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 1.10 2004/06/21 15:39:31 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 <bus/cam/scsi/scsi_all.h> 47 48 #include "mlyreg.h" 49 #include "mlyio.h" 50 #include "mlyvar.h" 51 #define MLY_DEFINE_TABLES 52 #include "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 /* name */ "mly", 98 /* cmaj */ MLY_CDEV_MAJOR, 99 /* flags */ 0, 100 /* port */ NULL, 101 /* clone */ NULL, 102 103 mly_user_open, 104 mly_user_close, 105 noread, 106 nowrite, 107 mly_user_ioctl, 108 nopoll, 109 nommap, 110 nostrategy, 111 nodump, 112 nopsize 113 }; 114 115 /******************************************************************************** 116 ******************************************************************************** 117 Device Interface 118 ******************************************************************************** 119 ********************************************************************************/ 120 121 /******************************************************************************** 122 * Initialise the controller and softc 123 */ 124 int 125 mly_attach(struct mly_softc *sc) 126 { 127 int error; 128 129 debug_called(1); 130 131 /* 132 * Initialise per-controller queues. 133 */ 134 mly_initq_free(sc); 135 mly_initq_ready(sc); 136 mly_initq_busy(sc); 137 mly_initq_complete(sc); 138 139 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005 140 /* 141 * Initialise command-completion task. 142 */ 143 TASK_INIT(&sc->mly_task_complete, 0, mly_complete, sc); 144 #endif 145 146 /* disable interrupts before we start talking to the controller */ 147 MLY_MASK_INTERRUPTS(sc); 148 149 /* 150 * Wait for the controller to come ready, handshake with the firmware if required. 151 * This is typically only necessary on platforms where the controller BIOS does not 152 * run. 153 */ 154 if ((error = mly_fwhandshake(sc))) 155 return(error); 156 157 /* 158 * Allocate command buffers 159 */ 160 if ((error = mly_alloc_commands(sc))) 161 return(error); 162 163 /* 164 * Obtain controller feature information 165 */ 166 if ((error = mly_get_controllerinfo(sc))) 167 return(error); 168 169 /* 170 * Get the current event counter for health purposes, populate the initial 171 * health status buffer. 172 */ 173 if ((error = mly_get_eventstatus(sc))) 174 return(error); 175 176 /* 177 * Enable memory-mailbox mode 178 */ 179 if ((error = mly_enable_mmbox(sc))) 180 return(error); 181 182 /* 183 * Attach to CAM. 184 */ 185 if ((error = mly_cam_attach(sc))) 186 return(error); 187 188 /* 189 * Print a little information about the controller 190 */ 191 mly_describe_controller(sc); 192 193 /* 194 * Mark all attached devices for rescan 195 */ 196 mly_scan_devices(sc); 197 198 /* 199 * Instigate the first status poll immediately. Rescan completions won't 200 * happen until interrupts are enabled, which should still be before 201 * the SCSI subsystem gets to us. (XXX assuming CAM and interrupt-driven 202 * discovery here...) 203 */ 204 mly_periodic((void *)sc); 205 206 /* 207 * Create the control device. 208 */ 209 cdevsw_add(&mly_cdevsw, -1, device_get_unit(sc->mly_dev)); 210 sc->mly_dev_t = make_dev(&mly_cdevsw, device_get_unit(sc->mly_dev), 211 UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR, 212 "mly%d", device_get_unit(sc->mly_dev)); 213 sc->mly_dev_t->si_drv1 = sc; 214 215 /* enable interrupts now */ 216 MLY_UNMASK_INTERRUPTS(sc); 217 218 return(0); 219 } 220 221 /******************************************************************************** 222 * Bring the controller to a state where it can be safely left alone. 223 */ 224 void 225 mly_detach(struct mly_softc *sc) 226 { 227 228 debug_called(1); 229 230 /* kill the periodic event */ 231 untimeout(mly_periodic, sc, sc->mly_periodic); 232 233 sc->mly_state |= MLY_STATE_SUSPEND; 234 235 /* flush controller */ 236 mly_printf(sc, "flushing cache..."); 237 printf("%s\n", mly_flush(sc) ? "failed" : "done"); 238 239 MLY_MASK_INTERRUPTS(sc); 240 } 241 242 /******************************************************************************** 243 ******************************************************************************** 244 Command Wrappers 245 ******************************************************************************** 246 ********************************************************************************/ 247 248 /******************************************************************************** 249 * Fill in the mly_controllerinfo and mly_controllerparam fields in the softc. 250 */ 251 static int 252 mly_get_controllerinfo(struct mly_softc *sc) 253 { 254 struct mly_command_ioctl mci; 255 u_int8_t status; 256 int error; 257 258 debug_called(1); 259 260 if (sc->mly_controllerinfo != NULL) 261 free(sc->mly_controllerinfo, M_DEVBUF); 262 263 /* build the getcontrollerinfo ioctl and send it */ 264 bzero(&mci, sizeof(mci)); 265 sc->mly_controllerinfo = NULL; 266 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERINFO; 267 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerinfo, sizeof(*sc->mly_controllerinfo), 268 &status, NULL, NULL))) 269 return(error); 270 if (status != 0) 271 return(EIO); 272 273 if (sc->mly_controllerparam != NULL) 274 free(sc->mly_controllerparam, M_DEVBUF); 275 276 /* build the getcontrollerparameter ioctl and send it */ 277 bzero(&mci, sizeof(mci)); 278 sc->mly_controllerparam = NULL; 279 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERPARAMETER; 280 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerparam, sizeof(*sc->mly_controllerparam), 281 &status, NULL, NULL))) 282 return(error); 283 if (status != 0) 284 return(EIO); 285 286 return(0); 287 } 288 289 /******************************************************************************** 290 * Schedule all possible devices for a rescan. 291 * 292 */ 293 static void 294 mly_scan_devices(struct mly_softc *sc) 295 { 296 int bus, target, nchn; 297 298 debug_called(1); 299 300 /* 301 * Clear any previous BTL information. 302 */ 303 bzero(&sc->mly_btl, sizeof(sc->mly_btl)); 304 305 /* 306 * Mark all devices as requiring a rescan, and let the early periodic scan collect them. 307 */ 308 nchn = sc->mly_controllerinfo->physical_channels_present + 309 sc->mly_controllerinfo->virtual_channels_present; 310 for (bus = 0; bus < nchn; bus++) 311 for (target = 0; target < MLY_MAX_TARGETS; target++) 312 sc->mly_btl[bus][target].mb_flags = MLY_BTL_RESCAN; 313 314 } 315 316 /******************************************************************************** 317 * Rescan a device, possibly as a consequence of getting an event which suggests 318 * that it may have changed. 