drivers/base/firmware_class.c

   1 /*
   2  * firmware_class.c - Multi purpose firmware loading support
   3  *
   4  * Copyright (c) 2003 Manuel Estrada Sainz
   5  *
   6  * Please see Documentation/firmware_class/ for more information.
   7  *
   8  */
   9
  10 #include <linux/capability.h>
  11 #include <linux/device.h>
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/timer.h>
  15 #include <linux/vmalloc.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/bitops.h>
  18 #include <linux/mutex.h>
  19 #include <linux/kthread.h>
  20 #include <linux/highmem.h>
  21 #include <linux/firmware.h>
  22 #include <linux/slab.h>
  23
  24 #define to_dev(obj) container_of(obj, struct device, kobj)
  25
  26 MODULE_AUTHOR("Manuel Estrada Sainz");
  27 MODULE_DESCRIPTION("Multi purpose firmware loading support");
  28 MODULE_LICENSE("GPL");
  29
  30 enum {
  31         FW_STATUS_LOADING,
  32         FW_STATUS_DONE,
  33         FW_STATUS_ABORT,
  34 };
  35
  36 static int loading_timeout = 60;        /* In seconds */
  37
  38 /* fw_lock could be moved to 'struct firmware_priv' but since it is just
  39  * guarding for corner cases a global lock should be OK */
  40 static DEFINE_MUTEX(fw_lock);
  41
  42 struct firmware_priv {
  43         char *fw_id;
  44         struct completion completion;
  45         struct bin_attribute attr_data;
  46         struct firmware *fw;
  47         unsigned long status;
  48         struct page **pages;
  49         int nr_pages;
  50         int page_array_size;
  51         const char *vdata;
  52         struct timer_list timeout;
  53 };
  54
  55 #ifdef CONFIG_FW_LOADER
  56 extern struct builtin_fw __start_builtin_fw[];
  57 extern struct builtin_fw __end_builtin_fw[];
  58 #else /* Module case. Avoid ifdefs later; it'll all optimise out */
  59 static struct builtin_fw *__start_builtin_fw;
  60 static struct builtin_fw *__end_builtin_fw;
  61 #endif
  62
  63 static void
  64 fw_load_abort(struct firmware_priv *fw_priv)
  65 {
  66         set_bit(FW_STATUS_ABORT, &fw_priv->status);
  67         wmb();
  68         complete(&fw_priv->completion);
  69 }
  70
  71 static ssize_t
  72 firmware_timeout_show(struct class *class,
  73                       struct class_attribute *attr,
  74                       char *buf)
  75 {
  76         return sprintf(buf, "%d\n", loading_timeout);
  77 }
  78
  79 /**
  80  * firmware_timeout_store - set number of seconds to wait for firmware
  81  * @class: device class pointer
  82  * @attr: device attribute pointer
  83  * @buf: buffer to scan for timeout value
  84  * @count: number of bytes in @buf
  85  *
  86  *      Sets the number of seconds to wait for the firmware.  Once
  87  *      this expires an error will be returned to the driver and no
  88  *      firmware will be provided.
  89  *
  90  *      Note: zero means 'wait forever'.
  91  **/
  92 static ssize_t
  93 firmware_timeout_store(struct class *class,
  94                         struct class_attribute *attr,
  95                         const char *buf, size_t count)
  96 {
  97         loading_timeout = simple_strtol(buf, NULL, 10);
  98         if (loading_timeout < 0)
  99                 loading_timeout = 0;
 100         return count;
 101 }
 102
 103 static CLASS_ATTR(timeout, 0644, firmware_timeout_show, firmware_timeout_store);
 104
 105 static void fw_dev_release(struct device *dev);
 106
 107 static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env)
 108 {
 109         struct firmware_priv *fw_priv = dev_get_drvdata(dev);
 110
 111         if (add_uevent_var(env, "FIRMWARE=%s", fw_priv->fw_id))
 112                 return -ENOMEM;
 113         if (add_uevent_var(env, "TIMEOUT=%i", loading_timeout))
 114                 return -ENOMEM;
 115
 116         return 0;
 117 }
 118
 119 static struct class firmware_class = {
 120         .name           = "firmware",
 121         .dev_uevent     = firmware_uevent,
 122         .dev_release    = fw_dev_release,
 123 };
 124
 125 static ssize_t firmware_loading_show(struct device *dev,
 126                                      struct device_attribute *attr, char *buf)
 127 {
 128         struct firmware_priv *fw_priv = dev_get_drvdata(dev);
 129         int loading = test_bit(FW_STATUS_LOADING, &fw_priv->status);
 130         return sprintf(buf, "%d\n", loading);
 131 }
 132
 133 /* Some architectures don't have PAGE_KERNEL_RO */
 134 #ifndef PAGE_KERNEL_RO
 135 #define PAGE_KERNEL_RO PAGE_KERNEL
 136 #endif
 137 /**
 138  * firmware_loading_store - set value in the 'loading' control file
 139  * @dev: device pointer
 140  * @attr: device attribute pointer
 141  * @buf: buffer to scan for loading control value
 142  * @count: number of bytes in @buf
 143  *
 144  *      The relevant values are:
 145  *
 146  *       1: Start a load, discarding any previous partial load.
