ret = rndis_filter_set_packet_filter(dev,
985 NDIS_PACKET_TYPE_BROADCAST |
986 NDIS_PACKET_TYPE_ALL_MULTICAST |
987 NDIS_PACKET_TYPE_DIRECTED);
989 dev->state = RNDIS_DEV_DATAINITIALIZED;
994 static int rndis_filter_close_device(struct rndis_device *dev)
998 if (dev->state != RNDIS_DEV_DATAINITIALIZED)
1001 /* Make sure rndis_set_multicast doesn't re-enable filter! */
1002 cancel_work_sync(&dev->mcast_work);
1004 ret = rndis_filter_set_packet_filter(dev, 0);
1009 dev->state = RNDIS_DEV_INITIALIZED;
1014 static void netvsc_sc_open(struct vmbus_channel *new_sc)
1016 struct net_device *ndev =
1017 hv_get_drvdata(new_sc->primary_channel->device_obj);
1018 struct netvsc_device *nvscdev = net_device_to_netvsc_device(ndev);
1019 u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
1020 struct netvsc_channel *nvchan;
1023 if (chn_index >= nvscdev->num_chn)
1026 nvchan = nvscdev->chan_table + chn_index;
1028 = vzalloc(NETVSC_RECVSLOT_MAX * sizeof(struct recv_comp_data));
1030 if (!nvchan->mrc.buf)
1033 /* Because the device uses NAPI, all the interrupt batching and
1034 * control is done via Net softirq, not the channel handling
1036 set_channel_read_mode(new_sc, HV_CALL_ISR);
1038 /* Set the channel before opening.*/
1039 nvchan->channel = new_sc;
1040 netif_napi_add(ndev, &nvchan->napi,
1041 netvsc_poll, NAPI_POLL_WEIGHT);
1043 ret = vmbus_open(new_sc, nvscdev->ring_size * PAGE_SIZE,
1044 nvscdev->ring_size * PAGE_SIZE, NULL, 0,
1045 netvsc_channel_cb, nvchan);
1047 napi_enable(&nvchan->napi);
1049 netif_napi_del(&nvchan->napi);
1051 if (refcount_dec_and_test(&nvscdev->sc_offered))
1052 complete(&nvscdev->channel_init_wait);
1055 int rndis_filter_device_add(struct hv_device *dev,
1056 struct netvsc_device_info *device_info)
1058 struct net_device *net = hv_get_drvdata(dev);
1059 struct net_device_context *net_device_ctx = netdev_priv(net);
1060 struct netvsc_device *net_device;
1061 struct rndis_device *rndis_device;
1062 struct ndis_offload hwcaps;
1063 struct ndis_offload_params offloads;
1064 struct nvsp_message *init_packet;
1065 struct ndis_recv_scale_cap rsscap;
1066 u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
1067 unsigned int gso_max_size = GSO_MAX_SIZE;
1068 u32 mtu, size, num_rss_qs;
1069 const struct cpumask *node_cpu_mask;
1070 u32 num_possible_rss_qs;
1073 rndis_device = get_rndis_device();
1078 * Let the inner driver handle this first to create the netvsc channel
1079 * NOTE! Once the channel is created, we may get a receive callback
1080 * (RndisFilterOnReceive()) before this call is completed
1082 ret = netvsc_device_add(dev, device_info);
1084 kfree(rndis_device);
1088 /* Initialize the rndis device */
1089 net_device = net_device_ctx->nvdev;
1090 net_device->max_chn = 1;
1091 net_device->num_chn = 1;
1093 refcount_set(&net_device->sc_offered, 0);
1095 net_device->extension = rndis_device;
1096 rndis_device->ndev = net;
1098 /* Send the rndis initialization message */
1099 ret = rndis_filter_init_device(rndis_device);
1101 rndis_filter_device_remove(dev, net_device);
1105 /* Get the MTU from the host */
1107 ret = rndis_filter_query_device(rndis_device,
1108 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
1110 if (ret == 0 && size == sizeof(u32) && mtu < net->mtu)
1113 /* Get the mac address */
1114 ret = rndis_filter_query_device_mac(rndis_device);
1116 rndis_filter_device_remove(dev, net_device);
1120 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
1122 /* Find HW offload capabilities */
1123 ret = rndis_query_hwcaps(rndis_device, &hwcaps);
1125 rndis_filter_device_remove(dev, net_device);
1129 /* A value of zero means "no change"; now turn on what we want. */
1130 memset(&offloads, 0, sizeof(struct ndis_offload_params));
1132 /* Linux does not care about IP checksum, always does in kernel */
1133 offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED;
1135 /* Compute tx offload settings based on hw capabilities */
1136 net->hw_features = NETIF_F_RXCSUM;
1138 if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
1139 /* Can checksum TCP */
1140 net->hw_features |= NETIF_F_IP_CSUM;
1141 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP;
1143 offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1145 if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) {
