sys/dev/twa/tw_osl_freebsd.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2004-07 Applied Micro Circuits Corporation.
   5  * Copyright (c) 2004-05 Vinod Kashyap.
   6  * Copyright (c) 2000 Michael Smith
   7  * Copyright (c) 2000 BSDi
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 /*
  36  * AMCC'S 3ware driver for 9000 series storage controllers.
  37  *
  38  * Author: Vinod Kashyap
  39  * Modifications by: Adam Radford
  40  * Modifications by: Manjunath Ranganathaiah
  41  */
  42
  43
  44 /*
  45  * FreeBSD specific functions not related to CAM, and other
  46  * miscellaneous functions.
  47  */
  48
  49
  50 #include <dev/twa/tw_osl_includes.h>
  51 #include <dev/twa/tw_cl_fwif.h>
  52 #include <dev/twa/tw_cl_ioctl.h>
  53 #include <dev/twa/tw_osl_ioctl.h>
  54
  55 #ifdef TW_OSL_DEBUG
  56 TW_INT32        TW_DEBUG_LEVEL_FOR_OSL = TW_OSL_DEBUG;
  57 TW_INT32        TW_OSL_DEBUG_LEVEL_FOR_CL = TW_OSL_DEBUG;
  58 #endif /* TW_OSL_DEBUG */
  59
  60 static MALLOC_DEFINE(TW_OSLI_MALLOC_CLASS, "twa_commands", "twa commands");
  61
  62
  63 static  d_open_t                twa_open;
  64 static  d_close_t               twa_close;
  65 static  d_ioctl_t               twa_ioctl;
  66
  67 static struct cdevsw twa_cdevsw = {
  68         .d_version =    D_VERSION,
  69         .d_open =       twa_open,
  70         .d_close =      twa_close,
  71         .d_ioctl =      twa_ioctl,
  72         .d_name =       "twa",
  73 };
  74
  75 static devclass_t       twa_devclass;
  76
  77
  78 /*
  79  * Function name:       twa_open
  80  * Description:         Called when the controller is opened.
  81  *                      Simply marks the controller as open.
  82  *
  83  * Input:               dev     -- control device corresponding to the ctlr
  84  *                      flags   -- mode of open
  85  *                      fmt     -- device type (character/block etc.)
  86  *                      proc    -- current process
  87  * Output:              None
  88  * Return value:        0       -- success
  89  *                      non-zero-- failure
  90  */
  91 static TW_INT32
  92 twa_open(struct cdev *dev, TW_INT32 flags, TW_INT32 fmt, struct thread *proc)
  93 {
  94         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
  95
  96         tw_osli_dbg_dprintf(5, sc, "entered");
  97         sc->open = TW_CL_TRUE;
  98         return(0);
  99 }
 100
 101
 102
 103 /*
 104  * Function name:       twa_close
 105  * Description:         Called when the controller is closed.
 106  *                      Simply marks the controller as not open.
 107  *
 108  * Input:               dev     -- control device corresponding to the ctlr
 109  *                      flags   -- mode of corresponding open
 110  *                      fmt     -- device type (character/block etc.)
 111  *                      proc    -- current process
 112  * Output:              None
 113  * Return value:        0       -- success
 114  *                      non-zero-- failure
 115  */
 116 static TW_INT32
 117 twa_close(struct cdev *dev, TW_INT32 flags, TW_INT32 fmt, struct thread *proc)
 118 {
 119         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 120
 121         tw_osli_dbg_dprintf(5, sc, "entered");
 122         sc->open = TW_CL_FALSE;
 123         return(0);
 124 }
 125
 126
 127
 128 /*
 129  * Function name:       twa_ioctl
 130  * Description:         Called when an ioctl is posted to the controller.
 131  *                      Handles any OS Layer specific cmds, passes the rest
 132  *                      on to the Common Layer.
 133  *
 134  * Input:               dev     -- control device corresponding to the ctlr
 135  *                      cmd     -- ioctl cmd
 136  *                      buf     -- ptr to buffer in kernel memory, which is
 137  *                                 a copy of the input buffer in user-space
 138  *                      flags   -- mode of corresponding open
 139  *                      proc    -- current process
 140  * Output:              buf     -- ptr to buffer in kernel memory, which will
 141  *                                 be copied to the output buffer in user-space
 142  * Return value:        0       -- success
 143  *                      non-zero-- failure
 144  */
 145 static TW_INT32
 146 twa_ioctl(struct cdev *dev, u_long cmd, caddr_t buf, TW_INT32 flags, struct thread *proc)
 147 {
 148         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 149         TW_INT32                error;
 150
 151         tw_osli_dbg_dprintf(5, sc, "entered");
 152
 153         switch (cmd) {
 154         case TW_OSL_IOCTL_FIRMWARE_PASS_THROUGH:
 155                 tw_osli_dbg_dprintf(6, sc, "ioctl: fw_passthru");
 156                 error = tw_osli_fw_passthru(sc, (TW_INT8 *)buf);
 157                 break;
 158
 159         case TW_OSL_IOCTL_SCAN_BUS:
 160                 /* Request CAM for a bus scan. */
 161                 tw_osli_dbg_dprintf(6, sc, "ioctl: scan bus");
 162                 error = tw_osli_request_bus_scan(sc);
 163                 break;
 164
 165         default:
 166                 tw_osli_dbg_dprintf(6, sc, "ioctl: 0x%lx", cmd);
 167                 error = tw_cl_ioctl(&sc->ctlr_handle, cmd, buf);
 168                 break;
 169         }
 170         return(error);
 171 }
 172
 173
 174
 175 static TW_INT32 twa_probe(device_t dev);
 176 static TW_INT32 twa_attach(device_t dev);
 177 static TW_INT32 twa_detach(device_t dev);
 178 static TW_INT32 twa_shutdown(device_t dev);
 179 static TW_VOID  twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op);
 180 static TW_VOID  twa_pci_intr(TW_VOID *arg);
 181 static TW_VOID  twa_watchdog(TW_VOID *arg);
 182 int twa_setup_intr(struct twa_softc *sc);
 183 int twa_teardown_intr(struct twa_softc *sc);
 184
 185 static TW_INT32 tw_osli_alloc_mem(struct twa_softc *sc);
 186 static TW_VOID  tw_osli_free_resources(struct twa_softc *sc);
 187
 188 static TW_VOID  twa_map_load_data_callback(TW_VOID *arg,
 189         bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
 190 static TW_VOID  twa_map_load_callback(TW_VOID *arg,
 191         bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
 192
 193
 194 static device_method_t  twa_methods[] = {
 195         /* Device interface */
 196         DEVMETHOD(device_probe,         twa_probe),
 197         DEVMETHOD(device_attach,        twa_attach),
 198         DEVMETHOD(device_detach,        twa_detach),
 199         DEVMETHOD(device_shutdown,      twa_shutdown),
 200
 201         DEVMETHOD_END
 202 };
 203
 204 static driver_t twa_pci_driver = {
 205         "twa",
 206         twa_methods,
 207         sizeof(struct twa_softc)
 208 };
 209
 210 DRIVER_MODULE(twa, pci, twa_pci_driver, twa_devclass, 0, 0);
 211 MODULE_DEPEND(twa, cam, 1, 1, 1);
 212 MODULE_DEPEND(twa, pci, 1, 1, 1);
 213
 214
 215 /*
 216  * Function name:       twa_probe
 217  * Description:         Called at driver load time.  Claims 9000 ctlrs.
