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: head/sys/dev/twa/tw_osl_freebsd.c 254263 2013-08-12 23:30:01Z scottl $
  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 static 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, D_MPSAFE },
  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 static int              twa_msi_enable = 0;
  74 TUNABLE_INT("hw.twa.msi.enable", &twa_msi_enable);
  75
  76
  77 /*
  78  * Function name:       twa_open
  79  * Description:         Called when the controller is opened.
  80  *                      Simply marks the controller as open.
  81  *
  82  * Input:               dev     -- control device corresponding to the ctlr
  83  *                      flags   -- mode of open
  84  *                      fmt     -- device type (character/block etc.)
  85  *                      proc    -- current process
  86  * Output:              None
  87  * Return value:        0       -- success
  88  *                      non-zero-- failure
  89  */
  90 static TW_INT32
  91 twa_open(struct dev_open_args *ap)
  92 {
  93         cdev_t                  dev = ap->a_head.a_dev;
  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 dev_close_args *ap)
 118 {
 119         cdev_t                  dev = ap->a_head.a_dev;
 120         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 121
 122         tw_osli_dbg_dprintf(5, sc, "entered");
 123         sc->open = TW_CL_FALSE;
 124         return(0);
 125 }
 126
 127
 128
 129 /*
 130  * Function name:       twa_ioctl
 131  * Description:         Called when an ioctl is posted to the controller.
 132  *                      Handles any OS Layer specific cmds, passes the rest
 133  *                      on to the Common Layer.
 134  *
 135  * Input:               dev     -- control device corresponding to the ctlr
 136  *                      cmd     -- ioctl cmd
 137  *                      buf     -- ptr to buffer in kernel memory, which is
 138  *                                 a copy of the input buffer in user-space
 139  *                      flags   -- mode of corresponding open
 140  *                      proc    -- current process
 141  * Output:              buf     -- ptr to buffer in kernel memory, which will
 142  *                                 be copied to the output buffer in user-space
 143  * Return value:        0       -- success
 144  *                      non-zero-- failure
 145  */
 146 static TW_INT32
 147 twa_ioctl(struct dev_ioctl_args *ap)
 148 {
 149         cdev_t                  dev = ap->a_head.a_dev;
 150         u_long                  cmd = ap->a_cmd;
 151         caddr_t                 buf = ap->a_data;
 152         struct twa_softc        *sc = (struct twa_softc *)(dev->si_drv1);
 153         TW_INT32                error;
 154
 155         tw_osli_dbg_dprintf(5, sc, "entered");
 156
 157         switch (cmd) {
 158         case TW_OSL_IOCTL_FIRMWARE_PASS_THROUGH:
 159                 tw_osli_dbg_dprintf(6, sc, "ioctl: fw_passthru");
 160                 error = tw_osli_fw_passthru(sc, (TW_INT8 *)buf);
 161                 break;
 162
 163         case TW_OSL_IOCTL_SCAN_BUS:
 164                 /* Request CAM for a bus scan. */
 165                 tw_osli_dbg_dprintf(6, sc, "ioctl: scan bus");
 166                 error = tw_osli_request_bus_scan(sc);
 167                 break;
 168
 169         default:
 170                 tw_osli_dbg_dprintf(6, sc, "ioctl: 0x%lx", cmd);
 171                 error = tw_cl_ioctl(&sc->ctlr_handle, cmd, buf);
 172                 break;
 173         }
 174         return(error);
 175 }
 176
 177
 178
 179 static TW_INT32 twa_probe(device_t dev);
 180 static TW_INT32 twa_attach(device_t dev);
 181 static TW_INT32 twa_detach(device_t dev);
 182 static TW_INT32 twa_shutdown(device_t dev);
 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_END
 205 };
 206
 207 static driver_t twa_pci_driver = {
 208         "twa",
 209         twa_methods,
 210         sizeof(struct twa_softc)
 211 };
 212
 213 DRIVER_MODULE(twa, pci, twa_pci_driver, twa_devclass, NULL, NULL);
 214 MODULE_DEPEND(twa, cam, 1, 1, 1);
 215 MODULE_DEPEND(twa, pci, 1, 1, 1);
 216 MODULE_VERSION(twa, 1);
 217
 218
 219 /*
 220  * Function name:       twa_probe
 221  * Description:         Called at driver load time.  Claims 9000 ctlrs.
 222  *
 223  * Input:               dev     -- bus device corresponding to the ctlr
 224  * Output:              None
 225  * Return value:        <= 0    -- success
 226  *                      > 0     -- failure
 227  */
 228 static TW_INT32
 229 twa_probe(device_t dev)
 230 {
 231         static TW_UINT8 first_ctlr = 1;
 232
 233         tw_osli_dbg_printf(3, "entered");
 234
 235         if (tw_cl_ctlr_supported(pci_get_vendor(dev), pci_get_device(dev))) {
 236                 device_set_desc(dev, TW_OSLI_DEVICE_NAME);
 237                 /* Print the driver version only once. */
 238                 if (first_ctlr) {
 239                         kprintf("3ware device driver for 9000 series storage "
 240                                 "controllers, version: %s\n",
 241                                 TW_OSL_DRIVER_VERSION_STRING);
 242                         first_ctlr = 0;
 243                 }
 244                 return(0);
 245         }
 246         return(ENXIO);
 247 }
 248
 249 int twa_setup_intr(struct twa_softc *sc)
 250 {
 251         int error = 0;
 252
 253         if (!(sc->intr_handle) && (sc->irq_res)) {
 254                 error = bus_setup_intr(sc->bus_dev, sc->irq_res,
 255                                         INTR_MPSAFE,
 256                                         twa_pci_intr,
 257                                         sc, &sc->intr_handle, NULL);
 258         }
 259         return( error );
 260 }
 261
 262
 263 int twa_teardown_intr(struct twa_softc *sc)
 264 {
 265         int error = 0;
 266
 267         if ((sc->intr_handle) && (sc->irq_res)) {
 268                 error = bus_teardown_intr(sc->bus_dev,
 269                                                 sc->irq_res, sc->intr_handle);
 270                 sc->intr_handle = NULL;
 271         }
 272         return( error );
 273 }
 274
 275
 276
 277 /*
 278  * Function name:       twa_attach
 279  * Description:         Allocates pci resources; updates sc; adds a node to the
 280  *                      sysctl tree to expose the driver version; makes calls
 281  *                      (to the Common Layer) to initialize ctlr, and to
 282  *                      attach to CAM.
