drivers/net/netvsc/hn_rndis.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright (c) 2009-2018 Microsoft Corp.
   3  * Copyright (c) 2010-2012 Citrix Inc.
   4  * Copyright (c) 2012 NetApp Inc.
   5  * All rights reserved.
   6  */
   7
   8 #include <stdint.h>
   9 #include <string.h>
  10 #include <stdio.h>
  11 #include <errno.h>
  12 #include <unistd.h>
  13
  14 #include <rte_ethdev_driver.h>
  15 #include <rte_ethdev.h>
  16 #include <rte_string_fns.h>
  17 #include <rte_memzone.h>
  18 #include <rte_malloc.h>
  19 #include <rte_atomic.h>
  20 #include <rte_branch_prediction.h>
  21 #include <rte_ether.h>
  22 #include <rte_common.h>
  23 #include <rte_errno.h>
  24 #include <rte_cycles.h>
  25 #include <rte_memory.h>
  26 #include <rte_eal.h>
  27 #include <rte_dev.h>
  28 #include <rte_bus_vmbus.h>
  29
  30 #include "hn_logs.h"
  31 #include "hn_var.h"
  32 #include "hn_nvs.h"
  33 #include "hn_rndis.h"
  34 #include "ndis.h"
  35
  36 #define HN_RNDIS_XFER_SIZE              0x4000
  37
  38 #define HN_NDIS_TXCSUM_CAP_IP4          \
  39         (NDIS_TXCSUM_CAP_IP4 | NDIS_TXCSUM_CAP_IP4OPT)
  40 #define HN_NDIS_TXCSUM_CAP_TCP4         \
  41         (NDIS_TXCSUM_CAP_TCP4 | NDIS_TXCSUM_CAP_TCP4OPT)
  42 #define HN_NDIS_TXCSUM_CAP_TCP6         \
  43         (NDIS_TXCSUM_CAP_TCP6 | NDIS_TXCSUM_CAP_TCP6OPT | \
  44          NDIS_TXCSUM_CAP_IP6EXT)
  45 #define HN_NDIS_TXCSUM_CAP_UDP6         \
  46         (NDIS_TXCSUM_CAP_UDP6 | NDIS_TXCSUM_CAP_IP6EXT)
  47 #define HN_NDIS_LSOV2_CAP_IP6           \
  48         (NDIS_LSOV2_CAP_IP6EXT | NDIS_LSOV2_CAP_TCP6OPT)
  49
  50 /* Get unique request id */
  51 static inline uint32_t
  52 hn_rndis_rid(struct hn_data *hv)
  53 {
  54         uint32_t rid;
  55
  56         do {
  57                 rid = rte_atomic32_add_return(&hv->rndis_req_id, 1);
  58         } while (rid == 0);
  59
  60         return rid;
  61 }
  62
  63 static void *hn_rndis_alloc(struct hn_data *hv, size_t size)
  64 {
  65         return rte_zmalloc_socket("RNDIS", size, PAGE_SIZE,
  66                                  hv->vmbus->device.numa_node);
  67 }
  68
  69 #ifdef RTE_LIBRTE_NETVSC_DEBUG_DUMP
  70 void hn_rndis_dump(const void *buf)
  71 {
  72         const union {
  73                 struct rndis_msghdr hdr;
  74                 struct rndis_packet_msg pkt;
  75                 struct rndis_init_req init_request;
  76                 struct rndis_init_comp init_complete;
  77                 struct rndis_halt_req halt;
  78                 struct rndis_query_req query_request;
  79                 struct rndis_query_comp query_complete;
  80                 struct rndis_set_req set_request;
  81                 struct rndis_set_comp set_complete;
  82                 struct rndis_reset_req reset_request;
  83                 struct rndis_reset_comp reset_complete;
  84                 struct rndis_keepalive_req keepalive_request;
  85                 struct rndis_keepalive_comp keepalive_complete;
  86                 struct rndis_status_msg indicate_status;
  87         } *rndis_msg = buf;
  88
  89         switch (rndis_msg->hdr.type) {
  90         case RNDIS_PACKET_MSG: {
  91                 const struct rndis_pktinfo *ppi;
  92                 unsigned int ppi_len;
  93
  94                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
  95                             "RNDIS_MSG_PACKET (len %u, data %u:%u, # oob %u %u:%u, pkt %u:%u)\n",
  96                             rndis_msg->pkt.len,
  97                             rndis_msg->pkt.dataoffset,
  98                             rndis_msg->pkt.datalen,
  99                             rndis_msg->pkt.oobdataelements,
 100                             rndis_msg->pkt.oobdataoffset,
 101                             rndis_msg->pkt.oobdatalen,
 102                             rndis_msg->pkt.pktinfooffset,
 103                             rndis_msg->pkt.pktinfolen);
 104
 105                 ppi = (const struct rndis_pktinfo *)
 106                         ((const char *)buf
 107                          + RNDIS_PACKET_MSG_OFFSET_ABS(rndis_msg->pkt.pktinfooffset));
 108
 109                 ppi_len = rndis_msg->pkt.pktinfolen;
 110                 while (ppi_len > 0) {
 111                         const void *ppi_data;
 112
 113                         ppi_data = ppi->data;
 114
 115                         rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 116                                 "    PPI (size %u, type %u, offs %u data %#x)\n",
 117                                 ppi->size, ppi->type, ppi->offset,
 118                                 *(const uint32_t *)ppi_data);
 119                         if (ppi->size == 0)
 120                                 break;
 121                         ppi_len -= ppi->size;
 122                         ppi = (const struct rndis_pktinfo *)
 123                                 ((const char *)ppi + ppi->size);
 124                 }
 125                 break;
 126         }
 127         case RNDIS_INITIALIZE_MSG:
 128                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 129                             "RNDIS_MSG_INIT (len %u id %#x, ver %u.%u max xfer %u)\n",
 130                             rndis_msg->init_request.len,
 131                             rndis_msg->init_request.rid,
 132                             rndis_msg->init_request.ver_major,
 133                             rndis_msg->init_request.ver_minor,
 134                             rndis_msg->init_request.max_xfersz);
 135                 break;
 136
 137         case RNDIS_INITIALIZE_CMPLT:
 138                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 139                             "RNDIS_MSG_INIT_C (len %u, id %#x, status 0x%x, vers %u.%u, "
 140                             "flags %d, max xfer %u, max pkts %u, aligned %u)\n",