 147  *       0: Conclude the load and hand the data to the driver code.
 148  *      -1: Conclude the load with an error and discard any written data.
 149  **/
 150 static ssize_t firmware_loading_store(struct device *dev,
 151                                       struct device_attribute *attr,
 152                                       const char *buf, size_t count)
 153 {
 154         struct firmware_priv *fw_priv = dev_get_drvdata(dev);
 155         int loading = simple_strtol(buf, NULL, 10);
 156         int i;
 157
 158         switch (loading) {
 159         case 1:
 160                 mutex_lock(&fw_lock);
 161                 if (!fw_priv->fw) {
 162                         mutex_unlock(&fw_lock);
 163                         break;
 164                 }
 165                 vfree(fw_priv->fw->data);
 166                 fw_priv->fw->data = NULL;
 167                 for (i = 0; i < fw_priv->nr_pages; i++)
 168                         __free_page(fw_priv->pages[i]);
 169                 kfree(fw_priv->pages);
 170                 fw_priv->pages = NULL;
 171                 fw_priv->page_array_size = 0;
 172                 fw_priv->nr_pages = 0;
 173                 fw_priv->fw->size = 0;
 174                 set_bit(FW_STATUS_LOADING, &fw_priv->status);
 175                 mutex_unlock(&fw_lock);
 176                 break;
 177         case 0:
 178                 if (test_bit(FW_STATUS_LOADING, &fw_priv->status)) {
 179                         vfree(fw_priv->fw->data);
 180                         fw_priv->fw->data = vmap(fw_priv->pages,
 181                                                  fw_priv->nr_pages,
 182                                                  0, PAGE_KERNEL_RO);
 183                         if (!fw_priv->fw->data) {
 184                                 dev_err(dev, "%s: vmap() failed\n", __func__);
 185                                 goto err;
 186                         }
 187                         /* Pages will be freed by vfree() */
 188                         fw_priv->page_array_size = 0;
 189                         fw_priv->nr_pages = 0;
 190                         complete(&fw_priv->completion);
 191                         clear_bit(FW_STATUS_LOADING, &fw_priv->status);
 192                         break;
 193                 }
 194                 /* fallthrough */
 195         default:
 196                 dev_err(dev, "%s: unexpected value (%d)\n", __func__, loading);
 197                 /* fallthrough */
 198         case -1:
 199         err:
 200                 fw_load_abort(fw_priv);
 201                 break;
 202         }
 203
 204         return count;
 205 }
 206
 207 static DEVICE_ATTR(loading, 0644, firmware_loading_show, firmware_loading_store);
 208
 209 static ssize_t
 210 firmware_data_read(struct kobject *kobj, struct bin_attribute *bin_attr,
 211                    char *buffer, loff_t offset, size_t count)
 212 {
 213         struct device *dev = to_dev(kobj);
 214         struct firmware_priv *fw_priv = dev_get_drvdata(dev);
 215         struct firmware *fw;
 216         ssize_t ret_count;
 217
 218         mutex_lock(&fw_lock);
 219         fw = fw_priv->fw;
 220         if (!fw || test_bit(FW_STATUS_DONE, &fw_priv->status)) {
 221                 ret_count = -ENODEV;
 222                 goto out;
 223         }
 224         if (offset > fw->size) {
 225                 ret_count = 0;
 226                 goto out;
 227         }
 228         if (count > fw->size - offset)
 229                 count = fw->size - offset;
 230
 231         ret_count = count;
 232
 233         while (count) {
 234                 void *page_data;
 235                 int page_nr = offset >> PAGE_SHIFT;
 236                 int page_ofs = offset & (PAGE_SIZE-1);
 237                 int page_cnt = min_t(size_t, PAGE_SIZE - page_ofs, count);