 218  *
 219  * Input:               dev     -- bus device corresponding to the ctlr
 220  * Output:              None
 221  * Return value:        <= 0    -- success
 222  *                      > 0     -- failure
 223  */
 224 static TW_INT32
 225 twa_probe(device_t dev)
 226 {
 227         static TW_UINT8 first_ctlr = 1;
 228
 229         tw_osli_dbg_printf(3, "entered");
 230
 231         if (tw_cl_ctlr_supported(pci_get_vendor(dev), pci_get_device(dev))) {
 232                 device_set_desc(dev, TW_OSLI_DEVICE_NAME);
 233                 /* Print the driver version only once. */
 234                 if (first_ctlr) {
 235                         printf("3ware device driver for 9000 series storage "
 236                                 "controllers, version: %s\n",
 237                                 TW_OSL_DRIVER_VERSION_STRING);
 238                         first_ctlr = 0;
 239                 }
 240                 return(0);
 241         }
 242         return(ENXIO);
 243 }
 244
 245 int twa_setup_intr(struct twa_softc *sc)
 246 {
 247         int error = 0;
 248
 249         if (!(sc->intr_handle) && (sc->irq_res)) {
 250                 error = bus_setup_intr(sc->bus_dev, sc->irq_res,
 251                                         INTR_TYPE_CAM | INTR_MPSAFE,
 252                                         NULL, twa_pci_intr,
 253                                         sc, &sc->intr_handle);
 254         }
 255         return( error );
 256 }
 257
 258
 259 int twa_teardown_intr(struct twa_softc *sc)
 260 {
 261         int error = 0;
 262
 263         if ((sc->intr_handle) && (sc->irq_res)) {
 264                 error = bus_teardown_intr(sc->bus_dev,
 265                                                 sc->irq_res, sc->intr_handle);
 266                 sc->intr_handle = NULL;
 267         }
 268         return( error );
 269 }
 270
 271
 272
 273 /*
 274  * Function name:       twa_attach
 275  * Description:         Allocates pci resources; updates sc; adds a node to the
 276  *                      sysctl tree to expose the driver version; makes calls
 277  *                      (to the Common Layer) to initialize ctlr, and to
 278  *                      attach to CAM.
 279  *
 280  * Input:               dev     -- bus device corresponding to the ctlr
 281  * Output:              None
 282  * Return value:        0       -- success
 283  *                      non-zero-- failure
 284  */
 285 static TW_INT32
 286 twa_attach(device_t dev)
 287 {
 288         struct twa_softc        *sc = device_get_softc(dev);
 289         TW_INT32                bar_num;
 290         TW_INT32                bar0_offset;
 291         TW_INT32                bar_size;
 292         TW_INT32                error;
 293
 294         tw_osli_dbg_dprintf(3, sc, "entered");
 295
 296         sc->ctlr_handle.osl_ctlr_ctxt = sc;
 297
 298         /* Initialize the softc structure. */
 299         sc->bus_dev = dev;
 300         sc->device_id = pci_get_device(dev);
 301
 302         /* Initialize the mutexes right here. */
 303         sc->io_lock = &(sc->io_lock_handle);
 304         mtx_init(sc->io_lock, "tw_osl_io_lock", NULL, MTX_SPIN);
 305         sc->q_lock = &(sc->q_lock_handle);
 306         mtx_init(sc->q_lock, "tw_osl_q_lock", NULL, MTX_SPIN);
 307         sc->sim_lock = &(sc->sim_lock_handle);
 308         mtx_init(sc->sim_lock, "tw_osl_sim_lock", NULL, MTX_DEF | MTX_RECURSE);
 309
 310         sysctl_ctx_init(&sc->sysctl_ctxt);
 311         sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctxt,
 312             SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, device_get_nameunit(dev),
 313             CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "");
 314         if (sc->sysctl_tree == NULL) {
 315                 tw_osli_printf(sc, "error = %d",
 316                         TW_CL_SEVERITY_ERROR_STRING,
 317                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 318                         0x2000,
 319                         "Cannot add sysctl tree node",
 320                         ENXIO);
 321                 return(ENXIO);
 322         }
 323         SYSCTL_ADD_STRING(&sc->sysctl_ctxt, SYSCTL_CHILDREN(sc->sysctl_tree),
 324                 OID_AUTO, "driver_version", CTLFLAG_RD,
 325                 TW_OSL_DRIVER_VERSION_STRING, 0, "TWA driver version");
 326
 327         /* Force the busmaster enable bit on, in case the BIOS forgot. */
 328         pci_enable_busmaster(dev);
 329
 330         /* Allocate the PCI register window. */
 331         if ((error = tw_cl_get_pci_bar_info(sc->device_id, TW_CL_BAR_TYPE_MEM,
 332                 &bar_num, &bar0_offset, &bar_size))) {
 333                 tw_osli_printf(sc, "error = %d",
 334                         TW_CL_SEVERITY_ERROR_STRING,
 335                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 336                         0x201F,
 337                         "Can't get PCI BAR info",
 338                         error);
 339                 tw_osli_free_resources(sc);
 340                 return(error);
 341         }
 342         sc->reg_res_id = PCIR_BARS + bar0_offset;
 343         if ((sc->reg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
 344                                 &(sc->reg_res_id), RF_ACTIVE))
 345                                 == NULL) {
 346                 tw_osli_printf(sc, "error = %d",
 347                         TW_CL_SEVERITY_ERROR_STRING,
 348                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 349                         0x2002,
 350                         "Can't allocate register window",
 351                         ENXIO);
 352                 tw_osli_free_resources(sc);
 353                 return(ENXIO);
 354         }
 355         sc->bus_tag = rman_get_bustag(sc->reg_res);
 356         sc->bus_handle = rman_get_bushandle(sc->reg_res);
 357
 358         /* Allocate and register our interrupt. */
 359         sc->irq_res_id = 0;
 360         if ((sc->irq_res = bus_alloc_resource_any(sc->bus_dev, SYS_RES_IRQ,
 361                                 &(sc->irq_res_id),
 362                                 RF_SHAREABLE | RF_ACTIVE)) == NULL) {
 363                 tw_osli_printf(sc, "error = %d",
 364                         TW_CL_SEVERITY_ERROR_STRING,
 365                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 366                         0x2003,
 367                         "Can't allocate interrupt",
 368                         ENXIO);
 369                 tw_osli_free_resources(sc);
 370                 return(ENXIO);
 371         }
 372         if ((error = twa_setup_intr(sc))) {
 373                 tw_osli_printf(sc, "error = %d",
 374                         TW_CL_SEVERITY_ERROR_STRING,
 375                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 376                         0x2004,
 377                         "Can't set up interrupt",
 378                         error);
 379                 tw_osli_free_resources(sc);
 380                 return(error);
 381         }
 382
 383         if ((error = tw_osli_alloc_mem(sc))) {
 384                 tw_osli_printf(sc, "error = %d",
 385                         TW_CL_SEVERITY_ERROR_STRING,
 386                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 387                         0x2005,
 388                         "Memory allocation failure",
 389                         error);
 390                 tw_osli_free_resources(sc);
 391                 return(error);
 392         }
 393
 394         /* Initialize the Common Layer for this controller. */
 395         if ((error = tw_cl_init_ctlr(&sc->ctlr_handle, sc->flags, sc->device_id,
 396                         TW_OSLI_MAX_NUM_REQUESTS, TW_OSLI_MAX_NUM_AENS,
 397                         sc->non_dma_mem, sc->dma_mem,
 398                         sc->dma_mem_phys
 399                         ))) {
 400                 tw_osli_printf(sc, "error = %d",
 401                         TW_CL_SEVERITY_ERROR_STRING,
 402                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 403                         0x2006,
 404                         "Failed to initialize Common Layer/controller",
 405                         error);
 406                 tw_osli_free_resources(sc);
 407                 return(error);
 408         }
 409
 410         /* Create the control device. */
 411         sc->ctrl_dev = make_dev(&twa_cdevsw, device_get_unit(sc->bus_dev),
 412                         UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR,
 413                         "twa%d", device_get_unit(sc->bus_dev));
 414         sc->ctrl_dev->si_drv1 = sc;
 415
 416         if ((error = tw_osli_cam_attach(sc))) {
 417                 tw_osli_free_resources(sc);
 418                 tw_osli_printf(sc, "error = %d",
 419                         TW_CL_SEVERITY_ERROR_STRING,
 420                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 421                         0x2007,
 422                         "Failed to initialize CAM",
 423                         error);
 424                 return(error);
 425         }
 426
 427         sc->watchdog_index = 0;
 428         callout_init(&(sc->watchdog_callout[0]), 1);
 429         callout_init(&(sc->watchdog_callout[1]), 1);
 430         callout_reset(&(sc->watchdog_callout[0]), 5*hz, twa_watchdog, &sc->ctlr_handle);
 431         gone_in_dev(dev, 13, "twa(4) removed");
