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 1.12 2005/06/10 17:10:26 swildner 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 #include <sys/thread2.h> 46 47 #include <bus/cam/scsi/scsi_all.h> 48 49 #include "mlyreg.h" 50 #include "mlyio.h" 51 #include "mlyvar.h" 52 #define MLY_DEFINE_TABLES 53 #include "mly_tables.h" 54 55 static int mly_get_controllerinfo(struct mly_softc *sc); 56 static void mly_scan_devices(struct mly_softc *sc); 57 static void mly_rescan_btl(struct mly_softc *sc, int bus, int target); 58 static void mly_complete_rescan(struct mly_command *mc); 59 static int mly_get_eventstatus(struct mly_softc *sc); 60 static int mly_enable_mmbox(struct mly_softc *sc); 61 static int mly_flush(struct mly_softc *sc); 62 static int mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, 63 size_t datasize, u_int8_t *status, void *sense_buffer, size_t *sense_length); 64 static void mly_fetch_event(struct mly_softc *sc); 65 static void mly_complete_event(struct mly_command *mc); 66 static void mly_process_event(struct mly_softc *sc, struct mly_event *me); 67 static void mly_periodic(void *data); 68 69 static int mly_immediate_command(struct mly_command *mc); 70 static int mly_start(struct mly_command *mc); 71 static void mly_complete(void *context, int pending); 72 73 static void mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error); 74 static int mly_alloc_commands(struct mly_softc *sc); 75 static void mly_map_command(struct mly_command *mc); 76 static void mly_unmap_command(struct mly_command *mc); 77 78 static int mly_fwhandshake(struct mly_softc *sc); 79 80 static void mly_describe_controller(struct mly_softc *sc); 81 #ifdef MLY_DEBUG 82 static void mly_printstate(struct mly_softc *sc); 83 static void mly_print_command(struct mly_command *mc); 84 static void mly_print_packet(struct mly_command *mc); 85 static void mly_panic(struct mly_softc *sc, char *reason); 86 #endif 87 void mly_print_controller(int controller); 88 89 static d_open_t mly_user_open; 90 static d_close_t mly_user_close; 91 static d_ioctl_t mly_user_ioctl; 92 static int mly_user_command(struct mly_softc *sc, struct mly_user_command *uc); 93 static int mly_user_health(struct mly_softc *sc, struct mly_user_health *uh); 94 95 #define MLY_CDEV_MAJOR 158 96 97 static struct cdevsw mly_cdevsw = { 98 /* name */ "mly", 99 /* cmaj */ MLY_CDEV_MAJOR, 100 /* flags */ 0, 101 /* port */ NULL, 102 /* clone */ NULL, 103 104 mly_user_open, 105 mly_user_close, 106 noread, 107 nowrite, 108 mly_user_ioctl, 109 nopoll, 110 nommap, 111 nostrategy, 112 nodump, 113 nopsize 114 }; 115 116 /******************************************************************************** 117 ******************************************************************************** 118 Device Interface 119 ******************************************************************************** 120 ********************************************************************************/ 121 122 /******************************************************************************** 123 * Initialise the controller and softc 124 */ 125 int 126 mly_attach(struct mly_softc *sc) 127 { 128 int error; 129 130 debug_called(1); 131 132 callout_init(&sc->mly_periodic); 133 134 /* 135 * Initialise per-controller queues. 136 */ 137 mly_initq_free(sc); 138 mly_initq_ready(sc); 139 mly_initq_busy(sc); 140 mly_initq_complete(sc); 141 142 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005 143 /* 144 * Initialise command-completion task. 145 */ 146 TASK_INIT(&sc->mly_task_complete, 0, mly_complete, sc); 147 #endif 148 149 /* disable interrupts before we start talking to the controller */ 150 MLY_MASK_INTERRUPTS(sc); 151 152 /* 153 * Wait for the controller to come ready, handshake with the firmware if required. 154 * This is typically only necessary on platforms where the controller BIOS does not 155 * run. 156 */ 157 if ((error = mly_fwhandshake(sc))) 158 return(error); 159 160 /* 161 * Allocate command buffers 162 */ 163 if ((error = mly_alloc_commands(sc))) 164 return(error); 165 166 /* 167 * Obtain controller feature information 168 */ 169 if ((error = mly_get_controllerinfo(sc))) 170 return(error); 171 172 /* 173 * Get the current event counter for health purposes, populate the initial 174 * health status buffer. 175 */ 176 if ((error = mly_get_eventstatus(sc))) 177 return(error); 178 179 /* 180 * Enable memory-mailbox mode 181 */ 182 if ((error = mly_enable_mmbox(sc))) 183 return(error); 184 185 /* 186 * Attach to CAM. 187 */ 188 if ((error = mly_cam_attach(sc))) 189 return(error); 190 191 /* 192 * Print a little information about the controller 193 */ 194 mly_describe_controller(sc); 195 196 /* 197 * Mark all attached devices for rescan 198 */ 199 mly_scan_devices(sc); 200 201 /* 202 * Instigate the first status poll immediately. Rescan completions won't 203 * happen until interrupts are enabled, which should still be before 204 * the SCSI subsystem gets to us. (XXX assuming CAM and interrupt-driven 205 * discovery here...) 206 */ 207 mly_periodic((void *)sc); 208 209 /* 210 * Create the control device. 211 */ 212 cdevsw_add(&mly_cdevsw, -1, device_get_unit(sc->mly_dev)); 213 sc->mly_dev_t = make_dev(&mly_cdevsw, device_get_unit(sc->mly_dev), 214 UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR, 215 "mly%d", device_get_unit(sc->mly_dev)); 216 sc->mly_dev_t->si_drv1 = sc; 217 218 /* enable interrupts now */ 219 MLY_UNMASK_INTERRUPTS(sc); 220 221 return(0); 222 } 223 224 /******************************************************************************** 225 * Bring the controller to a state where it can be safely left alone. 226 */ 227 void 228 mly_detach(struct mly_softc *sc) 229 { 230 231 debug_called(1); 232 233 /* kill the periodic event */ 234 callout_stop(&sc->mly_periodic); 235 236 sc->mly_state |= MLY_STATE_SUSPEND; 237 238 /* flush controller */ 239 mly_printf(sc, "flushing cache..."); 240 printf("%s\n", mly_flush(sc) ? "failed" : "done"); 241 242 MLY_MASK_INTERRUPTS(sc); 243 } 244 245 /******************************************************************************** 246 ******************************************************************************** 247 Command Wrappers 248 ******************************************************************************** 249 ********************************************************************************/ 250 251 /******************************************************************************** 252 * Fill in the mly_controllerinfo and mly_controllerparam fields in the softc. 253 */ 254 static int 255 mly_get_controllerinfo(struct mly_softc *sc) 256 { 257 struct mly_command_ioctl mci; 258 u_int8_t status; 259 int error; 260 261 debug_called(1); 262 263 if (sc->mly_controllerinfo != NULL) 264 free(sc->mly_controllerinfo, M_DEVBUF); 265 266 /* build the getcontrollerinfo ioctl and send it */ 267 bzero(&mci, sizeof(mci)); 268 sc->mly_controllerinfo = NULL; 269 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERINFO; 270 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerinfo, sizeof(*sc->mly_controllerinfo), 271 &status, NULL, NULL))) 272 return(error); 273 if (status != 0) 274 return(EIO); 275 276 if (sc->mly_controllerparam != NULL) 277 free(sc->mly_controllerparam, M_DEVBUF); 278 279 /* build the getcontrollerparameter ioctl and send it */ 280 bzero(&mci, sizeof(mci)); 281 sc->mly_controllerparam = NULL; 282 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERPARAMETER; 283 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerparam, sizeof(*sc->mly_controllerparam), 284 &status, NULL, NULL))) 285 return(error); 286 if (status != 0) 287 return(EIO); 288 289 return(0); 290 } 291 292 /******************************************************************************** 293 * Schedule all possible devices for a rescan. 