vmbus_chan.c revision 250199
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 29250199Sgrehan#include <sys/param.h> 30250199Sgrehan#include <sys/malloc.h> 31250199Sgrehan#include <sys/systm.h> 32250199Sgrehan#include <sys/mbuf.h> 33250199Sgrehan#include <sys/lock.h> 34250199Sgrehan#include <sys/mutex.h> 35250199Sgrehan#include <machine/bus.h> 36250199Sgrehan#include <vm/vm.h> 37250199Sgrehan#include <vm/vm_param.h> 38250199Sgrehan#include <vm/pmap.h> 39250199Sgrehan 40250199Sgrehan#include "hv_vmbus_priv.h" 41250199Sgrehan 42250199Sgrehanstatic int vmbus_channel_create_gpadl_header( 43250199Sgrehan /* must be phys and virt contiguous*/ 44250199Sgrehan void* contig_buffer, 45250199Sgrehan /* page-size multiple */ 46250199Sgrehan uint32_t size, 47250199Sgrehan hv_vmbus_channel_msg_info** msg_info, 48250199Sgrehan uint32_t* message_count); 49250199Sgrehan 50250199Sgrehanstatic void vmbus_channel_set_event(hv_vmbus_channel* channel); 51250199Sgrehan 52250199Sgrehan/** 53250199Sgrehan * @brief Trigger an event notification on the specified channel 54250199Sgrehan */ 55250199Sgrehanstatic void 56250199Sgrehanvmbus_channel_set_event(hv_vmbus_channel *channel) 57250199Sgrehan{ 58250199Sgrehan hv_vmbus_monitor_page *monitor_page; 59250199Sgrehan 60250199Sgrehan if (channel->offer_msg.monitor_allocated) { 61250199Sgrehan /* Each uint32_t represents 32 channels */ 62250199Sgrehan synch_set_bit((channel->offer_msg.child_rel_id & 31), 63250199Sgrehan ((uint32_t *)hv_vmbus_g_connection.send_interrupt_page 64250199Sgrehan + ((channel->offer_msg.child_rel_id >> 5)))); 65250199Sgrehan 66250199Sgrehan monitor_page = (hv_vmbus_monitor_page *) 67250199Sgrehan hv_vmbus_g_connection.monitor_pages; 68250199Sgrehan 69250199Sgrehan monitor_page++; /* Get the child to parent monitor page */ 70250199Sgrehan 71250199Sgrehan synch_set_bit(channel->monitor_bit, 72250199Sgrehan (uint32_t *)&monitor_page-> 73250199Sgrehan trigger_group[channel->monitor_group].pending); 74250199Sgrehan } else { 75250199Sgrehan hv_vmbus_set_event(channel->offer_msg.child_rel_id); 76250199Sgrehan } 77250199Sgrehan 78250199Sgrehan} 79250199Sgrehan 80250199Sgrehan/** 81250199Sgrehan * @brief Open the specified channel 82250199Sgrehan */ 83250199Sgrehanint 84250199Sgrehanhv_vmbus_channel_open( 85250199Sgrehan hv_vmbus_channel* new_channel, 86250199Sgrehan uint32_t send_ring_buffer_size, 87250199Sgrehan uint32_t recv_ring_buffer_size, 88250199Sgrehan void* user_data, 89250199Sgrehan uint32_t user_data_len, 90250199Sgrehan hv_vmbus_pfn_channel_callback pfn_on_channel_callback, 91250199Sgrehan void* context) 92250199Sgrehan{ 93250199Sgrehan 94250199Sgrehan int ret = 0; 95250199Sgrehan void *in, *out; 96250199Sgrehan hv_vmbus_channel_open_channel* open_msg; 97250199Sgrehan hv_vmbus_channel_msg_info* open_info; 98250199Sgrehan 99250199Sgrehan new_channel->on_channel_callback = pfn_on_channel_callback; 100250199Sgrehan new_channel->channel_callback_context = context; 101250199Sgrehan 102250199Sgrehan /* Allocate the ring buffer */ 103250199Sgrehan out = contigmalloc((send_ring_buffer_size + recv_ring_buffer_size), 104250199Sgrehan M_DEVBUF, M_ZERO, 0UL, BUS_SPACE_MAXADDR, PAGE_SIZE, 0); 105250199Sgrehan KASSERT(out != NULL, 106250199Sgrehan ("Error VMBUS: contigmalloc failed to allocate Ring Buffer!")); 107250199Sgrehan if (out == NULL) 108250199Sgrehan return (ENOMEM); 109250199Sgrehan 110250199Sgrehan in = ((uint8_t *) out + send_ring_buffer_size); 111250199Sgrehan 112250199Sgrehan new_channel->ring_buffer_pages = out; 113250199Sgrehan new_channel->ring_buffer_page_count = (send_ring_buffer_size 114250199Sgrehan + recv_ring_buffer_size) >> PAGE_SHIFT; 115250199Sgrehan 116250199Sgrehan hv_vmbus_ring_buffer_init( 117250199Sgrehan &new_channel->outbound, 118250199Sgrehan out, 119250199Sgrehan send_ring_buffer_size); 120250199Sgrehan 121250199Sgrehan hv_vmbus_ring_buffer_init( 122250199Sgrehan &new_channel->inbound, 123250199Sgrehan in, 124250199Sgrehan recv_ring_buffer_size); 125250199Sgrehan 126250199Sgrehan /** 127250199Sgrehan * Establish the gpadl for the ring buffer 128250199Sgrehan */ 129250199Sgrehan new_channel->ring_buffer_gpadl_handle = 0; 130250199Sgrehan 131250199Sgrehan ret = hv_vmbus_channel_establish_gpadl(new_channel, 132250199Sgrehan new_channel->outbound.ring_buffer, 133250199Sgrehan send_ring_buffer_size + recv_ring_buffer_size, 134250199Sgrehan &new_channel->ring_buffer_gpadl_handle); 135250199Sgrehan 136250199Sgrehan /** 137250199Sgrehan * Create and init the channel open message 138250199Sgrehan */ 139250199Sgrehan open_info = (hv_vmbus_channel_msg_info*) malloc( 140250199Sgrehan sizeof(hv_vmbus_channel_msg_info) + 141250199Sgrehan sizeof(hv_vmbus_channel_open_channel), 142250199Sgrehan M_DEVBUF, 143250199Sgrehan M_NOWAIT); 144250199Sgrehan KASSERT(open_info != NULL, 145250199Sgrehan ("Error VMBUS: malloc failed to allocate Open Channel message!")); 146250199Sgrehan 147250199Sgrehan if (open_info == NULL) 148250199Sgrehan return (ENOMEM); 149250199Sgrehan 150250199Sgrehan sema_init(&open_info->wait_sema, 0, "Open Info Sema"); 151250199Sgrehan 152250199Sgrehan open_msg = (hv_vmbus_channel_open_channel*) open_info->msg; 153250199Sgrehan open_msg->header.message_type = HV_CHANNEL_MESSAGE_OPEN_CHANNEL; 154250199Sgrehan open_msg->open_id = new_channel->offer_msg.child_rel_id; 155250199Sgrehan open_msg->child_rel_id = new_channel->offer_msg.child_rel_id; 156250199Sgrehan open_msg->ring_buffer_gpadl_handle = 157250199Sgrehan new_channel->ring_buffer_gpadl_handle; 158250199Sgrehan open_msg->downstream_ring_buffer_page_offset = send_ring_buffer_size 159250199Sgrehan >> PAGE_SHIFT; 160250199Sgrehan open_msg->server_context_area_gpadl_handle = 0; 161250199Sgrehan 162250199Sgrehan if (user_data_len) 163250199Sgrehan memcpy(open_msg->user_data, user_data, user_data_len); 164250199Sgrehan 165250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 166250199Sgrehan TAILQ_INSERT_TAIL( 167250199Sgrehan &hv_vmbus_g_connection.channel_msg_anchor, 168250199Sgrehan open_info, 169250199Sgrehan msg_list_entry); 170250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 171250199Sgrehan 172250199Sgrehan ret = hv_vmbus_post_message( 173250199Sgrehan open_msg, sizeof(hv_vmbus_channel_open_channel)); 174250199Sgrehan 175250199Sgrehan if (ret != 0) 176250199Sgrehan goto cleanup; 177250199Sgrehan 178250199Sgrehan ret = sema_timedwait(&open_info->wait_sema, 500); /* KYS 5 seconds */ 179250199Sgrehan 180250199Sgrehan if (ret) 181250199Sgrehan goto cleanup; 182250199Sgrehan 183250199Sgrehan if (open_info->response.open_result.status == 0) { 184250199Sgrehan if(bootverbose) 185250199Sgrehan printf("VMBUS: channel <%p> open success.\n", new_channel); 186250199Sgrehan } else { 187250199Sgrehan if(bootverbose) 188250199Sgrehan printf("Error VMBUS: channel <%p> open failed - %d!\n", 189250199Sgrehan new_channel, open_info->response.open_result.status); 190250199Sgrehan } 191250199Sgrehan 192250199Sgrehan cleanup: 193250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 194250199Sgrehan TAILQ_REMOVE( 195250199Sgrehan &hv_vmbus_g_connection.channel_msg_anchor, 196250199Sgrehan open_info, 197250199Sgrehan msg_list_entry); 198250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 199250199Sgrehan sema_destroy(&open_info->wait_sema); 200250199Sgrehan free(open_info, M_DEVBUF); 201250199Sgrehan 202250199Sgrehan return (ret); 203250199Sgrehan} 204250199Sgrehan 205250199Sgrehan/** 206250199Sgrehan * @brief Create a gpadl for the specified buffer 207250199Sgrehan */ 208250199Sgrehanstatic int 209250199Sgrehanvmbus_channel_create_gpadl_header( 210250199Sgrehan void* contig_buffer, 211250199Sgrehan uint32_t size, /* page-size multiple */ 212250199Sgrehan hv_vmbus_channel_msg_info** msg_info, 213250199Sgrehan uint32_t* message_count) 214250199Sgrehan{ 215250199Sgrehan int i; 216250199Sgrehan int page_count; 217250199Sgrehan unsigned long long pfn; 218250199Sgrehan uint32_t msg_size; 219250199Sgrehan hv_vmbus_channel_gpadl_header* gpa_header; 220250199Sgrehan hv_vmbus_channel_gpadl_body* gpadl_body; 221250199Sgrehan hv_vmbus_channel_msg_info* msg_header; 222250199Sgrehan hv_vmbus_channel_msg_info* msg_body; 223250199Sgrehan 224250199Sgrehan int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; 225250199Sgrehan 226250199Sgrehan page_count = size >> PAGE_SHIFT; 227250199Sgrehan pfn = hv_get_phys_addr(contig_buffer) >> PAGE_SHIFT; 228250199Sgrehan 229250199Sgrehan /*do we need a gpadl body msg */ 230250199Sgrehan pfnSize = HV_MAX_SIZE_CHANNEL_MESSAGE 231250199Sgrehan - sizeof(hv_vmbus_channel_gpadl_header) 232250199Sgrehan - sizeof(hv_gpa_range); 233250199Sgrehan pfnCount = pfnSize / sizeof(uint64_t); 234250199Sgrehan 235250199Sgrehan if (page_count > pfnCount) { /* if(we need a gpadl body) */ 236250199Sgrehan /* fill in the header */ 237250199Sgrehan msg_size = sizeof(hv_vmbus_channel_msg_info) 238250199Sgrehan + sizeof(hv_vmbus_channel_gpadl_header) 239250199Sgrehan + sizeof(hv_gpa_range) 240250199Sgrehan + pfnCount * sizeof(uint64_t); 241250199Sgrehan msg_header = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 242250199Sgrehan KASSERT( 243250199Sgrehan msg_header != NULL, 244250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl Message!")); 245250199Sgrehan if (msg_header == NULL) 246250199Sgrehan return (ENOMEM); 247250199Sgrehan 248250199Sgrehan TAILQ_INIT(&msg_header->sub_msg_list_anchor); 249250199Sgrehan msg_header->message_size = msg_size; 250250199Sgrehan 251250199Sgrehan gpa_header = (hv_vmbus_channel_gpadl_header*) msg_header->msg; 252250199Sgrehan gpa_header->range_count = 1; 253250199Sgrehan gpa_header->range_buf_len = sizeof(hv_gpa_range) 254250199Sgrehan + page_count * sizeof(uint64_t); 255250199Sgrehan gpa_header->range[0].byte_offset = 0; 256250199Sgrehan gpa_header->range[0].byte_count = size; 257250199Sgrehan for (i = 0; i < pfnCount; i++) { 258250199Sgrehan gpa_header->range[0].pfn_array[i] = pfn + i; 259250199Sgrehan } 260250199Sgrehan *msg_info = msg_header; 261250199Sgrehan *message_count = 1; 262250199Sgrehan 263250199Sgrehan pfnSum = pfnCount; 264250199Sgrehan pfnLeft = page_count - pfnCount; 265250199Sgrehan 266250199Sgrehan /* 267250199Sgrehan * figure out how many pfns we can fit 268250199Sgrehan */ 269250199Sgrehan pfnSize = HV_MAX_SIZE_CHANNEL_MESSAGE 270250199Sgrehan - sizeof(hv_vmbus_channel_gpadl_body); 271250199Sgrehan pfnCount = pfnSize / sizeof(uint64_t); 272250199Sgrehan 273250199Sgrehan /* 274250199Sgrehan * fill in the body 275250199Sgrehan */ 276250199Sgrehan while (pfnLeft) { 277250199Sgrehan if (pfnLeft > pfnCount) { 278250199Sgrehan pfnCurr = pfnCount; 279250199Sgrehan } else { 280250199Sgrehan pfnCurr = pfnLeft; 281250199Sgrehan } 282250199Sgrehan 283250199Sgrehan msg_size = sizeof(hv_vmbus_channel_msg_info) + 284250199Sgrehan sizeof(hv_vmbus_channel_gpadl_body) + 285250199Sgrehan pfnCurr * sizeof(uint64_t); 286250199Sgrehan msg_body = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 287250199Sgrehan KASSERT( 288250199Sgrehan msg_body != NULL, 289250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl msg_body!")); 290250199Sgrehan if (msg_body == NULL) 291250199Sgrehan return (ENOMEM); 292250199Sgrehan 293250199Sgrehan msg_body->message_size = msg_size; 294250199Sgrehan (*message_count)++; 295250199Sgrehan gpadl_body = 296250199Sgrehan (hv_vmbus_channel_gpadl_body*) msg_body->msg; 297250199Sgrehan /* 298250199Sgrehan * gpadl_body->gpadl = kbuffer; 299250199Sgrehan */ 300250199Sgrehan for (i = 0; i < pfnCurr; i++) { 301250199Sgrehan gpadl_body->pfn[i] = pfn + pfnSum + i; 302250199Sgrehan } 303250199Sgrehan 304250199Sgrehan TAILQ_INSERT_TAIL( 305250199Sgrehan &msg_header->sub_msg_list_anchor, 306250199Sgrehan msg_body, 307250199Sgrehan msg_list_entry); 308250199Sgrehan pfnSum += pfnCurr; 309250199Sgrehan pfnLeft -= pfnCurr; 310250199Sgrehan } 311250199Sgrehan } else { /* else everything fits in a header */ 312250199Sgrehan 313250199Sgrehan msg_size = sizeof(hv_vmbus_channel_msg_info) + 314250199Sgrehan sizeof(hv_vmbus_channel_gpadl_header) + 315250199Sgrehan sizeof(hv_gpa_range) + 316250199Sgrehan page_count * sizeof(uint64_t); 317250199Sgrehan msg_header = malloc(msg_size, M_DEVBUF, M_NOWAIT | M_ZERO); 318250199Sgrehan KASSERT( 319250199Sgrehan msg_header != NULL, 320250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl Message!")); 321250199Sgrehan if (msg_header == NULL) 322250199Sgrehan return (ENOMEM); 323250199Sgrehan 324250199Sgrehan msg_header->message_size = msg_size; 325250199Sgrehan 326250199Sgrehan gpa_header = (hv_vmbus_channel_gpadl_header*) msg_header->msg; 327250199Sgrehan gpa_header->range_count = 1; 328250199Sgrehan