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 1.50 2010/01/28 08:41:30 mav Exp $ 28 */ 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/malloc.h> 33 #include <sys/kernel.h> 34 #include <sys/bus.h> 35 #include <sys/conf.h> 36 #include <sys/device.h> 37 #include <sys/ctype.h> 38 #include <sys/stat.h> 39 #include <sys/rman.h> 40 #include <sys/thread2.h> 41 42 #include <bus/cam/cam.h> 43 #include <bus/cam/cam_ccb.h> 44 #include <bus/cam/cam_periph.h> 45 #include <bus/cam/cam_sim.h> 46 #include <bus/cam/cam_xpt_periph.h> 47 #include <bus/cam/cam_xpt_sim.h> 48 #include <bus/cam/scsi/scsi_all.h> 49 #include <bus/cam/scsi/scsi_message.h> 50 51 #include <bus/pci/pcireg.h> 52 #include <bus/pci/pcivar.h> 53 54 #include <dev/raid/mly/mlyreg.h> 55 #include <dev/raid/mly/mlyio.h> 56 #include <dev/raid/mly/mlyvar.h> 57 #include <dev/raid/mly/mly_tables.h> 58 59 static int mly_probe(device_t dev); 60 static int mly_attach(device_t dev); 61 static int mly_pci_attach(struct mly_softc *sc); 62 static int mly_detach(device_t dev); 63 static int mly_shutdown(device_t dev); 64 static void mly_intr(void *arg); 65 66 static int mly_sg_map(struct mly_softc *sc); 67 static void mly_sg_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error); 68 static int mly_mmbox_map(struct mly_softc *sc); 69 static void mly_mmbox_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error); 70 static void mly_free(struct mly_softc *sc); 71 72 static int mly_get_controllerinfo(struct mly_softc *sc); 73 static void mly_scan_devices(struct mly_softc *sc); 74 static void mly_rescan_btl(struct mly_softc *sc, int bus, int target); 75 static void mly_complete_rescan(struct mly_command *mc); 76 static int mly_get_eventstatus(struct mly_softc *sc); 77 static int mly_enable_mmbox(struct mly_softc *sc); 78 static int mly_flush(struct mly_softc *sc); 79 static int mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, 80 size_t datasize, u_int8_t *status, void *sense_buffer, size_t *sense_length); 81 static void mly_check_event(struct mly_softc *sc); 82 static void mly_fetch_event(struct mly_softc *sc); 83 static void mly_complete_event(struct mly_command *mc); 84 static void mly_process_event(struct mly_softc *sc, struct mly_event *me); 85 static void mly_periodic(void *data); 86 87 static int mly_immediate_command(struct mly_command *mc); 88 static int mly_start(struct mly_command *mc); 89 static void mly_done(struct mly_softc *sc); 90 static void mly_complete(void *context, int pending); 91 92 static int mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp); 93 static void mly_release_command(struct mly_command *mc); 94 static void mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error); 95 static int mly_alloc_commands(struct mly_softc *sc); 96 static void mly_release_commands(struct mly_softc *sc); 97 static void mly_map_command(struct mly_command *mc); 98 static void mly_unmap_command(struct mly_command *mc); 99 100 static int mly_cam_attach(struct mly_softc *sc); 101 static void mly_cam_detach(struct mly_softc *sc); 102 static void mly_cam_rescan_btl(struct mly_softc *sc, int bus, int target); 103 static void mly_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb); 104 static void mly_cam_action(struct cam_sim *sim, union ccb *ccb); 105 static int mly_cam_action_io(struct cam_sim *sim, struct ccb_scsiio *csio); 106 static void mly_cam_poll(struct cam_sim *sim); 107 static void mly_cam_complete(struct mly_command *mc); 108 static struct cam_periph *mly_find_periph(struct mly_softc *sc, int bus, int target); 109 static int mly_name_device(struct mly_softc *sc, int bus, int target); 110 111 static int mly_fwhandshake(struct mly_softc *sc); 112 113 static void mly_describe_controller(struct mly_softc *sc); 114 #ifdef MLY_DEBUG 115 static void mly_printstate(struct mly_softc *sc); 116 static void mly_print_command(struct mly_command *mc); 117 static void mly_print_packet(struct mly_command *mc); 118 static void mly_panic(struct mly_softc *sc, char *reason); 119 static int mly_timeout(struct mly_softc *sc); 120 #endif 121 void mly_print_controller(int controller); 122 123 124 static d_open_t mly_user_open; 125 static d_close_t mly_user_close; 126 static d_ioctl_t mly_user_ioctl; 127 static int mly_user_command(struct mly_softc *sc, struct mly_user_command *uc); 128 static int mly_user_health(struct mly_softc *sc, struct mly_user_health *uh); 129 130 #define MLY_CMD_TIMEOUT 20 131 132 static device_method_t mly_methods[] = { 133 /* Device interface */ 134 DEVMETHOD(device_probe, mly_probe), 135 DEVMETHOD(device_attach, mly_attach), 136 DEVMETHOD(device_detach, mly_detach), 137 DEVMETHOD(device_shutdown, mly_shutdown), 138 DEVMETHOD_END 139 }; 140 141 static driver_t mly_pci_driver = { 142 "mly", 143 mly_methods, 144 sizeof(struct mly_softc) 145 }; 146 147 static devclass_t mly_devclass; 148 DRIVER_MODULE(mly, pci, mly_pci_driver, mly_devclass, NULL, NULL); 149 MODULE_DEPEND(mly, pci, 1, 1, 1); 150 MODULE_DEPEND(mly, cam, 1, 1, 1); 151 152 static struct dev_ops mly_ops = { 153 { "mly", 0, 0 }, 154 .d_open = mly_user_open, 155 .d_close = mly_user_close, 156 .d_ioctl = mly_user_ioctl, 157 }; 158 159 /******************************************************************************** 160 ******************************************************************************** 161 Device Interface 162 ******************************************************************************** 163 ********************************************************************************/ 164 165 static struct mly_ident 166 { 167 u_int16_t vendor; 168 u_int16_t device; 169 u_int16_t subvendor; 170 u_int16_t subdevice; 171 int hwif; 172 char *desc; 173 } mly_identifiers[] = { 174 {0x1069, 0xba56, 0x1069, 0x0040, MLY_HWIF_STRONGARM, "Mylex eXtremeRAID 2000"}, 175 {0x1069, 0xba56, 0x1069, 0x0030, MLY_HWIF_STRONGARM, "Mylex eXtremeRAID 3000"}, 176 {0x1069, 0x0050, 0x1069, 0x0050, MLY_HWIF_I960RX, "Mylex AcceleRAID 352"}, 177 {0x1069, 0x0050, 0x1069, 0x0052, MLY_HWIF_I960RX, "Mylex AcceleRAID 170"}, 178 {0x1069, 0x0050, 0x1069, 0x0054, MLY_HWIF_I960RX, "Mylex AcceleRAID 160"}, 179 {0, 0, 0, 0, 0, 0} 180 }; 181 182 /******************************************************************************** 183 * Compare the provided PCI device with the list we support. 184 */ 185 static int 186 mly_probe(device_t dev) 187 { 188 struct mly_ident *m; 189 190 debug_called(1); 191 192 for (m = mly_identifiers; m->vendor != 0; m++) { 193 if ((m->vendor == pci_get_vendor(dev)) && 194 (m->device == pci_get_device(dev)) && 195 ((m->subvendor == 0) || ((m->subvendor == pci_get_subvendor(dev)) && 196 (m->subdevice == pci_get_subdevice(dev))))) { 197 198 device_set_desc(dev, m->desc); 199 return(BUS_PROBE_DEFAULT); /* allow room to be overridden */ 200 } 201 } 202 return(ENXIO); 203 } 204 205 /******************************************************************************** 206 * Initialise the controller and softc 207 */ 208 static int 209 mly_attach(device_t dev) 210 { 211 struct mly_softc *sc = device_get_softc(dev); 212 int error; 213 214 debug_called(1); 215 216 sc->mly_dev = dev; 217 218 #ifdef MLY_DEBUG 219 if (device_get_unit(sc->mly_dev) == 0) 220 mly_softc0 = sc; 221 #endif 222 223 /* 224 * Do PCI-specific initialisation. 225 */ 226 if ((error = mly_pci_attach(sc)) != 0) 227 goto out; 228 229 callout_init(&sc->mly_periodic); 230 callout_init(&sc->mly_timeout); 231 232 /* 233 * Initialise per-controller queues. 234 */ 235 mly_initq_free(sc); 236 mly_initq_busy(sc); 237 mly_initq_complete(sc); 238 239 /* 240 * Initialise command-completion task. 241 */ 242 TASK_INIT(&sc->mly_task_complete, 0, mly_complete, sc); 243 244 /* disable interrupts before we start talking to the controller */ 245 MLY_MASK_INTERRUPTS(sc); 246 247 /* 248 * Wait for the controller to come ready, handshake with the firmware if required. 249 * This is typically only necessary on platforms where the controller BIOS does not 250 * run. 251 */ 252 if ((error = mly_fwhandshake(sc))) 253 goto out; 254 255 /* 256 * Allocate initial command buffers. 257 */ 258 if ((error = mly_alloc_commands(sc))) 259 goto out; 260 261 /* 262 * Obtain controller feature information 263 */ 264 if ((error = mly_get_controllerinfo(sc))) 265 goto out; 266 267 /* 268 * Reallocate command buffers now we know how many we want. 269 */ 270 mly_release_commands(sc); 271 if ((error = mly_alloc_commands(sc))) 272 goto out; 273 274 /* 275 * Get the current event counter for health purposes, populate the initial 276 * health status buffer. 277 */ 278 if ((error = mly_get_eventstatus(sc))) 279 goto out; 280 281 /* 282 * Enable memory-mailbox mode. 283 */ 284 if ((error = mly_enable_mmbox(sc))) 285 goto out; 286 287 /* 288 * Attach to CAM. 289 */ 290 if ((error = mly_cam_attach(sc))) 291 goto out; 292 293 /* 294 * Print a little information about the controller 295 */ 296 mly_describe_controller(sc); 297 298 /* 299 * Mark all attached devices for rescan. 300 */ 301 mly_scan_devices(sc); 302 303 /* 304 * Instigate the first status poll immediately. Rescan completions won't 305 * happen until interrupts are enabled, which should still be before 306 * the SCSI subsystem gets to us, courtesy of the "SCSI settling delay". 307 */ 308 mly_periodic(sc); 309 310 /* 311 * Create the control device. 312 */ 313 sc->mly_dev_t = make_dev(&mly_ops, device_get_unit(sc->mly_dev), 314 UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR, 315 "mly%d", device_get_unit(sc->mly_dev)); 316 sc->mly_dev_t->si_drv1 = sc; 317 318 /* enable interrupts now */ 319 MLY_UNMASK_INTERRUPTS(sc); 320 321 #ifdef MLY_DEBUG 322 callout_reset(&sc->mly_timeout, MLY_CMD_TIMEOUT * hz, 323 (timeout_t *)mly_timeout, sc); 324 #endif 325 326 out: 327 if (error != 0) 328 mly_free(sc); 329 return(error); 330 } 331 332 /******************************************************************************** 333 * Perform PCI-specific initialisation. 334 */ 335 static int 336 mly_pci_attach(struct mly_softc *sc) 337 { 338 int i, error; 339 u_int32_t command; 340 341 debug_called(1); 342 343 /* assume failure is 'not configured' */ 344 error = ENXIO; 345 346 /* 347 * Verify that the adapter is correctly set up in PCI space. 348 * 349 * XXX we shouldn't do this; the PCI code should. 350 */ 351 command = pci_read_config(sc->mly_dev, PCIR_COMMAND, 2); 352 command |= PCIM_CMD_BUSMASTEREN; 353 pci_write_config(sc->mly_dev, PCIR_COMMAND, command, 2); 354 command = pci_read_config(sc->mly_dev, PCIR_COMMAND, 2); 355 if (!(command & PCIM_CMD_BUSMASTEREN)) { 356 mly_printf(sc, "can't enable busmaster feature\n"); 357 goto fail; 358 } 359 if ((command & PCIM_CMD_MEMEN) == 0) { 360 mly_printf(sc, "memory window not available\n"); 361 goto fail; 362 } 363 364 /* 365 * Allocate the PCI register window. 366 */ 367 sc->mly_regs_rid = PCIR_BAR(0); /* first base address register */ 368 if ((sc->mly_regs_resource = bus_alloc_resource_any(sc->mly_dev, 369 SYS_RES_MEMORY, &sc->mly_regs_rid, RF_ACTIVE)) == NULL) { 370 mly_printf(sc, "can't allocate register window\n"); 371 goto fail; 372 } 373 sc->mly_btag = rman_get_bustag(sc->mly_regs_resource); 374 sc->mly_bhandle = rman_get_bushandle(sc->mly_regs_resource); 375 376 /* 377 * Allocate and connect our interrupt. 378 */ 379 sc->mly_irq_rid = 0; 380 if ((sc->mly_irq = bus_alloc_resource_any(sc->mly_dev, SYS_RES_IRQ, 381 &sc->mly_irq_rid, RF_SHAREABLE | RF_ACTIVE)) == NULL) { 382 mly_printf(sc, "can't allocate interrupt\n"); 383 goto fail; 384 } 385 error = bus_setup_intr(sc->mly_dev, sc->mly_irq, 0, 386 mly_intr, sc, &sc->mly_intr, NULL); 387 if (error) { 388 mly_printf(sc, "can't set up interrupt\n"); 389 goto fail; 390 } 391 392 /* assume failure is 'out of memory' */ 393 error = ENOMEM; 394 395 /* 396 * Allocate the parent bus DMA tag appropriate for our PCI interface. 397 * 398 * Note that all of these controllers are 64-bit capable. 399 */ 400 if (bus_dma_tag_create(NULL, /* parent */ 401 1, 0, /* alignment, boundary */ 402 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 403 BUS_SPACE_MAXADDR, /* highaddr */ 404 NULL, NULL, /* filter, filterarg */ 405 MAXBSIZE, MLY_MAX_SGENTRIES, /* maxsize, nsegments */ 406 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 407 BUS_DMA_ALLOCNOW, /* flags */ 408 &sc->mly_parent_dmat)) { 409 mly_printf(sc, "can't allocate parent DMA tag\n"); 410 goto fail; 411 } 412 413 /* 414 * Create DMA tag for mapping buffers into controller-addressable space. 