1 /*- 2 * Copyright (c) 2009-2012 Microsoft Corp. 3 * Copyright (c) 2012 NetApp Inc. 4 * Copyright (c) 2012 Citrix Inc. 5 * Copyright (c) 2016 Mike Belopuhov <mike@esdenera.com> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /* 31 * The OpenBSD port was done under funding by Esdenera Networks GmbH. 32 */ 33 34 #include <sys/param.h> 35 36 /* Hyperv requires locked atomic operations */ 37 #ifndef MULTIPROCESSOR 38 #define _HYPERVMPATOMICS 39 #define MULTIPROCESSOR 40 #endif 41 #include <sys/atomic.h> 42 #ifdef _HYPERVMPATOMICS 43 #undef MULTIPROCESSOR 44 #undef _HYPERVMPATOMICS 45 #endif 46 47 #include <sys/systm.h> 48 #include <sys/proc.h> 49 #include <sys/signal.h> 50 #include <sys/signalvar.h> 51 #include <sys/malloc.h> 52 #include <sys/kernel.h> 53 #include <sys/device.h> 54 #include <sys/timetc.h> 55 #include <sys/task.h> 56 #include <sys/syslog.h> 57 58 #include <machine/bus.h> 59 #include <machine/cpu.h> 60 #include <machine/cpufunc.h> 61 62 #include <uvm/uvm_extern.h> 63 64 #include <machine/i82489var.h> 65 66 #include <dev/pv/pvvar.h> 67 #include <dev/pv/pvreg.h> 68 #include <dev/pv/hypervreg.h> 69 #include <dev/pv/hypervvar.h> 70 71 /* Command submission flags */ 72 #define HCF_SLEEPOK 0x0001 /* M_WAITOK */ 73 #define HCF_NOSLEEP 0x0002 /* M_NOWAIT */ 74 #define HCF_NOREPLY 0x0004 75 76 struct hv_softc *hv_sc; 77 78 int hv_match(struct device *, void *, void *); 79 void hv_attach(struct device *, struct device *, void *); 80 void hv_set_version(struct hv_softc *); 81 u_int hv_gettime(struct timecounter *); 82 int hv_init_hypercall(struct hv_softc *); 83 uint64_t hv_hypercall(struct hv_softc *, uint64_t, void *, void *); 84 int hv_init_interrupts(struct hv_softc *); 85 int hv_init_synic(struct hv_softc *); 86 int hv_cmd(struct hv_softc *, void *, size_t, void *, size_t, int); 87 int hv_start(struct hv_softc *, struct hv_msg *); 88 int hv_reply(struct hv_softc *, struct hv_msg *); 89 void hv_wait(struct hv_softc *, int (*done)(struct hv_softc *, 90 struct hv_msg *), struct hv_msg *, void *, const char *); 91 uint16_t hv_intr_signal(struct hv_softc *, void *); 92 void hv_intr(void); 93 void hv_event_intr(struct hv_softc *); 94 void hv_message_intr(struct hv_softc *); 95 int hv_vmbus_connect(struct hv_softc *); 96 void hv_channel_response(struct hv_softc *, struct vmbus_chanmsg_hdr *); 97 void hv_channel_offer(struct hv_softc *, struct vmbus_chanmsg_hdr *); 98 void hv_channel_rescind(struct hv_softc *, struct vmbus_chanmsg_hdr *); 99 void hv_channel_delivered(struct hv_softc *, struct vmbus_chanmsg_hdr *); 100 int hv_channel_scan(struct hv_softc *); 101 void hv_process_offer(struct hv_softc *, struct hv_offer *); 102 struct hv_channel * 103 hv_channel_lookup(struct hv_softc *, uint32_t); 104 int hv_channel_ring_create(struct hv_channel *, uint32_t); 105 void hv_channel_ring_destroy(struct hv_channel *); 106 void hv_channel_pause(struct hv_channel *); 107 uint hv_channel_unpause(struct hv_channel *); 108 uint hv_channel_ready(struct hv_channel *); 109 extern void hv_attach_icdevs(struct hv_softc *); 110 int hv_attach_devices(struct hv_softc *); 111 112 struct { 113 int hmd_response; 114 int hmd_request; 115 void (*hmd_handler)(struct hv_softc *, 116 struct vmbus_chanmsg_hdr *); 117 } hv_msg_dispatch[] = { 118 { 0, 0, NULL }, 119 { VMBUS_CHANMSG_CHOFFER, 0, hv_channel_offer }, 120 { VMBUS_CHANMSG_CHRESCIND, 0, hv_channel_rescind }, 121 { VMBUS_CHANMSG_CHREQUEST, VMBUS_CHANMSG_CHOFFER, 122 NULL }, 123 { VMBUS_CHANMSG_CHOFFER_DONE, 0, 124 hv_channel_delivered }, 125 { VMBUS_CHANMSG_CHOPEN, 0, NULL }, 126 { VMBUS_CHANMSG_CHOPEN_RESP, VMBUS_CHANMSG_CHOPEN, 127 hv_channel_response }, 128 { VMBUS_CHANMSG_CHCLOSE, 0, NULL }, 129 { VMBUS_CHANMSG_GPADL_CONN, 0, NULL }, 130 { VMBUS_CHANMSG_GPADL_SUBCONN, 0, NULL }, 131 { VMBUS_CHANMSG_GPADL_CONNRESP, VMBUS_CHANMSG_GPADL_CONN, 132 hv_channel_response }, 133 { VMBUS_CHANMSG_GPADL_DISCONN, 0, NULL }, 134 { VMBUS_CHANMSG_GPADL_DISCONNRESP, VMBUS_CHANMSG_GPADL_DISCONN, 135 hv_channel_response }, 136 { VMBUS_CHANMSG_CHFREE, 0, NULL }, 137 { VMBUS_CHANMSG_CONNECT, 0, NULL }, 138 { VMBUS_CHANMSG_CONNECT_RESP, VMBUS_CHANMSG_CONNECT, 139 hv_channel_response }, 140 { VMBUS_CHANMSG_DISCONNECT, 0, NULL }, 141 }; 142 143 struct timecounter hv_timecounter = { 144 .tc_get_timecount = hv_gettime, 145 .tc_poll_pps = 0, 146 .tc_counter_mask = 0xffffffff, 147 .tc_frequency = 10000000, 148 .tc_name = "hyperv", 149 .tc_quality = 9001, 150 .tc_priv = NULL, 151 .tc_user = 0, 152 }; 153 154 struct cfdriver hyperv_cd = { 155 NULL, "hyperv", DV_DULL 156 }; 157 158 const struct cfattach hyperv_ca = { 159 sizeof(struct hv_softc), hv_match, hv_attach 160 }; 161 162 const struct hv_guid hv_guid_network = { 163 { 0x63, 0x51, 0x61, 0xf8, 0x3e, 0xdf, 0xc5, 0x46, 164 0x91, 0x3f, 0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e } 165 }; 166 167 const struct hv_guid hv_guid_ide = { 168 { 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, 169 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 } 170 }; 171 172 const struct hv_guid hv_guid_scsi = { 173 { 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, 174 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f } 175 }; 176 177 const struct hv_guid hv_guid_shutdown = { 178 { 0x31, 0x60, 0x0b, 0x0e, 0x13, 0x52, 0x34, 0x49, 179 0x81, 0x8b, 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb } 180 }; 181 182 const struct hv_guid hv_guid_timesync = { 183 { 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, 184 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf } 185 }; 186 187 const struct hv_guid hv_guid_heartbeat = { 188 { 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, 189 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d } 190 }; 191 192 const struct hv_guid hv_guid_kvp = { 193 { 0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d, 194 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x03, 0xe6 } 195 }; 196 197 #ifdef HYPERV_DEBUG 198 const struct hv_guid hv_guid_vss = { 199 { 0x29, 0x2e, 0xfa, 0x35, 0x23, 0xea, 0x36, 0x42, 200 0x96, 0xae, 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40 } 201 }; 202 203 const struct hv_guid hv_guid_dynmem = { 204 { 0xdc, 0x74, 0x50, 0x52, 0x85, 0x89, 0xe2, 0x46, 205 0x80, 0x57, 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02 } 206 }; 207 208 const struct hv_guid hv_guid_mouse = { 209 { 0x9e, 0xb6, 0xa8, 0xcf, 0x4a, 0x5b, 0xc0, 0x4c, 210 0xb9, 0x8b, 