twe_freebsd.c revision 91790
1/*- 2 * Copyright (c) 2000 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: head/sys/dev/twe/twe_freebsd.c 91790 2002-03-07 09:55:41Z msmith $ 28 */ 29 30/* 31 * FreeBSD-specific code. 32 */ 33 34#include <sys/param.h> 35#include <sys/cons.h> 36#include <machine/bus.h> 37#include <machine/clock.h> 38#include <machine/md_var.h> 39#include <vm/vm.h> 40#include <vm/pmap.h> 41#include <dev/twe/twe_compat.h> 42#include <dev/twe/twereg.h> 43#include <dev/twe/tweio.h> 44#include <dev/twe/twevar.h> 45#include <dev/twe/twe_tables.h> 46 47#include <sys/devicestat.h> 48 49static devclass_t twe_devclass; 50 51#ifdef TWE_DEBUG 52static u_int32_t twed_bio_in; 53#define TWED_BIO_IN twed_bio_in++ 54static u_int32_t twed_bio_out; 55#define TWED_BIO_OUT twed_bio_out++ 56#else 57#define TWED_BIO_IN 58#define TWED_BIO_OUT 59#endif 60 61/******************************************************************************** 62 ******************************************************************************** 63 Control device interface 64 ******************************************************************************** 65 ********************************************************************************/ 66 67static d_open_t twe_open; 68static d_close_t twe_close; 69static d_ioctl_t twe_ioctl_wrapper; 70 71#define TWE_CDEV_MAJOR 146 72 73static struct cdevsw twe_cdevsw = { 74 twe_open, 75 twe_close, 76 noread, 77 nowrite, 78 twe_ioctl_wrapper, 79 nopoll, 80 nommap, 81 nostrategy, 82 "twe", 83 TWE_CDEV_MAJOR, 84 nodump, 85 nopsize, 86 0 87}; 88 89/******************************************************************************** 90 * Accept an open operation on the control device. 91 */ 92static int 93twe_open(dev_t dev, int flags, int fmt, d_thread_t *td) 94{ 95 int unit = minor(dev); 96 struct twe_softc *sc = devclass_get_softc(twe_devclass, unit); 97 98 sc->twe_state |= TWE_STATE_OPEN; 99 return(0); 100} 101 102/******************************************************************************** 103 * Accept the last close on the control device. 104 */ 105static int 106twe_close(dev_t dev, int flags, int fmt, d_thread_t *td) 107{ 108 int unit = minor(dev); 109 struct twe_softc *sc = devclass_get_softc(twe_devclass, unit); 110 111 sc->twe_state &= ~TWE_STATE_OPEN; 112 return (0); 113} 114 115/******************************************************************************** 116 * Handle controller-specific control operations. 117 */ 118static int 119twe_ioctl_wrapper(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, d_thread_t *td) 120{ 121 struct twe_softc *sc = (struct twe_softc *)dev->si_drv1; 122 123 return(twe_ioctl(sc, cmd, addr)); 124} 125 126/******************************************************************************** 127 ******************************************************************************** 128 PCI device interface 129 ******************************************************************************** 130 ********************************************************************************/ 131 132static int twe_probe(device_t dev); 133static int twe_attach(device_t dev); 134static void twe_free(struct twe_softc *sc); 135static int twe_detach(device_t dev); 136static int twe_shutdown(device_t dev); 137static int twe_suspend(device_t dev); 138static int twe_resume(device_t dev); 139static void twe_pci_intr(void *arg); 140static void twe_intrhook(void *arg); 141 142static device_method_t twe_methods[] = { 143 /* Device interface */ 144 DEVMETHOD(device_probe, twe_probe), 145 DEVMETHOD(device_attach, twe_attach), 146 DEVMETHOD(device_detach, twe_detach), 147 DEVMETHOD(device_shutdown, twe_shutdown), 148 DEVMETHOD(device_suspend, twe_suspend), 149 