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  *      $FreeBSD$
  30  */
  31
  32 /*
  33  * AMCC'S 3ware driver for 9000 series storage controllers.
  34  *
  35  * Author: Vinod Kashyap
  36  * Modifications by: Adam Radford
  37  * Modifications by: Manjunath Ranganathaiah
  38  */
  39
  40
  41 /*
  42  * FreeBSD specific functions not related to CAM, and other
  43  * miscellaneous functions.
  44  */
  45
  46
  47 #include <dev/twa/tw_osl_includes.h>
  48 #include <dev/twa/tw_cl_fwif.h>
  49 #include <dev/twa/tw_cl_ioctl.h>
  50 #include <dev/twa/tw_osl_ioctl.h>
  51
  52 #ifdef TW_OSL_DEBUG
  53 TW_INT32        TW_DEBUG_LEVEL_FOR_OSL = TW_OSL_DEBUG;
  54 TW_INT32        TW_OSL_DEBUG_LEVEL_FOR_CL = TW_OSL_DEBUG;
  55 #endif /* TW_OSL_DEBUG */
  56
  57 MALLOC_DEFINE(TW_OSLI_MALLOC_CLASS, "twa_commands", "twa commands");
  58
  59
  60 static  d_open_t                twa_open;
  61 static  d_close_t               twa_close;
  62 static  d_ioctl_t               twa_ioctl;
  63
  64 static struct cdevsw twa_cdevsw = {
  65         .d_version =    D_VERSION,
  66         .d_open =       twa_open,
  67         .d_close =      twa_close,
  68         .d_ioctl =      twa_ioctl,
  69         .d_name =       "twa",
  70 };
  71
  72 static devclass_t       twa_devclass;
  73
  74
  75 /*
  76  * Function name:       twa_open
  77  * Description:         Called when the controller is opened.
  78  *                      Simply marks the controller as open.
  79  *
  80  * Input:               dev     -- control device corresponding to the ctlr
  81  *                      flags   -- mode of open
  82  *                      fmt     -- device type (character/block etc.)
  83  *                      proc    -- current process
  84  * Output:              None
  85  * Return value:        0       -- success
  86  *                      non-zero-- failure
  87  */
  88 static TW_INT32
  89 twa_open(struct cdev *dev, TW_INT32 flags, TW_INT32 fmt, struct thread *proc)
  90 {
  91         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
  92
  93         tw_osli_dbg_dprintf(5, sc, "entered");
  94         sc->open = TW_CL_TRUE;
  95         return(0);
  96 }
  97
  98
  99
 100 /*
 101  * Function name:       twa_close
 102  * Description:         Called when the controller is closed.
 103  *                      Simply marks the controller as not open.
 104  *
 105  * Input:               dev     -- control device corresponding to the ctlr
 106  *                      flags   -- mode of corresponding open
 107  *                      fmt     -- device type (character/block etc.)
 108  *                      proc    -- current process
 109  * Output:              None
 110  * Return value:        0       -- success
 111  *                      non-zero-- failure
 112  */
 113 static TW_INT32
 114 twa_close(struct cdev *dev, TW_INT32 flags, TW_INT32 fmt, struct thread *proc)
 115 {
 116         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 117
 118         tw_osli_dbg_dprintf(5, sc, "entered");
 119         sc->open = TW_CL_FALSE;
 120         return(0);
 121 }
 122
 123
 124
 125 /*
 126  * Function name:       twa_ioctl
 127  * Description:         Called when an ioctl is posted to the controller.
 128  *                      Handles any OS Layer specific cmds, passes the rest
 129  *                      on to the Common Layer.
 130  *
 131  * Input:               dev     -- control device corresponding to the ctlr
 132  *                      cmd     -- ioctl cmd
 133  *                      buf     -- ptr to buffer in kernel memory, which is
 134  *                                 a copy of the input buffer in user-space
 135  *                      flags   -- mode of corresponding open
 136  *                      proc    -- current process
 137  * Output:              buf     -- ptr to buffer in kernel memory, which will
 138  *                                 be copied to the output buffer in user-space
 139  * Return value:        0       -- success
 140  *                      non-zero-- failure
 141  */
 142 static TW_INT32
 143 twa_ioctl(struct cdev *dev, u_long cmd, caddr_t buf, TW_INT32 flags, struct thread *proc)
 144 {
 145         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 146         TW_INT32                error;
 147
 148         tw_osli_dbg_dprintf(5, sc, "entered");
 149
 150         switch (cmd) {
 151         case TW_OSL_IOCTL_FIRMWARE_PASS_THROUGH:
 152                 tw_osli_dbg_dprintf(6, sc, "ioctl: fw_passthru");
 153                 error = tw_osli_fw_passthru(sc, (TW_INT8 *)buf);
 154                 break;
 155
 156         case TW_OSL_IOCTL_SCAN_BUS:
 157                 /* Request CAM for a bus scan. */
 158                 tw_osli_dbg_dprintf(6, sc, "ioctl: scan bus");
 159                 error = tw_osli_request_bus_scan(sc);
 160                 break;
 161
 162         default:
 163                 tw_osli_dbg_dprintf(6, sc, "ioctl: 0x%lx", cmd);
 164                 error = tw_cl_ioctl(&sc->ctlr_handle, cmd, buf);
 165                 break;
 166         }
 167         return(error);
 168 }
 169
 170
 171
 172 static TW_INT32 twa_probe(device_t dev);
 173 static TW_INT32 twa_attach(device_t dev);
 174 static TW_INT32 twa_detach(device_t dev);
 175 static TW_INT32 twa_shutdown(device_t dev);
 176 static TW_VOID  twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op);
 177 static TW_VOID  twa_pci_intr(TW_VOID *arg);
 178 static TW_VOID  twa_watchdog(TW_VOID *arg);
 179 int twa_setup_intr(struct twa_softc *sc);
 180 int twa_teardown_intr(struct twa_softc *sc);
 181
 182 static TW_INT32 tw_osli_alloc_mem(struct twa_softc *sc);
 183 static TW_VOID  tw_osli_free_resources(struct twa_softc *sc);
 184
 185 static TW_VOID  twa_map_load_data_callback(TW_VOID *arg,
 186         bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
 187 static TW_VOID  twa_map_load_callback(TW_VOID *arg,
 188         bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
 189
 190
 191 static device_method_t  twa_methods[] = {
 192         /* Device interface */
 193         DEVMETHOD(device_probe,         twa_probe),
 194         DEVMETHOD(device_attach,        twa_attach),
 195         DEVMETHOD(device_detach,        twa_detach),
 196         DEVMETHOD(device_shutdown,      twa_shutdown),
 197
 198         DEVMETHOD(bus_print_child,      bus_generic_print_child),
 199         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
 200         {0, 0}
 201 };
 202
 203 static driver_t twa_pci_driver = {
 204         "twa",
 205         twa_methods,
 206         sizeof(struct twa_softc)
 207 };
 208
 209 DRIVER_MODULE(twa, pci, twa_pci_driver, twa_devclass, 0, 0);
 210 MODULE_DEPEND(twa, cam, 1, 1, 1);
 211 MODULE_DEPEND(twa, pci, 1, 1, 1);
 212
 213
 214 /*
 215  * Function name:       twa_probe
 216  * Description:         Called at driver load time.  Claims 9000 ctlrs.
