sys/dev/twa/tw_osl_freebsd.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2004-07 Applied Micro Circuits Corporation.
   5  * Copyright (c) 2004-05 Vinod Kashyap.
   6  * Copyright (c) 2000 Michael Smith
   7  * Copyright (c) 2000 BSDi
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 /*
  36  * AMCC'S 3ware driver for 9000 series storage controllers.
  37  *
  38  * Author: Vinod Kashyap
  39  * Modifications by: Adam Radford
  40  * Modifications by: Manjunath Ranganathaiah
  41  */
  42
  43
  44 /*
  45  * FreeBSD specific functions not related to CAM, and other
  46  * miscellaneous functions.
  47  */
  48
  49
  50 #include <dev/twa/tw_osl_includes.h>
  51 #include <dev/twa/tw_cl_fwif.h>
  52 #include <dev/twa/tw_cl_ioctl.h>
  53 #include <dev/twa/tw_osl_ioctl.h>
  54
  55 #ifdef TW_OSL_DEBUG
  56 TW_INT32        TW_DEBUG_LEVEL_FOR_OSL = TW_OSL_DEBUG;
  57 TW_INT32        TW_OSL_DEBUG_LEVEL_FOR_CL = TW_OSL_DEBUG;
  58 #endif /* TW_OSL_DEBUG */
  59
  60 static MALLOC_DEFINE(TW_OSLI_MALLOC_CLASS, "twa_commands", "twa commands");
  61
  62
  63 static  d_open_t                twa_open;
  64 static  d_close_t               twa_close;
  65 static  d_ioctl_t               twa_ioctl;
  66
  67 static struct cdevsw twa_cdevsw = {
  68         .d_version =    D_VERSION,
  69         .d_open =       twa_open,
  70         .d_close =      twa_close,
  71         .d_ioctl =      twa_ioctl,
  72         .d_name =       "twa",
  73 };
  74
  75 static devclass_t       twa_devclass;
  76
  77
  78 /*
  79  * Function name:       twa_open
  80  * Description:         Called when the controller is opened.
  81  *                      Simply marks the controller as open.
  82  *
  83  * Input:               dev     -- control device corresponding to the ctlr
  84  *                      flags   -- mode of open
  85  *                      fmt     -- device type (character/block etc.)
  86  *                      proc    -- current process
  87  * Output:              None
  88  * Return value:        0       -- success
  89  *                      non-zero-- failure
  90  */
  91 static TW_INT32
  92 twa_open(struct cdev *dev, TW_INT32 flags, TW_INT32 fmt, struct thread *proc)
  93 {
  94         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
  95
  96         tw_osli_dbg_dprintf(5, sc, "entered");
  97         sc->open = TW_CL_TRUE;
  98         return(0);
  99 }
 100
 101
 102
 103 /*
 104  * Function name:       twa_close
 105  * Description:         Called when the controller is closed.
 106  *                      Simply marks the controller as not open.
 107  *
 108  * Input:               dev     -- control device corresponding to the ctlr
 109  *                      flags   -- mode of corresponding open
 110  *                      fmt     -- device type (character/block etc.)
 111  *                      proc    -- current process
 112  * Output:              None
 113  * Return value:        0       -- success
 114  *                      non-zero-- failure
 115  */
 116 static TW_INT32
 117 twa_close(struct cdev *dev, TW_INT32 flags, TW_INT32 fmt, struct thread *proc)
 118 {
 119         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 120
 121         tw_osli_dbg_dprintf(5, sc, "entered");
 122         sc->open = TW_CL_FALSE;
 123         return(0);
 124 }
 125
 126
 127
 128 /*
 129  * Function name:       twa_ioctl
 130  * Description:         Called when an ioctl is posted to the controller.
 131  *                      Handles any OS Layer specific cmds, passes the rest
 132  *                      on to the Common Layer.
 133  *
 134  * Input:               dev     -- control device corresponding to the ctlr
 135  *                      cmd     -- ioctl cmd
 136  *                      buf     -- ptr to buffer in kernel memory, which is
 137  *                                 a copy of the input buffer in user-space
 138  *                      flags   -- mode of corresponding open
 139  *                      proc    -- current process
 140  * Output:              buf     -- ptr to buffer in kernel memory, which will
 141  *                                 be copied to the output buffer in user-space
 142  * Return value:        0       -- success
 143  *                      non-zero-- failure
 144  */
 145 static TW_INT32
 146 twa_ioctl(struct cdev *dev, u_long cmd, caddr_t buf, TW_INT32 flags, struct thread *proc)
 147 {
 148         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 149         TW_INT32                error;
 150
 151         tw_osli_dbg_dprintf(5, sc, "entered");
 152
 153         switch (cmd) {
 154         case TW_OSL_IOCTL_FIRMWARE_PASS_THROUGH:
 155                 tw_osli_dbg_dprintf(6, sc, "ioctl: fw_passthru");
 156                 error = tw_osli_fw_passthru(sc, (TW_INT8 *)buf);
 157                 break;
 158
 159         case TW_OSL_IOCTL_SCAN_BUS:
 160                 /* Request CAM for a bus scan. */
 161                 tw_osli_dbg_dprintf(6, sc, "ioctl: scan bus");
 162                 error = tw_osli_request_bus_scan(sc);
 163                 break;
 164
 165         default:
 166                 tw_osli_dbg_dprintf(6, sc, "ioctl: 0x%lx", cmd);
 167                 error = tw_cl_ioctl(&sc->ctlr_handle, cmd, buf);
 168                 break;
 169         }
 170         return(error);
 171 }
 172
 173
 174
 175 static TW_INT32 twa_probe(device_t dev);
 176 static TW_INT32 twa_attach(device_t dev);
 177 static TW_INT32 twa_detach(device_t dev);
 178 static TW_INT32 twa_shutdown(device_t dev);
 179 static TW_VOID  twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op);
 180 static TW_VOID  twa_pci_intr(TW_VOID *arg);
 181 static TW_VOID  twa_watchdog(TW_VOID *arg);
 182 int twa_setup_intr(struct twa_softc *sc);
 183 int twa_teardown_intr(struct twa_softc *sc);
 184
 185 static TW_INT32 tw_osli_alloc_mem(struct twa_softc *sc);
 186 static TW_VOID  tw_osli_free_resources(struct twa_softc *sc);
 187
 188 static TW_VOID  twa_map_load_data_callback(TW_VOID *arg,
 189         bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
 190 static TW_VOID  twa_map_load_callback(TW_VOID *arg,
 191         bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
 192
 193
 194 static device_method_t  twa_methods[] = {
 195         /* Device interface */
 196         DEVMETHOD(device_probe,         twa_probe),
 197         DEVMETHOD(device_attach,        twa_attach),
 198         DEVMETHOD(device_detach,        twa_detach),
 199         DEVMETHOD(device_shutdown,      twa_shutdown),
 200
 201         DEVMETHOD_END
 202 };
 203
 204 static driver_t twa_pci_driver = {
 205         "twa",
 206         twa_methods,
 207         sizeof(struct twa_softc)
 208 };
 209
 210 DRIVER_MODULE(twa, pci, twa_pci_driver, twa_devclass, 0, 0);
 211 MODULE_DEPEND(twa, cam, 1, 1, 1);
 212 MODULE_DEPEND(twa, pci, 1, 1, 1);
 213
 214
 215 /*
 216  * Function name:       twa_probe
 217  * Description:         Called at driver load time.  Claims 9000 ctlrs.
