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 "hpimsginit.h"
  25 #include "hpidebug.h"
  26 #include "hpimsgx.h"
  27 #include "hpioctl.h"
  28 #include "hpicmn.h"
  29
  30 #include <linux/fs.h>
  31 #include <linux/slab.h>
  32 #include <linux/moduleparam.h>
  33 #include <asm/uaccess.h>
  34 #include <linux/pci.h>
  35 #include <linux/stringify.h>
  36
  37 #ifdef MODULE_FIRMWARE
  38 MODULE_FIRMWARE("asihpi/dsp5000.bin");
  39 MODULE_FIRMWARE("asihpi/dsp6200.bin");
  40 MODULE_FIRMWARE("asihpi/dsp6205.bin");
  41 MODULE_FIRMWARE("asihpi/dsp6400.bin");
  42 MODULE_FIRMWARE("asihpi/dsp6600.bin");
  43 MODULE_FIRMWARE("asihpi/dsp8700.bin");
  44 MODULE_FIRMWARE("asihpi/dsp8900.bin");
  45 #endif
  46
  47 static int prealloc_stream_buf;
  48 module_param(prealloc_stream_buf, int, S_IRUGO);
  49 MODULE_PARM_DESC(prealloc_stream_buf,
  50         "Preallocate size for per-adapter stream buffer");
  51
  52 /* Allow the debug level to be changed after module load.
  53  E.g.   echo 2 > /sys/module/asihpi/parameters/hpiDebugLevel
  54 */
  55 module_param(hpi_debug_level, int, S_IRUGO | S_IWUSR);
  56 MODULE_PARM_DESC(hpi_debug_level, "debug verbosity 0..5");
  57
  58 /* List of adapters found */
  59 static struct hpi_adapter adapters[HPI_MAX_ADAPTERS];
  60
  61 /* Wrapper function to HPI_Message to enable dumping of the
  62    message and response types.
  63 */
  64 static void hpi_send_recv_f(struct hpi_message *phm, struct hpi_response *phr,
  65         struct file *file)
  66 {
  67         int adapter = phm->adapter_index;
  68
  69         if ((adapter >= HPI_MAX_ADAPTERS || adapter < 0)
  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                 u32 adapter_present;
 181                 /* -1=no data 0=read from user mem, 1=write to user mem */
 182                 int wrflag = -1;
 183                 struct hpi_adapter *pa;
 184
 185                 if (hm->h.adapter_index < HPI_MAX_ADAPTERS) {
 186                         pa = &adapters[hm->h.adapter_index];
 187                         adapter_present = pa->type;
 188                 } else {
 189                         adapter_present = 0;
 190                 }
 191
 192                 if (!adapter_present) {
 193                         hpi_init_response(&hr->r0, hm->h.object,
 194                                 hm->h.function, HPI_ERROR_BAD_ADAPTER_NUMBER);
 195
 196                         uncopied_bytes =
 197                                 copy_to_user(puhr, hr, sizeof(hr->h));
 198                         if (uncopied_bytes)
 199                                 err = -EFAULT;
 200                         else
 201                                 err = 0;
 202                         goto out;
 203                 }
 204
 205                 if (mutex_lock_interruptible(&pa->mutex)) {
 206                         err = -EINTR;
 207                         goto out;
 208                 }
 209
 210                 /* Dig out any pointers embedded in the message.  */
 211                 switch (hm->h.function) {
 212                 case HPI_OSTREAM_WRITE:
 213                 case HPI_ISTREAM_READ:{
 214                                 /* Yes, sparse, this is correct. */
 215                                 ptr = (u16 __user *)hm->m0.u.d.u.data.pb_data;
 216                                 size = hm->m0.u.d.u.data.data_size;
 217
 218                                 /* Allocate buffer according to application request.
 219                                    ?Is it better to alloc/free for the duration
 220                                    of the transaction?
