sound/pci/asihpi/hpioctl.c

   1 /*******************************************************************************
   2
   3     AudioScience HPI driver
   4     Copyright (C) 1997-2011  AudioScience Inc. <support@audioscience.com>
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of version 2 of the GNU General Public License as
   8     published by the Free Software Foundation;
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18
  19 Common Linux HPI ioctl and module probe/remove functions
  20 *******************************************************************************/
  21 #define SOURCEFILE_NAME "hpioctl.c"
  22
  23 #include "hpi_internal.h"
  24 #include "hpi_version.h"
  25 #include "hpimsginit.h"
  26 #include "hpidebug.h"
  27 #include "hpimsgx.h"
  28 #include "hpioctl.h"
  29 #include "hpicmn.h"
  30
  31 #include <linux/fs.h>
  32 #include <linux/slab.h>
  33 #include <linux/moduleparam.h>
  34 #include <asm/uaccess.h>
  35 #include <linux/pci.h>
  36 #include <linux/stringify.h>
  37 #include <linux/module.h>
  38
  39 #ifdef MODULE_FIRMWARE
  40 MODULE_FIRMWARE("asihpi/dsp5000.bin");
  41 MODULE_FIRMWARE("asihpi/dsp6200.bin");
  42 MODULE_FIRMWARE("asihpi/dsp6205.bin");
  43 MODULE_FIRMWARE("asihpi/dsp6400.bin");
  44 MODULE_FIRMWARE("asihpi/dsp6600.bin");
  45 MODULE_FIRMWARE("asihpi/dsp8700.bin");
  46 MODULE_FIRMWARE("asihpi/dsp8900.bin");
  47 #endif
  48
  49 static int prealloc_stream_buf;
  50 module_param(prealloc_stream_buf, int, S_IRUGO);
  51 MODULE_PARM_DESC(prealloc_stream_buf,
  52         "Preallocate size for per-adapter stream buffer");
  53
  54 /* Allow the debug level to be changed after module load.
  55  E.g.   echo 2 > /sys/module/asihpi/parameters/hpiDebugLevel
  56 */
  57 module_param(hpi_debug_level, int, S_IRUGO | S_IWUSR);
  58 MODULE_PARM_DESC(hpi_debug_level, "debug verbosity 0..5");
  59
  60 /* List of adapters found */
  61 static struct hpi_adapter adapters[HPI_MAX_ADAPTERS];
  62
  63 /* Wrapper function to HPI_Message to enable dumping of the
  64    message and response types.
  65 */
  66 static void hpi_send_recv_f(struct hpi_message *phm, struct hpi_response *phr,
  67         struct file *file)
  68 {
  69         if ((phm->adapter_index >= HPI_MAX_ADAPTERS)
  70                 && (phm->object != HPI_OBJ_SUBSYSTEM))
  71                 phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
  72         else
  73                 hpi_send_recv_ex(phm, phr, file);
  74 }
  75
  76 /* This is called from hpifunc.c functions, called by ALSA
  77  * (or other kernel process) In this case there is no file descriptor
  78  * available for the message cache code
  79  */
  80 void hpi_send_recv(struct hpi_message *phm, struct hpi_response *phr)
  81 {
  82         hpi_send_recv_f(phm, phr, HOWNER_KERNEL);
  83 }
  84
  85 EXPORT_SYMBOL(hpi_send_recv);
  86 /* for radio-asihpi */
  87
  88 int asihpi_hpi_release(struct file *file)
  89 {
  90         struct hpi_message hm;
  91         struct hpi_response hr;
  92
  93 /* HPI_DEBUG_LOG(INFO,"hpi_release file %p, pid %d\n", file, current->pid); */
  94         /* close the subsystem just in case the application forgot to. */
  95         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
  96                 HPI_SUBSYS_CLOSE);
  97         hpi_send_recv_ex(&hm, &hr, file);
  98         return 0;
  99 }
 100
 101 long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 102 {
 103         struct hpi_ioctl_linux __user *phpi_ioctl_data;
 104         void __user *puhm;
 105         void __user *puhr;
 106         union hpi_message_buffer_v1 *hm;
 107         union hpi_response_buffer_v1 *hr;
 108         u16 res_max_size;
 109         u32 uncopied_bytes;
 110         int err = 0;
 111
 112         if (cmd != HPI_IOCTL_LINUX)
 113                 return -EINVAL;
 114
 115         hm = kmalloc(sizeof(*hm), GFP_KERNEL);
 116         hr = kmalloc(sizeof(*hr), GFP_KERNEL);
 117         if (!hm || !hr) {
 118                 err = -ENOMEM;
 119                 goto out;
 120         }
 121