319 */ 320 static void 321 mly_rescan_btl(struct mly_softc *sc, int bus, int target) 322 { 323 struct mly_command *mc; 324 struct mly_command_ioctl *mci; 325 326 debug_called(2); 327 328 /* get a command */ 329 mc = NULL; 330 if (mly_alloc_command(sc, &mc)) 331 return; /* we'll be retried soon */ 332 333 /* set up the data buffer */ 334 mc->mc_data = malloc(sizeof(union mly_devinfo), M_DEVBUF, M_INTWAIT | M_ZERO); 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 mc->mc_data = malloc(datasize, M_DEVBUF, M_INTWAIT); 569 mc->mc_flags |= MLY_CMD_DATAIN; 570 } else { 571 mc->mc_data = *data; 572 mc->mc_flags |= MLY_CMD_DATAOUT; 573 } 574 mc->mc_length = datasize; 575 mc->mc_packet->generic.data_size = datasize; 576 } 577 578 /* run the command */ 579 if ((error = mly_immediate_command(mc))) 580 goto out; 581 582 /* clean up and return any data */ 583 *status = mc->mc_status; 584 if ((mc->mc_sense > 0) && (sense_buffer != NULL)) { 585 bcopy(mc->mc_packet, sense_buffer, mc->mc_sense); 586 *sense_length = mc->mc_sense; 587 goto out; 588 } 589 590 /* should we return a data pointer? */ 591 if ((data != NULL) && (*data == NULL)) 592 *data = mc->mc_data; 593 594 /* command completed OK */ 595 error = 0; 596 597 out: 598 if (mc != NULL) { 599 /* do we need to free a data buffer we allocated? */ 600 if (error && (mc->mc_data != NULL) && (*data == NULL)) 601 free(mc->mc_data, M_DEVBUF); 602 mly_release_command(mc); 603 } 604 return(error); 605 } 606 607 /******************************************************************************** 608 * Fetch one event from the controller. 609 */ 610 static void 611 mly_fetch_event(struct mly_softc *sc) 612 { 613 struct mly_command *mc; 614 struct mly_command_ioctl *mci; 615 int s; 616 u_int32_t event; 617 618 debug_called(2); 619 620 /* get a command */ 621 mc = NULL; 622 if (mly_alloc_command(sc, &mc)) 623 return; /* we'll get retried the next time a command completes */ 624 625 /* set up the data buffer */ 626 mc->mc_data = malloc(sizeof(struct mly_event), M_DEVBUF, M_INTWAIT|M_ZERO); 627 mc->mc_length = sizeof(struct mly_event); 628 mc->mc_flags |= MLY_CMD_DATAIN; 629 mc->mc_complete = mly_complete_event; 630 631 /* 632 * Get an event number to fetch. It's possible that we've raced with another 633 * context for the last event, in which case there will be no more events. 634 */ 635 s = splcam(); 636 if (sc->mly_event_counter == sc->mly_event_waiting) { 637 mly_release_command(mc); 638 splx(s); 639 return; 640 } 641 event = sc->mly_event_counter++; 642 splx(s); 643 644 /* 645 * Build the ioctl. 646 * 647 * At this point we are committed to sending this request, as it 648 * will be the only one constructed for this particular event number. 649 */ 650 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl; 651 mci->opcode = MDACMD_IOCTL; 652 mci->data_size = sizeof(struct mly_event); 653 mci->addr.phys.lun = (event >> 16) & 0xff; 654 mci->addr.phys.target = (event >> 24) & 0xff; 655 mci->addr.phys.channel = 0; 656 mci->addr.phys.controller = 0; 657 mci->timeout.value = 30; 658 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 659 mci->sub_ioctl = MDACIOCTL_GETEVENT; 660 mci->param.getevent.sequence_number_low = event & 0xffff; 661 662 debug(2, "fetch event %u", event); 663 664 /* 665 * Use the ready queue to get this command dispatched. 666 */ 667 mly_enqueue_ready(mc); 668 mly_startio(sc); 669 } 670 671 /******************************************************************************** 672 * Handle the completion of an event poll. 673 * 674 * Note that we don't actually have to instigate another poll; the completion of 675 * this command will trigger that if there are any more events to poll for. 676 */ 677 static void 678 mly_complete_event(struct mly_command *mc) 679 { 680 struct mly_softc *sc = mc->mc_sc; 681 struct mly_event *me = (struct mly_event *)mc->mc_data; 682 683 debug_called(2); 684 685 /* 686 * If the event was successfully fetched, process it. 687 */ 688 if (mc->mc_status == SCSI_STATUS_OK) { 689 mly_process_event(sc, me); 690 free(me, M_DEVBUF); 691 } 692 mly_release_command(mc); 693 } 694 695 /******************************************************************************** 696 * Process a controller event. 697 */ 698 static void 699 mly_process_event(struct mly_softc *sc, struct mly_event *me) 700 { 701 struct scsi_sense_data *ssd = (struct scsi_sense_data *)&me->sense[0]; 702 char *fp, *tp; 703 int bus, target, event, class, action; 704 705 /* 706 * Errors can be reported using vendor-unique sense data. In this case, the 707 * event code will be 0x1c (Request sense data present), the sense key will 708 * be 0x09 (vendor specific), the MSB of the ASC will be set, and the 709 * actual event code will be a 16-bit value comprised of the ASCQ (low byte) 710 * and low seven bits of the ASC (low seven bits of the high byte). 711 */ 712 if ((me->code == 0x1c) && 713 ((ssd->flags & SSD_KEY) == SSD_KEY_Vendor_Specific) && 714 (ssd->add_sense_code & 0x80)) { 715 event = ((int)(ssd->add_sense_code & ~0x80) << 8) + ssd->add_sense_code_qual; 716 } else { 717 event = me->code; 718 } 719 720 /* look up event, get codes */ 721 fp = mly_describe_code(mly_table_event, event); 722 723 debug(2, "Event %d code 0x%x", me->sequence_number, me->code); 724 725 /* quiet event? */ 726 class = fp[0]; 727 if (isupper(class) && bootverbose) 728 class = tolower(class); 729 730 /* get action code, text string */ 731 action = fp[1]; 732 tp = &fp[2]; 733 734 /* 735 * Print some information about the event. 736 * 737 * This code uses a table derived from the corresponding portion of the Linux 738 * driver, and thus the parser is very similar. 