 217  *
 218  * Input:               dev     -- bus device corresponding to the ctlr
 219  * Output:              None
 220  * Return value:        <= 0    -- success
 221  *                      > 0     -- failure
 222  */
 223 static TW_INT32
 224 twa_probe(device_t dev)
 225 {
 226         static TW_UINT8 first_ctlr = 1;
 227
 228         tw_osli_dbg_printf(3, "entered");
 229
 230         if (tw_cl_ctlr_supported(pci_get_vendor(dev), pci_get_device(dev))) {
 231                 device_set_desc(dev, TW_OSLI_DEVICE_NAME);
 232                 /* Print the driver version only once. */
 233                 if (first_ctlr) {
 234                         printf("3ware device driver for 9000 series storage "
 235                                 "controllers, version: %s\n",
 236                                 TW_OSL_DRIVER_VERSION_STRING);
 237                         first_ctlr = 0;
 238                 }
 239                 return(0);
 240         }
 241         return(ENXIO);
 242 }
 243
 244 int twa_setup_intr(struct twa_softc *sc)
 245 {
 246         int error = 0;
 247
 248         if (!(sc->intr_handle) && (sc->irq_res)) {
 249                 error = bus_setup_intr(sc->bus_dev, sc->irq_res,
 250                                         INTR_TYPE_CAM | INTR_MPSAFE,
 251                                         NULL, twa_pci_intr,
 252                                         sc, &sc->intr_handle);
 253         }
 254         return( error );
 255 }
 256
 257
 258 int twa_teardown_intr(struct twa_softc *sc)
 259 {
 260         int error = 0;
 261
 262         if ((sc->intr_handle) && (sc->irq_res)) {
 263                 error = bus_teardown_intr(sc->bus_dev,
 264                                                 sc->irq_res, sc->intr_handle);
 265                 sc->intr_handle = NULL;
 266         }
 267         return( error );
 268 }
 269
 270
 271
 272 /*
 273  * Function name:       twa_attach
 274  * Description:         Allocates pci resources; updates sc; adds a node to the
 275  *                      sysctl tree to expose the driver version; makes calls
 276  *                      (to the Common Layer) to initialize ctlr, and to
 277  *                      attach to CAM.
 278  *
 279  * Input:               dev     -- bus device corresponding to the ctlr
 280  * Output:              None
 281  * Return value:        0       -- success
 282  *                      non-zero-- failure
 283  */
 284 static TW_INT32
 285 twa_attach(device_t dev)
 286 {
 287         struct twa_softc        *sc = device_get_softc(dev);
 288         TW_UINT32               command;
 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,
 313                 device_get_nameunit(dev), CTLFLAG_RD, 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         /* Make sure we are going to be able to talk to this board. */
 328         command = pci_read_config(dev, PCIR_COMMAND, 2);
 329         if ((command & PCIM_CMD_PORTEN) == 0) {
 330                 tw_osli_printf(sc, "error = %d",
 331                         TW_CL_SEVERITY_ERROR_STRING,
 332                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 333                         0x2001,
 334                         "Register window not available",
 335                         ENXIO);
 336                 tw_osli_free_resources(sc);
 337                 return(ENXIO);
 338         }
 339
 340         /* Force the busmaster enable bit on, in case the BIOS forgot. */
 341         command |= PCIM_CMD_BUSMASTEREN;
 342         pci_write_config(dev, PCIR_COMMAND, command, 2);
 343
 344         /* Allocate the PCI register window. */
 345         if ((error = tw_cl_get_pci_bar_info(sc->device_id, TW_CL_BAR_TYPE_MEM,
 346                 &bar_num, &bar0_offset, &bar_size))) {
 347                 tw_osli_printf(sc, "error = %d",
 348                         TW_CL_SEVERITY_ERROR_STRING,
 349                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 350                         0x201F,
 351                         "Can't get PCI BAR info",
 352                         error);
 353                 tw_osli_free_resources(sc);
 354                 return(error);
 355         }
 356         sc->reg_res_id = PCIR_BARS + bar0_offset;
 357         if ((sc->reg_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
 358                                 &(sc->reg_res_id), 0, ~0, 1, RF_ACTIVE))
 359                                 == NULL) {
 360                 tw_osli_printf(sc, "error = %d",
 361                         TW_CL_SEVERITY_ERROR_STRING,
 362                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 363                         0x2002,
 364                         "Can't allocate register window",
 365                         ENXIO);
 366                 tw_osli_free_resources(sc);
 367                 return(ENXIO);
 368         }
 369         sc->bus_tag = rman_get_bustag(sc->reg_res);
 370         sc->bus_handle = rman_get_bushandle(sc->reg_res);
 371
 372         /* Allocate and register our interrupt. */
 373         sc->irq_res_id = 0;
 374         if ((sc->irq_res = bus_alloc_resource(sc->bus_dev, SYS_RES_IRQ,
 375                                 &(sc->irq_res_id), 0, ~0, 1,
 376                                 RF_SHAREABLE | RF_ACTIVE)) == NULL) {
 377                 tw_osli_printf(sc, "error = %d",
 378                         TW_CL_SEVERITY_ERROR_STRING,
 379                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 380                         0x2003,
 381                         "Can't allocate interrupt",
 382                         ENXIO);
 383                 tw_osli_free_resources(sc);
 384                 return(ENXIO);
 385         }
 386         if ((error = twa_setup_intr(sc))) {
 387                 tw_osli_printf(sc, "error = %d",
 388                         TW_CL_SEVERITY_ERROR_STRING,
 389                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 390                         0x2004,
 391                         "Can't set up interrupt",
 392                         error);
 393                 tw_osli_free_resources(sc);
 394                 return(error);
 395         }
 396
 397         if ((error = tw_osli_alloc_mem(sc))) {
 398                 tw_osli_printf(sc, "error = %d",
 399                         TW_CL_SEVERITY_ERROR_STRING,
 400                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 401                         0x2005,
 402                         "Memory allocation failure",
 403                         error);
 404                 tw_osli_free_resources(sc);
 405                 return(error);
 406         }
 407
 408         /* Initialize the Common Layer for this controller. */
 409         if ((error = tw_cl_init_ctlr(&sc->ctlr_handle, sc->flags, sc->device_id,
 410                         TW_OSLI_MAX_NUM_REQUESTS, TW_OSLI_MAX_NUM_AENS,
 411                         sc->non_dma_mem, sc->dma_mem,
 412                         sc->dma_mem_phys
 413                         ))) {
 414                 tw_osli_printf(sc, "error = %d",
 415                         TW_CL_SEVERITY_ERROR_STRING,
 416                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 417                         0x2006,
 418                         "Failed to initialize Common Layer/controller",
 419                         error);
 420                 tw_osli_free_resources(sc);
 421                 return(error);
 422         }
 423
 424         /* Create the control device. */
 425         sc->ctrl_dev = make_dev(&twa_cdevsw, device_get_unit(sc->bus_dev),
 426                         UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR,
 427                         "twa%d", device_get_unit(sc->bus_dev));
 428         sc->ctrl_dev->si_drv1 = sc;
 429
 430         if ((error = tw_osli_cam_attach(sc))) {
 431                 tw_osli_free_resources(sc);
 432                 tw_osli_printf(sc, "error = %d",
 433                         TW_CL_SEVERITY_ERROR_STRING,
 434                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 435                         0x2007,
 436                         "Failed to initialize CAM",
 437                         error);
 438                 return(error);
 439         }
 440
 441         sc->watchdog_index = 0;
 442         callout_init(&(sc->watchdog_callout[0]), CALLOUT_MPSAFE);
 443         callout_init(&(sc->watchdog_callout[1]), CALLOUT_MPSAFE);
 444         callout_reset(&(sc->watchdog_callout[0]), 5*hz, twa_watchdog, &sc->ctlr_handle);
 445
 446         return(0);
 447 }
 448
 449
 450 static TW_VOID
 451 twa_watchdog(TW_VOID *arg)
 452 {
 453         struct tw_cl_ctlr_handle *ctlr_handle =
 454                 (struct tw_cl_ctlr_handle *)arg;
 455         struct twa_softc                *sc = ctlr_handle->osl_ctlr_ctxt;
 456         int                             i;
 457         int                             i_need_a_reset = 0;
 458         int                             driver_is_active = 0;
 459         int                             my_watchdog_was_pending = 1234;
 460         TW_UINT64                       current_time;
 461         struct tw_osli_req_context      *my_req;
 462
 463
 464 //==============================================================================
 465         current_time = (TW_UINT64) (tw_osl_get_local_time());
 466
 467         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 468                 my_req = &(sc->req_ctx_buf[i]);
 469
 470                 if ((my_req->state == TW_OSLI_REQ_STATE_BUSY) &&
 471                         (my_req->deadline) &&
 472                         (my_req->deadline < current_time)) {
 473                         tw_cl_set_reset_needed(ctlr_handle);
 474 #ifdef    TW_OSL_DEBUG
 475                         device_printf((sc)->bus_dev, "Request %d timed out! d = %llu, c = %llu\n", i, my_req->deadline, current_time);
 476 #else  /* TW_OSL_DEBUG */
 477                         device_printf((sc)->bus_dev, "Request %d timed out!\n", i);
 478 #endif /* TW_OSL_DEBUG */
 479                         break;
 480                 }
 481         }
 482 //==============================================================================
 483
 484         i_need_a_reset = tw_cl_is_reset_needed(ctlr_handle);
 485
 486         i = (int) ((sc->watchdog_index++) & 1);
 487
 488         driver_is_active = tw_cl_is_active(ctlr_handle);
 489
 490         if (i_need_a_reset) {
 491 #ifdef    TW_OSL_DEBUG
 492                 device_printf((sc)->bus_dev, "Watchdog rescheduled in 70 seconds\n");
 493 #endif /* TW_OSL_DEBUG */
 494                 my_watchdog_was_pending =
 495                         callout_reset(&(sc->watchdog_callout[i]), 70*hz, twa_watchdog, &sc->ctlr_handle);
 496                 tw_cl_reset_ctlr(ctlr_handle);
 497 #ifdef    TW_OSL_DEBUG
 498                 device_printf((sc)->bus_dev, "Watchdog reset completed!\n");
 499 #endif /* TW_OSL_DEBUG */
 500         } else if (driver_is_active) {
 501                 my_watchdog_was_pending =
 502                         callout_reset(&(sc->watchdog_callout[i]),  5*hz, twa_watchdog, &sc->ctlr_handle);
 503         }
 504 #ifdef    TW_OSL_DEBUG
 505         if (i_need_a_reset || my_watchdog_was_pending)
 506                 device_printf((sc)->bus_dev, "i_need_a_reset = %d, "
 507                 "driver_is_active = %d, my_watchdog_was_pending = %d\n",
 508                 i_need_a_reset, driver_is_active, my_watchdog_was_pending);
 509 #endif /* TW_OSL_DEBUG */
 510 }
 511
 512
 513 /*
 514  * Function name:       tw_osli_alloc_mem
 515  * Description:         Allocates memory needed both by CL and OSL.