DEVMETHOD(device_resume, twe_resume), 150 151 DEVMETHOD(bus_print_child, bus_generic_print_child), 152 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 153 { 0, 0 } 154}; 155 156static driver_t twe_pci_driver = { 157 "twe", 158 twe_methods, 159 sizeof(struct twe_softc) 160}; 161 162#ifdef TWE_OVERRIDE 163DRIVER_MODULE(Xtwe, pci, twe_pci_driver, twe_devclass, 0, 0); 164#else 165DRIVER_MODULE(twe, pci, twe_pci_driver, twe_devclass, 0, 0); 166#endif 167 168/******************************************************************************** 169 * Match a 3ware Escalade ATA RAID controller. 170 */ 171static int 172twe_probe(device_t dev) 173{ 174 175 debug_called(4); 176 177 if ((pci_get_vendor(dev) == TWE_VENDOR_ID) && 178 ((pci_get_device(dev) == TWE_DEVICE_ID) || 179 (pci_get_device(dev) == TWE_DEVICE_ID_ASIC))) { 180 device_set_desc(dev, TWE_DEVICE_NAME); 181#ifdef TWE_OVERRIDE 182 return(0); 183#else 184 return(-10); 185#endif 186 } 187 return(ENXIO); 188} 189 190/******************************************************************************** 191 * Allocate resources, initialise the controller. 192 */ 193static int 194twe_attach(device_t dev) 195{ 196 struct twe_softc *sc; 197 int rid, error; 198 u_int32_t command; 199 200 debug_called(4); 201 202 /* 203 * Initialise the softc structure. 204 */ 205 sc = device_get_softc(dev); 206 sc->twe_dev = dev; 207 208 /* 209 * Make sure we are going to be able to talk to this board. 210 */ 211 command = pci_read_config(dev, PCIR_COMMAND, 2); 212 if ((command & PCIM_CMD_PORTEN) == 0) { 213 twe_printf(sc, "register window not available\n"); 214 return(ENXIO); 215 } 216 /* 217 * Force the busmaster enable bit on, in case the BIOS forgot. 218 */ 219 command |= PCIM_CMD_BUSMASTEREN; 220 pci_write_config(dev, PCIR_COMMAND, command, 2); 221 222 /* 223 * Allocate the PCI register window. 224 */ 225 rid = TWE_IO_CONFIG_REG; 226 if ((sc->twe_io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE)) == NULL) { 227 twe_printf(sc, "can't allocate register window\n"); 228 twe_free(sc); 229 return(ENXIO); 230 } 231 sc->twe_btag = rman_get_bustag(sc->twe_io); 232 sc->twe_bhandle = rman_get_bushandle(sc->twe_io); 233 234 /* 235 * Allocate the parent bus DMA tag appropriate for PCI. 236 */ 237 if (bus_dma_tag_create(NULL, /* parent */ 238 1, 0, /* alignment, boundary */ 239 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 240 BUS_SPACE_MAXADDR, /* highaddr */ 241 NULL, NULL, /* filter, filterarg */ 242 MAXBSIZE, TWE_MAX_SGL_LENGTH, /* maxsize, nsegments */ 243 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 244 BUS_DMA_ALLOCNOW, /* flags */ 245 &sc->twe_parent_dmat)) { 246 twe_printf(sc, "can't allocate parent DMA tag\n"); 247 twe_free(sc); 248 return(ENOMEM); 249 } 250 251 /* 252 * Allocate and connect our interrupt. 253 */ 254 rid = 0; 255 if ((sc->twe_irq = bus_alloc_resource(sc->twe_dev, SYS_RES_IRQ, &rid, 0, ~0, 1, RF_SHAREABLE | RF_ACTIVE)) == NULL) { 256 twe_printf(sc, "can't allocate interrupt\n"); 257 twe_free(sc); 258 return(ENXIO); 259 } 260 if (bus_setup_intr(sc->twe_dev, sc->twe_irq, INTR_TYPE_BIO | INTR_ENTROPY, twe_pci_intr, sc, &sc->twe_intr)) { 261 twe_printf(sc, "can't set up interrupt\n"); 262 twe_free(sc); 263 return(ENXIO); 264 } 265 266 /* 267 * Create DMA tag for mapping objects into controller-addressable space. 268 */ 269 if (bus_dma_tag_create(sc->twe_parent_dmat, /* parent */ 270 1, 0, /* alignment, boundary */ 271 BUS_SPACE_MAXADDR, /* lowaddr */ 272 BUS_SPACE_MAXADDR, /* highaddr */ 273 NULL, NULL, /* filter, filterarg */ 274 MAXBSIZE, TWE_MAX_SGL_LENGTH,/* maxsize, nsegments */ 275 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 276 0, /* flags */ 277 &sc->twe_buffer_dmat)) { 278 twe_printf(sc, "can't allocate data buffer DMA tag\n"); 279 twe_free(sc); 280 return(ENOMEM); 281 } 282 283 /* 284 * Initialise the controller and driver core. 285 */ 286 if ((error = twe_setup(sc))) 287 return(error); 288 289 /* 290 * Print some information about the controller and configuration. 