 432
 433         return(0);
 434 }
 435
 436
 437 static TW_VOID
 438 twa_watchdog(TW_VOID *arg)
 439 {
 440         struct tw_cl_ctlr_handle *ctlr_handle =
 441                 (struct tw_cl_ctlr_handle *)arg;
 442         struct twa_softc                *sc = ctlr_handle->osl_ctlr_ctxt;
 443         int                             i;
 444         int                             i_need_a_reset = 0;
 445         int                             driver_is_active = 0;
 446         int                             my_watchdog_was_pending = 1234;
 447         TW_UINT64                       current_time;
 448         struct tw_osli_req_context      *my_req;
 449
 450
 451 //==============================================================================
 452         current_time = (TW_UINT64) (tw_osl_get_local_time());
 453
 454         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 455                 my_req = &(sc->req_ctx_buf[i]);
 456
 457                 if ((my_req->state == TW_OSLI_REQ_STATE_BUSY) &&
 458                         (my_req->deadline) &&
 459                         (my_req->deadline < current_time)) {
 460                         tw_cl_set_reset_needed(ctlr_handle);
 461 #ifdef    TW_OSL_DEBUG
 462                         device_printf((sc)->bus_dev, "Request %d timed out! d = %llu, c = %llu\n", i, my_req->deadline, current_time);
 463 #else  /* TW_OSL_DEBUG */
 464                         device_printf((sc)->bus_dev, "Request %d timed out!\n", i);
 465 #endif /* TW_OSL_DEBUG */
 466                         break;
 467                 }
 468         }
 469 //==============================================================================
 470
 471         i_need_a_reset = tw_cl_is_reset_needed(ctlr_handle);
 472
 473         i = (int) ((sc->watchdog_index++) & 1);
 474
 475         driver_is_active = tw_cl_is_active(ctlr_handle);
 476
 477         if (i_need_a_reset) {
 478 #ifdef    TW_OSL_DEBUG
 479                 device_printf((sc)->bus_dev, "Watchdog rescheduled in 70 seconds\n");
 480 #endif /* TW_OSL_DEBUG */
 481                 my_watchdog_was_pending =
 482                         callout_reset(&(sc->watchdog_callout[i]), 70*hz, twa_watchdog, &sc->ctlr_handle);
 483                 tw_cl_reset_ctlr(ctlr_handle);
 484 #ifdef    TW_OSL_DEBUG
 485                 device_printf((sc)->bus_dev, "Watchdog reset completed!\n");
 486 #endif /* TW_OSL_DEBUG */
 487         } else if (driver_is_active) {
 488                 my_watchdog_was_pending =
 489                         callout_reset(&(sc->watchdog_callout[i]),  5*hz, twa_watchdog, &sc->ctlr_handle);
 490         }
 491 #ifdef    TW_OSL_DEBUG
 492         if (i_need_a_reset || my_watchdog_was_pending)
 493                 device_printf((sc)->bus_dev, "i_need_a_reset = %d, "
 494                 "driver_is_active = %d, my_watchdog_was_pending = %d\n",
 495                 i_need_a_reset, driver_is_active, my_watchdog_was_pending);
 496 #endif /* TW_OSL_DEBUG */
 497 }
 498
 499
 500 /*
 501  * Function name:       tw_osli_alloc_mem
 502  * Description:         Allocates memory needed both by CL and OSL.
 503  *
 504  * Input:               sc      -- OSL internal controller context
 505  * Output:              None
 506  * Return value:        0       -- success
 507  *                      non-zero-- failure
 508  */
 509 static TW_INT32
 510 tw_osli_alloc_mem(struct twa_softc *sc)
 511 {
 512         struct tw_osli_req_context      *req;
 513         TW_UINT32                       max_sg_elements;
 514         TW_UINT32                       non_dma_mem_size;
 515         TW_UINT32                       dma_mem_size;
 516         TW_INT32                        error;
 517         TW_INT32                        i;
 518
 519         tw_osli_dbg_dprintf(3, sc, "entered");
 520
 521         sc->flags |= (sizeof(bus_addr_t) == 8) ? TW_CL_64BIT_ADDRESSES : 0;
 522         sc->flags |= (sizeof(bus_size_t) == 8) ? TW_CL_64BIT_SG_LENGTH : 0;
 523
 524         max_sg_elements = (sizeof(bus_addr_t) == 8) ?
 525                 TW_CL_MAX_64BIT_SG_ELEMENTS : TW_CL_MAX_32BIT_SG_ELEMENTS;
 526
 527         if ((error = tw_cl_get_mem_requirements(&sc->ctlr_handle, sc->flags,
 528                         sc->device_id, TW_OSLI_MAX_NUM_REQUESTS,  TW_OSLI_MAX_NUM_AENS,
 529                         &(sc->alignment), &(sc->sg_size_factor),
 530                         &non_dma_mem_size, &dma_mem_size
 531                         ))) {
 532                 tw_osli_printf(sc, "error = %d",
 533                         TW_CL_SEVERITY_ERROR_STRING,
 534                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 535                         0x2008,
 536                         "Can't get Common Layer's memory requirements",
 537                         error);
 538                 return(error);
 539         }
 540
 541         if ((sc->non_dma_mem = malloc(non_dma_mem_size, TW_OSLI_MALLOC_CLASS,
 542                                 M_WAITOK)) == NULL) {
 543                 tw_osli_printf(sc, "error = %d",
 544                         TW_CL_SEVERITY_ERROR_STRING,
 545                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 546                         0x2009,
 547                         "Can't allocate non-dma memory",
 548                         ENOMEM);
 549                 return(ENOMEM);
 550         }
 551
 552         /* Create the parent dma tag. */
 553         if (bus_dma_tag_create(bus_get_dma_tag(sc->bus_dev), /* parent */
 554                                 sc->alignment,          /* alignment */
 555                                 TW_OSLI_DMA_BOUNDARY,   /* boundary */
 556                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 557                                 BUS_SPACE_MAXADDR,      /* highaddr */
 558                                 NULL, NULL,             /* filter, filterarg */
 559                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 560                                 max_sg_elements,        /* nsegments */
 561                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 562                                 0,                      /* flags */
 563                                 NULL,                   /* lockfunc */
 564                                 NULL,                   /* lockfuncarg */
 565                                 &sc->parent_tag         /* tag */)) {
 566                 tw_osli_printf(sc, "error = %d",
 567                         TW_CL_SEVERITY_ERROR_STRING,
 568                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 569                         0x200A,
 570                         "Can't allocate parent DMA tag",
 571                         ENOMEM);
 572                 return(ENOMEM);
 573         }
 574
 575         /* Create a dma tag for Common Layer's DMA'able memory (dma_mem). */
 576         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 577                                 sc->alignment,          /* alignment */
 578                                 0,                      /* boundary */
 579                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 580                                 BUS_SPACE_MAXADDR,      /* highaddr */
 581                                 NULL, NULL,             /* filter, filterarg */
 582                                 dma_mem_size,           /* maxsize */
 583                                 1,                      /* nsegments */
 584                                 BUS_SPACE_MAXSIZE,      /* maxsegsize */
 585                                 0,                      /* flags */
 586                                 NULL,                   /* lockfunc */
 587                                 NULL,                   /* lockfuncarg */
 588                                 &sc->cmd_tag            /* tag */)) {
 589                 tw_osli_printf(sc, "error = %d",
 590                         TW_CL_SEVERITY_ERROR_STRING,
 591                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 592                         0x200B,
 593                         "Can't allocate DMA tag for Common Layer's "
 594                         "DMA'able memory",
 595                         ENOMEM);
 596                 return(ENOMEM);
 597         }
 598
 599         if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 600                 BUS_DMA_NOWAIT, &sc->cmd_map)) {
 601                 /* Try a second time. */
 602                 if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 603                         BUS_DMA_NOWAIT, &sc->cmd_map)) {
 604                         tw_osli_printf(sc, "error = %d",
 605                                 TW_CL_SEVERITY_ERROR_STRING,
 606                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 607                                 0x200C,
 608                                 "Can't allocate DMA'able memory for the"
 609                                 "Common Layer",
 610                                 ENOMEM);
 611                         return(ENOMEM);
 612                 }
 613         }
 614
 615         bus_dmamap_load(sc->cmd_tag, sc->cmd_map, sc->dma_mem,
 616                 dma_mem_size, twa_map_load_callback,
 617                 &sc->dma_mem_phys, 0);
 618
 619         /*
 620          * Create a dma tag for data buffers; size will be the maximum
 621          * possible I/O size (128kB).