gpa_header->range_buf_len = sizeof(hv_gpa_range) + 329250199Sgrehan page_count * sizeof(uint64_t); 330250199Sgrehan gpa_header->range[0].byte_offset = 0; 331250199Sgrehan gpa_header->range[0].byte_count = size; 332250199Sgrehan for (i = 0; i < page_count; i++) { 333250199Sgrehan gpa_header->range[0].pfn_array[i] = pfn + i; 334250199Sgrehan } 335250199Sgrehan 336250199Sgrehan *msg_info = msg_header; 337250199Sgrehan *message_count = 1; 338250199Sgrehan } 339250199Sgrehan 340250199Sgrehan return (0); 341250199Sgrehan} 342250199Sgrehan 343250199Sgrehan/** 344250199Sgrehan * @brief Establish a GPADL for the specified buffer 345250199Sgrehan */ 346250199Sgrehanint 347250199Sgrehanhv_vmbus_channel_establish_gpadl( 348250199Sgrehan hv_vmbus_channel* channel, 349250199Sgrehan void* contig_buffer, 350250199Sgrehan uint32_t size, /* page-size multiple */ 351250199Sgrehan uint32_t* gpadl_handle) 352250199Sgrehan 353250199Sgrehan{ 354250199Sgrehan int ret = 0; 355250199Sgrehan hv_vmbus_channel_gpadl_header* gpadl_msg; 356250199Sgrehan hv_vmbus_channel_gpadl_body* gpadl_body; 357250199Sgrehan hv_vmbus_channel_msg_info* msg_info; 358250199Sgrehan hv_vmbus_channel_msg_info* sub_msg_info; 359250199Sgrehan uint32_t msg_count; 360250199Sgrehan hv_vmbus_channel_msg_info* curr; 361250199Sgrehan uint32_t next_gpadl_handle; 362250199Sgrehan 363250199Sgrehan next_gpadl_handle = hv_vmbus_g_connection.next_gpadl_handle; 364250199Sgrehan atomic_add_int((int*) &hv_vmbus_g_connection.next_gpadl_handle, 1); 365250199Sgrehan 366250199Sgrehan ret = vmbus_channel_create_gpadl_header( 367250199Sgrehan contig_buffer, size, &msg_info, &msg_count); 368250199Sgrehan 369250199Sgrehan if(ret != 0) { /* if(allocation failed) return immediately */ 370250199Sgrehan /* reverse atomic_add_int above */ 371250199Sgrehan atomic_subtract_int((int*) 372250199Sgrehan &hv_vmbus_g_connection.next_gpadl_handle, 1); 373250199Sgrehan return ret; 374250199Sgrehan } 375250199Sgrehan 376250199Sgrehan sema_init(&msg_info->wait_sema, 0, "Open Info Sema"); 377250199Sgrehan gpadl_msg = (hv_vmbus_channel_gpadl_header*) msg_info->msg; 378250199Sgrehan gpadl_msg->header.message_type = HV_CHANNEL_MESSAGEL_GPADL_HEADER; 379250199Sgrehan gpadl_msg->child_rel_id = channel->offer_msg.child_rel_id; 380250199Sgrehan gpadl_msg->gpadl = next_gpadl_handle; 381250199Sgrehan 382250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 383250199Sgrehan TAILQ_INSERT_TAIL( 384250199Sgrehan &hv_vmbus_g_connection.channel_msg_anchor, 385250199Sgrehan msg_info, 386250199Sgrehan msg_list_entry); 387250199Sgrehan 388250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 389250199Sgrehan 390250199Sgrehan ret = hv_vmbus_post_message( 391250199Sgrehan gpadl_msg, 392250199Sgrehan msg_info->message_size - 393250199Sgrehan (uint32_t) sizeof(hv_vmbus_channel_msg_info)); 394250199Sgrehan 395250199Sgrehan if (ret != 0) 396250199Sgrehan goto cleanup; 397250199Sgrehan 398250199Sgrehan if (msg_count > 1) { 399250199Sgrehan TAILQ_FOREACH(curr, 400250199Sgrehan &msg_info->sub_msg_list_anchor, msg_list_entry) { 401250199Sgrehan sub_msg_info = curr; 402250199Sgrehan gpadl_body = 403250199Sgrehan (hv_vmbus_channel_gpadl_body*) sub_msg_info->msg; 404250199Sgrehan 405250199Sgrehan gpadl_body->header.message_type = 406250199Sgrehan HV_CHANNEL_MESSAGE_GPADL_BODY; 407250199Sgrehan gpadl_body->gpadl = next_gpadl_handle; 408250199Sgrehan 409250199Sgrehan ret = hv_vmbus_post_message( 410250199Sgrehan gpadl_body, 411250199Sgrehan sub_msg_info->message_size 412250199Sgrehan - (uint32_t) sizeof(hv_vmbus_channel_msg_info)); 413250199Sgrehan /* if (the post message failed) give up and clean up */ 414250199Sgrehan if(ret != 0) 415250199Sgrehan goto cleanup; 416250199Sgrehan } 417250199Sgrehan } 418250199Sgrehan 419250199Sgrehan ret = sema_timedwait(&msg_info->wait_sema, 500); /* KYS 5 seconds*/ 420250199Sgrehan if (ret != 0) 421250199Sgrehan goto cleanup; 422250199Sgrehan 423250199Sgrehan *gpadl_handle = gpadl_msg->gpadl; 424250199Sgrehan 425250199Sgrehancleanup: 426250199Sgrehan 427250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 428250199Sgrehan TAILQ_REMOVE(&hv_vmbus_g_connection.channel_msg_anchor, 429250199Sgrehan msg_info, msg_list_entry); 