1250199Sgrehan/*- 2250199Sgrehan * Copyright (c) 2009-2012 Microsoft Corp. 3250199Sgrehan * Copyright (c) 2012 NetApp Inc. 4250199Sgrehan * Copyright (c) 2012 Citrix Inc. 5250199Sgrehan * All rights reserved. 6250199Sgrehan * 7250199Sgrehan * Redistribution and use in source and binary forms, with or without 8250199Sgrehan * modification, are permitted provided that the following conditions 9250199Sgrehan * are met: 10250199Sgrehan * 1. Redistributions of source code must retain the above copyright 11250199Sgrehan * notice unmodified, this list of conditions, and the following 12250199Sgrehan * disclaimer. 13250199Sgrehan * 2. Redistributions in binary form must reproduce the above copyright 14250199Sgrehan * notice, this list of conditions and the following disclaimer in the 15250199Sgrehan * documentation and/or other materials provided with the distribution. 16250199Sgrehan * 17250199Sgrehan * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18250199Sgrehan * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19250199Sgrehan * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20250199Sgrehan * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21250199Sgrehan * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22250199Sgrehan * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23250199Sgrehan * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24250199Sgrehan * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25250199Sgrehan * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26250199Sgrehan * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27250199Sgrehan */ 28250199Sgrehan 29256276Sdim#include <sys/cdefs.h> 30256276Sdim__FBSDID("$FreeBSD: releng/10.2/sys/dev/hyperv/vmbus/hv_channel.c 283280 2015-05-22 09:03:55Z whu $"); 31256276Sdim 32250199Sgrehan#include <sys/param.h> 33250199Sgrehan#include <sys/malloc.h> 34250199Sgrehan#include <sys/systm.h> 35250199Sgrehan#include <sys/mbuf.h> 36250199Sgrehan#include <sys/lock.h> 37250199Sgrehan#include <sys/mutex.h> 38250199Sgrehan#include <machine/bus.h> 39250199Sgrehan#include <vm/vm.h> 40250199Sgrehan#include <vm/vm_param.h> 41250199Sgrehan#include <vm/pmap.h> 42250199Sgrehan 43250199Sgrehan#include "hv_vmbus_priv.h" 44250199Sgrehan 45250199Sgrehanstatic int vmbus_channel_create_gpadl_header( 46250199Sgrehan /* must be phys and virt contiguous*/ 47250199Sgrehan void* contig_buffer, 48250199Sgrehan /* page-size multiple */ 49250199Sgrehan uint32_t size, 50250199Sgrehan hv_vmbus_channel_msg_info** msg_info, 51250199Sgrehan uint32_t* message_count); 52250199Sgrehan 53250199Sgrehanstatic void vmbus_channel_set_event(hv_vmbus_channel* channel); 54250199Sgrehan 55250199Sgrehan/** 56250199Sgrehan * @brief Trigger an event notification on the specified channel 57250199Sgrehan */ 58250199Sgrehanstatic void 59250199Sgrehanvmbus_channel_set_event(hv_vmbus_channel *channel) 60250199Sgrehan{ 61250199Sgrehan hv_vmbus_monitor_page *monitor_page; 62250199Sgrehan 63250199Sgrehan if (channel->offer_msg.monitor_allocated) { 64250199Sgrehan /* Each uint32_t represents 32 channels */ 65250199Sgrehan synch_set_bit((channel->offer_msg.child_rel_id & 31), 66250199Sgrehan ((uint32_t *)hv_vmbus_g_connection.send_interrupt_page 67250199Sgrehan + ((channel->offer_msg.child_rel_id >> 5)))); 68250199Sgrehan 69250199Sgrehan monitor_page = (hv_vmbus_monitor_page *) 70250199Sgrehan hv_vmbus_g_connection.monitor_pages; 71250199Sgrehan 72250199Sgrehan monitor_page++; /* Get the child to parent monitor page */ 73250199Sgrehan 74250199Sgrehan synch_set_bit(channel->monitor_bit, 75250199Sgrehan (uint32_t *)&monitor_page-> 76256276Sdim trigger_group[channel->monitor_group].u.pending); 77250199Sgrehan } else { 78283280Swhu hv_vmbus_set_event(channel); 79250199Sgrehan } 80250199Sgrehan 81250199Sgrehan} 82250199Sgrehan 83250199Sgrehan/** 84250199Sgrehan * @brief Open the specified channel 85250199Sgrehan */ 86250199Sgrehanint 87250199Sgrehanhv_vmbus_channel_open( 88250199Sgrehan hv_vmbus_channel* new_channel, 89250199Sgrehan uint32_t send_ring_buffer_size, 90250199Sgrehan uint32_t recv_ring_buffer_size, 91250199Sgrehan void* user_data, 92250199Sgrehan uint32_t user_data_len, 93250199Sgrehan hv_vmbus_pfn_channel_callback pfn_on_channel_callback, 94250199Sgrehan void* context) 95250199Sgrehan{ 96250199Sgrehan 97250199Sgrehan int ret = 0; 98250199Sgrehan void *in, *out; 99250199Sgrehan hv_vmbus_channel_open_channel* open_msg; 100250199Sgrehan hv_vmbus_channel_msg_info* open_info; 101250199Sgrehan 102283280Swhu mtx_lock(&new_channel->sc_lock); 103283280Swhu if (new_channel->state == HV_CHANNEL_OPEN_STATE) { 104283280Swhu new_channel->state = HV_CHANNEL_OPENING_STATE; 105283280Swhu } else { 106283280Swhu mtx_unlock(&new_channel->sc_lock); 107283280Swhu if(bootverbose) 108283280Swhu printf("VMBUS: Trying to open channel <%p> which in " 109283280Swhu "%d state.