1/*- 2 * Copyright (c) 2009-2012 Microsoft Corp. 3 * Copyright (c) 2012 NetApp Inc. 4 * Copyright (c) 2012 Citrix 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#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: releng/10.2/sys/dev/hyperv/vmbus/hv_channel.c 283280 2015-05-22 09:03:55Z whu $"); 31 32#include <sys/param.h> 33#include <sys/malloc.h> 34#include <sys/systm.h> 35#include <sys/mbuf.h> 36#include <sys/lock.h> 37#include <sys/mutex.h> 38#include <machine/bus.h> 39#include <vm/vm.h> 40#include <vm/vm_param.h> 41#include <vm/pmap.h> 42 43#include "hv_vmbus_priv.h" 44 45static int vmbus_channel_create_gpadl_header( 46 /* must be phys and virt contiguous*/ 47 void* contig_buffer, 48 /* page-size multiple */ 49 uint32_t size, 50 hv_vmbus_channel_msg_info** msg_info, 51 uint32_t* message_count); 52 53static void vmbus_channel_set_event(hv_vmbus_channel* channel); 54 55/** 56 * @brief Trigger an event notification on the specified channel 57 */ 58static void 59vmbus_channel_set_event(hv_vmbus_channel *channel) 60{ 61 hv_vmbus_monitor_page *monitor_page; 62 63 if (channel->offer_msg.monitor_allocated) { 64 /* Each uint32_t represents 32 channels */ 65 synch_set_bit((channel->offer_msg.child_rel_id & 31), 66 ((uint32_t *)hv_vmbus_g_connection.send_interrupt_page 67 + ((channel->offer_msg.child_rel_id >> 5)))); 68 69 monitor_page = (hv_vmbus_monitor_page *) 70 hv_vmbus_g_connection.monitor_pages; 71 72 monitor_page++; /* Get the child to parent monitor page */ 73 74 synch_set_bit(channel->monitor_bit, 75 (uint32_t *)&monitor_page-> 76 trigger_group[channel->monitor_group].u.pending); 77 } else { 78 hv_vmbus_set_event(channel); 79 } 80 81} 82 83/** 84 * @brief Open the specified channel 85 */ 86int 87hv_vmbus_channel_open( 88 hv_vmbus_channel* new_channel, 89 uint32_t send_ring_buffer_size, 90 uint32_t recv_ring_buffer_size, 91 void* user_data, 92 uint32_t user_data_len, 93 hv_vmbus_pfn_channel_callback pfn_on_channel_callback, 94 void* context) 95{ 96 97 int ret = 0; 98 void *in, *out; 99 hv_vmbus_channel_open_channel* open_msg; 100 hv_vmbus_channel_msg_info* open_info; 101 102 mtx_lock(&new_channel->sc_lock); 103 if (new_channel->state == HV_CHANNEL_OPEN_STATE) { 104 new_channel->state = HV_CHANNEL_OPENING_STATE; 105 } else { 106 mtx_unlock(&new_channel->sc_lock); 107 if(bootverbose) 108 printf("VMBUS: Trying to open channel <%p> which in " 109 "%d state.\n", new_channel, new_channel->state); 110 return (EINVAL); 111 } 112 mtx_unlock(&new_channel->sc_lock); 113 114 new_channel->on_channel_callback = pfn_on_channel_callback; 115 new_channel->channel_callback_context = context; 116 117 /* Allocate the ring buffer */ 118 out = contigmalloc((send_ring_buffer_size + recv_ring_buffer_size), 119 M_DEVBUF, M_ZERO, 0UL, BUS_SPACE_MAXADDR, PAGE_SIZE, 0); 120 KASSERT(out != NULL, 121 ("Error VMBUS: contigmalloc failed to allocate Ring Buffer!")); 122 if (out == NULL) 123 return (ENOMEM); 124 125 in = ((uint8_t *) out + send_ring_buffer_size); 126 127 new_channel->ring_buffer_pages = out; 128 new_channel->ring_buffer_page_count = (send_ring_buffer_size + 129 recv_ring_buffer_size) >> PAGE_SHIFT; 130 new_channel->ring_buffer_size = send_ring_buffer_size + 131 recv_ring_buffer_size; 132 133 hv_vmbus_ring_buffer_init( 134 &new_channel->outbound, 135 out, 136 send_ring_buffer_size); 137 138 hv_vmbus_ring_buffer_init( 139 &new_channel->inbound, 140 in, 141 recv_ring_buffer_size); 142 143 /** 144 * Establish the gpadl for the ring buffer 