415 */ 416 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */ 417 1, 0, /* alignment, boundary */ 418 BUS_SPACE_MAXADDR, /* lowaddr */ 419 BUS_SPACE_MAXADDR, /* highaddr */ 420 NULL, NULL, /* filter, filterarg */ 421 MAXBSIZE, MLY_MAX_SGENTRIES, /* maxsize, nsegments */ 422 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 423 0, /* flags */ 424 &sc->mly_buffer_dmat)) { 425 mly_printf(sc, "can't allocate buffer DMA tag\n"); 426 goto fail; 427 } 428 429 /* 430 * Initialise the DMA tag for command packets. 431 */ 432 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */ 433 1, 0, /* alignment, boundary */ 434 BUS_SPACE_MAXADDR, /* lowaddr */ 435 BUS_SPACE_MAXADDR, /* highaddr */ 436 NULL, NULL, /* filter, filterarg */ 437 sizeof(union mly_command_packet) * MLY_MAX_COMMANDS, 1, /* maxsize, nsegments */ 438 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 439 BUS_DMA_ALLOCNOW, /* flags */ 440 &sc->mly_packet_dmat)) { 441 mly_printf(sc, "can't allocate command packet DMA tag\n"); 442 goto fail; 443 } 444 445 /* 446 * Detect the hardware interface version 447 */ 448 for (i = 0; mly_identifiers[i].vendor != 0; i++) { 449 if ((mly_identifiers[i].vendor == pci_get_vendor(sc->mly_dev)) && 450 (mly_identifiers[i].device == pci_get_device(sc->mly_dev))) { 451 sc->mly_hwif = mly_identifiers[i].hwif; 452 switch(sc->mly_hwif) { 453 case MLY_HWIF_I960RX: 454 debug(1, "set hardware up for i960RX"); 455 sc->mly_doorbell_true = 0x00; 456 sc->mly_command_mailbox = MLY_I960RX_COMMAND_MAILBOX; 457 sc->mly_status_mailbox = MLY_I960RX_STATUS_MAILBOX; 458 sc->mly_idbr = MLY_I960RX_IDBR; 459 sc->mly_odbr = MLY_I960RX_ODBR; 460 sc->mly_error_status = MLY_I960RX_ERROR_STATUS; 461 sc->mly_interrupt_status = MLY_I960RX_INTERRUPT_STATUS; 462 sc->mly_interrupt_mask = MLY_I960RX_INTERRUPT_MASK; 463 break; 464 case MLY_HWIF_STRONGARM: 465 debug(1, "set hardware up for StrongARM"); 466 sc->mly_doorbell_true = 0xff; /* doorbell 'true' is 0 */ 467 sc->mly_command_mailbox = MLY_STRONGARM_COMMAND_MAILBOX; 468 sc->mly_status_mailbox = MLY_STRONGARM_STATUS_MAILBOX; 469 sc->mly_idbr = MLY_STRONGARM_IDBR; 470 sc->mly_odbr = MLY_STRONGARM_ODBR; 471 sc->mly_error_status = MLY_STRONGARM_ERROR_STATUS; 472 sc->mly_interrupt_status = MLY_STRONGARM_INTERRUPT_STATUS; 473 sc->mly_interrupt_mask = MLY_STRONGARM_INTERRUPT_MASK; 474 break; 475 } 476 break; 477 } 478 } 479 480 /* 481 * Create the scatter/gather mappings. 482 */ 483 if ((error = mly_sg_map(sc))) 484 goto fail; 485 486 /* 487 * Allocate and map the memory mailbox 488 */ 489 if ((error = mly_mmbox_map(sc))) 490 goto fail; 491 492 error = 0; 493 494 fail: 495 return(error); 496 } 497 498 /******************************************************************************** 499 * Shut the controller down and detach all our resources. 500 */ 501 static int 502 mly_detach(device_t dev) 503 { 504 int error; 505 506 if ((error = mly_shutdown(dev)) != 0) 507 return(error); 508 509 mly_free(device_get_softc(dev)); 510 return(0); 511 } 512 513 /******************************************************************************** 514 * Bring the controller to a state where it can be safely left alone. 515 * 516 * Note that it should not be necessary to wait for any outstanding commands, 517 * as they should be completed prior to calling here. 518 * 519 * XXX this applies for I/O, but not status polls; we should beware of 520 * the case where a status command is running while we detach. 521 */ 522 static int 523 mly_shutdown(device_t dev) 524 { 525 struct mly_softc *sc = device_get_softc(dev); 526 527 debug_called(1); 528 529 if (sc->mly_state & MLY_STATE_OPEN) 530 return(EBUSY); 531 532 /* kill the periodic event */ 533 callout_stop(&sc->mly_periodic); 534 535 /* flush controller */ 536 mly_printf(sc, "flushing cache..."); 537 kprintf("%s\n", mly_flush(sc) ? "failed" : "done"); 538 539 MLY_MASK_INTERRUPTS(sc); 540 541 return(0); 542 } 543 544 /******************************************************************************* 545 * Take an interrupt, or be poked by other code to look for interrupt-worthy 546 * status. 547 */ 548 static void 549 mly_intr(void *arg) 550 { 551 struct mly_softc *sc = (struct mly_softc *)arg; 552 553 debug_called(2); 554 555 mly_done(sc); 556 }; 557 558 /******************************************************************************** 559 ******************************************************************************** 560 Bus-dependant Resource Management 561 ******************************************************************************** 562 ********************************************************************************/ 563 564 /******************************************************************************** 565 * Allocate memory for the scatter/gather tables 566 */ 567 static int 568 mly_sg_map(struct mly_softc *sc) 569 { 570 size_t segsize; 571 572 debug_called(1); 573 574 /* 575 * Create a single tag describing a region large enough to hold all of 576 * the s/g lists we will need. 577 */ 578 segsize = sizeof(struct mly_sg_entry) * MLY_MAX_COMMANDS *MLY_MAX_SGENTRIES; 579 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */ 580 1, 0, /* alignment,boundary */ 581 BUS_SPACE_MAXADDR, /* lowaddr */ 582 BUS_SPACE_MAXADDR, /* highaddr */ 583 NULL, NULL, /* filter, filterarg */ 584 segsize, 1, /* maxsize, nsegments */ 585 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 586 BUS_DMA_ALLOCNOW, /* flags */ 587 &sc->mly_sg_dmat)) { 588 mly_printf(sc, "can't allocate scatter/gather DMA tag\n"); 589 return(ENOMEM); 590 } 591 592 /* 593 * Allocate enough s/g maps for all commands and permanently map them into 594 * controller-visible space. 595 * 596 * XXX this assumes we can get enough space for all the s/g maps in one 597 * contiguous slab. 598 */ 599 if (bus_dmamem_alloc(sc->mly_sg_dmat, (void **)&sc->mly_sg_table, 600 BUS_DMA_NOWAIT, &sc->mly_sg_dmamap)) { 601 mly_printf(sc, "can't allocate s/g table\n"); 602 return(ENOMEM); 603 } 604 if (bus_dmamap_load(sc->mly_sg_dmat, sc->mly_sg_dmamap, sc->mly_sg_table, 605 segsize, mly_sg_map_helper, sc, BUS_DMA_NOWAIT) != 0) 606 return (ENOMEM); 607 return(0); 608 } 609 610 /******************************************************************************** 611 * Save the physical address of the base of the s/g table. 612 */ 613 static void 614 mly_sg_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error) 615 { 616 struct mly_softc *sc = (struct mly_softc *)arg; 617 618 debug_called(1); 619 620 /* save base of s/g table's address in bus space */ 621 sc->mly_sg_busaddr = segs->ds_addr; 622 } 623 624 /******************************************************************************** 625 * Allocate memory for the memory-mailbox interface 626 */ 627 static int 628 mly_mmbox_map(struct mly_softc *sc) 629 { 630 631 /* 632 * Create a DMA tag for a single contiguous region large enough for the 633 * memory mailbox structure. 634 */ 635 if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */ 636 1, 0, /* alignment,boundary */ 637 BUS_SPACE_MAXADDR, /* lowaddr */ 638 BUS_SPACE_MAXADDR, /* highaddr */ 639 NULL, NULL, /* filter, filterarg */ 640 sizeof(struct mly_mmbox), 1, /* maxsize, nsegments */ 641 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 642 BUS_DMA_ALLOCNOW, /* flags */ 643 &sc->mly_mmbox_dmat)) { 644 mly_printf(sc, "can't allocate memory mailbox DMA tag\n"); 645 return(ENOMEM); 646 } 647 648 /* 649 * Allocate the buffer 650 */ 651 if (bus_dmamem_alloc(sc->mly_mmbox_dmat, (void **)&sc->mly_mmbox, BUS_DMA_NOWAIT, &sc->mly_mmbox_dmamap)) { 652 mly_printf(sc, "can't allocate memory mailbox\n"); 653 return(ENOMEM); 654 } 655 if (bus_dmamap_load(sc->mly_mmbox_dmat, sc->mly_mmbox_dmamap, sc->mly_mmbox, 656 sizeof(struct mly_mmbox), mly_mmbox_map_helper, sc, 657 BUS_DMA_NOWAIT) != 0) 658 return (ENOMEM); 659 bzero(sc->mly_mmbox, sizeof(*sc->mly_mmbox)); 660 return(0); 661 662 } 663 664 /******************************************************************************** 665 * Save the physical address of the memory mailbox 666 */ 667 static void 668 mly_mmbox_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error) 669 { 670 struct mly_softc *sc = (struct mly_softc *)arg; 671 672 debug_called(1); 673 674 sc->mly_mmbox_busaddr = segs->ds_addr; 675 } 676 677 /******************************************************************************** 678 * Free all of the resources associated with (sc) 679 * 680 * Should not be called if the controller is active. 681 */ 682 static void 683 mly_free(struct mly_softc *sc) 684 { 685 686 debug_called(1); 687 688 /* Remove the management device */ 689 destroy_dev(sc->mly_dev_t); 690 691 /* detach from CAM */ 692 mly_cam_detach(sc); 693 694 /* release command memory */ 695 mly_release_commands(sc); 696 697 /* throw away the controllerinfo structure */ 698 if (sc->mly_controllerinfo != NULL) 699 kfree(sc->mly_controllerinfo, M_DEVBUF); 700 701 /* throw away the controllerparam structure */ 702 if (sc->mly_controllerparam != NULL) 703 kfree(sc->mly_controllerparam, M_DEVBUF); 704 705 /* destroy data-transfer DMA tag */ 706 if (sc->mly_buffer_dmat) 707 bus_dma_tag_destroy(sc->mly_buffer_dmat); 708 709 /* free and destroy DMA memory and tag for s/g lists */ 710 if (sc->mly_sg_table) { 711 bus_dmamap_unload(sc->mly_sg_dmat, sc->mly_sg_dmamap); 712 bus_dmamem_free(sc->mly_sg_dmat, sc->mly_sg_table, sc->mly_sg_dmamap); 713 } 714 if (sc->mly_sg_dmat) 715 bus_dma_tag_destroy(sc->mly_sg_dmat); 716 717 /* free and destroy DMA memory and tag for memory mailbox */ 718 if (sc->mly_mmbox) { 719 bus_dmamap_unload(sc->mly_mmbox_dmat, sc->mly_mmbox_dmamap); 720 bus_dmamem_free(sc->mly_mmbox_dmat, sc->mly_mmbox, sc->mly_mmbox_dmamap); 721 } 722 if (sc->mly_mmbox_dmat) 723 bus_dma_tag_destroy(sc->mly_mmbox_dmat); 724 725 /* disconnect the interrupt handler */ 726 if (sc->mly_intr) 727 bus_teardown_intr(sc->mly_dev, sc->mly_irq, sc->mly_intr); 728 if (sc->mly_irq != NULL) 729 bus_release_resource(sc->mly_dev, SYS_RES_IRQ, sc->mly_irq_rid, sc->mly_irq); 730 731 /* destroy the parent DMA tag */ 732 if (sc->mly_parent_dmat) 733 bus_dma_tag_destroy(sc->mly_parent_dmat); 734 735 /* release the register window mapping */ 736 if (sc->mly_regs_resource != NULL) 737 bus_release_resource(sc->mly_dev, SYS_RES_MEMORY, sc->mly_regs_rid, sc->mly_regs_resource); 738 } 739 740 /******************************************************************************** 741 ******************************************************************************** 742 Command Wrappers 743 ******************************************************************************** 744 ********************************************************************************/ 745 746 /******************************************************************************** 747 * Fill in the mly_controllerinfo and mly_controllerparam fields in the softc. 748 */ 749 static int 750 mly_get_controllerinfo(struct mly_softc *sc) 751 { 752 struct mly_command_ioctl mci; 753 u_int8_t status; 754 int error; 755 756 debug_called(1); 757 758 if (sc->mly_controllerinfo != NULL) 759 kfree(sc->mly_controllerinfo, M_DEVBUF); 760 761 /* build the getcontrollerinfo ioctl and send it */ 762 bzero(&mci, sizeof(mci)); 763 sc->mly_controllerinfo = NULL; 764 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERINFO; 765 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerinfo, sizeof(*sc->mly_controllerinfo), 766 &status, NULL, NULL))) 767 return(error); 768 if (status != 0) 769 return(EIO); 770 771 if (sc->mly_controllerparam != NULL) 772 kfree(sc->mly_controllerparam, M_DEVBUF); 773 774 /* build the getcontrollerparameter ioctl and send it */ 775 bzero(&mci, sizeof(mci)); 776 sc->mly_controllerparam = NULL; 777 mci.sub_ioctl = MDACIOCTL_GETCONTROLLERPARAMETER; 778 if ((error = mly_ioctl(sc, &mci, (void **)&sc->mly_controllerparam, sizeof(*sc->mly_controllerparam), 779 &status, NULL, NULL))) 780 return(error); 781 if (status != 0) 782 return(EIO); 783 784 return(0); 785 } 786 787 /******************************************************************************** 788 * Schedule all possible devices for a rescan. 789 * 790 */ 791 static void 792 mly_scan_devices(struct mly_softc *sc) 793 { 794 int bus, target; 795 796 debug_called(1); 797 798 /* 799 * Clear any previous BTL information. 800 */ 801 bzero(&sc->mly_btl, sizeof(sc->mly_btl)); 802 803 /* 804 * Mark all devices as requiring a rescan, and let the next 805 * periodic scan collect them. 806 */ 807 for (bus = 0; bus < sc->mly_cam_channels; bus++) 808 if (MLY_BUS_IS_VALID(sc, bus)) 809 for (target = 0; target < MLY_MAX_TARGETS; target++) 810 sc->mly_btl[bus][target].mb_flags = MLY_BTL_RESCAN; 811 812 } 813 814 /******************************************************************************** 815 * Rescan a device, possibly as a consequence of getting an event which suggests 816 * that it may have changed. 