 218  *
 219  * Input:               dev     -- bus device corresponding to the ctlr
 220  * Output:              None
 221  * Return value:        <= 0    -- success
 222  *                      > 0     -- failure
 223  */
 224 static TW_INT32
 225 twa_probe(device_t dev)
 226 {
 227         static TW_UINT8 first_ctlr = 1;
 228
 229         tw_osli_dbg_printf(3, "entered");
 230
 231         if (tw_cl_ctlr_supported(pci_get_vendor(dev), pci_get_device(dev))) {
 232                 device_set_desc(dev, TW_OSLI_DEVICE_NAME);
 233                 /* Print the driver version only once. */
 234                 if (first_ctlr) {
 235                         printf("3ware device driver for 9000 series storage "
 236                                 "controllers, version: %s\n",
 237                                 TW_OSL_DRIVER_VERSION_STRING);
 238                         first_ctlr = 0;
 239                 }
 240                 return(0);
 241         }
 242         return(ENXIO);
 243 }
 244
 245 int twa_setup_intr(struct twa_softc *sc)
 246 {
 247         int error = 0;
 248
 249         if (!(sc->intr_handle) && (sc->irq_res)) {
 250                 error = bus_setup_intr(sc->bus_dev, sc->irq_res,
 251                                         INTR_TYPE_CAM | INTR_MPSAFE,
 252                                         NULL, twa_pci_intr,
 253                                         sc, &sc->intr_handle);
 254         }
 255         return( error );
 256 }
 257
 258
 259 int twa_teardown_intr(struct twa_softc *sc)
 260 {
 261         int error = 0;
 262
 263         if ((sc->intr_handle) && (sc->irq_res)) {
 264                 error = bus_teardown_intr(sc->bus_dev,
 265                                                 sc->irq_res, sc->intr_handle);
 266                 sc->intr_handle = NULL;
 267         }
 268         return( error );
 269 }
 270
 271
 272
 273 /*
 274  * Function name:       twa_attach
 275  * Description:         Allocates pci resources; updates sc; adds a node to the
 276  *                      sysctl tree to expose the driver version; makes calls
 277  *                      (to the Common Layer) to initialize ctlr, and to
 278  *                      attach to CAM.
 279  *
 280  * Input:               dev     -- bus device corresponding to the ctlr
 281  * Output:              None
 282  * Return value:        0       -- success
 283  *                      non-zero-- failure
 284  */
 285 static TW_INT32
 286 twa_attach(device_t dev)
 287 {
 288         struct twa_softc        *sc = device_get_softc(dev);
 289         TW_INT32                bar_num;
 290         TW_INT32                bar0_offset;
 291         TW_INT32                bar_size;
 292         TW_INT32                error;
 293
 294         tw_osli_dbg_dprintf(3, sc, "entered");
 295
 296         sc->ctlr_handle.osl_ctlr_ctxt = sc;
 297
 298         /* Initialize the softc structure. */
 299         sc->bus_dev = dev;
 300         sc->device_id = pci_get_device(dev);
 301
 302         /* Initialize the mutexes right here. */
 303         sc->io_lock = &(sc->io_lock_handle);
 304         mtx_init(sc->io_lock, "tw_osl_io_lock", NULL, MTX_SPIN);
 305         sc->q_lock = &(sc->q_lock_handle);
 306         mtx_init(sc->q_lock, "tw_osl_q_lock", NULL, MTX_SPIN);
 307         sc->sim_lock = &(sc->sim_lock_handle);
 308         mtx_init(sc->sim_lock, "tw_osl_sim_lock", NULL, MTX_DEF | MTX_RECURSE);
 309
 310         sysctl_ctx_init(&sc->sysctl_ctxt);
 311         sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctxt,
 312             SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, device_get_nameunit(dev),
 313             CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "");
 314         if (sc->sysctl_tree == NULL) {
 315                 tw_osli_printf(sc, "error = %d",
 316                         TW_CL_SEVERITY_ERROR_STRING,
 317                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 318                         0x2000,
 319                         "Cannot add sysctl tree node",
 320                         ENXIO);
 321                 return(ENXIO);
 322         }
 323         SYSCTL_ADD_STRING(&sc->sysctl_ctxt, SYSCTL_CHILDREN(sc->sysctl_tree),
 324                 OID_AUTO, "driver_version", CTLFLAG_RD,
 325                 TW_OSL_DRIVER_VERSION_STRING, 0, "TWA driver version");
 326
 327         /* Force the busmaster enable bit on, in case the BIOS forgot. */
 328         pci_enable_busmaster(dev);
 329
 330         /* Allocate the PCI register window. */
 331         if ((error = tw_cl_get_pci_bar_info(sc->device_id, TW_CL_BAR_TYPE_MEM,
 332                 &bar_num, &bar0_offset, &bar_size))) {
 333                 tw_osli_printf(sc, "error = %d",
 334                         TW_CL_SEVERITY_ERROR_STRING,
 335                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 336                         0x201F,
 337                         "Can't get PCI BAR info",
 338                         error);
 339                 tw_osli_free_resources(sc);
 340                 return(error);
 341         }
 342         sc->reg_res_id = PCIR_BARS + bar0_offset;
 343         if ((sc->reg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
 344                                 &(sc->reg_res_id), RF_ACTIVE))
 345                                 == NULL) {
 346                 tw_osli_printf(sc, "error = %d",
 347                         TW_CL_SEVERITY_ERROR_STRING,
 348                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 349                         0x2002,
 350                         "Can't allocate register window",
 351                         ENXIO);
 352                 tw_osli_free_resources(sc);
 353                 return(ENXIO);
 354         }
 355         sc->bus_tag = rman_get_bustag(sc->reg_res);
 356         sc->bus_handle = rman_get_bushandle(sc->reg_res);
 357
 358         /* Allocate and register our interrupt. */
 359         sc->irq_res_id = 0;
 360         if ((sc->irq_res = bus_alloc_resource_any(sc->bus_dev, SYS_RES_IRQ,
 361                                 &(sc->irq_res_id),
 362                                 RF_SHAREABLE | RF_ACTIVE)) == NULL) {
 363                 tw_osli_printf(sc, "error = %d",
 364                         TW_CL_SEVERITY_ERROR_STRING,
 365                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 366                         0x2003,
 367                         "Can't allocate interrupt",
 368                         ENXIO);
 369                 tw_osli_free_resources(sc);
 370                 return(ENXIO);
 371         }
 372         if ((error = twa_setup_intr(sc))) {
 373                 tw_osli_printf(sc, "error = %d",
 374                         TW_CL_SEVERITY_ERROR_STRING,
 375                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 376                         0x2004,
 377                         "Can't set up interrupt",
 378                         error);
 379                 tw_osli_free_resources(sc);
 380                 return(error);
 381         }
 382
 383         if ((error = tw_osli_alloc_mem(sc))) {
 384                 tw_osli_printf(sc, "error = %d",
 385                         TW_CL_SEVERITY_ERROR_STRING,
 386                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 387                         0x2005,
 388                         "Memory allocation failure",
 389                         error);
 390                 tw_osli_free_resources(sc);
 391                 return(error);
 392         }
 393
 394         /* Initialize the Common Layer for this controller. */
 395         if ((error = tw_cl_init_ctlr(&sc->ctlr_handle, sc->flags, sc->device_id,
 396                         TW_OSLI_MAX_NUM_REQUESTS, TW_OSLI_MAX_NUM_AENS,
 397                         sc->non_dma_mem, sc->dma_mem,
 398                         sc->dma_mem_phys
 399                         ))) {
 400                 tw_osli_printf(sc, "error = %d",
 401                         TW_CL_SEVERITY_ERROR_STRING,
 402                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 403                         0x2006,
 404                         "Failed to initialize Common Layer/controller",
 405                         error);
 406                 tw_osli_free_resources(sc);
 407                 return(error);
 408         }
 409
 410         /* Create the control device. */
 411         sc->ctrl_dev = make_dev(&twa_cdevsw, device_get_unit(sc->bus_dev),
 412                         UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR,
 413                         "twa%d", device_get_unit(sc->bus_dev));
 414         sc->ctrl_dev->si_drv1 = sc;
 415
 416         if ((error = tw_osli_cam_attach(sc))) {
 417                 tw_osli_free_resources(sc);
 418                 tw_osli_printf(sc, "error = %d",
 419                         TW_CL_SEVERITY_ERROR_STRING,
 420                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 421                         0x2007,
 422                         "Failed to initialize CAM",
 423                         error);
 424                 return(error);
 425         }
 426
 427         sc->watchdog_index = 0;
 428         callout_init(&(sc->watchdog_callout[0]), 1);
 429         callout_init(&(sc->watchdog_callout[1]), 1);
 430         callout_reset(&(sc->watchdog_callout[0]), 5*hz, twa_watchdog, &sc->ctlr_handle);
 431
