1 /*- 2 * Copyright (c) 2000, 2001 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: src/sys/dev/mly/mly.c,v 1.3.2.3 2001/03/05 20:17:24 msmith Exp $ 28 * $DragonFly: src/sys/dev/raid/mly/mly.c,v 1.2 2003/06/17 04:28:28 dillon Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/malloc.h> 34 #include <sys/kernel.h> 35 #include <sys/bus.h> 36 #include <sys/conf.h> 37 #include <sys/ctype.h> 38 #include <sys/ioccom.h> 39 #include <sys/stat.h> 40 41 #include <machine/bus_memio.h> 42 #include <machine/bus.h> 43 #include <machine/resource.h> 44 #include <sys/rman.h> 45 46 #include <cam/scsi/scsi_all.h> 47 48 #include <dev/mly/mlyreg.h> 49 #include <dev/mly/mlyio.h> 50 #include <dev/mly/mlyvar.h> 51 #define MLY_DEFINE_TABLES 52 #include <dev/mly/mly_tables.h> 53 54 static int mly_get_controllerinfo(struct mly_softc *sc); 55 static void mly_scan_devices(struct mly_softc *sc); 56 static void mly_rescan_btl(struct mly_softc *sc, int bus, int target); 57 static void mly_complete_rescan(struct mly_command *mc); 58 static int mly_get_eventstatus(struct mly_softc *sc); 59 static int mly_enable_mmbox(struct mly_softc *sc); 60 static int mly_flush(struct mly_softc *sc); 61 static int mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, 62 size_t datasize, u_int8_t *status, void *sense_buffer, size_t *sense_length); 63 static void mly_fetch_event(struct mly_softc *sc); 64 static void mly_complete_event(struct mly_command *mc); 65 static void mly_process_event(struct mly_softc *sc, struct mly_event *me); 66 static void mly_periodic(void *data); 67 68 static int mly_immediate_command(struct mly_command *mc); 69 static int mly_start(struct mly_command *mc); 70 static void mly_complete(void *context, int pending); 71 72 static void mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error); 73 static int mly_alloc_commands(struct mly_softc *sc); 74 static void mly_map_command(struct mly_command *mc); 75 static void mly_unmap_command(struct mly_command *mc); 76 77 static int mly_fwhandshake(struct mly_softc *sc); 78 79 static void mly_describe_controller(struct mly_softc *sc); 80 #ifdef MLY_DEBUG 81 static void mly_printstate(struct mly_softc *sc); 82 static void mly_print_command(struct mly_command *mc); 83 static void mly_print_packet(struct mly_command *mc); 84 static void mly_panic(struct mly_softc *sc, char *reason); 85 #endif 86 void mly_print_controller(int controller); 87 88 static d_open_t mly_user_open; 89 static d_close_t mly_user_close; 90 static d_ioctl_t mly_user_ioctl; 91 static int mly_user_command(struct mly_softc *sc, struct mly_user_command *uc); 92 static int mly_user_health(struct mly_softc *sc, struct mly_user_health *uh); 93 94 #define MLY_CDEV_MAJOR 158 95 96 static struct cdevsw mly_cdevsw = { 97 mly_user_open, 98 mly_user_close, 99 noread, 100 nowrite, 101 mly_user_ioctl, 102 nopoll, 103 nommap, 104 nostrategy, 105 "mly", 106 MLY_CDEV_MAJOR, 107 nodump, 108 nopsize, 109 0, 110 -1 111 }; 112 113 /******************************************************************************** 114 ******************************************************************************** 115 Device Interface 116 ******************************************************************************** 117 ********************************************************************************/ 118 119 /******************************************************************************** 120 * Initialise the controller and softc 121 */ 122 int 123 mly_attach(struct mly_softc *sc) 124 { 125 int error; 126 127 debug_called(1); 128 129 /* 130 * Initialise per-controller queues. 131 */ 132 mly_initq_free(sc); 133 mly_initq_ready(sc); 134 mly_initq_busy(sc); 135 mly_initq_complete(sc); 136 137 #if __FreeBSD_version >= 500005 138 /* 139 * Initialise command-completion task. 140 */ 141 TASK_INIT(&sc->mly_task_complete, 0, mly_complete, sc); 142 #endif 143 144 /* disable interrupts before we start talking to the controller */ 145 MLY_MASK_INTERRUPTS(sc); 146 147 /* 148 * Wait for the controller to come ready, handshake with the firmware if required. 149 * This is typically only necessary on platforms where the controller BIOS does not 150 * run. 151 */ 152 if ((error = mly_fwhandshake(sc))) 153 return(error); 154 155 /* 156 * Allocate command buffers 157 */ 158 if ((error = mly_alloc_commands(sc))) 159 return(error); 160 161 /* 162 * Obtain controller feature information 163 */ 164 if ((error = mly_get_controllerinfo(sc))) 165 return(error); 166 167 /* 168 * Get the current event counter for health purposes, populate the initial 169 * health status buffer. 170 */ 171 if ((error = mly_get_eventstatus(sc))) 172 return(error); 173 174 /* 175 * Enable memory-mailbox mode 176 */ 177 if ((error = mly_enable_mmbox(sc))) 178 return(error); 179 180 /* 181 * Attach to CAM. 182 */ 183 if ((error = mly_cam_attach(sc))) 184 return(error); 185 186 /* 187 * Print a little information about the controller 188 */ 189 mly_describe_controller(sc); 190 191 /* 192 * Mark all attached devices for rescan 193 */ 194 mly_scan_devices(sc); 195 196 /* 197 * Instigate the first status poll immediately. Rescan completions won't 198 * happen until interrupts are enabled, which should still be before 199 * the SCSI subsystem gets to us. (XXX assuming CAM and interrupt-driven 200 * discovery here...) 201 */ 202 mly_periodic((void *)sc); 203 204 /* 205 * Create the control device. 206 */ 207 sc->mly_dev_t = make_dev(&mly_cdevsw, device_get_unit(sc->mly_dev), UID_ROOT, GID_OPERATOR, 208 S_IRUSR | S_IWUSR, "mly%d", device_get_unit(sc->mly_dev)); 209 sc->mly_dev_t->si_drv1 = sc; 210 211 /* enable interrupts now */ 212 MLY_UNMASK_INTERRUPTS(sc); 213 214 return(0); 215 } 216 217 /******************************************************************************** 218 * Bring the controller to a state where it can be safely left alone. 219 */ 220 void 221 mly_detach(struct mly_softc *sc) 222 { 223 224 debug_called(1); 225 226 /* kill the periodic event */ 227 untimeout(mly_periodic, sc, sc->mly_periodic); 228 229 sc->mly_state |= MLY_STATE_SUSPEND; 230 231 /* flush controller */ 232 mly_printf(sc, "flushing cache..."); 233 printf("%s\n", mly_flush(sc) ? "failed" : "done"); 234 235 MLY_MASK_INTERRUPTS(sc); 236 } 237 238 /******************************************************************************** 239 ******************************************************************************** 240 Command Wrappers 241 ******************************************************************************** 242 ********************************************************************************/ 243 244 /******************************************************************************** 245 * Fill in the mly_controllerinfo and mly_controllerparam fields in the softc. 246 */ 247 static int 248 mly_get_controllerinfo(struct mly_softc *sc) 249 { 250 struct mly_command_ioctl mci; 251 u_int8_t status; 252 int error; 253 254 debug_called(1); 255 256 if (sc->mly_controllerinfo != NULL) 257 free(sc->mly_controllerinfo, M_DEVBUF); 258 259 /* build the getcontrollerinfo ioctl and send it */ 260 bzero(&mci, sizeof(mci)); 261 sc->mly_controllerinfo = NULL; 262 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERINFO; 263 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerinfo, sizeof(*sc->mly_controllerinfo), 264 &status, NULL, NULL))) 265 return(error); 266 if (status != 0) 267 return(EIO); 268 269 if (sc->mly_controllerparam != NULL) 270 free(sc->mly_controllerparam, M_DEVBUF); 271 272 /* build the getcontrollerparameter ioctl and send it */ 273 bzero(&mci, sizeof(mci)); 274 sc->mly_controllerparam = NULL; 275 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERPARAMETER; 276 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerparam, sizeof(*sc->mly_controllerparam), 277 &status, NULL, NULL))) 278 return(error); 279 if (status != 0) 280 return(EIO); 281 282 return(0); 283 } 284 285 /******************************************************************************** 286 * Schedule all possible devices for a rescan. 