291 */ 292 twe_describe_controller(sc); 293 294 /* 295 * Create the control device. 296 */ 297 sc->twe_dev_t = make_dev(&twe_cdevsw, device_get_unit(sc->twe_dev), UID_ROOT, GID_OPERATOR, 298 S_IRUSR | S_IWUSR, "twe%d", device_get_unit(sc->twe_dev)); 299 sc->twe_dev_t->si_drv1 = sc; 300 /* 301 * Schedule ourselves to bring the controller up once interrupts are available. 302 * This isn't strictly necessary, since we disable interrupts while probing the 303 * controller, but it is more in keeping with common practice for other disk 304 * devices. 305 */ 306 sc->twe_ich.ich_func = twe_intrhook; 307 sc->twe_ich.ich_arg = sc; 308 if (config_intrhook_establish(&sc->twe_ich) != 0) { 309 twe_printf(sc, "can't establish configuration hook\n"); 310 twe_free(sc); 311 return(ENXIO); 312 } 313 314 return(0); 315} 316 317/******************************************************************************** 318 * Free all of the resources associated with (sc). 319 * 320 * Should not be called if the controller is active. 321 */ 322static void 323twe_free(struct twe_softc *sc) 324{ 325 struct twe_request *tr; 326 327 debug_called(4); 328 329 /* throw away any command buffers */ 330 while ((tr = twe_dequeue_free(sc)) != NULL) 331 twe_free_request(tr); 332 333 /* destroy the data-transfer DMA tag */ 334 if (sc->twe_buffer_dmat) 335 bus_dma_tag_destroy(sc->twe_buffer_dmat); 336 337 /* disconnect the interrupt handler */ 338 if (sc->twe_intr) 339 bus_teardown_intr(sc->twe_dev, sc->twe_irq, sc->twe_intr); 340 if (sc->twe_irq != NULL) 341 bus_release_resource(sc->twe_dev, SYS_RES_IRQ, 0, sc->twe_irq); 342 343 /* destroy the parent DMA tag */ 344 if (sc->twe_parent_dmat) 345 bus_dma_tag_destroy(sc->twe_parent_dmat); 346 347 /* release the register window mapping */ 348 if (sc->twe_io != NULL) 349 bus_release_resource(sc->twe_dev, SYS_RES_IOPORT, TWE_IO_CONFIG_REG, sc->twe_io); 350 351 /* destroy control device */ 352 if (sc->twe_dev_t != (dev_t)NULL) 353 destroy_dev(sc->twe_dev_t); 354} 355 356/******************************************************************************** 357 * Disconnect from the controller completely, in preparation for unload. 358 */ 359static int 360twe_detach(device_t dev) 361{ 362 struct twe_softc *sc = device_get_softc(dev); 363 int s, error; 364 365 debug_called(4); 366 367 error = EBUSY; 368 s = splbio(); 369 if (sc->twe_state & TWE_STATE_OPEN) 370 goto out; 371 372 /* 373 * Shut the controller down. 374 */ 375 if ((error = twe_shutdown(dev))) 376 goto out; 377 378 twe_free(sc); 379 380 error = 0; 381 out: 382 splx(s); 383 return(error); 384} 385 386/******************************************************************************** 387 * Bring the controller down to a dormant state and detach all child devices. 388 * 389 * Note that we can assume that the bioq on the controller is empty, as we won't 390 * allow shutdown if any device is open. 391 */ 392static int 393twe_shutdown(device_t dev) 394{ 395 struct twe_softc *sc = device_get_softc(dev); 396 int i, s, error; 397 398 debug_called(4); 399 400 s = splbio(); 401 error = 0; 402 403 /* 404 * Delete all our child devices. 405 */ 406 for (i = 0; i < TWE_MAX_UNITS; i++) { 407 if (sc->twe_drive[i].td_disk != 0) { 408 if ((error = device_delete_child(sc->twe_dev, sc->twe_drive[i].td_disk)) != 0) 409 goto out; 410 sc->twe_drive[i].td_disk = 0; 411 } 412 } 413 414 /* 415 * Bring the controller down. 416 */ 417 twe_deinit(sc); 418 419 out: 420 splx(s); 421 return(error); 422} 423 424/******************************************************************************** 425 * Bring the controller to a quiescent state, ready for system suspend. 