sys/dev/twa/tw_osl_freebsd.c

   1 /*
   2  * Copyright (c) 2004-07 Applied Micro Circuits Corporation.
   3  * Copyright (c) 2004-05 Vinod Kashyap.
   4  * Copyright (c) 2000 Michael Smith
   5  * Copyright (c) 2000 BSDi
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 /*
  34  * AMCC'S 3ware driver for 9000 series storage controllers.
  35  *
  36  * Author: Vinod Kashyap
  37  * Modifications by: Adam Radford
  38  * Modifications by: Manjunath Ranganathaiah
  39  */
  40
  41
  42 /*
  43  * FreeBSD specific functions not related to CAM, and other
  44  * miscellaneous functions.
  45  */
  46
  47
  48 #include <dev/twa/tw_osl_includes.h>
  49 #include <dev/twa/tw_cl_fwif.h>
  50 #include <dev/twa/tw_cl_ioctl.h>
  51 #include <dev/twa/tw_osl_ioctl.h>
  52
  53 #ifdef TW_OSL_DEBUG
  54 TW_INT32        TW_DEBUG_LEVEL_FOR_OSL = TW_OSL_DEBUG;
  55 TW_INT32        TW_OSL_DEBUG_LEVEL_FOR_CL = TW_OSL_DEBUG;
  56 #endif /* TW_OSL_DEBUG */
  57
  58 static MALLOC_DEFINE(TW_OSLI_MALLOC_CLASS, "twa_commands", "twa commands");
  59
  60
  61 static  d_open_t                twa_open;
  62 static  d_close_t               twa_close;
  63 static  d_ioctl_t               twa_ioctl;
  64
  65 static struct cdevsw twa_cdevsw = {
  66         .d_version =    D_VERSION,
  67         .d_open =       twa_open,
  68         .d_close =      twa_close,
  69         .d_ioctl =      twa_ioctl,
  70         .d_name =       "twa",
  71 };
  72
  73 static devclass_t       twa_devclass;
  74
  75
  76 /*
  77  * Function name:       twa_open
  78  * Description:         Called when the controller is opened.
  79  *                      Simply marks the controller as open.
  80  *
  81  * Input:               dev     -- control device corresponding to the ctlr
  82  *                      flags   -- mode of open
  83  *                      fmt     -- device type (character/block etc.)
  84  *                      proc    -- current process
  85  * Output:              None
  86  * Return value:        0       -- success
  87  *                      non-zero-- failure
  88  */
  89 static TW_INT32
  90 twa_open(struct cdev *dev, TW_INT32 flags, TW_INT32 fmt, struct thread *proc)
  91 {
  92         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
  93
  94         tw_osli_dbg_dprintf(5, sc, "entered");
  95         sc->open = TW_CL_TRUE;
  96         return(0);
  97 }
  98
  99
 100
 101 /*
 102  * Function name:       twa_close
 103  * Description:         Called when the controller is closed.
 104  *                      Simply marks the controller as not open.
 105  *
 106  * Input:               dev     -- control device corresponding to the ctlr
 107  *                      flags   -- mode of corresponding open
 108  *                      fmt     -- device type (character/block etc.)
 109  *                      proc    -- current process
 110  * Output:              None
 111  * Return value:        0       -- success
 112  *                      non-zero-- failure
 113  */
 114 static TW_INT32
 115 twa_close(struct cdev *dev, TW_INT32 flags, TW_INT32 fmt, struct thread *proc)
 116 {
 117         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 118
 119         tw_osli_dbg_dprintf(5, sc, "entered");
 120         sc->open = TW_CL_FALSE;
 121         return(0);
 122 }
 123
 124
 125
 126 /*
 127  * Function name:       twa_ioctl
 128  * Description:         Called when an ioctl is posted to the controller.
 129  *                      Handles any OS Layer specific cmds, passes the rest
 130  *                      on to the Common Layer.
 131  *
 132  * Input:               dev     -- control device corresponding to the ctlr
 133  *                      cmd     -- ioctl cmd
 134  *                      buf     -- ptr to buffer in kernel memory, which is
 135  *                                 a copy of the input buffer in user-space
 136  *                      flags   -- mode of corresponding open
 137  *                      proc    -- current process
 138  * Output:              buf     -- ptr to buffer in kernel memory, which will
 139  *                                 be copied to the output buffer in user-space
 140  * Return value:        0       -- success
 141  *                      non-zero-- failure
 142  */
 143 static TW_INT32
 144 twa_ioctl(struct cdev *dev, u_long cmd, caddr_t buf, TW_INT32 flags, struct thread *proc)
 145 {
 146         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 147         TW_INT32                error;
 148
 149         tw_osli_dbg_dprintf(5, sc, "entered");
 150
 151         switch (cmd) {
 152         case TW_OSL_IOCTL_FIRMWARE_PASS_THROUGH:
 153                 tw_osli_dbg_dprintf(6, sc, "ioctl: fw_passthru");
 154                 error = tw_osli_fw_passthru(sc, (TW_INT8 *)buf);
 155                 break;
 156
 157         case TW_OSL_IOCTL_SCAN_BUS:
 158                 /* Request CAM for a bus scan. */
 159                 tw_osli_dbg_dprintf(6, sc, "ioctl: scan bus");
 160                 error = tw_osli_request_bus_scan(sc);
 161                 break;
 162
 163         default:
 164                 tw_osli_dbg_dprintf(6, sc, "ioctl: 0x%lx", cmd);
 165                 error = tw_cl_ioctl(&sc->ctlr_handle, cmd, buf);
 166                 break;
 167         }
 168         return(error);
 169 }
 170
 171
 172
 173 static TW_INT32 twa_probe(device_t dev);
 174 static TW_INT32 twa_attach(device_t dev);
 175 static TW_INT32 twa_detach(device_t dev);
 176 static TW_INT32 twa_shutdown(device_t dev);
 177 static TW_VOID  twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op);
 178 static TW_VOID  twa_pci_intr(TW_VOID *arg);
 179 static TW_VOID  twa_watchdog(TW_VOID *arg);
 180 int twa_setup_intr(struct twa_softc *sc);
 181 int twa_teardown_intr(struct twa_softc *sc);
 182
 183 static TW_INT32 tw_osli_alloc_mem(struct twa_softc *sc);
 184 static TW_VOID  tw_osli_free_resources(struct twa_softc *sc);
 185
 186 static TW_VOID  twa_map_load_data_callback(TW_VOID *arg,
 187         bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
 188 static TW_VOID  twa_map_load_callback(TW_VOID *arg,
 189         bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
 190
 191
 192 static device_method_t  twa_methods[] = {
 193         /* Device interface */
 194         DEVMETHOD(device_probe,         twa_probe),
 195         DEVMETHOD(device_attach,        twa_attach),
 196         DEVMETHOD(device_detach,        twa_detach),
 197         DEVMETHOD(device_shutdown,      twa_shutdown),
 198
 199         DEVMETHOD_END
 200 };
 201
 202 static driver_t twa_pci_driver = {
 203         "twa",
 204         twa_methods,
 205         sizeof(struct twa_softc)
 206 };
 207
 208 DRIVER_MODULE(twa, pci, twa_pci_driver, twa_devclass, 0, 0);
 209 MODULE_DEPEND(twa, cam, 1, 1, 1);
 210 MODULE_DEPEND(twa, pci, 1, 1, 1);
 211
 212
 213 /*
 214  * Function name:       twa_probe
 215  * Description:         Called at driver load time.  Claims 9000 ctlrs.