\n", new_channel, new_channel->state); 110283280Swhu return (EINVAL); 111283280Swhu } 112283280Swhu mtx_unlock(&new_channel->sc_lock); 113283280Swhu 114250199Sgrehan new_channel->on_channel_callback = pfn_on_channel_callback; 115250199Sgrehan new_channel->channel_callback_context = context; 116250199Sgrehan 117250199Sgrehan /* Allocate the ring buffer */ 118250199Sgrehan out = contigmalloc((send_ring_buffer_size + recv_ring_buffer_size), 119256352Sgrehan M_DEVBUF, M_ZERO, 0UL, BUS_SPACE_MAXADDR, PAGE_SIZE, 0); 120250199Sgrehan KASSERT(out != NULL, 121250199Sgrehan ("Error VMBUS: contigmalloc failed to allocate Ring Buffer!")); 122250199Sgrehan if (out == NULL) 123256352Sgrehan return (ENOMEM); 124250199Sgrehan 125250199Sgrehan in = ((uint8_t *) out + send_ring_buffer_size); 126250199Sgrehan 127250199Sgrehan new_channel->ring_buffer_pages = out; 128256352Sgrehan new_channel->ring_buffer_page_count = (send_ring_buffer_size + 129256352Sgrehan recv_ring_buffer_size) >> PAGE_SHIFT; 130256352Sgrehan new_channel->ring_buffer_size = send_ring_buffer_size + 131256352Sgrehan recv_ring_buffer_size; 132250199Sgrehan 133250199Sgrehan hv_vmbus_ring_buffer_init( 134250199Sgrehan &new_channel->outbound, 135250199Sgrehan out, 136250199Sgrehan send_ring_buffer_size); 137250199Sgrehan 138250199Sgrehan hv_vmbus_ring_buffer_init( 139250199Sgrehan &new_channel->inbound, 140250199Sgrehan in, 141250199Sgrehan recv_ring_buffer_size); 142250199Sgrehan 143250199Sgrehan /** 144250199Sgrehan * Establish the gpadl for the ring buffer 145250199Sgrehan */ 146250199Sgrehan new_channel->ring_buffer_gpadl_handle = 0; 147250199Sgrehan 148250199Sgrehan ret = hv_vmbus_channel_establish_gpadl(new_channel, 149250199Sgrehan new_channel->outbound.ring_buffer, 150250199Sgrehan send_ring_buffer_size + recv_ring_buffer_size, 151250199Sgrehan &new_channel->ring_buffer_gpadl_handle); 152250199Sgrehan 153250199Sgrehan /** 154250199Sgrehan * Create and init the channel open message 155250199Sgrehan */ 156250199Sgrehan open_info = (hv_vmbus_channel_msg_info*) malloc( 157250199Sgrehan sizeof(hv_vmbus_channel_msg_info) + 158250199Sgrehan sizeof(hv_vmbus_channel_open_channel), 159250199Sgrehan M_DEVBUF, 160250199Sgrehan M_NOWAIT); 161250199Sgrehan KASSERT(open_info != NULL, 162250199Sgrehan ("Error VMBUS: malloc failed to allocate Open Channel message!")); 163250199Sgrehan 164250199Sgrehan if (open_info == NULL) 165250199Sgrehan return (ENOMEM); 166250199Sgrehan 167250199Sgrehan sema_init(&open_info->wait_sema, 0, "Open Info Sema"); 168250199Sgrehan 169250199Sgrehan open_msg = (hv_vmbus_channel_open_channel*) open_info->msg; 170250199Sgrehan open_msg->header.message_type = HV_CHANNEL_MESSAGE_OPEN_CHANNEL; 171250199Sgrehan open_msg->open_id = new_channel->offer_msg.child_rel_id; 172250199Sgrehan open_msg->child_rel_id = new_channel->offer_msg.child_rel_id; 173250199Sgrehan open_msg->ring_buffer_gpadl_handle = 174250199Sgrehan new_channel->ring_buffer_gpadl_handle; 175250199Sgrehan open_msg->downstream_ring_buffer_page_offset = send_ring_buffer_size 176250199Sgrehan >> PAGE_SHIFT; 177283280Swhu open_msg->target_vcpu = new_channel->target_vcpu; 178250199Sgrehan 179250199Sgrehan if (user_data_len) 180250199Sgrehan memcpy(open_msg->user_data, user_data, user_data_len); 181250199Sgrehan 182250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 183250199Sgrehan TAILQ_INSERT_TAIL( 184250199Sgrehan &hv_vmbus_g_connection.channel_msg_anchor, 185250199Sgrehan open_info, 186250199Sgrehan msg_list_entry); 187250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 188250199Sgrehan 189250199Sgrehan ret = hv_vmbus_post_message( 190250199Sgrehan open_msg, sizeof(hv_vmbus_channel_open_channel)); 191250199Sgrehan 192250199Sgrehan if (ret != 0) 193250199Sgrehan goto cleanup; 194250199Sgrehan 195250199Sgrehan ret = sema_timedwait(&open_info->wait_sema, 500); /* KYS 5 seconds */ 196250199Sgrehan 197283280Swhu if (ret) { 198283280Swhu if(bootverbose) 199283280Swhu printf("VMBUS: channel <%p> open timeout.\n", new_channel); 200250199Sgrehan goto cleanup; 201283280Swhu } 202250199Sgrehan 203250199Sgrehan if (open_info->response.open_result.status == 0) { 204283280Swhu new_channel->state = HV_CHANNEL_OPENED_STATE; 205250199Sgrehan if(bootverbose) 206250199Sgrehan printf("VMBUS: channel <%p> open success.