294 * 295 */ 296 static void 297 mly_scan_devices(struct mly_softc *sc) 298 { 299 int bus, target, nchn; 300 301 debug_called(1); 302 303 /* 304 * Clear any previous BTL information. 305 */ 306 bzero(&sc->mly_btl, sizeof(sc->mly_btl)); 307 308 /* 309 * Mark all devices as requiring a rescan, and let the early periodic scan collect them. 310 */ 311 nchn = sc->mly_controllerinfo->physical_channels_present + 312 sc->mly_controllerinfo->virtual_channels_present; 313 for (bus = 0; bus < nchn; bus++) 314 for (target = 0; target < MLY_MAX_TARGETS; target++) 315 sc->mly_btl[bus][target].mb_flags = MLY_BTL_RESCAN; 316 317 } 318 319 /******************************************************************************** 320 * Rescan a device, possibly as a consequence of getting an event which suggests 321 * that it may have changed. 322 */ 323 static void 324 mly_rescan_btl(struct mly_softc *sc, int bus, int target) 325 { 326 struct mly_command *mc; 327 struct mly_command_ioctl *mci; 328 329 debug_called(2); 330 331 /* get a command */ 332 mc = NULL; 333 if (mly_alloc_command(sc, &mc)) 334 return; /* we'll be retried soon */ 335 336 /* set up the data buffer */ 337 mc->mc_data = malloc(sizeof(union mly_devinfo), M_DEVBUF, M_INTWAIT | M_ZERO); 338 mc->mc_flags |= MLY_CMD_DATAIN; 339 mc->mc_complete = mly_complete_rescan; 340 341 sc->mly_btl[bus][target].mb_flags &= ~MLY_BTL_RESCAN; 342 343 /* 344 * Build the ioctl. 345 * 346 * At this point we are committed to sending this request, as it 347 * will be the only one constructed for this particular update. 348 */ 349 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl; 350 mci->opcode = MDACMD_IOCTL; 351 mci->addr.phys.controller = 0; 352 mci->timeout.value = 30; 353 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 354 if (bus >= sc->mly_controllerinfo->physical_channels_present) { 355 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getlogdevinfovalid); 356 mci->sub_ioctl = MDACIOCTL_GETLOGDEVINFOVALID; 357 mci->addr.log.logdev = ((bus - sc->mly_controllerinfo->physical_channels_present) * MLY_MAX_TARGETS) 358 + target; 359 debug(2, "logical device %d", mci->addr.log.logdev); 360 } else { 361 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getphysdevinfovalid); 362 mci->sub_ioctl = MDACIOCTL_GETPHYSDEVINFOVALID; 363 mci->addr.phys.lun = 0; 364 mci->addr.phys.target = target; 365 mci->addr.phys.channel = bus; 366 debug(2, "physical device %d:%d", mci->addr.phys.channel, mci->addr.phys.target); 367 } 368 369 /* 370 * Use the ready queue to get this command dispatched. 371 */ 372 mly_enqueue_ready(mc); 373 mly_startio(sc); 374 } 375 376 /******************************************************************************** 377 * Handle the completion of a rescan operation 378 */ 379 static void 380 mly_complete_rescan(struct mly_command *mc) 381 { 382 struct mly_softc *sc = mc->mc_sc; 383 struct mly_ioctl_getlogdevinfovalid *ldi; 384 struct mly_ioctl_getphysdevinfovalid *pdi; 385 int bus, target; 386 387 debug_called(2); 388 389 /* iff the command completed OK, we should use the result to update our data */ 390 if (mc->mc_status == 0) { 391 if (mc->mc_length == sizeof(*ldi)) { 392 ldi = (struct mly_ioctl_getlogdevinfovalid *)mc->mc_data; 393 bus = MLY_LOGDEV_BUS(sc, ldi->logical_device_number); 394 target = MLY_LOGDEV_TARGET(ldi->logical_device_number); 395 sc->mly_btl[bus][target].mb_flags = MLY_BTL_LOGICAL; /* clears all other flags */ 396 sc->mly_btl[bus][target].mb_type = ldi->raid_level; 397 sc->mly_btl[bus][target].mb_state = ldi->state; 398 debug(2, "BTL rescan for %d returns %s, %s", ldi->logical_device_number, 399 mly_describe_code(mly_table_device_type, ldi->raid_level), 400 mly_describe_code(mly_table_device_state, ldi->state)); 401 } else if (mc->mc_length == sizeof(*pdi)) { 402 pdi = (struct mly_ioctl_getphysdevinfovalid *)mc->mc_data; 403 bus = pdi->channel; 404 target = pdi->target; 405 sc->mly_btl[bus][target].mb_flags = MLY_BTL_PHYSICAL; /* clears all other flags */ 406 sc->mly_btl[bus][target].mb_type = MLY_DEVICE_TYPE_PHYSICAL; 407 sc->mly_btl[bus][target].mb_state = pdi->state; 408 sc->mly_btl[bus][target].mb_speed = pdi->speed; 409 sc->mly_btl[bus][target].mb_width = pdi->width; 410 if (pdi->state != MLY_DEVICE_STATE_UNCONFIGURED) 411 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_PROTECTED; 412 debug(2, "BTL rescan for %d:%d returns %s", bus, target, 413 mly_describe_code(mly_table_device_state, pdi->state)); 414 } else { 415 mly_printf(sc, "BTL rescan result corrupted\n"); 416 } 417 } else { 418 /* 419 * A request sent for a device beyond the last device present will fail. 420 * We don't care about this, so we do nothing about it. 421 */ 422 } 423 free(mc->mc_data, M_DEVBUF); 424 mly_release_command(mc); 425 } 426 427 /******************************************************************************** 428 * Get the current health status and set the 'next event' counter to suit. 429 */ 430 static int 431 mly_get_eventstatus(struct mly_softc *sc) 432 { 433 struct mly_command_ioctl mci; 434 struct mly_health_status *mh; 435 u_int8_t status; 436 int error; 437 438 /* build the gethealthstatus ioctl and send it */ 439 bzero(&mci, sizeof(mci)); 440 mh = NULL; 441 mci.sub_ioctl = MDACIOCTL_GETHEALTHSTATUS; 442 443 if ((error = mly_ioctl(sc, &mci, (void **)&mh, sizeof(*mh), &status, NULL, NULL))) 444 return(error); 445 if (status != 0) 446 return(EIO); 447 448 /* get the event counter */ 449 sc->mly_event_change = mh->change_counter; 450 sc->mly_event_waiting = mh->next_event; 451 sc->mly_event_counter = mh->next_event; 452 453 /* save the health status into the memory mailbox */ 454 bcopy(mh, &sc->mly_mmbox->mmm_health.status, sizeof(*mh)); 455 456 debug(1, "initial change counter %d, event counter %d", mh->change_counter, mh->next_event); 457 458 free(mh, M_DEVBUF); 459 return(0); 460 } 461 462 /******************************************************************************** 463 * Enable the memory mailbox mode. 464 */ 465 static int 466 mly_enable_mmbox(struct mly_softc *sc) 467 { 468 struct mly_command_ioctl mci; 469 u_int8_t *sp, status; 470 int error; 471 472 debug_called(1); 473 474 /* build the ioctl and send it */ 475 bzero(&mci, sizeof(mci)); 476 mci.sub_ioctl = MDACIOCTL_SETMEMORYMAILBOX; 477 /* set buffer addresses */ 478 mci.param.setmemorymailbox.command_mailbox_physaddr = 479 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_command); 480 mci.param.setmemorymailbox.status_mailbox_physaddr = 481 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_status); 482 mci.param.setmemorymailbox.health_buffer_physaddr = 483 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_health); 484 485 /* set buffer sizes - abuse of data_size field is revolting */ 486 sp = (u_int8_t *)&mci.data_size; 487 sp[0] = ((sizeof(union mly_command_packet) * MLY_MMBOX_COMMANDS) / 1024); 488 sp[1] = (sizeof(union mly_status_packet) * MLY_MMBOX_STATUS) / 1024; 489 mci.param.setmemorymailbox.health_buffer_size = sizeof(union mly_health_region) / 1024; 490 491 debug(1, "memory mailbox at %p (0x%llx/%d 0x%llx/%d 0x%llx/%d", sc->mly_mmbox, 492 mci.param.setmemorymailbox.command_mailbox_physaddr, sp[0], 493 mci.param.setmemorymailbox.status_mailbox_physaddr, sp[1], 494 mci.param.setmemorymailbox.health_buffer_physaddr, 495 mci.param.setmemorymailbox.health_buffer_size); 496 497 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL))) 498 return(error); 499 if (status != 0) 500 return(EIO); 501 sc->mly_state |= MLY_STATE_MMBOX_ACTIVE; 502 debug(1, "memory mailbox active"); 503 return(0); 504 } 505 506 /******************************************************************************** 507 * Flush all pending I/O from the controller. 