1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009-2012,2016-2017 Microsoft Corp. 5 * Copyright (c) 2012 NetApp Inc. 6 * Copyright (c) 2012 Citrix Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice unmodified, this list of conditions, and the following 14 * disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /** 32 * StorVSC driver for Hyper-V. This driver presents a SCSI HBA interface 33 * to the Comman Access Method (CAM) layer. CAM control blocks (CCBs) are 34 * converted into VSCSI protocol messages which are delivered to the parent 35 * partition StorVSP driver over the Hyper-V VMBUS. 36 */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/proc.h> 42 #include <sys/condvar.h> 43 #include <sys/time.h> 44 #include <sys/systm.h> 45 #include <sys/sysctl.h> 46 #include <sys/sockio.h> 47 #include <sys/mbuf.h> 48 #include <sys/malloc.h> 49 #include <sys/module.h> 50 #include <sys/kernel.h> 51 #include <sys/queue.h> 52 #include <sys/lock.h> 53 #include <sys/sx.h> 54 #include <sys/taskqueue.h> 55 #include <sys/bus.h> 56 #include <sys/mutex.h> 57 #include <sys/callout.h> 58 #include <sys/smp.h> 59 #include <vm/vm.h> 60 #include <vm/pmap.h> 61 #include <vm/uma.h> 62 #include <sys/lock.h> 63 #include <sys/sema.h> 64 #include <sys/eventhandler.h> 65 #include <machine/bus.h> 66 67 #include <cam/cam.h> 68 #include <cam/cam_ccb.h> 69 #include <cam/cam_periph.h> 70 #include <cam/cam_sim.h> 71 #include <cam/cam_xpt_sim.h> 72 #include <cam/cam_xpt_internal.h> 73 #include <cam/cam_debug.h> 74 #include <cam/scsi/scsi_all.h> 75 #include <cam/scsi/scsi_message.h> 76 77 #include <dev/hyperv/include/hyperv.h> 78 #include <dev/hyperv/include/vmbus.h> 79 #include "hv_vstorage.h" 80 #include "vmbus_if.h" 81 82 #define STORVSC_MAX_LUNS_PER_TARGET (64) 83 #define STORVSC_MAX_IO_REQUESTS (STORVSC_MAX_LUNS_PER_TARGET * 2) 84 #define BLKVSC_MAX_IDE_DISKS_PER_TARGET (1) 85 #define BLKVSC_MAX_IO_REQUESTS STORVSC_MAX_IO_REQUESTS 86 #define STORVSC_MAX_TARGETS (2) 87 88 #define VSTOR_PKT_SIZE (sizeof(struct vstor_packet) - vmscsi_size_delta) 89 90 /* 91 * 33 segments are needed to allow 128KB maxio, in case the data 92 * in the first page is _not_ PAGE_SIZE aligned, e.g. 93 * 94 * |<----------- 128KB ----------->| 95 * | | 96 * 0 2K 4K 8K 16K 124K 128K 130K 97 * | | | | | | | | 98 * +--+--+-----+-----+.......+-----+--+--+ 99 * | | | | | | | | | DATA 100 * | | | | | | | | | 101 * +--+--+-----+-----+.......------+--+--+ 102 * | | | | 103 * | 1| 31 | 1| ...... # of segments 104 */ 105 #define STORVSC_DATA_SEGCNT_MAX 33 106 #define STORVSC_DATA_SEGSZ_MAX PAGE_SIZE 107 #define STORVSC_DATA_SIZE_MAX \ 108 ((STORVSC_DATA_SEGCNT_MAX - 1) * STORVSC_DATA_SEGSZ_MAX) 109 110 struct storvsc_softc; 111 112 struct hv_sglist { 113 struct iovec sg_iov[STORVSC_DATA_SEGCNT_MAX]; 114 u_short sg_nseg; 115 u_short sg_maxseg; 116 }; 117 118 struct hv_sgl_node { 119 LIST_ENTRY(hv_sgl_node) link; 120 struct hv_sglist *sgl_data; 121 }; 122 123 struct hv_sgl_page_pool{ 124 LIST_HEAD(, hv_sgl_node) in_use_sgl_list; 125 LIST_HEAD(, hv_sgl_node) free_sgl_list; 126 boolean_t is_init; 127 } g_hv_sgl_page_pool; 128 129 enum storvsc_request_type { 130 WRITE_TYPE, 131 READ_TYPE, 132 UNKNOWN_TYPE 133 }; 134 135 SYSCTL_NODE(_hw, OID_AUTO, storvsc, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 136 "Hyper-V storage interface"); 137 138 static u_int hv_storvsc_use_win8ext_flags = 1; 139 SYSCTL_UINT(_hw_storvsc, OID_AUTO, use_win8ext_flags, CTLFLAG_RW, 140 &hv_storvsc_use_win8ext_flags, 0, 141 "Use win8 extension flags or not"); 142 143 static u_int hv_storvsc_use_pim_unmapped = 1; 144 SYSCTL_UINT(_hw_storvsc, OID_AUTO, use_pim_unmapped, CTLFLAG_RDTUN, 145 &hv_storvsc_use_pim_unmapped, 0, 146 "Optimize storvsc by using unmapped I/O"); 147 148 static u_int hv_storvsc_ringbuffer_size = (64 * PAGE_SIZE); 149 SYSCTL_UINT(_hw_storvsc, OID_AUTO, ringbuffer_size, CTLFLAG_RDTUN, 150 &hv_storvsc_ringbuffer_size, 0, "Hyper-V storage ringbuffer size"); 151 152 static u_int hv_storvsc_max_io = 512; 153 SYSCTL_UINT(_hw_storvsc, OID_AUTO, max_io, CTLFLAG_RDTUN, 154 &hv_storvsc_max_io, 0, "Hyper-V storage max io limit"); 155 156 static int hv_storvsc_chan_cnt = 0; 157 SYSCTL_INT(_hw_storvsc, OID_AUTO, chan_cnt, CTLFLAG_RDTUN, 158 &hv_storvsc_chan_cnt, 0, "# of channels to use"); 159 #ifdef DIAGNOSTIC 160 static int hv_storvsc_srb_status = -1; 161 SYSCTL_INT(_hw_storvsc, OID_AUTO, srb_status, CTLFLAG_RW, 162 &hv_storvsc_srb_status, 0, "srb_status to inject"); 163 TUNABLE_INT("hw_storvsc.srb_status", &hv_storvsc_srb_status); 164 #endif /* DIAGNOSTIC */ 165 166 #define STORVSC_MAX_IO \ 167 vmbus_chan_prplist_nelem(hv_storvsc_ringbuffer_size, \ 168 STORVSC_DATA_SEGCNT_MAX, VSTOR_PKT_SIZE) 169 170 struct hv_storvsc_sysctl { 171 u_long data_bio_cnt; 172 u_long data_vaddr_cnt; 173 u_long data_sg_cnt; 174 u_long chan_send_cnt[MAXCPU]; 175 }; 176 177 struct storvsc_gpa_range { 178 struct vmbus_gpa_range gpa_range; 179 uint64_t gpa_page[STORVSC_DATA_SEGCNT_MAX]; 180 } __packed; 181 182 struct hv_storvsc_request { 183 LIST_ENTRY(hv_storvsc_request) link; 184 struct vstor_packet vstor_packet; 185 int prp_cnt; 186 struct storvsc_gpa_range prp_list; 187 void *sense_data; 188 uint8_t sense_info_len; 189 uint8_t retries; 190 union ccb *ccb; 191 struct storvsc_softc *softc; 192 struct callout callout; 193 struct sema synch_sema; /*Synchronize the request/response if needed */ 194 struct hv_sglist *bounce_sgl; 195 unsigned int bounce_sgl_count; 196 uint64_t not_aligned_seg_bits; 197 bus_dmamap_t data_dmap; 198 }; 199 200 struct storvsc_softc { 201 struct vmbus_channel *hs_chan; 202 LIST_HEAD(, hv_storvsc_request) hs_free_list; 203 struct mtx hs_lock; 204 struct storvsc_driver_props *hs_drv_props; 205 int hs_unit; 206 uint32_t hs_frozen; 207 struct cam_sim *hs_sim; 208 struct cam_path *hs_path; 209 uint32_t hs_num_out_reqs; 210 boolean_t hs_destroy; 211 boolean_t hs_drain_notify; 212 struct sema hs_drain_sema; 213 struct hv_storvsc_request hs_init_req; 214 struct hv_storvsc_request hs_reset_req; 215 device_t hs_dev; 216 bus_dma_tag_t storvsc_req_dtag; 217 struct hv_storvsc_sysctl sysctl_data; 218 uint32_t hs_nchan; 219 struct vmbus_channel *hs_sel_chan[MAXCPU]; 220 }; 221 222 static eventhandler_tag storvsc_handler_tag; 223 /* 224 * The size of the vmscsi_request has changed in win8. The 225 * additional size is for the newly added elements in the 226 * structure. These elements are valid only when we are talking 227 * to a win8 host. 228 * Track the correct size we need to apply. 229 */ 230 static int vmscsi_size_delta = sizeof(struct vmscsi_win8_extension); 231 232 /** 233 * HyperV storvsc timeout testing cases: 234 * a. IO returned after first timeout; 235 * b. IO returned after second timeout and queue freeze; 236 * c. IO returned while timer handler is running 237 * The first can be tested by "sg_senddiag -vv /dev/daX", 238 * and the second and third can be done by 239 * "sg_wr_mode -v -p 08 -c 0,1a -m 0,ff /dev/daX". 240 */ 241 #define HVS_TIMEOUT_TEST 0 242 243 /* 244 * Bus/adapter reset functionality on the Hyper-V host is 245 * buggy and it will be disabled until 246 * it can be further tested. 247 */ 248 #define HVS_HOST_RESET 0 249 250 struct storvsc_driver_props { 251 char *drv_name; 252 char *drv_desc; 253 uint8_t drv_max_luns_per_target; 254 uint32_t drv_max_ios_per_target; 255 uint32_t drv_ringbuffer_size; 256 }; 257 258 enum hv_storage_type { 259 DRIVER_BLKVSC, 260 DRIVER_STORVSC, 261 DRIVER_UNKNOWN 262 }; 263 264 #define HS_MAX_ADAPTERS 10 265 266 #define HV_STORAGE_SUPPORTS_MULTI_CHANNEL 0x1 267 268 /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */ 269 static const struct hyperv_guid gStorVscDeviceType={ 270 .hv_guid = {0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, 271 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f} 272 }; 273 274 /* {32412632-86cb-44a2-9b5c-50d1417354f5} */ 275 static const struct hyperv_guid gBlkVscDeviceType={ 276 .hv_guid = {0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, 277 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5} 278 }; 279 280 static struct storvsc_driver_props g_drv_props_table[] = { 281 {"blkvsc", "Hyper-V IDE", 282 BLKVSC_MAX_IDE_DISKS_PER_TARGET, BLKVSC_MAX_IO_REQUESTS, 283 20*PAGE_SIZE}, 284 {"storvsc", "Hyper-V SCSI", 285 STORVSC_MAX_LUNS_PER_TARGET, STORVSC_MAX_IO_REQUESTS, 286 20*PAGE_SIZE} 287 }; 288 289 /* 290 * Sense buffer size changed in win8; have a run-time 291 * variable to track the size we should use. 292 */ 293 static int sense_buffer_size = PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE; 294 295 /* 296 * The storage protocol version is determined during the 297 * initial exchange with the host. It will indicate which 298 * storage functionality is available in the host. 299 */ 300 static int vmstor_proto_version; 301 302 struct vmstor_proto { 303 int proto_version; 304 int sense_buffer_size; 305 int vmscsi_size_delta; 306 }; 307 308 static const struct vmstor_proto vmstor_proto_list[] = { 309 { 310 VMSTOR_PROTOCOL_VERSION_WIN10, 311 POST_WIN7_STORVSC_SENSE_BUFFER_SIZE, 312 0 313 }, 314 { 315 VMSTOR_PROTOCOL_VERSION_WIN8_1, 316 POST_WIN7_STORVSC_SENSE_BUFFER_SIZE, 317 0 318 }, 319 { 320 VMSTOR_PROTOCOL_VERSION_WIN8, 321 POST_WIN7_STORVSC_SENSE_BUFFER_SIZE, 322 0 323 }, 324 { 325 VMSTOR_PROTOCOL_VERSION_WIN7, 326 PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE, 327 sizeof(struct vmscsi_win8_extension), 328 }, 329 { 330 VMSTOR_PROTOCOL_VERSION_WIN6, 331 PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE, 332 sizeof(struct vmscsi_win8_extension), 333 } 334 }; 335 336 /* static functions */ 337 static int storvsc_probe(device_t dev); 338 static int storvsc_attach(device_t dev); 339 static int storvsc_detach(device_t dev); 340 static void storvsc_poll(struct cam_sim * sim); 341 static void storvsc_action(struct cam_sim * sim, union ccb * ccb); 342 static int create_storvsc_request(union ccb *ccb, struct hv_storvsc_request *reqp); 343 static void storvsc_free_request(struct storvsc_softc *sc, struct hv_storvsc_request *reqp); 344 static enum hv_storage_type storvsc_get_storage_type(device_t dev); 345 static void hv_storvsc_rescan_target(struct storvsc_softc *sc); 346 static void hv_storvsc_on_channel_callback(struct vmbus_channel *chan, void *xsc); 347 static void hv_storvsc_on_iocompletion( struct storvsc_softc *sc, 348 struct vstor_packet *vstor_packet, 349 struct hv_storvsc_request *request); 350 static int hv_storvsc_connect_vsp(struct storvsc_softc *); 351 static void storvsc_io_done(struct hv_storvsc_request *reqp); 352 static void storvsc_copy_sgl_to_bounce_buf(struct hv_sglist *bounce_sgl, 353 bus_dma_segment_t *orig_sgl, 354 unsigned int orig_sgl_count, 355 uint64_t seg_bits); 356 void storvsc_copy_from_bounce_buf_to_sgl(bus_dma_segment_t *dest_sgl, 357 unsigned int dest_sgl_count, 358 struct hv_sglist *src_sgl, 359 uint64_t seg_bits); 360 361 static device_method_t storvsc_methods[] = { 362 /* Device interface */ 363 DEVMETHOD(device_probe, storvsc_probe), 364 DEVMETHOD(device_attach, storvsc_attach), 365 DEVMETHOD(device_detach, storvsc_detach), 366 DEVMETHOD(device_shutdown, bus_generic_shutdown), 367 DEVMETHOD_END 368 }; 369 370 static driver_t storvsc_driver = { 371 "storvsc", storvsc_methods, sizeof(struct storvsc_softc), 372 }; 373 374 static devclass_t storvsc_devclass; 375 DRIVER_MODULE(storvsc, vmbus, storvsc_driver, storvsc_devclass, 0, 0); 376 MODULE_VERSION(storvsc, 1); 377 MODULE_DEPEND(storvsc, vmbus, 1, 1, 1); 378 379 static void 380 storvsc_subchan_attach(struct storvsc_softc *sc, 381 struct vmbus_channel *new_channel) 382 { 383 struct vmstor_chan_props props; 384 385 memset(&props, 0, sizeof(props)); 386 387 vmbus_chan_cpu_rr(new_channel); 388 vmbus_chan_open(new_channel, 389 sc->hs_drv_props->drv_ringbuffer_size, 390 sc->hs_drv_props->drv_ringbuffer_size, 391 (void *)&props, 392 sizeof(struct vmstor_chan_props), 393 hv_storvsc_on_channel_callback, sc); 394 } 395 396 /** 397 * @brief Send multi-channel creation request to host 398 * 399 * @param device a Hyper-V device pointer 400 * @param max_chans the max channels supported by vmbus 401 */ 402 static void 403 storvsc_send_multichannel_request(struct storvsc_softc *sc, int max_subch) 404 { 405 struct vmbus_channel **subchan; 406 struct hv_storvsc_request *request; 407 struct vstor_packet *vstor_packet; 408 int request_subch; 409 int i; 410 411 /* get sub-channel count that need to create */ 412 request_subch = MIN(max_subch, mp_ncpus - 1); 413 414 request = &sc->hs_init_req; 415 416 /* request the host to create multi-channel */ 417 memset(request, 0, sizeof(struct hv_storvsc_request)); 418 419 sema_init(&request->synch_sema, 0, ("stor_synch_sema")); 420 421 vstor_packet = &request->vstor_packet; 422 423 vstor_packet->operation = VSTOR_OPERATION_CREATE_MULTI_CHANNELS; 424 vstor_packet->flags = REQUEST_COMPLETION_FLAG; 425 vstor_packet->u.multi_channels_cnt = request_subch; 426 427 vmbus_chan_send(sc->hs_chan, 428 VMBUS_CHANPKT_TYPE_INBAND, VMBUS_CHANPKT_FLAG_RC, 429 vstor_packet, VSTOR_PKT_SIZE, (uint64_t)(uintptr_t)request); 430 431 sema_wait(&request->synch_sema); 432 433 if (vstor_packet->operation != VSTOR_OPERATION_COMPLETEIO || 434 vstor_packet->status != 0) { 435 printf("Storvsc_error: create multi-channel invalid operation " 436 "(%d) or statue (%u)\n", 437 vstor_packet->operation, vstor_packet->status); 438 return; 439 } 440 441 /* Update channel count */ 442 sc->hs_nchan = request_subch + 1; 443 444 /* Wait for sub-channels setup to complete. */ 445 subchan = vmbus_subchan_get(sc->hs_chan, request_subch); 446 447 /* Attach the sub-channels. */ 448 for (i = 0; i < request_subch; ++i) 449 storvsc_subchan_attach(sc, subchan[i]); 450 451 /* Release the sub-channels. */ 452 vmbus_subchan_rel(subchan, request_subch); 453 454 if (bootverbose) 455 printf("Storvsc create multi-channel success!\n"); 456 } 457 458 /** 459 * @brief initialize channel connection to parent partition 460 * 461 * @param dev a Hyper-V device pointer 462 * @returns 0 on success, non-zero error on failure 463 */ 464 static int 465 hv_storvsc_channel_init(struct storvsc_softc *sc) 466 { 467 int ret = 0, i; 468 struct hv_storvsc_request *request; 469 struct vstor_packet *vstor_packet; 470 uint16_t max_subch; 471 boolean_t support_multichannel; 472 uint32_t version; 473 474 max_subch = 0; 475 support_multichannel = FALSE; 476 477 request = &sc->hs_init_req; 478 memset(request, 0, sizeof(struct hv_storvsc_request)); 479 vstor_packet = &request->vstor_packet; 480 request->softc = sc; 481 482 /** 483 * Initiate the vsc/vsp initialization protocol on the open channel 484 */ 485 sema_init(&request->synch_sema, 0, ("stor_synch_sema")); 486 487 vstor_packet->operation = VSTOR_OPERATION_BEGININITIALIZATION; 488 vstor_packet->flags = REQUEST_COMPLETION_FLAG; 489 490 491 ret = vmbus_chan_send(sc->hs_chan, 492 VMBUS_CHANPKT_TYPE_INBAND, VMBUS_CHANPKT_FLAG_RC, 493 vstor_packet, VSTOR_PKT_SIZE, (uint64_t)(uintptr_t)request); 494 495 if (ret != 0) 496 goto cleanup; 497 498 sema_wait(&request->synch_sema); 499 500 if (vstor_packet->operation != VSTOR_OPERATION_COMPLETEIO || 501 vstor_packet->status != 0) { 502 goto cleanup; 503 } 504 505 for (i = 0; i < nitems(vmstor_proto_list); i++) { 506 /* reuse the packet for version range supported */ 507 508 memset(vstor_packet, 0, sizeof(struct vstor_packet)); 509 vstor_packet->operation = VSTOR_OPERATION_QUERYPROTOCOLVERSION; 510 vstor_packet->flags = REQUEST_COMPLETION_FLAG; 511 512 vstor_packet->u.version.major_minor = 513 vmstor_proto_list[i].proto_version; 514 515 /* revision is only significant for Windows guests */ 516 vstor_packet->u.version.revision = 0; 517 518 ret = vmbus_chan_send(sc->hs_chan, 519 VMBUS_CHANPKT_TYPE_INBAND, VMBUS_CHANPKT_FLAG_RC, 520 vstor_packet, VSTOR_PKT_SIZE, (uint64_t)(uintptr_t)request); 521 522 if (ret != 0) 523 goto cleanup; 524 525 sema_wait(&request->synch_sema); 526 527 if (vstor_packet->operation != VSTOR_OPERATION_COMPLETEIO) { 528 ret = EINVAL; 529 goto cleanup; 530 } 531 if (vstor_packet->status == 0) { 532 vmstor_proto_version = 533 vmstor_proto_list[i].proto_version; 534 sense_buffer_size = 535 vmstor_proto_list[i].sense_buffer_size; 536 vmscsi_size_delta = 537 vmstor_proto_list[i].vmscsi_size_delta; 538 break; 539 } 540 } 541 542 if (vstor_packet->status != 0) { 543 ret = EINVAL; 544 goto cleanup; 545 } 546 /** 547 * Query channel properties 548 */ 549 memset(vstor_packet, 0, sizeof(struct vstor_packet)); 550 vstor_packet->operation = VSTOR_OPERATION_QUERYPROPERTIES; 551 vstor_packet->flags = REQUEST_COMPLETION_FLAG; 552 553 ret = vmbus_chan_send(sc->hs_chan, 554 VMBUS_CHANPKT_TYPE_INBAND, VMBUS_CHANPKT_FLAG_RC, 555 vstor_packet, VSTOR_PKT_SIZE, (uint64_t)(uintptr_t)request); 556 557 if ( ret != 0) 558 goto cleanup; 559 560 sema_wait(&request->synch_sema); 561 562 /* TODO: Check returned version */ 563 if (vstor_packet->operation != VSTOR_OPERATION_COMPLETEIO || 564 vstor_packet->status != 0) { 565 goto cleanup; 566 } 567 568 max_subch = vstor_packet->u.chan_props.max_channel_cnt; 569 if (hv_storvsc_chan_cnt > 0 && hv_storvsc_chan_cnt < (max_subch + 1)) 570 max_subch = hv_storvsc_chan_cnt - 1; 571 572 /* multi-channels feature is supported by WIN8 and above version */ 573 version = VMBUS_GET_VERSION(device_get_parent(sc->hs_dev), sc->hs_dev); 574 if (version != VMBUS_VERSION_WIN7 && version != VMBUS_VERSION_WS2008 && 575 (vstor_packet->u.chan_props.flags & 576 HV_STORAGE_SUPPORTS_MULTI_CHANNEL)) { 577 support_multichannel = TRUE; 578 } 579 if (bootverbose) { 580 device_printf(sc->hs_dev, "max chans %d%s\n", max_subch + 1, 581 support_multichannel ? ", multi-chan capable" : ""); 582 } 583 584 memset(vstor_packet, 0, sizeof(struct vstor_packet)); 585 vstor_packet->operation = VSTOR_OPERATION_ENDINITIALIZATION; 586 vstor_packet->flags = REQUEST_COMPLETION_FLAG; 587 588 ret = vmbus_chan_send(sc->hs_chan, 589 VMBUS_CHANPKT_TYPE_INBAND, VMBUS_CHANPKT_FLAG_RC, 590 vstor_packet, VSTOR_PKT_SIZE, (uint64_t)(uintptr_t)request); 591 592 if (ret != 0) { 593 goto cleanup; 594 } 595 596 sema_wait(&request->synch_sema); 597 598 if (vstor_packet->operation != VSTOR_OPERATION_COMPLETEIO || 599 vstor_packet->status != 0) 600 goto cleanup; 601 602 /* 603 * If multi-channel is supported, send multichannel create 604 * request to host. 605 */ 606 if (support_multichannel && max_subch > 0) 607 storvsc_send_multichannel_request(sc, max_subch); 608 cleanup: 609 sema_destroy(&request->synch_sema); 610 return (ret); 611 } 612 613 /** 614 * @brief Open channel connection to paraent partition StorVSP driver 615 * 616 * Open and initialize channel connection to parent partition StorVSP driver. 