sys/dev/raid/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: src/sys/dev/twa/tw_osl_freebsd.c,v 1.18 2010/09/04 16:27:14 bz Exp $
  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/raid/twa/tw_osl_includes.h>
  48 #include <dev/raid/twa/tw_cl_fwif.h>
  49 #include <dev/raid/twa/tw_cl_ioctl.h>
  50 #include <dev/raid/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 dev_ops twa_ops = {
  65         { "twa", 0, 0 },
  66         .d_open =       twa_open,
  67         .d_close =      twa_close,
  68         .d_ioctl =      twa_ioctl,
  69 };
  70
  71 static devclass_t       twa_devclass;
  72
  73
  74 /*
  75  * Function name:       twa_open
  76  * Description:         Called when the controller is opened.
  77  *                      Simply marks the controller as open.
  78  *
  79  * Input:               dev     -- control device corresponding to the ctlr
  80  *                      flags   -- mode of open
  81  *                      fmt     -- device type (character/block etc.)
  82  *                      proc    -- current process
  83  * Output:              None
  84  * Return value:        0       -- success
  85  *                      non-zero-- failure
  86  */
  87 static TW_INT32
  88 twa_open(struct dev_open_args *ap)
  89 {
  90         cdev_t                  dev = ap->a_head.a_dev;
  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 dev_close_args *ap)
 115 {
 116         cdev_t                  dev = ap->a_head.a_dev;
 117         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 118
 119         tw_osli_dbg_dprintf(5, sc, "entered");
 120         sc->open = TW_CL_FALSE;
 121         return(0);
 122 }
 123
 124
 125
 126 /*
 127  * Function name:       twa_ioctl
 128  * Description:         Called when an ioctl is posted to the controller.
 129  *                      Handles any OS Layer specific cmds, passes the rest
 130  *                      on to the Common Layer.
 131  *
 132  * Input:               dev     -- control device corresponding to the ctlr
 133  *                      cmd     -- ioctl cmd
 134  *                      buf     -- ptr to buffer in kernel memory, which is
 135  *                                 a copy of the input buffer in user-space
 136  *                      flags   -- mode of corresponding open
 137  *                      proc    -- current process
 138  * Output:              buf     -- ptr to buffer in kernel memory, which will
 139  *                                 be copied to the output buffer in user-space
 140  * Return value:        0       -- success
 141  *                      non-zero-- failure
 142  */
 143 static TW_INT32
 144 twa_ioctl(struct dev_ioctl_args *ap)
 145 {
 146         cdev_t                  dev = ap->a_head.a_dev;
 147         u_long                  cmd = ap->a_cmd;
 148         caddr_t                 buf = ap->a_data;
 149         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 150         TW_INT32                error;
 151
 152         tw_osli_dbg_dprintf(5, sc, "entered");
 153
 154         switch (cmd) {
 155         case TW_OSL_IOCTL_FIRMWARE_PASS_THROUGH:
 156                 tw_osli_dbg_dprintf(6, sc, "ioctl: fw_passthru");
 157                 error = tw_osli_fw_passthru(sc, (TW_INT8 *)buf);
 158                 break;
 159
 160         case TW_OSL_IOCTL_SCAN_BUS:
 161                 /* Request CAM for a bus scan. */
 162                 tw_osli_dbg_dprintf(6, sc, "ioctl: scan bus");
 163                 error = tw_osli_request_bus_scan(sc);
 164                 break;
 165
 166         default:
 167                 tw_osli_dbg_dprintf(6, sc, "ioctl: 0x%lx", cmd);
 168                 error = tw_cl_ioctl(&sc->ctlr_handle, cmd, buf);
 169                 break;
 170         }
 171         return(error);
 172 }
 173
 174
 175
 176 static TW_INT32 twa_probe(device_t dev);
 177 static TW_INT32 twa_attach(device_t dev);
 178 static TW_INT32 twa_detach(device_t dev);
 179 static TW_INT32 twa_shutdown(device_t dev);
 180 #if 0 /* XXX swildner */
 181 static TW_VOID  twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op);
 182 #endif
 183 static TW_VOID  twa_pci_intr(TW_VOID *arg);
 184 static TW_VOID  twa_watchdog(TW_VOID *arg);
 185 int twa_setup_intr(struct twa_softc *sc);
 186 int twa_teardown_intr(struct twa_softc *sc);
 187
 188 static TW_INT32 tw_osli_alloc_mem(struct twa_softc *sc);
 189 static TW_VOID  tw_osli_free_resources(struct twa_softc *sc);
 190
 191 static TW_VOID  twa_map_load_data_callback(TW_VOID *arg,
 192         bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
 193 static TW_VOID  twa_map_load_callback(TW_VOID *arg,
 194         bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
 195
 196
 197 static device_method_t  twa_methods[] = {
 198         /* Device interface */
 199         DEVMETHOD(device_probe,         twa_probe),
 200         DEVMETHOD(device_attach,        twa_attach),
 201         DEVMETHOD(device_detach,        twa_detach),
 202         DEVMETHOD(device_shutdown,      twa_shutdown),
 203
 204         DEVMETHOD(bus_print_child,      bus_generic_print_child),
 205         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
 206         {0, 0}
 207 };
 208
 209 static driver_t twa_pci_driver = {
 210         "twa",
 211         twa_methods,
 212         sizeof(struct twa_softc)
 213 };
 214
 215 DRIVER_MODULE(twa, pci, twa_pci_driver, twa_devclass, NULL, NULL);
 216 MODULE_DEPEND(twa, cam, 1, 1, 1);
 217 MODULE_DEPEND(twa, pci, 1, 1, 1);
 218
 219
 220 /*
 221  * Function name:       twa_probe
 222  * Description:         Called at driver load time.  Claims 9000 ctlrs.
 223  *
 224  * Input:               dev     -- bus device corresponding to the ctlr
 225  * Output:              None
 226  * Return value:        <= 0    -- success
 227  *                      > 0     -- failure
 228  */
 229 static TW_INT32
 230 twa_probe(device_t dev)
 231 {
 232         static TW_UINT8 first_ctlr = 1;
 233
 234         tw_osli_dbg_printf(3, "entered");
 235
 236         if (tw_cl_ctlr_supported(pci_get_vendor(dev), pci_get_device(dev))) {
 237                 device_set_desc(dev, TW_OSLI_DEVICE_NAME);
 238                 /* Print the driver version only once. */
 239                 if (first_ctlr) {
 240                         kprintf("3ware device driver for 9000 series storage "
 241                                 "controllers, version: %s\n",
 242                                 TW_OSL_DRIVER_VERSION_STRING);
 243                         first_ctlr = 0;
 244                 }
 245                 return(0);
 246         }
 247         return(ENXIO);
 248 }
 249
 250 int twa_setup_intr(struct twa_softc *sc)
 251 {
 252         int error = 0;
 253
 254         if (!(sc->intr_handle) && (sc->irq_res)) {
 255                 error = bus_setup_intr(sc->bus_dev, sc->irq_res,
 256                                         0,
 257                                         twa_pci_intr,
 258                                         sc, &sc->intr_handle, NULL);
 259         }
 260         return( error );
 261 }
 262
 263
 264 int twa_teardown_intr(struct twa_softc *sc)
 265 {
 266         int error = 0;
 267
 268         if ((sc->intr_handle) && (sc->irq_res)) {
 269                 error = bus_teardown_intr(sc->bus_dev,
 270                                                 sc->irq_res, sc->intr_handle);
 271                 sc->intr_handle = NULL;
 272         }
 273         return( error );
 274 }
 275
 276
 277
 278 /*
 279  * Function name:       twa_attach
 280  * Description:         Allocates pci resources; updates sc; adds a node to the
 281  *                      sysctl tree to expose the driver version; makes calls
 282  *                      (to the Common Layer) to initialize ctlr, and to
 283  *                      attach to CAM.