145 */ 146 new_channel->ring_buffer_gpadl_handle = 0; 147 148 ret = hv_vmbus_channel_establish_gpadl(new_channel, 149 new_channel->outbound.ring_buffer, 150 send_ring_buffer_size + recv_ring_buffer_size, 151 &new_channel->ring_buffer_gpadl_handle); 152 153 /** 154 * Create and init the channel open message 155 */ 156 open_info = (hv_vmbus_channel_msg_info*) malloc( 157 sizeof(hv_vmbus_channel_msg_info) + 158 sizeof(hv_vmbus_channel_open_channel), 159 M_DEVBUF, 160 M_NOWAIT); 161 KASSERT(open_info != NULL, 162 ("Error VMBUS: malloc failed to allocate Open Channel message!")); 163 164 if (open_info == NULL) 165 return (ENOMEM); 166 167 sema_init(&open_info->wait_sema, 0, "Open Info Sema"); 168 169 open_msg = (hv_vmbus_channel_open_channel*) open_info->msg; 170 open_msg->header.message_type = HV_CHANNEL_MESSAGE_OPEN_CHANNEL; 171 open_msg->open_id = new_channel->offer_msg.child_rel_id; 172 open_msg->child_rel_id = new_channel->offer_msg.child_rel_id; 173 open_msg->ring_buffer_gpadl_handle = 174 new_channel->ring_buffer_gpadl_handle; 175 open_msg->downstream_ring_buffer_page_offset = send_ring_buffer_size 176 >> PAGE_SHIFT; 177 open_msg->target_vcpu = new_channel->target_vcpu; 178 179 if (user_data_len) 180 memcpy(open_msg->user_data, user_data, user_data_len); 181 182 mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 183 TAILQ_INSERT_TAIL( 184 &hv_vmbus_g_connection.channel_msg_anchor, 185 open_info, 186 msg_list_entry); 187 mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 188 189 ret = hv_vmbus_post_message( 190 open_msg, sizeof(hv_vmbus_channel_open_channel)); 191 192 if (ret != 0) 193 goto cleanup; 194 195 ret = sema_timedwait(&open_info->wait_sema, 500); /* KYS 5 seconds */ 196 197 if (ret) { 198 if(bootverbose) 199 printf("VMBUS: channel <%p> open timeout.\n", new_channel); 200 goto cleanup; 201 } 202 203 if (open_info->response.open_result.status == 0) { 204 new_channel->state = HV_CHANNEL_OPENED_STATE; 205 if(bootverbose) 206 printf("VMBUS: channel <%p> open success.\n", new_channel); 207 } else { 208 if(bootverbose) 209 printf("Error VMBUS: channel <%p> open failed - %d!\n", 210 new_channel, open_info->response.open_result.status); 211 } 212 213 cleanup: 214 mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 215 TAILQ_REMOVE( 216 &hv_vmbus_g_connection.channel_msg_anchor, 217 open_info, 218 msg_list_entry); 219 mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 220 sema_destroy(&open_info->wait_sema); 221 free(open_info, M_DEVBUF); 222 223 return (ret); 224} 225 226/** 227 * @brief Create a gpadl for the specified buffer 228 */ 229static int 230vmbus_channel_create_gpadl_header( 231 void* contig_buffer, 232 uint32_t size, /* page-size multiple */ 233 hv_vmbus_channel_msg_info** msg_info, 234 uint32_t* message_count) 235{ 236 int i; 237 int page_count; 238 unsigned long long pfn; 239 uint32_t msg_size; 240 hv_vmbus_channel_gpadl_header* gpa_header; 241 hv_vmbus_channel_gpadl_body* gpadl_body; 242 hv_vmbus_channel_msg_info* msg_header; 243 hv_vmbus_channel_msg_info* msg_body; 244 245 int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; 246 247 page_count = size >> PAGE_SHIFT; 248 pfn = hv_get_phys_addr(contig_buffer) >> PAGE_SHIFT; 249 250 /*do we need a gpadl body msg */ 251 pfnSize = HV_MAX_SIZE_CHANNEL_MESSAGE 252 - sizeof(hv_vmbus_channel_gpadl_header) 253 - sizeof(hv_gpa_range); 254 pfnCount = pfnSize / sizeof(uint64_t); 255 256 if (page_count > pfnCount) { /* if(we need a gpadl body) */ 257 /* fill