\n", new_channel); 207250199Sgrehan } else { 208250199Sgrehan if(bootverbose) 209250199Sgrehan printf("Error VMBUS: channel <%p> open failed - %d!\n", 210250199Sgrehan new_channel, open_info->response.open_result.status); 211250199Sgrehan } 212250199Sgrehan 213250199Sgrehan cleanup: 214250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 215250199Sgrehan TAILQ_REMOVE( 216250199Sgrehan &hv_vmbus_g_connection.channel_msg_anchor, 217250199Sgrehan open_info, 218250199Sgrehan msg_list_entry); 219250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 220250199Sgrehan sema_destroy(&open_info->wait_sema); 221250199Sgrehan free(open_info, M_DEVBUF); 222250199Sgrehan 223250199Sgrehan return (ret); 224250199Sgrehan} 225250199Sgrehan 226250199Sgrehan/** 227250199Sgrehan * @brief Create a gpadl for the specified buffer 228250199Sgrehan */ 229250199Sgrehanstatic int 230250199Sgrehanvmbus_channel_create_gpadl_header( 231250199Sgrehan void* contig_buffer, 232250199Sgrehan uint32_t size, /* page-size multiple */ 233250199Sgrehan hv_vmbus_channel_msg_info** msg_info, 234250199Sgrehan uint32_t* message_count) 235250199Sgrehan{ 236250199Sgrehan int i; 237250199Sgrehan int page_count; 238250199Sgrehan unsigned long long pfn; 239250199Sgrehan uint32_t msg_size; 240250199Sgrehan hv_vmbus_channel_gpadl_header* gpa_header; 241250199Sgrehan hv_vmbus_channel_gpadl_body* gpadl_body; 242250199Sgrehan hv_vmbus_channel_msg_info* msg_header; 243250199Sgrehan hv_vmbus_channel_msg_info* msg_body; 244250199Sgrehan 245250199Sgrehan int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; 246250199Sgrehan 247250199Sgrehan page_count = size >> PAGE_SHIFT; 248250199Sgrehan pfn = hv_get_phys_addr(contig_buffer) >> PAGE_SHIFT; 249250199Sgrehan 250250199Sgrehan /*do we need a gpadl body msg */ 251250199Sgrehan pfnSize = HV_MAX_SIZE_CHANNEL_MESSAGE 252250199Sgrehan - sizeof(hv_vmbus_channel_gpadl_header) 253250199Sgrehan - sizeof(hv_gpa_range); 254250199Sgrehan pfnCount = pfnSize / sizeof(uint64_t); 255250199Sgrehan 256250199Sgrehan if (page_count > pfnCount) { /* if(we need a gpadl body) */ 257250199Sgrehan /* fill in the header */ 258250199Sgrehan msg_size = sizeof(hv_vmbus_channel_msg_info) 259250199Sgrehan + sizeof(hv_vmbus_channel_gpadl_header) 260250199Sgrehan + sizeof(hv_gpa_range) 261250199Sgrehan + pfnCount * sizeof(uint64_t); 262250199Sgrehan msg_header = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 263250199Sgrehan KASSERT( 264250199Sgrehan msg_header != NULL, 265250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl Message!")); 266250199Sgrehan if (msg_header == NULL) 267250199Sgrehan return (ENOMEM); 268250199Sgrehan 269250199Sgrehan TAILQ_INIT(&msg_header->sub_msg_list_anchor); 270250199Sgrehan msg_header->message_size = msg_size; 271250199Sgrehan 272250199Sgrehan gpa_header = (hv_vmbus_channel_gpadl_header*) msg_header->msg; 273250199Sgrehan gpa_header->range_count = 1; 274250199Sgrehan gpa_header->range_buf_len = sizeof(hv_gpa_range) 275250199Sgrehan + page_count * sizeof(uint64_t); 276250199Sgrehan gpa_header->range[0].byte_offset = 0; 277250199Sgrehan gpa_header->range[0].byte_count = size; 278250199Sgrehan for (i = 0; i < pfnCount; i++) { 279250199Sgrehan gpa_header->range[0].pfn_array[i] = pfn + i; 280250199Sgrehan } 281250199Sgrehan *msg_info = msg_header; 282250199Sgrehan *message_count = 1; 283250199Sgrehan 284250199Sgrehan pfnSum = pfnCount; 285250199Sgrehan pfnLeft = page_count - pfnCount; 286250199Sgrehan 287250199Sgrehan /* 288250199Sgrehan * figure out how many pfns we can fit 289250199Sgrehan */ 290250199Sgrehan pfnSize = HV_MAX_SIZE_CHANNEL_MESSAGE 291250199Sgrehan - sizeof(hv_vmbus_channel_gpadl_body); 292250199Sgrehan pfnCount = pfnSize / sizeof(uint64_t); 293250199Sgrehan 294250199Sgrehan /* 295250199Sgrehan * fill in the body 296250199Sgrehan */ 297250199Sgrehan while (pfnLeft) { 298250199Sgrehan if (pfnLeft > pfnCount) { 299250199Sgrehan pfnCurr = pfnCount; 300250199Sgrehan } else { 301250199Sgrehan pfnCurr = pfnLeft; 302250199Sgrehan } 303250199Sgrehan 304250199Sgrehan msg_size = sizeof(hv_vmbus_channel_msg_info) + 305250199Sgrehan sizeof(hv_vmbus_channel_gpadl_body) + 306250199Sgrehan pfnCurr * sizeof(uint64_t); 307250199Sgrehan msg_body = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 308250199Sgrehan KASSERT( 309250199Sgrehan msg_body != NULL, 310250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl msg_body!")); 311250199Sgrehan if (msg_body == NULL) 312250199Sgrehan return (ENOMEM); 313250199Sgrehan 314250199Sgrehan msg_body->message_size = msg_size; 315250199Sgrehan (*message_count)++; 316250199Sgrehan gpadl_body = 317250199Sgrehan (hv_vmbus_channel_gpadl_body*) msg_body->msg; 318250199Sgrehan /* 319250199Sgrehan * gpadl_body->gpadl = kbuffer; 320250199Sgrehan */ 321250199Sgrehan for (i = 0; i < pfnCurr; i++) { 322250199Sgrehan gpadl_body->pfn[i] = pfn + pfnSum + i; 323250199Sgrehan } 324250199Sgrehan 325250199Sgrehan TAILQ_INSERT_TAIL( 326250199Sgrehan &msg_header->sub_msg_list_anchor, 327250199Sgrehan msg_body, 328250199Sgrehan msg_list_entry); 329250199Sgrehan pfnSum += pfnCurr; 330250199Sgrehan pfnLeft -= pfnCurr; 331250199Sgrehan } 332250199Sgrehan } else { /* else everything fits in a header */ 333250199Sgrehan 334250199Sgrehan msg_size = sizeof(hv_vmbus_channel_msg_info) + 335250199Sgrehan sizeof(hv_vmbus_channel_gpadl_header) + 336250199Sgrehan sizeof(hv_gpa_range) + 337250199Sgrehan page_count * sizeof(uint64_t); 338250199Sgrehan msg_header = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 339250199Sgrehan KASSERT( 340250199Sgrehan msg_header != NULL, 341250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl Message!")); 342250199Sgrehan if (msg_header == NULL) 343250199Sgrehan return (ENOMEM); 344250199Sgrehan 345250199Sgrehan msg_header->message_size = msg_size; 346250199Sgrehan 347250199Sgrehan gpa_header = (hv_vmbus_channel_gpadl_header*) msg_header->msg; 348250199Sgrehan gpa_header->range_count = 1; 349250199Sgrehan gpa_header->range_buf_len = sizeof(hv_gpa_range) + 350250199Sgrehan page_count * sizeof(uint64_t); 351250199Sgrehan gpa_header->range[0].byte_offset = 0; 352250199Sgrehan gpa_header->range[0].byte_count = size; 353250199Sgrehan for (i = 0; i < page_count; i++) { 354250199Sgrehan gpa_header->range[0].pfn_array[i] = pfn + i; 355250199Sgrehan } 356250199Sgrehan 357250199Sgrehan *msg_info = msg_header; 358250199Sgrehan *message_count = 1; 359250199Sgrehan } 360250199Sgrehan 361250199Sgrehan return (0); 362250199Sgrehan} 363250199Sgrehan 364250199Sgrehan/** 365250199Sgrehan * @brief Establish a GPADL for the specified buffer 366250199Sgrehan */ 367250199Sgrehanint 368250199Sgrehanhv_vmbus_channel_establish_gpadl( 369250199Sgrehan hv_vmbus_channel* channel, 370250199Sgrehan void* contig_buffer, 371250199Sgrehan uint32_t size, /* page-size multiple */ 372250199Sgrehan uint32_t* gpadl_handle) 373250199Sgrehan 374250199Sgrehan{ 375250199Sgrehan int ret = 0; 376250199Sgrehan hv_vmbus_channel_gpadl_header* gpadl_msg; 377250199Sgrehan hv_vmbus_channel_gpadl_body* gpadl_body; 378250199Sgrehan hv_vmbus_channel_msg_info* msg_info; 379250199Sgrehan hv_vmbus_channel_msg_info* sub_msg_info; 380250199Sgrehan uint32_t msg_count; 381250199Sgrehan hv_vmbus_channel_msg_info* curr; 382250199Sgrehan uint32_t next_gpadl_handle; 383250199Sgrehan 384250199Sgrehan next_gpadl_handle = hv_vmbus_g_connection.next_gpadl_handle; 385250199Sgrehan atomic_add_int((int*) &hv_vmbus_g_connection.next_gpadl_handle, 1); 386250199Sgrehan 387250199Sgrehan ret = vmbus_channel_create_gpadl_header( 388250199Sgrehan contig_buffer, size, &msg_info, &msg_count); 389250199Sgrehan 390250199Sgrehan if(ret != 0) { /* if(allocation failed) return immediately */ 391250199Sgrehan /* reverse atomic_add_int above */ 392250199Sgrehan atomic_subtract_int((int*) 393250199Sgrehan &hv_vmbus_g_connection.next_gpadl_handle, 1); 394250199Sgrehan return ret; 395250199Sgrehan } 396250199Sgrehan 397250199Sgrehan sema_init(&msg_info->wait_sema, 0, "Open Info Sema"); 398250199Sgrehan gpadl_msg = (hv_vmbus_channel_gpadl_header*) msg_info->msg; 399250199Sgrehan gpadl_msg->header.message_type = HV_CHANNEL_MESSAGEL_GPADL_HEADER; 400250199Sgrehan gpadl_msg->child_rel_id = channel->offer_msg.child_rel_id; 401250199Sgrehan gpadl_msg->gpadl = next_gpadl_handle; 402250199Sgrehan 403250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 404250199Sgrehan TAILQ_INSERT_TAIL( 405250199Sgrehan &hv_vmbus_g_connection.channel_msg_anchor, 406250199Sgrehan msg_info, 407250199Sgrehan msg_list_entry); 408250199Sgrehan 409250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 410250199Sgrehan 411250199Sgrehan ret = hv_vmbus_post_message( 412250199Sgrehan gpadl_msg, 413250199Sgrehan msg_info->message_size - 414250199Sgrehan (uint32_t) sizeof(hv_vmbus_channel_msg_info)); 415250199Sgrehan 416250199Sgrehan if (ret != 0) 417250199Sgrehan goto cleanup; 418250199Sgrehan 419250199Sgrehan if (msg_count > 1) { 420250199Sgrehan TAILQ_FOREACH(curr, 421250199Sgrehan &msg_info->sub_msg_list_anchor, msg_list_entry) { 422250199Sgrehan sub_msg_info = curr; 423250199Sgrehan gpadl_body = 424250199Sgrehan (hv_vmbus_channel_gpadl_body*) sub_msg_info->msg; 425250199Sgrehan 426250199Sgrehan gpadl_body->header.message_type = 427250199Sgrehan HV_CHANNEL_MESSAGE_GPADL_BODY; 428250199Sgrehan gpadl_body->gpadl = next_gpadl_handle; 429250199Sgrehan 430250199Sgrehan ret = hv_vmbus_post_message( 431250199Sgrehan gpadl_body, 432250199Sgrehan sub_msg_info->message_size 433250199Sgrehan - (uint32_t) sizeof(hv_vmbus_channel_msg_info)); 434250199Sgrehan /* if (the post message failed) give up and clean up */ 435250199Sgrehan if(ret != 0) 436250199Sgrehan goto cleanup; 437250199Sgrehan } 438250199Sgrehan } 439250199Sgrehan 440250199Sgrehan ret = sema_timedwait(&msg_info->wait_sema, 500); /* KYS 5 seconds*/ 441250199Sgrehan if (ret != 0) 442250199Sgrehan goto cleanup; 443250199Sgrehan 444250199Sgrehan *gpadl_handle = gpadl_msg->gpadl; 445250199Sgrehan 446250199Sgrehancleanup: 447250199Sgrehan 448250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 449250199Sgrehan TAILQ_REMOVE(&hv_vmbus_g_connection.channel_msg_anchor, 450250199Sgrehan msg_info, msg_list_entry); 451250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 452250199Sgrehan 453250199Sgrehan sema_destroy(&msg_info->wait_sema); 454250199Sgrehan free(msg_info, M_DEVBUF); 455250199Sgrehan 456250199Sgrehan return (ret); 457250199Sgrehan} 458250199Sgrehan 459250199Sgrehan/** 460250199Sgrehan * @brief Teardown the specified GPADL handle 461250199Sgrehan */ 462250199Sgrehanint 463250199Sgrehanhv_vmbus_channel_teardown_gpdal( 464250199Sgrehan hv_vmbus_channel* channel, 465250199Sgrehan uint32_t gpadl_handle) 466250199Sgrehan{ 467250199Sgrehan int ret = 0; 468250199Sgrehan hv_vmbus_channel_gpadl_teardown* msg; 469250199Sgrehan hv_vmbus_channel_msg_info* info; 470250199Sgrehan 471250199Sgrehan info = (hv_vmbus_channel_msg_info *) 472250199Sgrehan malloc( sizeof(hv_vmbus_channel_msg_info) + 473250199Sgrehan sizeof(hv_vmbus_channel_gpadl_teardown), 474250199Sgrehan M_DEVBUF, M_NOWAIT); 475250199Sgrehan KASSERT(info != NULL, 476250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl Teardown Msg!")); 477250199Sgrehan if (info == NULL) { 478250199Sgrehan ret = ENOMEM; 479250199Sgrehan goto cleanup; 480250199Sgrehan } 481250199Sgrehan 482250199Sgrehan sema_init(&info->wait_sema, 0, "Open Info Sema"); 483250199Sgrehan 484250199Sgrehan msg = (hv_vmbus_channel_gpadl_teardown*) info->msg; 485250199Sgrehan 486250199Sgrehan msg->header.message_type = HV_CHANNEL_MESSAGE_GPADL_TEARDOWN; 487250199Sgrehan msg->child_rel_id = channel->offer_msg.child_rel_id; 488250199Sgrehan msg->gpadl = gpadl_handle; 489250199Sgrehan 490250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 491250199Sgrehan TAILQ_INSERT_TAIL(&hv_vmbus_g_connection.channel_msg_anchor, 492250199Sgrehan info, msg_list_entry); 493250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 494250199Sgrehan 495250199Sgrehan ret = hv_vmbus_post_message(msg, 496250199Sgrehan sizeof(hv_vmbus_channel_gpadl_teardown)); 497250199Sgrehan if (ret != 0) 498250199Sgrehan goto cleanup; 499250199Sgrehan 500250199Sgrehan ret = sema_timedwait(&info->wait_sema, 500); /* KYS 5 seconds */ 501250199Sgrehan 502250199Sgrehancleanup: 503250199Sgrehan /* 504250199Sgrehan * Received a torndown response 505250199Sgrehan */ 506250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 507250199Sgrehan TAILQ_REMOVE(&hv_vmbus_g_connection.channel_msg_anchor, 508250199Sgrehan info, msg_list_entry); 509250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 510250199Sgrehan sema_destroy(&info->wait_sema); 511250199Sgrehan free(info, M_DEVBUF); 512250199Sgrehan 513250199Sgrehan return (ret); 514250199Sgrehan} 515250199Sgrehan 516283280Swhustatic void 517283280Swhuhv_vmbus_channel_close_internal(hv_vmbus_channel *channel) 518250199Sgrehan{ 519250199Sgrehan int ret = 0; 520250199Sgrehan hv_vmbus_channel_close_channel* msg; 521250199Sgrehan hv_vmbus_channel_msg_info* info; 522250199Sgrehan 523283280Swhu channel->state = HV_CHANNEL_OPEN_STATE; 524283280Swhu channel->sc_creation_callback = NULL; 525283280Swhu 526283280Swhu /* 527283280Swhu * Grab the lock to prevent race condition when a packet received 528283280Swhu * and unloading driver is in the process. 