 432         return(0);
 433 }
 434
 435
 436 static TW_VOID
 437 twa_watchdog(TW_VOID *arg)
 438 {
 439         struct tw_cl_ctlr_handle *ctlr_handle =
 440                 (struct tw_cl_ctlr_handle *)arg;
 441         struct twa_softc                *sc = ctlr_handle->osl_ctlr_ctxt;
 442         int                             i;
 443         int                             i_need_a_reset = 0;
 444         int                             driver_is_active = 0;
 445         int                             my_watchdog_was_pending = 1234;
 446         TW_UINT64                       current_time;
 447         struct tw_osli_req_context      *my_req;
 448
 449
 450 //==============================================================================
 451         current_time = (TW_UINT64) (tw_osl_get_local_time());
 452
 453         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 454                 my_req = &(sc->req_ctx_buf[i]);
 455
 456                 if ((my_req->state == TW_OSLI_REQ_STATE_BUSY) &&
 457                         (my_req->deadline) &&
 458                         (my_req->deadline < current_time)) {
 459                         tw_cl_set_reset_needed(ctlr_handle);
 460 #ifdef    TW_OSL_DEBUG
 461                         device_printf((sc)->bus_dev, "Request %d timed out! d = %llu, c = %llu\n", i, my_req->deadline, current_time);
 462 #else  /* TW_OSL_DEBUG */
 463                         device_printf((sc)->bus_dev, "Request %d timed out!\n", i);
 464 #endif /* TW_OSL_DEBUG */
 465                         break;
 466                 }
 467         }
 468 //==============================================================================
 469
 470         i_need_a_reset = tw_cl_is_reset_needed(ctlr_handle);
 471
 472         i = (int) ((sc->watchdog_index++) & 1);
 473
 474         driver_is_active = tw_cl_is_active(ctlr_handle);
 475
 476         if (i_need_a_reset) {
 477 #ifdef    TW_OSL_DEBUG
 478                 device_printf((sc)->bus_dev, "Watchdog rescheduled in 70 seconds\n");
 479 #endif /* TW_OSL_DEBUG */
 480                 my_watchdog_was_pending =
 481                         callout_reset(&(sc->watchdog_callout[i]), 70*hz, twa_watchdog, &sc->ctlr_handle);
 482                 tw_cl_reset_ctlr(ctlr_handle);
 483 #ifdef    TW_OSL_DEBUG
 484                 device_printf((sc)->bus_dev, "Watchdog reset completed!\n");
 485 #endif /* TW_OSL_DEBUG */
 486         } else if (driver_is_active) {
 487                 my_watchdog_was_pending =
 488                         callout_reset(&(sc->watchdog_callout[i]),  5*hz, twa_watchdog, &sc->ctlr_handle);
 489         }
 490 #ifdef    TW_OSL_DEBUG
 491         if (i_need_a_reset || my_watchdog_was_pending)
 492                 device_printf((sc)->bus_dev, "i_need_a_reset = %d, "
 493                 "driver_is_active = %d, my_watchdog_was_pending = %d\n",
 494                 i_need_a_reset, driver_is_active, my_watchdog_was_pending);
 495 #endif /* TW_OSL_DEBUG */
 496 }
 497
 498
 499 /*
 500  * Function name:       tw_osli_alloc_mem
 501  * Description:         Allocates memory needed both by CL and OSL.
 502  *
 503  * Input:               sc      -- OSL internal controller context
 504  * Output:              None
 505  * Return value:        0       -- success
 506  *                      non-zero-- failure
 507  */
 508 static TW_INT32
 509 tw_osli_alloc_mem(struct twa_softc *sc)
 510 {
 511         struct tw_osli_req_context      *req;
 512         TW_UINT32                       max_sg_elements;
 513         TW_UINT32                       non_dma_mem_size;
 514         TW_UINT32                       dma_mem_size;
 515         TW_INT32                        error;
 516         TW_INT32                        i;
 517
 518         tw_osli_dbg_dprintf(3, sc, "entered");
 519
 520         sc->flags |= (sizeof(bus_addr_t) == 8) ? TW_CL_64BIT_ADDRESSES : 0;
 521         sc->flags |= (sizeof(bus_size_t) == 8) ? TW_CL_64BIT_SG_LENGTH : 0;
 522
 523         max_sg_elements = (sizeof(bus_addr_t) == 8) ?
 524                 TW_CL_MAX_64BIT_SG_ELEMENTS : TW_CL_MAX_32BIT_SG_ELEMENTS;
 525
 526         if ((error = tw_cl_get_mem_requirements(&sc->ctlr_handle, sc->flags,
 527                         sc->device_id, TW_OSLI_MAX_NUM_REQUESTS,  TW_OSLI_MAX_NUM_AENS,
 528                         &(sc->alignment), &(sc->sg_size_factor),
 529                         &non_dma_mem_size, &dma_mem_size
 530                         ))) {
 531                 tw_osli_printf(sc, "error = %d",
 532                         TW_CL_SEVERITY_ERROR_STRING,
 533                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 534                         0x2008,
 535                         "Can't get Common Layer's memory requirements",
 536                         error);
 537                 return(error);
 538         }
 539
 540         if ((sc->non_dma_mem = malloc(non_dma_mem_size, TW_OSLI_MALLOC_CLASS,
 541                                 M_WAITOK)) == NULL) {
 542                 tw_osli_printf(sc, "error = %d",
 543                         TW_CL_SEVERITY_ERROR_STRING,
 544                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 545                         0x2009,
 546                         "Can't allocate non-dma memory",
 547                         ENOMEM);
 548                 return(ENOMEM);
 549         }
 550
 551         /* Create the parent dma tag. */
 552         if (bus_dma_tag_create(bus_get_dma_tag(sc->bus_dev), /* parent */
 553                                 sc->alignment,          /* alignment */
 554                                 TW_OSLI_DMA_BOUNDARY,   /* boundary */
 555                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 556                                 BUS_SPACE_MAXADDR,      /* highaddr */
 557                                 NULL, NULL,             /* filter, filterarg */
 558                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 559                                 max_sg_elements,        /* nsegments */
 560                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 561                                 0,                      /* flags */
 562                                 NULL,                   /* lockfunc */
 563                                 NULL,                   /* lockfuncarg */
 564                                 &sc->parent_tag         /* tag */)) {
 565                 tw_osli_printf(sc, "error = %d",
 566                         TW_CL_SEVERITY_ERROR_STRING,
 567                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 568                         0x200A,
 569                         "Can't allocate parent DMA tag",
 570                         ENOMEM);
 571                 return(ENOMEM);
 572         }
 573
 574         /* Create a dma tag for Common Layer's DMA'able memory (dma_mem). */
 575         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 576                                 sc->alignment,          /* alignment */
 577                                 0,                      /* boundary */
 578                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 579                                 BUS_SPACE_MAXADDR,      /* highaddr */
 580                                 NULL, NULL,             /* filter, filterarg */
 581                                 dma_mem_size,           /* maxsize */
 582                                 1,                      /* nsegments */
 583                                 BUS_SPACE_MAXSIZE,      /* maxsegsize */
 584                                 0,                      /* flags */
 585                                 NULL,                   /* lockfunc */
 586                                 NULL,                   /* lockfuncarg */
 587                                 &sc->cmd_tag            /* tag */)) {
 588                 tw_osli_printf(sc, "error = %d",
 589                         TW_CL_SEVERITY_ERROR_STRING,
 590                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 591                         0x200B,
 592                         "Can't allocate DMA tag for Common Layer's "
 593                         "DMA'able memory",
 594                         ENOMEM);
 595                 return(ENOMEM);
 596         }
 597
 598         if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 599                 BUS_DMA_NOWAIT, &sc->cmd_map)) {
 600                 /* Try a second time. */
 601                 if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 602                         BUS_DMA_NOWAIT, &sc->cmd_map)) {
 603                         tw_osli_printf(sc, "error = %d",
 604                                 TW_CL_SEVERITY_ERROR_STRING,
 605                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 606                                 0x200C,
 607                                 "Can't allocate DMA'able memory for the"
 608                                 "Common Layer",
 609                                 ENOMEM);
 610                         return(ENOMEM);
 611                 }
 612         }
 613
 614         bus_dmamap_load(sc->cmd_tag, sc->cmd_map, sc->dma_mem,
 615                 dma_mem_size, twa_map_load_callback,
 616                 &sc->dma_mem_phys, 0);
 617
 618         /*
 619          * Create a dma tag for data buffers; size will be the maximum
 620          * possible I/O size (128kB).
