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/10.3/sys/dev/hyperv/vmbus/hv_channel.c 303984 2016-08-12 04:01:16Z glebius $"); 31 32#include <sys/param.h> 33#include <sys/kernel.h> 34#include <sys/malloc.h> 35#include <sys/systm.h> 36#include <sys/mbuf.h> 37#include <sys/lock.h> 38#include <sys/mutex.h> 39#include <machine/bus.h> 40#include <vm/vm.h> 41#include <vm/vm_param.h> 42#include <vm/pmap.h> 43 44#include "hv_vmbus_priv.h" 45 46static int vmbus_channel_create_gpadl_header( 47 /* must be phys and virt contiguous*/ 48 void* contig_buffer, 49 /* page-size multiple */ 50 uint32_t size, 51 hv_vmbus_channel_msg_info** msg_info, 52 uint32_t* message_count); 53 54static void vmbus_channel_set_event(hv_vmbus_channel* channel); 55 56/** 57 * @brief Trigger an event notification on the specified channel 58 */ 59static void 60vmbus_channel_set_event(hv_vmbus_channel *channel) 61{ 62 hv_vmbus_monitor_page *monitor_page; 63 64 if (channel->offer_msg.monitor_allocated) { 65 /* Each uint32_t represents 32 channels */ 66 synch_set_bit((channel->offer_msg.child_rel_id & 31), 67 ((uint32_t *)hv_vmbus_g_connection.send_interrupt_page 68 + ((channel->offer_msg.child_rel_id >> 5)))); 69 70 monitor_page = (hv_vmbus_monitor_page *) 71 hv_vmbus_g_connection.monitor_pages; 72 73 monitor_page++; /* Get the child to parent monitor page */ 74 75 synch_set_bit(channel->monitor_bit, 76 (uint32_t *)&monitor_page-> 77 trigger_group[channel->monitor_group].u.pending); 78 } else { 79 hv_vmbus_set_event(channel); 80 } 81 82} 83 84/** 85 * @brief Open the specified channel 86 */ 87int 88hv_vmbus_channel_open( 89 hv_vmbus_channel* new_channel, 90 uint32_t send_ring_buffer_size, 91 uint32_t recv_ring_buffer_size, 92 void* user_data, 93 uint32_t user_data_len, 94 hv_vmbus_pfn_channel_callback pfn_on_channel_callback, 95 void* context) 96{ 97 98 int ret = 0; 99 void *in, *out; 100 hv_vmbus_channel_open_channel* open_msg; 101 hv_vmbus_channel_msg_info* open_info; 102 103 mtx_lock(&new_channel->sc_lock); 104 if (new_channel->state == HV_CHANNEL_OPEN_STATE) { 105 new_channel->state = HV_CHANNEL_OPENING_STATE; 106 } else { 107 mtx_unlock(&new_channel->sc_lock); 108 if(bootverbose) 109 printf("VMBUS: Trying to open channel <%p> which in " 110 "%d state.\n", new_channel, new_channel->state); 111 return (EINVAL); 112 } 113 mtx_unlock(&new_channel->sc_lock); 114 115 new_channel->on_channel_callback = pfn_on_channel_callback; 116 new_channel->channel_callback_context = context; 117 118 /* Allocate the ring buffer */ 119 out = contigmalloc((send_ring_buffer_size + recv_ring_buffer_size), 120 M_DEVBUF, M_ZERO, 0UL, BUS_SPACE_MAXADDR, PAGE_SIZE, 0); 121 KASSERT(out != NULL, 122 ("Error VMBUS: contigmalloc failed to allocate Ring Buffer!")); 123 if (out == NULL) 124 return (ENOMEM); 125 126 in = ((uint8_t *) out + send_ring_buffer_size); 127 128 new_channel->ring_buffer_pages = out; 129 new_channel->ring_buffer_page_count = (send_ring_buffer_size + 130 recv_ring_buffer_size) >> PAGE_SHIFT; 131 new_channel->ring_buffer_size = send_ring_buffer_size + 132 recv_ring_buffer_size; 133 134 hv_vmbus_ring_buffer_init( 135 &new_channel->outbound, 136 out, 137 send_ring_buffer_size); 138 139 hv_vmbus_ring_buffer_init( 140 &new_channel->inbound, 141 in, 142 recv_ring_buffer_size); 143 144 /** 145 * Establish the gpadl for the ring buffer 146 */ 147 new_channel->ring_buffer_gpadl_handle = 0; 148 149 ret = hv_vmbus_channel_establish_gpadl(new_channel, 150 new_channel->outbound.ring_buffer, 151 send_ring_buffer_size + recv_ring_buffer_size, 152 &new_channel->ring_buffer_gpadl_handle); 153 154 /** 155 * Create and init the channel open message 156 */ 157 open_info = (hv_vmbus_channel_msg_info*) malloc( 158 sizeof(hv_vmbus_channel_msg_info) + 159 sizeof(hv_vmbus_channel_open_channel), 160 M_DEVBUF, 161 M_NOWAIT); 162 KASSERT(open_info != NULL, 163 ("Error VMBUS: malloc failed to allocate Open Channel message!")); 164 165 if (open_info == NULL) 166 return (ENOMEM); 167 168 sema_init(&open_info->wait_sema, 0, "Open Info Sema"); 169 170 open_msg = (hv_vmbus_channel_open_channel*) open_info->msg; 171 open_msg->header.message_type = HV_CHANNEL_MESSAGE_OPEN_CHANNEL; 172 open_msg->open_id = new_channel->offer_msg.child_rel_id; 173 open_msg->child_rel_id = new_channel->offer_msg.child_rel_id; 174 open_msg->ring_buffer_gpadl_handle = 175 new_channel->ring_buffer_gpadl_handle; 176 open_msg->downstream_ring_buffer_page_offset = send_ring_buffer_size 177 >> PAGE_SHIFT; 178 open_msg->target_vcpu = new_channel->target_vcpu; 179 180 if (user_data_len) 181 memcpy(open_msg->user_data, user_data, user_data_len); 182 183 mtx_lock(&hv_vmbus_g_connection.channel_msg_lock); 184 TAILQ_INSERT_TAIL( 185 &hv_vmbus_g_connection.channel_msg_anchor, 186 open_info, 187 msg_list_entry); 188 mtx_unlock(&hv_vmbus_g_connection.channel_msg_lock); 189 190 ret = hv_vmbus_post_message( 191 open_msg, sizeof(hv_vmbus_channel_open_channel)); 192 193 if (ret != 0) 194 goto cleanup; 195 196 ret = sema_timedwait(&open_info->wait_sema, 5 * hz); /* KYS 5 seconds */ 197 198 if (ret) { 199 if(bootverbose) 200 printf("VMBUS: channel <%p> open timeout.\n", new_channel); 201 goto cleanup; 202 } 203 204 if (open_info->response.open_result.status == 0) { 205 new_channel->state = HV_CHANNEL_OPENED_STATE; 206 if(bootverbose) 207 printf("VMBUS: channel <%p> open success.\n", new_channel); 208 } else { 209 if(bootverbose) 210 printf("Error VMBUS: channel <%p> open failed - %d!\n", 211 new_channel, open_info->response.open_result.status); 212 } 213 214 cleanup: 215 mtx_lock(&hv_vmbus_g_connection.channel_msg_lock); 216 TAILQ_REMOVE( 217 &hv_vmbus_g_connection.channel_msg_anchor, 218 open_info, 219 msg_list_entry); 220 mtx_unlock(&hv_vmbus_g_connection.channel_msg_lock); 221 sema_destroy(&open_info->wait_sema); 222 free(open_info, M_DEVBUF); 223 224 return (ret); 225} 226 227/** 228 * @brief Create a gpadl for the specified buffer 229 */ 230static int 231vmbus_channel_create_gpadl_header( 232 void* contig_buffer, 233 uint32_t size, /* page-size multiple */ 234 