508 */ 509 static int 510 mly_flush(struct mly_softc *sc) 511 { 512 struct mly_command_ioctl mci; 513 u_int8_t status; 514 int error; 515 516 debug_called(1); 517 518 /* build the ioctl */ 519 bzero(&mci, sizeof(mci)); 520 mci.sub_ioctl = MDACIOCTL_FLUSHDEVICEDATA; 521 mci.param.deviceoperation.operation_device = MLY_OPDEVICE_PHYSICAL_CONTROLLER; 522 523 /* pass it off to the controller */ 524 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL))) 525 return(error); 526 527 return((status == 0) ? 0 : EIO); 528 } 529 530 /******************************************************************************** 531 * Perform an ioctl command. 532 * 533 * If (data) is not NULL, the command requires data transfer. If (*data) is NULL 534 * the command requires data transfer from the controller, and we will allocate 535 * a buffer for it. If (*data) is not NULL, the command requires data transfer 536 * to the controller. 537 * 538 * XXX passing in the whole ioctl structure is ugly. Better ideas? 539 * 540 * XXX we don't even try to handle the case where datasize > 4k. We should. 541 */ 542 static int 543 mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, size_t datasize, 544 u_int8_t *status, void *sense_buffer, size_t *sense_length) 545 { 546 struct mly_command *mc; 547 struct mly_command_ioctl *mci; 548 int error; 549 550 debug_called(1); 551 552 mc = NULL; 553 if (mly_alloc_command(sc, &mc)) { 554 error = ENOMEM; 555 goto out; 556 } 557 558 /* copy the ioctl structure, but save some important fields and then fixup */ 559 mci = &mc->mc_packet->ioctl; 560 ioctl->sense_buffer_address = mci->sense_buffer_address; 561 ioctl->maximum_sense_size = mci->maximum_sense_size; 562 *mci = *ioctl; 563 mci->opcode = MDACMD_IOCTL; 564 mci->timeout.value = 30; 565 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 566 567 /* handle the data buffer */ 568 if (data != NULL) { 569 if (*data == NULL) { 570 /* allocate data buffer */ 571 mc->mc_data = malloc(datasize, M_DEVBUF, M_INTWAIT); 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 u_int32_t event; 619 620 debug_called(2); 621 622 /* get a command */ 623 mc = NULL; 624 if (mly_alloc_command(sc, &mc)) 625 return; /* we'll get retried the next time a command completes */ 626 627 /* set up the data buffer */ 628 mc->mc_data = malloc(sizeof(struct mly_event), M_DEVBUF, M_INTWAIT|M_ZERO); 629 mc->mc_length = sizeof(struct mly_event); 630 mc->mc_flags |= MLY_CMD_DATAIN; 631 mc->mc_complete = mly_complete_event; 632 633 /* 634 * Get an event number to fetch. It's possible that we've raced with another 635 * context for the last event, in which case there will be no more events. 636 */ 637 crit_enter(); 638 if (sc->mly_event_counter == sc->mly_event_waiting) { 639 mly_release_command(mc); 640 crit_exit(); 641 return; 642 } 643 event = sc->mly_event_counter++; 644 crit_exit(); 645 646 /* 647 * Build the ioctl. 648 * 649 * At this point we are committed to sending this request, as it 650 * will be the only one constructed for this particular event number. 651 */ 652 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl; 653 mci->opcode = MDACMD_IOCTL; 654 mci->data_size = sizeof(struct mly_event); 655 mci->addr.phys.lun = (event >> 16) & 0xff; 656 mci->addr.phys.target = (event >> 24) & 0xff; 657 mci->addr.phys.channel = 0; 658 mci->addr.phys.controller = 0; 659 mci->timeout.value = 30; 660 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 661 mci->sub_ioctl = MDACIOCTL_GETEVENT; 662 mci->param.getevent.sequence_number_low = event & 0xffff; 663 664 debug(2, "fetch event %u", event); 665 666 /* 667 * Use the ready queue to get this command dispatched. 668 */ 669 mly_enqueue_ready(mc); 670 mly_startio(sc); 671 } 672 673 /******************************************************************************** 674 * Handle the completion of an event poll. 675 * 676 * Note that we don't actually have to instigate another poll; the completion of 677 * this command will trigger that if there are any more events to poll for. 678 */ 679 static void 680 mly_complete_event(struct mly_command *mc) 681 { 682 struct mly_softc *sc = mc->mc_sc; 683 struct mly_event *me = (struct mly_event *)mc->mc_data; 684 685 debug_called(2); 686 687 /* 688 * If the event was successfully fetched, process it. 689 */ 690 if (mc->mc_status == SCSI_STATUS_OK) { 691 mly_process_event(sc, me); 692 free(me, M_DEVBUF); 693 } 694 mly_release_command(mc); 695 } 696 697 /******************************************************************************** 698 * Process a controller event. 699 */ 700 static void 701 mly_process_event(struct mly_softc *sc, struct mly_event *me) 702 { 703 struct scsi_sense_data *ssd = (struct scsi_sense_data *)&me->sense[0]; 704 char *fp, *tp; 705 int bus, target, event, class, action; 706 707 /* 708 * Errors can be reported using vendor-unique sense data. In this case, the 709 * event code will be 0x1c (Request sense data present), the sense key will 710 * be 0x09 (vendor specific), the MSB of the ASC will be set, and the 711 * actual event code will be a 16-bit value comprised of the ASCQ (low byte) 712 * and low seven bits of the ASC (low seven bits of the high byte). 713 */ 714 if ((me->code == 0x1c) && 715 ((ssd->flags & SSD_KEY) == SSD_KEY_Vendor_Specific) && 716 (ssd->add_sense_code & 0x80)) { 717 event = ((int)(ssd->add_sense_code & ~0x80) << 8) + ssd->add_sense_code_qual; 718 } else { 719 event = me->code; 720 } 721 722 /* look up event, get codes */ 723 fp = mly_describe_code(mly_table_event, event); 724 725 debug(2, "Event %d code 0x%x", me->sequence_number, me->code); 726 727 /* quiet event? */ 728 class = fp[0]; 729 if (isupper(class) && bootverbose) 730 class = tolower(class); 731 732 /* get action code, text string */ 733 action = fp[1]; 734 tp = &fp[2]; 735 736 /* 737 * Print some information about the event. 738 * 739 * This code uses a table derived from the corresponding portion of the Linux 740 * driver, and thus the parser is very similar. 741 */ 742 switch(class) { 743 case 'p': /* error on physical device */ 744 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp); 745 if (action == 'r') 746 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN; 747 break; 748 case 'l': /* error on logical unit */ 749 case 'm': /* message about logical unit */ 750 bus = MLY_LOGDEV_BUS(sc, me->lun); 751 target = MLY_LOGDEV_TARGET(me->lun); 752 mly_name_device(sc, bus, target); 753 mly_printf(sc, "logical device %d (%s) %s\n", me->lun, sc->mly_btl[bus][target].mb_name, tp); 754 if (action == 'r') 755 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_RESCAN; 756 break; 757 break; 758 case 's': /* report of sense data */ 759 if (((ssd->flags & SSD_KEY) == SSD_KEY_NO_SENSE) || 760 (((ssd->flags & SSD_KEY) == SSD_KEY_NOT_READY) && 761 (ssd->add_sense_code == 0x04) && 762 ((ssd->add_sense_code_qual == 0x01) || (ssd->add_sense_code_qual == 0x02)))) 763 break; /* ignore NO_SENSE or NOT_READY in one case */ 764 765 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp); 766 mly_printf(sc, " sense key %d asc %02x ascq %02x\n", 767 ssd->flags & SSD_KEY, ssd->add_sense_code, ssd->add_sense_code_qual); 768 mly_printf(sc, " info %4D csi %4D\n", ssd->info, "", ssd->cmd_spec_info, ""); 769 if (action == 'r') 770 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN; 771 break; 772 case 'e': 773 mly_printf(sc, tp, me->target, me->lun); 774 break; 775 case 'c': 776 mly_printf(sc, "controller %s\n", tp); 777 break; 778 case '?': 779 mly_printf(sc, "%s - %d\n", tp, me->code); 780 break; 781 default: /* probably a 'noisy' event being ignored */ 782 break; 783 } 784 } 785 786 /******************************************************************************** 787 * Perform periodic activities. 