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a } 211 }; 212 213 const struct hv_guid hv_guid_kbd = { 214 { 0x6d, 0xad, 0x12, 0xf9, 0x17, 0x2b, 0xea, 0x48, 215 0xbd, 0x65, 0xf9, 0x27, 0xa6, 0x1c, 0x76, 0x84 } 216 }; 217 218 const struct hv_guid hv_guid_video = { 219 { 0x02, 0x78, 0x0a, 0xda, 0x77, 0xe3, 0xac, 0x4a, 220 0x8e, 0x77, 0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8 } 221 }; 222 223 const struct hv_guid hv_guid_fc = { 224 { 0x4a, 0xcc, 0x9b, 0x2f, 0x69, 0x00, 0xf3, 0x4a, 225 0xb7, 0x6b, 0x6f, 0xd0, 0xbe, 0x52, 0x8c, 0xda } 226 }; 227 228 const struct hv_guid hv_guid_fcopy = { 229 { 0xe3, 0x4b, 0xd1, 0x34, 0xe4, 0xde, 0xc8, 0x41, 230 0x9a, 0xe7, 0x6b, 0x17, 0x49, 0x77, 0xc1, 0x92 } 231 }; 232 233 const struct hv_guid hv_guid_pcie = { 234 { 0x1d, 0xf6, 0xc4, 0x44, 0x44, 0x44, 0x00, 0x44, 235 0x9d, 0x52, 0x80, 0x2e, 0x27, 0xed, 0xe1, 0x9f } 236 }; 237 238 const struct hv_guid hv_guid_netdir = { 239 { 0x3d, 0xaf, 0x2e, 0x8c, 0xa7, 0x32, 0x09, 0x4b, 240 0xab, 0x99, 0xbd, 0x1f, 0x1c, 0x86, 0xb5, 0x01 } 241 }; 242 243 const struct hv_guid hv_guid_rdesktop = { 244 { 0xf4, 0xac, 0x6a, 0x27, 0x15, 0xac, 0x6c, 0x42, 245 0x98, 0xdd, 0x75, 0x21, 0xad, 0x3f, 0x01, 0xfe } 246 }; 247 248 /* Automatic Virtual Machine Activation (AVMA) Services */ 249 const struct hv_guid hv_guid_avma1 = { 250 { 0x55, 0xb2, 0x87, 0x44, 0x8c, 0xb8, 0x3f, 0x40, 251 0xbb, 0x51, 0xd1, 0xf6, 0x9c, 0xf1, 0x7f, 0x87 } 252 }; 253 254 const struct hv_guid hv_guid_avma2 = { 255 { 0xf4, 0xba, 0x75, 0x33, 0x15, 0x9e, 0x30, 0x4b, 256 0xb7, 0x65, 0x67, 0xac, 0xb1, 0x0d, 0x60, 0x7b } 257 }; 258 259 const struct hv_guid hv_guid_avma3 = { 260 { 0xa0, 0x1f, 0x22, 0x99, 0xad, 0x24, 0xe2, 0x11, 261 0xbe, 0x98, 0x00, 0x1a, 0xa0, 0x1b, 0xbf, 0x6e } 262 }; 263 264 const struct hv_guid hv_guid_avma4 = { 265 { 0x16, 0x57, 0xe6, 0xf8, 0xb3, 0x3c, 0x06, 0x4a, 266 0x9a, 0x60, 0x18, 0x89, 0xc5, 0xcc, 0xca, 0xb5 } 267 }; 268 #endif /* HYPERV_DEBUG */ 269 270 int 271 hv_match(struct device *parent, void *match, void *aux) 272 { 273 struct pv_attach_args *pva = aux; 274 struct pvbus_hv *hv = &pva->pva_hv[PVBUS_HYPERV]; 275 276 if ((hv->hv_major == 0 && hv->hv_minor == 0) || hv->hv_base == 0) 277 return (0); 278 279 return (1); 280 } 281 282 void 283 hv_attach(struct device *parent, struct device *self, void *aux) 284 { 285 struct hv_softc *sc = (struct hv_softc *)self; 286 struct pv_attach_args *pva = aux; 287 struct pvbus_hv *hv = &pva->pva_hv[PVBUS_HYPERV]; 288 289 sc->sc_pvbus = hv; 290 sc->sc_dmat = pva->pva_dmat; 291 292 if (!(hv->hv_features & CPUID_HV_MSR_HYPERCALL) || 293 !(hv->hv_features & CPUID_HV_MSR_SYNIC)) { 294 printf(": not functional\n"); 295 return; 296 } 297 298 DPRINTF("\n"); 299 300 hv_set_version(sc); 301 302 if (hv->hv_features & CPUID_HV_MSR_TIME_REFCNT) 303 tc_init(&hv_timecounter); 304 305 if (hv_init_hypercall(sc)) 306 return; 307 308 /* Wire it up to the global */ 309 hv_sc = sc; 310 311 if (hv_init_interrupts(sc)) 312 return; 313 314 if (hv_vmbus_connect(sc)) 315 return; 316 317 DPRINTF("%s", sc->sc_dev.dv_xname); 318 printf(": protocol %d.%d, features %#x\n", 319 VMBUS_VERSION_MAJOR(sc->sc_proto), 320 VMBUS_VERSION_MINOR(sc->sc_proto), 321 hv->hv_features); 322 323 if (hv_channel_scan(sc)) 324 return; 325 326 /* Attach heartbeat, KVP and other "internal" services */ 327 hv_attach_icdevs(sc); 328 329 /* Attach devices with external drivers */ 330 hv_attach_devices(sc); 331 } 332 333 void 334 hv_set_version(struct hv_softc *sc) 335 { 336 uint64_t ver; 337 338 /* OpenBSD build date */ 339 ver = MSR_HV_GUESTID_OSTYPE_OPENBSD; 340 ver |= (uint64_t)OpenBSD << MSR_HV_GUESTID_VERSION_SHIFT; 341 wrmsr(MSR_HV_GUEST_OS_ID, ver); 342 } 343 344 u_int 345 hv_gettime(struct timecounter *tc) 346 { 347 u_int now = rdmsr(MSR_HV_TIME_REF_COUNT); 348 349 return (now); 350 } 351 352 int 353 hv_init_hypercall(struct hv_softc *sc) 354 { 355 extern void *hv_hypercall_page; 356 uint64_t msr; 357 paddr_t pa; 358 359 sc->sc_hc = &hv_hypercall_page; 360 361 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_hc, &pa)) { 362 printf(": hypercall page PA extraction failed\n"); 363 return (-1); 364 } 365 366 msr = (atop(pa) << MSR_HV_HYPERCALL_PGSHIFT) | MSR_HV_HYPERCALL_ENABLE; 367 wrmsr(MSR_HV_HYPERCALL, msr); 368 369 if (!(rdmsr(MSR_HV_HYPERCALL) & MSR_HV_HYPERCALL_ENABLE)) { 370 printf(": failed to set up a hypercall page\n"); 371 return (-1); 372 } 373 374 return (0); 375 } 376 377 uint64_t 378 hv_hypercall(struct hv_softc *sc, uint64_t control, void *input, 379 void *output) 380 { 381 paddr_t input_pa = 0, output_pa = 0; 382 uint64_t status = 0; 383 384 if (input != NULL && 385 pmap_extract(pmap_kernel(), (vaddr_t)input, &input_pa) == 0) { 386 printf("%s: hypercall input PA extraction failed\n", 387 sc->sc_dev.dv_xname); 388 return (~HYPERCALL_STATUS_SUCCESS); 389 } 390 391 if (output != NULL && 392 pmap_extract(pmap_kernel(), (vaddr_t)output, &output_pa) == 0) { 393 printf("%s: hypercall output PA extraction failed\n", 394 sc->sc_dev.dv_xname); 395 return (~HYPERCALL_STATUS_SUCCESS); 396 } 397 398 #ifdef __amd64__ 399 __asm__ __volatile__ ("mov %0, %%r8" : : "r" (output_pa) : "r8"); 400 __asm__ __volatile__ ("call *%3" : "=a" (status) : "c" (control), 401 "d" (input_pa), "m" (sc->sc_hc)); 402 #else /* __i386__ */ 403 { 404 uint32_t control_hi = control >> 32; 405 uint32_t control_lo = control & 0xfffffffff; 406 uint32_t status_hi = 1; 407 uint32_t status_lo = 1; 408 409 __asm__ __volatile__ ("call *%8" : 410 "=d" (status_hi), "=a"(status_lo) : 411 "d" (control_hi), "a" (control_lo), 412 "b" (0), "c" (input_pa), "D" (0), "S" (output_pa), 413 "m" (sc->sc_hc)); 414 415 status = status_lo | ((uint64_t)status_hi << 32); 416 } 417 #endif /* __amd64__ */ 418 419 return (status); 420 } 421 422 int 423 hv_init_interrupts(struct hv_softc *sc) 424 { 425 struct cpu_info *ci = curcpu(); 426 int cpu = CPU_INFO_UNIT(ci); 427 428 sc->sc_idtvec = LAPIC_HYPERV_VECTOR; 429 430 TAILQ_INIT(&sc->sc_reqs); 431 mtx_init(&sc->sc_reqlck, IPL_NET); 432 433 TAILQ_INIT(&sc->sc_rsps); 434 mtx_init(&sc->sc_rsplck, IPL_NET); 435 436 sc->sc_simp[cpu] = km_alloc(PAGE_SIZE, &kv_any, &kp_zero, &kd_nowait); 437 if (sc->sc_simp[cpu] == NULL) { 438 printf(": failed to allocate SIMP\n"); 439 return (-1); 440 } 441 442 sc->sc_siep[cpu] = km_alloc(PAGE_SIZE, &kv_any, &kp_zero, &kd_nowait); 443 if (sc->sc_siep[cpu] == NULL) { 444 printf(": failed to allocate SIEP\n"); 445 