hv_vmbus_channel_msg_info** msg_info, 235 uint32_t* message_count) 236{ 237 int i; 238 int page_count; 239 unsigned long long pfn; 240 uint32_t msg_size; 241 hv_vmbus_channel_gpadl_header* gpa_header; 242 hv_vmbus_channel_gpadl_body* gpadl_body; 243 hv_vmbus_channel_msg_info* msg_header; 244 hv_vmbus_channel_msg_info* msg_body; 245 246 int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; 247 248 page_count = size >> PAGE_SHIFT; 249 pfn = hv_get_phys_addr(contig_buffer) >> PAGE_SHIFT; 250 251 /*do we need a gpadl body msg */ 252 pfnSize = HV_MAX_SIZE_CHANNEL_MESSAGE 253 - sizeof(hv_vmbus_channel_gpadl_header) 254 - sizeof(hv_gpa_range); 255 pfnCount = pfnSize / sizeof(uint64_t); 256 257 if (page_count > pfnCount) { /* if(we need a gpadl body) */ 258 /* fill in the header */ 259 msg_size = sizeof(hv_vmbus_channel_msg_info) 260 + sizeof(hv_vmbus_channel_gpadl_header) 261 + sizeof(hv_gpa_range) 262 + pfnCount * sizeof(uint64_t); 263 msg_header = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 264 KASSERT( 265 msg_header != NULL, 266 ("Error VMBUS: malloc failed to allocate Gpadl Message!")); 267 if (msg_header == NULL) 268 return (ENOMEM); 269 270 TAILQ_INIT(&msg_header->sub_msg_list_anchor); 271 msg_header->message_size = msg_size; 272 273 gpa_header = (hv_vmbus_channel_gpadl_header*) msg_header->msg; 274 gpa_header->range_count = 1; 275 gpa_header->range_buf_len = sizeof(hv_gpa_range) 276 + page_count * sizeof(uint64_t); 277 gpa_header->range[0].byte_offset = 0; 278 gpa_header->range[0].byte_count = size; 279 for (i = 0; i < pfnCount; i++) { 280 gpa_header->range[0].pfn_array[i] = pfn + i; 281 } 282 *msg_info = msg_header; 283 *message_count = 1; 284 285 pfnSum = pfnCount; 286 pfnLeft = page_count - pfnCount; 287 288 /* 289 * figure out how many pfns we can fit 290 */ 291 pfnSize = HV_MAX_SIZE_CHANNEL_MESSAGE 292 - sizeof(hv_vmbus_channel_gpadl_body); 293 pfnCount = pfnSize / sizeof(uint64_t); 294 295 /* 296 * fill in the body 297 */ 298 while (pfnLeft) { 299 if (pfnLeft > pfnCount) { 300 pfnCurr = pfnCount; 301 } else { 302 pfnCurr = pfnLeft; 303 } 304 305 msg_size = sizeof(hv_vmbus_channel_msg_info) + 306 sizeof(hv_vmbus_channel_gpadl_body) + 307 pfnCurr * sizeof(uint64_t); 308 msg_body = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 309 KASSERT( 310 msg_body != NULL, 311 ("Error VMBUS: malloc failed to allocate Gpadl msg_body!")); 312 if (msg_body == NULL) 313 return (ENOMEM); 314 315 msg_body->message_size = msg_size; 316 (*message_count)++; 317 gpadl_body = 318 (hv_vmbus_channel_gpadl_body*) msg_body->msg; 319 /* 320 * gpadl_body->gpadl = kbuffer; 321 */ 322 for (i = 0; i < pfnCurr; i++) { 323 gpadl_body->pfn[i] = pfn + pfnSum + i; 324 } 325 326 TAILQ_INSERT_TAIL( 327 &msg_header->sub_msg_list_anchor, 328 msg_body, 329 msg_list_entry); 330 pfnSum += pfnCurr; 331 pfnLeft -= pfnCurr; 332 } 333 } else { /* else everything fits in a header */ 334 335 msg_size = sizeof(hv_vmbus_channel_msg_info) + 336 sizeof(hv_vmbus_channel_gpadl_header) + 337 sizeof(hv_gpa_range) + 338 