788 */ 789 static void 790 mly_periodic(void *data) 791 { 792 struct mly_softc *sc = (struct mly_softc *)data; 793 int nchn, bus, target; 794 795 debug_called(2); 796 797 /* 798 * Scan devices. 799 */ 800 nchn = sc->mly_controllerinfo->physical_channels_present + 801 sc->mly_controllerinfo->virtual_channels_present; 802 for (bus = 0; bus < nchn; bus++) { 803 for (target = 0; target < MLY_MAX_TARGETS; target++) { 804 805 /* ignore the controller in this scan */ 806 if (target == sc->mly_controllerparam->initiator_id) 807 continue; 808 809 /* perform device rescan? */ 810 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_RESCAN) 811 mly_rescan_btl(sc, bus, target); 812 } 813 } 814 815 callout_reset(&sc->mly_periodic, hz, mly_periodic, sc); 816 } 817 818 /******************************************************************************** 819 ******************************************************************************** 820 Command Processing 821 ******************************************************************************** 822 ********************************************************************************/ 823 824 /******************************************************************************** 825 * Run a command and wait for it to complete. 826 * 827 */ 828 static int 829 mly_immediate_command(struct mly_command *mc) 830 { 831 struct mly_softc *sc = mc->mc_sc; 832 int error; 833 834 debug_called(2); 835 836 /* spinning at splcam is ugly, but we're only used during controller init */ 837 crit_enter(); 838 if ((error = mly_start(mc))) 839 return(error); 840 841 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) { 842 /* sleep on the command */ 843 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) { 844 tsleep(mc, 0, "mlywait", 0); 845 } 846 } else { 847 /* spin and collect status while we do */ 848 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) { 849 mly_done(mc->mc_sc); 850 } 851 } 852 crit_exit(); 853 return(0); 854 } 855 856 /******************************************************************************** 857 * Start as much queued I/O as possible on the controller 858 */ 859 void 860 mly_startio(struct mly_softc *sc) 861 { 862 struct mly_command *mc; 863 864 debug_called(2); 865 866 for (;;) { 867 868 /* try for a ready command */ 869 mc = mly_dequeue_ready(sc); 870 871 /* try to build a command from a queued ccb */ 872 if (!mc) 873 mly_cam_command(sc, &mc); 874 875 /* no command == nothing to do */ 876 if (!mc) 877 break; 878 879 /* try to post the command */ 880 if (mly_start(mc)) { 881 /* controller busy, or no resources - defer for later */ 882 mly_requeue_ready(mc); 883 break; 884 } 885 } 886 } 887 888 /******************************************************************************** 889 * Deliver a command to the controller; allocate controller resources at the 890 * last moment. 891 */ 892 static int 893 mly_start(struct mly_command *mc) 894 { 895 struct mly_softc *sc = mc->mc_sc; 896 union mly_command_packet *pkt; 897 898 debug_called(2); 899 900 /* 901 * Set the command up for delivery to the controller. 902 */ 903 mly_map_command(mc); 904 mc->mc_packet->generic.command_id = mc->mc_slot; 905 906 crit_enter(); 907 908 /* 909 * Do we have to use the hardware mailbox? 910 */ 911 if (!(sc->mly_state & MLY_STATE_MMBOX_ACTIVE)) { 912 /* 913 * Check to see if the controller is ready for us. 914 */ 915 if (MLY_IDBR_TRUE(sc, MLY_HM_CMDSENT)) { 916 crit_exit(); 917 return(EBUSY); 918 } 919 mc->mc_flags |= MLY_CMD_BUSY; 920 921 /* 922 * It's ready, send the command. 923 */ 924 MLY_SET_MBOX(sc, sc->mly_command_mailbox, &mc->mc_packetphys); 925 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_CMDSENT); 926 927 } else { /* use memory-mailbox mode */ 928 929 pkt = &sc->mly_mmbox->mmm_command[sc->mly_mmbox_command_index]; 930 931 /* check to see if the next index is free yet */ 932 if (pkt->mmbox.flag != 0) { 933 crit_exit(); 934 return(EBUSY); 935 } 936 mc->mc_flags |= MLY_CMD_BUSY; 937 938 /* copy in new command */ 939 bcopy(mc->mc_packet->mmbox.data, pkt->mmbox.data, sizeof(pkt->mmbox.data)); 940 /* barrier to ensure completion of previous write before we write the flag */ 941 bus_space_barrier(NULL, NULL, 0, 0, BUS_SPACE_BARRIER_WRITE); /* tag/handle? */ 942 /* copy flag last */ 943 pkt->mmbox.flag = mc->mc_packet->mmbox.flag; 944 /* barrier to ensure completion of previous write before we notify the controller */ 945 bus_space_barrier(NULL, NULL, 0, 0, BUS_SPACE_BARRIER_WRITE); /* tag/handle */ 946 947 /* signal controller, update index */ 948 MLY_SET_REG(sc, sc->mly_idbr, MLY_AM_CMDSENT); 949 sc->mly_mmbox_command_index = (sc->mly_mmbox_command_index + 1) % MLY_MMBOX_COMMANDS; 950 } 951 952 mly_enqueue_busy(mc); 953 crit_exit(); 954 return(0); 955 } 956 957 /******************************************************************************** 958 * Pick up command status from the controller, schedule a completion event 959 */ 960 void 961 mly_done(struct mly_softc *sc) 962 { 963 struct mly_command *mc; 964 union mly_status_packet *sp; 965 u_int16_t slot; 966 int worked; 967 968 crit_enter(); 969 worked = 0; 970 971 /* pick up hardware-mailbox commands */ 972 if (MLY_ODBR_TRUE(sc, MLY_HM_STSREADY)) { 973 slot = MLY_GET_REG2(sc, sc->mly_status_mailbox); 974 if (slot < MLY_SLOT_MAX) { 975 mc = &sc->mly_command[slot - MLY_SLOT_START]; 976 mc->mc_status = MLY_GET_REG(sc, sc->mly_status_mailbox + 2); 977 mc->mc_sense = MLY_GET_REG(sc, sc->mly_status_mailbox + 3); 978 mc->mc_resid = MLY_GET_REG4(sc, sc->mly_status_mailbox + 4); 979 mly_remove_busy(mc); 980 mc->mc_flags &= ~MLY_CMD_BUSY; 981 mly_enqueue_complete(mc); 982 worked = 1; 983 } else { 984 /* slot 0xffff may mean "extremely bogus command" */ 985 mly_printf(sc, "got HM completion for illegal slot %u\n", slot); 986 } 987 /* unconditionally acknowledge status */ 988 MLY_SET_REG(sc, sc->mly_odbr, MLY_HM_STSREADY); 989 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 990 } 991 992 /* pick up memory-mailbox commands */ 993 if (MLY_ODBR_TRUE(sc, MLY_AM_STSREADY)) { 994 for (;;) { 995 sp = &sc->mly_mmbox->mmm_status[sc->mly_mmbox_status_index]; 996 997 /* check for more status */ 998 if (sp->mmbox.flag == 0) 999 break; 1000 1001 /* get slot number */ 1002 slot = sp->status.command_id; 1003 if (slot < MLY_SLOT_MAX) { 1004 mc = &sc->mly_command[slot - MLY_SLOT_START]; 1005 mc->mc_status = sp->status.status; 1006 mc->mc_sense = sp->status.sense_length; 1007 mc->mc_resid = sp->status.residue; 1008 mly_remove_busy(mc); 1009 mc->mc_flags &= ~MLY_CMD_BUSY; 1010 mly_enqueue_complete(mc); 1011 worked = 1; 1012 } else { 1013 /* slot 0xffff may mean "extremely bogus command" */ 1014 mly_printf(sc, "got AM completion for illegal slot %u at %d\n", 1015 slot, sc->mly_mmbox_status_index); 1016 } 1017 1018 /* clear and move to next index */ 1019 sp->mmbox.flag = 0; 1020 sc->mly_mmbox_status_index = (sc->mly_mmbox_status_index + 1) % MLY_MMBOX_STATUS; 1021 } 1022 /* acknowledge that we have collected status value(s) */ 1023 MLY_SET_REG(sc, sc->mly_odbr, MLY_AM_STSREADY); 1024 } 1025 1026 crit_exit(); 1027 if (worked) { 1028 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005 1029 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) 1030 taskqueue_enqueue(taskqueue_swi, &sc->mly_task_complete); 1031 else 1032 #endif 1033 mly_complete(sc, 0); 1034 } 1035 } 1036 1037 /******************************************************************************** 1038 * Process completed commands 1039 */ 1040 static void 1041 mly_complete(void *context, int pending) 1042 { 1043 struct mly_softc *sc = (struct mly_softc *)context; 1044 struct mly_command *mc; 1045 void (* mc_complete)(struct mly_command *mc); 1046 1047 1048 debug_called(2); 1049 1050 /* 1051 * Spin pulling commands off the completed queue and processing them. 1052 */ 1053 while ((mc = mly_dequeue_complete(sc)) != NULL) { 1054 1055 /* 1056 * Free controller resources, mark command complete. 