1 /*- 2 * Copyright (c) 2007 Scott Long 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification, immediately at the beginning of the file. 11 * 2. The name of the author may not be used to endorse or promote products 12 * derived from this software without specific prior written permission. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 18 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * scsi_sg peripheral driver. This driver is meant to implement the Linux 29 * SG passthrough interface for SCSI. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/types.h> 36 #include <sys/bio.h> 37 #include <sys/caps.h> 38 #include <sys/conf.h> 39 #include <sys/malloc.h> 40 #include <sys/fcntl.h> 41 #include <sys/errno.h> 42 #include <sys/devicestat.h> 43 #include <sys/proc.h> 44 #include <sys/uio.h> 45 #include <sys/device.h> 46 #include <sys/sysmsg.h> 47 48 #include "../cam.h" 49 #include "../cam_ccb.h" 50 #include "../cam_periph.h" 51 #include "../cam_queue.h" 52 #include "../cam_xpt_periph.h" 53 #include "../cam_debug.h" 54 #include "../cam_sim.h" 55 56 #include "scsi_all.h" 57 #include "scsi_message.h" 58 #include "scsi_sg.h" 59 60 typedef enum { 61 SG_FLAG_OPEN = 0x01, 62 SG_FLAG_LOCKED = 0x02, 63 SG_FLAG_INVALID = 0x04 64 } sg_flags; 65 66 typedef enum { 67 SG_STATE_NORMAL 68 } sg_state; 69 70 typedef enum { 71 SG_RDWR_FREE, 72 SG_RDWR_INPROG, 73 SG_RDWR_DONE 74 } sg_rdwr_state; 75 76 typedef enum { 77 SG_CCB_POLLED, 78 SG_CCB_RDWR_IO, 79 SG_CCB_WAITING 80 } sg_ccb_types; 81 82 #define ccb_type ppriv_field0 83 #define ccb_rdwr ppriv_ptr1 84 85 struct sg_rdwr { 86 TAILQ_ENTRY(sg_rdwr) rdwr_link; 87 int tag; 88 int state; 89 int buf_len; 90 char *buf; 91 union ccb *ccb; 92 union { 93 struct sg_header hdr; 94 struct sg_io_hdr io_hdr; 95 } hdr; 96 }; 97 98 struct sg_softc { 99 sg_state state; 100 sg_flags flags; 101 struct devstat device_stats; 102 TAILQ_HEAD(, sg_rdwr) rdwr_done; 103 cdev_t dev; 104 int sg_timeout; 105 int sg_user_timeout; 106 uint8_t pd_type; 107 union ccb saved_ccb; 108 }; 109 110 static d_open_t sgopen; 111 static d_close_t sgclose; 112 static d_ioctl_t sgioctl; 113 static d_write_t sgwrite; 114 static d_read_t sgread; 115 116 static periph_init_t sginit; 117 static periph_ctor_t sgregister; 118 static periph_oninv_t sgoninvalidate; 119 static periph_dtor_t sgcleanup; 120 static periph_start_t sgstart; 121 static void sgasync(void *callback_arg, uint32_t code, 122 struct cam_path *path, void *arg); 123 static void sgdone(struct cam_periph *periph, union ccb *done_ccb); 124 static int sgsendccb(struct cam_periph *periph, union ccb *ccb); 125 static int sgsendrdwr(struct cam_periph *periph, union ccb *ccb); 126 static int sgerror(union ccb *ccb, uint32_t cam_flags, 127 uint32_t sense_flags); 128 static void sg_scsiio_status(struct ccb_scsiio *csio, 129 u_short *hoststat, u_short *drvstat); 130 131 static int scsi_group_len(u_char cmd); 132 133 static struct periph_driver sgdriver = 134 { 135 sginit, "sg", 136 