 283  *
 284  * Input:               dev     -- bus device corresponding to the ctlr
 285  * Output:              None
 286  * Return value:        0       -- success
 287  *                      non-zero-- failure
 288  */
 289 static TW_INT32
 290 twa_attach(device_t dev)
 291 {
 292         struct twa_softc        *sc = device_get_softc(dev);
 293         TW_INT32                bar_num;
 294         TW_INT32                bar0_offset;
 295         TW_INT32                bar_size;
 296         TW_INT32                irq_flags;
 297         TW_INT32                error;
 298
 299         sc->ctlr_handle.osl_ctlr_ctxt = sc;
 300
 301         /* Initialize the softc structure. */
 302         sc->bus_dev = dev;
 303         tw_osli_dbg_dprintf(3, sc, "entered");
 304         sc->device_id = pci_get_device(dev);
 305
 306         /* Initialize the mutexes right here. */
 307         sc->io_lock = &(sc->io_lock_handle);
 308         spin_init(sc->io_lock, "twa_iolock");
 309         sc->q_lock = &(sc->q_lock_handle);
 310         spin_init(sc->q_lock, "twa_qlock");
 311         sc->sim_lock = &(sc->sim_lock_handle);
 312         lockinit(sc->sim_lock, "tw_osl_sim_lock", 0, LK_CANRECURSE);
 313
 314         SYSCTL_ADD_STRING(device_get_sysctl_ctx(dev),
 315                 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
 316                 OID_AUTO, "driver_version", CTLFLAG_RD,
 317                 TW_OSL_DRIVER_VERSION_STRING, 0, "TWA driver version");
 318
 319         /* Force the busmaster enable bit on, in case the BIOS forgot. */
 320         pci_enable_busmaster(dev);
 321
 322         /* Allocate the PCI register window. */
 323         if ((error = tw_cl_get_pci_bar_info(sc->device_id, TW_CL_BAR_TYPE_MEM,
 324                 &bar_num, &bar0_offset, &bar_size))) {
 325                 tw_osli_printf(sc, "error = %d",
 326                         TW_CL_SEVERITY_ERROR_STRING,
 327                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 328                         0x201F,
 329                         "Can't get PCI BAR info",
 330                         error);
 331                 tw_osli_free_resources(sc);
 332                 return(error);
 333         }
 334         sc->reg_res_id = PCIR_BARS + bar0_offset;
 335         if ((sc->reg_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
 336                                 &(sc->reg_res_id), 0, ~0, 1, RF_ACTIVE))
 337                                 == NULL) {
 338                 tw_osli_printf(sc, "error = %d",
 339                         TW_CL_SEVERITY_ERROR_STRING,
 340                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 341                         0x2002,
 342                         "Can't allocate register window",
 343                         ENXIO);
 344                 tw_osli_free_resources(sc);
 345                 return(ENXIO);
 346         }
 347         sc->bus_tag = rman_get_bustag(sc->reg_res);
 348         sc->bus_handle = rman_get_bushandle(sc->reg_res);
 349
 350         /* Allocate and register our interrupt. */
 351         sc->irq_res_id = 0;
 352         sc->irq_type = pci_alloc_1intr(sc->bus_dev, twa_msi_enable,
 353             &sc->irq_res_id, &irq_flags);
 354         if ((sc->irq_res = bus_alloc_resource(sc->bus_dev, SYS_RES_IRQ,
 355                                 &(sc->irq_res_id), 0, ~0, 1,
 356                                 irq_flags)) == NULL) {
 357                 tw_osli_printf(sc, "error = %d",
 358                         TW_CL_SEVERITY_ERROR_STRING,
 359                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 360                         0x2003,
 361                         "Can't allocate interrupt",
 362                         ENXIO);
 363                 tw_osli_free_resources(sc);
 364                 return(ENXIO);
 365         }
 366         if ((error = twa_setup_intr(sc))) {
 367                 tw_osli_printf(sc, "error = %d",
 368                         TW_CL_SEVERITY_ERROR_STRING,
 369                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 370                         0x2004,
 371                         "Can't set up interrupt",
 372                         error);
 373                 tw_osli_free_resources(sc);
 374                 return(error);
 375         }
 376
 377         if ((error = tw_osli_alloc_mem(sc))) {
 378                 tw_osli_printf(sc, "error = %d",
 379                         TW_CL_SEVERITY_ERROR_STRING,
 380                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 381                         0x2005,
 382                         "Memory allocation failure",
 383                         error);
 384                 tw_osli_free_resources(sc);
 385                 return(error);
 386         }
 387
 388         /* Initialize the Common Layer for this controller. */
 389         if ((error = tw_cl_init_ctlr(&sc->ctlr_handle, sc->flags, sc->device_id,
 390                         TW_OSLI_MAX_NUM_REQUESTS, TW_OSLI_MAX_NUM_AENS,
 391                         sc->non_dma_mem, sc->dma_mem,
 392                         sc->dma_mem_phys
 393                         ))) {
 394                 tw_osli_printf(sc, "error = %d",
 395                         TW_CL_SEVERITY_ERROR_STRING,
 396                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 397                         0x2006,
 398                         "Failed to initialize Common Layer/controller",
 399                         error);
 400                 tw_osli_free_resources(sc);
 401                 return(error);
 402         }
 403
 404         /* Create the control device. */
 405         sc->ctrl_dev = make_dev(&twa_ops, device_get_unit(sc->bus_dev),
 406                         UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR,
 407                         "twa%d", device_get_unit(sc->bus_dev));
 408         sc->ctrl_dev->si_drv1 = sc;
 409
 410         if ((error = tw_osli_cam_attach(sc))) {
 411                 tw_osli_free_resources(sc);
 412                 tw_osli_printf(sc, "error = %d",
 413                         TW_CL_SEVERITY_ERROR_STRING,
 414                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 415                         0x2007,
 416                         "Failed to initialize CAM",
 417                         error);
 418                 return(error);
 419         }
 420
 421         sc->watchdog_index = 0;
 422         callout_init_mp(&(sc->watchdog_callout[0]));
 423         callout_init_mp(&(sc->watchdog_callout[1]));
 424         callout_reset(&(sc->watchdog_callout[0]), 5*hz, twa_watchdog, &sc->ctlr_handle);
 425
 426         return(0);
 427 }
 428
 429
 430 static TW_VOID
 431 twa_watchdog(TW_VOID *arg)
 432 {
 433         struct tw_cl_ctlr_handle *ctlr_handle =
 434                 (struct tw_cl_ctlr_handle *)arg;
 435         struct twa_softc                *sc = ctlr_handle->osl_ctlr_ctxt;
 436         int                             i;
 437         int                             i_need_a_reset = 0;
 438         int                             driver_is_active = 0;
 439         TW_UINT64                       current_time;
 440         struct tw_osli_req_context      *my_req;
 441
 442
 443 //==============================================================================
 444         current_time = (TW_UINT64) (tw_osl_get_local_time());
 445
 446         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 447                 my_req = &(sc->req_ctx_buf[i]);
 448
 449                 if ((my_req->state == TW_OSLI_REQ_STATE_BUSY) &&
 450                         (my_req->deadline) &&
 451                         (my_req->deadline < current_time)) {
 452                         tw_cl_set_reset_needed(ctlr_handle);
 453 #ifdef    TW_OSL_DEBUG
 454                         device_printf((sc)->bus_dev, "Request %d timed out! d = %llu, c = %llu\n", i, my_req->deadline, current_time);
 455 #else  /* TW_OSL_DEBUG */
 456                         device_printf((sc)->bus_dev, "Request %d timed out!\n", i);
 457 #endif /* TW_OSL_DEBUG */
 458                         break;
 459                 }
 460         }
 461 //==============================================================================
 462
 463         i_need_a_reset = tw_cl_is_reset_needed(ctlr_handle);
 464
 465         i = (int) ((sc->watchdog_index++) & 1);
 466
 467         driver_is_active = tw_cl_is_active(ctlr_handle);
 468
 469         if (i_need_a_reset) {
 470 #ifdef    TW_OSL_DEBUG
 471                 device_printf((sc)->bus_dev, "Watchdog rescheduled in 70 seconds\n");
 472 #endif /* TW_OSL_DEBUG */
 473                 callout_reset(&(sc->watchdog_callout[i]), 70*hz, twa_watchdog, &sc->ctlr_handle);
 474                 tw_cl_reset_ctlr(ctlr_handle);
 475 #ifdef    TW_OSL_DEBUG
 476                 device_printf((sc)->bus_dev, "Watchdog reset completed!\n");
 477 #endif /* TW_OSL_DEBUG */
 478         } else if (driver_is_active) {
 479                 callout_reset(&(sc->watchdog_callout[i]),  5*hz, twa_watchdog, &sc->ctlr_handle);
 480         }
 481 #ifdef    TW_OSL_DEBUG
 482         if (i_need_a_reset)
 483                 device_printf((sc)->bus_dev, "i_need_a_reset = %d, "
 484                 "driver_is_active = %d\n",
 485                 i_need_a_reset, driver_is_active);
 486 #endif /* TW_OSL_DEBUG */
 487 }
 488
 489
 490 /*
 491  * Function name:       tw_osli_alloc_mem
 492  * Description:         Allocates memory needed both by CL and OSL.