1057 * 1058 * Note that as soon as we mark the command complete, it may be freed 1059 * out from under us, so we need to save the mc_complete field in 1060 * order to later avoid dereferencing mc. (We would not expect to 1061 * have a polling/sleeping consumer with mc_complete != NULL). 1062 */ 1063 mly_unmap_command(mc); 1064 mc_complete = mc->mc_complete; 1065 mc->mc_flags |= MLY_CMD_COMPLETE; 1066 1067 /* 1068 * Call completion handler or wake up sleeping consumer. 1069 */ 1070 if (mc_complete != NULL) { 1071 mc_complete(mc); 1072 } else { 1073 wakeup(mc); 1074 } 1075 } 1076 1077 /* 1078 * We may have freed up controller resources which would allow us 1079 * to push more commands onto the controller, so we check here. 1080 */ 1081 mly_startio(sc); 1082 1083 /* 1084 * The controller may have updated the health status information, 1085 * so check for it here. 1086 * 1087 * Note that we only check for health status after a completed command. It 1088 * might be wise to ping the controller occasionally if it's been idle for 1089 * a while just to check up on it. While a filesystem is mounted, or I/O is 1090 * active this isn't really an issue. 1091 */ 1092 if (sc->mly_mmbox->mmm_health.status.change_counter != sc->mly_event_change) { 1093 sc->mly_event_change = sc->mly_mmbox->mmm_health.status.change_counter; 1094 debug(1, "event change %d, event status update, %d -> %d", sc->mly_event_change, 1095 sc->mly_event_waiting, sc->mly_mmbox->mmm_health.status.next_event); 1096 sc->mly_event_waiting = sc->mly_mmbox->mmm_health.status.next_event; 1097 1098 /* wake up anyone that might be interested in this */ 1099 wakeup(&sc->mly_event_change); 1100 } 1101 if (sc->mly_event_counter != sc->mly_event_waiting) 1102 mly_fetch_event(sc); 1103 } 1104 1105 /******************************************************************************** 1106 ******************************************************************************** 1107 Command Buffer Management 1108 ******************************************************************************** 1109 ********************************************************************************/ 1110 1111 /******************************************************************************** 1112 * Allocate a command. 1113 */ 1114 int 1115 mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp) 1116 { 1117 struct mly_command *mc; 1118 1119 debug_called(3); 1120 1121 if ((mc = mly_dequeue_free(sc)) == NULL) 1122 return(ENOMEM); 1123 1124 *mcp = mc; 1125 return(0); 1126 } 1127 1128 /******************************************************************************** 1129 * Release a command back to the freelist. 1130 */ 1131 void 1132 mly_release_command(struct mly_command *mc) 1133 { 1134 debug_called(3); 1135 1136 /* 1137 * Fill in parts of the command that may cause confusion if 1138 * a consumer doesn't when we are later allocated. 1139 */ 1140 mc->mc_data = NULL; 1141 mc->mc_flags = 0; 1142 mc->mc_complete = NULL; 1143 mc->mc_private = NULL; 1144 1145 /* 1146 * By default, we set up to overwrite the command packet with 1147 * sense information. 1148 */ 1149 mc->mc_packet->generic.sense_buffer_address = mc->mc_packetphys; 1150 mc->mc_packet->generic.maximum_sense_size = sizeof(union mly_command_packet); 1151 1152 mly_enqueue_free(mc); 1153 } 1154 1155 /******************************************************************************** 1156 * Map helper for command allocation. 1157 */ 1158 static void 1159 mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1160 { 1161 struct mly_softc *sc = (struct mly_softc *)arg 1162 1163 debug_called(2); 1164 1165 sc->mly_packetphys = segs[0].ds_addr; 1166 } 1167 1168 /******************************************************************************** 1169 * Allocate and initialise command and packet structures. 1170 */ 1171 static int 1172 mly_alloc_commands(struct mly_softc *sc) 1173 { 1174 struct mly_command *mc; 1175 int i; 1176 1177 /* 1178 * Allocate enough space for all the command packets in one chunk and 1179 * map them permanently into controller-visible space. 1180 */ 1181 if (bus_dmamem_alloc(sc->mly_packet_dmat, (void **)&sc->mly_packet, 1182 BUS_DMA_NOWAIT, &sc->mly_packetmap)) { 1183 return(ENOMEM); 1184 } 1185 bus_dmamap_load(sc->mly_packet_dmat, sc->mly_packetmap, sc->mly_packet, 1186 MLY_MAXCOMMANDS * sizeof(union mly_command_packet), 1187 mly_alloc_commands_map, sc, 0); 1188 1189 for (i = 0; i < MLY_MAXCOMMANDS; i++) { 1190 mc = &sc->mly_command[i]; 1191 bzero(mc, sizeof(*mc)); 1192 mc->mc_sc = sc; 1193 mc->mc_slot = MLY_SLOT_START + i; 1194 mc->mc_packet = sc->mly_packet + i; 1195 mc->mc_packetphys = sc->mly_packetphys + (i * sizeof(union mly_command_packet)); 1196 if (!bus_dmamap_create(sc->mly_buffer_dmat, 0, &mc->mc_datamap)) 1197 mly_release_command(mc); 1198 } 1199 return(0); 1200 } 1201 1202 /******************************************************************************** 1203 * Command-mapping helper function - populate this command's s/g table 1204 * with the s/g entries for its data. 1205 */ 1206 static void 1207 mly_map_command_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1208 { 1209 struct mly_command *mc = (struct mly_command *)arg; 1210 struct mly_softc *sc = mc->mc_sc; 1211 struct mly_command_generic *gen = &(mc->mc_packet->generic); 1212 struct mly_sg_entry *sg; 1213 int i, tabofs; 1214 1215 debug_called(3); 1216 1217 /* can we use the transfer structure directly? */ 1218 if (nseg <= 2) { 1219 sg = &gen->transfer.direct.sg[0]; 1220 gen->command_control.extended_sg_table = 0; 1221 } else { 1222 tabofs = ((mc->mc_slot - MLY_SLOT_START) * MLY_MAXSGENTRIES); 1223 sg = sc->mly_sg_table + tabofs; 1224 gen->transfer.indirect.entries[0] = nseg; 1225 gen->transfer.indirect.table_physaddr[0] = sc->mly_sg_busaddr + (tabofs * sizeof(struct mly_sg_entry)); 1226 gen->command_control.extended_sg_table = 1; 1227 } 1228 1229 /* copy the s/g table */ 1230 for (i = 0; i < nseg; i++) { 1231 sg[i].physaddr = segs[i].ds_addr; 1232 sg[i].length = segs[i].ds_len; 1233 } 1234 1235 } 1236 1237 #if 0 1238 /******************************************************************************** 1239 * Command-mapping helper function - save the cdb's physical address. 1240 * 1241 * We don't support 'large' SCSI commands at this time, so this is unused. 