 622          */
 623         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 624                                 sc->alignment,          /* alignment */
 625                                 0,                      /* boundary */
 626                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 627                                 BUS_SPACE_MAXADDR,      /* highaddr */
 628                                 NULL, NULL,             /* filter, filterarg */
 629                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 630                                 max_sg_elements,        /* nsegments */
 631                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 632                                 BUS_DMA_ALLOCNOW,       /* flags */
 633                                 twa_busdma_lock,        /* lockfunc */
 634                                 sc->io_lock,            /* lockfuncarg */
 635                                 &sc->dma_tag            /* tag */)) {
 636                 tw_osli_printf(sc, "error = %d",
 637                         TW_CL_SEVERITY_ERROR_STRING,
 638                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 639                         0x200F,
 640                         "Can't allocate DMA tag for data buffers",
 641                         ENOMEM);
 642                 return(ENOMEM);
 643         }
 644
 645         /*
 646          * Create a dma tag for ioctl data buffers; size will be the maximum
 647          * possible I/O size (128kB).
 648          */
 649         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 650                                 sc->alignment,          /* alignment */
 651                                 0,                      /* boundary */
 652                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 653                                 BUS_SPACE_MAXADDR,      /* highaddr */
 654                                 NULL, NULL,             /* filter, filterarg */
 655                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 656                                 max_sg_elements,        /* nsegments */
 657                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 658                                 BUS_DMA_ALLOCNOW,       /* flags */
 659                                 twa_busdma_lock,        /* lockfunc */
 660                                 sc->io_lock,            /* lockfuncarg */
 661                                 &sc->ioctl_tag          /* tag */)) {
 662                 tw_osli_printf(sc, "error = %d",
 663                         TW_CL_SEVERITY_ERROR_STRING,
 664                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 665                         0x2010,
 666                         "Can't allocate DMA tag for ioctl data buffers",
 667                         ENOMEM);
 668                 return(ENOMEM);
 669         }
 670
 671         /* Create just one map for all ioctl request data buffers. */
 672         if (bus_dmamap_create(sc->ioctl_tag, 0, &sc->ioctl_map)) {
 673                 tw_osli_printf(sc, "error = %d",
 674                         TW_CL_SEVERITY_ERROR_STRING,
 675                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 676                         0x2011,
 677                         "Can't create ioctl map",
 678                         ENOMEM);
 679                 return(ENOMEM);
 680         }
 681
 682
 683         /* Initialize request queues. */
 684         tw_osli_req_q_init(sc, TW_OSLI_FREE_Q);
 685         tw_osli_req_q_init(sc, TW_OSLI_BUSY_Q);
 686
 687         if ((sc->req_ctx_buf = (struct tw_osli_req_context *)
 688                         malloc((sizeof(struct tw_osli_req_context) *
 689                                 TW_OSLI_MAX_NUM_REQUESTS),
 690                                 TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
 691                 tw_osli_printf(sc, "error = %d",
 692                         TW_CL_SEVERITY_ERROR_STRING,
 693                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 694                         0x2012,
 695                         "Failed to allocate request packets",
 696                         ENOMEM);
 697                 return(ENOMEM);
 698         }
 699         bzero(sc->req_ctx_buf,
 700                 sizeof(struct tw_osli_req_context) * TW_OSLI_MAX_NUM_REQUESTS);
 701
 702         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 703                 req = &(sc->req_ctx_buf[i]);
 704                 req->ctlr = sc;
 705                 if (bus_dmamap_create(sc->dma_tag, 0, &req->dma_map)) {
 706                         tw_osli_printf(sc, "request # = %d, error = %d",
 707                                 TW_CL_SEVERITY_ERROR_STRING,
 708                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 709                                 0x2013,
 710                                 "Can't create dma map",
 711                                 i, ENOMEM);
 712                         return(ENOMEM);
 713                 }
 714
 715                 /* Initialize the ioctl wakeup/ timeout mutex */
 716                 req->ioctl_wake_timeout_lock = &(req->ioctl_wake_timeout_lock_handle);
 717                 mtx_init(req->ioctl_wake_timeout_lock, "tw_ioctl_wake_timeout_lock", NULL, MTX_DEF);
 718
 719                 /* Insert request into the free queue. */
 720                 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 721         }
 722
 723         return(0);
 724 }
 725
 726
 727
 728 /*
 729  * Function name:       tw_osli_free_resources
 730  * Description:         Performs clean-up at the time of going down.
 731  *
 732  * Input:               sc      -- ptr to OSL internal ctlr context
 733  * Output:              None
 734  * Return value:        None
 735  */
 736 static TW_VOID
 737 tw_osli_free_resources(struct twa_softc *sc)
 738 {
 739         struct tw_osli_req_context      *req;
 740         TW_INT32                        error = 0;
 741
 742         tw_osli_dbg_dprintf(3, sc, "entered");
 743
 744         /* Detach from CAM */
 745         tw_osli_cam_detach(sc);
 746
 747         if (sc->req_ctx_buf)
 748                 while ((req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q)) !=
 749                         NULL) {
 750                         mtx_destroy(req->ioctl_wake_timeout_lock);
 751
 752                         if ((error = bus_dmamap_destroy(sc->dma_tag,
 753                                         req->dma_map)))
 754                                 tw_osli_dbg_dprintf(1, sc,
 755                                         "dmamap_destroy(dma) returned %d",
 756                                         error);
 757                 }
 758
 759         if ((sc->ioctl_tag) && (sc->ioctl_map))
 760                 if ((error = bus_dmamap_destroy(sc->ioctl_tag, sc->ioctl_map)))
 761                         tw_osli_dbg_dprintf(1, sc,
 762                                 "dmamap_destroy(ioctl) returned %d", error);
 763
 764         /* Free all memory allocated so far. */
 765         if (sc->req_ctx_buf)
 766                 free(sc->req_ctx_buf, TW_OSLI_MALLOC_CLASS);
 767
 768         if (sc->non_dma_mem)
 769                 free(sc->non_dma_mem, TW_OSLI_MALLOC_CLASS);
 770
 771         if (sc->dma_mem) {
 772                 bus_dmamap_unload(sc->cmd_tag, sc->cmd_map);
 773                 bus_dmamem_free(sc->cmd_tag, sc->dma_mem,
 774                         sc->cmd_map);
 775         }
 776         if (sc->cmd_tag)
 777                 if ((error = bus_dma_tag_destroy(sc->cmd_tag)))
 778                         tw_osli_dbg_dprintf(1, sc,
 779                                 "dma_tag_destroy(cmd) returned %d", error);
 780
 781         if (sc->dma_tag)
 782                 if ((error = bus_dma_tag_destroy(sc->dma_tag)))
 783                         tw_osli_dbg_dprintf(1, sc,
 784                                 "dma_tag_destroy(dma) returned %d", error);
 785
 786         if (sc->ioctl_tag)
 787                 if ((error = bus_dma_tag_destroy(sc->ioctl_tag)))
 788                         tw_osli_dbg_dprintf(1, sc,
 789                                 "dma_tag_destroy(ioctl) returned %d", error);
 790
 791         if (sc->parent_tag)
 792                 if ((error = bus_dma_tag_destroy(sc->parent_tag)))
 793                         tw_osli_dbg_dprintf(1, sc,
 794                                 "dma_tag_destroy(parent) returned %d", error);
 795
 796
 797         /* Disconnect the interrupt handler. */
 798         if ((error = twa_teardown_intr(sc)))
 799                         tw_osli_dbg_dprintf(1, sc,
 800                                 "teardown_intr returned %d", error);
 801
 802         if (sc->irq_res != NULL)
 803                 if ((error = bus_release_resource(sc->bus_dev,
 804                                 SYS_RES_IRQ, sc->irq_res_id, sc->irq_res)))
 805                         tw_osli_dbg_dprintf(1, sc,
 806                                 "release_resource(irq) returned %d", error);
 807
 808
 809         /* Release the register window mapping. */
 810         if (sc->reg_res != NULL)
 811                 if ((error = bus_release_resource(sc->bus_dev,
 812                                 SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res)))
 813                         tw_osli_dbg_dprintf(1, sc,
 814                                 "release_resource(io) returned %d", error);
 815
 816
 817         /* Destroy the control device. */
 818         if (sc->ctrl_dev != (struct cdev *)NULL)
 819                 destroy_dev(sc->ctrl_dev);
 820
 821         if ((error = sysctl_ctx_free(&sc->sysctl_ctxt)))
 822                 tw_osli_dbg_dprintf(1, sc,
 823                         "sysctl_ctx_free returned %d", error);
 824
 825 }
 826
 827
 828
 829 /*
 830  * Function name:       twa_detach
 831  * Description:         Called when the controller is being detached from
 832  *                      the pci bus.