 284  *
 285  * Input:               dev     -- bus device corresponding to the ctlr
 286  * Output:              None
 287  * Return value:        0       -- success
 288  *                      non-zero-- failure
 289  */
 290 static TW_INT32
 291 twa_attach(device_t dev)
 292 {
 293         struct twa_softc        *sc = device_get_softc(dev);
 294         TW_UINT32               command;
 295         TW_INT32                bar_num;
 296         TW_INT32                bar0_offset;
 297         TW_INT32                bar_size;
 298         TW_INT32                error;
 299
 300         tw_osli_dbg_dprintf(3, sc, "entered");
 301
 302         sc->ctlr_handle.osl_ctlr_ctxt = sc;
 303
 304         /* Initialize the softc structure. */
 305         sc->bus_dev = dev;
 306         sc->device_id = pci_get_device(dev);
 307
 308         /* Initialize the mutexes right here. */
 309         sc->io_lock = &(sc->io_lock_handle);
 310         spin_init(sc->io_lock);
 311         sc->q_lock = &(sc->q_lock_handle);
 312         spin_init(sc->q_lock);
 313         sc->sim_lock = &(sc->sim_lock_handle);
 314         lockinit(sc->sim_lock, "tw_osl_sim_lock", 0, LK_CANRECURSE);
 315
 316         sysctl_ctx_init(&sc->sysctl_ctxt);
 317         sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctxt,
 318                 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
 319                 device_get_nameunit(dev), CTLFLAG_RD, 0, "");
 320         if (sc->sysctl_tree == NULL) {
 321                 tw_osli_printf(sc, "error = %d",
 322                         TW_CL_SEVERITY_ERROR_STRING,
 323                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 324                         0x2000,
 325                         "Cannot add sysctl tree node",
 326                         ENXIO);
 327                 return(ENXIO);
 328         }
 329         SYSCTL_ADD_STRING(&sc->sysctl_ctxt, SYSCTL_CHILDREN(sc->sysctl_tree),
 330                 OID_AUTO, "driver_version", CTLFLAG_RD,
 331                 TW_OSL_DRIVER_VERSION_STRING, 0, "TWA driver version");
 332
 333         /* Make sure we are going to be able to talk to this board. */
 334         command = pci_read_config(dev, PCIR_COMMAND, 2);
 335         if ((command & PCIM_CMD_PORTEN) == 0) {
 336                 tw_osli_printf(sc, "error = %d",
 337                         TW_CL_SEVERITY_ERROR_STRING,
 338                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 339                         0x2001,
 340                         "Register window not available",
 341                         ENXIO);
 342                 tw_osli_free_resources(sc);
 343                 return(ENXIO);
 344         }
 345
 346         /* Force the busmaster enable bit on, in case the BIOS forgot. */
 347         command |= PCIM_CMD_BUSMASTEREN;
 348         pci_write_config(dev, PCIR_COMMAND, command, 2);
 349
 350         /* Allocate the PCI register window. */
 351         if ((error = tw_cl_get_pci_bar_info(sc->device_id, TW_CL_BAR_TYPE_MEM,
 352                 &bar_num, &bar0_offset, &bar_size))) {
 353                 tw_osli_printf(sc, "error = %d",
 354                         TW_CL_SEVERITY_ERROR_STRING,
 355                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 356                         0x201F,
 357                         "Can't get PCI BAR info",
 358                         error);
 359                 tw_osli_free_resources(sc);
 360                 return(error);
 361         }
 362         sc->reg_res_id = PCIR_BARS + bar0_offset;
 363         if ((sc->reg_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
 364                                 &(sc->reg_res_id), 0, ~0, 1, RF_ACTIVE))
 365                                 == NULL) {
 366                 tw_osli_printf(sc, "error = %d",
 367                         TW_CL_SEVERITY_ERROR_STRING,
 368                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 369                         0x2002,
 370                         "Can't allocate register window",
 371                         ENXIO);
 372                 tw_osli_free_resources(sc);
 373                 return(ENXIO);
 374         }
 375         sc->bus_tag = rman_get_bustag(sc->reg_res);
 376         sc->bus_handle = rman_get_bushandle(sc->reg_res);
 377
 378         /* Allocate and register our interrupt. */
 379         sc->irq_res_id = 0;
 380         if ((sc->irq_res = bus_alloc_resource(sc->bus_dev, SYS_RES_IRQ,
 381                                 &(sc->irq_res_id), 0, ~0, 1,
 382                                 RF_SHAREABLE | RF_ACTIVE)) == NULL) {
 383                 tw_osli_printf(sc, "error = %d",
 384                         TW_CL_SEVERITY_ERROR_STRING,
 385                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 386                         0x2003,
 387                         "Can't allocate interrupt",
 388                         ENXIO);
 389                 tw_osli_free_resources(sc);
 390                 return(ENXIO);
 391         }
 392         if ((error = twa_setup_intr(sc))) {
 393                 tw_osli_printf(sc, "error = %d",
 394                         TW_CL_SEVERITY_ERROR_STRING,
 395                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 396                         0x2004,
 397                         "Can't set up interrupt",
 398                         error);
 399                 tw_osli_free_resources(sc);
 400                 return(error);
 401         }
 402
 403         if ((error = tw_osli_alloc_mem(sc))) {
 404                 tw_osli_printf(sc, "error = %d",
 405                         TW_CL_SEVERITY_ERROR_STRING,
 406                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 407                         0x2005,
 408                         "Memory allocation failure",
 409                         error);
 410                 tw_osli_free_resources(sc);
 411                 return(error);
 412         }
 413
 414         /* Initialize the Common Layer for this controller. */
 415         if ((error = tw_cl_init_ctlr(&sc->ctlr_handle, sc->flags, sc->device_id,
 416                         TW_OSLI_MAX_NUM_REQUESTS, TW_OSLI_MAX_NUM_AENS,
 417                         sc->non_dma_mem, sc->dma_mem,
 418                         sc->dma_mem_phys
 419                         ))) {
 420                 tw_osli_printf(sc, "error = %d",
 421                         TW_CL_SEVERITY_ERROR_STRING,
 422                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 423                         0x2006,
 424                         "Failed to initialize Common Layer/controller",
 425                         error);
 426                 tw_osli_free_resources(sc);
 427                 return(error);
 428         }
 429
 430         /* Create the control device. */
 431         sc->ctrl_dev = make_dev(&twa_ops, device_get_unit(sc->bus_dev),
 432                         UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR,
 433                         "twa%d", device_get_unit(sc->bus_dev));
 434         sc->ctrl_dev->si_drv1 = sc;
 435
 436         if ((error = tw_osli_cam_attach(sc))) {
 437                 tw_osli_free_resources(sc);
 438                 tw_osli_printf(sc, "error = %d",
 439                         TW_CL_SEVERITY_ERROR_STRING,
 440                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 441                         0x2007,
 442                         "Failed to initialize CAM",
 443                         error);
 444                 return(error);
 445         }
 446
 447         sc->watchdog_index = 0;
 448         callout_init(&(sc->watchdog_callout[0]));
 449         callout_init(&(sc->watchdog_callout[1]));
 450         callout_reset(&(sc->watchdog_callout[0]), 5*hz, twa_watchdog, &sc->ctlr_handle);
 451
 452         return(0);
 453 }
 454
 455
 456 static TW_VOID
 457 twa_watchdog(TW_VOID *arg)
 458 {
 459         struct tw_cl_ctlr_handle *ctlr_handle =
 460                 (struct tw_cl_ctlr_handle *)arg;
 461         struct twa_softc                *sc = ctlr_handle->osl_ctlr_ctxt;
 462         int                             i;
 463         int                             i_need_a_reset = 0;
 464         int                             driver_is_active = 0;
 465         TW_UINT64                       current_time;
 466         struct tw_osli_req_context      *my_req;
 467
 468
 469 //==============================================================================
 470         current_time = (TW_UINT64) (tw_osl_get_local_time());
 471
 472         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 473                 my_req = &(sc->req_ctx_buf[i]);
 474
 475                 if ((my_req->state == TW_OSLI_REQ_STATE_BUSY) &&
 476                         (my_req->deadline) &&
 477                         (my_req->deadline < current_time)) {
 478                         tw_cl_set_reset_needed(ctlr_handle);
 479 #ifdef    TW_OSL_DEBUG
 480                         device_printf((sc)->bus_dev, "Request %d timed out! d = %llu, c = %llu\n", i, my_req->deadline, current_time);
 481 #else  /* TW_OSL_DEBUG */
 482                         device_printf((sc)->bus_dev, "Request %d timed out!\n", i);
 483 #endif /* TW_OSL_DEBUG */
 484                         break;
 485                 }
 486         }
 487 //==============================================================================
 488
 489         i_need_a_reset = tw_cl_is_reset_needed(ctlr_handle);
 490
 491         i = (int) ((sc->watchdog_index++) & 1);
 492
 493         driver_is_active = tw_cl_is_active(ctlr_handle);
 494
 495         if (i_need_a_reset) {
 496 #ifdef    TW_OSL_DEBUG
 497                 device_printf((sc)->bus_dev, "Watchdog rescheduled in 70 seconds\n");
 498 #endif /* TW_OSL_DEBUG */
 499                 callout_reset(&(sc->watchdog_callout[i]), 70*hz, twa_watchdog, &sc->ctlr_handle);
 500                 tw_cl_reset_ctlr(ctlr_handle);
 501 #ifdef    TW_OSL_DEBUG
 502                 device_printf((sc)->bus_dev, "Watchdog reset completed!\n");
 503 #endif /* TW_OSL_DEBUG */
 504         } else if (driver_is_active) {
 505                 callout_reset(&(sc->watchdog_callout[i]),  5*hz, twa_watchdog, &sc->ctlr_handle);
 506         }
 507 #ifdef    TW_OSL_DEBUG
 508         if (i_need_a_reset)
 509                 device_printf((sc)->bus_dev, "i_need_a_reset = %d, "
 510                 "driver_is_active = %d\n",
 511                 i_need_a_reset, driver_is_active);
 512 #endif /* TW_OSL_DEBUG */
 513 }
 514
 515
 516 /*
 517  * Function name:       tw_osli_alloc_mem
 518  * Description:         Allocates memory needed both by CL and OSL.