739 */ 740 switch(class) { 741 case 'p': /* error on physical device */ 742 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp); 743 if (action == 'r') 744 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN; 745 break; 746 case 'l': /* error on logical unit */ 747 case 'm': /* message about logical unit */ 748 bus = MLY_LOGDEV_BUS(sc, me->lun); 749 target = MLY_LOGDEV_TARGET(me->lun); 750 mly_name_device(sc, bus, target); 751 mly_printf(sc, "logical device %d (%s) %s\n", me->lun, sc->mly_btl[bus][target].mb_name, tp); 752 if (action == 'r') 753 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_RESCAN; 754 break; 755 break; 756 case 's': /* report of sense data */ 757 if (((ssd->flags & SSD_KEY) == SSD_KEY_NO_SENSE) || 758 (((ssd->flags & SSD_KEY) == SSD_KEY_NOT_READY) && 759 (ssd->add_sense_code == 0x04) && 760 ((ssd->add_sense_code_qual == 0x01) || (ssd->add_sense_code_qual == 0x02)))) 761 break; /* ignore NO_SENSE or NOT_READY in one case */ 762 763 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp); 764 mly_printf(sc, " sense key %d asc %02x ascq %02x\n", 765 ssd->flags & SSD_KEY, ssd->add_sense_code, ssd->add_sense_code_qual); 766 mly_printf(sc, " info %4D csi %4D\n", ssd->info, "", ssd->cmd_spec_info, ""); 767 if (action == 'r') 768 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN; 769 break; 770 case 'e': 771 mly_printf(sc, tp, me->target, me->lun); 772 break; 773 case 'c': 774 mly_printf(sc, "controller %s\n", tp); 775 break; 776 case '?': 777 mly_printf(sc, "%s - %d\n", tp, me->code); 778 break; 779 default: /* probably a 'noisy' event being ignored */ 780 break; 781 } 782 } 783 784 /******************************************************************************** 785 * Perform periodic activities. 786 */ 787 static void 788 mly_periodic(void *data) 789 { 790 struct mly_softc *sc = (struct mly_softc *)data; 791 int nchn, bus, target; 792 793 debug_called(2); 794 795 /* 796 * Scan devices. 797 */ 798 nchn = sc->mly_controllerinfo->physical_channels_present + 799 sc->mly_controllerinfo->virtual_channels_present; 800 for (bus = 0; bus < nchn; bus++) { 801 for (target = 0; target < MLY_MAX_TARGETS; target++) { 802 803 /* ignore the controller in this scan */ 804 if (target == sc->mly_controllerparam->initiator_id) 805 continue; 806 807 /* perform device rescan? */ 808 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_RESCAN) 809 mly_rescan_btl(sc, bus, target); 810 } 811 } 812 813 sc->mly_periodic = timeout(mly_periodic, sc, hz); 814 } 815 816 /******************************************************************************** 817 ******************************************************************************** 818 Command Processing 819 ******************************************************************************** 820 ********************************************************************************/ 821 822 /******************************************************************************** 823 * Run a command and wait for it to complete. 824 * 825 */ 826 static int 827 mly_immediate_command(struct mly_command *mc) 828 { 829 struct mly_softc *sc = mc->mc_sc; 830 int error, s; 831 832 debug_called(2); 833 834 /* spinning at splcam is ugly, but we're only used during controller init */ 835 s = splcam(); 836 if ((error = mly_start(mc))) 837 return(error); 838 839 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) { 840 /* sleep on the command */ 841 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) { 842 tsleep(mc, 0, "mlywait", 0); 843 } 844 } else { 845 /* spin and collect status while we do */ 846 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) { 847 mly_done(mc->mc_sc); 848 } 849 } 850 splx(s); 851 return(0); 852 } 853 854 /******************************************************************************** 855 * Start as much queued I/O as possible on the controller 856 */ 857 void 858 mly_startio(struct mly_softc *sc) 859 { 860 struct mly_command *mc; 861 862 debug_called(2); 863 864 for (;;) { 865 866 /* try for a ready command */ 867 mc = mly_dequeue_ready(sc); 868 869 /* try to build a command from a queued ccb */ 870 if (!mc) 871 mly_cam_command(sc, &mc); 872 873 /* no command == nothing to do */ 874 if (!mc) 875 break; 876 877 /* try to post the command */ 878 if (mly_start(mc)) { 879 /* controller busy, or no resources - defer for later */ 880 mly_requeue_ready(mc); 881 break; 882 } 883 } 884 } 885 886 /******************************************************************************** 887 * Deliver a command to the controller; allocate controller resources at the 888 * last moment. 889 */ 890 static int 891 mly_start(struct mly_command *mc) 892 { 893 struct mly_softc *sc = mc->mc_sc; 894 union mly_command_packet *pkt; 895 int s; 896 897 debug_called(2); 898 899 /* 900 * Set the command up for delivery to the controller. 901 */ 902 mly_map_command(mc); 903 mc->mc_packet->generic.command_id = mc->mc_slot; 904 905 s = splcam(); 906 907 /* 908 * Do we have to use the hardware mailbox? 909 */ 910 if (!(sc->mly_state & MLY_STATE_MMBOX_ACTIVE)) { 911 /* 912 * Check to see if the controller is ready for us. 913 */ 914 if (MLY_IDBR_TRUE(sc, MLY_HM_CMDSENT)) { 915 splx(s); 916 return(EBUSY); 917 } 918 mc->mc_flags |= MLY_CMD_BUSY; 919 920 /* 921 * It's ready, send the command. 922 */ 923 MLY_SET_MBOX(sc, sc->mly_command_mailbox, &mc->mc_packetphys); 924 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_CMDSENT); 925 926 } else { /* use memory-mailbox mode */ 927 928 pkt = &sc->mly_mmbox->mmm_command[sc->mly_mmbox_command_index]; 929 930 /* check to see if the next index is free yet */ 931 if (pkt->mmbox.flag != 0) { 932 splx(s); 933 return(EBUSY); 934 } 935 mc->mc_flags |= MLY_CMD_BUSY; 936 937 /* copy in new command */ 938 bcopy(mc->mc_packet->mmbox.data, pkt->mmbox.data, sizeof(pkt->mmbox.data)); 939 /* barrier to ensure completion of previous write before we write the flag */ 940 bus_space_barrier(NULL, NULL, 0, 0, BUS_SPACE_BARRIER_WRITE); /* tag/handle? */ 941 /* copy flag last */ 942 pkt->mmbox.flag = mc->mc_packet->mmbox.flag; 943 /* barrier to ensure completion of previous write before we notify the controller */ 944 bus_space_barrier(NULL, NULL, 0, 0, BUS_SPACE_BARRIER_WRITE); /* tag/handle */ 945 946 /* signal controller, update index */ 947 MLY_SET_REG(sc, sc->mly_idbr, MLY_AM_CMDSENT); 948 sc->mly_mmbox_command_index = (sc->mly_mmbox_command_index + 1) % MLY_MMBOX_COMMANDS; 949 } 950 951 mly_enqueue_busy(mc); 952 splx(s); 953 return(0); 954 } 955 956 /******************************************************************************** 957 * Pick up command status from the controller, schedule a completion event 958 */ 959 void 960 mly_done(struct mly_softc *sc) 961 { 962 struct mly_command *mc; 963 union mly_status_packet *sp; 964 u_int16_t slot; 965 int s, worked; 966 967 s = splcam(); 968 worked = 0; 969 970 /* pick up hardware-mailbox commands */ 971 if (MLY_ODBR_TRUE(sc, MLY_HM_STSREADY)) { 972 slot = MLY_GET_REG2(sc, sc->mly_status_mailbox); 973 if (slot < MLY_SLOT_MAX) { 974 mc = &sc->mly_command[slot - MLY_SLOT_START]; 975 mc->mc_status = MLY_GET_REG(sc, sc->mly_status_mailbox + 2); 976 mc->mc_sense = MLY_GET_REG(sc, sc->mly_status_mailbox + 3); 977 