817 * 818 * If we suffer resource starvation, we can abandon the rescan as we'll be 819 * retried. 820 */ 821 static void 822 mly_rescan_btl(struct mly_softc *sc, int bus, int target) 823 { 824 struct mly_command *mc; 825 struct mly_command_ioctl *mci; 826 827 debug_called(1); 828 829 /* check that this bus is valid */ 830 if (!MLY_BUS_IS_VALID(sc, bus)) 831 return; 832 833 /* get a command */ 834 if (mly_alloc_command(sc, &mc)) 835 return; 836 837 /* set up the data buffer */ 838 mc->mc_data = kmalloc(sizeof(union mly_devinfo), M_DEVBUF, M_INTWAIT | M_ZERO); 839 mc->mc_flags |= MLY_CMD_DATAIN; 840 mc->mc_complete = mly_complete_rescan; 841 842 /* 843 * Build the ioctl. 844 */ 845 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl; 846 mci->opcode = MDACMD_IOCTL; 847 mci->addr.phys.controller = 0; 848 mci->timeout.value = 30; 849 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 850 if (MLY_BUS_IS_VIRTUAL(sc, bus)) { 851 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getlogdevinfovalid); 852 mci->sub_ioctl = MDACIOCTL_GETLOGDEVINFOVALID; 853 mci->addr.log.logdev = MLY_LOGDEV_ID(sc, bus, target); 854 debug(1, "logical device %d", mci->addr.log.logdev); 855 } else { 856 mc->mc_length = mci->data_size = sizeof(struct mly_ioctl_getphysdevinfovalid); 857 mci->sub_ioctl = MDACIOCTL_GETPHYSDEVINFOVALID; 858 mci->addr.phys.lun = 0; 859 mci->addr.phys.target = target; 860 mci->addr.phys.channel = bus; 861 debug(1, "physical device %d:%d", mci->addr.phys.channel, mci->addr.phys.target); 862 } 863 864 /* 865 * Dispatch the command. If we successfully send the command, clear the rescan 866 * bit. 867 */ 868 if (mly_start(mc) != 0) { 869 mly_release_command(mc); 870 } else { 871 sc->mly_btl[bus][target].mb_flags &= ~MLY_BTL_RESCAN; /* success */ 872 } 873 } 874 875 /******************************************************************************** 876 * Handle the completion of a rescan operation 877 */ 878 static void 879 mly_complete_rescan(struct mly_command *mc) 880 { 881 struct mly_softc *sc = mc->mc_sc; 882 struct mly_ioctl_getlogdevinfovalid *ldi; 883 struct mly_ioctl_getphysdevinfovalid *pdi; 884 struct mly_command_ioctl *mci; 885 struct mly_btl btl, *btlp; 886 int bus, target, rescan; 887 888 debug_called(1); 889 890 /* 891 * Recover the bus and target from the command. We need these even in 892 * the case where we don't have a useful response. 893 */ 894 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl; 895 if (mci->sub_ioctl == MDACIOCTL_GETLOGDEVINFOVALID) { 896 bus = MLY_LOGDEV_BUS(sc, mci->addr.log.logdev); 897 target = MLY_LOGDEV_TARGET(sc, mci->addr.log.logdev); 898 } else { 899 bus = mci->addr.phys.channel; 900 target = mci->addr.phys.target; 901 } 902 /* XXX validate bus/target? */ 903 904 /* the default result is 'no device' */ 905 bzero(&btl, sizeof(btl)); 906 907 /* if the rescan completed OK, we have possibly-new BTL data */ 908 if (mc->mc_status == 0) { 909 if (mc->mc_length == sizeof(*ldi)) { 910 ldi = (struct mly_ioctl_getlogdevinfovalid *)mc->mc_data; 911 if ((MLY_LOGDEV_BUS(sc, ldi->logical_device_number) != bus) || 912 (MLY_LOGDEV_TARGET(sc, ldi->logical_device_number) != target)) { 913 mly_printf(sc, "WARNING: BTL rescan for %d:%d returned data for %d:%d instead\n", 914 bus, target, MLY_LOGDEV_BUS(sc, ldi->logical_device_number), 915 MLY_LOGDEV_TARGET(sc, ldi->logical_device_number)); 916 /* XXX what can we do about this? */ 917 } 918 btl.mb_flags = MLY_BTL_LOGICAL; 919 btl.mb_type = ldi->raid_level; 920 btl.mb_state = ldi->state; 921 debug(1, "BTL rescan for %d returns %s, %s", ldi->logical_device_number, 922 mly_describe_code(mly_table_device_type, ldi->raid_level), 923 mly_describe_code(mly_table_device_state, ldi->state)); 924 } else if (mc->mc_length == sizeof(*pdi)) { 925 pdi = (struct mly_ioctl_getphysdevinfovalid *)mc->mc_data; 926 if ((pdi->channel != bus) || (pdi->target != target)) { 927 mly_printf(sc, "WARNING: BTL rescan for %d:%d returned data for %d:%d instead\n", 928 bus, target, pdi->channel, pdi->target); 929 /* XXX what can we do about this? */ 930 } 931 btl.mb_flags = MLY_BTL_PHYSICAL; 932 btl.mb_type = MLY_DEVICE_TYPE_PHYSICAL; 933 btl.mb_state = pdi->state; 934 btl.mb_speed = pdi->speed; 935 btl.mb_width = pdi->width; 936 if (pdi->state != MLY_DEVICE_STATE_UNCONFIGURED) 937 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_PROTECTED; 938 debug(1, "BTL rescan for %d:%d returns %s", bus, target, 939 mly_describe_code(mly_table_device_state, pdi->state)); 940 } else { 941 mly_printf(sc, "BTL rescan result invalid\n"); 942 } 943 } 944 945 kfree(mc->mc_data, M_DEVBUF); 946 mly_release_command(mc); 947 948 /* 949 * Decide whether we need to rescan the device. 950 */ 951 rescan = 0; 952 953 /* device type changes (usually between 'nothing' and 'something') */ 954 btlp = &sc->mly_btl[bus][target]; 955 if (btl.mb_flags != btlp->mb_flags) { 956 debug(1, "flags changed, rescanning"); 957 rescan = 1; 958 } 959 960 /* XXX other reasons? */ 961 962 /* 963 * Update BTL information. 964 */ 965 *btlp = btl; 966 967 /* 968 * Perform CAM rescan if required. 969 */ 970 if (rescan) 971 mly_cam_rescan_btl(sc, bus, target); 972 } 973 974 /******************************************************************************** 975 * Get the current health status and set the 'next event' counter to suit. 976 */ 977 static int 978 mly_get_eventstatus(struct mly_softc *sc) 979 { 980 struct mly_command_ioctl mci; 981 struct mly_health_status *mh; 982 u_int8_t status; 983 int error; 984 985 /* build the gethealthstatus ioctl and send it */ 986 bzero(&mci, sizeof(mci)); 987 mh = NULL; 988 mci.sub_ioctl = MDACIOCTL_GETHEALTHSTATUS; 989 990 if ((error = mly_ioctl(sc, &mci, (void **)&mh, sizeof(*mh), &status, NULL, NULL))) 991 return(error); 992 if (status != 0) 993 return(EIO); 994 995 /* get the event counter */ 996 sc->mly_event_change = mh->change_counter; 997 sc->mly_event_waiting = mh->next_event; 998 sc->mly_event_counter = mh->next_event; 999 1000 /* save the health status into the memory mailbox */ 1001 bcopy(mh, &sc->mly_mmbox->mmm_health.status, sizeof(*mh)); 1002 1003 debug(1, "initial change counter %d, event counter %d", mh->change_counter, mh->next_event); 1004 1005 kfree(mh, M_DEVBUF); 1006 return(0); 1007 } 1008 1009 /******************************************************************************** 1010 * Enable the memory mailbox mode. 1011 */ 1012 static int 1013 mly_enable_mmbox(struct mly_softc *sc) 1014 { 1015 struct mly_command_ioctl mci; 1016 u_int8_t *sp, status; 1017 int error; 1018 1019 debug_called(1); 1020 1021 /* build the ioctl and send it */ 1022 bzero(&mci, sizeof(mci)); 1023 mci.sub_ioctl = MDACIOCTL_SETMEMORYMAILBOX; 1024 /* set buffer addresses */ 1025 mci.param.setmemorymailbox.command_mailbox_physaddr = 1026 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_command); 1027 mci.param.setmemorymailbox.status_mailbox_physaddr = 1028 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_status); 1029 mci.param.setmemorymailbox.health_buffer_physaddr = 1030 sc->mly_mmbox_busaddr + offsetof(struct mly_mmbox, mmm_health); 1031 1032 /* set buffer sizes - abuse of data_size field is revolting */ 1033 sp = (u_int8_t *)&mci.data_size; 1034 sp[0] = ((sizeof(union mly_command_packet) * MLY_MMBOX_COMMANDS) / 1024); 1035 sp[1] = (sizeof(union mly_status_packet) * MLY_MMBOX_STATUS) / 1024; 1036 mci.param.setmemorymailbox.health_buffer_size = sizeof(union mly_health_region) / 1024; 1037 1038 debug(1, "memory mailbox at %p (0x%llx/%d 0x%llx/%d 0x%llx/%d", sc->mly_mmbox, 1039 mci.param.setmemorymailbox.command_mailbox_physaddr, sp[0], 1040 mci.param.setmemorymailbox.status_mailbox_physaddr, sp[1], 1041 mci.param.setmemorymailbox.health_buffer_physaddr, 1042 mci.param.setmemorymailbox.health_buffer_size); 1043 1044 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL))) 1045 return(error); 1046 if (status != 0) 1047 return(EIO); 1048 sc->mly_state |= MLY_STATE_MMBOX_ACTIVE; 1049 debug(1, "memory mailbox active"); 1050 return(0); 1051 } 1052 1053 /******************************************************************************** 1054 * Flush all pending I/O from the controller. 1055 */ 1056 static int 1057 mly_flush(struct mly_softc *sc) 1058 { 1059 struct mly_command_ioctl mci; 1060 u_int8_t status; 1061 int error; 1062 1063 debug_called(1); 1064 1065 /* build the ioctl */ 1066 bzero(&mci, sizeof(mci)); 1067 mci.sub_ioctl = MDACIOCTL_FLUSHDEVICEDATA; 1068 mci.param.deviceoperation.operation_device = MLY_OPDEVICE_PHYSICAL_CONTROLLER; 1069 1070 /* pass it off to the controller */ 1071 if ((error = mly_ioctl(sc, &mci, NULL, 0, &status, NULL, NULL))) 1072 return(error); 1073 1074 return((status == 0) ? 0 : EIO); 1075 } 1076 1077 /******************************************************************************** 1078 * Perform an ioctl command. 1079 * 1080 * If (data) is not NULL, the command requires data transfer. If (*data) is NULL 1081 * the command requires data transfer from the controller, and we will allocate 1082 * a buffer for it. If (*data) is not NULL, the command requires data transfer 1083 * to the controller. 1084 * 1085 * XXX passing in the whole ioctl structure is ugly. Better ideas? 1086 * 1087 * XXX we don't even try to handle the case where datasize > 4k. We should. 1088 */ 1089 static int 1090 mly_ioctl(struct mly_softc *sc, struct mly_command_ioctl *ioctl, void **data, size_t datasize, 1091 u_int8_t *status, void *sense_buffer, size_t *sense_length) 1092 { 1093 struct mly_command *mc; 1094 struct mly_command_ioctl *mci; 1095 int error; 1096 1097 debug_called(1); 1098 1099 mc = NULL; 1100 if (mly_alloc_command(sc, &mc)) { 1101 error = ENOMEM; 1102 goto out; 1103 } 1104 1105 /* copy the ioctl structure, but save some important fields and then fixup */ 1106 mci = &mc->mc_packet->ioctl; 1107 ioctl->sense_buffer_address = mci->sense_buffer_address; 1108 ioctl->maximum_sense_size = mci->maximum_sense_size; 1109 *mci = *ioctl; 1110 mci->opcode = MDACMD_IOCTL; 1111 mci->timeout.value = 30; 1112 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 1113 1114 /* handle the data buffer */ 1115 if (data != NULL) { 1116 if (*data == NULL) { 1117 /* allocate data buffer */ 1118 mc->mc_data = kmalloc(datasize, M_DEVBUF, M_INTWAIT); 1119 mc->mc_flags |= MLY_CMD_DATAIN; 1120 } else { 1121 mc->mc_data = *data; 1122 mc->mc_flags |= MLY_CMD_DATAOUT; 1123 } 1124 mc->mc_length = datasize; 1125 mc->mc_packet->generic.data_size = datasize; 1126 } 1127 1128 /* run the command */ 1129 if ((error = mly_immediate_command(mc))) 1130 goto out; 1131 1132 /* clean up and return any data */ 1133 *status = mc->mc_status; 1134 if ((mc->mc_sense > 0) && (sense_buffer != NULL)) { 1135 bcopy(mc->mc_packet, sense_buffer, mc->mc_sense); 1136 *sense_length = mc->mc_sense; 1137 goto out; 1138 } 1139 1140 /* should we return a data pointer? */ 1141 if ((data != NULL) && (*data == NULL)) 1142 *data = mc->mc_data; 1143 1144 /* command completed OK */ 1145 error = 0; 1146 1147 out: 1148 if (mc != NULL) { 1149 /* do we need to free a data buffer we allocated? */ 1150 if (error && (mc->mc_data != NULL) && (*data == NULL)) 1151 kfree(mc->mc_data, M_DEVBUF); 1152 mly_release_command(mc); 1153 } 1154 return(error); 1155 } 1156 1157 /******************************************************************************** 1158 * Check for event(s) outstanding in the controller. 1159 */ 1160 static void 1161 mly_check_event(struct mly_softc *sc) 1162 { 1163 1164 /* 1165 * The controller may have updated the health status information, 1166 * so check for it here. Note that the counters are all in host memory, 1167 * so this check is very cheap. Also note that we depend on checking on 1168 * completion 1169 */ 1170 if (sc->mly_mmbox->mmm_health.status.change_counter != sc->mly_event_change) { 1171 sc->mly_event_change = sc->mly_mmbox->mmm_health.status.change_counter; 1172 debug(1, "event change %d, event status update, %d -> %d", sc->mly_event_change, 1173 sc->mly_event_waiting, sc->mly_mmbox->mmm_health.status.next_event); 1174 sc->mly_event_waiting = sc->mly_mmbox->mmm_health.status.next_event; 1175 1176 /* wake up anyone that might be interested in this */ 1177 wakeup(&sc->mly_event_change); 1178 } 1179 if (sc->mly_event_counter != sc->mly_event_waiting) 1180 mly_fetch_event(sc); 1181 } 1182 1183 /******************************************************************************** 1184 * Fetch one event from the controller. 