 519  *
 520  * Input:               sc      -- OSL internal controller context
 521  * Output:              None
 522  * Return value:        0       -- success
 523  *                      non-zero-- failure
 524  */
 525 static TW_INT32
 526 tw_osli_alloc_mem(struct twa_softc *sc)
 527 {
 528         struct tw_osli_req_context      *req;
 529         TW_UINT32                       max_sg_elements;
 530         TW_UINT32                       non_dma_mem_size;
 531         TW_UINT32                       dma_mem_size;
 532         TW_INT32                        error;
 533         TW_INT32                        i;
 534
 535         tw_osli_dbg_dprintf(3, sc, "entered");
 536
 537         sc->flags |= (sizeof(bus_addr_t) == 8) ? TW_CL_64BIT_ADDRESSES : 0;
 538         sc->flags |= (sizeof(bus_size_t) == 8) ? TW_CL_64BIT_SG_LENGTH : 0;
 539
 540         max_sg_elements = (sizeof(bus_addr_t) == 8) ?
 541                 TW_CL_MAX_64BIT_SG_ELEMENTS : TW_CL_MAX_32BIT_SG_ELEMENTS;
 542
 543         if ((error = tw_cl_get_mem_requirements(&sc->ctlr_handle, sc->flags,
 544                         sc->device_id, TW_OSLI_MAX_NUM_REQUESTS,  TW_OSLI_MAX_NUM_AENS,
 545                         &(sc->alignment), &(sc->sg_size_factor),
 546                         &non_dma_mem_size, &dma_mem_size
 547                         ))) {
 548                 tw_osli_printf(sc, "error = %d",
 549                         TW_CL_SEVERITY_ERROR_STRING,
 550                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 551                         0x2008,
 552                         "Can't get Common Layer's memory requirements",
 553                         error);
 554                 return(error);
 555         }
 556
 557         if ((sc->non_dma_mem = kmalloc(non_dma_mem_size, TW_OSLI_MALLOC_CLASS,
 558                                 M_WAITOK)) == NULL) {
 559                 tw_osli_printf(sc, "error = %d",
 560                         TW_CL_SEVERITY_ERROR_STRING,
 561                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 562                         0x2009,
 563                         "Can't allocate non-dma memory",
 564                         ENOMEM);
 565                 return(ENOMEM);
 566         }
 567
 568         /* Create the parent dma tag. */
 569         if (bus_dma_tag_create(NULL,                    /* parent */
 570                                 sc->alignment,          /* alignment */
 571                                 TW_OSLI_DMA_BOUNDARY,   /* boundary */
 572                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 573                                 BUS_SPACE_MAXADDR,      /* highaddr */
 574                                 NULL, NULL,             /* filter, filterarg */
 575                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 576                                 max_sg_elements,        /* nsegments */
 577                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 578                                 0,                      /* flags */
 579                                 &sc->parent_tag         /* tag */)) {
 580                 tw_osli_printf(sc, "error = %d",
 581                         TW_CL_SEVERITY_ERROR_STRING,
 582                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 583                         0x200A,
 584                         "Can't allocate parent DMA tag",
 585                         ENOMEM);
 586                 return(ENOMEM);
 587         }
 588
 589         /* Create a dma tag for Common Layer's DMA'able memory (dma_mem). */
 590         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 591                                 sc->alignment,          /* alignment */
 592                                 0,                      /* boundary */
 593                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 594                                 BUS_SPACE_MAXADDR,      /* highaddr */
 595                                 NULL, NULL,             /* filter, filterarg */
 596                                 dma_mem_size,           /* maxsize */
 597                                 1,                      /* nsegments */
 598                                 BUS_SPACE_MAXSIZE,      /* maxsegsize */
 599                                 0,                      /* flags */
 600                                 &sc->cmd_tag            /* tag */)) {
 601                 tw_osli_printf(sc, "error = %d",
 602                         TW_CL_SEVERITY_ERROR_STRING,
 603                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 604                         0x200B,
 605                         "Can't allocate DMA tag for Common Layer's "
 606                         "DMA'able memory",
 607                         ENOMEM);
 608                 return(ENOMEM);
 609         }
 610
 611         if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 612                 BUS_DMA_NOWAIT, &sc->cmd_map)) {
 613                 /* Try a second time. */
 614                 if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 615                         BUS_DMA_NOWAIT, &sc->cmd_map)) {
 616                         tw_osli_printf(sc, "error = %d",
 617                                 TW_CL_SEVERITY_ERROR_STRING,
 618                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 619                                 0x200C,
 620                                 "Can't allocate DMA'able memory for the"
 621                                 "Common Layer",
 622                                 ENOMEM);
 623                         return(ENOMEM);
 624                 }
 625         }
 626
 627         bus_dmamap_load(sc->cmd_tag, sc->cmd_map, sc->dma_mem,
 628                 dma_mem_size, twa_map_load_callback,
 629                 &sc->dma_mem_phys, 0);
 630
 631         /*
 632          * Create a dma tag for data buffers; size will be the maximum
 633          * possible I/O size (128kB).
 634          */
 635         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 636                                 sc->alignment,          /* alignment */
 637                                 0,                      /* boundary */
 638                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 639                                 BUS_SPACE_MAXADDR,      /* highaddr */
 640                                 NULL, NULL,             /* filter, filterarg */
 641                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 642                                 max_sg_elements,        /* nsegments */
 643                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 644                                 BUS_DMA_ALLOCNOW,       /* flags */
 645 #if 0 /* XXX swildner */
 646                                 twa_busdma_lock,        /* lockfunc */
 647                                 sc->io_lock,            /* lockfuncarg */
 648 #endif
 649                                 &sc->dma_tag            /* tag */)) {
 650                 tw_osli_printf(sc, "error = %d",
 651                         TW_CL_SEVERITY_ERROR_STRING,
 652                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 653                         0x200F,
 654                         "Can't allocate DMA tag for data buffers",
 655                         ENOMEM);
 656                 return(ENOMEM);
 657         }
 658
 659         /*
 660          * Create a dma tag for ioctl data buffers; size will be the maximum
 661          * possible I/O size (128kB).
