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 1.13 2006/07/28 02:17:37 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/device.h> 38 #include <sys/ctype.h> 39 #include <sys/ioccom.h> 40 #include <sys/stat.h> 41 42 #include <machine/bus_memio.h> 43 #include <machine/bus.h> 44 #include <machine/resource.h> 45 #include <sys/rman.h> 46 #include <sys/thread2.h> 47 48 #include <bus/cam/scsi/scsi_all.h> 49 50 #include "mlyreg.h" 51 #include "mlyio.h" 52 #include "mlyvar.h" 53 #define MLY_DEFINE_TABLES 54 #include "mly_tables.h" 55 56 static int mly_get_controllerinfo(struct mly_softc *sc); 57 static void mly_scan_devices(struct mly_softc *sc); 58 static void mly_rescan_btl(struct mly_softc *sc, int bus, int target); 59 static void mly_complete_rescan(struct mly_command *mc); 60 static int mly_get_eventstatus(struct mly_softc *sc); 61 static int mly_enable_mmbox(struct mly_softc *sc); 62 static int mly_flush(struct mly_softc *sc); 63 static int mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, 64 size_t datasize, u_int8_t *status, void *sense_buffer, size_t *sense_length); 65 static void mly_fetch_event(struct mly_softc *sc); 66 static void mly_complete_event(struct mly_command *mc); 67 static void mly_process_event(struct mly_softc *sc, struct mly_event *me); 68 static void mly_periodic(void *data); 69 70 static int mly_immediate_command(struct mly_command *mc); 71 static int mly_start(struct mly_command *mc); 72 static void mly_complete(void *context, int pending); 73 74 static void mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error); 75 static int mly_alloc_commands(struct mly_softc *sc); 76 static void mly_map_command(struct mly_command *mc); 77 static void mly_unmap_command(struct mly_command *mc); 78 79 static int mly_fwhandshake(struct mly_softc *sc); 80 81 static void mly_describe_controller(struct mly_softc *sc); 82 #ifdef MLY_DEBUG 83 static void mly_printstate(struct mly_softc *sc); 84 static void mly_print_command(struct mly_command *mc); 85 static void mly_print_packet(struct mly_command *mc); 86 static void mly_panic(struct mly_softc *sc, char *reason); 87 #endif 88 void mly_print_controller(int controller); 89 90 static d_open_t mly_user_open; 91 static d_close_t mly_user_close; 92 static d_ioctl_t mly_user_ioctl; 93 static int mly_user_command(struct mly_softc *sc, struct mly_user_command *uc); 94 static int mly_user_health(struct mly_softc *sc, struct mly_user_health *uh); 95 96 #define MLY_CDEV_MAJOR 158 97 98 static struct dev_ops mly_ops = { 99 { "mly", MLY_CDEV_MAJOR, 0 }, 100 .d_open = mly_user_open, 101 .d_close = mly_user_close, 102 .d_ioctl = mly_user_ioctl, 103 }; 104 105 /******************************************************************************** 106 ******************************************************************************** 107 Device Interface 108 ******************************************************************************** 109 ********************************************************************************/ 110 111 /******************************************************************************** 112 * Initialise the controller and softc 113 */ 114 int 115 mly_attach(struct mly_softc *sc) 116 { 117 int error; 118 119 debug_called(1); 120 121 callout_init(&sc->mly_periodic); 122 123 /* 124 * Initialise per-controller queues. 125 */ 126 mly_initq_free(sc); 127 mly_initq_ready(sc); 128 mly_initq_busy(sc); 129 mly_initq_complete(sc); 130 131 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005 132 /* 133 * Initialise command-completion task. 134 */ 135 TASK_INIT(&sc->mly_task_complete, 0, mly_complete, sc); 136 #endif 137 138 /* disable interrupts before we start talking to the controller */ 139 MLY_MASK_INTERRUPTS(sc); 140 141 /* 142 * Wait for the controller to come ready, handshake with the firmware if required. 143 * This is typically only necessary on platforms where the controller BIOS does not 144 * run. 145 */ 146 if ((error = mly_fwhandshake(sc))) 147 return(error); 148 149 /* 150 * Allocate command buffers 151 */ 152 if ((error = mly_alloc_commands(sc))) 153 return(error); 154 155 /* 156 * Obtain controller feature information 157 */ 158 if ((error = mly_get_controllerinfo(sc))) 159 return(error); 160 161 /* 162 * Get the current event counter for health purposes, populate the initial 163 * health status buffer. 164 */ 165 if ((error = mly_get_eventstatus(sc))) 166 return(error); 167 168 /* 169 * Enable memory-mailbox mode 170 */ 171 if ((error = mly_enable_mmbox(sc))) 172 return(error); 173 174 /* 175 * Attach to CAM. 176 */ 177 if ((error = mly_cam_attach(sc))) 178 return(error); 179 180 /* 181 * Print a little information about the controller 182 */ 183 mly_describe_controller(sc); 184 185 /* 186 * Mark all attached devices for rescan 187 */ 188 mly_scan_devices(sc); 189 190 /* 191 * Instigate the first status poll immediately. Rescan completions won't 192 * happen until interrupts are enabled, which should still be before 193 * the SCSI subsystem gets to us. (XXX assuming CAM and interrupt-driven 194 * discovery here...) 195 */ 196 mly_periodic((void *)sc); 197 198 /* 199 * Create the control device. 200 */ 201 dev_ops_add(&mly_ops, -1, device_get_unit(sc->mly_dev)); 202 sc->mly_dev_t = make_dev(&mly_ops, device_get_unit(sc->mly_dev), 203 UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR, 204 "mly%d", device_get_unit(sc->mly_dev)); 205 sc->mly_dev_t->si_drv1 = sc; 206 207 /* enable interrupts now */ 208 MLY_UNMASK_INTERRUPTS(sc); 209 210 return(0); 211 } 212 213 /******************************************************************************** 214 * Bring the controller to a state where it can be safely left alone. 215 */ 216 void 217 mly_detach(struct mly_softc *sc) 218 { 219 220 debug_called(1); 221 222 /* kill the periodic event */ 223 callout_stop(&sc->mly_periodic); 224 225 sc->mly_state |= MLY_STATE_SUSPEND; 226 227 /* flush controller */ 228 mly_printf(sc, "flushing cache..."); 229 printf("%s\n", mly_flush(sc) ? "failed" : "done"); 230 231 MLY_MASK_INTERRUPTS(sc); 232 } 233 234 /******************************************************************************** 235 ******************************************************************************** 236 Command Wrappers 237 ******************************************************************************** 238 ********************************************************************************/ 239 240 /******************************************************************************** 241 * Fill in the mly_controllerinfo and mly_controllerparam fields in the softc. 242 */ 243 static int 244 mly_get_controllerinfo(struct mly_softc *sc) 245 { 246 struct mly_command_ioctl mci; 247 u_int8_t status; 248 int error; 249 250 debug_called(1); 251 252 if (sc->mly_controllerinfo != NULL) 253 free(sc->mly_controllerinfo, M_DEVBUF); 254 255 /* build the getcontrollerinfo ioctl and send it */ 256 bzero(&mci, sizeof(mci)); 257 sc->mly_controllerinfo = NULL; 258 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERINFO; 259 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerinfo, sizeof(*sc->mly_controllerinfo), 260 &status, NULL, NULL))) 261 return(error); 262 if (status != 0) 263 return(EIO); 264 265 if (sc->mly_controllerparam != NULL) 266 free(sc->mly_controllerparam, M_DEVBUF); 267 268 /* build the getcontrollerparameter ioctl and send it */ 269 bzero(&mci, sizeof(mci)); 270 sc->mly_controllerparam = NULL; 271 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERPARAMETER; 272 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerparam, sizeof(*sc->mly_controllerparam), 273 &status, NULL, NULL))) 274 return(error); 275 if (status != 0) 276 return(EIO); 277 278 return(0); 279 } 280 281 /******************************************************************************** 282 * Schedule all possible devices for a rescan. 