hv_channel.c revision 256276
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: head/sys/dev/hyperv/vmbus/hv_channel.c 256276 2013-10-10 16:25:53Z dim $"); 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 { 78250199Sgrehan hv_vmbus_set_event(channel->offer_msg.child_rel_id); 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 102250199Sgrehan new_channel->on_channel_callback = pfn_on_channel_callback; 103250199Sgrehan new_channel->channel_callback_context = context; 104250199Sgrehan 105250199Sgrehan /* Allocate the ring buffer */ 106250199Sgrehan out = contigmalloc((send_ring_buffer_size + recv_ring_buffer_size), 107250199Sgrehan M_DEVBUF, M_ZERO, 0UL, BUS_SPACE_MAXADDR, PAGE_SIZE, 0); 108250199Sgrehan KASSERT(out != NULL, 109250199Sgrehan ("Error VMBUS: contigmalloc failed to allocate Ring Buffer!")); 110250199Sgrehan if (out == NULL) 111250199Sgrehan return (ENOMEM); 112250199Sgrehan 113250199Sgrehan in = ((uint8_t *) out + send_ring_buffer_size); 114250199Sgrehan 115250199Sgrehan new_channel->ring_buffer_pages = out; 116250199Sgrehan new_channel->ring_buffer_page_count = (send_ring_buffer_size 117250199Sgrehan + recv_ring_buffer_size) >> PAGE_SHIFT; 118250199Sgrehan 119250199Sgrehan hv_vmbus_ring_buffer_init( 120250199Sgrehan &new_channel->outbound, 121250199Sgrehan out, 122250199Sgrehan send_ring_buffer_size); 123250199Sgrehan 124250199Sgrehan hv_vmbus_ring_buffer_init( 125250199Sgrehan &new_channel->inbound, 126250199Sgrehan in, 127250199Sgrehan recv_ring_buffer_size); 128250199Sgrehan 129250199Sgrehan /** 130250199Sgrehan * Establish the gpadl for the ring buffer 131250199Sgrehan */ 132250199Sgrehan new_channel->ring_buffer_gpadl_handle = 0; 133250199Sgrehan 134250199Sgrehan ret = hv_vmbus_channel_establish_gpadl(new_channel, 135250199Sgrehan new_channel->outbound.ring_buffer, 136250199Sgrehan send_ring_buffer_size + recv_ring_buffer_size, 137250199Sgrehan &new_channel->ring_buffer_gpadl_handle); 138250199Sgrehan 139250199Sgrehan /** 140250199Sgrehan * Create and init the channel open message 141250199Sgrehan */ 142250199Sgrehan open_info = (hv_vmbus_channel_msg_info*) malloc( 143250199Sgrehan sizeof(hv_vmbus_channel_msg_info) + 144250199Sgrehan sizeof(hv_vmbus_channel_open_channel), 145250199Sgrehan M_DEVBUF, 146250199Sgrehan M_NOWAIT); 147250199Sgrehan KASSERT(open_info != NULL, 148250199Sgrehan ("Error VMBUS: malloc failed to allocate Open Channel message!")); 149250199Sgrehan 150250199Sgrehan if (open_info == NULL) 151250199Sgrehan return (ENOMEM); 152250199Sgrehan 153250199Sgrehan sema_init(&open_info->wait_sema, 0, "Open Info Sema"); 154250199Sgrehan 155250199Sgrehan open_msg = (hv_vmbus_channel_open_channel*) open_info->msg; 156250199Sgrehan open_msg->header.message_type = HV_CHANNEL_MESSAGE_OPEN_CHANNEL; 157250199Sgrehan open_msg->open_id = new_channel->offer_msg.child_rel_id; 158250199Sgrehan open_msg->child_rel_id = new_channel->offer_msg.child_rel_id; 159250199Sgrehan open_msg->ring_buffer_gpadl_handle = 160250199Sgrehan new_channel->ring_buffer_gpadl_handle; 161250199Sgrehan open_msg->downstream_ring_buffer_page_offset = send_ring_buffer_size 162250199Sgrehan >> PAGE_SHIFT; 163250199Sgrehan open_msg->server_context_area_gpadl_handle = 0; 164250199Sgrehan 165250199Sgrehan if (user_data_len) 166250199Sgrehan memcpy(open_msg->user_data, user_data, user_data_len); 167250199Sgrehan 168250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 169250199Sgrehan TAILQ_INSERT_TAIL( 170250199Sgrehan &hv_vmbus_g_connection.channel_msg_anchor, 171250199Sgrehan open_info, 172250199Sgrehan msg_list_entry); 173250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 174250199Sgrehan 175250199Sgrehan ret = hv_vmbus_post_message( 176250199Sgrehan open_msg, sizeof(hv_vmbus_channel_open_channel)); 177250199Sgrehan 178250199Sgrehan if (ret != 0) 179250199Sgrehan goto cleanup; 180250199Sgrehan 181250199Sgrehan ret = sema_timedwait(&open_info->wait_sema, 500); /* KYS 5 seconds */ 182250199Sgrehan 183250199Sgrehan if (ret) 184250199Sgrehan goto cleanup; 185250199Sgrehan 186250199Sgrehan if (open_info->response.open_result.status == 0) { 187250199Sgrehan if(bootverbose) 188250199Sgrehan printf("VMBUS: channel <%p> open success.