1242 */ 1243 static void 1244 mly_map_command_cdb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1245 { 1246 struct mly_command *mc = (struct mly_command *)arg; 1247 1248 debug_called(3); 1249 1250 /* XXX can we safely assume that a CDB will never cross a page boundary? */ 1251 if ((segs[0].ds_addr % PAGE_SIZE) > 1252 ((segs[0].ds_addr + mc->mc_packet->scsi_large.cdb_length) % PAGE_SIZE)) 1253 panic("cdb crosses page boundary"); 1254 1255 /* fix up fields in the command packet */ 1256 mc->mc_packet->scsi_large.cdb_physaddr = segs[0].ds_addr; 1257 } 1258 #endif 1259 1260 /******************************************************************************** 1261 * Map a command into controller-visible space 1262 */ 1263 static void 1264 mly_map_command(struct mly_command *mc) 1265 { 1266 struct mly_softc *sc = mc->mc_sc; 1267 1268 debug_called(2); 1269 1270 /* don't map more than once */ 1271 if (mc->mc_flags & MLY_CMD_MAPPED) 1272 return; 1273 1274 /* does the command have a data buffer? */ 1275 if (mc->mc_data != NULL) 1276 bus_dmamap_load(sc->mly_buffer_dmat, mc->mc_datamap, mc->mc_data, mc->mc_length, 1277 mly_map_command_sg, mc, 0); 1278 1279 if (mc->mc_flags & MLY_CMD_DATAIN) 1280 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREREAD); 1281 if (mc->mc_flags & MLY_CMD_DATAOUT) 1282 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREWRITE); 1283 1284 mc->mc_flags |= MLY_CMD_MAPPED; 1285 } 1286 1287 /******************************************************************************** 1288 * Unmap a command from controller-visible space 1289 */ 1290 static void 1291 mly_unmap_command(struct mly_command *mc) 1292 { 1293 struct mly_softc *sc = mc->mc_sc; 1294 1295 debug_called(2); 1296 1297 if (!(mc->mc_flags & MLY_CMD_MAPPED)) 1298 return; 1299 1300 if (mc->mc_flags & MLY_CMD_DATAIN) 1301 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTREAD); 1302 if (mc->mc_flags & MLY_CMD_DATAOUT) 1303 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTWRITE); 1304 1305 /* does the command have a data buffer? */ 1306 if (mc->mc_data != NULL) 1307 bus_dmamap_unload(sc->mly_buffer_dmat, mc->mc_datamap); 1308 1309 mc->mc_flags &= ~MLY_CMD_MAPPED; 1310 } 1311 1312 /******************************************************************************** 1313 ******************************************************************************** 1314 Hardware Control 1315 ******************************************************************************** 1316 ********************************************************************************/ 1317 1318 /******************************************************************************** 1319 * Handshake with the firmware while the card is being initialised. 1320 */ 1321 static int 1322 mly_fwhandshake(struct mly_softc *sc) 1323 { 1324 u_int8_t error, param0, param1; 1325 int spinup = 0; 1326 1327 debug_called(1); 1328 1329 /* set HM_STSACK and let the firmware initialise */ 1330 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 1331 DELAY(1000); /* too short? */ 1332 1333 /* if HM_STSACK is still true, the controller is initialising */ 1334 if (!MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) 1335 return(0); 1336 mly_printf(sc, "controller initialisation started\n"); 1337 1338 /* spin waiting for initialisation to finish, or for a message to be delivered */ 1339 while (MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) { 1340 /* check for a message */ 1341 if (MLY_ERROR_VALID(sc)) { 1342 error = MLY_GET_REG(sc, sc->mly_error_status) & ~MLY_MSG_EMPTY; 1343 param0 = MLY_GET_REG(sc, sc->mly_command_mailbox); 1344 param1 = MLY_GET_REG(sc, sc->mly_command_mailbox + 1); 1345 1346 switch(error) { 1347 case MLY_MSG_SPINUP: 1348 if (!spinup) { 1349 mly_printf(sc, "drive spinup in progress\n"); 1350 spinup = 1; /* only print this once (should print drive being spun?) */ 1351 } 1352 break; 1353 case MLY_MSG_RACE_RECOVERY_FAIL: 1354 mly_printf(sc, "mirror race recovery failed, one or more drives offline\n"); 1355 break; 1356 case MLY_MSG_RACE_IN_PROGRESS: 1357 mly_printf(sc, "mirror race recovery in progress\n"); 1358 break; 1359 case MLY_MSG_RACE_ON_CRITICAL: 1360 mly_printf(sc, "mirror race recovery on a critical drive\n"); 1361 break; 1362 case MLY_MSG_PARITY_ERROR: 1363 mly_printf(sc, "FATAL MEMORY PARITY ERROR\n"); 1364 return(ENXIO); 1365 default: 1366 mly_printf(sc, "unknown initialisation code 0x%x\n", error); 1367 } 1368 } 1369 } 1370 return(0); 1371 } 1372 1373 /******************************************************************************** 1374 ******************************************************************************** 1375 Debugging and Diagnostics 1376 ******************************************************************************** 1377 ********************************************************************************/ 1378 1379 /******************************************************************************** 1380 * Print some information about the controller. 1381 */ 1382 static void 1383 mly_describe_controller(struct mly_softc *sc) 1384 { 1385 struct mly_ioctl_getcontrollerinfo *mi = sc->mly_controllerinfo; 1386 1387 mly_printf(sc, "%16s, %d channel%s, firmware %d.%02d-%d-%02d (%02d%02d%02d%02d), %dMB RAM\n", 1388 mi->controller_name, mi->physical_channels_present, (mi->physical_channels_present) > 1 ? "s" : "", 1389 mi->fw_major, mi->fw_minor, mi->fw_turn, mi->fw_build, /* XXX turn encoding? */ 1390 mi->fw_century, mi->fw_year, mi->fw_month, mi->fw_day, 1391 mi->memory_size); 1392 1393 if (bootverbose) { 1394 mly_printf(sc, "%s %s (%x), %dMHz %d-bit %.16s\n", 1395 mly_describe_code(mly_table_oemname, mi->oem_information), 1396 mly_describe_code(mly_table_controllertype, mi->controller_type), mi->controller_type, 1397 mi->interface_speed, mi->interface_width, mi->interface_name); 1398 mly_printf(sc, "%dMB %dMHz %d-bit %s%s%s, cache %dMB\n", 1399 mi->memory_size, mi->memory_speed, mi->memory_width, 1400 mly_describe_code(mly_table_memorytype, mi->memory_type), 1401 mi->memory_parity ? "+parity": "",mi->memory_ecc ? "+ECC": "", 1402 mi->cache_size); 1403 mly_printf(sc, "CPU: %s @ %dMHZ\n", 1404 mly_describe_code(mly_table_cputype, mi->cpu[0].type), mi->cpu[0].speed); 1405 if (mi->l2cache_size != 0) 1406 mly_printf(sc, "%dKB L2 cache\n", mi->l2cache_size); 1407 if (mi->exmemory_size != 0) 1408 mly_printf(sc, "%dMB %dMHz %d-bit private %s%s%s\n", 1409 mi->exmemory_size, mi->exmemory_speed, mi->exmemory_width, 1410 mly_describe_code(mly_table_memorytype, mi->exmemory_type), 1411 mi->exmemory_parity ? "+parity": "",mi->exmemory_ecc ? "+ECC": ""); 1412 mly_printf(sc, "battery backup %s\n", mi->bbu_present ? "present" : "not installed"); 1413 mly_printf(sc, "maximum data transfer %d blocks, maximum sg entries/command %d\n", 1414 mi->maximum_block_count, mi->maximum_sg_entries); 1415 mly_printf(sc, "logical devices present/critical/offline %d/%d/%d\n", 1416 mi->logical_devices_present, mi->logical_devices_critical, mi->logical_devices_offline); 1417 mly_printf(sc, "physical devices present %d\n", 1418 mi->physical_devices_present); 1419 mly_printf(sc, "physical disks present/offline %d/%d\n", 1420 mi->physical_disks_present, mi->physical_disks_offline); 1421 mly_printf(sc, "%d physical channel%s, %d virtual channel%s of %d possible\n", 1422 mi->physical_channels_present, mi->physical_channels_present == 1 ? "" : "s", 1423 mi->virtual_channels_present, mi->virtual_channels_present == 1 ? "" : "s", 1424 mi->virtual_channels_possible); 1425 mly_printf(sc, "%d parallel commands supported\n", mi->maximum_parallel_commands); 1426 mly_printf(sc, "%dMB flash ROM, %d of %d maximum cycles\n", 1427 mi->flash_size, mi->flash_age, mi->flash_maximum_age); 1428 } 1429 } 1430 1431 #ifdef MLY_DEBUG 1432 /******************************************************************************** 1433 * Print some controller state 1434 */ 1435 static void 1436 mly_printstate(struct mly_softc *sc) 1437 { 1438 mly_printf(sc, "IDBR %02x ODBR %02x ERROR %02x (%x %x %x)\n", 1439 MLY_GET_REG(sc, sc->mly_idbr), 1440 MLY_GET_REG(sc, sc->mly_odbr), 1441 MLY_GET_REG(sc, sc->mly_error_status), 1442 sc->mly_idbr, 1443 sc->mly_odbr, 1444 sc->mly_error_status); 1445 mly_printf(sc, "IMASK %02x ISTATUS %02x\n", 1446 MLY_GET_REG(sc, sc->mly_interrupt_mask), 1447 MLY_GET_REG(sc, sc->mly_interrupt_status)); 1448 mly_printf(sc, "COMMAND %02x %02x %02x %02x %02x %02x %02x %02x\n", 1449 MLY_GET_REG(sc, sc->mly_command_mailbox), 