vmbus_chan.c revision 302868
1250199Sgrehan/*- 2298446Ssephe * Copyright (c) 2009-2012,2016 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 302868 2016-07-15 05:06:15Z sephe $"); 31256276Sdim 32250199Sgrehan#include <sys/param.h> 33296028Ssephe#include <sys/kernel.h> 34250199Sgrehan#include <sys/malloc.h> 35250199Sgrehan#include <sys/systm.h> 36250199Sgrehan#include <sys/mbuf.h> 37250199Sgrehan#include <sys/lock.h> 38250199Sgrehan#include <sys/mutex.h> 39296181Ssephe#include <sys/sysctl.h> 40301588Ssephe 41301588Ssephe#include <machine/atomic.h> 42250199Sgrehan#include <machine/bus.h> 43301588Ssephe 44250199Sgrehan#include <vm/vm.h> 45250199Sgrehan#include <vm/vm_param.h> 46250199Sgrehan#include <vm/pmap.h> 47250199Sgrehan 48300102Ssephe#include <dev/hyperv/vmbus/hv_vmbus_priv.h> 49302619Ssephe#include <dev/hyperv/vmbus/hyperv_var.h> 50301588Ssephe#include <dev/hyperv/vmbus/vmbus_reg.h> 51300102Ssephe#include <dev/hyperv/vmbus/vmbus_var.h> 52250199Sgrehan 53302731Ssephestatic void vmbus_chan_send_event(hv_vmbus_channel* channel); 54302692Ssephestatic void vmbus_chan_update_evtflagcnt(struct vmbus_softc *, 55302692Ssephe const struct hv_vmbus_channel *); 56302864Ssephe 57302713Ssephestatic void vmbus_chan_task(void *, int); 58302713Ssephestatic void vmbus_chan_task_nobatch(void *, int); 59302864Ssephestatic void vmbus_chan_detach_task(void *, int); 60250199Sgrehan 61302864Ssephestatic void vmbus_chan_msgproc_choffer(struct vmbus_softc *, 62302864Ssephe const struct vmbus_message *); 63302864Ssephestatic void vmbus_chan_msgproc_chrescind(struct vmbus_softc *, 64302864Ssephe const struct vmbus_message *); 65302864Ssephe 66302864Ssephe/* 67302864Ssephe * Vmbus channel message processing. 68302864Ssephe */ 69302864Ssephestatic const vmbus_chanmsg_proc_t 70302864Ssephevmbus_chan_msgprocs[VMBUS_CHANMSG_TYPE_MAX] = { 71302864Ssephe VMBUS_CHANMSG_PROC(CHOFFER, vmbus_chan_msgproc_choffer), 72302864Ssephe VMBUS_CHANMSG_PROC(CHRESCIND, vmbus_chan_msgproc_chrescind), 73302864Ssephe 74302864Ssephe VMBUS_CHANMSG_PROC_WAKEUP(CHOPEN_RESP), 75302864Ssephe VMBUS_CHANMSG_PROC_WAKEUP(GPADL_CONNRESP), 76302864Ssephe VMBUS_CHANMSG_PROC_WAKEUP(GPADL_DISCONNRESP) 77302864Ssephe}; 78302864Ssephe 79250199Sgrehan/** 80250199Sgrehan * @brief Trigger an event notification on the specified channel 81250199Sgrehan */ 82250199Sgrehanstatic void 83302731Ssephevmbus_chan_send_event(hv_vmbus_channel *channel) 84250199Sgrehan{ 85302618Ssephe struct vmbus_softc *sc = channel->vmbus_sc; 86302693Ssephe uint32_t chanid = channel->ch_id; 87302618Ssephe 88302618Ssephe atomic_set_long(&sc->vmbus_tx_evtflags[chanid >> VMBUS_EVTFLAG_SHIFT], 89302618Ssephe 1UL << (chanid & VMBUS_EVTFLAG_MASK)); 90302618Ssephe 91302695Ssephe if (channel->ch_flags & VMBUS_CHAN_FLAG_HASMNF) { 92302731Ssephe atomic_set_int( 93302731Ssephe &sc->vmbus_mnf2->mnf_trigs[channel->ch_montrig_idx].mt_pending, 94302731Ssephe channel->ch_montrig_mask); 95250199Sgrehan } else { 96302726Ssephe hypercall_signal_event(channel->ch_monprm_dma.hv_paddr); 97250199Sgrehan } 98250199Sgrehan} 99250199Sgrehan 100296289Ssephestatic int 101296289Ssephevmbus_channel_sysctl_monalloc(SYSCTL_HANDLER_ARGS) 102296289Ssephe{ 103296289Ssephe struct hv_vmbus_channel *chan = arg1; 104296289Ssephe int alloc = 0; 105296289Ssephe 106302695Ssephe if (chan->ch_flags & VMBUS_CHAN_FLAG_HASMNF) 107296289Ssephe alloc = 1; 108296289Ssephe return sysctl_handle_int(oidp, &alloc, 0, req); 109296289Ssephe} 110296289Ssephe 111296181Ssephestatic void 112296290Ssephevmbus_channel_sysctl_create(hv_vmbus_channel* channel) 113296181Ssephe{ 114296181Ssephe device_t dev; 115296181Ssephe struct sysctl_oid *devch_sysctl; 116296181Ssephe struct sysctl_oid *devch_id_sysctl, *devch_sub_sysctl; 117296181Ssephe struct sysctl_oid *devch_id_in_sysctl, *devch_id_out_sysctl; 118296181Ssephe struct sysctl_ctx_list *ctx; 119296181Ssephe uint32_t ch_id; 120296181Ssephe uint16_t sub_ch_id; 121296181Ssephe char name[16]; 122296181Ssephe 123302819Ssephe hv_vmbus_channel* primary_ch = channel->ch_prichan; 124296181Ssephe 125296181Ssephe if (primary_ch == NULL) { 126302706Ssephe dev = channel->ch_dev; 127302693Ssephe ch_id = channel->ch_id; 128296181Ssephe } else { 129302706Ssephe dev = primary_ch->ch_dev; 130302693Ssephe ch_id = primary_ch->ch_id; 131302694Ssephe sub_ch_id = channel->ch_subidx; 132296181Ssephe } 133302633Ssephe ctx = &channel->ch_sysctl_ctx; 134302633Ssephe sysctl_ctx_init(ctx); 135296181Ssephe /* This creates dev.DEVNAME.DEVUNIT.channel tree */ 136296181Ssephe devch_sysctl = SYSCTL_ADD_NODE(ctx, 137296181Ssephe SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 138298693Ssephe OID_AUTO, "channel", CTLFLAG_RD | CTLFLAG_MPSAFE, 0, ""); 139296181Ssephe /* This creates dev.DEVNAME.DEVUNIT.channel.CHANID tree */ 140296181Ssephe snprintf(name, sizeof(name), "%d", ch_id); 141296181Ssephe devch_id_sysctl = SYSCTL_ADD_NODE(ctx, 142296181Ssephe SYSCTL_CHILDREN(devch_sysctl), 143298693Ssephe OID_AUTO, name, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, ""); 144296181Ssephe 145296181Ssephe if (primary_ch != NULL) { 146296181Ssephe devch_sub_sysctl = SYSCTL_ADD_NODE(ctx, 147296181Ssephe SYSCTL_CHILDREN(devch_id_sysctl), 148298693Ssephe OID_AUTO, "sub", CTLFLAG_RD | CTLFLAG_MPSAFE, 0, ""); 149296181Ssephe snprintf(name, sizeof(name), "%d", sub_ch_id); 150296181Ssephe devch_id_sysctl = SYSCTL_ADD_NODE(ctx, 151296181Ssephe SYSCTL_CHILDREN(devch_sub_sysctl), 152298693Ssephe OID_AUTO, name, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, ""); 153296188Ssephe 154296188Ssephe SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(devch_id_sysctl), 155296188Ssephe OID_AUTO, "chanid", CTLFLAG_RD, 156302693Ssephe &channel->ch_id, 0, "channel id"); 157296181Ssephe } 158296188Ssephe SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(devch_id_sysctl), OID_AUTO, 159296188Ssephe "cpu", CTLFLAG_RD, &channel->target_cpu, 0, "owner CPU id"); 160296289Ssephe SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(devch_id_sysctl), OID_AUTO, 161298693Ssephe "monitor_allocated", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, 162298693Ssephe channel, 0, vmbus_channel_sysctl_monalloc, "I", 163296289Ssephe "is monitor allocated to this channel"); 164296188Ssephe 165296181Ssephe devch_id_in_sysctl = SYSCTL_ADD_NODE(ctx, 166296181Ssephe SYSCTL_CHILDREN(devch_id_sysctl), 167296181Ssephe OID_AUTO, 168296181Ssephe "in", 169298693Ssephe CTLFLAG_RD | CTLFLAG_MPSAFE, 0, ""); 170296181Ssephe devch_id_out_sysctl = SYSCTL_ADD_NODE(ctx, 171296181Ssephe SYSCTL_CHILDREN(devch_id_sysctl), 172296181Ssephe OID_AUTO, 173296181Ssephe "out", 174298693Ssephe CTLFLAG_RD | CTLFLAG_MPSAFE, 0, ""); 175296181Ssephe hv_ring_buffer_stat(ctx, 176296181Ssephe SYSCTL_CHILDREN(devch_id_in_sysctl), 177296181Ssephe &(channel->inbound), 178296181Ssephe "inbound ring buffer stats"); 179296181Ssephe hv_ring_buffer_stat(ctx, 180296181Ssephe SYSCTL_CHILDREN(devch_id_out_sysctl), 181296181Ssephe &(channel->outbound), 182296181Ssephe "outbound ring buffer stats"); 183296181Ssephe} 184296290Ssephe 185250199Sgrehan/** 186250199Sgrehan * @brief Open the specified channel 