1/* 2 * Copyright (c) 2009, Microsoft Corporation. 3 * 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. 7 * 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 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple 15 * Place - Suite 330, Boston, MA 02111-1307 USA. 16 * 17 * Authors: 18 * Haiyang Zhang <haiyangz@microsoft.com> 19 * Hank Janssen <hjanssen@microsoft.com> 20 */ 21#include <linux/kernel.h> 22#include <linux/sched.h> 23#include <linux/wait.h> 24#include <linux/highmem.h> 25#include <linux/slab.h> 26#include <linux/io.h> 27#include <linux/if_ether.h> 28#include <linux/netdevice.h> 29#include <linux/if_vlan.h> 30 31#include "hyperv_net.h" 32 33 34struct rndis_request { 35 struct list_head list_ent; 36 struct completion wait_event; 37 38 /* 39 * FIXME: We assumed a fixed size response here. If we do ever need to 40 * handle a bigger response, we can either define a max response 41 * message or add a response buffer variable above this field 42 */ 43 struct rndis_message response_msg; 44 45 /* Simplify allocation by having a netvsc packet inline */ 46 struct hv_netvsc_packet pkt; 47 struct hv_page_buffer buf; 48 /* FIXME: We assumed a fixed size request here. */ 49 struct rndis_message request_msg; 50}; 51 52static void rndis_filter_send_completion(void *ctx); 53 54static void rndis_filter_send_request_completion(void *ctx); 55 56 57 58static struct rndis_device *get_rndis_device(void) 59{ 60 struct rndis_device *device; 61 62 device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL); 63 if (!device) 64 return NULL; 65 66 spin_lock_init(&device->request_lock); 67 68 INIT_LIST_HEAD(&device->req_list); 69 70 device->state = RNDIS_DEV_UNINITIALIZED; 71 72 return device; 73} 74 75static struct rndis_request *get_rndis_request(struct rndis_device *dev, 76 u32 msg_type, 77 u32 msg_len) 78{ 79 struct rndis_request *request; 80 struct rndis_message *rndis_msg; 81 struct rndis_set_request *set; 82 unsigned long flags; 83 84 request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL); 85 if (!request) 86 return NULL; 87 88 init_completion(&request->wait_event); 89 90 rndis_msg = &request->request_msg; 91 rndis_msg->ndis_msg_type = msg_type; 92 rndis_msg->msg_len = msg_len; 93 94 /* 95 * Set the request id. This field is always after the rndis header for 96 * request/response packet types so we just used the SetRequest as a 97 * template 98 */ 99 set = &rndis_msg->msg.set_req; 100 set->req_id = atomic_inc_return(&dev->new_req_id); 101 102 /* Add to the request list */ 103 spin_lock_irqsave(&dev->request_lock, flags); 104 list_add_tail(&request->list_ent, &dev->req_list); 105 spin_unlock_irqrestore(&dev->request_lock, flags); 106 107 return request; 108} 109 110static void put_rndis_request(struct rndis_device *dev, 111 struct rndis_request *req) 112{ 113 unsigned long flags; 114 115 spin_lock_irqsave(&dev->request_lock, flags); 116 list_del(&req->list_ent); 117 spin_unlock_irqrestore(&dev->request_lock, flags); 118 119 kfree(req); 120} 121 122static void dump_rndis_message(struct hv_device *hv_dev, 123 struct rndis_message *rndis_msg) 124{ 125 struct net_device *netdev; 126 struct netvsc_device *net_device; 127 128 net_device = hv_get_drvdata(hv_dev); 129 netdev = net_device->ndev; 130 131 switch (rndis_msg->ndis_msg_type) { 132 case REMOTE_NDIS_PACKET_MSG: 133 netdev_dbg(netdev, "REMOTE_NDIS_PACKET_MSG (len %u, " 134 "data offset %u data len %u, # oob %u, " 135 "oob offset %u, oob len %u, pkt offset %u, " 136 "pkt len %u\n", 137 rndis_msg->msg_len, 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); 145 break; 146 147 case REMOTE_NDIS_INITIALIZE_CMPLT: 148 netdev_dbg(netdev, "REMOTE_NDIS_INITIALIZE_CMPLT " 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, " 151 "pkt aligned %u)\n", 152 rndis_msg->msg_len, 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. 