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 1.11 2004/09/15 14:24:33 joerg 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 callout_init(&sc->mly_periodic); 132 133 /* 134 * Initialise per-controller queues. 135 */ 136 mly_initq_free(sc); 137 mly_initq_ready(sc); 138 mly_initq_busy(sc); 139 mly_initq_complete(sc); 140 141 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005 142 /* 143 * Initialise command-completion task. 144 */ 145 TASK_INIT(&sc->mly_task_complete, 0, mly_complete, sc); 146 #endif 147 148 /* disable interrupts before we start talking to the controller */ 149 MLY_MASK_INTERRUPTS(sc); 150 151 /* 152 * Wait for the controller to come ready, handshake with the firmware if required. 153 * This is typically only necessary on platforms where the controller BIOS does not 154 * run. 155 */ 156 if ((error = mly_fwhandshake(sc))) 157 return(error); 158 159 /* 160 * Allocate command buffers 161 */ 162 if ((error = mly_alloc_commands(sc))) 163 return(error); 164 165 /* 166 * Obtain controller feature information 167 */ 168 if ((error = mly_get_controllerinfo(sc))) 169 return(error); 170 171 /* 172 * Get the current event counter for health purposes, populate the initial 173 * health status buffer. 174 */ 175 if ((error = mly_get_eventstatus(sc))) 176 return(error); 177 178 /* 179 * Enable memory-mailbox mode 180 */ 181 if ((error = mly_enable_mmbox(sc))) 182 return(error); 183 184 /* 185 * Attach to CAM. 186 */ 187 if ((error = mly_cam_attach(sc))) 188 return(error); 189 190 /* 191 * Print a little information about the controller 192 */ 193 mly_describe_controller(sc); 194 195 /* 196 * Mark all attached devices for rescan 197 */ 198 mly_scan_devices(sc); 199 200 /* 201 * Instigate the first status poll immediately. Rescan completions won't 202 * happen until interrupts are enabled, which should still be before 203 * the SCSI subsystem gets to us. (XXX assuming CAM and interrupt-driven 204 * discovery here...) 205 */ 206 mly_periodic((void *)sc); 207 208 /* 209 * Create the control device. 210 */ 211 cdevsw_add(&mly_cdevsw, -1, device_get_unit(sc->mly_dev)); 212 sc->mly_dev_t = make_dev(&mly_cdevsw, device_get_unit(sc->mly_dev), 213 UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR, 214 "mly%d", device_get_unit(sc->mly_dev)); 215 sc->mly_dev_t->si_drv1 = sc; 216 217 /* enable interrupts now */ 218 MLY_UNMASK_INTERRUPTS(sc); 219 220 return(0); 221 } 222 223 /******************************************************************************** 224 * Bring the controller to a state where it can be safely left alone. 225 */ 226 void 227 mly_detach(struct mly_softc *sc) 228 { 229 230 debug_called(1); 231 232 /* kill the periodic event */ 233 callout_stop(&sc->mly_periodic); 234 235 sc->mly_state |= MLY_STATE_SUSPEND; 236 237 /* flush controller */ 238 mly_printf(sc, "flushing cache..."); 239 printf("%s\n", mly_flush(sc) ? "failed" : "done"); 240 241 MLY_MASK_INTERRUPTS(sc); 242 } 243 244 /******************************************************************************** 245 ******************************************************************************** 246 Command Wrappers 247 ******************************************************************************** 248 ********************************************************************************/ 249 250 /******************************************************************************** 251 * Fill in the mly_controllerinfo and mly_controllerparam fields in the softc. 252 */ 253 static int 254 mly_get_controllerinfo(struct mly_softc *sc) 255 { 256 struct mly_command_ioctl mci; 257 u_int8_t status; 258 int error; 259 260 debug_called(1); 261 262 if (sc->mly_controllerinfo != NULL) 263 free(sc->mly_controllerinfo, M_DEVBUF); 264 265 /* build the getcontrollerinfo ioctl and send it */ 266 bzero(&mci, sizeof(mci)); 267 sc->mly_controllerinfo = NULL; 268 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERINFO; 269 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerinfo, sizeof(*sc->mly_controllerinfo), 270 &status, NULL, NULL))) 271 return(error); 272 if (status != 0) 273 return(EIO); 274 275 if (sc->mly_controllerparam != NULL) 276 free(sc->mly_controllerparam, M_DEVBUF); 277 278 /* build the getcontrollerparameter ioctl and send it */ 279 bzero(&mci, sizeof(mci)); 280 sc->mly_controllerparam = NULL; 281 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERPARAMETER; 282 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerparam, sizeof(*sc->mly_controllerparam), 283 &status, NULL, NULL))) 284 return(error); 285 if (status != 0) 286 return(EIO); 287 288 return(0); 289 } 290 291 /******************************************************************************** 292 * Schedule all possible devices for a rescan. 293 * 294 */ 295 static void 296 mly_scan_devices(struct mly_softc *sc) 297 { 298 int bus, target, nchn; 299 300 debug_called(1); 301 302 /* 303 * Clear any previous BTL information. 304 */ 305 bzero(&sc->mly_btl, sizeof(sc->mly_btl)); 306 307 /* 308 * Mark all devices as requiring a rescan, and let the early periodic scan collect them. 309 */ 310 nchn = sc->mly_controllerinfo->physical_channels_present + 311 sc->mly_controllerinfo->virtual_channels_present; 312 for (bus = 0; bus < nchn; bus++) 313 for (target = 0; target < MLY_MAX_TARGETS; target++) 314 sc->mly_btl[bus][target].mb_flags = MLY_BTL_RESCAN; 315 316 } 317 318 /******************************************************************************** 319 * Rescan a device, possibly as a consequence of getting an event which suggests 320 * that it may have changed. 321 */ 322 static void 323 mly_rescan_btl(struct mly_softc *sc, int bus, int target) 324 { 325 struct mly_command *mc; 326 struct mly_command_ioctl *mci; 327 328 debug_called(2); 329 330 /* get a command */ 331 mc = NULL; 332 if (mly_alloc_command(sc, &mc)) 333 return; /* we'll be retried soon */ 334 335 /* set up the data buffer */ 336 mc->mc_data = malloc(sizeof(union mly_devinfo), M_DEVBUF, M_INTWAIT | M_ZERO); 337 mc->mc_flags |= MLY_CMD_DATAIN; 338 mc->mc_complete = mly_complete_rescan; 339 340 sc->mly_btl[bus][target].mb_flags &= ~MLY_BTL_RESCAN; 341 342 /* 343 * Build the ioctl. 344 * 345 * At this point we are committed to sending this request, as it 346 * will be the only one constructed for this particular update. 