 621          */
 622         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 623                                 sc->alignment,          /* alignment */
 624                                 0,                      /* boundary */
 625                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 626                                 BUS_SPACE_MAXADDR,      /* highaddr */
 627                                 NULL, NULL,             /* filter, filterarg */
 628                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 629                                 max_sg_elements,        /* nsegments */
 630                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 631                                 BUS_DMA_ALLOCNOW,       /* flags */
 632                                 twa_busdma_lock,        /* lockfunc */
 633                                 sc->io_lock,            /* lockfuncarg */
 634                                 &sc->dma_tag            /* tag */)) {
 635                 tw_osli_printf(sc, "error = %d",
 636                         TW_CL_SEVERITY_ERROR_STRING,
 637                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 638                         0x200F,
 639                         "Can't allocate DMA tag for data buffers",
 640                         ENOMEM);
 641                 return(ENOMEM);
 642         }
 643
 644         /*
 645          * Create a dma tag for ioctl data buffers; size will be the maximum
 646          * possible I/O size (128kB).
 647          */
 648         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 649                                 sc->alignment,          /* alignment */
 650                                 0,                      /* boundary */
 651                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 652                                 BUS_SPACE_MAXADDR,      /* highaddr */
 653                                 NULL, NULL,             /* filter, filterarg */
 654                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 655                                 max_sg_elements,        /* nsegments */
 656                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 657                                 BUS_DMA_ALLOCNOW,       /* flags */
 658                                 twa_busdma_lock,        /* lockfunc */
 659                                 sc->io_lock,            /* lockfuncarg */
 660                                 &sc->ioctl_tag          /* tag */)) {
 661                 tw_osli_printf(sc, "error = %d",
 662                         TW_CL_SEVERITY_ERROR_STRING,
 663                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 664                         0x2010,
 665                         "Can't allocate DMA tag for ioctl data buffers",
 666                         ENOMEM);
 667                 return(ENOMEM);
 668         }
 669
 670         /* Create just one map for all ioctl request data buffers. */
 671         if (bus_dmamap_create(sc->ioctl_tag, 0, &sc->ioctl_map)) {
 672                 tw_osli_printf(sc, "error = %d",
 673                         TW_CL_SEVERITY_ERROR_STRING,
 674                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 675                         0x2011,
 676                         "Can't create ioctl map",
 677                         ENOMEM);
 678                 return(ENOMEM);
 679         }
 680
 681
 682         /* Initialize request queues. */
 683         tw_osli_req_q_init(sc, TW_OSLI_FREE_Q);
 684         tw_osli_req_q_init(sc, TW_OSLI_BUSY_Q);
 685
 686         if ((sc->req_ctx_buf = (struct tw_osli_req_context *)
 687                         malloc((sizeof(struct tw_osli_req_context) *
 688                                 TW_OSLI_MAX_NUM_REQUESTS),
 689                                 TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
 690                 tw_osli_printf(sc, "error = %d",
 691                         TW_CL_SEVERITY_ERROR_STRING,
 692                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 693                         0x2012,
 694                         "Failed to allocate request packets",
 695                         ENOMEM);
 696                 return(ENOMEM);
 697         }
 698         bzero(sc->req_ctx_buf,
 699                 sizeof(struct tw_osli_req_context) * TW_OSLI_MAX_NUM_REQUESTS);
 700
 701         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 702                 req = &(sc->req_ctx_buf[i]);
 703                 req->ctlr = sc;
 704                 if (bus_dmamap_create(sc->dma_tag, 0, &req->dma_map)) {
 705                         tw_osli_printf(sc, "request # = %d, error = %d",
 706                                 TW_CL_SEVERITY_ERROR_STRING,
 707                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 708                                 0x2013,
 709                                 "Can't create dma map",
 710                                 i, ENOMEM);
 711                         return(ENOMEM);
 712                 }
 713
 714                 /* Initialize the ioctl wakeup/ timeout mutex */
 715                 req->ioctl_wake_timeout_lock = &(req->ioctl_wake_timeout_lock_handle);
 716                 mtx_init(req->ioctl_wake_timeout_lock, "tw_ioctl_wake_timeout_lock", NULL, MTX_DEF);
 717
 718                 /* Insert request into the free queue. */
 719                 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 720         }
 721
 722         return(0);
 723 }
 724
 725
 726
 727 /*
 728  * Function name:       tw_osli_free_resources
 729  * Description:         Performs clean-up at the time of going down.
 730  *
 731  * Input:               sc      -- ptr to OSL internal ctlr context
 732  * Output:              None
 733  * Return value:        None
 734  */
 735 static TW_VOID
 736 tw_osli_free_resources(struct twa_softc *sc)
 737 {
 738         struct tw_osli_req_context      *req;
 739         TW_INT32                        error = 0;
 740
 741         tw_osli_dbg_dprintf(3, sc, "entered");
 742
 743         /* Detach from CAM */
 744         tw_osli_cam_detach(sc);
 745
 746         if (sc->req_ctx_buf)
 747                 while ((req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q)) !=
 748                         NULL) {
 749                         mtx_destroy(req->ioctl_wake_timeout_lock);
 750
 751                         if ((error = bus_dmamap_destroy(sc->dma_tag,
 752                                         req->dma_map)))
 753                                 tw_osli_dbg_dprintf(1, sc,
 754                                         "dmamap_destroy(dma) returned %d",
 755                                         error);
 756                 }
 757
 758         if ((sc->ioctl_tag) && (sc->ioctl_map))
 759                 if ((error = bus_dmamap_destroy(sc->ioctl_tag, sc->ioctl_map)))
 760                         tw_osli_dbg_dprintf(1, sc,
 761                                 "dmamap_destroy(ioctl) returned %d", error);
 762
 763         /* Free all memory allocated so far. */
 764         if (sc->req_ctx_buf)
 765                 free(sc->req_ctx_buf, TW_OSLI_MALLOC_CLASS);
 766
 767         if (sc->non_dma_mem)
 768                 free(sc->non_dma_mem, TW_OSLI_MALLOC_CLASS);
 769
 770         if (sc->dma_mem) {
 771                 bus_dmamap_unload(sc->cmd_tag, sc->cmd_map);
 772                 bus_dmamem_free(sc->cmd_tag, sc->dma_mem,
 773                         sc->cmd_map);
 774         }
 775         if (sc->cmd_tag)
 776                 if ((error = bus_dma_tag_destroy(sc->cmd_tag)))
 777                         tw_osli_dbg_dprintf(1, sc,
 778                                 "dma_tag_destroy(cmd) returned %d", error);
 779
 780         if (sc->dma_tag)
 781                 if ((error = bus_dma_tag_destroy(sc->dma_tag)))
 782                         tw_osli_dbg_dprintf(1, sc,
 783                                 "dma_tag_destroy(dma) returned %d", error);
 784
 785         if (sc->ioctl_tag)
 786                 if ((error = bus_dma_tag_destroy(sc->ioctl_tag)))
 787                         tw_osli_dbg_dprintf(1, sc,
 788                                 "dma_tag_destroy(ioctl) returned %d", error);
 789
 790         if (sc->parent_tag)
 791                 if ((error = bus_dma_tag_destroy(sc->parent_tag)))
 792                         tw_osli_dbg_dprintf(1, sc,
 793                                 "dma_tag_destroy(parent) returned %d", error);
 794
 795
 796         /* Disconnect the interrupt handler. */
 797         if ((error = twa_teardown_intr(sc)))
 798                         tw_osli_dbg_dprintf(1, sc,
 799                                 "teardown_intr returned %d", error);
 800
 801         if (sc->irq_res != NULL)
 802                 if ((error = bus_release_resource(sc->bus_dev,
 803                                 SYS_RES_IRQ, sc->irq_res_id, sc->irq_res)))
 804                         tw_osli_dbg_dprintf(1, sc,
 805                                 "release_resource(irq) returned %d", error);
 806
 807
 808         /* Release the register window mapping. */
 809         if (sc->reg_res != NULL)
 810                 if ((error = bus_release_resource(sc->bus_dev,
 811                                 SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res)))
 812                         tw_osli_dbg_dprintf(1, sc,
 813                                 "release_resource(io) returned %d", error);
 814
 815
 816         /* Destroy the control device. */
 817         if (sc->ctrl_dev != (struct cdev *)NULL)
 818                 destroy_dev(sc->ctrl_dev);
 819
 820         if ((error = sysctl_ctx_free(&sc->sysctl_ctxt)))
 821                 tw_osli_dbg_dprintf(1, sc,
 822                         "sysctl_ctx_free returned %d", error);
 823
 824 }
 825
 826
 827
 828 /*
 829  * Function name:       twa_detach
 830  * Description:         Called when the controller is being detached from
 831  *                      the pci bus.
