sound/pci/asihpi/hpioctl.c

   1 /*******************************************************************************
   2     AudioScience HPI driver
   3     Common Linux HPI ioctl and module probe/remove functions
   4
   5     Copyright (C) 1997-2014  AudioScience Inc. <support@audioscience.com>
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of version 2 of the GNU General Public License as
   9     published by the Free Software Foundation;
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16 *******************************************************************************/
  17 #define SOURCEFILE_NAME "hpioctl.c"
  18
  19 #include "hpi_internal.h"
  20 #include "hpi_version.h"
  21 #include "hpimsginit.h"
  22 #include "hpidebug.h"
  23 #include "hpimsgx.h"
  24 #include "hpioctl.h"
  25 #include "hpicmn.h"
  26
  27 #include <linux/fs.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/slab.h>
  30 #include <linux/moduleparam.h>
  31 #include <linux/uaccess.h>
  32 #include <linux/pci.h>
  33 #include <linux/stringify.h>
  34 #include <linux/module.h>
  35 #include <linux/vmalloc.h>
  36 #include <linux/nospec.h>
  37
  38 #ifdef MODULE_FIRMWARE
  39 MODULE_FIRMWARE("asihpi/dsp5000.bin");
  40 MODULE_FIRMWARE("asihpi/dsp6200.bin");
  41 MODULE_FIRMWARE("asihpi/dsp6205.bin");
  42 MODULE_FIRMWARE("asihpi/dsp6400.bin");
  43 MODULE_FIRMWARE("asihpi/dsp6600.bin");
  44 MODULE_FIRMWARE("asihpi/dsp8700.bin");
  45 MODULE_FIRMWARE("asihpi/dsp8900.bin");
  46 #endif
  47
  48 static int prealloc_stream_buf;
  49 module_param(prealloc_stream_buf, int, S_IRUGO);
  50 MODULE_PARM_DESC(prealloc_stream_buf,
  51         "Preallocate size for per-adapter stream buffer");
  52
  53 /* Allow the debug level to be changed after module load.
  54  E.g.   echo 2 > /sys/module/asihpi/parameters/hpiDebugLevel
  55 */
  56 module_param(hpi_debug_level, int, S_IRUGO | S_IWUSR);
  57 MODULE_PARM_DESC(hpi_debug_level, "debug verbosity 0..5");
  58
  59 /* List of adapters found */
  60 static struct hpi_adapter adapters[HPI_MAX_ADAPTERS];
  61
  62 /* Wrapper function to HPI_Message to enable dumping of the
  63    message and response types.
  64 */
  65 static void hpi_send_recv_f(struct hpi_message *phm, struct hpi_response *phr,
  66         struct file *file)
  67 {
  68         if ((phm->adapter_index >= HPI_MAX_ADAPTERS)
  69                 && (phm->object != HPI_OBJ_SUBSYSTEM))
  70                 phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
  71         else
  72                 hpi_send_recv_ex(phm, phr, file);
  73 }
  74
  75 /* This is called from hpifunc.c functions, called by ALSA
  76  * (or other kernel process) In this case there is no file descriptor
  77  * available for the message cache code
  78  */
  79 void hpi_send_recv(struct hpi_message *phm, struct hpi_response *phr)
  80 {
  81         hpi_send_recv_f(phm, phr, HOWNER_KERNEL);
  82 }
  83
  84 EXPORT_SYMBOL(hpi_send_recv);
  85 /* for radio-asihpi */
  86
  87 int asihpi_hpi_release(struct file *file)
  88 {
  89         struct hpi_message hm;
  90         struct hpi_response hr;
  91
  92 /* HPI_DEBUG_LOG(INFO,"hpi_release file %p, pid %d\n", file, current->pid); */
  93         /* close the subsystem just in case the application forgot to. */
  94         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
  95                 HPI_SUBSYS_CLOSE);
  96         hpi_send_recv_ex(&hm, &hr, file);
  97         return 0;
  98 }
  99
 100 long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 101 {
 102         struct hpi_ioctl_linux __user *phpi_ioctl_data;
 103         void __user *puhm;
 104         void __user *puhr;
 105         union hpi_message_buffer_v1 *hm;
 106         union hpi_response_buffer_v1 *hr;
 107         u16 res_max_size;
 108         u32 uncopied_bytes;
 109         int err = 0;
 110
 111         if (cmd != HPI_IOCTL_LINUX)
 112                 return -EINVAL;
 113
 114         hm = kmalloc(sizeof(*hm), GFP_KERNEL);
 115         hr = kzalloc(sizeof(*hr), GFP_KERNEL);
 116         if (!hm || !hr) {
 117                 err = -ENOMEM;
 118                 goto out;
 119         }
 120
 121         phpi_ioctl_data = (struct hpi_ioctl_linux __user *)arg;
 122