283 * 284 */ 285 static void 286 mly_scan_devices(struct mly_softc *sc) 287 { 288 int bus, target, nchn; 289 290 debug_called(1); 291 292 /* 293 * Clear any previous BTL information. 294 */ 295 bzero(&sc->mly_btl, sizeof(sc->mly_btl)); 296 297 /* 298 * Mark all devices as requiring a rescan, and let the early periodic scan collect them. 299 */ 300 nchn = sc->mly_controllerinfo->physical_channels_present + 301 sc->mly_controllerinfo->virtual_channels_present; 302 for (bus = 0; bus < nchn; bus++) 303 for (target = 0; target < MLY_MAX_TARGETS; target++) 304 sc->mly_btl[bus][target].mb_flags = MLY_BTL_RESCAN; 305 306 } 307 308 /******************************************************************************** 309 * Rescan a device, possibly as a consequence of getting an event which suggests 310 * that it may have changed. 311 */ 312 static void 313 mly_rescan_btl(struct mly_softc *sc, int bus, int target) 314 { 315 struct mly_command *mc; 316 struct mly_command_ioctl *mci; 317 318 debug_called(2); 319 320 /* get a command */ 321 mc = NULL; 322 if (mly_alloc_command(sc, &mc)) 323 return; /* we'll be retried soon */ 324 325 /* set up the data buffer */ 326 mc->mc_data = malloc(sizeof(union mly_devinfo), M_DEVBUF, M_INTWAIT | M_ZERO); 327 mc->mc_flags |= MLY_CMD_DATAIN; 328 mc->mc_complete = mly_complete_rescan; 329 330 sc->mly_btl[bus][target].mb_flags &= ~MLY_BTL_RESCAN; 331 332 /* 333 * Build the ioctl. 334 * 335 * At this point we are committed to sending this request, as it 336 * will be the only one constructed for this particular update. 337 */ 338 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl; 339 mci->opcode = MDACMD_IOCTL; 340 mci->addr.phys.controller = 0; 341 mci->timeout.value = 30; 342 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 343 if (bus >= sc->mly_controllerinfo->physical_channels_present) { 344 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getlogdevinfovalid); 345 mci->sub_ioctl = MDACIOCTL_GETLOGDEVINFOVALID; 346 mci->addr.log.logdev = ((bus - sc->mly_controllerinfo->physical_channels_present) * MLY_MAX_TARGETS) 347 + target; 348 debug(2, "logical device %d", mci->addr.log.logdev); 349 } else { 350 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getphysdevinfovalid); 351 mci->sub_ioctl = MDACIOCTL_GETPHYSDEVINFOVALID; 352 mci->addr.phys.lun = 0; 353 mci->addr.phys.target = target; 354 mci->addr.phys.channel = bus; 355 debug(2, "physical device %d:%d", mci->addr.phys.channel, mci->addr.phys.target); 356 } 357 358 /* 359 * Use the ready queue to get this command dispatched. 360 */ 361 mly_enqueue_ready(mc); 362 mly_startio(sc); 363 } 364 365 /******************************************************************************** 366 * Handle the completion of a rescan operation 367 */ 368 static void 369 mly_complete_rescan(struct mly_command *mc) 370 { 371 struct mly_softc *sc = mc->mc_sc; 372 struct mly_ioctl_getlogdevinfovalid *ldi; 373 struct mly_ioctl_getphysdevinfovalid *pdi; 374 int bus, target; 375 376 debug_called(2); 377 378 /* iff the command completed OK, we should use the result to update our data */ 379 if (mc->mc_status == 0) { 380 if (mc->mc_length == sizeof(*ldi)) { 381 ldi = (struct mly_ioctl_getlogdevinfovalid *)mc->mc_data; 382 bus = MLY_LOGDEV_BUS(sc, ldi->logical_device_number); 383 target = MLY_LOGDEV_TARGET(ldi->logical_device_number); 384 sc->mly_btl[bus][target].mb_flags = MLY_BTL_LOGICAL; /* clears all other flags */ 385 sc->mly_btl[bus][target].mb_type = ldi->raid_level; 386 sc->mly_btl[bus][target].mb_state = ldi->state; 387 debug(2, "BTL rescan for %d returns %s, %s", ldi->logical_device_number, 388 mly_describe_code(mly_table_device_type, ldi->raid_level), 389 mly_describe_code(mly_table_device_state, ldi->state)); 390 } else if (mc->mc_length == sizeof(*pdi)) { 391 pdi = (struct mly_ioctl_getphysdevinfovalid *)mc->mc_data; 392 bus = pdi->channel; 393 target = pdi->target; 394 sc->mly_btl[bus][target].mb_flags = MLY_BTL_PHYSICAL; /* clears all other flags */ 395 sc->mly_btl[bus][target].mb_type = MLY_DEVICE_TYPE_PHYSICAL; 396 sc->mly_btl[bus][target].mb_state = pdi->state; 397 sc->mly_btl[bus][target].mb_speed = pdi->speed; 398 sc->mly_btl[bus][target].mb_width = pdi->width; 399 if (pdi->state != MLY_DEVICE_STATE_UNCONFIGURED) 400 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_PROTECTED; 401 debug(2, "BTL rescan for %d:%d returns %s", bus, target, 402 mly_describe_code(mly_table_device_state, pdi->state)); 403 } else { 404 mly_printf(sc, "BTL rescan result corrupted\n"); 405 } 406 } else { 407 /* 408 * A request sent for a device beyond the last device present will fail. 409 * We don't care about this, so we do nothing about it. 410 */ 411 } 412 free(mc->mc_data, M_DEVBUF); 413 mly_release_command(mc); 414 } 415 416 /******************************************************************************** 417 * Get the current health status and set the 'next event' counter to suit. 418 */ 419 static int 420 mly_get_eventstatus(struct mly_softc *sc) 421 { 422 struct mly_command_ioctl mci; 423 struct mly_health_status *mh; 424 u_int8_t status; 425 int error; 426 427 /* build the gethealthstatus ioctl and send it */ 428 bzero(&mci, sizeof(mci)); 429 mh = NULL; 430 mci.sub_ioctl = MDACIOCTL_GETHEALTHSTATUS; 431 432 if ((error = mly_ioctl(sc, &mci, (void **)&mh, sizeof(*mh), &status, NULL, NULL))) 433 return(error); 434 if (status != 0) 435 return(EIO); 436 437 /* get the event counter */ 438 sc->mly_event_change = mh->change_counter; 439 sc->mly_event_waiting = mh->next_event; 440 sc->mly_event_counter = mh->next_event; 441 442 /* save the health status into the memory mailbox */ 443 bcopy(mh, &sc->mly_mmbox->mmm_health.status, sizeof(*mh)); 444 445 debug(1, "initial change counter %d, event counter %d", mh->change_counter, mh->next_event); 446 447 free(mh, M_DEVBUF); 448 return(0); 449 } 450 451 /******************************************************************************** 452 * Enable the memory mailbox mode. 453 */ 454 static int 455 mly_enable_mmbox(struct mly_softc *sc) 456 { 457 struct mly_command_ioctl mci; 458 u_int8_t *sp, status; 459 int error; 460 461 debug_called(1); 462 463 /* build the ioctl and send it */ 464 bzero(&mci, sizeof(mci)); 465 mci.sub_ioctl = MDACIOCTL_SETMEMORYMAILBOX; 466 /* set buffer addresses */ 467 mci.param.setmemorymailbox.command_mailbox_physaddr = 468 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_command); 469 mci.param.setmemorymailbox.status_mailbox_physaddr = 470 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_status); 471 mci.param.setmemorymailbox.health_buffer_physaddr = 472 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_health); 473 474 /* set buffer sizes - abuse of data_size field is revolting */ 475 sp = (u_int8_t *)&mci.data_size; 476 sp[0] = ((sizeof(union mly_command_packet) * MLY_MMBOX_COMMANDS) / 1024); 477 sp[1] = (sizeof(union mly_status_packet) * MLY_MMBOX_STATUS) / 1024; 478 mci.param.setmemorymailbox.health_buffer_size = sizeof(union mly_health_region) / 1024; 479 480 debug(1, "memory mailbox at %p (0x%llx/%d 0x%llx/%d 0x%llx/%d", sc->mly_mmbox, 481 mci.param.setmemorymailbox.command_mailbox_physaddr, sp[0], 482 mci.param.setmemorymailbox.status_mailbox_physaddr, sp[1], 483 mci.param.setmemorymailbox.health_buffer_physaddr, 484 mci.param.setmemorymailbox.health_buffer_size); 485 486 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL))) 487 return(error); 488 if (status != 0) 489 return(EIO); 490 sc->mly_state |= MLY_STATE_MMBOX_ACTIVE; 491 debug(1, "memory mailbox active"); 492 return(0); 493 } 494 495 /******************************************************************************** 496 * Flush all pending I/O from the controller. 