187250199Sgrehan */ 188250199Sgrehanint 189250199Sgrehanhv_vmbus_channel_open( 190250199Sgrehan hv_vmbus_channel* new_channel, 191250199Sgrehan uint32_t send_ring_buffer_size, 192250199Sgrehan uint32_t recv_ring_buffer_size, 193250199Sgrehan void* user_data, 194250199Sgrehan uint32_t user_data_len, 195250199Sgrehan hv_vmbus_pfn_channel_callback pfn_on_channel_callback, 196250199Sgrehan void* context) 197250199Sgrehan{ 198302607Ssephe struct vmbus_softc *sc = new_channel->vmbus_sc; 199302607Ssephe const struct vmbus_chanmsg_chopen_resp *resp; 200302607Ssephe const struct vmbus_message *msg; 201302607Ssephe struct vmbus_chanmsg_chopen *req; 202302607Ssephe struct vmbus_msghc *mh; 203302607Ssephe uint32_t status; 204250199Sgrehan int ret = 0; 205250199Sgrehan void *in, *out; 206250199Sgrehan 207302607Ssephe if (user_data_len > VMBUS_CHANMSG_CHOPEN_UDATA_SIZE) { 208302607Ssephe device_printf(sc->vmbus_dev, 209302607Ssephe "invalid udata len %u for chan%u\n", 210302693Ssephe user_data_len, new_channel->ch_id); 211302607Ssephe return EINVAL; 212302607Ssephe } 213302607Ssephe 214302812Ssephe if (atomic_testandset_int(&new_channel->ch_stflags, 215302812Ssephe VMBUS_CHAN_ST_OPENED_SHIFT)) 216302812Ssephe panic("double-open chan%u", new_channel->ch_id); 217282212Swhu 218250199Sgrehan new_channel->on_channel_callback = pfn_on_channel_callback; 219250199Sgrehan new_channel->channel_callback_context = context; 220250199Sgrehan 221302692Ssephe vmbus_chan_update_evtflagcnt(sc, new_channel); 222300102Ssephe 223302557Ssephe new_channel->rxq = VMBUS_PCPU_GET(new_channel->vmbus_sc, event_tq, 224300646Ssephe new_channel->target_cpu); 225302713Ssephe if (new_channel->ch_flags & VMBUS_CHAN_FLAG_BATCHREAD) { 226302713Ssephe TASK_INIT(&new_channel->channel_task, 0, 227302713Ssephe vmbus_chan_task, new_channel); 228302713Ssephe } else { 229302713Ssephe TASK_INIT(&new_channel->channel_task, 0, 230302713Ssephe vmbus_chan_task_nobatch, new_channel); 231302713Ssephe } 232294886Ssephe 233250199Sgrehan /* Allocate the ring buffer */ 234250199Sgrehan out = contigmalloc((send_ring_buffer_size + recv_ring_buffer_size), 235256350Sgrehan M_DEVBUF, M_ZERO, 0UL, BUS_SPACE_MAXADDR, PAGE_SIZE, 0); 236250199Sgrehan KASSERT(out != NULL, 237250199Sgrehan ("Error VMBUS: contigmalloc failed to allocate Ring Buffer!")); 238302812Ssephe if (out == NULL) { 239302812Ssephe ret = ENOMEM; 240302812Ssephe goto failed; 241302812Ssephe } 242250199Sgrehan 243250199Sgrehan in = ((uint8_t *) out + send_ring_buffer_size); 244250199Sgrehan 245250199Sgrehan new_channel->ring_buffer_pages = out; 246256350Sgrehan new_channel->ring_buffer_page_count = (send_ring_buffer_size + 247256350Sgrehan recv_ring_buffer_size) >> PAGE_SHIFT; 248256350Sgrehan new_channel->ring_buffer_size = send_ring_buffer_size + 249256350Sgrehan recv_ring_buffer_size; 250250199Sgrehan 251250199Sgrehan hv_vmbus_ring_buffer_init( 252250199Sgrehan &new_channel->outbound, 253250199Sgrehan out, 254250199Sgrehan send_ring_buffer_size); 255250199Sgrehan 256250199Sgrehan hv_vmbus_ring_buffer_init( 257250199Sgrehan &new_channel->inbound, 258250199Sgrehan in, 259250199Sgrehan recv_ring_buffer_size); 260250199Sgrehan 261296290Ssephe /* Create sysctl tree for this channel */ 262296290Ssephe vmbus_channel_sysctl_create(new_channel); 263296181Ssephe 264250199Sgrehan /** 265250199Sgrehan * Establish the gpadl for the ring buffer 266250199Sgrehan */ 267250199Sgrehan new_channel->ring_buffer_gpadl_handle = 0; 268250199Sgrehan 269250199Sgrehan ret = hv_vmbus_channel_establish_gpadl(new_channel, 270250199Sgrehan new_channel->outbound.ring_buffer, 271250199Sgrehan send_ring_buffer_size + recv_ring_buffer_size, 272250199Sgrehan &new_channel->ring_buffer_gpadl_handle); 273250199Sgrehan 274302607Ssephe /* 275302607Ssephe * Open channel w/ the bufring GPADL on the target CPU. 276250199Sgrehan */ 277302607Ssephe mh = vmbus_msghc_get(sc, sizeof(*req)); 278302607Ssephe if (mh == NULL) { 279302607Ssephe device_printf(sc->vmbus_dev, 280302607Ssephe "can not get msg hypercall for chopen(chan%u)\n", 281302693Ssephe new_channel->ch_id); 282302812Ssephe ret = ENXIO; 283302812Ssephe goto failed; 284302607Ssephe } 285250199Sgrehan 286302607Ssephe req = vmbus_msghc_dataptr(mh); 287302607Ssephe req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CHOPEN; 288302693Ssephe req->chm_chanid = new_channel->ch_id; 289302693Ssephe req->chm_openid = new_channel->ch_id; 290302607Ssephe req->chm_gpadl = new_channel->ring_buffer_gpadl_handle; 291302607Ssephe req->chm_vcpuid = new_channel->target_vcpu; 292302607Ssephe req->chm_rxbr_pgofs = send_ring_buffer_size >> PAGE_SHIFT; 293250199Sgrehan if (user_data_len) 294302607Ssephe memcpy(req->chm_udata, user_data, user_data_len); 295250199Sgrehan 296302607Ssephe ret = vmbus_msghc_exec(sc, mh); 297302607Ssephe if (ret != 0) { 298302607Ssephe device_printf(sc->vmbus_dev, 299302607Ssephe "chopen(chan%u) msg hypercall exec failed: %d\n", 300302693Ssephe new_channel->ch_id, ret); 301302607Ssephe vmbus_msghc_put(sc, mh); 302302812Ssephe goto failed; 303302607Ssephe } 304250199Sgrehan 305302607Ssephe msg = vmbus_msghc_wait_result(sc, mh); 306302607Ssephe resp = (const struct vmbus_chanmsg_chopen_resp *)msg->msg_data; 307302607Ssephe status = resp->chm_status; 308250199Sgrehan 309302607Ssephe vmbus_msghc_put(sc, mh); 310250199Sgrehan 311302607Ssephe if (status == 0) { 312302607Ssephe if (bootverbose) { 313302607Ssephe device_printf(sc->vmbus_dev, "chan%u opened\n", 314302693Ssephe new_channel->ch_id); 315302607Ssephe } 316302812Ssephe return 0; 317250199Sgrehan } 318302812Ssephe 319302812Ssephe device_printf(sc->vmbus_dev, "failed to open chan%u\n", 320302812Ssephe new_channel->ch_id); 321302812Ssephe ret = ENXIO; 322302812Ssephe 323302812Ssephefailed: 324302812Ssephe atomic_clear_int(&new_channel->ch_stflags, VMBUS_CHAN_ST_OPENED); 325302812Ssephe return ret; 326250199Sgrehan} 327250199Sgrehan 328250199Sgrehan/** 329302609Ssephe * @brief Establish a GPADL for the specified buffer 330250199Sgrehan */ 331302609Ssepheint 332302609Ssephehv_vmbus_channel_establish_gpadl(struct hv_vmbus_channel *channel, 333302609Ssephe void *contig_buffer, uint32_t size, uint32_t *gpadl0) 334250199Sgrehan{ 335302609Ssephe struct vmbus_softc *sc = channel->vmbus_sc; 336302609Ssephe struct vmbus_msghc *mh; 337302609Ssephe struct vmbus_chanmsg_gpadl_conn *req; 338302609Ssephe const struct vmbus_message *msg; 339302609Ssephe size_t reqsz; 340302609Ssephe uint32_t gpadl, status; 341302609Ssephe int page_count, range_len, i, cnt, error; 342302609Ssephe uint64_t page_id, paddr; 343250199Sgrehan 344302609Ssephe /* 345302609Ssephe * Preliminary checks. 346302609Ssephe */ 347250199Sgrehan 348302609Ssephe KASSERT((size & PAGE_MASK) == 0, 349302609Ssephe ("invalid GPA size %u, not multiple page size", size)); 350250199Sgrehan page_count = size >> PAGE_SHIFT; 351250199Sgrehan 352302609Ssephe paddr = hv_get_phys_addr(contig_buffer); 353302609Ssephe KASSERT((paddr & PAGE_MASK) == 0, 354302609Ssephe ("GPA is not page aligned %jx", (uintmax_t)paddr)); 355302609Ssephe page_id = paddr >> PAGE_SHIFT; 356250199Sgrehan 357302609Ssephe range_len = __offsetof(struct vmbus_gpa_range, gpa_page[page_count]); 358302609Ssephe /* 359302609Ssephe * We don't support multiple GPA ranges. 