1450 MLY_GET_REG(sc, sc->mly_command_mailbox + 1), 1451 MLY_GET_REG(sc, sc->mly_command_mailbox + 2), 1452 MLY_GET_REG(sc, sc->mly_command_mailbox + 3), 1453 MLY_GET_REG(sc, sc->mly_command_mailbox + 4), 1454 MLY_GET_REG(sc, sc->mly_command_mailbox + 5), 1455 MLY_GET_REG(sc, sc->mly_command_mailbox + 6), 1456 MLY_GET_REG(sc, sc->mly_command_mailbox + 7)); 1457 mly_printf(sc, "STATUS %02x %02x %02x %02x %02x %02x %02x %02x\n", 1458 MLY_GET_REG(sc, sc->mly_status_mailbox), 1459 MLY_GET_REG(sc, sc->mly_status_mailbox + 1), 1460 MLY_GET_REG(sc, sc->mly_status_mailbox + 2), 1461 MLY_GET_REG(sc, sc->mly_status_mailbox + 3), 1462 MLY_GET_REG(sc, sc->mly_status_mailbox + 4), 1463 MLY_GET_REG(sc, sc->mly_status_mailbox + 5), 1464 MLY_GET_REG(sc, sc->mly_status_mailbox + 6), 1465 MLY_GET_REG(sc, sc->mly_status_mailbox + 7)); 1466 mly_printf(sc, " %04x %08x\n", 1467 MLY_GET_REG2(sc, sc->mly_status_mailbox), 1468 MLY_GET_REG4(sc, sc->mly_status_mailbox + 4)); 1469 } 1470 1471 struct mly_softc *mly_softc0 = NULL; 1472 void 1473 mly_printstate0(void) 1474 { 1475 if (mly_softc0 != NULL) 1476 mly_printstate(mly_softc0); 1477 } 1478 1479 /******************************************************************************** 1480 * Print a command 1481 */ 1482 static void 1483 mly_print_command(struct mly_command *mc) 1484 { 1485 struct mly_softc *sc = mc->mc_sc; 1486 1487 mly_printf(sc, "COMMAND @ %p\n", mc); 1488 mly_printf(sc, " slot %d\n", mc->mc_slot); 1489 mly_printf(sc, " status 0x%x\n", mc->mc_status); 1490 mly_printf(sc, " sense len %d\n", mc->mc_sense); 1491 mly_printf(sc, " resid %d\n", mc->mc_resid); 1492 mly_printf(sc, " packet %p/0x%llx\n", mc->mc_packet, mc->mc_packetphys); 1493 if (mc->mc_packet != NULL) 1494 mly_print_packet(mc); 1495 mly_printf(sc, " data %p/%d\n", mc->mc_data, mc->mc_length); 1496 mly_printf(sc, " flags %b\n", mc->mc_flags, "\20\1busy\2complete\3slotted\4mapped\5datain\6dataout\n"); 1497 mly_printf(sc, " complete %p\n", mc->mc_complete); 1498 mly_printf(sc, " private %p\n", mc->mc_private); 1499 } 1500 1501 /******************************************************************************** 1502 * Print a command packet 1503 */ 1504 static void 1505 mly_print_packet(struct mly_command *mc) 1506 { 1507 struct mly_softc *sc = mc->mc_sc; 1508 struct mly_command_generic *ge = (struct mly_command_generic *)mc->mc_packet; 1509 struct mly_command_scsi_small *ss = (struct mly_command_scsi_small *)mc->mc_packet; 1510 struct mly_command_scsi_large *sl = (struct mly_command_scsi_large *)mc->mc_packet; 1511 struct mly_command_ioctl *io = (struct mly_command_ioctl *)mc->mc_packet; 1512 int transfer; 1513 1514 mly_printf(sc, " command_id %d\n", ge->command_id); 1515 mly_printf(sc, " opcode %d\n", ge->opcode); 1516 mly_printf(sc, " command_control fua %d dpo %d est %d dd %s nas %d ddis %d\n", 1517 ge->command_control.force_unit_access, 1518 ge->command_control.disable_page_out, 1519 ge->command_control.extended_sg_table, 1520 (ge->command_control.data_direction == MLY_CCB_WRITE) ? "WRITE" : "READ", 1521 ge->command_control.no_auto_sense, 1522 ge->command_control.disable_disconnect); 1523 mly_printf(sc, " data_size %d\n", ge->data_size); 1524 mly_printf(sc, " sense_buffer_address 0x%llx\n", ge->sense_buffer_address); 1525 mly_printf(sc, " lun %d\n", ge->addr.phys.lun); 1526 mly_printf(sc, " target %d\n", ge->addr.phys.target); 1527 mly_printf(sc, " channel %d\n", ge->addr.phys.channel); 1528 mly_printf(sc, " logical device %d\n", ge->addr.log.logdev); 1529 mly_printf(sc, " controller %d\n", ge->addr.phys.controller); 1530 mly_printf(sc, " timeout %d %s\n", 1531 ge->timeout.value, 1532 (ge->timeout.scale == MLY_TIMEOUT_SECONDS) ? "seconds" : 1533 ((ge->timeout.scale == MLY_TIMEOUT_MINUTES) ? "minutes" : "hours")); 1534 mly_printf(sc, " maximum_sense_size %d\n", ge->maximum_sense_size); 1535 switch(ge->opcode) { 1536 case MDACMD_SCSIPT: 1537 case MDACMD_SCSI: 1538 mly_printf(sc, " cdb length %d\n", ss->cdb_length); 1539 mly_printf(sc, " cdb %*D\n", ss->cdb_length, ss->cdb, " "); 1540 transfer = 1; 1541 break; 1542 case MDACMD_SCSILC: 1543 case MDACMD_SCSILCPT: 1544 mly_printf(sc, " cdb length %d\n", sl->cdb_length); 1545 mly_printf(sc, " cdb 0x%llx\n", sl->cdb_physaddr); 1546 transfer = 1; 1547 break; 1548 case MDACMD_IOCTL: 1549 mly_printf(sc, " sub_ioctl 0x%x\n", io->sub_ioctl); 1550 switch(io->sub_ioctl) { 1551 case MDACIOCTL_SETMEMORYMAILBOX: 1552 mly_printf(sc, " health_buffer_size %d\n", 1553 io->param.setmemorymailbox.health_buffer_size); 1554 mly_printf(sc, " health_buffer_phys 0x%llx\n", 1555 io->param.setmemorymailbox.health_buffer_physaddr); 1556 mly_printf(sc, " command_mailbox 0x%llx\n", 1557 io->param.setmemorymailbox.command_mailbox_physaddr); 1558 mly_printf(sc, " status_mailbox 0x%llx\n", 1559 io->param.setmemorymailbox.status_mailbox_physaddr); 1560 transfer = 0; 1561 break; 1562 1563 case MDACIOCTL_SETREALTIMECLOCK: 1564 case MDACIOCTL_GETHEALTHSTATUS: 1565 case MDACIOCTL_GETCONTROLLERINFO: 1566 case MDACIOCTL_GETLOGDEVINFOVALID: 1567 case MDACIOCTL_GETPHYSDEVINFOVALID: 1568 case MDACIOCTL_GETPHYSDEVSTATISTICS: 1569 case MDACIOCTL_GETLOGDEVSTATISTICS: 1570 case MDACIOCTL_GETCONTROLLERSTATISTICS: 1571 case MDACIOCTL_GETBDT_FOR_SYSDRIVE: 1572 case MDACIOCTL_CREATENEWCONF: 1573 case MDACIOCTL_ADDNEWCONF: 1574 case MDACIOCTL_GETDEVCONFINFO: 1575 case MDACIOCTL_GETFREESPACELIST: 1576 case MDACIOCTL_MORE: 1577 case MDACIOCTL_SETPHYSDEVPARAMETER: 1578 case MDACIOCTL_GETPHYSDEVPARAMETER: 1579 case MDACIOCTL_GETLOGDEVPARAMETER: 1580 case MDACIOCTL_SETLOGDEVPARAMETER: 1581 mly_printf(sc, " param %10D\n", io->param.data.param, " "); 1582 transfer = 1; 1583 break; 1584 1585 case MDACIOCTL_GETEVENT: 1586 mly_printf(sc, " event %d\n", 1587 io->param.getevent.sequence_number_low + ((u_int32_t)io->addr.log.logdev << 16)); 1588 transfer = 1; 1589 break; 1590 1591 case MDACIOCTL_SETRAIDDEVSTATE: 1592 mly_printf(sc, " state %d\n", io->param.setraiddevstate.state); 1593 transfer = 0; 1594 break; 1595 1596 case MDACIOCTL_XLATEPHYSDEVTORAIDDEV: 1597 mly_printf(sc, " raid_device %d\n", io->param.xlatephysdevtoraiddev.raid_device); 1598 mly_printf(sc, " controller %d\n", io->param.xlatephysdevtoraiddev.controller); 1599 mly_printf(sc, " channel %d\n", io->param.xlatephysdevtoraiddev.channel); 1600 mly_printf(sc, " target %d\n", io->param.xlatephysdevtoraiddev.target); 1601 mly_printf(sc, " lun %d\n", io->param.xlatephysdevtoraiddev.lun); 1602 transfer = 0; 1603 break; 1604 1605 case MDACIOCTL_GETGROUPCONFINFO: 1606 mly_printf(sc, " group %d\n", io->param.getgroupconfinfo.group); 1607 transfer = 1; 1608 break; 1609 1610 case MDACIOCTL_GET_SUBSYSTEM_DATA: 1611 case MDACIOCTL_SET_SUBSYSTEM_DATA: 1612 case MDACIOCTL_STARTDISOCVERY: 1613 case MDACIOCTL_INITPHYSDEVSTART: 1614 case MDACIOCTL_INITPHYSDEVSTOP: 1615 case MDACIOCTL_INITRAIDDEVSTART: 1616 case MDACIOCTL_INITRAIDDEVSTOP: 1617 case MDACIOCTL_REBUILDRAIDDEVSTART: 1618 case MDACIOCTL_REBUILDRAIDDEVSTOP: 1619 case MDACIOCTL_MAKECONSISTENTDATASTART: 1620 case MDACIOCTL_MAKECONSISTENTDATASTOP: 1621 case MDACIOCTL_CONSISTENCYCHECKSTART: 1622 case MDACIOCTL_CONSISTENCYCHECKSTOP: 1623 case MDACIOCTL_RESETDEVICE: 1624 case MDACIOCTL_FLUSHDEVICEDATA: 1625 case MDACIOCTL_PAUSEDEVICE: 1626 case MDACIOCTL_UNPAUSEDEVICE: 1627 case MDACIOCTL_LOCATEDEVICE: 1628 case MDACIOCTL_SETMASTERSLAVEMODE: 1629 case MDACIOCTL_DELETERAIDDEV: 1630 case MDACIOCTL_REPLACEINTERNALDEV: 1631 case MDACIOCTL_CLEARCONF: 1632 case MDACIOCTL_GETCONTROLLERPARAMETER: 1633 case MDACIOCTL_SETCONTRLLERPARAMETER: 1634 case MDACIOCTL_CLEARCONFSUSPMODE: 1635 case MDACIOCTL_STOREIMAGE: 1636 case MDACIOCTL_READIMAGE: 