617 * 618 * @param pointer to a Hyper-V device 619 * @returns 0 on success, non-zero error on failure 620 */ 621 static int 622 hv_storvsc_connect_vsp(struct storvsc_softc *sc) 623 { 624 int ret = 0; 625 struct vmstor_chan_props props; 626 627 memset(&props, 0, sizeof(struct vmstor_chan_props)); 628 629 /* 630 * Open the channel 631 */ 632 vmbus_chan_cpu_rr(sc->hs_chan); 633 ret = vmbus_chan_open( 634 sc->hs_chan, 635 sc->hs_drv_props->drv_ringbuffer_size, 636 sc->hs_drv_props->drv_ringbuffer_size, 637 (void *)&props, 638 sizeof(struct vmstor_chan_props), 639 hv_storvsc_on_channel_callback, sc); 640 641 if (ret != 0) { 642 return ret; 643 } 644 645 ret = hv_storvsc_channel_init(sc); 646 return (ret); 647 } 648 649 #if HVS_HOST_RESET 650 static int 651 hv_storvsc_host_reset(struct storvsc_softc *sc) 652 { 653 int ret = 0; 654 655 struct hv_storvsc_request *request; 656 struct vstor_packet *vstor_packet; 657 658 request = &sc->hs_reset_req; 659 request->softc = sc; 660 vstor_packet = &request->vstor_packet; 661 662 sema_init(&request->synch_sema, 0, "stor synch sema"); 663 664 vstor_packet->operation = VSTOR_OPERATION_RESETBUS; 665 vstor_packet->flags = REQUEST_COMPLETION_FLAG; 666 667 ret = vmbus_chan_send(dev->channel, 668 VMBUS_CHANPKT_TYPE_INBAND, VMBUS_CHANPKT_FLAG_RC, 669 vstor_packet, VSTOR_PKT_SIZE, 670 (uint64_t)(uintptr_t)&sc->hs_reset_req); 671 672 if (ret != 0) { 673 goto cleanup; 674 } 675 676 sema_wait(&request->synch_sema); 677 678 /* 679 * At this point, all outstanding requests in the adapter 680 * should have been flushed out and return to us 681 */ 682 683 cleanup: 684 sema_destroy(&request->synch_sema); 685 return (ret); 686 } 687 #endif /* HVS_HOST_RESET */ 688 689 /** 690 * @brief Function to initiate an I/O request 691 * 692 * @param device Hyper-V device pointer 693 * @param request pointer to a request structure 694 * @returns 0 on success, non-zero error on failure 695 */ 696 static int 697 hv_storvsc_io_request(struct storvsc_softc *sc, 698 struct hv_storvsc_request *request) 699 { 700 struct vstor_packet *vstor_packet = &request->vstor_packet; 701 struct vmbus_channel* outgoing_channel = NULL; 702 int ret = 0, ch_sel; 703 704 vstor_packet->flags |= REQUEST_COMPLETION_FLAG; 705 706 vstor_packet->u.vm_srb.length = 707 sizeof(struct vmscsi_req) - vmscsi_size_delta; 708 709 vstor_packet->u.vm_srb.sense_info_len = sense_buffer_size; 710 711 vstor_packet->u.vm_srb.transfer_len = 712 request->prp_list.gpa_range.gpa_len; 713 714 vstor_packet->operation = VSTOR_OPERATION_EXECUTESRB; 715 716 ch_sel = (vstor_packet->u.vm_srb.lun + curcpu) % sc->hs_nchan; 717 /* 718 * If we are panic'ing, then we are dumping core. Since storvsc_polls 719 * always uses sc->hs_chan, then we must send to that channel or a poll 720 * timeout will occur. 721 */ 722 if (panicstr) { 723 outgoing_channel = sc->hs_chan; 724 } else { 725 outgoing_channel = sc->hs_sel_chan[ch_sel]; 726 } 727 728 mtx_unlock(&request->softc->hs_lock); 729 if (request->prp_list.gpa_range.gpa_len) { 730 ret = vmbus_chan_send_prplist(outgoing_channel, 731 &request->prp_list.gpa_range, request->prp_cnt, 732 vstor_packet, VSTOR_PKT_SIZE, (uint64_t)(uintptr_t)request); 733 } else { 734 ret = vmbus_chan_send(outgoing_channel, 735 VMBUS_CHANPKT_TYPE_INBAND, VMBUS_CHANPKT_FLAG_RC, 736 vstor_packet, VSTOR_PKT_SIZE, (uint64_t)(uintptr_t)request); 737 } 738 /* statistic for successful request sending on each channel */ 739 if (!ret) { 740 sc->sysctl_data.chan_send_cnt[ch_sel]++; 741 } 742 mtx_lock(&request->softc->hs_lock); 743 744 if (ret != 0) { 745 printf("Unable to send packet %p ret %d", vstor_packet, ret); 746 } else { 747 atomic_add_int(&sc->hs_num_out_reqs, 1); 748 } 749 750 return (ret); 751 } 752 753 754 /** 755 * Process IO_COMPLETION_OPERATION and ready 756 * the result to be completed for upper layer 757 * processing by the CAM layer. 758 */ 759 static void 760 hv_storvsc_on_iocompletion(struct storvsc_softc *sc, 761 struct vstor_packet *vstor_packet, 762 struct hv_storvsc_request *request) 763 { 764 struct vmscsi_req *vm_srb; 765 766 vm_srb = &vstor_packet->u.vm_srb; 767 768 /* 769 * Copy some fields of the host's response into the request structure, 770 * because the fields will be used later in storvsc_io_done(). 771 */ 772 request->vstor_packet.u.vm_srb.scsi_status = vm_srb->scsi_status; 773 request->vstor_packet.u.vm_srb.srb_status = vm_srb->srb_status; 774 request->vstor_packet.u.vm_srb.transfer_len = vm_srb->transfer_len; 775 776 if (((vm_srb->scsi_status & 0xFF) == SCSI_STATUS_CHECK_COND) && 777 (vm_srb->srb_status & SRB_STATUS_AUTOSENSE_VALID)) { 778 /* Autosense data available */ 779 780 KASSERT(vm_srb->sense_info_len <= request->sense_info_len, 781 ("vm_srb->sense_info_len <= " 782 "request->sense_info_len")); 783 784 memcpy(request->sense_data, vm_srb->u.sense_data, 785 vm_srb->sense_info_len); 786 787 request->sense_info_len = vm_srb->sense_info_len; 788 } 789 790 /* Complete request by passing to the CAM layer */ 791 storvsc_io_done(request); 792 atomic_subtract_int(&sc->hs_num_out_reqs, 1); 793 if (sc->hs_drain_notify && (sc->hs_num_out_reqs == 0)) { 794 sema_post(&sc->hs_drain_sema); 795 } 796 } 797 798 static void 799 hv_storvsc_rescan_target(struct storvsc_softc *sc) 800 { 801 path_id_t pathid; 802 target_id_t targetid; 803 union ccb *ccb; 804 805 pathid = cam_sim_path(sc->hs_sim); 806 targetid = CAM_TARGET_WILDCARD; 807 808 /* 809 * Allocate a CCB and schedule a rescan. 810 */ 811 ccb = xpt_alloc_ccb_nowait(); 812 if (ccb == NULL) { 813 printf("unable to alloc CCB for rescan\n"); 814 return; 815 } 816 817 if (xpt_create_path(&ccb->ccb_h.path, NULL, pathid, targetid, 818 CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 819 printf("unable to create path for rescan, pathid: %u," 820 "targetid: %u\n", pathid, targetid); 821 xpt_free_ccb(ccb); 822 return; 823 } 824 825 if (targetid == CAM_TARGET_WILDCARD) 826 ccb->ccb_h.func_code = XPT_SCAN_BUS; 827 else 828 ccb->ccb_h.func_code = XPT_SCAN_TGT; 829 830 xpt_rescan(ccb); 831 } 832 833 static void 834 hv_storvsc_on_channel_callback(struct vmbus_channel *channel, void *xsc) 835 { 836 int ret = 0; 837 struct storvsc_softc *sc = xsc; 838 uint32_t bytes_recvd; 839 uint64_t request_id; 840 uint8_t packet[roundup2(sizeof(struct vstor_packet), 8)]; 841 struct hv_storvsc_request *request; 842 struct vstor_packet *vstor_packet; 843 844 bytes_recvd = roundup2(VSTOR_PKT_SIZE, 8); 845 ret = vmbus_chan_recv(channel, packet, &bytes_recvd, &request_id); 846 KASSERT(ret != ENOBUFS, ("storvsc recvbuf is not large enough")); 847 /* XXX check bytes_recvd to make sure that it contains enough data */ 848 849 while ((ret == 0) && (bytes_recvd > 0)) { 850 request = (struct hv_storvsc_request *)(uintptr_t)request_id; 851 852 if ((request == &sc->hs_init_req) || 853 (request == &sc->hs_reset_req)) { 854 memcpy(&request->vstor_packet, packet, 855 sizeof(struct vstor_packet)); 856 sema_post(&request->synch_sema); 857 } else { 858 vstor_packet = (struct vstor_packet *)packet; 859 switch(vstor_packet->operation) { 860 case VSTOR_OPERATION_COMPLETEIO: 861 if (request == NULL) 862 panic("VMBUS: storvsc received a " 863 "packet with NULL request id in " 864 "COMPLETEIO operation."); 865 866 hv_storvsc_on_iocompletion(sc, 867 vstor_packet, request); 868 break; 869 case VSTOR_OPERATION_REMOVEDEVICE: 870 printf("VMBUS: storvsc operation %d not " 871 "implemented.\n", vstor_packet->operation); 872 /* TODO: implement */ 873 break; 874 case VSTOR_OPERATION_ENUMERATE_BUS: 875 hv_storvsc_rescan_target(sc); 876 break; 877 default: 878 break; 879 } 880 } 881 882 bytes_recvd = roundup2(VSTOR_PKT_SIZE, 8), 883 ret = vmbus_chan_recv(channel, packet, &bytes_recvd, 884 &request_id); 885 KASSERT(ret != ENOBUFS, 886 ("storvsc recvbuf is not large enough")); 887 /* 888 * XXX check bytes_recvd to make sure that it contains 889 * enough data 890 */ 891 } 892 } 893 894 /** 895 * @brief StorVSC probe function 896 * 897 * Device probe function. Returns 0 if the input device is a StorVSC 898 * device. Otherwise, a ENXIO is returned. If the input device is 899 * for BlkVSC (paravirtual IDE) device and this support is disabled in 900 * favor of the emulated ATA/IDE device, return ENXIO. 901 * 902 * @param a device 903 * @returns 0 on success, ENXIO if not a matcing StorVSC device 904 */ 905 static int 906 storvsc_probe(device_t dev) 907 { 908 int ret = ENXIO; 909 910 switch (storvsc_get_storage_type(dev)) { 911 case DRIVER_BLKVSC: 912 if(bootverbose) 913 device_printf(dev, 914 "Enlightened ATA/IDE detected\n"); 915 device_set_desc(dev, g_drv_props_table[DRIVER_BLKVSC].drv_desc); 916 ret = BUS_PROBE_DEFAULT; 917 break; 918 case DRIVER_STORVSC: 919 if(bootverbose) 920 device_printf(dev, "Enlightened SCSI device detected\n"); 921 device_set_desc(dev, g_drv_props_table[DRIVER_STORVSC].drv_desc); 922 ret = BUS_PROBE_DEFAULT; 923 break; 924 default: 925 ret = ENXIO; 926 } 927 return (ret); 928 } 929 930 static void 931 storvsc_create_chan_sel(struct storvsc_softc *sc) 932 { 933 struct vmbus_channel **subch; 934 int i, nsubch; 935 936 sc->hs_sel_chan[0] = sc->hs_chan; 937 nsubch = sc->hs_nchan - 1; 938 if (nsubch == 0) 939 return; 940 941 subch = vmbus_subchan_get(sc->hs_chan, nsubch); 942 for (i = 0; i < nsubch; i++) 943 sc->hs_sel_chan[i + 1] = subch[i]; 944 vmbus_subchan_rel(subch, nsubch); 945 } 946 947 static int 948 storvsc_init_requests(device_t dev) 949 { 950 struct storvsc_softc *sc = device_get_softc(dev); 951 struct hv_storvsc_request *reqp; 952 int error, i; 953 954 LIST_INIT(&sc->hs_free_list); 955 956 error = bus_dma_tag_create( 957 bus_get_dma_tag(dev), /* parent */ 958 1, /* alignment */ 959 PAGE_SIZE, /* boundary */ 960 BUS_SPACE_MAXADDR, /* lowaddr */ 961 BUS_SPACE_MAXADDR, /* highaddr */ 962 NULL, NULL, /* filter, filterarg */ 963 STORVSC_DATA_SIZE_MAX, /* maxsize */ 964 STORVSC_DATA_SEGCNT_MAX, /* nsegments */ 965 STORVSC_DATA_SEGSZ_MAX, /* maxsegsize */ 966 0, /* flags */ 967 NULL, /* lockfunc */ 968 NULL, /* lockfuncarg */ 969 &sc->storvsc_req_dtag); 970 if (error) { 971 device_printf(dev, "failed to create storvsc dma tag\n"); 972 return (error); 973 } 974 975 for (i = 0; i < sc->hs_drv_props->drv_max_ios_per_target; ++i) { 976 reqp = malloc(sizeof(struct hv_storvsc_request), 977 M_DEVBUF, M_WAITOK|M_ZERO); 978 reqp->softc = sc; 979 error = bus_dmamap_create(sc->storvsc_req_dtag, 0, 980 &reqp->data_dmap); 981 if (error) { 982 device_printf(dev, "failed to allocate storvsc " 983 "data dmamap\n"); 984 goto cleanup; 985 } 986 LIST_INSERT_HEAD(&sc->hs_free_list, reqp, link); 987 } 988 return (0); 989 990 cleanup: 991 while ((reqp = LIST_FIRST(&sc->hs_free_list)) != NULL) { 992 LIST_REMOVE(reqp, link); 993 bus_dmamap_destroy(sc->storvsc_req_dtag, reqp->data_dmap); 994 free(reqp, M_DEVBUF); 995 } 996 return (error); 997 } 998 999 static void 1000 storvsc_sysctl(device_t dev) 1001 { 1002 struct sysctl_oid_list *child; 1003 struct sysctl_ctx_list *ctx; 1004 struct sysctl_oid *ch_tree, *chid_tree; 1005 struct storvsc_softc *sc; 1006 char name[16]; 1007 int i; 1008 1009 sc = device_get_softc(dev); 1010 ctx = device_get_sysctl_ctx(dev); 1011 child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev)); 1012 1013 SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "data_bio_cnt", 1014 CTLFLAG_RW | CTLFLAG_STATS, &sc->sysctl_data.data_bio_cnt, 1015 "# of bio data block"); 1016 SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "data_vaddr_cnt", 1017 CTLFLAG_RW | CTLFLAG_STATS, &sc->sysctl_data.data_vaddr_cnt, 1018 "# of vaddr data block"); 1019 SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "data_sg_cnt", 1020 CTLFLAG_RW | CTLFLAG_STATS, &sc->sysctl_data.data_sg_cnt, 1021 "# of sg data block"); 1022 1023 /* dev.storvsc.UNIT.channel */ 1024 ch_tree = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "channel", 1025 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, ""); 1026 if (ch_tree == NULL) 1027 return; 1028 1029 for (i = 0; i < sc->hs_nchan; i++) { 1030 uint32_t ch_id; 1031 1032 ch_id = vmbus_chan_id(sc->hs_sel_chan[i]); 1033 snprintf(name, sizeof(name), "%d", ch_id); 1034 /* dev.storvsc.UNIT.channel.CHID */ 1035 chid_tree = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(ch_tree), 1036 OID_AUTO, name, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, ""); 1037 if (chid_tree == NULL) 1038 return; 1039 /* dev.storvsc.UNIT.channel.CHID.send_req */ 1040 SYSCTL_ADD_ULONG(ctx, SYSCTL_CHILDREN(chid_tree), OID_AUTO, 1041 "send_req", CTLFLAG_RD, &sc->sysctl_data.chan_send_cnt[i], 1042 "# of request sending from this channel"); 1043 } 1044 } 1045 1046 /** 1047 * @brief StorVSC attach function 1048 * 1049 * Function responsible for allocating per-device structures, 1050 * setting up CAM interfaces and scanning for available LUNs to 1051 * be used for SCSI device peripherals. 1052 * 1053 * @param a device 1054 * @returns 0 on success or an error on failure 1055 */ 1056 static int 1057 storvsc_attach(device_t dev) 1058 { 1059 enum hv_storage_type stor_type; 1060 struct storvsc_softc *sc; 1061 struct cam_devq *devq; 1062 int ret, i, j; 1063 struct hv_storvsc_request *reqp; 1064 struct root_hold_token *root_mount_token = NULL; 1065 struct hv_sgl_node *sgl_node = NULL; 1066 void *tmp_buff = NULL; 1067 1068 /* 1069 * We need to serialize storvsc attach calls. 1070 */ 1071 root_mount_token = root_mount_hold("storvsc"); 1072 1073 sc = device_get_softc(dev); 1074 sc->hs_nchan = 1; 1075 sc->hs_chan = vmbus_get_channel(dev); 1076 1077 stor_type = storvsc_get_storage_type(dev); 1078 1079 if (stor_type == DRIVER_UNKNOWN) { 1080 ret = ENODEV; 1081 goto cleanup; 1082 } 1083 1084 /* fill in driver specific properties */ 1085 sc->hs_drv_props = &g_drv_props_table[stor_type]; 1086 sc->hs_drv_props->drv_ringbuffer_size = hv_storvsc_ringbuffer_size; 1087 sc->hs_drv_props->drv_max_ios_per_target = 1088 MIN(STORVSC_MAX_IO, hv_storvsc_max_io); 1089 if (bootverbose) { 1090 printf("storvsc ringbuffer size: %d, max_io: %d\n", 1091 sc->hs_drv_props->drv_ringbuffer_size, 1092 sc->hs_drv_props->drv_max_ios_per_target); 1093 } 1094 /* fill in device specific properties */ 1095 sc->hs_unit = device_get_unit(dev); 1096 sc->hs_dev = dev; 1097 1098 mtx_init(&sc->hs_lock, "hvslck", NULL, MTX_DEF); 1099 1100 ret = storvsc_init_requests(dev); 1101 if (ret != 0) 1102 goto cleanup; 1103 1104 /* create sg-list page pool */ 1105 if (FALSE == g_hv_sgl_page_pool.is_init) { 1106 g_hv_sgl_page_pool.is_init = TRUE; 1107 LIST_INIT(&g_hv_sgl_page_pool.in_use_sgl_list); 1108 LIST_INIT(&g_hv_sgl_page_pool.free_sgl_list); 1109 1110 /* 1111 * Pre-create SG list, each SG list with 1112 * STORVSC_DATA_SEGCNT_MAX segments, each 1113 * segment has one page buffer 1114 */ 1115 for (i = 0; i < sc->hs_drv_props->drv_max_ios_per_target; i++) { 1116 sgl_node = malloc(sizeof(struct hv_sgl_node), 1117 M_DEVBUF, M_WAITOK|M_ZERO); 1118 1119 sgl_node->sgl_data = malloc(sizeof(struct hv_sglist), 1120 M_DEVBUF, M_WAITOK|M_ZERO); 1121 1122 for (j = 0; j < STORVSC_DATA_SEGCNT_MAX; j++) { 1123 tmp_buff = malloc(PAGE_SIZE, 1124 M_DEVBUF, M_WAITOK|M_ZERO); 1125 1126 sgl_node->sgl_data->sg_iov[j].iov_base = 1127 tmp_buff; 1128 } 1129 1130 LIST_INSERT_HEAD(&g_hv_sgl_page_pool.free_sgl_list, 1131 sgl_node, link); 1132 } 1133 } 1134 1135 sc->hs_destroy = FALSE; 1136 sc->hs_drain_notify = FALSE; 1137 sema_init(&sc->hs_drain_sema, 0, "Store Drain Sema"); 1138 1139 ret = hv_storvsc_connect_vsp(sc); 1140 if (ret != 0) { 1141 goto cleanup; 1142 } 1143 1144 /* Construct cpu to channel mapping */ 1145 storvsc_create_chan_sel(sc); 1146 1147 /* 1148 * Create the device queue. 1149 * Hyper-V maps each target to one SCSI HBA 1150 */ 1151 devq = cam_simq_alloc(sc->hs_drv_props->drv_max_ios_per_target); 1152 if (devq == NULL) { 1153 device_printf(dev, "Failed to alloc device queue\n"); 1154 ret = ENOMEM; 1155 goto cleanup; 1156 } 1157 1158 sc->hs_sim = cam_sim_alloc(storvsc_action, 1159 storvsc_poll, 1160 sc->hs_drv_props->drv_name, 1161 sc, 1162 sc->hs_unit, 1163 &sc->hs_lock, 1, 1164 sc->hs_drv_props->drv_max_ios_per_target, 1165 devq); 1166 1167 if (sc->hs_sim == NULL) { 1168 device_printf(dev, "Failed to alloc sim\n"); 1169 cam_simq_free(devq); 1170 ret = ENOMEM; 1171 goto cleanup; 1172 } 1173 1174 mtx_lock(&sc->hs_lock); 1175 /* bus_id is set to 0, need to get it from VMBUS channel query? */ 1176 if (xpt_bus_register(sc->hs_sim, dev, 0) != CAM_SUCCESS) { 1177 cam_sim_free(sc->hs_sim, /*free_devq*/TRUE); 1178 mtx_unlock(&sc->hs_lock); 1179 device_printf(dev, "Unable to register SCSI bus\n"); 1180 ret = ENXIO; 1181 goto cleanup; 1182 } 1183 1184 if (xpt_create_path(&sc->hs_path, /*periph*/NULL, 1185 cam_sim_path(sc->hs_sim), 1186 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 1187 xpt_bus_deregister(cam_sim_path(sc->hs_sim)); 1188 cam_sim_free(sc->hs_sim, /*free_devq*/TRUE); 1189 mtx_unlock(&sc->hs_lock); 1190 device_printf(dev, "Unable to create path\n"); 1191 ret = ENXIO; 1192 goto cleanup; 1193 } 1194 1195 mtx_unlock(&sc->hs_lock); 1196 1197 storvsc_sysctl(dev); 1198 1199 root_mount_rel(root_mount_token); 1200 return (0); 1201 1202 1203 cleanup: 1204 root_mount_rel(root_mount_token); 1205 while (!LIST_EMPTY(&sc->hs_free_list)) { 1206 reqp = LIST_FIRST(&sc->hs_free_list); 1207 LIST_REMOVE(reqp, link); 1208 bus_dmamap_destroy(sc->storvsc_req_dtag, reqp->data_dmap); 1209 free(reqp, M_DEVBUF); 1210 } 1211 1212 while (!LIST_EMPTY(&g_hv_sgl_page_pool.free_sgl_list)) { 1213 sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.free_sgl_list); 1214 LIST_REMOVE(sgl_node, link); 1215 for (j = 0; j < STORVSC_DATA_SEGCNT_MAX; j++) { 1216 free(sgl_node->sgl_data->sg_iov[j].iov_base, M_DEVBUF); 1217 } 1218 free(sgl_node->sgl_data, M_DEVBUF); 1219 free(sgl_node, M_DEVBUF); 1220 } 1221 1222 return (ret); 1223 } 1224 1225 /** 1226 * @brief StorVSC device detach function 1227 * 1228 * This function is responsible for safely detaching a 1229 * StorVSC device. This includes waiting for inbound responses 1230 * to complete and freeing associated per-device structures. 1231 * 1232 * @param dev a device 1233 * returns 0 on success 1234 */ 1235 static int 1236 storvsc_detach(device_t dev) 1237 { 1238 struct storvsc_softc *sc = device_get_softc(dev); 1239 struct hv_storvsc_request *reqp = NULL; 1240 struct hv_sgl_node *sgl_node = NULL; 1241 int j = 0; 1242 1243 sc->hs_destroy = TRUE; 1244 1245 /* 1246 * At this point, all outbound traffic should be disabled. We 1247 * only allow inbound traffic (responses) to proceed so that 1248 * outstanding requests can be completed. 1249 */ 1250 1251 sc->hs_drain_notify = TRUE; 1252 sema_wait(&sc->hs_drain_sema); 1253 sc->hs_drain_notify = FALSE; 1254 1255 /* 1256 * Since we have already drained, we don't need to busy wait. 1257 * The call to close the channel will reset the callback 1258 * under the protection of the incoming channel lock. 1259 */ 1260 1261 vmbus_chan_close(sc->hs_chan); 1262 1263 mtx_lock(&sc->hs_lock); 1264 while (!LIST_EMPTY(&sc->hs_free_list)) { 1265 reqp = LIST_FIRST(&sc->hs_free_list); 1266 LIST_REMOVE(reqp, link); 1267 bus_dmamap_destroy(sc->storvsc_req_dtag, reqp->data_dmap); 1268 free(reqp, M_DEVBUF); 1269 } 1270 mtx_unlock(&sc->hs_lock); 1271 1272 while (!LIST_EMPTY(&g_hv_sgl_page_pool.free_sgl_list)) { 1273 sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.free_sgl_list); 1274 LIST_REMOVE(sgl_node, link); 1275 for (j = 0; j < STORVSC_DATA_SEGCNT_MAX; j++){ 1276 free(sgl_node->sgl_data->sg_iov[j].iov_base, M_DEVBUF); 1277 } 1278 free(sgl_node->sgl_data, M_DEVBUF); 1279 free(sgl_node, M_DEVBUF); 1280 } 1281 1282 return (0); 1283 } 1284 1285 #if HVS_TIMEOUT_TEST 1286 /** 1287 * @brief unit test for timed out operations 1288 * 1289 * This function provides unit testing capability to simulate 1290 * timed out operations. Recompilation with HV_TIMEOUT_TEST=1 1291 * is required. 