1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2016 Jakub Klama <jceel@FreeBSD.org>. 5 * Copyright (c) 2018 Marcelo Araujo <araujo@FreeBSD.org>. 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, this list of conditions and the following disclaimer 13 * in this position and unchanged. 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 AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/linker_set.h> 36 #include <sys/types.h> 37 #include <sys/uio.h> 38 #include <sys/time.h> 39 #include <sys/queue.h> 40 #include <sys/sbuf.h> 41 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <stdbool.h> 47 #include <string.h> 48 #include <unistd.h> 49 #include <assert.h> 50 #include <pthread.h> 51 #include <pthread_np.h> 52 53 #include <cam/scsi/scsi_all.h> 54 #include <cam/scsi/scsi_message.h> 55 #include <cam/ctl/ctl.h> 56 #include <cam/ctl/ctl_io.h> 57 #include <cam/ctl/ctl_backend.h> 58 #include <cam/ctl/ctl_ioctl.h> 59 #include <cam/ctl/ctl_util.h> 60 #include <cam/ctl/ctl_scsi_all.h> 61 #include <camlib.h> 62 63 #include "bhyverun.h" 64 #include "pci_emul.h" 65 #include "virtio.h" 66 #include "iov.h" 67 68 #define VTSCSI_RINGSZ 64 69 #define VTSCSI_REQUESTQ 1 70 #define VTSCSI_THR_PER_Q 16 71 #define VTSCSI_MAXQ (VTSCSI_REQUESTQ + 2) 72 #define VTSCSI_MAXSEG 64 73 74 #define VTSCSI_IN_HEADER_LEN(_sc) \ 75 (sizeof(struct pci_vtscsi_req_cmd_rd) + _sc->vss_config.cdb_size) 76 77 #define VTSCSI_OUT_HEADER_LEN(_sc) \ 78 (sizeof(struct pci_vtscsi_req_cmd_wr) + _sc->vss_config.sense_size) 79 80 #define VIRTIO_SCSI_MAX_CHANNEL 0 81 #define VIRTIO_SCSI_MAX_TARGET 0 82 #define VIRTIO_SCSI_MAX_LUN 16383 83 84 #define VIRTIO_SCSI_F_INOUT (1 << 0) 85 #define VIRTIO_SCSI_F_HOTPLUG (1 << 1) 86 #define VIRTIO_SCSI_F_CHANGE (1 << 2) 87 88 static int pci_vtscsi_debug = 0; 89 #define DPRINTF(params) if (pci_vtscsi_debug) printf params 90 #define WPRINTF(params) printf params 91 92 struct pci_vtscsi_config { 93 uint32_t num_queues; 94 uint32_t seg_max; 95 uint32_t max_sectors; 96 uint32_t cmd_per_lun; 97 uint32_t event_info_size; 98 uint32_t sense_size; 99 uint32_t cdb_size; 100 uint16_t max_channel; 101 uint16_t max_target; 102 uint32_t max_lun; 103 } __attribute__((packed)); 104 105 struct pci_vtscsi_queue { 106 struct pci_vtscsi_softc * vsq_sc; 107 struct vqueue_info * vsq_vq; 108 int vsq_ctl_fd; 109 pthread_mutex_t vsq_mtx; 110 pthread_mutex_t vsq_qmtx; 111 pthread_cond_t vsq_cv; 112 STAILQ_HEAD(, pci_vtscsi_request) vsq_requests; 113 LIST_HEAD(, pci_vtscsi_worker) vsq_workers; 114 }; 115 116 struct pci_vtscsi_worker { 117 struct pci_vtscsi_queue * vsw_queue; 118 pthread_t vsw_thread; 119 bool vsw_exiting; 120 LIST_ENTRY(pci_vtscsi_worker) vsw_link; 121 }; 122 123 struct pci_vtscsi_request { 124 struct pci_vtscsi_queue * vsr_queue; 125 struct iovec vsr_iov_in[VTSCSI_MAXSEG]; 126 int vsr_niov_in; 127 struct iovec vsr_iov_out[VTSCSI_MAXSEG]; 128 int vsr_niov_out; 129 uint32_t