 493  *
 494  * Input:               sc      -- OSL internal controller context
 495  * Output:              None
 496  * Return value:        0       -- success
 497  *                      non-zero-- failure
 498  */
 499 static TW_INT32
 500 tw_osli_alloc_mem(struct twa_softc *sc)
 501 {
 502         struct tw_osli_req_context      *req;
 503         TW_UINT32                       max_sg_elements;
 504         TW_UINT32                       non_dma_mem_size;
 505         TW_UINT32                       dma_mem_size;
 506         TW_INT32                        error;
 507         TW_INT32                        i;
 508
 509         tw_osli_dbg_dprintf(3, sc, "entered");
 510
 511         sc->flags |= (sizeof(bus_addr_t) == 8) ? TW_CL_64BIT_ADDRESSES : 0;
 512         sc->flags |= (sizeof(bus_size_t) == 8) ? TW_CL_64BIT_SG_LENGTH : 0;
 513
 514         max_sg_elements = (sizeof(bus_addr_t) == 8) ?
 515                 TW_CL_MAX_64BIT_SG_ELEMENTS : TW_CL_MAX_32BIT_SG_ELEMENTS;
 516
 517         if ((error = tw_cl_get_mem_requirements(&sc->ctlr_handle, sc->flags,
 518                         sc->device_id, TW_OSLI_MAX_NUM_REQUESTS,  TW_OSLI_MAX_NUM_AENS,
 519                         &(sc->alignment), &(sc->sg_size_factor),
 520                         &non_dma_mem_size, &dma_mem_size
 521                         ))) {
 522                 tw_osli_printf(sc, "error = %d",
 523                         TW_CL_SEVERITY_ERROR_STRING,
 524                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 525                         0x2008,
 526                         "Can't get Common Layer's memory requirements",
 527                         error);
 528                 return(error);
 529         }
 530
 531         sc->non_dma_mem = kmalloc(non_dma_mem_size, TW_OSLI_MALLOC_CLASS,
 532             M_WAITOK);
 533
 534         /* Create the parent dma tag. */
 535         if (bus_dma_tag_create(NULL,                    /* parent */
 536                                 sc->alignment,          /* alignment */
 537                                 TW_OSLI_DMA_BOUNDARY,   /* boundary */
 538                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 539                                 BUS_SPACE_MAXADDR,      /* highaddr */
 540                                 NULL, NULL,             /* filter, filterarg */
 541                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 542                                 max_sg_elements,        /* nsegments */
 543                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 544                                 0,                      /* flags */
 545                                 &sc->parent_tag         /* tag */)) {
 546                 tw_osli_printf(sc, "error = %d",
 547                         TW_CL_SEVERITY_ERROR_STRING,
 548                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 549                         0x200A,
 550                         "Can't allocate parent DMA tag",
 551                         ENOMEM);
 552                 return(ENOMEM);
 553         }
 554
 555         /* Create a dma tag for Common Layer's DMA'able memory (dma_mem). */
 556         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 557                                 sc->alignment,          /* alignment */
 558                                 0,                      /* boundary */
 559                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 560                                 BUS_SPACE_MAXADDR,      /* highaddr */
 561                                 NULL, NULL,             /* filter, filterarg */
 562                                 dma_mem_size,           /* maxsize */
 563                                 1,                      /* nsegments */
 564                                 BUS_SPACE_MAXSIZE,      /* maxsegsize */
 565                                 0,                      /* flags */
 566                                 &sc->cmd_tag            /* tag */)) {
 567                 tw_osli_printf(sc, "error = %d",
 568                         TW_CL_SEVERITY_ERROR_STRING,
 569                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 570                         0x200B,
 571                         "Can't allocate DMA tag for Common Layer's "
 572                         "DMA'able memory",
 573                         ENOMEM);
 574                 return(ENOMEM);
 575         }
 576
 577         if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 578                 BUS_DMA_NOWAIT, &sc->cmd_map)) {
 579                 /* Try a second time. */
 580                 if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
 581                         BUS_DMA_NOWAIT, &sc->cmd_map)) {
 582                         tw_osli_printf(sc, "error = %d",
 583                                 TW_CL_SEVERITY_ERROR_STRING,
 584                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 585                                 0x200C,
 586                                 "Can't allocate DMA'able memory for the"
 587                                 "Common Layer",
 588                                 ENOMEM);
 589                         return(ENOMEM);
 590                 }
 591         }
 592
 593         bus_dmamap_load(sc->cmd_tag, sc->cmd_map, sc->dma_mem,
 594                 dma_mem_size, twa_map_load_callback,
 595                 &sc->dma_mem_phys, 0);
 596
 597         /*
 598          * Create a dma tag for data buffers; size will be the maximum
 599          * possible I/O size (128kB).
 600          */
 601         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 602                                 sc->alignment,          /* alignment */
 603                                 0,                      /* boundary */
 604                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 605                                 BUS_SPACE_MAXADDR,      /* highaddr */
 606                                 NULL, NULL,             /* filter, filterarg */
 607                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 608                                 max_sg_elements,        /* nsegments */
 609                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 610                                 BUS_DMA_ALLOCNOW,       /* flags */
 611                                 &sc->dma_tag            /* tag */)) {
 612                 tw_osli_printf(sc, "error = %d",
 613                         TW_CL_SEVERITY_ERROR_STRING,
 614                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 615                         0x200F,
 616                         "Can't allocate DMA tag for data buffers",
 617                         ENOMEM);
 618                 return(ENOMEM);
 619         }
 620
 621         /*
 622          * Create a dma tag for ioctl data buffers; size will be the maximum
 623          * possible I/O size (128kB).