1292 * 1293 * @param reqp pointer to a request structure 1294 * @param opcode SCSI operation being performed 1295 * @param wait if 1, wait for I/O to complete 1296 */ 1297 static void 1298 storvsc_timeout_test(struct hv_storvsc_request *reqp, 1299 uint8_t opcode, int wait) 1300 { 1301 int ret; 1302 union ccb *ccb = reqp->ccb; 1303 struct storvsc_softc *sc = reqp->softc; 1304 1305 if (reqp->vstor_packet.vm_srb.cdb[0] != opcode) { 1306 return; 1307 } 1308 1309 if (wait) { 1310 mtx_lock(&reqp->event.mtx); 1311 } 1312 ret = hv_storvsc_io_request(sc, reqp); 1313 if (ret != 0) { 1314 if (wait) { 1315 mtx_unlock(&reqp->event.mtx); 1316 } 1317 printf("%s: io_request failed with %d.\n", 1318 __func__, ret); 1319 ccb->ccb_h.status = CAM_PROVIDE_FAIL; 1320 mtx_lock(&sc->hs_lock); 1321 storvsc_free_request(sc, reqp); 1322 xpt_done(ccb); 1323 mtx_unlock(&sc->hs_lock); 1324 return; 1325 } 1326 1327 if (wait) { 1328 xpt_print(ccb->ccb_h.path, 1329 "%u: %s: waiting for IO return.\n", 1330 ticks, __func__); 1331 ret = cv_timedwait(&reqp->event.cv, &reqp->event.mtx, 60*hz); 1332 mtx_unlock(&reqp->event.mtx); 1333 xpt_print(ccb->ccb_h.path, "%u: %s: %s.\n", 1334 ticks, __func__, (ret == 0)? 1335 "IO return detected" : 1336 "IO return not detected"); 1337 /* 1338 * Now both the timer handler and io done are running 1339 * simultaneously. We want to confirm the io done always 1340 * finishes after the timer handler exits. So reqp used by 1341 * timer handler is not freed or stale. Do busy loop for 1342 * another 1/10 second to make sure io done does 1343 * wait for the timer handler to complete. 1344 */ 1345 DELAY(100*1000); 1346 mtx_lock(&sc->hs_lock); 1347 xpt_print(ccb->ccb_h.path, 1348 "%u: %s: finishing, queue frozen %d, " 1349 "ccb status 0x%x scsi_status 0x%x.\n", 1350 ticks, __func__, sc->hs_frozen, 1351 ccb->ccb_h.status, 1352 ccb->csio.scsi_status); 1353 mtx_unlock(&sc->hs_lock); 1354 } 1355 } 1356 #endif /* HVS_TIMEOUT_TEST */ 1357 1358 #ifdef notyet 1359 /** 1360 * @brief timeout handler for requests 1361 * 1362 * This function is called as a result of a callout expiring. 1363 * 1364 * @param arg pointer to a request 1365 */ 1366 static void 1367 storvsc_timeout(void *arg) 1368 { 1369 struct hv_storvsc_request *reqp = arg; 1370 struct storvsc_softc *sc = reqp->softc; 1371 union ccb *ccb = reqp->ccb; 1372 1373 if (reqp->retries == 0) { 1374 mtx_lock(&sc->hs_lock); 1375 xpt_print(ccb->ccb_h.path, 1376 "%u: IO timed out (req=0x%p), wait for another %u secs.\n", 1377 ticks, reqp, ccb->ccb_h.timeout / 1000); 1378 cam_error_print(ccb, CAM_ESF_ALL, CAM_EPF_ALL); 1379 mtx_unlock(&sc->hs_lock); 1380 1381 reqp->retries++; 1382 callout_reset_sbt(&reqp->callout, SBT_1MS * ccb->ccb_h.timeout, 1383 0, storvsc_timeout, reqp, 0); 1384 #if HVS_TIMEOUT_TEST 1385 storvsc_timeout_test(reqp, SEND_DIAGNOSTIC, 0); 1386 #endif 1387 return; 1388 } 1389 1390 mtx_lock(&sc->hs_lock); 1391 xpt_print(ccb->ccb_h.path, 1392 "%u: IO (reqp = 0x%p) did not return for %u seconds, %s.\n", 1393 ticks, reqp, ccb->ccb_h.timeout * (reqp->retries+1) / 1000, 1394 (sc->hs_frozen == 0)? 1395 "freezing the queue" : "the queue is already frozen"); 1396 if (sc->hs_frozen == 0) { 1397 sc->hs_frozen = 1; 1398 xpt_freeze_simq(xpt_path_sim(ccb->ccb_h.path), 1); 1399 } 1400 mtx_unlock(&sc->hs_lock); 1401 1402 #if HVS_TIMEOUT_TEST 1403 storvsc_timeout_test(reqp, MODE_SELECT_10, 1); 1404 #endif 1405 } 1406 #endif 1407 1408 /** 1409 * @brief StorVSC device poll function 1410 * 1411 * This function is responsible for servicing requests when 1412 * interrupts are disabled (i.e when we are dumping core.) 1413 * 1414 * @param sim a pointer to a CAM SCSI interface module 1415 */ 1416 static void 1417 storvsc_poll(struct cam_sim *sim) 1418 { 1419 struct storvsc_softc *sc = cam_sim_softc(sim); 1420 1421 mtx_assert(&sc->hs_lock, MA_OWNED); 1422 mtx_unlock(&sc->hs_lock); 1423 hv_storvsc_on_channel_callback(sc->hs_chan, sc); 1424 mtx_lock(&sc->hs_lock); 1425 } 1426 1427 /** 1428 * @brief StorVSC device action function 1429 * 1430 * This function is responsible for handling SCSI operations which 1431 * are passed from the CAM layer. The requests are in the form of 1432 * CAM control blocks which indicate the action being performed. 1433 * Not all actions require converting the request to a VSCSI protocol 1434 * message - these actions can be responded to by this driver. 1435 * Requests which are destined for a backend storage device are converted 1436 * to a VSCSI protocol message and sent on the channel connection associated 1437 * with this device. 1438 * 1439 * @param sim pointer to a CAM SCSI interface module 1440 * @param ccb pointer to a CAM control block 1441 */ 1442 static void 1443 storvsc_action(struct cam_sim *sim, union ccb *ccb) 1444 { 1445 struct storvsc_softc *sc = cam_sim_softc(sim); 1446 int res; 1447 1448 mtx_assert(&sc->hs_lock, MA_OWNED); 1449 switch (ccb->ccb_h.func_code) { 1450 case XPT_PATH_INQ: { 1451 struct ccb_pathinq *cpi = &ccb->cpi; 1452 1453 cpi->version_num = 1; 1454 cpi->hba_inquiry = PI_TAG_ABLE|PI_SDTR_ABLE; 1455 cpi->target_sprt = 0; 1456 cpi->hba_misc = PIM_NOBUSRESET; 1457 if (hv_storvsc_use_pim_unmapped) 1458 cpi->hba_misc |= PIM_UNMAPPED; 1459 cpi->maxio = STORVSC_DATA_SIZE_MAX; 1460 cpi->hba_eng_cnt = 0; 1461 cpi->max_target = STORVSC_MAX_TARGETS; 1462 cpi->max_lun = sc->hs_drv_props->drv_max_luns_per_target; 1463 cpi->initiator_id = cpi->max_target; 1464 cpi->bus_id = cam_sim_bus(sim); 1465 cpi->base_transfer_speed = 300000; 1466 cpi->transport = XPORT_SAS; 1467 cpi->transport_version = 0; 1468 cpi->protocol = PROTO_SCSI; 1469 cpi->protocol_version = SCSI_REV_SPC2; 1470 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 1471 strlcpy(cpi->hba_vid, sc->hs_drv_props->drv_name, HBA_IDLEN); 1472 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 1473 cpi->unit_number = cam_sim_unit(sim); 1474 1475 ccb->ccb_h.status = CAM_REQ_CMP; 1476 xpt_done(ccb); 1477 return; 1478 } 1479 case XPT_GET_TRAN_SETTINGS: { 1480 struct ccb_trans_settings *cts = &ccb->cts; 1481 1482 cts->transport = XPORT_SAS; 1483 cts->transport_version = 0; 1484 cts->protocol = PROTO_SCSI; 1485 cts->protocol_version = SCSI_REV_SPC2; 1486 1487 /* enable tag queuing and disconnected mode */ 1488 cts->proto_specific.valid = CTS_SCSI_VALID_TQ; 1489 cts->proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; 1490 cts->proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; 1491 cts->xport_specific.valid = CTS_SPI_VALID_DISC; 1492 cts->xport_specific.spi.flags = CTS_SPI_FLAGS_DISC_ENB; 1493 1494 ccb->ccb_h.status = CAM_REQ_CMP; 1495 xpt_done(ccb); 1496 return; 1497 } 1498 case XPT_SET_TRAN_SETTINGS: { 1499 ccb->ccb_h.status = CAM_REQ_CMP; 1500 xpt_done(ccb); 1501 return; 1502 } 1503 case XPT_CALC_GEOMETRY:{ 1504 cam_calc_geometry(&ccb->ccg, 1); 1505 xpt_done(ccb); 1506 return; 1507 } 1508 case XPT_RESET_BUS: 1509 case XPT_RESET_DEV:{ 1510 #if HVS_HOST_RESET 1511 if ((res = hv_storvsc_host_reset(sc)) != 0) { 1512 xpt_print(ccb->ccb_h.path, 1513 "hv_storvsc_host_reset failed with %d\n", res); 1514 ccb->ccb_h.status = CAM_PROVIDE_FAIL; 1515 xpt_done(ccb); 1516 return; 1517 } 1518 ccb->ccb_h.status = CAM_REQ_CMP; 1519 xpt_done(ccb); 1520 return; 1521 #else 1522 xpt_print(ccb->ccb_h.path, 1523 "%s reset not supported.\n", 1524 (ccb->ccb_h.func_code == XPT_RESET_BUS)? 1525 "bus" : "dev"); 1526 ccb->ccb_h.status = CAM_REQ_INVALID; 1527 xpt_done(ccb); 1528 return; 1529 #endif /* HVS_HOST_RESET */ 1530 } 1531 case XPT_SCSI_IO: 1532 case XPT_IMMED_NOTIFY: { 1533 struct hv_storvsc_request *reqp = NULL; 1534 bus_dmamap_t dmap_saved; 1535 1536 if (ccb->csio.cdb_len == 0) { 1537 panic("cdl_len is 0\n"); 1538 } 1539 1540 if (LIST_EMPTY(&sc->hs_free_list)) { 1541 ccb->ccb_h.status = CAM_REQUEUE_REQ; 1542 if (sc->hs_frozen == 0) { 1543 sc->hs_frozen = 1; 1544 xpt_freeze_simq(sim, /* count*/1); 1545 } 1546 xpt_done(ccb); 1547 return; 1548 } 1549 1550 reqp = LIST_FIRST(&sc->hs_free_list); 1551 LIST_REMOVE(reqp, link); 1552 1553 /* Save the data_dmap before reset request */ 1554 dmap_saved = reqp->data_dmap; 1555 1556 /* XXX this is ugly */ 1557 bzero(reqp, sizeof(struct hv_storvsc_request)); 1558 1559 /* Restore necessary bits */ 1560 reqp->data_dmap = dmap_saved; 1561 reqp->softc = sc; 1562 1563 ccb->ccb_h.status |= CAM_SIM_QUEUED; 1564 if ((res = create_storvsc_request(ccb, reqp)) != 0) { 1565 ccb->ccb_h.status = CAM_REQ_INVALID; 1566 xpt_done(ccb); 1567 return; 1568 } 1569 1570 #ifdef notyet 1571 if (ccb->ccb_h.timeout != CAM_TIME_INFINITY) { 1572 callout_init(&reqp->callout, 1); 1573 callout_reset_sbt(&reqp->callout, 1574 SBT_1MS * ccb->ccb_h.timeout, 0, 1575 storvsc_timeout, reqp, 0); 1576 #if HVS_TIMEOUT_TEST 1577 cv_init(&reqp->event.cv, "storvsc timeout cv"); 1578 mtx_init(&reqp->event.mtx, "storvsc timeout mutex", 1579 NULL, MTX_DEF); 1580 switch (reqp->vstor_packet.vm_srb.cdb[0]) { 1581 case MODE_SELECT_10: 