430250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 431250199Sgrehan 432250199Sgrehan sema_destroy(&msg_info->wait_sema); 433250199Sgrehan free(msg_info, M_DEVBUF); 434250199Sgrehan 435250199Sgrehan return (ret); 436250199Sgrehan} 437250199Sgrehan 438250199Sgrehan/** 439250199Sgrehan * @brief Teardown the specified GPADL handle 440250199Sgrehan */ 441250199Sgrehanint 442250199Sgrehanhv_vmbus_channel_teardown_gpdal( 443250199Sgrehan hv_vmbus_channel* channel, 444250199Sgrehan uint32_t gpadl_handle) 445250199Sgrehan{ 446250199Sgrehan int ret = 0; 447250199Sgrehan hv_vmbus_channel_gpadl_teardown* msg; 448250199Sgrehan hv_vmbus_channel_msg_info* info; 449250199Sgrehan 450250199Sgrehan info = (hv_vmbus_channel_msg_info *) 451250199Sgrehan malloc( sizeof(hv_vmbus_channel_msg_info) + 452250199Sgrehan sizeof(hv_vmbus_channel_gpadl_teardown), 453250199Sgrehan M_DEVBUF, M_NOWAIT); 454250199Sgrehan KASSERT(info != NULL, 455250199Sgrehan ("Error VMBUS: malloc failed to allocate Gpadl Teardown Msg!")); 456250199Sgrehan if (info == NULL) { 457250199Sgrehan ret = ENOMEM; 458250199Sgrehan goto cleanup; 459250199Sgrehan } 460250199Sgrehan 461250199Sgrehan sema_init(&info->wait_sema, 0, "Open Info Sema"); 462250199Sgrehan 463250199Sgrehan msg = (hv_vmbus_channel_gpadl_teardown*) info->msg; 464250199Sgrehan 465250199Sgrehan msg->header.message_type = HV_CHANNEL_MESSAGE_GPADL_TEARDOWN; 466250199Sgrehan msg->child_rel_id = channel->offer_msg.child_rel_id; 467250199Sgrehan msg->gpadl = gpadl_handle; 468250199Sgrehan 469250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 470250199Sgrehan TAILQ_INSERT_TAIL(&hv_vmbus_g_connection.channel_msg_anchor, 471250199Sgrehan info, msg_list_entry); 472250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 473250199Sgrehan 474250199Sgrehan ret = hv_vmbus_post_message(msg, 475250199Sgrehan sizeof(hv_vmbus_channel_gpadl_teardown)); 476250199Sgrehan if (ret != 0) 477250199Sgrehan goto cleanup; 478250199Sgrehan 479250199Sgrehan ret = sema_timedwait(&info->wait_sema, 500); /* KYS 5 seconds */ 480250199Sgrehan 481250199Sgrehancleanup: 482250199Sgrehan /* 483250199Sgrehan * Received a torndown response 484250199Sgrehan */ 485250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_msg_lock); 486250199Sgrehan TAILQ_REMOVE(&hv_vmbus_g_connection.channel_msg_anchor, 487250199Sgrehan info, msg_list_entry); 488250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_msg_lock); 489250199Sgrehan sema_destroy(&info->wait_sema); 490250199Sgrehan free(info, M_DEVBUF); 491250199Sgrehan 492250199Sgrehan return (ret); 493250199Sgrehan} 494250199Sgrehan 495250199Sgrehan/** 496250199Sgrehan * @brief Close the specified channel 497250199Sgrehan */ 498250199Sgrehanvoid 499250199Sgrehanhv_vmbus_channel_close(hv_vmbus_channel *channel) 500250199Sgrehan{ 501250199Sgrehan int ret = 0; 502250199Sgrehan hv_vmbus_channel_close_channel* msg; 503250199Sgrehan hv_vmbus_channel_msg_info* info; 504250199Sgrehan 505250199Sgrehan mtx_lock(&channel->inbound_lock); 506250199Sgrehan channel->on_channel_callback = NULL; 507250199Sgrehan mtx_unlock(&channel->inbound_lock); 508250199Sgrehan 509250199Sgrehan /** 510250199Sgrehan * Send a closing message 511250199Sgrehan */ 512250199Sgrehan info = (hv_vmbus_channel_msg_info *) 513250199Sgrehan malloc( sizeof(hv_vmbus_channel_msg_info) + 514250199Sgrehan sizeof(hv_vmbus_channel_close_channel), 515250199Sgrehan M_DEVBUF, M_NOWAIT); 516250199Sgrehan KASSERT(info != NULL, ("VMBUS: malloc failed hv_vmbus_channel_close!")); 517250199Sgrehan if(info == NULL) 518250199Sgrehan return; 519250199Sgrehan 520250199Sgrehan msg = (hv_vmbus_channel_close_channel*) info->msg; 521250199Sgrehan msg->header.message_type = HV_CHANNEL_MESSAGE_CLOSE_CHANNEL; 522250199Sgrehan msg->child_rel_id = channel->offer_msg.child_rel_id; 523250199Sgrehan 524250199Sgrehan ret = hv_vmbus_post_message( 525250199Sgrehan msg, sizeof(hv_vmbus_channel_close_channel)); 526250199Sgrehan 527250199Sgrehan /* Tear down the gpadl for the channel's ring buffer */ 528250199Sgrehan if (channel->ring_buffer_gpadl_handle) { 529250199Sgrehan hv_vmbus_channel_teardown_gpdal(channel, 530250199Sgrehan channel->ring_buffer_gpadl_handle); 531250199Sgrehan } 