 216  *
 217  * Input:               dev     -- bus device corresponding to the ctlr
 218  * Output:              None
 219  * Return value:        <= 0    -- success
 220  *                      > 0     -- failure
 221  */
 222 static TW_INT32
 223 twa_probe(device_t dev)
 224 {
 225         static TW_UINT8 first_ctlr = 1;
 226
 227         tw_osli_dbg_printf(3, "entered");
 228
 229         if (tw_cl_ctlr_supported(pci_get_vendor(dev), pci_get_device(dev))) {
 230                 device_set_desc(dev, TW_OSLI_DEVICE_NAME);
 231                 /* Print the driver version only once. */
 232                 if (first_ctlr) {
 233                         printf("3ware device driver for 9000 series storage "
 234                                 "controllers, version: %s\n",
 235                                 TW_OSL_DRIVER_VERSION_STRING);
 236                         first_ctlr = 0;
 237                 }
 238                 return(0);
 239         }
 240         return(ENXIO);
 241 }
 242
 243 int twa_setup_intr(struct twa_softc *sc)
 244 {
 245         int error = 0;
 246
 247         if (!(sc->intr_handle) && (sc->irq_res)) {
 248                 error = bus_setup_intr(sc->bus_dev, sc->irq_res,
 249                                         INTR_TYPE_CAM | INTR_MPSAFE,
 250                                         NULL, twa_pci_intr,
 251                                         sc, &sc->intr_handle);
 252         }
 253         return( error );
 254 }
 255
 256
 257 int twa_teardown_intr(struct twa_softc *sc)
 258 {
 259         int error = 0;
 260
 261         if ((sc->intr_handle) && (sc->irq_res)) {
 262                 error = bus_teardown_intr(sc->bus_dev,
 263                                                 sc->irq_res, sc->intr_handle);
 264                 sc->intr_handle = NULL;
 265         }
 266         return( error );
 267 }
 268
 269
 270
 271 /*
 272  * Function name:       twa_attach
 273  * Description:         Allocates pci resources; updates sc; adds a node to the
 274  *                      sysctl tree to expose the driver version; makes calls
 275  *                      (to the Common Layer) to initialize ctlr, and to
 276  *                      attach to CAM.
 277  *
 278  * Input:               dev     -- bus device corresponding to the ctlr
 279  * Output:              None
 280  * Return value:        0       -- success
 281  *                      non-zero-- failure
 282  */
 283 static TW_INT32
 284 twa_attach(device_t dev)
 285 {
 286         struct twa_softc        *sc = device_get_softc(dev);
 287         TW_INT32                bar_num;
 288         TW_INT32                bar0_offset;
 289         TW_INT32                bar_size;
 290         TW_INT32                error;
 291
 292         tw_osli_dbg_dprintf(3, sc, "entered");
 293
 294         sc->ctlr_handle.osl_ctlr_ctxt = sc;
 295
 296         /* Initialize the softc structure. */
 297         sc->bus_dev = dev;
 298         sc->device_id = pci_get_device(dev);
 299
 300         /* Initialize the mutexes right here. */
 301         sc->io_lock = &(sc->io_lock_handle);
 302         mtx_init(sc->io_lock, "tw_osl_io_lock", NULL, MTX_SPIN);
 303         sc->q_lock = &(sc->q_lock_handle);
 304         mtx_init(sc->q_lock, "tw_osl_q_lock", NULL, MTX_SPIN);
 305         sc->sim_lock = &(sc->sim_lock_handle);
 306         mtx_init(sc->sim_lock, "tw_osl_sim_lock", NULL, MTX_DEF | MTX_RECURSE);
 307
 308         sysctl_ctx_init(&sc->sysctl_ctxt);
 309         sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctxt,
 310                 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
 311                 device_get_nameunit(dev), CTLFLAG_RD, 0, "");
 312         if (sc->sysctl_tree == NULL) {
 313                 tw_osli_printf(sc, "error = %d",
 314                         TW_CL_SEVERITY_ERROR_STRING,
 315                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 316                         0x2000,
 317                         "Cannot add sysctl tree node",
 318                         ENXIO);
 319                 return(ENXIO);
 320         }
 321         SYSCTL_ADD_STRING(&sc->sysctl_ctxt, SYSCTL_CHILDREN(sc->sysctl_tree),
 322                 OID_AUTO, "driver_version", CTLFLAG_RD,
 323                 TW_OSL_DRIVER_VERSION_STRING, 0, "TWA driver version");
 324
 325         /* Force the busmaster enable bit on, in case the BIOS forgot. */
 326         pci_enable_busmaster(dev);
 327
 328         /* Allocate the PCI register window. */
 329         if ((error = tw_cl_get_pci_bar_info(sc->device_id, TW_CL_BAR_TYPE_MEM,
 330                 &bar_num, &bar0_offset, &bar_size))) {
 331                 tw_osli_printf(sc, "error = %d",
 332                         TW_CL_SEVERITY_ERROR_STRING,
 333                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 334                         0x201F,
 335                         "Can't get PCI BAR info",
 336                         error);
 337                 tw_osli_free_resources(sc);
 338                 return(error);
 339         }
 340         sc->reg_res_id = PCIR_BARS + bar0_offset;
 341         if ((sc->reg_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
 342                                 &(sc->reg_res_id), 0, ~0, 1, RF_ACTIVE))
 343                                 == NULL) {
 344                 tw_osli_printf(sc, "error = %d",
 345                         TW_CL_SEVERITY_ERROR_STRING,
 346                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 347                         0x2002,
 348                         "Can't allocate register window",
 349                         ENXIO);
 350                 tw_osli_free_resources(sc);
 351                 return(ENXIO);
 352         }
 353         sc->bus_tag = rman_get_bustag(sc->reg_res);
 354         sc->bus_handle = rman_get_bushandle(sc->reg_res);
 355
 356         /* Allocate and register our interrupt. */
 357         sc->irq_res_id = 0;
 358         if ((sc->irq_res = bus_alloc_resource(sc->bus_dev, SYS_RES_IRQ,
 359                                 &(sc->irq_res_id), 0, ~0, 1,
 360                                 RF_SHAREABLE | RF_ACTIVE)) == NULL) {
 361                 tw_osli_printf(sc, "error = %d",
 362                         TW_CL_SEVERITY_ERROR_STRING,
 363                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 364                         0x2003,
 365                         "Can't allocate interrupt",
 366                         ENXIO);
 367                 tw_osli_free_resources(sc);
 368                 return(ENXIO);
 369         }
 370         if ((error = twa_setup_intr(sc))) {
 371                 tw_osli_printf(sc, "error = %d",
 372                         TW_CL_SEVERITY_ERROR_STRING,
 373                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 374                         0x2004,
 375                         "Can't set up interrupt",
 376                         error);
 377                 tw_osli_free_resources(sc);
 378                 return(error);
 379         }
 380
 381         if ((error = tw_osli_alloc_mem(sc))) {
 382                 tw_osli_printf(sc, "error = %d",
 383                         TW_CL_SEVERITY_ERROR_STRING,
 384                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 385                         0x2005,
 386                         "Memory allocation failure",
 387                         error);
 388                 tw_osli_free_resources(sc);
 389                 return(error);
 390         }
 391
 392         /* Initialize the Common Layer for this controller. */
 393         if ((error = tw_cl_init_ctlr(&sc->ctlr_handle, sc->flags, sc->device_id,
 394                         TW_OSLI_MAX_NUM_REQUESTS, TW_OSLI_MAX_NUM_AENS,
 395                         sc->non_dma_mem, sc->dma_mem,
 396                         sc->dma_mem_phys
 397                         ))) {
 398                 tw_osli_printf(sc, "error = %d",
 399                         TW_CL_SEVERITY_ERROR_STRING,
 400                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 401                         0x2006,
 402                         "Failed to initialize Common Layer/controller",
 403                         error);
 404                 tw_osli_free_resources(sc);
 405                 return(error);
 406         }
 407
 408         /* Create the control device. */
 409         sc->ctrl_dev = make_dev(&twa_cdevsw, device_get_unit(sc->bus_dev),
 410                         UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR,
 411                         "twa%d", device_get_unit(sc->bus_dev));
 412         sc->ctrl_dev->si_drv1 = sc;
 413
 414         if ((error = tw_osli_cam_attach(sc))) {
 415                 tw_osli_free_resources(sc);
 416                 tw_osli_printf(sc, "error = %d",
 417                         TW_CL_SEVERITY_ERROR_STRING,
 418                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 419                         0x2007,
 420                         "Failed to initialize CAM",
 421                         error);
 422                 return(error);
 423         }
 424
 425         sc->watchdog_index = 0;
 426         callout_init(&(sc->watchdog_callout[0]), CALLOUT_MPSAFE);
 427         callout_init(&(sc->watchdog_callout[1]), CALLOUT_MPSAFE);
 428         callout_reset(&(sc->watchdog_callout[0]), 5*hz, twa_watchdog, &sc->ctlr_handle);