497 */ 498 static int 499 mly_flush(struct mly_softc *sc) 500 { 501 struct mly_command_ioctl mci; 502 u_int8_t status; 503 int error; 504 505 debug_called(1); 506 507 /* build the ioctl */ 508 bzero(&mci, sizeof(mci)); 509 mci.sub_ioctl = MDACIOCTL_FLUSHDEVICEDATA; 510 mci.param.deviceoperation.operation_device = MLY_OPDEVICE_PHYSICAL_CONTROLLER; 511 512 /* pass it off to the controller */ 513 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL))) 514 return(error); 515 516 return((status == 0) ? 0 : EIO); 517 } 518 519 /******************************************************************************** 520 * Perform an ioctl command. 521 * 522 * If (data) is not NULL, the command requires data transfer. If (*data) is NULL 523 * the command requires data transfer from the controller, and we will allocate 524 * a buffer for it. If (*data) is not NULL, the command requires data transfer 525 * to the controller. 526 * 527 * XXX passing in the whole ioctl structure is ugly. Better ideas? 528 * 529 * XXX we don't even try to handle the case where datasize > 4k. We should. 530 */ 531 static int 532 mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, size_t datasize, 533 u_int8_t *status, void *sense_buffer, size_t *sense_length) 534 { 535 struct mly_command *mc; 536 struct mly_command_ioctl *mci; 537 int error; 538 539 debug_called(1); 540 541 mc = NULL; 542 if (mly_alloc_command(sc, &mc)) { 543 error = ENOMEM; 544 goto out; 545 } 546 547 /* copy the ioctl structure, but save some important fields and then fixup */ 548 mci = &mc->mc_packet->ioctl; 549 ioctl->sense_buffer_address = mci->sense_buffer_address; 550 ioctl->maximum_sense_size = mci->maximum_sense_size; 551 *mci = *ioctl; 552 mci->opcode = MDACMD_IOCTL; 553 mci->timeout.value = 30; 554 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 555 556 /* handle the data buffer */ 557 if (data != NULL) { 558 if (*data == NULL) { 559 /* allocate data buffer */ 560 mc->mc_data = malloc(datasize, M_DEVBUF, M_INTWAIT); 561 mc->mc_flags |= MLY_CMD_DATAIN; 562 } else { 563 mc->mc_data = *data; 564 mc->mc_flags |= MLY_CMD_DATAOUT; 565 } 566 mc->mc_length = datasize; 567 mc->mc_packet->generic.data_size = datasize; 568 } 569 570 /* run the command */ 571 if ((error = mly_immediate_command(mc))) 572 goto out; 573 574 /* clean up and return any data */ 575 *status = mc->mc_status; 576 if ((mc->mc_sense > 0) && (sense_buffer != NULL)) { 577 bcopy(mc->mc_packet, sense_buffer, mc->mc_sense); 578 *sense_length = mc->mc_sense; 579 goto out; 580 } 581 582 /* should we return a data pointer? */ 583 if ((data != NULL) && (*data == NULL)) 584 *data = mc->mc_data; 585 586 /* command completed OK */ 587 error = 0; 588 589 out: 590 if (mc != NULL) { 591 /* do we need to free a data buffer we allocated? */ 592 if (error && (mc->mc_data != NULL) && (*data == NULL)) 593 free(mc->mc_data, M_DEVBUF); 594 mly_release_command(mc); 595 } 596 return(error); 597 } 598 599 /******************************************************************************** 600 * Fetch one event from the controller. 601 */ 602 static void 603 mly_fetch_event(struct mly_softc *sc) 604 { 605 struct mly_command *mc; 606 struct mly_command_ioctl *mci; 607 u_int32_t event; 608 609 debug_called(2); 610 611 /* get a command */ 612 mc = NULL; 613 if (mly_alloc_command(sc, &mc)) 614 return; /* we'll get retried the next time a command completes */ 615 616 /* set up the data buffer */ 617 mc->mc_data = malloc(sizeof(struct mly_event), M_DEVBUF, M_INTWAIT|M_ZERO); 618 mc->mc_length = sizeof(struct mly_event); 619 mc->mc_flags |= MLY_CMD_DATAIN; 620 mc->mc_complete = mly_complete_event; 621 622 /* 623 * Get an event number to fetch. It's possible that we've raced with another 624 * context for the last event, in which case there will be no more events. 625 */ 626 crit_enter(); 627 if (sc->mly_event_counter == sc->mly_event_waiting) { 628 mly_release_command(mc); 629 crit_exit(); 630 return; 631 } 632 event = sc->mly_event_counter++; 633 crit_exit(); 634 635 /* 636 * Build the ioctl. 637 * 638 * At this point we are committed to sending this request, as it 639 * will be the only one constructed for this particular event number. 640 */ 641 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl; 642 mci->opcode = MDACMD_IOCTL; 643 mci->data_size = sizeof(struct mly_event); 644 mci->addr.phys.lun = (event >> 16) & 0xff; 645 mci->addr.phys.target = (event >> 24) & 0xff; 646 mci->addr.phys.channel = 0; 647 mci->addr.phys.controller = 0; 648 mci->timeout.value = 30; 649 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 650 mci->sub_ioctl = MDACIOCTL_GETEVENT; 651 mci->param.getevent.sequence_number_low = event & 0xffff; 652 653 debug(2, "fetch event %u", event); 654 655 /* 656 * Use the ready queue to get this command dispatched. 657 */ 658 mly_enqueue_ready(mc); 659 mly_startio(sc); 660 } 661 662 /******************************************************************************** 663 * Handle the completion of an event poll. 664 * 665 * Note that we don't actually have to instigate another poll; the completion of 666 * this command will trigger that if there are any more events to poll for. 667 */ 668 static void 669 mly_complete_event(struct mly_command *mc) 670 { 671 struct mly_softc *sc = mc->mc_sc; 672 struct mly_event *me = (struct mly_event *)mc->mc_data; 673 674 debug_called(2); 675 676 /* 677 * If the event was successfully fetched, process it. 678 */ 679 if (mc->mc_status == SCSI_STATUS_OK) { 680 mly_process_event(sc, me); 681 free(me, M_DEVBUF); 682 } 683 mly_release_command(mc); 684 } 685 686 /******************************************************************************** 687 * Process a controller event. 688 */ 689 static void 690 mly_process_event(struct mly_softc *sc, struct mly_event *me) 691 { 692 struct scsi_sense_data *ssd = (struct scsi_sense_data *)&me->sense[0]; 693 char *fp, *tp; 694 int bus, target, event, class, action; 695 696 /* 697 * Errors can be reported using vendor-unique sense data. In this case, the 698 * event code will be 0x1c (Request sense data present), the sense key will 699 * be 0x09 (vendor specific), the MSB of the ASC will be set, and the 700 * actual event code will be a 16-bit value comprised of the ASCQ (low byte) 701 * and low seven bits of the ASC (low seven bits of the high byte). 702 */ 703 if ((me->code == 0x1c) && 704 ((ssd->flags & SSD_KEY) == SSD_KEY_Vendor_Specific) && 705 (ssd->add_sense_code & 0x80)) { 706 event = ((int)(ssd->add_sense_code & ~0x80) << 8) + ssd->add_sense_code_qual; 707 } else { 708 event = me->code; 709 } 710 711 /* look up event, get codes */ 712 fp = mly_describe_code(mly_table_event, event); 713 714 debug(2, "Event %d code 0x%x", me->sequence_number, me->code); 715 716 /* quiet event? */ 717 class = fp[0]; 718 if (isupper(class) && bootverbose) 719 class = tolower(class); 720 721 /* get action code, text string */ 722 action = fp[1]; 723 tp = &fp[2]; 724 725 /* 726 * Print some information about the event. 727 * 728 * This code uses a table derived from the corresponding portion of the Linux 729 * driver, and thus the parser is very similar. 