km_free(sc->sc_simp[cpu], PAGE_SIZE, &kv_any, &kp_zero); 446 return (-1); 447 } 448 449 sc->sc_proto = VMBUS_VERSION_WS2008; 450 451 return (hv_init_synic(sc)); 452 } 453 454 int 455 hv_init_synic(struct hv_softc *sc) 456 { 457 struct cpu_info *ci = curcpu(); 458 int cpu = CPU_INFO_UNIT(ci); 459 uint64_t simp, siefp, sctrl, sint; 460 paddr_t pa; 461 462 /* 463 * Setup the Synic's message page 464 */ 465 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_simp[cpu], &pa)) { 466 printf(": SIMP PA extraction failed\n"); 467 return (-1); 468 } 469 simp = rdmsr(MSR_HV_SIMP); 470 simp &= (1 << MSR_HV_SIMP_PGSHIFT) - 1; 471 simp |= (atop(pa) << MSR_HV_SIMP_PGSHIFT); 472 simp |= MSR_HV_SIMP_ENABLE; 473 wrmsr(MSR_HV_SIMP, simp); 474 475 /* 476 * Setup the Synic's event page 477 */ 478 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_siep[cpu], &pa)) { 479 printf(": SIEP PA extraction failed\n"); 480 return (-1); 481 } 482 siefp = rdmsr(MSR_HV_SIEFP); 483 siefp &= (1<<MSR_HV_SIEFP_PGSHIFT) - 1; 484 siefp |= (atop(pa) << MSR_HV_SIEFP_PGSHIFT); 485 siefp |= MSR_HV_SIEFP_ENABLE; 486 wrmsr(MSR_HV_SIEFP, siefp); 487 488 /* 489 * Configure and unmask SINT for message and event flags 490 */ 491 sint = rdmsr(MSR_HV_SINT0 + VMBUS_SINT_MESSAGE); 492 sint = sc->sc_idtvec | MSR_HV_SINT_AUTOEOI | 493 (sint & MSR_HV_SINT_RSVD_MASK); 494 wrmsr(MSR_HV_SINT0 + VMBUS_SINT_MESSAGE, sint); 495 496 /* Enable the global synic bit */ 497 sctrl = rdmsr(MSR_HV_SCONTROL); 498 sctrl |= MSR_HV_SCTRL_ENABLE; 499 wrmsr(MSR_HV_SCONTROL, sctrl); 500 501 sc->sc_vcpus[cpu] = rdmsr(MSR_HV_VP_INDEX); 502 503 DPRINTF("vcpu%u: SIMP %#llx SIEFP %#llx SCTRL %#llx\n", 504 sc->sc_vcpus[cpu], simp, siefp, sctrl); 505 506 return (0); 507 } 508 509 int 510 hv_cmd(struct hv_softc *sc, void *cmd, size_t cmdlen, void *rsp, 511 size_t rsplen, int flags) 512 { 513 struct hv_msg msg; 514 int rv; 515 516 if (cmdlen > VMBUS_MSG_DSIZE_MAX) { 517 printf("%s: payload too large (%lu)\n", sc->sc_dev.dv_xname, 518 cmdlen); 519 return (EMSGSIZE); 520 } 521 522 memset(&msg, 0, sizeof(msg)); 523 524 msg.msg_req.hc_dsize = cmdlen; 525 memcpy(msg.msg_req.hc_data, cmd, cmdlen); 526 527 if (!(flags & HCF_NOREPLY)) { 528 msg.msg_rsp = rsp; 529 msg.msg_rsplen = rsplen; 530 } else 531 msg.msg_flags |= MSGF_NOQUEUE; 532 533 if (flags & HCF_NOSLEEP) 534 msg.msg_flags |= MSGF_NOSLEEP; 535 536 if ((rv = hv_start(sc, &msg)) != 0) 537 return (rv); 538 return (hv_reply(sc, &msg)); 539 } 540 541 int 542 hv_start(struct hv_softc *sc, struct hv_msg *msg) 543 { 544 const int delays[] = { 100, 100, 100, 500, 500, 5000, 5000, 5000 }; 545 const char *wchan = "hvstart"; 546 uint16_t status; 547 int i, s; 548 549 msg->msg_req.hc_connid = VMBUS_CONNID_MESSAGE; 550 msg->msg_req.hc_msgtype = 1; 551 552 if (!(msg->msg_flags & MSGF_NOQUEUE)) { 553 mtx_enter(&sc->sc_reqlck); 554 TAILQ_INSERT_TAIL(&sc->sc_reqs, msg, msg_entry); 555 mtx_leave(&sc->sc_reqlck); 556 } 557 558 for (i = 0; i < nitems(delays); i++) { 559 status = hv_hypercall(sc, HYPERCALL_POST_MESSAGE, 560 &msg->msg_req, NULL); 561 if (status == HYPERCALL_STATUS_SUCCESS) 562 break; 563 if (msg->msg_flags & MSGF_NOSLEEP) { 564 delay(delays[i]); 565 s = splnet(); 566 hv_intr(); 567 splx(s); 568 } else { 569 tsleep_nsec(wchan, PRIBIO, wchan, 570 USEC_TO_NSEC(delays[i])); 571 } 572 } 573 if (status != 0) { 574 printf("%s: posting vmbus message failed with %d\n", 575 sc->sc_dev.dv_xname, status); 576 if (!(msg->msg_flags & MSGF_NOQUEUE)) { 577 mtx_enter(&sc->sc_reqlck); 578 TAILQ_REMOVE(&sc->sc_reqs, msg, msg_entry); 579 mtx_leave(&sc->sc_reqlck); 580 } 581 return (EIO); 582 } 583 584 return (0); 585 } 586 587 static int 588 hv_reply_done(struct hv_softc *sc, struct hv_msg *msg) 589 { 590 struct hv_msg *m; 591 592 mtx_enter(&sc->sc_rsplck); 593 TAILQ_FOREACH(m, &sc->sc_rsps, msg_entry) { 594 if (m == msg) { 595 mtx_leave(&sc->sc_rsplck); 596 return (1); 597 } 598 } 599 mtx_leave(&sc->sc_rsplck); 600 return (0); 601 } 602 603 int 604 hv_reply(struct hv_softc *sc, struct hv_msg *msg) 605 { 606 if (msg->msg_flags & MSGF_NOQUEUE) 607 return (0); 608 609 hv_wait(sc, hv_reply_done, msg, msg, "hvreply"); 610 611 mtx_enter(&sc->sc_rsplck); 612 TAILQ_REMOVE(&sc->sc_rsps, msg, msg_entry); 613 mtx_leave(&sc->sc_rsplck); 614 615 return (0); 616 } 617 618 void 619 hv_wait(struct hv_softc *sc, int (*cond)(struct hv_softc *, struct hv_msg *), 620 struct hv_msg *msg, void *wchan, const char *wmsg) 621 { 622 int s; 623 624 KASSERT(cold ? msg->msg_flags & MSGF_NOSLEEP : 1); 625 626 while (!cond(sc, msg)) { 627 if (msg->msg_flags & MSGF_NOSLEEP) { 628 delay(1000); 629 s = splnet(); 630 hv_intr(); 631 splx(s); 632 } else { 633 tsleep_nsec(wchan, PRIBIO, wmsg ? wmsg : "hvwait", 634 USEC_TO_NSEC(1000)); 635 } 636 } 637 } 638 639 uint16_t 640 hv_intr_signal(struct hv_softc *sc, void *con) 641 { 642 uint64_t status; 643 644 status = hv_hypercall(sc, HYPERCALL_SIGNAL_EVENT, con, NULL); 645 return ((uint16_t)status); 646 } 647 648 void 649 hv_intr(void) 650 { 651 struct hv_softc *sc = hv_sc; 652 653 hv_event_intr(sc); 654 hv_message_intr(sc); 655 } 656 657 void 658 hv_event_intr(struct hv_softc *sc) 659 { 660 struct vmbus_evtflags *evt; 661 struct cpu_info *ci = curcpu(); 662 int cpu = CPU_INFO_UNIT(ci); 663 int bit, row, maxrow, chanid; 664 struct hv_channel *ch; 665 u_long *revents, pending; 666 667 evt = (struct vmbus_evtflags *)sc->sc_siep[cpu] + 668 VMBUS_SINT_MESSAGE; 669 if ((sc->sc_proto == VMBUS_VERSION_WS2008) || 670 (sc->sc_proto == VMBUS_VERSION_WIN7)) { 671 if (!test_bit(0, &evt->evt_flags[0])) 672 return; 673 clear_bit(0, &evt->evt_flags[0]); 674 maxrow = VMBUS_CHAN_MAX_COMPAT / VMBUS_EVTFLAG_LEN; 675 /* 676 * receive size is 1/2 page and divide that by 4 bytes 677 */ 678 revents = sc->sc_revents; 679 } else { 680 maxrow = nitems(evt->evt_flags); 681 /* 682 * On Host with Win8 or above, the event page can be 683 * checked directly to get the id of the channel 684 * that has the pending interrupt. 