360302609Ssephe */ 361302609Ssephe if (range_len > UINT16_MAX) { 362302609Ssephe device_printf(sc->vmbus_dev, "GPA too large, %d pages\n", 363302609Ssephe page_count); 364302609Ssephe return EOPNOTSUPP; 365250199Sgrehan } 366250199Sgrehan 367302609Ssephe /* 368302609Ssephe * Allocate GPADL id. 369302609Ssephe */ 370302630Ssephe gpadl = vmbus_gpadl_alloc(sc); 371302609Ssephe *gpadl0 = gpadl; 372250199Sgrehan 373302609Ssephe /* 374302609Ssephe * Connect this GPADL to the target channel. 375302609Ssephe * 376302609Ssephe * NOTE: 377302609Ssephe * Since each message can only hold small set of page 378302609Ssephe * addresses, several messages may be required to 379302609Ssephe * complete the connection. 380302609Ssephe */ 381302609Ssephe if (page_count > VMBUS_CHANMSG_GPADL_CONN_PGMAX) 382302609Ssephe cnt = VMBUS_CHANMSG_GPADL_CONN_PGMAX; 383302609Ssephe else 384302609Ssephe cnt = page_count; 385302609Ssephe page_count -= cnt; 386250199Sgrehan 387302609Ssephe reqsz = __offsetof(struct vmbus_chanmsg_gpadl_conn, 388302609Ssephe chm_range.gpa_page[cnt]); 389302609Ssephe mh = vmbus_msghc_get(sc, reqsz); 390302609Ssephe if (mh == NULL) { 391302609Ssephe device_printf(sc->vmbus_dev, 392302609Ssephe "can not get msg hypercall for gpadl->chan%u\n", 393302693Ssephe channel->ch_id); 394302609Ssephe return EIO; 395250199Sgrehan } 396250199Sgrehan 397302609Ssephe req = vmbus_msghc_dataptr(mh); 398302609Ssephe req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_GPADL_CONN; 399302693Ssephe req->chm_chanid = channel->ch_id; 400302609Ssephe req->chm_gpadl = gpadl; 401302609Ssephe req->chm_range_len = range_len; 402302609Ssephe req->chm_range_cnt = 1; 403302609Ssephe req->chm_range.gpa_len = size; 404302609Ssephe req->chm_range.gpa_ofs = 0; 405302609Ssephe for (i = 0; i < cnt; ++i) 406302609Ssephe req->chm_range.gpa_page[i] = page_id++; 407250199Sgrehan 408302609Ssephe error = vmbus_msghc_exec(sc, mh); 409302609Ssephe if (error) { 410302609Ssephe device_printf(sc->vmbus_dev, 411302609Ssephe "gpadl->chan%u msg hypercall exec failed: %d\n", 412302693Ssephe channel->ch_id, error); 413302609Ssephe vmbus_msghc_put(sc, mh); 414302609Ssephe return error; 415302609Ssephe } 416250199Sgrehan 417302609Ssephe while (page_count > 0) { 418302609Ssephe struct vmbus_chanmsg_gpadl_subconn *subreq; 419250199Sgrehan 420302609Ssephe if (page_count > VMBUS_CHANMSG_GPADL_SUBCONN_PGMAX) 421302609Ssephe cnt = VMBUS_CHANMSG_GPADL_SUBCONN_PGMAX; 422302609Ssephe else 423302609Ssephe cnt = page_count; 424302609Ssephe page_count -= cnt; 425250199Sgrehan 426302609Ssephe reqsz = __offsetof(struct vmbus_chanmsg_gpadl_subconn, 427302609Ssephe chm_gpa_page[cnt]); 428302609Ssephe vmbus_msghc_reset(mh, reqsz); 429250199Sgrehan 430302609Ssephe subreq = vmbus_msghc_dataptr(mh); 431302609Ssephe subreq->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_GPADL_SUBCONN; 432302609Ssephe subreq->chm_gpadl = gpadl; 433302609Ssephe for (i = 0; i < cnt; ++i) 434302609Ssephe subreq->chm_gpa_page[i] = page_id++; 435250199Sgrehan 436302609Ssephe vmbus_msghc_exec_noresult(mh); 437250199Sgrehan } 438302609Ssephe KASSERT(page_count == 0, ("invalid page count %d", page_count)); 439250199Sgrehan 440302609Ssephe msg = vmbus_msghc_wait_result(sc, mh); 441302609Ssephe status = ((const struct vmbus_chanmsg_gpadl_connresp *) 442302609Ssephe msg->msg_data)->chm_status; 443250199Sgrehan 444302609Ssephe vmbus_msghc_put(sc, mh); 445250199Sgrehan 446302609Ssephe if (status != 0) { 447302609Ssephe device_printf(sc->vmbus_dev, "gpadl->chan%u failed: " 448302693Ssephe "status %u\n", channel->ch_id, status); 449302609Ssephe return EIO; 450302632Ssephe } else { 451302632Ssephe if (bootverbose) { 452302632Ssephe device_printf(sc->vmbus_dev, "gpadl->chan%u " 453302693Ssephe "succeeded\n", channel->ch_id); 454302632Ssephe } 455302609Ssephe } 456302609Ssephe return 0; 457250199Sgrehan} 458250199Sgrehan 459302611Ssephe/* 460302611Ssephe * Disconnect the GPA from the target channel 461250199Sgrehan */ 462250199Sgrehanint 463302611Ssephehv_vmbus_channel_teardown_gpdal(struct hv_vmbus_channel *chan, uint32_t gpadl) 464250199Sgrehan{ 465302611Ssephe struct vmbus_softc *sc = chan->vmbus_sc; 466302611Ssephe struct vmbus_msghc *mh; 467302611Ssephe struct vmbus_chanmsg_gpadl_disconn *req; 468302611Ssephe int error; 469250199Sgrehan 470302611Ssephe mh = vmbus_msghc_get(sc, sizeof(*req)); 471302611Ssephe if (mh == NULL) { 472302611Ssephe device_printf(sc->vmbus_dev, 473302611Ssephe "can not get msg hypercall for gpa x->chan%u\n", 474302693Ssephe chan->ch_id); 475302611Ssephe return EBUSY; 476250199Sgrehan } 477250199Sgrehan 478302611Ssephe req = vmbus_msghc_dataptr(mh); 479302611Ssephe req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_GPADL_DISCONN; 480302693Ssephe req->chm_chanid = chan->ch_id; 481302611Ssephe req->chm_gpadl = gpadl; 482250199Sgrehan 483302611Ssephe error = vmbus_msghc_exec(sc, mh); 484302611Ssephe if (error) { 485302611Ssephe device_printf(sc->vmbus_dev, 486302611Ssephe "gpa x->chan%u msg hypercall exec failed: %d\n", 487302693Ssephe chan->ch_id, error); 488302611Ssephe vmbus_msghc_put(sc, mh); 489302611Ssephe return error; 490302611Ssephe } 491250199Sgrehan 492302611Ssephe vmbus_msghc_wait_result(sc, mh); 493302611Ssephe /* Discard result; no useful information */ 494302611Ssephe vmbus_msghc_put(sc, mh); 495250199Sgrehan 496302611Ssephe return 0; 497250199Sgrehan} 498250199Sgrehan 499282212Swhustatic void 500282212Swhuhv_vmbus_channel_close_internal(hv_vmbus_channel *channel) 501250199Sgrehan{ 502302610Ssephe struct vmbus_softc *sc = channel->vmbus_sc; 503302610Ssephe struct vmbus_msghc *mh; 504302610Ssephe struct vmbus_chanmsg_chclose *req; 505294886Ssephe struct taskqueue *rxq = channel->rxq; 506302610Ssephe int error; 507250199Sgrehan 508302812Ssephe /* TODO: stringent check */ 509302812Ssephe atomic_clear_int(&channel->ch_stflags, VMBUS_CHAN_ST_OPENED); 510302812Ssephe 511302633Ssephe sysctl_ctx_free(&channel->ch_sysctl_ctx); 512282212Swhu 513282212Swhu /* 514294886Ssephe * set rxq to NULL to avoid more requests be scheduled 515294886Ssephe */ 516294886Ssephe channel->rxq = NULL; 517294886Ssephe taskqueue_drain(rxq, &channel->channel_task); 518250199Sgrehan channel->on_channel_callback = NULL; 519250199Sgrehan 520250199Sgrehan /** 521250199Sgrehan * Send a closing message 522250199Sgrehan */ 523250199Sgrehan 524302610Ssephe mh = vmbus_msghc_get(sc, sizeof(*req)); 525302610Ssephe if (mh == NULL) { 526302610Ssephe device_printf(sc->vmbus_dev, 527302610Ssephe "can not get msg hypercall for chclose(chan%u)\n", 528302693Ssephe channel->ch_id); 529302610Ssephe return; 530302610Ssephe } 531250199Sgrehan 532302610Ssephe req = vmbus_msghc_dataptr(mh); 533302610Ssephe req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CHCLOSE; 534302693Ssephe req->chm_chanid = channel->ch_id; 535250199Sgrehan 536302610Ssephe error = vmbus_msghc_exec_noresult(mh); 537302610Ssephe vmbus_msghc_put(sc, mh); 538302610Ssephe 539302610Ssephe if (error) { 540302610Ssephe