730 */ 731 switch(class) { 732 case 'p': /* error on physical device */ 733 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp); 734 if (action == 'r') 735 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN; 736 break; 737 case 'l': /* error on logical unit */ 738 case 'm': /* message about logical unit */ 739 bus = MLY_LOGDEV_BUS(sc, me->lun); 740 target = MLY_LOGDEV_TARGET(me->lun); 741 mly_name_device(sc, bus, target); 742 mly_printf(sc, "logical device %d (%s) %s\n", me->lun, sc->mly_btl[bus][target].mb_name, tp); 743 if (action == 'r') 744 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_RESCAN; 745 break; 746 break; 747 case 's': /* report of sense data */ 748 if (((ssd->flags & SSD_KEY) == SSD_KEY_NO_SENSE) || 749 (((ssd->flags & SSD_KEY) == SSD_KEY_NOT_READY) && 750 (ssd->add_sense_code == 0x04) && 751 ((ssd->add_sense_code_qual == 0x01) || (ssd->add_sense_code_qual == 0x02)))) 752 break; /* ignore NO_SENSE or NOT_READY in one case */ 753 754 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp); 755 mly_printf(sc, " sense key %d asc %02x ascq %02x\n", 756 ssd->flags & SSD_KEY, ssd->add_sense_code, ssd->add_sense_code_qual); 757 mly_printf(sc, " info %4D csi %4D\n", ssd->info, "", ssd->cmd_spec_info, ""); 758 if (action == 'r') 759 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN; 760 break; 761 case 'e': 762 mly_printf(sc, tp, me->target, me->lun); 763 break; 764 case 'c': 765 mly_printf(sc, "controller %s\n", tp); 766 break; 767 case '?': 768 mly_printf(sc, "%s - %d\n", tp, me->code); 769 break; 770 default: /* probably a 'noisy' event being ignored */ 771 break; 772 } 773 } 774 775 /******************************************************************************** 776 * Perform periodic activities. 777 */ 778 static void 779 mly_periodic(void *data) 780 { 781 struct mly_softc *sc = (struct mly_softc *)data; 782 int nchn, bus, target; 783 784 debug_called(2); 785 786 /* 787 * Scan devices. 788 */ 789 nchn = sc->mly_controllerinfo->physical_channels_present + 790 sc->mly_controllerinfo->virtual_channels_present; 791 for (bus = 0; bus < nchn; bus++) { 792 for (target = 0; target < MLY_MAX_TARGETS; target++) { 793 794 /* ignore the controller in this scan */ 795 if (target == sc->mly_controllerparam->initiator_id) 796 continue; 797 798 /* perform device rescan? */ 799 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_RESCAN) 800 mly_rescan_btl(sc, bus, target); 801 } 802 } 803 804 callout_reset(&sc->mly_periodic, hz, mly_periodic, sc); 805 } 806 807 /******************************************************************************** 808 ******************************************************************************** 809 Command Processing 810 ******************************************************************************** 811 ********************************************************************************/ 812 813 /******************************************************************************** 814 * Run a command and wait for it to complete. 815 * 816 */ 817 static int 818 mly_immediate_command(struct mly_command *mc) 819 { 820 struct mly_softc *sc = mc->mc_sc; 821 int error; 822 823 debug_called(2); 824 825 /* spinning at splcam is ugly, but we're only used during controller init */ 826 crit_enter(); 827 if ((error = mly_start(mc))) 828 return(error); 829 830 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) { 831 /* sleep on the command */ 832 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) { 833 tsleep(mc, 0, "mlywait", 0); 834 } 835 } else { 836 /* spin and collect status while we do */ 837 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) { 838 mly_done(mc->mc_sc); 839 } 840 } 841 crit_exit(); 842 return(0); 843 } 844 845 /******************************************************************************** 846 * Start as much queued I/O as possible on the controller 847 */ 848 void 849 mly_startio(struct mly_softc *sc) 850 { 851 struct mly_command *mc; 852 853 debug_called(2); 854 855 for (;;) { 856 857 /* try for a ready command */ 858 mc = mly_dequeue_ready(sc); 859 860 /* try to build a command from a queued ccb */ 861 if (!mc) 862 mly_cam_command(sc, &mc); 863 864 /* no command == nothing to do */ 865 if (!mc) 866 break; 867 868 /* try to post the command */ 869 if (mly_start(mc)) { 870 /* controller busy, or no resources - defer for later */ 871 mly_requeue_ready(mc); 872 break; 873 } 874 } 875 } 876 877 /******************************************************************************** 878 * Deliver a command to the controller; allocate controller resources at the 879 * last moment. 880 */ 881 static int 882 mly_start(struct mly_command *mc) 883 { 884 struct mly_softc *sc = mc->mc_sc; 885 union mly_command_packet *pkt; 886 887 debug_called(2); 888 889 /* 890 * Set the command up for delivery to the controller. 891 */ 892 mly_map_command(mc); 893 mc->mc_packet->generic.command_id = mc->mc_slot; 894 895 crit_enter(); 896 897 /* 898 * Do we have to use the hardware mailbox? 899 */ 900 if (!(sc->mly_state & MLY_STATE_MMBOX_ACTIVE)) { 901 /* 902 * Check to see if the controller is ready for us. 903 */ 904 if (MLY_IDBR_TRUE(sc, MLY_HM_CMDSENT)) { 905 crit_exit(); 906 return(EBUSY); 907 } 908 mc->mc_flags |= MLY_CMD_BUSY; 909 910 /* 911 * It's ready, send the command. 912 */ 913 MLY_SET_MBOX(sc, sc->mly_command_mailbox, &mc->mc_packetphys); 914 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_CMDSENT); 915 916 } else { /* use memory-mailbox mode */ 917 918 pkt = &sc->mly_mmbox->mmm_command[sc->mly_mmbox_command_index]; 919 920 /* check to see if the next index is free yet */ 921 if (pkt->mmbox.flag != 0) { 922 crit_exit(); 923 return(EBUSY); 924 } 925 mc->mc_flags |= MLY_CMD_BUSY; 926 927 /* copy in new command */ 928 bcopy(mc->mc_packet->mmbox.data, pkt->mmbox.data, sizeof(pkt->mmbox.data)); 929 /* barrier to ensure completion of previous write before we write the flag */ 930 bus_space_barrier(NULL, NULL, 0, 0, BUS_SPACE_BARRIER_WRITE); /* tag/handle? */ 931 /* copy flag last */ 932 pkt->mmbox.flag = mc->mc_packet->mmbox.flag; 933 /* barrier to ensure completion of previous write before we notify the controller */ 934 bus_space_barrier(NULL, NULL, 0, 0, BUS_SPACE_BARRIER_WRITE); /* tag/handle */ 935 936 /* signal controller, update index */ 937 MLY_SET_REG(sc, sc->mly_idbr, MLY_AM_CMDSENT); 938 sc->mly_mmbox_command_index = (sc->mly_mmbox_command_index + 1) % MLY_MMBOX_COMMANDS; 939 } 940 941 mly_enqueue_busy(mc); 942 crit_exit(); 943 return(0); 944 } 945 946 /******************************************************************************** 947 * Pick up command status from the controller, schedule a completion event 948 */ 949 void 950 mly_done(struct mly_softc *sc) 951 { 952 struct mly_command *mc; 953 union mly_status_packet *sp; 954 u_int16_t slot; 955 int worked; 956 957 crit_enter(); 958 worked = 0; 959 960 /* pick up hardware-mailbox commands */ 961 if (MLY_ODBR_TRUE(sc, MLY_HM_STSREADY)) { 962 slot = MLY_GET_REG2(sc, sc->mly_status_mailbox); 963 if (slot < MLY_SLOT_MAX) { 964 mc = &sc->mly_command[slot - MLY_SLOT_START]; 965 mc->mc_status = MLY_GET_REG(sc, sc->mly_status_mailbox + 2); 966 mc->mc_sense = MLY_GET_REG(sc, sc->mly_status_mailbox + 3); 967 mc->mc_resid = MLY_GET_REG4(sc, sc->mly_status_mailbox + 4); 968 mly_remove_busy(mc); 969 mc->mc_flags &= ~MLY_CMD_BUSY; 970 mly_enqueue_complete(mc); 971 worked = 1; 972 } else { 973 /* slot 0xffff may mean "extremely bogus command" */ 974 mly_printf(sc, "got HM completion for illegal slot %u\n", slot); 975 } 976 /* unconditionally acknowledge status */ 977 MLY_SET_REG(sc, sc->mly_odbr, MLY_HM_STSREADY); 978 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 979 } 980 981 /* pick up memory-mailbox commands */ 982 if (MLY_ODBR_TRUE(sc, MLY_AM_STSREADY)) { 983 for (;;) { 984 sp = &sc->mly_mmbox->mmm_status[sc->mly_mmbox_status_index]; 985 986 /* check for more status */ 987 if (sp->mmbox.flag == 0) 988 break; 989 990 /* get slot number */ 991 slot = sp->status.command_id; 992 if (slot < MLY_SLOT_MAX) { 993 mc = &sc->mly_command[slot - MLY_SLOT_START]; 994 mc->mc_status = sp->status.status; 995 mc->mc_sense = sp->status.sense_length; 996 mc->mc_resid = sp->status.residue; 997 mly_remove_busy(mc); 998 mc->mc_flags &= ~MLY_CMD_BUSY; 999 mly_enqueue_complete(mc); 1000 worked = 1; 1001 } else { 1002 /* slot 0xffff may mean "extremely bogus command" */ 1003 mly_printf(sc, "got AM completion for illegal slot %u at %d\n", 1004 slot, sc->mly_mmbox_status_index); 1005 } 1006 1007 /* clear and move to next index */ 1008 sp->mmbox.flag = 0; 1009 sc->mly_mmbox_status_index = (sc->mly_mmbox_status_index + 1) % MLY_MMBOX_STATUS; 1010 } 1011 /* acknowledge that we have collected status value(s) */ 1012 MLY_SET_REG(sc, sc->mly_odbr, MLY_AM_STSREADY); 1013 } 1014 1015 crit_exit(); 1016 if (worked) { 1017 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005 1018 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) 1019 taskqueue_enqueue(taskqueue_swi, &sc->mly_task_complete); 1020 else 1021 #endif 1022 mly_complete(sc, 0); 1023 } 1024 } 1025 1026 /******************************************************************************** 1027 * Process completed commands 1028 */ 1029 static void 1030 mly_complete(void *context, int pending) 1031 { 1032 struct mly_softc *sc = (struct mly_softc *)context; 1033 struct mly_command *mc; 1034 void (* mc_complete)(struct mly_command *mc); 1035 1036 1037 debug_called(2); 1038 1039 /* 1040 * Spin pulling commands off the completed queue and processing them. 1041 */ 1042 while ((mc = mly_dequeue_complete(sc)) != NULL) { 1043 1044 /* 1045 * Free controller resources, mark command complete. 