 624          */
 625         if (bus_dma_tag_create(sc->parent_tag,          /* parent */
 626                                 sc->alignment,          /* alignment */
 627                                 0,                      /* boundary */
 628                                 BUS_SPACE_MAXADDR,      /* lowaddr */
 629                                 BUS_SPACE_MAXADDR,      /* highaddr */
 630                                 NULL, NULL,             /* filter, filterarg */
 631                                 TW_CL_MAX_IO_SIZE,      /* maxsize */
 632                                 max_sg_elements,        /* nsegments */
 633                                 TW_CL_MAX_IO_SIZE,      /* maxsegsize */
 634                                 BUS_DMA_ALLOCNOW,       /* flags */
 635                                 &sc->ioctl_tag          /* tag */)) {
 636                 tw_osli_printf(sc, "error = %d",
 637                         TW_CL_SEVERITY_ERROR_STRING,
 638                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 639                         0x2010,
 640                         "Can't allocate DMA tag for ioctl data buffers",
 641                         ENOMEM);
 642                 return(ENOMEM);
 643         }
 644
 645         /* Create just one map for all ioctl request data buffers. */
 646         if (bus_dmamap_create(sc->ioctl_tag, 0, &sc->ioctl_map)) {
 647                 tw_osli_printf(sc, "error = %d",
 648                         TW_CL_SEVERITY_ERROR_STRING,
 649                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 650                         0x2011,
 651                         "Can't create ioctl map",
 652                         ENOMEM);
 653                 return(ENOMEM);
 654         }
 655
 656
 657         /* Initialize request queues. */
 658         tw_osli_req_q_init(sc, TW_OSLI_FREE_Q);
 659         tw_osli_req_q_init(sc, TW_OSLI_BUSY_Q);
 660
 661         sc->req_ctx_buf = kmalloc((sizeof(struct tw_osli_req_context) *
 662             TW_OSLI_MAX_NUM_REQUESTS), TW_OSLI_MALLOC_CLASS,
 663             M_WAITOK | M_ZERO);
 664         for (i = 0; i < TW_OSLI_MAX_NUM_REQUESTS; i++) {
 665                 req = &(sc->req_ctx_buf[i]);
 666                 req->ctlr = sc;
 667                 if (bus_dmamap_create(sc->dma_tag, 0, &req->dma_map)) {
 668                         tw_osli_printf(sc, "request # = %d, error = %d",
 669                                 TW_CL_SEVERITY_ERROR_STRING,
 670                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 671                                 0x2013,
 672                                 "Can't create dma map",
 673                                 i, ENOMEM);
 674                         return(ENOMEM);
 675                 }
 676
 677                 /* Initialize the ioctl wakeup/ timeout mutex */
 678                 req->ioctl_wake_timeout_lock = &(req->ioctl_wake_timeout_lock_handle);
 679                 lockinit(req->ioctl_wake_timeout_lock, "tw_ioctl_wake_timeout_lock", 0, 0);
 680
 681                 /* Insert request into the free queue. */
 682                 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 683         }
 684
 685         return(0);
 686 }
 687
 688
 689
 690 /*
 691  * Function name:       tw_osli_free_resources
 692  * Description:         Performs clean-up at the time of going down.
 693  *
 694  * Input:               sc      -- ptr to OSL internal ctlr context
 695  * Output:              None
 696  * Return value:        None
 697  */
 698 static TW_VOID
 699 tw_osli_free_resources(struct twa_softc *sc)
 700 {
 701         struct tw_osli_req_context      *req;
 702         TW_INT32                        error = 0;
 703
 704         tw_osli_dbg_dprintf(3, sc, "entered");
 705
 706         /* Detach from CAM */
 707         tw_osli_cam_detach(sc);
 708
 709         if (sc->req_ctx_buf)
 710                 while ((req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q)) !=
 711                         NULL) {
 712                         lockuninit(req->ioctl_wake_timeout_lock);
 713
 714                         if ((error = bus_dmamap_destroy(sc->dma_tag,
 715                                         req->dma_map)))
 716                                 tw_osli_dbg_dprintf(1, sc,
 717                                         "dmamap_destroy(dma) returned %d",
 718                                         error);
 719                 }
 720
 721         if ((sc->ioctl_tag) && (sc->ioctl_map))
 722                 if ((error = bus_dmamap_destroy(sc->ioctl_tag, sc->ioctl_map)))
 723                         tw_osli_dbg_dprintf(1, sc,
 724                                 "dmamap_destroy(ioctl) returned %d", error);
 725
 726         /* Free all memory allocated so far. */
 727         if (sc->req_ctx_buf)
 728                 kfree(sc->req_ctx_buf, TW_OSLI_MALLOC_CLASS);
 729
 730         if (sc->non_dma_mem)
 731                 kfree(sc->non_dma_mem, TW_OSLI_MALLOC_CLASS);
 732
 733         if (sc->dma_mem) {
 734                 bus_dmamap_unload(sc->cmd_tag, sc->cmd_map);
 735                 bus_dmamem_free(sc->cmd_tag, sc->dma_mem,
 736                         sc->cmd_map);
 737         }
 738         if (sc->cmd_tag)
 739                 if ((error = bus_dma_tag_destroy(sc->cmd_tag)))
 740                         tw_osli_dbg_dprintf(1, sc,
 741                                 "dma_tag_destroy(cmd) returned %d", error);
 742
 743         if (sc->dma_tag)
 744                 if ((error = bus_dma_tag_destroy(sc->dma_tag)))
 745                         tw_osli_dbg_dprintf(1, sc,
 746                                 "dma_tag_destroy(dma) returned %d", error);
 747
 748         if (sc->ioctl_tag)
 749                 if ((error = bus_dma_tag_destroy(sc->ioctl_tag)))
 750                         tw_osli_dbg_dprintf(1, sc,
 751                                 "dma_tag_destroy(ioctl) returned %d", error);
 752
 753         if (sc->parent_tag)
 754                 if ((error = bus_dma_tag_destroy(sc->parent_tag)))
 755                         tw_osli_dbg_dprintf(1, sc,
 756                                 "dma_tag_destroy(parent) returned %d", error);
 757
 758
 759         /* Disconnect the interrupt handler. */
 760         if ((error = twa_teardown_intr(sc)))
 761                         tw_osli_dbg_dprintf(1, sc,
 762                                 "teardown_intr returned %d", error);
 763
 764         if (sc->irq_res != NULL)
 765                 if ((error = bus_release_resource(sc->bus_dev,
 766                                 SYS_RES_IRQ, sc->irq_res_id, sc->irq_res)))
 767                         tw_osli_dbg_dprintf(1, sc,
 768                                 "release_resource(irq) returned %d", error);
 769
 770         if (sc->irq_type == PCI_INTR_TYPE_MSI)
 771                 pci_release_msi(sc->bus_dev);
 772
 773         /* Release the register window mapping. */
 774         if (sc->reg_res != NULL)
 775                 if ((error = bus_release_resource(sc->bus_dev,
 776                                 SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res)))
 777                         tw_osli_dbg_dprintf(1, sc,
 778                                 "release_resource(io) returned %d", error);
 779
 780         /* Destroy the control device. */
 781         if (sc->ctrl_dev != NULL)
 782                 destroy_dev(sc->ctrl_dev);
 783         dev_ops_remove_minor(&twa_ops, device_get_unit(sc->bus_dev));
 784 }
 785
 786
 787
 788 /*
 789  * Function name:       twa_detach
 790  * Description:         Called when the controller is being detached from
 791  *                      the pci bus.
 792  *
 793  * Input:               dev     -- bus device corresponding to the ctlr
 794  * Output:              None
 795  * Return value:        0       -- success
 796  *                      non-zero-- failure
 797  */
 798 static TW_INT32
 799 twa_detach(device_t dev)
 800 {
 801         struct twa_softc        *sc = device_get_softc(dev);
 802         TW_INT32                error;
 803
 804         tw_osli_dbg_dprintf(3, sc, "entered");
 805
 806         error = EBUSY;
 807         if (sc->open) {
 808                 tw_osli_printf(sc, "error = %d",
 809                         TW_CL_SEVERITY_ERROR_STRING,
 810                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 811                         0x2014,
 812                         "Device open",
 813                         error);
 814                 goto out;
 815         }
 816
 817         /* Shut the controller down. */
 818         if ((error = twa_shutdown(dev)))
 819                 goto out;
 820
 821         /* Free all resources associated with this controller. */
 822         tw_osli_free_resources(sc);
 823         error = 0;
 824
 825 out:
 826         return(error);
 827 }
 828
 829
 830
 831 /*
 832  * Function name:       twa_shutdown
 833  * Description:         Called at unload/shutdown time.  Lets the controller
 834  *                      know that we are going down.