1582 case SEND_DIAGNOSTIC: 1583 /* To have timer send the request. */ 1584 return; 1585 default: 1586 break; 1587 } 1588 #endif /* HVS_TIMEOUT_TEST */ 1589 } 1590 #endif 1591 1592 if ((res = hv_storvsc_io_request(sc, reqp)) != 0) { 1593 xpt_print(ccb->ccb_h.path, 1594 "hv_storvsc_io_request failed with %d\n", res); 1595 ccb->ccb_h.status = CAM_PROVIDE_FAIL; 1596 storvsc_free_request(sc, reqp); 1597 xpt_done(ccb); 1598 return; 1599 } 1600 return; 1601 } 1602 1603 default: 1604 ccb->ccb_h.status = CAM_REQ_INVALID; 1605 xpt_done(ccb); 1606 return; 1607 } 1608 } 1609 1610 /** 1611 * @brief destroy bounce buffer 1612 * 1613 * This function is responsible for destroy a Scatter/Gather list 1614 * that create by storvsc_create_bounce_buffer() 1615 * 1616 * @param sgl- the Scatter/Gather need be destroy 1617 * @param sg_count- page count of the SG list. 1618 * 1619 */ 1620 static void 1621 storvsc_destroy_bounce_buffer(struct hv_sglist *sgl) 1622 { 1623 struct hv_sgl_node *sgl_node = NULL; 1624 if (LIST_EMPTY(&g_hv_sgl_page_pool.in_use_sgl_list)) { 1625 printf("storvsc error: not enough in use sgl\n"); 1626 return; 1627 } 1628 sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.in_use_sgl_list); 1629 LIST_REMOVE(sgl_node, link); 1630 sgl_node->sgl_data = sgl; 1631 LIST_INSERT_HEAD(&g_hv_sgl_page_pool.free_sgl_list, sgl_node, link); 1632 } 1633 1634 /** 1635 * @brief create bounce buffer 1636 * 1637 * This function is responsible for create a Scatter/Gather list, 1638 * which hold several pages that can be aligned with page size. 1639 * 1640 * @param seg_count- SG-list segments count 1641 * @param write - if WRITE_TYPE, set SG list page used size to 0, 1642 * otherwise set used size to page size. 1643 * 1644 * return NULL if create failed 1645 */ 1646 static struct hv_sglist * 1647 storvsc_create_bounce_buffer(uint16_t seg_count, int write) 1648 { 1649 int i = 0; 1650 struct hv_sglist *bounce_sgl = NULL; 1651 unsigned int buf_len = ((write == WRITE_TYPE) ? 0 : PAGE_SIZE); 1652 struct hv_sgl_node *sgl_node = NULL; 1653 1654 /* get struct hv_sglist from free_sgl_list */ 1655 if (LIST_EMPTY(&g_hv_sgl_page_pool.free_sgl_list)) { 1656 printf("storvsc error: not enough free sgl\n"); 1657 return NULL; 1658 } 1659 sgl_node = LIST_FIRST(&g_hv_sgl_page_pool.free_sgl_list); 1660 LIST_REMOVE(sgl_node, link); 1661 bounce_sgl = sgl_node->sgl_data; 1662 LIST_INSERT_HEAD(&g_hv_sgl_page_pool.in_use_sgl_list, sgl_node, link); 1663 1664 bounce_sgl->sg_maxseg = seg_count; 1665 1666 if (write == WRITE_TYPE) 1667 bounce_sgl->sg_nseg = 0; 1668 else 1669 bounce_sgl->sg_nseg = seg_count; 1670 1671 for (i = 0; i < seg_count; i++) 1672 bounce_sgl->sg_iov[i].iov_len = buf_len; 1673 1674 return bounce_sgl; 1675 } 1676 1677 /** 1678 * @brief copy data from SG list to bounce buffer 1679 * 1680 * This function is responsible for copy data from one SG list's segments 1681 * to another SG list which used as bounce buffer. 1682 * 1683 * @param bounce_sgl - the destination SG list 1684 * @param orig_sgl - the segment of the source SG list. 1685 * @param orig_sgl_count - the count of segments. 1686 * @param orig_sgl_count - indicate which segment need bounce buffer, 1687 * set 1 means need. 1688 * 1689 */ 1690 static void 1691 storvsc_copy_sgl_to_bounce_buf(struct hv_sglist *bounce_sgl, 1692 bus_dma_segment_t *orig_sgl, 1693 unsigned int orig_sgl_count, 1694 uint64_t seg_bits) 1695 { 1696 int src_sgl_idx = 0; 1697 1698 for (src_sgl_idx = 0; src_sgl_idx < orig_sgl_count; src_sgl_idx++) { 1699 if (seg_bits & (1 << src_sgl_idx)) { 1700 memcpy(bounce_sgl->sg_iov[src_sgl_idx].iov_base, 1701 (void*)orig_sgl[src_sgl_idx].ds_addr, 1702 orig_sgl[src_sgl_idx].ds_len); 1703 1704 bounce_sgl->sg_iov[src_sgl_idx].iov_len = 1705 orig_sgl[src_sgl_idx].ds_len; 1706 } 1707 } 1708 } 1709 1710 /** 1711 * @brief copy data from SG list which used as bounce to another SG list 1712 * 1713 * This function is responsible for copy data from one SG list with bounce 1714 * buffer to another SG list's segments. 1715 * 1716 * @param dest_sgl - the destination SG list's segments 1717 * @param dest_sgl_count - the count of destination SG list's segment. 1718 * @param src_sgl - the source SG list. 1719 * @param seg_bits - indicate which segment used bounce buffer of src SG-list. 1720 * 1721 */ 1722 void 1723 storvsc_copy_from_bounce_buf_to_sgl(bus_dma_segment_t *dest_sgl, 1724 unsigned int dest_sgl_count, 1725 struct hv_sglist* src_sgl, 1726 uint64_t seg_bits) 1727 { 1728 int sgl_idx = 0; 1729 1730 for (sgl_idx = 0; sgl_idx < dest_sgl_count; sgl_idx++) { 1731 if (seg_bits & (1 << sgl_idx)) { 1732 memcpy((void*)(dest_sgl[sgl_idx].ds_addr), 1733 src_sgl->sg_iov[sgl_idx].iov_base, 1734 src_sgl->sg_iov[sgl_idx].iov_len); 1735 } 1736 } 1737 } 1738 1739 /** 1740 * @brief check SG list with bounce buffer or not 1741 * 1742 * This function is responsible for check if need bounce buffer for SG list. 1743 * 1744 * @param sgl - the SG list's segments 1745 * @param sg_count - the count of SG list's segment. 1746 * @param bits - segmengs number that need bounce buffer 1747 * 1748 * return -1 if SG list needless bounce buffer 1749 */ 1750 static int 1751 storvsc_check_bounce_buffer_sgl(bus_dma_segment_t *sgl, 1752 unsigned int sg_count, 1753 uint64_t *bits) 1754 { 1755 int i = 0; 1756 int offset = 0; 1757 uint64_t phys_addr = 0; 1758 uint64_t tmp_bits = 0; 1759 boolean_t found_hole = FALSE; 1760 boolean_t pre_aligned = TRUE; 1761 1762 if (sg_count < 2){ 1763 return -1; 1764 } 1765 1766 *bits = 0; 1767 1768 phys_addr = vtophys(sgl[0].ds_addr); 1769 offset = phys_addr - trunc_page(phys_addr); 1770 1771 if (offset != 0) { 1772 pre_aligned = FALSE; 1773 tmp_bits |= 1; 1774 } 1775 1776 for (i = 1; i < sg_count; i++) { 1777 phys_addr = vtophys(sgl[i].ds_addr); 1778 offset = phys_addr - trunc_page(phys_addr); 1779 1780 if (offset == 0) { 1781 if (FALSE == pre_aligned){ 1782 /* 1783 * This segment is aligned, if the previous 1784 * one is not aligned, find a hole 1785 */ 1786 found_hole = TRUE; 1787 } 1788 pre_aligned = TRUE; 1789 } else { 1790 tmp_bits |= 1ULL << i; 1791 if (!pre_aligned) { 1792 if (phys_addr != vtophys(sgl[i-1].ds_addr + 1793 sgl[i-1].ds_len)) { 1794 /* 1795 * Check whether connect to previous 1796 * segment,if not, find the hole 1797 */ 1798 found_hole = TRUE; 1799 } 1800 } else { 1801 found_hole = TRUE; 1802 } 1803 pre_aligned = FALSE; 1804 } 1805 } 1806 1807 if (!found_hole) { 1808 return (-1); 1809 } else { 1810 *bits = tmp_bits; 1811 return 0; 1812 } 1813 } 1814 1815 /** 1816 * Copy bus_dma segments to multiple page buffer, which requires 1817 * the pages are compact composed except for the 1st and last pages. 1818 */ 1819 static void 1820 storvsc_xferbuf_prepare(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 1821 { 1822 struct hv_storvsc_request *reqp = arg; 1823 union ccb *ccb = reqp->ccb; 1824 struct ccb_scsiio *csio = &ccb->csio; 1825 struct storvsc_gpa_range *prplist; 1826 int i; 1827 1828 prplist = &reqp->prp_list; 1829 prplist->gpa_range.gpa_len = csio->dxfer_len; 1830 prplist->gpa_range.gpa_ofs = segs[0].ds_addr & PAGE_MASK; 1831 1832 for (i = 0; i < nsegs; i++) { 1833 #ifdef INVARIANTS 1834 if (nsegs > 1) { 1835 if (i == 0) { 1836 KASSERT((segs[i].ds_addr & PAGE_MASK) + 1837 segs[i].ds_len == PAGE_SIZE, 1838 ("invalid 1st page, ofs 0x%jx, len %zu", 1839 (uintmax_t)segs[i].ds_addr, 1840 segs[i].ds_len)); 1841 } else if (i == nsegs - 1) { 1842 KASSERT((segs[i].ds_addr & PAGE_MASK) == 0, 1843 ("invalid last page, ofs 0x%jx", 1844 (uintmax_t)segs[i].ds_addr)); 1845 } else { 1846 KASSERT((segs[i].ds_addr & PAGE_MASK) == 0 && 1847 segs[i].ds_len == PAGE_SIZE, 1848 ("not a full page, ofs 0x%jx, len %zu", 1849 (uintmax_t)segs[i].ds_addr, 1850 segs[i].ds_len)); 1851 } 1852 } 1853 #endif 1854 prplist->gpa_page[i] = atop(segs[i].ds_addr); 1855 } 1856 reqp->prp_cnt = nsegs; 1857 } 1858 1859 /** 1860 * @brief Fill in a request structure based on a CAM control block 1861 * 1862 * Fills in a request structure based on the contents of a CAM control 1863 * block. The request structure holds the payload information for 1864 * VSCSI protocol request. 