 832  *
 833  * Input:               dev     -- bus device corresponding to the ctlr
 834  * Output:              None
 835  * Return value:        0       -- success
 836  *                      non-zero-- failure
 837  */
 838 static TW_INT32
 839 twa_detach(device_t dev)
 840 {
 841         struct twa_softc        *sc = device_get_softc(dev);
 842         TW_INT32                error;
 843
 844         tw_osli_dbg_dprintf(3, sc, "entered");
 845
 846         error = EBUSY;
 847         if (sc->open) {
 848                 tw_osli_printf(sc, "error = %d",
 849                         TW_CL_SEVERITY_ERROR_STRING,
 850                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 851                         0x2014,
 852                         "Device open",
 853                         error);
 854                 goto out;
 855         }
 856
 857         /* Shut the controller down. */
 858         if ((error = twa_shutdown(dev)))
 859                 goto out;
 860
 861         /* Free all resources associated with this controller. */
 862         tw_osli_free_resources(sc);
 863         error = 0;
 864
 865 out:
 866         return(error);
 867 }
 868
 869
 870
 871 /*
 872  * Function name:       twa_shutdown
 873  * Description:         Called at unload/shutdown time.  Lets the controller
 874  *                      know that we are going down.
 875  *
 876  * Input:               dev     -- bus device corresponding to the ctlr
 877  * Output:              None
 878  * Return value:        0       -- success
 879  *                      non-zero-- failure
 880  */
 881 static TW_INT32
 882 twa_shutdown(device_t dev)
 883 {
 884         struct twa_softc        *sc = device_get_softc(dev);
 885         TW_INT32                error = 0;
 886
 887         tw_osli_dbg_dprintf(3, sc, "entered");
 888
 889         /* Disconnect interrupts. */
 890         error = twa_teardown_intr(sc);
 891
 892         /* Stop watchdog task. */
 893         callout_drain(&(sc->watchdog_callout[0]));
 894         callout_drain(&(sc->watchdog_callout[1]));
 895
 896         /* Disconnect from the controller. */
 897         if ((error = tw_cl_shutdown_ctlr(&(sc->ctlr_handle), 0))) {
 898                 tw_osli_printf(sc, "error = %d",
 899                         TW_CL_SEVERITY_ERROR_STRING,
 900                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 901                         0x2015,
 902                         "Failed to shutdown Common Layer/controller",
 903                         error);
 904         }
 905         return(error);
 906 }
 907
 908
 909
 910 /*
 911  * Function name:       twa_busdma_lock
 912  * Description:         Function to provide synchronization during busdma_swi.
 913  *
 914  * Input:               lock_arg -- lock mutex sent as argument
 915  *                      op -- operation (lock/unlock) expected of the function
 916  * Output:              None
 917  * Return value:        None
 918  */
 919 TW_VOID
 920 twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op)
 921 {
 922         struct mtx      *lock;
 923
 924         lock = (struct mtx *)lock_arg;
 925         switch (op) {
 926         case BUS_DMA_LOCK:
 927                 mtx_lock_spin(lock);
 928                 break;
 929
 930         case BUS_DMA_UNLOCK:
 931                 mtx_unlock_spin(lock);
 932                 break;
 933
 934         default:
 935                 panic("Unknown operation 0x%x for twa_busdma_lock!", op);
 936         }
 937 }
 938
 939
 940 /*
 941  * Function name:       twa_pci_intr
 942  * Description:         Interrupt handler.  Wrapper for twa_interrupt.
 943  *
 944  * Input:               arg     -- ptr to OSL internal ctlr context
 945  * Output:              None
 946  * Return value:        None
 947  */
 948 static TW_VOID
 949 twa_pci_intr(TW_VOID *arg)
 950 {
 951         struct twa_softc        *sc = (struct twa_softc *)arg;
 952
 953         tw_osli_dbg_dprintf(10, sc, "entered");
 954         tw_cl_interrupt(&(sc->ctlr_handle));
 955 }
 956
 957
 958 /*
 959  * Function name:       tw_osli_fw_passthru
 960  * Description:         Builds a fw passthru cmd pkt, and submits it to CL.
 961  *
 962  * Input:               sc      -- ptr to OSL internal ctlr context
 963  *                      buf     -- ptr to ioctl pkt understood by CL
 964  * Output:              None
 965  * Return value:        0       -- success
 966  *                      non-zero-- failure
 967  */
 968 TW_INT32
 969 tw_osli_fw_passthru(struct twa_softc *sc, TW_INT8 *buf)
 970 {
 971         struct tw_osli_req_context              *req;
 972         struct tw_osli_ioctl_no_data_buf        *user_buf =
 973                 (struct tw_osli_ioctl_no_data_buf *)buf;
 974         TW_TIME                                 end_time;
 975         TW_UINT32                               timeout = 60;
 976         TW_UINT32                               data_buf_size_adjusted;
 977         struct tw_cl_req_packet                 *req_pkt;
 978         struct tw_cl_passthru_req_packet        *pt_req;
 979         TW_INT32                                error;
 980
 981         tw_osli_dbg_dprintf(5, sc, "ioctl: passthru");
 982
 983         if ((req = tw_osli_get_request(sc)) == NULL)
 984                 return(EBUSY);
 985
 986         req->req_handle.osl_req_ctxt = req;
 987         req->orig_req = buf;
 988         req->flags |= TW_OSLI_REQ_FLAGS_PASSTHRU;
 989
 990         req_pkt = &(req->req_pkt);
 991         req_pkt->status = 0;
 992         req_pkt->tw_osl_callback = tw_osl_complete_passthru;
 993         /* Let the Common Layer retry the request on cmd queue full. */
 994         req_pkt->flags |= TW_CL_REQ_RETRY_ON_BUSY;
 995
 996         pt_req = &(req_pkt->gen_req_pkt.pt_req);
 997         /*
 998          * Make sure that the data buffer sent to firmware is a
 999          * 512 byte multiple in size.