 516  *
 517  * Input:               sc      -- OSL internal controller context
 518  * Output:              None
 519  * Return value:        0       -- success
 520  *                      non-zero-- failure
 521  */
 522 static TW_INT32
 523 tw_osli_alloc_mem(struct twa_softc *sc)
 524 {
 525         struct tw_osli_req_context      *req;
 526         TW_UINT32                       max_sg_elements;
 527         TW_UINT32                       non_dma_mem_size;
 528         TW_UINT32                       dma_mem_size;
 529         TW_INT32                        error;
 530         TW_INT32                        i;
 531
 532         tw_osli_dbg_dprintf(3, sc, "entered");
 533
 534         sc->flags |= (sizeof(bus_addr_t) == 8) ? TW_CL_64BIT_ADDRESSES : 0;
 535         sc->flags |= (sizeof(bus_size_t) == 8) ? TW_CL_64BIT_SG_LENGTH : 0;
 536
 537         max_sg_elements = (sizeof(bus_addr_t) == 8) ?
 538                 TW_CL_MAX_64BIT_SG_ELEMENTS : TW_CL_MAX_32BIT_SG_ELEMENTS;
 539
 540         if ((error = tw_cl_get_mem_requirements(&sc->ctlr_handle, sc->flags,
 541                         sc->device_id, TW_OSLI_MAX_NUM_REQUESTS,  TW_OSLI_MAX_NUM_AENS,
 542                         &(sc->alignment), &(sc->sg_size_factor),
 543                         &non_dma_mem_size, &dma_mem_size
 544                         ))) {
 545                 tw_osli_printf(sc, "error = %d",
 546                         TW_CL_SEVERITY_ERROR_STRING,
 547                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 548                         0x2008,
 549                         "Can't get Common Layer's memory requirements",
 550                         error);
 551                 return(error);
 552         }
 553
 554         if ((sc->non_dma_mem = malloc(non_dma_mem_size, TW_OSLI_MALLOC_CLASS,
 555                                 M_WAITOK)) == NULL) {
 556                 tw_osli_printf(sc, "error = %d",
 557                         TW_CL_SEVERITY_ERROR_STRING,
 558                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 559                         0x2009,
 560                         "Can't allocate non-dma memory",
 561                         ENOMEM);
 562                 return(ENOMEM);
 563         }
 564
 565         /* Create the parent dma tag. */
 566         if (bus_dma_tag_create(NULL,                    /* parent */
 567                                 sc->alignment,          /* alignment */
 568                                 TW_OSLI_DMA_BOUNDARY,   /* boundary */
 569                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 570                                 BUS_SPACE_MAXADDR,      /* highaddr */
 571                                 NULL, NULL,             /* filter, filterarg */
 572                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 573                                 max_sg_elements,        /* nsegments */
 574                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 575                                 0,                      /* flags */
 576                                 NULL,                   /* lockfunc */
 577                                 NULL,                   /* lockfuncarg */
 578                                 &sc->parent_tag         /* tag */)) {
 579                 tw_osli_printf(sc, "error = %d",
 580                         TW_CL_SEVERITY_ERROR_STRING,
 581                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 582                         0x200A,
 583                         "Can't allocate parent DMA tag",
 584                         ENOMEM);
 585                 return(ENOMEM);
 586         }
 587
 588         /* Create a dma tag for Common Layer's DMA'able memory (dma_mem). */
 589         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 590                                 sc->alignment,          /* alignment */
 591                                 0,                      /* boundary */
 592                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 593                                 BUS_SPACE_MAXADDR,      /* highaddr */
 594                                 NULL, NULL,             /* filter, filterarg */
 595                                 dma_mem_size,           /* maxsize */
 596                                 1,                      /* nsegments */
 597                                 BUS_SPACE_MAXSIZE,      /* maxsegsize */
 598                                 0,                      /* flags */
 599                                 NULL,                   /* lockfunc */
 600                                 NULL,                   /* lockfuncarg */
 601                                 &sc->cmd_tag            /* tag */)) {
 602                 tw_osli_printf(sc, "error = %d",
 603                         TW_CL_SEVERITY_ERROR_STRING,
 604                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 605                         0x200B,
 606                         "Can't allocate DMA tag for Common Layer's "
 607                         "DMA'able memory",
 608                         ENOMEM);
 609                 return(ENOMEM);
 610         }
 611
 612         if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 613                 BUS_DMA_NOWAIT, &sc->cmd_map)) {
 614                 /* Try a second time. */
 615                 if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 616                         BUS_DMA_NOWAIT, &sc->cmd_map)) {
 617                         tw_osli_printf(sc, "error = %d",
 618                                 TW_CL_SEVERITY_ERROR_STRING,
 619                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 620                                 0x200C,
 621                                 "Can't allocate DMA'able memory for the"
 622                                 "Common Layer",
 623                                 ENOMEM);
 624                         return(ENOMEM);
 625                 }
 626         }
 627
 628         bus_dmamap_load(sc->cmd_tag, sc->cmd_map, sc->dma_mem,
 629                 dma_mem_size, twa_map_load_callback,
 630                 &sc->dma_mem_phys, 0);
 631
 632         /*
 633          * Create a dma tag for data buffers; size will be the maximum
 634          * possible I/O size (128kB).
 635          */
 636         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 637                                 sc->alignment,          /* alignment */
 638                                 0,                      /* boundary */
 639                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 640                                 BUS_SPACE_MAXADDR,      /* highaddr */
 641                                 NULL, NULL,             /* filter, filterarg */
 642                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 643                                 max_sg_elements,        /* nsegments */
 644                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 645                                 BUS_DMA_ALLOCNOW,       /* flags */
 646                                 twa_busdma_lock,        /* lockfunc */
 647                                 sc->io_lock,            /* lockfuncarg */
 648                                 &sc->dma_tag            /* tag */)) {
 649                 tw_osli_printf(sc, "error = %d",
 650                         TW_CL_SEVERITY_ERROR_STRING,
 651                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 652                         0x200F,
 653                         "Can't allocate DMA tag for data buffers",
 654                         ENOMEM);
 655                 return(ENOMEM);
 656         }
 657
 658         /*
 659          * Create a dma tag for ioctl data buffers; size will be the maximum
 660          * possible I/O size (128kB).