529283280Swhu */ 530250199Sgrehan mtx_lock(&channel->inbound_lock); 531250199Sgrehan channel->on_channel_callback = NULL; 532250199Sgrehan mtx_unlock(&channel->inbound_lock); 533250199Sgrehan 534250199Sgrehan /** 535250199Sgrehan * Send a closing message 536250199Sgrehan */ 537250199Sgrehan info = (hv_vmbus_channel_msg_info *) 538250199Sgrehan malloc( sizeof(hv_vmbus_channel_msg_info) + 539250199Sgrehan sizeof(hv_vmbus_channel_close_channel), 540250199Sgrehan M_DEVBUF, M_NOWAIT); 541250199Sgrehan KASSERT(info != NULL, ("VMBUS: malloc failed hv_vmbus_channel_close!")); 542250199Sgrehan if(info == NULL) 543250199Sgrehan return; 544250199Sgrehan 545250199Sgrehan msg = (hv_vmbus_channel_close_channel*) info->msg; 546250199Sgrehan msg->header.message_type = HV_CHANNEL_MESSAGE_CLOSE_CHANNEL; 547250199Sgrehan msg->child_rel_id = channel->offer_msg.child_rel_id; 548250199Sgrehan 549250199Sgrehan ret = hv_vmbus_post_message( 550250199Sgrehan msg, sizeof(hv_vmbus_channel_close_channel)); 551250199Sgrehan 552250199Sgrehan /* Tear down the gpadl for the channel's ring buffer */ 553250199Sgrehan if (channel->ring_buffer_gpadl_handle) { 554250199Sgrehan hv_vmbus_channel_teardown_gpdal(channel, 555250199Sgrehan channel->ring_buffer_gpadl_handle); 556250199Sgrehan } 557250199Sgrehan 558250199Sgrehan /* TODO: Send a msg to release the childRelId */ 559250199Sgrehan 560250199Sgrehan /* cleanup the ring buffers for this channel */ 561250199Sgrehan hv_ring_buffer_cleanup(&channel->outbound); 562250199Sgrehan hv_ring_buffer_cleanup(&channel->inbound); 563250199Sgrehan 564256352Sgrehan contigfree(channel->ring_buffer_pages, channel->ring_buffer_size, 565256352Sgrehan M_DEVBUF); 566250199Sgrehan 567250199Sgrehan free(info, M_DEVBUF); 568283280Swhu} 569250199Sgrehan 570283280Swhu/** 571283280Swhu * @brief Close the specified channel 572283280Swhu */ 573283280Swhuvoid 574283280Swhuhv_vmbus_channel_close(hv_vmbus_channel *channel) 575283280Swhu{ 576283280Swhu hv_vmbus_channel* sub_channel; 577283280Swhu 578283280Swhu if (channel->primary_channel != NULL) { 579283280Swhu /* 580283280Swhu * We only close multi-channels when the primary is 581283280Swhu * closed. 582283280Swhu */ 583283280Swhu return; 584283280Swhu } 585283280Swhu 586250199Sgrehan /* 587283280Swhu * Close all multi-channels first. 588250199Sgrehan */ 589283280Swhu TAILQ_FOREACH(sub_channel, &channel->sc_list_anchor, 590283280Swhu sc_list_entry) { 591283280Swhu if (sub_channel->state != HV_CHANNEL_OPENED_STATE) 592283280Swhu continue; 593283280Swhu hv_vmbus_channel_close_internal(sub_channel); 594250199Sgrehan } 595283280Swhu /* 596283280Swhu * Then close the primary channel. 597283280Swhu */ 598283280Swhu hv_vmbus_channel_close_internal(channel); 599250199Sgrehan} 600250199Sgrehan 601250199Sgrehan/** 602250199Sgrehan * @brief Send the specified buffer on the given channel 603250199Sgrehan */ 604250199Sgrehanint 605250199Sgrehanhv_vmbus_channel_send_packet( 606250199Sgrehan hv_vmbus_channel* channel, 607250199Sgrehan void* buffer, 608250199Sgrehan uint32_t buffer_len, 609250199Sgrehan uint64_t request_id, 610250199Sgrehan hv_vmbus_packet_type type, 611250199Sgrehan uint32_t flags) 612250199Sgrehan{ 613250199Sgrehan int ret = 0; 614250199Sgrehan hv_vm_packet_descriptor desc; 615250199Sgrehan uint32_t packet_len; 616250199Sgrehan uint64_t aligned_data; 617250199Sgrehan uint32_t packet_len_aligned; 618283280Swhu boolean_t need_sig; 619250199Sgrehan hv_vmbus_sg_buffer_list buffer_list[3]; 620250199Sgrehan 621250199Sgrehan packet_len = sizeof(hv_vm_packet_descriptor) + buffer_len; 622250199Sgrehan packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 623250199Sgrehan aligned_data = 0; 624250199Sgrehan 625250199Sgrehan /* Setup the descriptor */ 626250199Sgrehan desc.type = type; /* HV_VMBUS_PACKET_TYPE_DATA_IN_BAND; */ 627250199Sgrehan desc.flags = flags; /* HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED */ 628250199Sgrehan /* in 8-bytes granularity */ 629250199Sgrehan desc.data_offset8 = sizeof(hv_vm_packet_descriptor) >> 3; 630250199Sgrehan desc.length8 = (uint16_t) (packet_len_aligned >> 3); 631250199Sgrehan desc.transaction_id = request_id; 632250199Sgrehan 633250199Sgrehan buffer_list[0].data = &desc; 634250199Sgrehan buffer_list[0].length = sizeof(hv_vm_packet_descriptor); 635250199Sgrehan 636250199Sgrehan buffer_list[1].data = buffer; 637250199Sgrehan buffer_list[1].length = buffer_len; 638250199Sgrehan 639250199Sgrehan buffer_list[2].data = &aligned_data; 640250199Sgrehan buffer_list[2].length = packet_len_aligned - packet_len; 641250199Sgrehan 642283280Swhu ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3, 643283280Swhu &need_sig); 644250199Sgrehan 645250199Sgrehan /* TODO: We should determine if this is optional */ 646283280Swhu if (ret == 0 && need_sig) { 647250199Sgrehan vmbus_channel_set_event(channel); 648250199Sgrehan } 649250199Sgrehan 650250199Sgrehan return (ret); 651250199Sgrehan} 652250199Sgrehan 