 238
 239                 page_data = kmap(fw_priv->pages[page_nr]);
 240
 241                 memcpy(buffer, page_data + page_ofs, page_cnt);
 242
 243                 kunmap(fw_priv->pages[page_nr]);
 244                 buffer += page_cnt;
 245                 offset += page_cnt;
 246                 count -= page_cnt;
 247         }
 248 out:
 249         mutex_unlock(&fw_lock);
 250         return ret_count;
 251 }
 252
 253 static int
 254 fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
 255 {
 256         int pages_needed = ALIGN(min_size, PAGE_SIZE) >> PAGE_SHIFT;
 257
 258         /* If the array of pages is too small, grow it... */
 259         if (fw_priv->page_array_size < pages_needed) {
 260                 int new_array_size = max(pages_needed,
 261                                          fw_priv->page_array_size * 2);
 262                 struct page **new_pages;
 263
 264                 new_pages = kmalloc(new_array_size * sizeof(void *),
 265                                     GFP_KERNEL);
 266                 if (!new_pages) {
 267                         fw_load_abort(fw_priv);
 268                         return -ENOMEM;
 269                 }
 270                 memcpy(new_pages, fw_priv->pages,
 271                        fw_priv->page_array_size * sizeof(void *));
 272                 memset(&new_pages[fw_priv->page_array_size], 0, sizeof(void *) *
 273                        (new_array_size - fw_priv->page_array_size));
 274                 kfree(fw_priv->pages);
 275                 fw_priv->pages = new_pages;
 276                 fw_priv->page_array_size = new_array_size;
 277         }
 278
 279         while (fw_priv->nr_pages < pages_needed) {
 280                 fw_priv->pages[fw_priv->nr_pages] =
 281                         alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
 282
 283                 if (!fw_priv->pages[fw_priv->nr_pages]) {
 284                         fw_load_abort(fw_priv);
 285                         return -ENOMEM;
 286                 }
 287                 fw_priv->nr_pages++;
 288         }
 289         return 0;
 290 }
 291
 292 /**
 293  * firmware_data_write - write method for firmware
 294  * @kobj: kobject for the device
 295  * @bin_attr: bin_attr structure
 296  * @buffer: buffer being written
 297  * @offset: buffer offset for write in total data store area
 298  * @count: buffer size
 299  *
 300  *      Data written to the 'data' attribute will be later handed to
 301  *      the driver as a firmware image.
 302  **/
 303 static ssize_t
 304 firmware_data_write(struct kobject *kobj, struct bin_attribute *bin_attr,
 305                     char *buffer, loff_t offset, size_t count)
 306 {
 307         struct device *dev = to_dev(kobj);
 308         struct firmware_priv *fw_priv = dev_get_drvdata(dev);
 309         struct firmware *fw;
 310         ssize_t retval;
 311
 312         if (!capable(CAP_SYS_RAWIO))
 313                 return -EPERM;
 314
 315         mutex_lock(&fw_lock);
 316         fw = fw_priv->fw;
 317         if (!fw || test_bit(FW_STATUS_DONE, &fw_priv->status)) {
 318                 retval = -ENODEV;
 319                 goto out;
 320         }
 321         retval = fw_realloc_buffer(fw_priv, offset + count);
 322         if (retval)
 323                 goto out;
 324
 325         retval = count;
 326
 327         while (count) {
 328                 void *page_data;
 329                 int page_nr = offset >> PAGE_SHIFT;
 330                 int page_ofs = offset & (PAGE_SIZE - 1);
 331                 int page_cnt = min_t(size_t, PAGE_SIZE - page_ofs, count);
 332
 333                 page_data = kmap(fw_priv->pages[page_nr]);
 334
 335                 memcpy(page_data + page_ofs, buffer, page_cnt);
 336
 337                 kunmap(fw_priv->pages[page_nr]);
 338                 buffer += page_cnt;