347 */ 348 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl; 349 mci->opcode = MDACMD_IOCTL; 350 mci->addr.phys.controller = 0; 351 mci->timeout.value = 30; 352 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 353 if (bus >= sc->mly_controllerinfo->physical_channels_present) { 354 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getlogdevinfovalid); 355 mci->sub_ioctl = MDACIOCTL_GETLOGDEVINFOVALID; 356 mci->addr.log.logdev = ((bus - sc->mly_controllerinfo->physical_channels_present) * MLY_MAX_TARGETS) 357 + target; 358 debug(2, "logical device %d", mci->addr.log.logdev); 359 } else { 360 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getphysdevinfovalid); 361 mci->sub_ioctl = MDACIOCTL_GETPHYSDEVINFOVALID; 362 mci->addr.phys.lun = 0; 363 mci->addr.phys.target = target; 364 mci->addr.phys.channel = bus; 365 debug(2, "physical device %d:%d", mci->addr.phys.channel, mci->addr.phys.target); 366 } 367 368 /* 369 * Use the ready queue to get this command dispatched. 370 */ 371 mly_enqueue_ready(mc); 372 mly_startio(sc); 373 } 374 375 /******************************************************************************** 376 * Handle the completion of a rescan operation 377 */ 378 static void 379 mly_complete_rescan(struct mly_command *mc) 380 { 381 struct mly_softc *sc = mc->mc_sc; 382 struct mly_ioctl_getlogdevinfovalid *ldi; 383 struct mly_ioctl_getphysdevinfovalid *pdi; 384 int bus, target; 385 386 debug_called(2); 387 388 /* iff the command completed OK, we should use the result to update our data */ 389 if (mc->mc_status == 0) { 390 if (mc->mc_length == sizeof(*ldi)) { 391 ldi = (struct mly_ioctl_getlogdevinfovalid *)mc->mc_data; 392 bus = MLY_LOGDEV_BUS(sc, ldi->logical_device_number); 393 target = MLY_LOGDEV_TARGET(ldi->logical_device_number); 394 sc->mly_btl[bus][target].mb_flags = MLY_BTL_LOGICAL; /* clears all other flags */ 395 sc->mly_btl[bus][target].mb_type = ldi->raid_level; 396 sc->mly_btl[bus][target].mb_state = ldi->state; 397 debug(2, "BTL rescan for %d returns %s, %s", ldi->logical_device_number, 398 mly_describe_code(mly_table_device_type, ldi->raid_level), 399 mly_describe_code(mly_table_device_state, ldi->state)); 400 } else if (mc->mc_length == sizeof(*pdi)) { 401 pdi = (struct mly_ioctl_getphysdevinfovalid *)mc->mc_data; 402 bus = pdi->channel; 403 target = pdi->target; 404 sc->mly_btl[bus][target].mb_flags = MLY_BTL_PHYSICAL; /* clears all other flags */ 405 sc->mly_btl[bus][target].mb_type = MLY_DEVICE_TYPE_PHYSICAL; 406 sc->mly_btl[bus][target].mb_state = pdi->state; 407 sc->mly_btl[bus][target].mb_speed = pdi->speed; 408 sc->mly_btl[bus][target].mb_width = pdi->width; 409 if (pdi->state != MLY_DEVICE_STATE_UNCONFIGURED) 410 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_PROTECTED; 411 debug(2, "BTL rescan for %d:%d returns %s", bus, target, 412 mly_describe_code(mly_table_device_state, pdi->state)); 413 } else { 414 mly_printf(sc, "BTL rescan result corrupted\n"); 415 } 416 } else { 417 /* 418 * A request sent for a device beyond the last device present will fail. 419 * We don't care about this, so we do nothing about it. 420 */ 421 } 422 free(mc->mc_data, M_DEVBUF); 423 mly_release_command(mc); 424 } 425 426 /******************************************************************************** 427 * Get the current health status and set the 'next event' counter to suit. 428 */ 429 static int 430 mly_get_eventstatus(struct mly_softc *sc) 431 { 432 struct mly_command_ioctl mci; 433 struct mly_health_status *mh; 434 u_int8_t status; 435 int error; 436 437 /* build the gethealthstatus ioctl and send it */ 438 bzero(&mci, sizeof(mci)); 439 mh = NULL; 440 mci.sub_ioctl = MDACIOCTL_GETHEALTHSTATUS; 441 442 if ((error = mly_ioctl(sc, &mci, (void **)&mh, sizeof(*mh), &status, NULL, NULL))) 443 return(error); 444 if (status != 0) 445 return(EIO); 446 447 /* get the event counter */ 448 sc->mly_event_change = mh->change_counter; 449 sc->mly_event_waiting = mh->next_event; 450 sc->mly_event_counter = mh->next_event; 451 452 /* save the health status into the memory mailbox */ 453 bcopy(mh, &sc->mly_mmbox->mmm_health.status, sizeof(*mh)); 454 455 debug(1, "initial change counter %d, event counter %d", mh->change_counter, mh->next_event); 456 457 free(mh, M_DEVBUF); 458 return(0); 459 } 460 461 /******************************************************************************** 462 * Enable the memory mailbox mode. 463 */ 464 static int 465 mly_enable_mmbox(struct mly_softc *sc) 466 { 467 struct mly_command_ioctl mci; 468 u_int8_t *sp, status; 469 int error; 470 471 debug_called(1); 472 473 /* build the ioctl and send it */ 474 bzero(&mci, sizeof(mci)); 475 mci.sub_ioctl = MDACIOCTL_SETMEMORYMAILBOX; 476 /* set buffer addresses */ 477 mci.param.setmemorymailbox.command_mailbox_physaddr = 478 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_command); 479 mci.param.setmemorymailbox.status_mailbox_physaddr = 480 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_status); 481 mci.param.setmemorymailbox.health_buffer_physaddr = 482 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_health); 483 484 /* set buffer sizes - abuse of data_size field is revolting */ 485 sp = (u_int8_t *)&mci.data_size; 486 sp[0] = ((sizeof(union mly_command_packet) * MLY_MMBOX_COMMANDS) / 1024); 487 sp[1] = (sizeof(union mly_status_packet) * MLY_MMBOX_STATUS) / 1024; 488 mci.param.setmemorymailbox.health_buffer_size = sizeof(union mly_health_region) / 1024; 489 490 debug(1, "memory mailbox at %p (0x%llx/%d 0x%llx/%d 0x%llx/%d", sc->mly_mmbox, 491 mci.param.setmemorymailbox.command_mailbox_physaddr, sp[0], 492 mci.param.setmemorymailbox.status_mailbox_physaddr, sp[1], 493 mci.param.setmemorymailbox.health_buffer_physaddr, 494 mci.param.setmemorymailbox.health_buffer_size); 495 496 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL))) 497 return(error); 498 if (status != 0) 499 return(EIO); 500 sc->mly_state |= MLY_STATE_MMBOX_ACTIVE; 501 debug(1, "memory mailbox active"); 502 return(0); 503 } 504 505 /******************************************************************************** 506 * Flush all pending I/O from the controller. 507 */ 508 static int 509 mly_flush(struct mly_softc *sc) 510 { 511 struct mly_command_ioctl mci; 512 u_int8_t status; 513 int error; 514 515 debug_called(1); 516 517 /* build the ioctl */ 518 bzero(&mci, sizeof(mci)); 519 mci.sub_ioctl = MDACIOCTL_FLUSHDEVICEDATA; 520 mci.param.deviceoperation.operation_device = MLY_OPDEVICE_PHYSICAL_CONTROLLER; 521 522 /* pass it off to the controller */ 523 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL))) 524 return(error); 525 526 return((status == 0) ? 