\n", new_channel); 189250199Sgrehan } else { 190250199Sgrehan if(bootverbose) 191250199Sgrehan printf("Error VMBUS: channel <%p> open failed - %d!\n", 192250199Sgrehan new_channel, open_info->response.open_result.status); 193250199Sgrehan } 194250199Sgrehan 195250199Sgrehan cleanup: 196250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 197250199Sgrehan TAILQ_REMOVE( 198250199Sgrehan &hv_vmbus_g_connection.channel_msg_anchor, 199250199Sgrehan open_info, 200250199Sgrehan msg_list_entry); 201250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 202250199Sgrehan sema_destroy(&open_info->wait_sema); 203250199Sgrehan free(open_info, M_DEVBUF); 204250199Sgrehan 205250199Sgrehan return (ret); 206250199Sgrehan} 207250199Sgrehan 208250199Sgrehan/** 209250199Sgrehan * @brief Create a gpadl for the specified buffer 210250199Sgrehan */ 211250199Sgrehanstatic int 212250199Sgrehanvmbus_channel_create_gpadl_header( 213250199Sgrehan void* contig_buffer, 214250199Sgrehan uint32_t size, /* page-size multiple */ 215250199Sgrehan hv_vmbus_channel_msg_info** msg_info, 216250199Sgrehan uint32_t* message_count) 217250199Sgrehan{ 218250199Sgrehan int i; 219250199Sgrehan int page_count; 220250199Sgrehan unsigned long long pfn; 221250199Sgrehan uint32_t msg_size; 222250199Sgrehan hv_vmbus_channel_gpadl_header* gpa_header; 223250199Sgrehan hv_vmbus_channel_gpadl_body* gpadl_body; 224250199Sgrehan hv_vmbus_channel_msg_info* msg_header; 225250199Sgrehan hv_vmbus_channel_msg_info* msg_body; 226250199Sgrehan 227250199Sgrehan int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; 228250199Sgrehan 229250199Sgrehan page_count = size >> PAGE_SHIFT; 230250199Sgrehan pfn = hv_get_phys_addr(contig_buffer) >> PAGE_SHIFT; 231250199Sgrehan 232250199Sgrehan /*do we need a gpadl body msg */ 233250199Sgrehan pfnSize = HV_MAX_SIZE_CHANNEL_MESSAGE 234250199Sgrehan - sizeof(hv_vmbus_channel_gpadl_header) 235250199Sgrehan - sizeof(hv_gpa_range); 236250199Sgrehan pfnCount = pfnSize / sizeof(uint64_t); 237250199Sgrehan 238250199Sgrehan if (page_count > pfnCount) { /* if(we need a gpadl body) */ 239250199Sgrehan /* fill in the header */ 240250199Sgrehan msg_size = sizeof(hv_vmbus_channel_msg_info) 241250199Sgrehan + sizeof(hv_vmbus_channel_gpadl_header) 242250199Sgrehan + sizeof(hv_gpa_range) 243250199Sgrehan + pfnCount * sizeof(uint64_t); 244250199Sgrehan msg_header = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 245250199Sgrehan KASSERT( 246250199Sgrehan msg_header != NULL, 247250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl Message!")); 248250199Sgrehan if (msg_header == NULL) 249250199Sgrehan return (ENOMEM); 250250199Sgrehan 251250199Sgrehan TAILQ_INIT(&msg_header->sub_msg_list_anchor); 252250199Sgrehan msg_header->message_size = msg_size; 253250199Sgrehan 254250199Sgrehan gpa_header = (hv_vmbus_channel_gpadl_header*) msg_header->msg; 255250199Sgrehan gpa_header->range_count = 1; 256250199Sgrehan gpa_header->range_buf_len = sizeof(hv_gpa_range) 257250199Sgrehan + page_count * sizeof(uint64_t); 258250199Sgrehan gpa_header->range[0].byte_offset = 0; 259250199Sgrehan gpa_header->range[0].byte_count = size; 260250199Sgrehan for (i = 0; i < pfnCount; i++) { 261250199Sgrehan gpa_header->range[0].pfn_array[i] = pfn + i; 262250199Sgrehan } 263250199Sgrehan *msg_info = msg_header; 264250199Sgrehan *message_count = 1; 265250199Sgrehan 266250199Sgrehan pfnSum = pfnCount; 267250199Sgrehan pfnLeft = page_count - pfnCount; 268250199Sgrehan 269250199Sgrehan /* 270250199Sgrehan * figure out how many pfns we can fit 271250199Sgrehan */ 272250199Sgrehan pfnSize = HV_MAX_SIZE_CHANNEL_MESSAGE 