287 * 288 */ 289 static void 290 mly_scan_devices(struct mly_softc *sc) 291 { 292 int bus, target, nchn; 293 294 debug_called(1); 295 296 /* 297 * Clear any previous BTL information. 298 */ 299 bzero(&sc->mly_btl, sizeof(sc->mly_btl)); 300 301 /* 302 * Mark all devices as requiring a rescan, and let the early periodic scan collect them. 303 */ 304 nchn = sc->mly_controllerinfo->physical_channels_present + 305 sc->mly_controllerinfo->virtual_channels_present; 306 for (bus = 0; bus < nchn; bus++) 307 for (target = 0; target < MLY_MAX_TARGETS; target++) 308 sc->mly_btl[bus][target].mb_flags = MLY_BTL_RESCAN; 309 310 } 311 312 /******************************************************************************** 313 * Rescan a device, possibly as a consequence of getting an event which suggests 314 * that it may have changed. 315 */ 316 static void 317 mly_rescan_btl(struct mly_softc *sc, int bus, int target) 318 { 319 struct mly_command *mc; 320 struct mly_command_ioctl *mci; 321 322 debug_called(2); 323 324 /* get a command */ 325 mc = NULL; 326 if (mly_alloc_command(sc, &mc)) 327 return; /* we'll be retried soon */ 328 329 /* set up the data buffer */ 330 if ((mc->mc_data = malloc(sizeof(union mly_devinfo), M_DEVBUF, M_NOWAIT)) == NULL) { 331 mly_release_command(mc); 332 return; /* we'll get retried the next time a command completes */ 333 } 334 bzero(mc->mc_data, sizeof(union mly_devinfo)); 335 mc->mc_flags |= MLY_CMD_DATAIN; 336 mc->mc_complete = mly_complete_rescan; 337 338 sc->mly_btl[bus][target].mb_flags &= ~MLY_BTL_RESCAN; 339 340 /* 341 * Build the ioctl. 342 * 343 * At this point we are committed to sending this request, as it 344 * will be the only one constructed for this particular update. 345 */ 346 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl; 347 mci->opcode = MDACMD_IOCTL; 348 mci->addr.phys.controller = 0; 349 mci->timeout.value = 30; 350 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 351 if (bus >= sc->mly_controllerinfo->physical_channels_present) { 352 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getlogdevinfovalid); 353 mci->sub_ioctl = MDACIOCTL_GETLOGDEVINFOVALID; 354 mci->addr.log.logdev = ((bus - sc->mly_controllerinfo->physical_channels_present) * MLY_MAX_TARGETS) 355 + target; 356 debug(2, "logical device %d", mci->addr.log.logdev); 357 } else { 358 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getphysdevinfovalid); 359 mci->sub_ioctl = MDACIOCTL_GETPHYSDEVINFOVALID; 360 mci->addr.phys.lun = 0; 361 mci->addr.phys.target = target; 362 mci->addr.phys.channel = bus; 363 debug(2, "physical device %d:%d", mci->addr.phys.channel, mci->addr.phys.target); 364 } 365 366 /* 367 * Use the ready queue to get this command dispatched. 368 */ 369 mly_enqueue_ready(mc); 370 mly_startio(sc); 371 } 372 373 /******************************************************************************** 374 * Handle the completion of a rescan operation 375 */ 376 static void 377 mly_complete_rescan(struct mly_command *mc) 378 { 379 struct mly_softc *sc = mc->mc_sc; 380 struct mly_ioctl_getlogdevinfovalid *ldi; 381 struct mly_ioctl_getphysdevinfovalid *pdi; 382 int bus, target; 383 384 debug_called(2); 385 386 /* iff the command completed OK, we should use the result to update our data */ 387 if (mc->mc_status == 0) { 388 if (mc->mc_length == sizeof(*ldi)) { 389 ldi = (struct mly_ioctl_getlogdevinfovalid *)mc->mc_data; 390 bus = MLY_LOGDEV_BUS(sc, ldi->logical_device_number); 391 target = MLY_LOGDEV_TARGET(ldi->logical_device_number); 392 sc->mly_btl[bus][target].mb_flags = MLY_BTL_LOGICAL; /* clears all other flags */ 393 sc->mly_btl[bus][target].mb_type = ldi->raid_level; 394 sc->mly_btl[bus][target].mb_state = ldi->state; 395 debug(2, "BTL rescan for %d returns %s, %s", ldi->logical_device_number, 396 mly_describe_code(mly_table_device_type, ldi->raid_level), 397 mly_describe_code(mly_table_device_state, ldi->state)); 398 } else if (mc->mc_length == sizeof(*pdi)) { 399 pdi = (struct mly_ioctl_getphysdevinfovalid *)mc->mc_data; 400 bus = pdi->channel; 401 target = pdi->target; 402 sc->mly_btl[bus][target].mb_flags = MLY_BTL_PHYSICAL; /* clears all other flags */ 403 sc->mly_btl[bus][target].mb_type = MLY_DEVICE_TYPE_PHYSICAL; 404 sc->mly_btl[bus][target].mb_state = pdi->state; 405 sc->mly_btl[bus][target].mb_speed = pdi->speed; 406 sc->mly_btl[bus][target].mb_width = pdi->width; 407 if (pdi->state != MLY_DEVICE_STATE_UNCONFIGURED) 408 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_PROTECTED; 409 debug(2, "BTL rescan for %d:%d returns %s", bus, target, 410 mly_describe_code(mly_table_device_state, pdi->state)); 411 } else { 412 mly_printf(sc, "BTL rescan result corrupted\n"); 413 } 414 } else { 415 /* 416 * A request sent for a device beyond the last device present will fail. 417 * We don't care about this, so we do nothing about it. 418 */ 419 } 420 free(mc->mc_data, M_DEVBUF); 421 mly_release_command(mc); 422 } 423 424 /******************************************************************************** 425 * Get the current health status and set the 'next event' counter to suit. 426 */ 427 static int 428 mly_get_eventstatus(struct mly_softc *sc) 429 { 430 struct mly_command_ioctl mci; 431 struct mly_health_status *mh; 432 u_int8_t status; 433 int error; 434 435 /* build the gethealthstatus ioctl and send it */ 436 bzero(&mci, sizeof(mci)); 437 mh = NULL; 438 mci.sub_ioctl = MDACIOCTL_GETHEALTHSTATUS; 439 440 if ((error = mly_ioctl(sc, &mci, (void **)&mh, sizeof(*mh), &status, NULL, NULL))) 441 return(error); 442 if (status != 0) 443 return(EIO); 444 445 /* get the event counter */ 446 sc->mly_event_change = mh->change_counter; 447 sc->mly_event_waiting = mh->next_event; 448 sc->mly_event_counter = mh->next_event; 449 450 /* save the health status into the memory mailbox */ 451 bcopy(mh, &sc->mly_mmbox->mmm_health.status, sizeof(*mh)); 452 453 debug(1, "initial change counter %d, event counter %d", mh->change_counter, mh->next_event); 454 455 free(mh, M_DEVBUF); 456 return(0); 457 } 458 459 /******************************************************************************** 460 * Enable the memory mailbox mode. 461 */ 462 static int 463 mly_enable_mmbox(struct mly_softc *sc) 464 { 465 struct mly_command_ioctl mci; 466 u_int8_t *sp, status; 467 int error; 468 469 debug_called(1); 470 471 /* build the ioctl and send it */ 472 bzero(&mci, sizeof(mci)); 473 mci.sub_ioctl = MDACIOCTL_SETMEMORYMAILBOX; 474 /* set buffer addresses */ 475 mci.param.setmemorymailbox.command_mailbox_physaddr = 476 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_command); 477 mci.param.setmemorymailbox.status_mailbox_physaddr = 478 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_status); 479 mci.param.setmemorymailbox.health_buffer_physaddr = 480 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_health); 481 482 /* set buffer sizes - abuse of data_size field is revolting */ 483 sp = (u_int8_t *)&mci.data_size; 484 sp[0] = ((sizeof(union mly_command_packet) * MLY_MMBOX_COMMANDS) / 1024); 485 sp[1] = (sizeof(union mly_status_packet) * MLY_MMBOX_STATUS) / 1024; 486 mci.param.setmemorymailbox.health_buffer_size = sizeof(union mly_health_region) / 1024; 487 488 debug(1, "memory mailbox at %p (0x%llx/%d 0x%llx/%d 0x%llx/%d", sc->mly_mmbox, 489 mci.param.setmemorymailbox.command_mailbox_physaddr, sp[0], 490 mci.param.setmemorymailbox.status_mailbox_physaddr, sp[1], 491 mci.param.setmemorymailbox.health_buffer_physaddr, 492 mci.param.setmemorymailbox.health_buffer_size); 493 494 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL))) 495 return(error); 496 if (status != 0) 497 return(EIO); 498 sc->mly_state |= MLY_STATE_MMBOX_ACTIVE; 499 debug(1, "memory mailbox active"); 500 return(0); 501 } 502 503 /******************************************************************************** 504 * Flush all pending I/O from the controller. 