in the header */ 258 msg_size = sizeof(hv_vmbus_channel_msg_info) 259 + sizeof(hv_vmbus_channel_gpadl_header) 260 + sizeof(hv_gpa_range) 261 + pfnCount * sizeof(uint64_t); 262 msg_header = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 263 KASSERT( 264 msg_header != NULL, 265 ("Error VMBUS: malloc failed to allocate Gpadl Message!")); 266 if (msg_header == NULL) 267 return (ENOMEM); 268 269 TAILQ_INIT(&msg_header->sub_msg_list_anchor); 270 msg_header->message_size = msg_size; 271 272 gpa_header = (hv_vmbus_channel_gpadl_header*) msg_header->msg; 273 gpa_header->range_count = 1; 274 gpa_header->range_buf_len = sizeof(hv_gpa_range) 275 + page_count * sizeof(uint64_t); 276 gpa_header->range[0].byte_offset = 0; 277 gpa_header->range[0].byte_count = size; 278 for (i = 0; i < pfnCount; i++) { 279 gpa_header->range[0].pfn_array[i] = pfn + i; 280 } 281 *msg_info = msg_header; 282 *message_count = 1; 283 284 pfnSum = pfnCount; 285 pfnLeft = page_count - pfnCount; 286 287 /* 288 * figure out how many pfns we can fit 289 */ 290 pfnSize = HV_MAX_SIZE_CHANNEL_MESSAGE 291 - sizeof(hv_vmbus_channel_gpadl_body); 292 pfnCount = pfnSize / sizeof(uint64_t); 293 294 /* 295 * fill in the body 296 */ 297 while (pfnLeft) { 298 if (pfnLeft > pfnCount) { 299 pfnCurr = pfnCount; 300 } else { 301 pfnCurr = pfnLeft; 302 } 303 304 msg_size = sizeof(hv_vmbus_channel_msg_info) + 305 sizeof(hv_vmbus_channel_gpadl_body) + 306 pfnCurr * sizeof(uint64_t); 307 msg_body = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 308 KASSERT( 309 msg_body != NULL, 310 ("Error VMBUS: malloc failed to allocate Gpadl msg_body!")); 311 if (msg_body == NULL) 312 return (ENOMEM); 313 314 msg_body->message_size = msg_size; 315 (*message_count)++; 316 gpadl_body = 317 (hv_vmbus_channel_gpadl_body*) msg_body->msg; 318 /* 319 * gpadl_body->gpadl = kbuffer; 320 */ 321 for (i = 0; i < pfnCurr; i++) { 322 gpadl_body->pfn[i] = pfn + pfnSum + i; 323 } 324 325 TAILQ_INSERT_TAIL( 326 &msg_header->sub_msg_list_anchor, 327 msg_body, 328 msg_list_entry); 329 pfnSum += pfnCurr; 330 pfnLeft -= pfnCurr; 331 } 332 } else { /* else everything fits in a header */ 333 334 msg_size = sizeof(hv_vmbus_channel_msg_info) + 335 sizeof(hv_vmbus_channel_gpadl_header) + 336 sizeof(hv_gpa_range) + 337 page_count * sizeof(uint64_t); 338 msg_header = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 339 KASSERT( 340 msg_header != NULL, 341 ("Error VMBUS: malloc failed to allocate Gpadl Message!")); 342 if (msg_header == NULL) 343 return (ENOMEM); 344 345 msg_header->message_size = msg_size; 346 347 gpa_header = (hv_vmbus_channel_gpadl_header*) msg_header->msg; 348 gpa_header->range_count = 1; 349 gpa_header->range_buf_len = sizeof(hv_gpa_range) + 350 page_count * sizeof(uint64_t); 351 gpa_header->range[0].byte_offset = 0; 352 gpa_header->range[0].byte_count = size; 353 for (i = 0; i < page_count; i++) { 354 gpa_header->range[0].pfn_array[i] = pfn + i; 355 } 356 357 *msg_info = msg_header; 358 *message_count = 1; 359 } 360 361 return (0); 362} 363 364/** 365 * @brief Establish a GPADL for the specified buffer 366 */ 367int 368hv_vmbus_channel_establish_gpadl( 369 hv_vmbus_channel* channel, 370 void* contig_buffer, 371 uint32_t size, /* page-size multiple */ 372 uint32_t* gpadl_handle) 373 374{ 375 int ret = 0; 376 hv_vmbus_channel_gpadl_header* gpadl_msg; 377 hv_vmbus_channel_gpadl_body* gpadl_body; 378 hv_vmbus_channel_msg_info* msg_info; 379 hv_vmbus_channel_msg_info* sub_msg_info; 380 uint32_t