page_count * sizeof(uint64_t); 339 msg_header = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 340 KASSERT( 341 msg_header != NULL, 342 ("Error VMBUS: malloc failed to allocate Gpadl Message!")); 343 if (msg_header == NULL) 344 return (ENOMEM); 345 346 msg_header->message_size = msg_size; 347 348 gpa_header = (hv_vmbus_channel_gpadl_header*) msg_header->msg; 349 gpa_header->range_count = 1; 350 gpa_header->range_buf_len = sizeof(hv_gpa_range) + 351 page_count * sizeof(uint64_t); 352 gpa_header->range[0].byte_offset = 0; 353 gpa_header->range[0].byte_count = size; 354 for (i = 0; i < page_count; i++) { 355 gpa_header->range[0].pfn_array[i] = pfn + i; 356 } 357 358 *msg_info = msg_header; 359 *message_count = 1; 360 } 361 362 return (0); 363} 364 365/** 366 * @brief Establish a GPADL for the specified buffer 367 */ 368int 369hv_vmbus_channel_establish_gpadl( 370 hv_vmbus_channel* channel, 371 void* contig_buffer, 372 uint32_t size, /* page-size multiple */ 373 uint32_t* gpadl_handle) 374 375{ 376 int ret = 0; 377 hv_vmbus_channel_gpadl_header* gpadl_msg; 378 hv_vmbus_channel_gpadl_body* gpadl_body; 379 hv_vmbus_channel_msg_info* msg_info; 380 hv_vmbus_channel_msg_info* sub_msg_info; 381 uint32_t msg_count; 382 hv_vmbus_channel_msg_info* curr; 383 uint32_t next_gpadl_handle; 384 385 next_gpadl_handle = hv_vmbus_g_connection.next_gpadl_handle; 386 atomic_add_int((int*) &hv_vmbus_g_connection.next_gpadl_handle, 1); 387 388 ret = vmbus_channel_create_gpadl_header( 389 contig_buffer, size, &msg_info, &msg_count); 390 391 if(ret != 0) { /* if(allocation failed) return immediately */ 392 /* reverse atomic_add_int above */ 393 atomic_subtract_int((int*) 394 &hv_vmbus_g_connection.next_gpadl_handle, 1); 395 return ret; 396 } 397 398 sema_init(&msg_info->wait_sema, 0, "Open Info Sema"); 399 gpadl_msg = (hv_vmbus_channel_gpadl_header*) msg_info->msg; 400 gpadl_msg->header.message_type = HV_CHANNEL_MESSAGEL_GPADL_HEADER; 401 gpadl_msg->child_rel_id = channel->offer_msg.child_rel_id; 402 gpadl_msg->gpadl = next_gpadl_handle; 403 404 mtx_lock(&hv_vmbus_g_connection.channel_msg_lock); 405 TAILQ_INSERT_TAIL( 406 &hv_vmbus_g_connection.channel_msg_anchor, 407 msg_info, 408 msg_list_entry); 409 410 mtx_unlock(&hv_vmbus_g_connection.channel_msg_lock); 411 412 ret = hv_vmbus_post_message( 413 gpadl_msg, 414 msg_info->message_size - 415 (uint32_t) sizeof(hv_vmbus_channel_msg_info)); 416 417 if (ret != 0) 418 goto cleanup; 419 420 if (msg_count > 1) { 421 TAILQ_FOREACH(curr, 422 &msg_info->sub_msg_list_anchor, msg_list_entry) { 423 sub_msg_info = curr; 424 gpadl_body = 425 (hv_vmbus_channel_gpadl_body*) sub_msg_info->msg; 426 427 gpadl_body->header.message_type = 428 HV_CHANNEL_MESSAGE_GPADL_BODY; 429 gpadl_body->gpadl = next_gpadl_handle; 430 431 ret = hv_vmbus_post_message( 432 gpadl_body, 433 sub_msg_info->message_size 434 - (uint32_t) sizeof(hv_vmbus_channel_msg_info)); 435 /* if (the post message failed) give up and clean up */ 436 if(ret != 0) 437 goto cleanup; 438 } 439 } 440 441 ret = sema_timedwait(&msg_info->wait_sema, 5 * hz); /* KYS 5 seconds*/ 442 if (ret != 0) 443 goto cleanup; 444 445 *gpadl_handle = gpadl_msg->gpadl; 446 447cleanup: 448 449 mtx_lock(&hv_vmbus_g_connection.channel_msg_lock); 450 TAILQ_REMOVE(&hv_vmbus_g_connection.channel_msg_anchor, 451 msg_info, msg_list_entry); 452 mtx_unlock(&hv_vmbus_g_connection.channel_msg_lock); 453 454 sema_destroy(&msg_info->wait_sema); 455 free(msg_info, M_DEVBUF); 456 457 return (ret); 458} 459 460/** 461 * @brief Teardown the specified GPADL handle 462 */ 463int 464hv_vmbus_channel_teardown_gpdal( 465 hv_vmbus_channel* channel, 466 uint32_t gpadl_handle) 467{ 468 int ret = 0; 469 hv_vmbus_channel_gpadl_teardown* msg; 470 hv_vmbus_channel_msg_info* info; 471 472 info = (hv_vmbus_channel_msg_info *) 473 malloc( sizeof(hv_vmbus_channel_msg_info) + 474 sizeof(hv_vmbus_channel_gpadl_teardown), 475 M_DEVBUF, M_NOWAIT); 476 KASSERT(info != NULL, 477 ("Error VMBUS: malloc failed to allocate Gpadl Teardown Msg!")); 478 if (info == NULL) { 479 ret = ENOMEM; 480 goto cleanup; 481 } 482 483 sema_init(&info->wait_sema, 0, "Open Info Sema"); 484 485 msg = (hv_vmbus_channel_gpadl_teardown*) info->msg; 486 487 msg->header.message_type = HV_CHANNEL_MESSAGE_GPADL_TEARDOWN; 488 msg->child_rel_id = channel->offer_msg.child_rel_id; 489 msg->gpadl = gpadl_handle; 490 491 mtx_lock(&hv_vmbus_g_connection.channel_msg_lock); 492 TAILQ_INSERT_TAIL(&hv_vmbus_g_connection.channel_msg_anchor, 493 info, msg_list_entry); 494 mtx_unlock(&hv_vmbus_g_connection.channel_msg_lock); 495 496 ret = hv_vmbus_post_message(msg, 497 sizeof(hv_vmbus_channel_gpadl_teardown)); 498 if (ret != 0) 499 goto cleanup; 500 501 ret = sema_timedwait(&info->wait_sema, 5 * hz); /* KYS 5 seconds */ 502 503cleanup: 504 /* 505 * Received a torndown response 506 */ 507 mtx_lock(&hv_vmbus_g_connection.channel_msg_lock); 508 TAILQ_REMOVE(&hv_vmbus_g_connection.channel_msg_anchor, 509 info, msg_list_entry); 510 mtx_unlock(&hv_vmbus_g_connection.channel_msg_lock); 511 sema_destroy(&info->wait_sema); 512 free(info, M_DEVBUF); 513 514 return (ret); 515} 516 517static void 518hv_vmbus_channel_close_internal(hv_vmbus_channel *channel) 519{ 520 int ret = 0; 521 hv_vmbus_channel_close_channel* msg; 522 hv_vmbus_channel_msg_info* info; 523 524 channel->state = HV_CHANNEL_OPEN_STATE; 525 channel->sc_creation_callback = NULL; 526 527 /* 528 * Grab the lock to prevent race condition when a packet received 529 * and unloading driver is in the process. 530 */ 531 mtx_lock(&channel->inbound_lock); 532 channel->on_channel_callback = NULL; 533 mtx_unlock(&channel->inbound_lock); 534 535 /** 536 * Send a closing message 537 */ 538 info = (hv_vmbus_channel_msg_info *) 539 malloc( sizeof(hv_vmbus_channel_msg_info) + 540 sizeof(hv_vmbus_channel_close_channel), 541 M_DEVBUF, M_NOWAIT); 542 KASSERT(info != NULL, ("VMBUS: malloc failed hv_vmbus_channel_close!")); 543 if(info == NULL) 544 return; 545 546 msg = (hv_vmbus_channel_close_channel*) info->msg; 547 msg->header.message_type = HV_CHANNEL_MESSAGE_CLOSE_CHANNEL; 