 141                             rndis_msg->init_complete.len,
 142                             rndis_msg->init_complete.rid,
 143                             rndis_msg->init_complete.status,
 144                             rndis_msg->init_complete.ver_major,
 145                             rndis_msg->init_complete.ver_minor,
 146                             rndis_msg->init_complete.devflags,
 147                             rndis_msg->init_complete.pktmaxsz,
 148                             rndis_msg->init_complete.pktmaxcnt,
 149                             rndis_msg->init_complete.align);
 150                 break;
 151
 152         case RNDIS_HALT_MSG:
 153                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 154                             "RNDIS_HALT (len %u id %#x)\n",
 155                             rndis_msg->halt.len, rndis_msg->halt.rid);
 156                 break;
 157
 158         case RNDIS_QUERY_MSG:
 159                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 160                             "RNDIS_QUERY (len %u, id %#x, oid %#x, info %u:%u)\n",
 161                             rndis_msg->query_request.len,
 162                             rndis_msg->query_request.rid,
 163                             rndis_msg->query_request.oid,
 164                             rndis_msg->query_request.infobuflen,
 165                             rndis_msg->query_request.infobufoffset);
 166                 break;
 167
 168         case RNDIS_QUERY_CMPLT:
 169                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 170                             "RNDIS_MSG_QUERY_C (len %u, id %#x, status 0x%x, buf %u:%u)\n",
 171                             rndis_msg->query_complete.len,
 172                             rndis_msg->query_complete.rid,
 173                             rndis_msg->query_complete.status,
 174                             rndis_msg->query_complete.infobuflen,
 175                             rndis_msg->query_complete.infobufoffset);
 176                 break;
 177
 178         case RNDIS_SET_MSG:
 179                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 180                             "RNDIS_SET (len %u, id %#x, oid %#x, info %u:%u)\n",
 181                             rndis_msg->set_request.len,
 182                             rndis_msg->set_request.rid,
 183                             rndis_msg->set_request.oid,
 184                             rndis_msg->set_request.infobuflen,
 185                             rndis_msg->set_request.infobufoffset);
 186                 break;
 187
 188         case RNDIS_SET_CMPLT:
 189                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 190                             "RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
 191                             rndis_msg->set_complete.len,
 192                             rndis_msg->set_complete.rid,
 193                             rndis_msg->set_complete.status);
 194                 break;
 195
 196         case RNDIS_INDICATE_STATUS_MSG:
 197                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 198                             "RNDIS_MSG_INDICATE (len %u, status %#x, buf len %u, buf offset %u)\n",
 199                             rndis_msg->indicate_status.len,
 200                             rndis_msg->indicate_status.status,
 201                             rndis_msg->indicate_status.stbuflen,
 202                             rndis_msg->indicate_status.stbufoffset);
 203                 break;
 204
 205         case RNDIS_RESET_MSG:
 206                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 207                             "RNDIS_RESET (len %u, id %#x)\n",
 208                             rndis_msg->reset_request.len,
 209                             rndis_msg->reset_request.rid);
 210                 break;
 211
 212         case RNDIS_RESET_CMPLT:
 213                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 214                             "RNDIS_RESET_C (len %u, status %#x address %#x)\n",
 215                             rndis_msg->reset_complete.len,
 216                             rndis_msg->reset_complete.status,
 217                             rndis_msg->reset_complete.adrreset);
 218                 break;
 219
 220         case RNDIS_KEEPALIVE_MSG:
 221                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 222                             "RNDIS_KEEPALIVE (len %u, id %#x)\n",
 223                             rndis_msg->keepalive_request.len,
 224                             rndis_msg->keepalive_request.rid);
 225                 break;
 226
 227         case RNDIS_KEEPALIVE_CMPLT:
 228                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 229                             "RNDIS_KEEPALIVE_C (len %u, id %#x address %#x)\n",
 230                             rndis_msg->keepalive_complete.len,
 231                             rndis_msg->keepalive_complete.rid,
 232                             rndis_msg->keepalive_complete.status);
 233                 break;
 234
 235         default:
 236                 rte_log(RTE_LOG_DEBUG, hn_logtype_driver,
 237                             "RNDIS type %#x len %u\n",
 238                             rndis_msg->hdr.type,
 239                             rndis_msg->hdr.len);
 240                 break;
 241         }
 242 }
 243 #endif
 244
 245 static int hn_nvs_send_rndis_ctrl(struct vmbus_channel *chan,
 246                                   const void *req, uint32_t reqlen)
 247
 248 {
 249         struct hn_nvs_rndis nvs_rndis = {
 250                 .type = NVS_TYPE_RNDIS,
 251                 .rndis_mtype = NVS_RNDIS_MTYPE_CTRL,
 252                 .chim_idx = NVS_CHIM_IDX_INVALID,
 253                 .chim_sz = 0