 429
 430         return(0);
 431 }
 432
 433
 434 static TW_VOID
 435 twa_watchdog(TW_VOID *arg)
 436 {
 437         struct tw_cl_ctlr_handle *ctlr_handle =
 438                 (struct tw_cl_ctlr_handle *)arg;
 439         struct twa_softc                *sc = ctlr_handle->osl_ctlr_ctxt;
 440         int                             i;
 441         int                             i_need_a_reset = 0;
 442         int                             driver_is_active = 0;
 443         int                             my_watchdog_was_pending = 1234;
 444         TW_UINT64                       current_time;
 445         struct tw_osli_req_context      *my_req;
 446
 447
 448 //==============================================================================
 449         current_time = (TW_UINT64) (tw_osl_get_local_time());
 450
 451         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 452                 my_req = &(sc->req_ctx_buf[i]);
 453
 454                 if ((my_req->state == TW_OSLI_REQ_STATE_BUSY) &&
 455                         (my_req->deadline) &&
 456                         (my_req->deadline < current_time)) {
 457                         tw_cl_set_reset_needed(ctlr_handle);
 458 #ifdef    TW_OSL_DEBUG
 459                         device_printf((sc)->bus_dev, "Request %d timed out! d = %llu, c = %llu\n", i, my_req->deadline, current_time);
 460 #else  /* TW_OSL_DEBUG */
 461                         device_printf((sc)->bus_dev, "Request %d timed out!\n", i);
 462 #endif /* TW_OSL_DEBUG */
 463                         break;
 464                 }
 465         }
 466 //==============================================================================
 467
 468         i_need_a_reset = tw_cl_is_reset_needed(ctlr_handle);
 469
 470         i = (int) ((sc->watchdog_index++) & 1);
 471
 472         driver_is_active = tw_cl_is_active(ctlr_handle);
 473
 474         if (i_need_a_reset) {
 475 #ifdef    TW_OSL_DEBUG
 476                 device_printf((sc)->bus_dev, "Watchdog rescheduled in 70 seconds\n");
 477 #endif /* TW_OSL_DEBUG */
 478                 my_watchdog_was_pending =
 479                         callout_reset(&(sc->watchdog_callout[i]), 70*hz, twa_watchdog, &sc->ctlr_handle);
 480                 tw_cl_reset_ctlr(ctlr_handle);
 481 #ifdef    TW_OSL_DEBUG
 482                 device_printf((sc)->bus_dev, "Watchdog reset completed!\n");
 483 #endif /* TW_OSL_DEBUG */
 484         } else if (driver_is_active) {
 485                 my_watchdog_was_pending =
 486                         callout_reset(&(sc->watchdog_callout[i]),  5*hz, twa_watchdog, &sc->ctlr_handle);
 487         }
 488 #ifdef    TW_OSL_DEBUG
 489         if (i_need_a_reset || my_watchdog_was_pending)
 490                 device_printf((sc)->bus_dev, "i_need_a_reset = %d, "
 491                 "driver_is_active = %d, my_watchdog_was_pending = %d\n",
 492                 i_need_a_reset, driver_is_active, my_watchdog_was_pending);
 493 #endif /* TW_OSL_DEBUG */
 494 }
 495
 496
 497 /*
 498  * Function name:       tw_osli_alloc_mem
 499  * Description:         Allocates memory needed both by CL and OSL.
 500  *
 501  * Input:               sc      -- OSL internal controller context
 502  * Output:              None
 503  * Return value:        0       -- success
 504  *                      non-zero-- failure
 505  */
 506 static TW_INT32
 507 tw_osli_alloc_mem(struct twa_softc *sc)
 508 {
 509         struct tw_osli_req_context      *req;
 510         TW_UINT32                       max_sg_elements;
 511         TW_UINT32                       non_dma_mem_size;
 512         TW_UINT32                       dma_mem_size;
 513         TW_INT32                        error;
 514         TW_INT32                        i;
 515
 516         tw_osli_dbg_dprintf(3, sc, "entered");
 517
 518         sc->flags |= (sizeof(bus_addr_t) == 8) ? TW_CL_64BIT_ADDRESSES : 0;
 519         sc->flags |= (sizeof(bus_size_t) == 8) ? TW_CL_64BIT_SG_LENGTH : 0;
 520
 521         max_sg_elements = (sizeof(bus_addr_t) == 8) ?
 522                 TW_CL_MAX_64BIT_SG_ELEMENTS : TW_CL_MAX_32BIT_SG_ELEMENTS;
 523
 524         if ((error = tw_cl_get_mem_requirements(&sc->ctlr_handle, sc->flags,
 525                         sc->device_id, TW_OSLI_MAX_NUM_REQUESTS,  TW_OSLI_MAX_NUM_AENS,
 526                         &(sc->alignment), &(sc->sg_size_factor),
 527                         &non_dma_mem_size, &dma_mem_size
 528                         ))) {
 529                 tw_osli_printf(sc, "error = %d",
 530                         TW_CL_SEVERITY_ERROR_STRING,
 531                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 532                         0x2008,
 533                         "Can't get Common Layer's memory requirements",
 534                         error);
 535                 return(error);
 536         }
 537
 538         if ((sc->non_dma_mem = malloc(non_dma_mem_size, TW_OSLI_MALLOC_CLASS,
 539                                 M_WAITOK)) == NULL) {
 540                 tw_osli_printf(sc, "error = %d",
 541                         TW_CL_SEVERITY_ERROR_STRING,
 542                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 543                         0x2009,
 544                         "Can't allocate non-dma memory",
 545                         ENOMEM);
 546                 return(ENOMEM);
 547         }
 548
 549         /* Create the parent dma tag. */
 550         if (bus_dma_tag_create(bus_get_dma_tag(sc->bus_dev), /* parent */
 551                                 sc->alignment,          /* alignment */
 552                                 0,                      /* boundary */
 553                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 554                                 BUS_SPACE_MAXADDR,      /* highaddr */
 555                                 NULL, NULL,             /* filter, filterarg */
 556                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 557                                 max_sg_elements,        /* nsegments */
 558                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 559                                 0,                      /* flags */
 560                                 NULL,                   /* lockfunc */
 561                                 NULL,                   /* lockfuncarg */
 562                                 &sc->parent_tag         /* tag */)) {
 563                 tw_osli_printf(sc, "error = %d",
 564                         TW_CL_SEVERITY_ERROR_STRING,
 565                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 566                         0x200A,
 567                         "Can't allocate parent DMA tag",
 568                         ENOMEM);
 569                 return(ENOMEM);
 570         }
 571
 572         /* Create a dma tag for Common Layer's DMA'able memory (dma_mem). */
 573         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 574                                 sc->alignment,          /* alignment */
 575                                 0,                      /* boundary */
 576                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 577                                 BUS_SPACE_MAXADDR,      /* highaddr */
 578                                 NULL, NULL,             /* filter, filterarg */
 579                                 dma_mem_size,           /* maxsize */
 580                                 1,                      /* nsegments */
 581                                 BUS_SPACE_MAXSIZE,      /* maxsegsize */
 582                                 0,                      /* flags */
 583                                 NULL,                   /* lockfunc */
 584                                 NULL,                   /* lockfuncarg */
 585                                 &sc->cmd_tag            /* tag */)) {
 586                 tw_osli_printf(sc, "error = %d",
 587                         TW_CL_SEVERITY_ERROR_STRING,
 588                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 589                         0x200B,
 590                         "Can't allocate DMA tag for Common Layer's "
 591                         "DMA'able memory",
 592                         ENOMEM);
 593                 return(ENOMEM);
 594         }
 595
 596         if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 597                 BUS_DMA_NOWAIT, &sc->cmd_map)) {
 598                 /* Try a second time. */
 599                 if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 600                         BUS_DMA_NOWAIT, &sc->cmd_map)) {
 601                         tw_osli_printf(sc, "error = %d",
 602                                 TW_CL_SEVERITY_ERROR_STRING,
 603                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 604                                 0x200C,
 605                                 "Can't allocate DMA'able memory for the"
 606                                 "Common Layer",
 607                                 ENOMEM);
 608                         return(ENOMEM);
 609                 }
 610         }
 611
 612         bus_dmamap_load(sc->cmd_tag, sc->cmd_map, sc->dma_mem,
 613                 dma_mem_size, twa_map_load_callback,
 614                 &sc->dma_mem_phys, 0);
 615
 616         /*
 617          * Create a dma tag for data buffers; size will be the maximum
 618          * possible I/O size (128kB).