273250199Sgrehan - sizeof(hv_vmbus_channel_gpadl_body); 274250199Sgrehan pfnCount = pfnSize / sizeof(uint64_t); 275250199Sgrehan 276250199Sgrehan /* 277250199Sgrehan * fill in the body 278250199Sgrehan */ 279250199Sgrehan while (pfnLeft) { 280250199Sgrehan if (pfnLeft > pfnCount) { 281250199Sgrehan pfnCurr = pfnCount; 282250199Sgrehan } else { 283250199Sgrehan pfnCurr = pfnLeft; 284250199Sgrehan } 285250199Sgrehan 286250199Sgrehan msg_size = sizeof(hv_vmbus_channel_msg_info) + 287250199Sgrehan sizeof(hv_vmbus_channel_gpadl_body) + 288250199Sgrehan pfnCurr * sizeof(uint64_t); 289250199Sgrehan msg_body = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 290250199Sgrehan KASSERT( 291250199Sgrehan msg_body != NULL, 292250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl msg_body!")); 293250199Sgrehan if (msg_body == NULL) 294250199Sgrehan return (ENOMEM); 295250199Sgrehan 296250199Sgrehan msg_body->message_size = msg_size; 297250199Sgrehan (*message_count)++; 298250199Sgrehan gpadl_body = 299250199Sgrehan (hv_vmbus_channel_gpadl_body*) msg_body->msg; 300250199Sgrehan /* 301250199Sgrehan * gpadl_body->gpadl = kbuffer; 302250199Sgrehan */ 303250199Sgrehan for (i = 0; i < pfnCurr; i++) { 304250199Sgrehan gpadl_body->pfn[i] = pfn + pfnSum + i; 305250199Sgrehan } 306250199Sgrehan 307250199Sgrehan TAILQ_INSERT_TAIL( 308250199Sgrehan &msg_header->sub_msg_list_anchor, 309250199Sgrehan msg_body, 310250199Sgrehan msg_list_entry); 311250199Sgrehan pfnSum += pfnCurr; 312250199Sgrehan pfnLeft -= pfnCurr; 313250199Sgrehan } 314250199Sgrehan } else { /* else everything fits in a header */ 315250199Sgrehan 316250199Sgrehan msg_size = sizeof(hv_vmbus_channel_msg_info) + 317250199Sgrehan sizeof(hv_vmbus_channel_gpadl_header) + 318250199Sgrehan sizeof(hv_gpa_range) + 319250199Sgrehan page_count * sizeof(uint64_t); 320250199Sgrehan msg_header = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 321250199Sgrehan KASSERT( 322250199Sgrehan msg_header != NULL, 323250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl Message!")); 324250199Sgrehan if (msg_header == NULL) 325250199Sgrehan return (ENOMEM); 326250199Sgrehan 327250199Sgrehan msg_header->message_size = msg_size; 328250199Sgrehan 329250199Sgrehan gpa_header = (hv_vmbus_channel_gpadl_header*) msg_header->msg; 330250199Sgrehan gpa_header->range_count = 1; 331250199Sgrehan gpa_header->range_buf_len = sizeof(hv_gpa_range) + 332250199Sgrehan page_count * sizeof(uint64_t); 333250199Sgrehan gpa_header->range[0].byte_offset = 0; 334250199Sgrehan gpa_header->range[0].byte_count = size; 335250199Sgrehan for (i = 0; i < page_count; i++) { 336250199Sgrehan gpa_header->range[0].pfn_array[i] = pfn + i; 337250199Sgrehan } 338250199Sgrehan 339250199Sgrehan *msg_info = msg_header; 340250199Sgrehan *message_count = 1; 341250199Sgrehan } 342250199Sgrehan 343250199Sgrehan return (0); 344250199Sgrehan} 345250199Sgrehan 346250199Sgrehan/** 347250199Sgrehan * @brief Establish a GPADL for the specified buffer 348250199Sgrehan */ 349250199Sgrehanint 350250199Sgrehanhv_vmbus_channel_establish_gpadl( 351250199Sgrehan hv_vmbus_channel* channel, 352250199Sgrehan void* contig_buffer, 353250199Sgrehan uint32_t size, /* page-size multiple */ 354250199Sgrehan uint32_t* gpadl_handle) 355250199Sgrehan 356250199Sgrehan{ 357250199Sgrehan int ret = 0; 358250199Sgrehan hv_vmbus_channel_gpadl_header* gpadl_msg; 359250199Sgrehan hv_vmbus_channel_gpadl_body* gpadl_body; 360250199Sgrehan hv_vmbus_channel_msg_info* msg_info; 361250199Sgrehan hv_vmbus_channel_msg_info* sub_msg_info; 362250199Sgrehan uint32_t msg_count; 363250199Sgrehan hv_vmbus_channel_msg_info* curr; 364250199Sgrehan uint32_t next_gpadl_handle; 365250199Sgrehan 366250199Sgrehan next_gpadl_handle = hv_vmbus_g_connection.next_gpadl_handle; 367250199Sgrehan atomic_add_int((int*) &hv_vmbus_g_connection.next_gpadl_handle, 1); 368250199Sgrehan 369250199Sgrehan