vsr_idx; 130 STAILQ_ENTRY(pci_vtscsi_request) vsr_link; 131 }; 132 133 /* 134 * Per-device softc 135 */ 136 struct pci_vtscsi_softc { 137 struct virtio_softc vss_vs; 138 struct vqueue_info vss_vq[VTSCSI_MAXQ]; 139 struct pci_vtscsi_queue vss_queues[VTSCSI_REQUESTQ]; 140 pthread_mutex_t vss_mtx; 141 int vss_iid; 142 int vss_ctl_fd; 143 uint32_t vss_features; 144 struct pci_vtscsi_config vss_config; 145 }; 146 147 #define VIRTIO_SCSI_T_TMF 0 148 #define VIRTIO_SCSI_T_TMF_ABORT_TASK 0 149 #define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1 150 #define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2 151 #define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3 152 #define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4 153 #define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5 154 #define VIRTIO_SCSI_T_TMF_QUERY_TASK 6 155 #define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7 156 157 /* command-specific response values */ 158 #define VIRTIO_SCSI_S_FUNCTION_COMPLETE 0 159 #define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10 160 #define VIRTIO_SCSI_S_FUNCTION_REJECTED 11 161 162 struct pci_vtscsi_ctrl_tmf { 163 uint32_t type; 164 uint32_t subtype; 165 uint8_t lun[8]; 166 uint64_t id; 167 uint8_t response; 168 } __attribute__((packed)); 169 170 #define VIRTIO_SCSI_T_AN_QUERY 1 171 #define VIRTIO_SCSI_EVT_ASYNC_OPERATIONAL_CHANGE 2 172 #define VIRTIO_SCSI_EVT_ASYNC_POWER_MGMT 4 173 #define VIRTIO_SCSI_EVT_ASYNC_EXTERNAL_REQUEST 8 174 #define VIRTIO_SCSI_EVT_ASYNC_MEDIA_CHANGE 16 175 #define VIRTIO_SCSI_EVT_ASYNC_MULTI_HOST 32 176 #define VIRTIO_SCSI_EVT_ASYNC_DEVICE_BUSY 64 177 178 struct pci_vtscsi_ctrl_an { 179 uint32_t type; 180 uint8_t lun[8]; 181 uint32_t event_requested; 182 uint32_t event_actual; 183 uint8_t response; 184 } __attribute__((packed)); 185 186 /* command-specific response values */ 187 #define VIRTIO_SCSI_S_OK 0 188 #define VIRTIO_SCSI_S_OVERRUN 1 189 #define VIRTIO_SCSI_S_ABORTED 2 190 #define VIRTIO_SCSI_S_BAD_TARGET 3 191 #define VIRTIO_SCSI_S_RESET 4 192 #define VIRTIO_SCSI_S_BUSY 5 193 #define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6 194 #define VIRTIO_SCSI_S_TARGET_FAILURE 7 195 #define VIRTIO_SCSI_S_NEXUS_FAILURE 8 196 #define VIRTIO_SCSI_S_FAILURE 9 197 #define VIRTIO_SCSI_S_INCORRECT_LUN 12 198 199 /* task_attr */ 200 #define VIRTIO_SCSI_S_SIMPLE 0 201 #define VIRTIO_SCSI_S_ORDERED 1 202 #define VIRTIO_SCSI_S_HEAD 2 203 #define VIRTIO_SCSI_S_ACA 3 204 205 struct pci_vtscsi_event { 206 uint32_t event; 207 uint8_t lun[8]; 208 uint32_t reason; 209 } __attribute__((packed)); 210 211 struct pci_vtscsi_req_cmd_rd { 212 uint8_t lun[8]; 213 uint64_t id; 214 uint8_t task_attr; 215 uint8_t prio; 216 uint8_t crn; 217 uint8_t cdb[]; 218 } __attribute__((packed)); 219 220 struct pci_vtscsi_req_cmd_wr { 221 uint32_t sense_len; 222 uint32_t residual; 223 uint16_t status_qualifier; 224 uint8_t