160 max_pkt_per_msg, 161 rndis_msg->msg.init_complete. 162 pkt_alignment_factor); 163 break; 164 165 case REMOTE_NDIS_QUERY_CMPLT: 166 netdev_dbg(netdev, "REMOTE_NDIS_QUERY_CMPLT " 167 "(len %u, id 0x%x, status 0x%x, buf len %u, " 168 "buf offset %u)\n", 169 rndis_msg->msg_len, 170 rndis_msg->msg.query_complete.req_id, 171 rndis_msg->msg.query_complete.status, 172 rndis_msg->msg.query_complete. 173 info_buflen, 174 rndis_msg->msg.query_complete. 175 info_buf_offset); 176 break; 177 178 case REMOTE_NDIS_SET_CMPLT: 179 netdev_dbg(netdev, 180 "REMOTE_NDIS_SET_CMPLT (len %u, id 0x%x, status 0x%x)\n", 181 rndis_msg->msg_len, 182 rndis_msg->msg.set_complete.req_id, 183 rndis_msg->msg.set_complete.status); 184 break; 185 186 case REMOTE_NDIS_INDICATE_STATUS_MSG: 187 netdev_dbg(netdev, "REMOTE_NDIS_INDICATE_STATUS_MSG " 188 "(len %u, status 0x%x, buf len %u, buf offset %u)\n", 189 rndis_msg->msg_len, 190 rndis_msg->msg.indicate_status.status, 191 rndis_msg->msg.indicate_status.status_buflen, 192 rndis_msg->msg.indicate_status.status_buf_offset); 193 break; 194 195 default: 196 netdev_dbg(netdev, "0x%x (len %u)\n", 197 rndis_msg->ndis_msg_type, 198 rndis_msg->msg_len); 199 break; 200 } 201} 202 203static int rndis_filter_send_request(struct rndis_device *dev, 204 struct rndis_request *req) 205{ 206 int ret; 207 struct hv_netvsc_packet *packet; 208 209 /* Setup the packet to send it */ 210 packet = &req->pkt; 211 212 packet->is_data_pkt = false; 213 packet->total_data_buflen = req->request_msg.msg_len; 214 packet->page_buf_cnt = 1; 215 216 packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >> 217 PAGE_SHIFT; 218 packet->page_buf[0].len = req->request_msg.msg_len; 219 packet->page_buf[0].offset = 220 (unsigned long)&req->request_msg & (PAGE_SIZE - 1); 221 222 packet->completion.send.send_completion_ctx = req;/* packet; */ 223 packet->completion.send.send_completion = 224 rndis_filter_send_request_completion; 225 packet->completion.send.send_completion_tid = (unsigned long)dev; 226 227 ret = netvsc_send(dev->net_dev->dev, packet); 228 return ret; 229} 230 231static void rndis_filter_receive_response(struct rndis_device *dev, 232 struct rndis_message *resp) 233{ 234 struct rndis_request *request = NULL; 235 bool found = false; 236 unsigned long flags; 237 struct net_device *ndev; 238 239 ndev = dev->net_dev->ndev; 240 241 spin_lock_irqsave(&dev->request_lock, flags); 242 list_for_each_entry(request, &dev->req_list, list_ent) { 243 /* 244 * All request/response message contains RequestId as the 1st 245 * field 246 */ 247 if (request->request_msg.msg.init_req.req_id 248 == resp->msg.init_complete.req_id) { 249 found = true; 250 break; 251 } 252 } 253 spin_unlock_irqrestore(&dev->request_lock, flags); 254 255 if (found) { 256 if (resp->msg_len <= sizeof(struct rndis_message)) { 257 memcpy(&request->response_msg, resp, 258 resp->msg_len); 259 } else { 260 netdev_err(ndev, 261 "rndis response buffer overflow " 262 "detected (size %u max %zu)\n", 263 resp->msg_len, 264 sizeof(struct rndis_filter_packet)); 265 266 if (resp->ndis_msg_type == 267 REMOTE_NDIS_RESET_CMPLT) { 268 /* does not have a request id field */ 269 request->response_msg.msg.reset_complete. 