ret = vmbus_channel_create_gpadl_header( 370250199Sgrehan contig_buffer, size, &msg_info, &msg_count); 371250199Sgrehan 372250199Sgrehan if(ret != 0) { /* if(allocation failed) return immediately */ 373250199Sgrehan /* reverse atomic_add_int above */ 374250199Sgrehan atomic_subtract_int((int*) 375250199Sgrehan &hv_vmbus_g_connection.next_gpadl_handle, 1); 376250199Sgrehan return ret; 377250199Sgrehan } 378250199Sgrehan 379250199Sgrehan sema_init(&msg_info->wait_sema, 0, "Open Info Sema"); 380250199Sgrehan gpadl_msg = (hv_vmbus_channel_gpadl_header*) msg_info->msg; 381250199Sgrehan gpadl_msg->header.message_type = HV_CHANNEL_MESSAGEL_GPADL_HEADER; 382250199Sgrehan gpadl_msg->child_rel_id = channel->offer_msg.child_rel_id; 383250199Sgrehan gpadl_msg->gpadl = next_gpadl_handle; 384250199Sgrehan 385250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 386250199Sgrehan TAILQ_INSERT_TAIL( 387250199Sgrehan &hv_vmbus_g_connection.channel_msg_anchor, 388250199Sgrehan msg_info, 389250199Sgrehan msg_list_entry); 390250199Sgrehan 391250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 392250199Sgrehan 393250199Sgrehan ret = hv_vmbus_post_message( 394250199Sgrehan gpadl_msg, 395250199Sgrehan msg_info->message_size - 396250199Sgrehan (uint32_t) sizeof(hv_vmbus_channel_msg_info)); 397250199Sgrehan 398250199Sgrehan if (ret != 0) 399250199Sgrehan goto cleanup; 400250199Sgrehan 401250199Sgrehan if (msg_count > 1) { 402250199Sgrehan TAILQ_FOREACH(curr, 403250199Sgrehan &msg_info->sub_msg_list_anchor, msg_list_entry) { 404250199Sgrehan sub_msg_info = curr; 405250199Sgrehan gpadl_body = 406250199Sgrehan (hv_vmbus_channel_gpadl_body*) sub_msg_info->msg; 407250199Sgrehan 408250199Sgrehan gpadl_body->header.message_type = 409250199Sgrehan HV_CHANNEL_MESSAGE_GPADL_BODY; 410250199Sgrehan gpadl_body->gpadl = next_gpadl_handle; 411250199Sgrehan 412250199Sgrehan ret = hv_vmbus_post_message( 413250199Sgrehan gpadl_body, 414250199Sgrehan sub_msg_info->message_size 415250199Sgrehan - (uint32_t) sizeof(hv_vmbus_channel_msg_info)); 416250199Sgrehan /* if (the post message failed) give up and clean up */ 417250199Sgrehan if(ret != 0) 418250199Sgrehan goto cleanup; 419250199Sgrehan } 420250199Sgrehan } 421250199Sgrehan 422250199Sgrehan ret = sema_timedwait(&msg_info->wait_sema, 500); /* KYS 5 seconds*/ 423250199Sgrehan if (ret != 0) 424250199Sgrehan goto cleanup; 425250199Sgrehan 426250199Sgrehan *gpadl_handle = gpadl_msg->gpadl; 427250199Sgrehan 428250199Sgrehancleanup: 429250199Sgrehan 430250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 431250199Sgrehan TAILQ_REMOVE(&hv_vmbus_g_connection.channel_msg_anchor, 432250199Sgrehan msg_info, msg_list_entry); 433250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 434250199Sgrehan 435250199Sgrehan sema_destroy(&msg_info->wait_sema); 436250199Sgrehan free(msg_info, M_DEVBUF); 437250199Sgrehan 438250199Sgrehan return (ret); 439250199Sgrehan} 440250199Sgrehan 441250199Sgrehan/** 442250199Sgrehan * @brief Teardown the specified GPADL handle 443250199Sgrehan */ 444250199Sgrehanint 445250199Sgrehanhv_vmbus_channel_teardown_gpdal( 446250199Sgrehan hv_vmbus_channel* channel, 447250199Sgrehan uint32_t gpadl_handle) 448250199Sgrehan{ 449250199Sgrehan int ret = 0; 450250199Sgrehan hv_vmbus_channel_gpadl_teardown* msg; 451250199Sgrehan hv_vmbus_channel_msg_info* info; 452250199Sgrehan 453250199Sgrehan info = (hv_vmbus_channel_msg_info *) 454250199Sgrehan malloc( sizeof(hv_vmbus_channel_msg_info) + 455250199Sgrehan sizeof(hv_vmbus_channel_gpadl_teardown), 456250199Sgrehan M_DEVBUF, M_NOWAIT); 457250199Sgrehan KASSERT(info != NULL, 458250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl Teardown Msg!")); 459250199Sgrehan if (info == NULL) { 460250199Sgrehan ret = ENOMEM; 461250199Sgrehan goto cleanup; 462250199Sgrehan } 463250199Sgrehan 464250199Sgrehan sema_init(&info->wait_sema, 0, "Open Info Sema"); 465250199Sgrehan 