1046 * 1047 * Note that as soon as we mark the command complete, it may be freed 1048 * out from under us, so we need to save the mc_complete field in 1049 * order to later avoid dereferencing mc. (We would not expect to 1050 * have a polling/sleeping consumer with mc_complete != NULL). 1051 */ 1052 mly_unmap_command(mc); 1053 mc_complete = mc->mc_complete; 1054 mc->mc_flags |= MLY_CMD_COMPLETE; 1055 1056 /* 1057 * Call completion handler or wake up sleeping consumer. 1058 */ 1059 if (mc_complete != NULL) { 1060 mc_complete(mc); 1061 } else { 1062 wakeup(mc); 1063 } 1064 } 1065 1066 /* 1067 * We may have freed up controller resources which would allow us 1068 * to push more commands onto the controller, so we check here. 1069 */ 1070 mly_startio(sc); 1071 1072 /* 1073 * The controller may have updated the health status information, 1074 * so check for it here. 1075 * 1076 * Note that we only check for health status after a completed command. It 1077 * might be wise to ping the controller occasionally if it's been idle for 1078 * a while just to check up on it. While a filesystem is mounted, or I/O is 1079 * active this isn't really an issue. 1080 */ 1081 if (sc->mly_mmbox->mmm_health.status.change_counter != sc->mly_event_change) { 1082 sc->mly_event_change = sc->mly_mmbox->mmm_health.status.change_counter; 1083 debug(1, "event change %d, event status update, %d -> %d", sc->mly_event_change, 1084 sc->mly_event_waiting, sc->mly_mmbox->mmm_health.status.next_event); 1085 sc->mly_event_waiting = sc->mly_mmbox->mmm_health.status.next_event; 1086 1087 /* wake up anyone that might be interested in this */ 1088 wakeup(&sc->mly_event_change); 1089 } 1090 if (sc->mly_event_counter != sc->mly_event_waiting) 1091 mly_fetch_event(sc); 1092 } 1093 1094 /******************************************************************************** 1095 ******************************************************************************** 1096 Command Buffer Management 1097 ******************************************************************************** 1098 ********************************************************************************/ 1099 1100 /******************************************************************************** 1101 * Allocate a command. 1102 */ 1103 int 1104 mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp) 1105 { 1106 struct mly_command *mc; 1107 1108 debug_called(3); 1109 1110 if ((mc = mly_dequeue_free(sc)) == NULL) 1111 return(ENOMEM); 1112 1113 *mcp = mc; 1114 return(0); 1115 } 1116 1117 /******************************************************************************** 1118 * Release a command back to the freelist. 1119 */ 1120 void 1121 mly_release_command(struct mly_command *mc) 1122 { 1123 debug_called(3); 1124 1125 /* 1126 * Fill in parts of the command that may cause confusion if 1127 * a consumer doesn't when we are later allocated. 1128 */ 1129 mc->mc_data = NULL; 1130 mc->mc_flags = 0; 1131 mc->mc_complete = NULL; 1132 mc->mc_private = NULL; 1133 1134 /* 1135 * By default, we set up to overwrite the command packet with 1136 * sense information. 1137 */ 1138 mc->mc_packet->generic.sense_buffer_address = mc->mc_packetphys; 1139 mc->mc_packet->generic.maximum_sense_size = sizeof(union mly_command_packet); 1140 1141 mly_enqueue_free(mc); 1142 } 1143 1144 /******************************************************************************** 1145 * Map helper for command allocation. 1146 */ 1147 static void 1148 mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1149 { 1150 struct mly_softc *sc = (struct mly_softc *)arg 1151 1152 debug_called(2); 1153 1154 sc->mly_packetphys = segs[0].ds_addr; 1155 } 1156 1157 /******************************************************************************** 1158 * Allocate and initialise command and packet structures. 1159 */ 1160 static int 1161 mly_alloc_commands(struct mly_softc *sc) 1162 { 1163 struct mly_command *mc; 1164 int i; 1165 1166 /* 1167 * Allocate enough space for all the command packets in one chunk and 1168 * map them permanently into controller-visible space. 1169 */ 1170 if (bus_dmamem_alloc(sc->mly_packet_dmat, (void **)&sc->mly_packet, 1171 BUS_DMA_NOWAIT, &sc->mly_packetmap)) { 1172 return(ENOMEM); 1173 } 1174 bus_dmamap_load(sc->mly_packet_dmat, sc->mly_packetmap, sc->mly_packet, 1175 MLY_MAXCOMMANDS * sizeof(union mly_command_packet), 1176 mly_alloc_commands_map, sc, 0); 1177 1178 for (i = 0; i < MLY_MAXCOMMANDS; i++) { 1179 mc = &sc->mly_command[i]; 1180 bzero(mc, sizeof(*mc)); 1181 mc->mc_sc = sc; 1182 mc->mc_slot = MLY_SLOT_START + i; 1183 mc->mc_packet = sc->mly_packet + i; 1184 mc->mc_packetphys = sc->mly_packetphys + (i * sizeof(union mly_command_packet)); 1185 if (!bus_dmamap_create(sc->mly_buffer_dmat, 0, &mc->mc_datamap)) 1186 mly_release_command(mc); 1187 } 1188 return(0); 1189 } 1190 1191 /******************************************************************************** 1192 * Command-mapping helper function - populate this command's s/g table 1193 * with the s/g entries for its data. 1194 */ 1195 static void 1196 mly_map_command_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1197 { 1198 struct mly_command *mc = (struct mly_command *)arg; 1199 struct mly_softc *sc = mc->mc_sc; 1200 struct mly_command_generic *gen = &(mc->mc_packet->generic); 1201 struct mly_sg_entry *sg; 1202 int i, tabofs; 1203 1204 debug_called(3); 1205 1206 /* can we use the transfer structure directly? */ 1207 if (nseg <= 2) { 1208 sg = &gen->transfer.direct.sg[0]; 1209 gen->command_control.extended_sg_table = 0; 1210 } else { 1211 tabofs = ((mc->mc_slot - MLY_SLOT_START) * MLY_MAXSGENTRIES); 1212 sg = sc->mly_sg_table + tabofs; 1213 gen->transfer.indirect.entries[0] = nseg; 1214 gen->transfer.indirect.table_physaddr[0] = sc->mly_sg_busaddr + (tabofs * sizeof(struct mly_sg_entry)); 1215 gen->command_control.extended_sg_table = 1; 1216 } 1217 1218 /* copy the s/g table */ 1219 for (i = 0; i < nseg; i++) { 1220 sg[i].physaddr = segs[i].ds_addr; 1221 sg[i].length = segs[i].ds_len; 1222 } 1223 1224 } 1225 1226 #if 0 1227 /******************************************************************************** 1228 * Command-mapping helper function - save the cdb's physical address. 1229 * 1230 * We don't support 'large' SCSI commands at this time, so this is unused. 