 254         };
 255         struct vmbus_gpa sg;
 256         rte_iova_t addr;
 257
 258         addr = rte_malloc_virt2iova(req);
 259         if (unlikely(addr == RTE_BAD_IOVA)) {
 260                 PMD_DRV_LOG(ERR, "RNDIS send request can not get iova");
 261                 return -EINVAL;
 262         }
 263
 264         if (unlikely(reqlen > PAGE_SIZE)) {
 265                 PMD_DRV_LOG(ERR, "RNDIS request %u greater than page size",
 266                             reqlen);
 267                 return -EINVAL;
 268         }
 269
 270         sg.page = addr / PAGE_SIZE;
 271         sg.ofs  = addr & PAGE_MASK;
 272         sg.len  = reqlen;
 273
 274         if (sg.ofs + reqlen >  PAGE_SIZE) {
 275                 PMD_DRV_LOG(ERR, "RNDIS request crosses page bounary");
 276                 return -EINVAL;
 277         }
 278
 279         hn_rndis_dump(req);
 280
 281         return hn_nvs_send_sglist(chan, &sg, 1,
 282                                   &nvs_rndis, sizeof(nvs_rndis), 0U, NULL);
 283 }
 284
 285 void hn_rndis_link_status(struct rte_eth_dev *dev, const void *msg)
 286 {
 287         const struct rndis_status_msg *indicate = msg;
 288
 289         hn_rndis_dump(msg);
 290
 291         PMD_DRV_LOG(DEBUG, "link status %#x", indicate->status);
 292
 293         switch (indicate->status) {
 294         case RNDIS_STATUS_NETWORK_CHANGE:
 295         case RNDIS_STATUS_TASK_OFFLOAD_CURRENT_CONFIG:
 296                 /* ignore not in DPDK API */
 297                 break;
 298
 299         case RNDIS_STATUS_LINK_SPEED_CHANGE:
 300         case RNDIS_STATUS_MEDIA_CONNECT:
 301         case RNDIS_STATUS_MEDIA_DISCONNECT:
 302                 if (dev->data->dev_conf.intr_conf.lsc &&
 303                     hn_dev_link_update(dev, 0) == 0)
 304                         _rte_eth_dev_callback_process(dev,
 305                                                       RTE_ETH_EVENT_INTR_LSC,
 306                                                       NULL);
 307                 break;
 308         default:
 309                 PMD_DRV_LOG(NOTICE, "unknown RNDIS indication: %#x",
 310                             indicate->status);
 311         }
 312 }
 313
 314 /* Callback from hn_process_events when response is visible */
 315 void hn_rndis_receive_response(struct hn_data *hv,
 316                                const void *data, uint32_t len)
 317 {
 318         const struct rndis_init_comp *hdr = data;
 319
 320         hn_rndis_dump(data);
 321
 322         if (len < sizeof(3 * sizeof(uint32_t))) {
 323                 PMD_DRV_LOG(ERR,
 324                             "missing RNDIS header %u", len);
 325                 return;
 326         }
 327
 328         if (len < hdr->len) {
 329                 PMD_DRV_LOG(ERR,
 330                             "truncated RNDIS response %u", len);
 331                 return;
 332         }
 333
 334         if  (len > sizeof(hv->rndis_resp)) {
 335                 PMD_DRV_LOG(NOTICE,
 336                             "RNDIS response exceeds buffer");
 337                 len = sizeof(hv->rndis_resp);
 338         }
 339
 340         if (hdr->rid == 0) {
 341                 PMD_DRV_LOG(NOTICE,
 342                             "RNDIS response id zero!");
 343         }
 344
 345         memcpy(hv->rndis_resp, data, len);
 346
 347         /* make sure response copied before update */
 348         rte_smp_wmb();
 349
 350         if (rte_atomic32_cmpset(&hv->rndis_pending, hdr->rid, 0) == 0) {
 351                 PMD_DRV_LOG(ERR,
 352                             "received id %#x pending id %#x",
 353                             hdr->rid, (uint32_t)hv->rndis_pending);
 354         }
 355 }
 356
 357 /* Do request/response transaction */
 358 static int hn_rndis_exec1(struct hn_data *hv,
 359                           const void *req, uint32_t reqlen,
 360                           void *comp, uint32_t comp_len)
 361 {
 362         const struct rndis_halt_req *hdr = req;
 363         uint32_t rid = hdr->rid;
 364         struct vmbus_channel *chan = hn_primary_chan(hv);
 365         int error;
 366
 367         if (comp_len > sizeof(hv->rndis_resp)) {
 368                 PMD_DRV_LOG(ERR,
 369                             "Expected completion size %u exceeds buffer %zu",
 370                             comp_len, sizeof(hv->rndis_resp));
 371                 return -EIO;
 372         }
 373
 374         if (comp != NULL &&
 375             rte_atomic32_cmpset(&hv->rndis_pending, 0, rid) == 0) {
 376                 PMD_DRV_LOG(ERR,
 377                             "Request already pending");
 378                 return -EBUSY;
 379         }
 380
 381         error = hn_nvs_send_rndis_ctrl(chan, req, reqlen);
 382         if (error) {
 383                 PMD_DRV_LOG(ERR, "RNDIS ctrl send failed: %d", error);
 384                 return error;
 385         }
 386
 387         if (comp) {
 388                 /* Poll primary channel until response received */
 389                 while (hv->rndis_pending == rid)
 390                         hn_process_events(hv, 0, 1);
 391
 392                 memcpy(comp, hv->rndis_resp, comp_len);
 393         }
 394
 395         return 0;
 396 }
 397
 398 /* Do transaction and validate response */
 399 static int hn_rndis_execute(struct hn_data *hv, uint32_t rid,
 400                             const void *req, uint32_t reqlen,
 401                             void *comp, uint32_t comp_len, uint32_t comp_type)
 402 {
 403         const struct rndis_comp_hdr *hdr = comp;
 404         int ret;
 405
 406         memset(comp, 0, comp_len);
 407
 408         ret = hn_rndis_exec1(hv, req, reqlen, comp, comp_len);
 409         if (ret < 0)
 410                 return ret;
 411         /*
 412          * Check this RNDIS complete message.