1000          */
1001         data_buf_size_adjusted =
1002                 (user_buf->driver_pkt.buffer_length +
1003                 (sc->sg_size_factor - 1)) & ~(sc->sg_size_factor - 1);
1004         if ((req->length = data_buf_size_adjusted)) {
1005                 if ((req->data = malloc(data_buf_size_adjusted,
1006                         TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
1007                         error = ENOMEM;
1008                         tw_osli_printf(sc, "error = %d",
1009                                 TW_CL_SEVERITY_ERROR_STRING,
1010                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1011                                 0x2016,
1012                                 "Could not alloc mem for "
1013                                 "fw_passthru data_buf",
1014                                 error);
1015                         goto fw_passthru_err;
1016                 }
1017                 /* Copy the payload. */
1018                 if ((error = copyin((TW_VOID *)(user_buf->pdata),
1019                         req->data,
1020                         user_buf->driver_pkt.buffer_length)) != 0) {
1021                         tw_osli_printf(sc, "error = %d",
1022                                 TW_CL_SEVERITY_ERROR_STRING,
1023                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1024                                 0x2017,
1025                                 "Could not copyin fw_passthru data_buf",
1026                                 error);
1027                         goto fw_passthru_err;
1028                 }
1029                 pt_req->sgl_entries = 1; /* will be updated during mapping */
1030                 req->flags |= (TW_OSLI_REQ_FLAGS_DATA_IN |
1031                         TW_OSLI_REQ_FLAGS_DATA_OUT);
1032         } else
1033                 pt_req->sgl_entries = 0; /* no payload */
1034
1035         pt_req->cmd_pkt = (TW_VOID *)(&(user_buf->cmd_pkt));
1036         pt_req->cmd_pkt_length = sizeof(struct tw_cl_command_packet);
1037
1038         if ((error = tw_osli_map_request(req)))
1039                 goto fw_passthru_err;
1040
1041         end_time = tw_osl_get_local_time() + timeout;
1042         while (req->state != TW_OSLI_REQ_STATE_COMPLETE) {
1043                 mtx_lock(req->ioctl_wake_timeout_lock);
1044                 req->flags |= TW_OSLI_REQ_FLAGS_SLEEPING;
1045
1046                 error = mtx_sleep(req, req->ioctl_wake_timeout_lock, 0,
1047                             "twa_passthru", timeout*hz);
1048                 mtx_unlock(req->ioctl_wake_timeout_lock);
1049
1050                 if (!(req->flags & TW_OSLI_REQ_FLAGS_SLEEPING))
1051                         error = 0;
1052                 req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
1053
1054                 if (! error) {
1055                         if (((error = req->error_code)) ||
1056                                 ((error = (req->state !=
1057                                 TW_OSLI_REQ_STATE_COMPLETE))) ||
1058                                 ((error = req_pkt->status)))
1059                                 goto fw_passthru_err;
1060                         break;
1061                 }
1062
1063                 if (req_pkt->status) {
1064                         error = req_pkt->status;
1065                         goto fw_passthru_err;
1066                 }
1067
1068                 if (error == EWOULDBLOCK) {
1069                         /* Time out! */
1070                         if ((!(req->error_code))                       &&
1071                             (req->state == TW_OSLI_REQ_STATE_COMPLETE) &&
1072                             (!(req_pkt->status))                          ) {
1073 #ifdef    TW_OSL_DEBUG
1074                                 tw_osli_printf(sc, "request = %p",
1075                                         TW_CL_SEVERITY_ERROR_STRING,
1076                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1077                                         0x7777,
1078                                         "FALSE Passthru timeout!",
1079                                         req);
1080 #endif /* TW_OSL_DEBUG */
1081                                 error = 0; /* False error */
1082                                 break;
1083                         }
1084                         if (!(tw_cl_is_reset_needed(&(req->ctlr->ctlr_handle)))) {
1085 #ifdef    TW_OSL_DEBUG
1086                                 tw_osli_printf(sc, "request = %p",
1087                                         TW_CL_SEVERITY_ERROR_STRING,
1088                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1089                                         0x2018,
1090                                         "Passthru request timed out!",
1091                                         req);
1092 #else  /* TW_OSL_DEBUG */
1093                         device_printf((sc)->bus_dev, "Passthru request timed out!\n");
1094 #endif /* TW_OSL_DEBUG */
1095                                 tw_cl_reset_ctlr(&(req->ctlr->ctlr_handle));
1096                         }
1097
1098                         error = 0;
1099                         end_time = tw_osl_get_local_time() + timeout;
1100                         continue;
1101                         /*
1102                          * Don't touch req after a reset.  It (and any
1103                          * associated data) will be
1104                          * unmapped by the callback.
1105                          */
1106                 }
1107                 /*
1108                  * Either the request got completed, or we were woken up by a
1109                  * signal.  Calculate the new timeout, in case it was the latter.
1110                  */
1111                 timeout = (end_time - tw_osl_get_local_time());
1112         } /* End of while loop */
1113
1114         /* If there was a payload, copy it back. */
1115         if ((!error) && (req->length))
1116                 if ((error = copyout(req->data, user_buf->pdata,
1117                         user_buf->driver_pkt.buffer_length)))
1118                         tw_osli_printf(sc, "error = %d",
1119                                 TW_CL_SEVERITY_ERROR_STRING,
1120                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1121                                 0x2019,
1122                                 "Could not copyout fw_passthru data_buf",
1123                                 error);
1124
1125 fw_passthru_err:
1126
1127         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1128                 error = EBUSY;
1129
1130         user_buf->driver_pkt.os_status = error;
1131         /* Free resources. */
1132         if (req->data)
1133                 free(req->data, TW_OSLI_MALLOC_CLASS);
1134         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1135         return(error);
1136 }
1137
1138
1139
1140 /*
1141  * Function name:       tw_osl_complete_passthru
1142  * Description:         Called to complete passthru requests.
1143  *
1144  * Input:               req_handle      -- ptr to request handle
1145  * Output:              None
1146  * Return value:        None
1147  */
1148 TW_VOID
1149 tw_osl_complete_passthru(struct tw_cl_req_handle *req_handle)
1150 {
1151         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
1152         struct tw_cl_req_packet         *req_pkt =
1153                 (struct tw_cl_req_packet *)(&req->req_pkt);
1154         struct twa_softc                *sc = req->ctlr;
1155
1156         tw_osli_dbg_dprintf(5, sc, "entered");
1157
1158         if (req->state != TW_OSLI_REQ_STATE_BUSY) {
1159                 tw_osli_printf(sc, "request = %p, status = %d",
1160                         TW_CL_SEVERITY_ERROR_STRING,
1161                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1162                         0x201B,
1163                         "Unposted command completed!!",
1164                         req, req->state);
1165         }
1166
1167         /*
1168          * Remove request from the busy queue.  Just mark it complete.
1169          * There's no need to move it into the complete queue as we are
1170          * going to be done with it right now.
1171          */
1172         req->state = TW_OSLI_REQ_STATE_COMPLETE;
1173         tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q);
1174
1175         tw_osli_unmap_request(req);
1176
1177         /*
1178          * Don't do a wake up if there was an error even before the request
1179          * was sent down to the Common Layer, and we hadn't gotten an
1180          * EINPROGRESS.  The request originator will then be returned an
1181          * error, and he can do the clean-up.
1182          */
1183         if ((req->error_code) && (!(req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)))
1184                 return;
1185
1186         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1187                 if (req->flags & TW_OSLI_REQ_FLAGS_SLEEPING) {
1188                         /* Wake up the sleeping command originator. */
1189                         tw_osli_dbg_dprintf(5, sc,
1190                                 "Waking up originator of request %p", req);
1191                         req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
1192                         wakeup_one(req);
1193                 } else {
1194                         /*
1195                          * If the request completed even before mtx_sleep
1196                          * was called, simply return.
1197                          */
1198                         if (req->flags & TW_OSLI_REQ_FLAGS_MAPPED)
1199                                 return;
1200
1201                         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1202                                 return;
1203
1204                         tw_osli_printf(sc, "request = %p",
1205                                 TW_CL_SEVERITY_ERROR_STRING,
1206                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1207                                 0x201C,
1208                                 "Passthru callback called, "
1209                                 "and caller not sleeping",
1210                                 req);
1211                 }
1212         } else {
1213                 tw_osli_printf(sc, "request = %p",
1214                         TW_CL_SEVERITY_ERROR_STRING,
1215                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1216                         0x201D,
1217                         "Passthru callback called for non-passthru request",
1218                         req);
1219         }
1220 }
1221
1222
1223
1224 /*
1225  * Function name:       tw_osli_get_request
1226  * Description:         Gets a request pkt from the free queue.
1227  *
1228  * Input:               sc      -- ptr to OSL internal ctlr context
1229  * Output:              None
1230  * Return value:        ptr to request pkt      -- success
1231  *                      NULL                    -- failure
1232  */
1233 struct tw_osli_req_context *
1234 tw_osli_get_request(struct twa_softc *sc)
1235 {
1236         struct tw_osli_req_context      *req;
1237
1238         tw_osli_dbg_dprintf(4, sc, "entered");
1239
1240         /* Get a free request packet. */
1241         req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q);
1242
1243         /* Initialize some fields to their defaults. */
1244         if (req) {
1245                 req->req_handle.osl_req_ctxt = NULL;
1246                 req->req_handle.cl_req_ctxt = NULL;
1247                 req->req_handle.is_io = 0;
1248                 req->data = NULL;
1249                 req->length = 0;
1250                 req->deadline = 0;
1251                 req->real_data = NULL;
1252                 req->real_length = 0;
1253                 req->state = TW_OSLI_REQ_STATE_INIT;/* req being initialized */
1254                 req->flags = 0;
1255                 req->error_code = 0;
1256                 req->orig_req = NULL;
1257
1258                 bzero(&(req->req_pkt), sizeof(struct tw_cl_req_packet));
1259
1260         }
1261         return(req);
1262 }
1263
1264
1265
1266 /*
1267  * Function name:       twa_map_load_data_callback
1268  * Description:         Callback of bus_dmamap_load for the buffer associated
1269  *                      with data.  Updates the cmd pkt (size/sgl_entries
1270  *                      fields, as applicable) to reflect the number of sg
1271  *                      elements.