1231 */ 1232 static void 1233 mly_map_command_cdb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1234 { 1235 struct mly_command *mc = (struct mly_command *)arg; 1236 1237 debug_called(3); 1238 1239 /* XXX can we safely assume that a CDB will never cross a page boundary? */ 1240 if ((segs[0].ds_addr % PAGE_SIZE) > 1241 ((segs[0].ds_addr + mc->mc_packet->scsi_large.cdb_length) % PAGE_SIZE)) 1242 panic("cdb crosses page boundary"); 1243 1244 /* fix up fields in the command packet */ 1245 mc->mc_packet->scsi_large.cdb_physaddr = segs[0].ds_addr; 1246 } 1247 #endif 1248 1249 /******************************************************************************** 1250 * Map a command into controller-visible space 1251 */ 1252 static void 1253 mly_map_command(struct mly_command *mc) 1254 { 1255 struct mly_softc *sc = mc->mc_sc; 1256 1257 debug_called(2); 1258 1259 /* don't map more than once */ 1260 if (mc->mc_flags & MLY_CMD_MAPPED) 1261 return; 1262 1263 /* does the command have a data buffer? */ 1264 if (mc->mc_data != NULL) 1265 bus_dmamap_load(sc->mly_buffer_dmat, mc->mc_datamap, mc->mc_data, mc->mc_length, 1266 mly_map_command_sg, mc, 0); 1267 1268 if (mc->mc_flags & MLY_CMD_DATAIN) 1269 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREREAD); 1270 if (mc->mc_flags & MLY_CMD_DATAOUT) 1271 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREWRITE); 1272 1273 mc->mc_flags |= MLY_CMD_MAPPED; 1274 } 1275 1276 /******************************************************************************** 1277 * Unmap a command from controller-visible space 1278 */ 1279 static void 1280 mly_unmap_command(struct mly_command *mc) 1281 { 1282 struct mly_softc *sc = mc->mc_sc; 1283 1284 debug_called(2); 1285 1286 if (!(mc->mc_flags & MLY_CMD_MAPPED)) 1287 return; 1288 1289 if (mc->mc_flags & MLY_CMD_DATAIN) 1290 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTREAD); 1291 if (mc->mc_flags & MLY_CMD_DATAOUT) 1292 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTWRITE); 1293 1294 /* does the command have a data buffer? */ 1295 if (mc->mc_data != NULL) 1296 bus_dmamap_unload(sc->mly_buffer_dmat, mc->mc_datamap); 1297 1298 mc->mc_flags &= ~MLY_CMD_MAPPED; 1299 } 1300 1301 /******************************************************************************** 1302 ******************************************************************************** 1303 Hardware Control 1304 ******************************************************************************** 1305 ********************************************************************************/ 1306 1307 /******************************************************************************** 1308 * Handshake with the firmware while the card is being initialised. 1309 */ 1310 static int 1311 mly_fwhandshake(struct mly_softc *sc) 1312 { 1313 u_int8_t error, param0, param1; 1314 int spinup = 0; 1315 1316 debug_called(1); 1317 1318 /* set HM_STSACK and let the firmware initialise */ 1319 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 1320 DELAY(1000); /* too short? */ 1321 1322 /* if HM_STSACK is still true, the controller is initialising */ 1323 if (!MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) 1324 return(0); 1325 mly_printf(sc, "controller initialisation started\n"); 1326 1327 /* spin waiting for initialisation to finish, or for a message to be delivered */ 1328 while (MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) { 1329 /* check for a message */ 1330 if (MLY_ERROR_VALID(sc)) { 1331 error = MLY_GET_REG(sc, sc->mly_error_status) & ~MLY_MSG_EMPTY; 1332 param0 = MLY_GET_REG(sc, sc->mly_command_mailbox); 1333 param1 = MLY_GET_REG(sc, sc->mly_command_mailbox + 1); 1334 1335 switch(error) { 1336 case MLY_MSG_SPINUP: 1337 if (!spinup) { 1338 mly_printf(sc, "drive spinup in progress\n"); 1339 spinup = 1; /* only print this once (should print drive being spun?) */ 1340 } 1341 break; 1342 case MLY_MSG_RACE_RECOVERY_FAIL: 1343 mly_printf(sc, "mirror race recovery failed, one or more drives offline\n"); 1344 break; 1345 case MLY_MSG_RACE_IN_PROGRESS: 1346 mly_printf(sc, "mirror race recovery in progress\n"); 1347 break; 1348 case MLY_MSG_RACE_ON_CRITICAL: 1349 mly_printf(sc, "mirror race recovery on a critical drive\n"); 1350 break; 1351 case MLY_MSG_PARITY_ERROR: 1352 mly_printf(sc, "FATAL MEMORY PARITY ERROR\n"); 1353 return(ENXIO); 1354 default: 1355 mly_printf(sc, "unknown initialisation code 0x%x\n", error); 1356 } 1357 } 1358 } 1359 return(0); 1360 } 1361 1362 /******************************************************************************** 1363 ******************************************************************************** 1364 Debugging and Diagnostics 1365 ******************************************************************************** 1366 ********************************************************************************/ 1367 1368 /******************************************************************************** 1369 * Print some information about the controller. 1370 */ 1371 static void 1372 mly_describe_controller(struct mly_softc *sc) 1373 { 1374 struct mly_ioctl_getcontrollerinfo *mi = sc->mly_controllerinfo; 1375 1376 mly_printf(sc, "%16s, %d channel%s, firmware %d.%02d-%d-%02d (%02d%02d%02d%02d), %dMB RAM\n", 1377 mi->controller_name, mi->physical_channels_present, (mi->physical_channels_present) > 1 ? "s" : "", 1378 mi->fw_major, mi->fw_minor, mi->fw_turn, mi->fw_build, /* XXX turn encoding? */ 1379 mi->fw_century, mi->fw_year, mi->fw_month, mi->fw_day, 1380 mi->memory_size); 1381 1382 if (bootverbose) { 1383 mly_printf(sc, "%s %s (%x), %dMHz %d-bit %.16s\n", 1384 mly_describe_code(mly_table_oemname, mi->oem_information), 1385 mly_describe_code(mly_table_controllertype, mi->controller_type), mi->controller_type, 1386 mi->interface_speed, mi->interface_width, mi->interface_name); 1387 mly_printf(sc, "%dMB %dMHz %d-bit %s%s%s, cache %dMB\n", 1388 mi->memory_size, mi->memory_speed, mi->memory_width, 1389 mly_describe_code(mly_table_memorytype, mi->memory_type), 1390 mi->memory_parity ? "+parity": "",mi->memory_ecc ? "+ECC": "", 1391 mi->cache_size); 1392 mly_printf(sc, "CPU: %s @ %dMHZ\n", 1393 mly_describe_code(mly_table_cputype, mi->cpu[0].type), mi->cpu[0].speed); 1394 if (mi->l2cache_size != 0) 1395 mly_printf(sc, "%dKB L2 cache\n", mi->l2cache_size); 1396 if (mi->exmemory_size != 0) 1397 mly_printf(sc, "%dMB %dMHz %d-bit private %s%s%s\n", 1398 mi->exmemory_size, mi->exmemory_speed, mi->exmemory_width, 1399 mly_describe_code(mly_table_memorytype, mi->exmemory_type), 1400 mi->exmemory_parity ? "+parity": "",mi->exmemory_ecc ? "+ECC": ""); 1401 mly_printf(sc, "battery backup %s\n", mi->bbu_present ? "present" : "not installed"); 1402 mly_printf(sc, "maximum data transfer %d blocks, maximum sg entries/command %d\n", 1403 mi->maximum_block_count, mi->maximum_sg_entries); 1404 mly_printf(sc, "logical devices present/critical/offline %d/%d/%d\n", 1405 mi->logical_devices_present, mi->logical_devices_critical, mi->logical_devices_offline); 1406 mly_printf(sc, "physical devices present %d\n", 1407 mi->physical_devices_present); 1408 mly_printf(sc, "physical disks present/offline %d/%d\n", 1409 mi->physical_disks_present, mi->physical_disks_offline); 1410 mly_printf(sc, "%d physical channel%s, %d virtual channel%s of %d possible\n", 1411 mi->physical_channels_present, mi->physical_channels_present == 1 ? "" : "s", 1412 mi->virtual_channels_present, mi->virtual_channels_present == 1 ? "" : "s", 1413 mi->virtual_channels_possible); 1414 mly_printf(sc, "%d parallel commands supported\n", mi->maximum_parallel_commands); 1415 mly_printf(sc, "%dMB flash ROM, %d of %d maximum cycles\n", 1416 mi->flash_size, mi->flash_age, mi->flash_maximum_age); 1417 } 1418 } 1419 1420 #ifdef MLY_DEBUG 1421 /******************************************************************************** 1422 * Print some controller state 1423 */ 1424 static void 1425 mly_printstate(struct mly_softc *sc) 1426 { 1427 mly_printf(sc, "IDBR %02x ODBR %02x ERROR %02x (%x %x %x)\n", 1428 MLY_GET_REG(sc, sc->mly_idbr), 1429 MLY_GET_REG(sc, sc->mly_odbr), 1430 MLY_GET_REG(sc, sc->mly_error_status), 1431 sc->mly_idbr, 1432 sc->mly_odbr, 1433 