532250199Sgrehan 533250199Sgrehan /* TODO: Send a msg to release the childRelId */ 534250199Sgrehan 535250199Sgrehan /* cleanup the ring buffers for this channel */ 536250199Sgrehan hv_ring_buffer_cleanup(&channel->outbound); 537250199Sgrehan hv_ring_buffer_cleanup(&channel->inbound); 538250199Sgrehan 539250199Sgrehan contigfree( 540250199Sgrehan channel->ring_buffer_pages, 541250199Sgrehan channel->ring_buffer_page_count, 542250199Sgrehan M_DEVBUF); 543250199Sgrehan 544250199Sgrehan free(info, M_DEVBUF); 545250199Sgrehan 546250199Sgrehan /* 547250199Sgrehan * If we are closing the channel during an error path in 548250199Sgrehan * opening the channel, don't free the channel 549250199Sgrehan * since the caller will free the channel 550250199Sgrehan */ 551250199Sgrehan if (channel->state == HV_CHANNEL_OPEN_STATE) { 552250199Sgrehan mtx_lock_spin(&hv_vmbus_g_connection.channel_lock); 553250199Sgrehan TAILQ_REMOVE( 554250199Sgrehan &hv_vmbus_g_connection.channel_anchor, 555250199Sgrehan channel, 556250199Sgrehan list_entry); 557250199Sgrehan mtx_unlock_spin(&hv_vmbus_g_connection.channel_lock); 558250199Sgrehan 559250199Sgrehan hv_vmbus_free_vmbus_channel(channel); 560250199Sgrehan } 561250199Sgrehan 562250199Sgrehan} 563250199Sgrehan 564250199Sgrehan/** 565250199Sgrehan * @brief Send the specified buffer on the given channel 566250199Sgrehan */ 567250199Sgrehanint 568250199Sgrehanhv_vmbus_channel_send_packet( 569250199Sgrehan hv_vmbus_channel* channel, 570250199Sgrehan void* buffer, 571250199Sgrehan uint32_t buffer_len, 572250199Sgrehan uint64_t request_id, 573250199Sgrehan hv_vmbus_packet_type type, 574250199Sgrehan uint32_t flags) 575250199Sgrehan{ 576250199Sgrehan int ret = 0; 577250199Sgrehan hv_vm_packet_descriptor desc; 578250199Sgrehan uint32_t packet_len; 579250199Sgrehan uint64_t aligned_data; 580250199Sgrehan uint32_t packet_len_aligned; 581250199Sgrehan hv_vmbus_sg_buffer_list buffer_list[3]; 582250199Sgrehan 583250199Sgrehan packet_len = sizeof(hv_vm_packet_descriptor) + buffer_len; 584250199Sgrehan packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 585250199Sgrehan aligned_data = 0; 586250199Sgrehan 587250199Sgrehan /* Setup the descriptor */ 588250199Sgrehan desc.type = type; /* HV_VMBUS_PACKET_TYPE_DATA_IN_BAND; */ 589250199Sgrehan desc.flags = flags; /* HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED */ 590250199Sgrehan /* in 8-bytes granularity */ 591250199Sgrehan desc.data_offset8 = sizeof(hv_vm_packet_descriptor) >> 3; 592250199Sgrehan desc.length8 = (uint16_t) (packet_len_aligned >> 3); 593250199Sgrehan desc.transaction_id = request_id; 594250199Sgrehan 595250199Sgrehan buffer_list[0].data = &desc; 596250199Sgrehan buffer_list[0].length = sizeof(hv_vm_packet_descriptor); 597250199Sgrehan 598250199Sgrehan buffer_list[1].data = buffer; 599250199Sgrehan buffer_list[1].length = buffer_len; 600250199Sgrehan 601250199Sgrehan buffer_list[2].data = &aligned_data; 602250199Sgrehan buffer_list[2].length = packet_len_aligned - packet_len; 603250199Sgrehan 604250199Sgrehan ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3); 605250199Sgrehan 606250199Sgrehan /* TODO: We should determine if this is optional */ 607250199Sgrehan if (ret == 0 608250199Sgrehan && !hv_vmbus_get_ring_buffer_interrupt_mask( 609250199Sgrehan &channel->outbound)) { 610250199Sgrehan vmbus_channel_set_event(channel); 611250199Sgrehan } 612250199Sgrehan 613250199Sgrehan return (ret); 614250199Sgrehan} 615250199Sgrehan 616250199Sgrehan/** 617250199Sgrehan * @brief Send a range of single-page buffer packets using 618250199Sgrehan * a GPADL Direct packet type 619250199Sgrehan */ 620250199Sgrehanint 621250199Sgrehanhv_vmbus_channel_send_packet_pagebuffer( 622250199Sgrehan hv_vmbus_channel* channel, 623250199Sgrehan hv_vmbus_page_buffer page_buffers[], 624250199Sgrehan uint32_t page_count, 625250199Sgrehan void* buffer, 626250199Sgrehan uint32_t buffer_len, 627250199Sgrehan uint64_t request_id) 628250199Sgrehan{ 629250199Sgrehan 630250199Sgrehan int ret = 0; 631250199Sgrehan int i = 0; 632250199Sgrehan uint32_t packet_len; 633250199Sgrehan uint32_t packetLen_aligned; 634250199Sgrehan hv_vmbus_sg_buffer_list buffer_list[3]; 635250199Sgrehan hv_vmbus_channel_packet_page_buffer