505 */ 506 static int 507 mly_flush(struct mly_softc *sc) 508 { 509 struct mly_command_ioctl mci; 510 u_int8_t status; 511 int error; 512 513 debug_called(1); 514 515 /* build the ioctl */ 516 bzero(&mci, sizeof(mci)); 517 mci.sub_ioctl = MDACIOCTL_FLUSHDEVICEDATA; 518 mci.param.deviceoperation.operation_device = MLY_OPDEVICE_PHYSICAL_CONTROLLER; 519 520 /* pass it off to the controller */ 521 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL))) 522 return(error); 523 524 return((status == 0) ? 0 : EIO); 525 } 526 527 /******************************************************************************** 528 * Perform an ioctl command. 529 * 530 * If (data) is not NULL, the command requires data transfer. If (*data) is NULL 531 * the command requires data transfer from the controller, and we will allocate 532 * a buffer for it. If (*data) is not NULL, the command requires data transfer 533 * to the controller. 534 * 535 * XXX passing in the whole ioctl structure is ugly. Better ideas? 536 * 537 * XXX we don't even try to handle the case where datasize > 4k. We should. 538 */ 539 static int 540 mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, size_t datasize, 541 u_int8_t *status, void *sense_buffer, size_t *sense_length) 542 { 543 struct mly_command *mc; 544 struct mly_command_ioctl *mci; 545 int error; 546 547 debug_called(1); 548 549 mc = NULL; 550 if (mly_alloc_command(sc, &mc)) { 551 error = ENOMEM; 552 goto out; 553 } 554 555 /* copy the ioctl structure, but save some important fields and then fixup */ 556 mci = &mc->mc_packet->ioctl; 557 ioctl->sense_buffer_address = mci->sense_buffer_address; 558 ioctl->maximum_sense_size = mci->maximum_sense_size; 559 *mci = *ioctl; 560 mci->opcode = MDACMD_IOCTL; 561 mci->timeout.value = 30; 562 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 563 564 /* handle the data buffer */ 565 if (data != NULL) { 566 if (*data == NULL) { 567 /* allocate data buffer */ 568 if ((mc->mc_data = malloc(datasize, M_DEVBUF, M_NOWAIT)) == NULL) { 569 error = ENOMEM; 570 goto out; 571 } 572 mc->mc_flags |= MLY_CMD_DATAIN; 573 } else { 574 mc->mc_data = *data; 575 mc->mc_flags |= MLY_CMD_DATAOUT; 576 } 577 mc->mc_length = datasize; 578 mc->mc_packet->generic.data_size = datasize; 579 } 580 581 /* run the command */ 582 if ((error = mly_immediate_command(mc))) 583 goto out; 584 585 /* clean up and return any data */ 586 *status = mc->mc_status; 587 if ((mc->mc_sense > 0) && (sense_buffer != NULL)) { 588 bcopy(mc->mc_packet, sense_buffer, mc->mc_sense); 589 *sense_length = mc->mc_sense; 590 goto out; 591 } 592 593 /* should we return a data pointer? */ 594 if ((data != NULL) && (*data == NULL)) 595 *data = mc->mc_data; 596 597 /* command completed OK */ 598 error = 0; 599 600 out: 601 if (mc != NULL) { 602 /* do we need to free a data buffer we allocated? */ 603 if (error && (mc->mc_data != NULL) && (*data == NULL)) 604 free(mc->mc_data, M_DEVBUF); 605 mly_release_command(mc); 606 } 607 return(error); 608 } 609 610 /******************************************************************************** 611 * Fetch one event from the controller. 612 */ 613 static void 614 mly_fetch_event(struct mly_softc *sc) 615 { 616 struct mly_command *mc; 617 struct mly_command_ioctl *mci; 618 int s; 619 u_int32_t event; 620 621 debug_called(2); 622 623 /* get a command */ 624 mc = NULL; 625 if (mly_alloc_command(sc, &mc)) 626 return; /* we'll get retried the next time a command completes */ 627 628 /* set up the data buffer */ 629 if ((mc->mc_data = malloc(sizeof(struct mly_event), M_DEVBUF, M_NOWAIT)) == NULL) { 630 mly_release_command(mc); 631 return; /* we'll get retried the next time a command completes */ 632 } 633 bzero(mc->mc_data, sizeof(struct mly_event)); 634 mc->mc_length = sizeof(struct mly_event); 635 mc->mc_flags |= MLY_CMD_DATAIN; 636 mc->mc_complete = mly_complete_event; 637 638 /* 639 * Get an event number to fetch. It's possible that we've raced with another 640 * context for the last event, in which case there will be no more events. 641 */ 642 s = splcam(); 643 if (sc->mly_event_counter == sc->mly_event_waiting) { 644 mly_release_command(mc); 645 splx(s); 646 return; 647 } 648 event = sc->mly_event_counter++; 649 splx(s); 650 651 /* 652 * Build the ioctl. 653 * 654 * At this point we are committed to sending this request, as it 655 * will be the only one constructed for this particular event number. 656 */ 657 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl; 658 mci->opcode = MDACMD_IOCTL; 659 mci->data_size = sizeof(struct mly_event); 660 mci->addr.phys.lun = (event >> 16) & 0xff; 661 mci->addr.phys.target = (event >> 24) & 0xff; 662 mci->addr.phys.channel = 0; 663 mci->addr.phys.controller = 0; 664 mci->timeout.value = 30; 665 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 666 mci->sub_ioctl = MDACIOCTL_GETEVENT; 667 mci->param.getevent.sequence_number_low = event & 0xffff; 668 669 debug(2, "fetch event %u", event); 670 671 /* 672 * Use the ready queue to get this command dispatched. 673 */ 674 mly_enqueue_ready(mc); 675 mly_startio(sc); 676 } 677 678 /******************************************************************************** 679 * Handle the completion of an event poll. 680 * 681 * Note that we don't actually have to instigate another poll; the completion of 682 * this command will trigger that if there are any more events to poll for. 683 */ 684 static void 685 mly_complete_event(struct mly_command *mc) 686 { 687 struct mly_softc *sc = mc->mc_sc; 688 struct mly_event *me = (struct mly_event *)mc->mc_data; 689 690 debug_called(2); 691 692 /* 693 * If the event was successfully fetched, process it. 694 */ 695 if (mc->mc_status == SCSI_STATUS_OK) { 696 mly_process_event(sc, me); 697 free(me, M_DEVBUF); 698 } 699 mly_release_command(mc); 700 } 701 702 /******************************************************************************** 703 * Process a controller event. 704 */ 705 static void 706 mly_process_event(struct mly_softc *sc, struct mly_event *me) 707 { 708 struct scsi_sense_data *ssd = (struct scsi_sense_data *)&me->sense[0]; 709 char *fp, *tp; 710 int bus, target, event, class, action; 711 712 /* 713 * Errors can be reported using vendor-unique sense data. In this case, the 714 * event code will be 0x1c (Request sense data present), the sense key will 715 * be 0x09 (vendor specific), the MSB of the ASC will be set, and the 716 * actual event code will be a 16-bit value comprised of the ASCQ (low byte) 717 * and low seven bits of the ASC (low seven bits of the high byte). 718 */ 719 if ((me->code == 0x1c) && 720 ((ssd->flags & SSD_KEY) == SSD_KEY_Vendor_Specific) && 721 (ssd->add_sense_code & 0x80)) { 722 event = ((int)(ssd->add_sense_code & ~0x80) << 8) + ssd->add_sense_code_qual; 723 } else { 724 event = me->code; 725 } 726 727 /* look up event, get codes */ 728 fp = mly_describe_code(mly_table_event, event); 729 730 debug(2, "Event %d code 0x%x", me->sequence_number, me->code); 731 732 /* quiet event? */ 733 class = fp[0]; 734 if (isupper(class) && bootverbose) 735 class = tolower(class); 736 737 /* get action code, text string */ 738 action = fp[1]; 739 tp = &fp[2]; 740 741 /* 742 * Print some information about the event. 743 * 744 * This code uses a table derived from the corresponding portion of the Linux 745 * driver, and thus the parser is very similar. 