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_counter_mask = 0xffffffff, 146 .tc_frequency = 10000000, 147 .tc_name = "hyperv", 148 .tc_quality = 9001, 149 .tc_priv = NULL, 150 .tc_user = 0, 151 }; 152 153 struct cfdriver hyperv_cd = { 154 NULL, "hyperv", DV_DULL 155 }; 156 157 const struct cfattach hyperv_ca = { 158 sizeof(struct hv_softc), hv_match, hv_attach 159 }; 160 161 const struct hv_guid hv_guid_network = { 162 { 0x63, 0x51, 0x61, 0xf8, 0x3e, 0xdf, 0xc5, 0x46, 163 0x91, 0x3f, 0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e } 164 }; 165 166 const struct hv_guid hv_guid_ide = { 167 { 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, 168 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 } 169 }; 170 171 const struct hv_guid hv_guid_scsi = { 172 { 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, 173 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f } 174 }; 175 176 const struct hv_guid hv_guid_shutdown = { 177 { 0x31, 0x60, 0x0b, 0x0e, 0x13, 0x52, 0x34, 0x49, 178 0x81, 0x8b, 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb } 179 }; 180 181 const struct hv_guid hv_guid_timesync = { 182 { 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, 183 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf } 184 }; 185 186 const struct hv_guid hv_guid_heartbeat = { 187 { 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, 188 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d } 189 }; 190 191 const struct hv_guid hv_guid_kvp = { 192 { 0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d, 193 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x03, 0xe6 } 194 }; 195 196 #ifdef HYPERV_DEBUG 197 const struct hv_guid hv_guid_vss = { 198 { 0x29, 0x2e, 0xfa, 0x35, 0x23, 0xea, 0x36, 0x42, 199 0x96, 0xae, 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40 } 200 }; 201 202 const struct hv_guid hv_guid_dynmem = { 203 { 0xdc, 0x74, 0x50, 0x52, 0x85, 0x89, 0xe2, 0x46, 204 0x80, 0x57, 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02 } 205 }; 206 207 const struct hv_guid hv_guid_mouse = { 208 { 0x9e, 0xb6, 0xa8, 0xcf, 0x4a, 0x5b, 0xc0, 0x4c, 209 0xb9, 0x8b, 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a } 210 }; 211 212 const struct hv_guid hv_guid_kbd = { 213 { 0x6d, 0xad, 0x12, 0xf9, 0x17, 0x2b, 0xea, 0x48, 214 0xbd, 0x65, 0xf9, 0x27, 0xa6, 0x1c, 0x76, 0x84 } 215 }; 216 217 const struct hv_guid hv_guid_video = { 218 { 0x02, 0x78, 0x0a, 0xda, 0x77, 0xe3, 0xac, 0x4a, 219 0x8e, 0x77, 0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8 } 220 }; 221 222 const struct hv_guid hv_guid_fc = { 223 { 0x4a, 0xcc, 0x9b, 0x2f, 0x69, 0x00, 0xf3, 0x4a, 224 0xb7, 0x6b, 0x6f, 0xd0, 0xbe, 0x52, 0x8c, 0xda } 225 }; 226 227 const struct hv_guid hv_guid_fcopy = { 228 { 0xe3, 0x4b, 0xd1, 0x34, 0xe4, 0xde, 0xc8, 0x41, 229 0x9a, 0xe7, 0x6b, 0x17, 0x49, 0x77, 0xc1, 0x92 } 230 }; 231 232 const struct hv_guid hv_guid_pcie = { 233 { 0x1d, 0xf6, 0xc4, 0x44, 0x44, 0x44, 0x00, 0x44, 234 0x9d, 0x52, 0x80, 0x2e, 0x27, 0xed, 0xe1, 0x9f } 235 }; 236 237 const struct hv_guid hv_guid_netdir = { 238 { 0x3d, 0xaf, 0x2e, 0x8c, 0xa7, 0x32, 0x09, 0x4b, 239 0xab, 0x99, 0xbd, 0x1f, 0x1c, 0x86, 0xb5, 0x01 } 240 }; 241 242 const struct hv_guid hv_guid_rdesktop = { 243 { 0xf4, 0xac, 0x6a, 0x27, 0x15, 0xac, 0x6c, 0x42, 244 0x98, 0xdd, 0x75, 0x21, 0xad, 0x3f, 0x01, 0xfe } 245 }; 246 247 /* Automatic Virtual Machine Activation (AVMA) Services */ 248 const struct hv_guid hv_guid_avma1 = { 249 { 0x55, 0xb2, 0x87, 0x44, 0x8c, 0xb8, 0x3f, 0x40, 250 0xbb, 0x51, 0xd1, 0xf6, 0x9c, 0xf1, 0x7f, 0x87 } 251 }; 252 253 const struct hv_guid hv_guid_avma2 = { 254 { 0xf4, 0xba, 0x75, 0x33, 0x15, 0x9e, 0x30, 0x4b, 255 0xb7, 0x65, 0x67, 0xac, 0xb1, 0x0d, 0x60, 0x7b } 256 }; 257 258 const struct hv_guid hv_guid_avma3 = { 259 { 0xa0, 0x1f, 0x22, 0x99, 0xad, 0x24, 0xe2, 0x11, 260 0xbe, 0x98, 0x00, 0x1a, 0xa0, 0x1b, 0xbf, 0x6e } 261 }; 262 263 const struct hv_guid hv_guid_avma4 = { 264 { 0x16, 0x57, 0xe6, 0xf8, 0xb3, 0x3c, 0x06, 0x4a, 265 0x9a, 0x60, 0x18, 0x89, 0xc5, 0xcc, 0xca, 0xb5 } 266 }; 267 #endif /* HYPERV_DEBUG */ 268 269 int 270 hv_match(struct device *parent, void *match, void *aux) 271 { 272 struct pv_attach_args *pva = aux; 273 struct pvbus_hv *hv = &pva->pva_hv[PVBUS_HYPERV]; 274 275 if ((hv->hv_major == 0 && hv->hv_minor == 0) || hv->hv_base == 0) 276 return (0); 277 278 return (1); 279 } 280 281 void 282 hv_attach(struct device *parent, struct device *self, void *aux) 283 { 284 struct hv_softc *sc = (struct hv_softc *)self; 285 struct pv_attach_args *pva = aux; 286 struct pvbus_hv *hv = &pva->pva_hv[PVBUS_HYPERV]; 287 288 sc->sc_pvbus = hv; 289 sc->sc_dmat = pva->pva_dmat; 290 291 if (!(hv->hv_features & CPUID_HV_MSR_HYPERCALL) || 292 !(hv->hv_features & CPUID_HV_MSR_SYNIC)) { 293 printf(": not functional\n"); 294 return; 295 } 296 297 DPRINTF("\n"); 298 299 hv_set_version(sc); 300 301 if (hv->hv_features & CPUID_HV_MSR_TIME_REFCNT) 302 tc_init(&hv_timecounter); 303 304 if (hv_init_hypercall(sc)) 305 return; 306 307 /* Wire it up to the global */ 308 hv_sc = sc; 309 310 if (hv_init_interrupts(sc)) 311 return; 312 313 if (hv_vmbus_connect(sc)) 314 return; 315 316 DPRINTF("%s", sc->sc_dev.dv_xname); 317 printf(": protocol %d.