 662          */
 663         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 664                                 sc->alignment,          /* alignment */
 665                                 0,                      /* boundary */
 666                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 667                                 BUS_SPACE_MAXADDR,      /* highaddr */
 668                                 NULL, NULL,             /* filter, filterarg */
 669                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 670                                 max_sg_elements,        /* nsegments */
 671                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 672                                 BUS_DMA_ALLOCNOW,       /* flags */
 673 #if 0 /* XXX swildner */
 674                                 twa_busdma_lock,        /* lockfunc */
 675                                 sc->io_lock,            /* lockfuncarg */
 676 #endif
 677                                 &sc->ioctl_tag          /* tag */)) {
 678                 tw_osli_printf(sc, "error = %d",
 679                         TW_CL_SEVERITY_ERROR_STRING,
 680                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 681                         0x2010,
 682                         "Can't allocate DMA tag for ioctl data buffers",
 683                         ENOMEM);
 684                 return(ENOMEM);
 685         }
 686
 687         /* Create just one map for all ioctl request data buffers. */
 688         if (bus_dmamap_create(sc->ioctl_tag, 0, &sc->ioctl_map)) {
 689                 tw_osli_printf(sc, "error = %d",
 690                         TW_CL_SEVERITY_ERROR_STRING,
 691                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 692                         0x2011,
 693                         "Can't create ioctl map",
 694                         ENOMEM);
 695                 return(ENOMEM);
 696         }
 697
 698
 699         /* Initialize request queues. */
 700         tw_osli_req_q_init(sc, TW_OSLI_FREE_Q);
 701         tw_osli_req_q_init(sc, TW_OSLI_BUSY_Q);
 702
 703         if ((sc->req_ctx_buf = (struct tw_osli_req_context *)
 704                         kmalloc((sizeof(struct tw_osli_req_context) *
 705                                 TW_OSLI_MAX_NUM_REQUESTS),
 706                                 TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
 707                 tw_osli_printf(sc, "error = %d",
 708                         TW_CL_SEVERITY_ERROR_STRING,
 709                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 710                         0x2012,
 711                         "Failed to allocate request packets",
 712                         ENOMEM);
 713                 return(ENOMEM);
 714         }
 715         bzero(sc->req_ctx_buf,
 716                 sizeof(struct tw_osli_req_context) * TW_OSLI_MAX_NUM_REQUESTS);
 717
 718         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 719                 req = &(sc->req_ctx_buf[i]);
 720                 req->ctlr = sc;
 721                 if (bus_dmamap_create(sc->dma_tag, 0, &req->dma_map)) {
 722                         tw_osli_printf(sc, "request # = %d, error = %d",
 723                                 TW_CL_SEVERITY_ERROR_STRING,
 724                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 725                                 0x2013,
 726                                 "Can't create dma map",
 727                                 i, ENOMEM);
 728                         return(ENOMEM);
 729                 }
 730
 731                 /* Initialize the ioctl wakeup/ timeout mutex */
 732                 req->ioctl_wake_timeout_lock = &(req->ioctl_wake_timeout_lock_handle);
 733                 lockinit(req->ioctl_wake_timeout_lock, "tw_ioctl_wake_timeout_lock", 0, 0);
 734
 735                 /* Insert request into the free queue. */
 736                 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 737         }
 738
 739         return(0);
 740 }
 741
 742
 743
 744 /*
 745  * Function name:       tw_osli_free_resources
 746  * Description:         Performs clean-up at the time of going down.
 747  *
 748  * Input:               sc      -- ptr to OSL internal ctlr context
 749  * Output:              None
 750  * Return value:        None
 751  */
 752 static TW_VOID
 753 tw_osli_free_resources(struct twa_softc *sc)
 754 {
 755         struct tw_osli_req_context      *req;
 756         TW_INT32                        error = 0;
 757
 758         tw_osli_dbg_dprintf(3, sc, "entered");
 759
 760         /* Detach from CAM */
 761         tw_osli_cam_detach(sc);
 762
 763         if (sc->req_ctx_buf)
 764                 while ((req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q)) !=
 765                         NULL) {
 766                         lockuninit(req->ioctl_wake_timeout_lock);
 767
 768                         if ((error = bus_dmamap_destroy(sc->dma_tag,
 769                                         req->dma_map)))
 770                                 tw_osli_dbg_dprintf(1, sc,
 771                                         "dmamap_destroy(dma) returned %d",
 772                                         error);
 773                 }
 774
 775         if ((sc->ioctl_tag) && (sc->ioctl_map))
 776                 if ((error = bus_dmamap_destroy(sc->ioctl_tag, sc->ioctl_map)))
 777                         tw_osli_dbg_dprintf(1, sc,
 778                                 "dmamap_destroy(ioctl) returned %d", error);
 779
 780         /* Free all memory allocated so far. */
 781         if (sc->req_ctx_buf)
 782                 kfree(sc->req_ctx_buf, TW_OSLI_MALLOC_CLASS);
 783
 784         if (sc->non_dma_mem)
 785                 kfree(sc->non_dma_mem, TW_OSLI_MALLOC_CLASS);
 786
 787         if (sc->dma_mem) {
 788                 bus_dmamap_unload(sc->cmd_tag, sc->cmd_map);
 789                 bus_dmamem_free(sc->cmd_tag, sc->dma_mem,
 790                         sc->cmd_map);
 791         }
 792         if (sc->cmd_tag)
 793                 if ((error = bus_dma_tag_destroy(sc->cmd_tag)))
 794                         tw_osli_dbg_dprintf(1, sc,
 795                                 "dma_tag_destroy(cmd) returned %d", error);
 796
 797         if (sc->dma_tag)
 798                 if ((error = bus_dma_tag_destroy(sc->dma_tag)))
 799                         tw_osli_dbg_dprintf(1, sc,
 800                                 "dma_tag_destroy(dma) returned %d", error);
 801
 802         if (sc->ioctl_tag)
 803                 if ((error = bus_dma_tag_destroy(sc->ioctl_tag)))
 804                         tw_osli_dbg_dprintf(1, sc,
 805                                 "dma_tag_destroy(ioctl) returned %d", error);
 806
 807         if (sc->parent_tag)
 808                 if ((error = bus_dma_tag_destroy(sc->parent_tag)))
 809                         tw_osli_dbg_dprintf(1, sc,
 810                                 "dma_tag_destroy(parent) returned %d", error);
 811
 812
 813         /* Disconnect the interrupt handler. */
 814         if ((error = twa_teardown_intr(sc)))
 815                         tw_osli_dbg_dprintf(1, sc,
 816                                 "teardown_intr returned %d", error);
 817
 818         if (sc->irq_res != NULL)
 819                 if ((error = bus_release_resource(sc->bus_dev,
 820                                 SYS_RES_IRQ, sc->irq_res_id, sc->irq_res)))
 821                         tw_osli_dbg_dprintf(1, sc,
 822                                 "release_resource(irq) returned %d", error);
 823
 824
 825         /* Release the register window mapping. */
 826         if (sc->reg_res != NULL)
 827                 if ((error = bus_release_resource(sc->bus_dev,
 828                                 SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res)))
 829                         tw_osli_dbg_dprintf(1, sc,
 830                                 "release_resource(io) returned %d", error);
 831
 832         dev_ops_remove_minor(&twa_ops, device_get_unit(sc->bus_dev));
 833
 834         /* Destroy the control device. */
 835         if (sc->ctrl_dev != (struct cdev *)NULL)
 836                 destroy_dev(sc->ctrl_dev);
 837
 838         if ((error = sysctl_ctx_free(&sc->sysctl_ctxt)))
 839                 tw_osli_dbg_dprintf(1, sc,
 840                         "sysctl_ctx_free returned %d", error);
 841
 842 }
 843
 844
 845
 846 /*
 847  * Function name:       twa_detach
 848  * Description:         Called when the controller is being detached from
 849  *                      the pci bus.