746 */ 747 switch(class) { 748 case 'p': /* error on physical device */ 749 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp); 750 if (action == 'r') 751 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN; 752 break; 753 case 'l': /* error on logical unit */ 754 case 'm': /* message about logical unit */ 755 bus = MLY_LOGDEV_BUS(sc, me->lun); 756 target = MLY_LOGDEV_TARGET(me->lun); 757 mly_name_device(sc, bus, target); 758 mly_printf(sc, "logical device %d (%s) %s\n", me->lun, sc->mly_btl[bus][target].mb_name, tp); 759 if (action == 'r') 760 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_RESCAN; 761 break; 762 break; 763 case 's': /* report of sense data */ 764 if (((ssd->flags & SSD_KEY) == SSD_KEY_NO_SENSE) || 765 (((ssd->flags & SSD_KEY) == SSD_KEY_NOT_READY) && 766 (ssd->add_sense_code == 0x04) && 767 ((ssd->add_sense_code_qual == 0x01) || (ssd->add_sense_code_qual == 0x02)))) 768 break; /* ignore NO_SENSE or NOT_READY in one case */ 769 770 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp); 771 mly_printf(sc, " sense key %d asc %02x ascq %02x\n", 772 ssd->flags & SSD_KEY, ssd->add_sense_code, ssd->add_sense_code_qual); 773 mly_printf(sc, " info %4D csi %4D\n", ssd->info, "", ssd->cmd_spec_info, ""); 774 if (action == 'r') 775 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN; 776 break; 777 case 'e': 778 mly_printf(sc, tp, me->target, me->lun); 779 break; 780 case 'c': 781 mly_printf(sc, "controller %s\n", tp); 782 break; 783 case '?': 784 mly_printf(sc, "%s - %d\n", tp, me->code); 785 break; 786 default: /* probably a 'noisy' event being ignored */ 787 break; 788 } 789 } 790 791 /******************************************************************************** 792 * Perform periodic activities. 793 */ 794 static void 795 mly_periodic(void *data) 796 { 797 struct mly_softc *sc = (struct mly_softc *)data; 798 int nchn, bus, target; 799 800 debug_called(2); 801 802 /* 803 * Scan devices. 804 */ 805 nchn = sc->mly_controllerinfo->physical_channels_present + 806 sc->mly_controllerinfo->virtual_channels_present; 807 for (bus = 0; bus < nchn; bus++) { 808 for (target = 0; target < MLY_MAX_TARGETS; target++) { 809 810 /* ignore the controller in this scan */ 811 if (target == sc->mly_controllerparam->initiator_id) 812 continue; 813 814 /* perform device rescan? */ 815 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_RESCAN) 816 mly_rescan_btl(sc, bus, target); 817 } 818 } 819 820 sc->mly_periodic = timeout(mly_periodic, sc, hz); 821 } 822 823 /******************************************************************************** 824 ******************************************************************************** 825 Command Processing 826 ******************************************************************************** 827 ********************************************************************************/ 828 829 /******************************************************************************** 830 * Run a command and wait for it to complete. 831 * 832 */ 833 static int 834 mly_immediate_command(struct mly_command *mc) 835 { 836 struct mly_softc *sc = mc->mc_sc; 837 int error, s; 838 839 debug_called(2); 840 841 /* spinning at splcam is ugly, but we're only used during controller init */ 842 s = splcam(); 843 if ((error = mly_start(mc))) 844 return(error); 845 846 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) { 847 /* sleep on the command */ 848 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) { 849 tsleep(mc, PRIBIO, "mlywait", 0); 850 } 851 } else { 852 /* spin and collect status while we do */ 853 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) { 854 mly_done(mc->mc_sc); 855 } 856 } 857 splx(s); 858 return(0); 859 } 860 861 /******************************************************************************** 862 * Start as much queued I/O as possible on the controller 863 */ 864 void 865 mly_startio(struct mly_softc *sc) 866 { 867 struct mly_command *mc; 868 869 debug_called(2); 870 871 for (;;) { 872 873 /* try for a ready command */ 874 mc = mly_dequeue_ready(sc); 875 876 /* try to build a command from a queued ccb */ 877 if (!mc) 878 mly_cam_command(sc, &mc); 879 880 /* no command == nothing to do */ 881 if (!mc) 882 break; 883 884 /* try to post the command */ 885 if (mly_start(mc)) { 886 /* controller busy, or no resources - defer for later */ 887 mly_requeue_ready(mc); 888 break; 889 } 890 } 891 } 892 893 /******************************************************************************** 894 * Deliver a command to the controller; allocate controller resources at the 895 * last moment. 896 */ 897 static int 898 mly_start(struct mly_command *mc) 899 { 900 struct mly_softc *sc = mc->mc_sc; 901 union mly_command_packet *pkt; 902 int s; 903 904 debug_called(2); 905 906 /* 907 * Set the command up for delivery to the controller. 908 */ 909 mly_map_command(mc); 910 mc->mc_packet->generic.command_id = mc->mc_slot; 911 912 s = splcam(); 913 914 /* 915 * Do we have to use the hardware mailbox? 916 */ 917 if (!(sc->mly_state & MLY_STATE_MMBOX_ACTIVE)) { 918 /* 919 * Check to see if the controller is ready for us. 920 */ 921 if (MLY_IDBR_TRUE(sc, MLY_HM_CMDSENT)) { 922 splx(s); 923 return(EBUSY); 924 } 925 mc->mc_flags |= MLY_CMD_BUSY; 926 927 /* 928 * It's ready, send the command. 929 */ 930 MLY_SET_MBOX(sc, sc->mly_command_mailbox, &mc->mc_packetphys); 931 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_CMDSENT); 932 933 } else { /* use memory-mailbox mode */ 934 935 pkt = &sc->mly_mmbox->mmm_command[sc->mly_mmbox_command_index]; 936 937 /* check to see if the next index is free yet */ 938 if (pkt->mmbox.flag != 0) { 939 splx(s); 940 return(EBUSY); 941 } 942 mc->mc_flags |= MLY_CMD_BUSY; 943 944 /* copy in new command */ 945 bcopy(mc->mc_packet->mmbox.data, pkt->mmbox.data, sizeof(pkt->mmbox.data)); 946 /* barrier to ensure completion of previous write before we write the flag */ 947 bus_space_barrier(NULL, NULL, 0, 0, BUS_SPACE_BARRIER_WRITE); /* tag/handle? */ 948 /* copy flag last */ 949 pkt->mmbox.flag = mc->mc_packet->mmbox.flag; 950 /* barrier to ensure completion of previous write before we notify the controller */ 951 bus_space_barrier(NULL, NULL, 0, 0, BUS_SPACE_BARRIER_WRITE); /* tag/handle */ 952 953 /* signal controller, update index */ 954 MLY_SET_REG(sc, sc->mly_idbr, MLY_AM_CMDSENT); 955 sc->mly_mmbox_command_index = (sc->mly_mmbox_command_index + 1) % MLY_MMBOX_COMMANDS; 956 } 957 958 mly_enqueue_busy(mc); 959 splx(s); 960 return(0); 961 } 962 963 /******************************************************************************** 964 * Pick up command status from the controller, schedule a completion event 965 */ 966 void 967 mly_done(struct mly_softc *sc) 968 { 969 struct mly_command *mc; 970 union mly_status_packet *sp; 971 u_int16_t slot; 972 int s, worked; 973 974 s = splcam(); 975 worked = 0; 976 977 /* pick up hardware-mailbox commands */ 978 if (MLY_ODBR_TRUE(sc, MLY_HM_STSREADY)) { 979 slot = MLY_GET_REG2(sc, sc->mly_status_mailbox); 980 if (slot < MLY_SLOT_MAX) { 981 mc = &sc->mly_command[slot - MLY_SLOT_START]; 982 mc->mc_status = MLY_GET_REG(sc, sc->mly_status_mailbox + 2); 983 mc->mc_sense = MLY_GET_REG(sc, sc->mly_status_mailbox + 3); 984 mc->mc_resid = MLY_GET_REG4(sc, sc->mly_status_mailbox + 4); 985 mly_remove_busy(mc); 986 mc->mc_flags &= ~MLY_CMD_BUSY; 987 mly_enqueue_complete(mc); 988 worked = 1; 989 } else { 990 /* slot 0xffff may mean "extremely bogus command" */ 991 mly_printf(sc, "got HM completion for illegal slot %u\n", slot); 992 } 993 /* unconditionally acknowledge status */ 994 MLY_SET_REG(sc, sc->mly_odbr, MLY_HM_STSREADY); 995 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 996 } 997 998 /* pick up memory-mailbox commands */ 999 if (MLY_ODBR_TRUE(sc, MLY_AM_STSREADY)) { 1000 for (;;) { 1001 sp = &sc->mly_mmbox->mmm_status[sc->mly_mmbox_status_index]; 1002 1003 /* check for more status */ 1004 if (sp->mmbox.flag == 0) 1005 break; 1006 1007 /* get slot number */ 1008 slot = sp->status.command_id; 1009 if (slot < MLY_SLOT_MAX) { 1010 mc = &sc->mly_command[slot - MLY_SLOT_START]; 1011 mc->mc_status = sp->status.status; 1012 mc->mc_sense = sp->status.sense_length; 1013 mc->mc_resid = sp->status.residue; 1014 mly_remove_busy(mc); 1015 