msg_count; 381 hv_vmbus_channel_msg_info* curr; 382 uint32_t next_gpadl_handle; 383 384 next_gpadl_handle = hv_vmbus_g_connection.next_gpadl_handle; 385 atomic_add_int((int*) &hv_vmbus_g_connection.next_gpadl_handle, 1); 386 387 ret = vmbus_channel_create_gpadl_header( 388 contig_buffer, size, &msg_info, &msg_count); 389 390 if(ret != 0) { /* if(allocation failed) return immediately */ 391 /* reverse atomic_add_int above */ 392 atomic_subtract_int((int*) 393 &hv_vmbus_g_connection.next_gpadl_handle, 1); 394 return ret; 395 } 396 397 sema_init(&msg_info->wait_sema, 0, "Open Info Sema"); 398 gpadl_msg = (hv_vmbus_channel_gpadl_header*) msg_info->msg; 399 gpadl_msg->header.message_type = HV_CHANNEL_MESSAGEL_GPADL_HEADER; 400 gpadl_msg->child_rel_id = channel->offer_msg.child_rel_id; 401 gpadl_msg->gpadl = next_gpadl_handle; 402 403 mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 404 TAILQ_INSERT_TAIL( 405 &hv_vmbus_g_connection.channel_msg_anchor, 406 msg_info, 407 msg_list_entry); 408 409 mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 410 411 ret = hv_vmbus_post_message( 412 gpadl_msg, 413 msg_info->message_size - 414 (uint32_t) sizeof(hv_vmbus_channel_msg_info)); 415 416 if (ret != 0) 417 goto cleanup; 418 419 if (msg_count > 1) { 420 TAILQ_FOREACH(curr, 421 &msg_info->sub_msg_list_anchor, msg_list_entry) { 422 sub_msg_info = curr; 423 gpadl_body = 424 (hv_vmbus_channel_gpadl_body*) sub_msg_info->msg; 425 426 gpadl_body->header.message_type = 427 HV_CHANNEL_MESSAGE_GPADL_BODY; 428 gpadl_body->gpadl = next_gpadl_handle; 429 430 ret = hv_vmbus_post_message( 431 gpadl_body, 432 sub_msg_info->message_size 433 - (uint32_t) sizeof(hv_vmbus_channel_msg_info)); 434 /* if (the post message failed) give up and clean up */ 435 if(ret != 0) 436 goto cleanup; 437 } 438 } 439 440 ret = sema_timedwait(&msg_info->wait_sema, 500); /* KYS 5 seconds*/ 441 if (ret != 0) 442 goto cleanup; 443 444 *gpadl_handle = gpadl_msg->gpadl; 445 446cleanup: 447 448 mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 449 TAILQ_REMOVE(&hv_vmbus_g_connection.channel_msg_anchor, 450 msg_info, msg_list_entry); 451 mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 452 453 sema_destroy(&msg_info->wait_sema); 454 free(msg_info, M_DEVBUF); 455 456 return (ret); 457} 458 459/** 460 * @brief Teardown the specified GPADL handle 461 */ 462int 463hv_vmbus_channel_teardown_gpdal( 464 hv_vmbus_channel* channel, 465 uint32_t gpadl_handle) 466{ 467 int ret = 0; 468 hv_vmbus_channel_gpadl_teardown* msg; 469 hv_vmbus_channel_msg_info* info; 470 471 info = (hv_vmbus_channel_msg_info *) 472 malloc( sizeof(hv_vmbus_channel_msg_info) + 473 sizeof(hv_vmbus_channel_gpadl_teardown), 474 M_DEVBUF, M_NOWAIT); 475 KASSERT(info != NULL, 476 ("Error VMBUS: malloc failed to allocate Gpadl Teardown Msg!")); 477 if (info == NULL) { 478 ret = ENOMEM; 479 goto cleanup; 480 } 481 482 sema_init(&info->wait_sema, 0, "Open Info Sema"); 483 484 msg = (hv_vmbus_channel_gpadl_teardown*) info->msg; 485 486 msg->header.message_type = HV_CHANNEL_MESSAGE_GPADL_TEARDOWN; 487 msg->child_rel_id = channel->offer_msg.child_rel_id; 488 msg->gpadl = gpadl_handle; 489 490 mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 491 TAILQ_INSERT_TAIL(&hv_vmbus_g_connection.channel_msg_anchor, 492 info, msg_list_entry); 493 mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 494 495 ret = hv_vmbus_post_message(msg, 496 sizeof(hv_vmbus_channel_gpadl_teardown)); 497 if (ret != 0) 498 goto cleanup; 499 