 835  *
 836  * Input:               dev     -- bus device corresponding to the ctlr
 837  * Output:              None
 838  * Return value:        0       -- success
 839  *                      non-zero-- failure
 840  */
 841 static TW_INT32
 842 twa_shutdown(device_t dev)
 843 {
 844         struct twa_softc        *sc = device_get_softc(dev);
 845         TW_INT32                error = 0;
 846
 847         tw_osli_dbg_dprintf(3, sc, "entered");
 848
 849         /* Disconnect interrupts. */
 850         error = twa_teardown_intr(sc);
 851
 852         /* Stop watchdog task. */
 853         callout_stop_sync(&(sc->watchdog_callout[0]));
 854         callout_stop_sync(&(sc->watchdog_callout[1]));
 855
 856         /* Disconnect from the controller. */
 857         if ((error = tw_cl_shutdown_ctlr(&(sc->ctlr_handle), 0))) {
 858                 tw_osli_printf(sc, "error = %d",
 859                         TW_CL_SEVERITY_ERROR_STRING,
 860                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 861                         0x2015,
 862                         "Failed to shutdown Common Layer/controller",
 863                         error);
 864         }
 865         return(error);
 866 }
 867
 868
 869
 870 /*
 871  * Function name:       twa_pci_intr
 872  * Description:         Interrupt handler.  Wrapper for twa_interrupt.
 873  *
 874  * Input:               arg     -- ptr to OSL internal ctlr context
 875  * Output:              None
 876  * Return value:        None
 877  */
 878 static TW_VOID
 879 twa_pci_intr(TW_VOID *arg)
 880 {
 881         struct twa_softc        *sc = (struct twa_softc *)arg;
 882
 883         tw_osli_dbg_dprintf(10, sc, "entered");
 884         tw_cl_interrupt(&(sc->ctlr_handle));
 885 }
 886
 887
 888 /*
 889  * Function name:       tw_osli_fw_passthru
 890  * Description:         Builds a fw passthru cmd pkt, and submits it to CL.
 891  *
 892  * Input:               sc      -- ptr to OSL internal ctlr context
 893  *                      buf     -- ptr to ioctl pkt understood by CL
 894  * Output:              None
 895  * Return value:        0       -- success
 896  *                      non-zero-- failure
 897  */
 898 TW_INT32
 899 tw_osli_fw_passthru(struct twa_softc *sc, TW_INT8 *buf)
 900 {
 901         struct tw_osli_req_context              *req;
 902         struct tw_osli_ioctl_no_data_buf        *user_buf =
 903                 (struct tw_osli_ioctl_no_data_buf *)buf;
 904         TW_TIME                                 end_time;
 905         TW_UINT32                               timeout = 60;
 906         TW_UINT32                               data_buf_size_adjusted;
 907         struct tw_cl_req_packet                 *req_pkt;
 908         struct tw_cl_passthru_req_packet        *pt_req;
 909         TW_INT32                                error;
 910
 911         tw_osli_dbg_dprintf(5, sc, "ioctl: passthru");
 912
 913         if ((req = tw_osli_get_request(sc)) == NULL)
 914                 return(EBUSY);
 915
 916         req->req_handle.osl_req_ctxt = req;
 917         req->orig_req = buf;
 918         req->flags |= TW_OSLI_REQ_FLAGS_PASSTHRU;
 919
 920         req_pkt = &(req->req_pkt);
 921         req_pkt->status = 0;
 922         req_pkt->tw_osl_callback = tw_osl_complete_passthru;
 923         /* Let the Common Layer retry the request on cmd queue full. */
 924         req_pkt->flags |= TW_CL_REQ_RETRY_ON_BUSY;
 925
 926         pt_req = &(req_pkt->gen_req_pkt.pt_req);
 927         /*
 928          * Make sure that the data buffer sent to firmware is a
 929          * 512 byte multiple in size.
 930          */
 931         data_buf_size_adjusted =
 932                 (user_buf->driver_pkt.buffer_length +
 933                 (sc->sg_size_factor - 1)) & ~(sc->sg_size_factor - 1);
 934         if ((req->length = data_buf_size_adjusted)) {
 935                 req->data = kmalloc(data_buf_size_adjusted,
 936                     TW_OSLI_MALLOC_CLASS, M_WAITOK);
 937                 /* Copy the payload. */
 938                 if ((error = copyin((TW_VOID *)(user_buf->pdata),
 939                         req->data,
 940                         user_buf->driver_pkt.buffer_length)) != 0) {
 941                         tw_osli_printf(sc, "error = %d",
 942                                 TW_CL_SEVERITY_ERROR_STRING,
 943                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 944                                 0x2017,
 945                                 "Could not copyin fw_passthru data_buf",
 946                                 error);
 947                         goto fw_passthru_err;
 948                 }
 949                 pt_req->sgl_entries = 1; /* will be updated during mapping */
 950                 req->flags |= (TW_OSLI_REQ_FLAGS_DATA_IN |
 951                         TW_OSLI_REQ_FLAGS_DATA_OUT);
 952         } else
 953                 pt_req->sgl_entries = 0; /* no payload */
 954
 955         pt_req->cmd_pkt = (TW_VOID *)(&(user_buf->cmd_pkt));
 956         pt_req->cmd_pkt_length = sizeof(struct tw_cl_command_packet);
 957
 958         if ((error = tw_osli_map_request(req)))
 959                 goto fw_passthru_err;
 960
 961         end_time = tw_osl_get_local_time() + timeout;
 962         while (req->state != TW_OSLI_REQ_STATE_COMPLETE) {
 963                 lockmgr(req->ioctl_wake_timeout_lock, LK_EXCLUSIVE);
 964                 req->flags |= TW_OSLI_REQ_FLAGS_SLEEPING;
 965
 966                 error = lksleep(req, req->ioctl_wake_timeout_lock, 0,
 967                             "twa_passthru", timeout*hz);
 968                 lockmgr(req->ioctl_wake_timeout_lock, LK_RELEASE);
 969
 970                 if (!(req->flags & TW_OSLI_REQ_FLAGS_SLEEPING))
 971                         error = 0;
 972                 req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
 973
 974                 if (! error) {
 975                         if (((error = req->error_code)) ||
 976                                 ((error = (req->state !=
 977                                 TW_OSLI_REQ_STATE_COMPLETE))) ||
 978                                 ((error = req_pkt->status)))
 979                                 goto fw_passthru_err;
 980                         break;
 981                 }
 982
 983                 if (req_pkt->status) {
 984                         error = req_pkt->status;
 985                         goto fw_passthru_err;
 986                 }
 987
 988                 if (error == EWOULDBLOCK) {
 989                         /* Time out! */
 990                         if ((!(req->error_code))                       &&
 991                             (req->state == TW_OSLI_REQ_STATE_COMPLETE) &&
 992                             (!(req_pkt->status))                          ) {
 993 #ifdef    TW_OSL_DEBUG
 994                                 tw_osli_printf(sc, "request = %p",
 995                                         TW_CL_SEVERITY_ERROR_STRING,
 996                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 997                                         0x7777,
 998                                         "FALSE Passthru timeout!",
 999                                         req);
1000 #endif /* TW_OSL_DEBUG */
1001                                 error = 0; /* False error */
1002                                 break;
1003                         }
1004                         if (!(tw_cl_is_reset_needed(&(req->ctlr->ctlr_handle)))) {
1005 #ifdef    TW_OSL_DEBUG
1006                                 tw_osli_printf(sc, "request = %p",
1007                                         TW_CL_SEVERITY_ERROR_STRING,
1008                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1009                                         0x2018,
1010                                         "Passthru request timed out!",
1011                                         req);
1012 #else  /* TW_OSL_DEBUG */
1013                         device_printf((sc)->bus_dev, "Passthru request timed out!\n");
1014 #endif /* TW_OSL_DEBUG */
1015                                 tw_cl_reset_ctlr(&(req->ctlr->ctlr_handle));
1016                         }
1017
1018                         error = 0;
1019                         end_time = tw_osl_get_local_time() + timeout;
1020                         continue;
1021                         /*
1022                          * Don't touch req after a reset.  It (and any
1023                          * associated data) will be
1024                          * unmapped by the callback.