1637 case MDACIOCTL_FLASHIMAGES: 1638 case MDACIOCTL_RENAMERAIDDEV: 1639 default: /* no idea what to print */ 1640 transfer = 0; 1641 break; 1642 } 1643 break; 1644 1645 case MDACMD_IOCTLCHECK: 1646 case MDACMD_MEMCOPY: 1647 default: 1648 transfer = 0; 1649 break; /* print nothing */ 1650 } 1651 if (transfer) { 1652 if (ge->command_control.extended_sg_table) { 1653 mly_printf(sc, " sg table 0x%llx/%d\n", 1654 ge->transfer.indirect.table_physaddr[0], ge->transfer.indirect.entries[0]); 1655 } else { 1656 mly_printf(sc, " 0000 0x%llx/%lld\n", 1657 ge->transfer.direct.sg[0].physaddr, ge->transfer.direct.sg[0].length); 1658 mly_printf(sc, " 0001 0x%llx/%lld\n", 1659 ge->transfer.direct.sg[1].physaddr, ge->transfer.direct.sg[1].length); 1660 } 1661 } 1662 } 1663 1664 /******************************************************************************** 1665 * Panic in a slightly informative fashion 1666 */ 1667 static void 1668 mly_panic(struct mly_softc *sc, char *reason) 1669 { 1670 mly_printstate(sc); 1671 panic(reason); 1672 } 1673 #endif 1674 1675 /******************************************************************************** 1676 * Print queue statistics, callable from DDB. 1677 */ 1678 void 1679 mly_print_controller(int controller) 1680 { 1681 struct mly_softc *sc; 1682 1683 if ((sc = devclass_get_softc(devclass_find("mly"), controller)) == NULL) { 1684 printf("mly: controller %d invalid\n", controller); 1685 } else { 1686 device_printf(sc->mly_dev, "queue curr max\n"); 1687 device_printf(sc->mly_dev, "free %04d/%04d\n", 1688 sc->mly_qstat[MLYQ_FREE].q_length, sc->mly_qstat[MLYQ_FREE].q_max); 1689 device_printf(sc->mly_dev, "ready %04d/%04d\n", 1690 sc->mly_qstat[MLYQ_READY].q_length, sc->mly_qstat[MLYQ_READY].q_max); 1691 device_printf(sc->mly_dev, "busy %04d/%04d\n", 1692 sc->mly_qstat[MLYQ_BUSY].q_length, sc->mly_qstat[MLYQ_BUSY].q_max); 1693 device_printf(sc->mly_dev, "complete %04d/%04d\n", 1694 sc->mly_qstat[MLYQ_COMPLETE].q_length, sc->mly_qstat[MLYQ_COMPLETE].q_max); 1695 } 1696 } 1697 1698 1699 /******************************************************************************** 1700 ******************************************************************************** 1701 Control device interface 1702 ******************************************************************************** 1703 ********************************************************************************/ 1704 1705 /******************************************************************************** 1706 * Accept an open operation on the control device. 1707 */ 1708 static int 1709 mly_user_open(dev_t dev, int flags, int fmt, d_thread_t *td) 1710 { 1711 int unit = minor(dev); 1712 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 1713 1714 sc->mly_state |= MLY_STATE_OPEN; 1715 return(0); 1716 } 1717 1718 /******************************************************************************** 1719 * Accept the last close on the control device. 1720 */ 1721 static int 1722 mly_user_close(dev_t dev, int flags, int fmt, d_thread_t *td) 1723 { 1724 int unit = minor(dev); 1725 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 1726 1727 sc->mly_state &= ~MLY_STATE_OPEN; 1728 return (0); 1729 } 1730 1731 /******************************************************************************** 1732 * Handle controller-specific control operations. 1733 */ 1734 static int 1735 mly_user_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, d_thread_t *td) 1736 { 1737 struct mly_softc *sc = (struct mly_softc *)dev->si_drv1; 1738 struct mly_user_command *uc = (struct mly_user_command *)addr; 1739 struct mly_user_health *uh = (struct mly_user_health *)addr; 1740 1741 switch(cmd) { 1742 case MLYIO_COMMAND: 1743 return(mly_user_command(sc, uc)); 1744 case MLYIO_HEALTH: 1745 return(mly_user_health(sc, uh)); 1746 default: 1747 return(ENOIOCTL); 1748 } 1749 } 1750 1751 /******************************************************************************** 1752 * Execute a command passed in from userspace. 1753 * 1754 * The control structure contains the actual command for the controller, as well 1755 * as the user-space data pointer and data size, and an optional sense buffer 1756 * size/pointer. On completion, the data size is adjusted to the command 1757 * residual, and the sense buffer size to the size of the returned sense data. 1758 * 1759 */ 1760 static int 1761 mly_user_command(struct mly_softc *sc, struct mly_user_command *uc) 1762 { 1763 struct mly_command *mc; 1764 int error; 1765 1766 /* allocate a command */ 1767 if (mly_alloc_command(sc, &mc)) { 1768 error = ENOMEM; 1769 goto out; /* XXX Linux version will wait for a command */ 1770 } 1771 1772 /* handle data size/direction */ 1773 mc->mc_length = (uc->DataTransferLength >= 0) ? uc->DataTransferLength : -uc->DataTransferLength; 1774 if (mc->mc_length > 0) 1775 mc->mc_data = malloc(mc->mc_length, M_DEVBUF, M_INTWAIT); 1776 if (uc->DataTransferLength > 0) { 1777 mc->mc_flags |= MLY_CMD_DATAIN; 1778 bzero(mc->mc_data, mc->mc_length); 1779 } 1780 if (uc->DataTransferLength < 0) { 1781 mc->mc_flags |= MLY_CMD_DATAOUT; 1782 if ((error = copyin(uc->DataTransferBuffer, mc->mc_data, mc->mc_length)) != 0) 1783 goto out; 1784 } 1785 1786 /* copy the controller command */ 1787 bcopy(&uc->CommandMailbox, mc->mc_packet, sizeof(uc->CommandMailbox)); 1788 1789 /* clear command completion handler so that we get woken up */ 1790 mc->mc_complete = NULL; 1791 1792 /* execute the command */ 1793 crit_enter(); 1794 mly_requeue_ready(mc); 1795 mly_startio(sc); 1796 while (!(mc->mc_flags & MLY_CMD_COMPLETE)) 1797 tsleep(mc, 0, "mlyioctl", 0); 1798 crit_exit(); 1799 1800 /* return the data to userspace */ 1801 if (uc->DataTransferLength > 0) 1802 if ((error = copyout(mc->mc_data, uc->DataTransferBuffer, mc->mc_length)) != 0) 1803 goto out; 1804 1805 /* return the sense buffer to userspace */ 1806 if ((uc->RequestSenseLength > 0) && (mc->mc_sense > 0)) { 1807 if ((error = copyout(mc->mc_packet, uc->RequestSenseBuffer, 1808 min(uc->RequestSenseLength, mc->mc_sense))) != 0) 1809 goto out; 1810 } 1811 1812 /* return command results to userspace (caller will copy out) */ 1813 uc->DataTransferLength = mc->mc_resid; 1814 uc->RequestSenseLength = min(uc->RequestSenseLength, mc->mc_sense); 1815 uc->CommandStatus = mc->mc_status; 1816 error = 0; 1817 1818 out: 1819 if (mc->mc_data != NULL) 1820 free(mc->mc_data, M_DEVBUF); 1821 if (mc != NULL) 1822 mly_release_command(mc); 1823 return(error); 1824 } 1825 1826 /******************************************************************************** 1827 * Return health status to userspace. If the health change index in the user 1828 * structure does not match that currently exported by the controller, we 1829 * return the current status immediately. Otherwise, we block until either 1830 * interrupted or new status is delivered. 1831 */ 1832 static int 1833 mly_user_health(struct mly_softc *sc, struct mly_user_health *uh) 1834 { 1835 struct mly_health_status mh; 1836 int error; 1837 1838 /* fetch the current health status from userspace */ 1839 if ((error = copyin(uh->HealthStatusBuffer, &mh, sizeof(mh))) != 0) 1840 return(error); 1841 1842 /* spin waiting for a status update */ 1843 crit_enter(); 1844 error = EWOULDBLOCK; 1845 while ((error != 0) && (sc->mly_event_change == mh.change_counter)) 1846 error = tsleep(&sc->mly_event_change, PCATCH, "mlyhealth", 0); 1847 crit_exit(); 1848 1849 /* copy the controller's health status buffer out (there is a race here if it changes again) */ 1850 error = copyout(&sc->mly_mmbox->mmm_health.status, uh->HealthStatusBuffer, 1851 sizeof(uh->HealthStatusBuffer)); 1852 return(error); 1853 } 1854