426 */ 427static int 428twe_suspend(device_t dev) 429{ 430 struct twe_softc *sc = device_get_softc(dev); 431 int s; 432 433 debug_called(4); 434 435 s = splbio(); 436 sc->twe_state |= TWE_STATE_SUSPEND; 437 438 twe_disable_interrupts(sc); 439 splx(s); 440 441 return(0); 442} 443 444/******************************************************************************** 445 * Bring the controller back to a state ready for operation. 446 */ 447static int 448twe_resume(device_t dev) 449{ 450 struct twe_softc *sc = device_get_softc(dev); 451 452 debug_called(4); 453 454 sc->twe_state &= ~TWE_STATE_SUSPEND; 455 twe_enable_interrupts(sc); 456 457 return(0); 458} 459 460/******************************************************************************* 461 * Take an interrupt, or be poked by other code to look for interrupt-worthy 462 * status. 463 */ 464static void 465twe_pci_intr(void *arg) 466{ 467 twe_intr((struct twe_softc *)arg); 468} 469 470/******************************************************************************** 471 * Delayed-startup hook 472 */ 473static void 474twe_intrhook(void *arg) 475{ 476 struct twe_softc *sc = (struct twe_softc *)arg; 477 478 /* pull ourselves off the intrhook chain */ 479 config_intrhook_disestablish(&sc->twe_ich); 480 481 /* call core startup routine */ 482 twe_init(sc); 483} 484 485/******************************************************************************** 486 * Given a detected drive, attach it to the bio interface. 487 * 488 * This is called from twe_init. 489 */ 490void 491twe_attach_drive(struct twe_softc *sc, struct twe_drive *dr) 492{ 493 char buf[80]; 494 int error; 495 496 dr->td_disk = device_add_child(sc->twe_dev, NULL, -1); 497 if (dr->td_disk == NULL) { 498 twe_printf(sc, "device_add_child failed\n"); 499 return; 500 } 501 device_set_ivars(dr->td_disk, dr); 502 503 /* 504 * XXX It would make sense to test the online/initialising bits, but they seem to be 505 * always set... 506 */ 507 sprintf(buf, "%s, %s", twe_describe_code(twe_table_unittype, dr->td_type), 508 twe_describe_code(twe_table_unitstate, dr->td_state & TWE_PARAM_UNITSTATUS_MASK)); 509 device_set_desc_copy(dr->td_disk, buf); 510 511 if ((error = bus_generic_attach(sc->twe_dev)) != 0) 512 twe_printf(sc, "bus_generic_attach returned %d\n", error); 513} 514 515/******************************************************************************** 516 * Clear a PCI parity error. 517 */ 518void 519twe_clear_pci_parity_error(struct twe_softc *sc) 520{ 521 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_PARITY_ERROR); 522 pci_write_config(sc->twe_dev, PCIR_STATUS, TWE_PCI_CLEAR_PARITY_ERROR, 2); 523} 524 525/******************************************************************************** 526 * Clear a PCI abort. 527 */ 528void 529twe_clear_pci_abort(struct twe_softc *sc) 530{ 531 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_PCI_ABORT); 532 pci_write_config(sc->twe_dev, PCIR_STATUS, TWE_PCI_CLEAR_PCI_ABORT, 2); 533} 534 535/******************************************************************************** 536 ******************************************************************************** 537 Disk device 538 ******************************************************************************** 539 ********************************************************************************/ 540 541/* 542 * Disk device softc 543 */ 544struct twed_softc 545{ 546 device_t twed_dev; 547 dev_t twed_dev_t; 548 struct twe_softc *twed_controller; /* parent device softc */ 549 struct twe_drive *twed_drive; /* drive data in parent softc */ 550 struct disk twed_disk; /* generic disk handle */ 551 struct devstat twed_stats; /* accounting */ 552 struct disklabel twed_label; /* synthetic label */ 553 int twed_flags; 554#define TWED_OPEN (1<<0) /* drive is open (can't shut down) */ 555}; 556 557/* 558 * Disk device bus interface 559 */ 560static int twed_probe(device_t dev); 561static int twed_attach(device_t dev); 562static int twed_detach(device_t dev); 563 564static device_method_t twed_methods[] = { 565 DEVMETHOD(device_probe, twed_probe), 566 DEVMETHOD(device_attach, twed_attach), 567 DEVMETHOD(device_detach, twed_detach), 568 { 0, 0 } 569}; 570 571static driver_t twed_driver = { 572 "twed", 573 twed_methods, 574 sizeof(struct twed_softc) 575}; 576 577static devclass_t twed_devclass; 578#ifdef TWE_OVERRIDE 579DRIVER_MODULE(Xtwed, Xtwe, twed_driver, twed_devclass, 0, 0); 580#else 581DRIVER_MODULE(twed, twe, twed_driver, twed_devclass, 0, 0); 582#endif 583 584/* 585 * Disk device control interface. 586 */ 587static d_open_t twed_open; 588static d_close_t twed_close; 589static d_strategy_t twed_strategy; 590static d_dump_t twed_dump; 591 592#define TWED_CDEV_MAJOR 147 593 594static struct cdevsw twed_cdevsw = { 595 twed_open, 596 twed_close, 597 physread, 598 physwrite, 599 noioctl, 600 nopoll, 601 nommap, 602 twed_strategy, 603 "twed", 604 TWED_CDEV_MAJOR, 605 twed_dump, 606 nopsize, 607 D_DISK 608}; 609 610static struct cdevsw tweddisk_cdevsw; 611#ifdef FREEBSD_4 612static int disks_registered = 0; 613#endif 614 615/******************************************************************************** 616 * Handle open from generic layer. 617 * 618 * Note that this is typically only called by the diskslice code, and not 619 * for opens on subdevices (eg. slices, partitions). 620 */ 621static int 622twed_open(dev_t dev, int flags, int fmt, d_thread_t *td) 623{ 624 struct twed_softc *sc = (struct twed_softc *)dev->si_drv1; 625 struct disklabel *label; 626 627 debug_called(4); 628 629 if (sc == NULL) 630 return (ENXIO); 631 632 /* check that the controller is up and running */ 633 if (sc->twed_controller->twe_state & TWE_STATE_SHUTDOWN) 634 return(ENXIO); 635 636 /* build synthetic label */ 637 label = &sc->twed_disk.d_label; 638 bzero(label, sizeof(*label)); 639 label->d_type = DTYPE_ESDI; 640 label->d_secsize = TWE_BLOCK_SIZE; 641 label->d_nsectors = sc->twed_drive->td_sectors; 642 label->d_ntracks = sc->twed_drive->td_heads; 643 label->d_ncylinders = sc->twed_drive->td_cylinders; 644 label->d_secpercyl = sc->twed_drive->td_sectors * sc->twed_drive->td_heads; 645 label->d_secperunit = sc->twed_drive->td_size; 646 647 sc->twed_flags |= TWED_OPEN; 648 return (0); 649} 650 651/******************************************************************************** 652 * Handle last close of the disk device. 653 */ 654static int 655twed_close(dev_t dev, int flags, int fmt, d_thread_t *td) 656{ 657 struct twed_softc *sc = (struct twed_softc *)dev->si_drv1; 658 659 debug_called(4); 660 661 if (sc == NULL) 662 return (ENXIO); 663 664 sc->twed_flags &= ~TWED_OPEN; 665 return (0); 666} 667 668/******************************************************************************** 669 * Handle an I/O request. 670 */ 671static void 672twed_strategy(twe_bio *bp) 673{ 674 struct twed_softc *sc = (struct twed_softc *)TWE_BIO_SOFTC(bp); 675 676 debug_called(4); 677 678 TWED_BIO_IN; 679 680 /* bogus disk? */ 681 if (sc == NULL) { 682 TWE_BIO_SET_ERROR(bp, EINVAL); 683 printf("twe: bio for invalid disk!