mc->mc_flags &= ~MLY_CMD_BUSY; 1016 mly_enqueue_complete(mc); 1017 worked = 1; 1018 } else { 1019 /* slot 0xffff may mean "extremely bogus command" */ 1020 mly_printf(sc, "got AM completion for illegal slot %u at %d\n", 1021 slot, sc->mly_mmbox_status_index); 1022 } 1023 1024 /* clear and move to next index */ 1025 sp->mmbox.flag = 0; 1026 sc->mly_mmbox_status_index = (sc->mly_mmbox_status_index + 1) % MLY_MMBOX_STATUS; 1027 } 1028 /* acknowledge that we have collected status value(s) */ 1029 MLY_SET_REG(sc, sc->mly_odbr, MLY_AM_STSREADY); 1030 } 1031 1032 splx(s); 1033 if (worked) { 1034 #if __FreeBSD_version >= 500005 1035 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) 1036 taskqueue_enqueue(taskqueue_swi, &sc->mly_task_complete); 1037 else 1038 #endif 1039 mly_complete(sc, 0); 1040 } 1041 } 1042 1043 /******************************************************************************** 1044 * Process completed commands 1045 */ 1046 static void 1047 mly_complete(void *context, int pending) 1048 { 1049 struct mly_softc *sc = (struct mly_softc *)context; 1050 struct mly_command *mc; 1051 void (* mc_complete)(struct mly_command *mc); 1052 1053 1054 debug_called(2); 1055 1056 /* 1057 * Spin pulling commands off the completed queue and processing them. 1058 */ 1059 while ((mc = mly_dequeue_complete(sc)) != NULL) { 1060 1061 /* 1062 * Free controller resources, mark command complete. 1063 * 1064 * Note that as soon as we mark the command complete, it may be freed 1065 * out from under us, so we need to save the mc_complete field in 1066 * order to later avoid dereferencing mc. (We would not expect to 1067 * have a polling/sleeping consumer with mc_complete != NULL). 1068 */ 1069 mly_unmap_command(mc); 1070 mc_complete = mc->mc_complete; 1071 mc->mc_flags |= MLY_CMD_COMPLETE; 1072 1073 /* 1074 * Call completion handler or wake up sleeping consumer. 1075 */ 1076 if (mc_complete != NULL) { 1077 mc_complete(mc); 1078 } else { 1079 wakeup(mc); 1080 } 1081 } 1082 1083 /* 1084 * We may have freed up controller resources which would allow us 1085 * to push more commands onto the controller, so we check here. 1086 */ 1087 mly_startio(sc); 1088 1089 /* 1090 * The controller may have updated the health status information, 1091 * so check for it here. 1092 * 1093 * Note that we only check for health status after a completed command. It 1094 * might be wise to ping the controller occasionally if it's been idle for 1095 * a while just to check up on it. While a filesystem is mounted, or I/O is 1096 * active this isn't really an issue. 1097 */ 1098 if (sc->mly_mmbox->mmm_health.status.change_counter != sc->mly_event_change) { 1099 sc->mly_event_change = sc->mly_mmbox->mmm_health.status.change_counter; 1100 debug(1, "event change %d, event status update, %d -> %d", sc->mly_event_change, 1101 sc->mly_event_waiting, sc->mly_mmbox->mmm_health.status.next_event); 1102 sc->mly_event_waiting = sc->mly_mmbox->mmm_health.status.next_event; 1103 1104 /* wake up anyone that might be interested in this */ 1105 wakeup(&sc->mly_event_change); 1106 } 1107 if (sc->mly_event_counter != sc->mly_event_waiting) 1108 mly_fetch_event(sc); 1109 } 1110 1111 /******************************************************************************** 1112 ******************************************************************************** 1113 Command Buffer Management 1114 ******************************************************************************** 1115 ********************************************************************************/ 1116 1117 /******************************************************************************** 1118 * Allocate a command. 1119 */ 1120 int 1121 mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp) 1122 { 1123 struct mly_command *mc; 1124 1125 debug_called(3); 1126 1127 if ((mc = mly_dequeue_free(sc)) == NULL) 1128 return(ENOMEM); 1129 1130 *mcp = mc; 1131 return(0); 1132 } 1133 1134 /******************************************************************************** 1135 * Release a command back to the freelist. 1136 */ 1137 void 1138 mly_release_command(struct mly_command *mc) 1139 { 1140 debug_called(3); 1141 1142 /* 1143 * Fill in parts of the command that may cause confusion if 1144 * a consumer doesn't when we are later allocated. 1145 */ 1146 mc->mc_data = NULL; 1147 mc->mc_flags = 0; 1148 mc->mc_complete = NULL; 1149 mc->mc_private = NULL; 1150 1151 /* 1152 * By default, we set up to overwrite the command packet with 1153 * sense information. 1154 */ 1155 mc->mc_packet->generic.sense_buffer_address = mc->mc_packetphys; 1156 mc->mc_packet->generic.maximum_sense_size = sizeof(union mly_command_packet); 1157 1158 mly_enqueue_free(mc); 1159 } 1160 1161 /******************************************************************************** 1162 * Map helper for command allocation. 1163 */ 1164 static void 1165 mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1166 { 1167 struct mly_softc *sc = (struct mly_softc *)arg 1168 1169 debug_called(2); 1170 1171 sc->mly_packetphys = segs[0].ds_addr; 1172 } 1173 1174 /******************************************************************************** 1175 * Allocate and initialise command and packet structures. 1176 */ 1177 static int 1178 mly_alloc_commands(struct mly_softc *sc) 1179 { 1180 struct mly_command *mc; 1181 int i; 1182 1183 /* 1184 * Allocate enough space for all the command packets in one chunk and 1185 * map them permanently into controller-visible space. 1186 */ 1187 if (bus_dmamem_alloc(sc->mly_packet_dmat, (void **)&sc->mly_packet, 1188 BUS_DMA_NOWAIT, &sc->mly_packetmap)) { 1189 return(ENOMEM); 1190 } 1191 bus_dmamap_load(sc->mly_packet_dmat, sc->mly_packetmap, sc->mly_packet, 1192 MLY_MAXCOMMANDS * sizeof(union mly_command_packet), 1193 mly_alloc_commands_map, sc, 0); 1194 1195 for (i = 0; i < MLY_MAXCOMMANDS; i++) { 1196 mc = &sc->mly_command[i]; 1197 bzero(mc, sizeof(*mc)); 1198 mc->mc_sc = sc; 1199 mc->mc_slot = MLY_SLOT_START + i; 1200 mc->mc_packet = sc->mly_packet + i; 1201 mc->mc_packetphys = sc->mly_packetphys + (i * sizeof(union mly_command_packet)); 1202 if (!bus_dmamap_create(sc->mly_buffer_dmat, 0, &mc->mc_datamap)) 1203 mly_release_command(mc); 1204 } 1205 return(0); 1206 } 1207 1208 /******************************************************************************** 1209 * Command-mapping helper function - populate this command's s/g table 1210 * with the s/g entries for its data. 1211 */ 1212 static void 1213 mly_map_command_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1214 { 1215 struct mly_command *mc = (struct mly_command *)arg; 1216 struct mly_softc *sc = mc->mc_sc; 1217 struct mly_command_generic *gen = &(mc->mc_packet->generic); 1218 struct mly_sg_entry *sg; 1219 int i, tabofs; 1220 1221 debug_called(3); 1222 1223 /* can we use the transfer structure directly? */ 1224 if (nseg <= 2) { 1225 sg = &gen->transfer.direct.sg[0]; 1226 gen->command_control.extended_sg_table = 0; 1227 } else { 1228 tabofs = ((mc->mc_slot - MLY_SLOT_START) * MLY_MAXSGENTRIES); 1229 sg = sc->mly_sg_table + tabofs; 1230 gen->transfer.indirect.entries[0] = nseg; 1231 gen->transfer.indirect.table_physaddr[0] = sc->mly_sg_busaddr + (tabofs * sizeof(struct mly_sg_entry)); 1232 gen->command_control.extended_sg_table = 1; 1233 } 1234 1235 /* copy the s/g table */ 1236 for (i = 0; i < nseg; i++) { 1237 sg[i].physaddr = segs[i].ds_addr; 1238 sg[i].length = segs[i].ds_len; 1239 } 1240 1241 } 1242 1243 #if 0 1244 /******************************************************************************** 1245 * Command-mapping helper function - save the cdb's physical address. 1246 * 1247 * We don't support 'large' SCSI commands at this time, so this is unused. 