1 /*- 2 * Copyright (c) 2009-2012,2016 Microsoft Corp. 3 * Copyright (c) 2010-2012 Citrix Inc. 4 * Copyright (c) 2012 NetApp Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * Network Virtualization Service. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "opt_inet6.h" 37 #include "opt_inet.h" 38 39 #include <sys/param.h> 40 #include <sys/kernel.h> 41 #include <sys/limits.h> 42 #include <sys/socket.h> 43 #include <sys/systm.h> 44 #include <sys/taskqueue.h> 45 46 #include <net/if.h> 47 #include <net/if_var.h> 48 #include <net/if_media.h> 49 50 #include <netinet/in.h> 51 #include <netinet/tcp_lro.h> 52 53 #include <dev/hyperv/include/hyperv.h> 54 #include <dev/hyperv/include/hyperv_busdma.h> 55 #include <dev/hyperv/include/vmbus.h> 56 #include <dev/hyperv/include/vmbus_xact.h> 57 58 #include <dev/hyperv/netvsc/ndis.h> 59 #include <dev/hyperv/netvsc/if_hnreg.h> 60 #include <dev/hyperv/netvsc/if_hnvar.h> 61 #include <dev/hyperv/netvsc/hn_nvs.h> 62 63 static int hn_nvs_conn_chim(struct hn_softc *); 64 static int hn_nvs_conn_rxbuf(struct hn_softc *); 65 static void hn_nvs_disconn_chim(struct hn_softc *); 66 static void hn_nvs_disconn_rxbuf(struct hn_softc *); 67 static int hn_nvs_conf_ndis(struct hn_softc *, int); 68 static int hn_nvs_init_ndis(struct hn_softc *); 69 static int hn_nvs_doinit(struct hn_softc *, uint32_t); 70 static int hn_nvs_init(struct hn_softc *); 71 static const void *hn_nvs_xact_execute(struct hn_softc *, 72 struct vmbus_xact *, void *, int, 73 size_t *, uint32_t); 74 static void hn_nvs_sent_none(struct hn_nvs_sendctx *, 75 struct hn_softc *, struct vmbus_channel *, 76 const void *, int); 77 78 struct hn_nvs_sendctx hn_nvs_sendctx_none = 79 HN_NVS_SENDCTX_INITIALIZER(hn_nvs_sent_none, NULL); 80 81 static const uint32_t hn_nvs_version[] = { 82 HN_NVS_VERSION_5, 83 HN_NVS_VERSION_4, 84 HN_NVS_VERSION_2, 85 HN_NVS_VERSION_1 86 }; 87 88 static const void * 89 hn_nvs_xact_execute(struct hn_softc *sc, struct vmbus_xact *xact, 90 void *req, int reqlen, size_t *resplen0, uint32_t type) 91 { 92 struct hn_nvs_sendctx sndc; 93 size_t resplen, min_resplen = *resplen0; 94 const struct hn_nvs_hdr *hdr; 95 int error; 96 97 KASSERT(min_resplen >= sizeof(*hdr), 98 ("invalid minimum response len %zu", min_resplen)); 99 100 /* 101 * Execute the xact setup by the caller. 102 */ 103 hn_nvs_sendctx_init(&sndc, hn_nvs_sent_xact, xact); 104 105 vmbus_xact_activate(xact); 106 error = hn_nvs_send(sc->hn_prichan, VMBUS_CHANPKT_FLAG_RC, 107 req, reqlen, &sndc); 108 if (error) { 109 vmbus_xact_deactivate(xact); 110 return (NULL); 111 } 112 hdr = vmbus_chan_xact_wait(sc->hn_prichan, xact, &resplen, 113 HN_CAN_SLEEP(sc)); 114 115 /* 116 * Check this NVS response message. 