1272  *
1273  * Input:               arg     -- ptr to OSL internal request context
1274  *                      segs    -- ptr to a list of segment descriptors
1275  *                      nsegments--# of segments
1276  *                      error   -- 0 if no errors encountered before callback,
1277  *                                 non-zero if errors were encountered
1278  * Output:              None
1279  * Return value:        None
1280  */
1281 static TW_VOID
1282 twa_map_load_data_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1283         TW_INT32 nsegments, TW_INT32 error)
1284 {
1285         struct tw_osli_req_context      *req =
1286                 (struct tw_osli_req_context *)arg;
1287         struct twa_softc                *sc = req->ctlr;
1288         struct tw_cl_req_packet         *req_pkt = &(req->req_pkt);
1289
1290         tw_osli_dbg_dprintf(10, sc, "entered");
1291
1292         if (error == EINVAL) {
1293                 req->error_code = error;
1294                 return;
1295         }
1296
1297         /* Mark the request as currently being processed. */
1298         req->state = TW_OSLI_REQ_STATE_BUSY;
1299         /* Move the request into the busy queue. */
1300         tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1301
1302         req->flags |= TW_OSLI_REQ_FLAGS_MAPPED;
1303
1304         if (error == EFBIG) {
1305                 req->error_code = error;
1306                 goto out;
1307         }
1308
1309         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1310                 struct tw_cl_passthru_req_packet        *pt_req;
1311
1312                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1313                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1314                                 BUS_DMASYNC_PREREAD);
1315
1316                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1317                         /*
1318                          * If we're using an alignment buffer, and we're
1319                          * writing data, copy the real data out.
1320                          */
1321                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1322                                 bcopy(req->real_data, req->data, req->real_length);
1323                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1324                                 BUS_DMASYNC_PREWRITE);
1325                 }
1326
1327                 pt_req = &(req_pkt->gen_req_pkt.pt_req);
1328                 pt_req->sg_list = (TW_UINT8 *)segs;
1329                 pt_req->sgl_entries += (nsegments - 1);
1330                 error = tw_cl_fw_passthru(&(sc->ctlr_handle), req_pkt,
1331                         &(req->req_handle));
1332         } else {
1333                 struct tw_cl_scsi_req_packet    *scsi_req;
1334
1335                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1336                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1337                                 BUS_DMASYNC_PREREAD);
1338
1339                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1340                         /*
1341                          * If we're using an alignment buffer, and we're
1342                          * writing data, copy the real data out.
1343                          */
1344                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1345                                 bcopy(req->real_data, req->data, req->real_length);
1346                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1347                                 BUS_DMASYNC_PREWRITE);
1348                 }
1349
1350                 scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
1351                 scsi_req->sg_list = (TW_UINT8 *)segs;
1352                 scsi_req->sgl_entries += (nsegments - 1);
1353                 error = tw_cl_start_io(&(sc->ctlr_handle), req_pkt,
1354                         &(req->req_handle));
1355         }
1356
1357 out:
1358         if (error) {
1359                 req->error_code = error;
1360                 req_pkt->tw_osl_callback(&(req->req_handle));
1361                 /*
1362                  * If the caller had been returned EINPROGRESS, and he has
1363                  * registered a callback for handling completion, the callback
1364                  * will never get called because we were unable to submit the
1365                  * request.  So, free up the request right here.
1366                  */
1367                 if (req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)
1368                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1369         }
1370 }
1371
1372
1373
1374 /*
1375  * Function name:       twa_map_load_callback
1376  * Description:         Callback of bus_dmamap_load for the buffer associated
1377  *                      with a cmd pkt.
1378  *
1379  * Input:               arg     -- ptr to variable to hold phys addr
1380  *                      segs    -- ptr to a list of segment descriptors
1381  *                      nsegments--# of segments
1382  *                      error   -- 0 if no errors encountered before callback,
1383  *                                 non-zero if errors were encountered
1384  * Output:              None
1385  * Return value:        None
1386  */
1387 static TW_VOID
1388 twa_map_load_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1389         TW_INT32 nsegments, TW_INT32 error)
1390 {
1391         *((bus_addr_t *)arg) = segs[0].ds_addr;
1392 }
1393
1394
1395
1396 /*
1397  * Function name:       tw_osli_map_request
1398  * Description:         Maps a cmd pkt and data associated with it, into
1399  *                      DMA'able memory.
1400  *
1401  * Input:               req     -- ptr to request pkt
1402  * Output:              None
1403  * Return value:        0       -- success
1404  *                      non-zero-- failure
1405  */
1406 TW_INT32
1407 tw_osli_map_request(struct tw_osli_req_context *req)
1408 {
1409         struct twa_softc        *sc = req->ctlr;
1410         TW_INT32                error = 0;
1411
1412         tw_osli_dbg_dprintf(10, sc, "entered");
1413
1414         /* If the command involves data, map that too. */
1415         if (req->data != NULL) {
1416                 /*
1417                  * It's sufficient for the data pointer to be 4-byte aligned
1418                  * to work with 9000.  However, if 4-byte aligned addresses
1419                  * are passed to bus_dmamap_load, we can get back sg elements
1420                  * that are not 512-byte multiples in size.  So, we will let
1421                  * only those buffers that are 512-byte aligned to pass
1422                  * through, and bounce the rest, so as to make sure that we
1423                  * always get back sg elements that are 512-byte multiples
1424                  * in size.
1425                  */
1426                 if (((vm_offset_t)req->data % sc->sg_size_factor) ||
1427                         (req->length % sc->sg_size_factor)) {
1428                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED;
1429                         /* Save original data pointer and length. */
1430                         req->real_data = req->data;
1431                         req->real_length = req->length;
1432                         req->length = (req->length +
1433                                 (sc->sg_size_factor - 1)) &
1434                                 ~(sc->sg_size_factor - 1);
1435                         req->data = malloc(req->length, TW_OSLI_MALLOC_CLASS,
1436                                         M_NOWAIT);
1437                         if (req->data == NULL) {
1438                                 tw_osli_printf(sc, "error = %d",
1439                                         TW_CL_SEVERITY_ERROR_STRING,
1440                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1441                                         0x201E,
1442                                         "Failed to allocate memory "
1443                                         "for bounce buffer",
1444                                         ENOMEM);
1445                                 /* Restore original data pointer and length. */
1446                                 req->data = req->real_data;
1447                                 req->length = req->real_length;
1448                                 return(ENOMEM);
1449                         }
1450                 }
1451
1452                 /*
1453                  * Map the data buffer into bus space and build the SG list.
1454                  */
1455                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1456                         /* Lock against multiple simultaneous ioctl calls. */
1457                         mtx_lock_spin(sc->io_lock);
1458                         error = bus_dmamap_load(sc->ioctl_tag, sc->ioctl_map,
1459                                 req->data, req->length,
1460                                 twa_map_load_data_callback, req,
1461                                 BUS_DMA_WAITOK);
1462                         mtx_unlock_spin(sc->io_lock);
1463                 } else if (req->flags & TW_OSLI_REQ_FLAGS_CCB) {
1464                         error = bus_dmamap_load_ccb(sc->dma_tag, req->dma_map,
1465                                 req->orig_req, twa_map_load_data_callback, req,
1466                                 BUS_DMA_WAITOK);
1467                 } else {
1468                         /*
1469                          * There's only one CAM I/O thread running at a time.
1470                          * So, there's no need to hold the io_lock.
1471                          */
1472                         error = bus_dmamap_load(sc->dma_tag, req->dma_map,
1473                                 req->data, req->length,
1474                                 twa_map_load_data_callback, req,
1475                                 BUS_DMA_WAITOK);
1476                 }
1477
1478                 if (!error)
1479                         error = req->error_code;
1480                 else {
1481                         if (error == EINPROGRESS) {
1482                                 /*
1483                                  * Specifying sc->io_lock as the lockfuncarg
1484                                  * in ...tag_create should protect the access
1485                                  * of ...FLAGS_MAPPED from the callback.