device_printf(sc->vmbus_dev, 541302610Ssephe "chclose(chan%u) msg hypercall exec failed: %d\n", 542302693Ssephe channel->ch_id, error); 543302610Ssephe return; 544302610Ssephe } else if (bootverbose) { 545302610Ssephe device_printf(sc->vmbus_dev, "close chan%u\n", 546302693Ssephe channel->ch_id); 547302610Ssephe } 548302610Ssephe 549250199Sgrehan /* Tear down the gpadl for the channel's ring buffer */ 550250199Sgrehan if (channel->ring_buffer_gpadl_handle) { 551250199Sgrehan hv_vmbus_channel_teardown_gpdal(channel, 552250199Sgrehan channel->ring_buffer_gpadl_handle); 553250199Sgrehan } 554250199Sgrehan 555250199Sgrehan /* TODO: Send a msg to release the childRelId */ 556250199Sgrehan 557250199Sgrehan /* cleanup the ring buffers for this channel */ 558250199Sgrehan hv_ring_buffer_cleanup(&channel->outbound); 559250199Sgrehan hv_ring_buffer_cleanup(&channel->inbound); 560250199Sgrehan 561256350Sgrehan contigfree(channel->ring_buffer_pages, channel->ring_buffer_size, 562256350Sgrehan M_DEVBUF); 563282212Swhu} 564250199Sgrehan 565302818Ssephe/* 566302818Ssephe * Caller should make sure that all sub-channels have 567302818Ssephe * been added to 'chan' and all to-be-closed channels 568302818Ssephe * are not being opened. 569282212Swhu */ 570282212Swhuvoid 571302818Ssephehv_vmbus_channel_close(struct hv_vmbus_channel *chan) 572282212Swhu{ 573302818Ssephe int subchan_cnt; 574282212Swhu 575302818Ssephe if (!VMBUS_CHAN_ISPRIMARY(chan)) { 576282212Swhu /* 577302818Ssephe * Sub-channel is closed when its primary channel 578302818Ssephe * is closed; done. 579282212Swhu */ 580282212Swhu return; 581282212Swhu } 582282212Swhu 583250199Sgrehan /* 584302818Ssephe * Close all sub-channels, if any. 585250199Sgrehan */ 586302819Ssephe subchan_cnt = chan->ch_subchan_cnt; 587302818Ssephe if (subchan_cnt > 0) { 588302818Ssephe struct hv_vmbus_channel **subchan; 589302818Ssephe int i; 590302818Ssephe 591302818Ssephe subchan = vmbus_get_subchan(chan, subchan_cnt); 592302818Ssephe for (i = 0; i < subchan_cnt; ++i) 593302818Ssephe hv_vmbus_channel_close_internal(subchan[i]); 594302818Ssephe vmbus_rel_subchan(subchan, subchan_cnt); 595250199Sgrehan } 596302818Ssephe 597302818Ssephe /* Then close the primary channel. */ 598302818Ssephe hv_vmbus_channel_close_internal(chan); 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; 618282212Swhu 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 642282212Swhu ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3, 643282212Swhu &need_sig); 644250199Sgrehan 645250199Sgrehan /* TODO: We should determine if this is optional */ 646302731Ssephe if (ret == 0 && need_sig) 647302731Ssephe vmbus_chan_send_event(channel); 648250199Sgrehan 649250199Sgrehan return (ret); 650250199Sgrehan} 651250199Sgrehan 652250199Sgrehan/** 653250199Sgrehan * @brief Send a range of single-page buffer packets using 654250199Sgrehan * a GPADL Direct packet type 655250199Sgrehan */ 656250199Sgrehanint 657250199Sgrehanhv_vmbus_channel_send_packet_pagebuffer( 658250199Sgrehan hv_vmbus_channel* channel, 659250199Sgrehan hv_vmbus_page_buffer page_buffers[], 660250199Sgrehan uint32_t page_count, 661250199Sgrehan void* buffer, 662250199Sgrehan uint32_t buffer_len, 663250199Sgrehan uint64_t request_id) 664250199Sgrehan{ 665250199Sgrehan 666250199Sgrehan int ret = 0; 667282212Swhu boolean_t need_sig; 668250199Sgrehan uint32_t packet_len; 669294705Ssephe uint32_t page_buflen; 670250199Sgrehan uint32_t packetLen_aligned; 671294705Ssephe hv_vmbus_sg_buffer_list buffer_list[4]; 672250199Sgrehan hv_vmbus_channel_packet_page_buffer desc; 673250199Sgrehan uint32_t descSize; 674250199Sgrehan uint64_t alignedData = 0; 675250199Sgrehan 676250199Sgrehan if (page_count > HV_MAX_PAGE_BUFFER_COUNT) 677250199Sgrehan return (EINVAL); 678250199Sgrehan 679250199Sgrehan /* 680250199Sgrehan * Adjust the size down since hv_vmbus_channel_packet_page_buffer 681250199Sgrehan * is the largest size we support 682250199Sgrehan */ 683294705Ssephe descSize = __offsetof(hv_vmbus_channel_packet_page_buffer, range); 684294705Ssephe page_buflen = sizeof(hv_vmbus_page_buffer) * page_count; 685294705Ssephe packet_len = descSize + page_buflen + buffer_len; 686250199Sgrehan packetLen_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 687250199Sgrehan 688250199Sgrehan /* Setup the descriptor */ 689250199Sgrehan desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 690250199Sgrehan desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 691294705Ssephe /* in 8-bytes granularity */ 692294705Ssephe desc.data_offset8 = (descSize + page_buflen) >> 3; 693250199Sgrehan desc.length8 = (uint16_t) (packetLen_aligned >> 3); 694250199Sgrehan desc.transaction_id = request_id; 695250199Sgrehan desc.range_count = page_count; 696250199Sgrehan 697250199Sgrehan buffer_list[0].data = &desc; 698250199Sgrehan buffer_list[0].length = descSize; 699250199Sgrehan 700294705Ssephe buffer_list[1].data = page_buffers; 701294705Ssephe buffer_list[1].length = page_buflen; 702250199Sgrehan 703294705Ssephe buffer_list[2].data = buffer; 704294705Ssephe buffer_list[2].length = buffer_len; 705250199Sgrehan 706294705Ssephe buffer_list[3].data = &alignedData; 707294705Ssephe buffer_list[3].length = packetLen_aligned - packet_len; 708294705Ssephe 709294705Ssephe ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 4, 710282212Swhu &need_sig); 711250199Sgrehan 712250199Sgrehan /* TODO: We should determine if this is optional */ 713302731Ssephe if (ret == 0 && need_sig) 714302731Ssephe vmbus_chan_send_event(channel); 715250199Sgrehan 716250199Sgrehan return (ret); 717250199Sgrehan} 718250199Sgrehan 719250199Sgrehan/** 720250199Sgrehan * @brief Send a multi-page buffer packet using a GPADL Direct packet type 721250199Sgrehan */ 722250199Sgrehanint 723250199Sgrehanhv_vmbus_channel_send_packet_multipagebuffer( 724250199Sgrehan hv_vmbus_channel* channel, 725250199Sgrehan hv_vmbus_multipage_buffer* multi_page_buffer, 726250199Sgrehan void* buffer, 727250199Sgrehan uint32_t buffer_len, 728250199Sgrehan uint64_t request_id) 729250199Sgrehan{ 730250199Sgrehan 731250199Sgrehan int ret = 0; 732250199Sgrehan uint32_t desc_size; 733282212Swhu boolean_t need_sig; 734250199Sgrehan uint32_t packet_len; 735250199Sgrehan uint32_t packet_len_aligned; 736250199Sgrehan uint32_t pfn_count; 737250199Sgrehan uint64_t aligned_data = 0; 738250199Sgrehan hv_vmbus_sg_buffer_list buffer_list[3]; 739250199Sgrehan hv_vmbus_channel_packet_multipage_buffer desc; 740250199Sgrehan 741250199Sgrehan pfn_count = 742250199Sgrehan HV_NUM_PAGES_SPANNED( 743250199Sgrehan multi_page_buffer->offset, 744250199Sgrehan multi_page_buffer->length); 745250199Sgrehan 746250199Sgrehan if ((pfn_count == 0) || (pfn_count > HV_MAX_MULTIPAGE_BUFFER_COUNT)) 747250199Sgrehan return (EINVAL); 748250199Sgrehan /* 749250199Sgrehan * Adjust the size down since hv_vmbus_channel_packet_multipage_buffer 750250199Sgrehan * is the largest size we support 751250199Sgrehan */ 752250199Sgrehan desc_size = 753250199Sgrehan sizeof(hv_vmbus_channel_packet_multipage_buffer) - 754250199Sgrehan ((HV_MAX_MULTIPAGE_BUFFER_COUNT - pfn_count) * 755250199Sgrehan