TAILQ_HEAD_INITIALIZER(sgdriver.units), /* gen */ 0 137 }; 138 PERIPHDRIVER_DECLARE(sg, sgdriver); 139 140 static struct dev_ops sg_ops = { 141 { "sg", 0, D_DISK | D_MPSAFE }, 142 .d_open = sgopen, 143 .d_close = sgclose, 144 .d_read = sgread, 145 .d_write = sgwrite, 146 .d_ioctl = sgioctl 147 }; 148 149 static int sg_version = 30125; 150 151 static void 152 sginit(void) 153 { 154 cam_status status; 155 156 /* 157 * Install a global async callback. This callback will receive aync 158 * callbacks like "new device found". 159 */ 160 status = xpt_register_async(AC_FOUND_DEVICE, sgasync, NULL, NULL); 161 162 if (status != CAM_REQ_CMP) { 163 kprintf("sg: Failed to attach master async callbac " 164 "due to status 0x%x!\n", status); 165 } 166 } 167 168 static void 169 sgoninvalidate(struct cam_periph *periph) 170 { 171 struct sg_softc *softc; 172 173 softc = (struct sg_softc *)periph->softc; 174 175 /* 176 * Deregister any async callbacks. 177 */ 178 xpt_register_async(0, sgasync, periph, periph->path); 179 180 softc->flags |= SG_FLAG_INVALID; 181 182 /* 183 * XXX Return all queued I/O with ENXIO. 184 * XXX Handle any transactions queued to the card 185 * with XPT_ABORT_CCB. 186 */ 187 188 if (bootverbose) { 189 xpt_print(periph->path, "lost device\n"); 190 } 191 } 192 193 static void 194 sgcleanup(struct cam_periph *periph) 195 { 196 struct sg_softc *softc; 197 198 softc = (struct sg_softc *)periph->softc; 199 if (bootverbose) 200 xpt_print(periph->path, "removing device entry\n"); 201 devstat_remove_entry(&softc->device_stats); 202 cam_periph_unlock(periph); 203 destroy_dev(softc->dev); 204 cam_periph_lock(periph); 205 kfree(softc, M_DEVBUF); 206 } 207 208 static void 209 sgasync(void *callback_arg, uint32_t code, struct cam_path *path, void *arg) 210 { 211 struct cam_periph *periph; 212 213 periph = (struct cam_periph *)callback_arg; 214 215 switch (code) { 216 case AC_FOUND_DEVICE: 217 { 218 struct ccb_getdev *cgd; 219 cam_status status; 220 221 cgd = (struct ccb_getdev *)arg; 222 if (cgd == NULL) 223 break; 224 225 #if 0 226 if (cgd->protocol != PROTO_SCSI) 227 break; 228 #endif 229 230 /* 231 * Allocate a peripheral instance for this device and 232 * start the probe process. 233 */ 234 status = cam_periph_alloc(sgregister, sgoninvalidate, 235 sgcleanup, sgstart, 236 "sg", CAM_PERIPH_BIO, cgd->ccb_h.path, 237 sgasync, AC_FOUND_DEVICE, cgd); 238 if ((status != CAM_REQ_CMP) && (status != CAM_REQ_INPROG)) { 239 const struct cam_status_entry *entry; 240 241 entry = cam_fetch_status_entry(status); 242 kprintf("sgasync: Unable to attach new device " 243 "due to status %#x: %s\n", status, entry ? 244 entry->status_text : "Unknown"); 245 } 246 break; 247 } 248 default: 249 cam_periph_async(periph, code, path, arg); 250 break; 251 } 252 } 253 254 static cam_status 255 sgregister(struct cam_periph *periph, void *arg) 256 { 257 struct sg_softc *softc; 258 struct ccb_getdev *cgd; 259 int no_tags; 260 261 cgd = (struct ccb_getdev *)arg; 262 if (periph == NULL) { 263 kprintf("sgregister: periph was NULL!!