117 */ 118 if (resplen < min_resplen) { 119 if_printf(sc->hn_ifp, "invalid NVS resp len %zu\n", resplen); 120 return (NULL); 121 } 122 if (hdr->nvs_type != type) { 123 if_printf(sc->hn_ifp, "unexpected NVS resp 0x%08x, " 124 "expect 0x%08x\n", hdr->nvs_type, type); 125 return (NULL); 126 } 127 /* All pass! */ 128 *resplen0 = resplen; 129 return (hdr); 130 } 131 132 static __inline int 133 hn_nvs_req_send(struct hn_softc *sc, void *req, int reqlen) 134 { 135 136 return (hn_nvs_send(sc->hn_prichan, VMBUS_CHANPKT_FLAG_NONE, 137 req, reqlen, &hn_nvs_sendctx_none)); 138 } 139 140 static int 141 hn_nvs_conn_rxbuf(struct hn_softc *sc) 142 { 143 struct vmbus_xact *xact = NULL; 144 struct hn_nvs_rxbuf_conn *conn; 145 const struct hn_nvs_rxbuf_connresp *resp; 146 size_t resp_len; 147 uint32_t status; 148 int error, rxbuf_size; 149 150 /* 151 * Limit RXBUF size for old NVS. 152 */ 153 if (sc->hn_nvs_ver <= HN_NVS_VERSION_2) 154 rxbuf_size = HN_RXBUF_SIZE_COMPAT; 155 else 156 rxbuf_size = HN_RXBUF_SIZE; 157 158 /* 159 * Connect the RXBUF GPADL to the primary channel. 160 * 161 * NOTE: 162 * Only primary channel has RXBUF connected to it. Sub-channels 163 * just share this RXBUF. 164 */ 165 error = vmbus_chan_gpadl_connect(sc->hn_prichan, 166 sc->hn_rxbuf_dma.hv_paddr, rxbuf_size, &sc->hn_rxbuf_gpadl); 167 if (error) { 168 if_printf(sc->hn_ifp, "rxbuf gpadl conn failed: %d\n", 169 error); 170 goto cleanup; 171 } 172 173 /* 174 * Connect RXBUF to NVS. 175 */ 176 177 xact = vmbus_xact_get(sc->hn_xact, sizeof(*conn)); 178 if (xact == NULL) { 179 if_printf(sc->hn_ifp, "no xact for nvs rxbuf conn\n"); 180 error = ENXIO; 181 goto cleanup; 182 } 183 conn = vmbus_xact_req_data(xact); 184 conn->nvs_type = HN_NVS_TYPE_RXBUF_CONN; 185 conn->nvs_gpadl = sc->hn_rxbuf_gpadl; 186 conn->nvs_sig = HN_NVS_RXBUF_SIG; 187 188 resp_len = sizeof(*resp); 189 resp = hn_nvs_xact_execute(sc, xact, conn, sizeof(*conn), &resp_len, 190 HN_NVS_TYPE_RXBUF_CONNRESP); 191 if (resp == NULL) { 192 if_printf(sc->hn_ifp, "exec nvs rxbuf conn failed\n"); 193 error = EIO; 194 goto cleanup; 195 } 196 197 status = resp->nvs_status; 198 vmbus_xact_put(xact); 199 xact = NULL; 200 201 if (status != HN_NVS_STATUS_OK) { 202 if_printf(sc->hn_ifp, "nvs rxbuf conn failed: %x\n", status); 203 error = EIO; 204 goto cleanup; 205 } 206 sc->hn_flags |= HN_FLAG_RXBUF_CONNECTED; 207 208 return (0); 209 210 cleanup: 211 if (xact != NULL) 212 vmbus_xact_put(xact); 213 hn_nvs_disconn_rxbuf(sc); 214 return (error); 215 } 216 217 static int 218 hn_nvs_conn_chim(struct hn_softc *sc) 219 { 220 struct vmbus_xact *xact = NULL; 221 struct hn_nvs_chim_conn *chim; 222 const struct hn_nvs_chim_connresp *resp; 223 size_t resp_len; 224 uint32_t status, sectsz; 225 int error; 226 227 /* 228 * Connect chimney sending buffer GPADL to the primary channel. 229 * 230 * NOTE: 231 * Only primary channel has chimney sending buffer connected to it. 232 * Sub-channels just share this chimney sending buffer. 