sizeof(uint64_t)); 756250199Sgrehan packet_len = desc_size + buffer_len; 757250199Sgrehan packet_len_aligned = HV_ALIGN_UP(packet_len, sizeof(uint64_t)); 758250199Sgrehan 759250199Sgrehan /* 760250199Sgrehan * Setup the descriptor 761250199Sgrehan */ 762250199Sgrehan desc.type = HV_VMBUS_PACKET_TYPE_DATA_USING_GPA_DIRECT; 763250199Sgrehan desc.flags = HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; 764250199Sgrehan desc.data_offset8 = desc_size >> 3; /* in 8-bytes granularity */ 765250199Sgrehan desc.length8 = (uint16_t) (packet_len_aligned >> 3); 766250199Sgrehan desc.transaction_id = request_id; 767250199Sgrehan desc.range_count = 1; 768250199Sgrehan 769250199Sgrehan desc.range.length = multi_page_buffer->length; 770250199Sgrehan desc.range.offset = multi_page_buffer->offset; 771250199Sgrehan 772250199Sgrehan memcpy(desc.range.pfn_array, multi_page_buffer->pfn_array, 773250199Sgrehan pfn_count * sizeof(uint64_t)); 774250199Sgrehan 775250199Sgrehan buffer_list[0].data = &desc; 776250199Sgrehan buffer_list[0].length = desc_size; 777250199Sgrehan 778250199Sgrehan buffer_list[1].data = buffer; 779250199Sgrehan buffer_list[1].length = buffer_len; 780250199Sgrehan 781250199Sgrehan buffer_list[2].data = &aligned_data; 782250199Sgrehan buffer_list[2].length = packet_len_aligned - packet_len; 783250199Sgrehan 784282212Swhu ret = hv_ring_buffer_write(&channel->outbound, buffer_list, 3, 785282212Swhu &need_sig); 786250199Sgrehan 787250199Sgrehan /* TODO: We should determine if this is optional */ 788302731Ssephe if (ret == 0 && need_sig) 789302731Ssephe vmbus_chan_send_event(channel); 790250199Sgrehan 791250199Sgrehan return (ret); 792250199Sgrehan} 793250199Sgrehan 794250199Sgrehan/** 795250199Sgrehan * @brief Retrieve the user packet on the specified channel 796250199Sgrehan */ 797250199Sgrehanint 798250199Sgrehanhv_vmbus_channel_recv_packet( 799250199Sgrehan hv_vmbus_channel* channel, 800250199Sgrehan void* Buffer, 801250199Sgrehan uint32_t buffer_len, 802250199Sgrehan uint32_t* buffer_actual_len, 803250199Sgrehan uint64_t* request_id) 804250199Sgrehan{ 805250199Sgrehan int ret; 806250199Sgrehan uint32_t user_len; 807250199Sgrehan uint32_t packet_len; 808250199Sgrehan hv_vm_packet_descriptor desc; 809250199Sgrehan 810250199Sgrehan *buffer_actual_len = 0; 811250199Sgrehan *request_id = 0; 812250199Sgrehan 813250199Sgrehan ret = hv_ring_buffer_peek(&channel->inbound, &desc, 814250199Sgrehan sizeof(hv_vm_packet_descriptor)); 815250199Sgrehan if (ret != 0) 816250199Sgrehan return (0); 817250199Sgrehan 818250199Sgrehan packet_len = desc.length8 << 3; 819250199Sgrehan user_len = packet_len - (desc.data_offset8 << 3); 820250199Sgrehan 821250199Sgrehan *buffer_actual_len = user_len; 822250199Sgrehan 823250199Sgrehan if (user_len > buffer_len) 824250199Sgrehan return (EINVAL); 825250199Sgrehan 826250199Sgrehan *request_id = desc.transaction_id; 827250199Sgrehan 828250199Sgrehan /* Copy over the packet to the user buffer */ 829250199Sgrehan ret = hv_ring_buffer_read(&channel->inbound, Buffer, user_len, 830250199Sgrehan (desc.data_offset8 << 3)); 831250199Sgrehan 832250199Sgrehan return (0); 833250199Sgrehan} 834250199Sgrehan 835250199Sgrehan/** 836250199Sgrehan * @brief Retrieve the raw packet on the specified channel 837250199Sgrehan */ 838250199Sgrehanint 839250199Sgrehanhv_vmbus_channel_recv_packet_raw( 840250199Sgrehan hv_vmbus_channel* channel, 841250199Sgrehan void* buffer, 842250199Sgrehan uint32_t buffer_len, 843250199Sgrehan uint32_t* buffer_actual_len, 844250199Sgrehan uint64_t* request_id) 845250199Sgrehan{ 846250199Sgrehan int ret; 847250199Sgrehan uint32_t packetLen; 848250199Sgrehan hv_vm_packet_descriptor desc; 849250199Sgrehan 850250199Sgrehan *buffer_actual_len = 0; 851250199Sgrehan *request_id = 0; 852250199Sgrehan 853250199Sgrehan ret = hv_ring_buffer_peek( 854250199Sgrehan &channel->inbound, &desc, 855250199Sgrehan sizeof(hv_vm_packet_descriptor)); 856250199Sgrehan 857250199Sgrehan if (ret != 0) 858250199Sgrehan return (0); 859250199Sgrehan 860250199Sgrehan packetLen = desc.length8 << 3; 861250199Sgrehan *buffer_actual_len = packetLen; 862250199Sgrehan 863250199Sgrehan if (packetLen > buffer_len) 864250199Sgrehan return (ENOBUFS); 865250199Sgrehan 866250199Sgrehan *request_id = desc.transaction_id; 867250199Sgrehan 868250199Sgrehan /* Copy over the entire packet to the user buffer */ 869250199Sgrehan ret = hv_ring_buffer_read(&channel->inbound, buffer, packetLen, 0); 870250199Sgrehan 871250199Sgrehan return (0); 872250199Sgrehan} 873294886Ssephe 874294886Ssephestatic void 875302713Ssephevmbus_chan_task(void *xchan, int pending __unused) 876294886Ssephe{ 877302713Ssephe struct hv_vmbus_channel *chan = xchan; 878302713Ssephe void (*callback)(void *); 879302713Ssephe void *arg; 880294886Ssephe 881302713Ssephe arg = chan->channel_callback_context; 882302713Ssephe callback = chan->on_channel_callback; 883302709Ssephe 884302710Ssephe /* 885302710Ssephe * Optimize host to guest signaling by ensuring: 886302710Ssephe * 1. While reading the channel, we disable interrupts from 887302710Ssephe * host. 888302710Ssephe * 2. Ensure that we process all posted messages from the host 889302710Ssephe * before returning from this callback. 890302710Ssephe * 3. Once we return, enable signaling from the host. Once this 891302710Ssephe * state is set we check to see if additional packets are 892302710Ssephe * available to read. In this case we repeat the process. 893302713Ssephe * 894302713Ssephe * NOTE: Interrupt has been disabled in the ISR. 895302710Ssephe */ 896302713Ssephe for (;;) { 897302713Ssephe uint32_t left; 898294886Ssephe 899302713Ssephe callback(arg); 900294886Ssephe 901302713Ssephe left = hv_ring_buffer_read_end(&chan->inbound); 902302713Ssephe if (left == 0) { 903302713Ssephe /* No more data in RX bufring; done */ 904302713Ssephe break; 905302713Ssephe } 906302713Ssephe hv_ring_buffer_read_begin(&chan->inbound); 907302713Ssephe } 908294886Ssephe} 909302692Ssephe 910302713Ssephestatic void 911302713Ssephevmbus_chan_task_nobatch(void *xchan, int pending __unused) 912302713Ssephe{ 913302713Ssephe struct hv_vmbus_channel *chan = xchan; 914302713Ssephe 915302713Ssephe chan->on_channel_callback(chan->channel_callback_context); 916302713Ssephe} 917302713Ssephe 918302692Ssephestatic __inline void 919302692Ssephevmbus_event_flags_proc(struct vmbus_softc *sc, volatile u_long *event_flags, 920302692Ssephe int flag_cnt) 921302692Ssephe{ 922302692Ssephe int f; 923302692Ssephe 924302692Ssephe for (f = 0; f < flag_cnt; ++f) { 925302806Ssephe uint32_t chid_base; 926302692Ssephe u_long flags; 927302806Ssephe int chid_ofs; 928302692Ssephe 929302692Ssephe if (event_flags[f] == 0) 930302692Ssephe continue; 931302692Ssephe 932302692Ssephe flags = atomic_swap_long(&event_flags[f], 0); 933302806Ssephe chid_base = f << VMBUS_EVTFLAG_SHIFT; 934302692Ssephe 935302806Ssephe while ((chid_ofs = ffsl(flags)) != 0) { 936302692Ssephe struct hv_vmbus_channel *channel; 937302692Ssephe 938302806Ssephe --chid_ofs; /* NOTE: ffsl is 1-based */ 939302806Ssephe flags &= ~(1UL << chid_ofs); 940302692Ssephe 941302806Ssephe channel = sc->vmbus_chmap[chid_base + chid_ofs]; 942302692Ssephe 943302692Ssephe /* if channel is closed or closing */ 944302692Ssephe if (channel == NULL || channel->rxq == NULL) 945302692Ssephe continue; 946302692Ssephe 947302709Ssephe if (channel->ch_flags & VMBUS_CHAN_FLAG_BATCHREAD) 948302692Ssephe hv_ring_buffer_read_begin(&channel->inbound); 949302692Ssephe taskqueue_enqueue(channel->rxq, &channel->channel_task); 950302692Ssephe } 951302692Ssephe } 952302692Ssephe} 953302692Ssephe 954302692Ssephevoid 955302692Ssephevmbus_event_proc(struct vmbus_softc *sc, int cpu) 956302692Ssephe{ 957302692Ssephe struct vmbus_evtflags *eventf; 958302692Ssephe 959302692Ssephe /* 960302692Ssephe * On Host with Win8 or above, the event page can be checked directly 961302692Ssephe * to get the id of the channel that has the pending interrupt. 