\n"); 264 return (CAM_REQ_CMP_ERR); 265 } 266 267 if (cgd == NULL) { 268 kprintf("sgregister: no getdev CCB, can't register device\n"); 269 return (CAM_REQ_CMP_ERR); 270 } 271 272 softc = kmalloc(sizeof(*softc), M_DEVBUF, M_WAITOK | M_ZERO); 273 softc->state = SG_STATE_NORMAL; 274 softc->pd_type = SID_TYPE(&cgd->inq_data); 275 softc->sg_timeout = SG_DEFAULT_TIMEOUT / SG_DEFAULT_HZ * hz; 276 softc->sg_user_timeout = SG_DEFAULT_TIMEOUT; 277 TAILQ_INIT(&softc->rdwr_done); 278 periph->softc = softc; 279 280 /* 281 * We pass in 0 for all blocksize, since we don't know what the 282 * blocksize of the device is, if it even has a blocksize. 283 */ 284 cam_periph_unlock(periph); 285 no_tags = (cgd->inq_data.flags & SID_CmdQue) == 0; 286 devstat_add_entry(&softc->device_stats, "sg", 287 periph->unit_number, 0, 288 DEVSTAT_NO_BLOCKSIZE | 289 (no_tags ? DEVSTAT_NO_ORDERED_TAGS : 0), 290 softc->pd_type | 291 DEVSTAT_TYPE_IF_SCSI | DEVSTAT_PRIORITY_PASS, 292 DEVSTAT_PRIORITY_PASS); 293 294 /* Register the device */ 295 softc->dev = make_dev(&sg_ops, periph->unit_number, 296 UID_ROOT, GID_OPERATOR, 0600, "%s%d", 297 periph->periph_name, periph->unit_number); 298 make_dev_alias(softc->dev, "sg%c", 'a' + periph->unit_number); 299 cam_periph_lock(periph); 300 softc->dev->si_drv1 = periph; 301 302 /* 303 * Add as async callback so that we get 304 * notified if this device goes away. 305 */ 306 xpt_register_async(AC_LOST_DEVICE, sgasync, periph, periph->path); 307 308 #if 0 309 if (bootverbose) 310 xpt_announce_periph(periph, NULL); 311 #endif 312 313 return (CAM_REQ_CMP); 314 } 315 316 static void 317 sgstart(struct cam_periph *periph, union ccb *start_ccb) 318 { 319 struct sg_softc *softc; 320 321 softc = (struct sg_softc *)periph->softc; 322 323 switch (softc->state) { 324 case SG_STATE_NORMAL: 325 start_ccb->ccb_h.ccb_type = SG_CCB_WAITING; 326 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 327 periph_links.sle); 328 periph->immediate_priority = CAM_PRIORITY_NONE; 329 wakeup(&periph->ccb_list); 330 break; 331 } 332 } 333 334 static void 335 sgdone(struct cam_periph *periph, union ccb *done_ccb) 336 { 337 struct sg_softc *softc; 338 struct ccb_scsiio *csio; 339 340 softc = (struct sg_softc *)periph->softc; 341 csio = &done_ccb->csio; 342 343 switch (csio->ccb_h.ccb_type) { 344 case SG_CCB_WAITING: 345 /* Caller will release the CCB */ 346 wakeup(&done_ccb->ccb_h.cbfcnp); 347 return; 348 case SG_CCB_RDWR_IO: 349 { 350 struct sg_rdwr *rdwr; 351 352 devstat_end_transaction( 353 &softc->device_stats, 354 csio->dxfer_len, 355 csio->tag_action & 0xf, 356 ((csio->ccb_h.flags & CAM_DIR_MASK) == 357 CAM_DIR_NONE) ? DEVSTAT_NO_DATA : 358 ((csio->ccb_h.flags & CAM_DIR_OUT) ? 