1185 * 1186 * If we fail due to resource starvation, we'll be retried the next time a 1187 * command completes. 1188 */ 1189 static void 1190 mly_fetch_event(struct mly_softc *sc) 1191 { 1192 struct mly_command *mc; 1193 struct mly_command_ioctl *mci; 1194 u_int32_t event; 1195 1196 debug_called(1); 1197 1198 /* get a command */ 1199 if (mly_alloc_command(sc, &mc)) 1200 return; 1201 1202 /* set up the data buffer */ 1203 mc->mc_data = kmalloc(sizeof(struct mly_event), M_DEVBUF, M_INTWAIT|M_ZERO); 1204 mc->mc_length = sizeof(struct mly_event); 1205 mc->mc_flags |= MLY_CMD_DATAIN; 1206 mc->mc_complete = mly_complete_event; 1207 1208 /* 1209 * Get an event number to fetch. It's possible that we've raced with another 1210 * context for the last event, in which case there will be no more events. 1211 */ 1212 crit_enter(); 1213 if (sc->mly_event_counter == sc->mly_event_waiting) { 1214 mly_release_command(mc); 1215 crit_exit(); 1216 return; 1217 } 1218 event = sc->mly_event_counter++; 1219 crit_exit(); 1220 1221 /* 1222 * Build the ioctl. 1223 * 1224 * At this point we are committed to sending this request, as it 1225 * will be the only one constructed for this particular event number. 1226 */ 1227 mci = (struct mly_command_ioctl *)&mc->mc_packet->ioctl; 1228 mci->opcode = MDACMD_IOCTL; 1229 mci->data_size = sizeof(struct mly_event); 1230 mci->addr.phys.lun = (event >> 16) & 0xff; 1231 mci->addr.phys.target = (event >> 24) & 0xff; 1232 mci->addr.phys.channel = 0; 1233 mci->addr.phys.controller = 0; 1234 mci->timeout.value = 30; 1235 mci->timeout.scale = MLY_TIMEOUT_SECONDS; 1236 mci->sub_ioctl = MDACIOCTL_GETEVENT; 1237 mci->param.getevent.sequence_number_low = event & 0xffff; 1238 1239 debug(1, "fetch event %u", event); 1240 1241 /* 1242 * Submit the command. 1243 * 1244 * Note that failure of mly_start() will result in this event never being 1245 * fetched. 1246 */ 1247 if (mly_start(mc) != 0) { 1248 mly_printf(sc, "couldn't fetch event %u\n", event); 1249 mly_release_command(mc); 1250 } 1251 } 1252 1253 /******************************************************************************** 1254 * Handle the completion of an event poll. 1255 */ 1256 static void 1257 mly_complete_event(struct mly_command *mc) 1258 { 1259 struct mly_softc *sc = mc->mc_sc; 1260 struct mly_event *me = (struct mly_event *)mc->mc_data; 1261 1262 debug_called(1); 1263 1264 /* 1265 * If the event was successfully fetched, process it. 1266 */ 1267 if (mc->mc_status == SCSI_STATUS_OK) { 1268 mly_process_event(sc, me); 1269 kfree(me, M_DEVBUF); 1270 } 1271 mly_release_command(mc); 1272 1273 /* 1274 * Check for another event. 1275 */ 1276 mly_check_event(sc); 1277 } 1278 1279 /******************************************************************************** 1280 * Process a controller event. 1281 */ 1282 static void 1283 mly_process_event(struct mly_softc *sc, struct mly_event *me) 1284 { 1285 struct scsi_sense_data *ssd = (struct scsi_sense_data *)&me->sense[0]; 1286 char *fp, *tp; 1287 int bus, target, event, class, action; 1288 char hexstr[2][12]; 1289 /* 1290 * Errors can be reported using vendor-unique sense data. In this case, the 1291 * event code will be 0x1c (Request sense data present), the sense key will 1292 * be 0x09 (vendor specific), the MSB of the ASC will be set, and the 1293 * actual event code will be a 16-bit value comprised of the ASCQ (low byte) 1294 * and low seven bits of the ASC (low seven bits of the high byte). 1295 */ 1296 if ((me->code == 0x1c) && 1297 ((ssd->flags & SSD_KEY) == SSD_KEY_Vendor_Specific) && 1298 (ssd->add_sense_code & 0x80)) { 1299 event = ((int)(ssd->add_sense_code & ~0x80) << 8) + ssd->add_sense_code_qual; 1300 } else { 1301 event = me->code; 1302 } 1303 1304 /* look up event, get codes */ 1305 fp = mly_describe_code(mly_table_event, event); 1306 1307 debug(1, "Event %d code 0x%x", me->sequence_number, me->code); 1308 1309 /* quiet event? */ 1310 class = fp[0]; 1311 if (isupper(class) && bootverbose) 1312 class = tolower(class); 1313 1314 /* get action code, text string */ 1315 action = fp[1]; 1316 tp = &fp[2]; 1317 1318 /* 1319 * Print some information about the event. 1320 * 1321 * This code uses a table derived from the corresponding portion of the Linux 1322 * driver, and thus the parser is very similar. 1323 */ 1324 switch(class) { 1325 case 'p': /* error on physical device */ 1326 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp); 1327 if (action == 'r') 1328 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN; 1329 break; 1330 case 'l': /* error on logical unit */ 1331 case 'm': /* message about logical unit */ 1332 bus = MLY_LOGDEV_BUS(sc, me->lun); 1333 target = MLY_LOGDEV_TARGET(sc, me->lun); 1334 mly_name_device(sc, bus, target); 1335 mly_printf(sc, "logical device %d (%s) %s\n", me->lun, sc->mly_btl[bus][target].mb_name, tp); 1336 if (action == 'r') 1337 sc->mly_btl[bus][target].mb_flags |= MLY_BTL_RESCAN; 1338 break; 1339 case 's': /* report of sense data */ 1340 if (((ssd->flags & SSD_KEY) == SSD_KEY_NO_SENSE) || 1341 (((ssd->flags & SSD_KEY) == SSD_KEY_NOT_READY) && 1342 (ssd->add_sense_code == 0x04) && 1343 ((ssd->add_sense_code_qual == 0x01) || (ssd->add_sense_code_qual == 0x02)))) 1344 break; /* ignore NO_SENSE or NOT_READY in one case */ 1345 1346 mly_printf(sc, "physical device %d:%d %s\n", me->channel, me->target, tp); 1347 mly_printf(sc, " sense key %d asc %02x ascq %02x\n", 1348 ssd->flags & SSD_KEY, ssd->add_sense_code, ssd->add_sense_code_qual); 1349 mly_printf(sc, " info %s csi %s\n", hexncpy(ssd->info, 4, hexstr[0], 12, NULL), 1350 hexncpy(ssd->cmd_spec_info, 4, hexstr[1], 12, NULL)); 1351 if (action == 'r') 1352 sc->mly_btl[me->channel][me->target].mb_flags |= MLY_BTL_RESCAN; 1353 break; 1354 case 'e': 1355 mly_printf(sc, tp, me->target, me->lun); 1356 kprintf("\n"); 1357 break; 1358 case 'c': 1359 mly_printf(sc, "controller %s\n", tp); 1360 break; 1361 case '?': 1362 mly_printf(sc, "%s - %d\n", tp, me->code); 1363 break; 1364 default: /* probably a 'noisy' event being ignored */ 1365 break; 1366 } 1367 } 1368 1369 /******************************************************************************** 1370 * Perform periodic activities. 1371 */ 1372 static void 1373 mly_periodic(void *data) 1374 { 1375 struct mly_softc *sc = (struct mly_softc *)data; 1376 int bus, target; 1377 1378 debug_called(2); 1379 1380 /* 1381 * Scan devices. 1382 */ 1383 for (bus = 0; bus < sc->mly_cam_channels; bus++) { 1384 if (MLY_BUS_IS_VALID(sc, bus)) { 1385 for (target = 0; target < MLY_MAX_TARGETS; target++) { 1386 1387 /* ignore the controller in this scan */ 1388 if (target == sc->mly_controllerparam->initiator_id) 1389 continue; 1390 1391 /* perform device rescan? */ 1392 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_RESCAN) 1393 mly_rescan_btl(sc, bus, target); 1394 } 1395 } 1396 } 1397 1398 /* check for controller events */ 1399 mly_check_event(sc); 1400 1401 /* reschedule ourselves */ 1402 callout_reset(&sc->mly_periodic, MLY_PERIODIC_INTERVAL * hz, mly_periodic, sc); 1403 } 1404 1405 /******************************************************************************** 1406 ******************************************************************************** 1407 Command Processing 1408 ******************************************************************************** 1409 ********************************************************************************/ 1410 1411 /******************************************************************************** 1412 * Run a command and wait for it to complete. 1413 * 1414 */ 1415 static int 1416 mly_immediate_command(struct mly_command *mc) 1417 { 1418 struct mly_softc *sc = mc->mc_sc; 1419 int error; 1420 1421 debug_called(1); 1422 1423 /* spinning at splcam is ugly, but we're only used during controller init */ 1424 crit_enter(); 1425 if ((error = mly_start(mc))) { 1426 crit_exit(); 1427 return(error); 1428 } 1429 1430 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) { 1431 /* sleep on the command */ 1432 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) { 1433 tsleep(mc, 0, "mlywait", 0); 1434 } 1435 } else { 1436 /* spin and collect status while we do */ 1437 while(!(mc->mc_flags & MLY_CMD_COMPLETE)) { 1438 mly_done(mc->mc_sc); 1439 } 1440 } 1441 crit_exit(); 1442 return(0); 1443 } 1444 1445 /******************************************************************************** 1446 * Deliver a command to the controller. 1447 * 1448 * XXX it would be good to just queue commands that we can't submit immediately 1449 * and send them later, but we probably want a wrapper for that so that 1450 * we don't hang on a failed submission for an immediate command. 1451 */ 1452 static int 1453 mly_start(struct mly_command *mc) 1454 { 1455 struct mly_softc *sc = mc->mc_sc; 1456 union mly_command_packet *pkt; 1457 1458 debug_called(2); 1459 1460 /* 1461 * Set the command up for delivery to the controller. 1462 */ 1463 mly_map_command(mc); 1464 mc->mc_packet->generic.command_id = mc->mc_slot; 1465 1466 #ifdef MLY_DEBUG 1467 mc->mc_timestamp = time_uptime; 1468 #endif 1469 1470 crit_enter(); 1471 1472 /* 1473 * Do we have to use the hardware mailbox? 1474 */ 1475 if (!(sc->mly_state & MLY_STATE_MMBOX_ACTIVE)) { 1476 /* 1477 * Check to see if the controller is ready for us. 1478 */ 1479 if (MLY_IDBR_TRUE(sc, MLY_HM_CMDSENT)) { 1480 crit_exit(); 1481 return(EBUSY); 1482 } 1483 mc->mc_flags |= MLY_CMD_BUSY; 1484 1485 /* 1486 * It's ready, send the command. 1487 */ 1488 MLY_SET_MBOX(sc, sc->mly_command_mailbox, &mc->mc_packetphys); 1489 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_CMDSENT); 1490 1491 } else { /* use memory-mailbox mode */ 1492 1493 pkt = &sc->mly_mmbox->mmm_command[sc->mly_mmbox_command_index]; 1494 1495 /* check to see if the next index is free yet */ 1496 if (pkt->mmbox.flag != 0) { 1497 crit_exit(); 1498 return(EBUSY); 1499 } 1500 mc->mc_flags |= MLY_CMD_BUSY; 1501 1502 /* copy in new command */ 1503 bcopy(mc->mc_packet->mmbox.data, pkt->mmbox.data, sizeof(pkt->mmbox.data)); 1504 /* barrier to ensure completion of previous write before we write the flag */ 1505 bus_space_barrier(sc->mly_btag, sc->mly_bhandle, 0, 0, 1506 BUS_SPACE_BARRIER_WRITE); 1507 /* copy flag last */ 1508 pkt->mmbox.flag = mc->mc_packet->mmbox.flag; 1509 /* barrier to ensure completion of previous write before we notify the controller */ 1510 bus_space_barrier(sc->mly_btag, sc->mly_bhandle, 0, 0, 1511 BUS_SPACE_BARRIER_WRITE); 1512 1513 /* signal controller, update index */ 1514 MLY_SET_REG(sc, sc->mly_idbr, MLY_AM_CMDSENT); 1515 sc->mly_mmbox_command_index = (sc->mly_mmbox_command_index + 1) % MLY_MMBOX_COMMANDS; 1516 } 1517 1518 mly_enqueue_busy(mc); 1519 crit_exit(); 1520 return(0); 1521 } 1522 1523 /******************************************************************************** 1524 * Pick up command status from the controller, schedule a completion event 1525 */ 1526 static void 1527 mly_done(struct mly_softc *sc) 1528 { 1529 struct mly_command *mc; 1530 union mly_status_packet *sp; 1531 u_int16_t slot; 1532 int worked; 1533 1534 crit_enter(); 1535 worked = 0; 1536 1537 /* pick up hardware-mailbox commands */ 1538 if (MLY_ODBR_TRUE(sc, MLY_HM_STSREADY)) { 1539 slot = MLY_GET_REG2(sc, sc->mly_status_mailbox); 1540 if (slot < MLY_SLOT_MAX) { 1541 mc = &sc->mly_command[slot - MLY_SLOT_START]; 1542 mc->mc_status = MLY_GET_REG(sc, sc->mly_status_mailbox + 2); 1543 mc->mc_sense = MLY_GET_REG(sc, sc->mly_status_mailbox + 3); 1544 mc->mc_resid = MLY_GET_REG4(sc, sc->mly_status_mailbox + 4); 1545 mly_remove_busy(mc); 1546 mc->mc_flags &= ~MLY_CMD_BUSY; 1547 mly_enqueue_complete(mc); 1548 worked = 1; 1549 } else { 1550 /* slot 0xffff may mean "extremely bogus command" */ 1551 mly_printf(sc, "got HM completion for illegal slot %u\n", slot); 1552 } 1553 /* unconditionally acknowledge status */ 1554 MLY_SET_REG(sc, sc->mly_odbr, MLY_HM_STSREADY); 1555 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 1556 } 1557 1558 /* pick up memory-mailbox commands */ 1559 if (MLY_ODBR_TRUE(sc, MLY_AM_STSREADY)) { 1560 for (;;) { 1561 sp = &sc->mly_mmbox->mmm_status[sc->mly_mmbox_status_index]; 1562 1563 /* check for more status */ 1564 if (sp->mmbox.flag == 0) 1565 break; 1566 1567 /* get slot number */ 1568 slot = sp->status.command_id; 1569 if (slot < MLY_SLOT_MAX) { 1570 mc = &sc->mly_command[slot - MLY_SLOT_START]; 1571 mc->mc_status = sp->status.status; 1572 mc->mc_sense = sp->status.sense_length; 1573 mc->mc_resid = sp->status.residue; 1574 mly_remove_busy(mc); 1575 mc->mc_flags &= ~MLY_CMD_BUSY; 1576 mly_enqueue_complete(mc); 1577 worked = 1; 1578 } else { 1579 /* slot 0xffff may mean "extremely bogus command" */ 1580 mly_printf(sc, "got AM completion for illegal slot %u at %d\n", 1581 slot, sc->mly_mmbox_status_index); 1582 } 1583 1584 /* clear and move to next index */ 1585 sp->mmbox.flag = 0; 1586 sc->mly_mmbox_status_index = (sc->mly_mmbox_status_index + 1) % MLY_MMBOX_STATUS; 1587 } 1588 /* acknowledge that we have collected status value(s) */ 1589 MLY_SET_REG(sc, sc->mly_odbr, MLY_AM_STSREADY); 1590 } 1591 1592 crit_exit(); 1593 if (worked) { 1594 if (sc->mly_state & MLY_STATE_INTERRUPTS_ON) 1595 taskqueue_enqueue(taskqueue_swi, &sc->mly_task_complete); 1596 else 1597 mly_complete(sc, 0); 1598 } 1599 } 1600 1601 /******************************************************************************** 1602 * Process completed commands 1603 */ 1604 static void 1605 mly_complete(void *context, int pending) 1606 { 1607 struct mly_softc *sc = (struct mly_softc *)context; 1608 struct mly_command *mc; 1609 void (* mc_complete)(struct mly_command *mc); 1610 1611 1612 debug_called(2); 1613 1614 /* 1615 * Spin pulling commands off the completed queue and processing them. 1616 */ 1617 while ((mc = mly_dequeue_complete(sc)) != NULL) { 1618 1619 /* 1620 * Free controller resources, mark command complete. 