 122         phpi_ioctl_data = (struct hpi_ioctl_linux __user *)arg;
 123
 124         /* Read the message and response pointers from user space.  */
 125         if (get_user(puhm, &phpi_ioctl_data->phm)
 126                 || get_user(puhr, &phpi_ioctl_data->phr)) {
 127                 err = -EFAULT;
 128                 goto out;
 129         }
 130
 131         /* Now read the message size and data from user space.  */
 132         if (get_user(hm->h.size, (u16 __user *)puhm)) {
 133                 err = -EFAULT;
 134                 goto out;
 135         }
 136         if (hm->h.size > sizeof(*hm))
 137                 hm->h.size = sizeof(*hm);
 138
 139         /* printk(KERN_INFO "message size %d\n", hm->h.wSize); */
 140
 141         uncopied_bytes = copy_from_user(hm, puhm, hm->h.size);
 142         if (uncopied_bytes) {
 143                 HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
 144                 err = -EFAULT;
 145                 goto out;
 146         }
 147
 148         if (get_user(res_max_size, (u16 __user *)puhr)) {
 149                 err = -EFAULT;
 150                 goto out;
 151         }
 152         /* printk(KERN_INFO "user response size %d\n", res_max_size); */
 153         if (res_max_size < sizeof(struct hpi_response_header)) {
 154                 HPI_DEBUG_LOG(WARNING, "small res size %d\n", res_max_size);
 155                 err = -EFAULT;
 156                 goto out;
 157         }
 158
 159         switch (hm->h.function) {
 160         case HPI_SUBSYS_CREATE_ADAPTER:
 161         case HPI_ADAPTER_DELETE:
 162                 /* Application must not use these functions! */
 163                 hr->h.size = sizeof(hr->h);
 164                 hr->h.error = HPI_ERROR_INVALID_OPERATION;
 165                 hr->h.function = hm->h.function;
 166                 uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
 167                 if (uncopied_bytes)
 168                         err = -EFAULT;
 169                 else
 170                         err = 0;
 171                 goto out;
 172         }
 173
 174         hr->h.size = res_max_size;
 175         if (hm->h.object == HPI_OBJ_SUBSYSTEM) {
 176                 hpi_send_recv_f(&hm->m0, &hr->r0, file);
 177         } else {
 178                 u16 __user *ptr = NULL;
 179                 u32 size = 0;
 180                 /* -1=no data 0=read from user mem, 1=write to user mem */
 181                 int wrflag = -1;
 182                 struct hpi_adapter *pa = NULL;
 183
 184                 if (hm->h.adapter_index < ARRAY_SIZE(adapters))
 185                         pa = &adapters[hm->h.adapter_index];
 186
 187                 if (!pa || !pa->adapter || !pa->adapter->type) {
 188                         hpi_init_response(&hr->r0, hm->h.object,
 189                                 hm->h.function, HPI_ERROR_BAD_ADAPTER_NUMBER);
 190
 191                         uncopied_bytes =
 192                                 copy_to_user(puhr, hr, sizeof(hr->h));
 193                         if (uncopied_bytes)
 194                                 err = -EFAULT;
 195                         else
 196                                 err = 0;
 197                         goto out;
 198                 }
 199
 200                 if (mutex_lock_interruptible(&pa->mutex)) {
 201                         err = -EINTR;
 202                         goto out;
 203                 }
 204
 205                 /* Dig out any pointers embedded in the message.  */
 206                 switch (hm->h.function) {
 207                 case HPI_OSTREAM_WRITE:
 208                 case HPI_ISTREAM_READ:{
 209                                 /* Yes, sparse, this is correct. */
 210                                 ptr = (u16 __user *)hm->m0.u.d.u.data.pb_data;
 211                                 size = hm->m0.u.d.u.data.data_size;
 212
 213                                 /* Allocate buffer according to application request.
 214                                    ?Is it better to alloc/free for the duration
 215                                    of the transaction?