359 DEVSTAT_WRITE : DEVSTAT_READ)); 360 361 rdwr = done_ccb->ccb_h.ccb_rdwr; 362 rdwr->state = SG_RDWR_DONE; 363 wakeup(rdwr); 364 break; 365 } 366 case SG_CCB_POLLED: 367 wakeup(&done_ccb->ccb_h.cbfcnp); 368 return; 369 default: 370 panic("unknown sg CCB type"); 371 } 372 } 373 374 static int 375 sgopen(struct dev_open_args *ap) 376 /*cdev_t dev, int flags, int fmt, struct thread *td)*/ 377 { 378 struct cam_periph *periph; 379 struct sg_softc *softc; 380 int error = 0; 381 382 /* 383 * Disallow CAM access if RESTRICTEDROOT 384 */ 385 if (caps_priv_check_self(SYSCAP_RESTRICTEDROOT)) 386 return (EPERM); 387 388 periph = (struct cam_periph *)ap->a_head.a_dev->si_drv1; 389 if (periph == NULL) 390 return (ENXIO); 391 392 /* 393 * Don't allow access when we're running at a high securelevel. 394 */ 395 if (securelevel > 1) { 396 cam_periph_unlock(periph); 397 cam_periph_release(periph); 398 return(EPERM); 399 } 400 cam_periph_lock(periph); 401 402 softc = (struct sg_softc *)periph->softc; 403 if (softc->flags & SG_FLAG_INVALID) { 404 cam_periph_unlock(periph); 405 return (ENXIO); 406 } 407 408 if ((softc->flags & SG_FLAG_OPEN) == 0) { 409 softc->flags |= SG_FLAG_OPEN; 410 cam_periph_unlock(periph); 411 } else { 412 /* Device closes aren't symmetrical, fix up the refcount. */ 413 cam_periph_unlock(periph); 414 cam_periph_release(periph); 415 } 416 417 return (error); 418 } 419 420 static int 421 sgclose(struct dev_close_args *ap) 422 /* cdev_t dev, int flag, int fmt, struct thread *td) */ 423 { 424 struct cam_periph *periph; 425 struct sg_softc *softc; 426 427 periph = (struct cam_periph *)ap->a_head.a_dev->si_drv1; 428 if (periph == NULL) 429 return (ENXIO); 430 431 cam_periph_lock(periph); 432 433 softc = (struct sg_softc *)periph->softc; 434 softc->flags &= ~SG_FLAG_OPEN; 435 436 cam_periph_unlock(periph); 437 cam_periph_release(periph); 438 439 return (0); 440 } 441 442 static int 443 sgioctl(struct dev_ioctl_args *ap) 444 /* cdev_t dev, u_long cmd, caddr_t arg, int flag, struct thread *td) */ 445 { 446 union ccb *ccb; 447 struct ccb_scsiio *csio; 448 struct cam_periph *periph; 449 struct sg_softc *softc; 450 struct sg_io_hdr req; 451 int dir, error; 452 453 periph = (struct cam_periph *)ap->a_head.a_dev->si_drv1; 454 if (periph == NULL) 455 return (ENXIO); 456 457 cam_periph_lock(periph); 458 459 softc = (struct sg_softc *)periph->softc; 460 error = 0; 461 462 switch (ap->a_cmd) { 463 #if 0 464 case LINUX_SCSI_GET_BUS_NUMBER: { 465 int busno; 466 467 busno = xpt_path_path_id(periph->path); 468 error = copyout(&busno, ap->a_data, sizeof(busno)); 469 break; 470 } 471 case LINUX_SCSI_GET_IDLUN: { 472 struct scsi_idlun idlun; 473 struct cam_sim *sim; 474 475 idlun.dev_id = xpt_path_target_id(periph->path); 476 sim = xpt_path_sim(periph->path); 477 idlun.host_unique_id = sim->unit_number; 478 error = copyout(&idlun, ap->a_data, sizeof(idlun)); 479 break; 480 } 481 #endif 482 case SG_GET_VERSION_NUM: 483 error = copyout(&sg_version, ap->a_data, sizeof(sg_version)); 484 break; 485 case SG_SET_TIMEOUT: { 486 u_int user_timeout; 487 488 error = copyin(ap->a_data, &user_timeout, sizeof(u_int)); 489 if (error == 0) { 490 softc->sg_user_timeout = user_timeout; 491 softc->sg_timeout = user_timeout / SG_DEFAULT_HZ * hz; 492 } 493 break; 494 } 495 case SG_GET_TIMEOUT: 496 /* 497 * The value is returned directly to the syscall. 