500 ret = sema_timedwait(&info->wait_sema, 500); /* KYS 5 seconds */ 501 502cleanup: 503 /* 504 * Received a torndown response 505 */ 506 mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 507 TAILQ_REMOVE(&hv_vmbus_g_connection.channel_msg_anchor, 508 info, msg_list_entry); 509 mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 510 sema_destroy(&info->wait_sema); 511 free(info, M_DEVBUF); 512 513 return (ret); 514} 515 516static void 517hv_vmbus_channel_close_internal(hv_vmbus_channel *channel) 518{ 519 int ret = 0; 520 hv_vmbus_channel_close_channel* msg; 521 hv_vmbus_channel_msg_info* info; 522 523 channel->state = HV_CHANNEL_OPEN_STATE; 524 channel->sc_creation_callback = NULL; 525 526 /* 527 * Grab the lock to prevent race condition when a packet received 528 * and unloading driver is in the process. 529 */ 530 mtx_lock(&channel->inbound_lock); 531 channel->on_channel_callback = NULL; 532 mtx_unlock(&channel->inbound_lock); 533 534 /** 535 * Send a closing message 536 */ 537 info = (hv_vmbus_channel_msg_info *) 538 malloc( sizeof(hv_vmbus_channel_msg_info) + 539 sizeof(hv_vmbus_channel_close_channel), 540 M_DEVBUF, M_NOWAIT); 541 KASSERT(info != NULL, ("VMBUS: malloc failed hv_vmbus_channel_close!")); 542 if(info == NULL) 543 return; 544 545 msg = (hv_vmbus_channel_close_channel*) info->msg; 546 msg->header.message_type = HV_CHANNEL_MESSAGE_CLOSE_CHANNEL; 547 msg->child_rel_id = channel->offer_msg.child_rel_id; 548 549 ret = hv_vmbus_post_message( 550 msg, sizeof(hv_vmbus_channel_close_channel)); 551 552 /* Tear down the gpadl for the channel's ring buffer */ 553 if (channel->ring_buffer_gpadl_handle) { 554 hv_vmbus_channel_teardown_gpdal(channel, 555 channel->ring_buffer_gpadl_handle); 556 } 557 558 /* TODO: Send a msg to release the childRelId */ 559 560 /* cleanup the ring buffers for this channel */ 561 hv_ring_buffer_cleanup(&channel->outbound); 562 hv_ring_buffer_cleanup(&channel->inbound); 563 564 contigfree(channel->ring_buffer_pages, channel->ring_buffer_size, 565 M_DEVBUF); 566 567 free(info, M_DEVBUF); 568} 569 570/** 571 * @brief Close the specified channel 572 */ 573void 574hv_vmbus_channel_close(hv_vmbus_channel *channel) 575{ 576 hv_vmbus_channel* sub_channel; 577 578 if (channel->primary_channel != NULL) { 579 /* 580 * We only close multi-channels when the primary is 581 * closed. 582 */ 583 return; 584 } 585 586 /* 587 * Close all multi-channels first. 588 */ 589 TAILQ_FOREACH(sub_channel, &channel->sc_list_anchor, 590 sc_list_entry) { 591 if (sub_channel->state != HV_CHANNEL_OPENED_STATE) 592 continue; 593 hv_vmbus_channel_close_internal(sub_channel); 594 } 595 /* 596 * Then close the primary channel. 597 */ 598 hv_vmbus_channel_close_internal(channel); 599} 600 601/** 602 * @brief Send the specified buffer on the given channel 603 */ 604int 605hv_vmbus_channel_send_packet( 606 hv_vmbus_channel* channel, 607 void* buffer, 608 uint32_t buffer_len, 609 uint64_t request_id, 610 hv_vmbus_packet_type type, 611 uint32_t flags) 612{ 613 int ret = 0; 614 hv_vm_packet_descriptor desc; 615 uint32_t packet_len; 616 uint64_t aligned_data; 617 uint32_t packet_len_aligned; 618 boolean_t need_sig; 619 hv_vmbus_sg_buffer_list buffer_list[3]; 620 621 packet_len = sizeof(hv_vm_packet_descriptor) + buffer_len; 622 packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 623 aligned_data = 0; 624 625 /* Setup the descriptor */ 626 desc.type = type; /* HV_VMBUS_PACKET_TYPE_DATA_IN_BAND; */ 627 desc.flags = flags; /* HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED */ 628 /* in 8-bytes granularity */ 629 desc.data_offset8 = sizeof(hv_vm_packet_descriptor) >> 3; 630 desc.length8 = (uint16_t) (packet_len_aligned >> 3); 631 desc.transaction_id = request_id; 632 633 buffer_list[0].data = &desc; 634 buffer_list[0].length = sizeof(hv_vm_packet_descriptor); 635 636 buffer_list[1].data = buffer; 637 buffer_list[1].length = buffer_len; 638 639 buffer_list[2].data = &aligned_data; 640 buffer_list[2].length = packet_len_aligned - packet_len; 641 642 ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3, 643 &need_sig); 644 645 /* TODO: We should determine if this is optional */ 646 if (ret == 0 && need_sig) { 647 vmbus_channel_set_event(channel); 648 } 649 650 return (ret); 651} 652 653/** 654 * @brief Send a range of single-page buffer packets using 655 * a GPADL Direct packet type 656 */ 657int 658hv_vmbus_channel_send_packet_pagebuffer( 659 hv_vmbus_channel* channel, 660 hv_vmbus_page_buffer page_buffers[], 661 uint32_t page_count, 662 void* buffer, 663 uint32_t buffer_len, 664 uint64_t request_id) 665{ 666 667 int ret = 0; 668 int i = 0; 669 boolean_t need_sig; 670 uint32_t packet_len; 671 uint32_t packetLen_aligned; 672 hv_vmbus_sg_buffer_list buffer_list[3]; 673 hv_vmbus_channel_packet_page_buffer desc; 674 uint32_t descSize; 675 uint64_t alignedData = 0; 676 677 if (page_count > HV_MAX_PAGE_BUFFER_COUNT) 678 return (EINVAL); 679 680 /* 681 * Adjust the size down since hv_vmbus_channel_packet_page_buffer 682 * is the largest size we support 683 */ 684 descSize = sizeof(hv_vmbus_channel_packet_page_buffer) - 685 ((HV_MAX_PAGE_BUFFER_COUNT - page_count) * 686 sizeof(hv_vmbus_page_buffer)); 687 packet_len = descSize + buffer_len; 688 packetLen_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 689 690 /* Setup the descriptor */ 691 desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 692 desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 693 desc.data_offset8 = descSize >> 3; /* in 8-bytes granularity */ 694 desc.length8 = (uint16_t) (packetLen_aligned >> 3); 695 desc.transaction_id = request_id; 696 desc.range_count = page_count; 697 698 for (i = 0; i < page_count; i++) { 699 desc.range[i].length = page_buffers[i].length; 700 desc.range[i].offset = page_buffers[i].offset; 701 desc.range[i].pfn = page_buffers[i].pfn; 702 } 703 704 buffer_list[0].data = &desc; 705 buffer_list[0].length = descSize; 706 707 buffer_list[1].data = buffer; 708 buffer_list[1].length = buffer_len; 709 710 buffer_list[2].data = &alignedData; 711 buffer_list[2].length = packetLen_aligned - packet_len; 712 713 ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3, 714 &need_sig); 715 716 /* TODO: We should determine if this is optional */ 717 if (ret == 0 && need_sig) { 718 vmbus_channel_set_event(channel); 719 } 720 721 return (ret); 722} 723 724/** 725 * @brief Send a multi-page buffer packet using a GPADL Direct packet type 726 */ 727int 728hv_vmbus_channel_send_packet_multipagebuffer( 729 hv_vmbus_channel* channel, 730 hv_vmbus_multipage_buffer* multi_page_buffer, 731 void* buffer, 732 uint32_t buffer_len, 733 uint64_t request_id) 734{ 735 736 int ret = 0; 737 uint32_t desc_size; 738 boolean_t need_sig; 739 uint32_t packet_len; 740 uint32_t packet_len_aligned; 741 uint32_t pfn_count; 742 uint64_t aligned_data = 0; 743 hv_vmbus_sg_buffer_list buffer_list[3]; 744 hv_vmbus_channel_packet_multipage_buffer desc; 745 746 pfn_count = 747 HV_NUM_PAGES_SPANNED( 