 619          */
 620         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 621                                 sc->alignment,          /* alignment */
 622                                 0,                      /* boundary */
 623                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 624                                 BUS_SPACE_MAXADDR,      /* highaddr */
 625                                 NULL, NULL,             /* filter, filterarg */
 626                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 627                                 max_sg_elements,        /* nsegments */
 628                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 629                                 BUS_DMA_ALLOCNOW,       /* flags */
 630                                 twa_busdma_lock,        /* lockfunc */
 631                                 sc->io_lock,            /* lockfuncarg */
 632                                 &sc->dma_tag            /* tag */)) {
 633                 tw_osli_printf(sc, "error = %d",
 634                         TW_CL_SEVERITY_ERROR_STRING,
 635                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 636                         0x200F,
 637                         "Can't allocate DMA tag for data buffers",
 638                         ENOMEM);
 639                 return(ENOMEM);
 640         }
 641
 642         /*
 643          * Create a dma tag for ioctl data buffers; size will be the maximum
 644          * possible I/O size (128kB).
 645          */
 646         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 647                                 sc->alignment,          /* alignment */
 648                                 0,                      /* boundary */
 649                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 650                                 BUS_SPACE_MAXADDR,      /* highaddr */
 651                                 NULL, NULL,             /* filter, filterarg */
 652                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 653                                 max_sg_elements,        /* nsegments */
 654                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 655                                 BUS_DMA_ALLOCNOW,       /* flags */
 656                                 twa_busdma_lock,        /* lockfunc */
 657                                 sc->io_lock,            /* lockfuncarg */
 658                                 &sc->ioctl_tag          /* tag */)) {
 659                 tw_osli_printf(sc, "error = %d",
 660                         TW_CL_SEVERITY_ERROR_STRING,
 661                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 662                         0x2010,
 663                         "Can't allocate DMA tag for ioctl data buffers",
 664                         ENOMEM);
 665                 return(ENOMEM);
 666         }
 667
 668         /* Create just one map for all ioctl request data buffers. */
 669         if (bus_dmamap_create(sc->ioctl_tag, 0, &sc->ioctl_map)) {
 670                 tw_osli_printf(sc, "error = %d",
 671                         TW_CL_SEVERITY_ERROR_STRING,
 672                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 673                         0x2011,
 674                         "Can't create ioctl map",
 675                         ENOMEM);
 676                 return(ENOMEM);
 677         }
 678
 679
 680         /* Initialize request queues. */
 681         tw_osli_req_q_init(sc, TW_OSLI_FREE_Q);
 682         tw_osli_req_q_init(sc, TW_OSLI_BUSY_Q);
 683
 684         if ((sc->req_ctx_buf = (struct tw_osli_req_context *)
 685                         malloc((sizeof(struct tw_osli_req_context) *
 686                                 TW_OSLI_MAX_NUM_REQUESTS),
 687                                 TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
 688                 tw_osli_printf(sc, "error = %d",
 689                         TW_CL_SEVERITY_ERROR_STRING,
 690                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 691                         0x2012,
 692                         "Failed to allocate request packets",
 693                         ENOMEM);
 694                 return(ENOMEM);
 695         }
 696         bzero(sc->req_ctx_buf,
 697                 sizeof(struct tw_osli_req_context) * TW_OSLI_MAX_NUM_REQUESTS);
 698
 699         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 700                 req = &(sc->req_ctx_buf[i]);
 701                 req->ctlr = sc;
 702                 if (bus_dmamap_create(sc->dma_tag, 0, &req->dma_map)) {
 703                         tw_osli_printf(sc, "request # = %d, error = %d",
 704                                 TW_CL_SEVERITY_ERROR_STRING,
 705                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 706                                 0x2013,
 707                                 "Can't create dma map",
 708                                 i, ENOMEM);
 709                         return(ENOMEM);
 710                 }
 711
 712                 /* Initialize the ioctl wakeup/ timeout mutex */
 713                 req->ioctl_wake_timeout_lock = &(req->ioctl_wake_timeout_lock_handle);
 714                 mtx_init(req->ioctl_wake_timeout_lock, "tw_ioctl_wake_timeout_lock", NULL, MTX_DEF);
 715
 716                 /* Insert request into the free queue. */
 717                 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 718         }
 719
 720         return(0);
 721 }
 722
 723
 724
 725 /*
 726  * Function name:       tw_osli_free_resources
 727  * Description:         Performs clean-up at the time of going down.
 728  *
 729  * Input:               sc      -- ptr to OSL internal ctlr context
 730  * Output:              None
 731  * Return value:        None
 732  */
 733 static TW_VOID
 734 tw_osli_free_resources(struct twa_softc *sc)
 735 {
 736         struct tw_osli_req_context      *req;
 737         TW_INT32                        error = 0;
 738
 739         tw_osli_dbg_dprintf(3, sc, "entered");
 740
 741         /* Detach from CAM */
 742         tw_osli_cam_detach(sc);
 743
 744         if (sc->req_ctx_buf)
 745                 while ((req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q)) !=
 746                         NULL) {
 747                         mtx_destroy(req->ioctl_wake_timeout_lock);
 748
 749                         if ((error = bus_dmamap_destroy(sc->dma_tag,
 750                                         req->dma_map)))
 751                                 tw_osli_dbg_dprintf(1, sc,
 752                                         "dmamap_destroy(dma) returned %d",
 753                                         error);
 754                 }
 755
 756         if ((sc->ioctl_tag) && (sc->ioctl_map))
 757                 if ((error = bus_dmamap_destroy(sc->ioctl_tag, sc->ioctl_map)))
 758                         tw_osli_dbg_dprintf(1, sc,
 759                                 "dmamap_destroy(ioctl) returned %d", error);
 760
 761         /* Free all memory allocated so far. */
 762         if (sc->req_ctx_buf)
 763                 free(sc->req_ctx_buf, TW_OSLI_MALLOC_CLASS);
 764
 765         if (sc->non_dma_mem)
 766                 free(sc->non_dma_mem, TW_OSLI_MALLOC_CLASS);
 767
 768         if (sc->dma_mem) {
 769                 bus_dmamap_unload(sc->cmd_tag, sc->cmd_map);
 770                 bus_dmamem_free(sc->cmd_tag, sc->dma_mem,
 771                         sc->cmd_map);
 772         }
 773         if (sc->cmd_tag)
 774                 if ((error = bus_dma_tag_destroy(sc->cmd_tag)))
 775                         tw_osli_dbg_dprintf(1, sc,
 776                                 "dma_tag_destroy(cmd) returned %d", error);
 777
 778         if (sc->dma_tag)
 779                 if ((error = bus_dma_tag_destroy(sc->dma_tag)))
 780                         tw_osli_dbg_dprintf(1, sc,
 781                                 "dma_tag_destroy(dma) returned %d", error);
 782
 783         if (sc->ioctl_tag)
 784                 if ((error = bus_dma_tag_destroy(sc->ioctl_tag)))
 785                         tw_osli_dbg_dprintf(1, sc,
 786                                 "dma_tag_destroy(ioctl) returned %d", error);
 787
 788         if (sc->parent_tag)
 789                 if ((error = bus_dma_tag_destroy(sc->parent_tag)))
 790                         tw_osli_dbg_dprintf(1, sc,
 791                                 "dma_tag_destroy(parent) returned %d", error);
 792
 793
 794         /* Disconnect the interrupt handler. */
 795         if ((error = twa_teardown_intr(sc)))
 796                         tw_osli_dbg_dprintf(1, sc,
 797                                 "teardown_intr returned %d", error);
 798
 799         if (sc->irq_res != NULL)
 800                 if ((error = bus_release_resource(sc->bus_dev,
 801                                 SYS_RES_IRQ, sc->irq_res_id, sc->irq_res)))
 802                         tw_osli_dbg_dprintf(1, sc,
 803                                 "release_resource(irq) returned %d", error);
 804
 805
 806         /* Release the register window mapping. */
 807         if (sc->reg_res != NULL)
 808                 if ((error = bus_release_resource(sc->bus_dev,
 809                                 SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res)))
 810                         tw_osli_dbg_dprintf(1, sc,
 811                                 "release_resource(io) returned %d", error);
 812
 813
 814         /* Destroy the control device. */
 815         if (sc->ctrl_dev != (struct cdev *)NULL)
 816                 destroy_dev(sc->ctrl_dev);
 817
 818         if ((error = sysctl_ctx_free(&sc->sysctl_ctxt)))
 819                 tw_osli_dbg_dprintf(1, sc,
 820                         "sysctl_ctx_free returned %d", error);
 821
 822 }
 823
 824
 825
 826 /*
 827  * Function name:       twa_detach
 828  * Description:         Called when the controller is being detached from
 829  *                      the pci bus.