498 */ 499 ap->a_sysmsg->sysmsg_result = softc->sg_user_timeout; 500 error = 0; 501 break; 502 case SG_IO: 503 error = copyin(ap->a_data, &req, sizeof(req)); 504 if (error) 505 break; 506 507 if (req.cmd_len > IOCDBLEN) { 508 error = EINVAL; 509 break; 510 } 511 512 if (req.iovec_count != 0) { 513 error = EOPNOTSUPP; 514 break; 515 } 516 517 ccb = cam_periph_getccb(periph, /*priority*/5); 518 ccb->ccb_h.ccb_type = SG_CCB_POLLED; 519 csio = &ccb->csio; 520 521 error = copyin(req.cmdp, &csio->cdb_io.cdb_bytes, req.cmd_len); 522 if (error) { 523 xpt_release_ccb(ccb); 524 break; 525 } 526 527 switch(req.dxfer_direction) { 528 case SG_DXFER_TO_DEV: 529 dir = CAM_DIR_OUT; 530 break; 531 case SG_DXFER_FROM_DEV: 532 dir = CAM_DIR_IN; 533 break; 534 case SG_DXFER_TO_FROM_DEV: 535 dir = CAM_DIR_IN | CAM_DIR_OUT; 536 break; 537 case SG_DXFER_NONE: 538 default: 539 dir = CAM_DIR_NONE; 540 break; 541 } 542 543 cam_fill_csio(csio, 544 /*retries*/1, 545 sgdone, 546 dir|CAM_DEV_QFRZDIS, 547 MSG_SIMPLE_Q_TAG, 548 req.dxferp, 549 req.dxfer_len, 550 req.mx_sb_len, 551 req.cmd_len, 552 req.timeout); 553 554 error = sgsendccb(periph, ccb); 555 if (error) { 556 req.host_status = DID_ERROR; 557 req.driver_status = DRIVER_INVALID; 558 xpt_release_ccb(ccb); 559 break; 560 } 561 562 req.status = csio->scsi_status; 563 req.masked_status = (csio->scsi_status >> 1) & 0x7f; 564 sg_scsiio_status(csio, &req.host_status, &req.driver_status); 565 req.resid = csio->resid; 566 req.duration = csio->ccb_h.timeout; 567 req.info = 0; 568 569 error = copyout(&req, ap->a_data, sizeof(req)); 570 if ((error == 0) && (csio->ccb_h.status & CAM_AUTOSNS_VALID) 571 && (req.sbp != NULL)) { 572 req.sb_len_wr = req.mx_sb_len - csio->sense_resid; 573 error = copyout(&csio->sense_data, req.sbp, 574 req.sb_len_wr); 575 } 576 577 xpt_release_ccb(ccb); 578 break; 579 580 case SG_GET_RESERVED_SIZE: { 581 int size = 32768; 582 583 error = copyout(&size, ap->a_data, sizeof(size)); 584 break; 585 } 586 587 case SG_GET_SCSI_ID: 588 { 589 struct sg_scsi_id id; 590 591 id.host_no = 0; /* XXX */ 592 id.channel = xpt_path_path_id(periph->path); 593 id.scsi_id = xpt_path_target_id(periph->path); 594 id.lun = xpt_path_lun_id(periph->path); 595 id.scsi_type = softc->pd_type; 596 id.h_cmd_per_lun = 1; 597 id.d_queue_depth = 1; 598 id.unused[0] = 0; 599 id.unused[1] = 0; 600 601 error = copyout(&id, ap->a_data, sizeof(id)); 602 break; 603 } 604 605 case SG_EMULATED_HOST: 606 case SG_SET_TRANSFORM: 607 case SG_GET_TRANSFORM: 608 case SG_GET_NUM_WAITING: 609 case SG_SCSI_RESET: 610 case SG_GET_REQUEST_TABLE: 611 case SG_SET_KEEP_ORPHAN: 612 case SG_GET_KEEP_ORPHAN: 613 case SG_GET_ACCESS_COUNT: 614 case SG_SET_FORCE_LOW_DMA: 615 case SG_GET_LOW_DMA: 616 case SG_GET_SG_TABLESIZE: 617 case SG_SET_FORCE_PACK_ID: 618 case SG_GET_PACK_ID: 619 case SG_SET_RESERVED_SIZE: 620 case SG_GET_COMMAND_Q: 621 case SG_SET_COMMAND_Q: 622 case