270 status = STATUS_BUFFER_OVERFLOW; 271 } else { 272 request->response_msg.msg. 273 init_complete.status = 274 STATUS_BUFFER_OVERFLOW; 275 } 276 } 277 278 complete(&request->wait_event); 279 } else { 280 netdev_err(ndev, 281 "no rndis request found for this response " 282 "(id 0x%x res type 0x%x)\n", 283 resp->msg.init_complete.req_id, 284 resp->ndis_msg_type); 285 } 286} 287 288static void rndis_filter_receive_indicate_status(struct rndis_device *dev, 289 struct rndis_message *resp) 290{ 291 struct rndis_indicate_status *indicate = 292 &resp->msg.indicate_status; 293 294 if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT) { 295 netvsc_linkstatus_callback( 296 dev->net_dev->dev, 1); 297 } else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT) { 298 netvsc_linkstatus_callback( 299 dev->net_dev->dev, 0); 300 } else { 301 /* 302 * TODO: 303 */ 304 } 305} 306 307/* 308 * Get the Per-Packet-Info with the specified type 309 * return NULL if not found. 310 */ 311static inline void *rndis_get_ppi(struct rndis_packet *rpkt, u32 type) 312{ 313 struct rndis_per_packet_info *ppi; 314 int len; 315 316 if (rpkt->per_pkt_info_offset == 0) 317 return NULL; 318 319 ppi = (struct rndis_per_packet_info *)((ulong)rpkt + 320 rpkt->per_pkt_info_offset); 321 len = rpkt->per_pkt_info_len; 322 323 while (len > 0) { 324 if (ppi->type == type) 325 return (void *)((ulong)ppi + ppi->ppi_offset); 326 len -= ppi->size; 327 ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size); 328 } 329 330 return NULL; 331} 332 333static void rndis_filter_receive_data(struct rndis_device *dev, 334 struct rndis_message *msg, 335 struct hv_netvsc_packet *pkt) 336{ 337 struct rndis_packet *rndis_pkt; 338 u32 data_offset; 339 struct ndis_pkt_8021q_info *vlan; 340 341 rndis_pkt = &msg->msg.pkt; 342 343 /* 344 * FIXME: Handle multiple rndis pkt msgs that maybe enclosed in this 345 * netvsc packet (ie TotalDataBufferLength != MessageLength) 346 */ 347 348 /* Remove the rndis header and pass it back up the stack */ 349 data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset; 350 351 pkt->total_data_buflen -= data_offset; 352 353 /* 354 * Make sure we got a valid RNDIS message, now total_data_buflen 355 * should be the data packet size plus the trailer padding size 356 */ 357 if (pkt->total_data_buflen < rndis_pkt->data_len) { 358 netdev_err(dev->net_dev->ndev, "rndis message buffer " 359 "overflow detected (got %u, min %u)" 360 "...dropping this message!\n", 361 pkt->total_data_buflen, rndis_pkt->data_len); 362 return; 363 } 364 365 /* 366 * Remove the rndis trailer padding from rndis packet message 367 * rndis_pkt->data_len tell us the real data length, we only copy 368 * the data packet to the stack, without the rndis trailer padding 369 */ 370 pkt->total_data_buflen = rndis_pkt->data_len; 371 pkt->data = (void *)((unsigned long)pkt->data + data_offset); 372 373 pkt->is_data_pkt = true; 374 375 vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO); 376 if (vlan) { 377 pkt->vlan_tci = VLAN_TAG_PRESENT | vlan->vlanid | 378 (vlan->pri << VLAN_PRIO_SHIFT); 379 } else { 380 pkt->vlan_tci = 0; 381 } 382 383 