548 msg->child_rel_id = channel->offer_msg.child_rel_id; 549 550 ret = hv_vmbus_post_message( 551 msg, sizeof(hv_vmbus_channel_close_channel)); 552 553 /* Tear down the gpadl for the channel's ring buffer */ 554 if (channel->ring_buffer_gpadl_handle) { 555 hv_vmbus_channel_teardown_gpdal(channel, 556 channel->ring_buffer_gpadl_handle); 557 } 558 559 /* TODO: Send a msg to release the childRelId */ 560 561 /* cleanup the ring buffers for this channel */ 562 hv_ring_buffer_cleanup(&channel->outbound); 563 hv_ring_buffer_cleanup(&channel->inbound); 564 565 contigfree(channel->ring_buffer_pages, channel->ring_buffer_size, 566 M_DEVBUF); 567 568 free(info, M_DEVBUF); 569} 570 571/** 572 * @brief Close the specified channel 573 */ 574void 575hv_vmbus_channel_close(hv_vmbus_channel *channel) 576{ 577 hv_vmbus_channel* sub_channel; 578 579 if (channel->primary_channel != NULL) { 580 /* 581 * We only close multi-channels when the primary is 582 * closed. 583 */ 584 return; 585 } 586 587 /* 588 * Close all multi-channels first. 589 */ 590 TAILQ_FOREACH(sub_channel, &channel->sc_list_anchor, 591 sc_list_entry) { 592 if (sub_channel->state != HV_CHANNEL_OPENED_STATE) 593 continue; 594 hv_vmbus_channel_close_internal(sub_channel); 595 } 596 /* 597 * Then close the primary channel. 598 */ 599 hv_vmbus_channel_close_internal(channel); 600} 601 602/** 603 * @brief Send the specified buffer on the given channel 604 */ 605int 606hv_vmbus_channel_send_packet( 607 hv_vmbus_channel* channel, 608 void* buffer, 609 uint32_t buffer_len, 610 uint64_t request_id, 611 hv_vmbus_packet_type type, 612 uint32_t flags) 613{ 614 int ret = 0; 615 hv_vm_packet_descriptor desc; 616 uint32_t packet_len; 617 uint64_t aligned_data; 618 uint32_t packet_len_aligned; 619 boolean_t need_sig; 620 hv_vmbus_sg_buffer_list buffer_list[3]; 621 622 packet_len = sizeof(hv_vm_packet_descriptor) + buffer_len; 623 packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 624 aligned_data = 0; 625 626 /* Setup the descriptor */ 627 desc.type = type; /* HV_VMBUS_PACKET_TYPE_DATA_IN_BAND; */ 628 desc.flags = flags; /* HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED */ 629 /* in 8-bytes granularity */ 630 desc.data_offset8 = sizeof(hv_vm_packet_descriptor) >> 3; 631 desc.length8 = (uint16_t) (packet_len_aligned >> 3); 632 desc.transaction_id = request_id; 633 634 buffer_list[0].data = &desc; 635 buffer_list[0].length = sizeof(hv_vm_packet_descriptor); 636 637 buffer_list[1].data = buffer; 638 buffer_list[1].length = buffer_len; 639 640 buffer_list[2].data = &aligned_data; 641 buffer_list[2].length = packet_len_aligned - packet_len; 642 643 ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3, 644 &need_sig); 645 646 /* TODO: We should determine if this is optional */ 647 if (ret == 0 && need_sig) { 648 vmbus_channel_set_event(channel); 649 } 650 651 return (ret); 652} 653 654/** 655 * @brief Send a range of single-page buffer packets using 656 * a GPADL Direct packet type 657 */ 658int 659hv_vmbus_channel_send_packet_pagebuffer( 