SG_SET_DEBUG: 623 case SG_NEXT_CMD_LEN: 624 default: 625 #ifdef CAMDEBUG 626 kprintf("sgioctl: rejecting cmd 0x%lx\n", ap->a_cmd); 627 #endif 628 error = ENODEV; 629 break; 630 } 631 632 cam_periph_unlock(periph); 633 return (error); 634 } 635 636 static int 637 sgwrite(struct dev_write_args *ap) 638 /*cdev_t dev, struct uio *uio, int ioflag)*/ 639 { 640 union ccb *ccb; 641 struct cam_periph *periph; 642 struct ccb_scsiio *csio; 643 struct sg_softc *sc; 644 struct sg_header *hdr; 645 struct sg_rdwr *rdwr; 646 u_char cdb_cmd; 647 char *buf; 648 int error = 0, cdb_len, buf_len, dir; 649 struct uio *uio = ap->a_uio; 650 651 periph = ap->a_head.a_dev->si_drv1; 652 rdwr = kmalloc(sizeof(*rdwr), M_DEVBUF, M_WAITOK | M_ZERO); 653 hdr = &rdwr->hdr.hdr; 654 655 /* Copy in the header block and sanity check it */ 656 if (uio->uio_resid < sizeof(*hdr)) { 657 error = EINVAL; 658 goto out_hdr; 659 } 660 error = uiomove((char *)hdr, sizeof(*hdr), uio); 661 if (error) 662 goto out_hdr; 663 664 ccb = xpt_alloc_ccb(); 665 if (ccb == NULL) { 666 error = ENOMEM; 667 goto out_hdr; 668 } 669 csio = &ccb->csio; 670 671 /* 672 * Copy in the CDB block. The designers of the interface didn't 673 * bother to provide a size for this in the header, so we have to 674 * figure it out ourselves. 675 */ 676 if (uio->uio_resid < 1) 677 goto out_ccb; 678 error = uiomove(&cdb_cmd, 1, uio); 679 if (error) 680 goto out_ccb; 681 if (hdr->twelve_byte) 682 cdb_len = 12; 683 else 684 cdb_len = scsi_group_len(cdb_cmd); 685 /* 686 * We've already read the first byte of the CDB and advanced the uio 687 * pointer. Just read the rest. 688 */ 689 csio->cdb_io.cdb_bytes[0] = cdb_cmd; 690 error = uiomove(&csio->cdb_io.cdb_bytes[1], cdb_len - 1, uio); 691 if (error) 692 goto out_ccb; 693 694 /* 695 * Now set up the data block. Again, the designers didn't bother 696 * to make this reliable. 697 */ 698 buf_len = uio->uio_resid; 699 if (buf_len != 0) { 700 buf = kmalloc(buf_len, M_DEVBUF, M_WAITOK | M_ZERO); 701 error = uiomove(buf, buf_len, uio); 702 if (error) 703 goto out_buf; 704 dir = CAM_DIR_OUT; 705 } else if (hdr->reply_len != 0) { 706 buf = kmalloc(hdr->reply_len, M_DEVBUF, M_WAITOK | M_ZERO); 707 buf_len = hdr->reply_len; 708 dir = CAM_DIR_IN; 709 } else { 710 buf = NULL; 711 buf_len = 0; 712 dir = CAM_DIR_NONE; 713 } 714 715 cam_periph_lock(periph); 716 sc = periph->softc; 717 xpt_setup_ccb(&ccb->ccb_h, periph->path, /*priority*/5); 718 cam_fill_csio(csio, 719 /*retries*/1, 720 sgdone, 721 dir|CAM_DEV_QFRZDIS, 722 MSG_SIMPLE_Q_TAG, 723 buf, 724 buf_len, 725 SG_MAX_SENSE, 726 cdb_len, 727 sc->sg_timeout); 728 729 /* 730 * Send off the command and hope that it works. This path does not 731 * go through sgstart because the I/O is supposed to be asynchronous. 