 830  *
 831  * Input:               dev     -- bus device corresponding to the ctlr
 832  * Output:              None
 833  * Return value:        0       -- success
 834  *                      non-zero-- failure
 835  */
 836 static TW_INT32
 837 twa_detach(device_t dev)
 838 {
 839         struct twa_softc        *sc = device_get_softc(dev);
 840         TW_INT32                error;
 841
 842         tw_osli_dbg_dprintf(3, sc, "entered");
 843
 844         error = EBUSY;
 845         if (sc->open) {
 846                 tw_osli_printf(sc, "error = %d",
 847                         TW_CL_SEVERITY_ERROR_STRING,
 848                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 849                         0x2014,
 850                         "Device open",
 851                         error);
 852                 goto out;
 853         }
 854
 855         /* Shut the controller down. */
 856         if ((error = twa_shutdown(dev)))
 857                 goto out;
 858
 859         /* Free all resources associated with this controller. */
 860         tw_osli_free_resources(sc);
 861         error = 0;
 862
 863 out:
 864         return(error);
 865 }
 866
 867
 868
 869 /*
 870  * Function name:       twa_shutdown
 871  * Description:         Called at unload/shutdown time.  Lets the controller
 872  *                      know that we are going down.
 873  *
 874  * Input:               dev     -- bus device corresponding to the ctlr
 875  * Output:              None
 876  * Return value:        0       -- success
 877  *                      non-zero-- failure
 878  */
 879 static TW_INT32
 880 twa_shutdown(device_t dev)
 881 {
 882         struct twa_softc        *sc = device_get_softc(dev);
 883         TW_INT32                error = 0;
 884
 885         tw_osli_dbg_dprintf(3, sc, "entered");
 886
 887         /* Disconnect interrupts. */
 888         error = twa_teardown_intr(sc);
 889
 890         /* Stop watchdog task. */
 891         callout_drain(&(sc->watchdog_callout[0]));
 892         callout_drain(&(sc->watchdog_callout[1]));
 893
 894         /* Disconnect from the controller. */
 895         if ((error = tw_cl_shutdown_ctlr(&(sc->ctlr_handle), 0))) {
 896                 tw_osli_printf(sc, "error = %d",
 897                         TW_CL_SEVERITY_ERROR_STRING,
 898                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 899                         0x2015,
 900                         "Failed to shutdown Common Layer/controller",
 901                         error);
 902         }
 903         return(error);
 904 }
 905
 906
 907
 908 /*
 909  * Function name:       twa_busdma_lock
 910  * Description:         Function to provide synchronization during busdma_swi.
 911  *
 912  * Input:               lock_arg -- lock mutex sent as argument
 913  *                      op -- operation (lock/unlock) expected of the function
 914  * Output:              None
 915  * Return value:        None
 916  */
 917 TW_VOID
 918 twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op)
 919 {
 920         struct mtx      *lock;
 921
 922         lock = (struct mtx *)lock_arg;
 923         switch (op) {
 924         case BUS_DMA_LOCK:
 925                 mtx_lock_spin(lock);
 926                 break;
 927
 928         case BUS_DMA_UNLOCK:
 929                 mtx_unlock_spin(lock);
 930                 break;
 931
 932         default:
 933                 panic("Unknown operation 0x%x for twa_busdma_lock!", op);
 934         }
 935 }
 936
 937
 938 /*
 939  * Function name:       twa_pci_intr
 940  * Description:         Interrupt handler.  Wrapper for twa_interrupt.
 941  *
 942  * Input:               arg     -- ptr to OSL internal ctlr context
 943  * Output:              None
 944  * Return value:        None
 945  */
 946 static TW_VOID
 947 twa_pci_intr(TW_VOID *arg)
 948 {
 949         struct twa_softc        *sc = (struct twa_softc *)arg;
 950
 951         tw_osli_dbg_dprintf(10, sc, "entered");
 952         tw_cl_interrupt(&(sc->ctlr_handle));
 953 }
 954
 955
 956 /*
 957  * Function name:       tw_osli_fw_passthru
 958  * Description:         Builds a fw passthru cmd pkt, and submits it to CL.
 959  *
 960  * Input:               sc      -- ptr to OSL internal ctlr context
 961  *                      buf     -- ptr to ioctl pkt understood by CL
 962  * Output:              None
 963  * Return value:        0       -- success
 964  *                      non-zero-- failure
 965  */
 966 TW_INT32
 967 tw_osli_fw_passthru(struct twa_softc *sc, TW_INT8 *buf)
 968 {
 969         struct tw_osli_req_context              *req;
 970         struct tw_osli_ioctl_no_data_buf        *user_buf =
 971                 (struct tw_osli_ioctl_no_data_buf *)buf;
 972         TW_TIME                                 end_time;
 973         TW_UINT32                               timeout = 60;
 974         TW_UINT32                               data_buf_size_adjusted;
 975         struct tw_cl_req_packet                 *req_pkt;
 976         struct tw_cl_passthru_req_packet        *pt_req;
 977         TW_INT32                                error;
 978
 979         tw_osli_dbg_dprintf(5, sc, "ioctl: passthru");
 980
 981         if ((req = tw_osli_get_request(sc)) == NULL)
 982                 return(EBUSY);
 983
 984         req->req_handle.osl_req_ctxt = req;
 985         req->orig_req = buf;
 986         req->flags |= TW_OSLI_REQ_FLAGS_PASSTHRU;
 987
 988         req_pkt = &(req->req_pkt);
 989         req_pkt->status = 0;
 990         req_pkt->tw_osl_callback = tw_osl_complete_passthru;
 991         /* Let the Common Layer retry the request on cmd queue full. */
 992         req_pkt->flags |= TW_CL_REQ_RETRY_ON_BUSY;
 993
 994         pt_req = &(req_pkt->gen_req_pkt.pt_req);
 995         /*
 996          * Make sure that the data buffer sent to firmware is a
 997          * 512 byte multiple in size.