 661          */
 662         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 663                                 sc->alignment,          /* alignment */
 664                                 0,                      /* boundary */
 665                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 666                                 BUS_SPACE_MAXADDR,      /* highaddr */
 667                                 NULL, NULL,             /* filter, filterarg */
 668                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 669                                 max_sg_elements,        /* nsegments */
 670                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 671                                 BUS_DMA_ALLOCNOW,       /* flags */
 672                                 twa_busdma_lock,        /* lockfunc */
 673                                 sc->io_lock,            /* lockfuncarg */
 674                                 &sc->ioctl_tag          /* tag */)) {
 675                 tw_osli_printf(sc, "error = %d",
 676                         TW_CL_SEVERITY_ERROR_STRING,
 677                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 678                         0x2010,
 679                         "Can't allocate DMA tag for ioctl data buffers",
 680                         ENOMEM);
 681                 return(ENOMEM);
 682         }
 683
 684         /* Create just one map for all ioctl request data buffers. */
 685         if (bus_dmamap_create(sc->ioctl_tag, 0, &sc->ioctl_map)) {
 686                 tw_osli_printf(sc, "error = %d",
 687                         TW_CL_SEVERITY_ERROR_STRING,
 688                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 689                         0x2011,
 690                         "Can't create ioctl map",
 691                         ENOMEM);
 692                 return(ENOMEM);
 693         }
 694
 695
 696         /* Initialize request queues. */
 697         tw_osli_req_q_init(sc, TW_OSLI_FREE_Q);
 698         tw_osli_req_q_init(sc, TW_OSLI_BUSY_Q);
 699
 700         if ((sc->req_ctx_buf = (struct tw_osli_req_context *)
 701                         malloc((sizeof(struct tw_osli_req_context) *
 702                                 TW_OSLI_MAX_NUM_REQUESTS),
 703                                 TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
 704                 tw_osli_printf(sc, "error = %d",
 705                         TW_CL_SEVERITY_ERROR_STRING,
 706                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 707                         0x2012,
 708                         "Failed to allocate request packets",
 709                         ENOMEM);
 710                 return(ENOMEM);
 711         }
 712         bzero(sc->req_ctx_buf,
 713                 sizeof(struct tw_osli_req_context) * TW_OSLI_MAX_NUM_REQUESTS);
 714
 715         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 716                 req = &(sc->req_ctx_buf[i]);
 717                 req->ctlr = sc;
 718                 if (bus_dmamap_create(sc->dma_tag, 0, &req->dma_map)) {
 719                         tw_osli_printf(sc, "request # = %d, error = %d",
 720                                 TW_CL_SEVERITY_ERROR_STRING,
 721                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 722                                 0x2013,
 723                                 "Can't create dma map",
 724                                 i, ENOMEM);
 725                         return(ENOMEM);
 726                 }
 727
 728                 /* Initialize the ioctl wakeup/ timeout mutex */
 729                 req->ioctl_wake_timeout_lock = &(req->ioctl_wake_timeout_lock_handle);
 730                 mtx_init(req->ioctl_wake_timeout_lock, "tw_ioctl_wake_timeout_lock", NULL, MTX_DEF);
 731
 732                 /* Insert request into the free queue. */
 733                 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 734         }
 735
 736         return(0);
 737 }
 738
 739
 740
 741 /*
 742  * Function name:       tw_osli_free_resources
 743  * Description:         Performs clean-up at the time of going down.
 744  *
 745  * Input:               sc      -- ptr to OSL internal ctlr context
 746  * Output:              None
 747  * Return value:        None
 748  */
 749 static TW_VOID
 750 tw_osli_free_resources(struct twa_softc *sc)
 751 {
 752         struct tw_osli_req_context      *req;
 753         TW_INT32                        error = 0;
 754
 755         tw_osli_dbg_dprintf(3, sc, "entered");
 756
 757         /* Detach from CAM */
 758         tw_osli_cam_detach(sc);
 759
 760         if (sc->req_ctx_buf)
 761                 while ((req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q)) !=
 762                         NULL) {
 763                         mtx_destroy(req->ioctl_wake_timeout_lock);
 764
 765                         if ((error = bus_dmamap_destroy(sc->dma_tag,
 766                                         req->dma_map)))
 767                                 tw_osli_dbg_dprintf(1, sc,
 768                                         "dmamap_destroy(dma) returned %d",
 769                                         error);
 770                 }
 771
 772         if ((sc->ioctl_tag) && (sc->ioctl_map))
 773                 if ((error = bus_dmamap_destroy(sc->ioctl_tag, sc->ioctl_map)))
 774                         tw_osli_dbg_dprintf(1, sc,
 775                                 "dmamap_destroy(ioctl) returned %d", error);
 776
 777         /* Free all memory allocated so far. */
 778         if (sc->req_ctx_buf)
 779                 free(sc->req_ctx_buf, TW_OSLI_MALLOC_CLASS);
 780
 781         if (sc->non_dma_mem)
 782                 free(sc->non_dma_mem, TW_OSLI_MALLOC_CLASS);
 783
 784         if (sc->dma_mem) {
 785                 bus_dmamap_unload(sc->cmd_tag, sc->cmd_map);
 786                 bus_dmamem_free(sc->cmd_tag, sc->dma_mem,
 787                         sc->cmd_map);
 788         }
 789         if (sc->cmd_tag)
 790                 if ((error = bus_dma_tag_destroy(sc->cmd_tag)))
 791                         tw_osli_dbg_dprintf(1, sc,
 792                                 "dma_tag_destroy(cmd) returned %d", error);
 793
 794         if (sc->dma_tag)
 795                 if ((error = bus_dma_tag_destroy(sc->dma_tag)))
 796                         tw_osli_dbg_dprintf(1, sc,
 797                                 "dma_tag_destroy(dma) returned %d", error);
 798
 799         if (sc->ioctl_tag)
 800                 if ((error = bus_dma_tag_destroy(sc->ioctl_tag)))
 801                         tw_osli_dbg_dprintf(1, sc,
 802                                 "dma_tag_destroy(ioctl) returned %d", error);
 803
 804         if (sc->parent_tag)
 805                 if ((error = bus_dma_tag_destroy(sc->parent_tag)))
 806                         tw_osli_dbg_dprintf(1, sc,
 807                                 "dma_tag_destroy(parent) returned %d", error);
 808
 809
 810         /* Disconnect the interrupt handler. */
 811         if ((error = twa_teardown_intr(sc)))
 812                         tw_osli_dbg_dprintf(1, sc,
 813                                 "teardown_intr returned %d", error);
 814
 815         if (sc->irq_res != NULL)
 816                 if ((error = bus_release_resource(sc->bus_dev,
 817                                 SYS_RES_IRQ, sc->irq_res_id, sc->irq_res)))
 818                         tw_osli_dbg_dprintf(1, sc,
 819                                 "release_resource(irq) returned %d", error);
 820
 821
 822         /* Release the register window mapping. */
 823         if (sc->reg_res != NULL)
 824                 if ((error = bus_release_resource(sc->bus_dev,
 825                                 SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res)))
 826                         tw_osli_dbg_dprintf(1, sc,
 827                                 "release_resource(io) returned %d", error);
 828
 829
 830         /* Destroy the control device. */
 831         if (sc->ctrl_dev != (struct cdev *)NULL)
 832                 destroy_dev(sc->ctrl_dev);
 833
 834         if ((error = sysctl_ctx_free(&sc->sysctl_ctxt)))
 835                 tw_osli_dbg_dprintf(1, sc,
 836                         "sysctl_ctx_free returned %d", error);
 837
 838 }
 839
 840
 841
 842 /*
 843  * Function name:       twa_detach
 844  * Description:         Called when the controller is being detached from
 845  *                      the pci bus.