%d, features %#x\n", 318 VMBUS_VERSION_MAJOR(sc->sc_proto), 319 VMBUS_VERSION_MINOR(sc->sc_proto), 320 hv->hv_features); 321 322 if (hv_channel_scan(sc)) 323 return; 324 325 /* Attach heartbeat, KVP and other "internal" services */ 326 hv_attach_icdevs(sc); 327 328 /* Attach devices with external drivers */ 329 hv_attach_devices(sc); 330 } 331 332 void 333 hv_set_version(struct hv_softc *sc) 334 { 335 uint64_t ver; 336 337 /* OpenBSD build date */ 338 ver = MSR_HV_GUESTID_OSTYPE_OPENBSD; 339 ver |= (uint64_t)OpenBSD << MSR_HV_GUESTID_VERSION_SHIFT; 340 wrmsr(MSR_HV_GUEST_OS_ID, ver); 341 } 342 343 u_int 344 hv_gettime(struct timecounter *tc) 345 { 346 u_int now = rdmsr(MSR_HV_TIME_REF_COUNT); 347 348 return (now); 349 } 350 351 void 352 hv_delay(int usecs) 353 { 354 uint64_t interval, start; 355 356 /* 10 MHz fixed frequency */ 357 interval = (uint64_t)usecs * 10; 358 start = rdmsr(MSR_HV_TIME_REF_COUNT); 359 while (rdmsr(MSR_HV_TIME_REF_COUNT) - start < interval) 360 CPU_BUSY_CYCLE(); 361 } 362 363 int 364 hv_init_hypercall(struct hv_softc *sc) 365 { 366 extern void *hv_hypercall_page; 367 uint64_t msr; 368 paddr_t pa; 369 370 sc->sc_hc = &hv_hypercall_page; 371 372 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_hc, &pa)) { 373 printf(": hypercall page PA extraction failed\n"); 374 return (-1); 375 } 376 377 msr = (atop(pa) << MSR_HV_HYPERCALL_PGSHIFT) | MSR_HV_HYPERCALL_ENABLE; 378 wrmsr(MSR_HV_HYPERCALL, msr); 379 380 if (!(rdmsr(MSR_HV_HYPERCALL) & MSR_HV_HYPERCALL_ENABLE)) { 381 printf(": failed to set up a hypercall page\n"); 382 return (-1); 383 } 384 385 return (0); 386 } 387 388 uint64_t 389 hv_hypercall(struct hv_softc *sc, uint64_t control, void *input, 390 void *output) 391 { 392 paddr_t input_pa = 0, output_pa = 0; 393 uint64_t status = 0; 394 395 if (input != NULL && 396 pmap_extract(pmap_kernel(), (vaddr_t)input, &input_pa) == 0) { 397 printf("%s: hypercall input PA extraction failed\n", 398 sc->sc_dev.dv_xname); 399 return (~HYPERCALL_STATUS_SUCCESS); 400 } 401 402 if (output != NULL && 403 pmap_extract(pmap_kernel(), (vaddr_t)output, &output_pa) == 0) { 404 printf("%s: hypercall output PA extraction failed\n", 405 sc->sc_dev.dv_xname); 406 return (~HYPERCALL_STATUS_SUCCESS); 407 } 408 409 #ifdef __amd64__ 410 extern uint64_t hv_hypercall_trampoline(uint64_t, paddr_t, paddr_t); 411 status = hv_hypercall_trampoline(control, input_pa, output_pa); 412 #else /* __i386__ */ 413 { 414 uint32_t control_hi = control >> 32; 415 uint32_t control_lo = control & 0xfffffffff; 416 uint32_t status_hi = 1; 417 uint32_t status_lo = 1; 418 419 __asm__ volatile ("call *%8" : 420 "=d" (status_hi), "=a"(status_lo) : 421 "d" (control_hi), "a" (control_lo), 422 "b" (0), "c" (input_pa), "D" (0), "S" (output_pa), 423 "m" (sc->sc_hc)); 424 425 status = status_lo | ((uint64_t)status_hi << 32); 426 } 427 #endif /* __amd64__ */ 428 429 return (status); 430 } 431 432 int 433 hv_init_interrupts(struct hv_softc *sc) 434 { 435 struct cpu_info *ci = curcpu(); 436 int cpu = CPU_INFO_UNIT(ci); 437 438 sc->sc_idtvec = LAPIC_HYPERV_VECTOR; 439 440 TAILQ_INIT(&sc->sc_reqs); 441 mtx_init(&sc->sc_reqlck, IPL_NET); 442 443 TAILQ_INIT(&sc->sc_rsps); 444 mtx_init(&sc->sc_rsplck, IPL_NET); 445 446 sc->sc_simp[cpu] = km_alloc(PAGE_SIZE, &kv_any, &kp_zero, &kd_nowait); 447 if (sc->sc_simp[cpu] == NULL) { 448 printf(": failed to allocate SIMP\n"); 449 return (-1); 450 } 451 452 sc->sc_siep[cpu] = km_alloc(PAGE_SIZE, &kv_any, &kp_zero, &kd_nowait); 453 if (sc->sc_siep[cpu] == NULL) { 454 printf(": failed to allocate SIEP\n"); 455 km_free(sc->sc_simp[cpu], PAGE_SIZE, &kv_any, &kp_zero); 456 return (-1); 457 } 458 459 sc->sc_proto = VMBUS_VERSION_WS2008; 460 461 return (hv_init_synic(sc)); 462 } 463 464 int 465 hv_init_synic(struct hv_softc *sc) 466 { 467 struct cpu_info *ci = curcpu(); 468 int cpu = CPU_INFO_UNIT(ci); 469 uint64_t simp, siefp, sctrl, sint; 470 paddr_t pa; 471 472 /* 473 * Setup the Synic's message page 474 */ 475 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_simp[cpu], &pa)) { 476 printf(": SIMP PA extraction failed\n"); 477 return (-1); 478 } 479 simp = rdmsr(MSR_HV_SIMP); 480 simp &= (1 << MSR_HV_SIMP_PGSHIFT) - 1; 481 simp |= (atop(pa) << MSR_HV_SIMP_PGSHIFT); 482 simp |= MSR_HV_SIMP_ENABLE; 483 wrmsr(MSR_HV_SIMP, simp); 484 485 /* 486 * Setup the Synic's event page 487 */ 488 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_siep[cpu], &pa)) { 489 printf(": SIEP PA extraction failed\n"); 490 return (-1); 491 } 492 siefp = rdmsr(MSR_HV_SIEFP); 493 siefp &= (1<<MSR_HV_SIEFP_PGSHIFT) - 1; 494 siefp |= (atop(pa) << MSR_HV_SIEFP_PGSHIFT); 495 siefp |= MSR_HV_SIEFP_ENABLE; 496 wrmsr(MSR_HV_SIEFP, siefp); 497 498 /* 499 * Configure and unmask SINT for message and event flags 500 */ 501 sint = rdmsr(MSR_HV_SINT0 + VMBUS_SINT_MESSAGE); 502 sint = sc->sc_idtvec | MSR_HV_SINT_AUTOEOI | 503 (sint & MSR_HV_SINT_RSVD_MASK); 504 wrmsr(MSR_HV_SINT0 + VMBUS_SINT_MESSAGE, sint); 505 506 /* Enable the global synic bit */ 507 sctrl = rdmsr(MSR_HV_SCONTROL); 508 sctrl |= MSR_HV_SCTRL_ENABLE; 509 wrmsr(MSR_HV_SCONTROL, sctrl); 510 511 sc->sc_vcpus[cpu] = rdmsr(MSR_HV_VP_INDEX); 512 513 DPRINTF("vcpu%u: SIMP %#llx SIEFP %#llx SCTRL %#llx\n", 514 sc->sc_vcpus[cpu], simp, siefp, sctrl); 515 516 return (0); 517 } 518 519 int 520 hv_cmd(struct hv_softc *sc, void *cmd, size_t cmdlen, void *rsp, 521 size_t rsplen, int flags) 522 { 523 struct hv_msg msg; 524 int rv; 525 526 if (cmdlen > VMBUS_MSG_DSIZE_MAX) { 527 printf("%s: payload too large (%lu)\n", sc->sc_dev.dv_xname, 528 cmdlen); 529 return (EMSGSIZE); 530 } 531 532 memset(&msg, 0, sizeof(msg)); 533 534 msg.msg_req.hc_dsize = cmdlen; 535 memcpy(msg.msg_req.hc_data, cmd, cmdlen); 536 537 if (!(flags & HCF_NOREPLY)) { 538 msg.msg_rsp = rsp; 539 msg.msg_rsplen = rsplen; 540 } else 541 msg.msg_flags |= MSGF_NOQUEUE; 542 543 if (flags & HCF_NOSLEEP) 544 msg.msg_flags |= MSGF_NOSLEEP; 545 546 if ((rv = hv_start(sc, &msg)) != 0) 547 return (rv); 548 return (hv_reply(sc, &msg)); 549 } 550 551 int 552 hv_start(struct hv_softc *sc, struct hv_msg *msg) 553 { 554 const int delays[] = { 100, 100, 100, 500, 500, 5000, 5000, 5000 }; 555 const char *wchan = "hvstart"; 556 uint16_t status; 557 int i, s; 558 559 msg->msg_req.hc_connid = VMBUS_CONNID_MESSAGE; 560 msg->msg_req.hc_msgtype = 1; 561 562 if (!