1865 * 1866 * @param ccb pointer to a CAM contorl block 1867 * @param reqp pointer to a request structure 1868 */ 1869 static int 1870 create_storvsc_request(union ccb *ccb, struct hv_storvsc_request *reqp) 1871 { 1872 struct ccb_scsiio *csio = &ccb->csio; 1873 uint64_t phys_addr; 1874 uint32_t pfn; 1875 uint64_t not_aligned_seg_bits = 0; 1876 int error; 1877 1878 /* refer to struct vmscsi_req for meanings of these two fields */ 1879 reqp->vstor_packet.u.vm_srb.port = 1880 cam_sim_unit(xpt_path_sim(ccb->ccb_h.path)); 1881 reqp->vstor_packet.u.vm_srb.path_id = 1882 cam_sim_bus(xpt_path_sim(ccb->ccb_h.path)); 1883 1884 reqp->vstor_packet.u.vm_srb.target_id = ccb->ccb_h.target_id; 1885 reqp->vstor_packet.u.vm_srb.lun = ccb->ccb_h.target_lun; 1886 1887 reqp->vstor_packet.u.vm_srb.cdb_len = csio->cdb_len; 1888 if(ccb->ccb_h.flags & CAM_CDB_POINTER) { 1889 memcpy(&reqp->vstor_packet.u.vm_srb.u.cdb, csio->cdb_io.cdb_ptr, 1890 csio->cdb_len); 1891 } else { 1892 memcpy(&reqp->vstor_packet.u.vm_srb.u.cdb, csio->cdb_io.cdb_bytes, 1893 csio->cdb_len); 1894 } 1895 1896 if (hv_storvsc_use_win8ext_flags) { 1897 reqp->vstor_packet.u.vm_srb.win8_extension.time_out_value = 60; 1898 reqp->vstor_packet.u.vm_srb.win8_extension.srb_flags |= 1899 SRB_FLAGS_DISABLE_SYNCH_TRANSFER; 1900 } 1901 switch (ccb->ccb_h.flags & CAM_DIR_MASK) { 1902 case CAM_DIR_OUT: 1903 reqp->vstor_packet.u.vm_srb.data_in = WRITE_TYPE; 1904 if (hv_storvsc_use_win8ext_flags) { 1905 reqp->vstor_packet.u.vm_srb.win8_extension.srb_flags |= 1906 SRB_FLAGS_DATA_OUT; 1907 } 1908 break; 1909 case CAM_DIR_IN: 1910 reqp->vstor_packet.u.vm_srb.data_in = READ_TYPE; 1911 if (hv_storvsc_use_win8ext_flags) { 1912 reqp->vstor_packet.u.vm_srb.win8_extension.srb_flags |= 1913 SRB_FLAGS_DATA_IN; 1914 } 1915 break; 1916 case CAM_DIR_NONE: 1917 reqp->vstor_packet.u.vm_srb.data_in = UNKNOWN_TYPE; 1918 if (hv_storvsc_use_win8ext_flags) { 1919 reqp->vstor_packet.u.vm_srb.win8_extension.srb_flags |= 1920 SRB_FLAGS_NO_DATA_TRANSFER; 1921 } 1922 break; 1923 default: 1924 printf("Error: unexpected data direction: 0x%x\n", 1925 ccb->ccb_h.flags & CAM_DIR_MASK); 1926 return (EINVAL); 1927 } 1928 1929 reqp->sense_data = &csio->sense_data; 1930 reqp->sense_info_len = csio->sense_len; 1931 1932 reqp->ccb = ccb; 1933 ccb->ccb_h.spriv_ptr0 = reqp; 1934 1935 if (0 == csio->dxfer_len) { 1936 return (0); 1937 } 1938 1939 switch (ccb->ccb_h.flags & CAM_DATA_MASK) { 1940 case CAM_DATA_BIO: 1941 case CAM_DATA_VADDR: 1942 error = bus_dmamap_load_ccb(reqp->softc->storvsc_req_dtag, 1943 reqp->data_dmap, ccb, storvsc_xferbuf_prepare, reqp, 1944 BUS_DMA_NOWAIT); 1945 if (error) { 1946 xpt_print(ccb->ccb_h.path, 1947 "bus_dmamap_load_ccb failed: %d\n", error); 1948 return (error); 1949 } 1950 if ((ccb->ccb_h.flags & CAM_DATA_MASK) == CAM_DATA_BIO) 1951 reqp->softc->sysctl_data.data_bio_cnt++; 1952 else 1953 reqp->softc->sysctl_data.data_vaddr_cnt++; 1954 break; 1955 1956 case CAM_DATA_SG: 1957 { 1958 struct storvsc_gpa_range *prplist; 1959 int i = 0; 1960 int offset = 0; 1961 int ret; 1962 1963 bus_dma_segment_t *storvsc_sglist = 1964 (bus_dma_segment_t *)ccb->csio.data_ptr; 1965 u_int16_t storvsc_sg_count = ccb->csio.sglist_cnt; 1966 1967 prplist = &reqp->prp_list; 1968 prplist->gpa_range.gpa_len = csio->dxfer_len; 1969 1970 printf("Storvsc: get SG I/O operation, %d\n", 1971 reqp->vstor_packet.u.vm_srb.data_in); 1972 1973 if (storvsc_sg_count > STORVSC_DATA_SEGCNT_MAX){ 1974 printf("Storvsc: %d segments is too much, " 1975 "only support %d segments\n", 1976 storvsc_sg_count, STORVSC_DATA_SEGCNT_MAX); 1977 return (EINVAL); 1978 } 1979 1980 /* 1981 * We create our own bounce buffer function currently. Idealy 1982 * we should use BUS_DMA(9) framework. But with current BUS_DMA 1983 * code there is no callback API to check the page alignment of 1984 * middle segments before busdma can decide if a bounce buffer 1985 * is needed for particular segment. There is callback, 1986 * "bus_dma_filter_t *filter", but the parrameters are not 1987 * sufficient for storvsc driver. 1988 * TODO: 1989 * Add page alignment check in BUS_DMA(9) callback. Once 1990 * this is complete, switch the following code to use 1991 * BUS_DMA(9) for storvsc bounce buffer support. 1992 */ 1993 /* check if we need to create bounce buffer */ 1994 ret = storvsc_check_bounce_buffer_sgl(storvsc_sglist, 1995 storvsc_sg_count, ¬_aligned_seg_bits); 1996 if (ret != -1) { 1997 reqp->bounce_sgl = 1998 storvsc_create_bounce_buffer(storvsc_sg_count, 1999 reqp->vstor_packet.u.vm_srb.data_in); 2000 if (NULL == reqp->bounce_sgl) { 2001 printf("Storvsc_error: " 2002 "create bounce buffer failed.\n"); 2003 return (ENOMEM); 2004 } 2005 2006 reqp->bounce_sgl_count = storvsc_sg_count; 2007 reqp->not_aligned_seg_bits = not_aligned_seg_bits; 2008 2009 /* 2010 * if it is write, we need copy the original data 2011 *to bounce buffer 2012 */ 2013 if (WRITE_TYPE == reqp->vstor_packet.u.vm_srb.data_in) { 2014 storvsc_copy_sgl_to_bounce_buf( 2015 reqp->bounce_sgl, 2016 storvsc_sglist, 2017 storvsc_sg_count, 2018 reqp->not_aligned_seg_bits); 2019 } 2020 2021 /* transfer virtual address to physical frame number */ 2022 if (reqp->not_aligned_seg_bits & 0x1){ 2023 phys_addr = 2024 vtophys(reqp->bounce_sgl->sg_iov[0].iov_base); 2025 }else{ 2026 phys_addr = 2027 vtophys(storvsc_sglist[0].ds_addr); 2028 } 2029 prplist->gpa_range.gpa_ofs = phys_addr & PAGE_MASK; 2030 2031 pfn = phys_addr >> PAGE_SHIFT; 2032 prplist->gpa_page[0] = pfn; 2033 2034 for (i = 1; i < storvsc_sg_count; i++) { 2035 if (reqp->not_aligned_seg_bits & (1 << i)) { 2036 phys_addr = 2037 vtophys(reqp->bounce_sgl->sg_iov[i].iov_base); 2038 } else { 2039 phys_addr = 2040 vtophys(storvsc_sglist[i].ds_addr); 2041 } 2042 2043 pfn = phys_addr >> PAGE_SHIFT; 2044 prplist->gpa_page[i] = pfn; 2045 } 2046 reqp->prp_cnt = i; 2047 } else { 2048 phys_addr = vtophys(storvsc_sglist[0].ds_addr); 2049 2050 prplist->gpa_range.gpa_ofs = phys_addr & PAGE_MASK; 2051 2052 for (i = 0; i < storvsc_sg_count; i++) { 2053 phys_addr = vtophys(storvsc_sglist[i].ds_addr); 2054 pfn = phys_addr >> PAGE_SHIFT; 2055 prplist->gpa_page[i] = pfn; 2056 } 2057 reqp->prp_cnt = i; 2058 2059 /* check the last segment cross boundary or not */ 2060 offset = phys_addr & PAGE_MASK; 2061 if (offset) { 2062 /* Add one more PRP entry */ 2063 phys_addr = 2064 vtophys(storvsc_sglist[i-1].ds_addr + 2065 PAGE_SIZE - offset); 2066 pfn = phys_addr >> PAGE_SHIFT; 2067 prplist->gpa_page[i] = pfn; 2068 reqp->prp_cnt++; 2069 } 2070 2071 reqp->bounce_sgl_count = 0; 2072 } 2073 reqp->softc->sysctl_data.data_sg_cnt++; 2074 break; 2075 } 2076 default: 2077 printf("Unknow flags: %d\n", ccb->ccb_h.flags); 2078 return(EINVAL); 2079 } 2080 2081 return(0); 2082 } 2083 2084 static uint32_t 2085 is_scsi_valid(const struct scsi_inquiry_data *inq_data) 2086 { 2087 u_int8_t type; 2088 2089 type = SID_TYPE(inq_data); 2090 if (type == T_NODEVICE) 2091 return (0); 2092 if (SID_QUAL(inq_data) == SID_QUAL_BAD_LU) 2093 return (0); 2094 return (1); 2095 } 2096 2097 /** 2098 * @brief completion function before returning to CAM 2099 * 2100 * I/O process has been completed and the result needs 2101 * to be passed to the CAM layer. 2102 * Free resources related to this request. 2103 * 2104 * @param reqp pointer to a request structure 2105 */ 2106 static void 2107 storvsc_io_done(struct hv_storvsc_request *reqp) 2108 { 2109 union ccb *ccb = reqp->ccb; 2110 struct ccb_scsiio *csio = &ccb->csio; 2111 struct storvsc_softc *sc = reqp->softc; 2112 struct vmscsi_req *vm_srb = &reqp->vstor_packet.u.vm_srb; 2113 bus_dma_segment_t *ori_sglist = NULL; 2114 int ori_sg_count = 0; 2115 const struct scsi_generic *cmd; 2116 2117 /* destroy bounce buffer if it is used */ 2118 if (reqp->bounce_sgl_count) { 2119 ori_sglist = (bus_dma_segment_t *)ccb->csio.data_ptr; 2120 ori_sg_count = ccb->csio.sglist_cnt; 2121 2122 /* 2123 * If it is READ operation, we should copy back the data 2124 * to original SG list. 2125 */ 2126 if (READ_TYPE == reqp->vstor_packet.u.vm_srb.data_in) { 2127 storvsc_copy_from_bounce_buf_to_sgl(ori_sglist, 2128 ori_sg_count, 2129 reqp->bounce_sgl, 2130 reqp->not_aligned_seg_bits); 2131 } 2132 2133 storvsc_destroy_bounce_buffer(reqp->bounce_sgl); 2134 reqp->bounce_sgl_count = 0; 2135 } 2136 2137 if (reqp->retries > 0) { 2138 mtx_lock(&sc->hs_lock); 2139 #if HVS_TIMEOUT_TEST 2140 xpt_print(ccb->ccb_h.path, 2141 "%u: IO returned after timeout, " 2142 "waking up timer handler if any.\n", ticks); 2143 mtx_lock(&reqp->event.mtx); 2144 cv_signal(&reqp->event.cv); 2145 mtx_unlock(&reqp->event.mtx); 2146 #endif 2147 reqp->retries = 0; 2148 xpt_print(ccb->ccb_h.path, 2149 "%u: IO returned after timeout, " 2150 "stopping timer if any.\n", ticks); 2151 mtx_unlock(&sc->hs_lock); 2152 } 2153 2154 #ifdef notyet 2155 /* 2156 * callout_drain() will wait for the timer handler to finish 2157 * if it is running. So we don't need any lock to synchronize 2158 * between this routine and the timer handler. 2159 * Note that we need to make sure reqp is not freed when timer 2160 * handler is using or will use it. 2161 */ 2162 if (ccb->ccb_h.timeout != CAM_TIME_INFINITY) { 2163 callout_drain(&reqp->callout); 2164 } 2165 #endif 2166 cmd = (const struct scsi_generic *) 2167 ((ccb->ccb_h.flags & CAM_CDB_POINTER) ? 2168 csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes); 2169 2170 ccb->ccb_h.status &= ~CAM_SIM_QUEUED; 2171 ccb->ccb_h.status &= ~CAM_STATUS_MASK; 2172 int srb_status = SRB_STATUS(vm_srb->srb_status); 2173 #ifdef DIAGNOSTIC 2174 if (hv_storvsc_srb_status != -1) { 2175 srb_status = SRB_STATUS(hv_storvsc_srb_status & 0x3f); 2176 hv_storvsc_srb_status = -1; 2177 } 2178 #endif /* DIAGNOSTIC */ 2179 if (vm_srb->scsi_status == SCSI_STATUS_OK) { 2180 if (srb_status != SRB_STATUS_SUCCESS) { 2181 bool log_error = true; 2182 switch (srb_status) { 2183 case SRB_STATUS_PENDING: 2184 /* We should never get this */ 2185 panic("storvsc_io_done: SRB_STATUS_PENDING"); 2186 break; 2187 case SRB_STATUS_ABORTED: 2188 /* 2189 * storvsc doesn't support aborts yet 2190 * but if we ever get this status 2191 * the I/O is complete - treat it as a 2192 * timeout 2193 */ 2194 ccb->ccb_h.status |= CAM_CMD_TIMEOUT; 2195 break; 2196 case SRB_STATUS_ABORT_FAILED: 2197 /* We should never get this */ 2198 panic("storvsc_io_done: SRB_STATUS_ABORT_FAILED"); 2199 break; 2200 case SRB_STATUS_ERROR: 2201 /* 2202 * We should never get this. 2203 * Treat it as a CAM_UNREC_HBA_ERROR. 2204 * It will be retried 2205 */ 2206 ccb->ccb_h.status |= CAM_UNREC_HBA_ERROR; 2207 break; 2208 case SRB_STATUS_BUSY: 2209 /* Host is busy. Delay and retry */ 2210 ccb->ccb_h.status |= CAM_BUSY; 2211 break; 2212 case SRB_STATUS_INVALID_REQUEST: 2213 case SRB_STATUS_INVALID_PATH_ID: 2214 case SRB_STATUS_NO_DEVICE: 2215 case SRB_STATUS_INVALID_TARGET_ID: 2216 /* 2217 * These indicate an invalid address 2218 * and really should never be seen. 2219 * A CAM_PATH_INVALID could be 2220 * used here but I want to run 2221 * down retries. Do a CAM_BUSY 2222 * since the host might be having issues. 