1248 */ 1249 static void 1250 mly_map_command_cdb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1251 { 1252 struct mly_command *mc = (struct mly_command *)arg; 1253 1254 debug_called(3); 1255 1256 /* XXX can we safely assume that a CDB will never cross a page boundary? */ 1257 if ((segs[0].ds_addr % PAGE_SIZE) > 1258 ((segs[0].ds_addr + mc->mc_packet->scsi_large.cdb_length) % PAGE_SIZE)) 1259 panic("cdb crosses page boundary"); 1260 1261 /* fix up fields in the command packet */ 1262 mc->mc_packet->scsi_large.cdb_physaddr = segs[0].ds_addr; 1263 } 1264 #endif 1265 1266 /******************************************************************************** 1267 * Map a command into controller-visible space 1268 */ 1269 static void 1270 mly_map_command(struct mly_command *mc) 1271 { 1272 struct mly_softc *sc = mc->mc_sc; 1273 1274 debug_called(2); 1275 1276 /* don't map more than once */ 1277 if (mc->mc_flags & MLY_CMD_MAPPED) 1278 return; 1279 1280 /* does the command have a data buffer? */ 1281 if (mc->mc_data != NULL) 1282 bus_dmamap_load(sc->mly_buffer_dmat, mc->mc_datamap, mc->mc_data, mc->mc_length, 1283 mly_map_command_sg, mc, 0); 1284 1285 if (mc->mc_flags & MLY_CMD_DATAIN) 1286 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREREAD); 1287 if (mc->mc_flags & MLY_CMD_DATAOUT) 1288 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREWRITE); 1289 1290 mc->mc_flags |= MLY_CMD_MAPPED; 1291 } 1292 1293 /******************************************************************************** 1294 * Unmap a command from controller-visible space 1295 */ 1296 static void 1297 mly_unmap_command(struct mly_command *mc) 1298 { 1299 struct mly_softc *sc = mc->mc_sc; 1300 1301 debug_called(2); 1302 1303 if (!(mc->mc_flags & MLY_CMD_MAPPED)) 1304 return; 1305 1306 if (mc->mc_flags & MLY_CMD_DATAIN) 1307 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTREAD); 1308 if (mc->mc_flags & MLY_CMD_DATAOUT) 1309 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTWRITE); 1310 1311 /* does the command have a data buffer? */ 1312 if (mc->mc_data != NULL) 1313 bus_dmamap_unload(sc->mly_buffer_dmat, mc->mc_datamap); 1314 1315 mc->mc_flags &= ~MLY_CMD_MAPPED; 1316 } 1317 1318 /******************************************************************************** 1319 ******************************************************************************** 1320 Hardware Control 1321 ******************************************************************************** 1322 ********************************************************************************/ 1323 1324 /******************************************************************************** 1325 * Handshake with the firmware while the card is being initialised. 1326 */ 1327 static int 1328 mly_fwhandshake(struct mly_softc *sc) 1329 { 1330 u_int8_t error, param0, param1; 1331 int spinup = 0; 1332 1333 debug_called(1); 1334 1335 /* set HM_STSACK and let the firmware initialise */ 1336 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 1337 DELAY(1000); /* too short? */ 1338 1339 /* if HM_STSACK is still true, the controller is initialising */ 1340 if (!MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) 1341 return(0); 1342 mly_printf(sc, "controller initialisation started\n"); 1343 1344 /* spin waiting for initialisation to finish, or for a message to be delivered */ 1345 while (MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) { 1346 /* check for a message */ 1347 if (MLY_ERROR_VALID(sc)) { 1348 error = MLY_GET_REG(sc, sc->mly_error_status) & ~MLY_MSG_EMPTY; 1349 param0 = MLY_GET_REG(sc, sc->mly_command_mailbox); 1350 param1 = MLY_GET_REG(sc, sc->mly_command_mailbox + 1); 1351 1352 switch(error) { 1353 case MLY_MSG_SPINUP: 1354 if (!spinup) { 1355 mly_printf(sc, "drive spinup in progress\n"); 1356 spinup = 1; /* only print this once (should print drive being spun?) */ 1357 } 1358 break; 1359 case MLY_MSG_RACE_RECOVERY_FAIL: 1360 mly_printf(sc, "mirror race recovery failed, one or more drives offline\n"); 1361 break; 1362 case MLY_MSG_RACE_IN_PROGRESS: 1363 mly_printf(sc, "mirror race recovery in progress\n"); 1364 break; 1365 case MLY_MSG_RACE_ON_CRITICAL: 1366 mly_printf(sc, "mirror race recovery on a critical drive\n"); 1367 break; 1368 case MLY_MSG_PARITY_ERROR: 1369 mly_printf(sc, "FATAL MEMORY PARITY ERROR\n"); 1370 return(ENXIO); 1371 default: 1372 mly_printf(sc, "unknown initialisation code 0x%x\n", error); 1373 } 1374 } 1375 } 1376 return(0); 1377 } 1378 1379 /******************************************************************************** 1380 ******************************************************************************** 1381 Debugging and Diagnostics 1382 ******************************************************************************** 1383 ********************************************************************************/ 1384 1385 /******************************************************************************** 1386 * Print some information about the controller. 1387 */ 1388 static void 1389 mly_describe_controller(struct mly_softc *sc) 1390 { 1391 struct mly_ioctl_getcontrollerinfo *mi = sc->mly_controllerinfo; 1392 1393 mly_printf(sc, "%16s, %d channel%s, firmware %d.%02d-%d-%02d (%02d%02d%02d%02d), %dMB RAM\n", 1394 mi->controller_name, mi->physical_channels_present, (mi->physical_channels_present) > 1 ? "s" : "", 1395 mi->fw_major, mi->fw_minor, mi->fw_turn, mi->fw_build, /* XXX turn encoding? */ 1396 mi->fw_century, mi->fw_year, mi->fw_month, mi->fw_day, 1397 mi->memory_size); 1398 1399 if (bootverbose) { 1400 mly_printf(sc, "%s %s (%x), %dMHz %d-bit %.16s\n", 1401 mly_describe_code(mly_table_oemname, mi->oem_information), 1402 mly_describe_code(mly_table_controllertype, mi->controller_type), mi->controller_type, 1403 mi->interface_speed, mi->interface_width, mi->interface_name); 1404 mly_printf(sc, "%dMB %dMHz %d-bit %s%s%s, cache %dMB\n", 1405 mi->memory_size, mi->memory_speed, mi->memory_width, 1406 mly_describe_code(mly_table_memorytype, mi->memory_type), 1407 mi->memory_parity ? "+parity": "",mi->memory_ecc ? "+ECC": "", 1408 mi->cache_size); 1409 mly_printf(sc, "CPU: %s @ %dMHZ\n", 1410 mly_describe_code(mly_table_cputype, mi->cpu[0].type), mi->cpu[0].speed); 1411 if (mi->l2cache_size != 0) 1412 mly_printf(sc, "%dKB L2 cache\n", mi->l2cache_size); 1413 if (mi->exmemory_size != 0) 1414 mly_printf(sc, "%dMB %dMHz %d-bit private %s%s%s\n", 1415 mi->exmemory_size, mi->exmemory_speed, mi->exmemory_width, 1416 mly_describe_code(mly_table_memorytype, mi->exmemory_type), 1417 mi->exmemory_parity ? "+parity": "",mi->exmemory_ecc ? "+ECC": ""); 1418 mly_printf(sc, "battery backup %s\n", mi->bbu_present ? "present" : "not installed"); 1419 mly_printf(sc, "maximum data transfer %d blocks, maximum sg entries/command %d\n", 1420 mi->maximum_block_count, mi->maximum_sg_entries); 1421 mly_printf(sc, "logical devices present/critical/offline %d/%d/%d\n", 1422 mi->logical_devices_present, mi->logical_devices_critical, mi->logical_devices_offline); 1423 mly_printf(sc, "physical devices present %d\n", 1424 mi->physical_devices_present); 1425 mly_printf(sc, "physical disks present/offline %d/%d\n", 1426 mi->physical_disks_present, mi->physical_disks_offline); 1427 mly_printf(sc, "%d physical channel%s, %d virtual channel%s of %d possible\n", 1428 mi->physical_channels_present, mi->physical_channels_present == 1 ? "" : "s", 1429 mi->virtual_channels_present, mi->virtual_channels_present == 1 ? "" : "s", 1430 mi->virtual_channels_possible); 1431 mly_printf(sc, "%d parallel commands supported\n", mi->maximum_parallel_commands); 1432 mly_printf(sc, "%dMB flash ROM, %d of %d maximum cycles\n", 1433 mi->flash_size, mi->flash_age, mi->flash_maximum_age); 1434 } 1435 } 1436 1437 #ifdef MLY_DEBUG 1438 /******************************************************************************** 1439 * Print some controller state 1440 */ 1441 static void 1442 mly_printstate(struct mly_softc *sc) 1443 { 1444 mly_printf(sc, "IDBR %02x ODBR %02x ERROR %02x (%x %x %x)\n", 1445 MLY_GET_REG(sc, sc->mly_idbr), 1446 