653250199Sgrehan/** 654250199Sgrehan * @brief Send a range of single-page buffer packets using 655250199Sgrehan * a GPADL Direct packet type 656250199Sgrehan */ 657250199Sgrehanint 658250199Sgrehanhv_vmbus_channel_send_packet_pagebuffer( 659250199Sgrehan hv_vmbus_channel* channel, 660250199Sgrehan hv_vmbus_page_buffer page_buffers[], 661250199Sgrehan uint32_t page_count, 662250199Sgrehan void* buffer, 663250199Sgrehan uint32_t buffer_len, 664250199Sgrehan uint64_t request_id) 665250199Sgrehan{ 666250199Sgrehan 667250199Sgrehan int ret = 0; 668250199Sgrehan int i = 0; 669283280Swhu boolean_t need_sig; 670250199Sgrehan uint32_t packet_len; 671250199Sgrehan uint32_t packetLen_aligned; 672250199Sgrehan hv_vmbus_sg_buffer_list buffer_list[3]; 673250199Sgrehan hv_vmbus_channel_packet_page_buffer desc; 674250199Sgrehan uint32_t descSize; 675250199Sgrehan uint64_t alignedData = 0; 676250199Sgrehan 677250199Sgrehan if (page_count > HV_MAX_PAGE_BUFFER_COUNT) 678250199Sgrehan return (EINVAL); 679250199Sgrehan 680250199Sgrehan /* 681250199Sgrehan * Adjust the size down since hv_vmbus_channel_packet_page_buffer 682250199Sgrehan * is the largest size we support 683250199Sgrehan */ 684250199Sgrehan descSize = sizeof(hv_vmbus_channel_packet_page_buffer) - 685250199Sgrehan ((HV_MAX_PAGE_BUFFER_COUNT - page_count) * 686250199Sgrehan sizeof(hv_vmbus_page_buffer)); 687250199Sgrehan packet_len = descSize + buffer_len; 688250199Sgrehan packetLen_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 689250199Sgrehan 690250199Sgrehan /* Setup the descriptor */ 691250199Sgrehan desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 692250199Sgrehan desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 693250199Sgrehan desc.data_offset8 = descSize >> 3; /* in 8-bytes granularity */ 694250199Sgrehan desc.length8 = (uint16_t) (packetLen_aligned >> 3); 695250199Sgrehan desc.transaction_id = request_id; 696250199Sgrehan desc.range_count = page_count; 697250199Sgrehan 698250199Sgrehan for (i = 0; i < page_count; i++) { 699250199Sgrehan desc.range[i].length = page_buffers[i].length; 700250199Sgrehan desc.range[i].offset = page_buffers[i].offset; 701250199Sgrehan desc.range[i].pfn = page_buffers[i].pfn; 702250199Sgrehan } 703250199Sgrehan 704250199Sgrehan buffer_list[0].data = &desc; 705250199Sgrehan buffer_list[0].length = descSize; 706250199Sgrehan 707250199Sgrehan buffer_list[1].data = buffer; 708250199Sgrehan buffer_list[1].length = buffer_len; 709250199Sgrehan 710250199Sgrehan buffer_list[2].data = &alignedData; 711250199Sgrehan buffer_list[2].length = packetLen_aligned - packet_len; 712250199Sgrehan 713283280Swhu ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3, 714283280Swhu &need_sig); 715250199Sgrehan 716250199Sgrehan /* TODO: We should determine if this is optional */ 717283280Swhu if (ret == 0 && need_sig) { 718250199Sgrehan vmbus_channel_set_event(channel); 719250199Sgrehan } 720250199Sgrehan 721250199Sgrehan return (ret); 722250199Sgrehan} 723250199Sgrehan 724250199Sgrehan/** 725250199Sgrehan * @brief Send a multi-page buffer packet using a GPADL Direct packet type 726250199Sgrehan */ 727250199Sgrehanint 728250199Sgrehanhv_vmbus_channel_send_packet_multipagebuffer( 729250199Sgrehan hv_vmbus_channel* channel, 730250199Sgrehan hv_vmbus_multipage_buffer* multi_page_buffer, 731250199Sgrehan void* buffer, 732250199Sgrehan uint32_t buffer_len, 733250199Sgrehan uint64_t request_id) 734250199Sgrehan{ 735250199Sgrehan 736250199Sgrehan int ret = 0; 737250199Sgrehan uint32_t desc_size; 738283280Swhu boolean_t need_sig; 739250199Sgrehan uint32_t packet_len; 740250199Sgrehan uint32_t packet_len_aligned; 741250199Sgrehan uint32_t pfn_count; 742250199Sgrehan uint64_t aligned_data = 0; 743250199Sgrehan hv_vmbus_sg_buffer_list buffer_list[3]; 744250199Sgrehan hv_vmbus_channel_packet_multipage_buffer desc; 745250199Sgrehan 746250199Sgrehan pfn_count = 747250199Sgrehan HV_NUM_PAGES_SPANNED( 748250199Sgrehan multi_page_buffer->offset, 749250199Sgrehan multi_page_buffer->length); 750250199Sgrehan 751250199Sgrehan if ((pfn_count == 0) || (pfn_count > HV_MAX_MULTIPAGE_BUFFER_COUNT)) 752250199Sgrehan return (EINVAL); 753250199Sgrehan /* 754250199Sgrehan * Adjust the size down since hv_vmbus_channel_packet_multipage_buffer 755250199Sgrehan * is the largest size we support 756250199Sgrehan */ 757250199Sgrehan desc_size = 758250199Sgrehan sizeof(hv_vmbus_channel_packet_multipage_buffer) - 759250199Sgrehan ((HV_MAX_MULTIPAGE_BUFFER_COUNT - pfn_count) * 760250199Sgrehan sizeof(uint64_t)); 761250199Sgrehan packet_len = desc_size + buffer_len; 