1025                          */
1026                 }
1027                 /*
1028                  * Either the request got completed, or we were woken up by a
1029                  * signal.  Calculate the new timeout, in case it was the latter.
1030                  */
1031                 timeout = (end_time - tw_osl_get_local_time());
1032         } /* End of while loop */
1033
1034         /* If there was a payload, copy it back. */
1035         if ((!error) && (req->length))
1036                 if ((error = copyout(req->data, user_buf->pdata,
1037                         user_buf->driver_pkt.buffer_length)))
1038                         tw_osli_printf(sc, "error = %d",
1039                                 TW_CL_SEVERITY_ERROR_STRING,
1040                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1041                                 0x2019,
1042                                 "Could not copyout fw_passthru data_buf",
1043                                 error);
1044
1045 fw_passthru_err:
1046
1047         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1048                 error = EBUSY;
1049
1050         user_buf->driver_pkt.os_status = error;
1051         /* Free resources. */
1052         if (req->data)
1053                 kfree(req->data, TW_OSLI_MALLOC_CLASS);
1054         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1055         return(error);
1056 }
1057
1058
1059
1060 /*
1061  * Function name:       tw_osl_complete_passthru
1062  * Description:         Called to complete passthru requests.
1063  *
1064  * Input:               req_handle      -- ptr to request handle
1065  * Output:              None
1066  * Return value:        None
1067  */
1068 TW_VOID
1069 tw_osl_complete_passthru(struct tw_cl_req_handle *req_handle)
1070 {
1071         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
1072         struct tw_cl_req_packet         *req_pkt =
1073                 (struct tw_cl_req_packet *)(&req->req_pkt);
1074         struct twa_softc                *sc = req->ctlr;
1075
1076         tw_osli_dbg_dprintf(5, sc, "entered");
1077
1078         if (req->state != TW_OSLI_REQ_STATE_BUSY) {
1079                 tw_osli_printf(sc, "request = %p, status = %d",
1080                         TW_CL_SEVERITY_ERROR_STRING,
1081                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1082                         0x201B,
1083                         "Unposted command completed!!",
1084                         req, req->state);
1085         }
1086
1087         /*
1088          * Remove request from the busy queue.  Just mark it complete.
1089          * There's no need to move it into the complete queue as we are
1090          * going to be done with it right now.
1091          */
1092         req->state = TW_OSLI_REQ_STATE_COMPLETE;
1093         tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q);
1094
1095         tw_osli_unmap_request(req);
1096
1097         /*
1098          * Don't do a wake up if there was an error even before the request
1099          * was sent down to the Common Layer, and we hadn't gotten an
1100          * EINPROGRESS.  The request originator will then be returned an
1101          * error, and he can do the clean-up.
1102          */
1103         if ((req->error_code) && (!(req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)))
1104                 return;
1105
1106         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1107                 if (req->flags & TW_OSLI_REQ_FLAGS_SLEEPING) {
1108                         /* Wake up the sleeping command originator. */
1109                         tw_osli_dbg_dprintf(5, sc,
1110                                 "Waking up originator of request %p", req);
1111                         req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
1112                         wakeup_one(req);
1113                 } else {
1114                         /*
1115                          * If the request completed even before mtx_sleep
1116                          * was called, simply return.
1117                          */
1118                         if (req->flags & TW_OSLI_REQ_FLAGS_MAPPED)
1119                                 return;
1120
1121                         if (req_pkt->status == TW_CL_ERR_REQ_BUS_RESET)
1122                                 return;
1123
1124                         tw_osli_printf(sc, "request = %p",
1125                                 TW_CL_SEVERITY_ERROR_STRING,
1126                                 TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1127                                 0x201C,
1128                                 "Passthru callback called, "
1129                                 "and caller not sleeping",
1130                                 req);
1131                 }
1132         } else {
1133                 tw_osli_printf(sc, "request = %p",
1134                         TW_CL_SEVERITY_ERROR_STRING,
1135                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1136                         0x201D,
1137                         "Passthru callback called for non-passthru request",
1138                         req);
1139         }
1140 }
1141
1142
1143
1144 /*
1145  * Function name:       tw_osli_get_request
1146  * Description:         Gets a request pkt from the free queue.
1147  *
1148  * Input:               sc      -- ptr to OSL internal ctlr context
1149  * Output:              None
1150  * Return value:        ptr to request pkt      -- success
1151  *                      NULL                    -- failure
1152  */
1153 struct tw_osli_req_context *
1154 tw_osli_get_request(struct twa_softc *sc)
1155 {
1156         struct tw_osli_req_context      *req;
1157
1158         tw_osli_dbg_dprintf(4, sc, "entered");
1159
1160         /* Get a free request packet. */
1161         req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q);
1162
1163         /* Initialize some fields to their defaults. */
1164         if (req) {
1165                 req->req_handle.osl_req_ctxt = NULL;
1166                 req->req_handle.cl_req_ctxt = NULL;
1167                 req->req_handle.is_io = 0;
1168                 req->data = NULL;
1169                 req->length = 0;
1170                 req->deadline = 0;
1171                 req->real_data = NULL;
1172                 req->real_length = 0;
1173                 req->state = TW_OSLI_REQ_STATE_INIT;/* req being initialized */
1174                 req->flags = 0;
1175                 req->error_code = 0;
1176                 req->orig_req = NULL;
1177
1178                 bzero(&(req->req_pkt), sizeof(struct tw_cl_req_packet));
1179
1180         }
1181         return(req);
1182 }
1183
1184
1185
1186 /*
1187  * Function name:       twa_map_load_data_callback
1188  * Description:         Callback of bus_dmamap_load for the buffer associated
1189  *                      with data.  Updates the cmd pkt (size/sgl_entries
1190  *                      fields, as applicable) to reflect the number of sg
1191  *                      elements.
1192  *
1193  * Input:               arg     -- ptr to OSL internal request context
1194  *                      segs    -- ptr to a list of segment descriptors
1195  *                      nsegments--# of segments
1196  *                      error   -- 0 if no errors encountered before callback,
1197  *                                 non-zero if errors were encountered
1198  * Output:              None
1199  * Return value:        None
1200  */
1201 static TW_VOID
1202 twa_map_load_data_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1203         TW_INT32 nsegments, TW_INT32 error)
1204 {
1205         struct tw_osli_req_context      *req =
1206                 (struct tw_osli_req_context *)arg;
1207         struct twa_softc                *sc = req->ctlr;
1208         struct tw_cl_req_packet         *req_pkt = &(req->req_pkt);
1209
1210         tw_osli_dbg_dprintf(10, sc, "entered");
1211
1212         if (error == EINVAL) {
1213                 req->error_code = error;
1214                 return;
1215         }
1216
1217         /* Mark the request as currently being processed. */
1218         req->state = TW_OSLI_REQ_STATE_BUSY;
1219         /* Move the request into the busy queue. */
1220         tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1221
1222         req->flags |= TW_OSLI_REQ_FLAGS_MAPPED;
1223
1224         if (error == EFBIG) {
1225                 req->error_code = error;
1226                 goto out;
1227         }
1228
1229         if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1230                 struct tw_cl_passthru_req_packet        *pt_req;
1231
1232                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1233                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1234                                 BUS_DMASYNC_PREREAD);
1235
1236                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1237                         /*
1238                          * If we're using an alignment buffer, and we're
1239                          * writing data, copy the real data out.
