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