962302692Ssephe */ 963302692Ssephe eventf = VMBUS_PCPU_GET(sc, event_flags, cpu) + VMBUS_SINT_MESSAGE; 964302692Ssephe vmbus_event_flags_proc(sc, eventf->evt_flags, 965302692Ssephe VMBUS_PCPU_GET(sc, event_flags_cnt, cpu)); 966302692Ssephe} 967302692Ssephe 968302692Ssephevoid 969302692Ssephevmbus_event_proc_compat(struct vmbus_softc *sc, int cpu) 970302692Ssephe{ 971302692Ssephe struct vmbus_evtflags *eventf; 972302692Ssephe 973302692Ssephe eventf = VMBUS_PCPU_GET(sc, event_flags, cpu) + VMBUS_SINT_MESSAGE; 974302692Ssephe if (atomic_testandclear_long(&eventf->evt_flags[0], 0)) { 975302692Ssephe vmbus_event_flags_proc(sc, sc->vmbus_rx_evtflags, 976302692Ssephe VMBUS_CHAN_MAX_COMPAT >> VMBUS_EVTFLAG_SHIFT); 977302692Ssephe } 978302692Ssephe} 979302692Ssephe 980302692Ssephestatic void 981302692Ssephevmbus_chan_update_evtflagcnt(struct vmbus_softc *sc, 982302692Ssephe const struct hv_vmbus_channel *chan) 983302692Ssephe{ 984302692Ssephe volatile int *flag_cnt_ptr; 985302692Ssephe int flag_cnt; 986302692Ssephe 987302693Ssephe flag_cnt = (chan->ch_id / VMBUS_EVTFLAG_LEN) + 1; 988302692Ssephe flag_cnt_ptr = VMBUS_PCPU_PTR(sc, event_flags_cnt, chan->target_cpu); 989302692Ssephe 990302692Ssephe for (;;) { 991302692Ssephe int old_flag_cnt; 992302692Ssephe 993302692Ssephe old_flag_cnt = *flag_cnt_ptr; 994302692Ssephe if (old_flag_cnt >= flag_cnt) 995302692Ssephe break; 996302692Ssephe if (atomic_cmpset_int(flag_cnt_ptr, old_flag_cnt, flag_cnt)) { 997302692Ssephe if (bootverbose) { 998302692Ssephe device_printf(sc->vmbus_dev, 999302692Ssephe "channel%u update cpu%d flag_cnt to %d\n", 1000302693Ssephe chan->ch_id, 1001302692Ssephe chan->target_cpu, flag_cnt); 1002302692Ssephe } 1003302692Ssephe break; 1004302692Ssephe } 1005302692Ssephe } 1006302692Ssephe} 1007302864Ssephe 1008302864Ssephestatic struct hv_vmbus_channel * 1009302864Ssephevmbus_chan_alloc(struct vmbus_softc *sc) 1010302864Ssephe{ 1011302864Ssephe struct hv_vmbus_channel *chan; 1012302864Ssephe 1013302864Ssephe chan = malloc(sizeof(*chan), M_DEVBUF, M_WAITOK | M_ZERO); 1014302864Ssephe 1015302864Ssephe chan->ch_monprm = hyperv_dmamem_alloc(bus_get_dma_tag(sc->vmbus_dev), 1016302864Ssephe HYPERCALL_PARAM_ALIGN, 0, sizeof(struct hyperv_mon_param), 1017302864Ssephe &chan->ch_monprm_dma, BUS_DMA_WAITOK | BUS_DMA_ZERO); 1018302864Ssephe if (chan->ch_monprm == NULL) { 1019302864Ssephe device_printf(sc->vmbus_dev, "monprm alloc failed\n"); 1020302864Ssephe free(chan, M_DEVBUF); 1021302864Ssephe return NULL; 1022302864Ssephe } 1023302864Ssephe 1024302864Ssephe chan->vmbus_sc = sc; 1025302864Ssephe mtx_init(&chan->ch_subchan_lock, "vmbus subchan", NULL, MTX_DEF); 1026302864Ssephe TAILQ_INIT(&chan->ch_subchans); 1027302864Ssephe TASK_INIT(&chan->ch_detach_task, 0, vmbus_chan_detach_task, chan); 1028302864Ssephe 1029302864Ssephe return chan; 1030302864Ssephe} 1031302864Ssephe 1032302864Ssephestatic void 1033302864Ssephevmbus_chan_free(struct hv_vmbus_channel *chan) 1034302864Ssephe{ 1035302864Ssephe /* TODO: assert sub-channel list is empty */ 1036302864Ssephe /* TODO: asset no longer on the primary channel's sub-channel list */ 1037302864Ssephe /* TODO: asset no longer on the vmbus channel list */ 1038302864Ssephe hyperv_dmamem_free(&chan->ch_monprm_dma, chan->ch_monprm); 1039302864Ssephe mtx_destroy(&chan->ch_subchan_lock); 1040302864Ssephe free(chan, M_DEVBUF); 1041302864Ssephe} 1042302864Ssephe 1043302864Ssephestatic int 1044302864Ssephevmbus_chan_add(struct hv_vmbus_channel *newchan) 1045302864Ssephe{ 1046302864Ssephe struct vmbus_softc *sc = newchan->vmbus_sc; 1047302864Ssephe struct hv_vmbus_channel *prichan; 1048302864Ssephe 1049302864Ssephe if (newchan->ch_id == 0) { 1050302864Ssephe /* 1051302864Ssephe * XXX 1052302864Ssephe * Chan0 will neither be processed nor should be offered; 1053302864Ssephe * skip it. 1054302864Ssephe */ 1055302864Ssephe device_printf(sc->vmbus_dev, "got chan0 offer, discard\n"); 1056302864Ssephe return EINVAL; 1057302864Ssephe } else if (newchan->ch_id >= VMBUS_CHAN_MAX) { 1058302864Ssephe device_printf(sc->vmbus_dev, "invalid chan%u offer\n", 1059302864Ssephe newchan->ch_id); 1060302864Ssephe return EINVAL; 1061302864Ssephe } 1062302864Ssephe sc->vmbus_chmap[newchan->ch_id] = newchan; 1063302864Ssephe 1064302864Ssephe if (bootverbose) { 1065302864Ssephe device_printf(sc->vmbus_dev, "chan%u subidx%u offer\n", 1066302864Ssephe newchan->ch_id, newchan->ch_subidx); 1067302864Ssephe } 1068302864Ssephe 1069302864Ssephe mtx_lock(&sc->vmbus_prichan_lock); 1070302864Ssephe TAILQ_FOREACH(prichan, &sc->vmbus_prichans, ch_prilink) { 1071302864Ssephe /* 1072302864Ssephe * Sub-channel will have the same type GUID and instance 1073302864Ssephe * GUID as its primary channel. 1074302864Ssephe */ 1075302864Ssephe if (memcmp(&prichan->ch_guid_type, &newchan->ch_guid_type, 1076302864Ssephe sizeof(struct hyperv_guid)) == 0 && 1077302864Ssephe memcmp(&prichan->ch_guid_inst, &newchan->ch_guid_inst, 1078302864Ssephe sizeof(struct hyperv_guid)) == 0) 1079302864Ssephe break; 1080302864Ssephe } 1081302864Ssephe if (VMBUS_CHAN_ISPRIMARY(newchan)) { 1082302864Ssephe if (prichan == NULL) { 1083302864Ssephe /* Install the new primary channel */ 1084302864Ssephe TAILQ_INSERT_TAIL(&sc->vmbus_prichans, newchan, 1085302864Ssephe ch_prilink); 1086302864Ssephe mtx_unlock(&sc->vmbus_prichan_lock); 1087302864Ssephe return 0; 1088302864Ssephe } else { 1089302864Ssephe mtx_unlock(&sc->vmbus_prichan_lock); 1090302864Ssephe device_printf(sc->vmbus_dev, "duplicated primary " 1091302864Ssephe "chan%u\n", newchan->ch_id); 1092302864Ssephe return EINVAL; 1093302864Ssephe } 1094302864Ssephe } else { /* Sub-channel */ 1095302864Ssephe if (prichan == NULL) { 1096302864Ssephe mtx_unlock(&sc->vmbus_prichan_lock); 1097302864Ssephe device_printf(sc->vmbus_dev, "no primary chan for " 1098302864Ssephe "chan%u\n", newchan->ch_id); 1099302864Ssephe return EINVAL; 1100302864Ssephe } 1101302864Ssephe /* 1102302864Ssephe * Found the primary channel for this sub-channel and 1103302864Ssephe * move on. 1104302864Ssephe * 1105302864Ssephe * XXX refcnt prichan 1106302864Ssephe */ 1107302864Ssephe } 1108302864Ssephe mtx_unlock(&sc->vmbus_prichan_lock); 1109302864Ssephe 1110302864Ssephe /* 1111302864Ssephe * This is a sub-channel; link it with the primary channel. 