 216                                  */
 217                                 if (pa->buffer_size < size) {
 218                                         HPI_DEBUG_LOG(DEBUG,
 219                                                 "Realloc adapter %d stream "
 220                                                 "buffer from %zd to %d\n",
 221                                                 hm->h.adapter_index,
 222                                                 pa->buffer_size, size);
 223                                         if (pa->p_buffer) {
 224                                                 pa->buffer_size = 0;
 225                                                 vfree(pa->p_buffer);
 226                                         }
 227                                         pa->p_buffer = vmalloc(size);
 228                                         if (pa->p_buffer)
 229                                                 pa->buffer_size = size;
 230                                         else {
 231                                                 HPI_DEBUG_LOG(ERROR,
 232                                                         "HPI could not allocate "
 233                                                         "stream buffer size %d\n",
 234                                                         size);
 235
 236                                                 mutex_unlock(&pa->mutex);
 237                                                 err = -EINVAL;
 238                                                 goto out;
 239                                         }
 240                                 }
 241
 242                                 hm->m0.u.d.u.data.pb_data = pa->p_buffer;
 243                                 if (hm->h.function == HPI_ISTREAM_READ)
 244                                         /* from card, WRITE to user mem */
 245                                         wrflag = 1;
 246                                 else
 247                                         wrflag = 0;
 248                                 break;
 249                         }
 250
 251                 default:
 252                         size = 0;
 253                         break;
 254                 }
 255
 256                 if (size && (wrflag == 0)) {
 257                         uncopied_bytes =
 258                                 copy_from_user(pa->p_buffer, ptr, size);
 259                         if (uncopied_bytes)
 260                                 HPI_DEBUG_LOG(WARNING,
 261                                         "Missed %d of %d "
 262                                         "bytes from user\n", uncopied_bytes,
 263                                         size);
 264                 }
 265
 266                 hpi_send_recv_f(&hm->m0, &hr->r0, file);
 267
 268                 if (size && (wrflag == 1)) {
 269                         uncopied_bytes =
 270                                 copy_to_user(ptr, pa->p_buffer, size);
 271                         if (uncopied_bytes)
 272                                 HPI_DEBUG_LOG(WARNING,
 273                                         "Missed %d of %d " "bytes to user\n",
 274                                         uncopied_bytes, size);
 275                 }
 276
 277                 mutex_unlock(&pa->mutex);
 278         }
 279
 280         /* on return response size must be set */
 281         /*printk(KERN_INFO "response size %d\n", hr->h.wSize); */
 282
 283         if (!hr->h.size) {
 284                 HPI_DEBUG_LOG(ERROR, "response zero size\n");
 285                 err = -EFAULT;
 286                 goto out;
 287         }
 288
 289         if (hr->h.size > res_max_size) {
 290                 HPI_DEBUG_LOG(ERROR, "response too big %d %d\n", hr->h.size,
 291                         res_max_size);
 292                 hr->h.error = HPI_ERROR_RESPONSE_BUFFER_TOO_SMALL;
 293                 hr->h.specific_error = hr->h.size;
 294                 hr->h.size = sizeof(hr->h);
 295         }
 296
 297         uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
 298         if (uncopied_bytes) {
 299                 HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
 300                 err = -EFAULT;
 301                 goto out;
 302         }
 303
 304 out:
 305         kfree(hm);
 306         kfree(hr);
 307         return err;
 308 }
 309
 310 int __devinit asihpi_adapter_probe(struct pci_dev *pci_dev,
 311         const struct pci_device_id *pci_id)
 312 {
 313         int idx, nm;
 314         int adapter_index;
 315         unsigned int memlen;
 316         struct hpi_message hm;
 317         struct hpi_response hr;
 318         struct hpi_adapter adapter;
 319         struct hpi_pci pci;
 320
 321         memset(&adapter, 0, sizeof(adapter));
 322
 323         dev_printk(KERN_DEBUG, &pci_dev->dev,
 324                 "probe %04x:%04x,%04x:%04x,%04x\n", pci_dev->vendor,
 325                 pci_dev->device, pci_dev->subsystem_vendor,
 326                 pci_dev->subsystem_device, pci_dev->devfn);
 327
 328         if (pci_enable_device(pci_dev) < 0) {
 329                 dev_printk(KERN_ERR, &pci_dev->dev,
 330                         "pci_enable_device failed, disabling device\n");
 331                 return -EIO;
 332         }
 333
 334         pci_set_master(pci_dev);        /* also sets latency timer if < 16 */
 335
 336         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 337                 HPI_SUBSYS_CREATE_ADAPTER);