netvsc_recv_callback(dev->net_dev->dev, pkt); 384} 385 386int rndis_filter_receive(struct hv_device *dev, 387 struct hv_netvsc_packet *pkt) 388{ 389 struct netvsc_device *net_dev = hv_get_drvdata(dev); 390 struct rndis_device *rndis_dev; 391 struct rndis_message *rndis_msg; 392 struct net_device *ndev; 393 394 if (!net_dev) 395 return -EINVAL; 396 397 ndev = net_dev->ndev; 398 399 /* Make sure the rndis device state is initialized */ 400 if (!net_dev->extension) { 401 netdev_err(ndev, "got rndis message but no rndis device - " 402 "dropping this message!\n"); 403 return -ENODEV; 404 } 405 406 rndis_dev = (struct rndis_device *)net_dev->extension; 407 if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) { 408 netdev_err(ndev, "got rndis message but rndis device " 409 "uninitialized...dropping this message!\n"); 410 return -ENODEV; 411 } 412 413 rndis_msg = pkt->data; 414 415 dump_rndis_message(dev, rndis_msg); 416 417 switch (rndis_msg->ndis_msg_type) { 418 case REMOTE_NDIS_PACKET_MSG: 419 /* data msg */ 420 rndis_filter_receive_data(rndis_dev, rndis_msg, pkt); 421 break; 422 423 case REMOTE_NDIS_INITIALIZE_CMPLT: 424 case REMOTE_NDIS_QUERY_CMPLT: 425 case REMOTE_NDIS_SET_CMPLT: 426 /* completion msgs */ 427 rndis_filter_receive_response(rndis_dev, rndis_msg); 428 break; 429 430 case REMOTE_NDIS_INDICATE_STATUS_MSG: 431 /* notification msgs */ 432 rndis_filter_receive_indicate_status(rndis_dev, rndis_msg); 433 break; 434 default: 435 netdev_err(ndev, 436 "unhandled rndis message (type %u len %u)\n", 437 rndis_msg->ndis_msg_type, 438 rndis_msg->msg_len); 439 break; 440 } 441 442 return 0; 443} 444 445static int rndis_filter_query_device(struct rndis_device *dev, u32 oid, 446 void *result, u32 *result_size) 447{ 448 struct rndis_request *request; 449 u32 inresult_size = *result_size; 450 struct rndis_query_request *query; 451 struct rndis_query_complete *query_complete; 452 int ret = 0; 453 int t; 454 455 if (!result) 456 return -EINVAL; 457 458 *result_size = 0; 459 request = get_rndis_request(dev, REMOTE_NDIS_QUERY_MSG, 460 RNDIS_MESSAGE_SIZE(struct rndis_query_request)); 461 if (!request) { 462 ret = -ENOMEM; 463 goto cleanup; 464 } 465 466 /* Setup the rndis query */ 467 query = &request->request_msg.msg.query_req; 468 query->oid = oid; 469 query->info_buf_offset = sizeof(struct rndis_query_request); 470 query->info_buflen = 0; 471 query->dev_vc_handle = 0; 472 473 ret = rndis_filter_send_request(dev, request); 474 if (ret != 0) 475 goto cleanup; 476 477 t = wait_for_completion_timeout(&request->wait_event, 5*HZ); 478 if (t == 0) { 479 ret = -ETIMEDOUT; 480 goto cleanup; 481 } 482 483 /* Copy the response back */ 484 query_complete = &request->response_msg.msg.query_complete; 485 486 if (query_complete->info_buflen > inresult_size) { 487 ret = -1; 488 goto cleanup; 489 } 490 491 memcpy(result, 492 (void *)((unsigned long)query_complete + 493 query_complete->info_buf_offset), 494 query_complete->info_buflen); 495 496 *result_size = query_complete->info_buflen; 497 498cleanup: 499 if (request) 500 put_rndis_request(dev, request); 501 502 return ret; 503} 504 505static int rndis_filter_query_device_mac(struct rndis_device *dev) 506{ 507 u32 size = ETH_ALEN; 508 509 return rndis_filter_query_device(dev, 510 RNDIS_OID_802_3_PERMANENT_ADDRESS, 511 dev->hw_mac_adr, &size); 512} 513 514static int rndis_filter_query_device_link_status(struct rndis_device *dev) 515{ 516 