 221                                  */
 222                                 if (pa->buffer_size < size) {
 223                                         HPI_DEBUG_LOG(DEBUG,
 224                                                 "Realloc adapter %d stream "
 225                                                 "buffer from %zd to %d\n",
 226                                                 hm->h.adapter_index,
 227                                                 pa->buffer_size, size);
 228                                         if (pa->p_buffer) {
 229                                                 pa->buffer_size = 0;
 230                                                 vfree(pa->p_buffer);
 231                                         }
 232                                         pa->p_buffer = vmalloc(size);
 233                                         if (pa->p_buffer)
 234                                                 pa->buffer_size = size;
 235                                         else {
 236                                                 HPI_DEBUG_LOG(ERROR,
 237                                                         "HPI could not allocate "
 238                                                         "stream buffer size %d\n",
 239                                                         size);
 240
 241                                                 mutex_unlock(&pa->mutex);
 242                                                 err = -EINVAL;
 243                                                 goto out;
 244                                         }
 245                                 }
 246
 247                                 hm->m0.u.d.u.data.pb_data = pa->p_buffer;
 248                                 if (hm->h.function == HPI_ISTREAM_READ)
 249                                         /* from card, WRITE to user mem */
 250                                         wrflag = 1;
 251                                 else
 252                                         wrflag = 0;
 253                                 break;
 254                         }
 255
 256                 default:
 257                         size = 0;
 258                         break;
 259                 }
 260
 261                 if (size && (wrflag == 0)) {
 262                         uncopied_bytes =
 263                                 copy_from_user(pa->p_buffer, ptr, size);
 264                         if (uncopied_bytes)
 265                                 HPI_DEBUG_LOG(WARNING,
 266                                         "Missed %d of %d "
 267                                         "bytes from user\n", uncopied_bytes,
 268                                         size);
 269                 }
 270
 271                 hpi_send_recv_f(&hm->m0, &hr->r0, file);
 272
 273                 if (size && (wrflag == 1)) {
 274                         uncopied_bytes =
 275                                 copy_to_user(ptr, pa->p_buffer, size);
 276                         if (uncopied_bytes)
 277                                 HPI_DEBUG_LOG(WARNING,
 278                                         "Missed %d of %d " "bytes to user\n",
 279                                         uncopied_bytes, size);
 280                 }
 281
 282                 mutex_unlock(&pa->mutex);
 283         }
 284
 285         /* on return response size must be set */
 286         /*printk(KERN_INFO "response size %d\n", hr->h.wSize); */
 287
 288         if (!hr->h.size) {
 289                 HPI_DEBUG_LOG(ERROR, "response zero size\n");
 290                 err = -EFAULT;
 291                 goto out;
 292         }
 293
 294         if (hr->h.size > res_max_size) {
 295                 HPI_DEBUG_LOG(ERROR, "response too big %d %d\n", hr->h.size,
 296                         res_max_size);
 297                 hr->h.error = HPI_ERROR_RESPONSE_BUFFER_TOO_SMALL;
 298                 hr->h.specific_error = hr->h.size;
 299                 hr->h.size = sizeof(hr->h);
 300         }
 301
 302         uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
 303         if (uncopied_bytes) {
 304                 HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
 305                 err = -EFAULT;
 306                 goto out;
 307         }
 308
 309 out:
 310         kfree(hm);
 311         kfree(hr);
 312         return err;
 313 }
 314
 315 int __devinit asihpi_adapter_probe(struct pci_dev *pci_dev,
 316         const struct pci_device_id *pci_id)
 317 {
 318         int idx, nm;
 319         unsigned int memlen;
 320         struct hpi_message hm;
 321         struct hpi_response hr;
 322         struct hpi_adapter adapter;
 323         struct hpi_pci pci;
 324
 325         memset(&adapter, 0, sizeof(adapter));
 326
 327         dev_printk(KERN_DEBUG, &pci_dev->dev,
 328                 "probe %04x:%04x,%04x:%04x,%04x\n", pci_dev->vendor,
 329                 pci_dev->device, pci_dev->subsystem_vendor,
 330                 pci_dev->subsystem_device, pci_dev->devfn);
 331
 332         if (pci_enable_device(pci_dev) < 0) {
 333                 dev_printk(KERN_ERR, &pci_dev->dev,
 334                         "pci_enable_device failed, disabling device\n");
 335                 return -EIO;
 336         }
 337
 338         pci_set_master(pci_dev);        /* also sets latency timer if < 16 */
 339
 340         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 341                 HPI_SUBSYS_CREATE_ADAPTER);
 342         hpi_init_response(&hr, HPI_OBJ_SUBSYSTEM, HPI_SUBSYS_CREATE_ADAPTER,
 343                 HPI_ERROR_PROCESSING_MESSAGE);
 344