\n"); 684 TWE_BIO_DONE(bp); 685 TWED_BIO_OUT; 686 return; 687 } 688 689 /* perform accounting */ 690 TWE_BIO_STATS_START(bp); 691 692 /* queue the bio on the controller */ 693 twe_enqueue_bio(sc->twed_controller, bp); 694 695 /* poke the controller to start I/O */ 696 twe_startio(sc->twed_controller); 697 return; 698} 699 700/******************************************************************************** 701 * System crashdump support 702 */ 703int 704twed_dump(dev_t dev) 705{ 706 struct twed_softc *twed_sc = (struct twed_softc *)dev->si_drv1; 707 struct twe_softc *twe_sc = (struct twe_softc *)twed_sc->twed_controller; 708 u_int count, blkno, secsize; 709 vm_offset_t addr = 0; 710 long blkcnt; 711 int dumppages = MAXDUMPPGS; 712 int error; 713 int i; 714 715 if ((error = disk_dumpcheck(dev, &count, &blkno, &secsize))) 716 return(error); 717 718 if (!twed_sc || !twe_sc) 719 return(ENXIO); 720 721 blkcnt = howmany(PAGE_SIZE, secsize); 722 723 while (count > 0) { 724 caddr_t va = NULL; 725 726 if ((count / blkcnt) < dumppages) 727 dumppages = count / blkcnt; 728 729 for (i = 0; i < dumppages; ++i) { 730 vm_offset_t a = addr + (i * PAGE_SIZE); 731 if (is_physical_memory(a)) 732 va = pmap_kenter_temporary(trunc_page(a), i); 733 else 734 va = pmap_kenter_temporary(trunc_page(0), i); 735 } 736 737 if ((error = twe_dump_blocks(twe_sc, twed_sc->twed_drive->td_unit, blkno, va, 738 (PAGE_SIZE * dumppages) / TWE_BLOCK_SIZE)) != 0) 739 return(error); 740 741 742 if (dumpstatus(addr, (off_t)count * DEV_BSIZE) < 0) 743 return(EINTR); 744 745 blkno += blkcnt * dumppages; 746 count -= blkcnt * dumppages; 747 addr += PAGE_SIZE * dumppages; 748 } 749 return(0); 750} 751 752/******************************************************************************** 753 * Handle completion of an I/O request. 754 */ 755void 756twed_intr(twe_bio *bp) 757{ 758 debug_called(4); 759 760 /* if no error, transfer completed */ 761 if (!TWE_BIO_HAS_ERROR(bp)) 762 TWE_BIO_RESID(bp) = 0; 763 764 TWE_BIO_STATS_END(bp); 765 TWE_BIO_DONE(bp); 766 TWED_BIO_OUT; 767} 768 769/******************************************************************************** 770 * Default probe stub. 771 */ 772static int 773twed_probe(device_t dev) 774{ 775 return (0); 776} 777 778/******************************************************************************** 779 * Attach a unit to the controller. 780 */ 781static int 782twed_attach(device_t dev) 783{ 784 struct twed_softc *sc; 785 device_t parent; 786 dev_t dsk; 787 788 debug_called(4); 789 790 /* initialise our softc */ 791 sc = device_get_softc(dev); 792 parent = device_get_parent(dev); 793 sc->twed_controller = (struct twe_softc *)device_get_softc(parent); 794 sc->twed_drive = device_get_ivars(dev); 795 sc->twed_dev = dev; 796 797 /* report the drive */ 798 twed_printf(sc, "%uMB (%u sectors)\n", 799 sc->twed_drive->td_size / ((1024 * 1024) / TWE_BLOCK_SIZE), 800 sc->twed_drive->td_size); 801 802 devstat_add_entry(&sc->twed_stats, "twed", device_get_unit(dev), TWE_BLOCK_SIZE, 803 DEVSTAT_NO_ORDERED_TAGS, 804 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 805 DEVSTAT_PRIORITY_ARRAY); 806 807 /* attach a generic disk device to ourselves */ 808 dsk = disk_create(device_get_unit(dev), &sc->twed_disk, 0, &twed_cdevsw, &tweddisk_cdevsw); 809 dsk->si_drv1 = sc; 810 dsk->si_drv2 = &sc->twed_drive->td_unit; 811 sc->twed_dev_t = dsk; 812#ifdef FREEBSD_4 813 disks_registered++; 814#endif 815 816 /* set the maximum I/O size to the theoretical maximum allowed by the S/G list size */ 817 dsk->si_iosize_max = (TWE_MAX_SGL_LENGTH - 1) * PAGE_SIZE; 818 819 return (0); 820} 821 822/******************************************************************************** 823 * Disconnect ourselves from the system. 