u32 size = sizeof(u32); 517 u32 link_status; 518 int ret; 519 520 ret = rndis_filter_query_device(dev, 521 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS, 522 &link_status, &size); 523 dev->link_state = (link_status != 0) ? true : false; 524 525 return ret; 526} 527 528int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter) 529{ 530 struct rndis_request *request; 531 struct rndis_set_request *set; 532 struct rndis_set_complete *set_complete; 533 u32 status; 534 int ret, t; 535 struct net_device *ndev; 536 537 ndev = dev->net_dev->ndev; 538 539 request = get_rndis_request(dev, REMOTE_NDIS_SET_MSG, 540 RNDIS_MESSAGE_SIZE(struct rndis_set_request) + 541 sizeof(u32)); 542 if (!request) { 543 ret = -ENOMEM; 544 goto cleanup; 545 } 546 547 /* Setup the rndis set */ 548 set = &request->request_msg.msg.set_req; 549 set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER; 550 set->info_buflen = sizeof(u32); 551 set->info_buf_offset = sizeof(struct rndis_set_request); 552 553 memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request), 554 &new_filter, sizeof(u32)); 555 556 ret = rndis_filter_send_request(dev, request); 557 if (ret != 0) 558 goto cleanup; 559 560 t = wait_for_completion_timeout(&request->wait_event, 5*HZ); 561 562 if (t == 0) { 563 netdev_err(ndev, 564 "timeout before we got a set response...\n"); 565 /* 566 * We can't deallocate the request since we may still receive a 567 * send completion for it. 568 */ 569 goto exit; 570 } else { 571 set_complete = &request->response_msg.msg.set_complete; 572 status = set_complete->status; 573 } 574 575cleanup: 576 if (request) 577 put_rndis_request(dev, request); 578exit: 579 return ret; 580} 581 582 583static int rndis_filter_init_device(struct rndis_device *dev) 584{ 585 struct rndis_request *request; 586 struct rndis_initialize_request *init; 587 struct rndis_initialize_complete *init_complete; 588 u32 status; 589 int ret, t; 590 591 request = get_rndis_request(dev, REMOTE_NDIS_INITIALIZE_MSG, 592 RNDIS_MESSAGE_SIZE(struct rndis_initialize_request)); 593 if (!request) { 594 ret = -ENOMEM; 595 goto cleanup; 596 } 597 598 /* Setup the rndis set */ 599 init = &request->request_msg.msg.init_req; 600 init->major_ver = RNDIS_MAJOR_VERSION; 601 init->minor_ver = RNDIS_MINOR_VERSION; 602 /* FIXME: Use 1536 - rounded ethernet frame size */ 603 init->max_xfer_size = 2048; 604 605 dev->state = RNDIS_DEV_INITIALIZING; 606 607 ret = rndis_filter_send_request(dev, request); 608 if (ret != 0) { 609 dev->state = RNDIS_DEV_UNINITIALIZED; 610 goto cleanup; 611 } 612 613 614 t = wait_for_completion_timeout(&request->wait_event, 5*HZ); 615 616 if (t == 0) { 617 ret = -ETIMEDOUT; 618 goto cleanup; 619 } 620 621 init_complete = &request->response_msg.msg.init_complete; 622 status = init_complete->status; 623 if (status == RNDIS_STATUS_SUCCESS) { 624 dev->state = RNDIS_DEV_INITIALIZED; 625 ret = 0; 626 } else { 627 dev->state = RNDIS_DEV_UNINITIALIZED; 628 ret = -EINVAL; 629 } 630 631cleanup: 632 if (request) 633 put_rndis_request(dev, request); 634 635 return ret; 636} 637 638static void rndis_filter_halt_device(struct rndis_device *dev) 639{ 640 struct rndis_request *request; 641 struct rndis_halt_request *halt; 642 643 /* Attempt to do a rndis device halt */ 644 request = get_rndis_request(dev, REMOTE_NDIS_HALT_MSG, 645 RNDIS_MESSAGE_SIZE(struct rndis_halt_request)); 646 if (!request) 647 