 998          */
 999         data_buf_size_adjusted =
1000                 (user_buf->driver_pkt.buffer_length +
1001                 (sc->sg_size_factor - 1)) & ~(sc->sg_size_factor - 1);
1002         if ((req->length = data_buf_size_adjusted)) {
1003                 if ((req->data = malloc(data_buf_size_adjusted,
1004                         TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
1005                         error = ENOMEM;
1006                         tw_osli_printf(sc, "error = %d",
1007                                 TW_CL_SEVERITY_ERROR_STRING,
1008                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1009                                 0x2016,
1010                                 "Could not alloc mem for "
1011                                 "fw_passthru data_buf",
1012                                 error);
1013                         goto fw_passthru_err;
1014                 }
1015                 /* Copy the payload. */
1016                 if ((error = copyin((TW_VOID *)(user_buf->pdata),
1017                         req->data,
1018                         user_buf->driver_pkt.buffer_length)) != 0) {
1019                         tw_osli_printf(sc, "error = %d",
1020                                 TW_CL_SEVERITY_ERROR_STRING,
1021                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1022                                 0x2017,
1023                                 "Could not copyin fw_passthru data_buf",
1024                                 error);
1025                         goto fw_passthru_err;
1026                 }
1027                 pt_req->sgl_entries = 1; /* will be updated during mapping */
1028                 req->flags |= (TW_OSLI_REQ_FLAGS_DATA_IN |
1029                         TW_OSLI_REQ_FLAGS_DATA_OUT);
1030         } else
1031                 pt_req->sgl_entries = 0; /* no payload */
1032
1033         pt_req->cmd_pkt = (TW_VOID *)(&(user_buf->cmd_pkt));
1034         pt_req->cmd_pkt_length = sizeof(struct tw_cl_command_packet);
1035
1036         if ((error = tw_osli_map_request(req)))
1037                 goto fw_passthru_err;
1038
1039         end_time = tw_osl_get_local_time() + timeout;
1040         while (req->state != TW_OSLI_REQ_STATE_COMPLETE) {
1041                 mtx_lock(req->ioctl_wake_timeout_lock);
1042                 req->flags |= TW_OSLI_REQ_FLAGS_SLEEPING;
1043
1044                 error = mtx_sleep(req, req->ioctl_wake_timeout_lock, 0,
1045                             "twa_passthru", timeout*hz);
1046                 mtx_unlock(req->ioctl_wake_timeout_lock);
1047
1048                 if (!(req->flags & TW_OSLI_REQ_FLAGS_SLEEPING))
1049                         error = 0;
1050                 req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
1051
1052                 if (! error) {
1053                         if (((error = req->error_code)) ||
1054                                 ((error = (req->state !=
1055                                 TW_OSLI_REQ_STATE_COMPLETE))) ||
1056                                 ((error = req_pkt->status)))
1057                                 goto fw_passthru_err;
1058                         break;
1059                 }
1060
1061                 if (req_pkt->status) {
1062                         error = req_pkt->status;
1063                         goto fw_passthru_err;
1064                 }
1065
1066                 if (error == EWOULDBLOCK) {
1067                         /* Time out! */
1068                         if ((!(req->error_code))                       &&
1069                             (req->state == TW_OSLI_REQ_STATE_COMPLETE) &&
1070                             (!(req_pkt->status))                          ) {
1071 #ifdef    TW_OSL_DEBUG
1072                                 tw_osli_printf(sc, "request = %p",
1073                                         TW_CL_SEVERITY_ERROR_STRING,
1074                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1075                                         0x7777,
1076                                         "FALSE Passthru timeout!",
1077                                         req);
1078 #endif /* TW_OSL_DEBUG */
1079                                 error = 0; /* False error */
1080                                 break;
1081                         }
1082                         if (!(tw_cl_is_reset_needed(&(req->ctlr->ctlr_handle)))) {
1083 #ifdef    TW_OSL_DEBUG
1084                                 tw_osli_printf(sc, "request = %p",
1085                                         TW_CL_SEVERITY_ERROR_STRING,
1086                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1087                                         0x2018,
1088                                         "Passthru request timed out!",
1089                                         req);
1090 #else  /* TW_OSL_DEBUG */
1091                         device_printf((sc)->bus_dev, "Passthru request timed out!\n");
1092 #endif /* TW_OSL_DEBUG */
1093                                 tw_cl_reset_ctlr(&(req->ctlr->ctlr_handle));
1094                         }
1095
1096                         error = 0;
1097                         end_time = tw_osl_get_local_time() + timeout;
1098                         continue;
1099                         /*
1100                          * Don't touch req after a reset.  It (and any
1101                          * associated data) will be
1102                          * unmapped by the callback.
1103                          */
1104                 }
1105                 /*
1106                  * Either the request got completed, or we were woken up by a
1107                  * signal.  Calculate the new timeout, in case it was the latter.
1108                  */
1109                 timeout = (end_time - tw_osl_get_local_time());
1110         } /* End of while loop */
1111
1112         /* If there was a payload, copy it back. */
1113         if ((!error) && (req->length))
1114                 if ((error = copyout(req->data, user_buf->pdata,
1115                         user_buf->driver_pkt.buffer_length)))
1116                         tw_osli_printf(sc, "error = %d",
1117                                 TW_CL_SEVERITY_ERROR_STRING,
1118                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1119                                 0x2019,
1120                                 "Could not copyout fw_passthru data_buf",
1121                                 error);
1122
1123 fw_passthru_err:
1124
1125         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1126                 error = EBUSY;
1127
1128         user_buf->driver_pkt.os_status = error;
1129         /* Free resources. */
1130         if (req->data)
1131                 free(req->data, TW_OSLI_MALLOC_CLASS);
1132         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1133         return(error);
1134 }
1135
1136
1137
1138 /*
1139  * Function name:       tw_osl_complete_passthru
1140  * Description:         Called to complete passthru requests.
1141  *
1142  * Input:               req_handle      -- ptr to request handle
1143  * Output:              None
1144  * Return value:        None
1145  */
1146 TW_VOID
1147 tw_osl_complete_passthru(struct tw_cl_req_handle *req_handle)
1148 {
1149         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
1150         struct tw_cl_req_packet         *req_pkt =
1151                 (struct tw_cl_req_packet *)(&req->req_pkt);
1152         struct twa_softc                *sc = req->ctlr;
1153
1154         tw_osli_dbg_dprintf(5, sc, "entered");
1155
1156         if (req->state != TW_OSLI_REQ_STATE_BUSY) {
1157                 tw_osli_printf(sc, "request = %p, status = %d",
1158                         TW_CL_SEVERITY_ERROR_STRING,
1159                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1160                         0x201B,
1161                         "Unposted command completed!!",
1162                         req, req->state);
1163         }
1164
1165         /*
1166          * Remove request from the busy queue.  Just mark it complete.
1167          * There's no need to move it into the complete queue as we are
1168          * going to be done with it right now.
1169          */
1170         req->state = TW_OSLI_REQ_STATE_COMPLETE;
1171         tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q);
1172
1173         tw_osli_unmap_request(req);
1174
1175         /*
1176          * Don't do a wake up if there was an error even before the request
1177          * was sent down to the Common Layer, and we hadn't gotten an
1178          * EINPROGRESS.  The request originator will then be returned an
1179          * error, and he can do the clean-up.
1180          */
1181         if ((req->error_code) && (!(req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)))
1182                 return;
1183
1184         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1185                 if (req->flags & TW_OSLI_REQ_FLAGS_SLEEPING) {
1186                         /* Wake up the sleeping command originator. */
1187                         tw_osli_dbg_dprintf(5, sc,
1188                                 "Waking up originator of request %p", req);
1189                         req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
1190                         wakeup_one(req);
1191                 } else {
1192                         /*
1193                          * If the request completed even before mtx_sleep
1194                          * was called, simply return.
1195                          */
1196                         if (req->flags & TW_OSLI_REQ_FLAGS_MAPPED)
1197                                 return;
1198
1199                         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1200                                 return;
1201
1202                         tw_osli_printf(sc, "request = %p",
1203                                 TW_CL_SEVERITY_ERROR_STRING,
1204                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1205                                 0x201C,
1206                                 "Passthru callback called, "
1207                                 "and caller not sleeping",
1208                                 req);
1209                 }
1210         } else {
1211                 tw_osli_printf(sc, "request = %p",
1212                         TW_CL_SEVERITY_ERROR_STRING,
1213                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1214                         0x201D,
1215                         "Passthru callback called for non-passthru request",
1216                         req);
1217         }
1218 }
1219
1220
1221
1222 /*
1223  * Function name:       tw_osli_get_request
1224  * Description:         Gets a request pkt from the free queue.
1225  *
1226  * Input:               sc      -- ptr to OSL internal ctlr context
1227  * Output:              None
1228  * Return value:        ptr to request pkt      -- success
1229  *                      NULL                    -- failure
1230  */
1231 struct tw_osli_req_context *
1232 tw_osli_get_request(struct twa_softc *sc)
1233 {
1234         struct tw_osli_req_context      *req;
1235
1236         tw_osli_dbg_dprintf(4, sc, "entered");
1237
1238         /* Get a free request packet. */
1239         req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q);
1240
1241         /* Initialize some fields to their defaults. */
1242         if (req) {
1243                 req->req_handle.osl_req_ctxt = NULL;
1244                 req->req_handle.cl_req_ctxt = NULL;
1245                 req->req_handle.is_io = 0;
1246                 req->data = NULL;
1247                 req->length = 0;
1248                 req->deadline = 0;
1249                 req->real_data = NULL;
1250                 req->real_length = 0;
1251                 req->state = TW_OSLI_REQ_STATE_INIT;/* req being initialized */
1252                 req->flags = 0;
1253                 req->error_code = 0;
1254                 req->orig_req = NULL;
1255
1256                 bzero(&(req->req_pkt), sizeof(struct tw_cl_req_packet));
1257
1258         }
1259         return(req);
1260 }
1261
1262
1263
1264 /*
1265  * Function name:       twa_map_load_data_callback
1266  * Description:         Callback of bus_dmamap_load for the buffer associated
1267  *                      with data.  Updates the cmd pkt (size/sgl_entries
1268  *                      fields, as applicable) to reflect the number of sg
1269  *                      elements.