 339                 offset += page_cnt;
 340                 count -= page_cnt;
 341         }
 342
 343         fw->size = max_t(size_t, offset, fw->size);
 344 out:
 345         mutex_unlock(&fw_lock);
 346         return retval;
 347 }
 348
 349 static struct bin_attribute firmware_attr_data_tmpl = {
 350         .attr = {.name = "data", .mode = 0644},
 351         .size = 0,
 352         .read = firmware_data_read,
 353         .write = firmware_data_write,
 354 };
 355
 356 static void fw_dev_release(struct device *dev)
 357 {
 358         struct firmware_priv *fw_priv = dev_get_drvdata(dev);
 359         int i;
 360
 361         for (i = 0; i < fw_priv->nr_pages; i++)
 362                 __free_page(fw_priv->pages[i]);
 363         kfree(fw_priv->pages);
 364         kfree(fw_priv->fw_id);
 365         kfree(fw_priv);
 366         kfree(dev);
 367
 368         module_put(THIS_MODULE);
 369 }
 370
 371 static void
 372 firmware_class_timeout(u_long data)
 373 {
 374         struct firmware_priv *fw_priv = (struct firmware_priv *) data;
 375         fw_load_abort(fw_priv);
 376 }
 377
 378 static int fw_register_device(struct device **dev_p, const char *fw_name,
 379                               struct device *device)
 380 {
 381         int retval;
 382         struct firmware_priv *fw_priv = kzalloc(sizeof(*fw_priv),
 383                                                 GFP_KERNEL);
 384         struct device *f_dev = kzalloc(sizeof(*f_dev), GFP_KERNEL);
 385
 386         *dev_p = NULL;
 387
 388         if (!fw_priv || !f_dev) {
 389                 dev_err(device, "%s: kmalloc failed\n", __func__);
 390                 retval = -ENOMEM;
 391                 goto error_kfree;
 392         }
 393
 394         init_completion(&fw_priv->completion);
 395         fw_priv->attr_data = firmware_attr_data_tmpl;
 396         fw_priv->fw_id = kstrdup(fw_name, GFP_KERNEL);
 397         if (!fw_priv->fw_id) {
 398                 dev_err(device, "%s: Firmware name allocation failed\n",
 399                         __func__);
 400                 retval = -ENOMEM;
 401                 goto error_kfree;
 402         }
 403
 404         fw_priv->timeout.function = firmware_class_timeout;
 405         fw_priv->timeout.data = (u_long) fw_priv;
 406         init_timer(&fw_priv->timeout);
 407
 408         dev_set_name(f_dev, "%s", dev_name(device));
 409         f_dev->parent = device;
 410         f_dev->class = &firmware_class;
 411         dev_set_drvdata(f_dev, fw_priv);
 412         dev_set_uevent_suppress(f_dev, 1);
 413         retval = device_register(f_dev);
 414         if (retval) {
 415                 dev_err(device, "%s: device_register failed\n", __func__);
 416                 put_device(f_dev);
 417                 return retval;
 418         }
 419         *dev_p = f_dev;
 420         return 0;
 421
 422 error_kfree:
 423         kfree(f_dev);
 424         kfree(fw_priv);
 425         return retval;
 426 }
 427
 428 static int fw_setup_device(struct firmware *fw, struct device **dev_p,
 429                            const char *fw_name, struct device *device,
 430                            int uevent)
 431 {
 432         struct device *f_dev;
 433         struct firmware_priv *fw_priv;
 434         int retval;
 435
 436         *dev_p = NULL;
 437         retval = fw_register_device(&f_dev, fw_name, device);
 438         if (retval)
 439                 goto out;
 440
 441         /* Need to pin this module until class device is destroyed */
 442         __module_get(THIS_MODULE);
 443
 444         fw_priv = dev_get_drvdata(f_dev);
 445
 446         fw_priv->fw = fw;
 447         sysfs_bin_attr_init(&fw_priv->attr_data);
 448         retval = sysfs_create_bin_file(&f_dev->kobj, &fw_priv->attr_data);
 449         if (retval) {
 450                 dev_err(device, "%s: sysfs_create_bin_file failed\n", __func__);