1621 * 1622 * Note that as soon as we mark the command complete, it may be freed 1623 * out from under us, so we need to save the mc_complete field in 1624 * order to later avoid dereferencing mc. (We would not expect to 1625 * have a polling/sleeping consumer with mc_complete != NULL). 1626 */ 1627 mly_unmap_command(mc); 1628 mc_complete = mc->mc_complete; 1629 mc->mc_flags |= MLY_CMD_COMPLETE; 1630 1631 /* 1632 * Call completion handler or wake up sleeping consumer. 1633 */ 1634 if (mc_complete != NULL) { 1635 mc_complete(mc); 1636 } else { 1637 wakeup(mc); 1638 } 1639 } 1640 1641 /* 1642 * XXX if we are deferring commands due to controller-busy status, we should 1643 * retry submitting them here. 1644 */ 1645 } 1646 1647 /******************************************************************************** 1648 ******************************************************************************** 1649 Command Buffer Management 1650 ******************************************************************************** 1651 ********************************************************************************/ 1652 1653 /******************************************************************************** 1654 * Allocate a command. 1655 */ 1656 static int 1657 mly_alloc_command(struct mly_softc *sc, struct mly_command **mcp) 1658 { 1659 struct mly_command *mc; 1660 1661 debug_called(3); 1662 1663 if ((mc = mly_dequeue_free(sc)) == NULL) 1664 return(ENOMEM); 1665 1666 *mcp = mc; 1667 return(0); 1668 } 1669 1670 /******************************************************************************** 1671 * Release a command back to the freelist. 1672 */ 1673 static void 1674 mly_release_command(struct mly_command *mc) 1675 { 1676 debug_called(3); 1677 1678 /* 1679 * Fill in parts of the command that may cause confusion if 1680 * a consumer doesn't when we are later allocated. 1681 */ 1682 mc->mc_data = NULL; 1683 mc->mc_flags = 0; 1684 mc->mc_complete = NULL; 1685 mc->mc_private = NULL; 1686 1687 /* 1688 * By default, we set up to overwrite the command packet with 1689 * sense information. 1690 */ 1691 mc->mc_packet->generic.sense_buffer_address = mc->mc_packetphys; 1692 mc->mc_packet->generic.maximum_sense_size = sizeof(union mly_command_packet); 1693 1694 mly_enqueue_free(mc); 1695 } 1696 1697 /******************************************************************************** 1698 * Map helper for command allocation. 1699 */ 1700 static void 1701 mly_alloc_commands_map(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1702 { 1703 struct mly_softc *sc = (struct mly_softc *)arg; 1704 1705 debug_called(1); 1706 1707 sc->mly_packetphys = segs[0].ds_addr; 1708 } 1709 1710 /******************************************************************************** 1711 * Allocate and initialise command and packet structures. 1712 * 1713 * If the controller supports fewer than MLY_MAX_COMMANDS commands, limit our 1714 * allocation to that number. If we don't yet know how many commands the 1715 * controller supports, allocate a very small set (suitable for initialisation 1716 * purposes only). 1717 */ 1718 static int 1719 mly_alloc_commands(struct mly_softc *sc) 1720 { 1721 struct mly_command *mc; 1722 int i, ncmd; 1723 1724 if (sc->mly_controllerinfo == NULL) { 1725 ncmd = 4; 1726 } else { 1727 ncmd = min(MLY_MAX_COMMANDS, sc->mly_controllerinfo->maximum_parallel_commands); 1728 } 1729 1730 /* 1731 * Allocate enough space for all the command packets in one chunk and 1732 * map them permanently into controller-visible space. 1733 */ 1734 if (bus_dmamem_alloc(sc->mly_packet_dmat, (void **)&sc->mly_packet, 1735 BUS_DMA_NOWAIT, &sc->mly_packetmap)) { 1736 return(ENOMEM); 1737 } 1738 if (bus_dmamap_load(sc->mly_packet_dmat, sc->mly_packetmap, sc->mly_packet, 1739 ncmd * sizeof(union mly_command_packet), 1740 mly_alloc_commands_map, sc, BUS_DMA_NOWAIT) != 0) 1741 return (ENOMEM); 1742 1743 for (i = 0; i < ncmd; i++) { 1744 mc = &sc->mly_command[i]; 1745 bzero(mc, sizeof(*mc)); 1746 mc->mc_sc = sc; 1747 mc->mc_slot = MLY_SLOT_START + i; 1748 mc->mc_packet = sc->mly_packet + i; 1749 mc->mc_packetphys = sc->mly_packetphys + (i * sizeof(union mly_command_packet)); 1750 if (!bus_dmamap_create(sc->mly_buffer_dmat, 0, &mc->mc_datamap)) 1751 mly_release_command(mc); 1752 } 1753 return(0); 1754 } 1755 1756 /******************************************************************************** 1757 * Free all the storage held by commands. 1758 * 1759 * Must be called with all commands on the free list. 1760 */ 1761 static void 1762 mly_release_commands(struct mly_softc *sc) 1763 { 1764 struct mly_command *mc; 1765 1766 /* throw away command buffer DMA maps */ 1767 while (mly_alloc_command(sc, &mc) == 0) 1768 bus_dmamap_destroy(sc->mly_buffer_dmat, mc->mc_datamap); 1769 1770 /* release the packet storage */ 1771 if (sc->mly_packet != NULL) { 1772 bus_dmamap_unload(sc->mly_packet_dmat, sc->mly_packetmap); 1773 bus_dmamem_free(sc->mly_packet_dmat, sc->mly_packet, sc->mly_packetmap); 1774 sc->mly_packet = NULL; 1775 } 1776 } 1777 1778 1779 /******************************************************************************** 1780 * Command-mapping helper function - populate this command's s/g table 1781 * with the s/g entries for its data. 1782 */ 1783 static void 1784 mly_map_command_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1785 { 1786 struct mly_command *mc = (struct mly_command *)arg; 1787 struct mly_softc *sc = mc->mc_sc; 1788 struct mly_command_generic *gen = &(mc->mc_packet->generic); 1789 struct mly_sg_entry *sg; 1790 int i, tabofs; 1791 1792 debug_called(2); 1793 1794 /* can we use the transfer structure directly? */ 1795 if (nseg <= 2) { 1796 sg = &gen->transfer.direct.sg[0]; 1797 gen->command_control.extended_sg_table = 0; 1798 } else { 1799 tabofs = ((mc->mc_slot - MLY_SLOT_START) * MLY_MAX_SGENTRIES); 1800 sg = sc->mly_sg_table + tabofs; 1801 gen->transfer.indirect.entries[0] = nseg; 1802 gen->transfer.indirect.table_physaddr[0] = sc->mly_sg_busaddr + (tabofs * sizeof(struct mly_sg_entry)); 1803 gen->command_control.extended_sg_table = 1; 1804 } 1805 1806 /* copy the s/g table */ 1807 for (i = 0; i < nseg; i++) { 1808 sg[i].physaddr = segs[i].ds_addr; 1809 sg[i].length = segs[i].ds_len; 1810 } 1811 1812 } 1813 1814 #if 0 1815 /******************************************************************************** 1816 * Command-mapping helper function - save the cdb's physical address. 1817 * 1818 * We don't support 'large' SCSI commands at this time, so this is unused. 1819 */ 1820 static void 1821 mly_map_command_cdb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1822 { 1823 struct mly_command *mc = (struct mly_command *)arg; 1824 1825 debug_called(2); 1826 1827 /* XXX can we safely assume that a CDB will never cross a page boundary? */ 1828 if ((segs[0].ds_addr % PAGE_SIZE) > 1829 ((segs[0].ds_addr + mc->mc_packet->scsi_large.cdb_length) % PAGE_SIZE)) 1830 panic("cdb crosses page boundary"); 1831 1832 /* fix up fields in the command packet */ 1833 mc->mc_packet->scsi_large.cdb_physaddr = segs[0].ds_addr; 1834 } 1835 #endif 1836 1837 /******************************************************************************** 1838 * Map a command into controller-visible space 1839 */ 1840 static void 1841 mly_map_command(struct mly_command *mc) 1842 { 1843 struct mly_softc *sc = mc->mc_sc; 1844 1845 debug_called(2); 1846 1847 /* don't map more than once */ 1848 if (mc->mc_flags & MLY_CMD_MAPPED) 1849 return; 1850 1851 /* does the command have a data buffer? */ 1852 if (mc->mc_data != NULL) { 1853 bus_dmamap_load(sc->mly_buffer_dmat, mc->mc_datamap, mc->mc_data, mc->mc_length, 1854 mly_map_command_sg, mc, 0); 1855 1856 if (mc->mc_flags & MLY_CMD_DATAIN) 1857 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREREAD); 1858 if (mc->mc_flags & MLY_CMD_DATAOUT) 1859 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_PREWRITE); 1860 } 1861 mc->mc_flags |= MLY_CMD_MAPPED; 1862 } 1863 1864 /******************************************************************************** 1865 * Unmap a command from controller-visible space 1866 */ 1867 static void 1868 mly_unmap_command(struct mly_command *mc) 1869 { 1870 struct mly_softc *sc = mc->mc_sc; 1871 1872 debug_called(2); 1873 1874 if (!(mc->mc_flags & MLY_CMD_MAPPED)) 1875 return; 1876 1877 /* does the command have a data buffer? */ 1878 if (mc->mc_data != NULL) { 1879 if (mc->mc_flags & MLY_CMD_DATAIN) 1880 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTREAD); 1881 if (mc->mc_flags & MLY_CMD_DATAOUT) 1882 bus_dmamap_sync(sc->mly_buffer_dmat, mc->mc_datamap, BUS_DMASYNC_POSTWRITE); 1883 1884 bus_dmamap_unload(sc->mly_buffer_dmat, mc->mc_datamap); 1885 } 1886 mc->mc_flags &= ~MLY_CMD_MAPPED; 1887 } 1888 1889 1890 /******************************************************************************** 1891 ******************************************************************************** 1892 CAM interface 1893 ******************************************************************************** 1894 ********************************************************************************/ 1895 1896 /******************************************************************************** 1897 * Attach the physical and virtual SCSI busses to CAM. 1898 * 1899 * Physical bus numbering starts from 0, virtual bus numbering from one greater 1900 * than the highest physical bus. Physical busses are only registered if 1901 * the kernel environment variable "hw.mly.register_physical_channels" is set. 1902 * 1903 * When we refer to a "bus", we are referring to the bus number registered with 1904 * the SIM, wheras a "channel" is a channel number given to the adapter. In order 1905 * to keep things simple, we map these 1:1, so "bus" and "channel" may be used 1906 * interchangeably. 1907 */ 1908 static int 1909 mly_cam_attach(struct mly_softc *sc) 1910 { 1911 struct cam_devq *devq; 1912 int chn, i; 1913 1914 debug_called(1); 1915 1916 /* 1917 * Allocate a devq for all our channels combined. 1918 */ 1919 if ((devq = cam_simq_alloc(sc->mly_controllerinfo->maximum_parallel_commands)) == NULL) { 1920 mly_printf(sc, "can't allocate CAM SIM queue\n"); 1921 return(ENOMEM); 1922 } 1923 1924 /* 1925 * If physical channel registration has been requested, register these first. 1926 * Note that we enable tagged command queueing for physical channels. 1927 */ 1928 if (ktestenv("hw.mly.register_physical_channels")) { 1929 chn = 0; 1930 for (i = 0; i < sc->mly_controllerinfo->physical_channels_present; i++, chn++) { 1931 1932 if ((sc->mly_cam_sim[chn] = cam_sim_alloc(mly_cam_action, mly_cam_poll, "mly", sc, 1933 device_get_unit(sc->mly_dev), 1934 &sim_mplock, 1935 sc->mly_controllerinfo->maximum_parallel_commands, 1936 1, devq)) == NULL) { 1937 return(ENOMEM); 1938 } 1939 if (xpt_bus_register(sc->mly_cam_sim[chn], chn)) { 1940 mly_printf(sc, "CAM XPT physical channel registration failed\n"); 1941 return(ENXIO); 1942 } 1943 debug(1, "registered physical channel %d", chn); 1944 } 1945 } 1946 1947 /* 1948 * Register our virtual channels, with bus numbers matching channel numbers. 