mc->mc_resid = MLY_GET_REG4(sc, sc->mly_status_mailbox + 4); 978 mly_remove_busy(mc); 979 mc->mc_flags &= ~MLY_CMD_BUSY; 980 mly_enqueue_complete(mc); 981 worked = 1; 982 } else { 983 /* slot 0xffff may mean "extremely bogus command" */ 984 mly_printf(sc, "got HM completion for illegal slot %u\n", slot); 985 } 986 /* unconditionally acknowledge status */ 987 MLY_SET_REG(sc, sc->mly_odbr, MLY_HM_STSREADY); 988 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 989 } 990 991 /* pick up memory-mailbox commands */ 992 if (MLY_ODBR_TRUE(sc, MLY_AM_STSREADY)) { 993 for (;;) { 994 sp = &sc->mly_mmbox->mmm_status[sc->mly_mmbox_status_index]; 995 996 /* check for more status */ 997 if (sp->mmbox.flag == 0) 998 break; 999 1000 /* get slot number */ 1001 slot = sp->status.command_id; 1002 if (slot < MLY_SLOT_MAX) { 1003 mc = &sc->mly_command[slot - MLY_SLOT_START]; 1004 mc->mc_status = sp->status.status; 1005 mc->mc_sense = sp->status.sense_length; 1006 mc->mc_resid = sp->status.residue; 1007 mly_remove_busy(mc); 1008 mc->mc_flags &= ~MLY_CMD_BUSY; 1009 mly_enqueue_complete(mc); 1010 worked = 1; 1011 } else { 1012 /* slot 0xffff may mean "extremely bogus command" */ 1013 mly_printf(sc, "got AM completion for illegal slot %u at %d\n", 1014 slot, sc->mly_mmbox_status_index); 1015 } 1016 1017 /* clear and move to next index */ 1018 sp->mmbox.flag = 0; 1019 sc->mly_mmbox_status_index = (sc->mly_mmbox_status_index + 1) % MLY_MMBOX_STATUS; 1020 } 1021 /* acknowledge that we have collected status value(s) */ 1022 MLY_SET_REG(sc, sc->mly_odbr, MLY_AM_STSREADY); 1023 } 1024 1025 splx(s); 1026 if (worked) { 1027 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005 1028 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) 1029 taskqueue_enqueue(taskqueue_swi, &sc->mly_task_complete); 1030 else 1031 #endif 1032 mly_complete(sc, 0); 1033 } 1034 } 1035 1036 /******************************************************************************** 1037 * Process completed commands 1038 */ 1039 static void 1040 mly_complete(void *context, int pending) 1041 { 1042 struct mly_softc *sc = (struct mly_softc *)context; 1043 struct mly_command *mc; 1044 void (* mc_complete)(struct mly_command *mc); 1045 1046 1047 debug_called(2); 1048 1049 /* 1050 * Spin pulling commands off the completed queue and processing them. 1051 */ 1052 while ((mc = mly_dequeue_complete(sc)) != NULL) { 1053 1054 /* 1055 * Free controller resources, mark command complete. 1056 * 1057 * Note that as soon as we mark the command complete, it may be freed 1058 * out from under us, so we need to save the mc_complete field in 1059 * order to later avoid dereferencing mc. (We would not expect to 1060 * have a polling/sleeping consumer with mc_complete != NULL). 1061 */ 1062 mly_unmap_command(mc); 1063 mc_complete = mc->mc_complete; 1064 mc->mc_flags |= MLY_CMD_COMPLETE; 1065 1066 /* 1067 * Call completion handler or wake up sleeping consumer. 1068 */ 1069 if (mc_complete != NULL) { 1070 mc_complete(mc); 1071 } else { 1072 wakeup(mc); 1073 } 1074 } 1075 1076 /* 1077 * We may have freed up controller resources which would allow us 1078 * to push more commands onto the controller, so we check here. 1079 */ 1080 mly_startio(sc); 1081 1082 /* 1083 * The controller may have updated the health status information, 1084 * so check for it here. 1085 * 1086 * Note that we only check for health status after a completed command. It 1087 * might be wise to ping the controller occasionally if it's been idle for 1088 * a while just to check up on it. While a filesystem is mounted, or I/O is 1089 * active this isn't really an issue. 1090 */ 1091 if (sc->mly_mmbox->mmm_health.status.change_counter != sc->mly_event_change) { 1092 sc->mly_event_change = sc->mly_mmbox->mmm_health.status.change_counter; 1093 debug(1, "event change %d, event status update, %d -> %d", sc->mly_event_change, 1094 sc->mly_event_waiting, sc->mly_mmbox->mmm_health.status.next_event); 1095 sc->mly_event_waiting = sc->mly_mmbox->mmm_health.status.next_event; 1096 1097 /* wake up anyone that might be interested in this */ 1098 wakeup(&sc->mly_event_change); 1099 } 1100 if (sc->mly_event_counter != sc->mly_event_waiting) 1101 mly_fetch_event(sc); 1102 } 1103 1104 /******************************************************************************** 1105 ******************************************************************************** 1106 Command Buffer Management 1107 ******************************************************************************** 1108 ********************************************************************************/ 1109 1110 /******************************************************************************** 1111 * Allocate a command. 1112 */ 1113 int 1114 mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp) 1115 { 1116 struct mly_command *mc; 1117 1118 debug_called(3); 1119 1120 if ((mc = mly_dequeue_free(sc)) == NULL) 1121 return(ENOMEM); 1122 1123 *mcp = mc; 1124 return(0); 1125 } 1126 1127 /******************************************************************************** 1128 * Release a command back to the freelist. 1129 */ 1130 void 1131 mly_release_command(struct mly_command *mc) 1132 { 1133 debug_called(3); 1134 1135 /* 1136 * Fill in parts of the command that may cause confusion if 1137 * a consumer doesn't when we are later allocated. 1138 */ 1139 mc->mc_data = NULL; 1140 mc->mc_flags = 0; 1141 mc->mc_complete = NULL; 1142 mc->mc_private = NULL; 1143 1144 /* 1145 * By default, we set up to overwrite the command packet with 1146 * sense information. 1147 */ 1148 mc->mc_packet->generic.sense_buffer_address = mc->mc_packetphys; 1149 mc->mc_packet->generic.maximum_sense_size = sizeof(union mly_command_packet); 1150 1151 mly_enqueue_free(mc); 1152 } 1153 1154 /******************************************************************************** 1155 * Map helper for command allocation. 1156 */ 1157 static void 1158 mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1159 { 1160 struct mly_softc *sc = (struct mly_softc *)arg 1161 1162 debug_called(2); 1163 1164 sc->mly_packetphys = segs[0].ds_addr; 1165 } 1166 1167 /******************************************************************************** 1168 * Allocate and initialise command and packet structures. 1169 */ 1170 static int 1171 mly_alloc_commands(struct mly_softc *sc) 1172 { 1173 struct mly_command *mc; 1174 int i; 1175 1176 /* 1177 * Allocate enough space for all the command packets in one chunk and 1178 * map them permanently into controller-visible space. 