 833  *
 834  * Input:               dev     -- bus device corresponding to the ctlr
 835  * Output:              None
 836  * Return value:        0       -- success
 837  *                      non-zero-- failure
 838  */
 839 static TW_INT32
 840 twa_detach(device_t dev)
 841 {
 842         struct twa_softc        *sc = device_get_softc(dev);
 843         TW_INT32                error;
 844
 845         tw_osli_dbg_dprintf(3, sc, "entered");
 846
 847         error = EBUSY;
 848         if (sc->open) {
 849                 tw_osli_printf(sc, "error = %d",
 850                         TW_CL_SEVERITY_ERROR_STRING,
 851                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 852                         0x2014,
 853                         "Device open",
 854                         error);
 855                 goto out;
 856         }
 857
 858         /* Shut the controller down. */
 859         if ((error = twa_shutdown(dev)))
 860                 goto out;
 861
 862         /* Free all resources associated with this controller. */
 863         tw_osli_free_resources(sc);
 864         error = 0;
 865
 866 out:
 867         return(error);
 868 }
 869
 870
 871
 872 /*
 873  * Function name:       twa_shutdown
 874  * Description:         Called at unload/shutdown time.  Lets the controller
 875  *                      know that we are going down.
 876  *
 877  * Input:               dev     -- bus device corresponding to the ctlr
 878  * Output:              None
 879  * Return value:        0       -- success
 880  *                      non-zero-- failure
 881  */
 882 static TW_INT32
 883 twa_shutdown(device_t dev)
 884 {
 885         struct twa_softc        *sc = device_get_softc(dev);
 886         TW_INT32                error = 0;
 887
 888         tw_osli_dbg_dprintf(3, sc, "entered");
 889
 890         /* Disconnect interrupts. */
 891         error = twa_teardown_intr(sc);
 892
 893         /* Stop watchdog task. */
 894         callout_drain(&(sc->watchdog_callout[0]));
 895         callout_drain(&(sc->watchdog_callout[1]));
 896
 897         /* Disconnect from the controller. */
 898         if ((error = tw_cl_shutdown_ctlr(&(sc->ctlr_handle), 0))) {
 899                 tw_osli_printf(sc, "error = %d",
 900                         TW_CL_SEVERITY_ERROR_STRING,
 901                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 902                         0x2015,
 903                         "Failed to shutdown Common Layer/controller",
 904                         error);
 905         }
 906         return(error);
 907 }
 908
 909
 910
 911 /*
 912  * Function name:       twa_busdma_lock
 913  * Description:         Function to provide synchronization during busdma_swi.
 914  *
 915  * Input:               lock_arg -- lock mutex sent as argument
 916  *                      op -- operation (lock/unlock) expected of the function
 917  * Output:              None
 918  * Return value:        None
 919  */
 920 TW_VOID
 921 twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op)
 922 {
 923         struct mtx      *lock;
 924
 925         lock = (struct mtx *)lock_arg;
 926         switch (op) {
 927         case BUS_DMA_LOCK:
 928                 mtx_lock_spin(lock);
 929                 break;
 930
 931         case BUS_DMA_UNLOCK:
 932                 mtx_unlock_spin(lock);
 933                 break;
 934
 935         default:
 936                 panic("Unknown operation 0x%x for twa_busdma_lock!", op);
 937         }
 938 }
 939
 940
 941 /*
 942  * Function name:       twa_pci_intr
 943  * Description:         Interrupt handler.  Wrapper for twa_interrupt.
 944  *
 945  * Input:               arg     -- ptr to OSL internal ctlr context
 946  * Output:              None
 947  * Return value:        None
 948  */
 949 static TW_VOID
 950 twa_pci_intr(TW_VOID *arg)
 951 {
 952         struct twa_softc        *sc = (struct twa_softc *)arg;
 953
 954         tw_osli_dbg_dprintf(10, sc, "entered");
 955         tw_cl_interrupt(&(sc->ctlr_handle));
 956 }
 957
 958
 959 /*
 960  * Function name:       tw_osli_fw_passthru
 961  * Description:         Builds a fw passthru cmd pkt, and submits it to CL.
 962  *
 963  * Input:               sc      -- ptr to OSL internal ctlr context
 964  *                      buf     -- ptr to ioctl pkt understood by CL
 965  * Output:              None
 966  * Return value:        0       -- success
 967  *                      non-zero-- failure
 968  */
 969 TW_INT32
 970 tw_osli_fw_passthru(struct twa_softc *sc, TW_INT8 *buf)
 971 {
 972         struct tw_osli_req_context              *req;
 973         struct tw_osli_ioctl_no_data_buf        *user_buf =
 974                 (struct tw_osli_ioctl_no_data_buf *)buf;
 975         TW_TIME                                 end_time;
 976         TW_UINT32                               timeout = 60;
 977         TW_UINT32                               data_buf_size_adjusted;
 978         struct tw_cl_req_packet                 *req_pkt;
 979         struct tw_cl_passthru_req_packet        *pt_req;
 980         TW_INT32                                error;
 981
 982         tw_osli_dbg_dprintf(5, sc, "ioctl: passthru");
 983
 984         if ((req = tw_osli_get_request(sc)) == NULL)
 985                 return(EBUSY);
 986
 987         req->req_handle.osl_req_ctxt = req;
 988         req->orig_req = buf;
 989         req->flags |= TW_OSLI_REQ_FLAGS_PASSTHRU;
 990
 991         req_pkt = &(req->req_pkt);
 992         req_pkt->status = 0;
 993         req_pkt->tw_osl_callback = tw_osl_complete_passthru;
 994         /* Let the Common Layer retry the request on cmd queue full. */
 995         req_pkt->flags |= TW_CL_REQ_RETRY_ON_BUSY;
 996
 997         pt_req = &(req_pkt->gen_req_pkt.pt_req);
 998         /*
 999          * Make sure that the data buffer sent to firmware is a
1000          * 512 byte multiple in size.