 413          */
 414         if (unlikely(hdr->type != comp_type)) {
 415                 PMD_DRV_LOG(ERR,
 416                             "unexpected RNDIS response complete %#x expect %#x",
 417                             hdr->type, comp_type);
 418
 419                 return -ENXIO;
 420         }
 421         if (unlikely(hdr->rid != rid)) {
 422                 PMD_DRV_LOG(ERR,
 423                             "RNDIS comp rid mismatch %#x, expect %#x",
 424                             hdr->rid, rid);
 425                 return -EINVAL;
 426         }
 427
 428         /* All pass! */
 429         return 0;
 430 }
 431
 432 static int
 433 hn_rndis_query(struct hn_data *hv, uint32_t oid,
 434                const void *idata, uint32_t idlen,
 435                void *odata, uint32_t odlen)
 436 {
 437         struct rndis_query_req *req;
 438         struct rndis_query_comp *comp;
 439         uint32_t reqlen, comp_len;
 440         int error = -EIO;
 441         unsigned int ofs;
 442         uint32_t rid;
 443
 444         reqlen = sizeof(*req) + idlen;
 445         req = hn_rndis_alloc(hv, reqlen);
 446         if (req == NULL)
 447                 return -ENOMEM;
 448
 449         comp_len = sizeof(*comp) + odlen;
 450         comp = rte_zmalloc("QUERY", comp_len, PAGE_SIZE);
 451         if (!comp) {
 452                 error = -ENOMEM;
 453                 goto done;
 454         }
 455         comp->status = RNDIS_STATUS_PENDING;
 456
 457         rid = hn_rndis_rid(hv);
 458
 459         req->type = RNDIS_QUERY_MSG;
 460         req->len = reqlen;
 461         req->rid = rid;
 462         req->oid = oid;
 463         req->infobufoffset = RNDIS_QUERY_REQ_INFOBUFOFFSET;
 464         req->infobuflen = idlen;
 465
 466         /* Input data immediately follows RNDIS query. */
 467         memcpy(req + 1, idata, idlen);
 468
 469         error = hn_rndis_execute(hv, rid, req, reqlen,
 470                                  comp, comp_len, RNDIS_QUERY_CMPLT);
 471
 472         if (error)
 473                 goto done;
 474
 475         if (comp->status != RNDIS_STATUS_SUCCESS) {
 476                 PMD_DRV_LOG(ERR, "RNDIS query 0x%08x failed: status 0x%08x",
 477                             oid, comp->status);
 478                 error = -EINVAL;
 479                 goto done;
 480         }
 481
 482         if (comp->infobuflen == 0 || comp->infobufoffset == 0) {
 483                 /* No output data! */
 484                 PMD_DRV_LOG(ERR, "RNDIS query 0x%08x, no data", oid);
 485                 error = 0;
 486                 goto done;
 487         }
 488
 489         /*
 490          * Check output data length and offset.
 491          */
 492         /* ofs is the offset from the beginning of comp. */
 493         ofs = RNDIS_QUERY_COMP_INFOBUFOFFSET_ABS(comp->infobufoffset);
 494         if (ofs < sizeof(*comp) || ofs + comp->infobuflen > comp_len) {
 495                 PMD_DRV_LOG(ERR, "RNDIS query invalid comp ib off/len, %u/%u",
 496                             comp->infobufoffset, comp->infobuflen);
 497                 error = -EINVAL;
 498                 goto done;
 499         }
 500
 501         /* Save output data. */
 502         if (comp->infobuflen < odlen)
 503                 odlen = comp->infobuflen;
 504
 505         /* ofs is the offset from the beginning of comp. */
 506         memcpy(odata, (const char *)comp + ofs, odlen);
 507
 508         error = 0;
 509 done:
 510         rte_free(comp);
 511         rte_free(req);
 512         return error;
 513 }
 514
 515 static int
 516 hn_rndis_halt(struct hn_data *hv)
 517 {
 518         struct rndis_halt_req *halt;
 519
 520         halt = hn_rndis_alloc(hv, sizeof(*halt));
 521         if (halt == NULL)
 522                 return -ENOMEM;
 523
 524         halt->type = RNDIS_HALT_MSG;
 525         halt->len = sizeof(*halt);
 526         halt->rid = hn_rndis_rid(hv);
 527
 528         /* No RNDIS completion; rely on NVS message send completion */
 529         hn_rndis_exec1(hv, halt, sizeof(*halt), NULL, 0);
 530
 531         rte_free(halt);
 532
 533         PMD_INIT_LOG(DEBUG, "RNDIS halt done");
 534         return 0;
 535 }
 536
 537 static int
 538 hn_rndis_query_hwcaps(struct hn_data *hv, struct ndis_offload *caps)
 539 {
 540         struct ndis_offload in;
 541         uint32_t caps_len, size;
 542         int error;
 543
 544         memset(caps, 0, sizeof(*caps));
 545         memset(&in, 0, sizeof(in));
 546         in.ndis_hdr.ndis_type = NDIS_OBJTYPE_OFFLOAD;
 547
 548         if (hv->ndis_ver >= NDIS_VERSION_6_30) {
 549                 in.ndis_hdr.ndis_rev = NDIS_OFFLOAD_REV_3;
 550                 size = NDIS_OFFLOAD_SIZE;
 551         } else if (hv->ndis_ver >= NDIS_VERSION_6_1) {
 552                 in.ndis_hdr.ndis_rev = NDIS_OFFLOAD_REV_2;
 553                 size = NDIS_OFFLOAD_SIZE_6_1;
 554         } else {
 555                 in.ndis_hdr.ndis_rev = NDIS_OFFLOAD_REV_1;
 556                 size = NDIS_OFFLOAD_SIZE_6_0;
 557         }
 558         in.ndis_hdr.ndis_size = size;
 559
 560         caps_len = NDIS_OFFLOAD_SIZE;
 561         error = hn_rndis_query(hv, OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
 562                                &in, size, caps, caps_len);
 563         if (error)
 564                 return error;
 565
 566         /* Preliminary verification. */
 567         if (caps->ndis_hdr.ndis_type != NDIS_OBJTYPE_OFFLOAD) {
 568                 PMD_DRV_LOG(NOTICE, "invalid NDIS objtype 0x%02x",
 569                             caps->ndis_hdr.ndis_type);
 570                 return -EINVAL;
 571         }
 572         if (caps->ndis_hdr.ndis_rev < NDIS_OFFLOAD_REV_1) {
 573                 PMD_DRV_LOG(NOTICE, "invalid NDIS objrev 0x%02x",
 574                             caps->ndis_hdr.ndis_rev);
 575                 return -EINVAL;
 576         }
 577         if (caps->ndis_hdr.ndis_size > caps_len) {
 578                 PMD_DRV_LOG(NOTICE, "invalid NDIS objsize %u, data size %u",
 579                             caps->ndis_hdr.ndis_size, caps_len);
 580                 return -EINVAL;
 581         } else if (caps->ndis_hdr.ndis_size < NDIS_OFFLOAD_SIZE_6_0) {
 582                 PMD_DRV_LOG(NOTICE, "invalid NDIS objsize %u",
 583                             caps->ndis_hdr.ndis_size);
 584                 return -EINVAL;
 585         }
 586
 587         return 0;
 588 }
 589
 590 int
 591 hn_rndis_query_rsscaps(struct hn_data *hv,
 592                        unsigned int *rxr_cnt0)
 593 {
 594         struct ndis_rss_caps in, caps;
 595         unsigned int indsz, rxr_cnt;
 596         uint32_t caps_len;
 597         int error;
 598
 599         *rxr_cnt0 = 0;
 600
 601         if (hv->ndis_ver < NDIS_VERSION_6_20) {
 602                 PMD_DRV_LOG(DEBUG, "RSS not supported on this host");
 603                 return -EOPNOTSUPP;
 604         }
 605
 606         memset(&in, 0, sizeof(in));
 607         in.ndis_hdr.ndis_type = NDIS_OBJTYPE_RSS_CAPS;
 608         in.ndis_hdr.ndis_rev = NDIS_RSS_CAPS_REV_2;
 609         in.ndis_hdr.ndis_size = NDIS_RSS_CAPS_SIZE;
 610
 611         caps_len = NDIS_RSS_CAPS_SIZE;
 612         error = hn_rndis_query(hv, OID_GEN_RECEIVE_SCALE_CAPABILITIES,
 613                                &in, NDIS_RSS_CAPS_SIZE,
 614                                &caps, caps_len);
 615         if (error)
 616                 return error;
 617
 618         PMD_INIT_LOG(DEBUG, "RX rings %u indirect %u caps %#x",
 619                      caps.ndis_nrxr, caps.ndis_nind, caps.ndis_caps);
 620         /*
 621          * Preliminary verification.