 850  *
 851  * Input:               dev     -- bus device corresponding to the ctlr
 852  * Output:              None
 853  * Return value:        0       -- success
 854  *                      non-zero-- failure
 855  */
 856 static TW_INT32
 857 twa_detach(device_t dev)
 858 {
 859         struct twa_softc        *sc = device_get_softc(dev);
 860         TW_INT32                error;
 861
 862         tw_osli_dbg_dprintf(3, sc, "entered");
 863
 864         error = EBUSY;
 865         if (sc->open) {
 866                 tw_osli_printf(sc, "error = %d",
 867                         TW_CL_SEVERITY_ERROR_STRING,
 868                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 869                         0x2014,
 870                         "Device open",
 871                         error);
 872                 goto out;
 873         }
 874
 875         /* Shut the controller down. */
 876         if ((error = twa_shutdown(dev)))
 877                 goto out;
 878
 879         /* Free all resources associated with this controller. */
 880         tw_osli_free_resources(sc);
 881         error = 0;
 882
 883 out:
 884         return(error);
 885 }
 886
 887
 888
 889 /*
 890  * Function name:       twa_shutdown
 891  * Description:         Called at unload/shutdown time.  Lets the controller
 892  *                      know that we are going down.
 893  *
 894  * Input:               dev     -- bus device corresponding to the ctlr
 895  * Output:              None
 896  * Return value:        0       -- success
 897  *                      non-zero-- failure
 898  */
 899 static TW_INT32
 900 twa_shutdown(device_t dev)
 901 {
 902         struct twa_softc        *sc = device_get_softc(dev);
 903         TW_INT32                error = 0;
 904
 905         tw_osli_dbg_dprintf(3, sc, "entered");
 906
 907         /* Disconnect interrupts. */
 908         error = twa_teardown_intr(sc);
 909
 910 #if 0 /* XXX swildner */
 911         /* Stop watchdog task. */
 912         callout_drain(&(sc->watchdog_callout[0]));
 913         callout_drain(&(sc->watchdog_callout[1]));
 914 #endif
 915
 916         /* Disconnect from the controller. */
 917         if ((error = tw_cl_shutdown_ctlr(&(sc->ctlr_handle), 0))) {
 918                 tw_osli_printf(sc, "error = %d",
 919                         TW_CL_SEVERITY_ERROR_STRING,
 920                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 921                         0x2015,
 922                         "Failed to shutdown Common Layer/controller",
 923                         error);
 924         }
 925         return(error);
 926 }
 927
 928
 929
 930 #if 0 /* XXX swildner */
 931 /*
 932  * Function name:       twa_busdma_lock
 933  * Description:         Function to provide synchronization during busdma_swi.
 934  *
 935  * Input:               lock_arg -- lock mutex sent as argument
 936  *                      op -- operation (lock/unlock) expected of the function
 937  * Output:              None
 938  * Return value:        None
 939  */
 940 TW_VOID
 941 twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op)
 942 {
 943         struct spinlock *lock;
 944
 945         lock = (struct spinlock *)lock_arg;
 946         switch (op) {
 947         case BUS_DMA_LOCK:
 948                 spin_lock(lock);
 949                 break;
 950
 951         case BUS_DMA_UNLOCK:
 952                 spin_unlock(lock);
 953                 break;
 954
 955         default:
 956                 panic("Unknown operation 0x%x for twa_busdma_lock!", op);
 957         }
 958 }
 959 #endif
 960
 961
 962 /*
 963  * Function name:       twa_pci_intr
 964  * Description:         Interrupt handler.  Wrapper for twa_interrupt.
 965  *
 966  * Input:               arg     -- ptr to OSL internal ctlr context
 967  * Output:              None
 968  * Return value:        None
 969  */
 970 static TW_VOID
 971 twa_pci_intr(TW_VOID *arg)
 972 {
 973         struct twa_softc        *sc = (struct twa_softc *)arg;
 974
 975         tw_osli_dbg_dprintf(10, sc, "entered");
 976         tw_cl_interrupt(&(sc->ctlr_handle));
 977 }
 978
 979
 980 /*
 981  * Function name:       tw_osli_fw_passthru
 982  * Description:         Builds a fw passthru cmd pkt, and submits it to CL.
 983  *
 984  * Input:               sc      -- ptr to OSL internal ctlr context
 985  *                      buf     -- ptr to ioctl pkt understood by CL
 986  * Output:              None
 987  * Return value:        0       -- success
 988  *                      non-zero-- failure
 989  */
 990 TW_INT32
 991 tw_osli_fw_passthru(struct twa_softc *sc, TW_INT8 *buf)
 992 {
 993         struct tw_osli_req_context              *req;
 994         struct tw_osli_ioctl_no_data_buf        *user_buf =
 995                 (struct tw_osli_ioctl_no_data_buf *)buf;
 996         TW_TIME                                 end_time;
 997         TW_UINT32                               timeout = 60;
 998         TW_UINT32                               data_buf_size_adjusted;
 999         struct tw_cl_req_packet                 *req_pkt;
1000         struct tw_cl_passthru_req_packet        *pt_req;
1001         TW_INT32                                error;
1002
1003         tw_osli_dbg_dprintf(5, sc, "ioctl: passthru");
1004
1005         if ((req = tw_osli_get_request(sc)) == NULL)
1006                 return(EBUSY);
1007
1008         req->req_handle.osl_req_ctxt = req;
1009         req->orig_req = buf;
1010         req->flags |= TW_OSLI_REQ_FLAGS_PASSTHRU;
1011
1012         req_pkt = &(req->req_pkt);
1013         req_pkt->status = 0;
1014         req_pkt->tw_osl_callback = tw_osl_complete_passthru;
1015         /* Let the Common Layer retry the request on cmd queue full. */
1016         req_pkt->flags |= TW_CL_REQ_RETRY_ON_BUSY;
1017
1018         pt_req = &(req_pkt->gen_req_pkt.pt_req);
1019         /*
1020          * Make sure that the data buffer sent to firmware is a
1021          * 512 byte multiple in size.