1001          */
1002         data_buf_size_adjusted =
1003                 (user_buf->driver_pkt.buffer_length +
1004                 (sc->sg_size_factor - 1)) & ~(sc->sg_size_factor - 1);
1005         if ((req->length = data_buf_size_adjusted)) {
1006                 if ((req->data = malloc(data_buf_size_adjusted,
1007                         TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
1008                         error = ENOMEM;
1009                         tw_osli_printf(sc, "error = %d",
1010                                 TW_CL_SEVERITY_ERROR_STRING,
1011                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1012                                 0x2016,
1013                                 "Could not alloc mem for "
1014                                 "fw_passthru data_buf",
1015                                 error);
1016                         goto fw_passthru_err;
1017                 }
1018                 /* Copy the payload. */
1019                 if ((error = copyin((TW_VOID *)(user_buf->pdata),
1020                         req->data,
1021                         user_buf->driver_pkt.buffer_length)) != 0) {
1022                         tw_osli_printf(sc, "error = %d",
1023                                 TW_CL_SEVERITY_ERROR_STRING,
1024                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1025                                 0x2017,
1026                                 "Could not copyin fw_passthru data_buf",
1027                                 error);
1028                         goto fw_passthru_err;
1029                 }
1030                 pt_req->sgl_entries = 1; /* will be updated during mapping */
1031                 req->flags |= (TW_OSLI_REQ_FLAGS_DATA_IN |
1032                         TW_OSLI_REQ_FLAGS_DATA_OUT);
1033         } else
1034                 pt_req->sgl_entries = 0; /* no payload */
1035
1036         pt_req->cmd_pkt = (TW_VOID *)(&(user_buf->cmd_pkt));
1037         pt_req->cmd_pkt_length = sizeof(struct tw_cl_command_packet);
1038
1039         if ((error = tw_osli_map_request(req)))
1040                 goto fw_passthru_err;
1041
1042         end_time = tw_osl_get_local_time() + timeout;
1043         while (req->state != TW_OSLI_REQ_STATE_COMPLETE) {
1044                 mtx_lock(req->ioctl_wake_timeout_lock);
1045                 req->flags |= TW_OSLI_REQ_FLAGS_SLEEPING;
1046
1047                 error = mtx_sleep(req, req->ioctl_wake_timeout_lock, 0,
1048                             "twa_passthru", timeout*hz);
1049                 mtx_unlock(req->ioctl_wake_timeout_lock);
1050
1051                 if (!(req->flags & TW_OSLI_REQ_FLAGS_SLEEPING))
1052                         error = 0;
1053                 req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
1054
1055                 if (! error) {
1056                         if (((error = req->error_code)) ||
1057                                 ((error = (req->state !=
1058                                 TW_OSLI_REQ_STATE_COMPLETE))) ||
1059                                 ((error = req_pkt->status)))
1060                                 goto fw_passthru_err;
1061                         break;
1062                 }
1063
1064                 if (req_pkt->status) {
1065                         error = req_pkt->status;
1066                         goto fw_passthru_err;
1067                 }
1068
1069                 if (error == EWOULDBLOCK) {
1070                         /* Time out! */
1071                         if ((!(req->error_code))                       &&
1072                             (req->state == TW_OSLI_REQ_STATE_COMPLETE) &&
1073                             (!(req_pkt->status))                          ) {
1074 #ifdef    TW_OSL_DEBUG
1075                                 tw_osli_printf(sc, "request = %p",
1076                                         TW_CL_SEVERITY_ERROR_STRING,
1077                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1078                                         0x7777,
1079                                         "FALSE Passthru timeout!",
1080                                         req);
1081 #endif /* TW_OSL_DEBUG */
1082                                 error = 0; /* False error */
1083                                 break;
1084                         }
1085                         if (!(tw_cl_is_reset_needed(&(req->ctlr->ctlr_handle)))) {
1086 #ifdef    TW_OSL_DEBUG
1087                                 tw_osli_printf(sc, "request = %p",
1088                                         TW_CL_SEVERITY_ERROR_STRING,
1089                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1090                                         0x2018,
1091                                         "Passthru request timed out!",
1092                                         req);
1093 #else  /* TW_OSL_DEBUG */
1094                         device_printf((sc)->bus_dev, "Passthru request timed out!\n");
1095 #endif /* TW_OSL_DEBUG */
1096                                 tw_cl_reset_ctlr(&(req->ctlr->ctlr_handle));
1097                         }
1098
1099                         error = 0;
1100                         end_time = tw_osl_get_local_time() + timeout;
1101                         continue;
1102                         /*
1103                          * Don't touch req after a reset.  It (and any
1104                          * associated data) will be
1105                          * unmapped by the callback.
1106                          */
1107                 }
1108                 /*
1109                  * Either the request got completed, or we were woken up by a
1110                  * signal.  Calculate the new timeout, in case it was the latter.
1111                  */
1112                 timeout = (end_time - tw_osl_get_local_time());
1113         } /* End of while loop */
1114
1115         /* If there was a payload, copy it back. */
1116         if ((!error) && (req->length))
1117                 if ((error = copyout(req->data, user_buf->pdata,
1118                         user_buf->driver_pkt.buffer_length)))
1119                         tw_osli_printf(sc, "error = %d",
1120                                 TW_CL_SEVERITY_ERROR_STRING,
1121                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1122                                 0x2019,
1123                                 "Could not copyout fw_passthru data_buf",
1124                                 error);
1125
1126 fw_passthru_err:
1127
1128         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1129                 error = EBUSY;
1130
1131         user_buf->driver_pkt.os_status = error;
1132         /* Free resources. */
1133         if (req->data)
1134                 free(req->data, TW_OSLI_MALLOC_CLASS);
1135         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1136         return(error);
1137 }
1138
1139
1140
1141 /*
1142  * Function name:       tw_osl_complete_passthru
1143  * Description:         Called to complete passthru requests.
1144  *
1145  * Input:               req_handle      -- ptr to request handle
1146  * Output:              None
1147  * Return value:        None
1148  */
1149 TW_VOID
1150 tw_osl_complete_passthru(struct tw_cl_req_handle *req_handle)
1151 {
1152         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
1153         struct tw_cl_req_packet         *req_pkt =
1154                 (struct tw_cl_req_packet *)(&req->req_pkt);
1155         struct twa_softc                *sc = req->ctlr;
1156
1157         tw_osli_dbg_dprintf(5, sc, "entered");
1158
1159         if (req->state != TW_OSLI_REQ_STATE_BUSY) {
1160                 tw_osli_printf(sc, "request = %p, status = %d",
1161                         TW_CL_SEVERITY_ERROR_STRING,
1162                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1163                         0x201B,
1164                         "Unposted command completed!!",
1165                         req, req->state);
1166         }
1167
1168         /*
1169          * Remove request from the busy queue.  Just mark it complete.
1170          * There's no need to move it into the complete queue as we are
1171          * going to be done with it right now.
1172          */
1173         req->state = TW_OSLI_REQ_STATE_COMPLETE;
1174         tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q);
1175
1176         tw_osli_unmap_request(req);
1177
1178         /*
1179          * Don't do a wake up if there was an error even before the request
1180          * was sent down to the Common Layer, and we hadn't gotten an
1181          * EINPROGRESS.  The request originator will then be returned an
1182          * error, and he can do the clean-up.
1183          */
1184         if ((req->error_code) && (!(req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)))
1185                 return;
1186
1187         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1188                 if (req->flags & TW_OSLI_REQ_FLAGS_SLEEPING) {
1189                         /* Wake up the sleeping command originator. */
1190                         tw_osli_dbg_dprintf(5, sc,
1191                                 "Waking up originator of request %p", req);
1192                         req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
1193                         wakeup_one(req);
1194                 } else {
1195                         /*
1196                          * If the request completed even before mtx_sleep
1197                          * was called, simply return.
1198                          */
1199                         if (req->flags & TW_OSLI_REQ_FLAGS_MAPPED)
1200                                 return;
1201
1202                         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1203                                 return;
1204
1205                         tw_osli_printf(sc, "request = %p",
1206                                 TW_CL_SEVERITY_ERROR_STRING,
1207                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1208                                 0x201C,
1209                                 "Passthru callback called, "
1210                                 "and caller not sleeping",
1211                                 req);
1212                 }
1213         } else {
1214                 tw_osli_printf(sc, "request = %p",
1215                         TW_CL_SEVERITY_ERROR_STRING,
1216                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1217                         0x201D,
1218                         "Passthru callback called for non-passthru request",
1219                         req);
1220         }
1221 }
1222
1223
1224
1225 /*
1226  * Function name:       tw_osli_get_request
1227  * Description:         Gets a request pkt from the free queue.
1228  *
1229  * Input:               sc      -- ptr to OSL internal ctlr context
1230  * Output:              None
1231  * Return value:        ptr to request pkt      -- success
1232  *                      NULL                    -- failure
1233  */
1234 struct tw_osli_req_context *
1235 tw_osli_get_request(struct twa_softc *sc)
1236 {
1237         struct tw_osli_req_context      *req;
1238
1239         tw_osli_dbg_dprintf(4, sc, "entered");
1240
1241         /* Get a free request packet. */
1242         req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q);
1243
1244         /* Initialize some fields to their defaults. */
1245         if (req) {
1246                 req->req_handle.osl_req_ctxt = NULL;
1247                 req->req_handle.cl_req_ctxt = NULL;
1248                 req->req_handle.is_io = 0;
1249                 req->data = NULL;
1250                 req->length = 0;
1251                 req->deadline = 0;
1252                 req->real_data = NULL;
1253                 req->real_length = 0;
1254                 req->state = TW_OSLI_REQ_STATE_INIT;/* req being initialized */
1255                 req->flags = 0;
1256                 req->error_code = 0;
1257                 req->orig_req = NULL;
1258
1259                 bzero(&(req->req_pkt), sizeof(struct tw_cl_req_packet));
1260
1261         }
1262         return(req);
1263 }
1264
1265
1266
1267 /*
1268  * Function name:       twa_map_load_data_callback
1269  * Description:         Callback of bus_dmamap_load for the buffer associated
1270  *                      with data.  Updates the cmd pkt (size/sgl_entries
1271  *                      fields, as applicable) to reflect the number of sg
1272  *                      elements.