0 : EIO); 527 } 528 529 /******************************************************************************** 530 * Perform an ioctl command. 531 * 532 * If (data) is not NULL, the command requires data transfer. If (*data) is NULL 533 * the command requires data transfer from the controller, and we will allocate 534 * a buffer for it. If (*data) is not NULL, the command requires data transfer 535 * to the controller. 536 * 537 * XXX passing in the whole ioctl structure is ugly. Better ideas? 538 * 539 * XXX we don't even try to handle the case where datasize > 4k. We should. 540 */ 541 static int 542 mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, size_t datasize, 543 u_int8_t *status, void *sense_buffer, size_t *sense_length) 544 { 545 struct mly_command *mc; 546 struct mly_command_ioctl *mci; 547 int error; 548 549 debug_called(1); 550 551 mc = NULL; 552 if (mly_alloc_command(sc, &mc)) { 553 error = ENOMEM; 554 goto out; 555 } 556 557 /* copy the ioctl structure, but save some important fields and then fixup */ 558 mci = &mc->mc_packet->ioctl; 559 ioctl->sense_buffer_address = mci->sense_buffer_address; 560 ioctl->maximum_sense_size = mci->maximum_sense_size; 561 *mci = *ioctl; 562 mci->opcode = MDACMD_IOCTL; 563 mci->timeout.value = 30; 564 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 565 566 /* handle the data buffer */ 567 if (data != NULL) { 568 if (*data == NULL) { 569 /* allocate data buffer */ 570 mc->mc_data = malloc(datasize, M_DEVBUF, M_INTWAIT); 571 mc->mc_flags |= MLY_CMD_DATAIN; 572 } else { 573 mc->mc_data = *data; 574 mc->mc_flags |= MLY_CMD_DATAOUT; 575 } 576 mc->mc_length = datasize; 577 mc->mc_packet->generic.data_size = datasize; 578 } 579 580 /* run the command */ 581 if ((error = mly_immediate_command(mc))) 582 goto out; 583 584 /* clean up and return any data */ 585 *status = mc->mc_status; 586 if ((mc->mc_sense > 0) && (sense_buffer != NULL)) { 587 bcopy(mc->mc_packet, sense_buffer, mc->mc_sense); 588 *sense_length = mc->mc_sense; 589 goto out; 590 } 591 592 /* should we return a data pointer? */ 593 if ((data != NULL) && (*data == NULL)) 594 *data = mc->mc_data; 595 596 /* command completed OK */ 597 error = 0; 598 599 out: 600 if (mc != NULL) { 601 /* do we need to free a data buffer we allocated? */ 602 if (error && (mc->mc_data != NULL) && (*data == NULL)) 603 free(mc->mc_data, M_DEVBUF); 604 mly_release_command(mc); 605 } 606 return(error); 607 } 608 609 /******************************************************************************** 610 * Fetch one event from the controller. 611 */ 612 static void 613 mly_fetch_event(struct mly_softc *sc) 614 { 615 struct mly_command *mc; 616 struct mly_command_ioctl *mci; 617 int s; 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 s = splcam(); 638 if (sc->mly_event_counter == sc->mly_event_waiting) { 639 mly_release_command(mc); 640 splx(s); 641 return; 642 } 643 event = sc->mly_event_counter++; 644 splx(s); 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, s; 833 834 debug_called(2); 835 836 /* spinning at splcam is ugly, but we're only used during controller init */ 837 s = splcam(); 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 splx(s); 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 int s; 898 899 debug_called(2); 900 901 /* 902 * Set the command up for delivery to the controller. 903 */ 904 mly_map_command(mc); 905 mc->mc_packet->generic.command_id = mc->mc_slot; 906 907 s = splcam(); 908 909 /* 910 * Do we have to use the hardware mailbox? 911 */ 912 if (!(sc->mly_state & MLY_STATE_MMBOX_ACTIVE)) { 913 /* 914 * Check to see if the controller is ready for us. 915 */ 916 if (MLY_IDBR_TRUE(sc, MLY_HM_CMDSENT)) { 917 splx(s); 918 return(EBUSY); 919 } 920 mc->mc_flags |= MLY_CMD_BUSY; 921 922 /* 923 * It's ready, send the command. 924 */ 925 MLY_SET_MBOX(sc, sc->mly_command_mailbox, &mc->mc_packetphys); 926 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_CMDSENT); 927 928 } else { /* use memory-mailbox mode */ 929 930 pkt = &sc->mly_mmbox->mmm_command[sc->mly_mmbox_command_index]; 931 932 /* check to see if the next index is free yet */ 933 if (pkt->mmbox.flag != 0) { 934 splx(s); 935 return(EBUSY); 936 } 937 mc->mc_flags |= MLY_CMD_BUSY; 938 939 /* copy in new command */ 940 bcopy(mc->mc_packet->mmbox.data, pkt->mmbox.data, sizeof(pkt->mmbox.data)); 941 /* barrier to ensure completion of previous write before we write the flag */ 942 bus_space_barrier(NULL, NULL, 0, 0, BUS_SPACE_BARRIER_WRITE); /* tag/handle? */ 943 /* copy flag last */ 944 pkt->mmbox.flag = mc->mc_packet->mmbox.flag; 945 /* barrier to ensure completion of previous write before we notify the controller */ 946 bus_space_barrier(NULL, NULL, 0, 0, BUS_SPACE_BARRIER_WRITE); /* tag/handle */ 947 948 /* signal controller, update index */ 949 MLY_SET_REG(sc, sc->mly_idbr, MLY_AM_CMDSENT); 950 sc->mly_mmbox_command_index = (sc->mly_mmbox_command_index + 1) % MLY_MMBOX_COMMANDS; 951 } 952 953 mly_enqueue_busy(mc); 954 splx(s); 955 return(0); 956 } 957 958 /******************************************************************************** 959 * Pick up command status from the controller, schedule a completion event 960 */ 961 void 962 mly_done(struct mly_softc *sc) 963 { 964 struct mly_command *mc; 965 union mly_status_packet *sp; 966 u_int16_t slot; 967 int s, worked; 968 969 s = splcam(); 970 worked = 0; 971 972 /* pick up hardware-mailbox commands */ 973 if (MLY_ODBR_TRUE(sc, MLY_HM_STSREADY)) { 974 slot = MLY_GET_REG2(sc, sc->mly_status_mailbox); 975 if (slot < MLY_SLOT_MAX) { 976 mc = &sc->mly_command[slot - MLY_SLOT_START]; 977 mc->mc_status = MLY_GET_REG(sc, sc->mly_status_mailbox + 2); 978 mc->mc_sense = MLY_GET_REG(sc, sc->mly_status_mailbox + 3); 979 mc->mc_resid = MLY_GET_REG4(sc, sc->mly_status_mailbox + 4); 980 mly_remove_busy(mc); 981 mc->mc_flags &= ~MLY_CMD_BUSY; 982 mly_enqueue_complete(mc); 983 worked = 1; 984 } else { 985 /* slot 0xffff may mean "extremely bogus command" */ 986 mly_printf(sc, "got HM completion for illegal slot %u\n", slot); 987 } 988 /* unconditionally acknowledge status */ 989 MLY_SET_REG(sc, sc->mly_odbr, MLY_HM_STSREADY); 990 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 991 } 992 993 /* pick up memory-mailbox