660 hv_vmbus_channel* channel, 661 hv_vmbus_page_buffer page_buffers[], 662 uint32_t page_count, 663 void* buffer, 664 uint32_t buffer_len, 665 uint64_t request_id) 666{ 667 668 int ret = 0; 669 int i = 0; 670 boolean_t need_sig; 671 uint32_t packet_len; 672 uint32_t packetLen_aligned; 673 hv_vmbus_sg_buffer_list buffer_list[3]; 674 hv_vmbus_channel_packet_page_buffer desc; 675 uint32_t descSize; 676 uint64_t alignedData = 0; 677 678 if (page_count > HV_MAX_PAGE_BUFFER_COUNT) 679 return (EINVAL); 680 681 /* 682 * Adjust the size down since hv_vmbus_channel_packet_page_buffer 683 * is the largest size we support 684 */ 685 descSize = sizeof(hv_vmbus_channel_packet_page_buffer) - 686 ((HV_MAX_PAGE_BUFFER_COUNT - page_count) * 687 sizeof(hv_vmbus_page_buffer)); 688 packet_len = descSize + buffer_len; 689 packetLen_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 690 691 /* Setup the descriptor */ 692 desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 693 desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 694 desc.data_offset8 = descSize >> 3; /* in 8-bytes granularity */ 695 desc.length8 = (uint16_t) (packetLen_aligned >> 3); 696 desc.transaction_id = request_id; 697 desc.range_count = page_count; 698 699 for (i = 0; i < page_count; i++) { 700 desc.range[i].length = page_buffers[i].length; 701 desc.range[i].offset = page_buffers[i].offset; 702 desc.range[i].pfn = page_buffers[i].pfn; 703 } 704 705 buffer_list[0].data = &desc; 706 buffer_list[0].length = descSize; 707 708 buffer_list[1].data = buffer; 709 buffer_list[1].length = buffer_len; 710 711 buffer_list[2].data = &alignedData; 712 buffer_list[2].length = packetLen_aligned - packet_len; 713 714 ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3, 715 &need_sig); 716 717 /* TODO: We should determine if this is optional */ 718 if (ret == 0 && need_sig) { 719 vmbus_channel_set_event(channel); 720 } 721 722 return (ret); 723} 724 725/** 726 * @brief Send a multi-page buffer packet using a GPADL Direct packet type 727 */ 728int 729hv_vmbus_channel_send_packet_multipagebuffer( 730 hv_vmbus_channel* channel, 731 hv_vmbus_multipage_buffer* multi_page_buffer, 732 void* buffer, 733 uint32_t buffer_len, 734 uint64_t request_id) 735{ 736 737 int ret = 0; 738 uint32_t desc_size; 739 boolean_t need_sig; 740 uint32_t packet_len; 741 uint32_t packet_len_aligned; 742 uint32_t pfn_count; 743 uint64_t aligned_data = 0; 744 hv_vmbus_sg_buffer_list buffer_list[3]; 745 hv_vmbus_channel_packet_multipage_buffer desc; 746 747 pfn_count = 748 HV_NUM_PAGES_SPANNED( 749 multi_page_buffer->offset, 750 multi_page_buffer->length); 751 752 if ((pfn_count == 0) || (pfn_count > HV_MAX_MULTIPAGE_BUFFER_COUNT)) 753 return (EINVAL); 754 /* 755 * Adjust the size down since hv_vmbus_channel_packet_multipage_buffer 756 * is the largest size we support 757 */ 758 desc_size = 759 sizeof(hv_vmbus_channel_packet_multipage_buffer) - 760 ((HV_MAX_MULTIPAGE_BUFFER_COUNT - pfn_count) * 761 sizeof(uint64_t)); 762 packet_len = desc_size + buffer_len; 763 packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 764 765 /* 766 * Setup the descriptor 767 */ 768 desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 769 desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 770 desc.data_offset8 = desc_size >> 3; /* in 8-bytes granularity */ 771 desc.length8 = (uint16_t) (packet_len_aligned >> 3); 772 desc.transaction_id = request_id; 773 desc.range_count = 1; 774 775 desc.range.length = multi_page_buffer->length; 776 desc.range.offset = multi_page_buffer->offset; 777 778 memcpy(desc.range.pfn_array, multi_page_buffer->pfn_array, 779 pfn_count * sizeof(uint64_t)); 780 781 buffer_list[0].data = &desc; 782 buffer_list[0].length = desc_size; 783 784 buffer_list[1].data = buffer; 785 buffer_list[1].length = buffer_len; 786 787 buffer_list[2].data = &aligned_data; 788 buffer_list[2].length = packet_len_aligned - packet_len; 789 790 ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3, 791 &need_sig); 792 793 /* TODO: We should determine if this is optional */ 794 if (ret == 0 && need_sig) { 795 vmbus_channel_set_event(channel); 796 } 797 798 return (ret); 799} 800 801/** 802 * @brief Retrieve the user packet on the specified channel 803 */ 804int 805hv_vmbus_channel_recv_packet( 806 hv_vmbus_channel* channel, 807 void* Buffer, 808 uint32_t buffer_len, 809 uint32_t* buffer_actual_len, 810 uint64_t* request_id) 811{ 812 int ret; 813 uint32_t user_len; 814 uint32_t packet_len; 815 hv_vm_packet_descriptor desc; 816 817 *buffer_actual_len = 0; 818 *request_id = 0; 819 820 ret = hv_ring_buffer_peek(&channel->inbound, &desc, 821 sizeof(hv_vm_packet_descriptor)); 822 if (ret != 0) 823 return (0); 824 825 packet_len = desc.length8 << 3; 826 user_len = packet_len - (desc.data_offset8 << 3); 827 828 *buffer_actual_len = user_len; 829 830 if (user_len > buffer_len) 831 return (EINVAL); 832 833 *request_id = desc.transaction_id; 834 835 /* Copy over the packet to the user buffer */ 836 ret = hv_ring_buffer_read(&channel->inbound, Buffer, user_len, 837 (desc.data_offset8 << 3)); 838 839 return (0); 840} 841 842/** 843 * @brief Retrieve the raw packet on the specified channel 844 */ 845int 846hv_vmbus_channel_recv_packet_raw( 847 hv_vmbus_channel* channel, 848 void* buffer, 849 uint32_t buffer_len, 850 uint32_t* buffer_actual_len, 851 uint64_t* request_id) 852{ 853 int ret; 854 uint32_t packetLen; 855 uint32_t userLen; 856 hv_vm_packet_descriptor desc; 857 858 *buffer_actual_len = 0; 859 *request_id = 0; 860 861 ret = hv_ring_buffer_peek( 862 &channel->inbound, &desc, 863 sizeof(hv_vm_packet_descriptor)); 864 865 if (ret != 0) 866 return (0); 867 868 packetLen = desc.length8 << 3; 869 userLen = packetLen - (desc.data_offset8 << 3); 870 871 *buffer_actual_len = packetLen; 872 873 if (packetLen > buffer_len) 874 return (ENOBUFS); 875 876 *request_id = desc.transaction_id; 877 878 /* Copy over the entire packet to the user buffer */ 879 ret = hv_ring_buffer_read(&channel->inbound, buffer, packetLen, 0); 880 881 return (0); 882} 883