732 */ 733 rdwr->buf = buf; 734 rdwr->buf_len = buf_len; 735 rdwr->tag = hdr->pack_id; 736 rdwr->ccb = ccb; 737 rdwr->state = SG_RDWR_INPROG; 738 ccb->ccb_h.ccb_rdwr = rdwr; 739 ccb->ccb_h.ccb_type = SG_CCB_RDWR_IO; 740 TAILQ_INSERT_TAIL(&sc->rdwr_done, rdwr, rdwr_link); 741 error = sgsendrdwr(periph, ccb); 742 cam_periph_unlock(periph); 743 return (error); 744 745 out_buf: 746 kfree(buf, M_DEVBUF); 747 out_ccb: 748 xpt_free_ccb(&ccb->ccb_h); 749 out_hdr: 750 kfree(rdwr, M_DEVBUF); 751 return (error); 752 } 753 754 static int 755 sgread(struct dev_read_args *ap) 756 /*cdev_t dev, struct uio *uio, int ioflag)*/ 757 { 758 struct ccb_scsiio *csio; 759 struct cam_periph *periph; 760 struct sg_softc *sc; 761 struct sg_header *hdr; 762 struct sg_rdwr *rdwr; 763 u_short hstat, dstat; 764 int error, pack_len, reply_len, pack_id; 765 struct uio *uio = ap->a_uio; 766 767 periph = ap->a_head.a_dev->si_drv1; 768 769 /* XXX The pack len field needs to be updated and written out instead 770 * of discarded. Not sure how to do that. 771 */ 772 uio->uio_rw = UIO_WRITE; 773 if ((error = uiomove((char *)&pack_len, 4, uio)) != 0) 774 return (error); 775 if ((error = uiomove((char *)&reply_len, 4, uio)) != 0) 776 return (error); 777 if ((error = uiomove((char *)&pack_id, 4, uio)) != 0) 778 return (error); 779 uio->uio_rw = UIO_READ; 780 781 cam_periph_lock(periph); 782 sc = periph->softc; 783 search: 784 TAILQ_FOREACH(rdwr, &sc->rdwr_done, rdwr_link) { 785 if (rdwr->tag == pack_id) 786 break; 787 } 788 if (rdwr == NULL) { 789 cam_periph_unlock(periph); 790 if (tsleep(&hstat, PCATCH, "sgnull", 0) == ERESTART) 791 return(EAGAIN); 792 cam_periph_lock(periph); 793 goto search; 794 } 795 if (rdwr->state != SG_RDWR_DONE) { 796 tsleep_interlock(rdwr, PCATCH); 797 cam_periph_unlock(periph); 798 if (rdwr->state != SG_RDWR_DONE) { 799 if (tsleep(rdwr, PCATCH | PINTERLOCKED, "sgread", 0) == 800 ERESTART) { 801 return (EAGAIN); 802 } 803 } 804 cam_periph_lock(periph); 805 goto search; 806 } 807 TAILQ_REMOVE(&sc->rdwr_done, rdwr, rdwr_link); 808 cam_periph_unlock(periph); 809 810 hdr = &rdwr->hdr.hdr; 811 csio = &rdwr->ccb->csio; 812 sg_scsiio_status(csio, &hstat, &dstat); 813 hdr->host_status = hstat; 814 hdr->driver_status = dstat; 815 hdr->target_status = csio->scsi_status >> 1; 816 817 switch (hstat) { 818 case DID_OK: 819 case DID_PASSTHROUGH: 820 case DID_SOFT_ERROR: 821 hdr->result = 0; 822 break; 823 case DID_NO_CONNECT: 824 case DID_BUS_BUSY: 825 case DID_TIME_OUT: 826 hdr->result = EBUSY; 827 break; 828 case DID_BAD_TARGET: 829 case DID_ABORT: 830 case DID_PARITY: 831 case DID_RESET: 832 case DID_BAD_INTR: 833 case DID_ERROR: 834 default: 835 hdr->result = EIO; 836 break; 837 } 838 839 if (dstat == DRIVER_SENSE) { 840 bcopy(&csio->sense_data, hdr->sense_buffer, 841 min(csio->sense_len, SG_MAX_SENSE)); 842 #ifdef CAMDEBUG 843 scsi_sense_print(csio); 844 #endif 845 } 846 847 error = uiomove((char *)&hdr->result, sizeof(*hdr) - 848 offsetof(struct sg_header, result), uio); 849 if ((error == 0) && (hdr->result == 0)) 850 error = uiomove(rdwr->buf, rdwr->buf_len, uio); 851 852 cam_periph_lock(periph); 853 xpt_free_ccb(&rdwr->ccb->ccb_h); 854 cam_periph_unlock(periph); 855 kfree(rdwr->buf, M_DEVBUF); 856 kfree(rdwr, M_DEVBUF); 