1179 */ 1180 if (bus_dmamem_alloc(sc->mly_packet_dmat, (void **)&sc->mly_packet, 1181 BUS_DMA_NOWAIT, &sc->mly_packetmap)) { 1182 return(ENOMEM); 1183 } 1184 bus_dmamap_load(sc->mly_packet_dmat, sc->mly_packetmap, sc->mly_packet, 1185 MLY_MAXCOMMANDS * sizeof(union mly_command_packet), 1186 mly_alloc_commands_map, sc, 0); 1187 1188 for (i = 0; i < MLY_MAXCOMMANDS; i++) { 1189 mc = &sc->mly_command[i]; 1190 bzero(mc, sizeof(*mc)); 1191 mc->mc_sc = sc; 1192 mc->mc_slot = MLY_SLOT_START + i; 1193 mc->mc_packet = sc->mly_packet + i; 1194 mc->mc_packetphys = sc->mly_packetphys + (i * sizeof(union mly_command_packet)); 1195 if (!bus_dmamap_create(sc->mly_buffer_dmat, 0, &mc->mc_datamap)) 1196 mly_release_command(mc); 1197 } 1198 return(0); 1199 } 1200 1201 /******************************************************************************** 1202 * Command-mapping helper function - populate this command's s/g table 1203 * with the s/g entries for its data. 1204 */ 1205 static void 1206 mly_map_command_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1207 { 1208 struct mly_command *mc = (struct mly_command *)arg; 1209 struct mly_softc *sc = mc->mc_sc; 1210 struct mly_command_generic *gen = &(mc->mc_packet->generic); 1211 struct mly_sg_entry *sg; 1212 int i, tabofs; 1213 1214 debug_called(3); 1215 1216 /* can we use the transfer structure directly? */ 1217 if (nseg <= 2) { 1218 sg = &gen->transfer.direct.sg[0]; 1219 gen->command_control.extended_sg_table = 0; 1220 } else { 1221 tabofs = ((mc->mc_slot - MLY_SLOT_START) * MLY_MAXSGENTRIES); 1222 sg = sc->mly_sg_table + tabofs; 1223 gen->transfer.indirect.entries[0] = nseg; 1224 gen->transfer.indirect.table_physaddr[0] = sc->mly_sg_busaddr + (tabofs * sizeof(struct mly_sg_entry)); 1225 gen->command_control.extended_sg_table = 1; 1226 } 1227 1228 /* copy the s/g table */ 1229 for (i = 0; i < nseg; i++) { 1230 sg[i].physaddr = segs[i].ds_addr; 1231 sg[i].length = segs[i].ds_len; 1232 } 1233 1234 } 1235 1236 #if 0 1237 /******************************************************************************** 1238 * Command-mapping helper function - save the cdb's physical address. 1239 * 1240 * We don't support 'large' SCSI commands at this time, so this is unused. 1241 */ 1242 static void 1243 mly_map_command_cdb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1244 { 1245 struct mly_command *mc = (struct mly_command *)arg; 1246 1247 debug_called(3); 1248 1249 /* XXX can we safely assume that a CDB will never cross a page boundary? */ 1250 if ((segs[0].ds_addr % PAGE_SIZE) > 1251 ((segs[0].ds_addr + mc->mc_packet->scsi_large.cdb_length) % PAGE_SIZE)) 1252 panic("cdb crosses page boundary"); 1253 1254 /* fix up fields in the command packet */ 1255 mc->mc_packet->scsi_large.cdb_physaddr = segs[0].ds_addr; 1256 } 1257 #endif 1258 1259 /******************************************************************************** 1260 * Map a command into controller-visible space 1261 */ 1262 static void 1263 mly_map_command(struct mly_command *mc) 1264 { 1265 struct mly_softc *sc = mc->mc_sc; 1266 1267 debug_called(2); 1268 1269 /* don't map more than once */ 1270 if (mc->mc_flags & MLY_CMD_MAPPED) 1271 return; 1272 1273 /* does the command have a data buffer? */ 1274 if (mc->mc_data != NULL) 1275 bus_dmamap_load(sc->mly_buffer_dmat, mc->mc_datamap, mc->mc_data, mc->mc_length, 1276 mly_map_command_sg, mc, 0); 1277 1278 if (mc->mc_flags & MLY_CMD_DATAIN) 1279 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREREAD); 1280 if (mc->mc_flags & MLY_CMD_DATAOUT) 1281 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREWRITE); 1282 1283 mc->mc_flags |= MLY_CMD_MAPPED; 1284 } 1285 1286 /******************************************************************************** 1287 * Unmap a command from controller-visible space 1288 */ 1289 static void 1290 mly_unmap_command(struct mly_command *mc) 1291 { 1292 struct mly_softc *sc = mc->mc_sc; 1293 1294 debug_called(2); 1295 1296 if (!(mc->mc_flags & MLY_CMD_MAPPED)) 1297 return; 1298 1299 if (mc->mc_flags & MLY_CMD_DATAIN) 1300 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTREAD); 1301 if (mc->mc_flags & MLY_CMD_DATAOUT) 1302 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTWRITE); 1303 1304 /* does the command have a data buffer? */ 1305 if (mc->mc_data != NULL) 1306 bus_dmamap_unload(sc->mly_buffer_dmat, mc->mc_datamap); 1307 1308 mc->mc_flags &= ~MLY_CMD_MAPPED; 1309 } 1310 1311 /******************************************************************************** 1312 ******************************************************************************** 1313 Hardware Control 1314 ******************************************************************************** 1315 ********************************************************************************/ 1316 1317 /******************************************************************************** 1318 * Handshake with the firmware while the card is being initialised. 1319 */ 1320 static int 1321 mly_fwhandshake(struct mly_softc *sc) 1322 { 1323 u_int8_t error, param0, param1; 1324 int spinup = 0; 1325 1326 debug_called(1); 1327 1328 /* set HM_STSACK and let the firmware initialise */ 1329 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 1330 DELAY(1000); /* too short? */ 1331 1332 /* if HM_STSACK is still true, the controller is initialising */ 1333 if (!MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) 1334 return(0); 1335 mly_printf(sc, "controller initialisation started\n"); 1336 1337 /* spin waiting for initialisation to finish, or for a message to be delivered */ 1338 while (MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) { 1339 /* check for a message */ 1340 if (MLY_ERROR_VALID(sc)) { 1341 error = MLY_GET_REG(sc, sc->mly_error_status) & ~MLY_MSG_EMPTY; 1342 param0 = MLY_GET_REG(sc, sc->mly_command_mailbox); 1343 param1 = MLY_GET_REG(sc, sc->mly_command_mailbox + 1); 1344 1345 switch(error) { 1346 case MLY_MSG_SPINUP: 1347 if (!spinup) { 1348 mly_printf(sc, "drive spinup in progress\n"); 1349 spinup = 1; /* only print this once (should print drive being spun?) */ 1350 } 1351 break; 1352 case MLY_MSG_RACE_RECOVERY_FAIL: 1353 mly_printf(sc, "mirror race recovery failed, one or more drives offline\n"); 1354 break; 1355 case MLY_MSG_RACE_IN_PROGRESS: 1356 mly_printf(sc, "mirror race recovery in progress\n"); 1357 break; 1358 case MLY_MSG_RACE_ON_CRITICAL: 1359 mly_printf(sc, "mirror race recovery on a critical drive\n"); 1360 break; 1361 case MLY_MSG_PARITY_ERROR: 1362 mly_printf(sc, "FATAL MEMORY PARITY ERROR\n"); 1363 return(ENXIO); 1364 default: 1365 mly_printf(sc, "unknown initialisation code 0x%x\n", error); 1366 } 1367 } 1368 } 1369 return(0); 1370 } 1371 1372 /******************************************************************************** 1373 ******************************************************************************** 1374 Debugging and Diagnostics 1375 ******************************************************************************** 1376 ********************************************************************************/ 1377 1378 /******************************************************************************** 1379 * Print some information about the controller. 