(msg->msg_flags & MSGF_NOQUEUE)) { 563 mtx_enter(&sc->sc_reqlck); 564 TAILQ_INSERT_TAIL(&sc->sc_reqs, msg, msg_entry); 565 mtx_leave(&sc->sc_reqlck); 566 } 567 568 for (i = 0; i < nitems(delays); i++) { 569 status = hv_hypercall(sc, HYPERCALL_POST_MESSAGE, 570 &msg->msg_req, NULL); 571 if (status == HYPERCALL_STATUS_SUCCESS) 572 break; 573 if (msg->msg_flags & MSGF_NOSLEEP) { 574 delay(delays[i]); 575 s = splnet(); 576 hv_intr(); 577 splx(s); 578 } else { 579 tsleep_nsec(wchan, PRIBIO, wchan, 580 USEC_TO_NSEC(delays[i])); 581 } 582 } 583 if (status != 0) { 584 printf("%s: posting vmbus message failed with %d\n", 585 sc->sc_dev.dv_xname, status); 586 if (!(msg->msg_flags & MSGF_NOQUEUE)) { 587 mtx_enter(&sc->sc_reqlck); 588 TAILQ_REMOVE(&sc->sc_reqs, msg, msg_entry); 589 mtx_leave(&sc->sc_reqlck); 590 } 591 return (EIO); 592 } 593 594 return (0); 595 } 596 597 static int 598 hv_reply_done(struct hv_softc *sc, struct hv_msg *msg) 599 { 600 struct hv_msg *m; 601 602 mtx_enter(&sc->sc_rsplck); 603 TAILQ_FOREACH(m, &sc->sc_rsps, msg_entry) { 604 if (m == msg) { 605 mtx_leave(&sc->sc_rsplck); 606 return (1); 607 } 608 } 609 mtx_leave(&sc->sc_rsplck); 610 return (0); 611 } 612 613 int 614 hv_reply(struct hv_softc *sc, struct hv_msg *msg) 615 { 616 if (msg->msg_flags & MSGF_NOQUEUE) 617 return (0); 618 619 hv_wait(sc, hv_reply_done, msg, msg, "hvreply"); 620 621 mtx_enter(&sc->sc_rsplck); 622 TAILQ_REMOVE(&sc->sc_rsps, msg, msg_entry); 623 mtx_leave(&sc->sc_rsplck); 624 625 return (0); 626 } 627 628 void 629 hv_wait(struct hv_softc *sc, int (*cond)(struct hv_softc *, struct hv_msg *), 630 struct hv_msg *msg, void *wchan, const char *wmsg) 631 { 632 int s; 633 634 KASSERT(cold ? msg->msg_flags & MSGF_NOSLEEP : 1); 635 636 while (!cond(sc, msg)) { 637 if (msg->msg_flags & MSGF_NOSLEEP) { 638 delay(1000); 639 s = splnet(); 640 hv_intr(); 641 splx(s); 642 } else { 643 tsleep_nsec(wchan, PRIBIO, wmsg ? wmsg : "hvwait", 644 USEC_TO_NSEC(1000)); 645 } 646 } 647 } 648 649 uint16_t 650 hv_intr_signal(struct hv_softc *sc, void *con) 651 { 652 uint64_t status; 653 654 status = hv_hypercall(sc, HYPERCALL_SIGNAL_EVENT, con, NULL); 655 return ((uint16_t)status); 656 } 657 658 void 659 hv_intr(void) 660 { 661 struct hv_softc *sc = hv_sc; 662 663 hv_event_intr(sc); 664 hv_message_intr(sc); 665 } 666 667 void 668 hv_event_intr(struct hv_softc *sc) 669 { 670 struct vmbus_evtflags *evt; 671 struct cpu_info *ci = curcpu(); 672 int cpu = CPU_INFO_UNIT(ci); 673 int bit, row, maxrow, chanid; 674 struct hv_channel *ch; 675 u_long *revents, pending; 676 677 evt = (struct vmbus_evtflags *)sc->sc_siep[cpu] + 678 VMBUS_SINT_MESSAGE; 679 if ((sc->sc_proto == VMBUS_VERSION_WS2008) || 680 (sc->sc_proto == VMBUS_VERSION_WIN7)) { 681 if (!test_bit(0, &evt->evt_flags[0])) 682 return; 683 clear_bit(0, &evt->evt_flags[0]); 684 maxrow = VMBUS_CHAN_MAX_COMPAT / VMBUS_EVTFLAG_LEN; 685 /* 686 * receive size is 1/2 page and divide that by 4 bytes 687 */ 688 revents = sc->sc_revents; 689 } else { 690 maxrow = nitems(evt->evt_flags); 691 /* 692 * On Host with Win8 or above, the event page can be 693 * checked directly to get the id of the channel 694 * that has the pending interrupt. 695 */ 696 revents = &evt->evt_flags[0]; 697 } 698 699 for (row = 0; row < maxrow; row++) { 700 if (revents[row] == 0) 701 continue; 702 pending = atomic_swap_ulong(&revents[row], 0); 703 for (bit = 0; pending > 0; pending >>= 1, bit++) { 704 if ((pending & 1) == 0) 705 continue; 706 chanid = (row * LONG_BIT) + bit; 707 /* vmbus channel protocol message */ 708 if (chanid == 0) 709 continue; 710 ch = hv_channel_lookup(sc, chanid); 711 if (ch == NULL) { 712 printf("%s: unhandled event on %d\n", 713 sc->sc_dev.dv_xname, chanid); 714 continue; 715 } 716 if (ch->ch_state != HV_CHANSTATE_OPENED) { 717 printf("%s: channel %d is not active\n", 718 sc->sc_dev.dv_xname, chanid); 719 continue; 720 } 721 ch->ch_evcnt.ec_count++; 722 hv_channel_schedule(ch); 723 } 724 } 725 } 726 727 void 728 hv_message_intr(struct hv_softc *sc) 729 { 730 struct vmbus_message *msg; 731 struct vmbus_chanmsg_hdr *hdr; 732 struct cpu_info *ci = curcpu(); 733 int cpu = CPU_INFO_UNIT(ci); 734 735 for (;;) { 736 msg = (struct vmbus_message *)sc->sc_simp[cpu] + 737 VMBUS_SINT_MESSAGE; 738 if (msg->msg_type == VMBUS_MSGTYPE_NONE) 739 break; 740 741 hdr = (struct vmbus_chanmsg_hdr *)msg->msg_data; 742 if (hdr->chm_type >= VMBUS_CHANMSG_COUNT) { 743 printf("%s: unhandled message type %u flags %#x\n", 744 sc->sc_dev.dv_xname, hdr->chm_type, 745 msg->msg_flags); 746 goto skip; 747 } 748 if (hv_msg_dispatch[hdr->chm_type].hmd_handler) 749 hv_msg_dispatch[hdr->chm_type].hmd_handler(sc, hdr); 750 else 751 printf("%s: unhandled message type %u\n", 752 sc->sc_dev.dv_xname, hdr->chm_type); 753 skip: 754 msg->msg_type = VMBUS_MSGTYPE_NONE; 755 virtio_membar_sync(); 756 if (msg->msg_flags & VMBUS_MSGFLAG_PENDING) 757 wrmsr(MSR_HV_EOM, 0); 758 } 759 } 760 761 void 762 hv_channel_response(struct hv_softc *sc, struct vmbus_chanmsg_hdr *rsphdr) 763 { 764 struct hv_msg *msg; 765 struct vmbus_chanmsg_hdr *reqhdr; 766 int req; 767 768 req = hv_msg_dispatch[rsphdr->chm_type].hmd_request; 769 mtx_enter(&sc->sc_reqlck); 770 TAILQ_FOREACH(msg, &sc->sc_reqs, msg_entry) { 771 reqhdr = (struct vmbus_chanmsg_hdr *)&msg->msg_req.hc_data; 772 if (reqhdr->chm_type == req) { 773 TAILQ_REMOVE(&sc->sc_reqs, msg, msg_entry); 774 break; 775 } 776 } 777 mtx_leave(&sc->sc_reqlck); 778 if (msg != NULL) { 779 memcpy(msg->msg_rsp, rsphdr, msg->msg_rsplen); 780 mtx_enter(&sc->sc_rsplck); 781 TAILQ_INSERT_TAIL(&sc->sc_rsps, msg, msg_entry); 782 mtx_leave(&sc->sc_rsplck); 783 wakeup(msg); 784 } 785 } 786 787 void 788 hv_channel_offer(struct hv_softc *sc, struct vmbus_chanmsg_hdr *hdr) 789 { 790 struct hv_offer *co; 791 792 co = malloc(sizeof(*co), M_DEVBUF, M_NOWAIT | M_ZERO); 793 if (co == NULL) { 794 printf("%s: failed to allocate an offer object\n", 795 sc->sc_dev.dv_xname); 796 return; 797 } 798 799 memcpy(&co->co_chan, hdr, sizeof(co->co_chan)); 800 801 mtx_enter(&sc->sc_offerlck); 802 SIMPLEQ_INSERT_TAIL(&sc->sc_offers, co, co_entry); 803 mtx_leave(&sc->sc_offerlck); 804 } 805 806 void 807 hv_channel_rescind(struct hv_softc *sc, struct