status; 225 uint8_t response; 226 uint8_t sense[]; 227 } __attribute__((packed)); 228 229 static void *pci_vtscsi_proc(void *); 230 static void pci_vtscsi_reset(void *); 231 static void pci_vtscsi_neg_features(void *, uint64_t); 232 static int pci_vtscsi_cfgread(void *, int, int, uint32_t *); 233 static int pci_vtscsi_cfgwrite(void *, int, int, uint32_t); 234 static inline int pci_vtscsi_get_lun(uint8_t *); 235 static int pci_vtscsi_control_handle(struct pci_vtscsi_softc *, void *, size_t); 236 static int pci_vtscsi_tmf_handle(struct pci_vtscsi_softc *, 237 struct pci_vtscsi_ctrl_tmf *); 238 static int pci_vtscsi_an_handle(struct pci_vtscsi_softc *, 239 struct pci_vtscsi_ctrl_an *); 240 static int pci_vtscsi_request_handle(struct pci_vtscsi_queue *, struct iovec *, 241 int, struct iovec *, int); 242 static void pci_vtscsi_controlq_notify(void *, struct vqueue_info *); 243 static void pci_vtscsi_eventq_notify(void *, struct vqueue_info *); 244 static void pci_vtscsi_requestq_notify(void *, struct vqueue_info *); 245 static int pci_vtscsi_init_queue(struct pci_vtscsi_softc *, 246 struct pci_vtscsi_queue *, int); 247 static int pci_vtscsi_init(struct vmctx *, struct pci_devinst *, char *); 248 249 static struct virtio_consts vtscsi_vi_consts = { 250 "vtscsi", /* our name */ 251 VTSCSI_MAXQ, /* we support 2+n virtqueues */ 252 sizeof(struct pci_vtscsi_config), /* config reg size */ 253 pci_vtscsi_reset, /* reset */ 254 NULL, /* device-wide qnotify */ 255 pci_vtscsi_cfgread, /* read virtio config */ 256 pci_vtscsi_cfgwrite, /* write virtio config */ 257 pci_vtscsi_neg_features, /* apply negotiated features */ 258 0, /* our capabilities */ 259 }; 260 261 static void * 262 pci_vtscsi_proc(void *arg) 263 { 264 struct pci_vtscsi_worker *worker = (struct pci_vtscsi_worker *)arg; 265 struct pci_vtscsi_queue *q = worker->vsw_queue; 266 struct pci_vtscsi_request *req; 267 int iolen; 268 269 for (;;) { 270 pthread_mutex_lock(&q->vsq_mtx); 271 272 while (STAILQ_EMPTY(&q->vsq_requests) 273 && !worker->vsw_exiting) 274 pthread_cond_wait(&q->vsq_cv, &q->vsq_mtx); 275 276 if (worker->vsw_exiting) 277 break; 278 279 req = STAILQ_FIRST(&q->vsq_requests); 280 STAILQ_REMOVE_HEAD(&q->vsq_requests, vsr_link); 281 282 pthread_mutex_unlock(&q->vsq_mtx); 283 iolen = pci_vtscsi_request_handle(q, req->vsr_iov_in, 284 req->vsr_niov_in, req->vsr_iov_out, req->vsr_niov_out); 285 286 pthread_mutex_lock(&q->vsq_qmtx); 287 vq_relchain(q->vsq_vq, req->vsr_idx, iolen); 288 vq_endchains(q->vsq_vq, 0); 289 pthread_mutex_unlock(&q->vsq_qmtx); 290 291 DPRINTF(("virtio-scsi: request <idx=%d> completed\n", 292 req->vsr_idx)); 293 free(req); 294 } 295 296 pthread_mutex_unlock(&q->vsq_mtx); 297 return (NULL); 298 } 299 300 static void 301 pci_vtscsi_reset(void *vsc) 302 { 303 struct pci_vtscsi_softc *sc; 304 305 sc = vsc; 306 307 DPRINTF(("vtscsi: device reset requested\n")); 308 vi_reset_dev(&sc->vss_vs); 