sc->mly_error_status); 1434 mly_printf(sc, "IMASK %02x ISTATUS %02x\n", 1435 MLY_GET_REG(sc, sc->mly_interrupt_mask), 1436 MLY_GET_REG(sc, sc->mly_interrupt_status)); 1437 mly_printf(sc, "COMMAND %02x %02x %02x %02x %02x %02x %02x %02x\n", 1438 MLY_GET_REG(sc, sc->mly_command_mailbox), 1439 MLY_GET_REG(sc, sc->mly_command_mailbox + 1), 1440 MLY_GET_REG(sc, sc->mly_command_mailbox + 2), 1441 MLY_GET_REG(sc, sc->mly_command_mailbox + 3), 1442 MLY_GET_REG(sc, sc->mly_command_mailbox + 4), 1443 MLY_GET_REG(sc, sc->mly_command_mailbox + 5), 1444 MLY_GET_REG(sc, sc->mly_command_mailbox + 6), 1445 MLY_GET_REG(sc, sc->mly_command_mailbox + 7)); 1446 mly_printf(sc, "STATUS %02x %02x %02x %02x %02x %02x %02x %02x\n", 1447 MLY_GET_REG(sc, sc->mly_status_mailbox), 1448 MLY_GET_REG(sc, sc->mly_status_mailbox + 1), 1449 MLY_GET_REG(sc, sc->mly_status_mailbox + 2), 1450 MLY_GET_REG(sc, sc->mly_status_mailbox + 3), 1451 MLY_GET_REG(sc, sc->mly_status_mailbox + 4), 1452 MLY_GET_REG(sc, sc->mly_status_mailbox + 5), 1453 MLY_GET_REG(sc, sc->mly_status_mailbox + 6), 1454 MLY_GET_REG(sc, sc->mly_status_mailbox + 7)); 1455 mly_printf(sc, " %04x %08x\n", 1456 MLY_GET_REG2(sc, sc->mly_status_mailbox), 1457 MLY_GET_REG4(sc, sc->mly_status_mailbox + 4)); 1458 } 1459 1460 struct mly_softc *mly_softc0 = NULL; 1461 void 1462 mly_printstate0(void) 1463 { 1464 if (mly_softc0 != NULL) 1465 mly_printstate(mly_softc0); 1466 } 1467 1468 /******************************************************************************** 1469 * Print a command 1470 */ 1471 static void 1472 mly_print_command(struct mly_command *mc) 1473 { 1474 struct mly_softc *sc = mc->mc_sc; 1475 1476 mly_printf(sc, "COMMAND @ %p\n", mc); 1477 mly_printf(sc, " slot %d\n", mc->mc_slot); 1478 mly_printf(sc, " status 0x%x\n", mc->mc_status); 1479 mly_printf(sc, " sense len %d\n", mc->mc_sense); 1480 mly_printf(sc, " resid %d\n", mc->mc_resid); 1481 mly_printf(sc, " packet %p/0x%llx\n", mc->mc_packet, mc->mc_packetphys); 1482 if (mc->mc_packet != NULL) 1483 mly_print_packet(mc); 1484 mly_printf(sc, " data %p/%d\n", mc->mc_data, mc->mc_length); 1485 mly_printf(sc, " flags %b\n", mc->mc_flags, "\20\1busy\2complete\3slotted\4mapped\5datain\6dataout\n"); 1486 mly_printf(sc, " complete %p\n", mc->mc_complete); 1487 mly_printf(sc, " private %p\n", mc->mc_private); 1488 } 1489 1490 /******************************************************************************** 1491 * Print a command packet 1492 */ 1493 static void 1494 mly_print_packet(struct mly_command *mc) 1495 { 1496 struct mly_softc *sc = mc->mc_sc; 1497 struct mly_command_generic *ge = (struct mly_command_generic *)mc->mc_packet; 1498 struct mly_command_scsi_small *ss = (struct mly_command_scsi_small *)mc->mc_packet; 1499 struct mly_command_scsi_large *sl = (struct mly_command_scsi_large *)mc->mc_packet; 1500 struct mly_command_ioctl *io = (struct mly_command_ioctl *)mc->mc_packet; 1501 int transfer; 1502 1503 mly_printf(sc, " command_id %d\n", ge->command_id); 1504 mly_printf(sc, " opcode %d\n", ge->opcode); 1505 mly_printf(sc, " command_control fua %d dpo %d est %d dd %s nas %d ddis %d\n", 1506 ge->command_control.force_unit_access, 1507 ge->command_control.disable_page_out, 1508 ge->command_control.extended_sg_table, 1509 (ge->command_control.data_direction == MLY_CCB_WRITE) ? "WRITE" : "READ", 1510 ge->command_control.no_auto_sense, 1511 ge->command_control.disable_disconnect); 1512 mly_printf(sc, " data_size %d\n", ge->data_size); 1513 mly_printf(sc, " sense_buffer_address 0x%llx\n", ge->sense_buffer_address); 1514 mly_printf(sc, " lun %d\n", ge->addr.phys.lun); 1515 mly_printf(sc, " target %d\n", ge->addr.phys.target); 1516 mly_printf(sc, " channel %d\n", ge->addr.phys.channel); 1517 mly_printf(sc, " logical device %d\n", ge->addr.log.logdev); 1518 mly_printf(sc, " controller %d\n", ge->addr.phys.controller); 1519 mly_printf(sc, " timeout %d %s\n", 1520 ge->timeout.value, 1521 (ge->timeout.scale == MLY_TIMEOUT_SECONDS) ? "seconds" : 1522 ((ge->timeout.scale == MLY_TIMEOUT_MINUTES) ? "minutes" : "hours")); 1523 mly_printf(sc, " maximum_sense_size %d\n", ge->maximum_sense_size); 1524 switch(ge->opcode) { 1525 case MDACMD_SCSIPT: 1526 case MDACMD_SCSI: 1527 mly_printf(sc, " cdb length %d\n", ss->cdb_length); 1528 mly_printf(sc, " cdb %*D\n", ss->cdb_length, ss->cdb, " "); 1529 transfer = 1; 1530 break; 1531 case MDACMD_SCSILC: 1532 case MDACMD_SCSILCPT: 1533 mly_printf(sc, " cdb length %d\n", sl->cdb_length); 1534 mly_printf(sc, " cdb 0x%llx\n", sl->cdb_physaddr); 1535 transfer = 1; 1536 break; 1537 case MDACMD_IOCTL: 1538 mly_printf(sc, " sub_ioctl 0x%x\n", io->sub_ioctl); 1539 switch(io->sub_ioctl) { 1540 case MDACIOCTL_SETMEMORYMAILBOX: 1541 mly_printf(sc, " health_buffer_size %d\n", 1542 io->param.setmemorymailbox.health_buffer_size); 1543 mly_printf(sc, " health_buffer_phys 0x%llx\n", 1544 io->param.setmemorymailbox.health_buffer_physaddr); 1545 mly_printf(sc, " command_mailbox 0x%llx\n", 1546 io->param.setmemorymailbox.command_mailbox_physaddr); 1547 mly_printf(sc, " status_mailbox 0x%llx\n", 1548 io->param.setmemorymailbox.status_mailbox_physaddr); 1549 transfer = 0; 1550 break; 1551 1552 case MDACIOCTL_SETREALTIMECLOCK: 1553 case MDACIOCTL_GETHEALTHSTATUS: 1554 case MDACIOCTL_GETCONTROLLERINFO: 1555 case MDACIOCTL_GETLOGDEVINFOVALID: 1556 case MDACIOCTL_GETPHYSDEVINFOVALID: 1557 case MDACIOCTL_GETPHYSDEVSTATISTICS: 1558 case MDACIOCTL_GETLOGDEVSTATISTICS: 1559 case MDACIOCTL_GETCONTROLLERSTATISTICS: 1560 case MDACIOCTL_GETBDT_FOR_SYSDRIVE: 1561 case MDACIOCTL_CREATENEWCONF: 1562 case MDACIOCTL_ADDNEWCONF: 1563 case MDACIOCTL_GETDEVCONFINFO: 1564 case MDACIOCTL_GETFREESPACELIST: 1565 case MDACIOCTL_MORE: 1566 case MDACIOCTL_SETPHYSDEVPARAMETER: 1567 case MDACIOCTL_GETPHYSDEVPARAMETER: 1568 case MDACIOCTL_GETLOGDEVPARAMETER: 1569 case MDACIOCTL_SETLOGDEVPARAMETER: 1570 mly_printf(sc, " param %10D\n", io->param.data.param, " "); 1571 transfer = 1; 1572 break; 1573 1574 case MDACIOCTL_GETEVENT: 1575 mly_printf(sc, " event %d\n", 1576 io->param.getevent.sequence_number_low + ((u_int32_t)io->addr.log.logdev << 16)); 1577 transfer = 1; 1578 break; 1579 1580 case MDACIOCTL_SETRAIDDEVSTATE: 1581 mly_printf(sc, " state %d\n", io->param.setraiddevstate.state); 1582 transfer = 0; 1583 break; 1584 1585 case MDACIOCTL_XLATEPHYSDEVTORAIDDEV: 1586 mly_printf(sc, " raid_device %d\n", io->param.xlatephysdevtoraiddev.raid_device); 1587 mly_printf(sc, " controller %d\n", io->param.xlatephysdevtoraiddev.controller); 1588 mly_printf(sc, " channel %d\n", io->param.xlatephysdevtoraiddev.channel); 1589 mly_printf(sc, " target %d\n", io->param.xlatephysdevtoraiddev.target); 1590 mly_printf(sc, " lun %d\n", io->param.xlatephysdevtoraiddev.lun); 1591 transfer = 0; 1592 break; 1593 1594 case MDACIOCTL_GETGROUPCONFINFO: 1595 mly_printf(sc, " group %d\n", io->param.getgroupconfinfo.group); 1596 transfer = 1; 1597 break; 1598 1599 case MDACIOCTL_GET_SUBSYSTEM_DATA: 1600 case MDACIOCTL_SET_SUBSYSTEM_DATA: 1601 case MDACIOCTL_STARTDISOCVERY: 1602 case MDACIOCTL_INITPHYSDEVSTART: 1603 case MDACIOCTL_INITPHYSDEVSTOP: 1604 case MDACIOCTL_INITRAIDDEVSTART: 1605 case MDACIOCTL_INITRAIDDEVSTOP: 1606 case MDACIOCTL_REBUILDRAIDDEVSTART: 1607 case MDACIOCTL_REBUILDRAIDDEVSTOP: 1608 case MDACIOCTL_MAKECONSISTENTDATASTART: 1609 case MDACIOCTL_MAKECONSISTENTDATASTOP: 1610 case MDACIOCTL_CONSISTENCYCHECKSTART: 1611 case MDACIOCTL_CONSISTENCYCHECKSTOP: 1612 case MDACIOCTL_RESETDEVICE: 1613 case MDACIOCTL_FLUSHDEVICEDATA: 1614 case MDACIOCTL_PAUSEDEVICE: 1615 case MDACIOCTL_UNPAUSEDEVICE: 1616 case MDACIOCTL_LOCATEDEVICE: 1617 case MDACIOCTL_SETMASTERSLAVEMODE: 1618 case MDACIOCTL_DELETERAIDDEV: 1619 case MDACIOCTL_REPLACEINTERNALDEV: 1620 case MDACIOCTL_CLEARCONF: 1621 case MDACIOCTL_GETCONTROLLERPARAMETER: 1622 case MDACIOCTL_SETCONTRLLERPARAMETER: 