1022          */
1023         data_buf_size_adjusted =
1024                 (user_buf->driver_pkt.buffer_length +
1025                 (sc->sg_size_factor - 1)) & ~(sc->sg_size_factor - 1);
1026         if ((req->length = data_buf_size_adjusted)) {
1027                 if ((req->data = kmalloc(data_buf_size_adjusted,
1028                         TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
1029                         error = ENOMEM;
1030                         tw_osli_printf(sc, "error = %d",
1031                                 TW_CL_SEVERITY_ERROR_STRING,
1032                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1033                                 0x2016,
1034                                 "Could not alloc mem for "
1035                                 "fw_passthru data_buf",
1036                                 error);
1037                         goto fw_passthru_err;
1038                 }
1039                 /* Copy the payload. */
1040                 if ((error = copyin((TW_VOID *)(user_buf->pdata),
1041                         req->data,
1042                         user_buf->driver_pkt.buffer_length)) != 0) {
1043                         tw_osli_printf(sc, "error = %d",
1044                                 TW_CL_SEVERITY_ERROR_STRING,
1045                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1046                                 0x2017,
1047                                 "Could not copyin fw_passthru data_buf",
1048                                 error);
1049                         goto fw_passthru_err;
1050                 }
1051                 pt_req->sgl_entries = 1; /* will be updated during mapping */
1052                 req->flags |= (TW_OSLI_REQ_FLAGS_DATA_IN |
1053                         TW_OSLI_REQ_FLAGS_DATA_OUT);
1054         } else
1055                 pt_req->sgl_entries = 0; /* no payload */
1056
1057         pt_req->cmd_pkt = (TW_VOID *)(&(user_buf->cmd_pkt));
1058         pt_req->cmd_pkt_length = sizeof(struct tw_cl_command_packet);
1059
1060         if ((error = tw_osli_map_request(req)))
1061                 goto fw_passthru_err;
1062
1063         end_time = tw_osl_get_local_time() + timeout;
1064         while (req->state != TW_OSLI_REQ_STATE_COMPLETE) {
1065                 lockmgr(req->ioctl_wake_timeout_lock, LK_EXCLUSIVE);
1066                 req->flags |= TW_OSLI_REQ_FLAGS_SLEEPING;
1067
1068                 error = lksleep(req, req->ioctl_wake_timeout_lock, 0,
1069                             "twa_passthru", timeout*hz);
1070                 lockmgr(req->ioctl_wake_timeout_lock, LK_RELEASE);
1071
1072                 if (!(req->flags & TW_OSLI_REQ_FLAGS_SLEEPING))
1073                         error = 0;
1074                 req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
1075
1076                 if (! error) {
1077                         if (((error = req->error_code)) ||
1078                                 ((error = (req->state !=
1079                                 TW_OSLI_REQ_STATE_COMPLETE))) ||
1080                                 ((error = req_pkt->status)))
1081                                 goto fw_passthru_err;
1082                         break;
1083                 }
1084
1085                 if (req_pkt->status) {
1086                         error = req_pkt->status;
1087                         goto fw_passthru_err;
1088                 }
1089
1090                 if (error == EWOULDBLOCK) {
1091                         /* Time out! */
1092                         if ((!(req->error_code))                       &&
1093                             (req->state == TW_OSLI_REQ_STATE_COMPLETE) &&
1094                             (!(req_pkt->status))                          ) {
1095 #ifdef    TW_OSL_DEBUG
1096                                 tw_osli_printf(sc, "request = %p",
1097                                         TW_CL_SEVERITY_ERROR_STRING,
1098                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1099                                         0x7777,
1100                                         "FALSE Passthru timeout!",
1101                                         req);
1102 #endif /* TW_OSL_DEBUG */
1103                                 error = 0; /* False error */
1104                                 break;
1105                         }
1106                         if (!(tw_cl_is_reset_needed(&(req->ctlr->ctlr_handle)))) {
1107 #ifdef    TW_OSL_DEBUG
1108                                 tw_osli_printf(sc, "request = %p",
1109                                         TW_CL_SEVERITY_ERROR_STRING,
1110                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1111                                         0x2018,
1112                                         "Passthru request timed out!",
1113                                         req);
1114 #else  /* TW_OSL_DEBUG */
1115                         device_printf((sc)->bus_dev, "Passthru request timed out!\n");
1116 #endif /* TW_OSL_DEBUG */
1117                                 tw_cl_reset_ctlr(&(req->ctlr->ctlr_handle));
1118                         }
1119
1120                         error = 0;
1121                         end_time = tw_osl_get_local_time() + timeout;
1122                         continue;
1123                         /*
1124                          * Don't touch req after a reset.  It (and any
1125                          * associated data) will be
1126                          * unmapped by the callback.
1127                          */
1128                 }
1129                 /*
1130                  * Either the request got completed, or we were woken up by a
1131                  * signal.  Calculate the new timeout, in case it was the latter.
1132                  */
1133                 timeout = (end_time - tw_osl_get_local_time());
1134         } /* End of while loop */
1135
1136         /* If there was a payload, copy it back. */
1137         if ((!error) && (req->length))
1138                 if ((error = copyout(req->data, user_buf->pdata,
1139                         user_buf->driver_pkt.buffer_length)))
1140                         tw_osli_printf(sc, "error = %d",
1141                                 TW_CL_SEVERITY_ERROR_STRING,
1142                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1143                                 0x2019,
1144                                 "Could not copyout fw_passthru data_buf",
1145                                 error);
1146
1147 fw_passthru_err:
1148
1149         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1150                 error = EBUSY;
1151
1152         user_buf->driver_pkt.os_status = error;
1153         /* Free resources. */
1154         if (req->data)
1155                 kfree(req->data, TW_OSLI_MALLOC_CLASS);
1156         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1157         return(error);
1158 }
1159
1160
1161
1162 /*
1163  * Function name:       tw_osl_complete_passthru
1164  * Description:         Called to complete passthru requests.
1165  *
1166  * Input:               req_handle      -- ptr to request handle
1167  * Output:              None
1168  * Return value:        None
1169  */
1170 TW_VOID
1171 tw_osl_complete_passthru(struct tw_cl_req_handle *req_handle)
1172 {
1173         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
1174         struct tw_cl_req_packet         *req_pkt =
1175                 (struct tw_cl_req_packet *)(&req->req_pkt);
1176         struct twa_softc                *sc = req->ctlr;
1177
1178         tw_osli_dbg_dprintf(5, sc, "entered");
1179
1180         if (req->state != TW_OSLI_REQ_STATE_BUSY) {
1181                 tw_osli_printf(sc, "request = %p, status = %d",
1182                         TW_CL_SEVERITY_ERROR_STRING,
1183                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1184                         0x201B,
1185                         "Unposted command completed!!",
1186                         req, req->state);
1187         }
1188
1189         /*
1190          * Remove request from the busy queue.  Just mark it complete.
1191          * There's no need to move it into the complete queue as we are
1192          * going to be done with it right now.
1193          */
1194         req->state = TW_OSLI_REQ_STATE_COMPLETE;
1195         tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q);
1196
1197         tw_osli_unmap_request(req);
1198
1199         /*
1200          * Don't do a wake up if there was an error even before the request
1201          * was sent down to the Common Layer, and we hadn't gotten an
1202          * EINPROGRESS.  The request originator will then be returned an
1203          * error, and he can do the clean-up.
1204          */
1205         if ((req->error_code) && (!(req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)))
1206                 return;
1207
1208         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1209                 if (req->flags & TW_OSLI_REQ_FLAGS_SLEEPING) {
1210                         /* Wake up the sleeping command originator. */
1211                         tw_osli_dbg_dprintf(5, sc,
1212                                 "Waking up originator of request %p", req);
1213                         req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
1214                         wakeup_one(req);
1215                 } else {
1216                         /*
1217                          * If the request completed even before mtx_sleep
1218                          * was called, simply return.
1219                          */
1220                         if (req->flags & TW_OSLI_REQ_FLAGS_MAPPED)
1221                                 return;
1222
1223                         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1224                                 return;
1225
1226                         tw_osli_printf(sc, "request = %p",
1227                                 TW_CL_SEVERITY_ERROR_STRING,
1228                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1229                                 0x201C,
1230                                 "Passthru callback called, "
1231                                 "and caller not sleeping",
1232                                 req);
1233                 }
1234         } else {
1235                 tw_osli_printf(sc, "request = %p",
1236                         TW_CL_SEVERITY_ERROR_STRING,
1237                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1238                         0x201D,
1239                         "Passthru callback called for non-passthru request",
1240                         req);
1241         }
1242 }
1243
1244
1245
1246 /*
1247  * Function name:       tw_osli_get_request
1248  * Description:         Gets a request pkt from the free queue.
1249  *
1250  * Input:               sc      -- ptr to OSL internal ctlr context
1251  * Output:              None
1252  * Return value:        ptr to request pkt      -- success
1253  *                      NULL                    -- failure
1254  */
1255 struct tw_osli_req_context *
1256 tw_osli_get_request(struct twa_softc *sc)
1257 {
1258         struct tw_osli_req_context      *req;
1259
1260         tw_osli_dbg_dprintf(4, sc, "entered");
1261
1262         /* Get a free request packet. */
1263         req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q);
1264
1265         /* Initialize some fields to their defaults. */
1266         if (req) {
1267                 req->req_handle.osl_req_ctxt = NULL;
1268                 req->req_handle.cl_req_ctxt = NULL;
1269                 req->req_handle.is_io = 0;
1270                 req->data = NULL;
1271                 req->length = 0;
1272                 req->deadline = 0;
1273                 req->real_data = NULL;
1274                 req->real_length = 0;
1275                 req->state = TW_OSLI_REQ_STATE_INIT;/* req being initialized */
1276                 req->flags = 0;
1277                 req->error_code = 0;
1278                 req->orig_req = NULL;
1279
1280                 bzero(&(req->req_pkt), sizeof(struct tw_cl_req_packet));
1281
1282         }
1283         return(req);
1284 }
1285
1286
1287
1288 /*
1289  * Function name:       twa_map_load_data_callback
1290  * Description:         Callback of bus_dmamap_load for the buffer associated
1291  *                      with data.  Updates the cmd pkt (size/sgl_entries
1292  *                      fields, as applicable) to reflect the number of sg
1293  *                      elements.