commands */ 994 if (MLY_ODBR_TRUE(sc, MLY_AM_STSREADY)) { 995 for (;;) { 996 sp = &sc->mly_mmbox->mmm_status[sc->mly_mmbox_status_index]; 997 998 /* check for more status */ 999 if (sp->mmbox.flag == 0) 1000 break; 1001 1002 /* get slot number */ 1003 slot = sp->status.command_id; 1004 if (slot < MLY_SLOT_MAX) { 1005 mc = &sc->mly_command[slot - MLY_SLOT_START]; 1006 mc->mc_status = sp->status.status; 1007 mc->mc_sense = sp->status.sense_length; 1008 mc->mc_resid = sp->status.residue; 1009 mly_remove_busy(mc); 1010 mc->mc_flags &= ~MLY_CMD_BUSY; 1011 mly_enqueue_complete(mc); 1012 worked = 1; 1013 } else { 1014 /* slot 0xffff may mean "extremely bogus command" */ 1015 mly_printf(sc, "got AM completion for illegal slot %u at %d\n", 1016 slot, sc->mly_mmbox_status_index); 1017 } 1018 1019 /* clear and move to next index */ 1020 sp->mmbox.flag = 0; 1021 sc->mly_mmbox_status_index = (sc->mly_mmbox_status_index + 1) % MLY_MMBOX_STATUS; 1022 } 1023 /* acknowledge that we have collected status value(s) */ 1024 MLY_SET_REG(sc, sc->mly_odbr, MLY_AM_STSREADY); 1025 } 1026 1027 splx(s); 1028 if (worked) { 1029 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005 1030 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) 1031 taskqueue_enqueue(taskqueue_swi, &sc->mly_task_complete); 1032 else 1033 #endif 1034 mly_complete(sc, 0); 1035 } 1036 } 1037 1038 /******************************************************************************** 1039 * Process completed commands 1040 */ 1041 static void 1042 mly_complete(void *context, int pending) 1043 { 1044 struct mly_softc *sc = (struct mly_softc *)context; 1045 struct mly_command *mc; 1046 void (* mc_complete)(struct mly_command *mc); 1047 1048 1049 debug_called(2); 1050 1051 /* 1052 * Spin pulling commands off the completed queue and processing them. 1053 */ 1054 while ((mc = mly_dequeue_complete(sc)) != NULL) { 1055 1056 /* 1057 * Free controller resources, mark command complete. 1058 * 1059 * Note that as soon as we mark the command complete, it may be freed 1060 * out from under us, so we need to save the mc_complete field in 1061 * order to later avoid dereferencing mc. (We would not expect to 1062 * have a polling/sleeping consumer with mc_complete != NULL). 1063 */ 1064 mly_unmap_command(mc); 1065 mc_complete = mc->mc_complete; 1066 mc->mc_flags |= MLY_CMD_COMPLETE; 1067 1068 /* 1069 * Call completion handler or wake up sleeping consumer. 1070 */ 1071 if (mc_complete != NULL) { 1072 mc_complete(mc); 1073 } else { 1074 wakeup(mc); 1075 } 1076 } 1077 1078 /* 1079 * We may have freed up controller resources which would allow us 1080 * to push more commands onto the controller, so we check here. 1081 */ 1082 mly_startio(sc); 1083 1084 /* 1085 * The controller may have updated the health status information, 1086 * so check for it here. 1087 * 1088 * Note that we only check for health status after a completed command. It 1089 * might be wise to ping the controller occasionally if it's been idle for 1090 * a while just to check up on it. While a filesystem is mounted, or I/O is 1091 * active this isn't really an issue. 1092 */ 1093 if (sc->mly_mmbox->mmm_health.status.change_counter != sc->mly_event_change) { 1094 sc->mly_event_change = sc->mly_mmbox->mmm_health.status.change_counter; 1095 debug(1, "event change %d, event status update, %d -> %d", sc->mly_event_change, 1096 sc->mly_event_waiting, sc->mly_mmbox->mmm_health.status.next_event); 1097 sc->mly_event_waiting = sc->mly_mmbox->mmm_health.status.next_event; 1098 1099 /* wake up anyone that might be interested in this */ 1100 wakeup(&sc->mly_event_change); 1101 } 1102 if (sc->mly_event_counter != sc->mly_event_waiting) 1103 mly_fetch_event(sc); 1104 } 1105 1106 /******************************************************************************** 1107 ******************************************************************************** 1108 Command Buffer Management 1109 ******************************************************************************** 1110 ********************************************************************************/ 1111 1112 /******************************************************************************** 1113 * Allocate a command. 1114 */ 1115 int 1116 mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp) 1117 { 1118 struct mly_command *mc; 1119 1120 debug_called(3); 1121 1122 if ((mc = mly_dequeue_free(sc)) == NULL) 1123 return(ENOMEM); 1124 1125 *mcp = mc; 1126 return(0); 1127 } 1128 1129 /******************************************************************************** 1130 * Release a command back to the freelist. 1131 */ 1132 void 1133 mly_release_command(struct mly_command *mc) 1134 { 1135 debug_called(3); 1136 1137 /* 1138 * Fill in parts of the command that may cause confusion if 1139 * a consumer doesn't when we are later allocated. 1140 */ 1141 mc->mc_data = NULL; 1142 mc->mc_flags = 0; 1143 mc->mc_complete = NULL; 1144 mc->mc_private = NULL; 1145 1146 /* 1147 * By default, we set up to overwrite the command packet with 1148 * sense information. 1149 */ 1150 mc->mc_packet->generic.sense_buffer_address = mc->mc_packetphys; 1151 mc->mc_packet->generic.maximum_sense_size = sizeof(union mly_command_packet); 1152 1153 mly_enqueue_free(mc); 1154 } 1155 1156 /******************************************************************************** 1157 * Map helper for command allocation. 1158 */ 1159 static void 1160 mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1161 { 1162 struct mly_softc *sc = (struct mly_softc *)arg 1163 1164 debug_called(2); 1165 1166 sc->mly_packetphys = segs[0].ds_addr; 1167 } 1168 1169 /******************************************************************************** 1170 * Allocate and initialise command and packet structures. 1171 */ 1172 static int 1173 mly_alloc_commands(struct mly_softc *sc) 1174 { 1175 struct mly_command *mc; 1176 int i; 1177 1178 /* 1179 * Allocate enough space for all the command packets in one chunk and 1180 * map them permanently into controller-visible space. 