 846  *
 847  * Input:               dev     -- bus device corresponding to the ctlr
 848  * Output:              None
 849  * Return value:        0       -- success
 850  *                      non-zero-- failure
 851  */
 852 static TW_INT32
 853 twa_detach(device_t dev)
 854 {
 855         struct twa_softc        *sc = device_get_softc(dev);
 856         TW_INT32                error;
 857
 858         tw_osli_dbg_dprintf(3, sc, "entered");
 859
 860         error = EBUSY;
 861         if (sc->open) {
 862                 tw_osli_printf(sc, "error = %d",
 863                         TW_CL_SEVERITY_ERROR_STRING,
 864                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 865                         0x2014,
 866                         "Device open",
 867                         error);
 868                 goto out;
 869         }
 870
 871         /* Shut the controller down. */
 872         if ((error = twa_shutdown(dev)))
 873                 goto out;
 874
 875         /* Free all resources associated with this controller. */
 876         tw_osli_free_resources(sc);
 877         error = 0;
 878
 879 out:
 880         return(error);
 881 }
 882
 883
 884
 885 /*
 886  * Function name:       twa_shutdown
 887  * Description:         Called at unload/shutdown time.  Lets the controller
 888  *                      know that we are going down.
 889  *
 890  * Input:               dev     -- bus device corresponding to the ctlr
 891  * Output:              None
 892  * Return value:        0       -- success
 893  *                      non-zero-- failure
 894  */
 895 static TW_INT32
 896 twa_shutdown(device_t dev)
 897 {
 898         struct twa_softc        *sc = device_get_softc(dev);
 899         TW_INT32                error = 0;
 900
 901         tw_osli_dbg_dprintf(3, sc, "entered");
 902
 903         /* Disconnect interrupts. */
 904         error = twa_teardown_intr(sc);
 905
 906         /* Stop watchdog task. */
 907         callout_drain(&(sc->watchdog_callout[0]));
 908         callout_drain(&(sc->watchdog_callout[1]));
 909
 910         /* Disconnect from the controller. */
 911         if ((error = tw_cl_shutdown_ctlr(&(sc->ctlr_handle), 0))) {
 912                 tw_osli_printf(sc, "error = %d",
 913                         TW_CL_SEVERITY_ERROR_STRING,
 914                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 915                         0x2015,
 916                         "Failed to shutdown Common Layer/controller",
 917                         error);
 918         }
 919         return(error);
 920 }
 921
 922
 923
 924 /*
 925  * Function name:       twa_busdma_lock
 926  * Description:         Function to provide synchronization during busdma_swi.
 927  *
 928  * Input:               lock_arg -- lock mutex sent as argument
 929  *                      op -- operation (lock/unlock) expected of the function
 930  * Output:              None
 931  * Return value:        None
 932  */
 933 TW_VOID
 934 twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op)
 935 {
 936         struct mtx      *lock;
 937
 938         lock = (struct mtx *)lock_arg;
 939         switch (op) {
 940         case BUS_DMA_LOCK:
 941                 mtx_lock_spin(lock);
 942                 break;
 943
 944         case BUS_DMA_UNLOCK:
 945                 mtx_unlock_spin(lock);
 946                 break;
 947
 948         default:
 949                 panic("Unknown operation 0x%x for twa_busdma_lock!", op);
 950         }
 951 }
 952
 953
 954 /*
 955  * Function name:       twa_pci_intr
 956  * Description:         Interrupt handler.  Wrapper for twa_interrupt.
 957  *
 958  * Input:               arg     -- ptr to OSL internal ctlr context
 959  * Output:              None
 960  * Return value:        None
 961  */
 962 static TW_VOID
 963 twa_pci_intr(TW_VOID *arg)
 964 {
 965         struct twa_softc        *sc = (struct twa_softc *)arg;
 966
 967         tw_osli_dbg_dprintf(10, sc, "entered");
 968         tw_cl_interrupt(&(sc->ctlr_handle));
 969 }
 970
 971
 972 /*
 973  * Function name:       tw_osli_fw_passthru
 974  * Description:         Builds a fw passthru cmd pkt, and submits it to CL.
 975  *
 976  * Input:               sc      -- ptr to OSL internal ctlr context
 977  *                      buf     -- ptr to ioctl pkt understood by CL
 978  * Output:              None
 979  * Return value:        0       -- success
 980  *                      non-zero-- failure
 981  */
 982 TW_INT32
 983 tw_osli_fw_passthru(struct twa_softc *sc, TW_INT8 *buf)
 984 {
 985         struct tw_osli_req_context              *req;
 986         struct tw_osli_ioctl_no_data_buf        *user_buf =
 987                 (struct tw_osli_ioctl_no_data_buf *)buf;
 988         TW_TIME                                 end_time;
 989         TW_UINT32                               timeout = 60;
 990         TW_UINT32                               data_buf_size_adjusted;
 991         struct tw_cl_req_packet                 *req_pkt;
 992         struct tw_cl_passthru_req_packet        *pt_req;
 993         TW_INT32                                error;
 994
 995         tw_osli_dbg_dprintf(5, sc, "ioctl: passthru");
 996
 997         if ((req = tw_osli_get_request(sc)) == NULL)
 998                 return(EBUSY);
 999
1000         req->req_handle.osl_req_ctxt = req;
1001         req->orig_req = buf;
1002         req->flags |= TW_OSLI_REQ_FLAGS_PASSTHRU;
1003
1004         req_pkt = &(req->req_pkt);
1005         req_pkt->status = 0;
1006         req_pkt->tw_osl_callback = tw_osl_complete_passthru;
1007         /* Let the Common Layer retry the request on cmd queue full. */
1008         req_pkt->flags |= TW_CL_REQ_RETRY_ON_BUSY;
1009
1010         pt_req = &(req_pkt->gen_req_pkt.pt_req);
1011         /*
1012          * Make sure that the data buffer sent to firmware is a
1013          * 512 byte multiple in size.