1270  *
1271  * Input:               arg     -- ptr to OSL internal request context
1272  *                      segs    -- ptr to a list of segment descriptors
1273  *                      nsegments--# of segments
1274  *                      error   -- 0 if no errors encountered before callback,
1275  *                                 non-zero if errors were encountered
1276  * Output:              None
1277  * Return value:        None
1278  */
1279 static TW_VOID
1280 twa_map_load_data_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1281         TW_INT32 nsegments, TW_INT32 error)
1282 {
1283         struct tw_osli_req_context      *req =
1284                 (struct tw_osli_req_context *)arg;
1285         struct twa_softc                *sc = req->ctlr;
1286         struct tw_cl_req_packet         *req_pkt = &(req->req_pkt);
1287
1288         tw_osli_dbg_dprintf(10, sc, "entered");
1289
1290         if (error == EINVAL) {
1291                 req->error_code = error;
1292                 return;
1293         }
1294
1295         /* Mark the request as currently being processed. */
1296         req->state = TW_OSLI_REQ_STATE_BUSY;
1297         /* Move the request into the busy queue. */
1298         tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1299
1300         req->flags |= TW_OSLI_REQ_FLAGS_MAPPED;
1301
1302         if (error == EFBIG) {
1303                 req->error_code = error;
1304                 goto out;
1305         }
1306
1307         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1308                 struct tw_cl_passthru_req_packet        *pt_req;
1309
1310                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1311                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1312                                 BUS_DMASYNC_PREREAD);
1313
1314                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1315                         /*
1316                          * If we're using an alignment buffer, and we're
1317                          * writing data, copy the real data out.
1318                          */
1319                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1320                                 bcopy(req->real_data, req->data, req->real_length);
1321                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1322                                 BUS_DMASYNC_PREWRITE);
1323                 }
1324
1325                 pt_req = &(req_pkt->gen_req_pkt.pt_req);
1326                 pt_req->sg_list = (TW_UINT8 *)segs;
1327                 pt_req->sgl_entries += (nsegments - 1);
1328                 error = tw_cl_fw_passthru(&(sc->ctlr_handle), req_pkt,
1329                         &(req->req_handle));
1330         } else {
1331                 struct tw_cl_scsi_req_packet    *scsi_req;
1332
1333                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1334                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1335                                 BUS_DMASYNC_PREREAD);
1336
1337                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1338                         /*
1339                          * If we're using an alignment buffer, and we're
1340                          * writing data, copy the real data out.
1341                          */
1342                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1343                                 bcopy(req->real_data, req->data, req->real_length);
1344                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1345                                 BUS_DMASYNC_PREWRITE);
1346                 }
1347
1348                 scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
1349                 scsi_req->sg_list = (TW_UINT8 *)segs;
1350                 scsi_req->sgl_entries += (nsegments - 1);
1351                 error = tw_cl_start_io(&(sc->ctlr_handle), req_pkt,
1352                         &(req->req_handle));
1353         }
1354
1355 out:
1356         if (error) {
1357                 req->error_code = error;
1358                 req_pkt->tw_osl_callback(&(req->req_handle));
1359                 /*
1360                  * If the caller had been returned EINPROGRESS, and he has
1361                  * registered a callback for handling completion, the callback
1362                  * will never get called because we were unable to submit the
1363                  * request.  So, free up the request right here.
1364                  */
1365                 if (req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)
1366                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1367         }
1368 }
1369
1370
1371
1372 /*
1373  * Function name:       twa_map_load_callback
1374  * Description:         Callback of bus_dmamap_load for the buffer associated
1375  *                      with a cmd pkt.
1376  *
1377  * Input:               arg     -- ptr to variable to hold phys addr
1378  *                      segs    -- ptr to a list of segment descriptors
1379  *                      nsegments--# of segments
1380  *                      error   -- 0 if no errors encountered before callback,
1381  *                                 non-zero if errors were encountered
1382  * Output:              None
1383  * Return value:        None
1384  */
1385 static TW_VOID
1386 twa_map_load_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1387         TW_INT32 nsegments, TW_INT32 error)
1388 {
1389         *((bus_addr_t *)arg) = segs[0].ds_addr;
1390 }
1391
1392
1393
1394 /*
1395  * Function name:       tw_osli_map_request
1396  * Description:         Maps a cmd pkt and data associated with it, into
1397  *                      DMA'able memory.
1398  *
1399  * Input:               req     -- ptr to request pkt
1400  * Output:              None
1401  * Return value:        0       -- success
1402  *                      non-zero-- failure
1403  */
1404 TW_INT32
1405 tw_osli_map_request(struct tw_osli_req_context *req)
1406 {
1407         struct twa_softc        *sc = req->ctlr;
1408         TW_INT32                error = 0;
1409
1410         tw_osli_dbg_dprintf(10, sc, "entered");
1411
1412         /* If the command involves data, map that too. */
1413         if (req->data != NULL) {
1414                 /*
1415                  * It's sufficient for the data pointer to be 4-byte aligned
1416                  * to work with 9000.  However, if 4-byte aligned addresses
1417                  * are passed to bus_dmamap_load, we can get back sg elements
1418                  * that are not 512-byte multiples in size.  So, we will let
1419                  * only those buffers that are 512-byte aligned to pass
1420                  * through, and bounce the rest, so as to make sure that we
1421                  * always get back sg elements that are 512-byte multiples
1422                  * in size.
1423                  */
1424                 if (((vm_offset_t)req->data % sc->sg_size_factor) ||
1425                         (req->length % sc->sg_size_factor)) {
1426                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED;
1427                         /* Save original data pointer and length. */
1428                         req->real_data = req->data;
1429                         req->real_length = req->length;
1430                         req->length = (req->length +
1431                                 (sc->sg_size_factor - 1)) &
1432                                 ~(sc->sg_size_factor - 1);
1433                         req->data = malloc(req->length, TW_OSLI_MALLOC_CLASS,
1434                                         M_NOWAIT);
1435                         if (req->data == NULL) {
1436                                 tw_osli_printf(sc, "error = %d",
1437                                         TW_CL_SEVERITY_ERROR_STRING,
1438                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1439                                         0x201E,
1440                                         "Failed to allocate memory "
1441                                         "for bounce buffer",
1442                                         ENOMEM);
1443                                 /* Restore original data pointer and length. */
1444                                 req->data = req->real_data;
1445                                 req->length = req->real_length;
1446                                 return(ENOMEM);
1447                         }
1448                 }
1449
1450                 /*
1451                  * Map the data buffer into bus space and build the SG list.
1452                  */
1453                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1454                         /* Lock against multiple simultaneous ioctl calls. */
1455                         mtx_lock_spin(sc->io_lock);
1456                         error = bus_dmamap_load(sc->ioctl_tag, sc->ioctl_map,
1457                                 req->data, req->length,
1458                                 twa_map_load_data_callback, req,
1459                                 BUS_DMA_WAITOK);
1460                         mtx_unlock_spin(sc->io_lock);
1461                 } else if (req->flags & TW_OSLI_REQ_FLAGS_CCB) {
1462                         error = bus_dmamap_load_ccb(sc->dma_tag, req->dma_map,
1463                                 req->orig_req, twa_map_load_data_callback, req,
1464                                 BUS_DMA_WAITOK);
1465                 } else {
1466                         /*
1467                          * There's only one CAM I/O thread running at a time.
1468                          * So, there's no need to hold the io_lock.
1469                          */
1470                         error = bus_dmamap_load(sc->dma_tag, req->dma_map,
1471                                 req->data, req->length,
1472                                 twa_map_load_data_callback, req,
1473                                 BUS_DMA_WAITOK);
1474                 }
1475
1476                 if (!error)
1477                         error = req->error_code;
1478                 else {
1479                         if (error == EINPROGRESS) {
1480                                 /*
1481                                  * Specifying sc->io_lock as the lockfuncarg
1482                                  * in ...tag_create should protect the access
1483                                  * of ...FLAGS_MAPPED from the callback.