233 */ 234 error = vmbus_chan_gpadl_connect(sc->hn_prichan, 235 sc->hn_chim_dma.hv_paddr, HN_CHIM_SIZE, &sc->hn_chim_gpadl); 236 if (error) { 237 if_printf(sc->hn_ifp, "chim gpadl conn failed: %d\n", error); 238 goto cleanup; 239 } 240 241 /* 242 * Connect chimney sending buffer to NVS 243 */ 244 245 xact = vmbus_xact_get(sc->hn_xact, sizeof(*chim)); 246 if (xact == NULL) { 247 if_printf(sc->hn_ifp, "no xact for nvs chim conn\n"); 248 error = ENXIO; 249 goto cleanup; 250 } 251 chim = vmbus_xact_req_data(xact); 252 chim->nvs_type = HN_NVS_TYPE_CHIM_CONN; 253 chim->nvs_gpadl = sc->hn_chim_gpadl; 254 chim->nvs_sig = HN_NVS_CHIM_SIG; 255 256 resp_len = sizeof(*resp); 257 resp = hn_nvs_xact_execute(sc, xact, chim, sizeof(*chim), &resp_len, 258 HN_NVS_TYPE_CHIM_CONNRESP); 259 if (resp == NULL) { 260 if_printf(sc->hn_ifp, "exec nvs chim conn failed\n"); 261 error = EIO; 262 goto cleanup; 263 } 264 265 status = resp->nvs_status; 266 sectsz = resp->nvs_sectsz; 267 vmbus_xact_put(xact); 268 xact = NULL; 269 270 if (status != HN_NVS_STATUS_OK) { 271 if_printf(sc->hn_ifp, "nvs chim conn failed: %x\n", status); 272 error = EIO; 273 goto cleanup; 274 } 275 if (sectsz == 0) { 276 /* 277 * Can't use chimney sending buffer; done! 278 */ 279 if_printf(sc->hn_ifp, "zero chimney sending buffer " 280 "section size\n"); 281 sc->hn_chim_szmax = 0; 282 sc->hn_chim_cnt = 0; 283 sc->hn_flags |= HN_FLAG_CHIM_CONNECTED; 284 return (0); 285 } 286 287 sc->hn_chim_szmax = sectsz; 288 sc->hn_chim_cnt = HN_CHIM_SIZE / sc->hn_chim_szmax; 289 if (HN_CHIM_SIZE % sc->hn_chim_szmax != 0) { 290 if_printf(sc->hn_ifp, "chimney sending sections are " 291 "not properly aligned\n"); 292 } 293 if (sc->hn_chim_cnt % LONG_BIT != 0) { 294 if_printf(sc->hn_ifp, "discard %d chimney sending sections\n", 295 sc->hn_chim_cnt % LONG_BIT); 296 } 297 298 sc->hn_chim_bmap_cnt = sc->hn_chim_cnt / LONG_BIT; 299 sc->hn_chim_bmap = malloc(sc->hn_chim_bmap_cnt * sizeof(u_long), 300 M_DEVBUF, M_WAITOK | M_ZERO); 301 302 /* Done! */ 303 sc->hn_flags |= HN_FLAG_CHIM_CONNECTED; 304 if (bootverbose) { 305 if_printf(sc->hn_ifp, "chimney sending buffer %d/%d\n", 306 sc->hn_chim_szmax, sc->hn_chim_cnt); 307 } 308 return (0); 309 310 cleanup: 311 if (xact != NULL) 312 vmbus_xact_put(xact); 313 hn_nvs_disconn_chim(sc); 314 return (error); 315 } 316 317 static void 318 hn_nvs_disconn_rxbuf(struct hn_softc *sc) 319 { 320 int error; 321 322 if (sc->hn_flags & HN_FLAG_RXBUF_CONNECTED) { 323 struct hn_nvs_rxbuf_disconn disconn; 324 325 /* 326 * Disconnect RXBUF from NVS. 327 */ 328 memset(&disconn, 0, sizeof(disconn)); 329 disconn.nvs_type = HN_NVS_TYPE_RXBUF_DISCONN; 330 disconn.nvs_sig = HN_NVS_RXBUF_SIG; 331 332 /* NOTE: No response. */ 333 error = hn_nvs_req_send(sc, &disconn, sizeof(disconn)); 334 if (error) { 335 if_printf(sc->hn_ifp, 336 "send nvs rxbuf disconn failed: %d\n", error); 337 /* 338 * Fine for a revoked channel, since the hypervisor 339 * does not drain TX bufring for a revoked channel. 340 */ 341 if (!vmbus_chan_is_revoked(sc->hn_prichan)) 342 sc->hn_flags |= HN_FLAG_RXBUF_REF; 343 } 344 sc->hn_flags &= ~HN_FLAG_RXBUF_CONNECTED; 345 346 /* 347 * Wait for the hypervisor to receive this NVS request. 348 * 349 * NOTE: 350 * The TX bufring will not be drained by the hypervisor, 351 * if the primary channel is revoked. 352 */ 353 while (!vmbus_chan_tx_empty(sc->hn_prichan) && 354 !vmbus_chan_is_revoked(sc->hn_prichan)) 355 pause("waittx", 1); 356 /* 357 * Linger long enough for NVS to disconnect RXBUF. 