 123         /* Read the message and response pointers from user space.  */
 124         if (get_user(puhm, &phpi_ioctl_data->phm)
 125                 || get_user(puhr, &phpi_ioctl_data->phr)) {
 126                 err = -EFAULT;
 127                 goto out;
 128         }
 129
 130         /* Now read the message size and data from user space.  */
 131         if (get_user(hm->h.size, (u16 __user *)puhm)) {
 132                 err = -EFAULT;
 133                 goto out;
 134         }
 135         if (hm->h.size > sizeof(*hm))
 136                 hm->h.size = sizeof(*hm);
 137
 138         /* printk(KERN_INFO "message size %d\n", hm->h.wSize); */
 139
 140         uncopied_bytes = copy_from_user(hm, puhm, hm->h.size);
 141         if (uncopied_bytes) {
 142                 HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
 143                 err = -EFAULT;
 144                 goto out;
 145         }
 146
 147         if (get_user(res_max_size, (u16 __user *)puhr)) {
 148                 err = -EFAULT;
 149                 goto out;
 150         }
 151         /* printk(KERN_INFO "user response size %d\n", res_max_size); */
 152         if (res_max_size < sizeof(struct hpi_response_header)) {
 153                 HPI_DEBUG_LOG(WARNING, "small res size %d\n", res_max_size);
 154                 err = -EFAULT;
 155                 goto out;
 156         }
 157
 158         res_max_size = min_t(size_t, res_max_size, sizeof(*hr));
 159
 160         switch (hm->h.function) {
 161         case HPI_SUBSYS_CREATE_ADAPTER:
 162         case HPI_ADAPTER_DELETE:
 163                 /* Application must not use these functions! */
 164                 hr->h.size = sizeof(hr->h);
 165                 hr->h.error = HPI_ERROR_INVALID_OPERATION;
 166                 hr->h.function = hm->h.function;
 167                 uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
 168                 if (uncopied_bytes)
 169                         err = -EFAULT;
 170                 else
 171                         err = 0;
 172                 goto out;
 173         }
 174
 175         hr->h.size = res_max_size;
 176         if (hm->h.object == HPI_OBJ_SUBSYSTEM) {
 177                 hpi_send_recv_f(&hm->m0, &hr->r0, file);
 178         } else {
 179                 u16 __user *ptr = NULL;
 180                 u32 size = 0;
 181                 /* -1=no data 0=read from user mem, 1=write to user mem */
 182                 int wrflag = -1;
 183                 struct hpi_adapter *pa = NULL;
 184
 185                 if (hm->h.adapter_index < ARRAY_SIZE(adapters))
 186                         pa = &adapters[array_index_nospec(hm->h.adapter_index,
 187                                                           ARRAY_SIZE(adapters))];
 188
 189                 if (!pa || !pa->adapter || !pa->adapter->type) {
 190                         hpi_init_response(&hr->r0, hm->h.object,
 191                                 hm->h.function, HPI_ERROR_BAD_ADAPTER_NUMBER);
 192
 193                         uncopied_bytes =
 194                                 copy_to_user(puhr, hr, sizeof(hr->h));
 195                         if (uncopied_bytes)
 196                                 err = -EFAULT;
 197                         else
 198                                 err = 0;
 199                         goto out;
 200                 }
 201
 202                 if (mutex_lock_interruptible(&pa->mutex)) {
 203                         err = -EINTR;
 204                         goto out;
 205                 }
 206
 207                 /* Dig out any pointers embedded in the message.  */
 208                 switch (hm->h.function) {
 209                 case HPI_OSTREAM_WRITE:
 210                 case HPI_ISTREAM_READ:{
 211                                 /* Yes, sparse, this is correct. */
 212                                 ptr = (u16 __user *)hm->m0.u.d.u.data.pb_data;
 213                                 size = hm->m0.u.d.u.data.data_size;
 214
 215                                 /* Allocate buffer according to application request.
 216                                    ?Is it better to alloc/free for the duration
 217                                    of the transaction?