1380 */ 1381 static void 1382 mly_describe_controller(struct mly_softc *sc) 1383 { 1384 struct mly_ioctl_getcontrollerinfo *mi = sc->mly_controllerinfo; 1385 1386 mly_printf(sc, "%16s, %d channel%s, firmware %d.%02d-%d-%02d (%02d%02d%02d%02d), %dMB RAM\n", 1387 mi->controller_name, mi->physical_channels_present, (mi->physical_channels_present) > 1 ? "s" : "", 1388 mi->fw_major, mi->fw_minor, mi->fw_turn, mi->fw_build, /* XXX turn encoding? */ 1389 mi->fw_century, mi->fw_year, mi->fw_month, mi->fw_day, 1390 mi->memory_size); 1391 1392 if (bootverbose) { 1393 mly_printf(sc, "%s %s (%x), %dMHz %d-bit %.16s\n", 1394 mly_describe_code(mly_table_oemname, mi->oem_information), 1395 mly_describe_code(mly_table_controllertype, mi->controller_type), mi->controller_type, 1396 mi->interface_speed, mi->interface_width, mi->interface_name); 1397 mly_printf(sc, "%dMB %dMHz %d-bit %s%s%s, cache %dMB\n", 1398 mi->memory_size, mi->memory_speed, mi->memory_width, 1399 mly_describe_code(mly_table_memorytype, mi->memory_type), 1400 mi->memory_parity ? "+parity": "",mi->memory_ecc ? "+ECC": "", 1401 mi->cache_size); 1402 mly_printf(sc, "CPU: %s @ %dMHZ\n", 1403 mly_describe_code(mly_table_cputype, mi->cpu[0].type), mi->cpu[0].speed); 1404 if (mi->l2cache_size != 0) 1405 mly_printf(sc, "%dKB L2 cache\n", mi->l2cache_size); 1406 if (mi->exmemory_size != 0) 1407 mly_printf(sc, "%dMB %dMHz %d-bit private %s%s%s\n", 1408 mi->exmemory_size, mi->exmemory_speed, mi->exmemory_width, 1409 mly_describe_code(mly_table_memorytype, mi->exmemory_type), 1410 mi->exmemory_parity ? "+parity": "",mi->exmemory_ecc ? "+ECC": ""); 1411 mly_printf(sc, "battery backup %s\n", mi->bbu_present ? "present" : "not installed"); 1412 mly_printf(sc, "maximum data transfer %d blocks, maximum sg entries/command %d\n", 1413 mi->maximum_block_count, mi->maximum_sg_entries); 1414 mly_printf(sc, "logical devices present/critical/offline %d/%d/%d\n", 1415 mi->logical_devices_present, mi->logical_devices_critical, mi->logical_devices_offline); 1416 mly_printf(sc, "physical devices present %d\n", 1417 mi->physical_devices_present); 1418 mly_printf(sc, "physical disks present/offline %d/%d\n", 1419 mi->physical_disks_present, mi->physical_disks_offline); 1420 mly_printf(sc, "%d physical channel%s, %d virtual channel%s of %d possible\n", 1421 mi->physical_channels_present, mi->physical_channels_present == 1 ? "" : "s", 1422 mi->virtual_channels_present, mi->virtual_channels_present == 1 ? "" : "s", 1423 mi->virtual_channels_possible); 1424 mly_printf(sc, "%d parallel commands supported\n", mi->maximum_parallel_commands); 1425 mly_printf(sc, "%dMB flash ROM, %d of %d maximum cycles\n", 1426 mi->flash_size, mi->flash_age, mi->flash_maximum_age); 1427 } 1428 } 1429 1430 #ifdef MLY_DEBUG 1431 /******************************************************************************** 1432 * Print some controller state 1433 */ 1434 static void 1435 mly_printstate(struct mly_softc *sc) 1436 { 1437 mly_printf(sc, "IDBR %02x ODBR %02x ERROR %02x (%x %x %x)\n", 1438 MLY_GET_REG(sc, sc->mly_idbr), 1439 MLY_GET_REG(sc, sc->mly_odbr), 1440 MLY_GET_REG(sc, sc->mly_error_status), 1441 sc->mly_idbr, 1442 sc->mly_odbr, 1443 sc->mly_error_status); 1444 mly_printf(sc, "IMASK %02x ISTATUS %02x\n", 1445 MLY_GET_REG(sc, sc->mly_interrupt_mask), 1446 MLY_GET_REG(sc, sc->mly_interrupt_status)); 1447 mly_printf(sc, "COMMAND %02x %02x %02x %02x %02x %02x %02x %02x\n", 1448 MLY_GET_REG(sc, sc->mly_command_mailbox), 1449 MLY_GET_REG(sc, sc->mly_command_mailbox + 1), 1450 MLY_GET_REG(sc, sc->mly_command_mailbox + 2), 1451 MLY_GET_REG(sc, sc->mly_command_mailbox + 3), 1452 MLY_GET_REG(sc, sc->mly_command_mailbox + 4), 1453 MLY_GET_REG(sc, sc->mly_command_mailbox + 5), 1454 MLY_GET_REG(sc, sc->mly_command_mailbox + 6), 1455 MLY_GET_REG(sc, sc->mly_command_mailbox + 7)); 1456 mly_printf(sc, "STATUS %02x %02x %02x %02x %02x %02x %02x %02x\n", 1457 MLY_GET_REG(sc, sc->mly_status_mailbox), 1458 MLY_GET_REG(sc, sc->mly_status_mailbox + 1), 1459 MLY_GET_REG(sc, sc->mly_status_mailbox + 2), 1460 MLY_GET_REG(sc, sc->mly_status_mailbox + 3), 1461 MLY_GET_REG(sc, sc->mly_status_mailbox + 4), 1462 MLY_GET_REG(sc, sc->mly_status_mailbox + 5), 1463 MLY_GET_REG(sc, sc->mly_status_mailbox + 6), 1464 MLY_GET_REG(sc, sc->mly_status_mailbox + 7)); 1465 mly_printf(sc, " %04x %08x\n", 1466 MLY_GET_REG2(sc, sc->mly_status_mailbox), 1467 MLY_GET_REG4(sc, sc->mly_status_mailbox + 4)); 1468 } 1469 1470 struct mly_softc *mly_softc0 = NULL; 1471 void 1472 mly_printstate0(void) 1473 { 1474 if (mly_softc0 != NULL) 1475 mly_printstate(mly_softc0); 1476 } 1477 1478 /******************************************************************************** 1479 * Print a command 1480 */ 1481 static void 1482 mly_print_command(struct mly_command *mc) 1483 { 1484 struct mly_softc *sc = mc->mc_sc; 1485 1486 mly_printf(sc, "COMMAND @ %p\n", mc); 1487 mly_printf(sc, " slot %d\n", mc->mc_slot); 1488 mly_printf(sc, " status 0x%x\n", mc->mc_status); 1489 mly_printf(sc, " sense len %d\n", mc->mc_sense); 1490 mly_printf(sc, " resid %d\n", mc->mc_resid); 1491 mly_printf(sc, " packet %p/0x%llx\n", mc->mc_packet, mc->mc_packetphys); 1492 if (mc->mc_packet != NULL) 1493 mly_print_packet(mc); 1494 mly_printf(sc, " data %p/%d\n", mc->mc_data, mc->mc_length); 1495 mly_printf(sc, " flags %b\n", mc->mc_flags, "\20\1busy\2complete\3slotted\4mapped\5datain\6dataout\n"); 1496 mly_printf(sc, " complete %p\n", mc->mc_complete); 1497 mly_printf(sc, " private %p\n", mc->mc_private); 1498 } 1499 1500 /******************************************************************************** 1501 * Print a command packet 1502 */ 1503 static void 1504 mly_print_packet(struct mly_command *mc) 1505 { 1506 struct mly_softc *sc = mc->mc_sc; 1507 struct