1623 case MDACIOCTL_CLEARCONFSUSPMODE: 1624 case MDACIOCTL_STOREIMAGE: 1625 case MDACIOCTL_READIMAGE: 1626 case MDACIOCTL_FLASHIMAGES: 1627 case MDACIOCTL_RENAMERAIDDEV: 1628 default: /* no idea what to print */ 1629 transfer = 0; 1630 break; 1631 } 1632 break; 1633 1634 case MDACMD_IOCTLCHECK: 1635 case MDACMD_MEMCOPY: 1636 default: 1637 transfer = 0; 1638 break; /* print nothing */ 1639 } 1640 if (transfer) { 1641 if (ge->command_control.extended_sg_table) { 1642 mly_printf(sc, " sg table 0x%llx/%d\n", 1643 ge->transfer.indirect.table_physaddr[0], ge->transfer.indirect.entries[0]); 1644 } else { 1645 mly_printf(sc, " 0000 0x%llx/%lld\n", 1646 ge->transfer.direct.sg[0].physaddr, ge->transfer.direct.sg[0].length); 1647 mly_printf(sc, " 0001 0x%llx/%lld\n", 1648 ge->transfer.direct.sg[1].physaddr, ge->transfer.direct.sg[1].length); 1649 } 1650 } 1651 } 1652 1653 /******************************************************************************** 1654 * Panic in a slightly informative fashion 1655 */ 1656 static void 1657 mly_panic(struct mly_softc *sc, char *reason) 1658 { 1659 mly_printstate(sc); 1660 panic(reason); 1661 } 1662 #endif 1663 1664 /******************************************************************************** 1665 * Print queue statistics, callable from DDB. 1666 */ 1667 void 1668 mly_print_controller(int controller) 1669 { 1670 struct mly_softc *sc; 1671 1672 if ((sc = devclass_get_softc(devclass_find("mly"), controller)) == NULL) { 1673 printf("mly: controller %d invalid\n", controller); 1674 } else { 1675 device_printf(sc->mly_dev, "queue curr max\n"); 1676 device_printf(sc->mly_dev, "free %04d/%04d\n", 1677 sc->mly_qstat[MLYQ_FREE].q_length, sc->mly_qstat[MLYQ_FREE].q_max); 1678 device_printf(sc->mly_dev, "ready %04d/%04d\n", 1679 sc->mly_qstat[MLYQ_READY].q_length, sc->mly_qstat[MLYQ_READY].q_max); 1680 device_printf(sc->mly_dev, "busy %04d/%04d\n", 1681 sc->mly_qstat[MLYQ_BUSY].q_length, sc->mly_qstat[MLYQ_BUSY].q_max); 1682 device_printf(sc->mly_dev, "complete %04d/%04d\n", 1683 sc->mly_qstat[MLYQ_COMPLETE].q_length, sc->mly_qstat[MLYQ_COMPLETE].q_max); 1684 } 1685 } 1686 1687 1688 /******************************************************************************** 1689 ******************************************************************************** 1690 Control device interface 1691 ******************************************************************************** 1692 ********************************************************************************/ 1693 1694 /******************************************************************************** 1695 * Accept an open operation on the control device. 1696 */ 1697 static int 1698 mly_user_open(struct dev_open_args *ap) 1699 { 1700 dev_t dev = ap->a_head.a_dev; 1701 int unit = minor(dev); 1702 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 1703 1704 sc->mly_state |= MLY_STATE_OPEN; 1705 return(0); 1706 } 1707 1708 /******************************************************************************** 1709 * Accept the last close on the control device. 1710 */ 1711 static int 1712 mly_user_close(struct dev_close_args *ap) 1713 { 1714 dev_t dev = ap->a_head.a_dev; 1715 int unit = minor(dev); 1716 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 1717 1718 sc->mly_state &= ~MLY_STATE_OPEN; 1719 return (0); 1720 } 1721 1722 /******************************************************************************** 1723 * Handle controller-specific control operations. 1724 */ 1725 static int 1726 mly_user_ioctl(struct dev_ioctl_args *ap) 1727 { 1728 dev_t dev = ap->a_head.a_dev; 1729 struct mly_softc *sc = (struct mly_softc *)dev->si_drv1; 1730 struct mly_user_command *uc = (struct mly_user_command *)ap->a_data; 1731 struct mly_user_health *uh = (struct mly_user_health *)ap->a_data; 1732 1733 switch(ap->a_cmd) { 1734 case MLYIO_COMMAND: 1735 return(mly_user_command(sc, uc)); 1736 case MLYIO_HEALTH: 1737 return(mly_user_health(sc, uh)); 1738 default: 1739 return(ENOIOCTL); 1740 } 1741 } 1742 1743 /******************************************************************************** 1744 * Execute a command passed in from userspace. 1745 * 1746 * The control structure contains the actual command for the controller, as well 1747 * as the user-space data pointer and data size, and an optional sense buffer 1748 * size/pointer. On completion, the data size is adjusted to the command 1749 * residual, and the sense buffer size to the size of the returned sense data. 1750 * 1751 */ 1752 static int 1753 mly_user_command(struct mly_softc *sc, struct mly_user_command *uc) 1754 { 1755 struct mly_command *mc; 1756 int error; 1757 1758 /* allocate a command */ 1759 if (mly_alloc_command(sc, &mc)) { 1760 error = ENOMEM; 1761 goto out; /* XXX Linux version will wait for a command */ 1762 } 1763 1764 /* handle data size/direction */ 1765 mc->mc_length = (uc->DataTransferLength >= 0) ? uc->DataTransferLength : -uc->DataTransferLength; 1766 if (mc->mc_length > 0) 1767 mc->mc_data = malloc(mc->mc_length, M_DEVBUF, M_INTWAIT); 1768 if (uc->DataTransferLength > 0) { 1769 mc->mc_flags |= MLY_CMD_DATAIN; 1770 bzero(mc->mc_data, mc->mc_length); 1771 } 1772 if (uc->DataTransferLength < 0) { 1773 mc->mc_flags |= MLY_CMD_DATAOUT; 1774 if ((error = copyin(uc->DataTransferBuffer, mc->mc_data, mc->mc_length)) != 0) 1775 goto out; 1776 } 1777 1778 /* copy the controller command */ 1779 bcopy(&uc->CommandMailbox, mc->mc_packet, sizeof(uc->CommandMailbox)); 1780 1781 /* clear command completion handler so that we get woken up */ 1782 mc->mc_complete = NULL; 1783 1784 /* execute the command */ 1785 crit_enter(); 1786 mly_requeue_ready(mc); 1787 mly_startio(sc); 1788 while (!(mc->mc_flags & MLY_CMD_COMPLETE)) 1789 tsleep(mc, 0, "mlyioctl", 0); 1790 crit_exit(); 1791 1792 /* return the data to userspace */ 1793 if (uc->DataTransferLength > 0) 1794 if ((error = copyout(mc->mc_data, uc->DataTransferBuffer, mc->mc_length)) != 0) 1795 goto out; 1796 1797 /* return the sense buffer to userspace */ 1798 if ((uc->RequestSenseLength > 0) && (mc->mc_sense > 0)) { 1799 if ((error = copyout(mc->mc_packet, uc->RequestSenseBuffer, 1800 min(uc->RequestSenseLength, mc->mc_sense))) != 0) 1801 goto out; 1802 } 1803 1804 /* return command results to userspace (caller will copy out) */ 1805 uc->DataTransferLength = mc->mc_resid; 1806 uc->RequestSenseLength = min(uc->RequestSenseLength, mc->mc_sense); 1807 uc->CommandStatus = mc->mc_status; 1808 error = 0; 1809 1810 out: 1811 if (mc->mc_data != NULL) 1812 free(mc->mc_data, M_DEVBUF); 1813 if (mc != NULL) 1814 mly_release_command(mc); 1815 return(error); 1816 } 1817 1818 /******************************************************************************** 1819 * Return health status to userspace. If the health change index in the user 1820 * structure does not match that currently exported by the controller, we 1821 * return the current status immediately. Otherwise, we block until either 1822 * interrupted or new status is delivered. 1823 */ 1824 static int 1825 mly_user_health(struct mly_softc *sc, struct mly_user_health *uh) 1826 { 1827 struct mly_health_status mh; 1828 int error; 1829 1830 /* fetch the current health status from userspace */ 1831 if ((error = copyin(uh->HealthStatusBuffer, &mh, sizeof(mh))) != 0) 1832 return(error); 1833 1834 /* spin waiting for a status update */ 1835 crit_enter(); 1836 error = EWOULDBLOCK; 1837 while ((error != 0) && (sc->mly_event_change == mh.change_counter)) 1838 error = tsleep(&sc->mly_event_change, PCATCH, "mlyhealth", 0); 1839 crit_exit(); 1840 1841 /* copy the controller's health status buffer out (there is a race here if it changes again) */ 1842 error = copyout(&sc->mly_mmbox->mmm_health.status, uh->HealthStatusBuffer, 1843 sizeof(uh->HealthStatusBuffer)); 1844 return(error); 1845 } 1846