1240                          */
1241                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1242                                 bcopy(req->real_data, req->data, req->real_length);
1243                         bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1244                                 BUS_DMASYNC_PREWRITE);
1245                 }
1246
1247                 pt_req = &(req_pkt->gen_req_pkt.pt_req);
1248                 pt_req->sg_list = (TW_UINT8 *)segs;
1249                 pt_req->sgl_entries += (nsegments - 1);
1250                 error = tw_cl_fw_passthru(&(sc->ctlr_handle), req_pkt,
1251                         &(req->req_handle));
1252         } else {
1253                 struct tw_cl_scsi_req_packet    *scsi_req;
1254
1255                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
1256                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1257                                 BUS_DMASYNC_PREREAD);
1258
1259                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
1260                         /*
1261                          * If we're using an alignment buffer, and we're
1262                          * writing data, copy the real data out.
1263                          */
1264                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1265                                 bcopy(req->real_data, req->data, req->real_length);
1266                         bus_dmamap_sync(sc->dma_tag, req->dma_map,
1267                                 BUS_DMASYNC_PREWRITE);
1268                 }
1269
1270                 scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
1271                 scsi_req->sg_list = (TW_UINT8 *)segs;
1272                 scsi_req->sgl_entries += (nsegments - 1);
1273                 error = tw_cl_start_io(&(sc->ctlr_handle), req_pkt,
1274                         &(req->req_handle));
1275         }
1276
1277 out:
1278         if (error) {
1279                 req->error_code = error;
1280                 req_pkt->tw_osl_callback(&(req->req_handle));
1281                 /*
1282                  * If the caller had been returned EINPROGRESS, and he has
1283                  * registered a callback for handling completion, the callback
1284                  * will never get called because we were unable to submit the
1285                  * request.  So, free up the request right here.
1286                  */
1287                 if (req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)
1288                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
1289         }
1290 }
1291
1292
1293
1294 /*
1295  * Function name:       twa_map_load_callback
1296  * Description:         Callback of bus_dmamap_load for the buffer associated
1297  *                      with a cmd pkt.
1298  *
1299  * Input:               arg     -- ptr to variable to hold phys addr
1300  *                      segs    -- ptr to a list of segment descriptors
1301  *                      nsegments--# of segments
1302  *                      error   -- 0 if no errors encountered before callback,
1303  *                                 non-zero if errors were encountered
1304  * Output:              None
1305  * Return value:        None
1306  */
1307 static TW_VOID
1308 twa_map_load_callback(TW_VOID *arg, bus_dma_segment_t *segs,
1309         TW_INT32 nsegments, TW_INT32 error)
1310 {
1311         *((bus_addr_t *)arg) = segs[0].ds_addr;
1312 }
1313
1314
1315
1316 /*
1317  * Function name:       tw_osli_map_request
1318  * Description:         Maps a cmd pkt and data associated with it, into
1319  *                      DMA'able memory.
1320  *
1321  * Input:               req     -- ptr to request pkt
1322  * Output:              None
1323  * Return value:        0       -- success
1324  *                      non-zero-- failure
1325  */
1326 TW_INT32
1327 tw_osli_map_request(struct tw_osli_req_context *req)
1328 {
1329         struct twa_softc        *sc = req->ctlr;
1330         TW_INT32                error = 0;
1331
1332         tw_osli_dbg_dprintf(10, sc, "entered");
1333
1334         /* If the command involves data, map that too. */
1335         if (req->data != NULL) {
1336                 /*
1337                  * It's sufficient for the data pointer to be 4-byte aligned
1338                  * to work with 9000.  However, if 4-byte aligned addresses
1339                  * are passed to bus_dmamap_load, we can get back sg elements
1340                  * that are not 512-byte multiples in size.  So, we will let
1341                  * only those buffers that are 512-byte aligned to pass
1342                  * through, and bounce the rest, so as to make sure that we
1343                  * always get back sg elements that are 512-byte multiples
1344                  * in size.
1345                  */
1346                 if (((vm_offset_t)req->data % sc->sg_size_factor) ||
1347                         (req->length % sc->sg_size_factor)) {
1348                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED;
1349                         /* Save original data pointer and length. */
1350                         req->real_data = req->data;
1351                         req->real_length = req->length;
1352                         req->length = (req->length +
1353                                 (sc->sg_size_factor - 1)) &
1354                                 ~(sc->sg_size_factor - 1);
1355                         req->data = kmalloc(req->length, TW_OSLI_MALLOC_CLASS,
1356                                         M_NOWAIT);
1357                         if (req->data == NULL) {
1358                                 tw_osli_printf(sc, "error = %d",
1359                                         TW_CL_SEVERITY_ERROR_STRING,
1360                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1361                                         0x201E,
1362                                         "Failed to allocate memory "
1363                                         "for bounce buffer",
1364                                         ENOMEM);
1365                                 /* Restore original data pointer and length. */
1366                                 req->data = req->real_data;
1367                                 req->length = req->real_length;
1368                                 return(ENOMEM);
1369                         }
1370                 }
1371
1372                 /*
1373                  * Map the data buffer into bus space and build the SG list.
1374                  */
1375                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1376                         /* Lock against multiple simultaneous ioctl calls. */
1377                         spin_lock(sc->io_lock);
1378                         error = bus_dmamap_load(sc->ioctl_tag, sc->ioctl_map,
1379                                 req->data, req->length,
1380                                 twa_map_load_data_callback, req,
1381                                 BUS_DMA_WAITOK);
1382                         spin_unlock(sc->io_lock);
1383                 } else {
1384                         /*
1385                          * There's only one CAM I/O thread running at a time.
1386                          * So, there's no need to hold the io_lock.
1387                          */
1388                         error = bus_dmamap_load(sc->dma_tag, req->dma_map,
1389                                 req->data, req->length,
1390                                 twa_map_load_data_callback, req,
1391                                 BUS_DMA_WAITOK);
1392                 }
1393
1394                 if (!error)
1395                         error = req->error_code;
1396                 else {
1397                         if (error == EINPROGRESS) {
1398                                 /*
1399                                  * Specifying sc->io_lock as the lockfuncarg
1400                                  * in ...tag_create should protect the access
1401                                  * of ...FLAGS_MAPPED from the callback.
1402                                  */
1403                                 spin_lock(sc->io_lock);
1404                                 if (!(req->flags & TW_OSLI_REQ_FLAGS_MAPPED))
1405                                         req->flags |= TW_OSLI_REQ_FLAGS_IN_PROGRESS;
1406                                 tw_osli_disallow_new_requests(sc, &(req->req_handle));
1407                                 spin_unlock(sc->io_lock);
1408                                 error = 0;
1409                         } else {
1410                                 tw_osli_printf(sc, "error = %d",
1411                                         TW_CL_SEVERITY_ERROR_STRING,
1412                                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
1413                                         0x9999,
1414                                         "Failed to map DMA memory "
1415                                         "for I/O request",
1416                                         error);
1417                                 req->flags |= TW_OSLI_REQ_FLAGS_FAILED;
1418                                 /* Free alignment buffer if it was used. */
1419                                 if (req->flags &
1420                                         TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1421                                         kfree(req->data, TW_OSLI_MALLOC_CLASS);
1422                                         /*
1423                                          * Restore original data pointer
1424                                          * and length.