1181 */ 1182 if (bus_dmamem_alloc(sc->mly_packet_dmat, (void **)&sc->mly_packet, 1183 BUS_DMA_NOWAIT, &sc->mly_packetmap)) { 1184 return(ENOMEM); 1185 } 1186 bus_dmamap_load(sc->mly_packet_dmat, sc->mly_packetmap, sc->mly_packet, 1187 MLY_MAXCOMMANDS * sizeof(union mly_command_packet), 1188 mly_alloc_commands_map, sc, 0); 1189 1190 for (i = 0; i < MLY_MAXCOMMANDS; i++) { 1191 mc = &sc->mly_command[i]; 1192 bzero(mc, sizeof(*mc)); 1193 mc->mc_sc = sc; 1194 mc->mc_slot = MLY_SLOT_START + i; 1195 mc->mc_packet = sc->mly_packet + i; 1196 mc->mc_packetphys = sc->mly_packetphys + (i * sizeof(union mly_command_packet)); 1197 if (!bus_dmamap_create(sc->mly_buffer_dmat, 0, &mc->mc_datamap)) 1198 mly_release_command(mc); 1199 } 1200 return(0); 1201 } 1202 1203 /******************************************************************************** 1204 * Command-mapping helper function - populate this command's s/g table 1205 * with the s/g entries for its data. 1206 */ 1207 static void 1208 mly_map_command_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1209 { 1210 struct mly_command *mc = (struct mly_command *)arg; 1211 struct mly_softc *sc = mc->mc_sc; 1212 struct mly_command_generic *gen = &(mc->mc_packet->generic); 1213 struct mly_sg_entry *sg; 1214 int i, tabofs; 1215 1216 debug_called(3); 1217 1218 /* can we use the transfer structure directly? */ 1219 if (nseg <= 2) { 1220 sg = &gen->transfer.direct.sg[0]; 1221 gen->command_control.extended_sg_table = 0; 1222 } else { 1223 tabofs = ((mc->mc_slot - MLY_SLOT_START) * MLY_MAXSGENTRIES); 1224 sg = sc->mly_sg_table + tabofs; 1225 gen->transfer.indirect.entries[0] = nseg; 1226 gen->transfer.indirect.table_physaddr[0] = sc->mly_sg_busaddr + (tabofs * sizeof(struct mly_sg_entry)); 1227 gen->command_control.extended_sg_table = 1; 1228 } 1229 1230 /* copy the s/g table */ 1231 for (i = 0; i < nseg; i++) { 1232 sg[i].physaddr = segs[i].ds_addr; 1233 sg[i].length = segs[i].ds_len; 1234 } 1235 1236 } 1237 1238 #if 0 1239 /******************************************************************************** 1240 * Command-mapping helper function - save the cdb's physical address. 1241 * 1242 * We don't support 'large' SCSI commands at this time, so this is unused. 1243 */ 1244 static void 1245 mly_map_command_cdb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1246 { 1247 struct mly_command *mc = (struct mly_command *)arg; 1248 1249 debug_called(3); 1250 1251 /* XXX can we safely assume that a CDB will never cross a page boundary? */ 1252 if ((segs[0].ds_addr % PAGE_SIZE) > 1253 ((segs[0].ds_addr + mc->mc_packet->scsi_large.cdb_length) % PAGE_SIZE)) 1254 panic("cdb crosses page boundary"); 1255 1256 /* fix up fields in the command packet */ 1257 mc->mc_packet->scsi_large.cdb_physaddr = segs[0].ds_addr; 1258 } 1259 #endif 1260 1261 /******************************************************************************** 1262 * Map a command into controller-visible space 1263 */ 1264 static void 1265 mly_map_command(struct mly_command *mc) 1266 { 1267 struct mly_softc *sc = mc->mc_sc; 1268 1269 debug_called(2); 1270 1271 /* don't map more than once */ 1272 if (mc->mc_flags & MLY_CMD_MAPPED) 1273 return; 1274 1275 /* does the command have a data buffer? */ 1276 if (mc->mc_data != NULL) 1277 bus_dmamap_load(sc->mly_buffer_dmat, mc->mc_datamap, mc->mc_data, mc->mc_length, 1278 mly_map_command_sg, mc, 0); 1279 1280 if (mc->mc_flags & MLY_CMD_DATAIN) 1281 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREREAD); 1282 if (mc->mc_flags & MLY_CMD_DATAOUT) 1283 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREWRITE); 1284 1285 mc->mc_flags |= MLY_CMD_MAPPED; 1286 } 1287 1288 /******************************************************************************** 1289 * Unmap a command from controller-visible space 1290 */ 1291 static void 1292 mly_unmap_command(struct mly_command *mc) 1293 { 1294 struct mly_softc *sc = mc->mc_sc; 1295 1296 debug_called(2); 1297 1298 if (!(mc->mc_flags & MLY_CMD_MAPPED)) 1299 return; 1300 1301 if (mc->mc_flags & MLY_CMD_DATAIN) 1302 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTREAD); 1303 if (mc->mc_flags & MLY_CMD_DATAOUT) 1304 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTWRITE); 1305 1306 /* does the command have a data buffer? */ 1307 if (mc->mc_data != NULL) 1308 bus_dmamap_unload(sc->mly_buffer_dmat, mc->mc_datamap); 1309 1310 mc->mc_flags &= ~MLY_CMD_MAPPED; 1311 } 1312 1313 /******************************************************************************** 1314 ******************************************************************************** 1315 Hardware Control 1316 ******************************************************************************** 1317 ********************************************************************************/ 1318 1319 /******************************************************************************** 1320 * Handshake with the firmware while the card is being initialised. 1321 */ 1322 static int 1323 mly_fwhandshake(struct mly_softc *sc) 1324 { 1325 u_int8_t error, param0, param1; 1326 int spinup = 0; 1327 1328 debug_called(1); 1329 1330 /* set HM_STSACK and let the firmware initialise */ 1331 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 1332 DELAY(1000); /* too short? */ 1333 1334 /* if HM_STSACK is still true, the controller is initialising */ 1335 if (!MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) 1336 return(0); 1337 mly_printf(sc, "controller initialisation started\n"); 1338 1339 /* spin waiting for initialisation to finish, or for a message to be delivered */ 1340 while (MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) { 1341 /* check for a message */ 1342 if (MLY_ERROR_VALID(sc)) { 1343 error = MLY_GET_REG(sc, sc->mly_error_status) & ~MLY_MSG_EMPTY; 1344 param0 = MLY_GET_REG(sc, sc->mly_command_mailbox); 1345 param1 = MLY_GET_REG(sc, sc->mly_command_mailbox + 1); 1346 1347 switch(error) { 1348 case MLY_MSG_SPINUP: 1349 if (!spinup) { 1350 mly_printf(sc, "drive spinup in progress\n"); 1351 spinup = 1; /* only print this once (should print drive being spun?) */ 1352 } 1353 break; 1354 case MLY_MSG_RACE_RECOVERY_FAIL: 1355 mly_printf(sc, "mirror race recovery failed, one or more drives offline\n"); 1356 break; 1357 case MLY_MSG_RACE_IN_PROGRESS: 1358 mly_printf(sc, "mirror race recovery in progress\n"); 1359 break; 1360 case MLY_MSG_RACE_ON_CRITICAL: 1361 mly_printf(sc, "mirror race recovery on a critical drive\n"); 1362 break; 1363 case MLY_MSG_PARITY_ERROR: 1364 mly_printf(sc, "FATAL MEMORY PARITY ERROR\n"); 1365 return(ENXIO); 1366 default: 1367 mly_printf(sc, "unknown initialisation code 0x%x\n", error); 1368 } 1369 } 1370 } 1371 return(0); 1372 } 1373 1374 /******************************************************************************** 1375 ******************************************************************************** 1376 Debugging and Diagnostics 1377 ******************************************************************************** 1378 ********************************************************************************/ 1379 1380 /******************************************************************************** 1381 * Print some information about the controller. 