1014          */
1015         data_buf_size_adjusted =
1016                 (user_buf->driver_pkt.buffer_length +
1017                 (sc->sg_size_factor - 1)) & ~(sc->sg_size_factor - 1);
1018         if ((req->length = data_buf_size_adjusted)) {
1019                 if ((req->data = malloc(data_buf_size_adjusted,
1020                         TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
1021                         error = ENOMEM;
1022                         tw_osli_printf(sc, "error = %d",
1023                                 TW_CL_SEVERITY_ERROR_STRING,
1024                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1025                                 0x2016,
1026                                 "Could not alloc mem for "
1027                                 "fw_passthru data_buf",
1028                                 error);
1029                         goto fw_passthru_err;
1030                 }
1031                 /* Copy the payload. */
1032                 if ((error = copyin((TW_VOID *)(user_buf->pdata),
1033                         req->data,
1034                         user_buf->driver_pkt.buffer_length)) != 0) {
1035                         tw_osli_printf(sc, "error = %d",
1036                                 TW_CL_SEVERITY_ERROR_STRING,
1037                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1038                                 0x2017,
1039                                 "Could not copyin fw_passthru data_buf",
1040                                 error);
1041                         goto fw_passthru_err;
1042                 }
1043                 pt_req->sgl_entries = 1; /* will be updated during mapping */
1044                 req->flags |= (TW_OSLI_REQ_FLAGS_DATA_IN |
1045                         TW_OSLI_REQ_FLAGS_DATA_OUT);
1046         } else
1047                 pt_req->sgl_entries = 0; /* no payload */
1048
1049         pt_req->cmd_pkt = (TW_VOID *)(&(user_buf->cmd_pkt));
1050         pt_req->cmd_pkt_length = sizeof(struct tw_cl_command_packet);
1051
1052         if ((error = tw_osli_map_request(req)))
1053                 goto fw_passthru_err;
1054
1055         end_time = tw_osl_get_local_time() + timeout;
1056         while (req->state != TW_OSLI_REQ_STATE_COMPLETE) {
1057                 mtx_lock(req->ioctl_wake_timeout_lock);
1058                 req->flags |= TW_OSLI_REQ_FLAGS_SLEEPING;
1059
1060                 error = mtx_sleep(req, req->ioctl_wake_timeout_lock, 0,
1061                             "twa_passthru", timeout*hz);
1062                 mtx_unlock(req->ioctl_wake_timeout_lock);
1063
1064                 if (!(req->flags & TW_OSLI_REQ_FLAGS_SLEEPING))
1065                         error = 0;
1066                 req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
1067
1068                 if (! error) {
1069                         if (((error = req->error_code)) ||
1070                                 ((error = (req->state !=
1071                                 TW_OSLI_REQ_STATE_COMPLETE))) ||
1072                                 ((error = req_pkt->status)))
1073                                 goto fw_passthru_err;
1074                         break;
1075                 }
1076
1077                 if (req_pkt->status) {
1078                         error = req_pkt->status;
1079                         goto fw_passthru_err;
1080                 }
1081
1082                 if (error == EWOULDBLOCK) {
1083                         /* Time out! */
1084                         if ((!(req->error_code))                       &&
1085                             (req->state == TW_OSLI_REQ_STATE_COMPLETE) &&
1086                             (!(req_pkt->status))                          ) {
1087 #ifdef    TW_OSL_DEBUG
1088                                 tw_osli_printf(sc, "request = %p",
1089                                         TW_CL_SEVERITY_ERROR_STRING,
1090                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1091                                         0x7777,
1092                                         "FALSE Passthru timeout!",
1093                                         req);
1094 #endif /* TW_OSL_DEBUG */
1095                                 error = 0; /* False error */
1096                                 break;
1097                         }
1098                         if (!(tw_cl_is_reset_needed(&(req->ctlr->ctlr_handle)))) {
1099 #ifdef    TW_OSL_DEBUG
1100                                 tw_osli_printf(sc, "request = %p",
1101                                         TW_CL_SEVERITY_ERROR_STRING,
1102                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1103                                         0x2018,
1104                                         "Passthru request timed out!",
1105                                         req);
1106 #else  /* TW_OSL_DEBUG */
1107                         device_printf((sc)->bus_dev, "Passthru request timed out!\n");
1108 #endif /* TW_OSL_DEBUG */
1109                                 tw_cl_reset_ctlr(&(req->ctlr->ctlr_handle));
1110                         }
1111
1112                         error = 0;
1113                         end_time = tw_osl_get_local_time() + timeout;
1114                         continue;
1115                         /*
1116                          * Don't touch req after a reset.  It (and any
1117                          * associated data) will be
1118                          * unmapped by the callback.
1119                          */
1120                 }
1121                 /*
1122                  * Either the request got completed, or we were woken up by a
1123                  * signal.  Calculate the new timeout, in case it was the latter.
1124                  */
1125                 timeout = (end_time - tw_osl_get_local_time());
1126         } /* End of while loop */
1127
1128         /* If there was a payload, copy it back. */
1129         if ((!error) && (req->length))
1130                 if ((error = copyout(req->data, user_buf->pdata,
1131                         user_buf->driver_pkt.buffer_length)))
1132                         tw_osli_printf(sc, "error = %d",
1133                                 TW_CL_SEVERITY_ERROR_STRING,
1134                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1135                                 0x2019,
1136                                 "Could not copyout fw_passthru data_buf",
1137                                 error);
1138
1139 fw_passthru_err:
1140
1141         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1142                 error = EBUSY;
1143
1144         user_buf->driver_pkt.os_status = error;
1145         /* Free resources. */
1146         if (req->data)
1147                 free(req->data, TW_OSLI_MALLOC_CLASS);
1148         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1149         return(error);
1150 }
1151
1152
1153
1154 /*
1155  * Function name:       tw_osl_complete_passthru
1156  * Description:         Called to complete passthru requests.
1157  *
1158  * Input:               req_handle      -- ptr to request handle
1159  * Output:              None
1160  * Return value:        None
1161  */
1162 TW_VOID
1163 tw_osl_complete_passthru(struct tw_cl_req_handle *req_handle)
1164 {
1165         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
1166         struct tw_cl_req_packet         *req_pkt =
1167                 (struct tw_cl_req_packet *)(&req->req_pkt);
1168         struct twa_softc                *sc = req->ctlr;
1169
1170         tw_osli_dbg_dprintf(5, sc, "entered");
1171
1172         if (req->state != TW_OSLI_REQ_STATE_BUSY) {
1173                 tw_osli_printf(sc, "request = %p, status = %d",
1174                         TW_CL_SEVERITY_ERROR_STRING,
1175                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1176                         0x201B,
1177                         "Unposted command completed!!",
1178                         req, req->state);
1179         }
1180
1181         /*
1182          * Remove request from the busy queue.  Just mark it complete.
1183          * There's no need to move it into the complete queue as we are
1184          * going to be done with it right now.
1185          */
1186         req->state = TW_OSLI_REQ_STATE_COMPLETE;
1187         tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q);
1188
1189         tw_osli_unmap_request(req);
1190
1191         /*
1192          * Don't do a wake up if there was an error even before the request
1193          * was sent down to the Common Layer, and we hadn't gotten an
1194          * EINPROGRESS.  The request originator will then be returned an
1195          * error, and he can do the clean-up.
1196          */
1197         if ((req->error_code) && (!(req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)))
1198                 return;
1199
1200         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1201                 if (req->flags & TW_OSLI_REQ_FLAGS_SLEEPING) {
1202                         /* Wake up the sleeping command originator. */
1203                         tw_osli_dbg_dprintf(5, sc,
1204                                 "Waking up originator of request %p", req);
1205                         req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
1206                         wakeup_one(req);
1207                 } else {
1208                         /*
1209                          * If the request completed even before mtx_sleep
1210                          * was called, simply return.
1211                          */
1212                         if (req->flags & TW_OSLI_REQ_FLAGS_MAPPED)
1213                                 return;
1214
1215                         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1216                                 return;
1217
1218                         tw_osli_printf(sc, "request = %p",
1219                                 TW_CL_SEVERITY_ERROR_STRING,
1220                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1221                                 0x201C,
1222                                 "Passthru callback called, "
1223                                 "and caller not sleeping",
1224                                 req);
1225                 }
1226         } else {
1227                 tw_osli_printf(sc, "request = %p",
1228                         TW_CL_SEVERITY_ERROR_STRING,
1229                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1230                         0x201D,
1231                         "Passthru callback called for non-passthru request",
1232                         req);
1233         }
1234 }
1235
1236
1237
1238 /*
1239  * Function name:       tw_osli_get_request
1240  * Description:         Gets a request pkt from the free queue.
1241  *
1242  * Input:               sc      -- ptr to OSL internal ctlr context
1243  * Output:              None
1244  * Return value:        ptr to request pkt      -- success
1245  *                      NULL                    -- failure
1246  */
1247 struct tw_osli_req_context *
1248 tw_osli_get_request(struct twa_softc *sc)
1249 {
1250         struct tw_osli_req_context      *req;
1251
1252         tw_osli_dbg_dprintf(4, sc, "entered");
1253
1254         /* Get a free request packet. */
1255         req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q);
1256
1257         /* Initialize some fields to their defaults. */
1258         if (req) {
1259                 req->req_handle.osl_req_ctxt = NULL;
1260                 req->req_handle.cl_req_ctxt = NULL;
1261                 req->req_handle.is_io = 0;
1262                 req->data = NULL;
1263                 req->length = 0;
1264                 req->deadline = 0;
1265                 req->real_data = NULL;
1266                 req->real_length = 0;
1267                 req->state = TW_OSLI_REQ_STATE_INIT;/* req being initialized */
1268                 req->flags = 0;
1269                 req->error_code = 0;
1270                 req->orig_req = NULL;
1271
1272                 bzero(&(req->req_pkt), sizeof(struct tw_cl_req_packet));
1273
1274         }
1275         return(req);
1276 }
1277
1278
1279
1280 /*
1281  * Function name:       twa_map_load_data_callback
1282  * Description:         Callback of bus_dmamap_load for the buffer associated
1283  *                      with data.  Updates the cmd pkt (size/sgl_entries
1284  *                      fields, as applicable) to reflect the number of sg
1285  *                      elements.