 622          */
 623         if (caps.ndis_hdr.ndis_type != NDIS_OBJTYPE_RSS_CAPS) {
 624                 PMD_DRV_LOG(ERR, "invalid NDIS objtype 0x%02x",
 625                             caps.ndis_hdr.ndis_type);
 626                 return -EINVAL;
 627         }
 628         if (caps.ndis_hdr.ndis_rev < NDIS_RSS_CAPS_REV_1) {
 629                 PMD_DRV_LOG(ERR, "invalid NDIS objrev 0x%02x",
 630                             caps.ndis_hdr.ndis_rev);
 631                 return -EINVAL;
 632         }
 633         if (caps.ndis_hdr.ndis_size > caps_len) {
 634                 PMD_DRV_LOG(ERR,
 635                             "invalid NDIS objsize %u, data size %u",
 636                             caps.ndis_hdr.ndis_size, caps_len);
 637                 return -EINVAL;
 638         } else if (caps.ndis_hdr.ndis_size < NDIS_RSS_CAPS_SIZE_6_0) {
 639                 PMD_DRV_LOG(ERR, "invalid NDIS objsize %u",
 640                             caps.ndis_hdr.ndis_size);
 641                 return -EINVAL;
 642         }
 643
 644         /*
 645          * Save information for later RSS configuration.
 646          */
 647         if (caps.ndis_nrxr == 0) {
 648                 PMD_DRV_LOG(ERR, "0 RX rings!?");
 649                 return -EINVAL;
 650         }
 651         rxr_cnt = caps.ndis_nrxr;
 652
 653         if (caps.ndis_hdr.ndis_size == NDIS_RSS_CAPS_SIZE &&
 654             caps.ndis_hdr.ndis_rev >= NDIS_RSS_CAPS_REV_2) {
 655                 if (caps.ndis_nind > NDIS_HASH_INDCNT) {
 656                         PMD_DRV_LOG(ERR,
 657                                     "too many RSS indirect table entries %u",
 658                                     caps.ndis_nind);
 659                         return -EOPNOTSUPP;
 660                 }
 661                 if (!rte_is_power_of_2(caps.ndis_nind)) {
 662                         PMD_DRV_LOG(ERR,
 663                                     "RSS indirect table size is not power-of-2 %u",
 664                                     caps.ndis_nind);
 665                 }
 666
 667                 indsz = caps.ndis_nind;
 668         } else {
 669                 indsz = NDIS_HASH_INDCNT;
 670         }
 671
 672         if (indsz < rxr_cnt) {
 673                 PMD_DRV_LOG(NOTICE,
 674                             "# of RX rings (%d) > RSS indirect table size %d",
 675                             rxr_cnt, indsz);
 676                 rxr_cnt = indsz;
 677         }
 678
 679         hv->rss_offloads = 0;
 680         if (caps.ndis_caps & NDIS_RSS_CAP_IPV4)
 681                 hv->rss_offloads |= ETH_RSS_IPV4
 682                         | ETH_RSS_NONFRAG_IPV4_TCP
 683                         | ETH_RSS_NONFRAG_IPV4_UDP;
 684         if (caps.ndis_caps & NDIS_RSS_CAP_IPV6)
 685                 hv->rss_offloads |= ETH_RSS_IPV6
 686                         | ETH_RSS_NONFRAG_IPV6_TCP;
 687         if (caps.ndis_caps & NDIS_RSS_CAP_IPV6_EX)
 688                 hv->rss_offloads |= ETH_RSS_IPV6_EX
 689                         | ETH_RSS_IPV6_TCP_EX;
 690
 691         /* Commit! */
 692         *rxr_cnt0 = rxr_cnt;
 693
 694         return 0;
 695 }
 696
 697 static int
 698 hn_rndis_set(struct hn_data *hv, uint32_t oid, const void *data, uint32_t dlen)
 699 {
 700         struct rndis_set_req *req;
 701         struct rndis_set_comp comp;
 702         uint32_t reqlen, comp_len;
 703         uint32_t rid;
 704         int error;
 705
 706         reqlen = sizeof(*req) + dlen;
 707         req = rte_zmalloc("RNDIS_SET", reqlen, PAGE_SIZE);
 708         if (!req)
 709                 return -ENOMEM;
 710
 711         rid = hn_rndis_rid(hv);
 712         req->type = RNDIS_SET_MSG;
 713         req->len = reqlen;
 714         req->rid = rid;
 715         req->oid = oid;
 716         req->infobuflen = dlen;
 717         req->infobufoffset = RNDIS_SET_REQ_INFOBUFOFFSET;
 718
 719         /* Data immediately follows RNDIS set. */
 720         memcpy(req + 1, data, dlen);
 721
 722         comp_len = sizeof(comp);
 723         error = hn_rndis_execute(hv, rid, req, reqlen,
 724                                  &comp, comp_len,
 725                                  RNDIS_SET_CMPLT);
 726         if (error) {
 727                 PMD_DRV_LOG(ERR, "exec RNDIS set %#" PRIx32 " failed",
 728                             oid);
 729                 error = EIO;
 730                 goto done;
 731         }
 732
 733         if (comp.status != RNDIS_STATUS_SUCCESS) {
 734                 PMD_DRV_LOG(ERR,
 735                             "RNDIS set %#" PRIx32 " failed: status %#" PRIx32,
 736                             oid, comp.status);
 737                 error = EIO;
 738                 goto done;
 739         }
 740
 741 done:
 742         rte_free(req);
 743         return error;
 744 }
 745