1382 */ 1383 static void 1384 mly_describe_controller(struct mly_softc *sc) 1385 { 1386 struct mly_ioctl_getcontrollerinfo *mi = sc->mly_controllerinfo; 1387 1388 mly_printf(sc, "%16s, %d channel%s, firmware %d.%02d-%d-%02d (%02d%02d%02d%02d), %dMB RAM\n", 1389 mi->controller_name, mi->physical_channels_present, (mi->physical_channels_present) > 1 ? "s" : "", 1390 mi->fw_major, mi->fw_minor, mi->fw_turn, mi->fw_build, /* XXX turn encoding? */ 1391 mi->fw_century, mi->fw_year, mi->fw_month, mi->fw_day, 1392 mi->memory_size); 1393 1394 if (bootverbose) { 1395 mly_printf(sc, "%s %s (%x), %dMHz %d-bit %.16s\n", 1396 mly_describe_code(mly_table_oemname, mi->oem_information), 1397 mly_describe_code(mly_table_controllertype, mi->controller_type), mi->controller_type, 1398 mi->interface_speed, mi->interface_width, mi->interface_name); 1399 mly_printf(sc, "%dMB %dMHz %d-bit %s%s%s, cache %dMB\n", 1400 mi->memory_size, mi->memory_speed, mi->memory_width, 1401 mly_describe_code(mly_table_memorytype, mi->memory_type), 1402 mi->memory_parity ? "+parity": "",mi->memory_ecc ? "+ECC": "", 1403 mi->cache_size); 1404 mly_printf(sc, "CPU: %s @ %dMHZ\n", 1405 mly_describe_code(mly_table_cputype, mi->cpu[0].type), mi->cpu[0].speed); 1406 if (mi->l2cache_size != 0) 1407 mly_printf(sc, "%dKB L2 cache\n", mi->l2cache_size); 1408 if (mi->exmemory_size != 0) 1409 mly_printf(sc, "%dMB %dMHz %d-bit private %s%s%s\n", 1410 mi->exmemory_size, mi->exmemory_speed, mi->exmemory_width, 1411 mly_describe_code(mly_table_memorytype, mi->exmemory_type), 1412 mi->exmemory_parity ? "+parity": "",mi->exmemory_ecc ? "+ECC": ""); 1413 mly_printf(sc, "battery backup %s\n", mi->bbu_present ? "present" : "not installed"); 1414 mly_printf(sc, "maximum data transfer %d blocks, maximum sg entries/command %d\n", 1415 mi->maximum_block_count, mi->maximum_sg_entries); 1416 mly_printf(sc, "logical devices present/critical/offline %d/%d/%d\n", 1417 mi->logical_devices_present, mi->logical_devices_critical, mi->logical_devices_offline); 1418 mly_printf(sc, "physical devices present %d\n", 1419 mi->physical_devices_present); 1420 mly_printf(sc, "physical disks present/offline %d/%d\n", 1421 mi->physical_disks_present, mi->physical_disks_offline); 1422 mly_printf(sc, "%d physical channel%s, %d virtual channel%s of %d possible\n", 1423 mi->physical_channels_present, mi->physical_channels_present == 1 ? "" : "s", 1424 mi->virtual_channels_present, mi->virtual_channels_present == 1 ? "" : "s", 1425 mi->virtual_channels_possible); 1426 mly_printf(sc, "%d parallel commands supported\n", mi->maximum_parallel_commands); 1427 mly_printf(sc, "%dMB flash ROM, %d of %d maximum cycles\n", 1428 mi->flash_size, mi->flash_age, mi->flash_maximum_age); 1429 } 1430 } 1431 1432 #ifdef MLY_DEBUG 1433 /******************************************************************************** 1434 * Print some controller state 1435 */ 1436 static void 1437 mly_printstate(struct mly_softc *sc) 1438 { 1439 mly_printf(sc, "IDBR %02x ODBR %02x ERROR %02x (%x %x %x)\n", 1440 MLY_GET_REG(sc, sc->mly_idbr), 1441 MLY_GET_REG(sc, sc->mly_odbr), 1442 MLY_GET_REG(sc, sc->mly_error_status), 1443 sc->mly_idbr, 1444 sc->mly_odbr, 1445 sc->mly_error_status); 1446 mly_printf(sc, "IMASK %02x ISTATUS %02x\n", 1447 MLY_GET_REG(sc, sc->mly_interrupt_mask), 1448 MLY_GET_REG(sc, sc->mly_interrupt_status)); 1449 mly_printf(sc, "COMMAND %02x %02x %02x %02x %02x %02x %02x %02x\n", 1450 MLY_GET_REG(sc, sc->mly_command_mailbox), 1451 MLY_GET_REG(sc, sc->mly_command_mailbox + 1), 1452 MLY_GET_REG(sc, sc->mly_command_mailbox + 2), 1453 MLY_GET_REG(sc, sc->mly_command_mailbox + 3), 1454 MLY_GET_REG(sc, sc->mly_command_mailbox + 4), 1455 MLY_GET_REG(sc, sc->mly_command_mailbox + 5), 1456 MLY_GET_REG(sc, sc->mly_command_mailbox + 6), 1457 MLY_GET_REG(sc, sc->mly_command_mailbox + 7)); 1458 mly_printf(sc, "STATUS %02x %02x %02x %02x %02x %02x %02x %02x\n", 1459 MLY_GET_REG(sc, sc->mly_status_mailbox), 1460 MLY_GET_REG(sc, sc->mly_status_mailbox + 1), 1461 MLY_GET_REG(sc, sc->mly_status_mailbox + 2), 1462 MLY_GET_REG(sc, sc->mly_status_mailbox + 3), 1463 MLY_GET_REG(sc, sc->mly_status_mailbox + 4), 1464 MLY_GET_REG(sc, sc->mly_status_mailbox + 5), 1465 MLY_GET_REG(sc, sc->mly_status_mailbox + 6), 1466 MLY_GET_REG(sc, sc->mly_status_mailbox + 7)); 1467 mly_printf(sc, " %04x %08x\n", 1468 MLY_GET_REG2(sc, sc->mly_status_mailbox), 1469 MLY_GET_REG4(sc, sc->mly_status_mailbox + 4)); 1470 } 1471 1472 struct mly_softc *mly_softc0 = NULL; 1473 void 1474 mly_printstate0(void) 1475 { 1476 if (mly_softc0 != NULL) 1477 mly_printstate(mly_softc0); 1478 } 1479 1480 /******************************************************************************** 1481 * Print a command 1482 */ 1483 static void 1484 mly_print_command(struct mly_command *mc) 1485 { 1486 struct mly_softc *sc = mc->mc_sc; 1487 1488 mly_printf(sc, "COMMAND @ %p\n", mc); 1489 mly_printf(sc, " slot %d\n", mc->mc_slot); 1490 mly_printf(sc, " status 0x%x\n", mc->mc_status); 1491 mly_printf(sc, " sense len %d\n", mc->mc_sense); 1492 mly_printf(sc, " resid %d\n", mc->mc_resid); 1493 mly_printf(sc, " packet %p/0x%llx\n", mc->mc_packet, mc->mc_packetphys); 1494 if (mc->mc_packet != NULL) 1495 mly_print_packet(mc); 1496 mly_printf(sc, " data %p/%d\n", mc->mc_data, mc->mc_length); 1497 mly_printf(sc, " flags %b\n", mc->mc_flags, "\20\1busy\2complete\3slotted\4mapped\5datain\6dataout\n"); 1498 mly_printf(sc, " complete %p\n", mc->mc_complete); 1499 mly_printf(sc, " private %p\n", mc->mc_private); 1500 } 1501 1502 /******************************************************************************** 1503 * Print a command packet 1504 */ 1505 static void 1506 mly_print_packet(struct mly_command *mc) 1507 { 1508 struct mly_softc *sc = mc->mc_sc; 1509 struct mly_command_generic *ge = (struct mly_command_generic *)mc->mc_packet; 1510 struct mly_command_scsi_small *ss = (struct mly_command_scsi_small *)mc->mc_packet; 1511 struct mly_command_scsi_large *sl = (struct mly_command_scsi_large *)mc->mc_packet; 1512 struct mly_command_ioctl *io = (struct mly_command_ioctl *)mc->mc_packet; 1513 int transfer; 1514 1515 mly_printf(sc, " command_id %d\n", ge->command_id); 1516 mly_printf(sc, " opcode %d\n", ge->opcode); 1517 mly_printf(sc, " command_control fua %d dpo %d est %d dd %s nas %d ddis %d\n", 1518 ge->command_control.force_unit_access, 1519 ge->command_control.disable_page_out, 1520 ge->command_control.extended_sg_table, 1521 (ge->command_control.data_direction == MLY_CCB_WRITE) ? "WRITE" : "READ", 1522 ge->command_control.no_auto_sense, 1523 ge->command_control.disable_disconnect); 1524 mly_printf(sc, " data_size %d\n", ge->data_size); 1525 mly_printf(sc, " sense_buffer_address 0x%llx\n", ge->sense_buffer_address); 1526 mly_printf(sc, " lun %d\n", ge->addr.phys.lun); 1527 mly_printf(sc, " target %d\n", ge->addr.phys.target); 1528 mly_printf(sc, " channel %d\n", ge->addr.phys.channel); 1529 mly_printf(sc, " logical device %d\n", ge->addr.log.logdev); 1530 mly_printf(sc, " controller %d\n", ge->addr.phys.controller); 1531 mly_printf(sc, " timeout %d %s\n", 1532 ge->timeout.value, 1533 (ge->timeout.scale == MLY_TIMEOUT_SECONDS) ? "seconds" : 1534 ((ge->timeout.scale == MLY_TIMEOUT_MINUTES) ? "minutes" : "hours")); 1535 mly_printf(sc, " maximum_sense_size %d\n", ge->maximum_sense_size); 1536 switch(ge->opcode) { 1537 case MDACMD_SCSIPT: 1538 case MDACMD_SCSI: 1539 mly_printf(sc, " cdb length %d\n", ss->cdb_length); 1540 mly_printf(sc, " cdb %*D\n", ss->cdb_length, ss->cdb, " "); 1541 transfer = 1; 1542 break; 1543 case MDACMD_SCSILC: 1544 case MDACMD_SCSILCPT: 1545 mly_printf(sc, " cdb length %d\n", sl->cdb_length); 1546 mly_printf(sc, " cdb 0x%llx\n", sl->cdb_physaddr); 1547 transfer = 1; 1548 break; 1549 case MDACMD_IOCTL: 1550 mly_printf(sc, " sub_ioctl 0x%x\n", io->sub_ioctl); 1551 switch(io->sub_ioctl) { 1552 case MDACIOCTL_SETMEMORYMAILBOX: 1553 mly_printf(sc, " health_buffer_size %d\n", 1554 io->param.setmemorymailbox.health_buffer_size); 1555 mly_printf(sc, " health_buffer_phys 0x%llx\n", 1556 io->param.setmemorymailbox.health_buffer_physaddr); 1557 mly_printf(sc, " command_mailbox 0x%llx\n", 1558 io->param.setmemorymailbox.command_mailbox_physaddr); 1559 mly_printf(sc, " status_mailbox 0x%llx\n", 1560 io->param.setmemorymailbox.status_mailbox_physaddr); 1561 transfer = 0; 1562 break; 1563 1564 case MDACIOCTL_SETREALTIMECLOCK: 1565 case MDACIOCTL_GETHEALTHSTATUS: 1566 case MDACIOCTL_GETCONTROLLERINFO: 1567 case MDACIOCTL_GETLOGDEVINFOVALID: 1568 case MDACIOCTL_GETPHYSDEVINFOVALID: 1569 case MDACIOCTL_GETPHYSDEVSTATISTICS: 1570 case MDACIOCTL_GETLOGDEVSTATISTICS: 1571 case MDACIOCTL_GETCONTROLLERSTATISTICS: 1572 case MDACIOCTL_GETBDT_FOR_SYSDRIVE: 1573 case MDACIOCTL_CREATENEWCONF: 1574 case MDACIOCTL_ADDNEWCONF: 1575 case MDACIOCTL_GETDEVCONFINFO: 1576 case MDACIOCTL_GETFREESPACELIST: 1577 case MDACIOCTL_MORE: 1578 case MDACIOCTL_SETPHYSDEVPARAMETER: 1579 case MDACIOCTL_GETPHYSDEVPARAMETER: 1580 case MDACIOCTL_GETLOGDEVPARAMETER: 1581 case MDACIOCTL_SETLOGDEVPARAMETER: 1582 mly_printf(sc, " param %10D\n", io->param.data.param, " "); 1583 transfer = 1; 1584 break; 1585 1586 case MDACIOCTL_GETEVENT: 1587 mly_printf(sc, " event %d\n", 1588 io->param.getevent.sequence_number_low + ((u_int32_t)io->addr.log.logdev << 16)); 1589 transfer = 1; 1590 break; 1591 1592 case MDACIOCTL_SETRAIDDEVSTATE: 1593 mly_printf(sc, " state %d\n", io->param.setraiddevstate.state); 1594 transfer = 0; 1595 break; 1596 1597 case MDACIOCTL_XLATEPHYSDEVTORAIDDEV: 1598 mly_printf(sc, " raid_device %d\n", io->param.xlatephysdevtoraiddev.raid_device); 1599 mly_printf(sc, " controller %d\n", io->param.xlatephysdevtoraiddev.controller); 1600 mly_printf(sc, " channel %d\n", io->param.xlatephysdevtoraiddev.channel); 1601 mly_printf(sc, " target %d\n", io->param.xlatephysdevtoraiddev.target); 1602 mly_printf(sc, " lun %d\n", io->param.xlatephysdevtoraiddev.lun); 1603 transfer = 0; 1604 break; 1605 1606 case MDACIOCTL_GETGROUPCONFINFO: 1607 mly_printf(sc, " group %d\n", io->param.getgroupconfinfo.group); 1608 transfer = 1; 1609 break; 1610 1611 case MDACIOCTL_GET_SUBSYSTEM_DATA: 1612 case MDACIOCTL_SET_SUBSYSTEM_DATA: 1613 case MDACIOCTL_STARTDISOCVERY: 1614 case MDACIOCTL_INITPHYSDEVSTART: 1615 case MDACIOCTL_INITPHYSDEVSTOP: 1616 case MDACIOCTL_INITRAIDDEVSTART: 1617 case MDACIOCTL_INITRAIDDEVSTOP: 1618 case MDACIOCTL_REBUILDRAIDDEVSTART: 1619 case MDACIOCTL_REBUILDRAIDDEVSTOP: 1620 case MDACIOCTL_MAKECONSISTENTDATASTART: 1621 case MDACIOCTL_MAKECONSISTENTDATASTOP: 1622 case MDACIOCTL_CONSISTENCYCHECKSTART: 1623 case MDACIOCTL_CONSISTENCYCHECKSTOP: 1624 case MDACIOCTL_RESETDEVICE: 1625 case MDACIOCTL_FLUSHDEVICEDATA: 1626 case MDACIOCTL_PAUSEDEVICE: 1627 case MDACIOCTL_UNPAUSEDEVICE: 1628 case MDACIOCTL_LOCATEDEVICE: 1629 case MDACIOCTL_SETMASTERSLAVEMODE: 1630 case MDACIOCTL_DELETERAIDDEV: 1631 case MDACIOCTL_REPLACEINTERNALDEV: 1632 case MDACIOCTL_CLEARCONF: 1633 case MDACIOCTL_GETCONTROLLERPARAMETER: 1634 case MDACIOCTL_SETCONTRLLERPARAMETER: 1635 case MDACIOCTL_CLEARCONFSUSPMODE: 1636 case MDACIOCTL_STOREIMAGE: 1637 case MDACIOCTL_READIMAGE: 1638 case MDACIOCTL_FLASHIMAGES: 1639 case MDACIOCTL_RENAMERAIDDEV: 1640 default: /* no idea what to print */ 1641 transfer = 0; 1642 break; 1643 } 1644 break; 1645 1646 case MDACMD_IOCTLCHECK: 1647 case MDACMD_MEMCOPY: 1648 default: 1649 transfer = 0; 1650 break; /* print nothing */ 1651 } 1652 if (transfer) { 1653 if (ge->command_control.extended_sg_table) { 1654 mly_printf(sc, " sg table 0x%llx/%d\n", 1655 ge->transfer.indirect.table_physaddr[0], ge->transfer.indirect.entries[0]); 1656 } else { 1657 mly_printf(sc, " 0000 0x%llx/%lld\n", 1658 ge->transfer.direct.sg[0].physaddr, ge->transfer.direct.sg[0].length); 1659 mly_printf(sc, " 0001 0x%llx/%lld\n", 1660 ge->transfer.direct.sg[1].physaddr, ge->transfer.direct.sg[1].length); 1661 } 1662 } 1663 } 1664 1665 /******************************************************************************** 1666 * Panic in a slightly informative fashion 1667 */ 1668 static void 1669 mly_panic(struct mly_softc *sc, char *reason) 1670 { 1671 mly_printstate(sc); 1672 panic(reason); 1673 } 1674 #endif 1675 1676 /******************************************************************************** 1677 * Print queue statistics, callable from DDB. 1678 */ 1679 void 1680 mly_print_controller(int controller) 1681 { 1682 struct mly_softc *sc; 1683 1684 if ((sc = devclass_get_softc(devclass_find("mly"), controller)) == NULL) { 1685 printf("mly: controller %d invalid\n", controller); 1686 } else { 1687 device_printf(sc->mly_dev, "queue curr max\n"); 1688 device_printf(sc->mly_dev, "free %04d/%04d\n", 1689 sc->mly_qstat[MLYQ_FREE].q_length, sc->mly_qstat[MLYQ_FREE].q_max); 1690 device_printf(sc->mly_dev, "ready %04d/%04d\n", 1691 sc->mly_qstat[MLYQ_READY].q_length, sc->mly_qstat[MLYQ_READY].q_max); 1692 device_printf(sc->mly_dev, "busy %04d/%04d\n", 1693 sc->mly_qstat[MLYQ_BUSY].q_length, sc->mly_qstat[MLYQ_BUSY].q_max); 1694 device_printf(sc->mly_dev, "complete %04d/%04d\n", 1695 sc->mly_qstat[MLYQ_COMPLETE].q_length, sc->mly_qstat[MLYQ_COMPLETE].q_max); 1696 } 1697 } 1698 1699 1700 /******************************************************************************** 1701 ******************************************************************************** 1702 Control device interface 1703 ******************************************************************************** 1704 ********************************************************************************/ 1705 1706 /******************************************************************************** 1707 * Accept an open operation on the control device. 1708 */ 1709 static int 1710 mly_user_open(dev_t dev, int flags, int fmt, d_thread_t *td) 1711 { 1712 int unit = minor(dev); 1713 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 1714 1715 sc->mly_state |= MLY_STATE_OPEN; 1716 return(0); 1717 } 1718 1719 /******************************************************************************** 1720 * Accept the last close on the control device. 1721 */ 1722 static int 1723 mly_user_close(dev_t dev, int flags, int fmt, d_thread_t *td) 1724 { 1725 int unit = minor(dev); 1726 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 1727 1728 sc->mly_state &= ~MLY_STATE_OPEN; 1729 return (0); 1730 } 1731 1732 /******************************************************************************** 1733 * Handle controller-specific control operations. 1734 */ 1735 static int 1736 mly_user_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, d_thread_t *td) 1737 { 1738 struct mly_softc *sc = (struct mly_softc *)dev->si_drv1; 1739 struct mly_user_command *uc = (struct mly_user_command *)addr; 1740 struct mly_user_health *uh = (struct mly_user_health *)addr; 1741 1742 switch(cmd) { 1743 case MLYIO_COMMAND: 1744 return(mly_user_command(sc, uc)); 1745 case MLYIO_HEALTH: 1746 return(mly_user_health(sc, uh)); 1747 default: 1748 return(ENOIOCTL); 1749 } 1750 } 1751 1752 /******************************************************************************** 1753 * Execute a command passed in from userspace. 1754 * 1755 * The control structure contains the actual command for the controller, as well 1756 * as the user-space data pointer and data size, and an optional sense buffer 1757 * size/pointer. On completion, the data size is adjusted to the command 1758 * residual, and the sense buffer size to the size of the returned sense data. 1759 * 1760 */ 1761 static int 1762 mly_user_command(struct mly_softc *sc, struct mly_user_command *uc) 1763 { 1764 struct mly_command *mc; 1765 int error, s; 1766 1767 /* allocate a command */ 1768 if (mly_alloc_command(sc, &mc)) { 1769 error = ENOMEM; 1770 goto out; /* XXX Linux version will wait for a command */ 1771 } 1772 1773 /* handle data size/direction */ 1774 mc->mc_length = (uc->DataTransferLength >= 0) ? uc->DataTransferLength : -uc->DataTransferLength; 1775 if (mc->mc_length > 0) 1776 mc->mc_data = malloc(mc->mc_length, M_DEVBUF, M_INTWAIT); 1777 if (uc->DataTransferLength > 0) { 1778 mc->mc_flags |= MLY_CMD_DATAIN; 1779 bzero(mc->mc_data, mc->mc_length); 1780 } 1781 if (uc->DataTransferLength < 0) { 1782 mc->mc_flags |= MLY_CMD_DATAOUT; 1783 if ((error = copyin(uc->DataTransferBuffer, mc->mc_data, mc->mc_length)) != 0) 1784 goto out; 1785 } 1786 1787 /* copy the controller command */ 1788 bcopy(&uc->CommandMailbox, mc->mc_packet, sizeof(uc->CommandMailbox)); 1789 1790 /* clear command completion handler so that we get woken up */ 1791 mc->mc_complete = NULL; 1792 1793 /* execute the command */ 1794 s = splcam(); 1795 mly_requeue_ready(mc); 1796 mly_startio(sc); 1797 while (!(mc->mc_flags & MLY_CMD_COMPLETE)) 1798 tsleep(mc, 0, "mlyioctl", 0); 1799 splx(s); 1800 1801 /* return the data to userspace */ 1802 if (uc->DataTransferLength > 0) 1803 if ((error = copyout(mc->mc_data, uc->DataTransferBuffer, mc->mc_length)) != 0) 1804 goto out; 1805 1806 /* return the sense buffer to userspace */ 1807 if ((uc->RequestSenseLength > 0) && (mc->mc_sense > 0)) { 1808 if ((error = copyout(mc->mc_packet, uc->RequestSenseBuffer, 1809 min(uc->RequestSenseLength, mc->mc_sense))) != 0) 1810 goto out; 1811 } 1812 1813 /* return command results to userspace (caller will copy out) */ 1814 uc->DataTransferLength = mc->mc_resid; 1815 uc->RequestSenseLength = min(uc->RequestSenseLength, mc->mc_sense); 1816 uc->CommandStatus = mc->mc_status; 1817 error = 0; 1818 1819 out: 1820 if (mc->mc_data != NULL) 1821 free(mc->mc_data, M_DEVBUF); 1822 if (mc != NULL) 1823 mly_release_command(mc); 1824 return(error); 1825 } 1826 1827 /******************************************************************************** 1828 * Return health status to userspace. If the health change index in the user 1829 * structure does not match that currently exported by the controller, we 1830 * return the current status immediately. Otherwise, we block until either 1831 * interrupted or new status is delivered. 1832 */ 1833 static int 1834 mly_user_health(struct mly_softc *sc, struct mly_user_health *uh) 1835 { 1836 struct mly_health_status mh; 1837 int error, s; 1838 1839 /* fetch the current health status from userspace */ 1840 if ((error = copyin(uh->HealthStatusBuffer, &mh, sizeof(mh))) != 0) 1841 return(error); 1842 1843 /* spin waiting for a status update */ 1844 s = splcam(); 1845 error = EWOULDBLOCK; 1846 while ((error != 0) && (sc->mly_event_change == mh.change_counter)) 1847 error = tsleep(&sc->mly_event_change, PCATCH, "mlyhealth", 0); 1848 splx(s); 1849 1850 /* copy the controller's health status buffer out (there is a race here if it changes again) */ 1851 error = copyout(&sc->mly_mmbox->mmm_health.status, uh->HealthStatusBuffer, 1852 sizeof(uh->HealthStatusBuffer)); 1853 return(error); 1854 } 1855