1949 */ 1950 chn = sc->mly_controllerinfo->physical_channels_present; 1951 for (i = 0; i < sc->mly_controllerinfo->virtual_channels_present; i++, chn++) { 1952 if ((sc->mly_cam_sim[chn] = cam_sim_alloc(mly_cam_action, mly_cam_poll, "mly", sc, 1953 device_get_unit(sc->mly_dev), 1954 &sim_mplock, 1955 sc->mly_controllerinfo->maximum_parallel_commands, 1956 0, devq)) == NULL) { 1957 return(ENOMEM); 1958 } 1959 if (xpt_bus_register(sc->mly_cam_sim[chn], chn)) { 1960 mly_printf(sc, "CAM XPT virtual channel registration failed\n"); 1961 return(ENXIO); 1962 } 1963 debug(1, "registered virtual channel %d", chn); 1964 } 1965 1966 /* 1967 * This is the total number of channels that (might have been) registered with 1968 * CAM. Some may not have been; check the mly_cam_sim array to be certain. 1969 */ 1970 sc->mly_cam_channels = sc->mly_controllerinfo->physical_channels_present + 1971 sc->mly_controllerinfo->virtual_channels_present; 1972 1973 return(0); 1974 } 1975 1976 /******************************************************************************** 1977 * Detach from CAM 1978 */ 1979 static void 1980 mly_cam_detach(struct mly_softc *sc) 1981 { 1982 int i; 1983 1984 debug_called(1); 1985 1986 for (i = 0; i < sc->mly_cam_channels; i++) { 1987 if (sc->mly_cam_sim[i] != NULL) { 1988 xpt_bus_deregister(cam_sim_path(sc->mly_cam_sim[i])); 1989 cam_sim_free(sc->mly_cam_sim[i]); 1990 } 1991 } 1992 if (sc->mly_cam_devq != NULL) 1993 cam_simq_release(sc->mly_cam_devq); 1994 } 1995 1996 /************************************************************************ 1997 * Rescan a device. 1998 */ 1999 static void 2000 mly_cam_rescan_btl(struct mly_softc *sc, int bus, int target) 2001 { 2002 union ccb *ccb; 2003 2004 debug_called(1); 2005 2006 if ((ccb = xpt_alloc_ccb()) == NULL) { 2007 mly_printf(sc, "rescan failed (can't allocate CCB)\n"); 2008 return; 2009 } 2010 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 2011 cam_sim_path(sc->mly_cam_sim[bus]), target, 0) != CAM_REQ_CMP) { 2012 mly_printf(sc, "rescan failed (can't create path)\n"); 2013 xpt_free_ccb(ccb); 2014 return; 2015 } 2016 2017 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 5/*priority (low)*/); 2018 ccb->ccb_h.func_code = XPT_SCAN_LUN; 2019 ccb->ccb_h.cbfcnp = mly_cam_rescan_callback; 2020 ccb->crcn.flags = CAM_FLAG_NONE; 2021 debug(1, "rescan target %d:%d", bus, target); 2022 xpt_action(ccb); 2023 } 2024 2025 static void 2026 mly_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb) 2027 { 2028 xpt_free_ccb(ccb); 2029 } 2030 2031 /******************************************************************************** 2032 * Handle an action requested by CAM 2033 */ 2034 static void 2035 mly_cam_action(struct cam_sim *sim, union ccb *ccb) 2036 { 2037 struct mly_softc *sc = cam_sim_softc(sim); 2038 2039 debug_called(2); 2040 2041 switch (ccb->ccb_h.func_code) { 2042 2043 /* perform SCSI I/O */ 2044 case XPT_SCSI_IO: 2045 if (!mly_cam_action_io(sim, (struct ccb_scsiio *)&ccb->csio)) 2046 return; 2047 break; 2048 2049 /* perform geometry calculations */ 2050 case XPT_CALC_GEOMETRY: 2051 { 2052 struct ccb_calc_geometry *ccg = &ccb->ccg; 2053 u_int32_t secs_per_cylinder; 2054 2055 debug(2, "XPT_CALC_GEOMETRY %d:%d:%d", cam_sim_bus(sim), ccb->ccb_h.target_id, ccb->ccb_h.target_lun); 2056 2057 if (sc->mly_controllerparam->bios_geometry == MLY_BIOSGEOM_8G) { 2058 ccg->heads = 255; 2059 ccg->secs_per_track = 63; 2060 } else { /* MLY_BIOSGEOM_2G */ 2061 ccg->heads = 128; 2062 ccg->secs_per_track = 32; 2063 } 2064 secs_per_cylinder = ccg->heads * ccg->secs_per_track; 2065 ccg->cylinders = ccg->volume_size / secs_per_cylinder; 2066 ccb->ccb_h.status = CAM_REQ_CMP; 2067 break; 2068 } 2069 2070 /* handle path attribute inquiry */ 2071 case XPT_PATH_INQ: 2072 { 2073 struct ccb_pathinq *cpi = &ccb->cpi; 2074 2075 debug(2, "XPT_PATH_INQ %d:%d:%d", cam_sim_bus(sim), ccb->ccb_h.target_id, ccb->ccb_h.target_lun); 2076 2077 cpi->version_num = 1; 2078 cpi->hba_inquiry = PI_TAG_ABLE; /* XXX extra flags for physical channels? */ 2079 cpi->target_sprt = 0; 2080 cpi->hba_misc = 0; 2081 cpi->max_target = MLY_MAX_TARGETS - 1; 2082 cpi->max_lun = MLY_MAX_LUNS - 1; 2083 cpi->initiator_id = sc->mly_controllerparam->initiator_id; 2084 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 2085 strncpy(cpi->hba_vid, "FreeBSD", HBA_IDLEN); 2086 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 2087 cpi->unit_number = cam_sim_unit(sim); 2088 cpi->bus_id = cam_sim_bus(sim); 2089 cpi->base_transfer_speed = 132 * 1024; /* XXX what to set this to? */ 2090 cpi->transport = XPORT_SPI; 2091 cpi->transport_version = 2; 2092 cpi->protocol = PROTO_SCSI; 2093 cpi->protocol_version = SCSI_REV_2; 2094 ccb->ccb_h.status = CAM_REQ_CMP; 2095 break; 2096 } 2097 2098 case XPT_GET_TRAN_SETTINGS: 2099 { 2100 struct ccb_trans_settings *cts = &ccb->cts; 2101 int bus, target; 2102 struct ccb_trans_settings_scsi *scsi = &cts->proto_specific.scsi; 2103 struct ccb_trans_settings_spi *spi = &cts->xport_specific.spi; 2104 2105 cts->protocol = PROTO_SCSI; 2106 cts->protocol_version = SCSI_REV_2; 2107 cts->transport = XPORT_SPI; 2108 cts->transport_version = 2; 2109 2110 scsi->flags = 0; 2111 scsi->valid = 0; 2112 spi->flags = 0; 2113 spi->valid = 0; 2114 2115 bus = cam_sim_bus(sim); 2116 target = cts->ccb_h.target_id; 2117 debug(2, "XPT_GET_TRAN_SETTINGS %d:%d", bus, target); 2118 /* logical device? */ 2119 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_LOGICAL) { 2120 /* nothing special for these */ 2121 /* physical device? */ 2122 } else if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_PHYSICAL) { 2123 /* allow CAM to try tagged transactions */ 2124 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB; 2125 scsi->valid |= CTS_SCSI_VALID_TQ; 2126 2127 /* convert speed (MHz) to usec */ 2128 if (sc->mly_btl[bus][target].mb_speed == 0) { 2129 spi->sync_period = 1000000 / 5; 2130 } else { 2131 spi->sync_period = 1000000 / sc->mly_btl[bus][target].mb_speed; 2132 } 2133 2134 /* convert bus width to CAM internal encoding */ 2135 switch (sc->mly_btl[bus][target].mb_width) { 2136 case 32: 2137 spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT; 2138 break; 2139 case 16: 2140 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 2141 break; 2142 case 8: 2143 default: 2144 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 2145 break; 2146 } 2147 spi->valid |= CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_BUS_WIDTH; 2148 2149 /* not a device, bail out */ 2150 } else { 2151 cts->ccb_h.status = CAM_REQ_CMP_ERR; 2152 break; 2153 } 2154 2155 /* disconnect always OK */ 2156 spi->flags |= CTS_SPI_FLAGS_DISC_ENB; 2157 spi->valid |= CTS_SPI_VALID_DISC; 2158 2159 cts->ccb_h.status = CAM_REQ_CMP; 2160 break; 2161 } 2162 2163 default: /* we can't do this */ 2164 debug(2, "unsupported func_code = 0x%x", ccb->ccb_h.func_code); 2165 ccb->ccb_h.status = CAM_REQ_INVALID; 2166 break; 2167 } 2168 2169 xpt_done(ccb); 2170 } 2171 2172 /******************************************************************************** 2173 * Handle an I/O operation requested by CAM 2174 */ 2175 static int 2176 mly_cam_action_io(struct cam_sim *sim, struct ccb_scsiio *csio) 2177 { 2178 struct mly_softc *sc = cam_sim_softc(sim); 2179 struct mly_command *mc; 2180 struct mly_command_scsi_small *ss; 2181 int bus, target; 2182 int error; 2183 2184 bus = cam_sim_bus(sim); 2185 target = csio->ccb_h.target_id; 2186 2187 debug(2, "XPT_SCSI_IO %d:%d:%d", bus, target, csio->ccb_h.target_lun); 2188 2189 /* validate bus number */ 2190 if (!MLY_BUS_IS_VALID(sc, bus)) { 2191 debug(0, " invalid bus %d", bus); 2192 csio->ccb_h.status = CAM_REQ_CMP_ERR; 2193 } 2194 2195 /* check for I/O attempt to a protected device */ 2196 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_PROTECTED) { 2197 debug(2, " device protected"); 2198 csio->ccb_h.status = CAM_REQ_CMP_ERR; 2199 } 2200 2201 /* check for I/O attempt to nonexistent device */ 2202 if (!(sc->mly_btl[bus][target].mb_flags & (MLY_BTL_LOGICAL | MLY_BTL_PHYSICAL))) { 2203 debug(2, " device %d:%d does not exist", bus, target); 2204 csio->ccb_h.status = CAM_REQ_CMP_ERR; 2205 } 2206 2207 /* XXX increase if/when we support large SCSI commands */ 2208 if (csio->cdb_len > MLY_CMD_SCSI_SMALL_CDB) { 2209 debug(0, " command too large (%d > %d)", csio->cdb_len, MLY_CMD_SCSI_SMALL_CDB); 2210 csio->ccb_h.status = CAM_REQ_CMP_ERR; 2211 } 2212 2213 /* check that the CDB pointer is not to a physical address */ 2214 if ((csio->ccb_h.flags & CAM_CDB_POINTER) && (csio->ccb_h.flags & CAM_CDB_PHYS)) { 2215 debug(0, " CDB pointer is to physical address"); 2216 csio->ccb_h.status = CAM_REQ_CMP_ERR; 2217 } 2218 2219 /* if there is data transfer, it must be to/from a virtual address */ 2220 if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) { 2221 if (csio->ccb_h.flags & CAM_DATA_PHYS) { /* we can't map it */ 2222 debug(0, " data pointer is to physical address"); 2223 csio->ccb_h.status = CAM_REQ_CMP_ERR; 2224 } 2225 if (csio->ccb_h.flags & CAM_SCATTER_VALID) { /* we want to do the s/g setup */ 2226 debug(0, " data has premature s/g setup"); 2227 csio->ccb_h.status = CAM_REQ_CMP_ERR; 2228 } 2229 } 2230 2231 /* abandon aborted ccbs or those that have failed validation */ 2232 if ((csio->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_INPROG) { 2233 debug(2, "abandoning CCB due to abort/validation failure"); 2234 return(EINVAL); 2235 } 2236 2237 /* 2238 * Get a command, or push the ccb back to CAM and freeze the queue. 2239 */ 2240 if ((error = mly_alloc_command(sc, &mc))) { 2241 crit_enter(); 2242 xpt_freeze_simq(sim, 1); 2243 csio->ccb_h.status |= CAM_REQUEUE_REQ; 2244 sc->mly_qfrzn_cnt++; 2245 crit_exit(); 2246 return(error); 2247 } 2248 2249 /* build the command */ 2250 mc->mc_data = csio->data_ptr; 2251 mc->mc_length = csio->dxfer_len; 2252 mc->mc_complete = mly_cam_complete; 2253 mc->mc_private = csio; 2254 2255 /* save the bus number in the ccb for later recovery XXX should be a better way */ 2256 csio->ccb_h.sim_priv.entries[0].field = bus; 2257 2258 /* build the packet for the controller */ 2259 ss = &mc->mc_packet->scsi_small; 2260 ss->opcode = MDACMD_SCSI; 2261 if (csio->ccb_h.flags & CAM_DIS_DISCONNECT) 2262 ss->command_control.disable_disconnect = 1; 2263 if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT) 2264 ss->command_control.data_direction = MLY_CCB_WRITE; 2265 ss->data_size = csio->dxfer_len; 2266 ss->addr.phys.lun = csio->ccb_h.target_lun; 2267 ss->addr.phys.target = csio->ccb_h.target_id; 2268 ss->addr.phys.channel = bus; 2269 if (csio->ccb_h.timeout < (60 * 1000)) { 2270 ss->timeout.value = csio->ccb_h.timeout / 1000; 2271 ss->timeout.scale = MLY_TIMEOUT_SECONDS; 2272 } else if (csio->ccb_h.timeout < (60 * 60 * 1000)) { 2273 ss->timeout.value = csio->ccb_h.timeout / (60 * 1000); 2274 ss->timeout.scale = MLY_TIMEOUT_MINUTES; 2275 } else { 2276 ss->timeout.value = csio->ccb_h.timeout / (60 * 60 * 1000); /* overflow? */ 2277 ss->timeout.scale = MLY_TIMEOUT_HOURS; 2278 } 2279 ss->maximum_sense_size = csio->sense_len; 2280 ss->cdb_length = csio->cdb_len; 2281 if (csio->ccb_h.flags & CAM_CDB_POINTER) { 2282 bcopy(csio->cdb_io.cdb_ptr, ss->cdb, csio->cdb_len); 2283 } else { 2284 bcopy(csio->cdb_io.cdb_bytes, ss->cdb, csio->cdb_len); 2285 } 2286 2287 /* give the command to the controller */ 2288 if ((error = mly_start(mc))) { 2289 crit_enter(); 2290 xpt_freeze_simq(sim, 1); 2291 csio->ccb_h.status |= CAM_REQUEUE_REQ; 2292 sc->mly_qfrzn_cnt++; 2293 crit_exit(); 2294 return(error); 2295 } 2296 2297 return(0); 2298 } 2299 2300 /******************************************************************************** 2301 * Check for possibly-completed commands. 2302 */ 2303 static void 2304 mly_cam_poll(struct cam_sim *sim) 2305 { 2306 struct mly_softc *sc = cam_sim_softc(sim); 2307 2308 debug_called(2); 2309 2310 mly_done(sc); 2311 } 2312 2313 /******************************************************************************** 2314 * Handle completion of a command - pass results back through the CCB 2315 */ 2316 static void 2317 mly_cam_complete(struct mly_command *mc) 2318 { 2319 struct mly_softc *sc = mc->mc_sc; 2320 struct ccb_scsiio *csio = (struct ccb_scsiio *)mc->mc_private; 2321 struct scsi_inquiry_data *inq = (struct scsi_inquiry_data *)csio->data_ptr; 2322 struct mly_btl *btl; 2323 u_int8_t cmd; 2324 int bus, target; 2325 2326 debug_called(2); 2327 2328 csio->scsi_status = mc->mc_status; 2329 switch(mc->mc_status) { 2330 case SCSI_STATUS_OK: 2331 /* 2332 * In order to report logical device type and status, we overwrite 2333 * the result of the INQUIRY command to logical devices. 