desc; 636250199Sgrehan uint32_t descSize; 637250199Sgrehan uint64_t alignedData = 0; 638250199Sgrehan 639250199Sgrehan if (page_count > HV_MAX_PAGE_BUFFER_COUNT) 640250199Sgrehan return (EINVAL); 641250199Sgrehan 642250199Sgrehan /* 643250199Sgrehan * Adjust the size down since hv_vmbus_channel_packet_page_buffer 644250199Sgrehan * is the largest size we support 645250199Sgrehan */ 646250199Sgrehan descSize = sizeof(hv_vmbus_channel_packet_page_buffer) - 647250199Sgrehan ((HV_MAX_PAGE_BUFFER_COUNT - page_count) * 648250199Sgrehan sizeof(hv_vmbus_page_buffer)); 649250199Sgrehan packet_len = descSize + buffer_len; 650250199Sgrehan packetLen_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 651250199Sgrehan 652250199Sgrehan /* Setup the descriptor */ 653250199Sgrehan desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 654250199Sgrehan desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 655250199Sgrehan desc.data_offset8 = descSize >> 3; /* in 8-bytes granularity */ 656250199Sgrehan desc.length8 = (uint16_t) (packetLen_aligned >> 3); 657250199Sgrehan desc.transaction_id = request_id; 658250199Sgrehan desc.range_count = page_count; 659250199Sgrehan 660250199Sgrehan for (i = 0; i < page_count; i++) { 661250199Sgrehan desc.range[i].length = page_buffers[i].length; 662250199Sgrehan desc.range[i].offset = page_buffers[i].offset; 663250199Sgrehan desc.range[i].pfn = page_buffers[i].pfn; 664250199Sgrehan } 665250199Sgrehan 666250199Sgrehan buffer_list[0].data = &desc; 667250199Sgrehan buffer_list[0].length = descSize; 668250199Sgrehan 669250199Sgrehan buffer_list[1].data = buffer; 670250199Sgrehan buffer_list[1].length = buffer_len; 671250199Sgrehan 672250199Sgrehan buffer_list[2].data = &alignedData; 673250199Sgrehan buffer_list[2].length = packetLen_aligned - packet_len; 674250199Sgrehan 675250199Sgrehan ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3); 676250199Sgrehan 677250199Sgrehan /* TODO: We should determine if this is optional */ 678250199Sgrehan if (ret == 0 && 679250199Sgrehan !hv_vmbus_get_ring_buffer_interrupt_mask(&channel->outbound)) { 680250199Sgrehan vmbus_channel_set_event(channel); 681250199Sgrehan } 682250199Sgrehan 683250199Sgrehan return (ret); 684250199Sgrehan} 685250199Sgrehan 686250199Sgrehan/** 687250199Sgrehan * @brief Send a multi-page buffer packet using a GPADL Direct packet type 688250199Sgrehan */ 689250199Sgrehanint 690250199Sgrehanhv_vmbus_channel_send_packet_multipagebuffer( 691250199Sgrehan hv_vmbus_channel* channel, 692250199Sgrehan hv_vmbus_multipage_buffer* multi_page_buffer, 693250199Sgrehan void* buffer, 694250199Sgrehan uint32_t buffer_len, 695250199Sgrehan uint64_t request_id) 696250199Sgrehan{ 697250199Sgrehan 698250199Sgrehan int ret = 0; 699250199Sgrehan uint32_t desc_size; 700250199Sgrehan uint32_t packet_len; 701250199Sgrehan uint32_t packet_len_aligned; 702250199Sgrehan uint32_t pfn_count; 703250199Sgrehan uint64_t aligned_data = 0; 704250199Sgrehan hv_vmbus_sg_buffer_list buffer_list[3]; 705250199Sgrehan hv_vmbus_channel_packet_multipage_buffer desc; 706250199Sgrehan 707250199Sgrehan pfn_count = 708250199Sgrehan HV_NUM_PAGES_SPANNED( 709250199Sgrehan multi_page_buffer->offset, 710250199Sgrehan multi_page_buffer->length); 711250199Sgrehan 712250199Sgrehan if ((pfn_count == 0) || (pfn_count > HV_MAX_MULTIPAGE_BUFFER_COUNT)) 713250199Sgrehan return (EINVAL); 714250199Sgrehan /* 715250199Sgrehan * Adjust the size down since hv_vmbus_channel_packet_multipage_buffer 716250199Sgrehan * is the largest size we support 717250199Sgrehan */ 718250199Sgrehan desc_size = 719250199Sgrehan sizeof(hv_vmbus_channel_packet_multipage_buffer) - 720250199Sgrehan ((HV_MAX_MULTIPAGE_BUFFER_COUNT - pfn_count) * 721250199Sgrehan sizeof(uint64_t)); 722250199Sgrehan packet_len = desc_size + buffer_len; 723250199Sgrehan packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 724250199Sgrehan 725250199Sgrehan /* 726250199Sgrehan * Setup the descriptor 727250199Sgrehan */ 728250199Sgrehan desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 729250199Sgrehan desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 730250199Sgrehan desc.data_offset8 = desc_size >> 3; /* in 8-bytes granularity */ 731250199Sgrehan desc.length8 = (uint16_t) (packet_len_aligned >> 3); 732250199Sgrehan desc.transaction_id = request_id; 733250199Sgrehan desc.range_count = 1; 734250199Sgrehan 735250199Sgrehan desc.range.length = multi_page_buffer->length; 736250199Sgrehan desc.range.offset = multi_page_buffer->offset; 737250199Sgrehan 738250199Sgrehan memcpy(desc.range.pfn_array, multi_page_buffer->pfn_array, 739250199Sgrehan pfn_count * sizeof(uint64_t)); 740250199Sgrehan 741250199Sgrehan buffer_list[0].data = &desc; 742250199Sgrehan buffer_list[0].length = desc_size; 743250199Sgrehan 744250199Sgrehan buffer_list[1].data = buffer; 745250199Sgrehan buffer_list[1].length = buffer_len; 746250199Sgrehan 747250199Sgrehan buffer_list[2].data = &aligned_data; 748250199Sgrehan buffer_list[2].length = packet_len_aligned - packet_len; 749250199Sgrehan 750250199Sgrehan ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3); 751250199Sgrehan 752250199Sgrehan /* TODO: We should determine if this is optional */ 753250199Sgrehan if (ret == 0 && 754250199Sgrehan !hv_vmbus_get_ring_buffer_interrupt_mask(&channel->outbound)) { 755250199Sgrehan vmbus_channel_set_event(channel); 756250199Sgrehan } 757250199Sgrehan 758250199Sgrehan return (ret); 759250199Sgrehan} 760250199Sgrehan 761250199Sgrehan/** 762250199Sgrehan * @brief Retrieve the user packet on the specified channel 763250199Sgrehan */ 764250199Sgrehanint 765250199Sgrehanhv_vmbus_channel_recv_packet( 766250199Sgrehan hv_vmbus_channel* channel, 767250199Sgrehan void* Buffer, 768250199Sgrehan uint32_t buffer_len, 769250199Sgrehan uint32_t* buffer_actual_len, 770250199Sgrehan uint64_t* request_id) 771250199Sgrehan{ 772250199Sgrehan int ret; 773250199Sgrehan uint32_t user_len; 774250199Sgrehan uint32_t packet_len; 775250199Sgrehan hv_vm_packet_descriptor desc; 776250199Sgrehan 777250199Sgrehan *buffer_actual_len = 0; 778250199Sgrehan *request_id = 0; 779250199Sgrehan 780250199Sgrehan ret = hv_ring_buffer_peek(&channel->inbound, &desc, 781250199Sgrehan sizeof(hv_vm_packet_descriptor)); 782250199Sgrehan if (ret != 0) 783250199Sgrehan return (0); 784250199Sgrehan 785250199Sgrehan packet_len = desc.length8 << 3; 786250199Sgrehan user_len = packet_len - (desc.data_offset8 << 3); 787250199Sgrehan 788250199Sgrehan *buffer_actual_len = user_len; 789250199Sgrehan 790250199Sgrehan if (user_len > buffer_len) 791250199Sgrehan return (EINVAL); 792250199Sgrehan 793250199Sgrehan *request_id = desc.transaction_id; 794250199Sgrehan 795250199Sgrehan /* Copy over the packet to the user buffer */ 796250199Sgrehan ret = hv_ring_buffer_read(&channel->inbound, Buffer, user_len, 797250199Sgrehan (desc.data_offset8 << 3)); 798250199Sgrehan 799250199Sgrehan return (0); 800250199Sgrehan} 801250199Sgrehan 802250199Sgrehan/** 803250199Sgrehan * @brief Retrieve the raw packet on the specified channel 804250199Sgrehan */ 805250199Sgrehanint 806250199Sgrehanhv_vmbus_channel_recv_packet_raw( 807250199Sgrehan hv_vmbus_channel* channel, 808250199Sgrehan void* buffer, 809250199Sgrehan uint32_t buffer_len, 810250199Sgrehan uint32_t* buffer_actual_len, 811250199Sgrehan uint64_t* request_id) 812250199Sgrehan{ 813250199Sgrehan int ret; 814250199Sgrehan uint32_t packetLen; 815250199Sgrehan uint32_t userLen; 816250199Sgrehan hv_vm_packet_descriptor desc; 817250199Sgrehan 818250199Sgrehan *buffer_actual_len = 0; 819250199Sgrehan *request_id = 0; 820250199Sgrehan 821250199Sgrehan ret = hv_ring_buffer_peek( 822250199Sgrehan &channel->inbound, &desc, 823250199Sgrehan sizeof(hv_vm_packet_descriptor)); 824250199Sgrehan 825250199Sgrehan if (ret != 0) 826250199Sgrehan return (0); 827250199Sgrehan 828250199Sgrehan packetLen = desc.length8 << 3; 829250199Sgrehan userLen = packetLen - (desc.data_offset8 << 3); 830250199Sgrehan 831250199Sgrehan *buffer_actual_len = packetLen; 832250199Sgrehan 833250199Sgrehan if (packetLen > buffer_len) 834250199Sgrehan return (ENOBUFS); 835250199Sgrehan 836250199Sgrehan *request_id = desc.transaction_id; 837250199Sgrehan 838250199Sgrehan /* Copy over the entire packet to the user buffer */ 839250199Sgrehan ret = hv_ring_buffer_read(&channel->inbound, buffer, packetLen, 0); 840250199Sgrehan 841250199Sgrehan return (0); 842250199Sgrehan} 843