1484                                  */
1485                                 mtx_lock_spin(sc->io_lock);
1486                                 if (!(req->flags & TW_OSLI_REQ_FLAGS_MAPPED))
1487                                         req->flags |= TW_OSLI_REQ_FLAGS_IN_PROGRESS;
1488                                 tw_osli_disallow_new_requests(sc, &(req->req_handle));
1489                                 mtx_unlock_spin(sc->io_lock);
1490                                 error = 0;
1491                         } else {
1492                                 tw_osli_printf(sc, "error = %d",
1493                                         TW_CL_SEVERITY_ERROR_STRING,
1494                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1495                                         0x9999,
1496                                         "Failed to map DMA memory "
1497                                         "for I/O request",
1498                                         error);
1499                                 req->flags |= TW_OSLI_REQ_FLAGS_FAILED;
1500                                 /* Free alignment buffer if it was used. */
1501                                 if (req->flags &
1502                                         TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1503                                         free(req->data, TW_OSLI_MALLOC_CLASS);
1504                                         /*
1505                                          * Restore original data pointer
1506                                          * and length.
1507                                          */
1508                                         req->data = req->real_data;
1509                                         req->length = req->real_length;
1510                                 }
1511                         }
1512                 }
1513
1514         } else {
1515                 /* Mark the request as currently being processed. */
1516                 req->state = TW_OSLI_REQ_STATE_BUSY;
1517                 /* Move the request into the busy queue. */
1518                 tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1519                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU)
1520                         error = tw_cl_fw_passthru(&sc->ctlr_handle,
1521                                         &(req->req_pkt), &(req->req_handle));
1522                 else
1523                         error = tw_cl_start_io(&sc->ctlr_handle,
1524                                         &(req->req_pkt), &(req->req_handle));
1525                 if (error) {
1526                         req->error_code = error;
1527                         req->req_pkt.tw_osl_callback(&(req->req_handle));
1528                 }
1529         }
1530         return(error);
1531 }
1532
1533
1534
1535 /*
1536  * Function name:       tw_osli_unmap_request
1537  * Description:         Undoes the mapping done by tw_osli_map_request.
1538  *
1539  * Input:               req     -- ptr to request pkt
1540  * Output:              None
1541  * Return value:        None
1542  */
1543 TW_VOID
1544 tw_osli_unmap_request(struct tw_osli_req_context *req)
1545 {
1546         struct twa_softc        *sc = req->ctlr;
1547
1548         tw_osli_dbg_dprintf(10, sc, "entered");
1549
1550         /* If the command involved data, unmap that too. */
1551         if (req->data != NULL) {
1552                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1553                         /* Lock against multiple simultaneous ioctl calls. */
1554                         mtx_lock_spin(sc->io_lock);
1555
1556                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1557                                 bus_dmamap_sync(sc->ioctl_tag,
1558                                         sc->ioctl_map, BUS_DMASYNC_POSTREAD);
1559
1560                                 /*
1561                                  * If we are using a bounce buffer, and we are
1562                                  * reading data, copy the real data in.
1563                                  */
1564                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1565                                         bcopy(req->data, req->real_data,
1566                                                 req->real_length);
1567                         }
1568
1569                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1570                                 bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1571                                         BUS_DMASYNC_POSTWRITE);
1572
1573                         bus_dmamap_unload(sc->ioctl_tag, sc->ioctl_map);
1574
1575                         mtx_unlock_spin(sc->io_lock);
1576                 } else {
1577                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1578                                 bus_dmamap_sync(sc->dma_tag,
1579                                         req->dma_map, BUS_DMASYNC_POSTREAD);
1580
1581                                 /*
1582                                  * If we are using a bounce buffer, and we are
1583                                  * reading data, copy the real data in.
1584                                  */
1585                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1586                                         bcopy(req->data, req->real_data,
1587                                                 req->real_length);
1588                         }
1589                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1590                                 bus_dmamap_sync(sc->dma_tag, req->dma_map,
1591                                         BUS_DMASYNC_POSTWRITE);
1592
1593                         bus_dmamap_unload(sc->dma_tag, req->dma_map);
1594                 }
1595         }
1596
1597         /* Free alignment buffer if it was used. */
1598         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1599                 free(req->data, TW_OSLI_MALLOC_CLASS);
1600                 /* Restore original data pointer and length. */
1601                 req->data = req->real_data;
1602                 req->length = req->real_length;
1603         }
1604 }
1605
1606
1607
1608 #ifdef TW_OSL_DEBUG
1609
1610 TW_VOID twa_report_stats(TW_VOID);
1611 TW_VOID twa_reset_stats(TW_VOID);
1612 TW_VOID tw_osli_print_ctlr_stats(struct twa_softc *sc);
1613 TW_VOID twa_print_req_info(struct tw_osli_req_context *req);
1614
1615
1616 /*
1617  * Function name:       twa_report_stats
1618  * Description:         For being called from ddb.  Calls functions that print
1619  *                      OSL and CL internal stats for the controller.
1620  *
1621  * Input:               None
1622  * Output:              None
1623  * Return value:        None
1624  */
1625 TW_VOID
1626 twa_report_stats(TW_VOID)
1627 {
1628         struct twa_softc        *sc;
1629         TW_INT32                i;
1630
1631         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1632                 tw_osli_print_ctlr_stats(sc);
1633                 tw_cl_print_ctlr_stats(&sc->ctlr_handle);
1634         }
1635 }
1636
1637
1638
1639 /*
1640  * Function name:       tw_osli_print_ctlr_stats
1641  * Description:         For being called from ddb.  Prints OSL controller stats
1642  *
1643  * Input:               sc      -- ptr to OSL internal controller context
1644  * Output:              None
1645  * Return value:        None
1646  */
1647 TW_VOID
1648 tw_osli_print_ctlr_stats(struct twa_softc *sc)
1649 {
1650         twa_printf(sc, "osl_ctlr_ctxt = %p\n", sc);
1651         twa_printf(sc, "OSLq type  current  max\n");
1652         twa_printf(sc, "free      %04d     %04d\n",
1653                 sc->q_stats[TW_OSLI_FREE_Q].cur_len,
1654                 sc->q_stats[TW_OSLI_FREE_Q].max_len);
1655         twa_printf(sc, "busy      %04d     %04d\n",
1656                 sc->q_stats[TW_OSLI_BUSY_Q].cur_len,
1657                 sc->q_stats[TW_OSLI_BUSY_Q].max_len);
1658 }
1659
1660
1661
1662 /*
1663  * Function name:       twa_print_req_info
1664  * Description:         For being called from ddb.  Calls functions that print
1665  *                      OSL and CL internal details for the request.
1666  *
1667  * Input:               req     -- ptr to OSL internal request context
1668  * Output:              None
1669  * Return value:        None
1670  */
1671 TW_VOID
1672 twa_print_req_info(struct tw_osli_req_context *req)
1673 {
1674         struct twa_softc        *sc = req->ctlr;
1675
1676         twa_printf(sc, "OSL details for request:\n");
1677         twa_printf(sc, "osl_req_ctxt = %p, cl_req_ctxt = %p\n"
1678                 "data = %p, length = 0x%x, real_data = %p, real_length = 0x%x\n"
1679                 "state = 0x%x, flags = 0x%x, error = 0x%x, orig_req = %p\n"
1680                 "next_req = %p, prev_req = %p, dma_map = %p\n",
1681                 req->req_handle.osl_req_ctxt, req->req_handle.cl_req_ctxt,
1682                 req->data, req->length, req->real_data, req->real_length,
1683                 req->state, req->flags, req->error_code, req->orig_req,
1684                 req->link.next, req->link.prev, req->dma_map);
1685         tw_cl_print_req_info(&(req->req_handle));
1686 }
1687
1688
1689
1690 /*
1691  * Function name:       twa_reset_stats
1692  * Description:         For being called from ddb.
1693  *                      Resets some OSL controller stats.
1694  *
1695  * Input:               None
1696  * Output:              None
1697  * Return value:        None
1698  */
1699 TW_VOID
1700 twa_reset_stats(TW_VOID)
1701 {
1702         struct twa_softc        *sc;
1703         TW_INT32                i;
1704
1705         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1706                 sc->q_stats[TW_OSLI_FREE_Q].max_len = 0;
1707                 sc->q_stats[TW_OSLI_BUSY_Q].max_len = 0;
1708                 tw_cl_reset_stats(&sc->ctlr_handle);
1709         }
1710 }
1711
1712 #endif /* TW_OSL_DEBUG */