857 return (error); 858 } 859 860 static int 861 sgsendccb(struct cam_periph *periph, union ccb *ccb) 862 { 863 struct sg_softc *softc; 864 struct cam_periph_map_info mapinfo; 865 int error, need_unmap = 0; 866 867 softc = periph->softc; 868 if (((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) 869 && (ccb->csio.data_ptr != NULL)) { 870 bzero(&mapinfo, sizeof(mapinfo)); 871 872 /* 873 * cam_periph_mapmem calls into proc and vm functions that can 874 * sleep as well as trigger I/O, so we can't hold the lock. 875 * Dropping it here is reasonably safe. 876 */ 877 cam_periph_unlock(periph); 878 error = cam_periph_mapmem(ccb, &mapinfo); 879 cam_periph_lock(periph); 880 if (error) 881 return (error); 882 need_unmap = 1; 883 } 884 885 error = cam_periph_runccb(ccb, sgerror, CAM_RETRY_SELTO, 886 SF_RETRY_UA, &softc->device_stats); 887 888 if (need_unmap) 889 cam_periph_unmapmem(ccb, &mapinfo); 890 891 return (error); 892 } 893 894 static int 895 sgsendrdwr(struct cam_periph *periph, union ccb *ccb) 896 { 897 struct sg_softc *softc; 898 899 softc = periph->softc; 900 devstat_start_transaction(&softc->device_stats); 901 xpt_action(ccb); 902 return (0); 903 } 904 905 static int 906 sgerror(union ccb *ccb, uint32_t cam_flags, uint32_t sense_flags) 907 { 908 struct cam_periph *periph; 909 struct sg_softc *softc; 910 911 periph = xpt_path_periph(ccb->ccb_h.path); 912 softc = (struct sg_softc *)periph->softc; 913 914 return (cam_periph_error(ccb, cam_flags, sense_flags, 915 &softc->saved_ccb)); 916 } 917 918 static void 919 sg_scsiio_status(struct ccb_scsiio *csio, u_short *hoststat, u_short *drvstat) 920 { 921 int status; 922 923 status = csio->ccb_h.status; 924 925 switch (status & CAM_STATUS_MASK) { 926 case CAM_REQ_CMP: 927 *hoststat = DID_OK; 928 *drvstat = 0; 929 break; 930 case CAM_REQ_CMP_ERR: 931 *hoststat = DID_ERROR; 932 *drvstat = 0; 933 break; 934 case CAM_REQ_ABORTED: 935 *hoststat = DID_ABORT; 936 *drvstat = 0; 937 break; 938 case CAM_REQ_INVALID: 939 *hoststat = DID_ERROR; 940 *drvstat = DRIVER_INVALID; 941 break; 942 case CAM_DEV_NOT_THERE: 943 *hoststat = DID_BAD_TARGET; 944 *drvstat = 0; 945 break; 946 case CAM_SEL_TIMEOUT: 947 *hoststat = DID_NO_CONNECT; 948 *drvstat = 0; 949 break; 950 case CAM_CMD_TIMEOUT: 951 *hoststat = DID_TIME_OUT; 952 *drvstat = 0; 953 break; 954 case CAM_SCSI_STATUS_ERROR: 955 *hoststat = DID_ERROR; 956 *drvstat = 0; 957 break; 958 case CAM_SCSI_BUS_RESET: 959 *hoststat = DID_RESET; 960 *drvstat = 0; 961 break; 962 case CAM_UNCOR_PARITY: 963 *hoststat = DID_PARITY; 964 *drvstat = 0; 965 break; 966 case CAM_SCSI_BUSY: 967 *hoststat = DID_BUS_BUSY; 968 *drvstat = 0; 969 break; 970 default: 971 *hoststat = DID_ERROR; 972 *drvstat = DRIVER_ERROR; 973 } 974 975 if (status & CAM_AUTOSNS_VALID) 976 *drvstat = DRIVER_SENSE; 977 } 978 979 static int 980 scsi_group_len(u_char cmd) 981 { 982 int len[] = {6, 10, 10, 12, 12, 12, 10, 10}; 983 int group; 984 985 group = (cmd >> 5) & 0x7; 986 return (len[group]); 987 } 988