358 */ 359 pause("lingtx", (200 * hz) / 1000); 360 } 361 362 if (sc->hn_rxbuf_gpadl != 0) { 363 /* 364 * Disconnect RXBUF from primary channel. 365 */ 366 error = vmbus_chan_gpadl_disconnect(sc->hn_prichan, 367 sc->hn_rxbuf_gpadl); 368 if (error) { 369 if_printf(sc->hn_ifp, 370 "rxbuf gpadl disconn failed: %d\n", error); 371 sc->hn_flags |= HN_FLAG_RXBUF_REF; 372 } 373 sc->hn_rxbuf_gpadl = 0; 374 } 375 } 376 377 static void 378 hn_nvs_disconn_chim(struct hn_softc *sc) 379 { 380 int error; 381 382 if (sc->hn_flags & HN_FLAG_CHIM_CONNECTED) { 383 struct hn_nvs_chim_disconn disconn; 384 385 /* 386 * Disconnect chimney sending buffer from NVS. 387 */ 388 memset(&disconn, 0, sizeof(disconn)); 389 disconn.nvs_type = HN_NVS_TYPE_CHIM_DISCONN; 390 disconn.nvs_sig = HN_NVS_CHIM_SIG; 391 392 /* NOTE: No response. */ 393 error = hn_nvs_req_send(sc, &disconn, sizeof(disconn)); 394 if (error) { 395 if_printf(sc->hn_ifp, 396 "send nvs chim disconn failed: %d\n", error); 397 /* 398 * Fine for a revoked channel, since the hypervisor 399 * does not drain TX bufring for a revoked channel. 400 */ 401 if (!vmbus_chan_is_revoked(sc->hn_prichan)) 402 sc->hn_flags |= HN_FLAG_CHIM_REF; 403 } 404 sc->hn_flags &= ~HN_FLAG_CHIM_CONNECTED; 405 406 /* 407 * Wait for the hypervisor to receive this NVS request. 408 * 409 * NOTE: 410 * The TX bufring will not be drained by the hypervisor, 411 * if the primary channel is revoked. 412 */ 413 while (!vmbus_chan_tx_empty(sc->hn_prichan) && 414 !vmbus_chan_is_revoked(sc->hn_prichan)) 415 pause("waittx", 1); 416 /* 417 * Linger long enough for NVS to disconnect chimney 418 * sending buffer. 419 */ 420 pause("lingtx", (200 * hz) / 1000); 421 } 422 423 if (sc->hn_chim_gpadl != 0) { 424 /* 425 * Disconnect chimney sending buffer from primary channel. 426 */ 427 error = vmbus_chan_gpadl_disconnect(sc->hn_prichan, 428 sc->hn_chim_gpadl); 429 if (error) { 430 if_printf(sc->hn_ifp, 431 "chim gpadl disconn failed: %d\n", error); 432 sc->hn_flags |= HN_FLAG_CHIM_REF; 433 } 434 sc->hn_chim_gpadl = 0; 435 } 436 437 if (sc->hn_chim_bmap != NULL) { 438 free(sc->hn_chim_bmap, M_DEVBUF); 439 sc->hn_chim_bmap = NULL; 440 sc->hn_chim_bmap_cnt = 0; 441 } 442 } 443 444 static int 445 hn_nvs_doinit(struct hn_softc *sc, uint32_t nvs_ver) 446 { 447 struct vmbus_xact *xact; 448 struct hn_nvs_init *init; 449 const struct hn_nvs_init_resp *resp; 450 size_t resp_len; 451 uint32_t status; 452 453 xact = vmbus_xact_get(sc->hn_xact, sizeof(*init)); 454 if (xact == NULL) { 455 if_printf(sc->hn_ifp, "no xact for nvs init\n"); 456 return (ENXIO); 457 } 458 init = vmbus_xact_req_data(xact); 459 init->nvs_type = HN_NVS_TYPE_INIT; 460 init->nvs_ver_min = nvs_ver; 461 init->nvs_ver_max = nvs_ver; 462 463 resp_len = sizeof(*resp); 464 resp = hn_nvs_xact_execute(sc, xact, init, sizeof(*init), &resp_len, 465 HN_NVS_TYPE_INIT_RESP); 466 if (resp == NULL) { 467 if_printf(sc->hn_ifp, "exec init failed\n"); 468 vmbus_xact_put(xact); 469 return (EIO); 470 } 471 472 status = resp->nvs_status; 473 vmbus_xact_put(xact); 