309 310 /* initialize config structure */ 311 sc->vss_config = (struct pci_vtscsi_config){ 312 .num_queues = VTSCSI_REQUESTQ, 313 .seg_max = VTSCSI_MAXSEG, 314 .max_sectors = 2, 315 .cmd_per_lun = 1, 316 .event_info_size = sizeof(struct pci_vtscsi_event), 317 .sense_size = 96, 318 .cdb_size = 32, 319 .max_channel = VIRTIO_SCSI_MAX_CHANNEL, 320 .max_target = VIRTIO_SCSI_MAX_TARGET, 321 .max_lun = VIRTIO_SCSI_MAX_LUN 322 }; 323 } 324 325 static void 326 pci_vtscsi_neg_features(void *vsc, uint64_t negotiated_features) 327 { 328 struct pci_vtscsi_softc *sc = vsc; 329 330 sc->vss_features = negotiated_features; 331 } 332 333 static int 334 pci_vtscsi_cfgread(void *vsc, int offset, int size, uint32_t *retval) 335 { 336 struct pci_vtscsi_softc *sc = vsc; 337 void *ptr; 338 339 ptr = (uint8_t *)&sc->vss_config + offset; 340 memcpy(retval, ptr, size); 341 return (0); 342 } 343 344 static int 345 pci_vtscsi_cfgwrite(void *vsc, int offset, int size, uint32_t val) 346 { 347 348 return (0); 349 } 350 351 static inline int 352 pci_vtscsi_get_lun(uint8_t *lun) 353 { 354 355 return (((lun[2] << 8) | lun[3]) & 0x3fff); 356 } 357 358 static int 359 pci_vtscsi_control_handle(struct pci_vtscsi_softc *sc, void *buf, 360 size_t bufsize) 361 { 362 struct pci_vtscsi_ctrl_tmf *tmf; 363 struct pci_vtscsi_ctrl_an *an; 364 uint32_t type; 365 366 type = *(uint32_t *)buf; 367 368 if (type == VIRTIO_SCSI_T_TMF) { 369 tmf = (struct pci_vtscsi_ctrl_tmf *)buf; 370 return (pci_vtscsi_tmf_handle(sc, tmf)); 371 } 372 373 if (type == VIRTIO_SCSI_T_AN_QUERY) { 374 an = (struct pci_vtscsi_ctrl_an *)buf; 375 return (pci_vtscsi_an_handle(sc, an)); 376 } 377 378 return (0); 379 } 380 381 static int 382 pci_vtscsi_tmf_handle(struct pci_vtscsi_softc *sc, 383 struct pci_vtscsi_ctrl_tmf *tmf) 384 { 385 union ctl_io *io; 386 int err; 387 388 io = ctl_scsi_alloc_io(sc->vss_iid); 389 ctl_scsi_zero_io(io); 390 391 io->io_hdr.io_type = CTL_IO_TASK; 392 io->io_hdr.nexus.targ_port = tmf->lun[1]; 393 io->io_hdr.nexus.targ_lun = pci_vtscsi_get_lun(tmf->lun); 394 io->taskio.tag_type = CTL_TAG_SIMPLE; 395 io->taskio.tag_num = (uint32_t)tmf->id; 396 397 switch (tmf->subtype) { 398 case VIRTIO_SCSI_T_TMF_ABORT_TASK: 399 io->taskio.task_action = CTL_TASK_ABORT_TASK; 400 break; 401 402 case VIRTIO_SCSI_T_TMF_ABORT_TASK_SET: 403 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 404 break; 405 406 case VIRTIO_SCSI_T_TMF_CLEAR_ACA: 407 io->taskio.task_action = CTL_TASK_CLEAR_ACA; 408 break; 409 410 case VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET: 411 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 412 break; 413 414 case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET: 415 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 416 break; 417 418 case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET: 419 io->taskio.task_action = CTL_TASK_LUN_RESET; 420 break; 421 422 case VIRTIO_SCSI_T_TMF_QUERY_TASK: 