1486                                  */
1487                                 mtx_lock_spin(sc->io_lock);
1488                                 if (!(req->flags & TW_OSLI_REQ_FLAGS_MAPPED))
1489                                         req->flags |= TW_OSLI_REQ_FLAGS_IN_PROGRESS;
1490                                 tw_osli_disallow_new_requests(sc, &(req->req_handle));
1491                                 mtx_unlock_spin(sc->io_lock);
1492                                 error = 0;
1493                         } else {
1494                                 tw_osli_printf(sc, "error = %d",
1495                                         TW_CL_SEVERITY_ERROR_STRING,
1496                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1497                                         0x9999,
1498                                         "Failed to map DMA memory "
1499                                         "for I/O request",
1500                                         error);
1501                                 req->flags |= TW_OSLI_REQ_FLAGS_FAILED;
1502                                 /* Free alignment buffer if it was used. */
1503                                 if (req->flags &
1504                                         TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1505                                         free(req->data, TW_OSLI_MALLOC_CLASS);
1506                                         /*
1507                                          * Restore original data pointer
1508                                          * and length.
1509                                          */
1510                                         req->data = req->real_data;
1511                                         req->length = req->real_length;
1512                                 }
1513                         }
1514                 }
1515
1516         } else {
1517                 /* Mark the request as currently being processed. */
1518                 req->state = TW_OSLI_REQ_STATE_BUSY;
1519                 /* Move the request into the busy queue. */
1520                 tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1521                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU)
1522                         error = tw_cl_fw_passthru(&sc->ctlr_handle,
1523                                         &(req->req_pkt), &(req->req_handle));
1524                 else
1525                         error = tw_cl_start_io(&sc->ctlr_handle,
1526                                         &(req->req_pkt), &(req->req_handle));
1527                 if (error) {
1528                         req->error_code = error;
1529                         req->req_pkt.tw_osl_callback(&(req->req_handle));
1530                 }
1531         }
1532         return(error);
1533 }
1534
1535
1536
1537 /*
1538  * Function name:       tw_osli_unmap_request
1539  * Description:         Undoes the mapping done by tw_osli_map_request.
1540  *
1541  * Input:               req     -- ptr to request pkt
1542  * Output:              None
1543  * Return value:        None
1544  */
1545 TW_VOID
1546 tw_osli_unmap_request(struct tw_osli_req_context *req)
1547 {
1548         struct twa_softc        *sc = req->ctlr;
1549
1550         tw_osli_dbg_dprintf(10, sc, "entered");
1551
1552         /* If the command involved data, unmap that too. */
1553         if (req->data != NULL) {
1554                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1555                         /* Lock against multiple simultaneous ioctl calls. */
1556                         mtx_lock_spin(sc->io_lock);
1557
1558                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1559                                 bus_dmamap_sync(sc->ioctl_tag,
1560                                         sc->ioctl_map, BUS_DMASYNC_POSTREAD);
1561
1562                                 /*
1563                                  * If we are using a bounce buffer, and we are
1564                                  * reading data, copy the real data in.
1565                                  */
1566                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1567                                         bcopy(req->data, req->real_data,
1568                                                 req->real_length);
1569                         }
1570
1571                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1572                                 bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1573                                         BUS_DMASYNC_POSTWRITE);
1574
1575                         bus_dmamap_unload(sc->ioctl_tag, sc->ioctl_map);
1576
1577                         mtx_unlock_spin(sc->io_lock);
1578                 } else {
1579                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1580                                 bus_dmamap_sync(sc->dma_tag,
1581                                         req->dma_map, BUS_DMASYNC_POSTREAD);
1582
1583                                 /*
1584                                  * If we are using a bounce buffer, and we are
1585                                  * reading data, copy the real data in.
1586                                  */
1587                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1588                                         bcopy(req->data, req->real_data,
1589                                                 req->real_length);
1590                         }
1591                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1592                                 bus_dmamap_sync(sc->dma_tag, req->dma_map,
1593                                         BUS_DMASYNC_POSTWRITE);
1594
1595                         bus_dmamap_unload(sc->dma_tag, req->dma_map);
1596                 }
1597         }
1598
1599         /* Free alignment buffer if it was used. */
1600         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1601                 free(req->data, TW_OSLI_MALLOC_CLASS);
1602                 /* Restore original data pointer and length. */
1603                 req->data = req->real_data;
1604                 req->length = req->real_length;
1605         }
1606 }
1607
1608
1609
1610 #ifdef TW_OSL_DEBUG
1611
1612 TW_VOID twa_report_stats(TW_VOID);
1613 TW_VOID twa_reset_stats(TW_VOID);
1614 TW_VOID tw_osli_print_ctlr_stats(struct twa_softc *sc);
1615 TW_VOID twa_print_req_info(struct tw_osli_req_context *req);
1616
1617
1618 /*
1619  * Function name:       twa_report_stats
1620  * Description:         For being called from ddb.  Calls functions that print
1621  *                      OSL and CL internal stats for the controller.
1622  *
1623  * Input:               None
1624  * Output:              None
1625  * Return value:        None
1626  */
1627 TW_VOID
1628 twa_report_stats(TW_VOID)
1629 {
1630         struct twa_softc        *sc;
1631         TW_INT32                i;
1632
1633         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1634                 tw_osli_print_ctlr_stats(sc);
1635                 tw_cl_print_ctlr_stats(&sc->ctlr_handle);
1636         }
1637 }
1638
1639
1640
1641 /*
1642  * Function name:       tw_osli_print_ctlr_stats
1643  * Description:         For being called from ddb.  Prints OSL controller stats
1644  *
1645  * Input:               sc      -- ptr to OSL internal controller context
1646  * Output:              None
1647  * Return value:        None
1648  */
1649 TW_VOID
1650 tw_osli_print_ctlr_stats(struct twa_softc *sc)
1651 {
1652         twa_printf(sc, "osl_ctlr_ctxt = %p\n", sc);
1653         twa_printf(sc, "OSLq type  current  max\n");
1654         twa_printf(sc, "free      %04d     %04d\n",
1655                 sc->q_stats[TW_OSLI_FREE_Q].cur_len,
1656                 sc->q_stats[TW_OSLI_FREE_Q].max_len);
1657         twa_printf(sc, "busy      %04d     %04d\n",
1658                 sc->q_stats[TW_OSLI_BUSY_Q].cur_len,
1659                 sc->q_stats[TW_OSLI_BUSY_Q].max_len);
1660 }
1661
1662
1663
1664 /*
1665  * Function name:       twa_print_req_info
1666  * Description:         For being called from ddb.  Calls functions that print
1667  *                      OSL and CL internal details for the request.
1668  *
1669  * Input:               req     -- ptr to OSL internal request context
1670  * Output:              None
1671  * Return value:        None
1672  */
1673 TW_VOID
1674 twa_print_req_info(struct tw_osli_req_context *req)
1675 {
1676         struct twa_softc        *sc = req->ctlr;
1677
1678         twa_printf(sc, "OSL details for request:\n");
1679         twa_printf(sc, "osl_req_ctxt = %p, cl_req_ctxt = %p\n"
1680                 "data = %p, length = 0x%x, real_data = %p, real_length = 0x%x\n"
1681                 "state = 0x%x, flags = 0x%x, error = 0x%x, orig_req = %p\n"
1682                 "next_req = %p, prev_req = %p, dma_map = %p\n",
1683                 req->req_handle.osl_req_ctxt, req->req_handle.cl_req_ctxt,
1684                 req->data, req->length, req->real_data, req->real_length,
1685                 req->state, req->flags, req->error_code, req->orig_req,
1686                 req->link.next, req->link.prev, req->dma_map);
1687         tw_cl_print_req_info(&(req->req_handle));
1688 }
1689
1690
1691
1692 /*
1693  * Function name:       twa_reset_stats
1694  * Description:         For being called from ddb.
1695  *                      Resets some OSL controller stats.
1696  *
1697  * Input:               None
1698  * Output:              None
1699  * Return value:        None
1700  */
1701 TW_VOID
1702 twa_reset_stats(TW_VOID)
1703 {
1704         struct twa_softc        *sc;
1705         TW_INT32                i;
1706
1707         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1708                 sc->q_stats[TW_OSLI_FREE_Q].max_len = 0;
1709                 sc->q_stats[TW_OSLI_BUSY_Q].max_len = 0;
1710                 tw_cl_reset_stats(&sc->ctlr_handle);
1711         }
1712 }
1713
1714 #endif /* TW_OSL_DEBUG */