 746 int hn_rndis_conf_offload(struct hn_data *hv,
 747                           uint64_t tx_offloads, uint64_t rx_offloads)
 748 {
 749         struct ndis_offload_params params;
 750         struct ndis_offload hwcaps;
 751         int error;
 752
 753         error = hn_rndis_query_hwcaps(hv, &hwcaps);
 754         if (error) {
 755                 PMD_DRV_LOG(ERR, "hwcaps query failed: %d", error);
 756                 return error;
 757         }
 758
 759         /* NOTE: 0 means "no change" */
 760         memset(&params, 0, sizeof(params));
 761
 762         params.ndis_hdr.ndis_type = NDIS_OBJTYPE_DEFAULT;
 763         if (hv->ndis_ver < NDIS_VERSION_6_30) {
 764                 params.ndis_hdr.ndis_rev = NDIS_OFFLOAD_PARAMS_REV_2;
 765                 params.ndis_hdr.ndis_size = NDIS_OFFLOAD_PARAMS_SIZE_6_1;
 766         } else {
 767                 params.ndis_hdr.ndis_rev = NDIS_OFFLOAD_PARAMS_REV_3;
 768                 params.ndis_hdr.ndis_size = NDIS_OFFLOAD_PARAMS_SIZE;
 769         }
 770
 771         if (tx_offloads & DEV_TX_OFFLOAD_TCP_CKSUM) {
 772                 if (hwcaps.ndis_csum.ndis_ip4_txcsum & NDIS_TXCSUM_CAP_TCP4)
 773                         params.ndis_tcp4csum = NDIS_OFFLOAD_PARAM_TX;
 774                 else
 775                         goto unsupported;
 776
 777                 if (hwcaps.ndis_csum.ndis_ip6_txcsum & NDIS_TXCSUM_CAP_TCP6)
 778                         params.ndis_tcp6csum = NDIS_OFFLOAD_PARAM_TX;
 779                 else
 780                         goto unsupported;
 781         }
 782
 783         if (rx_offloads & DEV_RX_OFFLOAD_TCP_CKSUM) {
 784                 if ((hwcaps.ndis_csum.ndis_ip4_rxcsum & NDIS_RXCSUM_CAP_TCP4)
 785                     == NDIS_RXCSUM_CAP_TCP4)
 786                         params.ndis_tcp4csum |= NDIS_OFFLOAD_PARAM_RX;
 787                 else
 788                         goto unsupported;
 789
 790                 if ((hwcaps.ndis_csum.ndis_ip6_rxcsum & NDIS_RXCSUM_CAP_TCP6)
 791                     == NDIS_RXCSUM_CAP_TCP6)
 792                         params.ndis_tcp6csum |= NDIS_OFFLOAD_PARAM_RX;
 793                 else
 794                         goto unsupported;
 795         }
 796
 797         if (tx_offloads & DEV_TX_OFFLOAD_UDP_CKSUM) {
 798                 if (hwcaps.ndis_csum.ndis_ip4_txcsum & NDIS_TXCSUM_CAP_UDP4)
 799                         params.ndis_udp4csum = NDIS_OFFLOAD_PARAM_TX;
 800                 else
 801                         goto unsupported;
 802
 803                 if ((hwcaps.ndis_csum.ndis_ip6_txcsum & NDIS_TXCSUM_CAP_UDP6)
 804                     == NDIS_TXCSUM_CAP_UDP6)
 805                         params.ndis_udp6csum = NDIS_OFFLOAD_PARAM_TX;
 806                 else
 807                         goto unsupported;
 808         }
 809
 810         if (rx_offloads & DEV_TX_OFFLOAD_UDP_CKSUM) {
 811                 if (hwcaps.ndis_csum.ndis_ip4_rxcsum & NDIS_RXCSUM_CAP_UDP4)
 812                         params.ndis_udp4csum |= NDIS_OFFLOAD_PARAM_RX;
 813                 else
 814                         goto unsupported;
 815
 816                 if (hwcaps.ndis_csum.ndis_ip6_rxcsum & NDIS_RXCSUM_CAP_UDP6)
 817                         params.ndis_udp6csum |= NDIS_OFFLOAD_PARAM_RX;
 818                 else
 819                         goto unsupported;
 820         }
 821
 822         if (tx_offloads & DEV_TX_OFFLOAD_IPV4_CKSUM) {
 823                 if ((hwcaps.ndis_csum.ndis_ip4_txcsum & NDIS_TXCSUM_CAP_IP4)
 824                     == NDIS_TXCSUM_CAP_IP4)
 825                         params.ndis_ip4csum = NDIS_OFFLOAD_PARAM_TX;
 826                 else
 827                         goto unsupported;
 828         }
 829         if (rx_offloads & DEV_RX_OFFLOAD_IPV4_CKSUM) {
 830                 if (hwcaps.ndis_csum.ndis_ip4_rxcsum & NDIS_RXCSUM_CAP_IP4)
 831                         params.ndis_ip4csum |= NDIS_OFFLOAD_PARAM_RX;
 832                 else
 833                         goto unsupported;
 834         }
 835
 836         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO) {
 837                 if (hwcaps.ndis_lsov2.ndis_ip4_encap & NDIS_OFFLOAD_ENCAP_8023)
 838                         params.ndis_lsov2_ip4 = NDIS_OFFLOAD_LSOV2_ON;
 839                 else
 840                         goto unsupported;
 841
 842                 if ((hwcaps.ndis_lsov2.ndis_ip6_opts & HN_NDIS_LSOV2_CAP_IP6)
 843                     == HN_NDIS_LSOV2_CAP_IP6)
 844                         params.ndis_lsov2_ip6 = NDIS_OFFLOAD_LSOV2_ON;
 845                 else
 846                         goto unsupported;
 847         }
 848
 849         error = hn_rndis_set(hv, OID_TCP_OFFLOAD_PARAMETERS, &params,
 850                              params.ndis_hdr.ndis_size);
 851         if (error) {
 852                 PMD_DRV_LOG(ERR, "offload config failed");