423 io->taskio.task_action = CTL_TASK_QUERY_TASK; 424 break; 425 426 case VIRTIO_SCSI_T_TMF_QUERY_TASK_SET: 427 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 428 break; 429 } 430 431 if (pci_vtscsi_debug) { 432 struct sbuf *sb = sbuf_new_auto(); 433 ctl_io_sbuf(io, sb); 434 sbuf_finish(sb); 435 DPRINTF(("pci_virtio_scsi: %s", sbuf_data(sb))); 436 sbuf_delete(sb); 437 } 438 439 err = ioctl(sc->vss_ctl_fd, CTL_IO, io); 440 if (err != 0) 441 WPRINTF(("CTL_IO: err=%d (%s)\n", errno, strerror(errno))); 442 443 tmf->response = io->taskio.task_status; 444 ctl_scsi_free_io(io); 445 return (1); 446 } 447 448 static int 449 pci_vtscsi_an_handle(struct pci_vtscsi_softc *sc, 450 struct pci_vtscsi_ctrl_an *an) 451 { 452 453 return (0); 454 } 455 456 static int 457 pci_vtscsi_request_handle(struct pci_vtscsi_queue *q, struct iovec *iov_in, 458 int niov_in, struct iovec *iov_out, int niov_out) 459 { 460 struct pci_vtscsi_softc *sc = q->vsq_sc; 461 struct pci_vtscsi_req_cmd_rd *cmd_rd = NULL; 462 struct pci_vtscsi_req_cmd_wr *cmd_wr; 463 struct iovec data_iov_in[VTSCSI_MAXSEG], data_iov_out[VTSCSI_MAXSEG]; 464 union ctl_io *io; 465 size_t data_niov_in, data_niov_out; 466 void *ext_data_ptr = NULL; 467 uint32_t ext_data_len = 0, ext_sg_entries = 0; 468 int err; 469 470 seek_iov(iov_in, niov_in, data_iov_in, &data_niov_in, 471 VTSCSI_IN_HEADER_LEN(sc)); 472 seek_iov(iov_out, niov_out, data_iov_out, &data_niov_out, 473 VTSCSI_OUT_HEADER_LEN(sc)); 474 475 truncate_iov(iov_in, niov_in, VTSCSI_IN_HEADER_LEN(sc)); 476 truncate_iov(iov_out, niov_out, VTSCSI_OUT_HEADER_LEN(sc)); 477 iov_to_buf(iov_in, niov_in, (void **)&cmd_rd); 478 479 cmd_wr = malloc(VTSCSI_OUT_HEADER_LEN(sc)); 480 io = ctl_scsi_alloc_io(sc->vss_iid); 481 ctl_scsi_zero_io(io); 482 483 io->io_hdr.nexus.targ_port = cmd_rd->lun[1]; 484 io->io_hdr.nexus.targ_lun = pci_vtscsi_get_lun(cmd_rd->lun); 485 486 io->io_hdr.io_type = CTL_IO_SCSI; 487 488 if (data_niov_in > 0) { 489 ext_data_ptr = (void *)data_iov_in; 490 ext_sg_entries = data_niov_in; 491 ext_data_len = count_iov(data_iov_in, data_niov_in); 492 io->io_hdr.flags |= CTL_FLAG_DATA_OUT; 493 } else if (data_niov_out > 0) { 494 ext_data_ptr = (void *)data_iov_out; 495 ext_sg_entries = data_niov_out; 496 ext_data_len = count_iov(data_iov_out, data_niov_out); 497 io->io_hdr.flags |= CTL_FLAG_DATA_IN; 498 } 499 500 io->scsiio.sense_len = sc->vss_config.sense_size; 501 io->scsiio.tag_num = (uint32_t)cmd_rd->id; 502 io->scsiio.tag_type = CTL_TAG_SIMPLE; 503 io->scsiio.ext_sg_entries = ext_sg_entries; 504 io->scsiio.ext_data_ptr = ext_data_ptr; 505 io->scsiio.ext_data_len = ext_data_len; 506 io->scsiio.ext_data_filled = 0; 507 io->scsiio.cdb_len = sc->vss_config.cdb_size; 508 memcpy(io->scsiio.cdb, cmd_rd->cdb, sc->vss_config.cdb_size); 509 510 if (pci_vtscsi_debug) { 511 struct sbuf *sb = sbuf_new_auto(); 512 ctl_io_sbuf(io, sb); 513 sbuf_finish(sb); 514 