685 */ 686 revents = &evt->evt_flags[0]; 687 } 688 689 for (row = 0; row < maxrow; row++) { 690 if (revents[row] == 0) 691 continue; 692 pending = atomic_swap_ulong(&revents[row], 0); 693 for (bit = 0; pending > 0; pending >>= 1, bit++) { 694 if ((pending & 1) == 0) 695 continue; 696 chanid = (row * LONG_BIT) + bit; 697 /* vmbus channel protocol message */ 698 if (chanid == 0) 699 continue; 700 ch = hv_channel_lookup(sc, chanid); 701 if (ch == NULL) { 702 printf("%s: unhandled event on %d\n", 703 sc->sc_dev.dv_xname, chanid); 704 continue; 705 } 706 if (ch->ch_state != HV_CHANSTATE_OPENED) { 707 printf("%s: channel %d is not active\n", 708 sc->sc_dev.dv_xname, chanid); 709 continue; 710 } 711 ch->ch_evcnt.ec_count++; 712 hv_channel_schedule(ch); 713 } 714 } 715 } 716 717 void 718 hv_message_intr(struct hv_softc *sc) 719 { 720 struct vmbus_message *msg; 721 struct vmbus_chanmsg_hdr *hdr; 722 struct cpu_info *ci = curcpu(); 723 int cpu = CPU_INFO_UNIT(ci); 724 725 for (;;) { 726 msg = (struct vmbus_message *)sc->sc_simp[cpu] + 727 VMBUS_SINT_MESSAGE; 728 if (msg->msg_type == VMBUS_MSGTYPE_NONE) 729 break; 730 731 hdr = (struct vmbus_chanmsg_hdr *)msg->msg_data; 732 if (hdr->chm_type >= VMBUS_CHANMSG_COUNT) { 733 printf("%s: unhandled message type %u flags %#x\n", 734 sc->sc_dev.dv_xname, hdr->chm_type, 735 msg->msg_flags); 736 goto skip; 737 } 738 if (hv_msg_dispatch[hdr->chm_type].hmd_handler) 739 hv_msg_dispatch[hdr->chm_type].hmd_handler(sc, hdr); 740 else 741 printf("%s: unhandled message type %u\n", 742 sc->sc_dev.dv_xname, hdr->chm_type); 743 skip: 744 msg->msg_type = VMBUS_MSGTYPE_NONE; 745 virtio_membar_sync(); 746 if (msg->msg_flags & VMBUS_MSGFLAG_PENDING) 747 wrmsr(MSR_HV_EOM, 0); 748 } 749 } 750 751 void 752 hv_channel_response(struct hv_softc *sc, struct vmbus_chanmsg_hdr *rsphdr) 753 { 754 struct hv_msg *msg; 755 struct vmbus_chanmsg_hdr *reqhdr; 756 int req; 757 758 req = hv_msg_dispatch[rsphdr->chm_type].hmd_request; 759 mtx_enter(&sc->sc_reqlck); 760 TAILQ_FOREACH(msg, &sc->sc_reqs, msg_entry) { 761 reqhdr = (struct vmbus_chanmsg_hdr *)&msg->msg_req.hc_data; 762 if (reqhdr->chm_type == req) { 763 TAILQ_REMOVE(&sc->sc_reqs, msg, msg_entry); 764 break; 765 } 766 } 767 mtx_leave(&sc->sc_reqlck); 768 if (msg != NULL) { 769 memcpy(msg->msg_rsp, rsphdr, msg->msg_rsplen); 770 mtx_enter(&sc->sc_rsplck); 771 TAILQ_INSERT_TAIL(&sc->sc_rsps, msg, msg_entry); 772 mtx_leave(&sc->sc_rsplck); 773 wakeup(msg); 774 } 775 } 776 777 void 778 hv_channel_offer(struct hv_softc *sc, struct vmbus_chanmsg_hdr *hdr) 779 { 780 struct hv_offer *co; 781 782 co = malloc(sizeof(*co), M_DEVBUF, M_NOWAIT | M_ZERO); 783 if (co == NULL) { 784 printf("%s: failed to allocate an offer object\n", 785 sc->sc_dev.dv_xname); 786 return; 787 } 788 789 memcpy(&co->co_chan, hdr, sizeof(co->co_chan)); 790 791 mtx_enter(&sc->sc_offerlck); 792 SIMPLEQ_INSERT_TAIL(&sc->sc_offers, co, co_entry); 793 mtx_leave(&sc->sc_offerlck); 794 } 795 796 void 797 hv_channel_rescind(struct hv_softc *sc, struct vmbus_chanmsg_hdr *hdr) 798 { 799 const struct vmbus_chanmsg_chrescind *cmd; 800 801 cmd = (const struct vmbus_chanmsg_chrescind *)hdr; 802 printf("%s: revoking channel %u\n", sc->sc_dev.dv_xname, 803 cmd->chm_chanid); 804 } 805 806 void 807 hv_channel_delivered(struct hv_softc *sc, struct vmbus_chanmsg_hdr *hdr) 808 { 809 atomic_setbits_int(&sc->sc_flags, HSF_OFFERS_DELIVERED); 810 wakeup(&sc->sc_offers); 811 } 812 813 int 814 hv_vmbus_connect(struct hv_softc *sc) 815 { 816 const uint32_t versions[] = { 817 VMBUS_VERSION_WIN10, 818 VMBUS_VERSION_WIN8_1, VMBUS_VERSION_WIN8, 819 VMBUS_VERSION_WIN7, VMBUS_VERSION_WS2008 820 }; 821 struct vmbus_chanmsg_connect cmd; 822 struct vmbus_chanmsg_connect_resp rsp; 823 paddr_t epa, mpa1, mpa2; 824 int i; 825 826 sc->sc_events = km_alloc(PAGE_SIZE, &kv_any, &kp_zero, &kd_nowait); 827 if (sc->sc_events == NULL) { 828 printf(": failed to allocate channel port events page\n"); 829 goto errout; 830 } 831 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_events, &epa)) { 832 printf(": channel port events page PA extraction failed\n"); 833 goto errout; 834 } 835 836 sc->sc_wevents = (u_long *)sc->sc_events; 837 sc->sc_revents = (u_long *)((caddr_t)sc->sc_events + (PAGE_SIZE >> 1)); 838 839 sc->sc_monitor[0] = km_alloc(PAGE_SIZE, &kv_any, &kp_zero, &kd_nowait); 840 if (sc->sc_monitor[0] == NULL) { 841 printf(": failed to allocate monitor page 1\n"); 842 goto errout; 843 } 844 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_monitor[0], &mpa1)) { 845 printf(": monitor page 1 PA extraction failed\n"); 846 goto errout; 847 } 848 849 sc->sc_monitor[1] = km_alloc(PAGE_SIZE, &kv_any, &kp_zero, &kd_nowait); 850 if (sc->sc_monitor[1] == NULL) { 851 printf(": failed to allocate monitor page 2\n"); 852 goto errout; 853 } 854 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_monitor[1], &mpa2)) { 855 printf(": monitor page 2 PA extraction failed\n"); 856 goto errout; 857 } 858 859 memset(&cmd, 0, sizeof(cmd)); 860 cmd.chm_hdr.chm_type = VMBUS_CHANMSG_CONNECT; 861 cmd.chm_evtflags = (uint64_t)epa; 862 cmd.chm_mnf1 = (uint64_t)mpa1; 863 cmd.chm_mnf2 = (uint64_t)mpa2; 864 865 memset(&rsp, 0, sizeof(rsp)); 866 867 for (i = 0; i < nitems(versions); i++) { 868 cmd.chm_ver = versions[i]; 869 if (hv_cmd(sc, &cmd, sizeof(cmd), &rsp, sizeof(rsp), 870 HCF_NOSLEEP)) { 871 DPRINTF("%s: CONNECT failed\n", 872 sc->sc_dev.dv_xname); 873 goto errout; 874 } 875 if (rsp.chm_done) { 876 sc->sc_flags |= HSF_CONNECTED; 877 sc->sc_proto = versions[i]; 878 sc->sc_handle = VMBUS_GPADL_START; 879 break; 880 } 881 } 882 if (i == nitems(versions)) { 883 printf("%s: failed to negotiate protocol version\n", 884 sc->sc_dev.dv_xname); 885 goto errout; 886 } 887 888 return (0); 889 890 errout: 891 if (sc->sc_events) { 892 km_free(sc->sc_events, PAGE_SIZE, &kv_any, &kp_zero); 893 sc->sc_events = NULL; 894 sc->sc_wevents = NULL; 895 sc->sc_revents = NULL; 896 } 897 if (sc->sc_monitor[0]) { 898 km_free(sc->sc_monitor[0], PAGE_SIZE, &kv_any, &kp_zero); 899 sc->sc_monitor[0] = NULL; 900 } 901 if (sc->sc_monitor[1]) { 902 km_free(sc->sc_monitor[1], PAGE_SIZE, &kv_any, &kp_zero); 903 sc->sc_monitor[1] = NULL; 904 } 905 return (-1); 906 } 907 908 #ifdef HYPERV_DEBUG 909 static inline char * 910 guidprint(struct hv_guid *a) 911 { 912 /* 3 0 5 4 7 6 8 9 10 15 */ 913 /* 33221100-5544-7766-9988-FFEEDDCCBBAA */ 914 static char buf[16 * 2 + 4 + 1]; 915 int i, j = 0; 916 917 for (i = 3; i != -1; i -= 1, j += 2) 918 snprintf(&buf[j], 3, "%02x", (uint8_t)a->data[i]); 919 buf[j++] = '-'; 920 for (i = 5; i != 3; i -= 1, j += 2) 921 snprintf(&buf[j], 3, "%02x", (uint8_t)a->data[i]); 922 buf[j++] = '-'; 923 for (i = 7; i != 5; i -= 1, j += 2) 924 snprintf(&buf[j], 3, "%02x", (uint8_t)a->data[i]); 925 buf[j++] = '-'; 926 for (i = 8; i < 10; i += 1, j += 2) 927 snprintf(&buf[j], 3, "%02x", (uint8_t)a->data[i]); 928 buf[j++] = '-'; 929 for (i = 10; i < 16; i += 1, j += 2) 930 snprintf(&buf[j], 3, "%02x", (uint8_t)a->data[i]); 931 return (&buf[0]); 932 } 933 #endif /* HYPERV_DEBUG */ 934 935 void 936 hv_guid_sprint(struct hv_guid *guid, char *str, size_t size) 937 { 938 const struct { 939 const struct hv_guid *guid; 940 const char *ident; 941 } map[] = { 942 { &hv_guid_network, "network" }, 943 { &hv_guid_ide, "ide" }, 944 { &hv_guid_scsi, "scsi" }, 945 { &hv_guid_shutdown, "shutdown" }, 946 { &hv_guid_timesync, "timesync" }, 947 { &hv_guid_heartbeat, "heartbeat" }, 948 { &hv_guid_kvp, "kvp" }, 949 #ifdef HYPERV_DEBUG 950 { &hv_guid_vss, "vss" }, 951 { &hv_guid_dynmem, "dynamic-memory" }, 952 { &hv_guid_mouse, "mouse" }, 953 { &hv_guid_kbd, "keyboard" }, 954 { &hv_guid_video, "video" }, 955 { &hv_guid_fc, "fiber-channel" }, 956 { &hv_guid_fcopy, "file-copy" }, 957 { &hv_guid_pcie, "pcie-passthrough" }, 958 { &hv_guid_netdir, "network-direct" }, 959 { &hv_guid_rdesktop, "remote-desktop" }, 960 { &hv_guid_avma1, "avma-1" }, 961 { &hv_guid_avma2, "avma-2" }, 962 { &hv_guid_avma3, "avma-3" }, 963 { &hv_guid_avma4, "avma-4" }, 964 #endif 965 }; 966 int i; 967 968 for (i = 0; i < nitems(map); i++) { 969 if (memcmp(guid, map[i].guid, sizeof(*guid)) == 0) { 970 strlcpy(str, map[i].ident, size); 971 return; 972 } 973 } 974 #ifdef HYPERV_DEBUG 975 strlcpy(str, guidprint(guid), size); 976 #endif 977 } 978 979 static int 980 hv_channel_scan_done(struct hv_softc *sc, struct hv_msg *msg __unused) 981 { 982 return (sc->sc_flags & HSF_OFFERS_DELIVERED); 983 } 984 985 int 986 hv_channel_scan(struct hv_softc *sc) 987 { 988 struct vmbus_chanmsg_hdr hdr; 989 struct vmbus_chanmsg_choffer rsp; 990 struct hv_offer *co; 991 992 SIMPLEQ_INIT(&sc->sc_offers); 993 mtx_init(&sc->sc_offerlck, IPL_NET); 994 995 memset(&hdr, 0, sizeof(hdr)); 996 hdr.chm_type = VMBUS_CHANMSG_CHREQUEST; 997 998 if (hv_cmd(sc, &hdr, sizeof(hdr), &rsp, sizeof(rsp), 999 HCF_NOSLEEP | HCF_NOREPLY)) { 1000 DPRINTF("%s: CHREQUEST failed\n", sc->sc_dev.dv_xname); 1001 return (-1); 1002 } 1003 1004 hv_wait(sc, hv_channel_scan_done, (struct hv_msg *)&hdr, 1005 &sc->sc_offers, "hvscan"); 1006 1007 TAILQ_INIT(&sc->sc_channels); 1008 mtx_init(&sc->sc_channelck, IPL_NET); 1009 1010 mtx_enter(&sc->sc_offerlck); 1011 while (!SIMPLEQ_EMPTY(&sc->sc_offers)) { 1012 co = SIMPLEQ_FIRST(&sc->sc_offers); 1013 SIMPLEQ_REMOVE_HEAD(&sc->sc_offers, co_entry); 1014 mtx_leave(&sc->sc_offerlck); 1015 1016 hv_process_offer(sc, co); 1017 free(co, M_DEVBUF, sizeof(*co)); 1018 1019 mtx_enter(&sc->sc_offerlck); 1020 } 1021 mtx_leave(&sc->sc_offerlck); 1022 1023 return (0); 1024 } 1025 1026 void 1027 hv_process_offer(struct hv_softc *sc, struct hv_offer *co) 1028 { 1029 struct hv_channel *ch, *nch; 1030 1031 nch = malloc(sizeof(*nch), M_DEVBUF, M_ZERO | M_NOWAIT); 1032 if (nch == NULL) { 1033 printf("%s: failed to allocate memory for the channel\n", 1034 sc->sc_dev.dv_xname); 1035 return; 1036 } 1037 nch->ch_sc = sc; 1038 hv_guid_sprint(&co->co_chan.chm_chtype, nch->ch_ident, 1039 sizeof(nch->ch_ident)); 1040 1041 /* 1042 * By default we setup state to enable batched reading. 1043 * A specific service can choose to disable this prior 1044 * to opening the channel. 1045 */ 1046 nch->ch_flags |= CHF_BATCHED; 1047 1048 KASSERT((((vaddr_t)&nch->ch_monprm) & 0x7) == 0); 1049 memset(&nch->ch_monprm, 0, sizeof(nch->ch_monprm)); 1050 nch->ch_monprm.mp_connid = VMBUS_CONNID_EVENT; 1051 1052 if (sc->sc_proto != VMBUS_VERSION_WS2008) 1053 nch->ch_monprm.mp_connid = co->co_chan.chm_connid; 1054 1055 if (co->co_chan.chm_flags1 & VMBUS_CHOFFER_FLAG1_HASMNF) { 1056 nch->ch_mgroup = co->co_chan.chm_montrig / VMBUS_MONTRIG_LEN; 1057 nch->ch_mindex = co->co_chan.chm_montrig % VMBUS_MONTRIG_LEN; 1058 nch->ch_flags |= CHF_MONITOR; 1059 } 1060 1061 nch->ch_id = co->co_chan.chm_chanid; 1062 1063 memcpy(&nch->ch_type, &co->co_chan.chm_chtype, sizeof(ch->ch_type)); 1064 memcpy(&nch->ch_inst, &co->co_chan.chm_chinst, sizeof(ch->ch_inst)); 1065 1066 mtx_enter(&sc->sc_channelck); 1067 TAILQ_FOREACH(ch, &sc->sc_channels, ch_entry) { 1068 if (!memcmp(&ch->ch_type, &nch->ch_type, sizeof(ch->ch_type)) && 1069 !memcmp(&ch->ch_inst, &nch->ch_inst, sizeof(ch->ch_inst))) 1070 break; 1071 } 1072 if (ch != NULL) { 1073 if (co->co_chan.chm_subidx == 0) { 1074 printf("%s: unknown offer \"%s\"\n", 1075 sc->sc_dev.dv_xname, nch->ch_ident); 1076 mtx_leave(&sc->sc_channelck); 1077 free(nch, M_DEVBUF, sizeof(*nch)); 1078 return; 1079 } 1080 #ifdef HYPERV_DEBUG 1081 printf("%s: subchannel %u for \"%s\"\n", sc->sc_dev.dv_xname, 1082 co->co_chan.chm_subidx, ch->ch_ident); 1083 #endif 1084 mtx_leave(&sc->sc_channelck); 1085 free(nch, M_DEVBUF, sizeof(*nch)); 1086 return; 1087 } 1088 1089 nch->ch_state = HV_CHANSTATE_OFFERED; 1090 1091 TAILQ_INSERT_TAIL(&sc->sc_channels, nch, ch_entry); 1092 mtx_leave(&sc->sc_channelck); 1093 1094 #ifdef HYPERV_DEBUG 1095 printf("%s: channel %u: \"%s\"", sc->sc_dev.dv_xname, nch->ch_id, 1096 nch->ch_ident); 1097 if (nch->ch_flags & CHF_MONITOR) 1098 printf(", monitor %u\n", co->co_chan.chm_montrig); 1099 else 1100 printf("\n"); 1101 #endif 1102 } 1103 1104 struct hv_channel * 1105 hv_channel_lookup(struct hv_softc *sc, uint32_t relid) 1106 { 1107 struct hv_channel *ch; 1108 1109 TAILQ_FOREACH(ch, &sc->sc_channels, ch_entry) { 1110 if (ch->ch_id == relid) 1111 return (ch); 1112 } 1113 return (NULL); 1114 } 1115 1116 int 1117 hv_channel_ring_create(struct hv_channel *ch, uint32_t buflen) 1118 { 1119 struct hv_softc *sc = ch->ch_sc; 1120 1121 buflen = roundup(buflen, PAGE_SIZE) + sizeof(struct vmbus_bufring); 1122 ch->ch_ring = km_alloc(2 * buflen, &kv_any, &kp_zero, cold ? 