 853                 return error;
 854         }
 855
 856         return 0;
 857  unsupported:
 858         PMD_DRV_LOG(NOTICE,
 859                     "offload tx:%" PRIx64 " rx:%" PRIx64 " not supported by this version",
 860                     tx_offloads, rx_offloads);
 861         return -EINVAL;
 862 }
 863
 864 int hn_rndis_get_offload(struct hn_data *hv,
 865                          struct rte_eth_dev_info *dev_info)
 866 {
 867         struct ndis_offload hwcaps;
 868         int error;
 869
 870         memset(&hwcaps, 0, sizeof(hwcaps));
 871
 872         error = hn_rndis_query_hwcaps(hv, &hwcaps);
 873         if (error) {
 874                 PMD_DRV_LOG(ERR, "hwcaps query failed: %d", error);
 875                 return error;
 876         }
 877
 878         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
 879                                     DEV_TX_OFFLOAD_VLAN_INSERT;
 880
 881         if ((hwcaps.ndis_csum.ndis_ip4_txcsum & HN_NDIS_TXCSUM_CAP_IP4)
 882             == HN_NDIS_TXCSUM_CAP_IP4)
 883                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_IPV4_CKSUM;
 884
 885         if ((hwcaps.ndis_csum.ndis_ip4_txcsum & HN_NDIS_TXCSUM_CAP_TCP4)
 886             == HN_NDIS_TXCSUM_CAP_TCP4 &&
 887             (hwcaps.ndis_csum.ndis_ip6_txcsum & HN_NDIS_TXCSUM_CAP_TCP6)
 888             == HN_NDIS_TXCSUM_CAP_TCP6)
 889                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_CKSUM;
 890
 891         if ((hwcaps.ndis_csum.ndis_ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) &&
 892             (hwcaps.ndis_csum.ndis_ip6_txcsum & NDIS_TXCSUM_CAP_UDP6))
 893                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_UDP_CKSUM;
 894
 895         if ((hwcaps.ndis_lsov2.ndis_ip4_encap & NDIS_OFFLOAD_ENCAP_8023) &&
 896             (hwcaps.ndis_lsov2.ndis_ip6_opts & HN_NDIS_LSOV2_CAP_IP6)
 897             == HN_NDIS_LSOV2_CAP_IP6)
 898                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
 899
 900         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
 901
 902         if (hwcaps.ndis_csum.ndis_ip4_rxcsum & NDIS_RXCSUM_CAP_IP4)
 903                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_IPV4_CKSUM;
 904
 905         if ((hwcaps.ndis_csum.ndis_ip4_rxcsum & NDIS_RXCSUM_CAP_TCP4) &&
 906             (hwcaps.ndis_csum.ndis_ip6_rxcsum & NDIS_RXCSUM_CAP_TCP6))
 907                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_CKSUM;
 908
 909         if ((hwcaps.ndis_csum.ndis_ip4_rxcsum & NDIS_RXCSUM_CAP_UDP4) &&
 910             (hwcaps.ndis_csum.ndis_ip6_rxcsum & NDIS_RXCSUM_CAP_UDP6))
 911                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_UDP_CKSUM;
 912
 913         return 0;
 914 }
 915
 916 uint32_t
 917 hn_rndis_get_ptypes(struct hn_data *hv)
 918 {
 919         struct ndis_offload hwcaps;
 920         uint32_t ptypes;
 921         int error;
 922
 923         memset(&hwcaps, 0, sizeof(hwcaps));
 924
 925         error = hn_rndis_query_hwcaps(hv, &hwcaps);
 926         if (error) {
 927                 PMD_DRV_LOG(ERR, "hwcaps query failed: %d", error);
 928                 return RTE_PTYPE_L2_ETHER;
 929         }
 930
 931         ptypes = RTE_PTYPE_L2_ETHER;
 932
 933         if (hwcaps.ndis_csum.ndis_ip4_rxcsum & NDIS_RXCSUM_CAP_IP4)
 934                 ptypes |= RTE_PTYPE_L3_IPV4;
 935
 936         if ((hwcaps.ndis_csum.ndis_ip4_rxcsum & NDIS_RXCSUM_CAP_TCP4) ||
 937             (hwcaps.ndis_csum.ndis_ip6_rxcsum & NDIS_RXCSUM_CAP_TCP6))
 938                 ptypes |= RTE_PTYPE_L4_TCP;
 939
 940         if ((hwcaps.ndis_csum.ndis_ip4_rxcsum & NDIS_RXCSUM_CAP_UDP4) ||
 941             (hwcaps.ndis_csum.ndis_ip6_rxcsum & NDIS_RXCSUM_CAP_UDP6))
 942                 ptypes |= RTE_PTYPE_L4_UDP;
 943
 944         return ptypes;
 945 }
 946
 947 int
 948 hn_rndis_set_rxfilter(struct hn_data *hv, uint32_t filter)
 949 {
 950         int error;
 951
 952         error = hn_rndis_set(hv, OID_GEN_CURRENT_PACKET_FILTER,
 953                              &filter, sizeof(filter));
 954         if (error) {
 955                 PMD_DRV_LOG(ERR, "set RX filter %#" PRIx32 " failed: %d",
 956                             filter, error);
 957         } else {
 958                 PMD_DRV_LOG(DEBUG, "set RX filter %#" PRIx32 " done", filter);
 959         }
 960
 961         return error;
 962 }
 963
 964 int hn_rndis_conf_rss(struct hn_data *hv, uint32_t flags)
 965 {
 966         struct ndis_rssprm_toeplitz rssp;
 967         struct ndis_rss_params *prm = &rssp.rss_params;
 968         unsigned int i;
 969         int error;
 970
 971         memset(&rssp, 0, sizeof(rssp));
 972
 973         prm->ndis_hdr.ndis_type = NDIS_OBJTYPE_RSS_PARAMS;
 974         prm->ndis_hdr.ndis_rev = NDIS_RSS_PARAMS_REV_2;