1273  *
1274  * Input:               arg     -- ptr to OSL internal request context
1275  *                      segs    -- ptr to a list of segment descriptors
1276  *                      nsegments--# of segments
1277  *                      error   -- 0 if no errors encountered before callback,
1278  *                                 non-zero if errors were encountered
1279  * Output:              None
1280  * Return value:        None
1281  */
1282 static TW_VOID
1283 twa_map_load_data_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1284         TW_INT32 nsegments, TW_INT32 error)
1285 {
1286         struct tw_osli_req_context      *req =
1287                 (struct tw_osli_req_context *)arg;
1288         struct twa_softc                *sc = req->ctlr;
1289         struct tw_cl_req_packet         *req_pkt = &(req->req_pkt);
1290
1291         tw_osli_dbg_dprintf(10, sc, "entered");
1292
1293         if (error == EINVAL) {
1294                 req->error_code = error;
1295                 return;
1296         }
1297
1298         /* Mark the request as currently being processed. */
1299         req->state = TW_OSLI_REQ_STATE_BUSY;
1300         /* Move the request into the busy queue. */
1301         tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1302
1303         req->flags |= TW_OSLI_REQ_FLAGS_MAPPED;
1304
1305         if (error == EFBIG) {
1306                 req->error_code = error;
1307                 goto out;
1308         }
1309
1310         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1311                 struct tw_cl_passthru_req_packet        *pt_req;
1312
1313                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1314                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1315                                 BUS_DMASYNC_PREREAD);
1316
1317                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1318                         /*
1319                          * If we're using an alignment buffer, and we're
1320                          * writing data, copy the real data out.
1321                          */
1322                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1323                                 bcopy(req->real_data, req->data, req->real_length);
1324                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1325                                 BUS_DMASYNC_PREWRITE);
1326                 }
1327
1328                 pt_req = &(req_pkt->gen_req_pkt.pt_req);
1329                 pt_req->sg_list = (TW_UINT8 *)segs;
1330                 pt_req->sgl_entries += (nsegments - 1);
1331                 error = tw_cl_fw_passthru(&(sc->ctlr_handle), req_pkt,
1332                         &(req->req_handle));
1333         } else {
1334                 struct tw_cl_scsi_req_packet    *scsi_req;
1335
1336                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1337                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1338                                 BUS_DMASYNC_PREREAD);
1339
1340                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1341                         /*
1342                          * If we're using an alignment buffer, and we're
1343                          * writing data, copy the real data out.
1344                          */
1345                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1346                                 bcopy(req->real_data, req->data, req->real_length);
1347                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1348                                 BUS_DMASYNC_PREWRITE);
1349                 }
1350
1351                 scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
1352                 scsi_req->sg_list = (TW_UINT8 *)segs;
1353                 scsi_req->sgl_entries += (nsegments - 1);
1354                 error = tw_cl_start_io(&(sc->ctlr_handle), req_pkt,
1355                         &(req->req_handle));
1356         }
1357
1358 out:
1359         if (error) {
1360                 req->error_code = error;
1361                 req_pkt->tw_osl_callback(&(req->req_handle));
1362                 /*
1363                  * If the caller had been returned EINPROGRESS, and he has
1364                  * registered a callback for handling completion, the callback
1365                  * will never get called because we were unable to submit the
1366                  * request.  So, free up the request right here.
1367                  */
1368                 if (req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)
1369                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1370         }
1371 }
1372
1373
1374
1375 /*
1376  * Function name:       twa_map_load_callback
1377  * Description:         Callback of bus_dmamap_load for the buffer associated
1378  *                      with a cmd pkt.
1379  *
1380  * Input:               arg     -- ptr to variable to hold phys addr
1381  *                      segs    -- ptr to a list of segment descriptors
1382  *                      nsegments--# of segments
1383  *                      error   -- 0 if no errors encountered before callback,
1384  *                                 non-zero if errors were encountered
1385  * Output:              None
1386  * Return value:        None
1387  */
1388 static TW_VOID
1389 twa_map_load_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1390         TW_INT32 nsegments, TW_INT32 error)
1391 {
1392         *((bus_addr_t *)arg) = segs[0].ds_addr;
1393 }
1394
1395
1396
1397 /*
1398  * Function name:       tw_osli_map_request
1399  * Description:         Maps a cmd pkt and data associated with it, into
1400  *                      DMA'able memory.
1401  *
1402  * Input:               req     -- ptr to request pkt
1403  * Output:              None
1404  * Return value:        0       -- success
1405  *                      non-zero-- failure
1406  */
1407 TW_INT32
1408 tw_osli_map_request(struct tw_osli_req_context *req)
1409 {
1410         struct twa_softc        *sc = req->ctlr;
1411         TW_INT32                error = 0;
1412
1413         tw_osli_dbg_dprintf(10, sc, "entered");
1414
1415         /* If the command involves data, map that too. */
1416         if (req->data != NULL) {
1417                 /*
1418                  * It's sufficient for the data pointer to be 4-byte aligned
1419                  * to work with 9000.  However, if 4-byte aligned addresses
1420                  * are passed to bus_dmamap_load, we can get back sg elements
1421                  * that are not 512-byte multiples in size.  So, we will let
1422                  * only those buffers that are 512-byte aligned to pass
1423                  * through, and bounce the rest, so as to make sure that we
1424                  * always get back sg elements that are 512-byte multiples
1425                  * in size.
1426                  */
1427                 if (((vm_offset_t)req->data % sc->sg_size_factor) ||
1428                         (req->length % sc->sg_size_factor)) {
1429                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED;
1430                         /* Save original data pointer and length. */
1431                         req->real_data = req->data;
1432                         req->real_length = req->length;
1433                         req->length = (req->length +
1434                                 (sc->sg_size_factor - 1)) &
1435                                 ~(sc->sg_size_factor - 1);
1436                         req->data = malloc(req->length, TW_OSLI_MALLOC_CLASS,
1437                                         M_NOWAIT);
1438                         if (req->data == NULL) {
1439                                 tw_osli_printf(sc, "error = %d",
1440                                         TW_CL_SEVERITY_ERROR_STRING,
1441                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1442                                         0x201E,
1443                                         "Failed to allocate memory "
1444                                         "for bounce buffer",
1445                                         ENOMEM);
1446                                 /* Restore original data pointer and length. */
1447                                 req->data = req->real_data;
1448                                 req->length = req->real_length;
1449                                 return(ENOMEM);
1450                         }
1451                 }
1452
1453                 /*
1454                  * Map the data buffer into bus space and build the SG list.
1455                  */
1456                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1457                         /* Lock against multiple simultaneous ioctl calls. */
1458                         mtx_lock_spin(sc->io_lock);
1459                         error = bus_dmamap_load(sc->ioctl_tag, sc->ioctl_map,
1460                                 req->data, req->length,
1461                                 twa_map_load_data_callback, req,
1462                                 BUS_DMA_WAITOK);
1463                         mtx_unlock_spin(sc->io_lock);
1464                 } else if (req->flags & TW_OSLI_REQ_FLAGS_CCB) {
1465                         error = bus_dmamap_load_ccb(sc->dma_tag, req->dma_map,
1466                                 req->orig_req, twa_map_load_data_callback, req,
1467                                 BUS_DMA_WAITOK);
1468                 } else {
1469                         /*
1470                          * There's only one CAM I/O thread running at a time.
1471                          * So, there's no need to hold the io_lock.
1472                          */
1473                         error = bus_dmamap_load(sc->dma_tag, req->dma_map,
1474                                 req->data, req->length,
1475                                 twa_map_load_data_callback, req,
1476                                 BUS_DMA_WAITOK);
1477                 }
1478
1479                 if (!error)
1480                         error = req->error_code;
1481                 else {
1482                         if (error == EINPROGRESS) {
1483                                 /*
1484                                  * Specifying sc->io_lock as the lockfuncarg
1485                                  * in ...tag_create should protect the access
1486                                  * of ...FLAGS_MAPPED from the callback.