 345         hm.adapter_index = HPI_ADAPTER_INDEX_INVALID;
 346
 347         adapter.pci = pci_dev;
 348
 349         nm = HPI_MAX_ADAPTER_MEM_SPACES;
 350
 351         for (idx = 0; idx < nm; idx++) {
 352                 HPI_DEBUG_LOG(INFO, "resource %d %pR\n", idx,
 353                         &pci_dev->resource[idx]);
 354
 355                 if (pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM) {
 356                         memlen = pci_resource_len(pci_dev, idx);
 357                         adapter.ap_remapped_mem_base[idx] =
 358                                 ioremap(pci_resource_start(pci_dev, idx),
 359                                 memlen);
 360                         if (!adapter.ap_remapped_mem_base[idx]) {
 361                                 HPI_DEBUG_LOG(ERROR,
 362                                         "ioremap failed, aborting\n");
 363                                 /* unmap previously mapped pci mem space */
 364                                 goto err;
 365                         }
 366                 }
 367
 368                 pci.ap_mem_base[idx] = adapter.ap_remapped_mem_base[idx];
 369         }
 370
 371         pci.pci_dev = pci_dev;
 372         hm.u.s.resource.bus_type = HPI_BUS_PCI;
 373         hm.u.s.resource.r.pci = &pci;
 374
 375         /* call CreateAdapterObject on the relevant hpi module */
 376         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 377         if (hr.error)
 378                 goto err;
 379
 380         if (prealloc_stream_buf) {
 381                 adapter.p_buffer = vmalloc(prealloc_stream_buf);
 382                 if (!adapter.p_buffer) {
 383                         HPI_DEBUG_LOG(ERROR,
 384                                 "HPI could not allocate "
 385                                 "kernel buffer size %d\n",
 386                                 prealloc_stream_buf);
 387                         goto err;
 388                 }
 389         }
 390
 391         adapter.index = hr.u.s.adapter_index;
 392         adapter.type = hr.u.s.adapter_type;
 393
 394         hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 395                 HPI_ADAPTER_OPEN);
 396         hm.adapter_index = adapter.index;
 397         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 398
 399         if (hr.error)
 400                 goto err;
 401
 402         adapter.snd_card_asihpi = NULL;
 403         /* WARNING can't init mutex in 'adapter'
 404          * and then copy it to adapters[] ?!?!
 405          */
 406         adapters[adapter.index] = adapter;
 407         mutex_init(&adapters[adapter.index].mutex);
 408         pci_set_drvdata(pci_dev, &adapters[adapter.index]);
 409
 410         dev_printk(KERN_INFO, &pci_dev->dev,
 411                 "probe succeeded for ASI%04X HPI index %d\n", adapter.type,
 412                 adapter.index);
 413
 414         return 0;
 415
 416 err:
 417         for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
 418                 if (adapter.ap_remapped_mem_base[idx]) {
 419                         iounmap(adapter.ap_remapped_mem_base[idx]);
 420                         adapter.ap_remapped_mem_base[idx] = NULL;
 421                 }
 422         }
 423
 424         if (adapter.p_buffer) {
 425                 adapter.buffer_size = 0;
 426                 vfree(adapter.p_buffer);
 427         }
 428
 429         HPI_DEBUG_LOG(ERROR, "adapter_probe failed\n");
 430         return -ENODEV;
 431 }
 432
 433 void __devexit asihpi_adapter_remove(struct pci_dev *pci_dev)
 434 {
 435         int idx;
 436         struct hpi_message hm;
 437         struct hpi_response hr;
 438         struct hpi_adapter *pa;
 439         pa = pci_get_drvdata(pci_dev);
 440
 441         hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
 442                 HPI_ADAPTER_DELETE);
 443         hm.adapter_index = pa->index;
 444         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 445
 446         /* unmap PCI memory space, mapped during device init. */
 447         for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
 448                 if (pa->ap_remapped_mem_base[idx]) {
 449                         iounmap(pa->ap_remapped_mem_base[idx]);
 450                         pa->ap_remapped_mem_base[idx] = NULL;
 451                 }
 452         }
 453
 454         if (pa->p_buffer)
 455                 vfree(pa->p_buffer);
 456
 457         pci_set_drvdata(pci_dev, NULL);
 458         if (1)
 459                 dev_printk(KERN_INFO, &pci_dev->dev,
 460                         "remove %04x:%04x,%04x:%04x,%04x," " HPI index %d.\n",
 461                         pci_dev->vendor, pci_dev->device,
 462                         pci_dev->subsystem_vendor, pci_dev->subsystem_device,
 463                         pci_dev->devfn, pa->index);
 464
 465         memset(pa, 0, sizeof(*pa));
 466 }
 467
 468 void __init asihpi_init(void)
 469 {
 470         struct hpi_message hm;
 471         struct hpi_response hr;
 472
 473         memset(adapters, 0, sizeof(adapters));
 474
 475         printk(KERN_INFO "ASIHPI driver " HPI_VER_STRING "\n");
 476
 477         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 478                 HPI_SUBSYS_DRIVER_LOAD);
 479         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 480 }
 481
 482 void asihpi_exit(void)
 483 {
 484         struct hpi_message hm;
 485         struct hpi_response hr;
 486
 487         hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
 488                 HPI_SUBSYS_DRIVER_UNLOAD);
 489         hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
 490 }