748 multi_page_buffer->offset, 749 multi_page_buffer->length); 750 751 if ((pfn_count == 0) || (pfn_count > HV_MAX_MULTIPAGE_BUFFER_COUNT)) 752 return (EINVAL); 753 /* 754 * Adjust the size down since hv_vmbus_channel_packet_multipage_buffer 755 * is the largest size we support 756 */ 757 desc_size = 758 sizeof(hv_vmbus_channel_packet_multipage_buffer) - 759 ((HV_MAX_MULTIPAGE_BUFFER_COUNT - pfn_count) * 760 sizeof(uint64_t)); 761 packet_len = desc_size + buffer_len; 762 packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 763 764 /* 765 * Setup the descriptor 766 */ 767 desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 768 desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 769 desc.data_offset8 = desc_size >> 3; /* in 8-bytes granularity */ 770 desc.length8 = (uint16_t) (packet_len_aligned >> 3); 771 desc.transaction_id = request_id; 772 desc.range_count = 1; 773 774 desc.range.length = multi_page_buffer->length; 775 desc.range.offset = multi_page_buffer->offset; 776 777 memcpy(desc.range.pfn_array, multi_page_buffer->pfn_array, 778 pfn_count * sizeof(uint64_t)); 779 780 buffer_list[0].data = &desc; 781 buffer_list[0].length = desc_size; 782 783 buffer_list[1].data = buffer; 784 buffer_list[1].length = buffer_len; 785 786 buffer_list[2].data = &aligned_data; 787 buffer_list[2].length = packet_len_aligned - packet_len; 788 789 ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3, 790 &need_sig); 791 792 /* TODO: We should determine if this is optional */ 793 if (ret == 0 && need_sig) { 794 vmbus_channel_set_event(channel); 795 } 796 797 return (ret); 798} 799 800/** 801 * @brief Retrieve the user packet on the specified channel 802 */ 803int 804hv_vmbus_channel_recv_packet( 805 hv_vmbus_channel* channel, 806 void* Buffer, 807 uint32_t buffer_len, 808 uint32_t* buffer_actual_len, 809 uint64_t* request_id) 810{ 811 int ret; 812 uint32_t user_len; 813 uint32_t packet_len; 814 hv_vm_packet_descriptor desc; 815 816 *buffer_actual_len = 0; 817 *request_id = 0; 818 819 ret = hv_ring_buffer_peek(&channel->inbound, &desc, 820 sizeof(hv_vm_packet_descriptor)); 821 if (ret != 0) 822 return (0); 823 824 packet_len = desc.length8 << 3; 825 user_len = packet_len - (desc.data_offset8 << 3); 826 827 *buffer_actual_len = user_len; 828 829 if (user_len > buffer_len) 830 return (EINVAL); 831 832 *request_id = desc.transaction_id; 833 834 /* Copy over the packet to the user buffer */ 835 ret = hv_ring_buffer_read(&channel->inbound, Buffer, user_len, 836 (desc.data_offset8 << 3)); 837 838 return (0); 839} 840 841/** 842 * @brief Retrieve the raw packet on the specified channel 843 */ 844int 845hv_vmbus_channel_recv_packet_raw( 846 hv_vmbus_channel* channel, 847 void* buffer, 848 uint32_t buffer_len, 849 uint32_t* buffer_actual_len, 850 uint64_t* request_id) 851{ 852 int ret; 853 uint32_t packetLen; 854 uint32_t userLen; 855 hv_vm_packet_descriptor desc; 856 857 *buffer_actual_len = 0; 858 *request_id = 0; 859 860 ret = hv_ring_buffer_peek( 861 &channel->inbound, &desc, 862 sizeof(hv_vm_packet_descriptor)); 863 864 if (ret != 0) 865 return (0); 866 867 packetLen = desc.length8 << 3; 868 userLen = packetLen - (desc.data_offset8 << 3); 869 870 *buffer_actual_len = packetLen; 871 872 if (packetLen > buffer_len) 873 return (ENOBUFS); 874 875 *request_id = desc.transaction_id; 876 877 /* Copy over the entire packet to the user buffer */ 878 ret = hv_ring_buffer_read(&channel->inbound, buffer, packetLen, 0); 879 880 return (0); 881} 882