1123 &kd_nowait : &kd_waitok); 1124 if (ch->ch_ring == NULL) { 1125 printf("%s: failed to allocate channel ring\n", 1126 sc->sc_dev.dv_xname); 1127 return (-1); 1128 } 1129 ch->ch_ring_size = 2 * buflen; 1130 1131 memset(&ch->ch_wrd, 0, sizeof(ch->ch_wrd)); 1132 ch->ch_wrd.rd_ring = (struct vmbus_bufring *)ch->ch_ring; 1133 ch->ch_wrd.rd_size = buflen; 1134 ch->ch_wrd.rd_dsize = buflen - sizeof(struct vmbus_bufring); 1135 mtx_init(&ch->ch_wrd.rd_lock, IPL_NET); 1136 1137 memset(&ch->ch_rrd, 0, sizeof(ch->ch_rrd)); 1138 ch->ch_rrd.rd_ring = (struct vmbus_bufring *)((uint8_t *)ch->ch_ring + 1139 buflen); 1140 ch->ch_rrd.rd_size = buflen; 1141 ch->ch_rrd.rd_dsize = buflen - sizeof(struct vmbus_bufring); 1142 mtx_init(&ch->ch_rrd.rd_lock, IPL_NET); 1143 1144 if (hv_handle_alloc(ch, ch->ch_ring, 2 * buflen, &ch->ch_ring_gpadl)) { 1145 printf("%s: failed to obtain a PA handle for the ring\n", 1146 sc->sc_dev.dv_xname); 1147 hv_channel_ring_destroy(ch); 1148 return (-1); 1149 } 1150 1151 return (0); 1152 } 1153 1154 void 1155 hv_channel_ring_destroy(struct hv_channel *ch) 1156 { 1157 km_free(ch->ch_ring, ch->ch_ring_size, &kv_any, &kp_zero); 1158 ch->ch_ring = NULL; 1159 hv_handle_free(ch, ch->ch_ring_gpadl); 1160 1161 memset(&ch->ch_wrd, 0, sizeof(ch->ch_wrd)); 1162 memset(&ch->ch_rrd, 0, sizeof(ch->ch_rrd)); 1163 } 1164 1165 int 1166 hv_channel_open(struct hv_channel *ch, size_t buflen, void *udata, 1167 size_t udatalen, void (*handler)(void *), void *arg) 1168 { 1169 struct hv_softc *sc = ch->ch_sc; 1170 struct vmbus_chanmsg_chopen cmd; 1171 struct vmbus_chanmsg_chopen_resp rsp; 1172 int rv; 1173 1174 if (ch->ch_ring == NULL && 1175 hv_channel_ring_create(ch, buflen)) { 1176 DPRINTF("%s: failed to create channel ring\n", 1177 sc->sc_dev.dv_xname); 1178 return (-1); 1179 } 1180 1181 memset(&cmd, 0, sizeof(cmd)); 1182 cmd.chm_hdr.chm_type = VMBUS_CHANMSG_CHOPEN; 1183 cmd.chm_openid = ch->ch_id; 1184 cmd.chm_chanid = ch->ch_id; 1185 cmd.chm_gpadl = ch->ch_ring_gpadl; 1186 cmd.chm_txbr_pgcnt = ch->ch_wrd.rd_size >> PAGE_SHIFT; 1187 cmd.chm_vcpuid = ch->ch_vcpu; 1188 1189 if (udata && udatalen > 0) 1190 memcpy(cmd.chm_udata, udata, udatalen); 1191 1192 memset(&rsp, 0, sizeof(rsp)); 1193 1194 ch->ch_handler = handler; 1195 ch->ch_ctx = arg; 1196 1197 ch->ch_state = HV_CHANSTATE_OPENED; 1198 1199 rv = hv_cmd(sc, &cmd, sizeof(cmd), &rsp, sizeof(rsp), 1200 cold ? HCF_NOSLEEP : HCF_SLEEPOK); 1201 if (rv) { 1202 hv_channel_ring_destroy(ch); 1203 DPRINTF("%s: CHOPEN failed with %d\n", 1204 sc->sc_dev.dv_xname, rv); 1205 ch->ch_handler = NULL; 1206 ch->ch_ctx = NULL; 1207 ch->ch_state = HV_CHANSTATE_OFFERED; 1208 return (-1); 1209 } 1210 1211 return (0); 1212 } 1213 1214 int 1215 hv_channel_close(struct hv_channel *ch) 1216 { 1217 struct hv_softc *sc = ch->ch_sc; 1218 struct vmbus_chanmsg_chclose cmd; 1219 int rv; 1220 1221 memset(&cmd, 0, sizeof(cmd)); 1222 cmd.chm_hdr.chm_type = VMBUS_CHANMSG_CHCLOSE; 1223 cmd.chm_chanid = ch->ch_id; 1224 1225 ch->ch_state = HV_CHANSTATE_CLOSING; 1226 rv = hv_cmd(sc, &cmd, sizeof(cmd), NULL, 0, HCF_NOREPLY); 1227 if (rv) { 1228 DPRINTF("%s: CHCLOSE failed with %d\n", 1229 sc->sc_dev.dv_xname, rv); 1230 return (-1); 1231 } 1232 ch->ch_state = HV_CHANSTATE_CLOSED; 1233 hv_channel_ring_destroy(ch); 1234 return (0); 1235 } 1236 1237 static inline void 1238 hv_channel_setevent(struct hv_softc *sc, struct hv_channel *ch) 1239 { 1240 struct vmbus_mon_trig *mtg; 1241 1242 /* Each uint32_t represents 32 channels */ 1243 set_bit(ch->ch_id, sc->sc_wevents); 1244 if (ch->ch_flags & CHF_MONITOR) { 1245 mtg = &sc->sc_monitor[1]->mnf_trigs[ch->ch_mgroup]; 1246 set_bit(ch->ch_mindex, &mtg->mt_pending); 1247 } else 1248 hv_intr_signal(sc, &ch->ch_monprm); 1249 } 1250 1251 void 1252 hv_channel_intr(void *arg) 1253 { 1254 struct hv_channel *ch = arg; 1255 1256 if (hv_channel_ready(ch)) 1257 ch->ch_handler(ch->ch_ctx); 1258 1259 if (hv_channel_unpause(ch) == 0) 1260 return; 1261 1262 hv_channel_pause(ch); 1263 hv_channel_schedule(ch); 1264 } 1265 1266 int 1267 hv_channel_setdeferred(struct hv_channel *ch, const char *name) 1268 { 1269 ch->ch_taskq = taskq_create(name, 1, IPL_NET, TASKQ_MPSAFE); 1270 if (ch->ch_taskq == NULL) 1271 return (-1); 1272 task_set(&ch->ch_task, hv_channel_intr, ch); 1273 return (0); 1274 } 1275 1276 void 1277 hv_channel_schedule(struct hv_channel *ch) 1278 { 1279 if (ch->ch_handler) { 1280 if (!cold && (ch->ch_flags & CHF_BATCHED)) { 1281 hv_channel_pause(ch); 1282 task_add(ch->ch_taskq, &ch->ch_task); 1283 } else 1284 ch->ch_handler(ch->ch_ctx); 1285 } 1286 } 1287 1288 static inline void 1289 hv_ring_put(struct hv_ring_data *wrd, uint8_t *data, uint32_t datalen) 1290 { 1291 int left = MIN(datalen, wrd->rd_dsize - wrd->rd_prod); 1292 1293 memcpy(&wrd->rd_ring->br_data[wrd->rd_prod], data, left); 1294 memcpy(&wrd->rd_ring->br_data[0], data + left, datalen - left); 1295 wrd->rd_prod += datalen; 1296 if (wrd->rd_prod >= wrd->rd_dsize) 1297 wrd->rd_prod -= wrd->rd_dsize; 1298 } 1299 1300 static inline void 1301 hv_ring_get(struct hv_ring_data *rrd, uint8_t *data, uint32_t datalen, 1302 int peek) 1303 { 1304 int left = MIN(datalen, rrd->rd_dsize - rrd->rd_cons); 1305 1306 memcpy(data, &rrd->rd_ring->br_data[rrd->rd_cons], left); 1307 memcpy(data + left, &rrd->rd_ring->br_data[0], datalen - left); 1308 if (!peek) { 1309 rrd->rd_cons += datalen; 1310 if (rrd->rd_cons >= rrd->rd_dsize) 1311 rrd->rd_cons -= rrd->rd_dsize; 1312 } 1313 } 1314 1315 static inline void 1316 hv_ring_avail(struct hv_ring_data *rd, uint32_t *towrite, uint32_t *toread) 1317 { 1318 uint32_t ridx = rd->rd_ring->br_rindex; 1319 uint32_t widx = rd->rd_ring->br_windex; 1320 uint32_t r, w; 1321 1322 if (widx >= ridx) 1323 w = rd->rd_dsize - (widx - ridx); 1324 else 1325 w = ridx - widx; 1326 r = rd->rd_dsize - w; 1327 if (towrite) 1328 *towrite = w; 1329 if (toread) 1330 *toread = r; 1331 } 1332 1333 int 1334 hv_ring_write(struct hv_ring_data *wrd, struct iovec *iov, int iov_cnt, 1335 int *needsig) 1336 { 1337 uint64_t indices = 0; 1338 uint32_t avail, oprod, datalen = sizeof(indices); 1339 int i; 1340 1341 for (i = 0; i < iov_cnt; i++) 1342 datalen += iov[i].iov_len; 1343 1344 KASSERT(datalen <= wrd->rd_dsize); 1345 1346 hv_ring_avail(wrd, &avail, NULL); 1347 if (avail <= datalen) { 1348 DPRINTF("%s: avail %u datalen %u\n", __func__, avail, datalen); 1349 return (EAGAIN); 1350 } 1351 1352 oprod = wrd->rd_prod; 1353 1354 for (i = 0; i < iov_cnt; i++) 1355 hv_ring_put(wrd, iov[i].iov_base, iov[i].iov_len); 1356 1357 indices = (uint64_t)oprod << 32; 1358 hv_ring_put(wrd, (uint8_t *)&indices, sizeof(indices)); 1359 1360 virtio_membar_sync(); 1361 wrd->rd_ring->br_windex = wrd->rd_prod; 1362 virtio_membar_sync(); 1363 1364 /* Signal when the ring transitions from being empty to non-empty */ 1365 if (wrd->rd_ring->br_imask == 0 && 1366 wrd->rd_ring->br_rindex == oprod) 1367 *needsig = 1; 1368 else 1369 *needsig = 0; 1370 1371 return (0); 1372 } 1373 1374 int 1375 hv_channel_send(struct hv_channel *ch, void *data, uint32_t datalen, 1376 uint64_t rid, int type, uint32_t flags) 1377 { 1378 struct hv_softc *sc = ch->ch_sc; 1379 struct vmbus_chanpkt cp; 1380 struct iovec iov[3]; 1381 uint32_t pktlen, pktlen_aligned; 