mly_command_generic *ge = (struct mly_command_generic *)mc->mc_packet; 1508 struct mly_command_scsi_small *ss = (struct mly_command_scsi_small *)mc->mc_packet; 1509 struct mly_command_scsi_large *sl = (struct mly_command_scsi_large *)mc->mc_packet; 1510 struct mly_command_ioctl *io = (struct mly_command_ioctl *)mc->mc_packet; 1511 int transfer; 1512 1513 mly_printf(sc, " command_id %d\n", ge->command_id); 1514 mly_printf(sc, " opcode %d\n", ge->opcode); 1515 mly_printf(sc, " command_control fua %d dpo %d est %d dd %s nas %d ddis %d\n", 1516 ge->command_control.force_unit_access, 1517 ge->command_control.disable_page_out, 1518 ge->command_control.extended_sg_table, 1519 (ge->command_control.data_direction == MLY_CCB_WRITE) ? "WRITE" : "READ", 1520 ge->command_control.no_auto_sense, 1521 ge->command_control.disable_disconnect); 1522 mly_printf(sc, " data_size %d\n", ge->data_size); 1523 mly_printf(sc, " sense_buffer_address 0x%llx\n", ge->sense_buffer_address); 1524 mly_printf(sc, " lun %d\n", ge->addr.phys.lun); 1525 mly_printf(sc, " target %d\n", ge->addr.phys.target); 1526 mly_printf(sc, " channel %d\n", ge->addr.phys.channel); 1527 mly_printf(sc, " logical device %d\n", ge->addr.log.logdev); 1528 mly_printf(sc, " controller %d\n", ge->addr.phys.controller); 1529 mly_printf(sc, " timeout %d %s\n", 1530 ge->timeout.value, 1531 (ge->timeout.scale == MLY_TIMEOUT_SECONDS) ? "seconds" : 1532 ((ge->timeout.scale == MLY_TIMEOUT_MINUTES) ? "minutes" : "hours")); 1533 mly_printf(sc, " maximum_sense_size %d\n", ge->maximum_sense_size); 1534 switch(ge->opcode) { 1535 case MDACMD_SCSIPT: 1536 case MDACMD_SCSI: 1537 mly_printf(sc, " cdb length %d\n", ss->cdb_length); 1538 mly_printf(sc, " cdb %*D\n", ss->cdb_length, ss->cdb, " "); 1539 transfer = 1; 1540 break; 1541 case MDACMD_SCSILC: 1542 case MDACMD_SCSILCPT: 1543 mly_printf(sc, " cdb length %d\n", sl->cdb_length); 1544 mly_printf(sc, " cdb 0x%llx\n", sl->cdb_physaddr); 1545 transfer = 1; 1546 break; 1547 case MDACMD_IOCTL: 1548 mly_printf(sc, " sub_ioctl 0x%x\n", io->sub_ioctl); 1549 switch(io->sub_ioctl) { 1550 case MDACIOCTL_SETMEMORYMAILBOX: 1551 mly_printf(sc, " health_buffer_size %d\n", 1552 io->param.setmemorymailbox.health_buffer_size); 1553 mly_printf(sc, " health_buffer_phys 0x%llx\n", 1554 io->param.setmemorymailbox.health_buffer_physaddr); 1555 mly_printf(sc, " command_mailbox 0x%llx\n", 1556 io->param.setmemorymailbox.command_mailbox_physaddr); 1557 mly_printf(sc, " status_mailbox 0x%llx\n", 1558 io->param.setmemorymailbox.status_mailbox_physaddr); 1559 transfer = 0; 1560 break; 1561 1562 case MDACIOCTL_SETREALTIMECLOCK: 1563 case MDACIOCTL_GETHEALTHSTATUS: 1564 case MDACIOCTL_GETCONTROLLERINFO: 1565 case MDACIOCTL_GETLOGDEVINFOVALID: 1566 case MDACIOCTL_GETPHYSDEVINFOVALID: 1567 case MDACIOCTL_GETPHYSDEVSTATISTICS: 1568 case MDACIOCTL_GETLOGDEVSTATISTICS: 1569 case MDACIOCTL_GETCONTROLLERSTATISTICS: 1570 case MDACIOCTL_GETBDT_FOR_SYSDRIVE: 1571 case MDACIOCTL_CREATENEWCONF: 1572 case MDACIOCTL_ADDNEWCONF: 1573 case MDACIOCTL_GETDEVCONFINFO: 1574 case MDACIOCTL_GETFREESPACELIST: 1575 case MDACIOCTL_MORE: 1576 case MDACIOCTL_SETPHYSDEVPARAMETER: 1577 case MDACIOCTL_GETPHYSDEVPARAMETER: 1578 case MDACIOCTL_GETLOGDEVPARAMETER: 1579 case MDACIOCTL_SETLOGDEVPARAMETER: 1580 mly_printf(sc, " param %10D\n", io->param.data.param, " "); 1581 transfer = 1; 1582 break; 1583 1584 case MDACIOCTL_GETEVENT: 1585 mly_printf(sc, " event %d\n", 1586 io->param.getevent.sequence_number_low + ((u_int32_t)io->addr.log.logdev << 16)); 1587 transfer = 1; 1588 break; 1589 1590 case MDACIOCTL_SETRAIDDEVSTATE: 1591 mly_printf(sc, " state %d\n", io->param.setraiddevstate.state); 1592 transfer = 0; 1593 break; 1594 1595 case MDACIOCTL_XLATEPHYSDEVTORAIDDEV: 1596 mly_printf(sc, " raid_device %d\n", io->param.xlatephysdevtoraiddev.raid_device); 1597 mly_printf(sc, " controller %d\n", io->param.xlatephysdevtoraiddev.controller); 1598 mly_printf(sc, " channel %d\n", io->param.xlatephysdevtoraiddev.channel); 1599 mly_printf(sc, " target %d\n", io->param.xlatephysdevtoraiddev.target); 1600 mly_printf(sc, " lun %d\n", io->param.xlatephysdevtoraiddev.lun); 1601 transfer = 0; 1602 break; 1603 1604 case MDACIOCTL_GETGROUPCONFINFO: 1605 mly_printf(sc, " group %d\n", io->param.getgroupconfinfo.group); 1606 transfer = 1; 1607 break; 1608 1609 case MDACIOCTL_GET_SUBSYSTEM_DATA: 1610 case MDACIOCTL_SET_SUBSYSTEM_DATA: 1611 case MDACIOCTL_STARTDISOCVERY: 1612 case MDACIOCTL_INITPHYSDEVSTART: 1613 case MDACIOCTL_INITPHYSDEVSTOP: 1614 case MDACIOCTL_INITRAIDDEVSTART: 1615 case MDACIOCTL_INITRAIDDEVSTOP: 1616 case MDACIOCTL_REBUILDRAIDDEVSTART: 1617 case MDACIOCTL_REBUILDRAIDDEVSTOP: 1618 case MDACIOCTL_MAKECONSISTENTDATASTART: 1619 case MDACIOCTL_MAKECONSISTENTDATASTOP: 1620 case MDACIOCTL_CONSISTENCYCHECKSTART: 1621 case MDACIOCTL_CONSISTENCYCHECKSTOP: 1622 case MDACIOCTL_RESETDEVICE: 1623 case MDACIOCTL_FLUSHDEVICEDATA: 1624 case MDACIOCTL_PAUSEDEVICE: 1625 case MDACIOCTL_UNPAUSEDEVICE: 1626 case MDACIOCTL_LOCATEDEVICE: 1627 case MDACIOCTL_SETMASTERSLAVEMODE: 1628 case MDACIOCTL_DELETERAIDDEV: 1629 case MDACIOCTL_REPLACEINTERNALDEV: 1630 case MDACIOCTL_CLEARCONF: 1631 case MDACIOCTL_GETCONTROLLERPARAMETER: 1632 case MDACIOCTL_SETCONTRLLERPARAMETER: 1633 case MDACIOCTL_CLEARCONFSUSPMODE: 1634 case MDACIOCTL_STOREIMAGE: 1635 case MDACIOCTL_READIMAGE: 1636 case MDACIOCTL_FLASHIMAGES: 1637 case MDACIOCTL_RENAMERAIDDEV: 1638 default: /* no idea what to print */ 1639 transfer = 0; 1640 break; 1641 } 1642 break; 1643 1644 case MDACMD_IOCTLCHECK: 1645 case MDACMD_MEMCOPY: 1646 default: 1647 transfer = 0; 1648 break; /* print nothing */ 1649 } 1650 if (transfer) { 1651 if (ge->command_control.extended_sg_table) { 1652 mly_printf(sc, " sg table 0x%llx/%d\n", 1653 ge->transfer.indirect.table_physaddr[0], ge->transfer.indirect.entries[0]); 1654 } else { 1655 mly_printf(sc, " 0000 0x%llx/%lld\n", 1656 ge->transfer.direct.sg[0].physaddr, ge->transfer.direct.sg[0].length); 1657 mly_printf(sc, " 0001 0x%llx/%lld\n", 1658 ge->transfer.direct.sg[1].physaddr, ge->transfer.direct.sg[1].length); 1659 } 1660 } 1661 } 1662 1663 /******************************************************************************** 1664 * Panic in a slightly informative fashion 1665 */ 1666 static void 1667 mly_panic(struct mly_softc *sc, char *reason) 1668 { 1669 mly_printstate(sc); 1670 panic(reason); 1671 } 1672 #endif 1673 1674 /******************************************************************************** 1675 * Print