824 */ 825static int 826twed_detach(device_t dev) 827{ 828 struct twed_softc *sc = (struct twed_softc *)device_get_softc(dev); 829 830 debug_called(4); 831 832 if (sc->twed_flags & TWED_OPEN) 833 return(EBUSY); 834 835 devstat_remove_entry(&sc->twed_stats); 836#ifdef FREEBSD_4 837 if (--disks_registered == 0) 838 cdevsw_remove(&tweddisk_cdevsw); 839#else 840 disk_destroy(sc->twed_dev_t); 841#endif 842 843 return(0); 844} 845 846/******************************************************************************** 847 ******************************************************************************** 848 Misc 849 ******************************************************************************** 850 ********************************************************************************/ 851 852static void twe_setup_data_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error); 853static void twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error); 854 855/******************************************************************************** 856 * Allocate a command buffer 857 */ 858MALLOC_DEFINE(TWE_MALLOC_CLASS, "twe commands", "twe commands"); 859 860struct twe_request * 861twe_allocate_request(struct twe_softc *sc) 862{ 863 struct twe_request *tr; 864 865 if ((tr = malloc(sizeof(struct twe_request), TWE_MALLOC_CLASS, M_NOWAIT)) == NULL) 866 return(NULL); 867 bzero(tr, sizeof(*tr)); 868 tr->tr_sc = sc; 869 if (bus_dmamap_create(sc->twe_buffer_dmat, 0, &tr->tr_cmdmap)) { 870 twe_free_request(tr); 871 return(NULL); 872 } 873 if (bus_dmamap_create(sc->twe_buffer_dmat, 0, &tr->tr_dmamap)) { 874 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_cmdmap); 875 twe_free_request(tr); 876 return(NULL); 877 } 878 return(tr); 879} 880 881/******************************************************************************** 882 * Permanently discard a command buffer. 883 */ 884void 885twe_free_request(struct twe_request *tr) 886{ 887 struct twe_softc *sc = tr->tr_sc; 888 889 debug_called(4); 890 891 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_cmdmap); 892 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_dmamap); 893 free(tr, TWE_MALLOC_CLASS); 894} 895 896/******************************************************************************** 897 * Map/unmap (tr)'s command and data in the controller's addressable space. 898 * 899 * These routines ensure that the data which the controller is going to try to 900 * access is actually visible to the controller, in a machine-independant 901 * fashion. Due to a hardware limitation, I/O buffers must be 512-byte aligned 902 * and we take care of that here as well. 903 */ 904static void 905twe_setup_data_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error) 906{ 907 struct twe_request *tr = (struct twe_request *)arg; 908 TWE_Command *cmd = &tr->tr_command; 909 int i; 910 911 debug_called(4); 912 913 /* save base of first segment in command (applicable if there only one segment) */ 914 tr->tr_dataphys = segs[0].ds_addr; 915 916 /* correct command size for s/g list size */ 917 tr->tr_command.generic.size += 2 * nsegments; 918 919 /* 920 * Due to the fact that parameter and I/O commands have the scatter/gather list in 921 * different places, we need to determine which sort of command this actually is 922 * before we can populate it correctly. 