466250199Sgrehan msg = (hv_vmbus_channel_gpadl_teardown*) info->msg; 467250199Sgrehan 468250199Sgrehan msg->header.message_type = HV_CHANNEL_MESSAGE_GPADL_TEARDOWN; 469250199Sgrehan msg->child_rel_id = channel->offer_msg.child_rel_id; 470250199Sgrehan msg->gpadl = gpadl_handle; 471250199Sgrehan 472250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 473250199Sgrehan TAILQ_INSERT_TAIL(&hv_vmbus_g_connection.channel_msg_anchor, 474250199Sgrehan info, msg_list_entry); 475250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 476250199Sgrehan 477250199Sgrehan ret = hv_vmbus_post_message(msg, 478250199Sgrehan sizeof(hv_vmbus_channel_gpadl_teardown)); 479250199Sgrehan if (ret != 0) 480250199Sgrehan goto cleanup; 481250199Sgrehan 482250199Sgrehan ret = sema_timedwait(&info->wait_sema, 500); /* KYS 5 seconds */ 483250199Sgrehan 484250199Sgrehancleanup: 485250199Sgrehan /* 486250199Sgrehan * Received a torndown response 487250199Sgrehan */ 488250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 489250199Sgrehan TAILQ_REMOVE(&hv_vmbus_g_connection.channel_msg_anchor, 490250199Sgrehan info, msg_list_entry); 491250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 492250199Sgrehan sema_destroy(&info->wait_sema); 493250199Sgrehan free(info, M_DEVBUF); 494250199Sgrehan 495250199Sgrehan return (ret); 496250199Sgrehan} 497250199Sgrehan 498250199Sgrehan/** 499250199Sgrehan * @brief Close the specified channel 500250199Sgrehan */ 501250199Sgrehanvoid 502250199Sgrehanhv_vmbus_channel_close(hv_vmbus_channel *channel) 503250199Sgrehan{ 504250199Sgrehan int ret = 0; 505250199Sgrehan hv_vmbus_channel_close_channel* msg; 506250199Sgrehan hv_vmbus_channel_msg_info* info; 507250199Sgrehan 508250199Sgrehan mtx_lock(&channel->inbound_lock); 509250199Sgrehan channel->on_channel_callback = NULL; 510250199Sgrehan mtx_unlock(&channel->inbound_lock); 511250199Sgrehan 512250199Sgrehan /** 513250199Sgrehan * Send a closing message 514250199Sgrehan */ 515250199Sgrehan info = (hv_vmbus_channel_msg_info *) 516250199Sgrehan malloc( sizeof(hv_vmbus_channel_msg_info) + 517250199Sgrehan sizeof(hv_vmbus_channel_close_channel), 518250199Sgrehan M_DEVBUF, M_NOWAIT); 519250199Sgrehan KASSERT(info != NULL, ("VMBUS: malloc failed hv_vmbus_channel_close!")); 520250199Sgrehan if(info == NULL) 521250199Sgrehan return; 522250199Sgrehan 523250199Sgrehan msg = (hv_vmbus_channel_close_channel*) info->msg; 524250199Sgrehan msg->header.message_type = HV_CHANNEL_MESSAGE_CLOSE_CHANNEL; 525250199Sgrehan msg->child_rel_id = channel->offer_msg.child_rel_id; 526250199Sgrehan 527250199Sgrehan ret = hv_vmbus_post_message( 528250199Sgrehan msg, sizeof(hv_vmbus_channel_close_channel)); 529250199Sgrehan 530250199Sgrehan /* Tear down the gpadl for the channel's ring buffer */ 531250199Sgrehan if (channel->ring_buffer_gpadl_handle) { 532250199Sgrehan hv_vmbus_channel_teardown_gpdal(channel, 533250199Sgrehan channel->ring_buffer_gpadl_handle); 534250199Sgrehan } 535250199Sgrehan 536250199Sgrehan /* TODO: Send a msg to release the childRelId */ 537250199Sgrehan 538250199Sgrehan /* cleanup the ring buffers for this channel */ 539250199Sgrehan hv_ring_buffer_cleanup(&channel->outbound); 540250199Sgrehan hv_ring_buffer_cleanup(&channel->inbound); 541250199Sgrehan 542250199Sgrehan contigfree( 543250199Sgrehan channel->ring_buffer_pages, 544250199Sgrehan channel->ring_buffer_page_count, 545250199Sgrehan M_DEVBUF); 546250199Sgrehan 547250199Sgrehan free(info, M_DEVBUF); 548250199Sgrehan 549250199Sgrehan /* 550250199Sgrehan * If we are closing the channel during an error path in 551250199Sgrehan * opening the channel, don't free the channel 552250199Sgrehan * since the caller will free the channel 553250199Sgrehan */ 554250199Sgrehan if (channel->state == HV_CHANNEL_OPEN_STATE) { 555250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_lock); 556250199Sgrehan TAILQ_REMOVE( 557250199Sgrehan &hv_vmbus_g_connection.channel_anchor, 558250199Sgrehan channel, 559250199Sgrehan list_entry); 560250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_lock); 561250199Sgrehan 562250199Sgrehan hv_vmbus_free_vmbus_channel(channel); 563250199Sgrehan } 564250199Sgrehan 565250199Sgrehan} 566250199Sgrehan 567250199Sgrehan/** 568250199Sgrehan * @brief Send the specified buffer on the given channel 569250199Sgrehan */ 570250199Sgrehanint 571250199Sgrehanhv_vmbus_channel_send_packet( 572250199Sgrehan hv_vmbus_channel* channel, 573250199Sgrehan void* buffer, 574250199Sgrehan uint32_t buffer_len, 575250199Sgrehan uint64_t request_id, 576250199Sgrehan hv_vmbus_packet_type type, 577250199Sgrehan uint32_t flags) 578250199Sgrehan{ 579250199Sgrehan int ret = 0; 580250199Sgrehan hv_vm_packet_descriptor desc; 581250199Sgrehan uint32_t packet_len; 582250199Sgrehan uint64_t aligned_data; 583250199Sgrehan uint32_t packet_len_aligned; 584250199Sgrehan hv_vmbus_sg_buffer_list buffer_list[3]; 585250199Sgrehan 586250199Sgrehan packet_len = sizeof(hv_vm_packet_descriptor) + buffer_len; 587250199Sgrehan packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 588250199Sgrehan aligned_data = 0; 589250199Sgrehan 590250199Sgrehan /* Setup the descriptor */ 591250199Sgrehan desc.type = type; /* HV_VMBUS_PACKET_TYPE_DATA_IN_BAND; */ 592250199Sgrehan desc.flags = flags; /* HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED */ 593250199Sgrehan /* in 8-bytes granularity */ 594250199Sgrehan desc.data_offset8 = sizeof(hv_vm_packet_descriptor) >> 3; 595250199Sgrehan desc.length8 = (uint16_t) (packet_len_aligned >> 3); 596250199Sgrehan desc.transaction_id = request_id; 597250199Sgrehan 598250199Sgrehan buffer_list[0].data = &desc; 599250199Sgrehan buffer_list[0].length = sizeof(hv_vm_packet_descriptor); 600250199Sgrehan 601250199Sgrehan buffer_list[1].data = buffer; 602250199Sgrehan buffer_list[1].length = buffer_len; 603250199Sgrehan 604250199Sgrehan buffer_list[2].data = &aligned_data; 605250199Sgrehan buffer_list[2].length = packet_len_aligned - packet_len; 606250199Sgrehan 607250199Sgrehan ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3); 608250199Sgrehan 609250199Sgrehan /* TODO: We should determine if this is optional */ 610250199Sgrehan if (ret == 0 611250199Sgrehan && !hv_vmbus_get_ring_buffer_interrupt_mask( 612250199Sgrehan &channel->outbound)) { 613250199Sgrehan vmbus_channel_set_event(channel); 614250199Sgrehan } 615250199Sgrehan 616250199Sgrehan return (ret); 617250199Sgrehan} 618250199Sgrehan 619250199Sgrehan/** 620250199Sgrehan * @brief Send a range of single-page buffer packets using 621250199Sgrehan * a GPADL Direct packet type 622250199Sgrehan */ 623250199Sgrehanint 624250199Sgrehanhv_vmbus_channel_send_packet_pagebuffer( 625250199Sgrehan hv_vmbus_channel* channel, 626250199Sgrehan hv_vmbus_page_buffer page_buffers[], 627250199Sgrehan uint32_t page_count, 628250199Sgrehan void* buffer, 629250199Sgrehan uint32_t buffer_len, 630250199Sgrehan uint64_t request_id) 631250199Sgrehan{ 632250199Sgrehan 633250199Sgrehan int ret = 0; 634250199Sgrehan int i = 0; 635250199Sgrehan uint32_t packet_len; 636250199Sgrehan uint32_t packetLen_aligned; 637250199Sgrehan hv_vmbus_sg_buffer_list buffer_list[3]; 638250199Sgrehan hv_vmbus_channel_packet_page_buffer desc; 639250199Sgrehan uint32_t descSize; 640250199Sgrehan uint64_t alignedData = 0; 641250199Sgrehan 642250199Sgrehan if (page_count > HV_MAX_PAGE_BUFFER_COUNT) 643250199Sgrehan return (EINVAL); 644250199Sgrehan 645250199Sgrehan /* 646250199Sgrehan * Adjust the size down since hv_vmbus_channel_packet_page_buffer 647250199Sgrehan * is the largest size we support 648250199Sgrehan */ 649250199Sgrehan descSize = sizeof(hv_vmbus_channel_packet_page_buffer) - 650250199Sgrehan ((HV_MAX_PAGE_BUFFER_COUNT - page_count) * 651250199Sgrehan sizeof(hv_vmbus_page_buffer)); 652250199Sgrehan packet_len = descSize + buffer_len; 653250199Sgrehan packetLen_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 654250199Sgrehan 655250199Sgrehan /* Setup the descriptor */ 656250199Sgrehan desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 657250199Sgrehan desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 658250199Sgrehan desc.data_offset8 = descSize >> 3; /* in 8-bytes granularity */ 659250199Sgrehan desc.length8 = (uint16_t) (packetLen_aligned >> 3); 660250199Sgrehan desc.transaction_id = request_id; 661250199Sgrehan desc.range_count = page_count; 662250199Sgrehan 663250199Sgrehan for (i = 0; i < page_count; i++) { 664250199Sgrehan desc.range[i].length = page_buffers[i].length; 665250199Sgrehan desc.range[i].offset = page_buffers[i].offset; 666250199Sgrehan desc.range[i].pfn = page_buffers[i].pfn; 667250199Sgrehan } 668250199Sgrehan 669250199Sgrehan buffer_list[0].data = &desc; 670250199Sgrehan buffer_list[0].length = descSize; 671250199Sgrehan 672250199Sgrehan buffer_list[1].data = buffer; 673250199Sgrehan buffer_list[1].length = buffer_len; 674250199Sgrehan 675250199Sgrehan buffer_list[2].data = &alignedData; 676250199Sgrehan buffer_list[2].length = packetLen_aligned - packet_len; 677250199Sgrehan 678250199Sgrehan ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3); 679250199Sgrehan 680250199Sgrehan /* TODO: We should determine if this is optional */ 681250199Sgrehan if (ret == 0 && 682250199Sgrehan !hv_vmbus_get_ring_buffer_interrupt_mask(&channel->outbound)) { 683250199Sgrehan vmbus_channel_set_event(channel); 684250199Sgrehan } 685250199Sgrehan 686250199Sgrehan return (ret); 687250199Sgrehan} 688250199Sgrehan 689250199Sgrehan/** 690250199Sgrehan * @brief Send a multi-page buffer packet using a GPADL Direct packet type 691250199Sgrehan */ 692250199Sgrehanint 693250199Sgrehanhv_vmbus_channel_send_packet_multipagebuffer( 694250199Sgrehan hv_vmbus_channel* channel, 695250199Sgrehan hv_vmbus_multipage_buffer* multi_page_buffer, 696250199Sgrehan void* buffer, 697250199Sgrehan uint32_t buffer_len, 698250199Sgrehan uint64_t request_id) 699250199Sgrehan{ 700250199Sgrehan 701250199Sgrehan int ret = 0; 702250199Sgrehan uint32_t desc_size; 703250199Sgrehan uint32_t packet_len; 704250199Sgrehan uint32_t packet_len_aligned; 705250199Sgrehan uint32_t pfn_count; 706250199Sgrehan uint64_t aligned_data = 0; 707250199Sgrehan hv_vmbus_sg_buffer_list buffer_list[3]; 708250199Sgrehan hv_vmbus_channel_packet_multipage_buffer desc; 709250199Sgrehan 710250199Sgrehan pfn_count = 711250199Sgrehan HV_NUM_PAGES_SPANNED( 712250199Sgrehan multi_page_buffer->offset, 713250199Sgrehan multi_page_buffer->length); 714250199Sgrehan 715250199Sgrehan if ((pfn_count == 0) || (pfn_count > HV_MAX_MULTIPAGE_BUFFER_COUNT)) 716250199Sgrehan return (EINVAL); 717250199Sgrehan /* 718250199Sgrehan * Adjust the size down since hv_vmbus_channel_packet_multipage_buffer 719250199Sgrehan * is the largest size we support 720250199Sgrehan */ 721250199Sgrehan desc_size = 722250199Sgrehan sizeof(hv_vmbus_channel_packet_multipage_buffer) - 723250199Sgrehan ((HV_MAX_MULTIPAGE_BUFFER_COUNT - pfn_count) * 724250199Sgrehan sizeof(uint64_t)); 725250199Sgrehan packet_len = desc_size + buffer_len; 726250199Sgrehan packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 727250199Sgrehan 728250199Sgrehan /* 729250199Sgrehan * Setup the descriptor 730250199Sgrehan */ 731250199Sgrehan desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 732250199Sgrehan desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 733250199Sgrehan desc.data_offset8 = desc_size >> 3; /* in 8-bytes granularity */ 734250199Sgrehan desc.length8 = (uint16_t) (packet_len_aligned >> 3); 735250199Sgrehan desc.transaction_id = request_id; 736250199Sgrehan desc.range_count = 1; 737250199Sgrehan 738250199Sgrehan desc.range.length = multi_page_buffer->length; 739250199Sgrehan desc.range.offset = multi_page_buffer->offset; 