 451                 goto error_unreg;
 452         }
 453
 454         retval = device_create_file(f_dev, &dev_attr_loading);
 455         if (retval) {
 456                 dev_err(device, "%s: device_create_file failed\n", __func__);
 457                 goto error_unreg;
 458         }
 459
 460         if (uevent)
 461                 dev_set_uevent_suppress(f_dev, 0);
 462         *dev_p = f_dev;
 463         goto out;
 464
 465 error_unreg:
 466         device_unregister(f_dev);
 467 out:
 468         return retval;
 469 }
 470
 471 static int
 472 _request_firmware(const struct firmware **firmware_p, const char *name,
 473                  struct device *device, int uevent)
 474 {
 475         struct device *f_dev;
 476         struct firmware_priv *fw_priv;
 477         struct firmware *firmware;
 478         struct builtin_fw *builtin;
 479         int retval;
 480
 481         if (!firmware_p)
 482                 return -EINVAL;
 483
 484         *firmware_p = firmware = kzalloc(sizeof(*firmware), GFP_KERNEL);
 485         if (!firmware) {
 486                 dev_err(device, "%s: kmalloc(struct firmware) failed\n",
 487                         __func__);
 488                 retval = -ENOMEM;
 489                 goto out;
 490         }
 491
 492         for (builtin = __start_builtin_fw; builtin != __end_builtin_fw;
 493              builtin++) {
 494                 if (strcmp(name, builtin->name))
 495                         continue;
 496                 dev_info(device, "firmware: using built-in firmware %s\n",
 497                          name);
 498                 firmware->size = builtin->size;
 499                 firmware->data = builtin->data;
 500                 return 0;
 501         }
 502
 503         if (uevent)
 504                 dev_info(device, "firmware: requesting %s\n", name);
 505
 506         retval = fw_setup_device(firmware, &f_dev, name, device, uevent);
 507         if (retval)
 508                 goto error_kfree_fw;
 509
 510         fw_priv = dev_get_drvdata(f_dev);
 511
 512         if (uevent) {
 513                 if (loading_timeout > 0) {
 514                         fw_priv->timeout.expires = jiffies + loading_timeout * HZ;
 515                         add_timer(&fw_priv->timeout);
 516                 }
 517
 518                 kobject_uevent(&f_dev->kobj, KOBJ_ADD);
 519                 wait_for_completion(&fw_priv->completion);
 520                 set_bit(FW_STATUS_DONE, &fw_priv->status);
 521                 del_timer_sync(&fw_priv->timeout);
 522         } else
 523                 wait_for_completion(&fw_priv->completion);
 524
 525         mutex_lock(&fw_lock);
 526         if (!fw_priv->fw->size || test_bit(FW_STATUS_ABORT, &fw_priv->status)) {
 527                 retval = -ENOENT;
 528                 release_firmware(fw_priv->fw);
 529                 *firmware_p = NULL;
 530         }
 531         fw_priv->fw = NULL;
 532         mutex_unlock(&fw_lock);
 533         device_unregister(f_dev);
 534         goto out;
 535
 536 error_kfree_fw:
 537         kfree(firmware);
 538         *firmware_p = NULL;
 539 out:
 540         return retval;
 541 }
 542
 543 /**
 544  * request_firmware: - send firmware request and wait for it
 545  * @firmware_p: pointer to firmware image
 546  * @name: name of firmware file
 547  * @device: device for which firmware is being loaded
 548  *
 549  *      @firmware_p will be used to return a firmware image by the name
 550  *      of @name for device @device.
 551  *
 552  *      Should be called from user context where sleeping is allowed.
 553  *
 554  *      @name will be used as $FIRMWARE in the uevent environment and
 555  *      should be distinctive enough not to be confused with any other
 556  *      firmware image for this or any other device.