 218                                  */
 219                                 if (pa->buffer_size < size) {
 220                                         HPI_DEBUG_LOG(DEBUG,
 221                                                 "Realloc adapter %d stream "
 222                                                 "buffer from %zd to %d\n",
 223                                                 hm->h.adapter_index,
 224                                                 pa->buffer_size, size);
 225                                         if (pa->p_buffer) {
 226                                                 pa->buffer_size = 0;
 227                                                 vfree(pa->p_buffer);
 228                                         }
 229                                         pa->p_buffer = vmalloc(size);
 230                                         if (pa->p_buffer)
 231                                                 pa->buffer_size = size;
 232                                         else {
 233                                                 HPI_DEBUG_LOG(ERROR,
 234                                                         "HPI could not allocate "
 235                                                         "stream buffer size %d\n",
 236                                                         size);
 237
 238                                                 mutex_unlock(&pa->mutex);
 239                                                 err = -EINVAL;
 240                                                 goto out;
 241                                         }
 242                                 }
 243
 244                                 hm->m0.u.d.u.data.pb_data = pa->p_buffer;
 245                                 if (hm->h.function == HPI_ISTREAM_READ)
 246                                         /* from card, WRITE to user mem */
 247                                         wrflag = 1;
 248                                 else
 249                                         wrflag = 0;
 250                                 break;
 251                         }
 252
 253                 default:
 254                         size = 0;
 255                         break;
 256                 }
 257
 258                 if (size && (wrflag == 0)) {
 259                         uncopied_bytes =
 260                                 copy_from_user(pa->p_buffer, ptr, size);
 261                         if (uncopied_bytes)
 262                                 HPI_DEBUG_LOG(WARNING,
 263                                         "Missed %d of %d "
 264                                         "bytes from user\n", uncopied_bytes,
 265                                         size);
 266                 }
 267
 268                 hpi_send_recv_f(&hm->m0, &hr->r0, file);
 269
 270                 if (size && (wrflag == 1)) {
 271                         uncopied_bytes =
 272                                 copy_to_user(ptr, pa->p_buffer, size);
 273                         if (uncopied_bytes)
 274                                 HPI_DEBUG_LOG(WARNING,
 275                                         "Missed %d of %d " "bytes to user\n",
 276                                         uncopied_bytes, size);
 277                 }
 278
 279                 mutex_unlock(&pa->mutex);
 280         }
 281
 282         /* on return response size must be set */
 283         /*printk(KERN_INFO "response size %d\n", hr->h.wSize); */
 284
 285         if (!hr->h.size) {
 286                 HPI_DEBUG_LOG(ERROR, "response zero size\n");
 287                 err = -EFAULT;
 288                 goto out;
 289         }
 290
 291         if (hr->h.size > res_max_size) {
 292                 HPI_DEBUG_LOG(ERROR, "response too big %d %d\n", hr->h.size,
 293                         res_max_size);
 294                 hr->h.error = HPI_ERROR_RESPONSE_BUFFER_TOO_SMALL;
 295                 hr->h.specific_error = hr->h.size;
 296                 hr->h.size = sizeof(hr->h);
 297         }
 298
 299         uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
 300         if (uncopied_bytes) {
 301                 HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
 302                 err = -EFAULT;
 303                 goto out;
 304         }
 305
 306 out:
 307         kfree(hm);
 308         kfree(hr);
 309         return err;
 310 }
 311
 312 static int asihpi_irq_count;
 313
 314 static irqreturn_t asihpi_isr(int irq, void *dev_id)
 315 {
 316         struct hpi_adapter *a = dev_id;
 317         int handled;
 318
 319         if (!a->adapter->irq_query_and_clear) {
 320                 pr_err("asihpi_isr ASI%04X:%d no handler\n", a->adapter->type,
 321                         a->adapter->index);
 322                 return IRQ_NONE;
 323         }
 324
 325         handled = a->adapter->irq_query_and_clear(a->adapter, 0);
 326
 327         if (!handled)
 328                 return IRQ_NONE;
 329
 330         asihpi_irq_count++;
 331         /* printk(KERN_INFO "asihpi_isr %d ASI%04X:%d irq handled\n",
 332            asihpi_irq_count, a->adapter->type, a->adapter->index); */
 333
 334         if (a->interrupt_callback)