1286  *
1287  * Input:               arg     -- ptr to OSL internal request context
1288  *                      segs    -- ptr to a list of segment descriptors
1289  *                      nsegments--# of segments
1290  *                      error   -- 0 if no errors encountered before callback,
1291  *                                 non-zero if errors were encountered
1292  * Output:              None
1293  * Return value:        None
1294  */
1295 static TW_VOID
1296 twa_map_load_data_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1297         TW_INT32 nsegments, TW_INT32 error)
1298 {
1299         struct tw_osli_req_context      *req =
1300                 (struct tw_osli_req_context *)arg;
1301         struct twa_softc                *sc = req->ctlr;
1302         struct tw_cl_req_packet         *req_pkt = &(req->req_pkt);
1303
1304         tw_osli_dbg_dprintf(10, sc, "entered");
1305
1306         if (error == EINVAL) {
1307                 req->error_code = error;
1308                 return;
1309         }
1310
1311         /* Mark the request as currently being processed. */
1312         req->state = TW_OSLI_REQ_STATE_BUSY;
1313         /* Move the request into the busy queue. */
1314         tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1315
1316         req->flags |= TW_OSLI_REQ_FLAGS_MAPPED;
1317
1318         if (error == EFBIG) {
1319                 req->error_code = error;
1320                 goto out;
1321         }
1322
1323         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1324                 struct tw_cl_passthru_req_packet        *pt_req;
1325
1326                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1327                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1328                                 BUS_DMASYNC_PREREAD);
1329
1330                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1331                         /*
1332                          * If we're using an alignment buffer, and we're
1333                          * writing data, copy the real data out.
1334                          */
1335                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1336                                 bcopy(req->real_data, req->data, req->real_length);
1337                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1338                                 BUS_DMASYNC_PREWRITE);
1339                 }
1340
1341                 pt_req = &(req_pkt->gen_req_pkt.pt_req);
1342                 pt_req->sg_list = (TW_UINT8 *)segs;
1343                 pt_req->sgl_entries += (nsegments - 1);
1344                 error = tw_cl_fw_passthru(&(sc->ctlr_handle), req_pkt,
1345                         &(req->req_handle));
1346         } else {
1347                 struct tw_cl_scsi_req_packet    *scsi_req;
1348
1349                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1350                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1351                                 BUS_DMASYNC_PREREAD);
1352
1353                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1354                         /*
1355                          * If we're using an alignment buffer, and we're
1356                          * writing data, copy the real data out.
1357                          */
1358                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1359                                 bcopy(req->real_data, req->data, req->real_length);
1360                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1361                                 BUS_DMASYNC_PREWRITE);
1362                 }
1363
1364                 scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
1365                 scsi_req->sg_list = (TW_UINT8 *)segs;
1366                 scsi_req->sgl_entries += (nsegments - 1);
1367                 error = tw_cl_start_io(&(sc->ctlr_handle), req_pkt,
1368                         &(req->req_handle));
1369         }
1370
1371 out:
1372         if (error) {
1373                 req->error_code = error;
1374                 req_pkt->tw_osl_callback(&(req->req_handle));
1375                 /*
1376                  * If the caller had been returned EINPROGRESS, and he has
1377                  * registered a callback for handling completion, the callback
1378                  * will never get called because we were unable to submit the
1379                  * request.  So, free up the request right here.
1380                  */
1381                 if (req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)
1382                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1383         }
1384 }
1385
1386
1387
1388 /*
1389  * Function name:       twa_map_load_callback
1390  * Description:         Callback of bus_dmamap_load for the buffer associated
1391  *                      with a cmd pkt.
1392  *
1393  * Input:               arg     -- ptr to variable to hold phys addr
1394  *                      segs    -- ptr to a list of segment descriptors
1395  *                      nsegments--# of segments
1396  *                      error   -- 0 if no errors encountered before callback,
1397  *                                 non-zero if errors were encountered
1398  * Output:              None
1399  * Return value:        None
1400  */
1401 static TW_VOID
1402 twa_map_load_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1403         TW_INT32 nsegments, TW_INT32 error)
1404 {
1405         *((bus_addr_t *)arg) = segs[0].ds_addr;
1406 }
1407
1408
1409
1410 /*
1411  * Function name:       tw_osli_map_request
1412  * Description:         Maps a cmd pkt and data associated with it, into
1413  *                      DMA'able memory.
1414  *
1415  * Input:               req     -- ptr to request pkt
1416  * Output:              None
1417  * Return value:        0       -- success
1418  *                      non-zero-- failure
1419  */
1420 TW_INT32
1421 tw_osli_map_request(struct tw_osli_req_context *req)
1422 {
1423         struct twa_softc        *sc = req->ctlr;
1424         TW_INT32                error = 0;
1425
1426         tw_osli_dbg_dprintf(10, sc, "entered");
1427
1428         /* If the command involves data, map that too. */
1429         if (req->data != NULL) {
1430                 /*
1431                  * It's sufficient for the data pointer to be 4-byte aligned
1432                  * to work with 9000.  However, if 4-byte aligned addresses
1433                  * are passed to bus_dmamap_load, we can get back sg elements
1434                  * that are not 512-byte multiples in size.  So, we will let
1435                  * only those buffers that are 512-byte aligned to pass
1436                  * through, and bounce the rest, so as to make sure that we
1437                  * always get back sg elements that are 512-byte multiples
1438                  * in size.
1439                  */
1440                 if (((vm_offset_t)req->data % sc->sg_size_factor) ||
1441                         (req->length % sc->sg_size_factor)) {
1442                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED;
1443                         /* Save original data pointer and length. */
1444                         req->real_data = req->data;
1445                         req->real_length = req->length;
1446                         req->length = (req->length +
1447                                 (sc->sg_size_factor - 1)) &
1448                                 ~(sc->sg_size_factor - 1);
1449                         req->data = malloc(req->length, TW_OSLI_MALLOC_CLASS,
1450                                         M_NOWAIT);
1451                         if (req->data == NULL) {
1452                                 tw_osli_printf(sc, "error = %d",
1453                                         TW_CL_SEVERITY_ERROR_STRING,
1454                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1455                                         0x201E,
1456                                         "Failed to allocate memory "
1457                                         "for bounce buffer",
1458                                         ENOMEM);
1459                                 /* Restore original data pointer and length. */
1460                                 req->data = req->real_data;
1461                                 req->length = req->real_length;
1462                                 return(ENOMEM);
1463                         }
1464                 }
1465
1466                 /*
1467                  * Map the data buffer into bus space and build the SG list.
1468                  */
1469                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1470                         /* Lock against multiple simultaneous ioctl calls. */
1471                         mtx_lock_spin(sc->io_lock);
1472                         error = bus_dmamap_load(sc->ioctl_tag, sc->ioctl_map,
1473                                 req->data, req->length,
1474                                 twa_map_load_data_callback, req,
1475                                 BUS_DMA_WAITOK);
1476                         mtx_unlock_spin(sc->io_lock);
1477                 } else {
1478                         /*
1479                          * There's only one CAM I/O thread running at a time.
1480                          * So, there's no need to hold the io_lock.
1481                          */
1482                         error = bus_dmamap_load(sc->dma_tag, req->dma_map,
1483                                 req->data, req->length,
1484                                 twa_map_load_data_callback, req,
1485                                 BUS_DMA_WAITOK);
1486                 }
1487
1488                 if (!error)
1489                         error = req->error_code;
1490                 else {
1491                         if (error == EINPROGRESS) {
1492                                 /*
1493                                  * Specifying sc->io_lock as the lockfuncarg
1494                                  * in ...tag_create should protect the access
1495                                  * of ...FLAGS_MAPPED from the callback.