MLY_GET_REG(sc, sc->mly_odbr), 1447 MLY_GET_REG(sc, sc->mly_error_status), 1448 sc->mly_idbr, 1449 sc->mly_odbr, 1450 sc->mly_error_status); 1451 mly_printf(sc, "IMASK %02x ISTATUS %02x\n", 1452 MLY_GET_REG(sc, sc->mly_interrupt_mask), 1453 MLY_GET_REG(sc, sc->mly_interrupt_status)); 1454 mly_printf(sc, "COMMAND %02x %02x %02x %02x %02x %02x %02x %02x\n", 1455 MLY_GET_REG(sc, sc->mly_command_mailbox), 1456 MLY_GET_REG(sc, sc->mly_command_mailbox + 1), 1457 MLY_GET_REG(sc, sc->mly_command_mailbox + 2), 1458 MLY_GET_REG(sc, sc->mly_command_mailbox + 3), 1459 MLY_GET_REG(sc, sc->mly_command_mailbox + 4), 1460 MLY_GET_REG(sc, sc->mly_command_mailbox + 5), 1461 MLY_GET_REG(sc, sc->mly_command_mailbox + 6), 1462 MLY_GET_REG(sc, sc->mly_command_mailbox + 7)); 1463 mly_printf(sc, "STATUS %02x %02x %02x %02x %02x %02x %02x %02x\n", 1464 MLY_GET_REG(sc, sc->mly_status_mailbox), 1465 MLY_GET_REG(sc, sc->mly_status_mailbox + 1), 1466 MLY_GET_REG(sc, sc->mly_status_mailbox + 2), 1467 MLY_GET_REG(sc, sc->mly_status_mailbox + 3), 1468 MLY_GET_REG(sc, sc->mly_status_mailbox + 4), 1469 MLY_GET_REG(sc, sc->mly_status_mailbox + 5), 1470 MLY_GET_REG(sc, sc->mly_status_mailbox + 6), 1471 MLY_GET_REG(sc, sc->mly_status_mailbox + 7)); 1472 mly_printf(sc, " %04x %08x\n", 1473 MLY_GET_REG2(sc, sc->mly_status_mailbox), 1474 MLY_GET_REG4(sc, sc->mly_status_mailbox + 4)); 1475 } 1476 1477 struct mly_softc *mly_softc0 = NULL; 1478 void 1479 mly_printstate0(void) 1480 { 1481 if (mly_softc0 != NULL) 1482 mly_printstate(mly_softc0); 1483 } 1484 1485 /******************************************************************************** 1486 * Print a command 1487 */ 1488 static void 1489 mly_print_command(struct mly_command *mc) 1490 { 1491 struct mly_softc *sc = mc->mc_sc; 1492 1493 mly_printf(sc, "COMMAND @ %p\n", mc); 1494 mly_printf(sc, " slot %d\n", mc->mc_slot); 1495 mly_printf(sc, " status 0x%x\n", mc->mc_status); 1496 mly_printf(sc, " sense len %d\n", mc->mc_sense); 1497 mly_printf(sc, " resid %d\n", mc->mc_resid); 1498 mly_printf(sc, " packet %p/0x%llx\n", mc->mc_packet, mc->mc_packetphys); 1499 if (mc->mc_packet != NULL) 1500 mly_print_packet(mc); 1501 mly_printf(sc, " data %p/%d\n", mc->mc_data, mc->mc_length); 1502 mly_printf(sc, " flags %b\n", mc->mc_flags, "\20\1busy\2complete\3slotted\4mapped\5datain\6dataout\n"); 1503 mly_printf(sc, " complete %p\n", mc->mc_complete); 1504 mly_printf(sc, " private %p\n", mc->mc_private); 1505 } 1506 1507 /******************************************************************************** 1508 * Print a command packet 1509 */ 1510 static void 1511 mly_print_packet(struct mly_command *mc) 1512 { 1513 struct mly_softc *sc = mc->mc_sc; 1514 struct mly_command_generic *ge = (struct mly_command_generic *)mc->mc_packet; 1515 struct mly_command_scsi_small *ss = (struct mly_command_scsi_small *)mc->mc_packet; 1516 struct mly_command_scsi_large *sl = (struct mly_command_scsi_large *)mc->mc_packet; 1517 struct mly_command_ioctl *io = (struct mly_command_ioctl *)mc->mc_packet; 1518 int transfer; 1519 1520 mly_printf(sc, " command_id %d\n", ge->command_id); 1521 mly_printf(sc, " opcode %d\n", ge->opcode); 1522 mly_printf(sc, " command_control fua %d dpo %d est %d dd %s nas %d ddis %d\n", 1523 ge->command_control.force_unit_access, 1524 ge->command_control.disable_page_out, 1525 ge->command_control.extended_sg_table, 1526 (ge->command_control.data_direction == MLY_CCB_WRITE) ? "WRITE" : "READ", 1527 ge->command_control.no_auto_sense, 1528 ge->command_control.disable_disconnect); 1529 mly_printf(sc, " data_size %d\n", ge->data_size); 1530 mly_printf(sc, " sense_buffer_address 0x%llx\n", ge->sense_buffer_address); 1531 mly_printf(sc, " lun %d\n", ge->addr.phys.lun); 1532 mly_printf(sc, " target %d\n", ge->addr.phys.target); 1533 mly_printf(sc, " channel %d\n", ge->addr.phys.channel); 1534 mly_printf(sc, " logical device %d\n", ge->addr.log.logdev); 1535 mly_printf(sc, " controller %d\n", ge->addr.phys.controller); 1536 mly_printf(sc, " timeout %d %s\n", 1537 ge->timeout.value, 1538 (ge->timeout.scale == MLY_TIMEOUT_SECONDS) ? "seconds" : 1539 ((ge->timeout.scale == MLY_TIMEOUT_MINUTES) ? "minutes" : "hours")); 1540 mly_printf(sc, " maximum_sense_size %d\n", ge->maximum_sense_size); 1541 switch(ge->opcode) { 1542 case MDACMD_SCSIPT: 1543 case MDACMD_SCSI: 1544 mly_printf(sc, " cdb length %d\n", ss->cdb_length); 1545 mly_printf(sc, " cdb %*D\n", ss->cdb_length, ss->cdb, " "); 1546 transfer = 1; 1547 break; 1548 case MDACMD_SCSILC: 1549 case MDACMD_SCSILCPT: 1550 mly_printf(sc, " cdb length %d\n", sl->cdb_length); 1551 mly_printf(sc, " cdb 0x%llx\n", sl->cdb_physaddr); 1552 transfer = 1; 1553 break; 1554 case MDACMD_IOCTL: 1555 mly_printf(sc, " sub_ioctl 0x%x\n", io->sub_ioctl); 1556 switch(io->sub_ioctl) { 1557 case MDACIOCTL_SETMEMORYMAILBOX: 1558 mly_printf(sc, " health_buffer_size %d\n", 1559 io->param.setmemorymailbox.health_buffer_size); 1560 mly_printf(sc, " health_buffer_phys 0x%llx\n", 1561 io->param.setmemorymailbox.health_buffer_physaddr); 1562 mly_printf(sc, " command_mailbox 0x%llx\n", 1563 io->param.setmemorymailbox.command_mailbox_physaddr); 1564 mly_printf(sc, " status_mailbox 0x%llx\n", 1565 io->param.setmemorymailbox.status_mailbox_physaddr); 1566 transfer = 0; 1567 break; 1568 1569 case MDACIOCTL_SETREALTIMECLOCK: 1570 case MDACIOCTL_GETHEALTHSTATUS: 1571 case MDACIOCTL_GETCONTROLLERINFO: 1572 case MDACIOCTL_GETLOGDEVINFOVALID: 1573 case MDACIOCTL_GETPHYSDEVINFOVALID: 1574 case MDACIOCTL_GETPHYSDEVSTATISTICS: 1575 case MDACIOCTL_GETLOGDEVSTATISTICS: 1576 case MDACIOCTL_GETCONTROLLERSTATISTICS: 1577 case MDACIOCTL_GETBDT_FOR_SYSDRIVE: 1578 case MDACIOCTL_CREATENEWCONF: 1579 case MDACIOCTL_ADDNEWCONF: 1580 case MDACIOCTL_GETDEVCONFINFO: 1581 case MDACIOCTL_GETFREESPACELIST: 1582 case MDACIOCTL_MORE: 1583 case MDACIOCTL_SETPHYSDEVPARAMETER: 1584 case MDACIOCTL_GETPHYSDEVPARAMETER: 1585 case MDACIOCTL_GETLOGDEVPARAMETER: 1586 case MDACIOCTL_SETLOGDEVPARAMETER: 1587 mly_printf(sc, " param %10D\n", io->param.data.param, " "); 1588 transfer = 1; 1589 break; 1590 1591 case MDACIOCTL_GETEVENT: 1592 mly_printf(sc, " event %d\n", 1593 io->param.getevent.sequence_number_low + ((u_int32_t)io->addr.log.logdev << 16)); 1594 transfer = 1; 1595 break; 1596 1597 case MDACIOCTL_SETRAIDDEVSTATE: 1598 mly_printf(sc, " state %d\n", io->param.setraiddevstate.state); 1599 transfer = 0; 1600 break; 1601 1602 case MDACIOCTL_XLATEPHYSDEVTORAIDDEV: 1603 mly_printf(sc, " raid_device %d\n", io->param.xlatephysdevtoraiddev.raid_device); 1604 mly_printf(sc, " controller %d\n", io->param.xlatephysdevtoraiddev.controller); 1605 mly_printf(sc, " channel %d\n", io->param.xlatephysdevtoraiddev.channel); 1606 mly_printf(sc, " target %d\n", io->param.xlatephysdevtoraiddev.target); 1607 mly_printf(sc, " lun %d\n", io->param.xlatephysdevtoraiddev.lun); 1608 transfer = 0; 1609 break; 1610 1611 case MDACIOCTL_GETGROUPCONFINFO: 1612 mly_printf(sc, " group %d\n", io->param.getgroupconfinfo.group); 1613 transfer = 1; 1614 break; 1615 1616 case MDACIOCTL_GET_SUBSYSTEM_DATA: 1617 case MDACIOCTL_SET_SUBSYSTEM_DATA: 1618 case MDACIOCTL_STARTDISOCVERY: 1619 case MDACIOCTL_INITPHYSDEVSTART: 1620 case MDACIOCTL_INITPHYSDEVSTOP: 1621 case MDACIOCTL_INITRAIDDEVSTART: 1622 case MDACIOCTL_INITRAIDDEVSTOP: 1623 case MDACIOCTL_REBUILDRAIDDEVSTART: 1624 case MDACIOCTL_REBUILDRAIDDEVSTOP: 1625 case MDACIOCTL_MAKECONSISTENTDATASTART: 1626 case MDACIOCTL_MAKECONSISTENTDATASTOP: 1627 case MDACIOCTL_CONSISTENCYCHECKSTART: 1628 case MDACIOCTL_CONSISTENCYCHECKSTOP: 1629 case MDACIOCTL_RESETDEVICE: 1630 case MDACIOCTL_FLUSHDEVICEDATA: 1631 case MDACIOCTL_PAUSEDEVICE: 1632 case MDACIOCTL_UNPAUSEDEVICE: 1633 case MDACIOCTL_LOCATEDEVICE: 1634 case MDACIOCTL_SETMASTERSLAVEMODE: 1635 case MDACIOCTL_DELETERAIDDEV: 1636 case MDACIOCTL_REPLACEINTERNALDEV: 1637 case MDACIOCTL_CLEARCONF: 1638 case