2334 */ 2335 bus = csio->ccb_h.sim_priv.entries[0].field; 2336 target = csio->ccb_h.target_id; 2337 /* XXX validate bus/target? */ 2338 if (sc->mly_btl[bus][target].mb_flags & MLY_BTL_LOGICAL) { 2339 if (csio->ccb_h.flags & CAM_CDB_POINTER) { 2340 cmd = *csio->cdb_io.cdb_ptr; 2341 } else { 2342 cmd = csio->cdb_io.cdb_bytes[0]; 2343 } 2344 if (cmd == INQUIRY) { 2345 btl = &sc->mly_btl[bus][target]; 2346 padstr(inq->vendor, mly_describe_code(mly_table_device_type, btl->mb_type), 8); 2347 padstr(inq->product, mly_describe_code(mly_table_device_state, btl->mb_state), 16); 2348 padstr(inq->revision, "MYLX", 4); 2349 } 2350 } 2351 2352 debug(2, "SCSI_STATUS_OK"); 2353 csio->ccb_h.status = CAM_REQ_CMP; 2354 break; 2355 2356 case SCSI_STATUS_CHECK_COND: 2357 debug(1, "SCSI_STATUS_CHECK_COND sense %d resid %d", mc->mc_sense, mc->mc_resid); 2358 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR; 2359 bzero(&csio->sense_data, SSD_FULL_SIZE); 2360 bcopy(mc->mc_packet, &csio->sense_data, mc->mc_sense); 2361 csio->sense_len = mc->mc_sense; 2362 csio->ccb_h.status |= CAM_AUTOSNS_VALID; 2363 csio->resid = mc->mc_resid; /* XXX this is a signed value... */ 2364 break; 2365 2366 case SCSI_STATUS_BUSY: 2367 debug(1, "SCSI_STATUS_BUSY"); 2368 csio->ccb_h.status = CAM_SCSI_BUSY; 2369 break; 2370 2371 default: 2372 debug(1, "unknown status 0x%x", csio->scsi_status); 2373 csio->ccb_h.status = CAM_REQ_CMP_ERR; 2374 break; 2375 } 2376 2377 crit_enter(); 2378 if (sc->mly_qfrzn_cnt) { 2379 csio->ccb_h.status |= CAM_RELEASE_SIMQ; 2380 sc->mly_qfrzn_cnt--; 2381 } 2382 crit_exit(); 2383 2384 xpt_done((union ccb *)csio); 2385 mly_release_command(mc); 2386 } 2387 2388 /******************************************************************************** 2389 * Find a peripheral attahed at (bus),(target) 2390 */ 2391 static struct cam_periph * 2392 mly_find_periph(struct mly_softc *sc, int bus, int target) 2393 { 2394 struct cam_periph *periph; 2395 struct cam_path *path; 2396 int status; 2397 2398 status = xpt_create_path(&path, NULL, cam_sim_path(sc->mly_cam_sim[bus]), target, 0); 2399 if (status == CAM_REQ_CMP) { 2400 periph = cam_periph_find(path, NULL); 2401 xpt_free_path(path); 2402 } else { 2403 periph = NULL; 2404 } 2405 return(periph); 2406 } 2407 2408 /******************************************************************************** 2409 * Name the device at (bus)(target) 2410 */ 2411 static int 2412 mly_name_device(struct mly_softc *sc, int bus, int target) 2413 { 2414 struct cam_periph *periph; 2415 2416 if ((periph = mly_find_periph(sc, bus, target)) != NULL) { 2417 ksprintf(sc->mly_btl[bus][target].mb_name, "%s%d", periph->periph_name, periph->unit_number); 2418 return(0); 2419 } 2420 sc->mly_btl[bus][target].mb_name[0] = 0; 2421 return(ENOENT); 2422 } 2423 2424 /******************************************************************************** 2425 ******************************************************************************** 2426 Hardware Control 2427 ******************************************************************************** 2428 ********************************************************************************/ 2429 2430 /******************************************************************************** 2431 * Handshake with the firmware while the card is being initialised. 2432 */ 2433 static int 2434 mly_fwhandshake(struct mly_softc *sc) 2435 { 2436 u_int8_t error, param0, param1; 2437 int spinup = 0; 2438 2439 debug_called(1); 2440 2441 /* set HM_STSACK and let the firmware initialise */ 2442 MLY_SET_REG(sc, sc->mly_idbr, MLY_HM_STSACK); 2443 DELAY(1000); /* too short? */ 2444 2445 /* if HM_STSACK is still true, the controller is initialising */ 2446 if (!MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) 2447 return(0); 2448 mly_printf(sc, "controller initialisation started\n"); 2449 2450 /* spin waiting for initialisation to finish, or for a message to be delivered */ 2451 while (MLY_IDBR_TRUE(sc, MLY_HM_STSACK)) { 2452 /* check for a message */ 2453 if (MLY_ERROR_VALID(sc)) { 2454 error = MLY_GET_REG(sc, sc->mly_error_status) & ~MLY_MSG_EMPTY; 2455 param0 = MLY_GET_REG(sc, sc->mly_command_mailbox); 2456 param1 = MLY_GET_REG(sc, sc->mly_command_mailbox + 1); 2457 2458 switch(error) { 2459 case MLY_MSG_SPINUP: 2460 if (!spinup) { 2461 mly_printf(sc, "drive spinup in progress\n"); 2462 spinup = 1; /* only print this once (should print drive being spun?) */ 2463 } 2464 break; 2465 case MLY_MSG_RACE_RECOVERY_FAIL: 2466 mly_printf(sc, "mirror race recovery failed, one or more drives offline\n"); 2467 break; 2468 case MLY_MSG_RACE_IN_PROGRESS: 2469 mly_printf(sc, "mirror race recovery in progress\n"); 2470 break; 2471 case MLY_MSG_RACE_ON_CRITICAL: 2472 mly_printf(sc, "mirror race recovery on a critical drive\n"); 2473 break; 2474 case MLY_MSG_PARITY_ERROR: 2475 mly_printf(sc, "FATAL MEMORY PARITY ERROR\n"); 2476 return(ENXIO); 2477 default: 2478 mly_printf(sc, "unknown initialisation code 0x%x\n", error); 2479 } 2480 } 2481 } 2482 return(0); 2483 } 2484 2485 /******************************************************************************** 2486 ******************************************************************************** 2487 Debugging and Diagnostics 2488 ******************************************************************************** 2489 ********************************************************************************/ 2490 2491 /******************************************************************************** 2492 * Print some information about the controller. 2493 */ 2494 static void 2495 mly_describe_controller(struct mly_softc *sc) 2496 { 2497 struct mly_ioctl_getcontrollerinfo *mi = sc->mly_controllerinfo; 2498 2499 mly_printf(sc, "%16s, %d channel%s, firmware %d.%02d-%d-%02d (%02d%02d%02d%02d), %dMB RAM\n", 2500 mi->controller_name, mi->physical_channels_present, (mi->physical_channels_present) > 1 ? "s" : "", 2501 mi->fw_major, mi->fw_minor, mi->fw_turn, mi->fw_build, /* XXX turn encoding? */ 2502 mi->fw_century, mi->fw_year, mi->fw_month, mi->fw_day, 2503 mi->memory_size); 2504 2505 if (bootverbose) { 2506 mly_printf(sc, "%s %s (%x), %dMHz %d-bit %.16s\n", 2507 mly_describe_code(mly_table_oemname, mi->oem_information), 2508 mly_describe_code(mly_table_controllertype, mi->controller_type), mi->controller_type, 2509 mi->interface_speed, mi->interface_width, mi->interface_name); 2510 mly_printf(sc, "%dMB %dMHz %d-bit %s%s%s, cache %dMB\n", 2511 mi->memory_size, mi->memory_speed, mi->memory_width, 2512 mly_describe_code(mly_table_memorytype, mi->memory_type), 2513 mi->memory_parity ? "+parity": "",mi->memory_ecc ? "+ECC": "", 2514 mi->cache_size); 2515 mly_printf(sc, "CPU: %s @ %dMHz\n", 2516 mly_describe_code(mly_table_cputype, mi->cpu[0].type), mi->cpu[0].speed); 2517 if (mi->l2cache_size != 0) 2518 mly_printf(sc, "%dKB L2 cache\n", mi->l2cache_size); 2519 if (mi->exmemory_size != 0) 2520 mly_printf(sc, "%dMB %dMHz %d-bit private %s%s%s\n", 2521 mi->exmemory_size, mi->exmemory_speed, mi->exmemory_width, 2522 mly_describe_code(mly_table_memorytype, mi->exmemory_type), 2523 mi->exmemory_parity ? "+parity": "",mi->exmemory_ecc ? "+ECC": ""); 2524 mly_printf(sc, "battery backup %s\n", mi->bbu_present ? "present" : "not installed"); 2525 mly_printf(sc, "maximum data transfer %d blocks, maximum sg entries/command %d\n", 2526 mi->maximum_block_count, mi->maximum_sg_entries); 2527 mly_printf(sc, "logical devices present/critical/offline %d/%d/%d\n", 2528 mi->logical_devices_present, mi->logical_devices_critical, mi->logical_devices_offline); 2529 mly_printf(sc, "physical devices present %d\n", 2530 mi->physical_devices_present); 2531 mly_printf(sc, "physical disks present/offline %d/%d\n", 2532 mi->physical_disks_present, mi->physical_disks_offline); 2533 mly_printf(sc, "%d physical channel%s, %d virtual channel%s of %d possible\n", 2534 mi->physical_channels_present, mi->physical_channels_present == 1 ? "" : "s", 2535 mi->virtual_channels_present, mi->virtual_channels_present == 1 ? "" : "s", 2536 mi->virtual_channels_possible); 2537 mly_printf(sc, "%d parallel commands supported\n", mi->maximum_parallel_commands); 2538 mly_printf(sc, "%dMB flash ROM, %d of %d maximum cycles\n", 2539 mi->flash_size, mi->flash_age, mi->flash_maximum_age); 2540 } 2541 } 2542 2543 #ifdef MLY_DEBUG 2544 /******************************************************************************** 2545 * Print some controller state 2546 */ 2547 static void 2548 mly_printstate(struct mly_softc *sc) 2549 { 2550 mly_printf(sc, "IDBR %02x ODBR %02x ERROR %02x (%x %x %x)\n", 2551 MLY_GET_REG(sc, sc->mly_idbr), 2552 MLY_GET_REG(sc, sc->mly_odbr), 2553 MLY_GET_REG(sc, sc->mly_error_status), 2554 sc->mly_idbr, 2555 sc->mly_odbr, 2556 sc->mly_error_status); 2557 mly_printf(sc, "IMASK %02x ISTATUS %02x\n", 2558 MLY_GET_REG(sc, sc->mly_interrupt_mask), 2559 MLY_GET_REG(sc, sc->mly_interrupt_status)); 2560 mly_printf(sc, "COMMAND %02x %02x %02x %02x %02x %02x %02x %02x\n", 2561 MLY_GET_REG(sc, sc->mly_command_mailbox), 2562 MLY_GET_REG(sc, sc->mly_command_mailbox + 1), 2563 MLY_GET_REG(sc, sc->mly_command_mailbox + 2), 2564 MLY_GET_REG(sc, sc->mly_command_mailbox + 3), 2565 MLY_GET_REG(sc, sc->mly_command_mailbox + 4), 2566 MLY_GET_REG(sc, sc->mly_command_mailbox + 5), 2567 MLY_GET_REG(sc, sc->mly_command_mailbox + 6), 2568 MLY_GET_REG(sc, sc->mly_command_mailbox + 7)); 2569 mly_printf(sc, "STATUS %02x %02x %02x %02x %02x %02x %02x %02x\n", 2570 MLY_GET_REG(sc, sc->mly_status_mailbox), 2571 MLY_GET_REG(sc, sc->mly_status_mailbox + 1), 2572 MLY_GET_REG(sc, sc->mly_status_mailbox + 2), 2573 MLY_GET_REG(sc, sc->mly_status_mailbox + 3), 2574 MLY_GET_REG(sc, sc->mly_status_mailbox + 4), 2575 MLY_GET_REG(sc, sc->mly_status_mailbox + 5), 2576 MLY_GET_REG(sc, sc->mly_status_mailbox + 6), 2577 MLY_GET_REG(sc, sc->mly_status_mailbox + 7)); 2578 mly_printf(sc, " %04x %08x\n", 2579 MLY_GET_REG2(sc, sc->mly_status_mailbox), 2580 MLY_GET_REG4(sc, sc->mly_status_mailbox + 4)); 2581 } 2582 2583 struct mly_softc *mly_softc0 = NULL; 2584 void 2585 mly_printstate0(void) 2586 { 2587 if (mly_softc0 != NULL) 2588 mly_printstate(mly_softc0); 2589 } 2590 2591 /******************************************************************************** 2592 * Print a command 2593 */ 2594 static void 2595 mly_print_command(struct mly_command *mc) 2596 { 2597 struct mly_softc *sc = mc->mc_sc; 2598 2599 mly_printf(sc, "COMMAND @ %p\n", mc); 2600 mly_printf(sc, " slot %d\n", mc->mc_slot); 2601 mly_printf(sc, " status 0x%x\n", mc->mc_status); 2602 mly_printf(sc, " sense len %d\n", mc->mc_sense); 2603 mly_printf(sc, " resid %d\n", mc->mc_resid); 2604 mly_printf(sc, " packet %p/0x%llx\n", mc->mc_packet, mc->mc_packetphys); 2605 if (mc->mc_packet != NULL) 2606 mly_print_packet(mc); 2607 mly_printf(sc, " data %p/%d\n", mc->mc_data, mc->mc_length); 2608 mly_printf(sc, " flags %b\n", mc->mc_flags, "\20\1busy\2complete\3slotted\4mapped\5datain\6dataout\n"); 2609 mly_printf(sc, " complete %p\n", mc->mc_complete); 2610 mly_printf(sc, " private %p\n", mc->mc_private); 2611 } 2612 2613 /******************************************************************************** 2614 * Print a command packet 2615 */ 2616 static void 2617 mly_print_packet(struct mly_command *mc) 2618 { 2619 struct mly_softc *sc = mc->mc_sc; 2620 struct mly_command_generic *ge = (struct mly_command_generic *)mc->mc_packet; 2621 struct mly_command_scsi_small *ss = (struct mly_command_scsi_small *)mc->mc_packet; 2622 struct mly_command_scsi_large *sl = (struct mly_command_scsi_large *)mc->mc_packet; 2623 struct mly_command_ioctl *io = (struct mly_command_ioctl *)mc->mc_packet; 2624 int transfer; 2625 char hexstr[HEX_NCPYLEN(MLY_CMD_SCSI_SMALL_CDB)]; 2626 2627 mly_printf(sc, " command_id %d\n", ge->command_id); 2628 mly_printf(sc, " opcode %d\n", ge->opcode); 2629 mly_printf(sc, " command_control fua %d dpo %d est %d dd %s nas %d ddis %d\n", 2630 ge->command_control.force_unit_access, 2631 ge->command_control.disable_page_out, 2632 ge->command_control.extended_sg_table, 2633 (ge->command_control.data_direction == MLY_CCB_WRITE) ? "WRITE" : "READ", 2634 ge->command_control.no_auto_sense, 2635 ge->command_control.disable_disconnect); 2636 mly_printf(sc, " data_size %d\n", ge->data_size); 2637 mly_printf(sc, " sense_buffer_address 0x%llx\n", ge->sense_buffer_address); 2638 mly_printf(sc, " lun %d\n", ge->addr.phys.lun); 2639 mly_printf(sc, " target %d\n", ge->addr.phys.target); 2640 mly_printf(sc, " channel %d\n", ge->addr.phys.channel); 2641 mly_printf(sc, " logical device %d\n", ge->addr.log.logdev); 2642 mly_printf(sc, " controller %d\n", ge->addr.phys.controller); 2643 mly_printf(sc, " timeout %d %s\n", 2644 ge->timeout.value, 2645 (ge->timeout.scale == MLY_TIMEOUT_SECONDS) ? "seconds" : 2646 ((ge->timeout.scale == MLY_TIMEOUT_MINUTES) ? "minutes" : "hours")); 2647 mly_printf(sc, " maximum_sense_size %d\n", ge->maximum_sense_size); 2648 switch(ge->opcode) { 2649 case MDACMD_SCSIPT: 2650 case MDACMD_SCSI: 2651 mly_printf(sc, " cdb length %d\n", ss->cdb_length); 2652 mly_printf(sc, " cdb %s\n", 2653 hexncpy(ss->cdb, ss->cdb_length, hexstr, HEX_NCPYLEN(ss->cdb_length), " ")); 2654 transfer = 1; 2655 break; 2656 case MDACMD_SCSILC: 2657 case MDACMD_SCSILCPT: 2658 mly_printf(sc, " cdb length %d\n", sl->cdb_length); 2659 mly_printf(sc, " cdb 0x%llx\n", sl->cdb_physaddr); 2660 transfer = 1; 2661 break; 2662 case MDACMD_IOCTL: 2663 mly_printf(sc, " sub_ioctl 0x%x\n", io->sub_ioctl); 2664 switch(io->sub_ioctl) { 2665 case MDACIOCTL_SETMEMORYMAILBOX: 2666 mly_printf(sc, " health_buffer_size %d\n", 2667 io->param.setmemorymailbox.health_buffer_size); 2668 mly_printf(sc, " health_buffer_phys 0x%llx\n", 2669 io->param.setmemorymailbox.health_buffer_physaddr); 2670 mly_printf(sc, " command_mailbox 0x%llx\n", 2671 io->param.setmemorymailbox.command_mailbox_physaddr); 2672 mly_printf(sc, " status_mailbox 0x%llx\n", 2673 io->param.setmemorymailbox.status_mailbox_physaddr); 2674 transfer = 0; 2675 break; 2676 2677 case MDACIOCTL_SETREALTIMECLOCK: 2678 case MDACIOCTL_GETHEALTHSTATUS: 2679 case MDACIOCTL_GETCONTROLLERINFO: 2680 case MDACIOCTL_GETLOGDEVINFOVALID: 2681 case MDACIOCTL_GETPHYSDEVINFOVALID: 2682 case MDACIOCTL_GETPHYSDEVSTATISTICS: 2683 case MDACIOCTL_GETLOGDEVSTATISTICS: 2684 case MDACIOCTL_GETCONTROLLERSTATISTICS: 2685 case MDACIOCTL_GETBDT_FOR_SYSDRIVE: 2686 case MDACIOCTL_CREATENEWCONF: 2687 case MDACIOCTL_ADDNEWCONF: 2688 case MDACIOCTL_GETDEVCONFINFO: 2689 case MDACIOCTL_GETFREESPACELIST: 2690 case MDACIOCTL_MORE: 2691 case MDACIOCTL_SETPHYSDEVPARAMETER: 2692 case MDACIOCTL_GETPHYSDEVPARAMETER: 2693 case MDACIOCTL_GETLOGDEVPARAMETER: 2694 case MDACIOCTL_SETLOGDEVPARAMETER: 2695 mly_printf(sc, " param %10D\n", io->param.data.param, " "); 2696 transfer = 1; 2697 break; 2698 2699 case MDACIOCTL_GETEVENT: 2700 mly_printf(sc, " event %d\n", 2701 io->param.getevent.sequence_number_low + ((u_int32_t)io->addr.log.logdev << 16)); 2702 transfer = 1; 2703 break; 2704 2705 case MDACIOCTL_SETRAIDDEVSTATE: 2706 mly_printf(sc, " state %d\n", io->param.setraiddevstate.state); 2707 transfer = 0; 2708 break; 2709 2710 case MDACIOCTL_XLATEPHYSDEVTORAIDDEV: 2711 mly_printf(sc, " raid_device %d\n", io->param.xlatephysdevtoraiddev.raid_device); 2712 mly_printf(sc, " controller %d\n", io->param.xlatephysdevtoraiddev.controller); 2713 mly_printf(sc, " channel %d\n", io->param.xlatephysdevtoraiddev.channel); 2714 mly_printf(sc, " target %d\n", io->param.xlatephysdevtoraiddev.target); 2715 mly_printf(sc, " lun %d\n", io->param.xlatephysdevtoraiddev.lun); 2716 transfer = 0; 2717 break; 2718 2719 case MDACIOCTL_GETGROUPCONFINFO: 2720 mly_printf(sc, " group %d\n", io->param.getgroupconfinfo.group); 2721 transfer = 1; 2722 break; 2723 2724 case MDACIOCTL_GET_SUBSYSTEM_DATA: 2725 case MDACIOCTL_SET_SUBSYSTEM_DATA: 2726 case MDACIOCTL_STARTDISOCVERY: 2727 case MDACIOCTL_INITPHYSDEVSTART: 2728 case MDACIOCTL_INITPHYSDEVSTOP: 2729 case MDACIOCTL_INITRAIDDEVSTART: 2730 case MDACIOCTL_INITRAIDDEVSTOP: 2731 case MDACIOCTL_REBUILDRAIDDEVSTART: 2732 case MDACIOCTL_REBUILDRAIDDEVSTOP: 2733 case MDACIOCTL_MAKECONSISTENTDATASTART: 2734 case MDACIOCTL_MAKECONSISTENTDATASTOP: 2735 case MDACIOCTL_CONSISTENCYCHECKSTART: 2736 case MDACIOCTL_CONSISTENCYCHECKSTOP: 2737 case MDACIOCTL_RESETDEVICE: 2738 case MDACIOCTL_FLUSHDEVICEDATA: 2739 case MDACIOCTL_PAUSEDEVICE: 2740 case MDACIOCTL_UNPAUSEDEVICE: 2741 case MDACIOCTL_LOCATEDEVICE: 2742 case MDACIOCTL_SETMASTERSLAVEMODE: 2743 case MDACIOCTL_DELETERAIDDEV: 2744 case MDACIOCTL_REPLACEINTERNALDEV: 2745 case MDACIOCTL_CLEARCONF: 2746 case MDACIOCTL_GETCONTROLLERPARAMETER: 2747 case MDACIOCTL_SETCONTRLLERPARAMETER: 2748 case MDACIOCTL_CLEARCONFSUSPMODE: 2749 case MDACIOCTL_STOREIMAGE: 2750 case MDACIOCTL_READIMAGE: 2751 case MDACIOCTL_FLASHIMAGES: 2752 case MDACIOCTL_RENAMERAIDDEV: 2753 default: /* no idea what to print */ 2754 transfer = 0; 2755 break; 2756 } 2757 break; 2758 2759 case MDACMD_IOCTLCHECK: 2760 case MDACMD_MEMCOPY: 2761 default: 2762 transfer = 0; 2763 break; /* print nothing */ 2764 } 2765 if (transfer) { 2766 if (ge->command_control.extended_sg_table) { 2767 mly_printf(sc, " sg table 0x%llx/%d\n", 2768 ge->transfer.indirect.table_physaddr[0], ge->transfer.indirect.entries[0]); 2769 } else { 2770 mly_printf(sc, " 0000 0x%llx/%lld\n", 2771 ge->transfer.direct.sg[0].physaddr, ge->transfer.direct.sg[0].length); 2772 mly_printf(sc, " 0001 0x%llx/%lld\n", 2773 ge->transfer.direct.sg[1].physaddr, ge->transfer.direct.sg[1].length); 2774 } 2775 } 2776 } 2777 2778 /******************************************************************************** 2779 * Panic in a slightly informative fashion 2780 */ 2781 static void 2782 mly_panic(struct mly_softc *sc, char *reason) 2783 { 2784 mly_printstate(sc); 2785 panic(reason); 2786 } 2787 2788 /******************************************************************************** 2789 * Print queue statistics, callable from DDB. 2790 */ 2791 void 2792 mly_print_controller(int controller) 2793 { 2794 struct mly_softc *sc; 2795 2796 if ((sc = devclass_get_softc(devclass_find("mly"), controller)) == NULL) { 2797 kprintf("mly: controller %d invalid\n", controller); 2798 } else { 2799 device_printf(sc->mly_dev, "queue curr max\n"); 2800 device_printf(sc->mly_dev, "free %04d/%04d\n", 2801 sc->mly_qstat[MLYQ_FREE].q_length, sc->mly_qstat[MLYQ_FREE].q_max); 2802 device_printf(sc->mly_dev, "busy %04d/%04d\n", 2803 sc->mly_qstat[MLYQ_BUSY].q_length, sc->mly_qstat[MLYQ_BUSY].q_max); 2804 device_printf(sc->mly_dev, "complete %04d/%04d\n", 2805 sc->mly_qstat[MLYQ_COMPLETE].q_length, sc->mly_qstat[MLYQ_COMPLETE].q_max); 2806 } 2807 } 2808 #endif 2809 2810 2811 /******************************************************************************** 2812 ******************************************************************************** 2813 Control device interface 2814 ******************************************************************************** 2815 ********************************************************************************/ 2816 2817 /******************************************************************************** 2818 * Accept an open operation on the control device. 2819 */ 2820 static int 2821 mly_user_open(struct dev_open_args *ap) 2822 { 2823 cdev_t dev = ap->a_head.a_dev; 2824 int unit = minor(dev); 2825 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 2826 2827 sc->mly_state |= MLY_STATE_OPEN; 2828 return(0); 2829 } 2830 2831 /******************************************************************************** 2832 * Accept the last close on the control device. 2833 */ 2834 static int 2835 mly_user_close(struct dev_close_args *ap) 2836 { 2837 cdev_t dev = ap->a_head.a_dev; 2838 int unit = minor(dev); 2839 struct mly_softc *sc = devclass_get_softc(devclass_find("mly"), unit); 2840 2841 sc->mly_state &= ~MLY_STATE_OPEN; 2842 return (0); 2843 } 2844 2845 /******************************************************************************** 2846 * Handle controller-specific control operations. 2847 */ 2848 static int 2849 mly_user_ioctl(struct dev_ioctl_args *ap) 2850 { 2851 cdev_t dev = ap->a_head.a_dev; 2852 caddr_t addr = ap->a_data; 2853 u_long cmd = ap->a_cmd; 2854 struct mly_softc *sc = (struct mly_softc *)dev->si_drv1; 2855 struct mly_user_command *uc = (struct mly_user_command *)addr; 2856 struct mly_user_health *uh = (struct mly_user_health *)addr; 2857 2858 switch(cmd) { 2859 case MLYIO_COMMAND: 2860 return(mly_user_command(sc, uc)); 2861 case MLYIO_HEALTH: 2862 return(mly_user_health(sc, uh)); 2863 default: 2864 return(ENOIOCTL); 2865 } 2866 } 2867 2868 /******************************************************************************** 2869 * Execute a command passed in from userspace. 2870 * 2871 * The control structure contains the actual command for the controller, as well 2872 * as the user-space data pointer and data size, and an optional sense buffer 2873 * size/pointer. On completion, the data size is adjusted to the command 2874 * residual, and the sense buffer size to the size of the returned sense data. 2875 * 2876 */ 2877 static int 2878 mly_user_command(struct mly_softc *sc, struct mly_user_command *uc) 2879 { 2880 struct mly_command *mc; 2881 int error; 2882 2883 /* allocate a command */ 2884 if (mly_alloc_command(sc, &mc)) { 2885 error = ENOMEM; 2886 goto out; /* XXX Linux version will wait for a command */ 2887 } 2888 2889 /* handle data size/direction */ 2890 mc->mc_length = (uc->DataTransferLength >= 0) ? uc->DataTransferLength : -uc->DataTransferLength; 2891 if (mc->mc_length > 0) 2892 mc->mc_data = kmalloc(mc->mc_length, M_DEVBUF, M_INTWAIT); 2893 if (uc->DataTransferLength > 0) { 2894 mc->mc_flags |= MLY_CMD_DATAIN; 2895 bzero(mc->mc_data, mc->mc_length); 2896 } 2897 if (uc->DataTransferLength < 0) { 2898 mc->mc_flags |= MLY_CMD_DATAOUT; 2899 if ((error = copyin(uc->DataTransferBuffer, mc->mc_data, mc->mc_length)) != 0) 2900 goto out; 2901 } 2902 2903 /* copy the controller command */ 2904 bcopy(&uc->CommandMailbox, mc->mc_packet, sizeof(uc->CommandMailbox)); 2905 2906 /* clear command completion handler so that we get woken up */ 2907 mc->mc_complete = NULL; 2908 2909 /* execute the command */ 2910 if ((error = mly_start(mc)) != 0) 2911 goto out; 2912 crit_enter(); 2913 while (!(mc->mc_flags & MLY_CMD_COMPLETE)) 2914 tsleep(mc, 0, "mlyioctl", 0); 2915 crit_exit(); 2916 2917 /* return the data to userspace */ 2918 if (uc->DataTransferLength > 0) 2919 if ((error = copyout(mc->mc_data, uc->DataTransferBuffer, mc->mc_length)) != 0) 2920 goto out; 2921 2922 /* return the sense buffer to userspace */ 2923 if ((uc->RequestSenseLength > 0) && (mc->mc_sense > 0)) { 2924 if ((error = copyout(mc->mc_packet, uc->RequestSenseBuffer, 2925 min(uc->RequestSenseLength, mc->mc_sense))) != 0) 2926 goto out; 2927 } 2928 2929 /* return command results to userspace (caller will copy out) */ 2930 uc->DataTransferLength = mc->mc_resid; 2931 uc->RequestSenseLength = min(uc->RequestSenseLength, mc->mc_sense); 2932 uc->CommandStatus = mc->mc_status; 2933 error = 0; 2934 2935 out: 2936 if (mc->mc_data != NULL) 2937 kfree(mc->mc_data, M_DEVBUF); 2938 if (mc != NULL) 2939 mly_release_command(mc); 2940 return(error); 2941 } 2942 2943 /******************************************************************************** 2944 * Return health status to userspace. If the health change index in the user 2945 * structure does not match that currently exported by the controller, we 2946 * return the current status immediately. Otherwise, we block until either 2947 * interrupted or new status is delivered. 2948 */ 2949 static int 2950 mly_user_health(struct mly_softc *sc, struct mly_user_health *uh) 2951 { 2952 struct mly_health_status mh; 2953 int error; 2954 2955 /* fetch the current health status from userspace */ 2956 if ((error = copyin(uh->HealthStatusBuffer, &mh, sizeof(mh))) != 0) 2957 return(error); 2958 2959 /* spin waiting for a status update */ 2960 crit_enter(); 2961 error = EWOULDBLOCK; 2962 while ((error != 0) && (sc->mly_event_change == mh.change_counter)) 2963 error = tsleep(&sc->mly_event_change, PCATCH, "mlyhealth", 0); 2964 crit_exit(); 2965 2966 /* copy the controller's health status buffer out (there is a race here if it changes again) */ 2967 error = copyout(&sc->mly_mmbox->mmm_health.status, uh->HealthStatusBuffer, 2968 sizeof(uh->HealthStatusBuffer)); 2969 return(error); 2970 } 2971 2972 #ifdef MLY_DEBUG 2973 static int 2974 mly_timeout(struct mly_softc *sc) 2975 { 2976 struct mly_command *mc; 2977 int deadline; 2978 2979 deadline = time_uptime - MLY_CMD_TIMEOUT; 2980 TAILQ_FOREACH(mc, &sc->mly_busy, mc_link) { 2981 if ((mc->mc_timestamp < deadline)) { 2982 device_printf(sc->mly_dev, 2983 "COMMAND %p TIMEOUT AFTER %d SECONDS\n", mc, 2984 (int)(time_uptime - mc->mc_timestamp)); 2985 } 2986 } 2987 2988 callout_reset(&sc->mly_timeout, MLY_CMD_TIMEOUT * hz, 2989 (timeout_t *)mly_timeout, sc); 2990 2991 return (0); 2992 } 2993 #endif 2994