vmbus_chanmsg_hdr *hdr) 808 { 809 const struct vmbus_chanmsg_chrescind *cmd; 810 811 cmd = (const struct vmbus_chanmsg_chrescind *)hdr; 812 printf("%s: revoking channel %u\n", sc->sc_dev.dv_xname, 813 cmd->chm_chanid); 814 } 815 816 void 817 hv_channel_delivered(struct hv_softc *sc, struct vmbus_chanmsg_hdr *hdr) 818 { 819 atomic_setbits_int(&sc->sc_flags, HSF_OFFERS_DELIVERED); 820 wakeup(&sc->sc_offers); 821 } 822 823 int 824 hv_vmbus_connect(struct hv_softc *sc) 825 { 826 const uint32_t versions[] = { 827 VMBUS_VERSION_WIN10, 828 VMBUS_VERSION_WIN8_1, VMBUS_VERSION_WIN8, 829 VMBUS_VERSION_WIN7, VMBUS_VERSION_WS2008 830 }; 831 struct vmbus_chanmsg_connect cmd; 832 struct vmbus_chanmsg_connect_resp rsp; 833 paddr_t epa, mpa1, mpa2; 834 int i; 835 836 sc->sc_events = km_alloc(PAGE_SIZE, &kv_any, &kp_zero, &kd_nowait); 837 if (sc->sc_events == NULL) { 838 printf(": failed to allocate channel port events page\n"); 839 goto errout; 840 } 841 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_events, &epa)) { 842 printf(": channel port events page PA extraction failed\n"); 843 goto errout; 844 } 845 846 sc->sc_wevents = (u_long *)sc->sc_events; 847 sc->sc_revents = (u_long *)((caddr_t)sc->sc_events + (PAGE_SIZE >> 1)); 848 849 sc->sc_monitor[0] = km_alloc(PAGE_SIZE, &kv_any, &kp_zero, &kd_nowait); 850 if (sc->sc_monitor[0] == NULL) { 851 printf(": failed to allocate monitor page 1\n"); 852 goto errout; 853 } 854 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_monitor[0], &mpa1)) { 855 printf(": monitor page 1 PA extraction failed\n"); 856 goto errout; 857 } 858 859 sc->sc_monitor[1] = km_alloc(PAGE_SIZE, &kv_any, &kp_zero, &kd_nowait); 860 if (sc->sc_monitor[1] == NULL) { 861 printf(": failed to allocate monitor page 2\n"); 862 goto errout; 863 } 864 if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_monitor[1], &mpa2)) { 865 printf(": monitor page 2 PA extraction failed\n"); 866 goto errout; 867 } 868 869 memset(&cmd, 0, sizeof(cmd)); 870 cmd.chm_hdr.chm_type = VMBUS_CHANMSG_CONNECT; 871 cmd.chm_evtflags = (uint64_t)epa; 872 cmd.chm_mnf1 = (uint64_t)mpa1; 873 cmd.chm_mnf2 = (uint64_t)mpa2; 874 875 memset(&rsp, 0, sizeof(rsp)); 876 877 for (i = 0; i < nitems(versions); i++) { 878 cmd.chm_ver = versions[i]; 879 if (hv_cmd(sc, &cmd, sizeof(cmd), &rsp, sizeof(rsp), 880 HCF_NOSLEEP)) { 881 DPRINTF("%s: CONNECT failed\n", 882 sc->sc_dev.dv_xname); 883 goto errout; 884 } 885 if (rsp.chm_done) { 886 sc->sc_flags |= HSF_CONNECTED; 887 sc->sc_proto = versions[i]; 888 sc->sc_handle = VMBUS_GPADL_START; 889 break; 890 } 891 } 892 if (i == nitems(versions)) { 893 printf("%s: failed to negotiate protocol version\n", 894 sc->sc_dev.dv_xname); 895 goto errout; 896 } 897 898 return (0); 899 900 errout: 901 if (sc->sc_events) { 902 km_free(sc->sc_events, PAGE_SIZE, &kv_any, &kp_zero); 903 sc->sc_events = NULL; 904 sc->sc_wevents = NULL; 905 sc->sc_revents = NULL; 906 } 907 if (sc->sc_monitor[0]) { 908 km_free(sc->sc_monitor[0], PAGE_SIZE, &kv_any, &kp_zero); 909 sc->sc_monitor[0] = NULL; 910 } 911 if (sc->sc_monitor[1]) { 912 km_free(sc->sc_monitor[1], PAGE_SIZE, &kv_any, &kp_zero); 913 sc->sc_monitor[1] = NULL; 914 } 915 return (-1); 916 } 917 918 #ifdef HYPERV_DEBUG 919 static inline char * 920 guidprint(struct hv_guid *a) 921 { 922 /* 3 0 5 4 7 6 8 9 10 15 */ 923 /* 33221100-5544-7766-9988-FFEEDDCCBBAA */ 924 static char buf[16 * 2 + 4 + 1]; 925 int i, j = 0; 926 927 for (i = 3; i != -1; i -= 1, j += 2) 928 snprintf(&buf[j], 3, "%02x", (uint8_t)a->data[i]); 929 buf[j++] = '-'; 930 for (i = 5; i != 3; i -= 1, j += 2) 931 snprintf(&buf[j], 3, "%02x", (uint8_t)a->data[i]); 932 buf[j++] = '-'; 933 for (i = 7; i != 5; i -= 1, j += 2) 934 snprintf(&buf[j], 3, "%02x", (uint8_t)a->data[i]); 935 buf[j++] = '-'; 936 for (i = 8; i < 10; i += 1, j += 2) 937 snprintf(&buf[j], 3, "%02x", (uint8_t)a->data[i]); 938 buf[j++] = '-'; 939 for (i = 10; i < 16; i += 1, j += 2) 940 snprintf(&buf[j], 3, "%02x", (uint8_t)a->data[i]); 941 return (&buf[0]); 942 } 943 #endif /* HYPERV_DEBUG */ 944 945 void 946 hv_guid_sprint(struct hv_guid *guid, char *str, size_t size) 947 { 948 const struct { 949 const struct hv_guid *guid; 950 const char *ident; 951 } map[] = { 952 { &hv_guid_network, "network" }, 953 { &hv_guid_ide, "ide" }, 954 { &hv_guid_scsi, "scsi" }, 955 { &hv_guid_shutdown, "shutdown" }, 956 { &hv_guid_timesync, "timesync" }, 957 { &hv_guid_heartbeat, "heartbeat" }, 958 { &hv_guid_kvp, "kvp" }, 959 #ifdef HYPERV_DEBUG 960 { &hv_guid_vss, "vss" }, 961 { &hv_guid_dynmem, "dynamic-memory" }, 962 { &hv_guid_mouse, "mouse" }, 963 { &hv_guid_kbd, "keyboard" }, 964 { &hv_guid_video, "video" }, 965 { &hv_guid_fc, "fiber-channel" }, 966 { &hv_guid_fcopy, "file-copy" }, 967 { &hv_guid_pcie, "pcie-passthrough" }, 968 { &hv_guid_netdir, "network-direct" }, 969 { &hv_guid_rdesktop, "remote-desktop" }, 970 { &hv_guid_avma1, "avma-1" }, 971 { &hv_guid_avma2, "avma-2" }, 972 { &hv_guid_avma3, "avma-3" }, 973 { &hv_guid_avma4, "avma-4" }, 974 #endif 975 }; 976 int i; 977 978 for (i = 0; i < nitems(map); i++) { 979 if (memcmp(guid, map[i].guid, sizeof(*guid)) == 0) { 980 strlcpy(str, map[i].ident, size); 981 return; 982 } 983 } 984 #ifdef HYPERV_DEBUG 985 strlcpy(str, guidprint(guid), size); 986 #endif 987 } 988 989 static int 990 hv_channel_scan_done(struct hv_softc *sc, struct hv_msg *msg __unused) 991 { 992 return (sc->sc_flags & HSF_OFFERS_DELIVERED); 993 } 994 995 int 996 hv_channel_scan(struct hv_softc *sc) 997 { 998 struct vmbus_chanmsg_hdr hdr; 999 struct vmbus_chanmsg_choffer rsp; 1000 struct hv_offer *co; 1001 1002 SIMPLEQ_INIT(&sc->sc_offers); 1003 mtx_init(&sc->sc_offerlck, IPL_NET); 1004 1005 memset(&hdr, 0, sizeof(hdr)); 1006 hdr.chm_type = VMBUS_CHANMSG_CHREQUEST; 1007 1008 if (hv_cmd(sc, &hdr, sizeof(hdr), &rsp, sizeof(rsp), 1009 HCF_NOSLEEP | HCF_NOREPLY)) { 1010 DPRINTF("%s: CHREQUEST failed\n", sc->sc_dev.dv_xname); 1011 return (-1); 1012 } 1013 1014 hv_wait(sc, hv_channel_scan_done, (struct hv_msg *)&hdr, 1015 &sc->sc_offers, "hvscan"); 1016 1017 TAILQ_INIT(&sc->sc_channels); 1018 mtx_init(&sc->sc_channelck, IPL_NET); 1019 1020 mtx_enter(&sc->sc_offerlck); 1021 while (!SIMPLEQ_EMPTY(&sc->sc_offers)) { 1022 co = SIMPLEQ_FIRST(&sc->sc_offers); 1023 SIMPLEQ_REMOVE_HEAD(&sc->sc_offers, co_entry); 1024 mtx_leave(&sc->sc_offerlck); 1025 1026 hv_process_offer(sc, co); 1027 free(co, M_DEVBUF, sizeof(*co)); 1028 1029 mtx_enter(&sc->sc_offerlck); 1030 } 1031 mtx_leave(&sc->sc_offerlck); 1032 1033 return (0); 1034 } 1035 1036 void 1037 hv_process_offer(struct hv_softc *sc, struct hv_offer *co) 1038 { 1039 struct hv_channel *ch, *nch; 1040 1041 nch = malloc(sizeof(*nch), M_DEVBUF, M_ZERO | M_NOWAIT); 1042 if (nch == NULL) { 1043 printf("%s: failed to allocate memory for the channel\n", 1044 sc->sc_dev.dv_xname); 1045 return; 1046 } 1047 nch->ch_sc = sc; 1048 hv_guid_sprint(&co->co_chan.chm_chtype, nch->ch_ident, 1049 sizeof(nch->ch_ident)); 1050 1051 /* 1052 * By default we setup state to enable batched reading. 1053 * A specific service can choose to disable this prior 1054 * to opening the channel. 1055 */ 1056 nch->ch_flags |= CHF_BATCHED; 1057 1058 KASSERT((((vaddr_t)&nch->ch_monprm) & 0x7) == 0); 1059 memset(&nch->ch_monprm, 0, sizeof(nch->ch_monprm)); 1060 nch->ch_monprm.mp_connid = VMBUS_CONNID_EVENT; 1061 1062 if (sc->sc_proto != VMBUS_VERSION_WS2008) 1063 nch->ch_monprm.mp_connid = co->co_chan.chm_connid; 1064 1065 if (co->co_chan.chm_flags1 & VMBUS_CHOFFER_FLAG1_HASMNF) { 1066 nch->ch_mgroup = co->co_chan.chm_montrig / VMBUS_MONTRIG_LEN; 1067 nch->ch_mindex = co->co_chan.chm_montrig % VMBUS_MONTRIG_LEN; 1068 nch->ch_flags |= CHF_MONITOR; 1069 } 1070 1071 nch->ch_id = co->co_chan.chm_chanid; 1072 1073 memcpy(&nch->ch_type, &co->co_chan.chm_chtype, sizeof(ch->ch_type)); 1074 memcpy(&nch->ch_inst, &co->co_chan.chm_chinst, sizeof(ch->ch_inst)); 1075 1076 mtx_enter(&sc->sc_channelck); 1077 TAILQ_FOREACH(ch, &sc->sc_channels, ch_entry) { 1078 if (!memcmp(&ch->ch_type, &nch->ch_type, sizeof(ch->ch_type)) && 1079 !memcmp(&ch->ch_inst, &nch->ch_inst, sizeof(ch->ch_inst))) 1080 break; 1081 } 1082 if (ch != NULL) { 1083 if (co->co_chan.chm_subidx == 0) { 1084 printf("%s: unknown offer \"%s\"\n", 1085 sc->sc_dev.dv_xname, nch->ch_ident); 1086 mtx_leave(&sc->sc_channelck); 1087 free(nch, M_DEVBUF, sizeof(*nch)); 1088 return; 1089 } 1090 #ifdef HYPERV_DEBUG 1091 printf("%s: subchannel %u for \"%s\"\n", sc->sc_dev.dv_xname, 1092 co->co_chan.chm_subidx, ch->ch_ident); 1093 #endif 1094 mtx_leave(&sc->sc_channelck); 1095 free(nch, M_DEVBUF, sizeof(*nch)); 1096 return; 1097 } 1098 1099 nch->ch_state = HV_CHANSTATE_OFFERED; 1100 1101 TAILQ_INSERT_TAIL(&sc->sc_channels, nch, ch_entry); 1102 mtx_leave(&sc->sc_channelck); 1103 1104 #ifdef HYPERV_DEBUG 1105 printf("%s: channel %u: \"%s\"", sc->sc_dev.dv_xname, nch->ch_id, 1106 nch->ch_ident); 1107 if (nch->ch_flags & CHF_MONITOR) 1108 printf(", monitor %u\n", co->co_chan.chm_montrig); 1109 else 1110 printf("\n"); 1111 #endif 1112 } 1113 1114 struct hv_channel * 1115 hv_channel_lookup(struct hv_softc *sc, uint32_t relid) 1116 { 1117 struct hv_channel *ch; 1118 1119 TAILQ_FOREACH(ch, &sc->sc_channels, ch_entry) { 1120 if (ch->ch_id == relid) 1121 return (ch); 1122 } 1123 return (NULL); 1124 } 1125 1126 int 1127 hv_channel_ring_create(struct hv_channel *ch, uint32_t buflen) 1128 { 1129 struct hv_softc *sc = ch->ch_sc; 1130 1131 buflen = roundup(buflen, PAGE_SIZE) + sizeof(struct vmbus_bufring); 1132 ch->ch_ring = km_alloc(2 * buflen, &kv_any, &kp_zero, cold ? 1133 &kd_nowait : &kd_waitok); 1134 if (ch->ch_ring == NULL) { 1135 printf("%s: failed to allocate channel ring\n", 1136 sc->sc_dev.dv_xname); 1137 return (-1); 1138 } 1139 ch->ch_ring_size = 2 * buflen; 1140 1141 memset(&ch->ch_wrd, 0, sizeof(ch->ch_wrd)); 1142 ch->ch_wrd.rd_ring = (struct vmbus_bufring *)ch->ch_ring; 1143 ch->ch_wrd.rd_size = buflen; 1144 ch->ch_wrd.rd_dsize = buflen - sizeof(struct vmbus_bufring); 1145 mtx_init(&ch->ch_wrd.rd_lock, IPL_NET); 1146 1147 memset(&ch->ch_rrd, 0, sizeof(ch->ch_rrd)); 1148 ch->ch_rrd.rd_ring = (struct vmbus_bufring *)((uint8_t *)ch->ch_ring + 1149 buflen); 1150 ch->ch_rrd.rd_size = buflen; 1151 ch->ch_rrd.rd_dsize = buflen - sizeof(struct vmbus_bufring); 1152 mtx_init(&ch->ch_rrd.rd_lock, IPL_NET); 1153 1154 if (hv_handle_alloc(ch, ch->ch_ring, 2 * buflen, &ch->ch_ring_gpadl)) { 1155 printf("%s: failed to obtain a PA handle for the ring\n", 1156 sc->sc_dev.dv_xname); 1157 hv_channel_ring_destroy(ch); 1158 return (-1); 1159 } 1160 1161 return (0); 1162 } 1163 1164 void 1165 hv_channel_ring_destroy(struct hv_channel *ch) 1166 { 1167 km_free(ch->ch_ring, ch->ch_ring_size, &kv_any, &kp_zero); 1168 ch->ch_ring = NULL; 1169 hv_handle_free(ch, ch->ch_ring_gpadl); 1170 1171 memset(&ch->ch_wrd, 0, sizeof(ch->ch_wrd)); 1172 memset(&ch->ch_rrd, 0, sizeof(ch->ch_rrd)); 1173 } 1174 1175 int 1176 hv_channel_open(struct hv_channel *ch, size_t buflen, void *udata, 1177 size_t udatalen, void (*handler)(void *), void *arg) 1178 { 1179 struct hv_softc *sc = ch->ch_sc; 1180 struct vmbus_chanmsg_chopen cmd; 1181 struct vmbus_chanmsg_chopen_resp rsp; 1182 int rv; 1183 1184 if (ch->ch_ring == NULL && 1185 hv_channel_ring_create(ch, buflen)) { 1186 DPRINTF("%s: failed to create channel ring\n", 1187 sc->sc_dev.dv_xname); 1188 return (-1); 1189 } 1190 1191 memset(&cmd, 0, sizeof(cmd)); 1192 cmd.chm_hdr.chm_type = VMBUS_CHANMSG_CHOPEN; 1193 cmd.chm_openid = ch->ch_id; 1194 cmd.chm_chanid = ch->ch_id; 1195 cmd.chm_gpadl = ch->ch_ring_gpadl; 1196 cmd.chm_txbr_pgcnt = ch->ch_wrd.rd_size >> PAGE_SHIFT; 1197 cmd.chm_vcpuid = ch->ch_vcpu; 1198 1199 if (udata && udatalen > 0) 1200 memcpy(cmd.chm_udata, udata, udatalen); 1201 1202 memset(&rsp, 0, sizeof(rsp)); 1203 1204 ch->ch_handler = handler; 1205 ch->ch_ctx = arg; 1206 1207 ch->ch_state = HV_CHANSTATE_OPENED; 1208 1209 rv = hv_cmd(sc, &cmd, sizeof(cmd), &rsp, sizeof(rsp), 1210 cold ? HCF_NOSLEEP : HCF_SLEEPOK); 1211 if (rv) { 1212 hv_channel_ring_destroy(ch); 1213 DPRINTF("%s: CHOPEN failed with %d\n", 1214 sc->sc_dev.dv_xname, rv); 1215 ch->ch_handler = NULL; 1216 ch->ch_ctx = NULL; 1217 ch->ch_state = HV_CHANSTATE_OFFERED; 1218 return (-1); 1219 } 1220 1221 return (0); 1222 } 1223 1224 int 1225 hv_channel_close(struct hv_channel *ch) 1226 { 1227 struct hv_softc *sc = ch->ch_sc; 1228 struct vmbus_chanmsg_chclose cmd; 1229 int rv; 1230 1231 memset(&cmd, 0, sizeof(cmd)); 1232 cmd.chm_hdr.chm_type = VMBUS_CHANMSG_CHCLOSE; 1233 cmd.chm_chanid = ch->ch_id; 1234 1235 ch->ch_state = HV_CHANSTATE_CLOSING; 1236 rv = hv_cmd(sc, &cmd, sizeof(cmd), NULL, 0, HCF_NOREPLY); 1237 if (rv) { 1238 DPRINTF("%s: CHCLOSE failed with %d\n", 1239 sc->sc_dev.dv_xname, rv); 1240 return (-1); 1241 } 1242 ch->ch_state = HV_CHANSTATE_CLOSED; 1243 hv_channel_ring_destroy(ch); 1244 return (0); 1245 } 1246 1247 static inline void 1248 hv_channel_setevent(struct hv_softc *sc, struct hv_channel *ch) 1249 { 1250 struct vmbus_mon_trig *mtg; 1251 1252 /* Each uint32_t represents 32 channels */ 1253 set_bit(ch->ch_id, sc->sc_wevents); 1254 if (ch->ch_flags & CHF_MONITOR) { 1255 mtg = &sc->sc_monitor[1]->mnf_trigs[ch->ch_mgroup]; 1256 set_bit(ch->ch_mindex, &mtg->mt_pending); 1257 } else 1258 hv_intr_signal(sc, &ch->ch_monprm); 1259 } 1260 1261 void 1262 hv_channel_intr(void *arg) 1263 { 1264 struct hv_channel *ch = arg; 1265 1266 if (hv_channel_ready(ch)) 1267 ch->ch_handler(ch->ch_ctx); 1268 1269 if (hv_channel_unpause(ch) == 0) 1270 return; 1271 1272 hv_channel_pause(ch); 1273 hv_channel_schedule(ch); 1274 } 1275 1276 int 1277 hv_channel_setdeferred(struct hv_channel *ch, const char *name) 1278 { 1279 ch->ch_taskq = taskq_create(name, 1, IPL_NET, TASKQ_MPSAFE); 1280 if (ch->ch_taskq == NULL) 1281 return (-1); 1282 task_set(&ch->ch_task, hv_channel_intr, ch); 1283 return (0); 1284 } 1285 1286 void 1287 hv_channel_schedule(struct hv_channel *ch) 1288 { 1289 if (ch->ch_handler) { 1290 if (!cold && (ch->ch_flags & CHF_BATCHED)) { 1291 hv_channel_pause(ch); 1292 task_add(ch->ch_taskq, &ch->ch_task); 1293 } else 1294 ch->ch_handler(ch->ch_ctx); 1295 } 1296 } 1297 1298 static inline void 1299 hv_ring_put(struct hv_ring_data *wrd, uint8_t *data, uint32_t datalen) 1300 { 1301 int left = MIN(datalen, wrd->rd_dsize - wrd->rd_prod); 1302 1303 memcpy(&wrd->rd_ring->br_data[wrd->rd_prod], data, left); 1304 memcpy(&wrd->rd_ring->br_data[0], data + left, datalen - left); 1305 wrd->rd_prod += datalen; 1306 if (wrd->rd_prod >= wrd->rd_dsize) 1307 wrd->rd_prod -= wrd->rd_dsize; 1308 } 1309 1310 static inline void 1311 hv_ring_get(struct hv_ring_data *rrd, uint8_t *data, uint32_t datalen, 1312 int peek) 1313 { 1314 int left = MIN(datalen, rrd->rd_dsize - rrd->rd_cons); 1315 1316 memcpy(data, &rrd->rd_ring->br_data[rrd->rd_cons], left); 1317 memcpy(data + left, &rrd->rd_ring->br_data[0], datalen - left); 1318 if (!peek) { 1319 rrd->rd_cons += datalen; 1320 if (rrd->rd_cons >= rrd->rd_dsize) 1321 rrd->rd_cons -= rrd->rd_dsize; 1322 } 1323 } 1324 1325 static inline void 1326 hv_ring_avail(struct hv_ring_data *rd, uint32_t *towrite, uint32_t *toread) 1327 { 1328 uint32_t ridx = rd->rd_ring->br_rindex; 1329 uint32_t widx = rd->rd_ring->br_windex; 1330 uint32_t r, w; 1331 1332 if (widx >= ridx) 1333 w = rd->rd_dsize - (widx - ridx); 1334 else 1335 w = ridx - widx; 1336 r = rd->rd_dsize - w; 1337 if (towrite) 1338 *towrite = w; 1339 if (toread) 1340 *toread = r; 1341 } 1342 1343 int 1344 hv_ring_write(struct hv_ring_data *wrd, struct iovec *iov, int iov_cnt, 1345 int *needsig) 1346 { 1347 uint64_t indices = 0; 1348 uint32_t avail, oprod, datalen = sizeof(indices); 1349 int i; 1350 1351 for (i = 0; i < iov_cnt; i++) 1352 datalen += iov[i].iov_len; 1353 1354 KASSERT(datalen <= wrd->rd_dsize); 1355 1356 hv_ring_avail(wrd, &avail, NULL); 1357 if (avail <= datalen) { 1358 DPRINTF("%s: avail %u datalen %u\n", __func__, avail, datalen); 1359 return (EAGAIN); 1360 } 1361 1362 oprod = wrd->rd_prod; 1363 1364 for (i = 0; i < iov_cnt; i++) 1365 hv_ring_put(wrd, iov[i].iov_base, iov[i].iov_len); 1366 1367 indices = (uint64_t)oprod << 32; 1368 hv_ring_put(wrd, (uint8_t *)&indices, sizeof(indices)); 1369 1370 virtio_membar_sync(); 1371 wrd->rd_ring->br_windex = wrd->rd_prod; 1372 virtio_membar_sync(); 1373 1374 /* Signal when the ring transitions from being empty to non-empty */ 1375 if (wrd->rd_ring->br_imask == 0 && 1376 wrd->rd_ring->br_rindex == oprod) 1377 *needsig = 1; 1378 else 1379 *needsig = 0; 1380 1381 return (0); 1382 } 1383 1384 int 1385 hv_channel_send(struct hv_channel *ch, void *data, uint32_t datalen, 1386 uint64_t rid, int type, uint32_t flags) 1387 { 1388 struct hv_softc *sc = ch->ch_sc; 1389 struct vmbus_chanpkt cp; 1390 struct iovec iov[3]; 1391 uint32_t pktlen, pktlen_aligned; 1392 uint64_t zeropad = 0; 1393 int rv, needsig = 0; 1394 1395 pktlen = sizeof(cp) + datalen; 1396 pktlen_aligned = roundup(pktlen, sizeof(uint64_t)); 1397 1398 cp.cp_hdr.cph_type = type; 1399 cp.cp_hdr.cph_flags = flags; 1400 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_hlen, sizeof(cp)); 1401 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_tlen, pktlen_aligned); 1402 cp.cp_hdr.cph_tid = rid; 1403 1404 iov[0].iov_base = &cp; 1405 iov[0].iov_len = sizeof(cp); 1406 1407 iov[1].iov_base = data; 1408 iov[1].iov_len = datalen; 1409 1410 iov[2].iov_base = &zeropad; 1411 iov[2].iov_len = pktlen_aligned - pktlen; 1412 1413 mtx_enter(&ch->ch_wrd.rd_lock); 1414 rv = hv_ring_write(&ch->ch_wrd, iov, 3, &needsig); 1415 mtx_leave(&ch->ch_wrd.rd_lock); 1416 if (rv == 0 && needsig) 1417 hv_channel_setevent(sc, ch); 1418 1419 return (rv); 1420 } 1421 1422 int 1423 hv_channel_send_sgl(struct hv_channel *ch, struct vmbus_gpa *sgl, 1424 uint32_t nsge, void *data, uint32_t datalen, uint64_t