1294  *
1295  * Input:               arg     -- ptr to OSL internal request context
1296  *                      segs    -- ptr to a list of segment descriptors
1297  *                      nsegments--# of segments
1298  *                      error   -- 0 if no errors encountered before callback,
1299  *                                 non-zero if errors were encountered
1300  * Output:              None
1301  * Return value:        None
1302  */
1303 static TW_VOID
1304 twa_map_load_data_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1305         TW_INT32 nsegments, TW_INT32 error)
1306 {
1307         struct tw_osli_req_context      *req =
1308                 (struct tw_osli_req_context *)arg;
1309         struct twa_softc                *sc = req->ctlr;
1310         struct tw_cl_req_packet         *req_pkt = &(req->req_pkt);
1311
1312         tw_osli_dbg_dprintf(10, sc, "entered");
1313
1314         if (error == EINVAL) {
1315                 req->error_code = error;
1316                 return;
1317         }
1318
1319         /* Mark the request as currently being processed. */
1320         req->state = TW_OSLI_REQ_STATE_BUSY;
1321         /* Move the request into the busy queue. */
1322         tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1323
1324         req->flags |= TW_OSLI_REQ_FLAGS_MAPPED;
1325
1326         if (error == EFBIG) {
1327                 req->error_code = error;
1328                 goto out;
1329         }
1330
1331         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1332                 struct tw_cl_passthru_req_packet        *pt_req;
1333
1334                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1335                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1336                                 BUS_DMASYNC_PREREAD);
1337
1338                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1339                         /*
1340                          * If we're using an alignment buffer, and we're
1341                          * writing data, copy the real data out.
1342                          */
1343                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1344                                 bcopy(req->real_data, req->data, req->real_length);
1345                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1346                                 BUS_DMASYNC_PREWRITE);
1347                 }
1348
1349                 pt_req = &(req_pkt->gen_req_pkt.pt_req);
1350                 pt_req->sg_list = (TW_UINT8 *)segs;
1351                 pt_req->sgl_entries += (nsegments - 1);
1352                 error = tw_cl_fw_passthru(&(sc->ctlr_handle), req_pkt,
1353                         &(req->req_handle));
1354         } else {
1355                 struct tw_cl_scsi_req_packet    *scsi_req;
1356
1357                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1358                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1359                                 BUS_DMASYNC_PREREAD);
1360
1361                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1362                         /*
1363                          * If we're using an alignment buffer, and we're
1364                          * writing data, copy the real data out.
1365                          */
1366                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1367                                 bcopy(req->real_data, req->data, req->real_length);
1368                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1369                                 BUS_DMASYNC_PREWRITE);
1370                 }
1371
1372                 scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
1373                 scsi_req->sg_list = (TW_UINT8 *)segs;
1374                 scsi_req->sgl_entries += (nsegments - 1);
1375                 error = tw_cl_start_io(&(sc->ctlr_handle), req_pkt,
1376                         &(req->req_handle));
1377         }
1378
1379 out:
1380         if (error) {
1381                 req->error_code = error;
1382                 req_pkt->tw_osl_callback(&(req->req_handle));
1383                 /*
1384                  * If the caller had been returned EINPROGRESS, and he has
1385                  * registered a callback for handling completion, the callback
1386                  * will never get called because we were unable to submit the
1387                  * request.  So, free up the request right here.
1388                  */
1389                 if (req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)
1390                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1391         }
1392 }
1393
1394
1395
1396 /*
1397  * Function name:       twa_map_load_callback
1398  * Description:         Callback of bus_dmamap_load for the buffer associated
1399  *                      with a cmd pkt.
1400  *
1401  * Input:               arg     -- ptr to variable to hold phys addr
1402  *                      segs    -- ptr to a list of segment descriptors
1403  *                      nsegments--# of segments
1404  *                      error   -- 0 if no errors encountered before callback,
1405  *                                 non-zero if errors were encountered
1406  * Output:              None
1407  * Return value:        None
1408  */
1409 static TW_VOID
1410 twa_map_load_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1411         TW_INT32 nsegments, TW_INT32 error)
1412 {
1413         *((bus_addr_t *)arg) = segs[0].ds_addr;
1414 }
1415
1416
1417
1418 /*
1419  * Function name:       tw_osli_map_request
1420  * Description:         Maps a cmd pkt and data associated with it, into
1421  *                      DMA'able memory.
1422  *
1423  * Input:               req     -- ptr to request pkt
1424  * Output:              None
1425  * Return value:        0       -- success
1426  *                      non-zero-- failure
1427  */
1428 TW_INT32
1429 tw_osli_map_request(struct tw_osli_req_context *req)
1430 {
1431         struct twa_softc        *sc = req->ctlr;
1432         TW_INT32                error = 0;
1433
1434         tw_osli_dbg_dprintf(10, sc, "entered");
1435
1436         /* If the command involves data, map that too. */
1437         if (req->data != NULL) {
1438                 /*
1439                  * It's sufficient for the data pointer to be 4-byte aligned
1440                  * to work with 9000.  However, if 4-byte aligned addresses
1441                  * are passed to bus_dmamap_load, we can get back sg elements
1442                  * that are not 512-byte multiples in size.  So, we will let
1443                  * only those buffers that are 512-byte aligned to pass
1444                  * through, and bounce the rest, so as to make sure that we
1445                  * always get back sg elements that are 512-byte multiples
1446                  * in size.
1447                  */
1448                 if (((vm_offset_t)req->data % sc->sg_size_factor) ||
1449                         (req->length % sc->sg_size_factor)) {
1450                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED;
1451                         /* Save original data pointer and length. */
1452                         req->real_data = req->data;
1453                         req->real_length = req->length;
1454                         req->length = (req->length +
1455                                 (sc->sg_size_factor - 1)) &
1456                                 ~(sc->sg_size_factor - 1);
1457                         req->data = kmalloc(req->length, TW_OSLI_MALLOC_CLASS,
1458                                         M_NOWAIT);
1459                         if (req->data == NULL) {
1460                                 tw_osli_printf(sc, "error = %d",
1461                                         TW_CL_SEVERITY_ERROR_STRING,
1462                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1463                                         0x201E,
1464                                         "Failed to allocate memory "
1465                                         "for bounce buffer",
1466                                         ENOMEM);
1467                                 /* Restore original data pointer and length. */
1468                                 req->data = req->real_data;
1469                                 req->length = req->real_length;
1470                                 return(ENOMEM);
1471                         }
1472                 }
1473
1474                 /*
1475                  * Map the data buffer into bus space and build the SG list.
1476                  */
1477                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1478                         /* Lock against multiple simultaneous ioctl calls. */
1479                         spin_lock(sc->io_lock);
1480                         error = bus_dmamap_load(sc->ioctl_tag, sc->ioctl_map,
1481                                 req->data, req->length,
1482                                 twa_map_load_data_callback, req,
1483                                 BUS_DMA_WAITOK);
1484                         spin_unlock(sc->io_lock);
1485                 } else {
1486                         /*
1487                          * There's only one CAM I/O thread running at a time.
1488                          * So, there's no need to hold the io_lock.
1489                          */
1490                         error = bus_dmamap_load(sc->dma_tag, req->dma_map,
1491                                 req->data, req->length,
1492                                 twa_map_load_data_callback, req,
1493                                 BUS_DMA_WAITOK);
1494                 }
1495
1496                 if (!error)
1497                         error = req->error_code;
1498                 else {
1499                         if (error == EINPROGRESS) {
1500                                 /*
1501                                  * Specifying sc->io_lock as the lockfuncarg
1502                                  * in ...tag_create should protect the access
1503                                  * of ...FLAGS_MAPPED from the callback.