474 475 if (status != HN_NVS_STATUS_OK) { 476 if (bootverbose) { 477 /* 478 * Caller may try another NVS version, and will log 479 * error if there are no more NVS versions to try, 480 * so don't bark out loud here. 481 */ 482 if_printf(sc->hn_ifp, "nvs init failed for ver 0x%x\n", 483 nvs_ver); 484 } 485 return (EINVAL); 486 } 487 return (0); 488 } 489 490 /* 491 * Configure MTU and enable VLAN. 492 */ 493 static int 494 hn_nvs_conf_ndis(struct hn_softc *sc, int mtu) 495 { 496 struct hn_nvs_ndis_conf conf; 497 int error; 498 499 memset(&conf, 0, sizeof(conf)); 500 conf.nvs_type = HN_NVS_TYPE_NDIS_CONF; 501 conf.nvs_mtu = mtu; 502 conf.nvs_caps = HN_NVS_NDIS_CONF_VLAN; 503 504 /* NOTE: No response. */ 505 error = hn_nvs_req_send(sc, &conf, sizeof(conf)); 506 if (error) { 507 if_printf(sc->hn_ifp, "send nvs ndis conf failed: %d\n", error); 508 return (error); 509 } 510 511 if (bootverbose) 512 if_printf(sc->hn_ifp, "nvs ndis conf done\n"); 513 sc->hn_caps |= HN_CAP_MTU | HN_CAP_VLAN; 514 return (0); 515 } 516 517 static int 518 hn_nvs_init_ndis(struct hn_softc *sc) 519 { 520 struct hn_nvs_ndis_init ndis; 521 int error; 522 523 memset(&ndis, 0, sizeof(ndis)); 524 ndis.nvs_type = HN_NVS_TYPE_NDIS_INIT; 525 ndis.nvs_ndis_major = HN_NDIS_VERSION_MAJOR(sc->hn_ndis_ver); 526 ndis.nvs_ndis_minor = HN_NDIS_VERSION_MINOR(sc->hn_ndis_ver); 527 528 /* NOTE: No response. */ 529 error = hn_nvs_req_send(sc, &ndis, sizeof(ndis)); 530 if (error) 531 if_printf(sc->hn_ifp, "send nvs ndis init failed: %d\n", error); 532 return (error); 533 } 534 535 static int 536 hn_nvs_init(struct hn_softc *sc) 537 { 538 int i, error; 539 540 if (device_is_attached(sc->hn_dev)) { 541 /* 542 * NVS version and NDIS version MUST NOT be changed. 543 */ 544 if (bootverbose) { 545 if_printf(sc->hn_ifp, "reinit NVS version 0x%x, " 546 "NDIS version %u.%u\n", sc->hn_nvs_ver, 547 HN_NDIS_VERSION_MAJOR(sc->hn_ndis_ver), 548 HN_NDIS_VERSION_MINOR(sc->hn_ndis_ver)); 549 } 550 551 error = hn_nvs_doinit(sc, sc->hn_nvs_ver); 552 if (error) { 553 if_printf(sc->hn_ifp, "reinit NVS version 0x%x " 554 "failed: %d\n", sc->hn_nvs_ver, error); 555 return (error); 556 } 557 goto done; 558 } 559 560 /* 561 * Find the supported NVS version and set NDIS version accordingly. 562 */ 563 for (i = 0; i < nitems(hn_nvs_version); ++i) { 564 error = hn_nvs_doinit(sc, hn_nvs_version[i]); 565 if (!error) { 566 sc->hn_nvs_ver = hn_nvs_version[i]; 567 568 /* Set NDIS version according to NVS version. */ 569 sc->hn_ndis_ver = HN_NDIS_VERSION_6_30; 570 if (sc->hn_nvs_ver <= HN_NVS_VERSION_4) 571 sc->hn_ndis_ver = HN_NDIS_VERSION_6_1; 572 573 if (bootverbose) { 574 if_printf(sc->hn_ifp, "NVS version 0x%x, " 575 "NDIS version %u.