923 */ 924 switch(cmd->generic.opcode) { 925 case TWE_OP_GET_PARAM: 926 case TWE_OP_SET_PARAM: 927 cmd->generic.sgl_offset = 2; 928 for (i = 0; i < nsegments; i++) { 929 cmd->param.sgl[i].address = segs[i].ds_addr; 930 cmd->param.sgl[i].length = segs[i].ds_len; 931 } 932 for (; i < TWE_MAX_SGL_LENGTH; i++) { /* XXX necessary? */ 933 cmd->param.sgl[i].address = 0; 934 cmd->param.sgl[i].length = 0; 935 } 936 break; 937 case TWE_OP_READ: 938 case TWE_OP_WRITE: 939 cmd->generic.sgl_offset = 3; 940 for (i = 0; i < nsegments; i++) { 941 cmd->io.sgl[i].address = segs[i].ds_addr; 942 cmd->io.sgl[i].length = segs[i].ds_len; 943 } 944 for (; i < TWE_MAX_SGL_LENGTH; i++) { /* XXX necessary? */ 945 cmd->io.sgl[i].address = 0; 946 cmd->io.sgl[i].length = 0; 947 } 948 break; 949 default: 950 /* no s/g list, nothing to do */ 951 } 952} 953 954static void 955twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error) 956{ 957 struct twe_request *tr = (struct twe_request *)arg; 958 959 debug_called(4); 960 961 /* command can't cross a page boundary */ 962 tr->tr_cmdphys = segs[0].ds_addr; 963} 964 965void 966twe_map_request(struct twe_request *tr) 967{ 968 struct twe_softc *sc = tr->tr_sc; 969 970 debug_called(4); 971 972 973 /* 974 * Map the command into bus space. 975 */ 976 bus_dmamap_load(sc->twe_buffer_dmat, tr->tr_cmdmap, &tr->tr_command, sizeof(tr->tr_command), 977 twe_setup_request_dmamap, tr, 0); 978 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_cmdmap, BUS_DMASYNC_PREWRITE); 979 980 /* 981 * If the command involves data, map that too. 982 */ 983 if (tr->tr_data != NULL) { 984 985 /* 986 * Data must be 64-byte aligned; allocate a fixup buffer if it's not. 987 */ 988 if (((vm_offset_t)tr->tr_data % TWE_ALIGNMENT) != 0) { 989 tr->tr_realdata = tr->tr_data; /* save pointer to 'real' data */ 990 tr->tr_flags |= TWE_CMD_ALIGNBUF; 991 tr->tr_data = malloc(tr->tr_length, TWE_MALLOC_CLASS, M_NOWAIT); /* XXX check result here */ 992 } 993 994 /* 995 * Map the data buffer into bus space and build the s/g list. 996 */ 997 bus_dmamap_load(sc->twe_buffer_dmat, tr->tr_dmamap, tr->tr_data, tr->tr_length, 998 twe_setup_data_dmamap, tr, 0); 999 if (tr->tr_flags & TWE_CMD_DATAIN) 1000 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_PREREAD); 1001 if (tr->tr_flags & TWE_CMD_DATAOUT) { 1002 /* if we're using an alignment buffer, and we're writing data, copy the real data out */ 1003 if (tr->tr_flags & TWE_CMD_ALIGNBUF) 1004 bcopy(tr->tr_realdata, tr->tr_data, tr->tr_length); 1005 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_PREWRITE); 1006 } 1007 } 1008} 1009 1010void 1011twe_unmap_request(struct twe_request *tr) 1012{ 1013 struct twe_softc *sc = tr->tr_sc; 1014 1015 debug_called(4); 1016 1017 /* 1018 * Unmap the command from bus space. 1019 */ 1020 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_cmdmap, BUS_DMASYNC_POSTWRITE); 1021 bus_dmamap_unload(sc->twe_buffer_dmat, tr->tr_cmdmap); 1022 1023 /* 1024 * If the command involved data, unmap that too. 1025 */ 1026 if (tr->tr_data != NULL) { 1027 1028 if (tr->tr_flags & TWE_CMD_DATAIN) { 1029 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_POSTREAD); 1030 /* if we're using an alignment buffer, and we're reading data, copy the real data in */ 1031 if (tr->tr_flags & TWE_CMD_ALIGNBUF) 1032 bcopy(tr->tr_data, tr->tr_realdata, tr->tr_length); 1033 } 1034 if (tr->tr_flags & TWE_CMD_DATAOUT) 1035 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_POSTWRITE); 1036 1037 bus_dmamap_unload(sc->twe_buffer_dmat, tr->tr_dmamap); 1038 } 1039 1040 /* free alignment buffer if it was used */ 1041 if (tr->tr_flags & TWE_CMD_ALIGNBUF) { 1042 free(tr->tr_data, TWE_MALLOC_CLASS); 1043 tr->tr_data = tr->tr_realdata; /* restore 'real' data pointer */ 1044 } 1045} 1046 1047#ifdef TWE_DEBUG 1048/******************************************************************************** 1049 * Print current controller status, call from DDB. 1050 */ 1051void 1052twe_report(void) 1053{ 1054 struct twe_softc *sc; 1055 int i, s; 1056 1057 s = splbio(); 1058 for (i = 0; (sc = devclass_get_softc(twe_devclass, i)) != NULL; i++) 1059 twe_print_controller(sc); 1060 printf("twed: total bio count in %u out %u\n", twed_bio_in, twed_bio_out); 1061 splx(s); 1062} 1063#endif 1064