DPRINTF(("pci_virtio_scsi: %s", sbuf_data(sb))); 515 sbuf_delete(sb); 516 } 517 518 err = ioctl(q->vsq_ctl_fd, CTL_IO, io); 519 if (err != 0) { 520 WPRINTF(("CTL_IO: err=%d (%s)\n", errno, strerror(errno))); 521 cmd_wr->response = VIRTIO_SCSI_S_FAILURE; 522 } else { 523 cmd_wr->sense_len = MIN(io->scsiio.sense_len, 524 sc->vss_config.sense_size); 525 cmd_wr->residual = io->scsiio.residual; 526 cmd_wr->status = io->scsiio.scsi_status; 527 cmd_wr->response = VIRTIO_SCSI_S_OK; 528 memcpy(&cmd_wr->sense, &io->scsiio.sense_data, 529 cmd_wr->sense_len); 530 } 531 532 buf_to_iov(cmd_wr, VTSCSI_OUT_HEADER_LEN(sc), iov_out, niov_out, 0); 533 free(cmd_rd); 534 free(cmd_wr); 535 ctl_scsi_free_io(io); 536 return (VTSCSI_OUT_HEADER_LEN(sc) + io->scsiio.ext_data_filled); 537 } 538 539 static void 540 pci_vtscsi_controlq_notify(void *vsc, struct vqueue_info *vq) 541 { 542 struct pci_vtscsi_softc *sc; 543 struct iovec iov[VTSCSI_MAXSEG]; 544 uint16_t idx, n; 545 void *buf = NULL; 546 size_t bufsize; 547 int iolen; 548 549 sc = vsc; 550 551 while (vq_has_descs(vq)) { 552 n = vq_getchain(vq, &idx, iov, VTSCSI_MAXSEG, NULL); 553 bufsize = iov_to_buf(iov, n, &buf); 554 iolen = pci_vtscsi_control_handle(sc, buf, bufsize); 555 buf_to_iov(buf + bufsize - iolen, iolen, iov, n, iolen); 556 557 /* 558 * Release this chain and handle more 559 */ 560 vq_relchain(vq, idx, iolen); 561 } 562 vq_endchains(vq, 1); /* Generate interrupt if appropriate. */ 563 } 564 565 static void 566 pci_vtscsi_eventq_notify(void *vsc, struct vqueue_info *vq) 567 { 568 569 vq->vq_used->vu_flags |= VRING_USED_F_NO_NOTIFY; 570 } 571 572 static void 573 pci_vtscsi_requestq_notify(void *vsc, struct vqueue_info *vq) 574 { 575 struct pci_vtscsi_softc *sc; 576 struct pci_vtscsi_queue *q; 577 struct pci_vtscsi_request *req; 578 struct iovec iov[VTSCSI_MAXSEG]; 579 uint16_t flags[VTSCSI_MAXSEG]; 580 uint16_t idx, n, i; 581 int readable; 582 583 sc = vsc; 584 q = &sc->vss_queues[vq->vq_num - 2]; 585 586 while (vq_has_descs(vq)) { 587 readable = 0; 588 n = vq_getchain(vq, &idx, iov, VTSCSI_MAXSEG, flags); 589 590 /* Count readable descriptors */ 591 for (i = 0; i < n; i++) { 592 if (flags[i] & VRING_DESC_F_WRITE) 593 break; 594 595 readable++; 596 } 597 598 req = calloc(1, sizeof(struct pci_vtscsi_request)); 599 req->vsr_idx = idx; 600 req->vsr_queue = q; 601 req->vsr_niov_in = readable; 602 req->vsr_niov_out = n - readable; 603 memcpy(req->vsr_iov_in, iov, 604 req->vsr_niov_in * sizeof(struct iovec)); 605 memcpy(req->vsr_iov_out, iov + readable, 606 req->vsr_niov_out * sizeof(struct iovec)); 607 608 pthread_mutex_lock(&q->vsq_mtx); 609 STAILQ_INSERT_TAIL(&q->vsq_requests, req, vsr_link); 610 pthread_cond_signal(&q->vsq_cv); 611 pthread_mutex_unlock(&q->vsq_mtx); 612 613 DPRINTF(("virtio-scsi: request <idx=%d> enqueued\n", idx)); 614 } 615 } 616 617 static int 618 pci_vtscsi_init_queue(struct pci_vtscsi_softc *sc, 619 struct