%u\n", sc->hn_nvs_ver, 576 HN_NDIS_VERSION_MAJOR(sc->hn_ndis_ver), 577 HN_NDIS_VERSION_MINOR(sc->hn_ndis_ver)); 578 } 579 goto done; 580 } 581 } 582 if_printf(sc->hn_ifp, "no NVS available\n"); 583 return (ENXIO); 584 585 done: 586 if (sc->hn_nvs_ver >= HN_NVS_VERSION_5) 587 sc->hn_caps |= HN_CAP_HASHVAL; 588 return (0); 589 } 590 591 int 592 hn_nvs_attach(struct hn_softc *sc, int mtu) 593 { 594 int error; 595 596 /* 597 * Initialize NVS. 598 */ 599 error = hn_nvs_init(sc); 600 if (error) 601 return (error); 602 603 if (sc->hn_nvs_ver >= HN_NVS_VERSION_2) { 604 /* 605 * Configure NDIS before initializing it. 606 */ 607 error = hn_nvs_conf_ndis(sc, mtu); 608 if (error) 609 return (error); 610 } 611 612 /* 613 * Initialize NDIS. 614 */ 615 error = hn_nvs_init_ndis(sc); 616 if (error) 617 return (error); 618 619 /* 620 * Connect RXBUF. 621 */ 622 error = hn_nvs_conn_rxbuf(sc); 623 if (error) 624 return (error); 625 626 /* 627 * Connect chimney sending buffer. 628 */ 629 error = hn_nvs_conn_chim(sc); 630 if (error) { 631 hn_nvs_disconn_rxbuf(sc); 632 return (error); 633 } 634 return (0); 635 } 636 637 void 638 hn_nvs_detach(struct hn_softc *sc) 639 { 640 641 /* NOTE: there are no requests to stop the NVS. */ 642 hn_nvs_disconn_rxbuf(sc); 643 hn_nvs_disconn_chim(sc); 644 } 645 646 void 647 hn_nvs_sent_xact(struct hn_nvs_sendctx *sndc, 648 struct hn_softc *sc __unused, struct vmbus_channel *chan __unused, 649 const void *data, int dlen) 650 { 651 652 vmbus_xact_wakeup(sndc->hn_cbarg, data, dlen); 653 } 654 655 static void 656 hn_nvs_sent_none(struct hn_nvs_sendctx *sndc __unused, 657 struct hn_softc *sc __unused, struct vmbus_channel *chan __unused, 658 const void *data __unused, int dlen __unused) 659 { 660 /* EMPTY */ 661 } 662 663 int 664 hn_nvs_alloc_subchans(struct hn_softc *sc, int *nsubch0) 665 { 666 struct vmbus_xact *xact; 667 struct hn_nvs_subch_req *req; 668 const struct hn_nvs_subch_resp *resp; 669 int error, nsubch_req; 670 uint32_t nsubch; 671 size_t resp_len; 672 673 nsubch_req = *nsubch0; 674 KASSERT(nsubch_req > 0, ("invalid # of sub-channels %d", nsubch_req)); 675 676 xact = vmbus_xact_get(sc->hn_xact, sizeof(*req)); 677 if (xact == NULL) { 678 if_printf(sc->hn_ifp, "no xact for nvs subch alloc\n"); 679 return (ENXIO); 680 } 681 req = vmbus_xact_req_data(xact); 682 req->nvs_type = HN_NVS_TYPE_SUBCH_REQ; 683 req->nvs_op = HN_NVS_SUBCH_OP_ALLOC; 684 req->nvs_nsubch = nsubch_req; 685 686 resp_len = sizeof(*resp); 687 resp = hn_nvs_xact_execute(sc, xact, req, sizeof(*req), &resp_len, 688 HN_NVS_TYPE_SUBCH_RESP); 689 if (resp == NULL) { 690 if_printf(sc->hn_ifp, "exec nvs subch alloc failed\n"); 691 error = EIO; 692 goto done; 693 } 694 if (resp->nvs_status != HN_NVS_STATUS_OK) { 695 if_printf(sc->hn_ifp, "nvs subch alloc failed: %x\n", 696 resp->nvs_status); 697 error = EIO; 698 goto done; 699 } 700 701 nsubch = resp->nvs_nsubch; 702 if (nsubch > nsubch_req) { 703 if_printf(sc->hn_ifp, "%u subchans are allocated, " 704 "requested %d\n", nsubch, nsubch_req); 705 nsubch = nsubch_req; 706 } 707 *nsubch0 = nsubch; 708 error = 0; 709 done: 710 vmbus_xact_put(xact); 711 return (error); 712 } 713 714 int 715 hn_nvs_send_rndis_ctrl(struct vmbus_channel *chan, 716 struct hn_nvs_sendctx *sndc, struct vmbus_gpa *gpa, int gpa_cnt) 717 { 718 719 return hn_nvs_send_rndis_sglist(chan, HN_NVS_RNDIS_MTYPE_CTRL, 720 sndc, gpa, gpa_cnt); 721 } 722