1504                                  */
1505                                 spin_lock(sc->io_lock);
1506                                 if (!(req->flags & TW_OSLI_REQ_FLAGS_MAPPED))
1507                                         req->flags |= TW_OSLI_REQ_FLAGS_IN_PROGRESS;
1508                                 tw_osli_disallow_new_requests(sc, &(req->req_handle));
1509                                 spin_unlock(sc->io_lock);
1510                                 error = 0;
1511                         } else {
1512                                 tw_osli_printf(sc, "error = %d",
1513                                         TW_CL_SEVERITY_ERROR_STRING,
1514                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1515                                         0x9999,
1516                                         "Failed to map DMA memory "
1517                                         "for I/O request",
1518                                         error);
1519                                 req->flags |= TW_OSLI_REQ_FLAGS_FAILED;
1520                                 /* Free alignment buffer if it was used. */
1521                                 if (req->flags &
1522                                         TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1523                                         kfree(req->data, TW_OSLI_MALLOC_CLASS);
1524                                         /*
1525                                          * Restore original data pointer
1526                                          * and length.
1527                                          */
1528                                         req->data = req->real_data;
1529                                         req->length = req->real_length;
1530                                 }
1531                         }
1532                 }
1533
1534         } else {
1535                 /* Mark the request as currently being processed. */
1536                 req->state = TW_OSLI_REQ_STATE_BUSY;
1537                 /* Move the request into the busy queue. */
1538                 tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1539                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU)
1540                         error = tw_cl_fw_passthru(&sc->ctlr_handle,
1541                                         &(req->req_pkt), &(req->req_handle));
1542                 else
1543                         error = tw_cl_start_io(&sc->ctlr_handle,
1544                                         &(req->req_pkt), &(req->req_handle));
1545                 if (error) {
1546                         req->error_code = error;
1547                         req->req_pkt.tw_osl_callback(&(req->req_handle));
1548                 }
1549         }
1550         return(error);
1551 }
1552
1553
1554
1555 /*
1556  * Function name:       tw_osli_unmap_request
1557  * Description:         Undoes the mapping done by tw_osli_map_request.
1558  *
1559  * Input:               req     -- ptr to request pkt
1560  * Output:              None
1561  * Return value:        None
1562  */
1563 TW_VOID
1564 tw_osli_unmap_request(struct tw_osli_req_context *req)
1565 {
1566         struct twa_softc        *sc = req->ctlr;
1567
1568         tw_osli_dbg_dprintf(10, sc, "entered");
1569
1570         /* If the command involved data, unmap that too. */
1571         if (req->data != NULL) {
1572                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1573                         /* Lock against multiple simultaneous ioctl calls. */
1574                         spin_lock(sc->io_lock);
1575
1576                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1577                                 bus_dmamap_sync(sc->ioctl_tag,
1578                                         sc->ioctl_map, BUS_DMASYNC_POSTREAD);
1579
1580                                 /*
1581                                  * If we are using a bounce buffer, and we are
1582                                  * reading data, copy the real data in.
1583                                  */
1584                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1585                                         bcopy(req->data, req->real_data,
1586                                                 req->real_length);
1587                         }
1588
1589                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1590                                 bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1591                                         BUS_DMASYNC_POSTWRITE);
1592
1593                         bus_dmamap_unload(sc->ioctl_tag, sc->ioctl_map);
1594
1595                         spin_unlock(sc->io_lock);
1596                 } else {
1597                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1598                                 bus_dmamap_sync(sc->dma_tag,
1599                                         req->dma_map, BUS_DMASYNC_POSTREAD);
1600
1601                                 /*
1602                                  * If we are using a bounce buffer, and we are
1603                                  * reading data, copy the real data in.
1604                                  */
1605                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1606                                         bcopy(req->data, req->real_data,
1607                                                 req->real_length);
1608                         }
1609                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1610                                 bus_dmamap_sync(sc->dma_tag, req->dma_map,
1611                                         BUS_DMASYNC_POSTWRITE);
1612
1613                         bus_dmamap_unload(sc->dma_tag, req->dma_map);
1614                 }
1615         }
1616
1617         /* Free alignment buffer if it was used. */
1618         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1619                 kfree(req->data, TW_OSLI_MALLOC_CLASS);
1620                 /* Restore original data pointer and length. */
1621                 req->data = req->real_data;
1622                 req->length = req->real_length;
1623         }
1624 }
1625
1626
1627
1628 #ifdef TW_OSL_DEBUG
1629
1630 TW_VOID twa_report_stats(TW_VOID);
1631 TW_VOID twa_reset_stats(TW_VOID);
1632 TW_VOID tw_osli_print_ctlr_stats(struct twa_softc *sc);
1633 TW_VOID twa_print_req_info(struct tw_osli_req_context *req);
1634
1635
1636 /*
1637  * Function name:       twa_report_stats
1638  * Description:         For being called from ddb.  Calls functions that print
1639  *                      OSL and CL internal stats for the controller.
1640  *
1641  * Input:               None
1642  * Output:              None
1643  * Return value:        None
1644  */
1645 TW_VOID
1646 twa_report_stats(TW_VOID)
1647 {
1648         struct twa_softc        *sc;
1649         TW_INT32                i;
1650
1651         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1652                 tw_osli_print_ctlr_stats(sc);
1653                 tw_cl_print_ctlr_stats(&sc->ctlr_handle);
1654         }
1655 }
1656
1657
1658
1659 /*
1660  * Function name:       tw_osli_print_ctlr_stats
1661  * Description:         For being called from ddb.  Prints OSL controller stats
1662  *
1663  * Input:               sc      -- ptr to OSL internal controller context
1664  * Output:              None
1665  * Return value:        None
1666  */
1667 TW_VOID
1668 tw_osli_print_ctlr_stats(struct twa_softc *sc)
1669 {
1670         twa_printf(sc, "osl_ctlr_ctxt = %p\n", sc);
1671         twa_printf(sc, "OSLq type  current  max\n");
1672         twa_printf(sc, "free      %04d     %04d\n",
1673                 sc->q_stats[TW_OSLI_FREE_Q].cur_len,
1674                 sc->q_stats[TW_OSLI_FREE_Q].max_len);
1675         twa_printf(sc, "busy      %04d     %04d\n",
1676                 sc->q_stats[TW_OSLI_BUSY_Q].cur_len,
1677                 sc->q_stats[TW_OSLI_BUSY_Q].max_len);
1678 }
1679
1680
1681
1682 /*
1683  * Function name:       twa_print_req_info
1684  * Description:         For being called from ddb.  Calls functions that print
1685  *                      OSL and CL internal details for the request.
1686  *
1687  * Input:               req     -- ptr to OSL internal request context
1688  * Output:              None
1689  * Return value:        None
1690  */
1691 TW_VOID
1692 twa_print_req_info(struct tw_osli_req_context *req)
1693 {
1694         struct twa_softc        *sc = req->ctlr;
1695
1696         twa_printf(sc, "OSL details for request:\n");
1697         twa_printf(sc, "osl_req_ctxt = %p, cl_req_ctxt = %p\n"
1698                 "data = %p, length = 0x%x, real_data = %p, real_length = 0x%x\n"
1699                 "state = 0x%x, flags = 0x%x, error = 0x%x, orig_req = %p\n"
1700                 "next_req = %p, prev_req = %p, dma_map = %p\n",
1701                 req->req_handle.osl_req_ctxt, req->req_handle.cl_req_ctxt,
1702                 req->data, req->length, req->real_data, req->real_length,
1703                 req->state, req->flags, req->error_code, req->orig_req,
1704                 req->link.next, req->link.prev, req->dma_map);
1705         tw_cl_print_req_info(&(req->req_handle));
1706 }
1707
1708
1709
1710 /*
1711  * Function name:       twa_reset_stats
1712  * Description:         For being called from ddb.
1713  *                      Resets some OSL controller stats.
1714  *
1715  * Input:               None
1716  * Output:              None
1717  * Return value:        None
1718  */
1719 TW_VOID
1720 twa_reset_stats(TW_VOID)
1721 {
1722         struct twa_softc        *sc;
1723         TW_INT32                i;
1724
1725         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1726                 sc->q_stats[TW_OSLI_FREE_Q].max_len = 0;
1727                 sc->q_stats[TW_OSLI_BUSY_Q].max_len = 0;
1728                 tw_cl_reset_stats(&sc->ctlr_handle);
1729         }
1730 }
1731
1732 #endif /* TW_OSL_DEBUG */