1425                                          */
1426                                         req->data = req->real_data;
1427                                         req->length = req->real_length;
1428                                 }
1429                         }
1430                 }
1431
1432         } else {
1433                 /* Mark the request as currently being processed. */
1434                 req->state = TW_OSLI_REQ_STATE_BUSY;
1435                 /* Move the request into the busy queue. */
1436                 tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
1437                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU)
1438                         error = tw_cl_fw_passthru(&sc->ctlr_handle,
1439                                         &(req->req_pkt), &(req->req_handle));
1440                 else
1441                         error = tw_cl_start_io(&sc->ctlr_handle,
1442                                         &(req->req_pkt), &(req->req_handle));
1443                 if (error) {
1444                         req->error_code = error;
1445                         req->req_pkt.tw_osl_callback(&(req->req_handle));
1446                 }
1447         }
1448         return(error);
1449 }
1450
1451
1452
1453 /*
1454  * Function name:       tw_osli_unmap_request
1455  * Description:         Undoes the mapping done by tw_osli_map_request.
1456  *
1457  * Input:               req     -- ptr to request pkt
1458  * Output:              None
1459  * Return value:        None
1460  */
1461 TW_VOID
1462 tw_osli_unmap_request(struct tw_osli_req_context *req)
1463 {
1464         struct twa_softc        *sc = req->ctlr;
1465
1466         tw_osli_dbg_dprintf(10, sc, "entered");
1467
1468         /* If the command involved data, unmap that too. */
1469         if (req->data != NULL) {
1470                 if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
1471                         /* Lock against multiple simultaneous ioctl calls. */
1472                         spin_lock(sc->io_lock);
1473
1474                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1475                                 bus_dmamap_sync(sc->ioctl_tag,
1476                                         sc->ioctl_map, BUS_DMASYNC_POSTREAD);
1477
1478                                 /*
1479                                  * If we are using a bounce buffer, and we are
1480                                  * reading data, copy the real data in.
1481                                  */
1482                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1483                                         bcopy(req->data, req->real_data,
1484                                                 req->real_length);
1485                         }
1486
1487                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1488                                 bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
1489                                         BUS_DMASYNC_POSTWRITE);
1490
1491                         bus_dmamap_unload(sc->ioctl_tag, sc->ioctl_map);
1492
1493                         spin_unlock(sc->io_lock);
1494                 } else {
1495                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
1496                                 bus_dmamap_sync(sc->dma_tag,
1497                                         req->dma_map, BUS_DMASYNC_POSTREAD);
1498
1499                                 /*
1500                                  * If we are using a bounce buffer, and we are
1501                                  * reading data, copy the real data in.
1502                                  */
1503                                 if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
1504                                         bcopy(req->data, req->real_data,
1505                                                 req->real_length);
1506                         }
1507                         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
1508                                 bus_dmamap_sync(sc->dma_tag, req->dma_map,
1509                                         BUS_DMASYNC_POSTWRITE);
1510
1511                         bus_dmamap_unload(sc->dma_tag, req->dma_map);
1512                 }
1513         }
1514
1515         /* Free alignment buffer if it was used. */
1516         if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
1517                 kfree(req->data, TW_OSLI_MALLOC_CLASS);
1518                 /* Restore original data pointer and length. */
1519                 req->data = req->real_data;
1520                 req->length = req->real_length;
1521         }
1522 }
1523
1524
1525
1526 #ifdef TW_OSL_DEBUG
1527
1528 TW_VOID twa_report_stats(TW_VOID);
1529 TW_VOID twa_reset_stats(TW_VOID);
1530 TW_VOID tw_osli_print_ctlr_stats(struct twa_softc *sc);
1531 TW_VOID twa_print_req_info(struct tw_osli_req_context *req);
1532
1533
1534 /*
1535  * Function name:       twa_report_stats
1536  * Description:         For being called from ddb.  Calls functions that print
1537  *                      OSL and CL internal stats for the controller.
1538  *
1539  * Input:               None
1540  * Output:              None
1541  * Return value:        None
1542  */
1543 TW_VOID
1544 twa_report_stats(TW_VOID)
1545 {
1546         struct twa_softc        *sc;
1547         TW_INT32                i;
1548
1549         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1550                 tw_osli_print_ctlr_stats(sc);
1551                 tw_cl_print_ctlr_stats(&sc->ctlr_handle);
1552         }
1553 }
1554
1555
1556
1557 /*
1558  * Function name:       tw_osli_print_ctlr_stats
1559  * Description:         For being called from ddb.  Prints OSL controller stats
1560  *
1561  * Input:               sc      -- ptr to OSL internal controller context
1562  * Output:              None
1563  * Return value:        None
1564  */
1565 TW_VOID
1566 tw_osli_print_ctlr_stats(struct twa_softc *sc)
1567 {
1568         twa_printf(sc, "osl_ctlr_ctxt = %p\n", sc);
1569         twa_printf(sc, "OSLq type  current  max\n");
1570         twa_printf(sc, "free      %04d     %04d\n",
1571                 sc->q_stats[TW_OSLI_FREE_Q].cur_len,
1572                 sc->q_stats[TW_OSLI_FREE_Q].max_len);
1573         twa_printf(sc, "busy      %04d     %04d\n",
1574                 sc->q_stats[TW_OSLI_BUSY_Q].cur_len,
1575                 sc->q_stats[TW_OSLI_BUSY_Q].max_len);
1576 }
1577
1578
1579
1580 /*
1581  * Function name:       twa_print_req_info
1582  * Description:         For being called from ddb.  Calls functions that print
1583  *                      OSL and CL internal details for the request.
1584  *
1585  * Input:               req     -- ptr to OSL internal request context
1586  * Output:              None
1587  * Return value:        None
1588  */
1589 TW_VOID
1590 twa_print_req_info(struct tw_osli_req_context *req)
1591 {
1592         struct twa_softc        *sc = req->ctlr;
1593
1594         twa_printf(sc, "OSL details for request:\n");
1595         twa_printf(sc, "osl_req_ctxt = %p, cl_req_ctxt = %p\n"
1596                 "data = %p, length = 0x%x, real_data = %p, real_length = 0x%x\n"
1597                 "state = 0x%x, flags = 0x%x, error = 0x%x, orig_req = %p\n"
1598                 "next_req = %p, prev_req = %p, dma_map = %p\n",
1599                 req->req_handle.osl_req_ctxt, req->req_handle.cl_req_ctxt,
1600                 req->data, req->length, req->real_data, req->real_length,
1601                 req->state, req->flags, req->error_code, req->orig_req,
1602                 req->link.next, req->link.prev, req->dma_map);
1603         tw_cl_print_req_info(&(req->req_handle));
1604 }
1605
1606
1607
1608 /*
1609  * Function name:       twa_reset_stats
1610  * Description:         For being called from ddb.
1611  *                      Resets some OSL controller stats.
1612  *
1613  * Input:               None
1614  * Output:              None
1615  * Return value:        None
1616  */
1617 TW_VOID
1618 twa_reset_stats(TW_VOID)
1619 {
1620         struct twa_softc        *sc;
1621         TW_INT32                i;
1622
1623         for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
1624                 sc->q_stats[TW_OSLI_FREE_Q].max_len = 0;
1625                 sc->q_stats[TW_OSLI_BUSY_Q].max_len = 0;
1626                 tw_cl_reset_stats(&sc->ctlr_handle);
1627         }
1628 }
1629
1630 #endif /* TW_OSL_DEBUG */