1487                                  */
1488                                 mtx_lock_spin(sc->io_lock);
1489                                 if (!(req->flags & TW_OSLI_REQ_FLAGS_MAPPED))
1490                                         req->flags |= TW_OSLI_REQ_FLAGS_IN_PROGRESS;
1491                                 tw_osli_disallow_new_requests(sc, &(req->req_handle));
1492                                 mtx_unlock_spin(sc->io_lock);
1493                                 error = 0;
1494                         } else {
1495                                 tw_osli_printf(sc, "error = %d",
1496                                         TW_CL_SEVERITY_ERROR_STRING,
1497                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1498                                         0x9999,
1499                                         "Failed to map DMA memory "
1500                                         "for I/O request",
1501                                         error);
1502                                 req->flags |= TW_OSLI_REQ_FLAGS_FAILED;
1503                                 /* Free alignment buffer if it was used. */
1504                                 if (req->flags &
1505                                         TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1506                                         free(req->data, TW_OSLI_MALLOC_CLASS);
1507                                         /*
1508                                          * Restore original data pointer
1509                                          * and length.
1510                                          */
1511                                         req->data = req->real_data;
1512                                         req->length = req->real_length;
1513                                 }
1514                         }
1515                 }
1516
1517         } else {
1518                 /* Mark the request as currently being processed. */
1519                 req->state = TW_OSLI_REQ_STATE_BUSY;
1520                 /* Move the request into the busy queue. */
1521                 tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1522                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU)
1523                         error = tw_cl_fw_passthru(&sc->ctlr_handle,
1524                                         &(req->req_pkt), &(req->req_handle));
1525                 else
1526                         error = tw_cl_start_io(&sc->ctlr_handle,
1527                                         &(req->req_pkt), &(req->req_handle));
1528                 if (error) {
1529                         req->error_code = error;
1530                         req->req_pkt.tw_osl_callback(&(req->req_handle));
1531                 }
1532         }
1533         return(error);
1534 }
1535
1536
1537
1538 /*
1539  * Function name:       tw_osli_unmap_request
1540  * Description:         Undoes the mapping done by tw_osli_map_request.
1541  *
1542  * Input:               req     -- ptr to request pkt
1543  * Output:              None
1544  * Return value:        None
1545  */
1546 TW_VOID
1547 tw_osli_unmap_request(struct tw_osli_req_context *req)
1548 {
1549         struct twa_softc        *sc = req->ctlr;
1550
1551         tw_osli_dbg_dprintf(10, sc, "entered");
1552
1553         /* If the command involved data, unmap that too. */
1554         if (req->data != NULL) {
1555                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1556                         /* Lock against multiple simultaneous ioctl calls. */
1557                         mtx_lock_spin(sc->io_lock);
1558
1559                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1560                                 bus_dmamap_sync(sc->ioctl_tag,
1561                                         sc->ioctl_map, BUS_DMASYNC_POSTREAD);
1562
1563                                 /*
1564                                  * If we are using a bounce buffer, and we are
1565                                  * reading data, copy the real data in.
1566                                  */
1567                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1568                                         bcopy(req->data, req->real_data,
1569                                                 req->real_length);
1570                         }
1571
1572                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1573                                 bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1574                                         BUS_DMASYNC_POSTWRITE);
1575
1576                         bus_dmamap_unload(sc->ioctl_tag, sc->ioctl_map);
1577
1578                         mtx_unlock_spin(sc->io_lock);
1579                 } else {
1580                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1581                                 bus_dmamap_sync(sc->dma_tag,
1582                                         req->dma_map, BUS_DMASYNC_POSTREAD);
1583
1584                                 /*
1585                                  * If we are using a bounce buffer, and we are
1586                                  * reading data, copy the real data in.
1587                                  */
1588                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1589                                         bcopy(req->data, req->real_data,
1590                                                 req->real_length);
1591                         }
1592                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1593                                 bus_dmamap_sync(sc->dma_tag, req->dma_map,
1594                                         BUS_DMASYNC_POSTWRITE);
1595
1596                         bus_dmamap_unload(sc->dma_tag, req->dma_map);
1597                 }
1598         }
1599
1600         /* Free alignment buffer if it was used. */
1601         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1602                 free(req->data, TW_OSLI_MALLOC_CLASS);
1603                 /* Restore original data pointer and length. */
1604                 req->data = req->real_data;
1605                 req->length = req->real_length;
1606         }
1607 }
1608
1609
1610
1611 #ifdef TW_OSL_DEBUG
1612
1613 TW_VOID twa_report_stats(TW_VOID);
1614 TW_VOID twa_reset_stats(TW_VOID);
1615 TW_VOID tw_osli_print_ctlr_stats(struct twa_softc *sc);
1616 TW_VOID twa_print_req_info(struct tw_osli_req_context *req);
1617
1618
1619 /*
1620  * Function name:       twa_report_stats
1621  * Description:         For being called from ddb.  Calls functions that print
1622  *                      OSL and CL internal stats for the controller.
1623  *
1624  * Input:               None
1625  * Output:              None
1626  * Return value:        None
1627  */
1628 TW_VOID
1629 twa_report_stats(TW_VOID)
1630 {
1631         struct twa_softc        *sc;
1632         TW_INT32                i;
1633
1634         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1635                 tw_osli_print_ctlr_stats(sc);
1636                 tw_cl_print_ctlr_stats(&sc->ctlr_handle);
1637         }
1638 }
1639
1640
1641
1642 /*
1643  * Function name:       tw_osli_print_ctlr_stats
1644  * Description:         For being called from ddb.  Prints OSL controller stats
1645  *
1646  * Input:               sc      -- ptr to OSL internal controller context
1647  * Output:              None
1648  * Return value:        None
1649  */
1650 TW_VOID
1651 tw_osli_print_ctlr_stats(struct twa_softc *sc)
1652 {
1653         twa_printf(sc, "osl_ctlr_ctxt = %p\n", sc);
1654         twa_printf(sc, "OSLq type  current  max\n");
1655         twa_printf(sc, "free      %04d     %04d\n",
1656                 sc->q_stats[TW_OSLI_FREE_Q].cur_len,
1657                 sc->q_stats[TW_OSLI_FREE_Q].max_len);
1658         twa_printf(sc, "busy      %04d     %04d\n",
1659                 sc->q_stats[TW_OSLI_BUSY_Q].cur_len,
1660                 sc->q_stats[TW_OSLI_BUSY_Q].max_len);
1661 }
1662
1663
1664
1665 /*
1666  * Function name:       twa_print_req_info
1667  * Description:         For being called from ddb.  Calls functions that print
1668  *                      OSL and CL internal details for the request.
1669  *
1670  * Input:               req     -- ptr to OSL internal request context
1671  * Output:              None
1672  * Return value:        None
1673  */
1674 TW_VOID
1675 twa_print_req_info(struct tw_osli_req_context *req)
1676 {
1677         struct twa_softc        *sc = req->ctlr;
1678
1679         twa_printf(sc, "OSL details for request:\n");
1680         twa_printf(sc, "osl_req_ctxt = %p, cl_req_ctxt = %p\n"
1681                 "data = %p, length = 0x%x, real_data = %p, real_length = 0x%x\n"
1682                 "state = 0x%x, flags = 0x%x, error = 0x%x, orig_req = %p\n"
1683                 "next_req = %p, prev_req = %p, dma_map = %p\n",
1684                 req->req_handle.osl_req_ctxt, req->req_handle.cl_req_ctxt,
1685                 req->data, req->length, req->real_data, req->real_length,
1686                 req->state, req->flags, req->error_code, req->orig_req,
1687                 req->link.next, req->link.prev, req->dma_map);
1688         tw_cl_print_req_info(&(req->req_handle));
1689 }
1690
1691
1692
1693 /*
1694  * Function name:       twa_reset_stats
1695  * Description:         For being called from ddb.
1696  *                      Resets some OSL controller stats.
1697  *
1698  * Input:               None
1699  * Output:              None
1700  * Return value:        None
1701  */
1702 TW_VOID
1703 twa_reset_stats(TW_VOID)
1704 {
1705         struct twa_softc        *sc;
1706         TW_INT32                i;
1707
1708         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1709                 sc->q_stats[TW_OSLI_FREE_Q].max_len = 0;
1710                 sc->q_stats[TW_OSLI_BUSY_Q].max_len = 0;
1711                 tw_cl_reset_stats(&sc->ctlr_handle);
1712         }
1713 }
1714
1715 #endif /* TW_OSL_DEBUG */