1146 offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1147 net->hw_features |= NETIF_F_TSO;
1149 if (hwcaps.lsov2.ip4_maxsz < gso_max_size)
1150 gso_max_size = hwcaps.lsov2.ip4_maxsz;
1153 if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) {
1154 offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1155 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP;
1159 if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) {
1160 net->hw_features |= NETIF_F_IPV6_CSUM;
1162 offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1163 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP;
1165 if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) &&
1166 (hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) {
1167 offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
1168 net->hw_features |= NETIF_F_TSO6;
1170 if (hwcaps.lsov2.ip6_maxsz < gso_max_size)
1171 gso_max_size = hwcaps.lsov2.ip6_maxsz;
1174 if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) {
1175 offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
1176 net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP;
1180 netif_set_gso_max_size(net, gso_max_size);
1182 ret = rndis_filter_set_offload_params(net, &offloads);
1186 rndis_filter_query_device_link_status(rndis_device);
1188 netdev_dbg(net, "Device MAC %pM link state %s\n",
1189 rndis_device->hw_mac_adr,
1190 rndis_device->link_state ? "down" : "up");
1192 if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
1195 rndis_filter_query_link_speed(rndis_device);
1198 memset(&rsscap, 0, rsscap_size);
1199 ret = rndis_filter_query_device(rndis_device,
1200 OID_GEN_RECEIVE_SCALE_CAPABILITIES,
1201 &rsscap, &rsscap_size);
1202 if (ret || rsscap.num_recv_que < 2)
1206 * We will limit the VRSS channels to the number CPUs in the NUMA node
1207 * the primary channel is currently bound to.
1209 * This also guarantees that num_possible_rss_qs <= num_online_cpus
1211 node_cpu_mask = cpumask_of_node(cpu_to_node(dev->channel->target_cpu));
1212 num_possible_rss_qs = min_t(u32, cpumask_weight(node_cpu_mask),
1213 rsscap.num_recv_que);
1215 net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, num_possible_rss_qs);
1217 /* We will use the given number of channels if available. */
1218 net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
1220 for (i = 0; i < ITAB_NUM; i++)
1221 rndis_device->ind_table[i] = ethtool_rxfh_indir_default(i,
1222 net_device->num_chn);
1224 num_rss_qs = net_device->num_chn - 1;
1225 if (num_rss_qs == 0)
1228 refcount_set(&net_device->sc_offered, num_rss_qs);
1229 vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
1231 init_packet = &net_device->channel_init_pkt;
1232 memset(init_packet, 0, sizeof(struct nvsp_message));
1233 init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
1234 init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
1235 init_packet->msg.v5_msg.subchn_req.num_subchannels =
1236 net_device->num_chn - 1;
1237 ret = vmbus_sendpacket(dev->channel, init_packet,
1238 sizeof(struct nvsp_message),
1239 (unsigned long)init_packet,
1241 VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
1245 if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
1249 wait_for_completion(&net_device->channel_init_wait);
1251 net_device->num_chn = 1 +
1252 init_packet->msg.v5_msg.subchn_comp.num_subchannels;
1254 /* ignore failues from setting rss parameters, still have channels */
1255 rndis_filter_set_rss_param(rndis_device, netvsc_hash_key,
1256 net_device->num_chn);
1259 net_device->max_chn = 1;
1260 net_device->num_chn = 1;
1263 return 0; /* return 0 because primary channel can be used alone */
1266 rndis_filter_device_remove(dev, net_device);
1270 void rndis_filter_device_remove(struct hv_device *dev,
1271 struct netvsc_device *net_dev)
1273 struct rndis_device *rndis_dev = net_dev->extension;
1275 /* Halt and release the rndis device */
1276 rndis_filter_halt_device(rndis_dev);
1279 net_dev->extension = NULL;
1281 netvsc_device_remove(dev);
1284 int rndis_filter_open(struct netvsc_device *nvdev)
1289 if (atomic_inc_return(&nvdev->open_cnt) != 1)
1292 return rndis_filter_open_device(nvdev->extension);
1295 int rndis_filter_close(struct netvsc_device *nvdev)
1300 if (atomic_dec_return(&nvdev->open_cnt) != 0)
1303 return rndis_filter_close_device(nvdev->extension);