 557  **/
 558 int
 559 request_firmware(const struct firmware **firmware_p, const char *name,
 560                  struct device *device)
 561 {
 562         int uevent = 1;
 563         return _request_firmware(firmware_p, name, device, uevent);
 564 }
 565
 566 /**
 567  * release_firmware: - release the resource associated with a firmware image
 568  * @fw: firmware resource to release
 569  **/
 570 void
 571 release_firmware(const struct firmware *fw)
 572 {
 573         struct builtin_fw *builtin;
 574
 575         if (fw) {
 576                 for (builtin = __start_builtin_fw; builtin != __end_builtin_fw;
 577                      builtin++) {
 578                         if (fw->data == builtin->data)
 579                                 goto free_fw;
 580                 }
 581                 vfree(fw->data);
 582         free_fw:
 583                 kfree(fw);
 584         }
 585 }
 586
 587 /* Async support */
 588 struct firmware_work {
 589         struct work_struct work;
 590         struct module *module;
 591         const char *name;
 592         struct device *device;
 593         void *context;
 594         void (*cont)(const struct firmware *fw, void *context);
 595         int uevent;
 596 };
 597
 598 static int
 599 request_firmware_work_func(void *arg)
 600 {
 601         struct firmware_work *fw_work = arg;
 602         const struct firmware *fw;
 603         int ret;
 604         if (!arg) {
 605                 WARN_ON(1);
 606                 return 0;
 607         }
 608         ret = _request_firmware(&fw, fw_work->name, fw_work->device,
 609                 fw_work->uevent);
 610
 611         fw_work->cont(fw, fw_work->context);
 612
 613         module_put(fw_work->module);
 614         kfree(fw_work);
 615         return ret;
 616 }
 617
 618 /**
 619  * request_firmware_nowait - asynchronous version of request_firmware
 620  * @module: module requesting the firmware
 621  * @uevent: sends uevent to copy the firmware image if this flag
 622  *      is non-zero else the firmware copy must be done manually.
 623  * @name: name of firmware file
 624  * @device: device for which firmware is being loaded
 625  * @gfp: allocation flags
 626  * @context: will be passed over to @cont, and
 627  *      @fw may be %NULL if firmware request fails.
 628  * @cont: function will be called asynchronously when the firmware
 629  *      request is over.
 630  *
 631  *      Asynchronous variant of request_firmware() for user contexts where
 632  *      it is not possible to sleep for long time. It can't be called
 633  *      in atomic contexts.
 634  **/
 635 int
 636 request_firmware_nowait(
 637         struct module *module, int uevent,
 638         const char *name, struct device *device, gfp_t gfp, void *context,
 639         void (*cont)(const struct firmware *fw, void *context))
 640 {
 641         struct task_struct *task;
 642         struct firmware_work *fw_work = kmalloc(sizeof (struct firmware_work),
 643                                                 gfp);
 644
 645         if (!fw_work)
 646                 return -ENOMEM;
 647         if (!try_module_get(module)) {
 648                 kfree(fw_work);
 649                 return -EFAULT;
 650         }
 651
 652         *fw_work = (struct firmware_work) {
 653                 .module = module,
 654                 .name = name,
 655                 .device = device,
 656                 .context = context,
 657                 .cont = cont,
 658                 .uevent = uevent,
 659         };
 660
 661         task = kthread_run(request_firmware_work_func, fw_work,
 662                             "firmware/%s", name);
 663
 664         if (IS_ERR(task)) {
 665                 fw_work->cont(NULL, fw_work->context);
 666                 module_put(fw_work->module);
 667                 kfree(fw_work);
 668                 return PTR_ERR(task);
 669         }
 670         return 0;
 671 }
 672
 673 static int __init
 674 firmware_class_init(void)
 675 {
 676         int error;
 677         error = class_register(&firmware_class);
 678         if (error) {
 679                 printk(KERN_ERR "%s: class_register failed\n", __func__);
 680                 return error;
 681         }
 682         error = class_create_file(&firmware_class, &class_attr_timeout);
 683         if (error) {
 684                 printk(KERN_ERR "%s: class_create_file failed\n",
 685                        __func__);
 686                 class_unregister(&firmware_class);
 687         }
 688         return error;
 689
 690 }
 691 static void __exit
 692 firmware_class_exit(void)
 693 {
 694         class_unregister(&firmware_class);
 695 }
 696
 697 fs_initcall(firmware_class_init);
 698 module_exit(firmware_class_exit);
 699
 700 EXPORT_SYMBOL(release_firmware);
 701 EXPORT_SYMBOL(request_firmware);
 702 EXPORT_SYMBOL(request_firmware_nowait);