 335                 a->interrupt_callback(a);
 336
 337         return IRQ_HANDLED;
 338 }
 339
 340 int asihpi_adapter_probe(struct pci_dev *pci_dev,
 341                          const struct pci_device_id *pci_id)
 342 {
 343         int idx, nm, low_latency_mode = 0, irq_supported = 0;
 344         int adapter_index;
 345         unsigned int memlen;
 346         struct hpi_message hm;
 347         struct hpi_response hr;
 348         struct hpi_adapter adapter;
 349         struct hpi_pci pci;
 350
 351         memset(&adapter, 0, sizeof(adapter));
 352
 353         dev_printk(KERN_DEBUG, &pci_dev->dev,
 354                 "probe %04x:%04x,%04x:%04x,%04x\n", pci_dev->vendor,
 355                 pci_dev->device, pci_dev->subsystem_vendor,
 356                 pci_dev->subsystem_device, pci_dev->devfn);
 357
 358         if (pci_enable_device(pci_dev) < 0) {
 359                 dev_err(&pci_dev->dev,
 360                         "pci_enable_device failed, disabling device\n");
 361                 return -EIO;
 362         }
 363
 364         pci_set_master(pci_dev);        /* also sets latency timer if < 16 */
 365
 366         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 367                 HPI_SUBSYS_CREATE_ADAPTER);
 368         hpi_init_response(&hr, HPI_OBJ_SUBSYSTEM, HPI_SUBSYS_CREATE_ADAPTER,
 369                 HPI_ERROR_PROCESSING_MESSAGE);
 370
 371         hm.adapter_index = HPI_ADAPTER_INDEX_INVALID;
 372
 373         nm = HPI_MAX_ADAPTER_MEM_SPACES;
 374
 375         for (idx = 0; idx < nm; idx++) {
 376                 HPI_DEBUG_LOG(INFO, "resource %d %pR\n", idx,
 377                         &pci_dev->resource[idx]);
 378
 379                 if (pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM) {
 380                         memlen = pci_resource_len(pci_dev, idx);
 381                         pci.ap_mem_base[idx] =
 382                                 ioremap(pci_resource_start(pci_dev, idx),
 383                                 memlen);
 384                         if (!pci.ap_mem_base[idx]) {
 385                                 HPI_DEBUG_LOG(ERROR,
 386                                         "ioremap failed, aborting\n");
 387                                 /* unmap previously mapped pci mem space */
 388                                 goto err;
 389                         }
 390                 }
 391         }
 392
 393         pci.pci_dev = pci_dev;
 394         hm.u.s.resource.bus_type = HPI_BUS_PCI;
 395         hm.u.s.resource.r.pci = &pci;
 396
 397         /* call CreateAdapterObject on the relevant hpi module */
 398         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 399         if (hr.error)
 400                 goto err;
 401
 402         adapter_index = hr.u.s.adapter_index;
 403         adapter.adapter = hpi_find_adapter(adapter_index);
 404
 405         if (prealloc_stream_buf) {
 406                 adapter.p_buffer = vmalloc(prealloc_stream_buf);
 407                 if (!adapter.p_buffer) {
 408                         HPI_DEBUG_LOG(ERROR,
 409                                 "HPI could not allocate "
 410                                 "kernel buffer size %d\n",
 411                                 prealloc_stream_buf);
 412                         goto err;
 413                 }
 414         }
 415
 416         hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 417                 HPI_ADAPTER_OPEN);
 418         hm.adapter_index = adapter.adapter->index;
 419         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 420
 421         if (hr.error) {
 422                 HPI_DEBUG_LOG(ERROR, "HPI_ADAPTER_OPEN failed, aborting\n");
 423                 goto err;
 424         }
 425
 426         /* Check if current mode == Low Latency mode */
 427         hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 428                 HPI_ADAPTER_GET_MODE);
 429         hm.adapter_index = adapter.adapter->index;
 430         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 431
 432         if (!hr.error
 433                 && hr.u.ax.mode.adapter_mode == HPI_ADAPTER_MODE_LOW_LATENCY)
 434                 low_latency_mode = 1;
 435         else
 436                 dev_info(&pci_dev->dev,
 437                         "Adapter at index %d is not in low latency mode\n",
 438                         adapter.adapter->index);
 439
 440         /* Check if IRQs are supported */
 441         hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 442                 HPI_ADAPTER_GET_PROPERTY);
 443         hm.adapter_index = adapter.adapter->index;
 444         hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_SUPPORTS_IRQ;
 445         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 446         if (hr.error || !hr.u.ax.property_get.parameter1) {
 447                 dev_info(&pci_dev->dev,
 448                         "IRQs not supported by adapter at index %d\n",
 449                         adapter.adapter->index);
 450         } else {
 451                 irq_supported = 1;
 452         }
 453
 454         /* WARNING can't init mutex in 'adapter'
 455          * and then copy it to adapters[] ?!?!