740250199Sgrehan 741250199Sgrehan memcpy(desc.range.pfn_array, multi_page_buffer->pfn_array, 742250199Sgrehan pfn_count * sizeof(uint64_t)); 743250199Sgrehan 744250199Sgrehan buffer_list[0].data = &desc; 745250199Sgrehan buffer_list[0].length = desc_size; 746250199Sgrehan 747250199Sgrehan buffer_list[1].data = buffer; 748250199Sgrehan buffer_list[1].length = buffer_len; 749250199Sgrehan 750250199Sgrehan buffer_list[2].data = &aligned_data; 751250199Sgrehan buffer_list[2].length = packet_len_aligned - packet_len; 752250199Sgrehan 753250199Sgrehan ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3); 754250199Sgrehan 755250199Sgrehan /* TODO: We should determine if this is optional */ 756250199Sgrehan if (ret == 0 && 757250199Sgrehan !hv_vmbus_get_ring_buffer_interrupt_mask(&channel->outbound)) { 758250199Sgrehan vmbus_channel_set_event(channel); 759250199Sgrehan } 760250199Sgrehan 761250199Sgrehan return (ret); 762250199Sgrehan} 763250199Sgrehan 764250199Sgrehan/** 765250199Sgrehan * @brief Retrieve the user packet on the specified channel 766250199Sgrehan */ 767250199Sgrehanint 768250199Sgrehanhv_vmbus_channel_recv_packet( 769250199Sgrehan hv_vmbus_channel* channel, 770250199Sgrehan void* Buffer, 771250199Sgrehan uint32_t buffer_len, 772250199Sgrehan uint32_t* buffer_actual_len, 773250199Sgrehan uint64_t* request_id) 774250199Sgrehan{ 775250199Sgrehan int ret; 776250199Sgrehan uint32_t user_len; 777250199Sgrehan uint32_t packet_len; 778250199Sgrehan hv_vm_packet_descriptor desc; 779250199Sgrehan 780250199Sgrehan *buffer_actual_len = 0; 781250199Sgrehan *request_id = 0; 782250199Sgrehan 783250199Sgrehan ret = hv_ring_buffer_peek(&channel->inbound, &desc, 784250199Sgrehan sizeof(hv_vm_packet_descriptor)); 785250199Sgrehan if (ret != 0) 786250199Sgrehan return (0); 787250199Sgrehan 788250199Sgrehan packet_len = desc.length8 << 3; 789250199Sgrehan user_len = packet_len - (desc.data_offset8 << 3); 790250199Sgrehan 791250199Sgrehan *buffer_actual_len = user_len; 792250199Sgrehan 793250199Sgrehan if (user_len > buffer_len) 794250199Sgrehan return (EINVAL); 795250199Sgrehan 796250199Sgrehan *request_id = desc.transaction_id; 797250199Sgrehan 798250199Sgrehan /* Copy over the packet to the user buffer */ 799250199Sgrehan ret = hv_ring_buffer_read(&channel->inbound, Buffer, user_len, 800250199Sgrehan (desc.data_offset8 << 3)); 801250199Sgrehan 802250199Sgrehan return (0); 803250199Sgrehan} 804250199Sgrehan 805250199Sgrehan/** 806250199Sgrehan * @brief Retrieve the raw packet on the specified channel 807250199Sgrehan */ 808250199Sgrehanint 809250199Sgrehanhv_vmbus_channel_recv_packet_raw( 810250199Sgrehan hv_vmbus_channel* channel, 811250199Sgrehan void* buffer, 812250199Sgrehan uint32_t buffer_len, 813250199Sgrehan uint32_t* buffer_actual_len, 814250199Sgrehan uint64_t* request_id) 815250199Sgrehan{ 816250199Sgrehan int ret; 817250199Sgrehan uint32_t packetLen; 818250199Sgrehan uint32_t userLen; 819250199Sgrehan hv_vm_packet_descriptor desc; 820250199Sgrehan 821250199Sgrehan *buffer_actual_len = 0; 822250199Sgrehan *request_id = 0; 823250199Sgrehan 824250199Sgrehan ret = hv_ring_buffer_peek( 825250199Sgrehan &channel->inbound, &desc, 826250199Sgrehan sizeof(hv_vm_packet_descriptor)); 827250199Sgrehan 828250199Sgrehan if (ret != 0) 829250199Sgrehan return (0); 830250199Sgrehan 831250199Sgrehan packetLen = desc.length8 << 3; 832250199Sgrehan userLen = packetLen - (desc.data_offset8 << 3); 833250199Sgrehan 834250199Sgrehan *buffer_actual_len = packetLen; 835250199Sgrehan 836250199Sgrehan if (packetLen > buffer_len) 837250199Sgrehan return (ENOBUFS); 838250199Sgrehan 839250199Sgrehan *request_id = desc.transaction_id; 840250199Sgrehan 841250199Sgrehan /* Copy over the entire packet to the user buffer */ 842250199Sgrehan ret = hv_ring_buffer_read(&channel->inbound, buffer, packetLen, 0); 843250199Sgrehan 844250199Sgrehan return (0); 845250199Sgrehan} 846