goto cleanup; 648 649 /* Setup the rndis set */ 650 halt = &request->request_msg.msg.halt_req; 651 halt->req_id = atomic_inc_return(&dev->new_req_id); 652 653 /* Ignore return since this msg is optional. */ 654 rndis_filter_send_request(dev, request); 655 656 dev->state = RNDIS_DEV_UNINITIALIZED; 657 658cleanup: 659 if (request) 660 put_rndis_request(dev, request); 661 return; 662} 663 664static int rndis_filter_open_device(struct rndis_device *dev) 665{ 666 int ret; 667 668 if (dev->state != RNDIS_DEV_INITIALIZED) 669 return 0; 670 671 ret = rndis_filter_set_packet_filter(dev, 672 NDIS_PACKET_TYPE_BROADCAST | 673 NDIS_PACKET_TYPE_ALL_MULTICAST | 674 NDIS_PACKET_TYPE_DIRECTED); 675 if (ret == 0) 676 dev->state = RNDIS_DEV_DATAINITIALIZED; 677 678 return ret; 679} 680 681static int rndis_filter_close_device(struct rndis_device *dev) 682{ 683 int ret; 684 685 if (dev->state != RNDIS_DEV_DATAINITIALIZED) 686 return 0; 687 688 ret = rndis_filter_set_packet_filter(dev, 0); 689 if (ret == 0) 690 dev->state = RNDIS_DEV_INITIALIZED; 691 692 return ret; 693} 694 695int rndis_filter_device_add(struct hv_device *dev, 696 void *additional_info) 697{ 698 int ret; 699 struct netvsc_device *net_device; 700 struct rndis_device *rndis_device; 701 struct netvsc_device_info *device_info = additional_info; 702 703 rndis_device = get_rndis_device(); 704 if (!rndis_device) 705 return -ENODEV; 706 707 /* 708 * Let the inner driver handle this first to create the netvsc channel 709 * NOTE! Once the channel is created, we may get a receive callback 710 * (RndisFilterOnReceive()) before this call is completed 711 */ 712 ret = netvsc_device_add(dev, additional_info); 713 if (ret != 0) { 714 kfree(rndis_device); 715 return ret; 716 } 717 718 719 /* Initialize the rndis device */ 720 net_device = hv_get_drvdata(dev); 721 722 net_device->extension = rndis_device; 723 rndis_device->net_dev = net_device; 724 725 /* Send the rndis initialization message */ 726 ret = rndis_filter_init_device(rndis_device); 727 if (ret != 0) { 728 /* 729 * TODO: If rndis init failed, we will need to shut down the 730 * channel 731 */ 732 } 733 734 /* Get the mac address */ 735 ret = rndis_filter_query_device_mac(rndis_device); 736 if (ret != 0) { 737 /* 738 * TODO: shutdown rndis device and the channel 739 */ 740 } 741 742 memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN); 743 744 rndis_filter_query_device_link_status(rndis_device); 745 746 device_info->link_state = rndis_device->link_state; 747 748 dev_info(&dev->device, "Device MAC %pM link state %s\n", 749 rndis_device->hw_mac_adr, 750 device_info->link_state ? "down" : "up"); 751 752 return ret; 753} 754 755void rndis_filter_device_remove(struct hv_device *dev) 756{ 757 struct netvsc_device *net_dev = hv_get_drvdata(dev); 758 struct rndis_device *rndis_dev = net_dev->extension; 759 760 /* Halt and release the rndis device */ 761 rndis_filter_halt_device(rndis_dev); 762 763 kfree(rndis_dev); 764 net_dev->extension = NULL; 765 766 netvsc_device_remove(dev); 767} 768 769 770int rndis_filter_open(struct hv_device *dev) 771{ 772 struct netvsc_device *net_device = hv_get_drvdata(dev); 773 774 if (!net_device) 775 return -EINVAL; 776 777 return rndis_filter_open_device(net_device->extension); 778} 779 780int rndis_filter_close(struct hv_device *dev) 781{ 782 struct netvsc_device *nvdev = hv_get_drvdata(dev); 783 784 if (!nvdev) 785 return -EINVAL; 786 787 return rndis_filter_close_device(nvdev->extension); 788} 789 790int rndis_filter_send(struct hv_device *dev, 791 struct hv_netvsc_packet *pkt) 792{ 793 int ret; 794 struct rndis_filter_packet *filter_pkt; 795 struct rndis_message *rndis_msg; 796 struct rndis_packet *rndis_pkt; 797 u32 rndis_msg_size; 798 bool isvlan = pkt->vlan_tci & VLAN_TAG_PRESENT; 799 800 /* Add the rndis header */ 801 filter_pkt = (struct rndis_filter_packet *)pkt->extension; 802 803 rndis_msg = &filter_pkt->msg; 804 rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); 805 if (isvlan) 806 rndis_msg_size += NDIS_VLAN_PPI_SIZE; 807 808 rndis_msg->ndis_msg_type = REMOTE_NDIS_PACKET_MSG; 809 rndis_msg->msg_len = pkt->total_data_buflen + 810 rndis_msg_size; 811 812 rndis_pkt = &rndis_msg->msg.pkt; 813 rndis_pkt->data_offset = sizeof(struct rndis_packet); 814 if (isvlan) 815 rndis_pkt->data_offset += NDIS_VLAN_PPI_SIZE; 816 rndis_pkt->data_len = pkt->total_data_buflen; 817 818 if (isvlan) { 819 struct rndis_per_packet_info *ppi; 820 struct ndis_pkt_8021q_info *vlan; 821 822 rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); 823 rndis_pkt->per_pkt_info_len = NDIS_VLAN_PPI_SIZE; 824 825 ppi = (struct rndis_per_packet_info *)((ulong)rndis_pkt + 826 rndis_pkt->per_pkt_info_offset); 827 ppi->size = NDIS_VLAN_PPI_SIZE; 828 ppi->type = IEEE_8021Q_INFO; 829 ppi->ppi_offset = sizeof(struct rndis_per_packet_info); 830 831 vlan = (struct ndis_pkt_8021q_info *)((ulong)ppi + 832 ppi->ppi_offset); 833 vlan->vlanid = pkt->vlan_tci & VLAN_VID_MASK; 834 vlan->pri = (pkt->vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 835 } 836 837 pkt->is_data_pkt = true; 838 pkt->page_buf[0].pfn = virt_to_phys(rndis_msg) >> PAGE_SHIFT; 839 pkt->page_buf[0].offset = 840 (unsigned long)rndis_msg & (PAGE_SIZE-1); 841 pkt->page_buf[0].len = rndis_msg_size; 842 843 /* Add one page_buf if the rndis msg goes beyond page boundary */ 844 if (pkt->page_buf[0].offset + rndis_msg_size > PAGE_SIZE) { 845 int i; 846 for (i = pkt->page_buf_cnt; i > 1; i--) 847 pkt->page_buf[i] = pkt->page_buf[i-1]; 848 pkt->page_buf_cnt++; 849 pkt->page_buf[0].len = PAGE_SIZE - pkt->page_buf[0].offset; 850 pkt->page_buf[1].pfn = virt_to_phys((void *)((ulong) 851 rndis_msg + pkt->page_buf[0].len)) >> PAGE_SHIFT; 852 pkt->page_buf[1].offset = 0; 853 pkt->page_buf[1].len = rndis_msg_size - pkt->page_buf[0].len; 854 } 855 856 /* Save the packet send completion and context */ 857 filter_pkt->completion = pkt->completion.send.send_completion; 858 filter_pkt->completion_ctx = 859 pkt->completion.send.send_completion_ctx; 860 861 /* Use ours */ 862 pkt->completion.send.send_completion = rndis_filter_send_completion; 863 pkt->completion.send.send_completion_ctx = filter_pkt; 864 865 ret = netvsc_send(dev, pkt); 866 if (ret != 0) { 867 /* 868 * Reset the completion to originals to allow retries from 869 * above 870 */ 871 pkt->completion.send.send_completion = 872 filter_pkt->completion; 873 pkt->completion.send.send_completion_ctx = 874 filter_pkt->completion_ctx; 875 } 876 877 return ret; 878} 879 880static void rndis_filter_send_completion(void *ctx) 881{ 882 struct rndis_filter_packet *filter_pkt = ctx; 883 884 /* Pass it back to the original handler */ 885 filter_pkt->completion(filter_pkt->completion_ctx); 886} 887 888 889static void rndis_filter_send_request_completion(void *ctx) 890{ 891 /* Noop */ 892} 893