1382 uint64_t zeropad = 0; 1383 int rv, needsig = 0; 1384 1385 pktlen = sizeof(cp) + datalen; 1386 pktlen_aligned = roundup(pktlen, sizeof(uint64_t)); 1387 1388 cp.cp_hdr.cph_type = type; 1389 cp.cp_hdr.cph_flags = flags; 1390 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_hlen, sizeof(cp)); 1391 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_tlen, pktlen_aligned); 1392 cp.cp_hdr.cph_tid = rid; 1393 1394 iov[0].iov_base = &cp; 1395 iov[0].iov_len = sizeof(cp); 1396 1397 iov[1].iov_base = data; 1398 iov[1].iov_len = datalen; 1399 1400 iov[2].iov_base = &zeropad; 1401 iov[2].iov_len = pktlen_aligned - pktlen; 1402 1403 mtx_enter(&ch->ch_wrd.rd_lock); 1404 rv = hv_ring_write(&ch->ch_wrd, iov, 3, &needsig); 1405 mtx_leave(&ch->ch_wrd.rd_lock); 1406 if (rv == 0 && needsig) 1407 hv_channel_setevent(sc, ch); 1408 1409 return (rv); 1410 } 1411 1412 int 1413 hv_channel_send_sgl(struct hv_channel *ch, struct vmbus_gpa *sgl, 1414 uint32_t nsge, void *data, uint32_t datalen, uint64_t rid) 1415 { 1416 struct hv_softc *sc = ch->ch_sc; 1417 struct vmbus_chanpkt_sglist cp; 1418 struct iovec iov[4]; 1419 uint32_t buflen, pktlen, pktlen_aligned; 1420 uint64_t zeropad = 0; 1421 int rv, needsig = 0; 1422 1423 buflen = sizeof(struct vmbus_gpa) * nsge; 1424 pktlen = sizeof(cp) + datalen + buflen; 1425 pktlen_aligned = roundup(pktlen, sizeof(uint64_t)); 1426 1427 cp.cp_hdr.cph_type = VMBUS_CHANPKT_TYPE_GPA; 1428 cp.cp_hdr.cph_flags = VMBUS_CHANPKT_FLAG_RC; 1429 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_hlen, sizeof(cp) + buflen); 1430 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_tlen, pktlen_aligned); 1431 cp.cp_hdr.cph_tid = rid; 1432 cp.cp_gpa_cnt = nsge; 1433 cp.cp_rsvd = 0; 1434 1435 iov[0].iov_base = &cp; 1436 iov[0].iov_len = sizeof(cp); 1437 1438 iov[1].iov_base = sgl; 1439 iov[1].iov_len = buflen; 1440 1441 iov[2].iov_base = data; 1442 iov[2].iov_len = datalen; 1443 1444 iov[3].iov_base = &zeropad; 1445 iov[3].iov_len = pktlen_aligned - pktlen; 1446 1447 mtx_enter(&ch->ch_wrd.rd_lock); 1448 rv = hv_ring_write(&ch->ch_wrd, iov, 4, &needsig); 1449 mtx_leave(&ch->ch_wrd.rd_lock); 1450 if (rv == 0 && needsig) 1451 hv_channel_setevent(sc, ch); 1452 1453 return (rv); 1454 } 1455 1456 int 1457 hv_channel_send_prpl(struct hv_channel *ch, struct vmbus_gpa_range *prpl, 1458 uint32_t nprp, void *data, uint32_t datalen, uint64_t rid) 1459 { 1460 struct hv_softc *sc = ch->ch_sc; 1461 struct vmbus_chanpkt_prplist cp; 1462 struct iovec iov[4]; 1463 uint32_t buflen, pktlen, pktlen_aligned; 1464 uint64_t zeropad = 0; 1465 int rv, needsig = 0; 1466 1467 buflen = sizeof(struct vmbus_gpa_range) * (nprp + 1); 1468 pktlen = sizeof(cp) + datalen + buflen; 1469 pktlen_aligned = roundup(pktlen, sizeof(uint64_t)); 1470 1471 cp.cp_hdr.cph_type = VMBUS_CHANPKT_TYPE_GPA; 1472 cp.cp_hdr.cph_flags = VMBUS_CHANPKT_FLAG_RC; 1473 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_hlen, sizeof(cp) + buflen); 1474 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_tlen, pktlen_aligned); 1475 cp.cp_hdr.cph_tid = rid; 1476 cp.cp_range_cnt = 1; 1477 cp.cp_rsvd = 0; 1478 1479 iov[0].iov_base = &cp; 1480 iov[0].iov_len = sizeof(cp); 1481 1482 iov[1].iov_base = prpl; 1483 iov[1].iov_len = buflen; 1484 1485 iov[2].iov_base = data; 1486 iov[2].iov_len = datalen; 1487 1488 iov[3].iov_base = &zeropad; 1489 iov[3].iov_len = pktlen_aligned - pktlen; 1490 1491 mtx_enter(&ch->ch_wrd.rd_lock); 1492 rv = hv_ring_write(&ch->ch_wrd, iov, 4, &needsig); 1493 mtx_leave(&ch->ch_wrd.rd_lock); 1494 if (rv == 0 && needsig) 1495 hv_channel_setevent(sc, ch); 1496 1497 return (rv); 1498 } 1499 1500 int 1501 hv_ring_peek(struct hv_ring_data *rrd, void *data, uint32_t datalen) 1502 { 1503 uint32_t avail; 1504 1505 KASSERT(datalen <= rrd->rd_dsize); 1506 1507 hv_ring_avail(rrd, NULL, &avail); 1508 if (avail < datalen) 1509 return (EAGAIN); 1510 1511 hv_ring_get(rrd, (uint8_t *)data, datalen, 1); 1512 return (0); 1513 } 1514 1515 int 1516 hv_ring_read(struct hv_ring_data *rrd, void *data, uint32_t datalen, 1517 uint32_t offset) 1518 { 1519 uint64_t indices; 1520 uint32_t avail; 1521 1522 KASSERT(datalen <= rrd->rd_dsize); 1523 1524 hv_ring_avail(rrd, NULL, &avail); 1525 if (avail < datalen) { 1526 DPRINTF("%s: avail %u datalen %u\n", __func__, avail, datalen); 1527 return (EAGAIN); 1528 } 1529 1530 if (offset) { 1531 rrd->rd_cons += offset; 1532 if (rrd->rd_cons >= rrd->rd_dsize) 1533 rrd->rd_cons -= rrd->rd_dsize; 1534 } 1535 1536 hv_ring_get(rrd, (uint8_t *)data, datalen, 0); 1537 hv_ring_get(rrd, (uint8_t *)&indices, sizeof(indices), 0); 1538 1539 virtio_membar_sync(); 1540 rrd->rd_ring->br_rindex = rrd->rd_cons; 1541 1542 return (0); 1543 } 1544 1545 int 1546 hv_channel_recv(struct hv_channel *ch, void *data, uint32_t datalen, 1547 uint32_t *rlen, uint64_t *rid, int raw) 1548 { 1549 struct vmbus_chanpkt_hdr cph; 1550 uint32_t offset, pktlen; 1551 int rv; 1552 1553 *rlen = 0; 1554 1555 mtx_enter(&ch->ch_rrd.rd_lock); 1556 1557 if ((rv = hv_ring_peek(&ch->ch_rrd, &cph, sizeof(cph))) != 0) { 1558 mtx_leave(&ch->ch_rrd.rd_lock); 1559 return (rv); 1560 } 1561 1562 offset = raw ? 0 : VMBUS_CHANPKT_GETLEN(cph.cph_hlen); 1563 pktlen = VMBUS_CHANPKT_GETLEN(cph.cph_tlen) - offset; 1564 if (pktlen > datalen) { 1565 mtx_leave(&ch->ch_rrd.rd_lock); 1566 printf("%s: pktlen %u datalen %u\n", __func__, pktlen, datalen); 1567 return (EINVAL); 1568 } 1569 1570 rv = hv_ring_read(&ch->ch_rrd, data, pktlen, offset); 1571 if (rv == 0) { 1572 *rlen = pktlen; 1573 *rid = cph.cph_tid; 1574 } 1575 1576 mtx_leave(&ch->ch_rrd.rd_lock); 1577 1578 return (rv); 1579 } 1580 1581 static inline void 1582 hv_ring_mask(struct hv_ring_data *rd) 1583 { 1584 virtio_membar_sync(); 1585 rd->rd_ring->br_imask = 1; 1586 virtio_membar_sync(); 1587 } 1588 1589 static inline void 1590 hv_ring_unmask(struct hv_ring_data *rd) 1591 { 1592 virtio_membar_sync(); 1593 rd->rd_ring->br_imask = 0; 1594 virtio_membar_sync(); 1595 } 1596 1597 void 1598 hv_channel_pause(struct hv_channel *ch) 1599 { 1600 hv_ring_mask(&ch->ch_rrd); 1601 } 1602 1603 uint 1604 hv_channel_unpause(struct hv_channel *ch) 1605 { 1606 uint32_t avail; 1607 1608 hv_ring_unmask(&ch->ch_rrd); 1609 hv_ring_avail(&ch->ch_rrd, NULL, &avail); 1610 1611 return (avail); 1612 } 1613 1614 uint 1615 hv_channel_ready(struct hv_channel *ch) 1616 { 1617 uint32_t avail; 1618 1619 hv_ring_avail(&ch->ch_rrd, NULL, &avail); 1620 1621 return (avail); 