 338         hpi_init_response(&hr, HPI_OBJ_SUBSYSTEM, HPI_SUBSYS_CREATE_ADAPTER,
 339                 HPI_ERROR_PROCESSING_MESSAGE);
 340
 341         hm.adapter_index = HPI_ADAPTER_INDEX_INVALID;
 342
 343         nm = HPI_MAX_ADAPTER_MEM_SPACES;
 344
 345         for (idx = 0; idx < nm; idx++) {
 346                 HPI_DEBUG_LOG(INFO, "resource %d %pR\n", idx,
 347                         &pci_dev->resource[idx]);
 348
 349                 if (pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM) {
 350                         memlen = pci_resource_len(pci_dev, idx);
 351                         pci.ap_mem_base[idx] =
 352                                 ioremap(pci_resource_start(pci_dev, idx),
 353                                 memlen);
 354                         if (!pci.ap_mem_base[idx]) {
 355                                 HPI_DEBUG_LOG(ERROR,
 356                                         "ioremap failed, aborting\n");
 357                                 /* unmap previously mapped pci mem space */
 358                                 goto err;
 359                         }
 360                 }
 361         }
 362
 363         pci.pci_dev = pci_dev;
 364         hm.u.s.resource.bus_type = HPI_BUS_PCI;
 365         hm.u.s.resource.r.pci = &pci;
 366
 367         /* call CreateAdapterObject on the relevant hpi module */
 368         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 369         if (hr.error)
 370                 goto err;
 371
 372         adapter_index = hr.u.s.adapter_index;
 373         adapter.adapter = hpi_find_adapter(adapter_index);
 374
 375         if (prealloc_stream_buf) {
 376                 adapter.p_buffer = vmalloc(prealloc_stream_buf);
 377                 if (!adapter.p_buffer) {
 378                         HPI_DEBUG_LOG(ERROR,
 379                                 "HPI could not allocate "
 380                                 "kernel buffer size %d\n",
 381                                 prealloc_stream_buf);
 382                         goto err;
 383                 }
 384         }
 385
 386         hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 387                 HPI_ADAPTER_OPEN);
 388         hm.adapter_index = adapter.adapter->index;
 389         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 390
 391         if (hr.error)
 392                 goto err;
 393
 394         /* WARNING can't init mutex in 'adapter'
 395          * and then copy it to adapters[] ?!?!
 396          */
 397         adapters[adapter_index] = adapter;
 398         mutex_init(&adapters[adapter_index].mutex);
 399         pci_set_drvdata(pci_dev, &adapters[adapter_index]);
 400
 401         dev_printk(KERN_INFO, &pci_dev->dev,
 402                 "probe succeeded for ASI%04X HPI index %d\n",
 403                 adapter.adapter->type, adapter_index);
 404
 405         return 0;
 406
 407 err:
 408         for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
 409                 if (pci.ap_mem_base[idx]) {
 410                         iounmap(pci.ap_mem_base[idx]);
 411                         pci.ap_mem_base[idx] = NULL;
 412                 }
 413         }
 414
 415         if (adapter.p_buffer) {
 416                 adapter.buffer_size = 0;
 417                 vfree(adapter.p_buffer);
 418         }
 419
 420         HPI_DEBUG_LOG(ERROR, "adapter_probe failed\n");
 421         return -ENODEV;
 422 }
 423
 424 void __devexit asihpi_adapter_remove(struct pci_dev *pci_dev)
 425 {
 426         int idx;
 427         struct hpi_message hm;
 428         struct hpi_response hr;
 429         struct hpi_adapter *pa;
 430         struct hpi_pci pci;
 431
 432         pa = pci_get_drvdata(pci_dev);
 433         pci = pa->adapter->pci;
 434
 435         hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 436                 HPI_ADAPTER_DELETE);
 437         hm.adapter_index = pa->adapter->index;
 438         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 439
 440         /* unmap PCI memory space, mapped during device init. */
 441         for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
 442                 if (pci.ap_mem_base[idx])
 443                         iounmap(pci.ap_mem_base[idx]);
 444         }
 445
 446         if (pa->p_buffer)
 447                 vfree(pa->p_buffer);
 448
 449         pci_set_drvdata(pci_dev, NULL);
 450         if (1)
 451                 dev_printk(KERN_INFO, &pci_dev->dev,
 452                         "remove %04x:%04x,%04x:%04x,%04x," " HPI index %d.\n",
 453                         pci_dev->vendor, pci_dev->device,
 454                         pci_dev->subsystem_vendor, pci_dev->subsystem_device,
 455                         pci_dev->devfn, pa->adapter->index);
 456
 457         memset(pa, 0, sizeof(*pa));
 458 }
 459
 460 void __init asihpi_init(void)
 461 {
 462         struct hpi_message hm;
 463         struct hpi_response hr;
 464
 465         memset(adapters, 0, sizeof(adapters));
 466
 467         printk(KERN_INFO "ASIHPI driver " HPI_VER_STRING "\n");
 468
 469         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 470                 HPI_SUBSYS_DRIVER_LOAD);
 471         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 472 }
 473
 474 void asihpi_exit(void)
 475 {
 476         struct hpi_message hm;
 477         struct hpi_response hr;
 478
 479         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 480                 HPI_SUBSYS_DRIVER_UNLOAD);
 481         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 482 }