2223 */ 2224 ccb->ccb_h.status |= CAM_BUSY; 2225 break; 2226 case SRB_STATUS_TIMEOUT: 2227 case SRB_STATUS_COMMAND_TIMEOUT: 2228 /* The backend has timed this out */ 2229 ccb->ccb_h.status |= CAM_BUSY; 2230 break; 2231 /* Some old pSCSI errors below */ 2232 case SRB_STATUS_SELECTION_TIMEOUT: 2233 case SRB_STATUS_MESSAGE_REJECTED: 2234 case SRB_STATUS_PARITY_ERROR: 2235 case SRB_STATUS_NO_HBA: 2236 case SRB_STATUS_DATA_OVERRUN: 2237 case SRB_STATUS_UNEXPECTED_BUS_FREE: 2238 case SRB_STATUS_PHASE_SEQUENCE_FAILURE: 2239 /* 2240 * Old pSCSI responses, should never get. 2241 * If we do treat as a CAM_UNREC_HBA_ERROR 2242 * which will be retried 2243 */ 2244 ccb->ccb_h.status |= CAM_UNREC_HBA_ERROR; 2245 break; 2246 case SRB_STATUS_BUS_RESET: 2247 ccb->ccb_h.status |= CAM_SCSI_BUS_RESET; 2248 break; 2249 case SRB_STATUS_BAD_SRB_BLOCK_LENGTH: 2250 /* 2251 * The request block is malformed and 2252 * I doubt it is from the guest. Just retry. 2253 */ 2254 ccb->ccb_h.status |= CAM_UNREC_HBA_ERROR; 2255 break; 2256 /* Not used statuses just retry */ 2257 case SRB_STATUS_REQUEST_FLUSHED: 2258 case SRB_STATUS_BAD_FUNCTION: 2259 case SRB_STATUS_NOT_POWERED: 2260 ccb->ccb_h.status |= CAM_UNREC_HBA_ERROR; 2261 break; 2262 case SRB_STATUS_INVALID_LUN: 2263 /* 2264 * Don't log an EMS for this response since 2265 * there is no device at this LUN. This is a 2266 * normal and expected response when a device 2267 * is detached. 2268 */ 2269 ccb->ccb_h.status |= CAM_DEV_NOT_THERE; 2270 log_error = false; 2271 break; 2272 case SRB_STATUS_ERROR_RECOVERY: 2273 case SRB_STATUS_LINK_DOWN: 2274 /* 2275 * I don't ever expect these from 2276 * the host but if we ever get 2277 * retry after a delay 2278 */ 2279 ccb->ccb_h.status |= CAM_BUSY; 2280 break; 2281 default: 2282 /* 2283 * An undefined response assert on 2284 * on debug builds else retry 2285 */ 2286 ccb->ccb_h.status |= CAM_UNREC_HBA_ERROR; 2287 KASSERT(srb_status <= SRB_STATUS_LINK_DOWN, 2288 ("storvsc: %s, unexpected srb_status of 0x%x", 2289 __func__, srb_status)); 2290 break; 2291 } 2292 if (log_error) { 2293 xpt_print(ccb->ccb_h.path, "The hypervisor's I/O adapter " 2294 "driver received an unexpected response code 0x%x " 2295 "for operation: %s. If this continues to occur, " 2296 "report the condition to your hypervisor vendor so " 2297 "they can rectify the issue.\n", srb_status, 2298 scsi_op_desc(cmd->opcode, NULL)); 2299 } 2300 } else { 2301 ccb->ccb_h.status |= CAM_REQ_CMP; 2302 } 2303 2304 if (cmd->opcode == INQUIRY && 2305 srb_status == SRB_STATUS_SUCCESS) { 2306 int resp_xfer_len, resp_buf_len, data_len; 2307 uint8_t *resp_buf = (uint8_t *)csio->data_ptr; 2308 struct scsi_inquiry_data *inq_data = 2309 (struct scsi_inquiry_data *)csio->data_ptr; 2310 2311 /* Get the buffer length reported by host */ 2312 resp_xfer_len = vm_srb->transfer_len; 2313 2314 /* Get the available buffer length */ 2315 resp_buf_len = resp_xfer_len >= 5 ? resp_buf[4] + 5 : 0; 2316 data_len = (resp_buf_len < resp_xfer_len) ? 2317 resp_buf_len : resp_xfer_len; 2318 if (bootverbose && data_len >= 5) { 2319 xpt_print(ccb->ccb_h.path, "storvsc inquiry " 2320 "(%d) [%x %x %x %x %x ... ]\n", data_len, 2321 resp_buf[0], resp_buf[1], resp_buf[2], 2322 resp_buf[3], resp_buf[4]); 2323 } 2324 /* 2325 * XXX: Hyper-V (since win2012r2) responses inquiry with 2326 * unknown version (0) for GEN-2 DVD device. 2327 * Manually set the version number to SPC3 in order to 2328 * ask CAM to continue probing with "PROBE_REPORT_LUNS". 2329 * see probedone() in scsi_xpt.c 2330 */ 2331 if (SID_TYPE(inq_data) == T_CDROM && 2332 inq_data->version == 0 && 2333 (vmstor_proto_version >= VMSTOR_PROTOCOL_VERSION_WIN8)) { 2334 inq_data->version = SCSI_REV_SPC3; 2335 if (bootverbose) { 2336 xpt_print(ccb->ccb_h.path, 2337 "set version from 0 to %d\n", 2338 inq_data->version); 2339 } 2340 } 2341 /* 2342 * XXX: Manually fix the wrong response returned from WS2012 2343 */ 2344 if (!is_scsi_valid(inq_data) && 2345 (vmstor_proto_version == VMSTOR_PROTOCOL_VERSION_WIN8_1 || 2346 vmstor_proto_version == VMSTOR_PROTOCOL_VERSION_WIN8 || 2347 vmstor_proto_version == VMSTOR_PROTOCOL_VERSION_WIN7)) { 2348 if (data_len >= 4 && 2349 (resp_buf[2] == 0 || resp_buf[3] == 0)) { 2350 resp_buf[2] = SCSI_REV_SPC3; 2351 resp_buf[3] = 2; // resp fmt must be 2 2352 if (bootverbose) 2353 xpt_print(ccb->ccb_h.path, 2354 "fix version and resp fmt for 0x%x\n", 2355 vmstor_proto_version); 2356 } 2357 } else if (data_len >= SHORT_INQUIRY_LENGTH) { 2358 char vendor[16]; 2359 2360 cam_strvis(vendor, inq_data->vendor, 2361 sizeof(inq_data->vendor), sizeof(vendor)); 2362 /* 2363 * XXX: Upgrade SPC2 to SPC3 if host is WIN8 or 2364 * WIN2012 R2 in order to support UNMAP feature. 2365 */ 2366 if (!strncmp(vendor, "Msft", 4) && 2367 SID_ANSI_REV(inq_data) == SCSI_REV_SPC2 && 2368 (vmstor_proto_version == 2369 VMSTOR_PROTOCOL_VERSION_WIN8_1 || 2370 vmstor_proto_version == 2371 VMSTOR_PROTOCOL_VERSION_WIN8)) { 2372 inq_data->version = SCSI_REV_SPC3; 2373 if (bootverbose) { 2374 xpt_print(ccb->ccb_h.path, 2375 "storvsc upgrades " 2376 "SPC2 to SPC3\n"); 2377 } 2378 } 2379 } 2380 } 2381 } else { 2382 /** 2383 * On Some Windows hosts TEST_UNIT_READY command can return 2384 * SRB_STATUS_ERROR and sense data, for example, asc=0x3a,1 2385 * "(Medium not present - tray closed)". This error can be 2386 * ignored since it will be sent to host periodically. 2387 */ 2388 boolean_t unit_not_ready = \ 2389 vm_srb->scsi_status == SCSI_STATUS_CHECK_COND && 2390 cmd->opcode == TEST_UNIT_READY && 2391 srb_status == SRB_STATUS_ERROR; 2392 if (!unit_not_ready && bootverbose) { 2393 mtx_lock(&sc->hs_lock); 2394 xpt_print(ccb->ccb_h.path, 2395 "storvsc scsi_status = %d, srb_status = %d\n", 2396 vm_srb->scsi_status, srb_status); 2397 mtx_unlock(&sc->hs_lock); 2398 } 2399 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR; 2400 } 2401 2402 ccb->csio.scsi_status = (vm_srb->scsi_status & 0xFF); 2403 if (srb_status == SRB_STATUS_SUCCESS || 2404 srb_status == SRB_STATUS_DATA_OVERRUN) 2405 ccb->csio.resid = ccb->csio.dxfer_len - vm_srb->transfer_len; 2406 else 2407 ccb->csio.resid = ccb->csio.dxfer_len; 2408 2409 if ((vm_srb->srb_status & SRB_STATUS_AUTOSENSE_VALID) != 0 && 2410 reqp->sense_info_len != 0) { 2411 csio->sense_resid = csio->sense_len - reqp->sense_info_len; 2412 ccb->ccb_h.status |= CAM_AUTOSNS_VALID; 2413 } 2414 2415 mtx_lock(&sc->hs_lock); 2416 if (reqp->softc->hs_frozen == 1) { 2417 xpt_print(ccb->ccb_h.path, 2418 "%u: storvsc unfreezing softc 0x%p.\n", 2419 ticks, reqp->softc); 2420 ccb->ccb_h.status |= CAM_RELEASE_SIMQ; 2421 reqp->softc->hs_frozen = 0; 2422 } 2423 storvsc_free_request(sc, reqp); 2424 mtx_unlock(&sc->hs_lock); 2425 2426 xpt_done_direct(ccb); 2427 } 2428 2429 /** 2430 * @brief Free a request structure 2431 * 2432 * Free a request structure by returning it to the free list 2433 * 2434 * @param sc pointer to a softc 2435 * @param reqp pointer to a request structure 2436 */ 2437 static void 2438 storvsc_free_request(struct storvsc_softc *sc, struct hv_storvsc_request *reqp) 2439 { 2440 2441 LIST_INSERT_HEAD(&sc->hs_free_list, reqp, link); 2442 } 2443 2444 /** 2445 * @brief Determine type of storage device from GUID 2446 * 2447 * Using the type GUID, determine if this is a StorVSC (paravirtual 2448 * SCSI or BlkVSC (paravirtual IDE) device. 2449 * 2450 * @param dev a device 2451 * returns an enum 2452 */ 2453 static enum hv_storage_type 2454 storvsc_get_storage_type(device_t dev) 2455 { 2456 device_t parent = device_get_parent(dev); 2457 2458 if (VMBUS_PROBE_GUID(parent, dev, &gBlkVscDeviceType) == 0) 2459 return DRIVER_BLKVSC; 2460 if (VMBUS_PROBE_GUID(parent, dev, &gStorVscDeviceType) == 0) 2461 return DRIVER_STORVSC; 2462 return DRIVER_UNKNOWN; 2463 } 2464 2465 #define PCI_VENDOR_INTEL 0x8086 2466 #define PCI_PRODUCT_PIIX4 0x7111 2467 2468 static void 2469 storvsc_ada_probe_veto(void *arg __unused, struct cam_path *path, 2470 struct ata_params *ident_buf __unused, int *veto) 2471 { 2472 2473 /* 2474 * The ATA disks are shared with the controllers managed 2475 * by this driver, so veto the ATA disks' attachment; the 2476 * ATA disks will be attached as SCSI disks once this driver 2477 * attached. 2478 */ 2479 if (path->device->protocol == PROTO_ATA) { 2480 struct ccb_pathinq cpi; 2481 2482 xpt_path_inq(&cpi, path); 2483 if (cpi.ccb_h.status == CAM_REQ_CMP && 2484 cpi.hba_vendor == PCI_VENDOR_INTEL && 2485 cpi.hba_device == PCI_PRODUCT_PIIX4) { 2486 (*veto)++; 2487 if (bootverbose) { 2488 xpt_print(path, 2489 "Disable ATA disks on " 2490 "simulated ATA controller (0x%04x%04x)\n", 2491 cpi.hba_device, cpi.hba_vendor); 2492 } 2493 } 2494 } 2495 } 2496 2497 static void 2498 storvsc_sysinit(void *arg __unused) 2499 { 2500 if (vm_guest == VM_GUEST_HV) { 2501 storvsc_handler_tag = EVENTHANDLER_REGISTER(ada_probe_veto, 2502 storvsc_ada_probe_veto, NULL, EVENTHANDLER_PRI_ANY); 2503 } 2504 } 2505 SYSINIT(storvsc_sys_init, SI_SUB_DRIVERS, SI_ORDER_SECOND, storvsc_sysinit, 2506 NULL); 2507 2508 static void 2509 storvsc_sysuninit(void *arg __unused) 2510 { 2511 if (storvsc_handler_tag != NULL) 2512 EVENTHANDLER_DEREGISTER(ada_probe_veto, storvsc_handler_tag); 2513 } 2514 SYSUNINIT(storvsc_sys_uninit, SI_SUB_DRIVERS, SI_ORDER_SECOND, 2515 storvsc_sysuninit, NULL); 2516