1622 } 1623 1624 /* How many PFNs can be referenced by the header */ 1625 #define HV_NPFNHDR ((VMBUS_MSG_DSIZE_MAX - \ 1626 sizeof(struct vmbus_chanmsg_gpadl_conn)) / sizeof(uint64_t)) 1627 1628 /* How many PFNs can be referenced by the body */ 1629 #define HV_NPFNBODY ((VMBUS_MSG_DSIZE_MAX - \ 1630 sizeof(struct vmbus_chanmsg_gpadl_subconn)) / sizeof(uint64_t)) 1631 1632 int 1633 hv_handle_alloc(struct hv_channel *ch, void *buffer, uint32_t buflen, 1634 uint32_t *handle) 1635 { 1636 struct hv_softc *sc = ch->ch_sc; 1637 struct vmbus_chanmsg_gpadl_conn *hdr; 1638 struct vmbus_chanmsg_gpadl_subconn *cmd; 1639 struct vmbus_chanmsg_gpadl_connresp rsp; 1640 struct hv_msg *msg; 1641 int i, j, last, left, rv; 1642 int bodylen = 0, ncmds = 0, pfn = 0; 1643 int waitflag = cold ? M_NOWAIT : M_WAITOK; 1644 uint64_t *frames; 1645 paddr_t pa; 1646 caddr_t body; 1647 /* Total number of pages to reference */ 1648 int total = atop(buflen); 1649 /* Number of pages that will fit the header */ 1650 int inhdr = MIN(total, HV_NPFNHDR); 1651 1652 KASSERT((buflen & (PAGE_SIZE - 1)) == 0); 1653 1654 if ((msg = malloc(sizeof(*msg), M_DEVBUF, M_ZERO | waitflag)) == NULL) 1655 return (ENOMEM); 1656 1657 /* Prepare array of frame addresses */ 1658 if ((frames = mallocarray(total, sizeof(*frames), M_DEVBUF, M_ZERO | 1659 waitflag)) == NULL) { 1660 free(msg, M_DEVBUF, sizeof(*msg)); 1661 return (ENOMEM); 1662 } 1663 for (i = 0; i < total; i++) { 1664 if (!pmap_extract(pmap_kernel(), (vaddr_t)buffer + 1665 PAGE_SIZE * i, &pa)) { 1666 free(msg, M_DEVBUF, sizeof(*msg)); 1667 free(frames, M_DEVBUF, total * sizeof(*frames)); 1668 return (EFAULT); 1669 } 1670 frames[i] = atop(pa); 1671 } 1672 1673 msg->msg_req.hc_dsize = sizeof(struct vmbus_chanmsg_gpadl_conn) + 1674 inhdr * sizeof(uint64_t); 1675 hdr = (struct vmbus_chanmsg_gpadl_conn *)msg->msg_req.hc_data; 1676 msg->msg_rsp = &rsp; 1677 msg->msg_rsplen = sizeof(rsp); 1678 if (waitflag == M_NOWAIT) 1679 msg->msg_flags = MSGF_NOSLEEP; 1680 1681 left = total - inhdr; 1682 1683 /* Allocate additional gpadl_body structures if required */ 1684 if (left > 0) { 1685 ncmds = MAX(1, left / HV_NPFNBODY + left % HV_NPFNBODY); 1686 bodylen = ncmds * VMBUS_MSG_DSIZE_MAX; 1687 body = malloc(bodylen, M_DEVBUF, M_ZERO | waitflag); 1688 if (body == NULL) { 1689 free(msg, M_DEVBUF, sizeof(*msg)); 1690 free(frames, M_DEVBUF, atop(buflen) * sizeof(*frames)); 1691 return (ENOMEM); 1692 } 1693 } 1694 1695 *handle = atomic_inc_int_nv(&sc->sc_handle); 1696 1697 hdr->chm_hdr.chm_type = VMBUS_CHANMSG_GPADL_CONN; 1698 hdr->chm_chanid = ch->ch_id; 1699 hdr->chm_gpadl = *handle; 1700 1701 /* Single range for a contiguous buffer */ 1702 hdr->chm_range_cnt = 1; 1703 hdr->chm_range_len = sizeof(struct vmbus_gpa_range) + total * 1704 sizeof(uint64_t); 1705 hdr->chm_range.gpa_ofs = 0; 1706 hdr->chm_range.gpa_len = buflen; 1707 1708 /* Fit as many pages as possible into the header */ 1709 for (i = 0; i < inhdr; i++) 1710 hdr->chm_range.gpa_page[i] = frames[pfn++]; 1711 1712 for (i = 0; i < ncmds; i++) { 1713 cmd = (struct vmbus_chanmsg_gpadl_subconn *)(body + 1714 VMBUS_MSG_DSIZE_MAX * i); 1715 cmd->chm_hdr.chm_type = VMBUS_CHANMSG_GPADL_SUBCONN; 1716 cmd->chm_gpadl = *handle; 1717 last = MIN(left, HV_NPFNBODY); 1718 for (j = 0; j < last; j++) 1719 cmd->chm_gpa_page[j] = frames[pfn++]; 1720 left -= last; 1721 } 1722 1723 rv = hv_start(sc, msg); 1724 if (rv != 0) { 1725 DPRINTF("%s: GPADL_CONN failed\n", sc->sc_dev.dv_xname); 1726 goto out; 1727 } 1728 for (i = 0; i < ncmds; i++) { 1729 int cmdlen = sizeof(*cmd); 1730 cmd = (struct vmbus_chanmsg_gpadl_subconn *)(body + 1731 VMBUS_MSG_DSIZE_MAX * i); 1732 /* Last element can be short */ 1733 if (i == ncmds - 1) 1734 cmdlen += last * sizeof(uint64_t); 1735 else 1736 cmdlen += HV_NPFNBODY * sizeof(uint64_t); 1737 rv = hv_cmd(sc, cmd, cmdlen, NULL, 0, waitflag | HCF_NOREPLY); 1738 if (rv != 0) { 1739 DPRINTF("%s: GPADL_SUBCONN (iteration %d/%d) failed " 1740 "with %d\n", sc->sc_dev.dv_xname, i, ncmds, rv); 1741 goto out; 1742 } 1743 } 1744 rv = hv_reply(sc, msg); 1745 if (rv != 0) 1746 DPRINTF("%s: GPADL allocation failed with %d\n", 1747 sc->sc_dev.dv_xname, rv); 1748 1749 out: 1750 free(msg, M_DEVBUF, sizeof(*msg)); 1751 free(frames, M_DEVBUF, total * sizeof(*frames)); 1752 if (bodylen > 0) 1753 free(body, M_DEVBUF, bodylen); 1754 if (rv != 0) 1755 return (rv); 1756 1757 KASSERT(*handle == rsp.chm_gpadl); 1758 1759 return (0); 1760 } 1761 1762 void 1763 hv_handle_free(struct hv_channel *ch, uint32_t handle) 1764 { 1765 struct hv_softc *sc = ch->ch_sc; 1766 struct vmbus_chanmsg_gpadl_disconn cmd; 1767 struct vmbus_chanmsg_gpadl_disconn rsp; 1768 int rv; 1769 1770 memset(&cmd, 0, sizeof(cmd)); 1771 cmd.chm_hdr.chm_type = VMBUS_CHANMSG_GPADL_DISCONN; 1772 cmd.chm_chanid = ch->ch_id; 1773 cmd.chm_gpadl = handle; 1774 1775 rv = hv_cmd(sc, &cmd, sizeof(cmd), &rsp, sizeof(rsp), cold ? 1776 HCF_NOSLEEP : 0); 1777 if (rv) 1778 DPRINTF("%s: GPADL_DISCONN failed with %d\n", 1779 sc->sc_dev.dv_xname, rv); 1780 } 1781 1782 static int 1783 hv_attach_print(void *aux, const char *name) 1784 { 1785 struct hv_attach_args *aa = aux; 1786 1787 if (name) 1788 printf("\"%s\" at %s", aa->aa_ident, name); 1789 1790 return (UNCONF); 1791 } 1792 1793 int 1794 hv_attach_devices(struct hv_softc *sc) 1795 { 1796 struct hv_dev *dv; 1797 struct hv_channel *ch; 1798 1799 SLIST_INIT(&sc->sc_devs); 1800 mtx_init(&sc->sc_devlck, IPL_NET); 1801 1802 TAILQ_FOREACH(ch, &sc->sc_channels, ch_entry) { 1803 if (ch->ch_state != HV_CHANSTATE_OFFERED) 1804 continue; 1805 if (!(ch->ch_flags & CHF_MONITOR)) 1806 continue; 1807 dv = malloc(sizeof(*dv), M_DEVBUF, M_ZERO | M_NOWAIT); 1808 if (dv == NULL) { 1809 printf("%s: failed to allocate device object\n", 1810 sc->sc_dev.dv_xname); 1811 return (-1); 1812 } 1813 dv->dv_aa.aa_parent = sc; 1814 dv->dv_aa.aa_type = &ch->ch_type; 1815 dv->dv_aa.aa_inst = &ch->ch_inst; 1816 dv->dv_aa.aa_ident = ch->ch_ident; 1817 dv->dv_aa.aa_chan = ch; 1818 dv->dv_aa.aa_dmat = sc->sc_dmat; 1819 mtx_enter(&sc->sc_devlck); 1820 SLIST_INSERT_HEAD(&sc->sc_devs, dv, dv_entry); 1821 mtx_leave(&sc->sc_devlck); 1822 config_found((struct device *)sc, &dv->dv_aa, hv_attach_print); 1823 } 1824 return (0); 1825 } 1826 1827 void 1828 hv_evcount_attach(struct hv_channel *ch, const char *name) 1829 { 1830 struct hv_softc *sc = ch->ch_sc; 1831 1832 evcount_attach(&ch->ch_evcnt, name, &sc->sc_idtvec); 1833 } 1834