rid) 1425 { 1426 struct hv_softc *sc = ch->ch_sc; 1427 struct vmbus_chanpkt_sglist cp; 1428 struct iovec iov[4]; 1429 uint32_t buflen, pktlen, pktlen_aligned; 1430 uint64_t zeropad = 0; 1431 int rv, needsig = 0; 1432 1433 buflen = sizeof(struct vmbus_gpa) * nsge; 1434 pktlen = sizeof(cp) + datalen + buflen; 1435 pktlen_aligned = roundup(pktlen, sizeof(uint64_t)); 1436 1437 cp.cp_hdr.cph_type = VMBUS_CHANPKT_TYPE_GPA; 1438 cp.cp_hdr.cph_flags = VMBUS_CHANPKT_FLAG_RC; 1439 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_hlen, sizeof(cp) + buflen); 1440 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_tlen, pktlen_aligned); 1441 cp.cp_hdr.cph_tid = rid; 1442 cp.cp_gpa_cnt = nsge; 1443 cp.cp_rsvd = 0; 1444 1445 iov[0].iov_base = &cp; 1446 iov[0].iov_len = sizeof(cp); 1447 1448 iov[1].iov_base = sgl; 1449 iov[1].iov_len = buflen; 1450 1451 iov[2].iov_base = data; 1452 iov[2].iov_len = datalen; 1453 1454 iov[3].iov_base = &zeropad; 1455 iov[3].iov_len = pktlen_aligned - pktlen; 1456 1457 mtx_enter(&ch->ch_wrd.rd_lock); 1458 rv = hv_ring_write(&ch->ch_wrd, iov, 4, &needsig); 1459 mtx_leave(&ch->ch_wrd.rd_lock); 1460 if (rv == 0 && needsig) 1461 hv_channel_setevent(sc, ch); 1462 1463 return (rv); 1464 } 1465 1466 int 1467 hv_channel_send_prpl(struct hv_channel *ch, struct vmbus_gpa_range *prpl, 1468 uint32_t nprp, void *data, uint32_t datalen, uint64_t rid) 1469 { 1470 struct hv_softc *sc = ch->ch_sc; 1471 struct vmbus_chanpkt_prplist cp; 1472 struct iovec iov[4]; 1473 uint32_t buflen, pktlen, pktlen_aligned; 1474 uint64_t zeropad = 0; 1475 int rv, needsig = 0; 1476 1477 buflen = sizeof(struct vmbus_gpa_range) * (nprp + 1); 1478 pktlen = sizeof(cp) + datalen + buflen; 1479 pktlen_aligned = roundup(pktlen, sizeof(uint64_t)); 1480 1481 cp.cp_hdr.cph_type = VMBUS_CHANPKT_TYPE_GPA; 1482 cp.cp_hdr.cph_flags = VMBUS_CHANPKT_FLAG_RC; 1483 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_hlen, sizeof(cp) + buflen); 1484 VMBUS_CHANPKT_SETLEN(cp.cp_hdr.cph_tlen, pktlen_aligned); 1485 cp.cp_hdr.cph_tid = rid; 1486 cp.cp_range_cnt = 1; 1487 cp.cp_rsvd = 0; 1488 1489 iov[0].iov_base = &cp; 1490 iov[0].iov_len = sizeof(cp); 1491 1492 iov[1].iov_base = prpl; 1493 iov[1].iov_len = buflen; 1494 1495 iov[2].iov_base = data; 1496 iov[2].iov_len = datalen; 1497 1498 iov[3].iov_base = &zeropad; 1499 iov[3].iov_len = pktlen_aligned - pktlen; 1500 1501 mtx_enter(&ch->ch_wrd.rd_lock); 1502 rv = hv_ring_write(&ch->ch_wrd, iov, 4, &needsig); 1503 mtx_leave(&ch->ch_wrd.rd_lock); 1504 if (rv == 0 && needsig) 1505 hv_channel_setevent(sc, ch); 1506 1507 return (rv); 1508 } 1509 1510 int 1511 hv_ring_peek(struct hv_ring_data *rrd, void *data, uint32_t datalen) 1512 { 1513 uint32_t avail; 1514 1515 KASSERT(datalen <= rrd->rd_dsize); 1516 1517 hv_ring_avail(rrd, NULL, &avail); 1518 if (avail < datalen) 1519 return (EAGAIN); 1520 1521 hv_ring_get(rrd, (uint8_t *)data, datalen, 1); 1522 return (0); 1523 } 1524 1525 int 1526 hv_ring_read(struct hv_ring_data *rrd, void *data, uint32_t datalen, 1527 uint32_t offset) 1528 { 1529 uint64_t indices; 1530 uint32_t avail; 1531 1532 KASSERT(datalen <= rrd->rd_dsize); 1533 1534 hv_ring_avail(rrd, NULL, &avail); 1535 if (avail < datalen) { 1536 DPRINTF("%s: avail %u datalen %u\n", __func__, avail, datalen); 1537 return (EAGAIN); 1538 } 1539 1540 if (offset) { 1541 rrd->rd_cons += offset; 1542 if (rrd->rd_cons >= rrd->rd_dsize) 1543 rrd->rd_cons -= rrd->rd_dsize; 1544 } 1545 1546 hv_ring_get(rrd, (uint8_t *)data, datalen, 0); 1547 hv_ring_get(rrd, (uint8_t *)&indices, sizeof(indices), 0); 1548 1549 virtio_membar_sync(); 1550 rrd->rd_ring->br_rindex = rrd->rd_cons; 1551 1552 return (0); 1553 } 1554 1555 int 1556 hv_channel_recv(struct hv_channel *ch, void *data, uint32_t datalen, 1557 uint32_t *rlen, uint64_t *rid, int raw) 1558 { 1559 struct vmbus_chanpkt_hdr cph; 1560 uint32_t offset, pktlen; 1561 int rv; 1562 1563 *rlen = 0; 1564 1565 mtx_enter(&ch->ch_rrd.rd_lock); 1566 1567 if ((rv = hv_ring_peek(&ch->ch_rrd, &cph, sizeof(cph))) != 0) { 1568 mtx_leave(&ch->ch_rrd.rd_lock); 1569 return (rv); 1570 } 1571 1572 offset = raw ? 0 : VMBUS_CHANPKT_GETLEN(cph.cph_hlen); 1573 pktlen = VMBUS_CHANPKT_GETLEN(cph.cph_tlen) - offset; 1574 if (pktlen > datalen) { 1575 mtx_leave(&ch->ch_rrd.rd_lock); 1576 printf("%s: pktlen %u datalen %u\n", __func__, pktlen, datalen); 1577 return (EINVAL); 1578 } 1579 1580 rv = hv_ring_read(&ch->ch_rrd, data, pktlen, offset); 1581 if (rv == 0) { 1582 *rlen = pktlen; 1583 *rid = cph.cph_tid; 1584 } 1585 1586 mtx_leave(&ch->ch_rrd.rd_lock); 1587 1588 return (rv); 1589 } 1590 1591 static inline void 1592 hv_ring_mask(struct hv_ring_data *rd) 1593 { 1594 virtio_membar_sync(); 1595 rd->rd_ring->br_imask = 1; 1596 virtio_membar_sync(); 1597 } 1598 1599 static inline void 1600 hv_ring_unmask(struct hv_ring_data *rd) 1601 { 1602 virtio_membar_sync(); 1603 rd->rd_ring->br_imask = 0; 1604 virtio_membar_sync(); 1605 } 1606 1607 void 1608 hv_channel_pause(struct hv_channel *ch) 1609 { 1610 hv_ring_mask(&ch->ch_rrd); 1611 } 1612 1613 uint 1614 hv_channel_unpause(struct hv_channel *ch) 1615 { 1616 uint32_t avail; 1617 1618 hv_ring_unmask(&ch->ch_rrd); 1619 hv_ring_avail(&ch->ch_rrd, NULL, &avail); 1620 1621 return (avail); 1622 } 1623 1624 uint 1625 hv_channel_ready(struct hv_channel *ch) 1626 { 1627 uint32_t avail; 1628 1629 hv_ring_avail(&ch->ch_rrd, NULL, &avail); 1630 1631 return (avail); 1632 } 1633 1634 /* How many PFNs can be referenced by the header */ 1635 #define HV_NPFNHDR ((VMBUS_MSG_DSIZE_MAX - \ 1636 sizeof(struct vmbus_chanmsg_gpadl_conn)) / sizeof(uint64_t)) 1637 1638 /* How many PFNs can be referenced by the body */ 1639 #define HV_NPFNBODY ((VMBUS_MSG_DSIZE_MAX - \ 1640 sizeof(struct vmbus_chanmsg_gpadl_subconn)) / sizeof(uint64_t)) 1641 1642 int 1643 hv_handle_alloc(struct hv_channel *ch, void *buffer, uint32_t buflen, 1644 uint32_t *handle) 1645 { 1646 struct hv_softc *sc = ch->ch_sc; 1647 struct vmbus_chanmsg_gpadl_conn *hdr; 1648 struct vmbus_chanmsg_gpadl_subconn *cmd; 1649 struct vmbus_chanmsg_gpadl_connresp rsp; 1650 struct hv_msg *msg; 1651 int i, j, last, left, rv; 1652 int bodylen = 0, ncmds = 0, pfn = 0; 1653 int waitflag = cold ? M_NOWAIT : M_WAITOK; 1654 uint64_t *frames; 1655 paddr_t pa; 1656 caddr_t body; 1657 /* Total number of pages to reference */ 1658 int total = atop(buflen); 1659 /* Number of pages that will fit the header */ 1660 int inhdr = MIN(total, HV_NPFNHDR); 1661 1662 KASSERT((buflen & (PAGE_SIZE - 1)) == 0); 1663 1664 if ((msg = malloc(sizeof(*msg), M_DEVBUF, M_ZERO | waitflag)) == NULL) 1665 return (ENOMEM); 1666 1667 /* Prepare array of frame addresses */ 1668 if ((frames = mallocarray(total, sizeof(*frames), M_DEVBUF, M_ZERO | 1669 waitflag)) == NULL) { 1670 free(msg, M_DEVBUF, sizeof(*msg)); 1671 return (ENOMEM); 1672 } 1673 for (i = 0; i < total; i++) { 1674 if (!pmap_extract(pmap_kernel(), (vaddr_t)buffer + 1675 PAGE_SIZE * i, &pa)) { 1676 free(msg, M_DEVBUF, sizeof(*msg)); 1677 free(frames, M_DEVBUF, total * sizeof(*frames)); 1678 return (EFAULT); 1679 } 1680 frames[i] = atop(pa); 1681 } 1682 1683 msg->msg_req.hc_dsize = sizeof(struct vmbus_chanmsg_gpadl_conn) + 1684 inhdr * sizeof(uint64_t); 1685 hdr = (struct vmbus_chanmsg_gpadl_conn *)msg->msg_req.hc_data; 1686 msg->msg_rsp = &rsp; 1687 msg->msg_rsplen = sizeof(rsp); 1688 if (waitflag == M_NOWAIT) 1689 msg->msg_flags = MSGF_NOSLEEP; 1690 1691 left = total - inhdr; 1692 1693 /* Allocate additional gpadl_body structures if required */ 1694 if (left > 0) { 1695 ncmds = MAX(1, left / HV_NPFNBODY + left % HV_NPFNBODY); 1696 bodylen = ncmds * VMBUS_MSG_DSIZE_MAX; 1697 body = malloc(bodylen, M_DEVBUF, M_ZERO | waitflag); 1698 if (body == NULL) { 1699 free(msg, M_DEVBUF, sizeof(*msg)); 1700 free(frames, M_DEVBUF, atop(buflen) * sizeof(*frames)); 1701 return (ENOMEM); 1702 } 1703 } 1704 1705 *handle = atomic_inc_int_nv(&sc->sc_handle); 1706 1707 hdr->chm_hdr.chm_type = VMBUS_CHANMSG_GPADL_CONN; 1708 hdr->chm_chanid = ch->ch_id; 1709 hdr->chm_gpadl = *handle; 1710 1711 /* Single range for a contiguous buffer */ 1712 hdr->chm_range_cnt = 1; 1713 hdr->chm_range_len = sizeof(struct vmbus_gpa_range) + total * 1714 sizeof(uint64_t); 1715 hdr->chm_range.gpa_ofs = 0; 1716 hdr->chm_range.gpa_len = buflen; 1717 1718 /* Fit as many pages as possible into the header */ 1719 for (i = 0; i < inhdr; i++) 1720 hdr->chm_range.gpa_page[i] = frames[pfn++]; 1721 1722 for (i = 0; i < ncmds; i++) { 1723 cmd = (struct vmbus_chanmsg_gpadl_subconn *)(body + 1724 VMBUS_MSG_DSIZE_MAX * i); 1725 cmd->chm_hdr.chm_type = VMBUS_CHANMSG_GPADL_SUBCONN; 1726 cmd->chm_gpadl = *handle; 1727 last = MIN(left, HV_NPFNBODY); 1728 for (j = 0; j < last; j++) 1729 cmd->chm_gpa_page[j] = frames[pfn++]; 1730 left -= last; 1731 } 1732 1733 rv = hv_start(sc, msg); 1734 if (rv != 0) { 1735 DPRINTF("%s: GPADL_CONN failed\n", sc->sc_dev.dv_xname); 1736 goto out; 1737 } 1738 for (i = 0; i < ncmds; i++) { 1739 int cmdlen = sizeof(*cmd); 1740 cmd = (struct vmbus_chanmsg_gpadl_subconn *)(body + 1741 VMBUS_MSG_DSIZE_MAX * i); 1742 /* Last element can be short */ 1743 if (i == ncmds - 1) 1744 cmdlen += last * sizeof(uint64_t); 1745 else 1746 cmdlen += HV_NPFNBODY * sizeof(uint64_t); 1747 rv = hv_cmd(sc, cmd, cmdlen, NULL, 0, waitflag | HCF_NOREPLY); 1748 if (rv != 0) { 1749 DPRINTF("%s: GPADL_SUBCONN (iteration %d/%d) failed " 1750 "with %d\n", sc->sc_dev.dv_xname, i, ncmds, rv); 1751 goto out; 1752 } 1753 } 1754 rv = hv_reply(sc, msg); 1755 if (rv != 0) 1756 DPRINTF("%s: GPADL allocation failed with %d\n", 1757 sc->sc_dev.dv_xname, rv); 1758 1759 out: 1760 free(msg, M_DEVBUF, sizeof(*msg)); 1761 free(frames, M_DEVBUF, total * sizeof(*frames)); 1762 if (bodylen > 0) 1763 free(body, M_DEVBUF, bodylen); 1764 if (rv != 0) 1765 return (rv); 1766 1767 KASSERT(*handle == rsp.chm_gpadl); 1768 1769 return (0); 1770 } 1771 1772 void 1773 hv_handle_free(struct hv_channel *ch, uint32_t handle) 1774 { 1775 struct hv_softc *sc = ch->ch_sc; 1776 struct vmbus_chanmsg_gpadl_disconn cmd; 1777 struct vmbus_chanmsg_gpadl_disconn rsp; 1778 int rv; 1779 1780 memset(&cmd, 0, sizeof(cmd)); 1781 cmd.chm_hdr.chm_type = VMBUS_CHANMSG_GPADL_DISCONN; 1782 cmd.chm_chanid = ch->ch_id; 1783 cmd.chm_gpadl = handle; 1784 1785 rv = hv_cmd(sc, &cmd, sizeof(cmd), &rsp, sizeof(rsp), cold ? 1786 HCF_NOSLEEP : 0); 1787 if (rv) 1788 DPRINTF("%s: GPADL_DISCONN failed with %d\n", 1789 sc->sc_dev.dv_xname, rv); 1790 } 1791 1792 static int 1793 hv_attach_print(void *aux, const char *name) 1794 { 1795 struct hv_attach_args *aa = aux; 1796 1797 if (name) 1798 printf("\"%s\" at %s", aa->aa_ident, name); 1799 1800 return (UNCONF); 1801 } 1802 1803 int 1804 hv_attach_devices(struct hv_softc *sc) 1805 { 1806 struct hv_dev *dv; 1807 struct hv_channel *ch; 1808 1809 SLIST_INIT(&sc->sc_devs); 1810 mtx_init(&sc->sc_devlck, IPL_NET); 1811 1812 TAILQ_FOREACH(ch, &sc->sc_channels, ch_entry) { 1813 if (ch->ch_state != HV_CHANSTATE_OFFERED) 1814 continue; 1815 if (!(ch->ch_flags & CHF_MONITOR)) 1816 continue; 1817 dv = malloc(sizeof(*dv), M_DEVBUF, M_ZERO | M_NOWAIT); 1818 if (dv == NULL) { 1819 printf("%s: failed to allocate device object\n", 1820 sc->sc_dev.dv_xname); 1821 return (-1); 1822 } 1823 dv->dv_aa.aa_parent = sc; 1824 dv->dv_aa.aa_type = &ch->ch_type; 1825 dv->dv_aa.aa_inst = &ch->ch_inst; 1826 dv->dv_aa.aa_ident = ch->ch_ident; 1827 dv->dv_aa.aa_chan = ch; 1828 dv->dv_aa.aa_dmat = sc->sc_dmat; 1829 mtx_enter(&sc->sc_devlck); 1830 SLIST_INSERT_HEAD(&sc->sc_devs, dv, dv_entry); 1831 mtx_leave(&sc->sc_devlck); 1832 config_found((struct device *)sc, &dv->dv_aa, hv_attach_print); 1833 } 1834 return (0); 1835 } 1836 1837 void 1838 hv_evcount_attach(struct hv_channel *ch, const char *name) 1839 { 1840 struct hv_softc *sc = ch->ch_sc; 1841 1842 evcount_attach(&ch->ch_evcnt, name, &sc->sc_idtvec); 1843 } 1844