pci_vtscsi_queue *queue, int num) 620 { 621 struct pci_vtscsi_worker *worker; 622 char threadname[16]; 623 int i; 624 625 queue->vsq_sc = sc; 626 queue->vsq_ctl_fd = open("/dev/cam/ctl", O_RDWR); 627 queue->vsq_vq = &sc->vss_vq[num + 2]; 628 629 if (queue->vsq_ctl_fd < 0) { 630 WPRINTF(("cannot open /dev/cam/ctl: %s\n", strerror(errno))); 631 return (-1); 632 } 633 634 pthread_mutex_init(&queue->vsq_mtx, NULL); 635 pthread_mutex_init(&queue->vsq_qmtx, NULL); 636 pthread_cond_init(&queue->vsq_cv, NULL); 637 STAILQ_INIT(&queue->vsq_requests); 638 LIST_INIT(&queue->vsq_workers); 639 640 for (i = 0; i < VTSCSI_THR_PER_Q; i++) { 641 worker = calloc(1, sizeof(struct pci_vtscsi_worker)); 642 worker->vsw_queue = queue; 643 644 pthread_create(&worker->vsw_thread, NULL, &pci_vtscsi_proc, 645 (void *)worker); 646 647 sprintf(threadname, "virtio-scsi:%d-%d", num, i); 648 pthread_set_name_np(worker->vsw_thread, threadname); 649 LIST_INSERT_HEAD(&queue->vsq_workers, worker, vsw_link); 650 } 651 652 return (0); 653 } 654 655 static int 656 pci_vtscsi_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts) 657 { 658 struct pci_vtscsi_softc *sc; 659 char *optname = NULL; 660 char *opt; 661 int i; 662 663 sc = calloc(1, sizeof(struct pci_vtscsi_softc)); 664 sc->vss_ctl_fd = open("/dev/cam/ctl", O_RDWR); 665 666 if (sc->vss_ctl_fd < 0) { 667 WPRINTF(("cannot open /dev/cam/ctl: %s\n", strerror(errno))); 668 return (1); 669 } 670 671 while ((opt = strsep(&opts, ",")) != NULL) { 672 if ((optname = strsep(&opt, "=")) != NULL) { 673 if (strcmp(optname, "iid") == 0) { 674 sc->vss_iid = strtoul(opt, NULL, 10); 675 } 676 } 677 } 678 679 vi_softc_linkup(&sc->vss_vs, &vtscsi_vi_consts, sc, pi, sc->vss_vq); 680 sc->vss_vs.vs_mtx = &sc->vss_mtx; 681 682 /* controlq */ 683 sc->vss_vq[0].vq_qsize = VTSCSI_RINGSZ; 684 sc->vss_vq[0].vq_notify = pci_vtscsi_controlq_notify; 685 686 /* eventq */ 687 sc->vss_vq[1].vq_qsize = VTSCSI_RINGSZ; 688 sc->vss_vq[1].vq_notify = pci_vtscsi_eventq_notify; 689 690 /* request queues */ 691 for (i = 2; i < VTSCSI_MAXQ; i++) { 692 sc->vss_vq[i].vq_qsize = VTSCSI_RINGSZ; 693 sc->vss_vq[i].vq_notify = pci_vtscsi_requestq_notify; 694 pci_vtscsi_init_queue(sc, &sc->vss_queues[i - 2], i - 2); 695 } 696 697 /* initialize config space */ 698 pci_set_cfgdata16(pi, PCIR_DEVICE, VIRTIO_DEV_SCSI); 699 pci_set_cfgdata16(pi, PCIR_VENDOR, VIRTIO_VENDOR); 700 pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_STORAGE); 701 pci_set_cfgdata16(pi, PCIR_SUBDEV_0, VIRTIO_TYPE_SCSI); 702 pci_set_cfgdata16(pi, PCIR_SUBVEND_0, VIRTIO_VENDOR); 703 704 if (vi_intr_init(&sc->vss_vs, 1, fbsdrun_virtio_msix())) 705 return (1); 706 vi_set_io_bar(&sc->vss_vs, 0); 707 708 return (0); 709 } 710 711 712 struct pci_devemu pci_de_vscsi = { 713 .pe_emu = "virtio-scsi", 714 .pe_init = pci_vtscsi_init, 715 .pe_barwrite = vi_pci_write, 716 .pe_barread = vi_pci_read 717 }; 718 PCI_EMUL_SET(pci_de_vscsi); 719