MDACIOCTL_GETCONTROLLERPARAMETER: 1639 case MDACIOCTL_SETCONTRLLERPARAMETER: 1640 case MDACIOCTL_CLEARCONFSUSPMODE: 1641 case MDACIOCTL_STOREIMAGE: 1642 case MDACIOCTL_READIMAGE: 1643 case MDACIOCTL_FLASHIMAGES: 1644 case MDACIOCTL_RENAMERAIDDEV: 1645 default: /* no idea what to print */ 1646 transfer = 0; 1647 break; 1648 } 1649 break; 1650 1651 case MDACMD_IOCTLCHECK: 1652 case MDACMD_MEMCOPY: 1653 default: 1654 transfer = 0; 1655 break; /* print nothing */ 1656 } 1657 if (transfer) { 1658 if (ge->command_control.extended_sg_table) { 1659 mly_printf(sc, " sg table 0x%llx/%d\n", 1660 ge->transfer.indirect.table_physaddr[0], ge->transfer.indirect.entries[0]); 1661 } else { 1662 mly_printf(sc, " 0000 0x%llx/%lld\n", 1663 ge->transfer.direct.sg[0].physaddr, ge->transfer.direct.sg[0].length); 1664 mly_printf(sc, " 0001 0x%llx/%lld\n", 1665 ge->transfer.direct.sg[1].physaddr, ge->transfer.direct.sg[1].length); 1666 } 1667 } 1668 } 1669 1670 /******************************************************************************** 1671 * Panic in a slightly informative fashion 1672 */ 1673 static void 1674 mly_panic(struct mly_softc *sc, char *reason) 1675 { 1676 mly_printstate(sc); 1677 panic(reason); 1678 } 1679 #endif 1680 1681 /******************************************************************************** 1682 * Print queue statistics, callable from DDB. 1683 */ 1684 void 1685 mly_print_controller(int controller) 1686 { 1687 struct mly_softc *sc; 1688 1689 if ((sc = devclass_get_softc(devclass_find("mly"), controller)) == NULL) { 1690 printf("mly: controller %d invalid\n", controller); 1691 } else { 1692 device_printf(sc->mly_dev, "queue curr max\n"); 1693 device_printf(sc->mly_dev, "free %04d/%04d\n", 1694 sc->mly_qstat[MLYQ_FREE].q_length, sc->mly_qstat[MLYQ_FREE].q_max); 1695 device_printf(sc->mly_dev, "ready %04d/%04d\n", 1696 sc->mly_qstat[MLYQ_READY].q_length, sc->mly_qstat[MLYQ_READY].q_max); 1697 device_printf(sc->mly_dev, "busy %04d/%04d\n", 1698 sc->mly_qstat[MLYQ_BUSY].q_length, sc->mly_qstat[MLYQ_BUSY].q_max); 1699 device_printf(sc->mly_dev, "complete %04d/%04d\n", 1700 sc->mly_qstat[MLYQ_COMPLETE].q_length, sc->mly_qstat[MLYQ_COMPLETE].q_max); 1701 } 1702 } 1703 1704 1705 /******************************************************************************** 1706 ******************************************************************************** 1707 Control device interface 1708 ******************************************************************************** 1709 ********************************************************************************/ 1710 1711 /******************************************************************************** 1712 * Accept an open operation on the control device. 1713 */ 1714 static int 1715 mly_user_open(dev_t dev, int flags, int fmt, struct proc *p) 1716 { 1717 int unit = minor(dev); 1718 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 1719 1720 sc->mly_state |= MLY_STATE_OPEN; 1721 return(0); 1722 } 1723 1724 /******************************************************************************** 1725 * Accept the last close on the control device. 1726 */ 1727 static int 1728 mly_user_close(dev_t dev, int flags, int fmt, struct proc *p) 1729 { 1730 int unit = minor(dev); 1731 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 1732 1733 sc->mly_state &= ~MLY_STATE_OPEN; 1734 return (0); 1735 } 1736 1737 /******************************************************************************** 1738 * Handle controller-specific control operations. 1739 */ 1740 static int 1741 mly_user_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 1742 { 1743 struct mly_softc *sc = (struct mly_softc *)dev->si_drv1; 1744 struct mly_user_command *uc = (struct mly_user_command *)addr; 1745 struct mly_user_health *uh = (struct mly_user_health *)addr; 1746 1747 switch(cmd) { 1748 case MLYIO_COMMAND: 1749 return(mly_user_command(sc, uc)); 1750 case MLYIO_HEALTH: 1751 return(mly_user_health(sc, uh)); 1752 default: 1753 return(ENOIOCTL); 1754 } 1755 } 1756 1757 /******************************************************************************** 1758 * Execute a command passed in from userspace. 1759 * 1760 * The control structure contains the actual command for the controller, as well 1761 * as the user-space data pointer and data size, and an optional sense buffer 1762 * size/pointer. On completion, the data size is adjusted to the command 1763 * residual, and the sense buffer size to the size of the returned sense data. 1764 * 1765 */ 1766 static int 1767 mly_user_command(struct mly_softc *sc, struct mly_user_command *uc) 1768 { 1769 struct mly_command *mc; 1770 int error, s; 1771 1772 /* allocate a command */ 1773 if (mly_alloc_command(sc, &mc)) { 1774 error = ENOMEM; 1775 goto out; /* XXX Linux version will wait for a command */ 1776 } 1777 1778 /* handle data size/direction */ 1779 mc->mc_length = (uc->DataTransferLength >= 0) ? uc->DataTransferLength : -uc->DataTransferLength; 1780 if (mc->mc_length > 0) { 1781 if ((mc->mc_data = malloc(mc->mc_length, M_DEVBUF, M_NOWAIT)) == NULL) { 1782 error = ENOMEM; 1783 goto out; 1784 } 1785 } 1786 if (uc->DataTransferLength > 0) { 1787 mc->mc_flags |= MLY_CMD_DATAIN; 1788 bzero(mc->mc_data, mc->mc_length); 1789 } 1790 if (uc->DataTransferLength < 0) { 1791 mc->mc_flags |= MLY_CMD_DATAOUT; 1792 if ((error = copyin(uc->DataTransferBuffer, mc->mc_data, mc->mc_length)) != 0) 1793 goto out; 1794 } 1795 1796 /* copy the controller command */ 1797 bcopy(&uc->CommandMailbox, mc->mc_packet, sizeof(uc->CommandMailbox)); 1798 1799 /* clear command completion handler so that we get woken up */ 1800 mc->mc_complete = NULL; 1801 1802 /* execute the command */ 1803 s = splcam(); 1804 mly_requeue_ready(mc); 1805 mly_startio(sc); 1806 while (!(mc->mc_flags & MLY_CMD_COMPLETE)) 1807 tsleep(mc, PRIBIO, "mlyioctl", 0); 1808 splx(s); 1809 1810 /* return the data to userspace */ 1811 if (uc->DataTransferLength > 0) 1812 if ((error = copyout(mc->mc_data, uc->DataTransferBuffer, mc->mc_length)) != 0) 1813 goto out; 1814 1815 /* return the sense buffer to userspace */ 1816 if ((uc->RequestSenseLength > 0) && (mc->mc_sense > 0)) { 1817 if ((error = copyout(mc->mc_packet, uc->RequestSenseBuffer, 1818 min(uc->RequestSenseLength, mc->mc_sense))) != 0) 1819 goto out; 1820 } 1821 1822 /* return command results to userspace (caller will copy out) */ 1823 uc->DataTransferLength = mc->mc_resid; 1824 uc->RequestSenseLength = min(uc->RequestSenseLength, mc->mc_sense); 1825 uc->CommandStatus = mc->mc_status; 1826 error = 0; 1827 1828 out: 1829 if (mc->mc_data != NULL) 1830 free(mc->mc_data, M_DEVBUF); 1831 if (mc != NULL) 1832 mly_release_command(mc); 1833 return(error); 1834 } 1835 1836 /******************************************************************************** 1837 * Return health status to userspace. If the health change index in the user 1838 * structure does not match that currently exported by the controller, we 1839 * return the current status immediately. Otherwise, we block until either 1840 * interrupted or new status is delivered. 1841 */ 1842 static int 1843 mly_user_health(struct mly_softc *sc, struct mly_user_health *uh) 1844 { 1845 struct mly_health_status mh; 1846 int error, s; 1847 1848 /* fetch the current health status from userspace */ 1849 if ((error = copyin(uh->HealthStatusBuffer, &mh, sizeof(mh))) != 0) 1850 return(error); 1851 1852 /* spin waiting for a status update */ 1853 s = splcam(); 1854 error = EWOULDBLOCK; 1855 while ((error != 0) && (sc->mly_event_change == mh.change_counter)) 1856 error = tsleep(&sc->mly_event_change, PRIBIO | PCATCH, "mlyhealth", 0); 1857 splx(s); 1858 1859 /* copy the controller's health status buffer out (there is a race here if it changes again) */ 1860 error = copyout(&sc->mly_mmbox->mmm_health.status, uh->HealthStatusBuffer, 1861 sizeof(uh->HealthStatusBuffer)); 1862 return(error); 1863 } 1864