 456          */
 457         adapters[adapter_index] = adapter;
 458         mutex_init(&adapters[adapter_index].mutex);
 459         pci_set_drvdata(pci_dev, &adapters[adapter_index]);
 460
 461         if (low_latency_mode && irq_supported) {
 462                 if (!adapter.adapter->irq_query_and_clear) {
 463                         dev_err(&pci_dev->dev,
 464                                 "no IRQ handler for adapter %d, aborting\n",
 465                                 adapter.adapter->index);
 466                         goto err;
 467                 }
 468
 469                 /* Disable IRQ generation on DSP side by setting the rate to 0 */
 470                 hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 471                         HPI_ADAPTER_SET_PROPERTY);
 472                 hm.adapter_index = adapter.adapter->index;
 473                 hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE;
 474                 hm.u.ax.property_set.parameter1 = 0;
 475                 hm.u.ax.property_set.parameter2 = 0;
 476                 hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 477                 if (hr.error) {
 478                         HPI_DEBUG_LOG(ERROR,
 479                                 "HPI_ADAPTER_GET_MODE failed, aborting\n");
 480                         goto err;
 481                 }
 482
 483                 /* Note: request_irq calls asihpi_isr here */
 484                 if (request_irq(pci_dev->irq, asihpi_isr, IRQF_SHARED,
 485                                 "asihpi", &adapters[adapter_index])) {
 486                         dev_err(&pci_dev->dev, "request_irq(%d) failed\n",
 487                                 pci_dev->irq);
 488                         goto err;
 489                 }
 490
 491                 adapters[adapter_index].interrupt_mode = 1;
 492
 493                 dev_info(&pci_dev->dev, "using irq %d\n", pci_dev->irq);
 494                 adapters[adapter_index].irq = pci_dev->irq;
 495         } else {
 496                 dev_info(&pci_dev->dev, "using polled mode\n");
 497         }
 498
 499         dev_info(&pci_dev->dev, "probe succeeded for ASI%04X HPI index %d\n",
 500                  adapter.adapter->type, adapter_index);
 501
 502         return 0;
 503
 504 err:
 505         for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
 506                 if (pci.ap_mem_base[idx]) {
 507                         iounmap(pci.ap_mem_base[idx]);
 508                         pci.ap_mem_base[idx] = NULL;
 509                 }
 510         }
 511
 512         if (adapter.p_buffer) {
 513                 adapter.buffer_size = 0;
 514                 vfree(adapter.p_buffer);
 515         }
 516
 517         HPI_DEBUG_LOG(ERROR, "adapter_probe failed\n");
 518         return -ENODEV;
 519 }
 520
 521 void asihpi_adapter_remove(struct pci_dev *pci_dev)
 522 {
 523         int idx;
 524         struct hpi_message hm;
 525         struct hpi_response hr;
 526         struct hpi_adapter *pa;
 527         struct hpi_pci pci;
 528
 529         pa = pci_get_drvdata(pci_dev);
 530         pci = pa->adapter->pci;
 531
 532         /* Disable IRQ generation on DSP side */
 533         hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 534                 HPI_ADAPTER_SET_PROPERTY);
 535         hm.adapter_index = pa->adapter->index;
 536         hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE;
 537         hm.u.ax.property_set.parameter1 = 0;
 538         hm.u.ax.property_set.parameter2 = 0;
 539         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 540
 541         hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 542                 HPI_ADAPTER_DELETE);
 543         hm.adapter_index = pa->adapter->index;
 544         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 545
 546         /* unmap PCI memory space, mapped during device init. */
 547         for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; ++idx)
 548                 iounmap(pci.ap_mem_base[idx]);
 549
 550         if (pa->irq)
 551                 free_irq(pa->irq, pa);
 552
 553         vfree(pa->p_buffer);
 554
 555         if (1)
 556                 dev_info(&pci_dev->dev,
 557                          "remove %04x:%04x,%04x:%04x,%04x, HPI index %d\n",
 558                          pci_dev->vendor, pci_dev->device,
 559                          pci_dev->subsystem_vendor, pci_dev->subsystem_device,
 560                          pci_dev->devfn, pa->adapter->index);
 561
 562         memset(pa, 0, sizeof(*pa));
 563 }
 564
 565 void __init asihpi_init(void)
 566 {
 567         struct hpi_message hm;
 568         struct hpi_response hr;
 569
 570         memset(adapters, 0, sizeof(adapters));
 571
 572         printk(KERN_INFO "ASIHPI driver " HPI_VER_STRING "\n");
 573
 574         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 575                 HPI_SUBSYS_DRIVER_LOAD);
 576         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 577 }
 578
 579 void asihpi_exit(void)
 580 {
 581         struct hpi_message hm;
 582         struct hpi_response hr;
 583
 584         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 585                 HPI_SUBSYS_DRIVER_UNLOAD);
 586         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 587 }