1112302864Ssephe */ 1113302864Ssephe KASSERT(!VMBUS_CHAN_ISPRIMARY(newchan), 1114302864Ssephe ("new channel is not sub-channel")); 1115302864Ssephe KASSERT(prichan != NULL, ("no primary channel")); 1116302864Ssephe 1117302864Ssephe newchan->ch_prichan = prichan; 1118302864Ssephe newchan->ch_dev = prichan->ch_dev; 1119302864Ssephe 1120302864Ssephe mtx_lock(&prichan->ch_subchan_lock); 1121302864Ssephe TAILQ_INSERT_TAIL(&prichan->ch_subchans, newchan, ch_sublink); 1122302864Ssephe /* 1123302864Ssephe * Bump up sub-channel count and notify anyone that is 1124302864Ssephe * interested in this sub-channel, after this sub-channel 1125302864Ssephe * is setup. 1126302864Ssephe */ 1127302864Ssephe prichan->ch_subchan_cnt++; 1128302864Ssephe mtx_unlock(&prichan->ch_subchan_lock); 1129302864Ssephe wakeup(prichan); 1130302864Ssephe 1131302864Ssephe return 0; 1132302864Ssephe} 1133302864Ssephe 1134302864Ssephevoid 1135302864Ssephevmbus_channel_cpu_set(struct hv_vmbus_channel *chan, int cpu) 1136302864Ssephe{ 1137302864Ssephe KASSERT(cpu >= 0 && cpu < mp_ncpus, ("invalid cpu %d", cpu)); 1138302864Ssephe 1139302864Ssephe if (chan->vmbus_sc->vmbus_version == VMBUS_VERSION_WS2008 || 1140302864Ssephe chan->vmbus_sc->vmbus_version == VMBUS_VERSION_WIN7) { 1141302864Ssephe /* Only cpu0 is supported */ 1142302864Ssephe cpu = 0; 1143302864Ssephe } 1144302864Ssephe 1145302864Ssephe chan->target_cpu = cpu; 1146302864Ssephe chan->target_vcpu = VMBUS_PCPU_GET(chan->vmbus_sc, vcpuid, cpu); 1147302864Ssephe 1148302864Ssephe if (bootverbose) { 1149302864Ssephe printf("vmbus_chan%u: assigned to cpu%u [vcpu%u]\n", 1150302864Ssephe chan->ch_id, 1151302864Ssephe chan->target_cpu, chan->target_vcpu); 1152302864Ssephe } 1153302864Ssephe} 1154302864Ssephe 1155302864Ssephevoid 1156302864Ssephevmbus_channel_cpu_rr(struct hv_vmbus_channel *chan) 1157302864Ssephe{ 1158302864Ssephe static uint32_t vmbus_chan_nextcpu; 1159302864Ssephe int cpu; 1160302864Ssephe 1161302864Ssephe cpu = atomic_fetchadd_int(&vmbus_chan_nextcpu, 1) % mp_ncpus; 1162302864Ssephe vmbus_channel_cpu_set(chan, cpu); 1163302864Ssephe} 1164302864Ssephe 1165302864Ssephestatic void 1166302864Ssephevmbus_chan_cpu_default(struct hv_vmbus_channel *chan) 1167302864Ssephe{ 1168302864Ssephe /* 1169302864Ssephe * By default, pin the channel to cpu0. Devices having 1170302864Ssephe * special channel-cpu mapping requirement should call 1171302864Ssephe * vmbus_channel_cpu_{set,rr}(). 1172302864Ssephe */ 1173302864Ssephe vmbus_channel_cpu_set(chan, 0); 1174302864Ssephe} 1175302864Ssephe 1176302864Ssephestatic void 1177302864Ssephevmbus_chan_msgproc_choffer(struct vmbus_softc *sc, 1178302864Ssephe const struct vmbus_message *msg) 1179302864Ssephe{ 1180302864Ssephe const struct vmbus_chanmsg_choffer *offer; 1181302864Ssephe struct hv_vmbus_channel *chan; 1182302864Ssephe int error; 1183302864Ssephe 1184302864Ssephe offer = (const struct vmbus_chanmsg_choffer *)msg->msg_data; 1185302864Ssephe 1186302864Ssephe chan = vmbus_chan_alloc(sc); 1187302864Ssephe if (chan == NULL) { 1188302864Ssephe device_printf(sc->vmbus_dev, "allocate chan%u failed\n", 1189302864Ssephe offer->chm_chanid); 1190302864Ssephe return; 1191302864Ssephe } 1192302864Ssephe 1193302864Ssephe chan->ch_id = offer->chm_chanid; 1194302864Ssephe chan->ch_subidx = offer->chm_subidx; 1195302864Ssephe chan->ch_guid_type = offer->chm_chtype; 1196302864Ssephe chan->ch_guid_inst = offer->chm_chinst; 1197302864Ssephe 1198302864Ssephe /* Batch reading is on by default */ 1199302864Ssephe chan->ch_flags |= VMBUS_CHAN_FLAG_BATCHREAD; 1200302864Ssephe 1201302864Ssephe chan->ch_monprm->mp_connid = VMBUS_CONNID_EVENT; 1202302864Ssephe if (sc->vmbus_version != VMBUS_VERSION_WS2008) 1203302864Ssephe chan->ch_monprm->mp_connid = offer->chm_connid; 1204302864Ssephe 1205302864Ssephe if (offer->chm_flags1 & VMBUS_CHOFFER_FLAG1_HASMNF) { 1206302864Ssephe /* 1207302864Ssephe * Setup MNF stuffs. 1208302864Ssephe */ 1209302864Ssephe chan->ch_flags |= VMBUS_CHAN_FLAG_HASMNF; 1210302864Ssephe chan->ch_montrig_idx = offer->chm_montrig / VMBUS_MONTRIG_LEN; 1211302864Ssephe if (chan->ch_montrig_idx >= VMBUS_MONTRIGS_MAX) 1212302864Ssephe panic("invalid monitor trigger %u", offer->chm_montrig); 1213302864Ssephe chan->ch_montrig_mask = 1214302864Ssephe 1 << (offer->chm_montrig % VMBUS_MONTRIG_LEN); 1215302864Ssephe } 1216302864Ssephe 1217302864Ssephe /* Select default cpu for this channel. */ 1218302864Ssephe vmbus_chan_cpu_default(chan); 1219302864Ssephe 1220302864Ssephe error = vmbus_chan_add(chan); 1221302864Ssephe if (error) { 1222302864Ssephe device_printf(sc->vmbus_dev, "add chan%u failed: %d\n", 1223302864Ssephe chan->ch_id, error); 1224302864Ssephe vmbus_chan_free(chan); 1225302864Ssephe return; 1226302864Ssephe } 1227302864Ssephe 1228302864Ssephe if (VMBUS_CHAN_ISPRIMARY(chan)) { 1229302864Ssephe /* 1230302864Ssephe * Add device for this primary channel. 1231302864Ssephe * 1232302864Ssephe * NOTE: 1233302864Ssephe * Error is ignored here; don't have much to do if error 1234302864Ssephe * really happens. 1235302864Ssephe */ 1236302868Ssephe vmbus_add_child(chan); 1237302864Ssephe } 1238302864Ssephe} 1239302864Ssephe 1240302864Ssephe/* 1241302864Ssephe * XXX pretty broken; need rework. 1242302864Ssephe */ 1243302864Ssephestatic void 1244302864Ssephevmbus_chan_msgproc_chrescind(struct vmbus_softc *sc, 1245302864Ssephe const struct vmbus_message *msg) 1246302864Ssephe{ 1247302864Ssephe const struct vmbus_chanmsg_chrescind *note; 1248302864Ssephe struct hv_vmbus_channel *chan; 1249302864Ssephe 1250302864Ssephe note = (const struct vmbus_chanmsg_chrescind *)msg->msg_data; 1251302864Ssephe if (note->chm_chanid > VMBUS_CHAN_MAX) { 1252302864Ssephe device_printf(sc->vmbus_dev, "invalid rescinded chan%u\n", 1253302864Ssephe note->chm_chanid); 1254302864Ssephe return; 1255302864Ssephe } 1256302864Ssephe 1257302864Ssephe if (bootverbose) { 1258302864Ssephe device_printf(sc->vmbus_dev, "chan%u rescinded\n", 1259302864Ssephe note->chm_chanid); 1260302864Ssephe } 1261302864Ssephe 1262302864Ssephe chan = sc->vmbus_chmap[note->chm_chanid]; 1263302864Ssephe if (chan == NULL) 1264302864Ssephe return; 1265302864Ssephe sc->vmbus_chmap[note->chm_chanid] = NULL; 1266302864Ssephe 1267302864Ssephe taskqueue_enqueue(taskqueue_thread, &chan->ch_detach_task); 1268302864Ssephe} 1269302864Ssephe 1270302864Ssephestatic void 1271302864Ssephevmbus_chan_detach_task(void *xchan, int pending __unused) 1272302864Ssephe{ 1273302864Ssephe struct hv_vmbus_channel *chan = xchan; 1274302864Ssephe 1275302864Ssephe if (VMBUS_CHAN_ISPRIMARY(chan)) { 1276302864Ssephe /* Only primary channel owns the device */ 1277302868Ssephe vmbus_delete_child(chan); 1278302864Ssephe /* NOTE: DO NOT free primary channel for now */ 1279302864Ssephe } else { 1280302864Ssephe struct vmbus_softc *sc = chan->vmbus_sc; 1281302864Ssephe struct hv_vmbus_channel *pri_chan = chan->ch_prichan; 1282302864Ssephe struct vmbus_chanmsg_chfree *req; 1283302864Ssephe struct vmbus_msghc *mh; 1284302864Ssephe int error; 1285302864Ssephe 1286302864Ssephe mh = vmbus_msghc_get(sc, sizeof(*req)); 1287302864Ssephe if (mh == NULL) { 1288302864Ssephe device_printf(sc->vmbus_dev, 