 975         prm->ndis_hdr.ndis_size = sizeof(*prm);
 976         prm->ndis_flags = flags;
 977         prm->ndis_hash = hv->rss_hash;
 978         prm->ndis_indsize = sizeof(rssp.rss_ind[0]) * NDIS_HASH_INDCNT;
 979         prm->ndis_indoffset = offsetof(struct ndis_rssprm_toeplitz, rss_ind[0]);
 980         prm->ndis_keysize = NDIS_HASH_KEYSIZE_TOEPLITZ;
 981         prm->ndis_keyoffset = offsetof(struct ndis_rssprm_toeplitz, rss_key[0]);
 982
 983         for (i = 0; i < NDIS_HASH_INDCNT; i++)
 984                 rssp.rss_ind[i] = hv->rss_ind[i];
 985
 986         /* Set hask key values */
 987         memcpy(&rssp.rss_key, hv->rss_key, NDIS_HASH_KEYSIZE_TOEPLITZ);
 988
 989         error = hn_rndis_set(hv, OID_GEN_RECEIVE_SCALE_PARAMETERS,
 990                              &rssp, sizeof(rssp));
 991         if (error != 0) {
 992                 PMD_DRV_LOG(ERR,
 993                             "RSS config num queues=%u failed: %d",
 994                             hv->num_queues, error);
 995         }
 996         return error;
 997 }
 998
 999 static int hn_rndis_init(struct hn_data *hv)
1000 {
1001         struct rndis_init_req *req;
1002         struct rndis_init_comp comp;
1003         uint32_t comp_len, rid;
1004         int error;
1005
1006         req = hn_rndis_alloc(hv, sizeof(*req));
1007         if (!req) {
1008                 PMD_DRV_LOG(ERR, "no memory for RNDIS init");
1009                 return -ENXIO;
1010         }
1011
1012         rid = hn_rndis_rid(hv);
1013         req->type = RNDIS_INITIALIZE_MSG;
1014         req->len = sizeof(*req);
1015         req->rid = rid;
1016         req->ver_major = RNDIS_VERSION_MAJOR;
1017         req->ver_minor = RNDIS_VERSION_MINOR;
1018         req->max_xfersz = HN_RNDIS_XFER_SIZE;
1019
1020         comp_len = RNDIS_INIT_COMP_SIZE_MIN;
1021         error = hn_rndis_execute(hv, rid, req, sizeof(*req),
1022                                  &comp, comp_len,
1023                                  RNDIS_INITIALIZE_CMPLT);
1024         if (error)
1025                 goto done;
1026
1027         if (comp.status != RNDIS_STATUS_SUCCESS) {
1028                 PMD_DRV_LOG(ERR, "RNDIS init failed: status 0x%08x",
1029                             comp.status);
1030                 error = -EIO;
1031                 goto done;
1032         }
1033
1034         hv->rndis_agg_size = comp.pktmaxsz;
1035         hv->rndis_agg_pkts = comp.pktmaxcnt;
1036         hv->rndis_agg_align = 1U << comp.align;
1037
1038         if (hv->rndis_agg_align < sizeof(uint32_t)) {
1039                 /*
1040                  * The RNDIS packet message encap assumes that the RNDIS
1041                  * packet message is at least 4 bytes aligned.  Fix up the
1042                  * alignment here, if the remote side sets the alignment
1043                  * too low.
1044                  */
1045                 PMD_DRV_LOG(NOTICE,
1046                             "fixup RNDIS aggpkt align: %u -> %zu",
1047                             hv->rndis_agg_align, sizeof(uint32_t));
1048                 hv->rndis_agg_align = sizeof(uint32_t);
1049         }
1050
1051         PMD_INIT_LOG(INFO,
1052                      "RNDIS ver %u.%u, aggpkt size %u, aggpkt cnt %u, aggpkt align %u",
1053                      comp.ver_major, comp.ver_minor,
1054                      hv->rndis_agg_size, hv->rndis_agg_pkts,
1055                      hv->rndis_agg_align);
1056         error = 0;
1057 done:
1058         rte_free(req);
1059         return error;
1060 }
1061
1062 int
1063 hn_rndis_get_eaddr(struct hn_data *hv, uint8_t *eaddr)
1064 {
1065         uint32_t eaddr_len;
1066         int error;
1067
1068         eaddr_len = RTE_ETHER_ADDR_LEN;
1069         error = hn_rndis_query(hv, OID_802_3_PERMANENT_ADDRESS, NULL, 0,
1070                                eaddr, eaddr_len);
1071         if (error)
1072                 return error;
1073
1074         PMD_DRV_LOG(INFO, "MAC address %02x:%02x:%02x:%02x:%02x:%02x",
1075                     eaddr[0], eaddr[1], eaddr[2],
1076                     eaddr[3], eaddr[4], eaddr[5]);
1077         return 0;
1078 }
1079
1080 int
1081 hn_rndis_get_linkstatus(struct hn_data *hv)
1082 {
1083         return hn_rndis_query(hv, OID_GEN_MEDIA_CONNECT_STATUS, NULL, 0,
1084                               &hv->link_status, sizeof(uint32_t));
1085 }
1086
1087 int
1088 hn_rndis_get_linkspeed(struct hn_data *hv)
1089 {
1090         return hn_rndis_query(hv, OID_GEN_LINK_SPEED, NULL, 0,
1091                               &hv->link_speed, sizeof(uint32_t));
1092 }
1093
1094 int
1095 hn_rndis_attach(struct hn_data *hv)
1096 {
1097         /* Initialize RNDIS. */
1098         return hn_rndis_init(hv);
1099 }
1100
1101 void
1102 hn_rndis_detach(struct hn_data *hv)
1103 {
1104         /* Halt the RNDIS. */
1105         hn_rndis_halt(hv);
1106 }