762250199Sgrehan packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 763250199Sgrehan 764250199Sgrehan /* 765250199Sgrehan * Setup the descriptor 766250199Sgrehan */ 767250199Sgrehan desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 768250199Sgrehan desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 769250199Sgrehan desc.data_offset8 = desc_size >> 3; /* in 8-bytes granularity */ 770250199Sgrehan desc.length8 = (uint16_t) (packet_len_aligned >> 3); 771250199Sgrehan desc.transaction_id = request_id; 772250199Sgrehan desc.range_count = 1; 773250199Sgrehan 774250199Sgrehan desc.range.length = multi_page_buffer->length; 775250199Sgrehan desc.range.offset = multi_page_buffer->offset; 776250199Sgrehan 777250199Sgrehan memcpy(desc.range.pfn_array, multi_page_buffer->pfn_array, 778250199Sgrehan pfn_count * sizeof(uint64_t)); 779250199Sgrehan 780250199Sgrehan buffer_list[0].data = &desc; 781250199Sgrehan buffer_list[0].length = desc_size; 782250199Sgrehan 783250199Sgrehan buffer_list[1].data = buffer; 784250199Sgrehan buffer_list[1].length = buffer_len; 785250199Sgrehan 786250199Sgrehan buffer_list[2].data = &aligned_data; 787250199Sgrehan buffer_list[2].length = packet_len_aligned - packet_len; 788250199Sgrehan 789283280Swhu ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3, 790283280Swhu &need_sig); 791250199Sgrehan 792250199Sgrehan /* TODO: We should determine if this is optional */ 793283280Swhu if (ret == 0 && need_sig) { 794250199Sgrehan vmbus_channel_set_event(channel); 795250199Sgrehan } 796250199Sgrehan 797250199Sgrehan return (ret); 798250199Sgrehan} 799250199Sgrehan 800250199Sgrehan/** 801250199Sgrehan * @brief Retrieve the user packet on the specified channel 802250199Sgrehan */ 803250199Sgrehanint 804250199Sgrehanhv_vmbus_channel_recv_packet( 805250199Sgrehan hv_vmbus_channel* channel, 806250199Sgrehan void* Buffer, 807250199Sgrehan uint32_t buffer_len, 808250199Sgrehan uint32_t* buffer_actual_len, 809250199Sgrehan uint64_t* request_id) 810250199Sgrehan{ 811250199Sgrehan int ret; 812250199Sgrehan uint32_t user_len; 813250199Sgrehan uint32_t packet_len; 814250199Sgrehan hv_vm_packet_descriptor desc; 815250199Sgrehan 816250199Sgrehan *buffer_actual_len = 0; 817250199Sgrehan *request_id = 0; 818250199Sgrehan 819250199Sgrehan ret = hv_ring_buffer_peek(&channel->inbound, &desc, 820250199Sgrehan sizeof(hv_vm_packet_descriptor)); 821250199Sgrehan if (ret != 0) 822250199Sgrehan return (0); 823250199Sgrehan 824250199Sgrehan packet_len = desc.length8 << 3; 825250199Sgrehan user_len = packet_len - (desc.data_offset8 << 3); 826250199Sgrehan 827250199Sgrehan *buffer_actual_len = user_len; 828250199Sgrehan 829250199Sgrehan if (user_len > buffer_len) 830250199Sgrehan return (EINVAL); 831250199Sgrehan 832250199Sgrehan *request_id = desc.transaction_id; 833250199Sgrehan 834250199Sgrehan /* Copy over the packet to the user buffer */ 835250199Sgrehan ret = hv_ring_buffer_read(&channel->inbound, Buffer, user_len, 836250199Sgrehan (desc.data_offset8 << 3)); 837250199Sgrehan 838250199Sgrehan return (0); 839250199Sgrehan} 840250199Sgrehan 841250199Sgrehan/** 842250199Sgrehan * @brief Retrieve the raw packet on the specified channel 843250199Sgrehan */ 844250199Sgrehanint 845250199Sgrehanhv_vmbus_channel_recv_packet_raw( 846250199Sgrehan hv_vmbus_channel* channel, 847250199Sgrehan void* buffer, 848250199Sgrehan uint32_t buffer_len, 849250199Sgrehan uint32_t* buffer_actual_len, 850250199Sgrehan uint64_t* request_id) 851250199Sgrehan{ 852250199Sgrehan int ret; 853250199Sgrehan uint32_t packetLen; 854250199Sgrehan uint32_t userLen; 855250199Sgrehan hv_vm_packet_descriptor desc; 856250199Sgrehan 857250199Sgrehan *buffer_actual_len = 0; 858250199Sgrehan *request_id = 0; 859250199Sgrehan 860250199Sgrehan ret = hv_ring_buffer_peek( 861250199Sgrehan &channel->inbound, &desc, 862250199Sgrehan sizeof(hv_vm_packet_descriptor)); 863250199Sgrehan 864250199Sgrehan if (ret != 0) 865250199Sgrehan return (0); 866250199Sgrehan 867250199Sgrehan packetLen = desc.length8 << 3; 868250199Sgrehan userLen = packetLen - (desc.data_offset8 << 3); 869250199Sgrehan 870250199Sgrehan *buffer_actual_len = packetLen; 871250199Sgrehan 872250199Sgrehan if (packetLen > buffer_len) 873250199Sgrehan return (ENOBUFS); 874250199Sgrehan 875250199Sgrehan *request_id = desc.transaction_id; 876250199Sgrehan 877250199Sgrehan /* Copy over the entire packet to the user buffer */ 878250199Sgrehan ret = hv_ring_buffer_read(&channel->inbound, buffer, packetLen, 0); 879250199Sgrehan 880250199Sgrehan return (0); 881250199Sgrehan} 882