queue statistics, callable from DDB. 1676 */ 1677 void 1678 mly_print_controller(int controller) 1679 { 1680 struct mly_softc *sc; 1681 1682 if ((sc = devclass_get_softc(devclass_find("mly"), controller)) == NULL) { 1683 printf("mly: controller %d invalid\n", controller); 1684 } else { 1685 device_printf(sc->mly_dev, "queue curr max\n"); 1686 device_printf(sc->mly_dev, "free %04d/%04d\n", 1687 sc->mly_qstat[MLYQ_FREE].q_length, sc->mly_qstat[MLYQ_FREE].q_max); 1688 device_printf(sc->mly_dev, "ready %04d/%04d\n", 1689 sc->mly_qstat[MLYQ_READY].q_length, sc->mly_qstat[MLYQ_READY].q_max); 1690 device_printf(sc->mly_dev, "busy %04d/%04d\n", 1691 sc->mly_qstat[MLYQ_BUSY].q_length, sc->mly_qstat[MLYQ_BUSY].q_max); 1692 device_printf(sc->mly_dev, "complete %04d/%04d\n", 1693 sc->mly_qstat[MLYQ_COMPLETE].q_length, sc->mly_qstat[MLYQ_COMPLETE].q_max); 1694 } 1695 } 1696 1697 1698 /******************************************************************************** 1699 ******************************************************************************** 1700 Control device interface 1701 ******************************************************************************** 1702 ********************************************************************************/ 1703 1704 /******************************************************************************** 1705 * Accept an open operation on the control device. 1706 */ 1707 static int 1708 mly_user_open(dev_t dev, int flags, int fmt, d_thread_t *td) 1709 { 1710 int unit = minor(dev); 1711 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 1712 1713 sc->mly_state |= MLY_STATE_OPEN; 1714 return(0); 1715 } 1716 1717 /******************************************************************************** 1718 * Accept the last close on the control device. 1719 */ 1720 static int 1721 mly_user_close(dev_t dev, int flags, int fmt, d_thread_t *td) 1722 { 1723 int unit = minor(dev); 1724 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 1725 1726 sc->mly_state &= ~MLY_STATE_OPEN; 1727 return (0); 1728 } 1729 1730 /******************************************************************************** 1731 * Handle controller-specific control operations. 1732 */ 1733 static int 1734 mly_user_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, d_thread_t *td) 1735 { 1736 struct mly_softc *sc = (struct mly_softc *)dev->si_drv1; 1737 struct mly_user_command *uc = (struct mly_user_command *)addr; 1738 struct mly_user_health *uh = (struct mly_user_health *)addr; 1739 1740 switch(cmd) { 1741 case MLYIO_COMMAND: 1742 return(mly_user_command(sc, uc)); 1743 case MLYIO_HEALTH: 1744 return(mly_user_health(sc, uh)); 1745 default: 1746 return(ENOIOCTL); 1747 } 1748 } 1749 1750 /******************************************************************************** 1751 * Execute a command passed in from userspace. 1752 * 1753 * The control structure contains the actual command for the controller, as well 1754 * as the user-space data pointer and data size, and an optional sense buffer 1755 * size/pointer. On completion, the data size is adjusted to the command 1756 * residual, and the sense buffer size to the size of the returned sense data. 1757 * 1758 */ 1759 static int 1760 mly_user_command(struct mly_softc *sc, struct mly_user_command *uc) 1761 { 1762 struct mly_command *mc; 1763 int error, s; 1764 1765 /* allocate a command */ 1766 if (mly_alloc_command(sc, &mc)) { 1767 error = ENOMEM; 1768 goto out; /* XXX Linux version will wait for a command */ 1769 } 1770 1771 /* handle data size/direction */ 1772 mc->mc_length = (uc->DataTransferLength >= 0) ? uc->DataTransferLength : -uc->DataTransferLength; 1773 if (mc->mc_length > 0) 1774 mc->mc_data = malloc(mc->mc_length, M_DEVBUF, M_INTWAIT); 1775 if (uc->DataTransferLength > 0) { 1776 mc->mc_flags |= MLY_CMD_DATAIN; 1777 bzero(mc->mc_data, mc->mc_length); 1778 } 1779 if (uc->DataTransferLength < 0) { 1780 mc->mc_flags |= MLY_CMD_DATAOUT; 1781 if ((error = copyin(uc->DataTransferBuffer, mc->mc_data, mc->mc_length)) != 0) 1782 goto out; 1783 } 1784 1785 /* copy the controller command */ 1786 bcopy(&uc->CommandMailbox, mc->mc_packet, sizeof(uc->CommandMailbox)); 1787 1788 /* clear command completion handler so that we get woken up */ 1789 mc->mc_complete = NULL; 1790 1791 /* execute the command */ 1792 s = splcam(); 1793 mly_requeue_ready(mc); 1794 mly_startio(sc); 1795 while (!(mc->mc_flags & MLY_CMD_COMPLETE)) 1796 tsleep(mc, 0, "mlyioctl", 0); 1797 splx(s); 1798 1799 /* return the data to userspace */ 1800 if (uc->DataTransferLength > 0) 1801 if ((error = copyout(mc->mc_data, uc->DataTransferBuffer, mc->mc_length)) != 0) 1802 goto out; 1803 1804 /* return the sense buffer to userspace */ 1805 if ((uc->RequestSenseLength > 0) && (mc->mc_sense > 0)) { 1806 if ((error = copyout(mc->mc_packet, uc->RequestSenseBuffer, 1807 min(uc->RequestSenseLength, mc->mc_sense))) != 0) 1808 goto out; 1809 } 1810 1811 /* return command results to userspace (caller will copy out) */ 1812 uc->DataTransferLength = mc->mc_resid; 1813 uc->RequestSenseLength = min(uc->RequestSenseLength, mc->mc_sense); 1814 uc->CommandStatus = mc->mc_status; 1815 error = 0; 1816 1817 out: 1818 if (mc->mc_data != NULL) 1819 free(mc->mc_data, M_DEVBUF); 1820 if (mc != NULL) 1821 mly_release_command(mc); 1822 return(error); 1823 } 1824 1825 /******************************************************************************** 1826 * Return health status to userspace. If the health change index in the user 1827 * structure does not match that currently exported by the controller, we 1828 * return the current status immediately. Otherwise, we block until either 1829 * interrupted or new status is delivered. 1830 */ 1831 static int 1832 mly_user_health(struct mly_softc *sc, struct mly_user_health *uh) 1833 { 1834 struct mly_health_status mh; 1835 int error, s; 1836 1837 /* fetch the current health status from userspace */ 1838 if ((error = copyin(uh->HealthStatusBuffer, &mh, sizeof(mh))) != 0) 1839 return(error); 1840 1841 /* spin waiting for a status update */ 1842 s = splcam(); 1843 error = EWOULDBLOCK; 1844 while ((error != 0) && (sc->mly_event_change == mh.change_counter)) 1845 error = tsleep(&sc->mly_event_change, PCATCH, "mlyhealth", 0); 1846 splx(s); 1847 1848 /* copy the controller's health status buffer out (there is a race here if it changes again) */ 1849 error = copyout(&sc->mly_mmbox->mmm_health.status, uh->HealthStatusBuffer, 1850 sizeof(uh->HealthStatusBuffer)); 1851 return(error); 1852 } 1853