1496                                  */
1497                                 mtx_lock_spin(sc->io_lock);
1498                                 if (!(req->flags & TW_OSLI_REQ_FLAGS_MAPPED))
1499                                         req->flags |= TW_OSLI_REQ_FLAGS_IN_PROGRESS;
1500                                 tw_osli_disallow_new_requests(sc, &(req->req_handle));
1501                                 mtx_unlock_spin(sc->io_lock);
1502                                 error = 0;
1503                         } else {
1504                                 tw_osli_printf(sc, "error = %d",
1505                                         TW_CL_SEVERITY_ERROR_STRING,
1506                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1507                                         0x9999,
1508                                         "Failed to map DMA memory "
1509                                         "for I/O request",
1510                                         error);
1511                                 req->flags |= TW_OSLI_REQ_FLAGS_FAILED;
1512                                 /* Free alignment buffer if it was used. */
1513                                 if (req->flags &
1514                                         TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1515                                         free(req->data, TW_OSLI_MALLOC_CLASS);
1516                                         /*
1517                                          * Restore original data pointer
1518                                          * and length.
1519                                          */
1520                                         req->data = req->real_data;
1521                                         req->length = req->real_length;
1522                                 }
1523                         }
1524                 }
1525
1526         } else {
1527                 /* Mark the request as currently being processed. */
1528                 req->state = TW_OSLI_REQ_STATE_BUSY;
1529                 /* Move the request into the busy queue. */
1530                 tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1531                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU)
1532                         error = tw_cl_fw_passthru(&sc->ctlr_handle,
1533                                         &(req->req_pkt), &(req->req_handle));
1534                 else
1535                         error = tw_cl_start_io(&sc->ctlr_handle,
1536                                         &(req->req_pkt), &(req->req_handle));
1537                 if (error) {
1538                         req->error_code = error;
1539                         req->req_pkt.tw_osl_callback(&(req->req_handle));
1540                 }
1541         }
1542         return(error);
1543 }
1544
1545
1546
1547 /*
1548  * Function name:       tw_osli_unmap_request
1549  * Description:         Undoes the mapping done by tw_osli_map_request.
1550  *
1551  * Input:               req     -- ptr to request pkt
1552  * Output:              None
1553  * Return value:        None
1554  */
1555 TW_VOID
1556 tw_osli_unmap_request(struct tw_osli_req_context *req)
1557 {
1558         struct twa_softc        *sc = req->ctlr;
1559
1560         tw_osli_dbg_dprintf(10, sc, "entered");
1561
1562         /* If the command involved data, unmap that too. */
1563         if (req->data != NULL) {
1564                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1565                         /* Lock against multiple simultaneous ioctl calls. */
1566                         mtx_lock_spin(sc->io_lock);
1567
1568                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1569                                 bus_dmamap_sync(sc->ioctl_tag,
1570                                         sc->ioctl_map, BUS_DMASYNC_POSTREAD);
1571
1572                                 /*
1573                                  * If we are using a bounce buffer, and we are
1574                                  * reading data, copy the real data in.
1575                                  */
1576                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1577                                         bcopy(req->data, req->real_data,
1578                                                 req->real_length);
1579                         }
1580
1581                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1582                                 bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1583                                         BUS_DMASYNC_POSTWRITE);
1584
1585                         bus_dmamap_unload(sc->ioctl_tag, sc->ioctl_map);
1586
1587                         mtx_unlock_spin(sc->io_lock);
1588                 } else {
1589                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1590                                 bus_dmamap_sync(sc->dma_tag,
1591                                         req->dma_map, BUS_DMASYNC_POSTREAD);
1592
1593                                 /*
1594                                  * If we are using a bounce buffer, and we are
1595                                  * reading data, copy the real data in.
1596                                  */
1597                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1598                                         bcopy(req->data, req->real_data,
1599                                                 req->real_length);
1600                         }
1601                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1602                                 bus_dmamap_sync(sc->dma_tag, req->dma_map,
1603                                         BUS_DMASYNC_POSTWRITE);
1604
1605                         bus_dmamap_unload(sc->dma_tag, req->dma_map);
1606                 }
1607         }
1608
1609         /* Free alignment buffer if it was used. */
1610         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1611                 free(req->data, TW_OSLI_MALLOC_CLASS);
1612                 /* Restore original data pointer and length. */
1613                 req->data = req->real_data;
1614                 req->length = req->real_length;
1615         }
1616 }
1617
1618
1619
1620 #ifdef TW_OSL_DEBUG
1621
1622 TW_VOID twa_report_stats(TW_VOID);
1623 TW_VOID twa_reset_stats(TW_VOID);
1624 TW_VOID tw_osli_print_ctlr_stats(struct twa_softc *sc);
1625 TW_VOID twa_print_req_info(struct tw_osli_req_context *req);
1626
1627
1628 /*
1629  * Function name:       twa_report_stats
1630  * Description:         For being called from ddb.  Calls functions that print
1631  *                      OSL and CL internal stats for the controller.
1632  *
1633  * Input:               None
1634  * Output:              None
1635  * Return value:        None
1636  */
1637 TW_VOID
1638 twa_report_stats(TW_VOID)
1639 {
1640         struct twa_softc        *sc;
1641         TW_INT32                i;
1642
1643         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1644                 tw_osli_print_ctlr_stats(sc);
1645                 tw_cl_print_ctlr_stats(&sc->ctlr_handle);
1646         }
1647 }
1648
1649
1650
1651 /*
1652  * Function name:       tw_osli_print_ctlr_stats
1653  * Description:         For being called from ddb.  Prints OSL controller stats
1654  *
1655  * Input:               sc      -- ptr to OSL internal controller context
1656  * Output:              None
1657  * Return value:        None
1658  */
1659 TW_VOID
1660 tw_osli_print_ctlr_stats(struct twa_softc *sc)
1661 {
1662         twa_printf(sc, "osl_ctlr_ctxt = %p\n", sc);
1663         twa_printf(sc, "OSLq type  current  max\n");
1664         twa_printf(sc, "free      %04d     %04d\n",
1665                 sc->q_stats[TW_OSLI_FREE_Q].cur_len,
1666                 sc->q_stats[TW_OSLI_FREE_Q].max_len);
1667         twa_printf(sc, "busy      %04d     %04d\n",
1668                 sc->q_stats[TW_OSLI_BUSY_Q].cur_len,
1669                 sc->q_stats[TW_OSLI_BUSY_Q].max_len);
1670 }
1671
1672
1673
1674 /*
1675  * Function name:       twa_print_req_info
1676  * Description:         For being called from ddb.  Calls functions that print
1677  *                      OSL and CL internal details for the request.
1678  *
1679  * Input:               req     -- ptr to OSL internal request context
1680  * Output:              None
1681  * Return value:        None
1682  */
1683 TW_VOID
1684 twa_print_req_info(struct tw_osli_req_context *req)
1685 {
1686         struct twa_softc        *sc = req->ctlr;
1687
1688         twa_printf(sc, "OSL details for request:\n");
1689         twa_printf(sc, "osl_req_ctxt = %p, cl_req_ctxt = %p\n"
1690                 "data = %p, length = 0x%x, real_data = %p, real_length = 0x%x\n"
1691                 "state = 0x%x, flags = 0x%x, error = 0x%x, orig_req = %p\n"
1692                 "next_req = %p, prev_req = %p, dma_map = %p\n",
1693                 req->req_handle.osl_req_ctxt, req->req_handle.cl_req_ctxt,
1694                 req->data, req->length, req->real_data, req->real_length,
1695                 req->state, req->flags, req->error_code, req->orig_req,
1696                 req->link.next, req->link.prev, req->dma_map);
1697         tw_cl_print_req_info(&(req->req_handle));
1698 }
1699
1700
1701
1702 /*
1703  * Function name:       twa_reset_stats
1704  * Description:         For being called from ddb.
1705  *                      Resets some OSL controller stats.
1706  *
1707  * Input:               None
1708  * Output:              None
1709  * Return value:        None
1710  */
1711 TW_VOID
1712 twa_reset_stats(TW_VOID)
1713 {
1714         struct twa_softc        *sc;
1715         TW_INT32                i;
1716
1717         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1718                 sc->q_stats[TW_OSLI_FREE_Q].max_len = 0;
1719                 sc->q_stats[TW_OSLI_BUSY_Q].max_len = 0;
1720                 tw_cl_reset_stats(&sc->ctlr_handle);
1721         }
1722 }
1723
1724 #endif /* TW_OSL_DEBUG */