1289302864Ssephe "can not get msg hypercall for chfree(chan%u)\n", 1290302864Ssephe chan->ch_id); 1291302864Ssephe goto remove; 1292302864Ssephe } 1293302864Ssephe 1294302864Ssephe req = vmbus_msghc_dataptr(mh); 1295302864Ssephe req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CHFREE; 1296302864Ssephe req->chm_chanid = chan->ch_id; 1297302864Ssephe 1298302864Ssephe error = vmbus_msghc_exec_noresult(mh); 1299302864Ssephe vmbus_msghc_put(sc, mh); 1300302864Ssephe 1301302864Ssephe if (error) { 1302302864Ssephe device_printf(sc->vmbus_dev, 1303302864Ssephe "chfree(chan%u) failed: %d", 1304302864Ssephe chan->ch_id, error); 1305302864Ssephe /* NOTE: Move on! */ 1306302864Ssephe } else { 1307302864Ssephe if (bootverbose) { 1308302864Ssephe device_printf(sc->vmbus_dev, "chan%u freed\n", 1309302864Ssephe chan->ch_id); 1310302864Ssephe } 1311302864Ssephe } 1312302864Ssepheremove: 1313302864Ssephe mtx_lock(&pri_chan->ch_subchan_lock); 1314302864Ssephe TAILQ_REMOVE(&pri_chan->ch_subchans, chan, ch_sublink); 1315302864Ssephe KASSERT(pri_chan->ch_subchan_cnt > 0, 1316302864Ssephe ("invalid subchan_cnt %d", pri_chan->ch_subchan_cnt)); 1317302864Ssephe pri_chan->ch_subchan_cnt--; 1318302864Ssephe mtx_unlock(&pri_chan->ch_subchan_lock); 1319302864Ssephe wakeup(pri_chan); 1320302864Ssephe 1321302864Ssephe vmbus_chan_free(chan); 1322302864Ssephe } 1323302864Ssephe} 1324302864Ssephe 1325302864Ssephe/* 1326302864Ssephe * Detach all devices and destroy the corresponding primary channels. 1327302864Ssephe */ 1328302864Ssephevoid 1329302864Ssephevmbus_chan_destroy_all(struct vmbus_softc *sc) 1330302864Ssephe{ 1331302864Ssephe struct hv_vmbus_channel *chan; 1332302864Ssephe 1333302864Ssephe mtx_lock(&sc->vmbus_prichan_lock); 1334302864Ssephe while ((chan = TAILQ_FIRST(&sc->vmbus_prichans)) != NULL) { 1335302864Ssephe KASSERT(VMBUS_CHAN_ISPRIMARY(chan), ("not primary channel")); 1336302864Ssephe TAILQ_REMOVE(&sc->vmbus_prichans, chan, ch_prilink); 1337302864Ssephe mtx_unlock(&sc->vmbus_prichan_lock); 1338302864Ssephe 1339302868Ssephe vmbus_delete_child(chan); 1340302864Ssephe vmbus_chan_free(chan); 1341302864Ssephe 1342302864Ssephe mtx_lock(&sc->vmbus_prichan_lock); 1343302864Ssephe } 1344302864Ssephe bzero(sc->vmbus_chmap, 1345302864Ssephe sizeof(struct hv_vmbus_channel *) * VMBUS_CHAN_MAX); 1346302864Ssephe mtx_unlock(&sc->vmbus_prichan_lock); 1347302864Ssephe} 1348302864Ssephe 1349302864Ssephe/** 1350302864Ssephe * @brief Select the best outgoing channel 1351302864Ssephe * 1352302864Ssephe * The channel whose vcpu binding is closest to the currect vcpu will 1353302864Ssephe * be selected. 1354302864Ssephe * If no multi-channel, always select primary channel 1355302864Ssephe * 1356302864Ssephe * @param primary - primary channel 1357302864Ssephe */ 1358302864Ssephestruct hv_vmbus_channel * 1359302864Ssephevmbus_select_outgoing_channel(struct hv_vmbus_channel *primary) 1360302864Ssephe{ 1361302864Ssephe hv_vmbus_channel *new_channel = NULL; 1362302864Ssephe hv_vmbus_channel *outgoing_channel = primary; 1363302864Ssephe int old_cpu_distance = 0; 1364302864Ssephe int new_cpu_distance = 0; 1365302864Ssephe int cur_vcpu = 0; 1366302864Ssephe int smp_pro_id = PCPU_GET(cpuid); 1367302864Ssephe 1368302864Ssephe if (TAILQ_EMPTY(&primary->ch_subchans)) { 1369302864Ssephe return outgoing_channel; 1370302864Ssephe } 1371302864Ssephe 1372302864Ssephe if (smp_pro_id >= MAXCPU) { 1373302864Ssephe return outgoing_channel; 1374302864Ssephe } 1375302864Ssephe 1376302864Ssephe cur_vcpu = VMBUS_PCPU_GET(primary->vmbus_sc, vcpuid, smp_pro_id); 1377302864Ssephe 1378302864Ssephe /* XXX need lock */ 1379302864Ssephe TAILQ_FOREACH(new_channel, &primary->ch_subchans, ch_sublink) { 1380302864Ssephe if ((new_channel->ch_stflags & VMBUS_CHAN_ST_OPENED) == 0) { 1381302864Ssephe continue; 1382302864Ssephe } 1383302864Ssephe 1384302864Ssephe if (new_channel->target_vcpu == cur_vcpu){ 1385302864Ssephe return new_channel; 1386302864Ssephe } 1387302864Ssephe 1388302864Ssephe old_cpu_distance = ((outgoing_channel->target_vcpu > cur_vcpu) ? 1389302864Ssephe (outgoing_channel->target_vcpu - cur_vcpu) : 1390302864Ssephe (cur_vcpu - outgoing_channel->target_vcpu)); 1391302864Ssephe 1392302864Ssephe new_cpu_distance = ((new_channel->target_vcpu > cur_vcpu) ? 1393302864Ssephe (new_channel->target_vcpu - cur_vcpu) : 1394302864Ssephe (cur_vcpu - new_channel->target_vcpu)); 1395302864Ssephe 1396302864Ssephe if (old_cpu_distance < new_cpu_distance) { 1397302864Ssephe continue; 1398302864Ssephe } 1399302864Ssephe 1400302864Ssephe outgoing_channel = new_channel; 1401302864Ssephe } 1402302864Ssephe 1403302864Ssephe return(outgoing_channel); 1404302864Ssephe} 1405302864Ssephe 1406302864Ssephestruct hv_vmbus_channel ** 1407302864Ssephevmbus_get_subchan(struct hv_vmbus_channel *pri_chan, int subchan_cnt) 1408302864Ssephe{ 1409302864Ssephe struct hv_vmbus_channel **ret, *chan; 1410302864Ssephe int i; 1411302864Ssephe 1412302864Ssephe ret = malloc(subchan_cnt * sizeof(struct hv_vmbus_channel *), M_TEMP, 1413302864Ssephe M_WAITOK); 1414302864Ssephe 1415302864Ssephe mtx_lock(&pri_chan->ch_subchan_lock); 1416302864Ssephe 1417302864Ssephe while (pri_chan->ch_subchan_cnt < subchan_cnt) 1418302864Ssephe mtx_sleep(pri_chan, &pri_chan->ch_subchan_lock, 0, "subch", 0); 1419302864Ssephe 1420302864Ssephe i = 0; 1421302864Ssephe TAILQ_FOREACH(chan, &pri_chan->ch_subchans, ch_sublink) { 1422302864Ssephe /* TODO: refcnt chan */ 1423302864Ssephe ret[i] = chan; 1424302864Ssephe 1425302864Ssephe ++i; 1426302864Ssephe if (i == subchan_cnt) 1427302864Ssephe break; 1428302864Ssephe } 1429302864Ssephe KASSERT(i == subchan_cnt, ("invalid subchan count %d, should be %d", 1430302864Ssephe pri_chan->ch_subchan_cnt, subchan_cnt)); 1431302864Ssephe 1432302864Ssephe mtx_unlock(&pri_chan->ch_subchan_lock); 1433302864Ssephe 1434302864Ssephe return ret; 1435302864Ssephe} 1436302864Ssephe 1437302864Ssephevoid 1438302864Ssephevmbus_rel_subchan(struct hv_vmbus_channel **subchan, int subchan_cnt __unused) 1439302864Ssephe{ 1440302864Ssephe 1441302864Ssephe free(subchan, M_TEMP); 1442302864Ssephe} 1443302864Ssephe 1444302864Ssephevoid 1445302864Ssephevmbus_drain_subchan(struct hv_vmbus_channel *pri_chan) 1446302864Ssephe{ 1447302864Ssephe mtx_lock(&pri_chan->ch_subchan_lock); 1448302864Ssephe while (pri_chan->ch_subchan_cnt > 0) 1449302864Ssephe mtx_sleep(pri_chan, &pri_chan->ch_subchan_lock, 0, "dsubch", 0); 1450302864Ssephe mtx_unlock(&pri_chan->ch_subchan_lock); 1451302864Ssephe} 1452302864Ssephe 1453302864Ssephevoid 1454302864Ssephevmbus_chan_msgproc(struct vmbus_softc *sc, const struct vmbus_message *msg) 1455302864Ssephe{ 1456302864Ssephe vmbus_chanmsg_proc_t msg_proc; 1457302864Ssephe uint32_t msg_type; 1458302864Ssephe 1459302864Ssephe msg_type = ((const struct vmbus_chanmsg_hdr *)msg->msg_data)->chm_type; 1460302864Ssephe KASSERT(msg_type < VMBUS_CHANMSG_TYPE_MAX, 1461302864Ssephe ("invalid message type %u", msg_type)); 1462302864Ssephe 1463302864Ssephe msg_proc = vmbus_chan_msgprocs[msg_type]; 1464302864Ssephe if (msg_proc != NULL) 1465302864Ssephe msg_proc(sc, msg); 1466302864Ssephe} 1467